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956c36c2 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
f0690a25 GR |
2 | /* |
3 | * Copyright 2015-2017 Google, Inc | |
4 | * | |
f0690a25 GR |
5 | * USB Power Delivery protocol stack. |
6 | */ | |
7 | ||
8 | #include <linux/completion.h> | |
9 | #include <linux/debugfs.h> | |
10 | #include <linux/device.h> | |
3ed8e1c2 | 11 | #include <linux/hrtimer.h> |
02d5be46 | 12 | #include <linux/jiffies.h> |
f0690a25 | 13 | #include <linux/kernel.h> |
3ed8e1c2 | 14 | #include <linux/kthread.h> |
f0690a25 GR |
15 | #include <linux/module.h> |
16 | #include <linux/mutex.h> | |
f2a8aa05 | 17 | #include <linux/power_supply.h> |
f0690a25 | 18 | #include <linux/proc_fs.h> |
c97a8cc1 | 19 | #include <linux/property.h> |
f0690a25 GR |
20 | #include <linux/sched/clock.h> |
21 | #include <linux/seq_file.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/spinlock.h> | |
9f4bc2ed | 24 | #include <linux/usb.h> |
4b4e02c8 | 25 | #include <linux/usb/pd.h> |
64f7c494 | 26 | #include <linux/usb/pd_ado.h> |
4b4e02c8 | 27 | #include <linux/usb/pd_bdo.h> |
64f7c494 | 28 | #include <linux/usb/pd_ext_sdb.h> |
4b4e02c8 | 29 | #include <linux/usb/pd_vdo.h> |
2000016c | 30 | #include <linux/usb/role.h> |
4b4e02c8 | 31 | #include <linux/usb/tcpm.h> |
e9576fe8 | 32 | #include <linux/usb/typec_altmode.h> |
3ed8e1c2 BJS |
33 | |
34 | #include <uapi/linux/sched/types.h> | |
f0690a25 | 35 | |
f0690a25 GR |
36 | #define FOREACH_STATE(S) \ |
37 | S(INVALID_STATE), \ | |
7893f9e1 | 38 | S(TOGGLING), \ |
599f008c | 39 | S(CHECK_CONTAMINANT), \ |
f0690a25 GR |
40 | S(SRC_UNATTACHED), \ |
41 | S(SRC_ATTACH_WAIT), \ | |
42 | S(SRC_ATTACHED), \ | |
43 | S(SRC_STARTUP), \ | |
44 | S(SRC_SEND_CAPABILITIES), \ | |
976daf9d | 45 | S(SRC_SEND_CAPABILITIES_TIMEOUT), \ |
f0690a25 GR |
46 | S(SRC_NEGOTIATE_CAPABILITIES), \ |
47 | S(SRC_TRANSITION_SUPPLY), \ | |
48 | S(SRC_READY), \ | |
49 | S(SRC_WAIT_NEW_CAPABILITIES), \ | |
50 | \ | |
51 | S(SNK_UNATTACHED), \ | |
52 | S(SNK_ATTACH_WAIT), \ | |
53 | S(SNK_DEBOUNCED), \ | |
54 | S(SNK_ATTACHED), \ | |
55 | S(SNK_STARTUP), \ | |
56 | S(SNK_DISCOVERY), \ | |
57 | S(SNK_DISCOVERY_DEBOUNCE), \ | |
58 | S(SNK_DISCOVERY_DEBOUNCE_DONE), \ | |
59 | S(SNK_WAIT_CAPABILITIES), \ | |
60 | S(SNK_NEGOTIATE_CAPABILITIES), \ | |
2eadc33f | 61 | S(SNK_NEGOTIATE_PPS_CAPABILITIES), \ |
f0690a25 GR |
62 | S(SNK_TRANSITION_SINK), \ |
63 | S(SNK_TRANSITION_SINK_VBUS), \ | |
64 | S(SNK_READY), \ | |
65 | \ | |
66 | S(ACC_UNATTACHED), \ | |
67 | S(DEBUG_ACC_ATTACHED), \ | |
68 | S(AUDIO_ACC_ATTACHED), \ | |
69 | S(AUDIO_ACC_DEBOUNCE), \ | |
70 | \ | |
71 | S(HARD_RESET_SEND), \ | |
72 | S(HARD_RESET_START), \ | |
73 | S(SRC_HARD_RESET_VBUS_OFF), \ | |
74 | S(SRC_HARD_RESET_VBUS_ON), \ | |
75 | S(SNK_HARD_RESET_SINK_OFF), \ | |
76 | S(SNK_HARD_RESET_WAIT_VBUS), \ | |
77 | S(SNK_HARD_RESET_SINK_ON), \ | |
78 | \ | |
79 | S(SOFT_RESET), \ | |
0908c5ac KT |
80 | S(SRC_SOFT_RESET_WAIT_SNK_TX), \ |
81 | S(SNK_SOFT_RESET), \ | |
f0690a25 GR |
82 | S(SOFT_RESET_SEND), \ |
83 | \ | |
84 | S(DR_SWAP_ACCEPT), \ | |
85 | S(DR_SWAP_SEND), \ | |
86 | S(DR_SWAP_SEND_TIMEOUT), \ | |
87 | S(DR_SWAP_CANCEL), \ | |
88 | S(DR_SWAP_CHANGE_DR), \ | |
89 | \ | |
90 | S(PR_SWAP_ACCEPT), \ | |
91 | S(PR_SWAP_SEND), \ | |
92 | S(PR_SWAP_SEND_TIMEOUT), \ | |
93 | S(PR_SWAP_CANCEL), \ | |
94 | S(PR_SWAP_START), \ | |
95 | S(PR_SWAP_SRC_SNK_TRANSITION_OFF), \ | |
96 | S(PR_SWAP_SRC_SNK_SOURCE_OFF), \ | |
b965b631 | 97 | S(PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED), \ |
f0690a25 GR |
98 | S(PR_SWAP_SRC_SNK_SINK_ON), \ |
99 | S(PR_SWAP_SNK_SRC_SINK_OFF), \ | |
100 | S(PR_SWAP_SNK_SRC_SOURCE_ON), \ | |
b965b631 | 101 | S(PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP), \ |
f0690a25 GR |
102 | \ |
103 | S(VCONN_SWAP_ACCEPT), \ | |
104 | S(VCONN_SWAP_SEND), \ | |
105 | S(VCONN_SWAP_SEND_TIMEOUT), \ | |
106 | S(VCONN_SWAP_CANCEL), \ | |
107 | S(VCONN_SWAP_START), \ | |
108 | S(VCONN_SWAP_WAIT_FOR_VCONN), \ | |
109 | S(VCONN_SWAP_TURN_ON_VCONN), \ | |
110 | S(VCONN_SWAP_TURN_OFF_VCONN), \ | |
6bd181ba | 111 | S(VCONN_SWAP_SEND_SOFT_RESET), \ |
f0690a25 | 112 | \ |
8dc4bd07 BJS |
113 | S(FR_SWAP_SEND), \ |
114 | S(FR_SWAP_SEND_TIMEOUT), \ | |
115 | S(FR_SWAP_SNK_SRC_TRANSITION_TO_OFF), \ | |
116 | S(FR_SWAP_SNK_SRC_NEW_SINK_READY), \ | |
117 | S(FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED), \ | |
118 | S(FR_SWAP_CANCEL), \ | |
119 | \ | |
f0690a25 GR |
120 | S(SNK_TRY), \ |
121 | S(SNK_TRY_WAIT), \ | |
a0a3e04e BJS |
122 | S(SNK_TRY_WAIT_DEBOUNCE), \ |
123 | S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \ | |
f0690a25 | 124 | S(SRC_TRYWAIT), \ |
02d5be46 | 125 | S(SRC_TRYWAIT_DEBOUNCE), \ |
f0690a25 GR |
126 | S(SRC_TRYWAIT_UNATTACHED), \ |
127 | \ | |
128 | S(SRC_TRY), \ | |
131c7d12 | 129 | S(SRC_TRY_WAIT), \ |
f0690a25 GR |
130 | S(SRC_TRY_DEBOUNCE), \ |
131 | S(SNK_TRYWAIT), \ | |
132 | S(SNK_TRYWAIT_DEBOUNCE), \ | |
133 | S(SNK_TRYWAIT_VBUS), \ | |
134 | S(BIST_RX), \ | |
135 | \ | |
64f7c494 AT |
136 | S(GET_STATUS_SEND), \ |
137 | S(GET_STATUS_SEND_TIMEOUT), \ | |
138 | S(GET_PPS_STATUS_SEND), \ | |
139 | S(GET_PPS_STATUS_SEND_TIMEOUT), \ | |
140 | \ | |
8dc4bd07 BJS |
141 | S(GET_SINK_CAP), \ |
142 | S(GET_SINK_CAP_TIMEOUT), \ | |
143 | \ | |
f0690a25 | 144 | S(ERROR_RECOVERY), \ |
b17dd571 | 145 | S(PORT_RESET), \ |
0908c5ac KT |
146 | S(PORT_RESET_WAIT_OFF), \ |
147 | \ | |
8dea75e1 | 148 | S(AMS_START), \ |
af8b6270 RB |
149 | S(CHUNK_NOT_SUPP), \ |
150 | \ | |
151 | S(SRC_VDM_IDENTITY_REQUEST) | |
0908c5ac KT |
152 | |
153 | #define FOREACH_AMS(S) \ | |
154 | S(NONE_AMS), \ | |
155 | S(POWER_NEGOTIATION), \ | |
156 | S(GOTOMIN), \ | |
157 | S(SOFT_RESET_AMS), \ | |
158 | S(HARD_RESET), \ | |
159 | S(CABLE_RESET), \ | |
160 | S(GET_SOURCE_CAPABILITIES), \ | |
161 | S(GET_SINK_CAPABILITIES), \ | |
162 | S(POWER_ROLE_SWAP), \ | |
163 | S(FAST_ROLE_SWAP), \ | |
164 | S(DATA_ROLE_SWAP), \ | |
165 | S(VCONN_SWAP), \ | |
166 | S(SOURCE_ALERT), \ | |
167 | S(GETTING_SOURCE_EXTENDED_CAPABILITIES),\ | |
168 | S(GETTING_SOURCE_SINK_STATUS), \ | |
169 | S(GETTING_BATTERY_CAPABILITIES), \ | |
170 | S(GETTING_BATTERY_STATUS), \ | |
171 | S(GETTING_MANUFACTURER_INFORMATION), \ | |
172 | S(SECURITY), \ | |
173 | S(FIRMWARE_UPDATE), \ | |
174 | S(DISCOVER_IDENTITY), \ | |
175 | S(SOURCE_STARTUP_CABLE_PLUG_DISCOVER_IDENTITY), \ | |
176 | S(DISCOVER_SVIDS), \ | |
177 | S(DISCOVER_MODES), \ | |
178 | S(DFP_TO_UFP_ENTER_MODE), \ | |
179 | S(DFP_TO_UFP_EXIT_MODE), \ | |
180 | S(DFP_TO_CABLE_PLUG_ENTER_MODE), \ | |
181 | S(DFP_TO_CABLE_PLUG_EXIT_MODE), \ | |
182 | S(ATTENTION), \ | |
183 | S(BIST), \ | |
184 | S(UNSTRUCTURED_VDMS), \ | |
185 | S(STRUCTURED_VDMS), \ | |
186 | S(COUNTRY_INFO), \ | |
187 | S(COUNTRY_CODES) | |
f0690a25 GR |
188 | |
189 | #define GENERATE_ENUM(e) e | |
190 | #define GENERATE_STRING(s) #s | |
191 | ||
192 | enum tcpm_state { | |
193 | FOREACH_STATE(GENERATE_ENUM) | |
194 | }; | |
195 | ||
196 | static const char * const tcpm_states[] = { | |
197 | FOREACH_STATE(GENERATE_STRING) | |
198 | }; | |
199 | ||
0908c5ac KT |
200 | enum tcpm_ams { |
201 | FOREACH_AMS(GENERATE_ENUM) | |
202 | }; | |
203 | ||
204 | static const char * const tcpm_ams_str[] = { | |
205 | FOREACH_AMS(GENERATE_STRING) | |
206 | }; | |
207 | ||
f0690a25 GR |
208 | enum vdm_states { |
209 | VDM_STATE_ERR_BUSY = -3, | |
210 | VDM_STATE_ERR_SEND = -2, | |
211 | VDM_STATE_ERR_TMOUT = -1, | |
212 | VDM_STATE_DONE = 0, | |
213 | /* Anything >0 represents an active state */ | |
214 | VDM_STATE_READY = 1, | |
215 | VDM_STATE_BUSY = 2, | |
216 | VDM_STATE_WAIT_RSP_BUSY = 3, | |
0908c5ac | 217 | VDM_STATE_SEND_MESSAGE = 4, |
f0690a25 GR |
218 | }; |
219 | ||
220 | enum pd_msg_request { | |
221 | PD_MSG_NONE = 0, | |
222 | PD_MSG_CTRL_REJECT, | |
223 | PD_MSG_CTRL_WAIT, | |
64f7c494 | 224 | PD_MSG_CTRL_NOT_SUPP, |
f0690a25 GR |
225 | PD_MSG_DATA_SINK_CAP, |
226 | PD_MSG_DATA_SOURCE_CAP, | |
227 | }; | |
228 | ||
95b4d51c HG |
229 | enum adev_actions { |
230 | ADEV_NONE = 0, | |
231 | ADEV_NOTIFY_USB_AND_QUEUE_VDM, | |
232 | ADEV_QUEUE_VDM, | |
233 | ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL, | |
234 | ADEV_ATTENTION, | |
235 | }; | |
236 | ||
8dc4bd07 BJS |
237 | /* |
238 | * Initial current capability of the new source when vSafe5V is applied during PD3.0 Fast Role Swap. | |
239 | * Based on "Table 6-14 Fixed Supply PDO - Sink" of "USB Power Delivery Specification Revision 3.0, | |
240 | * Version 1.2" | |
241 | */ | |
242 | enum frs_typec_current { | |
243 | FRS_NOT_SUPPORTED, | |
244 | FRS_DEFAULT_POWER, | |
245 | FRS_5V_1P5A, | |
246 | FRS_5V_3A, | |
247 | }; | |
248 | ||
f0690a25 GR |
249 | /* Events from low level driver */ |
250 | ||
251 | #define TCPM_CC_EVENT BIT(0) | |
252 | #define TCPM_VBUS_EVENT BIT(1) | |
253 | #define TCPM_RESET_EVENT BIT(2) | |
8dc4bd07 BJS |
254 | #define TCPM_FRS_EVENT BIT(3) |
255 | #define TCPM_SOURCING_VBUS BIT(4) | |
599f008c | 256 | #define TCPM_PORT_CLEAN BIT(5) |
db9e5470 | 257 | #define TCPM_PORT_ERROR BIT(6) |
f0690a25 GR |
258 | |
259 | #define LOG_BUFFER_ENTRIES 1024 | |
260 | #define LOG_BUFFER_ENTRY_SIZE 128 | |
261 | ||
262 | /* Alternate mode support */ | |
263 | ||
264 | #define SVID_DISCOVERY_MAX 16 | |
e9576fe8 | 265 | #define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX) |
f0690a25 | 266 | |
8dc4bd07 | 267 | #define GET_SINK_CAP_RETRY_MS 100 |
c34e85fa | 268 | #define SEND_DISCOVER_RETRY_MS 100 |
8dc4bd07 | 269 | |
f0690a25 GR |
270 | struct pd_mode_data { |
271 | int svid_index; /* current SVID index */ | |
272 | int nsvids; | |
273 | u16 svids[SVID_DISCOVERY_MAX]; | |
274 | int altmodes; /* number of alternate modes */ | |
e9576fe8 | 275 | struct typec_altmode_desc altmode_desc[ALTMODE_DISCOVERY_MAX]; |
f0690a25 GR |
276 | }; |
277 | ||
e3a07202 BJS |
278 | /* |
279 | * @min_volt: Actual min voltage at the local port | |
280 | * @req_min_volt: Requested min voltage to the port partner | |
281 | * @max_volt: Actual max voltage at the local port | |
282 | * @req_max_volt: Requested max voltage to the port partner | |
283 | * @max_curr: Actual max current at the local port | |
284 | * @req_max_curr: Requested max current of the port partner | |
285 | * @req_out_volt: Requested output voltage to the port partner | |
286 | * @req_op_curr: Requested operating current to the port partner | |
f73800a9 | 287 | * @supported: Parter has at least one APDO hence supports PPS |
e3a07202 BJS |
288 | * @active: PPS mode is active |
289 | */ | |
2eadc33f AT |
290 | struct pd_pps_data { |
291 | u32 min_volt; | |
e3a07202 | 292 | u32 req_min_volt; |
2eadc33f | 293 | u32 max_volt; |
e3a07202 | 294 | u32 req_max_volt; |
2eadc33f | 295 | u32 max_curr; |
e3a07202 BJS |
296 | u32 req_max_curr; |
297 | u32 req_out_volt; | |
298 | u32 req_op_curr; | |
2eadc33f AT |
299 | bool supported; |
300 | bool active; | |
301 | }; | |
302 | ||
cd099cde KT |
303 | struct pd_data { |
304 | struct usb_power_delivery *pd; | |
305 | struct usb_power_delivery_capabilities *source_cap; | |
306 | struct usb_power_delivery_capabilities_desc source_desc; | |
307 | struct usb_power_delivery_capabilities *sink_cap; | |
308 | struct usb_power_delivery_capabilities_desc sink_desc; | |
309 | unsigned int operating_snk_mw; | |
310 | }; | |
311 | ||
f0690a25 GR |
312 | struct tcpm_port { |
313 | struct device *dev; | |
314 | ||
315 | struct mutex lock; /* tcpm state machine lock */ | |
3ed8e1c2 | 316 | struct kthread_worker *wq; |
f0690a25 GR |
317 | |
318 | struct typec_capability typec_caps; | |
319 | struct typec_port *typec_port; | |
320 | ||
321 | struct tcpc_dev *tcpc; | |
2000016c | 322 | struct usb_role_switch *role_sw; |
f0690a25 GR |
323 | |
324 | enum typec_role vconn_role; | |
325 | enum typec_role pwr_role; | |
326 | enum typec_data_role data_role; | |
327 | enum typec_pwr_opmode pwr_opmode; | |
328 | ||
329 | struct usb_pd_identity partner_ident; | |
330 | struct typec_partner_desc partner_desc; | |
331 | struct typec_partner *partner; | |
332 | ||
fb7ff25a RB |
333 | struct usb_pd_identity cable_ident; |
334 | struct typec_cable_desc cable_desc; | |
335 | struct typec_cable *cable; | |
336 | struct typec_plug_desc plug_prime_desc; | |
337 | struct typec_plug *plug_prime; | |
338 | ||
f0690a25 | 339 | enum typec_cc_status cc_req; |
e9e6e164 | 340 | enum typec_cc_status src_rp; /* work only if pd_supported == false */ |
f0690a25 GR |
341 | |
342 | enum typec_cc_status cc1; | |
343 | enum typec_cc_status cc2; | |
344 | enum typec_cc_polarity polarity; | |
345 | ||
346 | bool attached; | |
347 | bool connected; | |
ca4d8344 | 348 | bool registered; |
e9e6e164 | 349 | bool pd_supported; |
9b0ae699 | 350 | enum typec_port_type port_type; |
28b43d3d BJS |
351 | |
352 | /* | |
353 | * Set to true when vbus is greater than VSAFE5V min. | |
354 | * Set to false when vbus falls below vSinkDisconnect max threshold. | |
355 | */ | |
f0690a25 | 356 | bool vbus_present; |
28b43d3d BJS |
357 | |
358 | /* | |
359 | * Set to true when vbus is less than VSAFE0V max. | |
360 | * Set to false when vbus is greater than VSAFE0V max. | |
361 | */ | |
362 | bool vbus_vsafe0v; | |
363 | ||
f0690a25 GR |
364 | bool vbus_never_low; |
365 | bool vbus_source; | |
366 | bool vbus_charge; | |
367 | ||
ef52b4a9 | 368 | /* Set to true when Discover_Identity Command is expected to be sent in Ready states. */ |
f0690a25 GR |
369 | bool send_discover; |
370 | bool op_vsafe5v; | |
371 | ||
372 | int try_role; | |
373 | int try_snk_count; | |
374 | int try_src_count; | |
375 | ||
376 | enum pd_msg_request queued_message; | |
377 | ||
378 | enum tcpm_state enter_state; | |
379 | enum tcpm_state prev_state; | |
380 | enum tcpm_state state; | |
381 | enum tcpm_state delayed_state; | |
3ed8e1c2 | 382 | ktime_t delayed_runtime; |
f0690a25 GR |
383 | unsigned long delay_ms; |
384 | ||
385 | spinlock_t pd_event_lock; | |
386 | u32 pd_events; | |
387 | ||
3ed8e1c2 BJS |
388 | struct kthread_work event_work; |
389 | struct hrtimer state_machine_timer; | |
390 | struct kthread_work state_machine; | |
391 | struct hrtimer vdm_state_machine_timer; | |
392 | struct kthread_work vdm_state_machine; | |
8dc4bd07 BJS |
393 | struct hrtimer enable_frs_timer; |
394 | struct kthread_work enable_frs; | |
c34e85fa KT |
395 | struct hrtimer send_discover_timer; |
396 | struct kthread_work send_discover_work; | |
f0690a25 | 397 | bool state_machine_running; |
ef52b4a9 | 398 | /* Set to true when VDM State Machine has following actions. */ |
8d3a0578 | 399 | bool vdm_sm_running; |
f0690a25 GR |
400 | |
401 | struct completion tx_complete; | |
402 | enum tcpm_transmit_status tx_status; | |
403 | ||
404 | struct mutex swap_lock; /* swap command lock */ | |
405 | bool swap_pending; | |
b17dd571 | 406 | bool non_pd_role_swap; |
f0690a25 GR |
407 | struct completion swap_complete; |
408 | int swap_status; | |
409 | ||
2eadc33f | 410 | unsigned int negotiated_rev; |
f0690a25 GR |
411 | unsigned int message_id; |
412 | unsigned int caps_count; | |
413 | unsigned int hard_reset_count; | |
414 | bool pd_capable; | |
415 | bool explicit_contract; | |
5fec4b54 | 416 | unsigned int rx_msgid; |
f0690a25 | 417 | |
8203d269 | 418 | /* USB PD objects */ |
cd099cde KT |
419 | struct usb_power_delivery **pds; |
420 | struct pd_data **pd_list; | |
8203d269 HK |
421 | struct usb_power_delivery_capabilities *port_source_caps; |
422 | struct usb_power_delivery_capabilities *port_sink_caps; | |
423 | struct usb_power_delivery *partner_pd; | |
424 | struct usb_power_delivery_capabilities *partner_source_caps; | |
425 | struct usb_power_delivery_capabilities *partner_sink_caps; | |
cd099cde | 426 | struct usb_power_delivery *selected_pd; |
8203d269 | 427 | |
f0690a25 GR |
428 | /* Partner capabilities/requests */ |
429 | u32 sink_request; | |
430 | u32 source_caps[PDO_MAX_OBJECTS]; | |
431 | unsigned int nr_source_caps; | |
432 | u32 sink_caps[PDO_MAX_OBJECTS]; | |
433 | unsigned int nr_sink_caps; | |
434 | ||
435 | /* Local capabilities */ | |
cd099cde | 436 | unsigned int pd_count; |
f0690a25 GR |
437 | u32 src_pdo[PDO_MAX_OBJECTS]; |
438 | unsigned int nr_src_pdo; | |
439 | u32 snk_pdo[PDO_MAX_OBJECTS]; | |
440 | unsigned int nr_snk_pdo; | |
7ac50510 KT |
441 | u32 snk_vdo_v1[VDO_MAX_OBJECTS]; |
442 | unsigned int nr_snk_vdo_v1; | |
193a6801 GR |
443 | u32 snk_vdo[VDO_MAX_OBJECTS]; |
444 | unsigned int nr_snk_vdo; | |
f0690a25 | 445 | |
f0690a25 | 446 | unsigned int operating_snk_mw; |
2eadc33f | 447 | bool update_sink_caps; |
f0690a25 | 448 | |
f3dedafb BJS |
449 | /* Requested current / voltage to the port partner */ |
450 | u32 req_current_limit; | |
451 | u32 req_supply_voltage; | |
452 | /* Actual current / voltage limit of the local port */ | |
f0690a25 GR |
453 | u32 current_limit; |
454 | u32 supply_voltage; | |
455 | ||
f2a8aa05 AT |
456 | /* Used to export TA voltage and current */ |
457 | struct power_supply *psy; | |
458 | struct power_supply_desc psy_desc; | |
459 | enum power_supply_usb_type usb_type; | |
460 | ||
f0690a25 GR |
461 | u32 bist_request; |
462 | ||
463 | /* PD state for Vendor Defined Messages */ | |
464 | enum vdm_states vdm_state; | |
465 | u32 vdm_retries; | |
466 | /* next Vendor Defined Message to send */ | |
467 | u32 vdo_data[VDO_MAX_SIZE]; | |
468 | u8 vdo_count; | |
469 | /* VDO to retry if UFP responder replied busy */ | |
470 | u32 vdo_retry; | |
471 | ||
2eadc33f AT |
472 | /* PPS */ |
473 | struct pd_pps_data pps_data; | |
474 | struct completion pps_complete; | |
475 | bool pps_pending; | |
476 | int pps_status; | |
f0690a25 | 477 | |
2eadc33f | 478 | /* Alternate mode data */ |
f0690a25 | 479 | struct pd_mode_data mode_data; |
41d9d753 | 480 | struct pd_mode_data mode_data_prime; |
e9576fe8 | 481 | struct typec_altmode *partner_altmode[ALTMODE_DISCOVERY_MAX]; |
41d9d753 | 482 | struct typec_altmode *plug_prime_altmode[ALTMODE_DISCOVERY_MAX]; |
e9576fe8 | 483 | struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX]; |
f0690a25 | 484 | |
02d5be46 BJS |
485 | /* Deadline in jiffies to exit src_try_wait state */ |
486 | unsigned long max_wait; | |
487 | ||
23b5f732 BJS |
488 | /* port belongs to a self powered device */ |
489 | bool self_powered; | |
490 | ||
8115240c BJS |
491 | /* Sink FRS */ |
492 | enum frs_typec_current new_source_frs_current; | |
8dc4bd07 BJS |
493 | |
494 | /* Sink caps have been queried */ | |
495 | bool sink_cap_done; | |
496 | ||
0908c5ac KT |
497 | /* Collision Avoidance and Atomic Message Sequence */ |
498 | enum tcpm_state upcoming_state; | |
499 | enum tcpm_ams ams; | |
8dea75e1 | 500 | enum tcpm_ams next_ams; |
0908c5ac KT |
501 | bool in_ams; |
502 | ||
3287f58b BJS |
503 | /* Auto vbus discharge status */ |
504 | bool auto_vbus_discharge_enabled; | |
505 | ||
1373fefc BJS |
506 | /* |
507 | * When set, port requests PD_P_SNK_STDBY_MW upon entering SNK_DISCOVERY and | |
4e27465a | 508 | * the actual current limit after RX of PD_CTRL_PSRDY for PD link, |
1373fefc BJS |
509 | * SNK_READY for non-pd link. |
510 | */ | |
511 | bool slow_charger_loop; | |
599f008c BJS |
512 | |
513 | /* | |
514 | * When true indicates that the lower level drivers indicate potential presence | |
515 | * of contaminant in the connector pins based on the tcpm state machine | |
516 | * transitions. | |
517 | */ | |
518 | bool potential_contaminant; | |
e03f6fef RB |
519 | |
520 | /* SOP* Related Fields */ | |
fb7ff25a RB |
521 | /* |
522 | * Flag to determine if SOP' Discover Identity is available. The flag | |
523 | * is set if Discover Identity on SOP' does not immediately follow | |
524 | * Discover Identity on SOP. | |
525 | */ | |
526 | bool send_discover_prime; | |
e03f6fef RB |
527 | /* |
528 | * tx_sop_type determines which SOP* a message is being sent on. | |
529 | * For messages that are queued and not sent immediately such as in | |
530 | * tcpm_queue_message or messages that send after state changes, | |
531 | * the tx_sop_type is set accordingly. | |
532 | */ | |
533 | enum tcpm_transmit_type tx_sop_type; | |
534 | /* | |
535 | * Prior to discovering the port partner's Specification Revision, the | |
536 | * Vconn source and cable plug will use the lower of their two revisions. | |
537 | * | |
538 | * When the port partner's Specification Revision is discovered, the following | |
539 | * rules are put in place. | |
540 | * 1. If the cable revision (1) is lower than the revision negotiated | |
541 | * between the port and partner (2), the port and partner will communicate | |
542 | * on revision (2), but the port and cable will communicate on revision (1). | |
543 | * 2. If the cable revision (1) is higher than the revision negotiated | |
544 | * between the port and partner (2), the port and partner will communicate | |
545 | * on revision (2), and the port and cable will communicate on revision (2) | |
546 | * as well. | |
547 | */ | |
548 | unsigned int negotiated_rev_prime; | |
549 | /* | |
550 | * Each SOP* type must maintain their own tx and rx message IDs | |
551 | */ | |
552 | unsigned int message_id_prime; | |
553 | unsigned int rx_msgid_prime; | |
f0690a25 GR |
554 | #ifdef CONFIG_DEBUG_FS |
555 | struct dentry *dentry; | |
556 | struct mutex logbuffer_lock; /* log buffer access lock */ | |
557 | int logbuffer_head; | |
558 | int logbuffer_tail; | |
559 | u8 *logbuffer[LOG_BUFFER_ENTRIES]; | |
560 | #endif | |
561 | }; | |
562 | ||
563 | struct pd_rx_event { | |
3ed8e1c2 | 564 | struct kthread_work work; |
f0690a25 GR |
565 | struct tcpm_port *port; |
566 | struct pd_message msg; | |
3bbb9ba4 | 567 | enum tcpm_transmit_type rx_sop_type; |
f0690a25 GR |
568 | }; |
569 | ||
0908c5ac KT |
570 | static const char * const pd_rev[] = { |
571 | [PD_REV10] = "rev1", | |
572 | [PD_REV20] = "rev2", | |
573 | [PD_REV30] = "rev3", | |
574 | }; | |
575 | ||
f0690a25 GR |
576 | #define tcpm_cc_is_sink(cc) \ |
577 | ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \ | |
578 | (cc) == TYPEC_CC_RP_3_0) | |
579 | ||
dbc1defe | 580 | /* As long as cc is pulled up, we can consider it as sink. */ |
f0690a25 | 581 | #define tcpm_port_is_sink(port) \ |
dbc1defe | 582 | (tcpm_cc_is_sink((port)->cc1) || tcpm_cc_is_sink((port)->cc2)) |
f0690a25 GR |
583 | |
584 | #define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD) | |
585 | #define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA) | |
586 | #define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN) | |
587 | ||
588 | #define tcpm_port_is_source(port) \ | |
589 | ((tcpm_cc_is_source((port)->cc1) && \ | |
590 | !tcpm_cc_is_source((port)->cc2)) || \ | |
591 | (tcpm_cc_is_source((port)->cc2) && \ | |
592 | !tcpm_cc_is_source((port)->cc1))) | |
593 | ||
594 | #define tcpm_port_is_debug(port) \ | |
595 | (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2)) | |
596 | ||
597 | #define tcpm_port_is_audio(port) \ | |
598 | (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2)) | |
599 | ||
600 | #define tcpm_port_is_audio_detached(port) \ | |
601 | ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \ | |
602 | (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1))) | |
603 | ||
604 | #define tcpm_try_snk(port) \ | |
ff6c8cb1 BJS |
605 | ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \ |
606 | (port)->port_type == TYPEC_PORT_DRP) | |
f0690a25 GR |
607 | |
608 | #define tcpm_try_src(port) \ | |
ff6c8cb1 BJS |
609 | ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \ |
610 | (port)->port_type == TYPEC_PORT_DRP) | |
f0690a25 | 611 | |
6ecc632d LJ |
612 | #define tcpm_data_role_for_source(port) \ |
613 | ((port)->typec_caps.data == TYPEC_PORT_UFP ? \ | |
614 | TYPEC_DEVICE : TYPEC_HOST) | |
615 | ||
616 | #define tcpm_data_role_for_sink(port) \ | |
617 | ((port)->typec_caps.data == TYPEC_PORT_DFP ? \ | |
618 | TYPEC_HOST : TYPEC_DEVICE) | |
619 | ||
0908c5ac KT |
620 | #define tcpm_sink_tx_ok(port) \ |
621 | (tcpm_port_is_sink(port) && \ | |
622 | ((port)->cc1 == TYPEC_CC_RP_3_0 || (port)->cc2 == TYPEC_CC_RP_3_0)) | |
623 | ||
3287f58b BJS |
624 | #define tcpm_wait_for_discharge(port) \ |
625 | (((port)->auto_vbus_discharge_enabled && !(port)->vbus_vsafe0v) ? PD_T_SAFE_0V : 0) | |
626 | ||
f0690a25 GR |
627 | static enum tcpm_state tcpm_default_state(struct tcpm_port *port) |
628 | { | |
9b0ae699 | 629 | if (port->port_type == TYPEC_PORT_DRP) { |
b46a9c90 BJS |
630 | if (port->try_role == TYPEC_SINK) |
631 | return SNK_UNATTACHED; | |
632 | else if (port->try_role == TYPEC_SOURCE) | |
633 | return SRC_UNATTACHED; | |
b46a9c90 | 634 | /* Fall through to return SRC_UNATTACHED */ |
ceeb1625 | 635 | } else if (port->port_type == TYPEC_PORT_SNK) { |
f0690a25 | 636 | return SNK_UNATTACHED; |
b46a9c90 | 637 | } |
f0690a25 GR |
638 | return SRC_UNATTACHED; |
639 | } | |
640 | ||
f0690a25 GR |
641 | static bool tcpm_port_is_disconnected(struct tcpm_port *port) |
642 | { | |
643 | return (!port->attached && port->cc1 == TYPEC_CC_OPEN && | |
644 | port->cc2 == TYPEC_CC_OPEN) || | |
645 | (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 && | |
646 | port->cc1 == TYPEC_CC_OPEN) || | |
647 | (port->polarity == TYPEC_POLARITY_CC2 && | |
648 | port->cc2 == TYPEC_CC_OPEN))); | |
649 | } | |
650 | ||
651 | /* | |
652 | * Logging | |
653 | */ | |
654 | ||
655 | #ifdef CONFIG_DEBUG_FS | |
656 | ||
657 | static bool tcpm_log_full(struct tcpm_port *port) | |
658 | { | |
659 | return port->logbuffer_tail == | |
660 | (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; | |
661 | } | |
662 | ||
e79e0125 | 663 | __printf(2, 0) |
f0690a25 GR |
664 | static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args) |
665 | { | |
666 | char tmpbuffer[LOG_BUFFER_ENTRY_SIZE]; | |
667 | u64 ts_nsec = local_clock(); | |
668 | unsigned long rem_nsec; | |
669 | ||
d5a4f935 | 670 | mutex_lock(&port->logbuffer_lock); |
f0690a25 GR |
671 | if (!port->logbuffer[port->logbuffer_head]) { |
672 | port->logbuffer[port->logbuffer_head] = | |
673 | kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL); | |
d5a4f935 PC |
674 | if (!port->logbuffer[port->logbuffer_head]) { |
675 | mutex_unlock(&port->logbuffer_lock); | |
f0690a25 | 676 | return; |
d5a4f935 | 677 | } |
f0690a25 GR |
678 | } |
679 | ||
680 | vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args); | |
681 | ||
f0690a25 GR |
682 | if (tcpm_log_full(port)) { |
683 | port->logbuffer_head = max(port->logbuffer_head - 1, 0); | |
684 | strcpy(tmpbuffer, "overflow"); | |
685 | } | |
686 | ||
687 | if (port->logbuffer_head < 0 || | |
688 | port->logbuffer_head >= LOG_BUFFER_ENTRIES) { | |
689 | dev_warn(port->dev, | |
690 | "Bad log buffer index %d\n", port->logbuffer_head); | |
691 | goto abort; | |
692 | } | |
693 | ||
694 | if (!port->logbuffer[port->logbuffer_head]) { | |
695 | dev_warn(port->dev, | |
696 | "Log buffer index %d is NULL\n", port->logbuffer_head); | |
697 | goto abort; | |
698 | } | |
699 | ||
700 | rem_nsec = do_div(ts_nsec, 1000000000); | |
701 | scnprintf(port->logbuffer[port->logbuffer_head], | |
702 | LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s", | |
703 | (unsigned long)ts_nsec, rem_nsec / 1000, | |
704 | tmpbuffer); | |
705 | port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; | |
706 | ||
707 | abort: | |
708 | mutex_unlock(&port->logbuffer_lock); | |
709 | } | |
710 | ||
e79e0125 | 711 | __printf(2, 3) |
f0690a25 GR |
712 | static void tcpm_log(struct tcpm_port *port, const char *fmt, ...) |
713 | { | |
714 | va_list args; | |
715 | ||
716 | /* Do not log while disconnected and unattached */ | |
717 | if (tcpm_port_is_disconnected(port) && | |
718 | (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED || | |
599f008c | 719 | port->state == TOGGLING || port->state == CHECK_CONTAMINANT)) |
f0690a25 GR |
720 | return; |
721 | ||
722 | va_start(args, fmt); | |
723 | _tcpm_log(port, fmt, args); | |
724 | va_end(args); | |
725 | } | |
726 | ||
e79e0125 | 727 | __printf(2, 3) |
f0690a25 GR |
728 | static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) |
729 | { | |
730 | va_list args; | |
731 | ||
732 | va_start(args, fmt); | |
733 | _tcpm_log(port, fmt, args); | |
734 | va_end(args); | |
735 | } | |
736 | ||
737 | static void tcpm_log_source_caps(struct tcpm_port *port) | |
738 | { | |
739 | int i; | |
740 | ||
741 | for (i = 0; i < port->nr_source_caps; i++) { | |
742 | u32 pdo = port->source_caps[i]; | |
743 | enum pd_pdo_type type = pdo_type(pdo); | |
744 | char msg[64]; | |
745 | ||
746 | switch (type) { | |
747 | case PDO_TYPE_FIXED: | |
748 | scnprintf(msg, sizeof(msg), | |
749 | "%u mV, %u mA [%s%s%s%s%s%s]", | |
750 | pdo_fixed_voltage(pdo), | |
751 | pdo_max_current(pdo), | |
752 | (pdo & PDO_FIXED_DUAL_ROLE) ? | |
753 | "R" : "", | |
754 | (pdo & PDO_FIXED_SUSPEND) ? | |
755 | "S" : "", | |
756 | (pdo & PDO_FIXED_HIGHER_CAP) ? | |
757 | "H" : "", | |
758 | (pdo & PDO_FIXED_USB_COMM) ? | |
759 | "U" : "", | |
760 | (pdo & PDO_FIXED_DATA_SWAP) ? | |
761 | "D" : "", | |
762 | (pdo & PDO_FIXED_EXTPOWER) ? | |
763 | "E" : ""); | |
764 | break; | |
765 | case PDO_TYPE_VAR: | |
766 | scnprintf(msg, sizeof(msg), | |
767 | "%u-%u mV, %u mA", | |
768 | pdo_min_voltage(pdo), | |
769 | pdo_max_voltage(pdo), | |
770 | pdo_max_current(pdo)); | |
771 | break; | |
772 | case PDO_TYPE_BATT: | |
773 | scnprintf(msg, sizeof(msg), | |
774 | "%u-%u mV, %u mW", | |
775 | pdo_min_voltage(pdo), | |
776 | pdo_max_voltage(pdo), | |
777 | pdo_max_power(pdo)); | |
778 | break; | |
2eadc33f AT |
779 | case PDO_TYPE_APDO: |
780 | if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) | |
781 | scnprintf(msg, sizeof(msg), | |
782 | "%u-%u mV, %u mA", | |
783 | pdo_pps_apdo_min_voltage(pdo), | |
784 | pdo_pps_apdo_max_voltage(pdo), | |
785 | pdo_pps_apdo_max_current(pdo)); | |
786 | else | |
787 | strcpy(msg, "undefined APDO"); | |
788 | break; | |
f0690a25 GR |
789 | default: |
790 | strcpy(msg, "undefined"); | |
791 | break; | |
792 | } | |
793 | tcpm_log(port, " PDO %d: type %d, %s", | |
794 | i, type, msg); | |
795 | } | |
796 | } | |
797 | ||
9e902c59 | 798 | static int tcpm_debug_show(struct seq_file *s, void *v) |
f0690a25 | 799 | { |
1ad71585 | 800 | struct tcpm_port *port = s->private; |
f0690a25 GR |
801 | int tail; |
802 | ||
803 | mutex_lock(&port->logbuffer_lock); | |
804 | tail = port->logbuffer_tail; | |
805 | while (tail != port->logbuffer_head) { | |
806 | seq_printf(s, "%s\n", port->logbuffer[tail]); | |
807 | tail = (tail + 1) % LOG_BUFFER_ENTRIES; | |
808 | } | |
809 | if (!seq_has_overflowed(s)) | |
810 | port->logbuffer_tail = tail; | |
811 | mutex_unlock(&port->logbuffer_lock); | |
812 | ||
813 | return 0; | |
814 | } | |
9e902c59 | 815 | DEFINE_SHOW_ATTRIBUTE(tcpm_debug); |
f0690a25 | 816 | |
a941fc39 | 817 | static void tcpm_debugfs_init(struct tcpm_port *port) |
f0690a25 | 818 | { |
9f4bc2ed | 819 | char name[NAME_MAX]; |
f0690a25 | 820 | |
9f4bc2ed HG |
821 | mutex_init(&port->logbuffer_lock); |
822 | snprintf(name, NAME_MAX, "tcpm-%s", dev_name(port->dev)); | |
153e140d GKH |
823 | port->dentry = debugfs_create_dir(name, usb_debug_root); |
824 | debugfs_create_file("log", S_IFREG | 0444, port->dentry, port, | |
825 | &tcpm_debug_fops); | |
f0690a25 GR |
826 | } |
827 | ||
828 | static void tcpm_debugfs_exit(struct tcpm_port *port) | |
829 | { | |
fd5da3e2 LJ |
830 | int i; |
831 | ||
832 | mutex_lock(&port->logbuffer_lock); | |
833 | for (i = 0; i < LOG_BUFFER_ENTRIES; i++) { | |
834 | kfree(port->logbuffer[i]); | |
835 | port->logbuffer[i] = NULL; | |
836 | } | |
837 | mutex_unlock(&port->logbuffer_lock); | |
838 | ||
f0690a25 GR |
839 | debugfs_remove(port->dentry); |
840 | } | |
841 | ||
842 | #else | |
843 | ||
e79e0125 | 844 | __printf(2, 3) |
f0690a25 | 845 | static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { } |
e79e0125 | 846 | __printf(2, 3) |
f0690a25 GR |
847 | static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { } |
848 | static void tcpm_log_source_caps(struct tcpm_port *port) { } | |
a941fc39 | 849 | static void tcpm_debugfs_init(const struct tcpm_port *port) { } |
f0690a25 GR |
850 | static void tcpm_debugfs_exit(const struct tcpm_port *port) { } |
851 | ||
852 | #endif | |
853 | ||
0908c5ac KT |
854 | static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc) |
855 | { | |
856 | tcpm_log(port, "cc:=%d", cc); | |
857 | port->cc_req = cc; | |
858 | port->tcpc->set_cc(port->tcpc, cc); | |
859 | } | |
860 | ||
dea6f87e BJS |
861 | static int tcpm_enable_auto_vbus_discharge(struct tcpm_port *port, bool enable) |
862 | { | |
863 | int ret = 0; | |
864 | ||
865 | if (port->tcpc->enable_auto_vbus_discharge) { | |
866 | ret = port->tcpc->enable_auto_vbus_discharge(port->tcpc, enable); | |
867 | tcpm_log_force(port, "%s vbus discharge ret:%d", enable ? "enable" : "disable", | |
868 | ret); | |
869 | if (!ret) | |
870 | port->auto_vbus_discharge_enabled = enable; | |
871 | } | |
872 | ||
873 | return ret; | |
874 | } | |
875 | ||
59d4d06c BJS |
876 | static void tcpm_apply_rc(struct tcpm_port *port) |
877 | { | |
878 | /* | |
879 | * TCPCI: Move to APPLY_RC state to prevent disconnect during PR_SWAP | |
880 | * when Vbus auto discharge on disconnect is enabled. | |
881 | */ | |
882 | if (port->tcpc->enable_auto_vbus_discharge && port->tcpc->apply_rc) { | |
883 | tcpm_log(port, "Apply_RC"); | |
884 | port->tcpc->apply_rc(port->tcpc, port->cc_req, port->polarity); | |
885 | tcpm_enable_auto_vbus_discharge(port, false); | |
886 | } | |
887 | } | |
888 | ||
0908c5ac KT |
889 | /* |
890 | * Determine RP value to set based on maximum current supported | |
891 | * by a port if configured as source. | |
892 | * Returns CC value to report to link partner. | |
893 | */ | |
894 | static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port) | |
895 | { | |
896 | const u32 *src_pdo = port->src_pdo; | |
897 | int nr_pdo = port->nr_src_pdo; | |
898 | int i; | |
899 | ||
e9e6e164 KT |
900 | if (!port->pd_supported) |
901 | return port->src_rp; | |
902 | ||
0908c5ac KT |
903 | /* |
904 | * Search for first entry with matching voltage. | |
905 | * It should report the maximum supported current. | |
906 | */ | |
907 | for (i = 0; i < nr_pdo; i++) { | |
908 | const u32 pdo = src_pdo[i]; | |
909 | ||
910 | if (pdo_type(pdo) == PDO_TYPE_FIXED && | |
911 | pdo_fixed_voltage(pdo) == 5000) { | |
912 | unsigned int curr = pdo_max_current(pdo); | |
913 | ||
914 | if (curr >= 3000) | |
915 | return TYPEC_CC_RP_3_0; | |
916 | else if (curr >= 1500) | |
917 | return TYPEC_CC_RP_1_5; | |
918 | return TYPEC_CC_RP_DEF; | |
919 | } | |
920 | } | |
921 | ||
922 | return TYPEC_CC_RP_DEF; | |
923 | } | |
924 | ||
493d0856 | 925 | static void tcpm_ams_finish(struct tcpm_port *port) |
0908c5ac | 926 | { |
0908c5ac KT |
927 | tcpm_log(port, "AMS %s finished", tcpm_ams_str[port->ams]); |
928 | ||
929 | if (port->pd_capable && port->pwr_role == TYPEC_SOURCE) { | |
930 | if (port->negotiated_rev >= PD_REV30) | |
931 | tcpm_set_cc(port, SINK_TX_OK); | |
932 | else | |
933 | tcpm_set_cc(port, SINK_TX_NG); | |
934 | } else if (port->pwr_role == TYPEC_SOURCE) { | |
935 | tcpm_set_cc(port, tcpm_rp_cc(port)); | |
936 | } | |
937 | ||
938 | port->in_ams = false; | |
939 | port->ams = NONE_AMS; | |
0908c5ac KT |
940 | } |
941 | ||
f0690a25 | 942 | static int tcpm_pd_transmit(struct tcpm_port *port, |
e03f6fef | 943 | enum tcpm_transmit_type tx_sop_type, |
f0690a25 GR |
944 | const struct pd_message *msg) |
945 | { | |
946 | unsigned long timeout; | |
947 | int ret; | |
e03f6fef RB |
948 | unsigned int negotiated_rev; |
949 | ||
950 | switch (tx_sop_type) { | |
951 | case TCPC_TX_SOP_PRIME: | |
952 | negotiated_rev = port->negotiated_rev_prime; | |
953 | break; | |
954 | case TCPC_TX_SOP: | |
955 | default: | |
956 | negotiated_rev = port->negotiated_rev; | |
957 | break; | |
958 | } | |
f0690a25 GR |
959 | |
960 | if (msg) | |
961 | tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header)); | |
962 | else | |
e03f6fef | 963 | tcpm_log(port, "PD TX, type: %#x", tx_sop_type); |
f0690a25 GR |
964 | |
965 | reinit_completion(&port->tx_complete); | |
e03f6fef | 966 | ret = port->tcpc->pd_transmit(port->tcpc, tx_sop_type, msg, negotiated_rev); |
f0690a25 GR |
967 | if (ret < 0) |
968 | return ret; | |
969 | ||
970 | mutex_unlock(&port->lock); | |
971 | timeout = wait_for_completion_timeout(&port->tx_complete, | |
972 | msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT)); | |
973 | mutex_lock(&port->lock); | |
974 | if (!timeout) | |
975 | return -ETIMEDOUT; | |
976 | ||
977 | switch (port->tx_status) { | |
978 | case TCPC_TX_SUCCESS: | |
e03f6fef RB |
979 | switch (tx_sop_type) { |
980 | case TCPC_TX_SOP_PRIME: | |
981 | port->message_id_prime = (port->message_id_prime + 1) & | |
982 | PD_HEADER_ID_MASK; | |
983 | break; | |
984 | case TCPC_TX_SOP: | |
985 | default: | |
986 | port->message_id = (port->message_id + 1) & | |
987 | PD_HEADER_ID_MASK; | |
988 | break; | |
989 | } | |
0908c5ac KT |
990 | /* |
991 | * USB PD rev 2.0, 8.3.2.2.1: | |
992 | * USB PD rev 3.0, 8.3.2.1.3: | |
993 | * "... Note that every AMS is Interruptible until the first | |
994 | * Message in the sequence has been successfully sent (GoodCRC | |
995 | * Message received)." | |
996 | */ | |
997 | if (port->ams != NONE_AMS) | |
998 | port->in_ams = true; | |
999 | break; | |
f0690a25 | 1000 | case TCPC_TX_DISCARDED: |
0908c5ac KT |
1001 | ret = -EAGAIN; |
1002 | break; | |
f0690a25 GR |
1003 | case TCPC_TX_FAILED: |
1004 | default: | |
0908c5ac KT |
1005 | ret = -EIO; |
1006 | break; | |
f0690a25 | 1007 | } |
0908c5ac KT |
1008 | |
1009 | /* Some AMS don't expect responses. Finish them here. */ | |
1010 | if (port->ams == ATTENTION || port->ams == SOURCE_ALERT) | |
1011 | tcpm_ams_finish(port); | |
1012 | ||
1013 | return ret; | |
f0690a25 GR |
1014 | } |
1015 | ||
1016 | void tcpm_pd_transmit_complete(struct tcpm_port *port, | |
1017 | enum tcpm_transmit_status status) | |
1018 | { | |
1019 | tcpm_log(port, "PD TX complete, status: %u", status); | |
1020 | port->tx_status = status; | |
1021 | complete(&port->tx_complete); | |
1022 | } | |
1023 | EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete); | |
1024 | ||
e9576fe8 | 1025 | static int tcpm_mux_set(struct tcpm_port *port, int state, |
2000016c HG |
1026 | enum usb_role usb_role, |
1027 | enum typec_orientation orientation) | |
f0690a25 | 1028 | { |
2000016c | 1029 | int ret; |
f0690a25 | 1030 | |
e9576fe8 HK |
1031 | tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d", |
1032 | state, usb_role, orientation); | |
f0690a25 | 1033 | |
2000016c HG |
1034 | ret = typec_set_orientation(port->typec_port, orientation); |
1035 | if (ret) | |
1036 | return ret; | |
f0690a25 | 1037 | |
2000016c HG |
1038 | if (port->role_sw) { |
1039 | ret = usb_role_switch_set_role(port->role_sw, usb_role); | |
1040 | if (ret) | |
1041 | return ret; | |
1042 | } | |
1043 | ||
e9576fe8 | 1044 | return typec_set_mode(port->typec_port, state); |
f0690a25 GR |
1045 | } |
1046 | ||
1047 | static int tcpm_set_polarity(struct tcpm_port *port, | |
1048 | enum typec_cc_polarity polarity) | |
1049 | { | |
1050 | int ret; | |
1051 | ||
1052 | tcpm_log(port, "polarity %d", polarity); | |
1053 | ||
1054 | ret = port->tcpc->set_polarity(port->tcpc, polarity); | |
1055 | if (ret < 0) | |
1056 | return ret; | |
1057 | ||
1058 | port->polarity = polarity; | |
1059 | ||
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | static int tcpm_set_vconn(struct tcpm_port *port, bool enable) | |
1064 | { | |
1065 | int ret; | |
1066 | ||
1067 | tcpm_log(port, "vconn:=%d", enable); | |
1068 | ||
1069 | ret = port->tcpc->set_vconn(port->tcpc, enable); | |
1070 | if (!ret) { | |
1071 | port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK; | |
1072 | typec_set_vconn_role(port->typec_port, port->vconn_role); | |
1073 | } | |
1074 | ||
1075 | return ret; | |
1076 | } | |
1077 | ||
1078 | static u32 tcpm_get_current_limit(struct tcpm_port *port) | |
1079 | { | |
1080 | enum typec_cc_status cc; | |
1081 | u32 limit; | |
1082 | ||
1083 | cc = port->polarity ? port->cc2 : port->cc1; | |
1084 | switch (cc) { | |
1085 | case TYPEC_CC_RP_1_5: | |
1086 | limit = 1500; | |
1087 | break; | |
1088 | case TYPEC_CC_RP_3_0: | |
1089 | limit = 3000; | |
1090 | break; | |
1091 | case TYPEC_CC_RP_DEF: | |
1092 | default: | |
ea62cfc7 HG |
1093 | if (port->tcpc->get_current_limit) |
1094 | limit = port->tcpc->get_current_limit(port->tcpc); | |
1095 | else | |
1096 | limit = 0; | |
f0690a25 GR |
1097 | break; |
1098 | } | |
1099 | ||
1100 | return limit; | |
1101 | } | |
1102 | ||
1103 | static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv) | |
1104 | { | |
1105 | int ret = -EOPNOTSUPP; | |
1106 | ||
1107 | tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma); | |
1108 | ||
146971e6 HG |
1109 | port->supply_voltage = mv; |
1110 | port->current_limit = max_ma; | |
86629e09 | 1111 | power_supply_changed(port->psy); |
146971e6 | 1112 | |
f0690a25 GR |
1113 | if (port->tcpc->set_current_limit) |
1114 | ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv); | |
1115 | ||
1116 | return ret; | |
1117 | } | |
1118 | ||
f0690a25 GR |
1119 | static int tcpm_set_attached_state(struct tcpm_port *port, bool attached) |
1120 | { | |
1121 | return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role, | |
1122 | port->data_role); | |
1123 | } | |
1124 | ||
1125 | static int tcpm_set_roles(struct tcpm_port *port, bool attached, | |
1126 | enum typec_role role, enum typec_data_role data) | |
1127 | { | |
2000016c | 1128 | enum typec_orientation orientation; |
c6962c29 | 1129 | enum usb_role usb_role; |
f0690a25 GR |
1130 | int ret; |
1131 | ||
2000016c HG |
1132 | if (port->polarity == TYPEC_POLARITY_CC1) |
1133 | orientation = TYPEC_ORIENTATION_NORMAL; | |
1134 | else | |
1135 | orientation = TYPEC_ORIENTATION_REVERSE; | |
1136 | ||
6ecc632d LJ |
1137 | if (port->typec_caps.data == TYPEC_PORT_DRD) { |
1138 | if (data == TYPEC_HOST) | |
1139 | usb_role = USB_ROLE_HOST; | |
1140 | else | |
1141 | usb_role = USB_ROLE_DEVICE; | |
1142 | } else if (port->typec_caps.data == TYPEC_PORT_DFP) { | |
1143 | if (data == TYPEC_HOST) { | |
1144 | if (role == TYPEC_SOURCE) | |
1145 | usb_role = USB_ROLE_HOST; | |
1146 | else | |
1147 | usb_role = USB_ROLE_NONE; | |
1148 | } else { | |
1149 | return -ENOTSUPP; | |
1150 | } | |
1151 | } else { | |
1152 | if (data == TYPEC_DEVICE) { | |
1153 | if (role == TYPEC_SINK) | |
1154 | usb_role = USB_ROLE_DEVICE; | |
1155 | else | |
1156 | usb_role = USB_ROLE_NONE; | |
1157 | } else { | |
1158 | return -ENOTSUPP; | |
1159 | } | |
1160 | } | |
c6962c29 | 1161 | |
e9576fe8 | 1162 | ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation); |
f0690a25 GR |
1163 | if (ret < 0) |
1164 | return ret; | |
1165 | ||
1166 | ret = port->tcpc->set_roles(port->tcpc, attached, role, data); | |
1167 | if (ret < 0) | |
1168 | return ret; | |
1169 | ||
ac92ea6b MF |
1170 | if (port->tcpc->set_orientation) { |
1171 | ret = port->tcpc->set_orientation(port->tcpc, orientation); | |
1172 | if (ret < 0) | |
1173 | return ret; | |
1174 | } | |
1175 | ||
f0690a25 GR |
1176 | port->pwr_role = role; |
1177 | port->data_role = data; | |
1178 | typec_set_data_role(port->typec_port, data); | |
1179 | typec_set_pwr_role(port->typec_port, role); | |
1180 | ||
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role) | |
1185 | { | |
1186 | int ret; | |
1187 | ||
1188 | ret = port->tcpc->set_roles(port->tcpc, true, role, | |
1189 | port->data_role); | |
1190 | if (ret < 0) | |
1191 | return ret; | |
1192 | ||
1193 | port->pwr_role = role; | |
1194 | typec_set_pwr_role(port->typec_port, role); | |
1195 | ||
1196 | return 0; | |
1197 | } | |
1198 | ||
f75a1025 KT |
1199 | /* |
1200 | * Transform the PDO to be compliant to PD rev2.0. | |
1201 | * Return 0 if the PDO type is not defined in PD rev2.0. | |
1202 | * Otherwise, return the converted PDO. | |
1203 | */ | |
1204 | static u32 tcpm_forge_legacy_pdo(struct tcpm_port *port, u32 pdo, enum typec_role role) | |
1205 | { | |
1206 | switch (pdo_type(pdo)) { | |
1207 | case PDO_TYPE_FIXED: | |
1208 | if (role == TYPEC_SINK) | |
1209 | return pdo & ~PDO_FIXED_FRS_CURR_MASK; | |
1210 | else | |
1211 | return pdo & ~PDO_FIXED_UNCHUNK_EXT; | |
1212 | case PDO_TYPE_VAR: | |
1213 | case PDO_TYPE_BATT: | |
1214 | return pdo; | |
1215 | case PDO_TYPE_APDO: | |
1216 | default: | |
1217 | return 0; | |
1218 | } | |
1219 | } | |
1220 | ||
f0690a25 GR |
1221 | static int tcpm_pd_send_source_caps(struct tcpm_port *port) |
1222 | { | |
1223 | struct pd_message msg; | |
f75a1025 KT |
1224 | u32 pdo; |
1225 | unsigned int i, nr_pdo = 0; | |
f0690a25 GR |
1226 | |
1227 | memset(&msg, 0, sizeof(msg)); | |
f75a1025 KT |
1228 | |
1229 | for (i = 0; i < port->nr_src_pdo; i++) { | |
1230 | if (port->negotiated_rev >= PD_REV30) { | |
1231 | msg.payload[nr_pdo++] = cpu_to_le32(port->src_pdo[i]); | |
1232 | } else { | |
1233 | pdo = tcpm_forge_legacy_pdo(port, port->src_pdo[i], TYPEC_SOURCE); | |
1234 | if (pdo) | |
1235 | msg.payload[nr_pdo++] = cpu_to_le32(pdo); | |
1236 | } | |
1237 | } | |
1238 | ||
1239 | if (!nr_pdo) { | |
f0690a25 GR |
1240 | /* No source capabilities defined, sink only */ |
1241 | msg.header = PD_HEADER_LE(PD_CTRL_REJECT, | |
1242 | port->pwr_role, | |
1243 | port->data_role, | |
2eadc33f | 1244 | port->negotiated_rev, |
f0690a25 GR |
1245 | port->message_id, 0); |
1246 | } else { | |
1247 | msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP, | |
1248 | port->pwr_role, | |
1249 | port->data_role, | |
2eadc33f | 1250 | port->negotiated_rev, |
f0690a25 | 1251 | port->message_id, |
f75a1025 | 1252 | nr_pdo); |
f0690a25 | 1253 | } |
f0690a25 GR |
1254 | |
1255 | return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); | |
1256 | } | |
1257 | ||
1258 | static int tcpm_pd_send_sink_caps(struct tcpm_port *port) | |
1259 | { | |
1260 | struct pd_message msg; | |
f75a1025 KT |
1261 | u32 pdo; |
1262 | unsigned int i, nr_pdo = 0; | |
f0690a25 GR |
1263 | |
1264 | memset(&msg, 0, sizeof(msg)); | |
f75a1025 KT |
1265 | |
1266 | for (i = 0; i < port->nr_snk_pdo; i++) { | |
1267 | if (port->negotiated_rev >= PD_REV30) { | |
1268 | msg.payload[nr_pdo++] = cpu_to_le32(port->snk_pdo[i]); | |
1269 | } else { | |
1270 | pdo = tcpm_forge_legacy_pdo(port, port->snk_pdo[i], TYPEC_SINK); | |
1271 | if (pdo) | |
1272 | msg.payload[nr_pdo++] = cpu_to_le32(pdo); | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | if (!nr_pdo) { | |
f0690a25 GR |
1277 | /* No sink capabilities defined, source only */ |
1278 | msg.header = PD_HEADER_LE(PD_CTRL_REJECT, | |
1279 | port->pwr_role, | |
1280 | port->data_role, | |
2eadc33f | 1281 | port->negotiated_rev, |
f0690a25 GR |
1282 | port->message_id, 0); |
1283 | } else { | |
1284 | msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP, | |
1285 | port->pwr_role, | |
1286 | port->data_role, | |
2eadc33f | 1287 | port->negotiated_rev, |
f0690a25 | 1288 | port->message_id, |
f75a1025 | 1289 | nr_pdo); |
f0690a25 | 1290 | } |
f0690a25 GR |
1291 | |
1292 | return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); | |
1293 | } | |
1294 | ||
3ed8e1c2 BJS |
1295 | static void mod_tcpm_delayed_work(struct tcpm_port *port, unsigned int delay_ms) |
1296 | { | |
1297 | if (delay_ms) { | |
1298 | hrtimer_start(&port->state_machine_timer, ms_to_ktime(delay_ms), HRTIMER_MODE_REL); | |
1299 | } else { | |
1300 | hrtimer_cancel(&port->state_machine_timer); | |
1301 | kthread_queue_work(port->wq, &port->state_machine); | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | static void mod_vdm_delayed_work(struct tcpm_port *port, unsigned int delay_ms) | |
1306 | { | |
1307 | if (delay_ms) { | |
1308 | hrtimer_start(&port->vdm_state_machine_timer, ms_to_ktime(delay_ms), | |
1309 | HRTIMER_MODE_REL); | |
1310 | } else { | |
1311 | hrtimer_cancel(&port->vdm_state_machine_timer); | |
1312 | kthread_queue_work(port->wq, &port->vdm_state_machine); | |
1313 | } | |
1314 | } | |
1315 | ||
8dc4bd07 BJS |
1316 | static void mod_enable_frs_delayed_work(struct tcpm_port *port, unsigned int delay_ms) |
1317 | { | |
1318 | if (delay_ms) { | |
1319 | hrtimer_start(&port->enable_frs_timer, ms_to_ktime(delay_ms), HRTIMER_MODE_REL); | |
1320 | } else { | |
1321 | hrtimer_cancel(&port->enable_frs_timer); | |
1322 | kthread_queue_work(port->wq, &port->enable_frs); | |
1323 | } | |
1324 | } | |
1325 | ||
c34e85fa KT |
1326 | static void mod_send_discover_delayed_work(struct tcpm_port *port, unsigned int delay_ms) |
1327 | { | |
1328 | if (delay_ms) { | |
1329 | hrtimer_start(&port->send_discover_timer, ms_to_ktime(delay_ms), HRTIMER_MODE_REL); | |
1330 | } else { | |
1331 | hrtimer_cancel(&port->send_discover_timer); | |
1332 | kthread_queue_work(port->wq, &port->send_discover_work); | |
1333 | } | |
1334 | } | |
1335 | ||
f0690a25 GR |
1336 | static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state, |
1337 | unsigned int delay_ms) | |
1338 | { | |
1339 | if (delay_ms) { | |
0908c5ac KT |
1340 | tcpm_log(port, "pending state change %s -> %s @ %u ms [%s %s]", |
1341 | tcpm_states[port->state], tcpm_states[state], delay_ms, | |
1342 | pd_rev[port->negotiated_rev], tcpm_ams_str[port->ams]); | |
f0690a25 | 1343 | port->delayed_state = state; |
3ed8e1c2 BJS |
1344 | mod_tcpm_delayed_work(port, delay_ms); |
1345 | port->delayed_runtime = ktime_add(ktime_get(), ms_to_ktime(delay_ms)); | |
f0690a25 GR |
1346 | port->delay_ms = delay_ms; |
1347 | } else { | |
0908c5ac KT |
1348 | tcpm_log(port, "state change %s -> %s [%s %s]", |
1349 | tcpm_states[port->state], tcpm_states[state], | |
1350 | pd_rev[port->negotiated_rev], tcpm_ams_str[port->ams]); | |
f0690a25 GR |
1351 | port->delayed_state = INVALID_STATE; |
1352 | port->prev_state = port->state; | |
1353 | port->state = state; | |
1354 | /* | |
1355 | * Don't re-queue the state machine work item if we're currently | |
1356 | * in the state machine and we're immediately changing states. | |
1357 | * tcpm_state_machine_work() will continue running the state | |
1358 | * machine. | |
1359 | */ | |
1360 | if (!port->state_machine_running) | |
3ed8e1c2 | 1361 | mod_tcpm_delayed_work(port, 0); |
f0690a25 GR |
1362 | } |
1363 | } | |
1364 | ||
1365 | static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state, | |
1366 | unsigned int delay_ms) | |
1367 | { | |
1368 | if (port->enter_state == port->state) | |
1369 | tcpm_set_state(port, state, delay_ms); | |
1370 | else | |
1371 | tcpm_log(port, | |
0908c5ac | 1372 | "skipped %sstate change %s -> %s [%u ms], context state %s [%s %s]", |
f0690a25 GR |
1373 | delay_ms ? "delayed " : "", |
1374 | tcpm_states[port->state], tcpm_states[state], | |
0908c5ac KT |
1375 | delay_ms, tcpm_states[port->enter_state], |
1376 | pd_rev[port->negotiated_rev], tcpm_ams_str[port->ams]); | |
f0690a25 GR |
1377 | } |
1378 | ||
1379 | static void tcpm_queue_message(struct tcpm_port *port, | |
1380 | enum pd_msg_request message) | |
1381 | { | |
1382 | port->queued_message = message; | |
3ed8e1c2 | 1383 | mod_tcpm_delayed_work(port, 0); |
f0690a25 GR |
1384 | } |
1385 | ||
0908c5ac KT |
1386 | static bool tcpm_vdm_ams(struct tcpm_port *port) |
1387 | { | |
1388 | switch (port->ams) { | |
1389 | case DISCOVER_IDENTITY: | |
1390 | case SOURCE_STARTUP_CABLE_PLUG_DISCOVER_IDENTITY: | |
1391 | case DISCOVER_SVIDS: | |
1392 | case DISCOVER_MODES: | |
1393 | case DFP_TO_UFP_ENTER_MODE: | |
1394 | case DFP_TO_UFP_EXIT_MODE: | |
1395 | case DFP_TO_CABLE_PLUG_ENTER_MODE: | |
1396 | case DFP_TO_CABLE_PLUG_EXIT_MODE: | |
1397 | case ATTENTION: | |
1398 | case UNSTRUCTURED_VDMS: | |
1399 | case STRUCTURED_VDMS: | |
1400 | break; | |
1401 | default: | |
1402 | return false; | |
1403 | } | |
1404 | ||
1405 | return true; | |
1406 | } | |
1407 | ||
1408 | static bool tcpm_ams_interruptible(struct tcpm_port *port) | |
1409 | { | |
1410 | switch (port->ams) { | |
1411 | /* Interruptible AMS */ | |
1412 | case NONE_AMS: | |
1413 | case SECURITY: | |
1414 | case FIRMWARE_UPDATE: | |
1415 | case DISCOVER_IDENTITY: | |
1416 | case SOURCE_STARTUP_CABLE_PLUG_DISCOVER_IDENTITY: | |
1417 | case DISCOVER_SVIDS: | |
1418 | case DISCOVER_MODES: | |
1419 | case DFP_TO_UFP_ENTER_MODE: | |
1420 | case DFP_TO_UFP_EXIT_MODE: | |
1421 | case DFP_TO_CABLE_PLUG_ENTER_MODE: | |
1422 | case DFP_TO_CABLE_PLUG_EXIT_MODE: | |
1423 | case UNSTRUCTURED_VDMS: | |
1424 | case STRUCTURED_VDMS: | |
1425 | case COUNTRY_INFO: | |
1426 | case COUNTRY_CODES: | |
1427 | break; | |
1428 | /* Non-Interruptible AMS */ | |
1429 | default: | |
1430 | if (port->in_ams) | |
1431 | return false; | |
1432 | break; | |
1433 | } | |
1434 | ||
1435 | return true; | |
1436 | } | |
1437 | ||
1438 | static int tcpm_ams_start(struct tcpm_port *port, enum tcpm_ams ams) | |
1439 | { | |
1440 | int ret = 0; | |
1441 | ||
1442 | tcpm_log(port, "AMS %s start", tcpm_ams_str[ams]); | |
1443 | ||
8dea75e1 KT |
1444 | if (!tcpm_ams_interruptible(port) && |
1445 | !(ams == HARD_RESET || ams == SOFT_RESET_AMS)) { | |
0908c5ac KT |
1446 | port->upcoming_state = INVALID_STATE; |
1447 | tcpm_log(port, "AMS %s not interruptible, aborting", | |
1448 | tcpm_ams_str[port->ams]); | |
1449 | return -EAGAIN; | |
1450 | } | |
1451 | ||
1452 | if (port->pwr_role == TYPEC_SOURCE) { | |
1453 | enum typec_cc_status cc_req = port->cc_req; | |
1454 | ||
1455 | port->ams = ams; | |
1456 | ||
1457 | if (ams == HARD_RESET) { | |
1458 | tcpm_set_cc(port, tcpm_rp_cc(port)); | |
1459 | tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL); | |
1460 | tcpm_set_state(port, HARD_RESET_START, 0); | |
1461 | return ret; | |
1462 | } else if (ams == SOFT_RESET_AMS) { | |
8dea75e1 | 1463 | if (!port->explicit_contract) |
0908c5ac | 1464 | tcpm_set_cc(port, tcpm_rp_cc(port)); |
8dea75e1 KT |
1465 | tcpm_set_state(port, SOFT_RESET_SEND, 0); |
1466 | return ret; | |
0908c5ac KT |
1467 | } else if (tcpm_vdm_ams(port)) { |
1468 | /* tSinkTx is enforced in vdm_run_state_machine */ | |
1469 | if (port->negotiated_rev >= PD_REV30) | |
1470 | tcpm_set_cc(port, SINK_TX_NG); | |
1471 | return ret; | |
1472 | } | |
1473 | ||
1474 | if (port->negotiated_rev >= PD_REV30) | |
1475 | tcpm_set_cc(port, SINK_TX_NG); | |
1476 | ||
1477 | switch (port->state) { | |
1478 | case SRC_READY: | |
1479 | case SRC_STARTUP: | |
1480 | case SRC_SOFT_RESET_WAIT_SNK_TX: | |
1481 | case SOFT_RESET: | |
1482 | case SOFT_RESET_SEND: | |
1483 | if (port->negotiated_rev >= PD_REV30) | |
1484 | tcpm_set_state(port, AMS_START, | |
1485 | cc_req == SINK_TX_OK ? | |
1486 | PD_T_SINK_TX : 0); | |
1487 | else | |
1488 | tcpm_set_state(port, AMS_START, 0); | |
1489 | break; | |
1490 | default: | |
1491 | if (port->negotiated_rev >= PD_REV30) | |
1492 | tcpm_set_state(port, SRC_READY, | |
1493 | cc_req == SINK_TX_OK ? | |
1494 | PD_T_SINK_TX : 0); | |
1495 | else | |
1496 | tcpm_set_state(port, SRC_READY, 0); | |
1497 | break; | |
1498 | } | |
1499 | } else { | |
1500 | if (port->negotiated_rev >= PD_REV30 && | |
1501 | !tcpm_sink_tx_ok(port) && | |
1502 | ams != SOFT_RESET_AMS && | |
1503 | ams != HARD_RESET) { | |
1504 | port->upcoming_state = INVALID_STATE; | |
1505 | tcpm_log(port, "Sink TX No Go"); | |
1506 | return -EAGAIN; | |
1507 | } | |
1508 | ||
1509 | port->ams = ams; | |
1510 | ||
1511 | if (ams == HARD_RESET) { | |
1512 | tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL); | |
1513 | tcpm_set_state(port, HARD_RESET_START, 0); | |
1514 | return ret; | |
1515 | } else if (tcpm_vdm_ams(port)) { | |
1516 | return ret; | |
1517 | } | |
1518 | ||
1519 | if (port->state == SNK_READY || | |
1520 | port->state == SNK_SOFT_RESET) | |
1521 | tcpm_set_state(port, AMS_START, 0); | |
1522 | else | |
1523 | tcpm_set_state(port, SNK_READY, 0); | |
1524 | } | |
1525 | ||
1526 | return ret; | |
1527 | } | |
1528 | ||
f0690a25 GR |
1529 | /* |
1530 | * VDM/VDO handling functions | |
1531 | */ | |
1532 | static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header, | |
fb7ff25a | 1533 | const u32 *data, int cnt, enum tcpm_transmit_type tx_sop_type) |
f0690a25 | 1534 | { |
abfc4fa2 XY |
1535 | u32 vdo_hdr = port->vdo_data[0]; |
1536 | ||
03eafcfb HG |
1537 | WARN_ON(!mutex_is_locked(&port->lock)); |
1538 | ||
abfc4fa2 XY |
1539 | /* If is sending discover_identity, handle received message first */ |
1540 | if (PD_VDO_SVDM(vdo_hdr) && PD_VDO_CMD(vdo_hdr) == CMD_DISCOVER_IDENT) { | |
fb7ff25a RB |
1541 | if (tx_sop_type == TCPC_TX_SOP_PRIME) |
1542 | port->send_discover_prime = true; | |
1543 | else | |
1544 | port->send_discover = true; | |
abfc4fa2 XY |
1545 | mod_send_discover_delayed_work(port, SEND_DISCOVER_RETRY_MS); |
1546 | } else { | |
1547 | /* Make sure we are not still processing a previous VDM packet */ | |
1548 | WARN_ON(port->vdm_state > VDM_STATE_DONE); | |
1549 | } | |
754498c1 | 1550 | |
f0690a25 GR |
1551 | port->vdo_count = cnt + 1; |
1552 | port->vdo_data[0] = header; | |
1553 | memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt); | |
1554 | /* Set ready, vdm state machine will actually send */ | |
1555 | port->vdm_retries = 0; | |
1556 | port->vdm_state = VDM_STATE_READY; | |
ef52b4a9 | 1557 | port->vdm_sm_running = true; |
5f2b8d87 | 1558 | |
fb7ff25a RB |
1559 | port->tx_sop_type = tx_sop_type; |
1560 | ||
3ed8e1c2 | 1561 | mod_vdm_delayed_work(port, 0); |
f0690a25 GR |
1562 | } |
1563 | ||
03eafcfb | 1564 | static void tcpm_queue_vdm_unlocked(struct tcpm_port *port, const u32 header, |
7e7877c5 | 1565 | const u32 *data, int cnt, enum tcpm_transmit_type tx_sop_type) |
03eafcfb HG |
1566 | { |
1567 | mutex_lock(&port->lock); | |
fb7ff25a | 1568 | tcpm_queue_vdm(port, header, data, cnt, TCPC_TX_SOP); |
03eafcfb HG |
1569 | mutex_unlock(&port->lock); |
1570 | } | |
1571 | ||
8afe9a35 | 1572 | static void svdm_consume_identity(struct tcpm_port *port, const u32 *p, int cnt) |
f0690a25 | 1573 | { |
8afe9a35 HG |
1574 | u32 vdo = p[VDO_INDEX_IDH]; |
1575 | u32 product = p[VDO_INDEX_PRODUCT]; | |
f0690a25 GR |
1576 | |
1577 | memset(&port->mode_data, 0, sizeof(port->mode_data)); | |
1578 | ||
f0690a25 | 1579 | port->partner_ident.id_header = vdo; |
8afe9a35 | 1580 | port->partner_ident.cert_stat = p[VDO_INDEX_CSTAT]; |
f0690a25 GR |
1581 | port->partner_ident.product = product; |
1582 | ||
1583 | typec_partner_set_identity(port->partner); | |
1584 | ||
1585 | tcpm_log(port, "Identity: %04x:%04x.%04x", | |
1586 | PD_IDH_VID(vdo), | |
1587 | PD_PRODUCT_PID(product), product & 0xffff); | |
1588 | } | |
1589 | ||
fb7ff25a | 1590 | static void svdm_consume_identity_sop_prime(struct tcpm_port *port, const u32 *p, int cnt) |
f0690a25 | 1591 | { |
fb7ff25a RB |
1592 | u32 idh = p[VDO_INDEX_IDH]; |
1593 | u32 product = p[VDO_INDEX_PRODUCT]; | |
1594 | int svdm_version; | |
1595 | ||
1596 | /* | |
1597 | * Attempt to consume identity only if cable currently is not set | |
1598 | */ | |
1599 | if (!IS_ERR_OR_NULL(port->cable)) | |
1600 | goto register_plug; | |
1601 | ||
1602 | /* Reset cable identity */ | |
1603 | memset(&port->cable_ident, 0, sizeof(port->cable_ident)); | |
1604 | ||
1605 | /* Fill out id header, cert, product, cable VDO 1 */ | |
1606 | port->cable_ident.id_header = idh; | |
1607 | port->cable_ident.cert_stat = p[VDO_INDEX_CSTAT]; | |
1608 | port->cable_ident.product = product; | |
1609 | port->cable_ident.vdo[0] = p[VDO_INDEX_CABLE_1]; | |
1610 | ||
1611 | /* Fill out cable desc, infer svdm_version from pd revision */ | |
1612 | port->cable_desc.type = (enum typec_plug_type) (VDO_TYPEC_CABLE_TYPE(p[VDO_INDEX_CABLE_1]) + | |
1613 | USB_PLUG_TYPE_A); | |
1614 | port->cable_desc.active = PD_IDH_PTYPE(idh) == IDH_PTYPE_ACABLE ? 1 : 0; | |
1615 | /* Log PD Revision and additional cable VDO from negotiated revision */ | |
1616 | switch (port->negotiated_rev_prime) { | |
1617 | case PD_REV30: | |
1618 | port->cable_desc.pd_revision = 0x0300; | |
1619 | if (port->cable_desc.active) | |
1620 | port->cable_ident.vdo[1] = p[VDO_INDEX_CABLE_2]; | |
1621 | break; | |
1622 | case PD_REV20: | |
1623 | port->cable_desc.pd_revision = 0x0200; | |
1624 | break; | |
1625 | default: | |
1626 | port->cable_desc.pd_revision = 0x0200; | |
1627 | break; | |
1628 | } | |
1629 | port->cable_desc.identity = &port->cable_ident; | |
1630 | /* Register Cable, set identity and svdm_version */ | |
1631 | port->cable = typec_register_cable(port->typec_port, &port->cable_desc); | |
1632 | if (IS_ERR_OR_NULL(port->cable)) | |
1633 | return; | |
1634 | typec_cable_set_identity(port->cable); | |
1635 | /* Get SVDM version */ | |
1636 | svdm_version = PD_VDO_SVDM_VER(p[VDO_INDEX_HDR]); | |
1637 | typec_cable_set_svdm_version(port->cable, svdm_version); | |
1638 | ||
1639 | register_plug: | |
1640 | if (IS_ERR_OR_NULL(port->plug_prime)) { | |
1641 | port->plug_prime_desc.index = TYPEC_PLUG_SOP_P; | |
1642 | port->plug_prime = typec_register_plug(port->cable, | |
1643 | &port->plug_prime_desc); | |
1644 | } | |
1645 | } | |
1646 | ||
41d9d753 RB |
1647 | static bool svdm_consume_svids(struct tcpm_port *port, const u32 *p, int cnt, |
1648 | enum tcpm_transmit_type rx_sop_type) | |
f0690a25 | 1649 | { |
41d9d753 RB |
1650 | struct pd_mode_data *pmdata = rx_sop_type == TCPC_TX_SOP_PRIME ? |
1651 | &port->mode_data_prime : &port->mode_data; | |
f0690a25 GR |
1652 | int i; |
1653 | ||
1654 | for (i = 1; i < cnt; i++) { | |
f0690a25 GR |
1655 | u16 svid; |
1656 | ||
8afe9a35 | 1657 | svid = (p[i] >> 16) & 0xffff; |
f0690a25 GR |
1658 | if (!svid) |
1659 | return false; | |
1660 | ||
1661 | if (pmdata->nsvids >= SVID_DISCOVERY_MAX) | |
1662 | goto abort; | |
1663 | ||
1664 | pmdata->svids[pmdata->nsvids++] = svid; | |
1665 | tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid); | |
1666 | ||
8afe9a35 | 1667 | svid = p[i] & 0xffff; |
f0690a25 GR |
1668 | if (!svid) |
1669 | return false; | |
1670 | ||
1671 | if (pmdata->nsvids >= SVID_DISCOVERY_MAX) | |
1672 | goto abort; | |
1673 | ||
1674 | pmdata->svids[pmdata->nsvids++] = svid; | |
1675 | tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid); | |
1676 | } | |
dac3b192 FW |
1677 | |
1678 | /* | |
1679 | * PD3.0 Spec 6.4.4.3.2: The SVIDs are returned 2 per VDO (see Table | |
1680 | * 6-43), and can be returned maximum 6 VDOs per response (see Figure | |
1681 | * 6-19). If the Respondersupports 12 or more SVID then the Discover | |
1682 | * SVIDs Command Shall be executed multiple times until a Discover | |
1683 | * SVIDs VDO is returned ending either with a SVID value of 0x0000 in | |
1684 | * the last part of the last VDO or with a VDO containing two SVIDs | |
1685 | * with values of 0x0000. | |
1686 | * | |
1687 | * However, some odd dockers support SVIDs less than 12 but without | |
1688 | * 0x0000 in the last VDO, so we need to break the Discover SVIDs | |
1689 | * request and return false here. | |
1690 | */ | |
1691 | return cnt == 7; | |
f0690a25 GR |
1692 | abort: |
1693 | tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX); | |
1694 | return false; | |
1695 | } | |
1696 | ||
41d9d753 RB |
1697 | static void svdm_consume_modes(struct tcpm_port *port, const u32 *p, int cnt, |
1698 | enum tcpm_transmit_type rx_sop_type) | |
f0690a25 GR |
1699 | { |
1700 | struct pd_mode_data *pmdata = &port->mode_data; | |
1701 | struct typec_altmode_desc *paltmode; | |
f0690a25 GR |
1702 | int i; |
1703 | ||
41d9d753 RB |
1704 | switch (rx_sop_type) { |
1705 | case TCPC_TX_SOP_PRIME: | |
1706 | pmdata = &port->mode_data_prime; | |
1707 | if (pmdata->altmodes >= ARRAY_SIZE(port->plug_prime_altmode)) { | |
1708 | /* Already logged in svdm_consume_svids() */ | |
1709 | return; | |
1710 | } | |
1711 | break; | |
1712 | case TCPC_TX_SOP: | |
1713 | pmdata = &port->mode_data; | |
1714 | if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) { | |
1715 | /* Already logged in svdm_consume_svids() */ | |
1716 | return; | |
1717 | } | |
1718 | break; | |
1719 | default: | |
f0690a25 GR |
1720 | return; |
1721 | } | |
1722 | ||
4ab8c18d HK |
1723 | for (i = 1; i < cnt; i++) { |
1724 | paltmode = &pmdata->altmode_desc[pmdata->altmodes]; | |
1725 | memset(paltmode, 0, sizeof(*paltmode)); | |
1726 | ||
1727 | paltmode->svid = pmdata->svids[pmdata->svid_index]; | |
1728 | paltmode->mode = i; | |
8afe9a35 | 1729 | paltmode->vdo = p[i]; |
4ab8c18d HK |
1730 | |
1731 | tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x", | |
1732 | pmdata->altmodes, paltmode->svid, | |
1733 | paltmode->mode, paltmode->vdo); | |
1734 | ||
4ab8c18d | 1735 | pmdata->altmodes++; |
f0690a25 | 1736 | } |
f0690a25 GR |
1737 | } |
1738 | ||
e9576fe8 HK |
1739 | static void tcpm_register_partner_altmodes(struct tcpm_port *port) |
1740 | { | |
1741 | struct pd_mode_data *modep = &port->mode_data; | |
1742 | struct typec_altmode *altmode; | |
1743 | int i; | |
1744 | ||
1745 | for (i = 0; i < modep->altmodes; i++) { | |
1746 | altmode = typec_partner_register_altmode(port->partner, | |
1747 | &modep->altmode_desc[i]); | |
d25d61be | 1748 | if (IS_ERR(altmode)) { |
e9576fe8 HK |
1749 | tcpm_log(port, "Failed to register partner SVID 0x%04x", |
1750 | modep->altmode_desc[i].svid); | |
d25d61be KT |
1751 | altmode = NULL; |
1752 | } | |
e9576fe8 HK |
1753 | port->partner_altmode[i] = altmode; |
1754 | } | |
1755 | } | |
1756 | ||
41d9d753 RB |
1757 | static void tcpm_register_plug_altmodes(struct tcpm_port *port) |
1758 | { | |
1759 | struct pd_mode_data *modep = &port->mode_data_prime; | |
1760 | struct typec_altmode *altmode; | |
1761 | int i; | |
1762 | ||
1763 | typec_plug_set_num_altmodes(port->plug_prime, modep->altmodes); | |
1764 | ||
1765 | for (i = 0; i < modep->altmodes; i++) { | |
1766 | altmode = typec_plug_register_altmode(port->plug_prime, | |
1767 | &modep->altmode_desc[i]); | |
1768 | if (IS_ERR(altmode)) { | |
1769 | tcpm_log(port, "Failed to register plug SVID 0x%04x", | |
1770 | modep->altmode_desc[i].svid); | |
1771 | altmode = NULL; | |
1772 | } | |
1773 | port->plug_prime_altmode[i] = altmode; | |
1774 | } | |
1775 | } | |
1776 | ||
f0690a25 | 1777 | #define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header) |
41d9d753 | 1778 | #define supports_modal_cable(port) PD_IDH_MODAL_SUPP((port)->cable_ident.id_header) |
fb7ff25a | 1779 | #define supports_host(port) PD_IDH_HOST_SUPP((port->partner_ident.id_header)) |
f0690a25 | 1780 | |
e03f6fef RB |
1781 | /* |
1782 | * Helper to determine whether the port is capable of SOP' communication at the | |
1783 | * current point in time. | |
1784 | */ | |
1785 | static bool tcpm_can_communicate_sop_prime(struct tcpm_port *port) | |
1786 | { | |
1787 | /* Check to see if tcpc supports SOP' communication */ | |
1788 | if (!port->tcpc->cable_comm_capable || !port->tcpc->cable_comm_capable(port->tcpc)) | |
1789 | return false; | |
1790 | /* | |
1791 | * Power Delivery 2.0 Section 6.3.11 | |
1792 | * Before communicating with a Cable Plug a Port Should ensure that it | |
1793 | * is the Vconn Source and that the Cable Plugs are powered by | |
1794 | * performing a Vconn swap if necessary. Since it cannot be guaranteed | |
1795 | * that the present Vconn Source is supplying Vconn, the only means to | |
1796 | * ensure that the Cable Plugs are powered is for a Port wishing to | |
1797 | * communicate with a Cable Plug is to become the Vconn Source. | |
1798 | * | |
1799 | * Power Delivery 3.0 Section 6.3.11 | |
1800 | * Before communicating with a Cable Plug a Port Shall ensure that it | |
1801 | * is the Vconn source. | |
1802 | */ | |
1803 | if (port->vconn_role != TYPEC_SOURCE) | |
1804 | return false; | |
1805 | /* | |
1806 | * Power Delivery 2.0 Section 2.4.4 | |
1807 | * When no Contract or an Implicit Contract is in place the Source can | |
1808 | * communicate with a Cable Plug using SOP' packets in order to discover | |
1809 | * its characteristics. | |
1810 | * | |
1811 | * Power Delivery 3.0 Section 2.4.4 | |
1812 | * When no Contract or an Implicit Contract is in place only the Source | |
1813 | * port that is supplying Vconn is allowed to send packets to a Cable | |
1814 | * Plug and is allowed to respond to packets from the Cable Plug. | |
1815 | */ | |
1816 | if (!port->explicit_contract) | |
1817 | return port->pwr_role == TYPEC_SOURCE; | |
1818 | if (port->negotiated_rev == PD_REV30) | |
1819 | return true; | |
1820 | /* | |
1821 | * Power Delivery 2.0 Section 2.4.4 | |
1822 | * | |
1823 | * When an Explicit Contract is in place the DFP (either the Source or | |
1824 | * the Sink) can communicate with the Cable Plug(s) using SOP’/SOP” | |
1825 | * Packets (see Figure 2-3). | |
1826 | */ | |
1827 | if (port->negotiated_rev == PD_REV20) | |
1828 | return port->data_role == TYPEC_HOST; | |
1829 | return false; | |
1830 | } | |
1831 | ||
fb7ff25a RB |
1832 | static bool tcpm_attempt_vconn_swap_discovery(struct tcpm_port *port) |
1833 | { | |
1834 | if (!port->tcpc->attempt_vconn_swap_discovery) | |
1835 | return false; | |
1836 | ||
1837 | /* Port is already source, no need to perform swap */ | |
1838 | if (port->vconn_role == TYPEC_SOURCE) | |
1839 | return false; | |
1840 | ||
1841 | /* | |
1842 | * Partner needs to support Alternate Modes with modal support. If | |
1843 | * partner is also capable of being a USB Host, it could be a device | |
1844 | * that supports Alternate Modes as the DFP. | |
1845 | */ | |
1846 | if (!supports_modal(port) || supports_host(port)) | |
1847 | return false; | |
1848 | ||
1849 | if ((port->negotiated_rev == PD_REV20 && port->data_role == TYPEC_HOST) || | |
1850 | port->negotiated_rev == PD_REV30) | |
1851 | return port->tcpc->attempt_vconn_swap_discovery(port->tcpc); | |
1852 | ||
1853 | return false; | |
1854 | } | |
1855 | ||
41d9d753 RB |
1856 | |
1857 | static bool tcpm_cable_vdm_supported(struct tcpm_port *port) | |
1858 | { | |
1859 | return !IS_ERR_OR_NULL(port->cable) && | |
1860 | typec_cable_is_active(port->cable) && | |
1861 | supports_modal_cable(port) && | |
1862 | tcpm_can_communicate_sop_prime(port); | |
1863 | } | |
f0690a25 | 1864 | |
95b4d51c HG |
1865 | static int tcpm_pd_svdm(struct tcpm_port *port, struct typec_altmode *adev, |
1866 | const u32 *p, int cnt, u32 *response, | |
fb7ff25a RB |
1867 | enum adev_actions *adev_action, |
1868 | enum tcpm_transmit_type rx_sop_type, | |
1869 | enum tcpm_transmit_type *response_tx_sop_type) | |
f0690a25 | 1870 | { |
5e1d4c49 | 1871 | struct typec_port *typec = port->typec_port; |
41d9d753 RB |
1872 | struct typec_altmode *pdev, *pdev_prime; |
1873 | struct pd_mode_data *modep, *modep_prime; | |
5e1d4c49 | 1874 | int svdm_version; |
f0690a25 | 1875 | int rlen = 0; |
e9576fe8 HK |
1876 | int cmd_type; |
1877 | int cmd; | |
193a6801 | 1878 | int i; |
fb7ff25a | 1879 | int ret; |
f0690a25 | 1880 | |
e9576fe8 HK |
1881 | cmd_type = PD_VDO_CMDT(p[0]); |
1882 | cmd = PD_VDO_CMD(p[0]); | |
1883 | ||
f0690a25 | 1884 | tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d", |
e9576fe8 | 1885 | p[0], cmd_type, cmd, cnt); |
f0690a25 | 1886 | |
fb7ff25a RB |
1887 | switch (rx_sop_type) { |
1888 | case TCPC_TX_SOP_PRIME: | |
41d9d753 RB |
1889 | modep_prime = &port->mode_data_prime; |
1890 | pdev_prime = typec_match_altmode(port->plug_prime_altmode, | |
1891 | ALTMODE_DISCOVERY_MAX, | |
1892 | PD_VDO_VID(p[0]), | |
1893 | PD_VDO_OPOS(p[0])); | |
0e287901 RB |
1894 | svdm_version = typec_get_cable_svdm_version(typec); |
1895 | /* | |
1896 | * Update SVDM version if cable was discovered before port partner. | |
1897 | */ | |
1898 | if (!IS_ERR_OR_NULL(port->cable) && | |
1899 | PD_VDO_SVDM_VER(p[0]) < svdm_version) | |
1900 | typec_cable_set_svdm_version(port->cable, svdm_version); | |
fb7ff25a RB |
1901 | break; |
1902 | case TCPC_TX_SOP: | |
41d9d753 RB |
1903 | modep = &port->mode_data; |
1904 | pdev = typec_match_altmode(port->partner_altmode, | |
1905 | ALTMODE_DISCOVERY_MAX, | |
1906 | PD_VDO_VID(p[0]), | |
1907 | PD_VDO_OPOS(p[0])); | |
fb7ff25a RB |
1908 | svdm_version = typec_get_negotiated_svdm_version(typec); |
1909 | if (svdm_version < 0) | |
1910 | return 0; | |
1911 | break; | |
1912 | default: | |
41d9d753 RB |
1913 | modep = &port->mode_data; |
1914 | pdev = typec_match_altmode(port->partner_altmode, | |
1915 | ALTMODE_DISCOVERY_MAX, | |
1916 | PD_VDO_VID(p[0]), | |
1917 | PD_VDO_OPOS(p[0])); | |
fb7ff25a RB |
1918 | svdm_version = typec_get_negotiated_svdm_version(typec); |
1919 | if (svdm_version < 0) | |
1920 | return 0; | |
1921 | break; | |
1922 | } | |
5e1d4c49 | 1923 | |
f0690a25 GR |
1924 | switch (cmd_type) { |
1925 | case CMDT_INIT: | |
0e287901 RB |
1926 | /* |
1927 | * Only the port or port partner is allowed to initialize SVDM | |
1928 | * commands over SOP'. In case the port partner initializes a | |
1929 | * sequence when it is not allowed to send SOP' messages, drop | |
1930 | * the message should the TCPM port try to process it. | |
1931 | */ | |
1932 | if (rx_sop_type == TCPC_TX_SOP_PRIME) | |
1933 | return 0; | |
1934 | ||
f0690a25 GR |
1935 | switch (cmd) { |
1936 | case CMD_DISCOVER_IDENT: | |
8dea75e1 KT |
1937 | if (PD_VDO_VID(p[0]) != USB_SID_PD) |
1938 | break; | |
1939 | ||
4987daf8 JH |
1940 | if (IS_ERR_OR_NULL(port->partner)) |
1941 | break; | |
1942 | ||
f41bfc7e | 1943 | if (PD_VDO_SVDM_VER(p[0]) < svdm_version) { |
5e1d4c49 KT |
1944 | typec_partner_set_svdm_version(port->partner, |
1945 | PD_VDO_SVDM_VER(p[0])); | |
f41bfc7e KT |
1946 | svdm_version = PD_VDO_SVDM_VER(p[0]); |
1947 | } | |
0bc3ee92 | 1948 | |
80137c18 | 1949 | port->ams = DISCOVER_IDENTITY; |
f41bfc7e KT |
1950 | /* |
1951 | * PD2.0 Spec 6.10.3: respond with NAK as DFP (data host) | |
1952 | * PD3.1 Spec 6.4.4.2.5.1: respond with NAK if "invalid field" or | |
1953 | * "wrong configuation" or "Unrecognized" | |
1954 | */ | |
1955 | if ((port->data_role == TYPEC_DEVICE || svdm_version >= SVDM_VER_2_0) && | |
193a6801 | 1956 | port->nr_snk_vdo) { |
7ac50510 KT |
1957 | if (svdm_version < SVDM_VER_2_0) { |
1958 | for (i = 0; i < port->nr_snk_vdo_v1; i++) | |
1959 | response[i + 1] = port->snk_vdo_v1[i]; | |
1960 | rlen = port->nr_snk_vdo_v1 + 1; | |
1961 | ||
1962 | } else { | |
1963 | for (i = 0; i < port->nr_snk_vdo; i++) | |
1964 | response[i + 1] = port->snk_vdo[i]; | |
1965 | rlen = port->nr_snk_vdo + 1; | |
1966 | } | |
193a6801 | 1967 | } |
f0690a25 GR |
1968 | break; |
1969 | case CMD_DISCOVER_SVID: | |
80137c18 | 1970 | port->ams = DISCOVER_SVIDS; |
f0690a25 GR |
1971 | break; |
1972 | case CMD_DISCOVER_MODES: | |
80137c18 | 1973 | port->ams = DISCOVER_MODES; |
f0690a25 GR |
1974 | break; |
1975 | case CMD_ENTER_MODE: | |
80137c18 | 1976 | port->ams = DFP_TO_UFP_ENTER_MODE; |
f0690a25 GR |
1977 | break; |
1978 | case CMD_EXIT_MODE: | |
80137c18 | 1979 | port->ams = DFP_TO_UFP_EXIT_MODE; |
f0690a25 GR |
1980 | break; |
1981 | case CMD_ATTENTION: | |
e9576fe8 | 1982 | /* Attention command does not have response */ |
95b4d51c | 1983 | *adev_action = ADEV_ATTENTION; |
e9576fe8 | 1984 | return 0; |
f0690a25 GR |
1985 | default: |
1986 | break; | |
1987 | } | |
1988 | if (rlen >= 1) { | |
e9576fe8 | 1989 | response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK); |
f0690a25 | 1990 | } else if (rlen == 0) { |
e9576fe8 | 1991 | response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK); |
f0690a25 GR |
1992 | rlen = 1; |
1993 | } else { | |
e9576fe8 | 1994 | response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY); |
f0690a25 GR |
1995 | rlen = 1; |
1996 | } | |
5e1d4c49 KT |
1997 | response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) | |
1998 | (VDO_SVDM_VERS(typec_get_negotiated_svdm_version(typec))); | |
f0690a25 GR |
1999 | break; |
2000 | case CMDT_RSP_ACK: | |
fb7ff25a RB |
2001 | /* |
2002 | * Silently drop message if we are not connected, but can process | |
2003 | * if SOP' Discover Identity prior to explicit contract. | |
2004 | */ | |
2005 | if (IS_ERR_OR_NULL(port->partner) && | |
2006 | !(rx_sop_type == TCPC_TX_SOP_PRIME && cmd == CMD_DISCOVER_IDENT)) | |
f0690a25 GR |
2007 | break; |
2008 | ||
0908c5ac KT |
2009 | tcpm_ams_finish(port); |
2010 | ||
f0690a25 | 2011 | switch (cmd) { |
fb7ff25a RB |
2012 | /* |
2013 | * SVDM Command Flow for SOP and SOP': | |
2014 | * SOP Discover Identity | |
2015 | * SOP' Discover Identity | |
2016 | * SOP Discover SVIDs | |
2017 | * Discover Modes | |
41d9d753 RB |
2018 | * (Active Cables) |
2019 | * SOP' Discover SVIDs | |
2020 | * Discover Modes | |
fb7ff25a RB |
2021 | * |
2022 | * Perform Discover SOP' if the port can communicate with cable | |
2023 | * plug. | |
2024 | */ | |
f0690a25 | 2025 | case CMD_DISCOVER_IDENT: |
fb7ff25a RB |
2026 | switch (rx_sop_type) { |
2027 | case TCPC_TX_SOP: | |
2028 | if (PD_VDO_SVDM_VER(p[0]) < svdm_version) { | |
2029 | typec_partner_set_svdm_version(port->partner, | |
2030 | PD_VDO_SVDM_VER(p[0])); | |
2031 | /* If cable is discovered before partner, downgrade svdm */ | |
2032 | if (!IS_ERR_OR_NULL(port->cable) && | |
2033 | (typec_get_cable_svdm_version(port->typec_port) > | |
2034 | svdm_version)) | |
2035 | typec_cable_set_svdm_version(port->cable, | |
2036 | svdm_version); | |
2037 | } | |
2038 | /* 6.4.4.3.1 */ | |
2039 | svdm_consume_identity(port, p, cnt); | |
2040 | /* Attempt Vconn swap, delay SOP' discovery if necessary */ | |
2041 | if (tcpm_attempt_vconn_swap_discovery(port)) { | |
2042 | port->send_discover_prime = true; | |
2043 | port->upcoming_state = VCONN_SWAP_SEND; | |
2044 | ret = tcpm_ams_start(port, VCONN_SWAP); | |
2045 | if (!ret) | |
2046 | return 0; | |
af8b6270 | 2047 | /* Cannot perform Vconn swap */ |
fb7ff25a RB |
2048 | port->upcoming_state = INVALID_STATE; |
2049 | port->send_discover_prime = false; | |
2050 | } | |
2051 | ||
2052 | /* | |
2053 | * Attempt Discover Identity on SOP' if the | |
2054 | * cable was not discovered previously, and use | |
2055 | * the SVDM version of the partner to probe. | |
2056 | */ | |
2057 | if (IS_ERR_OR_NULL(port->cable) && | |
2058 | tcpm_can_communicate_sop_prime(port)) { | |
2059 | *response_tx_sop_type = TCPC_TX_SOP_PRIME; | |
2060 | port->send_discover_prime = true; | |
2061 | response[0] = VDO(USB_SID_PD, 1, | |
2062 | typec_get_negotiated_svdm_version(typec), | |
2063 | CMD_DISCOVER_IDENT); | |
2064 | rlen = 1; | |
2065 | } else { | |
2066 | *response_tx_sop_type = TCPC_TX_SOP; | |
2067 | response[0] = VDO(USB_SID_PD, 1, | |
2068 | typec_get_negotiated_svdm_version(typec), | |
2069 | CMD_DISCOVER_SVID); | |
2070 | rlen = 1; | |
2071 | } | |
2072 | break; | |
2073 | case TCPC_TX_SOP_PRIME: | |
2074 | /* | |
2075 | * svdm_consume_identity_sop_prime will determine | |
2076 | * the svdm_version for the cable moving forward. | |
2077 | */ | |
2078 | svdm_consume_identity_sop_prime(port, p, cnt); | |
af8b6270 RB |
2079 | |
2080 | /* | |
2081 | * If received in SRC_VDM_IDENTITY_REQUEST, continue | |
2082 | * to SRC_SEND_CAPABILITIES | |
2083 | */ | |
2084 | if (port->state == SRC_VDM_IDENTITY_REQUEST) { | |
2085 | tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0); | |
2086 | return 0; | |
2087 | } | |
2088 | ||
fb7ff25a RB |
2089 | *response_tx_sop_type = TCPC_TX_SOP; |
2090 | response[0] = VDO(USB_SID_PD, 1, | |
2091 | typec_get_negotiated_svdm_version(typec), | |
2092 | CMD_DISCOVER_SVID); | |
2093 | rlen = 1; | |
2094 | break; | |
2095 | default: | |
2096 | return 0; | |
2097 | } | |
f0690a25 GR |
2098 | break; |
2099 | case CMD_DISCOVER_SVID: | |
41d9d753 | 2100 | *response_tx_sop_type = rx_sop_type; |
f0690a25 | 2101 | /* 6.4.4.3.2 */ |
41d9d753 | 2102 | if (svdm_consume_svids(port, p, cnt, rx_sop_type)) { |
5e1d4c49 | 2103 | response[0] = VDO(USB_SID_PD, 1, svdm_version, CMD_DISCOVER_SVID); |
f0690a25 | 2104 | rlen = 1; |
41d9d753 RB |
2105 | } else { |
2106 | if (rx_sop_type == TCPC_TX_SOP) { | |
2107 | if (modep->nsvids && supports_modal(port)) { | |
2108 | response[0] = VDO(modep->svids[0], 1, svdm_version, | |
2109 | CMD_DISCOVER_MODES); | |
2110 | rlen = 1; | |
2111 | } | |
2112 | } else if (rx_sop_type == TCPC_TX_SOP_PRIME) { | |
2113 | if (modep_prime->nsvids) { | |
2114 | response[0] = VDO(modep_prime->svids[0], 1, | |
2115 | svdm_version, CMD_DISCOVER_MODES); | |
2116 | rlen = 1; | |
2117 | } | |
2118 | } | |
f0690a25 GR |
2119 | } |
2120 | break; | |
2121 | case CMD_DISCOVER_MODES: | |
41d9d753 RB |
2122 | if (rx_sop_type == TCPC_TX_SOP) { |
2123 | /* 6.4.4.3.3 */ | |
2124 | svdm_consume_modes(port, p, cnt, rx_sop_type); | |
2125 | modep->svid_index++; | |
2126 | if (modep->svid_index < modep->nsvids) { | |
2127 | u16 svid = modep->svids[modep->svid_index]; | |
2128 | *response_tx_sop_type = TCPC_TX_SOP; | |
2129 | response[0] = VDO(svid, 1, svdm_version, | |
2130 | CMD_DISCOVER_MODES); | |
2131 | rlen = 1; | |
2132 | } else if (tcpm_cable_vdm_supported(port)) { | |
2133 | *response_tx_sop_type = TCPC_TX_SOP_PRIME; | |
2134 | response[0] = VDO(USB_SID_PD, 1, | |
2135 | typec_get_cable_svdm_version(typec), | |
2136 | CMD_DISCOVER_SVID); | |
2137 | rlen = 1; | |
2138 | } else { | |
2139 | tcpm_register_partner_altmodes(port); | |
2140 | } | |
2141 | } else if (rx_sop_type == TCPC_TX_SOP_PRIME) { | |
2142 | /* 6.4.4.3.3 */ | |
2143 | svdm_consume_modes(port, p, cnt, rx_sop_type); | |
2144 | modep_prime->svid_index++; | |
2145 | if (modep_prime->svid_index < modep_prime->nsvids) { | |
2146 | u16 svid = modep_prime->svids[modep_prime->svid_index]; | |
2147 | *response_tx_sop_type = TCPC_TX_SOP_PRIME; | |
2148 | response[0] = VDO(svid, 1, | |
2149 | typec_get_cable_svdm_version(typec), | |
2150 | CMD_DISCOVER_MODES); | |
2151 | rlen = 1; | |
2152 | } else { | |
2153 | tcpm_register_plug_altmodes(port); | |
2154 | tcpm_register_partner_altmodes(port); | |
2155 | } | |
f0690a25 GR |
2156 | } |
2157 | break; | |
2158 | case CMD_ENTER_MODE: | |
7e7877c5 RB |
2159 | *response_tx_sop_type = rx_sop_type; |
2160 | if (rx_sop_type == TCPC_TX_SOP) { | |
2161 | if (adev && pdev) { | |
2162 | typec_altmode_update_active(pdev, true); | |
2163 | *adev_action = ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL; | |
2164 | } | |
2165 | } else if (rx_sop_type == TCPC_TX_SOP_PRIME) { | |
2166 | if (adev && pdev_prime) { | |
2167 | typec_altmode_update_active(pdev_prime, true); | |
2168 | *adev_action = ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL; | |
2169 | } | |
2170 | } | |
e9576fe8 HK |
2171 | return 0; |
2172 | case CMD_EXIT_MODE: | |
7e7877c5 RB |
2173 | *response_tx_sop_type = rx_sop_type; |
2174 | if (rx_sop_type == TCPC_TX_SOP) { | |
2175 | if (adev && pdev) { | |
2176 | typec_altmode_update_active(pdev, false); | |
2177 | /* Back to USB Operation */ | |
2178 | *adev_action = ADEV_NOTIFY_USB_AND_QUEUE_VDM; | |
2179 | return 0; | |
2180 | } | |
88d02c9b | 2181 | } |
e9576fe8 | 2182 | break; |
8dea75e1 KT |
2183 | case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15): |
2184 | break; | |
e9576fe8 | 2185 | default: |
8dea75e1 KT |
2186 | /* Unrecognized SVDM */ |
2187 | response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK); | |
2188 | rlen = 1; | |
5e1d4c49 KT |
2189 | response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) | |
2190 | (VDO_SVDM_VERS(svdm_version)); | |
e9576fe8 HK |
2191 | break; |
2192 | } | |
2193 | break; | |
2194 | case CMDT_RSP_NAK: | |
0908c5ac | 2195 | tcpm_ams_finish(port); |
e9576fe8 | 2196 | switch (cmd) { |
8dea75e1 KT |
2197 | case CMD_DISCOVER_IDENT: |
2198 | case CMD_DISCOVER_SVID: | |
2199 | case CMD_DISCOVER_MODES: | |
2200 | case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15): | |
2201 | break; | |
e9576fe8 HK |
2202 | case CMD_ENTER_MODE: |
2203 | /* Back to USB Operation */ | |
95b4d51c HG |
2204 | *adev_action = ADEV_NOTIFY_USB_AND_QUEUE_VDM; |
2205 | return 0; | |
f0690a25 | 2206 | default: |
8dea75e1 KT |
2207 | /* Unrecognized SVDM */ |
2208 | response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK); | |
2209 | rlen = 1; | |
5e1d4c49 KT |
2210 | response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) | |
2211 | (VDO_SVDM_VERS(svdm_version)); | |
f0690a25 GR |
2212 | break; |
2213 | } | |
2214 | break; | |
2215 | default: | |
8dea75e1 KT |
2216 | response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK); |
2217 | rlen = 1; | |
5e1d4c49 KT |
2218 | response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) | |
2219 | (VDO_SVDM_VERS(svdm_version)); | |
f0690a25 GR |
2220 | break; |
2221 | } | |
2222 | ||
e9576fe8 | 2223 | /* Informing the alternate mode drivers about everything */ |
95b4d51c | 2224 | *adev_action = ADEV_QUEUE_VDM; |
f0690a25 GR |
2225 | return rlen; |
2226 | } | |
2227 | ||
5571ea31 HG |
2228 | static void tcpm_pd_handle_msg(struct tcpm_port *port, |
2229 | enum pd_msg_request message, | |
2230 | enum tcpm_ams ams); | |
2231 | ||
f0690a25 | 2232 | static void tcpm_handle_vdm_request(struct tcpm_port *port, |
fb7ff25a RB |
2233 | const __le32 *payload, int cnt, |
2234 | enum tcpm_transmit_type rx_sop_type) | |
f0690a25 | 2235 | { |
95b4d51c HG |
2236 | enum adev_actions adev_action = ADEV_NONE; |
2237 | struct typec_altmode *adev; | |
8afe9a35 | 2238 | u32 p[PD_MAX_PAYLOAD]; |
f0690a25 | 2239 | u32 response[8] = { }; |
8afe9a35 | 2240 | int i, rlen = 0; |
fb7ff25a | 2241 | enum tcpm_transmit_type response_tx_sop_type = TCPC_TX_SOP; |
8afe9a35 HG |
2242 | |
2243 | for (i = 0; i < cnt; i++) | |
2244 | p[i] = le32_to_cpu(payload[i]); | |
f0690a25 | 2245 | |
95b4d51c HG |
2246 | adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX, |
2247 | PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0])); | |
2248 | ||
f0690a25 GR |
2249 | if (port->vdm_state == VDM_STATE_BUSY) { |
2250 | /* If UFP responded busy retry after timeout */ | |
8afe9a35 | 2251 | if (PD_VDO_CMDT(p[0]) == CMDT_RSP_BUSY) { |
f0690a25 | 2252 | port->vdm_state = VDM_STATE_WAIT_RSP_BUSY; |
8afe9a35 | 2253 | port->vdo_retry = (p[0] & ~VDO_CMDT_MASK) | |
f0690a25 | 2254 | CMDT_INIT; |
3ed8e1c2 | 2255 | mod_vdm_delayed_work(port, PD_T_VDM_BUSY); |
f0690a25 GR |
2256 | return; |
2257 | } | |
2258 | port->vdm_state = VDM_STATE_DONE; | |
2259 | } | |
2260 | ||
5571ea31 | 2261 | if (PD_VDO_SVDM(p[0]) && (adev || tcpm_vdm_ams(port) || port->nr_snk_vdo)) { |
ef52b4a9 KT |
2262 | /* |
2263 | * Here a SVDM is received (INIT or RSP or unknown). Set the vdm_sm_running in | |
2264 | * advance because we are dropping the lock but may send VDMs soon. | |
2265 | * For the cases of INIT received: | |
2266 | * - If no response to send, it will be cleared later in this function. | |
2267 | * - If there are responses to send, it will be cleared in the state machine. | |
2268 | * For the cases of RSP received: | |
2269 | * - If no further INIT to send, it will be cleared later in this function. | |
2270 | * - Otherwise, it will be cleared in the state machine if timeout or it will go | |
2271 | * back here until no further INIT to send. | |
2272 | * For the cases of unknown type received: | |
2273 | * - We will send NAK and the flag will be cleared in the state machine. | |
2274 | */ | |
2275 | port->vdm_sm_running = true; | |
fb7ff25a RB |
2276 | rlen = tcpm_pd_svdm(port, adev, p, cnt, response, &adev_action, |
2277 | rx_sop_type, &response_tx_sop_type); | |
8dea75e1 KT |
2278 | } else { |
2279 | if (port->negotiated_rev >= PD_REV30) | |
5571ea31 | 2280 | tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS); |
8dea75e1 | 2281 | } |
95b4d51c | 2282 | |
a37241d8 HG |
2283 | /* |
2284 | * We are done with any state stored in the port struct now, except | |
2285 | * for any port struct changes done by the tcpm_queue_vdm() call | |
2286 | * below, which is a separate operation. | |
2287 | * | |
2288 | * So we can safely release the lock here; and we MUST release the | |
2289 | * lock here to avoid an AB BA lock inversion: | |
2290 | * | |
2291 | * If we keep the lock here then the lock ordering in this path is: | |
2292 | * 1. tcpm_pd_rx_handler take the tcpm port lock | |
2293 | * 2. One of the typec_altmode_* calls below takes the alt-mode's lock | |
2294 | * | |
2295 | * And we also have this ordering: | |
2296 | * 1. alt-mode driver takes the alt-mode's lock | |
2297 | * 2. alt-mode driver calls tcpm_altmode_enter which takes the | |
2298 | * tcpm port lock | |
2299 | * | |
2300 | * Dropping our lock here avoids this. | |
2301 | */ | |
2302 | mutex_unlock(&port->lock); | |
2303 | ||
95b4d51c HG |
2304 | if (adev) { |
2305 | switch (adev_action) { | |
2306 | case ADEV_NONE: | |
2307 | break; | |
2308 | case ADEV_NOTIFY_USB_AND_QUEUE_VDM: | |
2309 | WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB, NULL)); | |
2310 | typec_altmode_vdm(adev, p[0], &p[1], cnt); | |
2311 | break; | |
2312 | case ADEV_QUEUE_VDM: | |
7e7877c5 RB |
2313 | if (response_tx_sop_type == TCPC_TX_SOP_PRIME) |
2314 | typec_cable_altmode_vdm(adev, TYPEC_PLUG_SOP_P, p[0], &p[1], cnt); | |
2315 | else | |
2316 | typec_altmode_vdm(adev, p[0], &p[1], cnt); | |
95b4d51c HG |
2317 | break; |
2318 | case ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL: | |
7e7877c5 RB |
2319 | if (response_tx_sop_type == TCPC_TX_SOP_PRIME) { |
2320 | if (typec_cable_altmode_vdm(adev, TYPEC_PLUG_SOP_P, | |
2321 | p[0], &p[1], cnt)) { | |
2322 | int svdm_version = typec_get_cable_svdm_version( | |
2323 | port->typec_port); | |
2324 | if (svdm_version < 0) | |
2325 | break; | |
5e1d4c49 | 2326 | |
7e7877c5 RB |
2327 | response[0] = VDO(adev->svid, 1, svdm_version, |
2328 | CMD_EXIT_MODE); | |
2329 | response[0] |= VDO_OPOS(adev->mode); | |
2330 | rlen = 1; | |
2331 | } | |
2332 | } else { | |
2333 | if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) { | |
2334 | int svdm_version = typec_get_negotiated_svdm_version( | |
2335 | port->typec_port); | |
2336 | if (svdm_version < 0) | |
2337 | break; | |
2338 | ||
2339 | response[0] = VDO(adev->svid, 1, svdm_version, | |
2340 | CMD_EXIT_MODE); | |
2341 | response[0] |= VDO_OPOS(adev->mode); | |
2342 | rlen = 1; | |
2343 | } | |
95b4d51c HG |
2344 | } |
2345 | break; | |
2346 | case ADEV_ATTENTION: | |
f2364330 RB |
2347 | if (typec_altmode_attention(adev, p[1])) |
2348 | tcpm_log(port, "typec_altmode_attention no port partner altmode"); | |
95b4d51c HG |
2349 | break; |
2350 | } | |
2351 | } | |
f0690a25 | 2352 | |
a37241d8 HG |
2353 | /* |
2354 | * We must re-take the lock here to balance the unlock in | |
2355 | * tcpm_pd_rx_handler, note that no changes, other then the | |
2356 | * tcpm_queue_vdm call, are made while the lock is held again. | |
2357 | * All that is done after the call is unwinding the call stack until | |
2358 | * we return to tcpm_pd_rx_handler and do the unlock there. | |
2359 | */ | |
2360 | mutex_lock(&port->lock); | |
2361 | ||
5f2b8d87 | 2362 | if (rlen > 0) |
fb7ff25a | 2363 | tcpm_queue_vdm(port, response[0], &response[1], rlen - 1, response_tx_sop_type); |
ef52b4a9 KT |
2364 | else |
2365 | port->vdm_sm_running = false; | |
f0690a25 GR |
2366 | } |
2367 | ||
2368 | static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd, | |
fb7ff25a | 2369 | const u32 *data, int count, enum tcpm_transmit_type tx_sop_type) |
f0690a25 | 2370 | { |
fb7ff25a | 2371 | int svdm_version; |
f0690a25 GR |
2372 | u32 header; |
2373 | ||
fb7ff25a RB |
2374 | switch (tx_sop_type) { |
2375 | case TCPC_TX_SOP_PRIME: | |
2376 | /* | |
2377 | * If the port partner is discovered, then the port partner's | |
2378 | * SVDM Version will be returned | |
2379 | */ | |
2380 | svdm_version = typec_get_cable_svdm_version(port->typec_port); | |
2381 | if (svdm_version < 0) | |
2382 | svdm_version = SVDM_VER_MAX; | |
2383 | break; | |
2384 | case TCPC_TX_SOP: | |
2385 | svdm_version = typec_get_negotiated_svdm_version(port->typec_port); | |
2386 | if (svdm_version < 0) | |
2387 | return; | |
2388 | break; | |
2389 | default: | |
2390 | svdm_version = typec_get_negotiated_svdm_version(port->typec_port); | |
2391 | if (svdm_version < 0) | |
2392 | return; | |
2393 | break; | |
2394 | } | |
5e1d4c49 | 2395 | |
f0690a25 GR |
2396 | if (WARN_ON(count > VDO_MAX_SIZE - 1)) |
2397 | count = VDO_MAX_SIZE - 1; | |
2398 | ||
2399 | /* set VDM header with VID & CMD */ | |
2400 | header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ? | |
5e1d4c49 KT |
2401 | 1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION), |
2402 | svdm_version, cmd); | |
fb7ff25a | 2403 | tcpm_queue_vdm(port, header, data, count, tx_sop_type); |
f0690a25 GR |
2404 | } |
2405 | ||
2406 | static unsigned int vdm_ready_timeout(u32 vdm_hdr) | |
2407 | { | |
2408 | unsigned int timeout; | |
2409 | int cmd = PD_VDO_CMD(vdm_hdr); | |
2410 | ||
2411 | /* its not a structured VDM command */ | |
2412 | if (!PD_VDO_SVDM(vdm_hdr)) | |
2413 | return PD_T_VDM_UNSTRUCTURED; | |
2414 | ||
2415 | switch (PD_VDO_CMDT(vdm_hdr)) { | |
2416 | case CMDT_INIT: | |
2417 | if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE) | |
2418 | timeout = PD_T_VDM_WAIT_MODE_E; | |
2419 | else | |
2420 | timeout = PD_T_VDM_SNDR_RSP; | |
2421 | break; | |
2422 | default: | |
2423 | if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE) | |
2424 | timeout = PD_T_VDM_E_MODE; | |
2425 | else | |
2426 | timeout = PD_T_VDM_RCVR_RSP; | |
2427 | break; | |
2428 | } | |
2429 | return timeout; | |
2430 | } | |
2431 | ||
2432 | static void vdm_run_state_machine(struct tcpm_port *port) | |
2433 | { | |
2434 | struct pd_message msg; | |
0908c5ac KT |
2435 | int i, res = 0; |
2436 | u32 vdo_hdr = port->vdo_data[0]; | |
fb7ff25a | 2437 | u32 response[8] = { }; |
f0690a25 GR |
2438 | |
2439 | switch (port->vdm_state) { | |
2440 | case VDM_STATE_READY: | |
2441 | /* Only transmit VDM if attached */ | |
2442 | if (!port->attached) { | |
2443 | port->vdm_state = VDM_STATE_ERR_BUSY; | |
2444 | break; | |
2445 | } | |
2446 | ||
2447 | /* | |
2448 | * if there's traffic or we're not in PDO ready state don't send | |
2449 | * a VDM. | |
2450 | */ | |
af8b6270 RB |
2451 | if (port->state != SRC_READY && port->state != SNK_READY && |
2452 | port->state != SRC_VDM_IDENTITY_REQUEST) { | |
ef52b4a9 | 2453 | port->vdm_sm_running = false; |
f0690a25 | 2454 | break; |
ef52b4a9 | 2455 | } |
f0690a25 | 2456 | |
0908c5ac KT |
2457 | /* TODO: AMS operation for Unstructured VDM */ |
2458 | if (PD_VDO_SVDM(vdo_hdr) && PD_VDO_CMDT(vdo_hdr) == CMDT_INIT) { | |
2459 | switch (PD_VDO_CMD(vdo_hdr)) { | |
2460 | case CMD_DISCOVER_IDENT: | |
2461 | res = tcpm_ams_start(port, DISCOVER_IDENTITY); | |
abfc4fa2 | 2462 | if (res == 0) { |
fb7ff25a RB |
2463 | switch (port->tx_sop_type) { |
2464 | case TCPC_TX_SOP_PRIME: | |
2465 | port->send_discover_prime = false; | |
2466 | break; | |
2467 | case TCPC_TX_SOP: | |
2468 | port->send_discover = false; | |
2469 | break; | |
2470 | default: | |
2471 | port->send_discover = false; | |
2472 | break; | |
2473 | } | |
abfc4fa2 XY |
2474 | } else if (res == -EAGAIN) { |
2475 | port->vdo_data[0] = 0; | |
c34e85fa KT |
2476 | mod_send_discover_delayed_work(port, |
2477 | SEND_DISCOVER_RETRY_MS); | |
abfc4fa2 | 2478 | } |
0908c5ac KT |
2479 | break; |
2480 | case CMD_DISCOVER_SVID: | |
2481 | res = tcpm_ams_start(port, DISCOVER_SVIDS); | |
2482 | break; | |
2483 | case CMD_DISCOVER_MODES: | |
2484 | res = tcpm_ams_start(port, DISCOVER_MODES); | |
2485 | break; | |
2486 | case CMD_ENTER_MODE: | |
2487 | res = tcpm_ams_start(port, DFP_TO_UFP_ENTER_MODE); | |
2488 | break; | |
2489 | case CMD_EXIT_MODE: | |
2490 | res = tcpm_ams_start(port, DFP_TO_UFP_EXIT_MODE); | |
2491 | break; | |
2492 | case CMD_ATTENTION: | |
2493 | res = tcpm_ams_start(port, ATTENTION); | |
2494 | break; | |
2495 | case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15): | |
2496 | res = tcpm_ams_start(port, STRUCTURED_VDMS); | |
2497 | break; | |
2498 | default: | |
2499 | res = -EOPNOTSUPP; | |
2500 | break; | |
2501 | } | |
f0690a25 | 2502 | |
8d3a0578 | 2503 | if (res < 0) { |
c34e85fa | 2504 | port->vdm_state = VDM_STATE_ERR_BUSY; |
0908c5ac | 2505 | return; |
8d3a0578 | 2506 | } |
f0690a25 | 2507 | } |
0908c5ac KT |
2508 | |
2509 | port->vdm_state = VDM_STATE_SEND_MESSAGE; | |
2510 | mod_vdm_delayed_work(port, (port->negotiated_rev >= PD_REV30 && | |
2511 | port->pwr_role == TYPEC_SOURCE && | |
2512 | PD_VDO_SVDM(vdo_hdr) && | |
2513 | PD_VDO_CMDT(vdo_hdr) == CMDT_INIT) ? | |
2514 | PD_T_SINK_TX : 0); | |
f0690a25 GR |
2515 | break; |
2516 | case VDM_STATE_WAIT_RSP_BUSY: | |
2517 | port->vdo_data[0] = port->vdo_retry; | |
2518 | port->vdo_count = 1; | |
2519 | port->vdm_state = VDM_STATE_READY; | |
f1fbd950 | 2520 | tcpm_ams_finish(port); |
f0690a25 GR |
2521 | break; |
2522 | case VDM_STATE_BUSY: | |
2523 | port->vdm_state = VDM_STATE_ERR_TMOUT; | |
0908c5ac KT |
2524 | if (port->ams != NONE_AMS) |
2525 | tcpm_ams_finish(port); | |
f0690a25 GR |
2526 | break; |
2527 | case VDM_STATE_ERR_SEND: | |
af8b6270 RB |
2528 | /* |
2529 | * When sending Discover Identity to SOP' before establishing an | |
2530 | * explicit contract, do not retry. Instead, weave sending | |
2531 | * Source_Capabilities over SOP and Discover Identity over SOP'. | |
2532 | */ | |
2533 | if (port->state == SRC_VDM_IDENTITY_REQUEST) { | |
2534 | tcpm_ams_finish(port); | |
2535 | port->vdm_state = VDM_STATE_DONE; | |
2536 | tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0); | |
f0690a25 GR |
2537 | /* |
2538 | * A partner which does not support USB PD will not reply, | |
2539 | * so this is not a fatal error. At the same time, some | |
2540 | * devices may not return GoodCRC under some circumstances, | |
2541 | * so we need to retry. | |
2542 | */ | |
af8b6270 | 2543 | } else if (port->vdm_retries < 3) { |
f0690a25 GR |
2544 | tcpm_log(port, "VDM Tx error, retry"); |
2545 | port->vdm_retries++; | |
2546 | port->vdm_state = VDM_STATE_READY; | |
5ab14ab1 KT |
2547 | if (PD_VDO_SVDM(vdo_hdr) && PD_VDO_CMDT(vdo_hdr) == CMDT_INIT) |
2548 | tcpm_ams_finish(port); | |
2549 | } else { | |
0908c5ac | 2550 | tcpm_ams_finish(port); |
fb7ff25a RB |
2551 | if (port->tx_sop_type == TCPC_TX_SOP) |
2552 | break; | |
2553 | /* Handle SOP' Transmission Errors */ | |
2554 | switch (PD_VDO_CMD(vdo_hdr)) { | |
2555 | /* | |
2556 | * If Discover Identity fails on SOP', then resume | |
2557 | * discovery process on SOP only. | |
2558 | */ | |
2559 | case CMD_DISCOVER_IDENT: | |
2560 | port->vdo_data[0] = 0; | |
2561 | response[0] = VDO(USB_SID_PD, 1, | |
2562 | typec_get_negotiated_svdm_version( | |
2563 | port->typec_port), | |
2564 | CMD_DISCOVER_SVID); | |
2565 | tcpm_queue_vdm(port, response[0], &response[1], | |
2566 | 0, TCPC_TX_SOP); | |
2567 | break; | |
41d9d753 RB |
2568 | /* |
2569 | * If Discover SVIDs or Discover Modes fail, then | |
2570 | * proceed with Alt Mode discovery process on SOP. | |
2571 | */ | |
2572 | case CMD_DISCOVER_SVID: | |
2573 | tcpm_register_partner_altmodes(port); | |
2574 | break; | |
2575 | case CMD_DISCOVER_MODES: | |
2576 | tcpm_register_partner_altmodes(port); | |
2577 | break; | |
fb7ff25a RB |
2578 | default: |
2579 | break; | |
2580 | } | |
0908c5ac KT |
2581 | } |
2582 | break; | |
2583 | case VDM_STATE_SEND_MESSAGE: | |
2584 | /* Prepare and send VDM */ | |
2585 | memset(&msg, 0, sizeof(msg)); | |
fb7ff25a RB |
2586 | if (port->tx_sop_type == TCPC_TX_SOP_PRIME) { |
2587 | msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF, | |
2588 | 0, /* Cable Plug Indicator for DFP/UFP */ | |
2589 | 0, /* Reserved */ | |
2590 | port->negotiated_rev_prime, | |
2591 | port->message_id_prime, | |
2592 | port->vdo_count); | |
2593 | } else { | |
2594 | msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF, | |
2595 | port->pwr_role, | |
2596 | port->data_role, | |
2597 | port->negotiated_rev, | |
2598 | port->message_id, | |
2599 | port->vdo_count); | |
2600 | } | |
0908c5ac KT |
2601 | for (i = 0; i < port->vdo_count; i++) |
2602 | msg.payload[i] = cpu_to_le32(port->vdo_data[i]); | |
fb7ff25a | 2603 | res = tcpm_pd_transmit(port, port->tx_sop_type, &msg); |
0908c5ac KT |
2604 | if (res < 0) { |
2605 | port->vdm_state = VDM_STATE_ERR_SEND; | |
2606 | } else { | |
2607 | unsigned long timeout; | |
2608 | ||
2609 | port->vdm_retries = 0; | |
abfc4fa2 | 2610 | port->vdo_data[0] = 0; |
0908c5ac KT |
2611 | port->vdm_state = VDM_STATE_BUSY; |
2612 | timeout = vdm_ready_timeout(vdo_hdr); | |
2613 | mod_vdm_delayed_work(port, timeout); | |
f0690a25 GR |
2614 | } |
2615 | break; | |
2616 | default: | |
2617 | break; | |
2618 | } | |
2619 | } | |
2620 | ||
3ed8e1c2 | 2621 | static void vdm_state_machine_work(struct kthread_work *work) |
f0690a25 | 2622 | { |
3ed8e1c2 | 2623 | struct tcpm_port *port = container_of(work, struct tcpm_port, vdm_state_machine); |
f0690a25 GR |
2624 | enum vdm_states prev_state; |
2625 | ||
2626 | mutex_lock(&port->lock); | |
2627 | ||
2628 | /* | |
2629 | * Continue running as long as the port is not busy and there was | |
2630 | * a state change. | |
2631 | */ | |
2632 | do { | |
2633 | prev_state = port->vdm_state; | |
2634 | vdm_run_state_machine(port); | |
2635 | } while (port->vdm_state != prev_state && | |
0908c5ac KT |
2636 | port->vdm_state != VDM_STATE_BUSY && |
2637 | port->vdm_state != VDM_STATE_SEND_MESSAGE); | |
f0690a25 | 2638 | |
f1fbd950 | 2639 | if (port->vdm_state < VDM_STATE_READY) |
8d3a0578 KT |
2640 | port->vdm_sm_running = false; |
2641 | ||
f0690a25 GR |
2642 | mutex_unlock(&port->lock); |
2643 | } | |
2644 | ||
5007e1b5 BJS |
2645 | enum pdo_err { |
2646 | PDO_NO_ERR, | |
2647 | PDO_ERR_NO_VSAFE5V, | |
2648 | PDO_ERR_VSAFE5V_NOT_FIRST, | |
2649 | PDO_ERR_PDO_TYPE_NOT_IN_ORDER, | |
2650 | PDO_ERR_FIXED_NOT_SORTED, | |
2651 | PDO_ERR_VARIABLE_BATT_NOT_SORTED, | |
2652 | PDO_ERR_DUPE_PDO, | |
2eadc33f AT |
2653 | PDO_ERR_PPS_APDO_NOT_SORTED, |
2654 | PDO_ERR_DUPE_PPS_APDO, | |
5007e1b5 BJS |
2655 | }; |
2656 | ||
2657 | static const char * const pdo_err_msg[] = { | |
2658 | [PDO_ERR_NO_VSAFE5V] = | |
f73800a9 | 2659 | " err: source/sink caps should at least have vSafe5V", |
5007e1b5 BJS |
2660 | [PDO_ERR_VSAFE5V_NOT_FIRST] = |
2661 | " err: vSafe5V Fixed Supply Object Shall always be the first object", | |
2662 | [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] = | |
2663 | " err: PDOs should be in the following order: Fixed; Battery; Variable", | |
2664 | [PDO_ERR_FIXED_NOT_SORTED] = | |
2665 | " err: Fixed supply pdos should be in increasing order of their fixed voltage", | |
2666 | [PDO_ERR_VARIABLE_BATT_NOT_SORTED] = | |
2667 | " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage", | |
2668 | [PDO_ERR_DUPE_PDO] = | |
2669 | " err: Variable/Batt supply pdos cannot have same min/max voltage", | |
2eadc33f AT |
2670 | [PDO_ERR_PPS_APDO_NOT_SORTED] = |
2671 | " err: Programmable power supply apdos should be in increasing order of their maximum voltage", | |
2672 | [PDO_ERR_DUPE_PPS_APDO] = | |
2673 | " err: Programmable power supply apdos cannot have same min/max voltage and max current", | |
5007e1b5 BJS |
2674 | }; |
2675 | ||
2676 | static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo, | |
2677 | unsigned int nr_pdo) | |
2678 | { | |
2679 | unsigned int i; | |
2680 | ||
2681 | /* Should at least contain vSafe5v */ | |
2682 | if (nr_pdo < 1) | |
2683 | return PDO_ERR_NO_VSAFE5V; | |
2684 | ||
2685 | /* The vSafe5V Fixed Supply Object Shall always be the first object */ | |
2686 | if (pdo_type(pdo[0]) != PDO_TYPE_FIXED || | |
2687 | pdo_fixed_voltage(pdo[0]) != VSAFE5V) | |
2688 | return PDO_ERR_VSAFE5V_NOT_FIRST; | |
2689 | ||
2690 | for (i = 1; i < nr_pdo; i++) { | |
2691 | if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) { | |
2692 | return PDO_ERR_PDO_TYPE_NOT_IN_ORDER; | |
2693 | } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) { | |
2694 | enum pd_pdo_type type = pdo_type(pdo[i]); | |
2695 | ||
2696 | switch (type) { | |
2697 | /* | |
2698 | * The remaining Fixed Supply Objects, if | |
2699 | * present, shall be sent in voltage order; | |
2700 | * lowest to highest. | |
2701 | */ | |
2702 | case PDO_TYPE_FIXED: | |
2703 | if (pdo_fixed_voltage(pdo[i]) <= | |
2704 | pdo_fixed_voltage(pdo[i - 1])) | |
2705 | return PDO_ERR_FIXED_NOT_SORTED; | |
2706 | break; | |
2707 | /* | |
2708 | * The Battery Supply Objects and Variable | |
2709 | * supply, if present shall be sent in Minimum | |
2710 | * Voltage order; lowest to highest. | |
2711 | */ | |
2712 | case PDO_TYPE_VAR: | |
2713 | case PDO_TYPE_BATT: | |
2714 | if (pdo_min_voltage(pdo[i]) < | |
2715 | pdo_min_voltage(pdo[i - 1])) | |
2716 | return PDO_ERR_VARIABLE_BATT_NOT_SORTED; | |
2717 | else if ((pdo_min_voltage(pdo[i]) == | |
2718 | pdo_min_voltage(pdo[i - 1])) && | |
2719 | (pdo_max_voltage(pdo[i]) == | |
a684d8fd | 2720 | pdo_max_voltage(pdo[i - 1]))) |
5007e1b5 BJS |
2721 | return PDO_ERR_DUPE_PDO; |
2722 | break; | |
2eadc33f AT |
2723 | /* |
2724 | * The Programmable Power Supply APDOs, if present, | |
2725 | * shall be sent in Maximum Voltage order; | |
2726 | * lowest to highest. | |
2727 | */ | |
2728 | case PDO_TYPE_APDO: | |
2729 | if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS) | |
2730 | break; | |
2731 | ||
1b6af2f5 AT |
2732 | if (pdo_pps_apdo_max_voltage(pdo[i]) < |
2733 | pdo_pps_apdo_max_voltage(pdo[i - 1])) | |
2eadc33f AT |
2734 | return PDO_ERR_PPS_APDO_NOT_SORTED; |
2735 | else if (pdo_pps_apdo_min_voltage(pdo[i]) == | |
2736 | pdo_pps_apdo_min_voltage(pdo[i - 1]) && | |
2737 | pdo_pps_apdo_max_voltage(pdo[i]) == | |
2738 | pdo_pps_apdo_max_voltage(pdo[i - 1]) && | |
2739 | pdo_pps_apdo_max_current(pdo[i]) == | |
2740 | pdo_pps_apdo_max_current(pdo[i - 1])) | |
2741 | return PDO_ERR_DUPE_PPS_APDO; | |
2742 | break; | |
5007e1b5 BJS |
2743 | default: |
2744 | tcpm_log_force(port, " Unknown pdo type"); | |
2745 | } | |
2746 | } | |
2747 | } | |
2748 | ||
2749 | return PDO_NO_ERR; | |
2750 | } | |
2751 | ||
2752 | static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo, | |
2753 | unsigned int nr_pdo) | |
2754 | { | |
2755 | enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo); | |
2756 | ||
2757 | if (err_index != PDO_NO_ERR) { | |
2758 | tcpm_log_force(port, " %s", pdo_err_msg[err_index]); | |
2759 | return -EINVAL; | |
2760 | } | |
2761 | ||
2762 | return 0; | |
2763 | } | |
2764 | ||
8face9aa | 2765 | static int tcpm_altmode_enter(struct typec_altmode *altmode, u32 *vdo) |
e9576fe8 HK |
2766 | { |
2767 | struct tcpm_port *port = typec_altmode_get_drvdata(altmode); | |
5e1d4c49 | 2768 | int svdm_version; |
e9576fe8 HK |
2769 | u32 header; |
2770 | ||
5e1d4c49 KT |
2771 | svdm_version = typec_get_negotiated_svdm_version(port->typec_port); |
2772 | if (svdm_version < 0) | |
2773 | return svdm_version; | |
2774 | ||
2775 | header = VDO(altmode->svid, vdo ? 2 : 1, svdm_version, CMD_ENTER_MODE); | |
e9576fe8 HK |
2776 | header |= VDO_OPOS(altmode->mode); |
2777 | ||
7e7877c5 | 2778 | tcpm_queue_vdm_unlocked(port, header, vdo, vdo ? 1 : 0, TCPC_TX_SOP); |
e9576fe8 HK |
2779 | return 0; |
2780 | } | |
2781 | ||
2782 | static int tcpm_altmode_exit(struct typec_altmode *altmode) | |
2783 | { | |
2784 | struct tcpm_port *port = typec_altmode_get_drvdata(altmode); | |
5e1d4c49 | 2785 | int svdm_version; |
e9576fe8 HK |
2786 | u32 header; |
2787 | ||
5e1d4c49 KT |
2788 | svdm_version = typec_get_negotiated_svdm_version(port->typec_port); |
2789 | if (svdm_version < 0) | |
2790 | return svdm_version; | |
2791 | ||
2792 | header = VDO(altmode->svid, 1, svdm_version, CMD_EXIT_MODE); | |
e9576fe8 HK |
2793 | header |= VDO_OPOS(altmode->mode); |
2794 | ||
7e7877c5 | 2795 | tcpm_queue_vdm_unlocked(port, header, NULL, 0, TCPC_TX_SOP); |
e9576fe8 HK |
2796 | return 0; |
2797 | } | |
2798 | ||
2799 | static int tcpm_altmode_vdm(struct typec_altmode *altmode, | |
2800 | u32 header, const u32 *data, int count) | |
2801 | { | |
2802 | struct tcpm_port *port = typec_altmode_get_drvdata(altmode); | |
2803 | ||
7e7877c5 | 2804 | tcpm_queue_vdm_unlocked(port, header, data, count - 1, TCPC_TX_SOP); |
3ed8e1c2 | 2805 | |
e9576fe8 HK |
2806 | return 0; |
2807 | } | |
2808 | ||
2809 | static const struct typec_altmode_ops tcpm_altmode_ops = { | |
2810 | .enter = tcpm_altmode_enter, | |
2811 | .exit = tcpm_altmode_exit, | |
2812 | .vdm = tcpm_altmode_vdm, | |
2813 | }; | |
2814 | ||
7e7877c5 RB |
2815 | |
2816 | static int tcpm_cable_altmode_enter(struct typec_altmode *altmode, enum typec_plug_index sop, | |
2817 | u32 *vdo) | |
2818 | { | |
2819 | struct tcpm_port *port = typec_altmode_get_drvdata(altmode); | |
2820 | int svdm_version; | |
2821 | u32 header; | |
2822 | ||
2823 | svdm_version = typec_get_cable_svdm_version(port->typec_port); | |
2824 | if (svdm_version < 0) | |
2825 | return svdm_version; | |
2826 | ||
2827 | header = VDO(altmode->svid, vdo ? 2 : 1, svdm_version, CMD_ENTER_MODE); | |
2828 | header |= VDO_OPOS(altmode->mode); | |
2829 | ||
2830 | tcpm_queue_vdm_unlocked(port, header, vdo, vdo ? 1 : 0, TCPC_TX_SOP_PRIME); | |
2831 | return 0; | |
2832 | } | |
2833 | ||
2834 | static int tcpm_cable_altmode_exit(struct typec_altmode *altmode, enum typec_plug_index sop) | |
2835 | { | |
2836 | struct tcpm_port *port = typec_altmode_get_drvdata(altmode); | |
2837 | int svdm_version; | |
2838 | u32 header; | |
2839 | ||
2840 | svdm_version = typec_get_cable_svdm_version(port->typec_port); | |
2841 | if (svdm_version < 0) | |
2842 | return svdm_version; | |
2843 | ||
2844 | header = VDO(altmode->svid, 1, svdm_version, CMD_EXIT_MODE); | |
2845 | header |= VDO_OPOS(altmode->mode); | |
2846 | ||
2847 | tcpm_queue_vdm_unlocked(port, header, NULL, 0, TCPC_TX_SOP_PRIME); | |
2848 | return 0; | |
2849 | } | |
2850 | ||
2851 | static int tcpm_cable_altmode_vdm(struct typec_altmode *altmode, enum typec_plug_index sop, | |
2852 | u32 header, const u32 *data, int count) | |
2853 | { | |
2854 | struct tcpm_port *port = typec_altmode_get_drvdata(altmode); | |
2855 | ||
2856 | tcpm_queue_vdm_unlocked(port, header, data, count - 1, TCPC_TX_SOP_PRIME); | |
2857 | ||
2858 | return 0; | |
2859 | } | |
2860 | ||
2861 | static const struct typec_cable_ops tcpm_cable_ops = { | |
2862 | .enter = tcpm_cable_altmode_enter, | |
2863 | .exit = tcpm_cable_altmode_exit, | |
2864 | .vdm = tcpm_cable_altmode_vdm, | |
2865 | }; | |
2866 | ||
f0690a25 GR |
2867 | /* |
2868 | * PD (data, control) command handling functions | |
2869 | */ | |
64f7c494 AT |
2870 | static inline enum tcpm_state ready_state(struct tcpm_port *port) |
2871 | { | |
2872 | if (port->pwr_role == TYPEC_SOURCE) | |
2873 | return SRC_READY; | |
2874 | else | |
2875 | return SNK_READY; | |
2876 | } | |
2eadc33f AT |
2877 | |
2878 | static int tcpm_pd_send_control(struct tcpm_port *port, | |
6bd181ba RB |
2879 | enum pd_ctrl_msg_type type, |
2880 | enum tcpm_transmit_type tx_sop_type); | |
2eadc33f | 2881 | |
64f7c494 AT |
2882 | static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload, |
2883 | int cnt) | |
2884 | { | |
2885 | u32 p0 = le32_to_cpu(payload[0]); | |
2886 | unsigned int type = usb_pd_ado_type(p0); | |
2887 | ||
2888 | if (!type) { | |
2889 | tcpm_log(port, "Alert message received with no type"); | |
063933f4 | 2890 | tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); |
64f7c494 AT |
2891 | return; |
2892 | } | |
2893 | ||
2894 | /* Just handling non-battery alerts for now */ | |
2895 | if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) { | |
063933f4 KT |
2896 | if (port->pwr_role == TYPEC_SOURCE) { |
2897 | port->upcoming_state = GET_STATUS_SEND; | |
2898 | tcpm_ams_start(port, GETTING_SOURCE_SINK_STATUS); | |
2899 | } else { | |
2900 | /* | |
2901 | * Do not check SinkTxOk here in case the Source doesn't set its Rp to | |
2902 | * SinkTxOk in time. | |
2903 | */ | |
2904 | port->ams = GETTING_SOURCE_SINK_STATUS; | |
64f7c494 | 2905 | tcpm_set_state(port, GET_STATUS_SEND, 0); |
64f7c494 | 2906 | } |
063933f4 KT |
2907 | } else { |
2908 | tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); | |
64f7c494 AT |
2909 | } |
2910 | } | |
2911 | ||
f321a02c BJS |
2912 | static int tcpm_set_auto_vbus_discharge_threshold(struct tcpm_port *port, |
2913 | enum typec_pwr_opmode mode, bool pps_active, | |
2914 | u32 requested_vbus_voltage) | |
2915 | { | |
2916 | int ret; | |
2917 | ||
2918 | if (!port->tcpc->set_auto_vbus_discharge_threshold) | |
2919 | return 0; | |
2920 | ||
2921 | ret = port->tcpc->set_auto_vbus_discharge_threshold(port->tcpc, mode, pps_active, | |
2922 | requested_vbus_voltage); | |
2923 | tcpm_log_force(port, | |
2924 | "set_auto_vbus_discharge_threshold mode:%d pps_active:%c vbus:%u ret:%d", | |
2925 | mode, pps_active ? 'y' : 'n', requested_vbus_voltage, ret); | |
2926 | ||
2927 | return ret; | |
2928 | } | |
2929 | ||
8dea75e1 KT |
2930 | static void tcpm_pd_handle_state(struct tcpm_port *port, |
2931 | enum tcpm_state state, | |
2932 | enum tcpm_ams ams, | |
2933 | unsigned int delay_ms) | |
2934 | { | |
2935 | switch (port->state) { | |
2936 | case SRC_READY: | |
2937 | case SNK_READY: | |
2938 | port->ams = ams; | |
2939 | tcpm_set_state(port, state, delay_ms); | |
2940 | break; | |
2941 | /* 8.3.3.4.1.1 and 6.8.1 power transitioning */ | |
2942 | case SNK_TRANSITION_SINK: | |
2943 | case SNK_TRANSITION_SINK_VBUS: | |
2944 | case SRC_TRANSITION_SUPPLY: | |
2945 | tcpm_set_state(port, HARD_RESET_SEND, 0); | |
2946 | break; | |
2947 | default: | |
2948 | if (!tcpm_ams_interruptible(port)) { | |
2949 | tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ? | |
2950 | SRC_SOFT_RESET_WAIT_SNK_TX : | |
2951 | SNK_SOFT_RESET, | |
2952 | 0); | |
2953 | } else { | |
2954 | /* process the Message 6.8.1 */ | |
2955 | port->upcoming_state = state; | |
2956 | port->next_ams = ams; | |
2957 | tcpm_set_state(port, ready_state(port), delay_ms); | |
2958 | } | |
2959 | break; | |
2960 | } | |
2961 | } | |
2962 | ||
2963 | static void tcpm_pd_handle_msg(struct tcpm_port *port, | |
2964 | enum pd_msg_request message, | |
2965 | enum tcpm_ams ams) | |
2966 | { | |
2967 | switch (port->state) { | |
2968 | case SRC_READY: | |
2969 | case SNK_READY: | |
2970 | port->ams = ams; | |
2971 | tcpm_queue_message(port, message); | |
2972 | break; | |
2973 | /* PD 3.0 Spec 8.3.3.4.1.1 and 6.8.1 */ | |
2974 | case SNK_TRANSITION_SINK: | |
2975 | case SNK_TRANSITION_SINK_VBUS: | |
2976 | case SRC_TRANSITION_SUPPLY: | |
2977 | tcpm_set_state(port, HARD_RESET_SEND, 0); | |
2978 | break; | |
2979 | default: | |
2980 | if (!tcpm_ams_interruptible(port)) { | |
2981 | tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ? | |
2982 | SRC_SOFT_RESET_WAIT_SNK_TX : | |
2983 | SNK_SOFT_RESET, | |
2984 | 0); | |
2985 | } else { | |
2986 | port->next_ams = ams; | |
2987 | tcpm_set_state(port, ready_state(port), 0); | |
2988 | /* 6.8.1 process the Message */ | |
2989 | tcpm_queue_message(port, message); | |
2990 | } | |
2991 | break; | |
2992 | } | |
2993 | } | |
2994 | ||
8203d269 HK |
2995 | static int tcpm_register_source_caps(struct tcpm_port *port) |
2996 | { | |
2997 | struct usb_power_delivery_desc desc = { port->negotiated_rev }; | |
2998 | struct usb_power_delivery_capabilities_desc caps = { }; | |
2999 | struct usb_power_delivery_capabilities *cap; | |
3000 | ||
3001 | if (!port->partner_pd) | |
3002 | port->partner_pd = usb_power_delivery_register(NULL, &desc); | |
3003 | if (IS_ERR(port->partner_pd)) | |
3004 | return PTR_ERR(port->partner_pd); | |
3005 | ||
3006 | memcpy(caps.pdo, port->source_caps, sizeof(u32) * port->nr_source_caps); | |
3007 | caps.role = TYPEC_SOURCE; | |
3008 | ||
3009 | cap = usb_power_delivery_register_capabilities(port->partner_pd, &caps); | |
3010 | if (IS_ERR(cap)) | |
3011 | return PTR_ERR(cap); | |
3012 | ||
3013 | port->partner_source_caps = cap; | |
3014 | ||
3015 | return 0; | |
3016 | } | |
3017 | ||
3018 | static int tcpm_register_sink_caps(struct tcpm_port *port) | |
3019 | { | |
3020 | struct usb_power_delivery_desc desc = { port->negotiated_rev }; | |
3021 | struct usb_power_delivery_capabilities_desc caps = { }; | |
3022 | struct usb_power_delivery_capabilities *cap; | |
3023 | ||
3024 | if (!port->partner_pd) | |
3025 | port->partner_pd = usb_power_delivery_register(NULL, &desc); | |
3026 | if (IS_ERR(port->partner_pd)) | |
3027 | return PTR_ERR(port->partner_pd); | |
3028 | ||
3029 | memcpy(caps.pdo, port->sink_caps, sizeof(u32) * port->nr_sink_caps); | |
3030 | caps.role = TYPEC_SINK; | |
3031 | ||
3032 | cap = usb_power_delivery_register_capabilities(port->partner_pd, &caps); | |
3033 | if (IS_ERR(cap)) | |
3034 | return PTR_ERR(cap); | |
3035 | ||
3036 | port->partner_sink_caps = cap; | |
3037 | ||
3038 | return 0; | |
3039 | } | |
3040 | ||
f0690a25 | 3041 | static void tcpm_pd_data_request(struct tcpm_port *port, |
fb7ff25a RB |
3042 | const struct pd_message *msg, |
3043 | enum tcpm_transmit_type rx_sop_type) | |
f0690a25 GR |
3044 | { |
3045 | enum pd_data_msg_type type = pd_header_type_le(msg->header); | |
3046 | unsigned int cnt = pd_header_cnt_le(msg->header); | |
2eadc33f | 3047 | unsigned int rev = pd_header_rev_le(msg->header); |
f0690a25 | 3048 | unsigned int i; |
8115240c | 3049 | enum frs_typec_current partner_frs_current; |
8dc4bd07 BJS |
3050 | bool frs_enable; |
3051 | int ret; | |
f0690a25 | 3052 | |
0bc3ee92 KT |
3053 | if (tcpm_vdm_ams(port) && type != PD_DATA_VENDOR_DEF) { |
3054 | port->vdm_state = VDM_STATE_ERR_BUSY; | |
3055 | tcpm_ams_finish(port); | |
3056 | mod_vdm_delayed_work(port, 0); | |
3057 | } | |
3058 | ||
f0690a25 GR |
3059 | switch (type) { |
3060 | case PD_DATA_SOURCE_CAP: | |
f0690a25 GR |
3061 | for (i = 0; i < cnt; i++) |
3062 | port->source_caps[i] = le32_to_cpu(msg->payload[i]); | |
3063 | ||
3064 | port->nr_source_caps = cnt; | |
3065 | ||
3066 | tcpm_log_source_caps(port); | |
3067 | ||
5007e1b5 BJS |
3068 | tcpm_validate_caps(port, port->source_caps, |
3069 | port->nr_source_caps); | |
3070 | ||
8203d269 HK |
3071 | tcpm_register_source_caps(port); |
3072 | ||
2eadc33f AT |
3073 | /* |
3074 | * Adjust revision in subsequent message headers, as required, | |
3075 | * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't | |
3076 | * support Rev 1.0 so just do nothing in that scenario. | |
3077 | */ | |
8dea75e1 KT |
3078 | if (rev == PD_REV10) { |
3079 | if (port->ams == GET_SOURCE_CAPABILITIES) | |
3080 | tcpm_ams_finish(port); | |
2eadc33f | 3081 | break; |
8dea75e1 | 3082 | } |
2eadc33f | 3083 | |
fb7ff25a | 3084 | if (rev < PD_MAX_REV) { |
2eadc33f | 3085 | port->negotiated_rev = rev; |
fb7ff25a RB |
3086 | if (port->negotiated_rev_prime > port->negotiated_rev) |
3087 | port->negotiated_rev_prime = port->negotiated_rev; | |
3088 | } | |
2eadc33f | 3089 | |
8dea75e1 KT |
3090 | if (port->pwr_role == TYPEC_SOURCE) { |
3091 | if (port->ams == GET_SOURCE_CAPABILITIES) | |
3092 | tcpm_pd_handle_state(port, SRC_READY, NONE_AMS, 0); | |
3093 | /* Unexpected Source Capabilities */ | |
3094 | else | |
3095 | tcpm_pd_handle_msg(port, | |
3096 | port->negotiated_rev < PD_REV30 ? | |
3097 | PD_MSG_CTRL_REJECT : | |
3098 | PD_MSG_CTRL_NOT_SUPP, | |
3099 | NONE_AMS); | |
3100 | } else if (port->state == SNK_WAIT_CAPABILITIES) { | |
f0690a25 GR |
3101 | /* |
3102 | * This message may be received even if VBUS is not | |
3103 | * present. This is quite unexpected; see USB PD | |
3104 | * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2. | |
3105 | * However, at the same time, we must be ready to | |
3106 | * receive this message and respond to it 15ms after | |
3107 | * receiving PS_RDY during power swap operations, no matter | |
3108 | * if VBUS is available or not (USB PD specification, | |
3109 | * section 6.5.9.2). | |
3110 | * So we need to accept the message either way, | |
3111 | * but be prepared to keep waiting for VBUS after it was | |
3112 | * handled. | |
3113 | */ | |
8dea75e1 | 3114 | port->ams = POWER_NEGOTIATION; |
2b8ff93f | 3115 | port->in_ams = true; |
8dea75e1 KT |
3116 | tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); |
3117 | } else { | |
3118 | if (port->ams == GET_SOURCE_CAPABILITIES) | |
3119 | tcpm_ams_finish(port); | |
3120 | tcpm_pd_handle_state(port, SNK_NEGOTIATE_CAPABILITIES, | |
3121 | POWER_NEGOTIATION, 0); | |
3122 | } | |
f0690a25 GR |
3123 | break; |
3124 | case PD_DATA_REQUEST: | |
2eadc33f AT |
3125 | /* |
3126 | * Adjust revision in subsequent message headers, as required, | |
3127 | * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't | |
3128 | * support Rev 1.0 so just reject in that scenario. | |
3129 | */ | |
3130 | if (rev == PD_REV10) { | |
8dea75e1 KT |
3131 | tcpm_pd_handle_msg(port, |
3132 | port->negotiated_rev < PD_REV30 ? | |
3133 | PD_MSG_CTRL_REJECT : | |
3134 | PD_MSG_CTRL_NOT_SUPP, | |
3135 | NONE_AMS); | |
2eadc33f AT |
3136 | break; |
3137 | } | |
3138 | ||
fb7ff25a | 3139 | if (rev < PD_MAX_REV) { |
2eadc33f | 3140 | port->negotiated_rev = rev; |
fb7ff25a RB |
3141 | if (port->negotiated_rev_prime > port->negotiated_rev) |
3142 | port->negotiated_rev_prime = port->negotiated_rev; | |
3143 | } | |
2eadc33f | 3144 | |
8dea75e1 KT |
3145 | if (port->pwr_role != TYPEC_SOURCE || cnt != 1) { |
3146 | tcpm_pd_handle_msg(port, | |
3147 | port->negotiated_rev < PD_REV30 ? | |
3148 | PD_MSG_CTRL_REJECT : | |
3149 | PD_MSG_CTRL_NOT_SUPP, | |
3150 | NONE_AMS); | |
3151 | break; | |
3152 | } | |
3153 | ||
f0690a25 | 3154 | port->sink_request = le32_to_cpu(msg->payload[0]); |
8d3a0578 KT |
3155 | |
3156 | if (port->vdm_sm_running && port->explicit_contract) { | |
3157 | tcpm_pd_handle_msg(port, PD_MSG_CTRL_WAIT, port->ams); | |
3158 | break; | |
3159 | } | |
3160 | ||
8dea75e1 KT |
3161 | if (port->state == SRC_SEND_CAPABILITIES) |
3162 | tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0); | |
3163 | else | |
3164 | tcpm_pd_handle_state(port, SRC_NEGOTIATE_CAPABILITIES, | |
3165 | POWER_NEGOTIATION, 0); | |
f0690a25 GR |
3166 | break; |
3167 | case PD_DATA_SINK_CAP: | |
3168 | /* We don't do anything with this at the moment... */ | |
3169 | for (i = 0; i < cnt; i++) | |
3170 | port->sink_caps[i] = le32_to_cpu(msg->payload[i]); | |
8dc4bd07 | 3171 | |
8115240c | 3172 | partner_frs_current = (port->sink_caps[0] & PDO_FIXED_FRS_CURR_MASK) >> |
8dc4bd07 | 3173 | PDO_FIXED_FRS_CURR_SHIFT; |
8115240c BJS |
3174 | frs_enable = partner_frs_current && (partner_frs_current <= |
3175 | port->new_source_frs_current); | |
8dc4bd07 BJS |
3176 | tcpm_log(port, |
3177 | "Port partner FRS capable partner_frs_current:%u port_frs_current:%u enable:%c", | |
8115240c | 3178 | partner_frs_current, port->new_source_frs_current, frs_enable ? 'y' : 'n'); |
8dc4bd07 BJS |
3179 | if (frs_enable) { |
3180 | ret = port->tcpc->enable_frs(port->tcpc, true); | |
3181 | tcpm_log(port, "Enable FRS %s, ret:%d\n", ret ? "fail" : "success", ret); | |
3182 | } | |
3183 | ||
f0690a25 | 3184 | port->nr_sink_caps = cnt; |
8dc4bd07 | 3185 | port->sink_cap_done = true; |
8203d269 HK |
3186 | tcpm_register_sink_caps(port); |
3187 | ||
8dea75e1 | 3188 | if (port->ams == GET_SINK_CAPABILITIES) |
2e2b8d15 | 3189 | tcpm_set_state(port, ready_state(port), 0); |
8dea75e1 KT |
3190 | /* Unexpected Sink Capabilities */ |
3191 | else | |
3192 | tcpm_pd_handle_msg(port, | |
3193 | port->negotiated_rev < PD_REV30 ? | |
3194 | PD_MSG_CTRL_REJECT : | |
3195 | PD_MSG_CTRL_NOT_SUPP, | |
3196 | NONE_AMS); | |
f0690a25 GR |
3197 | break; |
3198 | case PD_DATA_VENDOR_DEF: | |
fb7ff25a | 3199 | tcpm_handle_vdm_request(port, msg->payload, cnt, rx_sop_type); |
f0690a25 GR |
3200 | break; |
3201 | case PD_DATA_BIST: | |
8dea75e1 KT |
3202 | port->bist_request = le32_to_cpu(msg->payload[0]); |
3203 | tcpm_pd_handle_state(port, BIST_RX, BIST, 0); | |
f0690a25 | 3204 | break; |
64f7c494 | 3205 | case PD_DATA_ALERT: |
063933f4 KT |
3206 | if (port->state != SRC_READY && port->state != SNK_READY) |
3207 | tcpm_pd_handle_state(port, port->pwr_role == TYPEC_SOURCE ? | |
3208 | SRC_SOFT_RESET_WAIT_SNK_TX : SNK_SOFT_RESET, | |
3209 | NONE_AMS, 0); | |
3210 | else | |
3211 | tcpm_handle_alert(port, msg->payload, cnt); | |
64f7c494 AT |
3212 | break; |
3213 | case PD_DATA_BATT_STATUS: | |
3214 | case PD_DATA_GET_COUNTRY_INFO: | |
3215 | /* Currently unsupported */ | |
8dea75e1 KT |
3216 | tcpm_pd_handle_msg(port, port->negotiated_rev < PD_REV30 ? |
3217 | PD_MSG_CTRL_REJECT : | |
3218 | PD_MSG_CTRL_NOT_SUPP, | |
3219 | NONE_AMS); | |
64f7c494 | 3220 | break; |
f0690a25 | 3221 | default: |
8dea75e1 KT |
3222 | tcpm_pd_handle_msg(port, port->negotiated_rev < PD_REV30 ? |
3223 | PD_MSG_CTRL_REJECT : | |
3224 | PD_MSG_CTRL_NOT_SUPP, | |
3225 | NONE_AMS); | |
3226 | tcpm_log(port, "Unrecognized data message type %#x", type); | |
f0690a25 GR |
3227 | break; |
3228 | } | |
3229 | } | |
3230 | ||
2eadc33f AT |
3231 | static void tcpm_pps_complete(struct tcpm_port *port, int result) |
3232 | { | |
3233 | if (port->pps_pending) { | |
3234 | port->pps_status = result; | |
3235 | port->pps_pending = false; | |
3236 | complete(&port->pps_complete); | |
3237 | } | |
3238 | } | |
3239 | ||
f0690a25 | 3240 | static void tcpm_pd_ctrl_request(struct tcpm_port *port, |
6bd181ba RB |
3241 | const struct pd_message *msg, |
3242 | enum tcpm_transmit_type rx_sop_type) | |
f0690a25 GR |
3243 | { |
3244 | enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); | |
3245 | enum tcpm_state next_state; | |
6bd181ba | 3246 | unsigned int rev = pd_header_rev_le(msg->header); |
f0690a25 | 3247 | |
0bc3ee92 KT |
3248 | /* |
3249 | * Stop VDM state machine if interrupted by other Messages while NOT_SUPP is allowed in | |
3250 | * VDM AMS if waiting for VDM responses and will be handled later. | |
3251 | */ | |
3252 | if (tcpm_vdm_ams(port) && type != PD_CTRL_NOT_SUPP && type != PD_CTRL_GOOD_CRC) { | |
3253 | port->vdm_state = VDM_STATE_ERR_BUSY; | |
3254 | tcpm_ams_finish(port); | |
3255 | mod_vdm_delayed_work(port, 0); | |
3256 | } | |
3257 | ||
f0690a25 GR |
3258 | switch (type) { |
3259 | case PD_CTRL_GOOD_CRC: | |
3260 | case PD_CTRL_PING: | |
3261 | break; | |
3262 | case PD_CTRL_GET_SOURCE_CAP: | |
8dea75e1 | 3263 | tcpm_pd_handle_msg(port, PD_MSG_DATA_SOURCE_CAP, GET_SOURCE_CAPABILITIES); |
f0690a25 GR |
3264 | break; |
3265 | case PD_CTRL_GET_SINK_CAP: | |
8dea75e1 | 3266 | tcpm_pd_handle_msg(port, PD_MSG_DATA_SINK_CAP, GET_SINK_CAPABILITIES); |
f0690a25 GR |
3267 | break; |
3268 | case PD_CTRL_GOTO_MIN: | |
3269 | break; | |
3270 | case PD_CTRL_PS_RDY: | |
3271 | switch (port->state) { | |
3272 | case SNK_TRANSITION_SINK: | |
3273 | if (port->vbus_present) { | |
3274 | tcpm_set_current_limit(port, | |
f3dedafb BJS |
3275 | port->req_current_limit, |
3276 | port->req_supply_voltage); | |
8bf05746 | 3277 | port->explicit_contract = true; |
f321a02c BJS |
3278 | tcpm_set_auto_vbus_discharge_threshold(port, |
3279 | TYPEC_PWR_MODE_PD, | |
3280 | port->pps_data.active, | |
3281 | port->supply_voltage); | |
f0690a25 GR |
3282 | tcpm_set_state(port, SNK_READY, 0); |
3283 | } else { | |
3284 | /* | |
3285 | * Seen after power swap. Keep waiting for VBUS | |
3286 | * in a transitional state. | |
3287 | */ | |
3288 | tcpm_set_state(port, | |
3289 | SNK_TRANSITION_SINK_VBUS, 0); | |
3290 | } | |
3291 | break; | |
b965b631 | 3292 | case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: |
f0690a25 GR |
3293 | tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0); |
3294 | break; | |
3295 | case PR_SWAP_SNK_SRC_SINK_OFF: | |
3296 | tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0); | |
3297 | break; | |
3298 | case VCONN_SWAP_WAIT_FOR_VCONN: | |
3299 | tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0); | |
3300 | break; | |
8dc4bd07 BJS |
3301 | case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF: |
3302 | tcpm_set_state(port, FR_SWAP_SNK_SRC_NEW_SINK_READY, 0); | |
3303 | break; | |
f0690a25 | 3304 | default: |
8dea75e1 KT |
3305 | tcpm_pd_handle_state(port, |
3306 | port->pwr_role == TYPEC_SOURCE ? | |
3307 | SRC_SOFT_RESET_WAIT_SNK_TX : | |
3308 | SNK_SOFT_RESET, | |
3309 | NONE_AMS, 0); | |
f0690a25 GR |
3310 | break; |
3311 | } | |
3312 | break; | |
3313 | case PD_CTRL_REJECT: | |
3314 | case PD_CTRL_WAIT: | |
64f7c494 | 3315 | case PD_CTRL_NOT_SUPP: |
f0690a25 GR |
3316 | switch (port->state) { |
3317 | case SNK_NEGOTIATE_CAPABILITIES: | |
3318 | /* USB PD specification, Figure 8-43 */ | |
ef52b4a9 | 3319 | if (port->explicit_contract) |
f0690a25 | 3320 | next_state = SNK_READY; |
ef52b4a9 | 3321 | else |
f0690a25 | 3322 | next_state = SNK_WAIT_CAPABILITIES; |
2b537cf8 KT |
3323 | |
3324 | /* Threshold was relaxed before sending Request. Restore it back. */ | |
3325 | tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD, | |
3326 | port->pps_data.active, | |
3327 | port->supply_voltage); | |
f0690a25 GR |
3328 | tcpm_set_state(port, next_state, 0); |
3329 | break; | |
2eadc33f AT |
3330 | case SNK_NEGOTIATE_PPS_CAPABILITIES: |
3331 | /* Revert data back from any requested PPS updates */ | |
e3a07202 BJS |
3332 | port->pps_data.req_out_volt = port->supply_voltage; |
3333 | port->pps_data.req_op_curr = port->current_limit; | |
2eadc33f AT |
3334 | port->pps_status = (type == PD_CTRL_WAIT ? |
3335 | -EAGAIN : -EOPNOTSUPP); | |
8d3a0578 | 3336 | |
2b537cf8 KT |
3337 | /* Threshold was relaxed before sending Request. Restore it back. */ |
3338 | tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD, | |
3339 | port->pps_data.active, | |
3340 | port->supply_voltage); | |
3341 | ||
2eadc33f AT |
3342 | tcpm_set_state(port, SNK_READY, 0); |
3343 | break; | |
f0690a25 GR |
3344 | case DR_SWAP_SEND: |
3345 | port->swap_status = (type == PD_CTRL_WAIT ? | |
3346 | -EAGAIN : -EOPNOTSUPP); | |
3347 | tcpm_set_state(port, DR_SWAP_CANCEL, 0); | |
3348 | break; | |
3349 | case PR_SWAP_SEND: | |
3350 | port->swap_status = (type == PD_CTRL_WAIT ? | |
3351 | -EAGAIN : -EOPNOTSUPP); | |
3352 | tcpm_set_state(port, PR_SWAP_CANCEL, 0); | |
3353 | break; | |
3354 | case VCONN_SWAP_SEND: | |
3355 | port->swap_status = (type == PD_CTRL_WAIT ? | |
3356 | -EAGAIN : -EOPNOTSUPP); | |
3357 | tcpm_set_state(port, VCONN_SWAP_CANCEL, 0); | |
3358 | break; | |
8dc4bd07 BJS |
3359 | case FR_SWAP_SEND: |
3360 | tcpm_set_state(port, FR_SWAP_CANCEL, 0); | |
3361 | break; | |
3362 | case GET_SINK_CAP: | |
3363 | port->sink_cap_done = true; | |
3364 | tcpm_set_state(port, ready_state(port), 0); | |
3365 | break; | |
78e0ea42 BJS |
3366 | /* |
3367 | * Some port partners do not support GET_STATUS, avoid soft reset the link to | |
3368 | * prevent redundant power re-negotiation | |
3369 | */ | |
3370 | case GET_STATUS_SEND: | |
3371 | tcpm_set_state(port, ready_state(port), 0); | |
3372 | break; | |
f1fbd950 KT |
3373 | case SRC_READY: |
3374 | case SNK_READY: | |
3375 | if (port->vdm_state > VDM_STATE_READY) { | |
3376 | port->vdm_state = VDM_STATE_DONE; | |
3377 | if (tcpm_vdm_ams(port)) | |
3378 | tcpm_ams_finish(port); | |
3379 | mod_vdm_delayed_work(port, 0); | |
3380 | break; | |
3381 | } | |
3382 | fallthrough; | |
f0690a25 | 3383 | default: |
8dea75e1 KT |
3384 | tcpm_pd_handle_state(port, |
3385 | port->pwr_role == TYPEC_SOURCE ? | |
3386 | SRC_SOFT_RESET_WAIT_SNK_TX : | |
3387 | SNK_SOFT_RESET, | |
3388 | NONE_AMS, 0); | |
f0690a25 GR |
3389 | break; |
3390 | } | |
3391 | break; | |
3392 | case PD_CTRL_ACCEPT: | |
3393 | switch (port->state) { | |
3394 | case SNK_NEGOTIATE_CAPABILITIES: | |
2eadc33f AT |
3395 | port->pps_data.active = false; |
3396 | tcpm_set_state(port, SNK_TRANSITION_SINK, 0); | |
3397 | break; | |
3398 | case SNK_NEGOTIATE_PPS_CAPABILITIES: | |
3399 | port->pps_data.active = true; | |
e3a07202 BJS |
3400 | port->pps_data.min_volt = port->pps_data.req_min_volt; |
3401 | port->pps_data.max_volt = port->pps_data.req_max_volt; | |
3402 | port->pps_data.max_curr = port->pps_data.req_max_curr; | |
3403 | port->req_supply_voltage = port->pps_data.req_out_volt; | |
3404 | port->req_current_limit = port->pps_data.req_op_curr; | |
4050f268 | 3405 | power_supply_changed(port->psy); |
f0690a25 GR |
3406 | tcpm_set_state(port, SNK_TRANSITION_SINK, 0); |
3407 | break; | |
3408 | case SOFT_RESET_SEND: | |
0908c5ac KT |
3409 | if (port->ams == SOFT_RESET_AMS) |
3410 | tcpm_ams_finish(port); | |
6bd181ba RB |
3411 | /* |
3412 | * SOP' Soft Reset is done after Vconn Swap, | |
3413 | * which returns to ready state | |
3414 | */ | |
3415 | if (rx_sop_type == TCPC_TX_SOP_PRIME) { | |
3416 | if (rev < port->negotiated_rev_prime) | |
3417 | port->negotiated_rev_prime = rev; | |
3418 | tcpm_set_state(port, ready_state(port), 0); | |
3419 | break; | |
3420 | } | |
0908c5ac KT |
3421 | if (port->pwr_role == TYPEC_SOURCE) { |
3422 | port->upcoming_state = SRC_SEND_CAPABILITIES; | |
3423 | tcpm_ams_start(port, POWER_NEGOTIATION); | |
3424 | } else { | |
3425 | tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); | |
3426 | } | |
f0690a25 GR |
3427 | break; |
3428 | case DR_SWAP_SEND: | |
3429 | tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0); | |
3430 | break; | |
3431 | case PR_SWAP_SEND: | |
3432 | tcpm_set_state(port, PR_SWAP_START, 0); | |
3433 | break; | |
3434 | case VCONN_SWAP_SEND: | |
3435 | tcpm_set_state(port, VCONN_SWAP_START, 0); | |
3436 | break; | |
8dc4bd07 BJS |
3437 | case FR_SWAP_SEND: |
3438 | tcpm_set_state(port, FR_SWAP_SNK_SRC_TRANSITION_TO_OFF, 0); | |
3439 | break; | |
f0690a25 | 3440 | default: |
8dea75e1 KT |
3441 | tcpm_pd_handle_state(port, |
3442 | port->pwr_role == TYPEC_SOURCE ? | |
3443 | SRC_SOFT_RESET_WAIT_SNK_TX : | |
3444 | SNK_SOFT_RESET, | |
3445 | NONE_AMS, 0); | |
f0690a25 GR |
3446 | break; |
3447 | } | |
3448 | break; | |
3449 | case PD_CTRL_SOFT_RESET: | |
8dea75e1 | 3450 | port->ams = SOFT_RESET_AMS; |
f0690a25 GR |
3451 | tcpm_set_state(port, SOFT_RESET, 0); |
3452 | break; | |
3453 | case PD_CTRL_DR_SWAP: | |
f0690a25 GR |
3454 | /* |
3455 | * XXX | |
3456 | * 6.3.9: If an alternate mode is active, a request to swap | |
3457 | * alternate modes shall trigger a port reset. | |
3458 | */ | |
8d3a0578 | 3459 | if (port->typec_caps.data != TYPEC_PORT_DRD) { |
8dea75e1 KT |
3460 | tcpm_pd_handle_msg(port, |
3461 | port->negotiated_rev < PD_REV30 ? | |
3462 | PD_MSG_CTRL_REJECT : | |
3463 | PD_MSG_CTRL_NOT_SUPP, | |
3464 | NONE_AMS); | |
8d3a0578 | 3465 | } else { |
e0cc05d5 | 3466 | if (port->send_discover && port->negotiated_rev < PD_REV30) { |
8d3a0578 KT |
3467 | tcpm_queue_message(port, PD_MSG_CTRL_WAIT); |
3468 | break; | |
3469 | } | |
3470 | ||
8dea75e1 | 3471 | tcpm_pd_handle_state(port, DR_SWAP_ACCEPT, DATA_ROLE_SWAP, 0); |
8d3a0578 | 3472 | } |
f0690a25 GR |
3473 | break; |
3474 | case PD_CTRL_PR_SWAP: | |
8d3a0578 | 3475 | if (port->port_type != TYPEC_PORT_DRP) { |
8dea75e1 KT |
3476 | tcpm_pd_handle_msg(port, |
3477 | port->negotiated_rev < PD_REV30 ? | |
3478 | PD_MSG_CTRL_REJECT : | |
3479 | PD_MSG_CTRL_NOT_SUPP, | |
3480 | NONE_AMS); | |
8d3a0578 | 3481 | } else { |
e0cc05d5 | 3482 | if (port->send_discover && port->negotiated_rev < PD_REV30) { |
8d3a0578 KT |
3483 | tcpm_queue_message(port, PD_MSG_CTRL_WAIT); |
3484 | break; | |
3485 | } | |
3486 | ||
8dea75e1 | 3487 | tcpm_pd_handle_state(port, PR_SWAP_ACCEPT, POWER_ROLE_SWAP, 0); |
8d3a0578 | 3488 | } |
f0690a25 GR |
3489 | break; |
3490 | case PD_CTRL_VCONN_SWAP: | |
e0cc05d5 | 3491 | if (port->send_discover && port->negotiated_rev < PD_REV30) { |
8d3a0578 KT |
3492 | tcpm_queue_message(port, PD_MSG_CTRL_WAIT); |
3493 | break; | |
3494 | } | |
3495 | ||
8dea75e1 | 3496 | tcpm_pd_handle_state(port, VCONN_SWAP_ACCEPT, VCONN_SWAP, 0); |
f0690a25 | 3497 | break; |
64f7c494 AT |
3498 | case PD_CTRL_GET_SOURCE_CAP_EXT: |
3499 | case PD_CTRL_GET_STATUS: | |
3500 | case PD_CTRL_FR_SWAP: | |
3501 | case PD_CTRL_GET_PPS_STATUS: | |
3502 | case PD_CTRL_GET_COUNTRY_CODES: | |
3503 | /* Currently not supported */ | |
8dea75e1 KT |
3504 | tcpm_pd_handle_msg(port, |
3505 | port->negotiated_rev < PD_REV30 ? | |
3506 | PD_MSG_CTRL_REJECT : | |
3507 | PD_MSG_CTRL_NOT_SUPP, | |
3508 | NONE_AMS); | |
64f7c494 | 3509 | break; |
f0690a25 | 3510 | default: |
8dea75e1 KT |
3511 | tcpm_pd_handle_msg(port, |
3512 | port->negotiated_rev < PD_REV30 ? | |
3513 | PD_MSG_CTRL_REJECT : | |
3514 | PD_MSG_CTRL_NOT_SUPP, | |
3515 | NONE_AMS); | |
3516 | tcpm_log(port, "Unrecognized ctrl message type %#x", type); | |
f0690a25 GR |
3517 | break; |
3518 | } | |
3519 | } | |
3520 | ||
64f7c494 AT |
3521 | static void tcpm_pd_ext_msg_request(struct tcpm_port *port, |
3522 | const struct pd_message *msg) | |
3523 | { | |
3524 | enum pd_ext_msg_type type = pd_header_type_le(msg->header); | |
3525 | unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header); | |
3526 | ||
0bc3ee92 KT |
3527 | /* stopping VDM state machine if interrupted by other Messages */ |
3528 | if (tcpm_vdm_ams(port)) { | |
3529 | port->vdm_state = VDM_STATE_ERR_BUSY; | |
3530 | tcpm_ams_finish(port); | |
3531 | mod_vdm_delayed_work(port, 0); | |
3532 | } | |
3533 | ||
c58bbe34 | 3534 | if (!(le16_to_cpu(msg->ext_msg.header) & PD_EXT_HDR_CHUNKED)) { |
8dea75e1 | 3535 | tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS); |
64f7c494 AT |
3536 | tcpm_log(port, "Unchunked extended messages unsupported"); |
3537 | return; | |
3538 | } | |
3539 | ||
3540 | if (data_size > PD_EXT_MAX_CHUNK_DATA) { | |
8dea75e1 | 3541 | tcpm_pd_handle_state(port, CHUNK_NOT_SUPP, NONE_AMS, PD_T_CHUNK_NOT_SUPP); |
64f7c494 AT |
3542 | tcpm_log(port, "Chunk handling not yet supported"); |
3543 | return; | |
3544 | } | |
3545 | ||
3546 | switch (type) { | |
3547 | case PD_EXT_STATUS: | |
64f7c494 | 3548 | case PD_EXT_PPS_STATUS: |
063933f4 KT |
3549 | if (port->ams == GETTING_SOURCE_SINK_STATUS) { |
3550 | tcpm_ams_finish(port); | |
3551 | tcpm_set_state(port, ready_state(port), 0); | |
3552 | } else { | |
3553 | /* unexpected Status or PPS_Status Message */ | |
3554 | tcpm_pd_handle_state(port, port->pwr_role == TYPEC_SOURCE ? | |
3555 | SRC_SOFT_RESET_WAIT_SNK_TX : SNK_SOFT_RESET, | |
3556 | NONE_AMS, 0); | |
3557 | } | |
64f7c494 AT |
3558 | break; |
3559 | case PD_EXT_SOURCE_CAP_EXT: | |
3560 | case PD_EXT_GET_BATT_CAP: | |
3561 | case PD_EXT_GET_BATT_STATUS: | |
3562 | case PD_EXT_BATT_CAP: | |
3563 | case PD_EXT_GET_MANUFACTURER_INFO: | |
3564 | case PD_EXT_MANUFACTURER_INFO: | |
3565 | case PD_EXT_SECURITY_REQUEST: | |
3566 | case PD_EXT_SECURITY_RESPONSE: | |
3567 | case PD_EXT_FW_UPDATE_REQUEST: | |
3568 | case PD_EXT_FW_UPDATE_RESPONSE: | |
3569 | case PD_EXT_COUNTRY_INFO: | |
3570 | case PD_EXT_COUNTRY_CODES: | |
8dea75e1 | 3571 | tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS); |
64f7c494 AT |
3572 | break; |
3573 | default: | |
8dea75e1 KT |
3574 | tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS); |
3575 | tcpm_log(port, "Unrecognized extended message type %#x", type); | |
64f7c494 AT |
3576 | break; |
3577 | } | |
3578 | } | |
3579 | ||
3ed8e1c2 | 3580 | static void tcpm_pd_rx_handler(struct kthread_work *work) |
f0690a25 GR |
3581 | { |
3582 | struct pd_rx_event *event = container_of(work, | |
3583 | struct pd_rx_event, work); | |
3584 | const struct pd_message *msg = &event->msg; | |
3585 | unsigned int cnt = pd_header_cnt_le(msg->header); | |
3586 | struct tcpm_port *port = event->port; | |
3bbb9ba4 | 3587 | enum tcpm_transmit_type rx_sop_type = event->rx_sop_type; |
f0690a25 GR |
3588 | |
3589 | mutex_lock(&port->lock); | |
3590 | ||
3591 | tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header), | |
3592 | port->attached); | |
3593 | ||
3594 | if (port->attached) { | |
5fec4b54 GR |
3595 | enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); |
3596 | unsigned int msgid = pd_header_msgid_le(msg->header); | |
3597 | ||
e03f6fef RB |
3598 | /* |
3599 | * Drop SOP' messages if cannot receive via | |
3600 | * tcpm_can_communicate_sop_prime | |
3601 | */ | |
3602 | if (rx_sop_type == TCPC_TX_SOP_PRIME && | |
3603 | !tcpm_can_communicate_sop_prime(port)) | |
3604 | goto done; | |
3605 | ||
5fec4b54 GR |
3606 | /* |
3607 | * USB PD standard, 6.6.1.2: | |
3608 | * "... if MessageID value in a received Message is the | |
3609 | * same as the stored value, the receiver shall return a | |
3610 | * GoodCRC Message with that MessageID value and drop | |
3611 | * the Message (this is a retry of an already received | |
3612 | * Message). Note: this shall not apply to the Soft_Reset | |
3613 | * Message which always has a MessageID value of zero." | |
3614 | */ | |
e03f6fef RB |
3615 | switch (rx_sop_type) { |
3616 | case TCPC_TX_SOP_PRIME: | |
3617 | if (msgid == port->rx_msgid_prime) | |
3618 | goto done; | |
3619 | port->rx_msgid_prime = msgid; | |
6bd181ba | 3620 | break; |
e03f6fef RB |
3621 | case TCPC_TX_SOP: |
3622 | default: | |
3623 | if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET) | |
3624 | goto done; | |
3625 | port->rx_msgid = msgid; | |
3626 | break; | |
3627 | } | |
5fec4b54 | 3628 | |
f0690a25 GR |
3629 | /* |
3630 | * If both ends believe to be DFP/host, we have a data role | |
3631 | * mismatch. | |
3632 | */ | |
3633 | if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) == | |
e03f6fef | 3634 | (port->data_role == TYPEC_HOST) && rx_sop_type == TCPC_TX_SOP) { |
f0690a25 GR |
3635 | tcpm_log(port, |
3636 | "Data role mismatch, initiating error recovery"); | |
3637 | tcpm_set_state(port, ERROR_RECOVERY, 0); | |
3638 | } else { | |
c58bbe34 | 3639 | if (le16_to_cpu(msg->header) & PD_HEADER_EXT_HDR) |
64f7c494 AT |
3640 | tcpm_pd_ext_msg_request(port, msg); |
3641 | else if (cnt) | |
fb7ff25a | 3642 | tcpm_pd_data_request(port, msg, rx_sop_type); |
f0690a25 | 3643 | else |
6bd181ba | 3644 | tcpm_pd_ctrl_request(port, msg, rx_sop_type); |
f0690a25 GR |
3645 | } |
3646 | } | |
3647 | ||
5fec4b54 | 3648 | done: |
f0690a25 GR |
3649 | mutex_unlock(&port->lock); |
3650 | kfree(event); | |
3651 | } | |
3652 | ||
3bbb9ba4 RB |
3653 | void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg, |
3654 | enum tcpm_transmit_type rx_sop_type) | |
f0690a25 GR |
3655 | { |
3656 | struct pd_rx_event *event; | |
3657 | ||
3658 | event = kzalloc(sizeof(*event), GFP_ATOMIC); | |
3659 | if (!event) | |
3660 | return; | |
3661 | ||
3ed8e1c2 | 3662 | kthread_init_work(&event->work, tcpm_pd_rx_handler); |
f0690a25 | 3663 | event->port = port; |
3bbb9ba4 | 3664 | event->rx_sop_type = rx_sop_type; |
f0690a25 | 3665 | memcpy(&event->msg, msg, sizeof(*msg)); |
3ed8e1c2 | 3666 | kthread_queue_work(port->wq, &event->work); |
f0690a25 GR |
3667 | } |
3668 | EXPORT_SYMBOL_GPL(tcpm_pd_receive); | |
3669 | ||
3670 | static int tcpm_pd_send_control(struct tcpm_port *port, | |
6bd181ba RB |
3671 | enum pd_ctrl_msg_type type, |
3672 | enum tcpm_transmit_type tx_sop_type) | |
f0690a25 GR |
3673 | { |
3674 | struct pd_message msg; | |
3675 | ||
3676 | memset(&msg, 0, sizeof(msg)); | |
6bd181ba RB |
3677 | switch (tx_sop_type) { |
3678 | case TCPC_TX_SOP_PRIME: | |
3679 | msg.header = PD_HEADER_LE(type, | |
3680 | 0, /* Cable Plug Indicator for DFP/UFP */ | |
3681 | 0, /* Reserved */ | |
3682 | port->negotiated_rev, | |
3683 | port->message_id_prime, | |
3684 | 0); | |
3685 | break; | |
3686 | case TCPC_TX_SOP: | |
3687 | msg.header = PD_HEADER_LE(type, | |
3688 | port->pwr_role, | |
3689 | port->data_role, | |
3690 | port->negotiated_rev, | |
3691 | port->message_id, | |
3692 | 0); | |
3693 | break; | |
3694 | default: | |
3695 | msg.header = PD_HEADER_LE(type, | |
3696 | port->pwr_role, | |
3697 | port->data_role, | |
3698 | port->negotiated_rev, | |
3699 | port->message_id, | |
3700 | 0); | |
3701 | break; | |
3702 | } | |
f0690a25 | 3703 | |
6bd181ba | 3704 | return tcpm_pd_transmit(port, tx_sop_type, &msg); |
f0690a25 GR |
3705 | } |
3706 | ||
3707 | /* | |
3708 | * Send queued message without affecting state. | |
3709 | * Return true if state machine should go back to sleep, | |
3710 | * false otherwise. | |
3711 | */ | |
3712 | static bool tcpm_send_queued_message(struct tcpm_port *port) | |
3713 | { | |
3714 | enum pd_msg_request queued_message; | |
60e998d1 | 3715 | int ret; |
f0690a25 GR |
3716 | |
3717 | do { | |
3718 | queued_message = port->queued_message; | |
3719 | port->queued_message = PD_MSG_NONE; | |
3720 | ||
3721 | switch (queued_message) { | |
3722 | case PD_MSG_CTRL_WAIT: | |
6bd181ba | 3723 | tcpm_pd_send_control(port, PD_CTRL_WAIT, TCPC_TX_SOP); |
f0690a25 GR |
3724 | break; |
3725 | case PD_MSG_CTRL_REJECT: | |
6bd181ba | 3726 | tcpm_pd_send_control(port, PD_CTRL_REJECT, TCPC_TX_SOP); |
f0690a25 | 3727 | break; |
64f7c494 | 3728 | case PD_MSG_CTRL_NOT_SUPP: |
6bd181ba | 3729 | tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP, TCPC_TX_SOP); |
64f7c494 | 3730 | break; |
f0690a25 | 3731 | case PD_MSG_DATA_SINK_CAP: |
8dea75e1 KT |
3732 | ret = tcpm_pd_send_sink_caps(port); |
3733 | if (ret < 0) { | |
3734 | tcpm_log(port, "Unable to send snk caps, ret=%d", ret); | |
3735 | tcpm_set_state(port, SNK_SOFT_RESET, 0); | |
3736 | } | |
3737 | tcpm_ams_finish(port); | |
f0690a25 GR |
3738 | break; |
3739 | case PD_MSG_DATA_SOURCE_CAP: | |
60e998d1 | 3740 | ret = tcpm_pd_send_source_caps(port); |
3741 | if (ret < 0) { | |
3742 | tcpm_log(port, | |
3743 | "Unable to send src caps, ret=%d", | |
3744 | ret); | |
3745 | tcpm_set_state(port, SOFT_RESET_SEND, 0); | |
3746 | } else if (port->pwr_role == TYPEC_SOURCE) { | |
8dea75e1 | 3747 | tcpm_ams_finish(port); |
60e998d1 | 3748 | tcpm_set_state(port, HARD_RESET_SEND, |
3749 | PD_T_SENDER_RESPONSE); | |
8dea75e1 KT |
3750 | } else { |
3751 | tcpm_ams_finish(port); | |
60e998d1 | 3752 | } |
f0690a25 GR |
3753 | break; |
3754 | default: | |
3755 | break; | |
3756 | } | |
3757 | } while (port->queued_message != PD_MSG_NONE); | |
3758 | ||
3759 | if (port->delayed_state != INVALID_STATE) { | |
3ed8e1c2 BJS |
3760 | if (ktime_after(port->delayed_runtime, ktime_get())) { |
3761 | mod_tcpm_delayed_work(port, ktime_to_ms(ktime_sub(port->delayed_runtime, | |
3762 | ktime_get()))); | |
f0690a25 GR |
3763 | return true; |
3764 | } | |
3765 | port->delayed_state = INVALID_STATE; | |
3766 | } | |
3767 | return false; | |
3768 | } | |
3769 | ||
3770 | static int tcpm_pd_check_request(struct tcpm_port *port) | |
3771 | { | |
3772 | u32 pdo, rdo = port->sink_request; | |
3773 | unsigned int max, op, pdo_max, index; | |
3774 | enum pd_pdo_type type; | |
3775 | ||
3776 | index = rdo_index(rdo); | |
3777 | if (!index || index > port->nr_src_pdo) | |
3778 | return -EINVAL; | |
3779 | ||
3780 | pdo = port->src_pdo[index - 1]; | |
3781 | type = pdo_type(pdo); | |
3782 | switch (type) { | |
3783 | case PDO_TYPE_FIXED: | |
3784 | case PDO_TYPE_VAR: | |
3785 | max = rdo_max_current(rdo); | |
3786 | op = rdo_op_current(rdo); | |
3787 | pdo_max = pdo_max_current(pdo); | |
3788 | ||
3789 | if (op > pdo_max) | |
3790 | return -EINVAL; | |
3791 | if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH)) | |
3792 | return -EINVAL; | |
3793 | ||
3794 | if (type == PDO_TYPE_FIXED) | |
3795 | tcpm_log(port, | |
3796 | "Requested %u mV, %u mA for %u / %u mA", | |
3797 | pdo_fixed_voltage(pdo), pdo_max, op, max); | |
3798 | else | |
3799 | tcpm_log(port, | |
3800 | "Requested %u -> %u mV, %u mA for %u / %u mA", | |
3801 | pdo_min_voltage(pdo), pdo_max_voltage(pdo), | |
3802 | pdo_max, op, max); | |
3803 | break; | |
3804 | case PDO_TYPE_BATT: | |
3805 | max = rdo_max_power(rdo); | |
3806 | op = rdo_op_power(rdo); | |
3807 | pdo_max = pdo_max_power(pdo); | |
3808 | ||
3809 | if (op > pdo_max) | |
3810 | return -EINVAL; | |
3811 | if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH)) | |
3812 | return -EINVAL; | |
3813 | tcpm_log(port, | |
3814 | "Requested %u -> %u mV, %u mW for %u / %u mW", | |
3815 | pdo_min_voltage(pdo), pdo_max_voltage(pdo), | |
3816 | pdo_max, op, max); | |
3817 | break; | |
3818 | default: | |
3819 | return -EINVAL; | |
3820 | } | |
3821 | ||
3822 | port->op_vsafe5v = index == 1; | |
3823 | ||
3824 | return 0; | |
3825 | } | |
3826 | ||
53fe0de9 LJ |
3827 | #define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y)) |
3828 | #define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y)) | |
3829 | ||
3830 | static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo, | |
3831 | int *src_pdo) | |
f0690a25 | 3832 | { |
53fe0de9 LJ |
3833 | unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0, |
3834 | max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0, | |
3835 | min_snk_mv = 0; | |
f0690a25 GR |
3836 | int ret = -EINVAL; |
3837 | ||
2eadc33f | 3838 | port->pps_data.supported = false; |
f2a8aa05 | 3839 | port->usb_type = POWER_SUPPLY_USB_TYPE_PD; |
86629e09 | 3840 | power_supply_changed(port->psy); |
2eadc33f | 3841 | |
f0690a25 | 3842 | /* |
53fe0de9 LJ |
3843 | * Select the source PDO providing the most power which has a |
3844 | * matchig sink cap. | |
f0690a25 GR |
3845 | */ |
3846 | for (i = 0; i < port->nr_source_caps; i++) { | |
3847 | u32 pdo = port->source_caps[i]; | |
3848 | enum pd_pdo_type type = pdo_type(pdo); | |
f0690a25 | 3849 | |
2eadc33f AT |
3850 | switch (type) { |
3851 | case PDO_TYPE_FIXED: | |
53fe0de9 LJ |
3852 | max_src_mv = pdo_fixed_voltage(pdo); |
3853 | min_src_mv = max_src_mv; | |
2eadc33f AT |
3854 | break; |
3855 | case PDO_TYPE_BATT: | |
3856 | case PDO_TYPE_VAR: | |
53fe0de9 LJ |
3857 | max_src_mv = pdo_max_voltage(pdo); |
3858 | min_src_mv = pdo_min_voltage(pdo); | |
2eadc33f AT |
3859 | break; |
3860 | case PDO_TYPE_APDO: | |
f2a8aa05 | 3861 | if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) { |
2eadc33f | 3862 | port->pps_data.supported = true; |
f2a8aa05 AT |
3863 | port->usb_type = |
3864 | POWER_SUPPLY_USB_TYPE_PD_PPS; | |
86629e09 | 3865 | power_supply_changed(port->psy); |
f2a8aa05 | 3866 | } |
2eadc33f AT |
3867 | continue; |
3868 | default: | |
3869 | tcpm_log(port, "Invalid source PDO type, ignoring"); | |
3870 | continue; | |
53fe0de9 | 3871 | } |
6f566af3 | 3872 | |
2eadc33f AT |
3873 | switch (type) { |
3874 | case PDO_TYPE_FIXED: | |
3875 | case PDO_TYPE_VAR: | |
53fe0de9 LJ |
3876 | src_ma = pdo_max_current(pdo); |
3877 | src_mw = src_ma * min_src_mv / 1000; | |
2eadc33f AT |
3878 | break; |
3879 | case PDO_TYPE_BATT: | |
3880 | src_mw = pdo_max_power(pdo); | |
3881 | break; | |
3882 | case PDO_TYPE_APDO: | |
3883 | continue; | |
3884 | default: | |
3885 | tcpm_log(port, "Invalid source PDO type, ignoring"); | |
3886 | continue; | |
6f566af3 HG |
3887 | } |
3888 | ||
53fe0de9 LJ |
3889 | for (j = 0; j < port->nr_snk_pdo; j++) { |
3890 | pdo = port->snk_pdo[j]; | |
3891 | ||
2eadc33f AT |
3892 | switch (pdo_type(pdo)) { |
3893 | case PDO_TYPE_FIXED: | |
53fe0de9 | 3894 | max_snk_mv = pdo_fixed_voltage(pdo); |
2eadc33f AT |
3895 | min_snk_mv = max_snk_mv; |
3896 | break; | |
3897 | case PDO_TYPE_BATT: | |
3898 | case PDO_TYPE_VAR: | |
53fe0de9 | 3899 | max_snk_mv = pdo_max_voltage(pdo); |
2eadc33f AT |
3900 | min_snk_mv = pdo_min_voltage(pdo); |
3901 | break; | |
3902 | case PDO_TYPE_APDO: | |
3903 | continue; | |
3904 | default: | |
3905 | tcpm_log(port, "Invalid sink PDO type, ignoring"); | |
3906 | continue; | |
53fe0de9 LJ |
3907 | } |
3908 | ||
3909 | if (max_src_mv <= max_snk_mv && | |
3910 | min_src_mv >= min_snk_mv) { | |
3911 | /* Prefer higher voltages if available */ | |
3912 | if ((src_mw == max_mw && min_src_mv > max_mv) || | |
3913 | src_mw > max_mw) { | |
3914 | *src_pdo = i; | |
3915 | *sink_pdo = j; | |
3916 | max_mw = src_mw; | |
3917 | max_mv = min_src_mv; | |
3918 | ret = 0; | |
3919 | } | |
3920 | } | |
f0690a25 GR |
3921 | } |
3922 | } | |
3923 | ||
3924 | return ret; | |
3925 | } | |
3926 | ||
2eadc33f AT |
3927 | static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port) |
3928 | { | |
40f362ff KT |
3929 | unsigned int i, src_ma, max_temp_mw = 0, max_op_ma, op_mw; |
3930 | unsigned int src_pdo = 0; | |
3931 | u32 pdo, src; | |
2eadc33f | 3932 | |
2eadc33f AT |
3933 | for (i = 1; i < port->nr_source_caps; ++i) { |
3934 | pdo = port->source_caps[i]; | |
3935 | ||
3936 | switch (pdo_type(pdo)) { | |
3937 | case PDO_TYPE_APDO: | |
3938 | if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { | |
3939 | tcpm_log(port, "Not PPS APDO (source), ignoring"); | |
3940 | continue; | |
3941 | } | |
3942 | ||
40f362ff KT |
3943 | if (port->pps_data.req_out_volt > pdo_pps_apdo_max_voltage(pdo) || |
3944 | port->pps_data.req_out_volt < pdo_pps_apdo_min_voltage(pdo)) | |
3945 | continue; | |
2eadc33f | 3946 | |
40f362ff KT |
3947 | src_ma = pdo_pps_apdo_max_current(pdo); |
3948 | max_op_ma = min(src_ma, port->pps_data.req_op_curr); | |
3949 | op_mw = max_op_ma * port->pps_data.req_out_volt / 1000; | |
3950 | if (op_mw > max_temp_mw) { | |
3951 | src_pdo = i; | |
3952 | max_temp_mw = op_mw; | |
2eadc33f | 3953 | } |
2eadc33f AT |
3954 | break; |
3955 | default: | |
3956 | tcpm_log(port, "Not APDO type (source), ignoring"); | |
3957 | continue; | |
3958 | } | |
3959 | } | |
3960 | ||
3961 | if (src_pdo) { | |
c710d0bb | 3962 | src = port->source_caps[src_pdo]; |
40f362ff KT |
3963 | |
3964 | port->pps_data.req_min_volt = pdo_pps_apdo_min_voltage(src); | |
3965 | port->pps_data.req_max_volt = pdo_pps_apdo_max_voltage(src); | |
3966 | port->pps_data.req_max_curr = pdo_pps_apdo_max_current(src); | |
374157ff | 3967 | port->pps_data.req_op_curr = min(port->pps_data.req_max_curr, |
e3a07202 | 3968 | port->pps_data.req_op_curr); |
2eadc33f AT |
3969 | } |
3970 | ||
3971 | return src_pdo; | |
3972 | } | |
3973 | ||
f0690a25 GR |
3974 | static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) |
3975 | { | |
3976 | unsigned int mv, ma, mw, flags; | |
3977 | unsigned int max_ma, max_mw; | |
3978 | enum pd_pdo_type type; | |
53fe0de9 | 3979 | u32 pdo, matching_snk_pdo; |
0c718676 GKH |
3980 | int src_pdo_index = 0; |
3981 | int snk_pdo_index = 0; | |
53fe0de9 | 3982 | int ret; |
f0690a25 | 3983 | |
53fe0de9 LJ |
3984 | ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index); |
3985 | if (ret < 0) | |
3986 | return ret; | |
3987 | ||
3988 | pdo = port->source_caps[src_pdo_index]; | |
3989 | matching_snk_pdo = port->snk_pdo[snk_pdo_index]; | |
f0690a25 GR |
3990 | type = pdo_type(pdo); |
3991 | ||
2eadc33f AT |
3992 | switch (type) { |
3993 | case PDO_TYPE_FIXED: | |
f0690a25 | 3994 | mv = pdo_fixed_voltage(pdo); |
2eadc33f AT |
3995 | break; |
3996 | case PDO_TYPE_BATT: | |
3997 | case PDO_TYPE_VAR: | |
f0690a25 | 3998 | mv = pdo_min_voltage(pdo); |
2eadc33f AT |
3999 | break; |
4000 | default: | |
4001 | tcpm_log(port, "Invalid PDO selected!"); | |
4002 | return -EINVAL; | |
4003 | } | |
f0690a25 | 4004 | |
53fe0de9 | 4005 | /* Select maximum available current within the sink pdo's limit */ |
f0690a25 | 4006 | if (type == PDO_TYPE_BATT) { |
53fe0de9 LJ |
4007 | mw = min_power(pdo, matching_snk_pdo); |
4008 | ma = 1000 * mw / mv; | |
f0690a25 | 4009 | } else { |
53fe0de9 LJ |
4010 | ma = min_current(pdo, matching_snk_pdo); |
4011 | mw = ma * mv / 1000; | |
f0690a25 | 4012 | } |
f0690a25 | 4013 | |
931693f9 | 4014 | flags = RDO_USB_COMM | RDO_NO_SUSPEND; |
f0690a25 GR |
4015 | |
4016 | /* Set mismatch bit if offered power is less than operating power */ | |
f0690a25 GR |
4017 | max_ma = ma; |
4018 | max_mw = mw; | |
4019 | if (mw < port->operating_snk_mw) { | |
4020 | flags |= RDO_CAP_MISMATCH; | |
53fe0de9 LJ |
4021 | if (type == PDO_TYPE_BATT && |
4022 | (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo))) | |
4023 | max_mw = pdo_max_power(matching_snk_pdo); | |
4024 | else if (pdo_max_current(matching_snk_pdo) > | |
4025 | pdo_max_current(pdo)) | |
4026 | max_ma = pdo_max_current(matching_snk_pdo); | |
f0690a25 GR |
4027 | } |
4028 | ||
4029 | tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d", | |
4030 | port->cc_req, port->cc1, port->cc2, port->vbus_source, | |
4031 | port->vconn_role == TYPEC_SOURCE ? "source" : "sink", | |
4032 | port->polarity); | |
4033 | ||
4034 | if (type == PDO_TYPE_BATT) { | |
53fe0de9 | 4035 | *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags); |
f0690a25 GR |
4036 | |
4037 | tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s", | |
53fe0de9 | 4038 | src_pdo_index, mv, mw, |
f0690a25 GR |
4039 | flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); |
4040 | } else { | |
53fe0de9 | 4041 | *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags); |
f0690a25 GR |
4042 | |
4043 | tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s", | |
53fe0de9 | 4044 | src_pdo_index, mv, ma, |
f0690a25 GR |
4045 | flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); |
4046 | } | |
4047 | ||
f3dedafb BJS |
4048 | port->req_current_limit = ma; |
4049 | port->req_supply_voltage = mv; | |
f0690a25 GR |
4050 | |
4051 | return 0; | |
4052 | } | |
4053 | ||
4054 | static int tcpm_pd_send_request(struct tcpm_port *port) | |
4055 | { | |
4056 | struct pd_message msg; | |
4057 | int ret; | |
4058 | u32 rdo; | |
4059 | ||
4060 | ret = tcpm_pd_build_request(port, &rdo); | |
4061 | if (ret < 0) | |
4062 | return ret; | |
4063 | ||
2b537cf8 KT |
4064 | /* |
4065 | * Relax the threshold as voltage will be adjusted after Accept Message plus tSrcTransition. | |
4066 | * It is safer to modify the threshold here. | |
4067 | */ | |
4068 | tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, 0); | |
4069 | ||
f0690a25 GR |
4070 | memset(&msg, 0, sizeof(msg)); |
4071 | msg.header = PD_HEADER_LE(PD_DATA_REQUEST, | |
4072 | port->pwr_role, | |
4073 | port->data_role, | |
2eadc33f AT |
4074 | port->negotiated_rev, |
4075 | port->message_id, 1); | |
4076 | msg.payload[0] = cpu_to_le32(rdo); | |
4077 | ||
4078 | return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); | |
4079 | } | |
4080 | ||
4081 | static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo) | |
4082 | { | |
8e4657c6 | 4083 | unsigned int out_mv, op_ma, op_mw, max_mv, max_ma, flags; |
2eadc33f | 4084 | unsigned int src_pdo_index; |
2eadc33f AT |
4085 | |
4086 | src_pdo_index = tcpm_pd_select_pps_apdo(port); | |
4087 | if (!src_pdo_index) | |
4088 | return -EOPNOTSUPP; | |
4089 | ||
40f362ff KT |
4090 | max_mv = port->pps_data.req_max_volt; |
4091 | max_ma = port->pps_data.req_max_curr; | |
4092 | out_mv = port->pps_data.req_out_volt; | |
4093 | op_ma = port->pps_data.req_op_curr; | |
2eadc33f AT |
4094 | |
4095 | flags = RDO_USB_COMM | RDO_NO_SUSPEND; | |
4096 | ||
4097 | op_mw = (op_ma * out_mv) / 1000; | |
4098 | if (op_mw < port->operating_snk_mw) { | |
4099 | /* | |
4100 | * Try raising current to meet power needs. If that's not enough | |
4101 | * then try upping the voltage. If that's still not enough | |
4102 | * then we've obviously chosen a PPS APDO which really isn't | |
4103 | * suitable so abandon ship. | |
4104 | */ | |
4105 | op_ma = (port->operating_snk_mw * 1000) / out_mv; | |
4106 | if ((port->operating_snk_mw * 1000) % out_mv) | |
4107 | ++op_ma; | |
4108 | op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP); | |
4109 | ||
4110 | if (op_ma > max_ma) { | |
4111 | op_ma = max_ma; | |
4112 | out_mv = (port->operating_snk_mw * 1000) / op_ma; | |
4113 | if ((port->operating_snk_mw * 1000) % op_ma) | |
4114 | ++out_mv; | |
4115 | out_mv += RDO_PROG_VOLT_MV_STEP - | |
4116 | (out_mv % RDO_PROG_VOLT_MV_STEP); | |
4117 | ||
4118 | if (out_mv > max_mv) { | |
4119 | tcpm_log(port, "Invalid PPS APDO selected!"); | |
4120 | return -EINVAL; | |
4121 | } | |
4122 | } | |
4123 | } | |
4124 | ||
4125 | tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d", | |
4126 | port->cc_req, port->cc1, port->cc2, port->vbus_source, | |
4127 | port->vconn_role == TYPEC_SOURCE ? "source" : "sink", | |
4128 | port->polarity); | |
4129 | ||
4130 | *rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags); | |
4131 | ||
4132 | tcpm_log(port, "Requesting APDO %d: %u mV, %u mA", | |
4133 | src_pdo_index, out_mv, op_ma); | |
4134 | ||
e3a07202 BJS |
4135 | port->pps_data.req_op_curr = op_ma; |
4136 | port->pps_data.req_out_volt = out_mv; | |
2eadc33f AT |
4137 | |
4138 | return 0; | |
4139 | } | |
4140 | ||
4141 | static int tcpm_pd_send_pps_request(struct tcpm_port *port) | |
4142 | { | |
4143 | struct pd_message msg; | |
4144 | int ret; | |
4145 | u32 rdo; | |
4146 | ||
4147 | ret = tcpm_pd_build_pps_request(port, &rdo); | |
4148 | if (ret < 0) | |
4149 | return ret; | |
4150 | ||
2b537cf8 KT |
4151 | /* Relax the threshold as voltage will be adjusted right after Accept Message. */ |
4152 | tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, 0); | |
4153 | ||
2eadc33f AT |
4154 | memset(&msg, 0, sizeof(msg)); |
4155 | msg.header = PD_HEADER_LE(PD_DATA_REQUEST, | |
4156 | port->pwr_role, | |
4157 | port->data_role, | |
4158 | port->negotiated_rev, | |
f0690a25 GR |
4159 | port->message_id, 1); |
4160 | msg.payload[0] = cpu_to_le32(rdo); | |
4161 | ||
4162 | return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); | |
4163 | } | |
4164 | ||
4165 | static int tcpm_set_vbus(struct tcpm_port *port, bool enable) | |
4166 | { | |
4167 | int ret; | |
4168 | ||
4169 | if (enable && port->vbus_charge) | |
4170 | return -EINVAL; | |
4171 | ||
4172 | tcpm_log(port, "vbus:=%d charge=%d", enable, port->vbus_charge); | |
4173 | ||
4174 | ret = port->tcpc->set_vbus(port->tcpc, enable, port->vbus_charge); | |
4175 | if (ret < 0) | |
4176 | return ret; | |
4177 | ||
4178 | port->vbus_source = enable; | |
4179 | return 0; | |
4180 | } | |
4181 | ||
4182 | static int tcpm_set_charge(struct tcpm_port *port, bool charge) | |
4183 | { | |
4184 | int ret; | |
4185 | ||
4186 | if (charge && port->vbus_source) | |
4187 | return -EINVAL; | |
4188 | ||
4189 | if (charge != port->vbus_charge) { | |
4190 | tcpm_log(port, "vbus=%d charge:=%d", port->vbus_source, charge); | |
4191 | ret = port->tcpc->set_vbus(port->tcpc, port->vbus_source, | |
4192 | charge); | |
4193 | if (ret < 0) | |
4194 | return ret; | |
4195 | } | |
4196 | port->vbus_charge = charge; | |
86629e09 | 4197 | power_supply_changed(port->psy); |
f0690a25 GR |
4198 | return 0; |
4199 | } | |
4200 | ||
7893f9e1 | 4201 | static bool tcpm_start_toggling(struct tcpm_port *port, enum typec_cc_status cc) |
f0690a25 GR |
4202 | { |
4203 | int ret; | |
4204 | ||
7893f9e1 HG |
4205 | if (!port->tcpc->start_toggling) |
4206 | return false; | |
f0690a25 | 4207 | |
7893f9e1 HG |
4208 | tcpm_log_force(port, "Start toggling"); |
4209 | ret = port->tcpc->start_toggling(port->tcpc, port->port_type, cc); | |
4210 | return ret == 0; | |
f0690a25 GR |
4211 | } |
4212 | ||
f0690a25 GR |
4213 | static int tcpm_init_vbus(struct tcpm_port *port) |
4214 | { | |
4215 | int ret; | |
4216 | ||
4217 | ret = port->tcpc->set_vbus(port->tcpc, false, false); | |
4218 | port->vbus_source = false; | |
4219 | port->vbus_charge = false; | |
4220 | return ret; | |
4221 | } | |
4222 | ||
4223 | static int tcpm_init_vconn(struct tcpm_port *port) | |
4224 | { | |
4225 | int ret; | |
4226 | ||
4227 | ret = port->tcpc->set_vconn(port->tcpc, false); | |
4228 | port->vconn_role = TYPEC_SINK; | |
4229 | return ret; | |
4230 | } | |
4231 | ||
4232 | static void tcpm_typec_connect(struct tcpm_port *port) | |
4233 | { | |
4234 | if (!port->connected) { | |
4235 | /* Make sure we don't report stale identity information */ | |
4236 | memset(&port->partner_ident, 0, sizeof(port->partner_ident)); | |
4237 | port->partner_desc.usb_pd = port->pd_capable; | |
4238 | if (tcpm_port_is_debug(port)) | |
4239 | port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG; | |
4240 | else if (tcpm_port_is_audio(port)) | |
4241 | port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO; | |
4242 | else | |
4243 | port->partner_desc.accessory = TYPEC_ACCESSORY_NONE; | |
4244 | port->partner = typec_register_partner(port->typec_port, | |
4245 | &port->partner_desc); | |
4246 | port->connected = true; | |
8203d269 | 4247 | typec_partner_set_usb_power_delivery(port->partner, port->partner_pd); |
f0690a25 GR |
4248 | } |
4249 | } | |
4250 | ||
4251 | static int tcpm_src_attach(struct tcpm_port *port) | |
4252 | { | |
4253 | enum typec_cc_polarity polarity = | |
4254 | port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2 | |
4255 | : TYPEC_POLARITY_CC1; | |
4256 | int ret; | |
4257 | ||
4258 | if (port->attached) | |
4259 | return 0; | |
4260 | ||
4261 | ret = tcpm_set_polarity(port, polarity); | |
4262 | if (ret < 0) | |
4263 | return ret; | |
4264 | ||
dea6f87e | 4265 | tcpm_enable_auto_vbus_discharge(port, true); |
f321a02c BJS |
4266 | |
4267 | ret = tcpm_set_roles(port, true, TYPEC_SOURCE, tcpm_data_role_for_source(port)); | |
f0690a25 GR |
4268 | if (ret < 0) |
4269 | return ret; | |
4270 | ||
e9e6e164 KT |
4271 | if (port->pd_supported) { |
4272 | ret = port->tcpc->set_pd_rx(port->tcpc, true); | |
4273 | if (ret < 0) | |
4274 | goto out_disable_mux; | |
4275 | } | |
f0690a25 GR |
4276 | |
4277 | /* | |
4278 | * USB Type-C specification, version 1.2, | |
4279 | * chapter 4.5.2.2.8.1 (Attached.SRC Requirements) | |
4280 | * Enable VCONN only if the non-RD port is set to RA. | |
4281 | */ | |
4282 | if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) || | |
4283 | (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) { | |
4284 | ret = tcpm_set_vconn(port, true); | |
4285 | if (ret < 0) | |
4286 | goto out_disable_pd; | |
4287 | } | |
4288 | ||
4289 | ret = tcpm_set_vbus(port, true); | |
4290 | if (ret < 0) | |
4291 | goto out_disable_vconn; | |
4292 | ||
4293 | port->pd_capable = false; | |
4294 | ||
4295 | port->partner = NULL; | |
4296 | ||
4297 | port->attached = true; | |
4298 | port->send_discover = true; | |
fb7ff25a | 4299 | port->send_discover_prime = false; |
f0690a25 GR |
4300 | |
4301 | return 0; | |
4302 | ||
4303 | out_disable_vconn: | |
4304 | tcpm_set_vconn(port, false); | |
4305 | out_disable_pd: | |
e9e6e164 KT |
4306 | if (port->pd_supported) |
4307 | port->tcpc->set_pd_rx(port->tcpc, false); | |
f0690a25 | 4308 | out_disable_mux: |
e9576fe8 | 4309 | tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE, |
2000016c | 4310 | TYPEC_ORIENTATION_NONE); |
f0690a25 GR |
4311 | return ret; |
4312 | } | |
4313 | ||
4314 | static void tcpm_typec_disconnect(struct tcpm_port *port) | |
4315 | { | |
fb7ff25a RB |
4316 | /* |
4317 | * Unregister plug/cable outside of port->connected because cable can | |
4318 | * be discovered before SRC_READY/SNK_READY states where port->connected | |
4319 | * is set. | |
4320 | */ | |
4321 | typec_unregister_plug(port->plug_prime); | |
4322 | typec_unregister_cable(port->cable); | |
4323 | port->plug_prime = NULL; | |
4324 | port->cable = NULL; | |
f0690a25 | 4325 | if (port->connected) { |
8203d269 | 4326 | typec_partner_set_usb_power_delivery(port->partner, NULL); |
f0690a25 GR |
4327 | typec_unregister_partner(port->partner); |
4328 | port->partner = NULL; | |
4329 | port->connected = false; | |
4330 | } | |
4331 | } | |
4332 | ||
4333 | static void tcpm_unregister_altmodes(struct tcpm_port *port) | |
4334 | { | |
4335 | struct pd_mode_data *modep = &port->mode_data; | |
41d9d753 | 4336 | struct pd_mode_data *modep_prime = &port->mode_data_prime; |
f0690a25 GR |
4337 | int i; |
4338 | ||
4339 | for (i = 0; i < modep->altmodes; i++) { | |
4340 | typec_unregister_altmode(port->partner_altmode[i]); | |
4341 | port->partner_altmode[i] = NULL; | |
4342 | } | |
41d9d753 RB |
4343 | for (i = 0; i < modep_prime->altmodes; i++) { |
4344 | typec_unregister_altmode(port->plug_prime_altmode[i]); | |
4345 | port->plug_prime_altmode[i] = NULL; | |
4346 | } | |
f0690a25 GR |
4347 | |
4348 | memset(modep, 0, sizeof(*modep)); | |
41d9d753 | 4349 | memset(modep_prime, 0, sizeof(*modep_prime)); |
f0690a25 GR |
4350 | } |
4351 | ||
a69bdb28 BJS |
4352 | static void tcpm_set_partner_usb_comm_capable(struct tcpm_port *port, bool capable) |
4353 | { | |
4354 | tcpm_log(port, "Setting usb_comm capable %s", capable ? "true" : "false"); | |
4355 | ||
4356 | if (port->tcpc->set_partner_usb_comm_capable) | |
4357 | port->tcpc->set_partner_usb_comm_capable(port->tcpc, capable); | |
4358 | } | |
4359 | ||
f0690a25 GR |
4360 | static void tcpm_reset_port(struct tcpm_port *port) |
4361 | { | |
dea6f87e | 4362 | tcpm_enable_auto_vbus_discharge(port, false); |
0908c5ac KT |
4363 | port->in_ams = false; |
4364 | port->ams = NONE_AMS; | |
8d3a0578 | 4365 | port->vdm_sm_running = false; |
f0690a25 GR |
4366 | tcpm_unregister_altmodes(port); |
4367 | tcpm_typec_disconnect(port); | |
4368 | port->attached = false; | |
4369 | port->pd_capable = false; | |
2eadc33f | 4370 | port->pps_data.supported = false; |
a69bdb28 | 4371 | tcpm_set_partner_usb_comm_capable(port, false); |
f0690a25 | 4372 | |
5fec4b54 GR |
4373 | /* |
4374 | * First Rx ID should be 0; set this to a sentinel of -1 so that | |
4375 | * we can check tcpm_pd_rx_handler() if we had seen it before. | |
4376 | */ | |
4377 | port->rx_msgid = -1; | |
e03f6fef | 4378 | port->rx_msgid_prime = -1; |
5fec4b54 | 4379 | |
f0690a25 GR |
4380 | port->tcpc->set_pd_rx(port->tcpc, false); |
4381 | tcpm_init_vbus(port); /* also disables charging */ | |
4382 | tcpm_init_vconn(port); | |
4383 | tcpm_set_current_limit(port, 0, 0); | |
4384 | tcpm_set_polarity(port, TYPEC_POLARITY_CC1); | |
e9576fe8 | 4385 | tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE, |
2000016c | 4386 | TYPEC_ORIENTATION_NONE); |
f0690a25 GR |
4387 | tcpm_set_attached_state(port, false); |
4388 | port->try_src_count = 0; | |
4389 | port->try_snk_count = 0; | |
f2a8aa05 | 4390 | port->usb_type = POWER_SUPPLY_USB_TYPE_C; |
86629e09 | 4391 | power_supply_changed(port->psy); |
8dc4bd07 BJS |
4392 | port->nr_sink_caps = 0; |
4393 | port->sink_cap_done = false; | |
4394 | if (port->tcpc->enable_frs) | |
4395 | port->tcpc->enable_frs(port->tcpc, false); | |
8203d269 HK |
4396 | |
4397 | usb_power_delivery_unregister_capabilities(port->partner_sink_caps); | |
4398 | port->partner_sink_caps = NULL; | |
4399 | usb_power_delivery_unregister_capabilities(port->partner_source_caps); | |
4400 | port->partner_source_caps = NULL; | |
4401 | usb_power_delivery_unregister(port->partner_pd); | |
4402 | port->partner_pd = NULL; | |
f0690a25 GR |
4403 | } |
4404 | ||
4405 | static void tcpm_detach(struct tcpm_port *port) | |
4406 | { | |
2d9c6442 LJ |
4407 | if (tcpm_port_is_disconnected(port)) |
4408 | port->hard_reset_count = 0; | |
4409 | ||
f0690a25 GR |
4410 | if (!port->attached) |
4411 | return; | |
4412 | ||
b2dcfefc BJS |
4413 | if (port->tcpc->set_bist_data) { |
4414 | tcpm_log(port, "disable BIST MODE TESTDATA"); | |
4415 | port->tcpc->set_bist_data(port->tcpc, false); | |
4416 | } | |
4417 | ||
f0690a25 GR |
4418 | tcpm_reset_port(port); |
4419 | } | |
4420 | ||
4421 | static void tcpm_src_detach(struct tcpm_port *port) | |
4422 | { | |
4423 | tcpm_detach(port); | |
4424 | } | |
4425 | ||
4426 | static int tcpm_snk_attach(struct tcpm_port *port) | |
4427 | { | |
4428 | int ret; | |
4429 | ||
4430 | if (port->attached) | |
4431 | return 0; | |
4432 | ||
4433 | ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ? | |
4434 | TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1); | |
4435 | if (ret < 0) | |
4436 | return ret; | |
4437 | ||
dea6f87e | 4438 | tcpm_enable_auto_vbus_discharge(port, true); |
f321a02c BJS |
4439 | |
4440 | ret = tcpm_set_roles(port, true, TYPEC_SINK, tcpm_data_role_for_sink(port)); | |
f0690a25 GR |
4441 | if (ret < 0) |
4442 | return ret; | |
4443 | ||
4444 | port->pd_capable = false; | |
4445 | ||
4446 | port->partner = NULL; | |
4447 | ||
4448 | port->attached = true; | |
4449 | port->send_discover = true; | |
fb7ff25a | 4450 | port->send_discover_prime = false; |
f0690a25 GR |
4451 | |
4452 | return 0; | |
4453 | } | |
4454 | ||
4455 | static void tcpm_snk_detach(struct tcpm_port *port) | |
4456 | { | |
4457 | tcpm_detach(port); | |
f0690a25 GR |
4458 | } |
4459 | ||
4460 | static int tcpm_acc_attach(struct tcpm_port *port) | |
4461 | { | |
4462 | int ret; | |
4463 | ||
4464 | if (port->attached) | |
4465 | return 0; | |
4466 | ||
6ecc632d LJ |
4467 | ret = tcpm_set_roles(port, true, TYPEC_SOURCE, |
4468 | tcpm_data_role_for_source(port)); | |
f0690a25 GR |
4469 | if (ret < 0) |
4470 | return ret; | |
4471 | ||
4472 | port->partner = NULL; | |
4473 | ||
4474 | tcpm_typec_connect(port); | |
4475 | ||
4476 | port->attached = true; | |
4477 | ||
4478 | return 0; | |
4479 | } | |
4480 | ||
4481 | static void tcpm_acc_detach(struct tcpm_port *port) | |
4482 | { | |
4483 | tcpm_detach(port); | |
4484 | } | |
4485 | ||
4486 | static inline enum tcpm_state hard_reset_state(struct tcpm_port *port) | |
4487 | { | |
4488 | if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) | |
4489 | return HARD_RESET_SEND; | |
4490 | if (port->pd_capable) | |
4491 | return ERROR_RECOVERY; | |
4492 | if (port->pwr_role == TYPEC_SOURCE) | |
4493 | return SRC_UNATTACHED; | |
4494 | if (port->state == SNK_WAIT_CAPABILITIES) | |
4495 | return SNK_READY; | |
4496 | return SNK_UNATTACHED; | |
4497 | } | |
4498 | ||
f0690a25 GR |
4499 | static inline enum tcpm_state unattached_state(struct tcpm_port *port) |
4500 | { | |
13cb492c BJS |
4501 | if (port->port_type == TYPEC_PORT_DRP) { |
4502 | if (port->pwr_role == TYPEC_SOURCE) | |
4503 | return SRC_UNATTACHED; | |
4504 | else | |
4505 | return SNK_UNATTACHED; | |
ceeb1625 | 4506 | } else if (port->port_type == TYPEC_PORT_SRC) { |
f0690a25 | 4507 | return SRC_UNATTACHED; |
13cb492c BJS |
4508 | } |
4509 | ||
4510 | return SNK_UNATTACHED; | |
f0690a25 GR |
4511 | } |
4512 | ||
f0690a25 GR |
4513 | static void tcpm_swap_complete(struct tcpm_port *port, int result) |
4514 | { | |
4515 | if (port->swap_pending) { | |
4516 | port->swap_status = result; | |
4517 | port->swap_pending = false; | |
b17dd571 | 4518 | port->non_pd_role_swap = false; |
f0690a25 GR |
4519 | complete(&port->swap_complete); |
4520 | } | |
4521 | } | |
4522 | ||
53b70e5c | 4523 | static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc) |
fce042f0 BJS |
4524 | { |
4525 | switch (cc) { | |
4526 | case TYPEC_CC_RP_1_5: | |
4527 | return TYPEC_PWR_MODE_1_5A; | |
4528 | case TYPEC_CC_RP_3_0: | |
4529 | return TYPEC_PWR_MODE_3_0A; | |
4530 | case TYPEC_CC_RP_DEF: | |
4531 | default: | |
4532 | return TYPEC_PWR_MODE_USB; | |
4533 | } | |
4534 | } | |
4535 | ||
e9e6e164 KT |
4536 | static enum typec_cc_status tcpm_pwr_opmode_to_rp(enum typec_pwr_opmode opmode) |
4537 | { | |
4538 | switch (opmode) { | |
4539 | case TYPEC_PWR_MODE_USB: | |
4540 | return TYPEC_CC_RP_DEF; | |
4541 | case TYPEC_PWR_MODE_1_5A: | |
4542 | return TYPEC_CC_RP_1_5; | |
4543 | case TYPEC_PWR_MODE_3_0A: | |
4544 | case TYPEC_PWR_MODE_PD: | |
4545 | default: | |
4546 | return TYPEC_CC_RP_3_0; | |
4547 | } | |
4548 | } | |
4549 | ||
c97cd0b4 RB |
4550 | static void tcpm_set_initial_svdm_version(struct tcpm_port *port) |
4551 | { | |
4552 | switch (port->negotiated_rev) { | |
4553 | case PD_REV30: | |
4554 | break; | |
4555 | /* | |
4556 | * 6.4.4.2.3 Structured VDM Version | |
4557 | * 2.0 states "At this time, there is only one version (1.0) defined. | |
4558 | * This field Shall be set to zero to indicate Version 1.0." | |
4559 | * 3.0 states "This field Shall be set to 01b to indicate Version 2.0." | |
4560 | * To ensure that we follow the Power Delivery revision we are currently | |
4561 | * operating on, downgrade the SVDM version to the highest one supported | |
4562 | * by the Power Delivery revision. | |
4563 | */ | |
4564 | case PD_REV20: | |
4565 | typec_partner_set_svdm_version(port->partner, SVDM_VER_1_0); | |
4566 | break; | |
4567 | default: | |
4568 | typec_partner_set_svdm_version(port->partner, SVDM_VER_1_0); | |
4569 | break; | |
4570 | } | |
4571 | } | |
4572 | ||
f0690a25 GR |
4573 | static void run_state_machine(struct tcpm_port *port) |
4574 | { | |
4575 | int ret; | |
fce042f0 | 4576 | enum typec_pwr_opmode opmode; |
131c7d12 | 4577 | unsigned int msecs; |
0908c5ac | 4578 | enum tcpm_state upcoming_state; |
f0690a25 | 4579 | |
599f008c BJS |
4580 | if (port->tcpc->check_contaminant && port->state != CHECK_CONTAMINANT) |
4581 | port->potential_contaminant = ((port->enter_state == SRC_ATTACH_WAIT && | |
4582 | port->state == SRC_UNATTACHED) || | |
4583 | (port->enter_state == SNK_ATTACH_WAIT && | |
1a4a2df0 BJS |
4584 | port->state == SNK_UNATTACHED) || |
4585 | (port->enter_state == SNK_DEBOUNCED && | |
599f008c BJS |
4586 | port->state == SNK_UNATTACHED)); |
4587 | ||
f0690a25 GR |
4588 | port->enter_state = port->state; |
4589 | switch (port->state) { | |
7893f9e1 | 4590 | case TOGGLING: |
f0690a25 | 4591 | break; |
599f008c BJS |
4592 | case CHECK_CONTAMINANT: |
4593 | port->tcpc->check_contaminant(port->tcpc); | |
4594 | break; | |
f0690a25 GR |
4595 | /* SRC states */ |
4596 | case SRC_UNATTACHED: | |
b17dd571 GR |
4597 | if (!port->non_pd_role_swap) |
4598 | tcpm_swap_complete(port, -ENOTCONN); | |
f0690a25 | 4599 | tcpm_src_detach(port); |
599f008c BJS |
4600 | if (port->potential_contaminant) { |
4601 | tcpm_set_state(port, CHECK_CONTAMINANT, 0); | |
4602 | break; | |
4603 | } | |
7893f9e1 HG |
4604 | if (tcpm_start_toggling(port, tcpm_rp_cc(port))) { |
4605 | tcpm_set_state(port, TOGGLING, 0); | |
f0690a25 GR |
4606 | break; |
4607 | } | |
4608 | tcpm_set_cc(port, tcpm_rp_cc(port)); | |
9b0ae699 | 4609 | if (port->port_type == TYPEC_PORT_DRP) |
f0690a25 GR |
4610 | tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK); |
4611 | break; | |
4612 | case SRC_ATTACH_WAIT: | |
4613 | if (tcpm_port_is_debug(port)) | |
4614 | tcpm_set_state(port, DEBUG_ACC_ATTACHED, | |
4615 | PD_T_CC_DEBOUNCE); | |
4616 | else if (tcpm_port_is_audio(port)) | |
4617 | tcpm_set_state(port, AUDIO_ACC_ATTACHED, | |
4618 | PD_T_CC_DEBOUNCE); | |
28b43d3d | 4619 | else if (tcpm_port_is_source(port) && port->vbus_vsafe0v) |
f0690a25 GR |
4620 | tcpm_set_state(port, |
4621 | tcpm_try_snk(port) ? SNK_TRY | |
4622 | : SRC_ATTACHED, | |
4623 | PD_T_CC_DEBOUNCE); | |
4624 | break; | |
4625 | ||
4626 | case SNK_TRY: | |
4627 | port->try_snk_count++; | |
4628 | /* | |
4629 | * Requirements: | |
4630 | * - Do not drive vconn or vbus | |
4631 | * - Terminate CC pins (both) to Rd | |
4632 | * Action: | |
4633 | * - Wait for tDRPTry (PD_T_DRP_TRY). | |
4634 | * Until then, ignore any state changes. | |
4635 | */ | |
4636 | tcpm_set_cc(port, TYPEC_CC_RD); | |
4637 | tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY); | |
4638 | break; | |
4639 | case SNK_TRY_WAIT: | |
a0a3e04e BJS |
4640 | if (tcpm_port_is_sink(port)) { |
4641 | tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0); | |
4642 | } else { | |
4643 | tcpm_set_state(port, SRC_TRYWAIT, 0); | |
4644 | port->max_wait = 0; | |
4645 | } | |
4646 | break; | |
4647 | case SNK_TRY_WAIT_DEBOUNCE: | |
4648 | tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS, | |
11e5e568 | 4649 | PD_T_TRY_CC_DEBOUNCE); |
a0a3e04e BJS |
4650 | break; |
4651 | case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS: | |
11e5e568 | 4652 | if (port->vbus_present && tcpm_port_is_sink(port)) |
f0690a25 | 4653 | tcpm_set_state(port, SNK_ATTACHED, 0); |
11e5e568 | 4654 | else |
02d5be46 | 4655 | port->max_wait = 0; |
f0690a25 GR |
4656 | break; |
4657 | case SRC_TRYWAIT: | |
4658 | tcpm_set_cc(port, tcpm_rp_cc(port)); | |
02d5be46 BJS |
4659 | if (port->max_wait == 0) { |
4660 | port->max_wait = jiffies + | |
4661 | msecs_to_jiffies(PD_T_DRP_TRY); | |
f0690a25 GR |
4662 | tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED, |
4663 | PD_T_DRP_TRY); | |
02d5be46 BJS |
4664 | } else { |
4665 | if (time_is_after_jiffies(port->max_wait)) | |
4666 | tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED, | |
4667 | jiffies_to_msecs(port->max_wait - | |
4668 | jiffies)); | |
4669 | else | |
4670 | tcpm_set_state(port, SNK_UNATTACHED, 0); | |
4671 | } | |
4672 | break; | |
4673 | case SRC_TRYWAIT_DEBOUNCE: | |
4674 | tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE); | |
f0690a25 GR |
4675 | break; |
4676 | case SRC_TRYWAIT_UNATTACHED: | |
4677 | tcpm_set_state(port, SNK_UNATTACHED, 0); | |
4678 | break; | |
4679 | ||
4680 | case SRC_ATTACHED: | |
4681 | ret = tcpm_src_attach(port); | |
4682 | tcpm_set_state(port, SRC_UNATTACHED, | |
4683 | ret < 0 ? 0 : PD_T_PS_SOURCE_ON); | |
4684 | break; | |
4685 | case SRC_STARTUP: | |
fce042f0 BJS |
4686 | opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port)); |
4687 | typec_set_pwr_opmode(port->typec_port, opmode); | |
f0690a25 GR |
4688 | port->pwr_opmode = TYPEC_PWR_MODE_USB; |
4689 | port->caps_count = 0; | |
2eadc33f | 4690 | port->negotiated_rev = PD_MAX_REV; |
e03f6fef | 4691 | port->negotiated_rev_prime = PD_MAX_REV; |
f0690a25 | 4692 | port->message_id = 0; |
e03f6fef | 4693 | port->message_id_prime = 0; |
5fec4b54 | 4694 | port->rx_msgid = -1; |
e03f6fef | 4695 | port->rx_msgid_prime = -1; |
f0690a25 | 4696 | port->explicit_contract = false; |
0908c5ac KT |
4697 | /* SNK -> SRC POWER/FAST_ROLE_SWAP finished */ |
4698 | if (port->ams == POWER_ROLE_SWAP || | |
4699 | port->ams == FAST_ROLE_SWAP) | |
4700 | tcpm_ams_finish(port); | |
e9e6e164 KT |
4701 | if (!port->pd_supported) { |
4702 | tcpm_set_state(port, SRC_READY, 0); | |
4703 | break; | |
4704 | } | |
0908c5ac KT |
4705 | port->upcoming_state = SRC_SEND_CAPABILITIES; |
4706 | tcpm_ams_start(port, POWER_NEGOTIATION); | |
f0690a25 GR |
4707 | break; |
4708 | case SRC_SEND_CAPABILITIES: | |
4709 | port->caps_count++; | |
4710 | if (port->caps_count > PD_N_CAPS_COUNT) { | |
4711 | tcpm_set_state(port, SRC_READY, 0); | |
4712 | break; | |
4713 | } | |
4714 | ret = tcpm_pd_send_source_caps(port); | |
4715 | if (ret < 0) { | |
af8b6270 RB |
4716 | if (tcpm_can_communicate_sop_prime(port) && |
4717 | IS_ERR_OR_NULL(port->cable)) | |
4718 | tcpm_set_state(port, SRC_VDM_IDENTITY_REQUEST, 0); | |
4719 | else | |
4720 | tcpm_set_state(port, SRC_SEND_CAPABILITIES, | |
4721 | PD_T_SEND_SOURCE_CAP); | |
f0690a25 GR |
4722 | } else { |
4723 | /* | |
4724 | * Per standard, we should clear the reset counter here. | |
4725 | * However, that can result in state machine hang-ups. | |
4726 | * Reset it only in READY state to improve stability. | |
4727 | */ | |
4728 | /* port->hard_reset_count = 0; */ | |
4729 | port->caps_count = 0; | |
4730 | port->pd_capable = true; | |
976daf9d | 4731 | tcpm_set_state_cond(port, SRC_SEND_CAPABILITIES_TIMEOUT, |
f0690a25 GR |
4732 | PD_T_SEND_SOURCE_CAP); |
4733 | } | |
4734 | break; | |
976daf9d HG |
4735 | case SRC_SEND_CAPABILITIES_TIMEOUT: |
4736 | /* | |
4737 | * Error recovery for a PD_DATA_SOURCE_CAP reply timeout. | |
4738 | * | |
4739 | * PD 2.0 sinks are supposed to accept src-capabilities with a | |
4740 | * 3.0 header and simply ignore any src PDOs which the sink does | |
4741 | * not understand such as PPS but some 2.0 sinks instead ignore | |
4742 | * the entire PD_DATA_SOURCE_CAP message, causing contract | |
4743 | * negotiation to fail. | |
4744 | * | |
4745 | * After PD_N_HARD_RESET_COUNT hard-reset attempts, we try | |
4746 | * sending src-capabilities with a lower PD revision to | |
4747 | * make these broken sinks work. | |
4748 | */ | |
4749 | if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) { | |
4750 | tcpm_set_state(port, HARD_RESET_SEND, 0); | |
4751 | } else if (port->negotiated_rev > PD_REV20) { | |
4752 | port->negotiated_rev--; | |
4753 | port->hard_reset_count = 0; | |
4754 | tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0); | |
4755 | } else { | |
4756 | tcpm_set_state(port, hard_reset_state(port), 0); | |
4757 | } | |
4758 | break; | |
f0690a25 GR |
4759 | case SRC_NEGOTIATE_CAPABILITIES: |
4760 | ret = tcpm_pd_check_request(port); | |
4761 | if (ret < 0) { | |
6bd181ba | 4762 | tcpm_pd_send_control(port, PD_CTRL_REJECT, TCPC_TX_SOP); |
f0690a25 GR |
4763 | if (!port->explicit_contract) { |
4764 | tcpm_set_state(port, | |
4765 | SRC_WAIT_NEW_CAPABILITIES, 0); | |
4766 | } else { | |
4767 | tcpm_set_state(port, SRC_READY, 0); | |
4768 | } | |
4769 | } else { | |
6bd181ba | 4770 | tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); |
a69bdb28 BJS |
4771 | tcpm_set_partner_usb_comm_capable(port, |
4772 | !!(port->sink_request & RDO_USB_COMM)); | |
f0690a25 GR |
4773 | tcpm_set_state(port, SRC_TRANSITION_SUPPLY, |
4774 | PD_T_SRC_TRANSITION); | |
4775 | } | |
4776 | break; | |
4777 | case SRC_TRANSITION_SUPPLY: | |
4778 | /* XXX: regulator_set_voltage(vbus, ...) */ | |
6bd181ba | 4779 | tcpm_pd_send_control(port, PD_CTRL_PS_RDY, TCPC_TX_SOP); |
f0690a25 GR |
4780 | port->explicit_contract = true; |
4781 | typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD); | |
4782 | port->pwr_opmode = TYPEC_PWR_MODE_PD; | |
4783 | tcpm_set_state_cond(port, SRC_READY, 0); | |
4784 | break; | |
4785 | case SRC_READY: | |
4786 | #if 1 | |
4787 | port->hard_reset_count = 0; | |
4788 | #endif | |
4789 | port->try_src_count = 0; | |
4790 | ||
3113bf1a | 4791 | tcpm_swap_complete(port, 0); |
f0690a25 | 4792 | tcpm_typec_connect(port); |
2eadc33f | 4793 | |
0908c5ac KT |
4794 | if (port->ams != NONE_AMS) |
4795 | tcpm_ams_finish(port); | |
8dea75e1 KT |
4796 | if (port->next_ams != NONE_AMS) { |
4797 | port->ams = port->next_ams; | |
4798 | port->next_ams = NONE_AMS; | |
4799 | } | |
4800 | ||
0908c5ac KT |
4801 | /* |
4802 | * If previous AMS is interrupted, switch to the upcoming | |
4803 | * state. | |
4804 | */ | |
4805 | if (port->upcoming_state != INVALID_STATE) { | |
4806 | upcoming_state = port->upcoming_state; | |
4807 | port->upcoming_state = INVALID_STATE; | |
4808 | tcpm_set_state(port, upcoming_state, 0); | |
4809 | break; | |
4810 | } | |
4811 | ||
c34e85fa KT |
4812 | /* |
4813 | * 6.4.4.3.1 Discover Identity | |
4814 | * "The Discover Identity Command Shall only be sent to SOP when there is an | |
4815 | * Explicit Contract." | |
fb7ff25a RB |
4816 | * |
4817 | * Discover Identity on SOP' should be discovered prior to the | |
4818 | * ready state, but if done after a Vconn Swap following Discover | |
4819 | * Identity on SOP then the discovery process can be run here | |
4820 | * as well. | |
c34e85fa | 4821 | */ |
c97cd0b4 | 4822 | if (port->explicit_contract) { |
fb7ff25a RB |
4823 | if (port->send_discover_prime) { |
4824 | port->tx_sop_type = TCPC_TX_SOP_PRIME; | |
4825 | } else { | |
4826 | port->tx_sop_type = TCPC_TX_SOP; | |
4827 | tcpm_set_initial_svdm_version(port); | |
4828 | } | |
c34e85fa | 4829 | mod_send_discover_delayed_work(port, 0); |
c97cd0b4 | 4830 | } else { |
c34e85fa | 4831 | port->send_discover = false; |
fb7ff25a | 4832 | port->send_discover_prime = false; |
c97cd0b4 | 4833 | } |
c34e85fa | 4834 | |
f0690a25 GR |
4835 | /* |
4836 | * 6.3.5 | |
4837 | * Sending ping messages is not necessary if | |
4838 | * - the source operates at vSafe5V | |
4839 | * or | |
4840 | * - The system is not operating in PD mode | |
4841 | * or | |
4842 | * - Both partners are connected using a Type-C connector | |
f451ac9e BJS |
4843 | * |
4844 | * There is no actual need to send PD messages since the local | |
4845 | * port type-c and the spec does not clearly say whether PD is | |
4846 | * possible when type-c is connected to Type-A/B | |
f0690a25 | 4847 | */ |
f0690a25 GR |
4848 | break; |
4849 | case SRC_WAIT_NEW_CAPABILITIES: | |
4850 | /* Nothing to do... */ | |
4851 | break; | |
4852 | ||
4853 | /* SNK states */ | |
4854 | case SNK_UNATTACHED: | |
b17dd571 GR |
4855 | if (!port->non_pd_role_swap) |
4856 | tcpm_swap_complete(port, -ENOTCONN); | |
2eadc33f | 4857 | tcpm_pps_complete(port, -ENOTCONN); |
f0690a25 | 4858 | tcpm_snk_detach(port); |
599f008c BJS |
4859 | if (port->potential_contaminant) { |
4860 | tcpm_set_state(port, CHECK_CONTAMINANT, 0); | |
4861 | break; | |
4862 | } | |
7893f9e1 HG |
4863 | if (tcpm_start_toggling(port, TYPEC_CC_RD)) { |
4864 | tcpm_set_state(port, TOGGLING, 0); | |
f0690a25 GR |
4865 | break; |
4866 | } | |
4867 | tcpm_set_cc(port, TYPEC_CC_RD); | |
9b0ae699 | 4868 | if (port->port_type == TYPEC_PORT_DRP) |
f0690a25 GR |
4869 | tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC); |
4870 | break; | |
4871 | case SNK_ATTACH_WAIT: | |
4872 | if ((port->cc1 == TYPEC_CC_OPEN && | |
4873 | port->cc2 != TYPEC_CC_OPEN) || | |
4874 | (port->cc1 != TYPEC_CC_OPEN && | |
4875 | port->cc2 == TYPEC_CC_OPEN)) | |
4876 | tcpm_set_state(port, SNK_DEBOUNCED, | |
4877 | PD_T_CC_DEBOUNCE); | |
4878 | else if (tcpm_port_is_disconnected(port)) | |
4879 | tcpm_set_state(port, SNK_UNATTACHED, | |
4880 | PD_T_PD_DEBOUNCE); | |
4881 | break; | |
4882 | case SNK_DEBOUNCED: | |
4883 | if (tcpm_port_is_disconnected(port)) | |
4884 | tcpm_set_state(port, SNK_UNATTACHED, | |
4885 | PD_T_PD_DEBOUNCE); | |
4886 | else if (port->vbus_present) | |
4887 | tcpm_set_state(port, | |
4888 | tcpm_try_src(port) ? SRC_TRY | |
4889 | : SNK_ATTACHED, | |
4890 | 0); | |
f0690a25 | 4891 | break; |
f0690a25 GR |
4892 | case SRC_TRY: |
4893 | port->try_src_count++; | |
4894 | tcpm_set_cc(port, tcpm_rp_cc(port)); | |
131c7d12 BJS |
4895 | port->max_wait = 0; |
4896 | tcpm_set_state(port, SRC_TRY_WAIT, 0); | |
4897 | break; | |
4898 | case SRC_TRY_WAIT: | |
4899 | if (port->max_wait == 0) { | |
4900 | port->max_wait = jiffies + | |
4901 | msecs_to_jiffies(PD_T_DRP_TRY); | |
4902 | msecs = PD_T_DRP_TRY; | |
4903 | } else { | |
4904 | if (time_is_after_jiffies(port->max_wait)) | |
4905 | msecs = jiffies_to_msecs(port->max_wait - | |
4906 | jiffies); | |
4907 | else | |
4908 | msecs = 0; | |
4909 | } | |
4910 | tcpm_set_state(port, SNK_TRYWAIT, msecs); | |
f0690a25 GR |
4911 | break; |
4912 | case SRC_TRY_DEBOUNCE: | |
4913 | tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE); | |
4914 | break; | |
4915 | case SNK_TRYWAIT: | |
4916 | tcpm_set_cc(port, TYPEC_CC_RD); | |
af450ebb | 4917 | tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE); |
f0690a25 | 4918 | break; |
af450ebb BJS |
4919 | case SNK_TRYWAIT_VBUS: |
4920 | /* | |
4921 | * TCPM stays in this state indefinitely until VBUS | |
4922 | * is detected as long as Rp is not detected for | |
4923 | * more than a time period of tPDDebounce. | |
4924 | */ | |
4925 | if (port->vbus_present && tcpm_port_is_sink(port)) { | |
f0690a25 GR |
4926 | tcpm_set_state(port, SNK_ATTACHED, 0); |
4927 | break; | |
4928 | } | |
af450ebb BJS |
4929 | if (!tcpm_port_is_sink(port)) |
4930 | tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0); | |
f0690a25 | 4931 | break; |
af450ebb BJS |
4932 | case SNK_TRYWAIT_DEBOUNCE: |
4933 | tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE); | |
f0690a25 | 4934 | break; |
f0690a25 GR |
4935 | case SNK_ATTACHED: |
4936 | ret = tcpm_snk_attach(port); | |
4937 | if (ret < 0) | |
4938 | tcpm_set_state(port, SNK_UNATTACHED, 0); | |
4939 | else | |
4940 | tcpm_set_state(port, SNK_STARTUP, 0); | |
4941 | break; | |
4942 | case SNK_STARTUP: | |
fce042f0 BJS |
4943 | opmode = tcpm_get_pwr_opmode(port->polarity ? |
4944 | port->cc2 : port->cc1); | |
4945 | typec_set_pwr_opmode(port->typec_port, opmode); | |
f0690a25 | 4946 | port->pwr_opmode = TYPEC_PWR_MODE_USB; |
2eadc33f | 4947 | port->negotiated_rev = PD_MAX_REV; |
e03f6fef | 4948 | port->negotiated_rev_prime = PD_MAX_REV; |
f0690a25 | 4949 | port->message_id = 0; |
e03f6fef | 4950 | port->message_id_prime = 0; |
5fec4b54 | 4951 | port->rx_msgid = -1; |
e03f6fef | 4952 | port->rx_msgid_prime = -1; |
f0690a25 | 4953 | port->explicit_contract = false; |
0908c5ac KT |
4954 | |
4955 | if (port->ams == POWER_ROLE_SWAP || | |
4956 | port->ams == FAST_ROLE_SWAP) | |
4957 | /* SRC -> SNK POWER/FAST_ROLE_SWAP finished */ | |
4958 | tcpm_ams_finish(port); | |
4959 | ||
f0690a25 GR |
4960 | tcpm_set_state(port, SNK_DISCOVERY, 0); |
4961 | break; | |
4962 | case SNK_DISCOVERY: | |
4963 | if (port->vbus_present) { | |
1373fefc BJS |
4964 | u32 current_lim = tcpm_get_current_limit(port); |
4965 | ||
12701ce5 | 4966 | if (port->slow_charger_loop && (current_lim > PD_P_SNK_STDBY_MW / 5)) |
1373fefc BJS |
4967 | current_lim = PD_P_SNK_STDBY_MW / 5; |
4968 | tcpm_set_current_limit(port, current_lim, 5000); | |
803b1c8a | 4969 | /* Not sink vbus if operational current is 0mA */ |
187fb003 BJS |
4970 | tcpm_set_charge(port, !port->pd_supported || |
4971 | pdo_max_current(port->snk_pdo[0])); | |
803b1c8a | 4972 | |
e9e6e164 KT |
4973 | if (!port->pd_supported) |
4974 | tcpm_set_state(port, SNK_READY, 0); | |
4975 | else | |
4976 | tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); | |
f0690a25 GR |
4977 | break; |
4978 | } | |
4979 | /* | |
4980 | * For DRP, timeouts differ. Also, handling is supposed to be | |
4981 | * different and much more complex (dead battery detection; | |
4982 | * see USB power delivery specification, section 8.3.3.6.1.5.1). | |
4983 | */ | |
4984 | tcpm_set_state(port, hard_reset_state(port), | |
9b0ae699 | 4985 | port->port_type == TYPEC_PORT_DRP ? |
f0690a25 GR |
4986 | PD_T_DB_DETECT : PD_T_NO_RESPONSE); |
4987 | break; | |
4988 | case SNK_DISCOVERY_DEBOUNCE: | |
4989 | tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE, | |
4990 | PD_T_CC_DEBOUNCE); | |
4991 | break; | |
4992 | case SNK_DISCOVERY_DEBOUNCE_DONE: | |
4993 | if (!tcpm_port_is_disconnected(port) && | |
4994 | tcpm_port_is_sink(port) && | |
3ed8e1c2 | 4995 | ktime_after(port->delayed_runtime, ktime_get())) { |
f0690a25 | 4996 | tcpm_set_state(port, SNK_DISCOVERY, |
3ed8e1c2 | 4997 | ktime_to_ms(ktime_sub(port->delayed_runtime, ktime_get()))); |
f0690a25 GR |
4998 | break; |
4999 | } | |
5000 | tcpm_set_state(port, unattached_state(port), 0); | |
5001 | break; | |
5002 | case SNK_WAIT_CAPABILITIES: | |
5003 | ret = port->tcpc->set_pd_rx(port->tcpc, true); | |
5004 | if (ret < 0) { | |
5005 | tcpm_set_state(port, SNK_READY, 0); | |
5006 | break; | |
5007 | } | |
5008 | /* | |
5009 | * If VBUS has never been low, and we time out waiting | |
5010 | * for source cap, try a soft reset first, in case we | |
5011 | * were already in a stable contract before this boot. | |
5012 | * Do this only once. | |
5013 | */ | |
5014 | if (port->vbus_never_low) { | |
5015 | port->vbus_never_low = false; | |
0908c5ac | 5016 | tcpm_set_state(port, SNK_SOFT_RESET, |
f0690a25 GR |
5017 | PD_T_SINK_WAIT_CAP); |
5018 | } else { | |
5019 | tcpm_set_state(port, hard_reset_state(port), | |
5020 | PD_T_SINK_WAIT_CAP); | |
5021 | } | |
5022 | break; | |
5023 | case SNK_NEGOTIATE_CAPABILITIES: | |
5024 | port->pd_capable = true; | |
a69bdb28 BJS |
5025 | tcpm_set_partner_usb_comm_capable(port, |
5026 | !!(port->source_caps[0] & PDO_FIXED_USB_COMM)); | |
f0690a25 GR |
5027 | port->hard_reset_count = 0; |
5028 | ret = tcpm_pd_send_request(port); | |
5029 | if (ret < 0) { | |
2b537cf8 KT |
5030 | /* Restore back to the original state */ |
5031 | tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD, | |
5032 | port->pps_data.active, | |
5033 | port->supply_voltage); | |
f0690a25 GR |
5034 | /* Let the Source send capabilities again. */ |
5035 | tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); | |
5036 | } else { | |
5037 | tcpm_set_state_cond(port, hard_reset_state(port), | |
5038 | PD_T_SENDER_RESPONSE); | |
5039 | } | |
5040 | break; | |
2eadc33f AT |
5041 | case SNK_NEGOTIATE_PPS_CAPABILITIES: |
5042 | ret = tcpm_pd_send_pps_request(port); | |
5043 | if (ret < 0) { | |
2b537cf8 KT |
5044 | /* Restore back to the original state */ |
5045 | tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD, | |
5046 | port->pps_data.active, | |
5047 | port->supply_voltage); | |
2eadc33f AT |
5048 | port->pps_status = ret; |
5049 | /* | |
5050 | * If this was called due to updates to sink | |
5051 | * capabilities, and pps is no longer valid, we should | |
5052 | * safely fall back to a standard PDO. | |
5053 | */ | |
5054 | if (port->update_sink_caps) | |
5055 | tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); | |
5056 | else | |
5057 | tcpm_set_state(port, SNK_READY, 0); | |
5058 | } else { | |
5059 | tcpm_set_state_cond(port, hard_reset_state(port), | |
5060 | PD_T_SENDER_RESPONSE); | |
5061 | } | |
5062 | break; | |
f0690a25 | 5063 | case SNK_TRANSITION_SINK: |
12308684 BJS |
5064 | /* From the USB PD spec: |
5065 | * "The Sink Shall transition to Sink Standby before a positive or | |
5066 | * negative voltage transition of VBUS. During Sink Standby | |
5067 | * the Sink Shall reduce its power draw to pSnkStdby." | |
5068 | * | |
5069 | * This is not applicable to PPS though as the port can continue | |
5070 | * to draw negotiated power without switching to standby. | |
5071 | */ | |
5072 | if (port->supply_voltage != port->req_supply_voltage && !port->pps_data.active && | |
5073 | port->current_limit * port->supply_voltage / 1000 > PD_P_SNK_STDBY_MW) { | |
5074 | u32 stdby_ma = PD_P_SNK_STDBY_MW * 1000 / port->supply_voltage; | |
5075 | ||
5076 | tcpm_log(port, "Setting standby current %u mV @ %u mA", | |
5077 | port->supply_voltage, stdby_ma); | |
5078 | tcpm_set_current_limit(port, stdby_ma, port->supply_voltage); | |
5079 | } | |
5080 | fallthrough; | |
f0690a25 GR |
5081 | case SNK_TRANSITION_SINK_VBUS: |
5082 | tcpm_set_state(port, hard_reset_state(port), | |
5083 | PD_T_PS_TRANSITION); | |
5084 | break; | |
5085 | case SNK_READY: | |
5086 | port->try_snk_count = 0; | |
2eadc33f | 5087 | port->update_sink_caps = false; |
8bf05746 BJS |
5088 | if (port->explicit_contract) { |
5089 | typec_set_pwr_opmode(port->typec_port, | |
5090 | TYPEC_PWR_MODE_PD); | |
5091 | port->pwr_opmode = TYPEC_PWR_MODE_PD; | |
5092 | } | |
f0690a25 | 5093 | |
1373fefc BJS |
5094 | if (!port->pd_capable && port->slow_charger_loop) |
5095 | tcpm_set_current_limit(port, tcpm_get_current_limit(port), 5000); | |
3113bf1a | 5096 | tcpm_swap_complete(port, 0); |
f0690a25 | 5097 | tcpm_typec_connect(port); |
7d530f4c KT |
5098 | if (port->pd_capable && port->source_caps[0] & PDO_FIXED_DUAL_ROLE) |
5099 | mod_enable_frs_delayed_work(port, 0); | |
2eadc33f | 5100 | tcpm_pps_complete(port, port->pps_status); |
0908c5ac KT |
5101 | |
5102 | if (port->ams != NONE_AMS) | |
5103 | tcpm_ams_finish(port); | |
8dea75e1 KT |
5104 | if (port->next_ams != NONE_AMS) { |
5105 | port->ams = port->next_ams; | |
5106 | port->next_ams = NONE_AMS; | |
5107 | } | |
5108 | ||
0908c5ac KT |
5109 | /* |
5110 | * If previous AMS is interrupted, switch to the upcoming | |
5111 | * state. | |
5112 | */ | |
5113 | if (port->upcoming_state != INVALID_STATE) { | |
5114 | upcoming_state = port->upcoming_state; | |
5115 | port->upcoming_state = INVALID_STATE; | |
5116 | tcpm_set_state(port, upcoming_state, 0); | |
5117 | break; | |
5118 | } | |
5119 | ||
c34e85fa KT |
5120 | /* |
5121 | * 6.4.4.3.1 Discover Identity | |
5122 | * "The Discover Identity Command Shall only be sent to SOP when there is an | |
5123 | * Explicit Contract." | |
fb7ff25a RB |
5124 | * |
5125 | * Discover Identity on SOP' should be discovered prior to the | |
5126 | * ready state, but if done after a Vconn Swap following Discover | |
5127 | * Identity on SOP then the discovery process can be run here | |
5128 | * as well. | |
c34e85fa | 5129 | */ |
c97cd0b4 | 5130 | if (port->explicit_contract) { |
fb7ff25a RB |
5131 | if (port->send_discover_prime) { |
5132 | port->tx_sop_type = TCPC_TX_SOP_PRIME; | |
5133 | } else { | |
5134 | port->tx_sop_type = TCPC_TX_SOP; | |
5135 | tcpm_set_initial_svdm_version(port); | |
5136 | } | |
c34e85fa | 5137 | mod_send_discover_delayed_work(port, 0); |
c97cd0b4 | 5138 | } else { |
c34e85fa | 5139 | port->send_discover = false; |
fb7ff25a | 5140 | port->send_discover_prime = false; |
c97cd0b4 | 5141 | } |
c34e85fa | 5142 | |
f2a8aa05 | 5143 | power_supply_changed(port->psy); |
f0690a25 GR |
5144 | break; |
5145 | ||
5146 | /* Accessory states */ | |
5147 | case ACC_UNATTACHED: | |
5148 | tcpm_acc_detach(port); | |
5149 | tcpm_set_state(port, SRC_UNATTACHED, 0); | |
5150 | break; | |
5151 | case DEBUG_ACC_ATTACHED: | |
5152 | case AUDIO_ACC_ATTACHED: | |
5153 | ret = tcpm_acc_attach(port); | |
5154 | if (ret < 0) | |
5155 | tcpm_set_state(port, ACC_UNATTACHED, 0); | |
5156 | break; | |
5157 | case AUDIO_ACC_DEBOUNCE: | |
5158 | tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE); | |
5159 | break; | |
5160 | ||
5161 | /* Hard_Reset states */ | |
5162 | case HARD_RESET_SEND: | |
0908c5ac KT |
5163 | if (port->ams != NONE_AMS) |
5164 | tcpm_ams_finish(port); | |
5165 | /* | |
5166 | * State machine will be directed to HARD_RESET_START, | |
5167 | * thus set upcoming_state to INVALID_STATE. | |
5168 | */ | |
5169 | port->upcoming_state = INVALID_STATE; | |
5170 | tcpm_ams_start(port, HARD_RESET); | |
f0690a25 GR |
5171 | break; |
5172 | case HARD_RESET_START: | |
8dc4bd07 BJS |
5173 | port->sink_cap_done = false; |
5174 | if (port->tcpc->enable_frs) | |
5175 | port->tcpc->enable_frs(port->tcpc, false); | |
f0690a25 GR |
5176 | port->hard_reset_count++; |
5177 | port->tcpc->set_pd_rx(port->tcpc, false); | |
5178 | tcpm_unregister_altmodes(port); | |
8dc4bd07 | 5179 | port->nr_sink_caps = 0; |
f0690a25 | 5180 | port->send_discover = true; |
fb7ff25a | 5181 | port->send_discover_prime = false; |
f0690a25 GR |
5182 | if (port->pwr_role == TYPEC_SOURCE) |
5183 | tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF, | |
5184 | PD_T_PS_HARD_RESET); | |
5185 | else | |
5186 | tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0); | |
5187 | break; | |
5188 | case SRC_HARD_RESET_VBUS_OFF: | |
23e26d05 BJS |
5189 | /* |
5190 | * 7.1.5 Response to Hard Resets | |
5191 | * Hard Reset Signaling indicates a communication failure has occurred and the | |
5192 | * Source Shall stop driving VCONN, Shall remove Rp from the VCONN pin and Shall | |
5193 | * drive VBUS to vSafe0V as shown in Figure 7-9. | |
5194 | */ | |
5195 | tcpm_set_vconn(port, false); | |
f0690a25 | 5196 | tcpm_set_vbus(port, false); |
23b5f732 | 5197 | tcpm_set_roles(port, port->self_powered, TYPEC_SOURCE, |
6ecc632d | 5198 | tcpm_data_role_for_source(port)); |
23e26d05 BJS |
5199 | /* |
5200 | * If tcpc fails to notify vbus off, TCPM will wait for PD_T_SAFE_0V + | |
5201 | * PD_T_SRC_RECOVER before turning vbus back on. | |
5202 | * From Table 7-12 Sequence Description for a Source Initiated Hard Reset: | |
5203 | * 4. Policy Engine waits tPSHardReset after sending Hard Reset Signaling and then | |
5204 | * tells the Device Policy Manager to instruct the power supply to perform a | |
5205 | * Hard Reset. The transition to vSafe0V Shall occur within tSafe0V (t2). | |
5206 | * 5. After tSrcRecover the Source applies power to VBUS in an attempt to | |
5207 | * re-establish communication with the Sink and resume USB Default Operation. | |
5208 | * The transition to vSafe5V Shall occur within tSrcTurnOn(t4). | |
5209 | */ | |
5210 | tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SAFE_0V + PD_T_SRC_RECOVER); | |
f0690a25 GR |
5211 | break; |
5212 | case SRC_HARD_RESET_VBUS_ON: | |
23e26d05 | 5213 | tcpm_set_vconn(port, true); |
f0690a25 | 5214 | tcpm_set_vbus(port, true); |
0908c5ac KT |
5215 | if (port->ams == HARD_RESET) |
5216 | tcpm_ams_finish(port); | |
e9e6e164 KT |
5217 | if (port->pd_supported) |
5218 | port->tcpc->set_pd_rx(port->tcpc, true); | |
f0690a25 GR |
5219 | tcpm_set_attached_state(port, true); |
5220 | tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON); | |
5221 | break; | |
5222 | case SNK_HARD_RESET_SINK_OFF: | |
f321a02c BJS |
5223 | /* Do not discharge/disconnect during hard reseet */ |
5224 | tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, 0); | |
2eadc33f | 5225 | memset(&port->pps_data, 0, sizeof(port->pps_data)); |
f0690a25 | 5226 | tcpm_set_vconn(port, false); |
157c0f2f BJS |
5227 | if (port->pd_capable) |
5228 | tcpm_set_charge(port, false); | |
23b5f732 | 5229 | tcpm_set_roles(port, port->self_powered, TYPEC_SINK, |
6ecc632d | 5230 | tcpm_data_role_for_sink(port)); |
f0690a25 GR |
5231 | /* |
5232 | * VBUS may or may not toggle, depending on the adapter. | |
5233 | * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON | |
5234 | * directly after timeout. | |
5235 | */ | |
5236 | tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V); | |
5237 | break; | |
5238 | case SNK_HARD_RESET_WAIT_VBUS: | |
0908c5ac KT |
5239 | if (port->ams == HARD_RESET) |
5240 | tcpm_ams_finish(port); | |
f0690a25 GR |
5241 | /* Assume we're disconnected if VBUS doesn't come back. */ |
5242 | tcpm_set_state(port, SNK_UNATTACHED, | |
5243 | PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON); | |
5244 | break; | |
5245 | case SNK_HARD_RESET_SINK_ON: | |
5246 | /* Note: There is no guarantee that VBUS is on in this state */ | |
5247 | /* | |
5248 | * XXX: | |
5249 | * The specification suggests that dual mode ports in sink | |
5250 | * mode should transition to state PE_SRC_Transition_to_default. | |
5251 | * See USB power delivery specification chapter 8.3.3.6.1.3. | |
908d34aa | 5252 | * This would mean to |
f0690a25 GR |
5253 | * - turn off VCONN, reset power supply |
5254 | * - request hardware reset | |
5255 | * - turn on VCONN | |
5256 | * - Transition to state PE_Src_Startup | |
5257 | * SNK only ports shall transition to state Snk_Startup | |
5258 | * (see chapter 8.3.3.3.8). | |
5259 | * Similar, dual-mode ports in source mode should transition | |
5260 | * to PE_SNK_Transition_to_default. | |
5261 | */ | |
157c0f2f BJS |
5262 | if (port->pd_capable) { |
5263 | tcpm_set_current_limit(port, | |
5264 | tcpm_get_current_limit(port), | |
5265 | 5000); | |
803b1c8a XY |
5266 | /* Not sink vbus if operational current is 0mA */ |
5267 | tcpm_set_charge(port, !!pdo_max_current(port->snk_pdo[0])); | |
157c0f2f | 5268 | } |
0908c5ac KT |
5269 | if (port->ams == HARD_RESET) |
5270 | tcpm_ams_finish(port); | |
f0690a25 | 5271 | tcpm_set_attached_state(port, true); |
f321a02c | 5272 | tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, VSAFE5V); |
f0690a25 GR |
5273 | tcpm_set_state(port, SNK_STARTUP, 0); |
5274 | break; | |
5275 | ||
5276 | /* Soft_Reset states */ | |
5277 | case SOFT_RESET: | |
5278 | port->message_id = 0; | |
5fec4b54 | 5279 | port->rx_msgid = -1; |
a826492f XY |
5280 | /* remove existing capabilities */ |
5281 | usb_power_delivery_unregister_capabilities(port->partner_source_caps); | |
5282 | port->partner_source_caps = NULL; | |
6bd181ba | 5283 | tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); |
8dea75e1 | 5284 | tcpm_ams_finish(port); |
0908c5ac KT |
5285 | if (port->pwr_role == TYPEC_SOURCE) { |
5286 | port->upcoming_state = SRC_SEND_CAPABILITIES; | |
5287 | tcpm_ams_start(port, POWER_NEGOTIATION); | |
5288 | } else { | |
f0690a25 | 5289 | tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); |
0908c5ac KT |
5290 | } |
5291 | break; | |
5292 | case SRC_SOFT_RESET_WAIT_SNK_TX: | |
5293 | case SNK_SOFT_RESET: | |
5294 | if (port->ams != NONE_AMS) | |
5295 | tcpm_ams_finish(port); | |
5296 | port->upcoming_state = SOFT_RESET_SEND; | |
5297 | tcpm_ams_start(port, SOFT_RESET_AMS); | |
f0690a25 GR |
5298 | break; |
5299 | case SOFT_RESET_SEND: | |
6bd181ba RB |
5300 | /* |
5301 | * Power Delivery 3.0 Section 6.3.13 | |
5302 | * | |
5303 | * A Soft_Reset Message Shall be targeted at a specific entity | |
5304 | * depending on the type of SOP* packet used. | |
5305 | */ | |
5306 | if (port->tx_sop_type == TCPC_TX_SOP_PRIME) { | |
5307 | port->message_id_prime = 0; | |
5308 | port->rx_msgid_prime = -1; | |
5309 | tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET, TCPC_TX_SOP_PRIME); | |
5310 | tcpm_set_state_cond(port, ready_state(port), PD_T_SENDER_RESPONSE); | |
5311 | } else { | |
5312 | port->message_id = 0; | |
5313 | port->rx_msgid = -1; | |
5314 | /* remove existing capabilities */ | |
5315 | usb_power_delivery_unregister_capabilities(port->partner_source_caps); | |
5316 | port->partner_source_caps = NULL; | |
5317 | if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET, TCPC_TX_SOP)) | |
5318 | tcpm_set_state_cond(port, hard_reset_state(port), 0); | |
5319 | else | |
5320 | tcpm_set_state_cond(port, hard_reset_state(port), | |
5321 | PD_T_SENDER_RESPONSE); | |
5322 | } | |
f0690a25 GR |
5323 | break; |
5324 | ||
5325 | /* DR_Swap states */ | |
5326 | case DR_SWAP_SEND: | |
6bd181ba | 5327 | tcpm_pd_send_control(port, PD_CTRL_DR_SWAP, TCPC_TX_SOP); |
fb7ff25a | 5328 | if (port->data_role == TYPEC_DEVICE || port->negotiated_rev > PD_REV20) { |
ef52b4a9 | 5329 | port->send_discover = true; |
fb7ff25a RB |
5330 | port->send_discover_prime = false; |
5331 | } | |
f0690a25 GR |
5332 | tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT, |
5333 | PD_T_SENDER_RESPONSE); | |
5334 | break; | |
5335 | case DR_SWAP_ACCEPT: | |
6bd181ba | 5336 | tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); |
fb7ff25a | 5337 | if (port->data_role == TYPEC_DEVICE || port->negotiated_rev > PD_REV20) { |
ef52b4a9 | 5338 | port->send_discover = true; |
fb7ff25a RB |
5339 | port->send_discover_prime = false; |
5340 | } | |
f0690a25 GR |
5341 | tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0); |
5342 | break; | |
5343 | case DR_SWAP_SEND_TIMEOUT: | |
5344 | tcpm_swap_complete(port, -ETIMEDOUT); | |
ef52b4a9 | 5345 | port->send_discover = false; |
fb7ff25a | 5346 | port->send_discover_prime = false; |
8dea75e1 | 5347 | tcpm_ams_finish(port); |
f0690a25 GR |
5348 | tcpm_set_state(port, ready_state(port), 0); |
5349 | break; | |
5350 | case DR_SWAP_CHANGE_DR: | |
36f78477 CH |
5351 | tcpm_unregister_altmodes(port); |
5352 | if (port->data_role == TYPEC_HOST) | |
f0690a25 GR |
5353 | tcpm_set_roles(port, true, port->pwr_role, |
5354 | TYPEC_DEVICE); | |
36f78477 | 5355 | else |
f0690a25 GR |
5356 | tcpm_set_roles(port, true, port->pwr_role, |
5357 | TYPEC_HOST); | |
8dea75e1 | 5358 | tcpm_ams_finish(port); |
f0690a25 GR |
5359 | tcpm_set_state(port, ready_state(port), 0); |
5360 | break; | |
5361 | ||
8dc4bd07 | 5362 | case FR_SWAP_SEND: |
6bd181ba | 5363 | if (tcpm_pd_send_control(port, PD_CTRL_FR_SWAP, TCPC_TX_SOP)) { |
8dc4bd07 BJS |
5364 | tcpm_set_state(port, ERROR_RECOVERY, 0); |
5365 | break; | |
5366 | } | |
5367 | tcpm_set_state_cond(port, FR_SWAP_SEND_TIMEOUT, PD_T_SENDER_RESPONSE); | |
5368 | break; | |
5369 | case FR_SWAP_SEND_TIMEOUT: | |
5370 | tcpm_set_state(port, ERROR_RECOVERY, 0); | |
5371 | break; | |
5372 | case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF: | |
5373 | tcpm_set_state(port, ERROR_RECOVERY, PD_T_PS_SOURCE_OFF); | |
5374 | break; | |
5375 | case FR_SWAP_SNK_SRC_NEW_SINK_READY: | |
5376 | if (port->vbus_source) | |
5377 | tcpm_set_state(port, FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED, 0); | |
5378 | else | |
5379 | tcpm_set_state(port, ERROR_RECOVERY, PD_T_RECEIVER_RESPONSE); | |
5380 | break; | |
5381 | case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED: | |
5382 | tcpm_set_pwr_role(port, TYPEC_SOURCE); | |
6bd181ba | 5383 | if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY, TCPC_TX_SOP)) { |
8dc4bd07 BJS |
5384 | tcpm_set_state(port, ERROR_RECOVERY, 0); |
5385 | break; | |
5386 | } | |
5387 | tcpm_set_cc(port, tcpm_rp_cc(port)); | |
5388 | tcpm_set_state(port, SRC_STARTUP, PD_T_SWAP_SRC_START); | |
5389 | break; | |
5390 | ||
f0690a25 GR |
5391 | /* PR_Swap states */ |
5392 | case PR_SWAP_ACCEPT: | |
6bd181ba | 5393 | tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); |
f0690a25 GR |
5394 | tcpm_set_state(port, PR_SWAP_START, 0); |
5395 | break; | |
5396 | case PR_SWAP_SEND: | |
6bd181ba | 5397 | tcpm_pd_send_control(port, PD_CTRL_PR_SWAP, TCPC_TX_SOP); |
f0690a25 GR |
5398 | tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT, |
5399 | PD_T_SENDER_RESPONSE); | |
5400 | break; | |
5401 | case PR_SWAP_SEND_TIMEOUT: | |
5402 | tcpm_swap_complete(port, -ETIMEDOUT); | |
5403 | tcpm_set_state(port, ready_state(port), 0); | |
5404 | break; | |
5405 | case PR_SWAP_START: | |
59d4d06c | 5406 | tcpm_apply_rc(port); |
f0690a25 GR |
5407 | if (port->pwr_role == TYPEC_SOURCE) |
5408 | tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF, | |
5409 | PD_T_SRC_TRANSITION); | |
5410 | else | |
5411 | tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0); | |
5412 | break; | |
5413 | case PR_SWAP_SRC_SNK_TRANSITION_OFF: | |
f321a02c BJS |
5414 | /* |
5415 | * Prevent vbus discharge circuit from turning on during PR_SWAP | |
5416 | * as this is not a disconnect. | |
5417 | */ | |
f0690a25 GR |
5418 | tcpm_set_vbus(port, false); |
5419 | port->explicit_contract = false; | |
b965b631 | 5420 | /* allow time for Vbus discharge, must be < tSrcSwapStdby */ |
f0690a25 | 5421 | tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, |
b965b631 | 5422 | PD_T_SRCSWAPSTDBY); |
f0690a25 GR |
5423 | break; |
5424 | case PR_SWAP_SRC_SNK_SOURCE_OFF: | |
5425 | tcpm_set_cc(port, TYPEC_CC_RD); | |
b965b631 BJS |
5426 | /* allow CC debounce */ |
5427 | tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED, | |
5428 | PD_T_CC_DEBOUNCE); | |
5429 | break; | |
5430 | case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: | |
050161ea GR |
5431 | /* |
5432 | * USB-PD standard, 6.2.1.4, Port Power Role: | |
5433 | * "During the Power Role Swap Sequence, for the initial Source | |
5434 | * Port, the Port Power Role field shall be set to Sink in the | |
5435 | * PS_RDY Message indicating that the initial Source’s power | |
5436 | * supply is turned off" | |
5437 | */ | |
5438 | tcpm_set_pwr_role(port, TYPEC_SINK); | |
6bd181ba | 5439 | if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY, TCPC_TX_SOP)) { |
f0690a25 GR |
5440 | tcpm_set_state(port, ERROR_RECOVERY, 0); |
5441 | break; | |
5442 | } | |
fe79d5de | 5443 | tcpm_set_state(port, ERROR_RECOVERY, PD_T_PS_SOURCE_ON_PRS); |
f0690a25 GR |
5444 | break; |
5445 | case PR_SWAP_SRC_SNK_SINK_ON: | |
59d4d06c | 5446 | tcpm_enable_auto_vbus_discharge(port, true); |
f321a02c BJS |
5447 | /* Set the vbus disconnect threshold for implicit contract */ |
5448 | tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, VSAFE5V); | |
f0690a25 GR |
5449 | tcpm_set_state(port, SNK_STARTUP, 0); |
5450 | break; | |
5451 | case PR_SWAP_SNK_SRC_SINK_OFF: | |
a826492f XY |
5452 | /* will be source, remove existing capabilities */ |
5453 | usb_power_delivery_unregister_capabilities(port->partner_source_caps); | |
5454 | port->partner_source_caps = NULL; | |
f321a02c BJS |
5455 | /* |
5456 | * Prevent vbus discharge circuit from turning on during PR_SWAP | |
5457 | * as this is not a disconnect. | |
5458 | */ | |
5459 | tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, | |
5460 | port->pps_data.active, 0); | |
f0690a25 GR |
5461 | tcpm_set_charge(port, false); |
5462 | tcpm_set_state(port, hard_reset_state(port), | |
5463 | PD_T_PS_SOURCE_OFF); | |
5464 | break; | |
5465 | case PR_SWAP_SNK_SRC_SOURCE_ON: | |
59d4d06c | 5466 | tcpm_enable_auto_vbus_discharge(port, true); |
f0690a25 GR |
5467 | tcpm_set_cc(port, tcpm_rp_cc(port)); |
5468 | tcpm_set_vbus(port, true); | |
b965b631 BJS |
5469 | /* |
5470 | * allow time VBUS ramp-up, must be < tNewSrc | |
5471 | * Also, this window overlaps with CC debounce as well. | |
5472 | * So, Wait for the max of two which is PD_T_NEWSRC | |
5473 | */ | |
5474 | tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP, | |
5475 | PD_T_NEWSRC); | |
5476 | break; | |
5477 | case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP: | |
050161ea GR |
5478 | /* |
5479 | * USB PD standard, 6.2.1.4: | |
5480 | * "Subsequent Messages initiated by the Policy Engine, | |
5481 | * such as the PS_RDY Message sent to indicate that Vbus | |
5482 | * is ready, will have the Port Power Role field set to | |
5483 | * Source." | |
5484 | */ | |
f0690a25 | 5485 | tcpm_set_pwr_role(port, TYPEC_SOURCE); |
6bd181ba | 5486 | tcpm_pd_send_control(port, PD_CTRL_PS_RDY, TCPC_TX_SOP); |
6bbe2a90 | 5487 | tcpm_set_state(port, SRC_STARTUP, PD_T_SWAP_SRC_START); |
f0690a25 GR |
5488 | break; |
5489 | ||
5490 | case VCONN_SWAP_ACCEPT: | |
6bd181ba | 5491 | tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); |
8dea75e1 | 5492 | tcpm_ams_finish(port); |
f0690a25 GR |
5493 | tcpm_set_state(port, VCONN_SWAP_START, 0); |
5494 | break; | |
5495 | case VCONN_SWAP_SEND: | |
6bd181ba | 5496 | tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP, TCPC_TX_SOP); |
f0690a25 GR |
5497 | tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT, |
5498 | PD_T_SENDER_RESPONSE); | |
5499 | break; | |
5500 | case VCONN_SWAP_SEND_TIMEOUT: | |
5501 | tcpm_swap_complete(port, -ETIMEDOUT); | |
5502 | tcpm_set_state(port, ready_state(port), 0); | |
5503 | break; | |
5504 | case VCONN_SWAP_START: | |
5505 | if (port->vconn_role == TYPEC_SOURCE) | |
5506 | tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0); | |
5507 | else | |
5508 | tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0); | |
5509 | break; | |
5510 | case VCONN_SWAP_WAIT_FOR_VCONN: | |
5511 | tcpm_set_state(port, hard_reset_state(port), | |
5512 | PD_T_VCONN_SOURCE_ON); | |
5513 | break; | |
5514 | case VCONN_SWAP_TURN_ON_VCONN: | |
6bd181ba RB |
5515 | ret = tcpm_set_vconn(port, true); |
5516 | tcpm_pd_send_control(port, PD_CTRL_PS_RDY, TCPC_TX_SOP); | |
5517 | /* | |
5518 | * USB PD 3.0 Section 6.4.4.3.1 | |
5519 | * | |
5520 | * Note that a Cable Plug or VPD will not be ready for PD | |
5521 | * Communication until tVCONNStable after VCONN has been applied | |
5522 | */ | |
5523 | if (!ret) | |
5524 | tcpm_set_state(port, VCONN_SWAP_SEND_SOFT_RESET, | |
5525 | PD_T_VCONN_STABLE); | |
5526 | else | |
5527 | tcpm_set_state(port, ready_state(port), 0); | |
f0690a25 GR |
5528 | break; |
5529 | case VCONN_SWAP_TURN_OFF_VCONN: | |
5530 | tcpm_set_vconn(port, false); | |
f0690a25 GR |
5531 | tcpm_set_state(port, ready_state(port), 0); |
5532 | break; | |
6bd181ba RB |
5533 | case VCONN_SWAP_SEND_SOFT_RESET: |
5534 | tcpm_swap_complete(port, port->swap_status); | |
5535 | if (tcpm_can_communicate_sop_prime(port)) { | |
5536 | port->tx_sop_type = TCPC_TX_SOP_PRIME; | |
5537 | port->upcoming_state = SOFT_RESET_SEND; | |
5538 | tcpm_ams_start(port, SOFT_RESET_AMS); | |
5539 | } else { | |
5540 | tcpm_set_state(port, ready_state(port), 0); | |
5541 | } | |
5542 | break; | |
f0690a25 GR |
5543 | |
5544 | case DR_SWAP_CANCEL: | |
5545 | case PR_SWAP_CANCEL: | |
5546 | case VCONN_SWAP_CANCEL: | |
5547 | tcpm_swap_complete(port, port->swap_status); | |
5548 | if (port->pwr_role == TYPEC_SOURCE) | |
5549 | tcpm_set_state(port, SRC_READY, 0); | |
5550 | else | |
5551 | tcpm_set_state(port, SNK_READY, 0); | |
5552 | break; | |
8dc4bd07 BJS |
5553 | case FR_SWAP_CANCEL: |
5554 | if (port->pwr_role == TYPEC_SOURCE) | |
5555 | tcpm_set_state(port, SRC_READY, 0); | |
5556 | else | |
5557 | tcpm_set_state(port, SNK_READY, 0); | |
5558 | break; | |
f0690a25 GR |
5559 | |
5560 | case BIST_RX: | |
5561 | switch (BDO_MODE_MASK(port->bist_request)) { | |
5562 | case BDO_MODE_CARRIER2: | |
5563 | tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL); | |
6e1c2241 BJS |
5564 | tcpm_set_state(port, unattached_state(port), |
5565 | PD_T_BIST_CONT_MODE); | |
f0690a25 | 5566 | break; |
b2dcfefc BJS |
5567 | case BDO_MODE_TESTDATA: |
5568 | if (port->tcpc->set_bist_data) { | |
5569 | tcpm_log(port, "Enable BIST MODE TESTDATA"); | |
5570 | port->tcpc->set_bist_data(port->tcpc, true); | |
5571 | } | |
5572 | break; | |
f0690a25 GR |
5573 | default: |
5574 | break; | |
5575 | } | |
f0690a25 | 5576 | break; |
64f7c494 | 5577 | case GET_STATUS_SEND: |
6bd181ba | 5578 | tcpm_pd_send_control(port, PD_CTRL_GET_STATUS, TCPC_TX_SOP); |
64f7c494 AT |
5579 | tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT, |
5580 | PD_T_SENDER_RESPONSE); | |
5581 | break; | |
5582 | case GET_STATUS_SEND_TIMEOUT: | |
5583 | tcpm_set_state(port, ready_state(port), 0); | |
5584 | break; | |
5585 | case GET_PPS_STATUS_SEND: | |
6bd181ba | 5586 | tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS, TCPC_TX_SOP); |
64f7c494 AT |
5587 | tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT, |
5588 | PD_T_SENDER_RESPONSE); | |
5589 | break; | |
5590 | case GET_PPS_STATUS_SEND_TIMEOUT: | |
5591 | tcpm_set_state(port, ready_state(port), 0); | |
5592 | break; | |
8dc4bd07 | 5593 | case GET_SINK_CAP: |
6bd181ba | 5594 | tcpm_pd_send_control(port, PD_CTRL_GET_SINK_CAP, TCPC_TX_SOP); |
8dc4bd07 BJS |
5595 | tcpm_set_state(port, GET_SINK_CAP_TIMEOUT, PD_T_SENDER_RESPONSE); |
5596 | break; | |
5597 | case GET_SINK_CAP_TIMEOUT: | |
5598 | port->sink_cap_done = true; | |
5599 | tcpm_set_state(port, ready_state(port), 0); | |
5600 | break; | |
f0690a25 GR |
5601 | case ERROR_RECOVERY: |
5602 | tcpm_swap_complete(port, -EPROTO); | |
2eadc33f | 5603 | tcpm_pps_complete(port, -EPROTO); |
b17dd571 GR |
5604 | tcpm_set_state(port, PORT_RESET, 0); |
5605 | break; | |
5606 | case PORT_RESET: | |
f0690a25 | 5607 | tcpm_reset_port(port); |
197331b2 BJS |
5608 | if (port->self_powered) |
5609 | tcpm_set_cc(port, TYPEC_CC_OPEN); | |
5610 | else | |
5611 | tcpm_set_cc(port, tcpm_default_state(port) == SNK_UNATTACHED ? | |
5612 | TYPEC_CC_RD : tcpm_rp_cc(port)); | |
b17dd571 | 5613 | tcpm_set_state(port, PORT_RESET_WAIT_OFF, |
f0690a25 GR |
5614 | PD_T_ERROR_RECOVERY); |
5615 | break; | |
b17dd571 | 5616 | case PORT_RESET_WAIT_OFF: |
f0690a25 GR |
5617 | tcpm_set_state(port, |
5618 | tcpm_default_state(port), | |
5619 | port->vbus_present ? PD_T_PS_SOURCE_OFF : 0); | |
5620 | break; | |
0908c5ac KT |
5621 | |
5622 | /* AMS intermediate state */ | |
5623 | case AMS_START: | |
5624 | if (port->upcoming_state == INVALID_STATE) { | |
5625 | tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ? | |
5626 | SRC_READY : SNK_READY, 0); | |
5627 | break; | |
5628 | } | |
5629 | ||
5630 | upcoming_state = port->upcoming_state; | |
5631 | port->upcoming_state = INVALID_STATE; | |
5632 | tcpm_set_state(port, upcoming_state, 0); | |
5633 | break; | |
8dea75e1 KT |
5634 | |
5635 | /* Chunk state */ | |
5636 | case CHUNK_NOT_SUPP: | |
6bd181ba | 5637 | tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP, TCPC_TX_SOP); |
8dea75e1 KT |
5638 | tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ? SRC_READY : SNK_READY, 0); |
5639 | break; | |
af8b6270 RB |
5640 | |
5641 | /* Cable states */ | |
5642 | case SRC_VDM_IDENTITY_REQUEST: | |
5643 | port->send_discover_prime = true; | |
5644 | port->tx_sop_type = TCPC_TX_SOP_PRIME; | |
5645 | mod_send_discover_delayed_work(port, 0); | |
5646 | port->upcoming_state = SRC_SEND_CAPABILITIES; | |
5647 | break; | |
5648 | ||
f0690a25 GR |
5649 | default: |
5650 | WARN(1, "Unexpected port state %d\n", port->state); | |
5651 | break; | |
5652 | } | |
5653 | } | |
5654 | ||
3ed8e1c2 | 5655 | static void tcpm_state_machine_work(struct kthread_work *work) |
f0690a25 | 5656 | { |
3ed8e1c2 | 5657 | struct tcpm_port *port = container_of(work, struct tcpm_port, state_machine); |
f0690a25 GR |
5658 | enum tcpm_state prev_state; |
5659 | ||
5660 | mutex_lock(&port->lock); | |
5661 | port->state_machine_running = true; | |
5662 | ||
5663 | if (port->queued_message && tcpm_send_queued_message(port)) | |
5664 | goto done; | |
5665 | ||
5666 | /* If we were queued due to a delayed state change, update it now */ | |
5667 | if (port->delayed_state) { | |
5668 | tcpm_log(port, "state change %s -> %s [delayed %ld ms]", | |
5669 | tcpm_states[port->state], | |
5670 | tcpm_states[port->delayed_state], port->delay_ms); | |
5671 | port->prev_state = port->state; | |
5672 | port->state = port->delayed_state; | |
5673 | port->delayed_state = INVALID_STATE; | |
5674 | } | |
5675 | ||
5676 | /* | |
5677 | * Continue running as long as we have (non-delayed) state changes | |
5678 | * to make. | |
5679 | */ | |
5680 | do { | |
5681 | prev_state = port->state; | |
5682 | run_state_machine(port); | |
5683 | if (port->queued_message) | |
5684 | tcpm_send_queued_message(port); | |
5685 | } while (port->state != prev_state && !port->delayed_state); | |
5686 | ||
5687 | done: | |
5688 | port->state_machine_running = false; | |
5689 | mutex_unlock(&port->lock); | |
5690 | } | |
5691 | ||
5692 | static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1, | |
5693 | enum typec_cc_status cc2) | |
5694 | { | |
5695 | enum typec_cc_status old_cc1, old_cc2; | |
5696 | enum tcpm_state new_state; | |
5697 | ||
5698 | old_cc1 = port->cc1; | |
5699 | old_cc2 = port->cc2; | |
5700 | port->cc1 = cc1; | |
5701 | port->cc2 = cc2; | |
5702 | ||
5703 | tcpm_log_force(port, | |
5704 | "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]", | |
5705 | old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state], | |
5706 | port->polarity, | |
5707 | tcpm_port_is_disconnected(port) ? "disconnected" | |
5708 | : "connected"); | |
5709 | ||
5710 | switch (port->state) { | |
7893f9e1 | 5711 | case TOGGLING: |
f0690a25 GR |
5712 | if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) || |
5713 | tcpm_port_is_source(port)) | |
5714 | tcpm_set_state(port, SRC_ATTACH_WAIT, 0); | |
5715 | else if (tcpm_port_is_sink(port)) | |
5716 | tcpm_set_state(port, SNK_ATTACH_WAIT, 0); | |
5717 | break; | |
599f008c BJS |
5718 | case CHECK_CONTAMINANT: |
5719 | /* Wait for Toggling to be resumed */ | |
5720 | break; | |
f0690a25 GR |
5721 | case SRC_UNATTACHED: |
5722 | case ACC_UNATTACHED: | |
5723 | if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) || | |
5724 | tcpm_port_is_source(port)) | |
5725 | tcpm_set_state(port, SRC_ATTACH_WAIT, 0); | |
5726 | break; | |
5727 | case SRC_ATTACH_WAIT: | |
5728 | if (tcpm_port_is_disconnected(port) || | |
5729 | tcpm_port_is_audio_detached(port)) | |
5730 | tcpm_set_state(port, SRC_UNATTACHED, 0); | |
5731 | else if (cc1 != old_cc1 || cc2 != old_cc2) | |
5732 | tcpm_set_state(port, SRC_ATTACH_WAIT, 0); | |
5733 | break; | |
5734 | case SRC_ATTACHED: | |
6d91017a | 5735 | case SRC_STARTUP: |
f3b73364 BJS |
5736 | case SRC_SEND_CAPABILITIES: |
5737 | case SRC_READY: | |
5738 | if (tcpm_port_is_disconnected(port) || | |
67540460 LJ |
5739 | !tcpm_port_is_source(port)) { |
5740 | if (port->port_type == TYPEC_PORT_SRC) | |
3287f58b | 5741 | tcpm_set_state(port, SRC_UNATTACHED, tcpm_wait_for_discharge(port)); |
67540460 | 5742 | else |
3287f58b | 5743 | tcpm_set_state(port, SNK_UNATTACHED, tcpm_wait_for_discharge(port)); |
67540460 | 5744 | } |
f0690a25 | 5745 | break; |
f0690a25 GR |
5746 | case SNK_UNATTACHED: |
5747 | if (tcpm_port_is_sink(port)) | |
5748 | tcpm_set_state(port, SNK_ATTACH_WAIT, 0); | |
5749 | break; | |
5750 | case SNK_ATTACH_WAIT: | |
5751 | if ((port->cc1 == TYPEC_CC_OPEN && | |
5752 | port->cc2 != TYPEC_CC_OPEN) || | |
5753 | (port->cc1 != TYPEC_CC_OPEN && | |
5754 | port->cc2 == TYPEC_CC_OPEN)) | |
5755 | new_state = SNK_DEBOUNCED; | |
5756 | else if (tcpm_port_is_disconnected(port)) | |
5757 | new_state = SNK_UNATTACHED; | |
5758 | else | |
5759 | break; | |
5760 | if (new_state != port->delayed_state) | |
5761 | tcpm_set_state(port, SNK_ATTACH_WAIT, 0); | |
5762 | break; | |
5763 | case SNK_DEBOUNCED: | |
5764 | if (tcpm_port_is_disconnected(port)) | |
5765 | new_state = SNK_UNATTACHED; | |
5766 | else if (port->vbus_present) | |
5767 | new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED; | |
5768 | else | |
5769 | new_state = SNK_UNATTACHED; | |
5770 | if (new_state != port->delayed_state) | |
5771 | tcpm_set_state(port, SNK_DEBOUNCED, 0); | |
5772 | break; | |
5773 | case SNK_READY: | |
3287f58b BJS |
5774 | /* |
5775 | * EXIT condition is based primarily on vbus disconnect and CC is secondary. | |
5776 | * "A port that has entered into USB PD communications with the Source and | |
5777 | * has seen the CC voltage exceed vRd-USB may monitor the CC pin to detect | |
5778 | * cable disconnect in addition to monitoring VBUS. | |
5779 | * | |
5780 | * A port that is monitoring the CC voltage for disconnect (but is not in | |
5781 | * the process of a USB PD PR_Swap or USB PD FR_Swap) shall transition to | |
5782 | * Unattached.SNK within tSinkDisconnect after the CC voltage remains below | |
5783 | * vRd-USB for tPDDebounce." | |
5784 | * | |
5785 | * When set_auto_vbus_discharge_threshold is enabled, CC pins go | |
5786 | * away before vbus decays to disconnect threshold. Allow | |
5787 | * disconnect to be driven by vbus disconnect when auto vbus | |
5788 | * discharge is enabled. | |
5789 | */ | |
5790 | if (!port->auto_vbus_discharge_enabled && tcpm_port_is_disconnected(port)) | |
f0690a25 GR |
5791 | tcpm_set_state(port, unattached_state(port), 0); |
5792 | else if (!port->pd_capable && | |
5793 | (cc1 != old_cc1 || cc2 != old_cc2)) | |
5794 | tcpm_set_current_limit(port, | |
5795 | tcpm_get_current_limit(port), | |
5796 | 5000); | |
5797 | break; | |
5798 | ||
5799 | case AUDIO_ACC_ATTACHED: | |
5800 | if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN) | |
5801 | tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0); | |
5802 | break; | |
5803 | case AUDIO_ACC_DEBOUNCE: | |
5804 | if (tcpm_port_is_audio(port)) | |
5805 | tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0); | |
5806 | break; | |
5807 | ||
5808 | case DEBUG_ACC_ATTACHED: | |
5809 | if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN) | |
5810 | tcpm_set_state(port, ACC_UNATTACHED, 0); | |
5811 | break; | |
5812 | ||
5813 | case SNK_TRY: | |
5814 | /* Do nothing, waiting for timeout */ | |
5815 | break; | |
5816 | ||
5817 | case SNK_DISCOVERY: | |
5818 | /* CC line is unstable, wait for debounce */ | |
5819 | if (tcpm_port_is_disconnected(port)) | |
5820 | tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0); | |
5821 | break; | |
5822 | case SNK_DISCOVERY_DEBOUNCE: | |
5823 | break; | |
5824 | ||
5825 | case SRC_TRYWAIT: | |
5826 | /* Hand over to state machine if needed */ | |
5827 | if (!port->vbus_present && tcpm_port_is_source(port)) | |
02d5be46 BJS |
5828 | tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0); |
5829 | break; | |
5830 | case SRC_TRYWAIT_DEBOUNCE: | |
5831 | if (port->vbus_present || !tcpm_port_is_source(port)) | |
f0690a25 GR |
5832 | tcpm_set_state(port, SRC_TRYWAIT, 0); |
5833 | break; | |
a0a3e04e BJS |
5834 | case SNK_TRY_WAIT_DEBOUNCE: |
5835 | if (!tcpm_port_is_sink(port)) { | |
5836 | port->max_wait = 0; | |
5837 | tcpm_set_state(port, SRC_TRYWAIT, 0); | |
f0690a25 | 5838 | } |
f0690a25 | 5839 | break; |
131c7d12 | 5840 | case SRC_TRY_WAIT: |
c79d92bd BJS |
5841 | if (tcpm_port_is_source(port)) |
5842 | tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0); | |
f0690a25 GR |
5843 | break; |
5844 | case SRC_TRY_DEBOUNCE: | |
131c7d12 | 5845 | tcpm_set_state(port, SRC_TRY_WAIT, 0); |
f0690a25 GR |
5846 | break; |
5847 | case SNK_TRYWAIT_DEBOUNCE: | |
af450ebb BJS |
5848 | if (tcpm_port_is_sink(port)) |
5849 | tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0); | |
5850 | break; | |
5851 | case SNK_TRYWAIT_VBUS: | |
5852 | if (!tcpm_port_is_sink(port)) | |
f0690a25 GR |
5853 | tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0); |
5854 | break; | |
11e5e568 BJS |
5855 | case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS: |
5856 | if (!tcpm_port_is_sink(port)) | |
5857 | tcpm_set_state(port, SRC_TRYWAIT, PD_T_TRY_CC_DEBOUNCE); | |
5858 | else | |
5859 | tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS, 0); | |
5860 | break; | |
af450ebb BJS |
5861 | case SNK_TRYWAIT: |
5862 | /* Do nothing, waiting for tCCDebounce */ | |
5863 | break; | |
f0690a25 GR |
5864 | case PR_SWAP_SNK_SRC_SINK_OFF: |
5865 | case PR_SWAP_SRC_SNK_TRANSITION_OFF: | |
5866 | case PR_SWAP_SRC_SNK_SOURCE_OFF: | |
b965b631 BJS |
5867 | case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: |
5868 | case PR_SWAP_SNK_SRC_SOURCE_ON: | |
f0690a25 | 5869 | /* |
b965b631 | 5870 | * CC state change is expected in PR_SWAP |
f0690a25 GR |
5871 | * Ignore it. |
5872 | */ | |
5873 | break; | |
8dc4bd07 BJS |
5874 | case FR_SWAP_SEND: |
5875 | case FR_SWAP_SEND_TIMEOUT: | |
5876 | case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF: | |
5877 | case FR_SWAP_SNK_SRC_NEW_SINK_READY: | |
5878 | case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED: | |
5879 | /* Do nothing, CC change expected */ | |
5880 | break; | |
f0690a25 | 5881 | |
90178974 BJS |
5882 | case PORT_RESET: |
5883 | case PORT_RESET_WAIT_OFF: | |
5884 | /* | |
5885 | * State set back to default mode once the timer completes. | |
5886 | * Ignore CC changes here. | |
5887 | */ | |
5888 | break; | |
f0690a25 | 5889 | default: |
3287f58b BJS |
5890 | /* |
5891 | * While acting as sink and auto vbus discharge is enabled, Allow disconnect | |
5892 | * to be driven by vbus disconnect. | |
5893 | */ | |
5894 | if (tcpm_port_is_disconnected(port) && !(port->pwr_role == TYPEC_SINK && | |
5895 | port->auto_vbus_discharge_enabled)) | |
f0690a25 GR |
5896 | tcpm_set_state(port, unattached_state(port), 0); |
5897 | break; | |
5898 | } | |
5899 | } | |
5900 | ||
5901 | static void _tcpm_pd_vbus_on(struct tcpm_port *port) | |
5902 | { | |
f0690a25 GR |
5903 | tcpm_log_force(port, "VBUS on"); |
5904 | port->vbus_present = true; | |
28b43d3d BJS |
5905 | /* |
5906 | * When vbus_present is true i.e. Voltage at VBUS is greater than VSAFE5V implicitly | |
5907 | * states that vbus is not at VSAFE0V, hence clear the vbus_vsafe0v flag here. | |
5908 | */ | |
5909 | port->vbus_vsafe0v = false; | |
5910 | ||
f0690a25 GR |
5911 | switch (port->state) { |
5912 | case SNK_TRANSITION_SINK_VBUS: | |
8bf05746 | 5913 | port->explicit_contract = true; |
f0690a25 GR |
5914 | tcpm_set_state(port, SNK_READY, 0); |
5915 | break; | |
5916 | case SNK_DISCOVERY: | |
5917 | tcpm_set_state(port, SNK_DISCOVERY, 0); | |
5918 | break; | |
5919 | ||
5920 | case SNK_DEBOUNCED: | |
5921 | tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY | |
5922 | : SNK_ATTACHED, | |
5923 | 0); | |
5924 | break; | |
5925 | case SNK_HARD_RESET_WAIT_VBUS: | |
5926 | tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0); | |
5927 | break; | |
5928 | case SRC_ATTACHED: | |
5929 | tcpm_set_state(port, SRC_STARTUP, 0); | |
5930 | break; | |
5931 | case SRC_HARD_RESET_VBUS_ON: | |
5932 | tcpm_set_state(port, SRC_STARTUP, 0); | |
5933 | break; | |
5934 | ||
5935 | case SNK_TRY: | |
5936 | /* Do nothing, waiting for timeout */ | |
5937 | break; | |
5938 | case SRC_TRYWAIT: | |
02d5be46 BJS |
5939 | /* Do nothing, Waiting for Rd to be detected */ |
5940 | break; | |
5941 | case SRC_TRYWAIT_DEBOUNCE: | |
5942 | tcpm_set_state(port, SRC_TRYWAIT, 0); | |
f0690a25 | 5943 | break; |
a0a3e04e BJS |
5944 | case SNK_TRY_WAIT_DEBOUNCE: |
5945 | /* Do nothing, waiting for PD_DEBOUNCE to do be done */ | |
f0690a25 GR |
5946 | break; |
5947 | case SNK_TRYWAIT: | |
af450ebb BJS |
5948 | /* Do nothing, waiting for tCCDebounce */ |
5949 | break; | |
5950 | case SNK_TRYWAIT_VBUS: | |
5951 | if (tcpm_port_is_sink(port)) | |
5952 | tcpm_set_state(port, SNK_ATTACHED, 0); | |
5953 | break; | |
5954 | case SNK_TRYWAIT_DEBOUNCE: | |
5955 | /* Do nothing, waiting for Rp */ | |
f0690a25 | 5956 | break; |
11e5e568 BJS |
5957 | case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS: |
5958 | if (port->vbus_present && tcpm_port_is_sink(port)) | |
5959 | tcpm_set_state(port, SNK_ATTACHED, 0); | |
5960 | break; | |
131c7d12 BJS |
5961 | case SRC_TRY_WAIT: |
5962 | case SRC_TRY_DEBOUNCE: | |
5963 | /* Do nothing, waiting for sink detection */ | |
5964 | break; | |
a30a00e3 BJS |
5965 | case FR_SWAP_SEND: |
5966 | case FR_SWAP_SEND_TIMEOUT: | |
5967 | case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF: | |
5968 | case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED: | |
5969 | if (port->tcpc->frs_sourcing_vbus) | |
5970 | port->tcpc->frs_sourcing_vbus(port->tcpc); | |
5971 | break; | |
8dc4bd07 | 5972 | case FR_SWAP_SNK_SRC_NEW_SINK_READY: |
a30a00e3 BJS |
5973 | if (port->tcpc->frs_sourcing_vbus) |
5974 | port->tcpc->frs_sourcing_vbus(port->tcpc); | |
8dc4bd07 BJS |
5975 | tcpm_set_state(port, FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED, 0); |
5976 | break; | |
90178974 BJS |
5977 | |
5978 | case PORT_RESET: | |
5979 | case PORT_RESET_WAIT_OFF: | |
5980 | /* | |
5981 | * State set back to default mode once the timer completes. | |
5982 | * Ignore vbus changes here. | |
5983 | */ | |
5984 | break; | |
5985 | ||
f0690a25 GR |
5986 | default: |
5987 | break; | |
5988 | } | |
5989 | } | |
5990 | ||
5991 | static void _tcpm_pd_vbus_off(struct tcpm_port *port) | |
5992 | { | |
f0690a25 GR |
5993 | tcpm_log_force(port, "VBUS off"); |
5994 | port->vbus_present = false; | |
5995 | port->vbus_never_low = false; | |
5996 | switch (port->state) { | |
5997 | case SNK_HARD_RESET_SINK_OFF: | |
5998 | tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0); | |
5999 | break; | |
f0690a25 GR |
6000 | case HARD_RESET_SEND: |
6001 | break; | |
f0690a25 GR |
6002 | case SNK_TRY: |
6003 | /* Do nothing, waiting for timeout */ | |
6004 | break; | |
6005 | case SRC_TRYWAIT: | |
6006 | /* Hand over to state machine if needed */ | |
6007 | if (tcpm_port_is_source(port)) | |
02d5be46 | 6008 | tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0); |
f0690a25 | 6009 | break; |
a0a3e04e BJS |
6010 | case SNK_TRY_WAIT_DEBOUNCE: |
6011 | /* Do nothing, waiting for PD_DEBOUNCE to do be done */ | |
f0690a25 | 6012 | break; |
af450ebb | 6013 | case SNK_TRYWAIT: |
f0690a25 | 6014 | case SNK_TRYWAIT_VBUS: |
af450ebb | 6015 | case SNK_TRYWAIT_DEBOUNCE: |
f0690a25 | 6016 | break; |
f0690a25 | 6017 | case SNK_ATTACH_WAIT: |
90b8aa9f BJS |
6018 | case SNK_DEBOUNCED: |
6019 | /* Do nothing, as TCPM is still waiting for vbus to reaach VSAFE5V to connect */ | |
f0690a25 GR |
6020 | break; |
6021 | ||
6022 | case SNK_NEGOTIATE_CAPABILITIES: | |
6023 | break; | |
6024 | ||
6025 | case PR_SWAP_SRC_SNK_TRANSITION_OFF: | |
6026 | tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0); | |
6027 | break; | |
6028 | ||
6029 | case PR_SWAP_SNK_SRC_SINK_OFF: | |
6030 | /* Do nothing, expected */ | |
6031 | break; | |
6032 | ||
7abc6ca5 BJS |
6033 | case PR_SWAP_SNK_SRC_SOURCE_ON: |
6034 | /* | |
6035 | * Do nothing when vbus off notification is received. | |
6036 | * TCPM can wait for PD_T_NEWSRC in PR_SWAP_SNK_SRC_SOURCE_ON | |
6037 | * for the vbus source to ramp up. | |
6038 | */ | |
6039 | break; | |
6040 | ||
b17dd571 | 6041 | case PORT_RESET_WAIT_OFF: |
c749d4d0 | 6042 | tcpm_set_state(port, tcpm_default_state(port), 0); |
f0690a25 | 6043 | break; |
90178974 | 6044 | |
131c7d12 BJS |
6045 | case SRC_TRY_WAIT: |
6046 | case SRC_TRY_DEBOUNCE: | |
6047 | /* Do nothing, waiting for sink detection */ | |
6048 | break; | |
90178974 | 6049 | |
7771bcc7 BJS |
6050 | case SRC_STARTUP: |
6051 | case SRC_SEND_CAPABILITIES: | |
6052 | case SRC_SEND_CAPABILITIES_TIMEOUT: | |
6053 | case SRC_NEGOTIATE_CAPABILITIES: | |
6054 | case SRC_TRANSITION_SUPPLY: | |
6055 | case SRC_READY: | |
6056 | case SRC_WAIT_NEW_CAPABILITIES: | |
3287f58b BJS |
6057 | /* |
6058 | * Force to unattached state to re-initiate connection. | |
6059 | * DRP port should move to Unattached.SNK instead of Unattached.SRC if | |
6060 | * sink removed. Although sink removal here is due to source's vbus collapse, | |
6061 | * treat it the same way for consistency. | |
6062 | */ | |
6063 | if (port->port_type == TYPEC_PORT_SRC) | |
6064 | tcpm_set_state(port, SRC_UNATTACHED, tcpm_wait_for_discharge(port)); | |
6065 | else | |
6066 | tcpm_set_state(port, SNK_UNATTACHED, tcpm_wait_for_discharge(port)); | |
7771bcc7 BJS |
6067 | break; |
6068 | ||
90178974 BJS |
6069 | case PORT_RESET: |
6070 | /* | |
6071 | * State set back to default mode once the timer completes. | |
6072 | * Ignore vbus changes here. | |
6073 | */ | |
6074 | break; | |
6075 | ||
8dc4bd07 BJS |
6076 | case FR_SWAP_SEND: |
6077 | case FR_SWAP_SEND_TIMEOUT: | |
6078 | case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF: | |
6079 | case FR_SWAP_SNK_SRC_NEW_SINK_READY: | |
6080 | case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED: | |
6081 | /* Do nothing, vbus drop expected */ | |
6082 | break; | |
6083 | ||
4270d2b4 BJS |
6084 | case SNK_HARD_RESET_WAIT_VBUS: |
6085 | /* Do nothing, its OK to receive vbus off events */ | |
6086 | break; | |
6087 | ||
f0690a25 | 6088 | default: |
3287f58b BJS |
6089 | if (port->pwr_role == TYPEC_SINK && port->attached) |
6090 | tcpm_set_state(port, SNK_UNATTACHED, tcpm_wait_for_discharge(port)); | |
f0690a25 GR |
6091 | break; |
6092 | } | |
6093 | } | |
6094 | ||
28b43d3d BJS |
6095 | static void _tcpm_pd_vbus_vsafe0v(struct tcpm_port *port) |
6096 | { | |
6097 | tcpm_log_force(port, "VBUS VSAFE0V"); | |
6098 | port->vbus_vsafe0v = true; | |
6099 | switch (port->state) { | |
6100 | case SRC_HARD_RESET_VBUS_OFF: | |
6101 | /* | |
6102 | * After establishing the vSafe0V voltage condition on VBUS, the Source Shall wait | |
6103 | * tSrcRecover before re-applying VCONN and restoring VBUS to vSafe5V. | |
6104 | */ | |
6105 | tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER); | |
6106 | break; | |
6107 | case SRC_ATTACH_WAIT: | |
6108 | if (tcpm_port_is_source(port)) | |
6109 | tcpm_set_state(port, tcpm_try_snk(port) ? SNK_TRY : SRC_ATTACHED, | |
6110 | PD_T_CC_DEBOUNCE); | |
6111 | break; | |
3287f58b BJS |
6112 | case SRC_STARTUP: |
6113 | case SRC_SEND_CAPABILITIES: | |
6114 | case SRC_SEND_CAPABILITIES_TIMEOUT: | |
6115 | case SRC_NEGOTIATE_CAPABILITIES: | |
6116 | case SRC_TRANSITION_SUPPLY: | |
6117 | case SRC_READY: | |
6118 | case SRC_WAIT_NEW_CAPABILITIES: | |
6119 | if (port->auto_vbus_discharge_enabled) { | |
6120 | if (port->port_type == TYPEC_PORT_SRC) | |
6121 | tcpm_set_state(port, SRC_UNATTACHED, 0); | |
6122 | else | |
6123 | tcpm_set_state(port, SNK_UNATTACHED, 0); | |
6124 | } | |
6125 | break; | |
d112efbe | 6126 | case PR_SWAP_SNK_SRC_SINK_OFF: |
fed09e0b | 6127 | case PR_SWAP_SNK_SRC_SOURCE_ON: |
d112efbe BJS |
6128 | /* Do nothing, vsafe0v is expected during transition */ |
6129 | break; | |
746f96e7 BJS |
6130 | case SNK_ATTACH_WAIT: |
6131 | case SNK_DEBOUNCED: | |
6132 | /*Do nothing, still waiting for VSAFE5V for connect */ | |
6133 | break; | |
4270d2b4 BJS |
6134 | case SNK_HARD_RESET_WAIT_VBUS: |
6135 | /* Do nothing, its OK to receive vbus off events */ | |
6136 | break; | |
28b43d3d | 6137 | default: |
3287f58b BJS |
6138 | if (port->pwr_role == TYPEC_SINK && port->auto_vbus_discharge_enabled) |
6139 | tcpm_set_state(port, SNK_UNATTACHED, 0); | |
28b43d3d BJS |
6140 | break; |
6141 | } | |
6142 | } | |
6143 | ||
f0690a25 GR |
6144 | static void _tcpm_pd_hard_reset(struct tcpm_port *port) |
6145 | { | |
6146 | tcpm_log_force(port, "Received hard reset"); | |
6e1c2241 BJS |
6147 | if (port->bist_request == BDO_MODE_TESTDATA && port->tcpc->set_bist_data) |
6148 | port->tcpc->set_bist_data(port->tcpc, false); | |
6149 | ||
a6fe37f4 BJS |
6150 | switch (port->state) { |
6151 | case ERROR_RECOVERY: | |
6152 | case PORT_RESET: | |
6153 | case PORT_RESET_WAIT_OFF: | |
6154 | return; | |
6155 | default: | |
6156 | break; | |
6157 | } | |
6158 | ||
0908c5ac KT |
6159 | if (port->ams != NONE_AMS) |
6160 | port->ams = NONE_AMS; | |
8dea75e1 KT |
6161 | if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) |
6162 | port->ams = HARD_RESET; | |
f0690a25 GR |
6163 | /* |
6164 | * If we keep receiving hard reset requests, executing the hard reset | |
6165 | * must have failed. Revert to error recovery if that happens. | |
6166 | */ | |
6167 | tcpm_set_state(port, | |
6168 | port->hard_reset_count < PD_N_HARD_RESET_COUNT ? | |
6169 | HARD_RESET_START : ERROR_RECOVERY, | |
6170 | 0); | |
6171 | } | |
6172 | ||
3ed8e1c2 | 6173 | static void tcpm_pd_event_handler(struct kthread_work *work) |
f0690a25 GR |
6174 | { |
6175 | struct tcpm_port *port = container_of(work, struct tcpm_port, | |
6176 | event_work); | |
6177 | u32 events; | |
6178 | ||
6179 | mutex_lock(&port->lock); | |
6180 | ||
6181 | spin_lock(&port->pd_event_lock); | |
6182 | while (port->pd_events) { | |
6183 | events = port->pd_events; | |
6184 | port->pd_events = 0; | |
6185 | spin_unlock(&port->pd_event_lock); | |
6186 | if (events & TCPM_RESET_EVENT) | |
6187 | _tcpm_pd_hard_reset(port); | |
6188 | if (events & TCPM_VBUS_EVENT) { | |
6189 | bool vbus; | |
6190 | ||
6191 | vbus = port->tcpc->get_vbus(port->tcpc); | |
28b43d3d | 6192 | if (vbus) { |
f0690a25 | 6193 | _tcpm_pd_vbus_on(port); |
28b43d3d | 6194 | } else { |
f0690a25 | 6195 | _tcpm_pd_vbus_off(port); |
28b43d3d BJS |
6196 | /* |
6197 | * When TCPC does not support detecting vsafe0v voltage level, | |
6198 | * treat vbus absent as vsafe0v. Else invoke is_vbus_vsafe0v | |
6199 | * to see if vbus has discharge to VSAFE0V. | |
6200 | */ | |
6201 | if (!port->tcpc->is_vbus_vsafe0v || | |
6202 | port->tcpc->is_vbus_vsafe0v(port->tcpc)) | |
6203 | _tcpm_pd_vbus_vsafe0v(port); | |
6204 | } | |
f0690a25 GR |
6205 | } |
6206 | if (events & TCPM_CC_EVENT) { | |
6207 | enum typec_cc_status cc1, cc2; | |
6208 | ||
6209 | if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0) | |
6210 | _tcpm_cc_change(port, cc1, cc2); | |
6211 | } | |
8dc4bd07 | 6212 | if (events & TCPM_FRS_EVENT) { |
0908c5ac KT |
6213 | if (port->state == SNK_READY) { |
6214 | int ret; | |
6215 | ||
6216 | port->upcoming_state = FR_SWAP_SEND; | |
6217 | ret = tcpm_ams_start(port, FAST_ROLE_SWAP); | |
6218 | if (ret == -EAGAIN) | |
6219 | port->upcoming_state = INVALID_STATE; | |
6220 | } else { | |
8dc4bd07 | 6221 | tcpm_log(port, "Discarding FRS_SIGNAL! Not in sink ready"); |
0908c5ac | 6222 | } |
8dc4bd07 BJS |
6223 | } |
6224 | if (events & TCPM_SOURCING_VBUS) { | |
6225 | tcpm_log(port, "sourcing vbus"); | |
6226 | /* | |
6227 | * In fast role swap case TCPC autonomously sources vbus. Set vbus_source | |
6228 | * true as TCPM wouldn't have called tcpm_set_vbus. | |
6229 | * | |
6230 | * When vbus is sourced on the command on TCPM i.e. TCPM called | |
6231 | * tcpm_set_vbus to source vbus, vbus_source would already be true. | |
6232 | */ | |
6233 | port->vbus_source = true; | |
6234 | _tcpm_pd_vbus_on(port); | |
6235 | } | |
599f008c BJS |
6236 | if (events & TCPM_PORT_CLEAN) { |
6237 | tcpm_log(port, "port clean"); | |
6238 | if (port->state == CHECK_CONTAMINANT) { | |
6239 | if (tcpm_start_toggling(port, tcpm_rp_cc(port))) | |
6240 | tcpm_set_state(port, TOGGLING, 0); | |
6241 | else | |
6242 | tcpm_set_state(port, tcpm_default_state(port), 0); | |
6243 | } | |
6244 | } | |
db9e5470 RB |
6245 | if (events & TCPM_PORT_ERROR) { |
6246 | tcpm_log(port, "port triggering error recovery"); | |
6247 | tcpm_set_state(port, ERROR_RECOVERY, 0); | |
6248 | } | |
8dc4bd07 | 6249 | |
f0690a25 GR |
6250 | spin_lock(&port->pd_event_lock); |
6251 | } | |
6252 | spin_unlock(&port->pd_event_lock); | |
6253 | mutex_unlock(&port->lock); | |
6254 | } | |
6255 | ||
6256 | void tcpm_cc_change(struct tcpm_port *port) | |
6257 | { | |
6258 | spin_lock(&port->pd_event_lock); | |
6259 | port->pd_events |= TCPM_CC_EVENT; | |
6260 | spin_unlock(&port->pd_event_lock); | |
3ed8e1c2 | 6261 | kthread_queue_work(port->wq, &port->event_work); |
f0690a25 GR |
6262 | } |
6263 | EXPORT_SYMBOL_GPL(tcpm_cc_change); | |
6264 | ||
6265 | void tcpm_vbus_change(struct tcpm_port *port) | |
6266 | { | |
6267 | spin_lock(&port->pd_event_lock); | |
6268 | port->pd_events |= TCPM_VBUS_EVENT; | |
6269 | spin_unlock(&port->pd_event_lock); | |
3ed8e1c2 | 6270 | kthread_queue_work(port->wq, &port->event_work); |
f0690a25 GR |
6271 | } |
6272 | EXPORT_SYMBOL_GPL(tcpm_vbus_change); | |
6273 | ||
6274 | void tcpm_pd_hard_reset(struct tcpm_port *port) | |
6275 | { | |
6276 | spin_lock(&port->pd_event_lock); | |
6277 | port->pd_events = TCPM_RESET_EVENT; | |
6278 | spin_unlock(&port->pd_event_lock); | |
3ed8e1c2 | 6279 | kthread_queue_work(port->wq, &port->event_work); |
f0690a25 GR |
6280 | } |
6281 | EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset); | |
6282 | ||
8dc4bd07 BJS |
6283 | void tcpm_sink_frs(struct tcpm_port *port) |
6284 | { | |
6285 | spin_lock(&port->pd_event_lock); | |
43ad944c | 6286 | port->pd_events |= TCPM_FRS_EVENT; |
8dc4bd07 BJS |
6287 | spin_unlock(&port->pd_event_lock); |
6288 | kthread_queue_work(port->wq, &port->event_work); | |
6289 | } | |
6290 | EXPORT_SYMBOL_GPL(tcpm_sink_frs); | |
6291 | ||
6292 | void tcpm_sourcing_vbus(struct tcpm_port *port) | |
6293 | { | |
6294 | spin_lock(&port->pd_event_lock); | |
43ad944c | 6295 | port->pd_events |= TCPM_SOURCING_VBUS; |
8dc4bd07 BJS |
6296 | spin_unlock(&port->pd_event_lock); |
6297 | kthread_queue_work(port->wq, &port->event_work); | |
6298 | } | |
6299 | EXPORT_SYMBOL_GPL(tcpm_sourcing_vbus); | |
6300 | ||
599f008c BJS |
6301 | void tcpm_port_clean(struct tcpm_port *port) |
6302 | { | |
6303 | spin_lock(&port->pd_event_lock); | |
6304 | port->pd_events |= TCPM_PORT_CLEAN; | |
6305 | spin_unlock(&port->pd_event_lock); | |
6306 | kthread_queue_work(port->wq, &port->event_work); | |
6307 | } | |
6308 | EXPORT_SYMBOL_GPL(tcpm_port_clean); | |
6309 | ||
6310 | bool tcpm_port_is_toggling(struct tcpm_port *port) | |
6311 | { | |
6312 | return port->port_type == TYPEC_PORT_DRP && port->state == TOGGLING; | |
6313 | } | |
6314 | EXPORT_SYMBOL_GPL(tcpm_port_is_toggling); | |
6315 | ||
db9e5470 RB |
6316 | void tcpm_port_error_recovery(struct tcpm_port *port) |
6317 | { | |
6318 | spin_lock(&port->pd_event_lock); | |
6319 | port->pd_events |= TCPM_PORT_ERROR; | |
6320 | spin_unlock(&port->pd_event_lock); | |
6321 | kthread_queue_work(port->wq, &port->event_work); | |
6322 | } | |
6323 | EXPORT_SYMBOL_GPL(tcpm_port_error_recovery); | |
6324 | ||
8dc4bd07 BJS |
6325 | static void tcpm_enable_frs_work(struct kthread_work *work) |
6326 | { | |
6327 | struct tcpm_port *port = container_of(work, struct tcpm_port, enable_frs); | |
0908c5ac | 6328 | int ret; |
8dc4bd07 BJS |
6329 | |
6330 | mutex_lock(&port->lock); | |
6331 | /* Not FRS capable */ | |
6332 | if (!port->connected || port->port_type != TYPEC_PORT_DRP || | |
6333 | port->pwr_opmode != TYPEC_PWR_MODE_PD || | |
6334 | !port->tcpc->enable_frs || | |
6335 | /* Sink caps queried */ | |
6336 | port->sink_cap_done || port->negotiated_rev < PD_REV30) | |
6337 | goto unlock; | |
6338 | ||
6339 | /* Send when the state machine is idle */ | |
fb7ff25a RB |
6340 | if (port->state != SNK_READY || port->vdm_sm_running || port->send_discover || |
6341 | port->send_discover_prime) | |
8dc4bd07 BJS |
6342 | goto resched; |
6343 | ||
0908c5ac KT |
6344 | port->upcoming_state = GET_SINK_CAP; |
6345 | ret = tcpm_ams_start(port, GET_SINK_CAPABILITIES); | |
6346 | if (ret == -EAGAIN) { | |
6347 | port->upcoming_state = INVALID_STATE; | |
6348 | } else { | |
6349 | port->sink_cap_done = true; | |
6350 | goto unlock; | |
6351 | } | |
8dc4bd07 BJS |
6352 | resched: |
6353 | mod_enable_frs_delayed_work(port, GET_SINK_CAP_RETRY_MS); | |
6354 | unlock: | |
6355 | mutex_unlock(&port->lock); | |
6356 | } | |
6357 | ||
c34e85fa KT |
6358 | static void tcpm_send_discover_work(struct kthread_work *work) |
6359 | { | |
6360 | struct tcpm_port *port = container_of(work, struct tcpm_port, send_discover_work); | |
6361 | ||
6362 | mutex_lock(&port->lock); | |
6363 | /* No need to send DISCOVER_IDENTITY anymore */ | |
fb7ff25a | 6364 | if (!port->send_discover && !port->send_discover_prime) |
c34e85fa KT |
6365 | goto unlock; |
6366 | ||
ef52b4a9 KT |
6367 | if (port->data_role == TYPEC_DEVICE && port->negotiated_rev < PD_REV30) { |
6368 | port->send_discover = false; | |
fb7ff25a | 6369 | port->send_discover_prime = false; |
ef52b4a9 KT |
6370 | goto unlock; |
6371 | } | |
6372 | ||
c34e85fa | 6373 | /* Retry if the port is not idle */ |
af8b6270 RB |
6374 | if ((port->state != SRC_READY && port->state != SNK_READY && |
6375 | port->state != SRC_VDM_IDENTITY_REQUEST) || port->vdm_sm_running) { | |
c34e85fa KT |
6376 | mod_send_discover_delayed_work(port, SEND_DISCOVER_RETRY_MS); |
6377 | goto unlock; | |
6378 | } | |
6379 | ||
fb7ff25a | 6380 | tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0, port->tx_sop_type); |
c34e85fa KT |
6381 | |
6382 | unlock: | |
6383 | mutex_unlock(&port->lock); | |
6384 | } | |
6385 | ||
00ec21e5 | 6386 | static int tcpm_dr_set(struct typec_port *p, enum typec_data_role data) |
f0690a25 | 6387 | { |
00ec21e5 | 6388 | struct tcpm_port *port = typec_get_drvdata(p); |
f0690a25 GR |
6389 | int ret; |
6390 | ||
6391 | mutex_lock(&port->swap_lock); | |
6392 | mutex_lock(&port->lock); | |
6393 | ||
6ecc632d | 6394 | if (port->typec_caps.data != TYPEC_PORT_DRD) { |
f0690a25 GR |
6395 | ret = -EINVAL; |
6396 | goto port_unlock; | |
6397 | } | |
6398 | if (port->state != SRC_READY && port->state != SNK_READY) { | |
6399 | ret = -EAGAIN; | |
6400 | goto port_unlock; | |
6401 | } | |
6402 | ||
6403 | if (port->data_role == data) { | |
6404 | ret = 0; | |
6405 | goto port_unlock; | |
6406 | } | |
6407 | ||
6408 | /* | |
6409 | * XXX | |
6410 | * 6.3.9: If an alternate mode is active, a request to swap | |
6411 | * alternate modes shall trigger a port reset. | |
6412 | * Reject data role swap request in this case. | |
6413 | */ | |
6414 | ||
b17dd571 GR |
6415 | if (!port->pd_capable) { |
6416 | /* | |
6417 | * If the partner is not PD capable, reset the port to | |
6418 | * trigger a role change. This can only work if a preferred | |
6419 | * role is configured, and if it matches the requested role. | |
6420 | */ | |
6421 | if (port->try_role == TYPEC_NO_PREFERRED_ROLE || | |
6422 | port->try_role == port->pwr_role) { | |
6423 | ret = -EINVAL; | |
6424 | goto port_unlock; | |
6425 | } | |
6426 | port->non_pd_role_swap = true; | |
6427 | tcpm_set_state(port, PORT_RESET, 0); | |
6428 | } else { | |
0908c5ac KT |
6429 | port->upcoming_state = DR_SWAP_SEND; |
6430 | ret = tcpm_ams_start(port, DATA_ROLE_SWAP); | |
6431 | if (ret == -EAGAIN) { | |
6432 | port->upcoming_state = INVALID_STATE; | |
6433 | goto port_unlock; | |
6434 | } | |
b17dd571 GR |
6435 | } |
6436 | ||
f0690a25 GR |
6437 | port->swap_status = 0; |
6438 | port->swap_pending = true; | |
6439 | reinit_completion(&port->swap_complete); | |
f0690a25 GR |
6440 | mutex_unlock(&port->lock); |
6441 | ||
9adf9f9e GR |
6442 | if (!wait_for_completion_timeout(&port->swap_complete, |
6443 | msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT))) | |
6444 | ret = -ETIMEDOUT; | |
6445 | else | |
6446 | ret = port->swap_status; | |
f0690a25 | 6447 | |
b17dd571 | 6448 | port->non_pd_role_swap = false; |
f0690a25 GR |
6449 | goto swap_unlock; |
6450 | ||
6451 | port_unlock: | |
6452 | mutex_unlock(&port->lock); | |
6453 | swap_unlock: | |
6454 | mutex_unlock(&port->swap_lock); | |
6455 | return ret; | |
6456 | } | |
6457 | ||
00ec21e5 | 6458 | static int tcpm_pr_set(struct typec_port *p, enum typec_role role) |
f0690a25 | 6459 | { |
00ec21e5 | 6460 | struct tcpm_port *port = typec_get_drvdata(p); |
f0690a25 GR |
6461 | int ret; |
6462 | ||
6463 | mutex_lock(&port->swap_lock); | |
6464 | mutex_lock(&port->lock); | |
6465 | ||
9b0ae699 | 6466 | if (port->port_type != TYPEC_PORT_DRP) { |
f0690a25 GR |
6467 | ret = -EINVAL; |
6468 | goto port_unlock; | |
6469 | } | |
6470 | if (port->state != SRC_READY && port->state != SNK_READY) { | |
6471 | ret = -EAGAIN; | |
6472 | goto port_unlock; | |
6473 | } | |
6474 | ||
6475 | if (role == port->pwr_role) { | |
6476 | ret = 0; | |
6477 | goto port_unlock; | |
6478 | } | |
6479 | ||
0908c5ac KT |
6480 | port->upcoming_state = PR_SWAP_SEND; |
6481 | ret = tcpm_ams_start(port, POWER_ROLE_SWAP); | |
6482 | if (ret == -EAGAIN) { | |
6483 | port->upcoming_state = INVALID_STATE; | |
6484 | goto port_unlock; | |
6485 | } | |
6486 | ||
f0690a25 GR |
6487 | port->swap_status = 0; |
6488 | port->swap_pending = true; | |
6489 | reinit_completion(&port->swap_complete); | |
f0690a25 GR |
6490 | mutex_unlock(&port->lock); |
6491 | ||
9adf9f9e GR |
6492 | if (!wait_for_completion_timeout(&port->swap_complete, |
6493 | msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT))) | |
6494 | ret = -ETIMEDOUT; | |
6495 | else | |
6496 | ret = port->swap_status; | |
f0690a25 | 6497 | |
f0690a25 GR |
6498 | goto swap_unlock; |
6499 | ||
6500 | port_unlock: | |
6501 | mutex_unlock(&port->lock); | |
6502 | swap_unlock: | |
6503 | mutex_unlock(&port->swap_lock); | |
6504 | return ret; | |
6505 | } | |
6506 | ||
00ec21e5 | 6507 | static int tcpm_vconn_set(struct typec_port *p, enum typec_role role) |
f0690a25 | 6508 | { |
00ec21e5 | 6509 | struct tcpm_port *port = typec_get_drvdata(p); |
f0690a25 GR |
6510 | int ret; |
6511 | ||
6512 | mutex_lock(&port->swap_lock); | |
6513 | mutex_lock(&port->lock); | |
6514 | ||
6515 | if (port->state != SRC_READY && port->state != SNK_READY) { | |
6516 | ret = -EAGAIN; | |
6517 | goto port_unlock; | |
6518 | } | |
6519 | ||
6520 | if (role == port->vconn_role) { | |
6521 | ret = 0; | |
6522 | goto port_unlock; | |
6523 | } | |
6524 | ||
0908c5ac KT |
6525 | port->upcoming_state = VCONN_SWAP_SEND; |
6526 | ret = tcpm_ams_start(port, VCONN_SWAP); | |
6527 | if (ret == -EAGAIN) { | |
6528 | port->upcoming_state = INVALID_STATE; | |
6529 | goto port_unlock; | |
6530 | } | |
6531 | ||
f0690a25 GR |
6532 | port->swap_status = 0; |
6533 | port->swap_pending = true; | |
6534 | reinit_completion(&port->swap_complete); | |
f0690a25 GR |
6535 | mutex_unlock(&port->lock); |
6536 | ||
9adf9f9e GR |
6537 | if (!wait_for_completion_timeout(&port->swap_complete, |
6538 | msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT))) | |
6539 | ret = -ETIMEDOUT; | |
6540 | else | |
6541 | ret = port->swap_status; | |
f0690a25 | 6542 | |
f0690a25 GR |
6543 | goto swap_unlock; |
6544 | ||
6545 | port_unlock: | |
6546 | mutex_unlock(&port->lock); | |
6547 | swap_unlock: | |
6548 | mutex_unlock(&port->swap_lock); | |
6549 | return ret; | |
6550 | } | |
6551 | ||
00ec21e5 | 6552 | static int tcpm_try_role(struct typec_port *p, int role) |
f0690a25 | 6553 | { |
00ec21e5 | 6554 | struct tcpm_port *port = typec_get_drvdata(p); |
f0690a25 GR |
6555 | struct tcpc_dev *tcpc = port->tcpc; |
6556 | int ret = 0; | |
6557 | ||
6558 | mutex_lock(&port->lock); | |
6559 | if (tcpc->try_role) | |
6560 | ret = tcpc->try_role(tcpc, role); | |
a079973f | 6561 | if (!ret) |
f0690a25 GR |
6562 | port->try_role = role; |
6563 | port->try_src_count = 0; | |
6564 | port->try_snk_count = 0; | |
6565 | mutex_unlock(&port->lock); | |
6566 | ||
6567 | return ret; | |
6568 | } | |
6569 | ||
e3a07202 | 6570 | static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 req_op_curr) |
2eadc33f AT |
6571 | { |
6572 | unsigned int target_mw; | |
6573 | int ret; | |
6574 | ||
6575 | mutex_lock(&port->swap_lock); | |
6576 | mutex_lock(&port->lock); | |
6577 | ||
6578 | if (!port->pps_data.active) { | |
6579 | ret = -EOPNOTSUPP; | |
6580 | goto port_unlock; | |
6581 | } | |
6582 | ||
6583 | if (port->state != SNK_READY) { | |
6584 | ret = -EAGAIN; | |
6585 | goto port_unlock; | |
6586 | } | |
6587 | ||
e3a07202 | 6588 | if (req_op_curr > port->pps_data.max_curr) { |
2eadc33f AT |
6589 | ret = -EINVAL; |
6590 | goto port_unlock; | |
6591 | } | |
6592 | ||
e3a07202 | 6593 | target_mw = (req_op_curr * port->supply_voltage) / 1000; |
2eadc33f AT |
6594 | if (target_mw < port->operating_snk_mw) { |
6595 | ret = -EINVAL; | |
6596 | goto port_unlock; | |
6597 | } | |
6598 | ||
0908c5ac KT |
6599 | port->upcoming_state = SNK_NEGOTIATE_PPS_CAPABILITIES; |
6600 | ret = tcpm_ams_start(port, POWER_NEGOTIATION); | |
6601 | if (ret == -EAGAIN) { | |
6602 | port->upcoming_state = INVALID_STATE; | |
6603 | goto port_unlock; | |
6604 | } | |
6605 | ||
554fab6d | 6606 | /* Round down operating current to align with PPS valid steps */ |
e3a07202 | 6607 | req_op_curr = req_op_curr - (req_op_curr % RDO_PROG_CURR_MA_STEP); |
554fab6d | 6608 | |
2eadc33f | 6609 | reinit_completion(&port->pps_complete); |
e3a07202 | 6610 | port->pps_data.req_op_curr = req_op_curr; |
2eadc33f AT |
6611 | port->pps_status = 0; |
6612 | port->pps_pending = true; | |
2eadc33f AT |
6613 | mutex_unlock(&port->lock); |
6614 | ||
6615 | if (!wait_for_completion_timeout(&port->pps_complete, | |
6616 | msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) | |
6617 | ret = -ETIMEDOUT; | |
6618 | else | |
6619 | ret = port->pps_status; | |
6620 | ||
6621 | goto swap_unlock; | |
6622 | ||
6623 | port_unlock: | |
6624 | mutex_unlock(&port->lock); | |
6625 | swap_unlock: | |
6626 | mutex_unlock(&port->swap_lock); | |
6627 | ||
6628 | return ret; | |
6629 | } | |
6630 | ||
e3a07202 | 6631 | static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 req_out_volt) |
2eadc33f AT |
6632 | { |
6633 | unsigned int target_mw; | |
6634 | int ret; | |
6635 | ||
6636 | mutex_lock(&port->swap_lock); | |
6637 | mutex_lock(&port->lock); | |
6638 | ||
6639 | if (!port->pps_data.active) { | |
6640 | ret = -EOPNOTSUPP; | |
6641 | goto port_unlock; | |
6642 | } | |
6643 | ||
6644 | if (port->state != SNK_READY) { | |
6645 | ret = -EAGAIN; | |
6646 | goto port_unlock; | |
6647 | } | |
6648 | ||
e3a07202 | 6649 | target_mw = (port->current_limit * req_out_volt) / 1000; |
2eadc33f AT |
6650 | if (target_mw < port->operating_snk_mw) { |
6651 | ret = -EINVAL; | |
6652 | goto port_unlock; | |
6653 | } | |
6654 | ||
0908c5ac KT |
6655 | port->upcoming_state = SNK_NEGOTIATE_PPS_CAPABILITIES; |
6656 | ret = tcpm_ams_start(port, POWER_NEGOTIATION); | |
6657 | if (ret == -EAGAIN) { | |
6658 | port->upcoming_state = INVALID_STATE; | |
6659 | goto port_unlock; | |
6660 | } | |
6661 | ||
554fab6d | 6662 | /* Round down output voltage to align with PPS valid steps */ |
e3a07202 | 6663 | req_out_volt = req_out_volt - (req_out_volt % RDO_PROG_VOLT_MV_STEP); |
554fab6d | 6664 | |
2eadc33f | 6665 | reinit_completion(&port->pps_complete); |
e3a07202 | 6666 | port->pps_data.req_out_volt = req_out_volt; |
2eadc33f AT |
6667 | port->pps_status = 0; |
6668 | port->pps_pending = true; | |
2eadc33f AT |
6669 | mutex_unlock(&port->lock); |
6670 | ||
6671 | if (!wait_for_completion_timeout(&port->pps_complete, | |
6672 | msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) | |
6673 | ret = -ETIMEDOUT; | |
6674 | else | |
6675 | ret = port->pps_status; | |
6676 | ||
6677 | goto swap_unlock; | |
6678 | ||
6679 | port_unlock: | |
6680 | mutex_unlock(&port->lock); | |
6681 | swap_unlock: | |
6682 | mutex_unlock(&port->swap_lock); | |
6683 | ||
6684 | return ret; | |
6685 | } | |
6686 | ||
f2a8aa05 | 6687 | static int tcpm_pps_activate(struct tcpm_port *port, bool activate) |
2eadc33f AT |
6688 | { |
6689 | int ret = 0; | |
6690 | ||
6691 | mutex_lock(&port->swap_lock); | |
6692 | mutex_lock(&port->lock); | |
6693 | ||
6694 | if (!port->pps_data.supported) { | |
6695 | ret = -EOPNOTSUPP; | |
6696 | goto port_unlock; | |
6697 | } | |
6698 | ||
6699 | /* Trying to deactivate PPS when already deactivated so just bail */ | |
6700 | if (!port->pps_data.active && !activate) | |
6701 | goto port_unlock; | |
6702 | ||
6703 | if (port->state != SNK_READY) { | |
6704 | ret = -EAGAIN; | |
6705 | goto port_unlock; | |
6706 | } | |
6707 | ||
0908c5ac KT |
6708 | if (activate) |
6709 | port->upcoming_state = SNK_NEGOTIATE_PPS_CAPABILITIES; | |
6710 | else | |
6711 | port->upcoming_state = SNK_NEGOTIATE_CAPABILITIES; | |
6712 | ret = tcpm_ams_start(port, POWER_NEGOTIATION); | |
6713 | if (ret == -EAGAIN) { | |
6714 | port->upcoming_state = INVALID_STATE; | |
6715 | goto port_unlock; | |
6716 | } | |
6717 | ||
2eadc33f AT |
6718 | reinit_completion(&port->pps_complete); |
6719 | port->pps_status = 0; | |
6720 | port->pps_pending = true; | |
6721 | ||
6722 | /* Trigger PPS request or move back to standard PDO contract */ | |
6723 | if (activate) { | |
e3a07202 BJS |
6724 | port->pps_data.req_out_volt = port->supply_voltage; |
6725 | port->pps_data.req_op_curr = port->current_limit; | |
2eadc33f AT |
6726 | } |
6727 | mutex_unlock(&port->lock); | |
6728 | ||
6729 | if (!wait_for_completion_timeout(&port->pps_complete, | |
6730 | msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) | |
6731 | ret = -ETIMEDOUT; | |
6732 | else | |
6733 | ret = port->pps_status; | |
6734 | ||
6735 | goto swap_unlock; | |
6736 | ||
6737 | port_unlock: | |
6738 | mutex_unlock(&port->lock); | |
6739 | swap_unlock: | |
6740 | mutex_unlock(&port->swap_lock); | |
6741 | ||
6742 | return ret; | |
6743 | } | |
6744 | ||
f0690a25 GR |
6745 | static void tcpm_init(struct tcpm_port *port) |
6746 | { | |
6747 | enum typec_cc_status cc1, cc2; | |
6748 | ||
6749 | port->tcpc->init(port->tcpc); | |
6750 | ||
6751 | tcpm_reset_port(port); | |
6752 | ||
6753 | /* | |
6754 | * XXX | |
6755 | * Should possibly wait for VBUS to settle if it was enabled locally | |
6756 | * since tcpm_reset_port() will disable VBUS. | |
6757 | */ | |
6758 | port->vbus_present = port->tcpc->get_vbus(port->tcpc); | |
6759 | if (port->vbus_present) | |
6760 | port->vbus_never_low = true; | |
6761 | ||
3db4c21c BJS |
6762 | /* |
6763 | * 1. When vbus_present is true, voltage on VBUS is already at VSAFE5V. | |
6764 | * So implicitly vbus_vsafe0v = false. | |
6765 | * | |
6766 | * 2. When vbus_present is false and TCPC does NOT support querying | |
6767 | * vsafe0v status, then, it's best to assume vbus is at VSAFE0V i.e. | |
6768 | * vbus_vsafe0v is true. | |
6769 | * | |
6770 | * 3. When vbus_present is false and TCPC does support querying vsafe0v, | |
6771 | * then, query tcpc for vsafe0v status. | |
6772 | */ | |
6773 | if (port->vbus_present) | |
6774 | port->vbus_vsafe0v = false; | |
6775 | else if (!port->tcpc->is_vbus_vsafe0v) | |
6776 | port->vbus_vsafe0v = true; | |
6777 | else | |
6778 | port->vbus_vsafe0v = port->tcpc->is_vbus_vsafe0v(port->tcpc); | |
6779 | ||
f0690a25 GR |
6780 | tcpm_set_state(port, tcpm_default_state(port), 0); |
6781 | ||
6782 | if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0) | |
6783 | _tcpm_cc_change(port, cc1, cc2); | |
6784 | ||
6785 | /* | |
6786 | * Some adapters need a clean slate at startup, and won't recover | |
6787 | * otherwise. So do not try to be fancy and force a clean disconnect. | |
6788 | */ | |
b17dd571 | 6789 | tcpm_set_state(port, PORT_RESET, 0); |
f0690a25 GR |
6790 | } |
6791 | ||
00ec21e5 | 6792 | static int tcpm_port_type_set(struct typec_port *p, enum typec_port_type type) |
9b0ae699 | 6793 | { |
00ec21e5 | 6794 | struct tcpm_port *port = typec_get_drvdata(p); |
9b0ae699 BJS |
6795 | |
6796 | mutex_lock(&port->lock); | |
6797 | if (type == port->port_type) | |
6798 | goto port_unlock; | |
6799 | ||
6800 | port->port_type = type; | |
6801 | ||
6802 | if (!port->connected) { | |
6803 | tcpm_set_state(port, PORT_RESET, 0); | |
ceeb1625 | 6804 | } else if (type == TYPEC_PORT_SNK) { |
9b0ae699 BJS |
6805 | if (!(port->pwr_role == TYPEC_SINK && |
6806 | port->data_role == TYPEC_DEVICE)) | |
6807 | tcpm_set_state(port, PORT_RESET, 0); | |
ceeb1625 | 6808 | } else if (type == TYPEC_PORT_SRC) { |
9b0ae699 BJS |
6809 | if (!(port->pwr_role == TYPEC_SOURCE && |
6810 | port->data_role == TYPEC_HOST)) | |
6811 | tcpm_set_state(port, PORT_RESET, 0); | |
6812 | } | |
6813 | ||
6814 | port_unlock: | |
6815 | mutex_unlock(&port->lock); | |
6816 | return 0; | |
6817 | } | |
6818 | ||
cd099cde KT |
6819 | static struct pd_data *tcpm_find_pd_data(struct tcpm_port *port, struct usb_power_delivery *pd) |
6820 | { | |
6821 | int i; | |
6822 | ||
6823 | for (i = 0; port->pd_list[i]; i++) { | |
6824 | if (port->pd_list[i]->pd == pd) | |
6825 | return port->pd_list[i]; | |
6826 | } | |
6827 | ||
6828 | return ERR_PTR(-ENODATA); | |
6829 | } | |
6830 | ||
6831 | static struct usb_power_delivery **tcpm_pd_get(struct typec_port *p) | |
6832 | { | |
6833 | struct tcpm_port *port = typec_get_drvdata(p); | |
6834 | ||
6835 | return port->pds; | |
6836 | } | |
6837 | ||
6838 | static int tcpm_pd_set(struct typec_port *p, struct usb_power_delivery *pd) | |
6839 | { | |
6840 | struct tcpm_port *port = typec_get_drvdata(p); | |
6841 | struct pd_data *data; | |
6842 | int i, ret = 0; | |
6843 | ||
6844 | mutex_lock(&port->lock); | |
6845 | ||
6846 | if (port->selected_pd == pd) | |
6847 | goto unlock; | |
6848 | ||
6849 | data = tcpm_find_pd_data(port, pd); | |
6850 | if (IS_ERR(data)) { | |
6851 | ret = PTR_ERR(data); | |
6852 | goto unlock; | |
6853 | } | |
6854 | ||
6855 | if (data->sink_desc.pdo[0]) { | |
6856 | for (i = 0; i < PDO_MAX_OBJECTS && data->sink_desc.pdo[i]; i++) | |
6857 | port->snk_pdo[i] = data->sink_desc.pdo[i]; | |
c4128304 | 6858 | port->nr_snk_pdo = i; |
cd099cde KT |
6859 | port->operating_snk_mw = data->operating_snk_mw; |
6860 | } | |
6861 | ||
6862 | if (data->source_desc.pdo[0]) { | |
6863 | for (i = 0; i < PDO_MAX_OBJECTS && data->source_desc.pdo[i]; i++) | |
893cd946 | 6864 | port->src_pdo[i] = data->source_desc.pdo[i]; |
c4128304 | 6865 | port->nr_src_pdo = i; |
cd099cde KT |
6866 | } |
6867 | ||
6868 | switch (port->state) { | |
6869 | case SRC_UNATTACHED: | |
6870 | case SRC_ATTACH_WAIT: | |
6871 | case SRC_TRYWAIT: | |
6872 | tcpm_set_cc(port, tcpm_rp_cc(port)); | |
6873 | break; | |
6874 | case SRC_SEND_CAPABILITIES: | |
6875 | case SRC_SEND_CAPABILITIES_TIMEOUT: | |
6876 | case SRC_NEGOTIATE_CAPABILITIES: | |
6877 | case SRC_READY: | |
6878 | case SRC_WAIT_NEW_CAPABILITIES: | |
6879 | port->caps_count = 0; | |
6880 | port->upcoming_state = SRC_SEND_CAPABILITIES; | |
6881 | ret = tcpm_ams_start(port, POWER_NEGOTIATION); | |
6882 | if (ret == -EAGAIN) { | |
6883 | port->upcoming_state = INVALID_STATE; | |
6884 | goto unlock; | |
6885 | } | |
6886 | break; | |
6887 | case SNK_NEGOTIATE_CAPABILITIES: | |
6888 | case SNK_NEGOTIATE_PPS_CAPABILITIES: | |
6889 | case SNK_READY: | |
6890 | case SNK_TRANSITION_SINK: | |
6891 | case SNK_TRANSITION_SINK_VBUS: | |
6892 | if (port->pps_data.active) | |
6893 | port->upcoming_state = SNK_NEGOTIATE_PPS_CAPABILITIES; | |
6894 | else if (port->pd_capable) | |
6895 | port->upcoming_state = SNK_NEGOTIATE_CAPABILITIES; | |
6896 | else | |
6897 | break; | |
6898 | ||
6899 | port->update_sink_caps = true; | |
6900 | ||
6901 | ret = tcpm_ams_start(port, POWER_NEGOTIATION); | |
6902 | if (ret == -EAGAIN) { | |
6903 | port->upcoming_state = INVALID_STATE; | |
6904 | goto unlock; | |
6905 | } | |
6906 | break; | |
6907 | default: | |
6908 | break; | |
6909 | } | |
6910 | ||
6911 | port->port_source_caps = data->source_cap; | |
6912 | port->port_sink_caps = data->sink_cap; | |
17af5050 | 6913 | typec_port_set_usb_power_delivery(p, NULL); |
cd099cde | 6914 | port->selected_pd = pd; |
17af5050 | 6915 | typec_port_set_usb_power_delivery(p, port->selected_pd); |
cd099cde KT |
6916 | unlock: |
6917 | mutex_unlock(&port->lock); | |
6918 | return ret; | |
6919 | } | |
6920 | ||
00ec21e5 HK |
6921 | static const struct typec_operations tcpm_ops = { |
6922 | .try_role = tcpm_try_role, | |
6923 | .dr_set = tcpm_dr_set, | |
6924 | .pr_set = tcpm_pr_set, | |
6925 | .vconn_set = tcpm_vconn_set, | |
cd099cde KT |
6926 | .port_type_set = tcpm_port_type_set, |
6927 | .pd_get = tcpm_pd_get, | |
6928 | .pd_set = tcpm_pd_set | |
00ec21e5 HK |
6929 | }; |
6930 | ||
f0690a25 GR |
6931 | void tcpm_tcpc_reset(struct tcpm_port *port) |
6932 | { | |
6933 | mutex_lock(&port->lock); | |
6934 | /* XXX: Maintain PD connection if possible? */ | |
6935 | tcpm_init(port); | |
6936 | mutex_unlock(&port->lock); | |
6937 | } | |
6938 | EXPORT_SYMBOL_GPL(tcpm_tcpc_reset); | |
6939 | ||
8203d269 HK |
6940 | static void tcpm_port_unregister_pd(struct tcpm_port *port) |
6941 | { | |
cd099cde KT |
6942 | int i; |
6943 | ||
8203d269 | 6944 | port->port_sink_caps = NULL; |
8203d269 | 6945 | port->port_source_caps = NULL; |
cd099cde KT |
6946 | for (i = 0; i < port->pd_count; i++) { |
6947 | usb_power_delivery_unregister_capabilities(port->pd_list[i]->sink_cap); | |
cd099cde | 6948 | usb_power_delivery_unregister_capabilities(port->pd_list[i]->source_cap); |
cd099cde KT |
6949 | devm_kfree(port->dev, port->pd_list[i]); |
6950 | port->pd_list[i] = NULL; | |
6951 | usb_power_delivery_unregister(port->pds[i]); | |
6952 | port->pds[i] = NULL; | |
6953 | } | |
8203d269 HK |
6954 | } |
6955 | ||
6956 | static int tcpm_port_register_pd(struct tcpm_port *port) | |
6957 | { | |
6958 | struct usb_power_delivery_desc desc = { port->typec_caps.pd_revision }; | |
8203d269 | 6959 | struct usb_power_delivery_capabilities *cap; |
cd099cde | 6960 | int ret, i; |
8203d269 HK |
6961 | |
6962 | if (!port->nr_src_pdo && !port->nr_snk_pdo) | |
6963 | return 0; | |
6964 | ||
cd099cde KT |
6965 | for (i = 0; i < port->pd_count; i++) { |
6966 | port->pds[i] = usb_power_delivery_register(port->dev, &desc); | |
6967 | if (IS_ERR(port->pds[i])) { | |
6968 | ret = PTR_ERR(port->pds[i]); | |
8203d269 HK |
6969 | goto err_unregister; |
6970 | } | |
cd099cde KT |
6971 | port->pd_list[i]->pd = port->pds[i]; |
6972 | ||
6973 | if (port->pd_list[i]->source_desc.pdo[0]) { | |
6974 | cap = usb_power_delivery_register_capabilities(port->pds[i], | |
6975 | &port->pd_list[i]->source_desc); | |
6976 | if (IS_ERR(cap)) { | |
6977 | ret = PTR_ERR(cap); | |
6978 | goto err_unregister; | |
6979 | } | |
6980 | port->pd_list[i]->source_cap = cap; | |
8203d269 HK |
6981 | } |
6982 | ||
cd099cde KT |
6983 | if (port->pd_list[i]->sink_desc.pdo[0]) { |
6984 | cap = usb_power_delivery_register_capabilities(port->pds[i], | |
6985 | &port->pd_list[i]->sink_desc); | |
6986 | if (IS_ERR(cap)) { | |
6987 | ret = PTR_ERR(cap); | |
6988 | goto err_unregister; | |
6989 | } | |
6990 | port->pd_list[i]->sink_cap = cap; | |
6991 | } | |
8203d269 HK |
6992 | } |
6993 | ||
cd099cde KT |
6994 | port->port_source_caps = port->pd_list[0]->source_cap; |
6995 | port->port_sink_caps = port->pd_list[0]->sink_cap; | |
6996 | port->selected_pd = port->pds[0]; | |
8203d269 HK |
6997 | return 0; |
6998 | ||
6999 | err_unregister: | |
7000 | tcpm_port_unregister_pd(port); | |
7001 | ||
7002 | return ret; | |
7003 | } | |
7004 | ||
cd099cde | 7005 | static int tcpm_fw_get_caps(struct tcpm_port *port, struct fwnode_handle *fwnode) |
96232cbc | 7006 | { |
cd099cde KT |
7007 | struct fwnode_handle *capabilities, *child, *caps = NULL; |
7008 | unsigned int nr_src_pdo, nr_snk_pdo; | |
e9e6e164 | 7009 | const char *opmode_str; |
cd099cde KT |
7010 | u32 *src_pdo, *snk_pdo; |
7011 | u32 uw, frs_current; | |
7012 | int ret = 0, i; | |
e9158c7e | 7013 | int mode; |
96232cbc LJ |
7014 | |
7015 | if (!fwnode) | |
7016 | return -EINVAL; | |
7017 | ||
28ec344b SK |
7018 | /* |
7019 | * This fwnode has a "compatible" property, but is never populated as a | |
7020 | * struct device. Instead we simply parse it to read the properties. | |
7021 | * This it breaks fw_devlink=on. To maintain backward compatibility | |
7022 | * with existing DT files, we work around this by deleting any | |
7023 | * fwnode_links to/from this fwnode. | |
7024 | */ | |
7025 | fw_devlink_purge_absent_suppliers(fwnode); | |
7026 | ||
2e7dfb0e | 7027 | ret = typec_get_fw_cap(&port->typec_caps, fwnode); |
96232cbc LJ |
7028 | if (ret < 0) |
7029 | return ret; | |
7030 | ||
e9158c7e DB |
7031 | mode = 0; |
7032 | ||
7033 | if (fwnode_property_read_bool(fwnode, "accessory-mode-audio")) | |
7034 | port->typec_caps.accessory[mode++] = TYPEC_ACCESSORY_AUDIO; | |
7035 | ||
7036 | if (fwnode_property_read_bool(fwnode, "accessory-mode-debug")) | |
7037 | port->typec_caps.accessory[mode++] = TYPEC_ACCESSORY_DEBUG; | |
7038 | ||
96232cbc | 7039 | port->port_type = port->typec_caps.type; |
e9e6e164 | 7040 | port->pd_supported = !fwnode_property_read_bool(fwnode, "pd-disable"); |
1373fefc | 7041 | port->slow_charger_loop = fwnode_property_read_bool(fwnode, "slow-charger-loop"); |
cd099cde | 7042 | port->self_powered = fwnode_property_read_bool(fwnode, "self-powered"); |
96232cbc | 7043 | |
cd099cde | 7044 | if (!port->pd_supported) { |
e9e6e164 KT |
7045 | ret = fwnode_property_read_string(fwnode, "typec-power-opmode", &opmode_str); |
7046 | if (ret) | |
7047 | return ret; | |
7048 | ret = typec_find_pwr_opmode(opmode_str); | |
7049 | if (ret < 0) | |
7050 | return ret; | |
7051 | port->src_rp = tcpm_pwr_opmode_to_rp(ret); | |
e9e6e164 | 7052 | return 0; |
cd099cde | 7053 | } |
e9e6e164 | 7054 | |
cd099cde | 7055 | /* The following code are applicable to pd-capable ports, i.e. pd_supported is true. */ |
96232cbc | 7056 | |
e9e6e164 | 7057 | /* FRS can only be supported by DRP ports */ |
8dc4bd07 | 7058 | if (port->port_type == TYPEC_PORT_DRP) { |
8115240c BJS |
7059 | ret = fwnode_property_read_u32(fwnode, "new-source-frs-typec-current", |
7060 | &frs_current); | |
cd099cde | 7061 | if (!ret && frs_current <= FRS_5V_3A) |
8115240c | 7062 | port->new_source_frs_current = frs_current; |
cd099cde KT |
7063 | |
7064 | if (ret) | |
7065 | ret = 0; | |
8dc4bd07 BJS |
7066 | } |
7067 | ||
cd099cde KT |
7068 | /* For the backward compatibility, "capabilities" node is optional. */ |
7069 | capabilities = fwnode_get_named_child_node(fwnode, "capabilities"); | |
7070 | if (!capabilities) { | |
7071 | port->pd_count = 1; | |
7072 | } else { | |
7073 | fwnode_for_each_child_node(capabilities, child) | |
7074 | port->pd_count++; | |
7075 | ||
7076 | if (!port->pd_count) { | |
7077 | ret = -ENODATA; | |
7078 | goto put_capabilities; | |
7079 | } | |
7080 | } | |
7081 | ||
7082 | port->pds = devm_kcalloc(port->dev, port->pd_count, sizeof(struct usb_power_delivery *), | |
7083 | GFP_KERNEL); | |
7084 | if (!port->pds) { | |
7085 | ret = -ENOMEM; | |
7086 | goto put_capabilities; | |
7087 | } | |
7088 | ||
7089 | port->pd_list = devm_kcalloc(port->dev, port->pd_count, sizeof(struct pd_data *), | |
7090 | GFP_KERNEL); | |
7091 | if (!port->pd_list) { | |
7092 | ret = -ENOMEM; | |
7093 | goto put_capabilities; | |
7094 | } | |
7095 | ||
7096 | for (i = 0; i < port->pd_count; i++) { | |
7097 | port->pd_list[i] = devm_kzalloc(port->dev, sizeof(struct pd_data), GFP_KERNEL); | |
7098 | if (!port->pd_list[i]) { | |
7099 | ret = -ENOMEM; | |
7100 | goto put_capabilities; | |
7101 | } | |
7102 | ||
7103 | src_pdo = port->pd_list[i]->source_desc.pdo; | |
7104 | port->pd_list[i]->source_desc.role = TYPEC_SOURCE; | |
7105 | snk_pdo = port->pd_list[i]->sink_desc.pdo; | |
7106 | port->pd_list[i]->sink_desc.role = TYPEC_SINK; | |
7107 | ||
7108 | /* If "capabilities" is NULL, fall back to single pd cap population. */ | |
7109 | if (!capabilities) | |
7110 | caps = fwnode; | |
7111 | else | |
7112 | caps = fwnode_get_next_child_node(capabilities, caps); | |
7113 | ||
7114 | if (port->port_type != TYPEC_PORT_SNK) { | |
7115 | ret = fwnode_property_count_u32(caps, "source-pdos"); | |
7116 | if (ret == 0) { | |
7117 | ret = -EINVAL; | |
7118 | goto put_caps; | |
7119 | } | |
7120 | if (ret < 0) | |
7121 | goto put_caps; | |
7122 | ||
7123 | nr_src_pdo = min(ret, PDO_MAX_OBJECTS); | |
7124 | ret = fwnode_property_read_u32_array(caps, "source-pdos", src_pdo, | |
7125 | nr_src_pdo); | |
7126 | if (ret) | |
7127 | goto put_caps; | |
7128 | ||
7129 | ret = tcpm_validate_caps(port, src_pdo, nr_src_pdo); | |
7130 | if (ret) | |
7131 | goto put_caps; | |
7132 | ||
7133 | if (i == 0) { | |
7134 | port->nr_src_pdo = nr_src_pdo; | |
7135 | memcpy_and_pad(port->src_pdo, sizeof(u32) * PDO_MAX_OBJECTS, | |
7136 | port->pd_list[0]->source_desc.pdo, | |
7137 | sizeof(u32) * nr_src_pdo, | |
7138 | 0); | |
7139 | } | |
7140 | } | |
7141 | ||
7142 | if (port->port_type != TYPEC_PORT_SRC) { | |
7143 | ret = fwnode_property_count_u32(caps, "sink-pdos"); | |
7144 | if (ret == 0) { | |
7145 | ret = -EINVAL; | |
7146 | goto put_caps; | |
7147 | } | |
7148 | ||
7149 | if (ret < 0) | |
7150 | goto put_caps; | |
7151 | ||
7152 | nr_snk_pdo = min(ret, PDO_MAX_OBJECTS); | |
7153 | ret = fwnode_property_read_u32_array(caps, "sink-pdos", snk_pdo, | |
7154 | nr_snk_pdo); | |
7155 | if (ret) | |
7156 | goto put_caps; | |
7157 | ||
7158 | ret = tcpm_validate_caps(port, snk_pdo, nr_snk_pdo); | |
7159 | if (ret) | |
7160 | goto put_caps; | |
7161 | ||
7162 | if (fwnode_property_read_u32(caps, "op-sink-microwatt", &uw) < 0) { | |
7163 | ret = -EINVAL; | |
7164 | goto put_caps; | |
7165 | } | |
7166 | ||
7167 | port->pd_list[i]->operating_snk_mw = uw / 1000; | |
7168 | ||
7169 | if (i == 0) { | |
7170 | port->nr_snk_pdo = nr_snk_pdo; | |
7171 | memcpy_and_pad(port->snk_pdo, sizeof(u32) * PDO_MAX_OBJECTS, | |
7172 | port->pd_list[0]->sink_desc.pdo, | |
7173 | sizeof(u32) * nr_snk_pdo, | |
7174 | 0); | |
7175 | port->operating_snk_mw = port->pd_list[0]->operating_snk_mw; | |
7176 | } | |
7177 | } | |
7178 | } | |
7179 | ||
7180 | put_caps: | |
7181 | if (caps != fwnode) | |
7182 | fwnode_handle_put(caps); | |
7183 | put_capabilities: | |
7184 | fwnode_handle_put(capabilities); | |
7185 | return ret; | |
7186 | } | |
7187 | ||
7188 | static int tcpm_fw_get_snk_vdos(struct tcpm_port *port, struct fwnode_handle *fwnode) | |
7189 | { | |
7190 | int ret; | |
7191 | ||
f5d1d63e KT |
7192 | /* sink-vdos is optional */ |
7193 | ret = fwnode_property_count_u32(fwnode, "sink-vdos"); | |
7194 | if (ret < 0) | |
cd099cde | 7195 | return 0; |
f5d1d63e KT |
7196 | |
7197 | port->nr_snk_vdo = min(ret, VDO_MAX_OBJECTS); | |
7198 | if (port->nr_snk_vdo) { | |
7199 | ret = fwnode_property_read_u32_array(fwnode, "sink-vdos", | |
7200 | port->snk_vdo, | |
7201 | port->nr_snk_vdo); | |
7202 | if (ret < 0) | |
7203 | return ret; | |
7204 | } | |
7205 | ||
7ac50510 KT |
7206 | /* If sink-vdos is found, sink-vdos-v1 is expected for backward compatibility. */ |
7207 | if (port->nr_snk_vdo) { | |
7208 | ret = fwnode_property_count_u32(fwnode, "sink-vdos-v1"); | |
7209 | if (ret < 0) | |
7210 | return ret; | |
7211 | else if (ret == 0) | |
7212 | return -ENODATA; | |
7213 | ||
7214 | port->nr_snk_vdo_v1 = min(ret, VDO_MAX_OBJECTS); | |
7215 | ret = fwnode_property_read_u32_array(fwnode, "sink-vdos-v1", | |
7216 | port->snk_vdo_v1, | |
7217 | port->nr_snk_vdo_v1); | |
7218 | if (ret < 0) | |
7219 | return ret; | |
7220 | } | |
f5d1d63e | 7221 | |
96232cbc LJ |
7222 | return 0; |
7223 | } | |
7224 | ||
f2a8aa05 AT |
7225 | /* Power Supply access to expose source power information */ |
7226 | enum tcpm_psy_online_states { | |
7227 | TCPM_PSY_OFFLINE = 0, | |
7228 | TCPM_PSY_FIXED_ONLINE, | |
7229 | TCPM_PSY_PROG_ONLINE, | |
7230 | }; | |
7231 | ||
7232 | static enum power_supply_property tcpm_psy_props[] = { | |
7233 | POWER_SUPPLY_PROP_USB_TYPE, | |
7234 | POWER_SUPPLY_PROP_ONLINE, | |
7235 | POWER_SUPPLY_PROP_VOLTAGE_MIN, | |
7236 | POWER_SUPPLY_PROP_VOLTAGE_MAX, | |
7237 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7238 | POWER_SUPPLY_PROP_CURRENT_MAX, | |
7239 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
7240 | }; | |
7241 | ||
7242 | static int tcpm_psy_get_online(struct tcpm_port *port, | |
7243 | union power_supply_propval *val) | |
7244 | { | |
7245 | if (port->vbus_charge) { | |
7246 | if (port->pps_data.active) | |
7247 | val->intval = TCPM_PSY_PROG_ONLINE; | |
7248 | else | |
7249 | val->intval = TCPM_PSY_FIXED_ONLINE; | |
7250 | } else { | |
7251 | val->intval = TCPM_PSY_OFFLINE; | |
7252 | } | |
7253 | ||
7254 | return 0; | |
7255 | } | |
7256 | ||
7257 | static int tcpm_psy_get_voltage_min(struct tcpm_port *port, | |
7258 | union power_supply_propval *val) | |
7259 | { | |
7260 | if (port->pps_data.active) | |
7261 | val->intval = port->pps_data.min_volt * 1000; | |
7262 | else | |
7263 | val->intval = port->supply_voltage * 1000; | |
7264 | ||
7265 | return 0; | |
7266 | } | |
7267 | ||
7268 | static int tcpm_psy_get_voltage_max(struct tcpm_port *port, | |
7269 | union power_supply_propval *val) | |
7270 | { | |
7271 | if (port->pps_data.active) | |
7272 | val->intval = port->pps_data.max_volt * 1000; | |
7273 | else | |
7274 | val->intval = port->supply_voltage * 1000; | |
7275 | ||
7276 | return 0; | |
7277 | } | |
7278 | ||
7279 | static int tcpm_psy_get_voltage_now(struct tcpm_port *port, | |
7280 | union power_supply_propval *val) | |
7281 | { | |
7282 | val->intval = port->supply_voltage * 1000; | |
7283 | ||
7284 | return 0; | |
7285 | } | |
7286 | ||
7287 | static int tcpm_psy_get_current_max(struct tcpm_port *port, | |
7288 | union power_supply_propval *val) | |
7289 | { | |
7290 | if (port->pps_data.active) | |
7291 | val->intval = port->pps_data.max_curr * 1000; | |
7292 | else | |
7293 | val->intval = port->current_limit * 1000; | |
7294 | ||
7295 | return 0; | |
7296 | } | |
7297 | ||
7298 | static int tcpm_psy_get_current_now(struct tcpm_port *port, | |
7299 | union power_supply_propval *val) | |
7300 | { | |
7301 | val->intval = port->current_limit * 1000; | |
7302 | ||
7303 | return 0; | |
7304 | } | |
7305 | ||
8be558dc FW |
7306 | static int tcpm_psy_get_input_power_limit(struct tcpm_port *port, |
7307 | union power_supply_propval *val) | |
7308 | { | |
7309 | unsigned int src_mv, src_ma, max_src_uw = 0; | |
7310 | unsigned int i, tmp; | |
7311 | ||
7312 | for (i = 0; i < port->nr_source_caps; i++) { | |
7313 | u32 pdo = port->source_caps[i]; | |
7314 | ||
7315 | if (pdo_type(pdo) == PDO_TYPE_FIXED) { | |
7316 | src_mv = pdo_fixed_voltage(pdo); | |
7317 | src_ma = pdo_max_current(pdo); | |
7318 | tmp = src_mv * src_ma; | |
7319 | max_src_uw = tmp > max_src_uw ? tmp : max_src_uw; | |
7320 | } | |
7321 | } | |
7322 | ||
7323 | val->intval = max_src_uw; | |
7324 | return 0; | |
7325 | } | |
7326 | ||
f2a8aa05 AT |
7327 | static int tcpm_psy_get_prop(struct power_supply *psy, |
7328 | enum power_supply_property psp, | |
7329 | union power_supply_propval *val) | |
7330 | { | |
7331 | struct tcpm_port *port = power_supply_get_drvdata(psy); | |
7332 | int ret = 0; | |
7333 | ||
7334 | switch (psp) { | |
7335 | case POWER_SUPPLY_PROP_USB_TYPE: | |
7336 | val->intval = port->usb_type; | |
7337 | break; | |
7338 | case POWER_SUPPLY_PROP_ONLINE: | |
7339 | ret = tcpm_psy_get_online(port, val); | |
7340 | break; | |
7341 | case POWER_SUPPLY_PROP_VOLTAGE_MIN: | |
7342 | ret = tcpm_psy_get_voltage_min(port, val); | |
7343 | break; | |
7344 | case POWER_SUPPLY_PROP_VOLTAGE_MAX: | |
7345 | ret = tcpm_psy_get_voltage_max(port, val); | |
7346 | break; | |
7347 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
7348 | ret = tcpm_psy_get_voltage_now(port, val); | |
7349 | break; | |
7350 | case POWER_SUPPLY_PROP_CURRENT_MAX: | |
7351 | ret = tcpm_psy_get_current_max(port, val); | |
7352 | break; | |
7353 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7354 | ret = tcpm_psy_get_current_now(port, val); | |
7355 | break; | |
8be558dc FW |
7356 | case POWER_SUPPLY_PROP_INPUT_POWER_LIMIT: |
7357 | tcpm_psy_get_input_power_limit(port, val); | |
7358 | break; | |
f2a8aa05 AT |
7359 | default: |
7360 | ret = -EINVAL; | |
7361 | break; | |
7362 | } | |
7363 | ||
7364 | return ret; | |
7365 | } | |
7366 | ||
7367 | static int tcpm_psy_set_online(struct tcpm_port *port, | |
7368 | const union power_supply_propval *val) | |
7369 | { | |
7370 | int ret; | |
7371 | ||
7372 | switch (val->intval) { | |
7373 | case TCPM_PSY_FIXED_ONLINE: | |
7374 | ret = tcpm_pps_activate(port, false); | |
7375 | break; | |
7376 | case TCPM_PSY_PROG_ONLINE: | |
7377 | ret = tcpm_pps_activate(port, true); | |
7378 | break; | |
7379 | default: | |
7380 | ret = -EINVAL; | |
7381 | break; | |
7382 | } | |
7383 | ||
7384 | return ret; | |
7385 | } | |
7386 | ||
7387 | static int tcpm_psy_set_prop(struct power_supply *psy, | |
7388 | enum power_supply_property psp, | |
7389 | const union power_supply_propval *val) | |
7390 | { | |
7391 | struct tcpm_port *port = power_supply_get_drvdata(psy); | |
7392 | int ret; | |
7393 | ||
f2d38edc BJS |
7394 | /* |
7395 | * All the properties below are related to USB PD. The check needs to be | |
7396 | * property specific when a non-pd related property is added. | |
7397 | */ | |
7398 | if (!port->pd_supported) | |
7399 | return -EOPNOTSUPP; | |
7400 | ||
f2a8aa05 AT |
7401 | switch (psp) { |
7402 | case POWER_SUPPLY_PROP_ONLINE: | |
7403 | ret = tcpm_psy_set_online(port, val); | |
7404 | break; | |
7405 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
40f362ff | 7406 | ret = tcpm_pps_set_out_volt(port, val->intval / 1000); |
f2a8aa05 AT |
7407 | break; |
7408 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7409 | if (val->intval > port->pps_data.max_curr * 1000) | |
7410 | ret = -EINVAL; | |
7411 | else | |
7412 | ret = tcpm_pps_set_op_curr(port, val->intval / 1000); | |
7413 | break; | |
7414 | default: | |
7415 | ret = -EINVAL; | |
7416 | break; | |
7417 | } | |
86629e09 | 7418 | power_supply_changed(port->psy); |
f2a8aa05 AT |
7419 | return ret; |
7420 | } | |
7421 | ||
7422 | static int tcpm_psy_prop_writeable(struct power_supply *psy, | |
7423 | enum power_supply_property psp) | |
7424 | { | |
7425 | switch (psp) { | |
7426 | case POWER_SUPPLY_PROP_ONLINE: | |
7427 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
7428 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7429 | return 1; | |
7430 | default: | |
7431 | return 0; | |
7432 | } | |
7433 | } | |
7434 | ||
7435 | static enum power_supply_usb_type tcpm_psy_usb_types[] = { | |
7436 | POWER_SUPPLY_USB_TYPE_C, | |
7437 | POWER_SUPPLY_USB_TYPE_PD, | |
7438 | POWER_SUPPLY_USB_TYPE_PD_PPS, | |
7439 | }; | |
7440 | ||
7441 | static const char *tcpm_psy_name_prefix = "tcpm-source-psy-"; | |
7442 | ||
7443 | static int devm_tcpm_psy_register(struct tcpm_port *port) | |
7444 | { | |
7445 | struct power_supply_config psy_cfg = {}; | |
7446 | const char *port_dev_name = dev_name(port->dev); | |
7447 | size_t psy_name_len = strlen(tcpm_psy_name_prefix) + | |
7448 | strlen(port_dev_name) + 1; | |
7449 | char *psy_name; | |
7450 | ||
7451 | psy_cfg.drv_data = port; | |
c97a8cc1 | 7452 | psy_cfg.fwnode = dev_fwnode(port->dev); |
f2a8aa05 AT |
7453 | psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL); |
7454 | if (!psy_name) | |
7455 | return -ENOMEM; | |
7456 | ||
7457 | snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix, | |
7458 | port_dev_name); | |
7459 | port->psy_desc.name = psy_name; | |
b5206275 | 7460 | port->psy_desc.type = POWER_SUPPLY_TYPE_USB; |
f2a8aa05 AT |
7461 | port->psy_desc.usb_types = tcpm_psy_usb_types; |
7462 | port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types); | |
b5206275 ZY |
7463 | port->psy_desc.properties = tcpm_psy_props; |
7464 | port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props); | |
7465 | port->psy_desc.get_property = tcpm_psy_get_prop; | |
7466 | port->psy_desc.set_property = tcpm_psy_set_prop; | |
7467 | port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable; | |
f2a8aa05 AT |
7468 | |
7469 | port->usb_type = POWER_SUPPLY_USB_TYPE_C; | |
7470 | ||
7471 | port->psy = devm_power_supply_register(port->dev, &port->psy_desc, | |
7472 | &psy_cfg); | |
7473 | ||
7474 | return PTR_ERR_OR_ZERO(port->psy); | |
7475 | } | |
7476 | ||
3ed8e1c2 BJS |
7477 | static enum hrtimer_restart state_machine_timer_handler(struct hrtimer *timer) |
7478 | { | |
7479 | struct tcpm_port *port = container_of(timer, struct tcpm_port, state_machine_timer); | |
7480 | ||
ca4d8344 XY |
7481 | if (port->registered) |
7482 | kthread_queue_work(port->wq, &port->state_machine); | |
3ed8e1c2 BJS |
7483 | return HRTIMER_NORESTART; |
7484 | } | |
7485 | ||
7486 | static enum hrtimer_restart vdm_state_machine_timer_handler(struct hrtimer *timer) | |
7487 | { | |
7488 | struct tcpm_port *port = container_of(timer, struct tcpm_port, vdm_state_machine_timer); | |
7489 | ||
ca4d8344 XY |
7490 | if (port->registered) |
7491 | kthread_queue_work(port->wq, &port->vdm_state_machine); | |
3ed8e1c2 BJS |
7492 | return HRTIMER_NORESTART; |
7493 | } | |
7494 | ||
8dc4bd07 BJS |
7495 | static enum hrtimer_restart enable_frs_timer_handler(struct hrtimer *timer) |
7496 | { | |
7497 | struct tcpm_port *port = container_of(timer, struct tcpm_port, enable_frs_timer); | |
7498 | ||
ca4d8344 XY |
7499 | if (port->registered) |
7500 | kthread_queue_work(port->wq, &port->enable_frs); | |
8dc4bd07 BJS |
7501 | return HRTIMER_NORESTART; |
7502 | } | |
7503 | ||
c34e85fa KT |
7504 | static enum hrtimer_restart send_discover_timer_handler(struct hrtimer *timer) |
7505 | { | |
7506 | struct tcpm_port *port = container_of(timer, struct tcpm_port, send_discover_timer); | |
7507 | ||
ca4d8344 XY |
7508 | if (port->registered) |
7509 | kthread_queue_work(port->wq, &port->send_discover_work); | |
c34e85fa KT |
7510 | return HRTIMER_NORESTART; |
7511 | } | |
7512 | ||
f0690a25 GR |
7513 | struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc) |
7514 | { | |
7515 | struct tcpm_port *port; | |
a079973f | 7516 | int err; |
f0690a25 | 7517 | |
96232cbc | 7518 | if (!dev || !tcpc || |
f0690a25 GR |
7519 | !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc || |
7520 | !tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus || | |
7521 | !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit) | |
7522 | return ERR_PTR(-EINVAL); | |
7523 | ||
7524 | port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); | |
7525 | if (!port) | |
7526 | return ERR_PTR(-ENOMEM); | |
7527 | ||
7528 | port->dev = dev; | |
7529 | port->tcpc = tcpc; | |
7530 | ||
7531 | mutex_init(&port->lock); | |
7532 | mutex_init(&port->swap_lock); | |
7533 | ||
3ed8e1c2 BJS |
7534 | port->wq = kthread_create_worker(0, dev_name(dev)); |
7535 | if (IS_ERR(port->wq)) | |
7536 | return ERR_CAST(port->wq); | |
7537 | sched_set_fifo(port->wq->task); | |
7538 | ||
7539 | kthread_init_work(&port->state_machine, tcpm_state_machine_work); | |
7540 | kthread_init_work(&port->vdm_state_machine, vdm_state_machine_work); | |
7541 | kthread_init_work(&port->event_work, tcpm_pd_event_handler); | |
8dc4bd07 | 7542 | kthread_init_work(&port->enable_frs, tcpm_enable_frs_work); |
c34e85fa | 7543 | kthread_init_work(&port->send_discover_work, tcpm_send_discover_work); |
3ed8e1c2 BJS |
7544 | hrtimer_init(&port->state_machine_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
7545 | port->state_machine_timer.function = state_machine_timer_handler; | |
7546 | hrtimer_init(&port->vdm_state_machine_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); | |
7547 | port->vdm_state_machine_timer.function = vdm_state_machine_timer_handler; | |
8dc4bd07 BJS |
7548 | hrtimer_init(&port->enable_frs_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
7549 | port->enable_frs_timer.function = enable_frs_timer_handler; | |
c34e85fa KT |
7550 | hrtimer_init(&port->send_discover_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
7551 | port->send_discover_timer.function = send_discover_timer_handler; | |
f0690a25 GR |
7552 | |
7553 | spin_lock_init(&port->pd_event_lock); | |
7554 | ||
7555 | init_completion(&port->tx_complete); | |
7556 | init_completion(&port->swap_complete); | |
2eadc33f | 7557 | init_completion(&port->pps_complete); |
5007e1b5 | 7558 | tcpm_debugfs_init(port); |
f0690a25 | 7559 | |
96232cbc | 7560 | err = tcpm_fw_get_caps(port, tcpc->fwnode); |
cd099cde KT |
7561 | if (err < 0) |
7562 | goto out_destroy_wq; | |
7563 | err = tcpm_fw_get_snk_vdos(port, tcpc->fwnode); | |
96232cbc | 7564 | if (err < 0) |
5007e1b5 | 7565 | goto out_destroy_wq; |
96232cbc | 7566 | |
a079973f | 7567 | port->try_role = port->typec_caps.prefer_role; |
f0690a25 | 7568 | |
f0690a25 | 7569 | port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */ |
2eadc33f | 7570 | port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */ |
5e1d4c49 | 7571 | port->typec_caps.svdm_version = SVDM_VER_2_0; |
00ec21e5 HK |
7572 | port->typec_caps.driver_data = port; |
7573 | port->typec_caps.ops = &tcpm_ops; | |
75f81a7f | 7574 | port->typec_caps.orientation_aware = 1; |
f0690a25 GR |
7575 | |
7576 | port->partner_desc.identity = &port->partner_ident; | |
f0690a25 | 7577 | |
2000016c | 7578 | port->role_sw = usb_role_switch_get(port->dev); |
d56de8c9 LJ |
7579 | if (!port->role_sw) |
7580 | port->role_sw = fwnode_usb_role_switch_get(tcpc->fwnode); | |
2000016c HG |
7581 | if (IS_ERR(port->role_sw)) { |
7582 | err = PTR_ERR(port->role_sw); | |
7583 | goto out_destroy_wq; | |
7584 | } | |
7585 | ||
f2a8aa05 AT |
7586 | err = devm_tcpm_psy_register(port); |
7587 | if (err) | |
9997ab35 | 7588 | goto out_role_sw_put; |
86629e09 | 7589 | power_supply_changed(port->psy); |
f2a8aa05 | 7590 | |
8203d269 HK |
7591 | err = tcpm_port_register_pd(port); |
7592 | if (err) | |
7593 | goto out_role_sw_put; | |
7594 | ||
f2e5d3de DB |
7595 | if (port->pds) |
7596 | port->typec_caps.pd = port->pds[0]; | |
8203d269 | 7597 | |
f0690a25 | 7598 | port->typec_port = typec_register_port(port->dev, &port->typec_caps); |
cf6e06cd HK |
7599 | if (IS_ERR(port->typec_port)) { |
7600 | err = PTR_ERR(port->typec_port); | |
8203d269 | 7601 | goto out_unregister_pd; |
f0690a25 GR |
7602 | } |
7603 | ||
55d8b347 HG |
7604 | typec_port_register_altmodes(port->typec_port, |
7605 | &tcpm_altmode_ops, port, | |
7606 | port->port_altmode, ALTMODE_DISCOVERY_MAX); | |
7e7877c5 RB |
7607 | typec_port_register_cable_ops(port->port_altmode, ARRAY_SIZE(port->port_altmode), |
7608 | &tcpm_cable_ops); | |
ca4d8344 | 7609 | port->registered = true; |
55d8b347 | 7610 | |
f0690a25 GR |
7611 | mutex_lock(&port->lock); |
7612 | tcpm_init(port); | |
7613 | mutex_unlock(&port->lock); | |
7614 | ||
7615 | tcpm_log(port, "%s: registered", dev_name(dev)); | |
7616 | return port; | |
7617 | ||
8203d269 HK |
7618 | out_unregister_pd: |
7619 | tcpm_port_unregister_pd(port); | |
9997ab35 | 7620 | out_role_sw_put: |
2000016c | 7621 | usb_role_switch_put(port->role_sw); |
9997ab35 JL |
7622 | out_destroy_wq: |
7623 | tcpm_debugfs_exit(port); | |
3ed8e1c2 | 7624 | kthread_destroy_worker(port->wq); |
f0690a25 GR |
7625 | return ERR_PTR(err); |
7626 | } | |
7627 | EXPORT_SYMBOL_GPL(tcpm_register_port); | |
7628 | ||
7629 | void tcpm_unregister_port(struct tcpm_port *port) | |
7630 | { | |
7631 | int i; | |
7632 | ||
ca4d8344 XY |
7633 | port->registered = false; |
7634 | kthread_destroy_worker(port->wq); | |
7635 | ||
024236ab | 7636 | hrtimer_cancel(&port->send_discover_timer); |
7ade4805 | 7637 | hrtimer_cancel(&port->enable_frs_timer); |
3a13ff7e LJ |
7638 | hrtimer_cancel(&port->vdm_state_machine_timer); |
7639 | hrtimer_cancel(&port->state_machine_timer); | |
7640 | ||
a6d5d230 | 7641 | tcpm_reset_port(port); |
8203d269 HK |
7642 | |
7643 | tcpm_port_unregister_pd(port); | |
7644 | ||
f0690a25 GR |
7645 | for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++) |
7646 | typec_unregister_altmode(port->port_altmode[i]); | |
7647 | typec_unregister_port(port->typec_port); | |
5671a460 | 7648 | usb_role_switch_put(port->role_sw); |
f0690a25 | 7649 | tcpm_debugfs_exit(port); |
f0690a25 GR |
7650 | } |
7651 | EXPORT_SYMBOL_GPL(tcpm_unregister_port); | |
7652 | ||
7653 | MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>"); | |
7654 | MODULE_DESCRIPTION("USB Type-C Port Manager"); | |
7655 | MODULE_LICENSE("GPL"); |