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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> | |
02d5be46 | 11 | #include <linux/jiffies.h> |
f0690a25 GR |
12 | #include <linux/kernel.h> |
13 | #include <linux/module.h> | |
14 | #include <linux/mutex.h> | |
f2a8aa05 | 15 | #include <linux/power_supply.h> |
f0690a25 | 16 | #include <linux/proc_fs.h> |
c97a8cc1 | 17 | #include <linux/property.h> |
f0690a25 GR |
18 | #include <linux/sched/clock.h> |
19 | #include <linux/seq_file.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/spinlock.h> | |
4b4e02c8 | 22 | #include <linux/usb/pd.h> |
64f7c494 | 23 | #include <linux/usb/pd_ado.h> |
4b4e02c8 | 24 | #include <linux/usb/pd_bdo.h> |
64f7c494 | 25 | #include <linux/usb/pd_ext_sdb.h> |
4b4e02c8 | 26 | #include <linux/usb/pd_vdo.h> |
2000016c | 27 | #include <linux/usb/role.h> |
4b4e02c8 | 28 | #include <linux/usb/tcpm.h> |
e9576fe8 | 29 | #include <linux/usb/typec_altmode.h> |
f0690a25 GR |
30 | #include <linux/workqueue.h> |
31 | ||
f0690a25 GR |
32 | #define FOREACH_STATE(S) \ |
33 | S(INVALID_STATE), \ | |
7893f9e1 | 34 | S(TOGGLING), \ |
f0690a25 GR |
35 | S(SRC_UNATTACHED), \ |
36 | S(SRC_ATTACH_WAIT), \ | |
37 | S(SRC_ATTACHED), \ | |
38 | S(SRC_STARTUP), \ | |
39 | S(SRC_SEND_CAPABILITIES), \ | |
976daf9d | 40 | S(SRC_SEND_CAPABILITIES_TIMEOUT), \ |
f0690a25 GR |
41 | S(SRC_NEGOTIATE_CAPABILITIES), \ |
42 | S(SRC_TRANSITION_SUPPLY), \ | |
43 | S(SRC_READY), \ | |
44 | S(SRC_WAIT_NEW_CAPABILITIES), \ | |
45 | \ | |
46 | S(SNK_UNATTACHED), \ | |
47 | S(SNK_ATTACH_WAIT), \ | |
48 | S(SNK_DEBOUNCED), \ | |
49 | S(SNK_ATTACHED), \ | |
50 | S(SNK_STARTUP), \ | |
51 | S(SNK_DISCOVERY), \ | |
52 | S(SNK_DISCOVERY_DEBOUNCE), \ | |
53 | S(SNK_DISCOVERY_DEBOUNCE_DONE), \ | |
54 | S(SNK_WAIT_CAPABILITIES), \ | |
55 | S(SNK_NEGOTIATE_CAPABILITIES), \ | |
2eadc33f | 56 | S(SNK_NEGOTIATE_PPS_CAPABILITIES), \ |
f0690a25 GR |
57 | S(SNK_TRANSITION_SINK), \ |
58 | S(SNK_TRANSITION_SINK_VBUS), \ | |
59 | S(SNK_READY), \ | |
60 | \ | |
61 | S(ACC_UNATTACHED), \ | |
62 | S(DEBUG_ACC_ATTACHED), \ | |
63 | S(AUDIO_ACC_ATTACHED), \ | |
64 | S(AUDIO_ACC_DEBOUNCE), \ | |
65 | \ | |
66 | S(HARD_RESET_SEND), \ | |
67 | S(HARD_RESET_START), \ | |
68 | S(SRC_HARD_RESET_VBUS_OFF), \ | |
69 | S(SRC_HARD_RESET_VBUS_ON), \ | |
70 | S(SNK_HARD_RESET_SINK_OFF), \ | |
71 | S(SNK_HARD_RESET_WAIT_VBUS), \ | |
72 | S(SNK_HARD_RESET_SINK_ON), \ | |
73 | \ | |
74 | S(SOFT_RESET), \ | |
75 | S(SOFT_RESET_SEND), \ | |
76 | \ | |
77 | S(DR_SWAP_ACCEPT), \ | |
78 | S(DR_SWAP_SEND), \ | |
79 | S(DR_SWAP_SEND_TIMEOUT), \ | |
80 | S(DR_SWAP_CANCEL), \ | |
81 | S(DR_SWAP_CHANGE_DR), \ | |
82 | \ | |
83 | S(PR_SWAP_ACCEPT), \ | |
84 | S(PR_SWAP_SEND), \ | |
85 | S(PR_SWAP_SEND_TIMEOUT), \ | |
86 | S(PR_SWAP_CANCEL), \ | |
87 | S(PR_SWAP_START), \ | |
88 | S(PR_SWAP_SRC_SNK_TRANSITION_OFF), \ | |
89 | S(PR_SWAP_SRC_SNK_SOURCE_OFF), \ | |
b965b631 | 90 | S(PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED), \ |
f0690a25 GR |
91 | S(PR_SWAP_SRC_SNK_SINK_ON), \ |
92 | S(PR_SWAP_SNK_SRC_SINK_OFF), \ | |
93 | S(PR_SWAP_SNK_SRC_SOURCE_ON), \ | |
b965b631 | 94 | S(PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP), \ |
f0690a25 GR |
95 | \ |
96 | S(VCONN_SWAP_ACCEPT), \ | |
97 | S(VCONN_SWAP_SEND), \ | |
98 | S(VCONN_SWAP_SEND_TIMEOUT), \ | |
99 | S(VCONN_SWAP_CANCEL), \ | |
100 | S(VCONN_SWAP_START), \ | |
101 | S(VCONN_SWAP_WAIT_FOR_VCONN), \ | |
102 | S(VCONN_SWAP_TURN_ON_VCONN), \ | |
103 | S(VCONN_SWAP_TURN_OFF_VCONN), \ | |
104 | \ | |
105 | S(SNK_TRY), \ | |
106 | S(SNK_TRY_WAIT), \ | |
a0a3e04e BJS |
107 | S(SNK_TRY_WAIT_DEBOUNCE), \ |
108 | S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \ | |
f0690a25 | 109 | S(SRC_TRYWAIT), \ |
02d5be46 | 110 | S(SRC_TRYWAIT_DEBOUNCE), \ |
f0690a25 GR |
111 | S(SRC_TRYWAIT_UNATTACHED), \ |
112 | \ | |
113 | S(SRC_TRY), \ | |
131c7d12 | 114 | S(SRC_TRY_WAIT), \ |
f0690a25 GR |
115 | S(SRC_TRY_DEBOUNCE), \ |
116 | S(SNK_TRYWAIT), \ | |
117 | S(SNK_TRYWAIT_DEBOUNCE), \ | |
118 | S(SNK_TRYWAIT_VBUS), \ | |
119 | S(BIST_RX), \ | |
120 | \ | |
64f7c494 AT |
121 | S(GET_STATUS_SEND), \ |
122 | S(GET_STATUS_SEND_TIMEOUT), \ | |
123 | S(GET_PPS_STATUS_SEND), \ | |
124 | S(GET_PPS_STATUS_SEND_TIMEOUT), \ | |
125 | \ | |
f0690a25 | 126 | S(ERROR_RECOVERY), \ |
b17dd571 GR |
127 | S(PORT_RESET), \ |
128 | S(PORT_RESET_WAIT_OFF) | |
f0690a25 GR |
129 | |
130 | #define GENERATE_ENUM(e) e | |
131 | #define GENERATE_STRING(s) #s | |
132 | ||
133 | enum tcpm_state { | |
134 | FOREACH_STATE(GENERATE_ENUM) | |
135 | }; | |
136 | ||
137 | static const char * const tcpm_states[] = { | |
138 | FOREACH_STATE(GENERATE_STRING) | |
139 | }; | |
140 | ||
141 | enum vdm_states { | |
142 | VDM_STATE_ERR_BUSY = -3, | |
143 | VDM_STATE_ERR_SEND = -2, | |
144 | VDM_STATE_ERR_TMOUT = -1, | |
145 | VDM_STATE_DONE = 0, | |
146 | /* Anything >0 represents an active state */ | |
147 | VDM_STATE_READY = 1, | |
148 | VDM_STATE_BUSY = 2, | |
149 | VDM_STATE_WAIT_RSP_BUSY = 3, | |
150 | }; | |
151 | ||
152 | enum pd_msg_request { | |
153 | PD_MSG_NONE = 0, | |
154 | PD_MSG_CTRL_REJECT, | |
155 | PD_MSG_CTRL_WAIT, | |
64f7c494 | 156 | PD_MSG_CTRL_NOT_SUPP, |
f0690a25 GR |
157 | PD_MSG_DATA_SINK_CAP, |
158 | PD_MSG_DATA_SOURCE_CAP, | |
159 | }; | |
160 | ||
161 | /* Events from low level driver */ | |
162 | ||
163 | #define TCPM_CC_EVENT BIT(0) | |
164 | #define TCPM_VBUS_EVENT BIT(1) | |
165 | #define TCPM_RESET_EVENT BIT(2) | |
166 | ||
167 | #define LOG_BUFFER_ENTRIES 1024 | |
168 | #define LOG_BUFFER_ENTRY_SIZE 128 | |
169 | ||
170 | /* Alternate mode support */ | |
171 | ||
172 | #define SVID_DISCOVERY_MAX 16 | |
e9576fe8 | 173 | #define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX) |
f0690a25 GR |
174 | |
175 | struct pd_mode_data { | |
176 | int svid_index; /* current SVID index */ | |
177 | int nsvids; | |
178 | u16 svids[SVID_DISCOVERY_MAX]; | |
179 | int altmodes; /* number of alternate modes */ | |
e9576fe8 | 180 | struct typec_altmode_desc altmode_desc[ALTMODE_DISCOVERY_MAX]; |
f0690a25 GR |
181 | }; |
182 | ||
2eadc33f AT |
183 | struct pd_pps_data { |
184 | u32 min_volt; | |
185 | u32 max_volt; | |
186 | u32 max_curr; | |
187 | u32 out_volt; | |
188 | u32 op_curr; | |
189 | bool supported; | |
190 | bool active; | |
191 | }; | |
192 | ||
f0690a25 GR |
193 | struct tcpm_port { |
194 | struct device *dev; | |
195 | ||
196 | struct mutex lock; /* tcpm state machine lock */ | |
197 | struct workqueue_struct *wq; | |
198 | ||
199 | struct typec_capability typec_caps; | |
200 | struct typec_port *typec_port; | |
201 | ||
202 | struct tcpc_dev *tcpc; | |
2000016c | 203 | struct usb_role_switch *role_sw; |
f0690a25 GR |
204 | |
205 | enum typec_role vconn_role; | |
206 | enum typec_role pwr_role; | |
207 | enum typec_data_role data_role; | |
208 | enum typec_pwr_opmode pwr_opmode; | |
209 | ||
210 | struct usb_pd_identity partner_ident; | |
211 | struct typec_partner_desc partner_desc; | |
212 | struct typec_partner *partner; | |
213 | ||
214 | enum typec_cc_status cc_req; | |
215 | ||
216 | enum typec_cc_status cc1; | |
217 | enum typec_cc_status cc2; | |
218 | enum typec_cc_polarity polarity; | |
219 | ||
220 | bool attached; | |
221 | bool connected; | |
9b0ae699 | 222 | enum typec_port_type port_type; |
f0690a25 GR |
223 | bool vbus_present; |
224 | bool vbus_never_low; | |
225 | bool vbus_source; | |
226 | bool vbus_charge; | |
227 | ||
228 | bool send_discover; | |
229 | bool op_vsafe5v; | |
230 | ||
231 | int try_role; | |
232 | int try_snk_count; | |
233 | int try_src_count; | |
234 | ||
235 | enum pd_msg_request queued_message; | |
236 | ||
237 | enum tcpm_state enter_state; | |
238 | enum tcpm_state prev_state; | |
239 | enum tcpm_state state; | |
240 | enum tcpm_state delayed_state; | |
241 | unsigned long delayed_runtime; | |
242 | unsigned long delay_ms; | |
243 | ||
244 | spinlock_t pd_event_lock; | |
245 | u32 pd_events; | |
246 | ||
247 | struct work_struct event_work; | |
248 | struct delayed_work state_machine; | |
249 | struct delayed_work vdm_state_machine; | |
250 | bool state_machine_running; | |
251 | ||
252 | struct completion tx_complete; | |
253 | enum tcpm_transmit_status tx_status; | |
254 | ||
255 | struct mutex swap_lock; /* swap command lock */ | |
256 | bool swap_pending; | |
b17dd571 | 257 | bool non_pd_role_swap; |
f0690a25 GR |
258 | struct completion swap_complete; |
259 | int swap_status; | |
260 | ||
2eadc33f | 261 | unsigned int negotiated_rev; |
f0690a25 GR |
262 | unsigned int message_id; |
263 | unsigned int caps_count; | |
264 | unsigned int hard_reset_count; | |
265 | bool pd_capable; | |
266 | bool explicit_contract; | |
5fec4b54 | 267 | unsigned int rx_msgid; |
f0690a25 GR |
268 | |
269 | /* Partner capabilities/requests */ | |
270 | u32 sink_request; | |
271 | u32 source_caps[PDO_MAX_OBJECTS]; | |
272 | unsigned int nr_source_caps; | |
273 | u32 sink_caps[PDO_MAX_OBJECTS]; | |
274 | unsigned int nr_sink_caps; | |
275 | ||
276 | /* Local capabilities */ | |
277 | u32 src_pdo[PDO_MAX_OBJECTS]; | |
278 | unsigned int nr_src_pdo; | |
279 | u32 snk_pdo[PDO_MAX_OBJECTS]; | |
280 | unsigned int nr_snk_pdo; | |
193a6801 GR |
281 | u32 snk_vdo[VDO_MAX_OBJECTS]; |
282 | unsigned int nr_snk_vdo; | |
f0690a25 | 283 | |
f0690a25 | 284 | unsigned int operating_snk_mw; |
2eadc33f | 285 | bool update_sink_caps; |
f0690a25 GR |
286 | |
287 | /* Requested current / voltage */ | |
288 | u32 current_limit; | |
289 | u32 supply_voltage; | |
290 | ||
f2a8aa05 AT |
291 | /* Used to export TA voltage and current */ |
292 | struct power_supply *psy; | |
293 | struct power_supply_desc psy_desc; | |
294 | enum power_supply_usb_type usb_type; | |
295 | ||
f0690a25 GR |
296 | u32 bist_request; |
297 | ||
298 | /* PD state for Vendor Defined Messages */ | |
299 | enum vdm_states vdm_state; | |
300 | u32 vdm_retries; | |
301 | /* next Vendor Defined Message to send */ | |
302 | u32 vdo_data[VDO_MAX_SIZE]; | |
303 | u8 vdo_count; | |
304 | /* VDO to retry if UFP responder replied busy */ | |
305 | u32 vdo_retry; | |
306 | ||
2eadc33f AT |
307 | /* PPS */ |
308 | struct pd_pps_data pps_data; | |
309 | struct completion pps_complete; | |
310 | bool pps_pending; | |
311 | int pps_status; | |
f0690a25 | 312 | |
2eadc33f | 313 | /* Alternate mode data */ |
f0690a25 | 314 | struct pd_mode_data mode_data; |
e9576fe8 HK |
315 | struct typec_altmode *partner_altmode[ALTMODE_DISCOVERY_MAX]; |
316 | struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX]; | |
f0690a25 | 317 | |
02d5be46 BJS |
318 | /* Deadline in jiffies to exit src_try_wait state */ |
319 | unsigned long max_wait; | |
320 | ||
23b5f732 BJS |
321 | /* port belongs to a self powered device */ |
322 | bool self_powered; | |
323 | ||
f0690a25 GR |
324 | #ifdef CONFIG_DEBUG_FS |
325 | struct dentry *dentry; | |
326 | struct mutex logbuffer_lock; /* log buffer access lock */ | |
327 | int logbuffer_head; | |
328 | int logbuffer_tail; | |
329 | u8 *logbuffer[LOG_BUFFER_ENTRIES]; | |
330 | #endif | |
331 | }; | |
332 | ||
333 | struct pd_rx_event { | |
334 | struct work_struct work; | |
335 | struct tcpm_port *port; | |
336 | struct pd_message msg; | |
337 | }; | |
338 | ||
339 | #define tcpm_cc_is_sink(cc) \ | |
340 | ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \ | |
341 | (cc) == TYPEC_CC_RP_3_0) | |
342 | ||
343 | #define tcpm_port_is_sink(port) \ | |
344 | ((tcpm_cc_is_sink((port)->cc1) && !tcpm_cc_is_sink((port)->cc2)) || \ | |
345 | (tcpm_cc_is_sink((port)->cc2) && !tcpm_cc_is_sink((port)->cc1))) | |
346 | ||
347 | #define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD) | |
348 | #define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA) | |
349 | #define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN) | |
350 | ||
351 | #define tcpm_port_is_source(port) \ | |
352 | ((tcpm_cc_is_source((port)->cc1) && \ | |
353 | !tcpm_cc_is_source((port)->cc2)) || \ | |
354 | (tcpm_cc_is_source((port)->cc2) && \ | |
355 | !tcpm_cc_is_source((port)->cc1))) | |
356 | ||
357 | #define tcpm_port_is_debug(port) \ | |
358 | (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2)) | |
359 | ||
360 | #define tcpm_port_is_audio(port) \ | |
361 | (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2)) | |
362 | ||
363 | #define tcpm_port_is_audio_detached(port) \ | |
364 | ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \ | |
365 | (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1))) | |
366 | ||
367 | #define tcpm_try_snk(port) \ | |
ff6c8cb1 BJS |
368 | ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \ |
369 | (port)->port_type == TYPEC_PORT_DRP) | |
f0690a25 GR |
370 | |
371 | #define tcpm_try_src(port) \ | |
ff6c8cb1 BJS |
372 | ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \ |
373 | (port)->port_type == TYPEC_PORT_DRP) | |
f0690a25 GR |
374 | |
375 | static enum tcpm_state tcpm_default_state(struct tcpm_port *port) | |
376 | { | |
9b0ae699 | 377 | if (port->port_type == TYPEC_PORT_DRP) { |
b46a9c90 BJS |
378 | if (port->try_role == TYPEC_SINK) |
379 | return SNK_UNATTACHED; | |
380 | else if (port->try_role == TYPEC_SOURCE) | |
381 | return SRC_UNATTACHED; | |
1957de95 GR |
382 | else if (port->tcpc->config && |
383 | port->tcpc->config->default_role == TYPEC_SINK) | |
b46a9c90 BJS |
384 | return SNK_UNATTACHED; |
385 | /* Fall through to return SRC_UNATTACHED */ | |
ceeb1625 | 386 | } else if (port->port_type == TYPEC_PORT_SNK) { |
f0690a25 | 387 | return SNK_UNATTACHED; |
b46a9c90 | 388 | } |
f0690a25 GR |
389 | return SRC_UNATTACHED; |
390 | } | |
391 | ||
392 | static inline | |
393 | struct tcpm_port *typec_cap_to_tcpm(const struct typec_capability *cap) | |
394 | { | |
395 | return container_of(cap, struct tcpm_port, typec_caps); | |
396 | } | |
397 | ||
398 | static bool tcpm_port_is_disconnected(struct tcpm_port *port) | |
399 | { | |
400 | return (!port->attached && port->cc1 == TYPEC_CC_OPEN && | |
401 | port->cc2 == TYPEC_CC_OPEN) || | |
402 | (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 && | |
403 | port->cc1 == TYPEC_CC_OPEN) || | |
404 | (port->polarity == TYPEC_POLARITY_CC2 && | |
405 | port->cc2 == TYPEC_CC_OPEN))); | |
406 | } | |
407 | ||
408 | /* | |
409 | * Logging | |
410 | */ | |
411 | ||
412 | #ifdef CONFIG_DEBUG_FS | |
413 | ||
414 | static bool tcpm_log_full(struct tcpm_port *port) | |
415 | { | |
416 | return port->logbuffer_tail == | |
417 | (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; | |
418 | } | |
419 | ||
e79e0125 | 420 | __printf(2, 0) |
f0690a25 GR |
421 | static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args) |
422 | { | |
423 | char tmpbuffer[LOG_BUFFER_ENTRY_SIZE]; | |
424 | u64 ts_nsec = local_clock(); | |
425 | unsigned long rem_nsec; | |
426 | ||
d5a4f935 | 427 | mutex_lock(&port->logbuffer_lock); |
f0690a25 GR |
428 | if (!port->logbuffer[port->logbuffer_head]) { |
429 | port->logbuffer[port->logbuffer_head] = | |
430 | kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL); | |
d5a4f935 PC |
431 | if (!port->logbuffer[port->logbuffer_head]) { |
432 | mutex_unlock(&port->logbuffer_lock); | |
f0690a25 | 433 | return; |
d5a4f935 | 434 | } |
f0690a25 GR |
435 | } |
436 | ||
437 | vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args); | |
438 | ||
f0690a25 GR |
439 | if (tcpm_log_full(port)) { |
440 | port->logbuffer_head = max(port->logbuffer_head - 1, 0); | |
441 | strcpy(tmpbuffer, "overflow"); | |
442 | } | |
443 | ||
444 | if (port->logbuffer_head < 0 || | |
445 | port->logbuffer_head >= LOG_BUFFER_ENTRIES) { | |
446 | dev_warn(port->dev, | |
447 | "Bad log buffer index %d\n", port->logbuffer_head); | |
448 | goto abort; | |
449 | } | |
450 | ||
451 | if (!port->logbuffer[port->logbuffer_head]) { | |
452 | dev_warn(port->dev, | |
453 | "Log buffer index %d is NULL\n", port->logbuffer_head); | |
454 | goto abort; | |
455 | } | |
456 | ||
457 | rem_nsec = do_div(ts_nsec, 1000000000); | |
458 | scnprintf(port->logbuffer[port->logbuffer_head], | |
459 | LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s", | |
460 | (unsigned long)ts_nsec, rem_nsec / 1000, | |
461 | tmpbuffer); | |
462 | port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; | |
463 | ||
464 | abort: | |
465 | mutex_unlock(&port->logbuffer_lock); | |
466 | } | |
467 | ||
e79e0125 | 468 | __printf(2, 3) |
f0690a25 GR |
469 | static void tcpm_log(struct tcpm_port *port, const char *fmt, ...) |
470 | { | |
471 | va_list args; | |
472 | ||
473 | /* Do not log while disconnected and unattached */ | |
474 | if (tcpm_port_is_disconnected(port) && | |
475 | (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED || | |
7893f9e1 | 476 | port->state == TOGGLING)) |
f0690a25 GR |
477 | return; |
478 | ||
479 | va_start(args, fmt); | |
480 | _tcpm_log(port, fmt, args); | |
481 | va_end(args); | |
482 | } | |
483 | ||
e79e0125 | 484 | __printf(2, 3) |
f0690a25 GR |
485 | static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) |
486 | { | |
487 | va_list args; | |
488 | ||
489 | va_start(args, fmt); | |
490 | _tcpm_log(port, fmt, args); | |
491 | va_end(args); | |
492 | } | |
493 | ||
494 | static void tcpm_log_source_caps(struct tcpm_port *port) | |
495 | { | |
496 | int i; | |
497 | ||
498 | for (i = 0; i < port->nr_source_caps; i++) { | |
499 | u32 pdo = port->source_caps[i]; | |
500 | enum pd_pdo_type type = pdo_type(pdo); | |
501 | char msg[64]; | |
502 | ||
503 | switch (type) { | |
504 | case PDO_TYPE_FIXED: | |
505 | scnprintf(msg, sizeof(msg), | |
506 | "%u mV, %u mA [%s%s%s%s%s%s]", | |
507 | pdo_fixed_voltage(pdo), | |
508 | pdo_max_current(pdo), | |
509 | (pdo & PDO_FIXED_DUAL_ROLE) ? | |
510 | "R" : "", | |
511 | (pdo & PDO_FIXED_SUSPEND) ? | |
512 | "S" : "", | |
513 | (pdo & PDO_FIXED_HIGHER_CAP) ? | |
514 | "H" : "", | |
515 | (pdo & PDO_FIXED_USB_COMM) ? | |
516 | "U" : "", | |
517 | (pdo & PDO_FIXED_DATA_SWAP) ? | |
518 | "D" : "", | |
519 | (pdo & PDO_FIXED_EXTPOWER) ? | |
520 | "E" : ""); | |
521 | break; | |
522 | case PDO_TYPE_VAR: | |
523 | scnprintf(msg, sizeof(msg), | |
524 | "%u-%u mV, %u mA", | |
525 | pdo_min_voltage(pdo), | |
526 | pdo_max_voltage(pdo), | |
527 | pdo_max_current(pdo)); | |
528 | break; | |
529 | case PDO_TYPE_BATT: | |
530 | scnprintf(msg, sizeof(msg), | |
531 | "%u-%u mV, %u mW", | |
532 | pdo_min_voltage(pdo), | |
533 | pdo_max_voltage(pdo), | |
534 | pdo_max_power(pdo)); | |
535 | break; | |
2eadc33f AT |
536 | case PDO_TYPE_APDO: |
537 | if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) | |
538 | scnprintf(msg, sizeof(msg), | |
539 | "%u-%u mV, %u mA", | |
540 | pdo_pps_apdo_min_voltage(pdo), | |
541 | pdo_pps_apdo_max_voltage(pdo), | |
542 | pdo_pps_apdo_max_current(pdo)); | |
543 | else | |
544 | strcpy(msg, "undefined APDO"); | |
545 | break; | |
f0690a25 GR |
546 | default: |
547 | strcpy(msg, "undefined"); | |
548 | break; | |
549 | } | |
550 | tcpm_log(port, " PDO %d: type %d, %s", | |
551 | i, type, msg); | |
552 | } | |
553 | } | |
554 | ||
9e902c59 | 555 | static int tcpm_debug_show(struct seq_file *s, void *v) |
f0690a25 GR |
556 | { |
557 | struct tcpm_port *port = (struct tcpm_port *)s->private; | |
558 | int tail; | |
559 | ||
560 | mutex_lock(&port->logbuffer_lock); | |
561 | tail = port->logbuffer_tail; | |
562 | while (tail != port->logbuffer_head) { | |
563 | seq_printf(s, "%s\n", port->logbuffer[tail]); | |
564 | tail = (tail + 1) % LOG_BUFFER_ENTRIES; | |
565 | } | |
566 | if (!seq_has_overflowed(s)) | |
567 | port->logbuffer_tail = tail; | |
568 | mutex_unlock(&port->logbuffer_lock); | |
569 | ||
570 | return 0; | |
571 | } | |
9e902c59 | 572 | DEFINE_SHOW_ATTRIBUTE(tcpm_debug); |
f0690a25 GR |
573 | |
574 | static struct dentry *rootdir; | |
575 | ||
a941fc39 | 576 | static void tcpm_debugfs_init(struct tcpm_port *port) |
f0690a25 GR |
577 | { |
578 | mutex_init(&port->logbuffer_lock); | |
579 | /* /sys/kernel/debug/tcpm/usbcX */ | |
a941fc39 | 580 | if (!rootdir) |
f0690a25 | 581 | rootdir = debugfs_create_dir("tcpm", NULL); |
f0690a25 GR |
582 | |
583 | port->dentry = debugfs_create_file(dev_name(port->dev), | |
584 | S_IFREG | 0444, rootdir, | |
9e902c59 | 585 | port, &tcpm_debug_fops); |
f0690a25 GR |
586 | } |
587 | ||
588 | static void tcpm_debugfs_exit(struct tcpm_port *port) | |
589 | { | |
fd5da3e2 LJ |
590 | int i; |
591 | ||
592 | mutex_lock(&port->logbuffer_lock); | |
593 | for (i = 0; i < LOG_BUFFER_ENTRIES; i++) { | |
594 | kfree(port->logbuffer[i]); | |
595 | port->logbuffer[i] = NULL; | |
596 | } | |
597 | mutex_unlock(&port->logbuffer_lock); | |
598 | ||
f0690a25 | 599 | debugfs_remove(port->dentry); |
12ca7297 LJ |
600 | if (list_empty(&rootdir->d_subdirs)) { |
601 | debugfs_remove(rootdir); | |
602 | rootdir = NULL; | |
603 | } | |
f0690a25 GR |
604 | } |
605 | ||
606 | #else | |
607 | ||
e79e0125 | 608 | __printf(2, 3) |
f0690a25 | 609 | static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { } |
e79e0125 | 610 | __printf(2, 3) |
f0690a25 GR |
611 | static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { } |
612 | static void tcpm_log_source_caps(struct tcpm_port *port) { } | |
a941fc39 | 613 | static void tcpm_debugfs_init(const struct tcpm_port *port) { } |
f0690a25 GR |
614 | static void tcpm_debugfs_exit(const struct tcpm_port *port) { } |
615 | ||
616 | #endif | |
617 | ||
618 | static int tcpm_pd_transmit(struct tcpm_port *port, | |
619 | enum tcpm_transmit_type type, | |
620 | const struct pd_message *msg) | |
621 | { | |
622 | unsigned long timeout; | |
623 | int ret; | |
624 | ||
625 | if (msg) | |
626 | tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header)); | |
627 | else | |
628 | tcpm_log(port, "PD TX, type: %#x", type); | |
629 | ||
630 | reinit_completion(&port->tx_complete); | |
631 | ret = port->tcpc->pd_transmit(port->tcpc, type, msg); | |
632 | if (ret < 0) | |
633 | return ret; | |
634 | ||
635 | mutex_unlock(&port->lock); | |
636 | timeout = wait_for_completion_timeout(&port->tx_complete, | |
637 | msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT)); | |
638 | mutex_lock(&port->lock); | |
639 | if (!timeout) | |
640 | return -ETIMEDOUT; | |
641 | ||
642 | switch (port->tx_status) { | |
643 | case TCPC_TX_SUCCESS: | |
644 | port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK; | |
645 | return 0; | |
646 | case TCPC_TX_DISCARDED: | |
647 | return -EAGAIN; | |
648 | case TCPC_TX_FAILED: | |
649 | default: | |
650 | return -EIO; | |
651 | } | |
652 | } | |
653 | ||
654 | void tcpm_pd_transmit_complete(struct tcpm_port *port, | |
655 | enum tcpm_transmit_status status) | |
656 | { | |
657 | tcpm_log(port, "PD TX complete, status: %u", status); | |
658 | port->tx_status = status; | |
659 | complete(&port->tx_complete); | |
660 | } | |
661 | EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete); | |
662 | ||
e9576fe8 | 663 | static int tcpm_mux_set(struct tcpm_port *port, int state, |
2000016c HG |
664 | enum usb_role usb_role, |
665 | enum typec_orientation orientation) | |
f0690a25 | 666 | { |
2000016c | 667 | int ret; |
f0690a25 | 668 | |
e9576fe8 HK |
669 | tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d", |
670 | state, usb_role, orientation); | |
f0690a25 | 671 | |
2000016c HG |
672 | ret = typec_set_orientation(port->typec_port, orientation); |
673 | if (ret) | |
674 | return ret; | |
f0690a25 | 675 | |
2000016c HG |
676 | if (port->role_sw) { |
677 | ret = usb_role_switch_set_role(port->role_sw, usb_role); | |
678 | if (ret) | |
679 | return ret; | |
680 | } | |
681 | ||
e9576fe8 | 682 | return typec_set_mode(port->typec_port, state); |
f0690a25 GR |
683 | } |
684 | ||
685 | static int tcpm_set_polarity(struct tcpm_port *port, | |
686 | enum typec_cc_polarity polarity) | |
687 | { | |
688 | int ret; | |
689 | ||
690 | tcpm_log(port, "polarity %d", polarity); | |
691 | ||
692 | ret = port->tcpc->set_polarity(port->tcpc, polarity); | |
693 | if (ret < 0) | |
694 | return ret; | |
695 | ||
696 | port->polarity = polarity; | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | static int tcpm_set_vconn(struct tcpm_port *port, bool enable) | |
702 | { | |
703 | int ret; | |
704 | ||
705 | tcpm_log(port, "vconn:=%d", enable); | |
706 | ||
707 | ret = port->tcpc->set_vconn(port->tcpc, enable); | |
708 | if (!ret) { | |
709 | port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK; | |
710 | typec_set_vconn_role(port->typec_port, port->vconn_role); | |
711 | } | |
712 | ||
713 | return ret; | |
714 | } | |
715 | ||
716 | static u32 tcpm_get_current_limit(struct tcpm_port *port) | |
717 | { | |
718 | enum typec_cc_status cc; | |
719 | u32 limit; | |
720 | ||
721 | cc = port->polarity ? port->cc2 : port->cc1; | |
722 | switch (cc) { | |
723 | case TYPEC_CC_RP_1_5: | |
724 | limit = 1500; | |
725 | break; | |
726 | case TYPEC_CC_RP_3_0: | |
727 | limit = 3000; | |
728 | break; | |
729 | case TYPEC_CC_RP_DEF: | |
730 | default: | |
ea62cfc7 HG |
731 | if (port->tcpc->get_current_limit) |
732 | limit = port->tcpc->get_current_limit(port->tcpc); | |
733 | else | |
734 | limit = 0; | |
f0690a25 GR |
735 | break; |
736 | } | |
737 | ||
738 | return limit; | |
739 | } | |
740 | ||
741 | static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv) | |
742 | { | |
743 | int ret = -EOPNOTSUPP; | |
744 | ||
745 | tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma); | |
746 | ||
146971e6 HG |
747 | port->supply_voltage = mv; |
748 | port->current_limit = max_ma; | |
749 | ||
f0690a25 GR |
750 | if (port->tcpc->set_current_limit) |
751 | ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv); | |
752 | ||
753 | return ret; | |
754 | } | |
755 | ||
756 | /* | |
757 | * Determine RP value to set based on maximum current supported | |
758 | * by a port if configured as source. | |
759 | * Returns CC value to report to link partner. | |
760 | */ | |
761 | static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port) | |
762 | { | |
763 | const u32 *src_pdo = port->src_pdo; | |
764 | int nr_pdo = port->nr_src_pdo; | |
765 | int i; | |
766 | ||
767 | /* | |
768 | * Search for first entry with matching voltage. | |
769 | * It should report the maximum supported current. | |
770 | */ | |
771 | for (i = 0; i < nr_pdo; i++) { | |
772 | const u32 pdo = src_pdo[i]; | |
773 | ||
774 | if (pdo_type(pdo) == PDO_TYPE_FIXED && | |
775 | pdo_fixed_voltage(pdo) == 5000) { | |
776 | unsigned int curr = pdo_max_current(pdo); | |
777 | ||
778 | if (curr >= 3000) | |
779 | return TYPEC_CC_RP_3_0; | |
780 | else if (curr >= 1500) | |
781 | return TYPEC_CC_RP_1_5; | |
782 | return TYPEC_CC_RP_DEF; | |
783 | } | |
784 | } | |
785 | ||
786 | return TYPEC_CC_RP_DEF; | |
787 | } | |
788 | ||
789 | static int tcpm_set_attached_state(struct tcpm_port *port, bool attached) | |
790 | { | |
791 | return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role, | |
792 | port->data_role); | |
793 | } | |
794 | ||
795 | static int tcpm_set_roles(struct tcpm_port *port, bool attached, | |
796 | enum typec_role role, enum typec_data_role data) | |
797 | { | |
2000016c | 798 | enum typec_orientation orientation; |
c6962c29 | 799 | enum usb_role usb_role; |
f0690a25 GR |
800 | int ret; |
801 | ||
2000016c HG |
802 | if (port->polarity == TYPEC_POLARITY_CC1) |
803 | orientation = TYPEC_ORIENTATION_NORMAL; | |
804 | else | |
805 | orientation = TYPEC_ORIENTATION_REVERSE; | |
806 | ||
f0690a25 | 807 | if (data == TYPEC_HOST) |
c6962c29 | 808 | usb_role = USB_ROLE_HOST; |
f0690a25 | 809 | else |
c6962c29 HG |
810 | usb_role = USB_ROLE_DEVICE; |
811 | ||
e9576fe8 | 812 | ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation); |
f0690a25 GR |
813 | if (ret < 0) |
814 | return ret; | |
815 | ||
816 | ret = port->tcpc->set_roles(port->tcpc, attached, role, data); | |
817 | if (ret < 0) | |
818 | return ret; | |
819 | ||
820 | port->pwr_role = role; | |
821 | port->data_role = data; | |
822 | typec_set_data_role(port->typec_port, data); | |
823 | typec_set_pwr_role(port->typec_port, role); | |
824 | ||
825 | return 0; | |
826 | } | |
827 | ||
828 | static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role) | |
829 | { | |
830 | int ret; | |
831 | ||
832 | ret = port->tcpc->set_roles(port->tcpc, true, role, | |
833 | port->data_role); | |
834 | if (ret < 0) | |
835 | return ret; | |
836 | ||
837 | port->pwr_role = role; | |
838 | typec_set_pwr_role(port->typec_port, role); | |
839 | ||
840 | return 0; | |
841 | } | |
842 | ||
843 | static int tcpm_pd_send_source_caps(struct tcpm_port *port) | |
844 | { | |
845 | struct pd_message msg; | |
846 | int i; | |
847 | ||
848 | memset(&msg, 0, sizeof(msg)); | |
849 | if (!port->nr_src_pdo) { | |
850 | /* No source capabilities defined, sink only */ | |
851 | msg.header = PD_HEADER_LE(PD_CTRL_REJECT, | |
852 | port->pwr_role, | |
853 | port->data_role, | |
2eadc33f | 854 | port->negotiated_rev, |
f0690a25 GR |
855 | port->message_id, 0); |
856 | } else { | |
857 | msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP, | |
858 | port->pwr_role, | |
859 | port->data_role, | |
2eadc33f | 860 | port->negotiated_rev, |
f0690a25 GR |
861 | port->message_id, |
862 | port->nr_src_pdo); | |
863 | } | |
864 | for (i = 0; i < port->nr_src_pdo; i++) | |
865 | msg.payload[i] = cpu_to_le32(port->src_pdo[i]); | |
866 | ||
867 | return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); | |
868 | } | |
869 | ||
870 | static int tcpm_pd_send_sink_caps(struct tcpm_port *port) | |
871 | { | |
872 | struct pd_message msg; | |
873 | int i; | |
874 | ||
875 | memset(&msg, 0, sizeof(msg)); | |
876 | if (!port->nr_snk_pdo) { | |
877 | /* No sink capabilities defined, source only */ | |
878 | msg.header = PD_HEADER_LE(PD_CTRL_REJECT, | |
879 | port->pwr_role, | |
880 | port->data_role, | |
2eadc33f | 881 | port->negotiated_rev, |
f0690a25 GR |
882 | port->message_id, 0); |
883 | } else { | |
884 | msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP, | |
885 | port->pwr_role, | |
886 | port->data_role, | |
2eadc33f | 887 | port->negotiated_rev, |
f0690a25 GR |
888 | port->message_id, |
889 | port->nr_snk_pdo); | |
890 | } | |
891 | for (i = 0; i < port->nr_snk_pdo; i++) | |
892 | msg.payload[i] = cpu_to_le32(port->snk_pdo[i]); | |
893 | ||
894 | return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); | |
895 | } | |
896 | ||
897 | static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state, | |
898 | unsigned int delay_ms) | |
899 | { | |
900 | if (delay_ms) { | |
901 | tcpm_log(port, "pending state change %s -> %s @ %u ms", | |
902 | tcpm_states[port->state], tcpm_states[state], | |
903 | delay_ms); | |
904 | port->delayed_state = state; | |
905 | mod_delayed_work(port->wq, &port->state_machine, | |
906 | msecs_to_jiffies(delay_ms)); | |
907 | port->delayed_runtime = jiffies + msecs_to_jiffies(delay_ms); | |
908 | port->delay_ms = delay_ms; | |
909 | } else { | |
910 | tcpm_log(port, "state change %s -> %s", | |
911 | tcpm_states[port->state], tcpm_states[state]); | |
912 | port->delayed_state = INVALID_STATE; | |
913 | port->prev_state = port->state; | |
914 | port->state = state; | |
915 | /* | |
916 | * Don't re-queue the state machine work item if we're currently | |
917 | * in the state machine and we're immediately changing states. | |
918 | * tcpm_state_machine_work() will continue running the state | |
919 | * machine. | |
920 | */ | |
921 | if (!port->state_machine_running) | |
922 | mod_delayed_work(port->wq, &port->state_machine, 0); | |
923 | } | |
924 | } | |
925 | ||
926 | static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state, | |
927 | unsigned int delay_ms) | |
928 | { | |
929 | if (port->enter_state == port->state) | |
930 | tcpm_set_state(port, state, delay_ms); | |
931 | else | |
932 | tcpm_log(port, | |
933 | "skipped %sstate change %s -> %s [%u ms], context state %s", | |
934 | delay_ms ? "delayed " : "", | |
935 | tcpm_states[port->state], tcpm_states[state], | |
936 | delay_ms, tcpm_states[port->enter_state]); | |
937 | } | |
938 | ||
939 | static void tcpm_queue_message(struct tcpm_port *port, | |
940 | enum pd_msg_request message) | |
941 | { | |
942 | port->queued_message = message; | |
943 | mod_delayed_work(port->wq, &port->state_machine, 0); | |
944 | } | |
945 | ||
946 | /* | |
947 | * VDM/VDO handling functions | |
948 | */ | |
949 | static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header, | |
950 | const u32 *data, int cnt) | |
951 | { | |
952 | port->vdo_count = cnt + 1; | |
953 | port->vdo_data[0] = header; | |
954 | memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt); | |
955 | /* Set ready, vdm state machine will actually send */ | |
956 | port->vdm_retries = 0; | |
957 | port->vdm_state = VDM_STATE_READY; | |
958 | } | |
959 | ||
960 | static void svdm_consume_identity(struct tcpm_port *port, const __le32 *payload, | |
961 | int cnt) | |
962 | { | |
963 | u32 vdo = le32_to_cpu(payload[VDO_INDEX_IDH]); | |
964 | u32 product = le32_to_cpu(payload[VDO_INDEX_PRODUCT]); | |
965 | ||
966 | memset(&port->mode_data, 0, sizeof(port->mode_data)); | |
967 | ||
f0690a25 GR |
968 | port->partner_ident.id_header = vdo; |
969 | port->partner_ident.cert_stat = le32_to_cpu(payload[VDO_INDEX_CSTAT]); | |
970 | port->partner_ident.product = product; | |
971 | ||
972 | typec_partner_set_identity(port->partner); | |
973 | ||
974 | tcpm_log(port, "Identity: %04x:%04x.%04x", | |
975 | PD_IDH_VID(vdo), | |
976 | PD_PRODUCT_PID(product), product & 0xffff); | |
977 | } | |
978 | ||
979 | static bool svdm_consume_svids(struct tcpm_port *port, const __le32 *payload, | |
980 | int cnt) | |
981 | { | |
982 | struct pd_mode_data *pmdata = &port->mode_data; | |
983 | int i; | |
984 | ||
985 | for (i = 1; i < cnt; i++) { | |
986 | u32 p = le32_to_cpu(payload[i]); | |
987 | u16 svid; | |
988 | ||
989 | svid = (p >> 16) & 0xffff; | |
990 | if (!svid) | |
991 | return false; | |
992 | ||
993 | if (pmdata->nsvids >= SVID_DISCOVERY_MAX) | |
994 | goto abort; | |
995 | ||
996 | pmdata->svids[pmdata->nsvids++] = svid; | |
997 | tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid); | |
998 | ||
999 | svid = p & 0xffff; | |
1000 | if (!svid) | |
1001 | return false; | |
1002 | ||
1003 | if (pmdata->nsvids >= SVID_DISCOVERY_MAX) | |
1004 | goto abort; | |
1005 | ||
1006 | pmdata->svids[pmdata->nsvids++] = svid; | |
1007 | tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid); | |
1008 | } | |
1009 | return true; | |
1010 | abort: | |
1011 | tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX); | |
1012 | return false; | |
1013 | } | |
1014 | ||
1015 | static void svdm_consume_modes(struct tcpm_port *port, const __le32 *payload, | |
1016 | int cnt) | |
1017 | { | |
1018 | struct pd_mode_data *pmdata = &port->mode_data; | |
1019 | struct typec_altmode_desc *paltmode; | |
f0690a25 GR |
1020 | int i; |
1021 | ||
1022 | if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) { | |
1023 | /* Already logged in svdm_consume_svids() */ | |
1024 | return; | |
1025 | } | |
1026 | ||
4ab8c18d HK |
1027 | for (i = 1; i < cnt; i++) { |
1028 | paltmode = &pmdata->altmode_desc[pmdata->altmodes]; | |
1029 | memset(paltmode, 0, sizeof(*paltmode)); | |
1030 | ||
1031 | paltmode->svid = pmdata->svids[pmdata->svid_index]; | |
1032 | paltmode->mode = i; | |
1033 | paltmode->vdo = le32_to_cpu(payload[i]); | |
1034 | ||
1035 | tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x", | |
1036 | pmdata->altmodes, paltmode->svid, | |
1037 | paltmode->mode, paltmode->vdo); | |
1038 | ||
4ab8c18d | 1039 | pmdata->altmodes++; |
f0690a25 | 1040 | } |
f0690a25 GR |
1041 | } |
1042 | ||
e9576fe8 HK |
1043 | static void tcpm_register_partner_altmodes(struct tcpm_port *port) |
1044 | { | |
1045 | struct pd_mode_data *modep = &port->mode_data; | |
1046 | struct typec_altmode *altmode; | |
1047 | int i; | |
1048 | ||
1049 | for (i = 0; i < modep->altmodes; i++) { | |
1050 | altmode = typec_partner_register_altmode(port->partner, | |
1051 | &modep->altmode_desc[i]); | |
1052 | if (!altmode) | |
1053 | tcpm_log(port, "Failed to register partner SVID 0x%04x", | |
1054 | modep->altmode_desc[i].svid); | |
1055 | port->partner_altmode[i] = altmode; | |
1056 | } | |
1057 | } | |
1058 | ||
f0690a25 GR |
1059 | #define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header) |
1060 | ||
1061 | static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt, | |
1062 | u32 *response) | |
1063 | { | |
e9576fe8 HK |
1064 | struct typec_altmode *adev; |
1065 | struct typec_altmode *pdev; | |
f0690a25 | 1066 | struct pd_mode_data *modep; |
e9576fe8 | 1067 | u32 p[PD_MAX_PAYLOAD]; |
f0690a25 | 1068 | int rlen = 0; |
e9576fe8 HK |
1069 | int cmd_type; |
1070 | int cmd; | |
193a6801 | 1071 | int i; |
f0690a25 | 1072 | |
e9576fe8 HK |
1073 | for (i = 0; i < cnt; i++) |
1074 | p[i] = le32_to_cpu(payload[i]); | |
1075 | ||
1076 | cmd_type = PD_VDO_CMDT(p[0]); | |
1077 | cmd = PD_VDO_CMD(p[0]); | |
1078 | ||
f0690a25 | 1079 | tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d", |
e9576fe8 | 1080 | p[0], cmd_type, cmd, cnt); |
f0690a25 GR |
1081 | |
1082 | modep = &port->mode_data; | |
1083 | ||
e9576fe8 HK |
1084 | adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX, |
1085 | PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0])); | |
1086 | ||
1087 | pdev = typec_match_altmode(port->partner_altmode, ALTMODE_DISCOVERY_MAX, | |
1088 | PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0])); | |
1089 | ||
f0690a25 GR |
1090 | switch (cmd_type) { |
1091 | case CMDT_INIT: | |
1092 | switch (cmd) { | |
1093 | case CMD_DISCOVER_IDENT: | |
193a6801 GR |
1094 | /* 6.4.4.3.1: Only respond as UFP (device) */ |
1095 | if (port->data_role == TYPEC_DEVICE && | |
1096 | port->nr_snk_vdo) { | |
1097 | for (i = 0; i < port->nr_snk_vdo; i++) | |
cbe5843e | 1098 | response[i + 1] = port->snk_vdo[i]; |
193a6801 GR |
1099 | rlen = port->nr_snk_vdo + 1; |
1100 | } | |
f0690a25 GR |
1101 | break; |
1102 | case CMD_DISCOVER_SVID: | |
1103 | break; | |
1104 | case CMD_DISCOVER_MODES: | |
1105 | break; | |
1106 | case CMD_ENTER_MODE: | |
1107 | break; | |
1108 | case CMD_EXIT_MODE: | |
1109 | break; | |
1110 | case CMD_ATTENTION: | |
e9576fe8 | 1111 | /* Attention command does not have response */ |
88d02c9b GR |
1112 | if (adev) |
1113 | typec_altmode_attention(adev, p[1]); | |
e9576fe8 | 1114 | return 0; |
f0690a25 GR |
1115 | default: |
1116 | break; | |
1117 | } | |
1118 | if (rlen >= 1) { | |
e9576fe8 | 1119 | response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK); |
f0690a25 | 1120 | } else if (rlen == 0) { |
e9576fe8 | 1121 | response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK); |
f0690a25 GR |
1122 | rlen = 1; |
1123 | } else { | |
e9576fe8 | 1124 | response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY); |
f0690a25 GR |
1125 | rlen = 1; |
1126 | } | |
1127 | break; | |
1128 | case CMDT_RSP_ACK: | |
1129 | /* silently drop message if we are not connected */ | |
cf6e06cd | 1130 | if (IS_ERR_OR_NULL(port->partner)) |
f0690a25 GR |
1131 | break; |
1132 | ||
1133 | switch (cmd) { | |
1134 | case CMD_DISCOVER_IDENT: | |
1135 | /* 6.4.4.3.1 */ | |
1136 | svdm_consume_identity(port, payload, cnt); | |
1137 | response[0] = VDO(USB_SID_PD, 1, CMD_DISCOVER_SVID); | |
1138 | rlen = 1; | |
1139 | break; | |
1140 | case CMD_DISCOVER_SVID: | |
1141 | /* 6.4.4.3.2 */ | |
1142 | if (svdm_consume_svids(port, payload, cnt)) { | |
1143 | response[0] = VDO(USB_SID_PD, 1, | |
1144 | CMD_DISCOVER_SVID); | |
1145 | rlen = 1; | |
1146 | } else if (modep->nsvids && supports_modal(port)) { | |
1147 | response[0] = VDO(modep->svids[0], 1, | |
1148 | CMD_DISCOVER_MODES); | |
1149 | rlen = 1; | |
1150 | } | |
1151 | break; | |
1152 | case CMD_DISCOVER_MODES: | |
1153 | /* 6.4.4.3.3 */ | |
1154 | svdm_consume_modes(port, payload, cnt); | |
1155 | modep->svid_index++; | |
1156 | if (modep->svid_index < modep->nsvids) { | |
e9576fe8 | 1157 | u16 svid = modep->svids[modep->svid_index]; |
f0690a25 GR |
1158 | response[0] = VDO(svid, 1, CMD_DISCOVER_MODES); |
1159 | rlen = 1; | |
1160 | } else { | |
e9576fe8 | 1161 | tcpm_register_partner_altmodes(port); |
f0690a25 GR |
1162 | } |
1163 | break; | |
1164 | case CMD_ENTER_MODE: | |
88d02c9b GR |
1165 | if (adev && pdev) { |
1166 | typec_altmode_update_active(pdev, true); | |
1167 | ||
1168 | if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) { | |
1169 | response[0] = VDO(adev->svid, 1, | |
1170 | CMD_EXIT_MODE); | |
1171 | response[0] |= VDO_OPOS(adev->mode); | |
1172 | return 1; | |
1173 | } | |
e9576fe8 HK |
1174 | } |
1175 | return 0; | |
1176 | case CMD_EXIT_MODE: | |
88d02c9b GR |
1177 | if (adev && pdev) { |
1178 | typec_altmode_update_active(pdev, false); | |
e9576fe8 | 1179 | |
88d02c9b GR |
1180 | /* Back to USB Operation */ |
1181 | WARN_ON(typec_altmode_notify(adev, | |
1182 | TYPEC_STATE_USB, | |
1183 | NULL)); | |
1184 | } | |
e9576fe8 HK |
1185 | break; |
1186 | default: | |
1187 | break; | |
1188 | } | |
1189 | break; | |
1190 | case CMDT_RSP_NAK: | |
1191 | switch (cmd) { | |
1192 | case CMD_ENTER_MODE: | |
1193 | /* Back to USB Operation */ | |
88d02c9b GR |
1194 | if (adev) |
1195 | WARN_ON(typec_altmode_notify(adev, | |
1196 | TYPEC_STATE_USB, | |
1197 | NULL)); | |
f0690a25 GR |
1198 | break; |
1199 | default: | |
1200 | break; | |
1201 | } | |
1202 | break; | |
1203 | default: | |
1204 | break; | |
1205 | } | |
1206 | ||
e9576fe8 | 1207 | /* Informing the alternate mode drivers about everything */ |
88d02c9b GR |
1208 | if (adev) |
1209 | typec_altmode_vdm(adev, p[0], &p[1], cnt); | |
e9576fe8 | 1210 | |
f0690a25 GR |
1211 | return rlen; |
1212 | } | |
1213 | ||
1214 | static void tcpm_handle_vdm_request(struct tcpm_port *port, | |
1215 | const __le32 *payload, int cnt) | |
1216 | { | |
1217 | int rlen = 0; | |
1218 | u32 response[8] = { }; | |
1219 | u32 p0 = le32_to_cpu(payload[0]); | |
1220 | ||
1221 | if (port->vdm_state == VDM_STATE_BUSY) { | |
1222 | /* If UFP responded busy retry after timeout */ | |
1223 | if (PD_VDO_CMDT(p0) == CMDT_RSP_BUSY) { | |
1224 | port->vdm_state = VDM_STATE_WAIT_RSP_BUSY; | |
1225 | port->vdo_retry = (p0 & ~VDO_CMDT_MASK) | | |
1226 | CMDT_INIT; | |
1227 | mod_delayed_work(port->wq, &port->vdm_state_machine, | |
1228 | msecs_to_jiffies(PD_T_VDM_BUSY)); | |
1229 | return; | |
1230 | } | |
1231 | port->vdm_state = VDM_STATE_DONE; | |
1232 | } | |
1233 | ||
1234 | if (PD_VDO_SVDM(p0)) | |
1235 | rlen = tcpm_pd_svdm(port, payload, cnt, response); | |
f0690a25 GR |
1236 | |
1237 | if (rlen > 0) { | |
1238 | tcpm_queue_vdm(port, response[0], &response[1], rlen - 1); | |
1239 | mod_delayed_work(port->wq, &port->vdm_state_machine, 0); | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd, | |
1244 | const u32 *data, int count) | |
1245 | { | |
1246 | u32 header; | |
1247 | ||
1248 | if (WARN_ON(count > VDO_MAX_SIZE - 1)) | |
1249 | count = VDO_MAX_SIZE - 1; | |
1250 | ||
1251 | /* set VDM header with VID & CMD */ | |
1252 | header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ? | |
1253 | 1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION), cmd); | |
1254 | tcpm_queue_vdm(port, header, data, count); | |
1255 | ||
1256 | mod_delayed_work(port->wq, &port->vdm_state_machine, 0); | |
1257 | } | |
1258 | ||
1259 | static unsigned int vdm_ready_timeout(u32 vdm_hdr) | |
1260 | { | |
1261 | unsigned int timeout; | |
1262 | int cmd = PD_VDO_CMD(vdm_hdr); | |
1263 | ||
1264 | /* its not a structured VDM command */ | |
1265 | if (!PD_VDO_SVDM(vdm_hdr)) | |
1266 | return PD_T_VDM_UNSTRUCTURED; | |
1267 | ||
1268 | switch (PD_VDO_CMDT(vdm_hdr)) { | |
1269 | case CMDT_INIT: | |
1270 | if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE) | |
1271 | timeout = PD_T_VDM_WAIT_MODE_E; | |
1272 | else | |
1273 | timeout = PD_T_VDM_SNDR_RSP; | |
1274 | break; | |
1275 | default: | |
1276 | if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE) | |
1277 | timeout = PD_T_VDM_E_MODE; | |
1278 | else | |
1279 | timeout = PD_T_VDM_RCVR_RSP; | |
1280 | break; | |
1281 | } | |
1282 | return timeout; | |
1283 | } | |
1284 | ||
1285 | static void vdm_run_state_machine(struct tcpm_port *port) | |
1286 | { | |
1287 | struct pd_message msg; | |
1288 | int i, res; | |
1289 | ||
1290 | switch (port->vdm_state) { | |
1291 | case VDM_STATE_READY: | |
1292 | /* Only transmit VDM if attached */ | |
1293 | if (!port->attached) { | |
1294 | port->vdm_state = VDM_STATE_ERR_BUSY; | |
1295 | break; | |
1296 | } | |
1297 | ||
1298 | /* | |
1299 | * if there's traffic or we're not in PDO ready state don't send | |
1300 | * a VDM. | |
1301 | */ | |
1302 | if (port->state != SRC_READY && port->state != SNK_READY) | |
1303 | break; | |
1304 | ||
1305 | /* Prepare and send VDM */ | |
1306 | memset(&msg, 0, sizeof(msg)); | |
1307 | msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF, | |
1308 | port->pwr_role, | |
1309 | port->data_role, | |
2eadc33f | 1310 | port->negotiated_rev, |
f0690a25 GR |
1311 | port->message_id, port->vdo_count); |
1312 | for (i = 0; i < port->vdo_count; i++) | |
1313 | msg.payload[i] = cpu_to_le32(port->vdo_data[i]); | |
1314 | res = tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); | |
1315 | if (res < 0) { | |
1316 | port->vdm_state = VDM_STATE_ERR_SEND; | |
1317 | } else { | |
1318 | unsigned long timeout; | |
1319 | ||
1320 | port->vdm_retries = 0; | |
1321 | port->vdm_state = VDM_STATE_BUSY; | |
1322 | timeout = vdm_ready_timeout(port->vdo_data[0]); | |
1323 | mod_delayed_work(port->wq, &port->vdm_state_machine, | |
1324 | timeout); | |
1325 | } | |
1326 | break; | |
1327 | case VDM_STATE_WAIT_RSP_BUSY: | |
1328 | port->vdo_data[0] = port->vdo_retry; | |
1329 | port->vdo_count = 1; | |
1330 | port->vdm_state = VDM_STATE_READY; | |
1331 | break; | |
1332 | case VDM_STATE_BUSY: | |
1333 | port->vdm_state = VDM_STATE_ERR_TMOUT; | |
1334 | break; | |
1335 | case VDM_STATE_ERR_SEND: | |
1336 | /* | |
1337 | * A partner which does not support USB PD will not reply, | |
1338 | * so this is not a fatal error. At the same time, some | |
1339 | * devices may not return GoodCRC under some circumstances, | |
1340 | * so we need to retry. | |
1341 | */ | |
1342 | if (port->vdm_retries < 3) { | |
1343 | tcpm_log(port, "VDM Tx error, retry"); | |
1344 | port->vdm_retries++; | |
1345 | port->vdm_state = VDM_STATE_READY; | |
1346 | } | |
1347 | break; | |
1348 | default: | |
1349 | break; | |
1350 | } | |
1351 | } | |
1352 | ||
1353 | static void vdm_state_machine_work(struct work_struct *work) | |
1354 | { | |
1355 | struct tcpm_port *port = container_of(work, struct tcpm_port, | |
1356 | vdm_state_machine.work); | |
1357 | enum vdm_states prev_state; | |
1358 | ||
1359 | mutex_lock(&port->lock); | |
1360 | ||
1361 | /* | |
1362 | * Continue running as long as the port is not busy and there was | |
1363 | * a state change. | |
1364 | */ | |
1365 | do { | |
1366 | prev_state = port->vdm_state; | |
1367 | vdm_run_state_machine(port); | |
1368 | } while (port->vdm_state != prev_state && | |
1369 | port->vdm_state != VDM_STATE_BUSY); | |
1370 | ||
1371 | mutex_unlock(&port->lock); | |
1372 | } | |
1373 | ||
5007e1b5 BJS |
1374 | enum pdo_err { |
1375 | PDO_NO_ERR, | |
1376 | PDO_ERR_NO_VSAFE5V, | |
1377 | PDO_ERR_VSAFE5V_NOT_FIRST, | |
1378 | PDO_ERR_PDO_TYPE_NOT_IN_ORDER, | |
1379 | PDO_ERR_FIXED_NOT_SORTED, | |
1380 | PDO_ERR_VARIABLE_BATT_NOT_SORTED, | |
1381 | PDO_ERR_DUPE_PDO, | |
2eadc33f AT |
1382 | PDO_ERR_PPS_APDO_NOT_SORTED, |
1383 | PDO_ERR_DUPE_PPS_APDO, | |
5007e1b5 BJS |
1384 | }; |
1385 | ||
1386 | static const char * const pdo_err_msg[] = { | |
1387 | [PDO_ERR_NO_VSAFE5V] = | |
1388 | " err: source/sink caps should atleast have vSafe5V", | |
1389 | [PDO_ERR_VSAFE5V_NOT_FIRST] = | |
1390 | " err: vSafe5V Fixed Supply Object Shall always be the first object", | |
1391 | [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] = | |
1392 | " err: PDOs should be in the following order: Fixed; Battery; Variable", | |
1393 | [PDO_ERR_FIXED_NOT_SORTED] = | |
1394 | " err: Fixed supply pdos should be in increasing order of their fixed voltage", | |
1395 | [PDO_ERR_VARIABLE_BATT_NOT_SORTED] = | |
1396 | " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage", | |
1397 | [PDO_ERR_DUPE_PDO] = | |
1398 | " err: Variable/Batt supply pdos cannot have same min/max voltage", | |
2eadc33f AT |
1399 | [PDO_ERR_PPS_APDO_NOT_SORTED] = |
1400 | " err: Programmable power supply apdos should be in increasing order of their maximum voltage", | |
1401 | [PDO_ERR_DUPE_PPS_APDO] = | |
1402 | " err: Programmable power supply apdos cannot have same min/max voltage and max current", | |
5007e1b5 BJS |
1403 | }; |
1404 | ||
1405 | static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo, | |
1406 | unsigned int nr_pdo) | |
1407 | { | |
1408 | unsigned int i; | |
1409 | ||
1410 | /* Should at least contain vSafe5v */ | |
1411 | if (nr_pdo < 1) | |
1412 | return PDO_ERR_NO_VSAFE5V; | |
1413 | ||
1414 | /* The vSafe5V Fixed Supply Object Shall always be the first object */ | |
1415 | if (pdo_type(pdo[0]) != PDO_TYPE_FIXED || | |
1416 | pdo_fixed_voltage(pdo[0]) != VSAFE5V) | |
1417 | return PDO_ERR_VSAFE5V_NOT_FIRST; | |
1418 | ||
1419 | for (i = 1; i < nr_pdo; i++) { | |
1420 | if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) { | |
1421 | return PDO_ERR_PDO_TYPE_NOT_IN_ORDER; | |
1422 | } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) { | |
1423 | enum pd_pdo_type type = pdo_type(pdo[i]); | |
1424 | ||
1425 | switch (type) { | |
1426 | /* | |
1427 | * The remaining Fixed Supply Objects, if | |
1428 | * present, shall be sent in voltage order; | |
1429 | * lowest to highest. | |
1430 | */ | |
1431 | case PDO_TYPE_FIXED: | |
1432 | if (pdo_fixed_voltage(pdo[i]) <= | |
1433 | pdo_fixed_voltage(pdo[i - 1])) | |
1434 | return PDO_ERR_FIXED_NOT_SORTED; | |
1435 | break; | |
1436 | /* | |
1437 | * The Battery Supply Objects and Variable | |
1438 | * supply, if present shall be sent in Minimum | |
1439 | * Voltage order; lowest to highest. | |
1440 | */ | |
1441 | case PDO_TYPE_VAR: | |
1442 | case PDO_TYPE_BATT: | |
1443 | if (pdo_min_voltage(pdo[i]) < | |
1444 | pdo_min_voltage(pdo[i - 1])) | |
1445 | return PDO_ERR_VARIABLE_BATT_NOT_SORTED; | |
1446 | else if ((pdo_min_voltage(pdo[i]) == | |
1447 | pdo_min_voltage(pdo[i - 1])) && | |
1448 | (pdo_max_voltage(pdo[i]) == | |
a684d8fd | 1449 | pdo_max_voltage(pdo[i - 1]))) |
5007e1b5 BJS |
1450 | return PDO_ERR_DUPE_PDO; |
1451 | break; | |
2eadc33f AT |
1452 | /* |
1453 | * The Programmable Power Supply APDOs, if present, | |
1454 | * shall be sent in Maximum Voltage order; | |
1455 | * lowest to highest. | |
1456 | */ | |
1457 | case PDO_TYPE_APDO: | |
1458 | if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS) | |
1459 | break; | |
1460 | ||
1b6af2f5 AT |
1461 | if (pdo_pps_apdo_max_voltage(pdo[i]) < |
1462 | pdo_pps_apdo_max_voltage(pdo[i - 1])) | |
2eadc33f AT |
1463 | return PDO_ERR_PPS_APDO_NOT_SORTED; |
1464 | else if (pdo_pps_apdo_min_voltage(pdo[i]) == | |
1465 | pdo_pps_apdo_min_voltage(pdo[i - 1]) && | |
1466 | pdo_pps_apdo_max_voltage(pdo[i]) == | |
1467 | pdo_pps_apdo_max_voltage(pdo[i - 1]) && | |
1468 | pdo_pps_apdo_max_current(pdo[i]) == | |
1469 | pdo_pps_apdo_max_current(pdo[i - 1])) | |
1470 | return PDO_ERR_DUPE_PPS_APDO; | |
1471 | break; | |
5007e1b5 BJS |
1472 | default: |
1473 | tcpm_log_force(port, " Unknown pdo type"); | |
1474 | } | |
1475 | } | |
1476 | } | |
1477 | ||
1478 | return PDO_NO_ERR; | |
1479 | } | |
1480 | ||
1481 | static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo, | |
1482 | unsigned int nr_pdo) | |
1483 | { | |
1484 | enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo); | |
1485 | ||
1486 | if (err_index != PDO_NO_ERR) { | |
1487 | tcpm_log_force(port, " %s", pdo_err_msg[err_index]); | |
1488 | return -EINVAL; | |
1489 | } | |
1490 | ||
1491 | return 0; | |
1492 | } | |
1493 | ||
e9576fe8 HK |
1494 | static int tcpm_altmode_enter(struct typec_altmode *altmode) |
1495 | { | |
1496 | struct tcpm_port *port = typec_altmode_get_drvdata(altmode); | |
1497 | u32 header; | |
1498 | ||
1499 | mutex_lock(&port->lock); | |
1500 | header = VDO(altmode->svid, 1, CMD_ENTER_MODE); | |
1501 | header |= VDO_OPOS(altmode->mode); | |
1502 | ||
1503 | tcpm_queue_vdm(port, header, NULL, 0); | |
1504 | mod_delayed_work(port->wq, &port->vdm_state_machine, 0); | |
1505 | mutex_unlock(&port->lock); | |
1506 | ||
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | static int tcpm_altmode_exit(struct typec_altmode *altmode) | |
1511 | { | |
1512 | struct tcpm_port *port = typec_altmode_get_drvdata(altmode); | |
1513 | u32 header; | |
1514 | ||
1515 | mutex_lock(&port->lock); | |
1516 | header = VDO(altmode->svid, 1, CMD_EXIT_MODE); | |
1517 | header |= VDO_OPOS(altmode->mode); | |
1518 | ||
1519 | tcpm_queue_vdm(port, header, NULL, 0); | |
1520 | mod_delayed_work(port->wq, &port->vdm_state_machine, 0); | |
1521 | mutex_unlock(&port->lock); | |
1522 | ||
1523 | return 0; | |
1524 | } | |
1525 | ||
1526 | static int tcpm_altmode_vdm(struct typec_altmode *altmode, | |
1527 | u32 header, const u32 *data, int count) | |
1528 | { | |
1529 | struct tcpm_port *port = typec_altmode_get_drvdata(altmode); | |
1530 | ||
1531 | mutex_lock(&port->lock); | |
1532 | tcpm_queue_vdm(port, header, data, count - 1); | |
1533 | mod_delayed_work(port->wq, &port->vdm_state_machine, 0); | |
1534 | mutex_unlock(&port->lock); | |
1535 | ||
1536 | return 0; | |
1537 | } | |
1538 | ||
1539 | static const struct typec_altmode_ops tcpm_altmode_ops = { | |
1540 | .enter = tcpm_altmode_enter, | |
1541 | .exit = tcpm_altmode_exit, | |
1542 | .vdm = tcpm_altmode_vdm, | |
1543 | }; | |
1544 | ||
f0690a25 GR |
1545 | /* |
1546 | * PD (data, control) command handling functions | |
1547 | */ | |
64f7c494 AT |
1548 | static inline enum tcpm_state ready_state(struct tcpm_port *port) |
1549 | { | |
1550 | if (port->pwr_role == TYPEC_SOURCE) | |
1551 | return SRC_READY; | |
1552 | else | |
1553 | return SNK_READY; | |
1554 | } | |
2eadc33f AT |
1555 | |
1556 | static int tcpm_pd_send_control(struct tcpm_port *port, | |
1557 | enum pd_ctrl_msg_type type); | |
1558 | ||
64f7c494 AT |
1559 | static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload, |
1560 | int cnt) | |
1561 | { | |
1562 | u32 p0 = le32_to_cpu(payload[0]); | |
1563 | unsigned int type = usb_pd_ado_type(p0); | |
1564 | ||
1565 | if (!type) { | |
1566 | tcpm_log(port, "Alert message received with no type"); | |
1567 | return; | |
1568 | } | |
1569 | ||
1570 | /* Just handling non-battery alerts for now */ | |
1571 | if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) { | |
1572 | switch (port->state) { | |
1573 | case SRC_READY: | |
1574 | case SNK_READY: | |
1575 | tcpm_set_state(port, GET_STATUS_SEND, 0); | |
1576 | break; | |
1577 | default: | |
1578 | tcpm_queue_message(port, PD_MSG_CTRL_WAIT); | |
1579 | break; | |
1580 | } | |
1581 | } | |
1582 | } | |
1583 | ||
f0690a25 GR |
1584 | static void tcpm_pd_data_request(struct tcpm_port *port, |
1585 | const struct pd_message *msg) | |
1586 | { | |
1587 | enum pd_data_msg_type type = pd_header_type_le(msg->header); | |
1588 | unsigned int cnt = pd_header_cnt_le(msg->header); | |
2eadc33f | 1589 | unsigned int rev = pd_header_rev_le(msg->header); |
f0690a25 GR |
1590 | unsigned int i; |
1591 | ||
1592 | switch (type) { | |
1593 | case PD_DATA_SOURCE_CAP: | |
1594 | if (port->pwr_role != TYPEC_SINK) | |
1595 | break; | |
1596 | ||
1597 | for (i = 0; i < cnt; i++) | |
1598 | port->source_caps[i] = le32_to_cpu(msg->payload[i]); | |
1599 | ||
1600 | port->nr_source_caps = cnt; | |
1601 | ||
1602 | tcpm_log_source_caps(port); | |
1603 | ||
5007e1b5 BJS |
1604 | tcpm_validate_caps(port, port->source_caps, |
1605 | port->nr_source_caps); | |
1606 | ||
2eadc33f AT |
1607 | /* |
1608 | * Adjust revision in subsequent message headers, as required, | |
1609 | * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't | |
1610 | * support Rev 1.0 so just do nothing in that scenario. | |
1611 | */ | |
1612 | if (rev == PD_REV10) | |
1613 | break; | |
1614 | ||
1615 | if (rev < PD_MAX_REV) | |
1616 | port->negotiated_rev = rev; | |
1617 | ||
f0690a25 GR |
1618 | /* |
1619 | * This message may be received even if VBUS is not | |
1620 | * present. This is quite unexpected; see USB PD | |
1621 | * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2. | |
1622 | * However, at the same time, we must be ready to | |
1623 | * receive this message and respond to it 15ms after | |
1624 | * receiving PS_RDY during power swap operations, no matter | |
1625 | * if VBUS is available or not (USB PD specification, | |
1626 | * section 6.5.9.2). | |
1627 | * So we need to accept the message either way, | |
1628 | * but be prepared to keep waiting for VBUS after it was | |
1629 | * handled. | |
1630 | */ | |
1631 | tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); | |
1632 | break; | |
1633 | case PD_DATA_REQUEST: | |
1634 | if (port->pwr_role != TYPEC_SOURCE || | |
1635 | cnt != 1) { | |
1636 | tcpm_queue_message(port, PD_MSG_CTRL_REJECT); | |
1637 | break; | |
1638 | } | |
2eadc33f AT |
1639 | |
1640 | /* | |
1641 | * Adjust revision in subsequent message headers, as required, | |
1642 | * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't | |
1643 | * support Rev 1.0 so just reject in that scenario. | |
1644 | */ | |
1645 | if (rev == PD_REV10) { | |
1646 | tcpm_queue_message(port, PD_MSG_CTRL_REJECT); | |
1647 | break; | |
1648 | } | |
1649 | ||
1650 | if (rev < PD_MAX_REV) | |
1651 | port->negotiated_rev = rev; | |
1652 | ||
f0690a25 GR |
1653 | port->sink_request = le32_to_cpu(msg->payload[0]); |
1654 | tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0); | |
1655 | break; | |
1656 | case PD_DATA_SINK_CAP: | |
1657 | /* We don't do anything with this at the moment... */ | |
1658 | for (i = 0; i < cnt; i++) | |
1659 | port->sink_caps[i] = le32_to_cpu(msg->payload[i]); | |
1660 | port->nr_sink_caps = cnt; | |
1661 | break; | |
1662 | case PD_DATA_VENDOR_DEF: | |
1663 | tcpm_handle_vdm_request(port, msg->payload, cnt); | |
1664 | break; | |
1665 | case PD_DATA_BIST: | |
1666 | if (port->state == SRC_READY || port->state == SNK_READY) { | |
1667 | port->bist_request = le32_to_cpu(msg->payload[0]); | |
1668 | tcpm_set_state(port, BIST_RX, 0); | |
1669 | } | |
1670 | break; | |
64f7c494 AT |
1671 | case PD_DATA_ALERT: |
1672 | tcpm_handle_alert(port, msg->payload, cnt); | |
1673 | break; | |
1674 | case PD_DATA_BATT_STATUS: | |
1675 | case PD_DATA_GET_COUNTRY_INFO: | |
1676 | /* Currently unsupported */ | |
1677 | tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); | |
1678 | break; | |
f0690a25 GR |
1679 | default: |
1680 | tcpm_log(port, "Unhandled data message type %#x", type); | |
1681 | break; | |
1682 | } | |
1683 | } | |
1684 | ||
2eadc33f AT |
1685 | static void tcpm_pps_complete(struct tcpm_port *port, int result) |
1686 | { | |
1687 | if (port->pps_pending) { | |
1688 | port->pps_status = result; | |
1689 | port->pps_pending = false; | |
1690 | complete(&port->pps_complete); | |
1691 | } | |
1692 | } | |
1693 | ||
f0690a25 GR |
1694 | static void tcpm_pd_ctrl_request(struct tcpm_port *port, |
1695 | const struct pd_message *msg) | |
1696 | { | |
1697 | enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); | |
1698 | enum tcpm_state next_state; | |
1699 | ||
1700 | switch (type) { | |
1701 | case PD_CTRL_GOOD_CRC: | |
1702 | case PD_CTRL_PING: | |
1703 | break; | |
1704 | case PD_CTRL_GET_SOURCE_CAP: | |
1705 | switch (port->state) { | |
1706 | case SRC_READY: | |
1707 | case SNK_READY: | |
1708 | tcpm_queue_message(port, PD_MSG_DATA_SOURCE_CAP); | |
1709 | break; | |
1710 | default: | |
1711 | tcpm_queue_message(port, PD_MSG_CTRL_REJECT); | |
1712 | break; | |
1713 | } | |
1714 | break; | |
1715 | case PD_CTRL_GET_SINK_CAP: | |
1716 | switch (port->state) { | |
1717 | case SRC_READY: | |
1718 | case SNK_READY: | |
1719 | tcpm_queue_message(port, PD_MSG_DATA_SINK_CAP); | |
1720 | break; | |
1721 | default: | |
1722 | tcpm_queue_message(port, PD_MSG_CTRL_REJECT); | |
1723 | break; | |
1724 | } | |
1725 | break; | |
1726 | case PD_CTRL_GOTO_MIN: | |
1727 | break; | |
1728 | case PD_CTRL_PS_RDY: | |
1729 | switch (port->state) { | |
1730 | case SNK_TRANSITION_SINK: | |
1731 | if (port->vbus_present) { | |
1732 | tcpm_set_current_limit(port, | |
1733 | port->current_limit, | |
1734 | port->supply_voltage); | |
8bf05746 | 1735 | port->explicit_contract = true; |
f0690a25 GR |
1736 | tcpm_set_state(port, SNK_READY, 0); |
1737 | } else { | |
1738 | /* | |
1739 | * Seen after power swap. Keep waiting for VBUS | |
1740 | * in a transitional state. | |
1741 | */ | |
1742 | tcpm_set_state(port, | |
1743 | SNK_TRANSITION_SINK_VBUS, 0); | |
1744 | } | |
1745 | break; | |
b965b631 | 1746 | case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: |
f0690a25 GR |
1747 | tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0); |
1748 | break; | |
1749 | case PR_SWAP_SNK_SRC_SINK_OFF: | |
1750 | tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0); | |
1751 | break; | |
1752 | case VCONN_SWAP_WAIT_FOR_VCONN: | |
1753 | tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0); | |
1754 | break; | |
1755 | default: | |
1756 | break; | |
1757 | } | |
1758 | break; | |
1759 | case PD_CTRL_REJECT: | |
1760 | case PD_CTRL_WAIT: | |
64f7c494 | 1761 | case PD_CTRL_NOT_SUPP: |
f0690a25 GR |
1762 | switch (port->state) { |
1763 | case SNK_NEGOTIATE_CAPABILITIES: | |
1764 | /* USB PD specification, Figure 8-43 */ | |
1765 | if (port->explicit_contract) | |
1766 | next_state = SNK_READY; | |
1767 | else | |
1768 | next_state = SNK_WAIT_CAPABILITIES; | |
1769 | tcpm_set_state(port, next_state, 0); | |
1770 | break; | |
2eadc33f AT |
1771 | case SNK_NEGOTIATE_PPS_CAPABILITIES: |
1772 | /* Revert data back from any requested PPS updates */ | |
1773 | port->pps_data.out_volt = port->supply_voltage; | |
1774 | port->pps_data.op_curr = port->current_limit; | |
1775 | port->pps_status = (type == PD_CTRL_WAIT ? | |
1776 | -EAGAIN : -EOPNOTSUPP); | |
1777 | tcpm_set_state(port, SNK_READY, 0); | |
1778 | break; | |
f0690a25 GR |
1779 | case DR_SWAP_SEND: |
1780 | port->swap_status = (type == PD_CTRL_WAIT ? | |
1781 | -EAGAIN : -EOPNOTSUPP); | |
1782 | tcpm_set_state(port, DR_SWAP_CANCEL, 0); | |
1783 | break; | |
1784 | case PR_SWAP_SEND: | |
1785 | port->swap_status = (type == PD_CTRL_WAIT ? | |
1786 | -EAGAIN : -EOPNOTSUPP); | |
1787 | tcpm_set_state(port, PR_SWAP_CANCEL, 0); | |
1788 | break; | |
1789 | case VCONN_SWAP_SEND: | |
1790 | port->swap_status = (type == PD_CTRL_WAIT ? | |
1791 | -EAGAIN : -EOPNOTSUPP); | |
1792 | tcpm_set_state(port, VCONN_SWAP_CANCEL, 0); | |
1793 | break; | |
1794 | default: | |
1795 | break; | |
1796 | } | |
1797 | break; | |
1798 | case PD_CTRL_ACCEPT: | |
1799 | switch (port->state) { | |
1800 | case SNK_NEGOTIATE_CAPABILITIES: | |
2eadc33f AT |
1801 | port->pps_data.active = false; |
1802 | tcpm_set_state(port, SNK_TRANSITION_SINK, 0); | |
1803 | break; | |
1804 | case SNK_NEGOTIATE_PPS_CAPABILITIES: | |
1805 | port->pps_data.active = true; | |
1806 | port->supply_voltage = port->pps_data.out_volt; | |
1807 | port->current_limit = port->pps_data.op_curr; | |
f0690a25 GR |
1808 | tcpm_set_state(port, SNK_TRANSITION_SINK, 0); |
1809 | break; | |
1810 | case SOFT_RESET_SEND: | |
1811 | port->message_id = 0; | |
5fec4b54 | 1812 | port->rx_msgid = -1; |
f0690a25 GR |
1813 | if (port->pwr_role == TYPEC_SOURCE) |
1814 | next_state = SRC_SEND_CAPABILITIES; | |
1815 | else | |
1816 | next_state = SNK_WAIT_CAPABILITIES; | |
1817 | tcpm_set_state(port, next_state, 0); | |
1818 | break; | |
1819 | case DR_SWAP_SEND: | |
1820 | tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0); | |
1821 | break; | |
1822 | case PR_SWAP_SEND: | |
1823 | tcpm_set_state(port, PR_SWAP_START, 0); | |
1824 | break; | |
1825 | case VCONN_SWAP_SEND: | |
1826 | tcpm_set_state(port, VCONN_SWAP_START, 0); | |
1827 | break; | |
1828 | default: | |
1829 | break; | |
1830 | } | |
1831 | break; | |
1832 | case PD_CTRL_SOFT_RESET: | |
1833 | tcpm_set_state(port, SOFT_RESET, 0); | |
1834 | break; | |
1835 | case PD_CTRL_DR_SWAP: | |
9b0ae699 | 1836 | if (port->port_type != TYPEC_PORT_DRP) { |
f0690a25 GR |
1837 | tcpm_queue_message(port, PD_MSG_CTRL_REJECT); |
1838 | break; | |
1839 | } | |
1840 | /* | |
1841 | * XXX | |
1842 | * 6.3.9: If an alternate mode is active, a request to swap | |
1843 | * alternate modes shall trigger a port reset. | |
1844 | */ | |
1845 | switch (port->state) { | |
1846 | case SRC_READY: | |
1847 | case SNK_READY: | |
1848 | tcpm_set_state(port, DR_SWAP_ACCEPT, 0); | |
1849 | break; | |
1850 | default: | |
1851 | tcpm_queue_message(port, PD_MSG_CTRL_WAIT); | |
1852 | break; | |
1853 | } | |
1854 | break; | |
1855 | case PD_CTRL_PR_SWAP: | |
9b0ae699 | 1856 | if (port->port_type != TYPEC_PORT_DRP) { |
f0690a25 GR |
1857 | tcpm_queue_message(port, PD_MSG_CTRL_REJECT); |
1858 | break; | |
1859 | } | |
1860 | switch (port->state) { | |
1861 | case SRC_READY: | |
1862 | case SNK_READY: | |
1863 | tcpm_set_state(port, PR_SWAP_ACCEPT, 0); | |
1864 | break; | |
1865 | default: | |
1866 | tcpm_queue_message(port, PD_MSG_CTRL_WAIT); | |
1867 | break; | |
1868 | } | |
1869 | break; | |
1870 | case PD_CTRL_VCONN_SWAP: | |
1871 | switch (port->state) { | |
1872 | case SRC_READY: | |
1873 | case SNK_READY: | |
1874 | tcpm_set_state(port, VCONN_SWAP_ACCEPT, 0); | |
1875 | break; | |
1876 | default: | |
1877 | tcpm_queue_message(port, PD_MSG_CTRL_WAIT); | |
1878 | break; | |
1879 | } | |
1880 | break; | |
64f7c494 AT |
1881 | case PD_CTRL_GET_SOURCE_CAP_EXT: |
1882 | case PD_CTRL_GET_STATUS: | |
1883 | case PD_CTRL_FR_SWAP: | |
1884 | case PD_CTRL_GET_PPS_STATUS: | |
1885 | case PD_CTRL_GET_COUNTRY_CODES: | |
1886 | /* Currently not supported */ | |
1887 | tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); | |
1888 | break; | |
f0690a25 GR |
1889 | default: |
1890 | tcpm_log(port, "Unhandled ctrl message type %#x", type); | |
1891 | break; | |
1892 | } | |
1893 | } | |
1894 | ||
64f7c494 AT |
1895 | static void tcpm_pd_ext_msg_request(struct tcpm_port *port, |
1896 | const struct pd_message *msg) | |
1897 | { | |
1898 | enum pd_ext_msg_type type = pd_header_type_le(msg->header); | |
1899 | unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header); | |
1900 | ||
25242703 | 1901 | if (!(msg->ext_msg.header & PD_EXT_HDR_CHUNKED)) { |
64f7c494 AT |
1902 | tcpm_log(port, "Unchunked extended messages unsupported"); |
1903 | return; | |
1904 | } | |
1905 | ||
1906 | if (data_size > PD_EXT_MAX_CHUNK_DATA) { | |
1907 | tcpm_log(port, "Chunk handling not yet supported"); | |
1908 | return; | |
1909 | } | |
1910 | ||
1911 | switch (type) { | |
1912 | case PD_EXT_STATUS: | |
1913 | /* | |
1914 | * If PPS related events raised then get PPS status to clear | |
1915 | * (see USB PD 3.0 Spec, 6.5.2.4) | |
1916 | */ | |
1917 | if (msg->ext_msg.data[USB_PD_EXT_SDB_EVENT_FLAGS] & | |
1918 | USB_PD_EXT_SDB_PPS_EVENTS) | |
1919 | tcpm_set_state(port, GET_PPS_STATUS_SEND, 0); | |
1920 | else | |
1921 | tcpm_set_state(port, ready_state(port), 0); | |
1922 | break; | |
1923 | case PD_EXT_PPS_STATUS: | |
1924 | /* | |
1925 | * For now the PPS status message is used to clear events | |
1926 | * and nothing more. | |
1927 | */ | |
1928 | tcpm_set_state(port, ready_state(port), 0); | |
1929 | break; | |
1930 | case PD_EXT_SOURCE_CAP_EXT: | |
1931 | case PD_EXT_GET_BATT_CAP: | |
1932 | case PD_EXT_GET_BATT_STATUS: | |
1933 | case PD_EXT_BATT_CAP: | |
1934 | case PD_EXT_GET_MANUFACTURER_INFO: | |
1935 | case PD_EXT_MANUFACTURER_INFO: | |
1936 | case PD_EXT_SECURITY_REQUEST: | |
1937 | case PD_EXT_SECURITY_RESPONSE: | |
1938 | case PD_EXT_FW_UPDATE_REQUEST: | |
1939 | case PD_EXT_FW_UPDATE_RESPONSE: | |
1940 | case PD_EXT_COUNTRY_INFO: | |
1941 | case PD_EXT_COUNTRY_CODES: | |
1942 | tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP); | |
1943 | break; | |
1944 | default: | |
1945 | tcpm_log(port, "Unhandled extended message type %#x", type); | |
1946 | break; | |
1947 | } | |
1948 | } | |
1949 | ||
f0690a25 GR |
1950 | static void tcpm_pd_rx_handler(struct work_struct *work) |
1951 | { | |
1952 | struct pd_rx_event *event = container_of(work, | |
1953 | struct pd_rx_event, work); | |
1954 | const struct pd_message *msg = &event->msg; | |
1955 | unsigned int cnt = pd_header_cnt_le(msg->header); | |
1956 | struct tcpm_port *port = event->port; | |
1957 | ||
1958 | mutex_lock(&port->lock); | |
1959 | ||
1960 | tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header), | |
1961 | port->attached); | |
1962 | ||
1963 | if (port->attached) { | |
5fec4b54 GR |
1964 | enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); |
1965 | unsigned int msgid = pd_header_msgid_le(msg->header); | |
1966 | ||
1967 | /* | |
1968 | * USB PD standard, 6.6.1.2: | |
1969 | * "... if MessageID value in a received Message is the | |
1970 | * same as the stored value, the receiver shall return a | |
1971 | * GoodCRC Message with that MessageID value and drop | |
1972 | * the Message (this is a retry of an already received | |
1973 | * Message). Note: this shall not apply to the Soft_Reset | |
1974 | * Message which always has a MessageID value of zero." | |
1975 | */ | |
1976 | if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET) | |
1977 | goto done; | |
1978 | port->rx_msgid = msgid; | |
1979 | ||
f0690a25 GR |
1980 | /* |
1981 | * If both ends believe to be DFP/host, we have a data role | |
1982 | * mismatch. | |
1983 | */ | |
1984 | if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) == | |
1985 | (port->data_role == TYPEC_HOST)) { | |
1986 | tcpm_log(port, | |
1987 | "Data role mismatch, initiating error recovery"); | |
1988 | tcpm_set_state(port, ERROR_RECOVERY, 0); | |
1989 | } else { | |
64f7c494 AT |
1990 | if (msg->header & PD_HEADER_EXT_HDR) |
1991 | tcpm_pd_ext_msg_request(port, msg); | |
1992 | else if (cnt) | |
f0690a25 GR |
1993 | tcpm_pd_data_request(port, msg); |
1994 | else | |
1995 | tcpm_pd_ctrl_request(port, msg); | |
1996 | } | |
1997 | } | |
1998 | ||
5fec4b54 | 1999 | done: |
f0690a25 GR |
2000 | mutex_unlock(&port->lock); |
2001 | kfree(event); | |
2002 | } | |
2003 | ||
2004 | void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg) | |
2005 | { | |
2006 | struct pd_rx_event *event; | |
2007 | ||
2008 | event = kzalloc(sizeof(*event), GFP_ATOMIC); | |
2009 | if (!event) | |
2010 | return; | |
2011 | ||
2012 | INIT_WORK(&event->work, tcpm_pd_rx_handler); | |
2013 | event->port = port; | |
2014 | memcpy(&event->msg, msg, sizeof(*msg)); | |
2015 | queue_work(port->wq, &event->work); | |
2016 | } | |
2017 | EXPORT_SYMBOL_GPL(tcpm_pd_receive); | |
2018 | ||
2019 | static int tcpm_pd_send_control(struct tcpm_port *port, | |
2020 | enum pd_ctrl_msg_type type) | |
2021 | { | |
2022 | struct pd_message msg; | |
2023 | ||
2024 | memset(&msg, 0, sizeof(msg)); | |
2025 | msg.header = PD_HEADER_LE(type, port->pwr_role, | |
2026 | port->data_role, | |
2eadc33f | 2027 | port->negotiated_rev, |
f0690a25 GR |
2028 | port->message_id, 0); |
2029 | ||
2030 | return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); | |
2031 | } | |
2032 | ||
2033 | /* | |
2034 | * Send queued message without affecting state. | |
2035 | * Return true if state machine should go back to sleep, | |
2036 | * false otherwise. | |
2037 | */ | |
2038 | static bool tcpm_send_queued_message(struct tcpm_port *port) | |
2039 | { | |
2040 | enum pd_msg_request queued_message; | |
2041 | ||
2042 | do { | |
2043 | queued_message = port->queued_message; | |
2044 | port->queued_message = PD_MSG_NONE; | |
2045 | ||
2046 | switch (queued_message) { | |
2047 | case PD_MSG_CTRL_WAIT: | |
2048 | tcpm_pd_send_control(port, PD_CTRL_WAIT); | |
2049 | break; | |
2050 | case PD_MSG_CTRL_REJECT: | |
2051 | tcpm_pd_send_control(port, PD_CTRL_REJECT); | |
2052 | break; | |
64f7c494 AT |
2053 | case PD_MSG_CTRL_NOT_SUPP: |
2054 | tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP); | |
2055 | break; | |
f0690a25 GR |
2056 | case PD_MSG_DATA_SINK_CAP: |
2057 | tcpm_pd_send_sink_caps(port); | |
2058 | break; | |
2059 | case PD_MSG_DATA_SOURCE_CAP: | |
2060 | tcpm_pd_send_source_caps(port); | |
2061 | break; | |
2062 | default: | |
2063 | break; | |
2064 | } | |
2065 | } while (port->queued_message != PD_MSG_NONE); | |
2066 | ||
2067 | if (port->delayed_state != INVALID_STATE) { | |
2068 | if (time_is_after_jiffies(port->delayed_runtime)) { | |
2069 | mod_delayed_work(port->wq, &port->state_machine, | |
2070 | port->delayed_runtime - jiffies); | |
2071 | return true; | |
2072 | } | |
2073 | port->delayed_state = INVALID_STATE; | |
2074 | } | |
2075 | return false; | |
2076 | } | |
2077 | ||
2078 | static int tcpm_pd_check_request(struct tcpm_port *port) | |
2079 | { | |
2080 | u32 pdo, rdo = port->sink_request; | |
2081 | unsigned int max, op, pdo_max, index; | |
2082 | enum pd_pdo_type type; | |
2083 | ||
2084 | index = rdo_index(rdo); | |
2085 | if (!index || index > port->nr_src_pdo) | |
2086 | return -EINVAL; | |
2087 | ||
2088 | pdo = port->src_pdo[index - 1]; | |
2089 | type = pdo_type(pdo); | |
2090 | switch (type) { | |
2091 | case PDO_TYPE_FIXED: | |
2092 | case PDO_TYPE_VAR: | |
2093 | max = rdo_max_current(rdo); | |
2094 | op = rdo_op_current(rdo); | |
2095 | pdo_max = pdo_max_current(pdo); | |
2096 | ||
2097 | if (op > pdo_max) | |
2098 | return -EINVAL; | |
2099 | if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH)) | |
2100 | return -EINVAL; | |
2101 | ||
2102 | if (type == PDO_TYPE_FIXED) | |
2103 | tcpm_log(port, | |
2104 | "Requested %u mV, %u mA for %u / %u mA", | |
2105 | pdo_fixed_voltage(pdo), pdo_max, op, max); | |
2106 | else | |
2107 | tcpm_log(port, | |
2108 | "Requested %u -> %u mV, %u mA for %u / %u mA", | |
2109 | pdo_min_voltage(pdo), pdo_max_voltage(pdo), | |
2110 | pdo_max, op, max); | |
2111 | break; | |
2112 | case PDO_TYPE_BATT: | |
2113 | max = rdo_max_power(rdo); | |
2114 | op = rdo_op_power(rdo); | |
2115 | pdo_max = pdo_max_power(pdo); | |
2116 | ||
2117 | if (op > pdo_max) | |
2118 | return -EINVAL; | |
2119 | if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH)) | |
2120 | return -EINVAL; | |
2121 | tcpm_log(port, | |
2122 | "Requested %u -> %u mV, %u mW for %u / %u mW", | |
2123 | pdo_min_voltage(pdo), pdo_max_voltage(pdo), | |
2124 | pdo_max, op, max); | |
2125 | break; | |
2126 | default: | |
2127 | return -EINVAL; | |
2128 | } | |
2129 | ||
2130 | port->op_vsafe5v = index == 1; | |
2131 | ||
2132 | return 0; | |
2133 | } | |
2134 | ||
53fe0de9 LJ |
2135 | #define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y)) |
2136 | #define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y)) | |
2137 | ||
2138 | static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo, | |
2139 | int *src_pdo) | |
f0690a25 | 2140 | { |
53fe0de9 LJ |
2141 | unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0, |
2142 | max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0, | |
2143 | min_snk_mv = 0; | |
f0690a25 GR |
2144 | int ret = -EINVAL; |
2145 | ||
2eadc33f | 2146 | port->pps_data.supported = false; |
f2a8aa05 | 2147 | port->usb_type = POWER_SUPPLY_USB_TYPE_PD; |
2eadc33f | 2148 | |
f0690a25 | 2149 | /* |
53fe0de9 LJ |
2150 | * Select the source PDO providing the most power which has a |
2151 | * matchig sink cap. | |
f0690a25 GR |
2152 | */ |
2153 | for (i = 0; i < port->nr_source_caps; i++) { | |
2154 | u32 pdo = port->source_caps[i]; | |
2155 | enum pd_pdo_type type = pdo_type(pdo); | |
f0690a25 | 2156 | |
2eadc33f AT |
2157 | switch (type) { |
2158 | case PDO_TYPE_FIXED: | |
53fe0de9 LJ |
2159 | max_src_mv = pdo_fixed_voltage(pdo); |
2160 | min_src_mv = max_src_mv; | |
2eadc33f AT |
2161 | break; |
2162 | case PDO_TYPE_BATT: | |
2163 | case PDO_TYPE_VAR: | |
53fe0de9 LJ |
2164 | max_src_mv = pdo_max_voltage(pdo); |
2165 | min_src_mv = pdo_min_voltage(pdo); | |
2eadc33f AT |
2166 | break; |
2167 | case PDO_TYPE_APDO: | |
f2a8aa05 | 2168 | if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) { |
2eadc33f | 2169 | port->pps_data.supported = true; |
f2a8aa05 AT |
2170 | port->usb_type = |
2171 | POWER_SUPPLY_USB_TYPE_PD_PPS; | |
2172 | } | |
2eadc33f AT |
2173 | continue; |
2174 | default: | |
2175 | tcpm_log(port, "Invalid source PDO type, ignoring"); | |
2176 | continue; | |
53fe0de9 | 2177 | } |
6f566af3 | 2178 | |
2eadc33f AT |
2179 | switch (type) { |
2180 | case PDO_TYPE_FIXED: | |
2181 | case PDO_TYPE_VAR: | |
53fe0de9 LJ |
2182 | src_ma = pdo_max_current(pdo); |
2183 | src_mw = src_ma * min_src_mv / 1000; | |
2eadc33f AT |
2184 | break; |
2185 | case PDO_TYPE_BATT: | |
2186 | src_mw = pdo_max_power(pdo); | |
2187 | break; | |
2188 | case PDO_TYPE_APDO: | |
2189 | continue; | |
2190 | default: | |
2191 | tcpm_log(port, "Invalid source PDO type, ignoring"); | |
2192 | continue; | |
6f566af3 HG |
2193 | } |
2194 | ||
53fe0de9 LJ |
2195 | for (j = 0; j < port->nr_snk_pdo; j++) { |
2196 | pdo = port->snk_pdo[j]; | |
2197 | ||
2eadc33f AT |
2198 | switch (pdo_type(pdo)) { |
2199 | case PDO_TYPE_FIXED: | |
53fe0de9 | 2200 | max_snk_mv = pdo_fixed_voltage(pdo); |
2eadc33f AT |
2201 | min_snk_mv = max_snk_mv; |
2202 | break; | |
2203 | case PDO_TYPE_BATT: | |
2204 | case PDO_TYPE_VAR: | |
53fe0de9 | 2205 | max_snk_mv = pdo_max_voltage(pdo); |
2eadc33f AT |
2206 | min_snk_mv = pdo_min_voltage(pdo); |
2207 | break; | |
2208 | case PDO_TYPE_APDO: | |
2209 | continue; | |
2210 | default: | |
2211 | tcpm_log(port, "Invalid sink PDO type, ignoring"); | |
2212 | continue; | |
53fe0de9 LJ |
2213 | } |
2214 | ||
2215 | if (max_src_mv <= max_snk_mv && | |
2216 | min_src_mv >= min_snk_mv) { | |
2217 | /* Prefer higher voltages if available */ | |
2218 | if ((src_mw == max_mw && min_src_mv > max_mv) || | |
2219 | src_mw > max_mw) { | |
2220 | *src_pdo = i; | |
2221 | *sink_pdo = j; | |
2222 | max_mw = src_mw; | |
2223 | max_mv = min_src_mv; | |
2224 | ret = 0; | |
2225 | } | |
2226 | } | |
f0690a25 GR |
2227 | } |
2228 | } | |
2229 | ||
2230 | return ret; | |
2231 | } | |
2232 | ||
2eadc33f AT |
2233 | #define min_pps_apdo_current(x, y) \ |
2234 | min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y)) | |
2235 | ||
2236 | static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port) | |
2237 | { | |
2238 | unsigned int i, j, max_mw = 0, max_mv = 0; | |
2239 | unsigned int min_src_mv, max_src_mv, src_ma, src_mw; | |
8e4657c6 | 2240 | unsigned int min_snk_mv, max_snk_mv; |
c710d0bb KT |
2241 | unsigned int max_op_mv; |
2242 | u32 pdo, src, snk; | |
2eadc33f AT |
2243 | unsigned int src_pdo = 0, snk_pdo = 0; |
2244 | ||
2245 | /* | |
2246 | * Select the source PPS APDO providing the most power while staying | |
2247 | * within the board's limits. We skip the first PDO as this is always | |
2248 | * 5V 3A. | |
2249 | */ | |
2250 | for (i = 1; i < port->nr_source_caps; ++i) { | |
2251 | pdo = port->source_caps[i]; | |
2252 | ||
2253 | switch (pdo_type(pdo)) { | |
2254 | case PDO_TYPE_APDO: | |
2255 | if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { | |
2256 | tcpm_log(port, "Not PPS APDO (source), ignoring"); | |
2257 | continue; | |
2258 | } | |
2259 | ||
2260 | min_src_mv = pdo_pps_apdo_min_voltage(pdo); | |
2261 | max_src_mv = pdo_pps_apdo_max_voltage(pdo); | |
2262 | src_ma = pdo_pps_apdo_max_current(pdo); | |
2263 | src_mw = (src_ma * max_src_mv) / 1000; | |
2264 | ||
2265 | /* | |
2266 | * Now search through the sink PDOs to find a matching | |
2267 | * PPS APDO. Again skip the first sink PDO as this will | |
2268 | * always be 5V 3A. | |
2269 | */ | |
c413767e | 2270 | for (j = 1; j < port->nr_snk_pdo; j++) { |
2eadc33f AT |
2271 | pdo = port->snk_pdo[j]; |
2272 | ||
2273 | switch (pdo_type(pdo)) { | |
2274 | case PDO_TYPE_APDO: | |
2275 | if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { | |
2276 | tcpm_log(port, | |
2277 | "Not PPS APDO (sink), ignoring"); | |
2278 | continue; | |
2279 | } | |
2280 | ||
2281 | min_snk_mv = | |
2282 | pdo_pps_apdo_min_voltage(pdo); | |
2283 | max_snk_mv = | |
2284 | pdo_pps_apdo_max_voltage(pdo); | |
2eadc33f AT |
2285 | break; |
2286 | default: | |
2287 | tcpm_log(port, | |
2288 | "Not APDO type (sink), ignoring"); | |
2289 | continue; | |
2290 | } | |
2291 | ||
c710d0bb KT |
2292 | if (min_src_mv <= max_snk_mv && |
2293 | max_src_mv >= min_snk_mv) { | |
2294 | max_op_mv = min(max_src_mv, max_snk_mv); | |
2295 | src_mw = (max_op_mv * src_ma) / 1000; | |
2eadc33f AT |
2296 | /* Prefer higher voltages if available */ |
2297 | if ((src_mw == max_mw && | |
c710d0bb | 2298 | max_op_mv > max_mv) || |
2eadc33f AT |
2299 | src_mw > max_mw) { |
2300 | src_pdo = i; | |
2301 | snk_pdo = j; | |
2302 | max_mw = src_mw; | |
c710d0bb | 2303 | max_mv = max_op_mv; |
2eadc33f AT |
2304 | } |
2305 | } | |
2306 | } | |
2307 | ||
2308 | break; | |
2309 | default: | |
2310 | tcpm_log(port, "Not APDO type (source), ignoring"); | |
2311 | continue; | |
2312 | } | |
2313 | } | |
2314 | ||
2315 | if (src_pdo) { | |
c710d0bb KT |
2316 | src = port->source_caps[src_pdo]; |
2317 | snk = port->snk_pdo[snk_pdo]; | |
2318 | ||
2319 | port->pps_data.min_volt = max(pdo_pps_apdo_min_voltage(src), | |
2320 | pdo_pps_apdo_min_voltage(snk)); | |
2321 | port->pps_data.max_volt = min(pdo_pps_apdo_max_voltage(src), | |
2322 | pdo_pps_apdo_max_voltage(snk)); | |
2323 | port->pps_data.max_curr = min_pps_apdo_current(src, snk); | |
2324 | port->pps_data.out_volt = min(port->pps_data.max_volt, | |
a07ddce4 KT |
2325 | max(port->pps_data.min_volt, |
2326 | port->pps_data.out_volt)); | |
c710d0bb KT |
2327 | port->pps_data.op_curr = min(port->pps_data.max_curr, |
2328 | port->pps_data.op_curr); | |
2eadc33f AT |
2329 | } |
2330 | ||
2331 | return src_pdo; | |
2332 | } | |
2333 | ||
f0690a25 GR |
2334 | static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) |
2335 | { | |
2336 | unsigned int mv, ma, mw, flags; | |
2337 | unsigned int max_ma, max_mw; | |
2338 | enum pd_pdo_type type; | |
53fe0de9 | 2339 | u32 pdo, matching_snk_pdo; |
0c718676 GKH |
2340 | int src_pdo_index = 0; |
2341 | int snk_pdo_index = 0; | |
53fe0de9 | 2342 | int ret; |
f0690a25 | 2343 | |
53fe0de9 LJ |
2344 | ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index); |
2345 | if (ret < 0) | |
2346 | return ret; | |
2347 | ||
2348 | pdo = port->source_caps[src_pdo_index]; | |
2349 | matching_snk_pdo = port->snk_pdo[snk_pdo_index]; | |
f0690a25 GR |
2350 | type = pdo_type(pdo); |
2351 | ||
2eadc33f AT |
2352 | switch (type) { |
2353 | case PDO_TYPE_FIXED: | |
f0690a25 | 2354 | mv = pdo_fixed_voltage(pdo); |
2eadc33f AT |
2355 | break; |
2356 | case PDO_TYPE_BATT: | |
2357 | case PDO_TYPE_VAR: | |
f0690a25 | 2358 | mv = pdo_min_voltage(pdo); |
2eadc33f AT |
2359 | break; |
2360 | default: | |
2361 | tcpm_log(port, "Invalid PDO selected!"); | |
2362 | return -EINVAL; | |
2363 | } | |
f0690a25 | 2364 | |
53fe0de9 | 2365 | /* Select maximum available current within the sink pdo's limit */ |
f0690a25 | 2366 | if (type == PDO_TYPE_BATT) { |
53fe0de9 LJ |
2367 | mw = min_power(pdo, matching_snk_pdo); |
2368 | ma = 1000 * mw / mv; | |
f0690a25 | 2369 | } else { |
53fe0de9 LJ |
2370 | ma = min_current(pdo, matching_snk_pdo); |
2371 | mw = ma * mv / 1000; | |
f0690a25 | 2372 | } |
f0690a25 | 2373 | |
931693f9 | 2374 | flags = RDO_USB_COMM | RDO_NO_SUSPEND; |
f0690a25 GR |
2375 | |
2376 | /* Set mismatch bit if offered power is less than operating power */ | |
f0690a25 GR |
2377 | max_ma = ma; |
2378 | max_mw = mw; | |
2379 | if (mw < port->operating_snk_mw) { | |
2380 | flags |= RDO_CAP_MISMATCH; | |
53fe0de9 LJ |
2381 | if (type == PDO_TYPE_BATT && |
2382 | (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo))) | |
2383 | max_mw = pdo_max_power(matching_snk_pdo); | |
2384 | else if (pdo_max_current(matching_snk_pdo) > | |
2385 | pdo_max_current(pdo)) | |
2386 | max_ma = pdo_max_current(matching_snk_pdo); | |
f0690a25 GR |
2387 | } |
2388 | ||
2389 | tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d", | |
2390 | port->cc_req, port->cc1, port->cc2, port->vbus_source, | |
2391 | port->vconn_role == TYPEC_SOURCE ? "source" : "sink", | |
2392 | port->polarity); | |
2393 | ||
2394 | if (type == PDO_TYPE_BATT) { | |
53fe0de9 | 2395 | *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags); |
f0690a25 GR |
2396 | |
2397 | tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s", | |
53fe0de9 | 2398 | src_pdo_index, mv, mw, |
f0690a25 GR |
2399 | flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); |
2400 | } else { | |
53fe0de9 | 2401 | *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags); |
f0690a25 GR |
2402 | |
2403 | tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s", | |
53fe0de9 | 2404 | src_pdo_index, mv, ma, |
f0690a25 GR |
2405 | flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); |
2406 | } | |
2407 | ||
2408 | port->current_limit = ma; | |
2409 | port->supply_voltage = mv; | |
2410 | ||
2411 | return 0; | |
2412 | } | |
2413 | ||
2414 | static int tcpm_pd_send_request(struct tcpm_port *port) | |
2415 | { | |
2416 | struct pd_message msg; | |
2417 | int ret; | |
2418 | u32 rdo; | |
2419 | ||
2420 | ret = tcpm_pd_build_request(port, &rdo); | |
2421 | if (ret < 0) | |
2422 | return ret; | |
2423 | ||
2424 | memset(&msg, 0, sizeof(msg)); | |
2425 | msg.header = PD_HEADER_LE(PD_DATA_REQUEST, | |
2426 | port->pwr_role, | |
2427 | port->data_role, | |
2eadc33f AT |
2428 | port->negotiated_rev, |
2429 | port->message_id, 1); | |
2430 | msg.payload[0] = cpu_to_le32(rdo); | |
2431 | ||
2432 | return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); | |
2433 | } | |
2434 | ||
2435 | static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo) | |
2436 | { | |
8e4657c6 | 2437 | unsigned int out_mv, op_ma, op_mw, max_mv, max_ma, flags; |
2eadc33f AT |
2438 | enum pd_pdo_type type; |
2439 | unsigned int src_pdo_index; | |
2440 | u32 pdo; | |
2441 | ||
2442 | src_pdo_index = tcpm_pd_select_pps_apdo(port); | |
2443 | if (!src_pdo_index) | |
2444 | return -EOPNOTSUPP; | |
2445 | ||
2446 | pdo = port->source_caps[src_pdo_index]; | |
2447 | type = pdo_type(pdo); | |
2448 | ||
2449 | switch (type) { | |
2450 | case PDO_TYPE_APDO: | |
2451 | if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) { | |
2452 | tcpm_log(port, "Invalid APDO selected!"); | |
2453 | return -EINVAL; | |
2454 | } | |
2eadc33f AT |
2455 | max_mv = port->pps_data.max_volt; |
2456 | max_ma = port->pps_data.max_curr; | |
2457 | out_mv = port->pps_data.out_volt; | |
2458 | op_ma = port->pps_data.op_curr; | |
2459 | break; | |
2460 | default: | |
2461 | tcpm_log(port, "Invalid PDO selected!"); | |
2462 | return -EINVAL; | |
2463 | } | |
2464 | ||
2465 | flags = RDO_USB_COMM | RDO_NO_SUSPEND; | |
2466 | ||
2467 | op_mw = (op_ma * out_mv) / 1000; | |
2468 | if (op_mw < port->operating_snk_mw) { | |
2469 | /* | |
2470 | * Try raising current to meet power needs. If that's not enough | |
2471 | * then try upping the voltage. If that's still not enough | |
2472 | * then we've obviously chosen a PPS APDO which really isn't | |
2473 | * suitable so abandon ship. | |
2474 | */ | |
2475 | op_ma = (port->operating_snk_mw * 1000) / out_mv; | |
2476 | if ((port->operating_snk_mw * 1000) % out_mv) | |
2477 | ++op_ma; | |
2478 | op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP); | |
2479 | ||
2480 | if (op_ma > max_ma) { | |
2481 | op_ma = max_ma; | |
2482 | out_mv = (port->operating_snk_mw * 1000) / op_ma; | |
2483 | if ((port->operating_snk_mw * 1000) % op_ma) | |
2484 | ++out_mv; | |
2485 | out_mv += RDO_PROG_VOLT_MV_STEP - | |
2486 | (out_mv % RDO_PROG_VOLT_MV_STEP); | |
2487 | ||
2488 | if (out_mv > max_mv) { | |
2489 | tcpm_log(port, "Invalid PPS APDO selected!"); | |
2490 | return -EINVAL; | |
2491 | } | |
2492 | } | |
2493 | } | |
2494 | ||
2495 | tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d", | |
2496 | port->cc_req, port->cc1, port->cc2, port->vbus_source, | |
2497 | port->vconn_role == TYPEC_SOURCE ? "source" : "sink", | |
2498 | port->polarity); | |
2499 | ||
2500 | *rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags); | |
2501 | ||
2502 | tcpm_log(port, "Requesting APDO %d: %u mV, %u mA", | |
2503 | src_pdo_index, out_mv, op_ma); | |
2504 | ||
2505 | port->pps_data.op_curr = op_ma; | |
2506 | port->pps_data.out_volt = out_mv; | |
2507 | ||
2508 | return 0; | |
2509 | } | |
2510 | ||
2511 | static int tcpm_pd_send_pps_request(struct tcpm_port *port) | |
2512 | { | |
2513 | struct pd_message msg; | |
2514 | int ret; | |
2515 | u32 rdo; | |
2516 | ||
2517 | ret = tcpm_pd_build_pps_request(port, &rdo); | |
2518 | if (ret < 0) | |
2519 | return ret; | |
2520 | ||
2521 | memset(&msg, 0, sizeof(msg)); | |
2522 | msg.header = PD_HEADER_LE(PD_DATA_REQUEST, | |
2523 | port->pwr_role, | |
2524 | port->data_role, | |
2525 | port->negotiated_rev, | |
f0690a25 GR |
2526 | port->message_id, 1); |
2527 | msg.payload[0] = cpu_to_le32(rdo); | |
2528 | ||
2529 | return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg); | |
2530 | } | |
2531 | ||
2532 | static int tcpm_set_vbus(struct tcpm_port *port, bool enable) | |
2533 | { | |
2534 | int ret; | |
2535 | ||
2536 | if (enable && port->vbus_charge) | |
2537 | return -EINVAL; | |
2538 | ||
2539 | tcpm_log(port, "vbus:=%d charge=%d", enable, port->vbus_charge); | |
2540 | ||
2541 | ret = port->tcpc->set_vbus(port->tcpc, enable, port->vbus_charge); | |
2542 | if (ret < 0) | |
2543 | return ret; | |
2544 | ||
2545 | port->vbus_source = enable; | |
2546 | return 0; | |
2547 | } | |
2548 | ||
2549 | static int tcpm_set_charge(struct tcpm_port *port, bool charge) | |
2550 | { | |
2551 | int ret; | |
2552 | ||
2553 | if (charge && port->vbus_source) | |
2554 | return -EINVAL; | |
2555 | ||
2556 | if (charge != port->vbus_charge) { | |
2557 | tcpm_log(port, "vbus=%d charge:=%d", port->vbus_source, charge); | |
2558 | ret = port->tcpc->set_vbus(port->tcpc, port->vbus_source, | |
2559 | charge); | |
2560 | if (ret < 0) | |
2561 | return ret; | |
2562 | } | |
2563 | port->vbus_charge = charge; | |
2564 | return 0; | |
2565 | } | |
2566 | ||
7893f9e1 | 2567 | static bool tcpm_start_toggling(struct tcpm_port *port, enum typec_cc_status cc) |
f0690a25 GR |
2568 | { |
2569 | int ret; | |
2570 | ||
7893f9e1 HG |
2571 | if (!port->tcpc->start_toggling) |
2572 | return false; | |
f0690a25 | 2573 | |
7893f9e1 HG |
2574 | tcpm_log_force(port, "Start toggling"); |
2575 | ret = port->tcpc->start_toggling(port->tcpc, port->port_type, cc); | |
2576 | return ret == 0; | |
f0690a25 GR |
2577 | } |
2578 | ||
2579 | static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc) | |
2580 | { | |
2581 | tcpm_log(port, "cc:=%d", cc); | |
2582 | port->cc_req = cc; | |
2583 | port->tcpc->set_cc(port->tcpc, cc); | |
2584 | } | |
2585 | ||
2586 | static int tcpm_init_vbus(struct tcpm_port *port) | |
2587 | { | |
2588 | int ret; | |
2589 | ||
2590 | ret = port->tcpc->set_vbus(port->tcpc, false, false); | |
2591 | port->vbus_source = false; | |
2592 | port->vbus_charge = false; | |
2593 | return ret; | |
2594 | } | |
2595 | ||
2596 | static int tcpm_init_vconn(struct tcpm_port *port) | |
2597 | { | |
2598 | int ret; | |
2599 | ||
2600 | ret = port->tcpc->set_vconn(port->tcpc, false); | |
2601 | port->vconn_role = TYPEC_SINK; | |
2602 | return ret; | |
2603 | } | |
2604 | ||
2605 | static void tcpm_typec_connect(struct tcpm_port *port) | |
2606 | { | |
2607 | if (!port->connected) { | |
2608 | /* Make sure we don't report stale identity information */ | |
2609 | memset(&port->partner_ident, 0, sizeof(port->partner_ident)); | |
2610 | port->partner_desc.usb_pd = port->pd_capable; | |
2611 | if (tcpm_port_is_debug(port)) | |
2612 | port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG; | |
2613 | else if (tcpm_port_is_audio(port)) | |
2614 | port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO; | |
2615 | else | |
2616 | port->partner_desc.accessory = TYPEC_ACCESSORY_NONE; | |
2617 | port->partner = typec_register_partner(port->typec_port, | |
2618 | &port->partner_desc); | |
2619 | port->connected = true; | |
2620 | } | |
2621 | } | |
2622 | ||
2623 | static int tcpm_src_attach(struct tcpm_port *port) | |
2624 | { | |
2625 | enum typec_cc_polarity polarity = | |
2626 | port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2 | |
2627 | : TYPEC_POLARITY_CC1; | |
2628 | int ret; | |
2629 | ||
2630 | if (port->attached) | |
2631 | return 0; | |
2632 | ||
2633 | ret = tcpm_set_polarity(port, polarity); | |
2634 | if (ret < 0) | |
2635 | return ret; | |
2636 | ||
2637 | ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST); | |
2638 | if (ret < 0) | |
2639 | return ret; | |
2640 | ||
2641 | ret = port->tcpc->set_pd_rx(port->tcpc, true); | |
2642 | if (ret < 0) | |
2643 | goto out_disable_mux; | |
2644 | ||
2645 | /* | |
2646 | * USB Type-C specification, version 1.2, | |
2647 | * chapter 4.5.2.2.8.1 (Attached.SRC Requirements) | |
2648 | * Enable VCONN only if the non-RD port is set to RA. | |
2649 | */ | |
2650 | if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) || | |
2651 | (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) { | |
2652 | ret = tcpm_set_vconn(port, true); | |
2653 | if (ret < 0) | |
2654 | goto out_disable_pd; | |
2655 | } | |
2656 | ||
2657 | ret = tcpm_set_vbus(port, true); | |
2658 | if (ret < 0) | |
2659 | goto out_disable_vconn; | |
2660 | ||
2661 | port->pd_capable = false; | |
2662 | ||
2663 | port->partner = NULL; | |
2664 | ||
2665 | port->attached = true; | |
2666 | port->send_discover = true; | |
2667 | ||
2668 | return 0; | |
2669 | ||
2670 | out_disable_vconn: | |
2671 | tcpm_set_vconn(port, false); | |
2672 | out_disable_pd: | |
2673 | port->tcpc->set_pd_rx(port->tcpc, false); | |
2674 | out_disable_mux: | |
e9576fe8 | 2675 | tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE, |
2000016c | 2676 | TYPEC_ORIENTATION_NONE); |
f0690a25 GR |
2677 | return ret; |
2678 | } | |
2679 | ||
2680 | static void tcpm_typec_disconnect(struct tcpm_port *port) | |
2681 | { | |
2682 | if (port->connected) { | |
2683 | typec_unregister_partner(port->partner); | |
2684 | port->partner = NULL; | |
2685 | port->connected = false; | |
2686 | } | |
2687 | } | |
2688 | ||
2689 | static void tcpm_unregister_altmodes(struct tcpm_port *port) | |
2690 | { | |
2691 | struct pd_mode_data *modep = &port->mode_data; | |
2692 | int i; | |
2693 | ||
2694 | for (i = 0; i < modep->altmodes; i++) { | |
2695 | typec_unregister_altmode(port->partner_altmode[i]); | |
2696 | port->partner_altmode[i] = NULL; | |
2697 | } | |
2698 | ||
2699 | memset(modep, 0, sizeof(*modep)); | |
2700 | } | |
2701 | ||
2702 | static void tcpm_reset_port(struct tcpm_port *port) | |
2703 | { | |
2704 | tcpm_unregister_altmodes(port); | |
2705 | tcpm_typec_disconnect(port); | |
2706 | port->attached = false; | |
2707 | port->pd_capable = false; | |
2eadc33f | 2708 | port->pps_data.supported = false; |
f0690a25 | 2709 | |
5fec4b54 GR |
2710 | /* |
2711 | * First Rx ID should be 0; set this to a sentinel of -1 so that | |
2712 | * we can check tcpm_pd_rx_handler() if we had seen it before. | |
2713 | */ | |
2714 | port->rx_msgid = -1; | |
2715 | ||
f0690a25 GR |
2716 | port->tcpc->set_pd_rx(port->tcpc, false); |
2717 | tcpm_init_vbus(port); /* also disables charging */ | |
2718 | tcpm_init_vconn(port); | |
2719 | tcpm_set_current_limit(port, 0, 0); | |
2720 | tcpm_set_polarity(port, TYPEC_POLARITY_CC1); | |
e9576fe8 | 2721 | tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE, |
2000016c | 2722 | TYPEC_ORIENTATION_NONE); |
f0690a25 GR |
2723 | tcpm_set_attached_state(port, false); |
2724 | port->try_src_count = 0; | |
2725 | port->try_snk_count = 0; | |
f2a8aa05 AT |
2726 | port->usb_type = POWER_SUPPLY_USB_TYPE_C; |
2727 | ||
2728 | power_supply_changed(port->psy); | |
f0690a25 GR |
2729 | } |
2730 | ||
2731 | static void tcpm_detach(struct tcpm_port *port) | |
2732 | { | |
2733 | if (!port->attached) | |
2734 | return; | |
2735 | ||
2736 | if (tcpm_port_is_disconnected(port)) | |
2737 | port->hard_reset_count = 0; | |
2738 | ||
2739 | tcpm_reset_port(port); | |
2740 | } | |
2741 | ||
2742 | static void tcpm_src_detach(struct tcpm_port *port) | |
2743 | { | |
2744 | tcpm_detach(port); | |
2745 | } | |
2746 | ||
2747 | static int tcpm_snk_attach(struct tcpm_port *port) | |
2748 | { | |
2749 | int ret; | |
2750 | ||
2751 | if (port->attached) | |
2752 | return 0; | |
2753 | ||
2754 | ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ? | |
2755 | TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1); | |
2756 | if (ret < 0) | |
2757 | return ret; | |
2758 | ||
2759 | ret = tcpm_set_roles(port, true, TYPEC_SINK, TYPEC_DEVICE); | |
2760 | if (ret < 0) | |
2761 | return ret; | |
2762 | ||
2763 | port->pd_capable = false; | |
2764 | ||
2765 | port->partner = NULL; | |
2766 | ||
2767 | port->attached = true; | |
2768 | port->send_discover = true; | |
2769 | ||
2770 | return 0; | |
2771 | } | |
2772 | ||
2773 | static void tcpm_snk_detach(struct tcpm_port *port) | |
2774 | { | |
2775 | tcpm_detach(port); | |
f0690a25 GR |
2776 | } |
2777 | ||
2778 | static int tcpm_acc_attach(struct tcpm_port *port) | |
2779 | { | |
2780 | int ret; | |
2781 | ||
2782 | if (port->attached) | |
2783 | return 0; | |
2784 | ||
2785 | ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST); | |
2786 | if (ret < 0) | |
2787 | return ret; | |
2788 | ||
2789 | port->partner = NULL; | |
2790 | ||
2791 | tcpm_typec_connect(port); | |
2792 | ||
2793 | port->attached = true; | |
2794 | ||
2795 | return 0; | |
2796 | } | |
2797 | ||
2798 | static void tcpm_acc_detach(struct tcpm_port *port) | |
2799 | { | |
2800 | tcpm_detach(port); | |
2801 | } | |
2802 | ||
2803 | static inline enum tcpm_state hard_reset_state(struct tcpm_port *port) | |
2804 | { | |
2805 | if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) | |
2806 | return HARD_RESET_SEND; | |
2807 | if (port->pd_capable) | |
2808 | return ERROR_RECOVERY; | |
2809 | if (port->pwr_role == TYPEC_SOURCE) | |
2810 | return SRC_UNATTACHED; | |
2811 | if (port->state == SNK_WAIT_CAPABILITIES) | |
2812 | return SNK_READY; | |
2813 | return SNK_UNATTACHED; | |
2814 | } | |
2815 | ||
f0690a25 GR |
2816 | static inline enum tcpm_state unattached_state(struct tcpm_port *port) |
2817 | { | |
13cb492c BJS |
2818 | if (port->port_type == TYPEC_PORT_DRP) { |
2819 | if (port->pwr_role == TYPEC_SOURCE) | |
2820 | return SRC_UNATTACHED; | |
2821 | else | |
2822 | return SNK_UNATTACHED; | |
ceeb1625 | 2823 | } else if (port->port_type == TYPEC_PORT_SRC) { |
f0690a25 | 2824 | return SRC_UNATTACHED; |
13cb492c BJS |
2825 | } |
2826 | ||
2827 | return SNK_UNATTACHED; | |
f0690a25 GR |
2828 | } |
2829 | ||
2830 | static void tcpm_check_send_discover(struct tcpm_port *port) | |
2831 | { | |
2832 | if (port->data_role == TYPEC_HOST && port->send_discover && | |
2833 | port->pd_capable) { | |
2834 | tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0); | |
2835 | port->send_discover = false; | |
2836 | } | |
2837 | } | |
2838 | ||
2839 | static void tcpm_swap_complete(struct tcpm_port *port, int result) | |
2840 | { | |
2841 | if (port->swap_pending) { | |
2842 | port->swap_status = result; | |
2843 | port->swap_pending = false; | |
b17dd571 | 2844 | port->non_pd_role_swap = false; |
f0690a25 GR |
2845 | complete(&port->swap_complete); |
2846 | } | |
2847 | } | |
2848 | ||
53b70e5c | 2849 | static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc) |
fce042f0 BJS |
2850 | { |
2851 | switch (cc) { | |
2852 | case TYPEC_CC_RP_1_5: | |
2853 | return TYPEC_PWR_MODE_1_5A; | |
2854 | case TYPEC_CC_RP_3_0: | |
2855 | return TYPEC_PWR_MODE_3_0A; | |
2856 | case TYPEC_CC_RP_DEF: | |
2857 | default: | |
2858 | return TYPEC_PWR_MODE_USB; | |
2859 | } | |
2860 | } | |
2861 | ||
f0690a25 GR |
2862 | static void run_state_machine(struct tcpm_port *port) |
2863 | { | |
2864 | int ret; | |
fce042f0 | 2865 | enum typec_pwr_opmode opmode; |
131c7d12 | 2866 | unsigned int msecs; |
f0690a25 GR |
2867 | |
2868 | port->enter_state = port->state; | |
2869 | switch (port->state) { | |
7893f9e1 | 2870 | case TOGGLING: |
f0690a25 GR |
2871 | break; |
2872 | /* SRC states */ | |
2873 | case SRC_UNATTACHED: | |
b17dd571 GR |
2874 | if (!port->non_pd_role_swap) |
2875 | tcpm_swap_complete(port, -ENOTCONN); | |
f0690a25 | 2876 | tcpm_src_detach(port); |
7893f9e1 HG |
2877 | if (tcpm_start_toggling(port, tcpm_rp_cc(port))) { |
2878 | tcpm_set_state(port, TOGGLING, 0); | |
f0690a25 GR |
2879 | break; |
2880 | } | |
2881 | tcpm_set_cc(port, tcpm_rp_cc(port)); | |
9b0ae699 | 2882 | if (port->port_type == TYPEC_PORT_DRP) |
f0690a25 GR |
2883 | tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK); |
2884 | break; | |
2885 | case SRC_ATTACH_WAIT: | |
2886 | if (tcpm_port_is_debug(port)) | |
2887 | tcpm_set_state(port, DEBUG_ACC_ATTACHED, | |
2888 | PD_T_CC_DEBOUNCE); | |
2889 | else if (tcpm_port_is_audio(port)) | |
2890 | tcpm_set_state(port, AUDIO_ACC_ATTACHED, | |
2891 | PD_T_CC_DEBOUNCE); | |
2892 | else if (tcpm_port_is_source(port)) | |
2893 | tcpm_set_state(port, | |
2894 | tcpm_try_snk(port) ? SNK_TRY | |
2895 | : SRC_ATTACHED, | |
2896 | PD_T_CC_DEBOUNCE); | |
2897 | break; | |
2898 | ||
2899 | case SNK_TRY: | |
2900 | port->try_snk_count++; | |
2901 | /* | |
2902 | * Requirements: | |
2903 | * - Do not drive vconn or vbus | |
2904 | * - Terminate CC pins (both) to Rd | |
2905 | * Action: | |
2906 | * - Wait for tDRPTry (PD_T_DRP_TRY). | |
2907 | * Until then, ignore any state changes. | |
2908 | */ | |
2909 | tcpm_set_cc(port, TYPEC_CC_RD); | |
2910 | tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY); | |
2911 | break; | |
2912 | case SNK_TRY_WAIT: | |
a0a3e04e BJS |
2913 | if (tcpm_port_is_sink(port)) { |
2914 | tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0); | |
2915 | } else { | |
2916 | tcpm_set_state(port, SRC_TRYWAIT, 0); | |
2917 | port->max_wait = 0; | |
2918 | } | |
2919 | break; | |
2920 | case SNK_TRY_WAIT_DEBOUNCE: | |
2921 | tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS, | |
2922 | PD_T_PD_DEBOUNCE); | |
2923 | break; | |
2924 | case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS: | |
f0690a25 GR |
2925 | if (port->vbus_present && tcpm_port_is_sink(port)) { |
2926 | tcpm_set_state(port, SNK_ATTACHED, 0); | |
a0a3e04e BJS |
2927 | } else { |
2928 | tcpm_set_state(port, SRC_TRYWAIT, 0); | |
02d5be46 | 2929 | port->max_wait = 0; |
f0690a25 | 2930 | } |
f0690a25 GR |
2931 | break; |
2932 | case SRC_TRYWAIT: | |
2933 | tcpm_set_cc(port, tcpm_rp_cc(port)); | |
02d5be46 BJS |
2934 | if (port->max_wait == 0) { |
2935 | port->max_wait = jiffies + | |
2936 | msecs_to_jiffies(PD_T_DRP_TRY); | |
f0690a25 GR |
2937 | tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED, |
2938 | PD_T_DRP_TRY); | |
02d5be46 BJS |
2939 | } else { |
2940 | if (time_is_after_jiffies(port->max_wait)) | |
2941 | tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED, | |
2942 | jiffies_to_msecs(port->max_wait - | |
2943 | jiffies)); | |
2944 | else | |
2945 | tcpm_set_state(port, SNK_UNATTACHED, 0); | |
2946 | } | |
2947 | break; | |
2948 | case SRC_TRYWAIT_DEBOUNCE: | |
2949 | tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE); | |
f0690a25 GR |
2950 | break; |
2951 | case SRC_TRYWAIT_UNATTACHED: | |
2952 | tcpm_set_state(port, SNK_UNATTACHED, 0); | |
2953 | break; | |
2954 | ||
2955 | case SRC_ATTACHED: | |
2956 | ret = tcpm_src_attach(port); | |
2957 | tcpm_set_state(port, SRC_UNATTACHED, | |
2958 | ret < 0 ? 0 : PD_T_PS_SOURCE_ON); | |
2959 | break; | |
2960 | case SRC_STARTUP: | |
fce042f0 BJS |
2961 | opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port)); |
2962 | typec_set_pwr_opmode(port->typec_port, opmode); | |
f0690a25 GR |
2963 | port->pwr_opmode = TYPEC_PWR_MODE_USB; |
2964 | port->caps_count = 0; | |
2eadc33f | 2965 | port->negotiated_rev = PD_MAX_REV; |
f0690a25 | 2966 | port->message_id = 0; |
5fec4b54 | 2967 | port->rx_msgid = -1; |
f0690a25 GR |
2968 | port->explicit_contract = false; |
2969 | tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0); | |
2970 | break; | |
2971 | case SRC_SEND_CAPABILITIES: | |
2972 | port->caps_count++; | |
2973 | if (port->caps_count > PD_N_CAPS_COUNT) { | |
2974 | tcpm_set_state(port, SRC_READY, 0); | |
2975 | break; | |
2976 | } | |
2977 | ret = tcpm_pd_send_source_caps(port); | |
2978 | if (ret < 0) { | |
2979 | tcpm_set_state(port, SRC_SEND_CAPABILITIES, | |
2980 | PD_T_SEND_SOURCE_CAP); | |
2981 | } else { | |
2982 | /* | |
2983 | * Per standard, we should clear the reset counter here. | |
2984 | * However, that can result in state machine hang-ups. | |
2985 | * Reset it only in READY state to improve stability. | |
2986 | */ | |
2987 | /* port->hard_reset_count = 0; */ | |
2988 | port->caps_count = 0; | |
2989 | port->pd_capable = true; | |
976daf9d | 2990 | tcpm_set_state_cond(port, SRC_SEND_CAPABILITIES_TIMEOUT, |
f0690a25 GR |
2991 | PD_T_SEND_SOURCE_CAP); |
2992 | } | |
2993 | break; | |
976daf9d HG |
2994 | case SRC_SEND_CAPABILITIES_TIMEOUT: |
2995 | /* | |
2996 | * Error recovery for a PD_DATA_SOURCE_CAP reply timeout. | |
2997 | * | |
2998 | * PD 2.0 sinks are supposed to accept src-capabilities with a | |
2999 | * 3.0 header and simply ignore any src PDOs which the sink does | |
3000 | * not understand such as PPS but some 2.0 sinks instead ignore | |
3001 | * the entire PD_DATA_SOURCE_CAP message, causing contract | |
3002 | * negotiation to fail. | |
3003 | * | |
3004 | * After PD_N_HARD_RESET_COUNT hard-reset attempts, we try | |
3005 | * sending src-capabilities with a lower PD revision to | |
3006 | * make these broken sinks work. | |
3007 | */ | |
3008 | if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) { | |
3009 | tcpm_set_state(port, HARD_RESET_SEND, 0); | |
3010 | } else if (port->negotiated_rev > PD_REV20) { | |
3011 | port->negotiated_rev--; | |
3012 | port->hard_reset_count = 0; | |
3013 | tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0); | |
3014 | } else { | |
3015 | tcpm_set_state(port, hard_reset_state(port), 0); | |
3016 | } | |
3017 | break; | |
f0690a25 GR |
3018 | case SRC_NEGOTIATE_CAPABILITIES: |
3019 | ret = tcpm_pd_check_request(port); | |
3020 | if (ret < 0) { | |
3021 | tcpm_pd_send_control(port, PD_CTRL_REJECT); | |
3022 | if (!port->explicit_contract) { | |
3023 | tcpm_set_state(port, | |
3024 | SRC_WAIT_NEW_CAPABILITIES, 0); | |
3025 | } else { | |
3026 | tcpm_set_state(port, SRC_READY, 0); | |
3027 | } | |
3028 | } else { | |
3029 | tcpm_pd_send_control(port, PD_CTRL_ACCEPT); | |
3030 | tcpm_set_state(port, SRC_TRANSITION_SUPPLY, | |
3031 | PD_T_SRC_TRANSITION); | |
3032 | } | |
3033 | break; | |
3034 | case SRC_TRANSITION_SUPPLY: | |
3035 | /* XXX: regulator_set_voltage(vbus, ...) */ | |
3036 | tcpm_pd_send_control(port, PD_CTRL_PS_RDY); | |
3037 | port->explicit_contract = true; | |
3038 | typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD); | |
3039 | port->pwr_opmode = TYPEC_PWR_MODE_PD; | |
3040 | tcpm_set_state_cond(port, SRC_READY, 0); | |
3041 | break; | |
3042 | case SRC_READY: | |
3043 | #if 1 | |
3044 | port->hard_reset_count = 0; | |
3045 | #endif | |
3046 | port->try_src_count = 0; | |
3047 | ||
3113bf1a | 3048 | tcpm_swap_complete(port, 0); |
f0690a25 | 3049 | tcpm_typec_connect(port); |
2eadc33f | 3050 | |
f0690a25 GR |
3051 | tcpm_check_send_discover(port); |
3052 | /* | |
3053 | * 6.3.5 | |
3054 | * Sending ping messages is not necessary if | |
3055 | * - the source operates at vSafe5V | |
3056 | * or | |
3057 | * - The system is not operating in PD mode | |
3058 | * or | |
3059 | * - Both partners are connected using a Type-C connector | |
f451ac9e BJS |
3060 | * |
3061 | * There is no actual need to send PD messages since the local | |
3062 | * port type-c and the spec does not clearly say whether PD is | |
3063 | * possible when type-c is connected to Type-A/B | |
f0690a25 | 3064 | */ |
f0690a25 GR |
3065 | break; |
3066 | case SRC_WAIT_NEW_CAPABILITIES: | |
3067 | /* Nothing to do... */ | |
3068 | break; | |
3069 | ||
3070 | /* SNK states */ | |
3071 | case SNK_UNATTACHED: | |
b17dd571 GR |
3072 | if (!port->non_pd_role_swap) |
3073 | tcpm_swap_complete(port, -ENOTCONN); | |
2eadc33f | 3074 | tcpm_pps_complete(port, -ENOTCONN); |
f0690a25 | 3075 | tcpm_snk_detach(port); |
7893f9e1 HG |
3076 | if (tcpm_start_toggling(port, TYPEC_CC_RD)) { |
3077 | tcpm_set_state(port, TOGGLING, 0); | |
f0690a25 GR |
3078 | break; |
3079 | } | |
3080 | tcpm_set_cc(port, TYPEC_CC_RD); | |
9b0ae699 | 3081 | if (port->port_type == TYPEC_PORT_DRP) |
f0690a25 GR |
3082 | tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC); |
3083 | break; | |
3084 | case SNK_ATTACH_WAIT: | |
3085 | if ((port->cc1 == TYPEC_CC_OPEN && | |
3086 | port->cc2 != TYPEC_CC_OPEN) || | |
3087 | (port->cc1 != TYPEC_CC_OPEN && | |
3088 | port->cc2 == TYPEC_CC_OPEN)) | |
3089 | tcpm_set_state(port, SNK_DEBOUNCED, | |
3090 | PD_T_CC_DEBOUNCE); | |
3091 | else if (tcpm_port_is_disconnected(port)) | |
3092 | tcpm_set_state(port, SNK_UNATTACHED, | |
3093 | PD_T_PD_DEBOUNCE); | |
3094 | break; | |
3095 | case SNK_DEBOUNCED: | |
3096 | if (tcpm_port_is_disconnected(port)) | |
3097 | tcpm_set_state(port, SNK_UNATTACHED, | |
3098 | PD_T_PD_DEBOUNCE); | |
3099 | else if (port->vbus_present) | |
3100 | tcpm_set_state(port, | |
3101 | tcpm_try_src(port) ? SRC_TRY | |
3102 | : SNK_ATTACHED, | |
3103 | 0); | |
3104 | else | |
3105 | /* Wait for VBUS, but not forever */ | |
56277035 | 3106 | tcpm_set_state(port, PORT_RESET, PD_T_PS_SOURCE_ON); |
f0690a25 GR |
3107 | break; |
3108 | ||
3109 | case SRC_TRY: | |
3110 | port->try_src_count++; | |
3111 | tcpm_set_cc(port, tcpm_rp_cc(port)); | |
131c7d12 BJS |
3112 | port->max_wait = 0; |
3113 | tcpm_set_state(port, SRC_TRY_WAIT, 0); | |
3114 | break; | |
3115 | case SRC_TRY_WAIT: | |
3116 | if (port->max_wait == 0) { | |
3117 | port->max_wait = jiffies + | |
3118 | msecs_to_jiffies(PD_T_DRP_TRY); | |
3119 | msecs = PD_T_DRP_TRY; | |
3120 | } else { | |
3121 | if (time_is_after_jiffies(port->max_wait)) | |
3122 | msecs = jiffies_to_msecs(port->max_wait - | |
3123 | jiffies); | |
3124 | else | |
3125 | msecs = 0; | |
3126 | } | |
3127 | tcpm_set_state(port, SNK_TRYWAIT, msecs); | |
f0690a25 GR |
3128 | break; |
3129 | case SRC_TRY_DEBOUNCE: | |
3130 | tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE); | |
3131 | break; | |
3132 | case SNK_TRYWAIT: | |
3133 | tcpm_set_cc(port, TYPEC_CC_RD); | |
af450ebb | 3134 | tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE); |
f0690a25 | 3135 | break; |
af450ebb BJS |
3136 | case SNK_TRYWAIT_VBUS: |
3137 | /* | |
3138 | * TCPM stays in this state indefinitely until VBUS | |
3139 | * is detected as long as Rp is not detected for | |
3140 | * more than a time period of tPDDebounce. | |
3141 | */ | |
3142 | if (port->vbus_present && tcpm_port_is_sink(port)) { | |
f0690a25 GR |
3143 | tcpm_set_state(port, SNK_ATTACHED, 0); |
3144 | break; | |
3145 | } | |
af450ebb BJS |
3146 | if (!tcpm_port_is_sink(port)) |
3147 | tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0); | |
f0690a25 | 3148 | break; |
af450ebb BJS |
3149 | case SNK_TRYWAIT_DEBOUNCE: |
3150 | tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE); | |
f0690a25 | 3151 | break; |
f0690a25 GR |
3152 | case SNK_ATTACHED: |
3153 | ret = tcpm_snk_attach(port); | |
3154 | if (ret < 0) | |
3155 | tcpm_set_state(port, SNK_UNATTACHED, 0); | |
3156 | else | |
3157 | tcpm_set_state(port, SNK_STARTUP, 0); | |
3158 | break; | |
3159 | case SNK_STARTUP: | |
fce042f0 BJS |
3160 | opmode = tcpm_get_pwr_opmode(port->polarity ? |
3161 | port->cc2 : port->cc1); | |
3162 | typec_set_pwr_opmode(port->typec_port, opmode); | |
f0690a25 | 3163 | port->pwr_opmode = TYPEC_PWR_MODE_USB; |
2eadc33f | 3164 | port->negotiated_rev = PD_MAX_REV; |
f0690a25 | 3165 | port->message_id = 0; |
5fec4b54 | 3166 | port->rx_msgid = -1; |
f0690a25 GR |
3167 | port->explicit_contract = false; |
3168 | tcpm_set_state(port, SNK_DISCOVERY, 0); | |
3169 | break; | |
3170 | case SNK_DISCOVERY: | |
3171 | if (port->vbus_present) { | |
3172 | tcpm_set_current_limit(port, | |
3173 | tcpm_get_current_limit(port), | |
3174 | 5000); | |
3175 | tcpm_set_charge(port, true); | |
3176 | tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); | |
3177 | break; | |
3178 | } | |
3179 | /* | |
3180 | * For DRP, timeouts differ. Also, handling is supposed to be | |
3181 | * different and much more complex (dead battery detection; | |
3182 | * see USB power delivery specification, section 8.3.3.6.1.5.1). | |
3183 | */ | |
3184 | tcpm_set_state(port, hard_reset_state(port), | |
9b0ae699 | 3185 | port->port_type == TYPEC_PORT_DRP ? |
f0690a25 GR |
3186 | PD_T_DB_DETECT : PD_T_NO_RESPONSE); |
3187 | break; | |
3188 | case SNK_DISCOVERY_DEBOUNCE: | |
3189 | tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE, | |
3190 | PD_T_CC_DEBOUNCE); | |
3191 | break; | |
3192 | case SNK_DISCOVERY_DEBOUNCE_DONE: | |
3193 | if (!tcpm_port_is_disconnected(port) && | |
3194 | tcpm_port_is_sink(port) && | |
3195 | time_is_after_jiffies(port->delayed_runtime)) { | |
3196 | tcpm_set_state(port, SNK_DISCOVERY, | |
9578bcd0 DC |
3197 | jiffies_to_msecs(port->delayed_runtime - |
3198 | jiffies)); | |
f0690a25 GR |
3199 | break; |
3200 | } | |
3201 | tcpm_set_state(port, unattached_state(port), 0); | |
3202 | break; | |
3203 | case SNK_WAIT_CAPABILITIES: | |
3204 | ret = port->tcpc->set_pd_rx(port->tcpc, true); | |
3205 | if (ret < 0) { | |
3206 | tcpm_set_state(port, SNK_READY, 0); | |
3207 | break; | |
3208 | } | |
3209 | /* | |
3210 | * If VBUS has never been low, and we time out waiting | |
3211 | * for source cap, try a soft reset first, in case we | |
3212 | * were already in a stable contract before this boot. | |
3213 | * Do this only once. | |
3214 | */ | |
3215 | if (port->vbus_never_low) { | |
3216 | port->vbus_never_low = false; | |
3217 | tcpm_set_state(port, SOFT_RESET_SEND, | |
3218 | PD_T_SINK_WAIT_CAP); | |
3219 | } else { | |
3220 | tcpm_set_state(port, hard_reset_state(port), | |
3221 | PD_T_SINK_WAIT_CAP); | |
3222 | } | |
3223 | break; | |
3224 | case SNK_NEGOTIATE_CAPABILITIES: | |
3225 | port->pd_capable = true; | |
3226 | port->hard_reset_count = 0; | |
3227 | ret = tcpm_pd_send_request(port); | |
3228 | if (ret < 0) { | |
3229 | /* Let the Source send capabilities again. */ | |
3230 | tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); | |
3231 | } else { | |
3232 | tcpm_set_state_cond(port, hard_reset_state(port), | |
3233 | PD_T_SENDER_RESPONSE); | |
3234 | } | |
3235 | break; | |
2eadc33f AT |
3236 | case SNK_NEGOTIATE_PPS_CAPABILITIES: |
3237 | ret = tcpm_pd_send_pps_request(port); | |
3238 | if (ret < 0) { | |
3239 | port->pps_status = ret; | |
3240 | /* | |
3241 | * If this was called due to updates to sink | |
3242 | * capabilities, and pps is no longer valid, we should | |
3243 | * safely fall back to a standard PDO. | |
3244 | */ | |
3245 | if (port->update_sink_caps) | |
3246 | tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); | |
3247 | else | |
3248 | tcpm_set_state(port, SNK_READY, 0); | |
3249 | } else { | |
3250 | tcpm_set_state_cond(port, hard_reset_state(port), | |
3251 | PD_T_SENDER_RESPONSE); | |
3252 | } | |
3253 | break; | |
f0690a25 GR |
3254 | case SNK_TRANSITION_SINK: |
3255 | case SNK_TRANSITION_SINK_VBUS: | |
3256 | tcpm_set_state(port, hard_reset_state(port), | |
3257 | PD_T_PS_TRANSITION); | |
3258 | break; | |
3259 | case SNK_READY: | |
3260 | port->try_snk_count = 0; | |
2eadc33f | 3261 | port->update_sink_caps = false; |
8bf05746 BJS |
3262 | if (port->explicit_contract) { |
3263 | typec_set_pwr_opmode(port->typec_port, | |
3264 | TYPEC_PWR_MODE_PD); | |
3265 | port->pwr_opmode = TYPEC_PWR_MODE_PD; | |
3266 | } | |
f0690a25 | 3267 | |
3113bf1a | 3268 | tcpm_swap_complete(port, 0); |
f0690a25 | 3269 | tcpm_typec_connect(port); |
f0690a25 | 3270 | tcpm_check_send_discover(port); |
2eadc33f AT |
3271 | tcpm_pps_complete(port, port->pps_status); |
3272 | ||
f2a8aa05 AT |
3273 | power_supply_changed(port->psy); |
3274 | ||
f0690a25 GR |
3275 | break; |
3276 | ||
3277 | /* Accessory states */ | |
3278 | case ACC_UNATTACHED: | |
3279 | tcpm_acc_detach(port); | |
3280 | tcpm_set_state(port, SRC_UNATTACHED, 0); | |
3281 | break; | |
3282 | case DEBUG_ACC_ATTACHED: | |
3283 | case AUDIO_ACC_ATTACHED: | |
3284 | ret = tcpm_acc_attach(port); | |
3285 | if (ret < 0) | |
3286 | tcpm_set_state(port, ACC_UNATTACHED, 0); | |
3287 | break; | |
3288 | case AUDIO_ACC_DEBOUNCE: | |
3289 | tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE); | |
3290 | break; | |
3291 | ||
3292 | /* Hard_Reset states */ | |
3293 | case HARD_RESET_SEND: | |
3294 | tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL); | |
3295 | tcpm_set_state(port, HARD_RESET_START, 0); | |
3296 | break; | |
3297 | case HARD_RESET_START: | |
3298 | port->hard_reset_count++; | |
3299 | port->tcpc->set_pd_rx(port->tcpc, false); | |
3300 | tcpm_unregister_altmodes(port); | |
3301 | port->send_discover = true; | |
3302 | if (port->pwr_role == TYPEC_SOURCE) | |
3303 | tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF, | |
3304 | PD_T_PS_HARD_RESET); | |
3305 | else | |
3306 | tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0); | |
3307 | break; | |
3308 | case SRC_HARD_RESET_VBUS_OFF: | |
3309 | tcpm_set_vconn(port, true); | |
3310 | tcpm_set_vbus(port, false); | |
23b5f732 BJS |
3311 | tcpm_set_roles(port, port->self_powered, TYPEC_SOURCE, |
3312 | TYPEC_HOST); | |
f0690a25 GR |
3313 | tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER); |
3314 | break; | |
3315 | case SRC_HARD_RESET_VBUS_ON: | |
3316 | tcpm_set_vbus(port, true); | |
3317 | port->tcpc->set_pd_rx(port->tcpc, true); | |
3318 | tcpm_set_attached_state(port, true); | |
3319 | tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON); | |
3320 | break; | |
3321 | case SNK_HARD_RESET_SINK_OFF: | |
2eadc33f | 3322 | memset(&port->pps_data, 0, sizeof(port->pps_data)); |
f0690a25 | 3323 | tcpm_set_vconn(port, false); |
157c0f2f BJS |
3324 | if (port->pd_capable) |
3325 | tcpm_set_charge(port, false); | |
23b5f732 BJS |
3326 | tcpm_set_roles(port, port->self_powered, TYPEC_SINK, |
3327 | TYPEC_DEVICE); | |
f0690a25 GR |
3328 | /* |
3329 | * VBUS may or may not toggle, depending on the adapter. | |
3330 | * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON | |
3331 | * directly after timeout. | |
3332 | */ | |
3333 | tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V); | |
3334 | break; | |
3335 | case SNK_HARD_RESET_WAIT_VBUS: | |
3336 | /* Assume we're disconnected if VBUS doesn't come back. */ | |
3337 | tcpm_set_state(port, SNK_UNATTACHED, | |
3338 | PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON); | |
3339 | break; | |
3340 | case SNK_HARD_RESET_SINK_ON: | |
3341 | /* Note: There is no guarantee that VBUS is on in this state */ | |
3342 | /* | |
3343 | * XXX: | |
3344 | * The specification suggests that dual mode ports in sink | |
3345 | * mode should transition to state PE_SRC_Transition_to_default. | |
3346 | * See USB power delivery specification chapter 8.3.3.6.1.3. | |
3347 | * This would mean to to | |
3348 | * - turn off VCONN, reset power supply | |
3349 | * - request hardware reset | |
3350 | * - turn on VCONN | |
3351 | * - Transition to state PE_Src_Startup | |
3352 | * SNK only ports shall transition to state Snk_Startup | |
3353 | * (see chapter 8.3.3.3.8). | |
3354 | * Similar, dual-mode ports in source mode should transition | |
3355 | * to PE_SNK_Transition_to_default. | |
3356 | */ | |
157c0f2f BJS |
3357 | if (port->pd_capable) { |
3358 | tcpm_set_current_limit(port, | |
3359 | tcpm_get_current_limit(port), | |
3360 | 5000); | |
3361 | tcpm_set_charge(port, true); | |
3362 | } | |
f0690a25 GR |
3363 | tcpm_set_attached_state(port, true); |
3364 | tcpm_set_state(port, SNK_STARTUP, 0); | |
3365 | break; | |
3366 | ||
3367 | /* Soft_Reset states */ | |
3368 | case SOFT_RESET: | |
3369 | port->message_id = 0; | |
5fec4b54 | 3370 | port->rx_msgid = -1; |
f0690a25 GR |
3371 | tcpm_pd_send_control(port, PD_CTRL_ACCEPT); |
3372 | if (port->pwr_role == TYPEC_SOURCE) | |
3373 | tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0); | |
3374 | else | |
3375 | tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0); | |
3376 | break; | |
3377 | case SOFT_RESET_SEND: | |
3378 | port->message_id = 0; | |
5fec4b54 | 3379 | port->rx_msgid = -1; |
f0690a25 GR |
3380 | if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET)) |
3381 | tcpm_set_state_cond(port, hard_reset_state(port), 0); | |
3382 | else | |
3383 | tcpm_set_state_cond(port, hard_reset_state(port), | |
3384 | PD_T_SENDER_RESPONSE); | |
3385 | break; | |
3386 | ||
3387 | /* DR_Swap states */ | |
3388 | case DR_SWAP_SEND: | |
3389 | tcpm_pd_send_control(port, PD_CTRL_DR_SWAP); | |
3390 | tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT, | |
3391 | PD_T_SENDER_RESPONSE); | |
3392 | break; | |
3393 | case DR_SWAP_ACCEPT: | |
3394 | tcpm_pd_send_control(port, PD_CTRL_ACCEPT); | |
3395 | tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0); | |
3396 | break; | |
3397 | case DR_SWAP_SEND_TIMEOUT: | |
3398 | tcpm_swap_complete(port, -ETIMEDOUT); | |
3399 | tcpm_set_state(port, ready_state(port), 0); | |
3400 | break; | |
3401 | case DR_SWAP_CHANGE_DR: | |
3402 | if (port->data_role == TYPEC_HOST) { | |
3403 | tcpm_unregister_altmodes(port); | |
3404 | tcpm_set_roles(port, true, port->pwr_role, | |
3405 | TYPEC_DEVICE); | |
3406 | } else { | |
3407 | tcpm_set_roles(port, true, port->pwr_role, | |
3408 | TYPEC_HOST); | |
3409 | port->send_discover = true; | |
3410 | } | |
f0690a25 GR |
3411 | tcpm_set_state(port, ready_state(port), 0); |
3412 | break; | |
3413 | ||
3414 | /* PR_Swap states */ | |
3415 | case PR_SWAP_ACCEPT: | |
3416 | tcpm_pd_send_control(port, PD_CTRL_ACCEPT); | |
3417 | tcpm_set_state(port, PR_SWAP_START, 0); | |
3418 | break; | |
3419 | case PR_SWAP_SEND: | |
3420 | tcpm_pd_send_control(port, PD_CTRL_PR_SWAP); | |
3421 | tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT, | |
3422 | PD_T_SENDER_RESPONSE); | |
3423 | break; | |
3424 | case PR_SWAP_SEND_TIMEOUT: | |
3425 | tcpm_swap_complete(port, -ETIMEDOUT); | |
3426 | tcpm_set_state(port, ready_state(port), 0); | |
3427 | break; | |
3428 | case PR_SWAP_START: | |
3429 | if (port->pwr_role == TYPEC_SOURCE) | |
3430 | tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF, | |
3431 | PD_T_SRC_TRANSITION); | |
3432 | else | |
3433 | tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0); | |
3434 | break; | |
3435 | case PR_SWAP_SRC_SNK_TRANSITION_OFF: | |
3436 | tcpm_set_vbus(port, false); | |
3437 | port->explicit_contract = false; | |
b965b631 | 3438 | /* allow time for Vbus discharge, must be < tSrcSwapStdby */ |
f0690a25 | 3439 | tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, |
b965b631 | 3440 | PD_T_SRCSWAPSTDBY); |
f0690a25 GR |
3441 | break; |
3442 | case PR_SWAP_SRC_SNK_SOURCE_OFF: | |
3443 | tcpm_set_cc(port, TYPEC_CC_RD); | |
b965b631 BJS |
3444 | /* allow CC debounce */ |
3445 | tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED, | |
3446 | PD_T_CC_DEBOUNCE); | |
3447 | break; | |
3448 | case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: | |
050161ea GR |
3449 | /* |
3450 | * USB-PD standard, 6.2.1.4, Port Power Role: | |
3451 | * "During the Power Role Swap Sequence, for the initial Source | |
3452 | * Port, the Port Power Role field shall be set to Sink in the | |
3453 | * PS_RDY Message indicating that the initial Source’s power | |
3454 | * supply is turned off" | |
3455 | */ | |
3456 | tcpm_set_pwr_role(port, TYPEC_SINK); | |
f0690a25 GR |
3457 | if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) { |
3458 | tcpm_set_state(port, ERROR_RECOVERY, 0); | |
3459 | break; | |
3460 | } | |
3461 | tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON); | |
3462 | break; | |
3463 | case PR_SWAP_SRC_SNK_SINK_ON: | |
f0690a25 GR |
3464 | tcpm_set_state(port, SNK_STARTUP, 0); |
3465 | break; | |
3466 | case PR_SWAP_SNK_SRC_SINK_OFF: | |
3467 | tcpm_set_charge(port, false); | |
3468 | tcpm_set_state(port, hard_reset_state(port), | |
3469 | PD_T_PS_SOURCE_OFF); | |
3470 | break; | |
3471 | case PR_SWAP_SNK_SRC_SOURCE_ON: | |
3472 | tcpm_set_cc(port, tcpm_rp_cc(port)); | |
3473 | tcpm_set_vbus(port, true); | |
b965b631 BJS |
3474 | /* |
3475 | * allow time VBUS ramp-up, must be < tNewSrc | |
3476 | * Also, this window overlaps with CC debounce as well. | |
3477 | * So, Wait for the max of two which is PD_T_NEWSRC | |
3478 | */ | |
3479 | tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP, | |
3480 | PD_T_NEWSRC); | |
3481 | break; | |
3482 | case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP: | |
050161ea GR |
3483 | /* |
3484 | * USB PD standard, 6.2.1.4: | |
3485 | * "Subsequent Messages initiated by the Policy Engine, | |
3486 | * such as the PS_RDY Message sent to indicate that Vbus | |
3487 | * is ready, will have the Port Power Role field set to | |
3488 | * Source." | |
3489 | */ | |
f0690a25 | 3490 | tcpm_set_pwr_role(port, TYPEC_SOURCE); |
050161ea | 3491 | tcpm_pd_send_control(port, PD_CTRL_PS_RDY); |
f0690a25 GR |
3492 | tcpm_set_state(port, SRC_STARTUP, 0); |
3493 | break; | |
3494 | ||
3495 | case VCONN_SWAP_ACCEPT: | |
3496 | tcpm_pd_send_control(port, PD_CTRL_ACCEPT); | |
3497 | tcpm_set_state(port, VCONN_SWAP_START, 0); | |
3498 | break; | |
3499 | case VCONN_SWAP_SEND: | |
3500 | tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP); | |
3501 | tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT, | |
3502 | PD_T_SENDER_RESPONSE); | |
3503 | break; | |
3504 | case VCONN_SWAP_SEND_TIMEOUT: | |
3505 | tcpm_swap_complete(port, -ETIMEDOUT); | |
3506 | tcpm_set_state(port, ready_state(port), 0); | |
3507 | break; | |
3508 | case VCONN_SWAP_START: | |
3509 | if (port->vconn_role == TYPEC_SOURCE) | |
3510 | tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0); | |
3511 | else | |
3512 | tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0); | |
3513 | break; | |
3514 | case VCONN_SWAP_WAIT_FOR_VCONN: | |
3515 | tcpm_set_state(port, hard_reset_state(port), | |
3516 | PD_T_VCONN_SOURCE_ON); | |
3517 | break; | |
3518 | case VCONN_SWAP_TURN_ON_VCONN: | |
3519 | tcpm_set_vconn(port, true); | |
3520 | tcpm_pd_send_control(port, PD_CTRL_PS_RDY); | |
f0690a25 GR |
3521 | tcpm_set_state(port, ready_state(port), 0); |
3522 | break; | |
3523 | case VCONN_SWAP_TURN_OFF_VCONN: | |
3524 | tcpm_set_vconn(port, false); | |
f0690a25 GR |
3525 | tcpm_set_state(port, ready_state(port), 0); |
3526 | break; | |
3527 | ||
3528 | case DR_SWAP_CANCEL: | |
3529 | case PR_SWAP_CANCEL: | |
3530 | case VCONN_SWAP_CANCEL: | |
3531 | tcpm_swap_complete(port, port->swap_status); | |
3532 | if (port->pwr_role == TYPEC_SOURCE) | |
3533 | tcpm_set_state(port, SRC_READY, 0); | |
3534 | else | |
3535 | tcpm_set_state(port, SNK_READY, 0); | |
3536 | break; | |
3537 | ||
3538 | case BIST_RX: | |
3539 | switch (BDO_MODE_MASK(port->bist_request)) { | |
3540 | case BDO_MODE_CARRIER2: | |
3541 | tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL); | |
3542 | break; | |
3543 | default: | |
3544 | break; | |
3545 | } | |
3546 | /* Always switch to unattached state */ | |
3547 | tcpm_set_state(port, unattached_state(port), 0); | |
3548 | break; | |
64f7c494 AT |
3549 | case GET_STATUS_SEND: |
3550 | tcpm_pd_send_control(port, PD_CTRL_GET_STATUS); | |
3551 | tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT, | |
3552 | PD_T_SENDER_RESPONSE); | |
3553 | break; | |
3554 | case GET_STATUS_SEND_TIMEOUT: | |
3555 | tcpm_set_state(port, ready_state(port), 0); | |
3556 | break; | |
3557 | case GET_PPS_STATUS_SEND: | |
3558 | tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS); | |
3559 | tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT, | |
3560 | PD_T_SENDER_RESPONSE); | |
3561 | break; | |
3562 | case GET_PPS_STATUS_SEND_TIMEOUT: | |
3563 | tcpm_set_state(port, ready_state(port), 0); | |
3564 | break; | |
f0690a25 GR |
3565 | case ERROR_RECOVERY: |
3566 | tcpm_swap_complete(port, -EPROTO); | |
2eadc33f | 3567 | tcpm_pps_complete(port, -EPROTO); |
b17dd571 GR |
3568 | tcpm_set_state(port, PORT_RESET, 0); |
3569 | break; | |
3570 | case PORT_RESET: | |
f0690a25 | 3571 | tcpm_reset_port(port); |
f0690a25 | 3572 | tcpm_set_cc(port, TYPEC_CC_OPEN); |
b17dd571 | 3573 | tcpm_set_state(port, PORT_RESET_WAIT_OFF, |
f0690a25 GR |
3574 | PD_T_ERROR_RECOVERY); |
3575 | break; | |
b17dd571 | 3576 | case PORT_RESET_WAIT_OFF: |
f0690a25 GR |
3577 | tcpm_set_state(port, |
3578 | tcpm_default_state(port), | |
3579 | port->vbus_present ? PD_T_PS_SOURCE_OFF : 0); | |
3580 | break; | |
3581 | default: | |
3582 | WARN(1, "Unexpected port state %d\n", port->state); | |
3583 | break; | |
3584 | } | |
3585 | } | |
3586 | ||
3587 | static void tcpm_state_machine_work(struct work_struct *work) | |
3588 | { | |
3589 | struct tcpm_port *port = container_of(work, struct tcpm_port, | |
3590 | state_machine.work); | |
3591 | enum tcpm_state prev_state; | |
3592 | ||
3593 | mutex_lock(&port->lock); | |
3594 | port->state_machine_running = true; | |
3595 | ||
3596 | if (port->queued_message && tcpm_send_queued_message(port)) | |
3597 | goto done; | |
3598 | ||
3599 | /* If we were queued due to a delayed state change, update it now */ | |
3600 | if (port->delayed_state) { | |
3601 | tcpm_log(port, "state change %s -> %s [delayed %ld ms]", | |
3602 | tcpm_states[port->state], | |
3603 | tcpm_states[port->delayed_state], port->delay_ms); | |
3604 | port->prev_state = port->state; | |
3605 | port->state = port->delayed_state; | |
3606 | port->delayed_state = INVALID_STATE; | |
3607 | } | |
3608 | ||
3609 | /* | |
3610 | * Continue running as long as we have (non-delayed) state changes | |
3611 | * to make. | |
3612 | */ | |
3613 | do { | |
3614 | prev_state = port->state; | |
3615 | run_state_machine(port); | |
3616 | if (port->queued_message) | |
3617 | tcpm_send_queued_message(port); | |
3618 | } while (port->state != prev_state && !port->delayed_state); | |
3619 | ||
3620 | done: | |
3621 | port->state_machine_running = false; | |
3622 | mutex_unlock(&port->lock); | |
3623 | } | |
3624 | ||
3625 | static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1, | |
3626 | enum typec_cc_status cc2) | |
3627 | { | |
3628 | enum typec_cc_status old_cc1, old_cc2; | |
3629 | enum tcpm_state new_state; | |
3630 | ||
3631 | old_cc1 = port->cc1; | |
3632 | old_cc2 = port->cc2; | |
3633 | port->cc1 = cc1; | |
3634 | port->cc2 = cc2; | |
3635 | ||
3636 | tcpm_log_force(port, | |
3637 | "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]", | |
3638 | old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state], | |
3639 | port->polarity, | |
3640 | tcpm_port_is_disconnected(port) ? "disconnected" | |
3641 | : "connected"); | |
3642 | ||
3643 | switch (port->state) { | |
7893f9e1 | 3644 | case TOGGLING: |
f0690a25 GR |
3645 | if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) || |
3646 | tcpm_port_is_source(port)) | |
3647 | tcpm_set_state(port, SRC_ATTACH_WAIT, 0); | |
3648 | else if (tcpm_port_is_sink(port)) | |
3649 | tcpm_set_state(port, SNK_ATTACH_WAIT, 0); | |
3650 | break; | |
3651 | case SRC_UNATTACHED: | |
3652 | case ACC_UNATTACHED: | |
3653 | if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) || | |
3654 | tcpm_port_is_source(port)) | |
3655 | tcpm_set_state(port, SRC_ATTACH_WAIT, 0); | |
3656 | break; | |
3657 | case SRC_ATTACH_WAIT: | |
3658 | if (tcpm_port_is_disconnected(port) || | |
3659 | tcpm_port_is_audio_detached(port)) | |
3660 | tcpm_set_state(port, SRC_UNATTACHED, 0); | |
3661 | else if (cc1 != old_cc1 || cc2 != old_cc2) | |
3662 | tcpm_set_state(port, SRC_ATTACH_WAIT, 0); | |
3663 | break; | |
3664 | case SRC_ATTACHED: | |
f3b73364 BJS |
3665 | case SRC_SEND_CAPABILITIES: |
3666 | case SRC_READY: | |
3667 | if (tcpm_port_is_disconnected(port) || | |
3668 | !tcpm_port_is_source(port)) | |
f0690a25 GR |
3669 | tcpm_set_state(port, SRC_UNATTACHED, 0); |
3670 | break; | |
f0690a25 GR |
3671 | case SNK_UNATTACHED: |
3672 | if (tcpm_port_is_sink(port)) | |
3673 | tcpm_set_state(port, SNK_ATTACH_WAIT, 0); | |
3674 | break; | |
3675 | case SNK_ATTACH_WAIT: | |
3676 | if ((port->cc1 == TYPEC_CC_OPEN && | |
3677 | port->cc2 != TYPEC_CC_OPEN) || | |
3678 | (port->cc1 != TYPEC_CC_OPEN && | |
3679 | port->cc2 == TYPEC_CC_OPEN)) | |
3680 | new_state = SNK_DEBOUNCED; | |
3681 | else if (tcpm_port_is_disconnected(port)) | |
3682 | new_state = SNK_UNATTACHED; | |
3683 | else | |
3684 | break; | |
3685 | if (new_state != port->delayed_state) | |
3686 | tcpm_set_state(port, SNK_ATTACH_WAIT, 0); | |
3687 | break; | |
3688 | case SNK_DEBOUNCED: | |
3689 | if (tcpm_port_is_disconnected(port)) | |
3690 | new_state = SNK_UNATTACHED; | |
3691 | else if (port->vbus_present) | |
3692 | new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED; | |
3693 | else | |
3694 | new_state = SNK_UNATTACHED; | |
3695 | if (new_state != port->delayed_state) | |
3696 | tcpm_set_state(port, SNK_DEBOUNCED, 0); | |
3697 | break; | |
3698 | case SNK_READY: | |
3699 | if (tcpm_port_is_disconnected(port)) | |
3700 | tcpm_set_state(port, unattached_state(port), 0); | |
3701 | else if (!port->pd_capable && | |
3702 | (cc1 != old_cc1 || cc2 != old_cc2)) | |
3703 | tcpm_set_current_limit(port, | |
3704 | tcpm_get_current_limit(port), | |
3705 | 5000); | |
3706 | break; | |
3707 | ||
3708 | case AUDIO_ACC_ATTACHED: | |
3709 | if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN) | |
3710 | tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0); | |
3711 | break; | |
3712 | case AUDIO_ACC_DEBOUNCE: | |
3713 | if (tcpm_port_is_audio(port)) | |
3714 | tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0); | |
3715 | break; | |
3716 | ||
3717 | case DEBUG_ACC_ATTACHED: | |
3718 | if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN) | |
3719 | tcpm_set_state(port, ACC_UNATTACHED, 0); | |
3720 | break; | |
3721 | ||
3722 | case SNK_TRY: | |
3723 | /* Do nothing, waiting for timeout */ | |
3724 | break; | |
3725 | ||
3726 | case SNK_DISCOVERY: | |
3727 | /* CC line is unstable, wait for debounce */ | |
3728 | if (tcpm_port_is_disconnected(port)) | |
3729 | tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0); | |
3730 | break; | |
3731 | case SNK_DISCOVERY_DEBOUNCE: | |
3732 | break; | |
3733 | ||
3734 | case SRC_TRYWAIT: | |
3735 | /* Hand over to state machine if needed */ | |
3736 | if (!port->vbus_present && tcpm_port_is_source(port)) | |
02d5be46 BJS |
3737 | tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0); |
3738 | break; | |
3739 | case SRC_TRYWAIT_DEBOUNCE: | |
3740 | if (port->vbus_present || !tcpm_port_is_source(port)) | |
f0690a25 GR |
3741 | tcpm_set_state(port, SRC_TRYWAIT, 0); |
3742 | break; | |
a0a3e04e BJS |
3743 | case SNK_TRY_WAIT_DEBOUNCE: |
3744 | if (!tcpm_port_is_sink(port)) { | |
3745 | port->max_wait = 0; | |
3746 | tcpm_set_state(port, SRC_TRYWAIT, 0); | |
f0690a25 | 3747 | } |
f0690a25 | 3748 | break; |
131c7d12 | 3749 | case SRC_TRY_WAIT: |
c79d92bd BJS |
3750 | if (tcpm_port_is_source(port)) |
3751 | tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0); | |
f0690a25 GR |
3752 | break; |
3753 | case SRC_TRY_DEBOUNCE: | |
131c7d12 | 3754 | tcpm_set_state(port, SRC_TRY_WAIT, 0); |
f0690a25 GR |
3755 | break; |
3756 | case SNK_TRYWAIT_DEBOUNCE: | |
af450ebb BJS |
3757 | if (tcpm_port_is_sink(port)) |
3758 | tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0); | |
3759 | break; | |
3760 | case SNK_TRYWAIT_VBUS: | |
3761 | if (!tcpm_port_is_sink(port)) | |
f0690a25 GR |
3762 | tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0); |
3763 | break; | |
af450ebb BJS |
3764 | case SNK_TRYWAIT: |
3765 | /* Do nothing, waiting for tCCDebounce */ | |
3766 | break; | |
f0690a25 GR |
3767 | case PR_SWAP_SNK_SRC_SINK_OFF: |
3768 | case PR_SWAP_SRC_SNK_TRANSITION_OFF: | |
3769 | case PR_SWAP_SRC_SNK_SOURCE_OFF: | |
b965b631 BJS |
3770 | case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED: |
3771 | case PR_SWAP_SNK_SRC_SOURCE_ON: | |
f0690a25 | 3772 | /* |
b965b631 | 3773 | * CC state change is expected in PR_SWAP |
f0690a25 GR |
3774 | * Ignore it. |
3775 | */ | |
3776 | break; | |
3777 | ||
3778 | default: | |
3779 | if (tcpm_port_is_disconnected(port)) | |
3780 | tcpm_set_state(port, unattached_state(port), 0); | |
3781 | break; | |
3782 | } | |
3783 | } | |
3784 | ||
3785 | static void _tcpm_pd_vbus_on(struct tcpm_port *port) | |
3786 | { | |
f0690a25 GR |
3787 | tcpm_log_force(port, "VBUS on"); |
3788 | port->vbus_present = true; | |
3789 | switch (port->state) { | |
3790 | case SNK_TRANSITION_SINK_VBUS: | |
8bf05746 | 3791 | port->explicit_contract = true; |
f0690a25 GR |
3792 | tcpm_set_state(port, SNK_READY, 0); |
3793 | break; | |
3794 | case SNK_DISCOVERY: | |
3795 | tcpm_set_state(port, SNK_DISCOVERY, 0); | |
3796 | break; | |
3797 | ||
3798 | case SNK_DEBOUNCED: | |
3799 | tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY | |
3800 | : SNK_ATTACHED, | |
3801 | 0); | |
3802 | break; | |
3803 | case SNK_HARD_RESET_WAIT_VBUS: | |
3804 | tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0); | |
3805 | break; | |
3806 | case SRC_ATTACHED: | |
3807 | tcpm_set_state(port, SRC_STARTUP, 0); | |
3808 | break; | |
3809 | case SRC_HARD_RESET_VBUS_ON: | |
3810 | tcpm_set_state(port, SRC_STARTUP, 0); | |
3811 | break; | |
3812 | ||
3813 | case SNK_TRY: | |
3814 | /* Do nothing, waiting for timeout */ | |
3815 | break; | |
3816 | case SRC_TRYWAIT: | |
02d5be46 BJS |
3817 | /* Do nothing, Waiting for Rd to be detected */ |
3818 | break; | |
3819 | case SRC_TRYWAIT_DEBOUNCE: | |
3820 | tcpm_set_state(port, SRC_TRYWAIT, 0); | |
f0690a25 | 3821 | break; |
a0a3e04e BJS |
3822 | case SNK_TRY_WAIT_DEBOUNCE: |
3823 | /* Do nothing, waiting for PD_DEBOUNCE to do be done */ | |
f0690a25 GR |
3824 | break; |
3825 | case SNK_TRYWAIT: | |
af450ebb BJS |
3826 | /* Do nothing, waiting for tCCDebounce */ |
3827 | break; | |
3828 | case SNK_TRYWAIT_VBUS: | |
3829 | if (tcpm_port_is_sink(port)) | |
3830 | tcpm_set_state(port, SNK_ATTACHED, 0); | |
3831 | break; | |
3832 | case SNK_TRYWAIT_DEBOUNCE: | |
3833 | /* Do nothing, waiting for Rp */ | |
f0690a25 | 3834 | break; |
131c7d12 BJS |
3835 | case SRC_TRY_WAIT: |
3836 | case SRC_TRY_DEBOUNCE: | |
3837 | /* Do nothing, waiting for sink detection */ | |
3838 | break; | |
f0690a25 GR |
3839 | default: |
3840 | break; | |
3841 | } | |
3842 | } | |
3843 | ||
3844 | static void _tcpm_pd_vbus_off(struct tcpm_port *port) | |
3845 | { | |
f0690a25 GR |
3846 | tcpm_log_force(port, "VBUS off"); |
3847 | port->vbus_present = false; | |
3848 | port->vbus_never_low = false; | |
3849 | switch (port->state) { | |
3850 | case SNK_HARD_RESET_SINK_OFF: | |
3851 | tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0); | |
3852 | break; | |
3853 | case SRC_HARD_RESET_VBUS_OFF: | |
3854 | tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, 0); | |
3855 | break; | |
3856 | case HARD_RESET_SEND: | |
3857 | break; | |
3858 | ||
3859 | case SNK_TRY: | |
3860 | /* Do nothing, waiting for timeout */ | |
3861 | break; | |
3862 | case SRC_TRYWAIT: | |
3863 | /* Hand over to state machine if needed */ | |
3864 | if (tcpm_port_is_source(port)) | |
02d5be46 | 3865 | tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0); |
f0690a25 | 3866 | break; |
a0a3e04e BJS |
3867 | case SNK_TRY_WAIT_DEBOUNCE: |
3868 | /* Do nothing, waiting for PD_DEBOUNCE to do be done */ | |
f0690a25 | 3869 | break; |
af450ebb | 3870 | case SNK_TRYWAIT: |
f0690a25 | 3871 | case SNK_TRYWAIT_VBUS: |
af450ebb | 3872 | case SNK_TRYWAIT_DEBOUNCE: |
f0690a25 | 3873 | break; |
f0690a25 GR |
3874 | case SNK_ATTACH_WAIT: |
3875 | tcpm_set_state(port, SNK_UNATTACHED, 0); | |
3876 | break; | |
3877 | ||
3878 | case SNK_NEGOTIATE_CAPABILITIES: | |
3879 | break; | |
3880 | ||
3881 | case PR_SWAP_SRC_SNK_TRANSITION_OFF: | |
3882 | tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0); | |
3883 | break; | |
3884 | ||
3885 | case PR_SWAP_SNK_SRC_SINK_OFF: | |
3886 | /* Do nothing, expected */ | |
3887 | break; | |
3888 | ||
b17dd571 | 3889 | case PORT_RESET_WAIT_OFF: |
c749d4d0 | 3890 | tcpm_set_state(port, tcpm_default_state(port), 0); |
f0690a25 | 3891 | break; |
131c7d12 BJS |
3892 | case SRC_TRY_WAIT: |
3893 | case SRC_TRY_DEBOUNCE: | |
3894 | /* Do nothing, waiting for sink detection */ | |
3895 | break; | |
f0690a25 GR |
3896 | default: |
3897 | if (port->pwr_role == TYPEC_SINK && | |
3898 | port->attached) | |
3899 | tcpm_set_state(port, SNK_UNATTACHED, 0); | |
3900 | break; | |
3901 | } | |
3902 | } | |
3903 | ||
3904 | static void _tcpm_pd_hard_reset(struct tcpm_port *port) | |
3905 | { | |
3906 | tcpm_log_force(port, "Received hard reset"); | |
3907 | /* | |
3908 | * If we keep receiving hard reset requests, executing the hard reset | |
3909 | * must have failed. Revert to error recovery if that happens. | |
3910 | */ | |
3911 | tcpm_set_state(port, | |
3912 | port->hard_reset_count < PD_N_HARD_RESET_COUNT ? | |
3913 | HARD_RESET_START : ERROR_RECOVERY, | |
3914 | 0); | |
3915 | } | |
3916 | ||
3917 | static void tcpm_pd_event_handler(struct work_struct *work) | |
3918 | { | |
3919 | struct tcpm_port *port = container_of(work, struct tcpm_port, | |
3920 | event_work); | |
3921 | u32 events; | |
3922 | ||
3923 | mutex_lock(&port->lock); | |
3924 | ||
3925 | spin_lock(&port->pd_event_lock); | |
3926 | while (port->pd_events) { | |
3927 | events = port->pd_events; | |
3928 | port->pd_events = 0; | |
3929 | spin_unlock(&port->pd_event_lock); | |
3930 | if (events & TCPM_RESET_EVENT) | |
3931 | _tcpm_pd_hard_reset(port); | |
3932 | if (events & TCPM_VBUS_EVENT) { | |
3933 | bool vbus; | |
3934 | ||
3935 | vbus = port->tcpc->get_vbus(port->tcpc); | |
3936 | if (vbus) | |
3937 | _tcpm_pd_vbus_on(port); | |
3938 | else | |
3939 | _tcpm_pd_vbus_off(port); | |
3940 | } | |
3941 | if (events & TCPM_CC_EVENT) { | |
3942 | enum typec_cc_status cc1, cc2; | |
3943 | ||
3944 | if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0) | |
3945 | _tcpm_cc_change(port, cc1, cc2); | |
3946 | } | |
3947 | spin_lock(&port->pd_event_lock); | |
3948 | } | |
3949 | spin_unlock(&port->pd_event_lock); | |
3950 | mutex_unlock(&port->lock); | |
3951 | } | |
3952 | ||
3953 | void tcpm_cc_change(struct tcpm_port *port) | |
3954 | { | |
3955 | spin_lock(&port->pd_event_lock); | |
3956 | port->pd_events |= TCPM_CC_EVENT; | |
3957 | spin_unlock(&port->pd_event_lock); | |
3958 | queue_work(port->wq, &port->event_work); | |
3959 | } | |
3960 | EXPORT_SYMBOL_GPL(tcpm_cc_change); | |
3961 | ||
3962 | void tcpm_vbus_change(struct tcpm_port *port) | |
3963 | { | |
3964 | spin_lock(&port->pd_event_lock); | |
3965 | port->pd_events |= TCPM_VBUS_EVENT; | |
3966 | spin_unlock(&port->pd_event_lock); | |
3967 | queue_work(port->wq, &port->event_work); | |
3968 | } | |
3969 | EXPORT_SYMBOL_GPL(tcpm_vbus_change); | |
3970 | ||
3971 | void tcpm_pd_hard_reset(struct tcpm_port *port) | |
3972 | { | |
3973 | spin_lock(&port->pd_event_lock); | |
3974 | port->pd_events = TCPM_RESET_EVENT; | |
3975 | spin_unlock(&port->pd_event_lock); | |
3976 | queue_work(port->wq, &port->event_work); | |
3977 | } | |
3978 | EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset); | |
3979 | ||
3980 | static int tcpm_dr_set(const struct typec_capability *cap, | |
3981 | enum typec_data_role data) | |
3982 | { | |
3983 | struct tcpm_port *port = typec_cap_to_tcpm(cap); | |
3984 | int ret; | |
3985 | ||
3986 | mutex_lock(&port->swap_lock); | |
3987 | mutex_lock(&port->lock); | |
3988 | ||
9b0ae699 | 3989 | if (port->port_type != TYPEC_PORT_DRP) { |
f0690a25 GR |
3990 | ret = -EINVAL; |
3991 | goto port_unlock; | |
3992 | } | |
3993 | if (port->state != SRC_READY && port->state != SNK_READY) { | |
3994 | ret = -EAGAIN; | |
3995 | goto port_unlock; | |
3996 | } | |
3997 | ||
3998 | if (port->data_role == data) { | |
3999 | ret = 0; | |
4000 | goto port_unlock; | |
4001 | } | |
4002 | ||
4003 | /* | |
4004 | * XXX | |
4005 | * 6.3.9: If an alternate mode is active, a request to swap | |
4006 | * alternate modes shall trigger a port reset. | |
4007 | * Reject data role swap request in this case. | |
4008 | */ | |
4009 | ||
b17dd571 GR |
4010 | if (!port->pd_capable) { |
4011 | /* | |
4012 | * If the partner is not PD capable, reset the port to | |
4013 | * trigger a role change. This can only work if a preferred | |
4014 | * role is configured, and if it matches the requested role. | |
4015 | */ | |
4016 | if (port->try_role == TYPEC_NO_PREFERRED_ROLE || | |
4017 | port->try_role == port->pwr_role) { | |
4018 | ret = -EINVAL; | |
4019 | goto port_unlock; | |
4020 | } | |
4021 | port->non_pd_role_swap = true; | |
4022 | tcpm_set_state(port, PORT_RESET, 0); | |
4023 | } else { | |
4024 | tcpm_set_state(port, DR_SWAP_SEND, 0); | |
4025 | } | |
4026 | ||
f0690a25 GR |
4027 | port->swap_status = 0; |
4028 | port->swap_pending = true; | |
4029 | reinit_completion(&port->swap_complete); | |
f0690a25 GR |
4030 | mutex_unlock(&port->lock); |
4031 | ||
9adf9f9e GR |
4032 | if (!wait_for_completion_timeout(&port->swap_complete, |
4033 | msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT))) | |
4034 | ret = -ETIMEDOUT; | |
4035 | else | |
4036 | ret = port->swap_status; | |
f0690a25 | 4037 | |
b17dd571 | 4038 | port->non_pd_role_swap = false; |
f0690a25 GR |
4039 | goto swap_unlock; |
4040 | ||
4041 | port_unlock: | |
4042 | mutex_unlock(&port->lock); | |
4043 | swap_unlock: | |
4044 | mutex_unlock(&port->swap_lock); | |
4045 | return ret; | |
4046 | } | |
4047 | ||
4048 | static int tcpm_pr_set(const struct typec_capability *cap, | |
4049 | enum typec_role role) | |
4050 | { | |
4051 | struct tcpm_port *port = typec_cap_to_tcpm(cap); | |
4052 | int ret; | |
4053 | ||
4054 | mutex_lock(&port->swap_lock); | |
4055 | mutex_lock(&port->lock); | |
4056 | ||
9b0ae699 | 4057 | if (port->port_type != TYPEC_PORT_DRP) { |
f0690a25 GR |
4058 | ret = -EINVAL; |
4059 | goto port_unlock; | |
4060 | } | |
4061 | if (port->state != SRC_READY && port->state != SNK_READY) { | |
4062 | ret = -EAGAIN; | |
4063 | goto port_unlock; | |
4064 | } | |
4065 | ||
4066 | if (role == port->pwr_role) { | |
4067 | ret = 0; | |
4068 | goto port_unlock; | |
4069 | } | |
4070 | ||
f0690a25 GR |
4071 | port->swap_status = 0; |
4072 | port->swap_pending = true; | |
4073 | reinit_completion(&port->swap_complete); | |
4074 | tcpm_set_state(port, PR_SWAP_SEND, 0); | |
4075 | mutex_unlock(&port->lock); | |
4076 | ||
9adf9f9e GR |
4077 | if (!wait_for_completion_timeout(&port->swap_complete, |
4078 | msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT))) | |
4079 | ret = -ETIMEDOUT; | |
4080 | else | |
4081 | ret = port->swap_status; | |
f0690a25 | 4082 | |
f0690a25 GR |
4083 | goto swap_unlock; |
4084 | ||
4085 | port_unlock: | |
4086 | mutex_unlock(&port->lock); | |
4087 | swap_unlock: | |
4088 | mutex_unlock(&port->swap_lock); | |
4089 | return ret; | |
4090 | } | |
4091 | ||
4092 | static int tcpm_vconn_set(const struct typec_capability *cap, | |
4093 | enum typec_role role) | |
4094 | { | |
4095 | struct tcpm_port *port = typec_cap_to_tcpm(cap); | |
4096 | int ret; | |
4097 | ||
4098 | mutex_lock(&port->swap_lock); | |
4099 | mutex_lock(&port->lock); | |
4100 | ||
4101 | if (port->state != SRC_READY && port->state != SNK_READY) { | |
4102 | ret = -EAGAIN; | |
4103 | goto port_unlock; | |
4104 | } | |
4105 | ||
4106 | if (role == port->vconn_role) { | |
4107 | ret = 0; | |
4108 | goto port_unlock; | |
4109 | } | |
4110 | ||
4111 | port->swap_status = 0; | |
4112 | port->swap_pending = true; | |
4113 | reinit_completion(&port->swap_complete); | |
4114 | tcpm_set_state(port, VCONN_SWAP_SEND, 0); | |
4115 | mutex_unlock(&port->lock); | |
4116 | ||
9adf9f9e GR |
4117 | if (!wait_for_completion_timeout(&port->swap_complete, |
4118 | msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT))) | |
4119 | ret = -ETIMEDOUT; | |
4120 | else | |
4121 | ret = port->swap_status; | |
f0690a25 | 4122 | |
f0690a25 GR |
4123 | goto swap_unlock; |
4124 | ||
4125 | port_unlock: | |
4126 | mutex_unlock(&port->lock); | |
4127 | swap_unlock: | |
4128 | mutex_unlock(&port->swap_lock); | |
4129 | return ret; | |
4130 | } | |
4131 | ||
4132 | static int tcpm_try_role(const struct typec_capability *cap, int role) | |
4133 | { | |
4134 | struct tcpm_port *port = typec_cap_to_tcpm(cap); | |
4135 | struct tcpc_dev *tcpc = port->tcpc; | |
4136 | int ret = 0; | |
4137 | ||
4138 | mutex_lock(&port->lock); | |
4139 | if (tcpc->try_role) | |
4140 | ret = tcpc->try_role(tcpc, role); | |
1957de95 | 4141 | if (!ret && (!tcpc->config || !tcpc->config->try_role_hw)) |
f0690a25 GR |
4142 | port->try_role = role; |
4143 | port->try_src_count = 0; | |
4144 | port->try_snk_count = 0; | |
4145 | mutex_unlock(&port->lock); | |
4146 | ||
4147 | return ret; | |
4148 | } | |
4149 | ||
f2a8aa05 | 4150 | static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr) |
2eadc33f AT |
4151 | { |
4152 | unsigned int target_mw; | |
4153 | int ret; | |
4154 | ||
4155 | mutex_lock(&port->swap_lock); | |
4156 | mutex_lock(&port->lock); | |
4157 | ||
4158 | if (!port->pps_data.active) { | |
4159 | ret = -EOPNOTSUPP; | |
4160 | goto port_unlock; | |
4161 | } | |
4162 | ||
4163 | if (port->state != SNK_READY) { | |
4164 | ret = -EAGAIN; | |
4165 | goto port_unlock; | |
4166 | } | |
4167 | ||
4168 | if (op_curr > port->pps_data.max_curr) { | |
4169 | ret = -EINVAL; | |
4170 | goto port_unlock; | |
4171 | } | |
4172 | ||
4173 | target_mw = (op_curr * port->pps_data.out_volt) / 1000; | |
4174 | if (target_mw < port->operating_snk_mw) { | |
4175 | ret = -EINVAL; | |
4176 | goto port_unlock; | |
4177 | } | |
4178 | ||
554fab6d AT |
4179 | /* Round down operating current to align with PPS valid steps */ |
4180 | op_curr = op_curr - (op_curr % RDO_PROG_CURR_MA_STEP); | |
4181 | ||
2eadc33f AT |
4182 | reinit_completion(&port->pps_complete); |
4183 | port->pps_data.op_curr = op_curr; | |
4184 | port->pps_status = 0; | |
4185 | port->pps_pending = true; | |
4186 | tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); | |
4187 | mutex_unlock(&port->lock); | |
4188 | ||
4189 | if (!wait_for_completion_timeout(&port->pps_complete, | |
4190 | msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) | |
4191 | ret = -ETIMEDOUT; | |
4192 | else | |
4193 | ret = port->pps_status; | |
4194 | ||
4195 | goto swap_unlock; | |
4196 | ||
4197 | port_unlock: | |
4198 | mutex_unlock(&port->lock); | |
4199 | swap_unlock: | |
4200 | mutex_unlock(&port->swap_lock); | |
4201 | ||
4202 | return ret; | |
4203 | } | |
4204 | ||
f2a8aa05 | 4205 | static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt) |
2eadc33f AT |
4206 | { |
4207 | unsigned int target_mw; | |
4208 | int ret; | |
4209 | ||
4210 | mutex_lock(&port->swap_lock); | |
4211 | mutex_lock(&port->lock); | |
4212 | ||
4213 | if (!port->pps_data.active) { | |
4214 | ret = -EOPNOTSUPP; | |
4215 | goto port_unlock; | |
4216 | } | |
4217 | ||
4218 | if (port->state != SNK_READY) { | |
4219 | ret = -EAGAIN; | |
4220 | goto port_unlock; | |
4221 | } | |
4222 | ||
4223 | if (out_volt < port->pps_data.min_volt || | |
4224 | out_volt > port->pps_data.max_volt) { | |
4225 | ret = -EINVAL; | |
4226 | goto port_unlock; | |
4227 | } | |
4228 | ||
4229 | target_mw = (port->pps_data.op_curr * out_volt) / 1000; | |
4230 | if (target_mw < port->operating_snk_mw) { | |
4231 | ret = -EINVAL; | |
4232 | goto port_unlock; | |
4233 | } | |
4234 | ||
554fab6d AT |
4235 | /* Round down output voltage to align with PPS valid steps */ |
4236 | out_volt = out_volt - (out_volt % RDO_PROG_VOLT_MV_STEP); | |
4237 | ||
2eadc33f AT |
4238 | reinit_completion(&port->pps_complete); |
4239 | port->pps_data.out_volt = out_volt; | |
4240 | port->pps_status = 0; | |
4241 | port->pps_pending = true; | |
4242 | tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); | |
4243 | mutex_unlock(&port->lock); | |
4244 | ||
4245 | if (!wait_for_completion_timeout(&port->pps_complete, | |
4246 | msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) | |
4247 | ret = -ETIMEDOUT; | |
4248 | else | |
4249 | ret = port->pps_status; | |
4250 | ||
4251 | goto swap_unlock; | |
4252 | ||
4253 | port_unlock: | |
4254 | mutex_unlock(&port->lock); | |
4255 | swap_unlock: | |
4256 | mutex_unlock(&port->swap_lock); | |
4257 | ||
4258 | return ret; | |
4259 | } | |
4260 | ||
f2a8aa05 | 4261 | static int tcpm_pps_activate(struct tcpm_port *port, bool activate) |
2eadc33f AT |
4262 | { |
4263 | int ret = 0; | |
4264 | ||
4265 | mutex_lock(&port->swap_lock); | |
4266 | mutex_lock(&port->lock); | |
4267 | ||
4268 | if (!port->pps_data.supported) { | |
4269 | ret = -EOPNOTSUPP; | |
4270 | goto port_unlock; | |
4271 | } | |
4272 | ||
4273 | /* Trying to deactivate PPS when already deactivated so just bail */ | |
4274 | if (!port->pps_data.active && !activate) | |
4275 | goto port_unlock; | |
4276 | ||
4277 | if (port->state != SNK_READY) { | |
4278 | ret = -EAGAIN; | |
4279 | goto port_unlock; | |
4280 | } | |
4281 | ||
4282 | reinit_completion(&port->pps_complete); | |
4283 | port->pps_status = 0; | |
4284 | port->pps_pending = true; | |
4285 | ||
4286 | /* Trigger PPS request or move back to standard PDO contract */ | |
4287 | if (activate) { | |
4288 | port->pps_data.out_volt = port->supply_voltage; | |
4289 | port->pps_data.op_curr = port->current_limit; | |
4290 | tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0); | |
4291 | } else { | |
4292 | tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0); | |
4293 | } | |
4294 | mutex_unlock(&port->lock); | |
4295 | ||
4296 | if (!wait_for_completion_timeout(&port->pps_complete, | |
4297 | msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT))) | |
4298 | ret = -ETIMEDOUT; | |
4299 | else | |
4300 | ret = port->pps_status; | |
4301 | ||
4302 | goto swap_unlock; | |
4303 | ||
4304 | port_unlock: | |
4305 | mutex_unlock(&port->lock); | |
4306 | swap_unlock: | |
4307 | mutex_unlock(&port->swap_lock); | |
4308 | ||
4309 | return ret; | |
4310 | } | |
4311 | ||
f0690a25 GR |
4312 | static void tcpm_init(struct tcpm_port *port) |
4313 | { | |
4314 | enum typec_cc_status cc1, cc2; | |
4315 | ||
4316 | port->tcpc->init(port->tcpc); | |
4317 | ||
4318 | tcpm_reset_port(port); | |
4319 | ||
4320 | /* | |
4321 | * XXX | |
4322 | * Should possibly wait for VBUS to settle if it was enabled locally | |
4323 | * since tcpm_reset_port() will disable VBUS. | |
4324 | */ | |
4325 | port->vbus_present = port->tcpc->get_vbus(port->tcpc); | |
4326 | if (port->vbus_present) | |
4327 | port->vbus_never_low = true; | |
4328 | ||
4329 | tcpm_set_state(port, tcpm_default_state(port), 0); | |
4330 | ||
4331 | if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0) | |
4332 | _tcpm_cc_change(port, cc1, cc2); | |
4333 | ||
4334 | /* | |
4335 | * Some adapters need a clean slate at startup, and won't recover | |
4336 | * otherwise. So do not try to be fancy and force a clean disconnect. | |
4337 | */ | |
b17dd571 | 4338 | tcpm_set_state(port, PORT_RESET, 0); |
f0690a25 GR |
4339 | } |
4340 | ||
9b0ae699 BJS |
4341 | static int tcpm_port_type_set(const struct typec_capability *cap, |
4342 | enum typec_port_type type) | |
4343 | { | |
4344 | struct tcpm_port *port = typec_cap_to_tcpm(cap); | |
4345 | ||
4346 | mutex_lock(&port->lock); | |
4347 | if (type == port->port_type) | |
4348 | goto port_unlock; | |
4349 | ||
4350 | port->port_type = type; | |
4351 | ||
4352 | if (!port->connected) { | |
4353 | tcpm_set_state(port, PORT_RESET, 0); | |
ceeb1625 | 4354 | } else if (type == TYPEC_PORT_SNK) { |
9b0ae699 BJS |
4355 | if (!(port->pwr_role == TYPEC_SINK && |
4356 | port->data_role == TYPEC_DEVICE)) | |
4357 | tcpm_set_state(port, PORT_RESET, 0); | |
ceeb1625 | 4358 | } else if (type == TYPEC_PORT_SRC) { |
9b0ae699 BJS |
4359 | if (!(port->pwr_role == TYPEC_SOURCE && |
4360 | port->data_role == TYPEC_HOST)) | |
4361 | tcpm_set_state(port, PORT_RESET, 0); | |
4362 | } | |
4363 | ||
4364 | port_unlock: | |
4365 | mutex_unlock(&port->lock); | |
4366 | return 0; | |
4367 | } | |
4368 | ||
f0690a25 GR |
4369 | void tcpm_tcpc_reset(struct tcpm_port *port) |
4370 | { | |
4371 | mutex_lock(&port->lock); | |
4372 | /* XXX: Maintain PD connection if possible? */ | |
4373 | tcpm_init(port); | |
4374 | mutex_unlock(&port->lock); | |
4375 | } | |
4376 | EXPORT_SYMBOL_GPL(tcpm_tcpc_reset); | |
4377 | ||
4378 | static int tcpm_copy_pdos(u32 *dest_pdo, const u32 *src_pdo, | |
4379 | unsigned int nr_pdo) | |
4380 | { | |
4381 | unsigned int i; | |
4382 | ||
4383 | if (nr_pdo > PDO_MAX_OBJECTS) | |
4384 | nr_pdo = PDO_MAX_OBJECTS; | |
4385 | ||
4386 | for (i = 0; i < nr_pdo; i++) | |
4387 | dest_pdo[i] = src_pdo[i]; | |
4388 | ||
4389 | return nr_pdo; | |
4390 | } | |
4391 | ||
193a6801 GR |
4392 | static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo, |
4393 | unsigned int nr_vdo) | |
4394 | { | |
4395 | unsigned int i; | |
4396 | ||
4397 | if (nr_vdo > VDO_MAX_OBJECTS) | |
4398 | nr_vdo = VDO_MAX_OBJECTS; | |
4399 | ||
4400 | for (i = 0; i < nr_vdo; i++) | |
4401 | dest_vdo[i] = src_vdo[i]; | |
4402 | ||
4403 | return nr_vdo; | |
4404 | } | |
4405 | ||
96232cbc LJ |
4406 | static int tcpm_fw_get_caps(struct tcpm_port *port, |
4407 | struct fwnode_handle *fwnode) | |
4408 | { | |
4409 | const char *cap_str; | |
4410 | int ret; | |
4411 | u32 mw; | |
4412 | ||
4413 | if (!fwnode) | |
4414 | return -EINVAL; | |
4415 | ||
4416 | /* USB data support is optional */ | |
4417 | ret = fwnode_property_read_string(fwnode, "data-role", &cap_str); | |
4418 | if (ret == 0) { | |
4419 | port->typec_caps.data = typec_find_port_data_role(cap_str); | |
4420 | if (port->typec_caps.data < 0) | |
4421 | return -EINVAL; | |
4422 | } | |
4423 | ||
4424 | ret = fwnode_property_read_string(fwnode, "power-role", &cap_str); | |
4425 | if (ret < 0) | |
4426 | return ret; | |
4427 | ||
4428 | port->typec_caps.type = typec_find_port_power_role(cap_str); | |
4429 | if (port->typec_caps.type < 0) | |
4430 | return -EINVAL; | |
4431 | port->port_type = port->typec_caps.type; | |
4432 | ||
4433 | if (port->port_type == TYPEC_PORT_SNK) | |
4434 | goto sink; | |
4435 | ||
4436 | /* Get source pdos */ | |
4437 | ret = fwnode_property_read_u32_array(fwnode, "source-pdos", | |
4438 | NULL, 0); | |
4439 | if (ret <= 0) | |
4440 | return -EINVAL; | |
4441 | ||
4442 | port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS); | |
4443 | ret = fwnode_property_read_u32_array(fwnode, "source-pdos", | |
4444 | port->src_pdo, port->nr_src_pdo); | |
4445 | if ((ret < 0) || tcpm_validate_caps(port, port->src_pdo, | |
4446 | port->nr_src_pdo)) | |
4447 | return -EINVAL; | |
4448 | ||
4449 | if (port->port_type == TYPEC_PORT_SRC) | |
4450 | return 0; | |
4451 | ||
4452 | /* Get the preferred power role for DRP */ | |
4453 | ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str); | |
4454 | if (ret < 0) | |
4455 | return ret; | |
4456 | ||
4457 | port->typec_caps.prefer_role = typec_find_power_role(cap_str); | |
4458 | if (port->typec_caps.prefer_role < 0) | |
4459 | return -EINVAL; | |
4460 | sink: | |
4461 | /* Get sink pdos */ | |
4462 | ret = fwnode_property_read_u32_array(fwnode, "sink-pdos", | |
4463 | NULL, 0); | |
4464 | if (ret <= 0) | |
4465 | return -EINVAL; | |
4466 | ||
4467 | port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS); | |
4468 | ret = fwnode_property_read_u32_array(fwnode, "sink-pdos", | |
4469 | port->snk_pdo, port->nr_snk_pdo); | |
4470 | if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo, | |
4471 | port->nr_snk_pdo)) | |
4472 | return -EINVAL; | |
4473 | ||
4474 | if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0) | |
4475 | return -EINVAL; | |
4476 | port->operating_snk_mw = mw / 1000; | |
4477 | ||
23b5f732 BJS |
4478 | port->self_powered = fwnode_property_read_bool(fwnode, "self-powered"); |
4479 | ||
96232cbc LJ |
4480 | return 0; |
4481 | } | |
4482 | ||
f2a8aa05 AT |
4483 | /* Power Supply access to expose source power information */ |
4484 | enum tcpm_psy_online_states { | |
4485 | TCPM_PSY_OFFLINE = 0, | |
4486 | TCPM_PSY_FIXED_ONLINE, | |
4487 | TCPM_PSY_PROG_ONLINE, | |
4488 | }; | |
4489 | ||
4490 | static enum power_supply_property tcpm_psy_props[] = { | |
4491 | POWER_SUPPLY_PROP_USB_TYPE, | |
4492 | POWER_SUPPLY_PROP_ONLINE, | |
4493 | POWER_SUPPLY_PROP_VOLTAGE_MIN, | |
4494 | POWER_SUPPLY_PROP_VOLTAGE_MAX, | |
4495 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
4496 | POWER_SUPPLY_PROP_CURRENT_MAX, | |
4497 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
4498 | }; | |
4499 | ||
4500 | static int tcpm_psy_get_online(struct tcpm_port *port, | |
4501 | union power_supply_propval *val) | |
4502 | { | |
4503 | if (port->vbus_charge) { | |
4504 | if (port->pps_data.active) | |
4505 | val->intval = TCPM_PSY_PROG_ONLINE; | |
4506 | else | |
4507 | val->intval = TCPM_PSY_FIXED_ONLINE; | |
4508 | } else { | |
4509 | val->intval = TCPM_PSY_OFFLINE; | |
4510 | } | |
4511 | ||
4512 | return 0; | |
4513 | } | |
4514 | ||
4515 | static int tcpm_psy_get_voltage_min(struct tcpm_port *port, | |
4516 | union power_supply_propval *val) | |
4517 | { | |
4518 | if (port->pps_data.active) | |
4519 | val->intval = port->pps_data.min_volt * 1000; | |
4520 | else | |
4521 | val->intval = port->supply_voltage * 1000; | |
4522 | ||
4523 | return 0; | |
4524 | } | |
4525 | ||
4526 | static int tcpm_psy_get_voltage_max(struct tcpm_port *port, | |
4527 | union power_supply_propval *val) | |
4528 | { | |
4529 | if (port->pps_data.active) | |
4530 | val->intval = port->pps_data.max_volt * 1000; | |
4531 | else | |
4532 | val->intval = port->supply_voltage * 1000; | |
4533 | ||
4534 | return 0; | |
4535 | } | |
4536 | ||
4537 | static int tcpm_psy_get_voltage_now(struct tcpm_port *port, | |
4538 | union power_supply_propval *val) | |
4539 | { | |
4540 | val->intval = port->supply_voltage * 1000; | |
4541 | ||
4542 | return 0; | |
4543 | } | |
4544 | ||
4545 | static int tcpm_psy_get_current_max(struct tcpm_port *port, | |
4546 | union power_supply_propval *val) | |
4547 | { | |
4548 | if (port->pps_data.active) | |
4549 | val->intval = port->pps_data.max_curr * 1000; | |
4550 | else | |
4551 | val->intval = port->current_limit * 1000; | |
4552 | ||
4553 | return 0; | |
4554 | } | |
4555 | ||
4556 | static int tcpm_psy_get_current_now(struct tcpm_port *port, | |
4557 | union power_supply_propval *val) | |
4558 | { | |
4559 | val->intval = port->current_limit * 1000; | |
4560 | ||
4561 | return 0; | |
4562 | } | |
4563 | ||
4564 | static int tcpm_psy_get_prop(struct power_supply *psy, | |
4565 | enum power_supply_property psp, | |
4566 | union power_supply_propval *val) | |
4567 | { | |
4568 | struct tcpm_port *port = power_supply_get_drvdata(psy); | |
4569 | int ret = 0; | |
4570 | ||
4571 | switch (psp) { | |
4572 | case POWER_SUPPLY_PROP_USB_TYPE: | |
4573 | val->intval = port->usb_type; | |
4574 | break; | |
4575 | case POWER_SUPPLY_PROP_ONLINE: | |
4576 | ret = tcpm_psy_get_online(port, val); | |
4577 | break; | |
4578 | case POWER_SUPPLY_PROP_VOLTAGE_MIN: | |
4579 | ret = tcpm_psy_get_voltage_min(port, val); | |
4580 | break; | |
4581 | case POWER_SUPPLY_PROP_VOLTAGE_MAX: | |
4582 | ret = tcpm_psy_get_voltage_max(port, val); | |
4583 | break; | |
4584 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
4585 | ret = tcpm_psy_get_voltage_now(port, val); | |
4586 | break; | |
4587 | case POWER_SUPPLY_PROP_CURRENT_MAX: | |
4588 | ret = tcpm_psy_get_current_max(port, val); | |
4589 | break; | |
4590 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
4591 | ret = tcpm_psy_get_current_now(port, val); | |
4592 | break; | |
4593 | default: | |
4594 | ret = -EINVAL; | |
4595 | break; | |
4596 | } | |
4597 | ||
4598 | return ret; | |
4599 | } | |
4600 | ||
4601 | static int tcpm_psy_set_online(struct tcpm_port *port, | |
4602 | const union power_supply_propval *val) | |
4603 | { | |
4604 | int ret; | |
4605 | ||
4606 | switch (val->intval) { | |
4607 | case TCPM_PSY_FIXED_ONLINE: | |
4608 | ret = tcpm_pps_activate(port, false); | |
4609 | break; | |
4610 | case TCPM_PSY_PROG_ONLINE: | |
4611 | ret = tcpm_pps_activate(port, true); | |
4612 | break; | |
4613 | default: | |
4614 | ret = -EINVAL; | |
4615 | break; | |
4616 | } | |
4617 | ||
4618 | return ret; | |
4619 | } | |
4620 | ||
4621 | static int tcpm_psy_set_prop(struct power_supply *psy, | |
4622 | enum power_supply_property psp, | |
4623 | const union power_supply_propval *val) | |
4624 | { | |
4625 | struct tcpm_port *port = power_supply_get_drvdata(psy); | |
4626 | int ret; | |
4627 | ||
4628 | switch (psp) { | |
4629 | case POWER_SUPPLY_PROP_ONLINE: | |
4630 | ret = tcpm_psy_set_online(port, val); | |
4631 | break; | |
4632 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
4633 | if (val->intval < port->pps_data.min_volt * 1000 || | |
4634 | val->intval > port->pps_data.max_volt * 1000) | |
4635 | ret = -EINVAL; | |
4636 | else | |
4637 | ret = tcpm_pps_set_out_volt(port, val->intval / 1000); | |
4638 | break; | |
4639 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
4640 | if (val->intval > port->pps_data.max_curr * 1000) | |
4641 | ret = -EINVAL; | |
4642 | else | |
4643 | ret = tcpm_pps_set_op_curr(port, val->intval / 1000); | |
4644 | break; | |
4645 | default: | |
4646 | ret = -EINVAL; | |
4647 | break; | |
4648 | } | |
4649 | ||
4650 | return ret; | |
4651 | } | |
4652 | ||
4653 | static int tcpm_psy_prop_writeable(struct power_supply *psy, | |
4654 | enum power_supply_property psp) | |
4655 | { | |
4656 | switch (psp) { | |
4657 | case POWER_SUPPLY_PROP_ONLINE: | |
4658 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
4659 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
4660 | return 1; | |
4661 | default: | |
4662 | return 0; | |
4663 | } | |
4664 | } | |
4665 | ||
4666 | static enum power_supply_usb_type tcpm_psy_usb_types[] = { | |
4667 | POWER_SUPPLY_USB_TYPE_C, | |
4668 | POWER_SUPPLY_USB_TYPE_PD, | |
4669 | POWER_SUPPLY_USB_TYPE_PD_PPS, | |
4670 | }; | |
4671 | ||
4672 | static const char *tcpm_psy_name_prefix = "tcpm-source-psy-"; | |
4673 | ||
4674 | static int devm_tcpm_psy_register(struct tcpm_port *port) | |
4675 | { | |
4676 | struct power_supply_config psy_cfg = {}; | |
4677 | const char *port_dev_name = dev_name(port->dev); | |
4678 | size_t psy_name_len = strlen(tcpm_psy_name_prefix) + | |
4679 | strlen(port_dev_name) + 1; | |
4680 | char *psy_name; | |
4681 | ||
4682 | psy_cfg.drv_data = port; | |
c97a8cc1 | 4683 | psy_cfg.fwnode = dev_fwnode(port->dev); |
f2a8aa05 AT |
4684 | psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL); |
4685 | if (!psy_name) | |
4686 | return -ENOMEM; | |
4687 | ||
4688 | snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix, | |
4689 | port_dev_name); | |
4690 | port->psy_desc.name = psy_name; | |
4691 | port->psy_desc.type = POWER_SUPPLY_TYPE_USB, | |
4692 | port->psy_desc.usb_types = tcpm_psy_usb_types; | |
4693 | port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types); | |
4694 | port->psy_desc.properties = tcpm_psy_props, | |
4695 | port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props), | |
4696 | port->psy_desc.get_property = tcpm_psy_get_prop, | |
4697 | port->psy_desc.set_property = tcpm_psy_set_prop, | |
4698 | port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable, | |
4699 | ||
4700 | port->usb_type = POWER_SUPPLY_USB_TYPE_C; | |
4701 | ||
4702 | port->psy = devm_power_supply_register(port->dev, &port->psy_desc, | |
4703 | &psy_cfg); | |
4704 | ||
4705 | return PTR_ERR_OR_ZERO(port->psy); | |
4706 | } | |
4707 | ||
96232cbc LJ |
4708 | static int tcpm_copy_caps(struct tcpm_port *port, |
4709 | const struct tcpc_config *tcfg) | |
4710 | { | |
4711 | if (tcpm_validate_caps(port, tcfg->src_pdo, tcfg->nr_src_pdo) || | |
4712 | tcpm_validate_caps(port, tcfg->snk_pdo, tcfg->nr_snk_pdo)) | |
4713 | return -EINVAL; | |
4714 | ||
4715 | port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcfg->src_pdo, | |
4716 | tcfg->nr_src_pdo); | |
4717 | port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcfg->snk_pdo, | |
4718 | tcfg->nr_snk_pdo); | |
4719 | ||
4720 | port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcfg->snk_vdo, | |
4721 | tcfg->nr_snk_vdo); | |
4722 | ||
4723 | port->operating_snk_mw = tcfg->operating_snk_mw; | |
4724 | ||
4725 | port->typec_caps.prefer_role = tcfg->default_role; | |
4726 | port->typec_caps.type = tcfg->type; | |
4727 | port->typec_caps.data = tcfg->data; | |
1957de95 | 4728 | port->self_powered = tcfg->self_powered; |
96232cbc LJ |
4729 | |
4730 | return 0; | |
4731 | } | |
4732 | ||
f0690a25 GR |
4733 | struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc) |
4734 | { | |
4735 | struct tcpm_port *port; | |
4736 | int i, err; | |
4737 | ||
96232cbc | 4738 | if (!dev || !tcpc || |
f0690a25 GR |
4739 | !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc || |
4740 | !tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus || | |
4741 | !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit) | |
4742 | return ERR_PTR(-EINVAL); | |
4743 | ||
4744 | port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL); | |
4745 | if (!port) | |
4746 | return ERR_PTR(-ENOMEM); | |
4747 | ||
4748 | port->dev = dev; | |
4749 | port->tcpc = tcpc; | |
4750 | ||
4751 | mutex_init(&port->lock); | |
4752 | mutex_init(&port->swap_lock); | |
4753 | ||
4754 | port->wq = create_singlethread_workqueue(dev_name(dev)); | |
4755 | if (!port->wq) | |
4756 | return ERR_PTR(-ENOMEM); | |
4757 | INIT_DELAYED_WORK(&port->state_machine, tcpm_state_machine_work); | |
4758 | INIT_DELAYED_WORK(&port->vdm_state_machine, vdm_state_machine_work); | |
4759 | INIT_WORK(&port->event_work, tcpm_pd_event_handler); | |
4760 | ||
4761 | spin_lock_init(&port->pd_event_lock); | |
4762 | ||
4763 | init_completion(&port->tx_complete); | |
4764 | init_completion(&port->swap_complete); | |
2eadc33f | 4765 | init_completion(&port->pps_complete); |
5007e1b5 | 4766 | tcpm_debugfs_init(port); |
f0690a25 | 4767 | |
96232cbc LJ |
4768 | err = tcpm_fw_get_caps(port, tcpc->fwnode); |
4769 | if ((err < 0) && tcpc->config) | |
4770 | err = tcpm_copy_caps(port, tcpc->config); | |
4771 | if (err < 0) | |
5007e1b5 | 4772 | goto out_destroy_wq; |
96232cbc LJ |
4773 | |
4774 | if (!tcpc->config || !tcpc->config->try_role_hw) | |
4775 | port->try_role = port->typec_caps.prefer_role; | |
f0690a25 GR |
4776 | else |
4777 | port->try_role = TYPEC_NO_PREFERRED_ROLE; | |
4778 | ||
5e85a04c | 4779 | port->typec_caps.fwnode = tcpc->fwnode; |
f0690a25 | 4780 | port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */ |
2eadc33f | 4781 | port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */ |
f0690a25 GR |
4782 | port->typec_caps.dr_set = tcpm_dr_set; |
4783 | port->typec_caps.pr_set = tcpm_pr_set; | |
4784 | port->typec_caps.vconn_set = tcpm_vconn_set; | |
4785 | port->typec_caps.try_role = tcpm_try_role; | |
9b0ae699 | 4786 | port->typec_caps.port_type_set = tcpm_port_type_set; |
f0690a25 GR |
4787 | |
4788 | port->partner_desc.identity = &port->partner_ident; | |
96232cbc | 4789 | port->port_type = port->typec_caps.type; |
f0690a25 | 4790 | |
2000016c HG |
4791 | port->role_sw = usb_role_switch_get(port->dev); |
4792 | if (IS_ERR(port->role_sw)) { | |
4793 | err = PTR_ERR(port->role_sw); | |
4794 | goto out_destroy_wq; | |
4795 | } | |
4796 | ||
f2a8aa05 AT |
4797 | err = devm_tcpm_psy_register(port); |
4798 | if (err) | |
9997ab35 | 4799 | goto out_role_sw_put; |
f2a8aa05 | 4800 | |
f0690a25 | 4801 | port->typec_port = typec_register_port(port->dev, &port->typec_caps); |
cf6e06cd HK |
4802 | if (IS_ERR(port->typec_port)) { |
4803 | err = PTR_ERR(port->typec_port); | |
9997ab35 | 4804 | goto out_role_sw_put; |
f0690a25 GR |
4805 | } |
4806 | ||
96232cbc | 4807 | if (tcpc->config && tcpc->config->alt_modes) { |
3c41dbde | 4808 | const struct typec_altmode_desc *paltmode = tcpc->config->alt_modes; |
f0690a25 GR |
4809 | |
4810 | i = 0; | |
4811 | while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) { | |
cf6e06cd HK |
4812 | struct typec_altmode *alt; |
4813 | ||
4814 | alt = typec_port_register_altmode(port->typec_port, | |
4815 | paltmode); | |
4816 | if (IS_ERR(alt)) { | |
f0690a25 GR |
4817 | tcpm_log(port, |
4818 | "%s: failed to register port alternate mode 0x%x", | |
4819 | dev_name(dev), paltmode->svid); | |
4820 | break; | |
4821 | } | |
e9576fe8 HK |
4822 | typec_altmode_set_drvdata(alt, port); |
4823 | alt->ops = &tcpm_altmode_ops; | |
cf6e06cd | 4824 | port->port_altmode[i] = alt; |
f0690a25 GR |
4825 | i++; |
4826 | paltmode++; | |
4827 | } | |
4828 | } | |
4829 | ||
f0690a25 GR |
4830 | mutex_lock(&port->lock); |
4831 | tcpm_init(port); | |
4832 | mutex_unlock(&port->lock); | |
4833 | ||
4834 | tcpm_log(port, "%s: registered", dev_name(dev)); | |
4835 | return port; | |
4836 | ||
9997ab35 | 4837 | out_role_sw_put: |
2000016c | 4838 | usb_role_switch_put(port->role_sw); |
9997ab35 JL |
4839 | out_destroy_wq: |
4840 | tcpm_debugfs_exit(port); | |
f0690a25 GR |
4841 | destroy_workqueue(port->wq); |
4842 | return ERR_PTR(err); | |
4843 | } | |
4844 | EXPORT_SYMBOL_GPL(tcpm_register_port); | |
4845 | ||
4846 | void tcpm_unregister_port(struct tcpm_port *port) | |
4847 | { | |
4848 | int i; | |
4849 | ||
a6d5d230 | 4850 | tcpm_reset_port(port); |
f0690a25 GR |
4851 | for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++) |
4852 | typec_unregister_altmode(port->port_altmode[i]); | |
4853 | typec_unregister_port(port->typec_port); | |
5671a460 | 4854 | usb_role_switch_put(port->role_sw); |
f0690a25 GR |
4855 | tcpm_debugfs_exit(port); |
4856 | destroy_workqueue(port->wq); | |
4857 | } | |
4858 | EXPORT_SYMBOL_GPL(tcpm_unregister_port); | |
4859 | ||
4860 | MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>"); | |
4861 | MODULE_DESCRIPTION("USB Type-C Port Manager"); | |
4862 | MODULE_LICENSE("GPL"); |