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usb: typec: Improve Alt Mode documentation
[linux-block.git] / drivers / usb / typec / tcpm / tcpm.c
CommitLineData
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), \
34 S(DRP_TOGGLING), \
35 S(SRC_UNATTACHED), \
36 S(SRC_ATTACH_WAIT), \
37 S(SRC_ATTACHED), \
38 S(SRC_STARTUP), \
39 S(SRC_SEND_CAPABILITIES), \
40 S(SRC_NEGOTIATE_CAPABILITIES), \
41 S(SRC_TRANSITION_SUPPLY), \
42 S(SRC_READY), \
43 S(SRC_WAIT_NEW_CAPABILITIES), \
44 \
45 S(SNK_UNATTACHED), \
46 S(SNK_ATTACH_WAIT), \
47 S(SNK_DEBOUNCED), \
48 S(SNK_ATTACHED), \
49 S(SNK_STARTUP), \
50 S(SNK_DISCOVERY), \
51 S(SNK_DISCOVERY_DEBOUNCE), \
52 S(SNK_DISCOVERY_DEBOUNCE_DONE), \
53 S(SNK_WAIT_CAPABILITIES), \
54 S(SNK_NEGOTIATE_CAPABILITIES), \
2eadc33f 55 S(SNK_NEGOTIATE_PPS_CAPABILITIES), \
f0690a25
GR		 56 S(SNK_TRANSITION_SINK), \
57 S(SNK_TRANSITION_SINK_VBUS), \
58 S(SNK_READY), \
59 \
60 S(ACC_UNATTACHED), \
61 S(DEBUG_ACC_ATTACHED), \
62 S(AUDIO_ACC_ATTACHED), \
63 S(AUDIO_ACC_DEBOUNCE), \
64 \
65 S(HARD_RESET_SEND), \
66 S(HARD_RESET_START), \
67 S(SRC_HARD_RESET_VBUS_OFF), \
68 S(SRC_HARD_RESET_VBUS_ON), \
69 S(SNK_HARD_RESET_SINK_OFF), \
70 S(SNK_HARD_RESET_WAIT_VBUS), \
71 S(SNK_HARD_RESET_SINK_ON), \
72 \
73 S(SOFT_RESET), \
74 S(SOFT_RESET_SEND), \
75 \
76 S(DR_SWAP_ACCEPT), \
77 S(DR_SWAP_SEND), \
78 S(DR_SWAP_SEND_TIMEOUT), \
79 S(DR_SWAP_CANCEL), \
80 S(DR_SWAP_CHANGE_DR), \
81 \
82 S(PR_SWAP_ACCEPT), \
83 S(PR_SWAP_SEND), \
84 S(PR_SWAP_SEND_TIMEOUT), \
85 S(PR_SWAP_CANCEL), \
86 S(PR_SWAP_START), \
87 S(PR_SWAP_SRC_SNK_TRANSITION_OFF), \
88 S(PR_SWAP_SRC_SNK_SOURCE_OFF), \
b965b631 89 S(PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED), \
f0690a25
GR		 90 S(PR_SWAP_SRC_SNK_SINK_ON), \
91 S(PR_SWAP_SNK_SRC_SINK_OFF), \
92 S(PR_SWAP_SNK_SRC_SOURCE_ON), \
b965b631 93 S(PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP), \
f0690a25
GR		 94 \
95 S(VCONN_SWAP_ACCEPT), \
96 S(VCONN_SWAP_SEND), \
97 S(VCONN_SWAP_SEND_TIMEOUT), \
98 S(VCONN_SWAP_CANCEL), \
99 S(VCONN_SWAP_START), \
100 S(VCONN_SWAP_WAIT_FOR_VCONN), \
101 S(VCONN_SWAP_TURN_ON_VCONN), \
102 S(VCONN_SWAP_TURN_OFF_VCONN), \
103 \
104 S(SNK_TRY), \
105 S(SNK_TRY_WAIT), \
a0a3e04e
BJS		 106 S(SNK_TRY_WAIT_DEBOUNCE), \
107 S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \
f0690a25 108 S(SRC_TRYWAIT), \
02d5be46 109 S(SRC_TRYWAIT_DEBOUNCE), \
f0690a25
GR		 110 S(SRC_TRYWAIT_UNATTACHED), \
111 \
112 S(SRC_TRY), \
131c7d12 113 S(SRC_TRY_WAIT), \
f0690a25
GR		 114 S(SRC_TRY_DEBOUNCE), \
115 S(SNK_TRYWAIT), \
116 S(SNK_TRYWAIT_DEBOUNCE), \
117 S(SNK_TRYWAIT_VBUS), \
118 S(BIST_RX), \
119 \
64f7c494
AT		 120 S(GET_STATUS_SEND), \
121 S(GET_STATUS_SEND_TIMEOUT), \
122 S(GET_PPS_STATUS_SEND), \
123 S(GET_PPS_STATUS_SEND_TIMEOUT), \
124 \
f0690a25 125 S(ERROR_RECOVERY), \
b17dd571
GR		 126 S(PORT_RESET), \
127 S(PORT_RESET_WAIT_OFF)
f0690a25
GR		 128
129#define GENERATE_ENUM(e) e
130#define GENERATE_STRING(s) #s
131
132enum tcpm_state {
133 FOREACH_STATE(GENERATE_ENUM)
134};
135
136static const char * const tcpm_states[] = {
137 FOREACH_STATE(GENERATE_STRING)
138};
139
140enum vdm_states {
141 VDM_STATE_ERR_BUSY = -3,
142 VDM_STATE_ERR_SEND = -2,
143 VDM_STATE_ERR_TMOUT = -1,
144 VDM_STATE_DONE = 0,
145 /* Anything >0 represents an active state */
146 VDM_STATE_READY = 1,
147 VDM_STATE_BUSY = 2,
148 VDM_STATE_WAIT_RSP_BUSY = 3,
149};
150
151enum pd_msg_request {
152 PD_MSG_NONE = 0,
153 PD_MSG_CTRL_REJECT,
154 PD_MSG_CTRL_WAIT,
64f7c494 155 PD_MSG_CTRL_NOT_SUPP,
f0690a25
GR		 156 PD_MSG_DATA_SINK_CAP,
157 PD_MSG_DATA_SOURCE_CAP,
158};
159
160/* Events from low level driver */
161
162#define TCPM_CC_EVENT BIT(0)
163#define TCPM_VBUS_EVENT BIT(1)
164#define TCPM_RESET_EVENT BIT(2)
165
166#define LOG_BUFFER_ENTRIES 1024
167#define LOG_BUFFER_ENTRY_SIZE 128
168
169/* Alternate mode support */
170
171#define SVID_DISCOVERY_MAX 16
e9576fe8 172#define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX)
f0690a25
GR		 173
174struct pd_mode_data {
175 int svid_index; /* current SVID index */
176 int nsvids;
177 u16 svids[SVID_DISCOVERY_MAX];
178 int altmodes; /* number of alternate modes */
e9576fe8 179 struct typec_altmode_desc altmode_desc[ALTMODE_DISCOVERY_MAX];
f0690a25
GR		 180};
181
2eadc33f
AT		 182struct pd_pps_data {
183 u32 min_volt;
184 u32 max_volt;
185 u32 max_curr;
186 u32 out_volt;
187 u32 op_curr;
188 bool supported;
189 bool active;
190};
191
f0690a25
GR		 192struct tcpm_port {
193 struct device *dev;
194
195 struct mutex lock; /* tcpm state machine lock */
196 struct workqueue_struct *wq;
197
198 struct typec_capability typec_caps;
199 struct typec_port *typec_port;
200
201 struct tcpc_dev *tcpc;
2000016c 202 struct usb_role_switch *role_sw;
f0690a25
GR		 203
204 enum typec_role vconn_role;
205 enum typec_role pwr_role;
206 enum typec_data_role data_role;
207 enum typec_pwr_opmode pwr_opmode;
208
209 struct usb_pd_identity partner_ident;
210 struct typec_partner_desc partner_desc;
211 struct typec_partner *partner;
212
213 enum typec_cc_status cc_req;
214
215 enum typec_cc_status cc1;
216 enum typec_cc_status cc2;
217 enum typec_cc_polarity polarity;
218
219 bool attached;
220 bool connected;
9b0ae699 221 enum typec_port_type port_type;
f0690a25
GR		 222 bool vbus_present;
223 bool vbus_never_low;
224 bool vbus_source;
225 bool vbus_charge;
226
227 bool send_discover;
228 bool op_vsafe5v;
229
230 int try_role;
231 int try_snk_count;
232 int try_src_count;
233
234 enum pd_msg_request queued_message;
235
236 enum tcpm_state enter_state;
237 enum tcpm_state prev_state;
238 enum tcpm_state state;
239 enum tcpm_state delayed_state;
240 unsigned long delayed_runtime;
241 unsigned long delay_ms;
242
243 spinlock_t pd_event_lock;
244 u32 pd_events;
245
246 struct work_struct event_work;
247 struct delayed_work state_machine;
248 struct delayed_work vdm_state_machine;
249 bool state_machine_running;
250
251 struct completion tx_complete;
252 enum tcpm_transmit_status tx_status;
253
254 struct mutex swap_lock; /* swap command lock */
255 bool swap_pending;
b17dd571 256 bool non_pd_role_swap;
f0690a25
GR		 257 struct completion swap_complete;
258 int swap_status;
259
2eadc33f 260 unsigned int negotiated_rev;
f0690a25
GR		 261 unsigned int message_id;
262 unsigned int caps_count;
263 unsigned int hard_reset_count;
264 bool pd_capable;
265 bool explicit_contract;
5fec4b54 266 unsigned int rx_msgid;
f0690a25
GR		 267
268 /* Partner capabilities/requests */
269 u32 sink_request;
270 u32 source_caps[PDO_MAX_OBJECTS];
271 unsigned int nr_source_caps;
272 u32 sink_caps[PDO_MAX_OBJECTS];
273 unsigned int nr_sink_caps;
274
275 /* Local capabilities */
276 u32 src_pdo[PDO_MAX_OBJECTS];
277 unsigned int nr_src_pdo;
278 u32 snk_pdo[PDO_MAX_OBJECTS];
279 unsigned int nr_snk_pdo;
193a6801
GR		 280 u32 snk_vdo[VDO_MAX_OBJECTS];
281 unsigned int nr_snk_vdo;
f0690a25 282
f0690a25 283 unsigned int operating_snk_mw;
2eadc33f 284 bool update_sink_caps;
f0690a25
GR		 285
286 /* Requested current / voltage */
287 u32 current_limit;
288 u32 supply_voltage;
289
f2a8aa05
AT		 290 /* Used to export TA voltage and current */
291 struct power_supply *psy;
292 struct power_supply_desc psy_desc;
293 enum power_supply_usb_type usb_type;
294
f0690a25
GR		 295 u32 bist_request;
296
297 /* PD state for Vendor Defined Messages */
298 enum vdm_states vdm_state;
299 u32 vdm_retries;
300 /* next Vendor Defined Message to send */
301 u32 vdo_data[VDO_MAX_SIZE];
302 u8 vdo_count;
303 /* VDO to retry if UFP responder replied busy */
304 u32 vdo_retry;
305
2eadc33f
AT		 306 /* PPS */
307 struct pd_pps_data pps_data;
308 struct completion pps_complete;
309 bool pps_pending;
310 int pps_status;
f0690a25 311
2eadc33f 312 /* Alternate mode data */
f0690a25 313 struct pd_mode_data mode_data;
e9576fe8
HK		 314 struct typec_altmode *partner_altmode[ALTMODE_DISCOVERY_MAX];
315 struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX];
f0690a25 316
02d5be46
BJS		 317 /* Deadline in jiffies to exit src_try_wait state */
318 unsigned long max_wait;
319
23b5f732
BJS		 320 /* port belongs to a self powered device */
321 bool self_powered;
322
f0690a25
GR		 323#ifdef CONFIG_DEBUG_FS
324 struct dentry *dentry;
325 struct mutex logbuffer_lock; /* log buffer access lock */
326 int logbuffer_head;
327 int logbuffer_tail;
328 u8 *logbuffer[LOG_BUFFER_ENTRIES];
329#endif
330};
331
332struct pd_rx_event {
333 struct work_struct work;
334 struct tcpm_port *port;
335 struct pd_message msg;
336};
337
338#define tcpm_cc_is_sink(cc) \
339 ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \
340 (cc) == TYPEC_CC_RP_3_0)
341
342#define tcpm_port_is_sink(port) \
343 ((tcpm_cc_is_sink((port)->cc1) && !tcpm_cc_is_sink((port)->cc2)) || \
344 (tcpm_cc_is_sink((port)->cc2) && !tcpm_cc_is_sink((port)->cc1)))
345
346#define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD)
347#define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA)
348#define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN)
349
350#define tcpm_port_is_source(port) \
351 ((tcpm_cc_is_source((port)->cc1) && \
352 !tcpm_cc_is_source((port)->cc2)) || \
353 (tcpm_cc_is_source((port)->cc2) && \
354 !tcpm_cc_is_source((port)->cc1)))
355
356#define tcpm_port_is_debug(port) \
357 (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2))
358
359#define tcpm_port_is_audio(port) \
360 (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2))
361
362#define tcpm_port_is_audio_detached(port) \
363 ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \
364 (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1)))
365
366#define tcpm_try_snk(port) \
ff6c8cb1
BJS		 367 ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \
368 (port)->port_type == TYPEC_PORT_DRP)
f0690a25
GR		 369
370#define tcpm_try_src(port) \
ff6c8cb1
BJS		 371 ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \
372 (port)->port_type == TYPEC_PORT_DRP)
f0690a25
GR		 373
374static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
375{
9b0ae699 376 if (port->port_type == TYPEC_PORT_DRP) {
b46a9c90
BJS		 377 if (port->try_role == TYPEC_SINK)
378 return SNK_UNATTACHED;
379 else if (port->try_role == TYPEC_SOURCE)
380 return SRC_UNATTACHED;
381 else if (port->tcpc->config->default_role == TYPEC_SINK)
382 return SNK_UNATTACHED;
383 /* Fall through to return SRC_UNATTACHED */
ceeb1625 384 } else if (port->port_type == TYPEC_PORT_SNK) {
f0690a25 385 return SNK_UNATTACHED;
b46a9c90 386 }
f0690a25
GR		 387 return SRC_UNATTACHED;
388}
389
390static inline
391struct tcpm_port *typec_cap_to_tcpm(const struct typec_capability *cap)
392{
393 return container_of(cap, struct tcpm_port, typec_caps);
394}
395
396static bool tcpm_port_is_disconnected(struct tcpm_port *port)
397{
398 return (!port->attached && port->cc1 == TYPEC_CC_OPEN &&
399 port->cc2 == TYPEC_CC_OPEN) ||
400 (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 &&
401 port->cc1 == TYPEC_CC_OPEN) ||
402 (port->polarity == TYPEC_POLARITY_CC2 &&
403 port->cc2 == TYPEC_CC_OPEN)));
404}
405
406/*
407 * Logging
408 */
409
410#ifdef CONFIG_DEBUG_FS
411
412static bool tcpm_log_full(struct tcpm_port *port)
413{
414 return port->logbuffer_tail ==
415 (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
416}
417
e79e0125 418__printf(2, 0)
f0690a25
GR		 419static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args)
420{
421 char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
422 u64 ts_nsec = local_clock();
423 unsigned long rem_nsec;
424
d5a4f935 425 mutex_lock(&port->logbuffer_lock);
f0690a25
GR		 426 if (!port->logbuffer[port->logbuffer_head]) {
427 port->logbuffer[port->logbuffer_head] =
428 kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
d5a4f935
PC		 429 if (!port->logbuffer[port->logbuffer_head]) {
430 mutex_unlock(&port->logbuffer_lock);
f0690a25 431 return;
d5a4f935 432 }
f0690a25
GR		 433 }
434
435 vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
436
f0690a25
GR		 437 if (tcpm_log_full(port)) {
438 port->logbuffer_head = max(port->logbuffer_head - 1, 0);
439 strcpy(tmpbuffer, "overflow");
440 }
441
442 if (port->logbuffer_head < 0 ||
443 port->logbuffer_head >= LOG_BUFFER_ENTRIES) {
444 dev_warn(port->dev,
445 "Bad log buffer index %d\n", port->logbuffer_head);
446 goto abort;
447 }
448
449 if (!port->logbuffer[port->logbuffer_head]) {
450 dev_warn(port->dev,
451 "Log buffer index %d is NULL\n", port->logbuffer_head);
452 goto abort;
453 }
454
455 rem_nsec = do_div(ts_nsec, 1000000000);
456 scnprintf(port->logbuffer[port->logbuffer_head],
457 LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
458 (unsigned long)ts_nsec, rem_nsec / 1000,
459 tmpbuffer);
460 port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
461
462abort:
463 mutex_unlock(&port->logbuffer_lock);
464}
465
e79e0125 466__printf(2, 3)
f0690a25
GR		 467static void tcpm_log(struct tcpm_port *port, const char *fmt, ...)
468{
469 va_list args;
470
471 /* Do not log while disconnected and unattached */
472 if (tcpm_port_is_disconnected(port) &&
473 (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED ||
474 port->state == DRP_TOGGLING))
475 return;
476
477 va_start(args, fmt);
478 _tcpm_log(port, fmt, args);
479 va_end(args);
480}
481
e79e0125 482__printf(2, 3)
f0690a25
GR		 483static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...)
484{
485 va_list args;
486
487 va_start(args, fmt);
488 _tcpm_log(port, fmt, args);
489 va_end(args);
490}
491
492static void tcpm_log_source_caps(struct tcpm_port *port)
493{
494 int i;
495
496 for (i = 0; i < port->nr_source_caps; i++) {
497 u32 pdo = port->source_caps[i];
498 enum pd_pdo_type type = pdo_type(pdo);
499 char msg[64];
500
501 switch (type) {
502 case PDO_TYPE_FIXED:
503 scnprintf(msg, sizeof(msg),
504 "%u mV, %u mA [%s%s%s%s%s%s]",
505 pdo_fixed_voltage(pdo),
506 pdo_max_current(pdo),
507 (pdo & PDO_FIXED_DUAL_ROLE) ?
508 "R" : "",
509 (pdo & PDO_FIXED_SUSPEND) ?
510 "S" : "",
511 (pdo & PDO_FIXED_HIGHER_CAP) ?
512 "H" : "",
513 (pdo & PDO_FIXED_USB_COMM) ?
514 "U" : "",
515 (pdo & PDO_FIXED_DATA_SWAP) ?
516 "D" : "",
517 (pdo & PDO_FIXED_EXTPOWER) ?
518 "E" : "");
519 break;
520 case PDO_TYPE_VAR:
521 scnprintf(msg, sizeof(msg),
522 "%u-%u mV, %u mA",
523 pdo_min_voltage(pdo),
524 pdo_max_voltage(pdo),
525 pdo_max_current(pdo));
526 break;
527 case PDO_TYPE_BATT:
528 scnprintf(msg, sizeof(msg),
529 "%u-%u mV, %u mW",
530 pdo_min_voltage(pdo),
531 pdo_max_voltage(pdo),
532 pdo_max_power(pdo));
533 break;
2eadc33f
AT		 534 case PDO_TYPE_APDO:
535 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS)
536 scnprintf(msg, sizeof(msg),
537 "%u-%u mV, %u mA",
538 pdo_pps_apdo_min_voltage(pdo),
539 pdo_pps_apdo_max_voltage(pdo),
540 pdo_pps_apdo_max_current(pdo));
541 else
542 strcpy(msg, "undefined APDO");
543 break;
f0690a25
GR		 544 default:
545 strcpy(msg, "undefined");
546 break;
547 }
548 tcpm_log(port, " PDO %d: type %d, %s",
549 i, type, msg);
550 }
551}
552
9e902c59 553static int tcpm_debug_show(struct seq_file *s, void *v)
f0690a25
GR		 554{
555 struct tcpm_port *port = (struct tcpm_port *)s->private;
556 int tail;
557
558 mutex_lock(&port->logbuffer_lock);
559 tail = port->logbuffer_tail;
560 while (tail != port->logbuffer_head) {
561 seq_printf(s, "%s\n", port->logbuffer[tail]);
562 tail = (tail + 1) % LOG_BUFFER_ENTRIES;
563 }
564 if (!seq_has_overflowed(s))
565 port->logbuffer_tail = tail;
566 mutex_unlock(&port->logbuffer_lock);
567
568 return 0;
569}
9e902c59 570DEFINE_SHOW_ATTRIBUTE(tcpm_debug);
f0690a25
GR		 571
572static struct dentry *rootdir;
573
a941fc39 574static void tcpm_debugfs_init(struct tcpm_port *port)
f0690a25
GR		 575{
576 mutex_init(&port->logbuffer_lock);
577 /* /sys/kernel/debug/tcpm/usbcX */
a941fc39 578 if (!rootdir)
f0690a25 579 rootdir = debugfs_create_dir("tcpm", NULL);
f0690a25
GR		 580
581 port->dentry = debugfs_create_file(dev_name(port->dev),
582 S_IFREG | 0444, rootdir,
9e902c59 583 port, &tcpm_debug_fops);
f0690a25
GR		 584}
585
586static void tcpm_debugfs_exit(struct tcpm_port *port)
587{
588 debugfs_remove(port->dentry);
589}
590
591#else
592
e79e0125 593__printf(2, 3)
f0690a25 594static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { }
e79e0125 595__printf(2, 3)
f0690a25
GR		 596static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { }
597static void tcpm_log_source_caps(struct tcpm_port *port) { }
a941fc39 598static void tcpm_debugfs_init(const struct tcpm_port *port) { }
f0690a25
GR		 599static void tcpm_debugfs_exit(const struct tcpm_port *port) { }
600
601#endif
602
603static int tcpm_pd_transmit(struct tcpm_port *port,
604 enum tcpm_transmit_type type,
605 const struct pd_message *msg)
606{
607 unsigned long timeout;
608 int ret;
609
610 if (msg)
611 tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header));
612 else
613 tcpm_log(port, "PD TX, type: %#x", type);
614
615 reinit_completion(&port->tx_complete);
616 ret = port->tcpc->pd_transmit(port->tcpc, type, msg);
617 if (ret < 0)
618 return ret;
619
620 mutex_unlock(&port->lock);
621 timeout = wait_for_completion_timeout(&port->tx_complete,
622 msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT));
623 mutex_lock(&port->lock);
624 if (!timeout)
625 return -ETIMEDOUT;
626
627 switch (port->tx_status) {
628 case TCPC_TX_SUCCESS:
629 port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK;
630 return 0;
631 case TCPC_TX_DISCARDED:
632 return -EAGAIN;
633 case TCPC_TX_FAILED:
634 default:
635 return -EIO;
636 }
637}
638
639void tcpm_pd_transmit_complete(struct tcpm_port *port,
640 enum tcpm_transmit_status status)
641{
642 tcpm_log(port, "PD TX complete, status: %u", status);
643 port->tx_status = status;
644 complete(&port->tx_complete);
645}
646EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete);
647
e9576fe8 648static int tcpm_mux_set(struct tcpm_port *port, int state,
2000016c
HG		 649 enum usb_role usb_role,
650 enum typec_orientation orientation)
f0690a25 651{
2000016c 652 int ret;
f0690a25 653
e9576fe8
HK		 654 tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d",
655 state, usb_role, orientation);
f0690a25 656
2000016c
HG		 657 ret = typec_set_orientation(port->typec_port, orientation);
658 if (ret)
659 return ret;
f0690a25 660
2000016c
HG		 661 if (port->role_sw) {
662 ret = usb_role_switch_set_role(port->role_sw, usb_role);
663 if (ret)
664 return ret;
665 }
666
e9576fe8 667 return typec_set_mode(port->typec_port, state);
f0690a25
GR		 668}
669
670static int tcpm_set_polarity(struct tcpm_port *port,
671 enum typec_cc_polarity polarity)
672{
673 int ret;
674
675 tcpm_log(port, "polarity %d", polarity);
676
677 ret = port->tcpc->set_polarity(port->tcpc, polarity);
678 if (ret < 0)
679 return ret;
680
681 port->polarity = polarity;
682
683 return 0;
684}
685
686static int tcpm_set_vconn(struct tcpm_port *port, bool enable)
687{
688 int ret;
689
690 tcpm_log(port, "vconn:=%d", enable);
691
692 ret = port->tcpc->set_vconn(port->tcpc, enable);
693 if (!ret) {
694 port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK;
695 typec_set_vconn_role(port->typec_port, port->vconn_role);
696 }
697
698 return ret;
699}
700
701static u32 tcpm_get_current_limit(struct tcpm_port *port)
702{
703 enum typec_cc_status cc;
704 u32 limit;
705
706 cc = port->polarity ? port->cc2 : port->cc1;
707 switch (cc) {
708 case TYPEC_CC_RP_1_5:
709 limit = 1500;
710 break;
711 case TYPEC_CC_RP_3_0:
712 limit = 3000;
713 break;
714 case TYPEC_CC_RP_DEF:
715 default:
ea62cfc7
HG		 716 if (port->tcpc->get_current_limit)
717 limit = port->tcpc->get_current_limit(port->tcpc);
718 else
719 limit = 0;
f0690a25
GR		 720 break;
721 }
722
723 return limit;
724}
725
726static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv)
727{
728 int ret = -EOPNOTSUPP;
729
730 tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma);
731
146971e6
HG		 732 port->supply_voltage = mv;
733 port->current_limit = max_ma;
734
f0690a25
GR		 735 if (port->tcpc->set_current_limit)
736 ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv);
737
738 return ret;
739}
740
741/*
742 * Determine RP value to set based on maximum current supported
743 * by a port if configured as source.
744 * Returns CC value to report to link partner.
745 */
746static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port)
747{
748 const u32 *src_pdo = port->src_pdo;
749 int nr_pdo = port->nr_src_pdo;
750 int i;
751
752 /*
753 * Search for first entry with matching voltage.
754 * It should report the maximum supported current.
755 */
756 for (i = 0; i < nr_pdo; i++) {
757 const u32 pdo = src_pdo[i];
758
759 if (pdo_type(pdo) == PDO_TYPE_FIXED &&
760 pdo_fixed_voltage(pdo) == 5000) {
761 unsigned int curr = pdo_max_current(pdo);
762
763 if (curr >= 3000)
764 return TYPEC_CC_RP_3_0;
765 else if (curr >= 1500)
766 return TYPEC_CC_RP_1_5;
767 return TYPEC_CC_RP_DEF;
768 }
769 }
770
771 return TYPEC_CC_RP_DEF;
772}
773
774static int tcpm_set_attached_state(struct tcpm_port *port, bool attached)
775{
776 return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role,
777 port->data_role);
778}
779
780static int tcpm_set_roles(struct tcpm_port *port, bool attached,
781 enum typec_role role, enum typec_data_role data)
782{
2000016c 783 enum typec_orientation orientation;
c6962c29 784 enum usb_role usb_role;
f0690a25
GR		 785 int ret;
786
2000016c
HG		 787 if (port->polarity == TYPEC_POLARITY_CC1)
788 orientation = TYPEC_ORIENTATION_NORMAL;
789 else
790 orientation = TYPEC_ORIENTATION_REVERSE;
791
f0690a25 792 if (data == TYPEC_HOST)
c6962c29 793 usb_role = USB_ROLE_HOST;
f0690a25 794 else
c6962c29
HG		 795 usb_role = USB_ROLE_DEVICE;
796
e9576fe8 797 ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation);
f0690a25
GR		 798 if (ret < 0)
799 return ret;
800
801 ret = port->tcpc->set_roles(port->tcpc, attached, role, data);
802 if (ret < 0)
803 return ret;
804
805 port->pwr_role = role;
806 port->data_role = data;
807 typec_set_data_role(port->typec_port, data);
808 typec_set_pwr_role(port->typec_port, role);
809
810 return 0;
811}
812
813static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role)
814{
815 int ret;
816
817 ret = port->tcpc->set_roles(port->tcpc, true, role,
818 port->data_role);
819 if (ret < 0)
820 return ret;
821
822 port->pwr_role = role;
823 typec_set_pwr_role(port->typec_port, role);
824
825 return 0;
826}
827
828static int tcpm_pd_send_source_caps(struct tcpm_port *port)
829{
830 struct pd_message msg;
831 int i;
832
833 memset(&msg, 0, sizeof(msg));
834 if (!port->nr_src_pdo) {
835 /* No source capabilities defined, sink only */
836 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
837 port->pwr_role,
838 port->data_role,
2eadc33f 839 port->negotiated_rev,
f0690a25
GR		 840 port->message_id, 0);
841 } else {
842 msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP,
843 port->pwr_role,
844 port->data_role,
2eadc33f 845 port->negotiated_rev,
f0690a25
GR		 846 port->message_id,
847 port->nr_src_pdo);
848 }
849 for (i = 0; i < port->nr_src_pdo; i++)
850 msg.payload[i] = cpu_to_le32(port->src_pdo[i]);
851
852 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
853}
854
855static int tcpm_pd_send_sink_caps(struct tcpm_port *port)
856{
857 struct pd_message msg;
858 int i;
859
860 memset(&msg, 0, sizeof(msg));
861 if (!port->nr_snk_pdo) {
862 /* No sink capabilities defined, source only */
863 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
864 port->pwr_role,
865 port->data_role,
2eadc33f 866 port->negotiated_rev,
f0690a25
GR		 867 port->message_id, 0);
868 } else {
869 msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP,
870 port->pwr_role,
871 port->data_role,
2eadc33f 872 port->negotiated_rev,
f0690a25
GR		 873 port->message_id,
874 port->nr_snk_pdo);
875 }
876 for (i = 0; i < port->nr_snk_pdo; i++)
877 msg.payload[i] = cpu_to_le32(port->snk_pdo[i]);
878
879 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
880}
881
882static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state,
883 unsigned int delay_ms)
884{
885 if (delay_ms) {
886 tcpm_log(port, "pending state change %s -> %s @ %u ms",
887 tcpm_states[port->state], tcpm_states[state],
888 delay_ms);
889 port->delayed_state = state;
890 mod_delayed_work(port->wq, &port->state_machine,
891 msecs_to_jiffies(delay_ms));
892 port->delayed_runtime = jiffies + msecs_to_jiffies(delay_ms);
893 port->delay_ms = delay_ms;
894 } else {
895 tcpm_log(port, "state change %s -> %s",
896 tcpm_states[port->state], tcpm_states[state]);
897 port->delayed_state = INVALID_STATE;
898 port->prev_state = port->state;
899 port->state = state;
900 /*
901 * Don't re-queue the state machine work item if we're currently
902 * in the state machine and we're immediately changing states.
903 * tcpm_state_machine_work() will continue running the state
904 * machine.
905 */
906 if (!port->state_machine_running)
907 mod_delayed_work(port->wq, &port->state_machine, 0);
908 }
909}
910
911static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state,
912 unsigned int delay_ms)
913{
914 if (port->enter_state == port->state)
915 tcpm_set_state(port, state, delay_ms);
916 else
917 tcpm_log(port,
918 "skipped %sstate change %s -> %s [%u ms], context state %s",
919 delay_ms ? "delayed " : "",
920 tcpm_states[port->state], tcpm_states[state],
921 delay_ms, tcpm_states[port->enter_state]);
922}
923
924static void tcpm_queue_message(struct tcpm_port *port,
925 enum pd_msg_request message)
926{
927 port->queued_message = message;
928 mod_delayed_work(port->wq, &port->state_machine, 0);
929}
930
931/*
932 * VDM/VDO handling functions
933 */
934static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
935 const u32 *data, int cnt)
936{
937 port->vdo_count = cnt + 1;
938 port->vdo_data[0] = header;
939 memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt);
940 /* Set ready, vdm state machine will actually send */
941 port->vdm_retries = 0;
942 port->vdm_state = VDM_STATE_READY;
943}
944
945static void svdm_consume_identity(struct tcpm_port *port, const __le32 *payload,
946 int cnt)
947{
948 u32 vdo = le32_to_cpu(payload[VDO_INDEX_IDH]);
949 u32 product = le32_to_cpu(payload[VDO_INDEX_PRODUCT]);
950
951 memset(&port->mode_data, 0, sizeof(port->mode_data));
952
f0690a25
GR		 953 port->partner_ident.id_header = vdo;
954 port->partner_ident.cert_stat = le32_to_cpu(payload[VDO_INDEX_CSTAT]);
955 port->partner_ident.product = product;
956
957 typec_partner_set_identity(port->partner);
958
959 tcpm_log(port, "Identity: %04x:%04x.%04x",
960 PD_IDH_VID(vdo),
961 PD_PRODUCT_PID(product), product & 0xffff);
962}
963
964static bool svdm_consume_svids(struct tcpm_port *port, const __le32 *payload,
965 int cnt)
966{
967 struct pd_mode_data *pmdata = &port->mode_data;
968 int i;
969
970 for (i = 1; i < cnt; i++) {
971 u32 p = le32_to_cpu(payload[i]);
972 u16 svid;
973
974 svid = (p >> 16) & 0xffff;
975 if (!svid)
976 return false;
977
978 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
979 goto abort;
980
981 pmdata->svids[pmdata->nsvids++] = svid;
982 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
983
984 svid = p & 0xffff;
985 if (!svid)
986 return false;
987
988 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
989 goto abort;
990
991 pmdata->svids[pmdata->nsvids++] = svid;
992 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
993 }
994 return true;
995abort:
996 tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX);
997 return false;
998}
999
1000static void svdm_consume_modes(struct tcpm_port *port, const __le32 *payload,
1001 int cnt)
1002{
1003 struct pd_mode_data *pmdata = &port->mode_data;
1004 struct typec_altmode_desc *paltmode;
f0690a25
GR		 1005 int i;
1006
1007 if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) {
1008 /* Already logged in svdm_consume_svids() */
1009 return;
1010 }
1011
4ab8c18d
HK		 1012 for (i = 1; i < cnt; i++) {
1013 paltmode = &pmdata->altmode_desc[pmdata->altmodes];
1014 memset(paltmode, 0, sizeof(*paltmode));
1015
1016 paltmode->svid = pmdata->svids[pmdata->svid_index];
1017 paltmode->mode = i;
1018 paltmode->vdo = le32_to_cpu(payload[i]);
1019
1020 tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x",
1021 pmdata->altmodes, paltmode->svid,
1022 paltmode->mode, paltmode->vdo);
1023
4ab8c18d 1024 pmdata->altmodes++;
f0690a25 1025 }
f0690a25
GR		 1026}
1027
e9576fe8
HK		 1028static void tcpm_register_partner_altmodes(struct tcpm_port *port)
1029{
1030 struct pd_mode_data *modep = &port->mode_data;
1031 struct typec_altmode *altmode;
1032 int i;
1033
1034 for (i = 0; i < modep->altmodes; i++) {
1035 altmode = typec_partner_register_altmode(port->partner,
1036 &modep->altmode_desc[i]);
1037 if (!altmode)
1038 tcpm_log(port, "Failed to register partner SVID 0x%04x",
1039 modep->altmode_desc[i].svid);
1040 port->partner_altmode[i] = altmode;
1041 }
1042}
1043
f0690a25
GR		 1044#define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header)
1045
1046static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt,
1047 u32 *response)
1048{
e9576fe8
HK		 1049 struct typec_altmode *adev;
1050 struct typec_altmode *pdev;
f0690a25 1051 struct pd_mode_data *modep;
e9576fe8 1052 u32 p[PD_MAX_PAYLOAD];
f0690a25 1053 int rlen = 0;
e9576fe8
HK		 1054 int cmd_type;
1055 int cmd;
193a6801 1056 int i;
f0690a25 1057
e9576fe8
HK		 1058 for (i = 0; i < cnt; i++)
1059 p[i] = le32_to_cpu(payload[i]);
1060
1061 cmd_type = PD_VDO_CMDT(p[0]);
1062 cmd = PD_VDO_CMD(p[0]);
1063
f0690a25 1064 tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d",
e9576fe8 1065 p[0], cmd_type, cmd, cnt);
f0690a25
GR		 1066
1067 modep = &port->mode_data;
1068
e9576fe8
HK		 1069 adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX,
1070 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1071
1072 pdev = typec_match_altmode(port->partner_altmode, ALTMODE_DISCOVERY_MAX,
1073 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1074
f0690a25
GR		 1075 switch (cmd_type) {
1076 case CMDT_INIT:
1077 switch (cmd) {
1078 case CMD_DISCOVER_IDENT:
193a6801
GR		 1079 /* 6.4.4.3.1: Only respond as UFP (device) */
1080 if (port->data_role == TYPEC_DEVICE &&
1081 port->nr_snk_vdo) {
1082 for (i = 0; i < port->nr_snk_vdo; i++)
cbe5843e 1083 response[i + 1] = port->snk_vdo[i];
193a6801
GR		 1084 rlen = port->nr_snk_vdo + 1;
1085 }
f0690a25
GR		 1086 break;
1087 case CMD_DISCOVER_SVID:
1088 break;
1089 case CMD_DISCOVER_MODES:
1090 break;
1091 case CMD_ENTER_MODE:
1092 break;
1093 case CMD_EXIT_MODE:
1094 break;
1095 case CMD_ATTENTION:
e9576fe8
HK		 1096 /* Attention command does not have response */
1097 typec_altmode_attention(adev, p[1]);
1098 return 0;
f0690a25
GR		 1099 default:
1100 break;
1101 }
1102 if (rlen >= 1) {
e9576fe8 1103 response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK);
f0690a25 1104 } else if (rlen == 0) {
e9576fe8 1105 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
f0690a25
GR		 1106 rlen = 1;
1107 } else {
e9576fe8 1108 response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY);
f0690a25
GR		 1109 rlen = 1;
1110 }
1111 break;
1112 case CMDT_RSP_ACK:
1113 /* silently drop message if we are not connected */
cf6e06cd 1114 if (IS_ERR_OR_NULL(port->partner))
f0690a25
GR		 1115 break;
1116
1117 switch (cmd) {
1118 case CMD_DISCOVER_IDENT:
1119 /* 6.4.4.3.1 */
1120 svdm_consume_identity(port, payload, cnt);
1121 response[0] = VDO(USB_SID_PD, 1, CMD_DISCOVER_SVID);
1122 rlen = 1;
1123 break;
1124 case CMD_DISCOVER_SVID:
1125 /* 6.4.4.3.2 */
1126 if (svdm_consume_svids(port, payload, cnt)) {
1127 response[0] = VDO(USB_SID_PD, 1,
1128 CMD_DISCOVER_SVID);
1129 rlen = 1;
1130 } else if (modep->nsvids && supports_modal(port)) {
1131 response[0] = VDO(modep->svids[0], 1,
1132 CMD_DISCOVER_MODES);
1133 rlen = 1;
1134 }
1135 break;
1136 case CMD_DISCOVER_MODES:
1137 /* 6.4.4.3.3 */
1138 svdm_consume_modes(port, payload, cnt);
1139 modep->svid_index++;
1140 if (modep->svid_index < modep->nsvids) {
e9576fe8 1141 u16 svid = modep->svids[modep->svid_index];
f0690a25
GR		 1142 response[0] = VDO(svid, 1, CMD_DISCOVER_MODES);
1143 rlen = 1;
1144 } else {
e9576fe8 1145 tcpm_register_partner_altmodes(port);
f0690a25
GR		 1146 }
1147 break;
1148 case CMD_ENTER_MODE:
e9576fe8
HK		 1149 typec_altmode_update_active(pdev, true);
1150
1151 if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
1152 response[0] = VDO(adev->svid, 1, CMD_EXIT_MODE);
1153 response[0] |= VDO_OPOS(adev->mode);
1154 return 1;
1155 }
1156 return 0;
1157 case CMD_EXIT_MODE:
1158 typec_altmode_update_active(pdev, false);
1159
1160 /* Back to USB Operation */
1161 WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB,
1162 NULL));
1163 break;
1164 default:
1165 break;
1166 }
1167 break;
1168 case CMDT_RSP_NAK:
1169 switch (cmd) {
1170 case CMD_ENTER_MODE:
1171 /* Back to USB Operation */
1172 WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB,
1173 NULL));
f0690a25
GR		 1174 break;
1175 default:
1176 break;
1177 }
1178 break;
1179 default:
1180 break;
1181 }
1182
e9576fe8
HK		 1183 /* Informing the alternate mode drivers about everything */
1184 typec_altmode_vdm(adev, p[0], &p[1], cnt);
1185
f0690a25
GR		 1186 return rlen;
1187}
1188
1189static void tcpm_handle_vdm_request(struct tcpm_port *port,
1190 const __le32 *payload, int cnt)
1191{
1192 int rlen = 0;
1193 u32 response[8] = { };
1194 u32 p0 = le32_to_cpu(payload[0]);
1195
1196 if (port->vdm_state == VDM_STATE_BUSY) {
1197 /* If UFP responded busy retry after timeout */
1198 if (PD_VDO_CMDT(p0) == CMDT_RSP_BUSY) {
1199 port->vdm_state = VDM_STATE_WAIT_RSP_BUSY;
1200 port->vdo_retry = (p0 & ~VDO_CMDT_MASK) |
1201 CMDT_INIT;
1202 mod_delayed_work(port->wq, &port->vdm_state_machine,
1203 msecs_to_jiffies(PD_T_VDM_BUSY));
1204 return;
1205 }
1206 port->vdm_state = VDM_STATE_DONE;
1207 }
1208
1209 if (PD_VDO_SVDM(p0))
1210 rlen = tcpm_pd_svdm(port, payload, cnt, response);
f0690a25
GR		 1211
1212 if (rlen > 0) {
1213 tcpm_queue_vdm(port, response[0], &response[1], rlen - 1);
1214 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1215 }
1216}
1217
1218static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd,
1219 const u32 *data, int count)
1220{
1221 u32 header;
1222
1223 if (WARN_ON(count > VDO_MAX_SIZE - 1))
1224 count = VDO_MAX_SIZE - 1;
1225
1226 /* set VDM header with VID & CMD */
1227 header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ?
1228 1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION), cmd);
1229 tcpm_queue_vdm(port, header, data, count);
1230
1231 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1232}
1233
1234static unsigned int vdm_ready_timeout(u32 vdm_hdr)
1235{
1236 unsigned int timeout;
1237 int cmd = PD_VDO_CMD(vdm_hdr);
1238
1239 /* its not a structured VDM command */
1240 if (!PD_VDO_SVDM(vdm_hdr))
1241 return PD_T_VDM_UNSTRUCTURED;
1242
1243 switch (PD_VDO_CMDT(vdm_hdr)) {
1244 case CMDT_INIT:
1245 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1246 timeout = PD_T_VDM_WAIT_MODE_E;
1247 else
1248 timeout = PD_T_VDM_SNDR_RSP;
1249 break;
1250 default:
1251 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1252 timeout = PD_T_VDM_E_MODE;
1253 else
1254 timeout = PD_T_VDM_RCVR_RSP;
1255 break;
1256 }
1257 return timeout;
1258}
1259
1260static void vdm_run_state_machine(struct tcpm_port *port)
1261{
1262 struct pd_message msg;
1263 int i, res;
1264
1265 switch (port->vdm_state) {
1266 case VDM_STATE_READY:
1267 /* Only transmit VDM if attached */
1268 if (!port->attached) {
1269 port->vdm_state = VDM_STATE_ERR_BUSY;
1270 break;
1271 }
1272
1273 /*
1274 * if there's traffic or we're not in PDO ready state don't send
1275 * a VDM.
1276 */
1277 if (port->state != SRC_READY && port->state != SNK_READY)
1278 break;
1279
1280 /* Prepare and send VDM */
1281 memset(&msg, 0, sizeof(msg));
1282 msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF,
1283 port->pwr_role,
1284 port->data_role,
2eadc33f 1285 port->negotiated_rev,
f0690a25
GR		 1286 port->message_id, port->vdo_count);
1287 for (i = 0; i < port->vdo_count; i++)
1288 msg.payload[i] = cpu_to_le32(port->vdo_data[i]);
1289 res = tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
1290 if (res < 0) {
1291 port->vdm_state = VDM_STATE_ERR_SEND;
1292 } else {
1293 unsigned long timeout;
1294
1295 port->vdm_retries = 0;
1296 port->vdm_state = VDM_STATE_BUSY;
1297 timeout = vdm_ready_timeout(port->vdo_data[0]);
1298 mod_delayed_work(port->wq, &port->vdm_state_machine,
1299 timeout);
1300 }
1301 break;
1302 case VDM_STATE_WAIT_RSP_BUSY:
1303 port->vdo_data[0] = port->vdo_retry;
1304 port->vdo_count = 1;
1305 port->vdm_state = VDM_STATE_READY;
1306 break;
1307 case VDM_STATE_BUSY:
1308 port->vdm_state = VDM_STATE_ERR_TMOUT;
1309 break;
1310 case VDM_STATE_ERR_SEND:
1311 /*
1312 * A partner which does not support USB PD will not reply,
1313 * so this is not a fatal error. At the same time, some
1314 * devices may not return GoodCRC under some circumstances,
1315 * so we need to retry.
1316 */
1317 if (port->vdm_retries < 3) {
1318 tcpm_log(port, "VDM Tx error, retry");
1319 port->vdm_retries++;
1320 port->vdm_state = VDM_STATE_READY;
1321 }
1322 break;
1323 default:
1324 break;
1325 }
1326}
1327
1328static void vdm_state_machine_work(struct work_struct *work)
1329{
1330 struct tcpm_port *port = container_of(work, struct tcpm_port,
1331 vdm_state_machine.work);
1332 enum vdm_states prev_state;
1333
1334 mutex_lock(&port->lock);
1335
1336 /*
1337 * Continue running as long as the port is not busy and there was
1338 * a state change.
1339 */
1340 do {
1341 prev_state = port->vdm_state;
1342 vdm_run_state_machine(port);
1343 } while (port->vdm_state != prev_state &&
1344 port->vdm_state != VDM_STATE_BUSY);
1345
1346 mutex_unlock(&port->lock);
1347}
1348
5007e1b5
BJS		 1349enum pdo_err {
1350 PDO_NO_ERR,
1351 PDO_ERR_NO_VSAFE5V,
1352 PDO_ERR_VSAFE5V_NOT_FIRST,
1353 PDO_ERR_PDO_TYPE_NOT_IN_ORDER,
1354 PDO_ERR_FIXED_NOT_SORTED,
1355 PDO_ERR_VARIABLE_BATT_NOT_SORTED,
1356 PDO_ERR_DUPE_PDO,
2eadc33f
AT		 1357 PDO_ERR_PPS_APDO_NOT_SORTED,
1358 PDO_ERR_DUPE_PPS_APDO,
5007e1b5
BJS		 1359};
1360
1361static const char * const pdo_err_msg[] = {
1362 [PDO_ERR_NO_VSAFE5V] =
1363 " err: source/sink caps should atleast have vSafe5V",
1364 [PDO_ERR_VSAFE5V_NOT_FIRST] =
1365 " err: vSafe5V Fixed Supply Object Shall always be the first object",
1366 [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] =
1367 " err: PDOs should be in the following order: Fixed; Battery; Variable",
1368 [PDO_ERR_FIXED_NOT_SORTED] =
1369 " err: Fixed supply pdos should be in increasing order of their fixed voltage",
1370 [PDO_ERR_VARIABLE_BATT_NOT_SORTED] =
1371 " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage",
1372 [PDO_ERR_DUPE_PDO] =
1373 " err: Variable/Batt supply pdos cannot have same min/max voltage",
2eadc33f
AT		 1374 [PDO_ERR_PPS_APDO_NOT_SORTED] =
1375 " err: Programmable power supply apdos should be in increasing order of their maximum voltage",
1376 [PDO_ERR_DUPE_PPS_APDO] =
1377 " err: Programmable power supply apdos cannot have same min/max voltage and max current",
5007e1b5
BJS		 1378};
1379
1380static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo,
1381 unsigned int nr_pdo)
1382{
1383 unsigned int i;
1384
1385 /* Should at least contain vSafe5v */
1386 if (nr_pdo < 1)
1387 return PDO_ERR_NO_VSAFE5V;
1388
1389 /* The vSafe5V Fixed Supply Object Shall always be the first object */
1390 if (pdo_type(pdo[0]) != PDO_TYPE_FIXED ||
1391 pdo_fixed_voltage(pdo[0]) != VSAFE5V)
1392 return PDO_ERR_VSAFE5V_NOT_FIRST;
1393
1394 for (i = 1; i < nr_pdo; i++) {
1395 if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) {
1396 return PDO_ERR_PDO_TYPE_NOT_IN_ORDER;
1397 } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) {
1398 enum pd_pdo_type type = pdo_type(pdo[i]);
1399
1400 switch (type) {
1401 /*
1402 * The remaining Fixed Supply Objects, if
1403 * present, shall be sent in voltage order;
1404 * lowest to highest.
1405 */
1406 case PDO_TYPE_FIXED:
1407 if (pdo_fixed_voltage(pdo[i]) <=
1408 pdo_fixed_voltage(pdo[i - 1]))
1409 return PDO_ERR_FIXED_NOT_SORTED;
1410 break;
1411 /*
1412 * The Battery Supply Objects and Variable
1413 * supply, if present shall be sent in Minimum
1414 * Voltage order; lowest to highest.
1415 */
1416 case PDO_TYPE_VAR:
1417 case PDO_TYPE_BATT:
1418 if (pdo_min_voltage(pdo[i]) <
1419 pdo_min_voltage(pdo[i - 1]))
1420 return PDO_ERR_VARIABLE_BATT_NOT_SORTED;
1421 else if ((pdo_min_voltage(pdo[i]) ==
1422 pdo_min_voltage(pdo[i - 1])) &&
1423 (pdo_max_voltage(pdo[i]) ==
1424 pdo_min_voltage(pdo[i - 1])))
1425 return PDO_ERR_DUPE_PDO;
1426 break;
2eadc33f
AT		 1427 /*
1428 * The Programmable Power Supply APDOs, if present,
1429 * shall be sent in Maximum Voltage order;
1430 * lowest to highest.
1431 */
1432 case PDO_TYPE_APDO:
1433 if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS)
1434 break;
1435
1b6af2f5
AT		 1436 if (pdo_pps_apdo_max_voltage(pdo[i]) <
1437 pdo_pps_apdo_max_voltage(pdo[i - 1]))
2eadc33f
AT		 1438 return PDO_ERR_PPS_APDO_NOT_SORTED;
1439 else if (pdo_pps_apdo_min_voltage(pdo[i]) ==
1440 pdo_pps_apdo_min_voltage(pdo[i - 1]) &&
1441 pdo_pps_apdo_max_voltage(pdo[i]) ==
1442 pdo_pps_apdo_max_voltage(pdo[i - 1]) &&
1443 pdo_pps_apdo_max_current(pdo[i]) ==
1444 pdo_pps_apdo_max_current(pdo[i - 1]))
1445 return PDO_ERR_DUPE_PPS_APDO;
1446 break;
5007e1b5
BJS		 1447 default:
1448 tcpm_log_force(port, " Unknown pdo type");
1449 }
1450 }
1451 }
1452
1453 return PDO_NO_ERR;
1454}
1455
1456static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo,
1457 unsigned int nr_pdo)
1458{
1459 enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo);
1460
1461 if (err_index != PDO_NO_ERR) {
1462 tcpm_log_force(port, " %s", pdo_err_msg[err_index]);
1463 return -EINVAL;
1464 }
1465
1466 return 0;
1467}
1468
e9576fe8
HK		 1469static int tcpm_altmode_enter(struct typec_altmode *altmode)
1470{
1471 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1472 u32 header;
1473
1474 mutex_lock(&port->lock);
1475 header = VDO(altmode->svid, 1, CMD_ENTER_MODE);
1476 header |= VDO_OPOS(altmode->mode);
1477
1478 tcpm_queue_vdm(port, header, NULL, 0);
1479 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1480 mutex_unlock(&port->lock);
1481
1482 return 0;
1483}
1484
1485static int tcpm_altmode_exit(struct typec_altmode *altmode)
1486{
1487 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1488 u32 header;
1489
1490 mutex_lock(&port->lock);
1491 header = VDO(altmode->svid, 1, CMD_EXIT_MODE);
1492 header |= VDO_OPOS(altmode->mode);
1493
1494 tcpm_queue_vdm(port, header, NULL, 0);
1495 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1496 mutex_unlock(&port->lock);
1497
1498 return 0;
1499}
1500
1501static int tcpm_altmode_vdm(struct typec_altmode *altmode,
1502 u32 header, const u32 *data, int count)
1503{
1504 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1505
1506 mutex_lock(&port->lock);
1507 tcpm_queue_vdm(port, header, data, count - 1);
1508 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1509 mutex_unlock(&port->lock);
1510
1511 return 0;
1512}
1513
1514static const struct typec_altmode_ops tcpm_altmode_ops = {
1515 .enter = tcpm_altmode_enter,
1516 .exit = tcpm_altmode_exit,
1517 .vdm = tcpm_altmode_vdm,
1518};
1519
f0690a25
GR		 1520/*
1521 * PD (data, control) command handling functions
1522 */
64f7c494
AT		 1523static inline enum tcpm_state ready_state(struct tcpm_port *port)
1524{
1525 if (port->pwr_role == TYPEC_SOURCE)
1526 return SRC_READY;
1527 else
1528 return SNK_READY;
1529}
2eadc33f
AT		 1530
1531static int tcpm_pd_send_control(struct tcpm_port *port,
1532 enum pd_ctrl_msg_type type);
1533
64f7c494
AT		 1534static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload,
1535 int cnt)
1536{
1537 u32 p0 = le32_to_cpu(payload[0]);
1538 unsigned int type = usb_pd_ado_type(p0);
1539
1540 if (!type) {
1541 tcpm_log(port, "Alert message received with no type");
1542 return;
1543 }
1544
1545 /* Just handling non-battery alerts for now */
1546 if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) {
1547 switch (port->state) {
1548 case SRC_READY:
1549 case SNK_READY:
1550 tcpm_set_state(port, GET_STATUS_SEND, 0);
1551 break;
1552 default:
1553 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1554 break;
1555 }
1556 }
1557}
1558
f0690a25
GR		 1559static void tcpm_pd_data_request(struct tcpm_port *port,
1560 const struct pd_message *msg)
1561{
1562 enum pd_data_msg_type type = pd_header_type_le(msg->header);
1563 unsigned int cnt = pd_header_cnt_le(msg->header);
2eadc33f 1564 unsigned int rev = pd_header_rev_le(msg->header);
f0690a25
GR		 1565 unsigned int i;
1566
1567 switch (type) {
1568 case PD_DATA_SOURCE_CAP:
1569 if (port->pwr_role != TYPEC_SINK)
1570 break;
1571
1572 for (i = 0; i < cnt; i++)
1573 port->source_caps[i] = le32_to_cpu(msg->payload[i]);
1574
1575 port->nr_source_caps = cnt;
1576
1577 tcpm_log_source_caps(port);
1578
5007e1b5
BJS		 1579 tcpm_validate_caps(port, port->source_caps,
1580 port->nr_source_caps);
1581
2eadc33f
AT		 1582 /*
1583 * Adjust revision in subsequent message headers, as required,
1584 * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
1585 * support Rev 1.0 so just do nothing in that scenario.
1586 */
1587 if (rev == PD_REV10)
1588 break;
1589
1590 if (rev < PD_MAX_REV)
1591 port->negotiated_rev = rev;
1592
f0690a25
GR		 1593 /*
1594 * This message may be received even if VBUS is not
1595 * present. This is quite unexpected; see USB PD
1596 * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2.
1597 * However, at the same time, we must be ready to
1598 * receive this message and respond to it 15ms after
1599 * receiving PS_RDY during power swap operations, no matter
1600 * if VBUS is available or not (USB PD specification,
1601 * section 6.5.9.2).
1602 * So we need to accept the message either way,
1603 * but be prepared to keep waiting for VBUS after it was
1604 * handled.
1605 */
1606 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
1607 break;
1608 case PD_DATA_REQUEST:
1609 if (port->pwr_role != TYPEC_SOURCE ||
1610 cnt != 1) {
1611 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1612 break;
1613 }
2eadc33f
AT		 1614
1615 /*
1616 * Adjust revision in subsequent message headers, as required,
1617 * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
1618 * support Rev 1.0 so just reject in that scenario.
1619 */
1620 if (rev == PD_REV10) {
1621 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1622 break;
1623 }
1624
1625 if (rev < PD_MAX_REV)
1626 port->negotiated_rev = rev;
1627
f0690a25
GR		 1628 port->sink_request = le32_to_cpu(msg->payload[0]);
1629 tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0);
1630 break;
1631 case PD_DATA_SINK_CAP:
1632 /* We don't do anything with this at the moment... */
1633 for (i = 0; i < cnt; i++)
1634 port->sink_caps[i] = le32_to_cpu(msg->payload[i]);
1635 port->nr_sink_caps = cnt;
1636 break;
1637 case PD_DATA_VENDOR_DEF:
1638 tcpm_handle_vdm_request(port, msg->payload, cnt);
1639 break;
1640 case PD_DATA_BIST:
1641 if (port->state == SRC_READY || port->state == SNK_READY) {
1642 port->bist_request = le32_to_cpu(msg->payload[0]);
1643 tcpm_set_state(port, BIST_RX, 0);
1644 }
1645 break;
64f7c494
AT		 1646 case PD_DATA_ALERT:
1647 tcpm_handle_alert(port, msg->payload, cnt);
1648 break;
1649 case PD_DATA_BATT_STATUS:
1650 case PD_DATA_GET_COUNTRY_INFO:
1651 /* Currently unsupported */
1652 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1653 break;
f0690a25
GR		 1654 default:
1655 tcpm_log(port, "Unhandled data message type %#x", type);
1656 break;
1657 }
1658}
1659
2eadc33f
AT		 1660static void tcpm_pps_complete(struct tcpm_port *port, int result)
1661{
1662 if (port->pps_pending) {
1663 port->pps_status = result;
1664 port->pps_pending = false;
1665 complete(&port->pps_complete);
1666 }
1667}
1668
f0690a25
GR		 1669static void tcpm_pd_ctrl_request(struct tcpm_port *port,
1670 const struct pd_message *msg)
1671{
1672 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
1673 enum tcpm_state next_state;
1674
1675 switch (type) {
1676 case PD_CTRL_GOOD_CRC:
1677 case PD_CTRL_PING:
1678 break;
1679 case PD_CTRL_GET_SOURCE_CAP:
1680 switch (port->state) {
1681 case SRC_READY:
1682 case SNK_READY:
1683 tcpm_queue_message(port, PD_MSG_DATA_SOURCE_CAP);
1684 break;
1685 default:
1686 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1687 break;
1688 }
1689 break;
1690 case PD_CTRL_GET_SINK_CAP:
1691 switch (port->state) {
1692 case SRC_READY:
1693 case SNK_READY:
1694 tcpm_queue_message(port, PD_MSG_DATA_SINK_CAP);
1695 break;
1696 default:
1697 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1698 break;
1699 }
1700 break;
1701 case PD_CTRL_GOTO_MIN:
1702 break;
1703 case PD_CTRL_PS_RDY:
1704 switch (port->state) {
1705 case SNK_TRANSITION_SINK:
1706 if (port->vbus_present) {
1707 tcpm_set_current_limit(port,
1708 port->current_limit,
1709 port->supply_voltage);
8bf05746 1710 port->explicit_contract = true;
f0690a25
GR		 1711 tcpm_set_state(port, SNK_READY, 0);
1712 } else {
1713 /*
1714 * Seen after power swap. Keep waiting for VBUS
1715 * in a transitional state.
1716 */
1717 tcpm_set_state(port,
1718 SNK_TRANSITION_SINK_VBUS, 0);
1719 }
1720 break;
b965b631 1721 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
f0690a25
GR		 1722 tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0);
1723 break;
1724 case PR_SWAP_SNK_SRC_SINK_OFF:
1725 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0);
1726 break;
1727 case VCONN_SWAP_WAIT_FOR_VCONN:
1728 tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0);
1729 break;
1730 default:
1731 break;
1732 }
1733 break;
1734 case PD_CTRL_REJECT:
1735 case PD_CTRL_WAIT:
64f7c494 1736 case PD_CTRL_NOT_SUPP:
f0690a25
GR		 1737 switch (port->state) {
1738 case SNK_NEGOTIATE_CAPABILITIES:
1739 /* USB PD specification, Figure 8-43 */
1740 if (port->explicit_contract)
1741 next_state = SNK_READY;
1742 else
1743 next_state = SNK_WAIT_CAPABILITIES;
1744 tcpm_set_state(port, next_state, 0);
1745 break;
2eadc33f
AT		 1746 case SNK_NEGOTIATE_PPS_CAPABILITIES:
1747 /* Revert data back from any requested PPS updates */
1748 port->pps_data.out_volt = port->supply_voltage;
1749 port->pps_data.op_curr = port->current_limit;
1750 port->pps_status = (type == PD_CTRL_WAIT ?
1751 -EAGAIN : -EOPNOTSUPP);
1752 tcpm_set_state(port, SNK_READY, 0);
1753 break;
f0690a25
GR		 1754 case DR_SWAP_SEND:
1755 port->swap_status = (type == PD_CTRL_WAIT ?
1756 -EAGAIN : -EOPNOTSUPP);
1757 tcpm_set_state(port, DR_SWAP_CANCEL, 0);
1758 break;
1759 case PR_SWAP_SEND:
1760 port->swap_status = (type == PD_CTRL_WAIT ?
1761 -EAGAIN : -EOPNOTSUPP);
1762 tcpm_set_state(port, PR_SWAP_CANCEL, 0);
1763 break;
1764 case VCONN_SWAP_SEND:
1765 port->swap_status = (type == PD_CTRL_WAIT ?
1766 -EAGAIN : -EOPNOTSUPP);
1767 tcpm_set_state(port, VCONN_SWAP_CANCEL, 0);
1768 break;
1769 default:
1770 break;
1771 }
1772 break;
1773 case PD_CTRL_ACCEPT:
1774 switch (port->state) {
1775 case SNK_NEGOTIATE_CAPABILITIES:
2eadc33f
AT		 1776 port->pps_data.active = false;
1777 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
1778 break;
1779 case SNK_NEGOTIATE_PPS_CAPABILITIES:
1780 port->pps_data.active = true;
1781 port->supply_voltage = port->pps_data.out_volt;
1782 port->current_limit = port->pps_data.op_curr;
f0690a25
GR		 1783 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
1784 break;
1785 case SOFT_RESET_SEND:
1786 port->message_id = 0;
5fec4b54 1787 port->rx_msgid = -1;
f0690a25
GR		 1788 if (port->pwr_role == TYPEC_SOURCE)
1789 next_state = SRC_SEND_CAPABILITIES;
1790 else
1791 next_state = SNK_WAIT_CAPABILITIES;
1792 tcpm_set_state(port, next_state, 0);
1793 break;
1794 case DR_SWAP_SEND:
1795 tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0);
1796 break;
1797 case PR_SWAP_SEND:
1798 tcpm_set_state(port, PR_SWAP_START, 0);
1799 break;
1800 case VCONN_SWAP_SEND:
1801 tcpm_set_state(port, VCONN_SWAP_START, 0);
1802 break;
1803 default:
1804 break;
1805 }
1806 break;
1807 case PD_CTRL_SOFT_RESET:
1808 tcpm_set_state(port, SOFT_RESET, 0);
1809 break;
1810 case PD_CTRL_DR_SWAP:
9b0ae699 1811 if (port->port_type != TYPEC_PORT_DRP) {
f0690a25
GR		 1812 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1813 break;
1814 }
1815 /*
1816 * XXX
1817 * 6.3.9: If an alternate mode is active, a request to swap
1818 * alternate modes shall trigger a port reset.
1819 */
1820 switch (port->state) {
1821 case SRC_READY:
1822 case SNK_READY:
1823 tcpm_set_state(port, DR_SWAP_ACCEPT, 0);
1824 break;
1825 default:
1826 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1827 break;
1828 }
1829 break;
1830 case PD_CTRL_PR_SWAP:
9b0ae699 1831 if (port->port_type != TYPEC_PORT_DRP) {
f0690a25
GR		 1832 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1833 break;
1834 }
1835 switch (port->state) {
1836 case SRC_READY:
1837 case SNK_READY:
1838 tcpm_set_state(port, PR_SWAP_ACCEPT, 0);
1839 break;
1840 default:
1841 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1842 break;
1843 }
1844 break;
1845 case PD_CTRL_VCONN_SWAP:
1846 switch (port->state) {
1847 case SRC_READY:
1848 case SNK_READY:
1849 tcpm_set_state(port, VCONN_SWAP_ACCEPT, 0);
1850 break;
1851 default:
1852 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1853 break;
1854 }
1855 break;
64f7c494
AT		 1856 case PD_CTRL_GET_SOURCE_CAP_EXT:
1857 case PD_CTRL_GET_STATUS:
1858 case PD_CTRL_FR_SWAP:
1859 case PD_CTRL_GET_PPS_STATUS:
1860 case PD_CTRL_GET_COUNTRY_CODES:
1861 /* Currently not supported */
1862 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1863 break;
f0690a25
GR		 1864 default:
1865 tcpm_log(port, "Unhandled ctrl message type %#x", type);
1866 break;
1867 }
1868}
1869
64f7c494
AT		 1870static void tcpm_pd_ext_msg_request(struct tcpm_port *port,
1871 const struct pd_message *msg)
1872{
1873 enum pd_ext_msg_type type = pd_header_type_le(msg->header);
1874 unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header);
1875
25242703 1876 if (!(msg->ext_msg.header & PD_EXT_HDR_CHUNKED)) {
64f7c494
AT		 1877 tcpm_log(port, "Unchunked extended messages unsupported");
1878 return;
1879 }
1880
1881 if (data_size > PD_EXT_MAX_CHUNK_DATA) {
1882 tcpm_log(port, "Chunk handling not yet supported");
1883 return;
1884 }
1885
1886 switch (type) {
1887 case PD_EXT_STATUS:
1888 /*
1889 * If PPS related events raised then get PPS status to clear
1890 * (see USB PD 3.0 Spec, 6.5.2.4)
1891 */
1892 if (msg->ext_msg.data[USB_PD_EXT_SDB_EVENT_FLAGS] &
1893 USB_PD_EXT_SDB_PPS_EVENTS)
1894 tcpm_set_state(port, GET_PPS_STATUS_SEND, 0);
1895 else
1896 tcpm_set_state(port, ready_state(port), 0);
1897 break;
1898 case PD_EXT_PPS_STATUS:
1899 /*
1900 * For now the PPS status message is used to clear events
1901 * and nothing more.
1902 */
1903 tcpm_set_state(port, ready_state(port), 0);
1904 break;
1905 case PD_EXT_SOURCE_CAP_EXT:
1906 case PD_EXT_GET_BATT_CAP:
1907 case PD_EXT_GET_BATT_STATUS:
1908 case PD_EXT_BATT_CAP:
1909 case PD_EXT_GET_MANUFACTURER_INFO:
1910 case PD_EXT_MANUFACTURER_INFO:
1911 case PD_EXT_SECURITY_REQUEST:
1912 case PD_EXT_SECURITY_RESPONSE:
1913 case PD_EXT_FW_UPDATE_REQUEST:
1914 case PD_EXT_FW_UPDATE_RESPONSE:
1915 case PD_EXT_COUNTRY_INFO:
1916 case PD_EXT_COUNTRY_CODES:
1917 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1918 break;
1919 default:
1920 tcpm_log(port, "Unhandled extended message type %#x", type);
1921 break;
1922 }
1923}
1924
f0690a25
GR		 1925static void tcpm_pd_rx_handler(struct work_struct *work)
1926{
1927 struct pd_rx_event *event = container_of(work,
1928 struct pd_rx_event, work);
1929 const struct pd_message *msg = &event->msg;
1930 unsigned int cnt = pd_header_cnt_le(msg->header);
1931 struct tcpm_port *port = event->port;
1932
1933 mutex_lock(&port->lock);
1934
1935 tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header),
1936 port->attached);
1937
1938 if (port->attached) {
5fec4b54
GR		 1939 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
1940 unsigned int msgid = pd_header_msgid_le(msg->header);
1941
1942 /*
1943 * USB PD standard, 6.6.1.2:
1944 * "... if MessageID value in a received Message is the
1945 * same as the stored value, the receiver shall return a
1946 * GoodCRC Message with that MessageID value and drop
1947 * the Message (this is a retry of an already received
1948 * Message). Note: this shall not apply to the Soft_Reset
1949 * Message which always has a MessageID value of zero."
1950 */
1951 if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET)
1952 goto done;
1953 port->rx_msgid = msgid;
1954
f0690a25
GR		 1955 /*
1956 * If both ends believe to be DFP/host, we have a data role
1957 * mismatch.
1958 */
1959 if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) ==
1960 (port->data_role == TYPEC_HOST)) {
1961 tcpm_log(port,
1962 "Data role mismatch, initiating error recovery");
1963 tcpm_set_state(port, ERROR_RECOVERY, 0);
1964 } else {
64f7c494
AT		 1965 if (msg->header & PD_HEADER_EXT_HDR)
1966 tcpm_pd_ext_msg_request(port, msg);
1967 else if (cnt)
f0690a25
GR		 1968 tcpm_pd_data_request(port, msg);
1969 else
1970 tcpm_pd_ctrl_request(port, msg);
1971 }
1972 }
1973
5fec4b54 1974done:
f0690a25
GR		 1975 mutex_unlock(&port->lock);
1976 kfree(event);
1977}
1978
1979void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg)
1980{
1981 struct pd_rx_event *event;
1982
1983 event = kzalloc(sizeof(*event), GFP_ATOMIC);
1984 if (!event)
1985 return;
1986
1987 INIT_WORK(&event->work, tcpm_pd_rx_handler);
1988 event->port = port;
1989 memcpy(&event->msg, msg, sizeof(*msg));
1990 queue_work(port->wq, &event->work);
1991}
1992EXPORT_SYMBOL_GPL(tcpm_pd_receive);
1993
1994static int tcpm_pd_send_control(struct tcpm_port *port,
1995 enum pd_ctrl_msg_type type)
1996{
1997 struct pd_message msg;
1998
1999 memset(&msg, 0, sizeof(msg));
2000 msg.header = PD_HEADER_LE(type, port->pwr_role,
2001 port->data_role,
2eadc33f 2002 port->negotiated_rev,
f0690a25
GR		 2003 port->message_id, 0);
2004
2005 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2006}
2007
2008/*
2009 * Send queued message without affecting state.
2010 * Return true if state machine should go back to sleep,
2011 * false otherwise.
2012 */
2013static bool tcpm_send_queued_message(struct tcpm_port *port)
2014{
2015 enum pd_msg_request queued_message;
2016
2017 do {
2018 queued_message = port->queued_message;
2019 port->queued_message = PD_MSG_NONE;
2020
2021 switch (queued_message) {
2022 case PD_MSG_CTRL_WAIT:
2023 tcpm_pd_send_control(port, PD_CTRL_WAIT);
2024 break;
2025 case PD_MSG_CTRL_REJECT:
2026 tcpm_pd_send_control(port, PD_CTRL_REJECT);
2027 break;
64f7c494
AT		 2028 case PD_MSG_CTRL_NOT_SUPP:
2029 tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP);
2030 break;
f0690a25
GR		 2031 case PD_MSG_DATA_SINK_CAP:
2032 tcpm_pd_send_sink_caps(port);
2033 break;
2034 case PD_MSG_DATA_SOURCE_CAP:
2035 tcpm_pd_send_source_caps(port);
2036 break;
2037 default:
2038 break;
2039 }
2040 } while (port->queued_message != PD_MSG_NONE);
2041
2042 if (port->delayed_state != INVALID_STATE) {
2043 if (time_is_after_jiffies(port->delayed_runtime)) {
2044 mod_delayed_work(port->wq, &port->state_machine,
2045 port->delayed_runtime - jiffies);
2046 return true;
2047 }
2048 port->delayed_state = INVALID_STATE;
2049 }
2050 return false;
2051}
2052
2053static int tcpm_pd_check_request(struct tcpm_port *port)
2054{
2055 u32 pdo, rdo = port->sink_request;
2056 unsigned int max, op, pdo_max, index;
2057 enum pd_pdo_type type;
2058
2059 index = rdo_index(rdo);
2060 if (!index || index > port->nr_src_pdo)
2061 return -EINVAL;
2062
2063 pdo = port->src_pdo[index - 1];
2064 type = pdo_type(pdo);
2065 switch (type) {
2066 case PDO_TYPE_FIXED:
2067 case PDO_TYPE_VAR:
2068 max = rdo_max_current(rdo);
2069 op = rdo_op_current(rdo);
2070 pdo_max = pdo_max_current(pdo);
2071
2072 if (op > pdo_max)
2073 return -EINVAL;
2074 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
2075 return -EINVAL;
2076
2077 if (type == PDO_TYPE_FIXED)
2078 tcpm_log(port,
2079 "Requested %u mV, %u mA for %u / %u mA",
2080 pdo_fixed_voltage(pdo), pdo_max, op, max);
2081 else
2082 tcpm_log(port,
2083 "Requested %u -> %u mV, %u mA for %u / %u mA",
2084 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
2085 pdo_max, op, max);
2086 break;
2087 case PDO_TYPE_BATT:
2088 max = rdo_max_power(rdo);
2089 op = rdo_op_power(rdo);
2090 pdo_max = pdo_max_power(pdo);
2091
2092 if (op > pdo_max)
2093 return -EINVAL;
2094 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
2095 return -EINVAL;
2096 tcpm_log(port,
2097 "Requested %u -> %u mV, %u mW for %u / %u mW",
2098 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
2099 pdo_max, op, max);
2100 break;
2101 default:
2102 return -EINVAL;
2103 }
2104
2105 port->op_vsafe5v = index == 1;
2106
2107 return 0;
2108}
2109
53fe0de9
LJ		 2110#define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y))
2111#define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y))
2112
2113static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo,
2114 int *src_pdo)
f0690a25 2115{
53fe0de9
LJ		 2116 unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0,
2117 max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0,
2118 min_snk_mv = 0;
f0690a25
GR		 2119 int ret = -EINVAL;
2120
2eadc33f 2121 port->pps_data.supported = false;
f2a8aa05 2122 port->usb_type = POWER_SUPPLY_USB_TYPE_PD;
2eadc33f 2123
f0690a25 2124 /*
53fe0de9
LJ		 2125 * Select the source PDO providing the most power which has a
2126 * matchig sink cap.
f0690a25
GR		 2127 */
2128 for (i = 0; i < port->nr_source_caps; i++) {
2129 u32 pdo = port->source_caps[i];
2130 enum pd_pdo_type type = pdo_type(pdo);
f0690a25 2131
2eadc33f
AT		 2132 switch (type) {
2133 case PDO_TYPE_FIXED:
53fe0de9
LJ		 2134 max_src_mv = pdo_fixed_voltage(pdo);
2135 min_src_mv = max_src_mv;
2eadc33f
AT		 2136 break;
2137 case PDO_TYPE_BATT:
2138 case PDO_TYPE_VAR:
53fe0de9
LJ		 2139 max_src_mv = pdo_max_voltage(pdo);
2140 min_src_mv = pdo_min_voltage(pdo);
2eadc33f
AT		 2141 break;
2142 case PDO_TYPE_APDO:
f2a8aa05 2143 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) {
2eadc33f 2144 port->pps_data.supported = true;
f2a8aa05
AT		 2145 port->usb_type =
2146 POWER_SUPPLY_USB_TYPE_PD_PPS;
2147 }
2eadc33f
AT		 2148 continue;
2149 default:
2150 tcpm_log(port, "Invalid source PDO type, ignoring");
2151 continue;
53fe0de9 2152 }
6f566af3 2153
2eadc33f
AT		 2154 switch (type) {
2155 case PDO_TYPE_FIXED:
2156 case PDO_TYPE_VAR:
53fe0de9
LJ		 2157 src_ma = pdo_max_current(pdo);
2158 src_mw = src_ma * min_src_mv / 1000;
2eadc33f
AT		 2159 break;
2160 case PDO_TYPE_BATT:
2161 src_mw = pdo_max_power(pdo);
2162 break;
2163 case PDO_TYPE_APDO:
2164 continue;
2165 default:
2166 tcpm_log(port, "Invalid source PDO type, ignoring");
2167 continue;
6f566af3
HG		 2168 }
2169
53fe0de9
LJ		 2170 for (j = 0; j < port->nr_snk_pdo; j++) {
2171 pdo = port->snk_pdo[j];
2172
2eadc33f
AT		 2173 switch (pdo_type(pdo)) {
2174 case PDO_TYPE_FIXED:
53fe0de9 2175 max_snk_mv = pdo_fixed_voltage(pdo);
2eadc33f
AT		 2176 min_snk_mv = max_snk_mv;
2177 break;
2178 case PDO_TYPE_BATT:
2179 case PDO_TYPE_VAR:
53fe0de9 2180 max_snk_mv = pdo_max_voltage(pdo);
2eadc33f
AT		 2181 min_snk_mv = pdo_min_voltage(pdo);
2182 break;
2183 case PDO_TYPE_APDO:
2184 continue;
2185 default:
2186 tcpm_log(port, "Invalid sink PDO type, ignoring");
2187 continue;
53fe0de9
LJ		 2188 }
2189
2190 if (max_src_mv <= max_snk_mv &&
2191 min_src_mv >= min_snk_mv) {
2192 /* Prefer higher voltages if available */
2193 if ((src_mw == max_mw && min_src_mv > max_mv) ||
2194 src_mw > max_mw) {
2195 *src_pdo = i;
2196 *sink_pdo = j;
2197 max_mw = src_mw;
2198 max_mv = min_src_mv;
2199 ret = 0;
2200 }
2201 }
f0690a25
GR		 2202 }
2203 }
2204
2205 return ret;
2206}
2207
2eadc33f
AT		 2208#define min_pps_apdo_current(x, y) \
2209 min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y))
2210
2211static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port)
2212{
2213 unsigned int i, j, max_mw = 0, max_mv = 0;
2214 unsigned int min_src_mv, max_src_mv, src_ma, src_mw;
8e4657c6 2215 unsigned int min_snk_mv, max_snk_mv;
2eadc33f
AT		 2216 u32 pdo;
2217 unsigned int src_pdo = 0, snk_pdo = 0;
2218
2219 /*
2220 * Select the source PPS APDO providing the most power while staying
2221 * within the board's limits. We skip the first PDO as this is always
2222 * 5V 3A.
2223 */
2224 for (i = 1; i < port->nr_source_caps; ++i) {
2225 pdo = port->source_caps[i];
2226
2227 switch (pdo_type(pdo)) {
2228 case PDO_TYPE_APDO:
2229 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2230 tcpm_log(port, "Not PPS APDO (source), ignoring");
2231 continue;
2232 }
2233
2234 min_src_mv = pdo_pps_apdo_min_voltage(pdo);
2235 max_src_mv = pdo_pps_apdo_max_voltage(pdo);
2236 src_ma = pdo_pps_apdo_max_current(pdo);
2237 src_mw = (src_ma * max_src_mv) / 1000;
2238
2239 /*
2240 * Now search through the sink PDOs to find a matching
2241 * PPS APDO. Again skip the first sink PDO as this will
2242 * always be 5V 3A.
2243 */
c413767e 2244 for (j = 1; j < port->nr_snk_pdo; j++) {
2eadc33f
AT		 2245 pdo = port->snk_pdo[j];
2246
2247 switch (pdo_type(pdo)) {
2248 case PDO_TYPE_APDO:
2249 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2250 tcpm_log(port,
2251 "Not PPS APDO (sink), ignoring");
2252 continue;
2253 }
2254
2255 min_snk_mv =
2256 pdo_pps_apdo_min_voltage(pdo);
2257 max_snk_mv =
2258 pdo_pps_apdo_max_voltage(pdo);
2eadc33f
AT		 2259 break;
2260 default:
2261 tcpm_log(port,
2262 "Not APDO type (sink), ignoring");
2263 continue;
2264 }
2265
2266 if (max_src_mv <= max_snk_mv &&
2267 min_src_mv >= min_snk_mv) {
2268 /* Prefer higher voltages if available */
2269 if ((src_mw == max_mw &&
2270 min_src_mv > max_mv) ||
2271 src_mw > max_mw) {
2272 src_pdo = i;
2273 snk_pdo = j;
2274 max_mw = src_mw;
2275 max_mv = max_src_mv;
2276 }
2277 }
2278 }
2279
2280 break;
2281 default:
2282 tcpm_log(port, "Not APDO type (source), ignoring");
2283 continue;
2284 }
2285 }
2286
2287 if (src_pdo) {
2288 pdo = port->source_caps[src_pdo];
2289
2290 port->pps_data.min_volt = pdo_pps_apdo_min_voltage(pdo);
2291 port->pps_data.max_volt = pdo_pps_apdo_max_voltage(pdo);
2292 port->pps_data.max_curr =
2293 min_pps_apdo_current(pdo, port->snk_pdo[snk_pdo]);
2294 port->pps_data.out_volt =
2295 min(pdo_pps_apdo_max_voltage(pdo), port->pps_data.out_volt);
2296 port->pps_data.op_curr =
2297 min(port->pps_data.max_curr, port->pps_data.op_curr);
2298 }
2299
2300 return src_pdo;
2301}
2302
f0690a25
GR		 2303static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo)
2304{
2305 unsigned int mv, ma, mw, flags;
2306 unsigned int max_ma, max_mw;
2307 enum pd_pdo_type type;
53fe0de9 2308 u32 pdo, matching_snk_pdo;
0c718676
GKH		 2309 int src_pdo_index = 0;
2310 int snk_pdo_index = 0;
53fe0de9 2311 int ret;
f0690a25 2312
53fe0de9
LJ		 2313 ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index);
2314 if (ret < 0)
2315 return ret;
2316
2317 pdo = port->source_caps[src_pdo_index];
2318 matching_snk_pdo = port->snk_pdo[snk_pdo_index];
f0690a25
GR		 2319 type = pdo_type(pdo);
2320
2eadc33f
AT		 2321 switch (type) {
2322 case PDO_TYPE_FIXED:
f0690a25 2323 mv = pdo_fixed_voltage(pdo);
2eadc33f
AT		 2324 break;
2325 case PDO_TYPE_BATT:
2326 case PDO_TYPE_VAR:
f0690a25 2327 mv = pdo_min_voltage(pdo);
2eadc33f
AT		 2328 break;
2329 default:
2330 tcpm_log(port, "Invalid PDO selected!");
2331 return -EINVAL;
2332 }
f0690a25 2333
53fe0de9 2334 /* Select maximum available current within the sink pdo's limit */
f0690a25 2335 if (type == PDO_TYPE_BATT) {
53fe0de9
LJ		 2336 mw = min_power(pdo, matching_snk_pdo);
2337 ma = 1000 * mw / mv;
f0690a25 2338 } else {
53fe0de9
LJ		 2339 ma = min_current(pdo, matching_snk_pdo);
2340 mw = ma * mv / 1000;
f0690a25 2341 }
f0690a25 2342
931693f9 2343 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
f0690a25
GR		 2344
2345 /* Set mismatch bit if offered power is less than operating power */
f0690a25
GR		 2346 max_ma = ma;
2347 max_mw = mw;
2348 if (mw < port->operating_snk_mw) {
2349 flags |= RDO_CAP_MISMATCH;
53fe0de9
LJ		 2350 if (type == PDO_TYPE_BATT &&
2351 (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo)))
2352 max_mw = pdo_max_power(matching_snk_pdo);
2353 else if (pdo_max_current(matching_snk_pdo) >
2354 pdo_max_current(pdo))
2355 max_ma = pdo_max_current(matching_snk_pdo);
f0690a25
GR		 2356 }
2357
2358 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
2359 port->cc_req, port->cc1, port->cc2, port->vbus_source,
2360 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
2361 port->polarity);
2362
2363 if (type == PDO_TYPE_BATT) {
53fe0de9 2364 *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags);
f0690a25
GR		 2365
2366 tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s",
53fe0de9 2367 src_pdo_index, mv, mw,
f0690a25
GR		 2368 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
2369 } else {
53fe0de9 2370 *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags);
f0690a25
GR		 2371
2372 tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s",
53fe0de9 2373 src_pdo_index, mv, ma,
f0690a25
GR		 2374 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
2375 }
2376
2377 port->current_limit = ma;
2378 port->supply_voltage = mv;
2379
2380 return 0;
2381}
2382
2383static int tcpm_pd_send_request(struct tcpm_port *port)
2384{
2385 struct pd_message msg;
2386 int ret;
2387 u32 rdo;
2388
2389 ret = tcpm_pd_build_request(port, &rdo);
2390 if (ret < 0)
2391 return ret;
2392
2393 memset(&msg, 0, sizeof(msg));
2394 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
2395 port->pwr_role,
2396 port->data_role,
2eadc33f
AT		 2397 port->negotiated_rev,
2398 port->message_id, 1);
2399 msg.payload[0] = cpu_to_le32(rdo);
2400
2401 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2402}
2403
2404static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo)
2405{
8e4657c6 2406 unsigned int out_mv, op_ma, op_mw, max_mv, max_ma, flags;
2eadc33f
AT		 2407 enum pd_pdo_type type;
2408 unsigned int src_pdo_index;
2409 u32 pdo;
2410
2411 src_pdo_index = tcpm_pd_select_pps_apdo(port);
2412 if (!src_pdo_index)
2413 return -EOPNOTSUPP;
2414
2415 pdo = port->source_caps[src_pdo_index];
2416 type = pdo_type(pdo);
2417
2418 switch (type) {
2419 case PDO_TYPE_APDO:
2420 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2421 tcpm_log(port, "Invalid APDO selected!");
2422 return -EINVAL;
2423 }
2eadc33f
AT		 2424 max_mv = port->pps_data.max_volt;
2425 max_ma = port->pps_data.max_curr;
2426 out_mv = port->pps_data.out_volt;
2427 op_ma = port->pps_data.op_curr;
2428 break;
2429 default:
2430 tcpm_log(port, "Invalid PDO selected!");
2431 return -EINVAL;
2432 }
2433
2434 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
2435
2436 op_mw = (op_ma * out_mv) / 1000;
2437 if (op_mw < port->operating_snk_mw) {
2438 /*
2439 * Try raising current to meet power needs. If that's not enough
2440 * then try upping the voltage. If that's still not enough
2441 * then we've obviously chosen a PPS APDO which really isn't
2442 * suitable so abandon ship.
2443 */
2444 op_ma = (port->operating_snk_mw * 1000) / out_mv;
2445 if ((port->operating_snk_mw * 1000) % out_mv)
2446 ++op_ma;
2447 op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP);
2448
2449 if (op_ma > max_ma) {
2450 op_ma = max_ma;
2451 out_mv = (port->operating_snk_mw * 1000) / op_ma;
2452 if ((port->operating_snk_mw * 1000) % op_ma)
2453 ++out_mv;
2454 out_mv += RDO_PROG_VOLT_MV_STEP -
2455 (out_mv % RDO_PROG_VOLT_MV_STEP);
2456
2457 if (out_mv > max_mv) {
2458 tcpm_log(port, "Invalid PPS APDO selected!");
2459 return -EINVAL;
2460 }
2461 }
2462 }
2463
2464 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
2465 port->cc_req, port->cc1, port->cc2, port->vbus_source,
2466 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
2467 port->polarity);
2468
2469 *rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags);
2470
2471 tcpm_log(port, "Requesting APDO %d: %u mV, %u mA",
2472 src_pdo_index, out_mv, op_ma);
2473
2474 port->pps_data.op_curr = op_ma;
2475 port->pps_data.out_volt = out_mv;
2476
2477 return 0;
2478}
2479
2480static int tcpm_pd_send_pps_request(struct tcpm_port *port)
2481{
2482 struct pd_message msg;
2483 int ret;
2484 u32 rdo;
2485
2486 ret = tcpm_pd_build_pps_request(port, &rdo);
2487 if (ret < 0)
2488 return ret;
2489
2490 memset(&msg, 0, sizeof(msg));
2491 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
2492 port->pwr_role,
2493 port->data_role,
2494 port->negotiated_rev,
f0690a25
GR		 2495 port->message_id, 1);
2496 msg.payload[0] = cpu_to_le32(rdo);
2497
2498 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2499}
2500
2501static int tcpm_set_vbus(struct tcpm_port *port, bool enable)
2502{
2503 int ret;
2504
2505 if (enable && port->vbus_charge)
2506 return -EINVAL;
2507
2508 tcpm_log(port, "vbus:=%d charge=%d", enable, port->vbus_charge);
2509
2510 ret = port->tcpc->set_vbus(port->tcpc, enable, port->vbus_charge);
2511 if (ret < 0)
2512 return ret;
2513
2514 port->vbus_source = enable;
2515 return 0;
2516}
2517
2518static int tcpm_set_charge(struct tcpm_port *port, bool charge)
2519{
2520 int ret;
2521
2522 if (charge && port->vbus_source)
2523 return -EINVAL;
2524
2525 if (charge != port->vbus_charge) {
2526 tcpm_log(port, "vbus=%d charge:=%d", port->vbus_source, charge);
2527 ret = port->tcpc->set_vbus(port->tcpc, port->vbus_source,
2528 charge);
2529 if (ret < 0)
2530 return ret;
2531 }
2532 port->vbus_charge = charge;
2533 return 0;
2534}
2535
8e04b372
LJ		 2536static bool tcpm_start_drp_toggling(struct tcpm_port *port,
2537 enum typec_cc_status cc)
f0690a25
GR		 2538{
2539 int ret;
2540
2541 if (port->tcpc->start_drp_toggling &&
9b0ae699 2542 port->port_type == TYPEC_PORT_DRP) {
f0690a25 2543 tcpm_log_force(port, "Start DRP toggling");
8e04b372 2544 ret = port->tcpc->start_drp_toggling(port->tcpc, cc);
f0690a25
GR		 2545 if (!ret)
2546 return true;
2547 }
2548
2549 return false;
2550}
2551
2552static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc)
2553{
2554 tcpm_log(port, "cc:=%d", cc);
2555 port->cc_req = cc;
2556 port->tcpc->set_cc(port->tcpc, cc);
2557}
2558
2559static int tcpm_init_vbus(struct tcpm_port *port)
2560{
2561 int ret;
2562
2563 ret = port->tcpc->set_vbus(port->tcpc, false, false);
2564 port->vbus_source = false;
2565 port->vbus_charge = false;
2566 return ret;
2567}
2568
2569static int tcpm_init_vconn(struct tcpm_port *port)
2570{
2571 int ret;
2572
2573 ret = port->tcpc->set_vconn(port->tcpc, false);
2574 port->vconn_role = TYPEC_SINK;
2575 return ret;
2576}
2577
2578static void tcpm_typec_connect(struct tcpm_port *port)
2579{
2580 if (!port->connected) {
2581 /* Make sure we don't report stale identity information */
2582 memset(&port->partner_ident, 0, sizeof(port->partner_ident));
2583 port->partner_desc.usb_pd = port->pd_capable;
2584 if (tcpm_port_is_debug(port))
2585 port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG;
2586 else if (tcpm_port_is_audio(port))
2587 port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO;
2588 else
2589 port->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
2590 port->partner = typec_register_partner(port->typec_port,
2591 &port->partner_desc);
2592 port->connected = true;
2593 }
2594}
2595
2596static int tcpm_src_attach(struct tcpm_port *port)
2597{
2598 enum typec_cc_polarity polarity =
2599 port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2
2600 : TYPEC_POLARITY_CC1;
2601 int ret;
2602
2603 if (port->attached)
2604 return 0;
2605
2606 ret = tcpm_set_polarity(port, polarity);
2607 if (ret < 0)
2608 return ret;
2609
2610 ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
2611 if (ret < 0)
2612 return ret;
2613
2614 ret = port->tcpc->set_pd_rx(port->tcpc, true);
2615 if (ret < 0)
2616 goto out_disable_mux;
2617
2618 /*
2619 * USB Type-C specification, version 1.2,
2620 * chapter 4.5.2.2.8.1 (Attached.SRC Requirements)
2621 * Enable VCONN only if the non-RD port is set to RA.
2622 */
2623 if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) ||
2624 (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) {
2625 ret = tcpm_set_vconn(port, true);
2626 if (ret < 0)
2627 goto out_disable_pd;
2628 }
2629
2630 ret = tcpm_set_vbus(port, true);
2631 if (ret < 0)
2632 goto out_disable_vconn;
2633
2634 port->pd_capable = false;
2635
2636 port->partner = NULL;
2637
2638 port->attached = true;
2639 port->send_discover = true;
2640
2641 return 0;
2642
2643out_disable_vconn:
2644 tcpm_set_vconn(port, false);
2645out_disable_pd:
2646 port->tcpc->set_pd_rx(port->tcpc, false);
2647out_disable_mux:
e9576fe8 2648 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
2000016c 2649 TYPEC_ORIENTATION_NONE);
f0690a25
GR		 2650 return ret;
2651}
2652
2653static void tcpm_typec_disconnect(struct tcpm_port *port)
2654{
2655 if (port->connected) {
2656 typec_unregister_partner(port->partner);
2657 port->partner = NULL;
2658 port->connected = false;
2659 }
2660}
2661
2662static void tcpm_unregister_altmodes(struct tcpm_port *port)
2663{
2664 struct pd_mode_data *modep = &port->mode_data;
2665 int i;
2666
2667 for (i = 0; i < modep->altmodes; i++) {
2668 typec_unregister_altmode(port->partner_altmode[i]);
2669 port->partner_altmode[i] = NULL;
2670 }
2671
2672 memset(modep, 0, sizeof(*modep));
2673}
2674
2675static void tcpm_reset_port(struct tcpm_port *port)
2676{
2677 tcpm_unregister_altmodes(port);
2678 tcpm_typec_disconnect(port);
2679 port->attached = false;
2680 port->pd_capable = false;
2eadc33f 2681 port->pps_data.supported = false;
f0690a25 2682
5fec4b54
GR		 2683 /*
2684 * First Rx ID should be 0; set this to a sentinel of -1 so that
2685 * we can check tcpm_pd_rx_handler() if we had seen it before.
2686 */
2687 port->rx_msgid = -1;
2688
f0690a25
GR		 2689 port->tcpc->set_pd_rx(port->tcpc, false);
2690 tcpm_init_vbus(port); /* also disables charging */
2691 tcpm_init_vconn(port);
2692 tcpm_set_current_limit(port, 0, 0);
2693 tcpm_set_polarity(port, TYPEC_POLARITY_CC1);
e9576fe8 2694 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
2000016c 2695 TYPEC_ORIENTATION_NONE);
f0690a25
GR		 2696 tcpm_set_attached_state(port, false);
2697 port->try_src_count = 0;
2698 port->try_snk_count = 0;
f2a8aa05
AT		 2699 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
2700
2701 power_supply_changed(port->psy);
f0690a25
GR		 2702}
2703
2704static void tcpm_detach(struct tcpm_port *port)
2705{
2706 if (!port->attached)
2707 return;
2708
2709 if (tcpm_port_is_disconnected(port))
2710 port->hard_reset_count = 0;
2711
2712 tcpm_reset_port(port);
2713}
2714
2715static void tcpm_src_detach(struct tcpm_port *port)
2716{
2717 tcpm_detach(port);
2718}
2719
2720static int tcpm_snk_attach(struct tcpm_port *port)
2721{
2722 int ret;
2723
2724 if (port->attached)
2725 return 0;
2726
2727 ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ?
2728 TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1);
2729 if (ret < 0)
2730 return ret;
2731
2732 ret = tcpm_set_roles(port, true, TYPEC_SINK, TYPEC_DEVICE);
2733 if (ret < 0)
2734 return ret;
2735
2736 port->pd_capable = false;
2737
2738 port->partner = NULL;
2739
2740 port->attached = true;
2741 port->send_discover = true;
2742
2743 return 0;
2744}
2745
2746static void tcpm_snk_detach(struct tcpm_port *port)
2747{
2748 tcpm_detach(port);
f0690a25
GR		 2749}
2750
2751static int tcpm_acc_attach(struct tcpm_port *port)
2752{
2753 int ret;
2754
2755 if (port->attached)
2756 return 0;
2757
2758 ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
2759 if (ret < 0)
2760 return ret;
2761
2762 port->partner = NULL;
2763
2764 tcpm_typec_connect(port);
2765
2766 port->attached = true;
2767
2768 return 0;
2769}
2770
2771static void tcpm_acc_detach(struct tcpm_port *port)
2772{
2773 tcpm_detach(port);
2774}
2775
2776static inline enum tcpm_state hard_reset_state(struct tcpm_port *port)
2777{
2778 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)
2779 return HARD_RESET_SEND;
2780 if (port->pd_capable)
2781 return ERROR_RECOVERY;
2782 if (port->pwr_role == TYPEC_SOURCE)
2783 return SRC_UNATTACHED;
2784 if (port->state == SNK_WAIT_CAPABILITIES)
2785 return SNK_READY;
2786 return SNK_UNATTACHED;
2787}
2788
f0690a25
GR		 2789static inline enum tcpm_state unattached_state(struct tcpm_port *port)
2790{
13cb492c
BJS		 2791 if (port->port_type == TYPEC_PORT_DRP) {
2792 if (port->pwr_role == TYPEC_SOURCE)
2793 return SRC_UNATTACHED;
2794 else
2795 return SNK_UNATTACHED;
ceeb1625 2796 } else if (port->port_type == TYPEC_PORT_SRC) {
f0690a25 2797 return SRC_UNATTACHED;
13cb492c
BJS		 2798 }
2799
2800 return SNK_UNATTACHED;
f0690a25
GR		 2801}
2802
2803static void tcpm_check_send_discover(struct tcpm_port *port)
2804{
2805 if (port->data_role == TYPEC_HOST && port->send_discover &&
2806 port->pd_capable) {
2807 tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0);
2808 port->send_discover = false;
2809 }
2810}
2811
2812static void tcpm_swap_complete(struct tcpm_port *port, int result)
2813{
2814 if (port->swap_pending) {
2815 port->swap_status = result;
2816 port->swap_pending = false;
b17dd571 2817 port->non_pd_role_swap = false;
f0690a25
GR		 2818 complete(&port->swap_complete);
2819 }
2820}
2821
53b70e5c 2822static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc)
fce042f0
BJS		 2823{
2824 switch (cc) {
2825 case TYPEC_CC_RP_1_5:
2826 return TYPEC_PWR_MODE_1_5A;
2827 case TYPEC_CC_RP_3_0:
2828 return TYPEC_PWR_MODE_3_0A;
2829 case TYPEC_CC_RP_DEF:
2830 default:
2831 return TYPEC_PWR_MODE_USB;
2832 }
2833}
2834
f0690a25
GR		 2835static void run_state_machine(struct tcpm_port *port)
2836{
2837 int ret;
fce042f0 2838 enum typec_pwr_opmode opmode;
131c7d12 2839 unsigned int msecs;
f0690a25
GR		 2840
2841 port->enter_state = port->state;
2842 switch (port->state) {
2843 case DRP_TOGGLING:
2844 break;
2845 /* SRC states */
2846 case SRC_UNATTACHED:
b17dd571
GR		 2847 if (!port->non_pd_role_swap)
2848 tcpm_swap_complete(port, -ENOTCONN);
f0690a25 2849 tcpm_src_detach(port);
8e04b372 2850 if (tcpm_start_drp_toggling(port, tcpm_rp_cc(port))) {
f0690a25
GR		 2851 tcpm_set_state(port, DRP_TOGGLING, 0);
2852 break;
2853 }
2854 tcpm_set_cc(port, tcpm_rp_cc(port));
9b0ae699 2855 if (port->port_type == TYPEC_PORT_DRP)
f0690a25
GR		 2856 tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK);
2857 break;
2858 case SRC_ATTACH_WAIT:
2859 if (tcpm_port_is_debug(port))
2860 tcpm_set_state(port, DEBUG_ACC_ATTACHED,
2861 PD_T_CC_DEBOUNCE);
2862 else if (tcpm_port_is_audio(port))
2863 tcpm_set_state(port, AUDIO_ACC_ATTACHED,
2864 PD_T_CC_DEBOUNCE);
2865 else if (tcpm_port_is_source(port))
2866 tcpm_set_state(port,
2867 tcpm_try_snk(port) ? SNK_TRY
2868 : SRC_ATTACHED,
2869 PD_T_CC_DEBOUNCE);
2870 break;
2871
2872 case SNK_TRY:
2873 port->try_snk_count++;
2874 /*
2875 * Requirements:
2876 * - Do not drive vconn or vbus
2877 * - Terminate CC pins (both) to Rd
2878 * Action:
2879 * - Wait for tDRPTry (PD_T_DRP_TRY).
2880 * Until then, ignore any state changes.
2881 */
2882 tcpm_set_cc(port, TYPEC_CC_RD);
2883 tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY);
2884 break;
2885 case SNK_TRY_WAIT:
a0a3e04e
BJS		 2886 if (tcpm_port_is_sink(port)) {
2887 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0);
2888 } else {
2889 tcpm_set_state(port, SRC_TRYWAIT, 0);
2890 port->max_wait = 0;
2891 }
2892 break;
2893 case SNK_TRY_WAIT_DEBOUNCE:
2894 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS,
2895 PD_T_PD_DEBOUNCE);
2896 break;
2897 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
f0690a25
GR		 2898 if (port->vbus_present && tcpm_port_is_sink(port)) {
2899 tcpm_set_state(port, SNK_ATTACHED, 0);
a0a3e04e
BJS		 2900 } else {
2901 tcpm_set_state(port, SRC_TRYWAIT, 0);
02d5be46 2902 port->max_wait = 0;
f0690a25 2903 }
f0690a25
GR		 2904 break;
2905 case SRC_TRYWAIT:
2906 tcpm_set_cc(port, tcpm_rp_cc(port));
02d5be46
BJS		 2907 if (port->max_wait == 0) {
2908 port->max_wait = jiffies +
2909 msecs_to_jiffies(PD_T_DRP_TRY);
f0690a25
GR		 2910 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
2911 PD_T_DRP_TRY);
02d5be46
BJS		 2912 } else {
2913 if (time_is_after_jiffies(port->max_wait))
2914 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
2915 jiffies_to_msecs(port->max_wait -
2916 jiffies));
2917 else
2918 tcpm_set_state(port, SNK_UNATTACHED, 0);
2919 }
2920 break;
2921 case SRC_TRYWAIT_DEBOUNCE:
2922 tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE);
f0690a25
GR		 2923 break;
2924 case SRC_TRYWAIT_UNATTACHED:
2925 tcpm_set_state(port, SNK_UNATTACHED, 0);
2926 break;
2927
2928 case SRC_ATTACHED:
2929 ret = tcpm_src_attach(port);
2930 tcpm_set_state(port, SRC_UNATTACHED,
2931 ret < 0 ? 0 : PD_T_PS_SOURCE_ON);
2932 break;
2933 case SRC_STARTUP:
fce042f0
BJS		 2934 opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port));
2935 typec_set_pwr_opmode(port->typec_port, opmode);
f0690a25
GR		 2936 port->pwr_opmode = TYPEC_PWR_MODE_USB;
2937 port->caps_count = 0;
2eadc33f 2938 port->negotiated_rev = PD_MAX_REV;
f0690a25 2939 port->message_id = 0;
5fec4b54 2940 port->rx_msgid = -1;
f0690a25
GR		 2941 port->explicit_contract = false;
2942 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
2943 break;
2944 case SRC_SEND_CAPABILITIES:
2945 port->caps_count++;
2946 if (port->caps_count > PD_N_CAPS_COUNT) {
2947 tcpm_set_state(port, SRC_READY, 0);
2948 break;
2949 }
2950 ret = tcpm_pd_send_source_caps(port);
2951 if (ret < 0) {
2952 tcpm_set_state(port, SRC_SEND_CAPABILITIES,
2953 PD_T_SEND_SOURCE_CAP);
2954 } else {
2955 /*
2956 * Per standard, we should clear the reset counter here.
2957 * However, that can result in state machine hang-ups.
2958 * Reset it only in READY state to improve stability.
2959 */
2960 /* port->hard_reset_count = 0; */
2961 port->caps_count = 0;
2962 port->pd_capable = true;
2963 tcpm_set_state_cond(port, hard_reset_state(port),
2964 PD_T_SEND_SOURCE_CAP);
2965 }
2966 break;
2967 case SRC_NEGOTIATE_CAPABILITIES:
2968 ret = tcpm_pd_check_request(port);
2969 if (ret < 0) {
2970 tcpm_pd_send_control(port, PD_CTRL_REJECT);
2971 if (!port->explicit_contract) {
2972 tcpm_set_state(port,
2973 SRC_WAIT_NEW_CAPABILITIES, 0);
2974 } else {
2975 tcpm_set_state(port, SRC_READY, 0);
2976 }
2977 } else {
2978 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
2979 tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
2980 PD_T_SRC_TRANSITION);
2981 }
2982 break;
2983 case SRC_TRANSITION_SUPPLY:
2984 /* XXX: regulator_set_voltage(vbus, ...) */
2985 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
2986 port->explicit_contract = true;
2987 typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD);
2988 port->pwr_opmode = TYPEC_PWR_MODE_PD;
2989 tcpm_set_state_cond(port, SRC_READY, 0);
2990 break;
2991 case SRC_READY:
2992#if 1
2993 port->hard_reset_count = 0;
2994#endif
2995 port->try_src_count = 0;
2996
3113bf1a 2997 tcpm_swap_complete(port, 0);
f0690a25 2998 tcpm_typec_connect(port);
2eadc33f 2999
f0690a25
GR		 3000 tcpm_check_send_discover(port);
3001 /*
3002 * 6.3.5
3003 * Sending ping messages is not necessary if
3004 * - the source operates at vSafe5V
3005 * or
3006 * - The system is not operating in PD mode
3007 * or
3008 * - Both partners are connected using a Type-C connector
f451ac9e
BJS		 3009 *
3010 * There is no actual need to send PD messages since the local
3011 * port type-c and the spec does not clearly say whether PD is
3012 * possible when type-c is connected to Type-A/B
f0690a25 3013 */
f0690a25
GR		 3014 break;
3015 case SRC_WAIT_NEW_CAPABILITIES:
3016 /* Nothing to do... */
3017 break;
3018
3019 /* SNK states */
3020 case SNK_UNATTACHED:
b17dd571
GR		 3021 if (!port->non_pd_role_swap)
3022 tcpm_swap_complete(port, -ENOTCONN);
2eadc33f 3023 tcpm_pps_complete(port, -ENOTCONN);
f0690a25 3024 tcpm_snk_detach(port);
8e04b372 3025 if (tcpm_start_drp_toggling(port, TYPEC_CC_RD)) {
f0690a25
GR		 3026 tcpm_set_state(port, DRP_TOGGLING, 0);
3027 break;
3028 }
3029 tcpm_set_cc(port, TYPEC_CC_RD);
9b0ae699 3030 if (port->port_type == TYPEC_PORT_DRP)
f0690a25
GR		 3031 tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC);
3032 break;
3033 case SNK_ATTACH_WAIT:
3034 if ((port->cc1 == TYPEC_CC_OPEN &&
3035 port->cc2 != TYPEC_CC_OPEN) ||
3036 (port->cc1 != TYPEC_CC_OPEN &&
3037 port->cc2 == TYPEC_CC_OPEN))
3038 tcpm_set_state(port, SNK_DEBOUNCED,
3039 PD_T_CC_DEBOUNCE);
3040 else if (tcpm_port_is_disconnected(port))
3041 tcpm_set_state(port, SNK_UNATTACHED,
3042 PD_T_PD_DEBOUNCE);
3043 break;
3044 case SNK_DEBOUNCED:
3045 if (tcpm_port_is_disconnected(port))
3046 tcpm_set_state(port, SNK_UNATTACHED,
3047 PD_T_PD_DEBOUNCE);
3048 else if (port->vbus_present)
3049 tcpm_set_state(port,
3050 tcpm_try_src(port) ? SRC_TRY
3051 : SNK_ATTACHED,
3052 0);
3053 else
3054 /* Wait for VBUS, but not forever */
56277035 3055 tcpm_set_state(port, PORT_RESET, PD_T_PS_SOURCE_ON);
f0690a25
GR		 3056 break;
3057
3058 case SRC_TRY:
3059 port->try_src_count++;
3060 tcpm_set_cc(port, tcpm_rp_cc(port));
131c7d12
BJS		 3061 port->max_wait = 0;
3062 tcpm_set_state(port, SRC_TRY_WAIT, 0);
3063 break;
3064 case SRC_TRY_WAIT:
3065 if (port->max_wait == 0) {
3066 port->max_wait = jiffies +
3067 msecs_to_jiffies(PD_T_DRP_TRY);
3068 msecs = PD_T_DRP_TRY;
3069 } else {
3070 if (time_is_after_jiffies(port->max_wait))
3071 msecs = jiffies_to_msecs(port->max_wait -
3072 jiffies);
3073 else
3074 msecs = 0;
3075 }
3076 tcpm_set_state(port, SNK_TRYWAIT, msecs);
f0690a25
GR		 3077 break;
3078 case SRC_TRY_DEBOUNCE:
3079 tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE);
3080 break;
3081 case SNK_TRYWAIT:
3082 tcpm_set_cc(port, TYPEC_CC_RD);
af450ebb 3083 tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE);
f0690a25 3084 break;
af450ebb
BJS		 3085 case SNK_TRYWAIT_VBUS:
3086 /*
3087 * TCPM stays in this state indefinitely until VBUS
3088 * is detected as long as Rp is not detected for
3089 * more than a time period of tPDDebounce.
3090 */
3091 if (port->vbus_present && tcpm_port_is_sink(port)) {
f0690a25
GR		 3092 tcpm_set_state(port, SNK_ATTACHED, 0);
3093 break;
3094 }
af450ebb
BJS		 3095 if (!tcpm_port_is_sink(port))
3096 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
f0690a25 3097 break;
af450ebb
BJS		 3098 case SNK_TRYWAIT_DEBOUNCE:
3099 tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE);
f0690a25 3100 break;
f0690a25
GR		 3101 case SNK_ATTACHED:
3102 ret = tcpm_snk_attach(port);
3103 if (ret < 0)
3104 tcpm_set_state(port, SNK_UNATTACHED, 0);
3105 else
3106 tcpm_set_state(port, SNK_STARTUP, 0);
3107 break;
3108 case SNK_STARTUP:
fce042f0
BJS		 3109 opmode = tcpm_get_pwr_opmode(port->polarity ?
3110 port->cc2 : port->cc1);
3111 typec_set_pwr_opmode(port->typec_port, opmode);
f0690a25 3112 port->pwr_opmode = TYPEC_PWR_MODE_USB;
2eadc33f 3113 port->negotiated_rev = PD_MAX_REV;
f0690a25 3114 port->message_id = 0;
5fec4b54 3115 port->rx_msgid = -1;
f0690a25
GR		 3116 port->explicit_contract = false;
3117 tcpm_set_state(port, SNK_DISCOVERY, 0);
3118 break;
3119 case SNK_DISCOVERY:
3120 if (port->vbus_present) {
3121 tcpm_set_current_limit(port,
3122 tcpm_get_current_limit(port),
3123 5000);
3124 tcpm_set_charge(port, true);
3125 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3126 break;
3127 }
3128 /*
3129 * For DRP, timeouts differ. Also, handling is supposed to be
3130 * different and much more complex (dead battery detection;
3131 * see USB power delivery specification, section 8.3.3.6.1.5.1).
3132 */
3133 tcpm_set_state(port, hard_reset_state(port),
9b0ae699 3134 port->port_type == TYPEC_PORT_DRP ?
f0690a25
GR		 3135 PD_T_DB_DETECT : PD_T_NO_RESPONSE);
3136 break;
3137 case SNK_DISCOVERY_DEBOUNCE:
3138 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE,
3139 PD_T_CC_DEBOUNCE);
3140 break;
3141 case SNK_DISCOVERY_DEBOUNCE_DONE:
3142 if (!tcpm_port_is_disconnected(port) &&
3143 tcpm_port_is_sink(port) &&
3144 time_is_after_jiffies(port->delayed_runtime)) {
3145 tcpm_set_state(port, SNK_DISCOVERY,
9578bcd0
DC		 3146 jiffies_to_msecs(port->delayed_runtime -
3147 jiffies));
f0690a25
GR		 3148 break;
3149 }
3150 tcpm_set_state(port, unattached_state(port), 0);
3151 break;
3152 case SNK_WAIT_CAPABILITIES:
3153 ret = port->tcpc->set_pd_rx(port->tcpc, true);
3154 if (ret < 0) {
3155 tcpm_set_state(port, SNK_READY, 0);
3156 break;
3157 }
3158 /*
3159 * If VBUS has never been low, and we time out waiting
3160 * for source cap, try a soft reset first, in case we
3161 * were already in a stable contract before this boot.
3162 * Do this only once.
3163 */
3164 if (port->vbus_never_low) {
3165 port->vbus_never_low = false;
3166 tcpm_set_state(port, SOFT_RESET_SEND,
3167 PD_T_SINK_WAIT_CAP);
3168 } else {
3169 tcpm_set_state(port, hard_reset_state(port),
3170 PD_T_SINK_WAIT_CAP);
3171 }
3172 break;
3173 case SNK_NEGOTIATE_CAPABILITIES:
3174 port->pd_capable = true;
3175 port->hard_reset_count = 0;
3176 ret = tcpm_pd_send_request(port);
3177 if (ret < 0) {
3178 /* Let the Source send capabilities again. */
3179 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3180 } else {
3181 tcpm_set_state_cond(port, hard_reset_state(port),
3182 PD_T_SENDER_RESPONSE);
3183 }
3184 break;
2eadc33f
AT		 3185 case SNK_NEGOTIATE_PPS_CAPABILITIES:
3186 ret = tcpm_pd_send_pps_request(port);
3187 if (ret < 0) {
3188 port->pps_status = ret;
3189 /*
3190 * If this was called due to updates to sink
3191 * capabilities, and pps is no longer valid, we should
3192 * safely fall back to a standard PDO.
3193 */
3194 if (port->update_sink_caps)
3195 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
3196 else
3197 tcpm_set_state(port, SNK_READY, 0);
3198 } else {
3199 tcpm_set_state_cond(port, hard_reset_state(port),
3200 PD_T_SENDER_RESPONSE);
3201 }
3202 break;
f0690a25
GR		 3203 case SNK_TRANSITION_SINK:
3204 case SNK_TRANSITION_SINK_VBUS:
3205 tcpm_set_state(port, hard_reset_state(port),
3206 PD_T_PS_TRANSITION);
3207 break;
3208 case SNK_READY:
3209 port->try_snk_count = 0;
2eadc33f 3210 port->update_sink_caps = false;
8bf05746
BJS		 3211 if (port->explicit_contract) {
3212 typec_set_pwr_opmode(port->typec_port,
3213 TYPEC_PWR_MODE_PD);
3214 port->pwr_opmode = TYPEC_PWR_MODE_PD;
3215 }
f0690a25 3216
3113bf1a 3217 tcpm_swap_complete(port, 0);
f0690a25 3218 tcpm_typec_connect(port);
f0690a25 3219 tcpm_check_send_discover(port);
2eadc33f
AT		 3220 tcpm_pps_complete(port, port->pps_status);
3221
f2a8aa05
AT		 3222 power_supply_changed(port->psy);
3223
f0690a25
GR		 3224 break;
3225
3226 /* Accessory states */
3227 case ACC_UNATTACHED:
3228 tcpm_acc_detach(port);
3229 tcpm_set_state(port, SRC_UNATTACHED, 0);
3230 break;
3231 case DEBUG_ACC_ATTACHED:
3232 case AUDIO_ACC_ATTACHED:
3233 ret = tcpm_acc_attach(port);
3234 if (ret < 0)
3235 tcpm_set_state(port, ACC_UNATTACHED, 0);
3236 break;
3237 case AUDIO_ACC_DEBOUNCE:
3238 tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE);
3239 break;
3240
3241 /* Hard_Reset states */
3242 case HARD_RESET_SEND:
3243 tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL);
3244 tcpm_set_state(port, HARD_RESET_START, 0);
3245 break;
3246 case HARD_RESET_START:
3247 port->hard_reset_count++;
3248 port->tcpc->set_pd_rx(port->tcpc, false);
3249 tcpm_unregister_altmodes(port);
3250 port->send_discover = true;
3251 if (port->pwr_role == TYPEC_SOURCE)
3252 tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF,
3253 PD_T_PS_HARD_RESET);
3254 else
3255 tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0);
3256 break;
3257 case SRC_HARD_RESET_VBUS_OFF:
3258 tcpm_set_vconn(port, true);
3259 tcpm_set_vbus(port, false);
23b5f732
BJS		 3260 tcpm_set_roles(port, port->self_powered, TYPEC_SOURCE,
3261 TYPEC_HOST);
f0690a25
GR		 3262 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
3263 break;
3264 case SRC_HARD_RESET_VBUS_ON:
3265 tcpm_set_vbus(port, true);
3266 port->tcpc->set_pd_rx(port->tcpc, true);
3267 tcpm_set_attached_state(port, true);
3268 tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON);
3269 break;
3270 case SNK_HARD_RESET_SINK_OFF:
2eadc33f 3271 memset(&port->pps_data, 0, sizeof(port->pps_data));
f0690a25 3272 tcpm_set_vconn(port, false);
157c0f2f
BJS		 3273 if (port->pd_capable)
3274 tcpm_set_charge(port, false);
23b5f732
BJS		 3275 tcpm_set_roles(port, port->self_powered, TYPEC_SINK,
3276 TYPEC_DEVICE);
f0690a25
GR		 3277 /*
3278 * VBUS may or may not toggle, depending on the adapter.
3279 * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON
3280 * directly after timeout.
3281 */
3282 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V);
3283 break;
3284 case SNK_HARD_RESET_WAIT_VBUS:
3285 /* Assume we're disconnected if VBUS doesn't come back. */
3286 tcpm_set_state(port, SNK_UNATTACHED,
3287 PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON);
3288 break;
3289 case SNK_HARD_RESET_SINK_ON:
3290 /* Note: There is no guarantee that VBUS is on in this state */
3291 /*
3292 * XXX:
3293 * The specification suggests that dual mode ports in sink
3294 * mode should transition to state PE_SRC_Transition_to_default.
3295 * See USB power delivery specification chapter 8.3.3.6.1.3.
3296 * This would mean to to
3297 * - turn off VCONN, reset power supply
3298 * - request hardware reset
3299 * - turn on VCONN
3300 * - Transition to state PE_Src_Startup
3301 * SNK only ports shall transition to state Snk_Startup
3302 * (see chapter 8.3.3.3.8).
3303 * Similar, dual-mode ports in source mode should transition
3304 * to PE_SNK_Transition_to_default.
3305 */
157c0f2f
BJS		 3306 if (port->pd_capable) {
3307 tcpm_set_current_limit(port,
3308 tcpm_get_current_limit(port),
3309 5000);
3310 tcpm_set_charge(port, true);
3311 }
f0690a25
GR		 3312 tcpm_set_attached_state(port, true);
3313 tcpm_set_state(port, SNK_STARTUP, 0);
3314 break;
3315
3316 /* Soft_Reset states */
3317 case SOFT_RESET:
3318 port->message_id = 0;
5fec4b54 3319 port->rx_msgid = -1;
f0690a25
GR		 3320 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3321 if (port->pwr_role == TYPEC_SOURCE)
3322 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
3323 else
3324 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3325 break;
3326 case SOFT_RESET_SEND:
3327 port->message_id = 0;
5fec4b54 3328 port->rx_msgid = -1;
f0690a25
GR		 3329 if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET))
3330 tcpm_set_state_cond(port, hard_reset_state(port), 0);
3331 else
3332 tcpm_set_state_cond(port, hard_reset_state(port),
3333 PD_T_SENDER_RESPONSE);
3334 break;
3335
3336 /* DR_Swap states */
3337 case DR_SWAP_SEND:
3338 tcpm_pd_send_control(port, PD_CTRL_DR_SWAP);
3339 tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT,
3340 PD_T_SENDER_RESPONSE);
3341 break;
3342 case DR_SWAP_ACCEPT:
3343 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3344 tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0);
3345 break;
3346 case DR_SWAP_SEND_TIMEOUT:
3347 tcpm_swap_complete(port, -ETIMEDOUT);
3348 tcpm_set_state(port, ready_state(port), 0);
3349 break;
3350 case DR_SWAP_CHANGE_DR:
3351 if (port->data_role == TYPEC_HOST) {
3352 tcpm_unregister_altmodes(port);
3353 tcpm_set_roles(port, true, port->pwr_role,
3354 TYPEC_DEVICE);
3355 } else {
3356 tcpm_set_roles(port, true, port->pwr_role,
3357 TYPEC_HOST);
3358 port->send_discover = true;
3359 }
f0690a25
GR		 3360 tcpm_set_state(port, ready_state(port), 0);
3361 break;
3362
3363 /* PR_Swap states */
3364 case PR_SWAP_ACCEPT:
3365 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3366 tcpm_set_state(port, PR_SWAP_START, 0);
3367 break;
3368 case PR_SWAP_SEND:
3369 tcpm_pd_send_control(port, PD_CTRL_PR_SWAP);
3370 tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT,
3371 PD_T_SENDER_RESPONSE);
3372 break;
3373 case PR_SWAP_SEND_TIMEOUT:
3374 tcpm_swap_complete(port, -ETIMEDOUT);
3375 tcpm_set_state(port, ready_state(port), 0);
3376 break;
3377 case PR_SWAP_START:
3378 if (port->pwr_role == TYPEC_SOURCE)
3379 tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF,
3380 PD_T_SRC_TRANSITION);
3381 else
3382 tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0);
3383 break;
3384 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3385 tcpm_set_vbus(port, false);
3386 port->explicit_contract = false;
b965b631 3387 /* allow time for Vbus discharge, must be < tSrcSwapStdby */
f0690a25 3388 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF,
b965b631 3389 PD_T_SRCSWAPSTDBY);
f0690a25
GR		 3390 break;
3391 case PR_SWAP_SRC_SNK_SOURCE_OFF:
3392 tcpm_set_cc(port, TYPEC_CC_RD);
b965b631
BJS		 3393 /* allow CC debounce */
3394 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED,
3395 PD_T_CC_DEBOUNCE);
3396 break;
3397 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
050161ea
GR		 3398 /*
3399 * USB-PD standard, 6.2.1.4, Port Power Role:
3400 * "During the Power Role Swap Sequence, for the initial Source
3401 * Port, the Port Power Role field shall be set to Sink in the
3402 * PS_RDY Message indicating that the initial Source’s power
3403 * supply is turned off"
3404 */
3405 tcpm_set_pwr_role(port, TYPEC_SINK);
f0690a25
GR		 3406 if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
3407 tcpm_set_state(port, ERROR_RECOVERY, 0);
3408 break;
3409 }
3410 tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON);
3411 break;
3412 case PR_SWAP_SRC_SNK_SINK_ON:
f0690a25
GR		 3413 tcpm_set_state(port, SNK_STARTUP, 0);
3414 break;
3415 case PR_SWAP_SNK_SRC_SINK_OFF:
3416 tcpm_set_charge(port, false);
3417 tcpm_set_state(port, hard_reset_state(port),
3418 PD_T_PS_SOURCE_OFF);
3419 break;
3420 case PR_SWAP_SNK_SRC_SOURCE_ON:
3421 tcpm_set_cc(port, tcpm_rp_cc(port));
3422 tcpm_set_vbus(port, true);
b965b631
BJS		 3423 /*
3424 * allow time VBUS ramp-up, must be < tNewSrc
3425 * Also, this window overlaps with CC debounce as well.
3426 * So, Wait for the max of two which is PD_T_NEWSRC
3427 */
3428 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP,
3429 PD_T_NEWSRC);
3430 break;
3431 case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP:
050161ea
GR		 3432 /*
3433 * USB PD standard, 6.2.1.4:
3434 * "Subsequent Messages initiated by the Policy Engine,
3435 * such as the PS_RDY Message sent to indicate that Vbus
3436 * is ready, will have the Port Power Role field set to
3437 * Source."
3438 */
f0690a25 3439 tcpm_set_pwr_role(port, TYPEC_SOURCE);
050161ea 3440 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
f0690a25
GR		 3441 tcpm_set_state(port, SRC_STARTUP, 0);
3442 break;
3443
3444 case VCONN_SWAP_ACCEPT:
3445 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3446 tcpm_set_state(port, VCONN_SWAP_START, 0);
3447 break;
3448 case VCONN_SWAP_SEND:
3449 tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP);
3450 tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT,
3451 PD_T_SENDER_RESPONSE);
3452 break;
3453 case VCONN_SWAP_SEND_TIMEOUT:
3454 tcpm_swap_complete(port, -ETIMEDOUT);
3455 tcpm_set_state(port, ready_state(port), 0);
3456 break;
3457 case VCONN_SWAP_START:
3458 if (port->vconn_role == TYPEC_SOURCE)
3459 tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0);
3460 else
3461 tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0);
3462 break;
3463 case VCONN_SWAP_WAIT_FOR_VCONN:
3464 tcpm_set_state(port, hard_reset_state(port),
3465 PD_T_VCONN_SOURCE_ON);
3466 break;
3467 case VCONN_SWAP_TURN_ON_VCONN:
3468 tcpm_set_vconn(port, true);
3469 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
f0690a25
GR		 3470 tcpm_set_state(port, ready_state(port), 0);
3471 break;
3472 case VCONN_SWAP_TURN_OFF_VCONN:
3473 tcpm_set_vconn(port, false);
f0690a25
GR		 3474 tcpm_set_state(port, ready_state(port), 0);
3475 break;
3476
3477 case DR_SWAP_CANCEL:
3478 case PR_SWAP_CANCEL:
3479 case VCONN_SWAP_CANCEL:
3480 tcpm_swap_complete(port, port->swap_status);
3481 if (port->pwr_role == TYPEC_SOURCE)
3482 tcpm_set_state(port, SRC_READY, 0);
3483 else
3484 tcpm_set_state(port, SNK_READY, 0);
3485 break;
3486
3487 case BIST_RX:
3488 switch (BDO_MODE_MASK(port->bist_request)) {
3489 case BDO_MODE_CARRIER2:
3490 tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
3491 break;
3492 default:
3493 break;
3494 }
3495 /* Always switch to unattached state */
3496 tcpm_set_state(port, unattached_state(port), 0);
3497 break;
64f7c494
AT		 3498 case GET_STATUS_SEND:
3499 tcpm_pd_send_control(port, PD_CTRL_GET_STATUS);
3500 tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT,
3501 PD_T_SENDER_RESPONSE);
3502 break;
3503 case GET_STATUS_SEND_TIMEOUT:
3504 tcpm_set_state(port, ready_state(port), 0);
3505 break;
3506 case GET_PPS_STATUS_SEND:
3507 tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS);
3508 tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT,
3509 PD_T_SENDER_RESPONSE);
3510 break;
3511 case GET_PPS_STATUS_SEND_TIMEOUT:
3512 tcpm_set_state(port, ready_state(port), 0);
3513 break;
f0690a25
GR		 3514 case ERROR_RECOVERY:
3515 tcpm_swap_complete(port, -EPROTO);
2eadc33f 3516 tcpm_pps_complete(port, -EPROTO);
b17dd571
GR		 3517 tcpm_set_state(port, PORT_RESET, 0);
3518 break;
3519 case PORT_RESET:
f0690a25 3520 tcpm_reset_port(port);
f0690a25 3521 tcpm_set_cc(port, TYPEC_CC_OPEN);
b17dd571 3522 tcpm_set_state(port, PORT_RESET_WAIT_OFF,
f0690a25
GR		 3523 PD_T_ERROR_RECOVERY);
3524 break;
b17dd571 3525 case PORT_RESET_WAIT_OFF:
f0690a25
GR		 3526 tcpm_set_state(port,
3527 tcpm_default_state(port),
3528 port->vbus_present ? PD_T_PS_SOURCE_OFF : 0);
3529 break;
3530 default:
3531 WARN(1, "Unexpected port state %d\n", port->state);
3532 break;
3533 }
3534}
3535
3536static void tcpm_state_machine_work(struct work_struct *work)
3537{
3538 struct tcpm_port *port = container_of(work, struct tcpm_port,
3539 state_machine.work);
3540 enum tcpm_state prev_state;
3541
3542 mutex_lock(&port->lock);
3543 port->state_machine_running = true;
3544
3545 if (port->queued_message && tcpm_send_queued_message(port))
3546 goto done;
3547
3548 /* If we were queued due to a delayed state change, update it now */
3549 if (port->delayed_state) {
3550 tcpm_log(port, "state change %s -> %s [delayed %ld ms]",
3551 tcpm_states[port->state],
3552 tcpm_states[port->delayed_state], port->delay_ms);
3553 port->prev_state = port->state;
3554 port->state = port->delayed_state;
3555 port->delayed_state = INVALID_STATE;
3556 }
3557
3558 /*
3559 * Continue running as long as we have (non-delayed) state changes
3560 * to make.
3561 */
3562 do {
3563 prev_state = port->state;
3564 run_state_machine(port);
3565 if (port->queued_message)
3566 tcpm_send_queued_message(port);
3567 } while (port->state != prev_state && !port->delayed_state);
3568
3569done:
3570 port->state_machine_running = false;
3571 mutex_unlock(&port->lock);
3572}
3573
3574static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
3575 enum typec_cc_status cc2)
3576{
3577 enum typec_cc_status old_cc1, old_cc2;
3578 enum tcpm_state new_state;
3579
3580 old_cc1 = port->cc1;
3581 old_cc2 = port->cc2;
3582 port->cc1 = cc1;
3583 port->cc2 = cc2;
3584
3585 tcpm_log_force(port,
3586 "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]",
3587 old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state],
3588 port->polarity,
3589 tcpm_port_is_disconnected(port) ? "disconnected"
3590 : "connected");
3591
3592 switch (port->state) {
3593 case DRP_TOGGLING:
3594 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
3595 tcpm_port_is_source(port))
3596 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3597 else if (tcpm_port_is_sink(port))
3598 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3599 break;
3600 case SRC_UNATTACHED:
3601 case ACC_UNATTACHED:
3602 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
3603 tcpm_port_is_source(port))
3604 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3605 break;
3606 case SRC_ATTACH_WAIT:
3607 if (tcpm_port_is_disconnected(port) ||
3608 tcpm_port_is_audio_detached(port))
3609 tcpm_set_state(port, SRC_UNATTACHED, 0);
3610 else if (cc1 != old_cc1 || cc2 != old_cc2)
3611 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3612 break;
3613 case SRC_ATTACHED:
f3b73364
BJS		 3614 case SRC_SEND_CAPABILITIES:
3615 case SRC_READY:
3616 if (tcpm_port_is_disconnected(port) ||
3617 !tcpm_port_is_source(port))
f0690a25
GR		 3618 tcpm_set_state(port, SRC_UNATTACHED, 0);
3619 break;
f0690a25
GR		 3620 case SNK_UNATTACHED:
3621 if (tcpm_port_is_sink(port))
3622 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3623 break;
3624 case SNK_ATTACH_WAIT:
3625 if ((port->cc1 == TYPEC_CC_OPEN &&
3626 port->cc2 != TYPEC_CC_OPEN) ||
3627 (port->cc1 != TYPEC_CC_OPEN &&
3628 port->cc2 == TYPEC_CC_OPEN))
3629 new_state = SNK_DEBOUNCED;
3630 else if (tcpm_port_is_disconnected(port))
3631 new_state = SNK_UNATTACHED;
3632 else
3633 break;
3634 if (new_state != port->delayed_state)
3635 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3636 break;
3637 case SNK_DEBOUNCED:
3638 if (tcpm_port_is_disconnected(port))
3639 new_state = SNK_UNATTACHED;
3640 else if (port->vbus_present)
3641 new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED;
3642 else
3643 new_state = SNK_UNATTACHED;
3644 if (new_state != port->delayed_state)
3645 tcpm_set_state(port, SNK_DEBOUNCED, 0);
3646 break;
3647 case SNK_READY:
3648 if (tcpm_port_is_disconnected(port))
3649 tcpm_set_state(port, unattached_state(port), 0);
3650 else if (!port->pd_capable &&
3651 (cc1 != old_cc1 || cc2 != old_cc2))
3652 tcpm_set_current_limit(port,
3653 tcpm_get_current_limit(port),
3654 5000);
3655 break;
3656
3657 case AUDIO_ACC_ATTACHED:
3658 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
3659 tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0);
3660 break;
3661 case AUDIO_ACC_DEBOUNCE:
3662 if (tcpm_port_is_audio(port))
3663 tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0);
3664 break;
3665
3666 case DEBUG_ACC_ATTACHED:
3667 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
3668 tcpm_set_state(port, ACC_UNATTACHED, 0);
3669 break;
3670
3671 case SNK_TRY:
3672 /* Do nothing, waiting for timeout */
3673 break;
3674
3675 case SNK_DISCOVERY:
3676 /* CC line is unstable, wait for debounce */
3677 if (tcpm_port_is_disconnected(port))
3678 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0);
3679 break;
3680 case SNK_DISCOVERY_DEBOUNCE:
3681 break;
3682
3683 case SRC_TRYWAIT:
3684 /* Hand over to state machine if needed */
3685 if (!port->vbus_present && tcpm_port_is_source(port))
02d5be46
BJS		 3686 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
3687 break;
3688 case SRC_TRYWAIT_DEBOUNCE:
3689 if (port->vbus_present || !tcpm_port_is_source(port))
f0690a25
GR		 3690 tcpm_set_state(port, SRC_TRYWAIT, 0);
3691 break;
a0a3e04e
BJS		 3692 case SNK_TRY_WAIT_DEBOUNCE:
3693 if (!tcpm_port_is_sink(port)) {
3694 port->max_wait = 0;
3695 tcpm_set_state(port, SRC_TRYWAIT, 0);
f0690a25 3696 }
f0690a25 3697 break;
131c7d12 3698 case SRC_TRY_WAIT:
c79d92bd
BJS		 3699 if (tcpm_port_is_source(port))
3700 tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0);
f0690a25
GR		 3701 break;
3702 case SRC_TRY_DEBOUNCE:
131c7d12 3703 tcpm_set_state(port, SRC_TRY_WAIT, 0);
f0690a25
GR		 3704 break;
3705 case SNK_TRYWAIT_DEBOUNCE:
af450ebb
BJS		 3706 if (tcpm_port_is_sink(port))
3707 tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0);
3708 break;
3709 case SNK_TRYWAIT_VBUS:
3710 if (!tcpm_port_is_sink(port))
f0690a25
GR		 3711 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
3712 break;
af450ebb
BJS		 3713 case SNK_TRYWAIT:
3714 /* Do nothing, waiting for tCCDebounce */
3715 break;
f0690a25
GR		 3716 case PR_SWAP_SNK_SRC_SINK_OFF:
3717 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3718 case PR_SWAP_SRC_SNK_SOURCE_OFF:
b965b631
BJS		 3719 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
3720 case PR_SWAP_SNK_SRC_SOURCE_ON:
f0690a25 3721 /*
b965b631 3722 * CC state change is expected in PR_SWAP
f0690a25
GR		 3723 * Ignore it.
3724 */
3725 break;
3726
3727 default:
3728 if (tcpm_port_is_disconnected(port))
3729 tcpm_set_state(port, unattached_state(port), 0);
3730 break;
3731 }
3732}
3733
3734static void _tcpm_pd_vbus_on(struct tcpm_port *port)
3735{
f0690a25
GR		 3736 tcpm_log_force(port, "VBUS on");
3737 port->vbus_present = true;
3738 switch (port->state) {
3739 case SNK_TRANSITION_SINK_VBUS:
8bf05746 3740 port->explicit_contract = true;
f0690a25
GR		 3741 tcpm_set_state(port, SNK_READY, 0);
3742 break;
3743 case SNK_DISCOVERY:
3744 tcpm_set_state(port, SNK_DISCOVERY, 0);
3745 break;
3746
3747 case SNK_DEBOUNCED:
3748 tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY
3749 : SNK_ATTACHED,
3750 0);
3751 break;
3752 case SNK_HARD_RESET_WAIT_VBUS:
3753 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0);
3754 break;
3755 case SRC_ATTACHED:
3756 tcpm_set_state(port, SRC_STARTUP, 0);
3757 break;
3758 case SRC_HARD_RESET_VBUS_ON:
3759 tcpm_set_state(port, SRC_STARTUP, 0);
3760 break;
3761
3762 case SNK_TRY:
3763 /* Do nothing, waiting for timeout */
3764 break;
3765 case SRC_TRYWAIT:
02d5be46
BJS		 3766 /* Do nothing, Waiting for Rd to be detected */
3767 break;
3768 case SRC_TRYWAIT_DEBOUNCE:
3769 tcpm_set_state(port, SRC_TRYWAIT, 0);
f0690a25 3770 break;
a0a3e04e
BJS		 3771 case SNK_TRY_WAIT_DEBOUNCE:
3772 /* Do nothing, waiting for PD_DEBOUNCE to do be done */
f0690a25
GR		 3773 break;
3774 case SNK_TRYWAIT:
af450ebb
BJS		 3775 /* Do nothing, waiting for tCCDebounce */
3776 break;
3777 case SNK_TRYWAIT_VBUS:
3778 if (tcpm_port_is_sink(port))
3779 tcpm_set_state(port, SNK_ATTACHED, 0);
3780 break;
3781 case SNK_TRYWAIT_DEBOUNCE:
3782 /* Do nothing, waiting for Rp */
f0690a25 3783 break;
131c7d12
BJS		 3784 case SRC_TRY_WAIT:
3785 case SRC_TRY_DEBOUNCE:
3786 /* Do nothing, waiting for sink detection */
3787 break;
f0690a25
GR		 3788 default:
3789 break;
3790 }
3791}
3792
3793static void _tcpm_pd_vbus_off(struct tcpm_port *port)
3794{
f0690a25
GR		 3795 tcpm_log_force(port, "VBUS off");
3796 port->vbus_present = false;
3797 port->vbus_never_low = false;
3798 switch (port->state) {
3799 case SNK_HARD_RESET_SINK_OFF:
3800 tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0);
3801 break;
3802 case SRC_HARD_RESET_VBUS_OFF:
3803 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, 0);
3804 break;
3805 case HARD_RESET_SEND:
3806 break;
3807
3808 case SNK_TRY:
3809 /* Do nothing, waiting for timeout */
3810 break;
3811 case SRC_TRYWAIT:
3812 /* Hand over to state machine if needed */
3813 if (tcpm_port_is_source(port))
02d5be46 3814 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
f0690a25 3815 break;
a0a3e04e
BJS		 3816 case SNK_TRY_WAIT_DEBOUNCE:
3817 /* Do nothing, waiting for PD_DEBOUNCE to do be done */
f0690a25 3818 break;
af450ebb 3819 case SNK_TRYWAIT:
f0690a25 3820 case SNK_TRYWAIT_VBUS:
af450ebb 3821 case SNK_TRYWAIT_DEBOUNCE:
f0690a25 3822 break;
f0690a25
GR		 3823 case SNK_ATTACH_WAIT:
3824 tcpm_set_state(port, SNK_UNATTACHED, 0);
3825 break;
3826
3827 case SNK_NEGOTIATE_CAPABILITIES:
3828 break;
3829
3830 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3831 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0);
3832 break;
3833
3834 case PR_SWAP_SNK_SRC_SINK_OFF:
3835 /* Do nothing, expected */
3836 break;
3837
b17dd571 3838 case PORT_RESET_WAIT_OFF:
c749d4d0 3839 tcpm_set_state(port, tcpm_default_state(port), 0);
f0690a25 3840 break;
131c7d12
BJS		 3841 case SRC_TRY_WAIT:
3842 case SRC_TRY_DEBOUNCE:
3843 /* Do nothing, waiting for sink detection */
3844 break;
f0690a25
GR		 3845 default:
3846 if (port->pwr_role == TYPEC_SINK &&
3847 port->attached)
3848 tcpm_set_state(port, SNK_UNATTACHED, 0);
3849 break;
3850 }
3851}
3852
3853static void _tcpm_pd_hard_reset(struct tcpm_port *port)
3854{
3855 tcpm_log_force(port, "Received hard reset");
3856 /*
3857 * If we keep receiving hard reset requests, executing the hard reset
3858 * must have failed. Revert to error recovery if that happens.
3859 */
3860 tcpm_set_state(port,
3861 port->hard_reset_count < PD_N_HARD_RESET_COUNT ?
3862 HARD_RESET_START : ERROR_RECOVERY,
3863 0);
3864}
3865
3866static void tcpm_pd_event_handler(struct work_struct *work)
3867{
3868 struct tcpm_port *port = container_of(work, struct tcpm_port,
3869 event_work);
3870 u32 events;
3871
3872 mutex_lock(&port->lock);
3873
3874 spin_lock(&port->pd_event_lock);
3875 while (port->pd_events) {
3876 events = port->pd_events;
3877 port->pd_events = 0;
3878 spin_unlock(&port->pd_event_lock);
3879 if (events & TCPM_RESET_EVENT)
3880 _tcpm_pd_hard_reset(port);
3881 if (events & TCPM_VBUS_EVENT) {
3882 bool vbus;
3883
3884 vbus = port->tcpc->get_vbus(port->tcpc);
3885 if (vbus)
3886 _tcpm_pd_vbus_on(port);
3887 else
3888 _tcpm_pd_vbus_off(port);
3889 }
3890 if (events & TCPM_CC_EVENT) {
3891 enum typec_cc_status cc1, cc2;
3892
3893 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
3894 _tcpm_cc_change(port, cc1, cc2);
3895 }
3896 spin_lock(&port->pd_event_lock);
3897 }
3898 spin_unlock(&port->pd_event_lock);
3899 mutex_unlock(&port->lock);
3900}
3901
3902void tcpm_cc_change(struct tcpm_port *port)
3903{
3904 spin_lock(&port->pd_event_lock);
3905 port->pd_events |= TCPM_CC_EVENT;
3906 spin_unlock(&port->pd_event_lock);
3907 queue_work(port->wq, &port->event_work);
3908}
3909EXPORT_SYMBOL_GPL(tcpm_cc_change);
3910
3911void tcpm_vbus_change(struct tcpm_port *port)
3912{
3913 spin_lock(&port->pd_event_lock);
3914 port->pd_events |= TCPM_VBUS_EVENT;
3915 spin_unlock(&port->pd_event_lock);
3916 queue_work(port->wq, &port->event_work);
3917}
3918EXPORT_SYMBOL_GPL(tcpm_vbus_change);
3919
3920void tcpm_pd_hard_reset(struct tcpm_port *port)
3921{
3922 spin_lock(&port->pd_event_lock);
3923 port->pd_events = TCPM_RESET_EVENT;
3924 spin_unlock(&port->pd_event_lock);
3925 queue_work(port->wq, &port->event_work);
3926}
3927EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
3928
3929static int tcpm_dr_set(const struct typec_capability *cap,
3930 enum typec_data_role data)
3931{
3932 struct tcpm_port *port = typec_cap_to_tcpm(cap);
3933 int ret;
3934
3935 mutex_lock(&port->swap_lock);
3936 mutex_lock(&port->lock);
3937
9b0ae699 3938 if (port->port_type != TYPEC_PORT_DRP) {
f0690a25
GR		 3939 ret = -EINVAL;
3940 goto port_unlock;
3941 }
3942 if (port->state != SRC_READY && port->state != SNK_READY) {
3943 ret = -EAGAIN;
3944 goto port_unlock;
3945 }
3946
3947 if (port->data_role == data) {
3948 ret = 0;
3949 goto port_unlock;
3950 }
3951
3952 /*
3953 * XXX
3954 * 6.3.9: If an alternate mode is active, a request to swap
3955 * alternate modes shall trigger a port reset.
3956 * Reject data role swap request in this case.
3957 */
3958
b17dd571
GR		 3959 if (!port->pd_capable) {
3960 /*
3961 * If the partner is not PD capable, reset the port to
3962 * trigger a role change. This can only work if a preferred
3963 * role is configured, and if it matches the requested role.
3964 */
3965 if (port->try_role == TYPEC_NO_PREFERRED_ROLE ||
3966 port->try_role == port->pwr_role) {
3967 ret = -EINVAL;
3968 goto port_unlock;
3969 }
3970 port->non_pd_role_swap = true;
3971 tcpm_set_state(port, PORT_RESET, 0);
3972 } else {
3973 tcpm_set_state(port, DR_SWAP_SEND, 0);
3974 }
3975
f0690a25
GR		 3976 port->swap_status = 0;
3977 port->swap_pending = true;
3978 reinit_completion(&port->swap_complete);
f0690a25
GR		 3979 mutex_unlock(&port->lock);
3980
9adf9f9e
GR		 3981 if (!wait_for_completion_timeout(&port->swap_complete,
3982 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
3983 ret = -ETIMEDOUT;
3984 else
3985 ret = port->swap_status;
f0690a25 3986
b17dd571 3987 port->non_pd_role_swap = false;
f0690a25
GR		 3988 goto swap_unlock;
3989
3990port_unlock:
3991 mutex_unlock(&port->lock);
3992swap_unlock:
3993 mutex_unlock(&port->swap_lock);
3994 return ret;
3995}
3996
3997static int tcpm_pr_set(const struct typec_capability *cap,
3998 enum typec_role role)
3999{
4000 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4001 int ret;
4002
4003 mutex_lock(&port->swap_lock);
4004 mutex_lock(&port->lock);
4005
9b0ae699 4006 if (port->port_type != TYPEC_PORT_DRP) {
f0690a25
GR		 4007 ret = -EINVAL;
4008 goto port_unlock;
4009 }
4010 if (port->state != SRC_READY && port->state != SNK_READY) {
4011 ret = -EAGAIN;
4012 goto port_unlock;
4013 }
4014
4015 if (role == port->pwr_role) {
4016 ret = 0;
4017 goto port_unlock;
4018 }
4019
f0690a25
GR		 4020 port->swap_status = 0;
4021 port->swap_pending = true;
4022 reinit_completion(&port->swap_complete);
4023 tcpm_set_state(port, PR_SWAP_SEND, 0);
4024 mutex_unlock(&port->lock);
4025
9adf9f9e
GR		 4026 if (!wait_for_completion_timeout(&port->swap_complete,
4027 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4028 ret = -ETIMEDOUT;
4029 else
4030 ret = port->swap_status;
f0690a25 4031
f0690a25
GR		 4032 goto swap_unlock;
4033
4034port_unlock:
4035 mutex_unlock(&port->lock);
4036swap_unlock:
4037 mutex_unlock(&port->swap_lock);
4038 return ret;
4039}
4040
4041static int tcpm_vconn_set(const struct typec_capability *cap,
4042 enum typec_role role)
4043{
4044 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4045 int ret;
4046
4047 mutex_lock(&port->swap_lock);
4048 mutex_lock(&port->lock);
4049
4050 if (port->state != SRC_READY && port->state != SNK_READY) {
4051 ret = -EAGAIN;
4052 goto port_unlock;
4053 }
4054
4055 if (role == port->vconn_role) {
4056 ret = 0;
4057 goto port_unlock;
4058 }
4059
4060 port->swap_status = 0;
4061 port->swap_pending = true;
4062 reinit_completion(&port->swap_complete);
4063 tcpm_set_state(port, VCONN_SWAP_SEND, 0);
4064 mutex_unlock(&port->lock);
4065
9adf9f9e
GR		 4066 if (!wait_for_completion_timeout(&port->swap_complete,
4067 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4068 ret = -ETIMEDOUT;
4069 else
4070 ret = port->swap_status;
f0690a25 4071
f0690a25
GR		 4072 goto swap_unlock;
4073
4074port_unlock:
4075 mutex_unlock(&port->lock);
4076swap_unlock:
4077 mutex_unlock(&port->swap_lock);
4078 return ret;
4079}
4080
4081static int tcpm_try_role(const struct typec_capability *cap, int role)
4082{
4083 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4084 struct tcpc_dev *tcpc = port->tcpc;
4085 int ret = 0;
4086
4087 mutex_lock(&port->lock);
4088 if (tcpc->try_role)
4089 ret = tcpc->try_role(tcpc, role);
4090 if (!ret && !tcpc->config->try_role_hw)
4091 port->try_role = role;
4092 port->try_src_count = 0;
4093 port->try_snk_count = 0;
4094 mutex_unlock(&port->lock);
4095
4096 return ret;
4097}
4098
f2a8aa05 4099static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr)
2eadc33f
AT		 4100{
4101 unsigned int target_mw;
4102 int ret;
4103
4104 mutex_lock(&port->swap_lock);
4105 mutex_lock(&port->lock);
4106
4107 if (!port->pps_data.active) {
4108 ret = -EOPNOTSUPP;
4109 goto port_unlock;
4110 }
4111
4112 if (port->state != SNK_READY) {
4113 ret = -EAGAIN;
4114 goto port_unlock;
4115 }
4116
4117 if (op_curr > port->pps_data.max_curr) {
4118 ret = -EINVAL;
4119 goto port_unlock;
4120 }
4121
4122 target_mw = (op_curr * port->pps_data.out_volt) / 1000;
4123 if (target_mw < port->operating_snk_mw) {
4124 ret = -EINVAL;
4125 goto port_unlock;
4126 }
4127
554fab6d
AT		 4128 /* Round down operating current to align with PPS valid steps */
4129 op_curr = op_curr - (op_curr % RDO_PROG_CURR_MA_STEP);
4130
2eadc33f
AT		 4131 reinit_completion(&port->pps_complete);
4132 port->pps_data.op_curr = op_curr;
4133 port->pps_status = 0;
4134 port->pps_pending = true;
4135 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4136 mutex_unlock(&port->lock);
4137
4138 if (!wait_for_completion_timeout(&port->pps_complete,
4139 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4140 ret = -ETIMEDOUT;
4141 else
4142 ret = port->pps_status;
4143
4144 goto swap_unlock;
4145
4146port_unlock:
4147 mutex_unlock(&port->lock);
4148swap_unlock:
4149 mutex_unlock(&port->swap_lock);
4150
4151 return ret;
4152}
4153
f2a8aa05 4154static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt)
2eadc33f
AT		 4155{
4156 unsigned int target_mw;
4157 int ret;
4158
4159 mutex_lock(&port->swap_lock);
4160 mutex_lock(&port->lock);
4161
4162 if (!port->pps_data.active) {
4163 ret = -EOPNOTSUPP;
4164 goto port_unlock;
4165 }
4166
4167 if (port->state != SNK_READY) {
4168 ret = -EAGAIN;
4169 goto port_unlock;
4170 }
4171
4172 if (out_volt < port->pps_data.min_volt ||
4173 out_volt > port->pps_data.max_volt) {
4174 ret = -EINVAL;
4175 goto port_unlock;
4176 }
4177
4178 target_mw = (port->pps_data.op_curr * out_volt) / 1000;
4179 if (target_mw < port->operating_snk_mw) {
4180 ret = -EINVAL;
4181 goto port_unlock;
4182 }
4183
554fab6d
AT		 4184 /* Round down output voltage to align with PPS valid steps */
4185 out_volt = out_volt - (out_volt % RDO_PROG_VOLT_MV_STEP);
4186
2eadc33f
AT		 4187 reinit_completion(&port->pps_complete);
4188 port->pps_data.out_volt = out_volt;
4189 port->pps_status = 0;
4190 port->pps_pending = true;
4191 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4192 mutex_unlock(&port->lock);
4193
4194 if (!wait_for_completion_timeout(&port->pps_complete,
4195 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4196 ret = -ETIMEDOUT;
4197 else
4198 ret = port->pps_status;
4199
4200 goto swap_unlock;
4201
4202port_unlock:
4203 mutex_unlock(&port->lock);
4204swap_unlock:
4205 mutex_unlock(&port->swap_lock);
4206
4207 return ret;
4208}
4209
f2a8aa05 4210static int tcpm_pps_activate(struct tcpm_port *port, bool activate)
2eadc33f
AT		 4211{
4212 int ret = 0;
4213
4214 mutex_lock(&port->swap_lock);
4215 mutex_lock(&port->lock);
4216
4217 if (!port->pps_data.supported) {
4218 ret = -EOPNOTSUPP;
4219 goto port_unlock;
4220 }
4221
4222 /* Trying to deactivate PPS when already deactivated so just bail */
4223 if (!port->pps_data.active && !activate)
4224 goto port_unlock;
4225
4226 if (port->state != SNK_READY) {
4227 ret = -EAGAIN;
4228 goto port_unlock;
4229 }
4230
4231 reinit_completion(&port->pps_complete);
4232 port->pps_status = 0;
4233 port->pps_pending = true;
4234
4235 /* Trigger PPS request or move back to standard PDO contract */
4236 if (activate) {
4237 port->pps_data.out_volt = port->supply_voltage;
4238 port->pps_data.op_curr = port->current_limit;
4239 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4240 } else {
4241 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
4242 }
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
4253port_unlock:
4254 mutex_unlock(&port->lock);
4255swap_unlock:
4256 mutex_unlock(&port->swap_lock);
4257
4258 return ret;
4259}
4260
f0690a25
GR		 4261static void tcpm_init(struct tcpm_port *port)
4262{
4263 enum typec_cc_status cc1, cc2;
4264
4265 port->tcpc->init(port->tcpc);
4266
4267 tcpm_reset_port(port);
4268
4269 /*
4270 * XXX
4271 * Should possibly wait for VBUS to settle if it was enabled locally
4272 * since tcpm_reset_port() will disable VBUS.
4273 */
4274 port->vbus_present = port->tcpc->get_vbus(port->tcpc);
4275 if (port->vbus_present)
4276 port->vbus_never_low = true;
4277
4278 tcpm_set_state(port, tcpm_default_state(port), 0);
4279
4280 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
4281 _tcpm_cc_change(port, cc1, cc2);
4282
4283 /*
4284 * Some adapters need a clean slate at startup, and won't recover
4285 * otherwise. So do not try to be fancy and force a clean disconnect.
4286 */
b17dd571 4287 tcpm_set_state(port, PORT_RESET, 0);
f0690a25
GR		 4288}
4289
9b0ae699
BJS		 4290static int tcpm_port_type_set(const struct typec_capability *cap,
4291 enum typec_port_type type)
4292{
4293 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4294
4295 mutex_lock(&port->lock);
4296 if (type == port->port_type)
4297 goto port_unlock;
4298
4299 port->port_type = type;
4300
4301 if (!port->connected) {
4302 tcpm_set_state(port, PORT_RESET, 0);
ceeb1625 4303 } else if (type == TYPEC_PORT_SNK) {
9b0ae699
BJS		 4304 if (!(port->pwr_role == TYPEC_SINK &&
4305 port->data_role == TYPEC_DEVICE))
4306 tcpm_set_state(port, PORT_RESET, 0);
ceeb1625 4307 } else if (type == TYPEC_PORT_SRC) {
9b0ae699
BJS		 4308 if (!(port->pwr_role == TYPEC_SOURCE &&
4309 port->data_role == TYPEC_HOST))
4310 tcpm_set_state(port, PORT_RESET, 0);
4311 }
4312
4313port_unlock:
4314 mutex_unlock(&port->lock);
4315 return 0;
4316}
4317
f0690a25
GR		 4318void tcpm_tcpc_reset(struct tcpm_port *port)
4319{
4320 mutex_lock(&port->lock);
4321 /* XXX: Maintain PD connection if possible? */
4322 tcpm_init(port);
4323 mutex_unlock(&port->lock);
4324}
4325EXPORT_SYMBOL_GPL(tcpm_tcpc_reset);
4326
4327static int tcpm_copy_pdos(u32 *dest_pdo, const u32 *src_pdo,
4328 unsigned int nr_pdo)
4329{
4330 unsigned int i;
4331
4332 if (nr_pdo > PDO_MAX_OBJECTS)
4333 nr_pdo = PDO_MAX_OBJECTS;
4334
4335 for (i = 0; i < nr_pdo; i++)
4336 dest_pdo[i] = src_pdo[i];
4337
4338 return nr_pdo;
4339}
4340
193a6801
GR		 4341static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo,
4342 unsigned int nr_vdo)
4343{
4344 unsigned int i;
4345
4346 if (nr_vdo > VDO_MAX_OBJECTS)
4347 nr_vdo = VDO_MAX_OBJECTS;
4348
4349 for (i = 0; i < nr_vdo; i++)
4350 dest_vdo[i] = src_vdo[i];
4351
4352 return nr_vdo;
4353}
4354
96232cbc
LJ		 4355static int tcpm_fw_get_caps(struct tcpm_port *port,
4356 struct fwnode_handle *fwnode)
4357{
4358 const char *cap_str;
4359 int ret;
4360 u32 mw;
4361
4362 if (!fwnode)
4363 return -EINVAL;
4364
4365 /* USB data support is optional */
4366 ret = fwnode_property_read_string(fwnode, "data-role", &cap_str);
4367 if (ret == 0) {
4368 port->typec_caps.data = typec_find_port_data_role(cap_str);
4369 if (port->typec_caps.data < 0)
4370 return -EINVAL;
4371 }
4372
4373 ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
4374 if (ret < 0)
4375 return ret;
4376
4377 port->typec_caps.type = typec_find_port_power_role(cap_str);
4378 if (port->typec_caps.type < 0)
4379 return -EINVAL;
4380 port->port_type = port->typec_caps.type;
4381
4382 if (port->port_type == TYPEC_PORT_SNK)
4383 goto sink;
4384
4385 /* Get source pdos */
4386 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
4387 NULL, 0);
4388 if (ret <= 0)
4389 return -EINVAL;
4390
4391 port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
4392 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
4393 port->src_pdo, port->nr_src_pdo);
4394 if ((ret < 0) || tcpm_validate_caps(port, port->src_pdo,
4395 port->nr_src_pdo))
4396 return -EINVAL;
4397
4398 if (port->port_type == TYPEC_PORT_SRC)
4399 return 0;
4400
4401 /* Get the preferred power role for DRP */
4402 ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str);
4403 if (ret < 0)
4404 return ret;
4405
4406 port->typec_caps.prefer_role = typec_find_power_role(cap_str);
4407 if (port->typec_caps.prefer_role < 0)
4408 return -EINVAL;
4409sink:
4410 /* Get sink pdos */
4411 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
4412 NULL, 0);
4413 if (ret <= 0)
4414 return -EINVAL;
4415
4416 port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS);
4417 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
4418 port->snk_pdo, port->nr_snk_pdo);
4419 if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo,
4420 port->nr_snk_pdo))
4421 return -EINVAL;
4422
4423 if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0)
4424 return -EINVAL;
4425 port->operating_snk_mw = mw / 1000;
4426
23b5f732
BJS		 4427 port->self_powered = fwnode_property_read_bool(fwnode, "self-powered");
4428
96232cbc
LJ		 4429 return 0;
4430}
4431
5007e1b5
BJS		 4432int tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo,
4433 unsigned int nr_pdo)
f0690a25 4434{
5007e1b5
BJS		 4435 if (tcpm_validate_caps(port, pdo, nr_pdo))
4436 return -EINVAL;
4437
f0690a25
GR		 4438 mutex_lock(&port->lock);
4439 port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, pdo, nr_pdo);
4440 switch (port->state) {
4441 case SRC_UNATTACHED:
4442 case SRC_ATTACH_WAIT:
4443 case SRC_TRYWAIT:
4444 tcpm_set_cc(port, tcpm_rp_cc(port));
4445 break;
4446 case SRC_SEND_CAPABILITIES:
4447 case SRC_NEGOTIATE_CAPABILITIES:
4448 case SRC_READY:
4449 case SRC_WAIT_NEW_CAPABILITIES:
4450 tcpm_set_cc(port, tcpm_rp_cc(port));
4451 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
4452 break;
4453 default:
4454 break;
4455 }
4456 mutex_unlock(&port->lock);
5007e1b5 4457 return 0;
f0690a25
GR		 4458}
4459EXPORT_SYMBOL_GPL(tcpm_update_source_capabilities);
4460
5007e1b5
BJS		 4461int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo,
4462 unsigned int nr_pdo,
5007e1b5 4463 unsigned int operating_snk_mw)
f0690a25 4464{
5007e1b5
BJS		 4465 if (tcpm_validate_caps(port, pdo, nr_pdo))
4466 return -EINVAL;
4467
f0690a25
GR		 4468 mutex_lock(&port->lock);
4469 port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, pdo, nr_pdo);
f0690a25 4470 port->operating_snk_mw = operating_snk_mw;
2eadc33f 4471 port->update_sink_caps = true;
f0690a25
GR		 4472
4473 switch (port->state) {
4474 case SNK_NEGOTIATE_CAPABILITIES:
2eadc33f 4475 case SNK_NEGOTIATE_PPS_CAPABILITIES:
f0690a25
GR		 4476 case SNK_READY:
4477 case SNK_TRANSITION_SINK:
4478 case SNK_TRANSITION_SINK_VBUS:
2eadc33f
AT		 4479 if (port->pps_data.active)
4480 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4481 else
4482 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
f0690a25
GR		 4483 break;
4484 default:
4485 break;
4486 }
4487 mutex_unlock(&port->lock);
5007e1b5 4488 return 0;
f0690a25
GR		 4489}
4490EXPORT_SYMBOL_GPL(tcpm_update_sink_capabilities);
4491
f2a8aa05
AT		 4492/* Power Supply access to expose source power information */
4493enum tcpm_psy_online_states {
4494 TCPM_PSY_OFFLINE = 0,
4495 TCPM_PSY_FIXED_ONLINE,
4496 TCPM_PSY_PROG_ONLINE,
4497};
4498
4499static enum power_supply_property tcpm_psy_props[] = {
4500 POWER_SUPPLY_PROP_USB_TYPE,
4501 POWER_SUPPLY_PROP_ONLINE,
4502 POWER_SUPPLY_PROP_VOLTAGE_MIN,
4503 POWER_SUPPLY_PROP_VOLTAGE_MAX,
4504 POWER_SUPPLY_PROP_VOLTAGE_NOW,
4505 POWER_SUPPLY_PROP_CURRENT_MAX,
4506 POWER_SUPPLY_PROP_CURRENT_NOW,
4507};
4508
4509static int tcpm_psy_get_online(struct tcpm_port *port,
4510 union power_supply_propval *val)
4511{
4512 if (port->vbus_charge) {
4513 if (port->pps_data.active)
4514 val->intval = TCPM_PSY_PROG_ONLINE;
4515 else
4516 val->intval = TCPM_PSY_FIXED_ONLINE;
4517 } else {
4518 val->intval = TCPM_PSY_OFFLINE;
4519 }
4520
4521 return 0;
4522}
4523
4524static int tcpm_psy_get_voltage_min(struct tcpm_port *port,
4525 union power_supply_propval *val)
4526{
4527 if (port->pps_data.active)
4528 val->intval = port->pps_data.min_volt * 1000;
4529 else
4530 val->intval = port->supply_voltage * 1000;
4531
4532 return 0;
4533}
4534
4535static int tcpm_psy_get_voltage_max(struct tcpm_port *port,
4536 union power_supply_propval *val)
4537{
4538 if (port->pps_data.active)
4539 val->intval = port->pps_data.max_volt * 1000;
4540 else
4541 val->intval = port->supply_voltage * 1000;
4542
4543 return 0;
4544}
4545
4546static int tcpm_psy_get_voltage_now(struct tcpm_port *port,
4547 union power_supply_propval *val)
4548{
4549 val->intval = port->supply_voltage * 1000;
4550
4551 return 0;
4552}
4553
4554static int tcpm_psy_get_current_max(struct tcpm_port *port,
4555 union power_supply_propval *val)
4556{
4557 if (port->pps_data.active)
4558 val->intval = port->pps_data.max_curr * 1000;
4559 else
4560 val->intval = port->current_limit * 1000;
4561
4562 return 0;
4563}
4564
4565static int tcpm_psy_get_current_now(struct tcpm_port *port,
4566 union power_supply_propval *val)
4567{
4568 val->intval = port->current_limit * 1000;
4569
4570 return 0;
4571}
4572
4573static int tcpm_psy_get_prop(struct power_supply *psy,
4574 enum power_supply_property psp,
4575 union power_supply_propval *val)
4576{
4577 struct tcpm_port *port = power_supply_get_drvdata(psy);
4578 int ret = 0;
4579
4580 switch (psp) {
4581 case POWER_SUPPLY_PROP_USB_TYPE:
4582 val->intval = port->usb_type;
4583 break;
4584 case POWER_SUPPLY_PROP_ONLINE:
4585 ret = tcpm_psy_get_online(port, val);
4586 break;
4587 case POWER_SUPPLY_PROP_VOLTAGE_MIN:
4588 ret = tcpm_psy_get_voltage_min(port, val);
4589 break;
4590 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
4591 ret = tcpm_psy_get_voltage_max(port, val);
4592 break;
4593 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4594 ret = tcpm_psy_get_voltage_now(port, val);
4595 break;
4596 case POWER_SUPPLY_PROP_CURRENT_MAX:
4597 ret = tcpm_psy_get_current_max(port, val);
4598 break;
4599 case POWER_SUPPLY_PROP_CURRENT_NOW:
4600 ret = tcpm_psy_get_current_now(port, val);
4601 break;
4602 default:
4603 ret = -EINVAL;
4604 break;
4605 }
4606
4607 return ret;
4608}
4609
4610static int tcpm_psy_set_online(struct tcpm_port *port,
4611 const union power_supply_propval *val)
4612{
4613 int ret;
4614
4615 switch (val->intval) {
4616 case TCPM_PSY_FIXED_ONLINE:
4617 ret = tcpm_pps_activate(port, false);
4618 break;
4619 case TCPM_PSY_PROG_ONLINE:
4620 ret = tcpm_pps_activate(port, true);
4621 break;
4622 default:
4623 ret = -EINVAL;
4624 break;
4625 }
4626
4627 return ret;
4628}
4629
4630static int tcpm_psy_set_prop(struct power_supply *psy,
4631 enum power_supply_property psp,
4632 const union power_supply_propval *val)
4633{
4634 struct tcpm_port *port = power_supply_get_drvdata(psy);
4635 int ret;
4636
4637 switch (psp) {
4638 case POWER_SUPPLY_PROP_ONLINE:
4639 ret = tcpm_psy_set_online(port, val);
4640 break;
4641 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4642 if (val->intval < port->pps_data.min_volt * 1000 ||
4643 val->intval > port->pps_data.max_volt * 1000)
4644 ret = -EINVAL;
4645 else
4646 ret = tcpm_pps_set_out_volt(port, val->intval / 1000);
4647 break;
4648 case POWER_SUPPLY_PROP_CURRENT_NOW:
4649 if (val->intval > port->pps_data.max_curr * 1000)
4650 ret = -EINVAL;
4651 else
4652 ret = tcpm_pps_set_op_curr(port, val->intval / 1000);
4653 break;
4654 default:
4655 ret = -EINVAL;
4656 break;
4657 }
4658
4659 return ret;
4660}
4661
4662static int tcpm_psy_prop_writeable(struct power_supply *psy,
4663 enum power_supply_property psp)
4664{
4665 switch (psp) {
4666 case POWER_SUPPLY_PROP_ONLINE:
4667 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4668 case POWER_SUPPLY_PROP_CURRENT_NOW:
4669 return 1;
4670 default:
4671 return 0;
4672 }
4673}
4674
4675static enum power_supply_usb_type tcpm_psy_usb_types[] = {
4676 POWER_SUPPLY_USB_TYPE_C,
4677 POWER_SUPPLY_USB_TYPE_PD,
4678 POWER_SUPPLY_USB_TYPE_PD_PPS,
4679};
4680
4681static const char *tcpm_psy_name_prefix = "tcpm-source-psy-";
4682
4683static int devm_tcpm_psy_register(struct tcpm_port *port)
4684{
4685 struct power_supply_config psy_cfg = {};
4686 const char *port_dev_name = dev_name(port->dev);
4687 size_t psy_name_len = strlen(tcpm_psy_name_prefix) +
4688 strlen(port_dev_name) + 1;
4689 char *psy_name;
4690
4691 psy_cfg.drv_data = port;
c97a8cc1 4692 psy_cfg.fwnode = dev_fwnode(port->dev);
f2a8aa05
AT		 4693 psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL);
4694 if (!psy_name)
4695 return -ENOMEM;
4696
4697 snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix,
4698 port_dev_name);
4699 port->psy_desc.name = psy_name;
4700 port->psy_desc.type = POWER_SUPPLY_TYPE_USB,
4701 port->psy_desc.usb_types = tcpm_psy_usb_types;
4702 port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types);
4703 port->psy_desc.properties = tcpm_psy_props,
4704 port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props),
4705 port->psy_desc.get_property = tcpm_psy_get_prop,
4706 port->psy_desc.set_property = tcpm_psy_set_prop,
4707 port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable,
4708
4709 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
4710
4711 port->psy = devm_power_supply_register(port->dev, &port->psy_desc,
4712 &psy_cfg);
4713
4714 return PTR_ERR_OR_ZERO(port->psy);
4715}
4716
96232cbc
LJ		 4717static int tcpm_copy_caps(struct tcpm_port *port,
4718 const struct tcpc_config *tcfg)
4719{
4720 if (tcpm_validate_caps(port, tcfg->src_pdo, tcfg->nr_src_pdo) ||
4721 tcpm_validate_caps(port, tcfg->snk_pdo, tcfg->nr_snk_pdo))
4722 return -EINVAL;
4723
4724 port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcfg->src_pdo,
4725 tcfg->nr_src_pdo);
4726 port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcfg->snk_pdo,
4727 tcfg->nr_snk_pdo);
4728
4729 port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcfg->snk_vdo,
4730 tcfg->nr_snk_vdo);
4731
4732 port->operating_snk_mw = tcfg->operating_snk_mw;
4733
4734 port->typec_caps.prefer_role = tcfg->default_role;
4735 port->typec_caps.type = tcfg->type;
4736 port->typec_caps.data = tcfg->data;
23b5f732 4737 port->self_powered = port->tcpc->config->self_powered;
96232cbc
LJ		 4738
4739 return 0;
4740}
4741
f0690a25
GR		 4742struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
4743{
4744 struct tcpm_port *port;
4745 int i, err;
4746
96232cbc 4747 if (!dev || !tcpc ||
f0690a25
GR		 4748 !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc ||
4749 !tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus ||
4750 !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit)
4751 return ERR_PTR(-EINVAL);
4752
4753 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
4754 if (!port)
4755 return ERR_PTR(-ENOMEM);
4756
4757 port->dev = dev;
4758 port->tcpc = tcpc;
4759
4760 mutex_init(&port->lock);
4761 mutex_init(&port->swap_lock);
4762
4763 port->wq = create_singlethread_workqueue(dev_name(dev));
4764 if (!port->wq)
4765 return ERR_PTR(-ENOMEM);
4766 INIT_DELAYED_WORK(&port->state_machine, tcpm_state_machine_work);
4767 INIT_DELAYED_WORK(&port->vdm_state_machine, vdm_state_machine_work);
4768 INIT_WORK(&port->event_work, tcpm_pd_event_handler);
4769
4770 spin_lock_init(&port->pd_event_lock);
4771
4772 init_completion(&port->tx_complete);
4773 init_completion(&port->swap_complete);
2eadc33f 4774 init_completion(&port->pps_complete);
5007e1b5 4775 tcpm_debugfs_init(port);
f0690a25 4776
96232cbc
LJ		 4777 err = tcpm_fw_get_caps(port, tcpc->fwnode);
4778 if ((err < 0) && tcpc->config)
4779 err = tcpm_copy_caps(port, tcpc->config);
4780 if (err < 0)
5007e1b5 4781 goto out_destroy_wq;
96232cbc
LJ		 4782
4783 if (!tcpc->config || !tcpc->config->try_role_hw)
4784 port->try_role = port->typec_caps.prefer_role;
f0690a25
GR		 4785 else
4786 port->try_role = TYPEC_NO_PREFERRED_ROLE;
4787
5e85a04c 4788 port->typec_caps.fwnode = tcpc->fwnode;
f0690a25 4789 port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */
2eadc33f 4790 port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */
f0690a25
GR		 4791 port->typec_caps.dr_set = tcpm_dr_set;
4792 port->typec_caps.pr_set = tcpm_pr_set;
4793 port->typec_caps.vconn_set = tcpm_vconn_set;
4794 port->typec_caps.try_role = tcpm_try_role;
9b0ae699 4795 port->typec_caps.port_type_set = tcpm_port_type_set;
f0690a25
GR		 4796
4797 port->partner_desc.identity = &port->partner_ident;
96232cbc 4798 port->port_type = port->typec_caps.type;
f0690a25 4799
2000016c
HG		 4800 port->role_sw = usb_role_switch_get(port->dev);
4801 if (IS_ERR(port->role_sw)) {
4802 err = PTR_ERR(port->role_sw);
4803 goto out_destroy_wq;
4804 }
4805
f2a8aa05
AT		 4806 err = devm_tcpm_psy_register(port);
4807 if (err)
4808 goto out_destroy_wq;
4809
f0690a25 4810 port->typec_port = typec_register_port(port->dev, &port->typec_caps);
cf6e06cd
HK		 4811 if (IS_ERR(port->typec_port)) {
4812 err = PTR_ERR(port->typec_port);
f0690a25
GR		 4813 goto out_destroy_wq;
4814 }
4815
96232cbc 4816 if (tcpc->config && tcpc->config->alt_modes) {
3c41dbde 4817 const struct typec_altmode_desc *paltmode = tcpc->config->alt_modes;
f0690a25
GR		 4818
4819 i = 0;
4820 while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) {
cf6e06cd
HK		 4821 struct typec_altmode *alt;
4822
4823 alt = typec_port_register_altmode(port->typec_port,
4824 paltmode);
4825 if (IS_ERR(alt)) {
f0690a25
GR		 4826 tcpm_log(port,
4827 "%s: failed to register port alternate mode 0x%x",
4828 dev_name(dev), paltmode->svid);
4829 break;
4830 }
e9576fe8
HK		 4831 typec_altmode_set_drvdata(alt, port);
4832 alt->ops = &tcpm_altmode_ops;
cf6e06cd 4833 port->port_altmode[i] = alt;
f0690a25
GR		 4834 i++;
4835 paltmode++;
4836 }
4837 }
4838
f0690a25
GR		 4839 mutex_lock(&port->lock);
4840 tcpm_init(port);
4841 mutex_unlock(&port->lock);
4842
4843 tcpm_log(port, "%s: registered", dev_name(dev));
4844 return port;
4845
4846out_destroy_wq:
2000016c 4847 usb_role_switch_put(port->role_sw);
f0690a25
GR		 4848 destroy_workqueue(port->wq);
4849 return ERR_PTR(err);
4850}
4851EXPORT_SYMBOL_GPL(tcpm_register_port);
4852
4853void tcpm_unregister_port(struct tcpm_port *port)
4854{
4855 int i;
4856
a6d5d230 4857 tcpm_reset_port(port);
f0690a25
GR		 4858 for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++)
4859 typec_unregister_altmode(port->port_altmode[i]);
4860 typec_unregister_port(port->typec_port);
5671a460 4861 usb_role_switch_put(port->role_sw);
f0690a25
GR		 4862 tcpm_debugfs_exit(port);
4863 destroy_workqueue(port->wq);
4864}
4865EXPORT_SYMBOL_GPL(tcpm_unregister_port);
4866
4867MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>");
4868MODULE_DESCRIPTION("USB Type-C Port Manager");
4869MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)