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usb: export firmware port location in sysfs
[linux-2.6-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
f0690a25
GR		 320#ifdef CONFIG_DEBUG_FS
321 struct dentry *dentry;
322 struct mutex logbuffer_lock; /* log buffer access lock */
323 int logbuffer_head;
324 int logbuffer_tail;
325 u8 *logbuffer[LOG_BUFFER_ENTRIES];
326#endif
327};
328
329struct pd_rx_event {
330 struct work_struct work;
331 struct tcpm_port *port;
332 struct pd_message msg;
333};
334
335#define tcpm_cc_is_sink(cc) \
336 ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \
337 (cc) == TYPEC_CC_RP_3_0)
338
339#define tcpm_port_is_sink(port) \
340 ((tcpm_cc_is_sink((port)->cc1) && !tcpm_cc_is_sink((port)->cc2)) || \
341 (tcpm_cc_is_sink((port)->cc2) && !tcpm_cc_is_sink((port)->cc1)))
342
343#define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD)
344#define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA)
345#define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN)
346
347#define tcpm_port_is_source(port) \
348 ((tcpm_cc_is_source((port)->cc1) && \
349 !tcpm_cc_is_source((port)->cc2)) || \
350 (tcpm_cc_is_source((port)->cc2) && \
351 !tcpm_cc_is_source((port)->cc1)))
352
353#define tcpm_port_is_debug(port) \
354 (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2))
355
356#define tcpm_port_is_audio(port) \
357 (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2))
358
359#define tcpm_port_is_audio_detached(port) \
360 ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \
361 (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1)))
362
363#define tcpm_try_snk(port) \
ff6c8cb1
BJS		 364 ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \
365 (port)->port_type == TYPEC_PORT_DRP)
f0690a25
GR		 366
367#define tcpm_try_src(port) \
ff6c8cb1
BJS		 368 ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \
369 (port)->port_type == TYPEC_PORT_DRP)
f0690a25
GR		 370
371static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
372{
9b0ae699 373 if (port->port_type == TYPEC_PORT_DRP) {
b46a9c90
BJS		 374 if (port->try_role == TYPEC_SINK)
375 return SNK_UNATTACHED;
376 else if (port->try_role == TYPEC_SOURCE)
377 return SRC_UNATTACHED;
378 else if (port->tcpc->config->default_role == TYPEC_SINK)
379 return SNK_UNATTACHED;
380 /* Fall through to return SRC_UNATTACHED */
ceeb1625 381 } else if (port->port_type == TYPEC_PORT_SNK) {
f0690a25 382 return SNK_UNATTACHED;
b46a9c90 383 }
f0690a25
GR		 384 return SRC_UNATTACHED;
385}
386
387static inline
388struct tcpm_port *typec_cap_to_tcpm(const struct typec_capability *cap)
389{
390 return container_of(cap, struct tcpm_port, typec_caps);
391}
392
393static bool tcpm_port_is_disconnected(struct tcpm_port *port)
394{
395 return (!port->attached && port->cc1 == TYPEC_CC_OPEN &&
396 port->cc2 == TYPEC_CC_OPEN) ||
397 (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 &&
398 port->cc1 == TYPEC_CC_OPEN) ||
399 (port->polarity == TYPEC_POLARITY_CC2 &&
400 port->cc2 == TYPEC_CC_OPEN)));
401}
402
403/*
404 * Logging
405 */
406
407#ifdef CONFIG_DEBUG_FS
408
409static bool tcpm_log_full(struct tcpm_port *port)
410{
411 return port->logbuffer_tail ==
412 (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
413}
414
e79e0125 415__printf(2, 0)
f0690a25
GR		 416static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args)
417{
418 char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
419 u64 ts_nsec = local_clock();
420 unsigned long rem_nsec;
421
d5a4f935 422 mutex_lock(&port->logbuffer_lock);
f0690a25
GR		 423 if (!port->logbuffer[port->logbuffer_head]) {
424 port->logbuffer[port->logbuffer_head] =
425 kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
d5a4f935
PC		 426 if (!port->logbuffer[port->logbuffer_head]) {
427 mutex_unlock(&port->logbuffer_lock);
f0690a25 428 return;
d5a4f935 429 }
f0690a25
GR		 430 }
431
432 vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
433
f0690a25
GR		 434 if (tcpm_log_full(port)) {
435 port->logbuffer_head = max(port->logbuffer_head - 1, 0);
436 strcpy(tmpbuffer, "overflow");
437 }
438
439 if (port->logbuffer_head < 0 ||
440 port->logbuffer_head >= LOG_BUFFER_ENTRIES) {
441 dev_warn(port->dev,
442 "Bad log buffer index %d\n", port->logbuffer_head);
443 goto abort;
444 }
445
446 if (!port->logbuffer[port->logbuffer_head]) {
447 dev_warn(port->dev,
448 "Log buffer index %d is NULL\n", port->logbuffer_head);
449 goto abort;
450 }
451
452 rem_nsec = do_div(ts_nsec, 1000000000);
453 scnprintf(port->logbuffer[port->logbuffer_head],
454 LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
455 (unsigned long)ts_nsec, rem_nsec / 1000,
456 tmpbuffer);
457 port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
458
459abort:
460 mutex_unlock(&port->logbuffer_lock);
461}
462
e79e0125 463__printf(2, 3)
f0690a25
GR		 464static void tcpm_log(struct tcpm_port *port, const char *fmt, ...)
465{
466 va_list args;
467
468 /* Do not log while disconnected and unattached */
469 if (tcpm_port_is_disconnected(port) &&
470 (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED ||
471 port->state == DRP_TOGGLING))
472 return;
473
474 va_start(args, fmt);
475 _tcpm_log(port, fmt, args);
476 va_end(args);
477}
478
e79e0125 479__printf(2, 3)
f0690a25
GR		 480static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...)
481{
482 va_list args;
483
484 va_start(args, fmt);
485 _tcpm_log(port, fmt, args);
486 va_end(args);
487}
488
489static void tcpm_log_source_caps(struct tcpm_port *port)
490{
491 int i;
492
493 for (i = 0; i < port->nr_source_caps; i++) {
494 u32 pdo = port->source_caps[i];
495 enum pd_pdo_type type = pdo_type(pdo);
496 char msg[64];
497
498 switch (type) {
499 case PDO_TYPE_FIXED:
500 scnprintf(msg, sizeof(msg),
501 "%u mV, %u mA [%s%s%s%s%s%s]",
502 pdo_fixed_voltage(pdo),
503 pdo_max_current(pdo),
504 (pdo & PDO_FIXED_DUAL_ROLE) ?
505 "R" : "",
506 (pdo & PDO_FIXED_SUSPEND) ?
507 "S" : "",
508 (pdo & PDO_FIXED_HIGHER_CAP) ?
509 "H" : "",
510 (pdo & PDO_FIXED_USB_COMM) ?
511 "U" : "",
512 (pdo & PDO_FIXED_DATA_SWAP) ?
513 "D" : "",
514 (pdo & PDO_FIXED_EXTPOWER) ?
515 "E" : "");
516 break;
517 case PDO_TYPE_VAR:
518 scnprintf(msg, sizeof(msg),
519 "%u-%u mV, %u mA",
520 pdo_min_voltage(pdo),
521 pdo_max_voltage(pdo),
522 pdo_max_current(pdo));
523 break;
524 case PDO_TYPE_BATT:
525 scnprintf(msg, sizeof(msg),
526 "%u-%u mV, %u mW",
527 pdo_min_voltage(pdo),
528 pdo_max_voltage(pdo),
529 pdo_max_power(pdo));
530 break;
2eadc33f
AT		 531 case PDO_TYPE_APDO:
532 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS)
533 scnprintf(msg, sizeof(msg),
534 "%u-%u mV, %u mA",
535 pdo_pps_apdo_min_voltage(pdo),
536 pdo_pps_apdo_max_voltage(pdo),
537 pdo_pps_apdo_max_current(pdo));
538 else
539 strcpy(msg, "undefined APDO");
540 break;
f0690a25
GR		 541 default:
542 strcpy(msg, "undefined");
543 break;
544 }
545 tcpm_log(port, " PDO %d: type %d, %s",
546 i, type, msg);
547 }
548}
549
9e902c59 550static int tcpm_debug_show(struct seq_file *s, void *v)
f0690a25
GR		 551{
552 struct tcpm_port *port = (struct tcpm_port *)s->private;
553 int tail;
554
555 mutex_lock(&port->logbuffer_lock);
556 tail = port->logbuffer_tail;
557 while (tail != port->logbuffer_head) {
558 seq_printf(s, "%s\n", port->logbuffer[tail]);
559 tail = (tail + 1) % LOG_BUFFER_ENTRIES;
560 }
561 if (!seq_has_overflowed(s))
562 port->logbuffer_tail = tail;
563 mutex_unlock(&port->logbuffer_lock);
564
565 return 0;
566}
9e902c59 567DEFINE_SHOW_ATTRIBUTE(tcpm_debug);
f0690a25
GR		 568
569static struct dentry *rootdir;
570
a941fc39 571static void tcpm_debugfs_init(struct tcpm_port *port)
f0690a25
GR		 572{
573 mutex_init(&port->logbuffer_lock);
574 /* /sys/kernel/debug/tcpm/usbcX */
a941fc39 575 if (!rootdir)
f0690a25 576 rootdir = debugfs_create_dir("tcpm", NULL);
f0690a25
GR		 577
578 port->dentry = debugfs_create_file(dev_name(port->dev),
579 S_IFREG | 0444, rootdir,
9e902c59 580 port, &tcpm_debug_fops);
f0690a25
GR		 581}
582
583static void tcpm_debugfs_exit(struct tcpm_port *port)
584{
585 debugfs_remove(port->dentry);
586}
587
588#else
589
e79e0125 590__printf(2, 3)
f0690a25 591static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { }
e79e0125 592__printf(2, 3)
f0690a25
GR		 593static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { }
594static void tcpm_log_source_caps(struct tcpm_port *port) { }
a941fc39 595static void tcpm_debugfs_init(const struct tcpm_port *port) { }
f0690a25
GR		 596static void tcpm_debugfs_exit(const struct tcpm_port *port) { }
597
598#endif
599
600static int tcpm_pd_transmit(struct tcpm_port *port,
601 enum tcpm_transmit_type type,
602 const struct pd_message *msg)
603{
604 unsigned long timeout;
605 int ret;
606
607 if (msg)
608 tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header));
609 else
610 tcpm_log(port, "PD TX, type: %#x", type);
611
612 reinit_completion(&port->tx_complete);
613 ret = port->tcpc->pd_transmit(port->tcpc, type, msg);
614 if (ret < 0)
615 return ret;
616
617 mutex_unlock(&port->lock);
618 timeout = wait_for_completion_timeout(&port->tx_complete,
619 msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT));
620 mutex_lock(&port->lock);
621 if (!timeout)
622 return -ETIMEDOUT;
623
624 switch (port->tx_status) {
625 case TCPC_TX_SUCCESS:
626 port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK;
627 return 0;
628 case TCPC_TX_DISCARDED:
629 return -EAGAIN;
630 case TCPC_TX_FAILED:
631 default:
632 return -EIO;
633 }
634}
635
636void tcpm_pd_transmit_complete(struct tcpm_port *port,
637 enum tcpm_transmit_status status)
638{
639 tcpm_log(port, "PD TX complete, status: %u", status);
640 port->tx_status = status;
641 complete(&port->tx_complete);
642}
643EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete);
644
e9576fe8 645static int tcpm_mux_set(struct tcpm_port *port, int state,
2000016c
HG		 646 enum usb_role usb_role,
647 enum typec_orientation orientation)
f0690a25 648{
2000016c 649 int ret;
f0690a25 650
e9576fe8
HK		 651 tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d",
652 state, usb_role, orientation);
f0690a25 653
2000016c
HG		 654 ret = typec_set_orientation(port->typec_port, orientation);
655 if (ret)
656 return ret;
f0690a25 657
2000016c
HG		 658 if (port->role_sw) {
659 ret = usb_role_switch_set_role(port->role_sw, usb_role);
660 if (ret)
661 return ret;
662 }
663
e9576fe8 664 return typec_set_mode(port->typec_port, state);
f0690a25
GR		 665}
666
667static int tcpm_set_polarity(struct tcpm_port *port,
668 enum typec_cc_polarity polarity)
669{
670 int ret;
671
672 tcpm_log(port, "polarity %d", polarity);
673
674 ret = port->tcpc->set_polarity(port->tcpc, polarity);
675 if (ret < 0)
676 return ret;
677
678 port->polarity = polarity;
679
680 return 0;
681}
682
683static int tcpm_set_vconn(struct tcpm_port *port, bool enable)
684{
685 int ret;
686
687 tcpm_log(port, "vconn:=%d", enable);
688
689 ret = port->tcpc->set_vconn(port->tcpc, enable);
690 if (!ret) {
691 port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK;
692 typec_set_vconn_role(port->typec_port, port->vconn_role);
693 }
694
695 return ret;
696}
697
698static u32 tcpm_get_current_limit(struct tcpm_port *port)
699{
700 enum typec_cc_status cc;
701 u32 limit;
702
703 cc = port->polarity ? port->cc2 : port->cc1;
704 switch (cc) {
705 case TYPEC_CC_RP_1_5:
706 limit = 1500;
707 break;
708 case TYPEC_CC_RP_3_0:
709 limit = 3000;
710 break;
711 case TYPEC_CC_RP_DEF:
712 default:
ea62cfc7
HG		 713 if (port->tcpc->get_current_limit)
714 limit = port->tcpc->get_current_limit(port->tcpc);
715 else
716 limit = 0;
f0690a25
GR		 717 break;
718 }
719
720 return limit;
721}
722
723static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv)
724{
725 int ret = -EOPNOTSUPP;
726
727 tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma);
728
146971e6
HG		 729 port->supply_voltage = mv;
730 port->current_limit = max_ma;
731
f0690a25
GR		 732 if (port->tcpc->set_current_limit)
733 ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv);
734
735 return ret;
736}
737
738/*
739 * Determine RP value to set based on maximum current supported
740 * by a port if configured as source.
741 * Returns CC value to report to link partner.
742 */
743static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port)
744{
745 const u32 *src_pdo = port->src_pdo;
746 int nr_pdo = port->nr_src_pdo;
747 int i;
748
749 /*
750 * Search for first entry with matching voltage.
751 * It should report the maximum supported current.
752 */
753 for (i = 0; i < nr_pdo; i++) {
754 const u32 pdo = src_pdo[i];
755
756 if (pdo_type(pdo) == PDO_TYPE_FIXED &&
757 pdo_fixed_voltage(pdo) == 5000) {
758 unsigned int curr = pdo_max_current(pdo);
759
760 if (curr >= 3000)
761 return TYPEC_CC_RP_3_0;
762 else if (curr >= 1500)
763 return TYPEC_CC_RP_1_5;
764 return TYPEC_CC_RP_DEF;
765 }
766 }
767
768 return TYPEC_CC_RP_DEF;
769}
770
771static int tcpm_set_attached_state(struct tcpm_port *port, bool attached)
772{
773 return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role,
774 port->data_role);
775}
776
777static int tcpm_set_roles(struct tcpm_port *port, bool attached,
778 enum typec_role role, enum typec_data_role data)
779{
2000016c 780 enum typec_orientation orientation;
c6962c29 781 enum usb_role usb_role;
f0690a25
GR		 782 int ret;
783
2000016c
HG		 784 if (port->polarity == TYPEC_POLARITY_CC1)
785 orientation = TYPEC_ORIENTATION_NORMAL;
786 else
787 orientation = TYPEC_ORIENTATION_REVERSE;
788
f0690a25 789 if (data == TYPEC_HOST)
c6962c29 790 usb_role = USB_ROLE_HOST;
f0690a25 791 else
c6962c29
HG		 792 usb_role = USB_ROLE_DEVICE;
793
e9576fe8 794 ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation);
f0690a25
GR		 795 if (ret < 0)
796 return ret;
797
798 ret = port->tcpc->set_roles(port->tcpc, attached, role, data);
799 if (ret < 0)
800 return ret;
801
802 port->pwr_role = role;
803 port->data_role = data;
804 typec_set_data_role(port->typec_port, data);
805 typec_set_pwr_role(port->typec_port, role);
806
807 return 0;
808}
809
810static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role)
811{
812 int ret;
813
814 ret = port->tcpc->set_roles(port->tcpc, true, role,
815 port->data_role);
816 if (ret < 0)
817 return ret;
818
819 port->pwr_role = role;
820 typec_set_pwr_role(port->typec_port, role);
821
822 return 0;
823}
824
825static int tcpm_pd_send_source_caps(struct tcpm_port *port)
826{
827 struct pd_message msg;
828 int i;
829
830 memset(&msg, 0, sizeof(msg));
831 if (!port->nr_src_pdo) {
832 /* No source capabilities defined, sink only */
833 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
834 port->pwr_role,
835 port->data_role,
2eadc33f 836 port->negotiated_rev,
f0690a25
GR		 837 port->message_id, 0);
838 } else {
839 msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP,
840 port->pwr_role,
841 port->data_role,
2eadc33f 842 port->negotiated_rev,
f0690a25
GR		 843 port->message_id,
844 port->nr_src_pdo);
845 }
846 for (i = 0; i < port->nr_src_pdo; i++)
847 msg.payload[i] = cpu_to_le32(port->src_pdo[i]);
848
849 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
850}
851
852static int tcpm_pd_send_sink_caps(struct tcpm_port *port)
853{
854 struct pd_message msg;
855 int i;
856
857 memset(&msg, 0, sizeof(msg));
858 if (!port->nr_snk_pdo) {
859 /* No sink capabilities defined, source only */
860 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
861 port->pwr_role,
862 port->data_role,
2eadc33f 863 port->negotiated_rev,
f0690a25
GR		 864 port->message_id, 0);
865 } else {
866 msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP,
867 port->pwr_role,
868 port->data_role,
2eadc33f 869 port->negotiated_rev,
f0690a25
GR		 870 port->message_id,
871 port->nr_snk_pdo);
872 }
873 for (i = 0; i < port->nr_snk_pdo; i++)
874 msg.payload[i] = cpu_to_le32(port->snk_pdo[i]);
875
876 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
877}
878
879static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state,
880 unsigned int delay_ms)
881{
882 if (delay_ms) {
883 tcpm_log(port, "pending state change %s -> %s @ %u ms",
884 tcpm_states[port->state], tcpm_states[state],
885 delay_ms);
886 port->delayed_state = state;
887 mod_delayed_work(port->wq, &port->state_machine,
888 msecs_to_jiffies(delay_ms));
889 port->delayed_runtime = jiffies + msecs_to_jiffies(delay_ms);
890 port->delay_ms = delay_ms;
891 } else {
892 tcpm_log(port, "state change %s -> %s",
893 tcpm_states[port->state], tcpm_states[state]);
894 port->delayed_state = INVALID_STATE;
895 port->prev_state = port->state;
896 port->state = state;
897 /*
898 * Don't re-queue the state machine work item if we're currently
899 * in the state machine and we're immediately changing states.
900 * tcpm_state_machine_work() will continue running the state
901 * machine.
902 */
903 if (!port->state_machine_running)
904 mod_delayed_work(port->wq, &port->state_machine, 0);
905 }
906}
907
908static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state,
909 unsigned int delay_ms)
910{
911 if (port->enter_state == port->state)
912 tcpm_set_state(port, state, delay_ms);
913 else
914 tcpm_log(port,
915 "skipped %sstate change %s -> %s [%u ms], context state %s",
916 delay_ms ? "delayed " : "",
917 tcpm_states[port->state], tcpm_states[state],
918 delay_ms, tcpm_states[port->enter_state]);
919}
920
921static void tcpm_queue_message(struct tcpm_port *port,
922 enum pd_msg_request message)
923{
924 port->queued_message = message;
925 mod_delayed_work(port->wq, &port->state_machine, 0);
926}
927
928/*
929 * VDM/VDO handling functions
930 */
931static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
932 const u32 *data, int cnt)
933{
934 port->vdo_count = cnt + 1;
935 port->vdo_data[0] = header;
936 memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt);
937 /* Set ready, vdm state machine will actually send */
938 port->vdm_retries = 0;
939 port->vdm_state = VDM_STATE_READY;
940}
941
942static void svdm_consume_identity(struct tcpm_port *port, const __le32 *payload,
943 int cnt)
944{
945 u32 vdo = le32_to_cpu(payload[VDO_INDEX_IDH]);
946 u32 product = le32_to_cpu(payload[VDO_INDEX_PRODUCT]);
947
948 memset(&port->mode_data, 0, sizeof(port->mode_data));
949
f0690a25
GR		 950 port->partner_ident.id_header = vdo;
951 port->partner_ident.cert_stat = le32_to_cpu(payload[VDO_INDEX_CSTAT]);
952 port->partner_ident.product = product;
953
954 typec_partner_set_identity(port->partner);
955
956 tcpm_log(port, "Identity: %04x:%04x.%04x",
957 PD_IDH_VID(vdo),
958 PD_PRODUCT_PID(product), product & 0xffff);
959}
960
961static bool svdm_consume_svids(struct tcpm_port *port, const __le32 *payload,
962 int cnt)
963{
964 struct pd_mode_data *pmdata = &port->mode_data;
965 int i;
966
967 for (i = 1; i < cnt; i++) {
968 u32 p = le32_to_cpu(payload[i]);
969 u16 svid;
970
971 svid = (p >> 16) & 0xffff;
972 if (!svid)
973 return false;
974
975 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
976 goto abort;
977
978 pmdata->svids[pmdata->nsvids++] = svid;
979 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
980
981 svid = p & 0xffff;
982 if (!svid)
983 return false;
984
985 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
986 goto abort;
987
988 pmdata->svids[pmdata->nsvids++] = svid;
989 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
990 }
991 return true;
992abort:
993 tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX);
994 return false;
995}
996
997static void svdm_consume_modes(struct tcpm_port *port, const __le32 *payload,
998 int cnt)
999{
1000 struct pd_mode_data *pmdata = &port->mode_data;
1001 struct typec_altmode_desc *paltmode;
f0690a25
GR		 1002 int i;
1003
1004 if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) {
1005 /* Already logged in svdm_consume_svids() */
1006 return;
1007 }
1008
4ab8c18d
HK		 1009 for (i = 1; i < cnt; i++) {
1010 paltmode = &pmdata->altmode_desc[pmdata->altmodes];
1011 memset(paltmode, 0, sizeof(*paltmode));
1012
1013 paltmode->svid = pmdata->svids[pmdata->svid_index];
1014 paltmode->mode = i;
1015 paltmode->vdo = le32_to_cpu(payload[i]);
1016
1017 tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x",
1018 pmdata->altmodes, paltmode->svid,
1019 paltmode->mode, paltmode->vdo);
1020
4ab8c18d 1021 pmdata->altmodes++;
f0690a25 1022 }
f0690a25
GR		 1023}
1024
e9576fe8
HK		 1025static void tcpm_register_partner_altmodes(struct tcpm_port *port)
1026{
1027 struct pd_mode_data *modep = &port->mode_data;
1028 struct typec_altmode *altmode;
1029 int i;
1030
1031 for (i = 0; i < modep->altmodes; i++) {
1032 altmode = typec_partner_register_altmode(port->partner,
1033 &modep->altmode_desc[i]);
1034 if (!altmode)
1035 tcpm_log(port, "Failed to register partner SVID 0x%04x",
1036 modep->altmode_desc[i].svid);
1037 port->partner_altmode[i] = altmode;
1038 }
1039}
1040
f0690a25
GR		 1041#define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header)
1042
1043static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt,
1044 u32 *response)
1045{
e9576fe8
HK		 1046 struct typec_altmode *adev;
1047 struct typec_altmode *pdev;
f0690a25 1048 struct pd_mode_data *modep;
e9576fe8 1049 u32 p[PD_MAX_PAYLOAD];
f0690a25 1050 int rlen = 0;
e9576fe8
HK		 1051 int cmd_type;
1052 int cmd;
193a6801 1053 int i;
f0690a25 1054
e9576fe8
HK		 1055 for (i = 0; i < cnt; i++)
1056 p[i] = le32_to_cpu(payload[i]);
1057
1058 cmd_type = PD_VDO_CMDT(p[0]);
1059 cmd = PD_VDO_CMD(p[0]);
1060
f0690a25 1061 tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d",
e9576fe8 1062 p[0], cmd_type, cmd, cnt);
f0690a25
GR		 1063
1064 modep = &port->mode_data;
1065
e9576fe8
HK		 1066 adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX,
1067 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1068
1069 pdev = typec_match_altmode(port->partner_altmode, ALTMODE_DISCOVERY_MAX,
1070 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1071
f0690a25
GR		 1072 switch (cmd_type) {
1073 case CMDT_INIT:
1074 switch (cmd) {
1075 case CMD_DISCOVER_IDENT:
193a6801
GR		 1076 /* 6.4.4.3.1: Only respond as UFP (device) */
1077 if (port->data_role == TYPEC_DEVICE &&
1078 port->nr_snk_vdo) {
1079 for (i = 0; i < port->nr_snk_vdo; i++)
cbe5843e 1080 response[i + 1] = port->snk_vdo[i];
193a6801
GR		 1081 rlen = port->nr_snk_vdo + 1;
1082 }
f0690a25
GR		 1083 break;
1084 case CMD_DISCOVER_SVID:
1085 break;
1086 case CMD_DISCOVER_MODES:
1087 break;
1088 case CMD_ENTER_MODE:
1089 break;
1090 case CMD_EXIT_MODE:
1091 break;
1092 case CMD_ATTENTION:
e9576fe8
HK		 1093 /* Attention command does not have response */
1094 typec_altmode_attention(adev, p[1]);
1095 return 0;
f0690a25
GR		 1096 default:
1097 break;
1098 }
1099 if (rlen >= 1) {
e9576fe8 1100 response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK);
f0690a25 1101 } else if (rlen == 0) {
e9576fe8 1102 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
f0690a25
GR		 1103 rlen = 1;
1104 } else {
e9576fe8 1105 response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY);
f0690a25
GR		 1106 rlen = 1;
1107 }
1108 break;
1109 case CMDT_RSP_ACK:
1110 /* silently drop message if we are not connected */
cf6e06cd 1111 if (IS_ERR_OR_NULL(port->partner))
f0690a25
GR		 1112 break;
1113
1114 switch (cmd) {
1115 case CMD_DISCOVER_IDENT:
1116 /* 6.4.4.3.1 */
1117 svdm_consume_identity(port, payload, cnt);
1118 response[0] = VDO(USB_SID_PD, 1, CMD_DISCOVER_SVID);
1119 rlen = 1;
1120 break;
1121 case CMD_DISCOVER_SVID:
1122 /* 6.4.4.3.2 */
1123 if (svdm_consume_svids(port, payload, cnt)) {
1124 response[0] = VDO(USB_SID_PD, 1,
1125 CMD_DISCOVER_SVID);
1126 rlen = 1;
1127 } else if (modep->nsvids && supports_modal(port)) {
1128 response[0] = VDO(modep->svids[0], 1,
1129 CMD_DISCOVER_MODES);
1130 rlen = 1;
1131 }
1132 break;
1133 case CMD_DISCOVER_MODES:
1134 /* 6.4.4.3.3 */
1135 svdm_consume_modes(port, payload, cnt);
1136 modep->svid_index++;
1137 if (modep->svid_index < modep->nsvids) {
e9576fe8 1138 u16 svid = modep->svids[modep->svid_index];
f0690a25
GR		 1139 response[0] = VDO(svid, 1, CMD_DISCOVER_MODES);
1140 rlen = 1;
1141 } else {
e9576fe8 1142 tcpm_register_partner_altmodes(port);
f0690a25
GR		 1143 }
1144 break;
1145 case CMD_ENTER_MODE:
e9576fe8
HK		 1146 typec_altmode_update_active(pdev, true);
1147
1148 if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
1149 response[0] = VDO(adev->svid, 1, CMD_EXIT_MODE);
1150 response[0] |= VDO_OPOS(adev->mode);
1151 return 1;
1152 }
1153 return 0;
1154 case CMD_EXIT_MODE:
1155 typec_altmode_update_active(pdev, false);
1156
1157 /* Back to USB Operation */
1158 WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB,
1159 NULL));
1160 break;
1161 default:
1162 break;
1163 }
1164 break;
1165 case CMDT_RSP_NAK:
1166 switch (cmd) {
1167 case CMD_ENTER_MODE:
1168 /* Back to USB Operation */
1169 WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB,
1170 NULL));
f0690a25
GR		 1171 break;
1172 default:
1173 break;
1174 }
1175 break;
1176 default:
1177 break;
1178 }
1179
e9576fe8
HK		 1180 /* Informing the alternate mode drivers about everything */
1181 typec_altmode_vdm(adev, p[0], &p[1], cnt);
1182
f0690a25
GR		 1183 return rlen;
1184}
1185
1186static void tcpm_handle_vdm_request(struct tcpm_port *port,
1187 const __le32 *payload, int cnt)
1188{
1189 int rlen = 0;
1190 u32 response[8] = { };
1191 u32 p0 = le32_to_cpu(payload[0]);
1192
1193 if (port->vdm_state == VDM_STATE_BUSY) {
1194 /* If UFP responded busy retry after timeout */
1195 if (PD_VDO_CMDT(p0) == CMDT_RSP_BUSY) {
1196 port->vdm_state = VDM_STATE_WAIT_RSP_BUSY;
1197 port->vdo_retry = (p0 & ~VDO_CMDT_MASK) |
1198 CMDT_INIT;
1199 mod_delayed_work(port->wq, &port->vdm_state_machine,
1200 msecs_to_jiffies(PD_T_VDM_BUSY));
1201 return;
1202 }
1203 port->vdm_state = VDM_STATE_DONE;
1204 }
1205
1206 if (PD_VDO_SVDM(p0))
1207 rlen = tcpm_pd_svdm(port, payload, cnt, response);
f0690a25
GR		 1208
1209 if (rlen > 0) {
1210 tcpm_queue_vdm(port, response[0], &response[1], rlen - 1);
1211 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1212 }
1213}
1214
1215static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd,
1216 const u32 *data, int count)
1217{
1218 u32 header;
1219
1220 if (WARN_ON(count > VDO_MAX_SIZE - 1))
1221 count = VDO_MAX_SIZE - 1;
1222
1223 /* set VDM header with VID & CMD */
1224 header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ?
1225 1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION), cmd);
1226 tcpm_queue_vdm(port, header, data, count);
1227
1228 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1229}
1230
1231static unsigned int vdm_ready_timeout(u32 vdm_hdr)
1232{
1233 unsigned int timeout;
1234 int cmd = PD_VDO_CMD(vdm_hdr);
1235
1236 /* its not a structured VDM command */
1237 if (!PD_VDO_SVDM(vdm_hdr))
1238 return PD_T_VDM_UNSTRUCTURED;
1239
1240 switch (PD_VDO_CMDT(vdm_hdr)) {
1241 case CMDT_INIT:
1242 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1243 timeout = PD_T_VDM_WAIT_MODE_E;
1244 else
1245 timeout = PD_T_VDM_SNDR_RSP;
1246 break;
1247 default:
1248 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1249 timeout = PD_T_VDM_E_MODE;
1250 else
1251 timeout = PD_T_VDM_RCVR_RSP;
1252 break;
1253 }
1254 return timeout;
1255}
1256
1257static void vdm_run_state_machine(struct tcpm_port *port)
1258{
1259 struct pd_message msg;
1260 int i, res;
1261
1262 switch (port->vdm_state) {
1263 case VDM_STATE_READY:
1264 /* Only transmit VDM if attached */
1265 if (!port->attached) {
1266 port->vdm_state = VDM_STATE_ERR_BUSY;
1267 break;
1268 }
1269
1270 /*
1271 * if there's traffic or we're not in PDO ready state don't send
1272 * a VDM.
1273 */
1274 if (port->state != SRC_READY && port->state != SNK_READY)
1275 break;
1276
1277 /* Prepare and send VDM */
1278 memset(&msg, 0, sizeof(msg));
1279 msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF,
1280 port->pwr_role,
1281 port->data_role,
2eadc33f 1282 port->negotiated_rev,
f0690a25
GR		 1283 port->message_id, port->vdo_count);
1284 for (i = 0; i < port->vdo_count; i++)
1285 msg.payload[i] = cpu_to_le32(port->vdo_data[i]);
1286 res = tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
1287 if (res < 0) {
1288 port->vdm_state = VDM_STATE_ERR_SEND;
1289 } else {
1290 unsigned long timeout;
1291
1292 port->vdm_retries = 0;
1293 port->vdm_state = VDM_STATE_BUSY;
1294 timeout = vdm_ready_timeout(port->vdo_data[0]);
1295 mod_delayed_work(port->wq, &port->vdm_state_machine,
1296 timeout);
1297 }
1298 break;
1299 case VDM_STATE_WAIT_RSP_BUSY:
1300 port->vdo_data[0] = port->vdo_retry;
1301 port->vdo_count = 1;
1302 port->vdm_state = VDM_STATE_READY;
1303 break;
1304 case VDM_STATE_BUSY:
1305 port->vdm_state = VDM_STATE_ERR_TMOUT;
1306 break;
1307 case VDM_STATE_ERR_SEND:
1308 /*
1309 * A partner which does not support USB PD will not reply,
1310 * so this is not a fatal error. At the same time, some
1311 * devices may not return GoodCRC under some circumstances,
1312 * so we need to retry.
1313 */
1314 if (port->vdm_retries < 3) {
1315 tcpm_log(port, "VDM Tx error, retry");
1316 port->vdm_retries++;
1317 port->vdm_state = VDM_STATE_READY;
1318 }
1319 break;
1320 default:
1321 break;
1322 }
1323}
1324
1325static void vdm_state_machine_work(struct work_struct *work)
1326{
1327 struct tcpm_port *port = container_of(work, struct tcpm_port,
1328 vdm_state_machine.work);
1329 enum vdm_states prev_state;
1330
1331 mutex_lock(&port->lock);
1332
1333 /*
1334 * Continue running as long as the port is not busy and there was
1335 * a state change.
1336 */
1337 do {
1338 prev_state = port->vdm_state;
1339 vdm_run_state_machine(port);
1340 } while (port->vdm_state != prev_state &&
1341 port->vdm_state != VDM_STATE_BUSY);
1342
1343 mutex_unlock(&port->lock);
1344}
1345
5007e1b5
BJS		 1346enum pdo_err {
1347 PDO_NO_ERR,
1348 PDO_ERR_NO_VSAFE5V,
1349 PDO_ERR_VSAFE5V_NOT_FIRST,
1350 PDO_ERR_PDO_TYPE_NOT_IN_ORDER,
1351 PDO_ERR_FIXED_NOT_SORTED,
1352 PDO_ERR_VARIABLE_BATT_NOT_SORTED,
1353 PDO_ERR_DUPE_PDO,
2eadc33f
AT		 1354 PDO_ERR_PPS_APDO_NOT_SORTED,
1355 PDO_ERR_DUPE_PPS_APDO,
5007e1b5
BJS		 1356};
1357
1358static const char * const pdo_err_msg[] = {
1359 [PDO_ERR_NO_VSAFE5V] =
1360 " err: source/sink caps should atleast have vSafe5V",
1361 [PDO_ERR_VSAFE5V_NOT_FIRST] =
1362 " err: vSafe5V Fixed Supply Object Shall always be the first object",
1363 [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] =
1364 " err: PDOs should be in the following order: Fixed; Battery; Variable",
1365 [PDO_ERR_FIXED_NOT_SORTED] =
1366 " err: Fixed supply pdos should be in increasing order of their fixed voltage",
1367 [PDO_ERR_VARIABLE_BATT_NOT_SORTED] =
1368 " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage",
1369 [PDO_ERR_DUPE_PDO] =
1370 " err: Variable/Batt supply pdos cannot have same min/max voltage",
2eadc33f
AT		 1371 [PDO_ERR_PPS_APDO_NOT_SORTED] =
1372 " err: Programmable power supply apdos should be in increasing order of their maximum voltage",
1373 [PDO_ERR_DUPE_PPS_APDO] =
1374 " err: Programmable power supply apdos cannot have same min/max voltage and max current",
5007e1b5
BJS		 1375};
1376
1377static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo,
1378 unsigned int nr_pdo)
1379{
1380 unsigned int i;
1381
1382 /* Should at least contain vSafe5v */
1383 if (nr_pdo < 1)
1384 return PDO_ERR_NO_VSAFE5V;
1385
1386 /* The vSafe5V Fixed Supply Object Shall always be the first object */
1387 if (pdo_type(pdo[0]) != PDO_TYPE_FIXED ||
1388 pdo_fixed_voltage(pdo[0]) != VSAFE5V)
1389 return PDO_ERR_VSAFE5V_NOT_FIRST;
1390
1391 for (i = 1; i < nr_pdo; i++) {
1392 if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) {
1393 return PDO_ERR_PDO_TYPE_NOT_IN_ORDER;
1394 } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) {
1395 enum pd_pdo_type type = pdo_type(pdo[i]);
1396
1397 switch (type) {
1398 /*
1399 * The remaining Fixed Supply Objects, if
1400 * present, shall be sent in voltage order;
1401 * lowest to highest.
1402 */
1403 case PDO_TYPE_FIXED:
1404 if (pdo_fixed_voltage(pdo[i]) <=
1405 pdo_fixed_voltage(pdo[i - 1]))
1406 return PDO_ERR_FIXED_NOT_SORTED;
1407 break;
1408 /*
1409 * The Battery Supply Objects and Variable
1410 * supply, if present shall be sent in Minimum
1411 * Voltage order; lowest to highest.
1412 */
1413 case PDO_TYPE_VAR:
1414 case PDO_TYPE_BATT:
1415 if (pdo_min_voltage(pdo[i]) <
1416 pdo_min_voltage(pdo[i - 1]))
1417 return PDO_ERR_VARIABLE_BATT_NOT_SORTED;
1418 else if ((pdo_min_voltage(pdo[i]) ==
1419 pdo_min_voltage(pdo[i - 1])) &&
1420 (pdo_max_voltage(pdo[i]) ==
1421 pdo_min_voltage(pdo[i - 1])))
1422 return PDO_ERR_DUPE_PDO;
1423 break;
2eadc33f
AT		 1424 /*
1425 * The Programmable Power Supply APDOs, if present,
1426 * shall be sent in Maximum Voltage order;
1427 * lowest to highest.
1428 */
1429 case PDO_TYPE_APDO:
1430 if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS)
1431 break;
1432
1b6af2f5
AT		 1433 if (pdo_pps_apdo_max_voltage(pdo[i]) <
1434 pdo_pps_apdo_max_voltage(pdo[i - 1]))
2eadc33f
AT		 1435 return PDO_ERR_PPS_APDO_NOT_SORTED;
1436 else if (pdo_pps_apdo_min_voltage(pdo[i]) ==
1437 pdo_pps_apdo_min_voltage(pdo[i - 1]) &&
1438 pdo_pps_apdo_max_voltage(pdo[i]) ==
1439 pdo_pps_apdo_max_voltage(pdo[i - 1]) &&
1440 pdo_pps_apdo_max_current(pdo[i]) ==
1441 pdo_pps_apdo_max_current(pdo[i - 1]))
1442 return PDO_ERR_DUPE_PPS_APDO;
1443 break;
5007e1b5
BJS		 1444 default:
1445 tcpm_log_force(port, " Unknown pdo type");
1446 }
1447 }
1448 }
1449
1450 return PDO_NO_ERR;
1451}
1452
1453static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo,
1454 unsigned int nr_pdo)
1455{
1456 enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo);
1457
1458 if (err_index != PDO_NO_ERR) {
1459 tcpm_log_force(port, " %s", pdo_err_msg[err_index]);
1460 return -EINVAL;
1461 }
1462
1463 return 0;
1464}
1465
e9576fe8
HK		 1466static int tcpm_altmode_enter(struct typec_altmode *altmode)
1467{
1468 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1469 u32 header;
1470
1471 mutex_lock(&port->lock);
1472 header = VDO(altmode->svid, 1, CMD_ENTER_MODE);
1473 header |= VDO_OPOS(altmode->mode);
1474
1475 tcpm_queue_vdm(port, header, NULL, 0);
1476 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1477 mutex_unlock(&port->lock);
1478
1479 return 0;
1480}
1481
1482static int tcpm_altmode_exit(struct typec_altmode *altmode)
1483{
1484 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1485 u32 header;
1486
1487 mutex_lock(&port->lock);
1488 header = VDO(altmode->svid, 1, CMD_EXIT_MODE);
1489 header |= VDO_OPOS(altmode->mode);
1490
1491 tcpm_queue_vdm(port, header, NULL, 0);
1492 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1493 mutex_unlock(&port->lock);
1494
1495 return 0;
1496}
1497
1498static int tcpm_altmode_vdm(struct typec_altmode *altmode,
1499 u32 header, const u32 *data, int count)
1500{
1501 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1502
1503 mutex_lock(&port->lock);
1504 tcpm_queue_vdm(port, header, data, count - 1);
1505 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1506 mutex_unlock(&port->lock);
1507
1508 return 0;
1509}
1510
1511static const struct typec_altmode_ops tcpm_altmode_ops = {
1512 .enter = tcpm_altmode_enter,
1513 .exit = tcpm_altmode_exit,
1514 .vdm = tcpm_altmode_vdm,
1515};
1516
f0690a25
GR		 1517/*
1518 * PD (data, control) command handling functions
1519 */
64f7c494
AT		 1520static inline enum tcpm_state ready_state(struct tcpm_port *port)
1521{
1522 if (port->pwr_role == TYPEC_SOURCE)
1523 return SRC_READY;
1524 else
1525 return SNK_READY;
1526}
2eadc33f
AT		 1527
1528static int tcpm_pd_send_control(struct tcpm_port *port,
1529 enum pd_ctrl_msg_type type);
1530
64f7c494
AT		 1531static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload,
1532 int cnt)
1533{
1534 u32 p0 = le32_to_cpu(payload[0]);
1535 unsigned int type = usb_pd_ado_type(p0);
1536
1537 if (!type) {
1538 tcpm_log(port, "Alert message received with no type");
1539 return;
1540 }
1541
1542 /* Just handling non-battery alerts for now */
1543 if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) {
1544 switch (port->state) {
1545 case SRC_READY:
1546 case SNK_READY:
1547 tcpm_set_state(port, GET_STATUS_SEND, 0);
1548 break;
1549 default:
1550 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1551 break;
1552 }
1553 }
1554}
1555
f0690a25
GR		 1556static void tcpm_pd_data_request(struct tcpm_port *port,
1557 const struct pd_message *msg)
1558{
1559 enum pd_data_msg_type type = pd_header_type_le(msg->header);
1560 unsigned int cnt = pd_header_cnt_le(msg->header);
2eadc33f 1561 unsigned int rev = pd_header_rev_le(msg->header);
f0690a25
GR		 1562 unsigned int i;
1563
1564 switch (type) {
1565 case PD_DATA_SOURCE_CAP:
1566 if (port->pwr_role != TYPEC_SINK)
1567 break;
1568
1569 for (i = 0; i < cnt; i++)
1570 port->source_caps[i] = le32_to_cpu(msg->payload[i]);
1571
1572 port->nr_source_caps = cnt;
1573
1574 tcpm_log_source_caps(port);
1575
5007e1b5
BJS		 1576 tcpm_validate_caps(port, port->source_caps,
1577 port->nr_source_caps);
1578
2eadc33f
AT		 1579 /*
1580 * Adjust revision in subsequent message headers, as required,
1581 * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
1582 * support Rev 1.0 so just do nothing in that scenario.
1583 */
1584 if (rev == PD_REV10)
1585 break;
1586
1587 if (rev < PD_MAX_REV)
1588 port->negotiated_rev = rev;
1589
f0690a25
GR		 1590 /*
1591 * This message may be received even if VBUS is not
1592 * present. This is quite unexpected; see USB PD
1593 * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2.
1594 * However, at the same time, we must be ready to
1595 * receive this message and respond to it 15ms after
1596 * receiving PS_RDY during power swap operations, no matter
1597 * if VBUS is available or not (USB PD specification,
1598 * section 6.5.9.2).
1599 * So we need to accept the message either way,
1600 * but be prepared to keep waiting for VBUS after it was
1601 * handled.
1602 */
1603 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
1604 break;
1605 case PD_DATA_REQUEST:
1606 if (port->pwr_role != TYPEC_SOURCE ||
1607 cnt != 1) {
1608 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1609 break;
1610 }
2eadc33f
AT		 1611
1612 /*
1613 * Adjust revision in subsequent message headers, as required,
1614 * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
1615 * support Rev 1.0 so just reject in that scenario.
1616 */
1617 if (rev == PD_REV10) {
1618 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1619 break;
1620 }
1621
1622 if (rev < PD_MAX_REV)
1623 port->negotiated_rev = rev;
1624
f0690a25
GR		 1625 port->sink_request = le32_to_cpu(msg->payload[0]);
1626 tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0);
1627 break;
1628 case PD_DATA_SINK_CAP:
1629 /* We don't do anything with this at the moment... */
1630 for (i = 0; i < cnt; i++)
1631 port->sink_caps[i] = le32_to_cpu(msg->payload[i]);
1632 port->nr_sink_caps = cnt;
1633 break;
1634 case PD_DATA_VENDOR_DEF:
1635 tcpm_handle_vdm_request(port, msg->payload, cnt);
1636 break;
1637 case PD_DATA_BIST:
1638 if (port->state == SRC_READY || port->state == SNK_READY) {
1639 port->bist_request = le32_to_cpu(msg->payload[0]);
1640 tcpm_set_state(port, BIST_RX, 0);
1641 }
1642 break;
64f7c494
AT		 1643 case PD_DATA_ALERT:
1644 tcpm_handle_alert(port, msg->payload, cnt);
1645 break;
1646 case PD_DATA_BATT_STATUS:
1647 case PD_DATA_GET_COUNTRY_INFO:
1648 /* Currently unsupported */
1649 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1650 break;
f0690a25
GR		 1651 default:
1652 tcpm_log(port, "Unhandled data message type %#x", type);
1653 break;
1654 }
1655}
1656
2eadc33f
AT		 1657static void tcpm_pps_complete(struct tcpm_port *port, int result)
1658{
1659 if (port->pps_pending) {
1660 port->pps_status = result;
1661 port->pps_pending = false;
1662 complete(&port->pps_complete);
1663 }
1664}
1665
f0690a25
GR		 1666static void tcpm_pd_ctrl_request(struct tcpm_port *port,
1667 const struct pd_message *msg)
1668{
1669 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
1670 enum tcpm_state next_state;
1671
1672 switch (type) {
1673 case PD_CTRL_GOOD_CRC:
1674 case PD_CTRL_PING:
1675 break;
1676 case PD_CTRL_GET_SOURCE_CAP:
1677 switch (port->state) {
1678 case SRC_READY:
1679 case SNK_READY:
1680 tcpm_queue_message(port, PD_MSG_DATA_SOURCE_CAP);
1681 break;
1682 default:
1683 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1684 break;
1685 }
1686 break;
1687 case PD_CTRL_GET_SINK_CAP:
1688 switch (port->state) {
1689 case SRC_READY:
1690 case SNK_READY:
1691 tcpm_queue_message(port, PD_MSG_DATA_SINK_CAP);
1692 break;
1693 default:
1694 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1695 break;
1696 }
1697 break;
1698 case PD_CTRL_GOTO_MIN:
1699 break;
1700 case PD_CTRL_PS_RDY:
1701 switch (port->state) {
1702 case SNK_TRANSITION_SINK:
1703 if (port->vbus_present) {
1704 tcpm_set_current_limit(port,
1705 port->current_limit,
1706 port->supply_voltage);
8bf05746 1707 port->explicit_contract = true;
f0690a25
GR		 1708 tcpm_set_state(port, SNK_READY, 0);
1709 } else {
1710 /*
1711 * Seen after power swap. Keep waiting for VBUS
1712 * in a transitional state.
1713 */
1714 tcpm_set_state(port,
1715 SNK_TRANSITION_SINK_VBUS, 0);
1716 }
1717 break;
b965b631 1718 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
f0690a25
GR		 1719 tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0);
1720 break;
1721 case PR_SWAP_SNK_SRC_SINK_OFF:
1722 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0);
1723 break;
1724 case VCONN_SWAP_WAIT_FOR_VCONN:
1725 tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0);
1726 break;
1727 default:
1728 break;
1729 }
1730 break;
1731 case PD_CTRL_REJECT:
1732 case PD_CTRL_WAIT:
64f7c494 1733 case PD_CTRL_NOT_SUPP:
f0690a25
GR		 1734 switch (port->state) {
1735 case SNK_NEGOTIATE_CAPABILITIES:
1736 /* USB PD specification, Figure 8-43 */
1737 if (port->explicit_contract)
1738 next_state = SNK_READY;
1739 else
1740 next_state = SNK_WAIT_CAPABILITIES;
1741 tcpm_set_state(port, next_state, 0);
1742 break;
2eadc33f
AT		 1743 case SNK_NEGOTIATE_PPS_CAPABILITIES:
1744 /* Revert data back from any requested PPS updates */
1745 port->pps_data.out_volt = port->supply_voltage;
1746 port->pps_data.op_curr = port->current_limit;
1747 port->pps_status = (type == PD_CTRL_WAIT ?
1748 -EAGAIN : -EOPNOTSUPP);
1749 tcpm_set_state(port, SNK_READY, 0);
1750 break;
f0690a25
GR		 1751 case DR_SWAP_SEND:
1752 port->swap_status = (type == PD_CTRL_WAIT ?
1753 -EAGAIN : -EOPNOTSUPP);
1754 tcpm_set_state(port, DR_SWAP_CANCEL, 0);
1755 break;
1756 case PR_SWAP_SEND:
1757 port->swap_status = (type == PD_CTRL_WAIT ?
1758 -EAGAIN : -EOPNOTSUPP);
1759 tcpm_set_state(port, PR_SWAP_CANCEL, 0);
1760 break;
1761 case VCONN_SWAP_SEND:
1762 port->swap_status = (type == PD_CTRL_WAIT ?
1763 -EAGAIN : -EOPNOTSUPP);
1764 tcpm_set_state(port, VCONN_SWAP_CANCEL, 0);
1765 break;
1766 default:
1767 break;
1768 }
1769 break;
1770 case PD_CTRL_ACCEPT:
1771 switch (port->state) {
1772 case SNK_NEGOTIATE_CAPABILITIES:
2eadc33f
AT		 1773 port->pps_data.active = false;
1774 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
1775 break;
1776 case SNK_NEGOTIATE_PPS_CAPABILITIES:
1777 port->pps_data.active = true;
1778 port->supply_voltage = port->pps_data.out_volt;
1779 port->current_limit = port->pps_data.op_curr;
f0690a25
GR		 1780 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
1781 break;
1782 case SOFT_RESET_SEND:
1783 port->message_id = 0;
5fec4b54 1784 port->rx_msgid = -1;
f0690a25
GR		 1785 if (port->pwr_role == TYPEC_SOURCE)
1786 next_state = SRC_SEND_CAPABILITIES;
1787 else
1788 next_state = SNK_WAIT_CAPABILITIES;
1789 tcpm_set_state(port, next_state, 0);
1790 break;
1791 case DR_SWAP_SEND:
1792 tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0);
1793 break;
1794 case PR_SWAP_SEND:
1795 tcpm_set_state(port, PR_SWAP_START, 0);
1796 break;
1797 case VCONN_SWAP_SEND:
1798 tcpm_set_state(port, VCONN_SWAP_START, 0);
1799 break;
1800 default:
1801 break;
1802 }
1803 break;
1804 case PD_CTRL_SOFT_RESET:
1805 tcpm_set_state(port, SOFT_RESET, 0);
1806 break;
1807 case PD_CTRL_DR_SWAP:
9b0ae699 1808 if (port->port_type != TYPEC_PORT_DRP) {
f0690a25
GR		 1809 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1810 break;
1811 }
1812 /*
1813 * XXX
1814 * 6.3.9: If an alternate mode is active, a request to swap
1815 * alternate modes shall trigger a port reset.
1816 */
1817 switch (port->state) {
1818 case SRC_READY:
1819 case SNK_READY:
1820 tcpm_set_state(port, DR_SWAP_ACCEPT, 0);
1821 break;
1822 default:
1823 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1824 break;
1825 }
1826 break;
1827 case PD_CTRL_PR_SWAP:
9b0ae699 1828 if (port->port_type != TYPEC_PORT_DRP) {
f0690a25
GR		 1829 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1830 break;
1831 }
1832 switch (port->state) {
1833 case SRC_READY:
1834 case SNK_READY:
1835 tcpm_set_state(port, PR_SWAP_ACCEPT, 0);
1836 break;
1837 default:
1838 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1839 break;
1840 }
1841 break;
1842 case PD_CTRL_VCONN_SWAP:
1843 switch (port->state) {
1844 case SRC_READY:
1845 case SNK_READY:
1846 tcpm_set_state(port, VCONN_SWAP_ACCEPT, 0);
1847 break;
1848 default:
1849 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1850 break;
1851 }
1852 break;
64f7c494
AT		 1853 case PD_CTRL_GET_SOURCE_CAP_EXT:
1854 case PD_CTRL_GET_STATUS:
1855 case PD_CTRL_FR_SWAP:
1856 case PD_CTRL_GET_PPS_STATUS:
1857 case PD_CTRL_GET_COUNTRY_CODES:
1858 /* Currently not supported */
1859 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1860 break;
f0690a25
GR		 1861 default:
1862 tcpm_log(port, "Unhandled ctrl message type %#x", type);
1863 break;
1864 }
1865}
1866
64f7c494
AT		 1867static void tcpm_pd_ext_msg_request(struct tcpm_port *port,
1868 const struct pd_message *msg)
1869{
1870 enum pd_ext_msg_type type = pd_header_type_le(msg->header);
1871 unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header);
1872
25242703 1873 if (!(msg->ext_msg.header & PD_EXT_HDR_CHUNKED)) {
64f7c494
AT		 1874 tcpm_log(port, "Unchunked extended messages unsupported");
1875 return;
1876 }
1877
1878 if (data_size > PD_EXT_MAX_CHUNK_DATA) {
1879 tcpm_log(port, "Chunk handling not yet supported");
1880 return;
1881 }
1882
1883 switch (type) {
1884 case PD_EXT_STATUS:
1885 /*
1886 * If PPS related events raised then get PPS status to clear
1887 * (see USB PD 3.0 Spec, 6.5.2.4)
1888 */
1889 if (msg->ext_msg.data[USB_PD_EXT_SDB_EVENT_FLAGS] &
1890 USB_PD_EXT_SDB_PPS_EVENTS)
1891 tcpm_set_state(port, GET_PPS_STATUS_SEND, 0);
1892 else
1893 tcpm_set_state(port, ready_state(port), 0);
1894 break;
1895 case PD_EXT_PPS_STATUS:
1896 /*
1897 * For now the PPS status message is used to clear events
1898 * and nothing more.
1899 */
1900 tcpm_set_state(port, ready_state(port), 0);
1901 break;
1902 case PD_EXT_SOURCE_CAP_EXT:
1903 case PD_EXT_GET_BATT_CAP:
1904 case PD_EXT_GET_BATT_STATUS:
1905 case PD_EXT_BATT_CAP:
1906 case PD_EXT_GET_MANUFACTURER_INFO:
1907 case PD_EXT_MANUFACTURER_INFO:
1908 case PD_EXT_SECURITY_REQUEST:
1909 case PD_EXT_SECURITY_RESPONSE:
1910 case PD_EXT_FW_UPDATE_REQUEST:
1911 case PD_EXT_FW_UPDATE_RESPONSE:
1912 case PD_EXT_COUNTRY_INFO:
1913 case PD_EXT_COUNTRY_CODES:
1914 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1915 break;
1916 default:
1917 tcpm_log(port, "Unhandled extended message type %#x", type);
1918 break;
1919 }
1920}
1921
f0690a25
GR		 1922static void tcpm_pd_rx_handler(struct work_struct *work)
1923{
1924 struct pd_rx_event *event = container_of(work,
1925 struct pd_rx_event, work);
1926 const struct pd_message *msg = &event->msg;
1927 unsigned int cnt = pd_header_cnt_le(msg->header);
1928 struct tcpm_port *port = event->port;
1929
1930 mutex_lock(&port->lock);
1931
1932 tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header),
1933 port->attached);
1934
1935 if (port->attached) {
5fec4b54
GR		 1936 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
1937 unsigned int msgid = pd_header_msgid_le(msg->header);
1938
1939 /*
1940 * USB PD standard, 6.6.1.2:
1941 * "... if MessageID value in a received Message is the
1942 * same as the stored value, the receiver shall return a
1943 * GoodCRC Message with that MessageID value and drop
1944 * the Message (this is a retry of an already received
1945 * Message). Note: this shall not apply to the Soft_Reset
1946 * Message which always has a MessageID value of zero."
1947 */
1948 if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET)
1949 goto done;
1950 port->rx_msgid = msgid;
1951
f0690a25
GR		 1952 /*
1953 * If both ends believe to be DFP/host, we have a data role
1954 * mismatch.
1955 */
1956 if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) ==
1957 (port->data_role == TYPEC_HOST)) {
1958 tcpm_log(port,
1959 "Data role mismatch, initiating error recovery");
1960 tcpm_set_state(port, ERROR_RECOVERY, 0);
1961 } else {
64f7c494
AT		 1962 if (msg->header & PD_HEADER_EXT_HDR)
1963 tcpm_pd_ext_msg_request(port, msg);
1964 else if (cnt)
f0690a25
GR		 1965 tcpm_pd_data_request(port, msg);
1966 else
1967 tcpm_pd_ctrl_request(port, msg);
1968 }
1969 }
1970
5fec4b54 1971done:
f0690a25
GR		 1972 mutex_unlock(&port->lock);
1973 kfree(event);
1974}
1975
1976void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg)
1977{
1978 struct pd_rx_event *event;
1979
1980 event = kzalloc(sizeof(*event), GFP_ATOMIC);
1981 if (!event)
1982 return;
1983
1984 INIT_WORK(&event->work, tcpm_pd_rx_handler);
1985 event->port = port;
1986 memcpy(&event->msg, msg, sizeof(*msg));
1987 queue_work(port->wq, &event->work);
1988}
1989EXPORT_SYMBOL_GPL(tcpm_pd_receive);
1990
1991static int tcpm_pd_send_control(struct tcpm_port *port,
1992 enum pd_ctrl_msg_type type)
1993{
1994 struct pd_message msg;
1995
1996 memset(&msg, 0, sizeof(msg));
1997 msg.header = PD_HEADER_LE(type, port->pwr_role,
1998 port->data_role,
2eadc33f 1999 port->negotiated_rev,
f0690a25
GR		 2000 port->message_id, 0);
2001
2002 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2003}
2004
2005/*
2006 * Send queued message without affecting state.
2007 * Return true if state machine should go back to sleep,
2008 * false otherwise.
2009 */
2010static bool tcpm_send_queued_message(struct tcpm_port *port)
2011{
2012 enum pd_msg_request queued_message;
2013
2014 do {
2015 queued_message = port->queued_message;
2016 port->queued_message = PD_MSG_NONE;
2017
2018 switch (queued_message) {
2019 case PD_MSG_CTRL_WAIT:
2020 tcpm_pd_send_control(port, PD_CTRL_WAIT);
2021 break;
2022 case PD_MSG_CTRL_REJECT:
2023 tcpm_pd_send_control(port, PD_CTRL_REJECT);
2024 break;
64f7c494
AT		 2025 case PD_MSG_CTRL_NOT_SUPP:
2026 tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP);
2027 break;
f0690a25
GR		 2028 case PD_MSG_DATA_SINK_CAP:
2029 tcpm_pd_send_sink_caps(port);
2030 break;
2031 case PD_MSG_DATA_SOURCE_CAP:
2032 tcpm_pd_send_source_caps(port);
2033 break;
2034 default:
2035 break;
2036 }
2037 } while (port->queued_message != PD_MSG_NONE);
2038
2039 if (port->delayed_state != INVALID_STATE) {
2040 if (time_is_after_jiffies(port->delayed_runtime)) {
2041 mod_delayed_work(port->wq, &port->state_machine,
2042 port->delayed_runtime - jiffies);
2043 return true;
2044 }
2045 port->delayed_state = INVALID_STATE;
2046 }
2047 return false;
2048}
2049
2050static int tcpm_pd_check_request(struct tcpm_port *port)
2051{
2052 u32 pdo, rdo = port->sink_request;
2053 unsigned int max, op, pdo_max, index;
2054 enum pd_pdo_type type;
2055
2056 index = rdo_index(rdo);
2057 if (!index || index > port->nr_src_pdo)
2058 return -EINVAL;
2059
2060 pdo = port->src_pdo[index - 1];
2061 type = pdo_type(pdo);
2062 switch (type) {
2063 case PDO_TYPE_FIXED:
2064 case PDO_TYPE_VAR:
2065 max = rdo_max_current(rdo);
2066 op = rdo_op_current(rdo);
2067 pdo_max = pdo_max_current(pdo);
2068
2069 if (op > pdo_max)
2070 return -EINVAL;
2071 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
2072 return -EINVAL;
2073
2074 if (type == PDO_TYPE_FIXED)
2075 tcpm_log(port,
2076 "Requested %u mV, %u mA for %u / %u mA",
2077 pdo_fixed_voltage(pdo), pdo_max, op, max);
2078 else
2079 tcpm_log(port,
2080 "Requested %u -> %u mV, %u mA for %u / %u mA",
2081 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
2082 pdo_max, op, max);
2083 break;
2084 case PDO_TYPE_BATT:
2085 max = rdo_max_power(rdo);
2086 op = rdo_op_power(rdo);
2087 pdo_max = pdo_max_power(pdo);
2088
2089 if (op > pdo_max)
2090 return -EINVAL;
2091 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
2092 return -EINVAL;
2093 tcpm_log(port,
2094 "Requested %u -> %u mV, %u mW for %u / %u mW",
2095 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
2096 pdo_max, op, max);
2097 break;
2098 default:
2099 return -EINVAL;
2100 }
2101
2102 port->op_vsafe5v = index == 1;
2103
2104 return 0;
2105}
2106
53fe0de9
LJ		 2107#define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y))
2108#define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y))
2109
2110static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo,
2111 int *src_pdo)
f0690a25 2112{
53fe0de9
LJ		 2113 unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0,
2114 max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0,
2115 min_snk_mv = 0;
f0690a25
GR		 2116 int ret = -EINVAL;
2117
2eadc33f 2118 port->pps_data.supported = false;
f2a8aa05 2119 port->usb_type = POWER_SUPPLY_USB_TYPE_PD;
2eadc33f 2120
f0690a25 2121 /*
53fe0de9
LJ		 2122 * Select the source PDO providing the most power which has a
2123 * matchig sink cap.
f0690a25
GR		 2124 */
2125 for (i = 0; i < port->nr_source_caps; i++) {
2126 u32 pdo = port->source_caps[i];
2127 enum pd_pdo_type type = pdo_type(pdo);
f0690a25 2128
2eadc33f
AT		 2129 switch (type) {
2130 case PDO_TYPE_FIXED:
53fe0de9
LJ		 2131 max_src_mv = pdo_fixed_voltage(pdo);
2132 min_src_mv = max_src_mv;
2eadc33f
AT		 2133 break;
2134 case PDO_TYPE_BATT:
2135 case PDO_TYPE_VAR:
53fe0de9
LJ		 2136 max_src_mv = pdo_max_voltage(pdo);
2137 min_src_mv = pdo_min_voltage(pdo);
2eadc33f
AT		 2138 break;
2139 case PDO_TYPE_APDO:
f2a8aa05 2140 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) {
2eadc33f 2141 port->pps_data.supported = true;
f2a8aa05
AT		 2142 port->usb_type =
2143 POWER_SUPPLY_USB_TYPE_PD_PPS;
2144 }
2eadc33f
AT		 2145 continue;
2146 default:
2147 tcpm_log(port, "Invalid source PDO type, ignoring");
2148 continue;
53fe0de9 2149 }
6f566af3 2150
2eadc33f
AT		 2151 switch (type) {
2152 case PDO_TYPE_FIXED:
2153 case PDO_TYPE_VAR:
53fe0de9
LJ		 2154 src_ma = pdo_max_current(pdo);
2155 src_mw = src_ma * min_src_mv / 1000;
2eadc33f
AT		 2156 break;
2157 case PDO_TYPE_BATT:
2158 src_mw = pdo_max_power(pdo);
2159 break;
2160 case PDO_TYPE_APDO:
2161 continue;
2162 default:
2163 tcpm_log(port, "Invalid source PDO type, ignoring");
2164 continue;
6f566af3
HG		 2165 }
2166
53fe0de9
LJ		 2167 for (j = 0; j < port->nr_snk_pdo; j++) {
2168 pdo = port->snk_pdo[j];
2169
2eadc33f
AT		 2170 switch (pdo_type(pdo)) {
2171 case PDO_TYPE_FIXED:
53fe0de9 2172 max_snk_mv = pdo_fixed_voltage(pdo);
2eadc33f
AT		 2173 min_snk_mv = max_snk_mv;
2174 break;
2175 case PDO_TYPE_BATT:
2176 case PDO_TYPE_VAR:
53fe0de9 2177 max_snk_mv = pdo_max_voltage(pdo);
2eadc33f
AT		 2178 min_snk_mv = pdo_min_voltage(pdo);
2179 break;
2180 case PDO_TYPE_APDO:
2181 continue;
2182 default:
2183 tcpm_log(port, "Invalid sink PDO type, ignoring");
2184 continue;
53fe0de9
LJ		 2185 }
2186
2187 if (max_src_mv <= max_snk_mv &&
2188 min_src_mv >= min_snk_mv) {
2189 /* Prefer higher voltages if available */
2190 if ((src_mw == max_mw && min_src_mv > max_mv) ||
2191 src_mw > max_mw) {
2192 *src_pdo = i;
2193 *sink_pdo = j;
2194 max_mw = src_mw;
2195 max_mv = min_src_mv;
2196 ret = 0;
2197 }
2198 }
f0690a25
GR		 2199 }
2200 }
2201
2202 return ret;
2203}
2204
2eadc33f
AT		 2205#define min_pps_apdo_current(x, y) \
2206 min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y))
2207
2208static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port)
2209{
2210 unsigned int i, j, max_mw = 0, max_mv = 0;
2211 unsigned int min_src_mv, max_src_mv, src_ma, src_mw;
2212 unsigned int min_snk_mv, max_snk_mv, snk_ma;
2213 u32 pdo;
2214 unsigned int src_pdo = 0, snk_pdo = 0;
2215
2216 /*
2217 * Select the source PPS APDO providing the most power while staying
2218 * within the board's limits. We skip the first PDO as this is always
2219 * 5V 3A.
2220 */
2221 for (i = 1; i < port->nr_source_caps; ++i) {
2222 pdo = port->source_caps[i];
2223
2224 switch (pdo_type(pdo)) {
2225 case PDO_TYPE_APDO:
2226 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2227 tcpm_log(port, "Not PPS APDO (source), ignoring");
2228 continue;
2229 }
2230
2231 min_src_mv = pdo_pps_apdo_min_voltage(pdo);
2232 max_src_mv = pdo_pps_apdo_max_voltage(pdo);
2233 src_ma = pdo_pps_apdo_max_current(pdo);
2234 src_mw = (src_ma * max_src_mv) / 1000;
2235
2236 /*
2237 * Now search through the sink PDOs to find a matching
2238 * PPS APDO. Again skip the first sink PDO as this will
2239 * always be 5V 3A.
2240 */
c413767e 2241 for (j = 1; j < port->nr_snk_pdo; j++) {
2eadc33f
AT		 2242 pdo = port->snk_pdo[j];
2243
2244 switch (pdo_type(pdo)) {
2245 case PDO_TYPE_APDO:
2246 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2247 tcpm_log(port,
2248 "Not PPS APDO (sink), ignoring");
2249 continue;
2250 }
2251
2252 min_snk_mv =
2253 pdo_pps_apdo_min_voltage(pdo);
2254 max_snk_mv =
2255 pdo_pps_apdo_max_voltage(pdo);
2256 snk_ma =
2257 pdo_pps_apdo_max_current(pdo);
2258 break;
2259 default:
2260 tcpm_log(port,
2261 "Not APDO type (sink), ignoring");
2262 continue;
2263 }
2264
2265 if (max_src_mv <= max_snk_mv &&
2266 min_src_mv >= min_snk_mv) {
2267 /* Prefer higher voltages if available */
2268 if ((src_mw == max_mw &&
2269 min_src_mv > max_mv) ||
2270 src_mw > max_mw) {
2271 src_pdo = i;
2272 snk_pdo = j;
2273 max_mw = src_mw;
2274 max_mv = max_src_mv;
2275 }
2276 }
2277 }
2278
2279 break;
2280 default:
2281 tcpm_log(port, "Not APDO type (source), ignoring");
2282 continue;
2283 }
2284 }
2285
2286 if (src_pdo) {
2287 pdo = port->source_caps[src_pdo];
2288
2289 port->pps_data.min_volt = pdo_pps_apdo_min_voltage(pdo);
2290 port->pps_data.max_volt = pdo_pps_apdo_max_voltage(pdo);
2291 port->pps_data.max_curr =
2292 min_pps_apdo_current(pdo, port->snk_pdo[snk_pdo]);
2293 port->pps_data.out_volt =
2294 min(pdo_pps_apdo_max_voltage(pdo), port->pps_data.out_volt);
2295 port->pps_data.op_curr =
2296 min(port->pps_data.max_curr, port->pps_data.op_curr);
2297 }
2298
2299 return src_pdo;
2300}
2301
f0690a25
GR		 2302static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo)
2303{
2304 unsigned int mv, ma, mw, flags;
2305 unsigned int max_ma, max_mw;
2306 enum pd_pdo_type type;
53fe0de9 2307 u32 pdo, matching_snk_pdo;
0c718676
GKH		 2308 int src_pdo_index = 0;
2309 int snk_pdo_index = 0;
53fe0de9 2310 int ret;
f0690a25 2311
53fe0de9
LJ		 2312 ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index);
2313 if (ret < 0)
2314 return ret;
2315
2316 pdo = port->source_caps[src_pdo_index];
2317 matching_snk_pdo = port->snk_pdo[snk_pdo_index];
f0690a25
GR		 2318 type = pdo_type(pdo);
2319
2eadc33f
AT		 2320 switch (type) {
2321 case PDO_TYPE_FIXED:
f0690a25 2322 mv = pdo_fixed_voltage(pdo);
2eadc33f
AT		 2323 break;
2324 case PDO_TYPE_BATT:
2325 case PDO_TYPE_VAR:
f0690a25 2326 mv = pdo_min_voltage(pdo);
2eadc33f
AT		 2327 break;
2328 default:
2329 tcpm_log(port, "Invalid PDO selected!");
2330 return -EINVAL;
2331 }
f0690a25 2332
53fe0de9 2333 /* Select maximum available current within the sink pdo's limit */
f0690a25 2334 if (type == PDO_TYPE_BATT) {
53fe0de9
LJ		 2335 mw = min_power(pdo, matching_snk_pdo);
2336 ma = 1000 * mw / mv;
f0690a25 2337 } else {
53fe0de9
LJ		 2338 ma = min_current(pdo, matching_snk_pdo);
2339 mw = ma * mv / 1000;
f0690a25 2340 }
f0690a25 2341
931693f9 2342 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
f0690a25
GR		 2343
2344 /* Set mismatch bit if offered power is less than operating power */
f0690a25
GR		 2345 max_ma = ma;
2346 max_mw = mw;
2347 if (mw < port->operating_snk_mw) {
2348 flags |= RDO_CAP_MISMATCH;
53fe0de9
LJ		 2349 if (type == PDO_TYPE_BATT &&
2350 (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo)))
2351 max_mw = pdo_max_power(matching_snk_pdo);
2352 else if (pdo_max_current(matching_snk_pdo) >
2353 pdo_max_current(pdo))
2354 max_ma = pdo_max_current(matching_snk_pdo);
f0690a25
GR		 2355 }
2356
2357 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
2358 port->cc_req, port->cc1, port->cc2, port->vbus_source,
2359 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
2360 port->polarity);
2361
2362 if (type == PDO_TYPE_BATT) {
53fe0de9 2363 *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags);
f0690a25
GR		 2364
2365 tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s",
53fe0de9 2366 src_pdo_index, mv, mw,
f0690a25
GR		 2367 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
2368 } else {
53fe0de9 2369 *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags);
f0690a25
GR		 2370
2371 tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s",
53fe0de9 2372 src_pdo_index, mv, ma,
f0690a25
GR		 2373 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
2374 }
2375
2376 port->current_limit = ma;
2377 port->supply_voltage = mv;
2378
2379 return 0;
2380}
2381
2382static int tcpm_pd_send_request(struct tcpm_port *port)
2383{
2384 struct pd_message msg;
2385 int ret;
2386 u32 rdo;
2387
2388 ret = tcpm_pd_build_request(port, &rdo);
2389 if (ret < 0)
2390 return ret;
2391
2392 memset(&msg, 0, sizeof(msg));
2393 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
2394 port->pwr_role,
2395 port->data_role,
2eadc33f
AT		 2396 port->negotiated_rev,
2397 port->message_id, 1);
2398 msg.payload[0] = cpu_to_le32(rdo);
2399
2400 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2401}
2402
2403static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo)
2404{
2405 unsigned int out_mv, op_ma, op_mw, min_mv, max_mv, max_ma, flags;
2406 enum pd_pdo_type type;
2407 unsigned int src_pdo_index;
2408 u32 pdo;
2409
2410 src_pdo_index = tcpm_pd_select_pps_apdo(port);
2411 if (!src_pdo_index)
2412 return -EOPNOTSUPP;
2413
2414 pdo = port->source_caps[src_pdo_index];
2415 type = pdo_type(pdo);
2416
2417 switch (type) {
2418 case PDO_TYPE_APDO:
2419 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2420 tcpm_log(port, "Invalid APDO selected!");
2421 return -EINVAL;
2422 }
2423 min_mv = port->pps_data.min_volt;
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);
3260 tcpm_set_roles(port, false, TYPEC_SOURCE, TYPEC_HOST);
3261 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
3262 break;
3263 case SRC_HARD_RESET_VBUS_ON:
3264 tcpm_set_vbus(port, true);
3265 port->tcpc->set_pd_rx(port->tcpc, true);
3266 tcpm_set_attached_state(port, true);
3267 tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON);
3268 break;
3269 case SNK_HARD_RESET_SINK_OFF:
2eadc33f 3270 memset(&port->pps_data, 0, sizeof(port->pps_data));
f0690a25
GR		 3271 tcpm_set_vconn(port, false);
3272 tcpm_set_charge(port, false);
3273 tcpm_set_roles(port, false, TYPEC_SINK, TYPEC_DEVICE);
3274 /*
3275 * VBUS may or may not toggle, depending on the adapter.
3276 * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON
3277 * directly after timeout.
3278 */
3279 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V);
3280 break;
3281 case SNK_HARD_RESET_WAIT_VBUS:
3282 /* Assume we're disconnected if VBUS doesn't come back. */
3283 tcpm_set_state(port, SNK_UNATTACHED,
3284 PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON);
3285 break;
3286 case SNK_HARD_RESET_SINK_ON:
3287 /* Note: There is no guarantee that VBUS is on in this state */
3288 /*
3289 * XXX:
3290 * The specification suggests that dual mode ports in sink
3291 * mode should transition to state PE_SRC_Transition_to_default.
3292 * See USB power delivery specification chapter 8.3.3.6.1.3.
3293 * This would mean to to
3294 * - turn off VCONN, reset power supply
3295 * - request hardware reset
3296 * - turn on VCONN
3297 * - Transition to state PE_Src_Startup
3298 * SNK only ports shall transition to state Snk_Startup
3299 * (see chapter 8.3.3.3.8).
3300 * Similar, dual-mode ports in source mode should transition
3301 * to PE_SNK_Transition_to_default.
3302 */
3303 tcpm_set_attached_state(port, true);
3304 tcpm_set_state(port, SNK_STARTUP, 0);
3305 break;
3306
3307 /* Soft_Reset states */
3308 case SOFT_RESET:
3309 port->message_id = 0;
5fec4b54 3310 port->rx_msgid = -1;
f0690a25
GR		 3311 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3312 if (port->pwr_role == TYPEC_SOURCE)
3313 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
3314 else
3315 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3316 break;
3317 case SOFT_RESET_SEND:
3318 port->message_id = 0;
5fec4b54 3319 port->rx_msgid = -1;
f0690a25
GR		 3320 if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET))
3321 tcpm_set_state_cond(port, hard_reset_state(port), 0);
3322 else
3323 tcpm_set_state_cond(port, hard_reset_state(port),
3324 PD_T_SENDER_RESPONSE);
3325 break;
3326
3327 /* DR_Swap states */
3328 case DR_SWAP_SEND:
3329 tcpm_pd_send_control(port, PD_CTRL_DR_SWAP);
3330 tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT,
3331 PD_T_SENDER_RESPONSE);
3332 break;
3333 case DR_SWAP_ACCEPT:
3334 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3335 tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0);
3336 break;
3337 case DR_SWAP_SEND_TIMEOUT:
3338 tcpm_swap_complete(port, -ETIMEDOUT);
3339 tcpm_set_state(port, ready_state(port), 0);
3340 break;
3341 case DR_SWAP_CHANGE_DR:
3342 if (port->data_role == TYPEC_HOST) {
3343 tcpm_unregister_altmodes(port);
3344 tcpm_set_roles(port, true, port->pwr_role,
3345 TYPEC_DEVICE);
3346 } else {
3347 tcpm_set_roles(port, true, port->pwr_role,
3348 TYPEC_HOST);
3349 port->send_discover = true;
3350 }
f0690a25
GR		 3351 tcpm_set_state(port, ready_state(port), 0);
3352 break;
3353
3354 /* PR_Swap states */
3355 case PR_SWAP_ACCEPT:
3356 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3357 tcpm_set_state(port, PR_SWAP_START, 0);
3358 break;
3359 case PR_SWAP_SEND:
3360 tcpm_pd_send_control(port, PD_CTRL_PR_SWAP);
3361 tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT,
3362 PD_T_SENDER_RESPONSE);
3363 break;
3364 case PR_SWAP_SEND_TIMEOUT:
3365 tcpm_swap_complete(port, -ETIMEDOUT);
3366 tcpm_set_state(port, ready_state(port), 0);
3367 break;
3368 case PR_SWAP_START:
3369 if (port->pwr_role == TYPEC_SOURCE)
3370 tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF,
3371 PD_T_SRC_TRANSITION);
3372 else
3373 tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0);
3374 break;
3375 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3376 tcpm_set_vbus(port, false);
3377 port->explicit_contract = false;
b965b631 3378 /* allow time for Vbus discharge, must be < tSrcSwapStdby */
f0690a25 3379 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF,
b965b631 3380 PD_T_SRCSWAPSTDBY);
f0690a25
GR		 3381 break;
3382 case PR_SWAP_SRC_SNK_SOURCE_OFF:
3383 tcpm_set_cc(port, TYPEC_CC_RD);
b965b631
BJS		 3384 /* allow CC debounce */
3385 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED,
3386 PD_T_CC_DEBOUNCE);
3387 break;
3388 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
050161ea
GR		 3389 /*
3390 * USB-PD standard, 6.2.1.4, Port Power Role:
3391 * "During the Power Role Swap Sequence, for the initial Source
3392 * Port, the Port Power Role field shall be set to Sink in the
3393 * PS_RDY Message indicating that the initial Source’s power
3394 * supply is turned off"
3395 */
3396 tcpm_set_pwr_role(port, TYPEC_SINK);
f0690a25
GR		 3397 if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
3398 tcpm_set_state(port, ERROR_RECOVERY, 0);
3399 break;
3400 }
3401 tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON);
3402 break;
3403 case PR_SWAP_SRC_SNK_SINK_ON:
f0690a25
GR		 3404 tcpm_set_state(port, SNK_STARTUP, 0);
3405 break;
3406 case PR_SWAP_SNK_SRC_SINK_OFF:
3407 tcpm_set_charge(port, false);
3408 tcpm_set_state(port, hard_reset_state(port),
3409 PD_T_PS_SOURCE_OFF);
3410 break;
3411 case PR_SWAP_SNK_SRC_SOURCE_ON:
3412 tcpm_set_cc(port, tcpm_rp_cc(port));
3413 tcpm_set_vbus(port, true);
b965b631
BJS		 3414 /*
3415 * allow time VBUS ramp-up, must be < tNewSrc
3416 * Also, this window overlaps with CC debounce as well.
3417 * So, Wait for the max of two which is PD_T_NEWSRC
3418 */
3419 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP,
3420 PD_T_NEWSRC);
3421 break;
3422 case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP:
050161ea
GR		 3423 /*
3424 * USB PD standard, 6.2.1.4:
3425 * "Subsequent Messages initiated by the Policy Engine,
3426 * such as the PS_RDY Message sent to indicate that Vbus
3427 * is ready, will have the Port Power Role field set to
3428 * Source."
3429 */
f0690a25 3430 tcpm_set_pwr_role(port, TYPEC_SOURCE);
050161ea 3431 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
f0690a25
GR		 3432 tcpm_set_state(port, SRC_STARTUP, 0);
3433 break;
3434
3435 case VCONN_SWAP_ACCEPT:
3436 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3437 tcpm_set_state(port, VCONN_SWAP_START, 0);
3438 break;
3439 case VCONN_SWAP_SEND:
3440 tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP);
3441 tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT,
3442 PD_T_SENDER_RESPONSE);
3443 break;
3444 case VCONN_SWAP_SEND_TIMEOUT:
3445 tcpm_swap_complete(port, -ETIMEDOUT);
3446 tcpm_set_state(port, ready_state(port), 0);
3447 break;
3448 case VCONN_SWAP_START:
3449 if (port->vconn_role == TYPEC_SOURCE)
3450 tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0);
3451 else
3452 tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0);
3453 break;
3454 case VCONN_SWAP_WAIT_FOR_VCONN:
3455 tcpm_set_state(port, hard_reset_state(port),
3456 PD_T_VCONN_SOURCE_ON);
3457 break;
3458 case VCONN_SWAP_TURN_ON_VCONN:
3459 tcpm_set_vconn(port, true);
3460 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
f0690a25
GR		 3461 tcpm_set_state(port, ready_state(port), 0);
3462 break;
3463 case VCONN_SWAP_TURN_OFF_VCONN:
3464 tcpm_set_vconn(port, false);
f0690a25
GR		 3465 tcpm_set_state(port, ready_state(port), 0);
3466 break;
3467
3468 case DR_SWAP_CANCEL:
3469 case PR_SWAP_CANCEL:
3470 case VCONN_SWAP_CANCEL:
3471 tcpm_swap_complete(port, port->swap_status);
3472 if (port->pwr_role == TYPEC_SOURCE)
3473 tcpm_set_state(port, SRC_READY, 0);
3474 else
3475 tcpm_set_state(port, SNK_READY, 0);
3476 break;
3477
3478 case BIST_RX:
3479 switch (BDO_MODE_MASK(port->bist_request)) {
3480 case BDO_MODE_CARRIER2:
3481 tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
3482 break;
3483 default:
3484 break;
3485 }
3486 /* Always switch to unattached state */
3487 tcpm_set_state(port, unattached_state(port), 0);
3488 break;
64f7c494
AT		 3489 case GET_STATUS_SEND:
3490 tcpm_pd_send_control(port, PD_CTRL_GET_STATUS);
3491 tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT,
3492 PD_T_SENDER_RESPONSE);
3493 break;
3494 case GET_STATUS_SEND_TIMEOUT:
3495 tcpm_set_state(port, ready_state(port), 0);
3496 break;
3497 case GET_PPS_STATUS_SEND:
3498 tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS);
3499 tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT,
3500 PD_T_SENDER_RESPONSE);
3501 break;
3502 case GET_PPS_STATUS_SEND_TIMEOUT:
3503 tcpm_set_state(port, ready_state(port), 0);
3504 break;
f0690a25
GR		 3505 case ERROR_RECOVERY:
3506 tcpm_swap_complete(port, -EPROTO);
2eadc33f 3507 tcpm_pps_complete(port, -EPROTO);
b17dd571
GR		 3508 tcpm_set_state(port, PORT_RESET, 0);
3509 break;
3510 case PORT_RESET:
f0690a25 3511 tcpm_reset_port(port);
f0690a25 3512 tcpm_set_cc(port, TYPEC_CC_OPEN);
b17dd571 3513 tcpm_set_state(port, PORT_RESET_WAIT_OFF,
f0690a25
GR		 3514 PD_T_ERROR_RECOVERY);
3515 break;
b17dd571 3516 case PORT_RESET_WAIT_OFF:
f0690a25
GR		 3517 tcpm_set_state(port,
3518 tcpm_default_state(port),
3519 port->vbus_present ? PD_T_PS_SOURCE_OFF : 0);
3520 break;
3521 default:
3522 WARN(1, "Unexpected port state %d\n", port->state);
3523 break;
3524 }
3525}
3526
3527static void tcpm_state_machine_work(struct work_struct *work)
3528{
3529 struct tcpm_port *port = container_of(work, struct tcpm_port,
3530 state_machine.work);
3531 enum tcpm_state prev_state;
3532
3533 mutex_lock(&port->lock);
3534 port->state_machine_running = true;
3535
3536 if (port->queued_message && tcpm_send_queued_message(port))
3537 goto done;
3538
3539 /* If we were queued due to a delayed state change, update it now */
3540 if (port->delayed_state) {
3541 tcpm_log(port, "state change %s -> %s [delayed %ld ms]",
3542 tcpm_states[port->state],
3543 tcpm_states[port->delayed_state], port->delay_ms);
3544 port->prev_state = port->state;
3545 port->state = port->delayed_state;
3546 port->delayed_state = INVALID_STATE;
3547 }
3548
3549 /*
3550 * Continue running as long as we have (non-delayed) state changes
3551 * to make.
3552 */
3553 do {
3554 prev_state = port->state;
3555 run_state_machine(port);
3556 if (port->queued_message)
3557 tcpm_send_queued_message(port);
3558 } while (port->state != prev_state && !port->delayed_state);
3559
3560done:
3561 port->state_machine_running = false;
3562 mutex_unlock(&port->lock);
3563}
3564
3565static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
3566 enum typec_cc_status cc2)
3567{
3568 enum typec_cc_status old_cc1, old_cc2;
3569 enum tcpm_state new_state;
3570
3571 old_cc1 = port->cc1;
3572 old_cc2 = port->cc2;
3573 port->cc1 = cc1;
3574 port->cc2 = cc2;
3575
3576 tcpm_log_force(port,
3577 "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]",
3578 old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state],
3579 port->polarity,
3580 tcpm_port_is_disconnected(port) ? "disconnected"
3581 : "connected");
3582
3583 switch (port->state) {
3584 case DRP_TOGGLING:
3585 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
3586 tcpm_port_is_source(port))
3587 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3588 else if (tcpm_port_is_sink(port))
3589 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3590 break;
3591 case SRC_UNATTACHED:
3592 case ACC_UNATTACHED:
3593 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
3594 tcpm_port_is_source(port))
3595 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3596 break;
3597 case SRC_ATTACH_WAIT:
3598 if (tcpm_port_is_disconnected(port) ||
3599 tcpm_port_is_audio_detached(port))
3600 tcpm_set_state(port, SRC_UNATTACHED, 0);
3601 else if (cc1 != old_cc1 || cc2 != old_cc2)
3602 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3603 break;
3604 case SRC_ATTACHED:
f3b73364
BJS		 3605 case SRC_SEND_CAPABILITIES:
3606 case SRC_READY:
3607 if (tcpm_port_is_disconnected(port) ||
3608 !tcpm_port_is_source(port))
f0690a25
GR		 3609 tcpm_set_state(port, SRC_UNATTACHED, 0);
3610 break;
f0690a25
GR		 3611 case SNK_UNATTACHED:
3612 if (tcpm_port_is_sink(port))
3613 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3614 break;
3615 case SNK_ATTACH_WAIT:
3616 if ((port->cc1 == TYPEC_CC_OPEN &&
3617 port->cc2 != TYPEC_CC_OPEN) ||
3618 (port->cc1 != TYPEC_CC_OPEN &&
3619 port->cc2 == TYPEC_CC_OPEN))
3620 new_state = SNK_DEBOUNCED;
3621 else if (tcpm_port_is_disconnected(port))
3622 new_state = SNK_UNATTACHED;
3623 else
3624 break;
3625 if (new_state != port->delayed_state)
3626 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3627 break;
3628 case SNK_DEBOUNCED:
3629 if (tcpm_port_is_disconnected(port))
3630 new_state = SNK_UNATTACHED;
3631 else if (port->vbus_present)
3632 new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED;
3633 else
3634 new_state = SNK_UNATTACHED;
3635 if (new_state != port->delayed_state)
3636 tcpm_set_state(port, SNK_DEBOUNCED, 0);
3637 break;
3638 case SNK_READY:
3639 if (tcpm_port_is_disconnected(port))
3640 tcpm_set_state(port, unattached_state(port), 0);
3641 else if (!port->pd_capable &&
3642 (cc1 != old_cc1 || cc2 != old_cc2))
3643 tcpm_set_current_limit(port,
3644 tcpm_get_current_limit(port),
3645 5000);
3646 break;
3647
3648 case AUDIO_ACC_ATTACHED:
3649 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
3650 tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0);
3651 break;
3652 case AUDIO_ACC_DEBOUNCE:
3653 if (tcpm_port_is_audio(port))
3654 tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0);
3655 break;
3656
3657 case DEBUG_ACC_ATTACHED:
3658 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
3659 tcpm_set_state(port, ACC_UNATTACHED, 0);
3660 break;
3661
3662 case SNK_TRY:
3663 /* Do nothing, waiting for timeout */
3664 break;
3665
3666 case SNK_DISCOVERY:
3667 /* CC line is unstable, wait for debounce */
3668 if (tcpm_port_is_disconnected(port))
3669 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0);
3670 break;
3671 case SNK_DISCOVERY_DEBOUNCE:
3672 break;
3673
3674 case SRC_TRYWAIT:
3675 /* Hand over to state machine if needed */
3676 if (!port->vbus_present && tcpm_port_is_source(port))
02d5be46
BJS		 3677 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
3678 break;
3679 case SRC_TRYWAIT_DEBOUNCE:
3680 if (port->vbus_present || !tcpm_port_is_source(port))
f0690a25
GR		 3681 tcpm_set_state(port, SRC_TRYWAIT, 0);
3682 break;
a0a3e04e
BJS		 3683 case SNK_TRY_WAIT_DEBOUNCE:
3684 if (!tcpm_port_is_sink(port)) {
3685 port->max_wait = 0;
3686 tcpm_set_state(port, SRC_TRYWAIT, 0);
f0690a25 3687 }
f0690a25 3688 break;
131c7d12 3689 case SRC_TRY_WAIT:
c79d92bd
BJS		 3690 if (tcpm_port_is_source(port))
3691 tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0);
f0690a25
GR		 3692 break;
3693 case SRC_TRY_DEBOUNCE:
131c7d12 3694 tcpm_set_state(port, SRC_TRY_WAIT, 0);
f0690a25
GR		 3695 break;
3696 case SNK_TRYWAIT_DEBOUNCE:
af450ebb
BJS		 3697 if (tcpm_port_is_sink(port))
3698 tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0);
3699 break;
3700 case SNK_TRYWAIT_VBUS:
3701 if (!tcpm_port_is_sink(port))
f0690a25
GR		 3702 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
3703 break;
af450ebb
BJS		 3704 case SNK_TRYWAIT:
3705 /* Do nothing, waiting for tCCDebounce */
3706 break;
f0690a25
GR		 3707 case PR_SWAP_SNK_SRC_SINK_OFF:
3708 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3709 case PR_SWAP_SRC_SNK_SOURCE_OFF:
b965b631
BJS		 3710 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
3711 case PR_SWAP_SNK_SRC_SOURCE_ON:
f0690a25 3712 /*
b965b631 3713 * CC state change is expected in PR_SWAP
f0690a25
GR		 3714 * Ignore it.
3715 */
3716 break;
3717
3718 default:
3719 if (tcpm_port_is_disconnected(port))
3720 tcpm_set_state(port, unattached_state(port), 0);
3721 break;
3722 }
3723}
3724
3725static void _tcpm_pd_vbus_on(struct tcpm_port *port)
3726{
f0690a25
GR		 3727 tcpm_log_force(port, "VBUS on");
3728 port->vbus_present = true;
3729 switch (port->state) {
3730 case SNK_TRANSITION_SINK_VBUS:
8bf05746 3731 port->explicit_contract = true;
f0690a25
GR		 3732 tcpm_set_state(port, SNK_READY, 0);
3733 break;
3734 case SNK_DISCOVERY:
3735 tcpm_set_state(port, SNK_DISCOVERY, 0);
3736 break;
3737
3738 case SNK_DEBOUNCED:
3739 tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY
3740 : SNK_ATTACHED,
3741 0);
3742 break;
3743 case SNK_HARD_RESET_WAIT_VBUS:
3744 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0);
3745 break;
3746 case SRC_ATTACHED:
3747 tcpm_set_state(port, SRC_STARTUP, 0);
3748 break;
3749 case SRC_HARD_RESET_VBUS_ON:
3750 tcpm_set_state(port, SRC_STARTUP, 0);
3751 break;
3752
3753 case SNK_TRY:
3754 /* Do nothing, waiting for timeout */
3755 break;
3756 case SRC_TRYWAIT:
02d5be46
BJS		 3757 /* Do nothing, Waiting for Rd to be detected */
3758 break;
3759 case SRC_TRYWAIT_DEBOUNCE:
3760 tcpm_set_state(port, SRC_TRYWAIT, 0);
f0690a25 3761 break;
a0a3e04e
BJS		 3762 case SNK_TRY_WAIT_DEBOUNCE:
3763 /* Do nothing, waiting for PD_DEBOUNCE to do be done */
f0690a25
GR		 3764 break;
3765 case SNK_TRYWAIT:
af450ebb
BJS		 3766 /* Do nothing, waiting for tCCDebounce */
3767 break;
3768 case SNK_TRYWAIT_VBUS:
3769 if (tcpm_port_is_sink(port))
3770 tcpm_set_state(port, SNK_ATTACHED, 0);
3771 break;
3772 case SNK_TRYWAIT_DEBOUNCE:
3773 /* Do nothing, waiting for Rp */
f0690a25 3774 break;
131c7d12
BJS		 3775 case SRC_TRY_WAIT:
3776 case SRC_TRY_DEBOUNCE:
3777 /* Do nothing, waiting for sink detection */
3778 break;
f0690a25
GR		 3779 default:
3780 break;
3781 }
3782}
3783
3784static void _tcpm_pd_vbus_off(struct tcpm_port *port)
3785{
f0690a25
GR		 3786 tcpm_log_force(port, "VBUS off");
3787 port->vbus_present = false;
3788 port->vbus_never_low = false;
3789 switch (port->state) {
3790 case SNK_HARD_RESET_SINK_OFF:
3791 tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0);
3792 break;
3793 case SRC_HARD_RESET_VBUS_OFF:
3794 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, 0);
3795 break;
3796 case HARD_RESET_SEND:
3797 break;
3798
3799 case SNK_TRY:
3800 /* Do nothing, waiting for timeout */
3801 break;
3802 case SRC_TRYWAIT:
3803 /* Hand over to state machine if needed */
3804 if (tcpm_port_is_source(port))
02d5be46 3805 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
f0690a25 3806 break;
a0a3e04e
BJS		 3807 case SNK_TRY_WAIT_DEBOUNCE:
3808 /* Do nothing, waiting for PD_DEBOUNCE to do be done */
f0690a25 3809 break;
af450ebb 3810 case SNK_TRYWAIT:
f0690a25 3811 case SNK_TRYWAIT_VBUS:
af450ebb 3812 case SNK_TRYWAIT_DEBOUNCE:
f0690a25 3813 break;
f0690a25
GR		 3814 case SNK_ATTACH_WAIT:
3815 tcpm_set_state(port, SNK_UNATTACHED, 0);
3816 break;
3817
3818 case SNK_NEGOTIATE_CAPABILITIES:
3819 break;
3820
3821 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3822 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0);
3823 break;
3824
3825 case PR_SWAP_SNK_SRC_SINK_OFF:
3826 /* Do nothing, expected */
3827 break;
3828
b17dd571 3829 case PORT_RESET_WAIT_OFF:
c749d4d0 3830 tcpm_set_state(port, tcpm_default_state(port), 0);
f0690a25 3831 break;
131c7d12
BJS		 3832 case SRC_TRY_WAIT:
3833 case SRC_TRY_DEBOUNCE:
3834 /* Do nothing, waiting for sink detection */
3835 break;
f0690a25
GR		 3836 default:
3837 if (port->pwr_role == TYPEC_SINK &&
3838 port->attached)
3839 tcpm_set_state(port, SNK_UNATTACHED, 0);
3840 break;
3841 }
3842}
3843
3844static void _tcpm_pd_hard_reset(struct tcpm_port *port)
3845{
3846 tcpm_log_force(port, "Received hard reset");
3847 /*
3848 * If we keep receiving hard reset requests, executing the hard reset
3849 * must have failed. Revert to error recovery if that happens.
3850 */
3851 tcpm_set_state(port,
3852 port->hard_reset_count < PD_N_HARD_RESET_COUNT ?
3853 HARD_RESET_START : ERROR_RECOVERY,
3854 0);
3855}
3856
3857static void tcpm_pd_event_handler(struct work_struct *work)
3858{
3859 struct tcpm_port *port = container_of(work, struct tcpm_port,
3860 event_work);
3861 u32 events;
3862
3863 mutex_lock(&port->lock);
3864
3865 spin_lock(&port->pd_event_lock);
3866 while (port->pd_events) {
3867 events = port->pd_events;
3868 port->pd_events = 0;
3869 spin_unlock(&port->pd_event_lock);
3870 if (events & TCPM_RESET_EVENT)
3871 _tcpm_pd_hard_reset(port);
3872 if (events & TCPM_VBUS_EVENT) {
3873 bool vbus;
3874
3875 vbus = port->tcpc->get_vbus(port->tcpc);
3876 if (vbus)
3877 _tcpm_pd_vbus_on(port);
3878 else
3879 _tcpm_pd_vbus_off(port);
3880 }
3881 if (events & TCPM_CC_EVENT) {
3882 enum typec_cc_status cc1, cc2;
3883
3884 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
3885 _tcpm_cc_change(port, cc1, cc2);
3886 }
3887 spin_lock(&port->pd_event_lock);
3888 }
3889 spin_unlock(&port->pd_event_lock);
3890 mutex_unlock(&port->lock);
3891}
3892
3893void tcpm_cc_change(struct tcpm_port *port)
3894{
3895 spin_lock(&port->pd_event_lock);
3896 port->pd_events |= TCPM_CC_EVENT;
3897 spin_unlock(&port->pd_event_lock);
3898 queue_work(port->wq, &port->event_work);
3899}
3900EXPORT_SYMBOL_GPL(tcpm_cc_change);
3901
3902void tcpm_vbus_change(struct tcpm_port *port)
3903{
3904 spin_lock(&port->pd_event_lock);
3905 port->pd_events |= TCPM_VBUS_EVENT;
3906 spin_unlock(&port->pd_event_lock);
3907 queue_work(port->wq, &port->event_work);
3908}
3909EXPORT_SYMBOL_GPL(tcpm_vbus_change);
3910
3911void tcpm_pd_hard_reset(struct tcpm_port *port)
3912{
3913 spin_lock(&port->pd_event_lock);
3914 port->pd_events = TCPM_RESET_EVENT;
3915 spin_unlock(&port->pd_event_lock);
3916 queue_work(port->wq, &port->event_work);
3917}
3918EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
3919
3920static int tcpm_dr_set(const struct typec_capability *cap,
3921 enum typec_data_role data)
3922{
3923 struct tcpm_port *port = typec_cap_to_tcpm(cap);
3924 int ret;
3925
3926 mutex_lock(&port->swap_lock);
3927 mutex_lock(&port->lock);
3928
9b0ae699 3929 if (port->port_type != TYPEC_PORT_DRP) {
f0690a25
GR		 3930 ret = -EINVAL;
3931 goto port_unlock;
3932 }
3933 if (port->state != SRC_READY && port->state != SNK_READY) {
3934 ret = -EAGAIN;
3935 goto port_unlock;
3936 }
3937
3938 if (port->data_role == data) {
3939 ret = 0;
3940 goto port_unlock;
3941 }
3942
3943 /*
3944 * XXX
3945 * 6.3.9: If an alternate mode is active, a request to swap
3946 * alternate modes shall trigger a port reset.
3947 * Reject data role swap request in this case.
3948 */
3949
b17dd571
GR		 3950 if (!port->pd_capable) {
3951 /*
3952 * If the partner is not PD capable, reset the port to
3953 * trigger a role change. This can only work if a preferred
3954 * role is configured, and if it matches the requested role.
3955 */
3956 if (port->try_role == TYPEC_NO_PREFERRED_ROLE ||
3957 port->try_role == port->pwr_role) {
3958 ret = -EINVAL;
3959 goto port_unlock;
3960 }
3961 port->non_pd_role_swap = true;
3962 tcpm_set_state(port, PORT_RESET, 0);
3963 } else {
3964 tcpm_set_state(port, DR_SWAP_SEND, 0);
3965 }
3966
f0690a25
GR		 3967 port->swap_status = 0;
3968 port->swap_pending = true;
3969 reinit_completion(&port->swap_complete);
f0690a25
GR		 3970 mutex_unlock(&port->lock);
3971
9adf9f9e
GR		 3972 if (!wait_for_completion_timeout(&port->swap_complete,
3973 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
3974 ret = -ETIMEDOUT;
3975 else
3976 ret = port->swap_status;
f0690a25 3977
b17dd571 3978 port->non_pd_role_swap = false;
f0690a25
GR		 3979 goto swap_unlock;
3980
3981port_unlock:
3982 mutex_unlock(&port->lock);
3983swap_unlock:
3984 mutex_unlock(&port->swap_lock);
3985 return ret;
3986}
3987
3988static int tcpm_pr_set(const struct typec_capability *cap,
3989 enum typec_role role)
3990{
3991 struct tcpm_port *port = typec_cap_to_tcpm(cap);
3992 int ret;
3993
3994 mutex_lock(&port->swap_lock);
3995 mutex_lock(&port->lock);
3996
9b0ae699 3997 if (port->port_type != TYPEC_PORT_DRP) {
f0690a25
GR		 3998 ret = -EINVAL;
3999 goto port_unlock;
4000 }
4001 if (port->state != SRC_READY && port->state != SNK_READY) {
4002 ret = -EAGAIN;
4003 goto port_unlock;
4004 }
4005
4006 if (role == port->pwr_role) {
4007 ret = 0;
4008 goto port_unlock;
4009 }
4010
f0690a25
GR		 4011 port->swap_status = 0;
4012 port->swap_pending = true;
4013 reinit_completion(&port->swap_complete);
4014 tcpm_set_state(port, PR_SWAP_SEND, 0);
4015 mutex_unlock(&port->lock);
4016
9adf9f9e
GR		 4017 if (!wait_for_completion_timeout(&port->swap_complete,
4018 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4019 ret = -ETIMEDOUT;
4020 else
4021 ret = port->swap_status;
f0690a25 4022
f0690a25
GR		 4023 goto swap_unlock;
4024
4025port_unlock:
4026 mutex_unlock(&port->lock);
4027swap_unlock:
4028 mutex_unlock(&port->swap_lock);
4029 return ret;
4030}
4031
4032static int tcpm_vconn_set(const struct typec_capability *cap,
4033 enum typec_role role)
4034{
4035 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4036 int ret;
4037
4038 mutex_lock(&port->swap_lock);
4039 mutex_lock(&port->lock);
4040
4041 if (port->state != SRC_READY && port->state != SNK_READY) {
4042 ret = -EAGAIN;
4043 goto port_unlock;
4044 }
4045
4046 if (role == port->vconn_role) {
4047 ret = 0;
4048 goto port_unlock;
4049 }
4050
4051 port->swap_status = 0;
4052 port->swap_pending = true;
4053 reinit_completion(&port->swap_complete);
4054 tcpm_set_state(port, VCONN_SWAP_SEND, 0);
4055 mutex_unlock(&port->lock);
4056
9adf9f9e
GR		 4057 if (!wait_for_completion_timeout(&port->swap_complete,
4058 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4059 ret = -ETIMEDOUT;
4060 else
4061 ret = port->swap_status;
f0690a25 4062
f0690a25
GR		 4063 goto swap_unlock;
4064
4065port_unlock:
4066 mutex_unlock(&port->lock);
4067swap_unlock:
4068 mutex_unlock(&port->swap_lock);
4069 return ret;
4070}
4071
4072static int tcpm_try_role(const struct typec_capability *cap, int role)
4073{
4074 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4075 struct tcpc_dev *tcpc = port->tcpc;
4076 int ret = 0;
4077
4078 mutex_lock(&port->lock);
4079 if (tcpc->try_role)
4080 ret = tcpc->try_role(tcpc, role);
4081 if (!ret && !tcpc->config->try_role_hw)
4082 port->try_role = role;
4083 port->try_src_count = 0;
4084 port->try_snk_count = 0;
4085 mutex_unlock(&port->lock);
4086
4087 return ret;
4088}
4089
f2a8aa05 4090static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr)
2eadc33f
AT		 4091{
4092 unsigned int target_mw;
4093 int ret;
4094
4095 mutex_lock(&port->swap_lock);
4096 mutex_lock(&port->lock);
4097
4098 if (!port->pps_data.active) {
4099 ret = -EOPNOTSUPP;
4100 goto port_unlock;
4101 }
4102
4103 if (port->state != SNK_READY) {
4104 ret = -EAGAIN;
4105 goto port_unlock;
4106 }
4107
4108 if (op_curr > port->pps_data.max_curr) {
4109 ret = -EINVAL;
4110 goto port_unlock;
4111 }
4112
4113 target_mw = (op_curr * port->pps_data.out_volt) / 1000;
4114 if (target_mw < port->operating_snk_mw) {
4115 ret = -EINVAL;
4116 goto port_unlock;
4117 }
4118
4119 reinit_completion(&port->pps_complete);
4120 port->pps_data.op_curr = op_curr;
4121 port->pps_status = 0;
4122 port->pps_pending = true;
4123 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4124 mutex_unlock(&port->lock);
4125
4126 if (!wait_for_completion_timeout(&port->pps_complete,
4127 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4128 ret = -ETIMEDOUT;
4129 else
4130 ret = port->pps_status;
4131
4132 goto swap_unlock;
4133
4134port_unlock:
4135 mutex_unlock(&port->lock);
4136swap_unlock:
4137 mutex_unlock(&port->swap_lock);
4138
4139 return ret;
4140}
4141
f2a8aa05 4142static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt)
2eadc33f
AT		 4143{
4144 unsigned int target_mw;
4145 int ret;
4146
4147 mutex_lock(&port->swap_lock);
4148 mutex_lock(&port->lock);
4149
4150 if (!port->pps_data.active) {
4151 ret = -EOPNOTSUPP;
4152 goto port_unlock;
4153 }
4154
4155 if (port->state != SNK_READY) {
4156 ret = -EAGAIN;
4157 goto port_unlock;
4158 }
4159
4160 if (out_volt < port->pps_data.min_volt ||
4161 out_volt > port->pps_data.max_volt) {
4162 ret = -EINVAL;
4163 goto port_unlock;
4164 }
4165
4166 target_mw = (port->pps_data.op_curr * out_volt) / 1000;
4167 if (target_mw < port->operating_snk_mw) {
4168 ret = -EINVAL;
4169 goto port_unlock;
4170 }
4171
4172 reinit_completion(&port->pps_complete);
4173 port->pps_data.out_volt = out_volt;
4174 port->pps_status = 0;
4175 port->pps_pending = true;
4176 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4177 mutex_unlock(&port->lock);
4178
4179 if (!wait_for_completion_timeout(&port->pps_complete,
4180 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4181 ret = -ETIMEDOUT;
4182 else
4183 ret = port->pps_status;
4184
4185 goto swap_unlock;
4186
4187port_unlock:
4188 mutex_unlock(&port->lock);
4189swap_unlock:
4190 mutex_unlock(&port->swap_lock);
4191
4192 return ret;
4193}
4194
f2a8aa05 4195static int tcpm_pps_activate(struct tcpm_port *port, bool activate)
2eadc33f
AT		 4196{
4197 int ret = 0;
4198
4199 mutex_lock(&port->swap_lock);
4200 mutex_lock(&port->lock);
4201
4202 if (!port->pps_data.supported) {
4203 ret = -EOPNOTSUPP;
4204 goto port_unlock;
4205 }
4206
4207 /* Trying to deactivate PPS when already deactivated so just bail */
4208 if (!port->pps_data.active && !activate)
4209 goto port_unlock;
4210
4211 if (port->state != SNK_READY) {
4212 ret = -EAGAIN;
4213 goto port_unlock;
4214 }
4215
4216 reinit_completion(&port->pps_complete);
4217 port->pps_status = 0;
4218 port->pps_pending = true;
4219
4220 /* Trigger PPS request or move back to standard PDO contract */
4221 if (activate) {
4222 port->pps_data.out_volt = port->supply_voltage;
4223 port->pps_data.op_curr = port->current_limit;
4224 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4225 } else {
4226 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
4227 }
4228 mutex_unlock(&port->lock);
4229
4230 if (!wait_for_completion_timeout(&port->pps_complete,
4231 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4232 ret = -ETIMEDOUT;
4233 else
4234 ret = port->pps_status;
4235
4236 goto swap_unlock;
4237
4238port_unlock:
4239 mutex_unlock(&port->lock);
4240swap_unlock:
4241 mutex_unlock(&port->swap_lock);
4242
4243 return ret;
4244}
4245
f0690a25
GR		 4246static void tcpm_init(struct tcpm_port *port)
4247{
4248 enum typec_cc_status cc1, cc2;
4249
4250 port->tcpc->init(port->tcpc);
4251
4252 tcpm_reset_port(port);
4253
4254 /*
4255 * XXX
4256 * Should possibly wait for VBUS to settle if it was enabled locally
4257 * since tcpm_reset_port() will disable VBUS.
4258 */
4259 port->vbus_present = port->tcpc->get_vbus(port->tcpc);
4260 if (port->vbus_present)
4261 port->vbus_never_low = true;
4262
4263 tcpm_set_state(port, tcpm_default_state(port), 0);
4264
4265 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
4266 _tcpm_cc_change(port, cc1, cc2);
4267
4268 /*
4269 * Some adapters need a clean slate at startup, and won't recover
4270 * otherwise. So do not try to be fancy and force a clean disconnect.
4271 */
b17dd571 4272 tcpm_set_state(port, PORT_RESET, 0);
f0690a25
GR		 4273}
4274
9b0ae699
BJS		 4275static int tcpm_port_type_set(const struct typec_capability *cap,
4276 enum typec_port_type type)
4277{
4278 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4279
4280 mutex_lock(&port->lock);
4281 if (type == port->port_type)
4282 goto port_unlock;
4283
4284 port->port_type = type;
4285
4286 if (!port->connected) {
4287 tcpm_set_state(port, PORT_RESET, 0);
ceeb1625 4288 } else if (type == TYPEC_PORT_SNK) {
9b0ae699
BJS		 4289 if (!(port->pwr_role == TYPEC_SINK &&
4290 port->data_role == TYPEC_DEVICE))
4291 tcpm_set_state(port, PORT_RESET, 0);
ceeb1625 4292 } else if (type == TYPEC_PORT_SRC) {
9b0ae699
BJS		 4293 if (!(port->pwr_role == TYPEC_SOURCE &&
4294 port->data_role == TYPEC_HOST))
4295 tcpm_set_state(port, PORT_RESET, 0);
4296 }
4297
4298port_unlock:
4299 mutex_unlock(&port->lock);
4300 return 0;
4301}
4302
f0690a25
GR		 4303void tcpm_tcpc_reset(struct tcpm_port *port)
4304{
4305 mutex_lock(&port->lock);
4306 /* XXX: Maintain PD connection if possible? */
4307 tcpm_init(port);
4308 mutex_unlock(&port->lock);
4309}
4310EXPORT_SYMBOL_GPL(tcpm_tcpc_reset);
4311
4312static int tcpm_copy_pdos(u32 *dest_pdo, const u32 *src_pdo,
4313 unsigned int nr_pdo)
4314{
4315 unsigned int i;
4316
4317 if (nr_pdo > PDO_MAX_OBJECTS)
4318 nr_pdo = PDO_MAX_OBJECTS;
4319
4320 for (i = 0; i < nr_pdo; i++)
4321 dest_pdo[i] = src_pdo[i];
4322
4323 return nr_pdo;
4324}
4325
193a6801
GR		 4326static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo,
4327 unsigned int nr_vdo)
4328{
4329 unsigned int i;
4330
4331 if (nr_vdo > VDO_MAX_OBJECTS)
4332 nr_vdo = VDO_MAX_OBJECTS;
4333
4334 for (i = 0; i < nr_vdo; i++)
4335 dest_vdo[i] = src_vdo[i];
4336
4337 return nr_vdo;
4338}
4339
96232cbc
LJ		 4340static int tcpm_fw_get_caps(struct tcpm_port *port,
4341 struct fwnode_handle *fwnode)
4342{
4343 const char *cap_str;
4344 int ret;
4345 u32 mw;
4346
4347 if (!fwnode)
4348 return -EINVAL;
4349
4350 /* USB data support is optional */
4351 ret = fwnode_property_read_string(fwnode, "data-role", &cap_str);
4352 if (ret == 0) {
4353 port->typec_caps.data = typec_find_port_data_role(cap_str);
4354 if (port->typec_caps.data < 0)
4355 return -EINVAL;
4356 }
4357
4358 ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
4359 if (ret < 0)
4360 return ret;
4361
4362 port->typec_caps.type = typec_find_port_power_role(cap_str);
4363 if (port->typec_caps.type < 0)
4364 return -EINVAL;
4365 port->port_type = port->typec_caps.type;
4366
4367 if (port->port_type == TYPEC_PORT_SNK)
4368 goto sink;
4369
4370 /* Get source pdos */
4371 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
4372 NULL, 0);
4373 if (ret <= 0)
4374 return -EINVAL;
4375
4376 port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
4377 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
4378 port->src_pdo, port->nr_src_pdo);
4379 if ((ret < 0) || tcpm_validate_caps(port, port->src_pdo,
4380 port->nr_src_pdo))
4381 return -EINVAL;
4382
4383 if (port->port_type == TYPEC_PORT_SRC)
4384 return 0;
4385
4386 /* Get the preferred power role for DRP */
4387 ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str);
4388 if (ret < 0)
4389 return ret;
4390
4391 port->typec_caps.prefer_role = typec_find_power_role(cap_str);
4392 if (port->typec_caps.prefer_role < 0)
4393 return -EINVAL;
4394sink:
4395 /* Get sink pdos */
4396 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
4397 NULL, 0);
4398 if (ret <= 0)
4399 return -EINVAL;
4400
4401 port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS);
4402 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
4403 port->snk_pdo, port->nr_snk_pdo);
4404 if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo,
4405 port->nr_snk_pdo))
4406 return -EINVAL;
4407
4408 if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0)
4409 return -EINVAL;
4410 port->operating_snk_mw = mw / 1000;
4411
4412 return 0;
4413}
4414
5007e1b5
BJS		 4415int tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo,
4416 unsigned int nr_pdo)
f0690a25 4417{
5007e1b5
BJS		 4418 if (tcpm_validate_caps(port, pdo, nr_pdo))
4419 return -EINVAL;
4420
f0690a25
GR		 4421 mutex_lock(&port->lock);
4422 port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, pdo, nr_pdo);
4423 switch (port->state) {
4424 case SRC_UNATTACHED:
4425 case SRC_ATTACH_WAIT:
4426 case SRC_TRYWAIT:
4427 tcpm_set_cc(port, tcpm_rp_cc(port));
4428 break;
4429 case SRC_SEND_CAPABILITIES:
4430 case SRC_NEGOTIATE_CAPABILITIES:
4431 case SRC_READY:
4432 case SRC_WAIT_NEW_CAPABILITIES:
4433 tcpm_set_cc(port, tcpm_rp_cc(port));
4434 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
4435 break;
4436 default:
4437 break;
4438 }
4439 mutex_unlock(&port->lock);
5007e1b5 4440 return 0;
f0690a25
GR		 4441}
4442EXPORT_SYMBOL_GPL(tcpm_update_source_capabilities);
4443
5007e1b5
BJS		 4444int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo,
4445 unsigned int nr_pdo,
5007e1b5 4446 unsigned int operating_snk_mw)
f0690a25 4447{
5007e1b5
BJS		 4448 if (tcpm_validate_caps(port, pdo, nr_pdo))
4449 return -EINVAL;
4450
f0690a25
GR		 4451 mutex_lock(&port->lock);
4452 port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, pdo, nr_pdo);
f0690a25 4453 port->operating_snk_mw = operating_snk_mw;
2eadc33f 4454 port->update_sink_caps = true;
f0690a25
GR		 4455
4456 switch (port->state) {
4457 case SNK_NEGOTIATE_CAPABILITIES:
2eadc33f 4458 case SNK_NEGOTIATE_PPS_CAPABILITIES:
f0690a25
GR		 4459 case SNK_READY:
4460 case SNK_TRANSITION_SINK:
4461 case SNK_TRANSITION_SINK_VBUS:
2eadc33f
AT		 4462 if (port->pps_data.active)
4463 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4464 else
4465 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
f0690a25
GR		 4466 break;
4467 default:
4468 break;
4469 }
4470 mutex_unlock(&port->lock);
5007e1b5 4471 return 0;
f0690a25
GR		 4472}
4473EXPORT_SYMBOL_GPL(tcpm_update_sink_capabilities);
4474
f2a8aa05
AT		 4475/* Power Supply access to expose source power information */
4476enum tcpm_psy_online_states {
4477 TCPM_PSY_OFFLINE = 0,
4478 TCPM_PSY_FIXED_ONLINE,
4479 TCPM_PSY_PROG_ONLINE,
4480};
4481
4482static enum power_supply_property tcpm_psy_props[] = {
4483 POWER_SUPPLY_PROP_USB_TYPE,
4484 POWER_SUPPLY_PROP_ONLINE,
4485 POWER_SUPPLY_PROP_VOLTAGE_MIN,
4486 POWER_SUPPLY_PROP_VOLTAGE_MAX,
4487 POWER_SUPPLY_PROP_VOLTAGE_NOW,
4488 POWER_SUPPLY_PROP_CURRENT_MAX,
4489 POWER_SUPPLY_PROP_CURRENT_NOW,
4490};
4491
4492static int tcpm_psy_get_online(struct tcpm_port *port,
4493 union power_supply_propval *val)
4494{
4495 if (port->vbus_charge) {
4496 if (port->pps_data.active)
4497 val->intval = TCPM_PSY_PROG_ONLINE;
4498 else
4499 val->intval = TCPM_PSY_FIXED_ONLINE;
4500 } else {
4501 val->intval = TCPM_PSY_OFFLINE;
4502 }
4503
4504 return 0;
4505}
4506
4507static int tcpm_psy_get_voltage_min(struct tcpm_port *port,
4508 union power_supply_propval *val)
4509{
4510 if (port->pps_data.active)
4511 val->intval = port->pps_data.min_volt * 1000;
4512 else
4513 val->intval = port->supply_voltage * 1000;
4514
4515 return 0;
4516}
4517
4518static int tcpm_psy_get_voltage_max(struct tcpm_port *port,
4519 union power_supply_propval *val)
4520{
4521 if (port->pps_data.active)
4522 val->intval = port->pps_data.max_volt * 1000;
4523 else
4524 val->intval = port->supply_voltage * 1000;
4525
4526 return 0;
4527}
4528
4529static int tcpm_psy_get_voltage_now(struct tcpm_port *port,
4530 union power_supply_propval *val)
4531{
4532 val->intval = port->supply_voltage * 1000;
4533
4534 return 0;
4535}
4536
4537static int tcpm_psy_get_current_max(struct tcpm_port *port,
4538 union power_supply_propval *val)
4539{
4540 if (port->pps_data.active)
4541 val->intval = port->pps_data.max_curr * 1000;
4542 else
4543 val->intval = port->current_limit * 1000;
4544
4545 return 0;
4546}
4547
4548static int tcpm_psy_get_current_now(struct tcpm_port *port,
4549 union power_supply_propval *val)
4550{
4551 val->intval = port->current_limit * 1000;
4552
4553 return 0;
4554}
4555
4556static int tcpm_psy_get_prop(struct power_supply *psy,
4557 enum power_supply_property psp,
4558 union power_supply_propval *val)
4559{
4560 struct tcpm_port *port = power_supply_get_drvdata(psy);
4561 int ret = 0;
4562
4563 switch (psp) {
4564 case POWER_SUPPLY_PROP_USB_TYPE:
4565 val->intval = port->usb_type;
4566 break;
4567 case POWER_SUPPLY_PROP_ONLINE:
4568 ret = tcpm_psy_get_online(port, val);
4569 break;
4570 case POWER_SUPPLY_PROP_VOLTAGE_MIN:
4571 ret = tcpm_psy_get_voltage_min(port, val);
4572 break;
4573 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
4574 ret = tcpm_psy_get_voltage_max(port, val);
4575 break;
4576 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4577 ret = tcpm_psy_get_voltage_now(port, val);
4578 break;
4579 case POWER_SUPPLY_PROP_CURRENT_MAX:
4580 ret = tcpm_psy_get_current_max(port, val);
4581 break;
4582 case POWER_SUPPLY_PROP_CURRENT_NOW:
4583 ret = tcpm_psy_get_current_now(port, val);
4584 break;
4585 default:
4586 ret = -EINVAL;
4587 break;
4588 }
4589
4590 return ret;
4591}
4592
4593static int tcpm_psy_set_online(struct tcpm_port *port,
4594 const union power_supply_propval *val)
4595{
4596 int ret;
4597
4598 switch (val->intval) {
4599 case TCPM_PSY_FIXED_ONLINE:
4600 ret = tcpm_pps_activate(port, false);
4601 break;
4602 case TCPM_PSY_PROG_ONLINE:
4603 ret = tcpm_pps_activate(port, true);
4604 break;
4605 default:
4606 ret = -EINVAL;
4607 break;
4608 }
4609
4610 return ret;
4611}
4612
4613static int tcpm_psy_set_prop(struct power_supply *psy,
4614 enum power_supply_property psp,
4615 const union power_supply_propval *val)
4616{
4617 struct tcpm_port *port = power_supply_get_drvdata(psy);
4618 int ret;
4619
4620 switch (psp) {
4621 case POWER_SUPPLY_PROP_ONLINE:
4622 ret = tcpm_psy_set_online(port, val);
4623 break;
4624 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4625 if (val->intval < port->pps_data.min_volt * 1000 ||
4626 val->intval > port->pps_data.max_volt * 1000)
4627 ret = -EINVAL;
4628 else
4629 ret = tcpm_pps_set_out_volt(port, val->intval / 1000);
4630 break;
4631 case POWER_SUPPLY_PROP_CURRENT_NOW:
4632 if (val->intval > port->pps_data.max_curr * 1000)
4633 ret = -EINVAL;
4634 else
4635 ret = tcpm_pps_set_op_curr(port, val->intval / 1000);
4636 break;
4637 default:
4638 ret = -EINVAL;
4639 break;
4640 }
4641
4642 return ret;
4643}
4644
4645static int tcpm_psy_prop_writeable(struct power_supply *psy,
4646 enum power_supply_property psp)
4647{
4648 switch (psp) {
4649 case POWER_SUPPLY_PROP_ONLINE:
4650 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4651 case POWER_SUPPLY_PROP_CURRENT_NOW:
4652 return 1;
4653 default:
4654 return 0;
4655 }
4656}
4657
4658static enum power_supply_usb_type tcpm_psy_usb_types[] = {
4659 POWER_SUPPLY_USB_TYPE_C,
4660 POWER_SUPPLY_USB_TYPE_PD,
4661 POWER_SUPPLY_USB_TYPE_PD_PPS,
4662};
4663
4664static const char *tcpm_psy_name_prefix = "tcpm-source-psy-";
4665
4666static int devm_tcpm_psy_register(struct tcpm_port *port)
4667{
4668 struct power_supply_config psy_cfg = {};
4669 const char *port_dev_name = dev_name(port->dev);
4670 size_t psy_name_len = strlen(tcpm_psy_name_prefix) +
4671 strlen(port_dev_name) + 1;
4672 char *psy_name;
4673
4674 psy_cfg.drv_data = port;
c97a8cc1 4675 psy_cfg.fwnode = dev_fwnode(port->dev);
f2a8aa05
AT		 4676 psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL);
4677 if (!psy_name)
4678 return -ENOMEM;
4679
4680 snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix,
4681 port_dev_name);
4682 port->psy_desc.name = psy_name;
4683 port->psy_desc.type = POWER_SUPPLY_TYPE_USB,
4684 port->psy_desc.usb_types = tcpm_psy_usb_types;
4685 port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types);
4686 port->psy_desc.properties = tcpm_psy_props,
4687 port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props),
4688 port->psy_desc.get_property = tcpm_psy_get_prop,
4689 port->psy_desc.set_property = tcpm_psy_set_prop,
4690 port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable,
4691
4692 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
4693
4694 port->psy = devm_power_supply_register(port->dev, &port->psy_desc,
4695 &psy_cfg);
4696
4697 return PTR_ERR_OR_ZERO(port->psy);
4698}
4699
96232cbc
LJ		 4700static int tcpm_copy_caps(struct tcpm_port *port,
4701 const struct tcpc_config *tcfg)
4702{
4703 if (tcpm_validate_caps(port, tcfg->src_pdo, tcfg->nr_src_pdo) ||
4704 tcpm_validate_caps(port, tcfg->snk_pdo, tcfg->nr_snk_pdo))
4705 return -EINVAL;
4706
4707 port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcfg->src_pdo,
4708 tcfg->nr_src_pdo);
4709 port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcfg->snk_pdo,
4710 tcfg->nr_snk_pdo);
4711
4712 port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcfg->snk_vdo,
4713 tcfg->nr_snk_vdo);
4714
4715 port->operating_snk_mw = tcfg->operating_snk_mw;
4716
4717 port->typec_caps.prefer_role = tcfg->default_role;
4718 port->typec_caps.type = tcfg->type;
4719 port->typec_caps.data = tcfg->data;
4720
4721 return 0;
4722}
4723
f0690a25
GR		 4724struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
4725{
4726 struct tcpm_port *port;
4727 int i, err;
4728
96232cbc 4729 if (!dev || !tcpc ||
f0690a25
GR		 4730 !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc ||
4731 !tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus ||
4732 !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit)
4733 return ERR_PTR(-EINVAL);
4734
4735 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
4736 if (!port)
4737 return ERR_PTR(-ENOMEM);
4738
4739 port->dev = dev;
4740 port->tcpc = tcpc;
4741
4742 mutex_init(&port->lock);
4743 mutex_init(&port->swap_lock);
4744
4745 port->wq = create_singlethread_workqueue(dev_name(dev));
4746 if (!port->wq)
4747 return ERR_PTR(-ENOMEM);
4748 INIT_DELAYED_WORK(&port->state_machine, tcpm_state_machine_work);
4749 INIT_DELAYED_WORK(&port->vdm_state_machine, vdm_state_machine_work);
4750 INIT_WORK(&port->event_work, tcpm_pd_event_handler);
4751
4752 spin_lock_init(&port->pd_event_lock);
4753
4754 init_completion(&port->tx_complete);
4755 init_completion(&port->swap_complete);
2eadc33f 4756 init_completion(&port->pps_complete);
5007e1b5 4757 tcpm_debugfs_init(port);
f0690a25 4758
96232cbc
LJ		 4759 err = tcpm_fw_get_caps(port, tcpc->fwnode);
4760 if ((err < 0) && tcpc->config)
4761 err = tcpm_copy_caps(port, tcpc->config);
4762 if (err < 0)
5007e1b5 4763 goto out_destroy_wq;
96232cbc
LJ		 4764
4765 if (!tcpc->config || !tcpc->config->try_role_hw)
4766 port->try_role = port->typec_caps.prefer_role;
f0690a25
GR		 4767 else
4768 port->try_role = TYPEC_NO_PREFERRED_ROLE;
4769
5e85a04c 4770 port->typec_caps.fwnode = tcpc->fwnode;
f0690a25 4771 port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */
2eadc33f 4772 port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */
f0690a25
GR		 4773 port->typec_caps.dr_set = tcpm_dr_set;
4774 port->typec_caps.pr_set = tcpm_pr_set;
4775 port->typec_caps.vconn_set = tcpm_vconn_set;
4776 port->typec_caps.try_role = tcpm_try_role;
9b0ae699 4777 port->typec_caps.port_type_set = tcpm_port_type_set;
f0690a25
GR		 4778
4779 port->partner_desc.identity = &port->partner_ident;
96232cbc 4780 port->port_type = port->typec_caps.type;
f0690a25 4781
2000016c
HG		 4782 port->role_sw = usb_role_switch_get(port->dev);
4783 if (IS_ERR(port->role_sw)) {
4784 err = PTR_ERR(port->role_sw);
4785 goto out_destroy_wq;
4786 }
4787
f2a8aa05
AT		 4788 err = devm_tcpm_psy_register(port);
4789 if (err)
4790 goto out_destroy_wq;
4791
f0690a25 4792 port->typec_port = typec_register_port(port->dev, &port->typec_caps);
cf6e06cd
HK		 4793 if (IS_ERR(port->typec_port)) {
4794 err = PTR_ERR(port->typec_port);
f0690a25
GR		 4795 goto out_destroy_wq;
4796 }
4797
96232cbc 4798 if (tcpc->config && tcpc->config->alt_modes) {
3c41dbde 4799 const struct typec_altmode_desc *paltmode = tcpc->config->alt_modes;
f0690a25
GR		 4800
4801 i = 0;
4802 while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) {
cf6e06cd
HK		 4803 struct typec_altmode *alt;
4804
4805 alt = typec_port_register_altmode(port->typec_port,
4806 paltmode);
4807 if (IS_ERR(alt)) {
f0690a25
GR		 4808 tcpm_log(port,
4809 "%s: failed to register port alternate mode 0x%x",
4810 dev_name(dev), paltmode->svid);
4811 break;
4812 }
e9576fe8
HK		 4813 typec_altmode_set_drvdata(alt, port);
4814 alt->ops = &tcpm_altmode_ops;
cf6e06cd 4815 port->port_altmode[i] = alt;
f0690a25
GR		 4816 i++;
4817 paltmode++;
4818 }
4819 }
4820
f0690a25
GR		 4821 mutex_lock(&port->lock);
4822 tcpm_init(port);
4823 mutex_unlock(&port->lock);
4824
4825 tcpm_log(port, "%s: registered", dev_name(dev));
4826 return port;
4827
4828out_destroy_wq:
2000016c 4829 usb_role_switch_put(port->role_sw);
f0690a25
GR		 4830 destroy_workqueue(port->wq);
4831 return ERR_PTR(err);
4832}
4833EXPORT_SYMBOL_GPL(tcpm_register_port);
4834
4835void tcpm_unregister_port(struct tcpm_port *port)
4836{
4837 int i;
4838
a6d5d230 4839 tcpm_reset_port(port);
f0690a25
GR		 4840 for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++)
4841 typec_unregister_altmode(port->port_altmode[i]);
4842 typec_unregister_port(port->typec_port);
5671a460 4843 usb_role_switch_put(port->role_sw);
f0690a25
GR		 4844 tcpm_debugfs_exit(port);
4845 destroy_workqueue(port->wq);
4846}
4847EXPORT_SYMBOL_GPL(tcpm_unregister_port);
4848
4849MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>");
4850MODULE_DESCRIPTION("USB Type-C Port Manager");
4851MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)