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Merge tag 'soc-drivers-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
[linux-block.git] / drivers / usb / typec / ucsi / ucsi.c
CommitLineData
5fd54ace 1// SPDX-License-Identifier: GPL-2.0
c1b0bc2d
HK		 2/*
3 * USB Type-C Connector System Software Interface driver
4 *
5 * Copyright (C) 2017, Intel Corporation
6 * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
c1b0bc2d
HK		 7 */
8
9#include <linux/completion.h>
10#include <linux/property.h>
11#include <linux/device.h>
12#include <linux/module.h>
13#include <linux/delay.h>
14#include <linux/slab.h>
af8622f6 15#include <linux/usb/typec_dp.h>
c1b0bc2d
HK		 16
17#include "ucsi.h"
18#include "trace.h"
19
c1b0bc2d
HK		 20/*
21 * UCSI_TIMEOUT_MS - PPM communication timeout
22 *
23 * Ideally we could use MIN_TIME_TO_RESPOND_WITH_BUSY (which is defined in UCSI
24 * specification) here as reference, but unfortunately we can't. It is very
25 * difficult to estimate the time it takes for the system to process the command
26 * before it is actually passed to the PPM.
27 */
b1b59e16 28#define UCSI_TIMEOUT_MS 5000
c1b0bc2d
HK		 29
30/*
31 * UCSI_SWAP_TIMEOUT_MS - Timeout for role swap requests
32 *
33 * 5 seconds is close to the time it takes for CapsCounter to reach 0, so even
34 * if the PPM does not generate Connector Change events before that with
35 * partners that do not support USB Power Delivery, this should still work.
36 */
37#define UCSI_SWAP_TIMEOUT_MS 5000
38
bdc62f2b
HK		 39static int ucsi_acknowledge_command(struct ucsi *ucsi)
40{
41 u64 ctrl;
42
43 ctrl = UCSI_ACK_CC_CI;
44 ctrl |= UCSI_ACK_COMMAND_COMPLETE;
45
46 return ucsi->ops->sync_write(ucsi, UCSI_CONTROL, &ctrl, sizeof(ctrl));
47}
48
49static int ucsi_acknowledge_connector_change(struct ucsi *ucsi)
50{
51 u64 ctrl;
52
53 ctrl = UCSI_ACK_CC_CI;
54 ctrl |= UCSI_ACK_CONNECTOR_CHANGE;
55
217504a0 56 return ucsi->ops->sync_write(ucsi, UCSI_CONTROL, &ctrl, sizeof(ctrl));
bdc62f2b
HK		 57}
58
59static int ucsi_exec_command(struct ucsi *ucsi, u64 command);
60
61static int ucsi_read_error(struct ucsi *ucsi)
62{
63 u16 error;
64 int ret;
65
2665a13a 66 /* Acknowledge the command that failed */
bdc62f2b
HK		 67 ret = ucsi_acknowledge_command(ucsi);
68 if (ret)
69 return ret;
70
71 ret = ucsi_exec_command(ucsi, UCSI_GET_ERROR_STATUS);
72 if (ret < 0)
73 return ret;
74
75 ret = ucsi->ops->read(ucsi, UCSI_MESSAGE_IN, &error, sizeof(error));
76 if (ret)
77 return ret;
78
a7dc438b
LY		 79 ret = ucsi_acknowledge_command(ucsi);
80 if (ret)
81 return ret;
82
bdc62f2b
HK		 83 switch (error) {
84 case UCSI_ERROR_INCOMPATIBLE_PARTNER:
85 return -EOPNOTSUPP;
86 case UCSI_ERROR_CC_COMMUNICATION_ERR:
87 return -ECOMM;
88 case UCSI_ERROR_CONTRACT_NEGOTIATION_FAIL:
89 return -EPROTO;
90 case UCSI_ERROR_DEAD_BATTERY:
91 dev_warn(ucsi->dev, "Dead battery condition!\n");
92 return -EPERM;
bdc62f2b
HK		 93 case UCSI_ERROR_INVALID_CON_NUM:
94 case UCSI_ERROR_UNREGONIZED_CMD:
95 case UCSI_ERROR_INVALID_CMD_ARGUMENT:
e716bb38 96 dev_err(ucsi->dev, "possible UCSI driver bug %u\n", error);
bdc62f2b 97 return -EINVAL;
e716bb38
HK		 98 case UCSI_ERROR_OVERCURRENT:
99 dev_warn(ucsi->dev, "Overcurrent condition\n");
100 break;
101 case UCSI_ERROR_PARTNER_REJECTED_SWAP:
102 dev_warn(ucsi->dev, "Partner rejected swap\n");
103 break;
104 case UCSI_ERROR_HARD_RESET:
105 dev_warn(ucsi->dev, "Hard reset occurred\n");
106 break;
107 case UCSI_ERROR_PPM_POLICY_CONFLICT:
108 dev_warn(ucsi->dev, "PPM Policy conflict\n");
109 break;
110 case UCSI_ERROR_SWAP_REJECTED:
111 dev_warn(ucsi->dev, "Swap rejected\n");
112 break;
113 case UCSI_ERROR_UNDEFINED:
bdc62f2b 114 default:
e716bb38
HK		 115 dev_err(ucsi->dev, "unknown error %u\n", error);
116 break;
bdc62f2b
HK		 117 }
118
e716bb38 119 return -EIO;
bdc62f2b
HK		 120}
121
122static int ucsi_exec_command(struct ucsi *ucsi, u64 cmd)
123{
124 u32 cci;
125 int ret;
126
127 ret = ucsi->ops->sync_write(ucsi, UCSI_CONTROL, &cmd, sizeof(cmd));
128 if (ret)
129 return ret;
130
131 ret = ucsi->ops->read(ucsi, UCSI_CCI, &cci, sizeof(cci));
132 if (ret)
133 return ret;
134
c4a8bfab
HK		 135 if (cmd != UCSI_CANCEL && cci & UCSI_CCI_BUSY)
136 return ucsi_exec_command(ucsi, UCSI_CANCEL);
bdc62f2b
HK		 137
138 if (!(cci & UCSI_CCI_COMMAND_COMPLETE))
139 return -EIO;
140
141 if (cci & UCSI_CCI_NOT_SUPPORTED)
142 return -EOPNOTSUPP;
143
144 if (cci & UCSI_CCI_ERROR) {
145 if (cmd == UCSI_GET_ERROR_STATUS)
146 return -EIO;
147 return ucsi_read_error(ucsi);
148 }
149
c4a8bfab
HK		 150 if (cmd == UCSI_CANCEL && cci & UCSI_CCI_CANCEL_COMPLETE) {
151 ret = ucsi_acknowledge_command(ucsi);
152 return ret ? ret : -EBUSY;
153 }
154
bdc62f2b
HK		 155 return UCSI_CCI_LENGTH(cci);
156}
157
25794e30
HG		 158int ucsi_send_command(struct ucsi *ucsi, u64 command,
159 void *data, size_t size)
c1b0bc2d 160{
2ede5546 161 u8 length;
c1b0bc2d
HK		 162 int ret;
163
25794e30 164 mutex_lock(&ucsi->ppm_lock);
7e90057f 165
470ce43a 166 ret = ucsi_exec_command(ucsi, command);
2ede5546 167 if (ret < 0)
25794e30 168 goto out;
bdc62f2b 169
2ede5546 170 length = ret;
bdc62f2b 171
2ede5546
HK		 172 if (data) {
173 ret = ucsi->ops->read(ucsi, UCSI_MESSAGE_IN, data, size);
bdc62f2b 174 if (ret)
25794e30 175 goto out;
bdc62f2b
HK		 176 }
177
2ede5546 178 ret = ucsi_acknowledge_command(ucsi);
c1b0bc2d 179 if (ret)
25794e30 180 goto out;
c1b0bc2d 181
25794e30
HG		 182 ret = length;
183out:
ad74b864 184 mutex_unlock(&ucsi->ppm_lock);
ad74b864
HK		 185 return ret;
186}
a94ecde4 187EXPORT_SYMBOL_GPL(ucsi_send_command);
ad74b864 188
c1b0bc2d
HK		 189/* -------------------------------------------------------------------------- */
190
b9aa02ca
HK		 191struct ucsi_work {
192 struct delayed_work work;
fac4b863 193 struct list_head node;
b9aa02ca
HK		 194 unsigned long delay;
195 unsigned int count;
196 struct ucsi_connector *con;
197 int (*cb)(struct ucsi_connector *);
198};
199
200static void ucsi_poll_worker(struct work_struct *work)
201{
202 struct ucsi_work *uwork = container_of(work, struct ucsi_work, work.work);
203 struct ucsi_connector *con = uwork->con;
204 int ret;
205
206 mutex_lock(&con->lock);
207
208 if (!con->partner) {
fac4b863 209 list_del(&uwork->node);
b9aa02ca
HK		 210 mutex_unlock(&con->lock);
211 kfree(uwork);
212 return;
213 }
214
215 ret = uwork->cb(con);
216
fac4b863 217 if (uwork->count-- && (ret == -EBUSY || ret == -ETIMEDOUT)) {
b9aa02ca 218 queue_delayed_work(con->wq, &uwork->work, uwork->delay);
fac4b863
JP		 219 } else {
220 list_del(&uwork->node);
b9aa02ca 221 kfree(uwork);
fac4b863 222 }
b9aa02ca
HK		 223
224 mutex_unlock(&con->lock);
225}
226
227static int ucsi_partner_task(struct ucsi_connector *con,
228 int (*cb)(struct ucsi_connector *),
229 int retries, unsigned long delay)
230{
231 struct ucsi_work *uwork;
232
233 if (!con->partner)
234 return 0;
235
236 uwork = kzalloc(sizeof(*uwork), GFP_KERNEL);
237 if (!uwork)
238 return -ENOMEM;
239
240 INIT_DELAYED_WORK(&uwork->work, ucsi_poll_worker);
241 uwork->count = retries;
242 uwork->delay = delay;
243 uwork->con = con;
244 uwork->cb = cb;
245
fac4b863 246 list_add_tail(&uwork->node, &con->partner_tasks);
b9aa02ca
HK		 247 queue_delayed_work(con->wq, &uwork->work, delay);
248
249 return 0;
250}
251
252/* -------------------------------------------------------------------------- */
253
ad74b864
HK		 254void ucsi_altmode_update_active(struct ucsi_connector *con)
255{
256 const struct typec_altmode *altmode = NULL;
2ede5546 257 u64 command;
ad74b864
HK		 258 int ret;
259 u8 cur;
260 int i;
261
470ce43a 262 command = UCSI_GET_CURRENT_CAM | UCSI_CONNECTOR_NUMBER(con->num);
0ff0705a 263 ret = ucsi_send_command(con->ucsi, command, &cur, sizeof(cur));
ad74b864 264 if (ret < 0) {
2ede5546 265 if (con->ucsi->version > 0x0100) {
ad74b864
HK		 266 dev_err(con->ucsi->dev,
267 "GET_CURRENT_CAM command failed\n");
268 return;
269 }
270 cur = 0xff;
271 }
272
273 if (cur < UCSI_MAX_ALTMODES)
274 altmode = typec_altmode_get_partner(con->port_altmode[cur]);
275
276 for (i = 0; con->partner_altmode[i]; i++)
277 typec_altmode_update_active(con->partner_altmode[i],
278 con->partner_altmode[i] == altmode);
279}
280
386e15a6 281static int ucsi_altmode_next_mode(struct typec_altmode **alt, u16 svid)
ad74b864
HK		 282{
283 u8 mode = 1;
284 int i;
285
386e15a6
HK		 286 for (i = 0; alt[i]; i++) {
287 if (i > MODE_DISCOVERY_MAX)
288 return -ERANGE;
289
ad74b864
HK		 290 if (alt[i]->svid == svid)
291 mode++;
386e15a6 292 }
ad74b864
HK		 293
294 return mode;
295}
296
297static int ucsi_next_altmode(struct typec_altmode **alt)
298{
299 int i = 0;
300
301 for (i = 0; i < UCSI_MAX_ALTMODES; i++)
302 if (!alt[i])
303 return i;
304
305 return -ENOENT;
306}
307
4616dddc
SG		 308static int ucsi_get_num_altmode(struct typec_altmode **alt)
309{
310 int i;
311
312 for (i = 0; i < UCSI_MAX_ALTMODES; i++)
313 if (!alt[i])
314 break;
315
316 return i;
317}
318
ad74b864
HK		 319static int ucsi_register_altmode(struct ucsi_connector *con,
320 struct typec_altmode_desc *desc,
321 u8 recipient)
322{
323 struct typec_altmode *alt;
af8622f6 324 bool override;
ad74b864
HK		 325 int ret;
326 int i;
327
af8622f6
HK		 328 override = !!(con->ucsi->cap.features & UCSI_CAP_ALT_MODE_OVERRIDE);
329
ad74b864
HK		 330 switch (recipient) {
331 case UCSI_RECIPIENT_CON:
332 i = ucsi_next_altmode(con->port_altmode);
333 if (i < 0) {
334 ret = i;
335 goto err;
336 }
337
386e15a6
HK		 338 ret = ucsi_altmode_next_mode(con->port_altmode, desc->svid);
339 if (ret < 0)
340 return ret;
341
342 desc->mode = ret;
ad74b864 343
af8622f6
HK		 344 switch (desc->svid) {
345 case USB_TYPEC_DP_SID:
346 alt = ucsi_register_displayport(con, override, i, desc);
347 break;
c2ae4928
AG		 348 case USB_TYPEC_NVIDIA_VLINK_SID:
349 if (desc->vdo == USB_TYPEC_NVIDIA_VLINK_DBG_VDO)
350 alt = typec_port_register_altmode(con->port,
351 desc);
352 else
353 alt = ucsi_register_displayport(con, override,
354 i, desc);
355 break;
af8622f6
HK		 356 default:
357 alt = typec_port_register_altmode(con->port, desc);
358 break;
359 }
360
ad74b864
HK		 361 if (IS_ERR(alt)) {
362 ret = PTR_ERR(alt);
363 goto err;
364 }
365
366 con->port_altmode[i] = alt;
367 break;
368 case UCSI_RECIPIENT_SOP:
369 i = ucsi_next_altmode(con->partner_altmode);
370 if (i < 0) {
371 ret = i;
372 goto err;
373 }
374
386e15a6
HK		 375 ret = ucsi_altmode_next_mode(con->partner_altmode, desc->svid);
376 if (ret < 0)
377 return ret;
378
379 desc->mode = ret;
ad74b864
HK		 380
381 alt = typec_partner_register_altmode(con->partner, desc);
382 if (IS_ERR(alt)) {
383 ret = PTR_ERR(alt);
384 goto err;
385 }
386
387 con->partner_altmode[i] = alt;
388 break;
389 default:
390 return -EINVAL;
391 }
392
393 trace_ucsi_register_altmode(recipient, alt);
394
395 return 0;
396
397err:
398 dev_err(con->ucsi->dev, "failed to registers svid 0x%04x mode %d\n",
399 desc->svid, desc->mode);
400
401 return ret;
402}
403
170a6726
AG		 404static int
405ucsi_register_altmodes_nvidia(struct ucsi_connector *con, u8 recipient)
406{
407 int max_altmodes = UCSI_MAX_ALTMODES;
408 struct typec_altmode_desc desc;
409 struct ucsi_altmode alt;
410 struct ucsi_altmode orig[UCSI_MAX_ALTMODES];
411 struct ucsi_altmode updated[UCSI_MAX_ALTMODES];
412 struct ucsi *ucsi = con->ucsi;
413 bool multi_dp = false;
414 u64 command;
415 int ret;
416 int len;
417 int i;
418 int k = 0;
419
420 if (recipient == UCSI_RECIPIENT_CON)
421 max_altmodes = con->ucsi->cap.num_alt_modes;
422
423 memset(orig, 0, sizeof(orig));
424 memset(updated, 0, sizeof(updated));
425
426 /* First get all the alternate modes */
427 for (i = 0; i < max_altmodes; i++) {
428 memset(&alt, 0, sizeof(alt));
429 command = UCSI_GET_ALTERNATE_MODES;
430 command |= UCSI_GET_ALTMODE_RECIPIENT(recipient);
431 command |= UCSI_GET_ALTMODE_CONNECTOR_NUMBER(con->num);
432 command |= UCSI_GET_ALTMODE_OFFSET(i);
0ff0705a 433 len = ucsi_send_command(con->ucsi, command, &alt, sizeof(alt));
170a6726
AG		 434 /*
435 * We are collecting all altmodes first and then registering.
436 * Some type-C device will return zero length data beyond last
437 * alternate modes. We should not return if length is zero.
438 */
439 if (len < 0)
440 return len;
441
442 /* We got all altmodes, now break out and register them */
443 if (!len || !alt.svid)
444 break;
445
446 orig[k].mid = alt.mid;
447 orig[k].svid = alt.svid;
448 k++;
449 }
450 /*
451 * Update the original altmode table as some ppms may report
452 * multiple DP altmodes.
453 */
454 if (recipient == UCSI_RECIPIENT_CON)
455 multi_dp = ucsi->ops->update_altmodes(ucsi, orig, updated);
456
457 /* now register altmodes */
458 for (i = 0; i < max_altmodes; i++) {
459 memset(&desc, 0, sizeof(desc));
460 if (multi_dp && recipient == UCSI_RECIPIENT_CON) {
461 desc.svid = updated[i].svid;
462 desc.vdo = updated[i].mid;
463 } else {
464 desc.svid = orig[i].svid;
465 desc.vdo = orig[i].mid;
466 }
467 desc.roles = TYPEC_PORT_DRD;
468
469 if (!desc.svid)
470 return 0;
471
472 ret = ucsi_register_altmode(con, &desc, recipient);
473 if (ret)
474 return ret;
475 }
476
477 return 0;
478}
479
ad74b864
HK		 480static int ucsi_register_altmodes(struct ucsi_connector *con, u8 recipient)
481{
482 int max_altmodes = UCSI_MAX_ALTMODES;
483 struct typec_altmode_desc desc;
484 struct ucsi_altmode alt[2];
470ce43a 485 u64 command;
85798543 486 int num;
ad74b864
HK		 487 int ret;
488 int len;
489 int j;
490 int i;
491
492 if (!(con->ucsi->cap.features & UCSI_CAP_ALT_MODE_DETAILS))
493 return 0;
494
495 if (recipient == UCSI_RECIPIENT_SOP && con->partner_altmode[0])
496 return 0;
497
170a6726
AG		 498 if (con->ucsi->ops->update_altmodes)
499 return ucsi_register_altmodes_nvidia(con, recipient);
500
ad74b864
HK		 501 if (recipient == UCSI_RECIPIENT_CON)
502 max_altmodes = con->ucsi->cap.num_alt_modes;
503
504 for (i = 0; i < max_altmodes;) {
505 memset(alt, 0, sizeof(alt));
470ce43a
HK		 506 command = UCSI_GET_ALTERNATE_MODES;
507 command |= UCSI_GET_ALTMODE_RECIPIENT(recipient);
508 command |= UCSI_GET_ALTMODE_CONNECTOR_NUMBER(con->num);
509 command |= UCSI_GET_ALTMODE_OFFSET(i);
0ff0705a 510 len = ucsi_send_command(con->ucsi, command, alt, sizeof(alt));
47eb8de3
HK		 511 if (len == -EBUSY)
512 continue;
ad74b864
HK		 513 if (len <= 0)
514 return len;
515
516 /*
517 * This code is requesting one alt mode at a time, but some PPMs
518 * may still return two. If that happens both alt modes need be
519 * registered and the offset for the next alt mode has to be
520 * incremented.
521 */
522 num = len / sizeof(alt[0]);
523 i += num;
524
525 for (j = 0; j < num; j++) {
526 if (!alt[j].svid)
527 return 0;
528
529 memset(&desc, 0, sizeof(desc));
530 desc.vdo = alt[j].mid;
531 desc.svid = alt[j].svid;
532 desc.roles = TYPEC_PORT_DRD;
533
534 ret = ucsi_register_altmode(con, &desc, recipient);
535 if (ret)
536 return ret;
537 }
538 }
539
540 return 0;
541}
542
543static void ucsi_unregister_altmodes(struct ucsi_connector *con, u8 recipient)
544{
af8622f6 545 const struct typec_altmode *pdev;
ad74b864
HK		 546 struct typec_altmode **adev;
547 int i = 0;
548
549 switch (recipient) {
550 case UCSI_RECIPIENT_CON:
551 adev = con->port_altmode;
552 break;
553 case UCSI_RECIPIENT_SOP:
554 adev = con->partner_altmode;
555 break;
556 default:
557 return;
558 }
559
560 while (adev[i]) {
af8622f6 561 if (recipient == UCSI_RECIPIENT_SOP &&
cf28369c 562 (adev[i]->svid == USB_TYPEC_DP_SID ||
c2ae4928
AG		 563 (adev[i]->svid == USB_TYPEC_NVIDIA_VLINK_SID &&
564 adev[i]->vdo != USB_TYPEC_NVIDIA_VLINK_DBG_VDO))) {
af8622f6
HK		 565 pdev = typec_altmode_get_partner(adev[i]);
566 ucsi_displayport_remove_partner((void *)pdev);
567 }
ad74b864
HK		 568 typec_unregister_altmode(adev[i]);
569 adev[i++] = NULL;
570 }
571}
572
b04e1747
SG		 573static int ucsi_read_pdos(struct ucsi_connector *con,
574 enum typec_role role, int is_partner,
575 u32 *pdos, int offset, int num_pdos)
4dbc6a4e
A		 576{
577 struct ucsi *ucsi = con->ucsi;
578 u64 command;
579 int ret;
580
1d103d6a
DB		 581 if (ucsi->quirks & UCSI_NO_PARTNER_PDOS)
582 return 0;
583
4dbc6a4e
A		 584 command = UCSI_COMMAND(UCSI_GET_PDOS) | UCSI_CONNECTOR_NUMBER(con->num);
585 command |= UCSI_GET_PDOS_PARTNER_PDO(is_partner);
1f4642b7
JP		 586 command |= UCSI_GET_PDOS_PDO_OFFSET(offset);
587 command |= UCSI_GET_PDOS_NUM_PDOS(num_pdos - 1);
b04e1747 588 command |= is_source(role) ? UCSI_GET_PDOS_SRC_PDOS : 0;
1f4642b7
JP		 589 ret = ucsi_send_command(ucsi, command, pdos + offset,
590 num_pdos * sizeof(u32));
bd19ac98 591 if (ret < 0 && ret != -ETIMEDOUT)
4dbc6a4e 592 dev_err(ucsi->dev, "UCSI_GET_PDOS failed (%d)\n", ret);
1f4642b7
JP		 593
594 return ret;
595}
596
b04e1747
SG		 597static int ucsi_get_pdos(struct ucsi_connector *con, enum typec_role role,
598 int is_partner, u32 *pdos)
1f4642b7 599{
b04e1747 600 u8 num_pdos;
1f4642b7
JP		 601 int ret;
602
603 /* UCSI max payload means only getting at most 4 PDOs at a time */
b04e1747 604 ret = ucsi_read_pdos(con, role, is_partner, pdos, 0, UCSI_MAX_PDOS);
1f4642b7 605 if (ret < 0)
bd19ac98 606 return ret;
1f4642b7 607
b04e1747
SG		 608 num_pdos = ret / sizeof(u32); /* number of bytes to 32-bit PDOs */
609 if (num_pdos < UCSI_MAX_PDOS)
610 return num_pdos;
1f4642b7
JP		 611
612 /* get the remaining PDOs, if any */
b04e1747
SG		 613 ret = ucsi_read_pdos(con, role, is_partner, pdos, UCSI_MAX_PDOS,
614 PDO_MAX_OBJECTS - UCSI_MAX_PDOS);
1f4642b7 615 if (ret < 0)
bd19ac98 616 return ret;
1f4642b7 617
b04e1747
SG		 618 return ret / sizeof(u32) + num_pdos;
619}
620
621static int ucsi_get_src_pdos(struct ucsi_connector *con)
622{
623 int ret;
624
625 ret = ucsi_get_pdos(con, TYPEC_SOURCE, 1, con->src_pdos);
626 if (ret < 0)
627 return ret;
628
629 con->num_pdos = ret;
bd19ac98
HK		 630
631 ucsi_port_psy_changed(con);
632
b04e1747 633 return ret;
4dbc6a4e
A		 634}
635
b9aa02ca
HK		 636static int ucsi_check_altmodes(struct ucsi_connector *con)
637{
4616dddc 638 int ret, num_partner_am;
b9aa02ca
HK		 639
640 ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP);
641 if (ret && ret != -ETIMEDOUT)
642 dev_err(con->ucsi->dev,
643 "con%d: failed to register partner alt modes (%d)\n",
644 con->num, ret);
645
646 /* Ignoring the errors in this case. */
647 if (con->partner_altmode[0]) {
4616dddc
SG		 648 num_partner_am = ucsi_get_num_altmode(con->partner_altmode);
649 if (num_partner_am > 0)
650 typec_partner_set_num_altmodes(con->partner, num_partner_am);
b9aa02ca
HK		 651 ucsi_altmode_update_active(con);
652 return 0;
653 }
654
655 return ret;
656}
657
b04e1747
SG		 658static int ucsi_register_partner_pdos(struct ucsi_connector *con)
659{
660 struct usb_power_delivery_desc desc = { con->ucsi->cap.pd_version };
661 struct usb_power_delivery_capabilities_desc caps;
662 struct usb_power_delivery_capabilities *cap;
663 int ret;
664
665 if (con->partner_pd)
666 return 0;
667
668 con->partner_pd = usb_power_delivery_register(NULL, &desc);
669 if (IS_ERR(con->partner_pd))
670 return PTR_ERR(con->partner_pd);
671
672 ret = ucsi_get_pdos(con, TYPEC_SOURCE, 1, caps.pdo);
673 if (ret > 0) {
674 if (ret < PDO_MAX_OBJECTS)
675 caps.pdo[ret] = 0;
676
677 caps.role = TYPEC_SOURCE;
678 cap = usb_power_delivery_register_capabilities(con->partner_pd, &caps);
679 if (IS_ERR(cap))
680 return PTR_ERR(cap);
681
682 con->partner_source_caps = cap;
683
684 ret = typec_partner_set_usb_power_delivery(con->partner, con->partner_pd);
685 if (ret) {
686 usb_power_delivery_unregister_capabilities(con->partner_source_caps);
687 return ret;
688 }
689 }
690
691 ret = ucsi_get_pdos(con, TYPEC_SINK, 1, caps.pdo);
692 if (ret > 0) {
693 if (ret < PDO_MAX_OBJECTS)
694 caps.pdo[ret] = 0;
695
696 caps.role = TYPEC_SINK;
697
698 cap = usb_power_delivery_register_capabilities(con->partner_pd, &caps);
699 if (IS_ERR(cap))
700 return PTR_ERR(cap);
701
702 con->partner_sink_caps = cap;
703
704 ret = typec_partner_set_usb_power_delivery(con->partner, con->partner_pd);
705 if (ret) {
706 usb_power_delivery_unregister_capabilities(con->partner_sink_caps);
707 return ret;
708 }
709 }
710
711 return 0;
712}
713
714static void ucsi_unregister_partner_pdos(struct ucsi_connector *con)
715{
716 usb_power_delivery_unregister_capabilities(con->partner_sink_caps);
717 con->partner_sink_caps = NULL;
718 usb_power_delivery_unregister_capabilities(con->partner_source_caps);
719 con->partner_source_caps = NULL;
720 usb_power_delivery_unregister(con->partner_pd);
721 con->partner_pd = NULL;
722}
723
c1b0bc2d
HK		 724static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
725{
3cf657f0 726 switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) {
c1b0bc2d 727 case UCSI_CONSTAT_PWR_OPMODE_PD:
4dbc6a4e 728 con->rdo = con->status.request_data_obj;
c1b0bc2d 729 typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_PD);
bd19ac98 730 ucsi_partner_task(con, ucsi_get_src_pdos, 30, 0);
6cbe4b2d 731 ucsi_partner_task(con, ucsi_check_altmodes, 30, 0);
b04e1747 732 ucsi_partner_task(con, ucsi_register_partner_pdos, 1, HZ);
c1b0bc2d
HK		 733 break;
734 case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5:
4dbc6a4e 735 con->rdo = 0;
c1b0bc2d
HK		 736 typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_1_5A);
737 break;
738 case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0:
4dbc6a4e 739 con->rdo = 0;
c1b0bc2d
HK		 740 typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_3_0A);
741 break;
742 default:
4dbc6a4e 743 con->rdo = 0;
c1b0bc2d
HK		 744 typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_USB);
745 break;
746 }
747}
748
749static int ucsi_register_partner(struct ucsi_connector *con)
750{
3cf657f0 751 u8 pwr_opmode = UCSI_CONSTAT_PWR_OPMODE(con->status.flags);
cf6e06cd
HK		 752 struct typec_partner_desc desc;
753 struct typec_partner *partner;
c1b0bc2d
HK		 754
755 if (con->partner)
756 return 0;
757
cf6e06cd 758 memset(&desc, 0, sizeof(desc));
c1b0bc2d 759
3cf657f0 760 switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
c1b0bc2d 761 case UCSI_CONSTAT_PARTNER_TYPE_DEBUG:
cf6e06cd 762 desc.accessory = TYPEC_ACCESSORY_DEBUG;
c1b0bc2d
HK		 763 break;
764 case UCSI_CONSTAT_PARTNER_TYPE_AUDIO:
cf6e06cd 765 desc.accessory = TYPEC_ACCESSORY_AUDIO;
c1b0bc2d
HK		 766 break;
767 default:
768 break;
769 }
770
3cf657f0 771 desc.usb_pd = pwr_opmode == UCSI_CONSTAT_PWR_OPMODE_PD;
c1b0bc2d 772
cf6e06cd
HK		 773 partner = typec_register_partner(con->port, &desc);
774 if (IS_ERR(partner)) {
775 dev_err(con->ucsi->dev,
776 "con%d: failed to register partner (%ld)\n", con->num,
777 PTR_ERR(partner));
778 return PTR_ERR(partner);
c1b0bc2d
HK		 779 }
780
cf6e06cd
HK		 781 con->partner = partner;
782
c1b0bc2d
HK		 783 return 0;
784}
785
786static void ucsi_unregister_partner(struct ucsi_connector *con)
787{
cf6e06cd
HK		 788 if (!con->partner)
789 return;
790
71c47ad8
NA		 791 typec_set_mode(con->port, TYPEC_STATE_SAFE);
792
dddb91cd 793 typec_partner_set_usb_power_delivery(con->partner, NULL);
b04e1747 794 ucsi_unregister_partner_pdos(con);
ad74b864 795 ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP);
c1b0bc2d
HK		 796 typec_unregister_partner(con->partner);
797 con->partner = NULL;
798}
799
ad74b864
HK		 800static void ucsi_partner_change(struct ucsi_connector *con)
801{
89795852 802 enum usb_role u_role = USB_ROLE_NONE;
ad74b864
HK		 803 int ret;
804
3cf657f0 805 switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
ad74b864 806 case UCSI_CONSTAT_PARTNER_TYPE_UFP:
91813ef8 807 case UCSI_CONSTAT_PARTNER_TYPE_CABLE_AND_UFP:
89795852
MR		 808 u_role = USB_ROLE_HOST;
809 fallthrough;
810 case UCSI_CONSTAT_PARTNER_TYPE_CABLE:
ad74b864
HK		 811 typec_set_data_role(con->port, TYPEC_HOST);
812 break;
813 case UCSI_CONSTAT_PARTNER_TYPE_DFP:
89795852 814 u_role = USB_ROLE_DEVICE;
ad74b864
HK		 815 typec_set_data_role(con->port, TYPEC_DEVICE);
816 break;
817 default:
818 break;
819 }
820
25a2bc21
NA		 821 if (con->status.flags & UCSI_CONSTAT_CONNECTED) {
822 switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
823 case UCSI_CONSTAT_PARTNER_TYPE_DEBUG:
824 typec_set_mode(con->port, TYPEC_MODE_DEBUG);
825 break;
826 case UCSI_CONSTAT_PARTNER_TYPE_AUDIO:
827 typec_set_mode(con->port, TYPEC_MODE_AUDIO);
828 break;
829 default:
830 if (UCSI_CONSTAT_PARTNER_FLAGS(con->status.flags) ==
831 UCSI_CONSTAT_PARTNER_FLAG_USB)
832 typec_set_mode(con->port, TYPEC_STATE_USB);
833 }
25a2bc21
NA		 834 }
835
89795852
MR		 836 /* Only notify USB controller if partner supports USB data */
837 if (!(UCSI_CONSTAT_PARTNER_FLAGS(con->status.flags) & UCSI_CONSTAT_PARTNER_FLAG_USB))
838 u_role = USB_ROLE_NONE;
839
840 ret = usb_role_switch_set_role(con->usb_role_sw, u_role);
841 if (ret)
842 dev_err(con->ucsi->dev, "con:%d: failed to set usb role:%d\n",
843 con->num, u_role);
ad74b864
HK		 844}
845
512df95b
HK		 846static int ucsi_check_connection(struct ucsi_connector *con)
847{
99f6d436 848 u8 prev_flags = con->status.flags;
512df95b
HK		 849 u64 command;
850 int ret;
851
852 command = UCSI_GET_CONNECTOR_STATUS | UCSI_CONNECTOR_NUMBER(con->num);
853 ret = ucsi_send_command(con->ucsi, command, &con->status, sizeof(con->status));
854 if (ret < 0) {
855 dev_err(con->ucsi->dev, "GET_CONNECTOR_STATUS failed (%d)\n", ret);
856 return ret;
857 }
858
99f6d436
HK		 859 if (con->status.flags == prev_flags)
860 return 0;
861
512df95b 862 if (con->status.flags & UCSI_CONSTAT_CONNECTED) {
99f6d436
HK		 863 ucsi_register_partner(con);
864 ucsi_pwr_opmode_change(con);
865 ucsi_partner_change(con);
512df95b
HK		 866 } else {
867 ucsi_partner_change(con);
868 ucsi_port_psy_changed(con);
869 ucsi_unregister_partner(con);
870 }
871
872 return 0;
873}
874
bdc62f2b 875static void ucsi_handle_connector_change(struct work_struct *work)
c1b0bc2d
HK		 876{
877 struct ucsi_connector *con = container_of(work, struct ucsi_connector,
878 work);
879 struct ucsi *ucsi = con->ucsi;
3cf657f0 880 enum typec_role role;
470ce43a 881 u64 command;
c1b0bc2d
HK		 882 int ret;
883
ad74b864 884 mutex_lock(&con->lock);
c1b0bc2d 885
470ce43a 886 command = UCSI_GET_CONNECTOR_STATUS | UCSI_CONNECTOR_NUMBER(con->num);
512df95b 887 ret = ucsi_send_command(ucsi, command, &con->status, sizeof(con->status));
c1b0bc2d
HK		 888 if (ret < 0) {
889 dev_err(ucsi->dev, "%s: GET_CONNECTOR_STATUS failed (%d)\n",
890 __func__, ret);
a00e197d 891 clear_bit(EVENT_PENDING, &con->ucsi->flags);
c1b0bc2d
HK		 892 goto out_unlock;
893 }
217504a0 894
512df95b 895 trace_ucsi_connector_change(con->num, &con->status);
c1b0bc2d 896
3cf657f0
HK		 897 role = !!(con->status.flags & UCSI_CONSTAT_PWR_DIR);
898
c1b0bc2d 899 if (con->status.change & UCSI_CONSTAT_POWER_DIR_CHANGE) {
3cf657f0 900 typec_set_pwr_role(con->port, role);
c1b0bc2d
HK		 901
902 /* Complete pending power role swap */
903 if (!completion_done(&con->complete))
904 complete(&con->complete);
905 }
906
c1b0bc2d 907 if (con->status.change & UCSI_CONSTAT_CONNECT_CHANGE) {
3cf657f0 908 typec_set_pwr_role(con->port, role);
512df95b
HK		 909 ucsi_port_psy_changed(con);
910 ucsi_partner_change(con);
68816e16 911
6cbe4b2d 912 if (con->status.flags & UCSI_CONSTAT_CONNECTED) {
c1b0bc2d 913 ucsi_register_partner(con);
512df95b 914 ucsi_partner_task(con, ucsi_check_connection, 1, HZ);
b04e1747
SG		 915
916 if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
917 UCSI_CONSTAT_PWR_OPMODE_PD)
918 ucsi_partner_task(con, ucsi_register_partner_pdos, 1, HZ);
6cbe4b2d 919 } else {
c1b0bc2d 920 ucsi_unregister_partner(con);
6cbe4b2d 921 }
c1b0bc2d
HK		 922 }
923
bd19ac98
HK		 924 if (con->status.change & UCSI_CONSTAT_POWER_OPMODE_CHANGE ||
925 con->status.change & UCSI_CONSTAT_POWER_LEVEL_CHANGE)
926 ucsi_pwr_opmode_change(con);
927
512df95b 928 if (con->partner && con->status.change & UCSI_CONSTAT_PARTNER_CHANGE) {
ad74b864
HK		 929 ucsi_partner_change(con);
930
512df95b
HK		 931 /* Complete pending data role swap */
932 if (!completion_done(&con->complete))
933 complete(&con->complete);
217504a0
BB		 934 }
935
512df95b
HK		 936 if (con->status.change & UCSI_CONSTAT_CAM_CHANGE)
937 ucsi_partner_task(con, ucsi_check_altmodes, 1, 0);
938
939 clear_bit(EVENT_PENDING, &con->ucsi->flags);
940
c9aed03a 941 mutex_lock(&ucsi->ppm_lock);
512df95b 942 ret = ucsi_acknowledge_connector_change(ucsi);
c9aed03a 943 mutex_unlock(&ucsi->ppm_lock);
512df95b
HK		 944 if (ret)
945 dev_err(ucsi->dev, "%s: ACK failed (%d)", __func__, ret);
946
947out_unlock:
ad74b864 948 mutex_unlock(&con->lock);
c1b0bc2d
HK		 949}
950
bdc62f2b
HK		 951/**
952 * ucsi_connector_change - Process Connector Change Event
953 * @ucsi: UCSI Interface
954 * @num: Connector number
955 */
956void ucsi_connector_change(struct ucsi *ucsi, u8 num)
957{
958 struct ucsi_connector *con = &ucsi->connector[num - 1];
959
71a1fa0d 960 if (!(ucsi->ntfy & UCSI_ENABLE_NTFY_CONNECTOR_CHANGE)) {
497210f2 961 dev_dbg(ucsi->dev, "Bogus connector change event\n");
71a1fa0d
HK		 962 return;
963 }
964
512df95b 965 if (!test_and_set_bit(EVENT_PENDING, &ucsi->flags))
bdc62f2b
HK		 966 schedule_work(&con->work);
967}
968EXPORT_SYMBOL_GPL(ucsi_connector_change);
969
c1b0bc2d
HK		 970/* -------------------------------------------------------------------------- */
971
972static int ucsi_reset_connector(struct ucsi_connector *con, bool hard)
973{
470ce43a 974 u64 command;
c1b0bc2d 975
470ce43a
HK		 976 command = UCSI_CONNECTOR_RESET | UCSI_CONNECTOR_NUMBER(con->num);
977 command |= hard ? UCSI_CONNECTOR_RESET_HARD : 0;
c1b0bc2d 978
470ce43a 979 return ucsi_send_command(con->ucsi, command, NULL, 0);
c1b0bc2d
HK		 980}
981
982static int ucsi_reset_ppm(struct ucsi *ucsi)
983{
2ede5546 984 u64 command = UCSI_PPM_RESET;
c1b0bc2d 985 unsigned long tmo;
2ede5546 986 u32 cci;
c1b0bc2d
HK		 987 int ret;
988
25794e30
HG		 989 mutex_lock(&ucsi->ppm_lock);
990
2ede5546
HK		 991 ret = ucsi->ops->async_write(ucsi, UCSI_CONTROL, &command,
992 sizeof(command));
993 if (ret < 0)
25794e30 994 goto out;
c1b0bc2d
HK		 995
996 tmo = jiffies + msecs_to_jiffies(UCSI_TIMEOUT_MS);
997
998 do {
25794e30
HG		 999 if (time_is_before_jiffies(tmo)) {
1000 ret = -ETIMEDOUT;
1001 goto out;
1002 }
c1b0bc2d 1003
2ede5546
HK		 1004 ret = ucsi->ops->read(ucsi, UCSI_CCI, &cci, sizeof(cci));
1005 if (ret)
25794e30 1006 goto out;
c1b0bc2d
HK		 1007
1008 /* If the PPM is still doing something else, reset it again. */
2ede5546
HK		 1009 if (cci & ~UCSI_CCI_RESET_COMPLETE) {
1010 ret = ucsi->ops->async_write(ucsi, UCSI_CONTROL,
1011 &command,
1012 sizeof(command));
1013 if (ret < 0)
25794e30 1014 goto out;
c1b0bc2d
HK		 1015 }
1016
c1b0bc2d 1017 msleep(20);
2ede5546 1018 } while (!(cci & UCSI_CCI_RESET_COMPLETE));
c1b0bc2d 1019
25794e30
HG		 1020out:
1021 mutex_unlock(&ucsi->ppm_lock);
1022 return ret;
c1b0bc2d
HK		 1023}
1024
470ce43a 1025static int ucsi_role_cmd(struct ucsi_connector *con, u64 command)
c1b0bc2d
HK		 1026{
1027 int ret;
1028
470ce43a 1029 ret = ucsi_send_command(con->ucsi, command, NULL, 0);
c1b0bc2d 1030 if (ret == -ETIMEDOUT) {
470ce43a 1031 u64 c;
c1b0bc2d
HK		 1032
1033 /* PPM most likely stopped responding. Resetting everything. */
1034 ucsi_reset_ppm(con->ucsi);
1035
71a1fa0d 1036 c = UCSI_SET_NOTIFICATION_ENABLE | con->ucsi->ntfy;
470ce43a 1037 ucsi_send_command(con->ucsi, c, NULL, 0);
c1b0bc2d
HK		 1038
1039 ucsi_reset_connector(con, true);
1040 }
1041
1042 return ret;
1043}
1044
6df475f8 1045static int ucsi_dr_swap(struct typec_port *port, enum typec_data_role role)
c1b0bc2d 1046{
6df475f8 1047 struct ucsi_connector *con = typec_get_drvdata(port);
3cf657f0 1048 u8 partner_type;
470ce43a 1049 u64 command;
c1b0bc2d
HK		 1050 int ret = 0;
1051
ad74b864 1052 mutex_lock(&con->lock);
c1b0bc2d 1053
ad74b864
HK		 1054 if (!con->partner) {
1055 ret = -ENOTCONN;
1056 goto out_unlock;
1057 }
c1b0bc2d 1058
3cf657f0
HK		 1059 partner_type = UCSI_CONSTAT_PARTNER_TYPE(con->status.flags);
1060 if ((partner_type == UCSI_CONSTAT_PARTNER_TYPE_DFP &&
c1b0bc2d 1061 role == TYPEC_DEVICE) ||
3cf657f0 1062 (partner_type == UCSI_CONSTAT_PARTNER_TYPE_UFP &&
c1b0bc2d
HK		 1063 role == TYPEC_HOST))
1064 goto out_unlock;
1065
e25adcca
HK		 1066 reinit_completion(&con->complete);
1067
470ce43a
HK		 1068 command = UCSI_SET_UOR | UCSI_CONNECTOR_NUMBER(con->num);
1069 command |= UCSI_SET_UOR_ROLE(role);
1070 command |= UCSI_SET_UOR_ACCEPT_ROLE_SWAPS;
1071 ret = ucsi_role_cmd(con, command);
c1b0bc2d
HK		 1072 if (ret < 0)
1073 goto out_unlock;
1074
eb5d7ff3
HK		 1075 mutex_unlock(&con->lock);
1076
c1b0bc2d 1077 if (!wait_for_completion_timeout(&con->complete,
eb5d7ff3
HK		 1078 msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS)))
1079 return -ETIMEDOUT;
1080
1081 return 0;
c1b0bc2d
HK		 1082
1083out_unlock:
ad74b864 1084 mutex_unlock(&con->lock);
c1b0bc2d 1085
eb5d7ff3 1086 return ret;
c1b0bc2d
HK		 1087}
1088
6df475f8 1089static int ucsi_pr_swap(struct typec_port *port, enum typec_role role)
c1b0bc2d 1090{
6df475f8 1091 struct ucsi_connector *con = typec_get_drvdata(port);
3cf657f0 1092 enum typec_role cur_role;
470ce43a 1093 u64 command;
c1b0bc2d
HK		 1094 int ret = 0;
1095
ad74b864 1096 mutex_lock(&con->lock);
c1b0bc2d 1097
ad74b864
HK		 1098 if (!con->partner) {
1099 ret = -ENOTCONN;
1100 goto out_unlock;
1101 }
c1b0bc2d 1102
3cf657f0
HK		 1103 cur_role = !!(con->status.flags & UCSI_CONSTAT_PWR_DIR);
1104
1105 if (cur_role == role)
c1b0bc2d
HK		 1106 goto out_unlock;
1107
e25adcca
HK		 1108 reinit_completion(&con->complete);
1109
470ce43a
HK		 1110 command = UCSI_SET_PDR | UCSI_CONNECTOR_NUMBER(con->num);
1111 command |= UCSI_SET_PDR_ROLE(role);
1112 command |= UCSI_SET_PDR_ACCEPT_ROLE_SWAPS;
1113 ret = ucsi_role_cmd(con, command);
c1b0bc2d
HK		 1114 if (ret < 0)
1115 goto out_unlock;
1116
eb5d7ff3
HK		 1117 mutex_unlock(&con->lock);
1118
c1b0bc2d 1119 if (!wait_for_completion_timeout(&con->complete,
eb5d7ff3
HK		 1120 msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS)))
1121 return -ETIMEDOUT;
1122
1123 mutex_lock(&con->lock);
c1b0bc2d
HK		 1124
1125 /* Something has gone wrong while swapping the role */
3cf657f0
HK		 1126 if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) !=
1127 UCSI_CONSTAT_PWR_OPMODE_PD) {
c1b0bc2d
HK		 1128 ucsi_reset_connector(con, true);
1129 ret = -EPROTO;
1130 }
1131
1132out_unlock:
ad74b864 1133 mutex_unlock(&con->lock);
c1b0bc2d
HK		 1134
1135 return ret;
1136}
1137
6df475f8
HK		 1138static const struct typec_operations ucsi_ops = {
1139 .dr_set = ucsi_dr_swap,
1140 .pr_set = ucsi_pr_swap
1141};
1142
b9a0866a 1143/* Caller must call fwnode_handle_put() after use */
c1b0bc2d
HK		 1144static struct fwnode_handle *ucsi_find_fwnode(struct ucsi_connector *con)
1145{
1146 struct fwnode_handle *fwnode;
1147 int i = 1;
1148
1149 device_for_each_child_node(con->ucsi->dev, fwnode)
1150 if (i++ == con->num)
1151 return fwnode;
1152 return NULL;
1153}
1154
0482c34e 1155static int ucsi_register_port(struct ucsi *ucsi, struct ucsi_connector *con)
c1b0bc2d 1156{
b04e1747
SG		 1157 struct usb_power_delivery_desc desc = { ucsi->cap.pd_version};
1158 struct usb_power_delivery_capabilities_desc pd_caps;
1159 struct usb_power_delivery_capabilities *pd_cap;
c1b0bc2d
HK		 1160 struct typec_capability *cap = &con->typec_cap;
1161 enum typec_accessory *accessory = cap->accessory;
89795852 1162 enum usb_role u_role = USB_ROLE_NONE;
470ce43a 1163 u64 command;
b9aa02ca 1164 char *name;
c1b0bc2d
HK		 1165 int ret;
1166
b9aa02ca
HK		 1167 name = kasprintf(GFP_KERNEL, "%s-con%d", dev_name(ucsi->dev), con->num);
1168 if (!name)
1169 return -ENOMEM;
1170
1171 con->wq = create_singlethread_workqueue(name);
1172 kfree(name);
1173 if (!con->wq)
1174 return -ENOMEM;
1175
bdc62f2b 1176 INIT_WORK(&con->work, ucsi_handle_connector_change);
c1b0bc2d 1177 init_completion(&con->complete);
ad74b864 1178 mutex_init(&con->lock);
fac4b863 1179 INIT_LIST_HEAD(&con->partner_tasks);
c1b0bc2d
HK		 1180 con->ucsi = ucsi;
1181
3c162511
LY		 1182 cap->fwnode = ucsi_find_fwnode(con);
1183 con->usb_role_sw = fwnode_usb_role_switch_get(cap->fwnode);
fce703a9
WC		 1184 if (IS_ERR(con->usb_role_sw))
1185 return dev_err_probe(ucsi->dev, PTR_ERR(con->usb_role_sw),
1186 "con%d: failed to get usb role switch\n", con->num);
3c162511 1187
bed97b30
HG		 1188 /* Delay other interactions with the con until registration is complete */
1189 mutex_lock(&con->lock);
1190
c1b0bc2d 1191 /* Get connector capability */
470ce43a
HK		 1192 command = UCSI_GET_CONNECTOR_CAPABILITY;
1193 command |= UCSI_CONNECTOR_NUMBER(con->num);
0ff0705a 1194 ret = ucsi_send_command(ucsi, command, &con->cap, sizeof(con->cap));
c1b0bc2d 1195 if (ret < 0)
b9a0866a 1196 goto out_unlock;
c1b0bc2d
HK		 1197
1198 if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DRP)
ceeb1625 1199 cap->data = TYPEC_PORT_DRD;
c1b0bc2d 1200 else if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DFP)
ceeb1625 1201 cap->data = TYPEC_PORT_DFP;
c1b0bc2d 1202 else if (con->cap.op_mode & UCSI_CONCAP_OPMODE_UFP)
ceeb1625
HK		 1203 cap->data = TYPEC_PORT_UFP;
1204
3cf657f0
HK		 1205 if ((con->cap.flags & UCSI_CONCAP_FLAG_PROVIDER) &&
1206 (con->cap.flags & UCSI_CONCAP_FLAG_CONSUMER))
ceeb1625 1207 cap->type = TYPEC_PORT_DRP;
3cf657f0 1208 else if (con->cap.flags & UCSI_CONCAP_FLAG_PROVIDER)
ceeb1625 1209 cap->type = TYPEC_PORT_SRC;
3cf657f0 1210 else if (con->cap.flags & UCSI_CONCAP_FLAG_CONSUMER)
ceeb1625 1211 cap->type = TYPEC_PORT_SNK;
c1b0bc2d
HK		 1212
1213 cap->revision = ucsi->cap.typec_version;
1214 cap->pd_revision = ucsi->cap.pd_version;
372adf07 1215 cap->svdm_version = SVDM_VER_2_0;
c1b0bc2d
HK		 1216 cap->prefer_role = TYPEC_NO_PREFERRED_ROLE;
1217
1218 if (con->cap.op_mode & UCSI_CONCAP_OPMODE_AUDIO_ACCESSORY)
1219 *accessory++ = TYPEC_ACCESSORY_AUDIO;
1220 if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DEBUG_ACCESSORY)
1221 *accessory = TYPEC_ACCESSORY_DEBUG;
1222
6df475f8
HK		 1223 cap->driver_data = con;
1224 cap->ops = &ucsi_ops;
c1b0bc2d 1225
992a60ed
A		 1226 ret = ucsi_register_port_psy(con);
1227 if (ret)
bed97b30 1228 goto out;
992a60ed 1229
c1b0bc2d
HK		 1230 /* Register the connector */
1231 con->port = typec_register_port(ucsi->dev, cap);
bed97b30
HG		 1232 if (IS_ERR(con->port)) {
1233 ret = PTR_ERR(con->port);
1234 goto out;
1235 }
c1b0bc2d 1236
b04e1747
SG		 1237 con->pd = usb_power_delivery_register(ucsi->dev, &desc);
1238
1239 ret = ucsi_get_pdos(con, TYPEC_SOURCE, 0, pd_caps.pdo);
1240 if (ret > 0) {
1241 if (ret < PDO_MAX_OBJECTS)
1242 pd_caps.pdo[ret] = 0;
1243
1244 pd_caps.role = TYPEC_SOURCE;
1245 pd_cap = usb_power_delivery_register_capabilities(con->pd, &pd_caps);
1246 if (IS_ERR(pd_cap)) {
1247 ret = PTR_ERR(pd_cap);
1248 goto out;
1249 }
1250
1251 con->port_source_caps = pd_cap;
1252 typec_port_set_usb_power_delivery(con->port, con->pd);
1253 }
1254
1255 memset(&pd_caps, 0, sizeof(pd_caps));
1256 ret = ucsi_get_pdos(con, TYPEC_SINK, 0, pd_caps.pdo);
1257 if (ret > 0) {
1258 if (ret < PDO_MAX_OBJECTS)
1259 pd_caps.pdo[ret] = 0;
1260
1261 pd_caps.role = TYPEC_SINK;
1262 pd_cap = usb_power_delivery_register_capabilities(con->pd, &pd_caps);
1263 if (IS_ERR(pd_cap)) {
1264 ret = PTR_ERR(pd_cap);
1265 goto out;
1266 }
1267
1268 con->port_sink_caps = pd_cap;
1269 typec_port_set_usb_power_delivery(con->port, con->pd);
1270 }
1271
ad74b864
HK		 1272 /* Alternate modes */
1273 ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_CON);
bed97b30 1274 if (ret) {
ad74b864
HK		 1275 dev_err(ucsi->dev, "con%d: failed to register alt modes\n",
1276 con->num);
bed97b30
HG		 1277 goto out;
1278 }
ad74b864 1279
c1b0bc2d 1280 /* Get the status */
470ce43a 1281 command = UCSI_GET_CONNECTOR_STATUS | UCSI_CONNECTOR_NUMBER(con->num);
0ff0705a 1282 ret = ucsi_send_command(ucsi, command, &con->status, sizeof(con->status));
c1b0bc2d
HK		 1283 if (ret < 0) {
1284 dev_err(ucsi->dev, "con%d: failed to get status\n", con->num);
bed97b30
HG		 1285 ret = 0;
1286 goto out;
c1b0bc2d 1287 }
bed97b30 1288 ret = 0; /* ucsi_send_command() returns length on success */
c1b0bc2d 1289
3cf657f0 1290 switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
c1b0bc2d 1291 case UCSI_CONSTAT_PARTNER_TYPE_UFP:
91813ef8 1292 case UCSI_CONSTAT_PARTNER_TYPE_CABLE_AND_UFP:
89795852
MR		 1293 u_role = USB_ROLE_HOST;
1294 fallthrough;
1295 case UCSI_CONSTAT_PARTNER_TYPE_CABLE:
c1b0bc2d
HK		 1296 typec_set_data_role(con->port, TYPEC_HOST);
1297 break;
1298 case UCSI_CONSTAT_PARTNER_TYPE_DFP:
89795852 1299 u_role = USB_ROLE_DEVICE;
c1b0bc2d
HK		 1300 typec_set_data_role(con->port, TYPEC_DEVICE);
1301 break;
1302 default:
1303 break;
1304 }
1305
1306 /* Check if there is already something connected */
3cf657f0
HK		 1307 if (con->status.flags & UCSI_CONSTAT_CONNECTED) {
1308 typec_set_pwr_role(con->port,
1309 !!(con->status.flags & UCSI_CONSTAT_PWR_DIR));
c1b0bc2d 1310 ucsi_register_partner(con);
b04e1747 1311 ucsi_pwr_opmode_change(con);
0e6371fb 1312 ucsi_port_psy_changed(con);
3cf657f0 1313 }
c1b0bc2d 1314
89795852
MR		 1315 /* Only notify USB controller if partner supports USB data */
1316 if (!(UCSI_CONSTAT_PARTNER_FLAGS(con->status.flags) & UCSI_CONSTAT_PARTNER_FLAG_USB))
1317 u_role = USB_ROLE_NONE;
1318
1319 ret = usb_role_switch_set_role(con->usb_role_sw, u_role);
1320 if (ret) {
1321 dev_err(ucsi->dev, "con:%d: failed to set usb role:%d\n",
1322 con->num, u_role);
1323 ret = 0;
1324 }
1325
3f345e90
HK		 1326 if (con->partner &&
1327 UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
1328 UCSI_CONSTAT_PWR_OPMODE_PD) {
bd19ac98 1329 ucsi_get_src_pdos(con);
b9aa02ca 1330 ucsi_check_altmodes(con);
bd19ac98 1331 }
ad74b864 1332
c1b0bc2d
HK		 1333 trace_ucsi_register_port(con->num, &con->status);
1334
bed97b30 1335out:
b9a0866a
AS		 1336 fwnode_handle_put(cap->fwnode);
1337out_unlock:
bed97b30 1338 mutex_unlock(&con->lock);
b9aa02ca
HK		 1339
1340 if (ret && con->wq) {
1341 destroy_workqueue(con->wq);
1342 con->wq = NULL;
1343 }
1344
bed97b30 1345 return ret;
c1b0bc2d
HK		 1346}
1347
bdc62f2b
HK		 1348/**
1349 * ucsi_init - Initialize UCSI interface
1350 * @ucsi: UCSI to be initialized
1351 *
1352 * Registers all ports @ucsi has and enables all notification events.
1353 */
e6b073de 1354static int ucsi_init(struct ucsi *ucsi)
c1b0bc2d 1355{
0482c34e 1356 struct ucsi_connector *con, *connector;
f87fb985 1357 u64 command, ntfy;
c1b0bc2d
HK		 1358 int ret;
1359 int i;
1360
c1b0bc2d
HK		 1361 /* Reset the PPM */
1362 ret = ucsi_reset_ppm(ucsi);
1363 if (ret) {
1364 dev_err(ucsi->dev, "failed to reset PPM!\n");
1365 goto err;
1366 }
1367
1368 /* Enable basic notifications */
f87fb985
HG		 1369 ntfy = UCSI_ENABLE_NTFY_CMD_COMPLETE | UCSI_ENABLE_NTFY_ERROR;
1370 command = UCSI_SET_NOTIFICATION_ENABLE | ntfy;
25794e30 1371 ret = ucsi_send_command(ucsi, command, NULL, 0);
c1b0bc2d
HK		 1372 if (ret < 0)
1373 goto err_reset;
1374
1375 /* Get PPM capabilities */
470ce43a 1376 command = UCSI_GET_CAPABILITY;
25794e30 1377 ret = ucsi_send_command(ucsi, command, &ucsi->cap, sizeof(ucsi->cap));
c1b0bc2d
HK		 1378 if (ret < 0)
1379 goto err_reset;
1380
1381 if (!ucsi->cap.num_connectors) {
1382 ret = -ENODEV;
1383 goto err_reset;
1384 }
1385
12f73979 1386 /* Allocate the connectors. Released in ucsi_unregister() */
0482c34e
HG		 1387 connector = kcalloc(ucsi->cap.num_connectors + 1, sizeof(*connector), GFP_KERNEL);
1388 if (!connector) {
c1b0bc2d
HK		 1389 ret = -ENOMEM;
1390 goto err_reset;
1391 }
1392
1393 /* Register all connectors */
1394 for (i = 0; i < ucsi->cap.num_connectors; i++) {
0482c34e
HG		 1395 connector[i].num = i + 1;
1396 ret = ucsi_register_port(ucsi, &connector[i]);
c1b0bc2d
HK		 1397 if (ret)
1398 goto err_unregister;
1399 }
1400
1401 /* Enable all notifications */
f87fb985
HG		 1402 ntfy = UCSI_ENABLE_NTFY_ALL;
1403 command = UCSI_SET_NOTIFICATION_ENABLE | ntfy;
0ff0705a 1404 ret = ucsi_send_command(ucsi, command, NULL, 0);
c1b0bc2d
HK		 1405 if (ret < 0)
1406 goto err_unregister;
1407
0482c34e 1408 ucsi->connector = connector;
f87fb985 1409 ucsi->ntfy = ntfy;
bdc62f2b 1410 return 0;
c1b0bc2d
HK		 1411
1412err_unregister:
0482c34e 1413 for (con = connector; con->port; con++) {
5f73aa2c
TI		 1414 ucsi_unregister_partner(con);
1415 ucsi_unregister_altmodes(con, UCSI_RECIPIENT_CON);
1416 ucsi_unregister_port_psy(con);
1417 if (con->wq)
1418 destroy_workqueue(con->wq);
b04e1747
SG		 1419
1420 usb_power_delivery_unregister_capabilities(con->port_sink_caps);
1421 con->port_sink_caps = NULL;
1422 usb_power_delivery_unregister_capabilities(con->port_source_caps);
1423 con->port_source_caps = NULL;
1424 usb_power_delivery_unregister(con->pd);
1425 con->pd = NULL;
5f73aa2c
TI		 1426 typec_unregister_port(con->port);
1427 con->port = NULL;
1428 }
0482c34e 1429 kfree(connector);
c1b0bc2d 1430err_reset:
f247f0a8 1431 memset(&ucsi->cap, 0, sizeof(ucsi->cap));
c1b0bc2d
HK		 1432 ucsi_reset_ppm(ucsi);
1433err:
bdc62f2b
HK		 1434 return ret;
1435}
bdc62f2b 1436
e0dced9c 1437static void ucsi_resume_work(struct work_struct *work)
99f6d436 1438{
e0dced9c 1439 struct ucsi *ucsi = container_of(work, struct ucsi, resume_work);
99f6d436
HK		 1440 struct ucsi_connector *con;
1441 u64 command;
1442 int ret;
1443
1444 /* Restore UCSI notification enable mask after system resume */
1445 command = UCSI_SET_NOTIFICATION_ENABLE | ucsi->ntfy;
1446 ret = ucsi_send_command(ucsi, command, NULL, 0);
e0dced9c
HK		 1447 if (ret < 0) {
1448 dev_err(ucsi->dev, "failed to re-enable notifications (%d)\n", ret);
1449 return;
1450 }
99f6d436
HK		 1451
1452 for (con = ucsi->connector; con->port; con++) {
1453 mutex_lock(&con->lock);
e0dced9c 1454 ucsi_partner_task(con, ucsi_check_connection, 1, 0);
99f6d436
HK		 1455 mutex_unlock(&con->lock);
1456 }
e0dced9c 1457}
99f6d436 1458
e0dced9c
HK		 1459int ucsi_resume(struct ucsi *ucsi)
1460{
f82060da
HK		 1461 if (ucsi->connector)
1462 queue_work(system_long_wq, &ucsi->resume_work);
99f6d436
HK		 1463 return 0;
1464}
1465EXPORT_SYMBOL_GPL(ucsi_resume);
1466
bdc62f2b
HK		 1467static void ucsi_init_work(struct work_struct *work)
1468{
3c162511 1469 struct ucsi *ucsi = container_of(work, struct ucsi, work.work);
bdc62f2b
HK		 1470 int ret;
1471
1472 ret = ucsi_init(ucsi);
1473 if (ret)
511b74e7 1474 dev_err_probe(ucsi->dev, ret, "PPM init failed\n");
3c162511
LY		 1475
1476 if (ret == -EPROBE_DEFER) {
511b74e7
FG		 1477 if (ucsi->work_count++ > UCSI_ROLE_SWITCH_WAIT_COUNT) {
1478 dev_err(ucsi->dev, "PPM init failed, stop trying\n");
3c162511 1479 return;
511b74e7 1480 }
3c162511
LY		 1481
1482 queue_delayed_work(system_long_wq, &ucsi->work,
1483 UCSI_ROLE_SWITCH_INTERVAL);
1484 }
c1b0bc2d
HK		 1485}
1486
1487/**
bdc62f2b
HK		 1488 * ucsi_get_drvdata - Return private driver data pointer
1489 * @ucsi: UCSI interface
c1b0bc2d 1490 */
bdc62f2b
HK		 1491void *ucsi_get_drvdata(struct ucsi *ucsi)
1492{
1493 return ucsi->driver_data;
1494}
1495EXPORT_SYMBOL_GPL(ucsi_get_drvdata);
1496
1497/**
5aff197f 1498 * ucsi_set_drvdata - Assign private driver data pointer
bdc62f2b
HK		 1499 * @ucsi: UCSI interface
1500 * @data: Private data pointer
1501 */
1502void ucsi_set_drvdata(struct ucsi *ucsi, void *data)
1503{
1504 ucsi->driver_data = data;
1505}
1506EXPORT_SYMBOL_GPL(ucsi_set_drvdata);
1507
1508/**
1509 * ucsi_create - Allocate UCSI instance
1510 * @dev: Device interface to the PPM (Platform Policy Manager)
1511 * @ops: I/O routines
1512 */
1513struct ucsi *ucsi_create(struct device *dev, const struct ucsi_operations *ops)
c1b0bc2d
HK		 1514{
1515 struct ucsi *ucsi;
1516
bdc62f2b
HK		 1517 if (!ops || !ops->read || !ops->sync_write || !ops->async_write)
1518 return ERR_PTR(-EINVAL);
1519
c1b0bc2d
HK		 1520 ucsi = kzalloc(sizeof(*ucsi), GFP_KERNEL);
1521 if (!ucsi)
1522 return ERR_PTR(-ENOMEM);
1523
e0dced9c 1524 INIT_WORK(&ucsi->resume_work, ucsi_resume_work);
3c162511 1525 INIT_DELAYED_WORK(&ucsi->work, ucsi_init_work);
c1b0bc2d 1526 mutex_init(&ucsi->ppm_lock);
c1b0bc2d 1527 ucsi->dev = dev;
bdc62f2b
HK		 1528 ucsi->ops = ops;
1529
1530 return ucsi;
1531}
1532EXPORT_SYMBOL_GPL(ucsi_create);
1533
1534/**
1535 * ucsi_destroy - Free UCSI instance
1536 * @ucsi: UCSI instance to be freed
1537 */
1538void ucsi_destroy(struct ucsi *ucsi)
1539{
df0383ff 1540 ucsi_debugfs_unregister(ucsi);
bdc62f2b
HK		 1541 kfree(ucsi);
1542}
1543EXPORT_SYMBOL_GPL(ucsi_destroy);
1544
1545/**
1546 * ucsi_register - Register UCSI interface
1547 * @ucsi: UCSI instance
1548 */
1549int ucsi_register(struct ucsi *ucsi)
1550{
1551 int ret;
1552
1553 ret = ucsi->ops->read(ucsi, UCSI_VERSION, &ucsi->version,
1554 sizeof(ucsi->version));
1555 if (ret)
1556 return ret;
1557
1558 if (!ucsi->version)
1559 return -ENODEV;
c1b0bc2d 1560
3c162511 1561 queue_delayed_work(system_long_wq, &ucsi->work, 0);
c1b0bc2d 1562
df0383ff 1563 ucsi_debugfs_register(ucsi);
bdc62f2b 1564 return 0;
c1b0bc2d 1565}
bdc62f2b 1566EXPORT_SYMBOL_GPL(ucsi_register);
c1b0bc2d
HK		 1567
1568/**
bdc62f2b
HK		 1569 * ucsi_unregister - Unregister UCSI interface
1570 * @ucsi: UCSI interface to be unregistered
c1b0bc2d 1571 *
bdc62f2b 1572 * Unregister UCSI interface that was created with ucsi_register().
c1b0bc2d 1573 */
bdc62f2b 1574void ucsi_unregister(struct ucsi *ucsi)
c1b0bc2d 1575{
74ce3e41 1576 u64 cmd = UCSI_SET_NOTIFICATION_ENABLE;
5f73aa2c 1577 int i;
c1b0bc2d
HK		 1578
1579 /* Make sure that we are not in the middle of driver initialization */
3c162511 1580 cancel_delayed_work_sync(&ucsi->work);
e0dced9c 1581 cancel_work_sync(&ucsi->resume_work);
c1b0bc2d 1582
74ce3e41
HK		 1583 /* Disable notifications */
1584 ucsi->ops->async_write(ucsi, UCSI_CONTROL, &cmd, sizeof(cmd));
c1b0bc2d 1585
f82060da
HK		 1586 if (!ucsi->connector)
1587 return;
1588
5f73aa2c
TI		 1589 for (i = 0; i < ucsi->cap.num_connectors; i++) {
1590 cancel_work_sync(&ucsi->connector[i].work);
1591 ucsi_unregister_partner(&ucsi->connector[i]);
1592 ucsi_unregister_altmodes(&ucsi->connector[i],
1593 UCSI_RECIPIENT_CON);
1594 ucsi_unregister_port_psy(&ucsi->connector[i]);
fac4b863
JP		 1595
1596 if (ucsi->connector[i].wq) {
1597 struct ucsi_work *uwork;
1598
1599 mutex_lock(&ucsi->connector[i].lock);
1600 /*
1601 * queue delayed items immediately so they can execute
1602 * and free themselves before the wq is destroyed
1603 */
1604 list_for_each_entry(uwork, &ucsi->connector[i].partner_tasks, node)
1605 mod_delayed_work(ucsi->connector[i].wq, &uwork->work, 0);
1606 mutex_unlock(&ucsi->connector[i].lock);
5f73aa2c 1607 destroy_workqueue(ucsi->connector[i].wq);
fac4b863 1608 }
e3e9fc7f 1609
b04e1747
SG		 1610 usb_power_delivery_unregister_capabilities(ucsi->connector[i].port_sink_caps);
1611 ucsi->connector[i].port_sink_caps = NULL;
1612 usb_power_delivery_unregister_capabilities(ucsi->connector[i].port_source_caps);
1613 ucsi->connector[i].port_source_caps = NULL;
1614 usb_power_delivery_unregister(ucsi->connector[i].pd);
1615 ucsi->connector[i].pd = NULL;
5f73aa2c
TI		 1616 typec_unregister_port(ucsi->connector[i].port);
1617 }
1618
1619 kfree(ucsi->connector);
bdc62f2b
HK		 1620}
1621EXPORT_SYMBOL_GPL(ucsi_unregister);
1622
df0383ff
SG		 1623static int __init ucsi_module_init(void)
1624{
1625 ucsi_debugfs_init();
1626 return 0;
1627}
1628module_init(ucsi_module_init);
1629
1630static void __exit ucsi_module_exit(void)
1631{
1632 ucsi_debugfs_exit();
1633}
1634module_exit(ucsi_module_exit);
1635
c1b0bc2d
HK		 1636MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
1637MODULE_LICENSE("GPL v2");
1638MODULE_DESCRIPTION("USB Type-C Connector System Software Interface driver");
Linux 6.x block layer and io_uring tree(s)