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7
8#include <linux/completion.h>
9#include <linux/debugfs.h>
10#include <linux/device.h>
11#include <linux/jiffies.h>
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/mutex.h>
15#include <linux/power_supply.h>
16#include <linux/proc_fs.h>
17#include <linux/property.h>
18#include <linux/sched/clock.h>
19#include <linux/seq_file.h>
20#include <linux/slab.h>
21#include <linux/spinlock.h>
22#include <linux/usb/pd.h>
23#include <linux/usb/pd_ado.h>
24#include <linux/usb/pd_bdo.h>
25#include <linux/usb/pd_ext_sdb.h>
26#include <linux/usb/pd_vdo.h>
27#include <linux/usb/role.h>
28#include <linux/usb/tcpm.h>
29#include <linux/usb/typec_altmode.h>
30#include <linux/workqueue.h>
31
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_SEND_CAPABILITIES_TIMEOUT), \
41 S(SRC_NEGOTIATE_CAPABILITIES), \
42 S(SRC_TRANSITION_SUPPLY), \
43 S(SRC_READY), \
44 S(SRC_WAIT_NEW_CAPABILITIES), \
45 \
46 S(SNK_UNATTACHED), \
47 S(SNK_ATTACH_WAIT), \
48 S(SNK_DEBOUNCED), \
49 S(SNK_ATTACHED), \
50 S(SNK_STARTUP), \
51 S(SNK_DISCOVERY), \
52 S(SNK_DISCOVERY_DEBOUNCE), \
53 S(SNK_DISCOVERY_DEBOUNCE_DONE), \
54 S(SNK_WAIT_CAPABILITIES), \
55 S(SNK_NEGOTIATE_CAPABILITIES), \
56 S(SNK_NEGOTIATE_PPS_CAPABILITIES), \
57 S(SNK_TRANSITION_SINK), \
58 S(SNK_TRANSITION_SINK_VBUS), \
59 S(SNK_READY), \
60 \
61 S(ACC_UNATTACHED), \
62 S(DEBUG_ACC_ATTACHED), \
63 S(AUDIO_ACC_ATTACHED), \
64 S(AUDIO_ACC_DEBOUNCE), \
65 \
66 S(HARD_RESET_SEND), \
67 S(HARD_RESET_START), \
68 S(SRC_HARD_RESET_VBUS_OFF), \
69 S(SRC_HARD_RESET_VBUS_ON), \
70 S(SNK_HARD_RESET_SINK_OFF), \
71 S(SNK_HARD_RESET_WAIT_VBUS), \
72 S(SNK_HARD_RESET_SINK_ON), \
73 \
74 S(SOFT_RESET), \
75 S(SOFT_RESET_SEND), \
76 \
77 S(DR_SWAP_ACCEPT), \
78 S(DR_SWAP_SEND), \
79 S(DR_SWAP_SEND_TIMEOUT), \
80 S(DR_SWAP_CANCEL), \
81 S(DR_SWAP_CHANGE_DR), \
82 \
83 S(PR_SWAP_ACCEPT), \
84 S(PR_SWAP_SEND), \
85 S(PR_SWAP_SEND_TIMEOUT), \
86 S(PR_SWAP_CANCEL), \
87 S(PR_SWAP_START), \
88 S(PR_SWAP_SRC_SNK_TRANSITION_OFF), \
89 S(PR_SWAP_SRC_SNK_SOURCE_OFF), \
90 S(PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED), \
91 S(PR_SWAP_SRC_SNK_SINK_ON), \
92 S(PR_SWAP_SNK_SRC_SINK_OFF), \
93 S(PR_SWAP_SNK_SRC_SOURCE_ON), \
94 S(PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP), \
95 \
96 S(VCONN_SWAP_ACCEPT), \
97 S(VCONN_SWAP_SEND), \
98 S(VCONN_SWAP_SEND_TIMEOUT), \
99 S(VCONN_SWAP_CANCEL), \
100 S(VCONN_SWAP_START), \
101 S(VCONN_SWAP_WAIT_FOR_VCONN), \
102 S(VCONN_SWAP_TURN_ON_VCONN), \
103 S(VCONN_SWAP_TURN_OFF_VCONN), \
104 \
105 S(SNK_TRY), \
106 S(SNK_TRY_WAIT), \
107 S(SNK_TRY_WAIT_DEBOUNCE), \
108 S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \
109 S(SRC_TRYWAIT), \
110 S(SRC_TRYWAIT_DEBOUNCE), \
111 S(SRC_TRYWAIT_UNATTACHED), \
112 \
113 S(SRC_TRY), \
114 S(SRC_TRY_WAIT), \
115 S(SRC_TRY_DEBOUNCE), \
116 S(SNK_TRYWAIT), \
117 S(SNK_TRYWAIT_DEBOUNCE), \
118 S(SNK_TRYWAIT_VBUS), \
119 S(BIST_RX), \
120 \
121 S(GET_STATUS_SEND), \
122 S(GET_STATUS_SEND_TIMEOUT), \
123 S(GET_PPS_STATUS_SEND), \
124 S(GET_PPS_STATUS_SEND_TIMEOUT), \
125 \
126 S(ERROR_RECOVERY), \
127 S(PORT_RESET), \
128 S(PORT_RESET_WAIT_OFF)
129
130#define GENERATE_ENUM(e) e
131#define GENERATE_STRING(s) #s
132
133enum tcpm_state {
134 FOREACH_STATE(GENERATE_ENUM)
135};
136
137static const char * const tcpm_states[] = {
138 FOREACH_STATE(GENERATE_STRING)
139};
140
141enum vdm_states {
142 VDM_STATE_ERR_BUSY = -3,
143 VDM_STATE_ERR_SEND = -2,
144 VDM_STATE_ERR_TMOUT = -1,
145 VDM_STATE_DONE = 0,
146
147 VDM_STATE_READY = 1,
148 VDM_STATE_BUSY = 2,
149 VDM_STATE_WAIT_RSP_BUSY = 3,
150};
151
152enum pd_msg_request {
153 PD_MSG_NONE = 0,
154 PD_MSG_CTRL_REJECT,
155 PD_MSG_CTRL_WAIT,
156 PD_MSG_CTRL_NOT_SUPP,
157 PD_MSG_DATA_SINK_CAP,
158 PD_MSG_DATA_SOURCE_CAP,
159};
160
161
162
163#define TCPM_CC_EVENT BIT(0)
164#define TCPM_VBUS_EVENT BIT(1)
165#define TCPM_RESET_EVENT BIT(2)
166
167#define LOG_BUFFER_ENTRIES 1024
168#define LOG_BUFFER_ENTRY_SIZE 128
169
170
171
172#define SVID_DISCOVERY_MAX 16
173#define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX)
174
175struct pd_mode_data {
176 int svid_index;
177 int nsvids;
178 u16 svids[SVID_DISCOVERY_MAX];
179 int altmodes;
180 struct typec_altmode_desc altmode_desc[ALTMODE_DISCOVERY_MAX];
181};
182
183struct pd_pps_data {
184 u32 min_volt;
185 u32 max_volt;
186 u32 max_curr;
187 u32 out_volt;
188 u32 op_curr;
189 bool supported;
190 bool active;
191};
192
193struct tcpm_port {
194 struct device *dev;
195
196 struct mutex lock;
197 struct workqueue_struct *wq;
198
199 struct typec_capability typec_caps;
200 struct typec_port *typec_port;
201
202 struct tcpc_dev *tcpc;
203 struct usb_role_switch *role_sw;
204
205 enum typec_role vconn_role;
206 enum typec_role pwr_role;
207 enum typec_data_role data_role;
208 enum typec_pwr_opmode pwr_opmode;
209
210 struct usb_pd_identity partner_ident;
211 struct typec_partner_desc partner_desc;
212 struct typec_partner *partner;
213
214 enum typec_cc_status cc_req;
215
216 enum typec_cc_status cc1;
217 enum typec_cc_status cc2;
218 enum typec_cc_polarity polarity;
219
220 bool attached;
221 bool connected;
222 enum typec_port_type port_type;
223 bool vbus_present;
224 bool vbus_never_low;
225 bool vbus_source;
226 bool vbus_charge;
227
228 bool send_discover;
229 bool op_vsafe5v;
230
231 int try_role;
232 int try_snk_count;
233 int try_src_count;
234
235 enum pd_msg_request queued_message;
236
237 enum tcpm_state enter_state;
238 enum tcpm_state prev_state;
239 enum tcpm_state state;
240 enum tcpm_state delayed_state;
241 unsigned long delayed_runtime;
242 unsigned long delay_ms;
243
244 spinlock_t pd_event_lock;
245 u32 pd_events;
246
247 struct work_struct event_work;
248 struct delayed_work state_machine;
249 struct delayed_work vdm_state_machine;
250 bool state_machine_running;
251
252 struct completion tx_complete;
253 enum tcpm_transmit_status tx_status;
254
255 struct mutex swap_lock;
256 bool swap_pending;
257 bool non_pd_role_swap;
258 struct completion swap_complete;
259 int swap_status;
260
261 unsigned int negotiated_rev;
262 unsigned int message_id;
263 unsigned int caps_count;
264 unsigned int hard_reset_count;
265 bool pd_capable;
266 bool explicit_contract;
267 unsigned int rx_msgid;
268
269
270 u32 sink_request;
271 u32 source_caps[PDO_MAX_OBJECTS];
272 unsigned int nr_source_caps;
273 u32 sink_caps[PDO_MAX_OBJECTS];
274 unsigned int nr_sink_caps;
275
276
277 u32 src_pdo[PDO_MAX_OBJECTS];
278 unsigned int nr_src_pdo;
279 u32 snk_pdo[PDO_MAX_OBJECTS];
280 unsigned int nr_snk_pdo;
281 u32 snk_vdo[VDO_MAX_OBJECTS];
282 unsigned int nr_snk_vdo;
283
284 unsigned int operating_snk_mw;
285 bool update_sink_caps;
286
287
288 u32 current_limit;
289 u32 supply_voltage;
290
291
292 struct power_supply *psy;
293 struct power_supply_desc psy_desc;
294 enum power_supply_usb_type usb_type;
295
296 u32 bist_request;
297
298
299 enum vdm_states vdm_state;
300 u32 vdm_retries;
301
302 u32 vdo_data[VDO_MAX_SIZE];
303 u8 vdo_count;
304
305 u32 vdo_retry;
306
307
308 struct pd_pps_data pps_data;
309 struct completion pps_complete;
310 bool pps_pending;
311 int pps_status;
312
313
314 struct pd_mode_data mode_data;
315 struct typec_altmode *partner_altmode[ALTMODE_DISCOVERY_MAX];
316 struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX];
317
318
319 unsigned long max_wait;
320
321
322 bool self_powered;
323
324#ifdef CONFIG_DEBUG_FS
325 struct dentry *dentry;
326 struct mutex logbuffer_lock;
327 int logbuffer_head;
328 int logbuffer_tail;
329 u8 *logbuffer[LOG_BUFFER_ENTRIES];
330#endif
331};
332
333struct pd_rx_event {
334 struct work_struct work;
335 struct tcpm_port *port;
336 struct pd_message msg;
337};
338
339#define tcpm_cc_is_sink(cc) \
340 ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \
341 (cc) == TYPEC_CC_RP_3_0)
342
343#define tcpm_port_is_sink(port) \
344 ((tcpm_cc_is_sink((port)->cc1) && !tcpm_cc_is_sink((port)->cc2)) || \
345 (tcpm_cc_is_sink((port)->cc2) && !tcpm_cc_is_sink((port)->cc1)))
346
347#define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD)
348#define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA)
349#define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN)
350
351#define tcpm_port_is_source(port) \
352 ((tcpm_cc_is_source((port)->cc1) && \
353 !tcpm_cc_is_source((port)->cc2)) || \
354 (tcpm_cc_is_source((port)->cc2) && \
355 !tcpm_cc_is_source((port)->cc1)))
356
357#define tcpm_port_is_debug(port) \
358 (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2))
359
360#define tcpm_port_is_audio(port) \
361 (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2))
362
363#define tcpm_port_is_audio_detached(port) \
364 ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \
365 (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1)))
366
367#define tcpm_try_snk(port) \
368 ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \
369 (port)->port_type == TYPEC_PORT_DRP)
370
371#define tcpm_try_src(port) \
372 ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \
373 (port)->port_type == TYPEC_PORT_DRP)
374
375static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
376{
377 if (port->port_type == TYPEC_PORT_DRP) {
378 if (port->try_role == TYPEC_SINK)
379 return SNK_UNATTACHED;
380 else if (port->try_role == TYPEC_SOURCE)
381 return SRC_UNATTACHED;
382 else if (port->tcpc->config->default_role == TYPEC_SINK)
383 return SNK_UNATTACHED;
384
385 } else if (port->port_type == TYPEC_PORT_SNK) {
386 return SNK_UNATTACHED;
387 }
388 return SRC_UNATTACHED;
389}
390
391static inline
392struct tcpm_port *typec_cap_to_tcpm(const struct typec_capability *cap)
393{
394 return container_of(cap, struct tcpm_port, typec_caps);
395}
396
397static bool tcpm_port_is_disconnected(struct tcpm_port *port)
398{
399 return (!port->attached && port->cc1 == TYPEC_CC_OPEN &&
400 port->cc2 == TYPEC_CC_OPEN) ||
401 (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 &&
402 port->cc1 == TYPEC_CC_OPEN) ||
403 (port->polarity == TYPEC_POLARITY_CC2 &&
404 port->cc2 == TYPEC_CC_OPEN)));
405}
406
407
408
409
410
411#ifdef CONFIG_DEBUG_FS
412
413static bool tcpm_log_full(struct tcpm_port *port)
414{
415 return port->logbuffer_tail ==
416 (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
417}
418
419__printf(2, 0)
420static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args)
421{
422 char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
423 u64 ts_nsec = local_clock();
424 unsigned long rem_nsec;
425
426 mutex_lock(&port->logbuffer_lock);
427 if (!port->logbuffer[port->logbuffer_head]) {
428 port->logbuffer[port->logbuffer_head] =
429 kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
430 if (!port->logbuffer[port->logbuffer_head]) {
431 mutex_unlock(&port->logbuffer_lock);
432 return;
433 }
434 }
435
436 vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
437
438 if (tcpm_log_full(port)) {
439 port->logbuffer_head = max(port->logbuffer_head - 1, 0);
440 strcpy(tmpbuffer, "overflow");
441 }
442
443 if (port->logbuffer_head < 0 ||
444 port->logbuffer_head >= LOG_BUFFER_ENTRIES) {
445 dev_warn(port->dev,
446 "Bad log buffer index %d\n", port->logbuffer_head);
447 goto abort;
448 }
449
450 if (!port->logbuffer[port->logbuffer_head]) {
451 dev_warn(port->dev,
452 "Log buffer index %d is NULL\n", port->logbuffer_head);
453 goto abort;
454 }
455
456 rem_nsec = do_div(ts_nsec, 1000000000);
457 scnprintf(port->logbuffer[port->logbuffer_head],
458 LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
459 (unsigned long)ts_nsec, rem_nsec / 1000,
460 tmpbuffer);
461 port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
462
463abort:
464 mutex_unlock(&port->logbuffer_lock);
465}
466
467__printf(2, 3)
468static void tcpm_log(struct tcpm_port *port, const char *fmt, ...)
469{
470 va_list args;
471
472
473 if (tcpm_port_is_disconnected(port) &&
474 (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED ||
475 port->state == DRP_TOGGLING))
476 return;
477
478 va_start(args, fmt);
479 _tcpm_log(port, fmt, args);
480 va_end(args);
481}
482
483__printf(2, 3)
484static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...)
485{
486 va_list args;
487
488 va_start(args, fmt);
489 _tcpm_log(port, fmt, args);
490 va_end(args);
491}
492
493static void tcpm_log_source_caps(struct tcpm_port *port)
494{
495 int i;
496
497 for (i = 0; i < port->nr_source_caps; i++) {
498 u32 pdo = port->source_caps[i];
499 enum pd_pdo_type type = pdo_type(pdo);
500 char msg[64];
501
502 switch (type) {
503 case PDO_TYPE_FIXED:
504 scnprintf(msg, sizeof(msg),
505 "%u mV, %u mA [%s%s%s%s%s%s]",
506 pdo_fixed_voltage(pdo),
507 pdo_max_current(pdo),
508 (pdo & PDO_FIXED_DUAL_ROLE) ?
509 "R" : "",
510 (pdo & PDO_FIXED_SUSPEND) ?
511 "S" : "",
512 (pdo & PDO_FIXED_HIGHER_CAP) ?
513 "H" : "",
514 (pdo & PDO_FIXED_USB_COMM) ?
515 "U" : "",
516 (pdo & PDO_FIXED_DATA_SWAP) ?
517 "D" : "",
518 (pdo & PDO_FIXED_EXTPOWER) ?
519 "E" : "");
520 break;
521 case PDO_TYPE_VAR:
522 scnprintf(msg, sizeof(msg),
523 "%u-%u mV, %u mA",
524 pdo_min_voltage(pdo),
525 pdo_max_voltage(pdo),
526 pdo_max_current(pdo));
527 break;
528 case PDO_TYPE_BATT:
529 scnprintf(msg, sizeof(msg),
530 "%u-%u mV, %u mW",
531 pdo_min_voltage(pdo),
532 pdo_max_voltage(pdo),
533 pdo_max_power(pdo));
534 break;
535 case PDO_TYPE_APDO:
536 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS)
537 scnprintf(msg, sizeof(msg),
538 "%u-%u mV, %u mA",
539 pdo_pps_apdo_min_voltage(pdo),
540 pdo_pps_apdo_max_voltage(pdo),
541 pdo_pps_apdo_max_current(pdo));
542 else
543 strcpy(msg, "undefined APDO");
544 break;
545 default:
546 strcpy(msg, "undefined");
547 break;
548 }
549 tcpm_log(port, " PDO %d: type %d, %s",
550 i, type, msg);
551 }
552}
553
554static int tcpm_debug_show(struct seq_file *s, void *v)
555{
556 struct tcpm_port *port = (struct tcpm_port *)s->private;
557 int tail;
558
559 mutex_lock(&port->logbuffer_lock);
560 tail = port->logbuffer_tail;
561 while (tail != port->logbuffer_head) {
562 seq_printf(s, "%s\n", port->logbuffer[tail]);
563 tail = (tail + 1) % LOG_BUFFER_ENTRIES;
564 }
565 if (!seq_has_overflowed(s))
566 port->logbuffer_tail = tail;
567 mutex_unlock(&port->logbuffer_lock);
568
569 return 0;
570}
571DEFINE_SHOW_ATTRIBUTE(tcpm_debug);
572
573static struct dentry *rootdir;
574
575static void tcpm_debugfs_init(struct tcpm_port *port)
576{
577 mutex_init(&port->logbuffer_lock);
578
579 if (!rootdir)
580 rootdir = debugfs_create_dir("tcpm", NULL);
581
582 port->dentry = debugfs_create_file(dev_name(port->dev),
583 S_IFREG | 0444, rootdir,
584 port, &tcpm_debug_fops);
585}
586
587static void tcpm_debugfs_exit(struct tcpm_port *port)
588{
589 debugfs_remove(port->dentry);
590}
591
592#else
593
594__printf(2, 3)
595static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { }
596__printf(2, 3)
597static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { }
598static void tcpm_log_source_caps(struct tcpm_port *port) { }
599static void tcpm_debugfs_init(const struct tcpm_port *port) { }
600static void tcpm_debugfs_exit(const struct tcpm_port *port) { }
601
602#endif
603
604static int tcpm_pd_transmit(struct tcpm_port *port,
605 enum tcpm_transmit_type type,
606 const struct pd_message *msg)
607{
608 unsigned long timeout;
609 int ret;
610
611 if (msg)
612 tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header));
613 else
614 tcpm_log(port, "PD TX, type: %#x", type);
615
616 reinit_completion(&port->tx_complete);
617 ret = port->tcpc->pd_transmit(port->tcpc, type, msg);
618 if (ret < 0)
619 return ret;
620
621 mutex_unlock(&port->lock);
622 timeout = wait_for_completion_timeout(&port->tx_complete,
623 msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT));
624 mutex_lock(&port->lock);
625 if (!timeout)
626 return -ETIMEDOUT;
627
628 switch (port->tx_status) {
629 case TCPC_TX_SUCCESS:
630 port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK;
631 return 0;
632 case TCPC_TX_DISCARDED:
633 return -EAGAIN;
634 case TCPC_TX_FAILED:
635 default:
636 return -EIO;
637 }
638}
639
640void tcpm_pd_transmit_complete(struct tcpm_port *port,
641 enum tcpm_transmit_status status)
642{
643 tcpm_log(port, "PD TX complete, status: %u", status);
644 port->tx_status = status;
645 complete(&port->tx_complete);
646}
647EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete);
648
649static int tcpm_mux_set(struct tcpm_port *port, int state,
650 enum usb_role usb_role,
651 enum typec_orientation orientation)
652{
653 int ret;
654
655 tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d",
656 state, usb_role, orientation);
657
658 ret = typec_set_orientation(port->typec_port, orientation);
659 if (ret)
660 return ret;
661
662 if (port->role_sw) {
663 ret = usb_role_switch_set_role(port->role_sw, usb_role);
664 if (ret)
665 return ret;
666 }
667
668 return typec_set_mode(port->typec_port, state);
669}
670
671static int tcpm_set_polarity(struct tcpm_port *port,
672 enum typec_cc_polarity polarity)
673{
674 int ret;
675
676 tcpm_log(port, "polarity %d", polarity);
677
678 ret = port->tcpc->set_polarity(port->tcpc, polarity);
679 if (ret < 0)
680 return ret;
681
682 port->polarity = polarity;
683
684 return 0;
685}
686
687static int tcpm_set_vconn(struct tcpm_port *port, bool enable)
688{
689 int ret;
690
691 tcpm_log(port, "vconn:=%d", enable);
692
693 ret = port->tcpc->set_vconn(port->tcpc, enable);
694 if (!ret) {
695 port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK;
696 typec_set_vconn_role(port->typec_port, port->vconn_role);
697 }
698
699 return ret;
700}
701
702static u32 tcpm_get_current_limit(struct tcpm_port *port)
703{
704 enum typec_cc_status cc;
705 u32 limit;
706
707 cc = port->polarity ? port->cc2 : port->cc1;
708 switch (cc) {
709 case TYPEC_CC_RP_1_5:
710 limit = 1500;
711 break;
712 case TYPEC_CC_RP_3_0:
713 limit = 3000;
714 break;
715 case TYPEC_CC_RP_DEF:
716 default:
717 if (port->tcpc->get_current_limit)
718 limit = port->tcpc->get_current_limit(port->tcpc);
719 else
720 limit = 0;
721 break;
722 }
723
724 return limit;
725}
726
727static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv)
728{
729 int ret = -EOPNOTSUPP;
730
731 tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma);
732
733 port->supply_voltage = mv;
734 port->current_limit = max_ma;
735
736 if (port->tcpc->set_current_limit)
737 ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv);
738
739 return ret;
740}
741
742
743
744
745
746
747static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port)
748{
749 const u32 *src_pdo = port->src_pdo;
750 int nr_pdo = port->nr_src_pdo;
751 int i;
752
753
754
755
756
757 for (i = 0; i < nr_pdo; i++) {
758 const u32 pdo = src_pdo[i];
759
760 if (pdo_type(pdo) == PDO_TYPE_FIXED &&
761 pdo_fixed_voltage(pdo) == 5000) {
762 unsigned int curr = pdo_max_current(pdo);
763
764 if (curr >= 3000)
765 return TYPEC_CC_RP_3_0;
766 else if (curr >= 1500)
767 return TYPEC_CC_RP_1_5;
768 return TYPEC_CC_RP_DEF;
769 }
770 }
771
772 return TYPEC_CC_RP_DEF;
773}
774
775static int tcpm_set_attached_state(struct tcpm_port *port, bool attached)
776{
777 return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role,
778 port->data_role);
779}
780
781static int tcpm_set_roles(struct tcpm_port *port, bool attached,
782 enum typec_role role, enum typec_data_role data)
783{
784 enum typec_orientation orientation;
785 enum usb_role usb_role;
786 int ret;
787
788 if (port->polarity == TYPEC_POLARITY_CC1)
789 orientation = TYPEC_ORIENTATION_NORMAL;
790 else
791 orientation = TYPEC_ORIENTATION_REVERSE;
792
793 if (data == TYPEC_HOST)
794 usb_role = USB_ROLE_HOST;
795 else
796 usb_role = USB_ROLE_DEVICE;
797
798 ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation);
799 if (ret < 0)
800 return ret;
801
802 ret = port->tcpc->set_roles(port->tcpc, attached, role, data);
803 if (ret < 0)
804 return ret;
805
806 port->pwr_role = role;
807 port->data_role = data;
808 typec_set_data_role(port->typec_port, data);
809 typec_set_pwr_role(port->typec_port, role);
810
811 return 0;
812}
813
814static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role)
815{
816 int ret;
817
818 ret = port->tcpc->set_roles(port->tcpc, true, role,
819 port->data_role);
820 if (ret < 0)
821 return ret;
822
823 port->pwr_role = role;
824 typec_set_pwr_role(port->typec_port, role);
825
826 return 0;
827}
828
829static int tcpm_pd_send_source_caps(struct tcpm_port *port)
830{
831 struct pd_message msg;
832 int i;
833
834 memset(&msg, 0, sizeof(msg));
835 if (!port->nr_src_pdo) {
836
837 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
838 port->pwr_role,
839 port->data_role,
840 port->negotiated_rev,
841 port->message_id, 0);
842 } else {
843 msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP,
844 port->pwr_role,
845 port->data_role,
846 port->negotiated_rev,
847 port->message_id,
848 port->nr_src_pdo);
849 }
850 for (i = 0; i < port->nr_src_pdo; i++)
851 msg.payload[i] = cpu_to_le32(port->src_pdo[i]);
852
853 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
854}
855
856static int tcpm_pd_send_sink_caps(struct tcpm_port *port)
857{
858 struct pd_message msg;
859 int i;
860
861 memset(&msg, 0, sizeof(msg));
862 if (!port->nr_snk_pdo) {
863
864 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
865 port->pwr_role,
866 port->data_role,
867 port->negotiated_rev,
868 port->message_id, 0);
869 } else {
870 msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP,
871 port->pwr_role,
872 port->data_role,
873 port->negotiated_rev,
874 port->message_id,
875 port->nr_snk_pdo);
876 }
877 for (i = 0; i < port->nr_snk_pdo; i++)
878 msg.payload[i] = cpu_to_le32(port->snk_pdo[i]);
879
880 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
881}
882
883static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state,
884 unsigned int delay_ms)
885{
886 if (delay_ms) {
887 tcpm_log(port, "pending state change %s -> %s @ %u ms",
888 tcpm_states[port->state], tcpm_states[state],
889 delay_ms);
890 port->delayed_state = state;
891 mod_delayed_work(port->wq, &port->state_machine,
892 msecs_to_jiffies(delay_ms));
893 port->delayed_runtime = jiffies + msecs_to_jiffies(delay_ms);
894 port->delay_ms = delay_ms;
895 } else {
896 tcpm_log(port, "state change %s -> %s",
897 tcpm_states[port->state], tcpm_states[state]);
898 port->delayed_state = INVALID_STATE;
899 port->prev_state = port->state;
900 port->state = state;
901
902
903
904
905
906
907 if (!port->state_machine_running)
908 mod_delayed_work(port->wq, &port->state_machine, 0);
909 }
910}
911
912static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state,
913 unsigned int delay_ms)
914{
915 if (port->enter_state == port->state)
916 tcpm_set_state(port, state, delay_ms);
917 else
918 tcpm_log(port,
919 "skipped %sstate change %s -> %s [%u ms], context state %s",
920 delay_ms ? "delayed " : "",
921 tcpm_states[port->state], tcpm_states[state],
922 delay_ms, tcpm_states[port->enter_state]);
923}
924
925static void tcpm_queue_message(struct tcpm_port *port,
926 enum pd_msg_request message)
927{
928 port->queued_message = message;
929 mod_delayed_work(port->wq, &port->state_machine, 0);
930}
931
932
933
934
935static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
936 const u32 *data, int cnt)
937{
938 port->vdo_count = cnt + 1;
939 port->vdo_data[0] = header;
940 memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt);
941
942 port->vdm_retries = 0;
943 port->vdm_state = VDM_STATE_READY;
944}
945
946static void svdm_consume_identity(struct tcpm_port *port, const __le32 *payload,
947 int cnt)
948{
949 u32 vdo = le32_to_cpu(payload[VDO_INDEX_IDH]);
950 u32 product = le32_to_cpu(payload[VDO_INDEX_PRODUCT]);
951
952 memset(&port->mode_data, 0, sizeof(port->mode_data));
953
954 port->partner_ident.id_header = vdo;
955 port->partner_ident.cert_stat = le32_to_cpu(payload[VDO_INDEX_CSTAT]);
956 port->partner_ident.product = product;
957
958 typec_partner_set_identity(port->partner);
959
960 tcpm_log(port, "Identity: %04x:%04x.%04x",
961 PD_IDH_VID(vdo),
962 PD_PRODUCT_PID(product), product & 0xffff);
963}
964
965static bool svdm_consume_svids(struct tcpm_port *port, const __le32 *payload,
966 int cnt)
967{
968 struct pd_mode_data *pmdata = &port->mode_data;
969 int i;
970
971 for (i = 1; i < cnt; i++) {
972 u32 p = le32_to_cpu(payload[i]);
973 u16 svid;
974
975 svid = (p >> 16) & 0xffff;
976 if (!svid)
977 return false;
978
979 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
980 goto abort;
981
982 pmdata->svids[pmdata->nsvids++] = svid;
983 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
984
985 svid = p & 0xffff;
986 if (!svid)
987 return false;
988
989 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
990 goto abort;
991
992 pmdata->svids[pmdata->nsvids++] = svid;
993 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
994 }
995 return true;
996abort:
997 tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX);
998 return false;
999}
1000
1001static void svdm_consume_modes(struct tcpm_port *port, const __le32 *payload,
1002 int cnt)
1003{
1004 struct pd_mode_data *pmdata = &port->mode_data;
1005 struct typec_altmode_desc *paltmode;
1006 int i;
1007
1008 if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) {
1009
1010 return;
1011 }
1012
1013 for (i = 1; i < cnt; i++) {
1014 paltmode = &pmdata->altmode_desc[pmdata->altmodes];
1015 memset(paltmode, 0, sizeof(*paltmode));
1016
1017 paltmode->svid = pmdata->svids[pmdata->svid_index];
1018 paltmode->mode = i;
1019 paltmode->vdo = le32_to_cpu(payload[i]);
1020
1021 tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x",
1022 pmdata->altmodes, paltmode->svid,
1023 paltmode->mode, paltmode->vdo);
1024
1025 pmdata->altmodes++;
1026 }
1027}
1028
1029static void tcpm_register_partner_altmodes(struct tcpm_port *port)
1030{
1031 struct pd_mode_data *modep = &port->mode_data;
1032 struct typec_altmode *altmode;
1033 int i;
1034
1035 for (i = 0; i < modep->altmodes; i++) {
1036 altmode = typec_partner_register_altmode(port->partner,
1037 &modep->altmode_desc[i]);
1038 if (!altmode)
1039 tcpm_log(port, "Failed to register partner SVID 0x%04x",
1040 modep->altmode_desc[i].svid);
1041 port->partner_altmode[i] = altmode;
1042 }
1043}
1044
1045#define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header)
1046
1047static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt,
1048 u32 *response)
1049{
1050 struct typec_altmode *adev;
1051 struct typec_altmode *pdev;
1052 struct pd_mode_data *modep;
1053 u32 p[PD_MAX_PAYLOAD];
1054 int rlen = 0;
1055 int cmd_type;
1056 int cmd;
1057 int i;
1058
1059 for (i = 0; i < cnt; i++)
1060 p[i] = le32_to_cpu(payload[i]);
1061
1062 cmd_type = PD_VDO_CMDT(p[0]);
1063 cmd = PD_VDO_CMD(p[0]);
1064
1065 tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d",
1066 p[0], cmd_type, cmd, cnt);
1067
1068 modep = &port->mode_data;
1069
1070 adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX,
1071 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1072
1073 pdev = typec_match_altmode(port->partner_altmode, ALTMODE_DISCOVERY_MAX,
1074 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1075
1076 switch (cmd_type) {
1077 case CMDT_INIT:
1078 switch (cmd) {
1079 case CMD_DISCOVER_IDENT:
1080
1081 if (port->data_role == TYPEC_DEVICE &&
1082 port->nr_snk_vdo) {
1083 for (i = 0; i < port->nr_snk_vdo; i++)
1084 response[i + 1] = port->snk_vdo[i];
1085 rlen = port->nr_snk_vdo + 1;
1086 }
1087 break;
1088 case CMD_DISCOVER_SVID:
1089 break;
1090 case CMD_DISCOVER_MODES:
1091 break;
1092 case CMD_ENTER_MODE:
1093 break;
1094 case CMD_EXIT_MODE:
1095 break;
1096 case CMD_ATTENTION:
1097
1098 typec_altmode_attention(adev, p[1]);
1099 return 0;
1100 default:
1101 break;
1102 }
1103 if (rlen >= 1) {
1104 response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK);
1105 } else if (rlen == 0) {
1106 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
1107 rlen = 1;
1108 } else {
1109 response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY);
1110 rlen = 1;
1111 }
1112 break;
1113 case CMDT_RSP_ACK:
1114
1115 if (IS_ERR_OR_NULL(port->partner))
1116 break;
1117
1118 switch (cmd) {
1119 case CMD_DISCOVER_IDENT:
1120
1121 svdm_consume_identity(port, payload, cnt);
1122 response[0] = VDO(USB_SID_PD, 1, CMD_DISCOVER_SVID);
1123 rlen = 1;
1124 break;
1125 case CMD_DISCOVER_SVID:
1126
1127 if (svdm_consume_svids(port, payload, cnt)) {
1128 response[0] = VDO(USB_SID_PD, 1,
1129 CMD_DISCOVER_SVID);
1130 rlen = 1;
1131 } else if (modep->nsvids && supports_modal(port)) {
1132 response[0] = VDO(modep->svids[0], 1,
1133 CMD_DISCOVER_MODES);
1134 rlen = 1;
1135 }
1136 break;
1137 case CMD_DISCOVER_MODES:
1138
1139 svdm_consume_modes(port, payload, cnt);
1140 modep->svid_index++;
1141 if (modep->svid_index < modep->nsvids) {
1142 u16 svid = modep->svids[modep->svid_index];
1143 response[0] = VDO(svid, 1, CMD_DISCOVER_MODES);
1144 rlen = 1;
1145 } else {
1146 tcpm_register_partner_altmodes(port);
1147 }
1148 break;
1149 case CMD_ENTER_MODE:
1150 typec_altmode_update_active(pdev, true);
1151
1152 if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
1153 response[0] = VDO(adev->svid, 1, CMD_EXIT_MODE);
1154 response[0] |= VDO_OPOS(adev->mode);
1155 return 1;
1156 }
1157 return 0;
1158 case CMD_EXIT_MODE:
1159 typec_altmode_update_active(pdev, false);
1160
1161
1162 WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB,
1163 NULL));
1164 break;
1165 default:
1166 break;
1167 }
1168 break;
1169 case CMDT_RSP_NAK:
1170 switch (cmd) {
1171 case CMD_ENTER_MODE:
1172
1173 WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB,
1174 NULL));
1175 break;
1176 default:
1177 break;
1178 }
1179 break;
1180 default:
1181 break;
1182 }
1183
1184
1185 typec_altmode_vdm(adev, p[0], &p[1], cnt);
1186
1187 return rlen;
1188}
1189
1190static void tcpm_handle_vdm_request(struct tcpm_port *port,
1191 const __le32 *payload, int cnt)
1192{
1193 int rlen = 0;
1194 u32 response[8] = { };
1195 u32 p0 = le32_to_cpu(payload[0]);
1196
1197 if (port->vdm_state == VDM_STATE_BUSY) {
1198
1199 if (PD_VDO_CMDT(p0) == CMDT_RSP_BUSY) {
1200 port->vdm_state = VDM_STATE_WAIT_RSP_BUSY;
1201 port->vdo_retry = (p0 & ~VDO_CMDT_MASK) |
1202 CMDT_INIT;
1203 mod_delayed_work(port->wq, &port->vdm_state_machine,
1204 msecs_to_jiffies(PD_T_VDM_BUSY));
1205 return;
1206 }
1207 port->vdm_state = VDM_STATE_DONE;
1208 }
1209
1210 if (PD_VDO_SVDM(p0))
1211 rlen = tcpm_pd_svdm(port, payload, cnt, response);
1212
1213 if (rlen > 0) {
1214 tcpm_queue_vdm(port, response[0], &response[1], rlen - 1);
1215 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1216 }
1217}
1218
1219static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd,
1220 const u32 *data, int count)
1221{
1222 u32 header;
1223
1224 if (WARN_ON(count > VDO_MAX_SIZE - 1))
1225 count = VDO_MAX_SIZE - 1;
1226
1227
1228 header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ?
1229 1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION), cmd);
1230 tcpm_queue_vdm(port, header, data, count);
1231
1232 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1233}
1234
1235static unsigned int vdm_ready_timeout(u32 vdm_hdr)
1236{
1237 unsigned int timeout;
1238 int cmd = PD_VDO_CMD(vdm_hdr);
1239
1240
1241 if (!PD_VDO_SVDM(vdm_hdr))
1242 return PD_T_VDM_UNSTRUCTURED;
1243
1244 switch (PD_VDO_CMDT(vdm_hdr)) {
1245 case CMDT_INIT:
1246 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1247 timeout = PD_T_VDM_WAIT_MODE_E;
1248 else
1249 timeout = PD_T_VDM_SNDR_RSP;
1250 break;
1251 default:
1252 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1253 timeout = PD_T_VDM_E_MODE;
1254 else
1255 timeout = PD_T_VDM_RCVR_RSP;
1256 break;
1257 }
1258 return timeout;
1259}
1260
1261static void vdm_run_state_machine(struct tcpm_port *port)
1262{
1263 struct pd_message msg;
1264 int i, res;
1265
1266 switch (port->vdm_state) {
1267 case VDM_STATE_READY:
1268
1269 if (!port->attached) {
1270 port->vdm_state = VDM_STATE_ERR_BUSY;
1271 break;
1272 }
1273
1274
1275
1276
1277
1278 if (port->state != SRC_READY && port->state != SNK_READY)
1279 break;
1280
1281
1282 memset(&msg, 0, sizeof(msg));
1283 msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF,
1284 port->pwr_role,
1285 port->data_role,
1286 port->negotiated_rev,
1287 port->message_id, port->vdo_count);
1288 for (i = 0; i < port->vdo_count; i++)
1289 msg.payload[i] = cpu_to_le32(port->vdo_data[i]);
1290 res = tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
1291 if (res < 0) {
1292 port->vdm_state = VDM_STATE_ERR_SEND;
1293 } else {
1294 unsigned long timeout;
1295
1296 port->vdm_retries = 0;
1297 port->vdm_state = VDM_STATE_BUSY;
1298 timeout = vdm_ready_timeout(port->vdo_data[0]);
1299 mod_delayed_work(port->wq, &port->vdm_state_machine,
1300 timeout);
1301 }
1302 break;
1303 case VDM_STATE_WAIT_RSP_BUSY:
1304 port->vdo_data[0] = port->vdo_retry;
1305 port->vdo_count = 1;
1306 port->vdm_state = VDM_STATE_READY;
1307 break;
1308 case VDM_STATE_BUSY:
1309 port->vdm_state = VDM_STATE_ERR_TMOUT;
1310 break;
1311 case VDM_STATE_ERR_SEND:
1312
1313
1314
1315
1316
1317
1318 if (port->vdm_retries < 3) {
1319 tcpm_log(port, "VDM Tx error, retry");
1320 port->vdm_retries++;
1321 port->vdm_state = VDM_STATE_READY;
1322 }
1323 break;
1324 default:
1325 break;
1326 }
1327}
1328
1329static void vdm_state_machine_work(struct work_struct *work)
1330{
1331 struct tcpm_port *port = container_of(work, struct tcpm_port,
1332 vdm_state_machine.work);
1333 enum vdm_states prev_state;
1334
1335 mutex_lock(&port->lock);
1336
1337
1338
1339
1340
1341 do {
1342 prev_state = port->vdm_state;
1343 vdm_run_state_machine(port);
1344 } while (port->vdm_state != prev_state &&
1345 port->vdm_state != VDM_STATE_BUSY);
1346
1347 mutex_unlock(&port->lock);
1348}
1349
1350enum pdo_err {
1351 PDO_NO_ERR,
1352 PDO_ERR_NO_VSAFE5V,
1353 PDO_ERR_VSAFE5V_NOT_FIRST,
1354 PDO_ERR_PDO_TYPE_NOT_IN_ORDER,
1355 PDO_ERR_FIXED_NOT_SORTED,
1356 PDO_ERR_VARIABLE_BATT_NOT_SORTED,
1357 PDO_ERR_DUPE_PDO,
1358 PDO_ERR_PPS_APDO_NOT_SORTED,
1359 PDO_ERR_DUPE_PPS_APDO,
1360};
1361
1362static const char * const pdo_err_msg[] = {
1363 [PDO_ERR_NO_VSAFE5V] =
1364 " err: source/sink caps should atleast have vSafe5V",
1365 [PDO_ERR_VSAFE5V_NOT_FIRST] =
1366 " err: vSafe5V Fixed Supply Object Shall always be the first object",
1367 [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] =
1368 " err: PDOs should be in the following order: Fixed; Battery; Variable",
1369 [PDO_ERR_FIXED_NOT_SORTED] =
1370 " err: Fixed supply pdos should be in increasing order of their fixed voltage",
1371 [PDO_ERR_VARIABLE_BATT_NOT_SORTED] =
1372 " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage",
1373 [PDO_ERR_DUPE_PDO] =
1374 " err: Variable/Batt supply pdos cannot have same min/max voltage",
1375 [PDO_ERR_PPS_APDO_NOT_SORTED] =
1376 " err: Programmable power supply apdos should be in increasing order of their maximum voltage",
1377 [PDO_ERR_DUPE_PPS_APDO] =
1378 " err: Programmable power supply apdos cannot have same min/max voltage and max current",
1379};
1380
1381static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo,
1382 unsigned int nr_pdo)
1383{
1384 unsigned int i;
1385
1386
1387 if (nr_pdo < 1)
1388 return PDO_ERR_NO_VSAFE5V;
1389
1390
1391 if (pdo_type(pdo[0]) != PDO_TYPE_FIXED ||
1392 pdo_fixed_voltage(pdo[0]) != VSAFE5V)
1393 return PDO_ERR_VSAFE5V_NOT_FIRST;
1394
1395 for (i = 1; i < nr_pdo; i++) {
1396 if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) {
1397 return PDO_ERR_PDO_TYPE_NOT_IN_ORDER;
1398 } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) {
1399 enum pd_pdo_type type = pdo_type(pdo[i]);
1400
1401 switch (type) {
1402
1403
1404
1405
1406
1407 case PDO_TYPE_FIXED:
1408 if (pdo_fixed_voltage(pdo[i]) <=
1409 pdo_fixed_voltage(pdo[i - 1]))
1410 return PDO_ERR_FIXED_NOT_SORTED;
1411 break;
1412
1413
1414
1415
1416
1417 case PDO_TYPE_VAR:
1418 case PDO_TYPE_BATT:
1419 if (pdo_min_voltage(pdo[i]) <
1420 pdo_min_voltage(pdo[i - 1]))
1421 return PDO_ERR_VARIABLE_BATT_NOT_SORTED;
1422 else if ((pdo_min_voltage(pdo[i]) ==
1423 pdo_min_voltage(pdo[i - 1])) &&
1424 (pdo_max_voltage(pdo[i]) ==
1425 pdo_min_voltage(pdo[i - 1])))
1426 return PDO_ERR_DUPE_PDO;
1427 break;
1428
1429
1430
1431
1432
1433 case PDO_TYPE_APDO:
1434 if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS)
1435 break;
1436
1437 if (pdo_pps_apdo_max_voltage(pdo[i]) <
1438 pdo_pps_apdo_max_voltage(pdo[i - 1]))
1439 return PDO_ERR_PPS_APDO_NOT_SORTED;
1440 else if (pdo_pps_apdo_min_voltage(pdo[i]) ==
1441 pdo_pps_apdo_min_voltage(pdo[i - 1]) &&
1442 pdo_pps_apdo_max_voltage(pdo[i]) ==
1443 pdo_pps_apdo_max_voltage(pdo[i - 1]) &&
1444 pdo_pps_apdo_max_current(pdo[i]) ==
1445 pdo_pps_apdo_max_current(pdo[i - 1]))
1446 return PDO_ERR_DUPE_PPS_APDO;
1447 break;
1448 default:
1449 tcpm_log_force(port, " Unknown pdo type");
1450 }
1451 }
1452 }
1453
1454 return PDO_NO_ERR;
1455}
1456
1457static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo,
1458 unsigned int nr_pdo)
1459{
1460 enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo);
1461
1462 if (err_index != PDO_NO_ERR) {
1463 tcpm_log_force(port, " %s", pdo_err_msg[err_index]);
1464 return -EINVAL;
1465 }
1466
1467 return 0;
1468}
1469
1470static int tcpm_altmode_enter(struct typec_altmode *altmode)
1471{
1472 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1473 u32 header;
1474
1475 mutex_lock(&port->lock);
1476 header = VDO(altmode->svid, 1, CMD_ENTER_MODE);
1477 header |= VDO_OPOS(altmode->mode);
1478
1479 tcpm_queue_vdm(port, header, NULL, 0);
1480 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1481 mutex_unlock(&port->lock);
1482
1483 return 0;
1484}
1485
1486static int tcpm_altmode_exit(struct typec_altmode *altmode)
1487{
1488 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1489 u32 header;
1490
1491 mutex_lock(&port->lock);
1492 header = VDO(altmode->svid, 1, CMD_EXIT_MODE);
1493 header |= VDO_OPOS(altmode->mode);
1494
1495 tcpm_queue_vdm(port, header, NULL, 0);
1496 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1497 mutex_unlock(&port->lock);
1498
1499 return 0;
1500}
1501
1502static int tcpm_altmode_vdm(struct typec_altmode *altmode,
1503 u32 header, const u32 *data, int count)
1504{
1505 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1506
1507 mutex_lock(&port->lock);
1508 tcpm_queue_vdm(port, header, data, count - 1);
1509 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1510 mutex_unlock(&port->lock);
1511
1512 return 0;
1513}
1514
1515static const struct typec_altmode_ops tcpm_altmode_ops = {
1516 .enter = tcpm_altmode_enter,
1517 .exit = tcpm_altmode_exit,
1518 .vdm = tcpm_altmode_vdm,
1519};
1520
1521
1522
1523
1524static inline enum tcpm_state ready_state(struct tcpm_port *port)
1525{
1526 if (port->pwr_role == TYPEC_SOURCE)
1527 return SRC_READY;
1528 else
1529 return SNK_READY;
1530}
1531
1532static int tcpm_pd_send_control(struct tcpm_port *port,
1533 enum pd_ctrl_msg_type type);
1534
1535static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload,
1536 int cnt)
1537{
1538 u32 p0 = le32_to_cpu(payload[0]);
1539 unsigned int type = usb_pd_ado_type(p0);
1540
1541 if (!type) {
1542 tcpm_log(port, "Alert message received with no type");
1543 return;
1544 }
1545
1546
1547 if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) {
1548 switch (port->state) {
1549 case SRC_READY:
1550 case SNK_READY:
1551 tcpm_set_state(port, GET_STATUS_SEND, 0);
1552 break;
1553 default:
1554 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1555 break;
1556 }
1557 }
1558}
1559
1560static void tcpm_pd_data_request(struct tcpm_port *port,
1561 const struct pd_message *msg)
1562{
1563 enum pd_data_msg_type type = pd_header_type_le(msg->header);
1564 unsigned int cnt = pd_header_cnt_le(msg->header);
1565 unsigned int rev = pd_header_rev_le(msg->header);
1566 unsigned int i;
1567
1568 switch (type) {
1569 case PD_DATA_SOURCE_CAP:
1570 if (port->pwr_role != TYPEC_SINK)
1571 break;
1572
1573 for (i = 0; i < cnt; i++)
1574 port->source_caps[i] = le32_to_cpu(msg->payload[i]);
1575
1576 port->nr_source_caps = cnt;
1577
1578 tcpm_log_source_caps(port);
1579
1580 tcpm_validate_caps(port, port->source_caps,
1581 port->nr_source_caps);
1582
1583
1584
1585
1586
1587
1588 if (rev == PD_REV10)
1589 break;
1590
1591 if (rev < PD_MAX_REV)
1592 port->negotiated_rev = rev;
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
1608 break;
1609 case PD_DATA_REQUEST:
1610 if (port->pwr_role != TYPEC_SOURCE ||
1611 cnt != 1) {
1612 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1613 break;
1614 }
1615
1616
1617
1618
1619
1620
1621 if (rev == PD_REV10) {
1622 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1623 break;
1624 }
1625
1626 if (rev < PD_MAX_REV)
1627 port->negotiated_rev = rev;
1628
1629 port->sink_request = le32_to_cpu(msg->payload[0]);
1630 tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0);
1631 break;
1632 case PD_DATA_SINK_CAP:
1633
1634 for (i = 0; i < cnt; i++)
1635 port->sink_caps[i] = le32_to_cpu(msg->payload[i]);
1636 port->nr_sink_caps = cnt;
1637 break;
1638 case PD_DATA_VENDOR_DEF:
1639 tcpm_handle_vdm_request(port, msg->payload, cnt);
1640 break;
1641 case PD_DATA_BIST:
1642 if (port->state == SRC_READY || port->state == SNK_READY) {
1643 port->bist_request = le32_to_cpu(msg->payload[0]);
1644 tcpm_set_state(port, BIST_RX, 0);
1645 }
1646 break;
1647 case PD_DATA_ALERT:
1648 tcpm_handle_alert(port, msg->payload, cnt);
1649 break;
1650 case PD_DATA_BATT_STATUS:
1651 case PD_DATA_GET_COUNTRY_INFO:
1652
1653 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1654 break;
1655 default:
1656 tcpm_log(port, "Unhandled data message type %#x", type);
1657 break;
1658 }
1659}
1660
1661static void tcpm_pps_complete(struct tcpm_port *port, int result)
1662{
1663 if (port->pps_pending) {
1664 port->pps_status = result;
1665 port->pps_pending = false;
1666 complete(&port->pps_complete);
1667 }
1668}
1669
1670static void tcpm_pd_ctrl_request(struct tcpm_port *port,
1671 const struct pd_message *msg)
1672{
1673 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
1674 enum tcpm_state next_state;
1675
1676 switch (type) {
1677 case PD_CTRL_GOOD_CRC:
1678 case PD_CTRL_PING:
1679 break;
1680 case PD_CTRL_GET_SOURCE_CAP:
1681 switch (port->state) {
1682 case SRC_READY:
1683 case SNK_READY:
1684 tcpm_queue_message(port, PD_MSG_DATA_SOURCE_CAP);
1685 break;
1686 default:
1687 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1688 break;
1689 }
1690 break;
1691 case PD_CTRL_GET_SINK_CAP:
1692 switch (port->state) {
1693 case SRC_READY:
1694 case SNK_READY:
1695 tcpm_queue_message(port, PD_MSG_DATA_SINK_CAP);
1696 break;
1697 default:
1698 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1699 break;
1700 }
1701 break;
1702 case PD_CTRL_GOTO_MIN:
1703 break;
1704 case PD_CTRL_PS_RDY:
1705 switch (port->state) {
1706 case SNK_TRANSITION_SINK:
1707 if (port->vbus_present) {
1708 tcpm_set_current_limit(port,
1709 port->current_limit,
1710 port->supply_voltage);
1711 port->explicit_contract = true;
1712 tcpm_set_state(port, SNK_READY, 0);
1713 } else {
1714
1715
1716
1717
1718 tcpm_set_state(port,
1719 SNK_TRANSITION_SINK_VBUS, 0);
1720 }
1721 break;
1722 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
1723 tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0);
1724 break;
1725 case PR_SWAP_SNK_SRC_SINK_OFF:
1726 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0);
1727 break;
1728 case VCONN_SWAP_WAIT_FOR_VCONN:
1729 tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0);
1730 break;
1731 default:
1732 break;
1733 }
1734 break;
1735 case PD_CTRL_REJECT:
1736 case PD_CTRL_WAIT:
1737 case PD_CTRL_NOT_SUPP:
1738 switch (port->state) {
1739 case SNK_NEGOTIATE_CAPABILITIES:
1740
1741 if (port->explicit_contract)
1742 next_state = SNK_READY;
1743 else
1744 next_state = SNK_WAIT_CAPABILITIES;
1745 tcpm_set_state(port, next_state, 0);
1746 break;
1747 case SNK_NEGOTIATE_PPS_CAPABILITIES:
1748
1749 port->pps_data.out_volt = port->supply_voltage;
1750 port->pps_data.op_curr = port->current_limit;
1751 port->pps_status = (type == PD_CTRL_WAIT ?
1752 -EAGAIN : -EOPNOTSUPP);
1753 tcpm_set_state(port, SNK_READY, 0);
1754 break;
1755 case DR_SWAP_SEND:
1756 port->swap_status = (type == PD_CTRL_WAIT ?
1757 -EAGAIN : -EOPNOTSUPP);
1758 tcpm_set_state(port, DR_SWAP_CANCEL, 0);
1759 break;
1760 case PR_SWAP_SEND:
1761 port->swap_status = (type == PD_CTRL_WAIT ?
1762 -EAGAIN : -EOPNOTSUPP);
1763 tcpm_set_state(port, PR_SWAP_CANCEL, 0);
1764 break;
1765 case VCONN_SWAP_SEND:
1766 port->swap_status = (type == PD_CTRL_WAIT ?
1767 -EAGAIN : -EOPNOTSUPP);
1768 tcpm_set_state(port, VCONN_SWAP_CANCEL, 0);
1769 break;
1770 default:
1771 break;
1772 }
1773 break;
1774 case PD_CTRL_ACCEPT:
1775 switch (port->state) {
1776 case SNK_NEGOTIATE_CAPABILITIES:
1777 port->pps_data.active = false;
1778 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
1779 break;
1780 case SNK_NEGOTIATE_PPS_CAPABILITIES:
1781 port->pps_data.active = true;
1782 port->supply_voltage = port->pps_data.out_volt;
1783 port->current_limit = port->pps_data.op_curr;
1784 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
1785 break;
1786 case SOFT_RESET_SEND:
1787 port->message_id = 0;
1788 port->rx_msgid = -1;
1789 if (port->pwr_role == TYPEC_SOURCE)
1790 next_state = SRC_SEND_CAPABILITIES;
1791 else
1792 next_state = SNK_WAIT_CAPABILITIES;
1793 tcpm_set_state(port, next_state, 0);
1794 break;
1795 case DR_SWAP_SEND:
1796 tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0);
1797 break;
1798 case PR_SWAP_SEND:
1799 tcpm_set_state(port, PR_SWAP_START, 0);
1800 break;
1801 case VCONN_SWAP_SEND:
1802 tcpm_set_state(port, VCONN_SWAP_START, 0);
1803 break;
1804 default:
1805 break;
1806 }
1807 break;
1808 case PD_CTRL_SOFT_RESET:
1809 tcpm_set_state(port, SOFT_RESET, 0);
1810 break;
1811 case PD_CTRL_DR_SWAP:
1812 if (port->port_type != TYPEC_PORT_DRP) {
1813 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1814 break;
1815 }
1816
1817
1818
1819
1820
1821 switch (port->state) {
1822 case SRC_READY:
1823 case SNK_READY:
1824 tcpm_set_state(port, DR_SWAP_ACCEPT, 0);
1825 break;
1826 default:
1827 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1828 break;
1829 }
1830 break;
1831 case PD_CTRL_PR_SWAP:
1832 if (port->port_type != TYPEC_PORT_DRP) {
1833 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1834 break;
1835 }
1836 switch (port->state) {
1837 case SRC_READY:
1838 case SNK_READY:
1839 tcpm_set_state(port, PR_SWAP_ACCEPT, 0);
1840 break;
1841 default:
1842 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1843 break;
1844 }
1845 break;
1846 case PD_CTRL_VCONN_SWAP:
1847 switch (port->state) {
1848 case SRC_READY:
1849 case SNK_READY:
1850 tcpm_set_state(port, VCONN_SWAP_ACCEPT, 0);
1851 break;
1852 default:
1853 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1854 break;
1855 }
1856 break;
1857 case PD_CTRL_GET_SOURCE_CAP_EXT:
1858 case PD_CTRL_GET_STATUS:
1859 case PD_CTRL_FR_SWAP:
1860 case PD_CTRL_GET_PPS_STATUS:
1861 case PD_CTRL_GET_COUNTRY_CODES:
1862
1863 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1864 break;
1865 default:
1866 tcpm_log(port, "Unhandled ctrl message type %#x", type);
1867 break;
1868 }
1869}
1870
1871static void tcpm_pd_ext_msg_request(struct tcpm_port *port,
1872 const struct pd_message *msg)
1873{
1874 enum pd_ext_msg_type type = pd_header_type_le(msg->header);
1875 unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header);
1876
1877 if (!(msg->ext_msg.header & PD_EXT_HDR_CHUNKED)) {
1878 tcpm_log(port, "Unchunked extended messages unsupported");
1879 return;
1880 }
1881
1882 if (data_size > PD_EXT_MAX_CHUNK_DATA) {
1883 tcpm_log(port, "Chunk handling not yet supported");
1884 return;
1885 }
1886
1887 switch (type) {
1888 case PD_EXT_STATUS:
1889
1890
1891
1892
1893 if (msg->ext_msg.data[USB_PD_EXT_SDB_EVENT_FLAGS] &
1894 USB_PD_EXT_SDB_PPS_EVENTS)
1895 tcpm_set_state(port, GET_PPS_STATUS_SEND, 0);
1896 else
1897 tcpm_set_state(port, ready_state(port), 0);
1898 break;
1899 case PD_EXT_PPS_STATUS:
1900
1901
1902
1903
1904 tcpm_set_state(port, ready_state(port), 0);
1905 break;
1906 case PD_EXT_SOURCE_CAP_EXT:
1907 case PD_EXT_GET_BATT_CAP:
1908 case PD_EXT_GET_BATT_STATUS:
1909 case PD_EXT_BATT_CAP:
1910 case PD_EXT_GET_MANUFACTURER_INFO:
1911 case PD_EXT_MANUFACTURER_INFO:
1912 case PD_EXT_SECURITY_REQUEST:
1913 case PD_EXT_SECURITY_RESPONSE:
1914 case PD_EXT_FW_UPDATE_REQUEST:
1915 case PD_EXT_FW_UPDATE_RESPONSE:
1916 case PD_EXT_COUNTRY_INFO:
1917 case PD_EXT_COUNTRY_CODES:
1918 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1919 break;
1920 default:
1921 tcpm_log(port, "Unhandled extended message type %#x", type);
1922 break;
1923 }
1924}
1925
1926static void tcpm_pd_rx_handler(struct work_struct *work)
1927{
1928 struct pd_rx_event *event = container_of(work,
1929 struct pd_rx_event, work);
1930 const struct pd_message *msg = &event->msg;
1931 unsigned int cnt = pd_header_cnt_le(msg->header);
1932 struct tcpm_port *port = event->port;
1933
1934 mutex_lock(&port->lock);
1935
1936 tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header),
1937 port->attached);
1938
1939 if (port->attached) {
1940 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
1941 unsigned int msgid = pd_header_msgid_le(msg->header);
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952 if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET)
1953 goto done;
1954 port->rx_msgid = msgid;
1955
1956
1957
1958
1959
1960 if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) ==
1961 (port->data_role == TYPEC_HOST)) {
1962 tcpm_log(port,
1963 "Data role mismatch, initiating error recovery");
1964 tcpm_set_state(port, ERROR_RECOVERY, 0);
1965 } else {
1966 if (msg->header & PD_HEADER_EXT_HDR)
1967 tcpm_pd_ext_msg_request(port, msg);
1968 else if (cnt)
1969 tcpm_pd_data_request(port, msg);
1970 else
1971 tcpm_pd_ctrl_request(port, msg);
1972 }
1973 }
1974
1975done:
1976 mutex_unlock(&port->lock);
1977 kfree(event);
1978}
1979
1980void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg)
1981{
1982 struct pd_rx_event *event;
1983
1984 event = kzalloc(sizeof(*event), GFP_ATOMIC);
1985 if (!event)
1986 return;
1987
1988 INIT_WORK(&event->work, tcpm_pd_rx_handler);
1989 event->port = port;
1990 memcpy(&event->msg, msg, sizeof(*msg));
1991 queue_work(port->wq, &event->work);
1992}
1993EXPORT_SYMBOL_GPL(tcpm_pd_receive);
1994
1995static int tcpm_pd_send_control(struct tcpm_port *port,
1996 enum pd_ctrl_msg_type type)
1997{
1998 struct pd_message msg;
1999
2000 memset(&msg, 0, sizeof(msg));
2001 msg.header = PD_HEADER_LE(type, port->pwr_role,
2002 port->data_role,
2003 port->negotiated_rev,
2004 port->message_id, 0);
2005
2006 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2007}
2008
2009
2010
2011
2012
2013
2014static bool tcpm_send_queued_message(struct tcpm_port *port)
2015{
2016 enum pd_msg_request queued_message;
2017
2018 do {
2019 queued_message = port->queued_message;
2020 port->queued_message = PD_MSG_NONE;
2021
2022 switch (queued_message) {
2023 case PD_MSG_CTRL_WAIT:
2024 tcpm_pd_send_control(port, PD_CTRL_WAIT);
2025 break;
2026 case PD_MSG_CTRL_REJECT:
2027 tcpm_pd_send_control(port, PD_CTRL_REJECT);
2028 break;
2029 case PD_MSG_CTRL_NOT_SUPP:
2030 tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP);
2031 break;
2032 case PD_MSG_DATA_SINK_CAP:
2033 tcpm_pd_send_sink_caps(port);
2034 break;
2035 case PD_MSG_DATA_SOURCE_CAP:
2036 tcpm_pd_send_source_caps(port);
2037 break;
2038 default:
2039 break;
2040 }
2041 } while (port->queued_message != PD_MSG_NONE);
2042
2043 if (port->delayed_state != INVALID_STATE) {
2044 if (time_is_after_jiffies(port->delayed_runtime)) {
2045 mod_delayed_work(port->wq, &port->state_machine,
2046 port->delayed_runtime - jiffies);
2047 return true;
2048 }
2049 port->delayed_state = INVALID_STATE;
2050 }
2051 return false;
2052}
2053
2054static int tcpm_pd_check_request(struct tcpm_port *port)
2055{
2056 u32 pdo, rdo = port->sink_request;
2057 unsigned int max, op, pdo_max, index;
2058 enum pd_pdo_type type;
2059
2060 index = rdo_index(rdo);
2061 if (!index || index > port->nr_src_pdo)
2062 return -EINVAL;
2063
2064 pdo = port->src_pdo[index - 1];
2065 type = pdo_type(pdo);
2066 switch (type) {
2067 case PDO_TYPE_FIXED:
2068 case PDO_TYPE_VAR:
2069 max = rdo_max_current(rdo);
2070 op = rdo_op_current(rdo);
2071 pdo_max = pdo_max_current(pdo);
2072
2073 if (op > pdo_max)
2074 return -EINVAL;
2075 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
2076 return -EINVAL;
2077
2078 if (type == PDO_TYPE_FIXED)
2079 tcpm_log(port,
2080 "Requested %u mV, %u mA for %u / %u mA",
2081 pdo_fixed_voltage(pdo), pdo_max, op, max);
2082 else
2083 tcpm_log(port,
2084 "Requested %u -> %u mV, %u mA for %u / %u mA",
2085 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
2086 pdo_max, op, max);
2087 break;
2088 case PDO_TYPE_BATT:
2089 max = rdo_max_power(rdo);
2090 op = rdo_op_power(rdo);
2091 pdo_max = pdo_max_power(pdo);
2092
2093 if (op > pdo_max)
2094 return -EINVAL;
2095 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
2096 return -EINVAL;
2097 tcpm_log(port,
2098 "Requested %u -> %u mV, %u mW for %u / %u mW",
2099 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
2100 pdo_max, op, max);
2101 break;
2102 default:
2103 return -EINVAL;
2104 }
2105
2106 port->op_vsafe5v = index == 1;
2107
2108 return 0;
2109}
2110
2111#define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y))
2112#define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y))
2113
2114static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo,
2115 int *src_pdo)
2116{
2117 unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0,
2118 max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0,
2119 min_snk_mv = 0;
2120 int ret = -EINVAL;
2121
2122 port->pps_data.supported = false;
2123 port->usb_type = POWER_SUPPLY_USB_TYPE_PD;
2124
2125
2126
2127
2128
2129 for (i = 0; i < port->nr_source_caps; i++) {
2130 u32 pdo = port->source_caps[i];
2131 enum pd_pdo_type type = pdo_type(pdo);
2132
2133 switch (type) {
2134 case PDO_TYPE_FIXED:
2135 max_src_mv = pdo_fixed_voltage(pdo);
2136 min_src_mv = max_src_mv;
2137 break;
2138 case PDO_TYPE_BATT:
2139 case PDO_TYPE_VAR:
2140 max_src_mv = pdo_max_voltage(pdo);
2141 min_src_mv = pdo_min_voltage(pdo);
2142 break;
2143 case PDO_TYPE_APDO:
2144 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) {
2145 port->pps_data.supported = true;
2146 port->usb_type =
2147 POWER_SUPPLY_USB_TYPE_PD_PPS;
2148 }
2149 continue;
2150 default:
2151 tcpm_log(port, "Invalid source PDO type, ignoring");
2152 continue;
2153 }
2154
2155 switch (type) {
2156 case PDO_TYPE_FIXED:
2157 case PDO_TYPE_VAR:
2158 src_ma = pdo_max_current(pdo);
2159 src_mw = src_ma * min_src_mv / 1000;
2160 break;
2161 case PDO_TYPE_BATT:
2162 src_mw = pdo_max_power(pdo);
2163 break;
2164 case PDO_TYPE_APDO:
2165 continue;
2166 default:
2167 tcpm_log(port, "Invalid source PDO type, ignoring");
2168 continue;
2169 }
2170
2171 for (j = 0; j < port->nr_snk_pdo; j++) {
2172 pdo = port->snk_pdo[j];
2173
2174 switch (pdo_type(pdo)) {
2175 case PDO_TYPE_FIXED:
2176 max_snk_mv = pdo_fixed_voltage(pdo);
2177 min_snk_mv = max_snk_mv;
2178 break;
2179 case PDO_TYPE_BATT:
2180 case PDO_TYPE_VAR:
2181 max_snk_mv = pdo_max_voltage(pdo);
2182 min_snk_mv = pdo_min_voltage(pdo);
2183 break;
2184 case PDO_TYPE_APDO:
2185 continue;
2186 default:
2187 tcpm_log(port, "Invalid sink PDO type, ignoring");
2188 continue;
2189 }
2190
2191 if (max_src_mv <= max_snk_mv &&
2192 min_src_mv >= min_snk_mv) {
2193
2194 if ((src_mw == max_mw && min_src_mv > max_mv) ||
2195 src_mw > max_mw) {
2196 *src_pdo = i;
2197 *sink_pdo = j;
2198 max_mw = src_mw;
2199 max_mv = min_src_mv;
2200 ret = 0;
2201 }
2202 }
2203 }
2204 }
2205
2206 return ret;
2207}
2208
2209#define min_pps_apdo_current(x, y) \
2210 min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y))
2211
2212static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port)
2213{
2214 unsigned int i, j, max_mw = 0, max_mv = 0;
2215 unsigned int min_src_mv, max_src_mv, src_ma, src_mw;
2216 unsigned int min_snk_mv, max_snk_mv;
2217 unsigned int max_op_mv;
2218 u32 pdo, src, snk;
2219 unsigned int src_pdo = 0, snk_pdo = 0;
2220
2221
2222
2223
2224
2225
2226 for (i = 1; i < port->nr_source_caps; ++i) {
2227 pdo = port->source_caps[i];
2228
2229 switch (pdo_type(pdo)) {
2230 case PDO_TYPE_APDO:
2231 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2232 tcpm_log(port, "Not PPS APDO (source), ignoring");
2233 continue;
2234 }
2235
2236 min_src_mv = pdo_pps_apdo_min_voltage(pdo);
2237 max_src_mv = pdo_pps_apdo_max_voltage(pdo);
2238 src_ma = pdo_pps_apdo_max_current(pdo);
2239 src_mw = (src_ma * max_src_mv) / 1000;
2240
2241
2242
2243
2244
2245
2246 for (j = 1; j < port->nr_snk_pdo; j++) {
2247 pdo = port->snk_pdo[j];
2248
2249 switch (pdo_type(pdo)) {
2250 case PDO_TYPE_APDO:
2251 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2252 tcpm_log(port,
2253 "Not PPS APDO (sink), ignoring");
2254 continue;
2255 }
2256
2257 min_snk_mv =
2258 pdo_pps_apdo_min_voltage(pdo);
2259 max_snk_mv =
2260 pdo_pps_apdo_max_voltage(pdo);
2261 break;
2262 default:
2263 tcpm_log(port,
2264 "Not APDO type (sink), ignoring");
2265 continue;
2266 }
2267
2268 if (min_src_mv <= max_snk_mv &&
2269 max_src_mv >= min_snk_mv) {
2270 max_op_mv = min(max_src_mv, max_snk_mv);
2271 src_mw = (max_op_mv * src_ma) / 1000;
2272
2273 if ((src_mw == max_mw &&
2274 max_op_mv > max_mv) ||
2275 src_mw > max_mw) {
2276 src_pdo = i;
2277 snk_pdo = j;
2278 max_mw = src_mw;
2279 max_mv = max_op_mv;
2280 }
2281 }
2282 }
2283
2284 break;
2285 default:
2286 tcpm_log(port, "Not APDO type (source), ignoring");
2287 continue;
2288 }
2289 }
2290
2291 if (src_pdo) {
2292 src = port->source_caps[src_pdo];
2293 snk = port->snk_pdo[snk_pdo];
2294
2295 port->pps_data.min_volt = max(pdo_pps_apdo_min_voltage(src),
2296 pdo_pps_apdo_min_voltage(snk));
2297 port->pps_data.max_volt = min(pdo_pps_apdo_max_voltage(src),
2298 pdo_pps_apdo_max_voltage(snk));
2299 port->pps_data.max_curr = min_pps_apdo_current(src, snk);
2300 port->pps_data.out_volt = min(port->pps_data.max_volt,
2301 max(port->pps_data.min_volt,
2302 port->pps_data.out_volt));
2303 port->pps_data.op_curr = min(port->pps_data.max_curr,
2304 port->pps_data.op_curr);
2305 }
2306
2307 return src_pdo;
2308}
2309
2310static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo)
2311{
2312 unsigned int mv, ma, mw, flags;
2313 unsigned int max_ma, max_mw;
2314 enum pd_pdo_type type;
2315 u32 pdo, matching_snk_pdo;
2316 int src_pdo_index = 0;
2317 int snk_pdo_index = 0;
2318 int ret;
2319
2320 ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index);
2321 if (ret < 0)
2322 return ret;
2323
2324 pdo = port->source_caps[src_pdo_index];
2325 matching_snk_pdo = port->snk_pdo[snk_pdo_index];
2326 type = pdo_type(pdo);
2327
2328 switch (type) {
2329 case PDO_TYPE_FIXED:
2330 mv = pdo_fixed_voltage(pdo);
2331 break;
2332 case PDO_TYPE_BATT:
2333 case PDO_TYPE_VAR:
2334 mv = pdo_min_voltage(pdo);
2335 break;
2336 default:
2337 tcpm_log(port, "Invalid PDO selected!");
2338 return -EINVAL;
2339 }
2340
2341
2342 if (type == PDO_TYPE_BATT) {
2343 mw = min_power(pdo, matching_snk_pdo);
2344 ma = 1000 * mw / mv;
2345 } else {
2346 ma = min_current(pdo, matching_snk_pdo);
2347 mw = ma * mv / 1000;
2348 }
2349
2350 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
2351
2352
2353 max_ma = ma;
2354 max_mw = mw;
2355 if (mw < port->operating_snk_mw) {
2356 flags |= RDO_CAP_MISMATCH;
2357 if (type == PDO_TYPE_BATT &&
2358 (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo)))
2359 max_mw = pdo_max_power(matching_snk_pdo);
2360 else if (pdo_max_current(matching_snk_pdo) >
2361 pdo_max_current(pdo))
2362 max_ma = pdo_max_current(matching_snk_pdo);
2363 }
2364
2365 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
2366 port->cc_req, port->cc1, port->cc2, port->vbus_source,
2367 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
2368 port->polarity);
2369
2370 if (type == PDO_TYPE_BATT) {
2371 *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags);
2372
2373 tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s",
2374 src_pdo_index, mv, mw,
2375 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
2376 } else {
2377 *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags);
2378
2379 tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s",
2380 src_pdo_index, mv, ma,
2381 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
2382 }
2383
2384 port->current_limit = ma;
2385 port->supply_voltage = mv;
2386
2387 return 0;
2388}
2389
2390static int tcpm_pd_send_request(struct tcpm_port *port)
2391{
2392 struct pd_message msg;
2393 int ret;
2394 u32 rdo;
2395
2396 ret = tcpm_pd_build_request(port, &rdo);
2397 if (ret < 0)
2398 return ret;
2399
2400 memset(&msg, 0, sizeof(msg));
2401 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
2402 port->pwr_role,
2403 port->data_role,
2404 port->negotiated_rev,
2405 port->message_id, 1);
2406 msg.payload[0] = cpu_to_le32(rdo);
2407
2408 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2409}
2410
2411static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo)
2412{
2413 unsigned int out_mv, op_ma, op_mw, max_mv, max_ma, flags;
2414 enum pd_pdo_type type;
2415 unsigned int src_pdo_index;
2416 u32 pdo;
2417
2418 src_pdo_index = tcpm_pd_select_pps_apdo(port);
2419 if (!src_pdo_index)
2420 return -EOPNOTSUPP;
2421
2422 pdo = port->source_caps[src_pdo_index];
2423 type = pdo_type(pdo);
2424
2425 switch (type) {
2426 case PDO_TYPE_APDO:
2427 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2428 tcpm_log(port, "Invalid APDO selected!");
2429 return -EINVAL;
2430 }
2431 max_mv = port->pps_data.max_volt;
2432 max_ma = port->pps_data.max_curr;
2433 out_mv = port->pps_data.out_volt;
2434 op_ma = port->pps_data.op_curr;
2435 break;
2436 default:
2437 tcpm_log(port, "Invalid PDO selected!");
2438 return -EINVAL;
2439 }
2440
2441 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
2442
2443 op_mw = (op_ma * out_mv) / 1000;
2444 if (op_mw < port->operating_snk_mw) {
2445
2446
2447
2448
2449
2450
2451 op_ma = (port->operating_snk_mw * 1000) / out_mv;
2452 if ((port->operating_snk_mw * 1000) % out_mv)
2453 ++op_ma;
2454 op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP);
2455
2456 if (op_ma > max_ma) {
2457 op_ma = max_ma;
2458 out_mv = (port->operating_snk_mw * 1000) / op_ma;
2459 if ((port->operating_snk_mw * 1000) % op_ma)
2460 ++out_mv;
2461 out_mv += RDO_PROG_VOLT_MV_STEP -
2462 (out_mv % RDO_PROG_VOLT_MV_STEP);
2463
2464 if (out_mv > max_mv) {
2465 tcpm_log(port, "Invalid PPS APDO selected!");
2466 return -EINVAL;
2467 }
2468 }
2469 }
2470
2471 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
2472 port->cc_req, port->cc1, port->cc2, port->vbus_source,
2473 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
2474 port->polarity);
2475
2476 *rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags);
2477
2478 tcpm_log(port, "Requesting APDO %d: %u mV, %u mA",
2479 src_pdo_index, out_mv, op_ma);
2480
2481 port->pps_data.op_curr = op_ma;
2482 port->pps_data.out_volt = out_mv;
2483
2484 return 0;
2485}
2486
2487static int tcpm_pd_send_pps_request(struct tcpm_port *port)
2488{
2489 struct pd_message msg;
2490 int ret;
2491 u32 rdo;
2492
2493 ret = tcpm_pd_build_pps_request(port, &rdo);
2494 if (ret < 0)
2495 return ret;
2496
2497 memset(&msg, 0, sizeof(msg));
2498 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
2499 port->pwr_role,
2500 port->data_role,
2501 port->negotiated_rev,
2502 port->message_id, 1);
2503 msg.payload[0] = cpu_to_le32(rdo);
2504
2505 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2506}
2507
2508static int tcpm_set_vbus(struct tcpm_port *port, bool enable)
2509{
2510 int ret;
2511
2512 if (enable && port->vbus_charge)
2513 return -EINVAL;
2514
2515 tcpm_log(port, "vbus:=%d charge=%d", enable, port->vbus_charge);
2516
2517 ret = port->tcpc->set_vbus(port->tcpc, enable, port->vbus_charge);
2518 if (ret < 0)
2519 return ret;
2520
2521 port->vbus_source = enable;
2522 return 0;
2523}
2524
2525static int tcpm_set_charge(struct tcpm_port *port, bool charge)
2526{
2527 int ret;
2528
2529 if (charge && port->vbus_source)
2530 return -EINVAL;
2531
2532 if (charge != port->vbus_charge) {
2533 tcpm_log(port, "vbus=%d charge:=%d", port->vbus_source, charge);
2534 ret = port->tcpc->set_vbus(port->tcpc, port->vbus_source,
2535 charge);
2536 if (ret < 0)
2537 return ret;
2538 }
2539 port->vbus_charge = charge;
2540 return 0;
2541}
2542
2543static bool tcpm_start_drp_toggling(struct tcpm_port *port,
2544 enum typec_cc_status cc)
2545{
2546 int ret;
2547
2548 if (port->tcpc->start_drp_toggling &&
2549 port->port_type == TYPEC_PORT_DRP) {
2550 tcpm_log_force(port, "Start DRP toggling");
2551 ret = port->tcpc->start_drp_toggling(port->tcpc, cc);
2552 if (!ret)
2553 return true;
2554 }
2555
2556 return false;
2557}
2558
2559static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc)
2560{
2561 tcpm_log(port, "cc:=%d", cc);
2562 port->cc_req = cc;
2563 port->tcpc->set_cc(port->tcpc, cc);
2564}
2565
2566static int tcpm_init_vbus(struct tcpm_port *port)
2567{
2568 int ret;
2569
2570 ret = port->tcpc->set_vbus(port->tcpc, false, false);
2571 port->vbus_source = false;
2572 port->vbus_charge = false;
2573 return ret;
2574}
2575
2576static int tcpm_init_vconn(struct tcpm_port *port)
2577{
2578 int ret;
2579
2580 ret = port->tcpc->set_vconn(port->tcpc, false);
2581 port->vconn_role = TYPEC_SINK;
2582 return ret;
2583}
2584
2585static void tcpm_typec_connect(struct tcpm_port *port)
2586{
2587 if (!port->connected) {
2588
2589 memset(&port->partner_ident, 0, sizeof(port->partner_ident));
2590 port->partner_desc.usb_pd = port->pd_capable;
2591 if (tcpm_port_is_debug(port))
2592 port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG;
2593 else if (tcpm_port_is_audio(port))
2594 port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO;
2595 else
2596 port->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
2597 port->partner = typec_register_partner(port->typec_port,
2598 &port->partner_desc);
2599 port->connected = true;
2600 }
2601}
2602
2603static int tcpm_src_attach(struct tcpm_port *port)
2604{
2605 enum typec_cc_polarity polarity =
2606 port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2
2607 : TYPEC_POLARITY_CC1;
2608 int ret;
2609
2610 if (port->attached)
2611 return 0;
2612
2613 ret = tcpm_set_polarity(port, polarity);
2614 if (ret < 0)
2615 return ret;
2616
2617 ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
2618 if (ret < 0)
2619 return ret;
2620
2621 ret = port->tcpc->set_pd_rx(port->tcpc, true);
2622 if (ret < 0)
2623 goto out_disable_mux;
2624
2625
2626
2627
2628
2629
2630 if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) ||
2631 (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) {
2632 ret = tcpm_set_vconn(port, true);
2633 if (ret < 0)
2634 goto out_disable_pd;
2635 }
2636
2637 ret = tcpm_set_vbus(port, true);
2638 if (ret < 0)
2639 goto out_disable_vconn;
2640
2641 port->pd_capable = false;
2642
2643 port->partner = NULL;
2644
2645 port->attached = true;
2646 port->send_discover = true;
2647
2648 return 0;
2649
2650out_disable_vconn:
2651 tcpm_set_vconn(port, false);
2652out_disable_pd:
2653 port->tcpc->set_pd_rx(port->tcpc, false);
2654out_disable_mux:
2655 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
2656 TYPEC_ORIENTATION_NONE);
2657 return ret;
2658}
2659
2660static void tcpm_typec_disconnect(struct tcpm_port *port)
2661{
2662 if (port->connected) {
2663 typec_unregister_partner(port->partner);
2664 port->partner = NULL;
2665 port->connected = false;
2666 }
2667}
2668
2669static void tcpm_unregister_altmodes(struct tcpm_port *port)
2670{
2671 struct pd_mode_data *modep = &port->mode_data;
2672 int i;
2673
2674 for (i = 0; i < modep->altmodes; i++) {
2675 typec_unregister_altmode(port->partner_altmode[i]);
2676 port->partner_altmode[i] = NULL;
2677 }
2678
2679 memset(modep, 0, sizeof(*modep));
2680}
2681
2682static void tcpm_reset_port(struct tcpm_port *port)
2683{
2684 tcpm_unregister_altmodes(port);
2685 tcpm_typec_disconnect(port);
2686 port->attached = false;
2687 port->pd_capable = false;
2688 port->pps_data.supported = false;
2689
2690
2691
2692
2693
2694 port->rx_msgid = -1;
2695
2696 port->tcpc->set_pd_rx(port->tcpc, false);
2697 tcpm_init_vbus(port);
2698 tcpm_init_vconn(port);
2699 tcpm_set_current_limit(port, 0, 0);
2700 tcpm_set_polarity(port, TYPEC_POLARITY_CC1);
2701 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
2702 TYPEC_ORIENTATION_NONE);
2703 tcpm_set_attached_state(port, false);
2704 port->try_src_count = 0;
2705 port->try_snk_count = 0;
2706 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
2707
2708 power_supply_changed(port->psy);
2709}
2710
2711static void tcpm_detach(struct tcpm_port *port)
2712{
2713 if (!port->attached)
2714 return;
2715
2716 if (tcpm_port_is_disconnected(port))
2717 port->hard_reset_count = 0;
2718
2719 tcpm_reset_port(port);
2720}
2721
2722static void tcpm_src_detach(struct tcpm_port *port)
2723{
2724 tcpm_detach(port);
2725}
2726
2727static int tcpm_snk_attach(struct tcpm_port *port)
2728{
2729 int ret;
2730
2731 if (port->attached)
2732 return 0;
2733
2734 ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ?
2735 TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1);
2736 if (ret < 0)
2737 return ret;
2738
2739 ret = tcpm_set_roles(port, true, TYPEC_SINK, TYPEC_DEVICE);
2740 if (ret < 0)
2741 return ret;
2742
2743 port->pd_capable = false;
2744
2745 port->partner = NULL;
2746
2747 port->attached = true;
2748 port->send_discover = true;
2749
2750 return 0;
2751}
2752
2753static void tcpm_snk_detach(struct tcpm_port *port)
2754{
2755 tcpm_detach(port);
2756}
2757
2758static int tcpm_acc_attach(struct tcpm_port *port)
2759{
2760 int ret;
2761
2762 if (port->attached)
2763 return 0;
2764
2765 ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
2766 if (ret < 0)
2767 return ret;
2768
2769 port->partner = NULL;
2770
2771 tcpm_typec_connect(port);
2772
2773 port->attached = true;
2774
2775 return 0;
2776}
2777
2778static void tcpm_acc_detach(struct tcpm_port *port)
2779{
2780 tcpm_detach(port);
2781}
2782
2783static inline enum tcpm_state hard_reset_state(struct tcpm_port *port)
2784{
2785 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)
2786 return HARD_RESET_SEND;
2787 if (port->pd_capable)
2788 return ERROR_RECOVERY;
2789 if (port->pwr_role == TYPEC_SOURCE)
2790 return SRC_UNATTACHED;
2791 if (port->state == SNK_WAIT_CAPABILITIES)
2792 return SNK_READY;
2793 return SNK_UNATTACHED;
2794}
2795
2796static inline enum tcpm_state unattached_state(struct tcpm_port *port)
2797{
2798 if (port->port_type == TYPEC_PORT_DRP) {
2799 if (port->pwr_role == TYPEC_SOURCE)
2800 return SRC_UNATTACHED;
2801 else
2802 return SNK_UNATTACHED;
2803 } else if (port->port_type == TYPEC_PORT_SRC) {
2804 return SRC_UNATTACHED;
2805 }
2806
2807 return SNK_UNATTACHED;
2808}
2809
2810static void tcpm_check_send_discover(struct tcpm_port *port)
2811{
2812 if (port->data_role == TYPEC_HOST && port->send_discover &&
2813 port->pd_capable) {
2814 tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0);
2815 port->send_discover = false;
2816 }
2817}
2818
2819static void tcpm_swap_complete(struct tcpm_port *port, int result)
2820{
2821 if (port->swap_pending) {
2822 port->swap_status = result;
2823 port->swap_pending = false;
2824 port->non_pd_role_swap = false;
2825 complete(&port->swap_complete);
2826 }
2827}
2828
2829static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc)
2830{
2831 switch (cc) {
2832 case TYPEC_CC_RP_1_5:
2833 return TYPEC_PWR_MODE_1_5A;
2834 case TYPEC_CC_RP_3_0:
2835 return TYPEC_PWR_MODE_3_0A;
2836 case TYPEC_CC_RP_DEF:
2837 default:
2838 return TYPEC_PWR_MODE_USB;
2839 }
2840}
2841
2842static void run_state_machine(struct tcpm_port *port)
2843{
2844 int ret;
2845 enum typec_pwr_opmode opmode;
2846 unsigned int msecs;
2847
2848 port->enter_state = port->state;
2849 switch (port->state) {
2850 case DRP_TOGGLING:
2851 break;
2852
2853 case SRC_UNATTACHED:
2854 if (!port->non_pd_role_swap)
2855 tcpm_swap_complete(port, -ENOTCONN);
2856 tcpm_src_detach(port);
2857 if (tcpm_start_drp_toggling(port, tcpm_rp_cc(port))) {
2858 tcpm_set_state(port, DRP_TOGGLING, 0);
2859 break;
2860 }
2861 tcpm_set_cc(port, tcpm_rp_cc(port));
2862 if (port->port_type == TYPEC_PORT_DRP)
2863 tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK);
2864 break;
2865 case SRC_ATTACH_WAIT:
2866 if (tcpm_port_is_debug(port))
2867 tcpm_set_state(port, DEBUG_ACC_ATTACHED,
2868 PD_T_CC_DEBOUNCE);
2869 else if (tcpm_port_is_audio(port))
2870 tcpm_set_state(port, AUDIO_ACC_ATTACHED,
2871 PD_T_CC_DEBOUNCE);
2872 else if (tcpm_port_is_source(port))
2873 tcpm_set_state(port,
2874 tcpm_try_snk(port) ? SNK_TRY
2875 : SRC_ATTACHED,
2876 PD_T_CC_DEBOUNCE);
2877 break;
2878
2879 case SNK_TRY:
2880 port->try_snk_count++;
2881
2882
2883
2884
2885
2886
2887
2888
2889 tcpm_set_cc(port, TYPEC_CC_RD);
2890 tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY);
2891 break;
2892 case SNK_TRY_WAIT:
2893 if (tcpm_port_is_sink(port)) {
2894 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0);
2895 } else {
2896 tcpm_set_state(port, SRC_TRYWAIT, 0);
2897 port->max_wait = 0;
2898 }
2899 break;
2900 case SNK_TRY_WAIT_DEBOUNCE:
2901 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS,
2902 PD_T_PD_DEBOUNCE);
2903 break;
2904 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
2905 if (port->vbus_present && tcpm_port_is_sink(port)) {
2906 tcpm_set_state(port, SNK_ATTACHED, 0);
2907 } else {
2908 tcpm_set_state(port, SRC_TRYWAIT, 0);
2909 port->max_wait = 0;
2910 }
2911 break;
2912 case SRC_TRYWAIT:
2913 tcpm_set_cc(port, tcpm_rp_cc(port));
2914 if (port->max_wait == 0) {
2915 port->max_wait = jiffies +
2916 msecs_to_jiffies(PD_T_DRP_TRY);
2917 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
2918 PD_T_DRP_TRY);
2919 } else {
2920 if (time_is_after_jiffies(port->max_wait))
2921 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
2922 jiffies_to_msecs(port->max_wait -
2923 jiffies));
2924 else
2925 tcpm_set_state(port, SNK_UNATTACHED, 0);
2926 }
2927 break;
2928 case SRC_TRYWAIT_DEBOUNCE:
2929 tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE);
2930 break;
2931 case SRC_TRYWAIT_UNATTACHED:
2932 tcpm_set_state(port, SNK_UNATTACHED, 0);
2933 break;
2934
2935 case SRC_ATTACHED:
2936 ret = tcpm_src_attach(port);
2937 tcpm_set_state(port, SRC_UNATTACHED,
2938 ret < 0 ? 0 : PD_T_PS_SOURCE_ON);
2939 break;
2940 case SRC_STARTUP:
2941 opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port));
2942 typec_set_pwr_opmode(port->typec_port, opmode);
2943 port->pwr_opmode = TYPEC_PWR_MODE_USB;
2944 port->caps_count = 0;
2945 port->negotiated_rev = PD_MAX_REV;
2946 port->message_id = 0;
2947 port->rx_msgid = -1;
2948 port->explicit_contract = false;
2949 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
2950 break;
2951 case SRC_SEND_CAPABILITIES:
2952 port->caps_count++;
2953 if (port->caps_count > PD_N_CAPS_COUNT) {
2954 tcpm_set_state(port, SRC_READY, 0);
2955 break;
2956 }
2957 ret = tcpm_pd_send_source_caps(port);
2958 if (ret < 0) {
2959 tcpm_set_state(port, SRC_SEND_CAPABILITIES,
2960 PD_T_SEND_SOURCE_CAP);
2961 } else {
2962
2963
2964
2965
2966
2967
2968 port->caps_count = 0;
2969 port->pd_capable = true;
2970 tcpm_set_state_cond(port, SRC_SEND_CAPABILITIES_TIMEOUT,
2971 PD_T_SEND_SOURCE_CAP);
2972 }
2973 break;
2974 case SRC_SEND_CAPABILITIES_TIMEOUT:
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) {
2989 tcpm_set_state(port, HARD_RESET_SEND, 0);
2990 } else if (port->negotiated_rev > PD_REV20) {
2991 port->negotiated_rev--;
2992 port->hard_reset_count = 0;
2993 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
2994 } else {
2995 tcpm_set_state(port, hard_reset_state(port), 0);
2996 }
2997 break;
2998 case SRC_NEGOTIATE_CAPABILITIES:
2999 ret = tcpm_pd_check_request(port);
3000 if (ret < 0) {
3001 tcpm_pd_send_control(port, PD_CTRL_REJECT);
3002 if (!port->explicit_contract) {
3003 tcpm_set_state(port,
3004 SRC_WAIT_NEW_CAPABILITIES, 0);
3005 } else {
3006 tcpm_set_state(port, SRC_READY, 0);
3007 }
3008 } else {
3009 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3010 tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
3011 PD_T_SRC_TRANSITION);
3012 }
3013 break;
3014 case SRC_TRANSITION_SUPPLY:
3015
3016 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
3017 port->explicit_contract = true;
3018 typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD);
3019 port->pwr_opmode = TYPEC_PWR_MODE_PD;
3020 tcpm_set_state_cond(port, SRC_READY, 0);
3021 break;
3022 case SRC_READY:
3023#if 1
3024 port->hard_reset_count = 0;
3025#endif
3026 port->try_src_count = 0;
3027
3028 tcpm_swap_complete(port, 0);
3029 tcpm_typec_connect(port);
3030
3031 tcpm_check_send_discover(port);
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045 break;
3046 case SRC_WAIT_NEW_CAPABILITIES:
3047
3048 break;
3049
3050
3051 case SNK_UNATTACHED:
3052 if (!port->non_pd_role_swap)
3053 tcpm_swap_complete(port, -ENOTCONN);
3054 tcpm_pps_complete(port, -ENOTCONN);
3055 tcpm_snk_detach(port);
3056 if (tcpm_start_drp_toggling(port, TYPEC_CC_RD)) {
3057 tcpm_set_state(port, DRP_TOGGLING, 0);
3058 break;
3059 }
3060 tcpm_set_cc(port, TYPEC_CC_RD);
3061 if (port->port_type == TYPEC_PORT_DRP)
3062 tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC);
3063 break;
3064 case SNK_ATTACH_WAIT:
3065 if ((port->cc1 == TYPEC_CC_OPEN &&
3066 port->cc2 != TYPEC_CC_OPEN) ||
3067 (port->cc1 != TYPEC_CC_OPEN &&
3068 port->cc2 == TYPEC_CC_OPEN))
3069 tcpm_set_state(port, SNK_DEBOUNCED,
3070 PD_T_CC_DEBOUNCE);
3071 else if (tcpm_port_is_disconnected(port))
3072 tcpm_set_state(port, SNK_UNATTACHED,
3073 PD_T_PD_DEBOUNCE);
3074 break;
3075 case SNK_DEBOUNCED:
3076 if (tcpm_port_is_disconnected(port))
3077 tcpm_set_state(port, SNK_UNATTACHED,
3078 PD_T_PD_DEBOUNCE);
3079 else if (port->vbus_present)
3080 tcpm_set_state(port,
3081 tcpm_try_src(port) ? SRC_TRY
3082 : SNK_ATTACHED,
3083 0);
3084 else
3085
3086 tcpm_set_state(port, PORT_RESET, PD_T_PS_SOURCE_ON);
3087 break;
3088
3089 case SRC_TRY:
3090 port->try_src_count++;
3091 tcpm_set_cc(port, tcpm_rp_cc(port));
3092 port->max_wait = 0;
3093 tcpm_set_state(port, SRC_TRY_WAIT, 0);
3094 break;
3095 case SRC_TRY_WAIT:
3096 if (port->max_wait == 0) {
3097 port->max_wait = jiffies +
3098 msecs_to_jiffies(PD_T_DRP_TRY);
3099 msecs = PD_T_DRP_TRY;
3100 } else {
3101 if (time_is_after_jiffies(port->max_wait))
3102 msecs = jiffies_to_msecs(port->max_wait -
3103 jiffies);
3104 else
3105 msecs = 0;
3106 }
3107 tcpm_set_state(port, SNK_TRYWAIT, msecs);
3108 break;
3109 case SRC_TRY_DEBOUNCE:
3110 tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE);
3111 break;
3112 case SNK_TRYWAIT:
3113 tcpm_set_cc(port, TYPEC_CC_RD);
3114 tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE);
3115 break;
3116 case SNK_TRYWAIT_VBUS:
3117
3118
3119
3120
3121
3122 if (port->vbus_present && tcpm_port_is_sink(port)) {
3123 tcpm_set_state(port, SNK_ATTACHED, 0);
3124 break;
3125 }
3126 if (!tcpm_port_is_sink(port))
3127 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
3128 break;
3129 case SNK_TRYWAIT_DEBOUNCE:
3130 tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE);
3131 break;
3132 case SNK_ATTACHED:
3133 ret = tcpm_snk_attach(port);
3134 if (ret < 0)
3135 tcpm_set_state(port, SNK_UNATTACHED, 0);
3136 else
3137 tcpm_set_state(port, SNK_STARTUP, 0);
3138 break;
3139 case SNK_STARTUP:
3140 opmode = tcpm_get_pwr_opmode(port->polarity ?
3141 port->cc2 : port->cc1);
3142 typec_set_pwr_opmode(port->typec_port, opmode);
3143 port->pwr_opmode = TYPEC_PWR_MODE_USB;
3144 port->negotiated_rev = PD_MAX_REV;
3145 port->message_id = 0;
3146 port->rx_msgid = -1;
3147 port->explicit_contract = false;
3148 tcpm_set_state(port, SNK_DISCOVERY, 0);
3149 break;
3150 case SNK_DISCOVERY:
3151 if (port->vbus_present) {
3152 tcpm_set_current_limit(port,
3153 tcpm_get_current_limit(port),
3154 5000);
3155 tcpm_set_charge(port, true);
3156 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3157 break;
3158 }
3159
3160
3161
3162
3163
3164 tcpm_set_state(port, hard_reset_state(port),
3165 port->port_type == TYPEC_PORT_DRP ?
3166 PD_T_DB_DETECT : PD_T_NO_RESPONSE);
3167 break;
3168 case SNK_DISCOVERY_DEBOUNCE:
3169 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE,
3170 PD_T_CC_DEBOUNCE);
3171 break;
3172 case SNK_DISCOVERY_DEBOUNCE_DONE:
3173 if (!tcpm_port_is_disconnected(port) &&
3174 tcpm_port_is_sink(port) &&
3175 time_is_after_jiffies(port->delayed_runtime)) {
3176 tcpm_set_state(port, SNK_DISCOVERY,
3177 jiffies_to_msecs(port->delayed_runtime -
3178 jiffies));
3179 break;
3180 }
3181 tcpm_set_state(port, unattached_state(port), 0);
3182 break;
3183 case SNK_WAIT_CAPABILITIES:
3184 ret = port->tcpc->set_pd_rx(port->tcpc, true);
3185 if (ret < 0) {
3186 tcpm_set_state(port, SNK_READY, 0);
3187 break;
3188 }
3189
3190
3191
3192
3193
3194
3195 if (port->vbus_never_low) {
3196 port->vbus_never_low = false;
3197 tcpm_set_state(port, SOFT_RESET_SEND,
3198 PD_T_SINK_WAIT_CAP);
3199 } else {
3200 tcpm_set_state(port, hard_reset_state(port),
3201 PD_T_SINK_WAIT_CAP);
3202 }
3203 break;
3204 case SNK_NEGOTIATE_CAPABILITIES:
3205 port->pd_capable = true;
3206 port->hard_reset_count = 0;
3207 ret = tcpm_pd_send_request(port);
3208 if (ret < 0) {
3209
3210 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3211 } else {
3212 tcpm_set_state_cond(port, hard_reset_state(port),
3213 PD_T_SENDER_RESPONSE);
3214 }
3215 break;
3216 case SNK_NEGOTIATE_PPS_CAPABILITIES:
3217 ret = tcpm_pd_send_pps_request(port);
3218 if (ret < 0) {
3219 port->pps_status = ret;
3220
3221
3222
3223
3224
3225 if (port->update_sink_caps)
3226 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
3227 else
3228 tcpm_set_state(port, SNK_READY, 0);
3229 } else {
3230 tcpm_set_state_cond(port, hard_reset_state(port),
3231 PD_T_SENDER_RESPONSE);
3232 }
3233 break;
3234 case SNK_TRANSITION_SINK:
3235 case SNK_TRANSITION_SINK_VBUS:
3236 tcpm_set_state(port, hard_reset_state(port),
3237 PD_T_PS_TRANSITION);
3238 break;
3239 case SNK_READY:
3240 port->try_snk_count = 0;
3241 port->update_sink_caps = false;
3242 if (port->explicit_contract) {
3243 typec_set_pwr_opmode(port->typec_port,
3244 TYPEC_PWR_MODE_PD);
3245 port->pwr_opmode = TYPEC_PWR_MODE_PD;
3246 }
3247
3248 tcpm_swap_complete(port, 0);
3249 tcpm_typec_connect(port);
3250 tcpm_check_send_discover(port);
3251 tcpm_pps_complete(port, port->pps_status);
3252
3253 power_supply_changed(port->psy);
3254
3255 break;
3256
3257
3258 case ACC_UNATTACHED:
3259 tcpm_acc_detach(port);
3260 tcpm_set_state(port, SRC_UNATTACHED, 0);
3261 break;
3262 case DEBUG_ACC_ATTACHED:
3263 case AUDIO_ACC_ATTACHED:
3264 ret = tcpm_acc_attach(port);
3265 if (ret < 0)
3266 tcpm_set_state(port, ACC_UNATTACHED, 0);
3267 break;
3268 case AUDIO_ACC_DEBOUNCE:
3269 tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE);
3270 break;
3271
3272
3273 case HARD_RESET_SEND:
3274 tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL);
3275 tcpm_set_state(port, HARD_RESET_START, 0);
3276 break;
3277 case HARD_RESET_START:
3278 port->hard_reset_count++;
3279 port->tcpc->set_pd_rx(port->tcpc, false);
3280 tcpm_unregister_altmodes(port);
3281 port->send_discover = true;
3282 if (port->pwr_role == TYPEC_SOURCE)
3283 tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF,
3284 PD_T_PS_HARD_RESET);
3285 else
3286 tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0);
3287 break;
3288 case SRC_HARD_RESET_VBUS_OFF:
3289 tcpm_set_vconn(port, true);
3290 tcpm_set_vbus(port, false);
3291 tcpm_set_roles(port, port->self_powered, TYPEC_SOURCE,
3292 TYPEC_HOST);
3293 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
3294 break;
3295 case SRC_HARD_RESET_VBUS_ON:
3296 tcpm_set_vbus(port, true);
3297 port->tcpc->set_pd_rx(port->tcpc, true);
3298 tcpm_set_attached_state(port, true);
3299 tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON);
3300 break;
3301 case SNK_HARD_RESET_SINK_OFF:
3302 memset(&port->pps_data, 0, sizeof(port->pps_data));
3303 tcpm_set_vconn(port, false);
3304 if (port->pd_capable)
3305 tcpm_set_charge(port, false);
3306 tcpm_set_roles(port, port->self_powered, TYPEC_SINK,
3307 TYPEC_DEVICE);
3308
3309
3310
3311
3312
3313 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V);
3314 break;
3315 case SNK_HARD_RESET_WAIT_VBUS:
3316
3317 tcpm_set_state(port, SNK_UNATTACHED,
3318 PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON);
3319 break;
3320 case SNK_HARD_RESET_SINK_ON:
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337 if (port->pd_capable) {
3338 tcpm_set_current_limit(port,
3339 tcpm_get_current_limit(port),
3340 5000);
3341 tcpm_set_charge(port, true);
3342 }
3343 tcpm_set_attached_state(port, true);
3344 tcpm_set_state(port, SNK_STARTUP, 0);
3345 break;
3346
3347
3348 case SOFT_RESET:
3349 port->message_id = 0;
3350 port->rx_msgid = -1;
3351 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3352 if (port->pwr_role == TYPEC_SOURCE)
3353 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
3354 else
3355 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3356 break;
3357 case SOFT_RESET_SEND:
3358 port->message_id = 0;
3359 port->rx_msgid = -1;
3360 if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET))
3361 tcpm_set_state_cond(port, hard_reset_state(port), 0);
3362 else
3363 tcpm_set_state_cond(port, hard_reset_state(port),
3364 PD_T_SENDER_RESPONSE);
3365 break;
3366
3367
3368 case DR_SWAP_SEND:
3369 tcpm_pd_send_control(port, PD_CTRL_DR_SWAP);
3370 tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT,
3371 PD_T_SENDER_RESPONSE);
3372 break;
3373 case DR_SWAP_ACCEPT:
3374 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3375 tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0);
3376 break;
3377 case DR_SWAP_SEND_TIMEOUT:
3378 tcpm_swap_complete(port, -ETIMEDOUT);
3379 tcpm_set_state(port, ready_state(port), 0);
3380 break;
3381 case DR_SWAP_CHANGE_DR:
3382 if (port->data_role == TYPEC_HOST) {
3383 tcpm_unregister_altmodes(port);
3384 tcpm_set_roles(port, true, port->pwr_role,
3385 TYPEC_DEVICE);
3386 } else {
3387 tcpm_set_roles(port, true, port->pwr_role,
3388 TYPEC_HOST);
3389 port->send_discover = true;
3390 }
3391 tcpm_set_state(port, ready_state(port), 0);
3392 break;
3393
3394
3395 case PR_SWAP_ACCEPT:
3396 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3397 tcpm_set_state(port, PR_SWAP_START, 0);
3398 break;
3399 case PR_SWAP_SEND:
3400 tcpm_pd_send_control(port, PD_CTRL_PR_SWAP);
3401 tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT,
3402 PD_T_SENDER_RESPONSE);
3403 break;
3404 case PR_SWAP_SEND_TIMEOUT:
3405 tcpm_swap_complete(port, -ETIMEDOUT);
3406 tcpm_set_state(port, ready_state(port), 0);
3407 break;
3408 case PR_SWAP_START:
3409 if (port->pwr_role == TYPEC_SOURCE)
3410 tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF,
3411 PD_T_SRC_TRANSITION);
3412 else
3413 tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0);
3414 break;
3415 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3416 tcpm_set_vbus(port, false);
3417 port->explicit_contract = false;
3418
3419 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF,
3420 PD_T_SRCSWAPSTDBY);
3421 break;
3422 case PR_SWAP_SRC_SNK_SOURCE_OFF:
3423 tcpm_set_cc(port, TYPEC_CC_RD);
3424
3425 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED,
3426 PD_T_CC_DEBOUNCE);
3427 break;
3428 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
3429
3430
3431
3432
3433
3434
3435
3436 tcpm_set_pwr_role(port, TYPEC_SINK);
3437 if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
3438 tcpm_set_state(port, ERROR_RECOVERY, 0);
3439 break;
3440 }
3441 tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON);
3442 break;
3443 case PR_SWAP_SRC_SNK_SINK_ON:
3444 tcpm_set_state(port, SNK_STARTUP, 0);
3445 break;
3446 case PR_SWAP_SNK_SRC_SINK_OFF:
3447 tcpm_set_charge(port, false);
3448 tcpm_set_state(port, hard_reset_state(port),
3449 PD_T_PS_SOURCE_OFF);
3450 break;
3451 case PR_SWAP_SNK_SRC_SOURCE_ON:
3452 tcpm_set_cc(port, tcpm_rp_cc(port));
3453 tcpm_set_vbus(port, true);
3454
3455
3456
3457
3458
3459 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP,
3460 PD_T_NEWSRC);
3461 break;
3462 case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP:
3463
3464
3465
3466
3467
3468
3469
3470 tcpm_set_pwr_role(port, TYPEC_SOURCE);
3471 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
3472 tcpm_set_state(port, SRC_STARTUP, 0);
3473 break;
3474
3475 case VCONN_SWAP_ACCEPT:
3476 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3477 tcpm_set_state(port, VCONN_SWAP_START, 0);
3478 break;
3479 case VCONN_SWAP_SEND:
3480 tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP);
3481 tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT,
3482 PD_T_SENDER_RESPONSE);
3483 break;
3484 case VCONN_SWAP_SEND_TIMEOUT:
3485 tcpm_swap_complete(port, -ETIMEDOUT);
3486 tcpm_set_state(port, ready_state(port), 0);
3487 break;
3488 case VCONN_SWAP_START:
3489 if (port->vconn_role == TYPEC_SOURCE)
3490 tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0);
3491 else
3492 tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0);
3493 break;
3494 case VCONN_SWAP_WAIT_FOR_VCONN:
3495 tcpm_set_state(port, hard_reset_state(port),
3496 PD_T_VCONN_SOURCE_ON);
3497 break;
3498 case VCONN_SWAP_TURN_ON_VCONN:
3499 tcpm_set_vconn(port, true);
3500 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
3501 tcpm_set_state(port, ready_state(port), 0);
3502 break;
3503 case VCONN_SWAP_TURN_OFF_VCONN:
3504 tcpm_set_vconn(port, false);
3505 tcpm_set_state(port, ready_state(port), 0);
3506 break;
3507
3508 case DR_SWAP_CANCEL:
3509 case PR_SWAP_CANCEL:
3510 case VCONN_SWAP_CANCEL:
3511 tcpm_swap_complete(port, port->swap_status);
3512 if (port->pwr_role == TYPEC_SOURCE)
3513 tcpm_set_state(port, SRC_READY, 0);
3514 else
3515 tcpm_set_state(port, SNK_READY, 0);
3516 break;
3517
3518 case BIST_RX:
3519 switch (BDO_MODE_MASK(port->bist_request)) {
3520 case BDO_MODE_CARRIER2:
3521 tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
3522 break;
3523 default:
3524 break;
3525 }
3526
3527 tcpm_set_state(port, unattached_state(port), 0);
3528 break;
3529 case GET_STATUS_SEND:
3530 tcpm_pd_send_control(port, PD_CTRL_GET_STATUS);
3531 tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT,
3532 PD_T_SENDER_RESPONSE);
3533 break;
3534 case GET_STATUS_SEND_TIMEOUT:
3535 tcpm_set_state(port, ready_state(port), 0);
3536 break;
3537 case GET_PPS_STATUS_SEND:
3538 tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS);
3539 tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT,
3540 PD_T_SENDER_RESPONSE);
3541 break;
3542 case GET_PPS_STATUS_SEND_TIMEOUT:
3543 tcpm_set_state(port, ready_state(port), 0);
3544 break;
3545 case ERROR_RECOVERY:
3546 tcpm_swap_complete(port, -EPROTO);
3547 tcpm_pps_complete(port, -EPROTO);
3548 tcpm_set_state(port, PORT_RESET, 0);
3549 break;
3550 case PORT_RESET:
3551 tcpm_reset_port(port);
3552 tcpm_set_cc(port, TYPEC_CC_OPEN);
3553 tcpm_set_state(port, PORT_RESET_WAIT_OFF,
3554 PD_T_ERROR_RECOVERY);
3555 break;
3556 case PORT_RESET_WAIT_OFF:
3557 tcpm_set_state(port,
3558 tcpm_default_state(port),
3559 port->vbus_present ? PD_T_PS_SOURCE_OFF : 0);
3560 break;
3561 default:
3562 WARN(1, "Unexpected port state %d\n", port->state);
3563 break;
3564 }
3565}
3566
3567static void tcpm_state_machine_work(struct work_struct *work)
3568{
3569 struct tcpm_port *port = container_of(work, struct tcpm_port,
3570 state_machine.work);
3571 enum tcpm_state prev_state;
3572
3573 mutex_lock(&port->lock);
3574 port->state_machine_running = true;
3575
3576 if (port->queued_message && tcpm_send_queued_message(port))
3577 goto done;
3578
3579
3580 if (port->delayed_state) {
3581 tcpm_log(port, "state change %s -> %s [delayed %ld ms]",
3582 tcpm_states[port->state],
3583 tcpm_states[port->delayed_state], port->delay_ms);
3584 port->prev_state = port->state;
3585 port->state = port->delayed_state;
3586 port->delayed_state = INVALID_STATE;
3587 }
3588
3589
3590
3591
3592
3593 do {
3594 prev_state = port->state;
3595 run_state_machine(port);
3596 if (port->queued_message)
3597 tcpm_send_queued_message(port);
3598 } while (port->state != prev_state && !port->delayed_state);
3599
3600done:
3601 port->state_machine_running = false;
3602 mutex_unlock(&port->lock);
3603}
3604
3605static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
3606 enum typec_cc_status cc2)
3607{
3608 enum typec_cc_status old_cc1, old_cc2;
3609 enum tcpm_state new_state;
3610
3611 old_cc1 = port->cc1;
3612 old_cc2 = port->cc2;
3613 port->cc1 = cc1;
3614 port->cc2 = cc2;
3615
3616 tcpm_log_force(port,
3617 "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]",
3618 old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state],
3619 port->polarity,
3620 tcpm_port_is_disconnected(port) ? "disconnected"
3621 : "connected");
3622
3623 switch (port->state) {
3624 case DRP_TOGGLING:
3625 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
3626 tcpm_port_is_source(port))
3627 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3628 else if (tcpm_port_is_sink(port))
3629 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3630 break;
3631 case SRC_UNATTACHED:
3632 case ACC_UNATTACHED:
3633 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
3634 tcpm_port_is_source(port))
3635 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3636 break;
3637 case SRC_ATTACH_WAIT:
3638 if (tcpm_port_is_disconnected(port) ||
3639 tcpm_port_is_audio_detached(port))
3640 tcpm_set_state(port, SRC_UNATTACHED, 0);
3641 else if (cc1 != old_cc1 || cc2 != old_cc2)
3642 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3643 break;
3644 case SRC_ATTACHED:
3645 case SRC_SEND_CAPABILITIES:
3646 case SRC_READY:
3647 if (tcpm_port_is_disconnected(port) ||
3648 !tcpm_port_is_source(port))
3649 tcpm_set_state(port, SRC_UNATTACHED, 0);
3650 break;
3651 case SNK_UNATTACHED:
3652 if (tcpm_port_is_sink(port))
3653 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3654 break;
3655 case SNK_ATTACH_WAIT:
3656 if ((port->cc1 == TYPEC_CC_OPEN &&
3657 port->cc2 != TYPEC_CC_OPEN) ||
3658 (port->cc1 != TYPEC_CC_OPEN &&
3659 port->cc2 == TYPEC_CC_OPEN))
3660 new_state = SNK_DEBOUNCED;
3661 else if (tcpm_port_is_disconnected(port))
3662 new_state = SNK_UNATTACHED;
3663 else
3664 break;
3665 if (new_state != port->delayed_state)
3666 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3667 break;
3668 case SNK_DEBOUNCED:
3669 if (tcpm_port_is_disconnected(port))
3670 new_state = SNK_UNATTACHED;
3671 else if (port->vbus_present)
3672 new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED;
3673 else
3674 new_state = SNK_UNATTACHED;
3675 if (new_state != port->delayed_state)
3676 tcpm_set_state(port, SNK_DEBOUNCED, 0);
3677 break;
3678 case SNK_READY:
3679 if (tcpm_port_is_disconnected(port))
3680 tcpm_set_state(port, unattached_state(port), 0);
3681 else if (!port->pd_capable &&
3682 (cc1 != old_cc1 || cc2 != old_cc2))
3683 tcpm_set_current_limit(port,
3684 tcpm_get_current_limit(port),
3685 5000);
3686 break;
3687
3688 case AUDIO_ACC_ATTACHED:
3689 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
3690 tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0);
3691 break;
3692 case AUDIO_ACC_DEBOUNCE:
3693 if (tcpm_port_is_audio(port))
3694 tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0);
3695 break;
3696
3697 case DEBUG_ACC_ATTACHED:
3698 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
3699 tcpm_set_state(port, ACC_UNATTACHED, 0);
3700 break;
3701
3702 case SNK_TRY:
3703
3704 break;
3705
3706 case SNK_DISCOVERY:
3707
3708 if (tcpm_port_is_disconnected(port))
3709 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0);
3710 break;
3711 case SNK_DISCOVERY_DEBOUNCE:
3712 break;
3713
3714 case SRC_TRYWAIT:
3715
3716 if (!port->vbus_present && tcpm_port_is_source(port))
3717 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
3718 break;
3719 case SRC_TRYWAIT_DEBOUNCE:
3720 if (port->vbus_present || !tcpm_port_is_source(port))
3721 tcpm_set_state(port, SRC_TRYWAIT, 0);
3722 break;
3723 case SNK_TRY_WAIT_DEBOUNCE:
3724 if (!tcpm_port_is_sink(port)) {
3725 port->max_wait = 0;
3726 tcpm_set_state(port, SRC_TRYWAIT, 0);
3727 }
3728 break;
3729 case SRC_TRY_WAIT:
3730 if (tcpm_port_is_source(port))
3731 tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0);
3732 break;
3733 case SRC_TRY_DEBOUNCE:
3734 tcpm_set_state(port, SRC_TRY_WAIT, 0);
3735 break;
3736 case SNK_TRYWAIT_DEBOUNCE:
3737 if (tcpm_port_is_sink(port))
3738 tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0);
3739 break;
3740 case SNK_TRYWAIT_VBUS:
3741 if (!tcpm_port_is_sink(port))
3742 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
3743 break;
3744 case SNK_TRYWAIT:
3745
3746 break;
3747 case PR_SWAP_SNK_SRC_SINK_OFF:
3748 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3749 case PR_SWAP_SRC_SNK_SOURCE_OFF:
3750 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
3751 case PR_SWAP_SNK_SRC_SOURCE_ON:
3752
3753
3754
3755
3756 break;
3757
3758 default:
3759 if (tcpm_port_is_disconnected(port))
3760 tcpm_set_state(port, unattached_state(port), 0);
3761 break;
3762 }
3763}
3764
3765static void _tcpm_pd_vbus_on(struct tcpm_port *port)
3766{
3767 tcpm_log_force(port, "VBUS on");
3768 port->vbus_present = true;
3769 switch (port->state) {
3770 case SNK_TRANSITION_SINK_VBUS:
3771 port->explicit_contract = true;
3772 tcpm_set_state(port, SNK_READY, 0);
3773 break;
3774 case SNK_DISCOVERY:
3775 tcpm_set_state(port, SNK_DISCOVERY, 0);
3776 break;
3777
3778 case SNK_DEBOUNCED:
3779 tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY
3780 : SNK_ATTACHED,
3781 0);
3782 break;
3783 case SNK_HARD_RESET_WAIT_VBUS:
3784 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0);
3785 break;
3786 case SRC_ATTACHED:
3787 tcpm_set_state(port, SRC_STARTUP, 0);
3788 break;
3789 case SRC_HARD_RESET_VBUS_ON:
3790 tcpm_set_state(port, SRC_STARTUP, 0);
3791 break;
3792
3793 case SNK_TRY:
3794
3795 break;
3796 case SRC_TRYWAIT:
3797
3798 break;
3799 case SRC_TRYWAIT_DEBOUNCE:
3800 tcpm_set_state(port, SRC_TRYWAIT, 0);
3801 break;
3802 case SNK_TRY_WAIT_DEBOUNCE:
3803
3804 break;
3805 case SNK_TRYWAIT:
3806
3807 break;
3808 case SNK_TRYWAIT_VBUS:
3809 if (tcpm_port_is_sink(port))
3810 tcpm_set_state(port, SNK_ATTACHED, 0);
3811 break;
3812 case SNK_TRYWAIT_DEBOUNCE:
3813
3814 break;
3815 case SRC_TRY_WAIT:
3816 case SRC_TRY_DEBOUNCE:
3817
3818 break;
3819 default:
3820 break;
3821 }
3822}
3823
3824static void _tcpm_pd_vbus_off(struct tcpm_port *port)
3825{
3826 tcpm_log_force(port, "VBUS off");
3827 port->vbus_present = false;
3828 port->vbus_never_low = false;
3829 switch (port->state) {
3830 case SNK_HARD_RESET_SINK_OFF:
3831 tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0);
3832 break;
3833 case SRC_HARD_RESET_VBUS_OFF:
3834 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, 0);
3835 break;
3836 case HARD_RESET_SEND:
3837 break;
3838
3839 case SNK_TRY:
3840
3841 break;
3842 case SRC_TRYWAIT:
3843
3844 if (tcpm_port_is_source(port))
3845 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
3846 break;
3847 case SNK_TRY_WAIT_DEBOUNCE:
3848
3849 break;
3850 case SNK_TRYWAIT:
3851 case SNK_TRYWAIT_VBUS:
3852 case SNK_TRYWAIT_DEBOUNCE:
3853 break;
3854 case SNK_ATTACH_WAIT:
3855 tcpm_set_state(port, SNK_UNATTACHED, 0);
3856 break;
3857
3858 case SNK_NEGOTIATE_CAPABILITIES:
3859 break;
3860
3861 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3862 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0);
3863 break;
3864
3865 case PR_SWAP_SNK_SRC_SINK_OFF:
3866
3867 break;
3868
3869 case PORT_RESET_WAIT_OFF:
3870 tcpm_set_state(port, tcpm_default_state(port), 0);
3871 break;
3872 case SRC_TRY_WAIT:
3873 case SRC_TRY_DEBOUNCE:
3874
3875 break;
3876 default:
3877 if (port->pwr_role == TYPEC_SINK &&
3878 port->attached)
3879 tcpm_set_state(port, SNK_UNATTACHED, 0);
3880 break;
3881 }
3882}
3883
3884static void _tcpm_pd_hard_reset(struct tcpm_port *port)
3885{
3886 tcpm_log_force(port, "Received hard reset");
3887
3888
3889
3890
3891 tcpm_set_state(port,
3892 port->hard_reset_count < PD_N_HARD_RESET_COUNT ?
3893 HARD_RESET_START : ERROR_RECOVERY,
3894 0);
3895}
3896
3897static void tcpm_pd_event_handler(struct work_struct *work)
3898{
3899 struct tcpm_port *port = container_of(work, struct tcpm_port,
3900 event_work);
3901 u32 events;
3902
3903 mutex_lock(&port->lock);
3904
3905 spin_lock(&port->pd_event_lock);
3906 while (port->pd_events) {
3907 events = port->pd_events;
3908 port->pd_events = 0;
3909 spin_unlock(&port->pd_event_lock);
3910 if (events & TCPM_RESET_EVENT)
3911 _tcpm_pd_hard_reset(port);
3912 if (events & TCPM_VBUS_EVENT) {
3913 bool vbus;
3914
3915 vbus = port->tcpc->get_vbus(port->tcpc);
3916 if (vbus)
3917 _tcpm_pd_vbus_on(port);
3918 else
3919 _tcpm_pd_vbus_off(port);
3920 }
3921 if (events & TCPM_CC_EVENT) {
3922 enum typec_cc_status cc1, cc2;
3923
3924 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
3925 _tcpm_cc_change(port, cc1, cc2);
3926 }
3927 spin_lock(&port->pd_event_lock);
3928 }
3929 spin_unlock(&port->pd_event_lock);
3930 mutex_unlock(&port->lock);
3931}
3932
3933void tcpm_cc_change(struct tcpm_port *port)
3934{
3935 spin_lock(&port->pd_event_lock);
3936 port->pd_events |= TCPM_CC_EVENT;
3937 spin_unlock(&port->pd_event_lock);
3938 queue_work(port->wq, &port->event_work);
3939}
3940EXPORT_SYMBOL_GPL(tcpm_cc_change);
3941
3942void tcpm_vbus_change(struct tcpm_port *port)
3943{
3944 spin_lock(&port->pd_event_lock);
3945 port->pd_events |= TCPM_VBUS_EVENT;
3946 spin_unlock(&port->pd_event_lock);
3947 queue_work(port->wq, &port->event_work);
3948}
3949EXPORT_SYMBOL_GPL(tcpm_vbus_change);
3950
3951void tcpm_pd_hard_reset(struct tcpm_port *port)
3952{
3953 spin_lock(&port->pd_event_lock);
3954 port->pd_events = TCPM_RESET_EVENT;
3955 spin_unlock(&port->pd_event_lock);
3956 queue_work(port->wq, &port->event_work);
3957}
3958EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
3959
3960static int tcpm_dr_set(const struct typec_capability *cap,
3961 enum typec_data_role data)
3962{
3963 struct tcpm_port *port = typec_cap_to_tcpm(cap);
3964 int ret;
3965
3966 mutex_lock(&port->swap_lock);
3967 mutex_lock(&port->lock);
3968
3969 if (port->port_type != TYPEC_PORT_DRP) {
3970 ret = -EINVAL;
3971 goto port_unlock;
3972 }
3973 if (port->state != SRC_READY && port->state != SNK_READY) {
3974 ret = -EAGAIN;
3975 goto port_unlock;
3976 }
3977
3978 if (port->data_role == data) {
3979 ret = 0;
3980 goto port_unlock;
3981 }
3982
3983
3984
3985
3986
3987
3988
3989
3990 if (!port->pd_capable) {
3991
3992
3993
3994
3995
3996 if (port->try_role == TYPEC_NO_PREFERRED_ROLE ||
3997 port->try_role == port->pwr_role) {
3998 ret = -EINVAL;
3999 goto port_unlock;
4000 }
4001 port->non_pd_role_swap = true;
4002 tcpm_set_state(port, PORT_RESET, 0);
4003 } else {
4004 tcpm_set_state(port, DR_SWAP_SEND, 0);
4005 }
4006
4007 port->swap_status = 0;
4008 port->swap_pending = true;
4009 reinit_completion(&port->swap_complete);
4010 mutex_unlock(&port->lock);
4011
4012 if (!wait_for_completion_timeout(&port->swap_complete,
4013 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4014 ret = -ETIMEDOUT;
4015 else
4016 ret = port->swap_status;
4017
4018 port->non_pd_role_swap = false;
4019 goto swap_unlock;
4020
4021port_unlock:
4022 mutex_unlock(&port->lock);
4023swap_unlock:
4024 mutex_unlock(&port->swap_lock);
4025 return ret;
4026}
4027
4028static int tcpm_pr_set(const struct typec_capability *cap,
4029 enum typec_role role)
4030{
4031 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4032 int ret;
4033
4034 mutex_lock(&port->swap_lock);
4035 mutex_lock(&port->lock);
4036
4037 if (port->port_type != TYPEC_PORT_DRP) {
4038 ret = -EINVAL;
4039 goto port_unlock;
4040 }
4041 if (port->state != SRC_READY && port->state != SNK_READY) {
4042 ret = -EAGAIN;
4043 goto port_unlock;
4044 }
4045
4046 if (role == port->pwr_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, PR_SWAP_SEND, 0);
4055 mutex_unlock(&port->lock);
4056
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;
4062
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_vconn_set(const struct typec_capability *cap,
4073 enum typec_role role)
4074{
4075 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4076 int ret;
4077
4078 mutex_lock(&port->swap_lock);
4079 mutex_lock(&port->lock);
4080
4081 if (port->state != SRC_READY && port->state != SNK_READY) {
4082 ret = -EAGAIN;
4083 goto port_unlock;
4084 }
4085
4086 if (role == port->vconn_role) {
4087 ret = 0;
4088 goto port_unlock;
4089 }
4090
4091 port->swap_status = 0;
4092 port->swap_pending = true;
4093 reinit_completion(&port->swap_complete);
4094 tcpm_set_state(port, VCONN_SWAP_SEND, 0);
4095 mutex_unlock(&port->lock);
4096
4097 if (!wait_for_completion_timeout(&port->swap_complete,
4098 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4099 ret = -ETIMEDOUT;
4100 else
4101 ret = port->swap_status;
4102
4103 goto swap_unlock;
4104
4105port_unlock:
4106 mutex_unlock(&port->lock);
4107swap_unlock:
4108 mutex_unlock(&port->swap_lock);
4109 return ret;
4110}
4111
4112static int tcpm_try_role(const struct typec_capability *cap, int role)
4113{
4114 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4115 struct tcpc_dev *tcpc = port->tcpc;
4116 int ret = 0;
4117
4118 mutex_lock(&port->lock);
4119 if (tcpc->try_role)
4120 ret = tcpc->try_role(tcpc, role);
4121 if (!ret && !tcpc->config->try_role_hw)
4122 port->try_role = role;
4123 port->try_src_count = 0;
4124 port->try_snk_count = 0;
4125 mutex_unlock(&port->lock);
4126
4127 return ret;
4128}
4129
4130static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr)
4131{
4132 unsigned int target_mw;
4133 int ret;
4134
4135 mutex_lock(&port->swap_lock);
4136 mutex_lock(&port->lock);
4137
4138 if (!port->pps_data.active) {
4139 ret = -EOPNOTSUPP;
4140 goto port_unlock;
4141 }
4142
4143 if (port->state != SNK_READY) {
4144 ret = -EAGAIN;
4145 goto port_unlock;
4146 }
4147
4148 if (op_curr > port->pps_data.max_curr) {
4149 ret = -EINVAL;
4150 goto port_unlock;
4151 }
4152
4153 target_mw = (op_curr * port->pps_data.out_volt) / 1000;
4154 if (target_mw < port->operating_snk_mw) {
4155 ret = -EINVAL;
4156 goto port_unlock;
4157 }
4158
4159
4160 op_curr = op_curr - (op_curr % RDO_PROG_CURR_MA_STEP);
4161
4162 reinit_completion(&port->pps_complete);
4163 port->pps_data.op_curr = op_curr;
4164 port->pps_status = 0;
4165 port->pps_pending = true;
4166 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4167 mutex_unlock(&port->lock);
4168
4169 if (!wait_for_completion_timeout(&port->pps_complete,
4170 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4171 ret = -ETIMEDOUT;
4172 else
4173 ret = port->pps_status;
4174
4175 goto swap_unlock;
4176
4177port_unlock:
4178 mutex_unlock(&port->lock);
4179swap_unlock:
4180 mutex_unlock(&port->swap_lock);
4181
4182 return ret;
4183}
4184
4185static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt)
4186{
4187 unsigned int target_mw;
4188 int ret;
4189
4190 mutex_lock(&port->swap_lock);
4191 mutex_lock(&port->lock);
4192
4193 if (!port->pps_data.active) {
4194 ret = -EOPNOTSUPP;
4195 goto port_unlock;
4196 }
4197
4198 if (port->state != SNK_READY) {
4199 ret = -EAGAIN;
4200 goto port_unlock;
4201 }
4202
4203 if (out_volt < port->pps_data.min_volt ||
4204 out_volt > port->pps_data.max_volt) {
4205 ret = -EINVAL;
4206 goto port_unlock;
4207 }
4208
4209 target_mw = (port->pps_data.op_curr * out_volt) / 1000;
4210 if (target_mw < port->operating_snk_mw) {
4211 ret = -EINVAL;
4212 goto port_unlock;
4213 }
4214
4215
4216 out_volt = out_volt - (out_volt % RDO_PROG_VOLT_MV_STEP);
4217
4218 reinit_completion(&port->pps_complete);
4219 port->pps_data.out_volt = out_volt;
4220 port->pps_status = 0;
4221 port->pps_pending = true;
4222 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4223 mutex_unlock(&port->lock);
4224
4225 if (!wait_for_completion_timeout(&port->pps_complete,
4226 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4227 ret = -ETIMEDOUT;
4228 else
4229 ret = port->pps_status;
4230
4231 goto swap_unlock;
4232
4233port_unlock:
4234 mutex_unlock(&port->lock);
4235swap_unlock:
4236 mutex_unlock(&port->swap_lock);
4237
4238 return ret;
4239}
4240
4241static int tcpm_pps_activate(struct tcpm_port *port, bool activate)
4242{
4243 int ret = 0;
4244
4245 mutex_lock(&port->swap_lock);
4246 mutex_lock(&port->lock);
4247
4248 if (!port->pps_data.supported) {
4249 ret = -EOPNOTSUPP;
4250 goto port_unlock;
4251 }
4252
4253
4254 if (!port->pps_data.active && !activate)
4255 goto port_unlock;
4256
4257 if (port->state != SNK_READY) {
4258 ret = -EAGAIN;
4259 goto port_unlock;
4260 }
4261
4262 reinit_completion(&port->pps_complete);
4263 port->pps_status = 0;
4264 port->pps_pending = true;
4265
4266
4267 if (activate) {
4268 port->pps_data.out_volt = port->supply_voltage;
4269 port->pps_data.op_curr = port->current_limit;
4270 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4271 } else {
4272 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
4273 }
4274 mutex_unlock(&port->lock);
4275
4276 if (!wait_for_completion_timeout(&port->pps_complete,
4277 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4278 ret = -ETIMEDOUT;
4279 else
4280 ret = port->pps_status;
4281
4282 goto swap_unlock;
4283
4284port_unlock:
4285 mutex_unlock(&port->lock);
4286swap_unlock:
4287 mutex_unlock(&port->swap_lock);
4288
4289 return ret;
4290}
4291
4292static void tcpm_init(struct tcpm_port *port)
4293{
4294 enum typec_cc_status cc1, cc2;
4295
4296 port->tcpc->init(port->tcpc);
4297
4298 tcpm_reset_port(port);
4299
4300
4301
4302
4303
4304
4305 port->vbus_present = port->tcpc->get_vbus(port->tcpc);
4306 if (port->vbus_present)
4307 port->vbus_never_low = true;
4308
4309 tcpm_set_state(port, tcpm_default_state(port), 0);
4310
4311 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
4312 _tcpm_cc_change(port, cc1, cc2);
4313
4314
4315
4316
4317
4318 tcpm_set_state(port, PORT_RESET, 0);
4319}
4320
4321static int tcpm_port_type_set(const struct typec_capability *cap,
4322 enum typec_port_type type)
4323{
4324 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4325
4326 mutex_lock(&port->lock);
4327 if (type == port->port_type)
4328 goto port_unlock;
4329
4330 port->port_type = type;
4331
4332 if (!port->connected) {
4333 tcpm_set_state(port, PORT_RESET, 0);
4334 } else if (type == TYPEC_PORT_SNK) {
4335 if (!(port->pwr_role == TYPEC_SINK &&
4336 port->data_role == TYPEC_DEVICE))
4337 tcpm_set_state(port, PORT_RESET, 0);
4338 } else if (type == TYPEC_PORT_SRC) {
4339 if (!(port->pwr_role == TYPEC_SOURCE &&
4340 port->data_role == TYPEC_HOST))
4341 tcpm_set_state(port, PORT_RESET, 0);
4342 }
4343
4344port_unlock:
4345 mutex_unlock(&port->lock);
4346 return 0;
4347}
4348
4349void tcpm_tcpc_reset(struct tcpm_port *port)
4350{
4351 mutex_lock(&port->lock);
4352
4353 tcpm_init(port);
4354 mutex_unlock(&port->lock);
4355}
4356EXPORT_SYMBOL_GPL(tcpm_tcpc_reset);
4357
4358static int tcpm_copy_pdos(u32 *dest_pdo, const u32 *src_pdo,
4359 unsigned int nr_pdo)
4360{
4361 unsigned int i;
4362
4363 if (nr_pdo > PDO_MAX_OBJECTS)
4364 nr_pdo = PDO_MAX_OBJECTS;
4365
4366 for (i = 0; i < nr_pdo; i++)
4367 dest_pdo[i] = src_pdo[i];
4368
4369 return nr_pdo;
4370}
4371
4372static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo,
4373 unsigned int nr_vdo)
4374{
4375 unsigned int i;
4376
4377 if (nr_vdo > VDO_MAX_OBJECTS)
4378 nr_vdo = VDO_MAX_OBJECTS;
4379
4380 for (i = 0; i < nr_vdo; i++)
4381 dest_vdo[i] = src_vdo[i];
4382
4383 return nr_vdo;
4384}
4385
4386static int tcpm_fw_get_caps(struct tcpm_port *port,
4387 struct fwnode_handle *fwnode)
4388{
4389 const char *cap_str;
4390 int ret;
4391 u32 mw;
4392
4393 if (!fwnode)
4394 return -EINVAL;
4395
4396
4397 ret = fwnode_property_read_string(fwnode, "data-role", &cap_str);
4398 if (ret == 0) {
4399 port->typec_caps.data = typec_find_port_data_role(cap_str);
4400 if (port->typec_caps.data < 0)
4401 return -EINVAL;
4402 }
4403
4404 ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
4405 if (ret < 0)
4406 return ret;
4407
4408 port->typec_caps.type = typec_find_port_power_role(cap_str);
4409 if (port->typec_caps.type < 0)
4410 return -EINVAL;
4411 port->port_type = port->typec_caps.type;
4412
4413 if (port->port_type == TYPEC_PORT_SNK)
4414 goto sink;
4415
4416
4417 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
4418 NULL, 0);
4419 if (ret <= 0)
4420 return -EINVAL;
4421
4422 port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
4423 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
4424 port->src_pdo, port->nr_src_pdo);
4425 if ((ret < 0) || tcpm_validate_caps(port, port->src_pdo,
4426 port->nr_src_pdo))
4427 return -EINVAL;
4428
4429 if (port->port_type == TYPEC_PORT_SRC)
4430 return 0;
4431
4432
4433 ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str);
4434 if (ret < 0)
4435 return ret;
4436
4437 port->typec_caps.prefer_role = typec_find_power_role(cap_str);
4438 if (port->typec_caps.prefer_role < 0)
4439 return -EINVAL;
4440sink:
4441
4442 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
4443 NULL, 0);
4444 if (ret <= 0)
4445 return -EINVAL;
4446
4447 port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS);
4448 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
4449 port->snk_pdo, port->nr_snk_pdo);
4450 if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo,
4451 port->nr_snk_pdo))
4452 return -EINVAL;
4453
4454 if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0)
4455 return -EINVAL;
4456 port->operating_snk_mw = mw / 1000;
4457
4458 port->self_powered = fwnode_property_read_bool(fwnode, "self-powered");
4459
4460 return 0;
4461}
4462
4463
4464enum tcpm_psy_online_states {
4465 TCPM_PSY_OFFLINE = 0,
4466 TCPM_PSY_FIXED_ONLINE,
4467 TCPM_PSY_PROG_ONLINE,
4468};
4469
4470static enum power_supply_property tcpm_psy_props[] = {
4471 POWER_SUPPLY_PROP_USB_TYPE,
4472 POWER_SUPPLY_PROP_ONLINE,
4473 POWER_SUPPLY_PROP_VOLTAGE_MIN,
4474 POWER_SUPPLY_PROP_VOLTAGE_MAX,
4475 POWER_SUPPLY_PROP_VOLTAGE_NOW,
4476 POWER_SUPPLY_PROP_CURRENT_MAX,
4477 POWER_SUPPLY_PROP_CURRENT_NOW,
4478};
4479
4480static int tcpm_psy_get_online(struct tcpm_port *port,
4481 union power_supply_propval *val)
4482{
4483 if (port->vbus_charge) {
4484 if (port->pps_data.active)
4485 val->intval = TCPM_PSY_PROG_ONLINE;
4486 else
4487 val->intval = TCPM_PSY_FIXED_ONLINE;
4488 } else {
4489 val->intval = TCPM_PSY_OFFLINE;
4490 }
4491
4492 return 0;
4493}
4494
4495static int tcpm_psy_get_voltage_min(struct tcpm_port *port,
4496 union power_supply_propval *val)
4497{
4498 if (port->pps_data.active)
4499 val->intval = port->pps_data.min_volt * 1000;
4500 else
4501 val->intval = port->supply_voltage * 1000;
4502
4503 return 0;
4504}
4505
4506static int tcpm_psy_get_voltage_max(struct tcpm_port *port,
4507 union power_supply_propval *val)
4508{
4509 if (port->pps_data.active)
4510 val->intval = port->pps_data.max_volt * 1000;
4511 else
4512 val->intval = port->supply_voltage * 1000;
4513
4514 return 0;
4515}
4516
4517static int tcpm_psy_get_voltage_now(struct tcpm_port *port,
4518 union power_supply_propval *val)
4519{
4520 val->intval = port->supply_voltage * 1000;
4521
4522 return 0;
4523}
4524
4525static int tcpm_psy_get_current_max(struct tcpm_port *port,
4526 union power_supply_propval *val)
4527{
4528 if (port->pps_data.active)
4529 val->intval = port->pps_data.max_curr * 1000;
4530 else
4531 val->intval = port->current_limit * 1000;
4532
4533 return 0;
4534}
4535
4536static int tcpm_psy_get_current_now(struct tcpm_port *port,
4537 union power_supply_propval *val)
4538{
4539 val->intval = port->current_limit * 1000;
4540
4541 return 0;
4542}
4543
4544static int tcpm_psy_get_prop(struct power_supply *psy,
4545 enum power_supply_property psp,
4546 union power_supply_propval *val)
4547{
4548 struct tcpm_port *port = power_supply_get_drvdata(psy);
4549 int ret = 0;
4550
4551 switch (psp) {
4552 case POWER_SUPPLY_PROP_USB_TYPE:
4553 val->intval = port->usb_type;
4554 break;
4555 case POWER_SUPPLY_PROP_ONLINE:
4556 ret = tcpm_psy_get_online(port, val);
4557 break;
4558 case POWER_SUPPLY_PROP_VOLTAGE_MIN:
4559 ret = tcpm_psy_get_voltage_min(port, val);
4560 break;
4561 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
4562 ret = tcpm_psy_get_voltage_max(port, val);
4563 break;
4564 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4565 ret = tcpm_psy_get_voltage_now(port, val);
4566 break;
4567 case POWER_SUPPLY_PROP_CURRENT_MAX:
4568 ret = tcpm_psy_get_current_max(port, val);
4569 break;
4570 case POWER_SUPPLY_PROP_CURRENT_NOW:
4571 ret = tcpm_psy_get_current_now(port, val);
4572 break;
4573 default:
4574 ret = -EINVAL;
4575 break;
4576 }
4577
4578 return ret;
4579}
4580
4581static int tcpm_psy_set_online(struct tcpm_port *port,
4582 const union power_supply_propval *val)
4583{
4584 int ret;
4585
4586 switch (val->intval) {
4587 case TCPM_PSY_FIXED_ONLINE:
4588 ret = tcpm_pps_activate(port, false);
4589 break;
4590 case TCPM_PSY_PROG_ONLINE:
4591 ret = tcpm_pps_activate(port, true);
4592 break;
4593 default:
4594 ret = -EINVAL;
4595 break;
4596 }
4597
4598 return ret;
4599}
4600
4601static int tcpm_psy_set_prop(struct power_supply *psy,
4602 enum power_supply_property psp,
4603 const union power_supply_propval *val)
4604{
4605 struct tcpm_port *port = power_supply_get_drvdata(psy);
4606 int ret;
4607
4608 switch (psp) {
4609 case POWER_SUPPLY_PROP_ONLINE:
4610 ret = tcpm_psy_set_online(port, val);
4611 break;
4612 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4613 if (val->intval < port->pps_data.min_volt * 1000 ||
4614 val->intval > port->pps_data.max_volt * 1000)
4615 ret = -EINVAL;
4616 else
4617 ret = tcpm_pps_set_out_volt(port, val->intval / 1000);
4618 break;
4619 case POWER_SUPPLY_PROP_CURRENT_NOW:
4620 if (val->intval > port->pps_data.max_curr * 1000)
4621 ret = -EINVAL;
4622 else
4623 ret = tcpm_pps_set_op_curr(port, val->intval / 1000);
4624 break;
4625 default:
4626 ret = -EINVAL;
4627 break;
4628 }
4629
4630 return ret;
4631}
4632
4633static int tcpm_psy_prop_writeable(struct power_supply *psy,
4634 enum power_supply_property psp)
4635{
4636 switch (psp) {
4637 case POWER_SUPPLY_PROP_ONLINE:
4638 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4639 case POWER_SUPPLY_PROP_CURRENT_NOW:
4640 return 1;
4641 default:
4642 return 0;
4643 }
4644}
4645
4646static enum power_supply_usb_type tcpm_psy_usb_types[] = {
4647 POWER_SUPPLY_USB_TYPE_C,
4648 POWER_SUPPLY_USB_TYPE_PD,
4649 POWER_SUPPLY_USB_TYPE_PD_PPS,
4650};
4651
4652static const char *tcpm_psy_name_prefix = "tcpm-source-psy-";
4653
4654static int devm_tcpm_psy_register(struct tcpm_port *port)
4655{
4656 struct power_supply_config psy_cfg = {};
4657 const char *port_dev_name = dev_name(port->dev);
4658 size_t psy_name_len = strlen(tcpm_psy_name_prefix) +
4659 strlen(port_dev_name) + 1;
4660 char *psy_name;
4661
4662 psy_cfg.drv_data = port;
4663 psy_cfg.fwnode = dev_fwnode(port->dev);
4664 psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL);
4665 if (!psy_name)
4666 return -ENOMEM;
4667
4668 snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix,
4669 port_dev_name);
4670 port->psy_desc.name = psy_name;
4671 port->psy_desc.type = POWER_SUPPLY_TYPE_USB,
4672 port->psy_desc.usb_types = tcpm_psy_usb_types;
4673 port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types);
4674 port->psy_desc.properties = tcpm_psy_props,
4675 port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props),
4676 port->psy_desc.get_property = tcpm_psy_get_prop,
4677 port->psy_desc.set_property = tcpm_psy_set_prop,
4678 port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable,
4679
4680 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
4681
4682 port->psy = devm_power_supply_register(port->dev, &port->psy_desc,
4683 &psy_cfg);
4684
4685 return PTR_ERR_OR_ZERO(port->psy);
4686}
4687
4688static int tcpm_copy_caps(struct tcpm_port *port,
4689 const struct tcpc_config *tcfg)
4690{
4691 if (tcpm_validate_caps(port, tcfg->src_pdo, tcfg->nr_src_pdo) ||
4692 tcpm_validate_caps(port, tcfg->snk_pdo, tcfg->nr_snk_pdo))
4693 return -EINVAL;
4694
4695 port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcfg->src_pdo,
4696 tcfg->nr_src_pdo);
4697 port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcfg->snk_pdo,
4698 tcfg->nr_snk_pdo);
4699
4700 port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcfg->snk_vdo,
4701 tcfg->nr_snk_vdo);
4702
4703 port->operating_snk_mw = tcfg->operating_snk_mw;
4704
4705 port->typec_caps.prefer_role = tcfg->default_role;
4706 port->typec_caps.type = tcfg->type;
4707 port->typec_caps.data = tcfg->data;
4708 port->self_powered = port->tcpc->config->self_powered;
4709
4710 return 0;
4711}
4712
4713struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
4714{
4715 struct tcpm_port *port;
4716 int i, err;
4717
4718 if (!dev || !tcpc ||
4719 !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc ||
4720 !tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus ||
4721 !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit)
4722 return ERR_PTR(-EINVAL);
4723
4724 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
4725 if (!port)
4726 return ERR_PTR(-ENOMEM);
4727
4728 port->dev = dev;
4729 port->tcpc = tcpc;
4730
4731 mutex_init(&port->lock);
4732 mutex_init(&port->swap_lock);
4733
4734 port->wq = create_singlethread_workqueue(dev_name(dev));
4735 if (!port->wq)
4736 return ERR_PTR(-ENOMEM);
4737 INIT_DELAYED_WORK(&port->state_machine, tcpm_state_machine_work);
4738 INIT_DELAYED_WORK(&port->vdm_state_machine, vdm_state_machine_work);
4739 INIT_WORK(&port->event_work, tcpm_pd_event_handler);
4740
4741 spin_lock_init(&port->pd_event_lock);
4742
4743 init_completion(&port->tx_complete);
4744 init_completion(&port->swap_complete);
4745 init_completion(&port->pps_complete);
4746 tcpm_debugfs_init(port);
4747
4748 err = tcpm_fw_get_caps(port, tcpc->fwnode);
4749 if ((err < 0) && tcpc->config)
4750 err = tcpm_copy_caps(port, tcpc->config);
4751 if (err < 0)
4752 goto out_destroy_wq;
4753
4754 if (!tcpc->config || !tcpc->config->try_role_hw)
4755 port->try_role = port->typec_caps.prefer_role;
4756 else
4757 port->try_role = TYPEC_NO_PREFERRED_ROLE;
4758
4759 port->typec_caps.fwnode = tcpc->fwnode;
4760 port->typec_caps.revision = 0x0120;
4761 port->typec_caps.pd_revision = 0x0300;
4762 port->typec_caps.dr_set = tcpm_dr_set;
4763 port->typec_caps.pr_set = tcpm_pr_set;
4764 port->typec_caps.vconn_set = tcpm_vconn_set;
4765 port->typec_caps.try_role = tcpm_try_role;
4766 port->typec_caps.port_type_set = tcpm_port_type_set;
4767
4768 port->partner_desc.identity = &port->partner_ident;
4769 port->port_type = port->typec_caps.type;
4770
4771 port->role_sw = usb_role_switch_get(port->dev);
4772 if (IS_ERR(port->role_sw)) {
4773 err = PTR_ERR(port->role_sw);
4774 goto out_destroy_wq;
4775 }
4776
4777 err = devm_tcpm_psy_register(port);
4778 if (err)
4779 goto out_role_sw_put;
4780
4781 port->typec_port = typec_register_port(port->dev, &port->typec_caps);
4782 if (IS_ERR(port->typec_port)) {
4783 err = PTR_ERR(port->typec_port);
4784 goto out_role_sw_put;
4785 }
4786
4787 if (tcpc->config && tcpc->config->alt_modes) {
4788 const struct typec_altmode_desc *paltmode = tcpc->config->alt_modes;
4789
4790 i = 0;
4791 while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) {
4792 struct typec_altmode *alt;
4793
4794 alt = typec_port_register_altmode(port->typec_port,
4795 paltmode);
4796 if (IS_ERR(alt)) {
4797 tcpm_log(port,
4798 "%s: failed to register port alternate mode 0x%x",
4799 dev_name(dev), paltmode->svid);
4800 break;
4801 }
4802 typec_altmode_set_drvdata(alt, port);
4803 alt->ops = &tcpm_altmode_ops;
4804 port->port_altmode[i] = alt;
4805 i++;
4806 paltmode++;
4807 }
4808 }
4809
4810 mutex_lock(&port->lock);
4811 tcpm_init(port);
4812 mutex_unlock(&port->lock);
4813
4814 tcpm_log(port, "%s: registered", dev_name(dev));
4815 return port;
4816
4817out_role_sw_put:
4818 usb_role_switch_put(port->role_sw);
4819out_destroy_wq:
4820 tcpm_debugfs_exit(port);
4821 destroy_workqueue(port->wq);
4822 return ERR_PTR(err);
4823}
4824EXPORT_SYMBOL_GPL(tcpm_register_port);
4825
4826void tcpm_unregister_port(struct tcpm_port *port)
4827{
4828 int i;
4829
4830 tcpm_reset_port(port);
4831 for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++)
4832 typec_unregister_altmode(port->port_altmode[i]);
4833 typec_unregister_port(port->typec_port);
4834 usb_role_switch_put(port->role_sw);
4835 tcpm_debugfs_exit(port);
4836 destroy_workqueue(port->wq);
4837}
4838EXPORT_SYMBOL_GPL(tcpm_unregister_port);
4839
4840MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>");
4841MODULE_DESCRIPTION("USB Type-C Port Manager");
4842MODULE_LICENSE("GPL");
4843