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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(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 == 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_toggling(struct tcpm_port *port, enum typec_cc_status cc)
2544{
2545 int ret;
2546
2547 if (!port->tcpc->start_toggling)
2548 return false;
2549
2550 tcpm_log_force(port, "Start toggling");
2551 ret = port->tcpc->start_toggling(port->tcpc, port->port_type, cc);
2552 return ret == 0;
2553}
2554
2555static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc)
2556{
2557 tcpm_log(port, "cc:=%d", cc);
2558 port->cc_req = cc;
2559 port->tcpc->set_cc(port->tcpc, cc);
2560}
2561
2562static int tcpm_init_vbus(struct tcpm_port *port)
2563{
2564 int ret;
2565
2566 ret = port->tcpc->set_vbus(port->tcpc, false, false);
2567 port->vbus_source = false;
2568 port->vbus_charge = false;
2569 return ret;
2570}
2571
2572static int tcpm_init_vconn(struct tcpm_port *port)
2573{
2574 int ret;
2575
2576 ret = port->tcpc->set_vconn(port->tcpc, false);
2577 port->vconn_role = TYPEC_SINK;
2578 return ret;
2579}
2580
2581static void tcpm_typec_connect(struct tcpm_port *port)
2582{
2583 if (!port->connected) {
2584
2585 memset(&port->partner_ident, 0, sizeof(port->partner_ident));
2586 port->partner_desc.usb_pd = port->pd_capable;
2587 if (tcpm_port_is_debug(port))
2588 port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG;
2589 else if (tcpm_port_is_audio(port))
2590 port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO;
2591 else
2592 port->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
2593 port->partner = typec_register_partner(port->typec_port,
2594 &port->partner_desc);
2595 port->connected = true;
2596 }
2597}
2598
2599static int tcpm_src_attach(struct tcpm_port *port)
2600{
2601 enum typec_cc_polarity polarity =
2602 port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2
2603 : TYPEC_POLARITY_CC1;
2604 int ret;
2605
2606 if (port->attached)
2607 return 0;
2608
2609 ret = tcpm_set_polarity(port, polarity);
2610 if (ret < 0)
2611 return ret;
2612
2613 ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
2614 if (ret < 0)
2615 return ret;
2616
2617 ret = port->tcpc->set_pd_rx(port->tcpc, true);
2618 if (ret < 0)
2619 goto out_disable_mux;
2620
2621
2622
2623
2624
2625
2626 if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) ||
2627 (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) {
2628 ret = tcpm_set_vconn(port, true);
2629 if (ret < 0)
2630 goto out_disable_pd;
2631 }
2632
2633 ret = tcpm_set_vbus(port, true);
2634 if (ret < 0)
2635 goto out_disable_vconn;
2636
2637 port->pd_capable = false;
2638
2639 port->partner = NULL;
2640
2641 port->attached = true;
2642 port->send_discover = true;
2643
2644 return 0;
2645
2646out_disable_vconn:
2647 tcpm_set_vconn(port, false);
2648out_disable_pd:
2649 port->tcpc->set_pd_rx(port->tcpc, false);
2650out_disable_mux:
2651 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
2652 TYPEC_ORIENTATION_NONE);
2653 return ret;
2654}
2655
2656static void tcpm_typec_disconnect(struct tcpm_port *port)
2657{
2658 if (port->connected) {
2659 typec_unregister_partner(port->partner);
2660 port->partner = NULL;
2661 port->connected = false;
2662 }
2663}
2664
2665static void tcpm_unregister_altmodes(struct tcpm_port *port)
2666{
2667 struct pd_mode_data *modep = &port->mode_data;
2668 int i;
2669
2670 for (i = 0; i < modep->altmodes; i++) {
2671 typec_unregister_altmode(port->partner_altmode[i]);
2672 port->partner_altmode[i] = NULL;
2673 }
2674
2675 memset(modep, 0, sizeof(*modep));
2676}
2677
2678static void tcpm_reset_port(struct tcpm_port *port)
2679{
2680 tcpm_unregister_altmodes(port);
2681 tcpm_typec_disconnect(port);
2682 port->attached = false;
2683 port->pd_capable = false;
2684 port->pps_data.supported = false;
2685
2686
2687
2688
2689
2690 port->rx_msgid = -1;
2691
2692 port->tcpc->set_pd_rx(port->tcpc, false);
2693 tcpm_init_vbus(port);
2694 tcpm_init_vconn(port);
2695 tcpm_set_current_limit(port, 0, 0);
2696 tcpm_set_polarity(port, TYPEC_POLARITY_CC1);
2697 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
2698 TYPEC_ORIENTATION_NONE);
2699 tcpm_set_attached_state(port, false);
2700 port->try_src_count = 0;
2701 port->try_snk_count = 0;
2702 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
2703
2704 power_supply_changed(port->psy);
2705}
2706
2707static void tcpm_detach(struct tcpm_port *port)
2708{
2709 if (!port->attached)
2710 return;
2711
2712 if (tcpm_port_is_disconnected(port))
2713 port->hard_reset_count = 0;
2714
2715 tcpm_reset_port(port);
2716}
2717
2718static void tcpm_src_detach(struct tcpm_port *port)
2719{
2720 tcpm_detach(port);
2721}
2722
2723static int tcpm_snk_attach(struct tcpm_port *port)
2724{
2725 int ret;
2726
2727 if (port->attached)
2728 return 0;
2729
2730 ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ?
2731 TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1);
2732 if (ret < 0)
2733 return ret;
2734
2735 ret = tcpm_set_roles(port, true, TYPEC_SINK, TYPEC_DEVICE);
2736 if (ret < 0)
2737 return ret;
2738
2739 port->pd_capable = false;
2740
2741 port->partner = NULL;
2742
2743 port->attached = true;
2744 port->send_discover = true;
2745
2746 return 0;
2747}
2748
2749static void tcpm_snk_detach(struct tcpm_port *port)
2750{
2751 tcpm_detach(port);
2752}
2753
2754static int tcpm_acc_attach(struct tcpm_port *port)
2755{
2756 int ret;
2757
2758 if (port->attached)
2759 return 0;
2760
2761 ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
2762 if (ret < 0)
2763 return ret;
2764
2765 port->partner = NULL;
2766
2767 tcpm_typec_connect(port);
2768
2769 port->attached = true;
2770
2771 return 0;
2772}
2773
2774static void tcpm_acc_detach(struct tcpm_port *port)
2775{
2776 tcpm_detach(port);
2777}
2778
2779static inline enum tcpm_state hard_reset_state(struct tcpm_port *port)
2780{
2781 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)
2782 return HARD_RESET_SEND;
2783 if (port->pd_capable)
2784 return ERROR_RECOVERY;
2785 if (port->pwr_role == TYPEC_SOURCE)
2786 return SRC_UNATTACHED;
2787 if (port->state == SNK_WAIT_CAPABILITIES)
2788 return SNK_READY;
2789 return SNK_UNATTACHED;
2790}
2791
2792static inline enum tcpm_state unattached_state(struct tcpm_port *port)
2793{
2794 if (port->port_type == TYPEC_PORT_DRP) {
2795 if (port->pwr_role == TYPEC_SOURCE)
2796 return SRC_UNATTACHED;
2797 else
2798 return SNK_UNATTACHED;
2799 } else if (port->port_type == TYPEC_PORT_SRC) {
2800 return SRC_UNATTACHED;
2801 }
2802
2803 return SNK_UNATTACHED;
2804}
2805
2806static void tcpm_check_send_discover(struct tcpm_port *port)
2807{
2808 if (port->data_role == TYPEC_HOST && port->send_discover &&
2809 port->pd_capable) {
2810 tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0);
2811 port->send_discover = false;
2812 }
2813}
2814
2815static void tcpm_swap_complete(struct tcpm_port *port, int result)
2816{
2817 if (port->swap_pending) {
2818 port->swap_status = result;
2819 port->swap_pending = false;
2820 port->non_pd_role_swap = false;
2821 complete(&port->swap_complete);
2822 }
2823}
2824
2825static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc)
2826{
2827 switch (cc) {
2828 case TYPEC_CC_RP_1_5:
2829 return TYPEC_PWR_MODE_1_5A;
2830 case TYPEC_CC_RP_3_0:
2831 return TYPEC_PWR_MODE_3_0A;
2832 case TYPEC_CC_RP_DEF:
2833 default:
2834 return TYPEC_PWR_MODE_USB;
2835 }
2836}
2837
2838static void run_state_machine(struct tcpm_port *port)
2839{
2840 int ret;
2841 enum typec_pwr_opmode opmode;
2842 unsigned int msecs;
2843
2844 port->enter_state = port->state;
2845 switch (port->state) {
2846 case TOGGLING:
2847 break;
2848
2849 case SRC_UNATTACHED:
2850 if (!port->non_pd_role_swap)
2851 tcpm_swap_complete(port, -ENOTCONN);
2852 tcpm_src_detach(port);
2853 if (tcpm_start_toggling(port, tcpm_rp_cc(port))) {
2854 tcpm_set_state(port, TOGGLING, 0);
2855 break;
2856 }
2857 tcpm_set_cc(port, tcpm_rp_cc(port));
2858 if (port->port_type == TYPEC_PORT_DRP)
2859 tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK);
2860 break;
2861 case SRC_ATTACH_WAIT:
2862 if (tcpm_port_is_debug(port))
2863 tcpm_set_state(port, DEBUG_ACC_ATTACHED,
2864 PD_T_CC_DEBOUNCE);
2865 else if (tcpm_port_is_audio(port))
2866 tcpm_set_state(port, AUDIO_ACC_ATTACHED,
2867 PD_T_CC_DEBOUNCE);
2868 else if (tcpm_port_is_source(port))
2869 tcpm_set_state(port,
2870 tcpm_try_snk(port) ? SNK_TRY
2871 : SRC_ATTACHED,
2872 PD_T_CC_DEBOUNCE);
2873 break;
2874
2875 case SNK_TRY:
2876 port->try_snk_count++;
2877
2878
2879
2880
2881
2882
2883
2884
2885 tcpm_set_cc(port, TYPEC_CC_RD);
2886 tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY);
2887 break;
2888 case SNK_TRY_WAIT:
2889 if (tcpm_port_is_sink(port)) {
2890 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0);
2891 } else {
2892 tcpm_set_state(port, SRC_TRYWAIT, 0);
2893 port->max_wait = 0;
2894 }
2895 break;
2896 case SNK_TRY_WAIT_DEBOUNCE:
2897 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS,
2898 PD_T_PD_DEBOUNCE);
2899 break;
2900 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
2901 if (port->vbus_present && tcpm_port_is_sink(port)) {
2902 tcpm_set_state(port, SNK_ATTACHED, 0);
2903 } else {
2904 tcpm_set_state(port, SRC_TRYWAIT, 0);
2905 port->max_wait = 0;
2906 }
2907 break;
2908 case SRC_TRYWAIT:
2909 tcpm_set_cc(port, tcpm_rp_cc(port));
2910 if (port->max_wait == 0) {
2911 port->max_wait = jiffies +
2912 msecs_to_jiffies(PD_T_DRP_TRY);
2913 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
2914 PD_T_DRP_TRY);
2915 } else {
2916 if (time_is_after_jiffies(port->max_wait))
2917 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
2918 jiffies_to_msecs(port->max_wait -
2919 jiffies));
2920 else
2921 tcpm_set_state(port, SNK_UNATTACHED, 0);
2922 }
2923 break;
2924 case SRC_TRYWAIT_DEBOUNCE:
2925 tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE);
2926 break;
2927 case SRC_TRYWAIT_UNATTACHED:
2928 tcpm_set_state(port, SNK_UNATTACHED, 0);
2929 break;
2930
2931 case SRC_ATTACHED:
2932 ret = tcpm_src_attach(port);
2933 tcpm_set_state(port, SRC_UNATTACHED,
2934 ret < 0 ? 0 : PD_T_PS_SOURCE_ON);
2935 break;
2936 case SRC_STARTUP:
2937 opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port));
2938 typec_set_pwr_opmode(port->typec_port, opmode);
2939 port->pwr_opmode = TYPEC_PWR_MODE_USB;
2940 port->caps_count = 0;
2941 port->negotiated_rev = PD_MAX_REV;
2942 port->message_id = 0;
2943 port->rx_msgid = -1;
2944 port->explicit_contract = false;
2945 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
2946 break;
2947 case SRC_SEND_CAPABILITIES:
2948 port->caps_count++;
2949 if (port->caps_count > PD_N_CAPS_COUNT) {
2950 tcpm_set_state(port, SRC_READY, 0);
2951 break;
2952 }
2953 ret = tcpm_pd_send_source_caps(port);
2954 if (ret < 0) {
2955 tcpm_set_state(port, SRC_SEND_CAPABILITIES,
2956 PD_T_SEND_SOURCE_CAP);
2957 } else {
2958
2959
2960
2961
2962
2963
2964 port->caps_count = 0;
2965 port->pd_capable = true;
2966 tcpm_set_state_cond(port, SRC_SEND_CAPABILITIES_TIMEOUT,
2967 PD_T_SEND_SOURCE_CAP);
2968 }
2969 break;
2970 case SRC_SEND_CAPABILITIES_TIMEOUT:
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) {
2985 tcpm_set_state(port, HARD_RESET_SEND, 0);
2986 } else if (port->negotiated_rev > PD_REV20) {
2987 port->negotiated_rev--;
2988 port->hard_reset_count = 0;
2989 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
2990 } else {
2991 tcpm_set_state(port, hard_reset_state(port), 0);
2992 }
2993 break;
2994 case SRC_NEGOTIATE_CAPABILITIES:
2995 ret = tcpm_pd_check_request(port);
2996 if (ret < 0) {
2997 tcpm_pd_send_control(port, PD_CTRL_REJECT);
2998 if (!port->explicit_contract) {
2999 tcpm_set_state(port,
3000 SRC_WAIT_NEW_CAPABILITIES, 0);
3001 } else {
3002 tcpm_set_state(port, SRC_READY, 0);
3003 }
3004 } else {
3005 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3006 tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
3007 PD_T_SRC_TRANSITION);
3008 }
3009 break;
3010 case SRC_TRANSITION_SUPPLY:
3011
3012 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
3013 port->explicit_contract = true;
3014 typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD);
3015 port->pwr_opmode = TYPEC_PWR_MODE_PD;
3016 tcpm_set_state_cond(port, SRC_READY, 0);
3017 break;
3018 case SRC_READY:
3019#if 1
3020 port->hard_reset_count = 0;
3021#endif
3022 port->try_src_count = 0;
3023
3024 tcpm_swap_complete(port, 0);
3025 tcpm_typec_connect(port);
3026
3027 tcpm_check_send_discover(port);
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041 break;
3042 case SRC_WAIT_NEW_CAPABILITIES:
3043
3044 break;
3045
3046
3047 case SNK_UNATTACHED:
3048 if (!port->non_pd_role_swap)
3049 tcpm_swap_complete(port, -ENOTCONN);
3050 tcpm_pps_complete(port, -ENOTCONN);
3051 tcpm_snk_detach(port);
3052 if (tcpm_start_toggling(port, TYPEC_CC_RD)) {
3053 tcpm_set_state(port, TOGGLING, 0);
3054 break;
3055 }
3056 tcpm_set_cc(port, TYPEC_CC_RD);
3057 if (port->port_type == TYPEC_PORT_DRP)
3058 tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC);
3059 break;
3060 case SNK_ATTACH_WAIT:
3061 if ((port->cc1 == TYPEC_CC_OPEN &&
3062 port->cc2 != TYPEC_CC_OPEN) ||
3063 (port->cc1 != TYPEC_CC_OPEN &&
3064 port->cc2 == TYPEC_CC_OPEN))
3065 tcpm_set_state(port, SNK_DEBOUNCED,
3066 PD_T_CC_DEBOUNCE);
3067 else if (tcpm_port_is_disconnected(port))
3068 tcpm_set_state(port, SNK_UNATTACHED,
3069 PD_T_PD_DEBOUNCE);
3070 break;
3071 case SNK_DEBOUNCED:
3072 if (tcpm_port_is_disconnected(port))
3073 tcpm_set_state(port, SNK_UNATTACHED,
3074 PD_T_PD_DEBOUNCE);
3075 else if (port->vbus_present)
3076 tcpm_set_state(port,
3077 tcpm_try_src(port) ? SRC_TRY
3078 : SNK_ATTACHED,
3079 0);
3080 else
3081
3082 tcpm_set_state(port, PORT_RESET, PD_T_PS_SOURCE_ON);
3083 break;
3084
3085 case SRC_TRY:
3086 port->try_src_count++;
3087 tcpm_set_cc(port, tcpm_rp_cc(port));
3088 port->max_wait = 0;
3089 tcpm_set_state(port, SRC_TRY_WAIT, 0);
3090 break;
3091 case SRC_TRY_WAIT:
3092 if (port->max_wait == 0) {
3093 port->max_wait = jiffies +
3094 msecs_to_jiffies(PD_T_DRP_TRY);
3095 msecs = PD_T_DRP_TRY;
3096 } else {
3097 if (time_is_after_jiffies(port->max_wait))
3098 msecs = jiffies_to_msecs(port->max_wait -
3099 jiffies);
3100 else
3101 msecs = 0;
3102 }
3103 tcpm_set_state(port, SNK_TRYWAIT, msecs);
3104 break;
3105 case SRC_TRY_DEBOUNCE:
3106 tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE);
3107 break;
3108 case SNK_TRYWAIT:
3109 tcpm_set_cc(port, TYPEC_CC_RD);
3110 tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE);
3111 break;
3112 case SNK_TRYWAIT_VBUS:
3113
3114
3115
3116
3117
3118 if (port->vbus_present && tcpm_port_is_sink(port)) {
3119 tcpm_set_state(port, SNK_ATTACHED, 0);
3120 break;
3121 }
3122 if (!tcpm_port_is_sink(port))
3123 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
3124 break;
3125 case SNK_TRYWAIT_DEBOUNCE:
3126 tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE);
3127 break;
3128 case SNK_ATTACHED:
3129 ret = tcpm_snk_attach(port);
3130 if (ret < 0)
3131 tcpm_set_state(port, SNK_UNATTACHED, 0);
3132 else
3133 tcpm_set_state(port, SNK_STARTUP, 0);
3134 break;
3135 case SNK_STARTUP:
3136 opmode = tcpm_get_pwr_opmode(port->polarity ?
3137 port->cc2 : port->cc1);
3138 typec_set_pwr_opmode(port->typec_port, opmode);
3139 port->pwr_opmode = TYPEC_PWR_MODE_USB;
3140 port->negotiated_rev = PD_MAX_REV;
3141 port->message_id = 0;
3142 port->rx_msgid = -1;
3143 port->explicit_contract = false;
3144 tcpm_set_state(port, SNK_DISCOVERY, 0);
3145 break;
3146 case SNK_DISCOVERY:
3147 if (port->vbus_present) {
3148 tcpm_set_current_limit(port,
3149 tcpm_get_current_limit(port),
3150 5000);
3151 tcpm_set_charge(port, true);
3152 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3153 break;
3154 }
3155
3156
3157
3158
3159
3160 tcpm_set_state(port, hard_reset_state(port),
3161 port->port_type == TYPEC_PORT_DRP ?
3162 PD_T_DB_DETECT : PD_T_NO_RESPONSE);
3163 break;
3164 case SNK_DISCOVERY_DEBOUNCE:
3165 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE,
3166 PD_T_CC_DEBOUNCE);
3167 break;
3168 case SNK_DISCOVERY_DEBOUNCE_DONE:
3169 if (!tcpm_port_is_disconnected(port) &&
3170 tcpm_port_is_sink(port) &&
3171 time_is_after_jiffies(port->delayed_runtime)) {
3172 tcpm_set_state(port, SNK_DISCOVERY,
3173 jiffies_to_msecs(port->delayed_runtime -
3174 jiffies));
3175 break;
3176 }
3177 tcpm_set_state(port, unattached_state(port), 0);
3178 break;
3179 case SNK_WAIT_CAPABILITIES:
3180 ret = port->tcpc->set_pd_rx(port->tcpc, true);
3181 if (ret < 0) {
3182 tcpm_set_state(port, SNK_READY, 0);
3183 break;
3184 }
3185
3186
3187
3188
3189
3190
3191 if (port->vbus_never_low) {
3192 port->vbus_never_low = false;
3193 tcpm_set_state(port, SOFT_RESET_SEND,
3194 PD_T_SINK_WAIT_CAP);
3195 } else {
3196 tcpm_set_state(port, hard_reset_state(port),
3197 PD_T_SINK_WAIT_CAP);
3198 }
3199 break;
3200 case SNK_NEGOTIATE_CAPABILITIES:
3201 port->pd_capable = true;
3202 port->hard_reset_count = 0;
3203 ret = tcpm_pd_send_request(port);
3204 if (ret < 0) {
3205
3206 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3207 } else {
3208 tcpm_set_state_cond(port, hard_reset_state(port),
3209 PD_T_SENDER_RESPONSE);
3210 }
3211 break;
3212 case SNK_NEGOTIATE_PPS_CAPABILITIES:
3213 ret = tcpm_pd_send_pps_request(port);
3214 if (ret < 0) {
3215 port->pps_status = ret;
3216
3217
3218
3219
3220
3221 if (port->update_sink_caps)
3222 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
3223 else
3224 tcpm_set_state(port, SNK_READY, 0);
3225 } else {
3226 tcpm_set_state_cond(port, hard_reset_state(port),
3227 PD_T_SENDER_RESPONSE);
3228 }
3229 break;
3230 case SNK_TRANSITION_SINK:
3231 case SNK_TRANSITION_SINK_VBUS:
3232 tcpm_set_state(port, hard_reset_state(port),
3233 PD_T_PS_TRANSITION);
3234 break;
3235 case SNK_READY:
3236 port->try_snk_count = 0;
3237 port->update_sink_caps = false;
3238 if (port->explicit_contract) {
3239 typec_set_pwr_opmode(port->typec_port,
3240 TYPEC_PWR_MODE_PD);
3241 port->pwr_opmode = TYPEC_PWR_MODE_PD;
3242 }
3243
3244 tcpm_swap_complete(port, 0);
3245 tcpm_typec_connect(port);
3246 tcpm_check_send_discover(port);
3247 tcpm_pps_complete(port, port->pps_status);
3248
3249 power_supply_changed(port->psy);
3250
3251 break;
3252
3253
3254 case ACC_UNATTACHED:
3255 tcpm_acc_detach(port);
3256 tcpm_set_state(port, SRC_UNATTACHED, 0);
3257 break;
3258 case DEBUG_ACC_ATTACHED:
3259 case AUDIO_ACC_ATTACHED:
3260 ret = tcpm_acc_attach(port);
3261 if (ret < 0)
3262 tcpm_set_state(port, ACC_UNATTACHED, 0);
3263 break;
3264 case AUDIO_ACC_DEBOUNCE:
3265 tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE);
3266 break;
3267
3268
3269 case HARD_RESET_SEND:
3270 tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL);
3271 tcpm_set_state(port, HARD_RESET_START, 0);
3272 break;
3273 case HARD_RESET_START:
3274 port->hard_reset_count++;
3275 port->tcpc->set_pd_rx(port->tcpc, false);
3276 tcpm_unregister_altmodes(port);
3277 port->send_discover = true;
3278 if (port->pwr_role == TYPEC_SOURCE)
3279 tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF,
3280 PD_T_PS_HARD_RESET);
3281 else
3282 tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0);
3283 break;
3284 case SRC_HARD_RESET_VBUS_OFF:
3285 tcpm_set_vconn(port, true);
3286 tcpm_set_vbus(port, false);
3287 tcpm_set_roles(port, port->self_powered, TYPEC_SOURCE,
3288 TYPEC_HOST);
3289 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
3290 break;
3291 case SRC_HARD_RESET_VBUS_ON:
3292 tcpm_set_vbus(port, true);
3293 port->tcpc->set_pd_rx(port->tcpc, true);
3294 tcpm_set_attached_state(port, true);
3295 tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON);
3296 break;
3297 case SNK_HARD_RESET_SINK_OFF:
3298 memset(&port->pps_data, 0, sizeof(port->pps_data));
3299 tcpm_set_vconn(port, false);
3300 if (port->pd_capable)
3301 tcpm_set_charge(port, false);
3302 tcpm_set_roles(port, port->self_powered, TYPEC_SINK,
3303 TYPEC_DEVICE);
3304
3305
3306
3307
3308
3309 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V);
3310 break;
3311 case SNK_HARD_RESET_WAIT_VBUS:
3312
3313 tcpm_set_state(port, SNK_UNATTACHED,
3314 PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON);
3315 break;
3316 case SNK_HARD_RESET_SINK_ON:
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333 if (port->pd_capable) {
3334 tcpm_set_current_limit(port,
3335 tcpm_get_current_limit(port),
3336 5000);
3337 tcpm_set_charge(port, true);
3338 }
3339 tcpm_set_attached_state(port, true);
3340 tcpm_set_state(port, SNK_STARTUP, 0);
3341 break;
3342
3343
3344 case SOFT_RESET:
3345 port->message_id = 0;
3346 port->rx_msgid = -1;
3347 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3348 if (port->pwr_role == TYPEC_SOURCE)
3349 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
3350 else
3351 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3352 break;
3353 case SOFT_RESET_SEND:
3354 port->message_id = 0;
3355 port->rx_msgid = -1;
3356 if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET))
3357 tcpm_set_state_cond(port, hard_reset_state(port), 0);
3358 else
3359 tcpm_set_state_cond(port, hard_reset_state(port),
3360 PD_T_SENDER_RESPONSE);
3361 break;
3362
3363
3364 case DR_SWAP_SEND:
3365 tcpm_pd_send_control(port, PD_CTRL_DR_SWAP);
3366 tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT,
3367 PD_T_SENDER_RESPONSE);
3368 break;
3369 case DR_SWAP_ACCEPT:
3370 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3371 tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0);
3372 break;
3373 case DR_SWAP_SEND_TIMEOUT:
3374 tcpm_swap_complete(port, -ETIMEDOUT);
3375 tcpm_set_state(port, ready_state(port), 0);
3376 break;
3377 case DR_SWAP_CHANGE_DR:
3378 if (port->data_role == TYPEC_HOST) {
3379 tcpm_unregister_altmodes(port);
3380 tcpm_set_roles(port, true, port->pwr_role,
3381 TYPEC_DEVICE);
3382 } else {
3383 tcpm_set_roles(port, true, port->pwr_role,
3384 TYPEC_HOST);
3385 port->send_discover = true;
3386 }
3387 tcpm_set_state(port, ready_state(port), 0);
3388 break;
3389
3390
3391 case PR_SWAP_ACCEPT:
3392 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3393 tcpm_set_state(port, PR_SWAP_START, 0);
3394 break;
3395 case PR_SWAP_SEND:
3396 tcpm_pd_send_control(port, PD_CTRL_PR_SWAP);
3397 tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT,
3398 PD_T_SENDER_RESPONSE);
3399 break;
3400 case PR_SWAP_SEND_TIMEOUT:
3401 tcpm_swap_complete(port, -ETIMEDOUT);
3402 tcpm_set_state(port, ready_state(port), 0);
3403 break;
3404 case PR_SWAP_START:
3405 if (port->pwr_role == TYPEC_SOURCE)
3406 tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF,
3407 PD_T_SRC_TRANSITION);
3408 else
3409 tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0);
3410 break;
3411 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3412 tcpm_set_vbus(port, false);
3413 port->explicit_contract = false;
3414
3415 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF,
3416 PD_T_SRCSWAPSTDBY);
3417 break;
3418 case PR_SWAP_SRC_SNK_SOURCE_OFF:
3419 tcpm_set_cc(port, TYPEC_CC_RD);
3420
3421 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED,
3422 PD_T_CC_DEBOUNCE);
3423 break;
3424 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
3425
3426
3427
3428
3429
3430
3431
3432 tcpm_set_pwr_role(port, TYPEC_SINK);
3433 if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
3434 tcpm_set_state(port, ERROR_RECOVERY, 0);
3435 break;
3436 }
3437 tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON);
3438 break;
3439 case PR_SWAP_SRC_SNK_SINK_ON:
3440 tcpm_set_state(port, SNK_STARTUP, 0);
3441 break;
3442 case PR_SWAP_SNK_SRC_SINK_OFF:
3443 tcpm_set_charge(port, false);
3444 tcpm_set_state(port, hard_reset_state(port),
3445 PD_T_PS_SOURCE_OFF);
3446 break;
3447 case PR_SWAP_SNK_SRC_SOURCE_ON:
3448 tcpm_set_cc(port, tcpm_rp_cc(port));
3449 tcpm_set_vbus(port, true);
3450
3451
3452
3453
3454
3455 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP,
3456 PD_T_NEWSRC);
3457 break;
3458 case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP:
3459
3460
3461
3462
3463
3464
3465
3466 tcpm_set_pwr_role(port, TYPEC_SOURCE);
3467 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
3468 tcpm_set_state(port, SRC_STARTUP, 0);
3469 break;
3470
3471 case VCONN_SWAP_ACCEPT:
3472 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3473 tcpm_set_state(port, VCONN_SWAP_START, 0);
3474 break;
3475 case VCONN_SWAP_SEND:
3476 tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP);
3477 tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT,
3478 PD_T_SENDER_RESPONSE);
3479 break;
3480 case VCONN_SWAP_SEND_TIMEOUT:
3481 tcpm_swap_complete(port, -ETIMEDOUT);
3482 tcpm_set_state(port, ready_state(port), 0);
3483 break;
3484 case VCONN_SWAP_START:
3485 if (port->vconn_role == TYPEC_SOURCE)
3486 tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0);
3487 else
3488 tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0);
3489 break;
3490 case VCONN_SWAP_WAIT_FOR_VCONN:
3491 tcpm_set_state(port, hard_reset_state(port),
3492 PD_T_VCONN_SOURCE_ON);
3493 break;
3494 case VCONN_SWAP_TURN_ON_VCONN:
3495 tcpm_set_vconn(port, true);
3496 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
3497 tcpm_set_state(port, ready_state(port), 0);
3498 break;
3499 case VCONN_SWAP_TURN_OFF_VCONN:
3500 tcpm_set_vconn(port, false);
3501 tcpm_set_state(port, ready_state(port), 0);
3502 break;
3503
3504 case DR_SWAP_CANCEL:
3505 case PR_SWAP_CANCEL:
3506 case VCONN_SWAP_CANCEL:
3507 tcpm_swap_complete(port, port->swap_status);
3508 if (port->pwr_role == TYPEC_SOURCE)
3509 tcpm_set_state(port, SRC_READY, 0);
3510 else
3511 tcpm_set_state(port, SNK_READY, 0);
3512 break;
3513
3514 case BIST_RX:
3515 switch (BDO_MODE_MASK(port->bist_request)) {
3516 case BDO_MODE_CARRIER2:
3517 tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
3518 break;
3519 default:
3520 break;
3521 }
3522
3523 tcpm_set_state(port, unattached_state(port), 0);
3524 break;
3525 case GET_STATUS_SEND:
3526 tcpm_pd_send_control(port, PD_CTRL_GET_STATUS);
3527 tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT,
3528 PD_T_SENDER_RESPONSE);
3529 break;
3530 case GET_STATUS_SEND_TIMEOUT:
3531 tcpm_set_state(port, ready_state(port), 0);
3532 break;
3533 case GET_PPS_STATUS_SEND:
3534 tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS);
3535 tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT,
3536 PD_T_SENDER_RESPONSE);
3537 break;
3538 case GET_PPS_STATUS_SEND_TIMEOUT:
3539 tcpm_set_state(port, ready_state(port), 0);
3540 break;
3541 case ERROR_RECOVERY:
3542 tcpm_swap_complete(port, -EPROTO);
3543 tcpm_pps_complete(port, -EPROTO);
3544 tcpm_set_state(port, PORT_RESET, 0);
3545 break;
3546 case PORT_RESET:
3547 tcpm_reset_port(port);
3548 tcpm_set_cc(port, TYPEC_CC_OPEN);
3549 tcpm_set_state(port, PORT_RESET_WAIT_OFF,
3550 PD_T_ERROR_RECOVERY);
3551 break;
3552 case PORT_RESET_WAIT_OFF:
3553 tcpm_set_state(port,
3554 tcpm_default_state(port),
3555 port->vbus_present ? PD_T_PS_SOURCE_OFF : 0);
3556 break;
3557 default:
3558 WARN(1, "Unexpected port state %d\n", port->state);
3559 break;
3560 }
3561}
3562
3563static void tcpm_state_machine_work(struct work_struct *work)
3564{
3565 struct tcpm_port *port = container_of(work, struct tcpm_port,
3566 state_machine.work);
3567 enum tcpm_state prev_state;
3568
3569 mutex_lock(&port->lock);
3570 port->state_machine_running = true;
3571
3572 if (port->queued_message && tcpm_send_queued_message(port))
3573 goto done;
3574
3575
3576 if (port->delayed_state) {
3577 tcpm_log(port, "state change %s -> %s [delayed %ld ms]",
3578 tcpm_states[port->state],
3579 tcpm_states[port->delayed_state], port->delay_ms);
3580 port->prev_state = port->state;
3581 port->state = port->delayed_state;
3582 port->delayed_state = INVALID_STATE;
3583 }
3584
3585
3586
3587
3588
3589 do {
3590 prev_state = port->state;
3591 run_state_machine(port);
3592 if (port->queued_message)
3593 tcpm_send_queued_message(port);
3594 } while (port->state != prev_state && !port->delayed_state);
3595
3596done:
3597 port->state_machine_running = false;
3598 mutex_unlock(&port->lock);
3599}
3600
3601static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
3602 enum typec_cc_status cc2)
3603{
3604 enum typec_cc_status old_cc1, old_cc2;
3605 enum tcpm_state new_state;
3606
3607 old_cc1 = port->cc1;
3608 old_cc2 = port->cc2;
3609 port->cc1 = cc1;
3610 port->cc2 = cc2;
3611
3612 tcpm_log_force(port,
3613 "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]",
3614 old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state],
3615 port->polarity,
3616 tcpm_port_is_disconnected(port) ? "disconnected"
3617 : "connected");
3618
3619 switch (port->state) {
3620 case TOGGLING:
3621 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
3622 tcpm_port_is_source(port))
3623 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3624 else if (tcpm_port_is_sink(port))
3625 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3626 break;
3627 case SRC_UNATTACHED:
3628 case ACC_UNATTACHED:
3629 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
3630 tcpm_port_is_source(port))
3631 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3632 break;
3633 case SRC_ATTACH_WAIT:
3634 if (tcpm_port_is_disconnected(port) ||
3635 tcpm_port_is_audio_detached(port))
3636 tcpm_set_state(port, SRC_UNATTACHED, 0);
3637 else if (cc1 != old_cc1 || cc2 != old_cc2)
3638 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3639 break;
3640 case SRC_ATTACHED:
3641 case SRC_SEND_CAPABILITIES:
3642 case SRC_READY:
3643 if (tcpm_port_is_disconnected(port) ||
3644 !tcpm_port_is_source(port))
3645 tcpm_set_state(port, SRC_UNATTACHED, 0);
3646 break;
3647 case SNK_UNATTACHED:
3648 if (tcpm_port_is_sink(port))
3649 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3650 break;
3651 case SNK_ATTACH_WAIT:
3652 if ((port->cc1 == TYPEC_CC_OPEN &&
3653 port->cc2 != TYPEC_CC_OPEN) ||
3654 (port->cc1 != TYPEC_CC_OPEN &&
3655 port->cc2 == TYPEC_CC_OPEN))
3656 new_state = SNK_DEBOUNCED;
3657 else if (tcpm_port_is_disconnected(port))
3658 new_state = SNK_UNATTACHED;
3659 else
3660 break;
3661 if (new_state != port->delayed_state)
3662 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3663 break;
3664 case SNK_DEBOUNCED:
3665 if (tcpm_port_is_disconnected(port))
3666 new_state = SNK_UNATTACHED;
3667 else if (port->vbus_present)
3668 new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED;
3669 else
3670 new_state = SNK_UNATTACHED;
3671 if (new_state != port->delayed_state)
3672 tcpm_set_state(port, SNK_DEBOUNCED, 0);
3673 break;
3674 case SNK_READY:
3675 if (tcpm_port_is_disconnected(port))
3676 tcpm_set_state(port, unattached_state(port), 0);
3677 else if (!port->pd_capable &&
3678 (cc1 != old_cc1 || cc2 != old_cc2))
3679 tcpm_set_current_limit(port,
3680 tcpm_get_current_limit(port),
3681 5000);
3682 break;
3683
3684 case AUDIO_ACC_ATTACHED:
3685 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
3686 tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0);
3687 break;
3688 case AUDIO_ACC_DEBOUNCE:
3689 if (tcpm_port_is_audio(port))
3690 tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0);
3691 break;
3692
3693 case DEBUG_ACC_ATTACHED:
3694 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
3695 tcpm_set_state(port, ACC_UNATTACHED, 0);
3696 break;
3697
3698 case SNK_TRY:
3699
3700 break;
3701
3702 case SNK_DISCOVERY:
3703
3704 if (tcpm_port_is_disconnected(port))
3705 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0);
3706 break;
3707 case SNK_DISCOVERY_DEBOUNCE:
3708 break;
3709
3710 case SRC_TRYWAIT:
3711
3712 if (!port->vbus_present && tcpm_port_is_source(port))
3713 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
3714 break;
3715 case SRC_TRYWAIT_DEBOUNCE:
3716 if (port->vbus_present || !tcpm_port_is_source(port))
3717 tcpm_set_state(port, SRC_TRYWAIT, 0);
3718 break;
3719 case SNK_TRY_WAIT_DEBOUNCE:
3720 if (!tcpm_port_is_sink(port)) {
3721 port->max_wait = 0;
3722 tcpm_set_state(port, SRC_TRYWAIT, 0);
3723 }
3724 break;
3725 case SRC_TRY_WAIT:
3726 if (tcpm_port_is_source(port))
3727 tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0);
3728 break;
3729 case SRC_TRY_DEBOUNCE:
3730 tcpm_set_state(port, SRC_TRY_WAIT, 0);
3731 break;
3732 case SNK_TRYWAIT_DEBOUNCE:
3733 if (tcpm_port_is_sink(port))
3734 tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0);
3735 break;
3736 case SNK_TRYWAIT_VBUS:
3737 if (!tcpm_port_is_sink(port))
3738 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
3739 break;
3740 case SNK_TRYWAIT:
3741
3742 break;
3743 case PR_SWAP_SNK_SRC_SINK_OFF:
3744 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3745 case PR_SWAP_SRC_SNK_SOURCE_OFF:
3746 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
3747 case PR_SWAP_SNK_SRC_SOURCE_ON:
3748
3749
3750
3751
3752 break;
3753
3754 default:
3755 if (tcpm_port_is_disconnected(port))
3756 tcpm_set_state(port, unattached_state(port), 0);
3757 break;
3758 }
3759}
3760
3761static void _tcpm_pd_vbus_on(struct tcpm_port *port)
3762{
3763 tcpm_log_force(port, "VBUS on");
3764 port->vbus_present = true;
3765 switch (port->state) {
3766 case SNK_TRANSITION_SINK_VBUS:
3767 port->explicit_contract = true;
3768 tcpm_set_state(port, SNK_READY, 0);
3769 break;
3770 case SNK_DISCOVERY:
3771 tcpm_set_state(port, SNK_DISCOVERY, 0);
3772 break;
3773
3774 case SNK_DEBOUNCED:
3775 tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY
3776 : SNK_ATTACHED,
3777 0);
3778 break;
3779 case SNK_HARD_RESET_WAIT_VBUS:
3780 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0);
3781 break;
3782 case SRC_ATTACHED:
3783 tcpm_set_state(port, SRC_STARTUP, 0);
3784 break;
3785 case SRC_HARD_RESET_VBUS_ON:
3786 tcpm_set_state(port, SRC_STARTUP, 0);
3787 break;
3788
3789 case SNK_TRY:
3790
3791 break;
3792 case SRC_TRYWAIT:
3793
3794 break;
3795 case SRC_TRYWAIT_DEBOUNCE:
3796 tcpm_set_state(port, SRC_TRYWAIT, 0);
3797 break;
3798 case SNK_TRY_WAIT_DEBOUNCE:
3799
3800 break;
3801 case SNK_TRYWAIT:
3802
3803 break;
3804 case SNK_TRYWAIT_VBUS:
3805 if (tcpm_port_is_sink(port))
3806 tcpm_set_state(port, SNK_ATTACHED, 0);
3807 break;
3808 case SNK_TRYWAIT_DEBOUNCE:
3809
3810 break;
3811 case SRC_TRY_WAIT:
3812 case SRC_TRY_DEBOUNCE:
3813
3814 break;
3815 default:
3816 break;
3817 }
3818}
3819
3820static void _tcpm_pd_vbus_off(struct tcpm_port *port)
3821{
3822 tcpm_log_force(port, "VBUS off");
3823 port->vbus_present = false;
3824 port->vbus_never_low = false;
3825 switch (port->state) {
3826 case SNK_HARD_RESET_SINK_OFF:
3827 tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0);
3828 break;
3829 case SRC_HARD_RESET_VBUS_OFF:
3830 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, 0);
3831 break;
3832 case HARD_RESET_SEND:
3833 break;
3834
3835 case SNK_TRY:
3836
3837 break;
3838 case SRC_TRYWAIT:
3839
3840 if (tcpm_port_is_source(port))
3841 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
3842 break;
3843 case SNK_TRY_WAIT_DEBOUNCE:
3844
3845 break;
3846 case SNK_TRYWAIT:
3847 case SNK_TRYWAIT_VBUS:
3848 case SNK_TRYWAIT_DEBOUNCE:
3849 break;
3850 case SNK_ATTACH_WAIT:
3851 tcpm_set_state(port, SNK_UNATTACHED, 0);
3852 break;
3853
3854 case SNK_NEGOTIATE_CAPABILITIES:
3855 break;
3856
3857 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3858 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0);
3859 break;
3860
3861 case PR_SWAP_SNK_SRC_SINK_OFF:
3862
3863 break;
3864
3865 case PORT_RESET_WAIT_OFF:
3866 tcpm_set_state(port, tcpm_default_state(port), 0);
3867 break;
3868 case SRC_TRY_WAIT:
3869 case SRC_TRY_DEBOUNCE:
3870
3871 break;
3872 default:
3873 if (port->pwr_role == TYPEC_SINK &&
3874 port->attached)
3875 tcpm_set_state(port, SNK_UNATTACHED, 0);
3876 break;
3877 }
3878}
3879
3880static void _tcpm_pd_hard_reset(struct tcpm_port *port)
3881{
3882 tcpm_log_force(port, "Received hard reset");
3883
3884
3885
3886
3887 tcpm_set_state(port,
3888 port->hard_reset_count < PD_N_HARD_RESET_COUNT ?
3889 HARD_RESET_START : ERROR_RECOVERY,
3890 0);
3891}
3892
3893static void tcpm_pd_event_handler(struct work_struct *work)
3894{
3895 struct tcpm_port *port = container_of(work, struct tcpm_port,
3896 event_work);
3897 u32 events;
3898
3899 mutex_lock(&port->lock);
3900
3901 spin_lock(&port->pd_event_lock);
3902 while (port->pd_events) {
3903 events = port->pd_events;
3904 port->pd_events = 0;
3905 spin_unlock(&port->pd_event_lock);
3906 if (events & TCPM_RESET_EVENT)
3907 _tcpm_pd_hard_reset(port);
3908 if (events & TCPM_VBUS_EVENT) {
3909 bool vbus;
3910
3911 vbus = port->tcpc->get_vbus(port->tcpc);
3912 if (vbus)
3913 _tcpm_pd_vbus_on(port);
3914 else
3915 _tcpm_pd_vbus_off(port);
3916 }
3917 if (events & TCPM_CC_EVENT) {
3918 enum typec_cc_status cc1, cc2;
3919
3920 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
3921 _tcpm_cc_change(port, cc1, cc2);
3922 }
3923 spin_lock(&port->pd_event_lock);
3924 }
3925 spin_unlock(&port->pd_event_lock);
3926 mutex_unlock(&port->lock);
3927}
3928
3929void tcpm_cc_change(struct tcpm_port *port)
3930{
3931 spin_lock(&port->pd_event_lock);
3932 port->pd_events |= TCPM_CC_EVENT;
3933 spin_unlock(&port->pd_event_lock);
3934 queue_work(port->wq, &port->event_work);
3935}
3936EXPORT_SYMBOL_GPL(tcpm_cc_change);
3937
3938void tcpm_vbus_change(struct tcpm_port *port)
3939{
3940 spin_lock(&port->pd_event_lock);
3941 port->pd_events |= TCPM_VBUS_EVENT;
3942 spin_unlock(&port->pd_event_lock);
3943 queue_work(port->wq, &port->event_work);
3944}
3945EXPORT_SYMBOL_GPL(tcpm_vbus_change);
3946
3947void tcpm_pd_hard_reset(struct tcpm_port *port)
3948{
3949 spin_lock(&port->pd_event_lock);
3950 port->pd_events = TCPM_RESET_EVENT;
3951 spin_unlock(&port->pd_event_lock);
3952 queue_work(port->wq, &port->event_work);
3953}
3954EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
3955
3956static int tcpm_dr_set(const struct typec_capability *cap,
3957 enum typec_data_role data)
3958{
3959 struct tcpm_port *port = typec_cap_to_tcpm(cap);
3960 int ret;
3961
3962 mutex_lock(&port->swap_lock);
3963 mutex_lock(&port->lock);
3964
3965 if (port->port_type != TYPEC_PORT_DRP) {
3966 ret = -EINVAL;
3967 goto port_unlock;
3968 }
3969 if (port->state != SRC_READY && port->state != SNK_READY) {
3970 ret = -EAGAIN;
3971 goto port_unlock;
3972 }
3973
3974 if (port->data_role == data) {
3975 ret = 0;
3976 goto port_unlock;
3977 }
3978
3979
3980
3981
3982
3983
3984
3985
3986 if (!port->pd_capable) {
3987
3988
3989
3990
3991
3992 if (port->try_role == TYPEC_NO_PREFERRED_ROLE ||
3993 port->try_role == port->pwr_role) {
3994 ret = -EINVAL;
3995 goto port_unlock;
3996 }
3997 port->non_pd_role_swap = true;
3998 tcpm_set_state(port, PORT_RESET, 0);
3999 } else {
4000 tcpm_set_state(port, DR_SWAP_SEND, 0);
4001 }
4002
4003 port->swap_status = 0;
4004 port->swap_pending = true;
4005 reinit_completion(&port->swap_complete);
4006 mutex_unlock(&port->lock);
4007
4008 if (!wait_for_completion_timeout(&port->swap_complete,
4009 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4010 ret = -ETIMEDOUT;
4011 else
4012 ret = port->swap_status;
4013
4014 port->non_pd_role_swap = false;
4015 goto swap_unlock;
4016
4017port_unlock:
4018 mutex_unlock(&port->lock);
4019swap_unlock:
4020 mutex_unlock(&port->swap_lock);
4021 return ret;
4022}
4023
4024static int tcpm_pr_set(const struct typec_capability *cap,
4025 enum typec_role role)
4026{
4027 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4028 int ret;
4029
4030 mutex_lock(&port->swap_lock);
4031 mutex_lock(&port->lock);
4032
4033 if (port->port_type != TYPEC_PORT_DRP) {
4034 ret = -EINVAL;
4035 goto port_unlock;
4036 }
4037 if (port->state != SRC_READY && port->state != SNK_READY) {
4038 ret = -EAGAIN;
4039 goto port_unlock;
4040 }
4041
4042 if (role == port->pwr_role) {
4043 ret = 0;
4044 goto port_unlock;
4045 }
4046
4047 port->swap_status = 0;
4048 port->swap_pending = true;
4049 reinit_completion(&port->swap_complete);
4050 tcpm_set_state(port, PR_SWAP_SEND, 0);
4051 mutex_unlock(&port->lock);
4052
4053 if (!wait_for_completion_timeout(&port->swap_complete,
4054 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4055 ret = -ETIMEDOUT;
4056 else
4057 ret = port->swap_status;
4058
4059 goto swap_unlock;
4060
4061port_unlock:
4062 mutex_unlock(&port->lock);
4063swap_unlock:
4064 mutex_unlock(&port->swap_lock);
4065 return ret;
4066}
4067
4068static int tcpm_vconn_set(const struct typec_capability *cap,
4069 enum typec_role role)
4070{
4071 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4072 int ret;
4073
4074 mutex_lock(&port->swap_lock);
4075 mutex_lock(&port->lock);
4076
4077 if (port->state != SRC_READY && port->state != SNK_READY) {
4078 ret = -EAGAIN;
4079 goto port_unlock;
4080 }
4081
4082 if (role == port->vconn_role) {
4083 ret = 0;
4084 goto port_unlock;
4085 }
4086
4087 port->swap_status = 0;
4088 port->swap_pending = true;
4089 reinit_completion(&port->swap_complete);
4090 tcpm_set_state(port, VCONN_SWAP_SEND, 0);
4091 mutex_unlock(&port->lock);
4092
4093 if (!wait_for_completion_timeout(&port->swap_complete,
4094 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4095 ret = -ETIMEDOUT;
4096 else
4097 ret = port->swap_status;
4098
4099 goto swap_unlock;
4100
4101port_unlock:
4102 mutex_unlock(&port->lock);
4103swap_unlock:
4104 mutex_unlock(&port->swap_lock);
4105 return ret;
4106}
4107
4108static int tcpm_try_role(const struct typec_capability *cap, int role)
4109{
4110 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4111 struct tcpc_dev *tcpc = port->tcpc;
4112 int ret = 0;
4113
4114 mutex_lock(&port->lock);
4115 if (tcpc->try_role)
4116 ret = tcpc->try_role(tcpc, role);
4117 if (!ret && !tcpc->config->try_role_hw)
4118 port->try_role = role;
4119 port->try_src_count = 0;
4120 port->try_snk_count = 0;
4121 mutex_unlock(&port->lock);
4122
4123 return ret;
4124}
4125
4126static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr)
4127{
4128 unsigned int target_mw;
4129 int ret;
4130
4131 mutex_lock(&port->swap_lock);
4132 mutex_lock(&port->lock);
4133
4134 if (!port->pps_data.active) {
4135 ret = -EOPNOTSUPP;
4136 goto port_unlock;
4137 }
4138
4139 if (port->state != SNK_READY) {
4140 ret = -EAGAIN;
4141 goto port_unlock;
4142 }
4143
4144 if (op_curr > port->pps_data.max_curr) {
4145 ret = -EINVAL;
4146 goto port_unlock;
4147 }
4148
4149 target_mw = (op_curr * port->pps_data.out_volt) / 1000;
4150 if (target_mw < port->operating_snk_mw) {
4151 ret = -EINVAL;
4152 goto port_unlock;
4153 }
4154
4155
4156 op_curr = op_curr - (op_curr % RDO_PROG_CURR_MA_STEP);
4157
4158 reinit_completion(&port->pps_complete);
4159 port->pps_data.op_curr = op_curr;
4160 port->pps_status = 0;
4161 port->pps_pending = true;
4162 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4163 mutex_unlock(&port->lock);
4164
4165 if (!wait_for_completion_timeout(&port->pps_complete,
4166 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4167 ret = -ETIMEDOUT;
4168 else
4169 ret = port->pps_status;
4170
4171 goto swap_unlock;
4172
4173port_unlock:
4174 mutex_unlock(&port->lock);
4175swap_unlock:
4176 mutex_unlock(&port->swap_lock);
4177
4178 return ret;
4179}
4180
4181static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt)
4182{
4183 unsigned int target_mw;
4184 int ret;
4185
4186 mutex_lock(&port->swap_lock);
4187 mutex_lock(&port->lock);
4188
4189 if (!port->pps_data.active) {
4190 ret = -EOPNOTSUPP;
4191 goto port_unlock;
4192 }
4193
4194 if (port->state != SNK_READY) {
4195 ret = -EAGAIN;
4196 goto port_unlock;
4197 }
4198
4199 if (out_volt < port->pps_data.min_volt ||
4200 out_volt > port->pps_data.max_volt) {
4201 ret = -EINVAL;
4202 goto port_unlock;
4203 }
4204
4205 target_mw = (port->pps_data.op_curr * out_volt) / 1000;
4206 if (target_mw < port->operating_snk_mw) {
4207 ret = -EINVAL;
4208 goto port_unlock;
4209 }
4210
4211
4212 out_volt = out_volt - (out_volt % RDO_PROG_VOLT_MV_STEP);
4213
4214 reinit_completion(&port->pps_complete);
4215 port->pps_data.out_volt = out_volt;
4216 port->pps_status = 0;
4217 port->pps_pending = true;
4218 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4219 mutex_unlock(&port->lock);
4220
4221 if (!wait_for_completion_timeout(&port->pps_complete,
4222 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4223 ret = -ETIMEDOUT;
4224 else
4225 ret = port->pps_status;
4226
4227 goto swap_unlock;
4228
4229port_unlock:
4230 mutex_unlock(&port->lock);
4231swap_unlock:
4232 mutex_unlock(&port->swap_lock);
4233
4234 return ret;
4235}
4236
4237static int tcpm_pps_activate(struct tcpm_port *port, bool activate)
4238{
4239 int ret = 0;
4240
4241 mutex_lock(&port->swap_lock);
4242 mutex_lock(&port->lock);
4243
4244 if (!port->pps_data.supported) {
4245 ret = -EOPNOTSUPP;
4246 goto port_unlock;
4247 }
4248
4249
4250 if (!port->pps_data.active && !activate)
4251 goto port_unlock;
4252
4253 if (port->state != SNK_READY) {
4254 ret = -EAGAIN;
4255 goto port_unlock;
4256 }
4257
4258 reinit_completion(&port->pps_complete);
4259 port->pps_status = 0;
4260 port->pps_pending = true;
4261
4262
4263 if (activate) {
4264 port->pps_data.out_volt = port->supply_voltage;
4265 port->pps_data.op_curr = port->current_limit;
4266 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4267 } else {
4268 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
4269 }
4270 mutex_unlock(&port->lock);
4271
4272 if (!wait_for_completion_timeout(&port->pps_complete,
4273 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4274 ret = -ETIMEDOUT;
4275 else
4276 ret = port->pps_status;
4277
4278 goto swap_unlock;
4279
4280port_unlock:
4281 mutex_unlock(&port->lock);
4282swap_unlock:
4283 mutex_unlock(&port->swap_lock);
4284
4285 return ret;
4286}
4287
4288static void tcpm_init(struct tcpm_port *port)
4289{
4290 enum typec_cc_status cc1, cc2;
4291
4292 port->tcpc->init(port->tcpc);
4293
4294 tcpm_reset_port(port);
4295
4296
4297
4298
4299
4300
4301 port->vbus_present = port->tcpc->get_vbus(port->tcpc);
4302 if (port->vbus_present)
4303 port->vbus_never_low = true;
4304
4305 tcpm_set_state(port, tcpm_default_state(port), 0);
4306
4307 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
4308 _tcpm_cc_change(port, cc1, cc2);
4309
4310
4311
4312
4313
4314 tcpm_set_state(port, PORT_RESET, 0);
4315}
4316
4317static int tcpm_port_type_set(const struct typec_capability *cap,
4318 enum typec_port_type type)
4319{
4320 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4321
4322 mutex_lock(&port->lock);
4323 if (type == port->port_type)
4324 goto port_unlock;
4325
4326 port->port_type = type;
4327
4328 if (!port->connected) {
4329 tcpm_set_state(port, PORT_RESET, 0);
4330 } else if (type == TYPEC_PORT_SNK) {
4331 if (!(port->pwr_role == TYPEC_SINK &&
4332 port->data_role == TYPEC_DEVICE))
4333 tcpm_set_state(port, PORT_RESET, 0);
4334 } else if (type == TYPEC_PORT_SRC) {
4335 if (!(port->pwr_role == TYPEC_SOURCE &&
4336 port->data_role == TYPEC_HOST))
4337 tcpm_set_state(port, PORT_RESET, 0);
4338 }
4339
4340port_unlock:
4341 mutex_unlock(&port->lock);
4342 return 0;
4343}
4344
4345void tcpm_tcpc_reset(struct tcpm_port *port)
4346{
4347 mutex_lock(&port->lock);
4348
4349 tcpm_init(port);
4350 mutex_unlock(&port->lock);
4351}
4352EXPORT_SYMBOL_GPL(tcpm_tcpc_reset);
4353
4354static int tcpm_copy_pdos(u32 *dest_pdo, const u32 *src_pdo,
4355 unsigned int nr_pdo)
4356{
4357 unsigned int i;
4358
4359 if (nr_pdo > PDO_MAX_OBJECTS)
4360 nr_pdo = PDO_MAX_OBJECTS;
4361
4362 for (i = 0; i < nr_pdo; i++)
4363 dest_pdo[i] = src_pdo[i];
4364
4365 return nr_pdo;
4366}
4367
4368static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo,
4369 unsigned int nr_vdo)
4370{
4371 unsigned int i;
4372
4373 if (nr_vdo > VDO_MAX_OBJECTS)
4374 nr_vdo = VDO_MAX_OBJECTS;
4375
4376 for (i = 0; i < nr_vdo; i++)
4377 dest_vdo[i] = src_vdo[i];
4378
4379 return nr_vdo;
4380}
4381
4382static int tcpm_fw_get_caps(struct tcpm_port *port,
4383 struct fwnode_handle *fwnode)
4384{
4385 const char *cap_str;
4386 int ret;
4387 u32 mw;
4388
4389 if (!fwnode)
4390 return -EINVAL;
4391
4392
4393 ret = fwnode_property_read_string(fwnode, "data-role", &cap_str);
4394 if (ret == 0) {
4395 port->typec_caps.data = typec_find_port_data_role(cap_str);
4396 if (port->typec_caps.data < 0)
4397 return -EINVAL;
4398 }
4399
4400 ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
4401 if (ret < 0)
4402 return ret;
4403
4404 port->typec_caps.type = typec_find_port_power_role(cap_str);
4405 if (port->typec_caps.type < 0)
4406 return -EINVAL;
4407 port->port_type = port->typec_caps.type;
4408
4409 if (port->port_type == TYPEC_PORT_SNK)
4410 goto sink;
4411
4412
4413 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
4414 NULL, 0);
4415 if (ret <= 0)
4416 return -EINVAL;
4417
4418 port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
4419 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
4420 port->src_pdo, port->nr_src_pdo);
4421 if ((ret < 0) || tcpm_validate_caps(port, port->src_pdo,
4422 port->nr_src_pdo))
4423 return -EINVAL;
4424
4425 if (port->port_type == TYPEC_PORT_SRC)
4426 return 0;
4427
4428
4429 ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str);
4430 if (ret < 0)
4431 return ret;
4432
4433 port->typec_caps.prefer_role = typec_find_power_role(cap_str);
4434 if (port->typec_caps.prefer_role < 0)
4435 return -EINVAL;
4436sink:
4437
4438 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
4439 NULL, 0);
4440 if (ret <= 0)
4441 return -EINVAL;
4442
4443 port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS);
4444 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
4445 port->snk_pdo, port->nr_snk_pdo);
4446 if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo,
4447 port->nr_snk_pdo))
4448 return -EINVAL;
4449
4450 if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0)
4451 return -EINVAL;
4452 port->operating_snk_mw = mw / 1000;
4453
4454 port->self_powered = fwnode_property_read_bool(fwnode, "self-powered");
4455
4456 return 0;
4457}
4458
4459
4460enum tcpm_psy_online_states {
4461 TCPM_PSY_OFFLINE = 0,
4462 TCPM_PSY_FIXED_ONLINE,
4463 TCPM_PSY_PROG_ONLINE,
4464};
4465
4466static enum power_supply_property tcpm_psy_props[] = {
4467 POWER_SUPPLY_PROP_USB_TYPE,
4468 POWER_SUPPLY_PROP_ONLINE,
4469 POWER_SUPPLY_PROP_VOLTAGE_MIN,
4470 POWER_SUPPLY_PROP_VOLTAGE_MAX,
4471 POWER_SUPPLY_PROP_VOLTAGE_NOW,
4472 POWER_SUPPLY_PROP_CURRENT_MAX,
4473 POWER_SUPPLY_PROP_CURRENT_NOW,
4474};
4475
4476static int tcpm_psy_get_online(struct tcpm_port *port,
4477 union power_supply_propval *val)
4478{
4479 if (port->vbus_charge) {
4480 if (port->pps_data.active)
4481 val->intval = TCPM_PSY_PROG_ONLINE;
4482 else
4483 val->intval = TCPM_PSY_FIXED_ONLINE;
4484 } else {
4485 val->intval = TCPM_PSY_OFFLINE;
4486 }
4487
4488 return 0;
4489}
4490
4491static int tcpm_psy_get_voltage_min(struct tcpm_port *port,
4492 union power_supply_propval *val)
4493{
4494 if (port->pps_data.active)
4495 val->intval = port->pps_data.min_volt * 1000;
4496 else
4497 val->intval = port->supply_voltage * 1000;
4498
4499 return 0;
4500}
4501
4502static int tcpm_psy_get_voltage_max(struct tcpm_port *port,
4503 union power_supply_propval *val)
4504{
4505 if (port->pps_data.active)
4506 val->intval = port->pps_data.max_volt * 1000;
4507 else
4508 val->intval = port->supply_voltage * 1000;
4509
4510 return 0;
4511}
4512
4513static int tcpm_psy_get_voltage_now(struct tcpm_port *port,
4514 union power_supply_propval *val)
4515{
4516 val->intval = port->supply_voltage * 1000;
4517
4518 return 0;
4519}
4520
4521static int tcpm_psy_get_current_max(struct tcpm_port *port,
4522 union power_supply_propval *val)
4523{
4524 if (port->pps_data.active)
4525 val->intval = port->pps_data.max_curr * 1000;
4526 else
4527 val->intval = port->current_limit * 1000;
4528
4529 return 0;
4530}
4531
4532static int tcpm_psy_get_current_now(struct tcpm_port *port,
4533 union power_supply_propval *val)
4534{
4535 val->intval = port->current_limit * 1000;
4536
4537 return 0;
4538}
4539
4540static int tcpm_psy_get_prop(struct power_supply *psy,
4541 enum power_supply_property psp,
4542 union power_supply_propval *val)
4543{
4544 struct tcpm_port *port = power_supply_get_drvdata(psy);
4545 int ret = 0;
4546
4547 switch (psp) {
4548 case POWER_SUPPLY_PROP_USB_TYPE:
4549 val->intval = port->usb_type;
4550 break;
4551 case POWER_SUPPLY_PROP_ONLINE:
4552 ret = tcpm_psy_get_online(port, val);
4553 break;
4554 case POWER_SUPPLY_PROP_VOLTAGE_MIN:
4555 ret = tcpm_psy_get_voltage_min(port, val);
4556 break;
4557 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
4558 ret = tcpm_psy_get_voltage_max(port, val);
4559 break;
4560 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4561 ret = tcpm_psy_get_voltage_now(port, val);
4562 break;
4563 case POWER_SUPPLY_PROP_CURRENT_MAX:
4564 ret = tcpm_psy_get_current_max(port, val);
4565 break;
4566 case POWER_SUPPLY_PROP_CURRENT_NOW:
4567 ret = tcpm_psy_get_current_now(port, val);
4568 break;
4569 default:
4570 ret = -EINVAL;
4571 break;
4572 }
4573
4574 return ret;
4575}
4576
4577static int tcpm_psy_set_online(struct tcpm_port *port,
4578 const union power_supply_propval *val)
4579{
4580 int ret;
4581
4582 switch (val->intval) {
4583 case TCPM_PSY_FIXED_ONLINE:
4584 ret = tcpm_pps_activate(port, false);
4585 break;
4586 case TCPM_PSY_PROG_ONLINE:
4587 ret = tcpm_pps_activate(port, true);
4588 break;
4589 default:
4590 ret = -EINVAL;
4591 break;
4592 }
4593
4594 return ret;
4595}
4596
4597static int tcpm_psy_set_prop(struct power_supply *psy,
4598 enum power_supply_property psp,
4599 const union power_supply_propval *val)
4600{
4601 struct tcpm_port *port = power_supply_get_drvdata(psy);
4602 int ret;
4603
4604 switch (psp) {
4605 case POWER_SUPPLY_PROP_ONLINE:
4606 ret = tcpm_psy_set_online(port, val);
4607 break;
4608 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4609 if (val->intval < port->pps_data.min_volt * 1000 ||
4610 val->intval > port->pps_data.max_volt * 1000)
4611 ret = -EINVAL;
4612 else
4613 ret = tcpm_pps_set_out_volt(port, val->intval / 1000);
4614 break;
4615 case POWER_SUPPLY_PROP_CURRENT_NOW:
4616 if (val->intval > port->pps_data.max_curr * 1000)
4617 ret = -EINVAL;
4618 else
4619 ret = tcpm_pps_set_op_curr(port, val->intval / 1000);
4620 break;
4621 default:
4622 ret = -EINVAL;
4623 break;
4624 }
4625
4626 return ret;
4627}
4628
4629static int tcpm_psy_prop_writeable(struct power_supply *psy,
4630 enum power_supply_property psp)
4631{
4632 switch (psp) {
4633 case POWER_SUPPLY_PROP_ONLINE:
4634 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4635 case POWER_SUPPLY_PROP_CURRENT_NOW:
4636 return 1;
4637 default:
4638 return 0;
4639 }
4640}
4641
4642static enum power_supply_usb_type tcpm_psy_usb_types[] = {
4643 POWER_SUPPLY_USB_TYPE_C,
4644 POWER_SUPPLY_USB_TYPE_PD,
4645 POWER_SUPPLY_USB_TYPE_PD_PPS,
4646};
4647
4648static const char *tcpm_psy_name_prefix = "tcpm-source-psy-";
4649
4650static int devm_tcpm_psy_register(struct tcpm_port *port)
4651{
4652 struct power_supply_config psy_cfg = {};
4653 const char *port_dev_name = dev_name(port->dev);
4654 size_t psy_name_len = strlen(tcpm_psy_name_prefix) +
4655 strlen(port_dev_name) + 1;
4656 char *psy_name;
4657
4658 psy_cfg.drv_data = port;
4659 psy_cfg.fwnode = dev_fwnode(port->dev);
4660 psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL);
4661 if (!psy_name)
4662 return -ENOMEM;
4663
4664 snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix,
4665 port_dev_name);
4666 port->psy_desc.name = psy_name;
4667 port->psy_desc.type = POWER_SUPPLY_TYPE_USB,
4668 port->psy_desc.usb_types = tcpm_psy_usb_types;
4669 port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types);
4670 port->psy_desc.properties = tcpm_psy_props,
4671 port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props),
4672 port->psy_desc.get_property = tcpm_psy_get_prop,
4673 port->psy_desc.set_property = tcpm_psy_set_prop,
4674 port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable,
4675
4676 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
4677
4678 port->psy = devm_power_supply_register(port->dev, &port->psy_desc,
4679 &psy_cfg);
4680
4681 return PTR_ERR_OR_ZERO(port->psy);
4682}
4683
4684static int tcpm_copy_caps(struct tcpm_port *port,
4685 const struct tcpc_config *tcfg)
4686{
4687 if (tcpm_validate_caps(port, tcfg->src_pdo, tcfg->nr_src_pdo) ||
4688 tcpm_validate_caps(port, tcfg->snk_pdo, tcfg->nr_snk_pdo))
4689 return -EINVAL;
4690
4691 port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcfg->src_pdo,
4692 tcfg->nr_src_pdo);
4693 port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcfg->snk_pdo,
4694 tcfg->nr_snk_pdo);
4695
4696 port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcfg->snk_vdo,
4697 tcfg->nr_snk_vdo);
4698
4699 port->operating_snk_mw = tcfg->operating_snk_mw;
4700
4701 port->typec_caps.prefer_role = tcfg->default_role;
4702 port->typec_caps.type = tcfg->type;
4703 port->typec_caps.data = tcfg->data;
4704 port->self_powered = port->tcpc->config->self_powered;
4705
4706 return 0;
4707}
4708
4709struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
4710{
4711 struct tcpm_port *port;
4712 int i, err;
4713
4714 if (!dev || !tcpc ||
4715 !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc ||
4716 !tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus ||
4717 !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit)
4718 return ERR_PTR(-EINVAL);
4719
4720 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
4721 if (!port)
4722 return ERR_PTR(-ENOMEM);
4723
4724 port->dev = dev;
4725 port->tcpc = tcpc;
4726
4727 mutex_init(&port->lock);
4728 mutex_init(&port->swap_lock);
4729
4730 port->wq = create_singlethread_workqueue(dev_name(dev));
4731 if (!port->wq)
4732 return ERR_PTR(-ENOMEM);
4733 INIT_DELAYED_WORK(&port->state_machine, tcpm_state_machine_work);
4734 INIT_DELAYED_WORK(&port->vdm_state_machine, vdm_state_machine_work);
4735 INIT_WORK(&port->event_work, tcpm_pd_event_handler);
4736
4737 spin_lock_init(&port->pd_event_lock);
4738
4739 init_completion(&port->tx_complete);
4740 init_completion(&port->swap_complete);
4741 init_completion(&port->pps_complete);
4742 tcpm_debugfs_init(port);
4743
4744 err = tcpm_fw_get_caps(port, tcpc->fwnode);
4745 if ((err < 0) && tcpc->config)
4746 err = tcpm_copy_caps(port, tcpc->config);
4747 if (err < 0)
4748 goto out_destroy_wq;
4749
4750 if (!tcpc->config || !tcpc->config->try_role_hw)
4751 port->try_role = port->typec_caps.prefer_role;
4752 else
4753 port->try_role = TYPEC_NO_PREFERRED_ROLE;
4754
4755 port->typec_caps.fwnode = tcpc->fwnode;
4756 port->typec_caps.revision = 0x0120;
4757 port->typec_caps.pd_revision = 0x0300;
4758 port->typec_caps.dr_set = tcpm_dr_set;
4759 port->typec_caps.pr_set = tcpm_pr_set;
4760 port->typec_caps.vconn_set = tcpm_vconn_set;
4761 port->typec_caps.try_role = tcpm_try_role;
4762 port->typec_caps.port_type_set = tcpm_port_type_set;
4763
4764 port->partner_desc.identity = &port->partner_ident;
4765 port->port_type = port->typec_caps.type;
4766
4767 port->role_sw = usb_role_switch_get(port->dev);
4768 if (IS_ERR(port->role_sw)) {
4769 err = PTR_ERR(port->role_sw);
4770 goto out_destroy_wq;
4771 }
4772
4773 err = devm_tcpm_psy_register(port);
4774 if (err)
4775 goto out_role_sw_put;
4776
4777 port->typec_port = typec_register_port(port->dev, &port->typec_caps);
4778 if (IS_ERR(port->typec_port)) {
4779 err = PTR_ERR(port->typec_port);
4780 goto out_role_sw_put;
4781 }
4782
4783 if (tcpc->config && tcpc->config->alt_modes) {
4784 const struct typec_altmode_desc *paltmode = tcpc->config->alt_modes;
4785
4786 i = 0;
4787 while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) {
4788 struct typec_altmode *alt;
4789
4790 alt = typec_port_register_altmode(port->typec_port,
4791 paltmode);
4792 if (IS_ERR(alt)) {
4793 tcpm_log(port,
4794 "%s: failed to register port alternate mode 0x%x",
4795 dev_name(dev), paltmode->svid);
4796 break;
4797 }
4798 typec_altmode_set_drvdata(alt, port);
4799 alt->ops = &tcpm_altmode_ops;
4800 port->port_altmode[i] = alt;
4801 i++;
4802 paltmode++;
4803 }
4804 }
4805
4806 mutex_lock(&port->lock);
4807 tcpm_init(port);
4808 mutex_unlock(&port->lock);
4809
4810 tcpm_log(port, "%s: registered", dev_name(dev));
4811 return port;
4812
4813out_role_sw_put:
4814 usb_role_switch_put(port->role_sw);
4815out_destroy_wq:
4816 tcpm_debugfs_exit(port);
4817 destroy_workqueue(port->wq);
4818 return ERR_PTR(err);
4819}
4820EXPORT_SYMBOL_GPL(tcpm_register_port);
4821
4822void tcpm_unregister_port(struct tcpm_port *port)
4823{
4824 int i;
4825
4826 tcpm_reset_port(port);
4827 for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++)
4828 typec_unregister_altmode(port->port_altmode[i]);
4829 typec_unregister_port(port->typec_port);
4830 usb_role_switch_put(port->role_sw);
4831 tcpm_debugfs_exit(port);
4832 destroy_workqueue(port->wq);
4833}
4834EXPORT_SYMBOL_GPL(tcpm_unregister_port);
4835
4836MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>");
4837MODULE_DESCRIPTION("USB Type-C Port Manager");
4838MODULE_LICENSE("GPL");
4839