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7
8#include <linux/completion.h>
9#include <linux/debugfs.h>
10#include <linux/device.h>
11#include <linux/hrtimer.h>
12#include <linux/jiffies.h>
13#include <linux/kernel.h>
14#include <linux/kthread.h>
15#include <linux/module.h>
16#include <linux/mutex.h>
17#include <linux/power_supply.h>
18#include <linux/proc_fs.h>
19#include <linux/property.h>
20#include <linux/sched/clock.h>
21#include <linux/seq_file.h>
22#include <linux/slab.h>
23#include <linux/spinlock.h>
24#include <linux/usb.h>
25#include <linux/usb/pd.h>
26#include <linux/usb/pd_ado.h>
27#include <linux/usb/pd_bdo.h>
28#include <linux/usb/pd_ext_sdb.h>
29#include <linux/usb/pd_vdo.h>
30#include <linux/usb/role.h>
31#include <linux/usb/tcpm.h>
32#include <linux/usb/typec_altmode.h>
33
34#include <uapi/linux/sched/types.h>
35
36#define FOREACH_STATE(S) \
37 S(INVALID_STATE), \
38 S(TOGGLING), \
39 S(SRC_UNATTACHED), \
40 S(SRC_ATTACH_WAIT), \
41 S(SRC_ATTACHED), \
42 S(SRC_STARTUP), \
43 S(SRC_SEND_CAPABILITIES), \
44 S(SRC_SEND_CAPABILITIES_TIMEOUT), \
45 S(SRC_NEGOTIATE_CAPABILITIES), \
46 S(SRC_TRANSITION_SUPPLY), \
47 S(SRC_READY), \
48 S(SRC_WAIT_NEW_CAPABILITIES), \
49 \
50 S(SNK_UNATTACHED), \
51 S(SNK_ATTACH_WAIT), \
52 S(SNK_DEBOUNCED), \
53 S(SNK_ATTACHED), \
54 S(SNK_STARTUP), \
55 S(SNK_DISCOVERY), \
56 S(SNK_DISCOVERY_DEBOUNCE), \
57 S(SNK_DISCOVERY_DEBOUNCE_DONE), \
58 S(SNK_WAIT_CAPABILITIES), \
59 S(SNK_NEGOTIATE_CAPABILITIES), \
60 S(SNK_NEGOTIATE_PPS_CAPABILITIES), \
61 S(SNK_TRANSITION_SINK), \
62 S(SNK_TRANSITION_SINK_VBUS), \
63 S(SNK_READY), \
64 \
65 S(ACC_UNATTACHED), \
66 S(DEBUG_ACC_ATTACHED), \
67 S(AUDIO_ACC_ATTACHED), \
68 S(AUDIO_ACC_DEBOUNCE), \
69 \
70 S(HARD_RESET_SEND), \
71 S(HARD_RESET_START), \
72 S(SRC_HARD_RESET_VBUS_OFF), \
73 S(SRC_HARD_RESET_VBUS_ON), \
74 S(SNK_HARD_RESET_SINK_OFF), \
75 S(SNK_HARD_RESET_WAIT_VBUS), \
76 S(SNK_HARD_RESET_SINK_ON), \
77 \
78 S(SOFT_RESET), \
79 S(SRC_SOFT_RESET_WAIT_SNK_TX), \
80 S(SNK_SOFT_RESET), \
81 S(SOFT_RESET_SEND), \
82 \
83 S(DR_SWAP_ACCEPT), \
84 S(DR_SWAP_SEND), \
85 S(DR_SWAP_SEND_TIMEOUT), \
86 S(DR_SWAP_CANCEL), \
87 S(DR_SWAP_CHANGE_DR), \
88 \
89 S(PR_SWAP_ACCEPT), \
90 S(PR_SWAP_SEND), \
91 S(PR_SWAP_SEND_TIMEOUT), \
92 S(PR_SWAP_CANCEL), \
93 S(PR_SWAP_START), \
94 S(PR_SWAP_SRC_SNK_TRANSITION_OFF), \
95 S(PR_SWAP_SRC_SNK_SOURCE_OFF), \
96 S(PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED), \
97 S(PR_SWAP_SRC_SNK_SINK_ON), \
98 S(PR_SWAP_SNK_SRC_SINK_OFF), \
99 S(PR_SWAP_SNK_SRC_SOURCE_ON), \
100 S(PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP), \
101 \
102 S(VCONN_SWAP_ACCEPT), \
103 S(VCONN_SWAP_SEND), \
104 S(VCONN_SWAP_SEND_TIMEOUT), \
105 S(VCONN_SWAP_CANCEL), \
106 S(VCONN_SWAP_START), \
107 S(VCONN_SWAP_WAIT_FOR_VCONN), \
108 S(VCONN_SWAP_TURN_ON_VCONN), \
109 S(VCONN_SWAP_TURN_OFF_VCONN), \
110 \
111 S(FR_SWAP_SEND), \
112 S(FR_SWAP_SEND_TIMEOUT), \
113 S(FR_SWAP_SNK_SRC_TRANSITION_TO_OFF), \
114 S(FR_SWAP_SNK_SRC_NEW_SINK_READY), \
115 S(FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED), \
116 S(FR_SWAP_CANCEL), \
117 \
118 S(SNK_TRY), \
119 S(SNK_TRY_WAIT), \
120 S(SNK_TRY_WAIT_DEBOUNCE), \
121 S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \
122 S(SRC_TRYWAIT), \
123 S(SRC_TRYWAIT_DEBOUNCE), \
124 S(SRC_TRYWAIT_UNATTACHED), \
125 \
126 S(SRC_TRY), \
127 S(SRC_TRY_WAIT), \
128 S(SRC_TRY_DEBOUNCE), \
129 S(SNK_TRYWAIT), \
130 S(SNK_TRYWAIT_DEBOUNCE), \
131 S(SNK_TRYWAIT_VBUS), \
132 S(BIST_RX), \
133 \
134 S(GET_STATUS_SEND), \
135 S(GET_STATUS_SEND_TIMEOUT), \
136 S(GET_PPS_STATUS_SEND), \
137 S(GET_PPS_STATUS_SEND_TIMEOUT), \
138 \
139 S(GET_SINK_CAP), \
140 S(GET_SINK_CAP_TIMEOUT), \
141 \
142 S(ERROR_RECOVERY), \
143 S(PORT_RESET), \
144 S(PORT_RESET_WAIT_OFF), \
145 \
146 S(AMS_START), \
147 S(CHUNK_NOT_SUPP)
148
149#define FOREACH_AMS(S) \
150 S(NONE_AMS), \
151 S(POWER_NEGOTIATION), \
152 S(GOTOMIN), \
153 S(SOFT_RESET_AMS), \
154 S(HARD_RESET), \
155 S(CABLE_RESET), \
156 S(GET_SOURCE_CAPABILITIES), \
157 S(GET_SINK_CAPABILITIES), \
158 S(POWER_ROLE_SWAP), \
159 S(FAST_ROLE_SWAP), \
160 S(DATA_ROLE_SWAP), \
161 S(VCONN_SWAP), \
162 S(SOURCE_ALERT), \
163 S(GETTING_SOURCE_EXTENDED_CAPABILITIES),\
164 S(GETTING_SOURCE_SINK_STATUS), \
165 S(GETTING_BATTERY_CAPABILITIES), \
166 S(GETTING_BATTERY_STATUS), \
167 S(GETTING_MANUFACTURER_INFORMATION), \
168 S(SECURITY), \
169 S(FIRMWARE_UPDATE), \
170 S(DISCOVER_IDENTITY), \
171 S(SOURCE_STARTUP_CABLE_PLUG_DISCOVER_IDENTITY), \
172 S(DISCOVER_SVIDS), \
173 S(DISCOVER_MODES), \
174 S(DFP_TO_UFP_ENTER_MODE), \
175 S(DFP_TO_UFP_EXIT_MODE), \
176 S(DFP_TO_CABLE_PLUG_ENTER_MODE), \
177 S(DFP_TO_CABLE_PLUG_EXIT_MODE), \
178 S(ATTENTION), \
179 S(BIST), \
180 S(UNSTRUCTURED_VDMS), \
181 S(STRUCTURED_VDMS), \
182 S(COUNTRY_INFO), \
183 S(COUNTRY_CODES)
184
185#define GENERATE_ENUM(e) e
186#define GENERATE_STRING(s) #s
187
188enum tcpm_state {
189 FOREACH_STATE(GENERATE_ENUM)
190};
191
192static const char * const tcpm_states[] = {
193 FOREACH_STATE(GENERATE_STRING)
194};
195
196enum tcpm_ams {
197 FOREACH_AMS(GENERATE_ENUM)
198};
199
200static const char * const tcpm_ams_str[] = {
201 FOREACH_AMS(GENERATE_STRING)
202};
203
204enum vdm_states {
205 VDM_STATE_ERR_BUSY = -3,
206 VDM_STATE_ERR_SEND = -2,
207 VDM_STATE_ERR_TMOUT = -1,
208 VDM_STATE_DONE = 0,
209
210 VDM_STATE_READY = 1,
211 VDM_STATE_BUSY = 2,
212 VDM_STATE_WAIT_RSP_BUSY = 3,
213 VDM_STATE_SEND_MESSAGE = 4,
214};
215
216enum pd_msg_request {
217 PD_MSG_NONE = 0,
218 PD_MSG_CTRL_REJECT,
219 PD_MSG_CTRL_WAIT,
220 PD_MSG_CTRL_NOT_SUPP,
221 PD_MSG_DATA_SINK_CAP,
222 PD_MSG_DATA_SOURCE_CAP,
223};
224
225enum adev_actions {
226 ADEV_NONE = 0,
227 ADEV_NOTIFY_USB_AND_QUEUE_VDM,
228 ADEV_QUEUE_VDM,
229 ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL,
230 ADEV_ATTENTION,
231};
232
233
234
235
236
237
238enum frs_typec_current {
239 FRS_NOT_SUPPORTED,
240 FRS_DEFAULT_POWER,
241 FRS_5V_1P5A,
242 FRS_5V_3A,
243};
244
245
246
247#define TCPM_CC_EVENT BIT(0)
248#define TCPM_VBUS_EVENT BIT(1)
249#define TCPM_RESET_EVENT BIT(2)
250#define TCPM_FRS_EVENT BIT(3)
251#define TCPM_SOURCING_VBUS BIT(4)
252
253#define LOG_BUFFER_ENTRIES 1024
254#define LOG_BUFFER_ENTRY_SIZE 128
255
256
257
258#define SVID_DISCOVERY_MAX 16
259#define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX)
260
261#define GET_SINK_CAP_RETRY_MS 100
262#define SEND_DISCOVER_RETRY_MS 100
263
264struct pd_mode_data {
265 int svid_index;
266 int nsvids;
267 u16 svids[SVID_DISCOVERY_MAX];
268 int altmodes;
269 struct typec_altmode_desc altmode_desc[ALTMODE_DISCOVERY_MAX];
270};
271
272
273
274
275
276
277
278
279
280
281
282
283
284struct pd_pps_data {
285 u32 min_volt;
286 u32 req_min_volt;
287 u32 max_volt;
288 u32 req_max_volt;
289 u32 max_curr;
290 u32 req_max_curr;
291 u32 req_out_volt;
292 u32 req_op_curr;
293 bool supported;
294 bool active;
295};
296
297struct tcpm_port {
298 struct device *dev;
299
300 struct mutex lock;
301 struct kthread_worker *wq;
302
303 struct typec_capability typec_caps;
304 struct typec_port *typec_port;
305
306 struct tcpc_dev *tcpc;
307 struct usb_role_switch *role_sw;
308
309 enum typec_role vconn_role;
310 enum typec_role pwr_role;
311 enum typec_data_role data_role;
312 enum typec_pwr_opmode pwr_opmode;
313
314 struct usb_pd_identity partner_ident;
315 struct typec_partner_desc partner_desc;
316 struct typec_partner *partner;
317
318 enum typec_cc_status cc_req;
319 enum typec_cc_status src_rp;
320
321 enum typec_cc_status cc1;
322 enum typec_cc_status cc2;
323 enum typec_cc_polarity polarity;
324
325 bool attached;
326 bool connected;
327 bool pd_supported;
328 enum typec_port_type port_type;
329
330
331
332
333
334 bool vbus_present;
335
336
337
338
339
340 bool vbus_vsafe0v;
341
342 bool vbus_never_low;
343 bool vbus_source;
344 bool vbus_charge;
345
346
347 bool send_discover;
348 bool op_vsafe5v;
349
350 int try_role;
351 int try_snk_count;
352 int try_src_count;
353
354 enum pd_msg_request queued_message;
355
356 enum tcpm_state enter_state;
357 enum tcpm_state prev_state;
358 enum tcpm_state state;
359 enum tcpm_state delayed_state;
360 ktime_t delayed_runtime;
361 unsigned long delay_ms;
362
363 spinlock_t pd_event_lock;
364 u32 pd_events;
365
366 struct kthread_work event_work;
367 struct hrtimer state_machine_timer;
368 struct kthread_work state_machine;
369 struct hrtimer vdm_state_machine_timer;
370 struct kthread_work vdm_state_machine;
371 struct hrtimer enable_frs_timer;
372 struct kthread_work enable_frs;
373 struct hrtimer send_discover_timer;
374 struct kthread_work send_discover_work;
375 bool state_machine_running;
376
377 bool vdm_sm_running;
378
379 struct completion tx_complete;
380 enum tcpm_transmit_status tx_status;
381
382 struct mutex swap_lock;
383 bool swap_pending;
384 bool non_pd_role_swap;
385 struct completion swap_complete;
386 int swap_status;
387
388 unsigned int negotiated_rev;
389 unsigned int message_id;
390 unsigned int caps_count;
391 unsigned int hard_reset_count;
392 bool pd_capable;
393 bool explicit_contract;
394 unsigned int rx_msgid;
395
396
397 u32 sink_request;
398 u32 source_caps[PDO_MAX_OBJECTS];
399 unsigned int nr_source_caps;
400 u32 sink_caps[PDO_MAX_OBJECTS];
401 unsigned int nr_sink_caps;
402
403
404 u32 src_pdo[PDO_MAX_OBJECTS];
405 unsigned int nr_src_pdo;
406 u32 snk_pdo[PDO_MAX_OBJECTS];
407 unsigned int nr_snk_pdo;
408 u32 snk_vdo_v1[VDO_MAX_OBJECTS];
409 unsigned int nr_snk_vdo_v1;
410 u32 snk_vdo[VDO_MAX_OBJECTS];
411 unsigned int nr_snk_vdo;
412
413 unsigned int operating_snk_mw;
414 bool update_sink_caps;
415
416
417 u32 req_current_limit;
418 u32 req_supply_voltage;
419
420 u32 current_limit;
421 u32 supply_voltage;
422
423
424 struct power_supply *psy;
425 struct power_supply_desc psy_desc;
426 enum power_supply_usb_type usb_type;
427
428 u32 bist_request;
429
430
431 enum vdm_states vdm_state;
432 u32 vdm_retries;
433
434 u32 vdo_data[VDO_MAX_SIZE];
435 u8 vdo_count;
436
437 u32 vdo_retry;
438
439
440 struct pd_pps_data pps_data;
441 struct completion pps_complete;
442 bool pps_pending;
443 int pps_status;
444
445
446 struct pd_mode_data mode_data;
447 struct typec_altmode *partner_altmode[ALTMODE_DISCOVERY_MAX];
448 struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX];
449
450
451 unsigned long max_wait;
452
453
454 bool self_powered;
455
456
457 enum frs_typec_current new_source_frs_current;
458
459
460 bool sink_cap_done;
461
462
463 enum tcpm_state upcoming_state;
464 enum tcpm_ams ams;
465 enum tcpm_ams next_ams;
466 bool in_ams;
467
468
469 bool auto_vbus_discharge_enabled;
470
471
472
473
474
475
476 bool slow_charger_loop;
477#ifdef CONFIG_DEBUG_FS
478 struct dentry *dentry;
479 struct mutex logbuffer_lock;
480 int logbuffer_head;
481 int logbuffer_tail;
482 u8 *logbuffer[LOG_BUFFER_ENTRIES];
483#endif
484};
485
486struct pd_rx_event {
487 struct kthread_work work;
488 struct tcpm_port *port;
489 struct pd_message msg;
490};
491
492static const char * const pd_rev[] = {
493 [PD_REV10] = "rev1",
494 [PD_REV20] = "rev2",
495 [PD_REV30] = "rev3",
496};
497
498#define tcpm_cc_is_sink(cc) \
499 ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \
500 (cc) == TYPEC_CC_RP_3_0)
501
502#define tcpm_port_is_sink(port) \
503 ((tcpm_cc_is_sink((port)->cc1) && !tcpm_cc_is_sink((port)->cc2)) || \
504 (tcpm_cc_is_sink((port)->cc2) && !tcpm_cc_is_sink((port)->cc1)))
505
506#define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD)
507#define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA)
508#define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN)
509
510#define tcpm_port_is_source(port) \
511 ((tcpm_cc_is_source((port)->cc1) && \
512 !tcpm_cc_is_source((port)->cc2)) || \
513 (tcpm_cc_is_source((port)->cc2) && \
514 !tcpm_cc_is_source((port)->cc1)))
515
516#define tcpm_port_is_debug(port) \
517 (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2))
518
519#define tcpm_port_is_audio(port) \
520 (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2))
521
522#define tcpm_port_is_audio_detached(port) \
523 ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \
524 (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1)))
525
526#define tcpm_try_snk(port) \
527 ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \
528 (port)->port_type == TYPEC_PORT_DRP)
529
530#define tcpm_try_src(port) \
531 ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \
532 (port)->port_type == TYPEC_PORT_DRP)
533
534#define tcpm_data_role_for_source(port) \
535 ((port)->typec_caps.data == TYPEC_PORT_UFP ? \
536 TYPEC_DEVICE : TYPEC_HOST)
537
538#define tcpm_data_role_for_sink(port) \
539 ((port)->typec_caps.data == TYPEC_PORT_DFP ? \
540 TYPEC_HOST : TYPEC_DEVICE)
541
542#define tcpm_sink_tx_ok(port) \
543 (tcpm_port_is_sink(port) && \
544 ((port)->cc1 == TYPEC_CC_RP_3_0 || (port)->cc2 == TYPEC_CC_RP_3_0))
545
546#define tcpm_wait_for_discharge(port) \
547 (((port)->auto_vbus_discharge_enabled && !(port)->vbus_vsafe0v) ? PD_T_SAFE_0V : 0)
548
549static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
550{
551 if (port->port_type == TYPEC_PORT_DRP) {
552 if (port->try_role == TYPEC_SINK)
553 return SNK_UNATTACHED;
554 else if (port->try_role == TYPEC_SOURCE)
555 return SRC_UNATTACHED;
556
557 } else if (port->port_type == TYPEC_PORT_SNK) {
558 return SNK_UNATTACHED;
559 }
560 return SRC_UNATTACHED;
561}
562
563static bool tcpm_port_is_disconnected(struct tcpm_port *port)
564{
565 return (!port->attached && port->cc1 == TYPEC_CC_OPEN &&
566 port->cc2 == TYPEC_CC_OPEN) ||
567 (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 &&
568 port->cc1 == TYPEC_CC_OPEN) ||
569 (port->polarity == TYPEC_POLARITY_CC2 &&
570 port->cc2 == TYPEC_CC_OPEN)));
571}
572
573
574
575
576
577#ifdef CONFIG_DEBUG_FS
578
579static bool tcpm_log_full(struct tcpm_port *port)
580{
581 return port->logbuffer_tail ==
582 (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
583}
584
585__printf(2, 0)
586static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args)
587{
588 char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
589 u64 ts_nsec = local_clock();
590 unsigned long rem_nsec;
591
592 mutex_lock(&port->logbuffer_lock);
593 if (!port->logbuffer[port->logbuffer_head]) {
594 port->logbuffer[port->logbuffer_head] =
595 kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
596 if (!port->logbuffer[port->logbuffer_head]) {
597 mutex_unlock(&port->logbuffer_lock);
598 return;
599 }
600 }
601
602 vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
603
604 if (tcpm_log_full(port)) {
605 port->logbuffer_head = max(port->logbuffer_head - 1, 0);
606 strcpy(tmpbuffer, "overflow");
607 }
608
609 if (port->logbuffer_head < 0 ||
610 port->logbuffer_head >= LOG_BUFFER_ENTRIES) {
611 dev_warn(port->dev,
612 "Bad log buffer index %d\n", port->logbuffer_head);
613 goto abort;
614 }
615
616 if (!port->logbuffer[port->logbuffer_head]) {
617 dev_warn(port->dev,
618 "Log buffer index %d is NULL\n", port->logbuffer_head);
619 goto abort;
620 }
621
622 rem_nsec = do_div(ts_nsec, 1000000000);
623 scnprintf(port->logbuffer[port->logbuffer_head],
624 LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
625 (unsigned long)ts_nsec, rem_nsec / 1000,
626 tmpbuffer);
627 port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
628
629abort:
630 mutex_unlock(&port->logbuffer_lock);
631}
632
633__printf(2, 3)
634static void tcpm_log(struct tcpm_port *port, const char *fmt, ...)
635{
636 va_list args;
637
638
639 if (tcpm_port_is_disconnected(port) &&
640 (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED ||
641 port->state == TOGGLING))
642 return;
643
644 va_start(args, fmt);
645 _tcpm_log(port, fmt, args);
646 va_end(args);
647}
648
649__printf(2, 3)
650static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...)
651{
652 va_list args;
653
654 va_start(args, fmt);
655 _tcpm_log(port, fmt, args);
656 va_end(args);
657}
658
659static void tcpm_log_source_caps(struct tcpm_port *port)
660{
661 int i;
662
663 for (i = 0; i < port->nr_source_caps; i++) {
664 u32 pdo = port->source_caps[i];
665 enum pd_pdo_type type = pdo_type(pdo);
666 char msg[64];
667
668 switch (type) {
669 case PDO_TYPE_FIXED:
670 scnprintf(msg, sizeof(msg),
671 "%u mV, %u mA [%s%s%s%s%s%s]",
672 pdo_fixed_voltage(pdo),
673 pdo_max_current(pdo),
674 (pdo & PDO_FIXED_DUAL_ROLE) ?
675 "R" : "",
676 (pdo & PDO_FIXED_SUSPEND) ?
677 "S" : "",
678 (pdo & PDO_FIXED_HIGHER_CAP) ?
679 "H" : "",
680 (pdo & PDO_FIXED_USB_COMM) ?
681 "U" : "",
682 (pdo & PDO_FIXED_DATA_SWAP) ?
683 "D" : "",
684 (pdo & PDO_FIXED_EXTPOWER) ?
685 "E" : "");
686 break;
687 case PDO_TYPE_VAR:
688 scnprintf(msg, sizeof(msg),
689 "%u-%u mV, %u mA",
690 pdo_min_voltage(pdo),
691 pdo_max_voltage(pdo),
692 pdo_max_current(pdo));
693 break;
694 case PDO_TYPE_BATT:
695 scnprintf(msg, sizeof(msg),
696 "%u-%u mV, %u mW",
697 pdo_min_voltage(pdo),
698 pdo_max_voltage(pdo),
699 pdo_max_power(pdo));
700 break;
701 case PDO_TYPE_APDO:
702 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS)
703 scnprintf(msg, sizeof(msg),
704 "%u-%u mV, %u mA",
705 pdo_pps_apdo_min_voltage(pdo),
706 pdo_pps_apdo_max_voltage(pdo),
707 pdo_pps_apdo_max_current(pdo));
708 else
709 strcpy(msg, "undefined APDO");
710 break;
711 default:
712 strcpy(msg, "undefined");
713 break;
714 }
715 tcpm_log(port, " PDO %d: type %d, %s",
716 i, type, msg);
717 }
718}
719
720static int tcpm_debug_show(struct seq_file *s, void *v)
721{
722 struct tcpm_port *port = (struct tcpm_port *)s->private;
723 int tail;
724
725 mutex_lock(&port->logbuffer_lock);
726 tail = port->logbuffer_tail;
727 while (tail != port->logbuffer_head) {
728 seq_printf(s, "%s\n", port->logbuffer[tail]);
729 tail = (tail + 1) % LOG_BUFFER_ENTRIES;
730 }
731 if (!seq_has_overflowed(s))
732 port->logbuffer_tail = tail;
733 mutex_unlock(&port->logbuffer_lock);
734
735 return 0;
736}
737DEFINE_SHOW_ATTRIBUTE(tcpm_debug);
738
739static void tcpm_debugfs_init(struct tcpm_port *port)
740{
741 char name[NAME_MAX];
742
743 mutex_init(&port->logbuffer_lock);
744 snprintf(name, NAME_MAX, "tcpm-%s", dev_name(port->dev));
745 port->dentry = debugfs_create_dir(name, usb_debug_root);
746 debugfs_create_file("log", S_IFREG | 0444, port->dentry, port,
747 &tcpm_debug_fops);
748}
749
750static void tcpm_debugfs_exit(struct tcpm_port *port)
751{
752 int i;
753
754 mutex_lock(&port->logbuffer_lock);
755 for (i = 0; i < LOG_BUFFER_ENTRIES; i++) {
756 kfree(port->logbuffer[i]);
757 port->logbuffer[i] = NULL;
758 }
759 mutex_unlock(&port->logbuffer_lock);
760
761 debugfs_remove(port->dentry);
762}
763
764#else
765
766__printf(2, 3)
767static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { }
768__printf(2, 3)
769static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { }
770static void tcpm_log_source_caps(struct tcpm_port *port) { }
771static void tcpm_debugfs_init(const struct tcpm_port *port) { }
772static void tcpm_debugfs_exit(const struct tcpm_port *port) { }
773
774#endif
775
776static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc)
777{
778 tcpm_log(port, "cc:=%d", cc);
779 port->cc_req = cc;
780 port->tcpc->set_cc(port->tcpc, cc);
781}
782
783static int tcpm_enable_auto_vbus_discharge(struct tcpm_port *port, bool enable)
784{
785 int ret = 0;
786
787 if (port->tcpc->enable_auto_vbus_discharge) {
788 ret = port->tcpc->enable_auto_vbus_discharge(port->tcpc, enable);
789 tcpm_log_force(port, "%s vbus discharge ret:%d", enable ? "enable" : "disable",
790 ret);
791 if (!ret)
792 port->auto_vbus_discharge_enabled = enable;
793 }
794
795 return ret;
796}
797
798static void tcpm_apply_rc(struct tcpm_port *port)
799{
800
801
802
803
804 if (port->tcpc->enable_auto_vbus_discharge && port->tcpc->apply_rc) {
805 tcpm_log(port, "Apply_RC");
806 port->tcpc->apply_rc(port->tcpc, port->cc_req, port->polarity);
807 tcpm_enable_auto_vbus_discharge(port, false);
808 }
809}
810
811
812
813
814
815
816static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port)
817{
818 const u32 *src_pdo = port->src_pdo;
819 int nr_pdo = port->nr_src_pdo;
820 int i;
821
822 if (!port->pd_supported)
823 return port->src_rp;
824
825
826
827
828
829 for (i = 0; i < nr_pdo; i++) {
830 const u32 pdo = src_pdo[i];
831
832 if (pdo_type(pdo) == PDO_TYPE_FIXED &&
833 pdo_fixed_voltage(pdo) == 5000) {
834 unsigned int curr = pdo_max_current(pdo);
835
836 if (curr >= 3000)
837 return TYPEC_CC_RP_3_0;
838 else if (curr >= 1500)
839 return TYPEC_CC_RP_1_5;
840 return TYPEC_CC_RP_DEF;
841 }
842 }
843
844 return TYPEC_CC_RP_DEF;
845}
846
847static void tcpm_ams_finish(struct tcpm_port *port)
848{
849 tcpm_log(port, "AMS %s finished", tcpm_ams_str[port->ams]);
850
851 if (port->pd_capable && port->pwr_role == TYPEC_SOURCE) {
852 if (port->negotiated_rev >= PD_REV30)
853 tcpm_set_cc(port, SINK_TX_OK);
854 else
855 tcpm_set_cc(port, SINK_TX_NG);
856 } else if (port->pwr_role == TYPEC_SOURCE) {
857 tcpm_set_cc(port, tcpm_rp_cc(port));
858 }
859
860 port->in_ams = false;
861 port->ams = NONE_AMS;
862}
863
864static int tcpm_pd_transmit(struct tcpm_port *port,
865 enum tcpm_transmit_type type,
866 const struct pd_message *msg)
867{
868 unsigned long timeout;
869 int ret;
870
871 if (msg)
872 tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header));
873 else
874 tcpm_log(port, "PD TX, type: %#x", type);
875
876 reinit_completion(&port->tx_complete);
877 ret = port->tcpc->pd_transmit(port->tcpc, type, msg, port->negotiated_rev);
878 if (ret < 0)
879 return ret;
880
881 mutex_unlock(&port->lock);
882 timeout = wait_for_completion_timeout(&port->tx_complete,
883 msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT));
884 mutex_lock(&port->lock);
885 if (!timeout)
886 return -ETIMEDOUT;
887
888 switch (port->tx_status) {
889 case TCPC_TX_SUCCESS:
890 port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK;
891
892
893
894
895
896
897
898 if (port->ams != NONE_AMS)
899 port->in_ams = true;
900 break;
901 case TCPC_TX_DISCARDED:
902 ret = -EAGAIN;
903 break;
904 case TCPC_TX_FAILED:
905 default:
906 ret = -EIO;
907 break;
908 }
909
910
911 if (port->ams == ATTENTION || port->ams == SOURCE_ALERT)
912 tcpm_ams_finish(port);
913
914 return ret;
915}
916
917void tcpm_pd_transmit_complete(struct tcpm_port *port,
918 enum tcpm_transmit_status status)
919{
920 tcpm_log(port, "PD TX complete, status: %u", status);
921 port->tx_status = status;
922 complete(&port->tx_complete);
923}
924EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete);
925
926static int tcpm_mux_set(struct tcpm_port *port, int state,
927 enum usb_role usb_role,
928 enum typec_orientation orientation)
929{
930 int ret;
931
932 tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d",
933 state, usb_role, orientation);
934
935 ret = typec_set_orientation(port->typec_port, orientation);
936 if (ret)
937 return ret;
938
939 if (port->role_sw) {
940 ret = usb_role_switch_set_role(port->role_sw, usb_role);
941 if (ret)
942 return ret;
943 }
944
945 return typec_set_mode(port->typec_port, state);
946}
947
948static int tcpm_set_polarity(struct tcpm_port *port,
949 enum typec_cc_polarity polarity)
950{
951 int ret;
952
953 tcpm_log(port, "polarity %d", polarity);
954
955 ret = port->tcpc->set_polarity(port->tcpc, polarity);
956 if (ret < 0)
957 return ret;
958
959 port->polarity = polarity;
960
961 return 0;
962}
963
964static int tcpm_set_vconn(struct tcpm_port *port, bool enable)
965{
966 int ret;
967
968 tcpm_log(port, "vconn:=%d", enable);
969
970 ret = port->tcpc->set_vconn(port->tcpc, enable);
971 if (!ret) {
972 port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK;
973 typec_set_vconn_role(port->typec_port, port->vconn_role);
974 }
975
976 return ret;
977}
978
979static u32 tcpm_get_current_limit(struct tcpm_port *port)
980{
981 enum typec_cc_status cc;
982 u32 limit;
983
984 cc = port->polarity ? port->cc2 : port->cc1;
985 switch (cc) {
986 case TYPEC_CC_RP_1_5:
987 limit = 1500;
988 break;
989 case TYPEC_CC_RP_3_0:
990 limit = 3000;
991 break;
992 case TYPEC_CC_RP_DEF:
993 default:
994 if (port->tcpc->get_current_limit)
995 limit = port->tcpc->get_current_limit(port->tcpc);
996 else
997 limit = 0;
998 break;
999 }
1000
1001 return limit;
1002}
1003
1004static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv)
1005{
1006 int ret = -EOPNOTSUPP;
1007
1008 tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma);
1009
1010 port->supply_voltage = mv;
1011 port->current_limit = max_ma;
1012 power_supply_changed(port->psy);
1013
1014 if (port->tcpc->set_current_limit)
1015 ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv);
1016
1017 return ret;
1018}
1019
1020static int tcpm_set_attached_state(struct tcpm_port *port, bool attached)
1021{
1022 return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role,
1023 port->data_role);
1024}
1025
1026static int tcpm_set_roles(struct tcpm_port *port, bool attached,
1027 enum typec_role role, enum typec_data_role data)
1028{
1029 enum typec_orientation orientation;
1030 enum usb_role usb_role;
1031 int ret;
1032
1033 if (port->polarity == TYPEC_POLARITY_CC1)
1034 orientation = TYPEC_ORIENTATION_NORMAL;
1035 else
1036 orientation = TYPEC_ORIENTATION_REVERSE;
1037
1038 if (port->typec_caps.data == TYPEC_PORT_DRD) {
1039 if (data == TYPEC_HOST)
1040 usb_role = USB_ROLE_HOST;
1041 else
1042 usb_role = USB_ROLE_DEVICE;
1043 } else if (port->typec_caps.data == TYPEC_PORT_DFP) {
1044 if (data == TYPEC_HOST) {
1045 if (role == TYPEC_SOURCE)
1046 usb_role = USB_ROLE_HOST;
1047 else
1048 usb_role = USB_ROLE_NONE;
1049 } else {
1050 return -ENOTSUPP;
1051 }
1052 } else {
1053 if (data == TYPEC_DEVICE) {
1054 if (role == TYPEC_SINK)
1055 usb_role = USB_ROLE_DEVICE;
1056 else
1057 usb_role = USB_ROLE_NONE;
1058 } else {
1059 return -ENOTSUPP;
1060 }
1061 }
1062
1063 ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation);
1064 if (ret < 0)
1065 return ret;
1066
1067 ret = port->tcpc->set_roles(port->tcpc, attached, role, data);
1068 if (ret < 0)
1069 return ret;
1070
1071 port->pwr_role = role;
1072 port->data_role = data;
1073 typec_set_data_role(port->typec_port, data);
1074 typec_set_pwr_role(port->typec_port, role);
1075
1076 return 0;
1077}
1078
1079static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role)
1080{
1081 int ret;
1082
1083 ret = port->tcpc->set_roles(port->tcpc, true, role,
1084 port->data_role);
1085 if (ret < 0)
1086 return ret;
1087
1088 port->pwr_role = role;
1089 typec_set_pwr_role(port->typec_port, role);
1090
1091 return 0;
1092}
1093
1094
1095
1096
1097
1098
1099static u32 tcpm_forge_legacy_pdo(struct tcpm_port *port, u32 pdo, enum typec_role role)
1100{
1101 switch (pdo_type(pdo)) {
1102 case PDO_TYPE_FIXED:
1103 if (role == TYPEC_SINK)
1104 return pdo & ~PDO_FIXED_FRS_CURR_MASK;
1105 else
1106 return pdo & ~PDO_FIXED_UNCHUNK_EXT;
1107 case PDO_TYPE_VAR:
1108 case PDO_TYPE_BATT:
1109 return pdo;
1110 case PDO_TYPE_APDO:
1111 default:
1112 return 0;
1113 }
1114}
1115
1116static int tcpm_pd_send_source_caps(struct tcpm_port *port)
1117{
1118 struct pd_message msg;
1119 u32 pdo;
1120 unsigned int i, nr_pdo = 0;
1121
1122 memset(&msg, 0, sizeof(msg));
1123
1124 for (i = 0; i < port->nr_src_pdo; i++) {
1125 if (port->negotiated_rev >= PD_REV30) {
1126 msg.payload[nr_pdo++] = cpu_to_le32(port->src_pdo[i]);
1127 } else {
1128 pdo = tcpm_forge_legacy_pdo(port, port->src_pdo[i], TYPEC_SOURCE);
1129 if (pdo)
1130 msg.payload[nr_pdo++] = cpu_to_le32(pdo);
1131 }
1132 }
1133
1134 if (!nr_pdo) {
1135
1136 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
1137 port->pwr_role,
1138 port->data_role,
1139 port->negotiated_rev,
1140 port->message_id, 0);
1141 } else {
1142 msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP,
1143 port->pwr_role,
1144 port->data_role,
1145 port->negotiated_rev,
1146 port->message_id,
1147 nr_pdo);
1148 }
1149
1150 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
1151}
1152
1153static int tcpm_pd_send_sink_caps(struct tcpm_port *port)
1154{
1155 struct pd_message msg;
1156 u32 pdo;
1157 unsigned int i, nr_pdo = 0;
1158
1159 memset(&msg, 0, sizeof(msg));
1160
1161 for (i = 0; i < port->nr_snk_pdo; i++) {
1162 if (port->negotiated_rev >= PD_REV30) {
1163 msg.payload[nr_pdo++] = cpu_to_le32(port->snk_pdo[i]);
1164 } else {
1165 pdo = tcpm_forge_legacy_pdo(port, port->snk_pdo[i], TYPEC_SINK);
1166 if (pdo)
1167 msg.payload[nr_pdo++] = cpu_to_le32(pdo);
1168 }
1169 }
1170
1171 if (!nr_pdo) {
1172
1173 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
1174 port->pwr_role,
1175 port->data_role,
1176 port->negotiated_rev,
1177 port->message_id, 0);
1178 } else {
1179 msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP,
1180 port->pwr_role,
1181 port->data_role,
1182 port->negotiated_rev,
1183 port->message_id,
1184 nr_pdo);
1185 }
1186
1187 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
1188}
1189
1190static void mod_tcpm_delayed_work(struct tcpm_port *port, unsigned int delay_ms)
1191{
1192 if (delay_ms) {
1193 hrtimer_start(&port->state_machine_timer, ms_to_ktime(delay_ms), HRTIMER_MODE_REL);
1194 } else {
1195 hrtimer_cancel(&port->state_machine_timer);
1196 kthread_queue_work(port->wq, &port->state_machine);
1197 }
1198}
1199
1200static void mod_vdm_delayed_work(struct tcpm_port *port, unsigned int delay_ms)
1201{
1202 if (delay_ms) {
1203 hrtimer_start(&port->vdm_state_machine_timer, ms_to_ktime(delay_ms),
1204 HRTIMER_MODE_REL);
1205 } else {
1206 hrtimer_cancel(&port->vdm_state_machine_timer);
1207 kthread_queue_work(port->wq, &port->vdm_state_machine);
1208 }
1209}
1210
1211static void mod_enable_frs_delayed_work(struct tcpm_port *port, unsigned int delay_ms)
1212{
1213 if (delay_ms) {
1214 hrtimer_start(&port->enable_frs_timer, ms_to_ktime(delay_ms), HRTIMER_MODE_REL);
1215 } else {
1216 hrtimer_cancel(&port->enable_frs_timer);
1217 kthread_queue_work(port->wq, &port->enable_frs);
1218 }
1219}
1220
1221static void mod_send_discover_delayed_work(struct tcpm_port *port, unsigned int delay_ms)
1222{
1223 if (delay_ms) {
1224 hrtimer_start(&port->send_discover_timer, ms_to_ktime(delay_ms), HRTIMER_MODE_REL);
1225 } else {
1226 hrtimer_cancel(&port->send_discover_timer);
1227 kthread_queue_work(port->wq, &port->send_discover_work);
1228 }
1229}
1230
1231static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state,
1232 unsigned int delay_ms)
1233{
1234 if (delay_ms) {
1235 tcpm_log(port, "pending state change %s -> %s @ %u ms [%s %s]",
1236 tcpm_states[port->state], tcpm_states[state], delay_ms,
1237 pd_rev[port->negotiated_rev], tcpm_ams_str[port->ams]);
1238 port->delayed_state = state;
1239 mod_tcpm_delayed_work(port, delay_ms);
1240 port->delayed_runtime = ktime_add(ktime_get(), ms_to_ktime(delay_ms));
1241 port->delay_ms = delay_ms;
1242 } else {
1243 tcpm_log(port, "state change %s -> %s [%s %s]",
1244 tcpm_states[port->state], tcpm_states[state],
1245 pd_rev[port->negotiated_rev], tcpm_ams_str[port->ams]);
1246 port->delayed_state = INVALID_STATE;
1247 port->prev_state = port->state;
1248 port->state = state;
1249
1250
1251
1252
1253
1254
1255 if (!port->state_machine_running)
1256 mod_tcpm_delayed_work(port, 0);
1257 }
1258}
1259
1260static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state,
1261 unsigned int delay_ms)
1262{
1263 if (port->enter_state == port->state)
1264 tcpm_set_state(port, state, delay_ms);
1265 else
1266 tcpm_log(port,
1267 "skipped %sstate change %s -> %s [%u ms], context state %s [%s %s]",
1268 delay_ms ? "delayed " : "",
1269 tcpm_states[port->state], tcpm_states[state],
1270 delay_ms, tcpm_states[port->enter_state],
1271 pd_rev[port->negotiated_rev], tcpm_ams_str[port->ams]);
1272}
1273
1274static void tcpm_queue_message(struct tcpm_port *port,
1275 enum pd_msg_request message)
1276{
1277 port->queued_message = message;
1278 mod_tcpm_delayed_work(port, 0);
1279}
1280
1281static bool tcpm_vdm_ams(struct tcpm_port *port)
1282{
1283 switch (port->ams) {
1284 case DISCOVER_IDENTITY:
1285 case SOURCE_STARTUP_CABLE_PLUG_DISCOVER_IDENTITY:
1286 case DISCOVER_SVIDS:
1287 case DISCOVER_MODES:
1288 case DFP_TO_UFP_ENTER_MODE:
1289 case DFP_TO_UFP_EXIT_MODE:
1290 case DFP_TO_CABLE_PLUG_ENTER_MODE:
1291 case DFP_TO_CABLE_PLUG_EXIT_MODE:
1292 case ATTENTION:
1293 case UNSTRUCTURED_VDMS:
1294 case STRUCTURED_VDMS:
1295 break;
1296 default:
1297 return false;
1298 }
1299
1300 return true;
1301}
1302
1303static bool tcpm_ams_interruptible(struct tcpm_port *port)
1304{
1305 switch (port->ams) {
1306
1307 case NONE_AMS:
1308 case SECURITY:
1309 case FIRMWARE_UPDATE:
1310 case DISCOVER_IDENTITY:
1311 case SOURCE_STARTUP_CABLE_PLUG_DISCOVER_IDENTITY:
1312 case DISCOVER_SVIDS:
1313 case DISCOVER_MODES:
1314 case DFP_TO_UFP_ENTER_MODE:
1315 case DFP_TO_UFP_EXIT_MODE:
1316 case DFP_TO_CABLE_PLUG_ENTER_MODE:
1317 case DFP_TO_CABLE_PLUG_EXIT_MODE:
1318 case UNSTRUCTURED_VDMS:
1319 case STRUCTURED_VDMS:
1320 case COUNTRY_INFO:
1321 case COUNTRY_CODES:
1322 break;
1323
1324 default:
1325 if (port->in_ams)
1326 return false;
1327 break;
1328 }
1329
1330 return true;
1331}
1332
1333static int tcpm_ams_start(struct tcpm_port *port, enum tcpm_ams ams)
1334{
1335 int ret = 0;
1336
1337 tcpm_log(port, "AMS %s start", tcpm_ams_str[ams]);
1338
1339 if (!tcpm_ams_interruptible(port) &&
1340 !(ams == HARD_RESET || ams == SOFT_RESET_AMS)) {
1341 port->upcoming_state = INVALID_STATE;
1342 tcpm_log(port, "AMS %s not interruptible, aborting",
1343 tcpm_ams_str[port->ams]);
1344 return -EAGAIN;
1345 }
1346
1347 if (port->pwr_role == TYPEC_SOURCE) {
1348 enum typec_cc_status cc_req = port->cc_req;
1349
1350 port->ams = ams;
1351
1352 if (ams == HARD_RESET) {
1353 tcpm_set_cc(port, tcpm_rp_cc(port));
1354 tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL);
1355 tcpm_set_state(port, HARD_RESET_START, 0);
1356 return ret;
1357 } else if (ams == SOFT_RESET_AMS) {
1358 if (!port->explicit_contract)
1359 tcpm_set_cc(port, tcpm_rp_cc(port));
1360 tcpm_set_state(port, SOFT_RESET_SEND, 0);
1361 return ret;
1362 } else if (tcpm_vdm_ams(port)) {
1363
1364 if (port->negotiated_rev >= PD_REV30)
1365 tcpm_set_cc(port, SINK_TX_NG);
1366 return ret;
1367 }
1368
1369 if (port->negotiated_rev >= PD_REV30)
1370 tcpm_set_cc(port, SINK_TX_NG);
1371
1372 switch (port->state) {
1373 case SRC_READY:
1374 case SRC_STARTUP:
1375 case SRC_SOFT_RESET_WAIT_SNK_TX:
1376 case SOFT_RESET:
1377 case SOFT_RESET_SEND:
1378 if (port->negotiated_rev >= PD_REV30)
1379 tcpm_set_state(port, AMS_START,
1380 cc_req == SINK_TX_OK ?
1381 PD_T_SINK_TX : 0);
1382 else
1383 tcpm_set_state(port, AMS_START, 0);
1384 break;
1385 default:
1386 if (port->negotiated_rev >= PD_REV30)
1387 tcpm_set_state(port, SRC_READY,
1388 cc_req == SINK_TX_OK ?
1389 PD_T_SINK_TX : 0);
1390 else
1391 tcpm_set_state(port, SRC_READY, 0);
1392 break;
1393 }
1394 } else {
1395 if (port->negotiated_rev >= PD_REV30 &&
1396 !tcpm_sink_tx_ok(port) &&
1397 ams != SOFT_RESET_AMS &&
1398 ams != HARD_RESET) {
1399 port->upcoming_state = INVALID_STATE;
1400 tcpm_log(port, "Sink TX No Go");
1401 return -EAGAIN;
1402 }
1403
1404 port->ams = ams;
1405
1406 if (ams == HARD_RESET) {
1407 tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL);
1408 tcpm_set_state(port, HARD_RESET_START, 0);
1409 return ret;
1410 } else if (tcpm_vdm_ams(port)) {
1411 return ret;
1412 }
1413
1414 if (port->state == SNK_READY ||
1415 port->state == SNK_SOFT_RESET)
1416 tcpm_set_state(port, AMS_START, 0);
1417 else
1418 tcpm_set_state(port, SNK_READY, 0);
1419 }
1420
1421 return ret;
1422}
1423
1424
1425
1426
1427static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
1428 const u32 *data, int cnt)
1429{
1430 WARN_ON(!mutex_is_locked(&port->lock));
1431
1432
1433 WARN_ON(port->vdm_state > VDM_STATE_DONE);
1434
1435 port->vdo_count = cnt + 1;
1436 port->vdo_data[0] = header;
1437 memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt);
1438
1439 port->vdm_retries = 0;
1440 port->vdm_state = VDM_STATE_READY;
1441 port->vdm_sm_running = true;
1442
1443 mod_vdm_delayed_work(port, 0);
1444}
1445
1446static void tcpm_queue_vdm_unlocked(struct tcpm_port *port, const u32 header,
1447 const u32 *data, int cnt)
1448{
1449 mutex_lock(&port->lock);
1450 tcpm_queue_vdm(port, header, data, cnt);
1451 mutex_unlock(&port->lock);
1452}
1453
1454static void svdm_consume_identity(struct tcpm_port *port, const u32 *p, int cnt)
1455{
1456 u32 vdo = p[VDO_INDEX_IDH];
1457 u32 product = p[VDO_INDEX_PRODUCT];
1458
1459 memset(&port->mode_data, 0, sizeof(port->mode_data));
1460
1461 port->partner_ident.id_header = vdo;
1462 port->partner_ident.cert_stat = p[VDO_INDEX_CSTAT];
1463 port->partner_ident.product = product;
1464
1465 typec_partner_set_identity(port->partner);
1466
1467 tcpm_log(port, "Identity: %04x:%04x.%04x",
1468 PD_IDH_VID(vdo),
1469 PD_PRODUCT_PID(product), product & 0xffff);
1470}
1471
1472static bool svdm_consume_svids(struct tcpm_port *port, const u32 *p, int cnt)
1473{
1474 struct pd_mode_data *pmdata = &port->mode_data;
1475 int i;
1476
1477 for (i = 1; i < cnt; i++) {
1478 u16 svid;
1479
1480 svid = (p[i] >> 16) & 0xffff;
1481 if (!svid)
1482 return false;
1483
1484 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
1485 goto abort;
1486
1487 pmdata->svids[pmdata->nsvids++] = svid;
1488 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
1489
1490 svid = p[i] & 0xffff;
1491 if (!svid)
1492 return false;
1493
1494 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
1495 goto abort;
1496
1497 pmdata->svids[pmdata->nsvids++] = svid;
1498 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
1499 }
1500 return true;
1501abort:
1502 tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX);
1503 return false;
1504}
1505
1506static void svdm_consume_modes(struct tcpm_port *port, const u32 *p, int cnt)
1507{
1508 struct pd_mode_data *pmdata = &port->mode_data;
1509 struct typec_altmode_desc *paltmode;
1510 int i;
1511
1512 if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) {
1513
1514 return;
1515 }
1516
1517 for (i = 1; i < cnt; i++) {
1518 paltmode = &pmdata->altmode_desc[pmdata->altmodes];
1519 memset(paltmode, 0, sizeof(*paltmode));
1520
1521 paltmode->svid = pmdata->svids[pmdata->svid_index];
1522 paltmode->mode = i;
1523 paltmode->vdo = p[i];
1524
1525 tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x",
1526 pmdata->altmodes, paltmode->svid,
1527 paltmode->mode, paltmode->vdo);
1528
1529 pmdata->altmodes++;
1530 }
1531}
1532
1533static void tcpm_register_partner_altmodes(struct tcpm_port *port)
1534{
1535 struct pd_mode_data *modep = &port->mode_data;
1536 struct typec_altmode *altmode;
1537 int i;
1538
1539 for (i = 0; i < modep->altmodes; i++) {
1540 altmode = typec_partner_register_altmode(port->partner,
1541 &modep->altmode_desc[i]);
1542 if (IS_ERR(altmode)) {
1543 tcpm_log(port, "Failed to register partner SVID 0x%04x",
1544 modep->altmode_desc[i].svid);
1545 altmode = NULL;
1546 }
1547 port->partner_altmode[i] = altmode;
1548 }
1549}
1550
1551#define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header)
1552
1553static int tcpm_pd_svdm(struct tcpm_port *port, struct typec_altmode *adev,
1554 const u32 *p, int cnt, u32 *response,
1555 enum adev_actions *adev_action)
1556{
1557 struct typec_port *typec = port->typec_port;
1558 struct typec_altmode *pdev;
1559 struct pd_mode_data *modep;
1560 int svdm_version;
1561 int rlen = 0;
1562 int cmd_type;
1563 int cmd;
1564 int i;
1565
1566 cmd_type = PD_VDO_CMDT(p[0]);
1567 cmd = PD_VDO_CMD(p[0]);
1568
1569 tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d",
1570 p[0], cmd_type, cmd, cnt);
1571
1572 modep = &port->mode_data;
1573
1574 pdev = typec_match_altmode(port->partner_altmode, ALTMODE_DISCOVERY_MAX,
1575 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1576
1577 svdm_version = typec_get_negotiated_svdm_version(typec);
1578 if (svdm_version < 0)
1579 return 0;
1580
1581 switch (cmd_type) {
1582 case CMDT_INIT:
1583 switch (cmd) {
1584 case CMD_DISCOVER_IDENT:
1585 if (PD_VDO_VID(p[0]) != USB_SID_PD)
1586 break;
1587
1588 if (PD_VDO_SVDM_VER(p[0]) < svdm_version) {
1589 typec_partner_set_svdm_version(port->partner,
1590 PD_VDO_SVDM_VER(p[0]));
1591 svdm_version = PD_VDO_SVDM_VER(p[0]);
1592 }
1593
1594 port->ams = DISCOVER_IDENTITY;
1595
1596
1597
1598
1599
1600 if ((port->data_role == TYPEC_DEVICE || svdm_version >= SVDM_VER_2_0) &&
1601 port->nr_snk_vdo) {
1602 if (svdm_version < SVDM_VER_2_0) {
1603 for (i = 0; i < port->nr_snk_vdo_v1; i++)
1604 response[i + 1] = port->snk_vdo_v1[i];
1605 rlen = port->nr_snk_vdo_v1 + 1;
1606
1607 } else {
1608 for (i = 0; i < port->nr_snk_vdo; i++)
1609 response[i + 1] = port->snk_vdo[i];
1610 rlen = port->nr_snk_vdo + 1;
1611 }
1612 }
1613 break;
1614 case CMD_DISCOVER_SVID:
1615 port->ams = DISCOVER_SVIDS;
1616 break;
1617 case CMD_DISCOVER_MODES:
1618 port->ams = DISCOVER_MODES;
1619 break;
1620 case CMD_ENTER_MODE:
1621 port->ams = DFP_TO_UFP_ENTER_MODE;
1622 break;
1623 case CMD_EXIT_MODE:
1624 port->ams = DFP_TO_UFP_EXIT_MODE;
1625 break;
1626 case CMD_ATTENTION:
1627
1628 *adev_action = ADEV_ATTENTION;
1629 return 0;
1630 default:
1631 break;
1632 }
1633 if (rlen >= 1) {
1634 response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK);
1635 } else if (rlen == 0) {
1636 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
1637 rlen = 1;
1638 } else {
1639 response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY);
1640 rlen = 1;
1641 }
1642 response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) |
1643 (VDO_SVDM_VERS(typec_get_negotiated_svdm_version(typec)));
1644 break;
1645 case CMDT_RSP_ACK:
1646
1647 if (IS_ERR_OR_NULL(port->partner))
1648 break;
1649
1650 tcpm_ams_finish(port);
1651
1652 switch (cmd) {
1653 case CMD_DISCOVER_IDENT:
1654 if (PD_VDO_SVDM_VER(p[0]) < svdm_version)
1655 typec_partner_set_svdm_version(port->partner,
1656 PD_VDO_SVDM_VER(p[0]));
1657
1658 svdm_consume_identity(port, p, cnt);
1659 response[0] = VDO(USB_SID_PD, 1, typec_get_negotiated_svdm_version(typec),
1660 CMD_DISCOVER_SVID);
1661 rlen = 1;
1662 break;
1663 case CMD_DISCOVER_SVID:
1664
1665 if (svdm_consume_svids(port, p, cnt)) {
1666 response[0] = VDO(USB_SID_PD, 1, svdm_version, CMD_DISCOVER_SVID);
1667 rlen = 1;
1668 } else if (modep->nsvids && supports_modal(port)) {
1669 response[0] = VDO(modep->svids[0], 1, svdm_version,
1670 CMD_DISCOVER_MODES);
1671 rlen = 1;
1672 }
1673 break;
1674 case CMD_DISCOVER_MODES:
1675
1676 svdm_consume_modes(port, p, cnt);
1677 modep->svid_index++;
1678 if (modep->svid_index < modep->nsvids) {
1679 u16 svid = modep->svids[modep->svid_index];
1680 response[0] = VDO(svid, 1, svdm_version, CMD_DISCOVER_MODES);
1681 rlen = 1;
1682 } else {
1683 tcpm_register_partner_altmodes(port);
1684 }
1685 break;
1686 case CMD_ENTER_MODE:
1687 if (adev && pdev) {
1688 typec_altmode_update_active(pdev, true);
1689 *adev_action = ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL;
1690 }
1691 return 0;
1692 case CMD_EXIT_MODE:
1693 if (adev && pdev) {
1694 typec_altmode_update_active(pdev, false);
1695
1696 *adev_action = ADEV_NOTIFY_USB_AND_QUEUE_VDM;
1697 return 0;
1698 }
1699 break;
1700 case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15):
1701 break;
1702 default:
1703
1704 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
1705 rlen = 1;
1706 response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) |
1707 (VDO_SVDM_VERS(svdm_version));
1708 break;
1709 }
1710 break;
1711 case CMDT_RSP_NAK:
1712 tcpm_ams_finish(port);
1713 switch (cmd) {
1714 case CMD_DISCOVER_IDENT:
1715 case CMD_DISCOVER_SVID:
1716 case CMD_DISCOVER_MODES:
1717 case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15):
1718 break;
1719 case CMD_ENTER_MODE:
1720
1721 *adev_action = ADEV_NOTIFY_USB_AND_QUEUE_VDM;
1722 return 0;
1723 default:
1724
1725 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
1726 rlen = 1;
1727 response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) |
1728 (VDO_SVDM_VERS(svdm_version));
1729 break;
1730 }
1731 break;
1732 default:
1733 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
1734 rlen = 1;
1735 response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) |
1736 (VDO_SVDM_VERS(svdm_version));
1737 break;
1738 }
1739
1740
1741 *adev_action = ADEV_QUEUE_VDM;
1742 return rlen;
1743}
1744
1745static void tcpm_pd_handle_msg(struct tcpm_port *port,
1746 enum pd_msg_request message,
1747 enum tcpm_ams ams);
1748
1749static void tcpm_handle_vdm_request(struct tcpm_port *port,
1750 const __le32 *payload, int cnt)
1751{
1752 enum adev_actions adev_action = ADEV_NONE;
1753 struct typec_altmode *adev;
1754 u32 p[PD_MAX_PAYLOAD];
1755 u32 response[8] = { };
1756 int i, rlen = 0;
1757
1758 for (i = 0; i < cnt; i++)
1759 p[i] = le32_to_cpu(payload[i]);
1760
1761 adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX,
1762 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1763
1764 if (port->vdm_state == VDM_STATE_BUSY) {
1765
1766 if (PD_VDO_CMDT(p[0]) == CMDT_RSP_BUSY) {
1767 port->vdm_state = VDM_STATE_WAIT_RSP_BUSY;
1768 port->vdo_retry = (p[0] & ~VDO_CMDT_MASK) |
1769 CMDT_INIT;
1770 mod_vdm_delayed_work(port, PD_T_VDM_BUSY);
1771 return;
1772 }
1773 port->vdm_state = VDM_STATE_DONE;
1774 }
1775
1776 if (PD_VDO_SVDM(p[0]) && (adev || tcpm_vdm_ams(port) || port->nr_snk_vdo)) {
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790 port->vdm_sm_running = true;
1791 rlen = tcpm_pd_svdm(port, adev, p, cnt, response, &adev_action);
1792 } else {
1793 if (port->negotiated_rev >= PD_REV30)
1794 tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
1795 }
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816 mutex_unlock(&port->lock);
1817
1818 if (adev) {
1819 switch (adev_action) {
1820 case ADEV_NONE:
1821 break;
1822 case ADEV_NOTIFY_USB_AND_QUEUE_VDM:
1823 WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB, NULL));
1824 typec_altmode_vdm(adev, p[0], &p[1], cnt);
1825 break;
1826 case ADEV_QUEUE_VDM:
1827 typec_altmode_vdm(adev, p[0], &p[1], cnt);
1828 break;
1829 case ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL:
1830 if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
1831 int svdm_version = typec_get_negotiated_svdm_version(
1832 port->typec_port);
1833 if (svdm_version < 0)
1834 break;
1835
1836 response[0] = VDO(adev->svid, 1, svdm_version,
1837 CMD_EXIT_MODE);
1838 response[0] |= VDO_OPOS(adev->mode);
1839 rlen = 1;
1840 }
1841 break;
1842 case ADEV_ATTENTION:
1843 typec_altmode_attention(adev, p[1]);
1844 break;
1845 }
1846 }
1847
1848
1849
1850
1851
1852
1853
1854
1855 mutex_lock(&port->lock);
1856
1857 if (rlen > 0)
1858 tcpm_queue_vdm(port, response[0], &response[1], rlen - 1);
1859 else
1860 port->vdm_sm_running = false;
1861}
1862
1863static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd,
1864 const u32 *data, int count)
1865{
1866 int svdm_version = typec_get_negotiated_svdm_version(port->typec_port);
1867 u32 header;
1868
1869 if (svdm_version < 0)
1870 return;
1871
1872 if (WARN_ON(count > VDO_MAX_SIZE - 1))
1873 count = VDO_MAX_SIZE - 1;
1874
1875
1876 header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ?
1877 1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION),
1878 svdm_version, cmd);
1879 tcpm_queue_vdm(port, header, data, count);
1880}
1881
1882static unsigned int vdm_ready_timeout(u32 vdm_hdr)
1883{
1884 unsigned int timeout;
1885 int cmd = PD_VDO_CMD(vdm_hdr);
1886
1887
1888 if (!PD_VDO_SVDM(vdm_hdr))
1889 return PD_T_VDM_UNSTRUCTURED;
1890
1891 switch (PD_VDO_CMDT(vdm_hdr)) {
1892 case CMDT_INIT:
1893 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1894 timeout = PD_T_VDM_WAIT_MODE_E;
1895 else
1896 timeout = PD_T_VDM_SNDR_RSP;
1897 break;
1898 default:
1899 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1900 timeout = PD_T_VDM_E_MODE;
1901 else
1902 timeout = PD_T_VDM_RCVR_RSP;
1903 break;
1904 }
1905 return timeout;
1906}
1907
1908static void vdm_run_state_machine(struct tcpm_port *port)
1909{
1910 struct pd_message msg;
1911 int i, res = 0;
1912 u32 vdo_hdr = port->vdo_data[0];
1913
1914 switch (port->vdm_state) {
1915 case VDM_STATE_READY:
1916
1917 if (!port->attached) {
1918 port->vdm_state = VDM_STATE_ERR_BUSY;
1919 break;
1920 }
1921
1922
1923
1924
1925
1926 if (port->state != SRC_READY && port->state != SNK_READY) {
1927 port->vdm_sm_running = false;
1928 break;
1929 }
1930
1931
1932 if (PD_VDO_SVDM(vdo_hdr) && PD_VDO_CMDT(vdo_hdr) == CMDT_INIT) {
1933 switch (PD_VDO_CMD(vdo_hdr)) {
1934 case CMD_DISCOVER_IDENT:
1935 res = tcpm_ams_start(port, DISCOVER_IDENTITY);
1936 if (res == 0)
1937 port->send_discover = false;
1938 else if (res == -EAGAIN)
1939 mod_send_discover_delayed_work(port,
1940 SEND_DISCOVER_RETRY_MS);
1941 break;
1942 case CMD_DISCOVER_SVID:
1943 res = tcpm_ams_start(port, DISCOVER_SVIDS);
1944 break;
1945 case CMD_DISCOVER_MODES:
1946 res = tcpm_ams_start(port, DISCOVER_MODES);
1947 break;
1948 case CMD_ENTER_MODE:
1949 res = tcpm_ams_start(port, DFP_TO_UFP_ENTER_MODE);
1950 break;
1951 case CMD_EXIT_MODE:
1952 res = tcpm_ams_start(port, DFP_TO_UFP_EXIT_MODE);
1953 break;
1954 case CMD_ATTENTION:
1955 res = tcpm_ams_start(port, ATTENTION);
1956 break;
1957 case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15):
1958 res = tcpm_ams_start(port, STRUCTURED_VDMS);
1959 break;
1960 default:
1961 res = -EOPNOTSUPP;
1962 break;
1963 }
1964
1965 if (res < 0) {
1966 port->vdm_state = VDM_STATE_ERR_BUSY;
1967 return;
1968 }
1969 }
1970
1971 port->vdm_state = VDM_STATE_SEND_MESSAGE;
1972 mod_vdm_delayed_work(port, (port->negotiated_rev >= PD_REV30 &&
1973 port->pwr_role == TYPEC_SOURCE &&
1974 PD_VDO_SVDM(vdo_hdr) &&
1975 PD_VDO_CMDT(vdo_hdr) == CMDT_INIT) ?
1976 PD_T_SINK_TX : 0);
1977 break;
1978 case VDM_STATE_WAIT_RSP_BUSY:
1979 port->vdo_data[0] = port->vdo_retry;
1980 port->vdo_count = 1;
1981 port->vdm_state = VDM_STATE_READY;
1982 tcpm_ams_finish(port);
1983 break;
1984 case VDM_STATE_BUSY:
1985 port->vdm_state = VDM_STATE_ERR_TMOUT;
1986 if (port->ams != NONE_AMS)
1987 tcpm_ams_finish(port);
1988 break;
1989 case VDM_STATE_ERR_SEND:
1990
1991
1992
1993
1994
1995
1996 if (port->vdm_retries < 3) {
1997 tcpm_log(port, "VDM Tx error, retry");
1998 port->vdm_retries++;
1999 port->vdm_state = VDM_STATE_READY;
2000 if (PD_VDO_SVDM(vdo_hdr) && PD_VDO_CMDT(vdo_hdr) == CMDT_INIT)
2001 tcpm_ams_finish(port);
2002 } else {
2003 tcpm_ams_finish(port);
2004 }
2005 break;
2006 case VDM_STATE_SEND_MESSAGE:
2007
2008 memset(&msg, 0, sizeof(msg));
2009 msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF,
2010 port->pwr_role,
2011 port->data_role,
2012 port->negotiated_rev,
2013 port->message_id, port->vdo_count);
2014 for (i = 0; i < port->vdo_count; i++)
2015 msg.payload[i] = cpu_to_le32(port->vdo_data[i]);
2016 res = tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2017 if (res < 0) {
2018 port->vdm_state = VDM_STATE_ERR_SEND;
2019 } else {
2020 unsigned long timeout;
2021
2022 port->vdm_retries = 0;
2023 port->vdm_state = VDM_STATE_BUSY;
2024 timeout = vdm_ready_timeout(vdo_hdr);
2025 mod_vdm_delayed_work(port, timeout);
2026 }
2027 break;
2028 default:
2029 break;
2030 }
2031}
2032
2033static void vdm_state_machine_work(struct kthread_work *work)
2034{
2035 struct tcpm_port *port = container_of(work, struct tcpm_port, vdm_state_machine);
2036 enum vdm_states prev_state;
2037
2038 mutex_lock(&port->lock);
2039
2040
2041
2042
2043
2044 do {
2045 prev_state = port->vdm_state;
2046 vdm_run_state_machine(port);
2047 } while (port->vdm_state != prev_state &&
2048 port->vdm_state != VDM_STATE_BUSY &&
2049 port->vdm_state != VDM_STATE_SEND_MESSAGE);
2050
2051 if (port->vdm_state < VDM_STATE_READY)
2052 port->vdm_sm_running = false;
2053
2054 mutex_unlock(&port->lock);
2055}
2056
2057enum pdo_err {
2058 PDO_NO_ERR,
2059 PDO_ERR_NO_VSAFE5V,
2060 PDO_ERR_VSAFE5V_NOT_FIRST,
2061 PDO_ERR_PDO_TYPE_NOT_IN_ORDER,
2062 PDO_ERR_FIXED_NOT_SORTED,
2063 PDO_ERR_VARIABLE_BATT_NOT_SORTED,
2064 PDO_ERR_DUPE_PDO,
2065 PDO_ERR_PPS_APDO_NOT_SORTED,
2066 PDO_ERR_DUPE_PPS_APDO,
2067};
2068
2069static const char * const pdo_err_msg[] = {
2070 [PDO_ERR_NO_VSAFE5V] =
2071 " err: source/sink caps should at least have vSafe5V",
2072 [PDO_ERR_VSAFE5V_NOT_FIRST] =
2073 " err: vSafe5V Fixed Supply Object Shall always be the first object",
2074 [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] =
2075 " err: PDOs should be in the following order: Fixed; Battery; Variable",
2076 [PDO_ERR_FIXED_NOT_SORTED] =
2077 " err: Fixed supply pdos should be in increasing order of their fixed voltage",
2078 [PDO_ERR_VARIABLE_BATT_NOT_SORTED] =
2079 " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage",
2080 [PDO_ERR_DUPE_PDO] =
2081 " err: Variable/Batt supply pdos cannot have same min/max voltage",
2082 [PDO_ERR_PPS_APDO_NOT_SORTED] =
2083 " err: Programmable power supply apdos should be in increasing order of their maximum voltage",
2084 [PDO_ERR_DUPE_PPS_APDO] =
2085 " err: Programmable power supply apdos cannot have same min/max voltage and max current",
2086};
2087
2088static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo,
2089 unsigned int nr_pdo)
2090{
2091 unsigned int i;
2092
2093
2094 if (nr_pdo < 1)
2095 return PDO_ERR_NO_VSAFE5V;
2096
2097
2098 if (pdo_type(pdo[0]) != PDO_TYPE_FIXED ||
2099 pdo_fixed_voltage(pdo[0]) != VSAFE5V)
2100 return PDO_ERR_VSAFE5V_NOT_FIRST;
2101
2102 for (i = 1; i < nr_pdo; i++) {
2103 if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) {
2104 return PDO_ERR_PDO_TYPE_NOT_IN_ORDER;
2105 } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) {
2106 enum pd_pdo_type type = pdo_type(pdo[i]);
2107
2108 switch (type) {
2109
2110
2111
2112
2113
2114 case PDO_TYPE_FIXED:
2115 if (pdo_fixed_voltage(pdo[i]) <=
2116 pdo_fixed_voltage(pdo[i - 1]))
2117 return PDO_ERR_FIXED_NOT_SORTED;
2118 break;
2119
2120
2121
2122
2123
2124 case PDO_TYPE_VAR:
2125 case PDO_TYPE_BATT:
2126 if (pdo_min_voltage(pdo[i]) <
2127 pdo_min_voltage(pdo[i - 1]))
2128 return PDO_ERR_VARIABLE_BATT_NOT_SORTED;
2129 else if ((pdo_min_voltage(pdo[i]) ==
2130 pdo_min_voltage(pdo[i - 1])) &&
2131 (pdo_max_voltage(pdo[i]) ==
2132 pdo_max_voltage(pdo[i - 1])))
2133 return PDO_ERR_DUPE_PDO;
2134 break;
2135
2136
2137
2138
2139
2140 case PDO_TYPE_APDO:
2141 if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS)
2142 break;
2143
2144 if (pdo_pps_apdo_max_voltage(pdo[i]) <
2145 pdo_pps_apdo_max_voltage(pdo[i - 1]))
2146 return PDO_ERR_PPS_APDO_NOT_SORTED;
2147 else if (pdo_pps_apdo_min_voltage(pdo[i]) ==
2148 pdo_pps_apdo_min_voltage(pdo[i - 1]) &&
2149 pdo_pps_apdo_max_voltage(pdo[i]) ==
2150 pdo_pps_apdo_max_voltage(pdo[i - 1]) &&
2151 pdo_pps_apdo_max_current(pdo[i]) ==
2152 pdo_pps_apdo_max_current(pdo[i - 1]))
2153 return PDO_ERR_DUPE_PPS_APDO;
2154 break;
2155 default:
2156 tcpm_log_force(port, " Unknown pdo type");
2157 }
2158 }
2159 }
2160
2161 return PDO_NO_ERR;
2162}
2163
2164static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo,
2165 unsigned int nr_pdo)
2166{
2167 enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo);
2168
2169 if (err_index != PDO_NO_ERR) {
2170 tcpm_log_force(port, " %s", pdo_err_msg[err_index]);
2171 return -EINVAL;
2172 }
2173
2174 return 0;
2175}
2176
2177static int tcpm_altmode_enter(struct typec_altmode *altmode, u32 *vdo)
2178{
2179 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
2180 int svdm_version;
2181 u32 header;
2182
2183 svdm_version = typec_get_negotiated_svdm_version(port->typec_port);
2184 if (svdm_version < 0)
2185 return svdm_version;
2186
2187 header = VDO(altmode->svid, vdo ? 2 : 1, svdm_version, CMD_ENTER_MODE);
2188 header |= VDO_OPOS(altmode->mode);
2189
2190 tcpm_queue_vdm_unlocked(port, header, vdo, vdo ? 1 : 0);
2191 return 0;
2192}
2193
2194static int tcpm_altmode_exit(struct typec_altmode *altmode)
2195{
2196 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
2197 int svdm_version;
2198 u32 header;
2199
2200 svdm_version = typec_get_negotiated_svdm_version(port->typec_port);
2201 if (svdm_version < 0)
2202 return svdm_version;
2203
2204 header = VDO(altmode->svid, 1, svdm_version, CMD_EXIT_MODE);
2205 header |= VDO_OPOS(altmode->mode);
2206
2207 tcpm_queue_vdm_unlocked(port, header, NULL, 0);
2208 return 0;
2209}
2210
2211static int tcpm_altmode_vdm(struct typec_altmode *altmode,
2212 u32 header, const u32 *data, int count)
2213{
2214 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
2215
2216 tcpm_queue_vdm_unlocked(port, header, data, count - 1);
2217
2218 return 0;
2219}
2220
2221static const struct typec_altmode_ops tcpm_altmode_ops = {
2222 .enter = tcpm_altmode_enter,
2223 .exit = tcpm_altmode_exit,
2224 .vdm = tcpm_altmode_vdm,
2225};
2226
2227
2228
2229
2230static inline enum tcpm_state ready_state(struct tcpm_port *port)
2231{
2232 if (port->pwr_role == TYPEC_SOURCE)
2233 return SRC_READY;
2234 else
2235 return SNK_READY;
2236}
2237
2238static int tcpm_pd_send_control(struct tcpm_port *port,
2239 enum pd_ctrl_msg_type type);
2240
2241static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload,
2242 int cnt)
2243{
2244 u32 p0 = le32_to_cpu(payload[0]);
2245 unsigned int type = usb_pd_ado_type(p0);
2246
2247 if (!type) {
2248 tcpm_log(port, "Alert message received with no type");
2249 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
2250 return;
2251 }
2252
2253
2254 if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) {
2255 if (port->pwr_role == TYPEC_SOURCE) {
2256 port->upcoming_state = GET_STATUS_SEND;
2257 tcpm_ams_start(port, GETTING_SOURCE_SINK_STATUS);
2258 } else {
2259
2260
2261
2262
2263 port->ams = GETTING_SOURCE_SINK_STATUS;
2264 tcpm_set_state(port, GET_STATUS_SEND, 0);
2265 }
2266 } else {
2267 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
2268 }
2269}
2270
2271static int tcpm_set_auto_vbus_discharge_threshold(struct tcpm_port *port,
2272 enum typec_pwr_opmode mode, bool pps_active,
2273 u32 requested_vbus_voltage)
2274{
2275 int ret;
2276
2277 if (!port->tcpc->set_auto_vbus_discharge_threshold)
2278 return 0;
2279
2280 ret = port->tcpc->set_auto_vbus_discharge_threshold(port->tcpc, mode, pps_active,
2281 requested_vbus_voltage);
2282 tcpm_log_force(port,
2283 "set_auto_vbus_discharge_threshold mode:%d pps_active:%c vbus:%u ret:%d",
2284 mode, pps_active ? 'y' : 'n', requested_vbus_voltage, ret);
2285
2286 return ret;
2287}
2288
2289static void tcpm_pd_handle_state(struct tcpm_port *port,
2290 enum tcpm_state state,
2291 enum tcpm_ams ams,
2292 unsigned int delay_ms)
2293{
2294 switch (port->state) {
2295 case SRC_READY:
2296 case SNK_READY:
2297 port->ams = ams;
2298 tcpm_set_state(port, state, delay_ms);
2299 break;
2300
2301 case SNK_TRANSITION_SINK:
2302 case SNK_TRANSITION_SINK_VBUS:
2303 case SRC_TRANSITION_SUPPLY:
2304 tcpm_set_state(port, HARD_RESET_SEND, 0);
2305 break;
2306 default:
2307 if (!tcpm_ams_interruptible(port)) {
2308 tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ?
2309 SRC_SOFT_RESET_WAIT_SNK_TX :
2310 SNK_SOFT_RESET,
2311 0);
2312 } else {
2313
2314 port->upcoming_state = state;
2315 port->next_ams = ams;
2316 tcpm_set_state(port, ready_state(port), delay_ms);
2317 }
2318 break;
2319 }
2320}
2321
2322static void tcpm_pd_handle_msg(struct tcpm_port *port,
2323 enum pd_msg_request message,
2324 enum tcpm_ams ams)
2325{
2326 switch (port->state) {
2327 case SRC_READY:
2328 case SNK_READY:
2329 port->ams = ams;
2330 tcpm_queue_message(port, message);
2331 break;
2332
2333 case SNK_TRANSITION_SINK:
2334 case SNK_TRANSITION_SINK_VBUS:
2335 case SRC_TRANSITION_SUPPLY:
2336 tcpm_set_state(port, HARD_RESET_SEND, 0);
2337 break;
2338 default:
2339 if (!tcpm_ams_interruptible(port)) {
2340 tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ?
2341 SRC_SOFT_RESET_WAIT_SNK_TX :
2342 SNK_SOFT_RESET,
2343 0);
2344 } else {
2345 port->next_ams = ams;
2346 tcpm_set_state(port, ready_state(port), 0);
2347
2348 tcpm_queue_message(port, message);
2349 }
2350 break;
2351 }
2352}
2353
2354static void tcpm_pd_data_request(struct tcpm_port *port,
2355 const struct pd_message *msg)
2356{
2357 enum pd_data_msg_type type = pd_header_type_le(msg->header);
2358 unsigned int cnt = pd_header_cnt_le(msg->header);
2359 unsigned int rev = pd_header_rev_le(msg->header);
2360 unsigned int i;
2361 enum frs_typec_current partner_frs_current;
2362 bool frs_enable;
2363 int ret;
2364
2365 if (tcpm_vdm_ams(port) && type != PD_DATA_VENDOR_DEF) {
2366 port->vdm_state = VDM_STATE_ERR_BUSY;
2367 tcpm_ams_finish(port);
2368 mod_vdm_delayed_work(port, 0);
2369 }
2370
2371 switch (type) {
2372 case PD_DATA_SOURCE_CAP:
2373 for (i = 0; i < cnt; i++)
2374 port->source_caps[i] = le32_to_cpu(msg->payload[i]);
2375
2376 port->nr_source_caps = cnt;
2377
2378 tcpm_log_source_caps(port);
2379
2380 tcpm_validate_caps(port, port->source_caps,
2381 port->nr_source_caps);
2382
2383
2384
2385
2386
2387
2388 if (rev == PD_REV10) {
2389 if (port->ams == GET_SOURCE_CAPABILITIES)
2390 tcpm_ams_finish(port);
2391 break;
2392 }
2393
2394 if (rev < PD_MAX_REV)
2395 port->negotiated_rev = rev;
2396
2397 if (port->pwr_role == TYPEC_SOURCE) {
2398 if (port->ams == GET_SOURCE_CAPABILITIES)
2399 tcpm_pd_handle_state(port, SRC_READY, NONE_AMS, 0);
2400
2401 else
2402 tcpm_pd_handle_msg(port,
2403 port->negotiated_rev < PD_REV30 ?
2404 PD_MSG_CTRL_REJECT :
2405 PD_MSG_CTRL_NOT_SUPP,
2406 NONE_AMS);
2407 } else if (port->state == SNK_WAIT_CAPABILITIES) {
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421 port->ams = POWER_NEGOTIATION;
2422 port->in_ams = true;
2423 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
2424 } else {
2425 if (port->ams == GET_SOURCE_CAPABILITIES)
2426 tcpm_ams_finish(port);
2427 tcpm_pd_handle_state(port, SNK_NEGOTIATE_CAPABILITIES,
2428 POWER_NEGOTIATION, 0);
2429 }
2430 break;
2431 case PD_DATA_REQUEST:
2432
2433
2434
2435
2436
2437 if (rev == PD_REV10) {
2438 tcpm_pd_handle_msg(port,
2439 port->negotiated_rev < PD_REV30 ?
2440 PD_MSG_CTRL_REJECT :
2441 PD_MSG_CTRL_NOT_SUPP,
2442 NONE_AMS);
2443 break;
2444 }
2445
2446 if (rev < PD_MAX_REV)
2447 port->negotiated_rev = rev;
2448
2449 if (port->pwr_role != TYPEC_SOURCE || cnt != 1) {
2450 tcpm_pd_handle_msg(port,
2451 port->negotiated_rev < PD_REV30 ?
2452 PD_MSG_CTRL_REJECT :
2453 PD_MSG_CTRL_NOT_SUPP,
2454 NONE_AMS);
2455 break;
2456 }
2457
2458 port->sink_request = le32_to_cpu(msg->payload[0]);
2459
2460 if (port->vdm_sm_running && port->explicit_contract) {
2461 tcpm_pd_handle_msg(port, PD_MSG_CTRL_WAIT, port->ams);
2462 break;
2463 }
2464
2465 if (port->state == SRC_SEND_CAPABILITIES)
2466 tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0);
2467 else
2468 tcpm_pd_handle_state(port, SRC_NEGOTIATE_CAPABILITIES,
2469 POWER_NEGOTIATION, 0);
2470 break;
2471 case PD_DATA_SINK_CAP:
2472
2473 for (i = 0; i < cnt; i++)
2474 port->sink_caps[i] = le32_to_cpu(msg->payload[i]);
2475
2476 partner_frs_current = (port->sink_caps[0] & PDO_FIXED_FRS_CURR_MASK) >>
2477 PDO_FIXED_FRS_CURR_SHIFT;
2478 frs_enable = partner_frs_current && (partner_frs_current <=
2479 port->new_source_frs_current);
2480 tcpm_log(port,
2481 "Port partner FRS capable partner_frs_current:%u port_frs_current:%u enable:%c",
2482 partner_frs_current, port->new_source_frs_current, frs_enable ? 'y' : 'n');
2483 if (frs_enable) {
2484 ret = port->tcpc->enable_frs(port->tcpc, true);
2485 tcpm_log(port, "Enable FRS %s, ret:%d\n", ret ? "fail" : "success", ret);
2486 }
2487
2488 port->nr_sink_caps = cnt;
2489 port->sink_cap_done = true;
2490 if (port->ams == GET_SINK_CAPABILITIES)
2491 tcpm_set_state(port, ready_state(port), 0);
2492
2493 else
2494 tcpm_pd_handle_msg(port,
2495 port->negotiated_rev < PD_REV30 ?
2496 PD_MSG_CTRL_REJECT :
2497 PD_MSG_CTRL_NOT_SUPP,
2498 NONE_AMS);
2499 break;
2500 case PD_DATA_VENDOR_DEF:
2501 tcpm_handle_vdm_request(port, msg->payload, cnt);
2502 break;
2503 case PD_DATA_BIST:
2504 port->bist_request = le32_to_cpu(msg->payload[0]);
2505 tcpm_pd_handle_state(port, BIST_RX, BIST, 0);
2506 break;
2507 case PD_DATA_ALERT:
2508 if (port->state != SRC_READY && port->state != SNK_READY)
2509 tcpm_pd_handle_state(port, port->pwr_role == TYPEC_SOURCE ?
2510 SRC_SOFT_RESET_WAIT_SNK_TX : SNK_SOFT_RESET,
2511 NONE_AMS, 0);
2512 else
2513 tcpm_handle_alert(port, msg->payload, cnt);
2514 break;
2515 case PD_DATA_BATT_STATUS:
2516 case PD_DATA_GET_COUNTRY_INFO:
2517
2518 tcpm_pd_handle_msg(port, port->negotiated_rev < PD_REV30 ?
2519 PD_MSG_CTRL_REJECT :
2520 PD_MSG_CTRL_NOT_SUPP,
2521 NONE_AMS);
2522 break;
2523 default:
2524 tcpm_pd_handle_msg(port, port->negotiated_rev < PD_REV30 ?
2525 PD_MSG_CTRL_REJECT :
2526 PD_MSG_CTRL_NOT_SUPP,
2527 NONE_AMS);
2528 tcpm_log(port, "Unrecognized data message type %#x", type);
2529 break;
2530 }
2531}
2532
2533static void tcpm_pps_complete(struct tcpm_port *port, int result)
2534{
2535 if (port->pps_pending) {
2536 port->pps_status = result;
2537 port->pps_pending = false;
2538 complete(&port->pps_complete);
2539 }
2540}
2541
2542static void tcpm_pd_ctrl_request(struct tcpm_port *port,
2543 const struct pd_message *msg)
2544{
2545 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
2546 enum tcpm_state next_state;
2547
2548
2549
2550
2551
2552 if (tcpm_vdm_ams(port) && type != PD_CTRL_NOT_SUPP && type != PD_CTRL_GOOD_CRC) {
2553 port->vdm_state = VDM_STATE_ERR_BUSY;
2554 tcpm_ams_finish(port);
2555 mod_vdm_delayed_work(port, 0);
2556 }
2557
2558 switch (type) {
2559 case PD_CTRL_GOOD_CRC:
2560 case PD_CTRL_PING:
2561 break;
2562 case PD_CTRL_GET_SOURCE_CAP:
2563 tcpm_pd_handle_msg(port, PD_MSG_DATA_SOURCE_CAP, GET_SOURCE_CAPABILITIES);
2564 break;
2565 case PD_CTRL_GET_SINK_CAP:
2566 tcpm_pd_handle_msg(port, PD_MSG_DATA_SINK_CAP, GET_SINK_CAPABILITIES);
2567 break;
2568 case PD_CTRL_GOTO_MIN:
2569 break;
2570 case PD_CTRL_PS_RDY:
2571 switch (port->state) {
2572 case SNK_TRANSITION_SINK:
2573 if (port->vbus_present) {
2574 tcpm_set_current_limit(port,
2575 port->req_current_limit,
2576 port->req_supply_voltage);
2577 port->explicit_contract = true;
2578 tcpm_set_auto_vbus_discharge_threshold(port,
2579 TYPEC_PWR_MODE_PD,
2580 port->pps_data.active,
2581 port->supply_voltage);
2582 tcpm_set_state(port, SNK_READY, 0);
2583 } else {
2584
2585
2586
2587
2588 tcpm_set_state(port,
2589 SNK_TRANSITION_SINK_VBUS, 0);
2590 }
2591 break;
2592 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
2593 tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0);
2594 break;
2595 case PR_SWAP_SNK_SRC_SINK_OFF:
2596 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0);
2597 break;
2598 case VCONN_SWAP_WAIT_FOR_VCONN:
2599 tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0);
2600 break;
2601 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
2602 tcpm_set_state(port, FR_SWAP_SNK_SRC_NEW_SINK_READY, 0);
2603 break;
2604 default:
2605 tcpm_pd_handle_state(port,
2606 port->pwr_role == TYPEC_SOURCE ?
2607 SRC_SOFT_RESET_WAIT_SNK_TX :
2608 SNK_SOFT_RESET,
2609 NONE_AMS, 0);
2610 break;
2611 }
2612 break;
2613 case PD_CTRL_REJECT:
2614 case PD_CTRL_WAIT:
2615 case PD_CTRL_NOT_SUPP:
2616 switch (port->state) {
2617 case SNK_NEGOTIATE_CAPABILITIES:
2618
2619 if (port->explicit_contract)
2620 next_state = SNK_READY;
2621 else
2622 next_state = SNK_WAIT_CAPABILITIES;
2623
2624
2625 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD,
2626 port->pps_data.active,
2627 port->supply_voltage);
2628 tcpm_set_state(port, next_state, 0);
2629 break;
2630 case SNK_NEGOTIATE_PPS_CAPABILITIES:
2631
2632 port->pps_data.req_out_volt = port->supply_voltage;
2633 port->pps_data.req_op_curr = port->current_limit;
2634 port->pps_status = (type == PD_CTRL_WAIT ?
2635 -EAGAIN : -EOPNOTSUPP);
2636
2637
2638 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD,
2639 port->pps_data.active,
2640 port->supply_voltage);
2641
2642 tcpm_set_state(port, SNK_READY, 0);
2643 break;
2644 case DR_SWAP_SEND:
2645 port->swap_status = (type == PD_CTRL_WAIT ?
2646 -EAGAIN : -EOPNOTSUPP);
2647 tcpm_set_state(port, DR_SWAP_CANCEL, 0);
2648 break;
2649 case PR_SWAP_SEND:
2650 port->swap_status = (type == PD_CTRL_WAIT ?
2651 -EAGAIN : -EOPNOTSUPP);
2652 tcpm_set_state(port, PR_SWAP_CANCEL, 0);
2653 break;
2654 case VCONN_SWAP_SEND:
2655 port->swap_status = (type == PD_CTRL_WAIT ?
2656 -EAGAIN : -EOPNOTSUPP);
2657 tcpm_set_state(port, VCONN_SWAP_CANCEL, 0);
2658 break;
2659 case FR_SWAP_SEND:
2660 tcpm_set_state(port, FR_SWAP_CANCEL, 0);
2661 break;
2662 case GET_SINK_CAP:
2663 port->sink_cap_done = true;
2664 tcpm_set_state(port, ready_state(port), 0);
2665 break;
2666 case SRC_READY:
2667 case SNK_READY:
2668 if (port->vdm_state > VDM_STATE_READY) {
2669 port->vdm_state = VDM_STATE_DONE;
2670 if (tcpm_vdm_ams(port))
2671 tcpm_ams_finish(port);
2672 mod_vdm_delayed_work(port, 0);
2673 break;
2674 }
2675 fallthrough;
2676 default:
2677 tcpm_pd_handle_state(port,
2678 port->pwr_role == TYPEC_SOURCE ?
2679 SRC_SOFT_RESET_WAIT_SNK_TX :
2680 SNK_SOFT_RESET,
2681 NONE_AMS, 0);
2682 break;
2683 }
2684 break;
2685 case PD_CTRL_ACCEPT:
2686 switch (port->state) {
2687 case SNK_NEGOTIATE_CAPABILITIES:
2688 port->pps_data.active = false;
2689 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
2690 break;
2691 case SNK_NEGOTIATE_PPS_CAPABILITIES:
2692 port->pps_data.active = true;
2693 port->pps_data.min_volt = port->pps_data.req_min_volt;
2694 port->pps_data.max_volt = port->pps_data.req_max_volt;
2695 port->pps_data.max_curr = port->pps_data.req_max_curr;
2696 port->req_supply_voltage = port->pps_data.req_out_volt;
2697 port->req_current_limit = port->pps_data.req_op_curr;
2698 power_supply_changed(port->psy);
2699 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
2700 break;
2701 case SOFT_RESET_SEND:
2702 if (port->ams == SOFT_RESET_AMS)
2703 tcpm_ams_finish(port);
2704 if (port->pwr_role == TYPEC_SOURCE) {
2705 port->upcoming_state = SRC_SEND_CAPABILITIES;
2706 tcpm_ams_start(port, POWER_NEGOTIATION);
2707 } else {
2708 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
2709 }
2710 break;
2711 case DR_SWAP_SEND:
2712 tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0);
2713 break;
2714 case PR_SWAP_SEND:
2715 tcpm_set_state(port, PR_SWAP_START, 0);
2716 break;
2717 case VCONN_SWAP_SEND:
2718 tcpm_set_state(port, VCONN_SWAP_START, 0);
2719 break;
2720 case FR_SWAP_SEND:
2721 tcpm_set_state(port, FR_SWAP_SNK_SRC_TRANSITION_TO_OFF, 0);
2722 break;
2723 default:
2724 tcpm_pd_handle_state(port,
2725 port->pwr_role == TYPEC_SOURCE ?
2726 SRC_SOFT_RESET_WAIT_SNK_TX :
2727 SNK_SOFT_RESET,
2728 NONE_AMS, 0);
2729 break;
2730 }
2731 break;
2732 case PD_CTRL_SOFT_RESET:
2733 port->ams = SOFT_RESET_AMS;
2734 tcpm_set_state(port, SOFT_RESET, 0);
2735 break;
2736 case PD_CTRL_DR_SWAP:
2737
2738
2739
2740
2741
2742 if (port->typec_caps.data != TYPEC_PORT_DRD) {
2743 tcpm_pd_handle_msg(port,
2744 port->negotiated_rev < PD_REV30 ?
2745 PD_MSG_CTRL_REJECT :
2746 PD_MSG_CTRL_NOT_SUPP,
2747 NONE_AMS);
2748 } else {
2749 if (port->send_discover) {
2750 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
2751 break;
2752 }
2753
2754 tcpm_pd_handle_state(port, DR_SWAP_ACCEPT, DATA_ROLE_SWAP, 0);
2755 }
2756 break;
2757 case PD_CTRL_PR_SWAP:
2758 if (port->port_type != TYPEC_PORT_DRP) {
2759 tcpm_pd_handle_msg(port,
2760 port->negotiated_rev < PD_REV30 ?
2761 PD_MSG_CTRL_REJECT :
2762 PD_MSG_CTRL_NOT_SUPP,
2763 NONE_AMS);
2764 } else {
2765 if (port->send_discover) {
2766 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
2767 break;
2768 }
2769
2770 tcpm_pd_handle_state(port, PR_SWAP_ACCEPT, POWER_ROLE_SWAP, 0);
2771 }
2772 break;
2773 case PD_CTRL_VCONN_SWAP:
2774 if (port->send_discover) {
2775 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
2776 break;
2777 }
2778
2779 tcpm_pd_handle_state(port, VCONN_SWAP_ACCEPT, VCONN_SWAP, 0);
2780 break;
2781 case PD_CTRL_GET_SOURCE_CAP_EXT:
2782 case PD_CTRL_GET_STATUS:
2783 case PD_CTRL_FR_SWAP:
2784 case PD_CTRL_GET_PPS_STATUS:
2785 case PD_CTRL_GET_COUNTRY_CODES:
2786
2787 tcpm_pd_handle_msg(port,
2788 port->negotiated_rev < PD_REV30 ?
2789 PD_MSG_CTRL_REJECT :
2790 PD_MSG_CTRL_NOT_SUPP,
2791 NONE_AMS);
2792 break;
2793 default:
2794 tcpm_pd_handle_msg(port,
2795 port->negotiated_rev < PD_REV30 ?
2796 PD_MSG_CTRL_REJECT :
2797 PD_MSG_CTRL_NOT_SUPP,
2798 NONE_AMS);
2799 tcpm_log(port, "Unrecognized ctrl message type %#x", type);
2800 break;
2801 }
2802}
2803
2804static void tcpm_pd_ext_msg_request(struct tcpm_port *port,
2805 const struct pd_message *msg)
2806{
2807 enum pd_ext_msg_type type = pd_header_type_le(msg->header);
2808 unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header);
2809
2810
2811 if (tcpm_vdm_ams(port)) {
2812 port->vdm_state = VDM_STATE_ERR_BUSY;
2813 tcpm_ams_finish(port);
2814 mod_vdm_delayed_work(port, 0);
2815 }
2816
2817 if (!(le16_to_cpu(msg->ext_msg.header) & PD_EXT_HDR_CHUNKED)) {
2818 tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
2819 tcpm_log(port, "Unchunked extended messages unsupported");
2820 return;
2821 }
2822
2823 if (data_size > PD_EXT_MAX_CHUNK_DATA) {
2824 tcpm_pd_handle_state(port, CHUNK_NOT_SUPP, NONE_AMS, PD_T_CHUNK_NOT_SUPP);
2825 tcpm_log(port, "Chunk handling not yet supported");
2826 return;
2827 }
2828
2829 switch (type) {
2830 case PD_EXT_STATUS:
2831 case PD_EXT_PPS_STATUS:
2832 if (port->ams == GETTING_SOURCE_SINK_STATUS) {
2833 tcpm_ams_finish(port);
2834 tcpm_set_state(port, ready_state(port), 0);
2835 } else {
2836
2837 tcpm_pd_handle_state(port, port->pwr_role == TYPEC_SOURCE ?
2838 SRC_SOFT_RESET_WAIT_SNK_TX : SNK_SOFT_RESET,
2839 NONE_AMS, 0);
2840 }
2841 break;
2842 case PD_EXT_SOURCE_CAP_EXT:
2843 case PD_EXT_GET_BATT_CAP:
2844 case PD_EXT_GET_BATT_STATUS:
2845 case PD_EXT_BATT_CAP:
2846 case PD_EXT_GET_MANUFACTURER_INFO:
2847 case PD_EXT_MANUFACTURER_INFO:
2848 case PD_EXT_SECURITY_REQUEST:
2849 case PD_EXT_SECURITY_RESPONSE:
2850 case PD_EXT_FW_UPDATE_REQUEST:
2851 case PD_EXT_FW_UPDATE_RESPONSE:
2852 case PD_EXT_COUNTRY_INFO:
2853 case PD_EXT_COUNTRY_CODES:
2854 tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
2855 break;
2856 default:
2857 tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
2858 tcpm_log(port, "Unrecognized extended message type %#x", type);
2859 break;
2860 }
2861}
2862
2863static void tcpm_pd_rx_handler(struct kthread_work *work)
2864{
2865 struct pd_rx_event *event = container_of(work,
2866 struct pd_rx_event, work);
2867 const struct pd_message *msg = &event->msg;
2868 unsigned int cnt = pd_header_cnt_le(msg->header);
2869 struct tcpm_port *port = event->port;
2870
2871 mutex_lock(&port->lock);
2872
2873 tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header),
2874 port->attached);
2875
2876 if (port->attached) {
2877 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
2878 unsigned int msgid = pd_header_msgid_le(msg->header);
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889 if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET)
2890 goto done;
2891 port->rx_msgid = msgid;
2892
2893
2894
2895
2896
2897 if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) ==
2898 (port->data_role == TYPEC_HOST)) {
2899 tcpm_log(port,
2900 "Data role mismatch, initiating error recovery");
2901 tcpm_set_state(port, ERROR_RECOVERY, 0);
2902 } else {
2903 if (le16_to_cpu(msg->header) & PD_HEADER_EXT_HDR)
2904 tcpm_pd_ext_msg_request(port, msg);
2905 else if (cnt)
2906 tcpm_pd_data_request(port, msg);
2907 else
2908 tcpm_pd_ctrl_request(port, msg);
2909 }
2910 }
2911
2912done:
2913 mutex_unlock(&port->lock);
2914 kfree(event);
2915}
2916
2917void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg)
2918{
2919 struct pd_rx_event *event;
2920
2921 event = kzalloc(sizeof(*event), GFP_ATOMIC);
2922 if (!event)
2923 return;
2924
2925 kthread_init_work(&event->work, tcpm_pd_rx_handler);
2926 event->port = port;
2927 memcpy(&event->msg, msg, sizeof(*msg));
2928 kthread_queue_work(port->wq, &event->work);
2929}
2930EXPORT_SYMBOL_GPL(tcpm_pd_receive);
2931
2932static int tcpm_pd_send_control(struct tcpm_port *port,
2933 enum pd_ctrl_msg_type type)
2934{
2935 struct pd_message msg;
2936
2937 memset(&msg, 0, sizeof(msg));
2938 msg.header = PD_HEADER_LE(type, port->pwr_role,
2939 port->data_role,
2940 port->negotiated_rev,
2941 port->message_id, 0);
2942
2943 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2944}
2945
2946
2947
2948
2949
2950
2951static bool tcpm_send_queued_message(struct tcpm_port *port)
2952{
2953 enum pd_msg_request queued_message;
2954 int ret;
2955
2956 do {
2957 queued_message = port->queued_message;
2958 port->queued_message = PD_MSG_NONE;
2959
2960 switch (queued_message) {
2961 case PD_MSG_CTRL_WAIT:
2962 tcpm_pd_send_control(port, PD_CTRL_WAIT);
2963 break;
2964 case PD_MSG_CTRL_REJECT:
2965 tcpm_pd_send_control(port, PD_CTRL_REJECT);
2966 break;
2967 case PD_MSG_CTRL_NOT_SUPP:
2968 tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP);
2969 break;
2970 case PD_MSG_DATA_SINK_CAP:
2971 ret = tcpm_pd_send_sink_caps(port);
2972 if (ret < 0) {
2973 tcpm_log(port, "Unable to send snk caps, ret=%d", ret);
2974 tcpm_set_state(port, SNK_SOFT_RESET, 0);
2975 }
2976 tcpm_ams_finish(port);
2977 break;
2978 case PD_MSG_DATA_SOURCE_CAP:
2979 ret = tcpm_pd_send_source_caps(port);
2980 if (ret < 0) {
2981 tcpm_log(port,
2982 "Unable to send src caps, ret=%d",
2983 ret);
2984 tcpm_set_state(port, SOFT_RESET_SEND, 0);
2985 } else if (port->pwr_role == TYPEC_SOURCE) {
2986 tcpm_ams_finish(port);
2987 tcpm_set_state(port, HARD_RESET_SEND,
2988 PD_T_SENDER_RESPONSE);
2989 } else {
2990 tcpm_ams_finish(port);
2991 }
2992 break;
2993 default:
2994 break;
2995 }
2996 } while (port->queued_message != PD_MSG_NONE);
2997
2998 if (port->delayed_state != INVALID_STATE) {
2999 if (ktime_after(port->delayed_runtime, ktime_get())) {
3000 mod_tcpm_delayed_work(port, ktime_to_ms(ktime_sub(port->delayed_runtime,
3001 ktime_get())));
3002 return true;
3003 }
3004 port->delayed_state = INVALID_STATE;
3005 }
3006 return false;
3007}
3008
3009static int tcpm_pd_check_request(struct tcpm_port *port)
3010{
3011 u32 pdo, rdo = port->sink_request;
3012 unsigned int max, op, pdo_max, index;
3013 enum pd_pdo_type type;
3014
3015 index = rdo_index(rdo);
3016 if (!index || index > port->nr_src_pdo)
3017 return -EINVAL;
3018
3019 pdo = port->src_pdo[index - 1];
3020 type = pdo_type(pdo);
3021 switch (type) {
3022 case PDO_TYPE_FIXED:
3023 case PDO_TYPE_VAR:
3024 max = rdo_max_current(rdo);
3025 op = rdo_op_current(rdo);
3026 pdo_max = pdo_max_current(pdo);
3027
3028 if (op > pdo_max)
3029 return -EINVAL;
3030 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
3031 return -EINVAL;
3032
3033 if (type == PDO_TYPE_FIXED)
3034 tcpm_log(port,
3035 "Requested %u mV, %u mA for %u / %u mA",
3036 pdo_fixed_voltage(pdo), pdo_max, op, max);
3037 else
3038 tcpm_log(port,
3039 "Requested %u -> %u mV, %u mA for %u / %u mA",
3040 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
3041 pdo_max, op, max);
3042 break;
3043 case PDO_TYPE_BATT:
3044 max = rdo_max_power(rdo);
3045 op = rdo_op_power(rdo);
3046 pdo_max = pdo_max_power(pdo);
3047
3048 if (op > pdo_max)
3049 return -EINVAL;
3050 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
3051 return -EINVAL;
3052 tcpm_log(port,
3053 "Requested %u -> %u mV, %u mW for %u / %u mW",
3054 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
3055 pdo_max, op, max);
3056 break;
3057 default:
3058 return -EINVAL;
3059 }
3060
3061 port->op_vsafe5v = index == 1;
3062
3063 return 0;
3064}
3065
3066#define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y))
3067#define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y))
3068
3069static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo,
3070 int *src_pdo)
3071{
3072 unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0,
3073 max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0,
3074 min_snk_mv = 0;
3075 int ret = -EINVAL;
3076
3077 port->pps_data.supported = false;
3078 port->usb_type = POWER_SUPPLY_USB_TYPE_PD;
3079 power_supply_changed(port->psy);
3080
3081
3082
3083
3084
3085 for (i = 0; i < port->nr_source_caps; i++) {
3086 u32 pdo = port->source_caps[i];
3087 enum pd_pdo_type type = pdo_type(pdo);
3088
3089 switch (type) {
3090 case PDO_TYPE_FIXED:
3091 max_src_mv = pdo_fixed_voltage(pdo);
3092 min_src_mv = max_src_mv;
3093 break;
3094 case PDO_TYPE_BATT:
3095 case PDO_TYPE_VAR:
3096 max_src_mv = pdo_max_voltage(pdo);
3097 min_src_mv = pdo_min_voltage(pdo);
3098 break;
3099 case PDO_TYPE_APDO:
3100 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) {
3101 port->pps_data.supported = true;
3102 port->usb_type =
3103 POWER_SUPPLY_USB_TYPE_PD_PPS;
3104 power_supply_changed(port->psy);
3105 }
3106 continue;
3107 default:
3108 tcpm_log(port, "Invalid source PDO type, ignoring");
3109 continue;
3110 }
3111
3112 switch (type) {
3113 case PDO_TYPE_FIXED:
3114 case PDO_TYPE_VAR:
3115 src_ma = pdo_max_current(pdo);
3116 src_mw = src_ma * min_src_mv / 1000;
3117 break;
3118 case PDO_TYPE_BATT:
3119 src_mw = pdo_max_power(pdo);
3120 break;
3121 case PDO_TYPE_APDO:
3122 continue;
3123 default:
3124 tcpm_log(port, "Invalid source PDO type, ignoring");
3125 continue;
3126 }
3127
3128 for (j = 0; j < port->nr_snk_pdo; j++) {
3129 pdo = port->snk_pdo[j];
3130
3131 switch (pdo_type(pdo)) {
3132 case PDO_TYPE_FIXED:
3133 max_snk_mv = pdo_fixed_voltage(pdo);
3134 min_snk_mv = max_snk_mv;
3135 break;
3136 case PDO_TYPE_BATT:
3137 case PDO_TYPE_VAR:
3138 max_snk_mv = pdo_max_voltage(pdo);
3139 min_snk_mv = pdo_min_voltage(pdo);
3140 break;
3141 case PDO_TYPE_APDO:
3142 continue;
3143 default:
3144 tcpm_log(port, "Invalid sink PDO type, ignoring");
3145 continue;
3146 }
3147
3148 if (max_src_mv <= max_snk_mv &&
3149 min_src_mv >= min_snk_mv) {
3150
3151 if ((src_mw == max_mw && min_src_mv > max_mv) ||
3152 src_mw > max_mw) {
3153 *src_pdo = i;
3154 *sink_pdo = j;
3155 max_mw = src_mw;
3156 max_mv = min_src_mv;
3157 ret = 0;
3158 }
3159 }
3160 }
3161 }
3162
3163 return ret;
3164}
3165
3166#define min_pps_apdo_current(x, y) \
3167 min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y))
3168
3169static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port)
3170{
3171 unsigned int i, j, max_mw = 0, max_mv = 0;
3172 unsigned int min_src_mv, max_src_mv, src_ma, src_mw;
3173 unsigned int min_snk_mv, max_snk_mv;
3174 unsigned int max_op_mv;
3175 u32 pdo, src, snk;
3176 unsigned int src_pdo = 0, snk_pdo = 0;
3177
3178
3179
3180
3181
3182
3183 for (i = 1; i < port->nr_source_caps; ++i) {
3184 pdo = port->source_caps[i];
3185
3186 switch (pdo_type(pdo)) {
3187 case PDO_TYPE_APDO:
3188 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
3189 tcpm_log(port, "Not PPS APDO (source), ignoring");
3190 continue;
3191 }
3192
3193 min_src_mv = pdo_pps_apdo_min_voltage(pdo);
3194 max_src_mv = pdo_pps_apdo_max_voltage(pdo);
3195 src_ma = pdo_pps_apdo_max_current(pdo);
3196 src_mw = (src_ma * max_src_mv) / 1000;
3197
3198
3199
3200
3201
3202
3203 for (j = 1; j < port->nr_snk_pdo; j++) {
3204 pdo = port->snk_pdo[j];
3205
3206 switch (pdo_type(pdo)) {
3207 case PDO_TYPE_APDO:
3208 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
3209 tcpm_log(port,
3210 "Not PPS APDO (sink), ignoring");
3211 continue;
3212 }
3213
3214 min_snk_mv =
3215 pdo_pps_apdo_min_voltage(pdo);
3216 max_snk_mv =
3217 pdo_pps_apdo_max_voltage(pdo);
3218 break;
3219 default:
3220 tcpm_log(port,
3221 "Not APDO type (sink), ignoring");
3222 continue;
3223 }
3224
3225 if (min_src_mv <= max_snk_mv &&
3226 max_src_mv >= min_snk_mv) {
3227 max_op_mv = min(max_src_mv, max_snk_mv);
3228 src_mw = (max_op_mv * src_ma) / 1000;
3229
3230 if ((src_mw == max_mw &&
3231 max_op_mv > max_mv) ||
3232 src_mw > max_mw) {
3233 src_pdo = i;
3234 snk_pdo = j;
3235 max_mw = src_mw;
3236 max_mv = max_op_mv;
3237 }
3238 }
3239 }
3240
3241 break;
3242 default:
3243 tcpm_log(port, "Not APDO type (source), ignoring");
3244 continue;
3245 }
3246 }
3247
3248 if (src_pdo) {
3249 src = port->source_caps[src_pdo];
3250 snk = port->snk_pdo[snk_pdo];
3251
3252 port->pps_data.req_min_volt = max(pdo_pps_apdo_min_voltage(src),
3253 pdo_pps_apdo_min_voltage(snk));
3254 port->pps_data.req_max_volt = min(pdo_pps_apdo_max_voltage(src),
3255 pdo_pps_apdo_max_voltage(snk));
3256 port->pps_data.req_max_curr = min_pps_apdo_current(src, snk);
3257 port->pps_data.req_out_volt = min(port->pps_data.req_max_volt,
3258 max(port->pps_data.req_min_volt,
3259 port->pps_data.req_out_volt));
3260 port->pps_data.req_op_curr = min(port->pps_data.req_max_curr,
3261 port->pps_data.req_op_curr);
3262 }
3263
3264 return src_pdo;
3265}
3266
3267static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo)
3268{
3269 unsigned int mv, ma, mw, flags;
3270 unsigned int max_ma, max_mw;
3271 enum pd_pdo_type type;
3272 u32 pdo, matching_snk_pdo;
3273 int src_pdo_index = 0;
3274 int snk_pdo_index = 0;
3275 int ret;
3276
3277 ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index);
3278 if (ret < 0)
3279 return ret;
3280
3281 pdo = port->source_caps[src_pdo_index];
3282 matching_snk_pdo = port->snk_pdo[snk_pdo_index];
3283 type = pdo_type(pdo);
3284
3285 switch (type) {
3286 case PDO_TYPE_FIXED:
3287 mv = pdo_fixed_voltage(pdo);
3288 break;
3289 case PDO_TYPE_BATT:
3290 case PDO_TYPE_VAR:
3291 mv = pdo_min_voltage(pdo);
3292 break;
3293 default:
3294 tcpm_log(port, "Invalid PDO selected!");
3295 return -EINVAL;
3296 }
3297
3298
3299 if (type == PDO_TYPE_BATT) {
3300 mw = min_power(pdo, matching_snk_pdo);
3301 ma = 1000 * mw / mv;
3302 } else {
3303 ma = min_current(pdo, matching_snk_pdo);
3304 mw = ma * mv / 1000;
3305 }
3306
3307 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
3308
3309
3310 max_ma = ma;
3311 max_mw = mw;
3312 if (mw < port->operating_snk_mw) {
3313 flags |= RDO_CAP_MISMATCH;
3314 if (type == PDO_TYPE_BATT &&
3315 (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo)))
3316 max_mw = pdo_max_power(matching_snk_pdo);
3317 else if (pdo_max_current(matching_snk_pdo) >
3318 pdo_max_current(pdo))
3319 max_ma = pdo_max_current(matching_snk_pdo);
3320 }
3321
3322 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
3323 port->cc_req, port->cc1, port->cc2, port->vbus_source,
3324 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
3325 port->polarity);
3326
3327 if (type == PDO_TYPE_BATT) {
3328 *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags);
3329
3330 tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s",
3331 src_pdo_index, mv, mw,
3332 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
3333 } else {
3334 *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags);
3335
3336 tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s",
3337 src_pdo_index, mv, ma,
3338 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
3339 }
3340
3341 port->req_current_limit = ma;
3342 port->req_supply_voltage = mv;
3343
3344 return 0;
3345}
3346
3347static int tcpm_pd_send_request(struct tcpm_port *port)
3348{
3349 struct pd_message msg;
3350 int ret;
3351 u32 rdo;
3352
3353 ret = tcpm_pd_build_request(port, &rdo);
3354 if (ret < 0)
3355 return ret;
3356
3357
3358
3359
3360
3361 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, 0);
3362
3363 memset(&msg, 0, sizeof(msg));
3364 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
3365 port->pwr_role,
3366 port->data_role,
3367 port->negotiated_rev,
3368 port->message_id, 1);
3369 msg.payload[0] = cpu_to_le32(rdo);
3370
3371 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
3372}
3373
3374static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo)
3375{
3376 unsigned int out_mv, op_ma, op_mw, max_mv, max_ma, flags;
3377 enum pd_pdo_type type;
3378 unsigned int src_pdo_index;
3379 u32 pdo;
3380
3381 src_pdo_index = tcpm_pd_select_pps_apdo(port);
3382 if (!src_pdo_index)
3383 return -EOPNOTSUPP;
3384
3385 pdo = port->source_caps[src_pdo_index];
3386 type = pdo_type(pdo);
3387
3388 switch (type) {
3389 case PDO_TYPE_APDO:
3390 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
3391 tcpm_log(port, "Invalid APDO selected!");
3392 return -EINVAL;
3393 }
3394 max_mv = port->pps_data.req_max_volt;
3395 max_ma = port->pps_data.req_max_curr;
3396 out_mv = port->pps_data.req_out_volt;
3397 op_ma = port->pps_data.req_op_curr;
3398 break;
3399 default:
3400 tcpm_log(port, "Invalid PDO selected!");
3401 return -EINVAL;
3402 }
3403
3404 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
3405
3406 op_mw = (op_ma * out_mv) / 1000;
3407 if (op_mw < port->operating_snk_mw) {
3408
3409
3410
3411
3412
3413
3414 op_ma = (port->operating_snk_mw * 1000) / out_mv;
3415 if ((port->operating_snk_mw * 1000) % out_mv)
3416 ++op_ma;
3417 op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP);
3418
3419 if (op_ma > max_ma) {
3420 op_ma = max_ma;
3421 out_mv = (port->operating_snk_mw * 1000) / op_ma;
3422 if ((port->operating_snk_mw * 1000) % op_ma)
3423 ++out_mv;
3424 out_mv += RDO_PROG_VOLT_MV_STEP -
3425 (out_mv % RDO_PROG_VOLT_MV_STEP);
3426
3427 if (out_mv > max_mv) {
3428 tcpm_log(port, "Invalid PPS APDO selected!");
3429 return -EINVAL;
3430 }
3431 }
3432 }
3433
3434 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
3435 port->cc_req, port->cc1, port->cc2, port->vbus_source,
3436 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
3437 port->polarity);
3438
3439 *rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags);
3440
3441 tcpm_log(port, "Requesting APDO %d: %u mV, %u mA",
3442 src_pdo_index, out_mv, op_ma);
3443
3444 port->pps_data.req_op_curr = op_ma;
3445 port->pps_data.req_out_volt = out_mv;
3446
3447 return 0;
3448}
3449
3450static int tcpm_pd_send_pps_request(struct tcpm_port *port)
3451{
3452 struct pd_message msg;
3453 int ret;
3454 u32 rdo;
3455
3456 ret = tcpm_pd_build_pps_request(port, &rdo);
3457 if (ret < 0)
3458 return ret;
3459
3460
3461 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, 0);
3462
3463 memset(&msg, 0, sizeof(msg));
3464 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
3465 port->pwr_role,
3466 port->data_role,
3467 port->negotiated_rev,
3468 port->message_id, 1);
3469 msg.payload[0] = cpu_to_le32(rdo);
3470
3471 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
3472}
3473
3474static int tcpm_set_vbus(struct tcpm_port *port, bool enable)
3475{
3476 int ret;
3477
3478 if (enable && port->vbus_charge)
3479 return -EINVAL;
3480
3481 tcpm_log(port, "vbus:=%d charge=%d", enable, port->vbus_charge);
3482
3483 ret = port->tcpc->set_vbus(port->tcpc, enable, port->vbus_charge);
3484 if (ret < 0)
3485 return ret;
3486
3487 port->vbus_source = enable;
3488 return 0;
3489}
3490
3491static int tcpm_set_charge(struct tcpm_port *port, bool charge)
3492{
3493 int ret;
3494
3495 if (charge && port->vbus_source)
3496 return -EINVAL;
3497
3498 if (charge != port->vbus_charge) {
3499 tcpm_log(port, "vbus=%d charge:=%d", port->vbus_source, charge);
3500 ret = port->tcpc->set_vbus(port->tcpc, port->vbus_source,
3501 charge);
3502 if (ret < 0)
3503 return ret;
3504 }
3505 port->vbus_charge = charge;
3506 power_supply_changed(port->psy);
3507 return 0;
3508}
3509
3510static bool tcpm_start_toggling(struct tcpm_port *port, enum typec_cc_status cc)
3511{
3512 int ret;
3513
3514 if (!port->tcpc->start_toggling)
3515 return false;
3516
3517 tcpm_log_force(port, "Start toggling");
3518 ret = port->tcpc->start_toggling(port->tcpc, port->port_type, cc);
3519 return ret == 0;
3520}
3521
3522static int tcpm_init_vbus(struct tcpm_port *port)
3523{
3524 int ret;
3525
3526 ret = port->tcpc->set_vbus(port->tcpc, false, false);
3527 port->vbus_source = false;
3528 port->vbus_charge = false;
3529 return ret;
3530}
3531
3532static int tcpm_init_vconn(struct tcpm_port *port)
3533{
3534 int ret;
3535
3536 ret = port->tcpc->set_vconn(port->tcpc, false);
3537 port->vconn_role = TYPEC_SINK;
3538 return ret;
3539}
3540
3541static void tcpm_typec_connect(struct tcpm_port *port)
3542{
3543 if (!port->connected) {
3544
3545 memset(&port->partner_ident, 0, sizeof(port->partner_ident));
3546 port->partner_desc.usb_pd = port->pd_capable;
3547 if (tcpm_port_is_debug(port))
3548 port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG;
3549 else if (tcpm_port_is_audio(port))
3550 port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO;
3551 else
3552 port->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
3553 port->partner = typec_register_partner(port->typec_port,
3554 &port->partner_desc);
3555 port->connected = true;
3556 }
3557}
3558
3559static int tcpm_src_attach(struct tcpm_port *port)
3560{
3561 enum typec_cc_polarity polarity =
3562 port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2
3563 : TYPEC_POLARITY_CC1;
3564 int ret;
3565
3566 if (port->attached)
3567 return 0;
3568
3569 ret = tcpm_set_polarity(port, polarity);
3570 if (ret < 0)
3571 return ret;
3572
3573 tcpm_enable_auto_vbus_discharge(port, true);
3574
3575 ret = tcpm_set_roles(port, true, TYPEC_SOURCE, tcpm_data_role_for_source(port));
3576 if (ret < 0)
3577 return ret;
3578
3579 if (port->pd_supported) {
3580 ret = port->tcpc->set_pd_rx(port->tcpc, true);
3581 if (ret < 0)
3582 goto out_disable_mux;
3583 }
3584
3585
3586
3587
3588
3589
3590 if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) ||
3591 (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) {
3592 ret = tcpm_set_vconn(port, true);
3593 if (ret < 0)
3594 goto out_disable_pd;
3595 }
3596
3597 ret = tcpm_set_vbus(port, true);
3598 if (ret < 0)
3599 goto out_disable_vconn;
3600
3601 port->pd_capable = false;
3602
3603 port->partner = NULL;
3604
3605 port->attached = true;
3606 port->send_discover = true;
3607
3608 return 0;
3609
3610out_disable_vconn:
3611 tcpm_set_vconn(port, false);
3612out_disable_pd:
3613 if (port->pd_supported)
3614 port->tcpc->set_pd_rx(port->tcpc, false);
3615out_disable_mux:
3616 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
3617 TYPEC_ORIENTATION_NONE);
3618 return ret;
3619}
3620
3621static void tcpm_typec_disconnect(struct tcpm_port *port)
3622{
3623 if (port->connected) {
3624 typec_unregister_partner(port->partner);
3625 port->partner = NULL;
3626 port->connected = false;
3627 }
3628}
3629
3630static void tcpm_unregister_altmodes(struct tcpm_port *port)
3631{
3632 struct pd_mode_data *modep = &port->mode_data;
3633 int i;
3634
3635 for (i = 0; i < modep->altmodes; i++) {
3636 typec_unregister_altmode(port->partner_altmode[i]);
3637 port->partner_altmode[i] = NULL;
3638 }
3639
3640 memset(modep, 0, sizeof(*modep));
3641}
3642
3643static void tcpm_set_partner_usb_comm_capable(struct tcpm_port *port, bool capable)
3644{
3645 tcpm_log(port, "Setting usb_comm capable %s", capable ? "true" : "false");
3646
3647 if (port->tcpc->set_partner_usb_comm_capable)
3648 port->tcpc->set_partner_usb_comm_capable(port->tcpc, capable);
3649}
3650
3651static void tcpm_reset_port(struct tcpm_port *port)
3652{
3653 tcpm_enable_auto_vbus_discharge(port, false);
3654 port->in_ams = false;
3655 port->ams = NONE_AMS;
3656 port->vdm_sm_running = false;
3657 tcpm_unregister_altmodes(port);
3658 tcpm_typec_disconnect(port);
3659 port->attached = false;
3660 port->pd_capable = false;
3661 port->pps_data.supported = false;
3662 tcpm_set_partner_usb_comm_capable(port, false);
3663
3664
3665
3666
3667
3668 port->rx_msgid = -1;
3669
3670 port->tcpc->set_pd_rx(port->tcpc, false);
3671 tcpm_init_vbus(port);
3672 tcpm_init_vconn(port);
3673 tcpm_set_current_limit(port, 0, 0);
3674 tcpm_set_polarity(port, TYPEC_POLARITY_CC1);
3675 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
3676 TYPEC_ORIENTATION_NONE);
3677 tcpm_set_attached_state(port, false);
3678 port->try_src_count = 0;
3679 port->try_snk_count = 0;
3680 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
3681 power_supply_changed(port->psy);
3682 port->nr_sink_caps = 0;
3683 port->sink_cap_done = false;
3684 if (port->tcpc->enable_frs)
3685 port->tcpc->enable_frs(port->tcpc, false);
3686}
3687
3688static void tcpm_detach(struct tcpm_port *port)
3689{
3690 if (tcpm_port_is_disconnected(port))
3691 port->hard_reset_count = 0;
3692
3693 if (!port->attached)
3694 return;
3695
3696 if (port->tcpc->set_bist_data) {
3697 tcpm_log(port, "disable BIST MODE TESTDATA");
3698 port->tcpc->set_bist_data(port->tcpc, false);
3699 }
3700
3701 tcpm_reset_port(port);
3702}
3703
3704static void tcpm_src_detach(struct tcpm_port *port)
3705{
3706 tcpm_detach(port);
3707}
3708
3709static int tcpm_snk_attach(struct tcpm_port *port)
3710{
3711 int ret;
3712
3713 if (port->attached)
3714 return 0;
3715
3716 ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ?
3717 TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1);
3718 if (ret < 0)
3719 return ret;
3720
3721 tcpm_enable_auto_vbus_discharge(port, true);
3722
3723 ret = tcpm_set_roles(port, true, TYPEC_SINK, tcpm_data_role_for_sink(port));
3724 if (ret < 0)
3725 return ret;
3726
3727 port->pd_capable = false;
3728
3729 port->partner = NULL;
3730
3731 port->attached = true;
3732 port->send_discover = true;
3733
3734 return 0;
3735}
3736
3737static void tcpm_snk_detach(struct tcpm_port *port)
3738{
3739 tcpm_detach(port);
3740}
3741
3742static int tcpm_acc_attach(struct tcpm_port *port)
3743{
3744 int ret;
3745
3746 if (port->attached)
3747 return 0;
3748
3749 ret = tcpm_set_roles(port, true, TYPEC_SOURCE,
3750 tcpm_data_role_for_source(port));
3751 if (ret < 0)
3752 return ret;
3753
3754 port->partner = NULL;
3755
3756 tcpm_typec_connect(port);
3757
3758 port->attached = true;
3759
3760 return 0;
3761}
3762
3763static void tcpm_acc_detach(struct tcpm_port *port)
3764{
3765 tcpm_detach(port);
3766}
3767
3768static inline enum tcpm_state hard_reset_state(struct tcpm_port *port)
3769{
3770 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)
3771 return HARD_RESET_SEND;
3772 if (port->pd_capable)
3773 return ERROR_RECOVERY;
3774 if (port->pwr_role == TYPEC_SOURCE)
3775 return SRC_UNATTACHED;
3776 if (port->state == SNK_WAIT_CAPABILITIES)
3777 return SNK_READY;
3778 return SNK_UNATTACHED;
3779}
3780
3781static inline enum tcpm_state unattached_state(struct tcpm_port *port)
3782{
3783 if (port->port_type == TYPEC_PORT_DRP) {
3784 if (port->pwr_role == TYPEC_SOURCE)
3785 return SRC_UNATTACHED;
3786 else
3787 return SNK_UNATTACHED;
3788 } else if (port->port_type == TYPEC_PORT_SRC) {
3789 return SRC_UNATTACHED;
3790 }
3791
3792 return SNK_UNATTACHED;
3793}
3794
3795static void tcpm_swap_complete(struct tcpm_port *port, int result)
3796{
3797 if (port->swap_pending) {
3798 port->swap_status = result;
3799 port->swap_pending = false;
3800 port->non_pd_role_swap = false;
3801 complete(&port->swap_complete);
3802 }
3803}
3804
3805static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc)
3806{
3807 switch (cc) {
3808 case TYPEC_CC_RP_1_5:
3809 return TYPEC_PWR_MODE_1_5A;
3810 case TYPEC_CC_RP_3_0:
3811 return TYPEC_PWR_MODE_3_0A;
3812 case TYPEC_CC_RP_DEF:
3813 default:
3814 return TYPEC_PWR_MODE_USB;
3815 }
3816}
3817
3818static enum typec_cc_status tcpm_pwr_opmode_to_rp(enum typec_pwr_opmode opmode)
3819{
3820 switch (opmode) {
3821 case TYPEC_PWR_MODE_USB:
3822 return TYPEC_CC_RP_DEF;
3823 case TYPEC_PWR_MODE_1_5A:
3824 return TYPEC_CC_RP_1_5;
3825 case TYPEC_PWR_MODE_3_0A:
3826 case TYPEC_PWR_MODE_PD:
3827 default:
3828 return TYPEC_CC_RP_3_0;
3829 }
3830}
3831
3832static void run_state_machine(struct tcpm_port *port)
3833{
3834 int ret;
3835 enum typec_pwr_opmode opmode;
3836 unsigned int msecs;
3837 enum tcpm_state upcoming_state;
3838
3839 port->enter_state = port->state;
3840 switch (port->state) {
3841 case TOGGLING:
3842 break;
3843
3844 case SRC_UNATTACHED:
3845 if (!port->non_pd_role_swap)
3846 tcpm_swap_complete(port, -ENOTCONN);
3847 tcpm_src_detach(port);
3848 if (tcpm_start_toggling(port, tcpm_rp_cc(port))) {
3849 tcpm_set_state(port, TOGGLING, 0);
3850 break;
3851 }
3852 tcpm_set_cc(port, tcpm_rp_cc(port));
3853 if (port->port_type == TYPEC_PORT_DRP)
3854 tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK);
3855 break;
3856 case SRC_ATTACH_WAIT:
3857 if (tcpm_port_is_debug(port))
3858 tcpm_set_state(port, DEBUG_ACC_ATTACHED,
3859 PD_T_CC_DEBOUNCE);
3860 else if (tcpm_port_is_audio(port))
3861 tcpm_set_state(port, AUDIO_ACC_ATTACHED,
3862 PD_T_CC_DEBOUNCE);
3863 else if (tcpm_port_is_source(port) && port->vbus_vsafe0v)
3864 tcpm_set_state(port,
3865 tcpm_try_snk(port) ? SNK_TRY
3866 : SRC_ATTACHED,
3867 PD_T_CC_DEBOUNCE);
3868 break;
3869
3870 case SNK_TRY:
3871 port->try_snk_count++;
3872
3873
3874
3875
3876
3877
3878
3879
3880 tcpm_set_cc(port, TYPEC_CC_RD);
3881 tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY);
3882 break;
3883 case SNK_TRY_WAIT:
3884 if (tcpm_port_is_sink(port)) {
3885 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0);
3886 } else {
3887 tcpm_set_state(port, SRC_TRYWAIT, 0);
3888 port->max_wait = 0;
3889 }
3890 break;
3891 case SNK_TRY_WAIT_DEBOUNCE:
3892 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS,
3893 PD_T_TRY_CC_DEBOUNCE);
3894 break;
3895 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
3896 if (port->vbus_present && tcpm_port_is_sink(port))
3897 tcpm_set_state(port, SNK_ATTACHED, 0);
3898 else
3899 port->max_wait = 0;
3900 break;
3901 case SRC_TRYWAIT:
3902 tcpm_set_cc(port, tcpm_rp_cc(port));
3903 if (port->max_wait == 0) {
3904 port->max_wait = jiffies +
3905 msecs_to_jiffies(PD_T_DRP_TRY);
3906 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
3907 PD_T_DRP_TRY);
3908 } else {
3909 if (time_is_after_jiffies(port->max_wait))
3910 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
3911 jiffies_to_msecs(port->max_wait -
3912 jiffies));
3913 else
3914 tcpm_set_state(port, SNK_UNATTACHED, 0);
3915 }
3916 break;
3917 case SRC_TRYWAIT_DEBOUNCE:
3918 tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE);
3919 break;
3920 case SRC_TRYWAIT_UNATTACHED:
3921 tcpm_set_state(port, SNK_UNATTACHED, 0);
3922 break;
3923
3924 case SRC_ATTACHED:
3925 ret = tcpm_src_attach(port);
3926 tcpm_set_state(port, SRC_UNATTACHED,
3927 ret < 0 ? 0 : PD_T_PS_SOURCE_ON);
3928 break;
3929 case SRC_STARTUP:
3930 opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port));
3931 typec_set_pwr_opmode(port->typec_port, opmode);
3932 port->pwr_opmode = TYPEC_PWR_MODE_USB;
3933 port->caps_count = 0;
3934 port->negotiated_rev = PD_MAX_REV;
3935 port->message_id = 0;
3936 port->rx_msgid = -1;
3937 port->explicit_contract = false;
3938
3939 if (port->ams == POWER_ROLE_SWAP ||
3940 port->ams == FAST_ROLE_SWAP)
3941 tcpm_ams_finish(port);
3942 if (!port->pd_supported) {
3943 tcpm_set_state(port, SRC_READY, 0);
3944 break;
3945 }
3946 port->upcoming_state = SRC_SEND_CAPABILITIES;
3947 tcpm_ams_start(port, POWER_NEGOTIATION);
3948 break;
3949 case SRC_SEND_CAPABILITIES:
3950 port->caps_count++;
3951 if (port->caps_count > PD_N_CAPS_COUNT) {
3952 tcpm_set_state(port, SRC_READY, 0);
3953 break;
3954 }
3955 ret = tcpm_pd_send_source_caps(port);
3956 if (ret < 0) {
3957 tcpm_set_state(port, SRC_SEND_CAPABILITIES,
3958 PD_T_SEND_SOURCE_CAP);
3959 } else {
3960
3961
3962
3963
3964
3965
3966 port->caps_count = 0;
3967 port->pd_capable = true;
3968 tcpm_set_state_cond(port, SRC_SEND_CAPABILITIES_TIMEOUT,
3969 PD_T_SEND_SOURCE_CAP);
3970 }
3971 break;
3972 case SRC_SEND_CAPABILITIES_TIMEOUT:
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) {
3987 tcpm_set_state(port, HARD_RESET_SEND, 0);
3988 } else if (port->negotiated_rev > PD_REV20) {
3989 port->negotiated_rev--;
3990 port->hard_reset_count = 0;
3991 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
3992 } else {
3993 tcpm_set_state(port, hard_reset_state(port), 0);
3994 }
3995 break;
3996 case SRC_NEGOTIATE_CAPABILITIES:
3997 ret = tcpm_pd_check_request(port);
3998 if (ret < 0) {
3999 tcpm_pd_send_control(port, PD_CTRL_REJECT);
4000 if (!port->explicit_contract) {
4001 tcpm_set_state(port,
4002 SRC_WAIT_NEW_CAPABILITIES, 0);
4003 } else {
4004 tcpm_set_state(port, SRC_READY, 0);
4005 }
4006 } else {
4007 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
4008 tcpm_set_partner_usb_comm_capable(port,
4009 !!(port->sink_request & RDO_USB_COMM));
4010 tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
4011 PD_T_SRC_TRANSITION);
4012 }
4013 break;
4014 case SRC_TRANSITION_SUPPLY:
4015
4016 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
4017 port->explicit_contract = true;
4018 typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD);
4019 port->pwr_opmode = TYPEC_PWR_MODE_PD;
4020 tcpm_set_state_cond(port, SRC_READY, 0);
4021 break;
4022 case SRC_READY:
4023#if 1
4024 port->hard_reset_count = 0;
4025#endif
4026 port->try_src_count = 0;
4027
4028 tcpm_swap_complete(port, 0);
4029 tcpm_typec_connect(port);
4030
4031 if (port->ams != NONE_AMS)
4032 tcpm_ams_finish(port);
4033 if (port->next_ams != NONE_AMS) {
4034 port->ams = port->next_ams;
4035 port->next_ams = NONE_AMS;
4036 }
4037
4038
4039
4040
4041
4042 if (port->upcoming_state != INVALID_STATE) {
4043 upcoming_state = port->upcoming_state;
4044 port->upcoming_state = INVALID_STATE;
4045 tcpm_set_state(port, upcoming_state, 0);
4046 break;
4047 }
4048
4049
4050
4051
4052
4053
4054
4055
4056 if (port->explicit_contract)
4057 mod_send_discover_delayed_work(port, 0);
4058 else
4059 port->send_discover = false;
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074 break;
4075 case SRC_WAIT_NEW_CAPABILITIES:
4076
4077 break;
4078
4079
4080 case SNK_UNATTACHED:
4081 if (!port->non_pd_role_swap)
4082 tcpm_swap_complete(port, -ENOTCONN);
4083 tcpm_pps_complete(port, -ENOTCONN);
4084 tcpm_snk_detach(port);
4085 if (tcpm_start_toggling(port, TYPEC_CC_RD)) {
4086 tcpm_set_state(port, TOGGLING, 0);
4087 break;
4088 }
4089 tcpm_set_cc(port, TYPEC_CC_RD);
4090 if (port->port_type == TYPEC_PORT_DRP)
4091 tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC);
4092 break;
4093 case SNK_ATTACH_WAIT:
4094 if ((port->cc1 == TYPEC_CC_OPEN &&
4095 port->cc2 != TYPEC_CC_OPEN) ||
4096 (port->cc1 != TYPEC_CC_OPEN &&
4097 port->cc2 == TYPEC_CC_OPEN))
4098 tcpm_set_state(port, SNK_DEBOUNCED,
4099 PD_T_CC_DEBOUNCE);
4100 else if (tcpm_port_is_disconnected(port))
4101 tcpm_set_state(port, SNK_UNATTACHED,
4102 PD_T_PD_DEBOUNCE);
4103 break;
4104 case SNK_DEBOUNCED:
4105 if (tcpm_port_is_disconnected(port))
4106 tcpm_set_state(port, SNK_UNATTACHED,
4107 PD_T_PD_DEBOUNCE);
4108 else if (port->vbus_present)
4109 tcpm_set_state(port,
4110 tcpm_try_src(port) ? SRC_TRY
4111 : SNK_ATTACHED,
4112 0);
4113 else
4114
4115 tcpm_set_state(port, PORT_RESET, PD_T_PS_SOURCE_ON);
4116 break;
4117
4118 case SRC_TRY:
4119 port->try_src_count++;
4120 tcpm_set_cc(port, tcpm_rp_cc(port));
4121 port->max_wait = 0;
4122 tcpm_set_state(port, SRC_TRY_WAIT, 0);
4123 break;
4124 case SRC_TRY_WAIT:
4125 if (port->max_wait == 0) {
4126 port->max_wait = jiffies +
4127 msecs_to_jiffies(PD_T_DRP_TRY);
4128 msecs = PD_T_DRP_TRY;
4129 } else {
4130 if (time_is_after_jiffies(port->max_wait))
4131 msecs = jiffies_to_msecs(port->max_wait -
4132 jiffies);
4133 else
4134 msecs = 0;
4135 }
4136 tcpm_set_state(port, SNK_TRYWAIT, msecs);
4137 break;
4138 case SRC_TRY_DEBOUNCE:
4139 tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE);
4140 break;
4141 case SNK_TRYWAIT:
4142 tcpm_set_cc(port, TYPEC_CC_RD);
4143 tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE);
4144 break;
4145 case SNK_TRYWAIT_VBUS:
4146
4147
4148
4149
4150
4151 if (port->vbus_present && tcpm_port_is_sink(port)) {
4152 tcpm_set_state(port, SNK_ATTACHED, 0);
4153 break;
4154 }
4155 if (!tcpm_port_is_sink(port))
4156 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
4157 break;
4158 case SNK_TRYWAIT_DEBOUNCE:
4159 tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE);
4160 break;
4161 case SNK_ATTACHED:
4162 ret = tcpm_snk_attach(port);
4163 if (ret < 0)
4164 tcpm_set_state(port, SNK_UNATTACHED, 0);
4165 else
4166 tcpm_set_state(port, SNK_STARTUP, 0);
4167 break;
4168 case SNK_STARTUP:
4169 opmode = tcpm_get_pwr_opmode(port->polarity ?
4170 port->cc2 : port->cc1);
4171 typec_set_pwr_opmode(port->typec_port, opmode);
4172 port->pwr_opmode = TYPEC_PWR_MODE_USB;
4173 port->negotiated_rev = PD_MAX_REV;
4174 port->message_id = 0;
4175 port->rx_msgid = -1;
4176 port->explicit_contract = false;
4177
4178 if (port->ams == POWER_ROLE_SWAP ||
4179 port->ams == FAST_ROLE_SWAP)
4180
4181 tcpm_ams_finish(port);
4182
4183 tcpm_set_state(port, SNK_DISCOVERY, 0);
4184 break;
4185 case SNK_DISCOVERY:
4186 if (port->vbus_present) {
4187 u32 current_lim = tcpm_get_current_limit(port);
4188
4189 if (port->slow_charger_loop && (current_lim > PD_P_SNK_STDBY_MW / 5))
4190 current_lim = PD_P_SNK_STDBY_MW / 5;
4191 tcpm_set_current_limit(port, current_lim, 5000);
4192 tcpm_set_charge(port, true);
4193 if (!port->pd_supported)
4194 tcpm_set_state(port, SNK_READY, 0);
4195 else
4196 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
4197 break;
4198 }
4199
4200
4201
4202
4203
4204 tcpm_set_state(port, hard_reset_state(port),
4205 port->port_type == TYPEC_PORT_DRP ?
4206 PD_T_DB_DETECT : PD_T_NO_RESPONSE);
4207 break;
4208 case SNK_DISCOVERY_DEBOUNCE:
4209 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE,
4210 PD_T_CC_DEBOUNCE);
4211 break;
4212 case SNK_DISCOVERY_DEBOUNCE_DONE:
4213 if (!tcpm_port_is_disconnected(port) &&
4214 tcpm_port_is_sink(port) &&
4215 ktime_after(port->delayed_runtime, ktime_get())) {
4216 tcpm_set_state(port, SNK_DISCOVERY,
4217 ktime_to_ms(ktime_sub(port->delayed_runtime, ktime_get())));
4218 break;
4219 }
4220 tcpm_set_state(port, unattached_state(port), 0);
4221 break;
4222 case SNK_WAIT_CAPABILITIES:
4223 ret = port->tcpc->set_pd_rx(port->tcpc, true);
4224 if (ret < 0) {
4225 tcpm_set_state(port, SNK_READY, 0);
4226 break;
4227 }
4228
4229
4230
4231
4232
4233
4234 if (port->vbus_never_low) {
4235 port->vbus_never_low = false;
4236 tcpm_set_state(port, SNK_SOFT_RESET,
4237 PD_T_SINK_WAIT_CAP);
4238 } else {
4239 tcpm_set_state(port, hard_reset_state(port),
4240 PD_T_SINK_WAIT_CAP);
4241 }
4242 break;
4243 case SNK_NEGOTIATE_CAPABILITIES:
4244 port->pd_capable = true;
4245 tcpm_set_partner_usb_comm_capable(port,
4246 !!(port->source_caps[0] & PDO_FIXED_USB_COMM));
4247 port->hard_reset_count = 0;
4248 ret = tcpm_pd_send_request(port);
4249 if (ret < 0) {
4250
4251 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD,
4252 port->pps_data.active,
4253 port->supply_voltage);
4254
4255 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
4256 } else {
4257 tcpm_set_state_cond(port, hard_reset_state(port),
4258 PD_T_SENDER_RESPONSE);
4259 }
4260 break;
4261 case SNK_NEGOTIATE_PPS_CAPABILITIES:
4262 ret = tcpm_pd_send_pps_request(port);
4263 if (ret < 0) {
4264
4265 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD,
4266 port->pps_data.active,
4267 port->supply_voltage);
4268 port->pps_status = ret;
4269
4270
4271
4272
4273
4274 if (port->update_sink_caps)
4275 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
4276 else
4277 tcpm_set_state(port, SNK_READY, 0);
4278 } else {
4279 tcpm_set_state_cond(port, hard_reset_state(port),
4280 PD_T_SENDER_RESPONSE);
4281 }
4282 break;
4283 case SNK_TRANSITION_SINK:
4284
4285
4286
4287
4288
4289
4290
4291
4292 if (port->supply_voltage != port->req_supply_voltage && !port->pps_data.active &&
4293 port->current_limit * port->supply_voltage / 1000 > PD_P_SNK_STDBY_MW) {
4294 u32 stdby_ma = PD_P_SNK_STDBY_MW * 1000 / port->supply_voltage;
4295
4296 tcpm_log(port, "Setting standby current %u mV @ %u mA",
4297 port->supply_voltage, stdby_ma);
4298 tcpm_set_current_limit(port, stdby_ma, port->supply_voltage);
4299 }
4300 fallthrough;
4301 case SNK_TRANSITION_SINK_VBUS:
4302 tcpm_set_state(port, hard_reset_state(port),
4303 PD_T_PS_TRANSITION);
4304 break;
4305 case SNK_READY:
4306 port->try_snk_count = 0;
4307 port->update_sink_caps = false;
4308 if (port->explicit_contract) {
4309 typec_set_pwr_opmode(port->typec_port,
4310 TYPEC_PWR_MODE_PD);
4311 port->pwr_opmode = TYPEC_PWR_MODE_PD;
4312 }
4313
4314 if (!port->pd_capable && port->slow_charger_loop)
4315 tcpm_set_current_limit(port, tcpm_get_current_limit(port), 5000);
4316 tcpm_swap_complete(port, 0);
4317 tcpm_typec_connect(port);
4318 mod_enable_frs_delayed_work(port, 0);
4319 tcpm_pps_complete(port, port->pps_status);
4320
4321 if (port->ams != NONE_AMS)
4322 tcpm_ams_finish(port);
4323 if (port->next_ams != NONE_AMS) {
4324 port->ams = port->next_ams;
4325 port->next_ams = NONE_AMS;
4326 }
4327
4328
4329
4330
4331
4332 if (port->upcoming_state != INVALID_STATE) {
4333 upcoming_state = port->upcoming_state;
4334 port->upcoming_state = INVALID_STATE;
4335 tcpm_set_state(port, upcoming_state, 0);
4336 break;
4337 }
4338
4339
4340
4341
4342
4343
4344
4345
4346 if (port->explicit_contract)
4347 mod_send_discover_delayed_work(port, 0);
4348 else
4349 port->send_discover = false;
4350
4351 power_supply_changed(port->psy);
4352 break;
4353
4354
4355 case ACC_UNATTACHED:
4356 tcpm_acc_detach(port);
4357 tcpm_set_state(port, SRC_UNATTACHED, 0);
4358 break;
4359 case DEBUG_ACC_ATTACHED:
4360 case AUDIO_ACC_ATTACHED:
4361 ret = tcpm_acc_attach(port);
4362 if (ret < 0)
4363 tcpm_set_state(port, ACC_UNATTACHED, 0);
4364 break;
4365 case AUDIO_ACC_DEBOUNCE:
4366 tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE);
4367 break;
4368
4369
4370 case HARD_RESET_SEND:
4371 if (port->ams != NONE_AMS)
4372 tcpm_ams_finish(port);
4373
4374
4375
4376
4377 port->upcoming_state = INVALID_STATE;
4378 tcpm_ams_start(port, HARD_RESET);
4379 break;
4380 case HARD_RESET_START:
4381 port->sink_cap_done = false;
4382 if (port->tcpc->enable_frs)
4383 port->tcpc->enable_frs(port->tcpc, false);
4384 port->hard_reset_count++;
4385 port->tcpc->set_pd_rx(port->tcpc, false);
4386 tcpm_unregister_altmodes(port);
4387 port->nr_sink_caps = 0;
4388 port->send_discover = true;
4389 if (port->pwr_role == TYPEC_SOURCE)
4390 tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF,
4391 PD_T_PS_HARD_RESET);
4392 else
4393 tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0);
4394 break;
4395 case SRC_HARD_RESET_VBUS_OFF:
4396
4397
4398
4399
4400
4401
4402 tcpm_set_vconn(port, false);
4403 tcpm_set_vbus(port, false);
4404 tcpm_set_roles(port, port->self_powered, TYPEC_SOURCE,
4405 tcpm_data_role_for_source(port));
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SAFE_0V + PD_T_SRC_RECOVER);
4418 break;
4419 case SRC_HARD_RESET_VBUS_ON:
4420 tcpm_set_vconn(port, true);
4421 tcpm_set_vbus(port, true);
4422 if (port->ams == HARD_RESET)
4423 tcpm_ams_finish(port);
4424 if (port->pd_supported)
4425 port->tcpc->set_pd_rx(port->tcpc, true);
4426 tcpm_set_attached_state(port, true);
4427 tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON);
4428 break;
4429 case SNK_HARD_RESET_SINK_OFF:
4430
4431 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, 0);
4432 memset(&port->pps_data, 0, sizeof(port->pps_data));
4433 tcpm_set_vconn(port, false);
4434 if (port->pd_capable)
4435 tcpm_set_charge(port, false);
4436 tcpm_set_roles(port, port->self_powered, TYPEC_SINK,
4437 tcpm_data_role_for_sink(port));
4438
4439
4440
4441
4442
4443 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V);
4444 break;
4445 case SNK_HARD_RESET_WAIT_VBUS:
4446 if (port->ams == HARD_RESET)
4447 tcpm_ams_finish(port);
4448
4449 tcpm_set_state(port, SNK_UNATTACHED,
4450 PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON);
4451 break;
4452 case SNK_HARD_RESET_SINK_ON:
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469 if (port->pd_capable) {
4470 tcpm_set_current_limit(port,
4471 tcpm_get_current_limit(port),
4472 5000);
4473 tcpm_set_charge(port, true);
4474 }
4475 if (port->ams == HARD_RESET)
4476 tcpm_ams_finish(port);
4477 tcpm_set_attached_state(port, true);
4478 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, VSAFE5V);
4479 tcpm_set_state(port, SNK_STARTUP, 0);
4480 break;
4481
4482
4483 case SOFT_RESET:
4484 port->message_id = 0;
4485 port->rx_msgid = -1;
4486 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
4487 tcpm_ams_finish(port);
4488 if (port->pwr_role == TYPEC_SOURCE) {
4489 port->upcoming_state = SRC_SEND_CAPABILITIES;
4490 tcpm_ams_start(port, POWER_NEGOTIATION);
4491 } else {
4492 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
4493 }
4494 break;
4495 case SRC_SOFT_RESET_WAIT_SNK_TX:
4496 case SNK_SOFT_RESET:
4497 if (port->ams != NONE_AMS)
4498 tcpm_ams_finish(port);
4499 port->upcoming_state = SOFT_RESET_SEND;
4500 tcpm_ams_start(port, SOFT_RESET_AMS);
4501 break;
4502 case SOFT_RESET_SEND:
4503 port->message_id = 0;
4504 port->rx_msgid = -1;
4505 if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET))
4506 tcpm_set_state_cond(port, hard_reset_state(port), 0);
4507 else
4508 tcpm_set_state_cond(port, hard_reset_state(port),
4509 PD_T_SENDER_RESPONSE);
4510 break;
4511
4512
4513 case DR_SWAP_SEND:
4514 tcpm_pd_send_control(port, PD_CTRL_DR_SWAP);
4515 if (port->data_role == TYPEC_DEVICE || port->negotiated_rev > PD_REV20)
4516 port->send_discover = true;
4517 tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT,
4518 PD_T_SENDER_RESPONSE);
4519 break;
4520 case DR_SWAP_ACCEPT:
4521 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
4522 if (port->data_role == TYPEC_DEVICE || port->negotiated_rev > PD_REV20)
4523 port->send_discover = true;
4524 tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0);
4525 break;
4526 case DR_SWAP_SEND_TIMEOUT:
4527 tcpm_swap_complete(port, -ETIMEDOUT);
4528 port->send_discover = false;
4529 tcpm_ams_finish(port);
4530 tcpm_set_state(port, ready_state(port), 0);
4531 break;
4532 case DR_SWAP_CHANGE_DR:
4533 if (port->data_role == TYPEC_HOST) {
4534 tcpm_unregister_altmodes(port);
4535 tcpm_set_roles(port, true, port->pwr_role,
4536 TYPEC_DEVICE);
4537 } else {
4538 tcpm_set_roles(port, true, port->pwr_role,
4539 TYPEC_HOST);
4540 }
4541 tcpm_ams_finish(port);
4542 tcpm_set_state(port, ready_state(port), 0);
4543 break;
4544
4545 case FR_SWAP_SEND:
4546 if (tcpm_pd_send_control(port, PD_CTRL_FR_SWAP)) {
4547 tcpm_set_state(port, ERROR_RECOVERY, 0);
4548 break;
4549 }
4550 tcpm_set_state_cond(port, FR_SWAP_SEND_TIMEOUT, PD_T_SENDER_RESPONSE);
4551 break;
4552 case FR_SWAP_SEND_TIMEOUT:
4553 tcpm_set_state(port, ERROR_RECOVERY, 0);
4554 break;
4555 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
4556 tcpm_set_state(port, ERROR_RECOVERY, PD_T_PS_SOURCE_OFF);
4557 break;
4558 case FR_SWAP_SNK_SRC_NEW_SINK_READY:
4559 if (port->vbus_source)
4560 tcpm_set_state(port, FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED, 0);
4561 else
4562 tcpm_set_state(port, ERROR_RECOVERY, PD_T_RECEIVER_RESPONSE);
4563 break;
4564 case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED:
4565 tcpm_set_pwr_role(port, TYPEC_SOURCE);
4566 if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
4567 tcpm_set_state(port, ERROR_RECOVERY, 0);
4568 break;
4569 }
4570 tcpm_set_cc(port, tcpm_rp_cc(port));
4571 tcpm_set_state(port, SRC_STARTUP, PD_T_SWAP_SRC_START);
4572 break;
4573
4574
4575 case PR_SWAP_ACCEPT:
4576 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
4577 tcpm_set_state(port, PR_SWAP_START, 0);
4578 break;
4579 case PR_SWAP_SEND:
4580 tcpm_pd_send_control(port, PD_CTRL_PR_SWAP);
4581 tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT,
4582 PD_T_SENDER_RESPONSE);
4583 break;
4584 case PR_SWAP_SEND_TIMEOUT:
4585 tcpm_swap_complete(port, -ETIMEDOUT);
4586 tcpm_set_state(port, ready_state(port), 0);
4587 break;
4588 case PR_SWAP_START:
4589 tcpm_apply_rc(port);
4590 if (port->pwr_role == TYPEC_SOURCE)
4591 tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF,
4592 PD_T_SRC_TRANSITION);
4593 else
4594 tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0);
4595 break;
4596 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
4597
4598
4599
4600
4601 tcpm_set_vbus(port, false);
4602 port->explicit_contract = false;
4603
4604 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF,
4605 PD_T_SRCSWAPSTDBY);
4606 break;
4607 case PR_SWAP_SRC_SNK_SOURCE_OFF:
4608 tcpm_set_cc(port, TYPEC_CC_RD);
4609
4610 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED,
4611 PD_T_CC_DEBOUNCE);
4612 break;
4613 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
4614
4615
4616
4617
4618
4619
4620
4621 tcpm_set_pwr_role(port, TYPEC_SINK);
4622 if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
4623 tcpm_set_state(port, ERROR_RECOVERY, 0);
4624 break;
4625 }
4626 tcpm_set_state(port, ERROR_RECOVERY, PD_T_PS_SOURCE_ON_PRS);
4627 break;
4628 case PR_SWAP_SRC_SNK_SINK_ON:
4629 tcpm_enable_auto_vbus_discharge(port, true);
4630
4631 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, VSAFE5V);
4632 tcpm_set_state(port, SNK_STARTUP, 0);
4633 break;
4634 case PR_SWAP_SNK_SRC_SINK_OFF:
4635
4636
4637
4638
4639 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB,
4640 port->pps_data.active, 0);
4641 tcpm_set_charge(port, false);
4642 tcpm_set_state(port, hard_reset_state(port),
4643 PD_T_PS_SOURCE_OFF);
4644 break;
4645 case PR_SWAP_SNK_SRC_SOURCE_ON:
4646 tcpm_enable_auto_vbus_discharge(port, true);
4647 tcpm_set_cc(port, tcpm_rp_cc(port));
4648 tcpm_set_vbus(port, true);
4649
4650
4651
4652
4653
4654 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP,
4655 PD_T_NEWSRC);
4656 break;
4657 case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP:
4658
4659
4660
4661
4662
4663
4664
4665 tcpm_set_pwr_role(port, TYPEC_SOURCE);
4666 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
4667 tcpm_set_state(port, SRC_STARTUP, PD_T_SWAP_SRC_START);
4668 break;
4669
4670 case VCONN_SWAP_ACCEPT:
4671 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
4672 tcpm_ams_finish(port);
4673 tcpm_set_state(port, VCONN_SWAP_START, 0);
4674 break;
4675 case VCONN_SWAP_SEND:
4676 tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP);
4677 tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT,
4678 PD_T_SENDER_RESPONSE);
4679 break;
4680 case VCONN_SWAP_SEND_TIMEOUT:
4681 tcpm_swap_complete(port, -ETIMEDOUT);
4682 tcpm_set_state(port, ready_state(port), 0);
4683 break;
4684 case VCONN_SWAP_START:
4685 if (port->vconn_role == TYPEC_SOURCE)
4686 tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0);
4687 else
4688 tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0);
4689 break;
4690 case VCONN_SWAP_WAIT_FOR_VCONN:
4691 tcpm_set_state(port, hard_reset_state(port),
4692 PD_T_VCONN_SOURCE_ON);
4693 break;
4694 case VCONN_SWAP_TURN_ON_VCONN:
4695 tcpm_set_vconn(port, true);
4696 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
4697 tcpm_set_state(port, ready_state(port), 0);
4698 break;
4699 case VCONN_SWAP_TURN_OFF_VCONN:
4700 tcpm_set_vconn(port, false);
4701 tcpm_set_state(port, ready_state(port), 0);
4702 break;
4703
4704 case DR_SWAP_CANCEL:
4705 case PR_SWAP_CANCEL:
4706 case VCONN_SWAP_CANCEL:
4707 tcpm_swap_complete(port, port->swap_status);
4708 if (port->pwr_role == TYPEC_SOURCE)
4709 tcpm_set_state(port, SRC_READY, 0);
4710 else
4711 tcpm_set_state(port, SNK_READY, 0);
4712 break;
4713 case FR_SWAP_CANCEL:
4714 if (port->pwr_role == TYPEC_SOURCE)
4715 tcpm_set_state(port, SRC_READY, 0);
4716 else
4717 tcpm_set_state(port, SNK_READY, 0);
4718 break;
4719
4720 case BIST_RX:
4721 switch (BDO_MODE_MASK(port->bist_request)) {
4722 case BDO_MODE_CARRIER2:
4723 tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
4724 tcpm_set_state(port, unattached_state(port),
4725 PD_T_BIST_CONT_MODE);
4726 break;
4727 case BDO_MODE_TESTDATA:
4728 if (port->tcpc->set_bist_data) {
4729 tcpm_log(port, "Enable BIST MODE TESTDATA");
4730 port->tcpc->set_bist_data(port->tcpc, true);
4731 }
4732 break;
4733 default:
4734 break;
4735 }
4736 break;
4737 case GET_STATUS_SEND:
4738 tcpm_pd_send_control(port, PD_CTRL_GET_STATUS);
4739 tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT,
4740 PD_T_SENDER_RESPONSE);
4741 break;
4742 case GET_STATUS_SEND_TIMEOUT:
4743 tcpm_set_state(port, ready_state(port), 0);
4744 break;
4745 case GET_PPS_STATUS_SEND:
4746 tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS);
4747 tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT,
4748 PD_T_SENDER_RESPONSE);
4749 break;
4750 case GET_PPS_STATUS_SEND_TIMEOUT:
4751 tcpm_set_state(port, ready_state(port), 0);
4752 break;
4753 case GET_SINK_CAP:
4754 tcpm_pd_send_control(port, PD_CTRL_GET_SINK_CAP);
4755 tcpm_set_state(port, GET_SINK_CAP_TIMEOUT, PD_T_SENDER_RESPONSE);
4756 break;
4757 case GET_SINK_CAP_TIMEOUT:
4758 port->sink_cap_done = true;
4759 tcpm_set_state(port, ready_state(port), 0);
4760 break;
4761 case ERROR_RECOVERY:
4762 tcpm_swap_complete(port, -EPROTO);
4763 tcpm_pps_complete(port, -EPROTO);
4764 tcpm_set_state(port, PORT_RESET, 0);
4765 break;
4766 case PORT_RESET:
4767 tcpm_reset_port(port);
4768 tcpm_set_cc(port, TYPEC_CC_OPEN);
4769 tcpm_set_state(port, PORT_RESET_WAIT_OFF,
4770 PD_T_ERROR_RECOVERY);
4771 break;
4772 case PORT_RESET_WAIT_OFF:
4773 tcpm_set_state(port,
4774 tcpm_default_state(port),
4775 port->vbus_present ? PD_T_PS_SOURCE_OFF : 0);
4776 break;
4777
4778
4779 case AMS_START:
4780 if (port->upcoming_state == INVALID_STATE) {
4781 tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ?
4782 SRC_READY : SNK_READY, 0);
4783 break;
4784 }
4785
4786 upcoming_state = port->upcoming_state;
4787 port->upcoming_state = INVALID_STATE;
4788 tcpm_set_state(port, upcoming_state, 0);
4789 break;
4790
4791
4792 case CHUNK_NOT_SUPP:
4793 tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP);
4794 tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ? SRC_READY : SNK_READY, 0);
4795 break;
4796 default:
4797 WARN(1, "Unexpected port state %d\n", port->state);
4798 break;
4799 }
4800}
4801
4802static void tcpm_state_machine_work(struct kthread_work *work)
4803{
4804 struct tcpm_port *port = container_of(work, struct tcpm_port, state_machine);
4805 enum tcpm_state prev_state;
4806
4807 mutex_lock(&port->lock);
4808 port->state_machine_running = true;
4809
4810 if (port->queued_message && tcpm_send_queued_message(port))
4811 goto done;
4812
4813
4814 if (port->delayed_state) {
4815 tcpm_log(port, "state change %s -> %s [delayed %ld ms]",
4816 tcpm_states[port->state],
4817 tcpm_states[port->delayed_state], port->delay_ms);
4818 port->prev_state = port->state;
4819 port->state = port->delayed_state;
4820 port->delayed_state = INVALID_STATE;
4821 }
4822
4823
4824
4825
4826
4827 do {
4828 prev_state = port->state;
4829 run_state_machine(port);
4830 if (port->queued_message)
4831 tcpm_send_queued_message(port);
4832 } while (port->state != prev_state && !port->delayed_state);
4833
4834done:
4835 port->state_machine_running = false;
4836 mutex_unlock(&port->lock);
4837}
4838
4839static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
4840 enum typec_cc_status cc2)
4841{
4842 enum typec_cc_status old_cc1, old_cc2;
4843 enum tcpm_state new_state;
4844
4845 old_cc1 = port->cc1;
4846 old_cc2 = port->cc2;
4847 port->cc1 = cc1;
4848 port->cc2 = cc2;
4849
4850 tcpm_log_force(port,
4851 "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]",
4852 old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state],
4853 port->polarity,
4854 tcpm_port_is_disconnected(port) ? "disconnected"
4855 : "connected");
4856
4857 switch (port->state) {
4858 case TOGGLING:
4859 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
4860 tcpm_port_is_source(port))
4861 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
4862 else if (tcpm_port_is_sink(port))
4863 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
4864 break;
4865 case SRC_UNATTACHED:
4866 case ACC_UNATTACHED:
4867 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
4868 tcpm_port_is_source(port))
4869 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
4870 break;
4871 case SRC_ATTACH_WAIT:
4872 if (tcpm_port_is_disconnected(port) ||
4873 tcpm_port_is_audio_detached(port))
4874 tcpm_set_state(port, SRC_UNATTACHED, 0);
4875 else if (cc1 != old_cc1 || cc2 != old_cc2)
4876 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
4877 break;
4878 case SRC_ATTACHED:
4879 case SRC_STARTUP:
4880 case SRC_SEND_CAPABILITIES:
4881 case SRC_READY:
4882 if (tcpm_port_is_disconnected(port) ||
4883 !tcpm_port_is_source(port)) {
4884 if (port->port_type == TYPEC_PORT_SRC)
4885 tcpm_set_state(port, SRC_UNATTACHED, tcpm_wait_for_discharge(port));
4886 else
4887 tcpm_set_state(port, SNK_UNATTACHED, tcpm_wait_for_discharge(port));
4888 }
4889 break;
4890 case SNK_UNATTACHED:
4891 if (tcpm_port_is_sink(port))
4892 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
4893 break;
4894 case SNK_ATTACH_WAIT:
4895 if ((port->cc1 == TYPEC_CC_OPEN &&
4896 port->cc2 != TYPEC_CC_OPEN) ||
4897 (port->cc1 != TYPEC_CC_OPEN &&
4898 port->cc2 == TYPEC_CC_OPEN))
4899 new_state = SNK_DEBOUNCED;
4900 else if (tcpm_port_is_disconnected(port))
4901 new_state = SNK_UNATTACHED;
4902 else
4903 break;
4904 if (new_state != port->delayed_state)
4905 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
4906 break;
4907 case SNK_DEBOUNCED:
4908 if (tcpm_port_is_disconnected(port))
4909 new_state = SNK_UNATTACHED;
4910 else if (port->vbus_present)
4911 new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED;
4912 else
4913 new_state = SNK_UNATTACHED;
4914 if (new_state != port->delayed_state)
4915 tcpm_set_state(port, SNK_DEBOUNCED, 0);
4916 break;
4917 case SNK_READY:
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934 if (!port->auto_vbus_discharge_enabled && tcpm_port_is_disconnected(port))
4935 tcpm_set_state(port, unattached_state(port), 0);
4936 else if (!port->pd_capable &&
4937 (cc1 != old_cc1 || cc2 != old_cc2))
4938 tcpm_set_current_limit(port,
4939 tcpm_get_current_limit(port),
4940 5000);
4941 break;
4942
4943 case AUDIO_ACC_ATTACHED:
4944 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
4945 tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0);
4946 break;
4947 case AUDIO_ACC_DEBOUNCE:
4948 if (tcpm_port_is_audio(port))
4949 tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0);
4950 break;
4951
4952 case DEBUG_ACC_ATTACHED:
4953 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
4954 tcpm_set_state(port, ACC_UNATTACHED, 0);
4955 break;
4956
4957 case SNK_TRY:
4958
4959 break;
4960
4961 case SNK_DISCOVERY:
4962
4963 if (tcpm_port_is_disconnected(port))
4964 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0);
4965 break;
4966 case SNK_DISCOVERY_DEBOUNCE:
4967 break;
4968
4969 case SRC_TRYWAIT:
4970
4971 if (!port->vbus_present && tcpm_port_is_source(port))
4972 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
4973 break;
4974 case SRC_TRYWAIT_DEBOUNCE:
4975 if (port->vbus_present || !tcpm_port_is_source(port))
4976 tcpm_set_state(port, SRC_TRYWAIT, 0);
4977 break;
4978 case SNK_TRY_WAIT_DEBOUNCE:
4979 if (!tcpm_port_is_sink(port)) {
4980 port->max_wait = 0;
4981 tcpm_set_state(port, SRC_TRYWAIT, 0);
4982 }
4983 break;
4984 case SRC_TRY_WAIT:
4985 if (tcpm_port_is_source(port))
4986 tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0);
4987 break;
4988 case SRC_TRY_DEBOUNCE:
4989 tcpm_set_state(port, SRC_TRY_WAIT, 0);
4990 break;
4991 case SNK_TRYWAIT_DEBOUNCE:
4992 if (tcpm_port_is_sink(port))
4993 tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0);
4994 break;
4995 case SNK_TRYWAIT_VBUS:
4996 if (!tcpm_port_is_sink(port))
4997 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
4998 break;
4999 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
5000 if (!tcpm_port_is_sink(port))
5001 tcpm_set_state(port, SRC_TRYWAIT, PD_T_TRY_CC_DEBOUNCE);
5002 else
5003 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS, 0);
5004 break;
5005 case SNK_TRYWAIT:
5006
5007 break;
5008 case PR_SWAP_SNK_SRC_SINK_OFF:
5009 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
5010 case PR_SWAP_SRC_SNK_SOURCE_OFF:
5011 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
5012 case PR_SWAP_SNK_SRC_SOURCE_ON:
5013
5014
5015
5016
5017 break;
5018 case FR_SWAP_SEND:
5019 case FR_SWAP_SEND_TIMEOUT:
5020 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
5021 case FR_SWAP_SNK_SRC_NEW_SINK_READY:
5022 case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED:
5023
5024 break;
5025
5026 case PORT_RESET:
5027 case PORT_RESET_WAIT_OFF:
5028
5029
5030
5031
5032 break;
5033 default:
5034
5035
5036
5037
5038 if (tcpm_port_is_disconnected(port) && !(port->pwr_role == TYPEC_SINK &&
5039 port->auto_vbus_discharge_enabled))
5040 tcpm_set_state(port, unattached_state(port), 0);
5041 break;
5042 }
5043}
5044
5045static void _tcpm_pd_vbus_on(struct tcpm_port *port)
5046{
5047 tcpm_log_force(port, "VBUS on");
5048 port->vbus_present = true;
5049
5050
5051
5052
5053 port->vbus_vsafe0v = false;
5054
5055 switch (port->state) {
5056 case SNK_TRANSITION_SINK_VBUS:
5057 port->explicit_contract = true;
5058 tcpm_set_state(port, SNK_READY, 0);
5059 break;
5060 case SNK_DISCOVERY:
5061 tcpm_set_state(port, SNK_DISCOVERY, 0);
5062 break;
5063
5064 case SNK_DEBOUNCED:
5065 tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY
5066 : SNK_ATTACHED,
5067 0);
5068 break;
5069 case SNK_HARD_RESET_WAIT_VBUS:
5070 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0);
5071 break;
5072 case SRC_ATTACHED:
5073 tcpm_set_state(port, SRC_STARTUP, 0);
5074 break;
5075 case SRC_HARD_RESET_VBUS_ON:
5076 tcpm_set_state(port, SRC_STARTUP, 0);
5077 break;
5078
5079 case SNK_TRY:
5080
5081 break;
5082 case SRC_TRYWAIT:
5083
5084 break;
5085 case SRC_TRYWAIT_DEBOUNCE:
5086 tcpm_set_state(port, SRC_TRYWAIT, 0);
5087 break;
5088 case SNK_TRY_WAIT_DEBOUNCE:
5089
5090 break;
5091 case SNK_TRYWAIT:
5092
5093 break;
5094 case SNK_TRYWAIT_VBUS:
5095 if (tcpm_port_is_sink(port))
5096 tcpm_set_state(port, SNK_ATTACHED, 0);
5097 break;
5098 case SNK_TRYWAIT_DEBOUNCE:
5099
5100 break;
5101 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
5102 if (port->vbus_present && tcpm_port_is_sink(port))
5103 tcpm_set_state(port, SNK_ATTACHED, 0);
5104 break;
5105 case SRC_TRY_WAIT:
5106 case SRC_TRY_DEBOUNCE:
5107
5108 break;
5109 case FR_SWAP_SEND:
5110 case FR_SWAP_SEND_TIMEOUT:
5111 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
5112 case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED:
5113 if (port->tcpc->frs_sourcing_vbus)
5114 port->tcpc->frs_sourcing_vbus(port->tcpc);
5115 break;
5116 case FR_SWAP_SNK_SRC_NEW_SINK_READY:
5117 if (port->tcpc->frs_sourcing_vbus)
5118 port->tcpc->frs_sourcing_vbus(port->tcpc);
5119 tcpm_set_state(port, FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED, 0);
5120 break;
5121
5122 case PORT_RESET:
5123 case PORT_RESET_WAIT_OFF:
5124
5125
5126
5127
5128 break;
5129
5130 default:
5131 break;
5132 }
5133}
5134
5135static void _tcpm_pd_vbus_off(struct tcpm_port *port)
5136{
5137 tcpm_log_force(port, "VBUS off");
5138 port->vbus_present = false;
5139 port->vbus_never_low = false;
5140 switch (port->state) {
5141 case SNK_HARD_RESET_SINK_OFF:
5142 tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0);
5143 break;
5144 case HARD_RESET_SEND:
5145 break;
5146 case SNK_TRY:
5147
5148 break;
5149 case SRC_TRYWAIT:
5150
5151 if (tcpm_port_is_source(port))
5152 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
5153 break;
5154 case SNK_TRY_WAIT_DEBOUNCE:
5155
5156 break;
5157 case SNK_TRYWAIT:
5158 case SNK_TRYWAIT_VBUS:
5159 case SNK_TRYWAIT_DEBOUNCE:
5160 break;
5161 case SNK_ATTACH_WAIT:
5162 tcpm_set_state(port, SNK_UNATTACHED, 0);
5163 break;
5164
5165 case SNK_NEGOTIATE_CAPABILITIES:
5166 break;
5167
5168 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
5169 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0);
5170 break;
5171
5172 case PR_SWAP_SNK_SRC_SINK_OFF:
5173
5174 break;
5175
5176 case PR_SWAP_SNK_SRC_SOURCE_ON:
5177
5178
5179
5180
5181
5182 break;
5183
5184 case PORT_RESET_WAIT_OFF:
5185 tcpm_set_state(port, tcpm_default_state(port), 0);
5186 break;
5187
5188 case SRC_TRY_WAIT:
5189 case SRC_TRY_DEBOUNCE:
5190
5191 break;
5192
5193 case SRC_STARTUP:
5194 case SRC_SEND_CAPABILITIES:
5195 case SRC_SEND_CAPABILITIES_TIMEOUT:
5196 case SRC_NEGOTIATE_CAPABILITIES:
5197 case SRC_TRANSITION_SUPPLY:
5198 case SRC_READY:
5199 case SRC_WAIT_NEW_CAPABILITIES:
5200
5201
5202
5203
5204
5205
5206 if (port->port_type == TYPEC_PORT_SRC)
5207 tcpm_set_state(port, SRC_UNATTACHED, tcpm_wait_for_discharge(port));
5208 else
5209 tcpm_set_state(port, SNK_UNATTACHED, tcpm_wait_for_discharge(port));
5210 break;
5211
5212 case PORT_RESET:
5213
5214
5215
5216
5217 break;
5218
5219 case FR_SWAP_SEND:
5220 case FR_SWAP_SEND_TIMEOUT:
5221 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
5222 case FR_SWAP_SNK_SRC_NEW_SINK_READY:
5223 case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED:
5224
5225 break;
5226
5227 default:
5228 if (port->pwr_role == TYPEC_SINK && port->attached)
5229 tcpm_set_state(port, SNK_UNATTACHED, tcpm_wait_for_discharge(port));
5230 break;
5231 }
5232}
5233
5234static void _tcpm_pd_vbus_vsafe0v(struct tcpm_port *port)
5235{
5236 tcpm_log_force(port, "VBUS VSAFE0V");
5237 port->vbus_vsafe0v = true;
5238 switch (port->state) {
5239 case SRC_HARD_RESET_VBUS_OFF:
5240
5241
5242
5243
5244 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
5245 break;
5246 case SRC_ATTACH_WAIT:
5247 if (tcpm_port_is_source(port))
5248 tcpm_set_state(port, tcpm_try_snk(port) ? SNK_TRY : SRC_ATTACHED,
5249 PD_T_CC_DEBOUNCE);
5250 break;
5251 case SRC_STARTUP:
5252 case SRC_SEND_CAPABILITIES:
5253 case SRC_SEND_CAPABILITIES_TIMEOUT:
5254 case SRC_NEGOTIATE_CAPABILITIES:
5255 case SRC_TRANSITION_SUPPLY:
5256 case SRC_READY:
5257 case SRC_WAIT_NEW_CAPABILITIES:
5258 if (port->auto_vbus_discharge_enabled) {
5259 if (port->port_type == TYPEC_PORT_SRC)
5260 tcpm_set_state(port, SRC_UNATTACHED, 0);
5261 else
5262 tcpm_set_state(port, SNK_UNATTACHED, 0);
5263 }
5264 break;
5265 case PR_SWAP_SNK_SRC_SINK_OFF:
5266 case PR_SWAP_SNK_SRC_SOURCE_ON:
5267
5268 break;
5269 default:
5270 if (port->pwr_role == TYPEC_SINK && port->auto_vbus_discharge_enabled)
5271 tcpm_set_state(port, SNK_UNATTACHED, 0);
5272 break;
5273 }
5274}
5275
5276static void _tcpm_pd_hard_reset(struct tcpm_port *port)
5277{
5278 tcpm_log_force(port, "Received hard reset");
5279 if (port->bist_request == BDO_MODE_TESTDATA && port->tcpc->set_bist_data)
5280 port->tcpc->set_bist_data(port->tcpc, false);
5281
5282 if (port->ams != NONE_AMS)
5283 port->ams = NONE_AMS;
5284 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)
5285 port->ams = HARD_RESET;
5286
5287
5288
5289
5290 tcpm_set_state(port,
5291 port->hard_reset_count < PD_N_HARD_RESET_COUNT ?
5292 HARD_RESET_START : ERROR_RECOVERY,
5293 0);
5294}
5295
5296static void tcpm_pd_event_handler(struct kthread_work *work)
5297{
5298 struct tcpm_port *port = container_of(work, struct tcpm_port,
5299 event_work);
5300 u32 events;
5301
5302 mutex_lock(&port->lock);
5303
5304 spin_lock(&port->pd_event_lock);
5305 while (port->pd_events) {
5306 events = port->pd_events;
5307 port->pd_events = 0;
5308 spin_unlock(&port->pd_event_lock);
5309 if (events & TCPM_RESET_EVENT)
5310 _tcpm_pd_hard_reset(port);
5311 if (events & TCPM_VBUS_EVENT) {
5312 bool vbus;
5313
5314 vbus = port->tcpc->get_vbus(port->tcpc);
5315 if (vbus) {
5316 _tcpm_pd_vbus_on(port);
5317 } else {
5318 _tcpm_pd_vbus_off(port);
5319
5320
5321
5322
5323
5324 if (!port->tcpc->is_vbus_vsafe0v ||
5325 port->tcpc->is_vbus_vsafe0v(port->tcpc))
5326 _tcpm_pd_vbus_vsafe0v(port);
5327 }
5328 }
5329 if (events & TCPM_CC_EVENT) {
5330 enum typec_cc_status cc1, cc2;
5331
5332 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
5333 _tcpm_cc_change(port, cc1, cc2);
5334 }
5335 if (events & TCPM_FRS_EVENT) {
5336 if (port->state == SNK_READY) {
5337 int ret;
5338
5339 port->upcoming_state = FR_SWAP_SEND;
5340 ret = tcpm_ams_start(port, FAST_ROLE_SWAP);
5341 if (ret == -EAGAIN)
5342 port->upcoming_state = INVALID_STATE;
5343 } else {
5344 tcpm_log(port, "Discarding FRS_SIGNAL! Not in sink ready");
5345 }
5346 }
5347 if (events & TCPM_SOURCING_VBUS) {
5348 tcpm_log(port, "sourcing vbus");
5349
5350
5351
5352
5353
5354
5355
5356 port->vbus_source = true;
5357 _tcpm_pd_vbus_on(port);
5358 }
5359
5360 spin_lock(&port->pd_event_lock);
5361 }
5362 spin_unlock(&port->pd_event_lock);
5363 mutex_unlock(&port->lock);
5364}
5365
5366void tcpm_cc_change(struct tcpm_port *port)
5367{
5368 spin_lock(&port->pd_event_lock);
5369 port->pd_events |= TCPM_CC_EVENT;
5370 spin_unlock(&port->pd_event_lock);
5371 kthread_queue_work(port->wq, &port->event_work);
5372}
5373EXPORT_SYMBOL_GPL(tcpm_cc_change);
5374
5375void tcpm_vbus_change(struct tcpm_port *port)
5376{
5377 spin_lock(&port->pd_event_lock);
5378 port->pd_events |= TCPM_VBUS_EVENT;
5379 spin_unlock(&port->pd_event_lock);
5380 kthread_queue_work(port->wq, &port->event_work);
5381}
5382EXPORT_SYMBOL_GPL(tcpm_vbus_change);
5383
5384void tcpm_pd_hard_reset(struct tcpm_port *port)
5385{
5386 spin_lock(&port->pd_event_lock);
5387 port->pd_events = TCPM_RESET_EVENT;
5388 spin_unlock(&port->pd_event_lock);
5389 kthread_queue_work(port->wq, &port->event_work);
5390}
5391EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
5392
5393void tcpm_sink_frs(struct tcpm_port *port)
5394{
5395 spin_lock(&port->pd_event_lock);
5396 port->pd_events |= TCPM_FRS_EVENT;
5397 spin_unlock(&port->pd_event_lock);
5398 kthread_queue_work(port->wq, &port->event_work);
5399}
5400EXPORT_SYMBOL_GPL(tcpm_sink_frs);
5401
5402void tcpm_sourcing_vbus(struct tcpm_port *port)
5403{
5404 spin_lock(&port->pd_event_lock);
5405 port->pd_events |= TCPM_SOURCING_VBUS;
5406 spin_unlock(&port->pd_event_lock);
5407 kthread_queue_work(port->wq, &port->event_work);
5408}
5409EXPORT_SYMBOL_GPL(tcpm_sourcing_vbus);
5410
5411static void tcpm_enable_frs_work(struct kthread_work *work)
5412{
5413 struct tcpm_port *port = container_of(work, struct tcpm_port, enable_frs);
5414 int ret;
5415
5416 mutex_lock(&port->lock);
5417
5418 if (!port->connected || port->port_type != TYPEC_PORT_DRP ||
5419 port->pwr_opmode != TYPEC_PWR_MODE_PD ||
5420 !port->tcpc->enable_frs ||
5421
5422 port->sink_cap_done || port->negotiated_rev < PD_REV30)
5423 goto unlock;
5424
5425
5426 if (port->state != SNK_READY || port->vdm_sm_running || port->send_discover)
5427 goto resched;
5428
5429 port->upcoming_state = GET_SINK_CAP;
5430 ret = tcpm_ams_start(port, GET_SINK_CAPABILITIES);
5431 if (ret == -EAGAIN) {
5432 port->upcoming_state = INVALID_STATE;
5433 } else {
5434 port->sink_cap_done = true;
5435 goto unlock;
5436 }
5437resched:
5438 mod_enable_frs_delayed_work(port, GET_SINK_CAP_RETRY_MS);
5439unlock:
5440 mutex_unlock(&port->lock);
5441}
5442
5443static void tcpm_send_discover_work(struct kthread_work *work)
5444{
5445 struct tcpm_port *port = container_of(work, struct tcpm_port, send_discover_work);
5446
5447 mutex_lock(&port->lock);
5448
5449 if (!port->send_discover)
5450 goto unlock;
5451
5452 if (port->data_role == TYPEC_DEVICE && port->negotiated_rev < PD_REV30) {
5453 port->send_discover = false;
5454 goto unlock;
5455 }
5456
5457
5458 if ((port->state != SRC_READY && port->state != SNK_READY) || port->vdm_sm_running) {
5459 mod_send_discover_delayed_work(port, SEND_DISCOVER_RETRY_MS);
5460 goto unlock;
5461 }
5462
5463 tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0);
5464
5465unlock:
5466 mutex_unlock(&port->lock);
5467}
5468
5469static int tcpm_dr_set(struct typec_port *p, enum typec_data_role data)
5470{
5471 struct tcpm_port *port = typec_get_drvdata(p);
5472 int ret;
5473
5474 mutex_lock(&port->swap_lock);
5475 mutex_lock(&port->lock);
5476
5477 if (port->typec_caps.data != TYPEC_PORT_DRD) {
5478 ret = -EINVAL;
5479 goto port_unlock;
5480 }
5481 if (port->state != SRC_READY && port->state != SNK_READY) {
5482 ret = -EAGAIN;
5483 goto port_unlock;
5484 }
5485
5486 if (port->data_role == data) {
5487 ret = 0;
5488 goto port_unlock;
5489 }
5490
5491
5492
5493
5494
5495
5496
5497
5498 if (!port->pd_capable) {
5499
5500
5501
5502
5503
5504 if (port->try_role == TYPEC_NO_PREFERRED_ROLE ||
5505 port->try_role == port->pwr_role) {
5506 ret = -EINVAL;
5507 goto port_unlock;
5508 }
5509 port->non_pd_role_swap = true;
5510 tcpm_set_state(port, PORT_RESET, 0);
5511 } else {
5512 port->upcoming_state = DR_SWAP_SEND;
5513 ret = tcpm_ams_start(port, DATA_ROLE_SWAP);
5514 if (ret == -EAGAIN) {
5515 port->upcoming_state = INVALID_STATE;
5516 goto port_unlock;
5517 }
5518 }
5519
5520 port->swap_status = 0;
5521 port->swap_pending = true;
5522 reinit_completion(&port->swap_complete);
5523 mutex_unlock(&port->lock);
5524
5525 if (!wait_for_completion_timeout(&port->swap_complete,
5526 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
5527 ret = -ETIMEDOUT;
5528 else
5529 ret = port->swap_status;
5530
5531 port->non_pd_role_swap = false;
5532 goto swap_unlock;
5533
5534port_unlock:
5535 mutex_unlock(&port->lock);
5536swap_unlock:
5537 mutex_unlock(&port->swap_lock);
5538 return ret;
5539}
5540
5541static int tcpm_pr_set(struct typec_port *p, enum typec_role role)
5542{
5543 struct tcpm_port *port = typec_get_drvdata(p);
5544 int ret;
5545
5546 mutex_lock(&port->swap_lock);
5547 mutex_lock(&port->lock);
5548
5549 if (port->port_type != TYPEC_PORT_DRP) {
5550 ret = -EINVAL;
5551 goto port_unlock;
5552 }
5553 if (port->state != SRC_READY && port->state != SNK_READY) {
5554 ret = -EAGAIN;
5555 goto port_unlock;
5556 }
5557
5558 if (role == port->pwr_role) {
5559 ret = 0;
5560 goto port_unlock;
5561 }
5562
5563 port->upcoming_state = PR_SWAP_SEND;
5564 ret = tcpm_ams_start(port, POWER_ROLE_SWAP);
5565 if (ret == -EAGAIN) {
5566 port->upcoming_state = INVALID_STATE;
5567 goto port_unlock;
5568 }
5569
5570 port->swap_status = 0;
5571 port->swap_pending = true;
5572 reinit_completion(&port->swap_complete);
5573 mutex_unlock(&port->lock);
5574
5575 if (!wait_for_completion_timeout(&port->swap_complete,
5576 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
5577 ret = -ETIMEDOUT;
5578 else
5579 ret = port->swap_status;
5580
5581 goto swap_unlock;
5582
5583port_unlock:
5584 mutex_unlock(&port->lock);
5585swap_unlock:
5586 mutex_unlock(&port->swap_lock);
5587 return ret;
5588}
5589
5590static int tcpm_vconn_set(struct typec_port *p, enum typec_role role)
5591{
5592 struct tcpm_port *port = typec_get_drvdata(p);
5593 int ret;
5594
5595 mutex_lock(&port->swap_lock);
5596 mutex_lock(&port->lock);
5597
5598 if (port->state != SRC_READY && port->state != SNK_READY) {
5599 ret = -EAGAIN;
5600 goto port_unlock;
5601 }
5602
5603 if (role == port->vconn_role) {
5604 ret = 0;
5605 goto port_unlock;
5606 }
5607
5608 port->upcoming_state = VCONN_SWAP_SEND;
5609 ret = tcpm_ams_start(port, VCONN_SWAP);
5610 if (ret == -EAGAIN) {
5611 port->upcoming_state = INVALID_STATE;
5612 goto port_unlock;
5613 }
5614
5615 port->swap_status = 0;
5616 port->swap_pending = true;
5617 reinit_completion(&port->swap_complete);
5618 mutex_unlock(&port->lock);
5619
5620 if (!wait_for_completion_timeout(&port->swap_complete,
5621 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
5622 ret = -ETIMEDOUT;
5623 else
5624 ret = port->swap_status;
5625
5626 goto swap_unlock;
5627
5628port_unlock:
5629 mutex_unlock(&port->lock);
5630swap_unlock:
5631 mutex_unlock(&port->swap_lock);
5632 return ret;
5633}
5634
5635static int tcpm_try_role(struct typec_port *p, int role)
5636{
5637 struct tcpm_port *port = typec_get_drvdata(p);
5638 struct tcpc_dev *tcpc = port->tcpc;
5639 int ret = 0;
5640
5641 mutex_lock(&port->lock);
5642 if (tcpc->try_role)
5643 ret = tcpc->try_role(tcpc, role);
5644 if (!ret)
5645 port->try_role = role;
5646 port->try_src_count = 0;
5647 port->try_snk_count = 0;
5648 mutex_unlock(&port->lock);
5649
5650 return ret;
5651}
5652
5653static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 req_op_curr)
5654{
5655 unsigned int target_mw;
5656 int ret;
5657
5658 mutex_lock(&port->swap_lock);
5659 mutex_lock(&port->lock);
5660
5661 if (!port->pps_data.active) {
5662 ret = -EOPNOTSUPP;
5663 goto port_unlock;
5664 }
5665
5666 if (port->state != SNK_READY) {
5667 ret = -EAGAIN;
5668 goto port_unlock;
5669 }
5670
5671 if (req_op_curr > port->pps_data.max_curr) {
5672 ret = -EINVAL;
5673 goto port_unlock;
5674 }
5675
5676 target_mw = (req_op_curr * port->supply_voltage) / 1000;
5677 if (target_mw < port->operating_snk_mw) {
5678 ret = -EINVAL;
5679 goto port_unlock;
5680 }
5681
5682 port->upcoming_state = SNK_NEGOTIATE_PPS_CAPABILITIES;
5683 ret = tcpm_ams_start(port, POWER_NEGOTIATION);
5684 if (ret == -EAGAIN) {
5685 port->upcoming_state = INVALID_STATE;
5686 goto port_unlock;
5687 }
5688
5689
5690 req_op_curr = req_op_curr - (req_op_curr % RDO_PROG_CURR_MA_STEP);
5691
5692 reinit_completion(&port->pps_complete);
5693 port->pps_data.req_op_curr = req_op_curr;
5694 port->pps_status = 0;
5695 port->pps_pending = true;
5696 mutex_unlock(&port->lock);
5697
5698 if (!wait_for_completion_timeout(&port->pps_complete,
5699 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
5700 ret = -ETIMEDOUT;
5701 else
5702 ret = port->pps_status;
5703
5704 goto swap_unlock;
5705
5706port_unlock:
5707 mutex_unlock(&port->lock);
5708swap_unlock:
5709 mutex_unlock(&port->swap_lock);
5710
5711 return ret;
5712}
5713
5714static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 req_out_volt)
5715{
5716 unsigned int target_mw;
5717 int ret;
5718
5719 mutex_lock(&port->swap_lock);
5720 mutex_lock(&port->lock);
5721
5722 if (!port->pps_data.active) {
5723 ret = -EOPNOTSUPP;
5724 goto port_unlock;
5725 }
5726
5727 if (port->state != SNK_READY) {
5728 ret = -EAGAIN;
5729 goto port_unlock;
5730 }
5731
5732 if (req_out_volt < port->pps_data.min_volt ||
5733 req_out_volt > port->pps_data.max_volt) {
5734 ret = -EINVAL;
5735 goto port_unlock;
5736 }
5737
5738 target_mw = (port->current_limit * req_out_volt) / 1000;
5739 if (target_mw < port->operating_snk_mw) {
5740 ret = -EINVAL;
5741 goto port_unlock;
5742 }
5743
5744 port->upcoming_state = SNK_NEGOTIATE_PPS_CAPABILITIES;
5745 ret = tcpm_ams_start(port, POWER_NEGOTIATION);
5746 if (ret == -EAGAIN) {
5747 port->upcoming_state = INVALID_STATE;
5748 goto port_unlock;
5749 }
5750
5751
5752 req_out_volt = req_out_volt - (req_out_volt % RDO_PROG_VOLT_MV_STEP);
5753
5754 reinit_completion(&port->pps_complete);
5755 port->pps_data.req_out_volt = req_out_volt;
5756 port->pps_status = 0;
5757 port->pps_pending = true;
5758 mutex_unlock(&port->lock);
5759
5760 if (!wait_for_completion_timeout(&port->pps_complete,
5761 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
5762 ret = -ETIMEDOUT;
5763 else
5764 ret = port->pps_status;
5765
5766 goto swap_unlock;
5767
5768port_unlock:
5769 mutex_unlock(&port->lock);
5770swap_unlock:
5771 mutex_unlock(&port->swap_lock);
5772
5773 return ret;
5774}
5775
5776static int tcpm_pps_activate(struct tcpm_port *port, bool activate)
5777{
5778 int ret = 0;
5779
5780 mutex_lock(&port->swap_lock);
5781 mutex_lock(&port->lock);
5782
5783 if (!port->pps_data.supported) {
5784 ret = -EOPNOTSUPP;
5785 goto port_unlock;
5786 }
5787
5788
5789 if (!port->pps_data.active && !activate)
5790 goto port_unlock;
5791
5792 if (port->state != SNK_READY) {
5793 ret = -EAGAIN;
5794 goto port_unlock;
5795 }
5796
5797 if (activate)
5798 port->upcoming_state = SNK_NEGOTIATE_PPS_CAPABILITIES;
5799 else
5800 port->upcoming_state = SNK_NEGOTIATE_CAPABILITIES;
5801 ret = tcpm_ams_start(port, POWER_NEGOTIATION);
5802 if (ret == -EAGAIN) {
5803 port->upcoming_state = INVALID_STATE;
5804 goto port_unlock;
5805 }
5806
5807 reinit_completion(&port->pps_complete);
5808 port->pps_status = 0;
5809 port->pps_pending = true;
5810
5811
5812 if (activate) {
5813 port->pps_data.req_out_volt = port->supply_voltage;
5814 port->pps_data.req_op_curr = port->current_limit;
5815 }
5816 mutex_unlock(&port->lock);
5817
5818 if (!wait_for_completion_timeout(&port->pps_complete,
5819 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
5820 ret = -ETIMEDOUT;
5821 else
5822 ret = port->pps_status;
5823
5824 goto swap_unlock;
5825
5826port_unlock:
5827 mutex_unlock(&port->lock);
5828swap_unlock:
5829 mutex_unlock(&port->swap_lock);
5830
5831 return ret;
5832}
5833
5834static void tcpm_init(struct tcpm_port *port)
5835{
5836 enum typec_cc_status cc1, cc2;
5837
5838 port->tcpc->init(port->tcpc);
5839
5840 tcpm_reset_port(port);
5841
5842
5843
5844
5845
5846
5847 port->vbus_present = port->tcpc->get_vbus(port->tcpc);
5848 if (port->vbus_present)
5849 port->vbus_never_low = true;
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862 if (port->vbus_present)
5863 port->vbus_vsafe0v = false;
5864 else if (!port->tcpc->is_vbus_vsafe0v)
5865 port->vbus_vsafe0v = true;
5866 else
5867 port->vbus_vsafe0v = port->tcpc->is_vbus_vsafe0v(port->tcpc);
5868
5869 tcpm_set_state(port, tcpm_default_state(port), 0);
5870
5871 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
5872 _tcpm_cc_change(port, cc1, cc2);
5873
5874
5875
5876
5877
5878 tcpm_set_state(port, PORT_RESET, 0);
5879}
5880
5881static int tcpm_port_type_set(struct typec_port *p, enum typec_port_type type)
5882{
5883 struct tcpm_port *port = typec_get_drvdata(p);
5884
5885 mutex_lock(&port->lock);
5886 if (type == port->port_type)
5887 goto port_unlock;
5888
5889 port->port_type = type;
5890
5891 if (!port->connected) {
5892 tcpm_set_state(port, PORT_RESET, 0);
5893 } else if (type == TYPEC_PORT_SNK) {
5894 if (!(port->pwr_role == TYPEC_SINK &&
5895 port->data_role == TYPEC_DEVICE))
5896 tcpm_set_state(port, PORT_RESET, 0);
5897 } else if (type == TYPEC_PORT_SRC) {
5898 if (!(port->pwr_role == TYPEC_SOURCE &&
5899 port->data_role == TYPEC_HOST))
5900 tcpm_set_state(port, PORT_RESET, 0);
5901 }
5902
5903port_unlock:
5904 mutex_unlock(&port->lock);
5905 return 0;
5906}
5907
5908static const struct typec_operations tcpm_ops = {
5909 .try_role = tcpm_try_role,
5910 .dr_set = tcpm_dr_set,
5911 .pr_set = tcpm_pr_set,
5912 .vconn_set = tcpm_vconn_set,
5913 .port_type_set = tcpm_port_type_set
5914};
5915
5916void tcpm_tcpc_reset(struct tcpm_port *port)
5917{
5918 mutex_lock(&port->lock);
5919
5920 tcpm_init(port);
5921 mutex_unlock(&port->lock);
5922}
5923EXPORT_SYMBOL_GPL(tcpm_tcpc_reset);
5924
5925static int tcpm_fw_get_caps(struct tcpm_port *port,
5926 struct fwnode_handle *fwnode)
5927{
5928 const char *opmode_str;
5929 const char *cap_str;
5930 int ret;
5931 u32 mw, frs_current;
5932
5933 if (!fwnode)
5934 return -EINVAL;
5935
5936
5937
5938
5939
5940
5941
5942
5943 fw_devlink_purge_absent_suppliers(fwnode);
5944
5945
5946 ret = fwnode_property_read_string(fwnode, "data-role", &cap_str);
5947 if (ret == 0) {
5948 ret = typec_find_port_data_role(cap_str);
5949 if (ret < 0)
5950 return ret;
5951 port->typec_caps.data = ret;
5952 }
5953
5954 ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
5955 if (ret < 0)
5956 return ret;
5957
5958 ret = typec_find_port_power_role(cap_str);
5959 if (ret < 0)
5960 return ret;
5961 port->typec_caps.type = ret;
5962 port->port_type = port->typec_caps.type;
5963 port->pd_supported = !fwnode_property_read_bool(fwnode, "pd-disable");
5964
5965 port->slow_charger_loop = fwnode_property_read_bool(fwnode, "slow-charger-loop");
5966 if (port->port_type == TYPEC_PORT_SNK)
5967 goto sink;
5968
5969
5970 if (port->pd_supported) {
5971 ret = fwnode_property_count_u32(fwnode, "source-pdos");
5972 if (ret == 0)
5973 return -EINVAL;
5974 else if (ret < 0)
5975 return ret;
5976
5977 port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
5978 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
5979 port->src_pdo, port->nr_src_pdo);
5980 if (ret)
5981 return ret;
5982 ret = tcpm_validate_caps(port, port->src_pdo, port->nr_src_pdo);
5983 if (ret)
5984 return ret;
5985 } else {
5986 ret = fwnode_property_read_string(fwnode, "typec-power-opmode", &opmode_str);
5987 if (ret)
5988 return ret;
5989 ret = typec_find_pwr_opmode(opmode_str);
5990 if (ret < 0)
5991 return ret;
5992 port->src_rp = tcpm_pwr_opmode_to_rp(ret);
5993 }
5994
5995 if (port->port_type == TYPEC_PORT_SRC)
5996 return 0;
5997
5998
5999 ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str);
6000 if (ret < 0)
6001 return ret;
6002
6003 port->typec_caps.prefer_role = typec_find_power_role(cap_str);
6004 if (port->typec_caps.prefer_role < 0)
6005 return -EINVAL;
6006sink:
6007 port->self_powered = fwnode_property_read_bool(fwnode, "self-powered");
6008
6009 if (!port->pd_supported)
6010 return 0;
6011
6012
6013 ret = fwnode_property_count_u32(fwnode, "sink-pdos");
6014 if (ret <= 0)
6015 return -EINVAL;
6016
6017 port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS);
6018 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
6019 port->snk_pdo, port->nr_snk_pdo);
6020 if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo,
6021 port->nr_snk_pdo))
6022 return -EINVAL;
6023
6024 if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0)
6025 return -EINVAL;
6026 port->operating_snk_mw = mw / 1000;
6027
6028
6029 if (port->port_type == TYPEC_PORT_DRP) {
6030 ret = fwnode_property_read_u32(fwnode, "new-source-frs-typec-current",
6031 &frs_current);
6032 if (ret >= 0 && frs_current <= FRS_5V_3A)
6033 port->new_source_frs_current = frs_current;
6034 }
6035
6036
6037 ret = fwnode_property_count_u32(fwnode, "sink-vdos");
6038 if (ret < 0)
6039 ret = 0;
6040
6041 port->nr_snk_vdo = min(ret, VDO_MAX_OBJECTS);
6042 if (port->nr_snk_vdo) {
6043 ret = fwnode_property_read_u32_array(fwnode, "sink-vdos",
6044 port->snk_vdo,
6045 port->nr_snk_vdo);
6046 if (ret < 0)
6047 return ret;
6048 }
6049
6050
6051 if (port->nr_snk_vdo) {
6052 ret = fwnode_property_count_u32(fwnode, "sink-vdos-v1");
6053 if (ret < 0)
6054 return ret;
6055 else if (ret == 0)
6056 return -ENODATA;
6057
6058 port->nr_snk_vdo_v1 = min(ret, VDO_MAX_OBJECTS);
6059 ret = fwnode_property_read_u32_array(fwnode, "sink-vdos-v1",
6060 port->snk_vdo_v1,
6061 port->nr_snk_vdo_v1);
6062 if (ret < 0)
6063 return ret;
6064 }
6065
6066 return 0;
6067}
6068
6069
6070enum tcpm_psy_online_states {
6071 TCPM_PSY_OFFLINE = 0,
6072 TCPM_PSY_FIXED_ONLINE,
6073 TCPM_PSY_PROG_ONLINE,
6074};
6075
6076static enum power_supply_property tcpm_psy_props[] = {
6077 POWER_SUPPLY_PROP_USB_TYPE,
6078 POWER_SUPPLY_PROP_ONLINE,
6079 POWER_SUPPLY_PROP_VOLTAGE_MIN,
6080 POWER_SUPPLY_PROP_VOLTAGE_MAX,
6081 POWER_SUPPLY_PROP_VOLTAGE_NOW,
6082 POWER_SUPPLY_PROP_CURRENT_MAX,
6083 POWER_SUPPLY_PROP_CURRENT_NOW,
6084};
6085
6086static int tcpm_psy_get_online(struct tcpm_port *port,
6087 union power_supply_propval *val)
6088{
6089 if (port->vbus_charge) {
6090 if (port->pps_data.active)
6091 val->intval = TCPM_PSY_PROG_ONLINE;
6092 else
6093 val->intval = TCPM_PSY_FIXED_ONLINE;
6094 } else {
6095 val->intval = TCPM_PSY_OFFLINE;
6096 }
6097
6098 return 0;
6099}
6100
6101static int tcpm_psy_get_voltage_min(struct tcpm_port *port,
6102 union power_supply_propval *val)
6103{
6104 if (port->pps_data.active)
6105 val->intval = port->pps_data.min_volt * 1000;
6106 else
6107 val->intval = port->supply_voltage * 1000;
6108
6109 return 0;
6110}
6111
6112static int tcpm_psy_get_voltage_max(struct tcpm_port *port,
6113 union power_supply_propval *val)
6114{
6115 if (port->pps_data.active)
6116 val->intval = port->pps_data.max_volt * 1000;
6117 else
6118 val->intval = port->supply_voltage * 1000;
6119
6120 return 0;
6121}
6122
6123static int tcpm_psy_get_voltage_now(struct tcpm_port *port,
6124 union power_supply_propval *val)
6125{
6126 val->intval = port->supply_voltage * 1000;
6127
6128 return 0;
6129}
6130
6131static int tcpm_psy_get_current_max(struct tcpm_port *port,
6132 union power_supply_propval *val)
6133{
6134 if (port->pps_data.active)
6135 val->intval = port->pps_data.max_curr * 1000;
6136 else
6137 val->intval = port->current_limit * 1000;
6138
6139 return 0;
6140}
6141
6142static int tcpm_psy_get_current_now(struct tcpm_port *port,
6143 union power_supply_propval *val)
6144{
6145 val->intval = port->current_limit * 1000;
6146
6147 return 0;
6148}
6149
6150static int tcpm_psy_get_prop(struct power_supply *psy,
6151 enum power_supply_property psp,
6152 union power_supply_propval *val)
6153{
6154 struct tcpm_port *port = power_supply_get_drvdata(psy);
6155 int ret = 0;
6156
6157 switch (psp) {
6158 case POWER_SUPPLY_PROP_USB_TYPE:
6159 val->intval = port->usb_type;
6160 break;
6161 case POWER_SUPPLY_PROP_ONLINE:
6162 ret = tcpm_psy_get_online(port, val);
6163 break;
6164 case POWER_SUPPLY_PROP_VOLTAGE_MIN:
6165 ret = tcpm_psy_get_voltage_min(port, val);
6166 break;
6167 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
6168 ret = tcpm_psy_get_voltage_max(port, val);
6169 break;
6170 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
6171 ret = tcpm_psy_get_voltage_now(port, val);
6172 break;
6173 case POWER_SUPPLY_PROP_CURRENT_MAX:
6174 ret = tcpm_psy_get_current_max(port, val);
6175 break;
6176 case POWER_SUPPLY_PROP_CURRENT_NOW:
6177 ret = tcpm_psy_get_current_now(port, val);
6178 break;
6179 default:
6180 ret = -EINVAL;
6181 break;
6182 }
6183
6184 return ret;
6185}
6186
6187static int tcpm_psy_set_online(struct tcpm_port *port,
6188 const union power_supply_propval *val)
6189{
6190 int ret;
6191
6192 switch (val->intval) {
6193 case TCPM_PSY_FIXED_ONLINE:
6194 ret = tcpm_pps_activate(port, false);
6195 break;
6196 case TCPM_PSY_PROG_ONLINE:
6197 ret = tcpm_pps_activate(port, true);
6198 break;
6199 default:
6200 ret = -EINVAL;
6201 break;
6202 }
6203
6204 return ret;
6205}
6206
6207static int tcpm_psy_set_prop(struct power_supply *psy,
6208 enum power_supply_property psp,
6209 const union power_supply_propval *val)
6210{
6211 struct tcpm_port *port = power_supply_get_drvdata(psy);
6212 int ret;
6213
6214 switch (psp) {
6215 case POWER_SUPPLY_PROP_ONLINE:
6216 ret = tcpm_psy_set_online(port, val);
6217 break;
6218 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
6219 if (val->intval < port->pps_data.min_volt * 1000 ||
6220 val->intval > port->pps_data.max_volt * 1000)
6221 ret = -EINVAL;
6222 else
6223 ret = tcpm_pps_set_out_volt(port, val->intval / 1000);
6224 break;
6225 case POWER_SUPPLY_PROP_CURRENT_NOW:
6226 if (val->intval > port->pps_data.max_curr * 1000)
6227 ret = -EINVAL;
6228 else
6229 ret = tcpm_pps_set_op_curr(port, val->intval / 1000);
6230 break;
6231 default:
6232 ret = -EINVAL;
6233 break;
6234 }
6235 power_supply_changed(port->psy);
6236 return ret;
6237}
6238
6239static int tcpm_psy_prop_writeable(struct power_supply *psy,
6240 enum power_supply_property psp)
6241{
6242 switch (psp) {
6243 case POWER_SUPPLY_PROP_ONLINE:
6244 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
6245 case POWER_SUPPLY_PROP_CURRENT_NOW:
6246 return 1;
6247 default:
6248 return 0;
6249 }
6250}
6251
6252static enum power_supply_usb_type tcpm_psy_usb_types[] = {
6253 POWER_SUPPLY_USB_TYPE_C,
6254 POWER_SUPPLY_USB_TYPE_PD,
6255 POWER_SUPPLY_USB_TYPE_PD_PPS,
6256};
6257
6258static const char *tcpm_psy_name_prefix = "tcpm-source-psy-";
6259
6260static int devm_tcpm_psy_register(struct tcpm_port *port)
6261{
6262 struct power_supply_config psy_cfg = {};
6263 const char *port_dev_name = dev_name(port->dev);
6264 size_t psy_name_len = strlen(tcpm_psy_name_prefix) +
6265 strlen(port_dev_name) + 1;
6266 char *psy_name;
6267
6268 psy_cfg.drv_data = port;
6269 psy_cfg.fwnode = dev_fwnode(port->dev);
6270 psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL);
6271 if (!psy_name)
6272 return -ENOMEM;
6273
6274 snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix,
6275 port_dev_name);
6276 port->psy_desc.name = psy_name;
6277 port->psy_desc.type = POWER_SUPPLY_TYPE_USB;
6278 port->psy_desc.usb_types = tcpm_psy_usb_types;
6279 port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types);
6280 port->psy_desc.properties = tcpm_psy_props;
6281 port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props);
6282 port->psy_desc.get_property = tcpm_psy_get_prop;
6283 port->psy_desc.set_property = tcpm_psy_set_prop;
6284 port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable;
6285
6286 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
6287
6288 port->psy = devm_power_supply_register(port->dev, &port->psy_desc,
6289 &psy_cfg);
6290
6291 return PTR_ERR_OR_ZERO(port->psy);
6292}
6293
6294static enum hrtimer_restart state_machine_timer_handler(struct hrtimer *timer)
6295{
6296 struct tcpm_port *port = container_of(timer, struct tcpm_port, state_machine_timer);
6297
6298 kthread_queue_work(port->wq, &port->state_machine);
6299 return HRTIMER_NORESTART;
6300}
6301
6302static enum hrtimer_restart vdm_state_machine_timer_handler(struct hrtimer *timer)
6303{
6304 struct tcpm_port *port = container_of(timer, struct tcpm_port, vdm_state_machine_timer);
6305
6306 kthread_queue_work(port->wq, &port->vdm_state_machine);
6307 return HRTIMER_NORESTART;
6308}
6309
6310static enum hrtimer_restart enable_frs_timer_handler(struct hrtimer *timer)
6311{
6312 struct tcpm_port *port = container_of(timer, struct tcpm_port, enable_frs_timer);
6313
6314 kthread_queue_work(port->wq, &port->enable_frs);
6315 return HRTIMER_NORESTART;
6316}
6317
6318static enum hrtimer_restart send_discover_timer_handler(struct hrtimer *timer)
6319{
6320 struct tcpm_port *port = container_of(timer, struct tcpm_port, send_discover_timer);
6321
6322 kthread_queue_work(port->wq, &port->send_discover_work);
6323 return HRTIMER_NORESTART;
6324}
6325
6326struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
6327{
6328 struct tcpm_port *port;
6329 int err;
6330
6331 if (!dev || !tcpc ||
6332 !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc ||
6333 !tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus ||
6334 !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit)
6335 return ERR_PTR(-EINVAL);
6336
6337 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
6338 if (!port)
6339 return ERR_PTR(-ENOMEM);
6340
6341 port->dev = dev;
6342 port->tcpc = tcpc;
6343
6344 mutex_init(&port->lock);
6345 mutex_init(&port->swap_lock);
6346
6347 port->wq = kthread_create_worker(0, dev_name(dev));
6348 if (IS_ERR(port->wq))
6349 return ERR_CAST(port->wq);
6350 sched_set_fifo(port->wq->task);
6351
6352 kthread_init_work(&port->state_machine, tcpm_state_machine_work);
6353 kthread_init_work(&port->vdm_state_machine, vdm_state_machine_work);
6354 kthread_init_work(&port->event_work, tcpm_pd_event_handler);
6355 kthread_init_work(&port->enable_frs, tcpm_enable_frs_work);
6356 kthread_init_work(&port->send_discover_work, tcpm_send_discover_work);
6357 hrtimer_init(&port->state_machine_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
6358 port->state_machine_timer.function = state_machine_timer_handler;
6359 hrtimer_init(&port->vdm_state_machine_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
6360 port->vdm_state_machine_timer.function = vdm_state_machine_timer_handler;
6361 hrtimer_init(&port->enable_frs_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
6362 port->enable_frs_timer.function = enable_frs_timer_handler;
6363 hrtimer_init(&port->send_discover_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
6364 port->send_discover_timer.function = send_discover_timer_handler;
6365
6366 spin_lock_init(&port->pd_event_lock);
6367
6368 init_completion(&port->tx_complete);
6369 init_completion(&port->swap_complete);
6370 init_completion(&port->pps_complete);
6371 tcpm_debugfs_init(port);
6372
6373 err = tcpm_fw_get_caps(port, tcpc->fwnode);
6374 if (err < 0)
6375 goto out_destroy_wq;
6376
6377 port->try_role = port->typec_caps.prefer_role;
6378
6379 port->typec_caps.fwnode = tcpc->fwnode;
6380 port->typec_caps.revision = 0x0120;
6381 port->typec_caps.pd_revision = 0x0300;
6382 port->typec_caps.svdm_version = SVDM_VER_2_0;
6383 port->typec_caps.driver_data = port;
6384 port->typec_caps.ops = &tcpm_ops;
6385 port->typec_caps.orientation_aware = 1;
6386
6387 port->partner_desc.identity = &port->partner_ident;
6388 port->port_type = port->typec_caps.type;
6389
6390 port->role_sw = usb_role_switch_get(port->dev);
6391 if (IS_ERR(port->role_sw)) {
6392 err = PTR_ERR(port->role_sw);
6393 goto out_destroy_wq;
6394 }
6395
6396 err = devm_tcpm_psy_register(port);
6397 if (err)
6398 goto out_role_sw_put;
6399 power_supply_changed(port->psy);
6400
6401 port->typec_port = typec_register_port(port->dev, &port->typec_caps);
6402 if (IS_ERR(port->typec_port)) {
6403 err = PTR_ERR(port->typec_port);
6404 goto out_role_sw_put;
6405 }
6406
6407 typec_port_register_altmodes(port->typec_port,
6408 &tcpm_altmode_ops, port,
6409 port->port_altmode, ALTMODE_DISCOVERY_MAX);
6410
6411 mutex_lock(&port->lock);
6412 tcpm_init(port);
6413 mutex_unlock(&port->lock);
6414
6415 tcpm_log(port, "%s: registered", dev_name(dev));
6416 return port;
6417
6418out_role_sw_put:
6419 usb_role_switch_put(port->role_sw);
6420out_destroy_wq:
6421 tcpm_debugfs_exit(port);
6422 kthread_destroy_worker(port->wq);
6423 return ERR_PTR(err);
6424}
6425EXPORT_SYMBOL_GPL(tcpm_register_port);
6426
6427void tcpm_unregister_port(struct tcpm_port *port)
6428{
6429 int i;
6430
6431 hrtimer_cancel(&port->send_discover_timer);
6432 hrtimer_cancel(&port->enable_frs_timer);
6433 hrtimer_cancel(&port->vdm_state_machine_timer);
6434 hrtimer_cancel(&port->state_machine_timer);
6435
6436 tcpm_reset_port(port);
6437 for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++)
6438 typec_unregister_altmode(port->port_altmode[i]);
6439 typec_unregister_port(port->typec_port);
6440 usb_role_switch_put(port->role_sw);
6441 tcpm_debugfs_exit(port);
6442 kthread_destroy_worker(port->wq);
6443}
6444EXPORT_SYMBOL_GPL(tcpm_unregister_port);
6445
6446MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>");
6447MODULE_DESCRIPTION("USB Type-C Port Manager");
6448MODULE_LICENSE("GPL");
6449