1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2015-2017 Google, Inc
5 * USB Power Delivery protocol stack.
8 #include <linux/completion.h>
9 #include <linux/debugfs.h>
10 #include <linux/device.h>
11 #include <linux/jiffies.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/mutex.h>
15 #include <linux/power_supply.h>
16 #include <linux/proc_fs.h>
17 #include <linux/property.h>
18 #include <linux/sched/clock.h>
19 #include <linux/seq_file.h>
20 #include <linux/slab.h>
21 #include <linux/spinlock.h>
22 #include <linux/usb/pd.h>
23 #include <linux/usb/pd_ado.h>
24 #include <linux/usb/pd_bdo.h>
25 #include <linux/usb/pd_ext_sdb.h>
26 #include <linux/usb/pd_vdo.h>
27 #include <linux/usb/role.h>
28 #include <linux/usb/tcpm.h>
29 #include <linux/usb/typec_altmode.h>
30 #include <linux/workqueue.h>
32 #define FOREACH_STATE(S) \
39 S(SRC_SEND_CAPABILITIES), \
40 S(SRC_SEND_CAPABILITIES_TIMEOUT), \
41 S(SRC_NEGOTIATE_CAPABILITIES), \
42 S(SRC_TRANSITION_SUPPLY), \
44 S(SRC_WAIT_NEW_CAPABILITIES), \
52 S(SNK_DISCOVERY_DEBOUNCE), \
53 S(SNK_DISCOVERY_DEBOUNCE_DONE), \
54 S(SNK_WAIT_CAPABILITIES), \
55 S(SNK_NEGOTIATE_CAPABILITIES), \
56 S(SNK_NEGOTIATE_PPS_CAPABILITIES), \
57 S(SNK_TRANSITION_SINK), \
58 S(SNK_TRANSITION_SINK_VBUS), \
62 S(DEBUG_ACC_ATTACHED), \
63 S(AUDIO_ACC_ATTACHED), \
64 S(AUDIO_ACC_DEBOUNCE), \
67 S(HARD_RESET_START), \
68 S(SRC_HARD_RESET_VBUS_OFF), \
69 S(SRC_HARD_RESET_VBUS_ON), \
70 S(SNK_HARD_RESET_SINK_OFF), \
71 S(SNK_HARD_RESET_WAIT_VBUS), \
72 S(SNK_HARD_RESET_SINK_ON), \
79 S(DR_SWAP_SEND_TIMEOUT), \
81 S(DR_SWAP_CHANGE_DR), \
85 S(PR_SWAP_SEND_TIMEOUT), \
88 S(PR_SWAP_SRC_SNK_TRANSITION_OFF), \
89 S(PR_SWAP_SRC_SNK_SOURCE_OFF), \
90 S(PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED), \
91 S(PR_SWAP_SRC_SNK_SINK_ON), \
92 S(PR_SWAP_SNK_SRC_SINK_OFF), \
93 S(PR_SWAP_SNK_SRC_SOURCE_ON), \
94 S(PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP), \
96 S(VCONN_SWAP_ACCEPT), \
98 S(VCONN_SWAP_SEND_TIMEOUT), \
99 S(VCONN_SWAP_CANCEL), \
100 S(VCONN_SWAP_START), \
101 S(VCONN_SWAP_WAIT_FOR_VCONN), \
102 S(VCONN_SWAP_TURN_ON_VCONN), \
103 S(VCONN_SWAP_TURN_OFF_VCONN), \
107 S(SNK_TRY_WAIT_DEBOUNCE), \
108 S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \
110 S(SRC_TRYWAIT_DEBOUNCE), \
111 S(SRC_TRYWAIT_UNATTACHED), \
115 S(SRC_TRY_DEBOUNCE), \
117 S(SNK_TRYWAIT_DEBOUNCE), \
118 S(SNK_TRYWAIT_VBUS), \
121 S(GET_STATUS_SEND), \
122 S(GET_STATUS_SEND_TIMEOUT), \
123 S(GET_PPS_STATUS_SEND), \
124 S(GET_PPS_STATUS_SEND_TIMEOUT), \
128 S(PORT_RESET_WAIT_OFF)
130 #define GENERATE_ENUM(e) e
131 #define GENERATE_STRING(s) #s
134 FOREACH_STATE(GENERATE_ENUM)
137 static const char * const tcpm_states[] = {
138 FOREACH_STATE(GENERATE_STRING)
142 VDM_STATE_ERR_BUSY = -3,
143 VDM_STATE_ERR_SEND = -2,
144 VDM_STATE_ERR_TMOUT = -1,
146 /* Anything >0 represents an active state */
149 VDM_STATE_WAIT_RSP_BUSY = 3,
152 enum pd_msg_request {
156 PD_MSG_CTRL_NOT_SUPP,
157 PD_MSG_DATA_SINK_CAP,
158 PD_MSG_DATA_SOURCE_CAP,
161 /* Events from low level driver */
163 #define TCPM_CC_EVENT BIT(0)
164 #define TCPM_VBUS_EVENT BIT(1)
165 #define TCPM_RESET_EVENT BIT(2)
167 #define LOG_BUFFER_ENTRIES 1024
168 #define LOG_BUFFER_ENTRY_SIZE 128
170 /* Alternate mode support */
172 #define SVID_DISCOVERY_MAX 16
173 #define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX)
175 struct pd_mode_data {
176 int svid_index; /* current SVID index */
178 u16 svids[SVID_DISCOVERY_MAX];
179 int altmodes; /* number of alternate modes */
180 struct typec_altmode_desc altmode_desc[ALTMODE_DISCOVERY_MAX];
196 struct mutex lock; /* tcpm state machine lock */
197 struct workqueue_struct *wq;
199 struct typec_capability typec_caps;
200 struct typec_port *typec_port;
202 struct tcpc_dev *tcpc;
203 struct usb_role_switch *role_sw;
205 enum typec_role vconn_role;
206 enum typec_role pwr_role;
207 enum typec_data_role data_role;
208 enum typec_pwr_opmode pwr_opmode;
210 struct usb_pd_identity partner_ident;
211 struct typec_partner_desc partner_desc;
212 struct typec_partner *partner;
214 enum typec_cc_status cc_req;
216 enum typec_cc_status cc1;
217 enum typec_cc_status cc2;
218 enum typec_cc_polarity polarity;
222 enum typec_port_type port_type;
235 enum pd_msg_request queued_message;
237 enum tcpm_state enter_state;
238 enum tcpm_state prev_state;
239 enum tcpm_state state;
240 enum tcpm_state delayed_state;
241 unsigned long delayed_runtime;
242 unsigned long delay_ms;
244 spinlock_t pd_event_lock;
247 struct work_struct event_work;
248 struct delayed_work state_machine;
249 struct delayed_work vdm_state_machine;
250 bool state_machine_running;
252 struct completion tx_complete;
253 enum tcpm_transmit_status tx_status;
255 struct mutex swap_lock; /* swap command lock */
257 bool non_pd_role_swap;
258 struct completion swap_complete;
261 unsigned int negotiated_rev;
262 unsigned int message_id;
263 unsigned int caps_count;
264 unsigned int hard_reset_count;
266 bool explicit_contract;
267 unsigned int rx_msgid;
269 /* Partner capabilities/requests */
271 u32 source_caps[PDO_MAX_OBJECTS];
272 unsigned int nr_source_caps;
273 u32 sink_caps[PDO_MAX_OBJECTS];
274 unsigned int nr_sink_caps;
276 /* Local capabilities */
277 u32 src_pdo[PDO_MAX_OBJECTS];
278 unsigned int nr_src_pdo;
279 u32 snk_pdo[PDO_MAX_OBJECTS];
280 unsigned int nr_snk_pdo;
281 u32 snk_vdo[VDO_MAX_OBJECTS];
282 unsigned int nr_snk_vdo;
284 unsigned int operating_snk_mw;
285 bool update_sink_caps;
287 /* Requested current / voltage */
291 /* Used to export TA voltage and current */
292 struct power_supply *psy;
293 struct power_supply_desc psy_desc;
294 enum power_supply_usb_type usb_type;
298 /* PD state for Vendor Defined Messages */
299 enum vdm_states vdm_state;
301 /* next Vendor Defined Message to send */
302 u32 vdo_data[VDO_MAX_SIZE];
304 /* VDO to retry if UFP responder replied busy */
308 struct pd_pps_data pps_data;
309 struct completion pps_complete;
313 /* Alternate mode data */
314 struct pd_mode_data mode_data;
315 struct typec_altmode *partner_altmode[ALTMODE_DISCOVERY_MAX];
316 struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX];
318 /* Deadline in jiffies to exit src_try_wait state */
319 unsigned long max_wait;
321 /* port belongs to a self powered device */
324 #ifdef CONFIG_DEBUG_FS
325 struct dentry *dentry;
326 struct mutex logbuffer_lock; /* log buffer access lock */
329 u8 *logbuffer[LOG_BUFFER_ENTRIES];
334 struct work_struct work;
335 struct tcpm_port *port;
336 struct pd_message msg;
339 #define tcpm_cc_is_sink(cc) \
340 ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \
341 (cc) == TYPEC_CC_RP_3_0)
343 #define tcpm_port_is_sink(port) \
344 ((tcpm_cc_is_sink((port)->cc1) && !tcpm_cc_is_sink((port)->cc2)) || \
345 (tcpm_cc_is_sink((port)->cc2) && !tcpm_cc_is_sink((port)->cc1)))
347 #define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD)
348 #define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA)
349 #define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN)
351 #define tcpm_port_is_source(port) \
352 ((tcpm_cc_is_source((port)->cc1) && \
353 !tcpm_cc_is_source((port)->cc2)) || \
354 (tcpm_cc_is_source((port)->cc2) && \
355 !tcpm_cc_is_source((port)->cc1)))
357 #define tcpm_port_is_debug(port) \
358 (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2))
360 #define tcpm_port_is_audio(port) \
361 (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2))
363 #define tcpm_port_is_audio_detached(port) \
364 ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \
365 (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1)))
367 #define tcpm_try_snk(port) \
368 ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \
369 (port)->port_type == TYPEC_PORT_DRP)
371 #define tcpm_try_src(port) \
372 ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \
373 (port)->port_type == TYPEC_PORT_DRP)
375 static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
377 if (port->port_type == TYPEC_PORT_DRP) {
378 if (port->try_role == TYPEC_SINK)
379 return SNK_UNATTACHED;
380 else if (port->try_role == TYPEC_SOURCE)
381 return SRC_UNATTACHED;
382 else if (port->tcpc->config->default_role == TYPEC_SINK)
383 return SNK_UNATTACHED;
384 /* Fall through to return SRC_UNATTACHED */
385 } else if (port->port_type == TYPEC_PORT_SNK) {
386 return SNK_UNATTACHED;
388 return SRC_UNATTACHED;
392 struct tcpm_port *typec_cap_to_tcpm(const struct typec_capability *cap)
394 return container_of(cap, struct tcpm_port, typec_caps);
397 static bool tcpm_port_is_disconnected(struct tcpm_port *port)
399 return (!port->attached && port->cc1 == TYPEC_CC_OPEN &&
400 port->cc2 == TYPEC_CC_OPEN) ||
401 (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 &&
402 port->cc1 == TYPEC_CC_OPEN) ||
403 (port->polarity == TYPEC_POLARITY_CC2 &&
404 port->cc2 == TYPEC_CC_OPEN)));
411 #ifdef CONFIG_DEBUG_FS
413 static bool tcpm_log_full(struct tcpm_port *port)
415 return port->logbuffer_tail ==
416 (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
420 static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args)
422 char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
423 u64 ts_nsec = local_clock();
424 unsigned long rem_nsec;
426 mutex_lock(&port->logbuffer_lock);
427 if (!port->logbuffer[port->logbuffer_head]) {
428 port->logbuffer[port->logbuffer_head] =
429 kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
430 if (!port->logbuffer[port->logbuffer_head]) {
431 mutex_unlock(&port->logbuffer_lock);
436 vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
438 if (tcpm_log_full(port)) {
439 port->logbuffer_head = max(port->logbuffer_head - 1, 0);
440 strcpy(tmpbuffer, "overflow");
443 if (port->logbuffer_head < 0 ||
444 port->logbuffer_head >= LOG_BUFFER_ENTRIES) {
446 "Bad log buffer index %d\n", port->logbuffer_head);
450 if (!port->logbuffer[port->logbuffer_head]) {
452 "Log buffer index %d is NULL\n", port->logbuffer_head);
456 rem_nsec = do_div(ts_nsec, 1000000000);
457 scnprintf(port->logbuffer[port->logbuffer_head],
458 LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
459 (unsigned long)ts_nsec, rem_nsec / 1000,
461 port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
464 mutex_unlock(&port->logbuffer_lock);
468 static void tcpm_log(struct tcpm_port *port, const char *fmt, ...)
472 /* Do not log while disconnected and unattached */
473 if (tcpm_port_is_disconnected(port) &&
474 (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED ||
475 port->state == DRP_TOGGLING))
479 _tcpm_log(port, fmt, args);
484 static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...)
489 _tcpm_log(port, fmt, args);
493 static void tcpm_log_source_caps(struct tcpm_port *port)
497 for (i = 0; i < port->nr_source_caps; i++) {
498 u32 pdo = port->source_caps[i];
499 enum pd_pdo_type type = pdo_type(pdo);
504 scnprintf(msg, sizeof(msg),
505 "%u mV, %u mA [%s%s%s%s%s%s]",
506 pdo_fixed_voltage(pdo),
507 pdo_max_current(pdo),
508 (pdo & PDO_FIXED_DUAL_ROLE) ?
510 (pdo & PDO_FIXED_SUSPEND) ?
512 (pdo & PDO_FIXED_HIGHER_CAP) ?
514 (pdo & PDO_FIXED_USB_COMM) ?
516 (pdo & PDO_FIXED_DATA_SWAP) ?
518 (pdo & PDO_FIXED_EXTPOWER) ?
522 scnprintf(msg, sizeof(msg),
524 pdo_min_voltage(pdo),
525 pdo_max_voltage(pdo),
526 pdo_max_current(pdo));
529 scnprintf(msg, sizeof(msg),
531 pdo_min_voltage(pdo),
532 pdo_max_voltage(pdo),
536 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS)
537 scnprintf(msg, sizeof(msg),
539 pdo_pps_apdo_min_voltage(pdo),
540 pdo_pps_apdo_max_voltage(pdo),
541 pdo_pps_apdo_max_current(pdo));
543 strcpy(msg, "undefined APDO");
546 strcpy(msg, "undefined");
549 tcpm_log(port, " PDO %d: type %d, %s",
554 static int tcpm_debug_show(struct seq_file *s, void *v)
556 struct tcpm_port *port = (struct tcpm_port *)s->private;
559 mutex_lock(&port->logbuffer_lock);
560 tail = port->logbuffer_tail;
561 while (tail != port->logbuffer_head) {
562 seq_printf(s, "%s\n", port->logbuffer[tail]);
563 tail = (tail + 1) % LOG_BUFFER_ENTRIES;
565 if (!seq_has_overflowed(s))
566 port->logbuffer_tail = tail;
567 mutex_unlock(&port->logbuffer_lock);
571 DEFINE_SHOW_ATTRIBUTE(tcpm_debug);
573 static struct dentry *rootdir;
575 static void tcpm_debugfs_init(struct tcpm_port *port)
577 mutex_init(&port->logbuffer_lock);
578 /* /sys/kernel/debug/tcpm/usbcX */
580 rootdir = debugfs_create_dir("tcpm", NULL);
582 port->dentry = debugfs_create_file(dev_name(port->dev),
583 S_IFREG | 0444, rootdir,
584 port, &tcpm_debug_fops);
587 static void tcpm_debugfs_exit(struct tcpm_port *port)
589 debugfs_remove(port->dentry);
595 static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { }
597 static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { }
598 static void tcpm_log_source_caps(struct tcpm_port *port) { }
599 static void tcpm_debugfs_init(const struct tcpm_port *port) { }
600 static void tcpm_debugfs_exit(const struct tcpm_port *port) { }
604 static int tcpm_pd_transmit(struct tcpm_port *port,
605 enum tcpm_transmit_type type,
606 const struct pd_message *msg)
608 unsigned long timeout;
612 tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header));
614 tcpm_log(port, "PD TX, type: %#x", type);
616 reinit_completion(&port->tx_complete);
617 ret = port->tcpc->pd_transmit(port->tcpc, type, msg);
621 mutex_unlock(&port->lock);
622 timeout = wait_for_completion_timeout(&port->tx_complete,
623 msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT));
624 mutex_lock(&port->lock);
628 switch (port->tx_status) {
629 case TCPC_TX_SUCCESS:
630 port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK;
632 case TCPC_TX_DISCARDED:
640 void tcpm_pd_transmit_complete(struct tcpm_port *port,
641 enum tcpm_transmit_status status)
643 tcpm_log(port, "PD TX complete, status: %u", status);
644 port->tx_status = status;
645 complete(&port->tx_complete);
647 EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete);
649 static int tcpm_mux_set(struct tcpm_port *port, int state,
650 enum usb_role usb_role,
651 enum typec_orientation orientation)
655 tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d",
656 state, usb_role, orientation);
658 ret = typec_set_orientation(port->typec_port, orientation);
663 ret = usb_role_switch_set_role(port->role_sw, usb_role);
668 return typec_set_mode(port->typec_port, state);
671 static int tcpm_set_polarity(struct tcpm_port *port,
672 enum typec_cc_polarity polarity)
676 tcpm_log(port, "polarity %d", polarity);
678 ret = port->tcpc->set_polarity(port->tcpc, polarity);
682 port->polarity = polarity;
687 static int tcpm_set_vconn(struct tcpm_port *port, bool enable)
691 tcpm_log(port, "vconn:=%d", enable);
693 ret = port->tcpc->set_vconn(port->tcpc, enable);
695 port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK;
696 typec_set_vconn_role(port->typec_port, port->vconn_role);
702 static u32 tcpm_get_current_limit(struct tcpm_port *port)
704 enum typec_cc_status cc;
707 cc = port->polarity ? port->cc2 : port->cc1;
709 case TYPEC_CC_RP_1_5:
712 case TYPEC_CC_RP_3_0:
715 case TYPEC_CC_RP_DEF:
717 if (port->tcpc->get_current_limit)
718 limit = port->tcpc->get_current_limit(port->tcpc);
727 static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv)
729 int ret = -EOPNOTSUPP;
731 tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma);
733 port->supply_voltage = mv;
734 port->current_limit = max_ma;
736 if (port->tcpc->set_current_limit)
737 ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv);
743 * Determine RP value to set based on maximum current supported
744 * by a port if configured as source.
745 * Returns CC value to report to link partner.
747 static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port)
749 const u32 *src_pdo = port->src_pdo;
750 int nr_pdo = port->nr_src_pdo;
754 * Search for first entry with matching voltage.
755 * It should report the maximum supported current.
757 for (i = 0; i < nr_pdo; i++) {
758 const u32 pdo = src_pdo[i];
760 if (pdo_type(pdo) == PDO_TYPE_FIXED &&
761 pdo_fixed_voltage(pdo) == 5000) {
762 unsigned int curr = pdo_max_current(pdo);
765 return TYPEC_CC_RP_3_0;
766 else if (curr >= 1500)
767 return TYPEC_CC_RP_1_5;
768 return TYPEC_CC_RP_DEF;
772 return TYPEC_CC_RP_DEF;
775 static int tcpm_set_attached_state(struct tcpm_port *port, bool attached)
777 return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role,
781 static int tcpm_set_roles(struct tcpm_port *port, bool attached,
782 enum typec_role role, enum typec_data_role data)
784 enum typec_orientation orientation;
785 enum usb_role usb_role;
788 if (port->polarity == TYPEC_POLARITY_CC1)
789 orientation = TYPEC_ORIENTATION_NORMAL;
791 orientation = TYPEC_ORIENTATION_REVERSE;
793 if (data == TYPEC_HOST)
794 usb_role = USB_ROLE_HOST;
796 usb_role = USB_ROLE_DEVICE;
798 ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation);
802 ret = port->tcpc->set_roles(port->tcpc, attached, role, data);
806 port->pwr_role = role;
807 port->data_role = data;
808 typec_set_data_role(port->typec_port, data);
809 typec_set_pwr_role(port->typec_port, role);
814 static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role)
818 ret = port->tcpc->set_roles(port->tcpc, true, role,
823 port->pwr_role = role;
824 typec_set_pwr_role(port->typec_port, role);
829 static int tcpm_pd_send_source_caps(struct tcpm_port *port)
831 struct pd_message msg;
834 memset(&msg, 0, sizeof(msg));
835 if (!port->nr_src_pdo) {
836 /* No source capabilities defined, sink only */
837 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
840 port->negotiated_rev,
841 port->message_id, 0);
843 msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP,
846 port->negotiated_rev,
850 for (i = 0; i < port->nr_src_pdo; i++)
851 msg.payload[i] = cpu_to_le32(port->src_pdo[i]);
853 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
856 static int tcpm_pd_send_sink_caps(struct tcpm_port *port)
858 struct pd_message msg;
861 memset(&msg, 0, sizeof(msg));
862 if (!port->nr_snk_pdo) {
863 /* No sink capabilities defined, source only */
864 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
867 port->negotiated_rev,
868 port->message_id, 0);
870 msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP,
873 port->negotiated_rev,
877 for (i = 0; i < port->nr_snk_pdo; i++)
878 msg.payload[i] = cpu_to_le32(port->snk_pdo[i]);
880 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
883 static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state,
884 unsigned int delay_ms)
887 tcpm_log(port, "pending state change %s -> %s @ %u ms",
888 tcpm_states[port->state], tcpm_states[state],
890 port->delayed_state = state;
891 mod_delayed_work(port->wq, &port->state_machine,
892 msecs_to_jiffies(delay_ms));
893 port->delayed_runtime = jiffies + msecs_to_jiffies(delay_ms);
894 port->delay_ms = delay_ms;
896 tcpm_log(port, "state change %s -> %s",
897 tcpm_states[port->state], tcpm_states[state]);
898 port->delayed_state = INVALID_STATE;
899 port->prev_state = port->state;
902 * Don't re-queue the state machine work item if we're currently
903 * in the state machine and we're immediately changing states.
904 * tcpm_state_machine_work() will continue running the state
907 if (!port->state_machine_running)
908 mod_delayed_work(port->wq, &port->state_machine, 0);
912 static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state,
913 unsigned int delay_ms)
915 if (port->enter_state == port->state)
916 tcpm_set_state(port, state, delay_ms);
919 "skipped %sstate change %s -> %s [%u ms], context state %s",
920 delay_ms ? "delayed " : "",
921 tcpm_states[port->state], tcpm_states[state],
922 delay_ms, tcpm_states[port->enter_state]);
925 static void tcpm_queue_message(struct tcpm_port *port,
926 enum pd_msg_request message)
928 port->queued_message = message;
929 mod_delayed_work(port->wq, &port->state_machine, 0);
933 * VDM/VDO handling functions
935 static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
936 const u32 *data, int cnt)
938 port->vdo_count = cnt + 1;
939 port->vdo_data[0] = header;
940 memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt);
941 /* Set ready, vdm state machine will actually send */
942 port->vdm_retries = 0;
943 port->vdm_state = VDM_STATE_READY;
946 static void svdm_consume_identity(struct tcpm_port *port, const __le32 *payload,
949 u32 vdo = le32_to_cpu(payload[VDO_INDEX_IDH]);
950 u32 product = le32_to_cpu(payload[VDO_INDEX_PRODUCT]);
952 memset(&port->mode_data, 0, sizeof(port->mode_data));
954 port->partner_ident.id_header = vdo;
955 port->partner_ident.cert_stat = le32_to_cpu(payload[VDO_INDEX_CSTAT]);
956 port->partner_ident.product = product;
958 typec_partner_set_identity(port->partner);
960 tcpm_log(port, "Identity: %04x:%04x.%04x",
962 PD_PRODUCT_PID(product), product & 0xffff);
965 static bool svdm_consume_svids(struct tcpm_port *port, const __le32 *payload,
968 struct pd_mode_data *pmdata = &port->mode_data;
971 for (i = 1; i < cnt; i++) {
972 u32 p = le32_to_cpu(payload[i]);
975 svid = (p >> 16) & 0xffff;
979 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
982 pmdata->svids[pmdata->nsvids++] = svid;
983 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
989 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
992 pmdata->svids[pmdata->nsvids++] = svid;
993 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
997 tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX);
1001 static void svdm_consume_modes(struct tcpm_port *port, const __le32 *payload,
1004 struct pd_mode_data *pmdata = &port->mode_data;
1005 struct typec_altmode_desc *paltmode;
1008 if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) {
1009 /* Already logged in svdm_consume_svids() */
1013 for (i = 1; i < cnt; i++) {
1014 paltmode = &pmdata->altmode_desc[pmdata->altmodes];
1015 memset(paltmode, 0, sizeof(*paltmode));
1017 paltmode->svid = pmdata->svids[pmdata->svid_index];
1019 paltmode->vdo = le32_to_cpu(payload[i]);
1021 tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x",
1022 pmdata->altmodes, paltmode->svid,
1023 paltmode->mode, paltmode->vdo);
1029 static void tcpm_register_partner_altmodes(struct tcpm_port *port)
1031 struct pd_mode_data *modep = &port->mode_data;
1032 struct typec_altmode *altmode;
1035 for (i = 0; i < modep->altmodes; i++) {
1036 altmode = typec_partner_register_altmode(port->partner,
1037 &modep->altmode_desc[i]);
1039 tcpm_log(port, "Failed to register partner SVID 0x%04x",
1040 modep->altmode_desc[i].svid);
1041 port->partner_altmode[i] = altmode;
1045 #define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header)
1047 static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt,
1050 struct typec_altmode *adev;
1051 struct typec_altmode *pdev;
1052 struct pd_mode_data *modep;
1053 u32 p[PD_MAX_PAYLOAD];
1059 for (i = 0; i < cnt; i++)
1060 p[i] = le32_to_cpu(payload[i]);
1062 cmd_type = PD_VDO_CMDT(p[0]);
1063 cmd = PD_VDO_CMD(p[0]);
1065 tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d",
1066 p[0], cmd_type, cmd, cnt);
1068 modep = &port->mode_data;
1070 adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX,
1071 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1073 pdev = typec_match_altmode(port->partner_altmode, ALTMODE_DISCOVERY_MAX,
1074 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1079 case CMD_DISCOVER_IDENT:
1080 /* 6.4.4.3.1: Only respond as UFP (device) */
1081 if (port->data_role == TYPEC_DEVICE &&
1083 for (i = 0; i < port->nr_snk_vdo; i++)
1084 response[i + 1] = port->snk_vdo[i];
1085 rlen = port->nr_snk_vdo + 1;
1088 case CMD_DISCOVER_SVID:
1090 case CMD_DISCOVER_MODES:
1092 case CMD_ENTER_MODE:
1097 /* Attention command does not have response */
1098 typec_altmode_attention(adev, p[1]);
1104 response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK);
1105 } else if (rlen == 0) {
1106 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
1109 response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY);
1114 /* silently drop message if we are not connected */
1115 if (IS_ERR_OR_NULL(port->partner))
1119 case CMD_DISCOVER_IDENT:
1121 svdm_consume_identity(port, payload, cnt);
1122 response[0] = VDO(USB_SID_PD, 1, CMD_DISCOVER_SVID);
1125 case CMD_DISCOVER_SVID:
1127 if (svdm_consume_svids(port, payload, cnt)) {
1128 response[0] = VDO(USB_SID_PD, 1,
1131 } else if (modep->nsvids && supports_modal(port)) {
1132 response[0] = VDO(modep->svids[0], 1,
1133 CMD_DISCOVER_MODES);
1137 case CMD_DISCOVER_MODES:
1139 svdm_consume_modes(port, payload, cnt);
1140 modep->svid_index++;
1141 if (modep->svid_index < modep->nsvids) {
1142 u16 svid = modep->svids[modep->svid_index];
1143 response[0] = VDO(svid, 1, CMD_DISCOVER_MODES);
1146 tcpm_register_partner_altmodes(port);
1149 case CMD_ENTER_MODE:
1150 typec_altmode_update_active(pdev, true);
1152 if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
1153 response[0] = VDO(adev->svid, 1, CMD_EXIT_MODE);
1154 response[0] |= VDO_OPOS(adev->mode);
1159 typec_altmode_update_active(pdev, false);
1161 /* Back to USB Operation */
1162 WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB,
1171 case CMD_ENTER_MODE:
1172 /* Back to USB Operation */
1173 WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB,
1184 /* Informing the alternate mode drivers about everything */
1185 typec_altmode_vdm(adev, p[0], &p[1], cnt);
1190 static void tcpm_handle_vdm_request(struct tcpm_port *port,
1191 const __le32 *payload, int cnt)
1194 u32 response[8] = { };
1195 u32 p0 = le32_to_cpu(payload[0]);
1197 if (port->vdm_state == VDM_STATE_BUSY) {
1198 /* If UFP responded busy retry after timeout */
1199 if (PD_VDO_CMDT(p0) == CMDT_RSP_BUSY) {
1200 port->vdm_state = VDM_STATE_WAIT_RSP_BUSY;
1201 port->vdo_retry = (p0 & ~VDO_CMDT_MASK) |
1203 mod_delayed_work(port->wq, &port->vdm_state_machine,
1204 msecs_to_jiffies(PD_T_VDM_BUSY));
1207 port->vdm_state = VDM_STATE_DONE;
1210 if (PD_VDO_SVDM(p0))
1211 rlen = tcpm_pd_svdm(port, payload, cnt, response);
1214 tcpm_queue_vdm(port, response[0], &response[1], rlen - 1);
1215 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1219 static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd,
1220 const u32 *data, int count)
1224 if (WARN_ON(count > VDO_MAX_SIZE - 1))
1225 count = VDO_MAX_SIZE - 1;
1227 /* set VDM header with VID & CMD */
1228 header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ?
1229 1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION), cmd);
1230 tcpm_queue_vdm(port, header, data, count);
1232 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1235 static unsigned int vdm_ready_timeout(u32 vdm_hdr)
1237 unsigned int timeout;
1238 int cmd = PD_VDO_CMD(vdm_hdr);
1240 /* its not a structured VDM command */
1241 if (!PD_VDO_SVDM(vdm_hdr))
1242 return PD_T_VDM_UNSTRUCTURED;
1244 switch (PD_VDO_CMDT(vdm_hdr)) {
1246 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1247 timeout = PD_T_VDM_WAIT_MODE_E;
1249 timeout = PD_T_VDM_SNDR_RSP;
1252 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1253 timeout = PD_T_VDM_E_MODE;
1255 timeout = PD_T_VDM_RCVR_RSP;
1261 static void vdm_run_state_machine(struct tcpm_port *port)
1263 struct pd_message msg;
1266 switch (port->vdm_state) {
1267 case VDM_STATE_READY:
1268 /* Only transmit VDM if attached */
1269 if (!port->attached) {
1270 port->vdm_state = VDM_STATE_ERR_BUSY;
1275 * if there's traffic or we're not in PDO ready state don't send
1278 if (port->state != SRC_READY && port->state != SNK_READY)
1281 /* Prepare and send VDM */
1282 memset(&msg, 0, sizeof(msg));
1283 msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF,
1286 port->negotiated_rev,
1287 port->message_id, port->vdo_count);
1288 for (i = 0; i < port->vdo_count; i++)
1289 msg.payload[i] = cpu_to_le32(port->vdo_data[i]);
1290 res = tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
1292 port->vdm_state = VDM_STATE_ERR_SEND;
1294 unsigned long timeout;
1296 port->vdm_retries = 0;
1297 port->vdm_state = VDM_STATE_BUSY;
1298 timeout = vdm_ready_timeout(port->vdo_data[0]);
1299 mod_delayed_work(port->wq, &port->vdm_state_machine,
1303 case VDM_STATE_WAIT_RSP_BUSY:
1304 port->vdo_data[0] = port->vdo_retry;
1305 port->vdo_count = 1;
1306 port->vdm_state = VDM_STATE_READY;
1308 case VDM_STATE_BUSY:
1309 port->vdm_state = VDM_STATE_ERR_TMOUT;
1311 case VDM_STATE_ERR_SEND:
1313 * A partner which does not support USB PD will not reply,
1314 * so this is not a fatal error. At the same time, some
1315 * devices may not return GoodCRC under some circumstances,
1316 * so we need to retry.
1318 if (port->vdm_retries < 3) {
1319 tcpm_log(port, "VDM Tx error, retry");
1320 port->vdm_retries++;
1321 port->vdm_state = VDM_STATE_READY;
1329 static void vdm_state_machine_work(struct work_struct *work)
1331 struct tcpm_port *port = container_of(work, struct tcpm_port,
1332 vdm_state_machine.work);
1333 enum vdm_states prev_state;
1335 mutex_lock(&port->lock);
1338 * Continue running as long as the port is not busy and there was
1342 prev_state = port->vdm_state;
1343 vdm_run_state_machine(port);
1344 } while (port->vdm_state != prev_state &&
1345 port->vdm_state != VDM_STATE_BUSY);
1347 mutex_unlock(&port->lock);
1353 PDO_ERR_VSAFE5V_NOT_FIRST,
1354 PDO_ERR_PDO_TYPE_NOT_IN_ORDER,
1355 PDO_ERR_FIXED_NOT_SORTED,
1356 PDO_ERR_VARIABLE_BATT_NOT_SORTED,
1358 PDO_ERR_PPS_APDO_NOT_SORTED,
1359 PDO_ERR_DUPE_PPS_APDO,
1362 static const char * const pdo_err_msg[] = {
1363 [PDO_ERR_NO_VSAFE5V] =
1364 " err: source/sink caps should atleast have vSafe5V",
1365 [PDO_ERR_VSAFE5V_NOT_FIRST] =
1366 " err: vSafe5V Fixed Supply Object Shall always be the first object",
1367 [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] =
1368 " err: PDOs should be in the following order: Fixed; Battery; Variable",
1369 [PDO_ERR_FIXED_NOT_SORTED] =
1370 " err: Fixed supply pdos should be in increasing order of their fixed voltage",
1371 [PDO_ERR_VARIABLE_BATT_NOT_SORTED] =
1372 " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage",
1373 [PDO_ERR_DUPE_PDO] =
1374 " err: Variable/Batt supply pdos cannot have same min/max voltage",
1375 [PDO_ERR_PPS_APDO_NOT_SORTED] =
1376 " err: Programmable power supply apdos should be in increasing order of their maximum voltage",
1377 [PDO_ERR_DUPE_PPS_APDO] =
1378 " err: Programmable power supply apdos cannot have same min/max voltage and max current",
1381 static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo,
1382 unsigned int nr_pdo)
1386 /* Should at least contain vSafe5v */
1388 return PDO_ERR_NO_VSAFE5V;
1390 /* The vSafe5V Fixed Supply Object Shall always be the first object */
1391 if (pdo_type(pdo[0]) != PDO_TYPE_FIXED ||
1392 pdo_fixed_voltage(pdo[0]) != VSAFE5V)
1393 return PDO_ERR_VSAFE5V_NOT_FIRST;
1395 for (i = 1; i < nr_pdo; i++) {
1396 if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) {
1397 return PDO_ERR_PDO_TYPE_NOT_IN_ORDER;
1398 } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) {
1399 enum pd_pdo_type type = pdo_type(pdo[i]);
1403 * The remaining Fixed Supply Objects, if
1404 * present, shall be sent in voltage order;
1405 * lowest to highest.
1407 case PDO_TYPE_FIXED:
1408 if (pdo_fixed_voltage(pdo[i]) <=
1409 pdo_fixed_voltage(pdo[i - 1]))
1410 return PDO_ERR_FIXED_NOT_SORTED;
1413 * The Battery Supply Objects and Variable
1414 * supply, if present shall be sent in Minimum
1415 * Voltage order; lowest to highest.
1419 if (pdo_min_voltage(pdo[i]) <
1420 pdo_min_voltage(pdo[i - 1]))
1421 return PDO_ERR_VARIABLE_BATT_NOT_SORTED;
1422 else if ((pdo_min_voltage(pdo[i]) ==
1423 pdo_min_voltage(pdo[i - 1])) &&
1424 (pdo_max_voltage(pdo[i]) ==
1425 pdo_min_voltage(pdo[i - 1])))
1426 return PDO_ERR_DUPE_PDO;
1429 * The Programmable Power Supply APDOs, if present,
1430 * shall be sent in Maximum Voltage order;
1431 * lowest to highest.
1434 if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS)
1437 if (pdo_pps_apdo_max_voltage(pdo[i]) <
1438 pdo_pps_apdo_max_voltage(pdo[i - 1]))
1439 return PDO_ERR_PPS_APDO_NOT_SORTED;
1440 else if (pdo_pps_apdo_min_voltage(pdo[i]) ==
1441 pdo_pps_apdo_min_voltage(pdo[i - 1]) &&
1442 pdo_pps_apdo_max_voltage(pdo[i]) ==
1443 pdo_pps_apdo_max_voltage(pdo[i - 1]) &&
1444 pdo_pps_apdo_max_current(pdo[i]) ==
1445 pdo_pps_apdo_max_current(pdo[i - 1]))
1446 return PDO_ERR_DUPE_PPS_APDO;
1449 tcpm_log_force(port, " Unknown pdo type");
1457 static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo,
1458 unsigned int nr_pdo)
1460 enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo);
1462 if (err_index != PDO_NO_ERR) {
1463 tcpm_log_force(port, " %s", pdo_err_msg[err_index]);
1470 static int tcpm_altmode_enter(struct typec_altmode *altmode)
1472 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1475 mutex_lock(&port->lock);
1476 header = VDO(altmode->svid, 1, CMD_ENTER_MODE);
1477 header |= VDO_OPOS(altmode->mode);
1479 tcpm_queue_vdm(port, header, NULL, 0);
1480 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1481 mutex_unlock(&port->lock);
1486 static int tcpm_altmode_exit(struct typec_altmode *altmode)
1488 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1491 mutex_lock(&port->lock);
1492 header = VDO(altmode->svid, 1, CMD_EXIT_MODE);
1493 header |= VDO_OPOS(altmode->mode);
1495 tcpm_queue_vdm(port, header, NULL, 0);
1496 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1497 mutex_unlock(&port->lock);
1502 static int tcpm_altmode_vdm(struct typec_altmode *altmode,
1503 u32 header, const u32 *data, int count)
1505 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1507 mutex_lock(&port->lock);
1508 tcpm_queue_vdm(port, header, data, count - 1);
1509 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1510 mutex_unlock(&port->lock);
1515 static const struct typec_altmode_ops tcpm_altmode_ops = {
1516 .enter = tcpm_altmode_enter,
1517 .exit = tcpm_altmode_exit,
1518 .vdm = tcpm_altmode_vdm,
1522 * PD (data, control) command handling functions
1524 static inline enum tcpm_state ready_state(struct tcpm_port *port)
1526 if (port->pwr_role == TYPEC_SOURCE)
1532 static int tcpm_pd_send_control(struct tcpm_port *port,
1533 enum pd_ctrl_msg_type type);
1535 static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload,
1538 u32 p0 = le32_to_cpu(payload[0]);
1539 unsigned int type = usb_pd_ado_type(p0);
1542 tcpm_log(port, "Alert message received with no type");
1546 /* Just handling non-battery alerts for now */
1547 if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) {
1548 switch (port->state) {
1551 tcpm_set_state(port, GET_STATUS_SEND, 0);
1554 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1560 static void tcpm_pd_data_request(struct tcpm_port *port,
1561 const struct pd_message *msg)
1563 enum pd_data_msg_type type = pd_header_type_le(msg->header);
1564 unsigned int cnt = pd_header_cnt_le(msg->header);
1565 unsigned int rev = pd_header_rev_le(msg->header);
1569 case PD_DATA_SOURCE_CAP:
1570 if (port->pwr_role != TYPEC_SINK)
1573 for (i = 0; i < cnt; i++)
1574 port->source_caps[i] = le32_to_cpu(msg->payload[i]);
1576 port->nr_source_caps = cnt;
1578 tcpm_log_source_caps(port);
1580 tcpm_validate_caps(port, port->source_caps,
1581 port->nr_source_caps);
1584 * Adjust revision in subsequent message headers, as required,
1585 * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
1586 * support Rev 1.0 so just do nothing in that scenario.
1588 if (rev == PD_REV10)
1591 if (rev < PD_MAX_REV)
1592 port->negotiated_rev = rev;
1595 * This message may be received even if VBUS is not
1596 * present. This is quite unexpected; see USB PD
1597 * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2.
1598 * However, at the same time, we must be ready to
1599 * receive this message and respond to it 15ms after
1600 * receiving PS_RDY during power swap operations, no matter
1601 * if VBUS is available or not (USB PD specification,
1603 * So we need to accept the message either way,
1604 * but be prepared to keep waiting for VBUS after it was
1607 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
1609 case PD_DATA_REQUEST:
1610 if (port->pwr_role != TYPEC_SOURCE ||
1612 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1617 * Adjust revision in subsequent message headers, as required,
1618 * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
1619 * support Rev 1.0 so just reject in that scenario.
1621 if (rev == PD_REV10) {
1622 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1626 if (rev < PD_MAX_REV)
1627 port->negotiated_rev = rev;
1629 port->sink_request = le32_to_cpu(msg->payload[0]);
1630 tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0);
1632 case PD_DATA_SINK_CAP:
1633 /* We don't do anything with this at the moment... */
1634 for (i = 0; i < cnt; i++)
1635 port->sink_caps[i] = le32_to_cpu(msg->payload[i]);
1636 port->nr_sink_caps = cnt;
1638 case PD_DATA_VENDOR_DEF:
1639 tcpm_handle_vdm_request(port, msg->payload, cnt);
1642 if (port->state == SRC_READY || port->state == SNK_READY) {
1643 port->bist_request = le32_to_cpu(msg->payload[0]);
1644 tcpm_set_state(port, BIST_RX, 0);
1648 tcpm_handle_alert(port, msg->payload, cnt);
1650 case PD_DATA_BATT_STATUS:
1651 case PD_DATA_GET_COUNTRY_INFO:
1652 /* Currently unsupported */
1653 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1656 tcpm_log(port, "Unhandled data message type %#x", type);
1661 static void tcpm_pps_complete(struct tcpm_port *port, int result)
1663 if (port->pps_pending) {
1664 port->pps_status = result;
1665 port->pps_pending = false;
1666 complete(&port->pps_complete);
1670 static void tcpm_pd_ctrl_request(struct tcpm_port *port,
1671 const struct pd_message *msg)
1673 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
1674 enum tcpm_state next_state;
1677 case PD_CTRL_GOOD_CRC:
1680 case PD_CTRL_GET_SOURCE_CAP:
1681 switch (port->state) {
1684 tcpm_queue_message(port, PD_MSG_DATA_SOURCE_CAP);
1687 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1691 case PD_CTRL_GET_SINK_CAP:
1692 switch (port->state) {
1695 tcpm_queue_message(port, PD_MSG_DATA_SINK_CAP);
1698 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1702 case PD_CTRL_GOTO_MIN:
1704 case PD_CTRL_PS_RDY:
1705 switch (port->state) {
1706 case SNK_TRANSITION_SINK:
1707 if (port->vbus_present) {
1708 tcpm_set_current_limit(port,
1709 port->current_limit,
1710 port->supply_voltage);
1711 port->explicit_contract = true;
1712 tcpm_set_state(port, SNK_READY, 0);
1715 * Seen after power swap. Keep waiting for VBUS
1716 * in a transitional state.
1718 tcpm_set_state(port,
1719 SNK_TRANSITION_SINK_VBUS, 0);
1722 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
1723 tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0);
1725 case PR_SWAP_SNK_SRC_SINK_OFF:
1726 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0);
1728 case VCONN_SWAP_WAIT_FOR_VCONN:
1729 tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0);
1735 case PD_CTRL_REJECT:
1737 case PD_CTRL_NOT_SUPP:
1738 switch (port->state) {
1739 case SNK_NEGOTIATE_CAPABILITIES:
1740 /* USB PD specification, Figure 8-43 */
1741 if (port->explicit_contract)
1742 next_state = SNK_READY;
1744 next_state = SNK_WAIT_CAPABILITIES;
1745 tcpm_set_state(port, next_state, 0);
1747 case SNK_NEGOTIATE_PPS_CAPABILITIES:
1748 /* Revert data back from any requested PPS updates */
1749 port->pps_data.out_volt = port->supply_voltage;
1750 port->pps_data.op_curr = port->current_limit;
1751 port->pps_status = (type == PD_CTRL_WAIT ?
1752 -EAGAIN : -EOPNOTSUPP);
1753 tcpm_set_state(port, SNK_READY, 0);
1756 port->swap_status = (type == PD_CTRL_WAIT ?
1757 -EAGAIN : -EOPNOTSUPP);
1758 tcpm_set_state(port, DR_SWAP_CANCEL, 0);
1761 port->swap_status = (type == PD_CTRL_WAIT ?
1762 -EAGAIN : -EOPNOTSUPP);
1763 tcpm_set_state(port, PR_SWAP_CANCEL, 0);
1765 case VCONN_SWAP_SEND:
1766 port->swap_status = (type == PD_CTRL_WAIT ?
1767 -EAGAIN : -EOPNOTSUPP);
1768 tcpm_set_state(port, VCONN_SWAP_CANCEL, 0);
1774 case PD_CTRL_ACCEPT:
1775 switch (port->state) {
1776 case SNK_NEGOTIATE_CAPABILITIES:
1777 port->pps_data.active = false;
1778 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
1780 case SNK_NEGOTIATE_PPS_CAPABILITIES:
1781 port->pps_data.active = true;
1782 port->supply_voltage = port->pps_data.out_volt;
1783 port->current_limit = port->pps_data.op_curr;
1784 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
1786 case SOFT_RESET_SEND:
1787 port->message_id = 0;
1788 port->rx_msgid = -1;
1789 if (port->pwr_role == TYPEC_SOURCE)
1790 next_state = SRC_SEND_CAPABILITIES;
1792 next_state = SNK_WAIT_CAPABILITIES;
1793 tcpm_set_state(port, next_state, 0);
1796 tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0);
1799 tcpm_set_state(port, PR_SWAP_START, 0);
1801 case VCONN_SWAP_SEND:
1802 tcpm_set_state(port, VCONN_SWAP_START, 0);
1808 case PD_CTRL_SOFT_RESET:
1809 tcpm_set_state(port, SOFT_RESET, 0);
1811 case PD_CTRL_DR_SWAP:
1812 if (port->port_type != TYPEC_PORT_DRP) {
1813 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1818 * 6.3.9: If an alternate mode is active, a request to swap
1819 * alternate modes shall trigger a port reset.
1821 switch (port->state) {
1824 tcpm_set_state(port, DR_SWAP_ACCEPT, 0);
1827 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1831 case PD_CTRL_PR_SWAP:
1832 if (port->port_type != TYPEC_PORT_DRP) {
1833 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1836 switch (port->state) {
1839 tcpm_set_state(port, PR_SWAP_ACCEPT, 0);
1842 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1846 case PD_CTRL_VCONN_SWAP:
1847 switch (port->state) {
1850 tcpm_set_state(port, VCONN_SWAP_ACCEPT, 0);
1853 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1857 case PD_CTRL_GET_SOURCE_CAP_EXT:
1858 case PD_CTRL_GET_STATUS:
1859 case PD_CTRL_FR_SWAP:
1860 case PD_CTRL_GET_PPS_STATUS:
1861 case PD_CTRL_GET_COUNTRY_CODES:
1862 /* Currently not supported */
1863 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1866 tcpm_log(port, "Unhandled ctrl message type %#x", type);
1871 static void tcpm_pd_ext_msg_request(struct tcpm_port *port,
1872 const struct pd_message *msg)
1874 enum pd_ext_msg_type type = pd_header_type_le(msg->header);
1875 unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header);
1877 if (!(msg->ext_msg.header & PD_EXT_HDR_CHUNKED)) {
1878 tcpm_log(port, "Unchunked extended messages unsupported");
1882 if (data_size > PD_EXT_MAX_CHUNK_DATA) {
1883 tcpm_log(port, "Chunk handling not yet supported");
1890 * If PPS related events raised then get PPS status to clear
1891 * (see USB PD 3.0 Spec, 6.5.2.4)
1893 if (msg->ext_msg.data[USB_PD_EXT_SDB_EVENT_FLAGS] &
1894 USB_PD_EXT_SDB_PPS_EVENTS)
1895 tcpm_set_state(port, GET_PPS_STATUS_SEND, 0);
1897 tcpm_set_state(port, ready_state(port), 0);
1899 case PD_EXT_PPS_STATUS:
1901 * For now the PPS status message is used to clear events
1904 tcpm_set_state(port, ready_state(port), 0);
1906 case PD_EXT_SOURCE_CAP_EXT:
1907 case PD_EXT_GET_BATT_CAP:
1908 case PD_EXT_GET_BATT_STATUS:
1909 case PD_EXT_BATT_CAP:
1910 case PD_EXT_GET_MANUFACTURER_INFO:
1911 case PD_EXT_MANUFACTURER_INFO:
1912 case PD_EXT_SECURITY_REQUEST:
1913 case PD_EXT_SECURITY_RESPONSE:
1914 case PD_EXT_FW_UPDATE_REQUEST:
1915 case PD_EXT_FW_UPDATE_RESPONSE:
1916 case PD_EXT_COUNTRY_INFO:
1917 case PD_EXT_COUNTRY_CODES:
1918 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1921 tcpm_log(port, "Unhandled extended message type %#x", type);
1926 static void tcpm_pd_rx_handler(struct work_struct *work)
1928 struct pd_rx_event *event = container_of(work,
1929 struct pd_rx_event, work);
1930 const struct pd_message *msg = &event->msg;
1931 unsigned int cnt = pd_header_cnt_le(msg->header);
1932 struct tcpm_port *port = event->port;
1934 mutex_lock(&port->lock);
1936 tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header),
1939 if (port->attached) {
1940 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
1941 unsigned int msgid = pd_header_msgid_le(msg->header);
1944 * USB PD standard, 6.6.1.2:
1945 * "... if MessageID value in a received Message is the
1946 * same as the stored value, the receiver shall return a
1947 * GoodCRC Message with that MessageID value and drop
1948 * the Message (this is a retry of an already received
1949 * Message). Note: this shall not apply to the Soft_Reset
1950 * Message which always has a MessageID value of zero."
1952 if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET)
1954 port->rx_msgid = msgid;
1957 * If both ends believe to be DFP/host, we have a data role
1960 if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) ==
1961 (port->data_role == TYPEC_HOST)) {
1963 "Data role mismatch, initiating error recovery");
1964 tcpm_set_state(port, ERROR_RECOVERY, 0);
1966 if (msg->header & PD_HEADER_EXT_HDR)
1967 tcpm_pd_ext_msg_request(port, msg);
1969 tcpm_pd_data_request(port, msg);
1971 tcpm_pd_ctrl_request(port, msg);
1976 mutex_unlock(&port->lock);
1980 void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg)
1982 struct pd_rx_event *event;
1984 event = kzalloc(sizeof(*event), GFP_ATOMIC);
1988 INIT_WORK(&event->work, tcpm_pd_rx_handler);
1990 memcpy(&event->msg, msg, sizeof(*msg));
1991 queue_work(port->wq, &event->work);
1993 EXPORT_SYMBOL_GPL(tcpm_pd_receive);
1995 static int tcpm_pd_send_control(struct tcpm_port *port,
1996 enum pd_ctrl_msg_type type)
1998 struct pd_message msg;
2000 memset(&msg, 0, sizeof(msg));
2001 msg.header = PD_HEADER_LE(type, port->pwr_role,
2003 port->negotiated_rev,
2004 port->message_id, 0);
2006 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2010 * Send queued message without affecting state.
2011 * Return true if state machine should go back to sleep,
2014 static bool tcpm_send_queued_message(struct tcpm_port *port)
2016 enum pd_msg_request queued_message;
2019 queued_message = port->queued_message;
2020 port->queued_message = PD_MSG_NONE;
2022 switch (queued_message) {
2023 case PD_MSG_CTRL_WAIT:
2024 tcpm_pd_send_control(port, PD_CTRL_WAIT);
2026 case PD_MSG_CTRL_REJECT:
2027 tcpm_pd_send_control(port, PD_CTRL_REJECT);
2029 case PD_MSG_CTRL_NOT_SUPP:
2030 tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP);
2032 case PD_MSG_DATA_SINK_CAP:
2033 tcpm_pd_send_sink_caps(port);
2035 case PD_MSG_DATA_SOURCE_CAP:
2036 tcpm_pd_send_source_caps(port);
2041 } while (port->queued_message != PD_MSG_NONE);
2043 if (port->delayed_state != INVALID_STATE) {
2044 if (time_is_after_jiffies(port->delayed_runtime)) {
2045 mod_delayed_work(port->wq, &port->state_machine,
2046 port->delayed_runtime - jiffies);
2049 port->delayed_state = INVALID_STATE;
2054 static int tcpm_pd_check_request(struct tcpm_port *port)
2056 u32 pdo, rdo = port->sink_request;
2057 unsigned int max, op, pdo_max, index;
2058 enum pd_pdo_type type;
2060 index = rdo_index(rdo);
2061 if (!index || index > port->nr_src_pdo)
2064 pdo = port->src_pdo[index - 1];
2065 type = pdo_type(pdo);
2067 case PDO_TYPE_FIXED:
2069 max = rdo_max_current(rdo);
2070 op = rdo_op_current(rdo);
2071 pdo_max = pdo_max_current(pdo);
2075 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
2078 if (type == PDO_TYPE_FIXED)
2080 "Requested %u mV, %u mA for %u / %u mA",
2081 pdo_fixed_voltage(pdo), pdo_max, op, max);
2084 "Requested %u -> %u mV, %u mA for %u / %u mA",
2085 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
2089 max = rdo_max_power(rdo);
2090 op = rdo_op_power(rdo);
2091 pdo_max = pdo_max_power(pdo);
2095 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
2098 "Requested %u -> %u mV, %u mW for %u / %u mW",
2099 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
2106 port->op_vsafe5v = index == 1;
2111 #define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y))
2112 #define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y))
2114 static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo,
2117 unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0,
2118 max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0,
2122 port->pps_data.supported = false;
2123 port->usb_type = POWER_SUPPLY_USB_TYPE_PD;
2126 * Select the source PDO providing the most power which has a
2129 for (i = 0; i < port->nr_source_caps; i++) {
2130 u32 pdo = port->source_caps[i];
2131 enum pd_pdo_type type = pdo_type(pdo);
2134 case PDO_TYPE_FIXED:
2135 max_src_mv = pdo_fixed_voltage(pdo);
2136 min_src_mv = max_src_mv;
2140 max_src_mv = pdo_max_voltage(pdo);
2141 min_src_mv = pdo_min_voltage(pdo);
2144 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) {
2145 port->pps_data.supported = true;
2147 POWER_SUPPLY_USB_TYPE_PD_PPS;
2151 tcpm_log(port, "Invalid source PDO type, ignoring");
2156 case PDO_TYPE_FIXED:
2158 src_ma = pdo_max_current(pdo);
2159 src_mw = src_ma * min_src_mv / 1000;
2162 src_mw = pdo_max_power(pdo);
2167 tcpm_log(port, "Invalid source PDO type, ignoring");
2171 for (j = 0; j < port->nr_snk_pdo; j++) {
2172 pdo = port->snk_pdo[j];
2174 switch (pdo_type(pdo)) {
2175 case PDO_TYPE_FIXED:
2176 max_snk_mv = pdo_fixed_voltage(pdo);
2177 min_snk_mv = max_snk_mv;
2181 max_snk_mv = pdo_max_voltage(pdo);
2182 min_snk_mv = pdo_min_voltage(pdo);
2187 tcpm_log(port, "Invalid sink PDO type, ignoring");
2191 if (max_src_mv <= max_snk_mv &&
2192 min_src_mv >= min_snk_mv) {
2193 /* Prefer higher voltages if available */
2194 if ((src_mw == max_mw && min_src_mv > max_mv) ||
2199 max_mv = min_src_mv;
2209 #define min_pps_apdo_current(x, y) \
2210 min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y))
2212 static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port)
2214 unsigned int i, j, max_mw = 0, max_mv = 0;
2215 unsigned int min_src_mv, max_src_mv, src_ma, src_mw;
2216 unsigned int min_snk_mv, max_snk_mv;
2217 unsigned int max_op_mv;
2219 unsigned int src_pdo = 0, snk_pdo = 0;
2222 * Select the source PPS APDO providing the most power while staying
2223 * within the board's limits. We skip the first PDO as this is always
2226 for (i = 1; i < port->nr_source_caps; ++i) {
2227 pdo = port->source_caps[i];
2229 switch (pdo_type(pdo)) {
2231 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2232 tcpm_log(port, "Not PPS APDO (source), ignoring");
2236 min_src_mv = pdo_pps_apdo_min_voltage(pdo);
2237 max_src_mv = pdo_pps_apdo_max_voltage(pdo);
2238 src_ma = pdo_pps_apdo_max_current(pdo);
2239 src_mw = (src_ma * max_src_mv) / 1000;
2242 * Now search through the sink PDOs to find a matching
2243 * PPS APDO. Again skip the first sink PDO as this will
2246 for (j = 1; j < port->nr_snk_pdo; j++) {
2247 pdo = port->snk_pdo[j];
2249 switch (pdo_type(pdo)) {
2251 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2253 "Not PPS APDO (sink), ignoring");
2258 pdo_pps_apdo_min_voltage(pdo);
2260 pdo_pps_apdo_max_voltage(pdo);
2264 "Not APDO type (sink), ignoring");
2268 if (min_src_mv <= max_snk_mv &&
2269 max_src_mv >= min_snk_mv) {
2270 max_op_mv = min(max_src_mv, max_snk_mv);
2271 src_mw = (max_op_mv * src_ma) / 1000;
2272 /* Prefer higher voltages if available */
2273 if ((src_mw == max_mw &&
2274 max_op_mv > max_mv) ||
2286 tcpm_log(port, "Not APDO type (source), ignoring");
2292 src = port->source_caps[src_pdo];
2293 snk = port->snk_pdo[snk_pdo];
2295 port->pps_data.min_volt = max(pdo_pps_apdo_min_voltage(src),
2296 pdo_pps_apdo_min_voltage(snk));
2297 port->pps_data.max_volt = min(pdo_pps_apdo_max_voltage(src),
2298 pdo_pps_apdo_max_voltage(snk));
2299 port->pps_data.max_curr = min_pps_apdo_current(src, snk);
2300 port->pps_data.out_volt = min(port->pps_data.max_volt,
2301 max(port->pps_data.min_volt,
2302 port->pps_data.out_volt));
2303 port->pps_data.op_curr = min(port->pps_data.max_curr,
2304 port->pps_data.op_curr);
2310 static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo)
2312 unsigned int mv, ma, mw, flags;
2313 unsigned int max_ma, max_mw;
2314 enum pd_pdo_type type;
2315 u32 pdo, matching_snk_pdo;
2316 int src_pdo_index = 0;
2317 int snk_pdo_index = 0;
2320 ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index);
2324 pdo = port->source_caps[src_pdo_index];
2325 matching_snk_pdo = port->snk_pdo[snk_pdo_index];
2326 type = pdo_type(pdo);
2329 case PDO_TYPE_FIXED:
2330 mv = pdo_fixed_voltage(pdo);
2334 mv = pdo_min_voltage(pdo);
2337 tcpm_log(port, "Invalid PDO selected!");
2341 /* Select maximum available current within the sink pdo's limit */
2342 if (type == PDO_TYPE_BATT) {
2343 mw = min_power(pdo, matching_snk_pdo);
2344 ma = 1000 * mw / mv;
2346 ma = min_current(pdo, matching_snk_pdo);
2347 mw = ma * mv / 1000;
2350 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
2352 /* Set mismatch bit if offered power is less than operating power */
2355 if (mw < port->operating_snk_mw) {
2356 flags |= RDO_CAP_MISMATCH;
2357 if (type == PDO_TYPE_BATT &&
2358 (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo)))
2359 max_mw = pdo_max_power(matching_snk_pdo);
2360 else if (pdo_max_current(matching_snk_pdo) >
2361 pdo_max_current(pdo))
2362 max_ma = pdo_max_current(matching_snk_pdo);
2365 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
2366 port->cc_req, port->cc1, port->cc2, port->vbus_source,
2367 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
2370 if (type == PDO_TYPE_BATT) {
2371 *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags);
2373 tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s",
2374 src_pdo_index, mv, mw,
2375 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
2377 *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags);
2379 tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s",
2380 src_pdo_index, mv, ma,
2381 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
2384 port->current_limit = ma;
2385 port->supply_voltage = mv;
2390 static int tcpm_pd_send_request(struct tcpm_port *port)
2392 struct pd_message msg;
2396 ret = tcpm_pd_build_request(port, &rdo);
2400 memset(&msg, 0, sizeof(msg));
2401 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
2404 port->negotiated_rev,
2405 port->message_id, 1);
2406 msg.payload[0] = cpu_to_le32(rdo);
2408 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2411 static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo)
2413 unsigned int out_mv, op_ma, op_mw, max_mv, max_ma, flags;
2414 enum pd_pdo_type type;
2415 unsigned int src_pdo_index;
2418 src_pdo_index = tcpm_pd_select_pps_apdo(port);
2422 pdo = port->source_caps[src_pdo_index];
2423 type = pdo_type(pdo);
2427 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2428 tcpm_log(port, "Invalid APDO selected!");
2431 max_mv = port->pps_data.max_volt;
2432 max_ma = port->pps_data.max_curr;
2433 out_mv = port->pps_data.out_volt;
2434 op_ma = port->pps_data.op_curr;
2437 tcpm_log(port, "Invalid PDO selected!");
2441 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
2443 op_mw = (op_ma * out_mv) / 1000;
2444 if (op_mw < port->operating_snk_mw) {
2446 * Try raising current to meet power needs. If that's not enough
2447 * then try upping the voltage. If that's still not enough
2448 * then we've obviously chosen a PPS APDO which really isn't
2449 * suitable so abandon ship.
2451 op_ma = (port->operating_snk_mw * 1000) / out_mv;
2452 if ((port->operating_snk_mw * 1000) % out_mv)
2454 op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP);
2456 if (op_ma > max_ma) {
2458 out_mv = (port->operating_snk_mw * 1000) / op_ma;
2459 if ((port->operating_snk_mw * 1000) % op_ma)
2461 out_mv += RDO_PROG_VOLT_MV_STEP -
2462 (out_mv % RDO_PROG_VOLT_MV_STEP);
2464 if (out_mv > max_mv) {
2465 tcpm_log(port, "Invalid PPS APDO selected!");
2471 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
2472 port->cc_req, port->cc1, port->cc2, port->vbus_source,
2473 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
2476 *rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags);
2478 tcpm_log(port, "Requesting APDO %d: %u mV, %u mA",
2479 src_pdo_index, out_mv, op_ma);
2481 port->pps_data.op_curr = op_ma;
2482 port->pps_data.out_volt = out_mv;
2487 static int tcpm_pd_send_pps_request(struct tcpm_port *port)
2489 struct pd_message msg;
2493 ret = tcpm_pd_build_pps_request(port, &rdo);
2497 memset(&msg, 0, sizeof(msg));
2498 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
2501 port->negotiated_rev,
2502 port->message_id, 1);
2503 msg.payload[0] = cpu_to_le32(rdo);
2505 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2508 static int tcpm_set_vbus(struct tcpm_port *port, bool enable)
2512 if (enable && port->vbus_charge)
2515 tcpm_log(port, "vbus:=%d charge=%d", enable, port->vbus_charge);
2517 ret = port->tcpc->set_vbus(port->tcpc, enable, port->vbus_charge);
2521 port->vbus_source = enable;
2525 static int tcpm_set_charge(struct tcpm_port *port, bool charge)
2529 if (charge && port->vbus_source)
2532 if (charge != port->vbus_charge) {
2533 tcpm_log(port, "vbus=%d charge:=%d", port->vbus_source, charge);
2534 ret = port->tcpc->set_vbus(port->tcpc, port->vbus_source,
2539 port->vbus_charge = charge;
2543 static bool tcpm_start_drp_toggling(struct tcpm_port *port,
2544 enum typec_cc_status cc)
2548 if (port->tcpc->start_drp_toggling &&
2549 port->port_type == TYPEC_PORT_DRP) {
2550 tcpm_log_force(port, "Start DRP toggling");
2551 ret = port->tcpc->start_drp_toggling(port->tcpc, cc);
2559 static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc)
2561 tcpm_log(port, "cc:=%d", cc);
2563 port->tcpc->set_cc(port->tcpc, cc);
2566 static int tcpm_init_vbus(struct tcpm_port *port)
2570 ret = port->tcpc->set_vbus(port->tcpc, false, false);
2571 port->vbus_source = false;
2572 port->vbus_charge = false;
2576 static int tcpm_init_vconn(struct tcpm_port *port)
2580 ret = port->tcpc->set_vconn(port->tcpc, false);
2581 port->vconn_role = TYPEC_SINK;
2585 static void tcpm_typec_connect(struct tcpm_port *port)
2587 if (!port->connected) {
2588 /* Make sure we don't report stale identity information */
2589 memset(&port->partner_ident, 0, sizeof(port->partner_ident));
2590 port->partner_desc.usb_pd = port->pd_capable;
2591 if (tcpm_port_is_debug(port))
2592 port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG;
2593 else if (tcpm_port_is_audio(port))
2594 port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO;
2596 port->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
2597 port->partner = typec_register_partner(port->typec_port,
2598 &port->partner_desc);
2599 port->connected = true;
2603 static int tcpm_src_attach(struct tcpm_port *port)
2605 enum typec_cc_polarity polarity =
2606 port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2
2607 : TYPEC_POLARITY_CC1;
2613 ret = tcpm_set_polarity(port, polarity);
2617 ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
2621 ret = port->tcpc->set_pd_rx(port->tcpc, true);
2623 goto out_disable_mux;
2626 * USB Type-C specification, version 1.2,
2627 * chapter 4.5.2.2.8.1 (Attached.SRC Requirements)
2628 * Enable VCONN only if the non-RD port is set to RA.
2630 if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) ||
2631 (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) {
2632 ret = tcpm_set_vconn(port, true);
2634 goto out_disable_pd;
2637 ret = tcpm_set_vbus(port, true);
2639 goto out_disable_vconn;
2641 port->pd_capable = false;
2643 port->partner = NULL;
2645 port->attached = true;
2646 port->send_discover = true;
2651 tcpm_set_vconn(port, false);
2653 port->tcpc->set_pd_rx(port->tcpc, false);
2655 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
2656 TYPEC_ORIENTATION_NONE);
2660 static void tcpm_typec_disconnect(struct tcpm_port *port)
2662 if (port->connected) {
2663 typec_unregister_partner(port->partner);
2664 port->partner = NULL;
2665 port->connected = false;
2669 static void tcpm_unregister_altmodes(struct tcpm_port *port)
2671 struct pd_mode_data *modep = &port->mode_data;
2674 for (i = 0; i < modep->altmodes; i++) {
2675 typec_unregister_altmode(port->partner_altmode[i]);
2676 port->partner_altmode[i] = NULL;
2679 memset(modep, 0, sizeof(*modep));
2682 static void tcpm_reset_port(struct tcpm_port *port)
2684 tcpm_unregister_altmodes(port);
2685 tcpm_typec_disconnect(port);
2686 port->attached = false;
2687 port->pd_capable = false;
2688 port->pps_data.supported = false;
2691 * First Rx ID should be 0; set this to a sentinel of -1 so that
2692 * we can check tcpm_pd_rx_handler() if we had seen it before.
2694 port->rx_msgid = -1;
2696 port->tcpc->set_pd_rx(port->tcpc, false);
2697 tcpm_init_vbus(port); /* also disables charging */
2698 tcpm_init_vconn(port);
2699 tcpm_set_current_limit(port, 0, 0);
2700 tcpm_set_polarity(port, TYPEC_POLARITY_CC1);
2701 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
2702 TYPEC_ORIENTATION_NONE);
2703 tcpm_set_attached_state(port, false);
2704 port->try_src_count = 0;
2705 port->try_snk_count = 0;
2706 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
2708 power_supply_changed(port->psy);
2711 static void tcpm_detach(struct tcpm_port *port)
2713 if (!port->attached)
2716 if (tcpm_port_is_disconnected(port))
2717 port->hard_reset_count = 0;
2719 tcpm_reset_port(port);
2722 static void tcpm_src_detach(struct tcpm_port *port)
2727 static int tcpm_snk_attach(struct tcpm_port *port)
2734 ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ?
2735 TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1);
2739 ret = tcpm_set_roles(port, true, TYPEC_SINK, TYPEC_DEVICE);
2743 port->pd_capable = false;
2745 port->partner = NULL;
2747 port->attached = true;
2748 port->send_discover = true;
2753 static void tcpm_snk_detach(struct tcpm_port *port)
2758 static int tcpm_acc_attach(struct tcpm_port *port)
2765 ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
2769 port->partner = NULL;
2771 tcpm_typec_connect(port);
2773 port->attached = true;
2778 static void tcpm_acc_detach(struct tcpm_port *port)
2783 static inline enum tcpm_state hard_reset_state(struct tcpm_port *port)
2785 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)
2786 return HARD_RESET_SEND;
2787 if (port->pd_capable)
2788 return ERROR_RECOVERY;
2789 if (port->pwr_role == TYPEC_SOURCE)
2790 return SRC_UNATTACHED;
2791 if (port->state == SNK_WAIT_CAPABILITIES)
2793 return SNK_UNATTACHED;
2796 static inline enum tcpm_state unattached_state(struct tcpm_port *port)
2798 if (port->port_type == TYPEC_PORT_DRP) {
2799 if (port->pwr_role == TYPEC_SOURCE)
2800 return SRC_UNATTACHED;
2802 return SNK_UNATTACHED;
2803 } else if (port->port_type == TYPEC_PORT_SRC) {
2804 return SRC_UNATTACHED;
2807 return SNK_UNATTACHED;
2810 static void tcpm_check_send_discover(struct tcpm_port *port)
2812 if (port->data_role == TYPEC_HOST && port->send_discover &&
2814 tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0);
2815 port->send_discover = false;
2819 static void tcpm_swap_complete(struct tcpm_port *port, int result)
2821 if (port->swap_pending) {
2822 port->swap_status = result;
2823 port->swap_pending = false;
2824 port->non_pd_role_swap = false;
2825 complete(&port->swap_complete);
2829 static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc)
2832 case TYPEC_CC_RP_1_5:
2833 return TYPEC_PWR_MODE_1_5A;
2834 case TYPEC_CC_RP_3_0:
2835 return TYPEC_PWR_MODE_3_0A;
2836 case TYPEC_CC_RP_DEF:
2838 return TYPEC_PWR_MODE_USB;
2842 static void run_state_machine(struct tcpm_port *port)
2845 enum typec_pwr_opmode opmode;
2848 port->enter_state = port->state;
2849 switch (port->state) {
2853 case SRC_UNATTACHED:
2854 if (!port->non_pd_role_swap)
2855 tcpm_swap_complete(port, -ENOTCONN);
2856 tcpm_src_detach(port);
2857 if (tcpm_start_drp_toggling(port, tcpm_rp_cc(port))) {
2858 tcpm_set_state(port, DRP_TOGGLING, 0);
2861 tcpm_set_cc(port, tcpm_rp_cc(port));
2862 if (port->port_type == TYPEC_PORT_DRP)
2863 tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK);
2865 case SRC_ATTACH_WAIT:
2866 if (tcpm_port_is_debug(port))
2867 tcpm_set_state(port, DEBUG_ACC_ATTACHED,
2869 else if (tcpm_port_is_audio(port))
2870 tcpm_set_state(port, AUDIO_ACC_ATTACHED,
2872 else if (tcpm_port_is_source(port))
2873 tcpm_set_state(port,
2874 tcpm_try_snk(port) ? SNK_TRY
2880 port->try_snk_count++;
2883 * - Do not drive vconn or vbus
2884 * - Terminate CC pins (both) to Rd
2886 * - Wait for tDRPTry (PD_T_DRP_TRY).
2887 * Until then, ignore any state changes.
2889 tcpm_set_cc(port, TYPEC_CC_RD);
2890 tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY);
2893 if (tcpm_port_is_sink(port)) {
2894 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0);
2896 tcpm_set_state(port, SRC_TRYWAIT, 0);
2900 case SNK_TRY_WAIT_DEBOUNCE:
2901 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS,
2904 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
2905 if (port->vbus_present && tcpm_port_is_sink(port)) {
2906 tcpm_set_state(port, SNK_ATTACHED, 0);
2908 tcpm_set_state(port, SRC_TRYWAIT, 0);
2913 tcpm_set_cc(port, tcpm_rp_cc(port));
2914 if (port->max_wait == 0) {
2915 port->max_wait = jiffies +
2916 msecs_to_jiffies(PD_T_DRP_TRY);
2917 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
2920 if (time_is_after_jiffies(port->max_wait))
2921 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
2922 jiffies_to_msecs(port->max_wait -
2925 tcpm_set_state(port, SNK_UNATTACHED, 0);
2928 case SRC_TRYWAIT_DEBOUNCE:
2929 tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE);
2931 case SRC_TRYWAIT_UNATTACHED:
2932 tcpm_set_state(port, SNK_UNATTACHED, 0);
2936 ret = tcpm_src_attach(port);
2937 tcpm_set_state(port, SRC_UNATTACHED,
2938 ret < 0 ? 0 : PD_T_PS_SOURCE_ON);
2941 opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port));
2942 typec_set_pwr_opmode(port->typec_port, opmode);
2943 port->pwr_opmode = TYPEC_PWR_MODE_USB;
2944 port->caps_count = 0;
2945 port->negotiated_rev = PD_MAX_REV;
2946 port->message_id = 0;
2947 port->rx_msgid = -1;
2948 port->explicit_contract = false;
2949 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
2951 case SRC_SEND_CAPABILITIES:
2953 if (port->caps_count > PD_N_CAPS_COUNT) {
2954 tcpm_set_state(port, SRC_READY, 0);
2957 ret = tcpm_pd_send_source_caps(port);
2959 tcpm_set_state(port, SRC_SEND_CAPABILITIES,
2960 PD_T_SEND_SOURCE_CAP);
2963 * Per standard, we should clear the reset counter here.
2964 * However, that can result in state machine hang-ups.
2965 * Reset it only in READY state to improve stability.
2967 /* port->hard_reset_count = 0; */
2968 port->caps_count = 0;
2969 port->pd_capable = true;
2970 tcpm_set_state_cond(port, SRC_SEND_CAPABILITIES_TIMEOUT,
2971 PD_T_SEND_SOURCE_CAP);
2974 case SRC_SEND_CAPABILITIES_TIMEOUT:
2976 * Error recovery for a PD_DATA_SOURCE_CAP reply timeout.
2978 * PD 2.0 sinks are supposed to accept src-capabilities with a
2979 * 3.0 header and simply ignore any src PDOs which the sink does
2980 * not understand such as PPS but some 2.0 sinks instead ignore
2981 * the entire PD_DATA_SOURCE_CAP message, causing contract
2982 * negotiation to fail.
2984 * After PD_N_HARD_RESET_COUNT hard-reset attempts, we try
2985 * sending src-capabilities with a lower PD revision to
2986 * make these broken sinks work.
2988 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) {
2989 tcpm_set_state(port, HARD_RESET_SEND, 0);
2990 } else if (port->negotiated_rev > PD_REV20) {
2991 port->negotiated_rev--;
2992 port->hard_reset_count = 0;
2993 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
2995 tcpm_set_state(port, hard_reset_state(port), 0);
2998 case SRC_NEGOTIATE_CAPABILITIES:
2999 ret = tcpm_pd_check_request(port);
3001 tcpm_pd_send_control(port, PD_CTRL_REJECT);
3002 if (!port->explicit_contract) {
3003 tcpm_set_state(port,
3004 SRC_WAIT_NEW_CAPABILITIES, 0);
3006 tcpm_set_state(port, SRC_READY, 0);
3009 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3010 tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
3011 PD_T_SRC_TRANSITION);
3014 case SRC_TRANSITION_SUPPLY:
3015 /* XXX: regulator_set_voltage(vbus, ...) */
3016 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
3017 port->explicit_contract = true;
3018 typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD);
3019 port->pwr_opmode = TYPEC_PWR_MODE_PD;
3020 tcpm_set_state_cond(port, SRC_READY, 0);
3024 port->hard_reset_count = 0;
3026 port->try_src_count = 0;
3028 tcpm_swap_complete(port, 0);
3029 tcpm_typec_connect(port);
3031 tcpm_check_send_discover(port);
3034 * Sending ping messages is not necessary if
3035 * - the source operates at vSafe5V
3037 * - The system is not operating in PD mode
3039 * - Both partners are connected using a Type-C connector
3041 * There is no actual need to send PD messages since the local
3042 * port type-c and the spec does not clearly say whether PD is
3043 * possible when type-c is connected to Type-A/B
3046 case SRC_WAIT_NEW_CAPABILITIES:
3047 /* Nothing to do... */
3051 case SNK_UNATTACHED:
3052 if (!port->non_pd_role_swap)
3053 tcpm_swap_complete(port, -ENOTCONN);
3054 tcpm_pps_complete(port, -ENOTCONN);
3055 tcpm_snk_detach(port);
3056 if (tcpm_start_drp_toggling(port, TYPEC_CC_RD)) {
3057 tcpm_set_state(port, DRP_TOGGLING, 0);
3060 tcpm_set_cc(port, TYPEC_CC_RD);
3061 if (port->port_type == TYPEC_PORT_DRP)
3062 tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC);
3064 case SNK_ATTACH_WAIT:
3065 if ((port->cc1 == TYPEC_CC_OPEN &&
3066 port->cc2 != TYPEC_CC_OPEN) ||
3067 (port->cc1 != TYPEC_CC_OPEN &&
3068 port->cc2 == TYPEC_CC_OPEN))
3069 tcpm_set_state(port, SNK_DEBOUNCED,
3071 else if (tcpm_port_is_disconnected(port))
3072 tcpm_set_state(port, SNK_UNATTACHED,
3076 if (tcpm_port_is_disconnected(port))
3077 tcpm_set_state(port, SNK_UNATTACHED,
3079 else if (port->vbus_present)
3080 tcpm_set_state(port,
3081 tcpm_try_src(port) ? SRC_TRY
3085 /* Wait for VBUS, but not forever */
3086 tcpm_set_state(port, PORT_RESET, PD_T_PS_SOURCE_ON);
3090 port->try_src_count++;
3091 tcpm_set_cc(port, tcpm_rp_cc(port));
3093 tcpm_set_state(port, SRC_TRY_WAIT, 0);
3096 if (port->max_wait == 0) {
3097 port->max_wait = jiffies +
3098 msecs_to_jiffies(PD_T_DRP_TRY);
3099 msecs = PD_T_DRP_TRY;
3101 if (time_is_after_jiffies(port->max_wait))
3102 msecs = jiffies_to_msecs(port->max_wait -
3107 tcpm_set_state(port, SNK_TRYWAIT, msecs);
3109 case SRC_TRY_DEBOUNCE:
3110 tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE);
3113 tcpm_set_cc(port, TYPEC_CC_RD);
3114 tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE);
3116 case SNK_TRYWAIT_VBUS:
3118 * TCPM stays in this state indefinitely until VBUS
3119 * is detected as long as Rp is not detected for
3120 * more than a time period of tPDDebounce.
3122 if (port->vbus_present && tcpm_port_is_sink(port)) {
3123 tcpm_set_state(port, SNK_ATTACHED, 0);
3126 if (!tcpm_port_is_sink(port))
3127 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
3129 case SNK_TRYWAIT_DEBOUNCE:
3130 tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE);
3133 ret = tcpm_snk_attach(port);
3135 tcpm_set_state(port, SNK_UNATTACHED, 0);
3137 tcpm_set_state(port, SNK_STARTUP, 0);
3140 opmode = tcpm_get_pwr_opmode(port->polarity ?
3141 port->cc2 : port->cc1);
3142 typec_set_pwr_opmode(port->typec_port, opmode);
3143 port->pwr_opmode = TYPEC_PWR_MODE_USB;
3144 port->negotiated_rev = PD_MAX_REV;
3145 port->message_id = 0;
3146 port->rx_msgid = -1;
3147 port->explicit_contract = false;
3148 tcpm_set_state(port, SNK_DISCOVERY, 0);
3151 if (port->vbus_present) {
3152 tcpm_set_current_limit(port,
3153 tcpm_get_current_limit(port),
3155 tcpm_set_charge(port, true);
3156 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3160 * For DRP, timeouts differ. Also, handling is supposed to be
3161 * different and much more complex (dead battery detection;
3162 * see USB power delivery specification, section 8.3.3.6.1.5.1).
3164 tcpm_set_state(port, hard_reset_state(port),
3165 port->port_type == TYPEC_PORT_DRP ?
3166 PD_T_DB_DETECT : PD_T_NO_RESPONSE);
3168 case SNK_DISCOVERY_DEBOUNCE:
3169 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE,
3172 case SNK_DISCOVERY_DEBOUNCE_DONE:
3173 if (!tcpm_port_is_disconnected(port) &&
3174 tcpm_port_is_sink(port) &&
3175 time_is_after_jiffies(port->delayed_runtime)) {
3176 tcpm_set_state(port, SNK_DISCOVERY,
3177 jiffies_to_msecs(port->delayed_runtime -
3181 tcpm_set_state(port, unattached_state(port), 0);
3183 case SNK_WAIT_CAPABILITIES:
3184 ret = port->tcpc->set_pd_rx(port->tcpc, true);
3186 tcpm_set_state(port, SNK_READY, 0);
3190 * If VBUS has never been low, and we time out waiting
3191 * for source cap, try a soft reset first, in case we
3192 * were already in a stable contract before this boot.
3193 * Do this only once.
3195 if (port->vbus_never_low) {
3196 port->vbus_never_low = false;
3197 tcpm_set_state(port, SOFT_RESET_SEND,
3198 PD_T_SINK_WAIT_CAP);
3200 tcpm_set_state(port, hard_reset_state(port),
3201 PD_T_SINK_WAIT_CAP);
3204 case SNK_NEGOTIATE_CAPABILITIES:
3205 port->pd_capable = true;
3206 port->hard_reset_count = 0;
3207 ret = tcpm_pd_send_request(port);
3209 /* Let the Source send capabilities again. */
3210 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3212 tcpm_set_state_cond(port, hard_reset_state(port),
3213 PD_T_SENDER_RESPONSE);
3216 case SNK_NEGOTIATE_PPS_CAPABILITIES:
3217 ret = tcpm_pd_send_pps_request(port);
3219 port->pps_status = ret;
3221 * If this was called due to updates to sink
3222 * capabilities, and pps is no longer valid, we should
3223 * safely fall back to a standard PDO.
3225 if (port->update_sink_caps)
3226 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
3228 tcpm_set_state(port, SNK_READY, 0);
3230 tcpm_set_state_cond(port, hard_reset_state(port),
3231 PD_T_SENDER_RESPONSE);
3234 case SNK_TRANSITION_SINK:
3235 case SNK_TRANSITION_SINK_VBUS:
3236 tcpm_set_state(port, hard_reset_state(port),
3237 PD_T_PS_TRANSITION);
3240 port->try_snk_count = 0;
3241 port->update_sink_caps = false;
3242 if (port->explicit_contract) {
3243 typec_set_pwr_opmode(port->typec_port,
3245 port->pwr_opmode = TYPEC_PWR_MODE_PD;
3248 tcpm_swap_complete(port, 0);
3249 tcpm_typec_connect(port);
3250 tcpm_check_send_discover(port);
3251 tcpm_pps_complete(port, port->pps_status);
3253 power_supply_changed(port->psy);
3257 /* Accessory states */
3258 case ACC_UNATTACHED:
3259 tcpm_acc_detach(port);
3260 tcpm_set_state(port, SRC_UNATTACHED, 0);
3262 case DEBUG_ACC_ATTACHED:
3263 case AUDIO_ACC_ATTACHED:
3264 ret = tcpm_acc_attach(port);
3266 tcpm_set_state(port, ACC_UNATTACHED, 0);
3268 case AUDIO_ACC_DEBOUNCE:
3269 tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE);
3272 /* Hard_Reset states */
3273 case HARD_RESET_SEND:
3274 tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL);
3275 tcpm_set_state(port, HARD_RESET_START, 0);
3277 case HARD_RESET_START:
3278 port->hard_reset_count++;
3279 port->tcpc->set_pd_rx(port->tcpc, false);
3280 tcpm_unregister_altmodes(port);
3281 port->send_discover = true;
3282 if (port->pwr_role == TYPEC_SOURCE)
3283 tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF,
3284 PD_T_PS_HARD_RESET);
3286 tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0);
3288 case SRC_HARD_RESET_VBUS_OFF:
3289 tcpm_set_vconn(port, true);
3290 tcpm_set_vbus(port, false);
3291 tcpm_set_roles(port, port->self_powered, TYPEC_SOURCE,
3293 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
3295 case SRC_HARD_RESET_VBUS_ON:
3296 tcpm_set_vbus(port, true);
3297 port->tcpc->set_pd_rx(port->tcpc, true);
3298 tcpm_set_attached_state(port, true);
3299 tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON);
3301 case SNK_HARD_RESET_SINK_OFF:
3302 memset(&port->pps_data, 0, sizeof(port->pps_data));
3303 tcpm_set_vconn(port, false);
3304 if (port->pd_capable)
3305 tcpm_set_charge(port, false);
3306 tcpm_set_roles(port, port->self_powered, TYPEC_SINK,
3309 * VBUS may or may not toggle, depending on the adapter.
3310 * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON
3311 * directly after timeout.
3313 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V);
3315 case SNK_HARD_RESET_WAIT_VBUS:
3316 /* Assume we're disconnected if VBUS doesn't come back. */
3317 tcpm_set_state(port, SNK_UNATTACHED,
3318 PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON);
3320 case SNK_HARD_RESET_SINK_ON:
3321 /* Note: There is no guarantee that VBUS is on in this state */
3324 * The specification suggests that dual mode ports in sink
3325 * mode should transition to state PE_SRC_Transition_to_default.
3326 * See USB power delivery specification chapter 8.3.3.6.1.3.
3327 * This would mean to to
3328 * - turn off VCONN, reset power supply
3329 * - request hardware reset
3331 * - Transition to state PE_Src_Startup
3332 * SNK only ports shall transition to state Snk_Startup
3333 * (see chapter 8.3.3.3.8).
3334 * Similar, dual-mode ports in source mode should transition
3335 * to PE_SNK_Transition_to_default.
3337 if (port->pd_capable) {
3338 tcpm_set_current_limit(port,
3339 tcpm_get_current_limit(port),
3341 tcpm_set_charge(port, true);
3343 tcpm_set_attached_state(port, true);
3344 tcpm_set_state(port, SNK_STARTUP, 0);
3347 /* Soft_Reset states */
3349 port->message_id = 0;
3350 port->rx_msgid = -1;
3351 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3352 if (port->pwr_role == TYPEC_SOURCE)
3353 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
3355 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3357 case SOFT_RESET_SEND:
3358 port->message_id = 0;
3359 port->rx_msgid = -1;
3360 if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET))
3361 tcpm_set_state_cond(port, hard_reset_state(port), 0);
3363 tcpm_set_state_cond(port, hard_reset_state(port),
3364 PD_T_SENDER_RESPONSE);
3367 /* DR_Swap states */
3369 tcpm_pd_send_control(port, PD_CTRL_DR_SWAP);
3370 tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT,
3371 PD_T_SENDER_RESPONSE);
3373 case DR_SWAP_ACCEPT:
3374 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3375 tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0);
3377 case DR_SWAP_SEND_TIMEOUT:
3378 tcpm_swap_complete(port, -ETIMEDOUT);
3379 tcpm_set_state(port, ready_state(port), 0);
3381 case DR_SWAP_CHANGE_DR:
3382 if (port->data_role == TYPEC_HOST) {
3383 tcpm_unregister_altmodes(port);
3384 tcpm_set_roles(port, true, port->pwr_role,
3387 tcpm_set_roles(port, true, port->pwr_role,
3389 port->send_discover = true;
3391 tcpm_set_state(port, ready_state(port), 0);
3394 /* PR_Swap states */
3395 case PR_SWAP_ACCEPT:
3396 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3397 tcpm_set_state(port, PR_SWAP_START, 0);
3400 tcpm_pd_send_control(port, PD_CTRL_PR_SWAP);
3401 tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT,
3402 PD_T_SENDER_RESPONSE);
3404 case PR_SWAP_SEND_TIMEOUT:
3405 tcpm_swap_complete(port, -ETIMEDOUT);
3406 tcpm_set_state(port, ready_state(port), 0);
3409 if (port->pwr_role == TYPEC_SOURCE)
3410 tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF,
3411 PD_T_SRC_TRANSITION);
3413 tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0);
3415 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3416 tcpm_set_vbus(port, false);
3417 port->explicit_contract = false;
3418 /* allow time for Vbus discharge, must be < tSrcSwapStdby */
3419 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF,
3422 case PR_SWAP_SRC_SNK_SOURCE_OFF:
3423 tcpm_set_cc(port, TYPEC_CC_RD);
3424 /* allow CC debounce */
3425 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED,
3428 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
3430 * USB-PD standard, 6.2.1.4, Port Power Role:
3431 * "During the Power Role Swap Sequence, for the initial Source
3432 * Port, the Port Power Role field shall be set to Sink in the
3433 * PS_RDY Message indicating that the initial Source’s power
3434 * supply is turned off"
3436 tcpm_set_pwr_role(port, TYPEC_SINK);
3437 if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
3438 tcpm_set_state(port, ERROR_RECOVERY, 0);
3441 tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON);
3443 case PR_SWAP_SRC_SNK_SINK_ON:
3444 tcpm_set_state(port, SNK_STARTUP, 0);
3446 case PR_SWAP_SNK_SRC_SINK_OFF:
3447 tcpm_set_charge(port, false);
3448 tcpm_set_state(port, hard_reset_state(port),
3449 PD_T_PS_SOURCE_OFF);
3451 case PR_SWAP_SNK_SRC_SOURCE_ON:
3452 tcpm_set_cc(port, tcpm_rp_cc(port));
3453 tcpm_set_vbus(port, true);
3455 * allow time VBUS ramp-up, must be < tNewSrc
3456 * Also, this window overlaps with CC debounce as well.
3457 * So, Wait for the max of two which is PD_T_NEWSRC
3459 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP,
3462 case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP:
3464 * USB PD standard, 6.2.1.4:
3465 * "Subsequent Messages initiated by the Policy Engine,
3466 * such as the PS_RDY Message sent to indicate that Vbus
3467 * is ready, will have the Port Power Role field set to
3470 tcpm_set_pwr_role(port, TYPEC_SOURCE);
3471 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
3472 tcpm_set_state(port, SRC_STARTUP, 0);
3475 case VCONN_SWAP_ACCEPT:
3476 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3477 tcpm_set_state(port, VCONN_SWAP_START, 0);
3479 case VCONN_SWAP_SEND:
3480 tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP);
3481 tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT,
3482 PD_T_SENDER_RESPONSE);
3484 case VCONN_SWAP_SEND_TIMEOUT:
3485 tcpm_swap_complete(port, -ETIMEDOUT);
3486 tcpm_set_state(port, ready_state(port), 0);
3488 case VCONN_SWAP_START:
3489 if (port->vconn_role == TYPEC_SOURCE)
3490 tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0);
3492 tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0);
3494 case VCONN_SWAP_WAIT_FOR_VCONN:
3495 tcpm_set_state(port, hard_reset_state(port),
3496 PD_T_VCONN_SOURCE_ON);
3498 case VCONN_SWAP_TURN_ON_VCONN:
3499 tcpm_set_vconn(port, true);
3500 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
3501 tcpm_set_state(port, ready_state(port), 0);
3503 case VCONN_SWAP_TURN_OFF_VCONN:
3504 tcpm_set_vconn(port, false);
3505 tcpm_set_state(port, ready_state(port), 0);
3508 case DR_SWAP_CANCEL:
3509 case PR_SWAP_CANCEL:
3510 case VCONN_SWAP_CANCEL:
3511 tcpm_swap_complete(port, port->swap_status);
3512 if (port->pwr_role == TYPEC_SOURCE)
3513 tcpm_set_state(port, SRC_READY, 0);
3515 tcpm_set_state(port, SNK_READY, 0);
3519 switch (BDO_MODE_MASK(port->bist_request)) {
3520 case BDO_MODE_CARRIER2:
3521 tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
3526 /* Always switch to unattached state */
3527 tcpm_set_state(port, unattached_state(port), 0);
3529 case GET_STATUS_SEND:
3530 tcpm_pd_send_control(port, PD_CTRL_GET_STATUS);
3531 tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT,
3532 PD_T_SENDER_RESPONSE);
3534 case GET_STATUS_SEND_TIMEOUT:
3535 tcpm_set_state(port, ready_state(port), 0);
3537 case GET_PPS_STATUS_SEND:
3538 tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS);
3539 tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT,
3540 PD_T_SENDER_RESPONSE);
3542 case GET_PPS_STATUS_SEND_TIMEOUT:
3543 tcpm_set_state(port, ready_state(port), 0);
3545 case ERROR_RECOVERY:
3546 tcpm_swap_complete(port, -EPROTO);
3547 tcpm_pps_complete(port, -EPROTO);
3548 tcpm_set_state(port, PORT_RESET, 0);
3551 tcpm_reset_port(port);
3552 tcpm_set_cc(port, TYPEC_CC_OPEN);
3553 tcpm_set_state(port, PORT_RESET_WAIT_OFF,
3554 PD_T_ERROR_RECOVERY);
3556 case PORT_RESET_WAIT_OFF:
3557 tcpm_set_state(port,
3558 tcpm_default_state(port),
3559 port->vbus_present ? PD_T_PS_SOURCE_OFF : 0);
3562 WARN(1, "Unexpected port state %d\n", port->state);
3567 static void tcpm_state_machine_work(struct work_struct *work)
3569 struct tcpm_port *port = container_of(work, struct tcpm_port,
3570 state_machine.work);
3571 enum tcpm_state prev_state;
3573 mutex_lock(&port->lock);
3574 port->state_machine_running = true;
3576 if (port->queued_message && tcpm_send_queued_message(port))
3579 /* If we were queued due to a delayed state change, update it now */
3580 if (port->delayed_state) {
3581 tcpm_log(port, "state change %s -> %s [delayed %ld ms]",
3582 tcpm_states[port->state],
3583 tcpm_states[port->delayed_state], port->delay_ms);
3584 port->prev_state = port->state;
3585 port->state = port->delayed_state;
3586 port->delayed_state = INVALID_STATE;
3590 * Continue running as long as we have (non-delayed) state changes
3594 prev_state = port->state;
3595 run_state_machine(port);
3596 if (port->queued_message)
3597 tcpm_send_queued_message(port);
3598 } while (port->state != prev_state && !port->delayed_state);
3601 port->state_machine_running = false;
3602 mutex_unlock(&port->lock);
3605 static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
3606 enum typec_cc_status cc2)
3608 enum typec_cc_status old_cc1, old_cc2;
3609 enum tcpm_state new_state;
3611 old_cc1 = port->cc1;
3612 old_cc2 = port->cc2;
3616 tcpm_log_force(port,
3617 "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]",
3618 old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state],
3620 tcpm_port_is_disconnected(port) ? "disconnected"
3623 switch (port->state) {
3625 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
3626 tcpm_port_is_source(port))
3627 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3628 else if (tcpm_port_is_sink(port))
3629 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3631 case SRC_UNATTACHED:
3632 case ACC_UNATTACHED:
3633 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
3634 tcpm_port_is_source(port))
3635 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3637 case SRC_ATTACH_WAIT:
3638 if (tcpm_port_is_disconnected(port) ||
3639 tcpm_port_is_audio_detached(port))
3640 tcpm_set_state(port, SRC_UNATTACHED, 0);
3641 else if (cc1 != old_cc1 || cc2 != old_cc2)
3642 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3645 case SRC_SEND_CAPABILITIES:
3647 if (tcpm_port_is_disconnected(port) ||
3648 !tcpm_port_is_source(port))
3649 tcpm_set_state(port, SRC_UNATTACHED, 0);
3651 case SNK_UNATTACHED:
3652 if (tcpm_port_is_sink(port))
3653 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3655 case SNK_ATTACH_WAIT:
3656 if ((port->cc1 == TYPEC_CC_OPEN &&
3657 port->cc2 != TYPEC_CC_OPEN) ||
3658 (port->cc1 != TYPEC_CC_OPEN &&
3659 port->cc2 == TYPEC_CC_OPEN))
3660 new_state = SNK_DEBOUNCED;
3661 else if (tcpm_port_is_disconnected(port))
3662 new_state = SNK_UNATTACHED;
3665 if (new_state != port->delayed_state)
3666 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3669 if (tcpm_port_is_disconnected(port))
3670 new_state = SNK_UNATTACHED;
3671 else if (port->vbus_present)
3672 new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED;
3674 new_state = SNK_UNATTACHED;
3675 if (new_state != port->delayed_state)
3676 tcpm_set_state(port, SNK_DEBOUNCED, 0);
3679 if (tcpm_port_is_disconnected(port))
3680 tcpm_set_state(port, unattached_state(port), 0);
3681 else if (!port->pd_capable &&
3682 (cc1 != old_cc1 || cc2 != old_cc2))
3683 tcpm_set_current_limit(port,
3684 tcpm_get_current_limit(port),
3688 case AUDIO_ACC_ATTACHED:
3689 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
3690 tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0);
3692 case AUDIO_ACC_DEBOUNCE:
3693 if (tcpm_port_is_audio(port))
3694 tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0);
3697 case DEBUG_ACC_ATTACHED:
3698 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
3699 tcpm_set_state(port, ACC_UNATTACHED, 0);
3703 /* Do nothing, waiting for timeout */
3707 /* CC line is unstable, wait for debounce */
3708 if (tcpm_port_is_disconnected(port))
3709 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0);
3711 case SNK_DISCOVERY_DEBOUNCE:
3715 /* Hand over to state machine if needed */
3716 if (!port->vbus_present && tcpm_port_is_source(port))
3717 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
3719 case SRC_TRYWAIT_DEBOUNCE:
3720 if (port->vbus_present || !tcpm_port_is_source(port))
3721 tcpm_set_state(port, SRC_TRYWAIT, 0);
3723 case SNK_TRY_WAIT_DEBOUNCE:
3724 if (!tcpm_port_is_sink(port)) {
3726 tcpm_set_state(port, SRC_TRYWAIT, 0);
3730 if (tcpm_port_is_source(port))
3731 tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0);
3733 case SRC_TRY_DEBOUNCE:
3734 tcpm_set_state(port, SRC_TRY_WAIT, 0);
3736 case SNK_TRYWAIT_DEBOUNCE:
3737 if (tcpm_port_is_sink(port))
3738 tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0);
3740 case SNK_TRYWAIT_VBUS:
3741 if (!tcpm_port_is_sink(port))
3742 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
3745 /* Do nothing, waiting for tCCDebounce */
3747 case PR_SWAP_SNK_SRC_SINK_OFF:
3748 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3749 case PR_SWAP_SRC_SNK_SOURCE_OFF:
3750 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
3751 case PR_SWAP_SNK_SRC_SOURCE_ON:
3753 * CC state change is expected in PR_SWAP
3759 if (tcpm_port_is_disconnected(port))
3760 tcpm_set_state(port, unattached_state(port), 0);
3765 static void _tcpm_pd_vbus_on(struct tcpm_port *port)
3767 tcpm_log_force(port, "VBUS on");
3768 port->vbus_present = true;
3769 switch (port->state) {
3770 case SNK_TRANSITION_SINK_VBUS:
3771 port->explicit_contract = true;
3772 tcpm_set_state(port, SNK_READY, 0);
3775 tcpm_set_state(port, SNK_DISCOVERY, 0);
3779 tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY
3783 case SNK_HARD_RESET_WAIT_VBUS:
3784 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0);
3787 tcpm_set_state(port, SRC_STARTUP, 0);
3789 case SRC_HARD_RESET_VBUS_ON:
3790 tcpm_set_state(port, SRC_STARTUP, 0);
3794 /* Do nothing, waiting for timeout */
3797 /* Do nothing, Waiting for Rd to be detected */
3799 case SRC_TRYWAIT_DEBOUNCE:
3800 tcpm_set_state(port, SRC_TRYWAIT, 0);
3802 case SNK_TRY_WAIT_DEBOUNCE:
3803 /* Do nothing, waiting for PD_DEBOUNCE to do be done */
3806 /* Do nothing, waiting for tCCDebounce */
3808 case SNK_TRYWAIT_VBUS:
3809 if (tcpm_port_is_sink(port))
3810 tcpm_set_state(port, SNK_ATTACHED, 0);
3812 case SNK_TRYWAIT_DEBOUNCE:
3813 /* Do nothing, waiting for Rp */
3816 case SRC_TRY_DEBOUNCE:
3817 /* Do nothing, waiting for sink detection */
3824 static void _tcpm_pd_vbus_off(struct tcpm_port *port)
3826 tcpm_log_force(port, "VBUS off");
3827 port->vbus_present = false;
3828 port->vbus_never_low = false;
3829 switch (port->state) {
3830 case SNK_HARD_RESET_SINK_OFF:
3831 tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0);
3833 case SRC_HARD_RESET_VBUS_OFF:
3834 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, 0);
3836 case HARD_RESET_SEND:
3840 /* Do nothing, waiting for timeout */
3843 /* Hand over to state machine if needed */
3844 if (tcpm_port_is_source(port))
3845 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
3847 case SNK_TRY_WAIT_DEBOUNCE:
3848 /* Do nothing, waiting for PD_DEBOUNCE to do be done */
3851 case SNK_TRYWAIT_VBUS:
3852 case SNK_TRYWAIT_DEBOUNCE:
3854 case SNK_ATTACH_WAIT:
3855 tcpm_set_state(port, SNK_UNATTACHED, 0);
3858 case SNK_NEGOTIATE_CAPABILITIES:
3861 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3862 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0);
3865 case PR_SWAP_SNK_SRC_SINK_OFF:
3866 /* Do nothing, expected */
3869 case PORT_RESET_WAIT_OFF:
3870 tcpm_set_state(port, tcpm_default_state(port), 0);
3873 case SRC_TRY_DEBOUNCE:
3874 /* Do nothing, waiting for sink detection */
3877 if (port->pwr_role == TYPEC_SINK &&
3879 tcpm_set_state(port, SNK_UNATTACHED, 0);
3884 static void _tcpm_pd_hard_reset(struct tcpm_port *port)
3886 tcpm_log_force(port, "Received hard reset");
3888 * If we keep receiving hard reset requests, executing the hard reset
3889 * must have failed. Revert to error recovery if that happens.
3891 tcpm_set_state(port,
3892 port->hard_reset_count < PD_N_HARD_RESET_COUNT ?
3893 HARD_RESET_START : ERROR_RECOVERY,
3897 static void tcpm_pd_event_handler(struct work_struct *work)
3899 struct tcpm_port *port = container_of(work, struct tcpm_port,
3903 mutex_lock(&port->lock);
3905 spin_lock(&port->pd_event_lock);
3906 while (port->pd_events) {
3907 events = port->pd_events;
3908 port->pd_events = 0;
3909 spin_unlock(&port->pd_event_lock);
3910 if (events & TCPM_RESET_EVENT)
3911 _tcpm_pd_hard_reset(port);
3912 if (events & TCPM_VBUS_EVENT) {
3915 vbus = port->tcpc->get_vbus(port->tcpc);
3917 _tcpm_pd_vbus_on(port);
3919 _tcpm_pd_vbus_off(port);
3921 if (events & TCPM_CC_EVENT) {
3922 enum typec_cc_status cc1, cc2;
3924 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
3925 _tcpm_cc_change(port, cc1, cc2);
3927 spin_lock(&port->pd_event_lock);
3929 spin_unlock(&port->pd_event_lock);
3930 mutex_unlock(&port->lock);
3933 void tcpm_cc_change(struct tcpm_port *port)
3935 spin_lock(&port->pd_event_lock);
3936 port->pd_events |= TCPM_CC_EVENT;
3937 spin_unlock(&port->pd_event_lock);
3938 queue_work(port->wq, &port->event_work);
3940 EXPORT_SYMBOL_GPL(tcpm_cc_change);
3942 void tcpm_vbus_change(struct tcpm_port *port)
3944 spin_lock(&port->pd_event_lock);
3945 port->pd_events |= TCPM_VBUS_EVENT;
3946 spin_unlock(&port->pd_event_lock);
3947 queue_work(port->wq, &port->event_work);
3949 EXPORT_SYMBOL_GPL(tcpm_vbus_change);
3951 void tcpm_pd_hard_reset(struct tcpm_port *port)
3953 spin_lock(&port->pd_event_lock);
3954 port->pd_events = TCPM_RESET_EVENT;
3955 spin_unlock(&port->pd_event_lock);
3956 queue_work(port->wq, &port->event_work);
3958 EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
3960 static int tcpm_dr_set(const struct typec_capability *cap,
3961 enum typec_data_role data)
3963 struct tcpm_port *port = typec_cap_to_tcpm(cap);
3966 mutex_lock(&port->swap_lock);
3967 mutex_lock(&port->lock);
3969 if (port->port_type != TYPEC_PORT_DRP) {
3973 if (port->state != SRC_READY && port->state != SNK_READY) {
3978 if (port->data_role == data) {
3985 * 6.3.9: If an alternate mode is active, a request to swap
3986 * alternate modes shall trigger a port reset.
3987 * Reject data role swap request in this case.
3990 if (!port->pd_capable) {
3992 * If the partner is not PD capable, reset the port to
3993 * trigger a role change. This can only work if a preferred
3994 * role is configured, and if it matches the requested role.
3996 if (port->try_role == TYPEC_NO_PREFERRED_ROLE ||
3997 port->try_role == port->pwr_role) {
4001 port->non_pd_role_swap = true;
4002 tcpm_set_state(port, PORT_RESET, 0);
4004 tcpm_set_state(port, DR_SWAP_SEND, 0);
4007 port->swap_status = 0;
4008 port->swap_pending = true;
4009 reinit_completion(&port->swap_complete);
4010 mutex_unlock(&port->lock);
4012 if (!wait_for_completion_timeout(&port->swap_complete,
4013 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4016 ret = port->swap_status;
4018 port->non_pd_role_swap = false;
4022 mutex_unlock(&port->lock);
4024 mutex_unlock(&port->swap_lock);
4028 static int tcpm_pr_set(const struct typec_capability *cap,
4029 enum typec_role role)
4031 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4034 mutex_lock(&port->swap_lock);
4035 mutex_lock(&port->lock);
4037 if (port->port_type != TYPEC_PORT_DRP) {
4041 if (port->state != SRC_READY && port->state != SNK_READY) {
4046 if (role == port->pwr_role) {
4051 port->swap_status = 0;
4052 port->swap_pending = true;
4053 reinit_completion(&port->swap_complete);
4054 tcpm_set_state(port, PR_SWAP_SEND, 0);
4055 mutex_unlock(&port->lock);
4057 if (!wait_for_completion_timeout(&port->swap_complete,
4058 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4061 ret = port->swap_status;
4066 mutex_unlock(&port->lock);
4068 mutex_unlock(&port->swap_lock);
4072 static int tcpm_vconn_set(const struct typec_capability *cap,
4073 enum typec_role role)
4075 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4078 mutex_lock(&port->swap_lock);
4079 mutex_lock(&port->lock);
4081 if (port->state != SRC_READY && port->state != SNK_READY) {
4086 if (role == port->vconn_role) {
4091 port->swap_status = 0;
4092 port->swap_pending = true;
4093 reinit_completion(&port->swap_complete);
4094 tcpm_set_state(port, VCONN_SWAP_SEND, 0);
4095 mutex_unlock(&port->lock);
4097 if (!wait_for_completion_timeout(&port->swap_complete,
4098 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4101 ret = port->swap_status;
4106 mutex_unlock(&port->lock);
4108 mutex_unlock(&port->swap_lock);
4112 static int tcpm_try_role(const struct typec_capability *cap, int role)
4114 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4115 struct tcpc_dev *tcpc = port->tcpc;
4118 mutex_lock(&port->lock);
4120 ret = tcpc->try_role(tcpc, role);
4121 if (!ret && !tcpc->config->try_role_hw)
4122 port->try_role = role;
4123 port->try_src_count = 0;
4124 port->try_snk_count = 0;
4125 mutex_unlock(&port->lock);
4130 static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr)
4132 unsigned int target_mw;
4135 mutex_lock(&port->swap_lock);
4136 mutex_lock(&port->lock);
4138 if (!port->pps_data.active) {
4143 if (port->state != SNK_READY) {
4148 if (op_curr > port->pps_data.max_curr) {
4153 target_mw = (op_curr * port->pps_data.out_volt) / 1000;
4154 if (target_mw < port->operating_snk_mw) {
4159 /* Round down operating current to align with PPS valid steps */
4160 op_curr = op_curr - (op_curr % RDO_PROG_CURR_MA_STEP);
4162 reinit_completion(&port->pps_complete);
4163 port->pps_data.op_curr = op_curr;
4164 port->pps_status = 0;
4165 port->pps_pending = true;
4166 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4167 mutex_unlock(&port->lock);
4169 if (!wait_for_completion_timeout(&port->pps_complete,
4170 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4173 ret = port->pps_status;
4178 mutex_unlock(&port->lock);
4180 mutex_unlock(&port->swap_lock);
4185 static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt)
4187 unsigned int target_mw;
4190 mutex_lock(&port->swap_lock);
4191 mutex_lock(&port->lock);
4193 if (!port->pps_data.active) {
4198 if (port->state != SNK_READY) {
4203 if (out_volt < port->pps_data.min_volt ||
4204 out_volt > port->pps_data.max_volt) {
4209 target_mw = (port->pps_data.op_curr * out_volt) / 1000;
4210 if (target_mw < port->operating_snk_mw) {
4215 /* Round down output voltage to align with PPS valid steps */
4216 out_volt = out_volt - (out_volt % RDO_PROG_VOLT_MV_STEP);
4218 reinit_completion(&port->pps_complete);
4219 port->pps_data.out_volt = out_volt;
4220 port->pps_status = 0;
4221 port->pps_pending = true;
4222 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4223 mutex_unlock(&port->lock);
4225 if (!wait_for_completion_timeout(&port->pps_complete,
4226 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4229 ret = port->pps_status;
4234 mutex_unlock(&port->lock);
4236 mutex_unlock(&port->swap_lock);
4241 static int tcpm_pps_activate(struct tcpm_port *port, bool activate)
4245 mutex_lock(&port->swap_lock);
4246 mutex_lock(&port->lock);
4248 if (!port->pps_data.supported) {
4253 /* Trying to deactivate PPS when already deactivated so just bail */
4254 if (!port->pps_data.active && !activate)
4257 if (port->state != SNK_READY) {
4262 reinit_completion(&port->pps_complete);
4263 port->pps_status = 0;
4264 port->pps_pending = true;
4266 /* Trigger PPS request or move back to standard PDO contract */
4268 port->pps_data.out_volt = port->supply_voltage;
4269 port->pps_data.op_curr = port->current_limit;
4270 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4272 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
4274 mutex_unlock(&port->lock);
4276 if (!wait_for_completion_timeout(&port->pps_complete,
4277 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4280 ret = port->pps_status;
4285 mutex_unlock(&port->lock);
4287 mutex_unlock(&port->swap_lock);
4292 static void tcpm_init(struct tcpm_port *port)
4294 enum typec_cc_status cc1, cc2;
4296 port->tcpc->init(port->tcpc);
4298 tcpm_reset_port(port);
4302 * Should possibly wait for VBUS to settle if it was enabled locally
4303 * since tcpm_reset_port() will disable VBUS.
4305 port->vbus_present = port->tcpc->get_vbus(port->tcpc);
4306 if (port->vbus_present)
4307 port->vbus_never_low = true;
4309 tcpm_set_state(port, tcpm_default_state(port), 0);
4311 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
4312 _tcpm_cc_change(port, cc1, cc2);
4315 * Some adapters need a clean slate at startup, and won't recover
4316 * otherwise. So do not try to be fancy and force a clean disconnect.
4318 tcpm_set_state(port, PORT_RESET, 0);
4321 static int tcpm_port_type_set(const struct typec_capability *cap,
4322 enum typec_port_type type)
4324 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4326 mutex_lock(&port->lock);
4327 if (type == port->port_type)
4330 port->port_type = type;
4332 if (!port->connected) {
4333 tcpm_set_state(port, PORT_RESET, 0);
4334 } else if (type == TYPEC_PORT_SNK) {
4335 if (!(port->pwr_role == TYPEC_SINK &&
4336 port->data_role == TYPEC_DEVICE))
4337 tcpm_set_state(port, PORT_RESET, 0);
4338 } else if (type == TYPEC_PORT_SRC) {
4339 if (!(port->pwr_role == TYPEC_SOURCE &&
4340 port->data_role == TYPEC_HOST))
4341 tcpm_set_state(port, PORT_RESET, 0);
4345 mutex_unlock(&port->lock);
4349 void tcpm_tcpc_reset(struct tcpm_port *port)
4351 mutex_lock(&port->lock);
4352 /* XXX: Maintain PD connection if possible? */
4354 mutex_unlock(&port->lock);
4356 EXPORT_SYMBOL_GPL(tcpm_tcpc_reset);
4358 static int tcpm_copy_pdos(u32 *dest_pdo, const u32 *src_pdo,
4359 unsigned int nr_pdo)
4363 if (nr_pdo > PDO_MAX_OBJECTS)
4364 nr_pdo = PDO_MAX_OBJECTS;
4366 for (i = 0; i < nr_pdo; i++)
4367 dest_pdo[i] = src_pdo[i];
4372 static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo,
4373 unsigned int nr_vdo)
4377 if (nr_vdo > VDO_MAX_OBJECTS)
4378 nr_vdo = VDO_MAX_OBJECTS;
4380 for (i = 0; i < nr_vdo; i++)
4381 dest_vdo[i] = src_vdo[i];
4386 static int tcpm_fw_get_caps(struct tcpm_port *port,
4387 struct fwnode_handle *fwnode)
4389 const char *cap_str;
4396 /* USB data support is optional */
4397 ret = fwnode_property_read_string(fwnode, "data-role", &cap_str);
4399 port->typec_caps.data = typec_find_port_data_role(cap_str);
4400 if (port->typec_caps.data < 0)
4404 ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
4408 port->typec_caps.type = typec_find_port_power_role(cap_str);
4409 if (port->typec_caps.type < 0)
4411 port->port_type = port->typec_caps.type;
4413 if (port->port_type == TYPEC_PORT_SNK)
4416 /* Get source pdos */
4417 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
4422 port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
4423 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
4424 port->src_pdo, port->nr_src_pdo);
4425 if ((ret < 0) || tcpm_validate_caps(port, port->src_pdo,
4429 if (port->port_type == TYPEC_PORT_SRC)
4432 /* Get the preferred power role for DRP */
4433 ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str);
4437 port->typec_caps.prefer_role = typec_find_power_role(cap_str);
4438 if (port->typec_caps.prefer_role < 0)
4442 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
4447 port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS);
4448 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
4449 port->snk_pdo, port->nr_snk_pdo);
4450 if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo,
4454 if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0)
4456 port->operating_snk_mw = mw / 1000;
4458 port->self_powered = fwnode_property_read_bool(fwnode, "self-powered");
4463 /* Power Supply access to expose source power information */
4464 enum tcpm_psy_online_states {
4465 TCPM_PSY_OFFLINE = 0,
4466 TCPM_PSY_FIXED_ONLINE,
4467 TCPM_PSY_PROG_ONLINE,
4470 static enum power_supply_property tcpm_psy_props[] = {
4471 POWER_SUPPLY_PROP_USB_TYPE,
4472 POWER_SUPPLY_PROP_ONLINE,
4473 POWER_SUPPLY_PROP_VOLTAGE_MIN,
4474 POWER_SUPPLY_PROP_VOLTAGE_MAX,
4475 POWER_SUPPLY_PROP_VOLTAGE_NOW,
4476 POWER_SUPPLY_PROP_CURRENT_MAX,
4477 POWER_SUPPLY_PROP_CURRENT_NOW,
4480 static int tcpm_psy_get_online(struct tcpm_port *port,
4481 union power_supply_propval *val)
4483 if (port->vbus_charge) {
4484 if (port->pps_data.active)
4485 val->intval = TCPM_PSY_PROG_ONLINE;
4487 val->intval = TCPM_PSY_FIXED_ONLINE;
4489 val->intval = TCPM_PSY_OFFLINE;
4495 static int tcpm_psy_get_voltage_min(struct tcpm_port *port,
4496 union power_supply_propval *val)
4498 if (port->pps_data.active)
4499 val->intval = port->pps_data.min_volt * 1000;
4501 val->intval = port->supply_voltage * 1000;
4506 static int tcpm_psy_get_voltage_max(struct tcpm_port *port,
4507 union power_supply_propval *val)
4509 if (port->pps_data.active)
4510 val->intval = port->pps_data.max_volt * 1000;
4512 val->intval = port->supply_voltage * 1000;
4517 static int tcpm_psy_get_voltage_now(struct tcpm_port *port,
4518 union power_supply_propval *val)
4520 val->intval = port->supply_voltage * 1000;
4525 static int tcpm_psy_get_current_max(struct tcpm_port *port,
4526 union power_supply_propval *val)
4528 if (port->pps_data.active)
4529 val->intval = port->pps_data.max_curr * 1000;
4531 val->intval = port->current_limit * 1000;
4536 static int tcpm_psy_get_current_now(struct tcpm_port *port,
4537 union power_supply_propval *val)
4539 val->intval = port->current_limit * 1000;
4544 static int tcpm_psy_get_prop(struct power_supply *psy,
4545 enum power_supply_property psp,
4546 union power_supply_propval *val)
4548 struct tcpm_port *port = power_supply_get_drvdata(psy);
4552 case POWER_SUPPLY_PROP_USB_TYPE:
4553 val->intval = port->usb_type;
4555 case POWER_SUPPLY_PROP_ONLINE:
4556 ret = tcpm_psy_get_online(port, val);
4558 case POWER_SUPPLY_PROP_VOLTAGE_MIN:
4559 ret = tcpm_psy_get_voltage_min(port, val);
4561 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
4562 ret = tcpm_psy_get_voltage_max(port, val);
4564 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4565 ret = tcpm_psy_get_voltage_now(port, val);
4567 case POWER_SUPPLY_PROP_CURRENT_MAX:
4568 ret = tcpm_psy_get_current_max(port, val);
4570 case POWER_SUPPLY_PROP_CURRENT_NOW:
4571 ret = tcpm_psy_get_current_now(port, val);
4581 static int tcpm_psy_set_online(struct tcpm_port *port,
4582 const union power_supply_propval *val)
4586 switch (val->intval) {
4587 case TCPM_PSY_FIXED_ONLINE:
4588 ret = tcpm_pps_activate(port, false);
4590 case TCPM_PSY_PROG_ONLINE:
4591 ret = tcpm_pps_activate(port, true);
4601 static int tcpm_psy_set_prop(struct power_supply *psy,
4602 enum power_supply_property psp,
4603 const union power_supply_propval *val)
4605 struct tcpm_port *port = power_supply_get_drvdata(psy);
4609 case POWER_SUPPLY_PROP_ONLINE:
4610 ret = tcpm_psy_set_online(port, val);
4612 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4613 if (val->intval < port->pps_data.min_volt * 1000 ||
4614 val->intval > port->pps_data.max_volt * 1000)
4617 ret = tcpm_pps_set_out_volt(port, val->intval / 1000);
4619 case POWER_SUPPLY_PROP_CURRENT_NOW:
4620 if (val->intval > port->pps_data.max_curr * 1000)
4623 ret = tcpm_pps_set_op_curr(port, val->intval / 1000);
4633 static int tcpm_psy_prop_writeable(struct power_supply *psy,
4634 enum power_supply_property psp)
4637 case POWER_SUPPLY_PROP_ONLINE:
4638 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4639 case POWER_SUPPLY_PROP_CURRENT_NOW:
4646 static enum power_supply_usb_type tcpm_psy_usb_types[] = {
4647 POWER_SUPPLY_USB_TYPE_C,
4648 POWER_SUPPLY_USB_TYPE_PD,
4649 POWER_SUPPLY_USB_TYPE_PD_PPS,
4652 static const char *tcpm_psy_name_prefix = "tcpm-source-psy-";
4654 static int devm_tcpm_psy_register(struct tcpm_port *port)
4656 struct power_supply_config psy_cfg = {};
4657 const char *port_dev_name = dev_name(port->dev);
4658 size_t psy_name_len = strlen(tcpm_psy_name_prefix) +
4659 strlen(port_dev_name) + 1;
4662 psy_cfg.drv_data = port;
4663 psy_cfg.fwnode = dev_fwnode(port->dev);
4664 psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL);
4668 snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix,
4670 port->psy_desc.name = psy_name;
4671 port->psy_desc.type = POWER_SUPPLY_TYPE_USB,
4672 port->psy_desc.usb_types = tcpm_psy_usb_types;
4673 port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types);
4674 port->psy_desc.properties = tcpm_psy_props,
4675 port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props),
4676 port->psy_desc.get_property = tcpm_psy_get_prop,
4677 port->psy_desc.set_property = tcpm_psy_set_prop,
4678 port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable,
4680 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
4682 port->psy = devm_power_supply_register(port->dev, &port->psy_desc,
4685 return PTR_ERR_OR_ZERO(port->psy);
4688 static int tcpm_copy_caps(struct tcpm_port *port,
4689 const struct tcpc_config *tcfg)
4691 if (tcpm_validate_caps(port, tcfg->src_pdo, tcfg->nr_src_pdo) ||
4692 tcpm_validate_caps(port, tcfg->snk_pdo, tcfg->nr_snk_pdo))
4695 port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcfg->src_pdo,
4697 port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcfg->snk_pdo,
4700 port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcfg->snk_vdo,
4703 port->operating_snk_mw = tcfg->operating_snk_mw;
4705 port->typec_caps.prefer_role = tcfg->default_role;
4706 port->typec_caps.type = tcfg->type;
4707 port->typec_caps.data = tcfg->data;
4708 port->self_powered = port->tcpc->config->self_powered;
4713 struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
4715 struct tcpm_port *port;
4718 if (!dev || !tcpc ||
4719 !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc ||
4720 !tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus ||
4721 !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit)
4722 return ERR_PTR(-EINVAL);
4724 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
4726 return ERR_PTR(-ENOMEM);
4731 mutex_init(&port->lock);
4732 mutex_init(&port->swap_lock);
4734 port->wq = create_singlethread_workqueue(dev_name(dev));
4736 return ERR_PTR(-ENOMEM);
4737 INIT_DELAYED_WORK(&port->state_machine, tcpm_state_machine_work);
4738 INIT_DELAYED_WORK(&port->vdm_state_machine, vdm_state_machine_work);
4739 INIT_WORK(&port->event_work, tcpm_pd_event_handler);
4741 spin_lock_init(&port->pd_event_lock);
4743 init_completion(&port->tx_complete);
4744 init_completion(&port->swap_complete);
4745 init_completion(&port->pps_complete);
4746 tcpm_debugfs_init(port);
4748 err = tcpm_fw_get_caps(port, tcpc->fwnode);
4749 if ((err < 0) && tcpc->config)
4750 err = tcpm_copy_caps(port, tcpc->config);
4752 goto out_destroy_wq;
4754 if (!tcpc->config || !tcpc->config->try_role_hw)
4755 port->try_role = port->typec_caps.prefer_role;
4757 port->try_role = TYPEC_NO_PREFERRED_ROLE;
4759 port->typec_caps.fwnode = tcpc->fwnode;
4760 port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */
4761 port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */
4762 port->typec_caps.dr_set = tcpm_dr_set;
4763 port->typec_caps.pr_set = tcpm_pr_set;
4764 port->typec_caps.vconn_set = tcpm_vconn_set;
4765 port->typec_caps.try_role = tcpm_try_role;
4766 port->typec_caps.port_type_set = tcpm_port_type_set;
4768 port->partner_desc.identity = &port->partner_ident;
4769 port->port_type = port->typec_caps.type;
4771 port->role_sw = usb_role_switch_get(port->dev);
4772 if (IS_ERR(port->role_sw)) {
4773 err = PTR_ERR(port->role_sw);
4774 goto out_destroy_wq;
4777 err = devm_tcpm_psy_register(port);
4779 goto out_role_sw_put;
4781 port->typec_port = typec_register_port(port->dev, &port->typec_caps);
4782 if (IS_ERR(port->typec_port)) {
4783 err = PTR_ERR(port->typec_port);
4784 goto out_role_sw_put;
4787 if (tcpc->config && tcpc->config->alt_modes) {
4788 const struct typec_altmode_desc *paltmode = tcpc->config->alt_modes;
4791 while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) {
4792 struct typec_altmode *alt;
4794 alt = typec_port_register_altmode(port->typec_port,
4798 "%s: failed to register port alternate mode 0x%x",
4799 dev_name(dev), paltmode->svid);
4802 typec_altmode_set_drvdata(alt, port);
4803 alt->ops = &tcpm_altmode_ops;
4804 port->port_altmode[i] = alt;
4810 mutex_lock(&port->lock);
4812 mutex_unlock(&port->lock);
4814 tcpm_log(port, "%s: registered", dev_name(dev));
4818 usb_role_switch_put(port->role_sw);
4820 tcpm_debugfs_exit(port);
4821 destroy_workqueue(port->wq);
4822 return ERR_PTR(err);
4824 EXPORT_SYMBOL_GPL(tcpm_register_port);
4826 void tcpm_unregister_port(struct tcpm_port *port)
4830 tcpm_reset_port(port);
4831 for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++)
4832 typec_unregister_altmode(port->port_altmode[i]);
4833 typec_unregister_port(port->typec_port);
4834 usb_role_switch_put(port->role_sw);
4835 tcpm_debugfs_exit(port);
4836 destroy_workqueue(port->wq);
4838 EXPORT_SYMBOL_GPL(tcpm_unregister_port);
4840 MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>");
4841 MODULE_DESCRIPTION("USB Type-C Port Manager");
4842 MODULE_LICENSE("GPL");