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_NEGOTIATE_CAPABILITIES), \
41 S(SRC_TRANSITION_SUPPLY), \
43 S(SRC_WAIT_NEW_CAPABILITIES), \
51 S(SNK_DISCOVERY_DEBOUNCE), \
52 S(SNK_DISCOVERY_DEBOUNCE_DONE), \
53 S(SNK_WAIT_CAPABILITIES), \
54 S(SNK_NEGOTIATE_CAPABILITIES), \
55 S(SNK_NEGOTIATE_PPS_CAPABILITIES), \
56 S(SNK_TRANSITION_SINK), \
57 S(SNK_TRANSITION_SINK_VBUS), \
61 S(DEBUG_ACC_ATTACHED), \
62 S(AUDIO_ACC_ATTACHED), \
63 S(AUDIO_ACC_DEBOUNCE), \
66 S(HARD_RESET_START), \
67 S(SRC_HARD_RESET_VBUS_OFF), \
68 S(SRC_HARD_RESET_VBUS_ON), \
69 S(SNK_HARD_RESET_SINK_OFF), \
70 S(SNK_HARD_RESET_WAIT_VBUS), \
71 S(SNK_HARD_RESET_SINK_ON), \
78 S(DR_SWAP_SEND_TIMEOUT), \
80 S(DR_SWAP_CHANGE_DR), \
84 S(PR_SWAP_SEND_TIMEOUT), \
87 S(PR_SWAP_SRC_SNK_TRANSITION_OFF), \
88 S(PR_SWAP_SRC_SNK_SOURCE_OFF), \
89 S(PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED), \
90 S(PR_SWAP_SRC_SNK_SINK_ON), \
91 S(PR_SWAP_SNK_SRC_SINK_OFF), \
92 S(PR_SWAP_SNK_SRC_SOURCE_ON), \
93 S(PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP), \
95 S(VCONN_SWAP_ACCEPT), \
97 S(VCONN_SWAP_SEND_TIMEOUT), \
98 S(VCONN_SWAP_CANCEL), \
99 S(VCONN_SWAP_START), \
100 S(VCONN_SWAP_WAIT_FOR_VCONN), \
101 S(VCONN_SWAP_TURN_ON_VCONN), \
102 S(VCONN_SWAP_TURN_OFF_VCONN), \
106 S(SNK_TRY_WAIT_DEBOUNCE), \
107 S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \
109 S(SRC_TRYWAIT_DEBOUNCE), \
110 S(SRC_TRYWAIT_UNATTACHED), \
114 S(SRC_TRY_DEBOUNCE), \
116 S(SNK_TRYWAIT_DEBOUNCE), \
117 S(SNK_TRYWAIT_VBUS), \
120 S(GET_STATUS_SEND), \
121 S(GET_STATUS_SEND_TIMEOUT), \
122 S(GET_PPS_STATUS_SEND), \
123 S(GET_PPS_STATUS_SEND_TIMEOUT), \
127 S(PORT_RESET_WAIT_OFF)
129 #define GENERATE_ENUM(e) e
130 #define GENERATE_STRING(s) #s
133 FOREACH_STATE(GENERATE_ENUM)
136 static const char * const tcpm_states[] = {
137 FOREACH_STATE(GENERATE_STRING)
141 VDM_STATE_ERR_BUSY = -3,
142 VDM_STATE_ERR_SEND = -2,
143 VDM_STATE_ERR_TMOUT = -1,
145 /* Anything >0 represents an active state */
148 VDM_STATE_WAIT_RSP_BUSY = 3,
151 enum pd_msg_request {
155 PD_MSG_CTRL_NOT_SUPP,
156 PD_MSG_DATA_SINK_CAP,
157 PD_MSG_DATA_SOURCE_CAP,
160 /* Events from low level driver */
162 #define TCPM_CC_EVENT BIT(0)
163 #define TCPM_VBUS_EVENT BIT(1)
164 #define TCPM_RESET_EVENT BIT(2)
166 #define LOG_BUFFER_ENTRIES 1024
167 #define LOG_BUFFER_ENTRY_SIZE 128
169 /* Alternate mode support */
171 #define SVID_DISCOVERY_MAX 16
172 #define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX)
174 struct pd_mode_data {
175 int svid_index; /* current SVID index */
177 u16 svids[SVID_DISCOVERY_MAX];
178 int altmodes; /* number of alternate modes */
179 struct typec_altmode_desc altmode_desc[ALTMODE_DISCOVERY_MAX];
195 struct mutex lock; /* tcpm state machine lock */
196 struct workqueue_struct *wq;
198 struct typec_capability typec_caps;
199 struct typec_port *typec_port;
201 struct tcpc_dev *tcpc;
202 struct usb_role_switch *role_sw;
204 enum typec_role vconn_role;
205 enum typec_role pwr_role;
206 enum typec_data_role data_role;
207 enum typec_pwr_opmode pwr_opmode;
209 struct usb_pd_identity partner_ident;
210 struct typec_partner_desc partner_desc;
211 struct typec_partner *partner;
213 enum typec_cc_status cc_req;
215 enum typec_cc_status cc1;
216 enum typec_cc_status cc2;
217 enum typec_cc_polarity polarity;
221 enum typec_port_type port_type;
234 enum pd_msg_request queued_message;
236 enum tcpm_state enter_state;
237 enum tcpm_state prev_state;
238 enum tcpm_state state;
239 enum tcpm_state delayed_state;
240 unsigned long delayed_runtime;
241 unsigned long delay_ms;
243 spinlock_t pd_event_lock;
246 struct work_struct event_work;
247 struct delayed_work state_machine;
248 struct delayed_work vdm_state_machine;
249 bool state_machine_running;
251 struct completion tx_complete;
252 enum tcpm_transmit_status tx_status;
254 struct mutex swap_lock; /* swap command lock */
256 bool non_pd_role_swap;
257 struct completion swap_complete;
260 unsigned int negotiated_rev;
261 unsigned int message_id;
262 unsigned int caps_count;
263 unsigned int hard_reset_count;
265 bool explicit_contract;
266 unsigned int rx_msgid;
268 /* Partner capabilities/requests */
270 u32 source_caps[PDO_MAX_OBJECTS];
271 unsigned int nr_source_caps;
272 u32 sink_caps[PDO_MAX_OBJECTS];
273 unsigned int nr_sink_caps;
275 /* Local capabilities */
276 u32 src_pdo[PDO_MAX_OBJECTS];
277 unsigned int nr_src_pdo;
278 u32 snk_pdo[PDO_MAX_OBJECTS];
279 unsigned int nr_snk_pdo;
280 u32 snk_vdo[VDO_MAX_OBJECTS];
281 unsigned int nr_snk_vdo;
283 unsigned int operating_snk_mw;
284 bool update_sink_caps;
286 /* Requested current / voltage */
290 /* Used to export TA voltage and current */
291 struct power_supply *psy;
292 struct power_supply_desc psy_desc;
293 enum power_supply_usb_type usb_type;
297 /* PD state for Vendor Defined Messages */
298 enum vdm_states vdm_state;
300 /* next Vendor Defined Message to send */
301 u32 vdo_data[VDO_MAX_SIZE];
303 /* VDO to retry if UFP responder replied busy */
307 struct pd_pps_data pps_data;
308 struct completion pps_complete;
312 /* Alternate mode data */
313 struct pd_mode_data mode_data;
314 struct typec_altmode *partner_altmode[ALTMODE_DISCOVERY_MAX];
315 struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX];
317 /* Deadline in jiffies to exit src_try_wait state */
318 unsigned long max_wait;
320 #ifdef CONFIG_DEBUG_FS
321 struct dentry *dentry;
322 struct mutex logbuffer_lock; /* log buffer access lock */
325 u8 *logbuffer[LOG_BUFFER_ENTRIES];
330 struct work_struct work;
331 struct tcpm_port *port;
332 struct pd_message msg;
335 #define tcpm_cc_is_sink(cc) \
336 ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \
337 (cc) == TYPEC_CC_RP_3_0)
339 #define tcpm_port_is_sink(port) \
340 ((tcpm_cc_is_sink((port)->cc1) && !tcpm_cc_is_sink((port)->cc2)) || \
341 (tcpm_cc_is_sink((port)->cc2) && !tcpm_cc_is_sink((port)->cc1)))
343 #define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD)
344 #define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA)
345 #define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN)
347 #define tcpm_port_is_source(port) \
348 ((tcpm_cc_is_source((port)->cc1) && \
349 !tcpm_cc_is_source((port)->cc2)) || \
350 (tcpm_cc_is_source((port)->cc2) && \
351 !tcpm_cc_is_source((port)->cc1)))
353 #define tcpm_port_is_debug(port) \
354 (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2))
356 #define tcpm_port_is_audio(port) \
357 (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2))
359 #define tcpm_port_is_audio_detached(port) \
360 ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \
361 (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1)))
363 #define tcpm_try_snk(port) \
364 ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \
365 (port)->port_type == TYPEC_PORT_DRP)
367 #define tcpm_try_src(port) \
368 ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \
369 (port)->port_type == TYPEC_PORT_DRP)
371 static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
373 if (port->port_type == TYPEC_PORT_DRP) {
374 if (port->try_role == TYPEC_SINK)
375 return SNK_UNATTACHED;
376 else if (port->try_role == TYPEC_SOURCE)
377 return SRC_UNATTACHED;
378 else if (port->tcpc->config->default_role == TYPEC_SINK)
379 return SNK_UNATTACHED;
380 /* Fall through to return SRC_UNATTACHED */
381 } else if (port->port_type == TYPEC_PORT_SNK) {
382 return SNK_UNATTACHED;
384 return SRC_UNATTACHED;
388 struct tcpm_port *typec_cap_to_tcpm(const struct typec_capability *cap)
390 return container_of(cap, struct tcpm_port, typec_caps);
393 static bool tcpm_port_is_disconnected(struct tcpm_port *port)
395 return (!port->attached && port->cc1 == TYPEC_CC_OPEN &&
396 port->cc2 == TYPEC_CC_OPEN) ||
397 (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 &&
398 port->cc1 == TYPEC_CC_OPEN) ||
399 (port->polarity == TYPEC_POLARITY_CC2 &&
400 port->cc2 == TYPEC_CC_OPEN)));
407 #ifdef CONFIG_DEBUG_FS
409 static bool tcpm_log_full(struct tcpm_port *port)
411 return port->logbuffer_tail ==
412 (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
416 static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args)
418 char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
419 u64 ts_nsec = local_clock();
420 unsigned long rem_nsec;
422 mutex_lock(&port->logbuffer_lock);
423 if (!port->logbuffer[port->logbuffer_head]) {
424 port->logbuffer[port->logbuffer_head] =
425 kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
426 if (!port->logbuffer[port->logbuffer_head]) {
427 mutex_unlock(&port->logbuffer_lock);
432 vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
434 if (tcpm_log_full(port)) {
435 port->logbuffer_head = max(port->logbuffer_head - 1, 0);
436 strcpy(tmpbuffer, "overflow");
439 if (port->logbuffer_head < 0 ||
440 port->logbuffer_head >= LOG_BUFFER_ENTRIES) {
442 "Bad log buffer index %d\n", port->logbuffer_head);
446 if (!port->logbuffer[port->logbuffer_head]) {
448 "Log buffer index %d is NULL\n", port->logbuffer_head);
452 rem_nsec = do_div(ts_nsec, 1000000000);
453 scnprintf(port->logbuffer[port->logbuffer_head],
454 LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
455 (unsigned long)ts_nsec, rem_nsec / 1000,
457 port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
460 mutex_unlock(&port->logbuffer_lock);
464 static void tcpm_log(struct tcpm_port *port, const char *fmt, ...)
468 /* Do not log while disconnected and unattached */
469 if (tcpm_port_is_disconnected(port) &&
470 (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED ||
471 port->state == DRP_TOGGLING))
475 _tcpm_log(port, fmt, args);
480 static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...)
485 _tcpm_log(port, fmt, args);
489 static void tcpm_log_source_caps(struct tcpm_port *port)
493 for (i = 0; i < port->nr_source_caps; i++) {
494 u32 pdo = port->source_caps[i];
495 enum pd_pdo_type type = pdo_type(pdo);
500 scnprintf(msg, sizeof(msg),
501 "%u mV, %u mA [%s%s%s%s%s%s]",
502 pdo_fixed_voltage(pdo),
503 pdo_max_current(pdo),
504 (pdo & PDO_FIXED_DUAL_ROLE) ?
506 (pdo & PDO_FIXED_SUSPEND) ?
508 (pdo & PDO_FIXED_HIGHER_CAP) ?
510 (pdo & PDO_FIXED_USB_COMM) ?
512 (pdo & PDO_FIXED_DATA_SWAP) ?
514 (pdo & PDO_FIXED_EXTPOWER) ?
518 scnprintf(msg, sizeof(msg),
520 pdo_min_voltage(pdo),
521 pdo_max_voltage(pdo),
522 pdo_max_current(pdo));
525 scnprintf(msg, sizeof(msg),
527 pdo_min_voltage(pdo),
528 pdo_max_voltage(pdo),
532 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS)
533 scnprintf(msg, sizeof(msg),
535 pdo_pps_apdo_min_voltage(pdo),
536 pdo_pps_apdo_max_voltage(pdo),
537 pdo_pps_apdo_max_current(pdo));
539 strcpy(msg, "undefined APDO");
542 strcpy(msg, "undefined");
545 tcpm_log(port, " PDO %d: type %d, %s",
550 static int tcpm_debug_show(struct seq_file *s, void *v)
552 struct tcpm_port *port = (struct tcpm_port *)s->private;
555 mutex_lock(&port->logbuffer_lock);
556 tail = port->logbuffer_tail;
557 while (tail != port->logbuffer_head) {
558 seq_printf(s, "%s\n", port->logbuffer[tail]);
559 tail = (tail + 1) % LOG_BUFFER_ENTRIES;
561 if (!seq_has_overflowed(s))
562 port->logbuffer_tail = tail;
563 mutex_unlock(&port->logbuffer_lock);
567 DEFINE_SHOW_ATTRIBUTE(tcpm_debug);
569 static struct dentry *rootdir;
571 static void tcpm_debugfs_init(struct tcpm_port *port)
573 mutex_init(&port->logbuffer_lock);
574 /* /sys/kernel/debug/tcpm/usbcX */
576 rootdir = debugfs_create_dir("tcpm", NULL);
578 port->dentry = debugfs_create_file(dev_name(port->dev),
579 S_IFREG | 0444, rootdir,
580 port, &tcpm_debug_fops);
583 static void tcpm_debugfs_exit(struct tcpm_port *port)
585 debugfs_remove(port->dentry);
591 static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { }
593 static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { }
594 static void tcpm_log_source_caps(struct tcpm_port *port) { }
595 static void tcpm_debugfs_init(const struct tcpm_port *port) { }
596 static void tcpm_debugfs_exit(const struct tcpm_port *port) { }
600 static int tcpm_pd_transmit(struct tcpm_port *port,
601 enum tcpm_transmit_type type,
602 const struct pd_message *msg)
604 unsigned long timeout;
608 tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header));
610 tcpm_log(port, "PD TX, type: %#x", type);
612 reinit_completion(&port->tx_complete);
613 ret = port->tcpc->pd_transmit(port->tcpc, type, msg);
617 mutex_unlock(&port->lock);
618 timeout = wait_for_completion_timeout(&port->tx_complete,
619 msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT));
620 mutex_lock(&port->lock);
624 switch (port->tx_status) {
625 case TCPC_TX_SUCCESS:
626 port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK;
628 case TCPC_TX_DISCARDED:
636 void tcpm_pd_transmit_complete(struct tcpm_port *port,
637 enum tcpm_transmit_status status)
639 tcpm_log(port, "PD TX complete, status: %u", status);
640 port->tx_status = status;
641 complete(&port->tx_complete);
643 EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete);
645 static int tcpm_mux_set(struct tcpm_port *port, int state,
646 enum usb_role usb_role,
647 enum typec_orientation orientation)
651 tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d",
652 state, usb_role, orientation);
654 ret = typec_set_orientation(port->typec_port, orientation);
659 ret = usb_role_switch_set_role(port->role_sw, usb_role);
664 return typec_set_mode(port->typec_port, state);
667 static int tcpm_set_polarity(struct tcpm_port *port,
668 enum typec_cc_polarity polarity)
672 tcpm_log(port, "polarity %d", polarity);
674 ret = port->tcpc->set_polarity(port->tcpc, polarity);
678 port->polarity = polarity;
683 static int tcpm_set_vconn(struct tcpm_port *port, bool enable)
687 tcpm_log(port, "vconn:=%d", enable);
689 ret = port->tcpc->set_vconn(port->tcpc, enable);
691 port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK;
692 typec_set_vconn_role(port->typec_port, port->vconn_role);
698 static u32 tcpm_get_current_limit(struct tcpm_port *port)
700 enum typec_cc_status cc;
703 cc = port->polarity ? port->cc2 : port->cc1;
705 case TYPEC_CC_RP_1_5:
708 case TYPEC_CC_RP_3_0:
711 case TYPEC_CC_RP_DEF:
713 if (port->tcpc->get_current_limit)
714 limit = port->tcpc->get_current_limit(port->tcpc);
723 static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv)
725 int ret = -EOPNOTSUPP;
727 tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma);
729 port->supply_voltage = mv;
730 port->current_limit = max_ma;
732 if (port->tcpc->set_current_limit)
733 ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv);
739 * Determine RP value to set based on maximum current supported
740 * by a port if configured as source.
741 * Returns CC value to report to link partner.
743 static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port)
745 const u32 *src_pdo = port->src_pdo;
746 int nr_pdo = port->nr_src_pdo;
750 * Search for first entry with matching voltage.
751 * It should report the maximum supported current.
753 for (i = 0; i < nr_pdo; i++) {
754 const u32 pdo = src_pdo[i];
756 if (pdo_type(pdo) == PDO_TYPE_FIXED &&
757 pdo_fixed_voltage(pdo) == 5000) {
758 unsigned int curr = pdo_max_current(pdo);
761 return TYPEC_CC_RP_3_0;
762 else if (curr >= 1500)
763 return TYPEC_CC_RP_1_5;
764 return TYPEC_CC_RP_DEF;
768 return TYPEC_CC_RP_DEF;
771 static int tcpm_set_attached_state(struct tcpm_port *port, bool attached)
773 return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role,
777 static int tcpm_set_roles(struct tcpm_port *port, bool attached,
778 enum typec_role role, enum typec_data_role data)
780 enum typec_orientation orientation;
781 enum usb_role usb_role;
784 if (port->polarity == TYPEC_POLARITY_CC1)
785 orientation = TYPEC_ORIENTATION_NORMAL;
787 orientation = TYPEC_ORIENTATION_REVERSE;
789 if (data == TYPEC_HOST)
790 usb_role = USB_ROLE_HOST;
792 usb_role = USB_ROLE_DEVICE;
794 ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation);
798 ret = port->tcpc->set_roles(port->tcpc, attached, role, data);
802 port->pwr_role = role;
803 port->data_role = data;
804 typec_set_data_role(port->typec_port, data);
805 typec_set_pwr_role(port->typec_port, role);
810 static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role)
814 ret = port->tcpc->set_roles(port->tcpc, true, role,
819 port->pwr_role = role;
820 typec_set_pwr_role(port->typec_port, role);
825 static int tcpm_pd_send_source_caps(struct tcpm_port *port)
827 struct pd_message msg;
830 memset(&msg, 0, sizeof(msg));
831 if (!port->nr_src_pdo) {
832 /* No source capabilities defined, sink only */
833 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
836 port->negotiated_rev,
837 port->message_id, 0);
839 msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP,
842 port->negotiated_rev,
846 for (i = 0; i < port->nr_src_pdo; i++)
847 msg.payload[i] = cpu_to_le32(port->src_pdo[i]);
849 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
852 static int tcpm_pd_send_sink_caps(struct tcpm_port *port)
854 struct pd_message msg;
857 memset(&msg, 0, sizeof(msg));
858 if (!port->nr_snk_pdo) {
859 /* No sink capabilities defined, source only */
860 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
863 port->negotiated_rev,
864 port->message_id, 0);
866 msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP,
869 port->negotiated_rev,
873 for (i = 0; i < port->nr_snk_pdo; i++)
874 msg.payload[i] = cpu_to_le32(port->snk_pdo[i]);
876 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
879 static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state,
880 unsigned int delay_ms)
883 tcpm_log(port, "pending state change %s -> %s @ %u ms",
884 tcpm_states[port->state], tcpm_states[state],
886 port->delayed_state = state;
887 mod_delayed_work(port->wq, &port->state_machine,
888 msecs_to_jiffies(delay_ms));
889 port->delayed_runtime = jiffies + msecs_to_jiffies(delay_ms);
890 port->delay_ms = delay_ms;
892 tcpm_log(port, "state change %s -> %s",
893 tcpm_states[port->state], tcpm_states[state]);
894 port->delayed_state = INVALID_STATE;
895 port->prev_state = port->state;
898 * Don't re-queue the state machine work item if we're currently
899 * in the state machine and we're immediately changing states.
900 * tcpm_state_machine_work() will continue running the state
903 if (!port->state_machine_running)
904 mod_delayed_work(port->wq, &port->state_machine, 0);
908 static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state,
909 unsigned int delay_ms)
911 if (port->enter_state == port->state)
912 tcpm_set_state(port, state, delay_ms);
915 "skipped %sstate change %s -> %s [%u ms], context state %s",
916 delay_ms ? "delayed " : "",
917 tcpm_states[port->state], tcpm_states[state],
918 delay_ms, tcpm_states[port->enter_state]);
921 static void tcpm_queue_message(struct tcpm_port *port,
922 enum pd_msg_request message)
924 port->queued_message = message;
925 mod_delayed_work(port->wq, &port->state_machine, 0);
929 * VDM/VDO handling functions
931 static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
932 const u32 *data, int cnt)
934 port->vdo_count = cnt + 1;
935 port->vdo_data[0] = header;
936 memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt);
937 /* Set ready, vdm state machine will actually send */
938 port->vdm_retries = 0;
939 port->vdm_state = VDM_STATE_READY;
942 static void svdm_consume_identity(struct tcpm_port *port, const __le32 *payload,
945 u32 vdo = le32_to_cpu(payload[VDO_INDEX_IDH]);
946 u32 product = le32_to_cpu(payload[VDO_INDEX_PRODUCT]);
948 memset(&port->mode_data, 0, sizeof(port->mode_data));
950 port->partner_ident.id_header = vdo;
951 port->partner_ident.cert_stat = le32_to_cpu(payload[VDO_INDEX_CSTAT]);
952 port->partner_ident.product = product;
954 typec_partner_set_identity(port->partner);
956 tcpm_log(port, "Identity: %04x:%04x.%04x",
958 PD_PRODUCT_PID(product), product & 0xffff);
961 static bool svdm_consume_svids(struct tcpm_port *port, const __le32 *payload,
964 struct pd_mode_data *pmdata = &port->mode_data;
967 for (i = 1; i < cnt; i++) {
968 u32 p = le32_to_cpu(payload[i]);
971 svid = (p >> 16) & 0xffff;
975 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
978 pmdata->svids[pmdata->nsvids++] = svid;
979 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
985 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
988 pmdata->svids[pmdata->nsvids++] = svid;
989 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
993 tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX);
997 static void svdm_consume_modes(struct tcpm_port *port, const __le32 *payload,
1000 struct pd_mode_data *pmdata = &port->mode_data;
1001 struct typec_altmode_desc *paltmode;
1004 if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) {
1005 /* Already logged in svdm_consume_svids() */
1009 for (i = 1; i < cnt; i++) {
1010 paltmode = &pmdata->altmode_desc[pmdata->altmodes];
1011 memset(paltmode, 0, sizeof(*paltmode));
1013 paltmode->svid = pmdata->svids[pmdata->svid_index];
1015 paltmode->vdo = le32_to_cpu(payload[i]);
1017 tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x",
1018 pmdata->altmodes, paltmode->svid,
1019 paltmode->mode, paltmode->vdo);
1025 static void tcpm_register_partner_altmodes(struct tcpm_port *port)
1027 struct pd_mode_data *modep = &port->mode_data;
1028 struct typec_altmode *altmode;
1031 for (i = 0; i < modep->altmodes; i++) {
1032 altmode = typec_partner_register_altmode(port->partner,
1033 &modep->altmode_desc[i]);
1035 tcpm_log(port, "Failed to register partner SVID 0x%04x",
1036 modep->altmode_desc[i].svid);
1037 port->partner_altmode[i] = altmode;
1041 #define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header)
1043 static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt,
1046 struct typec_altmode *adev;
1047 struct typec_altmode *pdev;
1048 struct pd_mode_data *modep;
1049 u32 p[PD_MAX_PAYLOAD];
1055 for (i = 0; i < cnt; i++)
1056 p[i] = le32_to_cpu(payload[i]);
1058 cmd_type = PD_VDO_CMDT(p[0]);
1059 cmd = PD_VDO_CMD(p[0]);
1061 tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d",
1062 p[0], cmd_type, cmd, cnt);
1064 modep = &port->mode_data;
1066 adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX,
1067 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1069 pdev = typec_match_altmode(port->partner_altmode, ALTMODE_DISCOVERY_MAX,
1070 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1075 case CMD_DISCOVER_IDENT:
1076 /* 6.4.4.3.1: Only respond as UFP (device) */
1077 if (port->data_role == TYPEC_DEVICE &&
1079 for (i = 0; i < port->nr_snk_vdo; i++)
1080 response[i + 1] = port->snk_vdo[i];
1081 rlen = port->nr_snk_vdo + 1;
1084 case CMD_DISCOVER_SVID:
1086 case CMD_DISCOVER_MODES:
1088 case CMD_ENTER_MODE:
1093 /* Attention command does not have response */
1094 typec_altmode_attention(adev, p[1]);
1100 response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK);
1101 } else if (rlen == 0) {
1102 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
1105 response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY);
1110 /* silently drop message if we are not connected */
1111 if (IS_ERR_OR_NULL(port->partner))
1115 case CMD_DISCOVER_IDENT:
1117 svdm_consume_identity(port, payload, cnt);
1118 response[0] = VDO(USB_SID_PD, 1, CMD_DISCOVER_SVID);
1121 case CMD_DISCOVER_SVID:
1123 if (svdm_consume_svids(port, payload, cnt)) {
1124 response[0] = VDO(USB_SID_PD, 1,
1127 } else if (modep->nsvids && supports_modal(port)) {
1128 response[0] = VDO(modep->svids[0], 1,
1129 CMD_DISCOVER_MODES);
1133 case CMD_DISCOVER_MODES:
1135 svdm_consume_modes(port, payload, cnt);
1136 modep->svid_index++;
1137 if (modep->svid_index < modep->nsvids) {
1138 u16 svid = modep->svids[modep->svid_index];
1139 response[0] = VDO(svid, 1, CMD_DISCOVER_MODES);
1142 tcpm_register_partner_altmodes(port);
1145 case CMD_ENTER_MODE:
1146 typec_altmode_update_active(pdev, true);
1148 if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
1149 response[0] = VDO(adev->svid, 1, CMD_EXIT_MODE);
1150 response[0] |= VDO_OPOS(adev->mode);
1155 typec_altmode_update_active(pdev, false);
1157 /* Back to USB Operation */
1158 WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB,
1167 case CMD_ENTER_MODE:
1168 /* Back to USB Operation */
1169 WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB,
1180 /* Informing the alternate mode drivers about everything */
1181 typec_altmode_vdm(adev, p[0], &p[1], cnt);
1186 static void tcpm_handle_vdm_request(struct tcpm_port *port,
1187 const __le32 *payload, int cnt)
1190 u32 response[8] = { };
1191 u32 p0 = le32_to_cpu(payload[0]);
1193 if (port->vdm_state == VDM_STATE_BUSY) {
1194 /* If UFP responded busy retry after timeout */
1195 if (PD_VDO_CMDT(p0) == CMDT_RSP_BUSY) {
1196 port->vdm_state = VDM_STATE_WAIT_RSP_BUSY;
1197 port->vdo_retry = (p0 & ~VDO_CMDT_MASK) |
1199 mod_delayed_work(port->wq, &port->vdm_state_machine,
1200 msecs_to_jiffies(PD_T_VDM_BUSY));
1203 port->vdm_state = VDM_STATE_DONE;
1206 if (PD_VDO_SVDM(p0))
1207 rlen = tcpm_pd_svdm(port, payload, cnt, response);
1210 tcpm_queue_vdm(port, response[0], &response[1], rlen - 1);
1211 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1215 static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd,
1216 const u32 *data, int count)
1220 if (WARN_ON(count > VDO_MAX_SIZE - 1))
1221 count = VDO_MAX_SIZE - 1;
1223 /* set VDM header with VID & CMD */
1224 header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ?
1225 1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION), cmd);
1226 tcpm_queue_vdm(port, header, data, count);
1228 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1231 static unsigned int vdm_ready_timeout(u32 vdm_hdr)
1233 unsigned int timeout;
1234 int cmd = PD_VDO_CMD(vdm_hdr);
1236 /* its not a structured VDM command */
1237 if (!PD_VDO_SVDM(vdm_hdr))
1238 return PD_T_VDM_UNSTRUCTURED;
1240 switch (PD_VDO_CMDT(vdm_hdr)) {
1242 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1243 timeout = PD_T_VDM_WAIT_MODE_E;
1245 timeout = PD_T_VDM_SNDR_RSP;
1248 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1249 timeout = PD_T_VDM_E_MODE;
1251 timeout = PD_T_VDM_RCVR_RSP;
1257 static void vdm_run_state_machine(struct tcpm_port *port)
1259 struct pd_message msg;
1262 switch (port->vdm_state) {
1263 case VDM_STATE_READY:
1264 /* Only transmit VDM if attached */
1265 if (!port->attached) {
1266 port->vdm_state = VDM_STATE_ERR_BUSY;
1271 * if there's traffic or we're not in PDO ready state don't send
1274 if (port->state != SRC_READY && port->state != SNK_READY)
1277 /* Prepare and send VDM */
1278 memset(&msg, 0, sizeof(msg));
1279 msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF,
1282 port->negotiated_rev,
1283 port->message_id, port->vdo_count);
1284 for (i = 0; i < port->vdo_count; i++)
1285 msg.payload[i] = cpu_to_le32(port->vdo_data[i]);
1286 res = tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
1288 port->vdm_state = VDM_STATE_ERR_SEND;
1290 unsigned long timeout;
1292 port->vdm_retries = 0;
1293 port->vdm_state = VDM_STATE_BUSY;
1294 timeout = vdm_ready_timeout(port->vdo_data[0]);
1295 mod_delayed_work(port->wq, &port->vdm_state_machine,
1299 case VDM_STATE_WAIT_RSP_BUSY:
1300 port->vdo_data[0] = port->vdo_retry;
1301 port->vdo_count = 1;
1302 port->vdm_state = VDM_STATE_READY;
1304 case VDM_STATE_BUSY:
1305 port->vdm_state = VDM_STATE_ERR_TMOUT;
1307 case VDM_STATE_ERR_SEND:
1309 * A partner which does not support USB PD will not reply,
1310 * so this is not a fatal error. At the same time, some
1311 * devices may not return GoodCRC under some circumstances,
1312 * so we need to retry.
1314 if (port->vdm_retries < 3) {
1315 tcpm_log(port, "VDM Tx error, retry");
1316 port->vdm_retries++;
1317 port->vdm_state = VDM_STATE_READY;
1325 static void vdm_state_machine_work(struct work_struct *work)
1327 struct tcpm_port *port = container_of(work, struct tcpm_port,
1328 vdm_state_machine.work);
1329 enum vdm_states prev_state;
1331 mutex_lock(&port->lock);
1334 * Continue running as long as the port is not busy and there was
1338 prev_state = port->vdm_state;
1339 vdm_run_state_machine(port);
1340 } while (port->vdm_state != prev_state &&
1341 port->vdm_state != VDM_STATE_BUSY);
1343 mutex_unlock(&port->lock);
1349 PDO_ERR_VSAFE5V_NOT_FIRST,
1350 PDO_ERR_PDO_TYPE_NOT_IN_ORDER,
1351 PDO_ERR_FIXED_NOT_SORTED,
1352 PDO_ERR_VARIABLE_BATT_NOT_SORTED,
1354 PDO_ERR_PPS_APDO_NOT_SORTED,
1355 PDO_ERR_DUPE_PPS_APDO,
1358 static const char * const pdo_err_msg[] = {
1359 [PDO_ERR_NO_VSAFE5V] =
1360 " err: source/sink caps should atleast have vSafe5V",
1361 [PDO_ERR_VSAFE5V_NOT_FIRST] =
1362 " err: vSafe5V Fixed Supply Object Shall always be the first object",
1363 [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] =
1364 " err: PDOs should be in the following order: Fixed; Battery; Variable",
1365 [PDO_ERR_FIXED_NOT_SORTED] =
1366 " err: Fixed supply pdos should be in increasing order of their fixed voltage",
1367 [PDO_ERR_VARIABLE_BATT_NOT_SORTED] =
1368 " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage",
1369 [PDO_ERR_DUPE_PDO] =
1370 " err: Variable/Batt supply pdos cannot have same min/max voltage",
1371 [PDO_ERR_PPS_APDO_NOT_SORTED] =
1372 " err: Programmable power supply apdos should be in increasing order of their maximum voltage",
1373 [PDO_ERR_DUPE_PPS_APDO] =
1374 " err: Programmable power supply apdos cannot have same min/max voltage and max current",
1377 static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo,
1378 unsigned int nr_pdo)
1382 /* Should at least contain vSafe5v */
1384 return PDO_ERR_NO_VSAFE5V;
1386 /* The vSafe5V Fixed Supply Object Shall always be the first object */
1387 if (pdo_type(pdo[0]) != PDO_TYPE_FIXED ||
1388 pdo_fixed_voltage(pdo[0]) != VSAFE5V)
1389 return PDO_ERR_VSAFE5V_NOT_FIRST;
1391 for (i = 1; i < nr_pdo; i++) {
1392 if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) {
1393 return PDO_ERR_PDO_TYPE_NOT_IN_ORDER;
1394 } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) {
1395 enum pd_pdo_type type = pdo_type(pdo[i]);
1399 * The remaining Fixed Supply Objects, if
1400 * present, shall be sent in voltage order;
1401 * lowest to highest.
1403 case PDO_TYPE_FIXED:
1404 if (pdo_fixed_voltage(pdo[i]) <=
1405 pdo_fixed_voltage(pdo[i - 1]))
1406 return PDO_ERR_FIXED_NOT_SORTED;
1409 * The Battery Supply Objects and Variable
1410 * supply, if present shall be sent in Minimum
1411 * Voltage order; lowest to highest.
1415 if (pdo_min_voltage(pdo[i]) <
1416 pdo_min_voltage(pdo[i - 1]))
1417 return PDO_ERR_VARIABLE_BATT_NOT_SORTED;
1418 else if ((pdo_min_voltage(pdo[i]) ==
1419 pdo_min_voltage(pdo[i - 1])) &&
1420 (pdo_max_voltage(pdo[i]) ==
1421 pdo_min_voltage(pdo[i - 1])))
1422 return PDO_ERR_DUPE_PDO;
1425 * The Programmable Power Supply APDOs, if present,
1426 * shall be sent in Maximum Voltage order;
1427 * lowest to highest.
1430 if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS)
1433 if (pdo_pps_apdo_max_voltage(pdo[i]) <
1434 pdo_pps_apdo_max_voltage(pdo[i - 1]))
1435 return PDO_ERR_PPS_APDO_NOT_SORTED;
1436 else if (pdo_pps_apdo_min_voltage(pdo[i]) ==
1437 pdo_pps_apdo_min_voltage(pdo[i - 1]) &&
1438 pdo_pps_apdo_max_voltage(pdo[i]) ==
1439 pdo_pps_apdo_max_voltage(pdo[i - 1]) &&
1440 pdo_pps_apdo_max_current(pdo[i]) ==
1441 pdo_pps_apdo_max_current(pdo[i - 1]))
1442 return PDO_ERR_DUPE_PPS_APDO;
1445 tcpm_log_force(port, " Unknown pdo type");
1453 static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo,
1454 unsigned int nr_pdo)
1456 enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo);
1458 if (err_index != PDO_NO_ERR) {
1459 tcpm_log_force(port, " %s", pdo_err_msg[err_index]);
1466 static int tcpm_altmode_enter(struct typec_altmode *altmode)
1468 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1471 mutex_lock(&port->lock);
1472 header = VDO(altmode->svid, 1, CMD_ENTER_MODE);
1473 header |= VDO_OPOS(altmode->mode);
1475 tcpm_queue_vdm(port, header, NULL, 0);
1476 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1477 mutex_unlock(&port->lock);
1482 static int tcpm_altmode_exit(struct typec_altmode *altmode)
1484 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1487 mutex_lock(&port->lock);
1488 header = VDO(altmode->svid, 1, CMD_EXIT_MODE);
1489 header |= VDO_OPOS(altmode->mode);
1491 tcpm_queue_vdm(port, header, NULL, 0);
1492 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1493 mutex_unlock(&port->lock);
1498 static int tcpm_altmode_vdm(struct typec_altmode *altmode,
1499 u32 header, const u32 *data, int count)
1501 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
1503 mutex_lock(&port->lock);
1504 tcpm_queue_vdm(port, header, data, count - 1);
1505 mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
1506 mutex_unlock(&port->lock);
1511 static const struct typec_altmode_ops tcpm_altmode_ops = {
1512 .enter = tcpm_altmode_enter,
1513 .exit = tcpm_altmode_exit,
1514 .vdm = tcpm_altmode_vdm,
1518 * PD (data, control) command handling functions
1520 static inline enum tcpm_state ready_state(struct tcpm_port *port)
1522 if (port->pwr_role == TYPEC_SOURCE)
1528 static int tcpm_pd_send_control(struct tcpm_port *port,
1529 enum pd_ctrl_msg_type type);
1531 static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload,
1534 u32 p0 = le32_to_cpu(payload[0]);
1535 unsigned int type = usb_pd_ado_type(p0);
1538 tcpm_log(port, "Alert message received with no type");
1542 /* Just handling non-battery alerts for now */
1543 if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) {
1544 switch (port->state) {
1547 tcpm_set_state(port, GET_STATUS_SEND, 0);
1550 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1556 static void tcpm_pd_data_request(struct tcpm_port *port,
1557 const struct pd_message *msg)
1559 enum pd_data_msg_type type = pd_header_type_le(msg->header);
1560 unsigned int cnt = pd_header_cnt_le(msg->header);
1561 unsigned int rev = pd_header_rev_le(msg->header);
1565 case PD_DATA_SOURCE_CAP:
1566 if (port->pwr_role != TYPEC_SINK)
1569 for (i = 0; i < cnt; i++)
1570 port->source_caps[i] = le32_to_cpu(msg->payload[i]);
1572 port->nr_source_caps = cnt;
1574 tcpm_log_source_caps(port);
1576 tcpm_validate_caps(port, port->source_caps,
1577 port->nr_source_caps);
1580 * Adjust revision in subsequent message headers, as required,
1581 * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
1582 * support Rev 1.0 so just do nothing in that scenario.
1584 if (rev == PD_REV10)
1587 if (rev < PD_MAX_REV)
1588 port->negotiated_rev = rev;
1591 * This message may be received even if VBUS is not
1592 * present. This is quite unexpected; see USB PD
1593 * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2.
1594 * However, at the same time, we must be ready to
1595 * receive this message and respond to it 15ms after
1596 * receiving PS_RDY during power swap operations, no matter
1597 * if VBUS is available or not (USB PD specification,
1599 * So we need to accept the message either way,
1600 * but be prepared to keep waiting for VBUS after it was
1603 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
1605 case PD_DATA_REQUEST:
1606 if (port->pwr_role != TYPEC_SOURCE ||
1608 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1613 * Adjust revision in subsequent message headers, as required,
1614 * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
1615 * support Rev 1.0 so just reject in that scenario.
1617 if (rev == PD_REV10) {
1618 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1622 if (rev < PD_MAX_REV)
1623 port->negotiated_rev = rev;
1625 port->sink_request = le32_to_cpu(msg->payload[0]);
1626 tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0);
1628 case PD_DATA_SINK_CAP:
1629 /* We don't do anything with this at the moment... */
1630 for (i = 0; i < cnt; i++)
1631 port->sink_caps[i] = le32_to_cpu(msg->payload[i]);
1632 port->nr_sink_caps = cnt;
1634 case PD_DATA_VENDOR_DEF:
1635 tcpm_handle_vdm_request(port, msg->payload, cnt);
1638 if (port->state == SRC_READY || port->state == SNK_READY) {
1639 port->bist_request = le32_to_cpu(msg->payload[0]);
1640 tcpm_set_state(port, BIST_RX, 0);
1644 tcpm_handle_alert(port, msg->payload, cnt);
1646 case PD_DATA_BATT_STATUS:
1647 case PD_DATA_GET_COUNTRY_INFO:
1648 /* Currently unsupported */
1649 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1652 tcpm_log(port, "Unhandled data message type %#x", type);
1657 static void tcpm_pps_complete(struct tcpm_port *port, int result)
1659 if (port->pps_pending) {
1660 port->pps_status = result;
1661 port->pps_pending = false;
1662 complete(&port->pps_complete);
1666 static void tcpm_pd_ctrl_request(struct tcpm_port *port,
1667 const struct pd_message *msg)
1669 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
1670 enum tcpm_state next_state;
1673 case PD_CTRL_GOOD_CRC:
1676 case PD_CTRL_GET_SOURCE_CAP:
1677 switch (port->state) {
1680 tcpm_queue_message(port, PD_MSG_DATA_SOURCE_CAP);
1683 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1687 case PD_CTRL_GET_SINK_CAP:
1688 switch (port->state) {
1691 tcpm_queue_message(port, PD_MSG_DATA_SINK_CAP);
1694 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1698 case PD_CTRL_GOTO_MIN:
1700 case PD_CTRL_PS_RDY:
1701 switch (port->state) {
1702 case SNK_TRANSITION_SINK:
1703 if (port->vbus_present) {
1704 tcpm_set_current_limit(port,
1705 port->current_limit,
1706 port->supply_voltage);
1707 port->explicit_contract = true;
1708 tcpm_set_state(port, SNK_READY, 0);
1711 * Seen after power swap. Keep waiting for VBUS
1712 * in a transitional state.
1714 tcpm_set_state(port,
1715 SNK_TRANSITION_SINK_VBUS, 0);
1718 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
1719 tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0);
1721 case PR_SWAP_SNK_SRC_SINK_OFF:
1722 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0);
1724 case VCONN_SWAP_WAIT_FOR_VCONN:
1725 tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0);
1731 case PD_CTRL_REJECT:
1733 case PD_CTRL_NOT_SUPP:
1734 switch (port->state) {
1735 case SNK_NEGOTIATE_CAPABILITIES:
1736 /* USB PD specification, Figure 8-43 */
1737 if (port->explicit_contract)
1738 next_state = SNK_READY;
1740 next_state = SNK_WAIT_CAPABILITIES;
1741 tcpm_set_state(port, next_state, 0);
1743 case SNK_NEGOTIATE_PPS_CAPABILITIES:
1744 /* Revert data back from any requested PPS updates */
1745 port->pps_data.out_volt = port->supply_voltage;
1746 port->pps_data.op_curr = port->current_limit;
1747 port->pps_status = (type == PD_CTRL_WAIT ?
1748 -EAGAIN : -EOPNOTSUPP);
1749 tcpm_set_state(port, SNK_READY, 0);
1752 port->swap_status = (type == PD_CTRL_WAIT ?
1753 -EAGAIN : -EOPNOTSUPP);
1754 tcpm_set_state(port, DR_SWAP_CANCEL, 0);
1757 port->swap_status = (type == PD_CTRL_WAIT ?
1758 -EAGAIN : -EOPNOTSUPP);
1759 tcpm_set_state(port, PR_SWAP_CANCEL, 0);
1761 case VCONN_SWAP_SEND:
1762 port->swap_status = (type == PD_CTRL_WAIT ?
1763 -EAGAIN : -EOPNOTSUPP);
1764 tcpm_set_state(port, VCONN_SWAP_CANCEL, 0);
1770 case PD_CTRL_ACCEPT:
1771 switch (port->state) {
1772 case SNK_NEGOTIATE_CAPABILITIES:
1773 port->pps_data.active = false;
1774 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
1776 case SNK_NEGOTIATE_PPS_CAPABILITIES:
1777 port->pps_data.active = true;
1778 port->supply_voltage = port->pps_data.out_volt;
1779 port->current_limit = port->pps_data.op_curr;
1780 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
1782 case SOFT_RESET_SEND:
1783 port->message_id = 0;
1784 port->rx_msgid = -1;
1785 if (port->pwr_role == TYPEC_SOURCE)
1786 next_state = SRC_SEND_CAPABILITIES;
1788 next_state = SNK_WAIT_CAPABILITIES;
1789 tcpm_set_state(port, next_state, 0);
1792 tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0);
1795 tcpm_set_state(port, PR_SWAP_START, 0);
1797 case VCONN_SWAP_SEND:
1798 tcpm_set_state(port, VCONN_SWAP_START, 0);
1804 case PD_CTRL_SOFT_RESET:
1805 tcpm_set_state(port, SOFT_RESET, 0);
1807 case PD_CTRL_DR_SWAP:
1808 if (port->port_type != TYPEC_PORT_DRP) {
1809 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1814 * 6.3.9: If an alternate mode is active, a request to swap
1815 * alternate modes shall trigger a port reset.
1817 switch (port->state) {
1820 tcpm_set_state(port, DR_SWAP_ACCEPT, 0);
1823 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1827 case PD_CTRL_PR_SWAP:
1828 if (port->port_type != TYPEC_PORT_DRP) {
1829 tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
1832 switch (port->state) {
1835 tcpm_set_state(port, PR_SWAP_ACCEPT, 0);
1838 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1842 case PD_CTRL_VCONN_SWAP:
1843 switch (port->state) {
1846 tcpm_set_state(port, VCONN_SWAP_ACCEPT, 0);
1849 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
1853 case PD_CTRL_GET_SOURCE_CAP_EXT:
1854 case PD_CTRL_GET_STATUS:
1855 case PD_CTRL_FR_SWAP:
1856 case PD_CTRL_GET_PPS_STATUS:
1857 case PD_CTRL_GET_COUNTRY_CODES:
1858 /* Currently not supported */
1859 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1862 tcpm_log(port, "Unhandled ctrl message type %#x", type);
1867 static void tcpm_pd_ext_msg_request(struct tcpm_port *port,
1868 const struct pd_message *msg)
1870 enum pd_ext_msg_type type = pd_header_type_le(msg->header);
1871 unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header);
1873 if (!(msg->ext_msg.header & PD_EXT_HDR_CHUNKED)) {
1874 tcpm_log(port, "Unchunked extended messages unsupported");
1878 if (data_size > PD_EXT_MAX_CHUNK_DATA) {
1879 tcpm_log(port, "Chunk handling not yet supported");
1886 * If PPS related events raised then get PPS status to clear
1887 * (see USB PD 3.0 Spec, 6.5.2.4)
1889 if (msg->ext_msg.data[USB_PD_EXT_SDB_EVENT_FLAGS] &
1890 USB_PD_EXT_SDB_PPS_EVENTS)
1891 tcpm_set_state(port, GET_PPS_STATUS_SEND, 0);
1893 tcpm_set_state(port, ready_state(port), 0);
1895 case PD_EXT_PPS_STATUS:
1897 * For now the PPS status message is used to clear events
1900 tcpm_set_state(port, ready_state(port), 0);
1902 case PD_EXT_SOURCE_CAP_EXT:
1903 case PD_EXT_GET_BATT_CAP:
1904 case PD_EXT_GET_BATT_STATUS:
1905 case PD_EXT_BATT_CAP:
1906 case PD_EXT_GET_MANUFACTURER_INFO:
1907 case PD_EXT_MANUFACTURER_INFO:
1908 case PD_EXT_SECURITY_REQUEST:
1909 case PD_EXT_SECURITY_RESPONSE:
1910 case PD_EXT_FW_UPDATE_REQUEST:
1911 case PD_EXT_FW_UPDATE_RESPONSE:
1912 case PD_EXT_COUNTRY_INFO:
1913 case PD_EXT_COUNTRY_CODES:
1914 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
1917 tcpm_log(port, "Unhandled extended message type %#x", type);
1922 static void tcpm_pd_rx_handler(struct work_struct *work)
1924 struct pd_rx_event *event = container_of(work,
1925 struct pd_rx_event, work);
1926 const struct pd_message *msg = &event->msg;
1927 unsigned int cnt = pd_header_cnt_le(msg->header);
1928 struct tcpm_port *port = event->port;
1930 mutex_lock(&port->lock);
1932 tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header),
1935 if (port->attached) {
1936 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
1937 unsigned int msgid = pd_header_msgid_le(msg->header);
1940 * USB PD standard, 6.6.1.2:
1941 * "... if MessageID value in a received Message is the
1942 * same as the stored value, the receiver shall return a
1943 * GoodCRC Message with that MessageID value and drop
1944 * the Message (this is a retry of an already received
1945 * Message). Note: this shall not apply to the Soft_Reset
1946 * Message which always has a MessageID value of zero."
1948 if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET)
1950 port->rx_msgid = msgid;
1953 * If both ends believe to be DFP/host, we have a data role
1956 if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) ==
1957 (port->data_role == TYPEC_HOST)) {
1959 "Data role mismatch, initiating error recovery");
1960 tcpm_set_state(port, ERROR_RECOVERY, 0);
1962 if (msg->header & PD_HEADER_EXT_HDR)
1963 tcpm_pd_ext_msg_request(port, msg);
1965 tcpm_pd_data_request(port, msg);
1967 tcpm_pd_ctrl_request(port, msg);
1972 mutex_unlock(&port->lock);
1976 void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg)
1978 struct pd_rx_event *event;
1980 event = kzalloc(sizeof(*event), GFP_ATOMIC);
1984 INIT_WORK(&event->work, tcpm_pd_rx_handler);
1986 memcpy(&event->msg, msg, sizeof(*msg));
1987 queue_work(port->wq, &event->work);
1989 EXPORT_SYMBOL_GPL(tcpm_pd_receive);
1991 static int tcpm_pd_send_control(struct tcpm_port *port,
1992 enum pd_ctrl_msg_type type)
1994 struct pd_message msg;
1996 memset(&msg, 0, sizeof(msg));
1997 msg.header = PD_HEADER_LE(type, port->pwr_role,
1999 port->negotiated_rev,
2000 port->message_id, 0);
2002 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2006 * Send queued message without affecting state.
2007 * Return true if state machine should go back to sleep,
2010 static bool tcpm_send_queued_message(struct tcpm_port *port)
2012 enum pd_msg_request queued_message;
2015 queued_message = port->queued_message;
2016 port->queued_message = PD_MSG_NONE;
2018 switch (queued_message) {
2019 case PD_MSG_CTRL_WAIT:
2020 tcpm_pd_send_control(port, PD_CTRL_WAIT);
2022 case PD_MSG_CTRL_REJECT:
2023 tcpm_pd_send_control(port, PD_CTRL_REJECT);
2025 case PD_MSG_CTRL_NOT_SUPP:
2026 tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP);
2028 case PD_MSG_DATA_SINK_CAP:
2029 tcpm_pd_send_sink_caps(port);
2031 case PD_MSG_DATA_SOURCE_CAP:
2032 tcpm_pd_send_source_caps(port);
2037 } while (port->queued_message != PD_MSG_NONE);
2039 if (port->delayed_state != INVALID_STATE) {
2040 if (time_is_after_jiffies(port->delayed_runtime)) {
2041 mod_delayed_work(port->wq, &port->state_machine,
2042 port->delayed_runtime - jiffies);
2045 port->delayed_state = INVALID_STATE;
2050 static int tcpm_pd_check_request(struct tcpm_port *port)
2052 u32 pdo, rdo = port->sink_request;
2053 unsigned int max, op, pdo_max, index;
2054 enum pd_pdo_type type;
2056 index = rdo_index(rdo);
2057 if (!index || index > port->nr_src_pdo)
2060 pdo = port->src_pdo[index - 1];
2061 type = pdo_type(pdo);
2063 case PDO_TYPE_FIXED:
2065 max = rdo_max_current(rdo);
2066 op = rdo_op_current(rdo);
2067 pdo_max = pdo_max_current(pdo);
2071 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
2074 if (type == PDO_TYPE_FIXED)
2076 "Requested %u mV, %u mA for %u / %u mA",
2077 pdo_fixed_voltage(pdo), pdo_max, op, max);
2080 "Requested %u -> %u mV, %u mA for %u / %u mA",
2081 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
2085 max = rdo_max_power(rdo);
2086 op = rdo_op_power(rdo);
2087 pdo_max = pdo_max_power(pdo);
2091 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
2094 "Requested %u -> %u mV, %u mW for %u / %u mW",
2095 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
2102 port->op_vsafe5v = index == 1;
2107 #define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y))
2108 #define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y))
2110 static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo,
2113 unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0,
2114 max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0,
2118 port->pps_data.supported = false;
2119 port->usb_type = POWER_SUPPLY_USB_TYPE_PD;
2122 * Select the source PDO providing the most power which has a
2125 for (i = 0; i < port->nr_source_caps; i++) {
2126 u32 pdo = port->source_caps[i];
2127 enum pd_pdo_type type = pdo_type(pdo);
2130 case PDO_TYPE_FIXED:
2131 max_src_mv = pdo_fixed_voltage(pdo);
2132 min_src_mv = max_src_mv;
2136 max_src_mv = pdo_max_voltage(pdo);
2137 min_src_mv = pdo_min_voltage(pdo);
2140 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) {
2141 port->pps_data.supported = true;
2143 POWER_SUPPLY_USB_TYPE_PD_PPS;
2147 tcpm_log(port, "Invalid source PDO type, ignoring");
2152 case PDO_TYPE_FIXED:
2154 src_ma = pdo_max_current(pdo);
2155 src_mw = src_ma * min_src_mv / 1000;
2158 src_mw = pdo_max_power(pdo);
2163 tcpm_log(port, "Invalid source PDO type, ignoring");
2167 for (j = 0; j < port->nr_snk_pdo; j++) {
2168 pdo = port->snk_pdo[j];
2170 switch (pdo_type(pdo)) {
2171 case PDO_TYPE_FIXED:
2172 max_snk_mv = pdo_fixed_voltage(pdo);
2173 min_snk_mv = max_snk_mv;
2177 max_snk_mv = pdo_max_voltage(pdo);
2178 min_snk_mv = pdo_min_voltage(pdo);
2183 tcpm_log(port, "Invalid sink PDO type, ignoring");
2187 if (max_src_mv <= max_snk_mv &&
2188 min_src_mv >= min_snk_mv) {
2189 /* Prefer higher voltages if available */
2190 if ((src_mw == max_mw && min_src_mv > max_mv) ||
2195 max_mv = min_src_mv;
2205 #define min_pps_apdo_current(x, y) \
2206 min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y))
2208 static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port)
2210 unsigned int i, j, max_mw = 0, max_mv = 0;
2211 unsigned int min_src_mv, max_src_mv, src_ma, src_mw;
2212 unsigned int min_snk_mv, max_snk_mv;
2214 unsigned int src_pdo = 0, snk_pdo = 0;
2217 * Select the source PPS APDO providing the most power while staying
2218 * within the board's limits. We skip the first PDO as this is always
2221 for (i = 1; i < port->nr_source_caps; ++i) {
2222 pdo = port->source_caps[i];
2224 switch (pdo_type(pdo)) {
2226 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2227 tcpm_log(port, "Not PPS APDO (source), ignoring");
2231 min_src_mv = pdo_pps_apdo_min_voltage(pdo);
2232 max_src_mv = pdo_pps_apdo_max_voltage(pdo);
2233 src_ma = pdo_pps_apdo_max_current(pdo);
2234 src_mw = (src_ma * max_src_mv) / 1000;
2237 * Now search through the sink PDOs to find a matching
2238 * PPS APDO. Again skip the first sink PDO as this will
2241 for (j = 1; j < port->nr_snk_pdo; j++) {
2242 pdo = port->snk_pdo[j];
2244 switch (pdo_type(pdo)) {
2246 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2248 "Not PPS APDO (sink), ignoring");
2253 pdo_pps_apdo_min_voltage(pdo);
2255 pdo_pps_apdo_max_voltage(pdo);
2259 "Not APDO type (sink), ignoring");
2263 if (max_src_mv <= max_snk_mv &&
2264 min_src_mv >= min_snk_mv) {
2265 /* Prefer higher voltages if available */
2266 if ((src_mw == max_mw &&
2267 min_src_mv > max_mv) ||
2272 max_mv = max_src_mv;
2279 tcpm_log(port, "Not APDO type (source), ignoring");
2285 pdo = port->source_caps[src_pdo];
2287 port->pps_data.min_volt = pdo_pps_apdo_min_voltage(pdo);
2288 port->pps_data.max_volt = pdo_pps_apdo_max_voltage(pdo);
2289 port->pps_data.max_curr =
2290 min_pps_apdo_current(pdo, port->snk_pdo[snk_pdo]);
2291 port->pps_data.out_volt =
2292 min(pdo_pps_apdo_max_voltage(pdo), port->pps_data.out_volt);
2293 port->pps_data.op_curr =
2294 min(port->pps_data.max_curr, port->pps_data.op_curr);
2300 static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo)
2302 unsigned int mv, ma, mw, flags;
2303 unsigned int max_ma, max_mw;
2304 enum pd_pdo_type type;
2305 u32 pdo, matching_snk_pdo;
2306 int src_pdo_index = 0;
2307 int snk_pdo_index = 0;
2310 ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index);
2314 pdo = port->source_caps[src_pdo_index];
2315 matching_snk_pdo = port->snk_pdo[snk_pdo_index];
2316 type = pdo_type(pdo);
2319 case PDO_TYPE_FIXED:
2320 mv = pdo_fixed_voltage(pdo);
2324 mv = pdo_min_voltage(pdo);
2327 tcpm_log(port, "Invalid PDO selected!");
2331 /* Select maximum available current within the sink pdo's limit */
2332 if (type == PDO_TYPE_BATT) {
2333 mw = min_power(pdo, matching_snk_pdo);
2334 ma = 1000 * mw / mv;
2336 ma = min_current(pdo, matching_snk_pdo);
2337 mw = ma * mv / 1000;
2340 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
2342 /* Set mismatch bit if offered power is less than operating power */
2345 if (mw < port->operating_snk_mw) {
2346 flags |= RDO_CAP_MISMATCH;
2347 if (type == PDO_TYPE_BATT &&
2348 (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo)))
2349 max_mw = pdo_max_power(matching_snk_pdo);
2350 else if (pdo_max_current(matching_snk_pdo) >
2351 pdo_max_current(pdo))
2352 max_ma = pdo_max_current(matching_snk_pdo);
2355 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
2356 port->cc_req, port->cc1, port->cc2, port->vbus_source,
2357 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
2360 if (type == PDO_TYPE_BATT) {
2361 *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags);
2363 tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s",
2364 src_pdo_index, mv, mw,
2365 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
2367 *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags);
2369 tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s",
2370 src_pdo_index, mv, ma,
2371 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
2374 port->current_limit = ma;
2375 port->supply_voltage = mv;
2380 static int tcpm_pd_send_request(struct tcpm_port *port)
2382 struct pd_message msg;
2386 ret = tcpm_pd_build_request(port, &rdo);
2390 memset(&msg, 0, sizeof(msg));
2391 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
2394 port->negotiated_rev,
2395 port->message_id, 1);
2396 msg.payload[0] = cpu_to_le32(rdo);
2398 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2401 static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo)
2403 unsigned int out_mv, op_ma, op_mw, max_mv, max_ma, flags;
2404 enum pd_pdo_type type;
2405 unsigned int src_pdo_index;
2408 src_pdo_index = tcpm_pd_select_pps_apdo(port);
2412 pdo = port->source_caps[src_pdo_index];
2413 type = pdo_type(pdo);
2417 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
2418 tcpm_log(port, "Invalid APDO selected!");
2421 max_mv = port->pps_data.max_volt;
2422 max_ma = port->pps_data.max_curr;
2423 out_mv = port->pps_data.out_volt;
2424 op_ma = port->pps_data.op_curr;
2427 tcpm_log(port, "Invalid PDO selected!");
2431 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
2433 op_mw = (op_ma * out_mv) / 1000;
2434 if (op_mw < port->operating_snk_mw) {
2436 * Try raising current to meet power needs. If that's not enough
2437 * then try upping the voltage. If that's still not enough
2438 * then we've obviously chosen a PPS APDO which really isn't
2439 * suitable so abandon ship.
2441 op_ma = (port->operating_snk_mw * 1000) / out_mv;
2442 if ((port->operating_snk_mw * 1000) % out_mv)
2444 op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP);
2446 if (op_ma > max_ma) {
2448 out_mv = (port->operating_snk_mw * 1000) / op_ma;
2449 if ((port->operating_snk_mw * 1000) % op_ma)
2451 out_mv += RDO_PROG_VOLT_MV_STEP -
2452 (out_mv % RDO_PROG_VOLT_MV_STEP);
2454 if (out_mv > max_mv) {
2455 tcpm_log(port, "Invalid PPS APDO selected!");
2461 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
2462 port->cc_req, port->cc1, port->cc2, port->vbus_source,
2463 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
2466 *rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags);
2468 tcpm_log(port, "Requesting APDO %d: %u mV, %u mA",
2469 src_pdo_index, out_mv, op_ma);
2471 port->pps_data.op_curr = op_ma;
2472 port->pps_data.out_volt = out_mv;
2477 static int tcpm_pd_send_pps_request(struct tcpm_port *port)
2479 struct pd_message msg;
2483 ret = tcpm_pd_build_pps_request(port, &rdo);
2487 memset(&msg, 0, sizeof(msg));
2488 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
2491 port->negotiated_rev,
2492 port->message_id, 1);
2493 msg.payload[0] = cpu_to_le32(rdo);
2495 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2498 static int tcpm_set_vbus(struct tcpm_port *port, bool enable)
2502 if (enable && port->vbus_charge)
2505 tcpm_log(port, "vbus:=%d charge=%d", enable, port->vbus_charge);
2507 ret = port->tcpc->set_vbus(port->tcpc, enable, port->vbus_charge);
2511 port->vbus_source = enable;
2515 static int tcpm_set_charge(struct tcpm_port *port, bool charge)
2519 if (charge && port->vbus_source)
2522 if (charge != port->vbus_charge) {
2523 tcpm_log(port, "vbus=%d charge:=%d", port->vbus_source, charge);
2524 ret = port->tcpc->set_vbus(port->tcpc, port->vbus_source,
2529 port->vbus_charge = charge;
2533 static bool tcpm_start_drp_toggling(struct tcpm_port *port,
2534 enum typec_cc_status cc)
2538 if (port->tcpc->start_drp_toggling &&
2539 port->port_type == TYPEC_PORT_DRP) {
2540 tcpm_log_force(port, "Start DRP toggling");
2541 ret = port->tcpc->start_drp_toggling(port->tcpc, cc);
2549 static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc)
2551 tcpm_log(port, "cc:=%d", cc);
2553 port->tcpc->set_cc(port->tcpc, cc);
2556 static int tcpm_init_vbus(struct tcpm_port *port)
2560 ret = port->tcpc->set_vbus(port->tcpc, false, false);
2561 port->vbus_source = false;
2562 port->vbus_charge = false;
2566 static int tcpm_init_vconn(struct tcpm_port *port)
2570 ret = port->tcpc->set_vconn(port->tcpc, false);
2571 port->vconn_role = TYPEC_SINK;
2575 static void tcpm_typec_connect(struct tcpm_port *port)
2577 if (!port->connected) {
2578 /* Make sure we don't report stale identity information */
2579 memset(&port->partner_ident, 0, sizeof(port->partner_ident));
2580 port->partner_desc.usb_pd = port->pd_capable;
2581 if (tcpm_port_is_debug(port))
2582 port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG;
2583 else if (tcpm_port_is_audio(port))
2584 port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO;
2586 port->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
2587 port->partner = typec_register_partner(port->typec_port,
2588 &port->partner_desc);
2589 port->connected = true;
2593 static int tcpm_src_attach(struct tcpm_port *port)
2595 enum typec_cc_polarity polarity =
2596 port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2
2597 : TYPEC_POLARITY_CC1;
2603 ret = tcpm_set_polarity(port, polarity);
2607 ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
2611 ret = port->tcpc->set_pd_rx(port->tcpc, true);
2613 goto out_disable_mux;
2616 * USB Type-C specification, version 1.2,
2617 * chapter 4.5.2.2.8.1 (Attached.SRC Requirements)
2618 * Enable VCONN only if the non-RD port is set to RA.
2620 if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) ||
2621 (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) {
2622 ret = tcpm_set_vconn(port, true);
2624 goto out_disable_pd;
2627 ret = tcpm_set_vbus(port, true);
2629 goto out_disable_vconn;
2631 port->pd_capable = false;
2633 port->partner = NULL;
2635 port->attached = true;
2636 port->send_discover = true;
2641 tcpm_set_vconn(port, false);
2643 port->tcpc->set_pd_rx(port->tcpc, false);
2645 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
2646 TYPEC_ORIENTATION_NONE);
2650 static void tcpm_typec_disconnect(struct tcpm_port *port)
2652 if (port->connected) {
2653 typec_unregister_partner(port->partner);
2654 port->partner = NULL;
2655 port->connected = false;
2659 static void tcpm_unregister_altmodes(struct tcpm_port *port)
2661 struct pd_mode_data *modep = &port->mode_data;
2664 for (i = 0; i < modep->altmodes; i++) {
2665 typec_unregister_altmode(port->partner_altmode[i]);
2666 port->partner_altmode[i] = NULL;
2669 memset(modep, 0, sizeof(*modep));
2672 static void tcpm_reset_port(struct tcpm_port *port)
2674 tcpm_unregister_altmodes(port);
2675 tcpm_typec_disconnect(port);
2676 port->attached = false;
2677 port->pd_capable = false;
2678 port->pps_data.supported = false;
2681 * First Rx ID should be 0; set this to a sentinel of -1 so that
2682 * we can check tcpm_pd_rx_handler() if we had seen it before.
2684 port->rx_msgid = -1;
2686 port->tcpc->set_pd_rx(port->tcpc, false);
2687 tcpm_init_vbus(port); /* also disables charging */
2688 tcpm_init_vconn(port);
2689 tcpm_set_current_limit(port, 0, 0);
2690 tcpm_set_polarity(port, TYPEC_POLARITY_CC1);
2691 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
2692 TYPEC_ORIENTATION_NONE);
2693 tcpm_set_attached_state(port, false);
2694 port->try_src_count = 0;
2695 port->try_snk_count = 0;
2696 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
2698 power_supply_changed(port->psy);
2701 static void tcpm_detach(struct tcpm_port *port)
2703 if (!port->attached)
2706 if (tcpm_port_is_disconnected(port))
2707 port->hard_reset_count = 0;
2709 tcpm_reset_port(port);
2712 static void tcpm_src_detach(struct tcpm_port *port)
2717 static int tcpm_snk_attach(struct tcpm_port *port)
2724 ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ?
2725 TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1);
2729 ret = tcpm_set_roles(port, true, TYPEC_SINK, TYPEC_DEVICE);
2733 port->pd_capable = false;
2735 port->partner = NULL;
2737 port->attached = true;
2738 port->send_discover = true;
2743 static void tcpm_snk_detach(struct tcpm_port *port)
2748 static int tcpm_acc_attach(struct tcpm_port *port)
2755 ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
2759 port->partner = NULL;
2761 tcpm_typec_connect(port);
2763 port->attached = true;
2768 static void tcpm_acc_detach(struct tcpm_port *port)
2773 static inline enum tcpm_state hard_reset_state(struct tcpm_port *port)
2775 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)
2776 return HARD_RESET_SEND;
2777 if (port->pd_capable)
2778 return ERROR_RECOVERY;
2779 if (port->pwr_role == TYPEC_SOURCE)
2780 return SRC_UNATTACHED;
2781 if (port->state == SNK_WAIT_CAPABILITIES)
2783 return SNK_UNATTACHED;
2786 static inline enum tcpm_state unattached_state(struct tcpm_port *port)
2788 if (port->port_type == TYPEC_PORT_DRP) {
2789 if (port->pwr_role == TYPEC_SOURCE)
2790 return SRC_UNATTACHED;
2792 return SNK_UNATTACHED;
2793 } else if (port->port_type == TYPEC_PORT_SRC) {
2794 return SRC_UNATTACHED;
2797 return SNK_UNATTACHED;
2800 static void tcpm_check_send_discover(struct tcpm_port *port)
2802 if (port->data_role == TYPEC_HOST && port->send_discover &&
2804 tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0);
2805 port->send_discover = false;
2809 static void tcpm_swap_complete(struct tcpm_port *port, int result)
2811 if (port->swap_pending) {
2812 port->swap_status = result;
2813 port->swap_pending = false;
2814 port->non_pd_role_swap = false;
2815 complete(&port->swap_complete);
2819 static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc)
2822 case TYPEC_CC_RP_1_5:
2823 return TYPEC_PWR_MODE_1_5A;
2824 case TYPEC_CC_RP_3_0:
2825 return TYPEC_PWR_MODE_3_0A;
2826 case TYPEC_CC_RP_DEF:
2828 return TYPEC_PWR_MODE_USB;
2832 static void run_state_machine(struct tcpm_port *port)
2835 enum typec_pwr_opmode opmode;
2838 port->enter_state = port->state;
2839 switch (port->state) {
2843 case SRC_UNATTACHED:
2844 if (!port->non_pd_role_swap)
2845 tcpm_swap_complete(port, -ENOTCONN);
2846 tcpm_src_detach(port);
2847 if (tcpm_start_drp_toggling(port, tcpm_rp_cc(port))) {
2848 tcpm_set_state(port, DRP_TOGGLING, 0);
2851 tcpm_set_cc(port, tcpm_rp_cc(port));
2852 if (port->port_type == TYPEC_PORT_DRP)
2853 tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK);
2855 case SRC_ATTACH_WAIT:
2856 if (tcpm_port_is_debug(port))
2857 tcpm_set_state(port, DEBUG_ACC_ATTACHED,
2859 else if (tcpm_port_is_audio(port))
2860 tcpm_set_state(port, AUDIO_ACC_ATTACHED,
2862 else if (tcpm_port_is_source(port))
2863 tcpm_set_state(port,
2864 tcpm_try_snk(port) ? SNK_TRY
2870 port->try_snk_count++;
2873 * - Do not drive vconn or vbus
2874 * - Terminate CC pins (both) to Rd
2876 * - Wait for tDRPTry (PD_T_DRP_TRY).
2877 * Until then, ignore any state changes.
2879 tcpm_set_cc(port, TYPEC_CC_RD);
2880 tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY);
2883 if (tcpm_port_is_sink(port)) {
2884 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0);
2886 tcpm_set_state(port, SRC_TRYWAIT, 0);
2890 case SNK_TRY_WAIT_DEBOUNCE:
2891 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS,
2894 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
2895 if (port->vbus_present && tcpm_port_is_sink(port)) {
2896 tcpm_set_state(port, SNK_ATTACHED, 0);
2898 tcpm_set_state(port, SRC_TRYWAIT, 0);
2903 tcpm_set_cc(port, tcpm_rp_cc(port));
2904 if (port->max_wait == 0) {
2905 port->max_wait = jiffies +
2906 msecs_to_jiffies(PD_T_DRP_TRY);
2907 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
2910 if (time_is_after_jiffies(port->max_wait))
2911 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
2912 jiffies_to_msecs(port->max_wait -
2915 tcpm_set_state(port, SNK_UNATTACHED, 0);
2918 case SRC_TRYWAIT_DEBOUNCE:
2919 tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE);
2921 case SRC_TRYWAIT_UNATTACHED:
2922 tcpm_set_state(port, SNK_UNATTACHED, 0);
2926 ret = tcpm_src_attach(port);
2927 tcpm_set_state(port, SRC_UNATTACHED,
2928 ret < 0 ? 0 : PD_T_PS_SOURCE_ON);
2931 opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port));
2932 typec_set_pwr_opmode(port->typec_port, opmode);
2933 port->pwr_opmode = TYPEC_PWR_MODE_USB;
2934 port->caps_count = 0;
2935 port->negotiated_rev = PD_MAX_REV;
2936 port->message_id = 0;
2937 port->rx_msgid = -1;
2938 port->explicit_contract = false;
2939 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
2941 case SRC_SEND_CAPABILITIES:
2943 if (port->caps_count > PD_N_CAPS_COUNT) {
2944 tcpm_set_state(port, SRC_READY, 0);
2947 ret = tcpm_pd_send_source_caps(port);
2949 tcpm_set_state(port, SRC_SEND_CAPABILITIES,
2950 PD_T_SEND_SOURCE_CAP);
2953 * Per standard, we should clear the reset counter here.
2954 * However, that can result in state machine hang-ups.
2955 * Reset it only in READY state to improve stability.
2957 /* port->hard_reset_count = 0; */
2958 port->caps_count = 0;
2959 port->pd_capable = true;
2960 tcpm_set_state_cond(port, hard_reset_state(port),
2961 PD_T_SEND_SOURCE_CAP);
2964 case SRC_NEGOTIATE_CAPABILITIES:
2965 ret = tcpm_pd_check_request(port);
2967 tcpm_pd_send_control(port, PD_CTRL_REJECT);
2968 if (!port->explicit_contract) {
2969 tcpm_set_state(port,
2970 SRC_WAIT_NEW_CAPABILITIES, 0);
2972 tcpm_set_state(port, SRC_READY, 0);
2975 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
2976 tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
2977 PD_T_SRC_TRANSITION);
2980 case SRC_TRANSITION_SUPPLY:
2981 /* XXX: regulator_set_voltage(vbus, ...) */
2982 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
2983 port->explicit_contract = true;
2984 typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD);
2985 port->pwr_opmode = TYPEC_PWR_MODE_PD;
2986 tcpm_set_state_cond(port, SRC_READY, 0);
2990 port->hard_reset_count = 0;
2992 port->try_src_count = 0;
2994 tcpm_swap_complete(port, 0);
2995 tcpm_typec_connect(port);
2997 tcpm_check_send_discover(port);
3000 * Sending ping messages is not necessary if
3001 * - the source operates at vSafe5V
3003 * - The system is not operating in PD mode
3005 * - Both partners are connected using a Type-C connector
3007 * There is no actual need to send PD messages since the local
3008 * port type-c and the spec does not clearly say whether PD is
3009 * possible when type-c is connected to Type-A/B
3012 case SRC_WAIT_NEW_CAPABILITIES:
3013 /* Nothing to do... */
3017 case SNK_UNATTACHED:
3018 if (!port->non_pd_role_swap)
3019 tcpm_swap_complete(port, -ENOTCONN);
3020 tcpm_pps_complete(port, -ENOTCONN);
3021 tcpm_snk_detach(port);
3022 if (tcpm_start_drp_toggling(port, TYPEC_CC_RD)) {
3023 tcpm_set_state(port, DRP_TOGGLING, 0);
3026 tcpm_set_cc(port, TYPEC_CC_RD);
3027 if (port->port_type == TYPEC_PORT_DRP)
3028 tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC);
3030 case SNK_ATTACH_WAIT:
3031 if ((port->cc1 == TYPEC_CC_OPEN &&
3032 port->cc2 != TYPEC_CC_OPEN) ||
3033 (port->cc1 != TYPEC_CC_OPEN &&
3034 port->cc2 == TYPEC_CC_OPEN))
3035 tcpm_set_state(port, SNK_DEBOUNCED,
3037 else if (tcpm_port_is_disconnected(port))
3038 tcpm_set_state(port, SNK_UNATTACHED,
3042 if (tcpm_port_is_disconnected(port))
3043 tcpm_set_state(port, SNK_UNATTACHED,
3045 else if (port->vbus_present)
3046 tcpm_set_state(port,
3047 tcpm_try_src(port) ? SRC_TRY
3051 /* Wait for VBUS, but not forever */
3052 tcpm_set_state(port, PORT_RESET, PD_T_PS_SOURCE_ON);
3056 port->try_src_count++;
3057 tcpm_set_cc(port, tcpm_rp_cc(port));
3059 tcpm_set_state(port, SRC_TRY_WAIT, 0);
3062 if (port->max_wait == 0) {
3063 port->max_wait = jiffies +
3064 msecs_to_jiffies(PD_T_DRP_TRY);
3065 msecs = PD_T_DRP_TRY;
3067 if (time_is_after_jiffies(port->max_wait))
3068 msecs = jiffies_to_msecs(port->max_wait -
3073 tcpm_set_state(port, SNK_TRYWAIT, msecs);
3075 case SRC_TRY_DEBOUNCE:
3076 tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE);
3079 tcpm_set_cc(port, TYPEC_CC_RD);
3080 tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE);
3082 case SNK_TRYWAIT_VBUS:
3084 * TCPM stays in this state indefinitely until VBUS
3085 * is detected as long as Rp is not detected for
3086 * more than a time period of tPDDebounce.
3088 if (port->vbus_present && tcpm_port_is_sink(port)) {
3089 tcpm_set_state(port, SNK_ATTACHED, 0);
3092 if (!tcpm_port_is_sink(port))
3093 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
3095 case SNK_TRYWAIT_DEBOUNCE:
3096 tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE);
3099 ret = tcpm_snk_attach(port);
3101 tcpm_set_state(port, SNK_UNATTACHED, 0);
3103 tcpm_set_state(port, SNK_STARTUP, 0);
3106 opmode = tcpm_get_pwr_opmode(port->polarity ?
3107 port->cc2 : port->cc1);
3108 typec_set_pwr_opmode(port->typec_port, opmode);
3109 port->pwr_opmode = TYPEC_PWR_MODE_USB;
3110 port->negotiated_rev = PD_MAX_REV;
3111 port->message_id = 0;
3112 port->rx_msgid = -1;
3113 port->explicit_contract = false;
3114 tcpm_set_state(port, SNK_DISCOVERY, 0);
3117 if (port->vbus_present) {
3118 tcpm_set_current_limit(port,
3119 tcpm_get_current_limit(port),
3121 tcpm_set_charge(port, true);
3122 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3126 * For DRP, timeouts differ. Also, handling is supposed to be
3127 * different and much more complex (dead battery detection;
3128 * see USB power delivery specification, section 8.3.3.6.1.5.1).
3130 tcpm_set_state(port, hard_reset_state(port),
3131 port->port_type == TYPEC_PORT_DRP ?
3132 PD_T_DB_DETECT : PD_T_NO_RESPONSE);
3134 case SNK_DISCOVERY_DEBOUNCE:
3135 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE,
3138 case SNK_DISCOVERY_DEBOUNCE_DONE:
3139 if (!tcpm_port_is_disconnected(port) &&
3140 tcpm_port_is_sink(port) &&
3141 time_is_after_jiffies(port->delayed_runtime)) {
3142 tcpm_set_state(port, SNK_DISCOVERY,
3143 jiffies_to_msecs(port->delayed_runtime -
3147 tcpm_set_state(port, unattached_state(port), 0);
3149 case SNK_WAIT_CAPABILITIES:
3150 ret = port->tcpc->set_pd_rx(port->tcpc, true);
3152 tcpm_set_state(port, SNK_READY, 0);
3156 * If VBUS has never been low, and we time out waiting
3157 * for source cap, try a soft reset first, in case we
3158 * were already in a stable contract before this boot.
3159 * Do this only once.
3161 if (port->vbus_never_low) {
3162 port->vbus_never_low = false;
3163 tcpm_set_state(port, SOFT_RESET_SEND,
3164 PD_T_SINK_WAIT_CAP);
3166 tcpm_set_state(port, hard_reset_state(port),
3167 PD_T_SINK_WAIT_CAP);
3170 case SNK_NEGOTIATE_CAPABILITIES:
3171 port->pd_capable = true;
3172 port->hard_reset_count = 0;
3173 ret = tcpm_pd_send_request(port);
3175 /* Let the Source send capabilities again. */
3176 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3178 tcpm_set_state_cond(port, hard_reset_state(port),
3179 PD_T_SENDER_RESPONSE);
3182 case SNK_NEGOTIATE_PPS_CAPABILITIES:
3183 ret = tcpm_pd_send_pps_request(port);
3185 port->pps_status = ret;
3187 * If this was called due to updates to sink
3188 * capabilities, and pps is no longer valid, we should
3189 * safely fall back to a standard PDO.
3191 if (port->update_sink_caps)
3192 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
3194 tcpm_set_state(port, SNK_READY, 0);
3196 tcpm_set_state_cond(port, hard_reset_state(port),
3197 PD_T_SENDER_RESPONSE);
3200 case SNK_TRANSITION_SINK:
3201 case SNK_TRANSITION_SINK_VBUS:
3202 tcpm_set_state(port, hard_reset_state(port),
3203 PD_T_PS_TRANSITION);
3206 port->try_snk_count = 0;
3207 port->update_sink_caps = false;
3208 if (port->explicit_contract) {
3209 typec_set_pwr_opmode(port->typec_port,
3211 port->pwr_opmode = TYPEC_PWR_MODE_PD;
3214 tcpm_swap_complete(port, 0);
3215 tcpm_typec_connect(port);
3216 tcpm_check_send_discover(port);
3217 tcpm_pps_complete(port, port->pps_status);
3219 power_supply_changed(port->psy);
3223 /* Accessory states */
3224 case ACC_UNATTACHED:
3225 tcpm_acc_detach(port);
3226 tcpm_set_state(port, SRC_UNATTACHED, 0);
3228 case DEBUG_ACC_ATTACHED:
3229 case AUDIO_ACC_ATTACHED:
3230 ret = tcpm_acc_attach(port);
3232 tcpm_set_state(port, ACC_UNATTACHED, 0);
3234 case AUDIO_ACC_DEBOUNCE:
3235 tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE);
3238 /* Hard_Reset states */
3239 case HARD_RESET_SEND:
3240 tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL);
3241 tcpm_set_state(port, HARD_RESET_START, 0);
3243 case HARD_RESET_START:
3244 port->hard_reset_count++;
3245 port->tcpc->set_pd_rx(port->tcpc, false);
3246 tcpm_unregister_altmodes(port);
3247 port->send_discover = true;
3248 if (port->pwr_role == TYPEC_SOURCE)
3249 tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF,
3250 PD_T_PS_HARD_RESET);
3252 tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0);
3254 case SRC_HARD_RESET_VBUS_OFF:
3255 tcpm_set_vconn(port, true);
3256 tcpm_set_vbus(port, false);
3257 tcpm_set_roles(port, false, TYPEC_SOURCE, TYPEC_HOST);
3258 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
3260 case SRC_HARD_RESET_VBUS_ON:
3261 tcpm_set_vbus(port, true);
3262 port->tcpc->set_pd_rx(port->tcpc, true);
3263 tcpm_set_attached_state(port, true);
3264 tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON);
3266 case SNK_HARD_RESET_SINK_OFF:
3267 memset(&port->pps_data, 0, sizeof(port->pps_data));
3268 tcpm_set_vconn(port, false);
3269 tcpm_set_charge(port, false);
3270 tcpm_set_roles(port, false, TYPEC_SINK, TYPEC_DEVICE);
3272 * VBUS may or may not toggle, depending on the adapter.
3273 * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON
3274 * directly after timeout.
3276 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V);
3278 case SNK_HARD_RESET_WAIT_VBUS:
3279 /* Assume we're disconnected if VBUS doesn't come back. */
3280 tcpm_set_state(port, SNK_UNATTACHED,
3281 PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON);
3283 case SNK_HARD_RESET_SINK_ON:
3284 /* Note: There is no guarantee that VBUS is on in this state */
3287 * The specification suggests that dual mode ports in sink
3288 * mode should transition to state PE_SRC_Transition_to_default.
3289 * See USB power delivery specification chapter 8.3.3.6.1.3.
3290 * This would mean to to
3291 * - turn off VCONN, reset power supply
3292 * - request hardware reset
3294 * - Transition to state PE_Src_Startup
3295 * SNK only ports shall transition to state Snk_Startup
3296 * (see chapter 8.3.3.3.8).
3297 * Similar, dual-mode ports in source mode should transition
3298 * to PE_SNK_Transition_to_default.
3300 tcpm_set_attached_state(port, true);
3301 tcpm_set_state(port, SNK_STARTUP, 0);
3304 /* Soft_Reset states */
3306 port->message_id = 0;
3307 port->rx_msgid = -1;
3308 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3309 if (port->pwr_role == TYPEC_SOURCE)
3310 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
3312 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
3314 case SOFT_RESET_SEND:
3315 port->message_id = 0;
3316 port->rx_msgid = -1;
3317 if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET))
3318 tcpm_set_state_cond(port, hard_reset_state(port), 0);
3320 tcpm_set_state_cond(port, hard_reset_state(port),
3321 PD_T_SENDER_RESPONSE);
3324 /* DR_Swap states */
3326 tcpm_pd_send_control(port, PD_CTRL_DR_SWAP);
3327 tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT,
3328 PD_T_SENDER_RESPONSE);
3330 case DR_SWAP_ACCEPT:
3331 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3332 tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0);
3334 case DR_SWAP_SEND_TIMEOUT:
3335 tcpm_swap_complete(port, -ETIMEDOUT);
3336 tcpm_set_state(port, ready_state(port), 0);
3338 case DR_SWAP_CHANGE_DR:
3339 if (port->data_role == TYPEC_HOST) {
3340 tcpm_unregister_altmodes(port);
3341 tcpm_set_roles(port, true, port->pwr_role,
3344 tcpm_set_roles(port, true, port->pwr_role,
3346 port->send_discover = true;
3348 tcpm_set_state(port, ready_state(port), 0);
3351 /* PR_Swap states */
3352 case PR_SWAP_ACCEPT:
3353 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3354 tcpm_set_state(port, PR_SWAP_START, 0);
3357 tcpm_pd_send_control(port, PD_CTRL_PR_SWAP);
3358 tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT,
3359 PD_T_SENDER_RESPONSE);
3361 case PR_SWAP_SEND_TIMEOUT:
3362 tcpm_swap_complete(port, -ETIMEDOUT);
3363 tcpm_set_state(port, ready_state(port), 0);
3366 if (port->pwr_role == TYPEC_SOURCE)
3367 tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF,
3368 PD_T_SRC_TRANSITION);
3370 tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0);
3372 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3373 tcpm_set_vbus(port, false);
3374 port->explicit_contract = false;
3375 /* allow time for Vbus discharge, must be < tSrcSwapStdby */
3376 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF,
3379 case PR_SWAP_SRC_SNK_SOURCE_OFF:
3380 tcpm_set_cc(port, TYPEC_CC_RD);
3381 /* allow CC debounce */
3382 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED,
3385 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
3387 * USB-PD standard, 6.2.1.4, Port Power Role:
3388 * "During the Power Role Swap Sequence, for the initial Source
3389 * Port, the Port Power Role field shall be set to Sink in the
3390 * PS_RDY Message indicating that the initial Source’s power
3391 * supply is turned off"
3393 tcpm_set_pwr_role(port, TYPEC_SINK);
3394 if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
3395 tcpm_set_state(port, ERROR_RECOVERY, 0);
3398 tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON);
3400 case PR_SWAP_SRC_SNK_SINK_ON:
3401 tcpm_set_state(port, SNK_STARTUP, 0);
3403 case PR_SWAP_SNK_SRC_SINK_OFF:
3404 tcpm_set_charge(port, false);
3405 tcpm_set_state(port, hard_reset_state(port),
3406 PD_T_PS_SOURCE_OFF);
3408 case PR_SWAP_SNK_SRC_SOURCE_ON:
3409 tcpm_set_cc(port, tcpm_rp_cc(port));
3410 tcpm_set_vbus(port, true);
3412 * allow time VBUS ramp-up, must be < tNewSrc
3413 * Also, this window overlaps with CC debounce as well.
3414 * So, Wait for the max of two which is PD_T_NEWSRC
3416 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP,
3419 case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP:
3421 * USB PD standard, 6.2.1.4:
3422 * "Subsequent Messages initiated by the Policy Engine,
3423 * such as the PS_RDY Message sent to indicate that Vbus
3424 * is ready, will have the Port Power Role field set to
3427 tcpm_set_pwr_role(port, TYPEC_SOURCE);
3428 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
3429 tcpm_set_state(port, SRC_STARTUP, 0);
3432 case VCONN_SWAP_ACCEPT:
3433 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
3434 tcpm_set_state(port, VCONN_SWAP_START, 0);
3436 case VCONN_SWAP_SEND:
3437 tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP);
3438 tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT,
3439 PD_T_SENDER_RESPONSE);
3441 case VCONN_SWAP_SEND_TIMEOUT:
3442 tcpm_swap_complete(port, -ETIMEDOUT);
3443 tcpm_set_state(port, ready_state(port), 0);
3445 case VCONN_SWAP_START:
3446 if (port->vconn_role == TYPEC_SOURCE)
3447 tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0);
3449 tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0);
3451 case VCONN_SWAP_WAIT_FOR_VCONN:
3452 tcpm_set_state(port, hard_reset_state(port),
3453 PD_T_VCONN_SOURCE_ON);
3455 case VCONN_SWAP_TURN_ON_VCONN:
3456 tcpm_set_vconn(port, true);
3457 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
3458 tcpm_set_state(port, ready_state(port), 0);
3460 case VCONN_SWAP_TURN_OFF_VCONN:
3461 tcpm_set_vconn(port, false);
3462 tcpm_set_state(port, ready_state(port), 0);
3465 case DR_SWAP_CANCEL:
3466 case PR_SWAP_CANCEL:
3467 case VCONN_SWAP_CANCEL:
3468 tcpm_swap_complete(port, port->swap_status);
3469 if (port->pwr_role == TYPEC_SOURCE)
3470 tcpm_set_state(port, SRC_READY, 0);
3472 tcpm_set_state(port, SNK_READY, 0);
3476 switch (BDO_MODE_MASK(port->bist_request)) {
3477 case BDO_MODE_CARRIER2:
3478 tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
3483 /* Always switch to unattached state */
3484 tcpm_set_state(port, unattached_state(port), 0);
3486 case GET_STATUS_SEND:
3487 tcpm_pd_send_control(port, PD_CTRL_GET_STATUS);
3488 tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT,
3489 PD_T_SENDER_RESPONSE);
3491 case GET_STATUS_SEND_TIMEOUT:
3492 tcpm_set_state(port, ready_state(port), 0);
3494 case GET_PPS_STATUS_SEND:
3495 tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS);
3496 tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT,
3497 PD_T_SENDER_RESPONSE);
3499 case GET_PPS_STATUS_SEND_TIMEOUT:
3500 tcpm_set_state(port, ready_state(port), 0);
3502 case ERROR_RECOVERY:
3503 tcpm_swap_complete(port, -EPROTO);
3504 tcpm_pps_complete(port, -EPROTO);
3505 tcpm_set_state(port, PORT_RESET, 0);
3508 tcpm_reset_port(port);
3509 tcpm_set_cc(port, TYPEC_CC_OPEN);
3510 tcpm_set_state(port, PORT_RESET_WAIT_OFF,
3511 PD_T_ERROR_RECOVERY);
3513 case PORT_RESET_WAIT_OFF:
3514 tcpm_set_state(port,
3515 tcpm_default_state(port),
3516 port->vbus_present ? PD_T_PS_SOURCE_OFF : 0);
3519 WARN(1, "Unexpected port state %d\n", port->state);
3524 static void tcpm_state_machine_work(struct work_struct *work)
3526 struct tcpm_port *port = container_of(work, struct tcpm_port,
3527 state_machine.work);
3528 enum tcpm_state prev_state;
3530 mutex_lock(&port->lock);
3531 port->state_machine_running = true;
3533 if (port->queued_message && tcpm_send_queued_message(port))
3536 /* If we were queued due to a delayed state change, update it now */
3537 if (port->delayed_state) {
3538 tcpm_log(port, "state change %s -> %s [delayed %ld ms]",
3539 tcpm_states[port->state],
3540 tcpm_states[port->delayed_state], port->delay_ms);
3541 port->prev_state = port->state;
3542 port->state = port->delayed_state;
3543 port->delayed_state = INVALID_STATE;
3547 * Continue running as long as we have (non-delayed) state changes
3551 prev_state = port->state;
3552 run_state_machine(port);
3553 if (port->queued_message)
3554 tcpm_send_queued_message(port);
3555 } while (port->state != prev_state && !port->delayed_state);
3558 port->state_machine_running = false;
3559 mutex_unlock(&port->lock);
3562 static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
3563 enum typec_cc_status cc2)
3565 enum typec_cc_status old_cc1, old_cc2;
3566 enum tcpm_state new_state;
3568 old_cc1 = port->cc1;
3569 old_cc2 = port->cc2;
3573 tcpm_log_force(port,
3574 "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]",
3575 old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state],
3577 tcpm_port_is_disconnected(port) ? "disconnected"
3580 switch (port->state) {
3582 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
3583 tcpm_port_is_source(port))
3584 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3585 else if (tcpm_port_is_sink(port))
3586 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3588 case SRC_UNATTACHED:
3589 case ACC_UNATTACHED:
3590 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
3591 tcpm_port_is_source(port))
3592 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3594 case SRC_ATTACH_WAIT:
3595 if (tcpm_port_is_disconnected(port) ||
3596 tcpm_port_is_audio_detached(port))
3597 tcpm_set_state(port, SRC_UNATTACHED, 0);
3598 else if (cc1 != old_cc1 || cc2 != old_cc2)
3599 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
3602 case SRC_SEND_CAPABILITIES:
3604 if (tcpm_port_is_disconnected(port) ||
3605 !tcpm_port_is_source(port))
3606 tcpm_set_state(port, SRC_UNATTACHED, 0);
3608 case SNK_UNATTACHED:
3609 if (tcpm_port_is_sink(port))
3610 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3612 case SNK_ATTACH_WAIT:
3613 if ((port->cc1 == TYPEC_CC_OPEN &&
3614 port->cc2 != TYPEC_CC_OPEN) ||
3615 (port->cc1 != TYPEC_CC_OPEN &&
3616 port->cc2 == TYPEC_CC_OPEN))
3617 new_state = SNK_DEBOUNCED;
3618 else if (tcpm_port_is_disconnected(port))
3619 new_state = SNK_UNATTACHED;
3622 if (new_state != port->delayed_state)
3623 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
3626 if (tcpm_port_is_disconnected(port))
3627 new_state = SNK_UNATTACHED;
3628 else if (port->vbus_present)
3629 new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED;
3631 new_state = SNK_UNATTACHED;
3632 if (new_state != port->delayed_state)
3633 tcpm_set_state(port, SNK_DEBOUNCED, 0);
3636 if (tcpm_port_is_disconnected(port))
3637 tcpm_set_state(port, unattached_state(port), 0);
3638 else if (!port->pd_capable &&
3639 (cc1 != old_cc1 || cc2 != old_cc2))
3640 tcpm_set_current_limit(port,
3641 tcpm_get_current_limit(port),
3645 case AUDIO_ACC_ATTACHED:
3646 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
3647 tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0);
3649 case AUDIO_ACC_DEBOUNCE:
3650 if (tcpm_port_is_audio(port))
3651 tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0);
3654 case DEBUG_ACC_ATTACHED:
3655 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
3656 tcpm_set_state(port, ACC_UNATTACHED, 0);
3660 /* Do nothing, waiting for timeout */
3664 /* CC line is unstable, wait for debounce */
3665 if (tcpm_port_is_disconnected(port))
3666 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0);
3668 case SNK_DISCOVERY_DEBOUNCE:
3672 /* Hand over to state machine if needed */
3673 if (!port->vbus_present && tcpm_port_is_source(port))
3674 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
3676 case SRC_TRYWAIT_DEBOUNCE:
3677 if (port->vbus_present || !tcpm_port_is_source(port))
3678 tcpm_set_state(port, SRC_TRYWAIT, 0);
3680 case SNK_TRY_WAIT_DEBOUNCE:
3681 if (!tcpm_port_is_sink(port)) {
3683 tcpm_set_state(port, SRC_TRYWAIT, 0);
3687 if (tcpm_port_is_source(port))
3688 tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0);
3690 case SRC_TRY_DEBOUNCE:
3691 tcpm_set_state(port, SRC_TRY_WAIT, 0);
3693 case SNK_TRYWAIT_DEBOUNCE:
3694 if (tcpm_port_is_sink(port))
3695 tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0);
3697 case SNK_TRYWAIT_VBUS:
3698 if (!tcpm_port_is_sink(port))
3699 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
3702 /* Do nothing, waiting for tCCDebounce */
3704 case PR_SWAP_SNK_SRC_SINK_OFF:
3705 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3706 case PR_SWAP_SRC_SNK_SOURCE_OFF:
3707 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
3708 case PR_SWAP_SNK_SRC_SOURCE_ON:
3710 * CC state change is expected in PR_SWAP
3716 if (tcpm_port_is_disconnected(port))
3717 tcpm_set_state(port, unattached_state(port), 0);
3722 static void _tcpm_pd_vbus_on(struct tcpm_port *port)
3724 tcpm_log_force(port, "VBUS on");
3725 port->vbus_present = true;
3726 switch (port->state) {
3727 case SNK_TRANSITION_SINK_VBUS:
3728 port->explicit_contract = true;
3729 tcpm_set_state(port, SNK_READY, 0);
3732 tcpm_set_state(port, SNK_DISCOVERY, 0);
3736 tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY
3740 case SNK_HARD_RESET_WAIT_VBUS:
3741 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0);
3744 tcpm_set_state(port, SRC_STARTUP, 0);
3746 case SRC_HARD_RESET_VBUS_ON:
3747 tcpm_set_state(port, SRC_STARTUP, 0);
3751 /* Do nothing, waiting for timeout */
3754 /* Do nothing, Waiting for Rd to be detected */
3756 case SRC_TRYWAIT_DEBOUNCE:
3757 tcpm_set_state(port, SRC_TRYWAIT, 0);
3759 case SNK_TRY_WAIT_DEBOUNCE:
3760 /* Do nothing, waiting for PD_DEBOUNCE to do be done */
3763 /* Do nothing, waiting for tCCDebounce */
3765 case SNK_TRYWAIT_VBUS:
3766 if (tcpm_port_is_sink(port))
3767 tcpm_set_state(port, SNK_ATTACHED, 0);
3769 case SNK_TRYWAIT_DEBOUNCE:
3770 /* Do nothing, waiting for Rp */
3773 case SRC_TRY_DEBOUNCE:
3774 /* Do nothing, waiting for sink detection */
3781 static void _tcpm_pd_vbus_off(struct tcpm_port *port)
3783 tcpm_log_force(port, "VBUS off");
3784 port->vbus_present = false;
3785 port->vbus_never_low = false;
3786 switch (port->state) {
3787 case SNK_HARD_RESET_SINK_OFF:
3788 tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0);
3790 case SRC_HARD_RESET_VBUS_OFF:
3791 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, 0);
3793 case HARD_RESET_SEND:
3797 /* Do nothing, waiting for timeout */
3800 /* Hand over to state machine if needed */
3801 if (tcpm_port_is_source(port))
3802 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
3804 case SNK_TRY_WAIT_DEBOUNCE:
3805 /* Do nothing, waiting for PD_DEBOUNCE to do be done */
3808 case SNK_TRYWAIT_VBUS:
3809 case SNK_TRYWAIT_DEBOUNCE:
3811 case SNK_ATTACH_WAIT:
3812 tcpm_set_state(port, SNK_UNATTACHED, 0);
3815 case SNK_NEGOTIATE_CAPABILITIES:
3818 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
3819 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0);
3822 case PR_SWAP_SNK_SRC_SINK_OFF:
3823 /* Do nothing, expected */
3826 case PORT_RESET_WAIT_OFF:
3827 tcpm_set_state(port, tcpm_default_state(port), 0);
3830 case SRC_TRY_DEBOUNCE:
3831 /* Do nothing, waiting for sink detection */
3834 if (port->pwr_role == TYPEC_SINK &&
3836 tcpm_set_state(port, SNK_UNATTACHED, 0);
3841 static void _tcpm_pd_hard_reset(struct tcpm_port *port)
3843 tcpm_log_force(port, "Received hard reset");
3845 * If we keep receiving hard reset requests, executing the hard reset
3846 * must have failed. Revert to error recovery if that happens.
3848 tcpm_set_state(port,
3849 port->hard_reset_count < PD_N_HARD_RESET_COUNT ?
3850 HARD_RESET_START : ERROR_RECOVERY,
3854 static void tcpm_pd_event_handler(struct work_struct *work)
3856 struct tcpm_port *port = container_of(work, struct tcpm_port,
3860 mutex_lock(&port->lock);
3862 spin_lock(&port->pd_event_lock);
3863 while (port->pd_events) {
3864 events = port->pd_events;
3865 port->pd_events = 0;
3866 spin_unlock(&port->pd_event_lock);
3867 if (events & TCPM_RESET_EVENT)
3868 _tcpm_pd_hard_reset(port);
3869 if (events & TCPM_VBUS_EVENT) {
3872 vbus = port->tcpc->get_vbus(port->tcpc);
3874 _tcpm_pd_vbus_on(port);
3876 _tcpm_pd_vbus_off(port);
3878 if (events & TCPM_CC_EVENT) {
3879 enum typec_cc_status cc1, cc2;
3881 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
3882 _tcpm_cc_change(port, cc1, cc2);
3884 spin_lock(&port->pd_event_lock);
3886 spin_unlock(&port->pd_event_lock);
3887 mutex_unlock(&port->lock);
3890 void tcpm_cc_change(struct tcpm_port *port)
3892 spin_lock(&port->pd_event_lock);
3893 port->pd_events |= TCPM_CC_EVENT;
3894 spin_unlock(&port->pd_event_lock);
3895 queue_work(port->wq, &port->event_work);
3897 EXPORT_SYMBOL_GPL(tcpm_cc_change);
3899 void tcpm_vbus_change(struct tcpm_port *port)
3901 spin_lock(&port->pd_event_lock);
3902 port->pd_events |= TCPM_VBUS_EVENT;
3903 spin_unlock(&port->pd_event_lock);
3904 queue_work(port->wq, &port->event_work);
3906 EXPORT_SYMBOL_GPL(tcpm_vbus_change);
3908 void tcpm_pd_hard_reset(struct tcpm_port *port)
3910 spin_lock(&port->pd_event_lock);
3911 port->pd_events = TCPM_RESET_EVENT;
3912 spin_unlock(&port->pd_event_lock);
3913 queue_work(port->wq, &port->event_work);
3915 EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
3917 static int tcpm_dr_set(const struct typec_capability *cap,
3918 enum typec_data_role data)
3920 struct tcpm_port *port = typec_cap_to_tcpm(cap);
3923 mutex_lock(&port->swap_lock);
3924 mutex_lock(&port->lock);
3926 if (port->port_type != TYPEC_PORT_DRP) {
3930 if (port->state != SRC_READY && port->state != SNK_READY) {
3935 if (port->data_role == data) {
3942 * 6.3.9: If an alternate mode is active, a request to swap
3943 * alternate modes shall trigger a port reset.
3944 * Reject data role swap request in this case.
3947 if (!port->pd_capable) {
3949 * If the partner is not PD capable, reset the port to
3950 * trigger a role change. This can only work if a preferred
3951 * role is configured, and if it matches the requested role.
3953 if (port->try_role == TYPEC_NO_PREFERRED_ROLE ||
3954 port->try_role == port->pwr_role) {
3958 port->non_pd_role_swap = true;
3959 tcpm_set_state(port, PORT_RESET, 0);
3961 tcpm_set_state(port, DR_SWAP_SEND, 0);
3964 port->swap_status = 0;
3965 port->swap_pending = true;
3966 reinit_completion(&port->swap_complete);
3967 mutex_unlock(&port->lock);
3969 if (!wait_for_completion_timeout(&port->swap_complete,
3970 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
3973 ret = port->swap_status;
3975 port->non_pd_role_swap = false;
3979 mutex_unlock(&port->lock);
3981 mutex_unlock(&port->swap_lock);
3985 static int tcpm_pr_set(const struct typec_capability *cap,
3986 enum typec_role role)
3988 struct tcpm_port *port = typec_cap_to_tcpm(cap);
3991 mutex_lock(&port->swap_lock);
3992 mutex_lock(&port->lock);
3994 if (port->port_type != TYPEC_PORT_DRP) {
3998 if (port->state != SRC_READY && port->state != SNK_READY) {
4003 if (role == port->pwr_role) {
4008 port->swap_status = 0;
4009 port->swap_pending = true;
4010 reinit_completion(&port->swap_complete);
4011 tcpm_set_state(port, PR_SWAP_SEND, 0);
4012 mutex_unlock(&port->lock);
4014 if (!wait_for_completion_timeout(&port->swap_complete,
4015 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4018 ret = port->swap_status;
4023 mutex_unlock(&port->lock);
4025 mutex_unlock(&port->swap_lock);
4029 static int tcpm_vconn_set(const struct typec_capability *cap,
4030 enum typec_role role)
4032 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4035 mutex_lock(&port->swap_lock);
4036 mutex_lock(&port->lock);
4038 if (port->state != SRC_READY && port->state != SNK_READY) {
4043 if (role == port->vconn_role) {
4048 port->swap_status = 0;
4049 port->swap_pending = true;
4050 reinit_completion(&port->swap_complete);
4051 tcpm_set_state(port, VCONN_SWAP_SEND, 0);
4052 mutex_unlock(&port->lock);
4054 if (!wait_for_completion_timeout(&port->swap_complete,
4055 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
4058 ret = port->swap_status;
4063 mutex_unlock(&port->lock);
4065 mutex_unlock(&port->swap_lock);
4069 static int tcpm_try_role(const struct typec_capability *cap, int role)
4071 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4072 struct tcpc_dev *tcpc = port->tcpc;
4075 mutex_lock(&port->lock);
4077 ret = tcpc->try_role(tcpc, role);
4078 if (!ret && !tcpc->config->try_role_hw)
4079 port->try_role = role;
4080 port->try_src_count = 0;
4081 port->try_snk_count = 0;
4082 mutex_unlock(&port->lock);
4087 static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr)
4089 unsigned int target_mw;
4092 mutex_lock(&port->swap_lock);
4093 mutex_lock(&port->lock);
4095 if (!port->pps_data.active) {
4100 if (port->state != SNK_READY) {
4105 if (op_curr > port->pps_data.max_curr) {
4110 target_mw = (op_curr * port->pps_data.out_volt) / 1000;
4111 if (target_mw < port->operating_snk_mw) {
4116 reinit_completion(&port->pps_complete);
4117 port->pps_data.op_curr = op_curr;
4118 port->pps_status = 0;
4119 port->pps_pending = true;
4120 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4121 mutex_unlock(&port->lock);
4123 if (!wait_for_completion_timeout(&port->pps_complete,
4124 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4127 ret = port->pps_status;
4132 mutex_unlock(&port->lock);
4134 mutex_unlock(&port->swap_lock);
4139 static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt)
4141 unsigned int target_mw;
4144 mutex_lock(&port->swap_lock);
4145 mutex_lock(&port->lock);
4147 if (!port->pps_data.active) {
4152 if (port->state != SNK_READY) {
4157 if (out_volt < port->pps_data.min_volt ||
4158 out_volt > port->pps_data.max_volt) {
4163 target_mw = (port->pps_data.op_curr * out_volt) / 1000;
4164 if (target_mw < port->operating_snk_mw) {
4169 reinit_completion(&port->pps_complete);
4170 port->pps_data.out_volt = out_volt;
4171 port->pps_status = 0;
4172 port->pps_pending = true;
4173 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4174 mutex_unlock(&port->lock);
4176 if (!wait_for_completion_timeout(&port->pps_complete,
4177 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4180 ret = port->pps_status;
4185 mutex_unlock(&port->lock);
4187 mutex_unlock(&port->swap_lock);
4192 static int tcpm_pps_activate(struct tcpm_port *port, bool activate)
4196 mutex_lock(&port->swap_lock);
4197 mutex_lock(&port->lock);
4199 if (!port->pps_data.supported) {
4204 /* Trying to deactivate PPS when already deactivated so just bail */
4205 if (!port->pps_data.active && !activate)
4208 if (port->state != SNK_READY) {
4213 reinit_completion(&port->pps_complete);
4214 port->pps_status = 0;
4215 port->pps_pending = true;
4217 /* Trigger PPS request or move back to standard PDO contract */
4219 port->pps_data.out_volt = port->supply_voltage;
4220 port->pps_data.op_curr = port->current_limit;
4221 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4223 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
4225 mutex_unlock(&port->lock);
4227 if (!wait_for_completion_timeout(&port->pps_complete,
4228 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
4231 ret = port->pps_status;
4236 mutex_unlock(&port->lock);
4238 mutex_unlock(&port->swap_lock);
4243 static void tcpm_init(struct tcpm_port *port)
4245 enum typec_cc_status cc1, cc2;
4247 port->tcpc->init(port->tcpc);
4249 tcpm_reset_port(port);
4253 * Should possibly wait for VBUS to settle if it was enabled locally
4254 * since tcpm_reset_port() will disable VBUS.
4256 port->vbus_present = port->tcpc->get_vbus(port->tcpc);
4257 if (port->vbus_present)
4258 port->vbus_never_low = true;
4260 tcpm_set_state(port, tcpm_default_state(port), 0);
4262 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
4263 _tcpm_cc_change(port, cc1, cc2);
4266 * Some adapters need a clean slate at startup, and won't recover
4267 * otherwise. So do not try to be fancy and force a clean disconnect.
4269 tcpm_set_state(port, PORT_RESET, 0);
4272 static int tcpm_port_type_set(const struct typec_capability *cap,
4273 enum typec_port_type type)
4275 struct tcpm_port *port = typec_cap_to_tcpm(cap);
4277 mutex_lock(&port->lock);
4278 if (type == port->port_type)
4281 port->port_type = type;
4283 if (!port->connected) {
4284 tcpm_set_state(port, PORT_RESET, 0);
4285 } else if (type == TYPEC_PORT_SNK) {
4286 if (!(port->pwr_role == TYPEC_SINK &&
4287 port->data_role == TYPEC_DEVICE))
4288 tcpm_set_state(port, PORT_RESET, 0);
4289 } else if (type == TYPEC_PORT_SRC) {
4290 if (!(port->pwr_role == TYPEC_SOURCE &&
4291 port->data_role == TYPEC_HOST))
4292 tcpm_set_state(port, PORT_RESET, 0);
4296 mutex_unlock(&port->lock);
4300 void tcpm_tcpc_reset(struct tcpm_port *port)
4302 mutex_lock(&port->lock);
4303 /* XXX: Maintain PD connection if possible? */
4305 mutex_unlock(&port->lock);
4307 EXPORT_SYMBOL_GPL(tcpm_tcpc_reset);
4309 static int tcpm_copy_pdos(u32 *dest_pdo, const u32 *src_pdo,
4310 unsigned int nr_pdo)
4314 if (nr_pdo > PDO_MAX_OBJECTS)
4315 nr_pdo = PDO_MAX_OBJECTS;
4317 for (i = 0; i < nr_pdo; i++)
4318 dest_pdo[i] = src_pdo[i];
4323 static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo,
4324 unsigned int nr_vdo)
4328 if (nr_vdo > VDO_MAX_OBJECTS)
4329 nr_vdo = VDO_MAX_OBJECTS;
4331 for (i = 0; i < nr_vdo; i++)
4332 dest_vdo[i] = src_vdo[i];
4337 static int tcpm_fw_get_caps(struct tcpm_port *port,
4338 struct fwnode_handle *fwnode)
4340 const char *cap_str;
4347 /* USB data support is optional */
4348 ret = fwnode_property_read_string(fwnode, "data-role", &cap_str);
4350 port->typec_caps.data = typec_find_port_data_role(cap_str);
4351 if (port->typec_caps.data < 0)
4355 ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
4359 port->typec_caps.type = typec_find_port_power_role(cap_str);
4360 if (port->typec_caps.type < 0)
4362 port->port_type = port->typec_caps.type;
4364 if (port->port_type == TYPEC_PORT_SNK)
4367 /* Get source pdos */
4368 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
4373 port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
4374 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
4375 port->src_pdo, port->nr_src_pdo);
4376 if ((ret < 0) || tcpm_validate_caps(port, port->src_pdo,
4380 if (port->port_type == TYPEC_PORT_SRC)
4383 /* Get the preferred power role for DRP */
4384 ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str);
4388 port->typec_caps.prefer_role = typec_find_power_role(cap_str);
4389 if (port->typec_caps.prefer_role < 0)
4393 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
4398 port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS);
4399 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
4400 port->snk_pdo, port->nr_snk_pdo);
4401 if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo,
4405 if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0)
4407 port->operating_snk_mw = mw / 1000;
4412 int tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo,
4413 unsigned int nr_pdo)
4415 if (tcpm_validate_caps(port, pdo, nr_pdo))
4418 mutex_lock(&port->lock);
4419 port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, pdo, nr_pdo);
4420 switch (port->state) {
4421 case SRC_UNATTACHED:
4422 case SRC_ATTACH_WAIT:
4424 tcpm_set_cc(port, tcpm_rp_cc(port));
4426 case SRC_SEND_CAPABILITIES:
4427 case SRC_NEGOTIATE_CAPABILITIES:
4429 case SRC_WAIT_NEW_CAPABILITIES:
4430 tcpm_set_cc(port, tcpm_rp_cc(port));
4431 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
4436 mutex_unlock(&port->lock);
4439 EXPORT_SYMBOL_GPL(tcpm_update_source_capabilities);
4441 int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo,
4442 unsigned int nr_pdo,
4443 unsigned int operating_snk_mw)
4445 if (tcpm_validate_caps(port, pdo, nr_pdo))
4448 mutex_lock(&port->lock);
4449 port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, pdo, nr_pdo);
4450 port->operating_snk_mw = operating_snk_mw;
4451 port->update_sink_caps = true;
4453 switch (port->state) {
4454 case SNK_NEGOTIATE_CAPABILITIES:
4455 case SNK_NEGOTIATE_PPS_CAPABILITIES:
4457 case SNK_TRANSITION_SINK:
4458 case SNK_TRANSITION_SINK_VBUS:
4459 if (port->pps_data.active)
4460 tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
4462 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
4467 mutex_unlock(&port->lock);
4470 EXPORT_SYMBOL_GPL(tcpm_update_sink_capabilities);
4472 /* Power Supply access to expose source power information */
4473 enum tcpm_psy_online_states {
4474 TCPM_PSY_OFFLINE = 0,
4475 TCPM_PSY_FIXED_ONLINE,
4476 TCPM_PSY_PROG_ONLINE,
4479 static enum power_supply_property tcpm_psy_props[] = {
4480 POWER_SUPPLY_PROP_USB_TYPE,
4481 POWER_SUPPLY_PROP_ONLINE,
4482 POWER_SUPPLY_PROP_VOLTAGE_MIN,
4483 POWER_SUPPLY_PROP_VOLTAGE_MAX,
4484 POWER_SUPPLY_PROP_VOLTAGE_NOW,
4485 POWER_SUPPLY_PROP_CURRENT_MAX,
4486 POWER_SUPPLY_PROP_CURRENT_NOW,
4489 static int tcpm_psy_get_online(struct tcpm_port *port,
4490 union power_supply_propval *val)
4492 if (port->vbus_charge) {
4493 if (port->pps_data.active)
4494 val->intval = TCPM_PSY_PROG_ONLINE;
4496 val->intval = TCPM_PSY_FIXED_ONLINE;
4498 val->intval = TCPM_PSY_OFFLINE;
4504 static int tcpm_psy_get_voltage_min(struct tcpm_port *port,
4505 union power_supply_propval *val)
4507 if (port->pps_data.active)
4508 val->intval = port->pps_data.min_volt * 1000;
4510 val->intval = port->supply_voltage * 1000;
4515 static int tcpm_psy_get_voltage_max(struct tcpm_port *port,
4516 union power_supply_propval *val)
4518 if (port->pps_data.active)
4519 val->intval = port->pps_data.max_volt * 1000;
4521 val->intval = port->supply_voltage * 1000;
4526 static int tcpm_psy_get_voltage_now(struct tcpm_port *port,
4527 union power_supply_propval *val)
4529 val->intval = port->supply_voltage * 1000;
4534 static int tcpm_psy_get_current_max(struct tcpm_port *port,
4535 union power_supply_propval *val)
4537 if (port->pps_data.active)
4538 val->intval = port->pps_data.max_curr * 1000;
4540 val->intval = port->current_limit * 1000;
4545 static int tcpm_psy_get_current_now(struct tcpm_port *port,
4546 union power_supply_propval *val)
4548 val->intval = port->current_limit * 1000;
4553 static int tcpm_psy_get_prop(struct power_supply *psy,
4554 enum power_supply_property psp,
4555 union power_supply_propval *val)
4557 struct tcpm_port *port = power_supply_get_drvdata(psy);
4561 case POWER_SUPPLY_PROP_USB_TYPE:
4562 val->intval = port->usb_type;
4564 case POWER_SUPPLY_PROP_ONLINE:
4565 ret = tcpm_psy_get_online(port, val);
4567 case POWER_SUPPLY_PROP_VOLTAGE_MIN:
4568 ret = tcpm_psy_get_voltage_min(port, val);
4570 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
4571 ret = tcpm_psy_get_voltage_max(port, val);
4573 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4574 ret = tcpm_psy_get_voltage_now(port, val);
4576 case POWER_SUPPLY_PROP_CURRENT_MAX:
4577 ret = tcpm_psy_get_current_max(port, val);
4579 case POWER_SUPPLY_PROP_CURRENT_NOW:
4580 ret = tcpm_psy_get_current_now(port, val);
4590 static int tcpm_psy_set_online(struct tcpm_port *port,
4591 const union power_supply_propval *val)
4595 switch (val->intval) {
4596 case TCPM_PSY_FIXED_ONLINE:
4597 ret = tcpm_pps_activate(port, false);
4599 case TCPM_PSY_PROG_ONLINE:
4600 ret = tcpm_pps_activate(port, true);
4610 static int tcpm_psy_set_prop(struct power_supply *psy,
4611 enum power_supply_property psp,
4612 const union power_supply_propval *val)
4614 struct tcpm_port *port = power_supply_get_drvdata(psy);
4618 case POWER_SUPPLY_PROP_ONLINE:
4619 ret = tcpm_psy_set_online(port, val);
4621 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4622 if (val->intval < port->pps_data.min_volt * 1000 ||
4623 val->intval > port->pps_data.max_volt * 1000)
4626 ret = tcpm_pps_set_out_volt(port, val->intval / 1000);
4628 case POWER_SUPPLY_PROP_CURRENT_NOW:
4629 if (val->intval > port->pps_data.max_curr * 1000)
4632 ret = tcpm_pps_set_op_curr(port, val->intval / 1000);
4642 static int tcpm_psy_prop_writeable(struct power_supply *psy,
4643 enum power_supply_property psp)
4646 case POWER_SUPPLY_PROP_ONLINE:
4647 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
4648 case POWER_SUPPLY_PROP_CURRENT_NOW:
4655 static enum power_supply_usb_type tcpm_psy_usb_types[] = {
4656 POWER_SUPPLY_USB_TYPE_C,
4657 POWER_SUPPLY_USB_TYPE_PD,
4658 POWER_SUPPLY_USB_TYPE_PD_PPS,
4661 static const char *tcpm_psy_name_prefix = "tcpm-source-psy-";
4663 static int devm_tcpm_psy_register(struct tcpm_port *port)
4665 struct power_supply_config psy_cfg = {};
4666 const char *port_dev_name = dev_name(port->dev);
4667 size_t psy_name_len = strlen(tcpm_psy_name_prefix) +
4668 strlen(port_dev_name) + 1;
4671 psy_cfg.drv_data = port;
4672 psy_cfg.fwnode = dev_fwnode(port->dev);
4673 psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL);
4677 snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix,
4679 port->psy_desc.name = psy_name;
4680 port->psy_desc.type = POWER_SUPPLY_TYPE_USB,
4681 port->psy_desc.usb_types = tcpm_psy_usb_types;
4682 port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types);
4683 port->psy_desc.properties = tcpm_psy_props,
4684 port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props),
4685 port->psy_desc.get_property = tcpm_psy_get_prop,
4686 port->psy_desc.set_property = tcpm_psy_set_prop,
4687 port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable,
4689 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
4691 port->psy = devm_power_supply_register(port->dev, &port->psy_desc,
4694 return PTR_ERR_OR_ZERO(port->psy);
4697 static int tcpm_copy_caps(struct tcpm_port *port,
4698 const struct tcpc_config *tcfg)
4700 if (tcpm_validate_caps(port, tcfg->src_pdo, tcfg->nr_src_pdo) ||
4701 tcpm_validate_caps(port, tcfg->snk_pdo, tcfg->nr_snk_pdo))
4704 port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcfg->src_pdo,
4706 port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcfg->snk_pdo,
4709 port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcfg->snk_vdo,
4712 port->operating_snk_mw = tcfg->operating_snk_mw;
4714 port->typec_caps.prefer_role = tcfg->default_role;
4715 port->typec_caps.type = tcfg->type;
4716 port->typec_caps.data = tcfg->data;
4721 struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
4723 struct tcpm_port *port;
4726 if (!dev || !tcpc ||
4727 !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc ||
4728 !tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus ||
4729 !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit)
4730 return ERR_PTR(-EINVAL);
4732 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
4734 return ERR_PTR(-ENOMEM);
4739 mutex_init(&port->lock);
4740 mutex_init(&port->swap_lock);
4742 port->wq = create_singlethread_workqueue(dev_name(dev));
4744 return ERR_PTR(-ENOMEM);
4745 INIT_DELAYED_WORK(&port->state_machine, tcpm_state_machine_work);
4746 INIT_DELAYED_WORK(&port->vdm_state_machine, vdm_state_machine_work);
4747 INIT_WORK(&port->event_work, tcpm_pd_event_handler);
4749 spin_lock_init(&port->pd_event_lock);
4751 init_completion(&port->tx_complete);
4752 init_completion(&port->swap_complete);
4753 init_completion(&port->pps_complete);
4754 tcpm_debugfs_init(port);
4756 err = tcpm_fw_get_caps(port, tcpc->fwnode);
4757 if ((err < 0) && tcpc->config)
4758 err = tcpm_copy_caps(port, tcpc->config);
4760 goto out_destroy_wq;
4762 if (!tcpc->config || !tcpc->config->try_role_hw)
4763 port->try_role = port->typec_caps.prefer_role;
4765 port->try_role = TYPEC_NO_PREFERRED_ROLE;
4767 port->typec_caps.fwnode = tcpc->fwnode;
4768 port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */
4769 port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */
4770 port->typec_caps.dr_set = tcpm_dr_set;
4771 port->typec_caps.pr_set = tcpm_pr_set;
4772 port->typec_caps.vconn_set = tcpm_vconn_set;
4773 port->typec_caps.try_role = tcpm_try_role;
4774 port->typec_caps.port_type_set = tcpm_port_type_set;
4776 port->partner_desc.identity = &port->partner_ident;
4777 port->port_type = port->typec_caps.type;
4779 port->role_sw = usb_role_switch_get(port->dev);
4780 if (IS_ERR(port->role_sw)) {
4781 err = PTR_ERR(port->role_sw);
4782 goto out_destroy_wq;
4785 err = devm_tcpm_psy_register(port);
4787 goto out_destroy_wq;
4789 port->typec_port = typec_register_port(port->dev, &port->typec_caps);
4790 if (IS_ERR(port->typec_port)) {
4791 err = PTR_ERR(port->typec_port);
4792 goto out_destroy_wq;
4795 if (tcpc->config && tcpc->config->alt_modes) {
4796 const struct typec_altmode_desc *paltmode = tcpc->config->alt_modes;
4799 while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) {
4800 struct typec_altmode *alt;
4802 alt = typec_port_register_altmode(port->typec_port,
4806 "%s: failed to register port alternate mode 0x%x",
4807 dev_name(dev), paltmode->svid);
4810 typec_altmode_set_drvdata(alt, port);
4811 alt->ops = &tcpm_altmode_ops;
4812 port->port_altmode[i] = alt;
4818 mutex_lock(&port->lock);
4820 mutex_unlock(&port->lock);
4822 tcpm_log(port, "%s: registered", dev_name(dev));
4826 usb_role_switch_put(port->role_sw);
4827 destroy_workqueue(port->wq);
4828 return ERR_PTR(err);
4830 EXPORT_SYMBOL_GPL(tcpm_register_port);
4832 void tcpm_unregister_port(struct tcpm_port *port)
4836 tcpm_reset_port(port);
4837 for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++)
4838 typec_unregister_altmode(port->port_altmode[i]);
4839 typec_unregister_port(port->typec_port);
4840 usb_role_switch_put(port->role_sw);
4841 tcpm_debugfs_exit(port);
4842 destroy_workqueue(port->wq);
4844 EXPORT_SYMBOL_GPL(tcpm_unregister_port);
4846 MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>");
4847 MODULE_DESCRIPTION("USB Type-C Port Manager");
4848 MODULE_LICENSE("GPL");