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/hrtimer.h>
12 #include <linux/jiffies.h>
13 #include <linux/kernel.h>
14 #include <linux/kthread.h>
15 #include <linux/module.h>
16 #include <linux/mutex.h>
17 #include <linux/power_supply.h>
18 #include <linux/proc_fs.h>
19 #include <linux/property.h>
20 #include <linux/sched/clock.h>
21 #include <linux/seq_file.h>
22 #include <linux/slab.h>
23 #include <linux/spinlock.h>
24 #include <linux/usb.h>
25 #include <linux/usb/pd.h>
26 #include <linux/usb/pd_ado.h>
27 #include <linux/usb/pd_bdo.h>
28 #include <linux/usb/pd_ext_sdb.h>
29 #include <linux/usb/pd_vdo.h>
30 #include <linux/usb/role.h>
31 #include <linux/usb/tcpm.h>
32 #include <linux/usb/typec_altmode.h>
34 #include <uapi/linux/sched/types.h>
36 #define FOREACH_STATE(S) \
39 S(CHECK_CONTAMINANT), \
44 S(SRC_SEND_CAPABILITIES), \
45 S(SRC_SEND_CAPABILITIES_TIMEOUT), \
46 S(SRC_NEGOTIATE_CAPABILITIES), \
47 S(SRC_TRANSITION_SUPPLY), \
49 S(SRC_WAIT_NEW_CAPABILITIES), \
57 S(SNK_DISCOVERY_DEBOUNCE), \
58 S(SNK_DISCOVERY_DEBOUNCE_DONE), \
59 S(SNK_WAIT_CAPABILITIES), \
60 S(SNK_NEGOTIATE_CAPABILITIES), \
61 S(SNK_NEGOTIATE_PPS_CAPABILITIES), \
62 S(SNK_TRANSITION_SINK), \
63 S(SNK_TRANSITION_SINK_VBUS), \
67 S(DEBUG_ACC_ATTACHED), \
68 S(AUDIO_ACC_ATTACHED), \
69 S(AUDIO_ACC_DEBOUNCE), \
72 S(HARD_RESET_START), \
73 S(SRC_HARD_RESET_VBUS_OFF), \
74 S(SRC_HARD_RESET_VBUS_ON), \
75 S(SNK_HARD_RESET_SINK_OFF), \
76 S(SNK_HARD_RESET_WAIT_VBUS), \
77 S(SNK_HARD_RESET_SINK_ON), \
80 S(SRC_SOFT_RESET_WAIT_SNK_TX), \
86 S(DR_SWAP_SEND_TIMEOUT), \
88 S(DR_SWAP_CHANGE_DR), \
92 S(PR_SWAP_SEND_TIMEOUT), \
95 S(PR_SWAP_SRC_SNK_TRANSITION_OFF), \
96 S(PR_SWAP_SRC_SNK_SOURCE_OFF), \
97 S(PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED), \
98 S(PR_SWAP_SRC_SNK_SINK_ON), \
99 S(PR_SWAP_SNK_SRC_SINK_OFF), \
100 S(PR_SWAP_SNK_SRC_SOURCE_ON), \
101 S(PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP), \
103 S(VCONN_SWAP_ACCEPT), \
104 S(VCONN_SWAP_SEND), \
105 S(VCONN_SWAP_SEND_TIMEOUT), \
106 S(VCONN_SWAP_CANCEL), \
107 S(VCONN_SWAP_START), \
108 S(VCONN_SWAP_WAIT_FOR_VCONN), \
109 S(VCONN_SWAP_TURN_ON_VCONN), \
110 S(VCONN_SWAP_TURN_OFF_VCONN), \
113 S(FR_SWAP_SEND_TIMEOUT), \
114 S(FR_SWAP_SNK_SRC_TRANSITION_TO_OFF), \
115 S(FR_SWAP_SNK_SRC_NEW_SINK_READY), \
116 S(FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED), \
121 S(SNK_TRY_WAIT_DEBOUNCE), \
122 S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \
124 S(SRC_TRYWAIT_DEBOUNCE), \
125 S(SRC_TRYWAIT_UNATTACHED), \
129 S(SRC_TRY_DEBOUNCE), \
131 S(SNK_TRYWAIT_DEBOUNCE), \
132 S(SNK_TRYWAIT_VBUS), \
135 S(GET_STATUS_SEND), \
136 S(GET_STATUS_SEND_TIMEOUT), \
137 S(GET_PPS_STATUS_SEND), \
138 S(GET_PPS_STATUS_SEND_TIMEOUT), \
141 S(GET_SINK_CAP_TIMEOUT), \
145 S(PORT_RESET_WAIT_OFF), \
150 #define FOREACH_AMS(S) \
152 S(POWER_NEGOTIATION), \
157 S(GET_SOURCE_CAPABILITIES), \
158 S(GET_SINK_CAPABILITIES), \
159 S(POWER_ROLE_SWAP), \
164 S(GETTING_SOURCE_EXTENDED_CAPABILITIES),\
165 S(GETTING_SOURCE_SINK_STATUS), \
166 S(GETTING_BATTERY_CAPABILITIES), \
167 S(GETTING_BATTERY_STATUS), \
168 S(GETTING_MANUFACTURER_INFORMATION), \
170 S(FIRMWARE_UPDATE), \
171 S(DISCOVER_IDENTITY), \
172 S(SOURCE_STARTUP_CABLE_PLUG_DISCOVER_IDENTITY), \
175 S(DFP_TO_UFP_ENTER_MODE), \
176 S(DFP_TO_UFP_EXIT_MODE), \
177 S(DFP_TO_CABLE_PLUG_ENTER_MODE), \
178 S(DFP_TO_CABLE_PLUG_EXIT_MODE), \
181 S(UNSTRUCTURED_VDMS), \
182 S(STRUCTURED_VDMS), \
186 #define GENERATE_ENUM(e) e
187 #define GENERATE_STRING(s) #s
190 FOREACH_STATE(GENERATE_ENUM)
193 static const char * const tcpm_states[] = {
194 FOREACH_STATE(GENERATE_STRING)
198 FOREACH_AMS(GENERATE_ENUM)
201 static const char * const tcpm_ams_str[] = {
202 FOREACH_AMS(GENERATE_STRING)
206 VDM_STATE_ERR_BUSY = -3,
207 VDM_STATE_ERR_SEND = -2,
208 VDM_STATE_ERR_TMOUT = -1,
210 /* Anything >0 represents an active state */
213 VDM_STATE_WAIT_RSP_BUSY = 3,
214 VDM_STATE_SEND_MESSAGE = 4,
217 enum pd_msg_request {
221 PD_MSG_CTRL_NOT_SUPP,
222 PD_MSG_DATA_SINK_CAP,
223 PD_MSG_DATA_SOURCE_CAP,
228 ADEV_NOTIFY_USB_AND_QUEUE_VDM,
230 ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL,
235 * Initial current capability of the new source when vSafe5V is applied during PD3.0 Fast Role Swap.
236 * Based on "Table 6-14 Fixed Supply PDO - Sink" of "USB Power Delivery Specification Revision 3.0,
239 enum frs_typec_current {
246 /* Events from low level driver */
248 #define TCPM_CC_EVENT BIT(0)
249 #define TCPM_VBUS_EVENT BIT(1)
250 #define TCPM_RESET_EVENT BIT(2)
251 #define TCPM_FRS_EVENT BIT(3)
252 #define TCPM_SOURCING_VBUS BIT(4)
253 #define TCPM_PORT_CLEAN BIT(5)
255 #define LOG_BUFFER_ENTRIES 1024
256 #define LOG_BUFFER_ENTRY_SIZE 128
258 /* Alternate mode support */
260 #define SVID_DISCOVERY_MAX 16
261 #define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX)
263 #define GET_SINK_CAP_RETRY_MS 100
264 #define SEND_DISCOVER_RETRY_MS 100
266 struct pd_mode_data {
267 int svid_index; /* current SVID index */
269 u16 svids[SVID_DISCOVERY_MAX];
270 int altmodes; /* number of alternate modes */
271 struct typec_altmode_desc altmode_desc[ALTMODE_DISCOVERY_MAX];
275 * @min_volt: Actual min voltage at the local port
276 * @req_min_volt: Requested min voltage to the port partner
277 * @max_volt: Actual max voltage at the local port
278 * @req_max_volt: Requested max voltage to the port partner
279 * @max_curr: Actual max current at the local port
280 * @req_max_curr: Requested max current of the port partner
281 * @req_out_volt: Requested output voltage to the port partner
282 * @req_op_curr: Requested operating current to the port partner
283 * @supported: Parter has at least one APDO hence supports PPS
284 * @active: PPS mode is active
302 struct mutex lock; /* tcpm state machine lock */
303 struct kthread_worker *wq;
305 struct typec_capability typec_caps;
306 struct typec_port *typec_port;
308 struct tcpc_dev *tcpc;
309 struct usb_role_switch *role_sw;
311 enum typec_role vconn_role;
312 enum typec_role pwr_role;
313 enum typec_data_role data_role;
314 enum typec_pwr_opmode pwr_opmode;
316 struct usb_pd_identity partner_ident;
317 struct typec_partner_desc partner_desc;
318 struct typec_partner *partner;
320 enum typec_cc_status cc_req;
321 enum typec_cc_status src_rp; /* work only if pd_supported == false */
323 enum typec_cc_status cc1;
324 enum typec_cc_status cc2;
325 enum typec_cc_polarity polarity;
331 enum typec_port_type port_type;
334 * Set to true when vbus is greater than VSAFE5V min.
335 * Set to false when vbus falls below vSinkDisconnect max threshold.
340 * Set to true when vbus is less than VSAFE0V max.
341 * Set to false when vbus is greater than VSAFE0V max.
349 /* Set to true when Discover_Identity Command is expected to be sent in Ready states. */
357 enum pd_msg_request queued_message;
359 enum tcpm_state enter_state;
360 enum tcpm_state prev_state;
361 enum tcpm_state state;
362 enum tcpm_state delayed_state;
363 ktime_t delayed_runtime;
364 unsigned long delay_ms;
366 spinlock_t pd_event_lock;
369 struct kthread_work event_work;
370 struct hrtimer state_machine_timer;
371 struct kthread_work state_machine;
372 struct hrtimer vdm_state_machine_timer;
373 struct kthread_work vdm_state_machine;
374 struct hrtimer enable_frs_timer;
375 struct kthread_work enable_frs;
376 struct hrtimer send_discover_timer;
377 struct kthread_work send_discover_work;
378 bool state_machine_running;
379 /* Set to true when VDM State Machine has following actions. */
382 struct completion tx_complete;
383 enum tcpm_transmit_status tx_status;
385 struct mutex swap_lock; /* swap command lock */
387 bool non_pd_role_swap;
388 struct completion swap_complete;
391 unsigned int negotiated_rev;
392 unsigned int message_id;
393 unsigned int caps_count;
394 unsigned int hard_reset_count;
396 bool explicit_contract;
397 unsigned int rx_msgid;
400 struct usb_power_delivery *pd;
401 struct usb_power_delivery_capabilities *port_source_caps;
402 struct usb_power_delivery_capabilities *port_sink_caps;
403 struct usb_power_delivery *partner_pd;
404 struct usb_power_delivery_capabilities *partner_source_caps;
405 struct usb_power_delivery_capabilities *partner_sink_caps;
407 /* Partner capabilities/requests */
409 u32 source_caps[PDO_MAX_OBJECTS];
410 unsigned int nr_source_caps;
411 u32 sink_caps[PDO_MAX_OBJECTS];
412 unsigned int nr_sink_caps;
414 /* Local capabilities */
415 u32 src_pdo[PDO_MAX_OBJECTS];
416 unsigned int nr_src_pdo;
417 u32 snk_pdo[PDO_MAX_OBJECTS];
418 unsigned int nr_snk_pdo;
419 u32 snk_vdo_v1[VDO_MAX_OBJECTS];
420 unsigned int nr_snk_vdo_v1;
421 u32 snk_vdo[VDO_MAX_OBJECTS];
422 unsigned int nr_snk_vdo;
424 unsigned int operating_snk_mw;
425 bool update_sink_caps;
427 /* Requested current / voltage to the port partner */
428 u32 req_current_limit;
429 u32 req_supply_voltage;
430 /* Actual current / voltage limit of the local port */
434 /* Used to export TA voltage and current */
435 struct power_supply *psy;
436 struct power_supply_desc psy_desc;
437 enum power_supply_usb_type usb_type;
441 /* PD state for Vendor Defined Messages */
442 enum vdm_states vdm_state;
444 /* next Vendor Defined Message to send */
445 u32 vdo_data[VDO_MAX_SIZE];
447 /* VDO to retry if UFP responder replied busy */
451 struct pd_pps_data pps_data;
452 struct completion pps_complete;
456 /* Alternate mode data */
457 struct pd_mode_data mode_data;
458 struct typec_altmode *partner_altmode[ALTMODE_DISCOVERY_MAX];
459 struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX];
461 /* Deadline in jiffies to exit src_try_wait state */
462 unsigned long max_wait;
464 /* port belongs to a self powered device */
468 enum frs_typec_current new_source_frs_current;
470 /* Sink caps have been queried */
473 /* Collision Avoidance and Atomic Message Sequence */
474 enum tcpm_state upcoming_state;
476 enum tcpm_ams next_ams;
479 /* Auto vbus discharge status */
480 bool auto_vbus_discharge_enabled;
483 * When set, port requests PD_P_SNK_STDBY_MW upon entering SNK_DISCOVERY and
484 * the actual current limit after RX of PD_CTRL_PSRDY for PD link,
485 * SNK_READY for non-pd link.
487 bool slow_charger_loop;
490 * When true indicates that the lower level drivers indicate potential presence
491 * of contaminant in the connector pins based on the tcpm state machine
494 bool potential_contaminant;
495 #ifdef CONFIG_DEBUG_FS
496 struct dentry *dentry;
497 struct mutex logbuffer_lock; /* log buffer access lock */
500 u8 *logbuffer[LOG_BUFFER_ENTRIES];
505 struct kthread_work work;
506 struct tcpm_port *port;
507 struct pd_message msg;
510 static const char * const pd_rev[] = {
516 #define tcpm_cc_is_sink(cc) \
517 ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \
518 (cc) == TYPEC_CC_RP_3_0)
520 #define tcpm_port_is_sink(port) \
521 ((tcpm_cc_is_sink((port)->cc1) && !tcpm_cc_is_sink((port)->cc2)) || \
522 (tcpm_cc_is_sink((port)->cc2) && !tcpm_cc_is_sink((port)->cc1)))
524 #define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD)
525 #define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA)
526 #define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN)
528 #define tcpm_port_is_source(port) \
529 ((tcpm_cc_is_source((port)->cc1) && \
530 !tcpm_cc_is_source((port)->cc2)) || \
531 (tcpm_cc_is_source((port)->cc2) && \
532 !tcpm_cc_is_source((port)->cc1)))
534 #define tcpm_port_is_debug(port) \
535 (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2))
537 #define tcpm_port_is_audio(port) \
538 (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2))
540 #define tcpm_port_is_audio_detached(port) \
541 ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \
542 (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1)))
544 #define tcpm_try_snk(port) \
545 ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \
546 (port)->port_type == TYPEC_PORT_DRP)
548 #define tcpm_try_src(port) \
549 ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \
550 (port)->port_type == TYPEC_PORT_DRP)
552 #define tcpm_data_role_for_source(port) \
553 ((port)->typec_caps.data == TYPEC_PORT_UFP ? \
554 TYPEC_DEVICE : TYPEC_HOST)
556 #define tcpm_data_role_for_sink(port) \
557 ((port)->typec_caps.data == TYPEC_PORT_DFP ? \
558 TYPEC_HOST : TYPEC_DEVICE)
560 #define tcpm_sink_tx_ok(port) \
561 (tcpm_port_is_sink(port) && \
562 ((port)->cc1 == TYPEC_CC_RP_3_0 || (port)->cc2 == TYPEC_CC_RP_3_0))
564 #define tcpm_wait_for_discharge(port) \
565 (((port)->auto_vbus_discharge_enabled && !(port)->vbus_vsafe0v) ? PD_T_SAFE_0V : 0)
567 static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
569 if (port->port_type == TYPEC_PORT_DRP) {
570 if (port->try_role == TYPEC_SINK)
571 return SNK_UNATTACHED;
572 else if (port->try_role == TYPEC_SOURCE)
573 return SRC_UNATTACHED;
574 /* Fall through to return SRC_UNATTACHED */
575 } else if (port->port_type == TYPEC_PORT_SNK) {
576 return SNK_UNATTACHED;
578 return SRC_UNATTACHED;
581 static bool tcpm_port_is_disconnected(struct tcpm_port *port)
583 return (!port->attached && port->cc1 == TYPEC_CC_OPEN &&
584 port->cc2 == TYPEC_CC_OPEN) ||
585 (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 &&
586 port->cc1 == TYPEC_CC_OPEN) ||
587 (port->polarity == TYPEC_POLARITY_CC2 &&
588 port->cc2 == TYPEC_CC_OPEN)));
595 #ifdef CONFIG_DEBUG_FS
597 static bool tcpm_log_full(struct tcpm_port *port)
599 return port->logbuffer_tail ==
600 (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
604 static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args)
606 char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
607 u64 ts_nsec = local_clock();
608 unsigned long rem_nsec;
610 mutex_lock(&port->logbuffer_lock);
611 if (!port->logbuffer[port->logbuffer_head]) {
612 port->logbuffer[port->logbuffer_head] =
613 kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
614 if (!port->logbuffer[port->logbuffer_head]) {
615 mutex_unlock(&port->logbuffer_lock);
620 vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
622 if (tcpm_log_full(port)) {
623 port->logbuffer_head = max(port->logbuffer_head - 1, 0);
624 strcpy(tmpbuffer, "overflow");
627 if (port->logbuffer_head < 0 ||
628 port->logbuffer_head >= LOG_BUFFER_ENTRIES) {
630 "Bad log buffer index %d\n", port->logbuffer_head);
634 if (!port->logbuffer[port->logbuffer_head]) {
636 "Log buffer index %d is NULL\n", port->logbuffer_head);
640 rem_nsec = do_div(ts_nsec, 1000000000);
641 scnprintf(port->logbuffer[port->logbuffer_head],
642 LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
643 (unsigned long)ts_nsec, rem_nsec / 1000,
645 port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
648 mutex_unlock(&port->logbuffer_lock);
652 static void tcpm_log(struct tcpm_port *port, const char *fmt, ...)
656 /* Do not log while disconnected and unattached */
657 if (tcpm_port_is_disconnected(port) &&
658 (port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED ||
659 port->state == TOGGLING || port->state == CHECK_CONTAMINANT))
663 _tcpm_log(port, fmt, args);
668 static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...)
673 _tcpm_log(port, fmt, args);
677 static void tcpm_log_source_caps(struct tcpm_port *port)
681 for (i = 0; i < port->nr_source_caps; i++) {
682 u32 pdo = port->source_caps[i];
683 enum pd_pdo_type type = pdo_type(pdo);
688 scnprintf(msg, sizeof(msg),
689 "%u mV, %u mA [%s%s%s%s%s%s]",
690 pdo_fixed_voltage(pdo),
691 pdo_max_current(pdo),
692 (pdo & PDO_FIXED_DUAL_ROLE) ?
694 (pdo & PDO_FIXED_SUSPEND) ?
696 (pdo & PDO_FIXED_HIGHER_CAP) ?
698 (pdo & PDO_FIXED_USB_COMM) ?
700 (pdo & PDO_FIXED_DATA_SWAP) ?
702 (pdo & PDO_FIXED_EXTPOWER) ?
706 scnprintf(msg, sizeof(msg),
708 pdo_min_voltage(pdo),
709 pdo_max_voltage(pdo),
710 pdo_max_current(pdo));
713 scnprintf(msg, sizeof(msg),
715 pdo_min_voltage(pdo),
716 pdo_max_voltage(pdo),
720 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS)
721 scnprintf(msg, sizeof(msg),
723 pdo_pps_apdo_min_voltage(pdo),
724 pdo_pps_apdo_max_voltage(pdo),
725 pdo_pps_apdo_max_current(pdo));
727 strcpy(msg, "undefined APDO");
730 strcpy(msg, "undefined");
733 tcpm_log(port, " PDO %d: type %d, %s",
738 static int tcpm_debug_show(struct seq_file *s, void *v)
740 struct tcpm_port *port = s->private;
743 mutex_lock(&port->logbuffer_lock);
744 tail = port->logbuffer_tail;
745 while (tail != port->logbuffer_head) {
746 seq_printf(s, "%s\n", port->logbuffer[tail]);
747 tail = (tail + 1) % LOG_BUFFER_ENTRIES;
749 if (!seq_has_overflowed(s))
750 port->logbuffer_tail = tail;
751 mutex_unlock(&port->logbuffer_lock);
755 DEFINE_SHOW_ATTRIBUTE(tcpm_debug);
757 static void tcpm_debugfs_init(struct tcpm_port *port)
761 mutex_init(&port->logbuffer_lock);
762 snprintf(name, NAME_MAX, "tcpm-%s", dev_name(port->dev));
763 port->dentry = debugfs_create_dir(name, usb_debug_root);
764 debugfs_create_file("log", S_IFREG | 0444, port->dentry, port,
768 static void tcpm_debugfs_exit(struct tcpm_port *port)
772 mutex_lock(&port->logbuffer_lock);
773 for (i = 0; i < LOG_BUFFER_ENTRIES; i++) {
774 kfree(port->logbuffer[i]);
775 port->logbuffer[i] = NULL;
777 mutex_unlock(&port->logbuffer_lock);
779 debugfs_remove(port->dentry);
785 static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { }
787 static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { }
788 static void tcpm_log_source_caps(struct tcpm_port *port) { }
789 static void tcpm_debugfs_init(const struct tcpm_port *port) { }
790 static void tcpm_debugfs_exit(const struct tcpm_port *port) { }
794 static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc)
796 tcpm_log(port, "cc:=%d", cc);
798 port->tcpc->set_cc(port->tcpc, cc);
801 static int tcpm_enable_auto_vbus_discharge(struct tcpm_port *port, bool enable)
805 if (port->tcpc->enable_auto_vbus_discharge) {
806 ret = port->tcpc->enable_auto_vbus_discharge(port->tcpc, enable);
807 tcpm_log_force(port, "%s vbus discharge ret:%d", enable ? "enable" : "disable",
810 port->auto_vbus_discharge_enabled = enable;
816 static void tcpm_apply_rc(struct tcpm_port *port)
819 * TCPCI: Move to APPLY_RC state to prevent disconnect during PR_SWAP
820 * when Vbus auto discharge on disconnect is enabled.
822 if (port->tcpc->enable_auto_vbus_discharge && port->tcpc->apply_rc) {
823 tcpm_log(port, "Apply_RC");
824 port->tcpc->apply_rc(port->tcpc, port->cc_req, port->polarity);
825 tcpm_enable_auto_vbus_discharge(port, false);
830 * Determine RP value to set based on maximum current supported
831 * by a port if configured as source.
832 * Returns CC value to report to link partner.
834 static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port)
836 const u32 *src_pdo = port->src_pdo;
837 int nr_pdo = port->nr_src_pdo;
840 if (!port->pd_supported)
844 * Search for first entry with matching voltage.
845 * It should report the maximum supported current.
847 for (i = 0; i < nr_pdo; i++) {
848 const u32 pdo = src_pdo[i];
850 if (pdo_type(pdo) == PDO_TYPE_FIXED &&
851 pdo_fixed_voltage(pdo) == 5000) {
852 unsigned int curr = pdo_max_current(pdo);
855 return TYPEC_CC_RP_3_0;
856 else if (curr >= 1500)
857 return TYPEC_CC_RP_1_5;
858 return TYPEC_CC_RP_DEF;
862 return TYPEC_CC_RP_DEF;
865 static void tcpm_ams_finish(struct tcpm_port *port)
867 tcpm_log(port, "AMS %s finished", tcpm_ams_str[port->ams]);
869 if (port->pd_capable && port->pwr_role == TYPEC_SOURCE) {
870 if (port->negotiated_rev >= PD_REV30)
871 tcpm_set_cc(port, SINK_TX_OK);
873 tcpm_set_cc(port, SINK_TX_NG);
874 } else if (port->pwr_role == TYPEC_SOURCE) {
875 tcpm_set_cc(port, tcpm_rp_cc(port));
878 port->in_ams = false;
879 port->ams = NONE_AMS;
882 static int tcpm_pd_transmit(struct tcpm_port *port,
883 enum tcpm_transmit_type type,
884 const struct pd_message *msg)
886 unsigned long timeout;
890 tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header));
892 tcpm_log(port, "PD TX, type: %#x", type);
894 reinit_completion(&port->tx_complete);
895 ret = port->tcpc->pd_transmit(port->tcpc, type, msg, port->negotiated_rev);
899 mutex_unlock(&port->lock);
900 timeout = wait_for_completion_timeout(&port->tx_complete,
901 msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT));
902 mutex_lock(&port->lock);
906 switch (port->tx_status) {
907 case TCPC_TX_SUCCESS:
908 port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK;
910 * USB PD rev 2.0, 8.3.2.2.1:
911 * USB PD rev 3.0, 8.3.2.1.3:
912 * "... Note that every AMS is Interruptible until the first
913 * Message in the sequence has been successfully sent (GoodCRC
914 * Message received)."
916 if (port->ams != NONE_AMS)
919 case TCPC_TX_DISCARDED:
928 /* Some AMS don't expect responses. Finish them here. */
929 if (port->ams == ATTENTION || port->ams == SOURCE_ALERT)
930 tcpm_ams_finish(port);
935 void tcpm_pd_transmit_complete(struct tcpm_port *port,
936 enum tcpm_transmit_status status)
938 tcpm_log(port, "PD TX complete, status: %u", status);
939 port->tx_status = status;
940 complete(&port->tx_complete);
942 EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete);
944 static int tcpm_mux_set(struct tcpm_port *port, int state,
945 enum usb_role usb_role,
946 enum typec_orientation orientation)
950 tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d",
951 state, usb_role, orientation);
953 ret = typec_set_orientation(port->typec_port, orientation);
958 ret = usb_role_switch_set_role(port->role_sw, usb_role);
963 return typec_set_mode(port->typec_port, state);
966 static int tcpm_set_polarity(struct tcpm_port *port,
967 enum typec_cc_polarity polarity)
971 tcpm_log(port, "polarity %d", polarity);
973 ret = port->tcpc->set_polarity(port->tcpc, polarity);
977 port->polarity = polarity;
982 static int tcpm_set_vconn(struct tcpm_port *port, bool enable)
986 tcpm_log(port, "vconn:=%d", enable);
988 ret = port->tcpc->set_vconn(port->tcpc, enable);
990 port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK;
991 typec_set_vconn_role(port->typec_port, port->vconn_role);
997 static u32 tcpm_get_current_limit(struct tcpm_port *port)
999 enum typec_cc_status cc;
1002 cc = port->polarity ? port->cc2 : port->cc1;
1004 case TYPEC_CC_RP_1_5:
1007 case TYPEC_CC_RP_3_0:
1010 case TYPEC_CC_RP_DEF:
1012 if (port->tcpc->get_current_limit)
1013 limit = port->tcpc->get_current_limit(port->tcpc);
1022 static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv)
1024 int ret = -EOPNOTSUPP;
1026 tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma);
1028 port->supply_voltage = mv;
1029 port->current_limit = max_ma;
1030 power_supply_changed(port->psy);
1032 if (port->tcpc->set_current_limit)
1033 ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv);
1038 static int tcpm_set_attached_state(struct tcpm_port *port, bool attached)
1040 return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role,
1044 static int tcpm_set_roles(struct tcpm_port *port, bool attached,
1045 enum typec_role role, enum typec_data_role data)
1047 enum typec_orientation orientation;
1048 enum usb_role usb_role;
1051 if (port->polarity == TYPEC_POLARITY_CC1)
1052 orientation = TYPEC_ORIENTATION_NORMAL;
1054 orientation = TYPEC_ORIENTATION_REVERSE;
1056 if (port->typec_caps.data == TYPEC_PORT_DRD) {
1057 if (data == TYPEC_HOST)
1058 usb_role = USB_ROLE_HOST;
1060 usb_role = USB_ROLE_DEVICE;
1061 } else if (port->typec_caps.data == TYPEC_PORT_DFP) {
1062 if (data == TYPEC_HOST) {
1063 if (role == TYPEC_SOURCE)
1064 usb_role = USB_ROLE_HOST;
1066 usb_role = USB_ROLE_NONE;
1071 if (data == TYPEC_DEVICE) {
1072 if (role == TYPEC_SINK)
1073 usb_role = USB_ROLE_DEVICE;
1075 usb_role = USB_ROLE_NONE;
1081 ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation);
1085 ret = port->tcpc->set_roles(port->tcpc, attached, role, data);
1089 port->pwr_role = role;
1090 port->data_role = data;
1091 typec_set_data_role(port->typec_port, data);
1092 typec_set_pwr_role(port->typec_port, role);
1097 static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role)
1101 ret = port->tcpc->set_roles(port->tcpc, true, role,
1106 port->pwr_role = role;
1107 typec_set_pwr_role(port->typec_port, role);
1113 * Transform the PDO to be compliant to PD rev2.0.
1114 * Return 0 if the PDO type is not defined in PD rev2.0.
1115 * Otherwise, return the converted PDO.
1117 static u32 tcpm_forge_legacy_pdo(struct tcpm_port *port, u32 pdo, enum typec_role role)
1119 switch (pdo_type(pdo)) {
1120 case PDO_TYPE_FIXED:
1121 if (role == TYPEC_SINK)
1122 return pdo & ~PDO_FIXED_FRS_CURR_MASK;
1124 return pdo & ~PDO_FIXED_UNCHUNK_EXT;
1134 static int tcpm_pd_send_source_caps(struct tcpm_port *port)
1136 struct pd_message msg;
1138 unsigned int i, nr_pdo = 0;
1140 memset(&msg, 0, sizeof(msg));
1142 for (i = 0; i < port->nr_src_pdo; i++) {
1143 if (port->negotiated_rev >= PD_REV30) {
1144 msg.payload[nr_pdo++] = cpu_to_le32(port->src_pdo[i]);
1146 pdo = tcpm_forge_legacy_pdo(port, port->src_pdo[i], TYPEC_SOURCE);
1148 msg.payload[nr_pdo++] = cpu_to_le32(pdo);
1153 /* No source capabilities defined, sink only */
1154 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
1157 port->negotiated_rev,
1158 port->message_id, 0);
1160 msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP,
1163 port->negotiated_rev,
1168 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
1171 static int tcpm_pd_send_sink_caps(struct tcpm_port *port)
1173 struct pd_message msg;
1175 unsigned int i, nr_pdo = 0;
1177 memset(&msg, 0, sizeof(msg));
1179 for (i = 0; i < port->nr_snk_pdo; i++) {
1180 if (port->negotiated_rev >= PD_REV30) {
1181 msg.payload[nr_pdo++] = cpu_to_le32(port->snk_pdo[i]);
1183 pdo = tcpm_forge_legacy_pdo(port, port->snk_pdo[i], TYPEC_SINK);
1185 msg.payload[nr_pdo++] = cpu_to_le32(pdo);
1190 /* No sink capabilities defined, source only */
1191 msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
1194 port->negotiated_rev,
1195 port->message_id, 0);
1197 msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP,
1200 port->negotiated_rev,
1205 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
1208 static void mod_tcpm_delayed_work(struct tcpm_port *port, unsigned int delay_ms)
1211 hrtimer_start(&port->state_machine_timer, ms_to_ktime(delay_ms), HRTIMER_MODE_REL);
1213 hrtimer_cancel(&port->state_machine_timer);
1214 kthread_queue_work(port->wq, &port->state_machine);
1218 static void mod_vdm_delayed_work(struct tcpm_port *port, unsigned int delay_ms)
1221 hrtimer_start(&port->vdm_state_machine_timer, ms_to_ktime(delay_ms),
1224 hrtimer_cancel(&port->vdm_state_machine_timer);
1225 kthread_queue_work(port->wq, &port->vdm_state_machine);
1229 static void mod_enable_frs_delayed_work(struct tcpm_port *port, unsigned int delay_ms)
1232 hrtimer_start(&port->enable_frs_timer, ms_to_ktime(delay_ms), HRTIMER_MODE_REL);
1234 hrtimer_cancel(&port->enable_frs_timer);
1235 kthread_queue_work(port->wq, &port->enable_frs);
1239 static void mod_send_discover_delayed_work(struct tcpm_port *port, unsigned int delay_ms)
1242 hrtimer_start(&port->send_discover_timer, ms_to_ktime(delay_ms), HRTIMER_MODE_REL);
1244 hrtimer_cancel(&port->send_discover_timer);
1245 kthread_queue_work(port->wq, &port->send_discover_work);
1249 static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state,
1250 unsigned int delay_ms)
1253 tcpm_log(port, "pending state change %s -> %s @ %u ms [%s %s]",
1254 tcpm_states[port->state], tcpm_states[state], delay_ms,
1255 pd_rev[port->negotiated_rev], tcpm_ams_str[port->ams]);
1256 port->delayed_state = state;
1257 mod_tcpm_delayed_work(port, delay_ms);
1258 port->delayed_runtime = ktime_add(ktime_get(), ms_to_ktime(delay_ms));
1259 port->delay_ms = delay_ms;
1261 tcpm_log(port, "state change %s -> %s [%s %s]",
1262 tcpm_states[port->state], tcpm_states[state],
1263 pd_rev[port->negotiated_rev], tcpm_ams_str[port->ams]);
1264 port->delayed_state = INVALID_STATE;
1265 port->prev_state = port->state;
1266 port->state = state;
1268 * Don't re-queue the state machine work item if we're currently
1269 * in the state machine and we're immediately changing states.
1270 * tcpm_state_machine_work() will continue running the state
1273 if (!port->state_machine_running)
1274 mod_tcpm_delayed_work(port, 0);
1278 static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state,
1279 unsigned int delay_ms)
1281 if (port->enter_state == port->state)
1282 tcpm_set_state(port, state, delay_ms);
1285 "skipped %sstate change %s -> %s [%u ms], context state %s [%s %s]",
1286 delay_ms ? "delayed " : "",
1287 tcpm_states[port->state], tcpm_states[state],
1288 delay_ms, tcpm_states[port->enter_state],
1289 pd_rev[port->negotiated_rev], tcpm_ams_str[port->ams]);
1292 static void tcpm_queue_message(struct tcpm_port *port,
1293 enum pd_msg_request message)
1295 port->queued_message = message;
1296 mod_tcpm_delayed_work(port, 0);
1299 static bool tcpm_vdm_ams(struct tcpm_port *port)
1301 switch (port->ams) {
1302 case DISCOVER_IDENTITY:
1303 case SOURCE_STARTUP_CABLE_PLUG_DISCOVER_IDENTITY:
1304 case DISCOVER_SVIDS:
1305 case DISCOVER_MODES:
1306 case DFP_TO_UFP_ENTER_MODE:
1307 case DFP_TO_UFP_EXIT_MODE:
1308 case DFP_TO_CABLE_PLUG_ENTER_MODE:
1309 case DFP_TO_CABLE_PLUG_EXIT_MODE:
1311 case UNSTRUCTURED_VDMS:
1312 case STRUCTURED_VDMS:
1321 static bool tcpm_ams_interruptible(struct tcpm_port *port)
1323 switch (port->ams) {
1324 /* Interruptible AMS */
1327 case FIRMWARE_UPDATE:
1328 case DISCOVER_IDENTITY:
1329 case SOURCE_STARTUP_CABLE_PLUG_DISCOVER_IDENTITY:
1330 case DISCOVER_SVIDS:
1331 case DISCOVER_MODES:
1332 case DFP_TO_UFP_ENTER_MODE:
1333 case DFP_TO_UFP_EXIT_MODE:
1334 case DFP_TO_CABLE_PLUG_ENTER_MODE:
1335 case DFP_TO_CABLE_PLUG_EXIT_MODE:
1336 case UNSTRUCTURED_VDMS:
1337 case STRUCTURED_VDMS:
1341 /* Non-Interruptible AMS */
1351 static int tcpm_ams_start(struct tcpm_port *port, enum tcpm_ams ams)
1355 tcpm_log(port, "AMS %s start", tcpm_ams_str[ams]);
1357 if (!tcpm_ams_interruptible(port) &&
1358 !(ams == HARD_RESET || ams == SOFT_RESET_AMS)) {
1359 port->upcoming_state = INVALID_STATE;
1360 tcpm_log(port, "AMS %s not interruptible, aborting",
1361 tcpm_ams_str[port->ams]);
1365 if (port->pwr_role == TYPEC_SOURCE) {
1366 enum typec_cc_status cc_req = port->cc_req;
1370 if (ams == HARD_RESET) {
1371 tcpm_set_cc(port, tcpm_rp_cc(port));
1372 tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL);
1373 tcpm_set_state(port, HARD_RESET_START, 0);
1375 } else if (ams == SOFT_RESET_AMS) {
1376 if (!port->explicit_contract)
1377 tcpm_set_cc(port, tcpm_rp_cc(port));
1378 tcpm_set_state(port, SOFT_RESET_SEND, 0);
1380 } else if (tcpm_vdm_ams(port)) {
1381 /* tSinkTx is enforced in vdm_run_state_machine */
1382 if (port->negotiated_rev >= PD_REV30)
1383 tcpm_set_cc(port, SINK_TX_NG);
1387 if (port->negotiated_rev >= PD_REV30)
1388 tcpm_set_cc(port, SINK_TX_NG);
1390 switch (port->state) {
1393 case SRC_SOFT_RESET_WAIT_SNK_TX:
1395 case SOFT_RESET_SEND:
1396 if (port->negotiated_rev >= PD_REV30)
1397 tcpm_set_state(port, AMS_START,
1398 cc_req == SINK_TX_OK ?
1401 tcpm_set_state(port, AMS_START, 0);
1404 if (port->negotiated_rev >= PD_REV30)
1405 tcpm_set_state(port, SRC_READY,
1406 cc_req == SINK_TX_OK ?
1409 tcpm_set_state(port, SRC_READY, 0);
1413 if (port->negotiated_rev >= PD_REV30 &&
1414 !tcpm_sink_tx_ok(port) &&
1415 ams != SOFT_RESET_AMS &&
1416 ams != HARD_RESET) {
1417 port->upcoming_state = INVALID_STATE;
1418 tcpm_log(port, "Sink TX No Go");
1424 if (ams == HARD_RESET) {
1425 tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL);
1426 tcpm_set_state(port, HARD_RESET_START, 0);
1428 } else if (tcpm_vdm_ams(port)) {
1432 if (port->state == SNK_READY ||
1433 port->state == SNK_SOFT_RESET)
1434 tcpm_set_state(port, AMS_START, 0);
1436 tcpm_set_state(port, SNK_READY, 0);
1443 * VDM/VDO handling functions
1445 static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
1446 const u32 *data, int cnt)
1448 u32 vdo_hdr = port->vdo_data[0];
1450 WARN_ON(!mutex_is_locked(&port->lock));
1452 /* If is sending discover_identity, handle received message first */
1453 if (PD_VDO_SVDM(vdo_hdr) && PD_VDO_CMD(vdo_hdr) == CMD_DISCOVER_IDENT) {
1454 port->send_discover = true;
1455 mod_send_discover_delayed_work(port, SEND_DISCOVER_RETRY_MS);
1457 /* Make sure we are not still processing a previous VDM packet */
1458 WARN_ON(port->vdm_state > VDM_STATE_DONE);
1461 port->vdo_count = cnt + 1;
1462 port->vdo_data[0] = header;
1463 memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt);
1464 /* Set ready, vdm state machine will actually send */
1465 port->vdm_retries = 0;
1466 port->vdm_state = VDM_STATE_READY;
1467 port->vdm_sm_running = true;
1469 mod_vdm_delayed_work(port, 0);
1472 static void tcpm_queue_vdm_unlocked(struct tcpm_port *port, const u32 header,
1473 const u32 *data, int cnt)
1475 mutex_lock(&port->lock);
1476 tcpm_queue_vdm(port, header, data, cnt);
1477 mutex_unlock(&port->lock);
1480 static void svdm_consume_identity(struct tcpm_port *port, const u32 *p, int cnt)
1482 u32 vdo = p[VDO_INDEX_IDH];
1483 u32 product = p[VDO_INDEX_PRODUCT];
1485 memset(&port->mode_data, 0, sizeof(port->mode_data));
1487 port->partner_ident.id_header = vdo;
1488 port->partner_ident.cert_stat = p[VDO_INDEX_CSTAT];
1489 port->partner_ident.product = product;
1491 typec_partner_set_identity(port->partner);
1493 tcpm_log(port, "Identity: %04x:%04x.%04x",
1495 PD_PRODUCT_PID(product), product & 0xffff);
1498 static bool svdm_consume_svids(struct tcpm_port *port, const u32 *p, int cnt)
1500 struct pd_mode_data *pmdata = &port->mode_data;
1503 for (i = 1; i < cnt; i++) {
1506 svid = (p[i] >> 16) & 0xffff;
1510 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
1513 pmdata->svids[pmdata->nsvids++] = svid;
1514 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
1516 svid = p[i] & 0xffff;
1520 if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
1523 pmdata->svids[pmdata->nsvids++] = svid;
1524 tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
1528 * PD3.0 Spec 6.4.4.3.2: The SVIDs are returned 2 per VDO (see Table
1529 * 6-43), and can be returned maximum 6 VDOs per response (see Figure
1530 * 6-19). If the Respondersupports 12 or more SVID then the Discover
1531 * SVIDs Command Shall be executed multiple times until a Discover
1532 * SVIDs VDO is returned ending either with a SVID value of 0x0000 in
1533 * the last part of the last VDO or with a VDO containing two SVIDs
1534 * with values of 0x0000.
1536 * However, some odd dockers support SVIDs less than 12 but without
1537 * 0x0000 in the last VDO, so we need to break the Discover SVIDs
1538 * request and return false here.
1542 tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX);
1546 static void svdm_consume_modes(struct tcpm_port *port, const u32 *p, int cnt)
1548 struct pd_mode_data *pmdata = &port->mode_data;
1549 struct typec_altmode_desc *paltmode;
1552 if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) {
1553 /* Already logged in svdm_consume_svids() */
1557 for (i = 1; i < cnt; i++) {
1558 paltmode = &pmdata->altmode_desc[pmdata->altmodes];
1559 memset(paltmode, 0, sizeof(*paltmode));
1561 paltmode->svid = pmdata->svids[pmdata->svid_index];
1563 paltmode->vdo = p[i];
1565 tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x",
1566 pmdata->altmodes, paltmode->svid,
1567 paltmode->mode, paltmode->vdo);
1573 static void tcpm_register_partner_altmodes(struct tcpm_port *port)
1575 struct pd_mode_data *modep = &port->mode_data;
1576 struct typec_altmode *altmode;
1579 for (i = 0; i < modep->altmodes; i++) {
1580 altmode = typec_partner_register_altmode(port->partner,
1581 &modep->altmode_desc[i]);
1582 if (IS_ERR(altmode)) {
1583 tcpm_log(port, "Failed to register partner SVID 0x%04x",
1584 modep->altmode_desc[i].svid);
1587 port->partner_altmode[i] = altmode;
1591 #define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header)
1593 static int tcpm_pd_svdm(struct tcpm_port *port, struct typec_altmode *adev,
1594 const u32 *p, int cnt, u32 *response,
1595 enum adev_actions *adev_action)
1597 struct typec_port *typec = port->typec_port;
1598 struct typec_altmode *pdev;
1599 struct pd_mode_data *modep;
1606 cmd_type = PD_VDO_CMDT(p[0]);
1607 cmd = PD_VDO_CMD(p[0]);
1609 tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d",
1610 p[0], cmd_type, cmd, cnt);
1612 modep = &port->mode_data;
1614 pdev = typec_match_altmode(port->partner_altmode, ALTMODE_DISCOVERY_MAX,
1615 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1617 svdm_version = typec_get_negotiated_svdm_version(typec);
1618 if (svdm_version < 0)
1624 case CMD_DISCOVER_IDENT:
1625 if (PD_VDO_VID(p[0]) != USB_SID_PD)
1628 if (PD_VDO_SVDM_VER(p[0]) < svdm_version) {
1629 typec_partner_set_svdm_version(port->partner,
1630 PD_VDO_SVDM_VER(p[0]));
1631 svdm_version = PD_VDO_SVDM_VER(p[0]);
1634 port->ams = DISCOVER_IDENTITY;
1636 * PD2.0 Spec 6.10.3: respond with NAK as DFP (data host)
1637 * PD3.1 Spec 6.4.4.2.5.1: respond with NAK if "invalid field" or
1638 * "wrong configuation" or "Unrecognized"
1640 if ((port->data_role == TYPEC_DEVICE || svdm_version >= SVDM_VER_2_0) &&
1642 if (svdm_version < SVDM_VER_2_0) {
1643 for (i = 0; i < port->nr_snk_vdo_v1; i++)
1644 response[i + 1] = port->snk_vdo_v1[i];
1645 rlen = port->nr_snk_vdo_v1 + 1;
1648 for (i = 0; i < port->nr_snk_vdo; i++)
1649 response[i + 1] = port->snk_vdo[i];
1650 rlen = port->nr_snk_vdo + 1;
1654 case CMD_DISCOVER_SVID:
1655 port->ams = DISCOVER_SVIDS;
1657 case CMD_DISCOVER_MODES:
1658 port->ams = DISCOVER_MODES;
1660 case CMD_ENTER_MODE:
1661 port->ams = DFP_TO_UFP_ENTER_MODE;
1664 port->ams = DFP_TO_UFP_EXIT_MODE;
1667 /* Attention command does not have response */
1668 *adev_action = ADEV_ATTENTION;
1674 response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK);
1675 } else if (rlen == 0) {
1676 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
1679 response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY);
1682 response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) |
1683 (VDO_SVDM_VERS(typec_get_negotiated_svdm_version(typec)));
1686 /* silently drop message if we are not connected */
1687 if (IS_ERR_OR_NULL(port->partner))
1690 tcpm_ams_finish(port);
1693 case CMD_DISCOVER_IDENT:
1694 if (PD_VDO_SVDM_VER(p[0]) < svdm_version)
1695 typec_partner_set_svdm_version(port->partner,
1696 PD_VDO_SVDM_VER(p[0]));
1698 svdm_consume_identity(port, p, cnt);
1699 response[0] = VDO(USB_SID_PD, 1, typec_get_negotiated_svdm_version(typec),
1703 case CMD_DISCOVER_SVID:
1705 if (svdm_consume_svids(port, p, cnt)) {
1706 response[0] = VDO(USB_SID_PD, 1, svdm_version, CMD_DISCOVER_SVID);
1708 } else if (modep->nsvids && supports_modal(port)) {
1709 response[0] = VDO(modep->svids[0], 1, svdm_version,
1710 CMD_DISCOVER_MODES);
1714 case CMD_DISCOVER_MODES:
1716 svdm_consume_modes(port, p, cnt);
1717 modep->svid_index++;
1718 if (modep->svid_index < modep->nsvids) {
1719 u16 svid = modep->svids[modep->svid_index];
1720 response[0] = VDO(svid, 1, svdm_version, CMD_DISCOVER_MODES);
1723 tcpm_register_partner_altmodes(port);
1726 case CMD_ENTER_MODE:
1728 *adev_action = ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL;
1732 /* Back to USB Operation */
1733 *adev_action = ADEV_NOTIFY_USB_AND_QUEUE_VDM;
1737 case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15):
1740 /* Unrecognized SVDM */
1741 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
1743 response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) |
1744 (VDO_SVDM_VERS(svdm_version));
1749 tcpm_ams_finish(port);
1751 case CMD_DISCOVER_IDENT:
1752 case CMD_DISCOVER_SVID:
1753 case CMD_DISCOVER_MODES:
1754 case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15):
1756 case CMD_ENTER_MODE:
1757 /* Back to USB Operation */
1758 *adev_action = ADEV_NOTIFY_USB_AND_QUEUE_VDM;
1761 /* Unrecognized SVDM */
1762 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
1764 response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) |
1765 (VDO_SVDM_VERS(svdm_version));
1770 response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
1772 response[0] = (response[0] & ~VDO_SVDM_VERS_MASK) |
1773 (VDO_SVDM_VERS(svdm_version));
1777 /* Informing the alternate mode drivers about everything */
1778 *adev_action = ADEV_QUEUE_VDM;
1782 static void tcpm_pd_handle_msg(struct tcpm_port *port,
1783 enum pd_msg_request message,
1786 static void tcpm_handle_vdm_request(struct tcpm_port *port,
1787 const __le32 *payload, int cnt)
1789 enum adev_actions adev_action = ADEV_NONE;
1790 struct typec_altmode *adev;
1791 u32 p[PD_MAX_PAYLOAD];
1792 u32 response[8] = { };
1795 for (i = 0; i < cnt; i++)
1796 p[i] = le32_to_cpu(payload[i]);
1798 adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX,
1799 PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
1801 if (port->vdm_state == VDM_STATE_BUSY) {
1802 /* If UFP responded busy retry after timeout */
1803 if (PD_VDO_CMDT(p[0]) == CMDT_RSP_BUSY) {
1804 port->vdm_state = VDM_STATE_WAIT_RSP_BUSY;
1805 port->vdo_retry = (p[0] & ~VDO_CMDT_MASK) |
1807 mod_vdm_delayed_work(port, PD_T_VDM_BUSY);
1810 port->vdm_state = VDM_STATE_DONE;
1813 if (PD_VDO_SVDM(p[0]) && (adev || tcpm_vdm_ams(port) || port->nr_snk_vdo)) {
1815 * Here a SVDM is received (INIT or RSP or unknown). Set the vdm_sm_running in
1816 * advance because we are dropping the lock but may send VDMs soon.
1817 * For the cases of INIT received:
1818 * - If no response to send, it will be cleared later in this function.
1819 * - If there are responses to send, it will be cleared in the state machine.
1820 * For the cases of RSP received:
1821 * - If no further INIT to send, it will be cleared later in this function.
1822 * - Otherwise, it will be cleared in the state machine if timeout or it will go
1823 * back here until no further INIT to send.
1824 * For the cases of unknown type received:
1825 * - We will send NAK and the flag will be cleared in the state machine.
1827 port->vdm_sm_running = true;
1828 rlen = tcpm_pd_svdm(port, adev, p, cnt, response, &adev_action);
1830 if (port->negotiated_rev >= PD_REV30)
1831 tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
1835 * We are done with any state stored in the port struct now, except
1836 * for any port struct changes done by the tcpm_queue_vdm() call
1837 * below, which is a separate operation.
1839 * So we can safely release the lock here; and we MUST release the
1840 * lock here to avoid an AB BA lock inversion:
1842 * If we keep the lock here then the lock ordering in this path is:
1843 * 1. tcpm_pd_rx_handler take the tcpm port lock
1844 * 2. One of the typec_altmode_* calls below takes the alt-mode's lock
1846 * And we also have this ordering:
1847 * 1. alt-mode driver takes the alt-mode's lock
1848 * 2. alt-mode driver calls tcpm_altmode_enter which takes the
1851 * Dropping our lock here avoids this.
1853 mutex_unlock(&port->lock);
1856 switch (adev_action) {
1859 case ADEV_NOTIFY_USB_AND_QUEUE_VDM:
1860 WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB, NULL));
1861 typec_altmode_vdm(adev, p[0], &p[1], cnt);
1863 case ADEV_QUEUE_VDM:
1864 typec_altmode_vdm(adev, p[0], &p[1], cnt);
1866 case ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL:
1867 if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
1868 int svdm_version = typec_get_negotiated_svdm_version(
1870 if (svdm_version < 0)
1873 response[0] = VDO(adev->svid, 1, svdm_version,
1875 response[0] |= VDO_OPOS(adev->mode);
1879 case ADEV_ATTENTION:
1880 typec_altmode_attention(adev, p[1]);
1886 * We must re-take the lock here to balance the unlock in
1887 * tcpm_pd_rx_handler, note that no changes, other then the
1888 * tcpm_queue_vdm call, are made while the lock is held again.
1889 * All that is done after the call is unwinding the call stack until
1890 * we return to tcpm_pd_rx_handler and do the unlock there.
1892 mutex_lock(&port->lock);
1895 tcpm_queue_vdm(port, response[0], &response[1], rlen - 1);
1897 port->vdm_sm_running = false;
1900 static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd,
1901 const u32 *data, int count)
1903 int svdm_version = typec_get_negotiated_svdm_version(port->typec_port);
1906 if (svdm_version < 0)
1909 if (WARN_ON(count > VDO_MAX_SIZE - 1))
1910 count = VDO_MAX_SIZE - 1;
1912 /* set VDM header with VID & CMD */
1913 header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ?
1914 1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION),
1916 tcpm_queue_vdm(port, header, data, count);
1919 static unsigned int vdm_ready_timeout(u32 vdm_hdr)
1921 unsigned int timeout;
1922 int cmd = PD_VDO_CMD(vdm_hdr);
1924 /* its not a structured VDM command */
1925 if (!PD_VDO_SVDM(vdm_hdr))
1926 return PD_T_VDM_UNSTRUCTURED;
1928 switch (PD_VDO_CMDT(vdm_hdr)) {
1930 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1931 timeout = PD_T_VDM_WAIT_MODE_E;
1933 timeout = PD_T_VDM_SNDR_RSP;
1936 if (cmd == CMD_ENTER_MODE || cmd == CMD_EXIT_MODE)
1937 timeout = PD_T_VDM_E_MODE;
1939 timeout = PD_T_VDM_RCVR_RSP;
1945 static void vdm_run_state_machine(struct tcpm_port *port)
1947 struct pd_message msg;
1949 u32 vdo_hdr = port->vdo_data[0];
1951 switch (port->vdm_state) {
1952 case VDM_STATE_READY:
1953 /* Only transmit VDM if attached */
1954 if (!port->attached) {
1955 port->vdm_state = VDM_STATE_ERR_BUSY;
1960 * if there's traffic or we're not in PDO ready state don't send
1963 if (port->state != SRC_READY && port->state != SNK_READY) {
1964 port->vdm_sm_running = false;
1968 /* TODO: AMS operation for Unstructured VDM */
1969 if (PD_VDO_SVDM(vdo_hdr) && PD_VDO_CMDT(vdo_hdr) == CMDT_INIT) {
1970 switch (PD_VDO_CMD(vdo_hdr)) {
1971 case CMD_DISCOVER_IDENT:
1972 res = tcpm_ams_start(port, DISCOVER_IDENTITY);
1974 port->send_discover = false;
1975 } else if (res == -EAGAIN) {
1976 port->vdo_data[0] = 0;
1977 mod_send_discover_delayed_work(port,
1978 SEND_DISCOVER_RETRY_MS);
1981 case CMD_DISCOVER_SVID:
1982 res = tcpm_ams_start(port, DISCOVER_SVIDS);
1984 case CMD_DISCOVER_MODES:
1985 res = tcpm_ams_start(port, DISCOVER_MODES);
1987 case CMD_ENTER_MODE:
1988 res = tcpm_ams_start(port, DFP_TO_UFP_ENTER_MODE);
1991 res = tcpm_ams_start(port, DFP_TO_UFP_EXIT_MODE);
1994 res = tcpm_ams_start(port, ATTENTION);
1996 case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15):
1997 res = tcpm_ams_start(port, STRUCTURED_VDMS);
2005 port->vdm_state = VDM_STATE_ERR_BUSY;
2010 port->vdm_state = VDM_STATE_SEND_MESSAGE;
2011 mod_vdm_delayed_work(port, (port->negotiated_rev >= PD_REV30 &&
2012 port->pwr_role == TYPEC_SOURCE &&
2013 PD_VDO_SVDM(vdo_hdr) &&
2014 PD_VDO_CMDT(vdo_hdr) == CMDT_INIT) ?
2017 case VDM_STATE_WAIT_RSP_BUSY:
2018 port->vdo_data[0] = port->vdo_retry;
2019 port->vdo_count = 1;
2020 port->vdm_state = VDM_STATE_READY;
2021 tcpm_ams_finish(port);
2023 case VDM_STATE_BUSY:
2024 port->vdm_state = VDM_STATE_ERR_TMOUT;
2025 if (port->ams != NONE_AMS)
2026 tcpm_ams_finish(port);
2028 case VDM_STATE_ERR_SEND:
2030 * A partner which does not support USB PD will not reply,
2031 * so this is not a fatal error. At the same time, some
2032 * devices may not return GoodCRC under some circumstances,
2033 * so we need to retry.
2035 if (port->vdm_retries < 3) {
2036 tcpm_log(port, "VDM Tx error, retry");
2037 port->vdm_retries++;
2038 port->vdm_state = VDM_STATE_READY;
2039 if (PD_VDO_SVDM(vdo_hdr) && PD_VDO_CMDT(vdo_hdr) == CMDT_INIT)
2040 tcpm_ams_finish(port);
2042 tcpm_ams_finish(port);
2045 case VDM_STATE_SEND_MESSAGE:
2046 /* Prepare and send VDM */
2047 memset(&msg, 0, sizeof(msg));
2048 msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF,
2051 port->negotiated_rev,
2052 port->message_id, port->vdo_count);
2053 for (i = 0; i < port->vdo_count; i++)
2054 msg.payload[i] = cpu_to_le32(port->vdo_data[i]);
2055 res = tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
2057 port->vdm_state = VDM_STATE_ERR_SEND;
2059 unsigned long timeout;
2061 port->vdm_retries = 0;
2062 port->vdo_data[0] = 0;
2063 port->vdm_state = VDM_STATE_BUSY;
2064 timeout = vdm_ready_timeout(vdo_hdr);
2065 mod_vdm_delayed_work(port, timeout);
2073 static void vdm_state_machine_work(struct kthread_work *work)
2075 struct tcpm_port *port = container_of(work, struct tcpm_port, vdm_state_machine);
2076 enum vdm_states prev_state;
2078 mutex_lock(&port->lock);
2081 * Continue running as long as the port is not busy and there was
2085 prev_state = port->vdm_state;
2086 vdm_run_state_machine(port);
2087 } while (port->vdm_state != prev_state &&
2088 port->vdm_state != VDM_STATE_BUSY &&
2089 port->vdm_state != VDM_STATE_SEND_MESSAGE);
2091 if (port->vdm_state < VDM_STATE_READY)
2092 port->vdm_sm_running = false;
2094 mutex_unlock(&port->lock);
2100 PDO_ERR_VSAFE5V_NOT_FIRST,
2101 PDO_ERR_PDO_TYPE_NOT_IN_ORDER,
2102 PDO_ERR_FIXED_NOT_SORTED,
2103 PDO_ERR_VARIABLE_BATT_NOT_SORTED,
2105 PDO_ERR_PPS_APDO_NOT_SORTED,
2106 PDO_ERR_DUPE_PPS_APDO,
2109 static const char * const pdo_err_msg[] = {
2110 [PDO_ERR_NO_VSAFE5V] =
2111 " err: source/sink caps should at least have vSafe5V",
2112 [PDO_ERR_VSAFE5V_NOT_FIRST] =
2113 " err: vSafe5V Fixed Supply Object Shall always be the first object",
2114 [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] =
2115 " err: PDOs should be in the following order: Fixed; Battery; Variable",
2116 [PDO_ERR_FIXED_NOT_SORTED] =
2117 " err: Fixed supply pdos should be in increasing order of their fixed voltage",
2118 [PDO_ERR_VARIABLE_BATT_NOT_SORTED] =
2119 " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage",
2120 [PDO_ERR_DUPE_PDO] =
2121 " err: Variable/Batt supply pdos cannot have same min/max voltage",
2122 [PDO_ERR_PPS_APDO_NOT_SORTED] =
2123 " err: Programmable power supply apdos should be in increasing order of their maximum voltage",
2124 [PDO_ERR_DUPE_PPS_APDO] =
2125 " err: Programmable power supply apdos cannot have same min/max voltage and max current",
2128 static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo,
2129 unsigned int nr_pdo)
2133 /* Should at least contain vSafe5v */
2135 return PDO_ERR_NO_VSAFE5V;
2137 /* The vSafe5V Fixed Supply Object Shall always be the first object */
2138 if (pdo_type(pdo[0]) != PDO_TYPE_FIXED ||
2139 pdo_fixed_voltage(pdo[0]) != VSAFE5V)
2140 return PDO_ERR_VSAFE5V_NOT_FIRST;
2142 for (i = 1; i < nr_pdo; i++) {
2143 if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) {
2144 return PDO_ERR_PDO_TYPE_NOT_IN_ORDER;
2145 } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) {
2146 enum pd_pdo_type type = pdo_type(pdo[i]);
2150 * The remaining Fixed Supply Objects, if
2151 * present, shall be sent in voltage order;
2152 * lowest to highest.
2154 case PDO_TYPE_FIXED:
2155 if (pdo_fixed_voltage(pdo[i]) <=
2156 pdo_fixed_voltage(pdo[i - 1]))
2157 return PDO_ERR_FIXED_NOT_SORTED;
2160 * The Battery Supply Objects and Variable
2161 * supply, if present shall be sent in Minimum
2162 * Voltage order; lowest to highest.
2166 if (pdo_min_voltage(pdo[i]) <
2167 pdo_min_voltage(pdo[i - 1]))
2168 return PDO_ERR_VARIABLE_BATT_NOT_SORTED;
2169 else if ((pdo_min_voltage(pdo[i]) ==
2170 pdo_min_voltage(pdo[i - 1])) &&
2171 (pdo_max_voltage(pdo[i]) ==
2172 pdo_max_voltage(pdo[i - 1])))
2173 return PDO_ERR_DUPE_PDO;
2176 * The Programmable Power Supply APDOs, if present,
2177 * shall be sent in Maximum Voltage order;
2178 * lowest to highest.
2181 if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS)
2184 if (pdo_pps_apdo_max_voltage(pdo[i]) <
2185 pdo_pps_apdo_max_voltage(pdo[i - 1]))
2186 return PDO_ERR_PPS_APDO_NOT_SORTED;
2187 else if (pdo_pps_apdo_min_voltage(pdo[i]) ==
2188 pdo_pps_apdo_min_voltage(pdo[i - 1]) &&
2189 pdo_pps_apdo_max_voltage(pdo[i]) ==
2190 pdo_pps_apdo_max_voltage(pdo[i - 1]) &&
2191 pdo_pps_apdo_max_current(pdo[i]) ==
2192 pdo_pps_apdo_max_current(pdo[i - 1]))
2193 return PDO_ERR_DUPE_PPS_APDO;
2196 tcpm_log_force(port, " Unknown pdo type");
2204 static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo,
2205 unsigned int nr_pdo)
2207 enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo);
2209 if (err_index != PDO_NO_ERR) {
2210 tcpm_log_force(port, " %s", pdo_err_msg[err_index]);
2217 static int tcpm_altmode_enter(struct typec_altmode *altmode, u32 *vdo)
2219 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
2223 svdm_version = typec_get_negotiated_svdm_version(port->typec_port);
2224 if (svdm_version < 0)
2225 return svdm_version;
2227 header = VDO(altmode->svid, vdo ? 2 : 1, svdm_version, CMD_ENTER_MODE);
2228 header |= VDO_OPOS(altmode->mode);
2230 tcpm_queue_vdm_unlocked(port, header, vdo, vdo ? 1 : 0);
2234 static int tcpm_altmode_exit(struct typec_altmode *altmode)
2236 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
2240 svdm_version = typec_get_negotiated_svdm_version(port->typec_port);
2241 if (svdm_version < 0)
2242 return svdm_version;
2244 header = VDO(altmode->svid, 1, svdm_version, CMD_EXIT_MODE);
2245 header |= VDO_OPOS(altmode->mode);
2247 tcpm_queue_vdm_unlocked(port, header, NULL, 0);
2251 static int tcpm_altmode_vdm(struct typec_altmode *altmode,
2252 u32 header, const u32 *data, int count)
2254 struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
2256 tcpm_queue_vdm_unlocked(port, header, data, count - 1);
2261 static const struct typec_altmode_ops tcpm_altmode_ops = {
2262 .enter = tcpm_altmode_enter,
2263 .exit = tcpm_altmode_exit,
2264 .vdm = tcpm_altmode_vdm,
2268 * PD (data, control) command handling functions
2270 static inline enum tcpm_state ready_state(struct tcpm_port *port)
2272 if (port->pwr_role == TYPEC_SOURCE)
2278 static int tcpm_pd_send_control(struct tcpm_port *port,
2279 enum pd_ctrl_msg_type type);
2281 static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload,
2284 u32 p0 = le32_to_cpu(payload[0]);
2285 unsigned int type = usb_pd_ado_type(p0);
2288 tcpm_log(port, "Alert message received with no type");
2289 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
2293 /* Just handling non-battery alerts for now */
2294 if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) {
2295 if (port->pwr_role == TYPEC_SOURCE) {
2296 port->upcoming_state = GET_STATUS_SEND;
2297 tcpm_ams_start(port, GETTING_SOURCE_SINK_STATUS);
2300 * Do not check SinkTxOk here in case the Source doesn't set its Rp to
2303 port->ams = GETTING_SOURCE_SINK_STATUS;
2304 tcpm_set_state(port, GET_STATUS_SEND, 0);
2307 tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
2311 static int tcpm_set_auto_vbus_discharge_threshold(struct tcpm_port *port,
2312 enum typec_pwr_opmode mode, bool pps_active,
2313 u32 requested_vbus_voltage)
2317 if (!port->tcpc->set_auto_vbus_discharge_threshold)
2320 ret = port->tcpc->set_auto_vbus_discharge_threshold(port->tcpc, mode, pps_active,
2321 requested_vbus_voltage);
2322 tcpm_log_force(port,
2323 "set_auto_vbus_discharge_threshold mode:%d pps_active:%c vbus:%u ret:%d",
2324 mode, pps_active ? 'y' : 'n', requested_vbus_voltage, ret);
2329 static void tcpm_pd_handle_state(struct tcpm_port *port,
2330 enum tcpm_state state,
2332 unsigned int delay_ms)
2334 switch (port->state) {
2338 tcpm_set_state(port, state, delay_ms);
2340 /* 8.3.3.4.1.1 and 6.8.1 power transitioning */
2341 case SNK_TRANSITION_SINK:
2342 case SNK_TRANSITION_SINK_VBUS:
2343 case SRC_TRANSITION_SUPPLY:
2344 tcpm_set_state(port, HARD_RESET_SEND, 0);
2347 if (!tcpm_ams_interruptible(port)) {
2348 tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ?
2349 SRC_SOFT_RESET_WAIT_SNK_TX :
2353 /* process the Message 6.8.1 */
2354 port->upcoming_state = state;
2355 port->next_ams = ams;
2356 tcpm_set_state(port, ready_state(port), delay_ms);
2362 static void tcpm_pd_handle_msg(struct tcpm_port *port,
2363 enum pd_msg_request message,
2366 switch (port->state) {
2370 tcpm_queue_message(port, message);
2372 /* PD 3.0 Spec 8.3.3.4.1.1 and 6.8.1 */
2373 case SNK_TRANSITION_SINK:
2374 case SNK_TRANSITION_SINK_VBUS:
2375 case SRC_TRANSITION_SUPPLY:
2376 tcpm_set_state(port, HARD_RESET_SEND, 0);
2379 if (!tcpm_ams_interruptible(port)) {
2380 tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ?
2381 SRC_SOFT_RESET_WAIT_SNK_TX :
2385 port->next_ams = ams;
2386 tcpm_set_state(port, ready_state(port), 0);
2387 /* 6.8.1 process the Message */
2388 tcpm_queue_message(port, message);
2394 static int tcpm_register_source_caps(struct tcpm_port *port)
2396 struct usb_power_delivery_desc desc = { port->negotiated_rev };
2397 struct usb_power_delivery_capabilities_desc caps = { };
2398 struct usb_power_delivery_capabilities *cap;
2400 if (!port->partner_pd)
2401 port->partner_pd = usb_power_delivery_register(NULL, &desc);
2402 if (IS_ERR(port->partner_pd))
2403 return PTR_ERR(port->partner_pd);
2405 memcpy(caps.pdo, port->source_caps, sizeof(u32) * port->nr_source_caps);
2406 caps.role = TYPEC_SOURCE;
2408 cap = usb_power_delivery_register_capabilities(port->partner_pd, &caps);
2410 return PTR_ERR(cap);
2412 port->partner_source_caps = cap;
2417 static int tcpm_register_sink_caps(struct tcpm_port *port)
2419 struct usb_power_delivery_desc desc = { port->negotiated_rev };
2420 struct usb_power_delivery_capabilities_desc caps = { };
2421 struct usb_power_delivery_capabilities *cap;
2423 if (!port->partner_pd)
2424 port->partner_pd = usb_power_delivery_register(NULL, &desc);
2425 if (IS_ERR(port->partner_pd))
2426 return PTR_ERR(port->partner_pd);
2428 memcpy(caps.pdo, port->sink_caps, sizeof(u32) * port->nr_sink_caps);
2429 caps.role = TYPEC_SINK;
2431 cap = usb_power_delivery_register_capabilities(port->partner_pd, &caps);
2433 return PTR_ERR(cap);
2435 port->partner_sink_caps = cap;
2440 static void tcpm_pd_data_request(struct tcpm_port *port,
2441 const struct pd_message *msg)
2443 enum pd_data_msg_type type = pd_header_type_le(msg->header);
2444 unsigned int cnt = pd_header_cnt_le(msg->header);
2445 unsigned int rev = pd_header_rev_le(msg->header);
2447 enum frs_typec_current partner_frs_current;
2451 if (tcpm_vdm_ams(port) && type != PD_DATA_VENDOR_DEF) {
2452 port->vdm_state = VDM_STATE_ERR_BUSY;
2453 tcpm_ams_finish(port);
2454 mod_vdm_delayed_work(port, 0);
2458 case PD_DATA_SOURCE_CAP:
2459 for (i = 0; i < cnt; i++)
2460 port->source_caps[i] = le32_to_cpu(msg->payload[i]);
2462 port->nr_source_caps = cnt;
2464 tcpm_log_source_caps(port);
2466 tcpm_validate_caps(port, port->source_caps,
2467 port->nr_source_caps);
2469 tcpm_register_source_caps(port);
2472 * Adjust revision in subsequent message headers, as required,
2473 * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
2474 * support Rev 1.0 so just do nothing in that scenario.
2476 if (rev == PD_REV10) {
2477 if (port->ams == GET_SOURCE_CAPABILITIES)
2478 tcpm_ams_finish(port);
2482 if (rev < PD_MAX_REV)
2483 port->negotiated_rev = rev;
2485 if (port->pwr_role == TYPEC_SOURCE) {
2486 if (port->ams == GET_SOURCE_CAPABILITIES)
2487 tcpm_pd_handle_state(port, SRC_READY, NONE_AMS, 0);
2488 /* Unexpected Source Capabilities */
2490 tcpm_pd_handle_msg(port,
2491 port->negotiated_rev < PD_REV30 ?
2492 PD_MSG_CTRL_REJECT :
2493 PD_MSG_CTRL_NOT_SUPP,
2495 } else if (port->state == SNK_WAIT_CAPABILITIES) {
2497 * This message may be received even if VBUS is not
2498 * present. This is quite unexpected; see USB PD
2499 * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2.
2500 * However, at the same time, we must be ready to
2501 * receive this message and respond to it 15ms after
2502 * receiving PS_RDY during power swap operations, no matter
2503 * if VBUS is available or not (USB PD specification,
2505 * So we need to accept the message either way,
2506 * but be prepared to keep waiting for VBUS after it was
2509 port->ams = POWER_NEGOTIATION;
2510 port->in_ams = true;
2511 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
2513 if (port->ams == GET_SOURCE_CAPABILITIES)
2514 tcpm_ams_finish(port);
2515 tcpm_pd_handle_state(port, SNK_NEGOTIATE_CAPABILITIES,
2516 POWER_NEGOTIATION, 0);
2519 case PD_DATA_REQUEST:
2521 * Adjust revision in subsequent message headers, as required,
2522 * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
2523 * support Rev 1.0 so just reject in that scenario.
2525 if (rev == PD_REV10) {
2526 tcpm_pd_handle_msg(port,
2527 port->negotiated_rev < PD_REV30 ?
2528 PD_MSG_CTRL_REJECT :
2529 PD_MSG_CTRL_NOT_SUPP,
2534 if (rev < PD_MAX_REV)
2535 port->negotiated_rev = rev;
2537 if (port->pwr_role != TYPEC_SOURCE || cnt != 1) {
2538 tcpm_pd_handle_msg(port,
2539 port->negotiated_rev < PD_REV30 ?
2540 PD_MSG_CTRL_REJECT :
2541 PD_MSG_CTRL_NOT_SUPP,
2546 port->sink_request = le32_to_cpu(msg->payload[0]);
2548 if (port->vdm_sm_running && port->explicit_contract) {
2549 tcpm_pd_handle_msg(port, PD_MSG_CTRL_WAIT, port->ams);
2553 if (port->state == SRC_SEND_CAPABILITIES)
2554 tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0);
2556 tcpm_pd_handle_state(port, SRC_NEGOTIATE_CAPABILITIES,
2557 POWER_NEGOTIATION, 0);
2559 case PD_DATA_SINK_CAP:
2560 /* We don't do anything with this at the moment... */
2561 for (i = 0; i < cnt; i++)
2562 port->sink_caps[i] = le32_to_cpu(msg->payload[i]);
2564 partner_frs_current = (port->sink_caps[0] & PDO_FIXED_FRS_CURR_MASK) >>
2565 PDO_FIXED_FRS_CURR_SHIFT;
2566 frs_enable = partner_frs_current && (partner_frs_current <=
2567 port->new_source_frs_current);
2569 "Port partner FRS capable partner_frs_current:%u port_frs_current:%u enable:%c",
2570 partner_frs_current, port->new_source_frs_current, frs_enable ? 'y' : 'n');
2572 ret = port->tcpc->enable_frs(port->tcpc, true);
2573 tcpm_log(port, "Enable FRS %s, ret:%d\n", ret ? "fail" : "success", ret);
2576 port->nr_sink_caps = cnt;
2577 port->sink_cap_done = true;
2578 tcpm_register_sink_caps(port);
2580 if (port->ams == GET_SINK_CAPABILITIES)
2581 tcpm_set_state(port, ready_state(port), 0);
2582 /* Unexpected Sink Capabilities */
2584 tcpm_pd_handle_msg(port,
2585 port->negotiated_rev < PD_REV30 ?
2586 PD_MSG_CTRL_REJECT :
2587 PD_MSG_CTRL_NOT_SUPP,
2590 case PD_DATA_VENDOR_DEF:
2591 tcpm_handle_vdm_request(port, msg->payload, cnt);
2594 port->bist_request = le32_to_cpu(msg->payload[0]);
2595 tcpm_pd_handle_state(port, BIST_RX, BIST, 0);
2598 if (port->state != SRC_READY && port->state != SNK_READY)
2599 tcpm_pd_handle_state(port, port->pwr_role == TYPEC_SOURCE ?
2600 SRC_SOFT_RESET_WAIT_SNK_TX : SNK_SOFT_RESET,
2603 tcpm_handle_alert(port, msg->payload, cnt);
2605 case PD_DATA_BATT_STATUS:
2606 case PD_DATA_GET_COUNTRY_INFO:
2607 /* Currently unsupported */
2608 tcpm_pd_handle_msg(port, port->negotiated_rev < PD_REV30 ?
2609 PD_MSG_CTRL_REJECT :
2610 PD_MSG_CTRL_NOT_SUPP,
2614 tcpm_pd_handle_msg(port, port->negotiated_rev < PD_REV30 ?
2615 PD_MSG_CTRL_REJECT :
2616 PD_MSG_CTRL_NOT_SUPP,
2618 tcpm_log(port, "Unrecognized data message type %#x", type);
2623 static void tcpm_pps_complete(struct tcpm_port *port, int result)
2625 if (port->pps_pending) {
2626 port->pps_status = result;
2627 port->pps_pending = false;
2628 complete(&port->pps_complete);
2632 static void tcpm_pd_ctrl_request(struct tcpm_port *port,
2633 const struct pd_message *msg)
2635 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
2636 enum tcpm_state next_state;
2639 * Stop VDM state machine if interrupted by other Messages while NOT_SUPP is allowed in
2640 * VDM AMS if waiting for VDM responses and will be handled later.
2642 if (tcpm_vdm_ams(port) && type != PD_CTRL_NOT_SUPP && type != PD_CTRL_GOOD_CRC) {
2643 port->vdm_state = VDM_STATE_ERR_BUSY;
2644 tcpm_ams_finish(port);
2645 mod_vdm_delayed_work(port, 0);
2649 case PD_CTRL_GOOD_CRC:
2652 case PD_CTRL_GET_SOURCE_CAP:
2653 tcpm_pd_handle_msg(port, PD_MSG_DATA_SOURCE_CAP, GET_SOURCE_CAPABILITIES);
2655 case PD_CTRL_GET_SINK_CAP:
2656 tcpm_pd_handle_msg(port, PD_MSG_DATA_SINK_CAP, GET_SINK_CAPABILITIES);
2658 case PD_CTRL_GOTO_MIN:
2660 case PD_CTRL_PS_RDY:
2661 switch (port->state) {
2662 case SNK_TRANSITION_SINK:
2663 if (port->vbus_present) {
2664 tcpm_set_current_limit(port,
2665 port->req_current_limit,
2666 port->req_supply_voltage);
2667 port->explicit_contract = true;
2668 tcpm_set_auto_vbus_discharge_threshold(port,
2670 port->pps_data.active,
2671 port->supply_voltage);
2672 tcpm_set_state(port, SNK_READY, 0);
2675 * Seen after power swap. Keep waiting for VBUS
2676 * in a transitional state.
2678 tcpm_set_state(port,
2679 SNK_TRANSITION_SINK_VBUS, 0);
2682 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
2683 tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0);
2685 case PR_SWAP_SNK_SRC_SINK_OFF:
2686 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0);
2688 case VCONN_SWAP_WAIT_FOR_VCONN:
2689 tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0);
2691 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
2692 tcpm_set_state(port, FR_SWAP_SNK_SRC_NEW_SINK_READY, 0);
2695 tcpm_pd_handle_state(port,
2696 port->pwr_role == TYPEC_SOURCE ?
2697 SRC_SOFT_RESET_WAIT_SNK_TX :
2703 case PD_CTRL_REJECT:
2705 case PD_CTRL_NOT_SUPP:
2706 switch (port->state) {
2707 case SNK_NEGOTIATE_CAPABILITIES:
2708 /* USB PD specification, Figure 8-43 */
2709 if (port->explicit_contract)
2710 next_state = SNK_READY;
2712 next_state = SNK_WAIT_CAPABILITIES;
2714 /* Threshold was relaxed before sending Request. Restore it back. */
2715 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD,
2716 port->pps_data.active,
2717 port->supply_voltage);
2718 tcpm_set_state(port, next_state, 0);
2720 case SNK_NEGOTIATE_PPS_CAPABILITIES:
2721 /* Revert data back from any requested PPS updates */
2722 port->pps_data.req_out_volt = port->supply_voltage;
2723 port->pps_data.req_op_curr = port->current_limit;
2724 port->pps_status = (type == PD_CTRL_WAIT ?
2725 -EAGAIN : -EOPNOTSUPP);
2727 /* Threshold was relaxed before sending Request. Restore it back. */
2728 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD,
2729 port->pps_data.active,
2730 port->supply_voltage);
2732 tcpm_set_state(port, SNK_READY, 0);
2735 port->swap_status = (type == PD_CTRL_WAIT ?
2736 -EAGAIN : -EOPNOTSUPP);
2737 tcpm_set_state(port, DR_SWAP_CANCEL, 0);
2740 port->swap_status = (type == PD_CTRL_WAIT ?
2741 -EAGAIN : -EOPNOTSUPP);
2742 tcpm_set_state(port, PR_SWAP_CANCEL, 0);
2744 case VCONN_SWAP_SEND:
2745 port->swap_status = (type == PD_CTRL_WAIT ?
2746 -EAGAIN : -EOPNOTSUPP);
2747 tcpm_set_state(port, VCONN_SWAP_CANCEL, 0);
2750 tcpm_set_state(port, FR_SWAP_CANCEL, 0);
2753 port->sink_cap_done = true;
2754 tcpm_set_state(port, ready_state(port), 0);
2758 if (port->vdm_state > VDM_STATE_READY) {
2759 port->vdm_state = VDM_STATE_DONE;
2760 if (tcpm_vdm_ams(port))
2761 tcpm_ams_finish(port);
2762 mod_vdm_delayed_work(port, 0);
2767 tcpm_pd_handle_state(port,
2768 port->pwr_role == TYPEC_SOURCE ?
2769 SRC_SOFT_RESET_WAIT_SNK_TX :
2775 case PD_CTRL_ACCEPT:
2776 switch (port->state) {
2777 case SNK_NEGOTIATE_CAPABILITIES:
2778 port->pps_data.active = false;
2779 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
2781 case SNK_NEGOTIATE_PPS_CAPABILITIES:
2782 port->pps_data.active = true;
2783 port->pps_data.min_volt = port->pps_data.req_min_volt;
2784 port->pps_data.max_volt = port->pps_data.req_max_volt;
2785 port->pps_data.max_curr = port->pps_data.req_max_curr;
2786 port->req_supply_voltage = port->pps_data.req_out_volt;
2787 port->req_current_limit = port->pps_data.req_op_curr;
2788 power_supply_changed(port->psy);
2789 tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
2791 case SOFT_RESET_SEND:
2792 if (port->ams == SOFT_RESET_AMS)
2793 tcpm_ams_finish(port);
2794 if (port->pwr_role == TYPEC_SOURCE) {
2795 port->upcoming_state = SRC_SEND_CAPABILITIES;
2796 tcpm_ams_start(port, POWER_NEGOTIATION);
2798 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
2802 tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0);
2805 tcpm_set_state(port, PR_SWAP_START, 0);
2807 case VCONN_SWAP_SEND:
2808 tcpm_set_state(port, VCONN_SWAP_START, 0);
2811 tcpm_set_state(port, FR_SWAP_SNK_SRC_TRANSITION_TO_OFF, 0);
2814 tcpm_pd_handle_state(port,
2815 port->pwr_role == TYPEC_SOURCE ?
2816 SRC_SOFT_RESET_WAIT_SNK_TX :
2822 case PD_CTRL_SOFT_RESET:
2823 port->ams = SOFT_RESET_AMS;
2824 tcpm_set_state(port, SOFT_RESET, 0);
2826 case PD_CTRL_DR_SWAP:
2829 * 6.3.9: If an alternate mode is active, a request to swap
2830 * alternate modes shall trigger a port reset.
2832 if (port->typec_caps.data != TYPEC_PORT_DRD) {
2833 tcpm_pd_handle_msg(port,
2834 port->negotiated_rev < PD_REV30 ?
2835 PD_MSG_CTRL_REJECT :
2836 PD_MSG_CTRL_NOT_SUPP,
2839 if (port->send_discover) {
2840 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
2844 tcpm_pd_handle_state(port, DR_SWAP_ACCEPT, DATA_ROLE_SWAP, 0);
2847 case PD_CTRL_PR_SWAP:
2848 if (port->port_type != TYPEC_PORT_DRP) {
2849 tcpm_pd_handle_msg(port,
2850 port->negotiated_rev < PD_REV30 ?
2851 PD_MSG_CTRL_REJECT :
2852 PD_MSG_CTRL_NOT_SUPP,
2855 if (port->send_discover) {
2856 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
2860 tcpm_pd_handle_state(port, PR_SWAP_ACCEPT, POWER_ROLE_SWAP, 0);
2863 case PD_CTRL_VCONN_SWAP:
2864 if (port->send_discover) {
2865 tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
2869 tcpm_pd_handle_state(port, VCONN_SWAP_ACCEPT, VCONN_SWAP, 0);
2871 case PD_CTRL_GET_SOURCE_CAP_EXT:
2872 case PD_CTRL_GET_STATUS:
2873 case PD_CTRL_FR_SWAP:
2874 case PD_CTRL_GET_PPS_STATUS:
2875 case PD_CTRL_GET_COUNTRY_CODES:
2876 /* Currently not supported */
2877 tcpm_pd_handle_msg(port,
2878 port->negotiated_rev < PD_REV30 ?
2879 PD_MSG_CTRL_REJECT :
2880 PD_MSG_CTRL_NOT_SUPP,
2884 tcpm_pd_handle_msg(port,
2885 port->negotiated_rev < PD_REV30 ?
2886 PD_MSG_CTRL_REJECT :
2887 PD_MSG_CTRL_NOT_SUPP,
2889 tcpm_log(port, "Unrecognized ctrl message type %#x", type);
2894 static void tcpm_pd_ext_msg_request(struct tcpm_port *port,
2895 const struct pd_message *msg)
2897 enum pd_ext_msg_type type = pd_header_type_le(msg->header);
2898 unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header);
2900 /* stopping VDM state machine if interrupted by other Messages */
2901 if (tcpm_vdm_ams(port)) {
2902 port->vdm_state = VDM_STATE_ERR_BUSY;
2903 tcpm_ams_finish(port);
2904 mod_vdm_delayed_work(port, 0);
2907 if (!(le16_to_cpu(msg->ext_msg.header) & PD_EXT_HDR_CHUNKED)) {
2908 tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
2909 tcpm_log(port, "Unchunked extended messages unsupported");
2913 if (data_size > PD_EXT_MAX_CHUNK_DATA) {
2914 tcpm_pd_handle_state(port, CHUNK_NOT_SUPP, NONE_AMS, PD_T_CHUNK_NOT_SUPP);
2915 tcpm_log(port, "Chunk handling not yet supported");
2921 case PD_EXT_PPS_STATUS:
2922 if (port->ams == GETTING_SOURCE_SINK_STATUS) {
2923 tcpm_ams_finish(port);
2924 tcpm_set_state(port, ready_state(port), 0);
2926 /* unexpected Status or PPS_Status Message */
2927 tcpm_pd_handle_state(port, port->pwr_role == TYPEC_SOURCE ?
2928 SRC_SOFT_RESET_WAIT_SNK_TX : SNK_SOFT_RESET,
2932 case PD_EXT_SOURCE_CAP_EXT:
2933 case PD_EXT_GET_BATT_CAP:
2934 case PD_EXT_GET_BATT_STATUS:
2935 case PD_EXT_BATT_CAP:
2936 case PD_EXT_GET_MANUFACTURER_INFO:
2937 case PD_EXT_MANUFACTURER_INFO:
2938 case PD_EXT_SECURITY_REQUEST:
2939 case PD_EXT_SECURITY_RESPONSE:
2940 case PD_EXT_FW_UPDATE_REQUEST:
2941 case PD_EXT_FW_UPDATE_RESPONSE:
2942 case PD_EXT_COUNTRY_INFO:
2943 case PD_EXT_COUNTRY_CODES:
2944 tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
2947 tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
2948 tcpm_log(port, "Unrecognized extended message type %#x", type);
2953 static void tcpm_pd_rx_handler(struct kthread_work *work)
2955 struct pd_rx_event *event = container_of(work,
2956 struct pd_rx_event, work);
2957 const struct pd_message *msg = &event->msg;
2958 unsigned int cnt = pd_header_cnt_le(msg->header);
2959 struct tcpm_port *port = event->port;
2961 mutex_lock(&port->lock);
2963 tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header),
2966 if (port->attached) {
2967 enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
2968 unsigned int msgid = pd_header_msgid_le(msg->header);
2971 * USB PD standard, 6.6.1.2:
2972 * "... if MessageID value in a received Message is the
2973 * same as the stored value, the receiver shall return a
2974 * GoodCRC Message with that MessageID value and drop
2975 * the Message (this is a retry of an already received
2976 * Message). Note: this shall not apply to the Soft_Reset
2977 * Message which always has a MessageID value of zero."
2979 if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET)
2981 port->rx_msgid = msgid;
2984 * If both ends believe to be DFP/host, we have a data role
2987 if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) ==
2988 (port->data_role == TYPEC_HOST)) {
2990 "Data role mismatch, initiating error recovery");
2991 tcpm_set_state(port, ERROR_RECOVERY, 0);
2993 if (le16_to_cpu(msg->header) & PD_HEADER_EXT_HDR)
2994 tcpm_pd_ext_msg_request(port, msg);
2996 tcpm_pd_data_request(port, msg);
2998 tcpm_pd_ctrl_request(port, msg);
3003 mutex_unlock(&port->lock);
3007 void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg)
3009 struct pd_rx_event *event;
3011 event = kzalloc(sizeof(*event), GFP_ATOMIC);
3015 kthread_init_work(&event->work, tcpm_pd_rx_handler);
3017 memcpy(&event->msg, msg, sizeof(*msg));
3018 kthread_queue_work(port->wq, &event->work);
3020 EXPORT_SYMBOL_GPL(tcpm_pd_receive);
3022 static int tcpm_pd_send_control(struct tcpm_port *port,
3023 enum pd_ctrl_msg_type type)
3025 struct pd_message msg;
3027 memset(&msg, 0, sizeof(msg));
3028 msg.header = PD_HEADER_LE(type, port->pwr_role,
3030 port->negotiated_rev,
3031 port->message_id, 0);
3033 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
3037 * Send queued message without affecting state.
3038 * Return true if state machine should go back to sleep,
3041 static bool tcpm_send_queued_message(struct tcpm_port *port)
3043 enum pd_msg_request queued_message;
3047 queued_message = port->queued_message;
3048 port->queued_message = PD_MSG_NONE;
3050 switch (queued_message) {
3051 case PD_MSG_CTRL_WAIT:
3052 tcpm_pd_send_control(port, PD_CTRL_WAIT);
3054 case PD_MSG_CTRL_REJECT:
3055 tcpm_pd_send_control(port, PD_CTRL_REJECT);
3057 case PD_MSG_CTRL_NOT_SUPP:
3058 tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP);
3060 case PD_MSG_DATA_SINK_CAP:
3061 ret = tcpm_pd_send_sink_caps(port);
3063 tcpm_log(port, "Unable to send snk caps, ret=%d", ret);
3064 tcpm_set_state(port, SNK_SOFT_RESET, 0);
3066 tcpm_ams_finish(port);
3068 case PD_MSG_DATA_SOURCE_CAP:
3069 ret = tcpm_pd_send_source_caps(port);
3072 "Unable to send src caps, ret=%d",
3074 tcpm_set_state(port, SOFT_RESET_SEND, 0);
3075 } else if (port->pwr_role == TYPEC_SOURCE) {
3076 tcpm_ams_finish(port);
3077 tcpm_set_state(port, HARD_RESET_SEND,
3078 PD_T_SENDER_RESPONSE);
3080 tcpm_ams_finish(port);
3086 } while (port->queued_message != PD_MSG_NONE);
3088 if (port->delayed_state != INVALID_STATE) {
3089 if (ktime_after(port->delayed_runtime, ktime_get())) {
3090 mod_tcpm_delayed_work(port, ktime_to_ms(ktime_sub(port->delayed_runtime,
3094 port->delayed_state = INVALID_STATE;
3099 static int tcpm_pd_check_request(struct tcpm_port *port)
3101 u32 pdo, rdo = port->sink_request;
3102 unsigned int max, op, pdo_max, index;
3103 enum pd_pdo_type type;
3105 index = rdo_index(rdo);
3106 if (!index || index > port->nr_src_pdo)
3109 pdo = port->src_pdo[index - 1];
3110 type = pdo_type(pdo);
3112 case PDO_TYPE_FIXED:
3114 max = rdo_max_current(rdo);
3115 op = rdo_op_current(rdo);
3116 pdo_max = pdo_max_current(pdo);
3120 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
3123 if (type == PDO_TYPE_FIXED)
3125 "Requested %u mV, %u mA for %u / %u mA",
3126 pdo_fixed_voltage(pdo), pdo_max, op, max);
3129 "Requested %u -> %u mV, %u mA for %u / %u mA",
3130 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
3134 max = rdo_max_power(rdo);
3135 op = rdo_op_power(rdo);
3136 pdo_max = pdo_max_power(pdo);
3140 if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
3143 "Requested %u -> %u mV, %u mW for %u / %u mW",
3144 pdo_min_voltage(pdo), pdo_max_voltage(pdo),
3151 port->op_vsafe5v = index == 1;
3156 #define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y))
3157 #define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y))
3159 static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo,
3162 unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0,
3163 max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0,
3167 port->pps_data.supported = false;
3168 port->usb_type = POWER_SUPPLY_USB_TYPE_PD;
3169 power_supply_changed(port->psy);
3172 * Select the source PDO providing the most power which has a
3175 for (i = 0; i < port->nr_source_caps; i++) {
3176 u32 pdo = port->source_caps[i];
3177 enum pd_pdo_type type = pdo_type(pdo);
3180 case PDO_TYPE_FIXED:
3181 max_src_mv = pdo_fixed_voltage(pdo);
3182 min_src_mv = max_src_mv;
3186 max_src_mv = pdo_max_voltage(pdo);
3187 min_src_mv = pdo_min_voltage(pdo);
3190 if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) {
3191 port->pps_data.supported = true;
3193 POWER_SUPPLY_USB_TYPE_PD_PPS;
3194 power_supply_changed(port->psy);
3198 tcpm_log(port, "Invalid source PDO type, ignoring");
3203 case PDO_TYPE_FIXED:
3205 src_ma = pdo_max_current(pdo);
3206 src_mw = src_ma * min_src_mv / 1000;
3209 src_mw = pdo_max_power(pdo);
3214 tcpm_log(port, "Invalid source PDO type, ignoring");
3218 for (j = 0; j < port->nr_snk_pdo; j++) {
3219 pdo = port->snk_pdo[j];
3221 switch (pdo_type(pdo)) {
3222 case PDO_TYPE_FIXED:
3223 max_snk_mv = pdo_fixed_voltage(pdo);
3224 min_snk_mv = max_snk_mv;
3228 max_snk_mv = pdo_max_voltage(pdo);
3229 min_snk_mv = pdo_min_voltage(pdo);
3234 tcpm_log(port, "Invalid sink PDO type, ignoring");
3238 if (max_src_mv <= max_snk_mv &&
3239 min_src_mv >= min_snk_mv) {
3240 /* Prefer higher voltages if available */
3241 if ((src_mw == max_mw && min_src_mv > max_mv) ||
3246 max_mv = min_src_mv;
3256 #define min_pps_apdo_current(x, y) \
3257 min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y))
3259 static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port)
3261 unsigned int i, j, max_mw = 0, max_mv = 0;
3262 unsigned int min_src_mv, max_src_mv, src_ma, src_mw;
3263 unsigned int min_snk_mv, max_snk_mv;
3264 unsigned int max_op_mv;
3266 unsigned int src_pdo = 0, snk_pdo = 0;
3269 * Select the source PPS APDO providing the most power while staying
3270 * within the board's limits. We skip the first PDO as this is always
3273 for (i = 1; i < port->nr_source_caps; ++i) {
3274 pdo = port->source_caps[i];
3276 switch (pdo_type(pdo)) {
3278 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
3279 tcpm_log(port, "Not PPS APDO (source), ignoring");
3283 min_src_mv = pdo_pps_apdo_min_voltage(pdo);
3284 max_src_mv = pdo_pps_apdo_max_voltage(pdo);
3285 src_ma = pdo_pps_apdo_max_current(pdo);
3286 src_mw = (src_ma * max_src_mv) / 1000;
3289 * Now search through the sink PDOs to find a matching
3290 * PPS APDO. Again skip the first sink PDO as this will
3293 for (j = 1; j < port->nr_snk_pdo; j++) {
3294 pdo = port->snk_pdo[j];
3296 switch (pdo_type(pdo)) {
3298 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
3300 "Not PPS APDO (sink), ignoring");
3305 pdo_pps_apdo_min_voltage(pdo);
3307 pdo_pps_apdo_max_voltage(pdo);
3311 "Not APDO type (sink), ignoring");
3315 if (min_src_mv <= max_snk_mv &&
3316 max_src_mv >= min_snk_mv) {
3317 max_op_mv = min(max_src_mv, max_snk_mv);
3318 src_mw = (max_op_mv * src_ma) / 1000;
3319 /* Prefer higher voltages if available */
3320 if ((src_mw == max_mw &&
3321 max_op_mv > max_mv) ||
3333 tcpm_log(port, "Not APDO type (source), ignoring");
3339 src = port->source_caps[src_pdo];
3340 snk = port->snk_pdo[snk_pdo];
3342 port->pps_data.req_min_volt = max(pdo_pps_apdo_min_voltage(src),
3343 pdo_pps_apdo_min_voltage(snk));
3344 port->pps_data.req_max_volt = min(pdo_pps_apdo_max_voltage(src),
3345 pdo_pps_apdo_max_voltage(snk));
3346 port->pps_data.req_max_curr = min_pps_apdo_current(src, snk);
3347 port->pps_data.req_out_volt = min(port->pps_data.req_max_volt,
3348 max(port->pps_data.req_min_volt,
3349 port->pps_data.req_out_volt));
3350 port->pps_data.req_op_curr = min(port->pps_data.req_max_curr,
3351 port->pps_data.req_op_curr);
3357 static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo)
3359 unsigned int mv, ma, mw, flags;
3360 unsigned int max_ma, max_mw;
3361 enum pd_pdo_type type;
3362 u32 pdo, matching_snk_pdo;
3363 int src_pdo_index = 0;
3364 int snk_pdo_index = 0;
3367 ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index);
3371 pdo = port->source_caps[src_pdo_index];
3372 matching_snk_pdo = port->snk_pdo[snk_pdo_index];
3373 type = pdo_type(pdo);
3376 case PDO_TYPE_FIXED:
3377 mv = pdo_fixed_voltage(pdo);
3381 mv = pdo_min_voltage(pdo);
3384 tcpm_log(port, "Invalid PDO selected!");
3388 /* Select maximum available current within the sink pdo's limit */
3389 if (type == PDO_TYPE_BATT) {
3390 mw = min_power(pdo, matching_snk_pdo);
3391 ma = 1000 * mw / mv;
3393 ma = min_current(pdo, matching_snk_pdo);
3394 mw = ma * mv / 1000;
3397 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
3399 /* Set mismatch bit if offered power is less than operating power */
3402 if (mw < port->operating_snk_mw) {
3403 flags |= RDO_CAP_MISMATCH;
3404 if (type == PDO_TYPE_BATT &&
3405 (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo)))
3406 max_mw = pdo_max_power(matching_snk_pdo);
3407 else if (pdo_max_current(matching_snk_pdo) >
3408 pdo_max_current(pdo))
3409 max_ma = pdo_max_current(matching_snk_pdo);
3412 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
3413 port->cc_req, port->cc1, port->cc2, port->vbus_source,
3414 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
3417 if (type == PDO_TYPE_BATT) {
3418 *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags);
3420 tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s",
3421 src_pdo_index, mv, mw,
3422 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
3424 *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags);
3426 tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s",
3427 src_pdo_index, mv, ma,
3428 flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
3431 port->req_current_limit = ma;
3432 port->req_supply_voltage = mv;
3437 static int tcpm_pd_send_request(struct tcpm_port *port)
3439 struct pd_message msg;
3443 ret = tcpm_pd_build_request(port, &rdo);
3448 * Relax the threshold as voltage will be adjusted after Accept Message plus tSrcTransition.
3449 * It is safer to modify the threshold here.
3451 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, 0);
3453 memset(&msg, 0, sizeof(msg));
3454 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
3457 port->negotiated_rev,
3458 port->message_id, 1);
3459 msg.payload[0] = cpu_to_le32(rdo);
3461 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
3464 static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo)
3466 unsigned int out_mv, op_ma, op_mw, max_mv, max_ma, flags;
3467 enum pd_pdo_type type;
3468 unsigned int src_pdo_index;
3471 src_pdo_index = tcpm_pd_select_pps_apdo(port);
3475 pdo = port->source_caps[src_pdo_index];
3476 type = pdo_type(pdo);
3480 if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
3481 tcpm_log(port, "Invalid APDO selected!");
3484 max_mv = port->pps_data.req_max_volt;
3485 max_ma = port->pps_data.req_max_curr;
3486 out_mv = port->pps_data.req_out_volt;
3487 op_ma = port->pps_data.req_op_curr;
3490 tcpm_log(port, "Invalid PDO selected!");
3494 flags = RDO_USB_COMM | RDO_NO_SUSPEND;
3496 op_mw = (op_ma * out_mv) / 1000;
3497 if (op_mw < port->operating_snk_mw) {
3499 * Try raising current to meet power needs. If that's not enough
3500 * then try upping the voltage. If that's still not enough
3501 * then we've obviously chosen a PPS APDO which really isn't
3502 * suitable so abandon ship.
3504 op_ma = (port->operating_snk_mw * 1000) / out_mv;
3505 if ((port->operating_snk_mw * 1000) % out_mv)
3507 op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP);
3509 if (op_ma > max_ma) {
3511 out_mv = (port->operating_snk_mw * 1000) / op_ma;
3512 if ((port->operating_snk_mw * 1000) % op_ma)
3514 out_mv += RDO_PROG_VOLT_MV_STEP -
3515 (out_mv % RDO_PROG_VOLT_MV_STEP);
3517 if (out_mv > max_mv) {
3518 tcpm_log(port, "Invalid PPS APDO selected!");
3524 tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
3525 port->cc_req, port->cc1, port->cc2, port->vbus_source,
3526 port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
3529 *rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags);
3531 tcpm_log(port, "Requesting APDO %d: %u mV, %u mA",
3532 src_pdo_index, out_mv, op_ma);
3534 port->pps_data.req_op_curr = op_ma;
3535 port->pps_data.req_out_volt = out_mv;
3540 static int tcpm_pd_send_pps_request(struct tcpm_port *port)
3542 struct pd_message msg;
3546 ret = tcpm_pd_build_pps_request(port, &rdo);
3550 /* Relax the threshold as voltage will be adjusted right after Accept Message. */
3551 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, 0);
3553 memset(&msg, 0, sizeof(msg));
3554 msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
3557 port->negotiated_rev,
3558 port->message_id, 1);
3559 msg.payload[0] = cpu_to_le32(rdo);
3561 return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
3564 static int tcpm_set_vbus(struct tcpm_port *port, bool enable)
3568 if (enable && port->vbus_charge)
3571 tcpm_log(port, "vbus:=%d charge=%d", enable, port->vbus_charge);
3573 ret = port->tcpc->set_vbus(port->tcpc, enable, port->vbus_charge);
3577 port->vbus_source = enable;
3581 static int tcpm_set_charge(struct tcpm_port *port, bool charge)
3585 if (charge && port->vbus_source)
3588 if (charge != port->vbus_charge) {
3589 tcpm_log(port, "vbus=%d charge:=%d", port->vbus_source, charge);
3590 ret = port->tcpc->set_vbus(port->tcpc, port->vbus_source,
3595 port->vbus_charge = charge;
3596 power_supply_changed(port->psy);
3600 static bool tcpm_start_toggling(struct tcpm_port *port, enum typec_cc_status cc)
3604 if (!port->tcpc->start_toggling)
3607 tcpm_log_force(port, "Start toggling");
3608 ret = port->tcpc->start_toggling(port->tcpc, port->port_type, cc);
3612 static int tcpm_init_vbus(struct tcpm_port *port)
3616 ret = port->tcpc->set_vbus(port->tcpc, false, false);
3617 port->vbus_source = false;
3618 port->vbus_charge = false;
3622 static int tcpm_init_vconn(struct tcpm_port *port)
3626 ret = port->tcpc->set_vconn(port->tcpc, false);
3627 port->vconn_role = TYPEC_SINK;
3631 static void tcpm_typec_connect(struct tcpm_port *port)
3633 if (!port->connected) {
3634 /* Make sure we don't report stale identity information */
3635 memset(&port->partner_ident, 0, sizeof(port->partner_ident));
3636 port->partner_desc.usb_pd = port->pd_capable;
3637 if (tcpm_port_is_debug(port))
3638 port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG;
3639 else if (tcpm_port_is_audio(port))
3640 port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO;
3642 port->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
3643 port->partner = typec_register_partner(port->typec_port,
3644 &port->partner_desc);
3645 port->connected = true;
3646 typec_partner_set_usb_power_delivery(port->partner, port->partner_pd);
3650 static int tcpm_src_attach(struct tcpm_port *port)
3652 enum typec_cc_polarity polarity =
3653 port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2
3654 : TYPEC_POLARITY_CC1;
3660 ret = tcpm_set_polarity(port, polarity);
3664 tcpm_enable_auto_vbus_discharge(port, true);
3666 ret = tcpm_set_roles(port, true, TYPEC_SOURCE, tcpm_data_role_for_source(port));
3670 if (port->pd_supported) {
3671 ret = port->tcpc->set_pd_rx(port->tcpc, true);
3673 goto out_disable_mux;
3677 * USB Type-C specification, version 1.2,
3678 * chapter 4.5.2.2.8.1 (Attached.SRC Requirements)
3679 * Enable VCONN only if the non-RD port is set to RA.
3681 if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) ||
3682 (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) {
3683 ret = tcpm_set_vconn(port, true);
3685 goto out_disable_pd;
3688 ret = tcpm_set_vbus(port, true);
3690 goto out_disable_vconn;
3692 port->pd_capable = false;
3694 port->partner = NULL;
3696 port->attached = true;
3697 port->send_discover = true;
3702 tcpm_set_vconn(port, false);
3704 if (port->pd_supported)
3705 port->tcpc->set_pd_rx(port->tcpc, false);
3707 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
3708 TYPEC_ORIENTATION_NONE);
3712 static void tcpm_typec_disconnect(struct tcpm_port *port)
3714 if (port->connected) {
3715 typec_partner_set_usb_power_delivery(port->partner, NULL);
3716 typec_unregister_partner(port->partner);
3717 port->partner = NULL;
3718 port->connected = false;
3722 static void tcpm_unregister_altmodes(struct tcpm_port *port)
3724 struct pd_mode_data *modep = &port->mode_data;
3727 for (i = 0; i < modep->altmodes; i++) {
3728 typec_unregister_altmode(port->partner_altmode[i]);
3729 port->partner_altmode[i] = NULL;
3732 memset(modep, 0, sizeof(*modep));
3735 static void tcpm_set_partner_usb_comm_capable(struct tcpm_port *port, bool capable)
3737 tcpm_log(port, "Setting usb_comm capable %s", capable ? "true" : "false");
3739 if (port->tcpc->set_partner_usb_comm_capable)
3740 port->tcpc->set_partner_usb_comm_capable(port->tcpc, capable);
3743 static void tcpm_reset_port(struct tcpm_port *port)
3745 tcpm_enable_auto_vbus_discharge(port, false);
3746 port->in_ams = false;
3747 port->ams = NONE_AMS;
3748 port->vdm_sm_running = false;
3749 tcpm_unregister_altmodes(port);
3750 tcpm_typec_disconnect(port);
3751 port->attached = false;
3752 port->pd_capable = false;
3753 port->pps_data.supported = false;
3754 tcpm_set_partner_usb_comm_capable(port, false);
3757 * First Rx ID should be 0; set this to a sentinel of -1 so that
3758 * we can check tcpm_pd_rx_handler() if we had seen it before.
3760 port->rx_msgid = -1;
3762 port->tcpc->set_pd_rx(port->tcpc, false);
3763 tcpm_init_vbus(port); /* also disables charging */
3764 tcpm_init_vconn(port);
3765 tcpm_set_current_limit(port, 0, 0);
3766 tcpm_set_polarity(port, TYPEC_POLARITY_CC1);
3767 tcpm_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
3768 TYPEC_ORIENTATION_NONE);
3769 tcpm_set_attached_state(port, false);
3770 port->try_src_count = 0;
3771 port->try_snk_count = 0;
3772 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
3773 power_supply_changed(port->psy);
3774 port->nr_sink_caps = 0;
3775 port->sink_cap_done = false;
3776 if (port->tcpc->enable_frs)
3777 port->tcpc->enable_frs(port->tcpc, false);
3779 usb_power_delivery_unregister_capabilities(port->partner_sink_caps);
3780 port->partner_sink_caps = NULL;
3781 usb_power_delivery_unregister_capabilities(port->partner_source_caps);
3782 port->partner_source_caps = NULL;
3783 usb_power_delivery_unregister(port->partner_pd);
3784 port->partner_pd = NULL;
3787 static void tcpm_detach(struct tcpm_port *port)
3789 if (tcpm_port_is_disconnected(port))
3790 port->hard_reset_count = 0;
3792 if (!port->attached)
3795 if (port->tcpc->set_bist_data) {
3796 tcpm_log(port, "disable BIST MODE TESTDATA");
3797 port->tcpc->set_bist_data(port->tcpc, false);
3800 tcpm_reset_port(port);
3803 static void tcpm_src_detach(struct tcpm_port *port)
3808 static int tcpm_snk_attach(struct tcpm_port *port)
3815 ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ?
3816 TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1);
3820 tcpm_enable_auto_vbus_discharge(port, true);
3822 ret = tcpm_set_roles(port, true, TYPEC_SINK, tcpm_data_role_for_sink(port));
3826 port->pd_capable = false;
3828 port->partner = NULL;
3830 port->attached = true;
3831 port->send_discover = true;
3836 static void tcpm_snk_detach(struct tcpm_port *port)
3841 static int tcpm_acc_attach(struct tcpm_port *port)
3848 ret = tcpm_set_roles(port, true, TYPEC_SOURCE,
3849 tcpm_data_role_for_source(port));
3853 port->partner = NULL;
3855 tcpm_typec_connect(port);
3857 port->attached = true;
3862 static void tcpm_acc_detach(struct tcpm_port *port)
3867 static inline enum tcpm_state hard_reset_state(struct tcpm_port *port)
3869 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)
3870 return HARD_RESET_SEND;
3871 if (port->pd_capable)
3872 return ERROR_RECOVERY;
3873 if (port->pwr_role == TYPEC_SOURCE)
3874 return SRC_UNATTACHED;
3875 if (port->state == SNK_WAIT_CAPABILITIES)
3877 return SNK_UNATTACHED;
3880 static inline enum tcpm_state unattached_state(struct tcpm_port *port)
3882 if (port->port_type == TYPEC_PORT_DRP) {
3883 if (port->pwr_role == TYPEC_SOURCE)
3884 return SRC_UNATTACHED;
3886 return SNK_UNATTACHED;
3887 } else if (port->port_type == TYPEC_PORT_SRC) {
3888 return SRC_UNATTACHED;
3891 return SNK_UNATTACHED;
3894 static void tcpm_swap_complete(struct tcpm_port *port, int result)
3896 if (port->swap_pending) {
3897 port->swap_status = result;
3898 port->swap_pending = false;
3899 port->non_pd_role_swap = false;
3900 complete(&port->swap_complete);
3904 static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc)
3907 case TYPEC_CC_RP_1_5:
3908 return TYPEC_PWR_MODE_1_5A;
3909 case TYPEC_CC_RP_3_0:
3910 return TYPEC_PWR_MODE_3_0A;
3911 case TYPEC_CC_RP_DEF:
3913 return TYPEC_PWR_MODE_USB;
3917 static enum typec_cc_status tcpm_pwr_opmode_to_rp(enum typec_pwr_opmode opmode)
3920 case TYPEC_PWR_MODE_USB:
3921 return TYPEC_CC_RP_DEF;
3922 case TYPEC_PWR_MODE_1_5A:
3923 return TYPEC_CC_RP_1_5;
3924 case TYPEC_PWR_MODE_3_0A:
3925 case TYPEC_PWR_MODE_PD:
3927 return TYPEC_CC_RP_3_0;
3931 static void run_state_machine(struct tcpm_port *port)
3934 enum typec_pwr_opmode opmode;
3936 enum tcpm_state upcoming_state;
3938 if (port->tcpc->check_contaminant && port->state != CHECK_CONTAMINANT)
3939 port->potential_contaminant = ((port->enter_state == SRC_ATTACH_WAIT &&
3940 port->state == SRC_UNATTACHED) ||
3941 (port->enter_state == SNK_ATTACH_WAIT &&
3942 port->state == SNK_UNATTACHED));
3944 port->enter_state = port->state;
3945 switch (port->state) {
3948 case CHECK_CONTAMINANT:
3949 port->tcpc->check_contaminant(port->tcpc);
3952 case SRC_UNATTACHED:
3953 if (!port->non_pd_role_swap)
3954 tcpm_swap_complete(port, -ENOTCONN);
3955 tcpm_src_detach(port);
3956 if (port->potential_contaminant) {
3957 tcpm_set_state(port, CHECK_CONTAMINANT, 0);
3960 if (tcpm_start_toggling(port, tcpm_rp_cc(port))) {
3961 tcpm_set_state(port, TOGGLING, 0);
3964 tcpm_set_cc(port, tcpm_rp_cc(port));
3965 if (port->port_type == TYPEC_PORT_DRP)
3966 tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK);
3968 case SRC_ATTACH_WAIT:
3969 if (tcpm_port_is_debug(port))
3970 tcpm_set_state(port, DEBUG_ACC_ATTACHED,
3972 else if (tcpm_port_is_audio(port))
3973 tcpm_set_state(port, AUDIO_ACC_ATTACHED,
3975 else if (tcpm_port_is_source(port) && port->vbus_vsafe0v)
3976 tcpm_set_state(port,
3977 tcpm_try_snk(port) ? SNK_TRY
3983 port->try_snk_count++;
3986 * - Do not drive vconn or vbus
3987 * - Terminate CC pins (both) to Rd
3989 * - Wait for tDRPTry (PD_T_DRP_TRY).
3990 * Until then, ignore any state changes.
3992 tcpm_set_cc(port, TYPEC_CC_RD);
3993 tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY);
3996 if (tcpm_port_is_sink(port)) {
3997 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0);
3999 tcpm_set_state(port, SRC_TRYWAIT, 0);
4003 case SNK_TRY_WAIT_DEBOUNCE:
4004 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS,
4005 PD_T_TRY_CC_DEBOUNCE);
4007 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
4008 if (port->vbus_present && tcpm_port_is_sink(port))
4009 tcpm_set_state(port, SNK_ATTACHED, 0);
4014 tcpm_set_cc(port, tcpm_rp_cc(port));
4015 if (port->max_wait == 0) {
4016 port->max_wait = jiffies +
4017 msecs_to_jiffies(PD_T_DRP_TRY);
4018 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
4021 if (time_is_after_jiffies(port->max_wait))
4022 tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
4023 jiffies_to_msecs(port->max_wait -
4026 tcpm_set_state(port, SNK_UNATTACHED, 0);
4029 case SRC_TRYWAIT_DEBOUNCE:
4030 tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE);
4032 case SRC_TRYWAIT_UNATTACHED:
4033 tcpm_set_state(port, SNK_UNATTACHED, 0);
4037 ret = tcpm_src_attach(port);
4038 tcpm_set_state(port, SRC_UNATTACHED,
4039 ret < 0 ? 0 : PD_T_PS_SOURCE_ON);
4042 opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port));
4043 typec_set_pwr_opmode(port->typec_port, opmode);
4044 port->pwr_opmode = TYPEC_PWR_MODE_USB;
4045 port->caps_count = 0;
4046 port->negotiated_rev = PD_MAX_REV;
4047 port->message_id = 0;
4048 port->rx_msgid = -1;
4049 port->explicit_contract = false;
4050 /* SNK -> SRC POWER/FAST_ROLE_SWAP finished */
4051 if (port->ams == POWER_ROLE_SWAP ||
4052 port->ams == FAST_ROLE_SWAP)
4053 tcpm_ams_finish(port);
4054 if (!port->pd_supported) {
4055 tcpm_set_state(port, SRC_READY, 0);
4058 port->upcoming_state = SRC_SEND_CAPABILITIES;
4059 tcpm_ams_start(port, POWER_NEGOTIATION);
4061 case SRC_SEND_CAPABILITIES:
4063 if (port->caps_count > PD_N_CAPS_COUNT) {
4064 tcpm_set_state(port, SRC_READY, 0);
4067 ret = tcpm_pd_send_source_caps(port);
4069 tcpm_set_state(port, SRC_SEND_CAPABILITIES,
4070 PD_T_SEND_SOURCE_CAP);
4073 * Per standard, we should clear the reset counter here.
4074 * However, that can result in state machine hang-ups.
4075 * Reset it only in READY state to improve stability.
4077 /* port->hard_reset_count = 0; */
4078 port->caps_count = 0;
4079 port->pd_capable = true;
4080 tcpm_set_state_cond(port, SRC_SEND_CAPABILITIES_TIMEOUT,
4081 PD_T_SEND_SOURCE_CAP);
4084 case SRC_SEND_CAPABILITIES_TIMEOUT:
4086 * Error recovery for a PD_DATA_SOURCE_CAP reply timeout.
4088 * PD 2.0 sinks are supposed to accept src-capabilities with a
4089 * 3.0 header and simply ignore any src PDOs which the sink does
4090 * not understand such as PPS but some 2.0 sinks instead ignore
4091 * the entire PD_DATA_SOURCE_CAP message, causing contract
4092 * negotiation to fail.
4094 * After PD_N_HARD_RESET_COUNT hard-reset attempts, we try
4095 * sending src-capabilities with a lower PD revision to
4096 * make these broken sinks work.
4098 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) {
4099 tcpm_set_state(port, HARD_RESET_SEND, 0);
4100 } else if (port->negotiated_rev > PD_REV20) {
4101 port->negotiated_rev--;
4102 port->hard_reset_count = 0;
4103 tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
4105 tcpm_set_state(port, hard_reset_state(port), 0);
4108 case SRC_NEGOTIATE_CAPABILITIES:
4109 ret = tcpm_pd_check_request(port);
4111 tcpm_pd_send_control(port, PD_CTRL_REJECT);
4112 if (!port->explicit_contract) {
4113 tcpm_set_state(port,
4114 SRC_WAIT_NEW_CAPABILITIES, 0);
4116 tcpm_set_state(port, SRC_READY, 0);
4119 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
4120 tcpm_set_partner_usb_comm_capable(port,
4121 !!(port->sink_request & RDO_USB_COMM));
4122 tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
4123 PD_T_SRC_TRANSITION);
4126 case SRC_TRANSITION_SUPPLY:
4127 /* XXX: regulator_set_voltage(vbus, ...) */
4128 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
4129 port->explicit_contract = true;
4130 typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD);
4131 port->pwr_opmode = TYPEC_PWR_MODE_PD;
4132 tcpm_set_state_cond(port, SRC_READY, 0);
4136 port->hard_reset_count = 0;
4138 port->try_src_count = 0;
4140 tcpm_swap_complete(port, 0);
4141 tcpm_typec_connect(port);
4143 if (port->ams != NONE_AMS)
4144 tcpm_ams_finish(port);
4145 if (port->next_ams != NONE_AMS) {
4146 port->ams = port->next_ams;
4147 port->next_ams = NONE_AMS;
4151 * If previous AMS is interrupted, switch to the upcoming
4154 if (port->upcoming_state != INVALID_STATE) {
4155 upcoming_state = port->upcoming_state;
4156 port->upcoming_state = INVALID_STATE;
4157 tcpm_set_state(port, upcoming_state, 0);
4162 * 6.4.4.3.1 Discover Identity
4163 * "The Discover Identity Command Shall only be sent to SOP when there is an
4164 * Explicit Contract."
4165 * For now, this driver only supports SOP for DISCOVER_IDENTITY, thus using
4166 * port->explicit_contract to decide whether to send the command.
4168 if (port->explicit_contract)
4169 mod_send_discover_delayed_work(port, 0);
4171 port->send_discover = false;
4175 * Sending ping messages is not necessary if
4176 * - the source operates at vSafe5V
4178 * - The system is not operating in PD mode
4180 * - Both partners are connected using a Type-C connector
4182 * There is no actual need to send PD messages since the local
4183 * port type-c and the spec does not clearly say whether PD is
4184 * possible when type-c is connected to Type-A/B
4187 case SRC_WAIT_NEW_CAPABILITIES:
4188 /* Nothing to do... */
4192 case SNK_UNATTACHED:
4193 if (!port->non_pd_role_swap)
4194 tcpm_swap_complete(port, -ENOTCONN);
4195 tcpm_pps_complete(port, -ENOTCONN);
4196 tcpm_snk_detach(port);
4197 if (port->potential_contaminant) {
4198 tcpm_set_state(port, CHECK_CONTAMINANT, 0);
4201 if (tcpm_start_toggling(port, TYPEC_CC_RD)) {
4202 tcpm_set_state(port, TOGGLING, 0);
4205 tcpm_set_cc(port, TYPEC_CC_RD);
4206 if (port->port_type == TYPEC_PORT_DRP)
4207 tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC);
4209 case SNK_ATTACH_WAIT:
4210 if ((port->cc1 == TYPEC_CC_OPEN &&
4211 port->cc2 != TYPEC_CC_OPEN) ||
4212 (port->cc1 != TYPEC_CC_OPEN &&
4213 port->cc2 == TYPEC_CC_OPEN))
4214 tcpm_set_state(port, SNK_DEBOUNCED,
4216 else if (tcpm_port_is_disconnected(port))
4217 tcpm_set_state(port, SNK_UNATTACHED,
4221 if (tcpm_port_is_disconnected(port))
4222 tcpm_set_state(port, SNK_UNATTACHED,
4224 else if (port->vbus_present)
4225 tcpm_set_state(port,
4226 tcpm_try_src(port) ? SRC_TRY
4231 port->try_src_count++;
4232 tcpm_set_cc(port, tcpm_rp_cc(port));
4234 tcpm_set_state(port, SRC_TRY_WAIT, 0);
4237 if (port->max_wait == 0) {
4238 port->max_wait = jiffies +
4239 msecs_to_jiffies(PD_T_DRP_TRY);
4240 msecs = PD_T_DRP_TRY;
4242 if (time_is_after_jiffies(port->max_wait))
4243 msecs = jiffies_to_msecs(port->max_wait -
4248 tcpm_set_state(port, SNK_TRYWAIT, msecs);
4250 case SRC_TRY_DEBOUNCE:
4251 tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE);
4254 tcpm_set_cc(port, TYPEC_CC_RD);
4255 tcpm_set_state(port, SNK_TRYWAIT_VBUS, PD_T_CC_DEBOUNCE);
4257 case SNK_TRYWAIT_VBUS:
4259 * TCPM stays in this state indefinitely until VBUS
4260 * is detected as long as Rp is not detected for
4261 * more than a time period of tPDDebounce.
4263 if (port->vbus_present && tcpm_port_is_sink(port)) {
4264 tcpm_set_state(port, SNK_ATTACHED, 0);
4267 if (!tcpm_port_is_sink(port))
4268 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
4270 case SNK_TRYWAIT_DEBOUNCE:
4271 tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_DEBOUNCE);
4274 ret = tcpm_snk_attach(port);
4276 tcpm_set_state(port, SNK_UNATTACHED, 0);
4278 tcpm_set_state(port, SNK_STARTUP, 0);
4281 opmode = tcpm_get_pwr_opmode(port->polarity ?
4282 port->cc2 : port->cc1);
4283 typec_set_pwr_opmode(port->typec_port, opmode);
4284 port->pwr_opmode = TYPEC_PWR_MODE_USB;
4285 port->negotiated_rev = PD_MAX_REV;
4286 port->message_id = 0;
4287 port->rx_msgid = -1;
4288 port->explicit_contract = false;
4290 if (port->ams == POWER_ROLE_SWAP ||
4291 port->ams == FAST_ROLE_SWAP)
4292 /* SRC -> SNK POWER/FAST_ROLE_SWAP finished */
4293 tcpm_ams_finish(port);
4295 tcpm_set_state(port, SNK_DISCOVERY, 0);
4298 if (port->vbus_present) {
4299 u32 current_lim = tcpm_get_current_limit(port);
4301 if (port->slow_charger_loop && (current_lim > PD_P_SNK_STDBY_MW / 5))
4302 current_lim = PD_P_SNK_STDBY_MW / 5;
4303 tcpm_set_current_limit(port, current_lim, 5000);
4304 tcpm_set_charge(port, true);
4305 if (!port->pd_supported)
4306 tcpm_set_state(port, SNK_READY, 0);
4308 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
4312 * For DRP, timeouts differ. Also, handling is supposed to be
4313 * different and much more complex (dead battery detection;
4314 * see USB power delivery specification, section 8.3.3.6.1.5.1).
4316 tcpm_set_state(port, hard_reset_state(port),
4317 port->port_type == TYPEC_PORT_DRP ?
4318 PD_T_DB_DETECT : PD_T_NO_RESPONSE);
4320 case SNK_DISCOVERY_DEBOUNCE:
4321 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE,
4324 case SNK_DISCOVERY_DEBOUNCE_DONE:
4325 if (!tcpm_port_is_disconnected(port) &&
4326 tcpm_port_is_sink(port) &&
4327 ktime_after(port->delayed_runtime, ktime_get())) {
4328 tcpm_set_state(port, SNK_DISCOVERY,
4329 ktime_to_ms(ktime_sub(port->delayed_runtime, ktime_get())));
4332 tcpm_set_state(port, unattached_state(port), 0);
4334 case SNK_WAIT_CAPABILITIES:
4335 ret = port->tcpc->set_pd_rx(port->tcpc, true);
4337 tcpm_set_state(port, SNK_READY, 0);
4341 * If VBUS has never been low, and we time out waiting
4342 * for source cap, try a soft reset first, in case we
4343 * were already in a stable contract before this boot.
4344 * Do this only once.
4346 if (port->vbus_never_low) {
4347 port->vbus_never_low = false;
4348 tcpm_set_state(port, SNK_SOFT_RESET,
4349 PD_T_SINK_WAIT_CAP);
4351 tcpm_set_state(port, hard_reset_state(port),
4352 PD_T_SINK_WAIT_CAP);
4355 case SNK_NEGOTIATE_CAPABILITIES:
4356 port->pd_capable = true;
4357 tcpm_set_partner_usb_comm_capable(port,
4358 !!(port->source_caps[0] & PDO_FIXED_USB_COMM));
4359 port->hard_reset_count = 0;
4360 ret = tcpm_pd_send_request(port);
4362 /* Restore back to the original state */
4363 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD,
4364 port->pps_data.active,
4365 port->supply_voltage);
4366 /* Let the Source send capabilities again. */
4367 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
4369 tcpm_set_state_cond(port, hard_reset_state(port),
4370 PD_T_SENDER_RESPONSE);
4373 case SNK_NEGOTIATE_PPS_CAPABILITIES:
4374 ret = tcpm_pd_send_pps_request(port);
4376 /* Restore back to the original state */
4377 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD,
4378 port->pps_data.active,
4379 port->supply_voltage);
4380 port->pps_status = ret;
4382 * If this was called due to updates to sink
4383 * capabilities, and pps is no longer valid, we should
4384 * safely fall back to a standard PDO.
4386 if (port->update_sink_caps)
4387 tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
4389 tcpm_set_state(port, SNK_READY, 0);
4391 tcpm_set_state_cond(port, hard_reset_state(port),
4392 PD_T_SENDER_RESPONSE);
4395 case SNK_TRANSITION_SINK:
4396 /* From the USB PD spec:
4397 * "The Sink Shall transition to Sink Standby before a positive or
4398 * negative voltage transition of VBUS. During Sink Standby
4399 * the Sink Shall reduce its power draw to pSnkStdby."
4401 * This is not applicable to PPS though as the port can continue
4402 * to draw negotiated power without switching to standby.
4404 if (port->supply_voltage != port->req_supply_voltage && !port->pps_data.active &&
4405 port->current_limit * port->supply_voltage / 1000 > PD_P_SNK_STDBY_MW) {
4406 u32 stdby_ma = PD_P_SNK_STDBY_MW * 1000 / port->supply_voltage;
4408 tcpm_log(port, "Setting standby current %u mV @ %u mA",
4409 port->supply_voltage, stdby_ma);
4410 tcpm_set_current_limit(port, stdby_ma, port->supply_voltage);
4413 case SNK_TRANSITION_SINK_VBUS:
4414 tcpm_set_state(port, hard_reset_state(port),
4415 PD_T_PS_TRANSITION);
4418 port->try_snk_count = 0;
4419 port->update_sink_caps = false;
4420 if (port->explicit_contract) {
4421 typec_set_pwr_opmode(port->typec_port,
4423 port->pwr_opmode = TYPEC_PWR_MODE_PD;
4426 if (!port->pd_capable && port->slow_charger_loop)
4427 tcpm_set_current_limit(port, tcpm_get_current_limit(port), 5000);
4428 tcpm_swap_complete(port, 0);
4429 tcpm_typec_connect(port);
4430 mod_enable_frs_delayed_work(port, 0);
4431 tcpm_pps_complete(port, port->pps_status);
4433 if (port->ams != NONE_AMS)
4434 tcpm_ams_finish(port);
4435 if (port->next_ams != NONE_AMS) {
4436 port->ams = port->next_ams;
4437 port->next_ams = NONE_AMS;
4441 * If previous AMS is interrupted, switch to the upcoming
4444 if (port->upcoming_state != INVALID_STATE) {
4445 upcoming_state = port->upcoming_state;
4446 port->upcoming_state = INVALID_STATE;
4447 tcpm_set_state(port, upcoming_state, 0);
4452 * 6.4.4.3.1 Discover Identity
4453 * "The Discover Identity Command Shall only be sent to SOP when there is an
4454 * Explicit Contract."
4455 * For now, this driver only supports SOP for DISCOVER_IDENTITY, thus using
4456 * port->explicit_contract.
4458 if (port->explicit_contract)
4459 mod_send_discover_delayed_work(port, 0);
4461 port->send_discover = false;
4463 power_supply_changed(port->psy);
4466 /* Accessory states */
4467 case ACC_UNATTACHED:
4468 tcpm_acc_detach(port);
4469 tcpm_set_state(port, SRC_UNATTACHED, 0);
4471 case DEBUG_ACC_ATTACHED:
4472 case AUDIO_ACC_ATTACHED:
4473 ret = tcpm_acc_attach(port);
4475 tcpm_set_state(port, ACC_UNATTACHED, 0);
4477 case AUDIO_ACC_DEBOUNCE:
4478 tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE);
4481 /* Hard_Reset states */
4482 case HARD_RESET_SEND:
4483 if (port->ams != NONE_AMS)
4484 tcpm_ams_finish(port);
4486 * State machine will be directed to HARD_RESET_START,
4487 * thus set upcoming_state to INVALID_STATE.
4489 port->upcoming_state = INVALID_STATE;
4490 tcpm_ams_start(port, HARD_RESET);
4492 case HARD_RESET_START:
4493 port->sink_cap_done = false;
4494 if (port->tcpc->enable_frs)
4495 port->tcpc->enable_frs(port->tcpc, false);
4496 port->hard_reset_count++;
4497 port->tcpc->set_pd_rx(port->tcpc, false);
4498 tcpm_unregister_altmodes(port);
4499 port->nr_sink_caps = 0;
4500 port->send_discover = true;
4501 if (port->pwr_role == TYPEC_SOURCE)
4502 tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF,
4503 PD_T_PS_HARD_RESET);
4505 tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0);
4507 case SRC_HARD_RESET_VBUS_OFF:
4509 * 7.1.5 Response to Hard Resets
4510 * Hard Reset Signaling indicates a communication failure has occurred and the
4511 * Source Shall stop driving VCONN, Shall remove Rp from the VCONN pin and Shall
4512 * drive VBUS to vSafe0V as shown in Figure 7-9.
4514 tcpm_set_vconn(port, false);
4515 tcpm_set_vbus(port, false);
4516 tcpm_set_roles(port, port->self_powered, TYPEC_SOURCE,
4517 tcpm_data_role_for_source(port));
4519 * If tcpc fails to notify vbus off, TCPM will wait for PD_T_SAFE_0V +
4520 * PD_T_SRC_RECOVER before turning vbus back on.
4521 * From Table 7-12 Sequence Description for a Source Initiated Hard Reset:
4522 * 4. Policy Engine waits tPSHardReset after sending Hard Reset Signaling and then
4523 * tells the Device Policy Manager to instruct the power supply to perform a
4524 * Hard Reset. The transition to vSafe0V Shall occur within tSafe0V (t2).
4525 * 5. After tSrcRecover the Source applies power to VBUS in an attempt to
4526 * re-establish communication with the Sink and resume USB Default Operation.
4527 * The transition to vSafe5V Shall occur within tSrcTurnOn(t4).
4529 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SAFE_0V + PD_T_SRC_RECOVER);
4531 case SRC_HARD_RESET_VBUS_ON:
4532 tcpm_set_vconn(port, true);
4533 tcpm_set_vbus(port, true);
4534 if (port->ams == HARD_RESET)
4535 tcpm_ams_finish(port);
4536 if (port->pd_supported)
4537 port->tcpc->set_pd_rx(port->tcpc, true);
4538 tcpm_set_attached_state(port, true);
4539 tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON);
4541 case SNK_HARD_RESET_SINK_OFF:
4542 /* Do not discharge/disconnect during hard reseet */
4543 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, 0);
4544 memset(&port->pps_data, 0, sizeof(port->pps_data));
4545 tcpm_set_vconn(port, false);
4546 if (port->pd_capable)
4547 tcpm_set_charge(port, false);
4548 tcpm_set_roles(port, port->self_powered, TYPEC_SINK,
4549 tcpm_data_role_for_sink(port));
4551 * VBUS may or may not toggle, depending on the adapter.
4552 * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON
4553 * directly after timeout.
4555 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V);
4557 case SNK_HARD_RESET_WAIT_VBUS:
4558 if (port->ams == HARD_RESET)
4559 tcpm_ams_finish(port);
4560 /* Assume we're disconnected if VBUS doesn't come back. */
4561 tcpm_set_state(port, SNK_UNATTACHED,
4562 PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON);
4564 case SNK_HARD_RESET_SINK_ON:
4565 /* Note: There is no guarantee that VBUS is on in this state */
4568 * The specification suggests that dual mode ports in sink
4569 * mode should transition to state PE_SRC_Transition_to_default.
4570 * See USB power delivery specification chapter 8.3.3.6.1.3.
4571 * This would mean to
4572 * - turn off VCONN, reset power supply
4573 * - request hardware reset
4575 * - Transition to state PE_Src_Startup
4576 * SNK only ports shall transition to state Snk_Startup
4577 * (see chapter 8.3.3.3.8).
4578 * Similar, dual-mode ports in source mode should transition
4579 * to PE_SNK_Transition_to_default.
4581 if (port->pd_capable) {
4582 tcpm_set_current_limit(port,
4583 tcpm_get_current_limit(port),
4585 tcpm_set_charge(port, true);
4587 if (port->ams == HARD_RESET)
4588 tcpm_ams_finish(port);
4589 tcpm_set_attached_state(port, true);
4590 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, VSAFE5V);
4591 tcpm_set_state(port, SNK_STARTUP, 0);
4594 /* Soft_Reset states */
4596 port->message_id = 0;
4597 port->rx_msgid = -1;
4598 /* remove existing capabilities */
4599 usb_power_delivery_unregister_capabilities(port->partner_source_caps);
4600 port->partner_source_caps = NULL;
4601 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
4602 tcpm_ams_finish(port);
4603 if (port->pwr_role == TYPEC_SOURCE) {
4604 port->upcoming_state = SRC_SEND_CAPABILITIES;
4605 tcpm_ams_start(port, POWER_NEGOTIATION);
4607 tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
4610 case SRC_SOFT_RESET_WAIT_SNK_TX:
4611 case SNK_SOFT_RESET:
4612 if (port->ams != NONE_AMS)
4613 tcpm_ams_finish(port);
4614 port->upcoming_state = SOFT_RESET_SEND;
4615 tcpm_ams_start(port, SOFT_RESET_AMS);
4617 case SOFT_RESET_SEND:
4618 port->message_id = 0;
4619 port->rx_msgid = -1;
4620 /* remove existing capabilities */
4621 usb_power_delivery_unregister_capabilities(port->partner_source_caps);
4622 port->partner_source_caps = NULL;
4623 if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET))
4624 tcpm_set_state_cond(port, hard_reset_state(port), 0);
4626 tcpm_set_state_cond(port, hard_reset_state(port),
4627 PD_T_SENDER_RESPONSE);
4630 /* DR_Swap states */
4632 tcpm_pd_send_control(port, PD_CTRL_DR_SWAP);
4633 if (port->data_role == TYPEC_DEVICE || port->negotiated_rev > PD_REV20)
4634 port->send_discover = true;
4635 tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT,
4636 PD_T_SENDER_RESPONSE);
4638 case DR_SWAP_ACCEPT:
4639 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
4640 if (port->data_role == TYPEC_DEVICE || port->negotiated_rev > PD_REV20)
4641 port->send_discover = true;
4642 tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0);
4644 case DR_SWAP_SEND_TIMEOUT:
4645 tcpm_swap_complete(port, -ETIMEDOUT);
4646 port->send_discover = false;
4647 tcpm_ams_finish(port);
4648 tcpm_set_state(port, ready_state(port), 0);
4650 case DR_SWAP_CHANGE_DR:
4651 tcpm_unregister_altmodes(port);
4652 if (port->data_role == TYPEC_HOST)
4653 tcpm_set_roles(port, true, port->pwr_role,
4656 tcpm_set_roles(port, true, port->pwr_role,
4658 tcpm_ams_finish(port);
4659 tcpm_set_state(port, ready_state(port), 0);
4663 if (tcpm_pd_send_control(port, PD_CTRL_FR_SWAP)) {
4664 tcpm_set_state(port, ERROR_RECOVERY, 0);
4667 tcpm_set_state_cond(port, FR_SWAP_SEND_TIMEOUT, PD_T_SENDER_RESPONSE);
4669 case FR_SWAP_SEND_TIMEOUT:
4670 tcpm_set_state(port, ERROR_RECOVERY, 0);
4672 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
4673 tcpm_set_state(port, ERROR_RECOVERY, PD_T_PS_SOURCE_OFF);
4675 case FR_SWAP_SNK_SRC_NEW_SINK_READY:
4676 if (port->vbus_source)
4677 tcpm_set_state(port, FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED, 0);
4679 tcpm_set_state(port, ERROR_RECOVERY, PD_T_RECEIVER_RESPONSE);
4681 case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED:
4682 tcpm_set_pwr_role(port, TYPEC_SOURCE);
4683 if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
4684 tcpm_set_state(port, ERROR_RECOVERY, 0);
4687 tcpm_set_cc(port, tcpm_rp_cc(port));
4688 tcpm_set_state(port, SRC_STARTUP, PD_T_SWAP_SRC_START);
4691 /* PR_Swap states */
4692 case PR_SWAP_ACCEPT:
4693 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
4694 tcpm_set_state(port, PR_SWAP_START, 0);
4697 tcpm_pd_send_control(port, PD_CTRL_PR_SWAP);
4698 tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT,
4699 PD_T_SENDER_RESPONSE);
4701 case PR_SWAP_SEND_TIMEOUT:
4702 tcpm_swap_complete(port, -ETIMEDOUT);
4703 tcpm_set_state(port, ready_state(port), 0);
4706 tcpm_apply_rc(port);
4707 if (port->pwr_role == TYPEC_SOURCE)
4708 tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF,
4709 PD_T_SRC_TRANSITION);
4711 tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0);
4713 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
4715 * Prevent vbus discharge circuit from turning on during PR_SWAP
4716 * as this is not a disconnect.
4718 tcpm_set_vbus(port, false);
4719 port->explicit_contract = false;
4720 /* allow time for Vbus discharge, must be < tSrcSwapStdby */
4721 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF,
4724 case PR_SWAP_SRC_SNK_SOURCE_OFF:
4725 tcpm_set_cc(port, TYPEC_CC_RD);
4726 /* allow CC debounce */
4727 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED,
4730 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
4732 * USB-PD standard, 6.2.1.4, Port Power Role:
4733 * "During the Power Role Swap Sequence, for the initial Source
4734 * Port, the Port Power Role field shall be set to Sink in the
4735 * PS_RDY Message indicating that the initial Source’s power
4736 * supply is turned off"
4738 tcpm_set_pwr_role(port, TYPEC_SINK);
4739 if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
4740 tcpm_set_state(port, ERROR_RECOVERY, 0);
4743 tcpm_set_state(port, ERROR_RECOVERY, PD_T_PS_SOURCE_ON_PRS);
4745 case PR_SWAP_SRC_SNK_SINK_ON:
4746 tcpm_enable_auto_vbus_discharge(port, true);
4747 /* Set the vbus disconnect threshold for implicit contract */
4748 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB, false, VSAFE5V);
4749 tcpm_set_state(port, SNK_STARTUP, 0);
4751 case PR_SWAP_SNK_SRC_SINK_OFF:
4752 /* will be source, remove existing capabilities */
4753 usb_power_delivery_unregister_capabilities(port->partner_source_caps);
4754 port->partner_source_caps = NULL;
4756 * Prevent vbus discharge circuit from turning on during PR_SWAP
4757 * as this is not a disconnect.
4759 tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_USB,
4760 port->pps_data.active, 0);
4761 tcpm_set_charge(port, false);
4762 tcpm_set_state(port, hard_reset_state(port),
4763 PD_T_PS_SOURCE_OFF);
4765 case PR_SWAP_SNK_SRC_SOURCE_ON:
4766 tcpm_enable_auto_vbus_discharge(port, true);
4767 tcpm_set_cc(port, tcpm_rp_cc(port));
4768 tcpm_set_vbus(port, true);
4770 * allow time VBUS ramp-up, must be < tNewSrc
4771 * Also, this window overlaps with CC debounce as well.
4772 * So, Wait for the max of two which is PD_T_NEWSRC
4774 tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP,
4777 case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP:
4779 * USB PD standard, 6.2.1.4:
4780 * "Subsequent Messages initiated by the Policy Engine,
4781 * such as the PS_RDY Message sent to indicate that Vbus
4782 * is ready, will have the Port Power Role field set to
4785 tcpm_set_pwr_role(port, TYPEC_SOURCE);
4786 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
4787 tcpm_set_state(port, SRC_STARTUP, PD_T_SWAP_SRC_START);
4790 case VCONN_SWAP_ACCEPT:
4791 tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
4792 tcpm_ams_finish(port);
4793 tcpm_set_state(port, VCONN_SWAP_START, 0);
4795 case VCONN_SWAP_SEND:
4796 tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP);
4797 tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT,
4798 PD_T_SENDER_RESPONSE);
4800 case VCONN_SWAP_SEND_TIMEOUT:
4801 tcpm_swap_complete(port, -ETIMEDOUT);
4802 tcpm_set_state(port, ready_state(port), 0);
4804 case VCONN_SWAP_START:
4805 if (port->vconn_role == TYPEC_SOURCE)
4806 tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0);
4808 tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0);
4810 case VCONN_SWAP_WAIT_FOR_VCONN:
4811 tcpm_set_state(port, hard_reset_state(port),
4812 PD_T_VCONN_SOURCE_ON);
4814 case VCONN_SWAP_TURN_ON_VCONN:
4815 tcpm_set_vconn(port, true);
4816 tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
4817 tcpm_set_state(port, ready_state(port), 0);
4819 case VCONN_SWAP_TURN_OFF_VCONN:
4820 tcpm_set_vconn(port, false);
4821 tcpm_set_state(port, ready_state(port), 0);
4824 case DR_SWAP_CANCEL:
4825 case PR_SWAP_CANCEL:
4826 case VCONN_SWAP_CANCEL:
4827 tcpm_swap_complete(port, port->swap_status);
4828 if (port->pwr_role == TYPEC_SOURCE)
4829 tcpm_set_state(port, SRC_READY, 0);
4831 tcpm_set_state(port, SNK_READY, 0);
4833 case FR_SWAP_CANCEL:
4834 if (port->pwr_role == TYPEC_SOURCE)
4835 tcpm_set_state(port, SRC_READY, 0);
4837 tcpm_set_state(port, SNK_READY, 0);
4841 switch (BDO_MODE_MASK(port->bist_request)) {
4842 case BDO_MODE_CARRIER2:
4843 tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
4844 tcpm_set_state(port, unattached_state(port),
4845 PD_T_BIST_CONT_MODE);
4847 case BDO_MODE_TESTDATA:
4848 if (port->tcpc->set_bist_data) {
4849 tcpm_log(port, "Enable BIST MODE TESTDATA");
4850 port->tcpc->set_bist_data(port->tcpc, true);
4857 case GET_STATUS_SEND:
4858 tcpm_pd_send_control(port, PD_CTRL_GET_STATUS);
4859 tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT,
4860 PD_T_SENDER_RESPONSE);
4862 case GET_STATUS_SEND_TIMEOUT:
4863 tcpm_set_state(port, ready_state(port), 0);
4865 case GET_PPS_STATUS_SEND:
4866 tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS);
4867 tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT,
4868 PD_T_SENDER_RESPONSE);
4870 case GET_PPS_STATUS_SEND_TIMEOUT:
4871 tcpm_set_state(port, ready_state(port), 0);
4874 tcpm_pd_send_control(port, PD_CTRL_GET_SINK_CAP);
4875 tcpm_set_state(port, GET_SINK_CAP_TIMEOUT, PD_T_SENDER_RESPONSE);
4877 case GET_SINK_CAP_TIMEOUT:
4878 port->sink_cap_done = true;
4879 tcpm_set_state(port, ready_state(port), 0);
4881 case ERROR_RECOVERY:
4882 tcpm_swap_complete(port, -EPROTO);
4883 tcpm_pps_complete(port, -EPROTO);
4884 tcpm_set_state(port, PORT_RESET, 0);
4887 tcpm_reset_port(port);
4888 tcpm_set_cc(port, tcpm_default_state(port) == SNK_UNATTACHED ?
4889 TYPEC_CC_RD : tcpm_rp_cc(port));
4890 tcpm_set_state(port, PORT_RESET_WAIT_OFF,
4891 PD_T_ERROR_RECOVERY);
4893 case PORT_RESET_WAIT_OFF:
4894 tcpm_set_state(port,
4895 tcpm_default_state(port),
4896 port->vbus_present ? PD_T_PS_SOURCE_OFF : 0);
4899 /* AMS intermediate state */
4901 if (port->upcoming_state == INVALID_STATE) {
4902 tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ?
4903 SRC_READY : SNK_READY, 0);
4907 upcoming_state = port->upcoming_state;
4908 port->upcoming_state = INVALID_STATE;
4909 tcpm_set_state(port, upcoming_state, 0);
4913 case CHUNK_NOT_SUPP:
4914 tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP);
4915 tcpm_set_state(port, port->pwr_role == TYPEC_SOURCE ? SRC_READY : SNK_READY, 0);
4918 WARN(1, "Unexpected port state %d\n", port->state);
4923 static void tcpm_state_machine_work(struct kthread_work *work)
4925 struct tcpm_port *port = container_of(work, struct tcpm_port, state_machine);
4926 enum tcpm_state prev_state;
4928 mutex_lock(&port->lock);
4929 port->state_machine_running = true;
4931 if (port->queued_message && tcpm_send_queued_message(port))
4934 /* If we were queued due to a delayed state change, update it now */
4935 if (port->delayed_state) {
4936 tcpm_log(port, "state change %s -> %s [delayed %ld ms]",
4937 tcpm_states[port->state],
4938 tcpm_states[port->delayed_state], port->delay_ms);
4939 port->prev_state = port->state;
4940 port->state = port->delayed_state;
4941 port->delayed_state = INVALID_STATE;
4945 * Continue running as long as we have (non-delayed) state changes
4949 prev_state = port->state;
4950 run_state_machine(port);
4951 if (port->queued_message)
4952 tcpm_send_queued_message(port);
4953 } while (port->state != prev_state && !port->delayed_state);
4956 port->state_machine_running = false;
4957 mutex_unlock(&port->lock);
4960 static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
4961 enum typec_cc_status cc2)
4963 enum typec_cc_status old_cc1, old_cc2;
4964 enum tcpm_state new_state;
4966 old_cc1 = port->cc1;
4967 old_cc2 = port->cc2;
4971 tcpm_log_force(port,
4972 "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]",
4973 old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state],
4975 tcpm_port_is_disconnected(port) ? "disconnected"
4978 switch (port->state) {
4980 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
4981 tcpm_port_is_source(port))
4982 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
4983 else if (tcpm_port_is_sink(port))
4984 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
4986 case CHECK_CONTAMINANT:
4987 /* Wait for Toggling to be resumed */
4989 case SRC_UNATTACHED:
4990 case ACC_UNATTACHED:
4991 if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
4992 tcpm_port_is_source(port))
4993 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
4995 case SRC_ATTACH_WAIT:
4996 if (tcpm_port_is_disconnected(port) ||
4997 tcpm_port_is_audio_detached(port))
4998 tcpm_set_state(port, SRC_UNATTACHED, 0);
4999 else if (cc1 != old_cc1 || cc2 != old_cc2)
5000 tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
5004 case SRC_SEND_CAPABILITIES:
5006 if (tcpm_port_is_disconnected(port) ||
5007 !tcpm_port_is_source(port)) {
5008 if (port->port_type == TYPEC_PORT_SRC)
5009 tcpm_set_state(port, SRC_UNATTACHED, tcpm_wait_for_discharge(port));
5011 tcpm_set_state(port, SNK_UNATTACHED, tcpm_wait_for_discharge(port));
5014 case SNK_UNATTACHED:
5015 if (tcpm_port_is_sink(port))
5016 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
5018 case SNK_ATTACH_WAIT:
5019 if ((port->cc1 == TYPEC_CC_OPEN &&
5020 port->cc2 != TYPEC_CC_OPEN) ||
5021 (port->cc1 != TYPEC_CC_OPEN &&
5022 port->cc2 == TYPEC_CC_OPEN))
5023 new_state = SNK_DEBOUNCED;
5024 else if (tcpm_port_is_disconnected(port))
5025 new_state = SNK_UNATTACHED;
5028 if (new_state != port->delayed_state)
5029 tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
5032 if (tcpm_port_is_disconnected(port))
5033 new_state = SNK_UNATTACHED;
5034 else if (port->vbus_present)
5035 new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED;
5037 new_state = SNK_UNATTACHED;
5038 if (new_state != port->delayed_state)
5039 tcpm_set_state(port, SNK_DEBOUNCED, 0);
5043 * EXIT condition is based primarily on vbus disconnect and CC is secondary.
5044 * "A port that has entered into USB PD communications with the Source and
5045 * has seen the CC voltage exceed vRd-USB may monitor the CC pin to detect
5046 * cable disconnect in addition to monitoring VBUS.
5048 * A port that is monitoring the CC voltage for disconnect (but is not in
5049 * the process of a USB PD PR_Swap or USB PD FR_Swap) shall transition to
5050 * Unattached.SNK within tSinkDisconnect after the CC voltage remains below
5051 * vRd-USB for tPDDebounce."
5053 * When set_auto_vbus_discharge_threshold is enabled, CC pins go
5054 * away before vbus decays to disconnect threshold. Allow
5055 * disconnect to be driven by vbus disconnect when auto vbus
5056 * discharge is enabled.
5058 if (!port->auto_vbus_discharge_enabled && tcpm_port_is_disconnected(port))
5059 tcpm_set_state(port, unattached_state(port), 0);
5060 else if (!port->pd_capable &&
5061 (cc1 != old_cc1 || cc2 != old_cc2))
5062 tcpm_set_current_limit(port,
5063 tcpm_get_current_limit(port),
5067 case AUDIO_ACC_ATTACHED:
5068 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
5069 tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0);
5071 case AUDIO_ACC_DEBOUNCE:
5072 if (tcpm_port_is_audio(port))
5073 tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0);
5076 case DEBUG_ACC_ATTACHED:
5077 if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
5078 tcpm_set_state(port, ACC_UNATTACHED, 0);
5082 /* Do nothing, waiting for timeout */
5086 /* CC line is unstable, wait for debounce */
5087 if (tcpm_port_is_disconnected(port))
5088 tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0);
5090 case SNK_DISCOVERY_DEBOUNCE:
5094 /* Hand over to state machine if needed */
5095 if (!port->vbus_present && tcpm_port_is_source(port))
5096 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
5098 case SRC_TRYWAIT_DEBOUNCE:
5099 if (port->vbus_present || !tcpm_port_is_source(port))
5100 tcpm_set_state(port, SRC_TRYWAIT, 0);
5102 case SNK_TRY_WAIT_DEBOUNCE:
5103 if (!tcpm_port_is_sink(port)) {
5105 tcpm_set_state(port, SRC_TRYWAIT, 0);
5109 if (tcpm_port_is_source(port))
5110 tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0);
5112 case SRC_TRY_DEBOUNCE:
5113 tcpm_set_state(port, SRC_TRY_WAIT, 0);
5115 case SNK_TRYWAIT_DEBOUNCE:
5116 if (tcpm_port_is_sink(port))
5117 tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0);
5119 case SNK_TRYWAIT_VBUS:
5120 if (!tcpm_port_is_sink(port))
5121 tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
5123 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
5124 if (!tcpm_port_is_sink(port))
5125 tcpm_set_state(port, SRC_TRYWAIT, PD_T_TRY_CC_DEBOUNCE);
5127 tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS, 0);
5130 /* Do nothing, waiting for tCCDebounce */
5132 case PR_SWAP_SNK_SRC_SINK_OFF:
5133 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
5134 case PR_SWAP_SRC_SNK_SOURCE_OFF:
5135 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
5136 case PR_SWAP_SNK_SRC_SOURCE_ON:
5138 * CC state change is expected in PR_SWAP
5143 case FR_SWAP_SEND_TIMEOUT:
5144 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
5145 case FR_SWAP_SNK_SRC_NEW_SINK_READY:
5146 case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED:
5147 /* Do nothing, CC change expected */
5151 case PORT_RESET_WAIT_OFF:
5153 * State set back to default mode once the timer completes.
5154 * Ignore CC changes here.
5159 * While acting as sink and auto vbus discharge is enabled, Allow disconnect
5160 * to be driven by vbus disconnect.
5162 if (tcpm_port_is_disconnected(port) && !(port->pwr_role == TYPEC_SINK &&
5163 port->auto_vbus_discharge_enabled))
5164 tcpm_set_state(port, unattached_state(port), 0);
5169 static void _tcpm_pd_vbus_on(struct tcpm_port *port)
5171 tcpm_log_force(port, "VBUS on");
5172 port->vbus_present = true;
5174 * When vbus_present is true i.e. Voltage at VBUS is greater than VSAFE5V implicitly
5175 * states that vbus is not at VSAFE0V, hence clear the vbus_vsafe0v flag here.
5177 port->vbus_vsafe0v = false;
5179 switch (port->state) {
5180 case SNK_TRANSITION_SINK_VBUS:
5181 port->explicit_contract = true;
5182 tcpm_set_state(port, SNK_READY, 0);
5185 tcpm_set_state(port, SNK_DISCOVERY, 0);
5189 tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY
5193 case SNK_HARD_RESET_WAIT_VBUS:
5194 tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0);
5197 tcpm_set_state(port, SRC_STARTUP, 0);
5199 case SRC_HARD_RESET_VBUS_ON:
5200 tcpm_set_state(port, SRC_STARTUP, 0);
5204 /* Do nothing, waiting for timeout */
5207 /* Do nothing, Waiting for Rd to be detected */
5209 case SRC_TRYWAIT_DEBOUNCE:
5210 tcpm_set_state(port, SRC_TRYWAIT, 0);
5212 case SNK_TRY_WAIT_DEBOUNCE:
5213 /* Do nothing, waiting for PD_DEBOUNCE to do be done */
5216 /* Do nothing, waiting for tCCDebounce */
5218 case SNK_TRYWAIT_VBUS:
5219 if (tcpm_port_is_sink(port))
5220 tcpm_set_state(port, SNK_ATTACHED, 0);
5222 case SNK_TRYWAIT_DEBOUNCE:
5223 /* Do nothing, waiting for Rp */
5225 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
5226 if (port->vbus_present && tcpm_port_is_sink(port))
5227 tcpm_set_state(port, SNK_ATTACHED, 0);
5230 case SRC_TRY_DEBOUNCE:
5231 /* Do nothing, waiting for sink detection */
5234 case FR_SWAP_SEND_TIMEOUT:
5235 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
5236 case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED:
5237 if (port->tcpc->frs_sourcing_vbus)
5238 port->tcpc->frs_sourcing_vbus(port->tcpc);
5240 case FR_SWAP_SNK_SRC_NEW_SINK_READY:
5241 if (port->tcpc->frs_sourcing_vbus)
5242 port->tcpc->frs_sourcing_vbus(port->tcpc);
5243 tcpm_set_state(port, FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED, 0);
5247 case PORT_RESET_WAIT_OFF:
5249 * State set back to default mode once the timer completes.
5250 * Ignore vbus changes here.
5259 static void _tcpm_pd_vbus_off(struct tcpm_port *port)
5261 tcpm_log_force(port, "VBUS off");
5262 port->vbus_present = false;
5263 port->vbus_never_low = false;
5264 switch (port->state) {
5265 case SNK_HARD_RESET_SINK_OFF:
5266 tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0);
5268 case HARD_RESET_SEND:
5271 /* Do nothing, waiting for timeout */
5274 /* Hand over to state machine if needed */
5275 if (tcpm_port_is_source(port))
5276 tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
5278 case SNK_TRY_WAIT_DEBOUNCE:
5279 /* Do nothing, waiting for PD_DEBOUNCE to do be done */
5282 case SNK_TRYWAIT_VBUS:
5283 case SNK_TRYWAIT_DEBOUNCE:
5285 case SNK_ATTACH_WAIT:
5287 /* Do nothing, as TCPM is still waiting for vbus to reaach VSAFE5V to connect */
5290 case SNK_NEGOTIATE_CAPABILITIES:
5293 case PR_SWAP_SRC_SNK_TRANSITION_OFF:
5294 tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0);
5297 case PR_SWAP_SNK_SRC_SINK_OFF:
5298 /* Do nothing, expected */
5301 case PR_SWAP_SNK_SRC_SOURCE_ON:
5303 * Do nothing when vbus off notification is received.
5304 * TCPM can wait for PD_T_NEWSRC in PR_SWAP_SNK_SRC_SOURCE_ON
5305 * for the vbus source to ramp up.
5309 case PORT_RESET_WAIT_OFF:
5310 tcpm_set_state(port, tcpm_default_state(port), 0);
5314 case SRC_TRY_DEBOUNCE:
5315 /* Do nothing, waiting for sink detection */
5319 case SRC_SEND_CAPABILITIES:
5320 case SRC_SEND_CAPABILITIES_TIMEOUT:
5321 case SRC_NEGOTIATE_CAPABILITIES:
5322 case SRC_TRANSITION_SUPPLY:
5324 case SRC_WAIT_NEW_CAPABILITIES:
5326 * Force to unattached state to re-initiate connection.
5327 * DRP port should move to Unattached.SNK instead of Unattached.SRC if
5328 * sink removed. Although sink removal here is due to source's vbus collapse,
5329 * treat it the same way for consistency.
5331 if (port->port_type == TYPEC_PORT_SRC)
5332 tcpm_set_state(port, SRC_UNATTACHED, tcpm_wait_for_discharge(port));
5334 tcpm_set_state(port, SNK_UNATTACHED, tcpm_wait_for_discharge(port));
5339 * State set back to default mode once the timer completes.
5340 * Ignore vbus changes here.
5345 case FR_SWAP_SEND_TIMEOUT:
5346 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF:
5347 case FR_SWAP_SNK_SRC_NEW_SINK_READY:
5348 case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED:
5349 /* Do nothing, vbus drop expected */
5352 case SNK_HARD_RESET_WAIT_VBUS:
5353 /* Do nothing, its OK to receive vbus off events */
5357 if (port->pwr_role == TYPEC_SINK && port->attached)
5358 tcpm_set_state(port, SNK_UNATTACHED, tcpm_wait_for_discharge(port));
5363 static void _tcpm_pd_vbus_vsafe0v(struct tcpm_port *port)
5365 tcpm_log_force(port, "VBUS VSAFE0V");
5366 port->vbus_vsafe0v = true;
5367 switch (port->state) {
5368 case SRC_HARD_RESET_VBUS_OFF:
5370 * After establishing the vSafe0V voltage condition on VBUS, the Source Shall wait
5371 * tSrcRecover before re-applying VCONN and restoring VBUS to vSafe5V.
5373 tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
5375 case SRC_ATTACH_WAIT:
5376 if (tcpm_port_is_source(port))
5377 tcpm_set_state(port, tcpm_try_snk(port) ? SNK_TRY : SRC_ATTACHED,
5381 case SRC_SEND_CAPABILITIES:
5382 case SRC_SEND_CAPABILITIES_TIMEOUT:
5383 case SRC_NEGOTIATE_CAPABILITIES:
5384 case SRC_TRANSITION_SUPPLY:
5386 case SRC_WAIT_NEW_CAPABILITIES:
5387 if (port->auto_vbus_discharge_enabled) {
5388 if (port->port_type == TYPEC_PORT_SRC)
5389 tcpm_set_state(port, SRC_UNATTACHED, 0);
5391 tcpm_set_state(port, SNK_UNATTACHED, 0);
5394 case PR_SWAP_SNK_SRC_SINK_OFF:
5395 case PR_SWAP_SNK_SRC_SOURCE_ON:
5396 /* Do nothing, vsafe0v is expected during transition */
5398 case SNK_ATTACH_WAIT:
5400 /*Do nothing, still waiting for VSAFE5V for connect */
5402 case SNK_HARD_RESET_WAIT_VBUS:
5403 /* Do nothing, its OK to receive vbus off events */
5406 if (port->pwr_role == TYPEC_SINK && port->auto_vbus_discharge_enabled)
5407 tcpm_set_state(port, SNK_UNATTACHED, 0);
5412 static void _tcpm_pd_hard_reset(struct tcpm_port *port)
5414 tcpm_log_force(port, "Received hard reset");
5415 if (port->bist_request == BDO_MODE_TESTDATA && port->tcpc->set_bist_data)
5416 port->tcpc->set_bist_data(port->tcpc, false);
5418 if (port->ams != NONE_AMS)
5419 port->ams = NONE_AMS;
5420 if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)
5421 port->ams = HARD_RESET;
5423 * If we keep receiving hard reset requests, executing the hard reset
5424 * must have failed. Revert to error recovery if that happens.
5426 tcpm_set_state(port,
5427 port->hard_reset_count < PD_N_HARD_RESET_COUNT ?
5428 HARD_RESET_START : ERROR_RECOVERY,
5432 static void tcpm_pd_event_handler(struct kthread_work *work)
5434 struct tcpm_port *port = container_of(work, struct tcpm_port,
5438 mutex_lock(&port->lock);
5440 spin_lock(&port->pd_event_lock);
5441 while (port->pd_events) {
5442 events = port->pd_events;
5443 port->pd_events = 0;
5444 spin_unlock(&port->pd_event_lock);
5445 if (events & TCPM_RESET_EVENT)
5446 _tcpm_pd_hard_reset(port);
5447 if (events & TCPM_VBUS_EVENT) {
5450 vbus = port->tcpc->get_vbus(port->tcpc);
5452 _tcpm_pd_vbus_on(port);
5454 _tcpm_pd_vbus_off(port);
5456 * When TCPC does not support detecting vsafe0v voltage level,
5457 * treat vbus absent as vsafe0v. Else invoke is_vbus_vsafe0v
5458 * to see if vbus has discharge to VSAFE0V.
5460 if (!port->tcpc->is_vbus_vsafe0v ||
5461 port->tcpc->is_vbus_vsafe0v(port->tcpc))
5462 _tcpm_pd_vbus_vsafe0v(port);
5465 if (events & TCPM_CC_EVENT) {
5466 enum typec_cc_status cc1, cc2;
5468 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
5469 _tcpm_cc_change(port, cc1, cc2);
5471 if (events & TCPM_FRS_EVENT) {
5472 if (port->state == SNK_READY) {
5475 port->upcoming_state = FR_SWAP_SEND;
5476 ret = tcpm_ams_start(port, FAST_ROLE_SWAP);
5478 port->upcoming_state = INVALID_STATE;
5480 tcpm_log(port, "Discarding FRS_SIGNAL! Not in sink ready");
5483 if (events & TCPM_SOURCING_VBUS) {
5484 tcpm_log(port, "sourcing vbus");
5486 * In fast role swap case TCPC autonomously sources vbus. Set vbus_source
5487 * true as TCPM wouldn't have called tcpm_set_vbus.
5489 * When vbus is sourced on the command on TCPM i.e. TCPM called
5490 * tcpm_set_vbus to source vbus, vbus_source would already be true.
5492 port->vbus_source = true;
5493 _tcpm_pd_vbus_on(port);
5495 if (events & TCPM_PORT_CLEAN) {
5496 tcpm_log(port, "port clean");
5497 if (port->state == CHECK_CONTAMINANT) {
5498 if (tcpm_start_toggling(port, tcpm_rp_cc(port)))
5499 tcpm_set_state(port, TOGGLING, 0);
5501 tcpm_set_state(port, tcpm_default_state(port), 0);
5505 spin_lock(&port->pd_event_lock);
5507 spin_unlock(&port->pd_event_lock);
5508 mutex_unlock(&port->lock);
5511 void tcpm_cc_change(struct tcpm_port *port)
5513 spin_lock(&port->pd_event_lock);
5514 port->pd_events |= TCPM_CC_EVENT;
5515 spin_unlock(&port->pd_event_lock);
5516 kthread_queue_work(port->wq, &port->event_work);
5518 EXPORT_SYMBOL_GPL(tcpm_cc_change);
5520 void tcpm_vbus_change(struct tcpm_port *port)
5522 spin_lock(&port->pd_event_lock);
5523 port->pd_events |= TCPM_VBUS_EVENT;
5524 spin_unlock(&port->pd_event_lock);
5525 kthread_queue_work(port->wq, &port->event_work);
5527 EXPORT_SYMBOL_GPL(tcpm_vbus_change);
5529 void tcpm_pd_hard_reset(struct tcpm_port *port)
5531 spin_lock(&port->pd_event_lock);
5532 port->pd_events = TCPM_RESET_EVENT;
5533 spin_unlock(&port->pd_event_lock);
5534 kthread_queue_work(port->wq, &port->event_work);
5536 EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
5538 void tcpm_sink_frs(struct tcpm_port *port)
5540 spin_lock(&port->pd_event_lock);
5541 port->pd_events |= TCPM_FRS_EVENT;
5542 spin_unlock(&port->pd_event_lock);
5543 kthread_queue_work(port->wq, &port->event_work);
5545 EXPORT_SYMBOL_GPL(tcpm_sink_frs);
5547 void tcpm_sourcing_vbus(struct tcpm_port *port)
5549 spin_lock(&port->pd_event_lock);
5550 port->pd_events |= TCPM_SOURCING_VBUS;
5551 spin_unlock(&port->pd_event_lock);
5552 kthread_queue_work(port->wq, &port->event_work);
5554 EXPORT_SYMBOL_GPL(tcpm_sourcing_vbus);
5556 void tcpm_port_clean(struct tcpm_port *port)
5558 spin_lock(&port->pd_event_lock);
5559 port->pd_events |= TCPM_PORT_CLEAN;
5560 spin_unlock(&port->pd_event_lock);
5561 kthread_queue_work(port->wq, &port->event_work);
5563 EXPORT_SYMBOL_GPL(tcpm_port_clean);
5565 bool tcpm_port_is_toggling(struct tcpm_port *port)
5567 return port->port_type == TYPEC_PORT_DRP && port->state == TOGGLING;
5569 EXPORT_SYMBOL_GPL(tcpm_port_is_toggling);
5571 static void tcpm_enable_frs_work(struct kthread_work *work)
5573 struct tcpm_port *port = container_of(work, struct tcpm_port, enable_frs);
5576 mutex_lock(&port->lock);
5577 /* Not FRS capable */
5578 if (!port->connected || port->port_type != TYPEC_PORT_DRP ||
5579 port->pwr_opmode != TYPEC_PWR_MODE_PD ||
5580 !port->tcpc->enable_frs ||
5581 /* Sink caps queried */
5582 port->sink_cap_done || port->negotiated_rev < PD_REV30)
5585 /* Send when the state machine is idle */
5586 if (port->state != SNK_READY || port->vdm_sm_running || port->send_discover)
5589 port->upcoming_state = GET_SINK_CAP;
5590 ret = tcpm_ams_start(port, GET_SINK_CAPABILITIES);
5591 if (ret == -EAGAIN) {
5592 port->upcoming_state = INVALID_STATE;
5594 port->sink_cap_done = true;
5598 mod_enable_frs_delayed_work(port, GET_SINK_CAP_RETRY_MS);
5600 mutex_unlock(&port->lock);
5603 static void tcpm_send_discover_work(struct kthread_work *work)
5605 struct tcpm_port *port = container_of(work, struct tcpm_port, send_discover_work);
5607 mutex_lock(&port->lock);
5608 /* No need to send DISCOVER_IDENTITY anymore */
5609 if (!port->send_discover)
5612 if (port->data_role == TYPEC_DEVICE && port->negotiated_rev < PD_REV30) {
5613 port->send_discover = false;
5617 /* Retry if the port is not idle */
5618 if ((port->state != SRC_READY && port->state != SNK_READY) || port->vdm_sm_running) {
5619 mod_send_discover_delayed_work(port, SEND_DISCOVER_RETRY_MS);
5623 tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0);
5626 mutex_unlock(&port->lock);
5629 static int tcpm_dr_set(struct typec_port *p, enum typec_data_role data)
5631 struct tcpm_port *port = typec_get_drvdata(p);
5634 mutex_lock(&port->swap_lock);
5635 mutex_lock(&port->lock);
5637 if (port->typec_caps.data != TYPEC_PORT_DRD) {
5641 if (port->state != SRC_READY && port->state != SNK_READY) {
5646 if (port->data_role == data) {
5653 * 6.3.9: If an alternate mode is active, a request to swap
5654 * alternate modes shall trigger a port reset.
5655 * Reject data role swap request in this case.
5658 if (!port->pd_capable) {
5660 * If the partner is not PD capable, reset the port to
5661 * trigger a role change. This can only work if a preferred
5662 * role is configured, and if it matches the requested role.
5664 if (port->try_role == TYPEC_NO_PREFERRED_ROLE ||
5665 port->try_role == port->pwr_role) {
5669 port->non_pd_role_swap = true;
5670 tcpm_set_state(port, PORT_RESET, 0);
5672 port->upcoming_state = DR_SWAP_SEND;
5673 ret = tcpm_ams_start(port, DATA_ROLE_SWAP);
5674 if (ret == -EAGAIN) {
5675 port->upcoming_state = INVALID_STATE;
5680 port->swap_status = 0;
5681 port->swap_pending = true;
5682 reinit_completion(&port->swap_complete);
5683 mutex_unlock(&port->lock);
5685 if (!wait_for_completion_timeout(&port->swap_complete,
5686 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
5689 ret = port->swap_status;
5691 port->non_pd_role_swap = false;
5695 mutex_unlock(&port->lock);
5697 mutex_unlock(&port->swap_lock);
5701 static int tcpm_pr_set(struct typec_port *p, enum typec_role role)
5703 struct tcpm_port *port = typec_get_drvdata(p);
5706 mutex_lock(&port->swap_lock);
5707 mutex_lock(&port->lock);
5709 if (port->port_type != TYPEC_PORT_DRP) {
5713 if (port->state != SRC_READY && port->state != SNK_READY) {
5718 if (role == port->pwr_role) {
5723 port->upcoming_state = PR_SWAP_SEND;
5724 ret = tcpm_ams_start(port, POWER_ROLE_SWAP);
5725 if (ret == -EAGAIN) {
5726 port->upcoming_state = INVALID_STATE;
5730 port->swap_status = 0;
5731 port->swap_pending = true;
5732 reinit_completion(&port->swap_complete);
5733 mutex_unlock(&port->lock);
5735 if (!wait_for_completion_timeout(&port->swap_complete,
5736 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
5739 ret = port->swap_status;
5744 mutex_unlock(&port->lock);
5746 mutex_unlock(&port->swap_lock);
5750 static int tcpm_vconn_set(struct typec_port *p, enum typec_role role)
5752 struct tcpm_port *port = typec_get_drvdata(p);
5755 mutex_lock(&port->swap_lock);
5756 mutex_lock(&port->lock);
5758 if (port->state != SRC_READY && port->state != SNK_READY) {
5763 if (role == port->vconn_role) {
5768 port->upcoming_state = VCONN_SWAP_SEND;
5769 ret = tcpm_ams_start(port, VCONN_SWAP);
5770 if (ret == -EAGAIN) {
5771 port->upcoming_state = INVALID_STATE;
5775 port->swap_status = 0;
5776 port->swap_pending = true;
5777 reinit_completion(&port->swap_complete);
5778 mutex_unlock(&port->lock);
5780 if (!wait_for_completion_timeout(&port->swap_complete,
5781 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
5784 ret = port->swap_status;
5789 mutex_unlock(&port->lock);
5791 mutex_unlock(&port->swap_lock);
5795 static int tcpm_try_role(struct typec_port *p, int role)
5797 struct tcpm_port *port = typec_get_drvdata(p);
5798 struct tcpc_dev *tcpc = port->tcpc;
5801 mutex_lock(&port->lock);
5803 ret = tcpc->try_role(tcpc, role);
5805 port->try_role = role;
5806 port->try_src_count = 0;
5807 port->try_snk_count = 0;
5808 mutex_unlock(&port->lock);
5813 static int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 req_op_curr)
5815 unsigned int target_mw;
5818 mutex_lock(&port->swap_lock);
5819 mutex_lock(&port->lock);
5821 if (!port->pps_data.active) {
5826 if (port->state != SNK_READY) {
5831 if (req_op_curr > port->pps_data.max_curr) {
5836 target_mw = (req_op_curr * port->supply_voltage) / 1000;
5837 if (target_mw < port->operating_snk_mw) {
5842 port->upcoming_state = SNK_NEGOTIATE_PPS_CAPABILITIES;
5843 ret = tcpm_ams_start(port, POWER_NEGOTIATION);
5844 if (ret == -EAGAIN) {
5845 port->upcoming_state = INVALID_STATE;
5849 /* Round down operating current to align with PPS valid steps */
5850 req_op_curr = req_op_curr - (req_op_curr % RDO_PROG_CURR_MA_STEP);
5852 reinit_completion(&port->pps_complete);
5853 port->pps_data.req_op_curr = req_op_curr;
5854 port->pps_status = 0;
5855 port->pps_pending = true;
5856 mutex_unlock(&port->lock);
5858 if (!wait_for_completion_timeout(&port->pps_complete,
5859 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
5862 ret = port->pps_status;
5867 mutex_unlock(&port->lock);
5869 mutex_unlock(&port->swap_lock);
5874 static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 req_out_volt)
5876 unsigned int target_mw;
5879 mutex_lock(&port->swap_lock);
5880 mutex_lock(&port->lock);
5882 if (!port->pps_data.active) {
5887 if (port->state != SNK_READY) {
5892 if (req_out_volt < port->pps_data.min_volt ||
5893 req_out_volt > port->pps_data.max_volt) {
5898 target_mw = (port->current_limit * req_out_volt) / 1000;
5899 if (target_mw < port->operating_snk_mw) {
5904 port->upcoming_state = SNK_NEGOTIATE_PPS_CAPABILITIES;
5905 ret = tcpm_ams_start(port, POWER_NEGOTIATION);
5906 if (ret == -EAGAIN) {
5907 port->upcoming_state = INVALID_STATE;
5911 /* Round down output voltage to align with PPS valid steps */
5912 req_out_volt = req_out_volt - (req_out_volt % RDO_PROG_VOLT_MV_STEP);
5914 reinit_completion(&port->pps_complete);
5915 port->pps_data.req_out_volt = req_out_volt;
5916 port->pps_status = 0;
5917 port->pps_pending = true;
5918 mutex_unlock(&port->lock);
5920 if (!wait_for_completion_timeout(&port->pps_complete,
5921 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
5924 ret = port->pps_status;
5929 mutex_unlock(&port->lock);
5931 mutex_unlock(&port->swap_lock);
5936 static int tcpm_pps_activate(struct tcpm_port *port, bool activate)
5940 mutex_lock(&port->swap_lock);
5941 mutex_lock(&port->lock);
5943 if (!port->pps_data.supported) {
5948 /* Trying to deactivate PPS when already deactivated so just bail */
5949 if (!port->pps_data.active && !activate)
5952 if (port->state != SNK_READY) {
5958 port->upcoming_state = SNK_NEGOTIATE_PPS_CAPABILITIES;
5960 port->upcoming_state = SNK_NEGOTIATE_CAPABILITIES;
5961 ret = tcpm_ams_start(port, POWER_NEGOTIATION);
5962 if (ret == -EAGAIN) {
5963 port->upcoming_state = INVALID_STATE;
5967 reinit_completion(&port->pps_complete);
5968 port->pps_status = 0;
5969 port->pps_pending = true;
5971 /* Trigger PPS request or move back to standard PDO contract */
5973 port->pps_data.req_out_volt = port->supply_voltage;
5974 port->pps_data.req_op_curr = port->current_limit;
5976 mutex_unlock(&port->lock);
5978 if (!wait_for_completion_timeout(&port->pps_complete,
5979 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
5982 ret = port->pps_status;
5987 mutex_unlock(&port->lock);
5989 mutex_unlock(&port->swap_lock);
5994 static void tcpm_init(struct tcpm_port *port)
5996 enum typec_cc_status cc1, cc2;
5998 port->tcpc->init(port->tcpc);
6000 tcpm_reset_port(port);
6004 * Should possibly wait for VBUS to settle if it was enabled locally
6005 * since tcpm_reset_port() will disable VBUS.
6007 port->vbus_present = port->tcpc->get_vbus(port->tcpc);
6008 if (port->vbus_present)
6009 port->vbus_never_low = true;
6012 * 1. When vbus_present is true, voltage on VBUS is already at VSAFE5V.
6013 * So implicitly vbus_vsafe0v = false.
6015 * 2. When vbus_present is false and TCPC does NOT support querying
6016 * vsafe0v status, then, it's best to assume vbus is at VSAFE0V i.e.
6017 * vbus_vsafe0v is true.
6019 * 3. When vbus_present is false and TCPC does support querying vsafe0v,
6020 * then, query tcpc for vsafe0v status.
6022 if (port->vbus_present)
6023 port->vbus_vsafe0v = false;
6024 else if (!port->tcpc->is_vbus_vsafe0v)
6025 port->vbus_vsafe0v = true;
6027 port->vbus_vsafe0v = port->tcpc->is_vbus_vsafe0v(port->tcpc);
6029 tcpm_set_state(port, tcpm_default_state(port), 0);
6031 if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
6032 _tcpm_cc_change(port, cc1, cc2);
6035 * Some adapters need a clean slate at startup, and won't recover
6036 * otherwise. So do not try to be fancy and force a clean disconnect.
6038 tcpm_set_state(port, PORT_RESET, 0);
6041 static int tcpm_port_type_set(struct typec_port *p, enum typec_port_type type)
6043 struct tcpm_port *port = typec_get_drvdata(p);
6045 mutex_lock(&port->lock);
6046 if (type == port->port_type)
6049 port->port_type = type;
6051 if (!port->connected) {
6052 tcpm_set_state(port, PORT_RESET, 0);
6053 } else if (type == TYPEC_PORT_SNK) {
6054 if (!(port->pwr_role == TYPEC_SINK &&
6055 port->data_role == TYPEC_DEVICE))
6056 tcpm_set_state(port, PORT_RESET, 0);
6057 } else if (type == TYPEC_PORT_SRC) {
6058 if (!(port->pwr_role == TYPEC_SOURCE &&
6059 port->data_role == TYPEC_HOST))
6060 tcpm_set_state(port, PORT_RESET, 0);
6064 mutex_unlock(&port->lock);
6068 static const struct typec_operations tcpm_ops = {
6069 .try_role = tcpm_try_role,
6070 .dr_set = tcpm_dr_set,
6071 .pr_set = tcpm_pr_set,
6072 .vconn_set = tcpm_vconn_set,
6073 .port_type_set = tcpm_port_type_set
6076 void tcpm_tcpc_reset(struct tcpm_port *port)
6078 mutex_lock(&port->lock);
6079 /* XXX: Maintain PD connection if possible? */
6081 mutex_unlock(&port->lock);
6083 EXPORT_SYMBOL_GPL(tcpm_tcpc_reset);
6085 static void tcpm_port_unregister_pd(struct tcpm_port *port)
6087 usb_power_delivery_unregister_capabilities(port->port_sink_caps);
6088 port->port_sink_caps = NULL;
6089 usb_power_delivery_unregister_capabilities(port->port_source_caps);
6090 port->port_source_caps = NULL;
6091 usb_power_delivery_unregister(port->pd);
6095 static int tcpm_port_register_pd(struct tcpm_port *port)
6097 struct usb_power_delivery_desc desc = { port->typec_caps.pd_revision };
6098 struct usb_power_delivery_capabilities_desc caps = { };
6099 struct usb_power_delivery_capabilities *cap;
6102 if (!port->nr_src_pdo && !port->nr_snk_pdo)
6105 port->pd = usb_power_delivery_register(port->dev, &desc);
6106 if (IS_ERR(port->pd)) {
6107 ret = PTR_ERR(port->pd);
6108 goto err_unregister;
6111 if (port->nr_src_pdo) {
6112 memcpy_and_pad(caps.pdo, sizeof(caps.pdo), port->src_pdo,
6113 port->nr_src_pdo * sizeof(u32), 0);
6114 caps.role = TYPEC_SOURCE;
6116 cap = usb_power_delivery_register_capabilities(port->pd, &caps);
6119 goto err_unregister;
6122 port->port_source_caps = cap;
6125 if (port->nr_snk_pdo) {
6126 memcpy_and_pad(caps.pdo, sizeof(caps.pdo), port->snk_pdo,
6127 port->nr_snk_pdo * sizeof(u32), 0);
6128 caps.role = TYPEC_SINK;
6130 cap = usb_power_delivery_register_capabilities(port->pd, &caps);
6133 goto err_unregister;
6136 port->port_sink_caps = cap;
6142 tcpm_port_unregister_pd(port);
6147 static int tcpm_fw_get_caps(struct tcpm_port *port,
6148 struct fwnode_handle *fwnode)
6150 const char *opmode_str;
6152 u32 mw, frs_current;
6158 * This fwnode has a "compatible" property, but is never populated as a
6159 * struct device. Instead we simply parse it to read the properties.
6160 * This it breaks fw_devlink=on. To maintain backward compatibility
6161 * with existing DT files, we work around this by deleting any
6162 * fwnode_links to/from this fwnode.
6164 fw_devlink_purge_absent_suppliers(fwnode);
6166 ret = typec_get_fw_cap(&port->typec_caps, fwnode);
6170 port->port_type = port->typec_caps.type;
6171 port->pd_supported = !fwnode_property_read_bool(fwnode, "pd-disable");
6173 port->slow_charger_loop = fwnode_property_read_bool(fwnode, "slow-charger-loop");
6174 if (port->port_type == TYPEC_PORT_SNK)
6177 /* Get Source PDOs for the PD port or Source Rp value for the non-PD port */
6178 if (port->pd_supported) {
6179 ret = fwnode_property_count_u32(fwnode, "source-pdos");
6185 port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
6186 ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
6187 port->src_pdo, port->nr_src_pdo);
6190 ret = tcpm_validate_caps(port, port->src_pdo, port->nr_src_pdo);
6194 ret = fwnode_property_read_string(fwnode, "typec-power-opmode", &opmode_str);
6197 ret = typec_find_pwr_opmode(opmode_str);
6200 port->src_rp = tcpm_pwr_opmode_to_rp(ret);
6203 if (port->port_type == TYPEC_PORT_SRC)
6207 port->self_powered = fwnode_property_read_bool(fwnode, "self-powered");
6209 if (!port->pd_supported)
6213 ret = fwnode_property_count_u32(fwnode, "sink-pdos");
6217 port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS);
6218 ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
6219 port->snk_pdo, port->nr_snk_pdo);
6220 if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo,
6224 if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0)
6226 port->operating_snk_mw = mw / 1000;
6228 /* FRS can only be supported by DRP ports */
6229 if (port->port_type == TYPEC_PORT_DRP) {
6230 ret = fwnode_property_read_u32(fwnode, "new-source-frs-typec-current",
6232 if (ret >= 0 && frs_current <= FRS_5V_3A)
6233 port->new_source_frs_current = frs_current;
6236 /* sink-vdos is optional */
6237 ret = fwnode_property_count_u32(fwnode, "sink-vdos");
6241 port->nr_snk_vdo = min(ret, VDO_MAX_OBJECTS);
6242 if (port->nr_snk_vdo) {
6243 ret = fwnode_property_read_u32_array(fwnode, "sink-vdos",
6250 /* If sink-vdos is found, sink-vdos-v1 is expected for backward compatibility. */
6251 if (port->nr_snk_vdo) {
6252 ret = fwnode_property_count_u32(fwnode, "sink-vdos-v1");
6258 port->nr_snk_vdo_v1 = min(ret, VDO_MAX_OBJECTS);
6259 ret = fwnode_property_read_u32_array(fwnode, "sink-vdos-v1",
6261 port->nr_snk_vdo_v1);
6269 /* Power Supply access to expose source power information */
6270 enum tcpm_psy_online_states {
6271 TCPM_PSY_OFFLINE = 0,
6272 TCPM_PSY_FIXED_ONLINE,
6273 TCPM_PSY_PROG_ONLINE,
6276 static enum power_supply_property tcpm_psy_props[] = {
6277 POWER_SUPPLY_PROP_USB_TYPE,
6278 POWER_SUPPLY_PROP_ONLINE,
6279 POWER_SUPPLY_PROP_VOLTAGE_MIN,
6280 POWER_SUPPLY_PROP_VOLTAGE_MAX,
6281 POWER_SUPPLY_PROP_VOLTAGE_NOW,
6282 POWER_SUPPLY_PROP_CURRENT_MAX,
6283 POWER_SUPPLY_PROP_CURRENT_NOW,
6286 static int tcpm_psy_get_online(struct tcpm_port *port,
6287 union power_supply_propval *val)
6289 if (port->vbus_charge) {
6290 if (port->pps_data.active)
6291 val->intval = TCPM_PSY_PROG_ONLINE;
6293 val->intval = TCPM_PSY_FIXED_ONLINE;
6295 val->intval = TCPM_PSY_OFFLINE;
6301 static int tcpm_psy_get_voltage_min(struct tcpm_port *port,
6302 union power_supply_propval *val)
6304 if (port->pps_data.active)
6305 val->intval = port->pps_data.min_volt * 1000;
6307 val->intval = port->supply_voltage * 1000;
6312 static int tcpm_psy_get_voltage_max(struct tcpm_port *port,
6313 union power_supply_propval *val)
6315 if (port->pps_data.active)
6316 val->intval = port->pps_data.max_volt * 1000;
6318 val->intval = port->supply_voltage * 1000;
6323 static int tcpm_psy_get_voltage_now(struct tcpm_port *port,
6324 union power_supply_propval *val)
6326 val->intval = port->supply_voltage * 1000;
6331 static int tcpm_psy_get_current_max(struct tcpm_port *port,
6332 union power_supply_propval *val)
6334 if (port->pps_data.active)
6335 val->intval = port->pps_data.max_curr * 1000;
6337 val->intval = port->current_limit * 1000;
6342 static int tcpm_psy_get_current_now(struct tcpm_port *port,
6343 union power_supply_propval *val)
6345 val->intval = port->current_limit * 1000;
6350 static int tcpm_psy_get_input_power_limit(struct tcpm_port *port,
6351 union power_supply_propval *val)
6353 unsigned int src_mv, src_ma, max_src_uw = 0;
6354 unsigned int i, tmp;
6356 for (i = 0; i < port->nr_source_caps; i++) {
6357 u32 pdo = port->source_caps[i];
6359 if (pdo_type(pdo) == PDO_TYPE_FIXED) {
6360 src_mv = pdo_fixed_voltage(pdo);
6361 src_ma = pdo_max_current(pdo);
6362 tmp = src_mv * src_ma;
6363 max_src_uw = tmp > max_src_uw ? tmp : max_src_uw;
6367 val->intval = max_src_uw;
6371 static int tcpm_psy_get_prop(struct power_supply *psy,
6372 enum power_supply_property psp,
6373 union power_supply_propval *val)
6375 struct tcpm_port *port = power_supply_get_drvdata(psy);
6379 case POWER_SUPPLY_PROP_USB_TYPE:
6380 val->intval = port->usb_type;
6382 case POWER_SUPPLY_PROP_ONLINE:
6383 ret = tcpm_psy_get_online(port, val);
6385 case POWER_SUPPLY_PROP_VOLTAGE_MIN:
6386 ret = tcpm_psy_get_voltage_min(port, val);
6388 case POWER_SUPPLY_PROP_VOLTAGE_MAX:
6389 ret = tcpm_psy_get_voltage_max(port, val);
6391 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
6392 ret = tcpm_psy_get_voltage_now(port, val);
6394 case POWER_SUPPLY_PROP_CURRENT_MAX:
6395 ret = tcpm_psy_get_current_max(port, val);
6397 case POWER_SUPPLY_PROP_CURRENT_NOW:
6398 ret = tcpm_psy_get_current_now(port, val);
6400 case POWER_SUPPLY_PROP_INPUT_POWER_LIMIT:
6401 tcpm_psy_get_input_power_limit(port, val);
6411 static int tcpm_psy_set_online(struct tcpm_port *port,
6412 const union power_supply_propval *val)
6416 switch (val->intval) {
6417 case TCPM_PSY_FIXED_ONLINE:
6418 ret = tcpm_pps_activate(port, false);
6420 case TCPM_PSY_PROG_ONLINE:
6421 ret = tcpm_pps_activate(port, true);
6431 static int tcpm_psy_set_prop(struct power_supply *psy,
6432 enum power_supply_property psp,
6433 const union power_supply_propval *val)
6435 struct tcpm_port *port = power_supply_get_drvdata(psy);
6439 * All the properties below are related to USB PD. The check needs to be
6440 * property specific when a non-pd related property is added.
6442 if (!port->pd_supported)
6446 case POWER_SUPPLY_PROP_ONLINE:
6447 ret = tcpm_psy_set_online(port, val);
6449 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
6450 if (val->intval < port->pps_data.min_volt * 1000 ||
6451 val->intval > port->pps_data.max_volt * 1000)
6454 ret = tcpm_pps_set_out_volt(port, val->intval / 1000);
6456 case POWER_SUPPLY_PROP_CURRENT_NOW:
6457 if (val->intval > port->pps_data.max_curr * 1000)
6460 ret = tcpm_pps_set_op_curr(port, val->intval / 1000);
6466 power_supply_changed(port->psy);
6470 static int tcpm_psy_prop_writeable(struct power_supply *psy,
6471 enum power_supply_property psp)
6474 case POWER_SUPPLY_PROP_ONLINE:
6475 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
6476 case POWER_SUPPLY_PROP_CURRENT_NOW:
6483 static enum power_supply_usb_type tcpm_psy_usb_types[] = {
6484 POWER_SUPPLY_USB_TYPE_C,
6485 POWER_SUPPLY_USB_TYPE_PD,
6486 POWER_SUPPLY_USB_TYPE_PD_PPS,
6489 static const char *tcpm_psy_name_prefix = "tcpm-source-psy-";
6491 static int devm_tcpm_psy_register(struct tcpm_port *port)
6493 struct power_supply_config psy_cfg = {};
6494 const char *port_dev_name = dev_name(port->dev);
6495 size_t psy_name_len = strlen(tcpm_psy_name_prefix) +
6496 strlen(port_dev_name) + 1;
6499 psy_cfg.drv_data = port;
6500 psy_cfg.fwnode = dev_fwnode(port->dev);
6501 psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL);
6505 snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix,
6507 port->psy_desc.name = psy_name;
6508 port->psy_desc.type = POWER_SUPPLY_TYPE_USB;
6509 port->psy_desc.usb_types = tcpm_psy_usb_types;
6510 port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types);
6511 port->psy_desc.properties = tcpm_psy_props;
6512 port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props);
6513 port->psy_desc.get_property = tcpm_psy_get_prop;
6514 port->psy_desc.set_property = tcpm_psy_set_prop;
6515 port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable;
6517 port->usb_type = POWER_SUPPLY_USB_TYPE_C;
6519 port->psy = devm_power_supply_register(port->dev, &port->psy_desc,
6522 return PTR_ERR_OR_ZERO(port->psy);
6525 static enum hrtimer_restart state_machine_timer_handler(struct hrtimer *timer)
6527 struct tcpm_port *port = container_of(timer, struct tcpm_port, state_machine_timer);
6529 if (port->registered)
6530 kthread_queue_work(port->wq, &port->state_machine);
6531 return HRTIMER_NORESTART;
6534 static enum hrtimer_restart vdm_state_machine_timer_handler(struct hrtimer *timer)
6536 struct tcpm_port *port = container_of(timer, struct tcpm_port, vdm_state_machine_timer);
6538 if (port->registered)
6539 kthread_queue_work(port->wq, &port->vdm_state_machine);
6540 return HRTIMER_NORESTART;
6543 static enum hrtimer_restart enable_frs_timer_handler(struct hrtimer *timer)
6545 struct tcpm_port *port = container_of(timer, struct tcpm_port, enable_frs_timer);
6547 if (port->registered)
6548 kthread_queue_work(port->wq, &port->enable_frs);
6549 return HRTIMER_NORESTART;
6552 static enum hrtimer_restart send_discover_timer_handler(struct hrtimer *timer)
6554 struct tcpm_port *port = container_of(timer, struct tcpm_port, send_discover_timer);
6556 if (port->registered)
6557 kthread_queue_work(port->wq, &port->send_discover_work);
6558 return HRTIMER_NORESTART;
6561 struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
6563 struct tcpm_port *port;
6566 if (!dev || !tcpc ||
6567 !tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc ||
6568 !tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus ||
6569 !tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit)
6570 return ERR_PTR(-EINVAL);
6572 port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
6574 return ERR_PTR(-ENOMEM);
6579 mutex_init(&port->lock);
6580 mutex_init(&port->swap_lock);
6582 port->wq = kthread_create_worker(0, dev_name(dev));
6583 if (IS_ERR(port->wq))
6584 return ERR_CAST(port->wq);
6585 sched_set_fifo(port->wq->task);
6587 kthread_init_work(&port->state_machine, tcpm_state_machine_work);
6588 kthread_init_work(&port->vdm_state_machine, vdm_state_machine_work);
6589 kthread_init_work(&port->event_work, tcpm_pd_event_handler);
6590 kthread_init_work(&port->enable_frs, tcpm_enable_frs_work);
6591 kthread_init_work(&port->send_discover_work, tcpm_send_discover_work);
6592 hrtimer_init(&port->state_machine_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
6593 port->state_machine_timer.function = state_machine_timer_handler;
6594 hrtimer_init(&port->vdm_state_machine_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
6595 port->vdm_state_machine_timer.function = vdm_state_machine_timer_handler;
6596 hrtimer_init(&port->enable_frs_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
6597 port->enable_frs_timer.function = enable_frs_timer_handler;
6598 hrtimer_init(&port->send_discover_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
6599 port->send_discover_timer.function = send_discover_timer_handler;
6601 spin_lock_init(&port->pd_event_lock);
6603 init_completion(&port->tx_complete);
6604 init_completion(&port->swap_complete);
6605 init_completion(&port->pps_complete);
6606 tcpm_debugfs_init(port);
6608 err = tcpm_fw_get_caps(port, tcpc->fwnode);
6610 goto out_destroy_wq;
6612 port->try_role = port->typec_caps.prefer_role;
6614 port->typec_caps.fwnode = tcpc->fwnode;
6615 port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */
6616 port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */
6617 port->typec_caps.svdm_version = SVDM_VER_2_0;
6618 port->typec_caps.driver_data = port;
6619 port->typec_caps.ops = &tcpm_ops;
6620 port->typec_caps.orientation_aware = 1;
6622 port->partner_desc.identity = &port->partner_ident;
6623 port->port_type = port->typec_caps.type;
6625 port->role_sw = usb_role_switch_get(port->dev);
6627 port->role_sw = fwnode_usb_role_switch_get(tcpc->fwnode);
6628 if (IS_ERR(port->role_sw)) {
6629 err = PTR_ERR(port->role_sw);
6630 goto out_destroy_wq;
6633 err = devm_tcpm_psy_register(port);
6635 goto out_role_sw_put;
6636 power_supply_changed(port->psy);
6638 err = tcpm_port_register_pd(port);
6640 goto out_role_sw_put;
6642 port->typec_caps.pd = port->pd;
6644 port->typec_port = typec_register_port(port->dev, &port->typec_caps);
6645 if (IS_ERR(port->typec_port)) {
6646 err = PTR_ERR(port->typec_port);
6647 goto out_unregister_pd;
6650 typec_port_register_altmodes(port->typec_port,
6651 &tcpm_altmode_ops, port,
6652 port->port_altmode, ALTMODE_DISCOVERY_MAX);
6653 port->registered = true;
6655 mutex_lock(&port->lock);
6657 mutex_unlock(&port->lock);
6659 tcpm_log(port, "%s: registered", dev_name(dev));
6663 tcpm_port_unregister_pd(port);
6665 usb_role_switch_put(port->role_sw);
6667 tcpm_debugfs_exit(port);
6668 kthread_destroy_worker(port->wq);
6669 return ERR_PTR(err);
6671 EXPORT_SYMBOL_GPL(tcpm_register_port);
6673 void tcpm_unregister_port(struct tcpm_port *port)
6677 port->registered = false;
6678 kthread_destroy_worker(port->wq);
6680 hrtimer_cancel(&port->send_discover_timer);
6681 hrtimer_cancel(&port->enable_frs_timer);
6682 hrtimer_cancel(&port->vdm_state_machine_timer);
6683 hrtimer_cancel(&port->state_machine_timer);
6685 tcpm_reset_port(port);
6687 tcpm_port_unregister_pd(port);
6689 for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++)
6690 typec_unregister_altmode(port->port_altmode[i]);
6691 typec_unregister_port(port->typec_port);
6692 usb_role_switch_put(port->role_sw);
6693 tcpm_debugfs_exit(port);
6695 EXPORT_SYMBOL_GPL(tcpm_unregister_port);
6697 MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>");
6698 MODULE_DESCRIPTION("USB Type-C Port Manager");
6699 MODULE_LICENSE("GPL");