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), \
111 S(VCONN_SWAP_SEND_SOFT_RESET), \
114 S(FR_SWAP_SEND_TIMEOUT), \
115 S(FR_SWAP_SNK_SRC_TRANSITION_TO_OFF), \
116 S(FR_SWAP_SNK_SRC_NEW_SINK_READY), \
117 S(FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED), \
122 S(SNK_TRY_WAIT_DEBOUNCE), \
123 S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \
125 S(SRC_TRYWAIT_DEBOUNCE), \
126 S(SRC_TRYWAIT_UNATTACHED), \
130 S(SRC_TRY_DEBOUNCE), \
132 S(SNK_TRYWAIT_DEBOUNCE), \
133 S(SNK_TRYWAIT_VBUS), \
136 S(GET_STATUS_SEND), \
137 S(GET_STATUS_SEND_TIMEOUT), \
138 S(GET_PPS_STATUS_SEND), \
139 S(GET_PPS_STATUS_SEND_TIMEOUT), \
142 S(GET_SINK_CAP_TIMEOUT), \
146 S(PORT_RESET_WAIT_OFF), \
151 S(SRC_VDM_IDENTITY_REQUEST)
153 #define FOREACH_AMS(S) \
155 S(POWER_NEGOTIATION), \
160 S(GET_SOURCE_CAPABILITIES), \
161 S(GET_SINK_CAPABILITIES), \
162 S(POWER_ROLE_SWAP), \
167 S(GETTING_SOURCE_EXTENDED_CAPABILITIES),\
168 S(GETTING_SOURCE_SINK_STATUS), \
169 S(GETTING_BATTERY_CAPABILITIES), \
170 S(GETTING_BATTERY_STATUS), \
171 S(GETTING_MANUFACTURER_INFORMATION), \
173 S(FIRMWARE_UPDATE), \
174 S(DISCOVER_IDENTITY), \
175 S(SOURCE_STARTUP_CABLE_PLUG_DISCOVER_IDENTITY), \
178 S(DFP_TO_UFP_ENTER_MODE), \
179 S(DFP_TO_UFP_EXIT_MODE), \
180 S(DFP_TO_CABLE_PLUG_ENTER_MODE), \
181 S(DFP_TO_CABLE_PLUG_EXIT_MODE), \
184 S(UNSTRUCTURED_VDMS), \
185 S(STRUCTURED_VDMS), \
189 #define GENERATE_ENUM(e) e
190 #define GENERATE_STRING(s) #s
193 FOREACH_STATE(GENERATE_ENUM
)
196 static const char * const tcpm_states
[] = {
197 FOREACH_STATE(GENERATE_STRING
)
201 FOREACH_AMS(GENERATE_ENUM
)
204 static const char * const tcpm_ams_str
[] = {
205 FOREACH_AMS(GENERATE_STRING
)
209 VDM_STATE_ERR_BUSY
= -3,
210 VDM_STATE_ERR_SEND
= -2,
211 VDM_STATE_ERR_TMOUT
= -1,
213 /* Anything >0 represents an active state */
216 VDM_STATE_WAIT_RSP_BUSY
= 3,
217 VDM_STATE_SEND_MESSAGE
= 4,
220 enum pd_msg_request
{
224 PD_MSG_CTRL_NOT_SUPP
,
225 PD_MSG_DATA_SINK_CAP
,
226 PD_MSG_DATA_SOURCE_CAP
,
231 ADEV_NOTIFY_USB_AND_QUEUE_VDM
,
233 ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL
,
238 * Initial current capability of the new source when vSafe5V is applied during PD3.0 Fast Role Swap.
239 * Based on "Table 6-14 Fixed Supply PDO - Sink" of "USB Power Delivery Specification Revision 3.0,
242 enum frs_typec_current
{
249 /* Events from low level driver */
251 #define TCPM_CC_EVENT BIT(0)
252 #define TCPM_VBUS_EVENT BIT(1)
253 #define TCPM_RESET_EVENT BIT(2)
254 #define TCPM_FRS_EVENT BIT(3)
255 #define TCPM_SOURCING_VBUS BIT(4)
256 #define TCPM_PORT_CLEAN BIT(5)
257 #define TCPM_PORT_ERROR BIT(6)
259 #define LOG_BUFFER_ENTRIES 1024
260 #define LOG_BUFFER_ENTRY_SIZE 128
262 /* Alternate mode support */
264 #define SVID_DISCOVERY_MAX 16
265 #define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX)
267 #define GET_SINK_CAP_RETRY_MS 100
268 #define SEND_DISCOVER_RETRY_MS 100
270 struct pd_mode_data
{
271 int svid_index
; /* current SVID index */
273 u16 svids
[SVID_DISCOVERY_MAX
];
274 int altmodes
; /* number of alternate modes */
275 struct typec_altmode_desc altmode_desc
[ALTMODE_DISCOVERY_MAX
];
279 * @min_volt: Actual min voltage at the local port
280 * @req_min_volt: Requested min voltage to the port partner
281 * @max_volt: Actual max voltage at the local port
282 * @req_max_volt: Requested max voltage to the port partner
283 * @max_curr: Actual max current at the local port
284 * @req_max_curr: Requested max current of the port partner
285 * @req_out_volt: Requested output voltage to the port partner
286 * @req_op_curr: Requested operating current to the port partner
287 * @supported: Parter has at least one APDO hence supports PPS
288 * @active: PPS mode is active
304 struct usb_power_delivery
*pd
;
305 struct usb_power_delivery_capabilities
*source_cap
;
306 struct usb_power_delivery_capabilities_desc source_desc
;
307 struct usb_power_delivery_capabilities
*sink_cap
;
308 struct usb_power_delivery_capabilities_desc sink_desc
;
309 unsigned int operating_snk_mw
;
315 struct mutex lock
; /* tcpm state machine lock */
316 struct kthread_worker
*wq
;
318 struct typec_capability typec_caps
;
319 struct typec_port
*typec_port
;
321 struct tcpc_dev
*tcpc
;
322 struct usb_role_switch
*role_sw
;
324 enum typec_role vconn_role
;
325 enum typec_role pwr_role
;
326 enum typec_data_role data_role
;
327 enum typec_pwr_opmode pwr_opmode
;
329 struct usb_pd_identity partner_ident
;
330 struct typec_partner_desc partner_desc
;
331 struct typec_partner
*partner
;
333 struct usb_pd_identity cable_ident
;
334 struct typec_cable_desc cable_desc
;
335 struct typec_cable
*cable
;
336 struct typec_plug_desc plug_prime_desc
;
337 struct typec_plug
*plug_prime
;
339 enum typec_cc_status cc_req
;
340 enum typec_cc_status src_rp
; /* work only if pd_supported == false */
342 enum typec_cc_status cc1
;
343 enum typec_cc_status cc2
;
344 enum typec_cc_polarity polarity
;
350 enum typec_port_type port_type
;
353 * Set to true when vbus is greater than VSAFE5V min.
354 * Set to false when vbus falls below vSinkDisconnect max threshold.
359 * Set to true when vbus is less than VSAFE0V max.
360 * Set to false when vbus is greater than VSAFE0V max.
368 /* Set to true when Discover_Identity Command is expected to be sent in Ready states. */
376 enum pd_msg_request queued_message
;
378 enum tcpm_state enter_state
;
379 enum tcpm_state prev_state
;
380 enum tcpm_state state
;
381 enum tcpm_state delayed_state
;
382 ktime_t delayed_runtime
;
383 unsigned long delay_ms
;
385 spinlock_t pd_event_lock
;
388 struct kthread_work event_work
;
389 struct hrtimer state_machine_timer
;
390 struct kthread_work state_machine
;
391 struct hrtimer vdm_state_machine_timer
;
392 struct kthread_work vdm_state_machine
;
393 struct hrtimer enable_frs_timer
;
394 struct kthread_work enable_frs
;
395 struct hrtimer send_discover_timer
;
396 struct kthread_work send_discover_work
;
397 bool state_machine_running
;
398 /* Set to true when VDM State Machine has following actions. */
401 struct completion tx_complete
;
402 enum tcpm_transmit_status tx_status
;
404 struct mutex swap_lock
; /* swap command lock */
406 bool non_pd_role_swap
;
407 struct completion swap_complete
;
410 unsigned int negotiated_rev
;
411 unsigned int message_id
;
412 unsigned int caps_count
;
413 unsigned int hard_reset_count
;
415 bool explicit_contract
;
416 unsigned int rx_msgid
;
419 struct usb_power_delivery
**pds
;
420 struct pd_data
**pd_list
;
421 struct usb_power_delivery_capabilities
*port_source_caps
;
422 struct usb_power_delivery_capabilities
*port_sink_caps
;
423 struct usb_power_delivery
*partner_pd
;
424 struct usb_power_delivery_capabilities
*partner_source_caps
;
425 struct usb_power_delivery_capabilities
*partner_sink_caps
;
426 struct usb_power_delivery
*selected_pd
;
428 /* Partner capabilities/requests */
430 u32 source_caps
[PDO_MAX_OBJECTS
];
431 unsigned int nr_source_caps
;
432 u32 sink_caps
[PDO_MAX_OBJECTS
];
433 unsigned int nr_sink_caps
;
435 /* Local capabilities */
436 unsigned int pd_count
;
437 u32 src_pdo
[PDO_MAX_OBJECTS
];
438 unsigned int nr_src_pdo
;
439 u32 snk_pdo
[PDO_MAX_OBJECTS
];
440 unsigned int nr_snk_pdo
;
441 u32 snk_vdo_v1
[VDO_MAX_OBJECTS
];
442 unsigned int nr_snk_vdo_v1
;
443 u32 snk_vdo
[VDO_MAX_OBJECTS
];
444 unsigned int nr_snk_vdo
;
446 unsigned int operating_snk_mw
;
447 bool update_sink_caps
;
449 /* Requested current / voltage to the port partner */
450 u32 req_current_limit
;
451 u32 req_supply_voltage
;
452 /* Actual current / voltage limit of the local port */
456 /* Used to export TA voltage and current */
457 struct power_supply
*psy
;
458 struct power_supply_desc psy_desc
;
459 enum power_supply_usb_type usb_type
;
463 /* PD state for Vendor Defined Messages */
464 enum vdm_states vdm_state
;
466 /* next Vendor Defined Message to send */
467 u32 vdo_data
[VDO_MAX_SIZE
];
469 /* VDO to retry if UFP responder replied busy */
473 struct pd_pps_data pps_data
;
474 struct completion pps_complete
;
478 /* Alternate mode data */
479 struct pd_mode_data mode_data
;
480 struct pd_mode_data mode_data_prime
;
481 struct typec_altmode
*partner_altmode
[ALTMODE_DISCOVERY_MAX
];
482 struct typec_altmode
*plug_prime_altmode
[ALTMODE_DISCOVERY_MAX
];
483 struct typec_altmode
*port_altmode
[ALTMODE_DISCOVERY_MAX
];
485 /* Deadline in jiffies to exit src_try_wait state */
486 unsigned long max_wait
;
488 /* port belongs to a self powered device */
492 enum frs_typec_current new_source_frs_current
;
494 /* Sink caps have been queried */
497 /* Collision Avoidance and Atomic Message Sequence */
498 enum tcpm_state upcoming_state
;
500 enum tcpm_ams next_ams
;
503 /* Auto vbus discharge status */
504 bool auto_vbus_discharge_enabled
;
507 * When set, port requests PD_P_SNK_STDBY_MW upon entering SNK_DISCOVERY and
508 * the actual current limit after RX of PD_CTRL_PSRDY for PD link,
509 * SNK_READY for non-pd link.
511 bool slow_charger_loop
;
514 * When true indicates that the lower level drivers indicate potential presence
515 * of contaminant in the connector pins based on the tcpm state machine
518 bool potential_contaminant
;
520 /* SOP* Related Fields */
522 * Flag to determine if SOP' Discover Identity is available. The flag
523 * is set if Discover Identity on SOP' does not immediately follow
524 * Discover Identity on SOP.
526 bool send_discover_prime
;
528 * tx_sop_type determines which SOP* a message is being sent on.
529 * For messages that are queued and not sent immediately such as in
530 * tcpm_queue_message or messages that send after state changes,
531 * the tx_sop_type is set accordingly.
533 enum tcpm_transmit_type tx_sop_type
;
535 * Prior to discovering the port partner's Specification Revision, the
536 * Vconn source and cable plug will use the lower of their two revisions.
538 * When the port partner's Specification Revision is discovered, the following
539 * rules are put in place.
540 * 1. If the cable revision (1) is lower than the revision negotiated
541 * between the port and partner (2), the port and partner will communicate
542 * on revision (2), but the port and cable will communicate on revision (1).
543 * 2. If the cable revision (1) is higher than the revision negotiated
544 * between the port and partner (2), the port and partner will communicate
545 * on revision (2), and the port and cable will communicate on revision (2)
548 unsigned int negotiated_rev_prime
;
550 * Each SOP* type must maintain their own tx and rx message IDs
552 unsigned int message_id_prime
;
553 unsigned int rx_msgid_prime
;
554 #ifdef CONFIG_DEBUG_FS
555 struct dentry
*dentry
;
556 struct mutex logbuffer_lock
; /* log buffer access lock */
559 u8
*logbuffer
[LOG_BUFFER_ENTRIES
];
564 struct kthread_work work
;
565 struct tcpm_port
*port
;
566 struct pd_message msg
;
567 enum tcpm_transmit_type rx_sop_type
;
570 static const char * const pd_rev
[] = {
576 #define tcpm_cc_is_sink(cc) \
577 ((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \
578 (cc) == TYPEC_CC_RP_3_0)
580 /* As long as cc is pulled up, we can consider it as sink. */
581 #define tcpm_port_is_sink(port) \
582 (tcpm_cc_is_sink((port)->cc1) || tcpm_cc_is_sink((port)->cc2))
584 #define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD)
585 #define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA)
586 #define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN)
588 #define tcpm_port_is_source(port) \
589 ((tcpm_cc_is_source((port)->cc1) && \
590 !tcpm_cc_is_source((port)->cc2)) || \
591 (tcpm_cc_is_source((port)->cc2) && \
592 !tcpm_cc_is_source((port)->cc1)))
594 #define tcpm_port_is_debug(port) \
595 (tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2))
597 #define tcpm_port_is_audio(port) \
598 (tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2))
600 #define tcpm_port_is_audio_detached(port) \
601 ((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \
602 (tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1)))
604 #define tcpm_try_snk(port) \
605 ((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \
606 (port)->port_type == TYPEC_PORT_DRP)
608 #define tcpm_try_src(port) \
609 ((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \
610 (port)->port_type == TYPEC_PORT_DRP)
612 #define tcpm_data_role_for_source(port) \
613 ((port)->typec_caps.data == TYPEC_PORT_UFP ? \
614 TYPEC_DEVICE : TYPEC_HOST)
616 #define tcpm_data_role_for_sink(port) \
617 ((port)->typec_caps.data == TYPEC_PORT_DFP ? \
618 TYPEC_HOST : TYPEC_DEVICE)
620 #define tcpm_sink_tx_ok(port) \
621 (tcpm_port_is_sink(port) && \
622 ((port)->cc1 == TYPEC_CC_RP_3_0 || (port)->cc2 == TYPEC_CC_RP_3_0))
624 #define tcpm_wait_for_discharge(port) \
625 (((port)->auto_vbus_discharge_enabled && !(port)->vbus_vsafe0v) ? PD_T_SAFE_0V : 0)
627 static enum tcpm_state
tcpm_default_state(struct tcpm_port
*port
)
629 if (port
->port_type
== TYPEC_PORT_DRP
) {
630 if (port
->try_role
== TYPEC_SINK
)
631 return SNK_UNATTACHED
;
632 else if (port
->try_role
== TYPEC_SOURCE
)
633 return SRC_UNATTACHED
;
634 /* Fall through to return SRC_UNATTACHED */
635 } else if (port
->port_type
== TYPEC_PORT_SNK
) {
636 return SNK_UNATTACHED
;
638 return SRC_UNATTACHED
;
641 static bool tcpm_port_is_disconnected(struct tcpm_port
*port
)
643 return (!port
->attached
&& port
->cc1
== TYPEC_CC_OPEN
&&
644 port
->cc2
== TYPEC_CC_OPEN
) ||
645 (port
->attached
&& ((port
->polarity
== TYPEC_POLARITY_CC1
&&
646 port
->cc1
== TYPEC_CC_OPEN
) ||
647 (port
->polarity
== TYPEC_POLARITY_CC2
&&
648 port
->cc2
== TYPEC_CC_OPEN
)));
655 #ifdef CONFIG_DEBUG_FS
657 static bool tcpm_log_full(struct tcpm_port
*port
)
659 return port
->logbuffer_tail
==
660 (port
->logbuffer_head
+ 1) % LOG_BUFFER_ENTRIES
;
664 static void _tcpm_log(struct tcpm_port
*port
, const char *fmt
, va_list args
)
666 char tmpbuffer
[LOG_BUFFER_ENTRY_SIZE
];
667 u64 ts_nsec
= local_clock();
668 unsigned long rem_nsec
;
670 mutex_lock(&port
->logbuffer_lock
);
671 if (!port
->logbuffer
[port
->logbuffer_head
]) {
672 port
->logbuffer
[port
->logbuffer_head
] =
673 kzalloc(LOG_BUFFER_ENTRY_SIZE
, GFP_KERNEL
);
674 if (!port
->logbuffer
[port
->logbuffer_head
]) {
675 mutex_unlock(&port
->logbuffer_lock
);
680 vsnprintf(tmpbuffer
, sizeof(tmpbuffer
), fmt
, args
);
682 if (tcpm_log_full(port
)) {
683 port
->logbuffer_head
= max(port
->logbuffer_head
- 1, 0);
684 strcpy(tmpbuffer
, "overflow");
687 if (port
->logbuffer_head
< 0 ||
688 port
->logbuffer_head
>= LOG_BUFFER_ENTRIES
) {
690 "Bad log buffer index %d\n", port
->logbuffer_head
);
694 if (!port
->logbuffer
[port
->logbuffer_head
]) {
696 "Log buffer index %d is NULL\n", port
->logbuffer_head
);
700 rem_nsec
= do_div(ts_nsec
, 1000000000);
701 scnprintf(port
->logbuffer
[port
->logbuffer_head
],
702 LOG_BUFFER_ENTRY_SIZE
, "[%5lu.%06lu] %s",
703 (unsigned long)ts_nsec
, rem_nsec
/ 1000,
705 port
->logbuffer_head
= (port
->logbuffer_head
+ 1) % LOG_BUFFER_ENTRIES
;
708 mutex_unlock(&port
->logbuffer_lock
);
712 static void tcpm_log(struct tcpm_port
*port
, const char *fmt
, ...)
716 /* Do not log while disconnected and unattached */
717 if (tcpm_port_is_disconnected(port
) &&
718 (port
->state
== SRC_UNATTACHED
|| port
->state
== SNK_UNATTACHED
||
719 port
->state
== TOGGLING
|| port
->state
== CHECK_CONTAMINANT
))
723 _tcpm_log(port
, fmt
, args
);
728 static void tcpm_log_force(struct tcpm_port
*port
, const char *fmt
, ...)
733 _tcpm_log(port
, fmt
, args
);
737 static void tcpm_log_source_caps(struct tcpm_port
*port
)
741 for (i
= 0; i
< port
->nr_source_caps
; i
++) {
742 u32 pdo
= port
->source_caps
[i
];
743 enum pd_pdo_type type
= pdo_type(pdo
);
748 scnprintf(msg
, sizeof(msg
),
749 "%u mV, %u mA [%s%s%s%s%s%s]",
750 pdo_fixed_voltage(pdo
),
751 pdo_max_current(pdo
),
752 (pdo
& PDO_FIXED_DUAL_ROLE
) ?
754 (pdo
& PDO_FIXED_SUSPEND
) ?
756 (pdo
& PDO_FIXED_HIGHER_CAP
) ?
758 (pdo
& PDO_FIXED_USB_COMM
) ?
760 (pdo
& PDO_FIXED_DATA_SWAP
) ?
762 (pdo
& PDO_FIXED_EXTPOWER
) ?
766 scnprintf(msg
, sizeof(msg
),
768 pdo_min_voltage(pdo
),
769 pdo_max_voltage(pdo
),
770 pdo_max_current(pdo
));
773 scnprintf(msg
, sizeof(msg
),
775 pdo_min_voltage(pdo
),
776 pdo_max_voltage(pdo
),
780 if (pdo_apdo_type(pdo
) == APDO_TYPE_PPS
)
781 scnprintf(msg
, sizeof(msg
),
783 pdo_pps_apdo_min_voltage(pdo
),
784 pdo_pps_apdo_max_voltage(pdo
),
785 pdo_pps_apdo_max_current(pdo
));
787 strcpy(msg
, "undefined APDO");
790 strcpy(msg
, "undefined");
793 tcpm_log(port
, " PDO %d: type %d, %s",
798 static int tcpm_debug_show(struct seq_file
*s
, void *v
)
800 struct tcpm_port
*port
= s
->private;
803 mutex_lock(&port
->logbuffer_lock
);
804 tail
= port
->logbuffer_tail
;
805 while (tail
!= port
->logbuffer_head
) {
806 seq_printf(s
, "%s\n", port
->logbuffer
[tail
]);
807 tail
= (tail
+ 1) % LOG_BUFFER_ENTRIES
;
809 if (!seq_has_overflowed(s
))
810 port
->logbuffer_tail
= tail
;
811 mutex_unlock(&port
->logbuffer_lock
);
815 DEFINE_SHOW_ATTRIBUTE(tcpm_debug
);
817 static void tcpm_debugfs_init(struct tcpm_port
*port
)
821 mutex_init(&port
->logbuffer_lock
);
822 snprintf(name
, NAME_MAX
, "tcpm-%s", dev_name(port
->dev
));
823 port
->dentry
= debugfs_create_dir(name
, usb_debug_root
);
824 debugfs_create_file("log", S_IFREG
| 0444, port
->dentry
, port
,
828 static void tcpm_debugfs_exit(struct tcpm_port
*port
)
832 mutex_lock(&port
->logbuffer_lock
);
833 for (i
= 0; i
< LOG_BUFFER_ENTRIES
; i
++) {
834 kfree(port
->logbuffer
[i
]);
835 port
->logbuffer
[i
] = NULL
;
837 mutex_unlock(&port
->logbuffer_lock
);
839 debugfs_remove(port
->dentry
);
845 static void tcpm_log(const struct tcpm_port
*port
, const char *fmt
, ...) { }
847 static void tcpm_log_force(struct tcpm_port
*port
, const char *fmt
, ...) { }
848 static void tcpm_log_source_caps(struct tcpm_port
*port
) { }
849 static void tcpm_debugfs_init(const struct tcpm_port
*port
) { }
850 static void tcpm_debugfs_exit(const struct tcpm_port
*port
) { }
854 static void tcpm_set_cc(struct tcpm_port
*port
, enum typec_cc_status cc
)
856 tcpm_log(port
, "cc:=%d", cc
);
858 port
->tcpc
->set_cc(port
->tcpc
, cc
);
861 static int tcpm_enable_auto_vbus_discharge(struct tcpm_port
*port
, bool enable
)
865 if (port
->tcpc
->enable_auto_vbus_discharge
) {
866 ret
= port
->tcpc
->enable_auto_vbus_discharge(port
->tcpc
, enable
);
867 tcpm_log_force(port
, "%s vbus discharge ret:%d", enable
? "enable" : "disable",
870 port
->auto_vbus_discharge_enabled
= enable
;
876 static void tcpm_apply_rc(struct tcpm_port
*port
)
879 * TCPCI: Move to APPLY_RC state to prevent disconnect during PR_SWAP
880 * when Vbus auto discharge on disconnect is enabled.
882 if (port
->tcpc
->enable_auto_vbus_discharge
&& port
->tcpc
->apply_rc
) {
883 tcpm_log(port
, "Apply_RC");
884 port
->tcpc
->apply_rc(port
->tcpc
, port
->cc_req
, port
->polarity
);
885 tcpm_enable_auto_vbus_discharge(port
, false);
890 * Determine RP value to set based on maximum current supported
891 * by a port if configured as source.
892 * Returns CC value to report to link partner.
894 static enum typec_cc_status
tcpm_rp_cc(struct tcpm_port
*port
)
896 const u32
*src_pdo
= port
->src_pdo
;
897 int nr_pdo
= port
->nr_src_pdo
;
900 if (!port
->pd_supported
)
904 * Search for first entry with matching voltage.
905 * It should report the maximum supported current.
907 for (i
= 0; i
< nr_pdo
; i
++) {
908 const u32 pdo
= src_pdo
[i
];
910 if (pdo_type(pdo
) == PDO_TYPE_FIXED
&&
911 pdo_fixed_voltage(pdo
) == 5000) {
912 unsigned int curr
= pdo_max_current(pdo
);
915 return TYPEC_CC_RP_3_0
;
916 else if (curr
>= 1500)
917 return TYPEC_CC_RP_1_5
;
918 return TYPEC_CC_RP_DEF
;
922 return TYPEC_CC_RP_DEF
;
925 static void tcpm_ams_finish(struct tcpm_port
*port
)
927 tcpm_log(port
, "AMS %s finished", tcpm_ams_str
[port
->ams
]);
929 if (port
->pd_capable
&& port
->pwr_role
== TYPEC_SOURCE
) {
930 if (port
->negotiated_rev
>= PD_REV30
)
931 tcpm_set_cc(port
, SINK_TX_OK
);
933 tcpm_set_cc(port
, SINK_TX_NG
);
934 } else if (port
->pwr_role
== TYPEC_SOURCE
) {
935 tcpm_set_cc(port
, tcpm_rp_cc(port
));
938 port
->in_ams
= false;
939 port
->ams
= NONE_AMS
;
942 static int tcpm_pd_transmit(struct tcpm_port
*port
,
943 enum tcpm_transmit_type tx_sop_type
,
944 const struct pd_message
*msg
)
946 unsigned long timeout
;
948 unsigned int negotiated_rev
;
950 switch (tx_sop_type
) {
951 case TCPC_TX_SOP_PRIME
:
952 negotiated_rev
= port
->negotiated_rev_prime
;
956 negotiated_rev
= port
->negotiated_rev
;
961 tcpm_log(port
, "PD TX, header: %#x", le16_to_cpu(msg
->header
));
963 tcpm_log(port
, "PD TX, type: %#x", tx_sop_type
);
965 reinit_completion(&port
->tx_complete
);
966 ret
= port
->tcpc
->pd_transmit(port
->tcpc
, tx_sop_type
, msg
, negotiated_rev
);
970 mutex_unlock(&port
->lock
);
971 timeout
= wait_for_completion_timeout(&port
->tx_complete
,
972 msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT
));
973 mutex_lock(&port
->lock
);
977 switch (port
->tx_status
) {
978 case TCPC_TX_SUCCESS
:
979 switch (tx_sop_type
) {
980 case TCPC_TX_SOP_PRIME
:
981 port
->message_id_prime
= (port
->message_id_prime
+ 1) &
986 port
->message_id
= (port
->message_id
+ 1) &
991 * USB PD rev 2.0, 8.3.2.2.1:
992 * USB PD rev 3.0, 8.3.2.1.3:
993 * "... Note that every AMS is Interruptible until the first
994 * Message in the sequence has been successfully sent (GoodCRC
995 * Message received)."
997 if (port
->ams
!= NONE_AMS
)
1000 case TCPC_TX_DISCARDED
:
1003 case TCPC_TX_FAILED
:
1009 /* Some AMS don't expect responses. Finish them here. */
1010 if (port
->ams
== ATTENTION
|| port
->ams
== SOURCE_ALERT
)
1011 tcpm_ams_finish(port
);
1016 void tcpm_pd_transmit_complete(struct tcpm_port
*port
,
1017 enum tcpm_transmit_status status
)
1019 tcpm_log(port
, "PD TX complete, status: %u", status
);
1020 port
->tx_status
= status
;
1021 complete(&port
->tx_complete
);
1023 EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete
);
1025 static int tcpm_mux_set(struct tcpm_port
*port
, int state
,
1026 enum usb_role usb_role
,
1027 enum typec_orientation orientation
)
1031 tcpm_log(port
, "Requesting mux state %d, usb-role %d, orientation %d",
1032 state
, usb_role
, orientation
);
1034 ret
= typec_set_orientation(port
->typec_port
, orientation
);
1038 if (port
->role_sw
) {
1039 ret
= usb_role_switch_set_role(port
->role_sw
, usb_role
);
1044 return typec_set_mode(port
->typec_port
, state
);
1047 static int tcpm_set_polarity(struct tcpm_port
*port
,
1048 enum typec_cc_polarity polarity
)
1052 tcpm_log(port
, "polarity %d", polarity
);
1054 ret
= port
->tcpc
->set_polarity(port
->tcpc
, polarity
);
1058 port
->polarity
= polarity
;
1063 static int tcpm_set_vconn(struct tcpm_port
*port
, bool enable
)
1067 tcpm_log(port
, "vconn:=%d", enable
);
1069 ret
= port
->tcpc
->set_vconn(port
->tcpc
, enable
);
1071 port
->vconn_role
= enable
? TYPEC_SOURCE
: TYPEC_SINK
;
1072 typec_set_vconn_role(port
->typec_port
, port
->vconn_role
);
1078 static u32
tcpm_get_current_limit(struct tcpm_port
*port
)
1080 enum typec_cc_status cc
;
1083 cc
= port
->polarity
? port
->cc2
: port
->cc1
;
1085 case TYPEC_CC_RP_1_5
:
1088 case TYPEC_CC_RP_3_0
:
1091 case TYPEC_CC_RP_DEF
:
1093 if (port
->tcpc
->get_current_limit
)
1094 limit
= port
->tcpc
->get_current_limit(port
->tcpc
);
1103 static int tcpm_set_current_limit(struct tcpm_port
*port
, u32 max_ma
, u32 mv
)
1105 int ret
= -EOPNOTSUPP
;
1107 tcpm_log(port
, "Setting voltage/current limit %u mV %u mA", mv
, max_ma
);
1109 port
->supply_voltage
= mv
;
1110 port
->current_limit
= max_ma
;
1111 power_supply_changed(port
->psy
);
1113 if (port
->tcpc
->set_current_limit
)
1114 ret
= port
->tcpc
->set_current_limit(port
->tcpc
, max_ma
, mv
);
1119 static int tcpm_set_attached_state(struct tcpm_port
*port
, bool attached
)
1121 return port
->tcpc
->set_roles(port
->tcpc
, attached
, port
->pwr_role
,
1125 static int tcpm_set_roles(struct tcpm_port
*port
, bool attached
,
1126 enum typec_role role
, enum typec_data_role data
)
1128 enum typec_orientation orientation
;
1129 enum usb_role usb_role
;
1132 if (port
->polarity
== TYPEC_POLARITY_CC1
)
1133 orientation
= TYPEC_ORIENTATION_NORMAL
;
1135 orientation
= TYPEC_ORIENTATION_REVERSE
;
1137 if (port
->typec_caps
.data
== TYPEC_PORT_DRD
) {
1138 if (data
== TYPEC_HOST
)
1139 usb_role
= USB_ROLE_HOST
;
1141 usb_role
= USB_ROLE_DEVICE
;
1142 } else if (port
->typec_caps
.data
== TYPEC_PORT_DFP
) {
1143 if (data
== TYPEC_HOST
) {
1144 if (role
== TYPEC_SOURCE
)
1145 usb_role
= USB_ROLE_HOST
;
1147 usb_role
= USB_ROLE_NONE
;
1152 if (data
== TYPEC_DEVICE
) {
1153 if (role
== TYPEC_SINK
)
1154 usb_role
= USB_ROLE_DEVICE
;
1156 usb_role
= USB_ROLE_NONE
;
1162 ret
= tcpm_mux_set(port
, TYPEC_STATE_USB
, usb_role
, orientation
);
1166 ret
= port
->tcpc
->set_roles(port
->tcpc
, attached
, role
, data
);
1170 if (port
->tcpc
->set_orientation
) {
1171 ret
= port
->tcpc
->set_orientation(port
->tcpc
, orientation
);
1176 port
->pwr_role
= role
;
1177 port
->data_role
= data
;
1178 typec_set_data_role(port
->typec_port
, data
);
1179 typec_set_pwr_role(port
->typec_port
, role
);
1184 static int tcpm_set_pwr_role(struct tcpm_port
*port
, enum typec_role role
)
1188 ret
= port
->tcpc
->set_roles(port
->tcpc
, true, role
,
1193 port
->pwr_role
= role
;
1194 typec_set_pwr_role(port
->typec_port
, role
);
1200 * Transform the PDO to be compliant to PD rev2.0.
1201 * Return 0 if the PDO type is not defined in PD rev2.0.
1202 * Otherwise, return the converted PDO.
1204 static u32
tcpm_forge_legacy_pdo(struct tcpm_port
*port
, u32 pdo
, enum typec_role role
)
1206 switch (pdo_type(pdo
)) {
1207 case PDO_TYPE_FIXED
:
1208 if (role
== TYPEC_SINK
)
1209 return pdo
& ~PDO_FIXED_FRS_CURR_MASK
;
1211 return pdo
& ~PDO_FIXED_UNCHUNK_EXT
;
1221 static int tcpm_pd_send_source_caps(struct tcpm_port
*port
)
1223 struct pd_message msg
;
1225 unsigned int i
, nr_pdo
= 0;
1227 memset(&msg
, 0, sizeof(msg
));
1229 for (i
= 0; i
< port
->nr_src_pdo
; i
++) {
1230 if (port
->negotiated_rev
>= PD_REV30
) {
1231 msg
.payload
[nr_pdo
++] = cpu_to_le32(port
->src_pdo
[i
]);
1233 pdo
= tcpm_forge_legacy_pdo(port
, port
->src_pdo
[i
], TYPEC_SOURCE
);
1235 msg
.payload
[nr_pdo
++] = cpu_to_le32(pdo
);
1240 /* No source capabilities defined, sink only */
1241 msg
.header
= PD_HEADER_LE(PD_CTRL_REJECT
,
1244 port
->negotiated_rev
,
1245 port
->message_id
, 0);
1247 msg
.header
= PD_HEADER_LE(PD_DATA_SOURCE_CAP
,
1250 port
->negotiated_rev
,
1255 return tcpm_pd_transmit(port
, TCPC_TX_SOP
, &msg
);
1258 static int tcpm_pd_send_sink_caps(struct tcpm_port
*port
)
1260 struct pd_message msg
;
1262 unsigned int i
, nr_pdo
= 0;
1264 memset(&msg
, 0, sizeof(msg
));
1266 for (i
= 0; i
< port
->nr_snk_pdo
; i
++) {
1267 if (port
->negotiated_rev
>= PD_REV30
) {
1268 msg
.payload
[nr_pdo
++] = cpu_to_le32(port
->snk_pdo
[i
]);
1270 pdo
= tcpm_forge_legacy_pdo(port
, port
->snk_pdo
[i
], TYPEC_SINK
);
1272 msg
.payload
[nr_pdo
++] = cpu_to_le32(pdo
);
1277 /* No sink capabilities defined, source only */
1278 msg
.header
= PD_HEADER_LE(PD_CTRL_REJECT
,
1281 port
->negotiated_rev
,
1282 port
->message_id
, 0);
1284 msg
.header
= PD_HEADER_LE(PD_DATA_SINK_CAP
,
1287 port
->negotiated_rev
,
1292 return tcpm_pd_transmit(port
, TCPC_TX_SOP
, &msg
);
1295 static void mod_tcpm_delayed_work(struct tcpm_port
*port
, unsigned int delay_ms
)
1298 hrtimer_start(&port
->state_machine_timer
, ms_to_ktime(delay_ms
), HRTIMER_MODE_REL
);
1300 hrtimer_cancel(&port
->state_machine_timer
);
1301 kthread_queue_work(port
->wq
, &port
->state_machine
);
1305 static void mod_vdm_delayed_work(struct tcpm_port
*port
, unsigned int delay_ms
)
1308 hrtimer_start(&port
->vdm_state_machine_timer
, ms_to_ktime(delay_ms
),
1311 hrtimer_cancel(&port
->vdm_state_machine_timer
);
1312 kthread_queue_work(port
->wq
, &port
->vdm_state_machine
);
1316 static void mod_enable_frs_delayed_work(struct tcpm_port
*port
, unsigned int delay_ms
)
1319 hrtimer_start(&port
->enable_frs_timer
, ms_to_ktime(delay_ms
), HRTIMER_MODE_REL
);
1321 hrtimer_cancel(&port
->enable_frs_timer
);
1322 kthread_queue_work(port
->wq
, &port
->enable_frs
);
1326 static void mod_send_discover_delayed_work(struct tcpm_port
*port
, unsigned int delay_ms
)
1329 hrtimer_start(&port
->send_discover_timer
, ms_to_ktime(delay_ms
), HRTIMER_MODE_REL
);
1331 hrtimer_cancel(&port
->send_discover_timer
);
1332 kthread_queue_work(port
->wq
, &port
->send_discover_work
);
1336 static void tcpm_set_state(struct tcpm_port
*port
, enum tcpm_state state
,
1337 unsigned int delay_ms
)
1340 tcpm_log(port
, "pending state change %s -> %s @ %u ms [%s %s]",
1341 tcpm_states
[port
->state
], tcpm_states
[state
], delay_ms
,
1342 pd_rev
[port
->negotiated_rev
], tcpm_ams_str
[port
->ams
]);
1343 port
->delayed_state
= state
;
1344 mod_tcpm_delayed_work(port
, delay_ms
);
1345 port
->delayed_runtime
= ktime_add(ktime_get(), ms_to_ktime(delay_ms
));
1346 port
->delay_ms
= delay_ms
;
1348 tcpm_log(port
, "state change %s -> %s [%s %s]",
1349 tcpm_states
[port
->state
], tcpm_states
[state
],
1350 pd_rev
[port
->negotiated_rev
], tcpm_ams_str
[port
->ams
]);
1351 port
->delayed_state
= INVALID_STATE
;
1352 port
->prev_state
= port
->state
;
1353 port
->state
= state
;
1355 * Don't re-queue the state machine work item if we're currently
1356 * in the state machine and we're immediately changing states.
1357 * tcpm_state_machine_work() will continue running the state
1360 if (!port
->state_machine_running
)
1361 mod_tcpm_delayed_work(port
, 0);
1365 static void tcpm_set_state_cond(struct tcpm_port
*port
, enum tcpm_state state
,
1366 unsigned int delay_ms
)
1368 if (port
->enter_state
== port
->state
)
1369 tcpm_set_state(port
, state
, delay_ms
);
1372 "skipped %sstate change %s -> %s [%u ms], context state %s [%s %s]",
1373 delay_ms
? "delayed " : "",
1374 tcpm_states
[port
->state
], tcpm_states
[state
],
1375 delay_ms
, tcpm_states
[port
->enter_state
],
1376 pd_rev
[port
->negotiated_rev
], tcpm_ams_str
[port
->ams
]);
1379 static void tcpm_queue_message(struct tcpm_port
*port
,
1380 enum pd_msg_request message
)
1382 port
->queued_message
= message
;
1383 mod_tcpm_delayed_work(port
, 0);
1386 static bool tcpm_vdm_ams(struct tcpm_port
*port
)
1388 switch (port
->ams
) {
1389 case DISCOVER_IDENTITY
:
1390 case SOURCE_STARTUP_CABLE_PLUG_DISCOVER_IDENTITY
:
1391 case DISCOVER_SVIDS
:
1392 case DISCOVER_MODES
:
1393 case DFP_TO_UFP_ENTER_MODE
:
1394 case DFP_TO_UFP_EXIT_MODE
:
1395 case DFP_TO_CABLE_PLUG_ENTER_MODE
:
1396 case DFP_TO_CABLE_PLUG_EXIT_MODE
:
1398 case UNSTRUCTURED_VDMS
:
1399 case STRUCTURED_VDMS
:
1408 static bool tcpm_ams_interruptible(struct tcpm_port
*port
)
1410 switch (port
->ams
) {
1411 /* Interruptible AMS */
1414 case FIRMWARE_UPDATE
:
1415 case DISCOVER_IDENTITY
:
1416 case SOURCE_STARTUP_CABLE_PLUG_DISCOVER_IDENTITY
:
1417 case DISCOVER_SVIDS
:
1418 case DISCOVER_MODES
:
1419 case DFP_TO_UFP_ENTER_MODE
:
1420 case DFP_TO_UFP_EXIT_MODE
:
1421 case DFP_TO_CABLE_PLUG_ENTER_MODE
:
1422 case DFP_TO_CABLE_PLUG_EXIT_MODE
:
1423 case UNSTRUCTURED_VDMS
:
1424 case STRUCTURED_VDMS
:
1428 /* Non-Interruptible AMS */
1438 static int tcpm_ams_start(struct tcpm_port
*port
, enum tcpm_ams ams
)
1442 tcpm_log(port
, "AMS %s start", tcpm_ams_str
[ams
]);
1444 if (!tcpm_ams_interruptible(port
) &&
1445 !(ams
== HARD_RESET
|| ams
== SOFT_RESET_AMS
)) {
1446 port
->upcoming_state
= INVALID_STATE
;
1447 tcpm_log(port
, "AMS %s not interruptible, aborting",
1448 tcpm_ams_str
[port
->ams
]);
1452 if (port
->pwr_role
== TYPEC_SOURCE
) {
1453 enum typec_cc_status cc_req
= port
->cc_req
;
1457 if (ams
== HARD_RESET
) {
1458 tcpm_set_cc(port
, tcpm_rp_cc(port
));
1459 tcpm_pd_transmit(port
, TCPC_TX_HARD_RESET
, NULL
);
1460 tcpm_set_state(port
, HARD_RESET_START
, 0);
1462 } else if (ams
== SOFT_RESET_AMS
) {
1463 if (!port
->explicit_contract
)
1464 tcpm_set_cc(port
, tcpm_rp_cc(port
));
1465 tcpm_set_state(port
, SOFT_RESET_SEND
, 0);
1467 } else if (tcpm_vdm_ams(port
)) {
1468 /* tSinkTx is enforced in vdm_run_state_machine */
1469 if (port
->negotiated_rev
>= PD_REV30
)
1470 tcpm_set_cc(port
, SINK_TX_NG
);
1474 if (port
->negotiated_rev
>= PD_REV30
)
1475 tcpm_set_cc(port
, SINK_TX_NG
);
1477 switch (port
->state
) {
1480 case SRC_SOFT_RESET_WAIT_SNK_TX
:
1482 case SOFT_RESET_SEND
:
1483 if (port
->negotiated_rev
>= PD_REV30
)
1484 tcpm_set_state(port
, AMS_START
,
1485 cc_req
== SINK_TX_OK
?
1488 tcpm_set_state(port
, AMS_START
, 0);
1491 if (port
->negotiated_rev
>= PD_REV30
)
1492 tcpm_set_state(port
, SRC_READY
,
1493 cc_req
== SINK_TX_OK
?
1496 tcpm_set_state(port
, SRC_READY
, 0);
1500 if (port
->negotiated_rev
>= PD_REV30
&&
1501 !tcpm_sink_tx_ok(port
) &&
1502 ams
!= SOFT_RESET_AMS
&&
1503 ams
!= HARD_RESET
) {
1504 port
->upcoming_state
= INVALID_STATE
;
1505 tcpm_log(port
, "Sink TX No Go");
1511 if (ams
== HARD_RESET
) {
1512 tcpm_pd_transmit(port
, TCPC_TX_HARD_RESET
, NULL
);
1513 tcpm_set_state(port
, HARD_RESET_START
, 0);
1515 } else if (tcpm_vdm_ams(port
)) {
1519 if (port
->state
== SNK_READY
||
1520 port
->state
== SNK_SOFT_RESET
)
1521 tcpm_set_state(port
, AMS_START
, 0);
1523 tcpm_set_state(port
, SNK_READY
, 0);
1530 * VDM/VDO handling functions
1532 static void tcpm_queue_vdm(struct tcpm_port
*port
, const u32 header
,
1533 const u32
*data
, int cnt
, enum tcpm_transmit_type tx_sop_type
)
1535 u32 vdo_hdr
= port
->vdo_data
[0];
1537 WARN_ON(!mutex_is_locked(&port
->lock
));
1539 /* If is sending discover_identity, handle received message first */
1540 if (PD_VDO_SVDM(vdo_hdr
) && PD_VDO_CMD(vdo_hdr
) == CMD_DISCOVER_IDENT
) {
1541 if (tx_sop_type
== TCPC_TX_SOP_PRIME
)
1542 port
->send_discover_prime
= true;
1544 port
->send_discover
= true;
1545 mod_send_discover_delayed_work(port
, SEND_DISCOVER_RETRY_MS
);
1547 /* Make sure we are not still processing a previous VDM packet */
1548 WARN_ON(port
->vdm_state
> VDM_STATE_DONE
);
1551 port
->vdo_count
= cnt
+ 1;
1552 port
->vdo_data
[0] = header
;
1553 memcpy(&port
->vdo_data
[1], data
, sizeof(u32
) * cnt
);
1554 /* Set ready, vdm state machine will actually send */
1555 port
->vdm_retries
= 0;
1556 port
->vdm_state
= VDM_STATE_READY
;
1557 port
->vdm_sm_running
= true;
1559 port
->tx_sop_type
= tx_sop_type
;
1561 mod_vdm_delayed_work(port
, 0);
1564 static void tcpm_queue_vdm_unlocked(struct tcpm_port
*port
, const u32 header
,
1565 const u32
*data
, int cnt
, enum tcpm_transmit_type tx_sop_type
)
1567 mutex_lock(&port
->lock
);
1568 tcpm_queue_vdm(port
, header
, data
, cnt
, TCPC_TX_SOP
);
1569 mutex_unlock(&port
->lock
);
1572 static void svdm_consume_identity(struct tcpm_port
*port
, const u32
*p
, int cnt
)
1574 u32 vdo
= p
[VDO_INDEX_IDH
];
1575 u32 product
= p
[VDO_INDEX_PRODUCT
];
1577 memset(&port
->mode_data
, 0, sizeof(port
->mode_data
));
1579 port
->partner_ident
.id_header
= vdo
;
1580 port
->partner_ident
.cert_stat
= p
[VDO_INDEX_CSTAT
];
1581 port
->partner_ident
.product
= product
;
1583 typec_partner_set_identity(port
->partner
);
1585 tcpm_log(port
, "Identity: %04x:%04x.%04x",
1587 PD_PRODUCT_PID(product
), product
& 0xffff);
1590 static void svdm_consume_identity_sop_prime(struct tcpm_port
*port
, const u32
*p
, int cnt
)
1592 u32 idh
= p
[VDO_INDEX_IDH
];
1593 u32 product
= p
[VDO_INDEX_PRODUCT
];
1597 * Attempt to consume identity only if cable currently is not set
1599 if (!IS_ERR_OR_NULL(port
->cable
))
1602 /* Reset cable identity */
1603 memset(&port
->cable_ident
, 0, sizeof(port
->cable_ident
));
1605 /* Fill out id header, cert, product, cable VDO 1 */
1606 port
->cable_ident
.id_header
= idh
;
1607 port
->cable_ident
.cert_stat
= p
[VDO_INDEX_CSTAT
];
1608 port
->cable_ident
.product
= product
;
1609 port
->cable_ident
.vdo
[0] = p
[VDO_INDEX_CABLE_1
];
1611 /* Fill out cable desc, infer svdm_version from pd revision */
1612 port
->cable_desc
.type
= (enum typec_plug_type
) (VDO_TYPEC_CABLE_TYPE(p
[VDO_INDEX_CABLE_1
]) +
1614 port
->cable_desc
.active
= PD_IDH_PTYPE(idh
) == IDH_PTYPE_ACABLE
? 1 : 0;
1615 /* Log PD Revision and additional cable VDO from negotiated revision */
1616 switch (port
->negotiated_rev_prime
) {
1618 port
->cable_desc
.pd_revision
= 0x0300;
1619 if (port
->cable_desc
.active
)
1620 port
->cable_ident
.vdo
[1] = p
[VDO_INDEX_CABLE_2
];
1623 port
->cable_desc
.pd_revision
= 0x0200;
1626 port
->cable_desc
.pd_revision
= 0x0200;
1629 port
->cable_desc
.identity
= &port
->cable_ident
;
1630 /* Register Cable, set identity and svdm_version */
1631 port
->cable
= typec_register_cable(port
->typec_port
, &port
->cable_desc
);
1632 if (IS_ERR_OR_NULL(port
->cable
))
1634 typec_cable_set_identity(port
->cable
);
1635 /* Get SVDM version */
1636 svdm_version
= PD_VDO_SVDM_VER(p
[VDO_INDEX_HDR
]);
1637 typec_cable_set_svdm_version(port
->cable
, svdm_version
);
1640 if (IS_ERR_OR_NULL(port
->plug_prime
)) {
1641 port
->plug_prime_desc
.index
= TYPEC_PLUG_SOP_P
;
1642 port
->plug_prime
= typec_register_plug(port
->cable
,
1643 &port
->plug_prime_desc
);
1647 static bool svdm_consume_svids(struct tcpm_port
*port
, const u32
*p
, int cnt
,
1648 enum tcpm_transmit_type rx_sop_type
)
1650 struct pd_mode_data
*pmdata
= rx_sop_type
== TCPC_TX_SOP_PRIME
?
1651 &port
->mode_data_prime
: &port
->mode_data
;
1654 for (i
= 1; i
< cnt
; i
++) {
1657 svid
= (p
[i
] >> 16) & 0xffff;
1661 if (pmdata
->nsvids
>= SVID_DISCOVERY_MAX
)
1664 pmdata
->svids
[pmdata
->nsvids
++] = svid
;
1665 tcpm_log(port
, "SVID %d: 0x%x", pmdata
->nsvids
, svid
);
1667 svid
= p
[i
] & 0xffff;
1671 if (pmdata
->nsvids
>= SVID_DISCOVERY_MAX
)
1674 pmdata
->svids
[pmdata
->nsvids
++] = svid
;
1675 tcpm_log(port
, "SVID %d: 0x%x", pmdata
->nsvids
, svid
);
1679 * PD3.0 Spec 6.4.4.3.2: The SVIDs are returned 2 per VDO (see Table
1680 * 6-43), and can be returned maximum 6 VDOs per response (see Figure
1681 * 6-19). If the Respondersupports 12 or more SVID then the Discover
1682 * SVIDs Command Shall be executed multiple times until a Discover
1683 * SVIDs VDO is returned ending either with a SVID value of 0x0000 in
1684 * the last part of the last VDO or with a VDO containing two SVIDs
1685 * with values of 0x0000.
1687 * However, some odd dockers support SVIDs less than 12 but without
1688 * 0x0000 in the last VDO, so we need to break the Discover SVIDs
1689 * request and return false here.
1693 tcpm_log(port
, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX
);
1697 static void svdm_consume_modes(struct tcpm_port
*port
, const u32
*p
, int cnt
,
1698 enum tcpm_transmit_type rx_sop_type
)
1700 struct pd_mode_data
*pmdata
= &port
->mode_data
;
1701 struct typec_altmode_desc
*paltmode
;
1704 switch (rx_sop_type
) {
1705 case TCPC_TX_SOP_PRIME
:
1706 pmdata
= &port
->mode_data_prime
;
1707 if (pmdata
->altmodes
>= ARRAY_SIZE(port
->plug_prime_altmode
)) {
1708 /* Already logged in svdm_consume_svids() */
1713 pmdata
= &port
->mode_data
;
1714 if (pmdata
->altmodes
>= ARRAY_SIZE(port
->partner_altmode
)) {
1715 /* Already logged in svdm_consume_svids() */
1723 for (i
= 1; i
< cnt
; i
++) {
1724 paltmode
= &pmdata
->altmode_desc
[pmdata
->altmodes
];
1725 memset(paltmode
, 0, sizeof(*paltmode
));
1727 paltmode
->svid
= pmdata
->svids
[pmdata
->svid_index
];
1729 paltmode
->vdo
= p
[i
];
1731 tcpm_log(port
, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x",
1732 pmdata
->altmodes
, paltmode
->svid
,
1733 paltmode
->mode
, paltmode
->vdo
);
1739 static void tcpm_register_partner_altmodes(struct tcpm_port
*port
)
1741 struct pd_mode_data
*modep
= &port
->mode_data
;
1742 struct typec_altmode
*altmode
;
1745 for (i
= 0; i
< modep
->altmodes
; i
++) {
1746 altmode
= typec_partner_register_altmode(port
->partner
,
1747 &modep
->altmode_desc
[i
]);
1748 if (IS_ERR(altmode
)) {
1749 tcpm_log(port
, "Failed to register partner SVID 0x%04x",
1750 modep
->altmode_desc
[i
].svid
);
1753 port
->partner_altmode
[i
] = altmode
;
1757 static void tcpm_register_plug_altmodes(struct tcpm_port
*port
)
1759 struct pd_mode_data
*modep
= &port
->mode_data_prime
;
1760 struct typec_altmode
*altmode
;
1763 typec_plug_set_num_altmodes(port
->plug_prime
, modep
->altmodes
);
1765 for (i
= 0; i
< modep
->altmodes
; i
++) {
1766 altmode
= typec_plug_register_altmode(port
->plug_prime
,
1767 &modep
->altmode_desc
[i
]);
1768 if (IS_ERR(altmode
)) {
1769 tcpm_log(port
, "Failed to register plug SVID 0x%04x",
1770 modep
->altmode_desc
[i
].svid
);
1773 port
->plug_prime_altmode
[i
] = altmode
;
1777 #define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header)
1778 #define supports_modal_cable(port) PD_IDH_MODAL_SUPP((port)->cable_ident.id_header)
1779 #define supports_host(port) PD_IDH_HOST_SUPP((port->partner_ident.id_header))
1782 * Helper to determine whether the port is capable of SOP' communication at the
1783 * current point in time.
1785 static bool tcpm_can_communicate_sop_prime(struct tcpm_port
*port
)
1787 /* Check to see if tcpc supports SOP' communication */
1788 if (!port
->tcpc
->cable_comm_capable
|| !port
->tcpc
->cable_comm_capable(port
->tcpc
))
1791 * Power Delivery 2.0 Section 6.3.11
1792 * Before communicating with a Cable Plug a Port Should ensure that it
1793 * is the Vconn Source and that the Cable Plugs are powered by
1794 * performing a Vconn swap if necessary. Since it cannot be guaranteed
1795 * that the present Vconn Source is supplying Vconn, the only means to
1796 * ensure that the Cable Plugs are powered is for a Port wishing to
1797 * communicate with a Cable Plug is to become the Vconn Source.
1799 * Power Delivery 3.0 Section 6.3.11
1800 * Before communicating with a Cable Plug a Port Shall ensure that it
1801 * is the Vconn source.
1803 if (port
->vconn_role
!= TYPEC_SOURCE
)
1806 * Power Delivery 2.0 Section 2.4.4
1807 * When no Contract or an Implicit Contract is in place the Source can
1808 * communicate with a Cable Plug using SOP' packets in order to discover
1809 * its characteristics.
1811 * Power Delivery 3.0 Section 2.4.4
1812 * When no Contract or an Implicit Contract is in place only the Source
1813 * port that is supplying Vconn is allowed to send packets to a Cable
1814 * Plug and is allowed to respond to packets from the Cable Plug.
1816 if (!port
->explicit_contract
)
1817 return port
->pwr_role
== TYPEC_SOURCE
;
1818 if (port
->negotiated_rev
== PD_REV30
)
1821 * Power Delivery 2.0 Section 2.4.4
1823 * When an Explicit Contract is in place the DFP (either the Source or
1824 * the Sink) can communicate with the Cable Plug(s) using SOP’/SOP”
1825 * Packets (see Figure 2-3).
1827 if (port
->negotiated_rev
== PD_REV20
)
1828 return port
->data_role
== TYPEC_HOST
;
1832 static bool tcpm_attempt_vconn_swap_discovery(struct tcpm_port
*port
)
1834 if (!port
->tcpc
->attempt_vconn_swap_discovery
)
1837 /* Port is already source, no need to perform swap */
1838 if (port
->vconn_role
== TYPEC_SOURCE
)
1842 * Partner needs to support Alternate Modes with modal support. If
1843 * partner is also capable of being a USB Host, it could be a device
1844 * that supports Alternate Modes as the DFP.
1846 if (!supports_modal(port
) || supports_host(port
))
1849 if ((port
->negotiated_rev
== PD_REV20
&& port
->data_role
== TYPEC_HOST
) ||
1850 port
->negotiated_rev
== PD_REV30
)
1851 return port
->tcpc
->attempt_vconn_swap_discovery(port
->tcpc
);
1857 static bool tcpm_cable_vdm_supported(struct tcpm_port
*port
)
1859 return !IS_ERR_OR_NULL(port
->cable
) &&
1860 typec_cable_is_active(port
->cable
) &&
1861 supports_modal_cable(port
) &&
1862 tcpm_can_communicate_sop_prime(port
);
1865 static int tcpm_pd_svdm(struct tcpm_port
*port
, struct typec_altmode
*adev
,
1866 const u32
*p
, int cnt
, u32
*response
,
1867 enum adev_actions
*adev_action
,
1868 enum tcpm_transmit_type rx_sop_type
,
1869 enum tcpm_transmit_type
*response_tx_sop_type
)
1871 struct typec_port
*typec
= port
->typec_port
;
1872 struct typec_altmode
*pdev
, *pdev_prime
;
1873 struct pd_mode_data
*modep
, *modep_prime
;
1881 cmd_type
= PD_VDO_CMDT(p
[0]);
1882 cmd
= PD_VDO_CMD(p
[0]);
1884 tcpm_log(port
, "Rx VDM cmd 0x%x type %d cmd %d len %d",
1885 p
[0], cmd_type
, cmd
, cnt
);
1887 switch (rx_sop_type
) {
1888 case TCPC_TX_SOP_PRIME
:
1889 modep_prime
= &port
->mode_data_prime
;
1890 pdev_prime
= typec_match_altmode(port
->plug_prime_altmode
,
1891 ALTMODE_DISCOVERY_MAX
,
1894 svdm_version
= typec_get_cable_svdm_version(typec
);
1896 * Update SVDM version if cable was discovered before port partner.
1898 if (!IS_ERR_OR_NULL(port
->cable
) &&
1899 PD_VDO_SVDM_VER(p
[0]) < svdm_version
)
1900 typec_cable_set_svdm_version(port
->cable
, svdm_version
);
1903 modep
= &port
->mode_data
;
1904 pdev
= typec_match_altmode(port
->partner_altmode
,
1905 ALTMODE_DISCOVERY_MAX
,
1908 svdm_version
= typec_get_negotiated_svdm_version(typec
);
1909 if (svdm_version
< 0)
1913 modep
= &port
->mode_data
;
1914 pdev
= typec_match_altmode(port
->partner_altmode
,
1915 ALTMODE_DISCOVERY_MAX
,
1918 svdm_version
= typec_get_negotiated_svdm_version(typec
);
1919 if (svdm_version
< 0)
1927 * Only the port or port partner is allowed to initialize SVDM
1928 * commands over SOP'. In case the port partner initializes a
1929 * sequence when it is not allowed to send SOP' messages, drop
1930 * the message should the TCPM port try to process it.
1932 if (rx_sop_type
== TCPC_TX_SOP_PRIME
)
1936 case CMD_DISCOVER_IDENT
:
1937 if (PD_VDO_VID(p
[0]) != USB_SID_PD
)
1940 if (IS_ERR_OR_NULL(port
->partner
))
1943 if (PD_VDO_SVDM_VER(p
[0]) < svdm_version
) {
1944 typec_partner_set_svdm_version(port
->partner
,
1945 PD_VDO_SVDM_VER(p
[0]));
1946 svdm_version
= PD_VDO_SVDM_VER(p
[0]);
1949 port
->ams
= DISCOVER_IDENTITY
;
1951 * PD2.0 Spec 6.10.3: respond with NAK as DFP (data host)
1952 * PD3.1 Spec 6.4.4.2.5.1: respond with NAK if "invalid field" or
1953 * "wrong configuation" or "Unrecognized"
1955 if ((port
->data_role
== TYPEC_DEVICE
|| svdm_version
>= SVDM_VER_2_0
) &&
1957 if (svdm_version
< SVDM_VER_2_0
) {
1958 for (i
= 0; i
< port
->nr_snk_vdo_v1
; i
++)
1959 response
[i
+ 1] = port
->snk_vdo_v1
[i
];
1960 rlen
= port
->nr_snk_vdo_v1
+ 1;
1963 for (i
= 0; i
< port
->nr_snk_vdo
; i
++)
1964 response
[i
+ 1] = port
->snk_vdo
[i
];
1965 rlen
= port
->nr_snk_vdo
+ 1;
1969 case CMD_DISCOVER_SVID
:
1970 port
->ams
= DISCOVER_SVIDS
;
1972 case CMD_DISCOVER_MODES
:
1973 port
->ams
= DISCOVER_MODES
;
1975 case CMD_ENTER_MODE
:
1976 port
->ams
= DFP_TO_UFP_ENTER_MODE
;
1979 port
->ams
= DFP_TO_UFP_EXIT_MODE
;
1982 /* Attention command does not have response */
1983 *adev_action
= ADEV_ATTENTION
;
1989 response
[0] = p
[0] | VDO_CMDT(CMDT_RSP_ACK
);
1990 } else if (rlen
== 0) {
1991 response
[0] = p
[0] | VDO_CMDT(CMDT_RSP_NAK
);
1994 response
[0] = p
[0] | VDO_CMDT(CMDT_RSP_BUSY
);
1997 response
[0] = (response
[0] & ~VDO_SVDM_VERS_MASK
) |
1998 (VDO_SVDM_VERS(typec_get_negotiated_svdm_version(typec
)));
2002 * Silently drop message if we are not connected, but can process
2003 * if SOP' Discover Identity prior to explicit contract.
2005 if (IS_ERR_OR_NULL(port
->partner
) &&
2006 !(rx_sop_type
== TCPC_TX_SOP_PRIME
&& cmd
== CMD_DISCOVER_IDENT
))
2009 tcpm_ams_finish(port
);
2013 * SVDM Command Flow for SOP and SOP':
2014 * SOP Discover Identity
2015 * SOP' Discover Identity
2016 * SOP Discover SVIDs
2019 * SOP' Discover SVIDs
2022 * Perform Discover SOP' if the port can communicate with cable
2025 case CMD_DISCOVER_IDENT
:
2026 switch (rx_sop_type
) {
2028 if (PD_VDO_SVDM_VER(p
[0]) < svdm_version
) {
2029 typec_partner_set_svdm_version(port
->partner
,
2030 PD_VDO_SVDM_VER(p
[0]));
2031 /* If cable is discovered before partner, downgrade svdm */
2032 if (!IS_ERR_OR_NULL(port
->cable
) &&
2033 (typec_get_cable_svdm_version(port
->typec_port
) >
2035 typec_cable_set_svdm_version(port
->cable
,
2039 svdm_consume_identity(port
, p
, cnt
);
2040 /* Attempt Vconn swap, delay SOP' discovery if necessary */
2041 if (tcpm_attempt_vconn_swap_discovery(port
)) {
2042 port
->send_discover_prime
= true;
2043 port
->upcoming_state
= VCONN_SWAP_SEND
;
2044 ret
= tcpm_ams_start(port
, VCONN_SWAP
);
2047 /* Cannot perform Vconn swap */
2048 port
->upcoming_state
= INVALID_STATE
;
2049 port
->send_discover_prime
= false;
2053 * Attempt Discover Identity on SOP' if the
2054 * cable was not discovered previously, and use
2055 * the SVDM version of the partner to probe.
2057 if (IS_ERR_OR_NULL(port
->cable
) &&
2058 tcpm_can_communicate_sop_prime(port
)) {
2059 *response_tx_sop_type
= TCPC_TX_SOP_PRIME
;
2060 port
->send_discover_prime
= true;
2061 response
[0] = VDO(USB_SID_PD
, 1,
2062 typec_get_negotiated_svdm_version(typec
),
2063 CMD_DISCOVER_IDENT
);
2066 *response_tx_sop_type
= TCPC_TX_SOP
;
2067 response
[0] = VDO(USB_SID_PD
, 1,
2068 typec_get_negotiated_svdm_version(typec
),
2073 case TCPC_TX_SOP_PRIME
:
2075 * svdm_consume_identity_sop_prime will determine
2076 * the svdm_version for the cable moving forward.
2078 svdm_consume_identity_sop_prime(port
, p
, cnt
);
2081 * If received in SRC_VDM_IDENTITY_REQUEST, continue
2082 * to SRC_SEND_CAPABILITIES
2084 if (port
->state
== SRC_VDM_IDENTITY_REQUEST
) {
2085 tcpm_set_state(port
, SRC_SEND_CAPABILITIES
, 0);
2089 *response_tx_sop_type
= TCPC_TX_SOP
;
2090 response
[0] = VDO(USB_SID_PD
, 1,
2091 typec_get_negotiated_svdm_version(typec
),
2099 case CMD_DISCOVER_SVID
:
2100 *response_tx_sop_type
= rx_sop_type
;
2102 if (svdm_consume_svids(port
, p
, cnt
, rx_sop_type
)) {
2103 response
[0] = VDO(USB_SID_PD
, 1, svdm_version
, CMD_DISCOVER_SVID
);
2106 if (rx_sop_type
== TCPC_TX_SOP
) {
2107 if (modep
->nsvids
&& supports_modal(port
)) {
2108 response
[0] = VDO(modep
->svids
[0], 1, svdm_version
,
2109 CMD_DISCOVER_MODES
);
2112 } else if (rx_sop_type
== TCPC_TX_SOP_PRIME
) {
2113 if (modep_prime
->nsvids
) {
2114 response
[0] = VDO(modep_prime
->svids
[0], 1,
2115 svdm_version
, CMD_DISCOVER_MODES
);
2121 case CMD_DISCOVER_MODES
:
2122 if (rx_sop_type
== TCPC_TX_SOP
) {
2124 svdm_consume_modes(port
, p
, cnt
, rx_sop_type
);
2125 modep
->svid_index
++;
2126 if (modep
->svid_index
< modep
->nsvids
) {
2127 u16 svid
= modep
->svids
[modep
->svid_index
];
2128 *response_tx_sop_type
= TCPC_TX_SOP
;
2129 response
[0] = VDO(svid
, 1, svdm_version
,
2130 CMD_DISCOVER_MODES
);
2132 } else if (tcpm_cable_vdm_supported(port
)) {
2133 *response_tx_sop_type
= TCPC_TX_SOP_PRIME
;
2134 response
[0] = VDO(USB_SID_PD
, 1,
2135 typec_get_cable_svdm_version(typec
),
2139 tcpm_register_partner_altmodes(port
);
2141 } else if (rx_sop_type
== TCPC_TX_SOP_PRIME
) {
2143 svdm_consume_modes(port
, p
, cnt
, rx_sop_type
);
2144 modep_prime
->svid_index
++;
2145 if (modep_prime
->svid_index
< modep_prime
->nsvids
) {
2146 u16 svid
= modep_prime
->svids
[modep_prime
->svid_index
];
2147 *response_tx_sop_type
= TCPC_TX_SOP_PRIME
;
2148 response
[0] = VDO(svid
, 1,
2149 typec_get_cable_svdm_version(typec
),
2150 CMD_DISCOVER_MODES
);
2153 tcpm_register_plug_altmodes(port
);
2154 tcpm_register_partner_altmodes(port
);
2158 case CMD_ENTER_MODE
:
2159 *response_tx_sop_type
= rx_sop_type
;
2160 if (rx_sop_type
== TCPC_TX_SOP
) {
2162 typec_altmode_update_active(pdev
, true);
2163 *adev_action
= ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL
;
2165 } else if (rx_sop_type
== TCPC_TX_SOP_PRIME
) {
2166 if (adev
&& pdev_prime
) {
2167 typec_altmode_update_active(pdev_prime
, true);
2168 *adev_action
= ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL
;
2173 *response_tx_sop_type
= rx_sop_type
;
2174 if (rx_sop_type
== TCPC_TX_SOP
) {
2176 typec_altmode_update_active(pdev
, false);
2177 /* Back to USB Operation */
2178 *adev_action
= ADEV_NOTIFY_USB_AND_QUEUE_VDM
;
2183 case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15):
2186 /* Unrecognized SVDM */
2187 response
[0] = p
[0] | VDO_CMDT(CMDT_RSP_NAK
);
2189 response
[0] = (response
[0] & ~VDO_SVDM_VERS_MASK
) |
2190 (VDO_SVDM_VERS(svdm_version
));
2195 tcpm_ams_finish(port
);
2197 case CMD_DISCOVER_IDENT
:
2198 case CMD_DISCOVER_SVID
:
2199 case CMD_DISCOVER_MODES
:
2200 case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15):
2202 case CMD_ENTER_MODE
:
2203 /* Back to USB Operation */
2204 *adev_action
= ADEV_NOTIFY_USB_AND_QUEUE_VDM
;
2207 /* Unrecognized SVDM */
2208 response
[0] = p
[0] | VDO_CMDT(CMDT_RSP_NAK
);
2210 response
[0] = (response
[0] & ~VDO_SVDM_VERS_MASK
) |
2211 (VDO_SVDM_VERS(svdm_version
));
2216 response
[0] = p
[0] | VDO_CMDT(CMDT_RSP_NAK
);
2218 response
[0] = (response
[0] & ~VDO_SVDM_VERS_MASK
) |
2219 (VDO_SVDM_VERS(svdm_version
));
2223 /* Informing the alternate mode drivers about everything */
2224 *adev_action
= ADEV_QUEUE_VDM
;
2228 static void tcpm_pd_handle_msg(struct tcpm_port
*port
,
2229 enum pd_msg_request message
,
2232 static void tcpm_handle_vdm_request(struct tcpm_port
*port
,
2233 const __le32
*payload
, int cnt
,
2234 enum tcpm_transmit_type rx_sop_type
)
2236 enum adev_actions adev_action
= ADEV_NONE
;
2237 struct typec_altmode
*adev
;
2238 u32 p
[PD_MAX_PAYLOAD
];
2239 u32 response
[8] = { };
2241 enum tcpm_transmit_type response_tx_sop_type
= TCPC_TX_SOP
;
2243 for (i
= 0; i
< cnt
; i
++)
2244 p
[i
] = le32_to_cpu(payload
[i
]);
2246 adev
= typec_match_altmode(port
->port_altmode
, ALTMODE_DISCOVERY_MAX
,
2247 PD_VDO_VID(p
[0]), PD_VDO_OPOS(p
[0]));
2249 if (port
->vdm_state
== VDM_STATE_BUSY
) {
2250 /* If UFP responded busy retry after timeout */
2251 if (PD_VDO_CMDT(p
[0]) == CMDT_RSP_BUSY
) {
2252 port
->vdm_state
= VDM_STATE_WAIT_RSP_BUSY
;
2253 port
->vdo_retry
= (p
[0] & ~VDO_CMDT_MASK
) |
2255 mod_vdm_delayed_work(port
, PD_T_VDM_BUSY
);
2258 port
->vdm_state
= VDM_STATE_DONE
;
2261 if (PD_VDO_SVDM(p
[0]) && (adev
|| tcpm_vdm_ams(port
) || port
->nr_snk_vdo
)) {
2263 * Here a SVDM is received (INIT or RSP or unknown). Set the vdm_sm_running in
2264 * advance because we are dropping the lock but may send VDMs soon.
2265 * For the cases of INIT received:
2266 * - If no response to send, it will be cleared later in this function.
2267 * - If there are responses to send, it will be cleared in the state machine.
2268 * For the cases of RSP received:
2269 * - If no further INIT to send, it will be cleared later in this function.
2270 * - Otherwise, it will be cleared in the state machine if timeout or it will go
2271 * back here until no further INIT to send.
2272 * For the cases of unknown type received:
2273 * - We will send NAK and the flag will be cleared in the state machine.
2275 port
->vdm_sm_running
= true;
2276 rlen
= tcpm_pd_svdm(port
, adev
, p
, cnt
, response
, &adev_action
,
2277 rx_sop_type
, &response_tx_sop_type
);
2279 if (port
->negotiated_rev
>= PD_REV30
)
2280 tcpm_pd_handle_msg(port
, PD_MSG_CTRL_NOT_SUPP
, NONE_AMS
);
2284 * We are done with any state stored in the port struct now, except
2285 * for any port struct changes done by the tcpm_queue_vdm() call
2286 * below, which is a separate operation.
2288 * So we can safely release the lock here; and we MUST release the
2289 * lock here to avoid an AB BA lock inversion:
2291 * If we keep the lock here then the lock ordering in this path is:
2292 * 1. tcpm_pd_rx_handler take the tcpm port lock
2293 * 2. One of the typec_altmode_* calls below takes the alt-mode's lock
2295 * And we also have this ordering:
2296 * 1. alt-mode driver takes the alt-mode's lock
2297 * 2. alt-mode driver calls tcpm_altmode_enter which takes the
2300 * Dropping our lock here avoids this.
2302 mutex_unlock(&port
->lock
);
2305 switch (adev_action
) {
2308 case ADEV_NOTIFY_USB_AND_QUEUE_VDM
:
2309 WARN_ON(typec_altmode_notify(adev
, TYPEC_STATE_USB
, NULL
));
2310 typec_altmode_vdm(adev
, p
[0], &p
[1], cnt
);
2312 case ADEV_QUEUE_VDM
:
2313 if (response_tx_sop_type
== TCPC_TX_SOP_PRIME
)
2314 typec_cable_altmode_vdm(adev
, TYPEC_PLUG_SOP_P
, p
[0], &p
[1], cnt
);
2316 typec_altmode_vdm(adev
, p
[0], &p
[1], cnt
);
2318 case ADEV_QUEUE_VDM_SEND_EXIT_MODE_ON_FAIL
:
2319 if (response_tx_sop_type
== TCPC_TX_SOP_PRIME
) {
2320 if (typec_cable_altmode_vdm(adev
, TYPEC_PLUG_SOP_P
,
2321 p
[0], &p
[1], cnt
)) {
2322 int svdm_version
= typec_get_cable_svdm_version(
2324 if (svdm_version
< 0)
2327 response
[0] = VDO(adev
->svid
, 1, svdm_version
,
2329 response
[0] |= VDO_OPOS(adev
->mode
);
2333 if (typec_altmode_vdm(adev
, p
[0], &p
[1], cnt
)) {
2334 int svdm_version
= typec_get_negotiated_svdm_version(
2336 if (svdm_version
< 0)
2339 response
[0] = VDO(adev
->svid
, 1, svdm_version
,
2341 response
[0] |= VDO_OPOS(adev
->mode
);
2346 case ADEV_ATTENTION
:
2347 if (typec_altmode_attention(adev
, p
[1]))
2348 tcpm_log(port
, "typec_altmode_attention no port partner altmode");
2354 * We must re-take the lock here to balance the unlock in
2355 * tcpm_pd_rx_handler, note that no changes, other then the
2356 * tcpm_queue_vdm call, are made while the lock is held again.
2357 * All that is done after the call is unwinding the call stack until
2358 * we return to tcpm_pd_rx_handler and do the unlock there.
2360 mutex_lock(&port
->lock
);
2363 tcpm_queue_vdm(port
, response
[0], &response
[1], rlen
- 1, response_tx_sop_type
);
2365 port
->vdm_sm_running
= false;
2368 static void tcpm_send_vdm(struct tcpm_port
*port
, u32 vid
, int cmd
,
2369 const u32
*data
, int count
, enum tcpm_transmit_type tx_sop_type
)
2374 switch (tx_sop_type
) {
2375 case TCPC_TX_SOP_PRIME
:
2377 * If the port partner is discovered, then the port partner's
2378 * SVDM Version will be returned
2380 svdm_version
= typec_get_cable_svdm_version(port
->typec_port
);
2381 if (svdm_version
< 0)
2382 svdm_version
= SVDM_VER_MAX
;
2385 svdm_version
= typec_get_negotiated_svdm_version(port
->typec_port
);
2386 if (svdm_version
< 0)
2390 svdm_version
= typec_get_negotiated_svdm_version(port
->typec_port
);
2391 if (svdm_version
< 0)
2396 if (WARN_ON(count
> VDO_MAX_SIZE
- 1))
2397 count
= VDO_MAX_SIZE
- 1;
2399 /* set VDM header with VID & CMD */
2400 header
= VDO(vid
, ((vid
& USB_SID_PD
) == USB_SID_PD
) ?
2401 1 : (PD_VDO_CMD(cmd
) <= CMD_ATTENTION
),
2403 tcpm_queue_vdm(port
, header
, data
, count
, tx_sop_type
);
2406 static unsigned int vdm_ready_timeout(u32 vdm_hdr
)
2408 unsigned int timeout
;
2409 int cmd
= PD_VDO_CMD(vdm_hdr
);
2411 /* its not a structured VDM command */
2412 if (!PD_VDO_SVDM(vdm_hdr
))
2413 return PD_T_VDM_UNSTRUCTURED
;
2415 switch (PD_VDO_CMDT(vdm_hdr
)) {
2417 if (cmd
== CMD_ENTER_MODE
|| cmd
== CMD_EXIT_MODE
)
2418 timeout
= PD_T_VDM_WAIT_MODE_E
;
2420 timeout
= PD_T_VDM_SNDR_RSP
;
2423 if (cmd
== CMD_ENTER_MODE
|| cmd
== CMD_EXIT_MODE
)
2424 timeout
= PD_T_VDM_E_MODE
;
2426 timeout
= PD_T_VDM_RCVR_RSP
;
2432 static void vdm_run_state_machine(struct tcpm_port
*port
)
2434 struct pd_message msg
;
2436 u32 vdo_hdr
= port
->vdo_data
[0];
2437 u32 response
[8] = { };
2439 switch (port
->vdm_state
) {
2440 case VDM_STATE_READY
:
2441 /* Only transmit VDM if attached */
2442 if (!port
->attached
) {
2443 port
->vdm_state
= VDM_STATE_ERR_BUSY
;
2448 * if there's traffic or we're not in PDO ready state don't send
2451 if (port
->state
!= SRC_READY
&& port
->state
!= SNK_READY
&&
2452 port
->state
!= SRC_VDM_IDENTITY_REQUEST
) {
2453 port
->vdm_sm_running
= false;
2457 /* TODO: AMS operation for Unstructured VDM */
2458 if (PD_VDO_SVDM(vdo_hdr
) && PD_VDO_CMDT(vdo_hdr
) == CMDT_INIT
) {
2459 switch (PD_VDO_CMD(vdo_hdr
)) {
2460 case CMD_DISCOVER_IDENT
:
2461 res
= tcpm_ams_start(port
, DISCOVER_IDENTITY
);
2463 switch (port
->tx_sop_type
) {
2464 case TCPC_TX_SOP_PRIME
:
2465 port
->send_discover_prime
= false;
2468 port
->send_discover
= false;
2471 port
->send_discover
= false;
2474 } else if (res
== -EAGAIN
) {
2475 port
->vdo_data
[0] = 0;
2476 mod_send_discover_delayed_work(port
,
2477 SEND_DISCOVER_RETRY_MS
);
2480 case CMD_DISCOVER_SVID
:
2481 res
= tcpm_ams_start(port
, DISCOVER_SVIDS
);
2483 case CMD_DISCOVER_MODES
:
2484 res
= tcpm_ams_start(port
, DISCOVER_MODES
);
2486 case CMD_ENTER_MODE
:
2487 res
= tcpm_ams_start(port
, DFP_TO_UFP_ENTER_MODE
);
2490 res
= tcpm_ams_start(port
, DFP_TO_UFP_EXIT_MODE
);
2493 res
= tcpm_ams_start(port
, ATTENTION
);
2495 case VDO_CMD_VENDOR(0) ... VDO_CMD_VENDOR(15):
2496 res
= tcpm_ams_start(port
, STRUCTURED_VDMS
);
2504 port
->vdm_state
= VDM_STATE_ERR_BUSY
;
2509 port
->vdm_state
= VDM_STATE_SEND_MESSAGE
;
2510 mod_vdm_delayed_work(port
, (port
->negotiated_rev
>= PD_REV30
&&
2511 port
->pwr_role
== TYPEC_SOURCE
&&
2512 PD_VDO_SVDM(vdo_hdr
) &&
2513 PD_VDO_CMDT(vdo_hdr
) == CMDT_INIT
) ?
2516 case VDM_STATE_WAIT_RSP_BUSY
:
2517 port
->vdo_data
[0] = port
->vdo_retry
;
2518 port
->vdo_count
= 1;
2519 port
->vdm_state
= VDM_STATE_READY
;
2520 tcpm_ams_finish(port
);
2522 case VDM_STATE_BUSY
:
2523 port
->vdm_state
= VDM_STATE_ERR_TMOUT
;
2524 if (port
->ams
!= NONE_AMS
)
2525 tcpm_ams_finish(port
);
2527 case VDM_STATE_ERR_SEND
:
2529 * When sending Discover Identity to SOP' before establishing an
2530 * explicit contract, do not retry. Instead, weave sending
2531 * Source_Capabilities over SOP and Discover Identity over SOP'.
2533 if (port
->state
== SRC_VDM_IDENTITY_REQUEST
) {
2534 tcpm_ams_finish(port
);
2535 port
->vdm_state
= VDM_STATE_DONE
;
2536 tcpm_set_state(port
, SRC_SEND_CAPABILITIES
, 0);
2538 * A partner which does not support USB PD will not reply,
2539 * so this is not a fatal error. At the same time, some
2540 * devices may not return GoodCRC under some circumstances,
2541 * so we need to retry.
2543 } else if (port
->vdm_retries
< 3) {
2544 tcpm_log(port
, "VDM Tx error, retry");
2545 port
->vdm_retries
++;
2546 port
->vdm_state
= VDM_STATE_READY
;
2547 if (PD_VDO_SVDM(vdo_hdr
) && PD_VDO_CMDT(vdo_hdr
) == CMDT_INIT
)
2548 tcpm_ams_finish(port
);
2550 tcpm_ams_finish(port
);
2551 if (port
->tx_sop_type
== TCPC_TX_SOP
)
2553 /* Handle SOP' Transmission Errors */
2554 switch (PD_VDO_CMD(vdo_hdr
)) {
2556 * If Discover Identity fails on SOP', then resume
2557 * discovery process on SOP only.
2559 case CMD_DISCOVER_IDENT
:
2560 port
->vdo_data
[0] = 0;
2561 response
[0] = VDO(USB_SID_PD
, 1,
2562 typec_get_negotiated_svdm_version(
2565 tcpm_queue_vdm(port
, response
[0], &response
[1],
2569 * If Discover SVIDs or Discover Modes fail, then
2570 * proceed with Alt Mode discovery process on SOP.
2572 case CMD_DISCOVER_SVID
:
2573 tcpm_register_partner_altmodes(port
);
2575 case CMD_DISCOVER_MODES
:
2576 tcpm_register_partner_altmodes(port
);
2583 case VDM_STATE_SEND_MESSAGE
:
2584 /* Prepare and send VDM */
2585 memset(&msg
, 0, sizeof(msg
));
2586 if (port
->tx_sop_type
== TCPC_TX_SOP_PRIME
) {
2587 msg
.header
= PD_HEADER_LE(PD_DATA_VENDOR_DEF
,
2588 0, /* Cable Plug Indicator for DFP/UFP */
2590 port
->negotiated_rev_prime
,
2591 port
->message_id_prime
,
2594 msg
.header
= PD_HEADER_LE(PD_DATA_VENDOR_DEF
,
2597 port
->negotiated_rev
,
2601 for (i
= 0; i
< port
->vdo_count
; i
++)
2602 msg
.payload
[i
] = cpu_to_le32(port
->vdo_data
[i
]);
2603 res
= tcpm_pd_transmit(port
, port
->tx_sop_type
, &msg
);
2605 port
->vdm_state
= VDM_STATE_ERR_SEND
;
2607 unsigned long timeout
;
2609 port
->vdm_retries
= 0;
2610 port
->vdo_data
[0] = 0;
2611 port
->vdm_state
= VDM_STATE_BUSY
;
2612 timeout
= vdm_ready_timeout(vdo_hdr
);
2613 mod_vdm_delayed_work(port
, timeout
);
2621 static void vdm_state_machine_work(struct kthread_work
*work
)
2623 struct tcpm_port
*port
= container_of(work
, struct tcpm_port
, vdm_state_machine
);
2624 enum vdm_states prev_state
;
2626 mutex_lock(&port
->lock
);
2629 * Continue running as long as the port is not busy and there was
2633 prev_state
= port
->vdm_state
;
2634 vdm_run_state_machine(port
);
2635 } while (port
->vdm_state
!= prev_state
&&
2636 port
->vdm_state
!= VDM_STATE_BUSY
&&
2637 port
->vdm_state
!= VDM_STATE_SEND_MESSAGE
);
2639 if (port
->vdm_state
< VDM_STATE_READY
)
2640 port
->vdm_sm_running
= false;
2642 mutex_unlock(&port
->lock
);
2648 PDO_ERR_VSAFE5V_NOT_FIRST
,
2649 PDO_ERR_PDO_TYPE_NOT_IN_ORDER
,
2650 PDO_ERR_FIXED_NOT_SORTED
,
2651 PDO_ERR_VARIABLE_BATT_NOT_SORTED
,
2653 PDO_ERR_PPS_APDO_NOT_SORTED
,
2654 PDO_ERR_DUPE_PPS_APDO
,
2657 static const char * const pdo_err_msg
[] = {
2658 [PDO_ERR_NO_VSAFE5V
] =
2659 " err: source/sink caps should at least have vSafe5V",
2660 [PDO_ERR_VSAFE5V_NOT_FIRST
] =
2661 " err: vSafe5V Fixed Supply Object Shall always be the first object",
2662 [PDO_ERR_PDO_TYPE_NOT_IN_ORDER
] =
2663 " err: PDOs should be in the following order: Fixed; Battery; Variable",
2664 [PDO_ERR_FIXED_NOT_SORTED
] =
2665 " err: Fixed supply pdos should be in increasing order of their fixed voltage",
2666 [PDO_ERR_VARIABLE_BATT_NOT_SORTED
] =
2667 " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage",
2668 [PDO_ERR_DUPE_PDO
] =
2669 " err: Variable/Batt supply pdos cannot have same min/max voltage",
2670 [PDO_ERR_PPS_APDO_NOT_SORTED
] =
2671 " err: Programmable power supply apdos should be in increasing order of their maximum voltage",
2672 [PDO_ERR_DUPE_PPS_APDO
] =
2673 " err: Programmable power supply apdos cannot have same min/max voltage and max current",
2676 static enum pdo_err
tcpm_caps_err(struct tcpm_port
*port
, const u32
*pdo
,
2677 unsigned int nr_pdo
)
2681 /* Should at least contain vSafe5v */
2683 return PDO_ERR_NO_VSAFE5V
;
2685 /* The vSafe5V Fixed Supply Object Shall always be the first object */
2686 if (pdo_type(pdo
[0]) != PDO_TYPE_FIXED
||
2687 pdo_fixed_voltage(pdo
[0]) != VSAFE5V
)
2688 return PDO_ERR_VSAFE5V_NOT_FIRST
;
2690 for (i
= 1; i
< nr_pdo
; i
++) {
2691 if (pdo_type(pdo
[i
]) < pdo_type(pdo
[i
- 1])) {
2692 return PDO_ERR_PDO_TYPE_NOT_IN_ORDER
;
2693 } else if (pdo_type(pdo
[i
]) == pdo_type(pdo
[i
- 1])) {
2694 enum pd_pdo_type type
= pdo_type(pdo
[i
]);
2698 * The remaining Fixed Supply Objects, if
2699 * present, shall be sent in voltage order;
2700 * lowest to highest.
2702 case PDO_TYPE_FIXED
:
2703 if (pdo_fixed_voltage(pdo
[i
]) <=
2704 pdo_fixed_voltage(pdo
[i
- 1]))
2705 return PDO_ERR_FIXED_NOT_SORTED
;
2708 * The Battery Supply Objects and Variable
2709 * supply, if present shall be sent in Minimum
2710 * Voltage order; lowest to highest.
2714 if (pdo_min_voltage(pdo
[i
]) <
2715 pdo_min_voltage(pdo
[i
- 1]))
2716 return PDO_ERR_VARIABLE_BATT_NOT_SORTED
;
2717 else if ((pdo_min_voltage(pdo
[i
]) ==
2718 pdo_min_voltage(pdo
[i
- 1])) &&
2719 (pdo_max_voltage(pdo
[i
]) ==
2720 pdo_max_voltage(pdo
[i
- 1])))
2721 return PDO_ERR_DUPE_PDO
;
2724 * The Programmable Power Supply APDOs, if present,
2725 * shall be sent in Maximum Voltage order;
2726 * lowest to highest.
2729 if (pdo_apdo_type(pdo
[i
]) != APDO_TYPE_PPS
)
2732 if (pdo_pps_apdo_max_voltage(pdo
[i
]) <
2733 pdo_pps_apdo_max_voltage(pdo
[i
- 1]))
2734 return PDO_ERR_PPS_APDO_NOT_SORTED
;
2735 else if (pdo_pps_apdo_min_voltage(pdo
[i
]) ==
2736 pdo_pps_apdo_min_voltage(pdo
[i
- 1]) &&
2737 pdo_pps_apdo_max_voltage(pdo
[i
]) ==
2738 pdo_pps_apdo_max_voltage(pdo
[i
- 1]) &&
2739 pdo_pps_apdo_max_current(pdo
[i
]) ==
2740 pdo_pps_apdo_max_current(pdo
[i
- 1]))
2741 return PDO_ERR_DUPE_PPS_APDO
;
2744 tcpm_log_force(port
, " Unknown pdo type");
2752 static int tcpm_validate_caps(struct tcpm_port
*port
, const u32
*pdo
,
2753 unsigned int nr_pdo
)
2755 enum pdo_err err_index
= tcpm_caps_err(port
, pdo
, nr_pdo
);
2757 if (err_index
!= PDO_NO_ERR
) {
2758 tcpm_log_force(port
, " %s", pdo_err_msg
[err_index
]);
2765 static int tcpm_altmode_enter(struct typec_altmode
*altmode
, u32
*vdo
)
2767 struct tcpm_port
*port
= typec_altmode_get_drvdata(altmode
);
2771 svdm_version
= typec_get_negotiated_svdm_version(port
->typec_port
);
2772 if (svdm_version
< 0)
2773 return svdm_version
;
2775 header
= VDO(altmode
->svid
, vdo
? 2 : 1, svdm_version
, CMD_ENTER_MODE
);
2776 header
|= VDO_OPOS(altmode
->mode
);
2778 tcpm_queue_vdm_unlocked(port
, header
, vdo
, vdo
? 1 : 0, TCPC_TX_SOP
);
2782 static int tcpm_altmode_exit(struct typec_altmode
*altmode
)
2784 struct tcpm_port
*port
= typec_altmode_get_drvdata(altmode
);
2788 svdm_version
= typec_get_negotiated_svdm_version(port
->typec_port
);
2789 if (svdm_version
< 0)
2790 return svdm_version
;
2792 header
= VDO(altmode
->svid
, 1, svdm_version
, CMD_EXIT_MODE
);
2793 header
|= VDO_OPOS(altmode
->mode
);
2795 tcpm_queue_vdm_unlocked(port
, header
, NULL
, 0, TCPC_TX_SOP
);
2799 static int tcpm_altmode_vdm(struct typec_altmode
*altmode
,
2800 u32 header
, const u32
*data
, int count
)
2802 struct tcpm_port
*port
= typec_altmode_get_drvdata(altmode
);
2804 tcpm_queue_vdm_unlocked(port
, header
, data
, count
- 1, TCPC_TX_SOP
);
2809 static const struct typec_altmode_ops tcpm_altmode_ops
= {
2810 .enter
= tcpm_altmode_enter
,
2811 .exit
= tcpm_altmode_exit
,
2812 .vdm
= tcpm_altmode_vdm
,
2816 static int tcpm_cable_altmode_enter(struct typec_altmode
*altmode
, enum typec_plug_index sop
,
2819 struct tcpm_port
*port
= typec_altmode_get_drvdata(altmode
);
2823 svdm_version
= typec_get_cable_svdm_version(port
->typec_port
);
2824 if (svdm_version
< 0)
2825 return svdm_version
;
2827 header
= VDO(altmode
->svid
, vdo
? 2 : 1, svdm_version
, CMD_ENTER_MODE
);
2828 header
|= VDO_OPOS(altmode
->mode
);
2830 tcpm_queue_vdm_unlocked(port
, header
, vdo
, vdo
? 1 : 0, TCPC_TX_SOP_PRIME
);
2834 static int tcpm_cable_altmode_exit(struct typec_altmode
*altmode
, enum typec_plug_index sop
)
2836 struct tcpm_port
*port
= typec_altmode_get_drvdata(altmode
);
2840 svdm_version
= typec_get_cable_svdm_version(port
->typec_port
);
2841 if (svdm_version
< 0)
2842 return svdm_version
;
2844 header
= VDO(altmode
->svid
, 1, svdm_version
, CMD_EXIT_MODE
);
2845 header
|= VDO_OPOS(altmode
->mode
);
2847 tcpm_queue_vdm_unlocked(port
, header
, NULL
, 0, TCPC_TX_SOP_PRIME
);
2851 static int tcpm_cable_altmode_vdm(struct typec_altmode
*altmode
, enum typec_plug_index sop
,
2852 u32 header
, const u32
*data
, int count
)
2854 struct tcpm_port
*port
= typec_altmode_get_drvdata(altmode
);
2856 tcpm_queue_vdm_unlocked(port
, header
, data
, count
- 1, TCPC_TX_SOP_PRIME
);
2861 static const struct typec_cable_ops tcpm_cable_ops
= {
2862 .enter
= tcpm_cable_altmode_enter
,
2863 .exit
= tcpm_cable_altmode_exit
,
2864 .vdm
= tcpm_cable_altmode_vdm
,
2868 * PD (data, control) command handling functions
2870 static inline enum tcpm_state
ready_state(struct tcpm_port
*port
)
2872 if (port
->pwr_role
== TYPEC_SOURCE
)
2878 static int tcpm_pd_send_control(struct tcpm_port
*port
,
2879 enum pd_ctrl_msg_type type
,
2880 enum tcpm_transmit_type tx_sop_type
);
2882 static void tcpm_handle_alert(struct tcpm_port
*port
, const __le32
*payload
,
2885 u32 p0
= le32_to_cpu(payload
[0]);
2886 unsigned int type
= usb_pd_ado_type(p0
);
2889 tcpm_log(port
, "Alert message received with no type");
2890 tcpm_queue_message(port
, PD_MSG_CTRL_NOT_SUPP
);
2894 /* Just handling non-battery alerts for now */
2895 if (!(type
& USB_PD_ADO_TYPE_BATT_STATUS_CHANGE
)) {
2896 if (port
->pwr_role
== TYPEC_SOURCE
) {
2897 port
->upcoming_state
= GET_STATUS_SEND
;
2898 tcpm_ams_start(port
, GETTING_SOURCE_SINK_STATUS
);
2901 * Do not check SinkTxOk here in case the Source doesn't set its Rp to
2904 port
->ams
= GETTING_SOURCE_SINK_STATUS
;
2905 tcpm_set_state(port
, GET_STATUS_SEND
, 0);
2908 tcpm_queue_message(port
, PD_MSG_CTRL_NOT_SUPP
);
2912 static int tcpm_set_auto_vbus_discharge_threshold(struct tcpm_port
*port
,
2913 enum typec_pwr_opmode mode
, bool pps_active
,
2914 u32 requested_vbus_voltage
)
2918 if (!port
->tcpc
->set_auto_vbus_discharge_threshold
)
2921 ret
= port
->tcpc
->set_auto_vbus_discharge_threshold(port
->tcpc
, mode
, pps_active
,
2922 requested_vbus_voltage
);
2923 tcpm_log_force(port
,
2924 "set_auto_vbus_discharge_threshold mode:%d pps_active:%c vbus:%u ret:%d",
2925 mode
, pps_active
? 'y' : 'n', requested_vbus_voltage
, ret
);
2930 static void tcpm_pd_handle_state(struct tcpm_port
*port
,
2931 enum tcpm_state state
,
2933 unsigned int delay_ms
)
2935 switch (port
->state
) {
2939 tcpm_set_state(port
, state
, delay_ms
);
2941 /* 8.3.3.4.1.1 and 6.8.1 power transitioning */
2942 case SNK_TRANSITION_SINK
:
2943 case SNK_TRANSITION_SINK_VBUS
:
2944 case SRC_TRANSITION_SUPPLY
:
2945 tcpm_set_state(port
, HARD_RESET_SEND
, 0);
2948 if (!tcpm_ams_interruptible(port
)) {
2949 tcpm_set_state(port
, port
->pwr_role
== TYPEC_SOURCE
?
2950 SRC_SOFT_RESET_WAIT_SNK_TX
:
2954 /* process the Message 6.8.1 */
2955 port
->upcoming_state
= state
;
2956 port
->next_ams
= ams
;
2957 tcpm_set_state(port
, ready_state(port
), delay_ms
);
2963 static void tcpm_pd_handle_msg(struct tcpm_port
*port
,
2964 enum pd_msg_request message
,
2967 switch (port
->state
) {
2971 tcpm_queue_message(port
, message
);
2973 /* PD 3.0 Spec 8.3.3.4.1.1 and 6.8.1 */
2974 case SNK_TRANSITION_SINK
:
2975 case SNK_TRANSITION_SINK_VBUS
:
2976 case SRC_TRANSITION_SUPPLY
:
2977 tcpm_set_state(port
, HARD_RESET_SEND
, 0);
2980 if (!tcpm_ams_interruptible(port
)) {
2981 tcpm_set_state(port
, port
->pwr_role
== TYPEC_SOURCE
?
2982 SRC_SOFT_RESET_WAIT_SNK_TX
:
2986 port
->next_ams
= ams
;
2987 tcpm_set_state(port
, ready_state(port
), 0);
2988 /* 6.8.1 process the Message */
2989 tcpm_queue_message(port
, message
);
2995 static int tcpm_register_source_caps(struct tcpm_port
*port
)
2997 struct usb_power_delivery_desc desc
= { port
->negotiated_rev
};
2998 struct usb_power_delivery_capabilities_desc caps
= { };
2999 struct usb_power_delivery_capabilities
*cap
;
3001 if (!port
->partner_pd
)
3002 port
->partner_pd
= usb_power_delivery_register(NULL
, &desc
);
3003 if (IS_ERR(port
->partner_pd
))
3004 return PTR_ERR(port
->partner_pd
);
3006 memcpy(caps
.pdo
, port
->source_caps
, sizeof(u32
) * port
->nr_source_caps
);
3007 caps
.role
= TYPEC_SOURCE
;
3009 cap
= usb_power_delivery_register_capabilities(port
->partner_pd
, &caps
);
3011 return PTR_ERR(cap
);
3013 port
->partner_source_caps
= cap
;
3018 static int tcpm_register_sink_caps(struct tcpm_port
*port
)
3020 struct usb_power_delivery_desc desc
= { port
->negotiated_rev
};
3021 struct usb_power_delivery_capabilities_desc caps
= { };
3022 struct usb_power_delivery_capabilities
*cap
;
3024 if (!port
->partner_pd
)
3025 port
->partner_pd
= usb_power_delivery_register(NULL
, &desc
);
3026 if (IS_ERR(port
->partner_pd
))
3027 return PTR_ERR(port
->partner_pd
);
3029 memcpy(caps
.pdo
, port
->sink_caps
, sizeof(u32
) * port
->nr_sink_caps
);
3030 caps
.role
= TYPEC_SINK
;
3032 cap
= usb_power_delivery_register_capabilities(port
->partner_pd
, &caps
);
3034 return PTR_ERR(cap
);
3036 port
->partner_sink_caps
= cap
;
3041 static void tcpm_pd_data_request(struct tcpm_port
*port
,
3042 const struct pd_message
*msg
,
3043 enum tcpm_transmit_type rx_sop_type
)
3045 enum pd_data_msg_type type
= pd_header_type_le(msg
->header
);
3046 unsigned int cnt
= pd_header_cnt_le(msg
->header
);
3047 unsigned int rev
= pd_header_rev_le(msg
->header
);
3049 enum frs_typec_current partner_frs_current
;
3053 if (tcpm_vdm_ams(port
) && type
!= PD_DATA_VENDOR_DEF
) {
3054 port
->vdm_state
= VDM_STATE_ERR_BUSY
;
3055 tcpm_ams_finish(port
);
3056 mod_vdm_delayed_work(port
, 0);
3060 case PD_DATA_SOURCE_CAP
:
3061 for (i
= 0; i
< cnt
; i
++)
3062 port
->source_caps
[i
] = le32_to_cpu(msg
->payload
[i
]);
3064 port
->nr_source_caps
= cnt
;
3066 tcpm_log_source_caps(port
);
3068 tcpm_validate_caps(port
, port
->source_caps
,
3069 port
->nr_source_caps
);
3071 tcpm_register_source_caps(port
);
3074 * Adjust revision in subsequent message headers, as required,
3075 * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
3076 * support Rev 1.0 so just do nothing in that scenario.
3078 if (rev
== PD_REV10
) {
3079 if (port
->ams
== GET_SOURCE_CAPABILITIES
)
3080 tcpm_ams_finish(port
);
3084 if (rev
< PD_MAX_REV
) {
3085 port
->negotiated_rev
= rev
;
3086 if (port
->negotiated_rev_prime
> port
->negotiated_rev
)
3087 port
->negotiated_rev_prime
= port
->negotiated_rev
;
3090 if (port
->pwr_role
== TYPEC_SOURCE
) {
3091 if (port
->ams
== GET_SOURCE_CAPABILITIES
)
3092 tcpm_pd_handle_state(port
, SRC_READY
, NONE_AMS
, 0);
3093 /* Unexpected Source Capabilities */
3095 tcpm_pd_handle_msg(port
,
3096 port
->negotiated_rev
< PD_REV30
?
3097 PD_MSG_CTRL_REJECT
:
3098 PD_MSG_CTRL_NOT_SUPP
,
3100 } else if (port
->state
== SNK_WAIT_CAPABILITIES
) {
3102 * This message may be received even if VBUS is not
3103 * present. This is quite unexpected; see USB PD
3104 * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2.
3105 * However, at the same time, we must be ready to
3106 * receive this message and respond to it 15ms after
3107 * receiving PS_RDY during power swap operations, no matter
3108 * if VBUS is available or not (USB PD specification,
3110 * So we need to accept the message either way,
3111 * but be prepared to keep waiting for VBUS after it was
3114 port
->ams
= POWER_NEGOTIATION
;
3115 port
->in_ams
= true;
3116 tcpm_set_state(port
, SNK_NEGOTIATE_CAPABILITIES
, 0);
3118 if (port
->ams
== GET_SOURCE_CAPABILITIES
)
3119 tcpm_ams_finish(port
);
3120 tcpm_pd_handle_state(port
, SNK_NEGOTIATE_CAPABILITIES
,
3121 POWER_NEGOTIATION
, 0);
3124 case PD_DATA_REQUEST
:
3126 * Adjust revision in subsequent message headers, as required,
3127 * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
3128 * support Rev 1.0 so just reject in that scenario.
3130 if (rev
== PD_REV10
) {
3131 tcpm_pd_handle_msg(port
,
3132 port
->negotiated_rev
< PD_REV30
?
3133 PD_MSG_CTRL_REJECT
:
3134 PD_MSG_CTRL_NOT_SUPP
,
3139 if (rev
< PD_MAX_REV
) {
3140 port
->negotiated_rev
= rev
;
3141 if (port
->negotiated_rev_prime
> port
->negotiated_rev
)
3142 port
->negotiated_rev_prime
= port
->negotiated_rev
;
3145 if (port
->pwr_role
!= TYPEC_SOURCE
|| cnt
!= 1) {
3146 tcpm_pd_handle_msg(port
,
3147 port
->negotiated_rev
< PD_REV30
?
3148 PD_MSG_CTRL_REJECT
:
3149 PD_MSG_CTRL_NOT_SUPP
,
3154 port
->sink_request
= le32_to_cpu(msg
->payload
[0]);
3156 if (port
->vdm_sm_running
&& port
->explicit_contract
) {
3157 tcpm_pd_handle_msg(port
, PD_MSG_CTRL_WAIT
, port
->ams
);
3161 if (port
->state
== SRC_SEND_CAPABILITIES
)
3162 tcpm_set_state(port
, SRC_NEGOTIATE_CAPABILITIES
, 0);
3164 tcpm_pd_handle_state(port
, SRC_NEGOTIATE_CAPABILITIES
,
3165 POWER_NEGOTIATION
, 0);
3167 case PD_DATA_SINK_CAP
:
3168 /* We don't do anything with this at the moment... */
3169 for (i
= 0; i
< cnt
; i
++)
3170 port
->sink_caps
[i
] = le32_to_cpu(msg
->payload
[i
]);
3172 partner_frs_current
= (port
->sink_caps
[0] & PDO_FIXED_FRS_CURR_MASK
) >>
3173 PDO_FIXED_FRS_CURR_SHIFT
;
3174 frs_enable
= partner_frs_current
&& (partner_frs_current
<=
3175 port
->new_source_frs_current
);
3177 "Port partner FRS capable partner_frs_current:%u port_frs_current:%u enable:%c",
3178 partner_frs_current
, port
->new_source_frs_current
, frs_enable
? 'y' : 'n');
3180 ret
= port
->tcpc
->enable_frs(port
->tcpc
, true);
3181 tcpm_log(port
, "Enable FRS %s, ret:%d\n", ret
? "fail" : "success", ret
);
3184 port
->nr_sink_caps
= cnt
;
3185 port
->sink_cap_done
= true;
3186 tcpm_register_sink_caps(port
);
3188 if (port
->ams
== GET_SINK_CAPABILITIES
)
3189 tcpm_set_state(port
, ready_state(port
), 0);
3190 /* Unexpected Sink Capabilities */
3192 tcpm_pd_handle_msg(port
,
3193 port
->negotiated_rev
< PD_REV30
?
3194 PD_MSG_CTRL_REJECT
:
3195 PD_MSG_CTRL_NOT_SUPP
,
3198 case PD_DATA_VENDOR_DEF
:
3199 tcpm_handle_vdm_request(port
, msg
->payload
, cnt
, rx_sop_type
);
3202 port
->bist_request
= le32_to_cpu(msg
->payload
[0]);
3203 tcpm_pd_handle_state(port
, BIST_RX
, BIST
, 0);
3206 if (port
->state
!= SRC_READY
&& port
->state
!= SNK_READY
)
3207 tcpm_pd_handle_state(port
, port
->pwr_role
== TYPEC_SOURCE
?
3208 SRC_SOFT_RESET_WAIT_SNK_TX
: SNK_SOFT_RESET
,
3211 tcpm_handle_alert(port
, msg
->payload
, cnt
);
3213 case PD_DATA_BATT_STATUS
:
3214 case PD_DATA_GET_COUNTRY_INFO
:
3215 /* Currently unsupported */
3216 tcpm_pd_handle_msg(port
, port
->negotiated_rev
< PD_REV30
?
3217 PD_MSG_CTRL_REJECT
:
3218 PD_MSG_CTRL_NOT_SUPP
,
3222 tcpm_pd_handle_msg(port
, port
->negotiated_rev
< PD_REV30
?
3223 PD_MSG_CTRL_REJECT
:
3224 PD_MSG_CTRL_NOT_SUPP
,
3226 tcpm_log(port
, "Unrecognized data message type %#x", type
);
3231 static void tcpm_pps_complete(struct tcpm_port
*port
, int result
)
3233 if (port
->pps_pending
) {
3234 port
->pps_status
= result
;
3235 port
->pps_pending
= false;
3236 complete(&port
->pps_complete
);
3240 static void tcpm_pd_ctrl_request(struct tcpm_port
*port
,
3241 const struct pd_message
*msg
,
3242 enum tcpm_transmit_type rx_sop_type
)
3244 enum pd_ctrl_msg_type type
= pd_header_type_le(msg
->header
);
3245 enum tcpm_state next_state
;
3246 unsigned int rev
= pd_header_rev_le(msg
->header
);
3249 * Stop VDM state machine if interrupted by other Messages while NOT_SUPP is allowed in
3250 * VDM AMS if waiting for VDM responses and will be handled later.
3252 if (tcpm_vdm_ams(port
) && type
!= PD_CTRL_NOT_SUPP
&& type
!= PD_CTRL_GOOD_CRC
) {
3253 port
->vdm_state
= VDM_STATE_ERR_BUSY
;
3254 tcpm_ams_finish(port
);
3255 mod_vdm_delayed_work(port
, 0);
3259 case PD_CTRL_GOOD_CRC
:
3262 case PD_CTRL_GET_SOURCE_CAP
:
3263 tcpm_pd_handle_msg(port
, PD_MSG_DATA_SOURCE_CAP
, GET_SOURCE_CAPABILITIES
);
3265 case PD_CTRL_GET_SINK_CAP
:
3266 tcpm_pd_handle_msg(port
, PD_MSG_DATA_SINK_CAP
, GET_SINK_CAPABILITIES
);
3268 case PD_CTRL_GOTO_MIN
:
3270 case PD_CTRL_PS_RDY
:
3271 switch (port
->state
) {
3272 case SNK_TRANSITION_SINK
:
3273 if (port
->vbus_present
) {
3274 tcpm_set_current_limit(port
,
3275 port
->req_current_limit
,
3276 port
->req_supply_voltage
);
3277 port
->explicit_contract
= true;
3278 tcpm_set_auto_vbus_discharge_threshold(port
,
3280 port
->pps_data
.active
,
3281 port
->supply_voltage
);
3282 tcpm_set_state(port
, SNK_READY
, 0);
3285 * Seen after power swap. Keep waiting for VBUS
3286 * in a transitional state.
3288 tcpm_set_state(port
,
3289 SNK_TRANSITION_SINK_VBUS
, 0);
3292 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED
:
3293 tcpm_set_state(port
, PR_SWAP_SRC_SNK_SINK_ON
, 0);
3295 case PR_SWAP_SNK_SRC_SINK_OFF
:
3296 tcpm_set_state(port
, PR_SWAP_SNK_SRC_SOURCE_ON
, 0);
3298 case VCONN_SWAP_WAIT_FOR_VCONN
:
3299 tcpm_set_state(port
, VCONN_SWAP_TURN_OFF_VCONN
, 0);
3301 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF
:
3302 tcpm_set_state(port
, FR_SWAP_SNK_SRC_NEW_SINK_READY
, 0);
3305 tcpm_pd_handle_state(port
,
3306 port
->pwr_role
== TYPEC_SOURCE
?
3307 SRC_SOFT_RESET_WAIT_SNK_TX
:
3313 case PD_CTRL_REJECT
:
3315 case PD_CTRL_NOT_SUPP
:
3316 switch (port
->state
) {
3317 case SNK_NEGOTIATE_CAPABILITIES
:
3318 /* USB PD specification, Figure 8-43 */
3319 if (port
->explicit_contract
)
3320 next_state
= SNK_READY
;
3322 next_state
= SNK_WAIT_CAPABILITIES
;
3324 /* Threshold was relaxed before sending Request. Restore it back. */
3325 tcpm_set_auto_vbus_discharge_threshold(port
, TYPEC_PWR_MODE_PD
,
3326 port
->pps_data
.active
,
3327 port
->supply_voltage
);
3328 tcpm_set_state(port
, next_state
, 0);
3330 case SNK_NEGOTIATE_PPS_CAPABILITIES
:
3331 /* Revert data back from any requested PPS updates */
3332 port
->pps_data
.req_out_volt
= port
->supply_voltage
;
3333 port
->pps_data
.req_op_curr
= port
->current_limit
;
3334 port
->pps_status
= (type
== PD_CTRL_WAIT
?
3335 -EAGAIN
: -EOPNOTSUPP
);
3337 /* Threshold was relaxed before sending Request. Restore it back. */
3338 tcpm_set_auto_vbus_discharge_threshold(port
, TYPEC_PWR_MODE_PD
,
3339 port
->pps_data
.active
,
3340 port
->supply_voltage
);
3342 tcpm_set_state(port
, SNK_READY
, 0);
3345 port
->swap_status
= (type
== PD_CTRL_WAIT
?
3346 -EAGAIN
: -EOPNOTSUPP
);
3347 tcpm_set_state(port
, DR_SWAP_CANCEL
, 0);
3350 port
->swap_status
= (type
== PD_CTRL_WAIT
?
3351 -EAGAIN
: -EOPNOTSUPP
);
3352 tcpm_set_state(port
, PR_SWAP_CANCEL
, 0);
3354 case VCONN_SWAP_SEND
:
3355 port
->swap_status
= (type
== PD_CTRL_WAIT
?
3356 -EAGAIN
: -EOPNOTSUPP
);
3357 tcpm_set_state(port
, VCONN_SWAP_CANCEL
, 0);
3360 tcpm_set_state(port
, FR_SWAP_CANCEL
, 0);
3363 port
->sink_cap_done
= true;
3364 tcpm_set_state(port
, ready_state(port
), 0);
3367 * Some port partners do not support GET_STATUS, avoid soft reset the link to
3368 * prevent redundant power re-negotiation
3370 case GET_STATUS_SEND
:
3371 tcpm_set_state(port
, ready_state(port
), 0);
3375 if (port
->vdm_state
> VDM_STATE_READY
) {
3376 port
->vdm_state
= VDM_STATE_DONE
;
3377 if (tcpm_vdm_ams(port
))
3378 tcpm_ams_finish(port
);
3379 mod_vdm_delayed_work(port
, 0);
3384 tcpm_pd_handle_state(port
,
3385 port
->pwr_role
== TYPEC_SOURCE
?
3386 SRC_SOFT_RESET_WAIT_SNK_TX
:
3392 case PD_CTRL_ACCEPT
:
3393 switch (port
->state
) {
3394 case SNK_NEGOTIATE_CAPABILITIES
:
3395 port
->pps_data
.active
= false;
3396 tcpm_set_state(port
, SNK_TRANSITION_SINK
, 0);
3398 case SNK_NEGOTIATE_PPS_CAPABILITIES
:
3399 port
->pps_data
.active
= true;
3400 port
->pps_data
.min_volt
= port
->pps_data
.req_min_volt
;
3401 port
->pps_data
.max_volt
= port
->pps_data
.req_max_volt
;
3402 port
->pps_data
.max_curr
= port
->pps_data
.req_max_curr
;
3403 port
->req_supply_voltage
= port
->pps_data
.req_out_volt
;
3404 port
->req_current_limit
= port
->pps_data
.req_op_curr
;
3405 power_supply_changed(port
->psy
);
3406 tcpm_set_state(port
, SNK_TRANSITION_SINK
, 0);
3408 case SOFT_RESET_SEND
:
3409 if (port
->ams
== SOFT_RESET_AMS
)
3410 tcpm_ams_finish(port
);
3412 * SOP' Soft Reset is done after Vconn Swap,
3413 * which returns to ready state
3415 if (rx_sop_type
== TCPC_TX_SOP_PRIME
) {
3416 if (rev
< port
->negotiated_rev_prime
)
3417 port
->negotiated_rev_prime
= rev
;
3418 tcpm_set_state(port
, ready_state(port
), 0);
3421 if (port
->pwr_role
== TYPEC_SOURCE
) {
3422 port
->upcoming_state
= SRC_SEND_CAPABILITIES
;
3423 tcpm_ams_start(port
, POWER_NEGOTIATION
);
3425 tcpm_set_state(port
, SNK_WAIT_CAPABILITIES
, 0);
3429 tcpm_set_state(port
, DR_SWAP_CHANGE_DR
, 0);
3432 tcpm_set_state(port
, PR_SWAP_START
, 0);
3434 case VCONN_SWAP_SEND
:
3435 tcpm_set_state(port
, VCONN_SWAP_START
, 0);
3438 tcpm_set_state(port
, FR_SWAP_SNK_SRC_TRANSITION_TO_OFF
, 0);
3441 tcpm_pd_handle_state(port
,
3442 port
->pwr_role
== TYPEC_SOURCE
?
3443 SRC_SOFT_RESET_WAIT_SNK_TX
:
3449 case PD_CTRL_SOFT_RESET
:
3450 port
->ams
= SOFT_RESET_AMS
;
3451 tcpm_set_state(port
, SOFT_RESET
, 0);
3453 case PD_CTRL_DR_SWAP
:
3456 * 6.3.9: If an alternate mode is active, a request to swap
3457 * alternate modes shall trigger a port reset.
3459 if (port
->typec_caps
.data
!= TYPEC_PORT_DRD
) {
3460 tcpm_pd_handle_msg(port
,
3461 port
->negotiated_rev
< PD_REV30
?
3462 PD_MSG_CTRL_REJECT
:
3463 PD_MSG_CTRL_NOT_SUPP
,
3466 if (port
->send_discover
&& port
->negotiated_rev
< PD_REV30
) {
3467 tcpm_queue_message(port
, PD_MSG_CTRL_WAIT
);
3471 tcpm_pd_handle_state(port
, DR_SWAP_ACCEPT
, DATA_ROLE_SWAP
, 0);
3474 case PD_CTRL_PR_SWAP
:
3475 if (port
->port_type
!= TYPEC_PORT_DRP
) {
3476 tcpm_pd_handle_msg(port
,
3477 port
->negotiated_rev
< PD_REV30
?
3478 PD_MSG_CTRL_REJECT
:
3479 PD_MSG_CTRL_NOT_SUPP
,
3482 if (port
->send_discover
&& port
->negotiated_rev
< PD_REV30
) {
3483 tcpm_queue_message(port
, PD_MSG_CTRL_WAIT
);
3487 tcpm_pd_handle_state(port
, PR_SWAP_ACCEPT
, POWER_ROLE_SWAP
, 0);
3490 case PD_CTRL_VCONN_SWAP
:
3491 if (port
->send_discover
&& port
->negotiated_rev
< PD_REV30
) {
3492 tcpm_queue_message(port
, PD_MSG_CTRL_WAIT
);
3496 tcpm_pd_handle_state(port
, VCONN_SWAP_ACCEPT
, VCONN_SWAP
, 0);
3498 case PD_CTRL_GET_SOURCE_CAP_EXT
:
3499 case PD_CTRL_GET_STATUS
:
3500 case PD_CTRL_FR_SWAP
:
3501 case PD_CTRL_GET_PPS_STATUS
:
3502 case PD_CTRL_GET_COUNTRY_CODES
:
3503 /* Currently not supported */
3504 tcpm_pd_handle_msg(port
,
3505 port
->negotiated_rev
< PD_REV30
?
3506 PD_MSG_CTRL_REJECT
:
3507 PD_MSG_CTRL_NOT_SUPP
,
3511 tcpm_pd_handle_msg(port
,
3512 port
->negotiated_rev
< PD_REV30
?
3513 PD_MSG_CTRL_REJECT
:
3514 PD_MSG_CTRL_NOT_SUPP
,
3516 tcpm_log(port
, "Unrecognized ctrl message type %#x", type
);
3521 static void tcpm_pd_ext_msg_request(struct tcpm_port
*port
,
3522 const struct pd_message
*msg
)
3524 enum pd_ext_msg_type type
= pd_header_type_le(msg
->header
);
3525 unsigned int data_size
= pd_ext_header_data_size_le(msg
->ext_msg
.header
);
3527 /* stopping VDM state machine if interrupted by other Messages */
3528 if (tcpm_vdm_ams(port
)) {
3529 port
->vdm_state
= VDM_STATE_ERR_BUSY
;
3530 tcpm_ams_finish(port
);
3531 mod_vdm_delayed_work(port
, 0);
3534 if (!(le16_to_cpu(msg
->ext_msg
.header
) & PD_EXT_HDR_CHUNKED
)) {
3535 tcpm_pd_handle_msg(port
, PD_MSG_CTRL_NOT_SUPP
, NONE_AMS
);
3536 tcpm_log(port
, "Unchunked extended messages unsupported");
3540 if (data_size
> PD_EXT_MAX_CHUNK_DATA
) {
3541 tcpm_pd_handle_state(port
, CHUNK_NOT_SUPP
, NONE_AMS
, PD_T_CHUNK_NOT_SUPP
);
3542 tcpm_log(port
, "Chunk handling not yet supported");
3548 case PD_EXT_PPS_STATUS
:
3549 if (port
->ams
== GETTING_SOURCE_SINK_STATUS
) {
3550 tcpm_ams_finish(port
);
3551 tcpm_set_state(port
, ready_state(port
), 0);
3553 /* unexpected Status or PPS_Status Message */
3554 tcpm_pd_handle_state(port
, port
->pwr_role
== TYPEC_SOURCE
?
3555 SRC_SOFT_RESET_WAIT_SNK_TX
: SNK_SOFT_RESET
,
3559 case PD_EXT_SOURCE_CAP_EXT
:
3560 case PD_EXT_GET_BATT_CAP
:
3561 case PD_EXT_GET_BATT_STATUS
:
3562 case PD_EXT_BATT_CAP
:
3563 case PD_EXT_GET_MANUFACTURER_INFO
:
3564 case PD_EXT_MANUFACTURER_INFO
:
3565 case PD_EXT_SECURITY_REQUEST
:
3566 case PD_EXT_SECURITY_RESPONSE
:
3567 case PD_EXT_FW_UPDATE_REQUEST
:
3568 case PD_EXT_FW_UPDATE_RESPONSE
:
3569 case PD_EXT_COUNTRY_INFO
:
3570 case PD_EXT_COUNTRY_CODES
:
3571 tcpm_pd_handle_msg(port
, PD_MSG_CTRL_NOT_SUPP
, NONE_AMS
);
3574 tcpm_pd_handle_msg(port
, PD_MSG_CTRL_NOT_SUPP
, NONE_AMS
);
3575 tcpm_log(port
, "Unrecognized extended message type %#x", type
);
3580 static void tcpm_pd_rx_handler(struct kthread_work
*work
)
3582 struct pd_rx_event
*event
= container_of(work
,
3583 struct pd_rx_event
, work
);
3584 const struct pd_message
*msg
= &event
->msg
;
3585 unsigned int cnt
= pd_header_cnt_le(msg
->header
);
3586 struct tcpm_port
*port
= event
->port
;
3587 enum tcpm_transmit_type rx_sop_type
= event
->rx_sop_type
;
3589 mutex_lock(&port
->lock
);
3591 tcpm_log(port
, "PD RX, header: %#x [%d]", le16_to_cpu(msg
->header
),
3594 if (port
->attached
) {
3595 enum pd_ctrl_msg_type type
= pd_header_type_le(msg
->header
);
3596 unsigned int msgid
= pd_header_msgid_le(msg
->header
);
3599 * Drop SOP' messages if cannot receive via
3600 * tcpm_can_communicate_sop_prime
3602 if (rx_sop_type
== TCPC_TX_SOP_PRIME
&&
3603 !tcpm_can_communicate_sop_prime(port
))
3607 * USB PD standard, 6.6.1.2:
3608 * "... if MessageID value in a received Message is the
3609 * same as the stored value, the receiver shall return a
3610 * GoodCRC Message with that MessageID value and drop
3611 * the Message (this is a retry of an already received
3612 * Message). Note: this shall not apply to the Soft_Reset
3613 * Message which always has a MessageID value of zero."
3615 switch (rx_sop_type
) {
3616 case TCPC_TX_SOP_PRIME
:
3617 if (msgid
== port
->rx_msgid_prime
)
3619 port
->rx_msgid_prime
= msgid
;
3623 if (msgid
== port
->rx_msgid
&& type
!= PD_CTRL_SOFT_RESET
)
3625 port
->rx_msgid
= msgid
;
3630 * If both ends believe to be DFP/host, we have a data role
3633 if (!!(le16_to_cpu(msg
->header
) & PD_HEADER_DATA_ROLE
) ==
3634 (port
->data_role
== TYPEC_HOST
) && rx_sop_type
== TCPC_TX_SOP
) {
3636 "Data role mismatch, initiating error recovery");
3637 tcpm_set_state(port
, ERROR_RECOVERY
, 0);
3639 if (le16_to_cpu(msg
->header
) & PD_HEADER_EXT_HDR
)
3640 tcpm_pd_ext_msg_request(port
, msg
);
3642 tcpm_pd_data_request(port
, msg
, rx_sop_type
);
3644 tcpm_pd_ctrl_request(port
, msg
, rx_sop_type
);
3649 mutex_unlock(&port
->lock
);
3653 void tcpm_pd_receive(struct tcpm_port
*port
, const struct pd_message
*msg
,
3654 enum tcpm_transmit_type rx_sop_type
)
3656 struct pd_rx_event
*event
;
3658 event
= kzalloc(sizeof(*event
), GFP_ATOMIC
);
3662 kthread_init_work(&event
->work
, tcpm_pd_rx_handler
);
3664 event
->rx_sop_type
= rx_sop_type
;
3665 memcpy(&event
->msg
, msg
, sizeof(*msg
));
3666 kthread_queue_work(port
->wq
, &event
->work
);
3668 EXPORT_SYMBOL_GPL(tcpm_pd_receive
);
3670 static int tcpm_pd_send_control(struct tcpm_port
*port
,
3671 enum pd_ctrl_msg_type type
,
3672 enum tcpm_transmit_type tx_sop_type
)
3674 struct pd_message msg
;
3676 memset(&msg
, 0, sizeof(msg
));
3677 switch (tx_sop_type
) {
3678 case TCPC_TX_SOP_PRIME
:
3679 msg
.header
= PD_HEADER_LE(type
,
3680 0, /* Cable Plug Indicator for DFP/UFP */
3682 port
->negotiated_rev
,
3683 port
->message_id_prime
,
3687 msg
.header
= PD_HEADER_LE(type
,
3690 port
->negotiated_rev
,
3695 msg
.header
= PD_HEADER_LE(type
,
3698 port
->negotiated_rev
,
3704 return tcpm_pd_transmit(port
, tx_sop_type
, &msg
);
3708 * Send queued message without affecting state.
3709 * Return true if state machine should go back to sleep,
3712 static bool tcpm_send_queued_message(struct tcpm_port
*port
)
3714 enum pd_msg_request queued_message
;
3718 queued_message
= port
->queued_message
;
3719 port
->queued_message
= PD_MSG_NONE
;
3721 switch (queued_message
) {
3722 case PD_MSG_CTRL_WAIT
:
3723 tcpm_pd_send_control(port
, PD_CTRL_WAIT
, TCPC_TX_SOP
);
3725 case PD_MSG_CTRL_REJECT
:
3726 tcpm_pd_send_control(port
, PD_CTRL_REJECT
, TCPC_TX_SOP
);
3728 case PD_MSG_CTRL_NOT_SUPP
:
3729 tcpm_pd_send_control(port
, PD_CTRL_NOT_SUPP
, TCPC_TX_SOP
);
3731 case PD_MSG_DATA_SINK_CAP
:
3732 ret
= tcpm_pd_send_sink_caps(port
);
3734 tcpm_log(port
, "Unable to send snk caps, ret=%d", ret
);
3735 tcpm_set_state(port
, SNK_SOFT_RESET
, 0);
3737 tcpm_ams_finish(port
);
3739 case PD_MSG_DATA_SOURCE_CAP
:
3740 ret
= tcpm_pd_send_source_caps(port
);
3743 "Unable to send src caps, ret=%d",
3745 tcpm_set_state(port
, SOFT_RESET_SEND
, 0);
3746 } else if (port
->pwr_role
== TYPEC_SOURCE
) {
3747 tcpm_ams_finish(port
);
3748 tcpm_set_state(port
, HARD_RESET_SEND
,
3749 PD_T_SENDER_RESPONSE
);
3751 tcpm_ams_finish(port
);
3757 } while (port
->queued_message
!= PD_MSG_NONE
);
3759 if (port
->delayed_state
!= INVALID_STATE
) {
3760 if (ktime_after(port
->delayed_runtime
, ktime_get())) {
3761 mod_tcpm_delayed_work(port
, ktime_to_ms(ktime_sub(port
->delayed_runtime
,
3765 port
->delayed_state
= INVALID_STATE
;
3770 static int tcpm_pd_check_request(struct tcpm_port
*port
)
3772 u32 pdo
, rdo
= port
->sink_request
;
3773 unsigned int max
, op
, pdo_max
, index
;
3774 enum pd_pdo_type type
;
3776 index
= rdo_index(rdo
);
3777 if (!index
|| index
> port
->nr_src_pdo
)
3780 pdo
= port
->src_pdo
[index
- 1];
3781 type
= pdo_type(pdo
);
3783 case PDO_TYPE_FIXED
:
3785 max
= rdo_max_current(rdo
);
3786 op
= rdo_op_current(rdo
);
3787 pdo_max
= pdo_max_current(pdo
);
3791 if (max
> pdo_max
&& !(rdo
& RDO_CAP_MISMATCH
))
3794 if (type
== PDO_TYPE_FIXED
)
3796 "Requested %u mV, %u mA for %u / %u mA",
3797 pdo_fixed_voltage(pdo
), pdo_max
, op
, max
);
3800 "Requested %u -> %u mV, %u mA for %u / %u mA",
3801 pdo_min_voltage(pdo
), pdo_max_voltage(pdo
),
3805 max
= rdo_max_power(rdo
);
3806 op
= rdo_op_power(rdo
);
3807 pdo_max
= pdo_max_power(pdo
);
3811 if (max
> pdo_max
&& !(rdo
& RDO_CAP_MISMATCH
))
3814 "Requested %u -> %u mV, %u mW for %u / %u mW",
3815 pdo_min_voltage(pdo
), pdo_max_voltage(pdo
),
3822 port
->op_vsafe5v
= index
== 1;
3827 #define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y))
3828 #define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y))
3830 static int tcpm_pd_select_pdo(struct tcpm_port
*port
, int *sink_pdo
,
3833 unsigned int i
, j
, max_src_mv
= 0, min_src_mv
= 0, max_mw
= 0,
3834 max_mv
= 0, src_mw
= 0, src_ma
= 0, max_snk_mv
= 0,
3838 port
->pps_data
.supported
= false;
3839 port
->usb_type
= POWER_SUPPLY_USB_TYPE_PD
;
3840 power_supply_changed(port
->psy
);
3843 * Select the source PDO providing the most power which has a
3846 for (i
= 0; i
< port
->nr_source_caps
; i
++) {
3847 u32 pdo
= port
->source_caps
[i
];
3848 enum pd_pdo_type type
= pdo_type(pdo
);
3851 case PDO_TYPE_FIXED
:
3852 max_src_mv
= pdo_fixed_voltage(pdo
);
3853 min_src_mv
= max_src_mv
;
3857 max_src_mv
= pdo_max_voltage(pdo
);
3858 min_src_mv
= pdo_min_voltage(pdo
);
3861 if (pdo_apdo_type(pdo
) == APDO_TYPE_PPS
) {
3862 port
->pps_data
.supported
= true;
3864 POWER_SUPPLY_USB_TYPE_PD_PPS
;
3865 power_supply_changed(port
->psy
);
3869 tcpm_log(port
, "Invalid source PDO type, ignoring");
3874 case PDO_TYPE_FIXED
:
3876 src_ma
= pdo_max_current(pdo
);
3877 src_mw
= src_ma
* min_src_mv
/ 1000;
3880 src_mw
= pdo_max_power(pdo
);
3885 tcpm_log(port
, "Invalid source PDO type, ignoring");
3889 for (j
= 0; j
< port
->nr_snk_pdo
; j
++) {
3890 pdo
= port
->snk_pdo
[j
];
3892 switch (pdo_type(pdo
)) {
3893 case PDO_TYPE_FIXED
:
3894 max_snk_mv
= pdo_fixed_voltage(pdo
);
3895 min_snk_mv
= max_snk_mv
;
3899 max_snk_mv
= pdo_max_voltage(pdo
);
3900 min_snk_mv
= pdo_min_voltage(pdo
);
3905 tcpm_log(port
, "Invalid sink PDO type, ignoring");
3909 if (max_src_mv
<= max_snk_mv
&&
3910 min_src_mv
>= min_snk_mv
) {
3911 /* Prefer higher voltages if available */
3912 if ((src_mw
== max_mw
&& min_src_mv
> max_mv
) ||
3917 max_mv
= min_src_mv
;
3927 static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port
*port
)
3929 unsigned int i
, src_ma
, max_temp_mw
= 0, max_op_ma
, op_mw
;
3930 unsigned int src_pdo
= 0;
3933 for (i
= 1; i
< port
->nr_source_caps
; ++i
) {
3934 pdo
= port
->source_caps
[i
];
3936 switch (pdo_type(pdo
)) {
3938 if (pdo_apdo_type(pdo
) != APDO_TYPE_PPS
) {
3939 tcpm_log(port
, "Not PPS APDO (source), ignoring");
3943 if (port
->pps_data
.req_out_volt
> pdo_pps_apdo_max_voltage(pdo
) ||
3944 port
->pps_data
.req_out_volt
< pdo_pps_apdo_min_voltage(pdo
))
3947 src_ma
= pdo_pps_apdo_max_current(pdo
);
3948 max_op_ma
= min(src_ma
, port
->pps_data
.req_op_curr
);
3949 op_mw
= max_op_ma
* port
->pps_data
.req_out_volt
/ 1000;
3950 if (op_mw
> max_temp_mw
) {
3952 max_temp_mw
= op_mw
;
3956 tcpm_log(port
, "Not APDO type (source), ignoring");
3962 src
= port
->source_caps
[src_pdo
];
3964 port
->pps_data
.req_min_volt
= pdo_pps_apdo_min_voltage(src
);
3965 port
->pps_data
.req_max_volt
= pdo_pps_apdo_max_voltage(src
);
3966 port
->pps_data
.req_max_curr
= pdo_pps_apdo_max_current(src
);
3967 port
->pps_data
.req_op_curr
= min(port
->pps_data
.req_max_curr
,
3968 port
->pps_data
.req_op_curr
);
3974 static int tcpm_pd_build_request(struct tcpm_port
*port
, u32
*rdo
)
3976 unsigned int mv
, ma
, mw
, flags
;
3977 unsigned int max_ma
, max_mw
;
3978 enum pd_pdo_type type
;
3979 u32 pdo
, matching_snk_pdo
;
3980 int src_pdo_index
= 0;
3981 int snk_pdo_index
= 0;
3984 ret
= tcpm_pd_select_pdo(port
, &snk_pdo_index
, &src_pdo_index
);
3988 pdo
= port
->source_caps
[src_pdo_index
];
3989 matching_snk_pdo
= port
->snk_pdo
[snk_pdo_index
];
3990 type
= pdo_type(pdo
);
3993 case PDO_TYPE_FIXED
:
3994 mv
= pdo_fixed_voltage(pdo
);
3998 mv
= pdo_min_voltage(pdo
);
4001 tcpm_log(port
, "Invalid PDO selected!");
4005 /* Select maximum available current within the sink pdo's limit */
4006 if (type
== PDO_TYPE_BATT
) {
4007 mw
= min_power(pdo
, matching_snk_pdo
);
4008 ma
= 1000 * mw
/ mv
;
4010 ma
= min_current(pdo
, matching_snk_pdo
);
4011 mw
= ma
* mv
/ 1000;
4014 flags
= RDO_USB_COMM
| RDO_NO_SUSPEND
;
4016 /* Set mismatch bit if offered power is less than operating power */
4019 if (mw
< port
->operating_snk_mw
) {
4020 flags
|= RDO_CAP_MISMATCH
;
4021 if (type
== PDO_TYPE_BATT
&&
4022 (pdo_max_power(matching_snk_pdo
) > pdo_max_power(pdo
)))
4023 max_mw
= pdo_max_power(matching_snk_pdo
);
4024 else if (pdo_max_current(matching_snk_pdo
) >
4025 pdo_max_current(pdo
))
4026 max_ma
= pdo_max_current(matching_snk_pdo
);
4029 tcpm_log(port
, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
4030 port
->cc_req
, port
->cc1
, port
->cc2
, port
->vbus_source
,
4031 port
->vconn_role
== TYPEC_SOURCE
? "source" : "sink",
4034 if (type
== PDO_TYPE_BATT
) {
4035 *rdo
= RDO_BATT(src_pdo_index
+ 1, mw
, max_mw
, flags
);
4037 tcpm_log(port
, "Requesting PDO %d: %u mV, %u mW%s",
4038 src_pdo_index
, mv
, mw
,
4039 flags
& RDO_CAP_MISMATCH
? " [mismatch]" : "");
4041 *rdo
= RDO_FIXED(src_pdo_index
+ 1, ma
, max_ma
, flags
);
4043 tcpm_log(port
, "Requesting PDO %d: %u mV, %u mA%s",
4044 src_pdo_index
, mv
, ma
,
4045 flags
& RDO_CAP_MISMATCH
? " [mismatch]" : "");
4048 port
->req_current_limit
= ma
;
4049 port
->req_supply_voltage
= mv
;
4054 static int tcpm_pd_send_request(struct tcpm_port
*port
)
4056 struct pd_message msg
;
4060 ret
= tcpm_pd_build_request(port
, &rdo
);
4065 * Relax the threshold as voltage will be adjusted after Accept Message plus tSrcTransition.
4066 * It is safer to modify the threshold here.
4068 tcpm_set_auto_vbus_discharge_threshold(port
, TYPEC_PWR_MODE_USB
, false, 0);
4070 memset(&msg
, 0, sizeof(msg
));
4071 msg
.header
= PD_HEADER_LE(PD_DATA_REQUEST
,
4074 port
->negotiated_rev
,
4075 port
->message_id
, 1);
4076 msg
.payload
[0] = cpu_to_le32(rdo
);
4078 return tcpm_pd_transmit(port
, TCPC_TX_SOP
, &msg
);
4081 static int tcpm_pd_build_pps_request(struct tcpm_port
*port
, u32
*rdo
)
4083 unsigned int out_mv
, op_ma
, op_mw
, max_mv
, max_ma
, flags
;
4084 unsigned int src_pdo_index
;
4086 src_pdo_index
= tcpm_pd_select_pps_apdo(port
);
4090 max_mv
= port
->pps_data
.req_max_volt
;
4091 max_ma
= port
->pps_data
.req_max_curr
;
4092 out_mv
= port
->pps_data
.req_out_volt
;
4093 op_ma
= port
->pps_data
.req_op_curr
;
4095 flags
= RDO_USB_COMM
| RDO_NO_SUSPEND
;
4097 op_mw
= (op_ma
* out_mv
) / 1000;
4098 if (op_mw
< port
->operating_snk_mw
) {
4100 * Try raising current to meet power needs. If that's not enough
4101 * then try upping the voltage. If that's still not enough
4102 * then we've obviously chosen a PPS APDO which really isn't
4103 * suitable so abandon ship.
4105 op_ma
= (port
->operating_snk_mw
* 1000) / out_mv
;
4106 if ((port
->operating_snk_mw
* 1000) % out_mv
)
4108 op_ma
+= RDO_PROG_CURR_MA_STEP
- (op_ma
% RDO_PROG_CURR_MA_STEP
);
4110 if (op_ma
> max_ma
) {
4112 out_mv
= (port
->operating_snk_mw
* 1000) / op_ma
;
4113 if ((port
->operating_snk_mw
* 1000) % op_ma
)
4115 out_mv
+= RDO_PROG_VOLT_MV_STEP
-
4116 (out_mv
% RDO_PROG_VOLT_MV_STEP
);
4118 if (out_mv
> max_mv
) {
4119 tcpm_log(port
, "Invalid PPS APDO selected!");
4125 tcpm_log(port
, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
4126 port
->cc_req
, port
->cc1
, port
->cc2
, port
->vbus_source
,
4127 port
->vconn_role
== TYPEC_SOURCE
? "source" : "sink",
4130 *rdo
= RDO_PROG(src_pdo_index
+ 1, out_mv
, op_ma
, flags
);
4132 tcpm_log(port
, "Requesting APDO %d: %u mV, %u mA",
4133 src_pdo_index
, out_mv
, op_ma
);
4135 port
->pps_data
.req_op_curr
= op_ma
;
4136 port
->pps_data
.req_out_volt
= out_mv
;
4141 static int tcpm_pd_send_pps_request(struct tcpm_port
*port
)
4143 struct pd_message msg
;
4147 ret
= tcpm_pd_build_pps_request(port
, &rdo
);
4151 /* Relax the threshold as voltage will be adjusted right after Accept Message. */
4152 tcpm_set_auto_vbus_discharge_threshold(port
, TYPEC_PWR_MODE_USB
, false, 0);
4154 memset(&msg
, 0, sizeof(msg
));
4155 msg
.header
= PD_HEADER_LE(PD_DATA_REQUEST
,
4158 port
->negotiated_rev
,
4159 port
->message_id
, 1);
4160 msg
.payload
[0] = cpu_to_le32(rdo
);
4162 return tcpm_pd_transmit(port
, TCPC_TX_SOP
, &msg
);
4165 static int tcpm_set_vbus(struct tcpm_port
*port
, bool enable
)
4169 if (enable
&& port
->vbus_charge
)
4172 tcpm_log(port
, "vbus:=%d charge=%d", enable
, port
->vbus_charge
);
4174 ret
= port
->tcpc
->set_vbus(port
->tcpc
, enable
, port
->vbus_charge
);
4178 port
->vbus_source
= enable
;
4182 static int tcpm_set_charge(struct tcpm_port
*port
, bool charge
)
4186 if (charge
&& port
->vbus_source
)
4189 if (charge
!= port
->vbus_charge
) {
4190 tcpm_log(port
, "vbus=%d charge:=%d", port
->vbus_source
, charge
);
4191 ret
= port
->tcpc
->set_vbus(port
->tcpc
, port
->vbus_source
,
4196 port
->vbus_charge
= charge
;
4197 power_supply_changed(port
->psy
);
4201 static bool tcpm_start_toggling(struct tcpm_port
*port
, enum typec_cc_status cc
)
4205 if (!port
->tcpc
->start_toggling
)
4208 tcpm_log_force(port
, "Start toggling");
4209 ret
= port
->tcpc
->start_toggling(port
->tcpc
, port
->port_type
, cc
);
4213 static int tcpm_init_vbus(struct tcpm_port
*port
)
4217 ret
= port
->tcpc
->set_vbus(port
->tcpc
, false, false);
4218 port
->vbus_source
= false;
4219 port
->vbus_charge
= false;
4223 static int tcpm_init_vconn(struct tcpm_port
*port
)
4227 ret
= port
->tcpc
->set_vconn(port
->tcpc
, false);
4228 port
->vconn_role
= TYPEC_SINK
;
4232 static void tcpm_typec_connect(struct tcpm_port
*port
)
4234 if (!port
->connected
) {
4235 /* Make sure we don't report stale identity information */
4236 memset(&port
->partner_ident
, 0, sizeof(port
->partner_ident
));
4237 port
->partner_desc
.usb_pd
= port
->pd_capable
;
4238 if (tcpm_port_is_debug(port
))
4239 port
->partner_desc
.accessory
= TYPEC_ACCESSORY_DEBUG
;
4240 else if (tcpm_port_is_audio(port
))
4241 port
->partner_desc
.accessory
= TYPEC_ACCESSORY_AUDIO
;
4243 port
->partner_desc
.accessory
= TYPEC_ACCESSORY_NONE
;
4244 port
->partner
= typec_register_partner(port
->typec_port
,
4245 &port
->partner_desc
);
4246 port
->connected
= true;
4247 typec_partner_set_usb_power_delivery(port
->partner
, port
->partner_pd
);
4251 static int tcpm_src_attach(struct tcpm_port
*port
)
4253 enum typec_cc_polarity polarity
=
4254 port
->cc2
== TYPEC_CC_RD
? TYPEC_POLARITY_CC2
4255 : TYPEC_POLARITY_CC1
;
4261 ret
= tcpm_set_polarity(port
, polarity
);
4265 tcpm_enable_auto_vbus_discharge(port
, true);
4267 ret
= tcpm_set_roles(port
, true, TYPEC_SOURCE
, tcpm_data_role_for_source(port
));
4271 if (port
->pd_supported
) {
4272 ret
= port
->tcpc
->set_pd_rx(port
->tcpc
, true);
4274 goto out_disable_mux
;
4278 * USB Type-C specification, version 1.2,
4279 * chapter 4.5.2.2.8.1 (Attached.SRC Requirements)
4280 * Enable VCONN only if the non-RD port is set to RA.
4282 if ((polarity
== TYPEC_POLARITY_CC1
&& port
->cc2
== TYPEC_CC_RA
) ||
4283 (polarity
== TYPEC_POLARITY_CC2
&& port
->cc1
== TYPEC_CC_RA
)) {
4284 ret
= tcpm_set_vconn(port
, true);
4286 goto out_disable_pd
;
4289 ret
= tcpm_set_vbus(port
, true);
4291 goto out_disable_vconn
;
4293 port
->pd_capable
= false;
4295 port
->partner
= NULL
;
4297 port
->attached
= true;
4298 port
->send_discover
= true;
4299 port
->send_discover_prime
= false;
4304 tcpm_set_vconn(port
, false);
4306 if (port
->pd_supported
)
4307 port
->tcpc
->set_pd_rx(port
->tcpc
, false);
4309 tcpm_mux_set(port
, TYPEC_STATE_SAFE
, USB_ROLE_NONE
,
4310 TYPEC_ORIENTATION_NONE
);
4314 static void tcpm_typec_disconnect(struct tcpm_port
*port
)
4317 * Unregister plug/cable outside of port->connected because cable can
4318 * be discovered before SRC_READY/SNK_READY states where port->connected
4321 typec_unregister_plug(port
->plug_prime
);
4322 typec_unregister_cable(port
->cable
);
4323 port
->plug_prime
= NULL
;
4325 if (port
->connected
) {
4326 typec_partner_set_usb_power_delivery(port
->partner
, NULL
);
4327 typec_unregister_partner(port
->partner
);
4328 port
->partner
= NULL
;
4329 port
->connected
= false;
4333 static void tcpm_unregister_altmodes(struct tcpm_port
*port
)
4335 struct pd_mode_data
*modep
= &port
->mode_data
;
4336 struct pd_mode_data
*modep_prime
= &port
->mode_data_prime
;
4339 for (i
= 0; i
< modep
->altmodes
; i
++) {
4340 typec_unregister_altmode(port
->partner_altmode
[i
]);
4341 port
->partner_altmode
[i
] = NULL
;
4343 for (i
= 0; i
< modep_prime
->altmodes
; i
++) {
4344 typec_unregister_altmode(port
->plug_prime_altmode
[i
]);
4345 port
->plug_prime_altmode
[i
] = NULL
;
4348 memset(modep
, 0, sizeof(*modep
));
4349 memset(modep_prime
, 0, sizeof(*modep_prime
));
4352 static void tcpm_set_partner_usb_comm_capable(struct tcpm_port
*port
, bool capable
)
4354 tcpm_log(port
, "Setting usb_comm capable %s", capable
? "true" : "false");
4356 if (port
->tcpc
->set_partner_usb_comm_capable
)
4357 port
->tcpc
->set_partner_usb_comm_capable(port
->tcpc
, capable
);
4360 static void tcpm_reset_port(struct tcpm_port
*port
)
4362 tcpm_enable_auto_vbus_discharge(port
, false);
4363 port
->in_ams
= false;
4364 port
->ams
= NONE_AMS
;
4365 port
->vdm_sm_running
= false;
4366 tcpm_unregister_altmodes(port
);
4367 tcpm_typec_disconnect(port
);
4368 port
->attached
= false;
4369 port
->pd_capable
= false;
4370 port
->pps_data
.supported
= false;
4371 tcpm_set_partner_usb_comm_capable(port
, false);
4374 * First Rx ID should be 0; set this to a sentinel of -1 so that
4375 * we can check tcpm_pd_rx_handler() if we had seen it before.
4377 port
->rx_msgid
= -1;
4378 port
->rx_msgid_prime
= -1;
4380 port
->tcpc
->set_pd_rx(port
->tcpc
, false);
4381 tcpm_init_vbus(port
); /* also disables charging */
4382 tcpm_init_vconn(port
);
4383 tcpm_set_current_limit(port
, 0, 0);
4384 tcpm_set_polarity(port
, TYPEC_POLARITY_CC1
);
4385 tcpm_mux_set(port
, TYPEC_STATE_SAFE
, USB_ROLE_NONE
,
4386 TYPEC_ORIENTATION_NONE
);
4387 tcpm_set_attached_state(port
, false);
4388 port
->try_src_count
= 0;
4389 port
->try_snk_count
= 0;
4390 port
->usb_type
= POWER_SUPPLY_USB_TYPE_C
;
4391 power_supply_changed(port
->psy
);
4392 port
->nr_sink_caps
= 0;
4393 port
->sink_cap_done
= false;
4394 if (port
->tcpc
->enable_frs
)
4395 port
->tcpc
->enable_frs(port
->tcpc
, false);
4397 usb_power_delivery_unregister_capabilities(port
->partner_sink_caps
);
4398 port
->partner_sink_caps
= NULL
;
4399 usb_power_delivery_unregister_capabilities(port
->partner_source_caps
);
4400 port
->partner_source_caps
= NULL
;
4401 usb_power_delivery_unregister(port
->partner_pd
);
4402 port
->partner_pd
= NULL
;
4405 static void tcpm_detach(struct tcpm_port
*port
)
4407 if (tcpm_port_is_disconnected(port
))
4408 port
->hard_reset_count
= 0;
4410 if (!port
->attached
)
4413 if (port
->tcpc
->set_bist_data
) {
4414 tcpm_log(port
, "disable BIST MODE TESTDATA");
4415 port
->tcpc
->set_bist_data(port
->tcpc
, false);
4418 tcpm_reset_port(port
);
4421 static void tcpm_src_detach(struct tcpm_port
*port
)
4426 static int tcpm_snk_attach(struct tcpm_port
*port
)
4433 ret
= tcpm_set_polarity(port
, port
->cc2
!= TYPEC_CC_OPEN
?
4434 TYPEC_POLARITY_CC2
: TYPEC_POLARITY_CC1
);
4438 tcpm_enable_auto_vbus_discharge(port
, true);
4440 ret
= tcpm_set_roles(port
, true, TYPEC_SINK
, tcpm_data_role_for_sink(port
));
4444 port
->pd_capable
= false;
4446 port
->partner
= NULL
;
4448 port
->attached
= true;
4449 port
->send_discover
= true;
4450 port
->send_discover_prime
= false;
4455 static void tcpm_snk_detach(struct tcpm_port
*port
)
4460 static int tcpm_acc_attach(struct tcpm_port
*port
)
4467 ret
= tcpm_set_roles(port
, true, TYPEC_SOURCE
,
4468 tcpm_data_role_for_source(port
));
4472 port
->partner
= NULL
;
4474 tcpm_typec_connect(port
);
4476 port
->attached
= true;
4481 static void tcpm_acc_detach(struct tcpm_port
*port
)
4486 static inline enum tcpm_state
hard_reset_state(struct tcpm_port
*port
)
4488 if (port
->hard_reset_count
< PD_N_HARD_RESET_COUNT
)
4489 return HARD_RESET_SEND
;
4490 if (port
->pd_capable
)
4491 return ERROR_RECOVERY
;
4492 if (port
->pwr_role
== TYPEC_SOURCE
)
4493 return SRC_UNATTACHED
;
4494 if (port
->state
== SNK_WAIT_CAPABILITIES
)
4496 return SNK_UNATTACHED
;
4499 static inline enum tcpm_state
unattached_state(struct tcpm_port
*port
)
4501 if (port
->port_type
== TYPEC_PORT_DRP
) {
4502 if (port
->pwr_role
== TYPEC_SOURCE
)
4503 return SRC_UNATTACHED
;
4505 return SNK_UNATTACHED
;
4506 } else if (port
->port_type
== TYPEC_PORT_SRC
) {
4507 return SRC_UNATTACHED
;
4510 return SNK_UNATTACHED
;
4513 static void tcpm_swap_complete(struct tcpm_port
*port
, int result
)
4515 if (port
->swap_pending
) {
4516 port
->swap_status
= result
;
4517 port
->swap_pending
= false;
4518 port
->non_pd_role_swap
= false;
4519 complete(&port
->swap_complete
);
4523 static enum typec_pwr_opmode
tcpm_get_pwr_opmode(enum typec_cc_status cc
)
4526 case TYPEC_CC_RP_1_5
:
4527 return TYPEC_PWR_MODE_1_5A
;
4528 case TYPEC_CC_RP_3_0
:
4529 return TYPEC_PWR_MODE_3_0A
;
4530 case TYPEC_CC_RP_DEF
:
4532 return TYPEC_PWR_MODE_USB
;
4536 static enum typec_cc_status
tcpm_pwr_opmode_to_rp(enum typec_pwr_opmode opmode
)
4539 case TYPEC_PWR_MODE_USB
:
4540 return TYPEC_CC_RP_DEF
;
4541 case TYPEC_PWR_MODE_1_5A
:
4542 return TYPEC_CC_RP_1_5
;
4543 case TYPEC_PWR_MODE_3_0A
:
4544 case TYPEC_PWR_MODE_PD
:
4546 return TYPEC_CC_RP_3_0
;
4550 static void tcpm_set_initial_svdm_version(struct tcpm_port
*port
)
4552 switch (port
->negotiated_rev
) {
4556 * 6.4.4.2.3 Structured VDM Version
4557 * 2.0 states "At this time, there is only one version (1.0) defined.
4558 * This field Shall be set to zero to indicate Version 1.0."
4559 * 3.0 states "This field Shall be set to 01b to indicate Version 2.0."
4560 * To ensure that we follow the Power Delivery revision we are currently
4561 * operating on, downgrade the SVDM version to the highest one supported
4562 * by the Power Delivery revision.
4565 typec_partner_set_svdm_version(port
->partner
, SVDM_VER_1_0
);
4568 typec_partner_set_svdm_version(port
->partner
, SVDM_VER_1_0
);
4573 static void run_state_machine(struct tcpm_port
*port
)
4576 enum typec_pwr_opmode opmode
;
4578 enum tcpm_state upcoming_state
;
4580 if (port
->tcpc
->check_contaminant
&& port
->state
!= CHECK_CONTAMINANT
)
4581 port
->potential_contaminant
= ((port
->enter_state
== SRC_ATTACH_WAIT
&&
4582 port
->state
== SRC_UNATTACHED
) ||
4583 (port
->enter_state
== SNK_ATTACH_WAIT
&&
4584 port
->state
== SNK_UNATTACHED
) ||
4585 (port
->enter_state
== SNK_DEBOUNCED
&&
4586 port
->state
== SNK_UNATTACHED
));
4588 port
->enter_state
= port
->state
;
4589 switch (port
->state
) {
4592 case CHECK_CONTAMINANT
:
4593 port
->tcpc
->check_contaminant(port
->tcpc
);
4596 case SRC_UNATTACHED
:
4597 if (!port
->non_pd_role_swap
)
4598 tcpm_swap_complete(port
, -ENOTCONN
);
4599 tcpm_src_detach(port
);
4600 if (port
->potential_contaminant
) {
4601 tcpm_set_state(port
, CHECK_CONTAMINANT
, 0);
4604 if (tcpm_start_toggling(port
, tcpm_rp_cc(port
))) {
4605 tcpm_set_state(port
, TOGGLING
, 0);
4608 tcpm_set_cc(port
, tcpm_rp_cc(port
));
4609 if (port
->port_type
== TYPEC_PORT_DRP
)
4610 tcpm_set_state(port
, SNK_UNATTACHED
, PD_T_DRP_SNK
);
4612 case SRC_ATTACH_WAIT
:
4613 if (tcpm_port_is_debug(port
))
4614 tcpm_set_state(port
, DEBUG_ACC_ATTACHED
,
4616 else if (tcpm_port_is_audio(port
))
4617 tcpm_set_state(port
, AUDIO_ACC_ATTACHED
,
4619 else if (tcpm_port_is_source(port
) && port
->vbus_vsafe0v
)
4620 tcpm_set_state(port
,
4621 tcpm_try_snk(port
) ? SNK_TRY
4627 port
->try_snk_count
++;
4630 * - Do not drive vconn or vbus
4631 * - Terminate CC pins (both) to Rd
4633 * - Wait for tDRPTry (PD_T_DRP_TRY).
4634 * Until then, ignore any state changes.
4636 tcpm_set_cc(port
, TYPEC_CC_RD
);
4637 tcpm_set_state(port
, SNK_TRY_WAIT
, PD_T_DRP_TRY
);
4640 if (tcpm_port_is_sink(port
)) {
4641 tcpm_set_state(port
, SNK_TRY_WAIT_DEBOUNCE
, 0);
4643 tcpm_set_state(port
, SRC_TRYWAIT
, 0);
4647 case SNK_TRY_WAIT_DEBOUNCE
:
4648 tcpm_set_state(port
, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS
,
4649 PD_T_TRY_CC_DEBOUNCE
);
4651 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS
:
4652 if (port
->vbus_present
&& tcpm_port_is_sink(port
))
4653 tcpm_set_state(port
, SNK_ATTACHED
, 0);
4658 tcpm_set_cc(port
, tcpm_rp_cc(port
));
4659 if (port
->max_wait
== 0) {
4660 port
->max_wait
= jiffies
+
4661 msecs_to_jiffies(PD_T_DRP_TRY
);
4662 tcpm_set_state(port
, SRC_TRYWAIT_UNATTACHED
,
4665 if (time_is_after_jiffies(port
->max_wait
))
4666 tcpm_set_state(port
, SRC_TRYWAIT_UNATTACHED
,
4667 jiffies_to_msecs(port
->max_wait
-
4670 tcpm_set_state(port
, SNK_UNATTACHED
, 0);
4673 case SRC_TRYWAIT_DEBOUNCE
:
4674 tcpm_set_state(port
, SRC_ATTACHED
, PD_T_CC_DEBOUNCE
);
4676 case SRC_TRYWAIT_UNATTACHED
:
4677 tcpm_set_state(port
, SNK_UNATTACHED
, 0);
4681 ret
= tcpm_src_attach(port
);
4682 tcpm_set_state(port
, SRC_UNATTACHED
,
4683 ret
< 0 ? 0 : PD_T_PS_SOURCE_ON
);
4686 opmode
= tcpm_get_pwr_opmode(tcpm_rp_cc(port
));
4687 typec_set_pwr_opmode(port
->typec_port
, opmode
);
4688 port
->pwr_opmode
= TYPEC_PWR_MODE_USB
;
4689 port
->caps_count
= 0;
4690 port
->negotiated_rev
= PD_MAX_REV
;
4691 port
->negotiated_rev_prime
= PD_MAX_REV
;
4692 port
->message_id
= 0;
4693 port
->message_id_prime
= 0;
4694 port
->rx_msgid
= -1;
4695 port
->rx_msgid_prime
= -1;
4696 port
->explicit_contract
= false;
4697 /* SNK -> SRC POWER/FAST_ROLE_SWAP finished */
4698 if (port
->ams
== POWER_ROLE_SWAP
||
4699 port
->ams
== FAST_ROLE_SWAP
)
4700 tcpm_ams_finish(port
);
4701 if (!port
->pd_supported
) {
4702 tcpm_set_state(port
, SRC_READY
, 0);
4705 port
->upcoming_state
= SRC_SEND_CAPABILITIES
;
4706 tcpm_ams_start(port
, POWER_NEGOTIATION
);
4708 case SRC_SEND_CAPABILITIES
:
4710 if (port
->caps_count
> PD_N_CAPS_COUNT
) {
4711 tcpm_set_state(port
, SRC_READY
, 0);
4714 ret
= tcpm_pd_send_source_caps(port
);
4716 if (tcpm_can_communicate_sop_prime(port
) &&
4717 IS_ERR_OR_NULL(port
->cable
))
4718 tcpm_set_state(port
, SRC_VDM_IDENTITY_REQUEST
, 0);
4720 tcpm_set_state(port
, SRC_SEND_CAPABILITIES
,
4721 PD_T_SEND_SOURCE_CAP
);
4724 * Per standard, we should clear the reset counter here.
4725 * However, that can result in state machine hang-ups.
4726 * Reset it only in READY state to improve stability.
4728 /* port->hard_reset_count = 0; */
4729 port
->caps_count
= 0;
4730 port
->pd_capable
= true;
4731 tcpm_set_state_cond(port
, SRC_SEND_CAPABILITIES_TIMEOUT
,
4732 PD_T_SEND_SOURCE_CAP
);
4735 case SRC_SEND_CAPABILITIES_TIMEOUT
:
4737 * Error recovery for a PD_DATA_SOURCE_CAP reply timeout.
4739 * PD 2.0 sinks are supposed to accept src-capabilities with a
4740 * 3.0 header and simply ignore any src PDOs which the sink does
4741 * not understand such as PPS but some 2.0 sinks instead ignore
4742 * the entire PD_DATA_SOURCE_CAP message, causing contract
4743 * negotiation to fail.
4745 * After PD_N_HARD_RESET_COUNT hard-reset attempts, we try
4746 * sending src-capabilities with a lower PD revision to
4747 * make these broken sinks work.
4749 if (port
->hard_reset_count
< PD_N_HARD_RESET_COUNT
) {
4750 tcpm_set_state(port
, HARD_RESET_SEND
, 0);
4751 } else if (port
->negotiated_rev
> PD_REV20
) {
4752 port
->negotiated_rev
--;
4753 port
->hard_reset_count
= 0;
4754 tcpm_set_state(port
, SRC_SEND_CAPABILITIES
, 0);
4756 tcpm_set_state(port
, hard_reset_state(port
), 0);
4759 case SRC_NEGOTIATE_CAPABILITIES
:
4760 ret
= tcpm_pd_check_request(port
);
4762 tcpm_pd_send_control(port
, PD_CTRL_REJECT
, TCPC_TX_SOP
);
4763 if (!port
->explicit_contract
) {
4764 tcpm_set_state(port
,
4765 SRC_WAIT_NEW_CAPABILITIES
, 0);
4767 tcpm_set_state(port
, SRC_READY
, 0);
4770 tcpm_pd_send_control(port
, PD_CTRL_ACCEPT
, TCPC_TX_SOP
);
4771 tcpm_set_partner_usb_comm_capable(port
,
4772 !!(port
->sink_request
& RDO_USB_COMM
));
4773 tcpm_set_state(port
, SRC_TRANSITION_SUPPLY
,
4774 PD_T_SRC_TRANSITION
);
4777 case SRC_TRANSITION_SUPPLY
:
4778 /* XXX: regulator_set_voltage(vbus, ...) */
4779 tcpm_pd_send_control(port
, PD_CTRL_PS_RDY
, TCPC_TX_SOP
);
4780 port
->explicit_contract
= true;
4781 typec_set_pwr_opmode(port
->typec_port
, TYPEC_PWR_MODE_PD
);
4782 port
->pwr_opmode
= TYPEC_PWR_MODE_PD
;
4783 tcpm_set_state_cond(port
, SRC_READY
, 0);
4787 port
->hard_reset_count
= 0;
4789 port
->try_src_count
= 0;
4791 tcpm_swap_complete(port
, 0);
4792 tcpm_typec_connect(port
);
4794 if (port
->ams
!= NONE_AMS
)
4795 tcpm_ams_finish(port
);
4796 if (port
->next_ams
!= NONE_AMS
) {
4797 port
->ams
= port
->next_ams
;
4798 port
->next_ams
= NONE_AMS
;
4802 * If previous AMS is interrupted, switch to the upcoming
4805 if (port
->upcoming_state
!= INVALID_STATE
) {
4806 upcoming_state
= port
->upcoming_state
;
4807 port
->upcoming_state
= INVALID_STATE
;
4808 tcpm_set_state(port
, upcoming_state
, 0);
4813 * 6.4.4.3.1 Discover Identity
4814 * "The Discover Identity Command Shall only be sent to SOP when there is an
4815 * Explicit Contract."
4817 * Discover Identity on SOP' should be discovered prior to the
4818 * ready state, but if done after a Vconn Swap following Discover
4819 * Identity on SOP then the discovery process can be run here
4822 if (port
->explicit_contract
) {
4823 if (port
->send_discover_prime
) {
4824 port
->tx_sop_type
= TCPC_TX_SOP_PRIME
;
4826 port
->tx_sop_type
= TCPC_TX_SOP
;
4827 tcpm_set_initial_svdm_version(port
);
4829 mod_send_discover_delayed_work(port
, 0);
4831 port
->send_discover
= false;
4832 port
->send_discover_prime
= false;
4837 * Sending ping messages is not necessary if
4838 * - the source operates at vSafe5V
4840 * - The system is not operating in PD mode
4842 * - Both partners are connected using a Type-C connector
4844 * There is no actual need to send PD messages since the local
4845 * port type-c and the spec does not clearly say whether PD is
4846 * possible when type-c is connected to Type-A/B
4849 case SRC_WAIT_NEW_CAPABILITIES
:
4850 /* Nothing to do... */
4854 case SNK_UNATTACHED
:
4855 if (!port
->non_pd_role_swap
)
4856 tcpm_swap_complete(port
, -ENOTCONN
);
4857 tcpm_pps_complete(port
, -ENOTCONN
);
4858 tcpm_snk_detach(port
);
4859 if (port
->potential_contaminant
) {
4860 tcpm_set_state(port
, CHECK_CONTAMINANT
, 0);
4863 if (tcpm_start_toggling(port
, TYPEC_CC_RD
)) {
4864 tcpm_set_state(port
, TOGGLING
, 0);
4867 tcpm_set_cc(port
, TYPEC_CC_RD
);
4868 if (port
->port_type
== TYPEC_PORT_DRP
)
4869 tcpm_set_state(port
, SRC_UNATTACHED
, PD_T_DRP_SRC
);
4871 case SNK_ATTACH_WAIT
:
4872 if ((port
->cc1
== TYPEC_CC_OPEN
&&
4873 port
->cc2
!= TYPEC_CC_OPEN
) ||
4874 (port
->cc1
!= TYPEC_CC_OPEN
&&
4875 port
->cc2
== TYPEC_CC_OPEN
))
4876 tcpm_set_state(port
, SNK_DEBOUNCED
,
4878 else if (tcpm_port_is_disconnected(port
))
4879 tcpm_set_state(port
, SNK_UNATTACHED
,
4883 if (tcpm_port_is_disconnected(port
))
4884 tcpm_set_state(port
, SNK_UNATTACHED
,
4886 else if (port
->vbus_present
)
4887 tcpm_set_state(port
,
4888 tcpm_try_src(port
) ? SRC_TRY
4893 port
->try_src_count
++;
4894 tcpm_set_cc(port
, tcpm_rp_cc(port
));
4896 tcpm_set_state(port
, SRC_TRY_WAIT
, 0);
4899 if (port
->max_wait
== 0) {
4900 port
->max_wait
= jiffies
+
4901 msecs_to_jiffies(PD_T_DRP_TRY
);
4902 msecs
= PD_T_DRP_TRY
;
4904 if (time_is_after_jiffies(port
->max_wait
))
4905 msecs
= jiffies_to_msecs(port
->max_wait
-
4910 tcpm_set_state(port
, SNK_TRYWAIT
, msecs
);
4912 case SRC_TRY_DEBOUNCE
:
4913 tcpm_set_state(port
, SRC_ATTACHED
, PD_T_PD_DEBOUNCE
);
4916 tcpm_set_cc(port
, TYPEC_CC_RD
);
4917 tcpm_set_state(port
, SNK_TRYWAIT_VBUS
, PD_T_CC_DEBOUNCE
);
4919 case SNK_TRYWAIT_VBUS
:
4921 * TCPM stays in this state indefinitely until VBUS
4922 * is detected as long as Rp is not detected for
4923 * more than a time period of tPDDebounce.
4925 if (port
->vbus_present
&& tcpm_port_is_sink(port
)) {
4926 tcpm_set_state(port
, SNK_ATTACHED
, 0);
4929 if (!tcpm_port_is_sink(port
))
4930 tcpm_set_state(port
, SNK_TRYWAIT_DEBOUNCE
, 0);
4932 case SNK_TRYWAIT_DEBOUNCE
:
4933 tcpm_set_state(port
, SNK_UNATTACHED
, PD_T_PD_DEBOUNCE
);
4936 ret
= tcpm_snk_attach(port
);
4938 tcpm_set_state(port
, SNK_UNATTACHED
, 0);
4940 tcpm_set_state(port
, SNK_STARTUP
, 0);
4943 opmode
= tcpm_get_pwr_opmode(port
->polarity
?
4944 port
->cc2
: port
->cc1
);
4945 typec_set_pwr_opmode(port
->typec_port
, opmode
);
4946 port
->pwr_opmode
= TYPEC_PWR_MODE_USB
;
4947 port
->negotiated_rev
= PD_MAX_REV
;
4948 port
->negotiated_rev_prime
= PD_MAX_REV
;
4949 port
->message_id
= 0;
4950 port
->message_id_prime
= 0;
4951 port
->rx_msgid
= -1;
4952 port
->rx_msgid_prime
= -1;
4953 port
->explicit_contract
= false;
4955 if (port
->ams
== POWER_ROLE_SWAP
||
4956 port
->ams
== FAST_ROLE_SWAP
)
4957 /* SRC -> SNK POWER/FAST_ROLE_SWAP finished */
4958 tcpm_ams_finish(port
);
4960 tcpm_set_state(port
, SNK_DISCOVERY
, 0);
4963 if (port
->vbus_present
) {
4964 u32 current_lim
= tcpm_get_current_limit(port
);
4966 if (port
->slow_charger_loop
&& (current_lim
> PD_P_SNK_STDBY_MW
/ 5))
4967 current_lim
= PD_P_SNK_STDBY_MW
/ 5;
4968 tcpm_set_current_limit(port
, current_lim
, 5000);
4969 /* Not sink vbus if operational current is 0mA */
4970 tcpm_set_charge(port
, !port
->pd_supported
||
4971 pdo_max_current(port
->snk_pdo
[0]));
4973 if (!port
->pd_supported
)
4974 tcpm_set_state(port
, SNK_READY
, 0);
4976 tcpm_set_state(port
, SNK_WAIT_CAPABILITIES
, 0);
4980 * For DRP, timeouts differ. Also, handling is supposed to be
4981 * different and much more complex (dead battery detection;
4982 * see USB power delivery specification, section 8.3.3.6.1.5.1).
4984 tcpm_set_state(port
, hard_reset_state(port
),
4985 port
->port_type
== TYPEC_PORT_DRP
?
4986 PD_T_DB_DETECT
: PD_T_NO_RESPONSE
);
4988 case SNK_DISCOVERY_DEBOUNCE
:
4989 tcpm_set_state(port
, SNK_DISCOVERY_DEBOUNCE_DONE
,
4992 case SNK_DISCOVERY_DEBOUNCE_DONE
:
4993 if (!tcpm_port_is_disconnected(port
) &&
4994 tcpm_port_is_sink(port
) &&
4995 ktime_after(port
->delayed_runtime
, ktime_get())) {
4996 tcpm_set_state(port
, SNK_DISCOVERY
,
4997 ktime_to_ms(ktime_sub(port
->delayed_runtime
, ktime_get())));
5000 tcpm_set_state(port
, unattached_state(port
), 0);
5002 case SNK_WAIT_CAPABILITIES
:
5003 ret
= port
->tcpc
->set_pd_rx(port
->tcpc
, true);
5005 tcpm_set_state(port
, SNK_READY
, 0);
5009 * If VBUS has never been low, and we time out waiting
5010 * for source cap, try a soft reset first, in case we
5011 * were already in a stable contract before this boot.
5012 * Do this only once.
5014 if (port
->vbus_never_low
) {
5015 port
->vbus_never_low
= false;
5016 tcpm_set_state(port
, SNK_SOFT_RESET
,
5017 PD_T_SINK_WAIT_CAP
);
5019 tcpm_set_state(port
, hard_reset_state(port
),
5020 PD_T_SINK_WAIT_CAP
);
5023 case SNK_NEGOTIATE_CAPABILITIES
:
5024 port
->pd_capable
= true;
5025 tcpm_set_partner_usb_comm_capable(port
,
5026 !!(port
->source_caps
[0] & PDO_FIXED_USB_COMM
));
5027 port
->hard_reset_count
= 0;
5028 ret
= tcpm_pd_send_request(port
);
5030 /* Restore back to the original state */
5031 tcpm_set_auto_vbus_discharge_threshold(port
, TYPEC_PWR_MODE_PD
,
5032 port
->pps_data
.active
,
5033 port
->supply_voltage
);
5034 /* Let the Source send capabilities again. */
5035 tcpm_set_state(port
, SNK_WAIT_CAPABILITIES
, 0);
5037 tcpm_set_state_cond(port
, hard_reset_state(port
),
5038 PD_T_SENDER_RESPONSE
);
5041 case SNK_NEGOTIATE_PPS_CAPABILITIES
:
5042 ret
= tcpm_pd_send_pps_request(port
);
5044 /* Restore back to the original state */
5045 tcpm_set_auto_vbus_discharge_threshold(port
, TYPEC_PWR_MODE_PD
,
5046 port
->pps_data
.active
,
5047 port
->supply_voltage
);
5048 port
->pps_status
= ret
;
5050 * If this was called due to updates to sink
5051 * capabilities, and pps is no longer valid, we should
5052 * safely fall back to a standard PDO.
5054 if (port
->update_sink_caps
)
5055 tcpm_set_state(port
, SNK_NEGOTIATE_CAPABILITIES
, 0);
5057 tcpm_set_state(port
, SNK_READY
, 0);
5059 tcpm_set_state_cond(port
, hard_reset_state(port
),
5060 PD_T_SENDER_RESPONSE
);
5063 case SNK_TRANSITION_SINK
:
5064 /* From the USB PD spec:
5065 * "The Sink Shall transition to Sink Standby before a positive or
5066 * negative voltage transition of VBUS. During Sink Standby
5067 * the Sink Shall reduce its power draw to pSnkStdby."
5069 * This is not applicable to PPS though as the port can continue
5070 * to draw negotiated power without switching to standby.
5072 if (port
->supply_voltage
!= port
->req_supply_voltage
&& !port
->pps_data
.active
&&
5073 port
->current_limit
* port
->supply_voltage
/ 1000 > PD_P_SNK_STDBY_MW
) {
5074 u32 stdby_ma
= PD_P_SNK_STDBY_MW
* 1000 / port
->supply_voltage
;
5076 tcpm_log(port
, "Setting standby current %u mV @ %u mA",
5077 port
->supply_voltage
, stdby_ma
);
5078 tcpm_set_current_limit(port
, stdby_ma
, port
->supply_voltage
);
5081 case SNK_TRANSITION_SINK_VBUS
:
5082 tcpm_set_state(port
, hard_reset_state(port
),
5083 PD_T_PS_TRANSITION
);
5086 port
->try_snk_count
= 0;
5087 port
->update_sink_caps
= false;
5088 if (port
->explicit_contract
) {
5089 typec_set_pwr_opmode(port
->typec_port
,
5091 port
->pwr_opmode
= TYPEC_PWR_MODE_PD
;
5094 if (!port
->pd_capable
&& port
->slow_charger_loop
)
5095 tcpm_set_current_limit(port
, tcpm_get_current_limit(port
), 5000);
5096 tcpm_swap_complete(port
, 0);
5097 tcpm_typec_connect(port
);
5098 if (port
->pd_capable
&& port
->source_caps
[0] & PDO_FIXED_DUAL_ROLE
)
5099 mod_enable_frs_delayed_work(port
, 0);
5100 tcpm_pps_complete(port
, port
->pps_status
);
5102 if (port
->ams
!= NONE_AMS
)
5103 tcpm_ams_finish(port
);
5104 if (port
->next_ams
!= NONE_AMS
) {
5105 port
->ams
= port
->next_ams
;
5106 port
->next_ams
= NONE_AMS
;
5110 * If previous AMS is interrupted, switch to the upcoming
5113 if (port
->upcoming_state
!= INVALID_STATE
) {
5114 upcoming_state
= port
->upcoming_state
;
5115 port
->upcoming_state
= INVALID_STATE
;
5116 tcpm_set_state(port
, upcoming_state
, 0);
5121 * 6.4.4.3.1 Discover Identity
5122 * "The Discover Identity Command Shall only be sent to SOP when there is an
5123 * Explicit Contract."
5125 * Discover Identity on SOP' should be discovered prior to the
5126 * ready state, but if done after a Vconn Swap following Discover
5127 * Identity on SOP then the discovery process can be run here
5130 if (port
->explicit_contract
) {
5131 if (port
->send_discover_prime
) {
5132 port
->tx_sop_type
= TCPC_TX_SOP_PRIME
;
5134 port
->tx_sop_type
= TCPC_TX_SOP
;
5135 tcpm_set_initial_svdm_version(port
);
5137 mod_send_discover_delayed_work(port
, 0);
5139 port
->send_discover
= false;
5140 port
->send_discover_prime
= false;
5143 power_supply_changed(port
->psy
);
5146 /* Accessory states */
5147 case ACC_UNATTACHED
:
5148 tcpm_acc_detach(port
);
5149 tcpm_set_state(port
, SRC_UNATTACHED
, 0);
5151 case DEBUG_ACC_ATTACHED
:
5152 case AUDIO_ACC_ATTACHED
:
5153 ret
= tcpm_acc_attach(port
);
5155 tcpm_set_state(port
, ACC_UNATTACHED
, 0);
5157 case AUDIO_ACC_DEBOUNCE
:
5158 tcpm_set_state(port
, ACC_UNATTACHED
, PD_T_CC_DEBOUNCE
);
5161 /* Hard_Reset states */
5162 case HARD_RESET_SEND
:
5163 if (port
->ams
!= NONE_AMS
)
5164 tcpm_ams_finish(port
);
5166 * State machine will be directed to HARD_RESET_START,
5167 * thus set upcoming_state to INVALID_STATE.
5169 port
->upcoming_state
= INVALID_STATE
;
5170 tcpm_ams_start(port
, HARD_RESET
);
5172 case HARD_RESET_START
:
5173 port
->sink_cap_done
= false;
5174 if (port
->tcpc
->enable_frs
)
5175 port
->tcpc
->enable_frs(port
->tcpc
, false);
5176 port
->hard_reset_count
++;
5177 port
->tcpc
->set_pd_rx(port
->tcpc
, false);
5178 tcpm_unregister_altmodes(port
);
5179 port
->nr_sink_caps
= 0;
5180 port
->send_discover
= true;
5181 port
->send_discover_prime
= false;
5182 if (port
->pwr_role
== TYPEC_SOURCE
)
5183 tcpm_set_state(port
, SRC_HARD_RESET_VBUS_OFF
,
5184 PD_T_PS_HARD_RESET
);
5186 tcpm_set_state(port
, SNK_HARD_RESET_SINK_OFF
, 0);
5188 case SRC_HARD_RESET_VBUS_OFF
:
5190 * 7.1.5 Response to Hard Resets
5191 * Hard Reset Signaling indicates a communication failure has occurred and the
5192 * Source Shall stop driving VCONN, Shall remove Rp from the VCONN pin and Shall
5193 * drive VBUS to vSafe0V as shown in Figure 7-9.
5195 tcpm_set_vconn(port
, false);
5196 tcpm_set_vbus(port
, false);
5197 tcpm_set_roles(port
, port
->self_powered
, TYPEC_SOURCE
,
5198 tcpm_data_role_for_source(port
));
5200 * If tcpc fails to notify vbus off, TCPM will wait for PD_T_SAFE_0V +
5201 * PD_T_SRC_RECOVER before turning vbus back on.
5202 * From Table 7-12 Sequence Description for a Source Initiated Hard Reset:
5203 * 4. Policy Engine waits tPSHardReset after sending Hard Reset Signaling and then
5204 * tells the Device Policy Manager to instruct the power supply to perform a
5205 * Hard Reset. The transition to vSafe0V Shall occur within tSafe0V (t2).
5206 * 5. After tSrcRecover the Source applies power to VBUS in an attempt to
5207 * re-establish communication with the Sink and resume USB Default Operation.
5208 * The transition to vSafe5V Shall occur within tSrcTurnOn(t4).
5210 tcpm_set_state(port
, SRC_HARD_RESET_VBUS_ON
, PD_T_SAFE_0V
+ PD_T_SRC_RECOVER
);
5212 case SRC_HARD_RESET_VBUS_ON
:
5213 tcpm_set_vconn(port
, true);
5214 tcpm_set_vbus(port
, true);
5215 if (port
->ams
== HARD_RESET
)
5216 tcpm_ams_finish(port
);
5217 if (port
->pd_supported
)
5218 port
->tcpc
->set_pd_rx(port
->tcpc
, true);
5219 tcpm_set_attached_state(port
, true);
5220 tcpm_set_state(port
, SRC_UNATTACHED
, PD_T_PS_SOURCE_ON
);
5222 case SNK_HARD_RESET_SINK_OFF
:
5223 /* Do not discharge/disconnect during hard reseet */
5224 tcpm_set_auto_vbus_discharge_threshold(port
, TYPEC_PWR_MODE_USB
, false, 0);
5225 memset(&port
->pps_data
, 0, sizeof(port
->pps_data
));
5226 tcpm_set_vconn(port
, false);
5227 if (port
->pd_capable
)
5228 tcpm_set_charge(port
, false);
5229 tcpm_set_roles(port
, port
->self_powered
, TYPEC_SINK
,
5230 tcpm_data_role_for_sink(port
));
5232 * VBUS may or may not toggle, depending on the adapter.
5233 * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON
5234 * directly after timeout.
5236 tcpm_set_state(port
, SNK_HARD_RESET_SINK_ON
, PD_T_SAFE_0V
);
5238 case SNK_HARD_RESET_WAIT_VBUS
:
5239 if (port
->ams
== HARD_RESET
)
5240 tcpm_ams_finish(port
);
5241 /* Assume we're disconnected if VBUS doesn't come back. */
5242 tcpm_set_state(port
, SNK_UNATTACHED
,
5243 PD_T_SRC_RECOVER_MAX
+ PD_T_SRC_TURN_ON
);
5245 case SNK_HARD_RESET_SINK_ON
:
5246 /* Note: There is no guarantee that VBUS is on in this state */
5249 * The specification suggests that dual mode ports in sink
5250 * mode should transition to state PE_SRC_Transition_to_default.
5251 * See USB power delivery specification chapter 8.3.3.6.1.3.
5252 * This would mean to
5253 * - turn off VCONN, reset power supply
5254 * - request hardware reset
5256 * - Transition to state PE_Src_Startup
5257 * SNK only ports shall transition to state Snk_Startup
5258 * (see chapter 8.3.3.3.8).
5259 * Similar, dual-mode ports in source mode should transition
5260 * to PE_SNK_Transition_to_default.
5262 if (port
->pd_capable
) {
5263 tcpm_set_current_limit(port
,
5264 tcpm_get_current_limit(port
),
5266 /* Not sink vbus if operational current is 0mA */
5267 tcpm_set_charge(port
, !!pdo_max_current(port
->snk_pdo
[0]));
5269 if (port
->ams
== HARD_RESET
)
5270 tcpm_ams_finish(port
);
5271 tcpm_set_attached_state(port
, true);
5272 tcpm_set_auto_vbus_discharge_threshold(port
, TYPEC_PWR_MODE_USB
, false, VSAFE5V
);
5273 tcpm_set_state(port
, SNK_STARTUP
, 0);
5276 /* Soft_Reset states */
5278 port
->message_id
= 0;
5279 port
->rx_msgid
= -1;
5280 /* remove existing capabilities */
5281 usb_power_delivery_unregister_capabilities(port
->partner_source_caps
);
5282 port
->partner_source_caps
= NULL
;
5283 tcpm_pd_send_control(port
, PD_CTRL_ACCEPT
, TCPC_TX_SOP
);
5284 tcpm_ams_finish(port
);
5285 if (port
->pwr_role
== TYPEC_SOURCE
) {
5286 port
->upcoming_state
= SRC_SEND_CAPABILITIES
;
5287 tcpm_ams_start(port
, POWER_NEGOTIATION
);
5289 tcpm_set_state(port
, SNK_WAIT_CAPABILITIES
, 0);
5292 case SRC_SOFT_RESET_WAIT_SNK_TX
:
5293 case SNK_SOFT_RESET
:
5294 if (port
->ams
!= NONE_AMS
)
5295 tcpm_ams_finish(port
);
5296 port
->upcoming_state
= SOFT_RESET_SEND
;
5297 tcpm_ams_start(port
, SOFT_RESET_AMS
);
5299 case SOFT_RESET_SEND
:
5301 * Power Delivery 3.0 Section 6.3.13
5303 * A Soft_Reset Message Shall be targeted at a specific entity
5304 * depending on the type of SOP* packet used.
5306 if (port
->tx_sop_type
== TCPC_TX_SOP_PRIME
) {
5307 port
->message_id_prime
= 0;
5308 port
->rx_msgid_prime
= -1;
5309 tcpm_pd_send_control(port
, PD_CTRL_SOFT_RESET
, TCPC_TX_SOP_PRIME
);
5310 tcpm_set_state_cond(port
, ready_state(port
), PD_T_SENDER_RESPONSE
);
5312 port
->message_id
= 0;
5313 port
->rx_msgid
= -1;
5314 /* remove existing capabilities */
5315 usb_power_delivery_unregister_capabilities(port
->partner_source_caps
);
5316 port
->partner_source_caps
= NULL
;
5317 if (tcpm_pd_send_control(port
, PD_CTRL_SOFT_RESET
, TCPC_TX_SOP
))
5318 tcpm_set_state_cond(port
, hard_reset_state(port
), 0);
5320 tcpm_set_state_cond(port
, hard_reset_state(port
),
5321 PD_T_SENDER_RESPONSE
);
5325 /* DR_Swap states */
5327 tcpm_pd_send_control(port
, PD_CTRL_DR_SWAP
, TCPC_TX_SOP
);
5328 if (port
->data_role
== TYPEC_DEVICE
|| port
->negotiated_rev
> PD_REV20
) {
5329 port
->send_discover
= true;
5330 port
->send_discover_prime
= false;
5332 tcpm_set_state_cond(port
, DR_SWAP_SEND_TIMEOUT
,
5333 PD_T_SENDER_RESPONSE
);
5335 case DR_SWAP_ACCEPT
:
5336 tcpm_pd_send_control(port
, PD_CTRL_ACCEPT
, TCPC_TX_SOP
);
5337 if (port
->data_role
== TYPEC_DEVICE
|| port
->negotiated_rev
> PD_REV20
) {
5338 port
->send_discover
= true;
5339 port
->send_discover_prime
= false;
5341 tcpm_set_state_cond(port
, DR_SWAP_CHANGE_DR
, 0);
5343 case DR_SWAP_SEND_TIMEOUT
:
5344 tcpm_swap_complete(port
, -ETIMEDOUT
);
5345 port
->send_discover
= false;
5346 port
->send_discover_prime
= false;
5347 tcpm_ams_finish(port
);
5348 tcpm_set_state(port
, ready_state(port
), 0);
5350 case DR_SWAP_CHANGE_DR
:
5351 tcpm_unregister_altmodes(port
);
5352 if (port
->data_role
== TYPEC_HOST
)
5353 tcpm_set_roles(port
, true, port
->pwr_role
,
5356 tcpm_set_roles(port
, true, port
->pwr_role
,
5358 tcpm_ams_finish(port
);
5359 tcpm_set_state(port
, ready_state(port
), 0);
5363 if (tcpm_pd_send_control(port
, PD_CTRL_FR_SWAP
, TCPC_TX_SOP
)) {
5364 tcpm_set_state(port
, ERROR_RECOVERY
, 0);
5367 tcpm_set_state_cond(port
, FR_SWAP_SEND_TIMEOUT
, PD_T_SENDER_RESPONSE
);
5369 case FR_SWAP_SEND_TIMEOUT
:
5370 tcpm_set_state(port
, ERROR_RECOVERY
, 0);
5372 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF
:
5373 tcpm_set_state(port
, ERROR_RECOVERY
, PD_T_PS_SOURCE_OFF
);
5375 case FR_SWAP_SNK_SRC_NEW_SINK_READY
:
5376 if (port
->vbus_source
)
5377 tcpm_set_state(port
, FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED
, 0);
5379 tcpm_set_state(port
, ERROR_RECOVERY
, PD_T_RECEIVER_RESPONSE
);
5381 case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED
:
5382 tcpm_set_pwr_role(port
, TYPEC_SOURCE
);
5383 if (tcpm_pd_send_control(port
, PD_CTRL_PS_RDY
, TCPC_TX_SOP
)) {
5384 tcpm_set_state(port
, ERROR_RECOVERY
, 0);
5387 tcpm_set_cc(port
, tcpm_rp_cc(port
));
5388 tcpm_set_state(port
, SRC_STARTUP
, PD_T_SWAP_SRC_START
);
5391 /* PR_Swap states */
5392 case PR_SWAP_ACCEPT
:
5393 tcpm_pd_send_control(port
, PD_CTRL_ACCEPT
, TCPC_TX_SOP
);
5394 tcpm_set_state(port
, PR_SWAP_START
, 0);
5397 tcpm_pd_send_control(port
, PD_CTRL_PR_SWAP
, TCPC_TX_SOP
);
5398 tcpm_set_state_cond(port
, PR_SWAP_SEND_TIMEOUT
,
5399 PD_T_SENDER_RESPONSE
);
5401 case PR_SWAP_SEND_TIMEOUT
:
5402 tcpm_swap_complete(port
, -ETIMEDOUT
);
5403 tcpm_set_state(port
, ready_state(port
), 0);
5406 tcpm_apply_rc(port
);
5407 if (port
->pwr_role
== TYPEC_SOURCE
)
5408 tcpm_set_state(port
, PR_SWAP_SRC_SNK_TRANSITION_OFF
,
5409 PD_T_SRC_TRANSITION
);
5411 tcpm_set_state(port
, PR_SWAP_SNK_SRC_SINK_OFF
, 0);
5413 case PR_SWAP_SRC_SNK_TRANSITION_OFF
:
5415 * Prevent vbus discharge circuit from turning on during PR_SWAP
5416 * as this is not a disconnect.
5418 tcpm_set_vbus(port
, false);
5419 port
->explicit_contract
= false;
5420 /* allow time for Vbus discharge, must be < tSrcSwapStdby */
5421 tcpm_set_state(port
, PR_SWAP_SRC_SNK_SOURCE_OFF
,
5424 case PR_SWAP_SRC_SNK_SOURCE_OFF
:
5425 tcpm_set_cc(port
, TYPEC_CC_RD
);
5426 /* allow CC debounce */
5427 tcpm_set_state(port
, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED
,
5430 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED
:
5432 * USB-PD standard, 6.2.1.4, Port Power Role:
5433 * "During the Power Role Swap Sequence, for the initial Source
5434 * Port, the Port Power Role field shall be set to Sink in the
5435 * PS_RDY Message indicating that the initial Source’s power
5436 * supply is turned off"
5438 tcpm_set_pwr_role(port
, TYPEC_SINK
);
5439 if (tcpm_pd_send_control(port
, PD_CTRL_PS_RDY
, TCPC_TX_SOP
)) {
5440 tcpm_set_state(port
, ERROR_RECOVERY
, 0);
5443 tcpm_set_state(port
, ERROR_RECOVERY
, PD_T_PS_SOURCE_ON_PRS
);
5445 case PR_SWAP_SRC_SNK_SINK_ON
:
5446 tcpm_enable_auto_vbus_discharge(port
, true);
5447 /* Set the vbus disconnect threshold for implicit contract */
5448 tcpm_set_auto_vbus_discharge_threshold(port
, TYPEC_PWR_MODE_USB
, false, VSAFE5V
);
5449 tcpm_set_state(port
, SNK_STARTUP
, 0);
5451 case PR_SWAP_SNK_SRC_SINK_OFF
:
5452 /* will be source, remove existing capabilities */
5453 usb_power_delivery_unregister_capabilities(port
->partner_source_caps
);
5454 port
->partner_source_caps
= NULL
;
5456 * Prevent vbus discharge circuit from turning on during PR_SWAP
5457 * as this is not a disconnect.
5459 tcpm_set_auto_vbus_discharge_threshold(port
, TYPEC_PWR_MODE_USB
,
5460 port
->pps_data
.active
, 0);
5461 tcpm_set_charge(port
, false);
5462 tcpm_set_state(port
, hard_reset_state(port
),
5463 PD_T_PS_SOURCE_OFF
);
5465 case PR_SWAP_SNK_SRC_SOURCE_ON
:
5466 tcpm_enable_auto_vbus_discharge(port
, true);
5467 tcpm_set_cc(port
, tcpm_rp_cc(port
));
5468 tcpm_set_vbus(port
, true);
5470 * allow time VBUS ramp-up, must be < tNewSrc
5471 * Also, this window overlaps with CC debounce as well.
5472 * So, Wait for the max of two which is PD_T_NEWSRC
5474 tcpm_set_state(port
, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP
,
5477 case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP
:
5479 * USB PD standard, 6.2.1.4:
5480 * "Subsequent Messages initiated by the Policy Engine,
5481 * such as the PS_RDY Message sent to indicate that Vbus
5482 * is ready, will have the Port Power Role field set to
5485 tcpm_set_pwr_role(port
, TYPEC_SOURCE
);
5486 tcpm_pd_send_control(port
, PD_CTRL_PS_RDY
, TCPC_TX_SOP
);
5487 tcpm_set_state(port
, SRC_STARTUP
, PD_T_SWAP_SRC_START
);
5490 case VCONN_SWAP_ACCEPT
:
5491 tcpm_pd_send_control(port
, PD_CTRL_ACCEPT
, TCPC_TX_SOP
);
5492 tcpm_ams_finish(port
);
5493 tcpm_set_state(port
, VCONN_SWAP_START
, 0);
5495 case VCONN_SWAP_SEND
:
5496 tcpm_pd_send_control(port
, PD_CTRL_VCONN_SWAP
, TCPC_TX_SOP
);
5497 tcpm_set_state(port
, VCONN_SWAP_SEND_TIMEOUT
,
5498 PD_T_SENDER_RESPONSE
);
5500 case VCONN_SWAP_SEND_TIMEOUT
:
5501 tcpm_swap_complete(port
, -ETIMEDOUT
);
5502 tcpm_set_state(port
, ready_state(port
), 0);
5504 case VCONN_SWAP_START
:
5505 if (port
->vconn_role
== TYPEC_SOURCE
)
5506 tcpm_set_state(port
, VCONN_SWAP_WAIT_FOR_VCONN
, 0);
5508 tcpm_set_state(port
, VCONN_SWAP_TURN_ON_VCONN
, 0);
5510 case VCONN_SWAP_WAIT_FOR_VCONN
:
5511 tcpm_set_state(port
, hard_reset_state(port
),
5512 PD_T_VCONN_SOURCE_ON
);
5514 case VCONN_SWAP_TURN_ON_VCONN
:
5515 ret
= tcpm_set_vconn(port
, true);
5516 tcpm_pd_send_control(port
, PD_CTRL_PS_RDY
, TCPC_TX_SOP
);
5518 * USB PD 3.0 Section 6.4.4.3.1
5520 * Note that a Cable Plug or VPD will not be ready for PD
5521 * Communication until tVCONNStable after VCONN has been applied
5524 tcpm_set_state(port
, VCONN_SWAP_SEND_SOFT_RESET
,
5527 tcpm_set_state(port
, ready_state(port
), 0);
5529 case VCONN_SWAP_TURN_OFF_VCONN
:
5530 tcpm_set_vconn(port
, false);
5531 tcpm_set_state(port
, ready_state(port
), 0);
5533 case VCONN_SWAP_SEND_SOFT_RESET
:
5534 tcpm_swap_complete(port
, port
->swap_status
);
5535 if (tcpm_can_communicate_sop_prime(port
)) {
5536 port
->tx_sop_type
= TCPC_TX_SOP_PRIME
;
5537 port
->upcoming_state
= SOFT_RESET_SEND
;
5538 tcpm_ams_start(port
, SOFT_RESET_AMS
);
5540 tcpm_set_state(port
, ready_state(port
), 0);
5544 case DR_SWAP_CANCEL
:
5545 case PR_SWAP_CANCEL
:
5546 case VCONN_SWAP_CANCEL
:
5547 tcpm_swap_complete(port
, port
->swap_status
);
5548 if (port
->pwr_role
== TYPEC_SOURCE
)
5549 tcpm_set_state(port
, SRC_READY
, 0);
5551 tcpm_set_state(port
, SNK_READY
, 0);
5553 case FR_SWAP_CANCEL
:
5554 if (port
->pwr_role
== TYPEC_SOURCE
)
5555 tcpm_set_state(port
, SRC_READY
, 0);
5557 tcpm_set_state(port
, SNK_READY
, 0);
5561 switch (BDO_MODE_MASK(port
->bist_request
)) {
5562 case BDO_MODE_CARRIER2
:
5563 tcpm_pd_transmit(port
, TCPC_TX_BIST_MODE_2
, NULL
);
5564 tcpm_set_state(port
, unattached_state(port
),
5565 PD_T_BIST_CONT_MODE
);
5567 case BDO_MODE_TESTDATA
:
5568 if (port
->tcpc
->set_bist_data
) {
5569 tcpm_log(port
, "Enable BIST MODE TESTDATA");
5570 port
->tcpc
->set_bist_data(port
->tcpc
, true);
5577 case GET_STATUS_SEND
:
5578 tcpm_pd_send_control(port
, PD_CTRL_GET_STATUS
, TCPC_TX_SOP
);
5579 tcpm_set_state(port
, GET_STATUS_SEND_TIMEOUT
,
5580 PD_T_SENDER_RESPONSE
);
5582 case GET_STATUS_SEND_TIMEOUT
:
5583 tcpm_set_state(port
, ready_state(port
), 0);
5585 case GET_PPS_STATUS_SEND
:
5586 tcpm_pd_send_control(port
, PD_CTRL_GET_PPS_STATUS
, TCPC_TX_SOP
);
5587 tcpm_set_state(port
, GET_PPS_STATUS_SEND_TIMEOUT
,
5588 PD_T_SENDER_RESPONSE
);
5590 case GET_PPS_STATUS_SEND_TIMEOUT
:
5591 tcpm_set_state(port
, ready_state(port
), 0);
5594 tcpm_pd_send_control(port
, PD_CTRL_GET_SINK_CAP
, TCPC_TX_SOP
);
5595 tcpm_set_state(port
, GET_SINK_CAP_TIMEOUT
, PD_T_SENDER_RESPONSE
);
5597 case GET_SINK_CAP_TIMEOUT
:
5598 port
->sink_cap_done
= true;
5599 tcpm_set_state(port
, ready_state(port
), 0);
5601 case ERROR_RECOVERY
:
5602 tcpm_swap_complete(port
, -EPROTO
);
5603 tcpm_pps_complete(port
, -EPROTO
);
5604 tcpm_set_state(port
, PORT_RESET
, 0);
5607 tcpm_reset_port(port
);
5608 if (port
->self_powered
)
5609 tcpm_set_cc(port
, TYPEC_CC_OPEN
);
5611 tcpm_set_cc(port
, tcpm_default_state(port
) == SNK_UNATTACHED
?
5612 TYPEC_CC_RD
: tcpm_rp_cc(port
));
5613 tcpm_set_state(port
, PORT_RESET_WAIT_OFF
,
5614 PD_T_ERROR_RECOVERY
);
5616 case PORT_RESET_WAIT_OFF
:
5617 tcpm_set_state(port
,
5618 tcpm_default_state(port
),
5619 port
->vbus_present
? PD_T_PS_SOURCE_OFF
: 0);
5622 /* AMS intermediate state */
5624 if (port
->upcoming_state
== INVALID_STATE
) {
5625 tcpm_set_state(port
, port
->pwr_role
== TYPEC_SOURCE
?
5626 SRC_READY
: SNK_READY
, 0);
5630 upcoming_state
= port
->upcoming_state
;
5631 port
->upcoming_state
= INVALID_STATE
;
5632 tcpm_set_state(port
, upcoming_state
, 0);
5636 case CHUNK_NOT_SUPP
:
5637 tcpm_pd_send_control(port
, PD_CTRL_NOT_SUPP
, TCPC_TX_SOP
);
5638 tcpm_set_state(port
, port
->pwr_role
== TYPEC_SOURCE
? SRC_READY
: SNK_READY
, 0);
5642 case SRC_VDM_IDENTITY_REQUEST
:
5643 port
->send_discover_prime
= true;
5644 port
->tx_sop_type
= TCPC_TX_SOP_PRIME
;
5645 mod_send_discover_delayed_work(port
, 0);
5646 port
->upcoming_state
= SRC_SEND_CAPABILITIES
;
5650 WARN(1, "Unexpected port state %d\n", port
->state
);
5655 static void tcpm_state_machine_work(struct kthread_work
*work
)
5657 struct tcpm_port
*port
= container_of(work
, struct tcpm_port
, state_machine
);
5658 enum tcpm_state prev_state
;
5660 mutex_lock(&port
->lock
);
5661 port
->state_machine_running
= true;
5663 if (port
->queued_message
&& tcpm_send_queued_message(port
))
5666 /* If we were queued due to a delayed state change, update it now */
5667 if (port
->delayed_state
) {
5668 tcpm_log(port
, "state change %s -> %s [delayed %ld ms]",
5669 tcpm_states
[port
->state
],
5670 tcpm_states
[port
->delayed_state
], port
->delay_ms
);
5671 port
->prev_state
= port
->state
;
5672 port
->state
= port
->delayed_state
;
5673 port
->delayed_state
= INVALID_STATE
;
5677 * Continue running as long as we have (non-delayed) state changes
5681 prev_state
= port
->state
;
5682 run_state_machine(port
);
5683 if (port
->queued_message
)
5684 tcpm_send_queued_message(port
);
5685 } while (port
->state
!= prev_state
&& !port
->delayed_state
);
5688 port
->state_machine_running
= false;
5689 mutex_unlock(&port
->lock
);
5692 static void _tcpm_cc_change(struct tcpm_port
*port
, enum typec_cc_status cc1
,
5693 enum typec_cc_status cc2
)
5695 enum typec_cc_status old_cc1
, old_cc2
;
5696 enum tcpm_state new_state
;
5698 old_cc1
= port
->cc1
;
5699 old_cc2
= port
->cc2
;
5703 tcpm_log_force(port
,
5704 "CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]",
5705 old_cc1
, cc1
, old_cc2
, cc2
, tcpm_states
[port
->state
],
5707 tcpm_port_is_disconnected(port
) ? "disconnected"
5710 switch (port
->state
) {
5712 if (tcpm_port_is_debug(port
) || tcpm_port_is_audio(port
) ||
5713 tcpm_port_is_source(port
))
5714 tcpm_set_state(port
, SRC_ATTACH_WAIT
, 0);
5715 else if (tcpm_port_is_sink(port
))
5716 tcpm_set_state(port
, SNK_ATTACH_WAIT
, 0);
5718 case CHECK_CONTAMINANT
:
5719 /* Wait for Toggling to be resumed */
5721 case SRC_UNATTACHED
:
5722 case ACC_UNATTACHED
:
5723 if (tcpm_port_is_debug(port
) || tcpm_port_is_audio(port
) ||
5724 tcpm_port_is_source(port
))
5725 tcpm_set_state(port
, SRC_ATTACH_WAIT
, 0);
5727 case SRC_ATTACH_WAIT
:
5728 if (tcpm_port_is_disconnected(port
) ||
5729 tcpm_port_is_audio_detached(port
))
5730 tcpm_set_state(port
, SRC_UNATTACHED
, 0);
5731 else if (cc1
!= old_cc1
|| cc2
!= old_cc2
)
5732 tcpm_set_state(port
, SRC_ATTACH_WAIT
, 0);
5736 case SRC_SEND_CAPABILITIES
:
5738 if (tcpm_port_is_disconnected(port
) ||
5739 !tcpm_port_is_source(port
)) {
5740 if (port
->port_type
== TYPEC_PORT_SRC
)
5741 tcpm_set_state(port
, SRC_UNATTACHED
, tcpm_wait_for_discharge(port
));
5743 tcpm_set_state(port
, SNK_UNATTACHED
, tcpm_wait_for_discharge(port
));
5746 case SNK_UNATTACHED
:
5747 if (tcpm_port_is_sink(port
))
5748 tcpm_set_state(port
, SNK_ATTACH_WAIT
, 0);
5750 case SNK_ATTACH_WAIT
:
5751 if ((port
->cc1
== TYPEC_CC_OPEN
&&
5752 port
->cc2
!= TYPEC_CC_OPEN
) ||
5753 (port
->cc1
!= TYPEC_CC_OPEN
&&
5754 port
->cc2
== TYPEC_CC_OPEN
))
5755 new_state
= SNK_DEBOUNCED
;
5756 else if (tcpm_port_is_disconnected(port
))
5757 new_state
= SNK_UNATTACHED
;
5760 if (new_state
!= port
->delayed_state
)
5761 tcpm_set_state(port
, SNK_ATTACH_WAIT
, 0);
5764 if (tcpm_port_is_disconnected(port
))
5765 new_state
= SNK_UNATTACHED
;
5766 else if (port
->vbus_present
)
5767 new_state
= tcpm_try_src(port
) ? SRC_TRY
: SNK_ATTACHED
;
5769 new_state
= SNK_UNATTACHED
;
5770 if (new_state
!= port
->delayed_state
)
5771 tcpm_set_state(port
, SNK_DEBOUNCED
, 0);
5775 * EXIT condition is based primarily on vbus disconnect and CC is secondary.
5776 * "A port that has entered into USB PD communications with the Source and
5777 * has seen the CC voltage exceed vRd-USB may monitor the CC pin to detect
5778 * cable disconnect in addition to monitoring VBUS.
5780 * A port that is monitoring the CC voltage for disconnect (but is not in
5781 * the process of a USB PD PR_Swap or USB PD FR_Swap) shall transition to
5782 * Unattached.SNK within tSinkDisconnect after the CC voltage remains below
5783 * vRd-USB for tPDDebounce."
5785 * When set_auto_vbus_discharge_threshold is enabled, CC pins go
5786 * away before vbus decays to disconnect threshold. Allow
5787 * disconnect to be driven by vbus disconnect when auto vbus
5788 * discharge is enabled.
5790 if (!port
->auto_vbus_discharge_enabled
&& tcpm_port_is_disconnected(port
))
5791 tcpm_set_state(port
, unattached_state(port
), 0);
5792 else if (!port
->pd_capable
&&
5793 (cc1
!= old_cc1
|| cc2
!= old_cc2
))
5794 tcpm_set_current_limit(port
,
5795 tcpm_get_current_limit(port
),
5799 case AUDIO_ACC_ATTACHED
:
5800 if (cc1
== TYPEC_CC_OPEN
|| cc2
== TYPEC_CC_OPEN
)
5801 tcpm_set_state(port
, AUDIO_ACC_DEBOUNCE
, 0);
5803 case AUDIO_ACC_DEBOUNCE
:
5804 if (tcpm_port_is_audio(port
))
5805 tcpm_set_state(port
, AUDIO_ACC_ATTACHED
, 0);
5808 case DEBUG_ACC_ATTACHED
:
5809 if (cc1
== TYPEC_CC_OPEN
|| cc2
== TYPEC_CC_OPEN
)
5810 tcpm_set_state(port
, ACC_UNATTACHED
, 0);
5814 /* Do nothing, waiting for timeout */
5818 /* CC line is unstable, wait for debounce */
5819 if (tcpm_port_is_disconnected(port
))
5820 tcpm_set_state(port
, SNK_DISCOVERY_DEBOUNCE
, 0);
5822 case SNK_DISCOVERY_DEBOUNCE
:
5826 /* Hand over to state machine if needed */
5827 if (!port
->vbus_present
&& tcpm_port_is_source(port
))
5828 tcpm_set_state(port
, SRC_TRYWAIT_DEBOUNCE
, 0);
5830 case SRC_TRYWAIT_DEBOUNCE
:
5831 if (port
->vbus_present
|| !tcpm_port_is_source(port
))
5832 tcpm_set_state(port
, SRC_TRYWAIT
, 0);
5834 case SNK_TRY_WAIT_DEBOUNCE
:
5835 if (!tcpm_port_is_sink(port
)) {
5837 tcpm_set_state(port
, SRC_TRYWAIT
, 0);
5841 if (tcpm_port_is_source(port
))
5842 tcpm_set_state(port
, SRC_TRY_DEBOUNCE
, 0);
5844 case SRC_TRY_DEBOUNCE
:
5845 tcpm_set_state(port
, SRC_TRY_WAIT
, 0);
5847 case SNK_TRYWAIT_DEBOUNCE
:
5848 if (tcpm_port_is_sink(port
))
5849 tcpm_set_state(port
, SNK_TRYWAIT_VBUS
, 0);
5851 case SNK_TRYWAIT_VBUS
:
5852 if (!tcpm_port_is_sink(port
))
5853 tcpm_set_state(port
, SNK_TRYWAIT_DEBOUNCE
, 0);
5855 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS
:
5856 if (!tcpm_port_is_sink(port
))
5857 tcpm_set_state(port
, SRC_TRYWAIT
, PD_T_TRY_CC_DEBOUNCE
);
5859 tcpm_set_state(port
, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS
, 0);
5862 /* Do nothing, waiting for tCCDebounce */
5864 case PR_SWAP_SNK_SRC_SINK_OFF
:
5865 case PR_SWAP_SRC_SNK_TRANSITION_OFF
:
5866 case PR_SWAP_SRC_SNK_SOURCE_OFF
:
5867 case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED
:
5868 case PR_SWAP_SNK_SRC_SOURCE_ON
:
5870 * CC state change is expected in PR_SWAP
5875 case FR_SWAP_SEND_TIMEOUT
:
5876 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF
:
5877 case FR_SWAP_SNK_SRC_NEW_SINK_READY
:
5878 case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED
:
5879 /* Do nothing, CC change expected */
5883 case PORT_RESET_WAIT_OFF
:
5885 * State set back to default mode once the timer completes.
5886 * Ignore CC changes here.
5891 * While acting as sink and auto vbus discharge is enabled, Allow disconnect
5892 * to be driven by vbus disconnect.
5894 if (tcpm_port_is_disconnected(port
) && !(port
->pwr_role
== TYPEC_SINK
&&
5895 port
->auto_vbus_discharge_enabled
))
5896 tcpm_set_state(port
, unattached_state(port
), 0);
5901 static void _tcpm_pd_vbus_on(struct tcpm_port
*port
)
5903 tcpm_log_force(port
, "VBUS on");
5904 port
->vbus_present
= true;
5906 * When vbus_present is true i.e. Voltage at VBUS is greater than VSAFE5V implicitly
5907 * states that vbus is not at VSAFE0V, hence clear the vbus_vsafe0v flag here.
5909 port
->vbus_vsafe0v
= false;
5911 switch (port
->state
) {
5912 case SNK_TRANSITION_SINK_VBUS
:
5913 port
->explicit_contract
= true;
5914 tcpm_set_state(port
, SNK_READY
, 0);
5917 tcpm_set_state(port
, SNK_DISCOVERY
, 0);
5921 tcpm_set_state(port
, tcpm_try_src(port
) ? SRC_TRY
5925 case SNK_HARD_RESET_WAIT_VBUS
:
5926 tcpm_set_state(port
, SNK_HARD_RESET_SINK_ON
, 0);
5929 tcpm_set_state(port
, SRC_STARTUP
, 0);
5931 case SRC_HARD_RESET_VBUS_ON
:
5932 tcpm_set_state(port
, SRC_STARTUP
, 0);
5936 /* Do nothing, waiting for timeout */
5939 /* Do nothing, Waiting for Rd to be detected */
5941 case SRC_TRYWAIT_DEBOUNCE
:
5942 tcpm_set_state(port
, SRC_TRYWAIT
, 0);
5944 case SNK_TRY_WAIT_DEBOUNCE
:
5945 /* Do nothing, waiting for PD_DEBOUNCE to do be done */
5948 /* Do nothing, waiting for tCCDebounce */
5950 case SNK_TRYWAIT_VBUS
:
5951 if (tcpm_port_is_sink(port
))
5952 tcpm_set_state(port
, SNK_ATTACHED
, 0);
5954 case SNK_TRYWAIT_DEBOUNCE
:
5955 /* Do nothing, waiting for Rp */
5957 case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS
:
5958 if (port
->vbus_present
&& tcpm_port_is_sink(port
))
5959 tcpm_set_state(port
, SNK_ATTACHED
, 0);
5962 case SRC_TRY_DEBOUNCE
:
5963 /* Do nothing, waiting for sink detection */
5966 case FR_SWAP_SEND_TIMEOUT
:
5967 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF
:
5968 case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED
:
5969 if (port
->tcpc
->frs_sourcing_vbus
)
5970 port
->tcpc
->frs_sourcing_vbus(port
->tcpc
);
5972 case FR_SWAP_SNK_SRC_NEW_SINK_READY
:
5973 if (port
->tcpc
->frs_sourcing_vbus
)
5974 port
->tcpc
->frs_sourcing_vbus(port
->tcpc
);
5975 tcpm_set_state(port
, FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED
, 0);
5979 case PORT_RESET_WAIT_OFF
:
5981 * State set back to default mode once the timer completes.
5982 * Ignore vbus changes here.
5991 static void _tcpm_pd_vbus_off(struct tcpm_port
*port
)
5993 tcpm_log_force(port
, "VBUS off");
5994 port
->vbus_present
= false;
5995 port
->vbus_never_low
= false;
5996 switch (port
->state
) {
5997 case SNK_HARD_RESET_SINK_OFF
:
5998 tcpm_set_state(port
, SNK_HARD_RESET_WAIT_VBUS
, 0);
6000 case HARD_RESET_SEND
:
6003 /* Do nothing, waiting for timeout */
6006 /* Hand over to state machine if needed */
6007 if (tcpm_port_is_source(port
))
6008 tcpm_set_state(port
, SRC_TRYWAIT_DEBOUNCE
, 0);
6010 case SNK_TRY_WAIT_DEBOUNCE
:
6011 /* Do nothing, waiting for PD_DEBOUNCE to do be done */
6014 case SNK_TRYWAIT_VBUS
:
6015 case SNK_TRYWAIT_DEBOUNCE
:
6017 case SNK_ATTACH_WAIT
:
6019 /* Do nothing, as TCPM is still waiting for vbus to reaach VSAFE5V to connect */
6022 case SNK_NEGOTIATE_CAPABILITIES
:
6025 case PR_SWAP_SRC_SNK_TRANSITION_OFF
:
6026 tcpm_set_state(port
, PR_SWAP_SRC_SNK_SOURCE_OFF
, 0);
6029 case PR_SWAP_SNK_SRC_SINK_OFF
:
6030 /* Do nothing, expected */
6033 case PR_SWAP_SNK_SRC_SOURCE_ON
:
6035 * Do nothing when vbus off notification is received.
6036 * TCPM can wait for PD_T_NEWSRC in PR_SWAP_SNK_SRC_SOURCE_ON
6037 * for the vbus source to ramp up.
6041 case PORT_RESET_WAIT_OFF
:
6042 tcpm_set_state(port
, tcpm_default_state(port
), 0);
6046 case SRC_TRY_DEBOUNCE
:
6047 /* Do nothing, waiting for sink detection */
6051 case SRC_SEND_CAPABILITIES
:
6052 case SRC_SEND_CAPABILITIES_TIMEOUT
:
6053 case SRC_NEGOTIATE_CAPABILITIES
:
6054 case SRC_TRANSITION_SUPPLY
:
6056 case SRC_WAIT_NEW_CAPABILITIES
:
6058 * Force to unattached state to re-initiate connection.
6059 * DRP port should move to Unattached.SNK instead of Unattached.SRC if
6060 * sink removed. Although sink removal here is due to source's vbus collapse,
6061 * treat it the same way for consistency.
6063 if (port
->port_type
== TYPEC_PORT_SRC
)
6064 tcpm_set_state(port
, SRC_UNATTACHED
, tcpm_wait_for_discharge(port
));
6066 tcpm_set_state(port
, SNK_UNATTACHED
, tcpm_wait_for_discharge(port
));
6071 * State set back to default mode once the timer completes.
6072 * Ignore vbus changes here.
6077 case FR_SWAP_SEND_TIMEOUT
:
6078 case FR_SWAP_SNK_SRC_TRANSITION_TO_OFF
:
6079 case FR_SWAP_SNK_SRC_NEW_SINK_READY
:
6080 case FR_SWAP_SNK_SRC_SOURCE_VBUS_APPLIED
:
6081 /* Do nothing, vbus drop expected */
6084 case SNK_HARD_RESET_WAIT_VBUS
:
6085 /* Do nothing, its OK to receive vbus off events */
6089 if (port
->pwr_role
== TYPEC_SINK
&& port
->attached
)
6090 tcpm_set_state(port
, SNK_UNATTACHED
, tcpm_wait_for_discharge(port
));
6095 static void _tcpm_pd_vbus_vsafe0v(struct tcpm_port
*port
)
6097 tcpm_log_force(port
, "VBUS VSAFE0V");
6098 port
->vbus_vsafe0v
= true;
6099 switch (port
->state
) {
6100 case SRC_HARD_RESET_VBUS_OFF
:
6102 * After establishing the vSafe0V voltage condition on VBUS, the Source Shall wait
6103 * tSrcRecover before re-applying VCONN and restoring VBUS to vSafe5V.
6105 tcpm_set_state(port
, SRC_HARD_RESET_VBUS_ON
, PD_T_SRC_RECOVER
);
6107 case SRC_ATTACH_WAIT
:
6108 if (tcpm_port_is_source(port
))
6109 tcpm_set_state(port
, tcpm_try_snk(port
) ? SNK_TRY
: SRC_ATTACHED
,
6113 case SRC_SEND_CAPABILITIES
:
6114 case SRC_SEND_CAPABILITIES_TIMEOUT
:
6115 case SRC_NEGOTIATE_CAPABILITIES
:
6116 case SRC_TRANSITION_SUPPLY
:
6118 case SRC_WAIT_NEW_CAPABILITIES
:
6119 if (port
->auto_vbus_discharge_enabled
) {
6120 if (port
->port_type
== TYPEC_PORT_SRC
)
6121 tcpm_set_state(port
, SRC_UNATTACHED
, 0);
6123 tcpm_set_state(port
, SNK_UNATTACHED
, 0);
6126 case PR_SWAP_SNK_SRC_SINK_OFF
:
6127 case PR_SWAP_SNK_SRC_SOURCE_ON
:
6128 /* Do nothing, vsafe0v is expected during transition */
6130 case SNK_ATTACH_WAIT
:
6132 /*Do nothing, still waiting for VSAFE5V for connect */
6134 case SNK_HARD_RESET_WAIT_VBUS
:
6135 /* Do nothing, its OK to receive vbus off events */
6138 if (port
->pwr_role
== TYPEC_SINK
&& port
->auto_vbus_discharge_enabled
)
6139 tcpm_set_state(port
, SNK_UNATTACHED
, 0);
6144 static void _tcpm_pd_hard_reset(struct tcpm_port
*port
)
6146 tcpm_log_force(port
, "Received hard reset");
6147 if (port
->bist_request
== BDO_MODE_TESTDATA
&& port
->tcpc
->set_bist_data
)
6148 port
->tcpc
->set_bist_data(port
->tcpc
, false);
6150 switch (port
->state
) {
6151 case ERROR_RECOVERY
:
6153 case PORT_RESET_WAIT_OFF
:
6159 if (port
->ams
!= NONE_AMS
)
6160 port
->ams
= NONE_AMS
;
6161 if (port
->hard_reset_count
< PD_N_HARD_RESET_COUNT
)
6162 port
->ams
= HARD_RESET
;
6164 * If we keep receiving hard reset requests, executing the hard reset
6165 * must have failed. Revert to error recovery if that happens.
6167 tcpm_set_state(port
,
6168 port
->hard_reset_count
< PD_N_HARD_RESET_COUNT
?
6169 HARD_RESET_START
: ERROR_RECOVERY
,
6173 static void tcpm_pd_event_handler(struct kthread_work
*work
)
6175 struct tcpm_port
*port
= container_of(work
, struct tcpm_port
,
6179 mutex_lock(&port
->lock
);
6181 spin_lock(&port
->pd_event_lock
);
6182 while (port
->pd_events
) {
6183 events
= port
->pd_events
;
6184 port
->pd_events
= 0;
6185 spin_unlock(&port
->pd_event_lock
);
6186 if (events
& TCPM_RESET_EVENT
)
6187 _tcpm_pd_hard_reset(port
);
6188 if (events
& TCPM_VBUS_EVENT
) {
6191 vbus
= port
->tcpc
->get_vbus(port
->tcpc
);
6193 _tcpm_pd_vbus_on(port
);
6195 _tcpm_pd_vbus_off(port
);
6197 * When TCPC does not support detecting vsafe0v voltage level,
6198 * treat vbus absent as vsafe0v. Else invoke is_vbus_vsafe0v
6199 * to see if vbus has discharge to VSAFE0V.
6201 if (!port
->tcpc
->is_vbus_vsafe0v
||
6202 port
->tcpc
->is_vbus_vsafe0v(port
->tcpc
))
6203 _tcpm_pd_vbus_vsafe0v(port
);
6206 if (events
& TCPM_CC_EVENT
) {
6207 enum typec_cc_status cc1
, cc2
;
6209 if (port
->tcpc
->get_cc(port
->tcpc
, &cc1
, &cc2
) == 0)
6210 _tcpm_cc_change(port
, cc1
, cc2
);
6212 if (events
& TCPM_FRS_EVENT
) {
6213 if (port
->state
== SNK_READY
) {
6216 port
->upcoming_state
= FR_SWAP_SEND
;
6217 ret
= tcpm_ams_start(port
, FAST_ROLE_SWAP
);
6219 port
->upcoming_state
= INVALID_STATE
;
6221 tcpm_log(port
, "Discarding FRS_SIGNAL! Not in sink ready");
6224 if (events
& TCPM_SOURCING_VBUS
) {
6225 tcpm_log(port
, "sourcing vbus");
6227 * In fast role swap case TCPC autonomously sources vbus. Set vbus_source
6228 * true as TCPM wouldn't have called tcpm_set_vbus.
6230 * When vbus is sourced on the command on TCPM i.e. TCPM called
6231 * tcpm_set_vbus to source vbus, vbus_source would already be true.
6233 port
->vbus_source
= true;
6234 _tcpm_pd_vbus_on(port
);
6236 if (events
& TCPM_PORT_CLEAN
) {
6237 tcpm_log(port
, "port clean");
6238 if (port
->state
== CHECK_CONTAMINANT
) {
6239 if (tcpm_start_toggling(port
, tcpm_rp_cc(port
)))
6240 tcpm_set_state(port
, TOGGLING
, 0);
6242 tcpm_set_state(port
, tcpm_default_state(port
), 0);
6245 if (events
& TCPM_PORT_ERROR
) {
6246 tcpm_log(port
, "port triggering error recovery");
6247 tcpm_set_state(port
, ERROR_RECOVERY
, 0);
6250 spin_lock(&port
->pd_event_lock
);
6252 spin_unlock(&port
->pd_event_lock
);
6253 mutex_unlock(&port
->lock
);
6256 void tcpm_cc_change(struct tcpm_port
*port
)
6258 spin_lock(&port
->pd_event_lock
);
6259 port
->pd_events
|= TCPM_CC_EVENT
;
6260 spin_unlock(&port
->pd_event_lock
);
6261 kthread_queue_work(port
->wq
, &port
->event_work
);
6263 EXPORT_SYMBOL_GPL(tcpm_cc_change
);
6265 void tcpm_vbus_change(struct tcpm_port
*port
)
6267 spin_lock(&port
->pd_event_lock
);
6268 port
->pd_events
|= TCPM_VBUS_EVENT
;
6269 spin_unlock(&port
->pd_event_lock
);
6270 kthread_queue_work(port
->wq
, &port
->event_work
);
6272 EXPORT_SYMBOL_GPL(tcpm_vbus_change
);
6274 void tcpm_pd_hard_reset(struct tcpm_port
*port
)
6276 spin_lock(&port
->pd_event_lock
);
6277 port
->pd_events
= TCPM_RESET_EVENT
;
6278 spin_unlock(&port
->pd_event_lock
);
6279 kthread_queue_work(port
->wq
, &port
->event_work
);
6281 EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset
);
6283 void tcpm_sink_frs(struct tcpm_port
*port
)
6285 spin_lock(&port
->pd_event_lock
);
6286 port
->pd_events
|= TCPM_FRS_EVENT
;
6287 spin_unlock(&port
->pd_event_lock
);
6288 kthread_queue_work(port
->wq
, &port
->event_work
);
6290 EXPORT_SYMBOL_GPL(tcpm_sink_frs
);
6292 void tcpm_sourcing_vbus(struct tcpm_port
*port
)
6294 spin_lock(&port
->pd_event_lock
);
6295 port
->pd_events
|= TCPM_SOURCING_VBUS
;
6296 spin_unlock(&port
->pd_event_lock
);
6297 kthread_queue_work(port
->wq
, &port
->event_work
);
6299 EXPORT_SYMBOL_GPL(tcpm_sourcing_vbus
);
6301 void tcpm_port_clean(struct tcpm_port
*port
)
6303 spin_lock(&port
->pd_event_lock
);
6304 port
->pd_events
|= TCPM_PORT_CLEAN
;
6305 spin_unlock(&port
->pd_event_lock
);
6306 kthread_queue_work(port
->wq
, &port
->event_work
);
6308 EXPORT_SYMBOL_GPL(tcpm_port_clean
);
6310 bool tcpm_port_is_toggling(struct tcpm_port
*port
)
6312 return port
->port_type
== TYPEC_PORT_DRP
&& port
->state
== TOGGLING
;
6314 EXPORT_SYMBOL_GPL(tcpm_port_is_toggling
);
6316 void tcpm_port_error_recovery(struct tcpm_port
*port
)
6318 spin_lock(&port
->pd_event_lock
);
6319 port
->pd_events
|= TCPM_PORT_ERROR
;
6320 spin_unlock(&port
->pd_event_lock
);
6321 kthread_queue_work(port
->wq
, &port
->event_work
);
6323 EXPORT_SYMBOL_GPL(tcpm_port_error_recovery
);
6325 static void tcpm_enable_frs_work(struct kthread_work
*work
)
6327 struct tcpm_port
*port
= container_of(work
, struct tcpm_port
, enable_frs
);
6330 mutex_lock(&port
->lock
);
6331 /* Not FRS capable */
6332 if (!port
->connected
|| port
->port_type
!= TYPEC_PORT_DRP
||
6333 port
->pwr_opmode
!= TYPEC_PWR_MODE_PD
||
6334 !port
->tcpc
->enable_frs
||
6335 /* Sink caps queried */
6336 port
->sink_cap_done
|| port
->negotiated_rev
< PD_REV30
)
6339 /* Send when the state machine is idle */
6340 if (port
->state
!= SNK_READY
|| port
->vdm_sm_running
|| port
->send_discover
||
6341 port
->send_discover_prime
)
6344 port
->upcoming_state
= GET_SINK_CAP
;
6345 ret
= tcpm_ams_start(port
, GET_SINK_CAPABILITIES
);
6346 if (ret
== -EAGAIN
) {
6347 port
->upcoming_state
= INVALID_STATE
;
6349 port
->sink_cap_done
= true;
6353 mod_enable_frs_delayed_work(port
, GET_SINK_CAP_RETRY_MS
);
6355 mutex_unlock(&port
->lock
);
6358 static void tcpm_send_discover_work(struct kthread_work
*work
)
6360 struct tcpm_port
*port
= container_of(work
, struct tcpm_port
, send_discover_work
);
6362 mutex_lock(&port
->lock
);
6363 /* No need to send DISCOVER_IDENTITY anymore */
6364 if (!port
->send_discover
&& !port
->send_discover_prime
)
6367 if (port
->data_role
== TYPEC_DEVICE
&& port
->negotiated_rev
< PD_REV30
) {
6368 port
->send_discover
= false;
6369 port
->send_discover_prime
= false;
6373 /* Retry if the port is not idle */
6374 if ((port
->state
!= SRC_READY
&& port
->state
!= SNK_READY
&&
6375 port
->state
!= SRC_VDM_IDENTITY_REQUEST
) || port
->vdm_sm_running
) {
6376 mod_send_discover_delayed_work(port
, SEND_DISCOVER_RETRY_MS
);
6380 tcpm_send_vdm(port
, USB_SID_PD
, CMD_DISCOVER_IDENT
, NULL
, 0, port
->tx_sop_type
);
6383 mutex_unlock(&port
->lock
);
6386 static int tcpm_dr_set(struct typec_port
*p
, enum typec_data_role data
)
6388 struct tcpm_port
*port
= typec_get_drvdata(p
);
6391 mutex_lock(&port
->swap_lock
);
6392 mutex_lock(&port
->lock
);
6394 if (port
->typec_caps
.data
!= TYPEC_PORT_DRD
) {
6398 if (port
->state
!= SRC_READY
&& port
->state
!= SNK_READY
) {
6403 if (port
->data_role
== data
) {
6410 * 6.3.9: If an alternate mode is active, a request to swap
6411 * alternate modes shall trigger a port reset.
6412 * Reject data role swap request in this case.
6415 if (!port
->pd_capable
) {
6417 * If the partner is not PD capable, reset the port to
6418 * trigger a role change. This can only work if a preferred
6419 * role is configured, and if it matches the requested role.
6421 if (port
->try_role
== TYPEC_NO_PREFERRED_ROLE
||
6422 port
->try_role
== port
->pwr_role
) {
6426 port
->non_pd_role_swap
= true;
6427 tcpm_set_state(port
, PORT_RESET
, 0);
6429 port
->upcoming_state
= DR_SWAP_SEND
;
6430 ret
= tcpm_ams_start(port
, DATA_ROLE_SWAP
);
6431 if (ret
== -EAGAIN
) {
6432 port
->upcoming_state
= INVALID_STATE
;
6437 port
->swap_status
= 0;
6438 port
->swap_pending
= true;
6439 reinit_completion(&port
->swap_complete
);
6440 mutex_unlock(&port
->lock
);
6442 if (!wait_for_completion_timeout(&port
->swap_complete
,
6443 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT
)))
6446 ret
= port
->swap_status
;
6448 port
->non_pd_role_swap
= false;
6452 mutex_unlock(&port
->lock
);
6454 mutex_unlock(&port
->swap_lock
);
6458 static int tcpm_pr_set(struct typec_port
*p
, enum typec_role role
)
6460 struct tcpm_port
*port
= typec_get_drvdata(p
);
6463 mutex_lock(&port
->swap_lock
);
6464 mutex_lock(&port
->lock
);
6466 if (port
->port_type
!= TYPEC_PORT_DRP
) {
6470 if (port
->state
!= SRC_READY
&& port
->state
!= SNK_READY
) {
6475 if (role
== port
->pwr_role
) {
6480 port
->upcoming_state
= PR_SWAP_SEND
;
6481 ret
= tcpm_ams_start(port
, POWER_ROLE_SWAP
);
6482 if (ret
== -EAGAIN
) {
6483 port
->upcoming_state
= INVALID_STATE
;
6487 port
->swap_status
= 0;
6488 port
->swap_pending
= true;
6489 reinit_completion(&port
->swap_complete
);
6490 mutex_unlock(&port
->lock
);
6492 if (!wait_for_completion_timeout(&port
->swap_complete
,
6493 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT
)))
6496 ret
= port
->swap_status
;
6501 mutex_unlock(&port
->lock
);
6503 mutex_unlock(&port
->swap_lock
);
6507 static int tcpm_vconn_set(struct typec_port
*p
, enum typec_role role
)
6509 struct tcpm_port
*port
= typec_get_drvdata(p
);
6512 mutex_lock(&port
->swap_lock
);
6513 mutex_lock(&port
->lock
);
6515 if (port
->state
!= SRC_READY
&& port
->state
!= SNK_READY
) {
6520 if (role
== port
->vconn_role
) {
6525 port
->upcoming_state
= VCONN_SWAP_SEND
;
6526 ret
= tcpm_ams_start(port
, VCONN_SWAP
);
6527 if (ret
== -EAGAIN
) {
6528 port
->upcoming_state
= INVALID_STATE
;
6532 port
->swap_status
= 0;
6533 port
->swap_pending
= true;
6534 reinit_completion(&port
->swap_complete
);
6535 mutex_unlock(&port
->lock
);
6537 if (!wait_for_completion_timeout(&port
->swap_complete
,
6538 msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT
)))
6541 ret
= port
->swap_status
;
6546 mutex_unlock(&port
->lock
);
6548 mutex_unlock(&port
->swap_lock
);
6552 static int tcpm_try_role(struct typec_port
*p
, int role
)
6554 struct tcpm_port
*port
= typec_get_drvdata(p
);
6555 struct tcpc_dev
*tcpc
= port
->tcpc
;
6558 mutex_lock(&port
->lock
);
6560 ret
= tcpc
->try_role(tcpc
, role
);
6562 port
->try_role
= role
;
6563 port
->try_src_count
= 0;
6564 port
->try_snk_count
= 0;
6565 mutex_unlock(&port
->lock
);
6570 static int tcpm_pps_set_op_curr(struct tcpm_port
*port
, u16 req_op_curr
)
6572 unsigned int target_mw
;
6575 mutex_lock(&port
->swap_lock
);
6576 mutex_lock(&port
->lock
);
6578 if (!port
->pps_data
.active
) {
6583 if (port
->state
!= SNK_READY
) {
6588 if (req_op_curr
> port
->pps_data
.max_curr
) {
6593 target_mw
= (req_op_curr
* port
->supply_voltage
) / 1000;
6594 if (target_mw
< port
->operating_snk_mw
) {
6599 port
->upcoming_state
= SNK_NEGOTIATE_PPS_CAPABILITIES
;
6600 ret
= tcpm_ams_start(port
, POWER_NEGOTIATION
);
6601 if (ret
== -EAGAIN
) {
6602 port
->upcoming_state
= INVALID_STATE
;
6606 /* Round down operating current to align with PPS valid steps */
6607 req_op_curr
= req_op_curr
- (req_op_curr
% RDO_PROG_CURR_MA_STEP
);
6609 reinit_completion(&port
->pps_complete
);
6610 port
->pps_data
.req_op_curr
= req_op_curr
;
6611 port
->pps_status
= 0;
6612 port
->pps_pending
= true;
6613 mutex_unlock(&port
->lock
);
6615 if (!wait_for_completion_timeout(&port
->pps_complete
,
6616 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT
)))
6619 ret
= port
->pps_status
;
6624 mutex_unlock(&port
->lock
);
6626 mutex_unlock(&port
->swap_lock
);
6631 static int tcpm_pps_set_out_volt(struct tcpm_port
*port
, u16 req_out_volt
)
6633 unsigned int target_mw
;
6636 mutex_lock(&port
->swap_lock
);
6637 mutex_lock(&port
->lock
);
6639 if (!port
->pps_data
.active
) {
6644 if (port
->state
!= SNK_READY
) {
6649 target_mw
= (port
->current_limit
* req_out_volt
) / 1000;
6650 if (target_mw
< port
->operating_snk_mw
) {
6655 port
->upcoming_state
= SNK_NEGOTIATE_PPS_CAPABILITIES
;
6656 ret
= tcpm_ams_start(port
, POWER_NEGOTIATION
);
6657 if (ret
== -EAGAIN
) {
6658 port
->upcoming_state
= INVALID_STATE
;
6662 /* Round down output voltage to align with PPS valid steps */
6663 req_out_volt
= req_out_volt
- (req_out_volt
% RDO_PROG_VOLT_MV_STEP
);
6665 reinit_completion(&port
->pps_complete
);
6666 port
->pps_data
.req_out_volt
= req_out_volt
;
6667 port
->pps_status
= 0;
6668 port
->pps_pending
= true;
6669 mutex_unlock(&port
->lock
);
6671 if (!wait_for_completion_timeout(&port
->pps_complete
,
6672 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT
)))
6675 ret
= port
->pps_status
;
6680 mutex_unlock(&port
->lock
);
6682 mutex_unlock(&port
->swap_lock
);
6687 static int tcpm_pps_activate(struct tcpm_port
*port
, bool activate
)
6691 mutex_lock(&port
->swap_lock
);
6692 mutex_lock(&port
->lock
);
6694 if (!port
->pps_data
.supported
) {
6699 /* Trying to deactivate PPS when already deactivated so just bail */
6700 if (!port
->pps_data
.active
&& !activate
)
6703 if (port
->state
!= SNK_READY
) {
6709 port
->upcoming_state
= SNK_NEGOTIATE_PPS_CAPABILITIES
;
6711 port
->upcoming_state
= SNK_NEGOTIATE_CAPABILITIES
;
6712 ret
= tcpm_ams_start(port
, POWER_NEGOTIATION
);
6713 if (ret
== -EAGAIN
) {
6714 port
->upcoming_state
= INVALID_STATE
;
6718 reinit_completion(&port
->pps_complete
);
6719 port
->pps_status
= 0;
6720 port
->pps_pending
= true;
6722 /* Trigger PPS request or move back to standard PDO contract */
6724 port
->pps_data
.req_out_volt
= port
->supply_voltage
;
6725 port
->pps_data
.req_op_curr
= port
->current_limit
;
6727 mutex_unlock(&port
->lock
);
6729 if (!wait_for_completion_timeout(&port
->pps_complete
,
6730 msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT
)))
6733 ret
= port
->pps_status
;
6738 mutex_unlock(&port
->lock
);
6740 mutex_unlock(&port
->swap_lock
);
6745 static void tcpm_init(struct tcpm_port
*port
)
6747 enum typec_cc_status cc1
, cc2
;
6749 port
->tcpc
->init(port
->tcpc
);
6751 tcpm_reset_port(port
);
6755 * Should possibly wait for VBUS to settle if it was enabled locally
6756 * since tcpm_reset_port() will disable VBUS.
6758 port
->vbus_present
= port
->tcpc
->get_vbus(port
->tcpc
);
6759 if (port
->vbus_present
)
6760 port
->vbus_never_low
= true;
6763 * 1. When vbus_present is true, voltage on VBUS is already at VSAFE5V.
6764 * So implicitly vbus_vsafe0v = false.
6766 * 2. When vbus_present is false and TCPC does NOT support querying
6767 * vsafe0v status, then, it's best to assume vbus is at VSAFE0V i.e.
6768 * vbus_vsafe0v is true.
6770 * 3. When vbus_present is false and TCPC does support querying vsafe0v,
6771 * then, query tcpc for vsafe0v status.
6773 if (port
->vbus_present
)
6774 port
->vbus_vsafe0v
= false;
6775 else if (!port
->tcpc
->is_vbus_vsafe0v
)
6776 port
->vbus_vsafe0v
= true;
6778 port
->vbus_vsafe0v
= port
->tcpc
->is_vbus_vsafe0v(port
->tcpc
);
6780 tcpm_set_state(port
, tcpm_default_state(port
), 0);
6782 if (port
->tcpc
->get_cc(port
->tcpc
, &cc1
, &cc2
) == 0)
6783 _tcpm_cc_change(port
, cc1
, cc2
);
6786 * Some adapters need a clean slate at startup, and won't recover
6787 * otherwise. So do not try to be fancy and force a clean disconnect.
6789 tcpm_set_state(port
, PORT_RESET
, 0);
6792 static int tcpm_port_type_set(struct typec_port
*p
, enum typec_port_type type
)
6794 struct tcpm_port
*port
= typec_get_drvdata(p
);
6796 mutex_lock(&port
->lock
);
6797 if (type
== port
->port_type
)
6800 port
->port_type
= type
;
6802 if (!port
->connected
) {
6803 tcpm_set_state(port
, PORT_RESET
, 0);
6804 } else if (type
== TYPEC_PORT_SNK
) {
6805 if (!(port
->pwr_role
== TYPEC_SINK
&&
6806 port
->data_role
== TYPEC_DEVICE
))
6807 tcpm_set_state(port
, PORT_RESET
, 0);
6808 } else if (type
== TYPEC_PORT_SRC
) {
6809 if (!(port
->pwr_role
== TYPEC_SOURCE
&&
6810 port
->data_role
== TYPEC_HOST
))
6811 tcpm_set_state(port
, PORT_RESET
, 0);
6815 mutex_unlock(&port
->lock
);
6819 static struct pd_data
*tcpm_find_pd_data(struct tcpm_port
*port
, struct usb_power_delivery
*pd
)
6823 for (i
= 0; port
->pd_list
[i
]; i
++) {
6824 if (port
->pd_list
[i
]->pd
== pd
)
6825 return port
->pd_list
[i
];
6828 return ERR_PTR(-ENODATA
);
6831 static struct usb_power_delivery
**tcpm_pd_get(struct typec_port
*p
)
6833 struct tcpm_port
*port
= typec_get_drvdata(p
);
6838 static int tcpm_pd_set(struct typec_port
*p
, struct usb_power_delivery
*pd
)
6840 struct tcpm_port
*port
= typec_get_drvdata(p
);
6841 struct pd_data
*data
;
6844 mutex_lock(&port
->lock
);
6846 if (port
->selected_pd
== pd
)
6849 data
= tcpm_find_pd_data(port
, pd
);
6851 ret
= PTR_ERR(data
);
6855 if (data
->sink_desc
.pdo
[0]) {
6856 for (i
= 0; i
< PDO_MAX_OBJECTS
&& data
->sink_desc
.pdo
[i
]; i
++)
6857 port
->snk_pdo
[i
] = data
->sink_desc
.pdo
[i
];
6858 port
->nr_snk_pdo
= i
+ 1;
6859 port
->operating_snk_mw
= data
->operating_snk_mw
;
6862 if (data
->source_desc
.pdo
[0]) {
6863 for (i
= 0; i
< PDO_MAX_OBJECTS
&& data
->source_desc
.pdo
[i
]; i
++)
6864 port
->snk_pdo
[i
] = data
->source_desc
.pdo
[i
];
6865 port
->nr_src_pdo
= i
+ 1;
6868 switch (port
->state
) {
6869 case SRC_UNATTACHED
:
6870 case SRC_ATTACH_WAIT
:
6872 tcpm_set_cc(port
, tcpm_rp_cc(port
));
6874 case SRC_SEND_CAPABILITIES
:
6875 case SRC_SEND_CAPABILITIES_TIMEOUT
:
6876 case SRC_NEGOTIATE_CAPABILITIES
:
6878 case SRC_WAIT_NEW_CAPABILITIES
:
6879 port
->caps_count
= 0;
6880 port
->upcoming_state
= SRC_SEND_CAPABILITIES
;
6881 ret
= tcpm_ams_start(port
, POWER_NEGOTIATION
);
6882 if (ret
== -EAGAIN
) {
6883 port
->upcoming_state
= INVALID_STATE
;
6887 case SNK_NEGOTIATE_CAPABILITIES
:
6888 case SNK_NEGOTIATE_PPS_CAPABILITIES
:
6890 case SNK_TRANSITION_SINK
:
6891 case SNK_TRANSITION_SINK_VBUS
:
6892 if (port
->pps_data
.active
)
6893 port
->upcoming_state
= SNK_NEGOTIATE_PPS_CAPABILITIES
;
6894 else if (port
->pd_capable
)
6895 port
->upcoming_state
= SNK_NEGOTIATE_CAPABILITIES
;
6899 port
->update_sink_caps
= true;
6901 ret
= tcpm_ams_start(port
, POWER_NEGOTIATION
);
6902 if (ret
== -EAGAIN
) {
6903 port
->upcoming_state
= INVALID_STATE
;
6911 port
->port_source_caps
= data
->source_cap
;
6912 port
->port_sink_caps
= data
->sink_cap
;
6913 port
->selected_pd
= pd
;
6915 mutex_unlock(&port
->lock
);
6919 static const struct typec_operations tcpm_ops
= {
6920 .try_role
= tcpm_try_role
,
6921 .dr_set
= tcpm_dr_set
,
6922 .pr_set
= tcpm_pr_set
,
6923 .vconn_set
= tcpm_vconn_set
,
6924 .port_type_set
= tcpm_port_type_set
,
6925 .pd_get
= tcpm_pd_get
,
6926 .pd_set
= tcpm_pd_set
6929 void tcpm_tcpc_reset(struct tcpm_port
*port
)
6931 mutex_lock(&port
->lock
);
6932 /* XXX: Maintain PD connection if possible? */
6934 mutex_unlock(&port
->lock
);
6936 EXPORT_SYMBOL_GPL(tcpm_tcpc_reset
);
6938 static void tcpm_port_unregister_pd(struct tcpm_port
*port
)
6942 port
->port_sink_caps
= NULL
;
6943 port
->port_source_caps
= NULL
;
6944 for (i
= 0; i
< port
->pd_count
; i
++) {
6945 usb_power_delivery_unregister_capabilities(port
->pd_list
[i
]->sink_cap
);
6946 kfree(port
->pd_list
[i
]->sink_cap
);
6947 usb_power_delivery_unregister_capabilities(port
->pd_list
[i
]->source_cap
);
6948 kfree(port
->pd_list
[i
]->source_cap
);
6949 devm_kfree(port
->dev
, port
->pd_list
[i
]);
6950 port
->pd_list
[i
] = NULL
;
6951 usb_power_delivery_unregister(port
->pds
[i
]);
6952 port
->pds
[i
] = NULL
;
6956 static int tcpm_port_register_pd(struct tcpm_port
*port
)
6958 struct usb_power_delivery_desc desc
= { port
->typec_caps
.pd_revision
};
6959 struct usb_power_delivery_capabilities
*cap
;
6962 if (!port
->nr_src_pdo
&& !port
->nr_snk_pdo
)
6965 for (i
= 0; i
< port
->pd_count
; i
++) {
6966 port
->pds
[i
] = usb_power_delivery_register(port
->dev
, &desc
);
6967 if (IS_ERR(port
->pds
[i
])) {
6968 ret
= PTR_ERR(port
->pds
[i
]);
6969 goto err_unregister
;
6971 port
->pd_list
[i
]->pd
= port
->pds
[i
];
6973 if (port
->pd_list
[i
]->source_desc
.pdo
[0]) {
6974 cap
= usb_power_delivery_register_capabilities(port
->pds
[i
],
6975 &port
->pd_list
[i
]->source_desc
);
6978 goto err_unregister
;
6980 port
->pd_list
[i
]->source_cap
= cap
;
6983 if (port
->pd_list
[i
]->sink_desc
.pdo
[0]) {
6984 cap
= usb_power_delivery_register_capabilities(port
->pds
[i
],
6985 &port
->pd_list
[i
]->sink_desc
);
6988 goto err_unregister
;
6990 port
->pd_list
[i
]->sink_cap
= cap
;
6994 port
->port_source_caps
= port
->pd_list
[0]->source_cap
;
6995 port
->port_sink_caps
= port
->pd_list
[0]->sink_cap
;
6996 port
->selected_pd
= port
->pds
[0];
7000 tcpm_port_unregister_pd(port
);
7005 static int tcpm_fw_get_caps(struct tcpm_port
*port
, struct fwnode_handle
*fwnode
)
7007 struct fwnode_handle
*capabilities
, *child
, *caps
= NULL
;
7008 unsigned int nr_src_pdo
, nr_snk_pdo
;
7009 const char *opmode_str
;
7010 u32
*src_pdo
, *snk_pdo
;
7011 u32 uw
, frs_current
;
7019 * This fwnode has a "compatible" property, but is never populated as a
7020 * struct device. Instead we simply parse it to read the properties.
7021 * This it breaks fw_devlink=on. To maintain backward compatibility
7022 * with existing DT files, we work around this by deleting any
7023 * fwnode_links to/from this fwnode.
7025 fw_devlink_purge_absent_suppliers(fwnode
);
7027 ret
= typec_get_fw_cap(&port
->typec_caps
, fwnode
);
7033 if (fwnode_property_read_bool(fwnode
, "accessory-mode-audio"))
7034 port
->typec_caps
.accessory
[mode
++] = TYPEC_ACCESSORY_AUDIO
;
7036 if (fwnode_property_read_bool(fwnode
, "accessory-mode-debug"))
7037 port
->typec_caps
.accessory
[mode
++] = TYPEC_ACCESSORY_DEBUG
;
7039 port
->port_type
= port
->typec_caps
.type
;
7040 port
->pd_supported
= !fwnode_property_read_bool(fwnode
, "pd-disable");
7041 port
->slow_charger_loop
= fwnode_property_read_bool(fwnode
, "slow-charger-loop");
7042 port
->self_powered
= fwnode_property_read_bool(fwnode
, "self-powered");
7044 if (!port
->pd_supported
) {
7045 ret
= fwnode_property_read_string(fwnode
, "typec-power-opmode", &opmode_str
);
7048 ret
= typec_find_pwr_opmode(opmode_str
);
7051 port
->src_rp
= tcpm_pwr_opmode_to_rp(ret
);
7055 /* The following code are applicable to pd-capable ports, i.e. pd_supported is true. */
7057 /* FRS can only be supported by DRP ports */
7058 if (port
->port_type
== TYPEC_PORT_DRP
) {
7059 ret
= fwnode_property_read_u32(fwnode
, "new-source-frs-typec-current",
7061 if (!ret
&& frs_current
<= FRS_5V_3A
)
7062 port
->new_source_frs_current
= frs_current
;
7068 /* For the backward compatibility, "capabilities" node is optional. */
7069 capabilities
= fwnode_get_named_child_node(fwnode
, "capabilities");
7070 if (!capabilities
) {
7073 fwnode_for_each_child_node(capabilities
, child
)
7076 if (!port
->pd_count
) {
7078 goto put_capabilities
;
7082 port
->pds
= devm_kcalloc(port
->dev
, port
->pd_count
, sizeof(struct usb_power_delivery
*),
7086 goto put_capabilities
;
7089 port
->pd_list
= devm_kcalloc(port
->dev
, port
->pd_count
, sizeof(struct pd_data
*),
7091 if (!port
->pd_list
) {
7093 goto put_capabilities
;
7096 for (i
= 0; i
< port
->pd_count
; i
++) {
7097 port
->pd_list
[i
] = devm_kzalloc(port
->dev
, sizeof(struct pd_data
), GFP_KERNEL
);
7098 if (!port
->pd_list
[i
]) {
7100 goto put_capabilities
;
7103 src_pdo
= port
->pd_list
[i
]->source_desc
.pdo
;
7104 port
->pd_list
[i
]->source_desc
.role
= TYPEC_SOURCE
;
7105 snk_pdo
= port
->pd_list
[i
]->sink_desc
.pdo
;
7106 port
->pd_list
[i
]->sink_desc
.role
= TYPEC_SINK
;
7108 /* If "capabilities" is NULL, fall back to single pd cap population. */
7112 caps
= fwnode_get_next_child_node(capabilities
, caps
);
7114 if (port
->port_type
!= TYPEC_PORT_SNK
) {
7115 ret
= fwnode_property_count_u32(caps
, "source-pdos");
7123 nr_src_pdo
= min(ret
, PDO_MAX_OBJECTS
);
7124 ret
= fwnode_property_read_u32_array(caps
, "source-pdos", src_pdo
,
7129 ret
= tcpm_validate_caps(port
, src_pdo
, nr_src_pdo
);
7134 port
->nr_src_pdo
= nr_src_pdo
;
7135 memcpy_and_pad(port
->src_pdo
, sizeof(u32
) * PDO_MAX_OBJECTS
,
7136 port
->pd_list
[0]->source_desc
.pdo
,
7137 sizeof(u32
) * nr_src_pdo
,
7142 if (port
->port_type
!= TYPEC_PORT_SRC
) {
7143 ret
= fwnode_property_count_u32(caps
, "sink-pdos");
7152 nr_snk_pdo
= min(ret
, PDO_MAX_OBJECTS
);
7153 ret
= fwnode_property_read_u32_array(caps
, "sink-pdos", snk_pdo
,
7158 ret
= tcpm_validate_caps(port
, snk_pdo
, nr_snk_pdo
);
7162 if (fwnode_property_read_u32(caps
, "op-sink-microwatt", &uw
) < 0) {
7167 port
->pd_list
[i
]->operating_snk_mw
= uw
/ 1000;
7170 port
->nr_snk_pdo
= nr_snk_pdo
;
7171 memcpy_and_pad(port
->snk_pdo
, sizeof(u32
) * PDO_MAX_OBJECTS
,
7172 port
->pd_list
[0]->sink_desc
.pdo
,
7173 sizeof(u32
) * nr_snk_pdo
,
7175 port
->operating_snk_mw
= port
->pd_list
[0]->operating_snk_mw
;
7182 fwnode_handle_put(caps
);
7184 fwnode_handle_put(capabilities
);
7188 static int tcpm_fw_get_snk_vdos(struct tcpm_port
*port
, struct fwnode_handle
*fwnode
)
7192 /* sink-vdos is optional */
7193 ret
= fwnode_property_count_u32(fwnode
, "sink-vdos");
7197 port
->nr_snk_vdo
= min(ret
, VDO_MAX_OBJECTS
);
7198 if (port
->nr_snk_vdo
) {
7199 ret
= fwnode_property_read_u32_array(fwnode
, "sink-vdos",
7206 /* If sink-vdos is found, sink-vdos-v1 is expected for backward compatibility. */
7207 if (port
->nr_snk_vdo
) {
7208 ret
= fwnode_property_count_u32(fwnode
, "sink-vdos-v1");
7214 port
->nr_snk_vdo_v1
= min(ret
, VDO_MAX_OBJECTS
);
7215 ret
= fwnode_property_read_u32_array(fwnode
, "sink-vdos-v1",
7217 port
->nr_snk_vdo_v1
);
7225 /* Power Supply access to expose source power information */
7226 enum tcpm_psy_online_states
{
7227 TCPM_PSY_OFFLINE
= 0,
7228 TCPM_PSY_FIXED_ONLINE
,
7229 TCPM_PSY_PROG_ONLINE
,
7232 static enum power_supply_property tcpm_psy_props
[] = {
7233 POWER_SUPPLY_PROP_USB_TYPE
,
7234 POWER_SUPPLY_PROP_ONLINE
,
7235 POWER_SUPPLY_PROP_VOLTAGE_MIN
,
7236 POWER_SUPPLY_PROP_VOLTAGE_MAX
,
7237 POWER_SUPPLY_PROP_VOLTAGE_NOW
,
7238 POWER_SUPPLY_PROP_CURRENT_MAX
,
7239 POWER_SUPPLY_PROP_CURRENT_NOW
,
7242 static int tcpm_psy_get_online(struct tcpm_port
*port
,
7243 union power_supply_propval
*val
)
7245 if (port
->vbus_charge
) {
7246 if (port
->pps_data
.active
)
7247 val
->intval
= TCPM_PSY_PROG_ONLINE
;
7249 val
->intval
= TCPM_PSY_FIXED_ONLINE
;
7251 val
->intval
= TCPM_PSY_OFFLINE
;
7257 static int tcpm_psy_get_voltage_min(struct tcpm_port
*port
,
7258 union power_supply_propval
*val
)
7260 if (port
->pps_data
.active
)
7261 val
->intval
= port
->pps_data
.min_volt
* 1000;
7263 val
->intval
= port
->supply_voltage
* 1000;
7268 static int tcpm_psy_get_voltage_max(struct tcpm_port
*port
,
7269 union power_supply_propval
*val
)
7271 if (port
->pps_data
.active
)
7272 val
->intval
= port
->pps_data
.max_volt
* 1000;
7274 val
->intval
= port
->supply_voltage
* 1000;
7279 static int tcpm_psy_get_voltage_now(struct tcpm_port
*port
,
7280 union power_supply_propval
*val
)
7282 val
->intval
= port
->supply_voltage
* 1000;
7287 static int tcpm_psy_get_current_max(struct tcpm_port
*port
,
7288 union power_supply_propval
*val
)
7290 if (port
->pps_data
.active
)
7291 val
->intval
= port
->pps_data
.max_curr
* 1000;
7293 val
->intval
= port
->current_limit
* 1000;
7298 static int tcpm_psy_get_current_now(struct tcpm_port
*port
,
7299 union power_supply_propval
*val
)
7301 val
->intval
= port
->current_limit
* 1000;
7306 static int tcpm_psy_get_input_power_limit(struct tcpm_port
*port
,
7307 union power_supply_propval
*val
)
7309 unsigned int src_mv
, src_ma
, max_src_uw
= 0;
7310 unsigned int i
, tmp
;
7312 for (i
= 0; i
< port
->nr_source_caps
; i
++) {
7313 u32 pdo
= port
->source_caps
[i
];
7315 if (pdo_type(pdo
) == PDO_TYPE_FIXED
) {
7316 src_mv
= pdo_fixed_voltage(pdo
);
7317 src_ma
= pdo_max_current(pdo
);
7318 tmp
= src_mv
* src_ma
;
7319 max_src_uw
= tmp
> max_src_uw
? tmp
: max_src_uw
;
7323 val
->intval
= max_src_uw
;
7327 static int tcpm_psy_get_prop(struct power_supply
*psy
,
7328 enum power_supply_property psp
,
7329 union power_supply_propval
*val
)
7331 struct tcpm_port
*port
= power_supply_get_drvdata(psy
);
7335 case POWER_SUPPLY_PROP_USB_TYPE
:
7336 val
->intval
= port
->usb_type
;
7338 case POWER_SUPPLY_PROP_ONLINE
:
7339 ret
= tcpm_psy_get_online(port
, val
);
7341 case POWER_SUPPLY_PROP_VOLTAGE_MIN
:
7342 ret
= tcpm_psy_get_voltage_min(port
, val
);
7344 case POWER_SUPPLY_PROP_VOLTAGE_MAX
:
7345 ret
= tcpm_psy_get_voltage_max(port
, val
);
7347 case POWER_SUPPLY_PROP_VOLTAGE_NOW
:
7348 ret
= tcpm_psy_get_voltage_now(port
, val
);
7350 case POWER_SUPPLY_PROP_CURRENT_MAX
:
7351 ret
= tcpm_psy_get_current_max(port
, val
);
7353 case POWER_SUPPLY_PROP_CURRENT_NOW
:
7354 ret
= tcpm_psy_get_current_now(port
, val
);
7356 case POWER_SUPPLY_PROP_INPUT_POWER_LIMIT
:
7357 tcpm_psy_get_input_power_limit(port
, val
);
7367 static int tcpm_psy_set_online(struct tcpm_port
*port
,
7368 const union power_supply_propval
*val
)
7372 switch (val
->intval
) {
7373 case TCPM_PSY_FIXED_ONLINE
:
7374 ret
= tcpm_pps_activate(port
, false);
7376 case TCPM_PSY_PROG_ONLINE
:
7377 ret
= tcpm_pps_activate(port
, true);
7387 static int tcpm_psy_set_prop(struct power_supply
*psy
,
7388 enum power_supply_property psp
,
7389 const union power_supply_propval
*val
)
7391 struct tcpm_port
*port
= power_supply_get_drvdata(psy
);
7395 * All the properties below are related to USB PD. The check needs to be
7396 * property specific when a non-pd related property is added.
7398 if (!port
->pd_supported
)
7402 case POWER_SUPPLY_PROP_ONLINE
:
7403 ret
= tcpm_psy_set_online(port
, val
);
7405 case POWER_SUPPLY_PROP_VOLTAGE_NOW
:
7406 ret
= tcpm_pps_set_out_volt(port
, val
->intval
/ 1000);
7408 case POWER_SUPPLY_PROP_CURRENT_NOW
:
7409 if (val
->intval
> port
->pps_data
.max_curr
* 1000)
7412 ret
= tcpm_pps_set_op_curr(port
, val
->intval
/ 1000);
7418 power_supply_changed(port
->psy
);
7422 static int tcpm_psy_prop_writeable(struct power_supply
*psy
,
7423 enum power_supply_property psp
)
7426 case POWER_SUPPLY_PROP_ONLINE
:
7427 case POWER_SUPPLY_PROP_VOLTAGE_NOW
:
7428 case POWER_SUPPLY_PROP_CURRENT_NOW
:
7435 static enum power_supply_usb_type tcpm_psy_usb_types
[] = {
7436 POWER_SUPPLY_USB_TYPE_C
,
7437 POWER_SUPPLY_USB_TYPE_PD
,
7438 POWER_SUPPLY_USB_TYPE_PD_PPS
,
7441 static const char *tcpm_psy_name_prefix
= "tcpm-source-psy-";
7443 static int devm_tcpm_psy_register(struct tcpm_port
*port
)
7445 struct power_supply_config psy_cfg
= {};
7446 const char *port_dev_name
= dev_name(port
->dev
);
7447 size_t psy_name_len
= strlen(tcpm_psy_name_prefix
) +
7448 strlen(port_dev_name
) + 1;
7451 psy_cfg
.drv_data
= port
;
7452 psy_cfg
.fwnode
= dev_fwnode(port
->dev
);
7453 psy_name
= devm_kzalloc(port
->dev
, psy_name_len
, GFP_KERNEL
);
7457 snprintf(psy_name
, psy_name_len
, "%s%s", tcpm_psy_name_prefix
,
7459 port
->psy_desc
.name
= psy_name
;
7460 port
->psy_desc
.type
= POWER_SUPPLY_TYPE_USB
;
7461 port
->psy_desc
.usb_types
= tcpm_psy_usb_types
;
7462 port
->psy_desc
.num_usb_types
= ARRAY_SIZE(tcpm_psy_usb_types
);
7463 port
->psy_desc
.properties
= tcpm_psy_props
;
7464 port
->psy_desc
.num_properties
= ARRAY_SIZE(tcpm_psy_props
);
7465 port
->psy_desc
.get_property
= tcpm_psy_get_prop
;
7466 port
->psy_desc
.set_property
= tcpm_psy_set_prop
;
7467 port
->psy_desc
.property_is_writeable
= tcpm_psy_prop_writeable
;
7469 port
->usb_type
= POWER_SUPPLY_USB_TYPE_C
;
7471 port
->psy
= devm_power_supply_register(port
->dev
, &port
->psy_desc
,
7474 return PTR_ERR_OR_ZERO(port
->psy
);
7477 static enum hrtimer_restart
state_machine_timer_handler(struct hrtimer
*timer
)
7479 struct tcpm_port
*port
= container_of(timer
, struct tcpm_port
, state_machine_timer
);
7481 if (port
->registered
)
7482 kthread_queue_work(port
->wq
, &port
->state_machine
);
7483 return HRTIMER_NORESTART
;
7486 static enum hrtimer_restart
vdm_state_machine_timer_handler(struct hrtimer
*timer
)
7488 struct tcpm_port
*port
= container_of(timer
, struct tcpm_port
, vdm_state_machine_timer
);
7490 if (port
->registered
)
7491 kthread_queue_work(port
->wq
, &port
->vdm_state_machine
);
7492 return HRTIMER_NORESTART
;
7495 static enum hrtimer_restart
enable_frs_timer_handler(struct hrtimer
*timer
)
7497 struct tcpm_port
*port
= container_of(timer
, struct tcpm_port
, enable_frs_timer
);
7499 if (port
->registered
)
7500 kthread_queue_work(port
->wq
, &port
->enable_frs
);
7501 return HRTIMER_NORESTART
;
7504 static enum hrtimer_restart
send_discover_timer_handler(struct hrtimer
*timer
)
7506 struct tcpm_port
*port
= container_of(timer
, struct tcpm_port
, send_discover_timer
);
7508 if (port
->registered
)
7509 kthread_queue_work(port
->wq
, &port
->send_discover_work
);
7510 return HRTIMER_NORESTART
;
7513 struct tcpm_port
*tcpm_register_port(struct device
*dev
, struct tcpc_dev
*tcpc
)
7515 struct tcpm_port
*port
;
7518 if (!dev
|| !tcpc
||
7519 !tcpc
->get_vbus
|| !tcpc
->set_cc
|| !tcpc
->get_cc
||
7520 !tcpc
->set_polarity
|| !tcpc
->set_vconn
|| !tcpc
->set_vbus
||
7521 !tcpc
->set_pd_rx
|| !tcpc
->set_roles
|| !tcpc
->pd_transmit
)
7522 return ERR_PTR(-EINVAL
);
7524 port
= devm_kzalloc(dev
, sizeof(*port
), GFP_KERNEL
);
7526 return ERR_PTR(-ENOMEM
);
7531 mutex_init(&port
->lock
);
7532 mutex_init(&port
->swap_lock
);
7534 port
->wq
= kthread_create_worker(0, dev_name(dev
));
7535 if (IS_ERR(port
->wq
))
7536 return ERR_CAST(port
->wq
);
7537 sched_set_fifo(port
->wq
->task
);
7539 kthread_init_work(&port
->state_machine
, tcpm_state_machine_work
);
7540 kthread_init_work(&port
->vdm_state_machine
, vdm_state_machine_work
);
7541 kthread_init_work(&port
->event_work
, tcpm_pd_event_handler
);
7542 kthread_init_work(&port
->enable_frs
, tcpm_enable_frs_work
);
7543 kthread_init_work(&port
->send_discover_work
, tcpm_send_discover_work
);
7544 hrtimer_init(&port
->state_machine_timer
, CLOCK_MONOTONIC
, HRTIMER_MODE_REL
);
7545 port
->state_machine_timer
.function
= state_machine_timer_handler
;
7546 hrtimer_init(&port
->vdm_state_machine_timer
, CLOCK_MONOTONIC
, HRTIMER_MODE_REL
);
7547 port
->vdm_state_machine_timer
.function
= vdm_state_machine_timer_handler
;
7548 hrtimer_init(&port
->enable_frs_timer
, CLOCK_MONOTONIC
, HRTIMER_MODE_REL
);
7549 port
->enable_frs_timer
.function
= enable_frs_timer_handler
;
7550 hrtimer_init(&port
->send_discover_timer
, CLOCK_MONOTONIC
, HRTIMER_MODE_REL
);
7551 port
->send_discover_timer
.function
= send_discover_timer_handler
;
7553 spin_lock_init(&port
->pd_event_lock
);
7555 init_completion(&port
->tx_complete
);
7556 init_completion(&port
->swap_complete
);
7557 init_completion(&port
->pps_complete
);
7558 tcpm_debugfs_init(port
);
7560 err
= tcpm_fw_get_caps(port
, tcpc
->fwnode
);
7562 goto out_destroy_wq
;
7563 err
= tcpm_fw_get_snk_vdos(port
, tcpc
->fwnode
);
7565 goto out_destroy_wq
;
7567 port
->try_role
= port
->typec_caps
.prefer_role
;
7569 port
->typec_caps
.revision
= 0x0120; /* Type-C spec release 1.2 */
7570 port
->typec_caps
.pd_revision
= 0x0300; /* USB-PD spec release 3.0 */
7571 port
->typec_caps
.svdm_version
= SVDM_VER_2_0
;
7572 port
->typec_caps
.driver_data
= port
;
7573 port
->typec_caps
.ops
= &tcpm_ops
;
7574 port
->typec_caps
.orientation_aware
= 1;
7576 port
->partner_desc
.identity
= &port
->partner_ident
;
7578 port
->role_sw
= usb_role_switch_get(port
->dev
);
7580 port
->role_sw
= fwnode_usb_role_switch_get(tcpc
->fwnode
);
7581 if (IS_ERR(port
->role_sw
)) {
7582 err
= PTR_ERR(port
->role_sw
);
7583 goto out_destroy_wq
;
7586 err
= devm_tcpm_psy_register(port
);
7588 goto out_role_sw_put
;
7589 power_supply_changed(port
->psy
);
7591 err
= tcpm_port_register_pd(port
);
7593 goto out_role_sw_put
;
7596 port
->typec_caps
.pd
= port
->pds
[0];
7598 port
->typec_port
= typec_register_port(port
->dev
, &port
->typec_caps
);
7599 if (IS_ERR(port
->typec_port
)) {
7600 err
= PTR_ERR(port
->typec_port
);
7601 goto out_unregister_pd
;
7604 typec_port_register_altmodes(port
->typec_port
,
7605 &tcpm_altmode_ops
, port
,
7606 port
->port_altmode
, ALTMODE_DISCOVERY_MAX
);
7607 typec_port_register_cable_ops(port
->port_altmode
, ARRAY_SIZE(port
->port_altmode
),
7609 port
->registered
= true;
7611 mutex_lock(&port
->lock
);
7613 mutex_unlock(&port
->lock
);
7615 tcpm_log(port
, "%s: registered", dev_name(dev
));
7619 tcpm_port_unregister_pd(port
);
7621 usb_role_switch_put(port
->role_sw
);
7623 tcpm_debugfs_exit(port
);
7624 kthread_destroy_worker(port
->wq
);
7625 return ERR_PTR(err
);
7627 EXPORT_SYMBOL_GPL(tcpm_register_port
);
7629 void tcpm_unregister_port(struct tcpm_port
*port
)
7633 port
->registered
= false;
7634 kthread_destroy_worker(port
->wq
);
7636 hrtimer_cancel(&port
->send_discover_timer
);
7637 hrtimer_cancel(&port
->enable_frs_timer
);
7638 hrtimer_cancel(&port
->vdm_state_machine_timer
);
7639 hrtimer_cancel(&port
->state_machine_timer
);
7641 tcpm_reset_port(port
);
7643 tcpm_port_unregister_pd(port
);
7645 for (i
= 0; i
< ARRAY_SIZE(port
->port_altmode
); i
++)
7646 typec_unregister_altmode(port
->port_altmode
[i
]);
7647 typec_unregister_port(port
->typec_port
);
7648 usb_role_switch_put(port
->role_sw
);
7649 tcpm_debugfs_exit(port
);
7651 EXPORT_SYMBOL_GPL(tcpm_unregister_port
);
7653 MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>");
7654 MODULE_DESCRIPTION("USB Type-C Port Manager");
7655 MODULE_LICENSE("GPL");