1 // SPDX-License-Identifier: GPL-2.0
3 * USB Type-C Connector System Software Interface driver
5 * Copyright (C) 2017, Intel Corporation
9 #include <linux/completion.h>
10 #include <linux/property.h>
11 #include <linux/device.h>
12 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/slab.h>
15 #include <linux/usb/typec_dp.h>
21 * UCSI_TIMEOUT_MS - PPM communication timeout
23 * Ideally we could use MIN_TIME_TO_RESPOND_WITH_BUSY (which is defined in UCSI
24 * specification) here as reference, but unfortunately we can't. It is very
25 * difficult to estimate the time it takes for the system to process the command
26 * before it is actually passed to the PPM.
28 #define UCSI_TIMEOUT_MS 5000
31 * UCSI_SWAP_TIMEOUT_MS - Timeout for role swap requests
33 * 5 seconds is close to the time it takes for CapsCounter to reach 0, so even
34 * if the PPM does not generate Connector Change events before that with
35 * partners that do not support USB Power Delivery, this should still work.
37 #define UCSI_SWAP_TIMEOUT_MS 5000
39 static int ucsi_acknowledge_command(struct ucsi *ucsi)
43 ctrl = UCSI_ACK_CC_CI;
44 ctrl |= UCSI_ACK_COMMAND_COMPLETE;
46 return ucsi->ops->sync_write(ucsi, UCSI_CONTROL, &ctrl, sizeof(ctrl));
49 static int ucsi_acknowledge_connector_change(struct ucsi *ucsi)
53 ctrl = UCSI_ACK_CC_CI;
54 ctrl |= UCSI_ACK_CONNECTOR_CHANGE;
56 return ucsi->ops->async_write(ucsi, UCSI_CONTROL, &ctrl, sizeof(ctrl));
59 static int ucsi_exec_command(struct ucsi *ucsi, u64 command);
61 static int ucsi_read_error(struct ucsi *ucsi)
66 /* Acknowlege the command that failed */
67 ret = ucsi_acknowledge_command(ucsi);
71 ret = ucsi_exec_command(ucsi, UCSI_GET_ERROR_STATUS);
75 ret = ucsi->ops->read(ucsi, UCSI_MESSAGE_IN, &error, sizeof(error));
80 case UCSI_ERROR_INCOMPATIBLE_PARTNER:
82 case UCSI_ERROR_CC_COMMUNICATION_ERR:
84 case UCSI_ERROR_CONTRACT_NEGOTIATION_FAIL:
86 case UCSI_ERROR_DEAD_BATTERY:
87 dev_warn(ucsi->dev, "Dead battery condition!\n");
89 case UCSI_ERROR_INVALID_CON_NUM:
90 case UCSI_ERROR_UNREGONIZED_CMD:
91 case UCSI_ERROR_INVALID_CMD_ARGUMENT:
92 dev_err(ucsi->dev, "possible UCSI driver bug %u\n", error);
94 case UCSI_ERROR_OVERCURRENT:
95 dev_warn(ucsi->dev, "Overcurrent condition\n");
97 case UCSI_ERROR_PARTNER_REJECTED_SWAP:
98 dev_warn(ucsi->dev, "Partner rejected swap\n");
100 case UCSI_ERROR_HARD_RESET:
101 dev_warn(ucsi->dev, "Hard reset occurred\n");
103 case UCSI_ERROR_PPM_POLICY_CONFLICT:
104 dev_warn(ucsi->dev, "PPM Policy conflict\n");
106 case UCSI_ERROR_SWAP_REJECTED:
107 dev_warn(ucsi->dev, "Swap rejected\n");
109 case UCSI_ERROR_UNDEFINED:
111 dev_err(ucsi->dev, "unknown error %u\n", error);
118 static int ucsi_exec_command(struct ucsi *ucsi, u64 cmd)
123 ret = ucsi->ops->sync_write(ucsi, UCSI_CONTROL, &cmd, sizeof(cmd));
127 ret = ucsi->ops->read(ucsi, UCSI_CCI, &cci, sizeof(cci));
131 if (cci & UCSI_CCI_BUSY)
134 if (!(cci & UCSI_CCI_COMMAND_COMPLETE))
137 if (cci & UCSI_CCI_NOT_SUPPORTED)
140 if (cci & UCSI_CCI_ERROR) {
141 if (cmd == UCSI_GET_ERROR_STATUS)
143 return ucsi_read_error(ucsi);
146 return UCSI_CCI_LENGTH(cci);
149 int ucsi_send_command(struct ucsi *ucsi, u64 command,
150 void *data, size_t size)
155 mutex_lock(&ucsi->ppm_lock);
157 ret = ucsi_exec_command(ucsi, command);
164 ret = ucsi->ops->read(ucsi, UCSI_MESSAGE_IN, data, size);
169 ret = ucsi_acknowledge_command(ucsi);
175 mutex_unlock(&ucsi->ppm_lock);
178 EXPORT_SYMBOL_GPL(ucsi_send_command);
180 int ucsi_resume(struct ucsi *ucsi)
184 /* Restore UCSI notification enable mask after system resume */
185 command = UCSI_SET_NOTIFICATION_ENABLE | ucsi->ntfy;
187 return ucsi_send_command(ucsi, command, NULL, 0);
189 EXPORT_SYMBOL_GPL(ucsi_resume);
190 /* -------------------------------------------------------------------------- */
192 void ucsi_altmode_update_active(struct ucsi_connector *con)
194 const struct typec_altmode *altmode = NULL;
200 command = UCSI_GET_CURRENT_CAM | UCSI_CONNECTOR_NUMBER(con->num);
201 ret = ucsi_send_command(con->ucsi, command, &cur, sizeof(cur));
203 if (con->ucsi->version > 0x0100) {
204 dev_err(con->ucsi->dev,
205 "GET_CURRENT_CAM command failed\n");
211 if (cur < UCSI_MAX_ALTMODES)
212 altmode = typec_altmode_get_partner(con->port_altmode[cur]);
214 for (i = 0; con->partner_altmode[i]; i++)
215 typec_altmode_update_active(con->partner_altmode[i],
216 con->partner_altmode[i] == altmode);
219 static int ucsi_altmode_next_mode(struct typec_altmode **alt, u16 svid)
224 for (i = 0; alt[i]; i++) {
225 if (i > MODE_DISCOVERY_MAX)
228 if (alt[i]->svid == svid)
235 static int ucsi_next_altmode(struct typec_altmode **alt)
239 for (i = 0; i < UCSI_MAX_ALTMODES; i++)
246 static int ucsi_register_altmode(struct ucsi_connector *con,
247 struct typec_altmode_desc *desc,
250 struct typec_altmode *alt;
255 override = !!(con->ucsi->cap.features & UCSI_CAP_ALT_MODE_OVERRIDE);
258 case UCSI_RECIPIENT_CON:
259 i = ucsi_next_altmode(con->port_altmode);
265 ret = ucsi_altmode_next_mode(con->port_altmode, desc->svid);
271 switch (desc->svid) {
272 case USB_TYPEC_DP_SID:
273 alt = ucsi_register_displayport(con, override, i, desc);
275 case USB_TYPEC_NVIDIA_VLINK_SID:
276 if (desc->vdo == USB_TYPEC_NVIDIA_VLINK_DBG_VDO)
277 alt = typec_port_register_altmode(con->port,
280 alt = ucsi_register_displayport(con, override,
284 alt = typec_port_register_altmode(con->port, desc);
293 con->port_altmode[i] = alt;
295 case UCSI_RECIPIENT_SOP:
296 i = ucsi_next_altmode(con->partner_altmode);
302 ret = ucsi_altmode_next_mode(con->partner_altmode, desc->svid);
308 alt = typec_partner_register_altmode(con->partner, desc);
314 con->partner_altmode[i] = alt;
320 trace_ucsi_register_altmode(recipient, alt);
325 dev_err(con->ucsi->dev, "failed to registers svid 0x%04x mode %d\n",
326 desc->svid, desc->mode);
332 ucsi_register_altmodes_nvidia(struct ucsi_connector *con, u8 recipient)
334 int max_altmodes = UCSI_MAX_ALTMODES;
335 struct typec_altmode_desc desc;
336 struct ucsi_altmode alt;
337 struct ucsi_altmode orig[UCSI_MAX_ALTMODES];
338 struct ucsi_altmode updated[UCSI_MAX_ALTMODES];
339 struct ucsi *ucsi = con->ucsi;
340 bool multi_dp = false;
347 if (recipient == UCSI_RECIPIENT_CON)
348 max_altmodes = con->ucsi->cap.num_alt_modes;
350 memset(orig, 0, sizeof(orig));
351 memset(updated, 0, sizeof(updated));
353 /* First get all the alternate modes */
354 for (i = 0; i < max_altmodes; i++) {
355 memset(&alt, 0, sizeof(alt));
356 command = UCSI_GET_ALTERNATE_MODES;
357 command |= UCSI_GET_ALTMODE_RECIPIENT(recipient);
358 command |= UCSI_GET_ALTMODE_CONNECTOR_NUMBER(con->num);
359 command |= UCSI_GET_ALTMODE_OFFSET(i);
360 len = ucsi_send_command(con->ucsi, command, &alt, sizeof(alt));
362 * We are collecting all altmodes first and then registering.
363 * Some type-C device will return zero length data beyond last
364 * alternate modes. We should not return if length is zero.
369 /* We got all altmodes, now break out and register them */
370 if (!len || !alt.svid)
373 orig[k].mid = alt.mid;
374 orig[k].svid = alt.svid;
378 * Update the original altmode table as some ppms may report
379 * multiple DP altmodes.
381 if (recipient == UCSI_RECIPIENT_CON)
382 multi_dp = ucsi->ops->update_altmodes(ucsi, orig, updated);
384 /* now register altmodes */
385 for (i = 0; i < max_altmodes; i++) {
386 memset(&desc, 0, sizeof(desc));
387 if (multi_dp && recipient == UCSI_RECIPIENT_CON) {
388 desc.svid = updated[i].svid;
389 desc.vdo = updated[i].mid;
391 desc.svid = orig[i].svid;
392 desc.vdo = orig[i].mid;
394 desc.roles = TYPEC_PORT_DRD;
399 ret = ucsi_register_altmode(con, &desc, recipient);
407 static int ucsi_register_altmodes(struct ucsi_connector *con, u8 recipient)
409 int max_altmodes = UCSI_MAX_ALTMODES;
410 struct typec_altmode_desc desc;
411 struct ucsi_altmode alt[2];
419 if (!(con->ucsi->cap.features & UCSI_CAP_ALT_MODE_DETAILS))
422 if (recipient == UCSI_RECIPIENT_SOP && con->partner_altmode[0])
425 if (con->ucsi->ops->update_altmodes)
426 return ucsi_register_altmodes_nvidia(con, recipient);
428 if (recipient == UCSI_RECIPIENT_CON)
429 max_altmodes = con->ucsi->cap.num_alt_modes;
431 for (i = 0; i < max_altmodes;) {
432 memset(alt, 0, sizeof(alt));
433 command = UCSI_GET_ALTERNATE_MODES;
434 command |= UCSI_GET_ALTMODE_RECIPIENT(recipient);
435 command |= UCSI_GET_ALTMODE_CONNECTOR_NUMBER(con->num);
436 command |= UCSI_GET_ALTMODE_OFFSET(i);
437 len = ucsi_send_command(con->ucsi, command, alt, sizeof(alt));
442 * This code is requesting one alt mode at a time, but some PPMs
443 * may still return two. If that happens both alt modes need be
444 * registered and the offset for the next alt mode has to be
447 num = len / sizeof(alt[0]);
450 for (j = 0; j < num; j++) {
454 memset(&desc, 0, sizeof(desc));
455 desc.vdo = alt[j].mid;
456 desc.svid = alt[j].svid;
457 desc.roles = TYPEC_PORT_DRD;
459 ret = ucsi_register_altmode(con, &desc, recipient);
468 static void ucsi_unregister_altmodes(struct ucsi_connector *con, u8 recipient)
470 const struct typec_altmode *pdev;
471 struct typec_altmode **adev;
475 case UCSI_RECIPIENT_CON:
476 adev = con->port_altmode;
478 case UCSI_RECIPIENT_SOP:
479 adev = con->partner_altmode;
486 if (recipient == UCSI_RECIPIENT_SOP &&
487 (adev[i]->svid == USB_TYPEC_DP_SID ||
488 (adev[i]->svid == USB_TYPEC_NVIDIA_VLINK_SID &&
489 adev[i]->vdo != USB_TYPEC_NVIDIA_VLINK_DBG_VDO))) {
490 pdev = typec_altmode_get_partner(adev[i]);
491 ucsi_displayport_remove_partner((void *)pdev);
493 typec_unregister_altmode(adev[i]);
498 static void ucsi_get_pdos(struct ucsi_connector *con, int is_partner)
500 struct ucsi *ucsi = con->ucsi;
504 command = UCSI_COMMAND(UCSI_GET_PDOS) | UCSI_CONNECTOR_NUMBER(con->num);
505 command |= UCSI_GET_PDOS_PARTNER_PDO(is_partner);
506 command |= UCSI_GET_PDOS_NUM_PDOS(UCSI_MAX_PDOS - 1);
507 command |= UCSI_GET_PDOS_SRC_PDOS;
508 ret = ucsi_send_command(ucsi, command, con->src_pdos,
509 sizeof(con->src_pdos));
511 dev_err(ucsi->dev, "UCSI_GET_PDOS failed (%d)\n", ret);
514 con->num_pdos = ret / sizeof(u32); /* number of bytes to 32-bit PDOs */
516 dev_warn(ucsi->dev, "UCSI_GET_PDOS returned 0 bytes\n");
519 static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
521 switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) {
522 case UCSI_CONSTAT_PWR_OPMODE_PD:
523 con->rdo = con->status.request_data_obj;
524 typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_PD);
525 ucsi_get_pdos(con, 1);
527 case UCSI_CONSTAT_PWR_OPMODE_TYPEC1_5:
529 typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_1_5A);
531 case UCSI_CONSTAT_PWR_OPMODE_TYPEC3_0:
533 typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_3_0A);
537 typec_set_pwr_opmode(con->port, TYPEC_PWR_MODE_USB);
542 static int ucsi_register_partner(struct ucsi_connector *con)
544 u8 pwr_opmode = UCSI_CONSTAT_PWR_OPMODE(con->status.flags);
545 struct typec_partner_desc desc;
546 struct typec_partner *partner;
551 memset(&desc, 0, sizeof(desc));
553 switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
554 case UCSI_CONSTAT_PARTNER_TYPE_DEBUG:
555 desc.accessory = TYPEC_ACCESSORY_DEBUG;
557 case UCSI_CONSTAT_PARTNER_TYPE_AUDIO:
558 desc.accessory = TYPEC_ACCESSORY_AUDIO;
564 desc.usb_pd = pwr_opmode == UCSI_CONSTAT_PWR_OPMODE_PD;
566 partner = typec_register_partner(con->port, &desc);
567 if (IS_ERR(partner)) {
568 dev_err(con->ucsi->dev,
569 "con%d: failed to register partner (%ld)\n", con->num,
571 return PTR_ERR(partner);
574 con->partner = partner;
579 static void ucsi_unregister_partner(struct ucsi_connector *con)
584 ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP);
585 typec_unregister_partner(con->partner);
589 static void ucsi_partner_change(struct ucsi_connector *con)
596 switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
597 case UCSI_CONSTAT_PARTNER_TYPE_UFP:
598 case UCSI_CONSTAT_PARTNER_TYPE_CABLE:
599 case UCSI_CONSTAT_PARTNER_TYPE_CABLE_AND_UFP:
600 typec_set_data_role(con->port, TYPEC_HOST);
602 case UCSI_CONSTAT_PARTNER_TYPE_DFP:
603 typec_set_data_role(con->port, TYPEC_DEVICE);
609 /* Complete pending data role swap */
610 if (!completion_done(&con->complete))
611 complete(&con->complete);
613 /* Can't rely on Partner Flags field. Always checking the alt modes. */
614 ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP);
616 dev_err(con->ucsi->dev,
617 "con%d: failed to register partner alternate modes\n",
620 ucsi_altmode_update_active(con);
623 static void ucsi_handle_connector_change(struct work_struct *work)
625 struct ucsi_connector *con = container_of(work, struct ucsi_connector,
627 struct ucsi *ucsi = con->ucsi;
628 enum typec_role role;
632 mutex_lock(&con->lock);
634 command = UCSI_GET_CONNECTOR_STATUS | UCSI_CONNECTOR_NUMBER(con->num);
635 ret = ucsi_send_command(ucsi, command, &con->status,
636 sizeof(con->status));
638 dev_err(ucsi->dev, "%s: GET_CONNECTOR_STATUS failed (%d)\n",
643 role = !!(con->status.flags & UCSI_CONSTAT_PWR_DIR);
645 if (con->status.change & UCSI_CONSTAT_POWER_OPMODE_CHANGE ||
646 con->status.change & UCSI_CONSTAT_POWER_LEVEL_CHANGE) {
647 ucsi_pwr_opmode_change(con);
648 ucsi_port_psy_changed(con);
651 if (con->status.change & UCSI_CONSTAT_POWER_DIR_CHANGE) {
652 typec_set_pwr_role(con->port, role);
654 /* Complete pending power role swap */
655 if (!completion_done(&con->complete))
656 complete(&con->complete);
659 if (con->status.change & UCSI_CONSTAT_CONNECT_CHANGE) {
660 typec_set_pwr_role(con->port, role);
662 switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
663 case UCSI_CONSTAT_PARTNER_TYPE_UFP:
664 case UCSI_CONSTAT_PARTNER_TYPE_CABLE:
665 case UCSI_CONSTAT_PARTNER_TYPE_CABLE_AND_UFP:
666 typec_set_data_role(con->port, TYPEC_HOST);
668 case UCSI_CONSTAT_PARTNER_TYPE_DFP:
669 typec_set_data_role(con->port, TYPEC_DEVICE);
675 if (con->status.flags & UCSI_CONSTAT_CONNECTED)
676 ucsi_register_partner(con);
678 ucsi_unregister_partner(con);
680 ucsi_port_psy_changed(con);
683 if (con->status.change & UCSI_CONSTAT_CAM_CHANGE) {
685 * We don't need to know the currently supported alt modes here.
686 * Running GET_CAM_SUPPORTED command just to make sure the PPM
687 * does not get stuck in case it assumes we do so.
689 command = UCSI_GET_CAM_SUPPORTED;
690 command |= UCSI_CONNECTOR_NUMBER(con->num);
691 ucsi_send_command(con->ucsi, command, NULL, 0);
694 if (con->status.change & UCSI_CONSTAT_PARTNER_CHANGE)
695 ucsi_partner_change(con);
697 ret = ucsi_acknowledge_connector_change(ucsi);
699 dev_err(ucsi->dev, "%s: ACK failed (%d)", __func__, ret);
701 trace_ucsi_connector_change(con->num, &con->status);
704 clear_bit(EVENT_PENDING, &ucsi->flags);
705 mutex_unlock(&con->lock);
709 * ucsi_connector_change - Process Connector Change Event
710 * @ucsi: UCSI Interface
711 * @num: Connector number
713 void ucsi_connector_change(struct ucsi *ucsi, u8 num)
715 struct ucsi_connector *con = &ucsi->connector[num - 1];
717 if (!(ucsi->ntfy & UCSI_ENABLE_NTFY_CONNECTOR_CHANGE)) {
718 dev_dbg(ucsi->dev, "Bogus connector change event\n");
722 if (!test_and_set_bit(EVENT_PENDING, &ucsi->flags))
723 schedule_work(&con->work);
725 EXPORT_SYMBOL_GPL(ucsi_connector_change);
727 /* -------------------------------------------------------------------------- */
729 static int ucsi_reset_connector(struct ucsi_connector *con, bool hard)
733 command = UCSI_CONNECTOR_RESET | UCSI_CONNECTOR_NUMBER(con->num);
734 command |= hard ? UCSI_CONNECTOR_RESET_HARD : 0;
736 return ucsi_send_command(con->ucsi, command, NULL, 0);
739 static int ucsi_reset_ppm(struct ucsi *ucsi)
741 u64 command = UCSI_PPM_RESET;
746 mutex_lock(&ucsi->ppm_lock);
748 ret = ucsi->ops->async_write(ucsi, UCSI_CONTROL, &command,
753 tmo = jiffies + msecs_to_jiffies(UCSI_TIMEOUT_MS);
756 if (time_is_before_jiffies(tmo)) {
761 ret = ucsi->ops->read(ucsi, UCSI_CCI, &cci, sizeof(cci));
765 /* If the PPM is still doing something else, reset it again. */
766 if (cci & ~UCSI_CCI_RESET_COMPLETE) {
767 ret = ucsi->ops->async_write(ucsi, UCSI_CONTROL,
775 } while (!(cci & UCSI_CCI_RESET_COMPLETE));
778 mutex_unlock(&ucsi->ppm_lock);
782 static int ucsi_role_cmd(struct ucsi_connector *con, u64 command)
786 ret = ucsi_send_command(con->ucsi, command, NULL, 0);
787 if (ret == -ETIMEDOUT) {
790 /* PPM most likely stopped responding. Resetting everything. */
791 ucsi_reset_ppm(con->ucsi);
793 c = UCSI_SET_NOTIFICATION_ENABLE | con->ucsi->ntfy;
794 ucsi_send_command(con->ucsi, c, NULL, 0);
796 ucsi_reset_connector(con, true);
802 static int ucsi_dr_swap(struct typec_port *port, enum typec_data_role role)
804 struct ucsi_connector *con = typec_get_drvdata(port);
809 mutex_lock(&con->lock);
816 partner_type = UCSI_CONSTAT_PARTNER_TYPE(con->status.flags);
817 if ((partner_type == UCSI_CONSTAT_PARTNER_TYPE_DFP &&
818 role == TYPEC_DEVICE) ||
819 (partner_type == UCSI_CONSTAT_PARTNER_TYPE_UFP &&
823 command = UCSI_SET_UOR | UCSI_CONNECTOR_NUMBER(con->num);
824 command |= UCSI_SET_UOR_ROLE(role);
825 command |= UCSI_SET_UOR_ACCEPT_ROLE_SWAPS;
826 ret = ucsi_role_cmd(con, command);
830 if (!wait_for_completion_timeout(&con->complete,
831 msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS)))
835 mutex_unlock(&con->lock);
837 return ret < 0 ? ret : 0;
840 static int ucsi_pr_swap(struct typec_port *port, enum typec_role role)
842 struct ucsi_connector *con = typec_get_drvdata(port);
843 enum typec_role cur_role;
847 mutex_lock(&con->lock);
854 cur_role = !!(con->status.flags & UCSI_CONSTAT_PWR_DIR);
856 if (cur_role == role)
859 command = UCSI_SET_PDR | UCSI_CONNECTOR_NUMBER(con->num);
860 command |= UCSI_SET_PDR_ROLE(role);
861 command |= UCSI_SET_PDR_ACCEPT_ROLE_SWAPS;
862 ret = ucsi_role_cmd(con, command);
866 if (!wait_for_completion_timeout(&con->complete,
867 msecs_to_jiffies(UCSI_SWAP_TIMEOUT_MS))) {
872 /* Something has gone wrong while swapping the role */
873 if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) !=
874 UCSI_CONSTAT_PWR_OPMODE_PD) {
875 ucsi_reset_connector(con, true);
880 mutex_unlock(&con->lock);
885 static const struct typec_operations ucsi_ops = {
886 .dr_set = ucsi_dr_swap,
887 .pr_set = ucsi_pr_swap
890 static struct fwnode_handle *ucsi_find_fwnode(struct ucsi_connector *con)
892 struct fwnode_handle *fwnode;
895 device_for_each_child_node(con->ucsi->dev, fwnode)
901 static int ucsi_register_port(struct ucsi *ucsi, int index)
903 struct ucsi_connector *con = &ucsi->connector[index];
904 struct typec_capability *cap = &con->typec_cap;
905 enum typec_accessory *accessory = cap->accessory;
909 INIT_WORK(&con->work, ucsi_handle_connector_change);
910 init_completion(&con->complete);
911 mutex_init(&con->lock);
912 con->num = index + 1;
915 /* Delay other interactions with the con until registration is complete */
916 mutex_lock(&con->lock);
918 /* Get connector capability */
919 command = UCSI_GET_CONNECTOR_CAPABILITY;
920 command |= UCSI_CONNECTOR_NUMBER(con->num);
921 ret = ucsi_send_command(ucsi, command, &con->cap, sizeof(con->cap));
925 if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DRP)
926 cap->data = TYPEC_PORT_DRD;
927 else if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DFP)
928 cap->data = TYPEC_PORT_DFP;
929 else if (con->cap.op_mode & UCSI_CONCAP_OPMODE_UFP)
930 cap->data = TYPEC_PORT_UFP;
932 if ((con->cap.flags & UCSI_CONCAP_FLAG_PROVIDER) &&
933 (con->cap.flags & UCSI_CONCAP_FLAG_CONSUMER))
934 cap->type = TYPEC_PORT_DRP;
935 else if (con->cap.flags & UCSI_CONCAP_FLAG_PROVIDER)
936 cap->type = TYPEC_PORT_SRC;
937 else if (con->cap.flags & UCSI_CONCAP_FLAG_CONSUMER)
938 cap->type = TYPEC_PORT_SNK;
940 cap->revision = ucsi->cap.typec_version;
941 cap->pd_revision = ucsi->cap.pd_version;
942 cap->prefer_role = TYPEC_NO_PREFERRED_ROLE;
944 if (con->cap.op_mode & UCSI_CONCAP_OPMODE_AUDIO_ACCESSORY)
945 *accessory++ = TYPEC_ACCESSORY_AUDIO;
946 if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DEBUG_ACCESSORY)
947 *accessory = TYPEC_ACCESSORY_DEBUG;
949 cap->fwnode = ucsi_find_fwnode(con);
950 cap->driver_data = con;
951 cap->ops = &ucsi_ops;
953 ret = ucsi_register_port_psy(con);
957 /* Register the connector */
958 con->port = typec_register_port(ucsi->dev, cap);
959 if (IS_ERR(con->port)) {
960 ret = PTR_ERR(con->port);
964 /* Alternate modes */
965 ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_CON);
967 dev_err(ucsi->dev, "con%d: failed to register alt modes\n",
973 command = UCSI_GET_CONNECTOR_STATUS | UCSI_CONNECTOR_NUMBER(con->num);
974 ret = ucsi_send_command(ucsi, command, &con->status, sizeof(con->status));
976 dev_err(ucsi->dev, "con%d: failed to get status\n", con->num);
980 ret = 0; /* ucsi_send_command() returns length on success */
982 switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
983 case UCSI_CONSTAT_PARTNER_TYPE_UFP:
984 case UCSI_CONSTAT_PARTNER_TYPE_CABLE:
985 case UCSI_CONSTAT_PARTNER_TYPE_CABLE_AND_UFP:
986 typec_set_data_role(con->port, TYPEC_HOST);
988 case UCSI_CONSTAT_PARTNER_TYPE_DFP:
989 typec_set_data_role(con->port, TYPEC_DEVICE);
995 /* Check if there is already something connected */
996 if (con->status.flags & UCSI_CONSTAT_CONNECTED) {
997 typec_set_pwr_role(con->port,
998 !!(con->status.flags & UCSI_CONSTAT_PWR_DIR));
999 ucsi_pwr_opmode_change(con);
1000 ucsi_register_partner(con);
1001 ucsi_port_psy_changed(con);
1005 ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP);
1008 "con%d: failed to register alternate modes\n",
1012 ucsi_altmode_update_active(con);
1016 trace_ucsi_register_port(con->num, &con->status);
1019 mutex_unlock(&con->lock);
1024 * ucsi_init - Initialize UCSI interface
1025 * @ucsi: UCSI to be initialized
1027 * Registers all ports @ucsi has and enables all notification events.
1029 static int ucsi_init(struct ucsi *ucsi)
1031 struct ucsi_connector *con;
1037 ret = ucsi_reset_ppm(ucsi);
1039 dev_err(ucsi->dev, "failed to reset PPM!\n");
1043 /* Enable basic notifications */
1044 ucsi->ntfy = UCSI_ENABLE_NTFY_CMD_COMPLETE | UCSI_ENABLE_NTFY_ERROR;
1045 command = UCSI_SET_NOTIFICATION_ENABLE | ucsi->ntfy;
1046 ret = ucsi_send_command(ucsi, command, NULL, 0);
1050 /* Get PPM capabilities */
1051 command = UCSI_GET_CAPABILITY;
1052 ret = ucsi_send_command(ucsi, command, &ucsi->cap, sizeof(ucsi->cap));
1056 if (!ucsi->cap.num_connectors) {
1061 /* Allocate the connectors. Released in ucsi_unregister_ppm() */
1062 ucsi->connector = kcalloc(ucsi->cap.num_connectors + 1,
1063 sizeof(*ucsi->connector), GFP_KERNEL);
1064 if (!ucsi->connector) {
1069 /* Register all connectors */
1070 for (i = 0; i < ucsi->cap.num_connectors; i++) {
1071 ret = ucsi_register_port(ucsi, i);
1073 goto err_unregister;
1076 /* Enable all notifications */
1077 ucsi->ntfy = UCSI_ENABLE_NTFY_ALL;
1078 command = UCSI_SET_NOTIFICATION_ENABLE | ucsi->ntfy;
1079 ret = ucsi_send_command(ucsi, command, NULL, 0);
1081 goto err_unregister;
1086 for (con = ucsi->connector; con->port; con++) {
1087 ucsi_unregister_partner(con);
1088 ucsi_unregister_altmodes(con, UCSI_RECIPIENT_CON);
1089 ucsi_unregister_port_psy(con);
1090 typec_unregister_port(con->port);
1095 ucsi_reset_ppm(ucsi);
1100 static void ucsi_init_work(struct work_struct *work)
1102 struct ucsi *ucsi = container_of(work, struct ucsi, work);
1105 ret = ucsi_init(ucsi);
1107 dev_err(ucsi->dev, "PPM init failed (%d)\n", ret);
1111 * ucsi_get_drvdata - Return private driver data pointer
1112 * @ucsi: UCSI interface
1114 void *ucsi_get_drvdata(struct ucsi *ucsi)
1116 return ucsi->driver_data;
1118 EXPORT_SYMBOL_GPL(ucsi_get_drvdata);
1121 * ucsi_get_drvdata - Assign private driver data pointer
1122 * @ucsi: UCSI interface
1123 * @data: Private data pointer
1125 void ucsi_set_drvdata(struct ucsi *ucsi, void *data)
1127 ucsi->driver_data = data;
1129 EXPORT_SYMBOL_GPL(ucsi_set_drvdata);
1132 * ucsi_create - Allocate UCSI instance
1133 * @dev: Device interface to the PPM (Platform Policy Manager)
1134 * @ops: I/O routines
1136 struct ucsi *ucsi_create(struct device *dev, const struct ucsi_operations *ops)
1140 if (!ops || !ops->read || !ops->sync_write || !ops->async_write)
1141 return ERR_PTR(-EINVAL);
1143 ucsi = kzalloc(sizeof(*ucsi), GFP_KERNEL);
1145 return ERR_PTR(-ENOMEM);
1147 INIT_WORK(&ucsi->work, ucsi_init_work);
1148 mutex_init(&ucsi->ppm_lock);
1154 EXPORT_SYMBOL_GPL(ucsi_create);
1157 * ucsi_destroy - Free UCSI instance
1158 * @ucsi: UCSI instance to be freed
1160 void ucsi_destroy(struct ucsi *ucsi)
1164 EXPORT_SYMBOL_GPL(ucsi_destroy);
1167 * ucsi_register - Register UCSI interface
1168 * @ucsi: UCSI instance
1170 int ucsi_register(struct ucsi *ucsi)
1174 ret = ucsi->ops->read(ucsi, UCSI_VERSION, &ucsi->version,
1175 sizeof(ucsi->version));
1182 queue_work(system_long_wq, &ucsi->work);
1186 EXPORT_SYMBOL_GPL(ucsi_register);
1189 * ucsi_unregister - Unregister UCSI interface
1190 * @ucsi: UCSI interface to be unregistered
1192 * Unregister UCSI interface that was created with ucsi_register().
1194 void ucsi_unregister(struct ucsi *ucsi)
1196 u64 cmd = UCSI_SET_NOTIFICATION_ENABLE;
1199 /* Make sure that we are not in the middle of driver initialization */
1200 cancel_work_sync(&ucsi->work);
1202 /* Disable notifications */
1203 ucsi->ops->async_write(ucsi, UCSI_CONTROL, &cmd, sizeof(cmd));
1205 for (i = 0; i < ucsi->cap.num_connectors; i++) {
1206 cancel_work_sync(&ucsi->connector[i].work);
1207 ucsi_unregister_partner(&ucsi->connector[i]);
1208 ucsi_unregister_altmodes(&ucsi->connector[i],
1209 UCSI_RECIPIENT_CON);
1210 ucsi_unregister_port_psy(&ucsi->connector[i]);
1211 typec_unregister_port(ucsi->connector[i].port);
1214 kfree(ucsi->connector);
1216 EXPORT_SYMBOL_GPL(ucsi_unregister);
1219 MODULE_LICENSE("GPL v2");
1220 MODULE_DESCRIPTION("USB Type-C Connector System Software Interface driver");