4 * Copyright 2015 Google Inc.
5 * Copyright 2015 Linaro Ltd.
7 * Released under the GPLv2 only.
10 #include <linux/debugfs.h>
11 #include <linux/input.h>
12 #include <linux/workqueue.h>
16 #define SVC_KEY_ARA_BUTTON KEY_A
18 #define SVC_INTF_EJECT_TIMEOUT 9000
19 #define SVC_INTF_ACTIVATE_TIMEOUT 6000
21 struct gb_svc_deferred_request {
22 struct work_struct work;
23 struct gb_operation *operation;
27 static int gb_svc_queue_deferred_request(struct gb_operation *operation);
29 static ssize_t endo_id_show(struct device *dev,
30 struct device_attribute *attr, char *buf)
32 struct gb_svc *svc = to_gb_svc(dev);
34 return sprintf(buf, "0x%04x\n", svc->endo_id);
36 static DEVICE_ATTR_RO(endo_id);
38 static ssize_t ap_intf_id_show(struct device *dev,
39 struct device_attribute *attr, char *buf)
41 struct gb_svc *svc = to_gb_svc(dev);
43 return sprintf(buf, "%u\n", svc->ap_intf_id);
45 static DEVICE_ATTR_RO(ap_intf_id);
49 // This is a hack, we need to do this "right" and clean the interface up
50 // properly, not just forcibly yank the thing out of the system and hope for the
51 // best. But for now, people want their modules to come out without having to
52 // throw the thing to the ground or get out a screwdriver.
53 static ssize_t intf_eject_store(struct device *dev,
54 struct device_attribute *attr, const char *buf,
57 struct gb_svc *svc = to_gb_svc(dev);
58 unsigned short intf_id;
61 ret = kstrtou16(buf, 10, &intf_id);
65 dev_warn(dev, "Forcibly trying to eject interface %d\n", intf_id);
67 ret = gb_svc_intf_eject(svc, intf_id);
73 static DEVICE_ATTR_WO(intf_eject);
75 static ssize_t watchdog_show(struct device *dev, struct device_attribute *attr,
78 struct gb_svc *svc = to_gb_svc(dev);
80 return sprintf(buf, "%s\n",
81 gb_svc_watchdog_enabled(svc) ? "enabled" : "disabled");
84 static ssize_t watchdog_store(struct device *dev,
85 struct device_attribute *attr, const char *buf,
88 struct gb_svc *svc = to_gb_svc(dev);
92 retval = strtobool(buf, &user_request);
97 retval = gb_svc_watchdog_enable(svc);
99 retval = gb_svc_watchdog_disable(svc);
104 static DEVICE_ATTR_RW(watchdog);
106 static int gb_svc_pwrmon_rail_count_get(struct gb_svc *svc, u8 *value)
108 struct gb_svc_pwrmon_rail_count_get_response response;
111 ret = gb_operation_sync(svc->connection,
112 GB_SVC_TYPE_PWRMON_RAIL_COUNT_GET, NULL, 0,
113 &response, sizeof(response));
115 dev_err(&svc->dev, "failed to get rail count: %d\n", ret);
119 *value = response.rail_count;
124 static int gb_svc_pwrmon_rail_names_get(struct gb_svc *svc,
125 struct gb_svc_pwrmon_rail_names_get_response *response,
130 ret = gb_operation_sync(svc->connection,
131 GB_SVC_TYPE_PWRMON_RAIL_NAMES_GET, NULL, 0,
134 dev_err(&svc->dev, "failed to get rail names: %d\n", ret);
141 static int gb_svc_pwrmon_sample_get(struct gb_svc *svc, u8 rail_id,
142 u8 measurement_type, u32 *value)
144 struct gb_svc_pwrmon_sample_get_request request;
145 struct gb_svc_pwrmon_sample_get_response response;
148 request.rail_id = rail_id;
149 request.measurement_type = measurement_type;
151 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_PWRMON_SAMPLE_GET,
152 &request, sizeof(request),
153 &response, sizeof(response));
155 dev_err(&svc->dev, "failed to get rail sample: %d\n", ret);
159 if (response.result) {
161 "UniPro error while getting rail power sample (%d %d): %d\n",
162 rail_id, measurement_type, response.result);
163 switch (response.result) {
164 case GB_SVC_PWRMON_GET_SAMPLE_INVAL:
166 case GB_SVC_PWRMON_GET_SAMPLE_NOSUPP:
173 *value = le32_to_cpu(response.measurement);
178 int gb_svc_pwrmon_intf_sample_get(struct gb_svc *svc, u8 intf_id,
179 u8 measurement_type, u32 *value)
181 struct gb_svc_pwrmon_intf_sample_get_request request;
182 struct gb_svc_pwrmon_intf_sample_get_response response;
185 request.intf_id = intf_id;
186 request.measurement_type = measurement_type;
188 ret = gb_operation_sync(svc->connection,
189 GB_SVC_TYPE_PWRMON_INTF_SAMPLE_GET,
190 &request, sizeof(request),
191 &response, sizeof(response));
193 dev_err(&svc->dev, "failed to get intf sample: %d\n", ret);
197 if (response.result) {
199 "UniPro error while getting intf power sample (%d %d): %d\n",
200 intf_id, measurement_type, response.result);
201 switch (response.result) {
202 case GB_SVC_PWRMON_GET_SAMPLE_INVAL:
204 case GB_SVC_PWRMON_GET_SAMPLE_NOSUPP:
211 *value = le32_to_cpu(response.measurement);
216 static struct attribute *svc_attrs[] = {
217 &dev_attr_endo_id.attr,
218 &dev_attr_ap_intf_id.attr,
219 &dev_attr_intf_eject.attr,
220 &dev_attr_watchdog.attr,
223 ATTRIBUTE_GROUPS(svc);
225 int gb_svc_intf_device_id(struct gb_svc *svc, u8 intf_id, u8 device_id)
227 struct gb_svc_intf_device_id_request request;
229 request.intf_id = intf_id;
230 request.device_id = device_id;
232 return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_DEVICE_ID,
233 &request, sizeof(request), NULL, 0);
236 int gb_svc_intf_eject(struct gb_svc *svc, u8 intf_id)
238 struct gb_svc_intf_eject_request request;
241 request.intf_id = intf_id;
244 * The pulse width for module release in svc is long so we need to
245 * increase the timeout so the operation will not return to soon.
247 ret = gb_operation_sync_timeout(svc->connection,
248 GB_SVC_TYPE_INTF_EJECT, &request,
249 sizeof(request), NULL, 0,
250 SVC_INTF_EJECT_TIMEOUT);
252 dev_err(&svc->dev, "failed to eject interface %u\n", intf_id);
259 int gb_svc_intf_vsys_set(struct gb_svc *svc, u8 intf_id, bool enable)
261 struct gb_svc_intf_vsys_request request;
262 struct gb_svc_intf_vsys_response response;
265 request.intf_id = intf_id;
268 type = GB_SVC_TYPE_INTF_VSYS_ENABLE;
270 type = GB_SVC_TYPE_INTF_VSYS_DISABLE;
272 ret = gb_operation_sync(svc->connection, type,
273 &request, sizeof(request),
274 &response, sizeof(response));
277 if (response.result_code != GB_SVC_INTF_VSYS_OK)
282 int gb_svc_intf_refclk_set(struct gb_svc *svc, u8 intf_id, bool enable)
284 struct gb_svc_intf_refclk_request request;
285 struct gb_svc_intf_refclk_response response;
288 request.intf_id = intf_id;
291 type = GB_SVC_TYPE_INTF_REFCLK_ENABLE;
293 type = GB_SVC_TYPE_INTF_REFCLK_DISABLE;
295 ret = gb_operation_sync(svc->connection, type,
296 &request, sizeof(request),
297 &response, sizeof(response));
300 if (response.result_code != GB_SVC_INTF_REFCLK_OK)
305 int gb_svc_intf_unipro_set(struct gb_svc *svc, u8 intf_id, bool enable)
307 struct gb_svc_intf_unipro_request request;
308 struct gb_svc_intf_unipro_response response;
311 request.intf_id = intf_id;
314 type = GB_SVC_TYPE_INTF_UNIPRO_ENABLE;
316 type = GB_SVC_TYPE_INTF_UNIPRO_DISABLE;
318 ret = gb_operation_sync(svc->connection, type,
319 &request, sizeof(request),
320 &response, sizeof(response));
323 if (response.result_code != GB_SVC_INTF_UNIPRO_OK)
328 int gb_svc_intf_activate(struct gb_svc *svc, u8 intf_id, u8 *intf_type)
330 struct gb_svc_intf_activate_request request;
331 struct gb_svc_intf_activate_response response;
334 request.intf_id = intf_id;
336 ret = gb_operation_sync_timeout(svc->connection,
337 GB_SVC_TYPE_INTF_ACTIVATE,
338 &request, sizeof(request),
339 &response, sizeof(response),
340 SVC_INTF_ACTIVATE_TIMEOUT);
343 if (response.status != GB_SVC_OP_SUCCESS) {
344 dev_err(&svc->dev, "failed to activate interface %u: %u\n",
345 intf_id, response.status);
349 *intf_type = response.intf_type;
354 int gb_svc_dme_peer_get(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector,
357 struct gb_svc_dme_peer_get_request request;
358 struct gb_svc_dme_peer_get_response response;
362 request.intf_id = intf_id;
363 request.attr = cpu_to_le16(attr);
364 request.selector = cpu_to_le16(selector);
366 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_DME_PEER_GET,
367 &request, sizeof(request),
368 &response, sizeof(response));
370 dev_err(&svc->dev, "failed to get DME attribute (%u 0x%04x %u): %d\n",
371 intf_id, attr, selector, ret);
375 result = le16_to_cpu(response.result_code);
377 dev_err(&svc->dev, "UniPro error while getting DME attribute (%u 0x%04x %u): %u\n",
378 intf_id, attr, selector, result);
383 *value = le32_to_cpu(response.attr_value);
387 EXPORT_SYMBOL_GPL(gb_svc_dme_peer_get);
389 int gb_svc_dme_peer_set(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector,
392 struct gb_svc_dme_peer_set_request request;
393 struct gb_svc_dme_peer_set_response response;
397 request.intf_id = intf_id;
398 request.attr = cpu_to_le16(attr);
399 request.selector = cpu_to_le16(selector);
400 request.value = cpu_to_le32(value);
402 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_DME_PEER_SET,
403 &request, sizeof(request),
404 &response, sizeof(response));
406 dev_err(&svc->dev, "failed to set DME attribute (%u 0x%04x %u %u): %d\n",
407 intf_id, attr, selector, value, ret);
411 result = le16_to_cpu(response.result_code);
413 dev_err(&svc->dev, "UniPro error while setting DME attribute (%u 0x%04x %u %u): %u\n",
414 intf_id, attr, selector, value, result);
420 EXPORT_SYMBOL_GPL(gb_svc_dme_peer_set);
422 int gb_svc_connection_create(struct gb_svc *svc,
423 u8 intf1_id, u16 cport1_id,
424 u8 intf2_id, u16 cport2_id,
427 struct gb_svc_conn_create_request request;
429 request.intf1_id = intf1_id;
430 request.cport1_id = cpu_to_le16(cport1_id);
431 request.intf2_id = intf2_id;
432 request.cport2_id = cpu_to_le16(cport2_id);
433 request.tc = 0; /* TC0 */
434 request.flags = cport_flags;
436 return gb_operation_sync(svc->connection, GB_SVC_TYPE_CONN_CREATE,
437 &request, sizeof(request), NULL, 0);
439 EXPORT_SYMBOL_GPL(gb_svc_connection_create);
441 void gb_svc_connection_destroy(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
442 u8 intf2_id, u16 cport2_id)
444 struct gb_svc_conn_destroy_request request;
445 struct gb_connection *connection = svc->connection;
448 request.intf1_id = intf1_id;
449 request.cport1_id = cpu_to_le16(cport1_id);
450 request.intf2_id = intf2_id;
451 request.cport2_id = cpu_to_le16(cport2_id);
453 ret = gb_operation_sync(connection, GB_SVC_TYPE_CONN_DESTROY,
454 &request, sizeof(request), NULL, 0);
456 dev_err(&svc->dev, "failed to destroy connection (%u:%u %u:%u): %d\n",
457 intf1_id, cport1_id, intf2_id, cport2_id, ret);
460 EXPORT_SYMBOL_GPL(gb_svc_connection_destroy);
462 int gb_svc_timesync_enable(struct gb_svc *svc, u8 count, u64 frame_time,
463 u32 strobe_delay, u32 refclk)
465 struct gb_connection *connection = svc->connection;
466 struct gb_svc_timesync_enable_request request;
468 request.count = count;
469 request.frame_time = cpu_to_le64(frame_time);
470 request.strobe_delay = cpu_to_le32(strobe_delay);
471 request.refclk = cpu_to_le32(refclk);
472 return gb_operation_sync(connection,
473 GB_SVC_TYPE_TIMESYNC_ENABLE,
474 &request, sizeof(request), NULL, 0);
476 EXPORT_SYMBOL_GPL(gb_svc_timesync_enable);
478 int gb_svc_timesync_disable(struct gb_svc *svc)
480 struct gb_connection *connection = svc->connection;
482 return gb_operation_sync(connection,
483 GB_SVC_TYPE_TIMESYNC_DISABLE,
486 EXPORT_SYMBOL_GPL(gb_svc_timesync_disable);
488 int gb_svc_timesync_authoritative(struct gb_svc *svc, u64 *frame_time)
490 struct gb_connection *connection = svc->connection;
491 struct gb_svc_timesync_authoritative_response response;
494 ret = gb_operation_sync(connection,
495 GB_SVC_TYPE_TIMESYNC_AUTHORITATIVE, NULL, 0,
496 &response, sizeof(response));
500 for (i = 0; i < GB_TIMESYNC_MAX_STROBES; i++)
501 frame_time[i] = le64_to_cpu(response.frame_time[i]);
504 EXPORT_SYMBOL_GPL(gb_svc_timesync_authoritative);
506 int gb_svc_timesync_ping(struct gb_svc *svc, u64 *frame_time)
508 struct gb_connection *connection = svc->connection;
509 struct gb_svc_timesync_ping_response response;
512 ret = gb_operation_sync(connection,
513 GB_SVC_TYPE_TIMESYNC_PING,
515 &response, sizeof(response));
519 *frame_time = le64_to_cpu(response.frame_time);
522 EXPORT_SYMBOL_GPL(gb_svc_timesync_ping);
524 int gb_svc_timesync_wake_pins_acquire(struct gb_svc *svc, u32 strobe_mask)
526 struct gb_connection *connection = svc->connection;
527 struct gb_svc_timesync_wake_pins_acquire_request request;
529 request.strobe_mask = cpu_to_le32(strobe_mask);
530 return gb_operation_sync(connection,
531 GB_SVC_TYPE_TIMESYNC_WAKE_PINS_ACQUIRE,
532 &request, sizeof(request),
535 EXPORT_SYMBOL_GPL(gb_svc_timesync_wake_pins_acquire);
537 int gb_svc_timesync_wake_pins_release(struct gb_svc *svc)
539 struct gb_connection *connection = svc->connection;
541 return gb_operation_sync(connection,
542 GB_SVC_TYPE_TIMESYNC_WAKE_PINS_RELEASE,
545 EXPORT_SYMBOL_GPL(gb_svc_timesync_wake_pins_release);
547 /* Creates bi-directional routes between the devices */
548 int gb_svc_route_create(struct gb_svc *svc, u8 intf1_id, u8 dev1_id,
549 u8 intf2_id, u8 dev2_id)
551 struct gb_svc_route_create_request request;
553 request.intf1_id = intf1_id;
554 request.dev1_id = dev1_id;
555 request.intf2_id = intf2_id;
556 request.dev2_id = dev2_id;
558 return gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_CREATE,
559 &request, sizeof(request), NULL, 0);
562 /* Destroys bi-directional routes between the devices */
563 void gb_svc_route_destroy(struct gb_svc *svc, u8 intf1_id, u8 intf2_id)
565 struct gb_svc_route_destroy_request request;
568 request.intf1_id = intf1_id;
569 request.intf2_id = intf2_id;
571 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_DESTROY,
572 &request, sizeof(request), NULL, 0);
574 dev_err(&svc->dev, "failed to destroy route (%u %u): %d\n",
575 intf1_id, intf2_id, ret);
579 int gb_svc_intf_set_power_mode(struct gb_svc *svc, u8 intf_id, u8 hs_series,
580 u8 tx_mode, u8 tx_gear, u8 tx_nlanes,
581 u8 rx_mode, u8 rx_gear, u8 rx_nlanes,
582 u8 flags, u32 quirks)
584 struct gb_svc_intf_set_pwrm_request request;
585 struct gb_svc_intf_set_pwrm_response response;
588 request.intf_id = intf_id;
589 request.hs_series = hs_series;
590 request.tx_mode = tx_mode;
591 request.tx_gear = tx_gear;
592 request.tx_nlanes = tx_nlanes;
593 request.rx_mode = rx_mode;
594 request.rx_gear = rx_gear;
595 request.rx_nlanes = rx_nlanes;
596 request.flags = flags;
597 request.quirks = cpu_to_le32(quirks);
599 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_SET_PWRM,
600 &request, sizeof(request),
601 &response, sizeof(response));
605 return le16_to_cpu(response.result_code);
607 EXPORT_SYMBOL_GPL(gb_svc_intf_set_power_mode);
609 int gb_svc_ping(struct gb_svc *svc)
611 return gb_operation_sync_timeout(svc->connection, GB_SVC_TYPE_PING,
613 GB_OPERATION_TIMEOUT_DEFAULT * 2);
615 EXPORT_SYMBOL_GPL(gb_svc_ping);
617 static int gb_svc_version_request(struct gb_operation *op)
619 struct gb_connection *connection = op->connection;
620 struct gb_svc *svc = gb_connection_get_data(connection);
621 struct gb_svc_version_request *request;
622 struct gb_svc_version_response *response;
624 if (op->request->payload_size < sizeof(*request)) {
625 dev_err(&svc->dev, "short version request (%zu < %zu)\n",
626 op->request->payload_size,
631 request = op->request->payload;
633 if (request->major > GB_SVC_VERSION_MAJOR) {
634 dev_warn(&svc->dev, "unsupported major version (%u > %u)\n",
635 request->major, GB_SVC_VERSION_MAJOR);
639 svc->protocol_major = request->major;
640 svc->protocol_minor = request->minor;
642 if (!gb_operation_response_alloc(op, sizeof(*response), GFP_KERNEL))
645 response = op->response->payload;
646 response->major = svc->protocol_major;
647 response->minor = svc->protocol_minor;
652 static ssize_t pwr_debugfs_voltage_read(struct file *file, char __user *buf,
653 size_t len, loff_t *offset)
655 struct svc_debugfs_pwrmon_rail *pwrmon_rails = file->f_inode->i_private;
656 struct gb_svc *svc = pwrmon_rails->svc;
661 ret = gb_svc_pwrmon_sample_get(svc, pwrmon_rails->id,
662 GB_SVC_PWRMON_TYPE_VOL, &value);
665 "failed to get voltage sample %u: %d\n",
666 pwrmon_rails->id, ret);
670 desc = scnprintf(buff, sizeof(buff), "%u\n", value);
672 return simple_read_from_buffer(buf, len, offset, buff, desc);
675 static ssize_t pwr_debugfs_current_read(struct file *file, char __user *buf,
676 size_t len, loff_t *offset)
678 struct svc_debugfs_pwrmon_rail *pwrmon_rails = file->f_inode->i_private;
679 struct gb_svc *svc = pwrmon_rails->svc;
684 ret = gb_svc_pwrmon_sample_get(svc, pwrmon_rails->id,
685 GB_SVC_PWRMON_TYPE_CURR, &value);
688 "failed to get current sample %u: %d\n",
689 pwrmon_rails->id, ret);
693 desc = scnprintf(buff, sizeof(buff), "%u\n", value);
695 return simple_read_from_buffer(buf, len, offset, buff, desc);
698 static ssize_t pwr_debugfs_power_read(struct file *file, char __user *buf,
699 size_t len, loff_t *offset)
701 struct svc_debugfs_pwrmon_rail *pwrmon_rails = file->f_inode->i_private;
702 struct gb_svc *svc = pwrmon_rails->svc;
707 ret = gb_svc_pwrmon_sample_get(svc, pwrmon_rails->id,
708 GB_SVC_PWRMON_TYPE_PWR, &value);
710 dev_err(&svc->dev, "failed to get power sample %u: %d\n",
711 pwrmon_rails->id, ret);
715 desc = scnprintf(buff, sizeof(buff), "%u\n", value);
717 return simple_read_from_buffer(buf, len, offset, buff, desc);
720 static const struct file_operations pwrmon_debugfs_voltage_fops = {
721 .read = pwr_debugfs_voltage_read,
724 static const struct file_operations pwrmon_debugfs_current_fops = {
725 .read = pwr_debugfs_current_read,
728 static const struct file_operations pwrmon_debugfs_power_fops = {
729 .read = pwr_debugfs_power_read,
732 static void gb_svc_pwrmon_debugfs_init(struct gb_svc *svc)
737 struct gb_svc_pwrmon_rail_names_get_response *rail_names;
740 dent = debugfs_create_dir("pwrmon", svc->debugfs_dentry);
741 if (IS_ERR_OR_NULL(dent))
744 if (gb_svc_pwrmon_rail_count_get(svc, &rail_count))
745 goto err_pwrmon_debugfs;
747 if (!rail_count || rail_count > GB_SVC_PWRMON_MAX_RAIL_COUNT)
748 goto err_pwrmon_debugfs;
750 bufsize = GB_SVC_PWRMON_RAIL_NAME_BUFSIZE * rail_count;
752 rail_names = kzalloc(bufsize, GFP_KERNEL);
754 goto err_pwrmon_debugfs;
756 svc->pwrmon_rails = kcalloc(rail_count, sizeof(*svc->pwrmon_rails),
758 if (!svc->pwrmon_rails)
759 goto err_pwrmon_debugfs_free;
761 if (gb_svc_pwrmon_rail_names_get(svc, rail_names, bufsize))
762 goto err_pwrmon_debugfs_free;
764 for (i = 0; i < rail_count; i++) {
766 struct svc_debugfs_pwrmon_rail *rail = &svc->pwrmon_rails[i];
767 char fname[GB_SVC_PWRMON_RAIL_NAME_BUFSIZE];
769 snprintf(fname, sizeof(fname), "%s",
770 (char *)&rail_names->name[i]);
775 dir = debugfs_create_dir(fname, dent);
776 debugfs_create_file("voltage_now", S_IRUGO, dir, rail,
777 &pwrmon_debugfs_voltage_fops);
778 debugfs_create_file("current_now", S_IRUGO, dir, rail,
779 &pwrmon_debugfs_current_fops);
780 debugfs_create_file("power_now", S_IRUGO, dir, rail,
781 &pwrmon_debugfs_power_fops);
787 err_pwrmon_debugfs_free:
789 kfree(svc->pwrmon_rails);
790 svc->pwrmon_rails = NULL;
793 debugfs_remove(dent);
796 static void gb_svc_debugfs_init(struct gb_svc *svc)
798 svc->debugfs_dentry = debugfs_create_dir(dev_name(&svc->dev),
800 gb_svc_pwrmon_debugfs_init(svc);
803 static void gb_svc_debugfs_exit(struct gb_svc *svc)
805 debugfs_remove_recursive(svc->debugfs_dentry);
806 kfree(svc->pwrmon_rails);
807 svc->pwrmon_rails = NULL;
810 static int gb_svc_hello(struct gb_operation *op)
812 struct gb_connection *connection = op->connection;
813 struct gb_svc *svc = gb_connection_get_data(connection);
814 struct gb_svc_hello_request *hello_request;
817 if (op->request->payload_size < sizeof(*hello_request)) {
818 dev_warn(&svc->dev, "short hello request (%zu < %zu)\n",
819 op->request->payload_size,
820 sizeof(*hello_request));
824 hello_request = op->request->payload;
825 svc->endo_id = le16_to_cpu(hello_request->endo_id);
826 svc->ap_intf_id = hello_request->interface_id;
828 ret = device_add(&svc->dev);
830 dev_err(&svc->dev, "failed to register svc device: %d\n", ret);
834 ret = input_register_device(svc->input);
836 dev_err(&svc->dev, "failed to register input: %d\n", ret);
837 device_del(&svc->dev);
841 ret = gb_svc_watchdog_create(svc);
843 dev_err(&svc->dev, "failed to create watchdog: %d\n", ret);
844 input_unregister_device(svc->input);
845 device_del(&svc->dev);
849 gb_svc_debugfs_init(svc);
851 return gb_svc_queue_deferred_request(op);
854 static struct gb_interface *gb_svc_interface_lookup(struct gb_svc *svc,
857 struct gb_host_device *hd = svc->hd;
858 struct gb_module *module;
859 size_t num_interfaces;
862 list_for_each_entry(module, &hd->modules, hd_node) {
863 module_id = module->module_id;
864 num_interfaces = module->num_interfaces;
866 if (intf_id >= module_id &&
867 intf_id < module_id + num_interfaces) {
868 return module->interfaces[intf_id - module_id];
875 static struct gb_module *gb_svc_module_lookup(struct gb_svc *svc, u8 module_id)
877 struct gb_host_device *hd = svc->hd;
878 struct gb_module *module;
880 list_for_each_entry(module, &hd->modules, hd_node) {
881 if (module->module_id == module_id)
888 static void gb_svc_intf_reenable(struct gb_svc *svc, struct gb_interface *intf)
892 mutex_lock(&intf->mutex);
894 /* Mark as disconnected to prevent I/O during disable. */
895 intf->disconnected = true;
896 gb_interface_disable(intf);
897 intf->disconnected = false;
899 ret = gb_interface_enable(intf);
901 dev_err(&svc->dev, "failed to enable interface %u: %d\n",
902 intf->interface_id, ret);
904 gb_interface_deactivate(intf);
907 mutex_unlock(&intf->mutex);
910 static void gb_svc_process_hello_deferred(struct gb_operation *operation)
912 struct gb_connection *connection = operation->connection;
913 struct gb_svc *svc = gb_connection_get_data(connection);
917 * XXX This is a hack/work-around to reconfigure the APBridgeA-Switch
918 * link to PWM G2, 1 Lane, Slow Auto, so that it has sufficient
919 * bandwidth for 3 audio streams plus boot-over-UniPro of a hot-plugged
922 * The code should be removed once SW-2217, Heuristic for UniPro
923 * Power Mode Changes is resolved.
925 ret = gb_svc_intf_set_power_mode(svc, svc->ap_intf_id,
926 GB_SVC_UNIPRO_HS_SERIES_A,
927 GB_SVC_UNIPRO_SLOW_AUTO_MODE,
929 GB_SVC_UNIPRO_SLOW_AUTO_MODE,
935 "power mode change failed on AP to switch link: %d\n",
939 static void gb_svc_process_intf_hotplug(struct gb_operation *operation)
941 struct gb_svc_intf_hotplug_request *request;
942 struct gb_connection *connection = operation->connection;
943 struct gb_svc *svc = gb_connection_get_data(connection);
944 struct gb_host_device *hd = connection->hd;
945 struct gb_module *module;
949 /* The request message size has already been verified. */
950 request = operation->request->payload;
951 intf_id = request->intf_id;
953 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, intf_id);
955 /* All modules are considered 1x2 for now */
956 module = gb_svc_module_lookup(svc, intf_id);
958 dev_info(&svc->dev, "mode switch detected on interface %u\n",
961 return gb_svc_intf_reenable(svc, module->interfaces[0]);
964 module = gb_module_create(hd, intf_id, 1);
966 dev_err(&svc->dev, "failed to create module\n");
970 ret = gb_module_add(module);
972 gb_module_put(module);
976 list_add(&module->hd_node, &hd->modules);
979 static void gb_svc_process_intf_hot_unplug(struct gb_operation *operation)
981 struct gb_svc *svc = gb_connection_get_data(operation->connection);
982 struct gb_svc_intf_hot_unplug_request *request;
983 struct gb_module *module;
986 /* The request message size has already been verified. */
987 request = operation->request->payload;
988 intf_id = request->intf_id;
990 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, intf_id);
992 /* All modules are considered 1x2 for now */
993 module = gb_svc_module_lookup(svc, intf_id);
995 dev_warn(&svc->dev, "could not find hot-unplug interface %u\n",
1000 module->disconnected = true;
1002 gb_module_del(module);
1003 list_del(&module->hd_node);
1004 gb_module_put(module);
1007 static void gb_svc_process_module_inserted(struct gb_operation *operation)
1009 struct gb_svc_module_inserted_request *request;
1010 struct gb_connection *connection = operation->connection;
1011 struct gb_svc *svc = gb_connection_get_data(connection);
1012 struct gb_host_device *hd = svc->hd;
1013 struct gb_module *module;
1014 size_t num_interfaces;
1019 /* The request message size has already been verified. */
1020 request = operation->request->payload;
1021 module_id = request->primary_intf_id;
1022 num_interfaces = request->intf_count;
1023 flags = le16_to_cpu(request->flags);
1025 dev_dbg(&svc->dev, "%s - id = %u, num_interfaces = %zu, flags = 0x%04x\n",
1026 __func__, module_id, num_interfaces, flags);
1028 if (flags & GB_SVC_MODULE_INSERTED_FLAG_NO_PRIMARY) {
1029 dev_warn(&svc->dev, "no primary interface detected on module %u\n",
1033 module = gb_svc_module_lookup(svc, module_id);
1035 dev_warn(&svc->dev, "unexpected module-inserted event %u\n",
1040 module = gb_module_create(hd, module_id, num_interfaces);
1042 dev_err(&svc->dev, "failed to create module\n");
1046 ret = gb_module_add(module);
1048 gb_module_put(module);
1052 list_add(&module->hd_node, &hd->modules);
1055 static void gb_svc_process_module_removed(struct gb_operation *operation)
1057 struct gb_svc_module_removed_request *request;
1058 struct gb_connection *connection = operation->connection;
1059 struct gb_svc *svc = gb_connection_get_data(connection);
1060 struct gb_module *module;
1063 /* The request message size has already been verified. */
1064 request = operation->request->payload;
1065 module_id = request->primary_intf_id;
1067 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, module_id);
1069 module = gb_svc_module_lookup(svc, module_id);
1071 dev_warn(&svc->dev, "unexpected module-removed event %u\n",
1076 module->disconnected = true;
1078 gb_module_del(module);
1079 list_del(&module->hd_node);
1080 gb_module_put(module);
1083 static void gb_svc_process_intf_mailbox_event(struct gb_operation *operation)
1085 struct gb_svc_intf_mailbox_event_request *request;
1086 struct gb_connection *connection = operation->connection;
1087 struct gb_svc *svc = gb_connection_get_data(connection);
1088 struct gb_interface *intf;
1093 /* The request message size has already been verified. */
1094 request = operation->request->payload;
1095 intf_id = request->intf_id;
1096 result_code = le16_to_cpu(request->result_code);
1097 mailbox = le32_to_cpu(request->mailbox);
1099 dev_dbg(&svc->dev, "%s - id = %u, result = 0x%04x, mailbox = 0x%08x\n",
1100 __func__, intf_id, result_code, mailbox);
1102 intf = gb_svc_interface_lookup(svc, intf_id);
1104 dev_warn(&svc->dev, "unexpected mailbox event %u\n", intf_id);
1110 "mailbox event %u with UniPro error: 0x%04x\n",
1111 intf_id, result_code);
1112 goto err_disable_interface;
1115 if (mailbox != GB_SVC_INTF_MAILBOX_GREYBUS) {
1117 "mailbox event %u with unexected value: 0x%08x\n",
1119 goto err_disable_interface;
1122 dev_info(&svc->dev, "mode switch detected on interface %u\n", intf_id);
1124 gb_svc_intf_reenable(svc, intf);
1128 err_disable_interface:
1129 mutex_lock(&intf->mutex);
1130 gb_interface_disable(intf);
1131 gb_interface_deactivate(intf);
1132 mutex_unlock(&intf->mutex);
1135 static void gb_svc_process_deferred_request(struct work_struct *work)
1137 struct gb_svc_deferred_request *dr;
1138 struct gb_operation *operation;
1142 dr = container_of(work, struct gb_svc_deferred_request, work);
1143 operation = dr->operation;
1144 svc = gb_connection_get_data(operation->connection);
1145 type = operation->request->header->type;
1148 case GB_SVC_TYPE_SVC_HELLO:
1149 gb_svc_process_hello_deferred(operation);
1151 case GB_SVC_TYPE_INTF_HOTPLUG:
1152 gb_svc_process_intf_hotplug(operation);
1154 case GB_SVC_TYPE_INTF_HOT_UNPLUG:
1155 gb_svc_process_intf_hot_unplug(operation);
1157 case GB_SVC_TYPE_MODULE_INSERTED:
1158 gb_svc_process_module_inserted(operation);
1160 case GB_SVC_TYPE_MODULE_REMOVED:
1161 gb_svc_process_module_removed(operation);
1163 case GB_SVC_TYPE_INTF_MAILBOX_EVENT:
1164 gb_svc_process_intf_mailbox_event(operation);
1167 dev_err(&svc->dev, "bad deferred request type: 0x%02x\n", type);
1170 gb_operation_put(operation);
1174 static int gb_svc_queue_deferred_request(struct gb_operation *operation)
1176 struct gb_svc *svc = gb_connection_get_data(operation->connection);
1177 struct gb_svc_deferred_request *dr;
1179 dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1183 gb_operation_get(operation);
1185 dr->operation = operation;
1186 INIT_WORK(&dr->work, gb_svc_process_deferred_request);
1188 queue_work(svc->wq, &dr->work);
1194 * Bringing up a module can be time consuming, as that may require lots of
1195 * initialization on the module side. Over that, we may also need to download
1196 * the firmware first and flash that on the module.
1198 * In order not to make other svc events wait for all this to finish,
1199 * handle most of module hotplug stuff outside of the hotplug callback, with
1200 * help of a workqueue.
1202 static int gb_svc_intf_hotplug_recv(struct gb_operation *op)
1204 struct gb_svc *svc = gb_connection_get_data(op->connection);
1205 struct gb_svc_intf_hotplug_request *request;
1207 if (op->request->payload_size < sizeof(*request)) {
1208 dev_warn(&svc->dev, "short hotplug request received (%zu < %zu)\n",
1209 op->request->payload_size, sizeof(*request));
1213 request = op->request->payload;
1215 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, request->intf_id);
1217 return gb_svc_queue_deferred_request(op);
1220 static int gb_svc_intf_hot_unplug_recv(struct gb_operation *op)
1222 struct gb_svc *svc = gb_connection_get_data(op->connection);
1223 struct gb_svc_intf_hot_unplug_request *request;
1225 if (op->request->payload_size < sizeof(*request)) {
1226 dev_warn(&svc->dev, "short hot unplug request received (%zu < %zu)\n",
1227 op->request->payload_size, sizeof(*request));
1231 request = op->request->payload;
1233 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, request->intf_id);
1235 return gb_svc_queue_deferred_request(op);
1238 static int gb_svc_intf_reset_recv(struct gb_operation *op)
1240 struct gb_svc *svc = gb_connection_get_data(op->connection);
1241 struct gb_message *request = op->request;
1242 struct gb_svc_intf_reset_request *reset;
1245 if (request->payload_size < sizeof(*reset)) {
1246 dev_warn(&svc->dev, "short reset request received (%zu < %zu)\n",
1247 request->payload_size, sizeof(*reset));
1250 reset = request->payload;
1252 intf_id = reset->intf_id;
1254 /* FIXME Reset the interface here */
1259 static int gb_svc_key_code_map(struct gb_svc *svc, u16 key_code, u16 *code)
1262 case GB_KEYCODE_ARA:
1263 *code = SVC_KEY_ARA_BUTTON;
1266 dev_warn(&svc->dev, "unknown keycode received: %u\n", key_code);
1273 static int gb_svc_key_event_recv(struct gb_operation *op)
1275 struct gb_svc *svc = gb_connection_get_data(op->connection);
1276 struct gb_message *request = op->request;
1277 struct gb_svc_key_event_request *key;
1282 if (request->payload_size < sizeof(*key)) {
1283 dev_warn(&svc->dev, "short key request received (%zu < %zu)\n",
1284 request->payload_size, sizeof(*key));
1288 key = request->payload;
1290 ret = gb_svc_key_code_map(svc, le16_to_cpu(key->key_code), &code);
1294 event = key->key_event;
1295 if ((event != GB_SVC_KEY_PRESSED) && (event != GB_SVC_KEY_RELEASED)) {
1296 dev_warn(&svc->dev, "unknown key event received: %u\n", event);
1300 input_report_key(svc->input, code, (event == GB_SVC_KEY_PRESSED));
1301 input_sync(svc->input);
1306 static int gb_svc_module_inserted_recv(struct gb_operation *op)
1308 struct gb_svc *svc = gb_connection_get_data(op->connection);
1309 struct gb_svc_module_inserted_request *request;
1311 if (op->request->payload_size < sizeof(*request)) {
1312 dev_warn(&svc->dev, "short module-inserted request received (%zu < %zu)\n",
1313 op->request->payload_size, sizeof(*request));
1317 request = op->request->payload;
1319 dev_dbg(&svc->dev, "%s - id = %u\n", __func__,
1320 request->primary_intf_id);
1322 return gb_svc_queue_deferred_request(op);
1325 static int gb_svc_module_removed_recv(struct gb_operation *op)
1327 struct gb_svc *svc = gb_connection_get_data(op->connection);
1328 struct gb_svc_module_removed_request *request;
1330 if (op->request->payload_size < sizeof(*request)) {
1331 dev_warn(&svc->dev, "short module-removed request received (%zu < %zu)\n",
1332 op->request->payload_size, sizeof(*request));
1336 request = op->request->payload;
1338 dev_dbg(&svc->dev, "%s - id = %u\n", __func__,
1339 request->primary_intf_id);
1341 return gb_svc_queue_deferred_request(op);
1344 static int gb_svc_intf_mailbox_event_recv(struct gb_operation *op)
1346 struct gb_svc *svc = gb_connection_get_data(op->connection);
1347 struct gb_svc_intf_mailbox_event_request *request;
1349 if (op->request->payload_size < sizeof(*request)) {
1350 dev_warn(&svc->dev, "short mailbox request received (%zu < %zu)\n",
1351 op->request->payload_size, sizeof(*request));
1355 request = op->request->payload;
1357 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, request->intf_id);
1359 return gb_svc_queue_deferred_request(op);
1362 static int gb_svc_request_handler(struct gb_operation *op)
1364 struct gb_connection *connection = op->connection;
1365 struct gb_svc *svc = gb_connection_get_data(connection);
1370 * SVC requests need to follow a specific order (at least initially) and
1371 * below code takes care of enforcing that. The expected order is:
1372 * - PROTOCOL_VERSION
1374 * - Any other request, but the earlier two.
1376 * Incoming requests are guaranteed to be serialized and so we don't
1377 * need to protect 'state' for any races.
1380 case GB_SVC_TYPE_PROTOCOL_VERSION:
1381 if (svc->state != GB_SVC_STATE_RESET)
1384 case GB_SVC_TYPE_SVC_HELLO:
1385 if (svc->state != GB_SVC_STATE_PROTOCOL_VERSION)
1389 if (svc->state != GB_SVC_STATE_SVC_HELLO)
1395 dev_warn(&svc->dev, "unexpected request 0x%02x received (state %u)\n",
1401 case GB_SVC_TYPE_PROTOCOL_VERSION:
1402 ret = gb_svc_version_request(op);
1404 svc->state = GB_SVC_STATE_PROTOCOL_VERSION;
1406 case GB_SVC_TYPE_SVC_HELLO:
1407 ret = gb_svc_hello(op);
1409 svc->state = GB_SVC_STATE_SVC_HELLO;
1411 case GB_SVC_TYPE_INTF_HOTPLUG:
1412 return gb_svc_intf_hotplug_recv(op);
1413 case GB_SVC_TYPE_INTF_HOT_UNPLUG:
1414 return gb_svc_intf_hot_unplug_recv(op);
1415 case GB_SVC_TYPE_INTF_RESET:
1416 return gb_svc_intf_reset_recv(op);
1417 case GB_SVC_TYPE_KEY_EVENT:
1418 return gb_svc_key_event_recv(op);
1419 case GB_SVC_TYPE_MODULE_INSERTED:
1420 return gb_svc_module_inserted_recv(op);
1421 case GB_SVC_TYPE_MODULE_REMOVED:
1422 return gb_svc_module_removed_recv(op);
1423 case GB_SVC_TYPE_INTF_MAILBOX_EVENT:
1424 return gb_svc_intf_mailbox_event_recv(op);
1426 dev_warn(&svc->dev, "unsupported request 0x%02x\n", type);
1431 static struct input_dev *gb_svc_input_create(struct gb_svc *svc)
1433 struct input_dev *input_dev;
1435 input_dev = input_allocate_device();
1437 return ERR_PTR(-ENOMEM);
1439 input_dev->name = dev_name(&svc->dev);
1440 svc->input_phys = kasprintf(GFP_KERNEL, "greybus-%s/input0",
1442 if (!svc->input_phys)
1443 goto err_free_input;
1445 input_dev->phys = svc->input_phys;
1446 input_dev->dev.parent = &svc->dev;
1448 input_set_drvdata(input_dev, svc);
1450 input_set_capability(input_dev, EV_KEY, SVC_KEY_ARA_BUTTON);
1455 input_free_device(svc->input);
1456 return ERR_PTR(-ENOMEM);
1459 static void gb_svc_release(struct device *dev)
1461 struct gb_svc *svc = to_gb_svc(dev);
1463 if (svc->connection)
1464 gb_connection_destroy(svc->connection);
1465 ida_destroy(&svc->device_id_map);
1466 destroy_workqueue(svc->wq);
1467 kfree(svc->input_phys);
1471 struct device_type greybus_svc_type = {
1472 .name = "greybus_svc",
1473 .release = gb_svc_release,
1476 struct gb_svc *gb_svc_create(struct gb_host_device *hd)
1480 svc = kzalloc(sizeof(*svc), GFP_KERNEL);
1484 svc->wq = alloc_workqueue("%s:svc", WQ_UNBOUND, 1, dev_name(&hd->dev));
1490 svc->dev.parent = &hd->dev;
1491 svc->dev.bus = &greybus_bus_type;
1492 svc->dev.type = &greybus_svc_type;
1493 svc->dev.groups = svc_groups;
1494 svc->dev.dma_mask = svc->dev.parent->dma_mask;
1495 device_initialize(&svc->dev);
1497 dev_set_name(&svc->dev, "%d-svc", hd->bus_id);
1499 ida_init(&svc->device_id_map);
1500 svc->state = GB_SVC_STATE_RESET;
1503 svc->input = gb_svc_input_create(svc);
1504 if (IS_ERR(svc->input)) {
1505 dev_err(&svc->dev, "failed to create input device: %ld\n",
1506 PTR_ERR(svc->input));
1507 goto err_put_device;
1510 svc->connection = gb_connection_create_static(hd, GB_SVC_CPORT_ID,
1511 gb_svc_request_handler);
1512 if (IS_ERR(svc->connection)) {
1513 dev_err(&svc->dev, "failed to create connection: %ld\n",
1514 PTR_ERR(svc->connection));
1515 goto err_free_input;
1518 gb_connection_set_data(svc->connection, svc);
1523 input_free_device(svc->input);
1525 put_device(&svc->dev);
1529 int gb_svc_add(struct gb_svc *svc)
1534 * The SVC protocol is currently driven by the SVC, so the SVC device
1535 * is added from the connection request handler when enough
1536 * information has been received.
1538 ret = gb_connection_enable(svc->connection);
1545 static void gb_svc_remove_modules(struct gb_svc *svc)
1547 struct gb_host_device *hd = svc->hd;
1548 struct gb_module *module, *tmp;
1550 list_for_each_entry_safe(module, tmp, &hd->modules, hd_node) {
1551 gb_module_del(module);
1552 list_del(&module->hd_node);
1553 gb_module_put(module);
1557 void gb_svc_del(struct gb_svc *svc)
1559 gb_connection_disable(svc->connection);
1562 * The SVC device and input device may have been registered
1563 * from the request handler.
1565 if (device_is_registered(&svc->dev)) {
1566 gb_svc_debugfs_exit(svc);
1567 gb_svc_watchdog_destroy(svc);
1568 input_unregister_device(svc->input);
1569 device_del(&svc->dev);
1572 flush_workqueue(svc->wq);
1574 gb_svc_remove_modules(svc);
1577 void gb_svc_put(struct gb_svc *svc)
1579 put_device(&svc->dev);