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_quiescing(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
442 u8 intf2_id, u16 cport2_id)
444 /* FIXME: implement */
446 dev_dbg(&svc->dev, "%s - (%u:%u %u:%u)\n", __func__,
447 intf1_id, cport1_id, intf2_id, cport2_id);
449 EXPORT_SYMBOL_GPL(gb_svc_connection_quiescing);
451 void gb_svc_connection_destroy(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
452 u8 intf2_id, u16 cport2_id)
454 struct gb_svc_conn_destroy_request request;
455 struct gb_connection *connection = svc->connection;
458 request.intf1_id = intf1_id;
459 request.cport1_id = cpu_to_le16(cport1_id);
460 request.intf2_id = intf2_id;
461 request.cport2_id = cpu_to_le16(cport2_id);
463 ret = gb_operation_sync(connection, GB_SVC_TYPE_CONN_DESTROY,
464 &request, sizeof(request), NULL, 0);
466 dev_err(&svc->dev, "failed to destroy connection (%u:%u %u:%u): %d\n",
467 intf1_id, cport1_id, intf2_id, cport2_id, ret);
470 EXPORT_SYMBOL_GPL(gb_svc_connection_destroy);
472 int gb_svc_timesync_enable(struct gb_svc *svc, u8 count, u64 frame_time,
473 u32 strobe_delay, u32 refclk)
475 struct gb_connection *connection = svc->connection;
476 struct gb_svc_timesync_enable_request request;
478 request.count = count;
479 request.frame_time = cpu_to_le64(frame_time);
480 request.strobe_delay = cpu_to_le32(strobe_delay);
481 request.refclk = cpu_to_le32(refclk);
482 return gb_operation_sync(connection,
483 GB_SVC_TYPE_TIMESYNC_ENABLE,
484 &request, sizeof(request), NULL, 0);
486 EXPORT_SYMBOL_GPL(gb_svc_timesync_enable);
488 int gb_svc_timesync_disable(struct gb_svc *svc)
490 struct gb_connection *connection = svc->connection;
492 return gb_operation_sync(connection,
493 GB_SVC_TYPE_TIMESYNC_DISABLE,
496 EXPORT_SYMBOL_GPL(gb_svc_timesync_disable);
498 int gb_svc_timesync_authoritative(struct gb_svc *svc, u64 *frame_time)
500 struct gb_connection *connection = svc->connection;
501 struct gb_svc_timesync_authoritative_response response;
504 ret = gb_operation_sync(connection,
505 GB_SVC_TYPE_TIMESYNC_AUTHORITATIVE, NULL, 0,
506 &response, sizeof(response));
510 for (i = 0; i < GB_TIMESYNC_MAX_STROBES; i++)
511 frame_time[i] = le64_to_cpu(response.frame_time[i]);
514 EXPORT_SYMBOL_GPL(gb_svc_timesync_authoritative);
516 int gb_svc_timesync_ping(struct gb_svc *svc, u64 *frame_time)
518 struct gb_connection *connection = svc->connection;
519 struct gb_svc_timesync_ping_response response;
522 ret = gb_operation_sync(connection,
523 GB_SVC_TYPE_TIMESYNC_PING,
525 &response, sizeof(response));
529 *frame_time = le64_to_cpu(response.frame_time);
532 EXPORT_SYMBOL_GPL(gb_svc_timesync_ping);
534 int gb_svc_timesync_wake_pins_acquire(struct gb_svc *svc, u32 strobe_mask)
536 struct gb_connection *connection = svc->connection;
537 struct gb_svc_timesync_wake_pins_acquire_request request;
539 request.strobe_mask = cpu_to_le32(strobe_mask);
540 return gb_operation_sync(connection,
541 GB_SVC_TYPE_TIMESYNC_WAKE_PINS_ACQUIRE,
542 &request, sizeof(request),
545 EXPORT_SYMBOL_GPL(gb_svc_timesync_wake_pins_acquire);
547 int gb_svc_timesync_wake_pins_release(struct gb_svc *svc)
549 struct gb_connection *connection = svc->connection;
551 return gb_operation_sync(connection,
552 GB_SVC_TYPE_TIMESYNC_WAKE_PINS_RELEASE,
555 EXPORT_SYMBOL_GPL(gb_svc_timesync_wake_pins_release);
557 /* Creates bi-directional routes between the devices */
558 int gb_svc_route_create(struct gb_svc *svc, u8 intf1_id, u8 dev1_id,
559 u8 intf2_id, u8 dev2_id)
561 struct gb_svc_route_create_request request;
563 request.intf1_id = intf1_id;
564 request.dev1_id = dev1_id;
565 request.intf2_id = intf2_id;
566 request.dev2_id = dev2_id;
568 return gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_CREATE,
569 &request, sizeof(request), NULL, 0);
572 /* Destroys bi-directional routes between the devices */
573 void gb_svc_route_destroy(struct gb_svc *svc, u8 intf1_id, u8 intf2_id)
575 struct gb_svc_route_destroy_request request;
578 request.intf1_id = intf1_id;
579 request.intf2_id = intf2_id;
581 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_DESTROY,
582 &request, sizeof(request), NULL, 0);
584 dev_err(&svc->dev, "failed to destroy route (%u %u): %d\n",
585 intf1_id, intf2_id, ret);
589 int gb_svc_intf_set_power_mode(struct gb_svc *svc, u8 intf_id, u8 hs_series,
590 u8 tx_mode, u8 tx_gear, u8 tx_nlanes,
591 u8 rx_mode, u8 rx_gear, u8 rx_nlanes,
592 u8 flags, u32 quirks)
594 struct gb_svc_intf_set_pwrm_request request;
595 struct gb_svc_intf_set_pwrm_response response;
598 request.intf_id = intf_id;
599 request.hs_series = hs_series;
600 request.tx_mode = tx_mode;
601 request.tx_gear = tx_gear;
602 request.tx_nlanes = tx_nlanes;
603 request.rx_mode = rx_mode;
604 request.rx_gear = rx_gear;
605 request.rx_nlanes = rx_nlanes;
606 request.flags = flags;
607 request.quirks = cpu_to_le32(quirks);
609 ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_SET_PWRM,
610 &request, sizeof(request),
611 &response, sizeof(response));
615 return le16_to_cpu(response.result_code);
617 EXPORT_SYMBOL_GPL(gb_svc_intf_set_power_mode);
619 int gb_svc_ping(struct gb_svc *svc)
621 return gb_operation_sync_timeout(svc->connection, GB_SVC_TYPE_PING,
623 GB_OPERATION_TIMEOUT_DEFAULT * 2);
625 EXPORT_SYMBOL_GPL(gb_svc_ping);
627 static int gb_svc_version_request(struct gb_operation *op)
629 struct gb_connection *connection = op->connection;
630 struct gb_svc *svc = gb_connection_get_data(connection);
631 struct gb_svc_version_request *request;
632 struct gb_svc_version_response *response;
634 if (op->request->payload_size < sizeof(*request)) {
635 dev_err(&svc->dev, "short version request (%zu < %zu)\n",
636 op->request->payload_size,
641 request = op->request->payload;
643 if (request->major > GB_SVC_VERSION_MAJOR) {
644 dev_warn(&svc->dev, "unsupported major version (%u > %u)\n",
645 request->major, GB_SVC_VERSION_MAJOR);
649 svc->protocol_major = request->major;
650 svc->protocol_minor = request->minor;
652 if (!gb_operation_response_alloc(op, sizeof(*response), GFP_KERNEL))
655 response = op->response->payload;
656 response->major = svc->protocol_major;
657 response->minor = svc->protocol_minor;
662 static ssize_t pwr_debugfs_voltage_read(struct file *file, char __user *buf,
663 size_t len, loff_t *offset)
665 struct svc_debugfs_pwrmon_rail *pwrmon_rails = file->f_inode->i_private;
666 struct gb_svc *svc = pwrmon_rails->svc;
671 ret = gb_svc_pwrmon_sample_get(svc, pwrmon_rails->id,
672 GB_SVC_PWRMON_TYPE_VOL, &value);
675 "failed to get voltage sample %u: %d\n",
676 pwrmon_rails->id, ret);
680 desc = scnprintf(buff, sizeof(buff), "%u\n", value);
682 return simple_read_from_buffer(buf, len, offset, buff, desc);
685 static ssize_t pwr_debugfs_current_read(struct file *file, char __user *buf,
686 size_t len, loff_t *offset)
688 struct svc_debugfs_pwrmon_rail *pwrmon_rails = file->f_inode->i_private;
689 struct gb_svc *svc = pwrmon_rails->svc;
694 ret = gb_svc_pwrmon_sample_get(svc, pwrmon_rails->id,
695 GB_SVC_PWRMON_TYPE_CURR, &value);
698 "failed to get current sample %u: %d\n",
699 pwrmon_rails->id, ret);
703 desc = scnprintf(buff, sizeof(buff), "%u\n", value);
705 return simple_read_from_buffer(buf, len, offset, buff, desc);
708 static ssize_t pwr_debugfs_power_read(struct file *file, char __user *buf,
709 size_t len, loff_t *offset)
711 struct svc_debugfs_pwrmon_rail *pwrmon_rails = file->f_inode->i_private;
712 struct gb_svc *svc = pwrmon_rails->svc;
717 ret = gb_svc_pwrmon_sample_get(svc, pwrmon_rails->id,
718 GB_SVC_PWRMON_TYPE_PWR, &value);
720 dev_err(&svc->dev, "failed to get power sample %u: %d\n",
721 pwrmon_rails->id, ret);
725 desc = scnprintf(buff, sizeof(buff), "%u\n", value);
727 return simple_read_from_buffer(buf, len, offset, buff, desc);
730 static const struct file_operations pwrmon_debugfs_voltage_fops = {
731 .read = pwr_debugfs_voltage_read,
734 static const struct file_operations pwrmon_debugfs_current_fops = {
735 .read = pwr_debugfs_current_read,
738 static const struct file_operations pwrmon_debugfs_power_fops = {
739 .read = pwr_debugfs_power_read,
742 static void gb_svc_pwrmon_debugfs_init(struct gb_svc *svc)
747 struct gb_svc_pwrmon_rail_names_get_response *rail_names;
750 dent = debugfs_create_dir("pwrmon", svc->debugfs_dentry);
751 if (IS_ERR_OR_NULL(dent))
754 if (gb_svc_pwrmon_rail_count_get(svc, &rail_count))
755 goto err_pwrmon_debugfs;
757 if (!rail_count || rail_count > GB_SVC_PWRMON_MAX_RAIL_COUNT)
758 goto err_pwrmon_debugfs;
760 bufsize = GB_SVC_PWRMON_RAIL_NAME_BUFSIZE * rail_count;
762 rail_names = kzalloc(bufsize, GFP_KERNEL);
764 goto err_pwrmon_debugfs;
766 svc->pwrmon_rails = kcalloc(rail_count, sizeof(*svc->pwrmon_rails),
768 if (!svc->pwrmon_rails)
769 goto err_pwrmon_debugfs_free;
771 if (gb_svc_pwrmon_rail_names_get(svc, rail_names, bufsize))
772 goto err_pwrmon_debugfs_free;
774 for (i = 0; i < rail_count; i++) {
776 struct svc_debugfs_pwrmon_rail *rail = &svc->pwrmon_rails[i];
777 char fname[GB_SVC_PWRMON_RAIL_NAME_BUFSIZE];
779 snprintf(fname, sizeof(fname), "%s",
780 (char *)&rail_names->name[i]);
785 dir = debugfs_create_dir(fname, dent);
786 debugfs_create_file("voltage_now", S_IRUGO, dir, rail,
787 &pwrmon_debugfs_voltage_fops);
788 debugfs_create_file("current_now", S_IRUGO, dir, rail,
789 &pwrmon_debugfs_current_fops);
790 debugfs_create_file("power_now", S_IRUGO, dir, rail,
791 &pwrmon_debugfs_power_fops);
797 err_pwrmon_debugfs_free:
799 kfree(svc->pwrmon_rails);
800 svc->pwrmon_rails = NULL;
803 debugfs_remove(dent);
806 static void gb_svc_debugfs_init(struct gb_svc *svc)
808 svc->debugfs_dentry = debugfs_create_dir(dev_name(&svc->dev),
810 gb_svc_pwrmon_debugfs_init(svc);
813 static void gb_svc_debugfs_exit(struct gb_svc *svc)
815 debugfs_remove_recursive(svc->debugfs_dentry);
816 kfree(svc->pwrmon_rails);
817 svc->pwrmon_rails = NULL;
820 static int gb_svc_hello(struct gb_operation *op)
822 struct gb_connection *connection = op->connection;
823 struct gb_svc *svc = gb_connection_get_data(connection);
824 struct gb_svc_hello_request *hello_request;
827 if (op->request->payload_size < sizeof(*hello_request)) {
828 dev_warn(&svc->dev, "short hello request (%zu < %zu)\n",
829 op->request->payload_size,
830 sizeof(*hello_request));
834 hello_request = op->request->payload;
835 svc->endo_id = le16_to_cpu(hello_request->endo_id);
836 svc->ap_intf_id = hello_request->interface_id;
838 ret = device_add(&svc->dev);
840 dev_err(&svc->dev, "failed to register svc device: %d\n", ret);
844 ret = input_register_device(svc->input);
846 dev_err(&svc->dev, "failed to register input: %d\n", ret);
847 device_del(&svc->dev);
851 ret = gb_svc_watchdog_create(svc);
853 dev_err(&svc->dev, "failed to create watchdog: %d\n", ret);
854 input_unregister_device(svc->input);
855 device_del(&svc->dev);
859 gb_svc_debugfs_init(svc);
861 return gb_svc_queue_deferred_request(op);
864 static struct gb_interface *gb_svc_interface_lookup(struct gb_svc *svc,
867 struct gb_host_device *hd = svc->hd;
868 struct gb_module *module;
869 size_t num_interfaces;
872 list_for_each_entry(module, &hd->modules, hd_node) {
873 module_id = module->module_id;
874 num_interfaces = module->num_interfaces;
876 if (intf_id >= module_id &&
877 intf_id < module_id + num_interfaces) {
878 return module->interfaces[intf_id - module_id];
885 static struct gb_module *gb_svc_module_lookup(struct gb_svc *svc, u8 module_id)
887 struct gb_host_device *hd = svc->hd;
888 struct gb_module *module;
890 list_for_each_entry(module, &hd->modules, hd_node) {
891 if (module->module_id == module_id)
898 static void gb_svc_intf_reenable(struct gb_svc *svc, struct gb_interface *intf)
902 mutex_lock(&intf->mutex);
904 /* Mark as disconnected to prevent I/O during disable. */
905 intf->disconnected = true;
906 gb_interface_disable(intf);
907 intf->disconnected = false;
909 ret = gb_interface_enable(intf);
911 dev_err(&svc->dev, "failed to enable interface %u: %d\n",
912 intf->interface_id, ret);
914 gb_interface_deactivate(intf);
917 mutex_unlock(&intf->mutex);
920 static void gb_svc_process_hello_deferred(struct gb_operation *operation)
922 struct gb_connection *connection = operation->connection;
923 struct gb_svc *svc = gb_connection_get_data(connection);
927 * XXX This is a hack/work-around to reconfigure the APBridgeA-Switch
928 * link to PWM G2, 1 Lane, Slow Auto, so that it has sufficient
929 * bandwidth for 3 audio streams plus boot-over-UniPro of a hot-plugged
932 * The code should be removed once SW-2217, Heuristic for UniPro
933 * Power Mode Changes is resolved.
935 ret = gb_svc_intf_set_power_mode(svc, svc->ap_intf_id,
936 GB_SVC_UNIPRO_HS_SERIES_A,
937 GB_SVC_UNIPRO_SLOW_AUTO_MODE,
939 GB_SVC_UNIPRO_SLOW_AUTO_MODE,
945 "power mode change failed on AP to switch link: %d\n",
949 static void gb_svc_process_intf_hotplug(struct gb_operation *operation)
951 struct gb_svc_intf_hotplug_request *request;
952 struct gb_connection *connection = operation->connection;
953 struct gb_svc *svc = gb_connection_get_data(connection);
954 struct gb_host_device *hd = connection->hd;
955 struct gb_module *module;
959 /* The request message size has already been verified. */
960 request = operation->request->payload;
961 intf_id = request->intf_id;
963 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, intf_id);
965 /* All modules are considered 1x2 for now */
966 module = gb_svc_module_lookup(svc, intf_id);
968 dev_info(&svc->dev, "mode switch detected on interface %u\n",
971 return gb_svc_intf_reenable(svc, module->interfaces[0]);
974 module = gb_module_create(hd, intf_id, 1);
976 dev_err(&svc->dev, "failed to create module\n");
980 ret = gb_module_add(module);
982 gb_module_put(module);
986 list_add(&module->hd_node, &hd->modules);
989 static void gb_svc_process_intf_hot_unplug(struct gb_operation *operation)
991 struct gb_svc *svc = gb_connection_get_data(operation->connection);
992 struct gb_svc_intf_hot_unplug_request *request;
993 struct gb_module *module;
996 /* The request message size has already been verified. */
997 request = operation->request->payload;
998 intf_id = request->intf_id;
1000 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, intf_id);
1002 /* All modules are considered 1x2 for now */
1003 module = gb_svc_module_lookup(svc, intf_id);
1005 dev_warn(&svc->dev, "could not find hot-unplug interface %u\n",
1010 module->disconnected = true;
1012 gb_module_del(module);
1013 list_del(&module->hd_node);
1014 gb_module_put(module);
1017 static void gb_svc_process_module_inserted(struct gb_operation *operation)
1019 struct gb_svc_module_inserted_request *request;
1020 struct gb_connection *connection = operation->connection;
1021 struct gb_svc *svc = gb_connection_get_data(connection);
1022 struct gb_host_device *hd = svc->hd;
1023 struct gb_module *module;
1024 size_t num_interfaces;
1029 /* The request message size has already been verified. */
1030 request = operation->request->payload;
1031 module_id = request->primary_intf_id;
1032 num_interfaces = request->intf_count;
1033 flags = le16_to_cpu(request->flags);
1035 dev_dbg(&svc->dev, "%s - id = %u, num_interfaces = %zu, flags = 0x%04x\n",
1036 __func__, module_id, num_interfaces, flags);
1038 if (flags & GB_SVC_MODULE_INSERTED_FLAG_NO_PRIMARY) {
1039 dev_warn(&svc->dev, "no primary interface detected on module %u\n",
1043 module = gb_svc_module_lookup(svc, module_id);
1045 dev_warn(&svc->dev, "unexpected module-inserted event %u\n",
1050 module = gb_module_create(hd, module_id, num_interfaces);
1052 dev_err(&svc->dev, "failed to create module\n");
1056 ret = gb_module_add(module);
1058 gb_module_put(module);
1062 list_add(&module->hd_node, &hd->modules);
1065 static void gb_svc_process_module_removed(struct gb_operation *operation)
1067 struct gb_svc_module_removed_request *request;
1068 struct gb_connection *connection = operation->connection;
1069 struct gb_svc *svc = gb_connection_get_data(connection);
1070 struct gb_module *module;
1073 /* The request message size has already been verified. */
1074 request = operation->request->payload;
1075 module_id = request->primary_intf_id;
1077 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, module_id);
1079 module = gb_svc_module_lookup(svc, module_id);
1081 dev_warn(&svc->dev, "unexpected module-removed event %u\n",
1086 module->disconnected = true;
1088 gb_module_del(module);
1089 list_del(&module->hd_node);
1090 gb_module_put(module);
1093 static void gb_svc_process_intf_mailbox_event(struct gb_operation *operation)
1095 struct gb_svc_intf_mailbox_event_request *request;
1096 struct gb_connection *connection = operation->connection;
1097 struct gb_svc *svc = gb_connection_get_data(connection);
1098 struct gb_interface *intf;
1103 /* The request message size has already been verified. */
1104 request = operation->request->payload;
1105 intf_id = request->intf_id;
1106 result_code = le16_to_cpu(request->result_code);
1107 mailbox = le32_to_cpu(request->mailbox);
1109 dev_dbg(&svc->dev, "%s - id = %u, result = 0x%04x, mailbox = 0x%08x\n",
1110 __func__, intf_id, result_code, mailbox);
1112 intf = gb_svc_interface_lookup(svc, intf_id);
1114 dev_warn(&svc->dev, "unexpected mailbox event %u\n", intf_id);
1120 "mailbox event %u with UniPro error: 0x%04x\n",
1121 intf_id, result_code);
1122 goto err_disable_interface;
1125 if (mailbox != GB_SVC_INTF_MAILBOX_GREYBUS) {
1127 "mailbox event %u with unexected value: 0x%08x\n",
1129 goto err_disable_interface;
1132 dev_info(&svc->dev, "mode switch detected on interface %u\n", intf_id);
1134 gb_svc_intf_reenable(svc, intf);
1138 err_disable_interface:
1139 mutex_lock(&intf->mutex);
1140 gb_interface_disable(intf);
1141 gb_interface_deactivate(intf);
1142 mutex_unlock(&intf->mutex);
1145 static void gb_svc_process_deferred_request(struct work_struct *work)
1147 struct gb_svc_deferred_request *dr;
1148 struct gb_operation *operation;
1152 dr = container_of(work, struct gb_svc_deferred_request, work);
1153 operation = dr->operation;
1154 svc = gb_connection_get_data(operation->connection);
1155 type = operation->request->header->type;
1158 case GB_SVC_TYPE_SVC_HELLO:
1159 gb_svc_process_hello_deferred(operation);
1161 case GB_SVC_TYPE_INTF_HOTPLUG:
1162 gb_svc_process_intf_hotplug(operation);
1164 case GB_SVC_TYPE_INTF_HOT_UNPLUG:
1165 gb_svc_process_intf_hot_unplug(operation);
1167 case GB_SVC_TYPE_MODULE_INSERTED:
1168 gb_svc_process_module_inserted(operation);
1170 case GB_SVC_TYPE_MODULE_REMOVED:
1171 gb_svc_process_module_removed(operation);
1173 case GB_SVC_TYPE_INTF_MAILBOX_EVENT:
1174 gb_svc_process_intf_mailbox_event(operation);
1177 dev_err(&svc->dev, "bad deferred request type: 0x%02x\n", type);
1180 gb_operation_put(operation);
1184 static int gb_svc_queue_deferred_request(struct gb_operation *operation)
1186 struct gb_svc *svc = gb_connection_get_data(operation->connection);
1187 struct gb_svc_deferred_request *dr;
1189 dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1193 gb_operation_get(operation);
1195 dr->operation = operation;
1196 INIT_WORK(&dr->work, gb_svc_process_deferred_request);
1198 queue_work(svc->wq, &dr->work);
1204 * Bringing up a module can be time consuming, as that may require lots of
1205 * initialization on the module side. Over that, we may also need to download
1206 * the firmware first and flash that on the module.
1208 * In order not to make other svc events wait for all this to finish,
1209 * handle most of module hotplug stuff outside of the hotplug callback, with
1210 * help of a workqueue.
1212 static int gb_svc_intf_hotplug_recv(struct gb_operation *op)
1214 struct gb_svc *svc = gb_connection_get_data(op->connection);
1215 struct gb_svc_intf_hotplug_request *request;
1217 if (op->request->payload_size < sizeof(*request)) {
1218 dev_warn(&svc->dev, "short hotplug request received (%zu < %zu)\n",
1219 op->request->payload_size, sizeof(*request));
1223 request = op->request->payload;
1225 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, request->intf_id);
1227 return gb_svc_queue_deferred_request(op);
1230 static int gb_svc_intf_hot_unplug_recv(struct gb_operation *op)
1232 struct gb_svc *svc = gb_connection_get_data(op->connection);
1233 struct gb_svc_intf_hot_unplug_request *request;
1235 if (op->request->payload_size < sizeof(*request)) {
1236 dev_warn(&svc->dev, "short hot unplug request received (%zu < %zu)\n",
1237 op->request->payload_size, sizeof(*request));
1241 request = op->request->payload;
1243 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, request->intf_id);
1245 return gb_svc_queue_deferred_request(op);
1248 static int gb_svc_intf_reset_recv(struct gb_operation *op)
1250 struct gb_svc *svc = gb_connection_get_data(op->connection);
1251 struct gb_message *request = op->request;
1252 struct gb_svc_intf_reset_request *reset;
1255 if (request->payload_size < sizeof(*reset)) {
1256 dev_warn(&svc->dev, "short reset request received (%zu < %zu)\n",
1257 request->payload_size, sizeof(*reset));
1260 reset = request->payload;
1262 intf_id = reset->intf_id;
1264 /* FIXME Reset the interface here */
1269 static int gb_svc_key_code_map(struct gb_svc *svc, u16 key_code, u16 *code)
1272 case GB_KEYCODE_ARA:
1273 *code = SVC_KEY_ARA_BUTTON;
1276 dev_warn(&svc->dev, "unknown keycode received: %u\n", key_code);
1283 static int gb_svc_key_event_recv(struct gb_operation *op)
1285 struct gb_svc *svc = gb_connection_get_data(op->connection);
1286 struct gb_message *request = op->request;
1287 struct gb_svc_key_event_request *key;
1292 if (request->payload_size < sizeof(*key)) {
1293 dev_warn(&svc->dev, "short key request received (%zu < %zu)\n",
1294 request->payload_size, sizeof(*key));
1298 key = request->payload;
1300 ret = gb_svc_key_code_map(svc, le16_to_cpu(key->key_code), &code);
1304 event = key->key_event;
1305 if ((event != GB_SVC_KEY_PRESSED) && (event != GB_SVC_KEY_RELEASED)) {
1306 dev_warn(&svc->dev, "unknown key event received: %u\n", event);
1310 input_report_key(svc->input, code, (event == GB_SVC_KEY_PRESSED));
1311 input_sync(svc->input);
1316 static int gb_svc_module_inserted_recv(struct gb_operation *op)
1318 struct gb_svc *svc = gb_connection_get_data(op->connection);
1319 struct gb_svc_module_inserted_request *request;
1321 if (op->request->payload_size < sizeof(*request)) {
1322 dev_warn(&svc->dev, "short module-inserted request received (%zu < %zu)\n",
1323 op->request->payload_size, sizeof(*request));
1327 request = op->request->payload;
1329 dev_dbg(&svc->dev, "%s - id = %u\n", __func__,
1330 request->primary_intf_id);
1332 return gb_svc_queue_deferred_request(op);
1335 static int gb_svc_module_removed_recv(struct gb_operation *op)
1337 struct gb_svc *svc = gb_connection_get_data(op->connection);
1338 struct gb_svc_module_removed_request *request;
1340 if (op->request->payload_size < sizeof(*request)) {
1341 dev_warn(&svc->dev, "short module-removed request received (%zu < %zu)\n",
1342 op->request->payload_size, sizeof(*request));
1346 request = op->request->payload;
1348 dev_dbg(&svc->dev, "%s - id = %u\n", __func__,
1349 request->primary_intf_id);
1351 return gb_svc_queue_deferred_request(op);
1354 static int gb_svc_intf_mailbox_event_recv(struct gb_operation *op)
1356 struct gb_svc *svc = gb_connection_get_data(op->connection);
1357 struct gb_svc_intf_mailbox_event_request *request;
1359 if (op->request->payload_size < sizeof(*request)) {
1360 dev_warn(&svc->dev, "short mailbox request received (%zu < %zu)\n",
1361 op->request->payload_size, sizeof(*request));
1365 request = op->request->payload;
1367 dev_dbg(&svc->dev, "%s - id = %u\n", __func__, request->intf_id);
1369 return gb_svc_queue_deferred_request(op);
1372 static int gb_svc_request_handler(struct gb_operation *op)
1374 struct gb_connection *connection = op->connection;
1375 struct gb_svc *svc = gb_connection_get_data(connection);
1380 * SVC requests need to follow a specific order (at least initially) and
1381 * below code takes care of enforcing that. The expected order is:
1382 * - PROTOCOL_VERSION
1384 * - Any other request, but the earlier two.
1386 * Incoming requests are guaranteed to be serialized and so we don't
1387 * need to protect 'state' for any races.
1390 case GB_SVC_TYPE_PROTOCOL_VERSION:
1391 if (svc->state != GB_SVC_STATE_RESET)
1394 case GB_SVC_TYPE_SVC_HELLO:
1395 if (svc->state != GB_SVC_STATE_PROTOCOL_VERSION)
1399 if (svc->state != GB_SVC_STATE_SVC_HELLO)
1405 dev_warn(&svc->dev, "unexpected request 0x%02x received (state %u)\n",
1411 case GB_SVC_TYPE_PROTOCOL_VERSION:
1412 ret = gb_svc_version_request(op);
1414 svc->state = GB_SVC_STATE_PROTOCOL_VERSION;
1416 case GB_SVC_TYPE_SVC_HELLO:
1417 ret = gb_svc_hello(op);
1419 svc->state = GB_SVC_STATE_SVC_HELLO;
1421 case GB_SVC_TYPE_INTF_HOTPLUG:
1422 return gb_svc_intf_hotplug_recv(op);
1423 case GB_SVC_TYPE_INTF_HOT_UNPLUG:
1424 return gb_svc_intf_hot_unplug_recv(op);
1425 case GB_SVC_TYPE_INTF_RESET:
1426 return gb_svc_intf_reset_recv(op);
1427 case GB_SVC_TYPE_KEY_EVENT:
1428 return gb_svc_key_event_recv(op);
1429 case GB_SVC_TYPE_MODULE_INSERTED:
1430 return gb_svc_module_inserted_recv(op);
1431 case GB_SVC_TYPE_MODULE_REMOVED:
1432 return gb_svc_module_removed_recv(op);
1433 case GB_SVC_TYPE_INTF_MAILBOX_EVENT:
1434 return gb_svc_intf_mailbox_event_recv(op);
1436 dev_warn(&svc->dev, "unsupported request 0x%02x\n", type);
1441 static struct input_dev *gb_svc_input_create(struct gb_svc *svc)
1443 struct input_dev *input_dev;
1445 input_dev = input_allocate_device();
1447 return ERR_PTR(-ENOMEM);
1449 input_dev->name = dev_name(&svc->dev);
1450 svc->input_phys = kasprintf(GFP_KERNEL, "greybus-%s/input0",
1452 if (!svc->input_phys)
1453 goto err_free_input;
1455 input_dev->phys = svc->input_phys;
1456 input_dev->dev.parent = &svc->dev;
1458 input_set_drvdata(input_dev, svc);
1460 input_set_capability(input_dev, EV_KEY, SVC_KEY_ARA_BUTTON);
1465 input_free_device(svc->input);
1466 return ERR_PTR(-ENOMEM);
1469 static void gb_svc_release(struct device *dev)
1471 struct gb_svc *svc = to_gb_svc(dev);
1473 if (svc->connection)
1474 gb_connection_destroy(svc->connection);
1475 ida_destroy(&svc->device_id_map);
1476 destroy_workqueue(svc->wq);
1477 kfree(svc->input_phys);
1481 struct device_type greybus_svc_type = {
1482 .name = "greybus_svc",
1483 .release = gb_svc_release,
1486 struct gb_svc *gb_svc_create(struct gb_host_device *hd)
1490 svc = kzalloc(sizeof(*svc), GFP_KERNEL);
1494 svc->wq = alloc_workqueue("%s:svc", WQ_UNBOUND, 1, dev_name(&hd->dev));
1500 svc->dev.parent = &hd->dev;
1501 svc->dev.bus = &greybus_bus_type;
1502 svc->dev.type = &greybus_svc_type;
1503 svc->dev.groups = svc_groups;
1504 svc->dev.dma_mask = svc->dev.parent->dma_mask;
1505 device_initialize(&svc->dev);
1507 dev_set_name(&svc->dev, "%d-svc", hd->bus_id);
1509 ida_init(&svc->device_id_map);
1510 svc->state = GB_SVC_STATE_RESET;
1513 svc->input = gb_svc_input_create(svc);
1514 if (IS_ERR(svc->input)) {
1515 dev_err(&svc->dev, "failed to create input device: %ld\n",
1516 PTR_ERR(svc->input));
1517 goto err_put_device;
1520 svc->connection = gb_connection_create_static(hd, GB_SVC_CPORT_ID,
1521 gb_svc_request_handler);
1522 if (IS_ERR(svc->connection)) {
1523 dev_err(&svc->dev, "failed to create connection: %ld\n",
1524 PTR_ERR(svc->connection));
1525 goto err_free_input;
1528 gb_connection_set_data(svc->connection, svc);
1533 input_free_device(svc->input);
1535 put_device(&svc->dev);
1539 int gb_svc_add(struct gb_svc *svc)
1544 * The SVC protocol is currently driven by the SVC, so the SVC device
1545 * is added from the connection request handler when enough
1546 * information has been received.
1548 ret = gb_connection_enable(svc->connection);
1555 static void gb_svc_remove_modules(struct gb_svc *svc)
1557 struct gb_host_device *hd = svc->hd;
1558 struct gb_module *module, *tmp;
1560 list_for_each_entry_safe(module, tmp, &hd->modules, hd_node) {
1561 gb_module_del(module);
1562 list_del(&module->hd_node);
1563 gb_module_put(module);
1567 void gb_svc_del(struct gb_svc *svc)
1569 gb_connection_disable(svc->connection);
1572 * The SVC device and input device may have been registered
1573 * from the request handler.
1575 if (device_is_registered(&svc->dev)) {
1576 gb_svc_debugfs_exit(svc);
1577 gb_svc_watchdog_destroy(svc);
1578 input_unregister_device(svc->input);
1579 device_del(&svc->dev);
1582 flush_workqueue(svc->wq);
1584 gb_svc_remove_modules(svc);
1587 void gb_svc_put(struct gb_svc *svc)
1589 put_device(&svc->dev);