usb/uvc/uvc_driver.c

136 	struct uvc_entity *entity;
138 	list_for_each_entry(entity, &dev->entities, list) {
139 		if (entity->id == id)
140 			return entity;
147 	int id, struct uvc_entity *entity)
151 	if (entity == NULL)
152 		entity = list_entry(&dev->entities, struct uvc_entity, list);
154 	list_for_each_entry_continue(entity, &dev->entities, list) {
155 		for (i = 0; i < entity->bNrInPins; ++i)
156 			if (entity->baSourceID[i] == id)
157 				return entity;
771 	struct uvc_entity *entity;
776 	extra_size = roundup(extra_size, sizeof(*entity->pads));
781 	size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
783 	entity = kzalloc(size, GFP_KERNEL);
784 	if (entity == NULL)
787 	entity->id = id;
788 	entity->type = type;
791 	 * Set the GUID for standard entity types. For extension units, the GUID
796 		memcpy(entity->guid, uvc_gpio_guid, 16);
799 		memcpy(entity->guid, uvc_camera_guid, 16);
802 		memcpy(entity->guid, uvc_media_transport_input_guid, 16);
805 		memcpy(entity->guid, uvc_processing_guid, 16);
809 	entity->num_links = 0;
810 	entity->num_pads = num_pads;
811 	entity->pads = ((void *)(entity + 1)) + extra_size;
814 		entity->pads[i].flags = MEDIA_PAD_FL_SINK;
815 	if (!UVC_ENTITY_IS_OTERM(entity) && num_pads)
816 		entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
818 	entity->bNrInPins = num_inputs;
819 	entity->baSourceID = (u8 *)(&entity->pads[num_pads]);
821 	return entity;
824 static void uvc_entity_set_name(struct uvc_device *dev, struct uvc_entity *entity,
830 	 * First attempt to read the entity name from the device. If the entity
833 	 * the entity type.
836 		ret = usb_string(dev->udev, string_id, entity->name,
837 				 sizeof(entity->name));
842 	sprintf(entity->name, "%s %u", type_name, entity->id);
1238 static int uvc_gpio_get_cur(struct uvc_device *dev, struct uvc_entity *entity,
1244 	*(u8 *)data = gpiod_get_value_cansleep(entity->gpio.gpio_privacy);
1249 static int uvc_gpio_get_info(struct uvc_device *dev, struct uvc_entity *entity,
1348 	struct uvc_entity *entity)
1350 	switch (UVC_ENTITY_TYPE(entity)) {
1352 		uvc_dbg_cont(PROBE, " <- XU %d", entity->id);
1354 		if (entity->bNrInPins != 1) {
1357 				entity->id);
1364 		uvc_dbg_cont(PROBE, " <- PU %d", entity->id);
1372 		chain->processing = entity;
1376 		uvc_dbg_cont(PROBE, " <- SU %d", entity->id);
1379 		if (entity->bNrInPins == 1)
1388 		chain->selector = entity;
1394 		uvc_dbg_cont(PROBE, " <- IT %d\n", entity->id);
1401 		uvc_dbg_cont(PROBE, " OT %d", entity->id);
1406 		if (UVC_ENTITY_IS_ITERM(entity))
1407 			uvc_dbg_cont(PROBE, " <- IT %d\n", entity->id);
1409 			uvc_dbg_cont(PROBE, " OT %d", entity->id);
1415 			"Unsupported entity type 0x%04x found in chain\n",
1416 			UVC_ENTITY_TYPE(entity));
1420 	list_add_tail(&entity->chain, &chain->entities);
1425 	struct uvc_entity *entity, struct uvc_entity *prev)
1435 		forward = uvc_entity_by_reference(chain->dev, entity->id,
1443 				"Found reference to entity %d already in chain\n",
1461 			 * can't be connected to any entity in the forward
1467 			if (UVC_ENTITY_IS_OTERM(entity)) {
1471 							  entity->baSourceID[0]);
1501 			if (UVC_ENTITY_IS_OTERM(entity)) {
1504 					entity->id, forward->id);
1526 	struct uvc_entity *entity = *_entity;
1530 	switch (UVC_ENTITY_TYPE(entity)) {
1533 		id = entity->baSourceID[0];
1538 		if (entity->bNrInPins == 1) {
1539 			id = entity->baSourceID[0];
1545 		chain->selector = entity;
1546 		for (i = 0; i < entity->bNrInPins; ++i) {
1547 			id = entity->baSourceID[i];
1552 					entity->id, i);
1558 					"Found reference to entity %d already in chain\n",
1566 			uvc_scan_chain_forward(chain, term, entity);
1581 		id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
1590 	entity = uvc_entity_by_id(chain->dev, id);
1591 	if (entity == NULL) {
1593 			"Found reference to unknown entity %d\n", id);
1597 	*_entity = entity;
1604 	struct uvc_entity *entity, *prev;
1608 	entity = term;
1611 	while (entity != NULL) {
1613 		if (entity->chain.next || entity->chain.prev) {
1615 				"Found reference to entity %d already in chain\n",
1616 				entity->id);
1620 		/* Process entity */
1621 		if (uvc_scan_chain_entity(chain, entity) < 0)
1625 		if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1629 		prev = entity;
1630 		if (uvc_scan_chain_backward(chain, &entity) < 0)
1707 	struct uvc_entity *entity;
1714 	list_for_each_entry(entity, &dev->entities, list) {
1715 		if (UVC_ENTITY_IS_ITERM(entity)) {
1718 			iterm = entity;
1721 		if (UVC_ENTITY_IS_OTERM(entity)) {
1724 			oterm = entity;
1748 	list_for_each_entry_reverse(entity, &dev->entities, list) {
1749 		if (entity->type != UVC_VC_PROCESSING_UNIT &&
1750 		    entity->type != UVC_VC_EXTENSION_UNIT)
1753 		if (entity->num_pads != 2)
1756 		if (uvc_scan_chain_entity(chain, entity) < 0)
1759 		prev->baSourceID[0] = entity->id;
1760 		prev = entity;
1828 	/* Add GPIO entity to the first chain. */
1875 		struct uvc_entity *entity;
1877 		entity = list_entry(p, struct uvc_entity, list);
1879 		uvc_mc_cleanup_entity(entity);
1881 		kfree(entity);