From c5bf599bcaa4cba04f76ae9edce2d9766a9602fd Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@skynet.be>
Date: Thu, 2 Jul 2009 01:24:47 +0200
Subject: uvcvideo: Multiple streaming interfaces support
From: Laurent Pinchart <laurent.pinchart@skynet.be>
Restructure the UVC descriptors parsing code to handle multiple streaming
interfaces. The driver now creates a uvc_video_chain instance for each chain
detected in the UVC control interface descriptors, and tries to register one
video device per streaming endpoint.
Priority: normal
Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
---
linux/drivers/media/video/uvc/uvc_ctrl.c | 82 ++++++++++++++++----------------
1 file changed, 41 insertions(+), 41 deletions(-)
(limited to 'linux/drivers/media/video/uvc/uvc_ctrl.c')
diff --git a/linux/drivers/media/video/uvc/uvc_ctrl.c b/linux/drivers/media/video/uvc/uvc_ctrl.c
index 81928f838..57b6fe937 100644
--- a/linux/drivers/media/video/uvc/uvc_ctrl.c
+++ b/linux/drivers/media/video/uvc/uvc_ctrl.c
@@ -731,7 +731,7 @@ static void __uvc_find_control(struct uvc_entity *entity, __u32 v4l2_id,
}
}
-struct uvc_control *uvc_find_control(struct uvc_video_device *video,
+struct uvc_control *uvc_find_control(struct uvc_video_chain *chain,
__u32 v4l2_id, struct uvc_control_mapping **mapping)
{
struct uvc_control *ctrl = NULL;
@@ -744,17 +744,17 @@ struct uvc_control *uvc_find_control(struct uvc_video_device *video,
v4l2_id &= V4L2_CTRL_ID_MASK;
/* Find the control. */
- __uvc_find_control(video->processing, v4l2_id, mapping, &ctrl, next);
+ __uvc_find_control(chain->processing, v4l2_id, mapping, &ctrl, next);
if (ctrl && !next)
return ctrl;
- list_for_each_entry(entity, &video->iterms, chain) {
+ list_for_each_entry(entity, &chain->iterms, chain) {
__uvc_find_control(entity, v4l2_id, mapping, &ctrl, next);
if (ctrl && !next)
return ctrl;
}
- list_for_each_entry(entity, &video->extensions, chain) {
+ list_for_each_entry(entity, &chain->extensions, chain) {
__uvc_find_control(entity, v4l2_id, mapping, &ctrl, next);
if (ctrl && !next)
return ctrl;
@@ -767,7 +767,7 @@ struct uvc_control *uvc_find_control(struct uvc_video_device *video,
return ctrl;
}
-int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
+int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
struct v4l2_queryctrl *v4l2_ctrl)
{
struct uvc_control *ctrl;
@@ -777,7 +777,7 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
__u8 *data;
int ret;
- ctrl = uvc_find_control(video, v4l2_ctrl->id, &mapping);
+ ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping);
if (ctrl == NULL)
return -EINVAL;
@@ -795,9 +795,9 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
if (ctrl->info->flags & UVC_CONTROL_GET_DEF) {
- ret = uvc_query_ctrl(video->dev, UVC_GET_DEF, ctrl->entity->id,
- video->dev->intfnum, ctrl->info->selector, data,
- ctrl->info->size);
+ ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id,
+ chain->dev->intfnum, ctrl->info->selector,
+ data, ctrl->info->size);
if (ret < 0)
goto out;
v4l2_ctrl->default_value =
@@ -833,25 +833,25 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
}
if (ctrl->info->flags & UVC_CONTROL_GET_MIN) {
- ret = uvc_query_ctrl(video->dev, UVC_GET_MIN, ctrl->entity->id,
- video->dev->intfnum, ctrl->info->selector, data,
- ctrl->info->size);
+ ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id,
+ chain->dev->intfnum, ctrl->info->selector,
+ data, ctrl->info->size);
if (ret < 0)
goto out;
v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN, data);
}
if (ctrl->info->flags & UVC_CONTROL_GET_MAX) {
- ret = uvc_query_ctrl(video->dev, UVC_GET_MAX, ctrl->entity->id,
- video->dev->intfnum, ctrl->info->selector, data,
- ctrl->info->size);
+ ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id,
+ chain->dev->intfnum, ctrl->info->selector,
+ data, ctrl->info->size);
if (ret < 0)
goto out;
v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX, data);
}
if (ctrl->info->flags & UVC_CONTROL_GET_RES) {
- ret = uvc_query_ctrl(video->dev, UVC_GET_RES, ctrl->entity->id,
- video->dev->intfnum, ctrl->info->selector, data,
- ctrl->info->size);
+ ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id,
+ chain->dev->intfnum, ctrl->info->selector,
+ data, ctrl->info->size);
if (ret < 0)
goto out;
v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES, data);
@@ -888,9 +888,9 @@ out:
* (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the
* control lock.
*/
-int uvc_ctrl_begin(struct uvc_video_device *video)
+int uvc_ctrl_begin(struct uvc_video_chain *chain)
{
- return mutex_lock_interruptible(&video->ctrl_mutex) ? -ERESTARTSYS : 0;
+ return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0;
}
static int uvc_ctrl_commit_entity(struct uvc_device *dev,
@@ -940,34 +940,34 @@ static int uvc_ctrl_commit_entity(struct uvc_device *dev,
return 0;
}
-int __uvc_ctrl_commit(struct uvc_video_device *video, int rollback)
+int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback)
{
struct uvc_entity *entity;
int ret = 0;
/* Find the control. */
- ret = uvc_ctrl_commit_entity(video->dev, video->processing, rollback);
+ ret = uvc_ctrl_commit_entity(chain->dev, chain->processing, rollback);
if (ret < 0)
goto done;
- list_for_each_entry(entity, &video->iterms, chain) {
- ret = uvc_ctrl_commit_entity(video->dev, entity, rollback);
+ list_for_each_entry(entity, &chain->iterms, chain) {
+ ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback);
if (ret < 0)
goto done;
}
- list_for_each_entry(entity, &video->extensions, chain) {
- ret = uvc_ctrl_commit_entity(video->dev, entity, rollback);
+ list_for_each_entry(entity, &chain->extensions, chain) {
+ ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback);
if (ret < 0)
goto done;
}
done:
- mutex_unlock(&video->ctrl_mutex);
+ mutex_unlock(&chain->ctrl_mutex);
return ret;
}
-int uvc_ctrl_get(struct uvc_video_device *video,
+int uvc_ctrl_get(struct uvc_video_chain *chain,
struct v4l2_ext_control *xctrl)
{
struct uvc_control *ctrl;
@@ -976,13 +976,13 @@ int uvc_ctrl_get(struct uvc_video_device *video,
unsigned int i;
int ret;
- ctrl = uvc_find_control(video, xctrl->id, &mapping);
+ ctrl = uvc_find_control(chain, xctrl->id, &mapping);
if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0)
return -EINVAL;
if (!ctrl->loaded) {
- ret = uvc_query_ctrl(video->dev, UVC_GET_CUR, ctrl->entity->id,
- video->dev->intfnum, ctrl->info->selector,
+ ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id,
+ chain->dev->intfnum, ctrl->info->selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
ctrl->info->size);
if (ret < 0)
@@ -1007,7 +1007,7 @@ int uvc_ctrl_get(struct uvc_video_device *video,
return 0;
}
-int uvc_ctrl_set(struct uvc_video_device *video,
+int uvc_ctrl_set(struct uvc_video_chain *chain,
struct v4l2_ext_control *xctrl)
{
struct uvc_control *ctrl;
@@ -1015,7 +1015,7 @@ int uvc_ctrl_set(struct uvc_video_device *video,
s32 value = xctrl->value;
int ret;
- ctrl = uvc_find_control(video, xctrl->id, &mapping);
+ ctrl = uvc_find_control(chain, xctrl->id, &mapping);
if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_SET_CUR) == 0)
return -EINVAL;
@@ -1030,8 +1030,8 @@ int uvc_ctrl_set(struct uvc_video_device *video,
memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
0, ctrl->info->size);
} else {
- ret = uvc_query_ctrl(video->dev, UVC_GET_CUR,
- ctrl->entity->id, video->dev->intfnum,
+ ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR,
+ ctrl->entity->id, chain->dev->intfnum,
ctrl->info->selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
ctrl->info->size);
@@ -1060,7 +1060,7 @@ int uvc_ctrl_set(struct uvc_video_device *video,
* Dynamic controls
*/
-int uvc_xu_ctrl_query(struct uvc_video_device *video,
+int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
struct uvc_xu_control *xctrl, int set)
{
struct uvc_entity *entity;
@@ -1070,7 +1070,7 @@ int uvc_xu_ctrl_query(struct uvc_video_device *video,
int ret;
/* Find the extension unit. */
- list_for_each_entry(entity, &video->extensions, chain) {
+ list_for_each_entry(entity, &chain->extensions, chain) {
if (entity->id == xctrl->unit)
break;
}
@@ -1109,7 +1109,7 @@ int uvc_xu_ctrl_query(struct uvc_video_device *video,
(!set && !(ctrl->info->flags & UVC_CONTROL_GET_CUR)))
return -EINVAL;
- if (mutex_lock_interruptible(&video->ctrl_mutex))
+ if (mutex_lock_interruptible(&chain->ctrl_mutex))
return -ERESTARTSYS;
memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
@@ -1122,8 +1122,8 @@ int uvc_xu_ctrl_query(struct uvc_video_device *video,
goto out;
}
- ret = uvc_query_ctrl(video->dev, set ? UVC_SET_CUR : UVC_GET_CUR,
- xctrl->unit, video->dev->intfnum, xctrl->selector,
+ ret = uvc_query_ctrl(chain->dev, set ? UVC_SET_CUR : UVC_GET_CUR,
+ xctrl->unit, chain->dev->intfnum, xctrl->selector,
data, xctrl->size);
if (ret < 0)
goto out;
@@ -1139,7 +1139,7 @@ out:
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
xctrl->size);
- mutex_unlock(&video->ctrl_mutex);
+ mutex_unlock(&chain->ctrl_mutex);
return ret;
}
--
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