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-rw-r--r--drivers/media/video/uvc/uvc_ctrl.c76
-rw-r--r--drivers/media/video/uvc/uvc_v4l2.c4
-rw-r--r--drivers/media/video/uvc/uvcvideo.h5
3 files changed, 71 insertions, 14 deletions
diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c
index 335cb00e595..2208165aa6f 100644
--- a/drivers/media/video/uvc/uvc_ctrl.c
+++ b/drivers/media/video/uvc/uvc_ctrl.c
@@ -327,6 +327,31 @@ static struct uvc_menu_info exposure_auto_controls[] = {
{ 8, "Aperture Priority Mode" },
};
+static __s32 uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping,
+ __u8 query, const __u8 *data)
+{
+ __s8 zoom = (__s8)data[0];
+
+ switch (query) {
+ case GET_CUR:
+ return (zoom == 0) ? 0 : (zoom > 0 ? data[2] : -data[2]);
+
+ case GET_MIN:
+ case GET_MAX:
+ case GET_RES:
+ case GET_DEF:
+ default:
+ return data[2];
+ }
+}
+
+static void uvc_ctrl_set_zoom(struct uvc_control_mapping *mapping,
+ __s32 value, __u8 *data)
+{
+ data[0] = value == 0 ? 0 : (value > 0) ? 1 : 0xff;
+ data[2] = min(abs(value), 0xff);
+}
+
static struct uvc_control_mapping uvc_ctrl_mappings[] = {
{
.id = V4L2_CID_BRIGHTNESS,
@@ -533,6 +558,28 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = {
.data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
},
{
+ .id = V4L2_CID_ZOOM_ABSOLUTE,
+ .name = "Zoom, Absolute",
+ .entity = UVC_GUID_UVC_CAMERA,
+ .selector = CT_ZOOM_ABSOLUTE_CONTROL,
+ .size = 16,
+ .offset = 0,
+ .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
+ .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
+ },
+ {
+ .id = V4L2_CID_ZOOM_CONTINUOUS,
+ .name = "Zoom, Continuous",
+ .entity = UVC_GUID_UVC_CAMERA,
+ .selector = CT_ZOOM_RELATIVE_CONTROL,
+ .size = 0,
+ .offset = 0,
+ .v4l2_type = V4L2_CTRL_TYPE_INTEGER,
+ .data_type = UVC_CTRL_DATA_TYPE_SIGNED,
+ .get = uvc_ctrl_get_zoom,
+ .set = uvc_ctrl_set_zoom,
+ },
+ {
.id = V4L2_CID_PRIVACY,
.name = "Privacy",
.entity = UVC_GUID_UVC_CAMERA,
@@ -568,8 +615,8 @@ static inline void uvc_clear_bit(__u8 *data, int bit)
* a signed 32bit integer. Sign extension will be performed if the mapping
* references a signed data type.
*/
-static __s32 uvc_get_le_value(const __u8 *data,
- struct uvc_control_mapping *mapping)
+static __s32 uvc_get_le_value(struct uvc_control_mapping *mapping,
+ __u8 query, const __u8 *data)
{
int bits = mapping->size;
int offset = mapping->offset;
@@ -598,8 +645,8 @@ static __s32 uvc_get_le_value(const __u8 *data,
/* Set the bit string specified by mapping->offset and mapping->size
* in the little-endian data stored at 'data' to the value 'value'.
*/
-static void uvc_set_le_value(__s32 value, __u8 *data,
- struct uvc_control_mapping *mapping)
+static void uvc_set_le_value(struct uvc_control_mapping *mapping,
+ __s32 value, __u8 *data)
{
int bits = mapping->size;
int offset = mapping->offset;
@@ -751,7 +798,7 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
video->dev->intfnum, ctrl->info->selector,
data, ctrl->info->size)) < 0)
goto out;
- v4l2_ctrl->default_value = uvc_get_le_value(data, mapping);
+ v4l2_ctrl->default_value = mapping->get(mapping, GET_DEF, data);
}
switch (mapping->v4l2_type) {
@@ -787,21 +834,21 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
video->dev->intfnum, ctrl->info->selector,
data, ctrl->info->size)) < 0)
goto out;
- v4l2_ctrl->minimum = uvc_get_le_value(data, mapping);
+ v4l2_ctrl->minimum = mapping->get(mapping, GET_MIN, data);
}
if (ctrl->info->flags & UVC_CONTROL_GET_MAX) {
if ((ret = uvc_query_ctrl(video->dev, GET_MAX, ctrl->entity->id,
video->dev->intfnum, ctrl->info->selector,
data, ctrl->info->size)) < 0)
goto out;
- v4l2_ctrl->maximum = uvc_get_le_value(data, mapping);
+ v4l2_ctrl->maximum = mapping->get(mapping, GET_MAX, data);
}
if (ctrl->info->flags & UVC_CONTROL_GET_RES) {
if ((ret = uvc_query_ctrl(video->dev, GET_RES, ctrl->entity->id,
video->dev->intfnum, ctrl->info->selector,
data, ctrl->info->size)) < 0)
goto out;
- v4l2_ctrl->step = uvc_get_le_value(data, mapping);
+ v4l2_ctrl->step = mapping->get(mapping, GET_RES, data);
}
ret = 0;
@@ -938,8 +985,8 @@ int uvc_ctrl_get(struct uvc_video_device *video,
ctrl->loaded = 1;
}
- xctrl->value = uvc_get_le_value(
- uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), mapping);
+ xctrl->value = mapping->get(mapping, GET_CUR,
+ uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT));
if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) {
menu = mapping->menu_info;
@@ -995,8 +1042,8 @@ int uvc_ctrl_set(struct uvc_video_device *video,
ctrl->info->size);
}
- uvc_set_le_value(value,
- uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), mapping);
+ mapping->set(mapping, value,
+ uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT));
ctrl->dirty = 1;
ctrl->modified = 1;
@@ -1272,6 +1319,11 @@ int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping)
struct uvc_control_mapping *map;
int ret = -EINVAL;
+ if (mapping->get == NULL)
+ mapping->get = uvc_get_le_value;
+ if (mapping->set == NULL)
+ mapping->set = uvc_set_le_value;
+
if (mapping->id & ~V4L2_CTRL_ID_MASK) {
uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s' with "
"invalid control id 0x%08x\n", mapping->name,
diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
index 7b1c1363583..2e1fd1b2a61 100644
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ b/drivers/media/video/uvc/uvc_v4l2.c
@@ -914,7 +914,7 @@ static int uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- info = kmalloc(sizeof *info, GFP_KERNEL);
+ info = kzalloc(sizeof *info, GFP_KERNEL);
if (info == NULL)
return -ENOMEM;
@@ -941,7 +941,7 @@ static int uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- map = kmalloc(sizeof *map, GFP_KERNEL);
+ map = kzalloc(sizeof *map, GFP_KERNEL);
if (map == NULL)
return -ENOMEM;
diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h
index 00d593776b8..2a5bdacbaf2 100644
--- a/drivers/media/video/uvc/uvcvideo.h
+++ b/drivers/media/video/uvc/uvcvideo.h
@@ -384,6 +384,11 @@ struct uvc_control_mapping {
struct uvc_menu_info *menu_info;
__u32 menu_count;
+
+ __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
+ const __u8 *data);
+ void (*set) (struct uvc_control_mapping *mapping, __s32 value,
+ __u8 *data);
};
struct uvc_control {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-20 12:48:32 +0000