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path: root/drivers/media/video/uvc/uvc_ctrl.c
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Diffstat (limited to 'drivers/media/video/uvc/uvc_ctrl.c')
-rw-r--r--drivers/media/video/uvc/uvc_ctrl.c143
1 files changed, 129 insertions, 14 deletions
diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c
index f16aafe9cf14..2208165aa6f0 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,
@@ -532,6 +557,38 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = {
.v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
.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,
+ .selector = CT_PRIVACY_CONTROL,
+ .size = 1,
+ .offset = 0,
+ .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
+ .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
+ },
};
/* ------------------------------------------------------------------------
@@ -543,18 +600,23 @@ static inline __u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id)
return ctrl->data + id * ctrl->info->size;
}
-static inline int uvc_get_bit(const __u8 *data, int bit)
+static inline int uvc_test_bit(const __u8 *data, int bit)
{
return (data[bit >> 3] >> (bit & 7)) & 1;
}
+static inline void uvc_clear_bit(__u8 *data, int bit)
+{
+ data[bit >> 3] &= ~(1 << (bit & 7));
+}
+
/* Extract the bit string specified by mapping->offset and mapping->size
* from the little-endian data stored at 'data' and return the result as
* 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;
@@ -583,8 +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;
@@ -736,7 +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) {
@@ -772,21 +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;
@@ -923,8 +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;
@@ -980,8 +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;
@@ -1257,6 +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,
@@ -1306,6 +1373,51 @@ end:
}
/*
+ * Prune an entity of its bogus controls. This currently includes processing
+ * unit auto controls for which no corresponding manual control is available.
+ * Such auto controls make little sense if any, and are known to crash at
+ * least the SiGma Micro webcam.
+ */
+static void
+uvc_ctrl_prune_entity(struct uvc_entity *entity)
+{
+ static const struct {
+ u8 idx_manual;
+ u8 idx_auto;
+ } blacklist[] = {
+ { 2, 11 }, /* Hue */
+ { 6, 12 }, /* White Balance Temperature */
+ { 7, 13 }, /* White Balance Component */
+ };
+
+ u8 *controls;
+ unsigned int size;
+ unsigned int i;
+
+ if (UVC_ENTITY_TYPE(entity) != VC_PROCESSING_UNIT)
+ return;
+
+ controls = entity->processing.bmControls;
+ size = entity->processing.bControlSize;
+
+ for (i = 0; i < ARRAY_SIZE(blacklist); ++i) {
+ if (blacklist[i].idx_auto >= 8 * size ||
+ blacklist[i].idx_manual >= 8 * size)
+ continue;
+
+ if (!uvc_test_bit(controls, blacklist[i].idx_auto) ||
+ uvc_test_bit(controls, blacklist[i].idx_manual))
+ continue;
+
+ uvc_trace(UVC_TRACE_CONTROL, "Auto control %u/%u has no "
+ "matching manual control, removing it.\n", entity->id,
+ blacklist[i].idx_auto);
+
+ uvc_clear_bit(controls, blacklist[i].idx_auto);
+ }
+}
+
+/*
* Initialize device controls.
*/
int uvc_ctrl_init_device(struct uvc_device *dev)
@@ -1331,6 +1443,9 @@ int uvc_ctrl_init_device(struct uvc_device *dev)
bControlSize = entity->camera.bControlSize;
}
+ if (dev->quirks & UVC_QUIRK_PRUNE_CONTROLS)
+ uvc_ctrl_prune_entity(entity);
+
for (i = 0; i < bControlSize; ++i)
ncontrols += hweight8(bmControls[i]);
@@ -1345,7 +1460,7 @@ int uvc_ctrl_init_device(struct uvc_device *dev)
ctrl = entity->controls;
for (i = 0; i < bControlSize * 8; ++i) {
- if (uvc_get_bit(bmControls, i) == 0)
+ if (uvc_test_bit(bmControls, i) == 0)
continue;
ctrl->entity = entity;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 12:32:02 +0000