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V4L/DVB: uvcvideo: Define control information bits using macros

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Use the macros instead of hardcoding numerical constants for the
controls information bitfield.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart 2010-06-17 11:11:51 -03:00 committed by Mauro Carvalho Chehab
parent 561474c2d2
commit 1b4e21c4f6
2 changed files with 13 additions and 6 deletions
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12
drivers/media/video/uvc/uvc_ctrl.c
View File

@ -1324,9 +1324,8 @@ static void uvc_ctrl_add_ctrl(struct uvc_device *dev,
/* Check if the device control information and length match
* the user supplied information.
*/
__u32 flags;
__le16 size;
__u8 inf;
__u8 _info;
ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id,
dev->intfnum, info->selector, (__u8 *)&size, 2);
@ -1345,7 +1344,7 @@ static void uvc_ctrl_add_ctrl(struct uvc_device *dev,
}
ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id,
dev->intfnum, info->selector, &inf, 1);
dev->intfnum, info->selector, &_info, 1);
if (ret < 0) {
uvc_trace(UVC_TRACE_CONTROL,
"GET_INFO failed on control %pUl/%u (%d).\n",
@ -1353,9 +1352,10 @@ static void uvc_ctrl_add_ctrl(struct uvc_device *dev,
return;
}
flags = info->flags;
if (((flags & UVC_CONTROL_GET_CUR) && !(inf & (1 << 0))) ||
((flags & UVC_CONTROL_SET_CUR) && !(inf & (1 << 1)))) {
if (((info->flags & UVC_CONTROL_GET_CUR) &&
!(_info & UVC_CONTROL_CAP_GET)) ||
((info->flags & UVC_CONTROL_SET_CUR) &&
!(_info & UVC_CONTROL_CAP_SET))) {
uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u flags "
"don't match supported operations.\n",
info->entity, info->selector);

7
include/linux/usb/video.h
View File

@ -160,5 +160,12 @@
#define UVC_STATUS_TYPE_CONTROL 1
#define UVC_STATUS_TYPE_STREAMING 2
/* 4.1.2. Control Capabilities */
#define UVC_CONTROL_CAP_GET (1 << 0)
#define UVC_CONTROL_CAP_SET (1 << 1)
#define UVC_CONTROL_CAP_DISABLED (1 << 2)
#define UVC_CONTROL_CAP_AUTOUPDATE (1 << 3)
#define UVC_CONTROL_CAP_ASYNCHRONOUS (1 << 4)
#endif /* __LINUX_USB_VIDEO_H */