Lines Matching refs:control

25 control enumeration.
37 control mappings at runtime. These allow for individual XU controls or byte
41 triggers a read or write of the associated XU control.
43 The ioctl used to create these control mappings is called UVCIOC_CTRL_MAP.
45 beforehand (UVCIOC_CTRL_ADD) to pass XU control information to the UVC driver.
53 3. Driver specific XU control interface
61 directly map to the low-level UVC control requests.
63 In order to make such a request the UVC unit ID of the control's extension unit
64 and the control selector need to be known. This information either needs to be
69 Unless the control size is already known it is necessary to first make a
72 UVC_GET_CUR or UVC_SET_CUR are valid requests for a given control, a
87 The API doesn't currently provide a fine-grained access control facility. The
102 ---- UVCIOC_CTRL_MAP - Map a UVC control to a V4L2 control ----
107 	This ioctl creates a mapping between a UVC control or part of a UVC
108 	control and a V4L2 control. Once mappings are defined, userspace
109 	applications can access vendor-defined UVC control through the V4L2
110 	control API.
113 	structure with information about an existing UVC control defined with
114 	UVCIOC_CTRL_ADD and a new V4L2 control.
116 	A UVC control can be mapped to several V4L2 controls. For instance,
117 	a UVC pan/tilt control could be mapped to separate pan and tilt V4L2
118 	controls. The UVC control is divided into non overlapping fields using
120 	V4L2 control.
134 		No such UVC control.
136 		The requested offset and size would overflow the UVC control.
143 	__u32	id		V4L2 control identifier
144 	__u8	name[32]	V4L2 control name
146 	__u8	selector	UVC control selector
147 	__u8	size		V4L2 control size (in bits)
148 	__u8	offset		V4L2 control offset (in bits)
150 		v4l2_type	V4L2 control type
152 		data_type	UVC control data type
165 	UVC_CTRL_DATA_TYPE_RAW		Raw control (byte array)
173 ---- UVCIOC_CTRL_QUERY - Query a UVC XU control ----
178 	This ioctl queries a UVC XU control identified by its extension unit ID
179 	and control selector.
182 	correspond to the low-level control requests described in the UVC
186 		Obtain the current value of the control.
188 		Obtain the minimum value of the control.
190 		Obtain the maximum value of the control.
192 		Obtain the default value of the control.
194 		Query the resolution of the control, i.e. the step size of the
195 		allowed control values.
197 		Query the size of the control in bytes.
199 		Query the control information bitmap, which indicates whether
202 		Update the value of the control.
205 	control. Exceptions are the UVC_GET_LEN and UVC_GET_INFO queries, for
221 		The device does not support the given control or the specified
228 		The given request is not supported by the given control.