path: root/drivers/media/video/uvc/uvcvideo.h

#ifndef _USB_VIDEO_H_
#define _USB_VIDEO_H_

#include <linux/kernel.h>
#include <linux/videodev2.h>

#ifndef __KERNEL__
/*
 * This header provides binary compatibility with applications using the private
 * uvcvideo API. This API is deprecated and will be removed in 2.6.42.
 * Applications should be recompiled against the public linux/uvcvideo.h header.
 */
#warn "The uvcvideo.h header is deprecated, use linux/uvcvideo.h instead."

/*
 * Dynamic controls
 */

/* Data types for UVC control data */
#define UVC_CTRL_DATA_TYPE_RAW		0
#define UVC_CTRL_DATA_TYPE_SIGNED	1
#define UVC_CTRL_DATA_TYPE_UNSIGNED	2
#define UVC_CTRL_DATA_TYPE_BOOLEAN	3
#define UVC_CTRL_DATA_TYPE_ENUM		4
#define UVC_CTRL_DATA_TYPE_BITMASK	5

/* Control flags */
#define UVC_CONTROL_SET_CUR	(1 << 0)
#define UVC_CONTROL_GET_CUR	(1 << 1)
#define UVC_CONTROL_GET_MIN	(1 << 2)
#define UVC_CONTROL_GET_MAX	(1 << 3)
#define UVC_CONTROL_GET_RES	(1 << 4)
#define UVC_CONTROL_GET_DEF	(1 << 5)
#define UVC_CONTROL_RESTORE	(1 << 6)
#define UVC_CONTROL_AUTO_UPDATE	(1 << 7)

#define UVC_CONTROL_GET_RANGE	(UVC_CONTROL_GET_CUR | UVC_CONTROL_GET_MIN | \
				 UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES | \
				 UVC_CONTROL_GET_DEF)

struct uvc_menu_info {
	__u32 value;
	__u8 name[32];
};

struct uvc_xu_control_mapping {
	__u32 id;
	__u8 name[32];
	__u8 entity[16];
	__u8 selector;

	__u8 size;
	__u8 offset;
	__u32 v4l2_type;
	__u32 data_type;

	struct uvc_menu_info __user *menu_info;
	__u32 menu_count;

	__u32 reserved[4];
};

#endif

struct uvc_xu_control_info {
	__u8 entity[16];
	__u8 index;
	__u8 selector;
	__u16 size;
	__u32 flags;
};

struct uvc_xu_control_mapping_old {
	__u8 reserved[64];
};

struct uvc_xu_control {
	__u8 unit;
	__u8 selector;
	__u16 size;
	__u8 __user *data;
};

#ifndef __KERNEL__
#define UVCIOC_CTRL_ADD		_IOW('U', 1, struct uvc_xu_control_info)
#define UVCIOC_CTRL_MAP_OLD	_IOWR('U', 2, struct uvc_xu_control_mapping_old)
#define UVCIOC_CTRL_MAP		_IOWR('U', 2, struct uvc_xu_control_mapping)
#define UVCIOC_CTRL_GET		_IOWR('U', 3, struct uvc_xu_control)
#define UVCIOC_CTRL_SET		_IOW('U', 4, struct uvc_xu_control)
#else
#define __UVCIOC_CTRL_ADD	_IOW('U', 1, struct uvc_xu_control_info)
#define __UVCIOC_CTRL_MAP_OLD	_IOWR('U', 2, struct uvc_xu_control_mapping_old)
#define __UVCIOC_CTRL_MAP	_IOWR('U', 2, struct uvc_xu_control_mapping)
#define __UVCIOC_CTRL_GET	_IOWR('U', 3, struct uvc_xu_control)
#define __UVCIOC_CTRL_SET	_IOW('U', 4, struct uvc_xu_control)
#endif

#ifdef __KERNEL__

#include <linux/poll.h>
#include <linux/usb/video.h>
#include <linux/uvcvideo.h>

/* --------------------------------------------------------------------------
 * UVC constants
 */

#define UVC_TERM_INPUT			0x0000
#define UVC_TERM_OUTPUT			0x8000
#define UVC_TERM_DIRECTION(term)	((term)->type & 0x8000)

#define UVC_ENTITY_TYPE(entity)		((entity)->type & 0x7fff)
#define UVC_ENTITY_IS_UNIT(entity)	(((entity)->type & 0xff00) == 0)
#define UVC_ENTITY_IS_TERM(entity)	(((entity)->type & 0xff00) != 0)
#define UVC_ENTITY_IS_ITERM(entity) \
	(UVC_ENTITY_IS_TERM(entity) && \
	((entity)->type & 0x8000) == UVC_TERM_INPUT)
#define UVC_ENTITY_IS_OTERM(entity) \
	(UVC_ENTITY_IS_TERM(entity) && \
	((entity)->type & 0x8000) == UVC_TERM_OUTPUT)


/* ------------------------------------------------------------------------
 * GUIDs
 */
#define UVC_GUID_UVC_CAMERA \
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
#define UVC_GUID_UVC_OUTPUT \
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
#define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
#define UVC_GUID_UVC_PROCESSING \
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
#define UVC_GUID_UVC_SELECTOR \
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}

#define UVC_GUID_FORMAT_MJPEG \
	{ 'M',  'J',  'P',  'G', 0x00, 0x00, 0x10, 0x00, \
	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_YUY2 \
	{ 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_YUY2_ISIGHT \
	{ 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
	 0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_NV12 \
	{ 'N',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_YV12 \
	{ 'Y',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_I420 \
	{ 'I',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_UYVY \
	{ 'U',  'Y',  'V',  'Y', 0x00, 0x00, 0x10, 0x00, \
	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y800 \
	{ 'Y',  '8',  '0',  '0', 0x00, 0x00, 0x10, 0x00, \
	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y16 \
	{ 'Y',  '1',  '6',  ' ', 0x00, 0x00, 0x10, 0x00, \
	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_BY8 \
	{ 'B',  'Y',  '8',  ' ', 0x00, 0x00, 0x10, 0x00, \
	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_RGBP \
	{ 'R',  'G',  'B',  'P', 0x00, 0x00, 0x10, 0x00, \
	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}

/* ------------------------------------------------------------------------
 * Driver specific constants.
 */

#define DRIVER_VERSION_NUMBER	KERNEL_VERSION(1, 1, 0)
#define DRIVER_VERSION		"v1.1.0"

/* Number of isochronous URBs. */
#define UVC_URBS		5
/* Maximum number of packets per URB. */
#define UVC_MAX_PACKETS		32
/* Maximum number of video buffers. */
#define UVC_MAX_VIDEO_BUFFERS	32
/* Maximum status buffer size in bytes of interrupt URB. */
#define UVC_MAX_STATUS_SIZE	16

#define UVC_CTRL_CONTROL_TIMEOUT	300
#define UVC_CTRL_STREAMING_TIMEOUT	5000

/* Maximum allowed number of control mappings per device */
#define UVC_MAX_CONTROL_MAPPINGS	1024

/* Devices quirks */
#define UVC_QUIRK_STATUS_INTERVAL	0x00000001
#define UVC_QUIRK_PROBE_MINMAX		0x00000002
#define UVC_QUIRK_PROBE_EXTRAFIELDS	0x00000004
#define UVC_QUIRK_BUILTIN_ISIGHT	0x00000008
#define UVC_QUIRK_STREAM_NO_FID		0x00000010
#define UVC_QUIRK_IGNORE_SELECTOR_UNIT	0x00000020
#define UVC_QUIRK_FIX_BANDWIDTH		0x00000080
#define UVC_QUIRK_PROBE_DEF		0x00000100
#define UVC_QUIRK_RESTRICT_FRAME_RATE	0x00000200

/* Format flags */
#define UVC_FMT_FLAG_COMPRESSED		0x00000001
#define UVC_FMT_FLAG_STREAM		0x00000002

/* ------------------------------------------------------------------------
 * Structures.
 */

struct uvc_device;

/* TODO: Put the most frequently accessed fields at the beginning of
 * structures to maximize cache efficiency.
 */
struct uvc_control_info {
	struct list_head mappings;

	__u8 entity[16];
	__u8 index;	/* Bit index in bmControls */
	__u8 selector;

	__u16 size;
	__u32 flags;
};

struct uvc_control_mapping {
	struct list_head list;

	struct uvc_control_info *ctrl;

	__u32 id;
	__u8 name[32];
	__u8 entity[16];
	__u8 selector;

	__u8 size;
	__u8 offset;
	enum v4l2_ctrl_type v4l2_type;
	__u32 data_type;

	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 {
	struct uvc_entity *entity;
	struct uvc_control_info info;

	__u8 index;	/* Used to match the uvc_control entry with a
			   uvc_control_info. */
	__u8 dirty:1,
	     loaded:1,
	     modified:1,
	     cached:1,
	     initialized:1;

	__u8 *uvc_data;
};

struct uvc_format_desc {
	char *name;
	__u8 guid[16];
	__u32 fcc;
};

/* The term 'entity' refers to both UVC units and UVC terminals.
 *
 * The type field is either the terminal type (wTerminalType in the terminal
 * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
 * As the bDescriptorSubtype field is one byte long, the type value will
 * always have a null MSB for units. All terminal types defined by the UVC
 * specification have a non-null MSB, so it is safe to use the MSB to
 * differentiate between units and terminals as long as the descriptor parsing
 * code makes sure terminal types have a non-null MSB.
 *
 * For terminals, the type's most significant bit stores the terminal
 * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
 * always be accessed with the UVC_ENTITY_* macros and never directly.
 */

struct uvc_entity {
	struct list_head list;		/* Entity as part of a UVC device. */
	struct list_head chain;		/* Entity as part of a video device
					 * chain. */
	__u8 id;
	__u16 type;
	char name[64];

	union {
		struct {
			__u16 wObjectiveFocalLengthMin;
			__u16 wObjectiveFocalLengthMax;
			__u16 wOcularFocalLength;
			__u8  bControlSize;
			__u8  *bmControls;
		} camera;

		struct {
			__u8  bControlSize;
			__u8  *bmControls;
			__u8  bTransportModeSize;
			__u8  *bmTransportModes;
		} media;

		struct {
		} output;

		struct {
			__u16 wMaxMultiplier;
			__u8  bControlSize;
			__u8  *bmControls;
			__u8  bmVideoStandards;
		} processing;

		struct {
		} selector;

		struct {
			__u8  guidExtensionCode[16];
			__u8  bNumControls;
			__u8  bControlSize;
			__u8  *bmControls;
			__u8  *bmControlsType;
		} extension;
	};

	__u8 bNrInPins;
	__u8 *baSourceID;

	unsigned int ncontrols;
	struct uvc_control *controls;
};

struct uvc_frame {
	__u8  bFrameIndex;
	__u8  bmCapabilities;
	__u16 wWidth;
	__u16 wHeight;
	__u32 dwMinBitRate;
	__u32 dwMaxBitRate;
	__u32 dwMaxVideoFrameBufferSize;
	__u8  bFrameIntervalType;
	__u32 dwDefaultFrameInterval;
	__u32 *dwFrameInterval;
};

struct uvc_format {
	__u8 type;
	__u8 index;
	__u8 bpp;
	__u8 colorspace;
	__u32 fcc;
	__u32 flags;

	char name[32];

	unsigned int nframes;
	struct uvc_frame *frame;
};

struct uvc_streaming_header {
	__u8 bNumFormats;
	__u8 bEndpointAddress;
	__u8 bTerminalLink;
	__u8 bControlSize;
	__u8 *bmaControls;
	/* The following fields are used by input headers only. */