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linux-next/drivers/media/video/uvc/uvcvideo.h
Laurent Pinchart 50144aeeb7 V4L/DVB (10652): uvcvideo: Add quirk to override wrong bandwidth value for Vimicro devices 
At least 3 Vimicro cameras (0x332d, 0x3410 and 0x3420) fail to return correct
bandwidth information. The first model rounds the value provided by the host
to the nearest supported packet size, while the other two always request the
maximum bandwidth.

Introduce a device quirk to override the value returned by the device with an
estimated bandwidth computed by the driver from the frame size and frame rate,
and enable it for all Vimicro cameras.

Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-03-30 12:42:51 -03:00

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#ifndef _USB_VIDEO_H_
#define _USB_VIDEO_H_
#include <linux/kernel.h>
#include <linux/videodev2.h>
/*
* 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)
/* Control should be saved at suspend and restored at resume. */
#define UVC_CONTROL_RESTORE (1 << 6)
/* Control can be updated by the camera. */
#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_xu_control_info {
__u8 entity[16];
__u8 index;
__u8 selector;
__u16 size;
__u32 flags;
};
struct uvc_xu_control_mapping {
__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_xu_control {
__u8 unit;
__u8 selector;
__u16 size;
__u8 __user *data;
};
#define UVCIOC_CTRL_ADD _IOW('U', 1, struct uvc_xu_control_info)
#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)
#ifdef __KERNEL__
#include <linux/poll.h>
/* --------------------------------------------------------------------------
* UVC constants
*/
#define SC_UNDEFINED 0x00
#define SC_VIDEOCONTROL 0x01
#define SC_VIDEOSTREAMING 0x02
#define SC_VIDEO_INTERFACE_COLLECTION 0x03
#define PC_PROTOCOL_UNDEFINED 0x00
#define CS_UNDEFINED 0x20
#define CS_DEVICE 0x21
#define CS_CONFIGURATION 0x22
#define CS_STRING 0x23
#define CS_INTERFACE 0x24
#define CS_ENDPOINT 0x25
/* VideoControl class specific interface descriptor */
#define VC_DESCRIPTOR_UNDEFINED 0x00
#define VC_HEADER 0x01
#define VC_INPUT_TERMINAL 0x02
#define VC_OUTPUT_TERMINAL 0x03
#define VC_SELECTOR_UNIT 0x04
#define VC_PROCESSING_UNIT 0x05
#define VC_EXTENSION_UNIT 0x06
/* VideoStreaming class specific interface descriptor */
#define VS_UNDEFINED 0x00
#define VS_INPUT_HEADER 0x01
#define VS_OUTPUT_HEADER 0x02
#define VS_STILL_IMAGE_FRAME 0x03
#define VS_FORMAT_UNCOMPRESSED 0x04
#define VS_FRAME_UNCOMPRESSED 0x05
#define VS_FORMAT_MJPEG 0x06
#define VS_FRAME_MJPEG 0x07
#define VS_FORMAT_MPEG2TS 0x0a
#define VS_FORMAT_DV 0x0c
#define VS_COLORFORMAT 0x0d
#define VS_FORMAT_FRAME_BASED 0x10
#define VS_FRAME_FRAME_BASED 0x11
#define VS_FORMAT_STREAM_BASED 0x12
/* Endpoint type */
#define EP_UNDEFINED 0x00
#define EP_GENERAL 0x01
#define EP_ENDPOINT 0x02
#define EP_INTERRUPT 0x03
/* Request codes */
#define RC_UNDEFINED 0x00
#define SET_CUR 0x01
#define GET_CUR 0x81
#define GET_MIN 0x82
#define GET_MAX 0x83
#define GET_RES 0x84
#define GET_LEN 0x85
#define GET_INFO 0x86
#define GET_DEF 0x87
/* VideoControl interface controls */
#define VC_CONTROL_UNDEFINED 0x00
#define VC_VIDEO_POWER_MODE_CONTROL 0x01
#define VC_REQUEST_ERROR_CODE_CONTROL 0x02
/* Terminal controls */
#define TE_CONTROL_UNDEFINED 0x00
/* Selector Unit controls */
#define SU_CONTROL_UNDEFINED 0x00
#define SU_INPUT_SELECT_CONTROL 0x01
/* Camera Terminal controls */
#define CT_CONTROL_UNDEFINED 0x00
#define CT_SCANNING_MODE_CONTROL 0x01
#define CT_AE_MODE_CONTROL 0x02
#define CT_AE_PRIORITY_CONTROL 0x03
#define CT_EXPOSURE_TIME_ABSOLUTE_CONTROL 0x04
#define CT_EXPOSURE_TIME_RELATIVE_CONTROL 0x05
#define CT_FOCUS_ABSOLUTE_CONTROL 0x06
#define CT_FOCUS_RELATIVE_CONTROL 0x07
#define CT_FOCUS_AUTO_CONTROL 0x08
#define CT_IRIS_ABSOLUTE_CONTROL 0x09
#define CT_IRIS_RELATIVE_CONTROL 0x0a
#define CT_ZOOM_ABSOLUTE_CONTROL 0x0b
#define CT_ZOOM_RELATIVE_CONTROL 0x0c
#define CT_PANTILT_ABSOLUTE_CONTROL 0x0d
#define CT_PANTILT_RELATIVE_CONTROL 0x0e
#define CT_ROLL_ABSOLUTE_CONTROL 0x0f
#define CT_ROLL_RELATIVE_CONTROL 0x10
#define CT_PRIVACY_CONTROL 0x11
/* Processing Unit controls */
#define PU_CONTROL_UNDEFINED 0x00
#define PU_BACKLIGHT_COMPENSATION_CONTROL 0x01
#define PU_BRIGHTNESS_CONTROL 0x02
#define PU_CONTRAST_CONTROL 0x03
#define PU_GAIN_CONTROL 0x04
#define PU_POWER_LINE_FREQUENCY_CONTROL 0x05
#define PU_HUE_CONTROL 0x06
#define PU_SATURATION_CONTROL 0x07
#define PU_SHARPNESS_CONTROL 0x08
#define PU_GAMMA_CONTROL 0x09
#define PU_WHITE_BALANCE_TEMPERATURE_CONTROL 0x0a
#define PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL 0x0b
#define PU_WHITE_BALANCE_COMPONENT_CONTROL 0x0c
#define PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL 0x0d
#define PU_DIGITAL_MULTIPLIER_CONTROL 0x0e
#define PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL 0x0f
#define PU_HUE_AUTO_CONTROL 0x10
#define PU_ANALOG_VIDEO_STANDARD_CONTROL 0x11
#define PU_ANALOG_LOCK_STATUS_CONTROL 0x12
#define LXU_MOTOR_PANTILT_RELATIVE_CONTROL 0x01
#define LXU_MOTOR_PANTILT_RESET_CONTROL 0x02
#define LXU_MOTOR_FOCUS_MOTOR_CONTROL 0x03
/* VideoStreaming interface controls */
#define VS_CONTROL_UNDEFINED 0x00
#define VS_PROBE_CONTROL 0x01
#define VS_COMMIT_CONTROL 0x02
#define VS_STILL_PROBE_CONTROL 0x03
#define VS_STILL_COMMIT_CONTROL 0x04
#define VS_STILL_IMAGE_TRIGGER_CONTROL 0x05
#define VS_STREAM_ERROR_CODE_CONTROL 0x06
#define VS_GENERATE_KEY_FRAME_CONTROL 0x07
#define VS_UPDATE_FRAME_SEGMENT_CONTROL 0x08
#define VS_SYNC_DELAY_CONTROL 0x09
#define TT_VENDOR_SPECIFIC 0x0100
#define TT_STREAMING 0x0101
/* Input Terminal types */
#define ITT_VENDOR_SPECIFIC 0x0200
#define ITT_CAMERA 0x0201
#define ITT_MEDIA_TRANSPORT_INPUT 0x0202
/* Output Terminal types */
#define OTT_VENDOR_SPECIFIC 0x0300
#define OTT_DISPLAY 0x0301
#define OTT_MEDIA_TRANSPORT_OUTPUT 0x0302
/* External Terminal types */
#define EXTERNAL_VENDOR_SPECIFIC 0x0400
#define COMPOSITE_CONNECTOR 0x0401
#define SVIDEO_CONNECTOR 0x0402
#define COMPONENT_CONNECTOR 0x0403
#define UVC_TERM_INPUT 0x0000
#define UVC_TERM_OUTPUT 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) \
(((entity)->type & 0x8000) == UVC_TERM_INPUT)
#define UVC_ENTITY_IS_OTERM(entity) \
(((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
#define UVC_STATUS_TYPE_CONTROL 1
#define UVC_STATUS_TYPE_STREAMING 2
/* ------------------------------------------------------------------------
* 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_LOGITECH_DEV_INFO \
{0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x1e}
#define UVC_GUID_LOGITECH_USER_HW \
{0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x1f}
#define UVC_GUID_LOGITECH_VIDEO \
{0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x50}
#define UVC_GUID_LOGITECH_MOTOR \
{0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x56}
#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_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_BY8 \
{ 'B', 'Y', '8', ' ', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
/* ------------------------------------------------------------------------
* Driver specific constants.
*/
#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 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 1000
/* 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_PRUNE_CONTROLS 0x00000040
#define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
/* 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_streaming_control {
__u16 bmHint;
__u8 bFormatIndex;
__u8 bFrameIndex;
__u32 dwFrameInterval;
__u16 wKeyFrameRate;
__u16 wPFrameRate;
__u16 wCompQuality;
__u16 wCompWindowSize;
__u16 wDelay;
__u32 dwMaxVideoFrameSize;
__u32 dwMaxPayloadTransferSize;
__u32 dwClockFrequency;
__u8 bmFramingInfo;
__u8 bPreferedVersion;
__u8 bMinVersion;
__u8 bMaxVersion;
};
struct uvc_menu_info {
__u32 value;
__u8 name[32];
};
struct uvc_control_info {
struct list_head list;
struct list_head mappings;
__u8 entity[16];
__u8 index;
__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;
__u8 *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 {
__u8 bSourceID;
} output;
struct {
__u8 bSourceID;
__u16 wMaxMultiplier;
__u8 bControlSize;
__u8 *bmControls;
__u8 bmVideoStandards;
} processing;
struct {
__u8 bNrInPins;
__u8 *baSourceID;
} selector;
struct {
__u8 guidExtensionCode[16];
__u8 bNumControls;
__u8 bNrInPins;
__u8 *baSourceID;
__u8 bControlSize;
__u8 *bmControls;
__u8 *bmControlsType;
} extension;
};
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. */
__u8 bmInfo;
__u8 bStillCaptureMethod;
__u8 bTriggerSupport;
__u8 bTriggerUsage;
};
struct uvc_streaming {
struct list_head list;
struct usb_interface *intf;
int intfnum;
__u16 maxpsize;
struct uvc_streaming_header header;
enum v4l2_buf_type type;
unsigned int nformats;
struct uvc_format *format;
struct uvc_streaming_control ctrl;
struct uvc_format *cur_format;
struct uvc_frame *cur_frame;
struct mutex mutex;
};
enum uvc_buffer_state {
UVC_BUF_STATE_IDLE = 0,
UVC_BUF_STATE_QUEUED = 1,
UVC_BUF_STATE_ACTIVE = 2,
UVC_BUF_STATE_DONE = 3,
UVC_BUF_STATE_ERROR = 4,
};
struct uvc_buffer {
unsigned long vma_use_count;
struct list_head stream;
/* Touched by interrupt handler. */
struct v4l2_buffer buf;
struct list_head queue;
wait_queue_head_t wait;
enum uvc_buffer_state state;
};
#define UVC_QUEUE_STREAMING (1 << 0)
#define UVC_QUEUE_DISCONNECTED (1 << 1)
#define UVC_QUEUE_DROP_INCOMPLETE (1 << 2)
struct uvc_video_queue {
enum v4l2_buf_type type;
void *mem;
unsigned int flags;
__u32 sequence;
unsigned int count;
unsigned int buf_size;
unsigned int buf_used;
struct uvc_buffer buffer[UVC_MAX_VIDEO_BUFFERS];
struct mutex mutex; /* protects buffers and mainqueue */
spinlock_t irqlock; /* protects irqqueue */
struct list_head mainqueue;
struct list_head irqqueue;
};
struct uvc_video_device {
struct uvc_device *dev;
struct video_device *vdev;
atomic_t active;
unsigned int frozen : 1;
struct list_head iterms; /* Input terminals */
struct uvc_entity *oterm; /* Output terminal */
struct uvc_entity *sterm; /* USB streaming terminal */
struct uvc_entity *processing;
struct uvc_entity *selector;
struct list_head extensions;
struct mutex ctrl_mutex;
struct uvc_video_queue queue;
/* Video streaming object, must always be non-NULL. */
struct uvc_streaming *streaming;
void (*decode) (struct urb *urb, struct uvc_video_device *video,
struct uvc_buffer *buf);
/* Context data used by the bulk completion handler. */
struct {
__u8 header[256];
unsigned int header_size;
int skip_payload;
__u32 payload_size;
__u32 max_payload_size;
} bulk;
struct urb *urb[UVC_URBS];
char *urb_buffer[UVC_URBS];
dma_addr_t urb_dma[UVC_URBS];
unsigned int urb_size;
__u8 last_fid;
};
enum uvc_device_state {
UVC_DEV_DISCONNECTED = 1,
};
struct uvc_device {
struct usb_device *udev;
struct usb_interface *intf;
unsigned long warnings;
__u32 quirks;
int intfnum;
char name[32];
enum uvc_device_state state;
struct kref kref;
struct list_head list;
/* Video control interface */
__u16 uvc_version;
__u32 clock_frequency;
struct list_head entities;
struct uvc_video_device video;
/* Status Interrupt Endpoint */
struct usb_host_endpoint *int_ep;
struct urb *int_urb;
__u8 *status;
struct input_dev *input;
char input_phys[64];
/* Video Streaming interfaces */
struct list_head streaming;
};
enum uvc_handle_state {
UVC_HANDLE_PASSIVE = 0,
UVC_HANDLE_ACTIVE = 1,
};
struct uvc_fh {
struct uvc_video_device *device;
enum uvc_handle_state state;
};
struct uvc_driver {
struct usb_driver driver;
struct mutex open_mutex; /* protects from open/disconnect race */
struct list_head devices; /* struct uvc_device list */
struct list_head controls; /* struct uvc_control_info list */
struct mutex ctrl_mutex; /* protects controls and devices
lists */
};
/* ------------------------------------------------------------------------
* Debugging, printing and logging
*/
#define UVC_TRACE_PROBE (1 << 0)
#define UVC_TRACE_DESCR (1 << 1)
#define UVC_TRACE_CONTROL (1 << 2)
#define UVC_TRACE_FORMAT (1 << 3)
#define UVC_TRACE_CAPTURE (1 << 4)
#define UVC_TRACE_CALLS (1 << 5)
#define UVC_TRACE_IOCTL (1 << 6)
#define UVC_TRACE_FRAME (1 << 7)
#define UVC_TRACE_SUSPEND (1 << 8)
#define UVC_TRACE_STATUS (1 << 9)
#define UVC_WARN_MINMAX 0
#define UVC_WARN_PROBE_DEF 1
extern unsigned int uvc_no_drop_param;
extern unsigned int uvc_trace_param;
#define uvc_trace(flag, msg...) \
do { \
if (uvc_trace_param & flag) \
printk(KERN_DEBUG "uvcvideo: " msg); \
} while (0)
#define uvc_warn_once(dev, warn, msg...) \
do { \
if (!test_and_set_bit(warn, &dev->warnings)) \
printk(KERN_INFO "uvcvideo: " msg); \
} while (0)
#define uvc_printk(level, msg...) \
printk(level "uvcvideo: " msg)
#define UVC_GUID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \
"%02x%02x%02x%02x%02x%02x"
#define UVC_GUID_ARGS(guid) \
(guid)[3], (guid)[2], (guid)[1], (guid)[0], \
(guid)[5], (guid)[4], \
(guid)[7], (guid)[6], \
(guid)[8], (guid)[9], \
(guid)[10], (guid)[11], (guid)[12], \
(guid)[13], (guid)[14], (guid)[15]
/* --------------------------------------------------------------------------
* Internal functions.
*/
/* Core driver */
extern struct uvc_driver uvc_driver;
extern void uvc_delete(struct kref *kref);
/* Video buffers queue management. */
extern void uvc_queue_init(struct uvc_video_queue *queue,
enum v4l2_buf_type type);
extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
unsigned int nbuffers, unsigned int buflength);
extern int uvc_free_buffers(struct uvc_video_queue *queue);
extern int uvc_query_buffer(struct uvc_video_queue *queue,
struct v4l2_buffer *v4l2_buf);
extern int uvc_queue_buffer(struct uvc_video_queue *queue,
struct v4l2_buffer *v4l2_buf);
extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
struct v4l2_buffer *v4l2_buf, int nonblocking);
extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
struct uvc_buffer *buf);
extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
struct file *file, poll_table *wait);
static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
{
return queue->flags & UVC_QUEUE_STREAMING;
}
/* V4L2 interface */
extern const struct v4l2_file_operations uvc_fops;
/* Video */
extern int uvc_video_init(struct uvc_video_device *video);
extern int uvc_video_suspend(struct uvc_video_device *video);
extern int uvc_video_resume(struct uvc_video_device *video);
extern int uvc_video_enable(struct uvc_video_device *video, int enable);
extern int uvc_probe_video(struct uvc_video_device *video,
struct uvc_streaming_control *probe);
extern int uvc_commit_video(struct uvc_video_device *video,
struct uvc_streaming_control *ctrl);
extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
__u8 intfnum, __u8 cs, void *data, __u16 size);
/* Status */
extern int uvc_status_init(struct uvc_device *dev);
extern void uvc_status_cleanup(struct uvc_device *dev);
extern int uvc_status_suspend(struct uvc_device *dev);
extern int uvc_status_resume(struct uvc_device *dev);
/* Controls */
extern struct uvc_control *uvc_find_control(struct uvc_video_device *video,
__u32 v4l2_id, struct uvc_control_mapping **mapping);
extern int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
struct v4l2_queryctrl *v4l2_ctrl);
extern int uvc_ctrl_add_info(struct uvc_control_info *info);
extern int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping);
extern int uvc_ctrl_init_device(struct uvc_device *dev);
extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
extern int uvc_ctrl_resume_device(struct uvc_device *dev);
extern void uvc_ctrl_init(void);
extern int uvc_ctrl_begin(struct uvc_video_device *video);
extern int __uvc_ctrl_commit(struct uvc_video_device *video, int rollback);
static inline int uvc_ctrl_commit(struct uvc_video_device *video)
{
return __uvc_ctrl_commit(video, 0);
}
static inline int uvc_ctrl_rollback(struct uvc_video_device *video)
{
return __uvc_ctrl_commit(video, 1);
}
extern int uvc_ctrl_get(struct uvc_video_device *video,
struct v4l2_ext_control *xctrl);
extern int uvc_ctrl_set(struct uvc_video_device *video,
struct v4l2_ext_control *xctrl);
extern int uvc_xu_ctrl_query(struct uvc_video_device *video,
struct uvc_xu_control *ctrl, int set);
/* Utility functions */
extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
unsigned int n_terms, unsigned int threshold);
extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
uint32_t denominator);
extern struct usb_host_endpoint *uvc_find_endpoint(
struct usb_host_interface *alts, __u8 epaddr);
/* Quirks support */
void uvc_video_decode_isight(struct urb *urb, struct uvc_video_device *video,
struct uvc_buffer *buf);
#endif /* __KERNEL__ */
#endif
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