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linux_dsm_epyc7002/drivers/media/usb/uvc/uvcvideo.h
Guennadi Liakhovetski e5225c820c media: uvcvideo: Send a control event when a Control Change interrupt arrives 
UVC defines a method of handling asynchronous controls, which sends a
USB packet over the interrupt pipe. This patch implements support for
such packets by sending a control event to the user. Since this can
involve USB traffic and, therefore, scheduling, this has to be done
in a work queue.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@intel.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-07-27 06:39:57 -04:00

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _USB_VIDEO_H_
#define _USB_VIDEO_H_
#ifndef __KERNEL__
#error "The uvcvideo.h header is deprecated, use linux/uvcvideo.h instead."
#endif /* __KERNEL__ */
#include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/usb.h>
#include <linux/usb/video.h>
#include <linux/uvcvideo.h>
#include <linux/videodev2.h>
#include <linux/workqueue.h>
#include <media/media-device.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fh.h>
#include <media/videobuf2-v4l2.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_Y8 \
{ 'Y', '8', ' ', ' ', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y10 \
{ 'Y', '1', '0', ' ', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y12 \
{ 'Y', '1', '2', ' ', 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_BA81 \
{ 'B', 'A', '8', '1', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_GBRG \
{ 'G', 'B', 'R', 'G', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_GRBG \
{ 'G', 'R', 'B', 'G', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_RGGB \
{ 'R', 'G', 'G', 'B', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_BG16 \
{ 'B', 'G', '1', '6', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_GB16 \
{ 'G', 'B', '1', '6', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_RG16 \
{ 'R', 'G', '1', '6', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_GR16 \
{ 'G', 'R', '1', '6', 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}
#define UVC_GUID_FORMAT_BGR3 \
{ 0x7d, 0xeb, 0x36, 0xe4, 0x4f, 0x52, 0xce, 0x11, \
0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}
#define UVC_GUID_FORMAT_M420 \
{ 'M', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_H264 \
{ 'H', '2', '6', '4', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y8I \
{ 'Y', '8', 'I', ' ', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y12I \
{ 'Y', '1', '2', 'I', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Z16 \
{ 'Z', '1', '6', ' ', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_RW10 \
{ 'R', 'W', '1', '0', 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_INVZ \
{ 'I', 'N', 'V', 'Z', 0x90, 0x2d, 0x58, 0x4a, \
0x92, 0x0b, 0x77, 0x3f, 0x1f, 0x2c, 0x55, 0x6b}
#define UVC_GUID_FORMAT_INZI \
{ 'I', 'N', 'Z', 'I', 0x66, 0x1a, 0x42, 0xa2, \
0x90, 0x65, 0xd0, 0x18, 0x14, 0xa8, 0xef, 0x8a}
#define UVC_GUID_FORMAT_INVI \
{ 'I', 'N', 'V', 'I', 0xdb, 0x57, 0x49, 0x5e, \
0x8e, 0x3f, 0xf4, 0x79, 0x53, 0x2b, 0x94, 0x6f}
#define UVC_GUID_FORMAT_D3DFMT_L8 \
{0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_KSMEDIA_L8_IR \
{0x32, 0x00, 0x00, 0x00, 0x02, 0x00, 0x10, 0x00, \
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
/* ------------------------------------------------------------------------
* Driver specific constants.
*/
#define DRIVER_VERSION "1.1.1"
/* Number of isochronous URBs. */
#define UVC_URBS 5
/* Maximum number of packets per URB. */
#define UVC_MAX_PACKETS 32
/* Maximum status buffer size in bytes of interrupt URB. */
#define UVC_MAX_STATUS_SIZE 16
#define UVC_CTRL_CONTROL_TIMEOUT 500
#define UVC_CTRL_STREAMING_TIMEOUT 5000
/* Maximum allowed number of control mappings per device */
#define UVC_MAX_CONTROL_MAPPINGS 1024
#define UVC_MAX_CONTROL_MENU_ENTRIES 32
/* 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
#define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400
#define UVC_QUIRK_FORCE_Y8 0x00000800
/* 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 list_head ev_subs;
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;
u32 master_id;
s32 master_manual;
u32 slave_ids[2];
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_fh *handle; /* File handle that last changed the control. */
};
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.
*/
#define UVC_ENTITY_FLAG_DEFAULT (1 << 0)
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. */
unsigned int flags;
u8 id;
u16 type;
char name[64];
/* Media controller-related fields. */
struct video_device *vdev;
struct v4l2_subdev subdev;
unsigned int num_pads;
unsigned int num_links;
struct media_pad *pads;
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. */
u8 bmInfo;
u8 bStillCaptureMethod;
u8 bTriggerSupport;
u8 bTriggerUsage;
};
enum uvc_buffer_state {
UVC_BUF_STATE_IDLE = 0,
UVC_BUF_STATE_QUEUED = 1,
UVC_BUF_STATE_ACTIVE = 2,
UVC_BUF_STATE_READY = 3,
UVC_BUF_STATE_DONE = 4,
UVC_BUF_STATE_ERROR = 5,
};
struct uvc_buffer {
struct vb2_v4l2_buffer buf;
struct list_head queue;
enum uvc_buffer_state state;
unsigned int error;
void *mem;
unsigned int length;
unsigned int bytesused;
u32 pts;
};
#define UVC_QUEUE_DISCONNECTED (1 << 0)
#define UVC_QUEUE_DROP_CORRUPTED (1 << 1)
struct uvc_video_queue {
struct vb2_queue queue;
struct mutex mutex; /* Protects queue */
unsigned int flags;
unsigned int buf_used;
spinlock_t irqlock; /* Protects irqqueue */
struct list_head irqqueue;
};
struct uvc_video_chain {
struct uvc_device *dev;
struct list_head list;
struct list_head entities; /* All entities */
struct uvc_entity *processing; /* Processing unit */
struct uvc_entity *selector; /* Selector unit */
struct mutex ctrl_mutex; /* Protects ctrl.info */
struct v4l2_prio_state prio; /* V4L2 priority state */
u32 caps; /* V4L2 chain-wide caps */
};
struct uvc_stats_frame {
unsigned int size; /* Number of bytes captured */
unsigned int first_data; /* Index of the first non-empty packet */
unsigned int nb_packets; /* Number of packets */
unsigned int nb_empty; /* Number of empty packets */
unsigned int nb_invalid; /* Number of packets with an invalid header */
unsigned int nb_errors; /* Number of packets with the error bit set */
unsigned int nb_pts; /* Number of packets with a PTS timestamp */
unsigned int nb_pts_diffs; /* Number of PTS differences inside a frame */
unsigned int last_pts_diff; /* Index of the last PTS difference */
bool has_initial_pts; /* Whether the first non-empty packet has a PTS */
bool has_early_pts; /* Whether a PTS is present before the first non-empty packet */
u32 pts; /* PTS of the last packet */
unsigned int nb_scr; /* Number of packets with a SCR timestamp */
unsigned int nb_scr_diffs; /* Number of SCR.STC differences inside a frame */
u16 scr_sof; /* SCR.SOF of the last packet */
u32 scr_stc; /* SCR.STC of the last packet */
};
struct uvc_stats_stream {
ktime_t start_ts; /* Stream start timestamp */
ktime_t stop_ts; /* Stream stop timestamp */
unsigned int nb_frames; /* Number of frames */
unsigned int nb_packets; /* Number of packets */
unsigned int nb_empty; /* Number of empty packets */
unsigned int nb_invalid; /* Number of packets with an invalid header */
unsigned int nb_errors; /* Number of packets with the error bit set */
unsigned int nb_pts_constant; /* Number of frames with constant PTS */
unsigned int nb_pts_early; /* Number of frames with early PTS */
unsigned int nb_pts_initial; /* Number of frames with initial PTS */
unsigned int nb_scr_count_ok; /* Number of frames with at least one SCR per non empty packet */
unsigned int nb_scr_diffs_ok; /* Number of frames with varying SCR.STC */
unsigned int scr_sof_count; /* STC.SOF counter accumulated since stream start */
unsigned int scr_sof; /* STC.SOF of the last packet */
unsigned int min_sof; /* Minimum STC.SOF value */
unsigned int max_sof; /* Maximum STC.SOF value */
};
#define UVC_METATADA_BUF_SIZE 1024
struct uvc_streaming {
struct list_head list;
struct uvc_device *dev;
struct video_device vdev;
struct uvc_video_chain *chain;
atomic_t active;
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 *def_format;
struct uvc_format *cur_format;
struct uvc_frame *cur_frame;
/* Protect access to ctrl, cur_format, cur_frame and hardware video
* probe control.
*/
struct mutex mutex;
/* Buffers queue. */
unsigned int frozen : 1;
struct uvc_video_queue queue;
void (*decode) (struct urb *urb, struct uvc_streaming *video,
struct uvc_buffer *buf, struct uvc_buffer *meta_buf);
struct {
struct video_device vdev;
struct uvc_video_queue queue;
u32 format;
} meta;
/* 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;
u32 sequence;
u8 last_fid;
/* debugfs */
struct dentry *debugfs_dir;
struct {
struct uvc_stats_frame frame;
struct uvc_stats_stream stream;
} stats;
/* Timestamps support. */
struct uvc_clock {
struct uvc_clock_sample {
u32 dev_stc;
u16 dev_sof;
u16 host_sof;
ktime_t host_time;
} *samples;
unsigned int head;
unsigned int count;
unsigned int size;
u16 last_sof;
u16 sof_offset;
u8 last_scr[6];
spinlock_t lock;
} clock;
};
struct uvc_device {
struct usb_device *udev;
struct usb_interface *intf;
unsigned long warnings;
u32 quirks;
u32 meta_format;
int intfnum;
char name[32];
struct mutex lock; /* Protects users */
unsigned int users;
atomic_t nmappings;
/* Video control interface */
#ifdef CONFIG_MEDIA_CONTROLLER
struct media_device mdev;
#endif
struct v4l2_device vdev;
u16 uvc_version;
u32 clock_frequency;
struct list_head entities;
struct list_head chains;
/* Video Streaming interfaces */
struct list_head streams;
struct kref ref;
/* Status Interrupt Endpoint */
struct usb_host_endpoint *int_ep;
struct urb *int_urb;
u8 *status;
struct input_dev *input;
char input_phys[64];
struct uvc_ctrl_work {
struct work_struct work;
struct urb *urb;
struct uvc_video_chain *chain;
struct uvc_control *ctrl;
const void *data;
} async_ctrl;
};
enum uvc_handle_state {
UVC_HANDLE_PASSIVE = 0,
UVC_HANDLE_ACTIVE = 1,
};
struct uvc_fh {
struct v4l2_fh vfh;
struct uvc_video_chain *chain;
struct uvc_streaming *stream;
enum uvc_handle_state state;
};
struct uvc_driver {
struct usb_driver driver;
};
/* ------------------------------------------------------------------------
* 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_FRAME (1 << 7)
#define UVC_TRACE_SUSPEND (1 << 8)
#define UVC_TRACE_STATUS (1 << 9)
#define UVC_TRACE_VIDEO (1 << 10)
#define UVC_TRACE_STATS (1 << 11)
#define UVC_TRACE_CLOCK (1 << 12)
#define UVC_WARN_MINMAX 0
#define UVC_WARN_PROBE_DEF 1
#define UVC_WARN_XU_GET_RES 2
extern unsigned int uvc_clock_param;
extern unsigned int uvc_no_drop_param;
extern unsigned int uvc_trace_param;
extern unsigned int uvc_timeout_param;
extern unsigned int uvc_hw_timestamps_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)
/* --------------------------------------------------------------------------
* Internal functions.
*/
/* Core driver */
extern struct uvc_driver uvc_driver;
struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
/* Video buffers queue management. */
int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
int drop_corrupted);
void uvc_queue_release(struct uvc_video_queue *queue);
int uvc_request_buffers(struct uvc_video_queue *queue,
struct v4l2_requestbuffers *rb);
int uvc_query_buffer(struct uvc_video_queue *queue,
struct v4l2_buffer *v4l2_buf);
int uvc_create_buffers(struct uvc_video_queue *queue,
struct v4l2_create_buffers *v4l2_cb);
int uvc_queue_buffer(struct uvc_video_queue *queue,
struct v4l2_buffer *v4l2_buf);
int uvc_export_buffer(struct uvc_video_queue *queue,
struct v4l2_exportbuffer *exp);
int uvc_dequeue_buffer(struct uvc_video_queue *queue,
struct v4l2_buffer *v4l2_buf, int nonblocking);
int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type);
int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type type);
void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
struct uvc_buffer *buf);
int uvc_queue_mmap(struct uvc_video_queue *queue,
struct vm_area_struct *vma);
__poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
poll_table *wait);
#ifndef CONFIG_MMU
unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
unsigned long pgoff);
#endif
int uvc_queue_allocated(struct uvc_video_queue *queue);
static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
{
return vb2_is_streaming(&queue->queue);
}
/* V4L2 interface */
extern const struct v4l2_ioctl_ops uvc_ioctl_ops;
extern const struct v4l2_file_operations uvc_fops;
/* Media controller */
int uvc_mc_register_entities(struct uvc_video_chain *chain);
void uvc_mc_cleanup_entity(struct uvc_entity *entity);
/* Video */
int uvc_video_init(struct uvc_streaming *stream);
int uvc_video_suspend(struct uvc_streaming *stream);
int uvc_video_resume(struct uvc_streaming *stream, int reset);
int uvc_video_enable(struct uvc_streaming *stream, int enable);
int uvc_probe_video(struct uvc_streaming *stream,
struct uvc_streaming_control *probe);
int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
u8 intfnum, u8 cs, void *data, u16 size);
void uvc_video_clock_update(struct uvc_streaming *stream,
struct vb2_v4l2_buffer *vbuf,
struct uvc_buffer *buf);
int uvc_meta_register(struct uvc_streaming *stream);
int uvc_register_video_device(struct uvc_device *dev,
struct uvc_streaming *stream,
struct video_device *vdev,
struct uvc_video_queue *queue,
enum v4l2_buf_type type,
const struct v4l2_file_operations *fops,
const struct v4l2_ioctl_ops *ioctl_ops);
/* Status */
int uvc_status_init(struct uvc_device *dev);
void uvc_status_cleanup(struct uvc_device *dev);
int uvc_status_start(struct uvc_device *dev, gfp_t flags);
void uvc_status_stop(struct uvc_device *dev);
/* Controls */
extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
struct v4l2_queryctrl *v4l2_ctrl);
int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
struct v4l2_querymenu *query_menu);
int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
const struct uvc_control_mapping *mapping);
int uvc_ctrl_init_device(struct uvc_device *dev);
void uvc_ctrl_cleanup_device(struct uvc_device *dev);
int uvc_ctrl_restore_values(struct uvc_device *dev);
bool uvc_ctrl_status_event(struct urb *urb, struct uvc_video_chain *chain,
struct uvc_control *ctrl, const u8 *data);
int uvc_ctrl_begin(struct uvc_video_chain *chain);
int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
const struct v4l2_ext_control *xctrls,
unsigned int xctrls_count);
static inline int uvc_ctrl_commit(struct uvc_fh *handle,
const struct v4l2_ext_control *xctrls,
unsigned int xctrls_count)
{
return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count);
}
static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
{
return __uvc_ctrl_commit(handle, 1, NULL, 0);
}
int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);
int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);
int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
struct uvc_xu_control_query *xqry);
/* Utility functions */
void uvc_simplify_fraction(u32 *numerator, u32 *denominator,
unsigned int n_terms, unsigned int threshold);
u32 uvc_fraction_to_interval(u32 numerator, u32 denominator);
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_streaming *stream,
struct uvc_buffer *buf,
struct uvc_buffer *meta_buf);
/* debugfs and statistics */
void uvc_debugfs_init(void);
void uvc_debugfs_cleanup(void);
void uvc_debugfs_init_stream(struct uvc_streaming *stream);
void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,
size_t size);
#endif
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