#ifndef _USB_VIDEO_H_ #define _USB_VIDEO_H_ #include #include /* * 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 #include /* -------------------------------------------------------------------------- * UVC constants */ #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) \ (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_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_FIX_BANDWIDTH 0x00000080 #define UVC_QUIRK_PROBE_DEF 0x00000100 /* 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; }; 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_chain { struct uvc_device *dev; struct list_head list; struct list_head iterms; /* Input terminals */ struct list_head oterms; /* Output terminals */ struct uvc_entity *processing; /* Processing unit */ struct uvc_entity *selector; /* Selector unit */ struct list_head extensions; /* Extension units */ struct mutex ctrl_mutex; }; 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 *cur_format; struct uvc_frame *cur_frame; struct mutex mutex; unsigned int frozen : 1; struct uvc_video_queue queue; void (*decode) (struct urb *urb, struct uvc_streaming *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; atomic_t users; /* Video control interface */ __u16 uvc_version; __u32 clock_frequency; struct list_head entities; struct list_head chains; /* Video Streaming interfaces */ struct list_head streams; /* Status Interrupt Endpoint */ struct usb_host_endpoint *int_ep; struct urb *int_urb; __u8 *status; struct input_dev *input; char input_phys[64]; }; enum uvc_handle_state { UVC_HANDLE_PASSIVE = 0, UVC_HANDLE_ACTIVE = 1, }; struct uvc_fh { struct uvc_video_chain *chain; struct uvc_streaming *stream; 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_TRACE_VIDEO (1 << 10) #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); extern int uvc_queue_allocated(struct uvc_video_queue *queue); 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_streaming *stream); extern int uvc_video_suspend(struct uvc_streaming *stream); extern int uvc_video_resume(struct uvc_streaming *stream); extern int uvc_video_enable(struct uvc_streaming *stream, int enable); extern int uvc_probe_video(struct uvc_streaming *stream, struct uvc_streaming_control *probe); extern int uvc_commit_video(struct uvc_streaming *stream, 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_start(struct uvc_device *dev); extern void uvc_status_stop(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_chain *chain, __u32 v4l2_id, struct uvc_control_mapping **mapping); extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, 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_chain *chain); extern int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback); static inline int uvc_ctrl_commit(struct uvc_video_chain *chain) { return __uvc_ctrl_commit(chain, 0); } static inline int uvc_ctrl_rollback(struct uvc_video_chain *chain) { return __uvc_ctrl_commit(chain, 1); } extern int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl); extern int uvc_ctrl_set(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl); extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain, 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_streaming *stream, struct uvc_buffer *buf); #endif /* __KERNEL__ */ #endif