200 lines
4.6 KiB
C
200 lines
4.6 KiB
C
/*
|
|
* uvc_gadget.h -- USB Video Class Gadget driver
|
|
*
|
|
* Copyright (C) 2009-2010
|
|
* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
*/
|
|
|
|
#ifndef _UVC_GADGET_H_
|
|
#define _UVC_GADGET_H_
|
|
|
|
#include <linux/ioctl.h>
|
|
#include <linux/types.h>
|
|
#include <linux/usb/ch9.h>
|
|
|
|
#define UVC_EVENT_FIRST (V4L2_EVENT_PRIVATE_START + 0)
|
|
#define UVC_EVENT_CONNECT (V4L2_EVENT_PRIVATE_START + 0)
|
|
#define UVC_EVENT_DISCONNECT (V4L2_EVENT_PRIVATE_START + 1)
|
|
#define UVC_EVENT_STREAMON (V4L2_EVENT_PRIVATE_START + 2)
|
|
#define UVC_EVENT_STREAMOFF (V4L2_EVENT_PRIVATE_START + 3)
|
|
#define UVC_EVENT_SETUP (V4L2_EVENT_PRIVATE_START + 4)
|
|
#define UVC_EVENT_DATA (V4L2_EVENT_PRIVATE_START + 5)
|
|
#define UVC_EVENT_LAST (V4L2_EVENT_PRIVATE_START + 5)
|
|
|
|
struct uvc_request_data
|
|
{
|
|
unsigned int length;
|
|
__u8 data[60];
|
|
};
|
|
|
|
struct uvc_event
|
|
{
|
|
union {
|
|
enum usb_device_speed speed;
|
|
struct usb_ctrlrequest req;
|
|
struct uvc_request_data data;
|
|
};
|
|
};
|
|
|
|
#define UVCIOC_SEND_RESPONSE _IOW('U', 1, struct uvc_request_data)
|
|
|
|
#define UVC_INTF_CONTROL 0
|
|
#define UVC_INTF_STREAMING 1
|
|
|
|
/* ------------------------------------------------------------------------
|
|
* Debugging, printing and logging
|
|
*/
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/usb.h> /* For usb_endpoint_* */
|
|
#include <linux/usb/gadget.h>
|
|
#include <linux/videodev2.h>
|
|
#include <media/v4l2-fh.h>
|
|
|
|
#include "uvc_queue.h"
|
|
|
|
#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_gadget_trace_param;
|
|
|
|
#define uvc_trace(flag, msg...) \
|
|
do { \
|
|
if (uvc_gadget_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)
|
|
|
|
/* ------------------------------------------------------------------------
|
|
* Driver specific constants
|
|
*/
|
|
|
|
#define DRIVER_VERSION "0.1.0"
|
|
#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 0)
|
|
|
|
#define DMA_ADDR_INVALID (~(dma_addr_t)0)
|
|
|
|
#define UVC_NUM_REQUESTS 4
|
|
#define UVC_MAX_REQUEST_SIZE 64
|
|
#define UVC_MAX_EVENTS 4
|
|
|
|
/* ------------------------------------------------------------------------
|
|
* Structures
|
|
*/
|
|
|
|
struct uvc_video
|
|
{
|
|
struct usb_ep *ep;
|
|
|
|
/* Frame parameters */
|
|
u8 bpp;
|
|
u32 fcc;
|
|
unsigned int width;
|
|
unsigned int height;
|
|
unsigned int imagesize;
|
|
|
|
/* Requests */
|
|
unsigned int req_size;
|
|
struct usb_request *req[UVC_NUM_REQUESTS];
|
|
__u8 *req_buffer[UVC_NUM_REQUESTS];
|
|
struct list_head req_free;
|
|
spinlock_t req_lock;
|
|
|
|
void (*encode) (struct usb_request *req, struct uvc_video *video,
|
|
struct uvc_buffer *buf);
|
|
|
|
/* Context data used by the completion handler */
|
|
__u32 payload_size;
|
|
__u32 max_payload_size;
|
|
|
|
struct uvc_video_queue queue;
|
|
unsigned int fid;
|
|
};
|
|
|
|
enum uvc_state
|
|
{
|
|
UVC_STATE_DISCONNECTED,
|
|
UVC_STATE_CONNECTED,
|
|
UVC_STATE_STREAMING,
|
|
};
|
|
|
|
struct uvc_device
|
|
{
|
|
struct video_device *vdev;
|
|
enum uvc_state state;
|
|
struct usb_function func;
|
|
struct uvc_video video;
|
|
|
|
/* Descriptors */
|
|
struct {
|
|
const struct uvc_descriptor_header * const *control;
|
|
const struct uvc_descriptor_header * const *fs_streaming;
|
|
const struct uvc_descriptor_header * const *hs_streaming;
|
|
} desc;
|
|
|
|
unsigned int control_intf;
|
|
struct usb_ep *control_ep;
|
|
struct usb_request *control_req;
|
|
void *control_buf;
|
|
|
|
unsigned int streaming_intf;
|
|
|
|
/* Events */
|
|
unsigned int event_length;
|
|
unsigned int event_setup_out : 1;
|
|
};
|
|
|
|
static inline struct uvc_device *to_uvc(struct usb_function *f)
|
|
{
|
|
return container_of(f, struct uvc_device, func);
|
|
}
|
|
|
|
struct uvc_file_handle
|
|
{
|
|
struct v4l2_fh vfh;
|
|
struct uvc_video *device;
|
|
};
|
|
|
|
#define to_uvc_file_handle(handle) \
|
|
container_of(handle, struct uvc_file_handle, vfh)
|
|
|
|
/* ------------------------------------------------------------------------
|
|
* Functions
|
|
*/
|
|
|
|
extern void uvc_endpoint_stream(struct uvc_device *dev);
|
|
|
|
extern void uvc_function_connect(struct uvc_device *uvc);
|
|
extern void uvc_function_disconnect(struct uvc_device *uvc);
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _UVC_GADGET_H_ */
|
|
|