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linux/drivers/usb/gadget/uvc.h
Laurent Pinchart 5d9955f8a9 V4L/DVB: uvc: Fix multiple symbols definitions with UVC gadget and host drivers 
The UVC gadget driver borrowed code from the UVC host driver without
changing the symbol names. This results in a namespace clash with
multiple definitions of several symbols when compiling both drivers in
the kernel.

Make all generic UVC functions and variables static in the UVC gadget
driver, as the symbols are not referenced outside of the gadget driver.
Rename the uvc_trace_param global variable to uvc_gadget_trace_param.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-07-11 17:45:10 -03:00

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/*
* 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
/* ------------------------------------------------------------------------
* UVC constants & structures
*/
/* Values for bmHeaderInfo (Video and Still Image Payload Headers, 2.4.3.3) */
#define UVC_STREAM_EOH (1 << 7)
#define UVC_STREAM_ERR (1 << 6)
#define UVC_STREAM_STI (1 << 5)
#define UVC_STREAM_RES (1 << 4)
#define UVC_STREAM_SCR (1 << 3)
#define UVC_STREAM_PTS (1 << 2)
#define UVC_STREAM_EOF (1 << 1)
#define UVC_STREAM_FID (1 << 0)
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;
} __attribute__((__packed__));
/* ------------------------------------------------------------------------
* 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
#define USB_DT_INTERFACE_ASSOCIATION_SIZE 8
#define USB_CLASS_MISC 0xef
/* ------------------------------------------------------------------------
* 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_ */
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