zc0301_struct.h

在LINUX下编译的摄像头驱动源码,有MAKE文件

/*	This file contains the basic struct:zc0301_device.
 *
 *	This struct is a virtual struct for ZC0301 device driver
 *
 *	It's created by WE.XCC at 2008.05.03
 *
 *	Author's E-mail:[e-mail]
 *
 */ 

#ifndef _ZC0301_STRUCT_H_
#define _ZC0301_STRUCT_H_

#include <linux/usb.h>            /*for usb*/
#include <linux/videodev.h>       /*for v4l2*/
#include <linux/types.h>         
#include <media/v4l2-common.h>    /*for v4l2*/
#include <linux/wait.h>           /*wait_queue_head_t need*/  
#include <linux/list.h>           /*struct list*/
#include <linux/vmalloc.h>        /*virtual memory area need*/
#include <linux/mm.h>
#include <linux/spinlock.h>       /*spin_lock need*/
#include <linux/mutex.h>          /*struct mutex*/

#define ZC0301_URBS        2
#define ZC0301_PACKETS     7
#define ZC0301_MAX_FRAMES  64

enum stream_state {
	STREAM_ON  = 0x01,
	STREAM_OFF = 0x02,
};

enum frame_state {
	F_UNUSED   = 0x01,
	F_QUEUED   = 0x02,	
	F_GRABBING = 0x04,
	F_DONE     = 0x08,
	F_ERROR    = 0x10,
};

enum device_state {
	INITED       = 0x01,
	MISCONFIGED  = 0x02,
	DISCONNECTED = 0x04,
};

struct zc0301_frame {
	void *bufmem;
	struct v4l2_buffer buf;
	struct list_head queue;
	enum frame_state f_state;
};

struct zc0301_device {
	struct usb_device *usbdev; /*for usb device*/   
	struct video_device *v4ldev; /*video register etc*/
	struct urb *urb[ZC0301_URBS]; /*urb transfer*/
	void *transfer_buffer[ZC0301_URBS]; /*store data when urb come back*/
	u8 *control_buffer, users; /*read back data && record how many processes*/

	enum device_state d_state; /*device state*/
	enum stream_state s_state; /*stream state*/
	wait_queue_head_t wait_frame; /*wait queue*/
	spinlock_t queue_lock; /*to use when handle with list_head*/
	struct zc0301_frame frame[ZC0301_MAX_FRAMES]; /*store data and v4l2 informations*/
	struct list_head inqueue, outqueue; /*in/out data*/
	struct mutex dev_mutex, fop_mutex; /*mutex lock for device and file operations*/

	u32 nbuffers; /*record how many vma/frame are alloced*/
	//u8 descriptors[5]; /*flag of descriptors*/
	//u8 config_count, intf_count, endp_count; /*to count number of descriptor*/
};

#endif