vivi_usb_drv.h

可以写s3c2410 USB device的PC端USB驱动和程序

/*
 * Driver for USB of VIVI (linux-2.4.20-8)
 *
 * Copyright (C) 2006, [e-mail]
 *
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */ 

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <asm/uaccess.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/ioctl.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
#include <linux/devfs_fs_kernel.h>

// #define DEBUG


#define DRIVER_VERSION "0.0.1"
#define DRIVER_DESC "USB for VIVI Driver, [e-mail]"

#include <linux/usb.h>

static __s32 vendor=-1, product=-1, read_timeout=0;

MODULE_AUTHOR("[e-mail]");
MODULE_DESCRIPTION(DRIVER_DESC" "DRIVER_VERSION);
MODULE_LICENSE("GPL");

MODULE_PARM(vendor, "i");
MODULE_PARM_DESC(vendor, "User specified USB idVendor");

MODULE_PARM(product, "i");
MODULE_PARM_DESC(product, "User specified USB idProduct");

MODULE_PARM(read_timeout, "i");
MODULE_PARM_DESC(read_timeout, "User specified read timeout in seconds");


/* WARNING: These DATA_DUMP's can produce a lot of data. Caveat Emptor. */
// #define RD_DATA_DUMP /* Enable to dump data - limited to 24 bytes */
// #define WR_DATA_DUMP /* DEBUG does not have to be defined. */

static struct usb_device_id vivi_s3c2410_device_ids [] = {
	/* SAMSUNG S3C2410 */
	{ USB_DEVICE(0x5345, 0x1234) }, /* usb of vivi for s3c2410 */
	{ }				/* Terminating entry */
};

MODULE_DEVICE_TABLE (usb, vivi_s3c2410_device_ids);

#define IS_EP_BULK(ep)  ((ep).bmAttributes == USB_ENDPOINT_XFER_BULK ? 1 : 0)
#define IS_EP_BULK_IN(ep) (IS_EP_BULK(ep) && ((ep).bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
#define IS_EP_BULK_OUT(ep) (IS_EP_BULK(ep) && ((ep).bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT)
#define IS_EP_INTR(ep) ((ep).bmAttributes == USB_ENDPOINT_XFER_INT ? 1 : 0)

#define USB_VIVI_MINOR(X) MINOR((X)->i_rdev) - VIVI_BASE_MNR

#ifdef DEBUG
#define VIVI_DEBUG(X) X
#else
#define VIVI_DEBUG(X)
#endif

#define IBUF_SIZE 4096
#define OBUF_SIZE 32768

/* read_vivi_s3c2410 timeouts -- RD_NAK_TIMEOUT * RD_EXPIRE = Number of seconds */
#define RD_NAK_TIMEOUT (10*HZ)	/* Default number of X seconds to wait */
#define RD_EXPIRE 12		/* Number of attempts to wait X seconds */


/* add by thisway 
 * some kernel doesn't define this struct devrequest
 */
typedef struct {
	__u8 requesttype;
	__u8 request;
	__u16 value;
	__u16 index;
	__u16 length;
} usb_devrequest __attribute__ ((packed));


/* read vendor and product IDs from the vivi_s3c2410 */
#define VIVI_IOCTL_VENDOR _IOR('U', 0x20, int)
#define VIVI_IOCTL_PRODUCT _IOR('U', 0x21, int)
/* send/recv a control message to the vivi_s3c2410 */
#define VIVI_IOCTL_CTRLMSG _IOWR('U', 0x22, usb_devrequest )


#define VIVI_MAX_MNR 	16		/* We're allocated 16 minors */
#define VIVI_BASE_MNR 	128		/* USB for VIVI start at minor 48 */

static DECLARE_MUTEX (vivi_mutex); /* Initializes to unlocked */

struct vivi_usb_data {
	struct usb_device *vivi_dev;
	devfs_handle_t devfs;	/* devfs device */
	struct urb vivi_irq;
	unsigned int ifnum;	/* Interface number of the USB device */
	kdev_t vivi_minor;	/* Scanner minor - used in disconnect() */
	unsigned char button;	/* Front panel buffer */
	char isopen;		/* Not zero if the device is open */
	char present;		/* Not zero if device is present */
	char *obuf, *ibuf;	/* transfer buffers */
	char bulk_in_ep, bulk_out_ep, intr_ep; /* Endpoint assignments */
	wait_queue_head_t rd_wait_q; /* read timeouts */
	struct semaphore sem; /* lock to prevent concurrent reads or writes */
	unsigned int rd_nak_timeout; /* Seconds to wait before read() timeout. */
};

extern devfs_handle_t usb_devfs_handle;

static struct vivi_usb_data *p_vivi_table[VIVI_MAX_MNR] = { NULL, /* ... */};

static struct usb_driver vivi_s3c2410_driver;