usbd-serialnumber.c

Linux2.4.20针对三星公司的s3c2440内核基础上的一些设备驱动代码

/*
 * linux/drivers/usbd/usbd-serialnumber.c - USB Device Cable Monitor
 *
 * Copyright (c) 2000, 2001, 2002 Lineo
 * Copyright (c) 2001 Hewlett Packard
 *
 * By: 
 *      Stuart Lynne <[e-mail]>, 
 *      Tom Rushworth <[e-mail]>, 
 *      Bruce Balden <[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/config.h>
#include <linux/module.h>

#include "usbd-export.h"
#include "usbd-build.h"
#include "usbd-module.h"

MODULE_AUTHOR ("[e-mail], [e-mail]");
MODULE_DESCRIPTION ("USB Device Monitor");
USBD_MODULE_INFO ("usbd_monitor 0.2-alpha");

EXPORT_NO_SYMBOLS;

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <asm/uaccess.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <net/arp.h>
#include <linux/rtnetlink.h>
#include <linux/smp_lock.h>
#include <linux/ctype.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/pkt_sched.h>
#include <asm/io.h>
#include <linux/proc_fs.h>
#include <linux/kmod.h>


/*
 * Architecture specific includes
 */

#ifdef CONFIG_ARCH_SA1100

#include <asm/irq.h>
#include <asm/hardware.h>

#include "usbd.h"
#include "usbd-func.h"
#include "usbd-bus.h"
#include "hotplug.h"
#include "bi/sa1100.h"
#endif

#if defined(CONFIG_PM)
#include <linux/pm.h>
#endif

#ifdef CONFIG_SA1100_BITSY
#include <linux/h3600_ts.h>
#endif

/* Module Parameters ************************************************************************* */

#ifdef CONFIG_USBD_PROCFS

/* Proc Filesystem *************************************************************************** */

/* *
 * usbd_device_proc_read - implement proc file system read.
 * @file
 * @buf
 * @count
 * @pos
 *
 * Standard proc file system read function.
 *
 * We let upper layers iterate for us, *pos will indicate which device to return
 * statistics for.
 */
static ssize_t proc_read_serial (struct file *file, char *buf, size_t count, loff_t * pos)
{
	unsigned long page;
	int len = 0;
	int index;

	// get a page, max 4095 bytes of data...
	if (!(page = get_free_page (GFP_KERNEL))) {
		return -ENOMEM;
	}

	len = 0;
	index = (*pos)++;

	if (index == 0) {
		len += sprintf ((char *) page + len, "Serial: ");

#ifdef CONFIG_SA1100_BITSY
		if (machine_is_bitsy ()) {
			char serial_number[22];
			int i;
			int j;
			memset (&serial_number, 0, sizeof (serial_number));
			for (i = 0, j = 0; i < 20; i++, j++) {
				char buf[4];
				h3600_eeprom_read (5 + i, buf, 2);
				serial_number[j] = buf[1];
			}
			len += sprintf ((char *) page + len, "%s", serial_number);
		}
#endif

#ifdef CONFIG_SA1100_CALYPSO
		if (machine_is_calypso ()) {
			__u32 eerom_serial;
			int i;
			if ((i =
			     CalypsoIicGet (IIC_ADDRESS_SERIAL0, (unsigned char *) &eerom_serial,
					    sizeof (eerom_serial)))) {
				bus->serial_number = eerom_serial;
			}
			len += sprintf ((char *) page + len, "%x", eerom_serial);
		}
#endif

		len += sprintf ((char *) page + len, "\n");
	}


	if (len > count) {
		len = -EINVAL;
	} else if (len > 0 && copy_to_user (buf, (char *) page, len)) {
		len = -EFAULT;
	}
	free_page (page);
	return len;
}

static struct file_operations proc_read_serial_ops = {
	read:proc_read_serial,
};


#endif


/* Module Init ******************************************************************************* */


/**
 * monitor_modinit - commission bus interface driver
 *
 */
static int __init monitor_modinit (void)
{
	struct proc_dir_entry *p;

#ifndef CONFIG_USBD_PROCFS
	return -EINVAL;
#else
	printk (KERN_INFO "usbdm: %s\n", __usbd_module_info);

	// create proc filesystem entry
	if ((p = create_proc_entry ("usb-serial-number", 0, 0)) == NULL)
		return -ENOMEM;

	p->proc_fops = &proc_read_serial_ops;

	printk (KERN_INFO "monitor_modinit: finished\n");

	return 0;
#endif
}


/**
 * monitor_modexit - decommission bus interface driver
 *
 */
static void __exit monitor_modexit (void)
{

	printk (KERN_INFO "\n");

	remove_proc_entry ("usb-serial-number", NULL);

	printk (KERN_INFO "monitor_modexit:\n");

	return;
}


module_init (monitor_modinit);
module_exit (monitor_modexit);