linux-imx

/*

 * RDC321x watchdog driver

 *

 * Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org>

 *

 * This driver is highly inspired from the cpu5_wdt driver

 *

 * 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/moduleparam.h>

#include <linux/types.h>

#include <linux/errno.h>

#include <linux/miscdevice.h>

#include <linux/fs.h>

#include <linux/ioport.h>

#include <linux/timer.h>

#include <linux/completion.h>

#include <linux/jiffies.h>

#include <linux/platform_device.h>

#include <linux/watchdog.h>

#include <linux/io.h>

#include <linux/uaccess.h>

#include <linux/mfd/rdc321x.h>

​

#define RDC_WDT_MASK    0x80000000 /* Mask */

#define RDC_WDT_EN  0x00800000 /* Enable bit */

#define RDC_WDT_WTI 0x00200000 /* Generate CPU reset/NMI/WDT on timeout */

#define RDC_WDT_RST 0x00100000 /* Reset bit */

#define RDC_WDT_WIF 0x00040000 /* WDT IRQ Flag */

#define RDC_WDT_IRT 0x00000100 /* IRQ Routing table */

#define RDC_WDT_CNT 0x00000001 /* WDT count */

​

#define RDC_CLS_TMR 0x80003844 /* Clear timer */

​

#define RDC_WDT_INTERVAL    (HZ/10+1)

​

static int ticks = 1000;

​

/* some device data */

​

static struct {

    struct completion stop;

    int running;

    struct timer_list timer;

    int queue;

    int default_ticks;

    unsigned long inuse;

    spinlock_t lock;