linux-imx

/*

 *  National Semiconductor PC87307/PC97307 (ala SC1200) WDT driver

 *  (c) Copyright 2002 Zwane Mwaikambo <zwane@commfireservices.com>,

 *          All Rights Reserved.

 *  Based on wdt.c and wdt977.c by Alan Cox and Woody Suwalski respectively.

 *

 *  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.

 *

 *  The author(s) of this software shall not be held liable for damages

 *  of any nature resulting due to the use of this software. This

 *  software is provided AS-IS with no warranties.

 *

 *  Changelog:

 *  20020220 Zwane Mwaikambo    Code based on datasheet, no hardware.

 *  20020221 Zwane Mwaikambo    Cleanups as suggested by Jeff Garzik

 *                  and Alan Cox.

 *  20020222 Zwane Mwaikambo    Added probing.

 *  20020225 Zwane Mwaikambo    Added ISAPNP support.

 *  20020412 Rob Radez      Broke out start/stop functions

 *       <rob@osinvestor.com>   Return proper status instead of

 *                  temperature warning

 *                  Add WDIOC_GETBOOTSTATUS and

 *                  WDIOC_SETOPTIONS ioctls

 *                  Fix CONFIG_WATCHDOG_NOWAYOUT

 *  20020530 Joel Becker        Add Matt Domsch's nowayout module

 *                  option

 *  20030116 Adam Belay     Updated to the latest pnp code

 *

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/miscdevice.h>

#include <linux/watchdog.h>

#include <linux/ioport.h>

#include <linux/spinlock.h>

#include <linux/notifier.h>

#include <linux/reboot.h>

#include <linux/init.h>

#include <linux/pnp.h>

#include <linux/fs.h>

#include <linux/semaphore.h>

#include <linux/io.h>

#include <linux/uaccess.h>

​

#define SC1200_MODULE_VER   "build 20020303"

#define SC1200_MODULE_NAME  "sc1200wdt"

​

#define MAX_TIMEOUT 255 /* 255 minutes */

#define PMIR        (io)    /* Power Management Index Register */

#define PMDR        (io+1)  /* Power Management Data Register */

​

/* Data Register indexes */

#define FER1        0x00    /* Function enable register 1 */

#define FER2        0x01    /* Function enable register 2 */

#define PMC1        0x02    /* Power Management Ctrl 1 */

#define PMC2        0x03    /* Power Management Ctrl 2 */

#define PMC3        0x04    /* Power Management Ctrl 3 */