linux/drivers/watchdog/sbc_fitpc2_wdt.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Watchdog driver for SBC-FITPC2 board
 *
 * Author: Denis Turischev <[email protected]>
 *
 * Adapted from the IXP2000 watchdog driver by Deepak Saxena.
 *
 */

#define pr_fmt(fmt) …

#include <linux/module.h>
#include <linux/types.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/dmi.h>
#include <linux/io.h>
#include <linux/uaccess.h>


static bool nowayout = … WATCHDOG_NOWAYOUT;
static unsigned int margin = …;	/* (secs) Default is 1 minute */
static unsigned long wdt_status;
static DEFINE_MUTEX(wdt_lock);

#define WDT_IN_USE …
#define WDT_OK_TO_CLOSE …

#define COMMAND_PORT …
#define DATA_PORT …

#define IFACE_ON_COMMAND …
#define REBOOT_COMMAND …

#define WATCHDOG_NAME …

static void wdt_send_data(unsigned char command, unsigned char data)
{ … }

static void wdt_enable(void)
{ … }

static void wdt_disable(void)
{ … }

static int fitpc2_wdt_open(struct inode *inode, struct file *file)
{ … }

static ssize_t fitpc2_wdt_write(struct file *file, const char __user *data,
						size_t len, loff_t *ppos)
{ … }


static const struct watchdog_info ident = …;


static long fitpc2_wdt_ioctl(struct file *file, unsigned int cmd,
							unsigned long arg)
{ … }

static int fitpc2_wdt_release(struct inode *inode, struct file *file)
{ … }


static const struct file_operations fitpc2_wdt_fops = …;

static struct miscdevice fitpc2_wdt_miscdev = …;

static int __init fitpc2_wdt_init(void)
{ … }

static void __exit fitpc2_wdt_exit(void)
{ … }

module_init(…) …;
module_exit(fitpc2_wdt_exit);

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;

module_param(margin, int, 0);
MODULE_PARM_DESC(…) …;

module_param(nowayout, bool, 0);
MODULE_PARM_DESC(…) …;

MODULE_LICENSE(…) …;