linux/drivers/watchdog/ibmasr.c

// SPDX-License-Identifier: GPL-1.0+
/*
 * IBM Automatic Server Restart driver.
 *
 * Copyright (c) 2005 Andrey Panin <[email protected]>
 *
 * Based on driver written by Pete Reynolds.
 * Copyright (c) IBM Corporation, 1998-2004.
 *
 */

#define pr_fmt(fmt) …

#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/timer.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
#include <linux/dmi.h>
#include <linux/io.h>
#include <linux/uaccess.h>


enum { … };

#define TOPAZ_ASR_REG_OFFSET …
#define TOPAZ_ASR_TOGGLE …
#define TOPAZ_ASR_DISABLE …

/* PEARL ASR S/W REGISTER SUPERIO PORT ADDRESSES */
#define PEARL_BASE …
#define PEARL_WRITE …
#define PEARL_READ …

#define PEARL_ASR_DISABLE_MASK …
#define PEARL_ASR_TOGGLE_MASK …

/* JASPER OFFSET FROM SIO BASE ADDR TO ASR S/W REGISTERS. */
#define JASPER_ASR_REG_OFFSET …

#define JASPER_ASR_DISABLE_MASK …
#define JASPER_ASR_TOGGLE_MASK …

#define JUNIPER_BASE_ADDRESS …
#define JUNIPER_ASR_DISABLE_MASK …
#define JUNIPER_ASR_TOGGLE_MASK …

#define SPRUCE_BASE_ADDRESS …
#define SPRUCE_ASR_DISABLE_MASK …
#define SPRUCE_ASR_TOGGLE_MASK …


static bool nowayout = … WATCHDOG_NOWAYOUT;

static unsigned long asr_is_open;
static char asr_expect_close;

static unsigned int asr_type, asr_base, asr_length;
static unsigned int asr_read_addr, asr_write_addr;
static unsigned char asr_toggle_mask, asr_disable_mask;
static DEFINE_SPINLOCK(asr_lock);

static void __asr_toggle(void)
{ … }

static void asr_toggle(void)
{ … }

static void asr_enable(void)
{ … }

static void asr_disable(void)
{ … }

static int __init asr_get_base_address(void)
{ … }


static ssize_t asr_write(struct file *file, const char __user *buf,
			 size_t count, loff_t *ppos)
{ … }

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

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

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

static const struct file_operations asr_fops = …;

static struct miscdevice asr_miscdev = …;


struct ibmasr_id { … };

static struct ibmasr_id ibmasr_id_table[] __initdata = …;

static int __init ibmasr_init(void)
{ … }

static void __exit ibmasr_exit(void)
{ … }

module_init(…) …;
module_exit(ibmasr_exit);

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

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