mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:56:48 +07:00
8b5942c391
These patches from Adrian fix: - ixp4xx_wdt:20d35f3e50
CC drivers/watchdog/ixp4xx_wdt.o ixp4xx_wdt.c:32: error: expected '=', ',', ';', 'asm' or '__attribute__' ixp4xx_wdt.c: In function 'wdt_enable': ixp4xx_wdt.c:41: error: 'wdt_lock' undeclared (first use in this ixp4xx_wdt.c:41: error: (Each undeclared identifier is reported only ixp4xx_wdt.c:41: error: for each function it appears in.) ixp4xx_wdt.c: In function 'wdt_disable': ixp4xx_wdt.c:52: error: 'wdt_lock' undeclared (first use in this ixp4xx_wdt.c: In function 'ixp4xx_wdt_init': ixp4xx_wdt.c:186: error: 'wdt_lock' undeclared (first use in this make[3]: *** [drivers/watchdog/ixp4xx_wdt.o] Error 1 - at91rm9200_wdt:2760600da2
CC drivers/watchdog/at91rm9200_wdt.o at91rm9200_wdt.c:188: error: 'at91_wdt_ioctl' undeclared here (not in a make[3]: *** [drivers/watchdog/at91rm9200_wdt.o] Error 1 - wdt285:d0e58eed05
CC [M] drivers/watchdog/wdt285.o wdt285.c: In function 'footbridge_watchdog_init': wdt285.c:211: error: 'KERN_WARN' undeclared (first use in this function) wdt285.c:211: error: (Each undeclared identifier is reported only once wdt285.c:211: error: for each function it appears in.) wdt285.c:212: error: expected ')' before string constant make[3]: *** [drivers/watchdog/wdt285.o] Error 1 And this patch from rmk: - s3c2410_wdt:41dc8b72e3
CC drivers/watchdog/s3c2410_wdt.o s3c2410_wdt.c: In function `s3c2410wdt_start': s3c2410_wdt.c:161: warning: `return' with a value, in function returning void Reported-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
231 lines
4.7 KiB
C
231 lines
4.7 KiB
C
/*
|
|
* Intel 21285 watchdog driver
|
|
* Copyright (c) Phil Blundell <pb@nexus.co.uk>, 1998
|
|
*
|
|
* based on
|
|
*
|
|
* SoftDog 0.05: A Software Watchdog Device
|
|
*
|
|
* (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/watchdog.h>
|
|
#include <linux/reboot.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/irq.h>
|
|
#include <mach/hardware.h>
|
|
|
|
#include <asm/mach-types.h>
|
|
#include <asm/hardware/dec21285.h>
|
|
|
|
/*
|
|
* Define this to stop the watchdog actually rebooting the machine.
|
|
*/
|
|
#undef ONLY_TESTING
|
|
|
|
static unsigned int soft_margin = 60; /* in seconds */
|
|
static unsigned int reload;
|
|
static unsigned long timer_alive;
|
|
|
|
#ifdef ONLY_TESTING
|
|
/*
|
|
* If the timer expires..
|
|
*/
|
|
static void watchdog_fire(int irq, void *dev_id)
|
|
{
|
|
printk(KERN_CRIT "Watchdog: Would Reboot.\n");
|
|
*CSR_TIMER4_CNTL = 0;
|
|
*CSR_TIMER4_CLR = 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Refresh the timer.
|
|
*/
|
|
static void watchdog_ping(void)
|
|
{
|
|
*CSR_TIMER4_LOAD = reload;
|
|
}
|
|
|
|
/*
|
|
* Allow only one person to hold it open
|
|
*/
|
|
static int watchdog_open(struct inode *inode, struct file *file)
|
|
{
|
|
int ret;
|
|
|
|
if (*CSR_SA110_CNTL & (1 << 13))
|
|
return -EBUSY;
|
|
|
|
if (test_and_set_bit(1, &timer_alive))
|
|
return -EBUSY;
|
|
|
|
reload = soft_margin * (mem_fclk_21285 / 256);
|
|
|
|
*CSR_TIMER4_CLR = 0;
|
|
watchdog_ping();
|
|
*CSR_TIMER4_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_AUTORELOAD
|
|
| TIMER_CNTL_DIV256;
|
|
|
|
#ifdef ONLY_TESTING
|
|
ret = request_irq(IRQ_TIMER4, watchdog_fire, 0, "watchdog", NULL);
|
|
if (ret) {
|
|
*CSR_TIMER4_CNTL = 0;
|
|
clear_bit(1, &timer_alive);
|
|
}
|
|
#else
|
|
/*
|
|
* Setting this bit is irreversible; once enabled, there is
|
|
* no way to disable the watchdog.
|
|
*/
|
|
*CSR_SA110_CNTL |= 1 << 13;
|
|
|
|
ret = 0;
|
|
#endif
|
|
nonseekable_open(inode, file);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Shut off the timer.
|
|
* Note: if we really have enabled the watchdog, there
|
|
* is no way to turn off.
|
|
*/
|
|
static int watchdog_release(struct inode *inode, struct file *file)
|
|
{
|
|
#ifdef ONLY_TESTING
|
|
free_irq(IRQ_TIMER4, NULL);
|
|
clear_bit(1, &timer_alive);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t watchdog_write(struct file *file, const char *data,
|
|
size_t len, loff_t *ppos)
|
|
{
|
|
/*
|
|
* Refresh the timer.
|
|
*/
|
|
if (len)
|
|
watchdog_ping();
|
|
|
|
return len;
|
|
}
|
|
|
|
static const struct watchdog_info ident = {
|
|
.options = WDIOF_SETTIMEOUT,
|
|
.identity = "Footbridge Watchdog",
|
|
};
|
|
|
|
static long watchdog_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
unsigned int new_margin;
|
|
int ret = -ENOTTY;
|
|
|
|
switch (cmd) {
|
|
case WDIOC_GETSUPPORT:
|
|
ret = 0;
|
|
if (copy_to_user((void *)arg, &ident, sizeof(ident)))
|
|
ret = -EFAULT;
|
|
break;
|
|
|
|
case WDIOC_GETSTATUS:
|
|
case WDIOC_GETBOOTSTATUS:
|
|
ret = put_user(0, (int *)arg);
|
|
break;
|
|
|
|
case WDIOC_KEEPALIVE:
|
|
watchdog_ping();
|
|
ret = 0;
|
|
break;
|
|
|
|
case WDIOC_SETTIMEOUT:
|
|
ret = get_user(new_margin, (int *)arg);
|
|
if (ret)
|
|
break;
|
|
|
|
/* Arbitrary, can't find the card's limits */
|
|
if (new_margin < 0 || new_margin > 60) {
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
soft_margin = new_margin;
|
|
reload = soft_margin * (mem_fclk_21285 / 256);
|
|
watchdog_ping();
|
|
/* Fall */
|
|
case WDIOC_GETTIMEOUT:
|
|
ret = put_user(soft_margin, (int *)arg);
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations watchdog_fops = {
|
|
.owner = THIS_MODULE,
|
|
.llseek = no_llseek,
|
|
.write = watchdog_write,
|
|
.unlocked_ioctl = watchdog_ioctl,
|
|
.open = watchdog_open,
|
|
.release = watchdog_release,
|
|
};
|
|
|
|
static struct miscdevice watchdog_miscdev = {
|
|
.minor = WATCHDOG_MINOR,
|
|
.name = "watchdog",
|
|
.fops = &watchdog_fops,
|
|
};
|
|
|
|
static int __init footbridge_watchdog_init(void)
|
|
{
|
|
int retval;
|
|
|
|
if (machine_is_netwinder())
|
|
return -ENODEV;
|
|
|
|
retval = misc_register(&watchdog_miscdev);
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
printk(KERN_INFO
|
|
"Footbridge Watchdog Timer: 0.01, timer margin: %d sec\n",
|
|
soft_margin);
|
|
|
|
if (machine_is_cats())
|
|
printk(KERN_WARNING
|
|
"Warning: Watchdog reset may not work on this machine.\n");
|
|
return 0;
|
|
}
|
|
|
|
static void __exit footbridge_watchdog_exit(void)
|
|
{
|
|
misc_deregister(&watchdog_miscdev);
|
|
}
|
|
|
|
MODULE_AUTHOR("Phil Blundell <pb@nexus.co.uk>");
|
|
MODULE_DESCRIPTION("Footbridge watchdog driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
|
|
|
module_param(soft_margin, int, 0);
|
|
MODULE_PARM_DESC(soft_margin, "Watchdog timeout in seconds");
|
|
|
|
module_init(footbridge_watchdog_init);
|
|
module_exit(footbridge_watchdog_exit);
|