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Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog

Browse source 
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
  [WATCHDOG] removed unused #include <version.h>
  [WATCHDOG] at91rm9200_wdt.c: fix misleading indentation
  [WATCHDOG] mpc8xxx_wdt: fix modular build
  [WATCHDOG] hpwdt.c kdebug support
  [WATCHDOG] Add support for the IDT RC32434 watchdog
  [WATCHDOG] Add support for the built-int RDC R-321x SoC watchdog
  [WATHDOG] delete unused driver mpc8xx_wdt.c
  [WATCHDOG] Fix s3c2410_wdt driver coding style issues
  [WATCHDOG] Clean out header of s3c2410_wdt driver.
  [WATCHDOG] Fix NULL usage in s3c2410_wdt driver.
This commit is contained in:
Linus Torvalds 2008-08-27 14:37:28 -07:00
commit ee7cbabbd3
10 changed files with 714 additions and 235 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
drivers/watchdog/Kconfig
View file

@ -465,6 +465,16 @@ config PC87413_WDT
Most people will say N.
config RDC321X_WDT
tristate "RDC R-321x SoC watchdog"
depends on X86_RDC321X
help
This is the driver for the built in hardware watchdog
in the RDC R-321x SoC.
To compile this driver as a module, choose M here: the
module will be called rdc321x_wdt.
config 60XX_WDT
tristate "SBC-60XX Watchdog Timer"
depends on X86
@ -633,6 +643,16 @@ config SBC_EPX_C3_WATCHDOG
# MIPS Architecture
config RC32434_WDT
tristate "IDT RC32434 SoC Watchdog Timer"
depends on MIKROTIK_RB532
help
Hardware driver for the IDT RC32434 SoC built-in
watchdog timer.
To compile this driver as a module, choose M here: the
module will be called rc32434_wdt.
config INDYDOG
tristate "Indy/I2 Hardware Watchdog"
depends on SGI_HAS_INDYDOG
@ -692,10 +712,6 @@ config MPC5200_WDT
tristate "MPC5200 Watchdog Timer"
depends on PPC_MPC52xx
config 8xx_WDT
tristate "MPC8xx Watchdog Timer"
depends on 8xx
config 8xxx_WDT
tristate "MPC8xxx Platform Watchdog Timer"
depends on PPC_8xx || PPC_83xx || PPC_86xx

3
drivers/watchdog/Makefile
View file

@ -75,6 +75,7 @@ obj-$(CONFIG_HP_WATCHDOG) += hpwdt.o
obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o
obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o
obj-$(CONFIG_PC87413_WDT) += pc87413_wdt.o
obj-$(CONFIG_RDC321X_WDT) += rdc321x_wdt.o
obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o
obj-$(CONFIG_SBC8360_WDT) += sbc8360.o
obj-$(CONFIG_SBC7240_WDT) += sbc7240_wdt.o
@ -94,6 +95,7 @@ obj-$(CONFIG_SBC_EPX_C3_WATCHDOG) += sbc_epx_c3.o
# M68KNOMMU Architecture
# MIPS Architecture
obj-$(CONFIG_RC32434_WDT) += rc32434_wdt.o
obj-$(CONFIG_INDYDOG) += indydog.o
obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o
obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o
@ -104,7 +106,6 @@ obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
# PARISC Architecture
# POWERPC Architecture
obj-$(CONFIG_8xx_WDT) += mpc8xx_wdt.o
obj-$(CONFIG_MPC5200_WDT) += mpc5200_wdt.o
obj-$(CONFIG_8xxx_WDT) += mpc8xxx_wdt.o
obj-$(CONFIG_MV64X60_WDT) += mv64x60_wdt.o

2
drivers/watchdog/at91rm9200_wdt.c
View file

@ -241,7 +241,7 @@ static int at91wdt_resume(struct platform_device *pdev)
{
if (at91wdt_busy)
at91_wdt_start();
return 0;
return 0;
}
#else

93
drivers/watchdog/hpwdt.c
View file

@ -116,6 +116,7 @@ static unsigned int reload; /* the computed soft_margin */
static int nowayout = WATCHDOG_NOWAYOUT;
static char expect_release;
static unsigned long hpwdt_is_open;
static unsigned int allow_kdump;
static void __iomem *pci_mem_addr; /* the PCI-memory address */
static unsigned long __iomem *hpwdt_timer_reg;
@ -221,19 +222,19 @@ static int __devinit cru_detect(unsigned long map_entry,
if (cmn_regs.u1.ral != 0) {
printk(KERN_WARNING
"hpwdt: Call succeeded but with an error: 0x%x\n",
cmn_regs.u1.ral);
"hpwdt: Call succeeded but with an error: 0x%x\n",
cmn_regs.u1.ral);
} else {
physical_bios_base = cmn_regs.u2.rebx;
physical_bios_offset = cmn_regs.u4.redx;
cru_length = cmn_regs.u3.recx;
cru_physical_address =
physical_bios_base + physical_bios_offset;
physical_bios_base + physical_bios_offset;
/* If the values look OK, then map it in. */
if ((physical_bios_base + physical_bios_offset)) {
cru_rom_addr =
ioremap(cru_physical_address, cru_length);
ioremap(cru_physical_address, cru_length);
if (cru_rom_addr)
retval = 0;
}
@ -356,7 +357,6 @@ asm(".text \n\t"
"call *%r12 \n\t"
"pushfq \n\t"
"popq %r12 \n\t"
"popfq \n\t"
"movl %eax, (%r9) \n\t"
"movl %ebx, 4(%r9) \n\t"
"movl %ecx, 8(%r9) \n\t"
@ -390,10 +390,10 @@ static void __devinit dmi_find_cru(const struct dmi_header *dm)
smbios_cru64_ptr = (struct smbios_cru64_info *) dm;
if (smbios_cru64_ptr->signature == CRU_BIOS_SIGNATURE_VALUE) {
cru_physical_address =
smbios_cru64_ptr->physical_address +
smbios_cru64_ptr->double_offset;
smbios_cru64_ptr->physical_address +
smbios_cru64_ptr->double_offset;
cru_rom_addr = ioremap(cru_physical_address,
smbios_cru64_ptr->double_length);
smbios_cru64_ptr->double_length);
}
}
}
@ -405,41 +405,13 @@ static int __devinit detect_cru_service(void)
dmi_walk(dmi_find_cru);
/* if cru_rom_addr has been set then we found a CRU service */
return ((cru_rom_addr != NULL) ? 0: -ENODEV);
return ((cru_rom_addr != NULL) ? 0 : -ENODEV);
}
/* ------------------------------------------------------------------------- */
#endif
/*
* NMI Handler
*/
static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,
void *data)
{
unsigned long rom_pl;
static int die_nmi_called;
if (ulReason != DIE_NMI && ulReason != DIE_NMI_IPI)
return NOTIFY_OK;
spin_lock_irqsave(&rom_lock, rom_pl);
if (!die_nmi_called)
asminline_call(&cmn_regs, cru_rom_addr);
die_nmi_called = 1;
spin_unlock_irqrestore(&rom_lock, rom_pl);
if (cmn_regs.u1.ral == 0) {
printk(KERN_WARNING "hpwdt: An NMI occurred, "
"but unable to determine source.\n");
} else {
panic("An NMI occurred, please see the Integrated "
"Management Log for details.\n");
}
return NOTIFY_STOP;
}
/*
* Watchdog operations
*/
@ -483,6 +455,36 @@ static int hpwdt_change_timer(int new_margin)
return 0;
}
/*
* NMI Handler
*/
static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,
void *data)
{
unsigned long rom_pl;
static int die_nmi_called;
if (ulReason != DIE_NMI && ulReason != DIE_NMI_IPI)
return NOTIFY_OK;
spin_lock_irqsave(&rom_lock, rom_pl);
if (!die_nmi_called)
asminline_call(&cmn_regs, cru_rom_addr);
die_nmi_called = 1;
spin_unlock_irqrestore(&rom_lock, rom_pl);
if (cmn_regs.u1.ral == 0) {
printk(KERN_WARNING "hpwdt: An NMI occurred, "
"but unable to determine source.\n");
} else {
if (allow_kdump)
hpwdt_stop();
panic("An NMI occurred, please see the Integrated "
"Management Log for details.\n");
}
return NOTIFY_STOP;
}
/*
* /dev/watchdog handling
*/
@ -625,17 +627,18 @@ static struct notifier_block die_notifier = {
*/
static int __devinit hpwdt_init_one(struct pci_dev *dev,
const struct pci_device_id *ent)
const struct pci_device_id *ent)
{
int retval;
/*
* First let's find out if we are on an iLO2 server. We will
* not run on a legacy ASM box.
* So we only support the G5 ProLiant servers and higher.
*/
if (dev->subsystem_vendor != PCI_VENDOR_ID_HP) {
dev_warn(&dev->dev,
"This server does not have an iLO2 ASIC.\n");
"This server does not have an iLO2 ASIC.\n");
return -ENODEV;
}
@ -669,7 +672,7 @@ static int __devinit hpwdt_init_one(struct pci_dev *dev,
retval = detect_cru_service();
if (retval < 0) {
dev_warn(&dev->dev,
"Unable to detect the %d Bit CRU Service.\n",
"Unable to detect the %d Bit CRU Service.\n",
HPWDT_ARCH);
goto error_get_cru;
}
@ -684,7 +687,7 @@ static int __devinit hpwdt_init_one(struct pci_dev *dev,
retval = register_die_notifier(&die_notifier);
if (retval != 0) {
dev_warn(&dev->dev,
"Unable to register a die notifier (err=%d).\n",
"Unable to register a die notifier (err=%d).\n",
retval);
goto error_die_notifier;
}
@ -699,8 +702,9 @@ static int __devinit hpwdt_init_one(struct pci_dev *dev,
printk(KERN_INFO
"hp Watchdog Timer Driver: 1.00"
", timer margin: %d seconds( nowayout=%d).\n",
soft_margin, nowayout);
", timer margin: %d seconds (nowayout=%d)"
", allow kernel dump: %s (default = 0/OFF).\n",
soft_margin, nowayout, (allow_kdump == 0) ? "OFF" : "ON");
return 0;
@ -755,6 +759,9 @@ MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
module_param(soft_margin, int, 0);
MODULE_PARM_DESC(soft_margin, "Watchdog timeout in seconds");
module_param(allow_kdump, int, 0);
MODULE_PARM_DESC(allow_kdump, "Start a kernel dump after NMI occurs");
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");

170
drivers/watchdog/mpc8xx_wdt.c
View file

@ -1,170 +0,0 @@
/*
* mpc8xx_wdt.c - MPC8xx watchdog userspace interface
*
* Author: Florian Schirmer <jolt@tuxbox.org>
*
* 2002 (c) Florian Schirmer <jolt@tuxbox.org> This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/watchdog.h>
#include <asm/8xx_immap.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <syslib/m8xx_wdt.h>
static unsigned long wdt_opened;
static int wdt_status;
static spinlock_t wdt_lock;
static void mpc8xx_wdt_handler_disable(void)
{
volatile uint __iomem *piscr;
piscr = (uint *)&((immap_t *)IMAP_ADDR)->im_sit.sit_piscr;
if (!m8xx_has_internal_rtc)
m8xx_wdt_stop_timer();
else
out_be32(piscr, in_be32(piscr) & ~(PISCR_PIE | PISCR_PTE));
printk(KERN_NOTICE "mpc8xx_wdt: keep-alive handler deactivated\n");
}
static void mpc8xx_wdt_handler_enable(void)
{
volatile uint __iomem *piscr;
piscr = (uint *)&((immap_t *)IMAP_ADDR)->im_sit.sit_piscr;
if (!m8xx_has_internal_rtc)
m8xx_wdt_install_timer();
else
out_be32(piscr, in_be32(piscr) | PISCR_PIE | PISCR_PTE);
printk(KERN_NOTICE "mpc8xx_wdt: keep-alive handler activated\n");
}
static int mpc8xx_wdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(0, &wdt_opened))
return -EBUSY;
m8xx_wdt_reset();
mpc8xx_wdt_handler_disable();
return nonseekable_open(inode, file);
}
static int mpc8xx_wdt_release(struct inode *inode, struct file *file)
{
m8xx_wdt_reset();
#if !defined(CONFIG_WATCHDOG_NOWAYOUT)
mpc8xx_wdt_handler_enable();
#endif
clear_bit(0, &wdt_opened);
return 0;
}
static ssize_t mpc8xx_wdt_write(struct file *file, const char *data,
size_t len, loff_t *ppos)
{
if (len) {
spin_lock(&wdt_lock);
m8xx_wdt_reset();
spin_unlock(&wdt_lock);
}
return len;
}
static long mpc8xx_wdt_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
int timeout;
static struct watchdog_info info = {
.options = WDIOF_KEEPALIVEPING,
.firmware_version = 0,
.identity = "MPC8xx watchdog",
};
switch (cmd) {
case WDIOC_GETSUPPORT:
if (copy_to_user((void *)arg, &info, sizeof(info)))
return -EFAULT;
break;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
if (put_user(wdt_status, (int *)arg))
return -EFAULT;
wdt_status &= ~WDIOF_KEEPALIVEPING;
break;
case WDIOC_GETTEMP:
return -EOPNOTSUPP;
case WDIOC_SETOPTIONS:
return -EOPNOTSUPP;
case WDIOC_KEEPALIVE:
spin_lock(&wdt_lock);
m8xx_wdt_reset();
wdt_status |= WDIOF_KEEPALIVEPING;
spin_unlock(&wdt_lock);
break;
case WDIOC_SETTIMEOUT:
return -EOPNOTSUPP;
case WDIOC_GETTIMEOUT:
spin_lock(&wdt_lock);
timeout = m8xx_wdt_get_timeout();
spin_unlock(&wdt_lock);
if (put_user(timeout, (int *)arg))
return -EFAULT;
break;
default:
return -ENOTTY;
}
return 0;
}
static const struct file_operations mpc8xx_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = mpc8xx_wdt_write,
.unlocked_ioctl = mpc8xx_wdt_ioctl,
.open = mpc8xx_wdt_open,
.release = mpc8xx_wdt_release,
};
static struct miscdevice mpc8xx_wdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &mpc8xx_wdt_fops,
};
static int __init mpc8xx_wdt_init(void)
{
spin_lock_init(&wdt_lock);
return misc_register(&mpc8xx_wdt_miscdev);
}
static void __exit mpc8xx_wdt_exit(void)
{
misc_deregister(&mpc8xx_wdt_miscdev);
m8xx_wdt_reset();
mpc8xx_wdt_handler_enable();
}
module_init(mpc8xx_wdt_init);
module_exit(mpc8xx_wdt_exit);
MODULE_AUTHOR("Florian Schirmer <jolt@tuxbox.org>");
MODULE_DESCRIPTION("MPC8xx watchdog driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);

11
drivers/watchdog/mpc8xxx_wdt.c
View file

@ -48,6 +48,7 @@ struct mpc8xxx_wdt_type {
};
static struct mpc8xxx_wdt __iomem *wd_base;
static int mpc8xxx_wdt_init_late(void);
static u16 timeout = 0xffff;
module_param(timeout, ushort, 0);
@ -213,6 +214,12 @@ static int __devinit mpc8xxx_wdt_probe(struct of_device *ofdev,
else
timeout_sec = timeout / freq;
#ifdef MODULE
ret = mpc8xxx_wdt_init_late();
if (ret)
goto err_unmap;
#endif
pr_info("WDT driver for MPC8xxx initialized. mode:%s timeout=%d "
"(%d seconds)\n", reset ? "reset" : "interrupt", timeout,
timeout_sec);
@ -280,7 +287,7 @@ static struct of_platform_driver mpc8xxx_wdt_driver = {
* very early to start pinging the watchdog (misc devices are not yet
* available), and later module_init() just registers the misc device.
*/
static int __init mpc8xxx_wdt_init_late(void)
static int mpc8xxx_wdt_init_late(void)
{
int ret;
@ -295,7 +302,9 @@ static int __init mpc8xxx_wdt_init_late(void)
}
return 0;
}
#ifndef MODULE
module_init(mpc8xxx_wdt_init_late);
#endif
static int __init mpc8xxx_wdt_init(void)
{

1
drivers/watchdog/pc87413_wdt.c
View file

@ -30,7 +30,6 @@
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/moduleparam.h>
#include <linux/version.h>
#include <linux/io.h>
#include <linux/uaccess.h>

344
drivers/watchdog/rc32434_wdt.c Normal file
View file

@ -0,0 +1,344 @@
/*
* IDT Interprise 79RC32434 watchdog driver
*
* Copyright (C) 2006, Ondrej Zajicek <santiago@crfreenet.org>
* Copyright (C) 2008, Florian Fainelli <florian@openwrt.org>
*
* 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/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/smp_lock.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h>
#include <asm/bootinfo.h>
#include <asm/time.h>
#include <asm/mach-rc32434/integ.h>
#define MAX_TIMEOUT 20
#define RC32434_WDT_INTERVAL (15 * HZ)
#define VERSION "0.2"
static struct {
struct completion stop;
int running;
struct timer_list timer;
int queue;
int default_ticks;
unsigned long inuse;
} rc32434_wdt_device;
static struct integ __iomem *wdt_reg;
static int ticks = 100 * HZ;
static int expect_close;
static int timeout;
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
static void rc32434_wdt_start(void)
{
u32 val;
if (!rc32434_wdt_device.inuse) {
writel(0, &wdt_reg->wtcount);
val = RC32434_ERR_WRE;
writel(readl(&wdt_reg->errcs) | val, &wdt_reg->errcs);
val = RC32434_WTC_EN;
writel(readl(&wdt_reg->wtc) | val, &wdt_reg->wtc);
}
rc32434_wdt_device.running++;
}
static void rc32434_wdt_stop(void)
{
u32 val;
if (rc32434_wdt_device.running) {
val = ~RC32434_WTC_EN;
writel(readl(&wdt_reg->wtc) & val, &wdt_reg->wtc);
val = ~RC32434_ERR_WRE;
writel(readl(&wdt_reg->errcs) & val, &wdt_reg->errcs);
rc32434_wdt_device.running = 0;
}
}
static void rc32434_wdt_set(int new_timeout)
{
u32 cmp = new_timeout * HZ;
u32 state, val;
timeout = new_timeout;
/*
* store and disable WTC
*/
state = (u32)(readl(&wdt_reg->wtc) & RC32434_WTC_EN);
val = ~RC32434_WTC_EN;
writel(readl(&wdt_reg->wtc) & val, &wdt_reg->wtc);
writel(0, &wdt_reg->wtcount);
writel(cmp, &wdt_reg->wtcompare);
/*
* restore WTC
*/
writel(readl(&wdt_reg->wtc) | state, &wdt_reg);
}
static void rc32434_wdt_reset(void)
{
ticks = rc32434_wdt_device.default_ticks;
}
static void rc32434_wdt_update(unsigned long unused)
{
if (rc32434_wdt_device.running)
ticks--;
writel(0, &wdt_reg->wtcount);
if (rc32434_wdt_device.queue && ticks)
mod_timer(&rc32434_wdt_device.timer,
jiffies + RC32434_WDT_INTERVAL);
else
complete(&rc32434_wdt_device.stop);
}
static int rc32434_wdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(0, &rc32434_wdt_device.inuse))
return -EBUSY;
if (nowayout)
__module_get(THIS_MODULE);
return nonseekable_open(inode, file);
}
static int rc32434_wdt_release(struct inode *inode, struct file *file)
{
if (expect_close && nowayout == 0) {
rc32434_wdt_stop();
printk(KERN_INFO KBUILD_MODNAME ": disabling watchdog timer\n");
module_put(THIS_MODULE);
} else
printk(KERN_CRIT KBUILD_MODNAME
": device closed unexpectedly. WDT will not stop !\n");
clear_bit(0, &rc32434_wdt_device.inuse);
return 0;
}
static ssize_t rc32434_wdt_write(struct file *file, const char *data,
size_t len, loff_t *ppos)
{
if (len) {
if (!nowayout) {
size_t i;
/* In case it was set long ago */
expect_close = 0;
for (i = 0; i != len; i++) {
char c;
if (get_user(c, data + i))
return -EFAULT;
if (c == 'V')
expect_close = 1;
}
}
rc32434_wdt_update(0);
return len;
}
return 0;
}
static int rc32434_wdt_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int new_timeout;
unsigned int value;
static struct watchdog_info ident = {
.options = WDIOF_SETTIMEOUT |
WDIOF_KEEPALIVEPING |
WDIOF_MAGICCLOSE,
.identity = "RC32434_WDT Watchdog",
};
switch (cmd) {
case WDIOC_KEEPALIVE:
rc32434_wdt_reset();
break;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
value = readl(&wdt_reg->wtcount);
if (copy_to_user(argp, &value, sizeof(int)))
return -EFAULT;
break;
case WDIOC_GETSUPPORT:
if (copy_to_user(argp, &ident, sizeof(ident)))
return -EFAULT;
break;
case WDIOC_SETOPTIONS:
if (copy_from_user(&value, argp, sizeof(int)))
return -EFAULT;
switch (value) {
case WDIOS_ENABLECARD:
rc32434_wdt_start();
break;
case WDIOS_DISABLECARD:
rc32434_wdt_stop();
default:
return -EINVAL;
}
break;
case WDIOC_SETTIMEOUT:
if (copy_from_user(&new_timeout, argp, sizeof(int)))
return -EFAULT;
if (new_timeout < 1)
return -EINVAL;
if (new_timeout > MAX_TIMEOUT)
return -EINVAL;
rc32434_wdt_set(new_timeout);
case WDIOC_GETTIMEOUT:
return copy_to_user(argp, &timeout, sizeof(int));
default:
return -ENOTTY;
}
return 0;
}
static struct file_operations rc32434_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = rc32434_wdt_write,
.ioctl = rc32434_wdt_ioctl,
.open = rc32434_wdt_open,
.release = rc32434_wdt_release,
};
static struct miscdevice rc32434_wdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &rc32434_wdt_fops,
};
static char banner[] = KERN_INFO KBUILD_MODNAME
": Watchdog Timer version " VERSION ", timer margin: %d sec\n";
static int rc32434_wdt_probe(struct platform_device *pdev)
{
int ret;
struct resource *r;
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rb500_wdt_res");
if (!r) {
printk(KERN_ERR KBUILD_MODNAME
"failed to retrieve resources\n");
return -ENODEV;
}
wdt_reg = ioremap_nocache(r->start, r->end - r->start);
if (!wdt_reg) {
printk(KERN_ERR KBUILD_MODNAME
"failed to remap I/O resources\n");
return -ENXIO;
}
ret = misc_register(&rc32434_wdt_miscdev);
if (ret < 0) {
printk(KERN_ERR KBUILD_MODNAME
"failed to register watchdog device\n");
goto unmap;
}
init_completion(&rc32434_wdt_device.stop);
rc32434_wdt_device.queue = 0;
clear_bit(0, &rc32434_wdt_device.inuse);
setup_timer(&rc32434_wdt_device.timer, rc32434_wdt_update, 0L);
rc32434_wdt_device.default_ticks = ticks;
rc32434_wdt_start();
printk(banner, timeout);
return 0;
unmap:
iounmap(wdt_reg);
return ret;
}
static int rc32434_wdt_remove(struct platform_device *pdev)
{
if (rc32434_wdt_device.queue) {
rc32434_wdt_device.queue = 0;
wait_for_completion(&rc32434_wdt_device.stop);
}
misc_deregister(&rc32434_wdt_miscdev);
iounmap(wdt_reg);
return 0;
}
static struct platform_driver rc32434_wdt = {
.probe = rc32434_wdt_probe,
.remove = rc32434_wdt_remove,
.driver = {
.name = "rc32434_wdt",
}
};
static int __init rc32434_wdt_init(void)
{
return platform_driver_register(&rc32434_wdt);
}
static void __exit rc32434_wdt_exit(void)
{
platform_driver_unregister(&rc32434_wdt);
}
module_init(rc32434_wdt_init);
module_exit(rc32434_wdt_exit);
MODULE_AUTHOR("Ondrej Zajicek <santiago@crfreenet.org>,"
"Florian Fainelli <florian@openwrt.org>");
MODULE_DESCRIPTION("Driver for the IDT RC32434 SoC watchdog");
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);

285
drivers/watchdog/rdc321x_wdt.c Normal file
View file

@ -0,0 +1,285 @@
/*
* RDC321x watchdog driver
*
* Copyright (C) 2007 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/init.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 <asm/mach-rdc321x/rdc321x_defs.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;
} rdc321x_wdt_device;
/* generic helper functions */
static void rdc321x_wdt_trigger(unsigned long unused)
{
unsigned long flags;
if (rdc321x_wdt_device.running)
ticks--;
/* keep watchdog alive */
spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
outl(RDC_WDT_EN | inl(RDC3210_CFGREG_DATA),
RDC3210_CFGREG_DATA);
spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
/* requeue?? */
if (rdc321x_wdt_device.queue && ticks)
mod_timer(&rdc321x_wdt_device.timer,
jiffies + RDC_WDT_INTERVAL);
else {
/* ticks doesn't matter anyway */
complete(&rdc321x_wdt_device.stop);
}
}
static void rdc321x_wdt_reset(void)
{
ticks = rdc321x_wdt_device.default_ticks;
}
static void rdc321x_wdt_start(void)
{
unsigned long flags;
if (!rdc321x_wdt_device.queue) {
rdc321x_wdt_device.queue = 1;
/* Clear the timer */
spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
outl(RDC_CLS_TMR, RDC3210_CFGREG_ADDR);
/* Enable watchdog and set the timeout to 81.92 us */
outl(RDC_WDT_EN | RDC_WDT_CNT, RDC3210_CFGREG_DATA);
spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
mod_timer(&rdc321x_wdt_device.timer,
jiffies + RDC_WDT_INTERVAL);
}
/* if process dies, counter is not decremented */
rdc321x_wdt_device.running++;
}
static int rdc321x_wdt_stop(void)
{
if (rdc321x_wdt_device.running)
rdc321x_wdt_device.running = 0;
ticks = rdc321x_wdt_device.default_ticks;
return -EIO;
}
/* filesystem operations */
static int rdc321x_wdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(0, &rdc321x_wdt_device.inuse))
return -EBUSY;
return nonseekable_open(inode, file);
}
static int rdc321x_wdt_release(struct inode *inode, struct file *file)
{
clear_bit(0, &rdc321x_wdt_device.inuse);
return 0;
}
static int rdc321x_wdt_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
unsigned int value;
static struct watchdog_info ident = {
.options = WDIOF_CARDRESET,
.identity = "RDC321x WDT",
};
unsigned long flags;
switch (cmd) {
case WDIOC_KEEPALIVE:
rdc321x_wdt_reset();
break;
case WDIOC_GETSTATUS:
/* Read the value from the DATA register */
spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
value = inl(RDC3210_CFGREG_DATA);
spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
if (copy_to_user(argp, &value, sizeof(int)))
return -EFAULT;
break;
case WDIOC_GETSUPPORT:
if (copy_to_user(argp, &ident, sizeof(ident)))
return -EFAULT;
break;
case WDIOC_SETOPTIONS:
if (copy_from_user(&value, argp, sizeof(int)))
return -EFAULT;
switch (value) {
case WDIOS_ENABLECARD:
rdc321x_wdt_start();
break;
case WDIOS_DISABLECARD:
return rdc321x_wdt_stop();
default:
return -EINVAL;
}
break;
default:
return -ENOTTY;
}
return 0;
}
static ssize_t rdc321x_wdt_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
if (!count)
return -EIO;
rdc321x_wdt_reset();
return count;
}
static const struct file_operations rdc321x_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.ioctl = rdc321x_wdt_ioctl,
.open = rdc321x_wdt_open,
.write = rdc321x_wdt_write,
.release = rdc321x_wdt_release,
};
static struct miscdevice rdc321x_wdt_misc = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &rdc321x_wdt_fops,
};
static int __devinit rdc321x_wdt_probe(struct platform_device *pdev)
{
int err;
err = misc_register(&rdc321x_wdt_misc);
if (err < 0) {
printk(KERN_ERR PFX "watchdog misc_register failed\n");
return err;
}
spin_lock_init(&rdc321x_wdt_device.lock);
/* Reset the watchdog */
outl(RDC_WDT_RST, RDC3210_CFGREG_DATA);
init_completion(&rdc321x_wdt_device.stop);
rdc321x_wdt_device.queue = 0;
clear_bit(0, &rdc321x_wdt_device.inuse);
setup_timer(&rdc321x_wdt_device.timer, rdc321x_wdt_trigger, 0);
rdc321x_wdt_device.default_ticks = ticks;
printk(KERN_INFO PFX "watchdog init success\n");
return 0;
}
static int rdc321x_wdt_remove(struct platform_device *pdev)
{
if (rdc321x_wdt_device.queue) {
rdc321x_wdt_device.queue = 0;
wait_for_completion(&rdc321x_wdt_device.stop);
}
misc_deregister(&rdc321x_wdt_misc);
return 0;
}
static struct platform_driver rdc321x_wdt_driver = {
.probe = rdc321x_wdt_probe,
.remove = rdc321x_wdt_remove,
.driver = {
.owner = THIS_MODULE,
.name = "rdc321x-wdt",
},
};
static int __init rdc321x_wdt_init(void)
{
return platform_driver_register(&rdc321x_wdt_driver);
}
static void __exit rdc321x_wdt_exit(void)
{
platform_driver_unregister(&rdc321x_wdt_driver);
}
module_init(rdc321x_wdt_init);
module_exit(rdc321x_wdt_exit);
MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
MODULE_DESCRIPTION("RDC321x watchdog driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);

16
drivers/watchdog/s3c2410_wdt.c
View file

@ -21,18 +21,6 @@
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Changelog:
* 05-Oct-2004 BJD Added semaphore init to stop crashes on open
* Fixed tmr_count / wdt_count confusion
* Added configurable debug
*
* 11-Jan-2005 BJD Fixed divide-by-2 in timeout code
*
* 25-Jan-2005 DA Added suspend/resume support
* Replaced reboot notifier with .shutdown method
*
* 10-Mar-2005 LCVR Changed S3C2410_VA to S3C24XX_VA
*/
#include <linux/module.h>
@ -365,7 +353,7 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
return -ENOENT;
}
size = (res->end-res->start)+1;
size = (res->end - res->start) + 1;
wdt_mem = request_mem_region(res->start, size, pdev->name);
if (wdt_mem == NULL) {
dev_err(dev, "failed to get memory region\n");
@ -374,7 +362,7 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
}
wdt_base = ioremap(res->start, size);
if (wdt_base == 0) {
if (wdt_base == NULL) {
dev_err(dev, "failed to ioremap() region\n");
ret = -EINVAL;
goto err_req;