diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/watchdog/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/watchdog/Makefile | 1 | ||||
| -rw-r--r-- | drivers/watchdog/alim1535_wdt.c | 20 | ||||
| -rw-r--r-- | drivers/watchdog/alim7101_wdt.c | 18 | ||||
| -rw-r--r-- | drivers/watchdog/ar7_wdt.c | 2 | ||||
| -rw-r--r-- | drivers/watchdog/bfin_wdt.c | 2 | ||||
| -rw-r--r-- | drivers/watchdog/it8712f_wdt.c | 2 | ||||
| -rw-r--r-- | drivers/watchdog/mpc5200_wdt.c | 2 | ||||
| -rw-r--r-- | drivers/watchdog/mtx-1_wdt.c | 2 | ||||
| -rw-r--r-- | drivers/watchdog/sbc60xxwdt.c | 18 | ||||
| -rw-r--r-- | drivers/watchdog/scx200_wdt.c | 10 | ||||
| -rw-r--r-- | drivers/watchdog/txx9wdt.c | 276 | ||||
| -rw-r--r-- | drivers/watchdog/w83877f_wdt.c | 18 | ||||
| -rw-r--r-- | drivers/watchdog/w83977f_wdt.c | 18 | ||||
| -rw-r--r-- | drivers/watchdog/wdt.c | 30 | ||||
| -rw-r--r-- | drivers/watchdog/wdt977.c | 18 |
16 files changed, 375 insertions, 68 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index fbd61127b9d9..899fc13d0612 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -639,6 +639,12 @@ config AR7_WDT help Hardware driver for the TI AR7 Watchdog Timer. +config TXX9_WDT + tristate "Toshiba TXx9 Watchdog Timer" + depends on CPU_TX39XX || CPU_TX49XX + help + Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs. + # PARISC Architecture # POWERPC Architecture diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index 87483cc63252..ebc21146d40c 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -93,6 +93,7 @@ obj-$(CONFIG_INDYDOG) += indydog.o obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o obj-$(CONFIG_AR7_WDT) += ar7_wdt.o +obj-$(CONFIG_TXX9_WDT) += txx9wdt.o # PARISC Architecture diff --git a/drivers/watchdog/alim1535_wdt.c b/drivers/watchdog/alim1535_wdt.c index b481cc0e32e4..2b1fbdb2fcf7 100644 --- a/drivers/watchdog/alim1535_wdt.c +++ b/drivers/watchdog/alim1535_wdt.c @@ -413,18 +413,18 @@ static int __init watchdog_init(void) /* Calculate the watchdog's timeout */ ali_settimer(timeout); - ret = misc_register(&ali_miscdev); + ret = register_reboot_notifier(&ali_notifier); if (ret != 0) { - printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - WATCHDOG_MINOR, ret); + printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", + ret); goto out; } - ret = register_reboot_notifier(&ali_notifier); + ret = misc_register(&ali_miscdev); if (ret != 0) { - printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", - ret); - goto unreg_miscdev; + printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", + WATCHDOG_MINOR, ret); + goto unreg_reboot; } printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n", @@ -432,8 +432,8 @@ static int __init watchdog_init(void) out: return ret; -unreg_miscdev: - misc_deregister(&ali_miscdev); +unreg_reboot: + unregister_reboot_notifier(&ali_notifier); goto out; } @@ -449,8 +449,8 @@ static void __exit watchdog_exit(void) ali_stop(); /* Deregister */ - unregister_reboot_notifier(&ali_notifier); misc_deregister(&ali_miscdev); + unregister_reboot_notifier(&ali_notifier); pci_dev_put(ali_pci); } diff --git a/drivers/watchdog/alim7101_wdt.c b/drivers/watchdog/alim7101_wdt.c index 67aed9f8c362..238273c98656 100644 --- a/drivers/watchdog/alim7101_wdt.c +++ b/drivers/watchdog/alim7101_wdt.c @@ -377,18 +377,18 @@ static int __init alim7101_wdt_init(void) timeout); } - rc = misc_register(&wdt_miscdev); + rc = register_reboot_notifier(&wdt_notifier); if (rc) { - printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - wdt_miscdev.minor, rc); + printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", + rc); goto err_out; } - rc = register_reboot_notifier(&wdt_notifier); + rc = misc_register(&wdt_miscdev); if (rc) { - printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", - rc); - goto err_out_miscdev; + printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", + wdt_miscdev.minor, rc); + goto err_out_reboot; } if (nowayout) { @@ -399,8 +399,8 @@ static int __init alim7101_wdt_init(void) timeout, nowayout); return 0; -err_out_miscdev: - misc_deregister(&wdt_miscdev); +err_out_reboot: + unregister_reboot_notifier(&wdt_notifier); err_out: pci_dev_put(alim7101_pmu); return rc; diff --git a/drivers/watchdog/ar7_wdt.c b/drivers/watchdog/ar7_wdt.c index cdaab8c3d3d0..2eb48c0df32c 100644 --- a/drivers/watchdog/ar7_wdt.c +++ b/drivers/watchdog/ar7_wdt.c @@ -279,7 +279,7 @@ static int ar7_wdt_ioctl(struct inode *inode, struct file *file, } } -static struct file_operations ar7_wdt_fops = { +static const struct file_operations ar7_wdt_fops = { .owner = THIS_MODULE, .write = ar7_wdt_write, .ioctl = ar7_wdt_ioctl, diff --git a/drivers/watchdog/bfin_wdt.c b/drivers/watchdog/bfin_wdt.c index 31dc7a69e90c..472be10f0686 100644 --- a/drivers/watchdog/bfin_wdt.c +++ b/drivers/watchdog/bfin_wdt.c @@ -390,7 +390,7 @@ static struct platform_driver bfin_wdt_driver = { .resume = bfin_wdt_resume, }; -static struct file_operations bfin_wdt_fops = { +static const struct file_operations bfin_wdt_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .write = bfin_wdt_write, diff --git a/drivers/watchdog/it8712f_wdt.c b/drivers/watchdog/it8712f_wdt.c index 6330fc02464e..1b6d7d1b715d 100644 --- a/drivers/watchdog/it8712f_wdt.c +++ b/drivers/watchdog/it8712f_wdt.c @@ -296,7 +296,7 @@ it8712f_wdt_release(struct inode *inode, struct file *file) return 0; } -static struct file_operations it8712f_wdt_fops = { +static const struct file_operations it8712f_wdt_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .write = it8712f_wdt_write, diff --git a/drivers/watchdog/mpc5200_wdt.c b/drivers/watchdog/mpc5200_wdt.c index 11f6a111e75b..80a91d4cea11 100644 --- a/drivers/watchdog/mpc5200_wdt.c +++ b/drivers/watchdog/mpc5200_wdt.c @@ -158,7 +158,7 @@ static int mpc5200_wdt_release(struct inode *inode, struct file *file) return 0; } -static struct file_operations mpc5200_wdt_fops = { +static const struct file_operations mpc5200_wdt_fops = { .owner = THIS_MODULE, .write = mpc5200_wdt_write, .ioctl = mpc5200_wdt_ioctl, diff --git a/drivers/watchdog/mtx-1_wdt.c b/drivers/watchdog/mtx-1_wdt.c index dcfd401a7ad7..98451747d3cd 100644 --- a/drivers/watchdog/mtx-1_wdt.c +++ b/drivers/watchdog/mtx-1_wdt.c @@ -180,7 +180,7 @@ static ssize_t mtx1_wdt_write(struct file *file, const char *buf, size_t count, return count; } -static struct file_operations mtx1_wdt_fops = { +static const struct file_operations mtx1_wdt_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .ioctl = mtx1_wdt_ioctl, diff --git a/drivers/watchdog/sbc60xxwdt.c b/drivers/watchdog/sbc60xxwdt.c index e4f3cb6090bc..ef76f01625e7 100644 --- a/drivers/watchdog/sbc60xxwdt.c +++ b/drivers/watchdog/sbc60xxwdt.c @@ -359,20 +359,20 @@ static int __init sbc60xxwdt_init(void) } } - rc = misc_register(&wdt_miscdev); + rc = register_reboot_notifier(&wdt_notifier); if (rc) { - printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - wdt_miscdev.minor, rc); + printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", + rc); goto err_out_region2; } - rc = register_reboot_notifier(&wdt_notifier); + rc = misc_register(&wdt_miscdev); if (rc) { - printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", - rc); - goto err_out_miscdev; + printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", + wdt_miscdev.minor, rc); + goto err_out_reboot; } printk(KERN_INFO PFX "WDT driver for 60XX single board computer initialised. timeout=%d sec (nowayout=%d)\n", @@ -380,8 +380,8 @@ static int __init sbc60xxwdt_init(void) return 0; -err_out_miscdev: - misc_deregister(&wdt_miscdev); +err_out_reboot: + unregister_reboot_notifier(&wdt_notifier); err_out_region2: if ((wdt_stop != 0x45) && (wdt_stop != wdt_start)) release_region(wdt_stop,1); diff --git a/drivers/watchdog/scx200_wdt.c b/drivers/watchdog/scx200_wdt.c index d4fd0fa2f176..d55882bca319 100644 --- a/drivers/watchdog/scx200_wdt.c +++ b/drivers/watchdog/scx200_wdt.c @@ -231,17 +231,17 @@ static int __init scx200_wdt_init(void) sema_init(&open_semaphore, 1); - r = misc_register(&scx200_wdt_miscdev); + r = register_reboot_notifier(&scx200_wdt_notifier); if (r) { + printk(KERN_ERR NAME ": unable to register reboot notifier"); release_region(scx200_cb_base + SCx200_WDT_OFFSET, SCx200_WDT_SIZE); return r; } - r = register_reboot_notifier(&scx200_wdt_notifier); + r = misc_register(&scx200_wdt_miscdev); if (r) { - printk(KERN_ERR NAME ": unable to register reboot notifier"); - misc_deregister(&scx200_wdt_miscdev); + unregister_reboot_notifier(&scx200_wdt_notifier); release_region(scx200_cb_base + SCx200_WDT_OFFSET, SCx200_WDT_SIZE); return r; @@ -252,8 +252,8 @@ static int __init scx200_wdt_init(void) static void __exit scx200_wdt_cleanup(void) { - unregister_reboot_notifier(&scx200_wdt_notifier); misc_deregister(&scx200_wdt_miscdev); + unregister_reboot_notifier(&scx200_wdt_notifier); release_region(scx200_cb_base + SCx200_WDT_OFFSET, SCx200_WDT_SIZE); } diff --git a/drivers/watchdog/txx9wdt.c b/drivers/watchdog/txx9wdt.c new file mode 100644 index 000000000000..328b3c7211ef --- /dev/null +++ b/drivers/watchdog/txx9wdt.c @@ -0,0 +1,276 @@ +/* + * txx9wdt: A Hardware Watchdog Driver for TXx9 SoCs + * + * Copyright (C) 2007 Atsushi Nemoto <anemo@mba.ocn.ne.jp> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/types.h> +#include <linux/miscdevice.h> +#include <linux/watchdog.h> +#include <linux/fs.h> +#include <linux/reboot.h> +#include <linux/init.h> +#include <linux/uaccess.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/io.h> +#include <asm/txx9tmr.h> + +#define TIMER_MARGIN 60 /* Default is 60 seconds */ + +static int timeout = TIMER_MARGIN; /* in seconds */ +module_param(timeout, int, 0); +MODULE_PARM_DESC(timeout, + "Watchdog timeout in seconds. " + "(0<timeout<((2^" __MODULE_STRING(TXX9_TIMER_BITS) ")/(IMCLK/256)), " + "default=" __MODULE_STRING(TIMER_MARGIN) ")"); + +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) ")"); + +#define WD_TIMER_CCD 7 /* 1/256 */ +#define WD_TIMER_CLK (clk_get_rate(txx9_imclk) / (2 << WD_TIMER_CCD)) +#define WD_MAX_TIMEOUT ((0xffffffff >> (32 - TXX9_TIMER_BITS)) / WD_TIMER_CLK) + +static unsigned long txx9wdt_alive; +static int expect_close; +static struct txx9_tmr_reg __iomem *txx9wdt_reg; +static struct clk *txx9_imclk; + +static void txx9wdt_ping(void) +{ + __raw_writel(TXx9_TMWTMR_TWIE | TXx9_TMWTMR_TWC, &txx9wdt_reg->wtmr); +} + +static void txx9wdt_start(void) +{ + __raw_writel(WD_TIMER_CLK * timeout, &txx9wdt_reg->cpra); + __raw_writel(WD_TIMER_CCD, &txx9wdt_reg->ccdr); + __raw_writel(0, &txx9wdt_reg->tisr); /* clear pending interrupt */ + __raw_writel(TXx9_TMTCR_TCE | TXx9_TMTCR_CCDE | TXx9_TMTCR_TMODE_WDOG, + &txx9wdt_reg->tcr); + __raw_writel(TXx9_TMWTMR_TWIE | TXx9_TMWTMR_TWC, &txx9wdt_reg->wtmr); +} + +static void txx9wdt_stop(void) +{ + __raw_writel(TXx9_TMWTMR_WDIS, &txx9wdt_reg->wtmr); + __raw_writel(__raw_readl(&txx9wdt_reg->tcr) & ~TXx9_TMTCR_TCE, + &txx9wdt_reg->tcr); +} + +static int txx9wdt_open(struct inode *inode, struct file *file) +{ + if (test_and_set_bit(0, &txx9wdt_alive)) + return -EBUSY; + + if (__raw_readl(&txx9wdt_reg->tcr) & TXx9_TMTCR_TCE) { + clear_bit(0, &txx9wdt_alive); + return -EBUSY; + } + + if (nowayout) + __module_get(THIS_MODULE); + + txx9wdt_start(); + return nonseekable_open(inode, file); +} + +static int txx9wdt_release(struct inode *inode, struct file *file) +{ + if (expect_close) + txx9wdt_stop(); + else { + printk(KERN_CRIT "txx9wdt: " + "Unexpected close, not stopping watchdog!\n"); + txx9wdt_ping(); + } + clear_bit(0, &txx9wdt_alive); + expect_close = 0; + return 0; +} + +static ssize_t txx9wdt_write(struct file *file, const char __user *data, + size_t len, loff_t *ppos) +{ + if (len) { + if (!nowayout) { + size_t i; + + 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; + } + } + txx9wdt_ping(); + } + return len; +} + +static int txx9wdt_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + void __user *argp = (void __user *)arg; + int __user *p = argp; + int new_timeout; + static struct watchdog_info ident = { + .options = WDIOF_SETTIMEOUT | + WDIOF_KEEPALIVEPING | + WDIOF_MAGICCLOSE, + .firmware_version = 0, + .identity = "Hardware Watchdog for TXx9", + }; + + switch (cmd) { + default: + return -ENOTTY; + case WDIOC_GETSUPPORT: + return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0; + case WDIOC_GETSTATUS: + case WDIOC_GETBOOTSTATUS: + return put_user(0, p); + case WDIOC_KEEPALIVE: + txx9wdt_ping(); + return 0; + case WDIOC_SETTIMEOUT: + if (get_user(new_timeout, p)) + return -EFAULT; + if (new_timeout < 1 || new_timeout > WD_MAX_TIMEOUT) + return -EINVAL; + timeout = new_timeout; + txx9wdt_stop(); + txx9wdt_start(); + /* Fall */ + case WDIOC_GETTIMEOUT: + return put_user(timeout, p); + } +} + +static int txx9wdt_notify_sys(struct notifier_block *this, unsigned long code, + void *unused) +{ + if (code == SYS_DOWN || code == SYS_HALT) + txx9wdt_stop(); + return NOTIFY_DONE; +} + +static const struct file_operations txx9wdt_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .write = txx9wdt_write, + .ioctl = txx9wdt_ioctl, + .open = txx9wdt_open, + .release = txx9wdt_release, +}; + +static struct miscdevice txx9wdt_miscdev = { + .minor = WATCHDOG_MINOR, + .name = "watchdog", + .fops = &txx9wdt_fops, +}; + +static struct notifier_block txx9wdt_notifier = { + .notifier_call = txx9wdt_notify_sys +}; + +static int __init txx9wdt_probe(struct platform_device *dev) +{ + struct resource *res; + int ret; + + txx9_imclk = clk_get(NULL, "imbus_clk"); + if (IS_ERR(txx9_imclk)) { + ret = PTR_ERR(txx9_imclk); + txx9_imclk = NULL; + goto exit; + } + ret = clk_enable(txx9_imclk); + if (ret) { + clk_put(txx9_imclk); + txx9_imclk = NULL; + goto exit; + } + + res = platform_get_resource(dev, IORESOURCE_MEM, 0); + if (!res) + goto exit_busy; + if (!devm_request_mem_region(&dev->dev, + res->start, res->end - res->start + 1, + "txx9wdt")) + goto exit_busy; + txx9wdt_reg = devm_ioremap(&dev->dev, + res->start, res->end - res->start + 1); + if (!txx9wdt_reg) + goto exit_busy; + + ret = register_reboot_notifier(&txx9wdt_notifier); + if (ret) + goto exit; + + ret = misc_register(&txx9wdt_miscdev); + if (ret) { + unregister_reboot_notifier(&txx9wdt_notifier); + goto exit; + } + + printk(KERN_INFO "Hardware Watchdog Timer for TXx9: " + "timeout=%d sec (max %ld) (nowayout= %d)\n", + timeout, WD_MAX_TIMEOUT, nowayout); + + return 0; +exit_busy: + ret = -EBUSY; +exit: + if (txx9_imclk) { + clk_disable(txx9_imclk); + clk_put(txx9_imclk); + } + return ret; +} + +static int __exit txx9wdt_remove(struct platform_device *dev) +{ + misc_deregister(&txx9wdt_miscdev); + unregister_reboot_notifier(&txx9wdt_notifier); + clk_disable(txx9_imclk); + clk_put(txx9_imclk); + return 0; +} + +static struct platform_driver txx9wdt_driver = { + .remove = __exit_p(txx9wdt_remove), + .driver = { + .name = "txx9wdt", + .owner = THIS_MODULE, + }, +}; + +static int __init watchdog_init(void) +{ + return platform_driver_probe(&txx9wdt_driver, txx9wdt_probe); +} + +static void __exit watchdog_exit(void) +{ + platform_driver_unregister(&txx9wdt_driver); +} + +module_init(watchdog_init); +module_exit(watchdog_exit); + +MODULE_DESCRIPTION("TXx9 Watchdog Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); diff --git a/drivers/watchdog/w83877f_wdt.c b/drivers/watchdog/w83877f_wdt.c index bcc9d48955de..f510a3a595e6 100644 --- a/drivers/watchdog/w83877f_wdt.c +++ b/drivers/watchdog/w83877f_wdt.c @@ -373,20 +373,20 @@ static int __init w83877f_wdt_init(void) goto err_out_region1; } - rc = misc_register(&wdt_miscdev); + rc = register_reboot_notifier(&wdt_notifier); if (rc) { - printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - wdt_miscdev.minor, rc); + printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", + rc); goto err_out_region2; } - rc = register_reboot_notifier(&wdt_notifier); + rc = misc_register(&wdt_miscdev); if (rc) { - printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", - rc); - goto err_out_miscdev; + printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", + wdt_miscdev.minor, rc); + goto err_out_reboot; } printk(KERN_INFO PFX "WDT driver for W83877F initialised. timeout=%d sec (nowayout=%d)\n", @@ -394,8 +394,8 @@ static int __init w83877f_wdt_init(void) return 0; -err_out_miscdev: - misc_deregister(&wdt_miscdev); +err_out_reboot: + unregister_reboot_notifier(&wdt_notifier); err_out_region2: release_region(WDT_PING,1); err_out_region1: diff --git a/drivers/watchdog/w83977f_wdt.c b/drivers/watchdog/w83977f_wdt.c index b475529d2475..b209bcd7f789 100644 --- a/drivers/watchdog/w83977f_wdt.c +++ b/drivers/watchdog/w83977f_wdt.c @@ -494,20 +494,20 @@ static int __init w83977f_wdt_init(void) goto err_out; } - rc = misc_register(&wdt_miscdev); + rc = register_reboot_notifier(&wdt_notifier); if (rc) { - printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - wdt_miscdev.minor, rc); + printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", + rc); goto err_out_region; } - rc = register_reboot_notifier(&wdt_notifier); + rc = misc_register(&wdt_miscdev); if (rc) { - printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", - rc); - goto err_out_miscdev; + printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", + wdt_miscdev.minor, rc); + goto err_out_reboot; } printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d testmode=%d)\n", @@ -515,8 +515,8 @@ static int __init w83977f_wdt_init(void) return 0; -err_out_miscdev: - misc_deregister(&wdt_miscdev); +err_out_reboot: + unregister_reboot_notifier(&wdt_notifier); err_out_region: release_region(IO_INDEX_PORT,2); err_out: diff --git a/drivers/watchdog/wdt.c b/drivers/watchdog/wdt.c index 53d0bb410df8..756fb15fdce7 100644 --- a/drivers/watchdog/wdt.c +++ b/drivers/watchdog/wdt.c @@ -70,6 +70,8 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" _ static int io=0x240; static int irq=11; +static DEFINE_SPINLOCK(wdt_lock); + module_param(io, int, 0); MODULE_PARM_DESC(io, "WDT io port (default=0x240)"); module_param(irq, int, 0); @@ -109,6 +111,8 @@ static void wdt_ctr_load(int ctr, int val) static int wdt_start(void) { + unsigned long flags; + spin_lock_irqsave(&wdt_lock, flags); inb_p(WDT_DC); /* Disable watchdog */ wdt_ctr_mode(0,3); /* Program CTR0 for Mode 3: Square Wave Generator */ wdt_ctr_mode(1,2); /* Program CTR1 for Mode 2: Rate Generator */ @@ -117,6 +121,7 @@ static int wdt_start(void) wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */ wdt_ctr_load(2,65535); /* Length of reset pulse */ outb_p(0, WDT_DC); /* Enable watchdog */ + spin_unlock_irqrestore(&wdt_lock, flags); return 0; } @@ -128,9 +133,12 @@ static int wdt_start(void) static int wdt_stop (void) { + unsigned long flags; + spin_lock_irqsave(&wdt_lock, flags); /* Turn the card off */ inb_p(WDT_DC); /* Disable watchdog */ wdt_ctr_load(2,0); /* 0 length reset pulses now */ + spin_unlock_irqrestore(&wdt_lock, flags); return 0; } @@ -143,11 +151,14 @@ static int wdt_stop (void) static int wdt_ping(void) { + unsigned long flags; + spin_lock_irqsave(&wdt_lock, flags); /* Write a watchdog value */ inb_p(WDT_DC); /* Disable watchdog */ wdt_ctr_mode(1,2); /* Re-Program CTR1 for Mode 2: Rate Generator */ wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */ outb_p(0, WDT_DC); /* Enable watchdog */ + spin_unlock_irqrestore(&wdt_lock, flags); return 0; } @@ -182,7 +193,12 @@ static int wdt_set_heartbeat(int t) static int wdt_get_status(int *status) { - unsigned char new_status=inb_p(WDT_SR); + unsigned char new_status; + unsigned long flags; + + spin_lock_irqsave(&wdt_lock, flags); + new_status = inb_p(WDT_SR); + spin_unlock_irqrestore(&wdt_lock, flags); *status=0; if (new_status & WDC_SR_ISOI0) @@ -214,8 +230,12 @@ static int wdt_get_status(int *status) static int wdt_get_temperature(int *temperature) { - unsigned short c=inb_p(WDT_RT); + unsigned short c; + unsigned long flags; + spin_lock_irqsave(&wdt_lock, flags); + c = inb_p(WDT_RT); + spin_unlock_irqrestore(&wdt_lock, flags); *temperature = (c * 11 / 15) + 7; return 0; } @@ -237,7 +257,10 @@ static irqreturn_t wdt_interrupt(int irq, void *dev_id) * Read the status register see what is up and * then printk it. */ - unsigned char status=inb_p(WDT_SR); + unsigned char status; + + spin_lock(&wdt_lock); + status = inb_p(WDT_SR); printk(KERN_CRIT "WDT status %d\n", status); @@ -265,6 +288,7 @@ static irqreturn_t wdt_interrupt(int irq, void *dev_id) printk(KERN_CRIT "Reset in 5ms.\n"); #endif } + spin_unlock(&wdt_lock); return IRQ_HANDLED; } diff --git a/drivers/watchdog/wdt977.c b/drivers/watchdog/wdt977.c index 9b7f6b6edef6..fb4b876c9fda 100644 --- a/drivers/watchdog/wdt977.c +++ b/drivers/watchdog/wdt977.c @@ -470,20 +470,20 @@ static int __init wd977_init(void) } } - rc = misc_register(&wdt977_miscdev); + rc = register_reboot_notifier(&wdt977_notifier); if (rc) { - printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - wdt977_miscdev.minor, rc); + printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", + rc); goto err_out_region; } - rc = register_reboot_notifier(&wdt977_notifier); + rc = misc_register(&wdt977_miscdev); if (rc) { - printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", - rc); - goto err_out_miscdev; + printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", + wdt977_miscdev.minor, rc); + goto err_out_reboot; } printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d, testmode=%i)\n", @@ -491,8 +491,8 @@ static int __init wd977_init(void) return 0; -err_out_miscdev: - misc_deregister(&wdt977_miscdev); +err_out_reboot: + unregister_reboot_notifier(&wdt977_notifier); err_out_region: if (!machine_is_netwinder()) release_region(IO_INDEX_PORT,2); |