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-rw-r--r--drivers/watchdog/Kconfig23
-rw-r--r--drivers/watchdog/Makefile1
-rw-r--r--drivers/watchdog/bcm63xx_wdt.c350
-rw-r--r--drivers/watchdog/f71808e_wdt.c10
-rw-r--r--drivers/watchdog/iTCO_wdt.c26
-rw-r--r--drivers/watchdog/it8712f_wdt.c25
-rw-r--r--drivers/watchdog/it87_wdt.c96
-rw-r--r--drivers/watchdog/machzwd.c4
8 files changed, 479 insertions, 56 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index c356146bd71..4a291045eba 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -409,11 +409,11 @@ config ALIM7101_WDT
Most people will say N.
config F71808E_WDT
- tristate "Fintek F71808E and F71882FG Watchdog"
+ tristate "Fintek F71808E, F71882FG and F71889FG Watchdog"
depends on X86 && EXPERIMENTAL
help
This is the driver for the hardware watchdog on the Fintek
- F71808E and F71882FG Super I/O controllers.
+ F71808E, F71882FG and F71889FG Super I/O controllers.
You can compile this driver directly into the kernel, or use
it as a module. The module will be called f71808e_wdt.
@@ -565,10 +565,11 @@ config IT87_WDT
tristate "IT87 Watchdog Timer"
depends on X86 && EXPERIMENTAL
---help---
- This is the driver for the hardware watchdog on the ITE IT8716,
- IT8718, IT8726, IT8712(Version J,K) Super I/O chips. This watchdog
- simply watches your kernel to make sure it doesn't freeze, and if
- it does, it reboots your computer after a certain amount of time.
+ This is the driver for the hardware watchdog on the ITE IT8702,
+ IT8712, IT8716, IT8718, IT8720, IT8726, IT8712 Super I/O chips.
+ This watchdog simply watches your kernel to make sure it doesn't
+ freeze, and if it does, it reboots your computer after a certain
+ amount of time.
To compile this driver as a module, choose M here: the module will
be called it87_wdt.
@@ -916,6 +917,16 @@ config OCTEON_WDT
from the first interrupt, it is then only poked when the
device is written.
+config BCM63XX_WDT
+ tristate "Broadcom BCM63xx hardware watchdog"
+ depends on BCM63XX
+ help
+ Watchdog driver for the built in watchdog hardware in Broadcom
+ BCM63xx SoC.
+
+ To compile this driver as a loadable module, choose M here.
+ The module will be called bcm63xx_wdt.
+
# PARISC Architecture
# POWERPC Architecture
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 8374503fcc6..4b0ef386229 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -109,6 +109,7 @@ obj-$(CONFIG_SBC_EPX_C3_WATCHDOG) += sbc_epx_c3.o
# MIPS Architecture
obj-$(CONFIG_BCM47XX_WDT) += bcm47xx_wdt.o
+obj-$(CONFIG_BCM63XX_WDT) += bcm63xx_wdt.o
obj-$(CONFIG_RC32434_WDT) += rc32434_wdt.o
obj-$(CONFIG_INDYDOG) += indydog.o
obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o
diff --git a/drivers/watchdog/bcm63xx_wdt.c b/drivers/watchdog/bcm63xx_wdt.c
new file mode 100644
index 00000000000..a1debc89356
--- /dev/null
+++ b/drivers/watchdog/bcm63xx_wdt.c
@@ -0,0 +1,350 @@
+/*
+ * Broadcom BCM63xx SoC watchdog driver
+ *
+ * Copyright (C) 2007, Miguel Gaio <miguel.gaio@efixo.com>
+ * Copyright (C) 2008, Florian Fainelli <florian@openwrt.org>
+ *
+ * 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/bitops.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/reboot.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+#include <linux/watchdog.h>
+#include <linux/timer.h>
+#include <linux/jiffies.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/resource.h>
+#include <linux/platform_device.h>
+
+#include <bcm63xx_cpu.h>
+#include <bcm63xx_io.h>
+#include <bcm63xx_regs.h>
+#include <bcm63xx_timer.h>
+
+#define PFX KBUILD_MODNAME
+
+#define WDT_HZ 50000000 /* Fclk */
+#define WDT_DEFAULT_TIME 30 /* seconds */
+#define WDT_MAX_TIME 256 /* seconds */
+
+static struct {
+ void __iomem *regs;
+ struct timer_list timer;
+ int default_ticks;
+ unsigned long inuse;
+ atomic_t ticks;
+} bcm63xx_wdt_device;
+
+static int expect_close;
+
+static int wdt_time = WDT_DEFAULT_TIME;
+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) ")");
+
+/* HW functions */
+static void bcm63xx_wdt_hw_start(void)
+{
+ bcm_writel(0xfffffffe, bcm63xx_wdt_device.regs + WDT_DEFVAL_REG);
+ bcm_writel(WDT_START_1, bcm63xx_wdt_device.regs + WDT_CTL_REG);
+ bcm_writel(WDT_START_2, bcm63xx_wdt_device.regs + WDT_CTL_REG);
+}
+
+static void bcm63xx_wdt_hw_stop(void)
+{
+ bcm_writel(WDT_STOP_1, bcm63xx_wdt_device.regs + WDT_CTL_REG);
+ bcm_writel(WDT_STOP_2, bcm63xx_wdt_device.regs + WDT_CTL_REG);
+}
+
+static void bcm63xx_wdt_isr(void *data)
+{
+ struct pt_regs *regs = get_irq_regs();
+
+ die(PFX " fire", regs);
+}
+
+static void bcm63xx_timer_tick(unsigned long unused)
+{
+ if (!atomic_dec_and_test(&bcm63xx_wdt_device.ticks)) {
+ bcm63xx_wdt_hw_start();
+ mod_timer(&bcm63xx_wdt_device.timer, jiffies + HZ);
+ } else
+ printk(KERN_CRIT PFX ": watchdog will restart system\n");
+}
+
+static void bcm63xx_wdt_pet(void)
+{
+ atomic_set(&bcm63xx_wdt_device.ticks, wdt_time);
+}
+
+static void bcm63xx_wdt_start(void)
+{
+ bcm63xx_wdt_pet();
+ bcm63xx_timer_tick(0);
+}
+
+static void bcm63xx_wdt_pause(void)
+{
+ del_timer_sync(&bcm63xx_wdt_device.timer);
+ bcm63xx_wdt_hw_stop();
+}
+
+static int bcm63xx_wdt_settimeout(int new_time)
+{
+ if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
+ return -EINVAL;
+
+ wdt_time = new_time;
+
+ return 0;
+}
+
+static int bcm63xx_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &bcm63xx_wdt_device.inuse))
+ return -EBUSY;
+
+ bcm63xx_wdt_start();
+ return nonseekable_open(inode, file);
+}
+
+static int bcm63xx_wdt_release(struct inode *inode, struct file *file)
+{
+ if (expect_close == 42)
+ bcm63xx_wdt_pause();
+ else {
+ printk(KERN_CRIT PFX
+ ": Unexpected close, not stopping watchdog!\n");
+ bcm63xx_wdt_start();
+ }
+ clear_bit(0, &bcm63xx_wdt_device.inuse);
+ expect_close = 0;
+ return 0;
+}
+
+static ssize_t bcm63xx_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 = 42;
+ }
+ }
+ bcm63xx_wdt_pet();
+ }
+ return len;
+}
+
+static struct watchdog_info bcm63xx_wdt_info = {
+ .identity = PFX,
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+};
+
+
+static long bcm63xx_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ int new_value, retval = -EINVAL;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &bcm63xx_wdt_info,
+ sizeof(bcm63xx_wdt_info)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_SETOPTIONS:
+ if (get_user(new_value, p))
+ return -EFAULT;
+
+ if (new_value & WDIOS_DISABLECARD) {
+ bcm63xx_wdt_pause();
+ retval = 0;
+ }
+ if (new_value & WDIOS_ENABLECARD) {
+ bcm63xx_wdt_start();
+ retval = 0;
+ }
+
+ return retval;
+
+ case WDIOC_KEEPALIVE:
+ bcm63xx_wdt_pet();
+ return 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_value, p))
+ return -EFAULT;
+
+ if (bcm63xx_wdt_settimeout(new_value))
+ return -EINVAL;
+
+ bcm63xx_wdt_pet();
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(wdt_time, p);
+
+ default:
+ return -ENOTTY;
+
+ }
+}
+
+static int bcm63xx_wdt_notify_sys(struct notifier_block *this,
+ unsigned long code, void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ bcm63xx_wdt_pause();
+ return NOTIFY_DONE;
+}
+
+static const struct file_operations bcm63xx_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = bcm63xx_wdt_write,
+ .unlocked_ioctl = bcm63xx_wdt_ioctl,
+ .open = bcm63xx_wdt_open,
+ .release = bcm63xx_wdt_release,
+};
+
+static struct miscdevice bcm63xx_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &bcm63xx_wdt_fops,
+};
+
+static struct notifier_block bcm63xx_wdt_notifier = {
+ .notifier_call = bcm63xx_wdt_notify_sys,
+};
+
+
+static int bcm63xx_wdt_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct resource *r;
+
+ setup_timer(&bcm63xx_wdt_device.timer, bcm63xx_timer_tick, 0L);
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!r) {
+ dev_err(&pdev->dev, "failed to get resources\n");
+ return -ENODEV;
+ }
+
+ bcm63xx_wdt_device.regs = ioremap_nocache(r->start, r->end - r->start);
+ if (!bcm63xx_wdt_device.regs) {
+ dev_err(&pdev->dev, "failed to remap I/O resources\n");
+ return -ENXIO;
+ }
+
+ ret = bcm63xx_timer_register(TIMER_WDT_ID, bcm63xx_wdt_isr, NULL);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to register wdt timer isr\n");
+ goto unmap;
+ }
+
+ if (bcm63xx_wdt_settimeout(wdt_time)) {
+ bcm63xx_wdt_settimeout(WDT_DEFAULT_TIME);
+ dev_info(&pdev->dev,
+ ": wdt_time value must be 1 <= wdt_time <= 256, using %d\n",
+ wdt_time);
+ }
+
+ ret = register_reboot_notifier(&bcm63xx_wdt_notifier);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register reboot_notifier\n");
+ goto unregister_timer;
+ }
+
+ ret = misc_register(&bcm63xx_wdt_miscdev);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to register watchdog device\n");
+ goto unregister_reboot_notifier;
+ }
+
+ dev_info(&pdev->dev, " started, timer margin: %d sec\n",
+ WDT_DEFAULT_TIME);
+
+ return 0;
+
+unregister_reboot_notifier:
+ unregister_reboot_notifier(&bcm63xx_wdt_notifier);
+unregister_timer:
+ bcm63xx_timer_unregister(TIMER_WDT_ID);
+unmap:
+ iounmap(bcm63xx_wdt_device.regs);
+ return ret;
+}
+
+static int bcm63xx_wdt_remove(struct platform_device *pdev)
+{
+ if (!nowayout)
+ bcm63xx_wdt_pause();
+
+ misc_deregister(&bcm63xx_wdt_miscdev);
+
+ iounmap(bcm63xx_wdt_device.regs);
+
+ unregister_reboot_notifier(&bcm63xx_wdt_notifier);
+ bcm63xx_timer_unregister(TIMER_WDT_ID);
+
+ return 0;
+}
+
+static struct platform_driver bcm63xx_wdt = {
+ .probe = bcm63xx_wdt_probe,
+ .remove = bcm63xx_wdt_remove,
+ .driver = {
+ .name = "bcm63xx-wdt",
+ }
+};
+
+static int __init bcm63xx_wdt_init(void)
+{
+ return platform_driver_register(&bcm63xx_wdt);
+}
+
+static void __exit bcm63xx_wdt_exit(void)
+{
+ platform_driver_unregister(&bcm63xx_wdt);
+}
+
+module_init(bcm63xx_wdt_init);
+module_exit(bcm63xx_wdt_exit);
+
+MODULE_AUTHOR("Miguel Gaio <miguel.gaio@efixo.com>");
+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
+MODULE_DESCRIPTION("Driver for the Broadcom BCM63xx SoC watchdog");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+MODULE_ALIAS("platform:bcm63xx-wdt");
diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c
index 7e5c266cda4..65e579635db 100644
--- a/drivers/watchdog/f71808e_wdt.c
+++ b/drivers/watchdog/f71808e_wdt.c
@@ -308,6 +308,12 @@ static int watchdog_start(void)
superio_set_bit(watchdog.sioaddr, 0x29, 1);
break;
+ case f71889fg:
+ /* set pin 40 to WDTRST# */
+ superio_outb(watchdog.sioaddr, 0x2b,
+ superio_inb(watchdog.sioaddr, 0x2b) & 0xcf);
+ break;
+
default:
/*
* 'default' label to shut up the compiler and catch
@@ -708,8 +714,10 @@ static int __init f71808e_find(int sioaddr)
case SIO_F71882_ID:
watchdog.type = f71882fg;
break;
- case SIO_F71862_ID:
case SIO_F71889_ID:
+ watchdog.type = f71889fg;
+ break;
+ case SIO_F71862_ID:
/* These have a watchdog, though it isn't implemented (yet). */
err = -ENOSYS;
goto exit;
diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
index 69de8713b8e..f7e90fe47b7 100644
--- a/drivers/watchdog/iTCO_wdt.c
+++ b/drivers/watchdog/iTCO_wdt.c
@@ -146,6 +146,7 @@ enum iTCO_chipsets {
TCO_CPT29, /* Cougar Point */
TCO_CPT30, /* Cougar Point */
TCO_CPT31, /* Cougar Point */
+ TCO_PBG, /* Patsburg */
};
static struct {
@@ -233,6 +234,7 @@ static struct {
{"Cougar Point", 2},
{"Cougar Point", 2},
{"Cougar Point", 2},
+ {"Patsburg", 2},
{NULL, 0}
};
@@ -348,6 +350,7 @@ static struct pci_device_id iTCO_wdt_pci_tbl[] = {
{ ITCO_PCI_DEVICE(0x1c5d, TCO_CPT29)},
{ ITCO_PCI_DEVICE(0x1c5e, TCO_CPT30)},
{ ITCO_PCI_DEVICE(0x1c5f, TCO_CPT31)},
+ { ITCO_PCI_DEVICE(0x1d40, TCO_PBG)},
{ 0, }, /* End of list */
};
MODULE_DEVICE_TABLE(pci, iTCO_wdt_pci_tbl);
@@ -374,7 +377,7 @@ static char expect_release;
static struct { /* this is private data for the iTCO_wdt device */
/* TCO version/generation */
unsigned int iTCO_version;
- /* The cards ACPIBASE address (TCOBASE = ACPIBASE+0x60) */
+ /* The device's ACPIBASE address (TCOBASE = ACPIBASE+0x60) */
unsigned long ACPIBASE;
/* NO_REBOOT flag is Memory-Mapped GCS register bit 5 (TCO version 2)*/
unsigned long __iomem *gcs;
@@ -467,7 +470,7 @@ static int iTCO_wdt_start(void)
if (iTCO_wdt_unset_NO_REBOOT_bit()) {
spin_unlock(&iTCO_wdt_private.io_lock);
printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, "
- "reboot disabled by hardware\n");
+ "reboot disabled by hardware/BIOS\n");
return -EIO;
}
@@ -781,8 +784,8 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
base_address &= 0x0000ff80;
if (base_address == 0x00000000) {
/* Something's wrong here, ACPIBASE has to be set */
- printk(KERN_ERR PFX "failed to get TCOBASE address\n");
- pci_dev_put(pdev);
+ printk(KERN_ERR PFX "failed to get TCOBASE address, "
+ "device disabled by hardware/BIOS\n");
return -ENODEV;
}
iTCO_wdt_private.iTCO_version =
@@ -797,7 +800,8 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
if (iTCO_wdt_private.iTCO_version == 2) {
pci_read_config_dword(pdev, 0xf0, &base_address);
if ((base_address & 1) == 0) {
- printk(KERN_ERR PFX "RCBA is disabled by hardware\n");
+ printk(KERN_ERR PFX "RCBA is disabled by hardware"
+ "/BIOS, device disabled\n");
ret = -ENODEV;
goto out;
}
@@ -808,7 +812,7 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
/* Check chipset's NO_REBOOT bit */
if (iTCO_wdt_unset_NO_REBOOT_bit() && iTCO_vendor_check_noreboot_on()) {
printk(KERN_INFO PFX "unable to reset NO_REBOOT flag, "
- "platform may have disabled it\n");
+ "device disabled by hardware/BIOS\n");
ret = -ENODEV; /* Cannot reset NO_REBOOT bit */
goto out_unmap;
}
@@ -819,7 +823,8 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
/* The TCO logic uses the TCO_EN bit in the SMI_EN register */
if (!request_region(SMI_EN, 4, "iTCO_wdt")) {
printk(KERN_ERR PFX
- "I/O address 0x%04lx already in use\n", SMI_EN);
+ "I/O address 0x%04lx already in use, "
+ "device disabled\n", SMI_EN);
ret = -EIO;
goto out_unmap;
}
@@ -831,8 +836,8 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
/* The TCO I/O registers reside in a 32-byte range pointed to
by the TCOBASE value */
if (!request_region(TCOBASE, 0x20, "iTCO_wdt")) {
- printk(KERN_ERR PFX "I/O address 0x%04lx already in use\n",
- TCOBASE);
+ printk(KERN_ERR PFX "I/O address 0x%04lx already in use "
+ "device disabled\n", TCOBASE);
ret = -EIO;
goto unreg_smi_en;
}
@@ -880,7 +885,6 @@ out_unmap:
if (iTCO_wdt_private.iTCO_version == 2)
iounmap(iTCO_wdt_private.gcs);
out:
- pci_dev_put(iTCO_wdt_private.pdev);
iTCO_wdt_private.ACPIBASE = 0;
return ret;
}
@@ -921,7 +925,7 @@ static int __devinit iTCO_wdt_probe(struct platform_device *dev)
}
if (!found)
- printk(KERN_INFO PFX "No card detected\n");
+ printk(KERN_INFO PFX "No device detected.\n");
return ret;
}
diff --git a/drivers/watchdog/it8712f_wdt.c b/drivers/watchdog/it8712f_wdt.c
index f52c162b1be..b32c6c045b1 100644
--- a/drivers/watchdog/it8712f_wdt.c
+++ b/drivers/watchdog/it8712f_wdt.c
@@ -75,15 +75,23 @@ static unsigned short address;
#define WDT_CONFIG 0x72 /* WDT Register: Configuration */
#define WDT_TIMEOUT 0x73 /* WDT Register: Timeout Value */
-#define WDT_RESET_GAME 0x10
-#define WDT_RESET_KBD 0x20
-#define WDT_RESET_MOUSE 0x40
-#define WDT_RESET_CIR 0x80
+#define WDT_RESET_GAME 0x10 /* Reset timer on read or write to game port */
+#define WDT_RESET_KBD 0x20 /* Reset timer on keyboard interrupt */
+#define WDT_RESET_MOUSE 0x40 /* Reset timer on mouse interrupt */
+#define WDT_RESET_CIR 0x80 /* Reset timer on consumer IR interrupt */
#define WDT_UNIT_SEC 0x80 /* If 0 in MINUTES */
-#define WDT_OUT_PWROK 0x10
-#define WDT_OUT_KRST 0x40
+#define WDT_OUT_PWROK 0x10 /* Pulse PWROK on timeout */
+#define WDT_OUT_KRST 0x40 /* Pulse reset on timeout */
+
+static int wdt_control_reg = WDT_RESET_GAME;
+module_param(wdt_control_reg, int, 0);
+MODULE_PARM_DESC(wdt_control_reg, "Value to write to watchdog control "
+ "register. The default WDT_RESET_GAME resets the timer on "
+ "game port reads that this driver generates. You can also "
+ "use KBD, MOUSE or CIR if you have some external way to "
+ "generate those interrupts.");
static int superio_inb(int reg)
{
@@ -131,7 +139,8 @@ static inline void superio_exit(void)
static inline void it8712f_wdt_ping(void)
{
- inb(address);
+ if (wdt_control_reg & WDT_RESET_GAME)
+ inb(address);
}
static void it8712f_wdt_update_margin(void)
@@ -170,7 +179,7 @@ static void it8712f_wdt_enable(void)
superio_enter();
superio_select(LDN_GPIO);
- superio_outb(WDT_RESET_GAME, WDT_CONTROL);
+ superio_outb(wdt_control_reg, WDT_CONTROL);
it8712f_wdt_update_margin();
diff --git a/drivers/watchdog/it87_wdt.c b/drivers/watchdog/it87_wdt.c
index b709b3b2d1e..dad29245a6a 100644
--- a/drivers/watchdog/it87_wdt.c
+++ b/drivers/watchdog/it87_wdt.c
@@ -12,7 +12,7 @@
* http://www.ite.com.tw/
*
* Support of the watchdog timers, which are available on
- * IT8716, IT8718, IT8726 and IT8712 (J,K version).
+ * IT8702, IT8712, IT8716, IT8718, IT8720 and IT8726.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -45,7 +45,7 @@
#include <asm/system.h>
-#define WATCHDOG_VERSION "1.12"
+#define WATCHDOG_VERSION "1.13"
#define WATCHDOG_NAME "IT87 WDT"
#define PFX WATCHDOG_NAME ": "
#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n"
@@ -76,10 +76,12 @@
/* Chip Id numbers */
#define NO_DEV_ID 0xffff
+#define IT8702_ID 0x8702
#define IT8705_ID 0x8705
#define IT8712_ID 0x8712
#define IT8716_ID 0x8716
#define IT8718_ID 0x8718
+#define IT8720_ID 0x8720
#define IT8726_ID 0x8726 /* the data sheet suggest wrongly 0x8716 */
/* GPIO Configuration Registers LDN=0x07 */
@@ -92,7 +94,7 @@
#define WDT_CIRINT 0x80
#define WDT_MOUSEINT 0x40
#define WDT_KYBINT 0x20
-#define WDT_GAMEPORT 0x10 /* not it8718 */
+#define WDT_GAMEPORT 0x10 /* not in it8718, it8720 */
#define WDT_FORCE 0x02
#define WDT_ZERO 0x01
@@ -132,7 +134,7 @@
#define WDTS_USE_GP 4
#define WDTS_EXPECTED 5
-static unsigned int base, gpact, ciract;
+static unsigned int base, gpact, ciract, max_units;
static unsigned long wdt_status;
static DEFINE_SPINLOCK(spinlock);
@@ -210,6 +212,33 @@ static inline void superio_outw(int val, int reg)
outb(val, VAL);
}
+/* Internal function, should be called after superio_select(GPIO) */
+static void wdt_update_timeout(void)
+{
+ unsigned char cfg = WDT_KRST | WDT_PWROK;
+ int tm = timeout;
+
+ if (testmode)
+ cfg = 0;
+
+ if (tm <= max_units)
+ cfg |= WDT_TOV1;
+ else
+ tm /= 60;
+
+ superio_outb(cfg, WDTCFG);
+ superio_outb(tm, WDTVALLSB);
+ if (max_units > 255)
+ superio_outb(tm>>8, WDTVALMSB);
+}
+
+static int wdt_round_time(int t)
+{
+ t += 59;
+ t -= t % 60;
+ return t;
+}
+
/* watchdog timer handling */
static void wdt_keepalive(void)
@@ -234,12 +263,7 @@ static void wdt_start(void)
superio_outb(WDT_GAMEPORT, WDTCTRL);
else
superio_outb(WDT_CIRINT, WDTCTRL);
- if (!testmode)
- superio_outb(WDT_TOV1 | WDT_KRST | WDT_PWROK, WDTCFG);
- else
- superio_outb(WDT_TOV1, WDTCFG);
- superio_outb(timeout>>8, WDTVALMSB);
- superio_outb(timeout, WDTVALLSB);
+ wdt_update_timeout();
superio_exit();
spin_unlock_irqrestore(&spinlock, flags);
@@ -255,8 +279,9 @@ static void wdt_stop(void)
superio_select(GPIO);
superio_outb(0x00, WDTCTRL);
superio_outb(WDT_TOV1, WDTCFG);
- superio_outb(0x00, WDTVALMSB);
superio_outb(0x00, WDTVALLSB);
+ if (max_units > 255)
+ superio_outb(0x00, WDTVALMSB);
superio_exit();
spin_unlock_irqrestore(&spinlock, flags);
@@ -266,8 +291,8 @@ static void wdt_stop(void)
* wdt_set_timeout - set a new timeout value with watchdog ioctl
* @t: timeout value in seconds
*
- * The hardware device has a 16 bit watchdog timer, thus the
- * timeout time ranges between 1 and 65535 seconds.
+ * The hardware device has a 8 or 16 bit watchdog timer (depends on
+ * chip version) that can be configured to count seconds or minutes.
*
* Used within WDIOC_SETTIMEOUT watchdog device ioctl.
*/
@@ -276,19 +301,19 @@ static int wdt_set_timeout(int t)
{
unsigned long flags;
- if (t < 1 || t > 65535)
+ if (t < 1 || t > max_units * 60)
return -EINVAL;
- timeout = t;
+ if (t > max_units)
+ timeout = wdt_round_time(t);
+ else
+ timeout = t;
spin_lock_irqsave(&spinlock, flags);
if (test_bit(WDTS_TIMER_RUN, &wdt_status)) {
superio_enter();
-
superio_select(GPIO);
- superio_outb(t>>8, WDTVALMSB);
- superio_outb(t, WDTVALLSB);
-
+ wdt_update_timeout();
superio_exit();
}
spin_unlock_irqrestore(&spinlock, flags);
@@ -529,10 +554,13 @@ static struct notifier_block wdt_notifier = {
static int __init it87_wdt_init(void)
{
int rc = 0;
+ int try_gameport = !nogameport;
u16 chip_type;
u8 chip_rev;
unsigned long flags;
+ wdt_status = 0;
+
spin_lock_irqsave(&spinlock, flags);
superio_enter();
chip_type = superio_inw(CHIPID);
@@ -541,13 +569,21 @@ static int __init it87_wdt_init(void)
spin_unlock_irqrestore(&spinlock, flags);
switch (chip_type) {
+ case IT8702_ID:
+ max_units = 255;
+ break;
+ case IT8712_ID:
+ max_units = (chip_rev < 8) ? 255 : 65535;
+ break;
case IT8716_ID:
- case IT8718_ID:
case IT8726_ID:
+ max_units = 65535;
+ break;
+ case IT8718_ID:
+ case IT8720_ID:
+ max_units = 65535;
+ try_gameport = 0;
break;
- case IT8712_ID:
- if (chip_rev > 7)
- break;
case IT8705_ID:
printk(KERN_ERR PFX
"Unsupported Chip found, Chip %04x Revision %02x\n",
@@ -571,7 +607,7 @@ static int __init it87_wdt_init(void)
superio_outb(0x00, WDTCTRL);
/* First try to get Gameport support */
- if (chip_type != IT8718_ID && !nogameport) {
+ if (try_gameport) {
superio_select(GAMEPORT);
base = superio_inw(BASEREG);
if (!base) {
@@ -623,13 +659,16 @@ static int __init it87_wdt_init(void)
spin_unlock_irqrestore(&spinlock, flags);
}
- if (timeout < 1 || timeout > 65535) {
+ if (timeout < 1 || timeout > max_units * 60) {
timeout = DEFAULT_TIMEOUT;
printk(KERN_WARNING PFX
"Timeout value out of range, use default %d sec\n",
DEFAULT_TIMEOUT);
}
+ if (timeout > max_units)
+ timeout = wdt_round_time(timeout);
+
rc = register_reboot_notifier(&wdt_notifier);
if (rc) {
printk(KERN_ERR PFX
@@ -656,7 +695,7 @@ static int __init it87_wdt_init(void)
outb(0x09, CIR_IER(base));
}
- printk(KERN_INFO PFX "Chip it%04x revision %d initialized. "
+ printk(KERN_INFO PFX "Chip IT%04x revision %d initialized. "
"timeout=%d sec (nowayout=%d testmode=%d exclusive=%d "
"nogameport=%d)\n", chip_type, chip_rev, timeout,
nowayout, testmode, exclusive, nogameport);
@@ -676,7 +715,7 @@ err_out_region:
spin_unlock_irqrestore(&spinlock, flags);
}
err_out:
- if (chip_type != IT8718_ID && !nogameport) {
+ if (try_gameport) {
spin_lock_irqsave(&spinlock, flags);
superio_enter();
superio_select(GAMEPORT);
@@ -698,8 +737,9 @@ static void __exit it87_wdt_exit(void)
superio_select(GPIO);
superio_outb(0x00, WDTCTRL);
superio_outb(0x00, WDTCFG);
- superio_outb(0x00, WDTVALMSB);
superio_outb(0x00, WDTVALLSB);
+ if (max_units > 255)
+ superio_outb(0x00, WDTVALMSB);
if (test_bit(WDTS_USE_GP, &wdt_status)) {
superio_select(GAMEPORT);
superio_outb(gpact, ACTREG);
diff --git a/drivers/watchdog/machzwd.c b/drivers/watchdog/machzwd.c
index 2d118cf022f..92803506939 100644
--- a/drivers/watchdog/machzwd.c
+++ b/drivers/watchdog/machzwd.c
@@ -143,7 +143,7 @@ static unsigned long next_heartbeat;
#ifndef ZF_DEBUG
# define dprintk(format, args...)
#else
-# define dprintk(format, args...) printk(KERN_DEBUG PFX
+# define dprintk(format, args...) printk(KERN_DEBUG PFX \
":%s:%d: " format, __func__, __LINE__ , ## args)
#endif
@@ -388,7 +388,7 @@ static struct notifier_block zf_notifier = {
static void __init zf_show_action(int act)
{
- char *str[] = { "RESET", "SMI", "NMI", "SCI" };
+ static const char * const str[] = { "RESET", "SMI", "NMI", "SCI" };
printk(KERN_INFO PFX ": Watchdog using action = %s\n", str[act]);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 18:40:10 +0000