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-rw-r--r--drivers/char/watchdog/Kconfig28
-rw-r--r--drivers/char/watchdog/Makefile2
-rw-r--r--drivers/char/watchdog/cpu5wdt.c9
-rw-r--r--drivers/char/watchdog/ixp4xx_wdt.c4
-rw-r--r--drivers/char/watchdog/mpc83xx_wdt.c229
-rw-r--r--drivers/char/watchdog/mpc8xx_wdt.c20
-rw-r--r--drivers/char/watchdog/pcwd_usb.c1
-rw-r--r--drivers/char/watchdog/s3c2410_wdt.c4
-rw-r--r--drivers/char/watchdog/sa1100_wdt.c12
-rw-r--r--drivers/char/watchdog/sbc_epx_c3.c216
-rw-r--r--drivers/char/watchdog/wdt977.c216
11 files changed, 642 insertions, 99 deletions
diff --git a/drivers/char/watchdog/Kconfig b/drivers/char/watchdog/Kconfig
index 344001b45af..c0dfcf273f0 100644
--- a/drivers/char/watchdog/Kconfig
+++ b/drivers/char/watchdog/Kconfig
@@ -395,12 +395,38 @@ config MACHZ_WDT
To compile this driver as a module, choose M here: the
module will be called machzwd.
+config SBC_EPX_C3_WATCHDOG
+ tristate "Winsystems SBC EPX-C3 watchdog"
+ depends on WATCHDOG && X86
+ ---help---
+ This is the driver for the built-in watchdog timer on the EPX-C3
+ Single-board computer made by Winsystems, Inc.
+
+ *Note*: This hardware watchdog is not probeable and thus there
+ is no way to know if writing to its IO address will corrupt
+ your system or have any real effect. The only way to be sure
+ that this driver does what you want is to make sure you
+ are runnning it on an EPX-C3 from Winsystems with the watchdog
+ timer at IO address 0x1ee and 0x1ef. It will write to both those
+ IO ports. Basically, the assumption is made that if you compile
+ this driver into your kernel and/or load it as a module, that you
+ know what you are doing and that you are in fact running on an
+ EPX-C3 board!
+
+ To compile this driver as a module, choose M here: the
+ module will be called sbc_epx_c3.
+
+
# PowerPC Architecture
config 8xx_WDT
tristate "MPC8xx Watchdog Timer"
depends on WATCHDOG && 8xx
+config 83xx_WDT
+ tristate "MPC83xx Watchdog Timer"
+ depends on WATCHDOG && PPC_83xx
+
config MV64X60_WDT
tristate "MV64X60 (Marvell Discovery) Watchdog Timer"
depends on WATCHDOG && MV64X60
@@ -438,7 +464,7 @@ config INDYDOG
config ZVM_WATCHDOG
tristate "z/VM Watchdog Timer"
- depends on WATCHDOG && ARCH_S390
+ depends on WATCHDOG && S390
help
IBM s/390 and zSeries machines running under z/VM 5.1 or later
provide a virtual watchdog timer to their guest that cause a
diff --git a/drivers/char/watchdog/Makefile b/drivers/char/watchdog/Makefile
index cfd0a398771..36c0b282b8b 100644
--- a/drivers/char/watchdog/Makefile
+++ b/drivers/char/watchdog/Makefile
@@ -52,9 +52,11 @@ obj-$(CONFIG_W83627HF_WDT) += w83627hf_wdt.o
obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o
obj-$(CONFIG_W83977F_WDT) += w83977f_wdt.o
obj-$(CONFIG_MACHZ_WDT) += machzwd.o
+obj-$(CONFIG_SBC_EPX_C3_WATCHDOG) += sbc_epx_c3.o
# PowerPC Architecture
obj-$(CONFIG_8xx_WDT) += mpc8xx_wdt.o
+obj-$(CONFIG_83xx_WDT) += mpc83xx_wdt.o
obj-$(CONFIG_MV64X60_WDT) += mv64x60_wdt.o
obj-$(CONFIG_BOOKE_WDT) += booke_wdt.o
diff --git a/drivers/char/watchdog/cpu5wdt.c b/drivers/char/watchdog/cpu5wdt.c
index e75045fe264..3e8410b5a65 100644
--- a/drivers/char/watchdog/cpu5wdt.c
+++ b/drivers/char/watchdog/cpu5wdt.c
@@ -28,6 +28,7 @@
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/timer.h>
+#include <linux/completion.h>
#include <linux/jiffies.h>
#include <asm/io.h>
#include <asm/uaccess.h>
@@ -57,7 +58,7 @@ static int ticks = 10000;
/* some device data */
static struct {
- struct semaphore stop;
+ struct completion stop;
volatile int running;
struct timer_list timer;
volatile int queue;
@@ -85,7 +86,7 @@ static void cpu5wdt_trigger(unsigned long unused)
}
else {
/* ticks doesn't matter anyway */
- up(&cpu5wdt_device.stop);
+ complete(&cpu5wdt_device.stop);
}
}
@@ -239,7 +240,7 @@ static int __devinit cpu5wdt_init(void)
if ( !val )
printk(KERN_INFO PFX "sorry, was my fault\n");
- init_MUTEX_LOCKED(&cpu5wdt_device.stop);
+ init_completion(&cpu5wdt_device.stop);
cpu5wdt_device.queue = 0;
clear_bit(0, &cpu5wdt_device.inuse);
@@ -269,7 +270,7 @@ static void __devexit cpu5wdt_exit(void)
{
if ( cpu5wdt_device.queue ) {
cpu5wdt_device.queue = 0;
- down(&cpu5wdt_device.stop);
+ wait_for_completion(&cpu5wdt_device.stop);
}
misc_deregister(&cpu5wdt_misc);
diff --git a/drivers/char/watchdog/ixp4xx_wdt.c b/drivers/char/watchdog/ixp4xx_wdt.c
index b5be8b11104..3800835ca8f 100644
--- a/drivers/char/watchdog/ixp4xx_wdt.c
+++ b/drivers/char/watchdog/ixp4xx_wdt.c
@@ -186,8 +186,8 @@ static int __init ixp4xx_wdt_init(void)
unsigned long processor_id;
asm("mrc p15, 0, %0, cr0, cr0, 0;" : "=r"(processor_id) :);
- if (!(processor_id & 0xf)) {
- printk("IXP4XXX Watchdog: Rev. A0 CPU detected - "
+ if (!(processor_id & 0xf) && !cpu_is_ixp46x()) {
+ printk("IXP4XXX Watchdog: Rev. A0 IXP42x CPU detected - "
"watchdog disabled\n");
return -ENODEV;
diff --git a/drivers/char/watchdog/mpc83xx_wdt.c b/drivers/char/watchdog/mpc83xx_wdt.c
new file mode 100644
index 00000000000..5d6f5061603
--- /dev/null
+++ b/drivers/char/watchdog/mpc83xx_wdt.c
@@ -0,0 +1,229 @@
+/*
+ * mpc83xx_wdt.c - MPC83xx watchdog userspace interface
+ *
+ * Authors: Dave Updegraff <dave@cray.org>
+ * Kumar Gala <galak@kernel.crashing.org>
+ * Attribution: from 83xx_wst: Florian Schirmer <jolt@tuxbox.org>
+ * ..and from sc520_wdt
+ *
+ * Note: it appears that you can only actually ENABLE or DISABLE the thing
+ * once after POR. Once enabled, you cannot disable, and vice versa.
+ *
+ * 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/config.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/watchdog.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+struct mpc83xx_wdt {
+ __be32 res0;
+ __be32 swcrr; /* System watchdog control register */
+#define SWCRR_SWTC 0xFFFF0000 /* Software Watchdog Time Count. */
+#define SWCRR_SWEN 0x00000004 /* Watchdog Enable bit. */
+#define SWCRR_SWRI 0x00000002 /* Software Watchdog Reset/Interrupt Select bit.*/
+#define SWCRR_SWPR 0x00000001 /* Software Watchdog Counter Prescale bit. */
+ __be32 swcnr; /* System watchdog count register */
+ u8 res1[2];
+ __be16 swsrr; /* System watchdog service register */
+ u8 res2[0xF0];
+};
+
+static struct mpc83xx_wdt __iomem *wd_base;
+
+static u16 timeout = 0xffff;
+module_param(timeout, ushort, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in ticks. (0<timeout<65536, default=65535");
+
+static int reset = 1;
+module_param(reset, bool, 0);
+MODULE_PARM_DESC(reset, "Watchdog Interrupt/Reset Mode. 0 = interrupt, 1 = reset");
+
+/*
+ * We always prescale, but if someone really doesn't want to they can set this
+ * to 0
+ */
+static int prescale = 1;
+static unsigned int timeout_sec;
+
+static unsigned long wdt_is_open;
+static spinlock_t wdt_spinlock;
+
+static void mpc83xx_wdt_keepalive(void)
+{
+ /* Ping the WDT */
+ spin_lock(&wdt_spinlock);
+ out_be16(&wd_base->swsrr, 0x556c);
+ out_be16(&wd_base->swsrr, 0xaa39);
+ spin_unlock(&wdt_spinlock);
+}
+
+static ssize_t mpc83xx_wdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ if (count)
+ mpc83xx_wdt_keepalive();
+ return count;
+}
+
+static int mpc83xx_wdt_open(struct inode *inode, struct file *file)
+{
+ u32 tmp = SWCRR_SWEN;
+ if (test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
+
+ /* Once we start the watchdog we can't stop it */
+ __module_get(THIS_MODULE);
+
+ /* Good, fire up the show */
+ if (prescale)
+ tmp |= SWCRR_SWPR;
+ if (reset)
+ tmp |= SWCRR_SWRI;
+
+ tmp |= timeout << 16;
+
+ out_be32(&wd_base->swcrr, tmp);
+
+ return nonseekable_open(inode, file);
+}
+
+static int mpc83xx_wdt_release(struct inode *inode, struct file *file)
+{
+ printk(KERN_CRIT "Unexpected close, not stopping watchdog!\n");
+ mpc83xx_wdt_keepalive();
+ clear_bit(0, &wdt_is_open);
+ return 0;
+}
+
+static int mpc83xx_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING,
+ .firmware_version = 1,
+ .identity = "MPC83xx",
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_KEEPALIVE:
+ mpc83xx_wdt_keepalive();
+ return 0;
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout_sec, p);
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+static struct file_operations mpc83xx_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = mpc83xx_wdt_write,
+ .ioctl = mpc83xx_wdt_ioctl,
+ .open = mpc83xx_wdt_open,
+ .release = mpc83xx_wdt_release,
+};
+
+static struct miscdevice mpc83xx_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &mpc83xx_wdt_fops,
+};
+
+static int __devinit mpc83xx_wdt_probe(struct platform_device *dev)
+{
+ struct resource *r;
+ int ret;
+ unsigned int *freq = dev->dev.platform_data;
+
+ /* get a pointer to the register memory */
+ r = platform_get_resource(dev, IORESOURCE_MEM, 0);
+
+ if (!r) {
+ ret = -ENODEV;
+ goto err_out;
+ }
+
+ wd_base = ioremap(r->start, sizeof (struct mpc83xx_wdt));
+
+ if (wd_base == NULL) {
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ ret = misc_register(&mpc83xx_wdt_miscdev);
+ if (ret) {
+ printk(KERN_ERR "cannot register miscdev on minor=%d "
+ "(err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto err_unmap;
+ }
+
+ /* Calculate the timeout in seconds */
+ if (prescale)
+ timeout_sec = (timeout * 0x10000) / (*freq);
+ else
+ timeout_sec = timeout / (*freq);
+
+ printk(KERN_INFO "WDT driver for MPC83xx initialized. "
+ "mode:%s timeout=%d (%d seconds)\n",
+ reset ? "reset":"interrupt", timeout, timeout_sec);
+
+ spin_lock_init(&wdt_spinlock);
+
+ return 0;
+
+err_unmap:
+ iounmap(wd_base);
+err_out:
+ return ret;
+}
+
+static int __devexit mpc83xx_wdt_remove(struct platform_device *dev)
+{
+ misc_deregister(&mpc83xx_wdt_miscdev);
+ iounmap(wd_base);
+
+ return 0;
+}
+
+static struct platform_driver mpc83xx_wdt_driver = {
+ .probe = mpc83xx_wdt_probe,
+ .remove = __devexit_p(mpc83xx_wdt_remove),
+ .driver = {
+ .name = "mpc83xx_wdt",
+ },
+};
+
+static int __init mpc83xx_wdt_init(void)
+{
+ return platform_driver_register(&mpc83xx_wdt_driver);
+}
+
+static void __exit mpc83xx_wdt_exit(void)
+{
+ platform_driver_unregister(&mpc83xx_wdt_driver);
+}
+
+module_init(mpc83xx_wdt_init);
+module_exit(mpc83xx_wdt_exit);
+
+MODULE_AUTHOR("Dave Updegraff, Kumar Gala");
+MODULE_DESCRIPTION("Driver for watchdog timer in MPC83xx uProcessor");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
diff --git a/drivers/char/watchdog/mpc8xx_wdt.c b/drivers/char/watchdog/mpc8xx_wdt.c
index 56d62ba7c6c..b2fc71e2085 100644
--- a/drivers/char/watchdog/mpc8xx_wdt.c
+++ b/drivers/char/watchdog/mpc8xx_wdt.c
@@ -18,6 +18,7 @@
#include <linux/watchdog.h>
#include <asm/8xx_immap.h>
#include <asm/uaccess.h>
+#include <asm/io.h>
#include <syslib/m8xx_wdt.h>
static unsigned long wdt_opened;
@@ -25,18 +26,26 @@ static int wdt_status;
static void mpc8xx_wdt_handler_disable(void)
{
- volatile immap_t *imap = (volatile immap_t *)IMAP_ADDR;
+ volatile uint __iomem *piscr;
+ piscr = (uint *)&((immap_t*)IMAP_ADDR)->im_sit.sit_piscr;
- imap->im_sit.sit_piscr &= ~(PISCR_PIE | PISCR_PTE);
+ 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 immap_t *imap = (volatile immap_t *)IMAP_ADDR;
+ volatile uint __iomem *piscr;
+ piscr = (uint *)&((immap_t*)IMAP_ADDR)->im_sit.sit_piscr;
- imap->im_sit.sit_piscr |= PISCR_PIE | PISCR_PTE;
+ 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");
}
@@ -68,9 +77,6 @@ static int mpc8xx_wdt_release(struct inode *inode, struct file *file)
static ssize_t mpc8xx_wdt_write(struct file *file, const char *data, size_t len,
loff_t * ppos)
{
- if (ppos != &file->f_pos)
- return -ESPIPE;
-
if (len)
m8xx_wdt_reset();
diff --git a/drivers/char/watchdog/pcwd_usb.c b/drivers/char/watchdog/pcwd_usb.c
index 092e9b13375..1533f56baa4 100644
--- a/drivers/char/watchdog/pcwd_usb.c
+++ b/drivers/char/watchdog/pcwd_usb.c
@@ -151,7 +151,6 @@ static void usb_pcwd_disconnect (struct usb_interface *interface);
/* usb specific object needed to register this driver with the usb subsystem */
static struct usb_driver usb_pcwd_driver = {
- .owner = THIS_MODULE,
.name = DRIVER_NAME,
.probe = usb_pcwd_probe,
.disconnect = usb_pcwd_disconnect,
diff --git a/drivers/char/watchdog/s3c2410_wdt.c b/drivers/char/watchdog/s3c2410_wdt.c
index eb667daee19..9dc54736e4e 100644
--- a/drivers/char/watchdog/s3c2410_wdt.c
+++ b/drivers/char/watchdog/s3c2410_wdt.c
@@ -46,12 +46,12 @@
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
+#include <linux/clk.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/arch/map.h>
-#include <asm/hardware/clock.h>
#undef S3C24XX_VA_WATCHDOG
#define S3C24XX_VA_WATCHDOG (0)
@@ -397,7 +397,6 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
return -ENOENT;
}
- clk_use(wdt_clock);
clk_enable(wdt_clock);
/* see if we can actually set the requested timer margin, and if
@@ -444,7 +443,6 @@ static int s3c2410wdt_remove(struct platform_device *dev)
if (wdt_clock != NULL) {
clk_disable(wdt_clock);
- clk_unuse(wdt_clock);
clk_put(wdt_clock);
wdt_clock = NULL;
}
diff --git a/drivers/char/watchdog/sa1100_wdt.c b/drivers/char/watchdog/sa1100_wdt.c
index fb88b4041dc..b474ea52d6e 100644
--- a/drivers/char/watchdog/sa1100_wdt.c
+++ b/drivers/char/watchdog/sa1100_wdt.c
@@ -74,7 +74,7 @@ static int sa1100dog_release(struct inode *inode, struct file *file)
return 0;
}
-static ssize_t sa1100dog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+static ssize_t sa1100dog_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
{
if (len)
/* Refresh OSMR3 timer. */
@@ -96,20 +96,20 @@ static int sa1100dog_ioctl(struct inode *inode, struct file *file,
switch (cmd) {
case WDIOC_GETSUPPORT:
- ret = copy_to_user((struct watchdog_info *)arg, &ident,
+ ret = copy_to_user((struct watchdog_info __user *)arg, &ident,
sizeof(ident)) ? -EFAULT : 0;
break;
case WDIOC_GETSTATUS:
- ret = put_user(0, (int *)arg);
+ ret = put_user(0, (int __user *)arg);
break;
case WDIOC_GETBOOTSTATUS:
- ret = put_user(boot_status, (int *)arg);
+ ret = put_user(boot_status, (int __user *)arg);
break;
case WDIOC_SETTIMEOUT:
- ret = get_user(time, (int *)arg);
+ ret = get_user(time, (int __user *)arg);
if (ret)
break;
@@ -123,7 +123,7 @@ static int sa1100dog_ioctl(struct inode *inode, struct file *file,
/*fall through*/
case WDIOC_GETTIMEOUT:
- ret = put_user(pre_margin / OSCR_FREQ, (int *)arg);
+ ret = put_user(pre_margin / OSCR_FREQ, (int __user *)arg);
break;
case WDIOC_KEEPALIVE:
diff --git a/drivers/char/watchdog/sbc_epx_c3.c b/drivers/char/watchdog/sbc_epx_c3.c
new file mode 100644
index 00000000000..951764614eb
--- /dev/null
+++ b/drivers/char/watchdog/sbc_epx_c3.c
@@ -0,0 +1,216 @@
+/*
+ * SBC EPX C3 0.1 A Hardware Watchdog Device for the Winsystems EPX-C3
+ * single board computer
+ *
+ * (c) Copyright 2006 Calin A. Culianu <calin@ajvar.org>, 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.
+ *
+ * based on softdog.c by Alan Cox <alan@redhat.com>
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/config.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/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define PFX "epx_c3: "
+static int epx_c3_alive;
+
+#define WATCHDOG_TIMEOUT 1 /* 1 sec default timeout */
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
+
+#define EPXC3_WATCHDOG_CTL_REG 0x1ee /* write 1 to enable, 0 to disable */
+#define EPXC3_WATCHDOG_PET_REG 0x1ef /* write anything to pet once enabled */
+
+static void epx_c3_start(void)
+{
+ outb(1, EPXC3_WATCHDOG_CTL_REG);
+}
+
+static void epx_c3_stop(void)
+{
+
+ outb(0, EPXC3_WATCHDOG_CTL_REG);
+
+ printk(KERN_INFO PFX "Stopped watchdog timer.\n");
+}
+
+static void epx_c3_pet(void)
+{
+ outb(1, EPXC3_WATCHDOG_PET_REG);
+}
+
+/*
+ * Allow only one person to hold it open
+ */
+static int epx_c3_open(struct inode *inode, struct file *file)
+{
+ if (epx_c3_alive)
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Activate timer */
+ epx_c3_start();
+ epx_c3_pet();
+
+ epx_c3_alive = 1;
+ printk(KERN_INFO "Started watchdog timer.\n");
+
+ return nonseekable_open(inode, file);
+}
+
+static int epx_c3_release(struct inode *inode, struct file *file)
+{
+ /* Shut off the timer.
+ * Lock it in if it's a module and we defined ...NOWAYOUT */
+ if (!nowayout)
+ epx_c3_stop(); /* Turn the WDT off */
+
+ epx_c3_alive = 0;
+
+ return 0;
+}
+
+static ssize_t epx_c3_write(struct file *file, const char *data,
+ size_t len, loff_t *ppos)
+{
+ /* Refresh the timer. */
+ if (len)
+ epx_c3_pet();
+ return len;
+}
+
+static int epx_c3_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int options, retval = -EINVAL;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 0,
+ .identity = "Winsystems EPX-C3 H/W Watchdog",
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user((struct watchdog_info *)arg,
+ &ident, sizeof(ident)))
+ return -EFAULT;
+ return 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0,(int *)arg);
+ case WDIOC_KEEPALIVE:
+ epx_c3_pet();
+ return 0;
+ case WDIOC_GETTIMEOUT:
+ return put_user(WATCHDOG_TIMEOUT,(int *)arg);
+ case WDIOC_SETOPTIONS: {
+ if (get_user(options, (int *)arg))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ epx_c3_stop();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ epx_c3_start();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+static int epx_c3_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ epx_c3_stop(); /* Turn the WDT off */
+
+ return NOTIFY_DONE;
+}
+
+static struct file_operations epx_c3_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = epx_c3_write,
+ .ioctl = epx_c3_ioctl,
+ .open = epx_c3_open,
+ .release = epx_c3_release,
+};
+
+static struct miscdevice epx_c3_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &epx_c3_fops,
+};
+
+static struct notifier_block epx_c3_notifier = {
+ .notifier_call = epx_c3_notify_sys,
+};
+
+static const char banner[] __initdata =
+ KERN_INFO PFX "Hardware Watchdog Timer for Winsystems EPX-C3 SBC: 0.1\n";
+
+static int __init watchdog_init(void)
+{
+ int ret;
+
+ ret = register_reboot_notifier(&epx_c3_notifier);
+ if (ret) {
+ printk(KERN_ERR PFX "cannot register reboot notifier "
+ "(err=%d)\n", ret);
+ return ret;
+ }
+
+ ret = misc_register(&epx_c3_miscdev);
+ if (ret) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d "
+ "(err=%d)\n", WATCHDOG_MINOR, ret);
+ unregister_reboot_notifier(&epx_c3_notifier);
+ return ret;
+ }
+
+ printk(banner);
+
+ return 0;
+}
+
+static void __exit watchdog_exit(void)
+{
+ misc_deregister(&epx_c3_miscdev);
+ unregister_reboot_notifier(&epx_c3_notifier);
+}
+
+module_init(watchdog_init);
+module_exit(watchdog_exit);
+
+MODULE_AUTHOR("Calin A. Culianu <calin@ajvar.org>");
+MODULE_DESCRIPTION("Hardware Watchdog Device for Winsystems EPX-C3 SBC. Note that there is no way to probe for this device -- so only use it if you are *sure* you are runnning on this specific SBC system from Winsystems! It writes to IO ports 0x1ee and 0x1ef!");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
diff --git a/drivers/char/watchdog/wdt977.c b/drivers/char/watchdog/wdt977.c
index 44d49dfacbb..3843900e94c 100644
--- a/drivers/char/watchdog/wdt977.c
+++ b/drivers/char/watchdog/wdt977.c
@@ -1,5 +1,5 @@
/*
- * Wdt977 0.03: A Watchdog Device for Netwinder W83977AF chip
+ * Wdt977 0.04: A Watchdog Device for Netwinder W83977AF chip
*
* (c) Copyright 1998 Rebel.com (Woody Suwalski <woody@netwinder.org>)
*
@@ -18,6 +18,8 @@
* from minutes to seconds.
* 07-Jul-2003 Daniele Bellucci: Audit return code of misc_register in
* nwwatchdog_init.
+ * 25-Oct-2005 Woody Suwalski: Convert addresses to #defs, add spinlocks
+ * remove limitiation to be used on Netwinders only
*/
#include <linux/module.h>
@@ -28,6 +30,7 @@
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/init.h>
+#include <linux/ioport.h>
#include <linux/watchdog.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
@@ -37,8 +40,18 @@
#include <asm/mach-types.h>
#include <asm/uaccess.h>
-#define PFX "Wdt977: "
-#define WATCHDOG_MINOR 130
+#define WATCHDOG_VERSION "0.04"
+#define WATCHDOG_NAME "Wdt977"
+#define PFX WATCHDOG_NAME ": "
+#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n"
+
+#define IO_INDEX_PORT 0x370 /* on some systems it can be 0x3F0 */
+#define IO_DATA_PORT (IO_INDEX_PORT+1)
+
+#define UNLOCK_DATA 0x87
+#define LOCK_DATA 0xAA
+#define DEVICE_REGISTER 0x07
+
#define DEFAULT_TIMEOUT 60 /* default timeout in seconds */
@@ -47,6 +60,7 @@ static int timeoutM; /* timeout in minutes */
static unsigned long timer_alive;
static int testmode;
static char expect_close;
+static spinlock_t spinlock;
module_param(timeout, int, 0);
MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (60..15300), default=" __MODULE_STRING(DEFAULT_TIMEOUT) ")");
@@ -63,9 +77,13 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CON
static int wdt977_start(void)
{
+ unsigned long flags;
+
+ spin_lock_irqsave(&spinlock, flags);
+
/* unlock the SuperIO chip */
- outb(0x87,0x370);
- outb(0x87,0x370);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
/* select device Aux2 (device=8) and set watchdog regs F2, F3 and F4
* F2 has the timeout in minutes
@@ -73,28 +91,29 @@ static int wdt977_start(void)
* at timeout, and to reset timer on kbd/mouse activity (not impl.)
* F4 is used to just clear the TIMEOUT'ed state (bit 0)
*/
- outb(0x07,0x370);
- outb(0x08,0x371);
- outb(0xF2,0x370);
- outb(timeoutM,0x371);
- outb(0xF3,0x370);
- outb(0x00,0x371); /* another setting is 0E for kbd/mouse/LED */
- outb(0xF4,0x370);
- outb(0x00,0x371);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(timeoutM, IO_DATA_PORT);
+ outb_p(0xF3, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT); /* another setting is 0E for kbd/mouse/LED */
+ outb_p(0xF4, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
/* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */
/* in test mode watch the bit 1 on F4 to indicate "triggered" */
if (!testmode)
{
- outb(0x07,0x370);
- outb(0x07,0x371);
- outb(0xE6,0x370);
- outb(0x08,0x371);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x07, IO_DATA_PORT);
+ outb_p(0xE6, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
}
/* lock the SuperIO chip */
- outb(0xAA,0x370);
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
+ spin_unlock_irqrestore(&spinlock, flags);
printk(KERN_INFO PFX "activated.\n");
return 0;
@@ -106,35 +125,39 @@ static int wdt977_start(void)
static int wdt977_stop(void)
{
+ unsigned long flags;
+ spin_lock_irqsave(&spinlock, flags);
+
/* unlock the SuperIO chip */
- outb(0x87,0x370);
- outb(0x87,0x370);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
/* select device Aux2 (device=8) and set watchdog regs F2,F3 and F4
* F3 is reset to its default state
* F4 can clear the TIMEOUT'ed state (bit 0) - back to default
* We can not use GP17 as a PowerLed, as we use its usage as a RedLed
*/
- outb(0x07,0x370);
- outb(0x08,0x371);
- outb(0xF2,0x370);
- outb(0xFF,0x371);
- outb(0xF3,0x370);
- outb(0x00,0x371);
- outb(0xF4,0x370);
- outb(0x00,0x371);
- outb(0xF2,0x370);
- outb(0x00,0x371);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(0xFF, IO_DATA_PORT);
+ outb_p(0xF3, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
+ outb_p(0xF4, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
/* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */
- outb(0x07,0x370);
- outb(0x07,0x371);
- outb(0xE6,0x370);
- outb(0x08,0x371);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x07, IO_DATA_PORT);
+ outb_p(0xE6, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
/* lock the SuperIO chip */
- outb(0xAA,0x370);
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
+ spin_unlock_irqrestore(&spinlock, flags);
printk(KERN_INFO PFX "shutdown.\n");
return 0;
@@ -147,19 +170,23 @@ static int wdt977_stop(void)
static int wdt977_keepalive(void)
{
+ unsigned long flags;
+ spin_lock_irqsave(&spinlock, flags);
+
/* unlock the SuperIO chip */
- outb(0x87,0x370);
- outb(0x87,0x370);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
/* select device Aux2 (device=8) and kicks watchdog reg F2 */
/* F2 has the timeout in minutes */
- outb(0x07,0x370);
- outb(0x08,0x371);
- outb(0xF2,0x370);
- outb(timeoutM,0x371);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(timeoutM, IO_DATA_PORT);
/* lock the SuperIO chip */
- outb(0xAA,0x370);
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
+ spin_unlock_irqrestore(&spinlock, flags);
return 0;
}
@@ -198,22 +225,26 @@ static int wdt977_set_timeout(int t)
static int wdt977_get_status(int *status)
{
int new_status;
+ unsigned long flags;
- *status=0;
+ spin_lock_irqsave(&spinlock, flags);
/* unlock the SuperIO chip */
- outb(0x87,0x370);
- outb(0x87,0x370);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
/* select device Aux2 (device=8) and read watchdog reg F4 */
- outb(0x07,0x370);
- outb(0x08,0x371);
- outb(0xF4,0x370);
- new_status = inb(0x371);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF4, IO_INDEX_PORT);
+ new_status = inb_p(IO_DATA_PORT);
/* lock the SuperIO chip */
- outb(0xAA,0x370);
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
+ spin_unlock_irqrestore(&spinlock, flags);
+
+ *status=0;
if (new_status & 1)
*status |= WDIOF_CARDRESET;
@@ -249,8 +280,8 @@ static int wdt977_release(struct inode *inode, struct file *file)
wdt977_stop();
clear_bit(0,&timer_alive);
} else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
wdt977_keepalive();
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
}
expect_close = 0;
return 0;
@@ -271,14 +302,17 @@ static int wdt977_release(struct inode *inode, struct file *file)
static ssize_t wdt977_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- if (count) {
- if (!nowayout) {
+ if (count)
+ {
+ if (!nowayout)
+ {
size_t i;
/* In case it was set long ago */
expect_close = 0;
- for (i = 0; i != count; i++) {
+ for (i = 0; i != count; i++)
+ {
char c;
if (get_user(c, buf + i))
return -EFAULT;
@@ -287,6 +321,7 @@ static ssize_t wdt977_write(struct file *file, const char __user *buf,
}
}
+ /* someone wrote to us, we should restart timer */
wdt977_keepalive();
}
return count;
@@ -308,7 +343,7 @@ static struct watchdog_info ident = {
WDIOF_MAGICCLOSE |
WDIOF_KEEPALIVEPING,
.firmware_version = 1,
- .identity = "Winbond 83977",
+ .identity = WATCHDOG_NAME,
};
static int wdt977_ioctl(struct inode *inode, struct file *file,
@@ -405,50 +440,81 @@ static struct notifier_block wdt977_notifier = {
.notifier_call = wdt977_notify_sys,
};
-static int __init nwwatchdog_init(void)
+static int __init wd977_init(void)
{
- int retval;
- if (!machine_is_netwinder())
- return -ENODEV;
+ int rc;
+
+ //if (!machine_is_netwinder())
+ // return -ENODEV;
+
+ printk(KERN_INFO PFX DRIVER_VERSION);
+
+ spin_lock_init(&spinlock);
/* Check that the timeout value is within it's range ; if not reset to the default */
- if (wdt977_set_timeout(timeout)) {
+ if (wdt977_set_timeout(timeout))
+ {
wdt977_set_timeout(DEFAULT_TIMEOUT);
printk(KERN_INFO PFX "timeout value must be 60<timeout<15300, using %d\n",
DEFAULT_TIMEOUT);
}
- retval = register_reboot_notifier(&wdt977_notifier);
- if (retval) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- retval);
- return retval;
+ /* on Netwinder the IOports are already reserved by
+ * arch/arm/mach-footbridge/netwinder-hw.c
+ */
+ if (!machine_is_netwinder())
+ {
+ if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME))
+ {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ IO_INDEX_PORT);
+ rc = -EIO;
+ goto err_out;
+ }
}
- retval = misc_register(&wdt977_miscdev);
- if (retval) {
+ rc = misc_register(&wdt977_miscdev);
+ if (rc)
+ {
printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, retval);
- unregister_reboot_notifier(&wdt977_notifier);
- return retval;
+ wdt977_miscdev.minor, rc);
+ goto err_out_region;
+ }
+
+ rc = register_reboot_notifier(&wdt977_notifier);
+ if (rc)
+ {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
+ goto err_out_miscdev;
}
- printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d, testmode = %i)\n",
+ printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d, testmode=%i)\n",
timeout, nowayout, testmode);
return 0;
+
+err_out_miscdev:
+ misc_deregister(&wdt977_miscdev);
+err_out_region:
+ if (!machine_is_netwinder())
+ release_region(IO_INDEX_PORT,2);
+err_out:
+ return rc;
}
-static void __exit nwwatchdog_exit(void)
+static void __exit wd977_exit(void)
{
+ wdt977_stop();
misc_deregister(&wdt977_miscdev);
unregister_reboot_notifier(&wdt977_notifier);
+ release_region(IO_INDEX_PORT,2);
}
-module_init(nwwatchdog_init);
-module_exit(nwwatchdog_exit);
+module_init(wd977_init);
+module_exit(wd977_exit);
-MODULE_AUTHOR("Woody Suwalski <woody@netwinder.org>");
+MODULE_AUTHOR("Woody Suwalski <woodys@xandros.com>");
MODULE_DESCRIPTION("W83977AF Watchdog driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-01-07 01:19:52 +0000