9 files changed, 118 insertions, 128 deletions

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 09a3d5522b43..325c10ff6a2c 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -406,7 +406,7 @@ config ITCO_WDT
         ---help---
           Hardware driver for the intel TCO timer based watchdog devices.
           These drivers are included in the Intel 82801 I/O Controller
-          Hub family (from ICH0 up to ICH8) and in the Intel 6300ESB
+          Hub family (from ICH0 up to ICH10) and in the Intel 63xxESB
           controller hub.
 
           The TCO (Total Cost of Ownership) timer is a watchdog timer
diff --git a/drivers/watchdog/at91rm9200_wdt.c b/drivers/watchdog/at91rm9200_wdt.c
index 5531691f46ea..e35d54589232 100644
--- a/drivers/watchdog/at91rm9200_wdt.c
+++ b/drivers/watchdog/at91rm9200_wdt.c
@@ -107,10 +107,10 @@ static int at91_wdt_close(struct inode *inode, struct file *file)
 static int at91_wdt_settimeout(int new_time)
 {
         /*
-         * All counting occurs at SLOW_CLOCK / 128 = 0.256 Hz
+         * All counting occurs at SLOW_CLOCK / 128 = 256 Hz
          *
          * Since WDV is a 16-bit counter, the maximum period is
-         * 65536 / 0.256 = 256 seconds.
+         * 65536 / 256 = 256 seconds.
          */
         if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
                 return -EINVAL;
diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c
index b1da287f90ec..a56ac84381b1 100644
--- a/drivers/watchdog/at91sam9_wdt.c
+++ b/drivers/watchdog/at91sam9_wdt.c
@@ -18,6 +18,7 @@
 #include <linux/errno.h>
 #include <linux/fs.h>
 #include <linux/init.h>
+#include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/miscdevice.h>
 #include <linux/module.h>
diff --git a/drivers/watchdog/gef_wdt.c b/drivers/watchdog/gef_wdt.c
index f0c2b7a1a175..734d9806a872 100644
--- a/drivers/watchdog/gef_wdt.c
+++ b/drivers/watchdog/gef_wdt.c
@@ -269,7 +269,7 @@ static int __devinit gef_wdt_probe(struct of_device *dev,
         bus_clk = 133; /* in MHz */
 
         freq = fsl_get_sys_freq();
-        if (freq > 0)
+        if (freq != -1)
                 bus_clk = freq;
 
         /* Map devices registers into memory */
diff --git a/drivers/watchdog/iTCO_vendor_support.c b/drivers/watchdog/iTCO_vendor_support.c
index 2474ebca88f6..d8264ad0be41 100644
--- a/drivers/watchdog/iTCO_vendor_support.c
+++ b/drivers/watchdog/iTCO_vendor_support.c
@@ -1,7 +1,7 @@
 /*
  *      intel TCO vendor specific watchdog driver support
  *
- *      (c) Copyright 2006-2008 Wim Van Sebroeck <wim@iguana.be>.
+ *      (c) Copyright 2006-2009 Wim Van Sebroeck <wim@iguana.be>.
  *
  *      This program is free software; you can redistribute it and/or
  *      modify it under the terms of the GNU General Public License
@@ -19,7 +19,7 @@
 
 /* Module and version information */
 #define DRV_NAME        "iTCO_vendor_support"
-#define DRV_VERSION     "1.02"
+#define DRV_VERSION     "1.03"
 #define PFX             DRV_NAME ": "
 
 /* Includes */
@@ -77,6 +77,26 @@ MODULE_PARM_DESC(vendorsupport, "iTCO vendor specific support mode, default=0 (n
  *          20.6 seconds.
  */
 
+static void supermicro_old_pre_start(unsigned long acpibase)
+{
+        unsigned long val32;
+
+        /* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI# */
+        val32 = inl(SMI_EN);
+        val32 &= 0xffffdfff;    /* Turn off SMI clearing watchdog */
+        outl(val32, SMI_EN);    /* Needed to activate watchdog */
+}
+
+static void supermicro_old_pre_stop(unsigned long acpibase)
+{
+        unsigned long val32;
+
+        /* Bit 13: TCO_EN -> 1 = Enables the TCO logic to generate SMI# */
+        val32 = inl(SMI_EN);
+        val32 |= 0x00002000;    /* Turn on SMI clearing watchdog */
+        outl(val32, SMI_EN);    /* Needed to deactivate watchdog */
+}
+
 static void supermicro_old_pre_keepalive(unsigned long acpibase)
 {
         /* Reload TCO Timer (done in iTCO_wdt_keepalive) + */
@@ -228,14 +248,18 @@ static void supermicro_new_pre_set_heartbeat(unsigned int heartbeat)
 void iTCO_vendor_pre_start(unsigned long acpibase,
                            unsigned int heartbeat)
 {
-        if (vendorsupport == SUPERMICRO_NEW_BOARD)
+        if (vendorsupport == SUPERMICRO_OLD_BOARD)
+                supermicro_old_pre_start(acpibase);
+        else if (vendorsupport == SUPERMICRO_NEW_BOARD)
                 supermicro_new_pre_start(heartbeat);
 }
 EXPORT_SYMBOL(iTCO_vendor_pre_start);
 
 void iTCO_vendor_pre_stop(unsigned long acpibase)
 {
-        if (vendorsupport == SUPERMICRO_NEW_BOARD)
+        if (vendorsupport == SUPERMICRO_OLD_BOARD)
+                supermicro_old_pre_stop(acpibase);
+        else if (vendorsupport == SUPERMICRO_NEW_BOARD)
                 supermicro_new_pre_stop();
 }
 EXPORT_SYMBOL(iTCO_vendor_pre_stop);
diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
index 5b395a4ddfdf..352334947ea3 100644
--- a/drivers/watchdog/iTCO_wdt.c
+++ b/drivers/watchdog/iTCO_wdt.c
@@ -1,7 +1,7 @@
 /*
- *      intel TCO Watchdog Driver (Used in i82801 and i6300ESB chipsets)
+ *      intel TCO Watchdog Driver (Used in i82801 and i63xxESB chipsets)
  *
- *      (c) Copyright 2006-2008 Wim Van Sebroeck <wim@iguana.be>.
+ *      (c) Copyright 2006-2009 Wim Van Sebroeck <wim@iguana.be>.
  *
  *      This program is free software; you can redistribute it and/or
  *      modify it under the terms of the GNU General Public License
@@ -63,7 +63,7 @@
 
 /* Module and version information */
 #define DRV_NAME        "iTCO_wdt"
-#define DRV_VERSION     "1.04"
+#define DRV_VERSION     "1.05"
 #define PFX             DRV_NAME ": "
 
 /* Includes */
@@ -236,16 +236,16 @@ MODULE_DEVICE_TABLE(pci, iTCO_wdt_pci_tbl);
 
 /* Address definitions for the TCO */
 /* TCO base address */
-#define TCOBASE         iTCO_wdt_private.ACPIBASE + 0x60
+#define TCOBASE         iTCO_wdt_private.ACPIBASE + 0x60
 /* SMI Control and Enable Register */
-#define SMI_EN          iTCO_wdt_private.ACPIBASE + 0x30
+#define SMI_EN          iTCO_wdt_private.ACPIBASE + 0x30
 
 #define TCO_RLD         TCOBASE + 0x00  /* TCO Timer Reload and Curr. Value */
 #define TCOv1_TMR       TCOBASE + 0x01  /* TCOv1 Timer Initial Value    */
-#define TCO_DAT_IN      TCOBASE + 0x02  /* TCO Data In Register         */
-#define TCO_DAT_OUT     TCOBASE + 0x03  /* TCO Data Out Register        */
-#define TCO1_STS        TCOBASE + 0x04  /* TCO1 Status Register         */
-#define TCO2_STS        TCOBASE + 0x06  /* TCO2 Status Register         */
+#define TCO_DAT_IN      TCOBASE + 0x02  /* TCO Data In Register         */
+#define TCO_DAT_OUT     TCOBASE + 0x03  /* TCO Data Out Register        */
+#define TCO1_STS        TCOBASE + 0x04  /* TCO1 Status Register         */
+#define TCO2_STS        TCOBASE + 0x06  /* TCO2 Status Register         */
 #define TCO1_CNT        TCOBASE + 0x08  /* TCO1 Control Register        */
 #define TCO2_CNT        TCOBASE + 0x0a  /* TCO2 Control Register        */
 #define TCOv2_TMR       TCOBASE + 0x12  /* TCOv2 Timer Initial Value    */
@@ -338,7 +338,6 @@ static int iTCO_wdt_unset_NO_REBOOT_bit(void)
 static int iTCO_wdt_start(void)
 {
         unsigned int val;
-        unsigned long val32;
 
         spin_lock(&iTCO_wdt_private.io_lock);
 
@@ -351,11 +350,6 @@ static int iTCO_wdt_start(void)
                 return -EIO;
         }
 
-        /* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI# */
-        val32 = inl(SMI_EN);
-        val32 &= 0xffffdfff;    /* Turn off SMI clearing watchdog */
-        outl(val32, SMI_EN);
-
         /* Force the timer to its reload value by writing to the TCO_RLD
            register */
         if (iTCO_wdt_private.iTCO_version == 2)
@@ -378,7 +372,6 @@ static int iTCO_wdt_start(void)
 static int iTCO_wdt_stop(void)
 {
         unsigned int val;
-        unsigned long val32;
 
         spin_lock(&iTCO_wdt_private.io_lock);
 
@@ -390,11 +383,6 @@ static int iTCO_wdt_stop(void)
         outw(val, TCO1_CNT);
         val = inw(TCO1_CNT);
 
-        /* Bit 13: TCO_EN -> 1 = Enables the TCO logic to generate SMI# */
-        val32 = inl(SMI_EN);
-        val32 |= 0x00002000;
-        outl(val32, SMI_EN);
-
         /* Set the NO_REBOOT bit to prevent later reboots, just for sure */
         iTCO_wdt_set_NO_REBOOT_bit();
 
@@ -649,6 +637,7 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
         int ret;
         u32 base_address;
         unsigned long RCBA;
+        unsigned long val32;
 
         /*
          *      Find the ACPI/PM base I/O address which is the base
@@ -695,6 +684,10 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
                 ret = -EIO;
                 goto out;
         }
+        /* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI# */
+        val32 = inl(SMI_EN);
+        val32 &= 0xffffdfff;    /* Turn off SMI clearing watchdog */
+        outl(val32, SMI_EN);
 
         /* The TCO I/O registers reside in a 32-byte range pointed to
            by the TCOBASE value */
diff --git a/drivers/watchdog/ks8695_wdt.c b/drivers/watchdog/ks8695_wdt.c
index 0b798fdaa378..74c92d384112 100644
--- a/drivers/watchdog/ks8695_wdt.c
+++ b/drivers/watchdog/ks8695_wdt.c
@@ -21,6 +21,7 @@
 #include <linux/watchdog.h>
 #include <linux/io.h>
 #include <linux/uaccess.h>
+#include <mach/timex.h>
 #include <mach/regs-timer.h>
 
 #define WDT_DEFAULT_TIME        5       /* seconds */
diff --git a/drivers/watchdog/orion5x_wdt.c b/drivers/watchdog/orion5x_wdt.c
index 14a339f58b6a..b64ae1a17832 100644
--- a/drivers/watchdog/orion5x_wdt.c
+++ b/drivers/watchdog/orion5x_wdt.c
@@ -29,6 +29,7 @@
 #define  WDT_EN                 0x0010
 #define WDT_VAL                 (TIMER_VIRT_BASE + 0x0024)
 
+#define ORION5X_TCLK            166666667
 #define WDT_MAX_DURATION        (0xffffffff / ORION5X_TCLK)
 #define WDT_IN_USE              0
 #define WDT_OK_TO_CLOSE         1
diff --git a/drivers/watchdog/rc32434_wdt.c b/drivers/watchdog/rc32434_wdt.c
index 57027f4653ce..f3553fa40b17 100644
--- a/drivers/watchdog/rc32434_wdt.c
+++ b/drivers/watchdog/rc32434_wdt.c
@@ -34,104 +34,89 @@
 #include <asm/time.h>
 #include <asm/mach-rc32434/integ.h>
 
-#define MAX_TIMEOUT                     20
-#define RC32434_WDT_INTERVAL            (15 * HZ)
-
-#define VERSION "0.2"
+#define VERSION "0.4"
 
 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;
+
+/* Board internal clock speed in Hz,
+ * the watchdog timer ticks at. */
+extern unsigned int idt_cpu_freq;
+
+/* translate wtcompare value to seconds and vice versa */
+#define WTCOMP2SEC(x)   (x / idt_cpu_freq)
+#define SEC2WTCOMP(x)   (x * idt_cpu_freq)
+
+/* Use a default timeout of 20s. This should be
+ * safe for CPU clock speeds up to 400MHz, as
+ * ((2 ^ 32) - 1) / (400MHz / 2) = 21s.  */
+#define WATCHDOG_TIMEOUT 20
+
+static int timeout = WATCHDOG_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) ")");
 
+/* apply or and nand masks to data read from addr and write back */
+#define SET_BITS(addr, or, nand) \
+        writel((readl(&addr) | or) & ~nand, &addr)
 
 static void rc32434_wdt_start(void)
 {
-        u32 val;
-
-        if (!rc32434_wdt_device.inuse) {
-                writel(0, &wdt_reg->wtcount);
+        u32 or, nand;
 
-                val = RC32434_ERR_WRE;
-                writel(readl(&wdt_reg->errcs) | val, &wdt_reg->errcs);
+        /* zero the counter before enabling */
+        writel(0, &wdt_reg->wtcount);
 
-                val = RC32434_WTC_EN;
-                writel(readl(&wdt_reg->wtc) | val, &wdt_reg->wtc);
-        }
-        rc32434_wdt_device.running++;
-}
+        /* don't generate a non-maskable interrupt,
+         * do a warm reset instead */
+        nand = 1 << RC32434_ERR_WNE;
+        or = 1 << RC32434_ERR_WRE;
 
-static void rc32434_wdt_stop(void)
-{
-        u32 val;
+        /* reset the ERRCS timeout bit in case it's set */
+        nand |= 1 << RC32434_ERR_WTO;
 
-        if (rc32434_wdt_device.running) {
+        SET_BITS(wdt_reg->errcs, or, nand);
 
-                val = ~RC32434_WTC_EN;
-                writel(readl(&wdt_reg->wtc) & val, &wdt_reg->wtc);
+        /* reset WTC timeout bit and enable WDT */
+        nand = 1 << RC32434_WTC_TO;
+        or = 1 << RC32434_WTC_EN;
 
-                val = ~RC32434_ERR_WRE;
-                writel(readl(&wdt_reg->errcs) & val, &wdt_reg->errcs);
+        SET_BITS(wdt_reg->wtc, or, nand);
+}
 
-                rc32434_wdt_device.running = 0;
-        }
+static void rc32434_wdt_stop(void)
+{
+        /* Disable WDT */
+        SET_BITS(wdt_reg->wtc, 0, 1 << RC32434_WTC_EN);
 }
 
-static void rc32434_wdt_set(int new_timeout)
+static int rc32434_wdt_set(int new_timeout)
 {
-        u32 cmp = new_timeout * HZ;
-        u32 state, val;
+        int max_to = WTCOMP2SEC((u32)-1);
 
+        if (new_timeout < 0 || new_timeout > max_to) {
+                printk(KERN_ERR KBUILD_MODNAME
+                        ": timeout value must be between 0 and %d",
+                        max_to);
+                return -EINVAL;
+        }
         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);
-}
+        writel(SEC2WTCOMP(timeout), &wdt_reg->wtcompare);
 
-static void rc32434_wdt_reset(void)
-{
-        ticks = rc32434_wdt_device.default_ticks;
+        return 0;
 }
 
-static void rc32434_wdt_update(unsigned long unused)
+static void rc32434_wdt_ping(void)
 {
-        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)
@@ -142,19 +127,23 @@ static int rc32434_wdt_open(struct inode *inode, struct file *file)
         if (nowayout)
                 __module_get(THIS_MODULE);
 
+        rc32434_wdt_start();
+        rc32434_wdt_ping();
+
         return nonseekable_open(inode, file);
 }
 
 static int rc32434_wdt_release(struct inode *inode, struct file *file)
 {
-        if (expect_close && nowayout == 0) {
+        if (expect_close == 42) {
                 rc32434_wdt_stop();
                 printk(KERN_INFO KBUILD_MODNAME ": disabling watchdog timer\n");
                 module_put(THIS_MODULE);
-        } else
+        } else {
                 printk(KERN_CRIT KBUILD_MODNAME
                         ": device closed unexpectedly. WDT will not stop !\n");
-
+                rc32434_wdt_ping();
+        }
         clear_bit(0, &rc32434_wdt_device.inuse);
         return 0;
 }
@@ -174,10 +163,10 @@ static ssize_t rc32434_wdt_write(struct file *file, const char *data,
                                 if (get_user(c, data + i))
                                         return -EFAULT;
                                 if (c == 'V')
-                                        expect_close = 1;
+                                        expect_close = 42;
                         }
                 }
-                rc32434_wdt_update(0);
+                rc32434_wdt_ping();
                 return len;
         }
         return 0;
@@ -197,11 +186,11 @@ static long rc32434_wdt_ioctl(struct file *file, unsigned int cmd,
         };
         switch (cmd) {
         case WDIOC_KEEPALIVE:
-                rc32434_wdt_reset();
+                rc32434_wdt_ping();
                 break;
         case WDIOC_GETSTATUS:
         case WDIOC_GETBOOTSTATUS:
-                value = readl(&wdt_reg->wtcount);
+                value = 0;
                 if (copy_to_user(argp, &value, sizeof(int)))
                         return -EFAULT;
                 break;
@@ -218,6 +207,7 @@ static long rc32434_wdt_ioctl(struct file *file, unsigned int cmd,
                         break;
                 case WDIOS_DISABLECARD:
                         rc32434_wdt_stop();
+                        break;
                 default:
                         return -EINVAL;
                 }
@@ -225,11 +215,9 @@ static long rc32434_wdt_ioctl(struct file *file, unsigned int cmd,
         case WDIOC_SETTIMEOUT:
                 if (copy_from_user(&new_timeout, argp, sizeof(int)))
                         return -EFAULT;
-                if (new_timeout < 1)
+                if (rc32434_wdt_set(new_timeout))
                         return -EINVAL;
-                if (new_timeout > MAX_TIMEOUT)
-                        return -EINVAL;
-                rc32434_wdt_set(new_timeout);
+                /* Fall through */
         case WDIOC_GETTIMEOUT:
                 return copy_to_user(argp, &timeout, sizeof(int));
         default:
@@ -254,15 +242,15 @@ static struct miscdevice rc32434_wdt_miscdev = {
         .fops   = &rc32434_wdt_fops,
 };
 
-static char banner[] = KERN_INFO KBUILD_MODNAME
+static char banner[] __devinitdata = KERN_INFO KBUILD_MODNAME
                 ": Watchdog Timer version " VERSION ", timer margin: %d sec\n";
 
-static int rc32434_wdt_probe(struct platform_device *pdev)
+static int __devinit rc32434_wdt_probe(struct platform_device *pdev)
 {
         int ret;
         struct resource *r;
 
-        r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rb500_wdt_res");
+        r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rb532_wdt_res");
         if (!r) {
                 printk(KERN_ERR KBUILD_MODNAME
                         "failed to retrieve resources\n");
@@ -277,24 +265,12 @@ static int rc32434_wdt_probe(struct platform_device *pdev)
         }
 
         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;
@@ -304,23 +280,17 @@ unmap:
         return ret;
 }
 
-static int rc32434_wdt_remove(struct platform_device *pdev)
+static int __devexit 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 = {
+        .remove = __devexit_p(rc32434_wdt_remove),
+        .driver = {
                 .name = "rc32434_wdt",
         }
 };