[WATCHDOG] powerpc: pika_wdt ident cannot be const
[linux-2.6.git] / drivers / watchdog / w83627hf_wdt.c
index df33b3b..0f5288d 100644 (file)
@@ -11,8 +11,8 @@
  *
  *     (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
  *
- *     (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
- *                             http://www.redhat.com
+ *     (c) Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>,
+ *                                             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
@@ -23,7 +23,7 @@
  *     warranty for any of this software. This material is provided
  *     "AS-IS" and at no charge.
  *
- *     (c) Copyright 1995    Alan Cox <alan@redhat.com>
+ *     (c) Copyright 1995    Alan Cox <alan@lxorguk.ukuu.org.uk>
  */
 
 #include <linux/module.h>
@@ -37,9 +37,9 @@
 #include <linux/reboot.h>
 #include <linux/init.h>
 #include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
 
-#include <asm/io.h>
-#include <asm/uaccess.h>
 #include <asm/system.h>
 
 #define WATCHDOG_NAME "w83627hf/thf/hg WDT"
@@ -48,7 +48,7 @@
 
 static unsigned long wdt_is_open;
 static char expect_close;
-static spinlock_t io_lock;
+static DEFINE_SPINLOCK(io_lock);
 
 /* You must set this - there is no sane way to probe for this board. */
 static int wdt_io = 0x2E;
@@ -57,22 +57,26 @@ MODULE_PARM_DESC(wdt_io, "w83627hf/thf WDT io port (default 0x2E)");
 
 static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
 module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
+MODULE_PARM_DESC(timeout,
+               "Watchdog timeout in seconds. 1 <= timeout <= 255, default="
+                               __MODULE_STRING(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) ")");
+MODULE_PARM_DESC(nowayout,
+               "Watchdog cannot be stopped once started (default="
+                               __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
 
 /*
  *     Kernel methods.
  */
 
 #define WDT_EFER (wdt_io+0)   /* Extended Function Enable Registers */
-#define WDT_EFIR (wdt_io+0)   /* Extended Function Index Register (same as EFER) */
+#define WDT_EFIR (wdt_io+0)   /* Extended Function Index Register
+                                                       (same as EFER) */
 #define WDT_EFDR (WDT_EFIR+1) /* Extended Function Data Register */
 
-static void
-w83627hf_select_wd_register(void)
+static void w83627hf_select_wd_register(void)
 {
        unsigned char c;
        outb_p(0x87, WDT_EFER); /* Enter extended function mode */
@@ -85,6 +89,11 @@ w83627hf_select_wd_register(void)
                c = ((inb_p(WDT_EFDR) & 0xf7) | 0x04); /* select WDT0 */
                outb_p(0x2b, WDT_EFER);
                outb_p(c, WDT_EFDR);    /* set GPIO3 to WDT0 */
+       } else if (c == 0x88) { /* W83627EHF */
+               outb_p(0x2d, WDT_EFER); /* select GPIO5 */
+               c = inb_p(WDT_EFDR) & ~0x01; /* PIN77 -> WDT0# */
+               outb_p(0x2d, WDT_EFER);
+               outb_p(c, WDT_EFDR); /* set GPIO5 to WDT0 */
        }
 
        outb_p(0x07, WDT_EFER); /* point to logical device number reg */
@@ -93,43 +102,45 @@ w83627hf_select_wd_register(void)
        outb_p(0x01, WDT_EFDR); /* set bit 0 to activate GPIO2 */
 }
 
-static void
-w83627hf_unselect_wd_register(void)
+static void w83627hf_unselect_wd_register(void)
 {
        outb_p(0xAA, WDT_EFER); /* Leave extended function mode */
 }
 
 /* tyan motherboards seem to set F5 to 0x4C ?
  * So explicitly init to appropriate value. */
-static void
-w83627hf_init(void)
+
+static void w83627hf_init(void)
 {
        unsigned char t;
 
        w83627hf_select_wd_register();
 
        outb_p(0xF6, WDT_EFER); /* Select CRF6 */
-       t=inb_p(WDT_EFDR);      /* read CRF6 */
+       t = inb_p(WDT_EFDR);      /* read CRF6 */
        if (t != 0) {
-               printk (KERN_INFO PFX "Watchdog already running. Resetting timeout to %d sec\n", timeout);
+               printk(KERN_INFO PFX
+                    "Watchdog already running. Resetting timeout to %d sec\n",
+                                                               timeout);
                outb_p(timeout, WDT_EFDR);    /* Write back to CRF6 */
        }
 
        outb_p(0xF5, WDT_EFER); /* Select CRF5 */
-       t=inb_p(WDT_EFDR);      /* read CRF5 */
-       t&=~0x0C;               /* set second mode & disable keyboard turning off watchdog */
+       t = inb_p(WDT_EFDR);      /* read CRF5 */
+       t &= ~0x0C;               /* set second mode & disable keyboard
+                                   turning off watchdog */
        outb_p(t, WDT_EFDR);    /* Write back to CRF5 */
 
        outb_p(0xF7, WDT_EFER); /* Select CRF7 */
-       t=inb_p(WDT_EFDR);      /* read CRF7 */
-       t&=~0xC0;               /* disable keyboard & mouse turning off watchdog */
+       t = inb_p(WDT_EFDR);      /* read CRF7 */
+       t &= ~0xC0;               /* disable keyboard & mouse turning off
+                                   watchdog */
        outb_p(t, WDT_EFDR);    /* Write back to CRF7 */
 
        w83627hf_unselect_wd_register();
 }
 
-static void
-wdt_ctrl(int timeout)
+static void wdt_ctrl(int timeout)
 {
        spin_lock(&io_lock);
 
@@ -143,32 +154,28 @@ wdt_ctrl(int timeout)
        spin_unlock(&io_lock);
 }
 
-static int
-wdt_ping(void)
+static int wdt_ping(void)
 {
        wdt_ctrl(timeout);
        return 0;
 }
 
-static int
-wdt_disable(void)
+static int wdt_disable(void)
 {
        wdt_ctrl(0);
        return 0;
 }
 
-static int
-wdt_set_heartbeat(int t)
+static int wdt_set_heartbeat(int t)
 {
-       if ((t < 1) || (t > 255))
+       if (t < 1 || t > 255)
                return -EINVAL;
-
        timeout = t;
        return 0;
 }
 
-static ssize_t
-wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t wdt_write(struct file *file, const char __user *buf,
+                                               size_t count, loff_t *ppos)
 {
        if (count) {
                if (!nowayout) {
@@ -178,7 +185,7 @@ wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 
                        for (i = 0; i != count; i++) {
                                char c;
-                               if (get_user(c, buf+i))
+                               if (get_user(c, buf + i))
                                        return -EFAULT;
                                if (c == 'V')
                                        expect_close = 42;
@@ -189,72 +196,61 @@ wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
        return count;
 }
 
-static int
-wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
-         unsigned long arg)
+static long wdt_ioctl(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_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+       static const struct watchdog_info ident = {
+               .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
+                                                       WDIOF_MAGICCLOSE,
                .firmware_version = 1,
                .identity = "W83627HF WDT",
        };
 
        switch (cmd) {
        case WDIOC_GETSUPPORT:
-         if (copy_to_user(argp, &ident, sizeof(ident)))
-           return -EFAULT;
-         break;
-
+               if (copy_to_user(argp, &ident, sizeof(ident)))
+                       return -EFAULT;
+               break;
        case WDIOC_GETSTATUS:
        case WDIOC_GETBOOTSTATUS:
-         return put_user(0, p);
-
-       case WDIOC_KEEPALIVE:
-         wdt_ping();
-         break;
-
-       case WDIOC_SETTIMEOUT:
-         if (get_user(new_timeout, p))
-                 return -EFAULT;
-         if (wdt_set_heartbeat(new_timeout))
-                 return -EINVAL;
-         wdt_ping();
-         /* Fall */
-
-       case WDIOC_GETTIMEOUT:
-         return put_user(timeout, p);
-
+               return put_user(0, p);
        case WDIOC_SETOPTIONS:
        {
-         int options, retval = -EINVAL;
-
-         if (get_user(options, p))
-           return -EFAULT;
-
-         if (options & WDIOS_DISABLECARD) {
-           wdt_disable();
-           retval = 0;
-         }
-
-         if (options & WDIOS_ENABLECARD) {
-           wdt_ping();
-           retval = 0;
-         }
+               int options, retval = -EINVAL;
 
-         return retval;
+               if (get_user(options, p))
+                       return -EFAULT;
+               if (options & WDIOS_DISABLECARD) {
+                       wdt_disable();
+                       retval = 0;
+               }
+               if (options & WDIOS_ENABLECARD) {
+                       wdt_ping();
+                       retval = 0;
+               }
+               return retval;
        }
-
+       case WDIOC_KEEPALIVE:
+               wdt_ping();
+               break;
+       case WDIOC_SETTIMEOUT:
+               if (get_user(new_timeout, p))
+                       return -EFAULT;
+               if (wdt_set_heartbeat(new_timeout))
+                       return -EINVAL;
+               wdt_ping();
+               /* Fall */
+       case WDIOC_GETTIMEOUT:
+               return put_user(timeout, p);
        default:
-         return -ENOTTY;
+               return -ENOTTY;
        }
        return 0;
 }
 
-static int
-wdt_open(struct inode *inode, struct file *file)
+static int wdt_open(struct inode *inode, struct file *file)
 {
        if (test_and_set_bit(0, &wdt_is_open))
                return -EBUSY;
@@ -266,13 +262,13 @@ wdt_open(struct inode *inode, struct file *file)
        return nonseekable_open(inode, file);
 }
 
-static int
-wdt_close(struct inode *inode, struct file *file)
+static int wdt_close(struct inode *inode, struct file *file)
 {
-       if (expect_close == 42) {
+       if (expect_close == 42)
                wdt_disable();
-       } else {
-               printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+       else {
+               printk(KERN_CRIT PFX
+                       "Unexpected close, not stopping watchdog!\n");
                wdt_ping();
        }
        expect_close = 0;
@@ -284,14 +280,12 @@ wdt_close(struct inode *inode, struct file *file)
  *     Notifier for system down
  */
 
-static int
-wdt_notify_sys(struct notifier_block *this, unsigned long code,
+static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
        void *unused)
 {
-       if (code == SYS_DOWN || code == SYS_HALT) {
-               /* Turn the WDT off */
-               wdt_disable();
-       }
+       if (code == SYS_DOWN || code == SYS_HALT)
+               wdt_disable();  /* Turn the WDT off */
+
        return NOTIFY_DONE;
 }
 
@@ -303,7 +297,7 @@ static const struct file_operations wdt_fops = {
        .owner          = THIS_MODULE,
        .llseek         = no_llseek,
        .write          = wdt_write,
-       .ioctl          = wdt_ioctl,
+       .unlocked_ioctl = wdt_ioctl,
        .open           = wdt_open,
        .release        = wdt_close,
 };
@@ -323,23 +317,21 @@ static struct notifier_block wdt_notifier = {
        .notifier_call = wdt_notify_sys,
 };
 
-static int __init
-wdt_init(void)
+static int __init wdt_init(void)
 {
        int ret;
 
-       spin_lock_init(&io_lock);
-
        printk(KERN_INFO "WDT driver for the Winbond(TM) W83627HF/THF/HG Super I/O chip initialising.\n");
 
        if (wdt_set_heartbeat(timeout)) {
                wdt_set_heartbeat(WATCHDOG_TIMEOUT);
-               printk (KERN_INFO PFX "timeout value must be 1<=timeout<=255, using %d\n",
-                       WATCHDOG_TIMEOUT);
+               printk(KERN_INFO PFX
+                    "timeout value must be 1 <= timeout <= 255, using %d\n",
+                               WATCHDOG_TIMEOUT);
        }
 
        if (!request_region(wdt_io, 1, WATCHDOG_NAME)) {
-               printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+               printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
                        wdt_io);
                ret = -EIO;
                goto out;
@@ -349,20 +341,22 @@ wdt_init(void)
 
        ret = register_reboot_notifier(&wdt_notifier);
        if (ret != 0) {
-               printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
-                       ret);
+               printk(KERN_ERR PFX
+                       "cannot register reboot notifier (err=%d)\n", ret);
                goto unreg_regions;
        }
 
        ret = misc_register(&wdt_miscdev);
        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 miscdev on minor=%d (err=%d)\n",
+                                                       WATCHDOG_MINOR, ret);
                goto unreg_reboot;
        }
 
-       printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
-               timeout, nowayout);
+       printk(KERN_INFO PFX
+                       "initialized. timeout=%d sec (nowayout=%d)\n",
+                                                       timeout, nowayout);
 
 out:
        return ret;
@@ -373,12 +367,11 @@ unreg_regions:
        goto out;
 }
 
-static void __exit
-wdt_exit(void)
+static void __exit wdt_exit(void)
 {
        misc_deregister(&wdt_miscdev);
        unregister_reboot_notifier(&wdt_notifier);
-       release_region(wdt_io,1);
+       release_region(wdt_io, 1);
 }
 
 module_init(wdt_init);