diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-08-20 12:39:18 +0200 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-08-20 12:39:18 +0200 |
commit | 170465ee7f5a9a2d0ac71285507e52642e040353 (patch) | |
tree | dbca81f04cde9e625170abbd6a72555cfbeb194e /drivers/watchdog/w83977f_wdt.c | |
parent | 169ad16bb87c10a3f7c108bb7008ebc0270f617a (diff) | |
parent | 1fca25427482387689fa27594c992a961d98768f (diff) |
Merge branch 'linus' into x86/xen
Diffstat (limited to 'drivers/watchdog/w83977f_wdt.c')
-rw-r--r-- | drivers/watchdog/w83977f_wdt.c | 239 |
1 files changed, 118 insertions, 121 deletions
diff --git a/drivers/watchdog/w83977f_wdt.c b/drivers/watchdog/w83977f_wdt.c index b209bcd7f78..2525da5080c 100644 --- a/drivers/watchdog/w83977f_wdt.c +++ b/drivers/watchdog/w83977f_wdt.c @@ -26,10 +26,10 @@ #include <linux/watchdog.h> #include <linux/notifier.h> #include <linux/reboot.h> +#include <linux/uaccess.h> +#include <linux/io.h> -#include <asm/io.h> #include <asm/system.h> -#include <asm/uaccess.h> #define WATCHDOG_VERSION "1.00" #define WATCHDOG_NAME "W83977F WDT" @@ -53,13 +53,17 @@ static char expect_close; static DEFINE_SPINLOCK(spinlock); module_param(timeout, int, 0); -MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (15..7635), default=" __MODULE_STRING(DEFAULT_TIMEOUT) ")"); +MODULE_PARM_DESC(timeout, + "Watchdog timeout in seconds (15..7635), default=" + __MODULE_STRING(DEFAULT_TIMEOUT) ")"); module_param(testmode, int, 0); -MODULE_PARM_DESC(testmode,"Watchdog testmode (1 = no reboot), default=0"); +MODULE_PARM_DESC(testmode, "Watchdog testmode (1 = no reboot), default=0"); 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) ")"); /* * Start the watchdog @@ -72,8 +76,8 @@ static int wdt_start(void) spin_lock_irqsave(&spinlock, flags); /* Unlock the SuperIO chip */ - outb_p(UNLOCK_DATA,IO_INDEX_PORT); - outb_p(UNLOCK_DATA,IO_INDEX_PORT); + outb_p(UNLOCK_DATA, IO_INDEX_PORT); + outb_p(UNLOCK_DATA, IO_INDEX_PORT); /* * Select device Aux2 (device=8) to set watchdog regs F2, F3 and F4. @@ -81,50 +85,49 @@ static int wdt_start(void) * F3 is set to enable watchdog LED blink at timeout. * F4 is used to just clear the TIMEOUT'ed state (bit 0). */ - outb_p(DEVICE_REGISTER,IO_INDEX_PORT); - outb_p(0x08,IO_DATA_PORT); - outb_p(0xF2,IO_INDEX_PORT); - outb_p(timeoutW,IO_DATA_PORT); - outb_p(0xF3,IO_INDEX_PORT); - outb_p(0x08,IO_DATA_PORT); - outb_p(0xF4,IO_INDEX_PORT); - outb_p(0x00,IO_DATA_PORT); + outb_p(DEVICE_REGISTER, IO_INDEX_PORT); + outb_p(0x08, IO_DATA_PORT); + outb_p(0xF2, IO_INDEX_PORT); + outb_p(timeoutW, IO_DATA_PORT); + outb_p(0xF3, IO_INDEX_PORT); + outb_p(0x08, IO_DATA_PORT); + outb_p(0xF4, IO_INDEX_PORT); + outb_p(0x00, IO_DATA_PORT); /* Set device Aux2 active */ - outb_p(0x30,IO_INDEX_PORT); - outb_p(0x01,IO_DATA_PORT); + outb_p(0x30, IO_INDEX_PORT); + outb_p(0x01, IO_DATA_PORT); - /* + /* * Select device Aux1 (dev=7) to set GP16 as the watchdog output * (in reg E6) and GP13 as the watchdog LED output (in reg E3). * Map GP16 at pin 119. * In test mode watch the bit 0 on F4 to indicate "triggered" or * check watchdog LED on SBC. */ - outb_p(DEVICE_REGISTER,IO_INDEX_PORT); - outb_p(0x07,IO_DATA_PORT); - if (!testmode) - { + outb_p(DEVICE_REGISTER, IO_INDEX_PORT); + outb_p(0x07, IO_DATA_PORT); + if (!testmode) { unsigned pin_map; - outb_p(0xE6,IO_INDEX_PORT); - outb_p(0x0A,IO_DATA_PORT); - outb_p(0x2C,IO_INDEX_PORT); + outb_p(0xE6, IO_INDEX_PORT); + outb_p(0x0A, IO_DATA_PORT); + outb_p(0x2C, IO_INDEX_PORT); pin_map = inb_p(IO_DATA_PORT); pin_map |= 0x10; pin_map &= ~(0x20); - outb_p(0x2C,IO_INDEX_PORT); - outb_p(pin_map,IO_DATA_PORT); + outb_p(0x2C, IO_INDEX_PORT); + outb_p(pin_map, IO_DATA_PORT); } - outb_p(0xE3,IO_INDEX_PORT); - outb_p(0x08,IO_DATA_PORT); + outb_p(0xE3, IO_INDEX_PORT); + outb_p(0x08, IO_DATA_PORT); /* Set device Aux1 active */ - outb_p(0x30,IO_INDEX_PORT); - outb_p(0x01,IO_DATA_PORT); + outb_p(0x30, IO_INDEX_PORT); + outb_p(0x01, IO_DATA_PORT); /* Lock the SuperIO chip */ - outb_p(LOCK_DATA,IO_INDEX_PORT); + outb_p(LOCK_DATA, IO_INDEX_PORT); spin_unlock_irqrestore(&spinlock, flags); @@ -144,42 +147,41 @@ static int wdt_stop(void) spin_lock_irqsave(&spinlock, flags); /* Unlock the SuperIO chip */ - outb_p(UNLOCK_DATA,IO_INDEX_PORT); - outb_p(UNLOCK_DATA,IO_INDEX_PORT); + outb_p(UNLOCK_DATA, IO_INDEX_PORT); + outb_p(UNLOCK_DATA, IO_INDEX_PORT); - /* + /* * Select device Aux2 (device=8) to set watchdog regs F2, F3 and F4. * F2 is reset to its default value (watchdog timer disabled). * F3 is reset to its default state. * F4 clears the TIMEOUT'ed state (bit 0) - back to default. */ - 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); + 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); /* - * Select device Aux1 (dev=7) to set GP16 (in reg E6) and + * Select device Aux1 (dev=7) to set GP16 (in reg E6) and * Gp13 (in reg E3) as inputs. */ - outb_p(DEVICE_REGISTER,IO_INDEX_PORT); - outb_p(0x07,IO_DATA_PORT); - if (!testmode) - { - outb_p(0xE6,IO_INDEX_PORT); - outb_p(0x01,IO_DATA_PORT); + outb_p(DEVICE_REGISTER, IO_INDEX_PORT); + outb_p(0x07, IO_DATA_PORT); + if (!testmode) { + outb_p(0xE6, IO_INDEX_PORT); + outb_p(0x01, IO_DATA_PORT); } - outb_p(0xE3,IO_INDEX_PORT); - outb_p(0x01,IO_DATA_PORT); + outb_p(0xE3, IO_INDEX_PORT); + outb_p(0x01, IO_DATA_PORT); /* Lock the SuperIO chip */ - outb_p(LOCK_DATA,IO_INDEX_PORT); + outb_p(LOCK_DATA, IO_INDEX_PORT); spin_unlock_irqrestore(&spinlock, flags); @@ -200,17 +202,17 @@ static int wdt_keepalive(void) spin_lock_irqsave(&spinlock, flags); /* Unlock the SuperIO chip */ - outb_p(UNLOCK_DATA,IO_INDEX_PORT); - outb_p(UNLOCK_DATA,IO_INDEX_PORT); + outb_p(UNLOCK_DATA, IO_INDEX_PORT); + outb_p(UNLOCK_DATA, IO_INDEX_PORT); /* Select device Aux2 (device=8) to kick watchdog reg F2 */ - outb_p(DEVICE_REGISTER,IO_INDEX_PORT); - outb_p(0x08,IO_DATA_PORT); - outb_p(0xF2,IO_INDEX_PORT); - outb_p(timeoutW,IO_DATA_PORT); + outb_p(DEVICE_REGISTER, IO_INDEX_PORT); + outb_p(0x08, IO_DATA_PORT); + outb_p(0xF2, IO_INDEX_PORT); + outb_p(timeoutW, IO_DATA_PORT); /* Lock the SuperIO chip */ - outb_p(LOCK_DATA,IO_INDEX_PORT); + outb_p(LOCK_DATA, IO_INDEX_PORT); spin_unlock_irqrestore(&spinlock, flags); @@ -227,7 +229,7 @@ static int wdt_set_timeout(int t) /* * Convert seconds to watchdog counter time units, rounding up. - * On PCM-5335 watchdog units are 30 seconds/step with 15 sec startup + * On PCM-5335 watchdog units are 30 seconds/step with 15 sec startup * value. This information is supplied in the PCM-5335 manual and was * checked by me on a real board. This is a bit strange because W83977f * datasheet says counter unit is in minutes! @@ -241,7 +243,7 @@ static int wdt_set_timeout(int t) return -EINVAL; /* - * timeout is the timeout in seconds, + * timeout is the timeout in seconds, * timeoutW is the timeout in watchdog counter units. */ timeoutW = tmrval; @@ -261,17 +263,17 @@ static int wdt_get_status(int *status) spin_lock_irqsave(&spinlock, flags); /* Unlock the SuperIO chip */ - outb_p(UNLOCK_DATA,IO_INDEX_PORT); - outb_p(UNLOCK_DATA,IO_INDEX_PORT); + outb_p(UNLOCK_DATA, IO_INDEX_PORT); + outb_p(UNLOCK_DATA, IO_INDEX_PORT); /* Select device Aux2 (device=8) to read watchdog reg F4 */ - outb_p(DEVICE_REGISTER,IO_INDEX_PORT); - outb_p(0x08,IO_DATA_PORT); - outb_p(0xF4,IO_INDEX_PORT); + 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_p(LOCK_DATA,IO_INDEX_PORT); + outb_p(LOCK_DATA, IO_INDEX_PORT); spin_unlock_irqrestore(&spinlock, flags); @@ -290,7 +292,7 @@ static int wdt_get_status(int *status) static int wdt_open(struct inode *inode, struct file *file) { /* If the watchdog is alive we don't need to start it again */ - if( test_and_set_bit(0, &timer_alive) ) + if (test_and_set_bit(0, &timer_alive)) return -EBUSY; if (nowayout) @@ -306,13 +308,13 @@ static int wdt_release(struct inode *inode, struct file *file) * Shut off the timer. * Lock it in if it's a module and we set nowayout */ - if (expect_close == 42) - { + if (expect_close == 42) { wdt_stop(); clear_bit(0, &timer_alive); } else { wdt_keepalive(); - printk(KERN_CRIT PFX "unexpected close, not stopping watchdog!\n"); + printk(KERN_CRIT PFX + "unexpected close, not stopping watchdog!\n"); } expect_close = 0; return 0; @@ -333,24 +335,22 @@ static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { /* See if we got the magic character 'V' and reload the timer */ - if(count) - { - if (!nowayout) - { + if (count) { + if (!nowayout) { size_t ofs; - /* note: just in case someone wrote the magic character long ago */ + /* note: just in case someone wrote the + magic character long ago */ expect_close = 0; - /* scan to see whether or not we got the magic character */ - for(ofs = 0; ofs != count; ofs++) - { + /* scan to see whether or not we got the + magic character */ + for (ofs = 0; ofs != count; ofs++) { char c; if (get_user(c, buf + ofs)) return -EFAULT; - if (c == 'V') { + if (c == 'V') expect_close = 42; - } } } @@ -377,8 +377,7 @@ static struct watchdog_info ident = { .identity = WATCHDOG_NAME, }; -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) { int status; int new_options, retval = -EINVAL; @@ -390,13 +389,10 @@ static int wdt_ioctl(struct inode *inode, struct file *file, uarg.i = (int __user *)arg; - switch(cmd) - { - default: - return -ENOTTY; - + switch (cmd) { case WDIOC_GETSUPPORT: - return copy_to_user(uarg.ident, &ident, sizeof(ident)) ? -EFAULT : 0; + return copy_to_user(uarg.ident, &ident, + sizeof(ident)) ? -EFAULT : 0; case WDIOC_GETSTATUS: wdt_get_status(&status); @@ -405,12 +401,8 @@ static int wdt_ioctl(struct inode *inode, struct file *file, case WDIOC_GETBOOTSTATUS: return put_user(0, uarg.i); - case WDIOC_KEEPALIVE: - wdt_keepalive(); - return 0; - case WDIOC_SETOPTIONS: - if (get_user (new_options, uarg.i)) + if (get_user(new_options, uarg.i)) return -EFAULT; if (new_options & WDIOS_DISABLECARD) { @@ -425,6 +417,10 @@ static int wdt_ioctl(struct inode *inode, struct file *file, return retval; + case WDIOC_KEEPALIVE: + wdt_keepalive(); + return 0; + case WDIOC_SETTIMEOUT: if (get_user(new_timeout, uarg.i)) return -EFAULT; @@ -438,29 +434,30 @@ static int wdt_ioctl(struct inode *inode, struct file *file, case WDIOC_GETTIMEOUT: return put_user(timeout, uarg.i); + default: + return -ENOTTY; + } } static int wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused) { - if (code==SYS_DOWN || code==SYS_HALT) + if (code == SYS_DOWN || code == SYS_HALT) wdt_stop(); return NOTIFY_DONE; } -static const struct file_operations wdt_fops= -{ +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_release, }; -static struct miscdevice wdt_miscdev= -{ +static struct miscdevice wdt_miscdev = { .minor = WATCHDOG_MINOR, .name = "watchdog", .fops = &wdt_fops, @@ -474,20 +471,20 @@ static int __init w83977f_wdt_init(void) { int rc; - printk(KERN_INFO PFX DRIVER_VERSION); + printk(KERN_INFO PFX DRIVER_VERSION); /* - * Check that the timeout value is within it's range ; + * Check that the timeout value is within it's range; * if not reset to the default */ if (wdt_set_timeout(timeout)) { wdt_set_timeout(DEFAULT_TIMEOUT); - printk(KERN_INFO PFX "timeout value must be 15<=timeout<=7635, using %d\n", - DEFAULT_TIMEOUT); + printk(KERN_INFO PFX + "timeout value must be 15 <= timeout <= 7635, using %d\n", + DEFAULT_TIMEOUT); } - if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME)) - { + 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; @@ -495,30 +492,30 @@ static int __init w83977f_wdt_init(void) } rc = register_reboot_notifier(&wdt_notifier); - if (rc) - { - printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", - rc); + if (rc) { + printk(KERN_ERR PFX + "cannot register reboot notifier (err=%d)\n", rc); goto err_out_region; } rc = misc_register(&wdt_miscdev); - if (rc) - { - printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - wdt_miscdev.minor, rc); + if (rc) { + 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", - timeout, nowayout, testmode); + printk(KERN_INFO PFX + "initialized. timeout=%d sec (nowayout=%d testmode=%d)\n", + timeout, nowayout, testmode); return 0; err_out_reboot: unregister_reboot_notifier(&wdt_notifier); err_out_region: - release_region(IO_INDEX_PORT,2); + release_region(IO_INDEX_PORT, 2); err_out: return rc; } @@ -528,7 +525,7 @@ static void __exit w83977f_wdt_exit(void) wdt_stop(); misc_deregister(&wdt_miscdev); unregister_reboot_notifier(&wdt_notifier); - release_region(IO_INDEX_PORT,2); + release_region(IO_INDEX_PORT, 2); } module_init(w83977f_wdt_init); |