X-Git-Url: http://git.rohieb.name/openwrt.git/blobdiff_plain/17c7b6c3fdc48301e50d22cc6138ede16bd1be24..969318c24f2101c94c43067e376474e13d159dcf:/target/linux/ar7/files/drivers/char/watchdog/ar7_wdt.c diff --git a/target/linux/ar7/files/drivers/char/watchdog/ar7_wdt.c b/target/linux/ar7/files/drivers/char/watchdog/ar7_wdt.c index 50dfb5ef3..a1bbad036 100644 --- a/target/linux/ar7/files/drivers/char/watchdog/ar7_wdt.c +++ b/target/linux/ar7/files/drivers/char/watchdog/ar7_wdt.c @@ -33,11 +33,10 @@ #include #include #include +#include +#include #include -#include -#include - #include #define DRVNAME "ar7_wdt" @@ -56,60 +55,60 @@ static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close"); -typedef struct { +struct ar7_wdt { u32 kick_lock; u32 kick; u32 change_lock; - u32 change ; + u32 change; u32 disable_lock; u32 disable; u32 prescale_lock; u32 prescale; -} ar7_wdt_t; +}; static struct semaphore open_semaphore; static unsigned expect_close; /* XXX currently fixed, allows max margin ~68.72 secs */ -#define prescale_value 0xFFFF +#define prescale_value 0xffff -// Offset of the WDT registers +/* Offset of the WDT registers */ static unsigned long ar7_regs_wdt; -// Pointer to the remapped WDT IO space -static ar7_wdt_t *ar7_wdt; +/* Pointer to the remapped WDT IO space */ +static struct ar7_wdt *ar7_wdt; static void ar7_wdt_get_regs(void) { - u16 chip_id = ar7_chip_id(); - switch (chip_id) - { - case AR7_CHIP_7100: - case AR7_CHIP_7200: - ar7_regs_wdt = AR7_REGS_WDT; - break; - default: - ar7_regs_wdt = UR8_REGS_WDT; - break; - } + u16 chip_id = ar7_chip_id(); + switch (chip_id) { + case AR7_CHIP_7100: + case AR7_CHIP_7200: + ar7_regs_wdt = AR7_REGS_WDT; + break; + default: + ar7_regs_wdt = UR8_REGS_WDT; + break; + } } - + + static void ar7_wdt_kick(u32 value) { ar7_wdt->kick_lock = 0x5555; if ((ar7_wdt->kick_lock & 3) == 1) { - ar7_wdt->kick_lock = 0xAAAA; + ar7_wdt->kick_lock = 0xaaaa; if ((ar7_wdt->kick_lock & 3) == 3) { ar7_wdt->kick = value; return; } - } - printk(KERN_ERR DRVNAME ": failed to unlock WDT kick reg\n"); + } + printk(KERN_ERR DRVNAME ": failed to unlock WDT kick reg\n"); } static void ar7_wdt_prescale(u32 value) { - ar7_wdt->prescale_lock = 0x5A5A; + ar7_wdt->prescale_lock = 0x5a5a; if ((ar7_wdt->prescale_lock & 3) == 1) { - ar7_wdt->prescale_lock = 0xA5A5; + ar7_wdt->prescale_lock = 0xa5a5; if ((ar7_wdt->prescale_lock & 3) == 3) { ar7_wdt->prescale = value; return; @@ -122,7 +121,7 @@ static void ar7_wdt_change(u32 value) { ar7_wdt->change_lock = 0x6666; if ((ar7_wdt->change_lock & 3) == 1) { - ar7_wdt->change_lock = 0xBBBB; + ar7_wdt->change_lock = 0xbbbb; if ((ar7_wdt->change_lock & 3) == 3) { ar7_wdt->change = value; return; @@ -135,9 +134,9 @@ static void ar7_wdt_disable(u32 value) { ar7_wdt->disable_lock = 0x7777; if ((ar7_wdt->disable_lock & 3) == 1) { - ar7_wdt->disable_lock = 0xCCCC; + ar7_wdt->disable_lock = 0xcccc; if ((ar7_wdt->disable_lock & 3) == 2) { - ar7_wdt->disable_lock = 0xDDDD; + ar7_wdt->disable_lock = 0xdddd; if ((ar7_wdt->disable_lock & 3) == 3) { ar7_wdt->disable = value; return; @@ -153,7 +152,7 @@ static void ar7_wdt_update_margin(int new_margin) change = new_margin * (ar7_vbus_freq() / prescale_value); if (change < 1) change = 1; - if (change > 0xFFFF) change = 0xFFFF; + if (change > 0xffff) change = 0xffff; ar7_wdt_change(change); margin = change * prescale_value / ar7_vbus_freq(); printk(KERN_INFO DRVNAME @@ -187,32 +186,33 @@ static int ar7_wdt_open(struct inode *inode, struct file *file) static int ar7_wdt_release(struct inode *inode, struct file *file) { - if (!expect_close) { - printk(KERN_WARNING DRVNAME ": watchdog device closed unexpectedly, will not disable the watchdog timer\n"); - } else if (!nowayout) { + if (!expect_close) + printk(KERN_WARNING DRVNAME + ": watchdog device closed unexpectedly," + "will not disable the watchdog timer\n"); + else if (!nowayout) ar7_wdt_disable_wdt(); - } - up(&open_semaphore); + + up(&open_semaphore); return 0; } -static int ar7_wdt_notify_sys(struct notifier_block *this, +static int ar7_wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused) { if (code == SYS_HALT || code == SYS_POWER_OFF) if (!nowayout) ar7_wdt_disable_wdt(); - return NOTIFY_DONE; + return NOTIFY_DONE; } -static struct notifier_block ar7_wdt_notifier = -{ +static struct notifier_block ar7_wdt_notifier = { .notifier_call = ar7_wdt_notify_sys }; -static ssize_t ar7_wdt_write(struct file *file, const char *data, +static ssize_t ar7_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos) { if (ppos != &file->f_pos) @@ -237,21 +237,21 @@ static ssize_t ar7_wdt_write(struct file *file, const char *data, return len; } -static int ar7_wdt_ioctl(struct inode *inode, struct file *file, +static int ar7_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { static struct watchdog_info ident = { .identity = LONGNAME, - .firmware_version = 1, + .firmware_version = 1, .options = (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING), }; int new_margin; - + switch (cmd) { default: return -ENOTTY; case WDIOC_GETSUPPORT: - if(copy_to_user((struct watchdog_info *)arg, &ident, + if (copy_to_user((struct watchdog_info *)arg, &ident, sizeof(ident))) return -EFAULT; return 0; @@ -280,31 +280,33 @@ static int ar7_wdt_ioctl(struct inode *inode, struct file *file, } static struct file_operations ar7_wdt_fops = { - .owner = THIS_MODULE, - .write = ar7_wdt_write, - .ioctl = ar7_wdt_ioctl, - .open = ar7_wdt_open, - .release = ar7_wdt_release, + .owner = THIS_MODULE, + .write = ar7_wdt_write, + .ioctl = ar7_wdt_ioctl, + .open = ar7_wdt_open, + .release = ar7_wdt_release, }; static struct miscdevice ar7_wdt_miscdev = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &ar7_wdt_fops, + .minor = WATCHDOG_MINOR, + .name = "watchdog", + .fops = &ar7_wdt_fops, }; static int __init ar7_wdt_init(void) { int rc; - - ar7_wdt_get_regs(); - if (!request_mem_region(ar7_regs_wdt, sizeof(ar7_wdt_t), LONGNAME)) { + ar7_wdt_get_regs(); + + if (!request_mem_region(ar7_regs_wdt, sizeof(struct ar7_wdt), + LONGNAME)) { printk(KERN_WARNING DRVNAME ": watchdog I/O region busy\n"); return -EBUSY; } - ar7_wdt = (ar7_wdt_t *)ioremap(ar7_regs_wdt, sizeof(ar7_wdt_t)); + ar7_wdt = (struct ar7_wdt *) + ioremap(ar7_regs_wdt, sizeof(struct ar7_wdt)); ar7_wdt_disable_wdt(); ar7_wdt_prescale(prescale_value); @@ -314,31 +316,32 @@ static int __init ar7_wdt_init(void) rc = misc_register(&ar7_wdt_miscdev); if (rc) { - printk(KERN_ERR DRVNAME ": unable to register misc device\n"); + printk(KERN_ERR DRVNAME ": unable to register misc device\n"); goto out_alloc; } rc = register_reboot_notifier(&ar7_wdt_notifier); - if (rc) { - printk(KERN_ERR DRVNAME ": unable to register reboot notifier\n"); + if (rc) { + printk(KERN_ERR DRVNAME + ": unable to register reboot notifier\n"); goto out_register; - } + } goto out; out_register: misc_deregister(&ar7_wdt_miscdev); out_alloc: - release_mem_region(ar7_regs_wdt, sizeof(ar7_wdt_t)); + release_mem_region(ar7_regs_wdt, sizeof(struct ar7_wdt)); out: return rc; } static void __exit ar7_wdt_cleanup(void) { - unregister_reboot_notifier(&ar7_wdt_notifier); + unregister_reboot_notifier(&ar7_wdt_notifier); misc_deregister(&ar7_wdt_miscdev); - iounmap(ar7_wdt); - release_mem_region(ar7_regs_wdt, sizeof(ar7_wdt_t)); + iounmap(ar7_wdt); + release_mem_region(ar7_regs_wdt, sizeof(struct ar7_wdt)); } module_init(ar7_wdt_init);