static long rdc321x_wdt_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
void __user *argp = (void __user *)arg;
unsigned int value;
static struct watchdog_info ident = {
.options = WDIOF_CARDRESET,
.identity = "RDC321x WDT",
};
unsigned long flags;
switch (cmd) {
case WDIOC_KEEPALIVE:
rdc321x_wdt_reset();
break;
case WDIOC_GETSTATUS:
/* Read the value from the DATA register */
spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
value = inl(RDC3210_CFGREG_DATA);
spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
if (copy_to_user(argp, &value, sizeof(int)))
return -EFAULT;
break;
case WDIOC_GETSUPPORT:
if (copy_to_user(argp, &ident, sizeof(ident)))
return -EFAULT;
break;
case WDIOC_SETOPTIONS:
if (copy_from_user(&value, argp, sizeof(int)))
return -EFAULT;
switch (value) {
case WDIOS_ENABLECARD:
rdc321x_wdt_start();
break;
case WDIOS_DISABLECARD:
return rdc321x_wdt_stop();
default:
return -EINVAL;
}
break;
default:
return -ENOTTY;
}
return 0;
}
static ssize_t rdc321x_wdt_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
if (!count)
return -EIO;
rdc321x_wdt_reset();
return count;
}
static const struct file_operations rdc321x_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.unlocked_ioctl = rdc321x_wdt_ioctl,
.open = rdc321x_wdt_open,
.write = rdc321x_wdt_write,
.release = rdc321x_wdt_release,
};
static struct miscdevice rdc321x_wdt_misc = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &rdc321x_wdt_fops,
};
static int __devinit rdc321x_wdt_probe(struct platform_device *pdev)
{
int err;
err = misc_register(&rdc321x_wdt_misc);
if (err < 0) {
printk(KERN_ERR PFX "watchdog misc_register failed\n");
return err;
}
spin_lock_init(&rdc321x_wdt_device.lock);
/* Reset the watchdog */
outl(RDC_WDT_RST, RDC3210_CFGREG_DATA);
init_completion(&rdc321x_wdt_device.stop);
rdc321x_wdt_device.queue = 0;
clear_bit(0, &rdc321x_wdt_device.inuse);
setup_timer(&rdc321x_wdt_device.timer, rdc321x_wdt_trigger, 0);
rdc321x_wdt_device.default_ticks = ticks;
printk(KERN_INFO PFX "watchdog init success\n");
return 0;
}
static int rdc321x_wdt_remove(struct platform_device *pdev)
{
if (rdc321x_wdt_device.queue) {
rdc321x_wdt_device.queue = 0;
wait_for_completion(&rdc321x_wdt_device.stop);
}
misc_deregister(&rdc321x_wdt_misc);
return 0;
}
static struct platform_driver rdc321x_wdt_driver = {
.probe = rdc321x_wdt_probe,
.remove = rdc321x_wdt_remove,
.driver = {
.owner = THIS_MODULE,
.name = "rdc321x-wdt",
},
};
static int __init rdc321x_wdt_init(void)
{
return platform_driver_register(&rdc321x_wdt_driver);
}
static void __exit rdc321x_wdt_exit(void)
{
platform_driver_unregister(&rdc321x_wdt_driver);
}
static long rdc321x_wdt_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
void __user *argp = (void __user *)arg;
u32 value;
static const struct watchdog_info ident = {
.options = WDIOF_CARDRESET,
.identity = "RDC321x WDT",
};
unsigned long flags;
switch (cmd) {
case WDIOC_KEEPALIVE:
rdc321x_wdt_reset();
break;
case WDIOC_GETSTATUS:
/* */
spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
pci_read_config_dword(rdc321x_wdt_device.sb_pdev,
rdc321x_wdt_device.base_reg, &value);
spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
if (copy_to_user(argp, &value, sizeof(u32)))
return -EFAULT;
break;
case WDIOC_GETSUPPORT:
if (copy_to_user(argp, &ident, sizeof(ident)))
return -EFAULT;
break;
case WDIOC_SETOPTIONS:
if (copy_from_user(&value, argp, sizeof(int)))
return -EFAULT;
switch (value) {
case WDIOS_ENABLECARD:
rdc321x_wdt_start();
break;
case WDIOS_DISABLECARD:
return rdc321x_wdt_stop();
default:
return -EINVAL;
}
break;
default:
return -ENOTTY;
}
return 0;
}
static ssize_t rdc321x_wdt_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
if (!count)
return -EIO;
rdc321x_wdt_reset();
return count;
}
static const struct file_operations rdc321x_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.unlocked_ioctl = rdc321x_wdt_ioctl,
.open = rdc321x_wdt_open,
.write = rdc321x_wdt_write,
.release = rdc321x_wdt_release,
};
static struct miscdevice rdc321x_wdt_misc = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &rdc321x_wdt_fops,
};
static int __devinit rdc321x_wdt_probe(struct platform_device *pdev)
{
int err;
struct resource *r;
struct rdc321x_wdt_pdata *pdata;
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "no platform data supplied\n");
return -ENODEV;
}
r = platform_get_resource_byname(pdev, IORESOURCE_IO, "wdt-reg");
if (!r) {
dev_err(&pdev->dev, "failed to get wdt-reg resource\n");
return -ENODEV;
}
rdc321x_wdt_device.sb_pdev = pdata->sb_pdev;
rdc321x_wdt_device.base_reg = r->start;
err = misc_register(&rdc321x_wdt_misc);
if (err < 0) {
dev_err(&pdev->dev, "misc_register failed\n");
return err;
}
spin_lock_init(&rdc321x_wdt_device.lock);
/* */
pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
rdc321x_wdt_device.base_reg, RDC_WDT_RST);
init_completion(&rdc321x_wdt_device.stop);
rdc321x_wdt_device.queue = 0;
clear_bit(0, &rdc321x_wdt_device.inuse);
setup_timer(&rdc321x_wdt_device.timer, rdc321x_wdt_trigger, 0);
rdc321x_wdt_device.default_ticks = ticks;
dev_info(&pdev->dev, "watchdog init success\n");
return 0;
}
static int __devexit rdc321x_wdt_remove(struct platform_device *pdev)
{
if (rdc321x_wdt_device.queue) {
rdc321x_wdt_device.queue = 0;
wait_for_completion(&rdc321x_wdt_device.stop);
}
misc_deregister(&rdc321x_wdt_misc);
return 0;
}
static struct platform_driver rdc321x_wdt_driver = {
.probe = rdc321x_wdt_probe,
.remove = __devexit_p(rdc321x_wdt_remove),
.driver = {
.owner = THIS_MODULE,
.name = "rdc321x-wdt",
},
};
module_platform_driver(rdc321x_wdt_driver);
MODULE_AUTHOR("Florian Fainelli <*****@*****.**>");
MODULE_DESCRIPTION("RDC321x watchdog driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);