int geode_mfgpt_set_irq(int timer, int cmp, int irq, int enable)
{
u32 val, dummy;
int offset;
if (timer < 0 || timer >= MFGPT_MAX_TIMERS)
return -EIO;
if (geode_mfgpt_toggle_event(timer, cmp, MFGPT_EVENT_IRQ, enable))
return -EIO;
rdmsr(MSR_PIC_ZSEL_LOW, val, dummy);
offset = (timer % 4) * 4;
val &= ~((0xF << offset) | (0xF << (offset + 16)));
if (enable) {
val |= (irq & 0x0F) << (offset);
val |= (irq & 0x0F) << (offset + 16);
}
wrmsr(MSR_PIC_ZSEL_LOW, val, dummy);
return 0;
}
static long geodewdt_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
int interval;
static struct watchdog_info ident = {
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING
| WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = WATCHDOG_NAME,
};
switch (cmd) {
case WDIOC_GETSUPPORT:
return copy_to_user(argp, &ident,
sizeof(ident)) ? -EFAULT : 0;
break;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
return put_user(0, p);
case WDIOC_SETOPTIONS:
{
int options, ret = -EINVAL;
if (get_user(options, p))
return -EFAULT;
if (options & WDIOS_DISABLECARD) {
geodewdt_disable();
ret = 0;
}
if (options & WDIOS_ENABLECARD) {
geodewdt_ping();
ret = 0;
}
return ret;
}
case WDIOC_KEEPALIVE:
geodewdt_ping();
return 0;
case WDIOC_SETTIMEOUT:
if (get_user(interval, p))
return -EFAULT;
if (geodewdt_set_heartbeat(interval))
return -EINVAL;
/* Fall through */
case WDIOC_GETTIMEOUT:
return put_user(timeout, p);
default:
return -ENOTTY;
}
return 0;
}
static const struct file_operations geodewdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = geodewdt_write,
.unlocked_ioctl = geodewdt_ioctl,
.open = geodewdt_open,
.release = geodewdt_release,
};
static struct miscdevice geodewdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &geodewdt_fops,
};
static int __devinit geodewdt_probe(struct platform_device *dev)
{
int ret, timer;
timer = geode_mfgpt_alloc_timer(MFGPT_TIMER_ANY, MFGPT_DOMAIN_WORKING);
if (timer == -1) {
printk(KERN_ERR "geodewdt: No timers were available\n");
return -ENODEV;
}
wdt_timer = timer;
/* Set up the timer */
geode_mfgpt_write(wdt_timer, MFGPT_REG_SETUP,
GEODEWDT_SCALE | (3 << 8));
/* Set up comparator 2 to reset when the event fires */
geode_mfgpt_toggle_event(wdt_timer, MFGPT_CMP2, MFGPT_EVENT_RESET, 1);
/* Set up the initial timeout */
geode_mfgpt_write(wdt_timer, MFGPT_REG_CMP2,
timeout * GEODEWDT_HZ);
ret = misc_register(&geodewdt_miscdev);
return ret;
}
static int __devexit geodewdt_remove(struct platform_device *dev)
{
misc_deregister(&geodewdt_miscdev);
return 0;
}
