#include <linux/bitops.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
-
-#include <asm/hardware.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <linux/device.h>
#define MODULE_NAME "DAVINCI-WDT: "
static int heartbeat = DEFAULT_HEARTBEAT;
-static spinlock_t io_lock;
+static DEFINE_SPINLOCK(io_lock);
static unsigned long wdt_status;
#define WDT_IN_USE 0
#define WDT_OK_TO_CLOSE 1
spin_lock(&io_lock);
/* put watchdog in service state */
- davinci_writel(WDKEY_SEQ0, wdt_base + WDTCR);
+ iowrite32(WDKEY_SEQ0, wdt_base + WDTCR);
/* put watchdog in active state */
- davinci_writel(WDKEY_SEQ1, wdt_base + WDTCR);
+ iowrite32(WDKEY_SEQ1, wdt_base + WDTCR);
spin_unlock(&io_lock);
}
spin_lock(&io_lock);
/* disable, internal clock source */
- davinci_writel(0, wdt_base + TCR);
+ iowrite32(0, wdt_base + TCR);
/* reset timer, set mode to 64-bit watchdog, and unreset */
- davinci_writel(0, wdt_base + TGCR);
+ iowrite32(0, wdt_base + TGCR);
tgcr = TIMMODE_64BIT_WDOG | TIM12RS_UNRESET | TIM34RS_UNRESET;
- davinci_writel(tgcr, wdt_base + TGCR);
+ iowrite32(tgcr, wdt_base + TGCR);
/* clear counter regs */
- davinci_writel(0, wdt_base + TIM12);
- davinci_writel(0, wdt_base + TIM34);
+ iowrite32(0, wdt_base + TIM12);
+ iowrite32(0, wdt_base + TIM34);
/* set timeout period */
timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) & 0xffffffff);
- davinci_writel(timer_margin, wdt_base + PRD12);
+ iowrite32(timer_margin, wdt_base + PRD12);
timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) >> 32);
- davinci_writel(timer_margin, wdt_base + PRD34);
+ iowrite32(timer_margin, wdt_base + PRD34);
/* enable run continuously */
- davinci_writel(ENAMODE12_PERIODIC, wdt_base + TCR);
+ iowrite32(ENAMODE12_PERIODIC, wdt_base + TCR);
/* Once the WDT is in pre-active state write to
* TIM12, TIM34, PRD12, PRD34, TCR, TGCR, WDTCR are
* write protected (except for the WDKEY field)
*/
/* put watchdog in pre-active state */
- davinci_writel(WDKEY_SEQ0 | WDEN, wdt_base + WDTCR);
+ iowrite32(WDKEY_SEQ0 | WDEN, wdt_base + WDTCR);
/* put watchdog in active state */
- davinci_writel(WDKEY_SEQ1 | WDEN, wdt_base + WDTCR);
+ iowrite32(WDKEY_SEQ1 | WDEN, wdt_base + WDTCR);
spin_unlock(&io_lock);
}
.identity = "DaVinci Watchdog",
};
-static int
-davinci_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long davinci_wdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
int ret = -ENOTTY;
ret = put_user(0, (int *)arg);
break;
- case WDIOC_GETTIMEOUT:
- ret = put_user(heartbeat, (int *)arg);
- break;
-
case WDIOC_KEEPALIVE:
wdt_service();
ret = 0;
break;
+
+ case WDIOC_GETTIMEOUT:
+ ret = put_user(heartbeat, (int *)arg);
+ break;
}
return ret;
}
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = davinci_wdt_write,
- .ioctl = davinci_wdt_ioctl,
+ .unlocked_ioctl = davinci_wdt_ioctl,
.open = davinci_wdt_open,
.release = davinci_wdt_release,
};
{
int ret = 0, size;
struct resource *res;
-
- spin_lock_init(&io_lock);
+ struct device *dev = &pdev->dev;
if (heartbeat < 1 || heartbeat > MAX_HEARTBEAT)
heartbeat = DEFAULT_HEARTBEAT;
- printk(KERN_INFO MODULE_NAME
- "DaVinci Watchdog Timer: heartbeat %d sec\n", heartbeat);
+ dev_info(dev, "heartbeat %d sec\n", heartbeat);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
- printk(KERN_INFO MODULE_NAME
- "failed to get memory region resource\n");
+ dev_err(dev, "failed to get memory region resource\n");
return -ENOENT;
}
wdt_mem = request_mem_region(res->start, size, pdev->name);
if (wdt_mem == NULL) {
- printk(KERN_INFO MODULE_NAME "failed to get memory region\n");
+ dev_err(dev, "failed to get memory region\n");
return -ENOENT;
}
- wdt_base = (void __iomem *)(res->start);
+
+ wdt_base = ioremap(res->start, size);
+ if (!wdt_base) {
+ dev_err(dev, "failed to map memory region\n");
+ return -ENOMEM;
+ }
ret = misc_register(&davinci_wdt_miscdev);
if (ret < 0) {
- printk(KERN_ERR MODULE_NAME "cannot register misc device\n");
+ dev_err(dev, "cannot register misc device\n");
release_resource(wdt_mem);
kfree(wdt_mem);
} else {
set_bit(WDT_DEVICE_INITED, &wdt_status);
}
+ iounmap(wdt_base);
return ret;
}
static struct platform_driver platform_wdt_driver = {
.driver = {
.name = "watchdog",
+ .owner = THIS_MODULE,
},
.probe = davinci_wdt_probe,
.remove = davinci_wdt_remove,
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+MODULE_ALIAS("platform:watchdog");