*
* Copyright (C) 2007, 2008, 2009, 2010 Cavium Networks
*
+ * Converted to use WATCHDOG_CORE by Aaro Koskinen <aaro.koskinen@iki.fi>.
+ *
* Some parts derived from wdt.c
*
* (c) Copyright 1996-1997 Alan Cox <alan@lxorguk.ukuu.org.uk>,
"Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-static unsigned long octeon_wdt_is_open;
-static char expect_close;
-
static u32 __initdata nmi_stage1_insns[64];
/* We need one branch and therefore one relocation per target label. */
static struct uasm_label __initdata labels[5];
return NOTIFY_OK;
}
-static void octeon_wdt_ping(void)
+static int octeon_wdt_ping(struct watchdog_device __always_unused *wdog)
{
int cpu;
int coreid;
cpumask_set_cpu(cpu, &irq_enabled_cpus);
}
}
+ return 0;
}
static void octeon_wdt_calc_parameters(int t)
timeout_cnt = ((octeon_get_io_clock_rate() >> 8) * timeout_sec) >> 8;
}
-static int octeon_wdt_set_heartbeat(int t)
+static int octeon_wdt_set_timeout(struct watchdog_device *wdog,
+ unsigned int t)
{
int cpu;
int coreid;
cvmx_write_csr(CVMX_CIU_WDOGX(coreid), ciu_wdog.u64);
cvmx_write_csr(CVMX_CIU_PP_POKEX(coreid), 1);
}
- octeon_wdt_ping(); /* Get the irqs back on. */
+ octeon_wdt_ping(wdog); /* Get the irqs back on. */
return 0;
}
-/**
- * octeon_wdt_write:
- * @file: file handle to the watchdog
- * @buf: buffer to write (unused as data does not matter here
- * @count: count of bytes
- * @ppos: pointer to the position to write. No seeks allowed
- *
- * A write to a watchdog device is defined as a keepalive signal. Any
- * write of data will do, as we we don't define content meaning.
- */
-
-static ssize_t octeon_wdt_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- if (count) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 1;
- }
- }
- octeon_wdt_ping();
- }
- return count;
-}
-
-/**
- * octeon_wdt_ioctl:
- * @file: file handle to the device
- * @cmd: watchdog command
- * @arg: argument pointer
- *
- * The watchdog API defines a common set of functions for all
- * watchdogs according to their available features. We only
- * actually usefully support querying capabilities and setting
- * the timeout.
- */
-
-static long octeon_wdt_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int new_heartbeat;
-
- static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT|
- WDIOF_MAGICCLOSE|
- WDIOF_KEEPALIVEPING,
- .firmware_version = 1,
- .identity = "OCTEON",
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- octeon_wdt_ping();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_heartbeat, p))
- return -EFAULT;
- if (octeon_wdt_set_heartbeat(new_heartbeat))
- return -EINVAL;
- /* Fall through. */
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
- default:
- return -ENOTTY;
- }
-}
-
-/**
- * octeon_wdt_open:
- * @inode: inode of device
- * @file: file handle to device
- *
- * The watchdog device has been opened. The watchdog device is single
- * open and on opening we do a ping to reset the counters.
- */
-
-static int octeon_wdt_open(struct inode *inode, struct file *file)
+static int octeon_wdt_start(struct watchdog_device *wdog)
{
- if (test_and_set_bit(0, &octeon_wdt_is_open))
- return -EBUSY;
- /*
- * Activate
- */
- octeon_wdt_ping();
+ octeon_wdt_ping(wdog);
do_coundown = 1;
- return nonseekable_open(inode, file);
+ return 0;
}
-/**
- * octeon_wdt_release:
- * @inode: inode to board
- * @file: file handle to board
- *
- * The watchdog has a configurable API. There is a religious dispute
- * between people who want their watchdog to be able to shut down and
- * those who want to be sure if the watchdog manager dies the machine
- * reboots. In the former case we disable the counters, in the latter
- * case you have to open it again very soon.
- */
-
-static int octeon_wdt_release(struct inode *inode, struct file *file)
+static int octeon_wdt_stop(struct watchdog_device *wdog)
{
- if (expect_close) {
- do_coundown = 0;
- octeon_wdt_ping();
- } else {
- pr_crit("WDT device closed unexpectedly. WDT will not stop!\n");
- }
- clear_bit(0, &octeon_wdt_is_open);
- expect_close = 0;
+ do_coundown = 0;
+ octeon_wdt_ping(wdog);
return 0;
}
-static const struct file_operations octeon_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = octeon_wdt_write,
- .unlocked_ioctl = octeon_wdt_ioctl,
- .open = octeon_wdt_open,
- .release = octeon_wdt_release,
+static struct notifier_block octeon_wdt_cpu_notifier = {
+ .notifier_call = octeon_wdt_cpu_callback,
};
-static struct miscdevice octeon_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &octeon_wdt_fops,
+static const struct watchdog_info octeon_wdt_info = {
+ .options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING,
+ .identity = "OCTEON",
};
-static struct notifier_block octeon_wdt_cpu_notifier = {
- .notifier_call = octeon_wdt_cpu_callback,
+static const struct watchdog_ops octeon_wdt_ops = {
+ .owner = THIS_MODULE,
+ .start = octeon_wdt_start,
+ .stop = octeon_wdt_stop,
+ .ping = octeon_wdt_ping,
+ .set_timeout = octeon_wdt_set_timeout,
};
+static struct watchdog_device octeon_wdt = {
+ .info = &octeon_wdt_info,
+ .ops = &octeon_wdt_ops,
+};
/**
* Module/ driver initialization.
pr_info("Initial granularity %d Sec\n", timeout_sec);
- ret = misc_register(&octeon_wdt_miscdev);
+ octeon_wdt.timeout = timeout_sec;
+ octeon_wdt.max_timeout = UINT_MAX;
+
+ watchdog_set_nowayout(&octeon_wdt, nowayout);
+
+ ret = watchdog_register_device(&octeon_wdt);
if (ret) {
- pr_err("cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto out;
+ pr_err("watchdog_register_device() failed: %d\n", ret);
+ return ret;
}
/* Build the NMI handler ... */
__register_hotcpu_notifier(&octeon_wdt_cpu_notifier);
cpu_notifier_register_done();
-out:
- return ret;
+ return 0;
}
/**
{
int cpu;
- misc_deregister(&octeon_wdt_miscdev);
+ watchdog_unregister_device(&octeon_wdt);
cpu_notifier_register_begin();
__unregister_hotcpu_notifier(&octeon_wdt_cpu_notifier);
projects / platform / kernel / linux-rpi.git / commitdiff