static int bcm_kona_wdt_dbg_show(struct seq_file *s, void *data)
{
- int ctl_val, cur_val, ret;
+ int ctl_val, cur_val;
unsigned long flags;
struct bcm_kona_wdt *wdt = s->private;
- if (!wdt)
- return seq_puts(s, "No device pointer\n");
+ if (!wdt) {
+ seq_puts(s, "No device pointer\n");
+ return 0;
+ }
spin_lock_irqsave(&wdt->lock, flags);
ctl_val = secure_register_read(wdt, SECWDOG_CTRL_REG);
spin_unlock_irqrestore(&wdt->lock, flags);
if (ctl_val < 0 || cur_val < 0) {
- ret = seq_puts(s, "Error accessing hardware\n");
+ seq_puts(s, "Error accessing hardware\n");
} else {
int ctl, cur, ctl_sec, cur_sec, res;
cur = cur_val & SECWDOG_COUNT_MASK;
ctl_sec = TICKS_TO_SECS(ctl, wdt);
cur_sec = TICKS_TO_SECS(cur, wdt);
- ret = seq_printf(s, "Resolution: %d / %d\n"
- "Control: %d s / %d (%#x) ticks\n"
- "Current: %d s / %d (%#x) ticks\n"
- "Busy count: %lu\n", res,
- wdt->resolution, ctl_sec, ctl, ctl, cur_sec,
- cur, cur, wdt->busy_count);
+ seq_printf(s,
+ "Resolution: %d / %d\n"
+ "Control: %d s / %d (%#x) ticks\n"
+ "Current: %d s / %d (%#x) ticks\n"
+ "Busy count: %lu\n",
+ res, wdt->resolution,
+ ctl_sec, ctl, ctl,
+ cur_sec, cur, cur,
+ wdt->busy_count);
}
- return ret;
+ return 0;
}
static int bcm_kona_dbg_open(struct inode *inode, struct file *file)
*
* 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];
+static u32 nmi_stage1_insns[64] __initdata;
/* We need one branch and therefore one relocation per target label. */
-static struct uasm_label __initdata labels[5];
-static struct uasm_reloc __initdata relocs[5];
+static struct uasm_label labels[5] __initdata;
+static struct uasm_reloc relocs[5] __initdata;
enum lable_id {
label_enter_bootloader = 1
pr_debug("\t.set pop\n");
if (len > 32)
- panic("NMI stage 1 handler exceeds 32 instructions, was %d\n", len);
+ panic("NMI stage 1 handler exceeds 32 instructions, was %d\n",
+ len);
}
static int cpu2core(int cpu)
{
int d;
int v;
+
for (d = 0; d < digits; d++) {
v = (value >> ((digits - d - 1) * 4)) & 0xf;
if (v >= 10)
}
}
-const char *reg_name[] = {
+static const char reg_name[][3] = {
"$0", "at", "v0", "v1", "a0", "a1", "a2", "a3",
"a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3",
"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
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_test_cpu(cpu, &irq_enabled_cpus)) {
/* We have to enable the irq */
int irq = OCTEON_IRQ_WDOG0 + coreid;
+
enable_irq(irq);
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.
max_timeout_sec = 6;
do {
max_timeout_sec--;
- timeout_cnt = ((octeon_get_io_clock_rate() >> 8) * max_timeout_sec) >> 8;
+ timeout_cnt = ((octeon_get_io_clock_rate() >> 8) *
+ max_timeout_sec) >> 8;
} while (timeout_cnt > 65535);
BUG_ON(timeout_cnt == 0);
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 / firefly-linux-kernel-4.4.55.git / commitdiff