target/linux/aruba-2.6/patches/004-wdt.patch

   1 diff -Nur linux-2.6.15.1/drivers/char/watchdog/wdt_merlot.c linux-2.6.15.1-openwrt/drivers/char/watchdog/wdt_merlot.c
   2 --- linux-2.6.15.1/drivers/char/watchdog/wdt_merlot.c   2006-01-26 21:14:02.204626250 -0800
   3 +++ linux-2.6.15.1-openwrt/drivers/char/watchdog/wdt_merlot.c   2006-02-02 20:31:43.000000000 -0800
   4 @@ -0,0 +1,110 @@
   5 +#include <linux/autoconf.h>
   6 +#include <linux/module.h>
   7 +#include <linux/types.h>
   8 +#include <linux/miscdevice.h>
   9 +#include <linux/watchdog.h>
  10 +#include <linux/fs.h>
  11 +
  12 +#include <asm/io.h>
  13 +#include <asm/uaccess.h>
  14 +#include <asm/system.h>
  15 +#include <asm/bootinfo.h>
  16 +
  17 +extern unsigned long mips_machtype;
  18 +
  19 +static unsigned long wdt_is_open;
  20 +static struct timer_list wdt_timer;
  21 +
  22 +static void wdt_merlot_refresh(void)
  23 +{
  24 +    volatile __u32 *wdt;
  25 +    switch (mips_machtype) {
  26 +    case MACH_ARUBA_AP70:
  27 +       wdt = (__u32 *) 0xb8030034;
  28 +       *wdt = 0x10000000;
  29 +       break;
  30 +    default:
  31 +       wdt = (__u32 *) 0xbc00300c;
  32 +       *wdt = 0x40000000;
  33 +       break;
  34 +    }
  35 +}
  36 +
  37 +static void wdt_merlot_timer_fn(unsigned long data)
  38 +{
  39 +    wdt_merlot_refresh();
  40 +    if (!test_bit(1, &wdt_is_open))
  41 +       mod_timer(&wdt_timer, jiffies + HZ);
  42 +}
  43 +
  44 +static int wdt_merlot_setup_timer(void)
  45 +{
  46 +
  47 +    init_timer(&wdt_timer);
  48 +    wdt_timer.function = wdt_merlot_timer_fn;
  49 +    wdt_timer.data = 0;
  50 +    wdt_timer.expires = jiffies + HZ;
  51 +    add_timer(&wdt_timer);
  52 +    return 0;
  53 +}
  54 +
  55 +static int wdt_open(struct inode *inode, struct file *file)
  56 +{
  57 +    if (test_and_set_bit(0, &wdt_is_open))
  58 +       return -EBUSY;
  59 +    set_bit(1, &wdt_is_open);
  60 +    return nonseekable_open(inode, file);
  61 +}
  62 +
  63 +static ssize_t wdt_write(struct file *file, const char __user * buf, size_t count, loff_t * ppos)
  64 +{
  65 +    if (count)         /* something was written */
  66 +       wdt_merlot_refresh();
  67 +    return count;
  68 +}
  69 +
  70 +static int wdt_release(struct inode *inode, struct file *file)
  71 +{
  72 +    clear_bit(0, &wdt_is_open);
  73 +    return 0;
  74 +}
  75 +
  76 +static struct file_operations wdt_fops = {
  77 +    .owner = THIS_MODULE,
  78 +    .llseek = no_llseek,
  79 +    .write = wdt_write,
  80 +    .open = wdt_open,
  81 +    .release = wdt_release,
  82 +};
  83 +
  84 +static struct miscdevice wdt_miscdev = {
  85 +    .minor = WATCHDOG_MINOR,
  86 +    .name = "watchdog",
  87 +    .fops = &wdt_fops,
  88 +};
  89 +
  90 +static void __exit wdt_exit(void)
  91 +{
  92 +    misc_deregister(&wdt_miscdev);
  93 +}
  94 +
  95 +static int __init wdt_init(void)
  96 +{
  97 +    int ret;
  98 +    ret = misc_register(&wdt_miscdev);
  99 +    if (ret) {
 100 +       printk(KERN_ERR
 101 +              "wdt: cannot register miscdev on minor=%d (err=%d)\n",
 102 +              WATCHDOG_MINOR, ret);
 103 +       misc_deregister(&wdt_miscdev);
 104 +       goto out;
 105 +    }
 106 +    printk("wdt: registered with refresh\n");
 107 +    wdt_merlot_refresh();
 108 +    wdt_merlot_setup_timer();
 109 +  out:
 110 +    return ret;
 111 +}
 112 +
 113 +module_init(wdt_init);
 114 +module_exit(wdt_exit);
 115 diff -Nur linux-2.6.15.3/drivers/char/watchdog/Makefile linux-2.6.15.3-openwrt/drivers/char/watchdog/Makefile
 116 --- linux-2.6.15.3/drivers/char/watchdog/Makefile       2006-02-22 10:04:18.596278000 -0800
 117 +++ linux-2.6.15.3-openwrt/drivers/char/watchdog/Makefile       2006-02-22 10:06:21.400960000 -0800
 118 @@ -71,5 +71,8 @@
 119
 120  # SPARC64 Architecture
 121
 122 +# Aruba Architecture
 123 +obj-$(CONFIG_MACH_ARUBA) += wdt_merlot.o
 124 +
 125  # Architecture Independant
 126  obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o