^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Watchdog driver for SBC-FITPC2 board
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Author: Denis Turischev <denis@compulab.co.il>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Adapted from the IXP2000 watchdog driver by Deepak Saxena.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * This file is licensed under the terms of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * License version 2. This program is licensed "as is" without any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * warranty of any kind, whether express or implied.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define pr_fmt(fmt) KBUILD_MODNAME " WATCHDOG: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/miscdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/watchdog.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/dmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static bool nowayout = WATCHDOG_NOWAYOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static unsigned int margin = 60; /* (secs) Default is 1 minute */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static unsigned long wdt_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static DEFINE_MUTEX(wdt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define WDT_IN_USE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define WDT_OK_TO_CLOSE 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define COMMAND_PORT 0x4c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define DATA_PORT 0x48
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define IFACE_ON_COMMAND 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define REBOOT_COMMAND 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define WATCHDOG_NAME "SBC-FITPC2 Watchdog"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static void wdt_send_data(unsigned char command, unsigned char data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) outb(data, DATA_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) msleep(200);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) outb(command, COMMAND_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) msleep(100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static void wdt_enable(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) mutex_lock(&wdt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) wdt_send_data(IFACE_ON_COMMAND, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) wdt_send_data(REBOOT_COMMAND, margin);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) mutex_unlock(&wdt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static void wdt_disable(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) mutex_lock(&wdt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) wdt_send_data(IFACE_ON_COMMAND, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) wdt_send_data(REBOOT_COMMAND, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) mutex_unlock(&wdt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static int fitpc2_wdt_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (test_and_set_bit(WDT_IN_USE, &wdt_status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) wdt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return stream_open(inode, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static ssize_t fitpc2_wdt_write(struct file *file, const char *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) size_t len, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) size_t i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (!len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (nowayout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) for (i = 0; i != len; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) char c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (get_user(c, data + i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (c == 'V')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) set_bit(WDT_OK_TO_CLOSE, &wdt_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) wdt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static const struct watchdog_info ident = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) .options = WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) WDIOF_KEEPALIVEPING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) .identity = WATCHDOG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static long fitpc2_wdt_ioctl(struct file *file, unsigned int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) int ret = -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) int time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) case WDIOC_GETSUPPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) ret = copy_to_user((struct watchdog_info *)arg, &ident,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) sizeof(ident)) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) case WDIOC_GETSTATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ret = put_user(0, (int *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) case WDIOC_GETBOOTSTATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ret = put_user(0, (int *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) case WDIOC_KEEPALIVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) wdt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) case WDIOC_SETTIMEOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) ret = get_user(time, (int *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (time < 31 || time > 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) margin = time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) wdt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) case WDIOC_GETTIMEOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) ret = put_user(margin, (int *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static int fitpc2_wdt_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (test_bit(WDT_OK_TO_CLOSE, &wdt_status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) wdt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) pr_info("Device disabled\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) pr_warn("Device closed unexpectedly - timer will not stop\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) wdt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) clear_bit(WDT_IN_USE, &wdt_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static const struct file_operations fitpc2_wdt_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) .llseek = no_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) .write = fitpc2_wdt_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) .unlocked_ioctl = fitpc2_wdt_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) .compat_ioctl = compat_ptr_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) .open = fitpc2_wdt_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) .release = fitpc2_wdt_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static struct miscdevice fitpc2_wdt_miscdev = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) .minor = WATCHDOG_MINOR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) .name = "watchdog",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) .fops = &fitpc2_wdt_fops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static int __init fitpc2_wdt_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) const char *brd_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) brd_name = dmi_get_system_info(DMI_BOARD_NAME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (!brd_name || !strstr(brd_name, "SBC-FITPC2"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) pr_info("%s found\n", brd_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (!request_region(COMMAND_PORT, 1, WATCHDOG_NAME)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) pr_err("I/O address 0x%04x already in use\n", COMMAND_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (!request_region(DATA_PORT, 1, WATCHDOG_NAME)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) pr_err("I/O address 0x%04x already in use\n", DATA_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) goto err_data_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (margin < 31 || margin > 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) pr_err("margin must be in range 31 - 255 seconds, you tried to set %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) margin);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) goto err_margin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) err = misc_register(&fitpc2_wdt_miscdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) pr_err("cannot register miscdev on minor=%d (err=%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) WATCHDOG_MINOR, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) goto err_margin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) err_margin:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) release_region(DATA_PORT, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) err_data_port:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) release_region(COMMAND_PORT, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static void __exit fitpc2_wdt_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) misc_deregister(&fitpc2_wdt_miscdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) release_region(DATA_PORT, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) release_region(COMMAND_PORT, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) module_init(fitpc2_wdt_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) module_exit(fitpc2_wdt_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) MODULE_AUTHOR("Denis Turischev <denis@compulab.co.il>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) MODULE_DESCRIPTION("SBC-FITPC2 Watchdog");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) module_param(margin, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) MODULE_PARM_DESC(margin, "Watchdog margin in seconds (default 60s)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) module_param(nowayout, bool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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