// SPDX-License-Identifier: GPL-2.0-or-later /* * IT8712F "Smart Guardian" Watchdog support * * Copyright (c) 2006-2007 Jorge Boncompte - DTI2 <[email protected]> * * Based on info and code taken from: * * drivers/char/watchdog/scx200_wdt.c * drivers/hwmon/it87.c * IT8712F EC-LPC I/O Preliminary Specification 0.8.2 * IT8712F EC-LPC I/O Preliminary Specification 0.9.3 * * The author(s) of this software shall not be held liable for damages * of any nature resulting due to the use of this software. This * software is provided AS-IS with no warranties. */ #define pr_fmt(fmt) … #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/miscdevice.h> #include <linux/watchdog.h> #include <linux/notifier.h> #include <linux/reboot.h> #include <linux/fs.h> #include <linux/spinlock.h> #include <linux/uaccess.h> #include <linux/io.h> #include <linux/ioport.h> #define NAME … MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; static int max_units = …; static int margin = …; /* in seconds */ module_param(margin, int, 0); MODULE_PARM_DESC(…) …; static bool nowayout = … WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0); MODULE_PARM_DESC(…) …; static unsigned long wdt_open; static unsigned expect_close; static unsigned char revision; /* Dog Food address - We use the game port address */ static unsigned short address; #define REG … #define VAL … #define LDN … #define DEVID … #define DEVREV … #define ACT_REG … #define BASE_REG … #define IT8712F_DEVID … #define LDN_GPIO … #define LDN_GAME … #define WDT_CONTROL … #define WDT_CONFIG … #define WDT_TIMEOUT … #define WDT_RESET_GAME … #define WDT_RESET_KBD … #define WDT_RESET_MOUSE … #define WDT_RESET_CIR … #define WDT_UNIT_SEC … #define WDT_OUT_PWROK … #define WDT_OUT_KRST … static int wdt_control_reg = …; module_param(wdt_control_reg, int, 0); MODULE_PARM_DESC(…) …; static int superio_inb(int reg) { … } static void superio_outb(int val, int reg) { … } static int superio_inw(int reg) { … } static inline void superio_select(int ldn) { … } static inline int superio_enter(void) { … } static inline void superio_exit(void) { … } static inline void it8712f_wdt_ping(void) { … } static void it8712f_wdt_update_margin(void) { … } static int it8712f_wdt_get_status(void) { … } static int it8712f_wdt_enable(void) { … } static int it8712f_wdt_disable(void) { … } static int it8712f_wdt_notify(struct notifier_block *this, unsigned long code, void *unused) { … } static struct notifier_block it8712f_wdt_notifier = …; static ssize_t it8712f_wdt_write(struct file *file, const char __user *data, size_t len, loff_t *ppos) { … } static long it8712f_wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { … } static int it8712f_wdt_open(struct inode *inode, struct file *file) { … } static int it8712f_wdt_release(struct inode *inode, struct file *file) { … } static const struct file_operations it8712f_wdt_fops = …; static struct miscdevice it8712f_wdt_miscdev = …; static int __init it8712f_wdt_find(unsigned short *address) { … } static int __init it8712f_wdt_init(void) { … } static void __exit it8712f_wdt_exit(void) { … } module_init(…) …; module_exit(it8712f_wdt_exit);
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