// SPDX-License-Identifier: GPL-2.0+ /* * w83627hf/thf WDT driver * * (c) Copyright 2013 Guenter Roeck * converted to watchdog infrastructure * * (c) Copyright 2007 Vlad Drukker <[email protected]> * added support for W83627THF. * * (c) Copyright 2003,2007 Pádraig Brady <[email protected]> * * Based on advantechwdt.c which is based on wdt.c. * Original copyright messages: * * (c) Copyright 2000-2001 Marek Michalkiewicz <[email protected]> * * (c) Copyright 1996 Alan Cox <[email protected]>, * All Rights Reserved. * * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. * * (c) Copyright 1995 Alan Cox <[email protected]> */ #define pr_fmt(fmt) … #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/types.h> #include <linux/watchdog.h> #include <linux/ioport.h> #include <linux/init.h> #include <linux/io.h> #include <linux/dmi.h> #define WATCHDOG_NAME … #define WATCHDOG_TIMEOUT … static int wdt_io; static int cr_wdt_timeout; /* WDT timeout register */ static int cr_wdt_control; /* WDT control register */ static int cr_wdt_csr; /* WDT control & status register */ static int wdt_cfg_enter = …;/* key to unlock configuration space */ static int wdt_cfg_leave = …;/* key to lock configuration space */ enum chips { … }; static int timeout; /* in seconds */ module_param(timeout, int, 0); MODULE_PARM_DESC(…) …; static bool nowayout = … WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0); MODULE_PARM_DESC(…) …; static int early_disable; module_param(early_disable, int, 0); MODULE_PARM_DESC(…) …; /* * Kernel methods. */ #define WDT_EFER … #define WDT_EFIR … #define WDT_EFDR … #define W83627HF_LD_WDT … #define W83627HF_ID … #define W83627S_ID … #define W83697HF_ID … #define W83697UG_ID … #define W83637HF_ID … #define W83627THF_ID … #define W83687THF_ID … #define W83627EHF_ID … #define W83627DHG_ID … #define W83627UHG_ID … #define W83667HG_ID … #define W83627DHG_P_ID … #define W83667HG_B_ID … #define NCT6775_ID … #define NCT6776_ID … #define NCT6102_ID … #define NCT6116_ID … #define NCT6779_ID … #define NCT6791_ID … #define NCT6792_ID … #define NCT6793_ID … #define NCT6795_ID … #define NCT6796_ID … #define W83627HF_WDT_TIMEOUT … #define W83697HF_WDT_TIMEOUT … #define NCT6102D_WDT_TIMEOUT … #define W83627HF_WDT_CONTROL … #define W83697HF_WDT_CONTROL … #define NCT6102D_WDT_CONTROL … #define W836X7HF_WDT_CSR … #define NCT6102D_WDT_CSR … #define WDT_CSR_STATUS … #define WDT_CSR_KBD … #define WDT_CSR_MOUSE … static void superio_outb(int reg, int val) { … } static inline int superio_inb(int reg) { … } static int superio_enter(void) { … } static void superio_select(int ld) { … } static void superio_exit(void) { … } static int w83627hf_init(struct watchdog_device *wdog, enum chips chip) { … } static int wdt_set_time(unsigned int timeout) { … } static int wdt_start(struct watchdog_device *wdog) { … } static int wdt_stop(struct watchdog_device *wdog) { … } static int wdt_set_timeout(struct watchdog_device *wdog, unsigned int timeout) { … } static unsigned int wdt_get_time(struct watchdog_device *wdog) { … } /* * Kernel Interfaces */ static const struct watchdog_info wdt_info = …; static const struct watchdog_ops wdt_ops = …; static struct watchdog_device wdt_dev = …; /* * The WDT needs to learn about soft shutdowns in order to * turn the timebomb registers off. */ static int wdt_find(int addr) { … } /* * On some systems, the NCT6791D comes with a companion chip and the * watchdog function is in this companion chip. We must use a different * unlocking sequence to access the companion chip. */ static int __init wdt_use_alt_key(const struct dmi_system_id *d) { … } static const struct dmi_system_id wdt_dmi_table[] __initconst = …; static int __init wdt_init(void) { … } static void __exit wdt_exit(void) { … } module_init(…) …; module_exit(wdt_exit); MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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