1 // SPDX-License-Identifier: GPL-2.0-or-later
9  *	any of this software. This material is provided "AS-IS" in
12  *	(C) Copyright 2003-2006  Sven Anders <anders@anduras.de>
15  *	2003 - Created version 1.0 for Linux 2.4.x.
16  *	2006 - Ported to Linux 2.6, added nowayout and MAGICCLOSE
38  * For an example userspace keep-alive daemon, see:
60 /* enable support for minutes as units? */
86 /* -- Low level function ----------------------------------------*/
124 /* -- Medium level functions ------------------------------------*/
128 	/* -- General Purpose I/O Bit 1.2 --  in gpio_bit12()
130 	 * Bit 1,   Polarity: 0 = No Invert, 1 = Invert  in gpio_bit12()
131 	 * Bit 2,   Group Enable Intr.: 0 = Disable, 1 = Enable  in gpio_bit12()
142 	/* -- General Purpose I/O Bit 1.3 --  in gpio_bit13()
144 	 * Bit 1,  Polarity: 0 = No Invert, 1 = Invert  in gpio_bit13()
145 	 * Bit 2,  Group Enable Intr.: 0 = Disable, 1 = Enable  in gpio_bit13()
147 	 * Bit 4-6 (Reserved)  in gpio_bit13()
155 	/* -- Watchdog timer units --  in wdt_timer_units()
156 	 * Bit 0-6 (Reserved)  in wdt_timer_units()
157 	 * Bit 7,  WDT Time-out Value Units Select  in wdt_timer_units()
165 	/* -- Watchdog Timer Time-out Value --  in wdt_timeout_value()
166 	 * Bit 0-7 Binary coded units (0=Disabled, 1..255)  in wdt_timeout_value()
173 	/* -- Watchdog timer configuration --  in wdt_timer_conf()
174 	 * Bit 0   Joystick enable: 0* = No Reset, 1 = Reset WDT upon  in wdt_timer_conf()
176 	 * Bit 1   Keyboard enable: 0* = No Reset, 1 = Reset WDT upon KBD Intr.  in wdt_timer_conf()
177 	 * Bit 2   Mouse enable: 0* = No Reset, 1 = Reset WDT upon Mouse Intr  in wdt_timer_conf()
181 	 * Bit 4-7 WDT Interrupt Mapping: (0000* = Disabled,  in wdt_timer_conf()
189 	/* -- Watchdog timer control --  in wdt_timer_ctrl()
192 	 * Bit 2   Force Timeout: 1 = Forces WD timeout event (self-cleaning)  in wdt_timer_ctrl()
198 	 * -- Soft power management --  in wdt_timer_ctrl()
200 	 *            set via register 0xB8, (self-cleaning)  in wdt_timer_ctrl()
203 	 *            set via register 0xB8, (self-cleaning)  in wdt_timer_ctrl()
204 	 * Bit 7   SPOFF: 1 = Force software power down (self-cleaning)  in wdt_timer_ctrl()
209 /* -- Higher level functions ------------------------------------*/
221 	/* enable the watchdog */  in wb_smsc_wdt_initialize()
224 			      GPIO/Output/Polarity=Invert */  in wb_smsc_wdt_initialize()
271 /* set timeout => enable watchdog */
279 	/* set Power LED to blink, if we enable the timeout */  in wb_smsc_wdt_set_timeout()
313 /* enable watchdog by setting the current timeout */
345 /* -- File operations -------------------------------------------*/
347 /* open => enable watchdog and set initial timeout */
354 		return -EBUSY;  in wb_smsc_wdt_open()
405 					return -EFAULT;  in wb_smsc_wdt_write()
442 								? -EFAULT : 0;  in wb_smsc_wdt_ioctl()
449 		int options, retval = -EINVAL;  in wb_smsc_wdt_ioctl()
452 			return -EFAULT;  in wb_smsc_wdt_ioctl()
469 			return -EFAULT;  in wb_smsc_wdt_ioctl()
474 			return -EINVAL;  in wb_smsc_wdt_ioctl()
484 		return -ENOTTY;  in wb_smsc_wdt_ioctl()
488 /* -- Notifier funtions -----------------------------------------*/
494 		/* set timeout to 0, to avoid possible race-condition */  in wb_smsc_wdt_notify_sys()
501 /* -- Module's structures ---------------------------------------*/
523 /* -- Module init functions -------------------------------------*/
536 		ret = -EBUSY;  in wb_smsc_wdt_init()
610 MODULE_PARM_DESC(timeout, "range is 1-255 units, default is 60");