1 // SPDX-License-Identifier: GPL-2.0-only
10  * 960108	Fixed end-of-file pointer (Thanks to Dan Hollis), added
24  *		added watchdog disable/re-enable routines.  Added firmware
60 #include <linux/errno.h>	/* For the -ENODEV/... values */
71 #include <linux/ioport.h>	/* For io-port access */
79 #define WATCHDOG_DRIVER_NAME "ISA-PC Watchdog"
94  * These are the auto-probe addresses available.
104  * PCI-PC Watchdog card.
117 							on-board processor */
125 							(1:SW1 <-> 0:SW2) */
129 /* 500ms for each 4 bit response (according to spec.) */
150 	20,	/* OFF-OFF-OFF	= 20 Sec  */
151 	40,	/* OFF-OFF-ON	= 40 Sec  */
152 	60,	/* OFF-ON-OFF	=  1 Min  */
153 	300,	/* OFF-ON-ON	=  5 Min  */
154 	600,	/* ON-OFF-OFF	= 10 Min  */
155 	1800,	/* ON-OFF-ON	= 30 Min  */
156 	3600,	/* ON-ON-OFF	=  1 Hour */
157 	7200,	/* ON-ON-ON	=  2 hour */
176 /* this is private data for each ISA-PC watchdog card */
200 /* default heartbeat = delay-time from dip-switches */
205 	"(2 <= heartbeat <= 7200 or 0=delay-time from dip-switches, default="
227 	/* The WCMD bit must be 1 and the command is only 4 bits in size */  in send_isa_command()
301 	int one, ten, hund, minor;  in pcwd_get_firmware()  local
307 		ten = send_isa_command(CMD_ISA_VERSION_TENTH);  in pcwd_get_firmware()
311 					one, ten, hund, minor);  in pcwd_get_firmware()
337 		pr_info("ISA-PC Watchdog (REV.A) detected at port 0x%04x\n",  in pcwd_show_card_info()
341 		pr_info("ISA-PC Watchdog (REV.C) detected at port 0x%04x (Firmware version: %s)\n",  in pcwd_show_card_info()
368 		pr_info("No previous trip detected - Cold boot or reset\n");  in pcwd_show_card_info()
382 			    WD_WDRST bit in register 1 */  in pcwd_timer_ping()
389 			/* Re-trigger watchdog by writing to port 0 */  in pcwd_timer_ping()
393 		/* Re-set the timer interval */  in pcwd_timer_ping()
420 			return -EIO;  in pcwd_start()
448 			return -EIO;  in pcwd_stop()
472 		return -EINVAL;  in pcwd_set_heartbeat()
497 		 * over-temperature condition. And the reboot  in pcwd_get_status()
561 		return -1;  in pcwd_get_temperature()
565 		return -ENODEV;  in pcwd_get_temperature()
606 			return -EFAULT;  in pcwd_ioctl()
618 			return -EFAULT;  in pcwd_ioctl()
625 				return -EFAULT;  in pcwd_ioctl()
640 		return -EINVAL;  in pcwd_ioctl()
648 			return -EFAULT;  in pcwd_ioctl()
651 			return -EINVAL;  in pcwd_ioctl()
660 		return -ENOTTY;  in pcwd_ioctl()
680 					return -EFAULT;  in pcwd_write()
693 		return -EBUSY;  in pcwd_open()
725 		return -EFAULT;  in pcwd_temp_read()
728 		return -EFAULT;  in pcwd_temp_read()
736 		return -ENODEV;  in pcwd_temp_open()
798  *  The ISA cards have a heartbeat bit in one of the registers, which
799  *  register is card dependent.  The heartbeat bit is monitored, and if
836 			/* Has either heartbeat bit changed?  */  in pcwd_isa_match()
863 		return -ENODEV;  in pcwd_isa_probe()
867 		pr_err("No I/O-Address for card detected\n");  in pcwd_isa_probe()
868 		return -ENODEV;  in pcwd_isa_probe()
881 		ret = -EIO;  in pcwd_isa_probe()
907 	/* If heartbeat = 0 then we use the heartbeat from the dip-switches */  in pcwd_isa_probe()
948 	cards_found--;  in pcwd_isa_probe()
968 	cards_found--;  in pcwd_isa_remove()
994 MODULE_DESCRIPTION("Berkshire ISA-PC Watchdog driver");