1 // SPDX-License-Identifier: GPL-2.0+
3  *	Berkshire PCI-PC Watchdog Card Driver
5  *	(c) Copyright 2003-2007 Wim Van Sebroeck <wim@iguana.be>.
16  *	provided "AS-IS" and at no charge.
36 #include <linux/errno.h>	/* For the -ENODEV/... values */
46 #include <linux/ioport.h>	/* For io-port access */
53 #define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog"
68  * PCI-PC Watchdog card.
76 #define WD_PCI_R2DS		0x40	/* Relay 2 Disable Temperature-trip /
98 	5,	/* OFF-OFF-OFF	=  5 Sec  */
99 	10,	/* OFF-OFF-ON	= 10 Sec  */
100 	30,	/* OFF-ON-OFF	= 30 Sec  */
101 	60,	/* OFF-ON-ON	=  1 Min  */
102 	300,	/* ON-OFF-OFF	=  5 Min  */
103 	600,	/* ON-OFF-ON	= 10 Min  */
104 	1800,	/* ON-ON-OFF	= 30 Min  */
105 	3600,	/* ON-ON-ON	=  1 hour */
115 /* this is private data for each PCI-PC watchdog card */
125 	/* the PCI-device */
138 						delay-time from dip-switches */
142 	"(0<heartbeat<65536 or 0=delay-time from dip-switches, default="
154 static int send_command(int cmd, int *msb, int *lsb)  in send_command()  argument
159 		pr_debug("sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n",  in send_command()
160 			 cmd, *msb, *lsb);  in send_command()
166 	 * and MSB to port 5.  in send_command()
170 	outb_p(*msb, pcipcwd_private.io_addr + 5);  in send_command()
195 		*msb = inb_p(pcipcwd_private.io_addr + 5);  in send_command()
201 			pr_debug("received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n",  in send_command()
202 				 cmd, *msb, *lsb);  in send_command()
256 		pr_info("No previous trip detected - Cold boot or reset\n");  in pcipcwd_show_card_info()
272 		return -1;  in pcipcwd_start()
297 		return -1;  in pcipcwd_stop()
308 	/* Re-trigger watchdog by writing to port 0 */  in pcipcwd_keepalive()
325 		return -EINVAL;  in pcipcwd_set_heartbeat()
360 	int msb;  in pcipcwd_clear_status()  local
379 	msb = 0;  in pcipcwd_clear_status()
381 	send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter);  in pcipcwd_clear_status()
394 		return -ENODEV;  in pcipcwd_get_temperature()
415 	int msb;  in pcipcwd_get_timeleft()  local
420 	send_command(CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb);  in pcipcwd_get_timeleft()
422 	*time_left = (msb << 8) + lsb;  in pcipcwd_get_timeleft()
451 					return -EFAULT;  in pcipcwd_write()
480 		return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;  in pcipcwd_ioctl()
497 			return -EFAULT;  in pcipcwd_ioctl()
504 		int new_options, retval = -EINVAL;  in pcipcwd_ioctl()
507 			return -EFAULT;  in pcipcwd_ioctl()
511 				return -EIO;  in pcipcwd_ioctl()
517 				return -EIO;  in pcipcwd_ioctl()
538 			return -EFAULT;  in pcipcwd_ioctl()
541 			return -EINVAL;  in pcipcwd_ioctl()
555 			return -EFAULT;  in pcipcwd_ioctl()
561 		return -ENOTTY;  in pcipcwd_ioctl()
571 		return -EBUSY;  in pcipcwd_open()
606 		return -EFAULT;  in pcipcwd_temp_read()
609 		return -EFAULT;  in pcipcwd_temp_read()
617 		return -ENODEV;  in pcipcwd_temp_open()
683 	int ret = -EIO;  in pcipcwd_card_init()
691 		return -ENODEV;  in pcipcwd_card_init()
696 		return -ENODEV;  in pcipcwd_card_init()
700 		pr_err("No I/O-Address for card detected\n");  in pcipcwd_card_init()
701 		ret = -ENODEV;  in pcipcwd_card_init()
712 		ret = -EIO;  in pcipcwd_card_init()
731 	/* If heartbeat = 0 then we use the heartbeat from the dip-switches */  in pcipcwd_card_init()
796 	cards_found--;  in pcipcwd_card_exit()
816 MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver");