1/*
2 *	Berkshire PCI-PC Watchdog Card Driver
3 *
4 *	(c) Copyright 2003-2007 Wim Van Sebroeck <wim@iguana.be>.
5 *
6 *	Based on source code of the following authors:
7 *	  Ken Hollis <kenji@bitgate.com>,
8 *	  Lindsay Harris <lindsay@bluegum.com>,
9 *	  Alan Cox <alan@lxorguk.ukuu.org.uk>,
10 *	  Matt Domsch <Matt_Domsch@dell.com>,
11 *	  Rob Radez <rob@osinvestor.com>
12 *
13 *	This program is free software; you can redistribute it and/or
14 *	modify it under the terms of the GNU General Public License
15 *	as published by the Free Software Foundation; either version
16 *	2 of the License, or (at your option) any later version.
17 *
18 *	Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
19 *	provide warranty for any of this software. This material is
20 *	provided "AS-IS" and at no charge.
21 */
22
23/*
24 *	A bells and whistles driver is available from:
25 *	http://www.kernel.org/pub/linux/kernel/people/wim/pcwd/pcwd_pci/
26 *
27 *	More info available at
28 *	http://www.berkprod.com/ or http://www.pcwatchdog.com/
29 */
30
31/*
32 *	Includes, defines, variables, module parameters, ...
33 */
34
35#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36
37#include <linux/module.h>	/* For module specific items */
38#include <linux/moduleparam.h>	/* For new moduleparam's */
39#include <linux/types.h>	/* For standard types (like size_t) */
40#include <linux/errno.h>	/* For the -ENODEV/... values */
41#include <linux/kernel.h>	/* For printk/panic/... */
42#include <linux/delay.h>	/* For mdelay function */
43#include <linux/miscdevice.h>	/* For struct miscdevice */
44#include <linux/watchdog.h>	/* For the watchdog specific items */
45#include <linux/notifier.h>	/* For notifier support */
46#include <linux/reboot.h>	/* For reboot_notifier stuff */
47#include <linux/init.h>		/* For __init/__exit/... */
48#include <linux/fs.h>		/* For file operations */
49#include <linux/pci.h>		/* For pci functions */
50#include <linux/ioport.h>	/* For io-port access */
51#include <linux/spinlock.h>	/* For spin_lock/spin_unlock/... */
52#include <linux/uaccess.h>	/* For copy_to_user/put_user/... */
53#include <linux/io.h>		/* For inb/outb/... */
54
55/* Module and version information */
56#define WATCHDOG_VERSION "1.03"
57#define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog"
58#define WATCHDOG_NAME "pcwd_pci"
59#define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION
60
61/* Stuff for the PCI ID's  */
62#ifndef PCI_VENDOR_ID_QUICKLOGIC
63#define PCI_VENDOR_ID_QUICKLOGIC    0x11e3
64#endif
65
66#ifndef PCI_DEVICE_ID_WATCHDOG_PCIPCWD
67#define PCI_DEVICE_ID_WATCHDOG_PCIPCWD 0x5030
68#endif
69
70/*
71 * These are the defines that describe the control status bits for the
72 * PCI-PC Watchdog card.
73 */
74/* Port 1 : Control Status #1 */
75#define WD_PCI_WTRP		0x01	/* Watchdog Trip status */
76#define WD_PCI_HRBT		0x02	/* Watchdog Heartbeat */
77#define WD_PCI_TTRP		0x04	/* Temperature Trip status */
78#define WD_PCI_RL2A		0x08	/* Relay 2 Active */
79#define WD_PCI_RL1A		0x10	/* Relay 1 Active */
80#define WD_PCI_R2DS		0x40	/* Relay 2 Disable Temperature-trip /
81									reset */
82#define WD_PCI_RLY2		0x80	/* Activate Relay 2 on the board */
83/* Port 2 : Control Status #2 */
84#define WD_PCI_WDIS		0x10	/* Watchdog Disable */
85#define WD_PCI_ENTP		0x20	/* Enable Temperature Trip Reset */
86#define WD_PCI_WRSP		0x40	/* Watchdog wrote response */
87#define WD_PCI_PCMD		0x80	/* PC has sent command */
88
89/* according to documentation max. time to process a command for the pci
90 * watchdog card is 100 ms, so we give it 150 ms to do it's job */
91#define PCI_COMMAND_TIMEOUT	150
92
93/* Watchdog's internal commands */
94#define CMD_GET_STATUS				0x04
95#define CMD_GET_FIRMWARE_VERSION		0x08
96#define CMD_READ_WATCHDOG_TIMEOUT		0x18
97#define CMD_WRITE_WATCHDOG_TIMEOUT		0x19
98#define CMD_GET_CLEAR_RESET_COUNT		0x84
99
100/* Watchdog's Dip Switch heartbeat values */
101static const int heartbeat_tbl[] = {
102	5,	/* OFF-OFF-OFF	=  5 Sec  */
103	10,	/* OFF-OFF-ON	= 10 Sec  */
104	30,	/* OFF-ON-OFF	= 30 Sec  */
105	60,	/* OFF-ON-ON	=  1 Min  */
106	300,	/* ON-OFF-OFF	=  5 Min  */
107	600,	/* ON-OFF-ON	= 10 Min  */
108	1800,	/* ON-ON-OFF	= 30 Min  */
109	3600,	/* ON-ON-ON	=  1 hour */
110};
111
112/* We can only use 1 card due to the /dev/watchdog restriction */
113static int cards_found;
114
115/* internal variables */
116static int temp_panic;
117static unsigned long is_active;
118static char expect_release;
119/* this is private data for each PCI-PC watchdog card */
120static struct {
121	/* Wether or not the card has a temperature device */
122	int supports_temp;
123	/* The card's boot status */
124	int boot_status;
125	/* The cards I/O address */
126	unsigned long io_addr;
127	/* the lock for io operations */
128	spinlock_t io_lock;
129	/* the PCI-device */
130	struct pci_dev *pdev;
131} pcipcwd_private;
132
133/* module parameters */
134#define QUIET	0	/* Default */
135#define VERBOSE	1	/* Verbose */
136#define DEBUG	2	/* print fancy stuff too */
137static int debug = QUIET;
138module_param(debug, int, 0);
139MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
140
141#define WATCHDOG_HEARTBEAT 0	/* default heartbeat =
142						delay-time from dip-switches */
143static int heartbeat = WATCHDOG_HEARTBEAT;
144module_param(heartbeat, int, 0);
145MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. "
146	"(0<heartbeat<65536 or 0=delay-time from dip-switches, default="
147				__MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
148
149static bool nowayout = WATCHDOG_NOWAYOUT;
150module_param(nowayout, bool, 0);
151MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
152					__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
153
154/*
155 *	Internal functions
156 */
157
158static int send_command(int cmd, int *msb, int *lsb)
159{
160	int got_response, count;
161
162	if (debug >= DEBUG)
163		pr_debug("sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n",
164			 cmd, *msb, *lsb);
165
166	spin_lock(&pcipcwd_private.io_lock);
167	/* If a command requires data it should be written first.
168	 * Data for commands with 8 bits of data should be written to port 4.
169	 * Commands with 16 bits of data, should be written as LSB to port 4
170	 * and MSB to port 5.
171	 * After the required data has been written then write the command to
172	 * port 6. */
173	outb_p(*lsb, pcipcwd_private.io_addr + 4);
174	outb_p(*msb, pcipcwd_private.io_addr + 5);
175	outb_p(cmd, pcipcwd_private.io_addr + 6);
176
177	/* wait till the pci card processed the command, signaled by
178	 * the WRSP bit in port 2 and give it a max. timeout of
179	 * PCI_COMMAND_TIMEOUT to process */
180	got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
181	for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response);
182								count++) {
183		mdelay(1);
184		got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
185	}
186
187	if (debug >= DEBUG) {
188		if (got_response) {
189			pr_debug("time to process command was: %d ms\n",
190				 count);
191		} else {
192			pr_debug("card did not respond on command!\n");
193		}
194	}
195
196	if (got_response) {
197		/* read back response */
198		*lsb = inb_p(pcipcwd_private.io_addr + 4);
199		*msb = inb_p(pcipcwd_private.io_addr + 5);
200
201		/* clear WRSP bit */
202		inb_p(pcipcwd_private.io_addr + 6);
203
204		if (debug >= DEBUG)
205			pr_debug("received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n",
206				 cmd, *msb, *lsb);
207	}
208
209	spin_unlock(&pcipcwd_private.io_lock);
210
211	return got_response;
212}
213
214static inline void pcipcwd_check_temperature_support(void)
215{
216	if (inb_p(pcipcwd_private.io_addr) != 0xF0)
217		pcipcwd_private.supports_temp = 1;
218}
219
220static int pcipcwd_get_option_switches(void)
221{
222	int option_switches;
223
224	option_switches = inb_p(pcipcwd_private.io_addr + 3);
225	return option_switches;
226}
227
228static void pcipcwd_show_card_info(void)
229{
230	int got_fw_rev, fw_rev_major, fw_rev_minor;
231	char fw_ver_str[20];		/* The cards firmware version */
232	int option_switches;
233
234	got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major,
235								&fw_rev_minor);
236	if (got_fw_rev)
237		sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
238	else
239		sprintf(fw_ver_str, "<card no answer>");
240
241	/* Get switch settings */
242	option_switches = pcipcwd_get_option_switches();
243
244	pr_info("Found card at port 0x%04x (Firmware: %s) %s temp option\n",
245		(int) pcipcwd_private.io_addr, fw_ver_str,
246		(pcipcwd_private.supports_temp ? "with" : "without"));
247
248	pr_info("Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
249		option_switches,
250		((option_switches & 0x10) ? "ON" : "OFF"),
251		((option_switches & 0x08) ? "ON" : "OFF"));
252
253	if (pcipcwd_private.boot_status & WDIOF_CARDRESET)
254		pr_info("Previous reset was caused by the Watchdog card\n");
255
256	if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)
257		pr_info("Card sensed a CPU Overheat\n");
258
259	if (pcipcwd_private.boot_status == 0)
260		pr_info("No previous trip detected - Cold boot or reset\n");
261}
262
263static int pcipcwd_start(void)
264{
265	int stat_reg;
266
267	spin_lock(&pcipcwd_private.io_lock);
268	outb_p(0x00, pcipcwd_private.io_addr + 3);
269	udelay(1000);
270
271	stat_reg = inb_p(pcipcwd_private.io_addr + 2);
272	spin_unlock(&pcipcwd_private.io_lock);
273
274	if (stat_reg & WD_PCI_WDIS) {
275		pr_err("Card timer not enabled\n");
276		return -1;
277	}
278
279	if (debug >= VERBOSE)
280		pr_debug("Watchdog started\n");
281
282	return 0;
283}
284
285static int pcipcwd_stop(void)
286{
287	int stat_reg;
288
289	spin_lock(&pcipcwd_private.io_lock);
290	outb_p(0xA5, pcipcwd_private.io_addr + 3);
291	udelay(1000);
292
293	outb_p(0xA5, pcipcwd_private.io_addr + 3);
294	udelay(1000);
295
296	stat_reg = inb_p(pcipcwd_private.io_addr + 2);
297	spin_unlock(&pcipcwd_private.io_lock);
298
299	if (!(stat_reg & WD_PCI_WDIS)) {
300		pr_err("Card did not acknowledge disable attempt\n");
301		return -1;
302	}
303
304	if (debug >= VERBOSE)
305		pr_debug("Watchdog stopped\n");
306
307	return 0;
308}
309
310static int pcipcwd_keepalive(void)
311{
312	/* Re-trigger watchdog by writing to port 0 */
313	spin_lock(&pcipcwd_private.io_lock);
314	outb_p(0x42, pcipcwd_private.io_addr);	/* send out any data */
315	spin_unlock(&pcipcwd_private.io_lock);
316
317	if (debug >= DEBUG)
318		pr_debug("Watchdog keepalive signal send\n");
319
320	return 0;
321}
322
323static int pcipcwd_set_heartbeat(int t)
324{
325	int t_msb = t / 256;
326	int t_lsb = t % 256;
327
328	if ((t < 0x0001) || (t > 0xFFFF))
329		return -EINVAL;
330
331	/* Write new heartbeat to watchdog */
332	send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb);
333
334	heartbeat = t;
335	if (debug >= VERBOSE)
336		pr_debug("New heartbeat: %d\n", heartbeat);
337
338	return 0;
339}
340
341static int pcipcwd_get_status(int *status)
342{
343	int control_status;
344
345	*status = 0;
346	control_status = inb_p(pcipcwd_private.io_addr + 1);
347	if (control_status & WD_PCI_WTRP)
348		*status |= WDIOF_CARDRESET;
349	if (control_status & WD_PCI_TTRP) {
350		*status |= WDIOF_OVERHEAT;
351		if (temp_panic)
352			panic(KBUILD_MODNAME ": Temperature overheat trip!\n");
353	}
354
355	if (debug >= DEBUG)
356		pr_debug("Control Status #1: 0x%02x\n", control_status);
357
358	return 0;
359}
360
361static int pcipcwd_clear_status(void)
362{
363	int control_status;
364	int msb;
365	int reset_counter;
366
367	if (debug >= VERBOSE)
368		pr_info("clearing watchdog trip status & LED\n");
369
370	control_status = inb_p(pcipcwd_private.io_addr + 1);
371
372	if (debug >= DEBUG) {
373		pr_debug("status was: 0x%02x\n", control_status);
374		pr_debug("sending: 0x%02x\n",
375			 (control_status & WD_PCI_R2DS) | WD_PCI_WTRP);
376	}
377
378	/* clear trip status & LED and keep mode of relay 2 */
379	outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP,
380						pcipcwd_private.io_addr + 1);
381
382	/* clear reset counter */
383	msb = 0;
384	reset_counter = 0xff;
385	send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter);
386
387	if (debug >= DEBUG) {
388		pr_debug("reset count was: 0x%02x\n", reset_counter);
389	}
390
391	return 0;
392}
393
394static int pcipcwd_get_temperature(int *temperature)
395{
396	*temperature = 0;
397	if (!pcipcwd_private.supports_temp)
398		return -ENODEV;
399
400	spin_lock(&pcipcwd_private.io_lock);
401	*temperature = inb_p(pcipcwd_private.io_addr);
402	spin_unlock(&pcipcwd_private.io_lock);
403
404	/*
405	 * Convert celsius to fahrenheit, since this was
406	 * the decided 'standard' for this return value.
407	 */
408	*temperature = (*temperature * 9 / 5) + 32;
409
410	if (debug >= DEBUG) {
411		pr_debug("temperature is: %d F\n", *temperature);
412	}
413
414	return 0;
415}
416
417static int pcipcwd_get_timeleft(int *time_left)
418{
419	int msb;
420	int lsb;
421
422	/* Read the time that's left before rebooting */
423	/* Note: if the board is not yet armed then we will read 0xFFFF */
424	send_command(CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb);
425
426	*time_left = (msb << 8) + lsb;
427
428	if (debug >= VERBOSE)
429		pr_debug("Time left before next reboot: %d\n", *time_left);
430
431	return 0;
432}
433
434/*
435 *	/dev/watchdog handling
436 */
437
438static ssize_t pcipcwd_write(struct file *file, const char __user *data,
439			     size_t len, loff_t *ppos)
440{
441	/* See if we got the magic character 'V' and reload the timer */
442	if (len) {
443		if (!nowayout) {
444			size_t i;
445
446			/* note: just in case someone wrote the magic character
447			 * five months ago... */
448			expect_release = 0;
449
450			/* scan to see whether or not we got the
451			 * magic character */
452			for (i = 0; i != len; i++) {
453				char c;
454				if (get_user(c, data + i))
455					return -EFAULT;
456				if (c == 'V')
457					expect_release = 42;
458			}
459		}
460
461		/* someone wrote to us, we should reload the timer */
462		pcipcwd_keepalive();
463	}
464	return len;
465}
466
467static long pcipcwd_ioctl(struct file *file, unsigned int cmd,
468						unsigned long arg)
469{
470	void __user *argp = (void __user *)arg;
471	int __user *p = argp;
472	static const struct watchdog_info ident = {
473		.options =		WDIOF_OVERHEAT |
474					WDIOF_CARDRESET |
475					WDIOF_KEEPALIVEPING |
476					WDIOF_SETTIMEOUT |
477					WDIOF_MAGICCLOSE,
478		.firmware_version =	1,
479		.identity =		WATCHDOG_DRIVER_NAME,
480	};
481
482	switch (cmd) {
483	case WDIOC_GETSUPPORT:
484		return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
485
486	case WDIOC_GETSTATUS:
487	{
488		int status;
489		pcipcwd_get_status(&status);
490		return put_user(status, p);
491	}
492
493	case WDIOC_GETBOOTSTATUS:
494		return put_user(pcipcwd_private.boot_status, p);
495
496	case WDIOC_GETTEMP:
497	{
498		int temperature;
499
500		if (pcipcwd_get_temperature(&temperature))
501			return -EFAULT;
502
503		return put_user(temperature, p);
504	}
505
506	case WDIOC_SETOPTIONS:
507	{
508		int new_options, retval = -EINVAL;
509
510		if (get_user(new_options, p))
511			return -EFAULT;
512
513		if (new_options & WDIOS_DISABLECARD) {
514			if (pcipcwd_stop())
515				return -EIO;
516			retval = 0;
517		}
518
519		if (new_options & WDIOS_ENABLECARD) {
520			if (pcipcwd_start())
521				return -EIO;
522			retval = 0;
523		}
524
525		if (new_options & WDIOS_TEMPPANIC) {
526			temp_panic = 1;
527			retval = 0;
528		}
529
530		return retval;
531	}
532
533	case WDIOC_KEEPALIVE:
534		pcipcwd_keepalive();
535		return 0;
536
537	case WDIOC_SETTIMEOUT:
538	{
539		int new_heartbeat;
540
541		if (get_user(new_heartbeat, p))
542			return -EFAULT;
543
544		if (pcipcwd_set_heartbeat(new_heartbeat))
545			return -EINVAL;
546
547		pcipcwd_keepalive();
548		/* Fall */
549	}
550
551	case WDIOC_GETTIMEOUT:
552		return put_user(heartbeat, p);
553
554	case WDIOC_GETTIMELEFT:
555	{
556		int time_left;
557
558		if (pcipcwd_get_timeleft(&time_left))
559			return -EFAULT;
560
561		return put_user(time_left, p);
562	}
563
564	default:
565		return -ENOTTY;
566	}
567}
568
569static int pcipcwd_open(struct inode *inode, struct file *file)
570{
571	/* /dev/watchdog can only be opened once */
572	if (test_and_set_bit(0, &is_active)) {
573		if (debug >= VERBOSE)
574			pr_err("Attempt to open already opened device\n");
575		return -EBUSY;
576	}
577
578	/* Activate */
579	pcipcwd_start();
580	pcipcwd_keepalive();
581	return nonseekable_open(inode, file);
582}
583
584static int pcipcwd_release(struct inode *inode, struct file *file)
585{
586	/*
587	 *      Shut off the timer.
588	 */
589	if (expect_release == 42) {
590		pcipcwd_stop();
591	} else {
592		pr_crit("Unexpected close, not stopping watchdog!\n");
593		pcipcwd_keepalive();
594	}
595	expect_release = 0;
596	clear_bit(0, &is_active);
597	return 0;
598}
599
600/*
601 *	/dev/temperature handling
602 */
603
604static ssize_t pcipcwd_temp_read(struct file *file, char __user *data,
605				size_t len, loff_t *ppos)
606{
607	int temperature;
608
609	if (pcipcwd_get_temperature(&temperature))
610		return -EFAULT;
611
612	if (copy_to_user(data, &temperature, 1))
613		return -EFAULT;
614
615	return 1;
616}
617
618static int pcipcwd_temp_open(struct inode *inode, struct file *file)
619{
620	if (!pcipcwd_private.supports_temp)
621		return -ENODEV;
622
623	return nonseekable_open(inode, file);
624}
625
626static int pcipcwd_temp_release(struct inode *inode, struct file *file)
627{
628	return 0;
629}
630
631/*
632 *	Notify system
633 */
634
635static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code,
636								void *unused)
637{
638	if (code == SYS_DOWN || code == SYS_HALT)
639		pcipcwd_stop();	/* Turn the WDT off */
640
641	return NOTIFY_DONE;
642}
643
644/*
645 *	Kernel Interfaces
646 */
647
648static const struct file_operations pcipcwd_fops = {
649	.owner =	THIS_MODULE,
650	.llseek =	no_llseek,
651	.write =	pcipcwd_write,
652	.unlocked_ioctl = pcipcwd_ioctl,
653	.open =		pcipcwd_open,
654	.release =	pcipcwd_release,
655};
656
657static struct miscdevice pcipcwd_miscdev = {
658	.minor =	WATCHDOG_MINOR,
659	.name =		"watchdog",
660	.fops =		&pcipcwd_fops,
661};
662
663static const struct file_operations pcipcwd_temp_fops = {
664	.owner =	THIS_MODULE,
665	.llseek =	no_llseek,
666	.read =		pcipcwd_temp_read,
667	.open =		pcipcwd_temp_open,
668	.release =	pcipcwd_temp_release,
669};
670
671static struct miscdevice pcipcwd_temp_miscdev = {
672	.minor =	TEMP_MINOR,
673	.name =		"temperature",
674	.fops =		&pcipcwd_temp_fops,
675};
676
677static struct notifier_block pcipcwd_notifier = {
678	.notifier_call =	pcipcwd_notify_sys,
679};
680
681/*
682 *	Init & exit routines
683 */
684
685static int pcipcwd_card_init(struct pci_dev *pdev,
686		const struct pci_device_id *ent)
687{
688	int ret = -EIO;
689
690	cards_found++;
691	if (cards_found == 1)
692		pr_info("%s\n", DRIVER_VERSION);
693
694	if (cards_found > 1) {
695		pr_err("This driver only supports 1 device\n");
696		return -ENODEV;
697	}
698
699	if (pci_enable_device(pdev)) {
700		pr_err("Not possible to enable PCI Device\n");
701		return -ENODEV;
702	}
703
704	if (pci_resource_start(pdev, 0) == 0x0000) {
705		pr_err("No I/O-Address for card detected\n");
706		ret = -ENODEV;
707		goto err_out_disable_device;
708	}
709
710	spin_lock_init(&pcipcwd_private.io_lock);
711	pcipcwd_private.pdev = pdev;
712	pcipcwd_private.io_addr = pci_resource_start(pdev, 0);
713
714	if (pci_request_regions(pdev, WATCHDOG_NAME)) {
715		pr_err("I/O address 0x%04x already in use\n",
716		       (int) pcipcwd_private.io_addr);
717		ret = -EIO;
718		goto err_out_disable_device;
719	}
720
721	/* get the boot_status */
722	pcipcwd_get_status(&pcipcwd_private.boot_status);
723
724	/* clear the "card caused reboot" flag */
725	pcipcwd_clear_status();
726
727	/* disable card */
728	pcipcwd_stop();
729
730	/* Check whether or not the card supports the temperature device */
731	pcipcwd_check_temperature_support();
732
733	/* Show info about the card itself */
734	pcipcwd_show_card_info();
735
736	/* If heartbeat = 0 then we use the heartbeat from the dip-switches */
737	if (heartbeat == 0)
738		heartbeat =
739			heartbeat_tbl[(pcipcwd_get_option_switches() & 0x07)];
740
741	/* Check that the heartbeat value is within it's range ;
742	 * if not reset to the default */
743	if (pcipcwd_set_heartbeat(heartbeat)) {
744		pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT);
745		pr_info("heartbeat value must be 0<heartbeat<65536, using %d\n",
746			WATCHDOG_HEARTBEAT);
747	}
748
749	ret = register_reboot_notifier(&pcipcwd_notifier);
750	if (ret != 0) {
751		pr_err("cannot register reboot notifier (err=%d)\n", ret);
752		goto err_out_release_region;
753	}
754
755	if (pcipcwd_private.supports_temp) {
756		ret = misc_register(&pcipcwd_temp_miscdev);
757		if (ret != 0) {
758			pr_err("cannot register miscdev on minor=%d (err=%d)\n",
759			       TEMP_MINOR, ret);
760			goto err_out_unregister_reboot;
761		}
762	}
763
764	ret = misc_register(&pcipcwd_miscdev);
765	if (ret != 0) {
766		pr_err("cannot register miscdev on minor=%d (err=%d)\n",
767		       WATCHDOG_MINOR, ret);
768		goto err_out_misc_deregister;
769	}
770
771	pr_info("initialized. heartbeat=%d sec (nowayout=%d)\n",
772		heartbeat, nowayout);
773
774	return 0;
775
776err_out_misc_deregister:
777	if (pcipcwd_private.supports_temp)
778		misc_deregister(&pcipcwd_temp_miscdev);
779err_out_unregister_reboot:
780	unregister_reboot_notifier(&pcipcwd_notifier);
781err_out_release_region:
782	pci_release_regions(pdev);
783err_out_disable_device:
784	pci_disable_device(pdev);
785	return ret;
786}
787
788static void pcipcwd_card_exit(struct pci_dev *pdev)
789{
790	/* Stop the timer before we leave */
791	if (!nowayout)
792		pcipcwd_stop();
793
794	/* Deregister */
795	misc_deregister(&pcipcwd_miscdev);
796	if (pcipcwd_private.supports_temp)
797		misc_deregister(&pcipcwd_temp_miscdev);
798	unregister_reboot_notifier(&pcipcwd_notifier);
799	pci_release_regions(pdev);
800	pci_disable_device(pdev);
801	cards_found--;
802}
803
804static const struct pci_device_id pcipcwd_pci_tbl[] = {
805	{ PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD,
806		PCI_ANY_ID, PCI_ANY_ID, },
807	{ 0 },			/* End of list */
808};
809MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl);
810
811static struct pci_driver pcipcwd_driver = {
812	.name		= WATCHDOG_NAME,
813	.id_table	= pcipcwd_pci_tbl,
814	.probe		= pcipcwd_card_init,
815	.remove		= pcipcwd_card_exit,
816};
817
818module_pci_driver(pcipcwd_driver);
819
820MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>");
821MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver");
822MODULE_LICENSE("GPL");
823