Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * PC Watchdog Driver | |
3 | * by Ken Hollis (khollis@bitgate.com) | |
4 | * | |
f9146f26 | 5 | * Permission granted from Simon Machell (smachell@berkprod.com) |
1da177e4 LT |
6 | * Written for the Linux Kernel, and GPLed by Ken Hollis |
7 | * | |
8 | * 960107 Added request_region routines, modulized the whole thing. | |
9 | * 960108 Fixed end-of-file pointer (Thanks to Dan Hollis), added | |
10 | * WD_TIMEOUT define. | |
11 | * 960216 Added eof marker on the file, and changed verbose messages. | |
12 | * 960716 Made functional and cosmetic changes to the source for | |
13 | * inclusion in Linux 2.0.x kernels, thanks to Alan Cox. | |
14 | * 960717 Removed read/seek routines, replaced with ioctl. Also, added | |
15 | * check_region command due to Alan's suggestion. | |
16 | * 960821 Made changes to compile in newer 2.0.x kernels. Added | |
17 | * "cold reboot sense" entry. | |
18 | * 960825 Made a few changes to code, deleted some defines and made | |
19 | * typedefs to replace them. Made heartbeat reset only available | |
20 | * via ioctl, and removed the write routine. | |
21 | * 960828 Added new items for PC Watchdog Rev.C card. | |
22 | * 960829 Changed around all of the IOCTLs, added new features, | |
23 | * added watchdog disable/re-enable routines. Added firmware | |
24 | * version reporting. Added read routine for temperature. | |
25 | * Removed some extra defines, added an autodetect Revision | |
26 | * routine. | |
27 | * 961006 Revised some documentation, fixed some cosmetic bugs. Made | |
28 | * drivers to panic the system if it's overheating at bootup. | |
29 | * 961118 Changed some verbiage on some of the output, tidied up | |
30 | * code bits, and added compatibility to 2.1.x. | |
31 | * 970912 Enabled board on open and disable on close. | |
32 | * 971107 Took account of recent VFS changes (broke read). | |
33 | * 971210 Disable board on initialisation in case board already ticking. | |
34 | * 971222 Changed open/close for temperature handling | |
35 | * Michael Meskes <meskes@debian.org>. | |
36 | * 980112 Used minor numbers from include/linux/miscdevice.h | |
37 | * 990403 Clear reset status after reading control status register in | |
38 | * pcwd_showprevstate(). [Marc Boucher <marc@mbsi.ca>] | |
39 | * 990605 Made changes to code to support Firmware 1.22a, added | |
40 | * fairly useless proc entry. | |
41 | * 990610 removed said useless proc code for the merge <alan> | |
42 | * 000403 Removed last traces of proc code. <davej> | |
261dcc70 AC |
43 | * 011214 Added nowayout module option to override |
44 | * CONFIG_WATCHDOG_NOWAYOUT <Matt_Domsch@dell.com> | |
1da177e4 LT |
45 | * Added timeout module option to override default |
46 | */ | |
47 | ||
48 | /* | |
49 | * A bells and whistles driver is available from http://www.pcwd.de/ | |
261dcc70 AC |
50 | * More info available at http://www.berkprod.com/ or |
51 | * http://www.pcwatchdog.com/ | |
1da177e4 LT |
52 | */ |
53 | ||
fd41fa61 WVS |
54 | #include <linux/module.h> /* For module specific items */ |
55 | #include <linux/moduleparam.h> /* For new moduleparam's */ | |
56 | #include <linux/types.h> /* For standard types (like size_t) */ | |
57 | #include <linux/errno.h> /* For the -ENODEV/... values */ | |
58 | #include <linux/kernel.h> /* For printk/panic/... */ | |
59 | #include <linux/delay.h> /* For mdelay function */ | |
60 | #include <linux/timer.h> /* For timer related operations */ | |
61 | #include <linux/jiffies.h> /* For jiffies stuff */ | |
62 | #include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */ | |
63 | #include <linux/watchdog.h> /* For the watchdog specific items */ | |
5aa15050 | 64 | #include <linux/reboot.h> /* For kernel_power_off() */ |
fd41fa61 WVS |
65 | #include <linux/init.h> /* For __init/__exit/... */ |
66 | #include <linux/fs.h> /* For file operations */ | |
5aa15050 | 67 | #include <linux/isa.h> /* For isa devices */ |
fd41fa61 WVS |
68 | #include <linux/ioport.h> /* For io-port access */ |
69 | #include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */ | |
261dcc70 AC |
70 | #include <linux/uaccess.h> /* For copy_to_user/put_user/... */ |
71 | #include <linux/io.h> /* For inb/outb/... */ | |
fd41fa61 WVS |
72 | |
73 | /* Module and version information */ | |
5aa15050 WVS |
74 | #define WATCHDOG_VERSION "1.20" |
75 | #define WATCHDOG_DATE "18 Feb 2007" | |
a7122f91 WVS |
76 | #define WATCHDOG_DRIVER_NAME "ISA-PC Watchdog" |
77 | #define WATCHDOG_NAME "pcwd" | |
78 | #define PFX WATCHDOG_NAME ": " | |
79 | #define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n" | |
80 | #define WD_VER WATCHDOG_VERSION " (" WATCHDOG_DATE ")" | |
1da177e4 LT |
81 | |
82 | /* | |
83 | * It should be noted that PCWD_REVISION_B was removed because A and B | |
84 | * are essentially the same types of card, with the exception that B | |
85 | * has temperature reporting. Since I didn't receive a Rev.B card, | |
86 | * the Rev.B card is not supported. (It's a good thing too, as they | |
87 | * are no longer in production.) | |
88 | */ | |
89 | #define PCWD_REVISION_A 1 | |
90 | #define PCWD_REVISION_C 2 | |
91 | ||
5aa15050 WVS |
92 | /* |
93 | * These are the auto-probe addresses available. | |
94 | * | |
95 | * Revision A only uses ports 0x270 and 0x370. Revision C introduced 0x350. | |
96 | * Revision A has an address range of 2 addresses, while Revision C has 4. | |
97 | */ | |
98 | #define PCWD_ISA_NR_CARDS 3 | |
99 | static int pcwd_ioports[] = { 0x270, 0x350, 0x370, 0x000 }; | |
100 | ||
1da177e4 | 101 | /* |
8f0235dc WVS |
102 | * These are the defines that describe the control status bits for the |
103 | * PCI-PC Watchdog card. | |
104 | */ | |
105 | /* Port 1 : Control Status #1 for the PC Watchdog card, revision A. */ | |
4206f0c4 WVS |
106 | #define WD_WDRST 0x01 /* Previously reset state */ |
107 | #define WD_T110 0x02 /* Temperature overheat sense */ | |
108 | #define WD_HRTBT 0x04 /* Heartbeat sense */ | |
109 | #define WD_RLY2 0x08 /* External relay triggered */ | |
110 | #define WD_SRLY2 0x80 /* Software external relay triggered */ | |
8f0235dc | 111 | /* Port 1 : Control Status #1 for the PC Watchdog card, revision C. */ |
4206f0c4 WVS |
112 | #define WD_REVC_WTRP 0x01 /* Watchdog Trip status */ |
113 | #define WD_REVC_HRBT 0x02 /* Watchdog Heartbeat */ | |
114 | #define WD_REVC_TTRP 0x04 /* Temperature Trip status */ | |
261dcc70 AC |
115 | #define WD_REVC_RL2A 0x08 /* Relay 2 activated by |
116 | on-board processor */ | |
4206f0c4 WVS |
117 | #define WD_REVC_RL1A 0x10 /* Relay 1 active */ |
118 | #define WD_REVC_R2DS 0x40 /* Relay 2 disable */ | |
119 | #define WD_REVC_RLY2 0x80 /* Relay 2 activated? */ | |
8f0235dc WVS |
120 | /* Port 2 : Control Status #2 */ |
121 | #define WD_WDIS 0x10 /* Watchdog Disabled */ | |
122 | #define WD_ENTP 0x20 /* Watchdog Enable Temperature Trip */ | |
261dcc70 AC |
123 | #define WD_SSEL 0x40 /* Watchdog Switch Select |
124 | (1:SW1 <-> 0:SW2) */ | |
8f0235dc | 125 | #define WD_WCMD 0x80 /* Watchdog Command Mode */ |
1da177e4 LT |
126 | |
127 | /* max. time we give an ISA watchdog card to process a command */ | |
128 | /* 500ms for each 4 bit response (according to spec.) */ | |
129 | #define ISA_COMMAND_TIMEOUT 1000 | |
130 | ||
131 | /* Watchdog's internal commands */ | |
fd41fa61 WVS |
132 | #define CMD_ISA_IDLE 0x00 |
133 | #define CMD_ISA_VERSION_INTEGER 0x01 | |
134 | #define CMD_ISA_VERSION_TENTH 0x02 | |
135 | #define CMD_ISA_VERSION_HUNDRETH 0x03 | |
136 | #define CMD_ISA_VERSION_MINOR 0x04 | |
137 | #define CMD_ISA_SWITCH_SETTINGS 0x05 | |
369fa252 WVS |
138 | #define CMD_ISA_RESET_PC 0x06 |
139 | #define CMD_ISA_ARM_0 0x07 | |
140 | #define CMD_ISA_ARM_30 0x08 | |
141 | #define CMD_ISA_ARM_60 0x09 | |
fd41fa61 WVS |
142 | #define CMD_ISA_DELAY_TIME_2SECS 0x0A |
143 | #define CMD_ISA_DELAY_TIME_4SECS 0x0B | |
144 | #define CMD_ISA_DELAY_TIME_8SECS 0x0C | |
369fa252 | 145 | #define CMD_ISA_RESET_RELAYS 0x0D |
1da177e4 | 146 | |
f3dc0733 | 147 | /* Watchdog's Dip Switch heartbeat values */ |
7944d3a5 | 148 | static const int heartbeat_tbl[] = { |
f3dc0733 WVS |
149 | 20, /* OFF-OFF-OFF = 20 Sec */ |
150 | 40, /* OFF-OFF-ON = 40 Sec */ | |
151 | 60, /* OFF-ON-OFF = 1 Min */ | |
152 | 300, /* OFF-ON-ON = 5 Min */ | |
153 | 600, /* ON-OFF-OFF = 10 Min */ | |
154 | 1800, /* ON-OFF-ON = 30 Min */ | |
155 | 3600, /* ON-ON-OFF = 1 Hour */ | |
156 | 7200, /* ON-ON-ON = 2 hour */ | |
157 | }; | |
158 | ||
1da177e4 LT |
159 | /* |
160 | * We are using an kernel timer to do the pinging of the watchdog | |
161 | * every ~500ms. We try to set the internal heartbeat of the | |
162 | * watchdog to 2 ms. | |
163 | */ | |
164 | ||
165 | #define WDT_INTERVAL (HZ/2+1) | |
166 | ||
167 | /* We can only use 1 card due to the /dev/watchdog restriction */ | |
168 | static int cards_found; | |
169 | ||
170 | /* internal variables */ | |
36cbaa87 | 171 | static unsigned long open_allowed; |
1da177e4 | 172 | static char expect_close; |
1da177e4 | 173 | static int temp_panic; |
261dcc70 AC |
174 | |
175 | /* this is private data for each ISA-PC watchdog card */ | |
176 | static struct { | |
2891b6ad | 177 | char fw_ver_str[6]; /* The cards firmware version */ |
a2be8786 | 178 | int revision; /* The card's revision */ |
261dcc70 AC |
179 | int supports_temp; /* Whether or not the card has |
180 | a temperature device */ | |
181 | int command_mode; /* Whether or not the card is in | |
182 | command mode */ | |
a2be8786 WVS |
183 | int boot_status; /* The card's boot status */ |
184 | int io_addr; /* The cards I/O address */ | |
185 | spinlock_t io_lock; /* the lock for io operations */ | |
186 | struct timer_list timer; /* The timer that pings the watchdog */ | |
187 | unsigned long next_heartbeat; /* the next_heartbeat for the timer */ | |
188 | } pcwd_private; | |
1da177e4 LT |
189 | |
190 | /* module parameters */ | |
c324ab42 WVS |
191 | #define QUIET 0 /* Default */ |
192 | #define VERBOSE 1 /* Verbose */ | |
193 | #define DEBUG 2 /* print fancy stuff too */ | |
194 | static int debug = QUIET; | |
195 | module_param(debug, int, 0); | |
261dcc70 AC |
196 | MODULE_PARM_DESC(debug, |
197 | "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)"); | |
c324ab42 | 198 | |
261dcc70 AC |
199 | /* default heartbeat = delay-time from dip-switches */ |
200 | #define WATCHDOG_HEARTBEAT 0 | |
1da177e4 LT |
201 | static int heartbeat = WATCHDOG_HEARTBEAT; |
202 | module_param(heartbeat, int, 0); | |
261dcc70 | 203 | MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2 <= heartbeat <= 7200 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); |
1da177e4 | 204 | |
4bfdf378 | 205 | static int nowayout = WATCHDOG_NOWAYOUT; |
1da177e4 | 206 | module_param(nowayout, int, 0); |
261dcc70 AC |
207 | MODULE_PARM_DESC(nowayout, |
208 | "Watchdog cannot be stopped once started (default=" | |
209 | __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); | |
1da177e4 LT |
210 | |
211 | /* | |
212 | * Internal functions | |
213 | */ | |
214 | ||
215 | static int send_isa_command(int cmd) | |
216 | { | |
217 | int i; | |
218 | int control_status; | |
219 | int port0, last_port0; /* Double read for stabilising */ | |
220 | ||
c324ab42 WVS |
221 | if (debug >= DEBUG) |
222 | printk(KERN_DEBUG PFX "sending following data cmd=0x%02x\n", | |
223 | cmd); | |
224 | ||
1da177e4 | 225 | /* The WCMD bit must be 1 and the command is only 4 bits in size */ |
8f0235dc | 226 | control_status = (cmd & 0x0F) | WD_WCMD; |
a2be8786 | 227 | outb_p(control_status, pcwd_private.io_addr + 2); |
1da177e4 LT |
228 | udelay(ISA_COMMAND_TIMEOUT); |
229 | ||
a2be8786 | 230 | port0 = inb_p(pcwd_private.io_addr); |
1da177e4 LT |
231 | for (i = 0; i < 25; ++i) { |
232 | last_port0 = port0; | |
a2be8786 | 233 | port0 = inb_p(pcwd_private.io_addr); |
1da177e4 LT |
234 | |
235 | if (port0 == last_port0) | |
236 | break; /* Data is stable */ | |
237 | ||
261dcc70 | 238 | udelay(250); |
1da177e4 LT |
239 | } |
240 | ||
c324ab42 WVS |
241 | if (debug >= DEBUG) |
242 | printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: port0=0x%02x last_port0=0x%02x\n", | |
243 | cmd, port0, last_port0); | |
244 | ||
1da177e4 LT |
245 | return port0; |
246 | } | |
247 | ||
248 | static int set_command_mode(void) | |
249 | { | |
261dcc70 | 250 | int i, found = 0, count = 0; |
1da177e4 LT |
251 | |
252 | /* Set the card into command mode */ | |
a2be8786 | 253 | spin_lock(&pcwd_private.io_lock); |
1da177e4 LT |
254 | while ((!found) && (count < 3)) { |
255 | i = send_isa_command(CMD_ISA_IDLE); | |
256 | ||
257 | if (i == 0x00) | |
258 | found = 1; | |
259 | else if (i == 0xF3) { | |
260 | /* Card does not like what we've done to it */ | |
a2be8786 | 261 | outb_p(0x00, pcwd_private.io_addr + 2); |
1da177e4 | 262 | udelay(1200); /* Spec says wait 1ms */ |
a2be8786 | 263 | outb_p(0x00, pcwd_private.io_addr + 2); |
1da177e4 LT |
264 | udelay(ISA_COMMAND_TIMEOUT); |
265 | } | |
266 | count++; | |
267 | } | |
a2be8786 WVS |
268 | spin_unlock(&pcwd_private.io_lock); |
269 | pcwd_private.command_mode = found; | |
1da177e4 | 270 | |
c324ab42 WVS |
271 | if (debug >= DEBUG) |
272 | printk(KERN_DEBUG PFX "command_mode=%d\n", | |
273 | pcwd_private.command_mode); | |
274 | ||
7944d3a5 | 275 | return found; |
1da177e4 LT |
276 | } |
277 | ||
278 | static void unset_command_mode(void) | |
279 | { | |
280 | /* Set the card into normal mode */ | |
a2be8786 WVS |
281 | spin_lock(&pcwd_private.io_lock); |
282 | outb_p(0x00, pcwd_private.io_addr + 2); | |
1da177e4 | 283 | udelay(ISA_COMMAND_TIMEOUT); |
a2be8786 | 284 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 | 285 | |
a2be8786 | 286 | pcwd_private.command_mode = 0; |
c324ab42 WVS |
287 | |
288 | if (debug >= DEBUG) | |
289 | printk(KERN_DEBUG PFX "command_mode=%d\n", | |
290 | pcwd_private.command_mode); | |
1da177e4 LT |
291 | } |
292 | ||
85875211 WVS |
293 | static inline void pcwd_check_temperature_support(void) |
294 | { | |
295 | if (inb(pcwd_private.io_addr) != 0xF0) | |
296 | pcwd_private.supports_temp = 1; | |
297 | } | |
298 | ||
2891b6ad | 299 | static inline void pcwd_get_firmware(void) |
af3b38d9 WVS |
300 | { |
301 | int one, ten, hund, minor; | |
af3b38d9 | 302 | |
6bbc20bc | 303 | strcpy(pcwd_private.fw_ver_str, "ERROR"); |
af3b38d9 WVS |
304 | |
305 | if (set_command_mode()) { | |
306 | one = send_isa_command(CMD_ISA_VERSION_INTEGER); | |
307 | ten = send_isa_command(CMD_ISA_VERSION_TENTH); | |
308 | hund = send_isa_command(CMD_ISA_VERSION_HUNDRETH); | |
309 | minor = send_isa_command(CMD_ISA_VERSION_MINOR); | |
261dcc70 AC |
310 | sprintf(pcwd_private.fw_ver_str, "%c.%c%c%c", |
311 | one, ten, hund, minor); | |
af3b38d9 | 312 | } |
af3b38d9 | 313 | unset_command_mode(); |
2891b6ad WVS |
314 | |
315 | return; | |
af3b38d9 WVS |
316 | } |
317 | ||
318 | static inline int pcwd_get_option_switches(void) | |
319 | { | |
261dcc70 | 320 | int option_switches = 0; |
af3b38d9 WVS |
321 | |
322 | if (set_command_mode()) { | |
323 | /* Get switch settings */ | |
324 | option_switches = send_isa_command(CMD_ISA_SWITCH_SETTINGS); | |
325 | } | |
326 | ||
327 | unset_command_mode(); | |
7944d3a5 | 328 | return option_switches; |
af3b38d9 WVS |
329 | } |
330 | ||
331 | static void pcwd_show_card_info(void) | |
332 | { | |
af3b38d9 WVS |
333 | int option_switches; |
334 | ||
335 | /* Get some extra info from the hardware (in command/debug/diag mode) */ | |
336 | if (pcwd_private.revision == PCWD_REVISION_A) | |
261dcc70 AC |
337 | printk(KERN_INFO PFX |
338 | "ISA-PC Watchdog (REV.A) detected at port 0x%04x\n", | |
339 | pcwd_private.io_addr); | |
af3b38d9 | 340 | else if (pcwd_private.revision == PCWD_REVISION_C) { |
2891b6ad | 341 | pcwd_get_firmware(); |
af3b38d9 | 342 | printk(KERN_INFO PFX "ISA-PC Watchdog (REV.C) detected at port 0x%04x (Firmware version: %s)\n", |
2891b6ad | 343 | pcwd_private.io_addr, pcwd_private.fw_ver_str); |
af3b38d9 WVS |
344 | option_switches = pcwd_get_option_switches(); |
345 | printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n", | |
346 | option_switches, | |
347 | ((option_switches & 0x10) ? "ON" : "OFF"), | |
348 | ((option_switches & 0x08) ? "ON" : "OFF")); | |
349 | ||
350 | /* Reprogram internal heartbeat to 2 seconds */ | |
351 | if (set_command_mode()) { | |
352 | send_isa_command(CMD_ISA_DELAY_TIME_2SECS); | |
353 | unset_command_mode(); | |
354 | } | |
355 | } | |
356 | ||
357 | if (pcwd_private.supports_temp) | |
358 | printk(KERN_INFO PFX "Temperature Option Detected\n"); | |
359 | ||
360 | if (pcwd_private.boot_status & WDIOF_CARDRESET) | |
361 | printk(KERN_INFO PFX "Previous reboot was caused by the card\n"); | |
362 | ||
363 | if (pcwd_private.boot_status & WDIOF_OVERHEAT) { | |
261dcc70 AC |
364 | printk(KERN_EMERG PFX |
365 | "Card senses a CPU Overheat. Panicking!\n"); | |
366 | printk(KERN_EMERG PFX | |
367 | "CPU Overheat\n"); | |
af3b38d9 WVS |
368 | } |
369 | ||
370 | if (pcwd_private.boot_status == 0) | |
261dcc70 AC |
371 | printk(KERN_INFO PFX |
372 | "No previous trip detected - Cold boot or reset\n"); | |
af3b38d9 WVS |
373 | } |
374 | ||
1da177e4 LT |
375 | static void pcwd_timer_ping(unsigned long data) |
376 | { | |
377 | int wdrst_stat; | |
378 | ||
379 | /* If we got a heartbeat pulse within the WDT_INTERVAL | |
380 | * we agree to ping the WDT */ | |
261dcc70 | 381 | if (time_before(jiffies, pcwd_private.next_heartbeat)) { |
1da177e4 | 382 | /* Ping the watchdog */ |
a2be8786 WVS |
383 | spin_lock(&pcwd_private.io_lock); |
384 | if (pcwd_private.revision == PCWD_REVISION_A) { | |
261dcc70 AC |
385 | /* Rev A cards are reset by setting the |
386 | WD_WDRST bit in register 1 */ | |
a2be8786 | 387 | wdrst_stat = inb_p(pcwd_private.io_addr); |
1da177e4 LT |
388 | wdrst_stat &= 0x0F; |
389 | wdrst_stat |= WD_WDRST; | |
390 | ||
a2be8786 | 391 | outb_p(wdrst_stat, pcwd_private.io_addr + 1); |
1da177e4 LT |
392 | } else { |
393 | /* Re-trigger watchdog by writing to port 0 */ | |
a2be8786 | 394 | outb_p(0x00, pcwd_private.io_addr); |
1da177e4 LT |
395 | } |
396 | ||
397 | /* Re-set the timer interval */ | |
a2be8786 | 398 | mod_timer(&pcwd_private.timer, jiffies + WDT_INTERVAL); |
1da177e4 | 399 | |
a2be8786 | 400 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 | 401 | } else { |
261dcc70 AC |
402 | printk(KERN_WARNING PFX |
403 | "Heartbeat lost! Will not ping the watchdog\n"); | |
1da177e4 LT |
404 | } |
405 | } | |
406 | ||
407 | static int pcwd_start(void) | |
408 | { | |
409 | int stat_reg; | |
410 | ||
a2be8786 | 411 | pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ); |
1da177e4 LT |
412 | |
413 | /* Start the timer */ | |
a2be8786 | 414 | mod_timer(&pcwd_private.timer, jiffies + WDT_INTERVAL); |
1da177e4 LT |
415 | |
416 | /* Enable the port */ | |
a2be8786 WVS |
417 | if (pcwd_private.revision == PCWD_REVISION_C) { |
418 | spin_lock(&pcwd_private.io_lock); | |
419 | outb_p(0x00, pcwd_private.io_addr + 3); | |
1da177e4 | 420 | udelay(ISA_COMMAND_TIMEOUT); |
a2be8786 WVS |
421 | stat_reg = inb_p(pcwd_private.io_addr + 2); |
422 | spin_unlock(&pcwd_private.io_lock); | |
8f0235dc | 423 | if (stat_reg & WD_WDIS) { |
1da177e4 LT |
424 | printk(KERN_INFO PFX "Could not start watchdog\n"); |
425 | return -EIO; | |
426 | } | |
427 | } | |
c324ab42 WVS |
428 | |
429 | if (debug >= VERBOSE) | |
430 | printk(KERN_DEBUG PFX "Watchdog started\n"); | |
431 | ||
1da177e4 LT |
432 | return 0; |
433 | } | |
434 | ||
435 | static int pcwd_stop(void) | |
436 | { | |
437 | int stat_reg; | |
438 | ||
439 | /* Stop the timer */ | |
a2be8786 | 440 | del_timer(&pcwd_private.timer); |
1da177e4 LT |
441 | |
442 | /* Disable the board */ | |
a2be8786 WVS |
443 | if (pcwd_private.revision == PCWD_REVISION_C) { |
444 | spin_lock(&pcwd_private.io_lock); | |
445 | outb_p(0xA5, pcwd_private.io_addr + 3); | |
1da177e4 | 446 | udelay(ISA_COMMAND_TIMEOUT); |
a2be8786 | 447 | outb_p(0xA5, pcwd_private.io_addr + 3); |
1da177e4 | 448 | udelay(ISA_COMMAND_TIMEOUT); |
a2be8786 WVS |
449 | stat_reg = inb_p(pcwd_private.io_addr + 2); |
450 | spin_unlock(&pcwd_private.io_lock); | |
8f0235dc | 451 | if ((stat_reg & WD_WDIS) == 0) { |
1da177e4 LT |
452 | printk(KERN_INFO PFX "Could not stop watchdog\n"); |
453 | return -EIO; | |
454 | } | |
455 | } | |
c324ab42 WVS |
456 | |
457 | if (debug >= VERBOSE) | |
458 | printk(KERN_DEBUG PFX "Watchdog stopped\n"); | |
459 | ||
1da177e4 LT |
460 | return 0; |
461 | } | |
462 | ||
463 | static int pcwd_keepalive(void) | |
464 | { | |
465 | /* user land ping */ | |
a2be8786 | 466 | pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ); |
c324ab42 WVS |
467 | |
468 | if (debug >= DEBUG) | |
469 | printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n"); | |
470 | ||
1da177e4 LT |
471 | return 0; |
472 | } | |
473 | ||
474 | static int pcwd_set_heartbeat(int t) | |
475 | { | |
261dcc70 | 476 | if (t < 2 || t > 7200) /* arbitrary upper limit */ |
1da177e4 LT |
477 | return -EINVAL; |
478 | ||
479 | heartbeat = t; | |
c324ab42 WVS |
480 | |
481 | if (debug >= VERBOSE) | |
482 | printk(KERN_DEBUG PFX "New heartbeat: %d\n", | |
483 | heartbeat); | |
484 | ||
1da177e4 LT |
485 | return 0; |
486 | } | |
487 | ||
488 | static int pcwd_get_status(int *status) | |
489 | { | |
4206f0c4 | 490 | int control_status; |
1da177e4 | 491 | |
261dcc70 | 492 | *status = 0; |
a2be8786 WVS |
493 | spin_lock(&pcwd_private.io_lock); |
494 | if (pcwd_private.revision == PCWD_REVISION_A) | |
1da177e4 LT |
495 | /* Rev A cards return status information from |
496 | * the base register, which is used for the | |
497 | * temperature in other cards. */ | |
4206f0c4 | 498 | control_status = inb(pcwd_private.io_addr); |
1da177e4 LT |
499 | else { |
500 | /* Rev C cards return card status in the base | |
501 | * address + 1 register. And use different bits | |
502 | * to indicate a card initiated reset, and an | |
503 | * over-temperature condition. And the reboot | |
504 | * status can be reset. */ | |
4206f0c4 | 505 | control_status = inb(pcwd_private.io_addr + 1); |
1da177e4 | 506 | } |
a2be8786 | 507 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 | 508 | |
a2be8786 | 509 | if (pcwd_private.revision == PCWD_REVISION_A) { |
4206f0c4 | 510 | if (control_status & WD_WDRST) |
1da177e4 LT |
511 | *status |= WDIOF_CARDRESET; |
512 | ||
4206f0c4 | 513 | if (control_status & WD_T110) { |
1da177e4 LT |
514 | *status |= WDIOF_OVERHEAT; |
515 | if (temp_panic) { | |
261dcc70 AC |
516 | printk(KERN_INFO PFX |
517 | "Temperature overheat trip!\n"); | |
68acc05d | 518 | kernel_power_off(); |
1da177e4 LT |
519 | } |
520 | } | |
521 | } else { | |
4206f0c4 | 522 | if (control_status & WD_REVC_WTRP) |
1da177e4 LT |
523 | *status |= WDIOF_CARDRESET; |
524 | ||
4206f0c4 | 525 | if (control_status & WD_REVC_TTRP) { |
1da177e4 LT |
526 | *status |= WDIOF_OVERHEAT; |
527 | if (temp_panic) { | |
261dcc70 AC |
528 | printk(KERN_INFO PFX |
529 | "Temperature overheat trip!\n"); | |
68acc05d | 530 | kernel_power_off(); |
1da177e4 LT |
531 | } |
532 | } | |
533 | } | |
534 | ||
535 | return 0; | |
536 | } | |
537 | ||
538 | static int pcwd_clear_status(void) | |
539 | { | |
4206f0c4 WVS |
540 | int control_status; |
541 | ||
a2be8786 WVS |
542 | if (pcwd_private.revision == PCWD_REVISION_C) { |
543 | spin_lock(&pcwd_private.io_lock); | |
4206f0c4 | 544 | |
c324ab42 | 545 | if (debug >= VERBOSE) |
261dcc70 AC |
546 | printk(KERN_INFO PFX |
547 | "clearing watchdog trip status\n"); | |
c324ab42 | 548 | |
4206f0c4 WVS |
549 | control_status = inb_p(pcwd_private.io_addr + 1); |
550 | ||
c324ab42 | 551 | if (debug >= DEBUG) { |
261dcc70 AC |
552 | printk(KERN_DEBUG PFX "status was: 0x%02x\n", |
553 | control_status); | |
c324ab42 WVS |
554 | printk(KERN_DEBUG PFX "sending: 0x%02x\n", |
555 | (control_status & WD_REVC_R2DS)); | |
556 | } | |
557 | ||
4206f0c4 | 558 | /* clear reset status & Keep Relay 2 disable state as it is */ |
261dcc70 AC |
559 | outb_p((control_status & WD_REVC_R2DS), |
560 | pcwd_private.io_addr + 1); | |
4206f0c4 | 561 | |
a2be8786 | 562 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 LT |
563 | } |
564 | return 0; | |
565 | } | |
566 | ||
567 | static int pcwd_get_temperature(int *temperature) | |
568 | { | |
569 | /* check that port 0 gives temperature info and no command results */ | |
a2be8786 | 570 | if (pcwd_private.command_mode) |
1da177e4 LT |
571 | return -1; |
572 | ||
573 | *temperature = 0; | |
a2be8786 | 574 | if (!pcwd_private.supports_temp) |
1da177e4 LT |
575 | return -ENODEV; |
576 | ||
577 | /* | |
578 | * Convert celsius to fahrenheit, since this was | |
579 | * the decided 'standard' for this return value. | |
580 | */ | |
a2be8786 WVS |
581 | spin_lock(&pcwd_private.io_lock); |
582 | *temperature = ((inb(pcwd_private.io_addr)) * 9 / 5) + 32; | |
583 | spin_unlock(&pcwd_private.io_lock); | |
1da177e4 | 584 | |
c324ab42 WVS |
585 | if (debug >= DEBUG) { |
586 | printk(KERN_DEBUG PFX "temperature is: %d F\n", | |
587 | *temperature); | |
588 | } | |
589 | ||
1da177e4 LT |
590 | return 0; |
591 | } | |
592 | ||
593 | /* | |
594 | * /dev/watchdog handling | |
595 | */ | |
596 | ||
261dcc70 | 597 | static long pcwd_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
598 | { |
599 | int rv; | |
600 | int status; | |
601 | int temperature; | |
602 | int new_heartbeat; | |
603 | int __user *argp = (int __user *)arg; | |
604 | static struct watchdog_info ident = { | |
605 | .options = WDIOF_OVERHEAT | | |
606 | WDIOF_CARDRESET | | |
607 | WDIOF_KEEPALIVEPING | | |
608 | WDIOF_SETTIMEOUT | | |
609 | WDIOF_MAGICCLOSE, | |
610 | .firmware_version = 1, | |
611 | .identity = "PCWD", | |
612 | }; | |
613 | ||
261dcc70 | 614 | switch (cmd) { |
1da177e4 | 615 | case WDIOC_GETSUPPORT: |
261dcc70 | 616 | if (copy_to_user(argp, &ident, sizeof(ident))) |
1da177e4 LT |
617 | return -EFAULT; |
618 | return 0; | |
619 | ||
620 | case WDIOC_GETSTATUS: | |
621 | pcwd_get_status(&status); | |
622 | return put_user(status, argp); | |
623 | ||
624 | case WDIOC_GETBOOTSTATUS: | |
a2be8786 | 625 | return put_user(pcwd_private.boot_status, argp); |
1da177e4 LT |
626 | |
627 | case WDIOC_GETTEMP: | |
628 | if (pcwd_get_temperature(&temperature)) | |
629 | return -EFAULT; | |
630 | ||
631 | return put_user(temperature, argp); | |
632 | ||
633 | case WDIOC_SETOPTIONS: | |
261dcc70 AC |
634 | if (pcwd_private.revision == PCWD_REVISION_C) { |
635 | if (get_user(rv, argp)) | |
1da177e4 LT |
636 | return -EFAULT; |
637 | ||
261dcc70 AC |
638 | if (rv & WDIOS_DISABLECARD) { |
639 | status = pcwd_stop(); | |
640 | if (status < 0) | |
641 | return status; | |
1da177e4 | 642 | } |
261dcc70 AC |
643 | if (rv & WDIOS_ENABLECARD) { |
644 | status = pcwd_start(); | |
645 | if (status < 0) | |
646 | return status; | |
1da177e4 | 647 | } |
1da177e4 | 648 | if (rv & WDIOS_TEMPPANIC) |
1da177e4 | 649 | temp_panic = 1; |
1da177e4 LT |
650 | } |
651 | return -EINVAL; | |
652 | ||
653 | case WDIOC_KEEPALIVE: | |
654 | pcwd_keepalive(); | |
655 | return 0; | |
656 | ||
657 | case WDIOC_SETTIMEOUT: | |
658 | if (get_user(new_heartbeat, argp)) | |
659 | return -EFAULT; | |
660 | ||
661 | if (pcwd_set_heartbeat(new_heartbeat)) | |
662 | return -EINVAL; | |
663 | ||
664 | pcwd_keepalive(); | |
665 | /* Fall */ | |
666 | ||
667 | case WDIOC_GETTIMEOUT: | |
668 | return put_user(heartbeat, argp); | |
0c06090c WVS |
669 | |
670 | default: | |
671 | return -ENOTTY; | |
1da177e4 LT |
672 | } |
673 | ||
674 | return 0; | |
675 | } | |
676 | ||
677 | static ssize_t pcwd_write(struct file *file, const char __user *buf, size_t len, | |
678 | loff_t *ppos) | |
679 | { | |
680 | if (len) { | |
681 | if (!nowayout) { | |
682 | size_t i; | |
683 | ||
684 | /* In case it was set long ago */ | |
685 | expect_close = 0; | |
686 | ||
687 | for (i = 0; i != len; i++) { | |
688 | char c; | |
689 | ||
690 | if (get_user(c, buf + i)) | |
691 | return -EFAULT; | |
692 | if (c == 'V') | |
693 | expect_close = 42; | |
694 | } | |
695 | } | |
696 | pcwd_keepalive(); | |
697 | } | |
698 | return len; | |
699 | } | |
700 | ||
701 | static int pcwd_open(struct inode *inode, struct file *file) | |
702 | { | |
261dcc70 | 703 | if (test_and_set_bit(0, &open_allowed)) |
1da177e4 | 704 | return -EBUSY; |
1da177e4 LT |
705 | if (nowayout) |
706 | __module_get(THIS_MODULE); | |
1da177e4 LT |
707 | /* Activate */ |
708 | pcwd_start(); | |
709 | pcwd_keepalive(); | |
710 | return nonseekable_open(inode, file); | |
711 | } | |
712 | ||
713 | static int pcwd_close(struct inode *inode, struct file *file) | |
714 | { | |
261dcc70 | 715 | if (expect_close == 42) |
1da177e4 | 716 | pcwd_stop(); |
261dcc70 AC |
717 | else { |
718 | printk(KERN_CRIT PFX | |
719 | "Unexpected close, not stopping watchdog!\n"); | |
1da177e4 LT |
720 | pcwd_keepalive(); |
721 | } | |
722 | expect_close = 0; | |
261dcc70 | 723 | clear_bit(0, &open_allowed); |
1da177e4 LT |
724 | return 0; |
725 | } | |
726 | ||
727 | /* | |
728 | * /dev/temperature handling | |
729 | */ | |
730 | ||
731 | static ssize_t pcwd_temp_read(struct file *file, char __user *buf, size_t count, | |
732 | loff_t *ppos) | |
733 | { | |
734 | int temperature; | |
735 | ||
736 | if (pcwd_get_temperature(&temperature)) | |
737 | return -EFAULT; | |
738 | ||
739 | if (copy_to_user(buf, &temperature, 1)) | |
740 | return -EFAULT; | |
741 | ||
742 | return 1; | |
743 | } | |
744 | ||
745 | static int pcwd_temp_open(struct inode *inode, struct file *file) | |
746 | { | |
a2be8786 | 747 | if (!pcwd_private.supports_temp) |
1da177e4 LT |
748 | return -ENODEV; |
749 | ||
750 | return nonseekable_open(inode, file); | |
751 | } | |
752 | ||
753 | static int pcwd_temp_close(struct inode *inode, struct file *file) | |
754 | { | |
755 | return 0; | |
756 | } | |
757 | ||
1da177e4 LT |
758 | /* |
759 | * Kernel Interfaces | |
760 | */ | |
761 | ||
62322d25 | 762 | static const struct file_operations pcwd_fops = { |
1da177e4 LT |
763 | .owner = THIS_MODULE, |
764 | .llseek = no_llseek, | |
765 | .write = pcwd_write, | |
261dcc70 | 766 | .unlocked_ioctl = pcwd_ioctl, |
1da177e4 LT |
767 | .open = pcwd_open, |
768 | .release = pcwd_close, | |
769 | }; | |
770 | ||
771 | static struct miscdevice pcwd_miscdev = { | |
772 | .minor = WATCHDOG_MINOR, | |
773 | .name = "watchdog", | |
774 | .fops = &pcwd_fops, | |
775 | }; | |
776 | ||
62322d25 | 777 | static const struct file_operations pcwd_temp_fops = { |
1da177e4 LT |
778 | .owner = THIS_MODULE, |
779 | .llseek = no_llseek, | |
780 | .read = pcwd_temp_read, | |
781 | .open = pcwd_temp_open, | |
782 | .release = pcwd_temp_close, | |
783 | }; | |
784 | ||
785 | static struct miscdevice temp_miscdev = { | |
786 | .minor = TEMP_MINOR, | |
787 | .name = "temperature", | |
788 | .fops = &pcwd_temp_fops, | |
789 | }; | |
790 | ||
1da177e4 LT |
791 | /* |
792 | * Init & exit routines | |
793 | */ | |
794 | ||
1da177e4 LT |
795 | static inline int get_revision(void) |
796 | { | |
797 | int r = PCWD_REVISION_C; | |
798 | ||
a2be8786 | 799 | spin_lock(&pcwd_private.io_lock); |
1da177e4 LT |
800 | /* REV A cards use only 2 io ports; test |
801 | * presumes a floating bus reads as 0xff. */ | |
a2be8786 WVS |
802 | if ((inb(pcwd_private.io_addr + 2) == 0xFF) || |
803 | (inb(pcwd_private.io_addr + 3) == 0xFF)) | |
261dcc70 | 804 | r = PCWD_REVISION_A; |
a2be8786 | 805 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 LT |
806 | |
807 | return r; | |
808 | } | |
809 | ||
5aa15050 WVS |
810 | /* |
811 | * The ISA cards have a heartbeat bit in one of the registers, which | |
812 | * register is card dependent. The heartbeat bit is monitored, and if | |
813 | * found, is considered proof that a Berkshire card has been found. | |
814 | * The initial rate is once per second at board start up, then twice | |
815 | * per second for normal operation. | |
816 | */ | |
817 | static int __devinit pcwd_isa_match(struct device *dev, unsigned int id) | |
818 | { | |
261dcc70 | 819 | int base_addr = pcwd_ioports[id]; |
5aa15050 WVS |
820 | int port0, last_port0; /* Reg 0, in case it's REV A */ |
821 | int port1, last_port1; /* Register 1 for REV C cards */ | |
822 | int i; | |
823 | int retval; | |
824 | ||
825 | if (debug >= DEBUG) | |
826 | printk(KERN_DEBUG PFX "pcwd_isa_match id=%d\n", | |
827 | id); | |
828 | ||
261dcc70 | 829 | if (!request_region(base_addr, 4, "PCWD")) { |
5aa15050 WVS |
830 | printk(KERN_INFO PFX "Port 0x%04x unavailable\n", base_addr); |
831 | return 0; | |
832 | } | |
833 | ||
834 | retval = 0; | |
835 | ||
836 | port0 = inb_p(base_addr); /* For REV A boards */ | |
837 | port1 = inb_p(base_addr + 1); /* For REV C boards */ | |
838 | if (port0 != 0xff || port1 != 0xff) { | |
839 | /* Not an 'ff' from a floating bus, so must be a card! */ | |
840 | for (i = 0; i < 4; ++i) { | |
841 | ||
842 | msleep(500); | |
843 | ||
844 | last_port0 = port0; | |
845 | last_port1 = port1; | |
846 | ||
847 | port0 = inb_p(base_addr); | |
848 | port1 = inb_p(base_addr + 1); | |
849 | ||
850 | /* Has either hearbeat bit changed? */ | |
851 | if ((port0 ^ last_port0) & WD_HRTBT || | |
852 | (port1 ^ last_port1) & WD_REVC_HRBT) { | |
853 | retval = 1; | |
854 | break; | |
855 | } | |
856 | } | |
857 | } | |
261dcc70 | 858 | release_region(base_addr, 4); |
5aa15050 WVS |
859 | |
860 | return retval; | |
861 | } | |
862 | ||
863 | static int __devinit pcwd_isa_probe(struct device *dev, unsigned int id) | |
1da177e4 LT |
864 | { |
865 | int ret; | |
1da177e4 | 866 | |
5aa15050 WVS |
867 | if (debug >= DEBUG) |
868 | printk(KERN_DEBUG PFX "pcwd_isa_probe id=%d\n", | |
869 | id); | |
870 | ||
1da177e4 LT |
871 | cards_found++; |
872 | if (cards_found == 1) | |
261dcc70 AC |
873 | printk(KERN_INFO PFX "v%s Ken Hollis (kenji@bitgate.com)\n", |
874 | WD_VER); | |
1da177e4 LT |
875 | |
876 | if (cards_found > 1) { | |
877 | printk(KERN_ERR PFX "This driver only supports 1 device\n"); | |
878 | return -ENODEV; | |
879 | } | |
880 | ||
5aa15050 | 881 | if (pcwd_ioports[id] == 0x0000) { |
1da177e4 LT |
882 | printk(KERN_ERR PFX "No I/O-Address for card detected\n"); |
883 | return -ENODEV; | |
884 | } | |
5aa15050 WVS |
885 | pcwd_private.io_addr = pcwd_ioports[id]; |
886 | ||
887 | spin_lock_init(&pcwd_private.io_lock); | |
1da177e4 LT |
888 | |
889 | /* Check card's revision */ | |
a2be8786 | 890 | pcwd_private.revision = get_revision(); |
1da177e4 | 891 | |
261dcc70 AC |
892 | if (!request_region(pcwd_private.io_addr, |
893 | (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4, "PCWD")) { | |
1da177e4 | 894 | printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", |
a2be8786 | 895 | pcwd_private.io_addr); |
261dcc70 | 896 | ret = -EIO; |
5aa15050 | 897 | goto error_request_region; |
1da177e4 LT |
898 | } |
899 | ||
900 | /* Initial variables */ | |
a2be8786 | 901 | pcwd_private.supports_temp = 0; |
1da177e4 | 902 | temp_panic = 0; |
a2be8786 | 903 | pcwd_private.boot_status = 0x0000; |
1da177e4 LT |
904 | |
905 | /* get the boot_status */ | |
a2be8786 | 906 | pcwd_get_status(&pcwd_private.boot_status); |
1da177e4 LT |
907 | |
908 | /* clear the "card caused reboot" flag */ | |
909 | pcwd_clear_status(); | |
910 | ||
82eb7c50 | 911 | setup_timer(&pcwd_private.timer, pcwd_timer_ping, 0); |
1da177e4 LT |
912 | |
913 | /* Disable the board */ | |
914 | pcwd_stop(); | |
915 | ||
916 | /* Check whether or not the card supports the temperature device */ | |
85875211 | 917 | pcwd_check_temperature_support(); |
1da177e4 | 918 | |
af3b38d9 WVS |
919 | /* Show info about the card itself */ |
920 | pcwd_show_card_info(); | |
1da177e4 | 921 | |
f3dc0733 WVS |
922 | /* If heartbeat = 0 then we use the heartbeat from the dip-switches */ |
923 | if (heartbeat == 0) | |
924 | heartbeat = heartbeat_tbl[(pcwd_get_option_switches() & 0x07)]; | |
925 | ||
261dcc70 AC |
926 | /* Check that the heartbeat value is within it's range; |
927 | if not reset to the default */ | |
fd41fa61 WVS |
928 | if (pcwd_set_heartbeat(heartbeat)) { |
929 | pcwd_set_heartbeat(WATCHDOG_HEARTBEAT); | |
261dcc70 AC |
930 | printk(KERN_INFO PFX |
931 | "heartbeat value must be 2 <= heartbeat <= 7200, using %d\n", | |
932 | WATCHDOG_HEARTBEAT); | |
1da177e4 LT |
933 | } |
934 | ||
a2be8786 | 935 | if (pcwd_private.supports_temp) { |
1da177e4 LT |
936 | ret = misc_register(&temp_miscdev); |
937 | if (ret) { | |
261dcc70 AC |
938 | printk(KERN_ERR PFX |
939 | "cannot register miscdev on minor=%d (err=%d)\n", | |
940 | TEMP_MINOR, ret); | |
5aa15050 | 941 | goto error_misc_register_temp; |
1da177e4 LT |
942 | } |
943 | } | |
944 | ||
945 | ret = misc_register(&pcwd_miscdev); | |
946 | if (ret) { | |
261dcc70 AC |
947 | printk(KERN_ERR PFX |
948 | "cannot register miscdev on minor=%d (err=%d)\n", | |
949 | WATCHDOG_MINOR, ret); | |
5aa15050 | 950 | goto error_misc_register_watchdog; |
1da177e4 LT |
951 | } |
952 | ||
953 | printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n", | |
954 | heartbeat, nowayout); | |
955 | ||
956 | return 0; | |
5aa15050 WVS |
957 | |
958 | error_misc_register_watchdog: | |
959 | if (pcwd_private.supports_temp) | |
960 | misc_deregister(&temp_miscdev); | |
961 | error_misc_register_temp: | |
261dcc70 AC |
962 | release_region(pcwd_private.io_addr, |
963 | (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4); | |
5aa15050 WVS |
964 | error_request_region: |
965 | pcwd_private.io_addr = 0x0000; | |
966 | cards_found--; | |
967 | return ret; | |
1da177e4 LT |
968 | } |
969 | ||
5aa15050 | 970 | static int __devexit pcwd_isa_remove(struct device *dev, unsigned int id) |
1da177e4 | 971 | { |
5aa15050 WVS |
972 | if (debug >= DEBUG) |
973 | printk(KERN_DEBUG PFX "pcwd_isa_remove id=%d\n", | |
974 | id); | |
975 | ||
976 | if (!pcwd_private.io_addr) | |
977 | return 1; | |
978 | ||
1da177e4 LT |
979 | /* Disable the board */ |
980 | if (!nowayout) | |
981 | pcwd_stop(); | |
982 | ||
983 | /* Deregister */ | |
984 | misc_deregister(&pcwd_miscdev); | |
a2be8786 | 985 | if (pcwd_private.supports_temp) |
1da177e4 | 986 | misc_deregister(&temp_miscdev); |
261dcc70 AC |
987 | release_region(pcwd_private.io_addr, |
988 | (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4); | |
a2be8786 | 989 | pcwd_private.io_addr = 0x0000; |
f1c3a056 | 990 | cards_found--; |
5aa15050 WVS |
991 | |
992 | return 0; | |
1da177e4 LT |
993 | } |
994 | ||
5aa15050 | 995 | static void pcwd_isa_shutdown(struct device *dev, unsigned int id) |
1da177e4 | 996 | { |
5aa15050 WVS |
997 | if (debug >= DEBUG) |
998 | printk(KERN_DEBUG PFX "pcwd_isa_shutdown id=%d\n", | |
999 | id); | |
1da177e4 | 1000 | |
5aa15050 | 1001 | pcwd_stop(); |
1da177e4 LT |
1002 | } |
1003 | ||
5aa15050 WVS |
1004 | static struct isa_driver pcwd_isa_driver = { |
1005 | .match = pcwd_isa_match, | |
1006 | .probe = pcwd_isa_probe, | |
1007 | .remove = __devexit_p(pcwd_isa_remove), | |
1008 | .shutdown = pcwd_isa_shutdown, | |
1009 | .driver = { | |
1010 | .owner = THIS_MODULE, | |
1011 | .name = WATCHDOG_NAME, | |
1012 | }, | |
1013 | }; | |
1da177e4 LT |
1014 | |
1015 | static int __init pcwd_init_module(void) | |
1016 | { | |
5aa15050 | 1017 | return isa_register_driver(&pcwd_isa_driver, PCWD_ISA_NR_CARDS); |
1da177e4 LT |
1018 | } |
1019 | ||
1020 | static void __exit pcwd_cleanup_module(void) | |
1021 | { | |
5aa15050 | 1022 | isa_unregister_driver(&pcwd_isa_driver); |
369fa252 | 1023 | printk(KERN_INFO PFX "Watchdog Module Unloaded.\n"); |
1da177e4 LT |
1024 | } |
1025 | ||
1026 | module_init(pcwd_init_module); | |
1027 | module_exit(pcwd_cleanup_module); | |
1028 | ||
5aa15050 | 1029 | MODULE_AUTHOR("Ken Hollis <kenji@bitgate.com>, Wim Van Sebroeck <wim@iguana.be>"); |
1da177e4 | 1030 | MODULE_DESCRIPTION("Berkshire ISA-PC Watchdog driver"); |
5aa15050 | 1031 | MODULE_VERSION(WATCHDOG_VERSION); |
1da177e4 LT |
1032 | MODULE_LICENSE("GPL"); |
1033 | MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); | |
1034 | MODULE_ALIAS_MISCDEV(TEMP_MINOR); |