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. | |
143a2e54 WVS |
27 | * 961006 Revised some documentation, fixed some cosmetic bugs. Made |
28 | * drivers to panic the system if it's overheating at bootup. | |
1da177e4 LT |
29 | * 961118 Changed some verbiage on some of the output, tidied up |
30 | * code bits, and added compatibility to 2.1.x. | |
143a2e54 | 31 | * 970912 Enabled board on open and disable on close. |
1da177e4 | 32 | * 971107 Took account of recent VFS changes (broke read). |
143a2e54 WVS |
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>] | |
1da177e4 LT |
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> | |
143a2e54 | 45 | * Added timeout module option to override default |
1da177e4 LT |
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 ": " | |
143a2e54 | 79 | #define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION "\n" |
1da177e4 LT |
80 | |
81 | /* | |
82 | * It should be noted that PCWD_REVISION_B was removed because A and B | |
83 | * are essentially the same types of card, with the exception that B | |
84 | * has temperature reporting. Since I didn't receive a Rev.B card, | |
85 | * the Rev.B card is not supported. (It's a good thing too, as they | |
86 | * are no longer in production.) | |
87 | */ | |
88 | #define PCWD_REVISION_A 1 | |
89 | #define PCWD_REVISION_C 2 | |
90 | ||
5aa15050 WVS |
91 | /* |
92 | * These are the auto-probe addresses available. | |
93 | * | |
94 | * Revision A only uses ports 0x270 and 0x370. Revision C introduced 0x350. | |
95 | * Revision A has an address range of 2 addresses, while Revision C has 4. | |
96 | */ | |
97 | #define PCWD_ISA_NR_CARDS 3 | |
98 | static int pcwd_ioports[] = { 0x270, 0x350, 0x370, 0x000 }; | |
99 | ||
1da177e4 | 100 | /* |
8f0235dc WVS |
101 | * These are the defines that describe the control status bits for the |
102 | * PCI-PC Watchdog card. | |
103 | */ | |
104 | /* Port 1 : Control Status #1 for the PC Watchdog card, revision A. */ | |
4206f0c4 WVS |
105 | #define WD_WDRST 0x01 /* Previously reset state */ |
106 | #define WD_T110 0x02 /* Temperature overheat sense */ | |
107 | #define WD_HRTBT 0x04 /* Heartbeat sense */ | |
108 | #define WD_RLY2 0x08 /* External relay triggered */ | |
109 | #define WD_SRLY2 0x80 /* Software external relay triggered */ | |
8f0235dc | 110 | /* Port 1 : Control Status #1 for the PC Watchdog card, revision C. */ |
4206f0c4 WVS |
111 | #define WD_REVC_WTRP 0x01 /* Watchdog Trip status */ |
112 | #define WD_REVC_HRBT 0x02 /* Watchdog Heartbeat */ | |
113 | #define WD_REVC_TTRP 0x04 /* Temperature Trip status */ | |
261dcc70 AC |
114 | #define WD_REVC_RL2A 0x08 /* Relay 2 activated by |
115 | on-board processor */ | |
4206f0c4 WVS |
116 | #define WD_REVC_RL1A 0x10 /* Relay 1 active */ |
117 | #define WD_REVC_R2DS 0x40 /* Relay 2 disable */ | |
118 | #define WD_REVC_RLY2 0x80 /* Relay 2 activated? */ | |
8f0235dc WVS |
119 | /* Port 2 : Control Status #2 */ |
120 | #define WD_WDIS 0x10 /* Watchdog Disabled */ | |
121 | #define WD_ENTP 0x20 /* Watchdog Enable Temperature Trip */ | |
261dcc70 AC |
122 | #define WD_SSEL 0x40 /* Watchdog Switch Select |
123 | (1:SW1 <-> 0:SW2) */ | |
8f0235dc | 124 | #define WD_WCMD 0x80 /* Watchdog Command Mode */ |
1da177e4 LT |
125 | |
126 | /* max. time we give an ISA watchdog card to process a command */ | |
127 | /* 500ms for each 4 bit response (according to spec.) */ | |
128 | #define ISA_COMMAND_TIMEOUT 1000 | |
129 | ||
130 | /* Watchdog's internal commands */ | |
fd41fa61 WVS |
131 | #define CMD_ISA_IDLE 0x00 |
132 | #define CMD_ISA_VERSION_INTEGER 0x01 | |
133 | #define CMD_ISA_VERSION_TENTH 0x02 | |
134 | #define CMD_ISA_VERSION_HUNDRETH 0x03 | |
135 | #define CMD_ISA_VERSION_MINOR 0x04 | |
136 | #define CMD_ISA_SWITCH_SETTINGS 0x05 | |
369fa252 WVS |
137 | #define CMD_ISA_RESET_PC 0x06 |
138 | #define CMD_ISA_ARM_0 0x07 | |
139 | #define CMD_ISA_ARM_30 0x08 | |
140 | #define CMD_ISA_ARM_60 0x09 | |
fd41fa61 WVS |
141 | #define CMD_ISA_DELAY_TIME_2SECS 0x0A |
142 | #define CMD_ISA_DELAY_TIME_4SECS 0x0B | |
143 | #define CMD_ISA_DELAY_TIME_8SECS 0x0C | |
369fa252 | 144 | #define CMD_ISA_RESET_RELAYS 0x0D |
1da177e4 | 145 | |
f3dc0733 | 146 | /* Watchdog's Dip Switch heartbeat values */ |
7944d3a5 | 147 | static const int heartbeat_tbl[] = { |
f3dc0733 WVS |
148 | 20, /* OFF-OFF-OFF = 20 Sec */ |
149 | 40, /* OFF-OFF-ON = 40 Sec */ | |
150 | 60, /* OFF-ON-OFF = 1 Min */ | |
151 | 300, /* OFF-ON-ON = 5 Min */ | |
152 | 600, /* ON-OFF-OFF = 10 Min */ | |
153 | 1800, /* ON-OFF-ON = 30 Min */ | |
154 | 3600, /* ON-ON-OFF = 1 Hour */ | |
155 | 7200, /* ON-ON-ON = 2 hour */ | |
156 | }; | |
157 | ||
1da177e4 LT |
158 | /* |
159 | * We are using an kernel timer to do the pinging of the watchdog | |
160 | * every ~500ms. We try to set the internal heartbeat of the | |
161 | * watchdog to 2 ms. | |
162 | */ | |
163 | ||
164 | #define WDT_INTERVAL (HZ/2+1) | |
165 | ||
166 | /* We can only use 1 card due to the /dev/watchdog restriction */ | |
167 | static int cards_found; | |
168 | ||
169 | /* internal variables */ | |
36cbaa87 | 170 | static unsigned long open_allowed; |
1da177e4 | 171 | static char expect_close; |
1da177e4 | 172 | static int temp_panic; |
261dcc70 AC |
173 | |
174 | /* this is private data for each ISA-PC watchdog card */ | |
175 | static struct { | |
2891b6ad | 176 | char fw_ver_str[6]; /* The cards firmware version */ |
a2be8786 | 177 | int revision; /* The card's revision */ |
261dcc70 AC |
178 | int supports_temp; /* Whether or not the card has |
179 | a temperature device */ | |
180 | int command_mode; /* Whether or not the card is in | |
181 | command mode */ | |
a2be8786 WVS |
182 | int boot_status; /* The card's boot status */ |
183 | int io_addr; /* The cards I/O address */ | |
184 | spinlock_t io_lock; /* the lock for io operations */ | |
185 | struct timer_list timer; /* The timer that pings the watchdog */ | |
186 | unsigned long next_heartbeat; /* the next_heartbeat for the timer */ | |
187 | } pcwd_private; | |
1da177e4 LT |
188 | |
189 | /* module parameters */ | |
c324ab42 WVS |
190 | #define QUIET 0 /* Default */ |
191 | #define VERBOSE 1 /* Verbose */ | |
192 | #define DEBUG 2 /* print fancy stuff too */ | |
193 | static int debug = QUIET; | |
194 | module_param(debug, int, 0); | |
261dcc70 AC |
195 | MODULE_PARM_DESC(debug, |
196 | "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)"); | |
c324ab42 | 197 | |
261dcc70 AC |
198 | /* default heartbeat = delay-time from dip-switches */ |
199 | #define WATCHDOG_HEARTBEAT 0 | |
1da177e4 LT |
200 | static int heartbeat = WATCHDOG_HEARTBEAT; |
201 | module_param(heartbeat, int, 0); | |
143a2e54 WVS |
202 | MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. " |
203 | "(2 <= heartbeat <= 7200 or 0=delay-time from dip-switches, default=" | |
204 | __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); | |
1da177e4 | 205 | |
4bfdf378 | 206 | static int nowayout = WATCHDOG_NOWAYOUT; |
1da177e4 | 207 | module_param(nowayout, int, 0); |
261dcc70 AC |
208 | MODULE_PARM_DESC(nowayout, |
209 | "Watchdog cannot be stopped once started (default=" | |
210 | __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); | |
1da177e4 LT |
211 | |
212 | /* | |
213 | * Internal functions | |
214 | */ | |
215 | ||
216 | static int send_isa_command(int cmd) | |
217 | { | |
218 | int i; | |
219 | int control_status; | |
220 | int port0, last_port0; /* Double read for stabilising */ | |
221 | ||
c324ab42 WVS |
222 | if (debug >= DEBUG) |
223 | printk(KERN_DEBUG PFX "sending following data cmd=0x%02x\n", | |
224 | cmd); | |
225 | ||
1da177e4 | 226 | /* The WCMD bit must be 1 and the command is only 4 bits in size */ |
8f0235dc | 227 | control_status = (cmd & 0x0F) | WD_WCMD; |
a2be8786 | 228 | outb_p(control_status, pcwd_private.io_addr + 2); |
1da177e4 LT |
229 | udelay(ISA_COMMAND_TIMEOUT); |
230 | ||
a2be8786 | 231 | port0 = inb_p(pcwd_private.io_addr); |
1da177e4 LT |
232 | for (i = 0; i < 25; ++i) { |
233 | last_port0 = port0; | |
a2be8786 | 234 | port0 = inb_p(pcwd_private.io_addr); |
1da177e4 LT |
235 | |
236 | if (port0 == last_port0) | |
237 | break; /* Data is stable */ | |
238 | ||
261dcc70 | 239 | udelay(250); |
1da177e4 LT |
240 | } |
241 | ||
c324ab42 | 242 | if (debug >= DEBUG) |
143a2e54 WVS |
243 | printk(KERN_DEBUG PFX "received following data for " |
244 | "cmd=0x%02x: port0=0x%02x last_port0=0x%02x\n", | |
c324ab42 WVS |
245 | cmd, port0, last_port0); |
246 | ||
1da177e4 LT |
247 | return port0; |
248 | } | |
249 | ||
250 | static int set_command_mode(void) | |
251 | { | |
261dcc70 | 252 | int i, found = 0, count = 0; |
1da177e4 LT |
253 | |
254 | /* Set the card into command mode */ | |
a2be8786 | 255 | spin_lock(&pcwd_private.io_lock); |
1da177e4 LT |
256 | while ((!found) && (count < 3)) { |
257 | i = send_isa_command(CMD_ISA_IDLE); | |
258 | ||
259 | if (i == 0x00) | |
260 | found = 1; | |
261 | else if (i == 0xF3) { | |
262 | /* Card does not like what we've done to it */ | |
a2be8786 | 263 | outb_p(0x00, pcwd_private.io_addr + 2); |
1da177e4 | 264 | udelay(1200); /* Spec says wait 1ms */ |
a2be8786 | 265 | outb_p(0x00, pcwd_private.io_addr + 2); |
1da177e4 LT |
266 | udelay(ISA_COMMAND_TIMEOUT); |
267 | } | |
268 | count++; | |
269 | } | |
a2be8786 WVS |
270 | spin_unlock(&pcwd_private.io_lock); |
271 | pcwd_private.command_mode = found; | |
1da177e4 | 272 | |
c324ab42 WVS |
273 | if (debug >= DEBUG) |
274 | printk(KERN_DEBUG PFX "command_mode=%d\n", | |
275 | pcwd_private.command_mode); | |
276 | ||
7944d3a5 | 277 | return found; |
1da177e4 LT |
278 | } |
279 | ||
280 | static void unset_command_mode(void) | |
281 | { | |
282 | /* Set the card into normal mode */ | |
a2be8786 WVS |
283 | spin_lock(&pcwd_private.io_lock); |
284 | outb_p(0x00, pcwd_private.io_addr + 2); | |
1da177e4 | 285 | udelay(ISA_COMMAND_TIMEOUT); |
a2be8786 | 286 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 | 287 | |
a2be8786 | 288 | pcwd_private.command_mode = 0; |
c324ab42 WVS |
289 | |
290 | if (debug >= DEBUG) | |
291 | printk(KERN_DEBUG PFX "command_mode=%d\n", | |
292 | pcwd_private.command_mode); | |
1da177e4 LT |
293 | } |
294 | ||
85875211 WVS |
295 | static inline void pcwd_check_temperature_support(void) |
296 | { | |
297 | if (inb(pcwd_private.io_addr) != 0xF0) | |
298 | pcwd_private.supports_temp = 1; | |
299 | } | |
300 | ||
2891b6ad | 301 | static inline void pcwd_get_firmware(void) |
af3b38d9 WVS |
302 | { |
303 | int one, ten, hund, minor; | |
af3b38d9 | 304 | |
6bbc20bc | 305 | strcpy(pcwd_private.fw_ver_str, "ERROR"); |
af3b38d9 WVS |
306 | |
307 | if (set_command_mode()) { | |
308 | one = send_isa_command(CMD_ISA_VERSION_INTEGER); | |
309 | ten = send_isa_command(CMD_ISA_VERSION_TENTH); | |
310 | hund = send_isa_command(CMD_ISA_VERSION_HUNDRETH); | |
311 | minor = send_isa_command(CMD_ISA_VERSION_MINOR); | |
261dcc70 AC |
312 | sprintf(pcwd_private.fw_ver_str, "%c.%c%c%c", |
313 | one, ten, hund, minor); | |
af3b38d9 | 314 | } |
af3b38d9 | 315 | unset_command_mode(); |
2891b6ad WVS |
316 | |
317 | return; | |
af3b38d9 WVS |
318 | } |
319 | ||
320 | static inline int pcwd_get_option_switches(void) | |
321 | { | |
261dcc70 | 322 | int option_switches = 0; |
af3b38d9 WVS |
323 | |
324 | if (set_command_mode()) { | |
325 | /* Get switch settings */ | |
326 | option_switches = send_isa_command(CMD_ISA_SWITCH_SETTINGS); | |
327 | } | |
328 | ||
329 | unset_command_mode(); | |
7944d3a5 | 330 | return option_switches; |
af3b38d9 WVS |
331 | } |
332 | ||
333 | static void pcwd_show_card_info(void) | |
334 | { | |
af3b38d9 WVS |
335 | int option_switches; |
336 | ||
337 | /* Get some extra info from the hardware (in command/debug/diag mode) */ | |
338 | if (pcwd_private.revision == PCWD_REVISION_A) | |
261dcc70 AC |
339 | printk(KERN_INFO PFX |
340 | "ISA-PC Watchdog (REV.A) detected at port 0x%04x\n", | |
341 | pcwd_private.io_addr); | |
af3b38d9 | 342 | else if (pcwd_private.revision == PCWD_REVISION_C) { |
2891b6ad | 343 | pcwd_get_firmware(); |
143a2e54 WVS |
344 | printk(KERN_INFO PFX "ISA-PC Watchdog (REV.C) detected at port " |
345 | "0x%04x (Firmware version: %s)\n", | |
2891b6ad | 346 | pcwd_private.io_addr, pcwd_private.fw_ver_str); |
af3b38d9 | 347 | option_switches = pcwd_get_option_switches(); |
143a2e54 WVS |
348 | printk(KERN_INFO PFX "Option switches (0x%02x): " |
349 | "Temperature Reset Enable=%s, Power On Delay=%s\n", | |
af3b38d9 WVS |
350 | option_switches, |
351 | ((option_switches & 0x10) ? "ON" : "OFF"), | |
352 | ((option_switches & 0x08) ? "ON" : "OFF")); | |
353 | ||
354 | /* Reprogram internal heartbeat to 2 seconds */ | |
355 | if (set_command_mode()) { | |
356 | send_isa_command(CMD_ISA_DELAY_TIME_2SECS); | |
357 | unset_command_mode(); | |
358 | } | |
359 | } | |
360 | ||
361 | if (pcwd_private.supports_temp) | |
362 | printk(KERN_INFO PFX "Temperature Option Detected\n"); | |
363 | ||
364 | if (pcwd_private.boot_status & WDIOF_CARDRESET) | |
143a2e54 WVS |
365 | printk(KERN_INFO PFX |
366 | "Previous reboot was caused by the card\n"); | |
af3b38d9 WVS |
367 | |
368 | if (pcwd_private.boot_status & WDIOF_OVERHEAT) { | |
261dcc70 AC |
369 | printk(KERN_EMERG PFX |
370 | "Card senses a CPU Overheat. Panicking!\n"); | |
371 | printk(KERN_EMERG PFX | |
372 | "CPU Overheat\n"); | |
af3b38d9 WVS |
373 | } |
374 | ||
375 | if (pcwd_private.boot_status == 0) | |
261dcc70 AC |
376 | printk(KERN_INFO PFX |
377 | "No previous trip detected - Cold boot or reset\n"); | |
af3b38d9 WVS |
378 | } |
379 | ||
1da177e4 LT |
380 | static void pcwd_timer_ping(unsigned long data) |
381 | { | |
382 | int wdrst_stat; | |
383 | ||
384 | /* If we got a heartbeat pulse within the WDT_INTERVAL | |
385 | * we agree to ping the WDT */ | |
261dcc70 | 386 | if (time_before(jiffies, pcwd_private.next_heartbeat)) { |
1da177e4 | 387 | /* Ping the watchdog */ |
a2be8786 WVS |
388 | spin_lock(&pcwd_private.io_lock); |
389 | if (pcwd_private.revision == PCWD_REVISION_A) { | |
261dcc70 AC |
390 | /* Rev A cards are reset by setting the |
391 | WD_WDRST bit in register 1 */ | |
a2be8786 | 392 | wdrst_stat = inb_p(pcwd_private.io_addr); |
1da177e4 LT |
393 | wdrst_stat &= 0x0F; |
394 | wdrst_stat |= WD_WDRST; | |
395 | ||
a2be8786 | 396 | outb_p(wdrst_stat, pcwd_private.io_addr + 1); |
1da177e4 LT |
397 | } else { |
398 | /* Re-trigger watchdog by writing to port 0 */ | |
a2be8786 | 399 | outb_p(0x00, pcwd_private.io_addr); |
1da177e4 LT |
400 | } |
401 | ||
402 | /* Re-set the timer interval */ | |
a2be8786 | 403 | mod_timer(&pcwd_private.timer, jiffies + WDT_INTERVAL); |
1da177e4 | 404 | |
a2be8786 | 405 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 | 406 | } else { |
261dcc70 AC |
407 | printk(KERN_WARNING PFX |
408 | "Heartbeat lost! Will not ping the watchdog\n"); | |
1da177e4 LT |
409 | } |
410 | } | |
411 | ||
412 | static int pcwd_start(void) | |
413 | { | |
414 | int stat_reg; | |
415 | ||
a2be8786 | 416 | pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ); |
1da177e4 LT |
417 | |
418 | /* Start the timer */ | |
a2be8786 | 419 | mod_timer(&pcwd_private.timer, jiffies + WDT_INTERVAL); |
1da177e4 LT |
420 | |
421 | /* Enable the port */ | |
a2be8786 WVS |
422 | if (pcwd_private.revision == PCWD_REVISION_C) { |
423 | spin_lock(&pcwd_private.io_lock); | |
424 | outb_p(0x00, pcwd_private.io_addr + 3); | |
1da177e4 | 425 | udelay(ISA_COMMAND_TIMEOUT); |
a2be8786 WVS |
426 | stat_reg = inb_p(pcwd_private.io_addr + 2); |
427 | spin_unlock(&pcwd_private.io_lock); | |
8f0235dc | 428 | if (stat_reg & WD_WDIS) { |
1da177e4 LT |
429 | printk(KERN_INFO PFX "Could not start watchdog\n"); |
430 | return -EIO; | |
431 | } | |
432 | } | |
c324ab42 WVS |
433 | |
434 | if (debug >= VERBOSE) | |
435 | printk(KERN_DEBUG PFX "Watchdog started\n"); | |
436 | ||
1da177e4 LT |
437 | return 0; |
438 | } | |
439 | ||
440 | static int pcwd_stop(void) | |
441 | { | |
442 | int stat_reg; | |
443 | ||
444 | /* Stop the timer */ | |
a2be8786 | 445 | del_timer(&pcwd_private.timer); |
1da177e4 LT |
446 | |
447 | /* Disable the board */ | |
a2be8786 WVS |
448 | if (pcwd_private.revision == PCWD_REVISION_C) { |
449 | spin_lock(&pcwd_private.io_lock); | |
450 | outb_p(0xA5, pcwd_private.io_addr + 3); | |
1da177e4 | 451 | udelay(ISA_COMMAND_TIMEOUT); |
a2be8786 | 452 | outb_p(0xA5, pcwd_private.io_addr + 3); |
1da177e4 | 453 | udelay(ISA_COMMAND_TIMEOUT); |
a2be8786 WVS |
454 | stat_reg = inb_p(pcwd_private.io_addr + 2); |
455 | spin_unlock(&pcwd_private.io_lock); | |
8f0235dc | 456 | if ((stat_reg & WD_WDIS) == 0) { |
1da177e4 LT |
457 | printk(KERN_INFO PFX "Could not stop watchdog\n"); |
458 | return -EIO; | |
459 | } | |
460 | } | |
c324ab42 WVS |
461 | |
462 | if (debug >= VERBOSE) | |
463 | printk(KERN_DEBUG PFX "Watchdog stopped\n"); | |
464 | ||
1da177e4 LT |
465 | return 0; |
466 | } | |
467 | ||
468 | static int pcwd_keepalive(void) | |
469 | { | |
470 | /* user land ping */ | |
a2be8786 | 471 | pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ); |
c324ab42 WVS |
472 | |
473 | if (debug >= DEBUG) | |
474 | printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n"); | |
475 | ||
1da177e4 LT |
476 | return 0; |
477 | } | |
478 | ||
479 | static int pcwd_set_heartbeat(int t) | |
480 | { | |
261dcc70 | 481 | if (t < 2 || t > 7200) /* arbitrary upper limit */ |
1da177e4 LT |
482 | return -EINVAL; |
483 | ||
484 | heartbeat = t; | |
c324ab42 WVS |
485 | |
486 | if (debug >= VERBOSE) | |
487 | printk(KERN_DEBUG PFX "New heartbeat: %d\n", | |
488 | heartbeat); | |
489 | ||
1da177e4 LT |
490 | return 0; |
491 | } | |
492 | ||
493 | static int pcwd_get_status(int *status) | |
494 | { | |
4206f0c4 | 495 | int control_status; |
1da177e4 | 496 | |
261dcc70 | 497 | *status = 0; |
a2be8786 WVS |
498 | spin_lock(&pcwd_private.io_lock); |
499 | if (pcwd_private.revision == PCWD_REVISION_A) | |
1da177e4 LT |
500 | /* Rev A cards return status information from |
501 | * the base register, which is used for the | |
502 | * temperature in other cards. */ | |
4206f0c4 | 503 | control_status = inb(pcwd_private.io_addr); |
1da177e4 LT |
504 | else { |
505 | /* Rev C cards return card status in the base | |
506 | * address + 1 register. And use different bits | |
507 | * to indicate a card initiated reset, and an | |
508 | * over-temperature condition. And the reboot | |
509 | * status can be reset. */ | |
4206f0c4 | 510 | control_status = inb(pcwd_private.io_addr + 1); |
1da177e4 | 511 | } |
a2be8786 | 512 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 | 513 | |
a2be8786 | 514 | if (pcwd_private.revision == PCWD_REVISION_A) { |
4206f0c4 | 515 | if (control_status & WD_WDRST) |
1da177e4 LT |
516 | *status |= WDIOF_CARDRESET; |
517 | ||
4206f0c4 | 518 | if (control_status & WD_T110) { |
1da177e4 LT |
519 | *status |= WDIOF_OVERHEAT; |
520 | if (temp_panic) { | |
261dcc70 AC |
521 | printk(KERN_INFO PFX |
522 | "Temperature overheat trip!\n"); | |
68acc05d | 523 | kernel_power_off(); |
1da177e4 LT |
524 | } |
525 | } | |
526 | } else { | |
4206f0c4 | 527 | if (control_status & WD_REVC_WTRP) |
1da177e4 LT |
528 | *status |= WDIOF_CARDRESET; |
529 | ||
4206f0c4 | 530 | if (control_status & WD_REVC_TTRP) { |
1da177e4 LT |
531 | *status |= WDIOF_OVERHEAT; |
532 | if (temp_panic) { | |
261dcc70 AC |
533 | printk(KERN_INFO PFX |
534 | "Temperature overheat trip!\n"); | |
68acc05d | 535 | kernel_power_off(); |
1da177e4 LT |
536 | } |
537 | } | |
538 | } | |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
543 | static int pcwd_clear_status(void) | |
544 | { | |
4206f0c4 WVS |
545 | int control_status; |
546 | ||
a2be8786 WVS |
547 | if (pcwd_private.revision == PCWD_REVISION_C) { |
548 | spin_lock(&pcwd_private.io_lock); | |
4206f0c4 | 549 | |
c324ab42 | 550 | if (debug >= VERBOSE) |
261dcc70 AC |
551 | printk(KERN_INFO PFX |
552 | "clearing watchdog trip status\n"); | |
c324ab42 | 553 | |
4206f0c4 WVS |
554 | control_status = inb_p(pcwd_private.io_addr + 1); |
555 | ||
c324ab42 | 556 | if (debug >= DEBUG) { |
261dcc70 AC |
557 | printk(KERN_DEBUG PFX "status was: 0x%02x\n", |
558 | control_status); | |
c324ab42 WVS |
559 | printk(KERN_DEBUG PFX "sending: 0x%02x\n", |
560 | (control_status & WD_REVC_R2DS)); | |
561 | } | |
562 | ||
4206f0c4 | 563 | /* clear reset status & Keep Relay 2 disable state as it is */ |
261dcc70 AC |
564 | outb_p((control_status & WD_REVC_R2DS), |
565 | pcwd_private.io_addr + 1); | |
4206f0c4 | 566 | |
a2be8786 | 567 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 LT |
568 | } |
569 | return 0; | |
570 | } | |
571 | ||
572 | static int pcwd_get_temperature(int *temperature) | |
573 | { | |
574 | /* check that port 0 gives temperature info and no command results */ | |
a2be8786 | 575 | if (pcwd_private.command_mode) |
1da177e4 LT |
576 | return -1; |
577 | ||
578 | *temperature = 0; | |
a2be8786 | 579 | if (!pcwd_private.supports_temp) |
1da177e4 LT |
580 | return -ENODEV; |
581 | ||
582 | /* | |
583 | * Convert celsius to fahrenheit, since this was | |
584 | * the decided 'standard' for this return value. | |
585 | */ | |
a2be8786 WVS |
586 | spin_lock(&pcwd_private.io_lock); |
587 | *temperature = ((inb(pcwd_private.io_addr)) * 9 / 5) + 32; | |
588 | spin_unlock(&pcwd_private.io_lock); | |
1da177e4 | 589 | |
c324ab42 WVS |
590 | if (debug >= DEBUG) { |
591 | printk(KERN_DEBUG PFX "temperature is: %d F\n", | |
592 | *temperature); | |
593 | } | |
594 | ||
1da177e4 LT |
595 | return 0; |
596 | } | |
597 | ||
598 | /* | |
599 | * /dev/watchdog handling | |
600 | */ | |
601 | ||
261dcc70 | 602 | static long pcwd_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
603 | { |
604 | int rv; | |
605 | int status; | |
606 | int temperature; | |
607 | int new_heartbeat; | |
608 | int __user *argp = (int __user *)arg; | |
42747d71 | 609 | static const struct watchdog_info ident = { |
1da177e4 LT |
610 | .options = WDIOF_OVERHEAT | |
611 | WDIOF_CARDRESET | | |
612 | WDIOF_KEEPALIVEPING | | |
613 | WDIOF_SETTIMEOUT | | |
614 | WDIOF_MAGICCLOSE, | |
615 | .firmware_version = 1, | |
616 | .identity = "PCWD", | |
617 | }; | |
618 | ||
261dcc70 | 619 | switch (cmd) { |
1da177e4 | 620 | case WDIOC_GETSUPPORT: |
261dcc70 | 621 | if (copy_to_user(argp, &ident, sizeof(ident))) |
1da177e4 LT |
622 | return -EFAULT; |
623 | return 0; | |
624 | ||
625 | case WDIOC_GETSTATUS: | |
626 | pcwd_get_status(&status); | |
627 | return put_user(status, argp); | |
628 | ||
629 | case WDIOC_GETBOOTSTATUS: | |
a2be8786 | 630 | return put_user(pcwd_private.boot_status, argp); |
1da177e4 LT |
631 | |
632 | case WDIOC_GETTEMP: | |
633 | if (pcwd_get_temperature(&temperature)) | |
634 | return -EFAULT; | |
635 | ||
636 | return put_user(temperature, argp); | |
637 | ||
638 | case WDIOC_SETOPTIONS: | |
261dcc70 AC |
639 | if (pcwd_private.revision == PCWD_REVISION_C) { |
640 | if (get_user(rv, argp)) | |
1da177e4 LT |
641 | return -EFAULT; |
642 | ||
261dcc70 AC |
643 | if (rv & WDIOS_DISABLECARD) { |
644 | status = pcwd_stop(); | |
645 | if (status < 0) | |
646 | return status; | |
1da177e4 | 647 | } |
261dcc70 AC |
648 | if (rv & WDIOS_ENABLECARD) { |
649 | status = pcwd_start(); | |
650 | if (status < 0) | |
651 | return status; | |
1da177e4 | 652 | } |
1da177e4 | 653 | if (rv & WDIOS_TEMPPANIC) |
1da177e4 | 654 | temp_panic = 1; |
1da177e4 LT |
655 | } |
656 | return -EINVAL; | |
657 | ||
658 | case WDIOC_KEEPALIVE: | |
659 | pcwd_keepalive(); | |
660 | return 0; | |
661 | ||
662 | case WDIOC_SETTIMEOUT: | |
663 | if (get_user(new_heartbeat, argp)) | |
664 | return -EFAULT; | |
665 | ||
666 | if (pcwd_set_heartbeat(new_heartbeat)) | |
667 | return -EINVAL; | |
668 | ||
669 | pcwd_keepalive(); | |
670 | /* Fall */ | |
671 | ||
672 | case WDIOC_GETTIMEOUT: | |
673 | return put_user(heartbeat, argp); | |
0c06090c WVS |
674 | |
675 | default: | |
676 | return -ENOTTY; | |
1da177e4 LT |
677 | } |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
682 | static ssize_t pcwd_write(struct file *file, const char __user *buf, size_t len, | |
683 | loff_t *ppos) | |
684 | { | |
685 | if (len) { | |
686 | if (!nowayout) { | |
687 | size_t i; | |
688 | ||
689 | /* In case it was set long ago */ | |
690 | expect_close = 0; | |
691 | ||
692 | for (i = 0; i != len; i++) { | |
693 | char c; | |
694 | ||
695 | if (get_user(c, buf + i)) | |
696 | return -EFAULT; | |
697 | if (c == 'V') | |
698 | expect_close = 42; | |
699 | } | |
700 | } | |
701 | pcwd_keepalive(); | |
702 | } | |
703 | return len; | |
704 | } | |
705 | ||
706 | static int pcwd_open(struct inode *inode, struct file *file) | |
707 | { | |
261dcc70 | 708 | if (test_and_set_bit(0, &open_allowed)) |
1da177e4 | 709 | return -EBUSY; |
1da177e4 LT |
710 | if (nowayout) |
711 | __module_get(THIS_MODULE); | |
1da177e4 LT |
712 | /* Activate */ |
713 | pcwd_start(); | |
714 | pcwd_keepalive(); | |
715 | return nonseekable_open(inode, file); | |
716 | } | |
717 | ||
718 | static int pcwd_close(struct inode *inode, struct file *file) | |
719 | { | |
261dcc70 | 720 | if (expect_close == 42) |
1da177e4 | 721 | pcwd_stop(); |
261dcc70 AC |
722 | else { |
723 | printk(KERN_CRIT PFX | |
724 | "Unexpected close, not stopping watchdog!\n"); | |
1da177e4 LT |
725 | pcwd_keepalive(); |
726 | } | |
727 | expect_close = 0; | |
261dcc70 | 728 | clear_bit(0, &open_allowed); |
1da177e4 LT |
729 | return 0; |
730 | } | |
731 | ||
732 | /* | |
733 | * /dev/temperature handling | |
734 | */ | |
735 | ||
736 | static ssize_t pcwd_temp_read(struct file *file, char __user *buf, size_t count, | |
737 | loff_t *ppos) | |
738 | { | |
739 | int temperature; | |
740 | ||
741 | if (pcwd_get_temperature(&temperature)) | |
742 | return -EFAULT; | |
743 | ||
744 | if (copy_to_user(buf, &temperature, 1)) | |
745 | return -EFAULT; | |
746 | ||
747 | return 1; | |
748 | } | |
749 | ||
750 | static int pcwd_temp_open(struct inode *inode, struct file *file) | |
751 | { | |
a2be8786 | 752 | if (!pcwd_private.supports_temp) |
1da177e4 LT |
753 | return -ENODEV; |
754 | ||
755 | return nonseekable_open(inode, file); | |
756 | } | |
757 | ||
758 | static int pcwd_temp_close(struct inode *inode, struct file *file) | |
759 | { | |
760 | return 0; | |
761 | } | |
762 | ||
1da177e4 LT |
763 | /* |
764 | * Kernel Interfaces | |
765 | */ | |
766 | ||
62322d25 | 767 | static const struct file_operations pcwd_fops = { |
1da177e4 LT |
768 | .owner = THIS_MODULE, |
769 | .llseek = no_llseek, | |
770 | .write = pcwd_write, | |
261dcc70 | 771 | .unlocked_ioctl = pcwd_ioctl, |
1da177e4 LT |
772 | .open = pcwd_open, |
773 | .release = pcwd_close, | |
774 | }; | |
775 | ||
776 | static struct miscdevice pcwd_miscdev = { | |
777 | .minor = WATCHDOG_MINOR, | |
778 | .name = "watchdog", | |
779 | .fops = &pcwd_fops, | |
780 | }; | |
781 | ||
62322d25 | 782 | static const struct file_operations pcwd_temp_fops = { |
1da177e4 LT |
783 | .owner = THIS_MODULE, |
784 | .llseek = no_llseek, | |
785 | .read = pcwd_temp_read, | |
786 | .open = pcwd_temp_open, | |
787 | .release = pcwd_temp_close, | |
788 | }; | |
789 | ||
790 | static struct miscdevice temp_miscdev = { | |
791 | .minor = TEMP_MINOR, | |
792 | .name = "temperature", | |
793 | .fops = &pcwd_temp_fops, | |
794 | }; | |
795 | ||
1da177e4 LT |
796 | /* |
797 | * Init & exit routines | |
798 | */ | |
799 | ||
1da177e4 LT |
800 | static inline int get_revision(void) |
801 | { | |
802 | int r = PCWD_REVISION_C; | |
803 | ||
a2be8786 | 804 | spin_lock(&pcwd_private.io_lock); |
1da177e4 LT |
805 | /* REV A cards use only 2 io ports; test |
806 | * presumes a floating bus reads as 0xff. */ | |
a2be8786 WVS |
807 | if ((inb(pcwd_private.io_addr + 2) == 0xFF) || |
808 | (inb(pcwd_private.io_addr + 3) == 0xFF)) | |
261dcc70 | 809 | r = PCWD_REVISION_A; |
a2be8786 | 810 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 LT |
811 | |
812 | return r; | |
813 | } | |
814 | ||
5aa15050 WVS |
815 | /* |
816 | * The ISA cards have a heartbeat bit in one of the registers, which | |
817 | * register is card dependent. The heartbeat bit is monitored, and if | |
818 | * found, is considered proof that a Berkshire card has been found. | |
819 | * The initial rate is once per second at board start up, then twice | |
820 | * per second for normal operation. | |
821 | */ | |
822 | static int __devinit pcwd_isa_match(struct device *dev, unsigned int id) | |
823 | { | |
261dcc70 | 824 | int base_addr = pcwd_ioports[id]; |
5aa15050 WVS |
825 | int port0, last_port0; /* Reg 0, in case it's REV A */ |
826 | int port1, last_port1; /* Register 1 for REV C cards */ | |
827 | int i; | |
828 | int retval; | |
829 | ||
830 | if (debug >= DEBUG) | |
831 | printk(KERN_DEBUG PFX "pcwd_isa_match id=%d\n", | |
832 | id); | |
833 | ||
261dcc70 | 834 | if (!request_region(base_addr, 4, "PCWD")) { |
5aa15050 WVS |
835 | printk(KERN_INFO PFX "Port 0x%04x unavailable\n", base_addr); |
836 | return 0; | |
837 | } | |
838 | ||
839 | retval = 0; | |
840 | ||
841 | port0 = inb_p(base_addr); /* For REV A boards */ | |
842 | port1 = inb_p(base_addr + 1); /* For REV C boards */ | |
843 | if (port0 != 0xff || port1 != 0xff) { | |
844 | /* Not an 'ff' from a floating bus, so must be a card! */ | |
845 | for (i = 0; i < 4; ++i) { | |
846 | ||
847 | msleep(500); | |
848 | ||
849 | last_port0 = port0; | |
850 | last_port1 = port1; | |
851 | ||
852 | port0 = inb_p(base_addr); | |
853 | port1 = inb_p(base_addr + 1); | |
854 | ||
855 | /* Has either hearbeat bit changed? */ | |
856 | if ((port0 ^ last_port0) & WD_HRTBT || | |
857 | (port1 ^ last_port1) & WD_REVC_HRBT) { | |
858 | retval = 1; | |
859 | break; | |
860 | } | |
861 | } | |
862 | } | |
261dcc70 | 863 | release_region(base_addr, 4); |
5aa15050 WVS |
864 | |
865 | return retval; | |
866 | } | |
867 | ||
868 | static int __devinit pcwd_isa_probe(struct device *dev, unsigned int id) | |
1da177e4 LT |
869 | { |
870 | int ret; | |
1da177e4 | 871 | |
5aa15050 WVS |
872 | if (debug >= DEBUG) |
873 | printk(KERN_DEBUG PFX "pcwd_isa_probe id=%d\n", | |
874 | id); | |
875 | ||
1da177e4 LT |
876 | cards_found++; |
877 | if (cards_found == 1) | |
261dcc70 | 878 | printk(KERN_INFO PFX "v%s Ken Hollis (kenji@bitgate.com)\n", |
143a2e54 | 879 | WATCHDOG_VERSION); |
1da177e4 LT |
880 | |
881 | if (cards_found > 1) { | |
882 | printk(KERN_ERR PFX "This driver only supports 1 device\n"); | |
883 | return -ENODEV; | |
884 | } | |
885 | ||
5aa15050 | 886 | if (pcwd_ioports[id] == 0x0000) { |
1da177e4 LT |
887 | printk(KERN_ERR PFX "No I/O-Address for card detected\n"); |
888 | return -ENODEV; | |
889 | } | |
5aa15050 WVS |
890 | pcwd_private.io_addr = pcwd_ioports[id]; |
891 | ||
892 | spin_lock_init(&pcwd_private.io_lock); | |
1da177e4 LT |
893 | |
894 | /* Check card's revision */ | |
a2be8786 | 895 | pcwd_private.revision = get_revision(); |
1da177e4 | 896 | |
261dcc70 AC |
897 | if (!request_region(pcwd_private.io_addr, |
898 | (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4, "PCWD")) { | |
1da177e4 | 899 | printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", |
a2be8786 | 900 | pcwd_private.io_addr); |
261dcc70 | 901 | ret = -EIO; |
5aa15050 | 902 | goto error_request_region; |
1da177e4 LT |
903 | } |
904 | ||
905 | /* Initial variables */ | |
a2be8786 | 906 | pcwd_private.supports_temp = 0; |
1da177e4 | 907 | temp_panic = 0; |
a2be8786 | 908 | pcwd_private.boot_status = 0x0000; |
1da177e4 LT |
909 | |
910 | /* get the boot_status */ | |
a2be8786 | 911 | pcwd_get_status(&pcwd_private.boot_status); |
1da177e4 LT |
912 | |
913 | /* clear the "card caused reboot" flag */ | |
914 | pcwd_clear_status(); | |
915 | ||
82eb7c50 | 916 | setup_timer(&pcwd_private.timer, pcwd_timer_ping, 0); |
1da177e4 LT |
917 | |
918 | /* Disable the board */ | |
919 | pcwd_stop(); | |
920 | ||
921 | /* Check whether or not the card supports the temperature device */ | |
85875211 | 922 | pcwd_check_temperature_support(); |
1da177e4 | 923 | |
af3b38d9 WVS |
924 | /* Show info about the card itself */ |
925 | pcwd_show_card_info(); | |
1da177e4 | 926 | |
f3dc0733 WVS |
927 | /* If heartbeat = 0 then we use the heartbeat from the dip-switches */ |
928 | if (heartbeat == 0) | |
929 | heartbeat = heartbeat_tbl[(pcwd_get_option_switches() & 0x07)]; | |
930 | ||
261dcc70 AC |
931 | /* Check that the heartbeat value is within it's range; |
932 | if not reset to the default */ | |
fd41fa61 WVS |
933 | if (pcwd_set_heartbeat(heartbeat)) { |
934 | pcwd_set_heartbeat(WATCHDOG_HEARTBEAT); | |
261dcc70 AC |
935 | printk(KERN_INFO PFX |
936 | "heartbeat value must be 2 <= heartbeat <= 7200, using %d\n", | |
937 | WATCHDOG_HEARTBEAT); | |
1da177e4 LT |
938 | } |
939 | ||
a2be8786 | 940 | if (pcwd_private.supports_temp) { |
1da177e4 LT |
941 | ret = misc_register(&temp_miscdev); |
942 | if (ret) { | |
261dcc70 AC |
943 | printk(KERN_ERR PFX |
944 | "cannot register miscdev on minor=%d (err=%d)\n", | |
945 | TEMP_MINOR, ret); | |
5aa15050 | 946 | goto error_misc_register_temp; |
1da177e4 LT |
947 | } |
948 | } | |
949 | ||
950 | ret = misc_register(&pcwd_miscdev); | |
951 | if (ret) { | |
261dcc70 AC |
952 | printk(KERN_ERR PFX |
953 | "cannot register miscdev on minor=%d (err=%d)\n", | |
954 | WATCHDOG_MINOR, ret); | |
5aa15050 | 955 | goto error_misc_register_watchdog; |
1da177e4 LT |
956 | } |
957 | ||
958 | printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n", | |
959 | heartbeat, nowayout); | |
960 | ||
961 | return 0; | |
5aa15050 WVS |
962 | |
963 | error_misc_register_watchdog: | |
964 | if (pcwd_private.supports_temp) | |
965 | misc_deregister(&temp_miscdev); | |
966 | error_misc_register_temp: | |
261dcc70 AC |
967 | release_region(pcwd_private.io_addr, |
968 | (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4); | |
5aa15050 WVS |
969 | error_request_region: |
970 | pcwd_private.io_addr = 0x0000; | |
971 | cards_found--; | |
972 | return ret; | |
1da177e4 LT |
973 | } |
974 | ||
5aa15050 | 975 | static int __devexit pcwd_isa_remove(struct device *dev, unsigned int id) |
1da177e4 | 976 | { |
5aa15050 WVS |
977 | if (debug >= DEBUG) |
978 | printk(KERN_DEBUG PFX "pcwd_isa_remove id=%d\n", | |
979 | id); | |
980 | ||
981 | if (!pcwd_private.io_addr) | |
982 | return 1; | |
983 | ||
1da177e4 LT |
984 | /* Disable the board */ |
985 | if (!nowayout) | |
986 | pcwd_stop(); | |
987 | ||
988 | /* Deregister */ | |
989 | misc_deregister(&pcwd_miscdev); | |
a2be8786 | 990 | if (pcwd_private.supports_temp) |
1da177e4 | 991 | misc_deregister(&temp_miscdev); |
261dcc70 AC |
992 | release_region(pcwd_private.io_addr, |
993 | (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4); | |
a2be8786 | 994 | pcwd_private.io_addr = 0x0000; |
f1c3a056 | 995 | cards_found--; |
5aa15050 WVS |
996 | |
997 | return 0; | |
1da177e4 LT |
998 | } |
999 | ||
5aa15050 | 1000 | static void pcwd_isa_shutdown(struct device *dev, unsigned int id) |
1da177e4 | 1001 | { |
5aa15050 WVS |
1002 | if (debug >= DEBUG) |
1003 | printk(KERN_DEBUG PFX "pcwd_isa_shutdown id=%d\n", | |
1004 | id); | |
1da177e4 | 1005 | |
5aa15050 | 1006 | pcwd_stop(); |
1da177e4 LT |
1007 | } |
1008 | ||
5aa15050 WVS |
1009 | static struct isa_driver pcwd_isa_driver = { |
1010 | .match = pcwd_isa_match, | |
1011 | .probe = pcwd_isa_probe, | |
1012 | .remove = __devexit_p(pcwd_isa_remove), | |
1013 | .shutdown = pcwd_isa_shutdown, | |
1014 | .driver = { | |
1015 | .owner = THIS_MODULE, | |
1016 | .name = WATCHDOG_NAME, | |
1017 | }, | |
1018 | }; | |
1da177e4 LT |
1019 | |
1020 | static int __init pcwd_init_module(void) | |
1021 | { | |
5aa15050 | 1022 | return isa_register_driver(&pcwd_isa_driver, PCWD_ISA_NR_CARDS); |
1da177e4 LT |
1023 | } |
1024 | ||
1025 | static void __exit pcwd_cleanup_module(void) | |
1026 | { | |
5aa15050 | 1027 | isa_unregister_driver(&pcwd_isa_driver); |
369fa252 | 1028 | printk(KERN_INFO PFX "Watchdog Module Unloaded.\n"); |
1da177e4 LT |
1029 | } |
1030 | ||
1031 | module_init(pcwd_init_module); | |
1032 | module_exit(pcwd_cleanup_module); | |
1033 | ||
143a2e54 WVS |
1034 | MODULE_AUTHOR("Ken Hollis <kenji@bitgate.com>, " |
1035 | "Wim Van Sebroeck <wim@iguana.be>"); | |
1da177e4 | 1036 | MODULE_DESCRIPTION("Berkshire ISA-PC Watchdog driver"); |
5aa15050 | 1037 | MODULE_VERSION(WATCHDOG_VERSION); |
1da177e4 LT |
1038 | MODULE_LICENSE("GPL"); |
1039 | MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); | |
1040 | MODULE_ALIAS_MISCDEV(TEMP_MINOR); |