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Commit | Line | Data |
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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> | |
43 | * 011214 Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT <Matt_Domsch@dell.com> | |
44 | * Added timeout module option to override default | |
45 | */ | |
46 | ||
47 | /* | |
48 | * A bells and whistles driver is available from http://www.pcwd.de/ | |
49 | * More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/ | |
50 | */ | |
51 | ||
fd41fa61 WVS |
52 | #include <linux/module.h> /* For module specific items */ |
53 | #include <linux/moduleparam.h> /* For new moduleparam's */ | |
54 | #include <linux/types.h> /* For standard types (like size_t) */ | |
55 | #include <linux/errno.h> /* For the -ENODEV/... values */ | |
56 | #include <linux/kernel.h> /* For printk/panic/... */ | |
57 | #include <linux/delay.h> /* For mdelay function */ | |
58 | #include <linux/timer.h> /* For timer related operations */ | |
59 | #include <linux/jiffies.h> /* For jiffies stuff */ | |
60 | #include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */ | |
61 | #include <linux/watchdog.h> /* For the watchdog specific items */ | |
5aa15050 | 62 | #include <linux/reboot.h> /* For kernel_power_off() */ |
fd41fa61 WVS |
63 | #include <linux/init.h> /* For __init/__exit/... */ |
64 | #include <linux/fs.h> /* For file operations */ | |
5aa15050 | 65 | #include <linux/isa.h> /* For isa devices */ |
fd41fa61 WVS |
66 | #include <linux/ioport.h> /* For io-port access */ |
67 | #include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */ | |
1da177e4 | 68 | |
fd41fa61 WVS |
69 | #include <asm/uaccess.h> /* For copy_to_user/put_user/... */ |
70 | #include <asm/io.h> /* For inb/outb/... */ | |
71 | ||
72 | /* Module and version information */ | |
5aa15050 WVS |
73 | #define WATCHDOG_VERSION "1.20" |
74 | #define WATCHDOG_DATE "18 Feb 2007" | |
a7122f91 WVS |
75 | #define WATCHDOG_DRIVER_NAME "ISA-PC Watchdog" |
76 | #define WATCHDOG_NAME "pcwd" | |
77 | #define PFX WATCHDOG_NAME ": " | |
78 | #define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n" | |
79 | #define WD_VER WATCHDOG_VERSION " (" WATCHDOG_DATE ")" | |
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 */ | |
114 | #define WD_REVC_RL2A 0x08 /* Relay 2 activated by on-board processor */ | |
115 | #define WD_REVC_RL1A 0x10 /* Relay 1 active */ | |
116 | #define WD_REVC_R2DS 0x40 /* Relay 2 disable */ | |
117 | #define WD_REVC_RLY2 0x80 /* Relay 2 activated? */ | |
8f0235dc WVS |
118 | /* Port 2 : Control Status #2 */ |
119 | #define WD_WDIS 0x10 /* Watchdog Disabled */ | |
120 | #define WD_ENTP 0x20 /* Watchdog Enable Temperature Trip */ | |
121 | #define WD_SSEL 0x40 /* Watchdog Switch Select (1:SW1 <-> 0:SW2) */ | |
122 | #define WD_WCMD 0x80 /* Watchdog Command Mode */ | |
1da177e4 LT |
123 | |
124 | /* max. time we give an ISA watchdog card to process a command */ | |
125 | /* 500ms for each 4 bit response (according to spec.) */ | |
126 | #define ISA_COMMAND_TIMEOUT 1000 | |
127 | ||
128 | /* Watchdog's internal commands */ | |
fd41fa61 WVS |
129 | #define CMD_ISA_IDLE 0x00 |
130 | #define CMD_ISA_VERSION_INTEGER 0x01 | |
131 | #define CMD_ISA_VERSION_TENTH 0x02 | |
132 | #define CMD_ISA_VERSION_HUNDRETH 0x03 | |
133 | #define CMD_ISA_VERSION_MINOR 0x04 | |
134 | #define CMD_ISA_SWITCH_SETTINGS 0x05 | |
369fa252 WVS |
135 | #define CMD_ISA_RESET_PC 0x06 |
136 | #define CMD_ISA_ARM_0 0x07 | |
137 | #define CMD_ISA_ARM_30 0x08 | |
138 | #define CMD_ISA_ARM_60 0x09 | |
fd41fa61 WVS |
139 | #define CMD_ISA_DELAY_TIME_2SECS 0x0A |
140 | #define CMD_ISA_DELAY_TIME_4SECS 0x0B | |
141 | #define CMD_ISA_DELAY_TIME_8SECS 0x0C | |
369fa252 | 142 | #define CMD_ISA_RESET_RELAYS 0x0D |
1da177e4 | 143 | |
f3dc0733 WVS |
144 | /* Watchdog's Dip Switch heartbeat values */ |
145 | static const int heartbeat_tbl [] = { | |
146 | 20, /* OFF-OFF-OFF = 20 Sec */ | |
147 | 40, /* OFF-OFF-ON = 40 Sec */ | |
148 | 60, /* OFF-ON-OFF = 1 Min */ | |
149 | 300, /* OFF-ON-ON = 5 Min */ | |
150 | 600, /* ON-OFF-OFF = 10 Min */ | |
151 | 1800, /* ON-OFF-ON = 30 Min */ | |
152 | 3600, /* ON-ON-OFF = 1 Hour */ | |
153 | 7200, /* ON-ON-ON = 2 hour */ | |
154 | }; | |
155 | ||
1da177e4 LT |
156 | /* |
157 | * We are using an kernel timer to do the pinging of the watchdog | |
158 | * every ~500ms. We try to set the internal heartbeat of the | |
159 | * watchdog to 2 ms. | |
160 | */ | |
161 | ||
162 | #define WDT_INTERVAL (HZ/2+1) | |
163 | ||
164 | /* We can only use 1 card due to the /dev/watchdog restriction */ | |
165 | static int cards_found; | |
166 | ||
167 | /* internal variables */ | |
168 | static atomic_t open_allowed = ATOMIC_INIT(1); | |
169 | static char expect_close; | |
1da177e4 | 170 | static int temp_panic; |
a2be8786 | 171 | static struct { /* this is private data for each ISA-PC watchdog card */ |
2891b6ad | 172 | char fw_ver_str[6]; /* The cards firmware version */ |
a2be8786 WVS |
173 | int revision; /* The card's revision */ |
174 | int supports_temp; /* Wether or not the card has a temperature device */ | |
175 | int command_mode; /* Wether or not the card is in command mode */ | |
176 | int boot_status; /* The card's boot status */ | |
177 | int io_addr; /* The cards I/O address */ | |
178 | spinlock_t io_lock; /* the lock for io operations */ | |
179 | struct timer_list timer; /* The timer that pings the watchdog */ | |
180 | unsigned long next_heartbeat; /* the next_heartbeat for the timer */ | |
181 | } pcwd_private; | |
1da177e4 LT |
182 | |
183 | /* module parameters */ | |
c324ab42 WVS |
184 | #define QUIET 0 /* Default */ |
185 | #define VERBOSE 1 /* Verbose */ | |
186 | #define DEBUG 2 /* print fancy stuff too */ | |
187 | static int debug = QUIET; | |
188 | module_param(debug, int, 0); | |
189 | MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)"); | |
190 | ||
f3dc0733 | 191 | #define WATCHDOG_HEARTBEAT 0 /* default heartbeat = delay-time from dip-switches */ |
1da177e4 LT |
192 | static int heartbeat = WATCHDOG_HEARTBEAT; |
193 | module_param(heartbeat, int, 0); | |
f3dc0733 | 194 | MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2<=heartbeat<=7200 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); |
1da177e4 | 195 | |
4bfdf378 | 196 | static int nowayout = WATCHDOG_NOWAYOUT; |
1da177e4 | 197 | module_param(nowayout, int, 0); |
bffda5c8 | 198 | MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); |
1da177e4 LT |
199 | |
200 | /* | |
201 | * Internal functions | |
202 | */ | |
203 | ||
204 | static int send_isa_command(int cmd) | |
205 | { | |
206 | int i; | |
207 | int control_status; | |
208 | int port0, last_port0; /* Double read for stabilising */ | |
209 | ||
c324ab42 WVS |
210 | if (debug >= DEBUG) |
211 | printk(KERN_DEBUG PFX "sending following data cmd=0x%02x\n", | |
212 | cmd); | |
213 | ||
1da177e4 | 214 | /* The WCMD bit must be 1 and the command is only 4 bits in size */ |
8f0235dc | 215 | control_status = (cmd & 0x0F) | WD_WCMD; |
a2be8786 | 216 | outb_p(control_status, pcwd_private.io_addr + 2); |
1da177e4 LT |
217 | udelay(ISA_COMMAND_TIMEOUT); |
218 | ||
a2be8786 | 219 | port0 = inb_p(pcwd_private.io_addr); |
1da177e4 LT |
220 | for (i = 0; i < 25; ++i) { |
221 | last_port0 = port0; | |
a2be8786 | 222 | port0 = inb_p(pcwd_private.io_addr); |
1da177e4 LT |
223 | |
224 | if (port0 == last_port0) | |
225 | break; /* Data is stable */ | |
226 | ||
227 | udelay (250); | |
228 | } | |
229 | ||
c324ab42 WVS |
230 | if (debug >= DEBUG) |
231 | printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: port0=0x%02x last_port0=0x%02x\n", | |
232 | cmd, port0, last_port0); | |
233 | ||
1da177e4 LT |
234 | return port0; |
235 | } | |
236 | ||
237 | static int set_command_mode(void) | |
238 | { | |
239 | int i, found=0, count=0; | |
240 | ||
241 | /* Set the card into command mode */ | |
a2be8786 | 242 | spin_lock(&pcwd_private.io_lock); |
1da177e4 LT |
243 | while ((!found) && (count < 3)) { |
244 | i = send_isa_command(CMD_ISA_IDLE); | |
245 | ||
246 | if (i == 0x00) | |
247 | found = 1; | |
248 | else if (i == 0xF3) { | |
249 | /* Card does not like what we've done to it */ | |
a2be8786 | 250 | outb_p(0x00, pcwd_private.io_addr + 2); |
1da177e4 | 251 | udelay(1200); /* Spec says wait 1ms */ |
a2be8786 | 252 | outb_p(0x00, pcwd_private.io_addr + 2); |
1da177e4 LT |
253 | udelay(ISA_COMMAND_TIMEOUT); |
254 | } | |
255 | count++; | |
256 | } | |
a2be8786 WVS |
257 | spin_unlock(&pcwd_private.io_lock); |
258 | pcwd_private.command_mode = found; | |
1da177e4 | 259 | |
c324ab42 WVS |
260 | if (debug >= DEBUG) |
261 | printk(KERN_DEBUG PFX "command_mode=%d\n", | |
262 | pcwd_private.command_mode); | |
263 | ||
1da177e4 LT |
264 | return(found); |
265 | } | |
266 | ||
267 | static void unset_command_mode(void) | |
268 | { | |
269 | /* Set the card into normal mode */ | |
a2be8786 WVS |
270 | spin_lock(&pcwd_private.io_lock); |
271 | outb_p(0x00, pcwd_private.io_addr + 2); | |
1da177e4 | 272 | udelay(ISA_COMMAND_TIMEOUT); |
a2be8786 | 273 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 | 274 | |
a2be8786 | 275 | pcwd_private.command_mode = 0; |
c324ab42 WVS |
276 | |
277 | if (debug >= DEBUG) | |
278 | printk(KERN_DEBUG PFX "command_mode=%d\n", | |
279 | pcwd_private.command_mode); | |
1da177e4 LT |
280 | } |
281 | ||
85875211 WVS |
282 | static inline void pcwd_check_temperature_support(void) |
283 | { | |
284 | if (inb(pcwd_private.io_addr) != 0xF0) | |
285 | pcwd_private.supports_temp = 1; | |
286 | } | |
287 | ||
2891b6ad | 288 | static inline void pcwd_get_firmware(void) |
af3b38d9 WVS |
289 | { |
290 | int one, ten, hund, minor; | |
af3b38d9 | 291 | |
6bbc20bc | 292 | strcpy(pcwd_private.fw_ver_str, "ERROR"); |
af3b38d9 WVS |
293 | |
294 | if (set_command_mode()) { | |
295 | one = send_isa_command(CMD_ISA_VERSION_INTEGER); | |
296 | ten = send_isa_command(CMD_ISA_VERSION_TENTH); | |
297 | hund = send_isa_command(CMD_ISA_VERSION_HUNDRETH); | |
298 | minor = send_isa_command(CMD_ISA_VERSION_MINOR); | |
2891b6ad | 299 | sprintf(pcwd_private.fw_ver_str, "%c.%c%c%c", one, ten, hund, minor); |
af3b38d9 | 300 | } |
af3b38d9 | 301 | unset_command_mode(); |
2891b6ad WVS |
302 | |
303 | return; | |
af3b38d9 WVS |
304 | } |
305 | ||
306 | static inline int pcwd_get_option_switches(void) | |
307 | { | |
308 | int option_switches=0; | |
309 | ||
310 | if (set_command_mode()) { | |
311 | /* Get switch settings */ | |
312 | option_switches = send_isa_command(CMD_ISA_SWITCH_SETTINGS); | |
313 | } | |
314 | ||
315 | unset_command_mode(); | |
316 | return(option_switches); | |
317 | } | |
318 | ||
319 | static void pcwd_show_card_info(void) | |
320 | { | |
af3b38d9 WVS |
321 | int option_switches; |
322 | ||
323 | /* Get some extra info from the hardware (in command/debug/diag mode) */ | |
324 | if (pcwd_private.revision == PCWD_REVISION_A) | |
325 | printk(KERN_INFO PFX "ISA-PC Watchdog (REV.A) detected at port 0x%04x\n", pcwd_private.io_addr); | |
326 | else if (pcwd_private.revision == PCWD_REVISION_C) { | |
2891b6ad | 327 | pcwd_get_firmware(); |
af3b38d9 | 328 | printk(KERN_INFO PFX "ISA-PC Watchdog (REV.C) detected at port 0x%04x (Firmware version: %s)\n", |
2891b6ad | 329 | pcwd_private.io_addr, pcwd_private.fw_ver_str); |
af3b38d9 WVS |
330 | option_switches = pcwd_get_option_switches(); |
331 | printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n", | |
332 | option_switches, | |
333 | ((option_switches & 0x10) ? "ON" : "OFF"), | |
334 | ((option_switches & 0x08) ? "ON" : "OFF")); | |
335 | ||
336 | /* Reprogram internal heartbeat to 2 seconds */ | |
337 | if (set_command_mode()) { | |
338 | send_isa_command(CMD_ISA_DELAY_TIME_2SECS); | |
339 | unset_command_mode(); | |
340 | } | |
341 | } | |
342 | ||
343 | if (pcwd_private.supports_temp) | |
344 | printk(KERN_INFO PFX "Temperature Option Detected\n"); | |
345 | ||
346 | if (pcwd_private.boot_status & WDIOF_CARDRESET) | |
347 | printk(KERN_INFO PFX "Previous reboot was caused by the card\n"); | |
348 | ||
349 | if (pcwd_private.boot_status & WDIOF_OVERHEAT) { | |
350 | printk(KERN_EMERG PFX "Card senses a CPU Overheat. Panicking!\n"); | |
351 | printk(KERN_EMERG PFX "CPU Overheat\n"); | |
352 | } | |
353 | ||
354 | if (pcwd_private.boot_status == 0) | |
355 | printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n"); | |
356 | } | |
357 | ||
1da177e4 LT |
358 | static void pcwd_timer_ping(unsigned long data) |
359 | { | |
360 | int wdrst_stat; | |
361 | ||
362 | /* If we got a heartbeat pulse within the WDT_INTERVAL | |
363 | * we agree to ping the WDT */ | |
a2be8786 | 364 | if(time_before(jiffies, pcwd_private.next_heartbeat)) { |
1da177e4 | 365 | /* Ping the watchdog */ |
a2be8786 WVS |
366 | spin_lock(&pcwd_private.io_lock); |
367 | if (pcwd_private.revision == PCWD_REVISION_A) { | |
1da177e4 | 368 | /* Rev A cards are reset by setting the WD_WDRST bit in register 1 */ |
a2be8786 | 369 | wdrst_stat = inb_p(pcwd_private.io_addr); |
1da177e4 LT |
370 | wdrst_stat &= 0x0F; |
371 | wdrst_stat |= WD_WDRST; | |
372 | ||
a2be8786 | 373 | outb_p(wdrst_stat, pcwd_private.io_addr + 1); |
1da177e4 LT |
374 | } else { |
375 | /* Re-trigger watchdog by writing to port 0 */ | |
a2be8786 | 376 | outb_p(0x00, pcwd_private.io_addr); |
1da177e4 LT |
377 | } |
378 | ||
379 | /* Re-set the timer interval */ | |
a2be8786 | 380 | mod_timer(&pcwd_private.timer, jiffies + WDT_INTERVAL); |
1da177e4 | 381 | |
a2be8786 | 382 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 LT |
383 | } else { |
384 | printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n"); | |
385 | } | |
386 | } | |
387 | ||
388 | static int pcwd_start(void) | |
389 | { | |
390 | int stat_reg; | |
391 | ||
a2be8786 | 392 | pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ); |
1da177e4 LT |
393 | |
394 | /* Start the timer */ | |
a2be8786 | 395 | mod_timer(&pcwd_private.timer, jiffies + WDT_INTERVAL); |
1da177e4 LT |
396 | |
397 | /* Enable the port */ | |
a2be8786 WVS |
398 | if (pcwd_private.revision == PCWD_REVISION_C) { |
399 | spin_lock(&pcwd_private.io_lock); | |
400 | outb_p(0x00, pcwd_private.io_addr + 3); | |
1da177e4 | 401 | udelay(ISA_COMMAND_TIMEOUT); |
a2be8786 WVS |
402 | stat_reg = inb_p(pcwd_private.io_addr + 2); |
403 | spin_unlock(&pcwd_private.io_lock); | |
8f0235dc | 404 | if (stat_reg & WD_WDIS) { |
1da177e4 LT |
405 | printk(KERN_INFO PFX "Could not start watchdog\n"); |
406 | return -EIO; | |
407 | } | |
408 | } | |
c324ab42 WVS |
409 | |
410 | if (debug >= VERBOSE) | |
411 | printk(KERN_DEBUG PFX "Watchdog started\n"); | |
412 | ||
1da177e4 LT |
413 | return 0; |
414 | } | |
415 | ||
416 | static int pcwd_stop(void) | |
417 | { | |
418 | int stat_reg; | |
419 | ||
420 | /* Stop the timer */ | |
a2be8786 | 421 | del_timer(&pcwd_private.timer); |
1da177e4 LT |
422 | |
423 | /* Disable the board */ | |
a2be8786 WVS |
424 | if (pcwd_private.revision == PCWD_REVISION_C) { |
425 | spin_lock(&pcwd_private.io_lock); | |
426 | outb_p(0xA5, pcwd_private.io_addr + 3); | |
1da177e4 | 427 | udelay(ISA_COMMAND_TIMEOUT); |
a2be8786 | 428 | outb_p(0xA5, pcwd_private.io_addr + 3); |
1da177e4 | 429 | udelay(ISA_COMMAND_TIMEOUT); |
a2be8786 WVS |
430 | stat_reg = inb_p(pcwd_private.io_addr + 2); |
431 | spin_unlock(&pcwd_private.io_lock); | |
8f0235dc | 432 | if ((stat_reg & WD_WDIS) == 0) { |
1da177e4 LT |
433 | printk(KERN_INFO PFX "Could not stop watchdog\n"); |
434 | return -EIO; | |
435 | } | |
436 | } | |
c324ab42 WVS |
437 | |
438 | if (debug >= VERBOSE) | |
439 | printk(KERN_DEBUG PFX "Watchdog stopped\n"); | |
440 | ||
1da177e4 LT |
441 | return 0; |
442 | } | |
443 | ||
444 | static int pcwd_keepalive(void) | |
445 | { | |
446 | /* user land ping */ | |
a2be8786 | 447 | pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ); |
c324ab42 WVS |
448 | |
449 | if (debug >= DEBUG) | |
450 | printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n"); | |
451 | ||
1da177e4 LT |
452 | return 0; |
453 | } | |
454 | ||
455 | static int pcwd_set_heartbeat(int t) | |
456 | { | |
457 | if ((t < 2) || (t > 7200)) /* arbitrary upper limit */ | |
458 | return -EINVAL; | |
459 | ||
460 | heartbeat = t; | |
c324ab42 WVS |
461 | |
462 | if (debug >= VERBOSE) | |
463 | printk(KERN_DEBUG PFX "New heartbeat: %d\n", | |
464 | heartbeat); | |
465 | ||
1da177e4 LT |
466 | return 0; |
467 | } | |
468 | ||
469 | static int pcwd_get_status(int *status) | |
470 | { | |
4206f0c4 | 471 | int control_status; |
1da177e4 LT |
472 | |
473 | *status=0; | |
a2be8786 WVS |
474 | spin_lock(&pcwd_private.io_lock); |
475 | if (pcwd_private.revision == PCWD_REVISION_A) | |
1da177e4 LT |
476 | /* Rev A cards return status information from |
477 | * the base register, which is used for the | |
478 | * temperature in other cards. */ | |
4206f0c4 | 479 | control_status = inb(pcwd_private.io_addr); |
1da177e4 LT |
480 | else { |
481 | /* Rev C cards return card status in the base | |
482 | * address + 1 register. And use different bits | |
483 | * to indicate a card initiated reset, and an | |
484 | * over-temperature condition. And the reboot | |
485 | * status can be reset. */ | |
4206f0c4 | 486 | control_status = inb(pcwd_private.io_addr + 1); |
1da177e4 | 487 | } |
a2be8786 | 488 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 | 489 | |
a2be8786 | 490 | if (pcwd_private.revision == PCWD_REVISION_A) { |
4206f0c4 | 491 | if (control_status & WD_WDRST) |
1da177e4 LT |
492 | *status |= WDIOF_CARDRESET; |
493 | ||
4206f0c4 | 494 | if (control_status & WD_T110) { |
1da177e4 LT |
495 | *status |= WDIOF_OVERHEAT; |
496 | if (temp_panic) { | |
5aa15050 | 497 | printk(KERN_INFO PFX "Temperature overheat trip!\n"); |
68acc05d | 498 | kernel_power_off(); |
369fa252 | 499 | /* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */ |
1da177e4 LT |
500 | } |
501 | } | |
502 | } else { | |
4206f0c4 | 503 | if (control_status & WD_REVC_WTRP) |
1da177e4 LT |
504 | *status |= WDIOF_CARDRESET; |
505 | ||
4206f0c4 | 506 | if (control_status & WD_REVC_TTRP) { |
1da177e4 LT |
507 | *status |= WDIOF_OVERHEAT; |
508 | if (temp_panic) { | |
5aa15050 | 509 | printk(KERN_INFO PFX "Temperature overheat trip!\n"); |
68acc05d | 510 | kernel_power_off(); |
369fa252 | 511 | /* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */ |
1da177e4 LT |
512 | } |
513 | } | |
514 | } | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
519 | static int pcwd_clear_status(void) | |
520 | { | |
4206f0c4 WVS |
521 | int control_status; |
522 | ||
a2be8786 WVS |
523 | if (pcwd_private.revision == PCWD_REVISION_C) { |
524 | spin_lock(&pcwd_private.io_lock); | |
4206f0c4 | 525 | |
c324ab42 WVS |
526 | if (debug >= VERBOSE) |
527 | printk(KERN_INFO PFX "clearing watchdog trip status\n"); | |
528 | ||
4206f0c4 WVS |
529 | control_status = inb_p(pcwd_private.io_addr + 1); |
530 | ||
c324ab42 WVS |
531 | if (debug >= DEBUG) { |
532 | printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status); | |
533 | printk(KERN_DEBUG PFX "sending: 0x%02x\n", | |
534 | (control_status & WD_REVC_R2DS)); | |
535 | } | |
536 | ||
4206f0c4 WVS |
537 | /* clear reset status & Keep Relay 2 disable state as it is */ |
538 | outb_p((control_status & WD_REVC_R2DS), pcwd_private.io_addr + 1); | |
539 | ||
a2be8786 | 540 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 LT |
541 | } |
542 | return 0; | |
543 | } | |
544 | ||
545 | static int pcwd_get_temperature(int *temperature) | |
546 | { | |
547 | /* check that port 0 gives temperature info and no command results */ | |
a2be8786 | 548 | if (pcwd_private.command_mode) |
1da177e4 LT |
549 | return -1; |
550 | ||
551 | *temperature = 0; | |
a2be8786 | 552 | if (!pcwd_private.supports_temp) |
1da177e4 LT |
553 | return -ENODEV; |
554 | ||
555 | /* | |
556 | * Convert celsius to fahrenheit, since this was | |
557 | * the decided 'standard' for this return value. | |
558 | */ | |
a2be8786 WVS |
559 | spin_lock(&pcwd_private.io_lock); |
560 | *temperature = ((inb(pcwd_private.io_addr)) * 9 / 5) + 32; | |
561 | spin_unlock(&pcwd_private.io_lock); | |
1da177e4 | 562 | |
c324ab42 WVS |
563 | if (debug >= DEBUG) { |
564 | printk(KERN_DEBUG PFX "temperature is: %d F\n", | |
565 | *temperature); | |
566 | } | |
567 | ||
1da177e4 LT |
568 | return 0; |
569 | } | |
570 | ||
571 | /* | |
572 | * /dev/watchdog handling | |
573 | */ | |
574 | ||
575 | static int pcwd_ioctl(struct inode *inode, struct file *file, | |
576 | unsigned int cmd, unsigned long arg) | |
577 | { | |
578 | int rv; | |
579 | int status; | |
580 | int temperature; | |
581 | int new_heartbeat; | |
582 | int __user *argp = (int __user *)arg; | |
583 | static struct watchdog_info ident = { | |
584 | .options = WDIOF_OVERHEAT | | |
585 | WDIOF_CARDRESET | | |
586 | WDIOF_KEEPALIVEPING | | |
587 | WDIOF_SETTIMEOUT | | |
588 | WDIOF_MAGICCLOSE, | |
589 | .firmware_version = 1, | |
590 | .identity = "PCWD", | |
591 | }; | |
592 | ||
593 | switch(cmd) { | |
594 | default: | |
795b89d2 | 595 | return -ENOTTY; |
1da177e4 LT |
596 | |
597 | case WDIOC_GETSUPPORT: | |
598 | if(copy_to_user(argp, &ident, sizeof(ident))) | |
599 | return -EFAULT; | |
600 | return 0; | |
601 | ||
602 | case WDIOC_GETSTATUS: | |
603 | pcwd_get_status(&status); | |
604 | return put_user(status, argp); | |
605 | ||
606 | case WDIOC_GETBOOTSTATUS: | |
a2be8786 | 607 | return put_user(pcwd_private.boot_status, argp); |
1da177e4 LT |
608 | |
609 | case WDIOC_GETTEMP: | |
610 | if (pcwd_get_temperature(&temperature)) | |
611 | return -EFAULT; | |
612 | ||
613 | return put_user(temperature, argp); | |
614 | ||
615 | case WDIOC_SETOPTIONS: | |
a2be8786 | 616 | if (pcwd_private.revision == PCWD_REVISION_C) |
1da177e4 LT |
617 | { |
618 | if(copy_from_user(&rv, argp, sizeof(int))) | |
619 | return -EFAULT; | |
620 | ||
621 | if (rv & WDIOS_DISABLECARD) | |
622 | { | |
623 | return pcwd_stop(); | |
624 | } | |
625 | ||
626 | if (rv & WDIOS_ENABLECARD) | |
627 | { | |
628 | return pcwd_start(); | |
629 | } | |
630 | ||
631 | if (rv & WDIOS_TEMPPANIC) | |
632 | { | |
633 | temp_panic = 1; | |
634 | } | |
635 | } | |
636 | return -EINVAL; | |
637 | ||
638 | case WDIOC_KEEPALIVE: | |
639 | pcwd_keepalive(); | |
640 | return 0; | |
641 | ||
642 | case WDIOC_SETTIMEOUT: | |
643 | if (get_user(new_heartbeat, argp)) | |
644 | return -EFAULT; | |
645 | ||
646 | if (pcwd_set_heartbeat(new_heartbeat)) | |
647 | return -EINVAL; | |
648 | ||
649 | pcwd_keepalive(); | |
650 | /* Fall */ | |
651 | ||
652 | case WDIOC_GETTIMEOUT: | |
653 | return put_user(heartbeat, argp); | |
654 | } | |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
659 | static ssize_t pcwd_write(struct file *file, const char __user *buf, size_t len, | |
660 | loff_t *ppos) | |
661 | { | |
662 | if (len) { | |
663 | if (!nowayout) { | |
664 | size_t i; | |
665 | ||
666 | /* In case it was set long ago */ | |
667 | expect_close = 0; | |
668 | ||
669 | for (i = 0; i != len; i++) { | |
670 | char c; | |
671 | ||
672 | if (get_user(c, buf + i)) | |
673 | return -EFAULT; | |
674 | if (c == 'V') | |
675 | expect_close = 42; | |
676 | } | |
677 | } | |
678 | pcwd_keepalive(); | |
679 | } | |
680 | return len; | |
681 | } | |
682 | ||
683 | static int pcwd_open(struct inode *inode, struct file *file) | |
684 | { | |
685 | if (!atomic_dec_and_test(&open_allowed) ) { | |
c324ab42 WVS |
686 | if (debug >= VERBOSE) |
687 | printk(KERN_ERR PFX "Attempt to open already opened device.\n"); | |
1da177e4 LT |
688 | atomic_inc( &open_allowed ); |
689 | return -EBUSY; | |
690 | } | |
691 | ||
692 | if (nowayout) | |
693 | __module_get(THIS_MODULE); | |
694 | ||
695 | /* Activate */ | |
696 | pcwd_start(); | |
697 | pcwd_keepalive(); | |
698 | return nonseekable_open(inode, file); | |
699 | } | |
700 | ||
701 | static int pcwd_close(struct inode *inode, struct file *file) | |
702 | { | |
703 | if (expect_close == 42) { | |
704 | pcwd_stop(); | |
705 | } else { | |
706 | printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n"); | |
707 | pcwd_keepalive(); | |
708 | } | |
709 | expect_close = 0; | |
710 | atomic_inc( &open_allowed ); | |
711 | return 0; | |
712 | } | |
713 | ||
714 | /* | |
715 | * /dev/temperature handling | |
716 | */ | |
717 | ||
718 | static ssize_t pcwd_temp_read(struct file *file, char __user *buf, size_t count, | |
719 | loff_t *ppos) | |
720 | { | |
721 | int temperature; | |
722 | ||
723 | if (pcwd_get_temperature(&temperature)) | |
724 | return -EFAULT; | |
725 | ||
726 | if (copy_to_user(buf, &temperature, 1)) | |
727 | return -EFAULT; | |
728 | ||
729 | return 1; | |
730 | } | |
731 | ||
732 | static int pcwd_temp_open(struct inode *inode, struct file *file) | |
733 | { | |
a2be8786 | 734 | if (!pcwd_private.supports_temp) |
1da177e4 LT |
735 | return -ENODEV; |
736 | ||
737 | return nonseekable_open(inode, file); | |
738 | } | |
739 | ||
740 | static int pcwd_temp_close(struct inode *inode, struct file *file) | |
741 | { | |
742 | return 0; | |
743 | } | |
744 | ||
1da177e4 LT |
745 | /* |
746 | * Kernel Interfaces | |
747 | */ | |
748 | ||
62322d25 | 749 | static const struct file_operations pcwd_fops = { |
1da177e4 LT |
750 | .owner = THIS_MODULE, |
751 | .llseek = no_llseek, | |
752 | .write = pcwd_write, | |
753 | .ioctl = pcwd_ioctl, | |
754 | .open = pcwd_open, | |
755 | .release = pcwd_close, | |
756 | }; | |
757 | ||
758 | static struct miscdevice pcwd_miscdev = { | |
759 | .minor = WATCHDOG_MINOR, | |
760 | .name = "watchdog", | |
761 | .fops = &pcwd_fops, | |
762 | }; | |
763 | ||
62322d25 | 764 | static const struct file_operations pcwd_temp_fops = { |
1da177e4 LT |
765 | .owner = THIS_MODULE, |
766 | .llseek = no_llseek, | |
767 | .read = pcwd_temp_read, | |
768 | .open = pcwd_temp_open, | |
769 | .release = pcwd_temp_close, | |
770 | }; | |
771 | ||
772 | static struct miscdevice temp_miscdev = { | |
773 | .minor = TEMP_MINOR, | |
774 | .name = "temperature", | |
775 | .fops = &pcwd_temp_fops, | |
776 | }; | |
777 | ||
1da177e4 LT |
778 | /* |
779 | * Init & exit routines | |
780 | */ | |
781 | ||
1da177e4 LT |
782 | static inline int get_revision(void) |
783 | { | |
784 | int r = PCWD_REVISION_C; | |
785 | ||
a2be8786 | 786 | spin_lock(&pcwd_private.io_lock); |
1da177e4 LT |
787 | /* REV A cards use only 2 io ports; test |
788 | * presumes a floating bus reads as 0xff. */ | |
a2be8786 WVS |
789 | if ((inb(pcwd_private.io_addr + 2) == 0xFF) || |
790 | (inb(pcwd_private.io_addr + 3) == 0xFF)) | |
1da177e4 | 791 | r=PCWD_REVISION_A; |
a2be8786 | 792 | spin_unlock(&pcwd_private.io_lock); |
1da177e4 LT |
793 | |
794 | return r; | |
795 | } | |
796 | ||
5aa15050 WVS |
797 | /* |
798 | * The ISA cards have a heartbeat bit in one of the registers, which | |
799 | * register is card dependent. The heartbeat bit is monitored, and if | |
800 | * found, is considered proof that a Berkshire card has been found. | |
801 | * The initial rate is once per second at board start up, then twice | |
802 | * per second for normal operation. | |
803 | */ | |
804 | static int __devinit pcwd_isa_match(struct device *dev, unsigned int id) | |
805 | { | |
806 | int base_addr=pcwd_ioports[id]; | |
807 | int port0, last_port0; /* Reg 0, in case it's REV A */ | |
808 | int port1, last_port1; /* Register 1 for REV C cards */ | |
809 | int i; | |
810 | int retval; | |
811 | ||
812 | if (debug >= DEBUG) | |
813 | printk(KERN_DEBUG PFX "pcwd_isa_match id=%d\n", | |
814 | id); | |
815 | ||
816 | if (!request_region (base_addr, 4, "PCWD")) { | |
817 | printk(KERN_INFO PFX "Port 0x%04x unavailable\n", base_addr); | |
818 | return 0; | |
819 | } | |
820 | ||
821 | retval = 0; | |
822 | ||
823 | port0 = inb_p(base_addr); /* For REV A boards */ | |
824 | port1 = inb_p(base_addr + 1); /* For REV C boards */ | |
825 | if (port0 != 0xff || port1 != 0xff) { | |
826 | /* Not an 'ff' from a floating bus, so must be a card! */ | |
827 | for (i = 0; i < 4; ++i) { | |
828 | ||
829 | msleep(500); | |
830 | ||
831 | last_port0 = port0; | |
832 | last_port1 = port1; | |
833 | ||
834 | port0 = inb_p(base_addr); | |
835 | port1 = inb_p(base_addr + 1); | |
836 | ||
837 | /* Has either hearbeat bit changed? */ | |
838 | if ((port0 ^ last_port0) & WD_HRTBT || | |
839 | (port1 ^ last_port1) & WD_REVC_HRBT) { | |
840 | retval = 1; | |
841 | break; | |
842 | } | |
843 | } | |
844 | } | |
845 | release_region (base_addr, 4); | |
846 | ||
847 | return retval; | |
848 | } | |
849 | ||
850 | static int __devinit pcwd_isa_probe(struct device *dev, unsigned int id) | |
1da177e4 LT |
851 | { |
852 | int ret; | |
1da177e4 | 853 | |
5aa15050 WVS |
854 | if (debug >= DEBUG) |
855 | printk(KERN_DEBUG PFX "pcwd_isa_probe id=%d\n", | |
856 | id); | |
857 | ||
1da177e4 LT |
858 | cards_found++; |
859 | if (cards_found == 1) | |
860 | printk(KERN_INFO PFX "v%s Ken Hollis (kenji@bitgate.com)\n", WD_VER); | |
861 | ||
862 | if (cards_found > 1) { | |
863 | printk(KERN_ERR PFX "This driver only supports 1 device\n"); | |
864 | return -ENODEV; | |
865 | } | |
866 | ||
5aa15050 | 867 | if (pcwd_ioports[id] == 0x0000) { |
1da177e4 LT |
868 | printk(KERN_ERR PFX "No I/O-Address for card detected\n"); |
869 | return -ENODEV; | |
870 | } | |
5aa15050 WVS |
871 | pcwd_private.io_addr = pcwd_ioports[id]; |
872 | ||
873 | spin_lock_init(&pcwd_private.io_lock); | |
1da177e4 LT |
874 | |
875 | /* Check card's revision */ | |
a2be8786 | 876 | pcwd_private.revision = get_revision(); |
1da177e4 | 877 | |
a2be8786 | 878 | if (!request_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4, "PCWD")) { |
1da177e4 | 879 | printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", |
a2be8786 | 880 | pcwd_private.io_addr); |
5aa15050 WVS |
881 | ret=-EIO; |
882 | goto error_request_region; | |
1da177e4 LT |
883 | } |
884 | ||
885 | /* Initial variables */ | |
a2be8786 | 886 | pcwd_private.supports_temp = 0; |
1da177e4 | 887 | temp_panic = 0; |
a2be8786 | 888 | pcwd_private.boot_status = 0x0000; |
1da177e4 LT |
889 | |
890 | /* get the boot_status */ | |
a2be8786 | 891 | pcwd_get_status(&pcwd_private.boot_status); |
1da177e4 LT |
892 | |
893 | /* clear the "card caused reboot" flag */ | |
894 | pcwd_clear_status(); | |
895 | ||
82eb7c50 | 896 | setup_timer(&pcwd_private.timer, pcwd_timer_ping, 0); |
1da177e4 LT |
897 | |
898 | /* Disable the board */ | |
899 | pcwd_stop(); | |
900 | ||
901 | /* Check whether or not the card supports the temperature device */ | |
85875211 | 902 | pcwd_check_temperature_support(); |
1da177e4 | 903 | |
af3b38d9 WVS |
904 | /* Show info about the card itself */ |
905 | pcwd_show_card_info(); | |
1da177e4 | 906 | |
f3dc0733 WVS |
907 | /* If heartbeat = 0 then we use the heartbeat from the dip-switches */ |
908 | if (heartbeat == 0) | |
909 | heartbeat = heartbeat_tbl[(pcwd_get_option_switches() & 0x07)]; | |
910 | ||
1da177e4 | 911 | /* Check that the heartbeat value is within it's range ; if not reset to the default */ |
fd41fa61 WVS |
912 | if (pcwd_set_heartbeat(heartbeat)) { |
913 | pcwd_set_heartbeat(WATCHDOG_HEARTBEAT); | |
914 | printk(KERN_INFO PFX "heartbeat value must be 2<=heartbeat<=7200, using %d\n", | |
915 | WATCHDOG_HEARTBEAT); | |
1da177e4 LT |
916 | } |
917 | ||
a2be8786 | 918 | if (pcwd_private.supports_temp) { |
1da177e4 LT |
919 | ret = misc_register(&temp_miscdev); |
920 | if (ret) { | |
921 | printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", | |
922 | TEMP_MINOR, ret); | |
5aa15050 | 923 | goto error_misc_register_temp; |
1da177e4 LT |
924 | } |
925 | } | |
926 | ||
927 | ret = misc_register(&pcwd_miscdev); | |
928 | if (ret) { | |
929 | printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", | |
930 | WATCHDOG_MINOR, ret); | |
5aa15050 | 931 | goto error_misc_register_watchdog; |
1da177e4 LT |
932 | } |
933 | ||
934 | printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n", | |
935 | heartbeat, nowayout); | |
936 | ||
937 | return 0; | |
5aa15050 WVS |
938 | |
939 | error_misc_register_watchdog: | |
940 | if (pcwd_private.supports_temp) | |
941 | misc_deregister(&temp_miscdev); | |
942 | error_misc_register_temp: | |
943 | release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4); | |
944 | error_request_region: | |
945 | pcwd_private.io_addr = 0x0000; | |
946 | cards_found--; | |
947 | return ret; | |
1da177e4 LT |
948 | } |
949 | ||
5aa15050 | 950 | static int __devexit pcwd_isa_remove(struct device *dev, unsigned int id) |
1da177e4 | 951 | { |
5aa15050 WVS |
952 | if (debug >= DEBUG) |
953 | printk(KERN_DEBUG PFX "pcwd_isa_remove id=%d\n", | |
954 | id); | |
955 | ||
956 | if (!pcwd_private.io_addr) | |
957 | return 1; | |
958 | ||
1da177e4 LT |
959 | /* Disable the board */ |
960 | if (!nowayout) | |
961 | pcwd_stop(); | |
962 | ||
963 | /* Deregister */ | |
964 | misc_deregister(&pcwd_miscdev); | |
a2be8786 | 965 | if (pcwd_private.supports_temp) |
1da177e4 | 966 | misc_deregister(&temp_miscdev); |
a2be8786 WVS |
967 | release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4); |
968 | pcwd_private.io_addr = 0x0000; | |
f1c3a056 | 969 | cards_found--; |
5aa15050 WVS |
970 | |
971 | return 0; | |
1da177e4 LT |
972 | } |
973 | ||
5aa15050 | 974 | static void pcwd_isa_shutdown(struct device *dev, unsigned int id) |
1da177e4 | 975 | { |
5aa15050 WVS |
976 | if (debug >= DEBUG) |
977 | printk(KERN_DEBUG PFX "pcwd_isa_shutdown id=%d\n", | |
978 | id); | |
1da177e4 | 979 | |
5aa15050 | 980 | pcwd_stop(); |
1da177e4 LT |
981 | } |
982 | ||
5aa15050 WVS |
983 | static struct isa_driver pcwd_isa_driver = { |
984 | .match = pcwd_isa_match, | |
985 | .probe = pcwd_isa_probe, | |
986 | .remove = __devexit_p(pcwd_isa_remove), | |
987 | .shutdown = pcwd_isa_shutdown, | |
988 | .driver = { | |
989 | .owner = THIS_MODULE, | |
990 | .name = WATCHDOG_NAME, | |
991 | }, | |
992 | }; | |
1da177e4 LT |
993 | |
994 | static int __init pcwd_init_module(void) | |
995 | { | |
5aa15050 | 996 | return isa_register_driver(&pcwd_isa_driver, PCWD_ISA_NR_CARDS); |
1da177e4 LT |
997 | } |
998 | ||
999 | static void __exit pcwd_cleanup_module(void) | |
1000 | { | |
5aa15050 | 1001 | isa_unregister_driver(&pcwd_isa_driver); |
369fa252 | 1002 | printk(KERN_INFO PFX "Watchdog Module Unloaded.\n"); |
1da177e4 LT |
1003 | } |
1004 | ||
1005 | module_init(pcwd_init_module); | |
1006 | module_exit(pcwd_cleanup_module); | |
1007 | ||
5aa15050 | 1008 | MODULE_AUTHOR("Ken Hollis <kenji@bitgate.com>, Wim Van Sebroeck <wim@iguana.be>"); |
1da177e4 | 1009 | MODULE_DESCRIPTION("Berkshire ISA-PC Watchdog driver"); |
5aa15050 | 1010 | MODULE_VERSION(WATCHDOG_VERSION); |
1da177e4 LT |
1011 | MODULE_LICENSE("GPL"); |
1012 | MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); | |
1013 | MODULE_ALIAS_MISCDEV(TEMP_MINOR); |