Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Berkshire PCI-PC Watchdog Card Driver | |
3 | * | |
39e3a055 | 4 | * (c) Copyright 2003-2007 Wim Van Sebroeck <wim@iguana.be>. |
1da177e4 LT |
5 | * |
6 | * Based on source code of the following authors: | |
7 | * Ken Hollis <kenji@bitgate.com>, | |
8 | * Lindsay Harris <lindsay@bluegum.com>, | |
29fa0586 | 9 | * Alan Cox <alan@lxorguk.ukuu.org.uk>, |
1da177e4 LT |
10 | * Matt Domsch <Matt_Domsch@dell.com>, |
11 | * Rob Radez <rob@osinvestor.com> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or | |
14 | * modify it under the terms of the GNU General Public License | |
15 | * as published by the Free Software Foundation; either version | |
16 | * 2 of the License, or (at your option) any later version. | |
17 | * | |
18 | * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor | |
19 | * provide warranty for any of this software. This material is | |
20 | * provided "AS-IS" and at no charge. | |
21 | */ | |
22 | ||
23 | /* | |
58b519f3 | 24 | * A bells and whistles driver is available from: |
b3faed63 WVS |
25 | * http://www.kernel.org/pub/linux/kernel/people/wim/pcwd/pcwd_pci/ |
26 | * | |
1da177e4 LT |
27 | * More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/ |
28 | */ | |
29 | ||
30 | /* | |
31 | * Includes, defines, variables, module parameters, ... | |
32 | */ | |
33 | ||
c315b7e8 WVS |
34 | #include <linux/module.h> /* For module specific items */ |
35 | #include <linux/moduleparam.h> /* For new moduleparam's */ | |
36 | #include <linux/types.h> /* For standard types (like size_t) */ | |
37 | #include <linux/errno.h> /* For the -ENODEV/... values */ | |
38 | #include <linux/kernel.h> /* For printk/panic/... */ | |
39 | #include <linux/delay.h> /* For mdelay function */ | |
40 | #include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */ | |
41 | #include <linux/watchdog.h> /* For the watchdog specific items */ | |
42 | #include <linux/notifier.h> /* For notifier support */ | |
43 | #include <linux/reboot.h> /* For reboot_notifier stuff */ | |
44 | #include <linux/init.h> /* For __init/__exit/... */ | |
45 | #include <linux/fs.h> /* For file operations */ | |
46 | #include <linux/pci.h> /* For pci functions */ | |
47 | #include <linux/ioport.h> /* For io-port access */ | |
48 | #include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */ | |
089ab079 WVS |
49 | #include <linux/uaccess.h> /* For copy_to_user/put_user/... */ |
50 | #include <linux/io.h> /* For inb/outb/... */ | |
1da177e4 LT |
51 | |
52 | /* Module and version information */ | |
39e3a055 | 53 | #define WATCHDOG_VERSION "1.03" |
bffda5c8 | 54 | #define WATCHDOG_DATE "21 Jan 2007" |
1da177e4 LT |
55 | #define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog" |
56 | #define WATCHDOG_NAME "pcwd_pci" | |
57 | #define PFX WATCHDOG_NAME ": " | |
58 | #define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n" | |
59 | ||
60 | /* Stuff for the PCI ID's */ | |
61 | #ifndef PCI_VENDOR_ID_QUICKLOGIC | |
62 | #define PCI_VENDOR_ID_QUICKLOGIC 0x11e3 | |
63 | #endif | |
64 | ||
65 | #ifndef PCI_DEVICE_ID_WATCHDOG_PCIPCWD | |
66 | #define PCI_DEVICE_ID_WATCHDOG_PCIPCWD 0x5030 | |
67 | #endif | |
68 | ||
69 | /* | |
70 | * These are the defines that describe the control status bits for the | |
71 | * PCI-PC Watchdog card. | |
72 | */ | |
a0800f6d WVS |
73 | /* Port 1 : Control Status #1 */ |
74 | #define WD_PCI_WTRP 0x01 /* Watchdog Trip status */ | |
75 | #define WD_PCI_HRBT 0x02 /* Watchdog Heartbeat */ | |
76 | #define WD_PCI_TTRP 0x04 /* Temperature Trip status */ | |
77 | #define WD_PCI_RL2A 0x08 /* Relay 2 Active */ | |
78 | #define WD_PCI_RL1A 0x10 /* Relay 1 Active */ | |
79 | #define WD_PCI_R2DS 0x40 /* Relay 2 Disable Temperature-trip/reset */ | |
80 | #define WD_PCI_RLY2 0x80 /* Activate Relay 2 on the board */ | |
81 | /* Port 2 : Control Status #2 */ | |
82 | #define WD_PCI_WDIS 0x10 /* Watchdog Disable */ | |
83 | #define WD_PCI_ENTP 0x20 /* Enable Temperature Trip Reset */ | |
84 | #define WD_PCI_WRSP 0x40 /* Watchdog wrote response */ | |
85 | #define WD_PCI_PCMD 0x80 /* PC has sent command */ | |
1da177e4 LT |
86 | |
87 | /* according to documentation max. time to process a command for the pci | |
88 | * watchdog card is 100 ms, so we give it 150 ms to do it's job */ | |
89 | #define PCI_COMMAND_TIMEOUT 150 | |
90 | ||
91 | /* Watchdog's internal commands */ | |
a0800f6d WVS |
92 | #define CMD_GET_STATUS 0x04 |
93 | #define CMD_GET_FIRMWARE_VERSION 0x08 | |
94 | #define CMD_READ_WATCHDOG_TIMEOUT 0x18 | |
95 | #define CMD_WRITE_WATCHDOG_TIMEOUT 0x19 | |
96 | #define CMD_GET_CLEAR_RESET_COUNT 0x84 | |
1da177e4 | 97 | |
39e3a055 | 98 | /* Watchdog's Dip Switch heartbeat values */ |
7944d3a5 | 99 | static const int heartbeat_tbl[] = { |
39e3a055 WVS |
100 | 5, /* OFF-OFF-OFF = 5 Sec */ |
101 | 10, /* OFF-OFF-ON = 10 Sec */ | |
102 | 30, /* OFF-ON-OFF = 30 Sec */ | |
103 | 60, /* OFF-ON-ON = 1 Min */ | |
104 | 300, /* ON-OFF-OFF = 5 Min */ | |
105 | 600, /* ON-OFF-ON = 10 Min */ | |
106 | 1800, /* ON-ON-OFF = 30 Min */ | |
107 | 3600, /* ON-ON-ON = 1 hour */ | |
108 | }; | |
109 | ||
1da177e4 LT |
110 | /* We can only use 1 card due to the /dev/watchdog restriction */ |
111 | static int cards_found; | |
112 | ||
113 | /* internal variables */ | |
114 | static int temp_panic; | |
115 | static unsigned long is_active; | |
116 | static char expect_release; | |
a0800f6d WVS |
117 | static struct { /* this is private data for each PCI-PC watchdog card */ |
118 | int supports_temp; /* Wether or not the card has a temperature device */ | |
119 | int boot_status; /* The card's boot status */ | |
120 | unsigned long io_addr; /* The cards I/O address */ | |
121 | spinlock_t io_lock; /* the lock for io operations */ | |
122 | struct pci_dev *pdev; /* the PCI-device */ | |
1da177e4 LT |
123 | } pcipcwd_private; |
124 | ||
125 | /* module parameters */ | |
195331d7 WVS |
126 | #define QUIET 0 /* Default */ |
127 | #define VERBOSE 1 /* Verbose */ | |
128 | #define DEBUG 2 /* print fancy stuff too */ | |
129 | static int debug = QUIET; | |
130 | module_param(debug, int, 0); | |
131 | MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)"); | |
132 | ||
39e3a055 | 133 | #define WATCHDOG_HEARTBEAT 0 /* default heartbeat = delay-time from dip-switches */ |
1da177e4 LT |
134 | static int heartbeat = WATCHDOG_HEARTBEAT; |
135 | module_param(heartbeat, int, 0); | |
39e3a055 | 136 | MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); |
1da177e4 | 137 | |
4bfdf378 | 138 | static int nowayout = WATCHDOG_NOWAYOUT; |
1da177e4 | 139 | module_param(nowayout, int, 0); |
bffda5c8 | 140 | MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); |
1da177e4 LT |
141 | |
142 | /* | |
143 | * Internal functions | |
144 | */ | |
145 | ||
146 | static int send_command(int cmd, int *msb, int *lsb) | |
147 | { | |
148 | int got_response, count; | |
149 | ||
195331d7 WVS |
150 | if (debug >= DEBUG) |
151 | printk(KERN_DEBUG PFX "sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n", | |
152 | cmd, *msb, *lsb); | |
153 | ||
1da177e4 LT |
154 | spin_lock(&pcipcwd_private.io_lock); |
155 | /* If a command requires data it should be written first. | |
156 | * Data for commands with 8 bits of data should be written to port 4. | |
157 | * Commands with 16 bits of data, should be written as LSB to port 4 | |
158 | * and MSB to port 5. | |
159 | * After the required data has been written then write the command to | |
160 | * port 6. */ | |
161 | outb_p(*lsb, pcipcwd_private.io_addr + 4); | |
162 | outb_p(*msb, pcipcwd_private.io_addr + 5); | |
163 | outb_p(cmd, pcipcwd_private.io_addr + 6); | |
164 | ||
165 | /* wait till the pci card processed the command, signaled by | |
166 | * the WRSP bit in port 2 and give it a max. timeout of | |
167 | * PCI_COMMAND_TIMEOUT to process */ | |
a0800f6d | 168 | got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP; |
1da177e4 LT |
169 | for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); count++) { |
170 | mdelay(1); | |
a0800f6d | 171 | got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP; |
1da177e4 LT |
172 | } |
173 | ||
195331d7 WVS |
174 | if (debug >= DEBUG) { |
175 | if (got_response) { | |
176 | printk(KERN_DEBUG PFX "time to process command was: %d ms\n", | |
177 | count); | |
178 | } else { | |
179 | printk(KERN_DEBUG PFX "card did not respond on command!\n"); | |
180 | } | |
181 | } | |
182 | ||
1da177e4 LT |
183 | if (got_response) { |
184 | /* read back response */ | |
185 | *lsb = inb_p(pcipcwd_private.io_addr + 4); | |
186 | *msb = inb_p(pcipcwd_private.io_addr + 5); | |
187 | ||
188 | /* clear WRSP bit */ | |
189 | inb_p(pcipcwd_private.io_addr + 6); | |
195331d7 WVS |
190 | |
191 | if (debug >= DEBUG) | |
192 | printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n", | |
193 | cmd, *msb, *lsb); | |
1da177e4 | 194 | } |
195331d7 | 195 | |
1da177e4 LT |
196 | spin_unlock(&pcipcwd_private.io_lock); |
197 | ||
198 | return got_response; | |
199 | } | |
200 | ||
a0800f6d WVS |
201 | static inline void pcipcwd_check_temperature_support(void) |
202 | { | |
203 | if (inb_p(pcipcwd_private.io_addr) != 0xF0) | |
204 | pcipcwd_private.supports_temp = 1; | |
205 | } | |
206 | ||
207 | static int pcipcwd_get_option_switches(void) | |
208 | { | |
209 | int option_switches; | |
210 | ||
211 | option_switches = inb_p(pcipcwd_private.io_addr + 3); | |
212 | return option_switches; | |
213 | } | |
214 | ||
215 | static void pcipcwd_show_card_info(void) | |
216 | { | |
217 | int got_fw_rev, fw_rev_major, fw_rev_minor; | |
218 | char fw_ver_str[20]; /* The cards firmware version */ | |
219 | int option_switches; | |
220 | ||
221 | got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor); | |
7944d3a5 | 222 | if (got_fw_rev) |
a0800f6d | 223 | sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor); |
7944d3a5 | 224 | else |
a0800f6d | 225 | sprintf(fw_ver_str, "<card no answer>"); |
a0800f6d WVS |
226 | |
227 | /* Get switch settings */ | |
228 | option_switches = pcipcwd_get_option_switches(); | |
229 | ||
230 | printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n", | |
231 | (int) pcipcwd_private.io_addr, fw_ver_str, | |
232 | (pcipcwd_private.supports_temp ? "with" : "without")); | |
233 | ||
234 | printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n", | |
235 | option_switches, | |
236 | ((option_switches & 0x10) ? "ON" : "OFF"), | |
237 | ((option_switches & 0x08) ? "ON" : "OFF")); | |
238 | ||
239 | if (pcipcwd_private.boot_status & WDIOF_CARDRESET) | |
240 | printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n"); | |
241 | ||
242 | if (pcipcwd_private.boot_status & WDIOF_OVERHEAT) | |
243 | printk(KERN_INFO PFX "Card sensed a CPU Overheat\n"); | |
244 | ||
245 | if (pcipcwd_private.boot_status == 0) | |
246 | printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n"); | |
247 | } | |
248 | ||
1da177e4 LT |
249 | static int pcipcwd_start(void) |
250 | { | |
251 | int stat_reg; | |
252 | ||
253 | spin_lock(&pcipcwd_private.io_lock); | |
254 | outb_p(0x00, pcipcwd_private.io_addr + 3); | |
255 | udelay(1000); | |
256 | ||
257 | stat_reg = inb_p(pcipcwd_private.io_addr + 2); | |
258 | spin_unlock(&pcipcwd_private.io_lock); | |
259 | ||
a0800f6d | 260 | if (stat_reg & WD_PCI_WDIS) { |
1da177e4 LT |
261 | printk(KERN_ERR PFX "Card timer not enabled\n"); |
262 | return -1; | |
263 | } | |
264 | ||
195331d7 WVS |
265 | if (debug >= VERBOSE) |
266 | printk(KERN_DEBUG PFX "Watchdog started\n"); | |
267 | ||
1da177e4 LT |
268 | return 0; |
269 | } | |
270 | ||
271 | static int pcipcwd_stop(void) | |
272 | { | |
273 | int stat_reg; | |
274 | ||
275 | spin_lock(&pcipcwd_private.io_lock); | |
276 | outb_p(0xA5, pcipcwd_private.io_addr + 3); | |
277 | udelay(1000); | |
278 | ||
279 | outb_p(0xA5, pcipcwd_private.io_addr + 3); | |
280 | udelay(1000); | |
281 | ||
282 | stat_reg = inb_p(pcipcwd_private.io_addr + 2); | |
283 | spin_unlock(&pcipcwd_private.io_lock); | |
284 | ||
a0800f6d | 285 | if (!(stat_reg & WD_PCI_WDIS)) { |
1da177e4 LT |
286 | printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n"); |
287 | return -1; | |
288 | } | |
289 | ||
195331d7 WVS |
290 | if (debug >= VERBOSE) |
291 | printk(KERN_DEBUG PFX "Watchdog stopped\n"); | |
292 | ||
1da177e4 LT |
293 | return 0; |
294 | } | |
295 | ||
296 | static int pcipcwd_keepalive(void) | |
297 | { | |
298 | /* Re-trigger watchdog by writing to port 0 */ | |
045798b5 | 299 | spin_lock(&pcipcwd_private.io_lock); |
a0800f6d | 300 | outb_p(0x42, pcipcwd_private.io_addr); /* send out any data */ |
045798b5 | 301 | spin_unlock(&pcipcwd_private.io_lock); |
195331d7 WVS |
302 | |
303 | if (debug >= DEBUG) | |
304 | printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n"); | |
305 | ||
1da177e4 LT |
306 | return 0; |
307 | } | |
308 | ||
309 | static int pcipcwd_set_heartbeat(int t) | |
310 | { | |
311 | int t_msb = t / 256; | |
312 | int t_lsb = t % 256; | |
313 | ||
314 | if ((t < 0x0001) || (t > 0xFFFF)) | |
315 | return -EINVAL; | |
316 | ||
317 | /* Write new heartbeat to watchdog */ | |
318 | send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb); | |
319 | ||
320 | heartbeat = t; | |
195331d7 WVS |
321 | if (debug >= VERBOSE) |
322 | printk(KERN_DEBUG PFX "New heartbeat: %d\n", | |
323 | heartbeat); | |
324 | ||
1da177e4 LT |
325 | return 0; |
326 | } | |
327 | ||
328 | static int pcipcwd_get_status(int *status) | |
329 | { | |
a0800f6d | 330 | int control_status; |
1da177e4 | 331 | |
7944d3a5 | 332 | *status = 0; |
a0800f6d WVS |
333 | control_status = inb_p(pcipcwd_private.io_addr + 1); |
334 | if (control_status & WD_PCI_WTRP) | |
1da177e4 | 335 | *status |= WDIOF_CARDRESET; |
a0800f6d | 336 | if (control_status & WD_PCI_TTRP) { |
1da177e4 LT |
337 | *status |= WDIOF_OVERHEAT; |
338 | if (temp_panic) | |
339 | panic(PFX "Temperature overheat trip!\n"); | |
340 | } | |
341 | ||
195331d7 WVS |
342 | if (debug >= DEBUG) |
343 | printk(KERN_DEBUG PFX "Control Status #1: 0x%02x\n", | |
344 | control_status); | |
345 | ||
1da177e4 LT |
346 | return 0; |
347 | } | |
348 | ||
349 | static int pcipcwd_clear_status(void) | |
350 | { | |
a0800f6d WVS |
351 | int control_status; |
352 | int msb; | |
353 | int reset_counter; | |
354 | ||
195331d7 WVS |
355 | if (debug >= VERBOSE) |
356 | printk(KERN_INFO PFX "clearing watchdog trip status & LED\n"); | |
357 | ||
a0800f6d WVS |
358 | control_status = inb_p(pcipcwd_private.io_addr + 1); |
359 | ||
195331d7 WVS |
360 | if (debug >= DEBUG) { |
361 | printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status); | |
362 | printk(KERN_DEBUG PFX "sending: 0x%02x\n", | |
363 | (control_status & WD_PCI_R2DS) | WD_PCI_WTRP); | |
364 | } | |
365 | ||
a0800f6d WVS |
366 | /* clear trip status & LED and keep mode of relay 2 */ |
367 | outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, pcipcwd_private.io_addr + 1); | |
368 | ||
369 | /* clear reset counter */ | |
7944d3a5 WVS |
370 | msb = 0; |
371 | reset_counter = 0xff; | |
a0800f6d WVS |
372 | send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter); |
373 | ||
195331d7 WVS |
374 | if (debug >= DEBUG) { |
375 | printk(KERN_DEBUG PFX "reset count was: 0x%02x\n", | |
376 | reset_counter); | |
377 | } | |
378 | ||
1da177e4 LT |
379 | return 0; |
380 | } | |
381 | ||
382 | static int pcipcwd_get_temperature(int *temperature) | |
383 | { | |
384 | *temperature = 0; | |
385 | if (!pcipcwd_private.supports_temp) | |
386 | return -ENODEV; | |
387 | ||
045798b5 | 388 | spin_lock(&pcipcwd_private.io_lock); |
a0800f6d | 389 | *temperature = inb_p(pcipcwd_private.io_addr); |
045798b5 | 390 | spin_unlock(&pcipcwd_private.io_lock); |
a0800f6d | 391 | |
1da177e4 LT |
392 | /* |
393 | * Convert celsius to fahrenheit, since this was | |
394 | * the decided 'standard' for this return value. | |
395 | */ | |
a0800f6d | 396 | *temperature = (*temperature * 9 / 5) + 32; |
1da177e4 | 397 | |
195331d7 WVS |
398 | if (debug >= DEBUG) { |
399 | printk(KERN_DEBUG PFX "temperature is: %d F\n", | |
400 | *temperature); | |
401 | } | |
402 | ||
1da177e4 LT |
403 | return 0; |
404 | } | |
405 | ||
58b519f3 WVS |
406 | static int pcipcwd_get_timeleft(int *time_left) |
407 | { | |
408 | int msb; | |
409 | int lsb; | |
410 | ||
411 | /* Read the time that's left before rebooting */ | |
412 | /* Note: if the board is not yet armed then we will read 0xFFFF */ | |
413 | send_command(CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb); | |
414 | ||
415 | *time_left = (msb << 8) + lsb; | |
416 | ||
417 | if (debug >= VERBOSE) | |
418 | printk(KERN_DEBUG PFX "Time left before next reboot: %d\n", | |
419 | *time_left); | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
1da177e4 LT |
424 | /* |
425 | * /dev/watchdog handling | |
426 | */ | |
427 | ||
428 | static ssize_t pcipcwd_write(struct file *file, const char __user *data, | |
a0800f6d | 429 | size_t len, loff_t *ppos) |
1da177e4 LT |
430 | { |
431 | /* See if we got the magic character 'V' and reload the timer */ | |
432 | if (len) { | |
433 | if (!nowayout) { | |
434 | size_t i; | |
435 | ||
436 | /* note: just in case someone wrote the magic character | |
437 | * five months ago... */ | |
438 | expect_release = 0; | |
439 | ||
440 | /* scan to see whether or not we got the magic character */ | |
441 | for (i = 0; i != len; i++) { | |
442 | char c; | |
7944d3a5 | 443 | if (get_user(c, data + i)) |
1da177e4 LT |
444 | return -EFAULT; |
445 | if (c == 'V') | |
446 | expect_release = 42; | |
447 | } | |
448 | } | |
449 | ||
450 | /* someone wrote to us, we should reload the timer */ | |
451 | pcipcwd_keepalive(); | |
452 | } | |
453 | return len; | |
454 | } | |
455 | ||
c9488520 AC |
456 | static long pcipcwd_ioctl(struct file *file, unsigned int cmd, |
457 | unsigned long arg) | |
1da177e4 LT |
458 | { |
459 | void __user *argp = (void __user *)arg; | |
460 | int __user *p = argp; | |
461 | static struct watchdog_info ident = { | |
462 | .options = WDIOF_OVERHEAT | | |
463 | WDIOF_CARDRESET | | |
464 | WDIOF_KEEPALIVEPING | | |
465 | WDIOF_SETTIMEOUT | | |
466 | WDIOF_MAGICCLOSE, | |
467 | .firmware_version = 1, | |
468 | .identity = WATCHDOG_DRIVER_NAME, | |
469 | }; | |
470 | ||
471 | switch (cmd) { | |
5eb82498 | 472 | case WDIOC_GETSUPPORT: |
7944d3a5 | 473 | return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0; |
5eb82498 WVS |
474 | |
475 | case WDIOC_GETSTATUS: | |
476 | { | |
477 | int status; | |
478 | pcipcwd_get_status(&status); | |
479 | return put_user(status, p); | |
480 | } | |
1da177e4 | 481 | |
5eb82498 WVS |
482 | case WDIOC_GETBOOTSTATUS: |
483 | return put_user(pcipcwd_private.boot_status, p); | |
1da177e4 | 484 | |
5eb82498 WVS |
485 | case WDIOC_GETTEMP: |
486 | { | |
487 | int temperature; | |
1da177e4 | 488 | |
5eb82498 WVS |
489 | if (pcipcwd_get_temperature(&temperature)) |
490 | return -EFAULT; | |
1da177e4 | 491 | |
5eb82498 WVS |
492 | return put_user(temperature, p); |
493 | } | |
1da177e4 | 494 | |
5eb82498 WVS |
495 | case WDIOC_SETOPTIONS: |
496 | { | |
497 | int new_options, retval = -EINVAL; | |
1da177e4 | 498 | |
7944d3a5 | 499 | if (get_user(new_options, p)) |
5eb82498 | 500 | return -EFAULT; |
1da177e4 | 501 | |
5eb82498 WVS |
502 | if (new_options & WDIOS_DISABLECARD) { |
503 | if (pcipcwd_stop()) | |
504 | return -EIO; | |
505 | retval = 0; | |
506 | } | |
1da177e4 | 507 | |
5eb82498 WVS |
508 | if (new_options & WDIOS_ENABLECARD) { |
509 | if (pcipcwd_start()) | |
510 | return -EIO; | |
511 | retval = 0; | |
512 | } | |
1da177e4 | 513 | |
5eb82498 WVS |
514 | if (new_options & WDIOS_TEMPPANIC) { |
515 | temp_panic = 1; | |
516 | retval = 0; | |
1da177e4 LT |
517 | } |
518 | ||
5eb82498 WVS |
519 | return retval; |
520 | } | |
1da177e4 | 521 | |
0c06090c WVS |
522 | case WDIOC_KEEPALIVE: |
523 | pcipcwd_keepalive(); | |
524 | return 0; | |
525 | ||
5eb82498 WVS |
526 | case WDIOC_SETTIMEOUT: |
527 | { | |
528 | int new_heartbeat; | |
1da177e4 | 529 | |
5eb82498 WVS |
530 | if (get_user(new_heartbeat, p)) |
531 | return -EFAULT; | |
1da177e4 | 532 | |
5eb82498 WVS |
533 | if (pcipcwd_set_heartbeat(new_heartbeat)) |
534 | return -EINVAL; | |
1da177e4 | 535 | |
5eb82498 WVS |
536 | pcipcwd_keepalive(); |
537 | /* Fall */ | |
538 | } | |
1da177e4 | 539 | |
5eb82498 WVS |
540 | case WDIOC_GETTIMEOUT: |
541 | return put_user(heartbeat, p); | |
58b519f3 | 542 | |
5eb82498 WVS |
543 | case WDIOC_GETTIMELEFT: |
544 | { | |
545 | int time_left; | |
58b519f3 | 546 | |
5eb82498 WVS |
547 | if (pcipcwd_get_timeleft(&time_left)) |
548 | return -EFAULT; | |
549 | ||
550 | return put_user(time_left, p); | |
551 | } | |
58b519f3 | 552 | |
5eb82498 WVS |
553 | default: |
554 | return -ENOTTY; | |
1da177e4 LT |
555 | } |
556 | } | |
557 | ||
558 | static int pcipcwd_open(struct inode *inode, struct file *file) | |
559 | { | |
560 | /* /dev/watchdog can only be opened once */ | |
a0800f6d | 561 | if (test_and_set_bit(0, &is_active)) { |
195331d7 WVS |
562 | if (debug >= VERBOSE) |
563 | printk(KERN_ERR PFX "Attempt to open already opened device.\n"); | |
1da177e4 | 564 | return -EBUSY; |
a0800f6d | 565 | } |
1da177e4 LT |
566 | |
567 | /* Activate */ | |
568 | pcipcwd_start(); | |
569 | pcipcwd_keepalive(); | |
570 | return nonseekable_open(inode, file); | |
571 | } | |
572 | ||
573 | static int pcipcwd_release(struct inode *inode, struct file *file) | |
574 | { | |
575 | /* | |
576 | * Shut off the timer. | |
577 | */ | |
578 | if (expect_release == 42) { | |
579 | pcipcwd_stop(); | |
580 | } else { | |
581 | printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n"); | |
582 | pcipcwd_keepalive(); | |
583 | } | |
584 | expect_release = 0; | |
585 | clear_bit(0, &is_active); | |
586 | return 0; | |
587 | } | |
588 | ||
589 | /* | |
590 | * /dev/temperature handling | |
591 | */ | |
592 | ||
593 | static ssize_t pcipcwd_temp_read(struct file *file, char __user *data, | |
594 | size_t len, loff_t *ppos) | |
595 | { | |
596 | int temperature; | |
597 | ||
598 | if (pcipcwd_get_temperature(&temperature)) | |
599 | return -EFAULT; | |
600 | ||
7944d3a5 | 601 | if (copy_to_user(data, &temperature, 1)) |
1da177e4 LT |
602 | return -EFAULT; |
603 | ||
604 | return 1; | |
605 | } | |
606 | ||
607 | static int pcipcwd_temp_open(struct inode *inode, struct file *file) | |
608 | { | |
609 | if (!pcipcwd_private.supports_temp) | |
610 | return -ENODEV; | |
611 | ||
612 | return nonseekable_open(inode, file); | |
613 | } | |
614 | ||
615 | static int pcipcwd_temp_release(struct inode *inode, struct file *file) | |
616 | { | |
617 | return 0; | |
618 | } | |
619 | ||
620 | /* | |
621 | * Notify system | |
622 | */ | |
623 | ||
624 | static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused) | |
625 | { | |
7944d3a5 WVS |
626 | if (code == SYS_DOWN || code == SYS_HALT) |
627 | pcipcwd_stop(); /* Turn the WDT off */ | |
1da177e4 LT |
628 | |
629 | return NOTIFY_DONE; | |
630 | } | |
631 | ||
632 | /* | |
633 | * Kernel Interfaces | |
634 | */ | |
635 | ||
62322d25 | 636 | static const struct file_operations pcipcwd_fops = { |
1da177e4 LT |
637 | .owner = THIS_MODULE, |
638 | .llseek = no_llseek, | |
639 | .write = pcipcwd_write, | |
c9488520 | 640 | .unlocked_ioctl = pcipcwd_ioctl, |
1da177e4 LT |
641 | .open = pcipcwd_open, |
642 | .release = pcipcwd_release, | |
643 | }; | |
644 | ||
645 | static struct miscdevice pcipcwd_miscdev = { | |
646 | .minor = WATCHDOG_MINOR, | |
647 | .name = "watchdog", | |
648 | .fops = &pcipcwd_fops, | |
649 | }; | |
650 | ||
62322d25 | 651 | static const struct file_operations pcipcwd_temp_fops = { |
1da177e4 LT |
652 | .owner = THIS_MODULE, |
653 | .llseek = no_llseek, | |
654 | .read = pcipcwd_temp_read, | |
655 | .open = pcipcwd_temp_open, | |
656 | .release = pcipcwd_temp_release, | |
657 | }; | |
658 | ||
659 | static struct miscdevice pcipcwd_temp_miscdev = { | |
660 | .minor = TEMP_MINOR, | |
661 | .name = "temperature", | |
662 | .fops = &pcipcwd_temp_fops, | |
663 | }; | |
664 | ||
665 | static struct notifier_block pcipcwd_notifier = { | |
666 | .notifier_call = pcipcwd_notify_sys, | |
667 | }; | |
668 | ||
669 | /* | |
670 | * Init & exit routines | |
671 | */ | |
672 | ||
1da177e4 LT |
673 | static int __devinit pcipcwd_card_init(struct pci_dev *pdev, |
674 | const struct pci_device_id *ent) | |
675 | { | |
676 | int ret = -EIO; | |
1da177e4 LT |
677 | |
678 | cards_found++; | |
679 | if (cards_found == 1) | |
680 | printk(KERN_INFO PFX DRIVER_VERSION); | |
681 | ||
682 | if (cards_found > 1) { | |
683 | printk(KERN_ERR PFX "This driver only supports 1 device\n"); | |
684 | return -ENODEV; | |
685 | } | |
686 | ||
687 | if (pci_enable_device(pdev)) { | |
688 | printk(KERN_ERR PFX "Not possible to enable PCI Device\n"); | |
689 | return -ENODEV; | |
690 | } | |
691 | ||
692 | if (pci_resource_start(pdev, 0) == 0x0000) { | |
693 | printk(KERN_ERR PFX "No I/O-Address for card detected\n"); | |
694 | ret = -ENODEV; | |
695 | goto err_out_disable_device; | |
696 | } | |
697 | ||
698 | pcipcwd_private.pdev = pdev; | |
699 | pcipcwd_private.io_addr = pci_resource_start(pdev, 0); | |
700 | ||
701 | if (pci_request_regions(pdev, WATCHDOG_NAME)) { | |
702 | printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", | |
703 | (int) pcipcwd_private.io_addr); | |
704 | ret = -EIO; | |
705 | goto err_out_disable_device; | |
706 | } | |
707 | ||
708 | /* get the boot_status */ | |
709 | pcipcwd_get_status(&pcipcwd_private.boot_status); | |
710 | ||
711 | /* clear the "card caused reboot" flag */ | |
712 | pcipcwd_clear_status(); | |
713 | ||
714 | /* disable card */ | |
715 | pcipcwd_stop(); | |
716 | ||
717 | /* Check whether or not the card supports the temperature device */ | |
a0800f6d | 718 | pcipcwd_check_temperature_support(); |
1da177e4 | 719 | |
a0800f6d WVS |
720 | /* Show info about the card itself */ |
721 | pcipcwd_show_card_info(); | |
1da177e4 | 722 | |
39e3a055 WVS |
723 | /* If heartbeat = 0 then we use the heartbeat from the dip-switches */ |
724 | if (heartbeat == 0) | |
725 | heartbeat = heartbeat_tbl[(pcipcwd_get_option_switches() & 0x07)]; | |
726 | ||
1da177e4 LT |
727 | /* Check that the heartbeat value is within it's range ; if not reset to the default */ |
728 | if (pcipcwd_set_heartbeat(heartbeat)) { | |
729 | pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT); | |
730 | printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n", | |
731 | WATCHDOG_HEARTBEAT); | |
732 | } | |
733 | ||
734 | ret = register_reboot_notifier(&pcipcwd_notifier); | |
735 | if (ret != 0) { | |
736 | printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", | |
737 | ret); | |
738 | goto err_out_release_region; | |
739 | } | |
740 | ||
741 | if (pcipcwd_private.supports_temp) { | |
742 | ret = misc_register(&pcipcwd_temp_miscdev); | |
743 | if (ret != 0) { | |
744 | printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", | |
745 | TEMP_MINOR, ret); | |
746 | goto err_out_unregister_reboot; | |
747 | } | |
748 | } | |
749 | ||
750 | ret = misc_register(&pcipcwd_miscdev); | |
751 | if (ret != 0) { | |
752 | printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", | |
753 | WATCHDOG_MINOR, ret); | |
754 | goto err_out_misc_deregister; | |
755 | } | |
756 | ||
757 | printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n", | |
758 | heartbeat, nowayout); | |
759 | ||
760 | return 0; | |
761 | ||
762 | err_out_misc_deregister: | |
763 | if (pcipcwd_private.supports_temp) | |
764 | misc_deregister(&pcipcwd_temp_miscdev); | |
765 | err_out_unregister_reboot: | |
766 | unregister_reboot_notifier(&pcipcwd_notifier); | |
767 | err_out_release_region: | |
768 | pci_release_regions(pdev); | |
769 | err_out_disable_device: | |
770 | pci_disable_device(pdev); | |
771 | return ret; | |
772 | } | |
773 | ||
774 | static void __devexit pcipcwd_card_exit(struct pci_dev *pdev) | |
775 | { | |
776 | /* Stop the timer before we leave */ | |
777 | if (!nowayout) | |
778 | pcipcwd_stop(); | |
779 | ||
780 | /* Deregister */ | |
781 | misc_deregister(&pcipcwd_miscdev); | |
782 | if (pcipcwd_private.supports_temp) | |
783 | misc_deregister(&pcipcwd_temp_miscdev); | |
784 | unregister_reboot_notifier(&pcipcwd_notifier); | |
785 | pci_release_regions(pdev); | |
786 | pci_disable_device(pdev); | |
787 | cards_found--; | |
788 | } | |
789 | ||
790 | static struct pci_device_id pcipcwd_pci_tbl[] = { | |
791 | { PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD, | |
792 | PCI_ANY_ID, PCI_ANY_ID, }, | |
793 | { 0 }, /* End of list */ | |
794 | }; | |
795 | MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl); | |
796 | ||
797 | static struct pci_driver pcipcwd_driver = { | |
798 | .name = WATCHDOG_NAME, | |
799 | .id_table = pcipcwd_pci_tbl, | |
800 | .probe = pcipcwd_card_init, | |
801 | .remove = __devexit_p(pcipcwd_card_exit), | |
802 | }; | |
803 | ||
804 | static int __init pcipcwd_init_module(void) | |
805 | { | |
a0800f6d | 806 | spin_lock_init(&pcipcwd_private.io_lock); |
1da177e4 LT |
807 | |
808 | return pci_register_driver(&pcipcwd_driver); | |
809 | } | |
810 | ||
811 | static void __exit pcipcwd_cleanup_module(void) | |
812 | { | |
813 | pci_unregister_driver(&pcipcwd_driver); | |
045798b5 WVS |
814 | |
815 | printk(KERN_INFO PFX "Watchdog Module Unloaded.\n"); | |
1da177e4 LT |
816 | } |
817 | ||
818 | module_init(pcipcwd_init_module); | |
819 | module_exit(pcipcwd_cleanup_module); | |
820 | ||
821 | MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>"); | |
822 | MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver"); | |
823 | MODULE_LICENSE("GPL"); | |
824 | MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); | |
825 | MODULE_ALIAS_MISCDEV(TEMP_MINOR); |