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Commit | Line | Data |
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9e0ea345 | 1 | /* |
cb711a19 | 2 | * intel TCO Watchdog Driver |
9e0ea345 | 3 | * |
d38bd479 | 4 | * (c) Copyright 2006-2010 Wim Van Sebroeck <wim@iguana.be>. |
9e0ea345 WVS |
5 | * |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor | |
12 | * provide warranty for any of this software. This material is | |
13 | * provided "AS-IS" and at no charge. | |
14 | * | |
15 | * The TCO watchdog is implemented in the following I/O controller hubs: | |
16 | * (See the intel documentation on http://developer.intel.com.) | |
cb711a19 WVS |
17 | * document number 290655-003, 290677-014: 82801AA (ICH), 82801AB (ICHO) |
18 | * document number 290687-002, 298242-027: 82801BA (ICH2) | |
19 | * document number 290733-003, 290739-013: 82801CA (ICH3-S) | |
20 | * document number 290716-001, 290718-007: 82801CAM (ICH3-M) | |
21 | * document number 290744-001, 290745-025: 82801DB (ICH4) | |
22 | * document number 252337-001, 252663-008: 82801DBM (ICH4-M) | |
23 | * document number 273599-001, 273645-002: 82801E (C-ICH) | |
24 | * document number 252516-001, 252517-028: 82801EB (ICH5), 82801ER (ICH5R) | |
25 | * document number 300641-004, 300884-013: 6300ESB | |
26 | * document number 301473-002, 301474-026: 82801F (ICH6) | |
27 | * document number 313082-001, 313075-006: 631xESB, 632xESB | |
28 | * document number 307013-003, 307014-024: 82801G (ICH7) | |
d38bd479 | 29 | * document number 322896-001, 322897-001: NM10 |
cb711a19 WVS |
30 | * document number 313056-003, 313057-017: 82801H (ICH8) |
31 | * document number 316972-004, 316973-012: 82801I (ICH9) | |
32 | * document number 319973-002, 319974-002: 82801J (ICH10) | |
3c9d8ecc | 33 | * document number 322169-001, 322170-003: 5 Series, 3400 Series (PCH) |
4946f835 | 34 | * document number 320066-003, 320257-008: EP80597 (IICH) |
203f8d89 | 35 | * document number 324645-001, 324646-001: Cougar Point (CPT) |
c54fb811 | 36 | * document number TBD : Patsburg (PBG) |
203f8d89 | 37 | * document number TBD : DH89xxCC |
9e0ea345 WVS |
38 | */ |
39 | ||
40 | /* | |
41 | * Includes, defines, variables, module parameters, ... | |
42 | */ | |
43 | ||
44 | /* Module and version information */ | |
7944d3a5 | 45 | #define DRV_NAME "iTCO_wdt" |
7e6811da | 46 | #define DRV_VERSION "1.06" |
9e0ea345 WVS |
47 | #define PFX DRV_NAME ": " |
48 | ||
49 | /* Includes */ | |
3836cc0f WVS |
50 | #include <linux/module.h> /* For module specific items */ |
51 | #include <linux/moduleparam.h> /* For new moduleparam's */ | |
52 | #include <linux/types.h> /* For standard types (like size_t) */ | |
53 | #include <linux/errno.h> /* For the -ENODEV/... values */ | |
54 | #include <linux/kernel.h> /* For printk/panic/... */ | |
0e6fa3fb AC |
55 | #include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV |
56 | (WATCHDOG_MINOR) */ | |
3836cc0f | 57 | #include <linux/watchdog.h> /* For the watchdog specific items */ |
3836cc0f WVS |
58 | #include <linux/init.h> /* For __init/__exit/... */ |
59 | #include <linux/fs.h> /* For file operations */ | |
60 | #include <linux/platform_device.h> /* For platform_driver framework */ | |
61 | #include <linux/pci.h> /* For pci functions */ | |
62 | #include <linux/ioport.h> /* For io-port access */ | |
63 | #include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */ | |
0e6fa3fb AC |
64 | #include <linux/uaccess.h> /* For copy_to_user/put_user/... */ |
65 | #include <linux/io.h> /* For inb/outb/... */ | |
3836cc0f | 66 | |
0e6fa3fb | 67 | #include "iTCO_vendor.h" |
9e0ea345 WVS |
68 | |
69 | /* TCO related info */ | |
70 | enum iTCO_chipsets { | |
71 | TCO_ICH = 0, /* ICH */ | |
72 | TCO_ICH0, /* ICH0 */ | |
73 | TCO_ICH2, /* ICH2 */ | |
74 | TCO_ICH2M, /* ICH2-M */ | |
75 | TCO_ICH3, /* ICH3-S */ | |
76 | TCO_ICH3M, /* ICH3-M */ | |
77 | TCO_ICH4, /* ICH4 */ | |
78 | TCO_ICH4M, /* ICH4-M */ | |
79 | TCO_CICH, /* C-ICH */ | |
80 | TCO_ICH5, /* ICH5 & ICH5R */ | |
81 | TCO_6300ESB, /* 6300ESB */ | |
82 | TCO_ICH6, /* ICH6 & ICH6R */ | |
83 | TCO_ICH6M, /* ICH6-M */ | |
84 | TCO_ICH6W, /* ICH6W & ICH6RW */ | |
28d41f53 | 85 | TCO_631XESB, /* 631xESB/632xESB */ |
9e0ea345 | 86 | TCO_ICH7, /* ICH7 & ICH7R */ |
28d41f53 WVS |
87 | TCO_ICH7DH, /* ICH7DH */ |
88 | TCO_ICH7M, /* ICH7-M & ICH7-U */ | |
9e0ea345 | 89 | TCO_ICH7MDH, /* ICH7-M DH */ |
d38bd479 | 90 | TCO_NM10, /* NM10 */ |
a8edd74e WVS |
91 | TCO_ICH8, /* ICH8 & ICH8R */ |
92 | TCO_ICH8DH, /* ICH8DH */ | |
93 | TCO_ICH8DO, /* ICH8DO */ | |
acf60351 | 94 | TCO_ICH8M, /* ICH8M */ |
28d41f53 | 95 | TCO_ICH8ME, /* ICH8M-E */ |
286201dc WVS |
96 | TCO_ICH9, /* ICH9 */ |
97 | TCO_ICH9R, /* ICH9R */ | |
98 | TCO_ICH9DH, /* ICH9DH */ | |
7944d3a5 | 99 | TCO_ICH9DO, /* ICH9DO */ |
28d41f53 WVS |
100 | TCO_ICH9M, /* ICH9M */ |
101 | TCO_ICH9ME, /* ICH9M-E */ | |
102 | TCO_ICH10, /* ICH10 */ | |
103 | TCO_ICH10R, /* ICH10R */ | |
104 | TCO_ICH10D, /* ICH10D */ | |
105 | TCO_ICH10DO, /* ICH10DO */ | |
79e8941d SH |
106 | TCO_PCH, /* PCH Desktop Full Featured */ |
107 | TCO_PCHM, /* PCH Mobile Full Featured */ | |
3c9d8ecc SH |
108 | TCO_P55, /* P55 */ |
109 | TCO_PM55, /* PM55 */ | |
110 | TCO_H55, /* H55 */ | |
111 | TCO_QM57, /* QM57 */ | |
112 | TCO_H57, /* H57 */ | |
113 | TCO_HM55, /* HM55 */ | |
114 | TCO_Q57, /* Q57 */ | |
115 | TCO_HM57, /* HM57 */ | |
79e8941d | 116 | TCO_PCHMSFF, /* PCH Mobile SFF Full Featured */ |
3c9d8ecc SH |
117 | TCO_QS57, /* QS57 */ |
118 | TCO_3400, /* 3400 */ | |
119 | TCO_3420, /* 3420 */ | |
120 | TCO_3450, /* 3450 */ | |
4946f835 | 121 | TCO_EP80579, /* EP80579 */ |
4c7d8492 SH |
122 | TCO_CPT1, /* Cougar Point */ |
123 | TCO_CPT2, /* Cougar Point Desktop */ | |
124 | TCO_CPT3, /* Cougar Point Mobile */ | |
125 | TCO_CPT4, /* Cougar Point */ | |
126 | TCO_CPT5, /* Cougar Point */ | |
127 | TCO_CPT6, /* Cougar Point */ | |
128 | TCO_CPT7, /* Cougar Point */ | |
129 | TCO_CPT8, /* Cougar Point */ | |
130 | TCO_CPT9, /* Cougar Point */ | |
131 | TCO_CPT10, /* Cougar Point */ | |
132 | TCO_CPT11, /* Cougar Point */ | |
133 | TCO_CPT12, /* Cougar Point */ | |
134 | TCO_CPT13, /* Cougar Point */ | |
135 | TCO_CPT14, /* Cougar Point */ | |
136 | TCO_CPT15, /* Cougar Point */ | |
137 | TCO_CPT16, /* Cougar Point */ | |
138 | TCO_CPT17, /* Cougar Point */ | |
139 | TCO_CPT18, /* Cougar Point */ | |
140 | TCO_CPT19, /* Cougar Point */ | |
141 | TCO_CPT20, /* Cougar Point */ | |
142 | TCO_CPT21, /* Cougar Point */ | |
143 | TCO_CPT22, /* Cougar Point */ | |
144 | TCO_CPT23, /* Cougar Point */ | |
145 | TCO_CPT24, /* Cougar Point */ | |
146 | TCO_CPT25, /* Cougar Point */ | |
147 | TCO_CPT26, /* Cougar Point */ | |
148 | TCO_CPT27, /* Cougar Point */ | |
149 | TCO_CPT28, /* Cougar Point */ | |
150 | TCO_CPT29, /* Cougar Point */ | |
151 | TCO_CPT30, /* Cougar Point */ | |
152 | TCO_CPT31, /* Cougar Point */ | |
c54fb811 SH |
153 | TCO_PBG1, /* Patsburg */ |
154 | TCO_PBG2, /* Patsburg */ | |
203f8d89 | 155 | TCO_DH89XXCC, /* DH89xxCC */ |
9e0ea345 WVS |
156 | }; |
157 | ||
158 | static struct { | |
159 | char *name; | |
160 | unsigned int iTCO_version; | |
161 | } iTCO_chipset_info[] __devinitdata = { | |
162 | {"ICH", 1}, | |
163 | {"ICH0", 1}, | |
164 | {"ICH2", 1}, | |
165 | {"ICH2-M", 1}, | |
166 | {"ICH3-S", 1}, | |
167 | {"ICH3-M", 1}, | |
168 | {"ICH4", 1}, | |
169 | {"ICH4-M", 1}, | |
170 | {"C-ICH", 1}, | |
171 | {"ICH5 or ICH5R", 1}, | |
172 | {"6300ESB", 1}, | |
173 | {"ICH6 or ICH6R", 2}, | |
174 | {"ICH6-M", 2}, | |
175 | {"ICH6W or ICH6RW", 2}, | |
28d41f53 | 176 | {"631xESB/632xESB", 2}, |
9e0ea345 | 177 | {"ICH7 or ICH7R", 2}, |
28d41f53 WVS |
178 | {"ICH7DH", 2}, |
179 | {"ICH7-M or ICH7-U", 2}, | |
9e0ea345 | 180 | {"ICH7-M DH", 2}, |
d38bd479 | 181 | {"NM10", 2}, |
bcbf25bd | 182 | {"ICH8 or ICH8R", 2}, |
a8edd74e WVS |
183 | {"ICH8DH", 2}, |
184 | {"ICH8DO", 2}, | |
acf60351 | 185 | {"ICH8M", 2}, |
28d41f53 | 186 | {"ICH8M-E", 2}, |
286201dc WVS |
187 | {"ICH9", 2}, |
188 | {"ICH9R", 2}, | |
189 | {"ICH9DH", 2}, | |
a49056da | 190 | {"ICH9DO", 2}, |
28d41f53 WVS |
191 | {"ICH9M", 2}, |
192 | {"ICH9M-E", 2}, | |
193 | {"ICH10", 2}, | |
194 | {"ICH10R", 2}, | |
195 | {"ICH10D", 2}, | |
196 | {"ICH10DO", 2}, | |
79e8941d SH |
197 | {"PCH Desktop Full Featured", 2}, |
198 | {"PCH Mobile Full Featured", 2}, | |
3c9d8ecc SH |
199 | {"P55", 2}, |
200 | {"PM55", 2}, | |
201 | {"H55", 2}, | |
202 | {"QM57", 2}, | |
203 | {"H57", 2}, | |
204 | {"HM55", 2}, | |
205 | {"Q57", 2}, | |
206 | {"HM57", 2}, | |
79e8941d | 207 | {"PCH Mobile SFF Full Featured", 2}, |
3c9d8ecc SH |
208 | {"QS57", 2}, |
209 | {"3400", 2}, | |
210 | {"3420", 2}, | |
211 | {"3450", 2}, | |
4946f835 | 212 | {"EP80579", 2}, |
4c7d8492 SH |
213 | {"Cougar Point", 2}, |
214 | {"Cougar Point", 2}, | |
215 | {"Cougar Point", 2}, | |
216 | {"Cougar Point", 2}, | |
217 | {"Cougar Point", 2}, | |
218 | {"Cougar Point", 2}, | |
219 | {"Cougar Point", 2}, | |
220 | {"Cougar Point", 2}, | |
221 | {"Cougar Point", 2}, | |
222 | {"Cougar Point", 2}, | |
223 | {"Cougar Point", 2}, | |
224 | {"Cougar Point", 2}, | |
225 | {"Cougar Point", 2}, | |
226 | {"Cougar Point", 2}, | |
227 | {"Cougar Point", 2}, | |
228 | {"Cougar Point", 2}, | |
229 | {"Cougar Point", 2}, | |
230 | {"Cougar Point", 2}, | |
231 | {"Cougar Point", 2}, | |
232 | {"Cougar Point", 2}, | |
233 | {"Cougar Point", 2}, | |
234 | {"Cougar Point", 2}, | |
235 | {"Cougar Point", 2}, | |
236 | {"Cougar Point", 2}, | |
237 | {"Cougar Point", 2}, | |
238 | {"Cougar Point", 2}, | |
239 | {"Cougar Point", 2}, | |
240 | {"Cougar Point", 2}, | |
241 | {"Cougar Point", 2}, | |
242 | {"Cougar Point", 2}, | |
243 | {"Cougar Point", 2}, | |
cad0df37 | 244 | {"Patsburg", 2}, |
c54fb811 | 245 | {"Patsburg", 2}, |
203f8d89 | 246 | {"DH89xxCC", 2}, |
0e6fa3fb | 247 | {NULL, 0} |
9e0ea345 WVS |
248 | }; |
249 | ||
c87b639a WVS |
250 | #define ITCO_PCI_DEVICE(dev, data) \ |
251 | .vendor = PCI_VENDOR_ID_INTEL, \ | |
252 | .device = dev, \ | |
253 | .subvendor = PCI_ANY_ID, \ | |
254 | .subdevice = PCI_ANY_ID, \ | |
255 | .class = 0, \ | |
256 | .class_mask = 0, \ | |
257 | .driver_data = data | |
258 | ||
9e0ea345 WVS |
259 | /* |
260 | * This data only exists for exporting the supported PCI ids | |
261 | * via MODULE_DEVICE_TABLE. We do not actually register a | |
262 | * pci_driver, because the I/O Controller Hub has also other | |
263 | * functions that probably will be registered by other drivers. | |
264 | */ | |
265 | static struct pci_device_id iTCO_wdt_pci_tbl[] = { | |
0e6fa3fb AC |
266 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801AA_0, TCO_ICH)}, |
267 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801AB_0, TCO_ICH0)}, | |
268 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801BA_0, TCO_ICH2)}, | |
269 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801BA_10, TCO_ICH2M)}, | |
270 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801CA_0, TCO_ICH3)}, | |
271 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801CA_12, TCO_ICH3M)}, | |
272 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801DB_0, TCO_ICH4)}, | |
273 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801DB_12, TCO_ICH4M)}, | |
274 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801E_0, TCO_CICH)}, | |
275 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801EB_0, TCO_ICH5)}, | |
c87b639a | 276 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ESB_1, TCO_6300ESB)}, |
0e6fa3fb AC |
277 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_0, TCO_ICH6)}, |
278 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_1, TCO_ICH6M)}, | |
279 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_2, TCO_ICH6W)}, | |
c87b639a WVS |
280 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ESB2_0, TCO_631XESB)}, |
281 | { ITCO_PCI_DEVICE(0x2671, TCO_631XESB)}, | |
282 | { ITCO_PCI_DEVICE(0x2672, TCO_631XESB)}, | |
283 | { ITCO_PCI_DEVICE(0x2673, TCO_631XESB)}, | |
284 | { ITCO_PCI_DEVICE(0x2674, TCO_631XESB)}, | |
285 | { ITCO_PCI_DEVICE(0x2675, TCO_631XESB)}, | |
286 | { ITCO_PCI_DEVICE(0x2676, TCO_631XESB)}, | |
287 | { ITCO_PCI_DEVICE(0x2677, TCO_631XESB)}, | |
288 | { ITCO_PCI_DEVICE(0x2678, TCO_631XESB)}, | |
289 | { ITCO_PCI_DEVICE(0x2679, TCO_631XESB)}, | |
290 | { ITCO_PCI_DEVICE(0x267a, TCO_631XESB)}, | |
291 | { ITCO_PCI_DEVICE(0x267b, TCO_631XESB)}, | |
292 | { ITCO_PCI_DEVICE(0x267c, TCO_631XESB)}, | |
293 | { ITCO_PCI_DEVICE(0x267d, TCO_631XESB)}, | |
294 | { ITCO_PCI_DEVICE(0x267e, TCO_631XESB)}, | |
295 | { ITCO_PCI_DEVICE(0x267f, TCO_631XESB)}, | |
28d41f53 WVS |
296 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_0, TCO_ICH7)}, |
297 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_30, TCO_ICH7DH)}, | |
298 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_1, TCO_ICH7M)}, | |
299 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_31, TCO_ICH7MDH)}, | |
d38bd479 | 300 | { ITCO_PCI_DEVICE(0x27bc, TCO_NM10)}, |
28d41f53 WVS |
301 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_0, TCO_ICH8)}, |
302 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_2, TCO_ICH8DH)}, | |
303 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_3, TCO_ICH8DO)}, | |
304 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_4, TCO_ICH8M)}, | |
305 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_1, TCO_ICH8ME)}, | |
306 | { ITCO_PCI_DEVICE(0x2918, TCO_ICH9)}, | |
307 | { ITCO_PCI_DEVICE(0x2916, TCO_ICH9R)}, | |
308 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_2, TCO_ICH9DH)}, | |
309 | { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_4, TCO_ICH9DO)}, | |
310 | { ITCO_PCI_DEVICE(0x2919, TCO_ICH9M)}, | |
311 | { ITCO_PCI_DEVICE(0x2917, TCO_ICH9ME)}, | |
312 | { ITCO_PCI_DEVICE(0x3a18, TCO_ICH10)}, | |
313 | { ITCO_PCI_DEVICE(0x3a16, TCO_ICH10R)}, | |
314 | { ITCO_PCI_DEVICE(0x3a1a, TCO_ICH10D)}, | |
315 | { ITCO_PCI_DEVICE(0x3a14, TCO_ICH10DO)}, | |
79e8941d SH |
316 | { ITCO_PCI_DEVICE(0x3b00, TCO_PCH)}, |
317 | { ITCO_PCI_DEVICE(0x3b01, TCO_PCHM)}, | |
3c9d8ecc SH |
318 | { ITCO_PCI_DEVICE(0x3b02, TCO_P55)}, |
319 | { ITCO_PCI_DEVICE(0x3b03, TCO_PM55)}, | |
320 | { ITCO_PCI_DEVICE(0x3b06, TCO_H55)}, | |
321 | { ITCO_PCI_DEVICE(0x3b07, TCO_QM57)}, | |
322 | { ITCO_PCI_DEVICE(0x3b08, TCO_H57)}, | |
323 | { ITCO_PCI_DEVICE(0x3b09, TCO_HM55)}, | |
324 | { ITCO_PCI_DEVICE(0x3b0a, TCO_Q57)}, | |
325 | { ITCO_PCI_DEVICE(0x3b0b, TCO_HM57)}, | |
79e8941d | 326 | { ITCO_PCI_DEVICE(0x3b0d, TCO_PCHMSFF)}, |
3c9d8ecc SH |
327 | { ITCO_PCI_DEVICE(0x3b0f, TCO_QS57)}, |
328 | { ITCO_PCI_DEVICE(0x3b12, TCO_3400)}, | |
329 | { ITCO_PCI_DEVICE(0x3b14, TCO_3420)}, | |
330 | { ITCO_PCI_DEVICE(0x3b16, TCO_3450)}, | |
4946f835 | 331 | { ITCO_PCI_DEVICE(0x5031, TCO_EP80579)}, |
4c7d8492 SH |
332 | { ITCO_PCI_DEVICE(0x1c41, TCO_CPT1)}, |
333 | { ITCO_PCI_DEVICE(0x1c42, TCO_CPT2)}, | |
334 | { ITCO_PCI_DEVICE(0x1c43, TCO_CPT3)}, | |
335 | { ITCO_PCI_DEVICE(0x1c44, TCO_CPT4)}, | |
336 | { ITCO_PCI_DEVICE(0x1c45, TCO_CPT5)}, | |
337 | { ITCO_PCI_DEVICE(0x1c46, TCO_CPT6)}, | |
338 | { ITCO_PCI_DEVICE(0x1c47, TCO_CPT7)}, | |
339 | { ITCO_PCI_DEVICE(0x1c48, TCO_CPT8)}, | |
340 | { ITCO_PCI_DEVICE(0x1c49, TCO_CPT9)}, | |
341 | { ITCO_PCI_DEVICE(0x1c4a, TCO_CPT10)}, | |
342 | { ITCO_PCI_DEVICE(0x1c4b, TCO_CPT11)}, | |
343 | { ITCO_PCI_DEVICE(0x1c4c, TCO_CPT12)}, | |
344 | { ITCO_PCI_DEVICE(0x1c4d, TCO_CPT13)}, | |
345 | { ITCO_PCI_DEVICE(0x1c4e, TCO_CPT14)}, | |
346 | { ITCO_PCI_DEVICE(0x1c4f, TCO_CPT15)}, | |
347 | { ITCO_PCI_DEVICE(0x1c50, TCO_CPT16)}, | |
348 | { ITCO_PCI_DEVICE(0x1c51, TCO_CPT17)}, | |
349 | { ITCO_PCI_DEVICE(0x1c52, TCO_CPT18)}, | |
350 | { ITCO_PCI_DEVICE(0x1c53, TCO_CPT19)}, | |
351 | { ITCO_PCI_DEVICE(0x1c54, TCO_CPT20)}, | |
352 | { ITCO_PCI_DEVICE(0x1c55, TCO_CPT21)}, | |
353 | { ITCO_PCI_DEVICE(0x1c56, TCO_CPT22)}, | |
354 | { ITCO_PCI_DEVICE(0x1c57, TCO_CPT23)}, | |
355 | { ITCO_PCI_DEVICE(0x1c58, TCO_CPT24)}, | |
356 | { ITCO_PCI_DEVICE(0x1c59, TCO_CPT25)}, | |
357 | { ITCO_PCI_DEVICE(0x1c5a, TCO_CPT26)}, | |
358 | { ITCO_PCI_DEVICE(0x1c5b, TCO_CPT27)}, | |
359 | { ITCO_PCI_DEVICE(0x1c5c, TCO_CPT28)}, | |
360 | { ITCO_PCI_DEVICE(0x1c5d, TCO_CPT29)}, | |
361 | { ITCO_PCI_DEVICE(0x1c5e, TCO_CPT30)}, | |
362 | { ITCO_PCI_DEVICE(0x1c5f, TCO_CPT31)}, | |
c54fb811 SH |
363 | { ITCO_PCI_DEVICE(0x1d40, TCO_PBG1)}, |
364 | { ITCO_PCI_DEVICE(0x1d41, TCO_PBG2)}, | |
203f8d89 | 365 | { ITCO_PCI_DEVICE(0x2310, TCO_DH89XXCC)}, |
9e0ea345 WVS |
366 | { 0, }, /* End of list */ |
367 | }; | |
0e6fa3fb | 368 | MODULE_DEVICE_TABLE(pci, iTCO_wdt_pci_tbl); |
9e0ea345 WVS |
369 | |
370 | /* Address definitions for the TCO */ | |
0e6fa3fb | 371 | /* TCO base address */ |
0a7e6582 | 372 | #define TCOBASE (iTCO_wdt_private.ACPIBASE + 0x60) |
0e6fa3fb | 373 | /* SMI Control and Enable Register */ |
0a7e6582 | 374 | #define SMI_EN (iTCO_wdt_private.ACPIBASE + 0x30) |
9e0ea345 | 375 | |
0a7e6582 WVS |
376 | #define TCO_RLD (TCOBASE + 0x00) /* TCO Timer Reload and Curr. Value */ |
377 | #define TCOv1_TMR (TCOBASE + 0x01) /* TCOv1 Timer Initial Value */ | |
378 | #define TCO_DAT_IN (TCOBASE + 0x02) /* TCO Data In Register */ | |
379 | #define TCO_DAT_OUT (TCOBASE + 0x03) /* TCO Data Out Register */ | |
380 | #define TCO1_STS (TCOBASE + 0x04) /* TCO1 Status Register */ | |
381 | #define TCO2_STS (TCOBASE + 0x06) /* TCO2 Status Register */ | |
382 | #define TCO1_CNT (TCOBASE + 0x08) /* TCO1 Control Register */ | |
383 | #define TCO2_CNT (TCOBASE + 0x0a) /* TCO2 Control Register */ | |
384 | #define TCOv2_TMR (TCOBASE + 0x12) /* TCOv2 Timer Initial Value */ | |
9e0ea345 WVS |
385 | |
386 | /* internal variables */ | |
387 | static unsigned long is_active; | |
388 | static char expect_release; | |
0e6fa3fb AC |
389 | static struct { /* this is private data for the iTCO_wdt device */ |
390 | /* TCO version/generation */ | |
391 | unsigned int iTCO_version; | |
641912f4 | 392 | /* The device's ACPIBASE address (TCOBASE = ACPIBASE+0x60) */ |
0e6fa3fb AC |
393 | unsigned long ACPIBASE; |
394 | /* NO_REBOOT flag is Memory-Mapped GCS register bit 5 (TCO version 2)*/ | |
395 | unsigned long __iomem *gcs; | |
396 | /* the lock for io operations */ | |
397 | spinlock_t io_lock; | |
398 | /* the PCI-device */ | |
399 | struct pci_dev *pdev; | |
9e0ea345 WVS |
400 | } iTCO_wdt_private; |
401 | ||
0e6fa3fb AC |
402 | /* the watchdog platform device */ |
403 | static struct platform_device *iTCO_wdt_platform_device; | |
3836cc0f | 404 | |
9e0ea345 WVS |
405 | /* module parameters */ |
406 | #define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat */ | |
407 | static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */ | |
408 | module_param(heartbeat, int, 0); | |
7e6811da PB |
409 | MODULE_PARM_DESC(heartbeat, "Watchdog timeout in seconds. " |
410 | "5..76 (TCO v1) or 3..614 (TCO v2), default=" | |
143a2e54 | 411 | __MODULE_STRING(WATCHDOG_HEARTBEAT) ")"); |
9e0ea345 WVS |
412 | |
413 | static int nowayout = WATCHDOG_NOWAYOUT; | |
414 | module_param(nowayout, int, 0); | |
0e6fa3fb AC |
415 | MODULE_PARM_DESC(nowayout, |
416 | "Watchdog cannot be stopped once started (default=" | |
417 | __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); | |
e033351d | 418 | |
9e0ea345 WVS |
419 | /* |
420 | * Some TCO specific functions | |
421 | */ | |
422 | ||
423 | static inline unsigned int seconds_to_ticks(int seconds) | |
424 | { | |
425 | /* the internal timer is stored as ticks which decrement | |
426 | * every 0.6 seconds */ | |
427 | return (seconds * 10) / 6; | |
428 | } | |
429 | ||
430 | static void iTCO_wdt_set_NO_REBOOT_bit(void) | |
431 | { | |
432 | u32 val32; | |
433 | ||
434 | /* Set the NO_REBOOT bit: this disables reboots */ | |
435 | if (iTCO_wdt_private.iTCO_version == 2) { | |
436 | val32 = readl(iTCO_wdt_private.gcs); | |
437 | val32 |= 0x00000020; | |
438 | writel(val32, iTCO_wdt_private.gcs); | |
439 | } else if (iTCO_wdt_private.iTCO_version == 1) { | |
440 | pci_read_config_dword(iTCO_wdt_private.pdev, 0xd4, &val32); | |
441 | val32 |= 0x00000002; | |
442 | pci_write_config_dword(iTCO_wdt_private.pdev, 0xd4, val32); | |
443 | } | |
444 | } | |
445 | ||
446 | static int iTCO_wdt_unset_NO_REBOOT_bit(void) | |
447 | { | |
448 | int ret = 0; | |
449 | u32 val32; | |
450 | ||
451 | /* Unset the NO_REBOOT bit: this enables reboots */ | |
452 | if (iTCO_wdt_private.iTCO_version == 2) { | |
453 | val32 = readl(iTCO_wdt_private.gcs); | |
454 | val32 &= 0xffffffdf; | |
455 | writel(val32, iTCO_wdt_private.gcs); | |
456 | ||
457 | val32 = readl(iTCO_wdt_private.gcs); | |
458 | if (val32 & 0x00000020) | |
459 | ret = -EIO; | |
460 | } else if (iTCO_wdt_private.iTCO_version == 1) { | |
461 | pci_read_config_dword(iTCO_wdt_private.pdev, 0xd4, &val32); | |
462 | val32 &= 0xfffffffd; | |
463 | pci_write_config_dword(iTCO_wdt_private.pdev, 0xd4, val32); | |
464 | ||
465 | pci_read_config_dword(iTCO_wdt_private.pdev, 0xd4, &val32); | |
466 | if (val32 & 0x00000002) | |
467 | ret = -EIO; | |
468 | } | |
469 | ||
470 | return ret; /* returns: 0 = OK, -EIO = Error */ | |
471 | } | |
472 | ||
473 | static int iTCO_wdt_start(void) | |
474 | { | |
475 | unsigned int val; | |
476 | ||
477 | spin_lock(&iTCO_wdt_private.io_lock); | |
478 | ||
e033351d WVS |
479 | iTCO_vendor_pre_start(iTCO_wdt_private.ACPIBASE, heartbeat); |
480 | ||
9e0ea345 WVS |
481 | /* disable chipset's NO_REBOOT bit */ |
482 | if (iTCO_wdt_unset_NO_REBOOT_bit()) { | |
2ba7d7b3 | 483 | spin_unlock(&iTCO_wdt_private.io_lock); |
143a2e54 | 484 | printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, " |
641912f4 | 485 | "reboot disabled by hardware/BIOS\n"); |
9e0ea345 WVS |
486 | return -EIO; |
487 | } | |
488 | ||
7cd5b08b WVS |
489 | /* Force the timer to its reload value by writing to the TCO_RLD |
490 | register */ | |
491 | if (iTCO_wdt_private.iTCO_version == 2) | |
492 | outw(0x01, TCO_RLD); | |
493 | else if (iTCO_wdt_private.iTCO_version == 1) | |
494 | outb(0x01, TCO_RLD); | |
495 | ||
9e0ea345 WVS |
496 | /* Bit 11: TCO Timer Halt -> 0 = The TCO timer is enabled to count */ |
497 | val = inw(TCO1_CNT); | |
498 | val &= 0xf7ff; | |
499 | outw(val, TCO1_CNT); | |
500 | val = inw(TCO1_CNT); | |
501 | spin_unlock(&iTCO_wdt_private.io_lock); | |
502 | ||
503 | if (val & 0x0800) | |
504 | return -1; | |
505 | return 0; | |
506 | } | |
507 | ||
508 | static int iTCO_wdt_stop(void) | |
509 | { | |
510 | unsigned int val; | |
511 | ||
512 | spin_lock(&iTCO_wdt_private.io_lock); | |
513 | ||
e033351d WVS |
514 | iTCO_vendor_pre_stop(iTCO_wdt_private.ACPIBASE); |
515 | ||
9e0ea345 WVS |
516 | /* Bit 11: TCO Timer Halt -> 1 = The TCO timer is disabled */ |
517 | val = inw(TCO1_CNT); | |
518 | val |= 0x0800; | |
519 | outw(val, TCO1_CNT); | |
520 | val = inw(TCO1_CNT); | |
521 | ||
522 | /* Set the NO_REBOOT bit to prevent later reboots, just for sure */ | |
523 | iTCO_wdt_set_NO_REBOOT_bit(); | |
524 | ||
525 | spin_unlock(&iTCO_wdt_private.io_lock); | |
526 | ||
527 | if ((val & 0x0800) == 0) | |
528 | return -1; | |
529 | return 0; | |
530 | } | |
531 | ||
532 | static int iTCO_wdt_keepalive(void) | |
533 | { | |
534 | spin_lock(&iTCO_wdt_private.io_lock); | |
535 | ||
e033351d WVS |
536 | iTCO_vendor_pre_keepalive(iTCO_wdt_private.ACPIBASE, heartbeat); |
537 | ||
9e0ea345 | 538 | /* Reload the timer by writing to the TCO Timer Counter register */ |
0e6fa3fb | 539 | if (iTCO_wdt_private.iTCO_version == 2) |
9e0ea345 | 540 | outw(0x01, TCO_RLD); |
7e6811da PB |
541 | else if (iTCO_wdt_private.iTCO_version == 1) { |
542 | /* Reset the timeout status bit so that the timer | |
543 | * needs to count down twice again before rebooting */ | |
544 | outw(0x0008, TCO1_STS); /* write 1 to clear bit */ | |
545 | ||
9e0ea345 | 546 | outb(0x01, TCO_RLD); |
7e6811da | 547 | } |
9e0ea345 WVS |
548 | |
549 | spin_unlock(&iTCO_wdt_private.io_lock); | |
550 | return 0; | |
551 | } | |
552 | ||
553 | static int iTCO_wdt_set_heartbeat(int t) | |
554 | { | |
555 | unsigned int val16; | |
556 | unsigned char val8; | |
557 | unsigned int tmrval; | |
558 | ||
559 | tmrval = seconds_to_ticks(t); | |
7e6811da PB |
560 | |
561 | /* For TCO v1 the timer counts down twice before rebooting */ | |
562 | if (iTCO_wdt_private.iTCO_version == 1) | |
563 | tmrval /= 2; | |
564 | ||
9e0ea345 WVS |
565 | /* from the specs: */ |
566 | /* "Values of 0h-3h are ignored and should not be attempted" */ | |
567 | if (tmrval < 0x04) | |
568 | return -EINVAL; | |
569 | if (((iTCO_wdt_private.iTCO_version == 2) && (tmrval > 0x3ff)) || | |
570 | ((iTCO_wdt_private.iTCO_version == 1) && (tmrval > 0x03f))) | |
571 | return -EINVAL; | |
572 | ||
e033351d WVS |
573 | iTCO_vendor_pre_set_heartbeat(tmrval); |
574 | ||
9e0ea345 WVS |
575 | /* Write new heartbeat to watchdog */ |
576 | if (iTCO_wdt_private.iTCO_version == 2) { | |
577 | spin_lock(&iTCO_wdt_private.io_lock); | |
578 | val16 = inw(TCOv2_TMR); | |
579 | val16 &= 0xfc00; | |
580 | val16 |= tmrval; | |
581 | outw(val16, TCOv2_TMR); | |
582 | val16 = inw(TCOv2_TMR); | |
583 | spin_unlock(&iTCO_wdt_private.io_lock); | |
584 | ||
585 | if ((val16 & 0x3ff) != tmrval) | |
586 | return -EINVAL; | |
587 | } else if (iTCO_wdt_private.iTCO_version == 1) { | |
588 | spin_lock(&iTCO_wdt_private.io_lock); | |
589 | val8 = inb(TCOv1_TMR); | |
590 | val8 &= 0xc0; | |
591 | val8 |= (tmrval & 0xff); | |
592 | outb(val8, TCOv1_TMR); | |
593 | val8 = inb(TCOv1_TMR); | |
594 | spin_unlock(&iTCO_wdt_private.io_lock); | |
595 | ||
596 | if ((val8 & 0x3f) != tmrval) | |
597 | return -EINVAL; | |
598 | } | |
599 | ||
600 | heartbeat = t; | |
601 | return 0; | |
602 | } | |
603 | ||
0e6fa3fb | 604 | static int iTCO_wdt_get_timeleft(int *time_left) |
9e0ea345 WVS |
605 | { |
606 | unsigned int val16; | |
607 | unsigned char val8; | |
608 | ||
609 | /* read the TCO Timer */ | |
610 | if (iTCO_wdt_private.iTCO_version == 2) { | |
611 | spin_lock(&iTCO_wdt_private.io_lock); | |
612 | val16 = inw(TCO_RLD); | |
613 | val16 &= 0x3ff; | |
614 | spin_unlock(&iTCO_wdt_private.io_lock); | |
615 | ||
616 | *time_left = (val16 * 6) / 10; | |
617 | } else if (iTCO_wdt_private.iTCO_version == 1) { | |
618 | spin_lock(&iTCO_wdt_private.io_lock); | |
619 | val8 = inb(TCO_RLD); | |
620 | val8 &= 0x3f; | |
7e6811da PB |
621 | if (!(inw(TCO1_STS) & 0x0008)) |
622 | val8 += (inb(TCOv1_TMR) & 0x3f); | |
9e0ea345 WVS |
623 | spin_unlock(&iTCO_wdt_private.io_lock); |
624 | ||
625 | *time_left = (val8 * 6) / 10; | |
80060362 JG |
626 | } else |
627 | return -EINVAL; | |
9e0ea345 WVS |
628 | return 0; |
629 | } | |
630 | ||
631 | /* | |
632 | * /dev/watchdog handling | |
633 | */ | |
634 | ||
0e6fa3fb | 635 | static int iTCO_wdt_open(struct inode *inode, struct file *file) |
9e0ea345 WVS |
636 | { |
637 | /* /dev/watchdog can only be opened once */ | |
638 | if (test_and_set_bit(0, &is_active)) | |
639 | return -EBUSY; | |
640 | ||
641 | /* | |
642 | * Reload and activate timer | |
643 | */ | |
9e0ea345 WVS |
644 | iTCO_wdt_start(); |
645 | return nonseekable_open(inode, file); | |
646 | } | |
647 | ||
0e6fa3fb | 648 | static int iTCO_wdt_release(struct inode *inode, struct file *file) |
9e0ea345 WVS |
649 | { |
650 | /* | |
651 | * Shut off the timer. | |
652 | */ | |
653 | if (expect_release == 42) { | |
654 | iTCO_wdt_stop(); | |
655 | } else { | |
0e6fa3fb AC |
656 | printk(KERN_CRIT PFX |
657 | "Unexpected close, not stopping watchdog!\n"); | |
9e0ea345 WVS |
658 | iTCO_wdt_keepalive(); |
659 | } | |
660 | clear_bit(0, &is_active); | |
661 | expect_release = 0; | |
662 | return 0; | |
663 | } | |
664 | ||
0e6fa3fb AC |
665 | static ssize_t iTCO_wdt_write(struct file *file, const char __user *data, |
666 | size_t len, loff_t *ppos) | |
9e0ea345 WVS |
667 | { |
668 | /* See if we got the magic character 'V' and reload the timer */ | |
669 | if (len) { | |
670 | if (!nowayout) { | |
671 | size_t i; | |
672 | ||
0e6fa3fb AC |
673 | /* note: just in case someone wrote the magic |
674 | character five months ago... */ | |
9e0ea345 WVS |
675 | expect_release = 0; |
676 | ||
0e6fa3fb AC |
677 | /* scan to see whether or not we got the |
678 | magic character */ | |
9e0ea345 WVS |
679 | for (i = 0; i != len; i++) { |
680 | char c; | |
7944d3a5 | 681 | if (get_user(c, data + i)) |
9e0ea345 WVS |
682 | return -EFAULT; |
683 | if (c == 'V') | |
684 | expect_release = 42; | |
685 | } | |
686 | } | |
687 | ||
688 | /* someone wrote to us, we should reload the timer */ | |
689 | iTCO_wdt_keepalive(); | |
690 | } | |
691 | return len; | |
692 | } | |
693 | ||
0e6fa3fb AC |
694 | static long iTCO_wdt_ioctl(struct file *file, unsigned int cmd, |
695 | unsigned long arg) | |
9e0ea345 WVS |
696 | { |
697 | int new_options, retval = -EINVAL; | |
698 | int new_heartbeat; | |
9e0ea345 WVS |
699 | void __user *argp = (void __user *)arg; |
700 | int __user *p = argp; | |
42747d71 | 701 | static const struct watchdog_info ident = { |
9e0ea345 WVS |
702 | .options = WDIOF_SETTIMEOUT | |
703 | WDIOF_KEEPALIVEPING | | |
704 | WDIOF_MAGICCLOSE, | |
705 | .firmware_version = 0, | |
706 | .identity = DRV_NAME, | |
707 | }; | |
708 | ||
709 | switch (cmd) { | |
0e6fa3fb AC |
710 | case WDIOC_GETSUPPORT: |
711 | return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0; | |
712 | case WDIOC_GETSTATUS: | |
713 | case WDIOC_GETBOOTSTATUS: | |
714 | return put_user(0, p); | |
9e0ea345 | 715 | |
0e6fa3fb AC |
716 | case WDIOC_SETOPTIONS: |
717 | { | |
718 | if (get_user(new_options, p)) | |
719 | return -EFAULT; | |
9e0ea345 | 720 | |
0e6fa3fb AC |
721 | if (new_options & WDIOS_DISABLECARD) { |
722 | iTCO_wdt_stop(); | |
723 | retval = 0; | |
9e0ea345 | 724 | } |
0e6fa3fb | 725 | if (new_options & WDIOS_ENABLECARD) { |
9e0ea345 | 726 | iTCO_wdt_keepalive(); |
0e6fa3fb AC |
727 | iTCO_wdt_start(); |
728 | retval = 0; | |
9e0ea345 | 729 | } |
0e6fa3fb AC |
730 | return retval; |
731 | } | |
0c06090c WVS |
732 | case WDIOC_KEEPALIVE: |
733 | iTCO_wdt_keepalive(); | |
734 | return 0; | |
735 | ||
0e6fa3fb AC |
736 | case WDIOC_SETTIMEOUT: |
737 | { | |
738 | if (get_user(new_heartbeat, p)) | |
739 | return -EFAULT; | |
740 | if (iTCO_wdt_set_heartbeat(new_heartbeat)) | |
741 | return -EINVAL; | |
742 | iTCO_wdt_keepalive(); | |
743 | /* Fall */ | |
744 | } | |
745 | case WDIOC_GETTIMEOUT: | |
746 | return put_user(heartbeat, p); | |
747 | case WDIOC_GETTIMELEFT: | |
748 | { | |
749 | int time_left; | |
750 | if (iTCO_wdt_get_timeleft(&time_left)) | |
751 | return -EINVAL; | |
752 | return put_user(time_left, p); | |
753 | } | |
754 | default: | |
755 | return -ENOTTY; | |
9e0ea345 WVS |
756 | } |
757 | } | |
758 | ||
9e0ea345 WVS |
759 | /* |
760 | * Kernel Interfaces | |
761 | */ | |
762 | ||
2b8693c0 | 763 | static const struct file_operations iTCO_wdt_fops = { |
0e6fa3fb AC |
764 | .owner = THIS_MODULE, |
765 | .llseek = no_llseek, | |
766 | .write = iTCO_wdt_write, | |
767 | .unlocked_ioctl = iTCO_wdt_ioctl, | |
768 | .open = iTCO_wdt_open, | |
769 | .release = iTCO_wdt_release, | |
9e0ea345 WVS |
770 | }; |
771 | ||
772 | static struct miscdevice iTCO_wdt_miscdev = { | |
773 | .minor = WATCHDOG_MINOR, | |
774 | .name = "watchdog", | |
775 | .fops = &iTCO_wdt_fops, | |
776 | }; | |
777 | ||
9e0ea345 WVS |
778 | /* |
779 | * Init & exit routines | |
780 | */ | |
781 | ||
0e6fa3fb AC |
782 | static int __devinit iTCO_wdt_init(struct pci_dev *pdev, |
783 | const struct pci_device_id *ent, struct platform_device *dev) | |
9e0ea345 WVS |
784 | { |
785 | int ret; | |
786 | u32 base_address; | |
787 | unsigned long RCBA; | |
12d60e28 | 788 | unsigned long val32; |
9e0ea345 WVS |
789 | |
790 | /* | |
791 | * Find the ACPI/PM base I/O address which is the base | |
792 | * for the TCO registers (TCOBASE=ACPIBASE + 0x60) | |
793 | * ACPIBASE is bits [15:7] from 0x40-0x43 | |
794 | */ | |
795 | pci_read_config_dword(pdev, 0x40, &base_address); | |
0d4804b3 | 796 | base_address &= 0x0000ff80; |
9e0ea345 WVS |
797 | if (base_address == 0x00000000) { |
798 | /* Something's wrong here, ACPIBASE has to be set */ | |
641912f4 PB |
799 | printk(KERN_ERR PFX "failed to get TCOBASE address, " |
800 | "device disabled by hardware/BIOS\n"); | |
9e0ea345 WVS |
801 | return -ENODEV; |
802 | } | |
0e6fa3fb AC |
803 | iTCO_wdt_private.iTCO_version = |
804 | iTCO_chipset_info[ent->driver_data].iTCO_version; | |
9e0ea345 WVS |
805 | iTCO_wdt_private.ACPIBASE = base_address; |
806 | iTCO_wdt_private.pdev = pdev; | |
807 | ||
0e6fa3fb AC |
808 | /* Get the Memory-Mapped GCS register, we need it for the |
809 | NO_REBOOT flag (TCO v2). To get access to it you have to | |
810 | read RCBA from PCI Config space 0xf0 and use it as base. | |
811 | GCS = RCBA + ICH6_GCS(0x3410). */ | |
9e0ea345 WVS |
812 | if (iTCO_wdt_private.iTCO_version == 2) { |
813 | pci_read_config_dword(pdev, 0xf0, &base_address); | |
de8cd9a3 | 814 | if ((base_address & 1) == 0) { |
641912f4 PB |
815 | printk(KERN_ERR PFX "RCBA is disabled by hardware" |
816 | "/BIOS, device disabled\n"); | |
de8cd9a3 DL |
817 | ret = -ENODEV; |
818 | goto out; | |
819 | } | |
9e0ea345 | 820 | RCBA = base_address & 0xffffc000; |
0e6fa3fb | 821 | iTCO_wdt_private.gcs = ioremap((RCBA + 0x3410), 4); |
9e0ea345 WVS |
822 | } |
823 | ||
824 | /* Check chipset's NO_REBOOT bit */ | |
e033351d | 825 | if (iTCO_wdt_unset_NO_REBOOT_bit() && iTCO_vendor_check_noreboot_on()) { |
ec26985b | 826 | printk(KERN_INFO PFX "unable to reset NO_REBOOT flag, " |
641912f4 | 827 | "device disabled by hardware/BIOS\n"); |
9e0ea345 | 828 | ret = -ENODEV; /* Cannot reset NO_REBOOT bit */ |
de8cd9a3 | 829 | goto out_unmap; |
9e0ea345 WVS |
830 | } |
831 | ||
832 | /* Set the NO_REBOOT bit to prevent later reboots, just for sure */ | |
833 | iTCO_wdt_set_NO_REBOOT_bit(); | |
834 | ||
7cd5b08b | 835 | /* The TCO logic uses the TCO_EN bit in the SMI_EN register */ |
9e0ea345 | 836 | if (!request_region(SMI_EN, 4, "iTCO_wdt")) { |
0e6fa3fb | 837 | printk(KERN_ERR PFX |
641912f4 PB |
838 | "I/O address 0x%04lx already in use, " |
839 | "device disabled\n", SMI_EN); | |
9e0ea345 | 840 | ret = -EIO; |
de8cd9a3 | 841 | goto out_unmap; |
9e0ea345 | 842 | } |
12d60e28 WVS |
843 | /* Bit 13: TCO_EN -> 0 = Disables TCO logic generating an SMI# */ |
844 | val32 = inl(SMI_EN); | |
845 | val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */ | |
846 | outl(val32, SMI_EN); | |
9e0ea345 | 847 | |
0e6fa3fb AC |
848 | /* The TCO I/O registers reside in a 32-byte range pointed to |
849 | by the TCOBASE value */ | |
850 | if (!request_region(TCOBASE, 0x20, "iTCO_wdt")) { | |
641912f4 PB |
851 | printk(KERN_ERR PFX "I/O address 0x%04lx already in use " |
852 | "device disabled\n", TCOBASE); | |
9e0ea345 | 853 | ret = -EIO; |
7cd5b08b | 854 | goto unreg_smi_en; |
9e0ea345 WVS |
855 | } |
856 | ||
0e6fa3fb AC |
857 | printk(KERN_INFO PFX |
858 | "Found a %s TCO device (Version=%d, TCOBASE=0x%04lx)\n", | |
859 | iTCO_chipset_info[ent->driver_data].name, | |
860 | iTCO_chipset_info[ent->driver_data].iTCO_version, | |
861 | TCOBASE); | |
9e0ea345 WVS |
862 | |
863 | /* Clear out the (probably old) status */ | |
7e6811da PB |
864 | outw(0x0008, TCO1_STS); /* Clear the Time Out Status bit */ |
865 | outw(0x0002, TCO2_STS); /* Clear SECOND_TO_STS bit */ | |
866 | outw(0x0004, TCO2_STS); /* Clear BOOT_STS bit */ | |
9e0ea345 WVS |
867 | |
868 | /* Make sure the watchdog is not running */ | |
869 | iTCO_wdt_stop(); | |
870 | ||
0e6fa3fb AC |
871 | /* Check that the heartbeat value is within it's range; |
872 | if not reset to the default */ | |
9e0ea345 WVS |
873 | if (iTCO_wdt_set_heartbeat(heartbeat)) { |
874 | iTCO_wdt_set_heartbeat(WATCHDOG_HEARTBEAT); | |
143a2e54 | 875 | printk(KERN_INFO PFX |
7e6811da | 876 | "timeout value out of range, using %d\n", heartbeat); |
9e0ea345 WVS |
877 | } |
878 | ||
9e0ea345 WVS |
879 | ret = misc_register(&iTCO_wdt_miscdev); |
880 | if (ret != 0) { | |
0e6fa3fb AC |
881 | printk(KERN_ERR PFX |
882 | "cannot register miscdev on minor=%d (err=%d)\n", | |
883 | WATCHDOG_MINOR, ret); | |
1bef84be | 884 | goto unreg_region; |
9e0ea345 WVS |
885 | } |
886 | ||
0e6fa3fb AC |
887 | printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n", |
888 | heartbeat, nowayout); | |
9e0ea345 WVS |
889 | |
890 | return 0; | |
891 | ||
9e0ea345 | 892 | unreg_region: |
0e6fa3fb | 893 | release_region(TCOBASE, 0x20); |
7cd5b08b WVS |
894 | unreg_smi_en: |
895 | release_region(SMI_EN, 4); | |
de8cd9a3 | 896 | out_unmap: |
9e0ea345 WVS |
897 | if (iTCO_wdt_private.iTCO_version == 2) |
898 | iounmap(iTCO_wdt_private.gcs); | |
de8cd9a3 | 899 | out: |
1bef84be | 900 | iTCO_wdt_private.ACPIBASE = 0; |
9e0ea345 WVS |
901 | return ret; |
902 | } | |
903 | ||
08113e39 | 904 | static void __devexit iTCO_wdt_cleanup(void) |
9e0ea345 WVS |
905 | { |
906 | /* Stop the timer before we leave */ | |
907 | if (!nowayout) | |
908 | iTCO_wdt_stop(); | |
909 | ||
910 | /* Deregister */ | |
911 | misc_deregister(&iTCO_wdt_miscdev); | |
9e0ea345 | 912 | release_region(TCOBASE, 0x20); |
7cd5b08b | 913 | release_region(SMI_EN, 4); |
9e0ea345 WVS |
914 | if (iTCO_wdt_private.iTCO_version == 2) |
915 | iounmap(iTCO_wdt_private.gcs); | |
4802c653 | 916 | pci_dev_put(iTCO_wdt_private.pdev); |
1bef84be | 917 | iTCO_wdt_private.ACPIBASE = 0; |
9e0ea345 WVS |
918 | } |
919 | ||
08113e39 | 920 | static int __devinit iTCO_wdt_probe(struct platform_device *dev) |
9e0ea345 | 921 | { |
ec26985b | 922 | int ret = -ENODEV; |
9e0ea345 WVS |
923 | int found = 0; |
924 | struct pci_dev *pdev = NULL; | |
925 | const struct pci_device_id *ent; | |
926 | ||
927 | spin_lock_init(&iTCO_wdt_private.io_lock); | |
928 | ||
929 | for_each_pci_dev(pdev) { | |
930 | ent = pci_match_id(iTCO_wdt_pci_tbl, pdev); | |
931 | if (ent) { | |
ec26985b NC |
932 | found++; |
933 | ret = iTCO_wdt_init(pdev, ent, dev); | |
934 | if (!ret) | |
9e0ea345 | 935 | break; |
9e0ea345 WVS |
936 | } |
937 | } | |
938 | ||
ec26985b | 939 | if (!found) |
641912f4 | 940 | printk(KERN_INFO PFX "No device detected.\n"); |
9e0ea345 | 941 | |
ec26985b | 942 | return ret; |
9e0ea345 WVS |
943 | } |
944 | ||
08113e39 | 945 | static int __devexit iTCO_wdt_remove(struct platform_device *dev) |
9e0ea345 WVS |
946 | { |
947 | if (iTCO_wdt_private.ACPIBASE) | |
948 | iTCO_wdt_cleanup(); | |
949 | ||
3836cc0f WVS |
950 | return 0; |
951 | } | |
952 | ||
953 | static void iTCO_wdt_shutdown(struct platform_device *dev) | |
954 | { | |
955 | iTCO_wdt_stop(); | |
956 | } | |
957 | ||
958 | #define iTCO_wdt_suspend NULL | |
959 | #define iTCO_wdt_resume NULL | |
960 | ||
961 | static struct platform_driver iTCO_wdt_driver = { | |
962 | .probe = iTCO_wdt_probe, | |
08113e39 | 963 | .remove = __devexit_p(iTCO_wdt_remove), |
3836cc0f WVS |
964 | .shutdown = iTCO_wdt_shutdown, |
965 | .suspend = iTCO_wdt_suspend, | |
966 | .resume = iTCO_wdt_resume, | |
967 | .driver = { | |
968 | .owner = THIS_MODULE, | |
969 | .name = DRV_NAME, | |
970 | }, | |
971 | }; | |
972 | ||
973 | static int __init iTCO_wdt_init_module(void) | |
974 | { | |
975 | int err; | |
976 | ||
7cd5b08b WVS |
977 | printk(KERN_INFO PFX "Intel TCO WatchDog Timer Driver v%s\n", |
978 | DRV_VERSION); | |
3836cc0f WVS |
979 | |
980 | err = platform_driver_register(&iTCO_wdt_driver); | |
981 | if (err) | |
982 | return err; | |
983 | ||
0e6fa3fb AC |
984 | iTCO_wdt_platform_device = platform_device_register_simple(DRV_NAME, |
985 | -1, NULL, 0); | |
3836cc0f WVS |
986 | if (IS_ERR(iTCO_wdt_platform_device)) { |
987 | err = PTR_ERR(iTCO_wdt_platform_device); | |
988 | goto unreg_platform_driver; | |
989 | } | |
990 | ||
991 | return 0; | |
992 | ||
993 | unreg_platform_driver: | |
994 | platform_driver_unregister(&iTCO_wdt_driver); | |
995 | return err; | |
996 | } | |
997 | ||
998 | static void __exit iTCO_wdt_cleanup_module(void) | |
999 | { | |
1000 | platform_device_unregister(iTCO_wdt_platform_device); | |
1001 | platform_driver_unregister(&iTCO_wdt_driver); | |
9e0ea345 WVS |
1002 | printk(KERN_INFO PFX "Watchdog Module Unloaded.\n"); |
1003 | } | |
1004 | ||
1005 | module_init(iTCO_wdt_init_module); | |
1006 | module_exit(iTCO_wdt_cleanup_module); | |
1007 | ||
1008 | MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>"); | |
1009 | MODULE_DESCRIPTION("Intel TCO WatchDog Timer Driver"); | |
3836cc0f | 1010 | MODULE_VERSION(DRV_VERSION); |
9e0ea345 WVS |
1011 | MODULE_LICENSE("GPL"); |
1012 | MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); |