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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * i8k.c -- Linux driver for accessing the SMM BIOS on Dell laptops. | |
3 | * See http://www.debian.org/~dz/i8k/ for more information | |
4 | * and for latest version of this driver. | |
5 | * | |
6 | * Copyright (C) 2001 Massimo Dal Zotto <dz@debian.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2, or (at your option) any | |
11 | * later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/types.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/proc_fs.h> | |
352f8f8b | 23 | #include <linux/seq_file.h> |
e70c9d5e | 24 | #include <linux/dmi.h> |
7e80d0d0 | 25 | #include <linux/capability.h> |
613655fa | 26 | #include <linux/mutex.h> |
1da177e4 LT |
27 | #include <asm/uaccess.h> |
28 | #include <asm/io.h> | |
29 | ||
30 | #include <linux/i8k.h> | |
31 | ||
352f8f8b | 32 | #define I8K_VERSION "1.14 21/02/2005" |
1da177e4 LT |
33 | |
34 | #define I8K_SMM_FN_STATUS 0x0025 | |
35 | #define I8K_SMM_POWER_STATUS 0x0069 | |
36 | #define I8K_SMM_SET_FAN 0x01a3 | |
37 | #define I8K_SMM_GET_FAN 0x00a3 | |
38 | #define I8K_SMM_GET_SPEED 0x02a3 | |
39 | #define I8K_SMM_GET_TEMP 0x10a3 | |
7e0fa31d DT |
40 | #define I8K_SMM_GET_DELL_SIG1 0xfea3 |
41 | #define I8K_SMM_GET_DELL_SIG2 0xffa3 | |
1da177e4 LT |
42 | #define I8K_SMM_BIOS_VERSION 0x00a6 |
43 | ||
44 | #define I8K_FAN_MULT 30 | |
45 | #define I8K_MAX_TEMP 127 | |
46 | ||
47 | #define I8K_FN_NONE 0x00 | |
48 | #define I8K_FN_UP 0x01 | |
49 | #define I8K_FN_DOWN 0x02 | |
50 | #define I8K_FN_MUTE 0x04 | |
51 | #define I8K_FN_MASK 0x07 | |
52 | #define I8K_FN_SHIFT 8 | |
53 | ||
54 | #define I8K_POWER_AC 0x05 | |
55 | #define I8K_POWER_BATTERY 0x01 | |
56 | ||
57 | #define I8K_TEMPERATURE_BUG 1 | |
58 | ||
613655fa | 59 | static DEFINE_MUTEX(i8k_mutex); |
e70c9d5e | 60 | static char bios_version[4]; |
1da177e4 LT |
61 | |
62 | MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); | |
63 | MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops"); | |
64 | MODULE_LICENSE("GPL"); | |
65 | ||
66 | static int force; | |
67 | module_param(force, bool, 0); | |
68 | MODULE_PARM_DESC(force, "Force loading without checking for supported models"); | |
69 | ||
e70c9d5e DT |
70 | static int ignore_dmi; |
71 | module_param(ignore_dmi, bool, 0); | |
72 | MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); | |
73 | ||
1da177e4 LT |
74 | static int restricted; |
75 | module_param(restricted, bool, 0); | |
76 | MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set"); | |
77 | ||
78 | static int power_status; | |
79 | module_param(power_status, bool, 0600); | |
80 | MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k"); | |
81 | ||
4ed99a27 JE |
82 | static int fan_mult = I8K_FAN_MULT; |
83 | module_param(fan_mult, int, 0); | |
84 | MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with"); | |
85 | ||
352f8f8b | 86 | static int i8k_open_fs(struct inode *inode, struct file *file); |
d79b6f4d | 87 | static long i8k_ioctl(struct file *, unsigned int, unsigned long); |
1da177e4 | 88 | |
62322d25 | 89 | static const struct file_operations i8k_fops = { |
1b502217 | 90 | .owner = THIS_MODULE, |
352f8f8b DT |
91 | .open = i8k_open_fs, |
92 | .read = seq_read, | |
93 | .llseek = seq_lseek, | |
94 | .release = single_release, | |
d79b6f4d | 95 | .unlocked_ioctl = i8k_ioctl, |
1da177e4 LT |
96 | }; |
97 | ||
8378b924 | 98 | struct smm_regs { |
dec63ec3 DT |
99 | unsigned int eax; |
100 | unsigned int ebx __attribute__ ((packed)); | |
101 | unsigned int ecx __attribute__ ((packed)); | |
102 | unsigned int edx __attribute__ ((packed)); | |
103 | unsigned int esi __attribute__ ((packed)); | |
104 | unsigned int edi __attribute__ ((packed)); | |
8378b924 | 105 | }; |
1da177e4 | 106 | |
1855256c | 107 | static inline const char *i8k_get_dmi_data(int field) |
e70c9d5e | 108 | { |
1855256c | 109 | const char *dmi_data = dmi_get_system_info(field); |
4f005551 DT |
110 | |
111 | return dmi_data && *dmi_data ? dmi_data : "?"; | |
e70c9d5e | 112 | } |
1da177e4 LT |
113 | |
114 | /* | |
115 | * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. | |
116 | */ | |
8378b924 | 117 | static int i8k_smm(struct smm_regs *regs) |
1da177e4 | 118 | { |
dec63ec3 DT |
119 | int rc; |
120 | int eax = regs->eax; | |
121 | ||
fe04f22f | 122 | #if defined(CONFIG_X86_64) |
22d3243d | 123 | asm volatile("pushq %%rax\n\t" |
fe04f22f BS |
124 | "movl 0(%%rax),%%edx\n\t" |
125 | "pushq %%rdx\n\t" | |
126 | "movl 4(%%rax),%%ebx\n\t" | |
127 | "movl 8(%%rax),%%ecx\n\t" | |
128 | "movl 12(%%rax),%%edx\n\t" | |
129 | "movl 16(%%rax),%%esi\n\t" | |
130 | "movl 20(%%rax),%%edi\n\t" | |
131 | "popq %%rax\n\t" | |
132 | "out %%al,$0xb2\n\t" | |
133 | "out %%al,$0x84\n\t" | |
134 | "xchgq %%rax,(%%rsp)\n\t" | |
135 | "movl %%ebx,4(%%rax)\n\t" | |
136 | "movl %%ecx,8(%%rax)\n\t" | |
137 | "movl %%edx,12(%%rax)\n\t" | |
138 | "movl %%esi,16(%%rax)\n\t" | |
139 | "movl %%edi,20(%%rax)\n\t" | |
140 | "popq %%rdx\n\t" | |
141 | "movl %%edx,0(%%rax)\n\t" | |
142 | "lahf\n\t" | |
143 | "shrl $8,%%eax\n\t" | |
144 | "andl $1,%%eax\n" | |
22d3243d | 145 | :"=a"(rc) |
fe04f22f BS |
146 | : "a"(regs) |
147 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
148 | #else | |
22d3243d | 149 | asm volatile("pushl %%eax\n\t" |
dec63ec3 DT |
150 | "movl 0(%%eax),%%edx\n\t" |
151 | "push %%edx\n\t" | |
152 | "movl 4(%%eax),%%ebx\n\t" | |
153 | "movl 8(%%eax),%%ecx\n\t" | |
154 | "movl 12(%%eax),%%edx\n\t" | |
155 | "movl 16(%%eax),%%esi\n\t" | |
156 | "movl 20(%%eax),%%edi\n\t" | |
157 | "popl %%eax\n\t" | |
158 | "out %%al,$0xb2\n\t" | |
159 | "out %%al,$0x84\n\t" | |
160 | "xchgl %%eax,(%%esp)\n\t" | |
161 | "movl %%ebx,4(%%eax)\n\t" | |
162 | "movl %%ecx,8(%%eax)\n\t" | |
163 | "movl %%edx,12(%%eax)\n\t" | |
164 | "movl %%esi,16(%%eax)\n\t" | |
165 | "movl %%edi,20(%%eax)\n\t" | |
166 | "popl %%edx\n\t" | |
167 | "movl %%edx,0(%%eax)\n\t" | |
168 | "lahf\n\t" | |
169 | "shrl $8,%%eax\n\t" | |
6b4e81db | 170 | "andl $1,%%eax\n" |
22d3243d | 171 | :"=a"(rc) |
dec63ec3 DT |
172 | : "a"(regs) |
173 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
fe04f22f | 174 | #endif |
8378b924 | 175 | if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
dec63ec3 | 176 | return -EINVAL; |
dec63ec3 DT |
177 | |
178 | return 0; | |
1da177e4 LT |
179 | } |
180 | ||
181 | /* | |
182 | * Read the bios version. Return the version as an integer corresponding | |
183 | * to the ascii value, for example "A17" is returned as 0x00413137. | |
184 | */ | |
185 | static int i8k_get_bios_version(void) | |
186 | { | |
8378b924 | 187 | struct smm_regs regs = { .eax = I8K_SMM_BIOS_VERSION, }; |
1da177e4 | 188 | |
8378b924 | 189 | return i8k_smm(®s) ? : regs.eax; |
1da177e4 LT |
190 | } |
191 | ||
1da177e4 LT |
192 | /* |
193 | * Read the Fn key status. | |
194 | */ | |
195 | static int i8k_get_fn_status(void) | |
196 | { | |
8378b924 | 197 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; |
dec63ec3 DT |
198 | int rc; |
199 | ||
8378b924 | 200 | if ((rc = i8k_smm(®s)) < 0) |
dec63ec3 | 201 | return rc; |
dec63ec3 DT |
202 | |
203 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { | |
204 | case I8K_FN_UP: | |
205 | return I8K_VOL_UP; | |
206 | case I8K_FN_DOWN: | |
207 | return I8K_VOL_DOWN; | |
208 | case I8K_FN_MUTE: | |
209 | return I8K_VOL_MUTE; | |
210 | default: | |
211 | return 0; | |
212 | } | |
1da177e4 LT |
213 | } |
214 | ||
215 | /* | |
216 | * Read the power status. | |
217 | */ | |
218 | static int i8k_get_power_status(void) | |
219 | { | |
8378b924 | 220 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; |
dec63ec3 DT |
221 | int rc; |
222 | ||
8378b924 | 223 | if ((rc = i8k_smm(®s)) < 0) |
dec63ec3 | 224 | return rc; |
dec63ec3 | 225 | |
8378b924 | 226 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; |
1da177e4 LT |
227 | } |
228 | ||
229 | /* | |
230 | * Read the fan status. | |
231 | */ | |
232 | static int i8k_get_fan_status(int fan) | |
233 | { | |
8378b924 | 234 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
1da177e4 | 235 | |
dec63ec3 | 236 | regs.ebx = fan & 0xff; |
8378b924 | 237 | return i8k_smm(®s) ? : regs.eax & 0xff; |
1da177e4 LT |
238 | } |
239 | ||
240 | /* | |
241 | * Read the fan speed in RPM. | |
242 | */ | |
243 | static int i8k_get_fan_speed(int fan) | |
244 | { | |
8378b924 | 245 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
1da177e4 | 246 | |
dec63ec3 | 247 | regs.ebx = fan & 0xff; |
4ed99a27 | 248 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * fan_mult; |
1da177e4 LT |
249 | } |
250 | ||
251 | /* | |
252 | * Set the fan speed (off, low, high). Returns the new fan status. | |
253 | */ | |
254 | static int i8k_set_fan(int fan, int speed) | |
255 | { | |
8378b924 | 256 | struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
1da177e4 | 257 | |
dec63ec3 | 258 | speed = (speed < 0) ? 0 : ((speed > I8K_FAN_MAX) ? I8K_FAN_MAX : speed); |
dec63ec3 | 259 | regs.ebx = (fan & 0xff) | (speed << 8); |
1da177e4 | 260 | |
8378b924 | 261 | return i8k_smm(®s) ? : i8k_get_fan_status(fan); |
1da177e4 LT |
262 | } |
263 | ||
264 | /* | |
265 | * Read the cpu temperature. | |
266 | */ | |
7e0fa31d | 267 | static int i8k_get_temp(int sensor) |
1da177e4 | 268 | { |
8378b924 | 269 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP, }; |
dec63ec3 DT |
270 | int rc; |
271 | int temp; | |
1da177e4 LT |
272 | |
273 | #ifdef I8K_TEMPERATURE_BUG | |
8378b924 | 274 | static int prev; |
1da177e4 | 275 | #endif |
7e0fa31d | 276 | regs.ebx = sensor & 0xff; |
8378b924 | 277 | if ((rc = i8k_smm(®s)) < 0) |
dec63ec3 | 278 | return rc; |
8378b924 | 279 | |
dec63ec3 | 280 | temp = regs.eax & 0xff; |
1da177e4 LT |
281 | |
282 | #ifdef I8K_TEMPERATURE_BUG | |
dec63ec3 DT |
283 | /* |
284 | * Sometimes the temperature sensor returns 0x99, which is out of range. | |
285 | * In this case we return (once) the previous cached value. For example: | |
286 | # 1003655137 00000058 00005a4b | |
287 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees | |
288 | # 1003655139 00000054 00005c52 | |
289 | */ | |
290 | if (temp > I8K_MAX_TEMP) { | |
291 | temp = prev; | |
292 | prev = I8K_MAX_TEMP; | |
293 | } else { | |
294 | prev = temp; | |
295 | } | |
1da177e4 LT |
296 | #endif |
297 | ||
dec63ec3 | 298 | return temp; |
1da177e4 LT |
299 | } |
300 | ||
7e0fa31d | 301 | static int i8k_get_dell_signature(int req_fn) |
1da177e4 | 302 | { |
7e0fa31d | 303 | struct smm_regs regs = { .eax = req_fn, }; |
dec63ec3 | 304 | int rc; |
1da177e4 | 305 | |
8378b924 | 306 | if ((rc = i8k_smm(®s)) < 0) |
dec63ec3 | 307 | return rc; |
1da177e4 | 308 | |
8378b924 | 309 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
1da177e4 LT |
310 | } |
311 | ||
d79b6f4d FW |
312 | static int |
313 | i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 314 | { |
e70c9d5e | 315 | int val = 0; |
dec63ec3 DT |
316 | int speed; |
317 | unsigned char buff[16]; | |
318 | int __user *argp = (int __user *)arg; | |
319 | ||
320 | if (!argp) | |
321 | return -EINVAL; | |
322 | ||
323 | switch (cmd) { | |
324 | case I8K_BIOS_VERSION: | |
325 | val = i8k_get_bios_version(); | |
326 | break; | |
327 | ||
328 | case I8K_MACHINE_ID: | |
329 | memset(buff, 0, 16); | |
e70c9d5e | 330 | strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), sizeof(buff)); |
dec63ec3 DT |
331 | break; |
332 | ||
333 | case I8K_FN_STATUS: | |
334 | val = i8k_get_fn_status(); | |
335 | break; | |
336 | ||
337 | case I8K_POWER_STATUS: | |
338 | val = i8k_get_power_status(); | |
339 | break; | |
340 | ||
341 | case I8K_GET_TEMP: | |
7e0fa31d | 342 | val = i8k_get_temp(0); |
dec63ec3 DT |
343 | break; |
344 | ||
345 | case I8K_GET_SPEED: | |
8378b924 | 346 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 347 | return -EFAULT; |
8378b924 | 348 | |
dec63ec3 DT |
349 | val = i8k_get_fan_speed(val); |
350 | break; | |
1da177e4 | 351 | |
dec63ec3 | 352 | case I8K_GET_FAN: |
8378b924 | 353 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 354 | return -EFAULT; |
8378b924 | 355 | |
dec63ec3 DT |
356 | val = i8k_get_fan_status(val); |
357 | break; | |
1da177e4 | 358 | |
dec63ec3 | 359 | case I8K_SET_FAN: |
8378b924 | 360 | if (restricted && !capable(CAP_SYS_ADMIN)) |
dec63ec3 | 361 | return -EPERM; |
8378b924 DT |
362 | |
363 | if (copy_from_user(&val, argp, sizeof(int))) | |
dec63ec3 | 364 | return -EFAULT; |
8378b924 DT |
365 | |
366 | if (copy_from_user(&speed, argp + 1, sizeof(int))) | |
dec63ec3 | 367 | return -EFAULT; |
8378b924 | 368 | |
dec63ec3 DT |
369 | val = i8k_set_fan(val, speed); |
370 | break; | |
1da177e4 | 371 | |
dec63ec3 DT |
372 | default: |
373 | return -EINVAL; | |
1da177e4 | 374 | } |
1da177e4 | 375 | |
8378b924 | 376 | if (val < 0) |
dec63ec3 | 377 | return val; |
1da177e4 | 378 | |
dec63ec3 DT |
379 | switch (cmd) { |
380 | case I8K_BIOS_VERSION: | |
8378b924 | 381 | if (copy_to_user(argp, &val, 4)) |
dec63ec3 | 382 | return -EFAULT; |
8378b924 | 383 | |
dec63ec3 DT |
384 | break; |
385 | case I8K_MACHINE_ID: | |
8378b924 | 386 | if (copy_to_user(argp, buff, 16)) |
dec63ec3 | 387 | return -EFAULT; |
8378b924 | 388 | |
dec63ec3 DT |
389 | break; |
390 | default: | |
8378b924 | 391 | if (copy_to_user(argp, &val, sizeof(int))) |
dec63ec3 | 392 | return -EFAULT; |
8378b924 | 393 | |
dec63ec3 | 394 | break; |
1da177e4 | 395 | } |
1da177e4 | 396 | |
dec63ec3 | 397 | return 0; |
1da177e4 LT |
398 | } |
399 | ||
d79b6f4d FW |
400 | static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
401 | { | |
402 | long ret; | |
403 | ||
613655fa | 404 | mutex_lock(&i8k_mutex); |
d79b6f4d | 405 | ret = i8k_ioctl_unlocked(fp, cmd, arg); |
613655fa | 406 | mutex_unlock(&i8k_mutex); |
d79b6f4d FW |
407 | |
408 | return ret; | |
409 | } | |
410 | ||
1da177e4 LT |
411 | /* |
412 | * Print the information for /proc/i8k. | |
413 | */ | |
352f8f8b | 414 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
1da177e4 | 415 | { |
352f8f8b | 416 | int fn_key, cpu_temp, ac_power; |
dec63ec3 DT |
417 | int left_fan, right_fan, left_speed, right_speed; |
418 | ||
96de0e25 JE |
419 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
420 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ | |
421 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ | |
422 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ | |
423 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ | |
424 | fn_key = i8k_get_fn_status(); /* 750 µs */ | |
8378b924 | 425 | if (power_status) |
96de0e25 | 426 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
8378b924 | 427 | else |
dec63ec3 | 428 | ac_power = -1; |
dec63ec3 DT |
429 | |
430 | /* | |
431 | * Info: | |
432 | * | |
433 | * 1) Format version (this will change if format changes) | |
434 | * 2) BIOS version | |
435 | * 3) BIOS machine ID | |
436 | * 4) Cpu temperature | |
437 | * 5) Left fan status | |
438 | * 6) Right fan status | |
439 | * 7) Left fan speed | |
440 | * 8) Right fan speed | |
441 | * 9) AC power | |
442 | * 10) Fn Key status | |
443 | */ | |
352f8f8b DT |
444 | return seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
445 | I8K_PROC_FMT, | |
446 | bios_version, | |
4f005551 | 447 | i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
352f8f8b DT |
448 | cpu_temp, |
449 | left_fan, right_fan, left_speed, right_speed, | |
450 | ac_power, fn_key); | |
1da177e4 LT |
451 | } |
452 | ||
352f8f8b | 453 | static int i8k_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 454 | { |
352f8f8b | 455 | return single_open(file, i8k_proc_show, NULL); |
1da177e4 LT |
456 | } |
457 | ||
e70c9d5e DT |
458 | static struct dmi_system_id __initdata i8k_dmi_table[] = { |
459 | { | |
460 | .ident = "Dell Inspiron", | |
461 | .matches = { | |
462 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
463 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
464 | }, | |
465 | }, | |
466 | { | |
467 | .ident = "Dell Latitude", | |
468 | .matches = { | |
469 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
470 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
471 | }, | |
472 | }, | |
7e0fa31d DT |
473 | { |
474 | .ident = "Dell Inspiron 2", | |
475 | .matches = { | |
476 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
477 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
478 | }, | |
479 | }, | |
480 | { | |
481 | .ident = "Dell Latitude 2", | |
482 | .matches = { | |
483 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
484 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
485 | }, | |
486 | }, | |
a9000d03 NW |
487 | { /* UK Inspiron 6400 */ |
488 | .ident = "Dell Inspiron 3", | |
489 | .matches = { | |
490 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
491 | DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), | |
492 | }, | |
493 | }, | |
48103c52 FS |
494 | { |
495 | .ident = "Dell Inspiron 3", | |
496 | .matches = { | |
497 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
498 | DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), | |
499 | }, | |
500 | }, | |
7ab21a86 AS |
501 | { |
502 | .ident = "Dell Precision", | |
503 | .matches = { | |
504 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
505 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), | |
506 | }, | |
507 | }, | |
bef2a508 FH |
508 | { |
509 | .ident = "Dell Vostro", | |
510 | .matches = { | |
511 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
512 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), | |
513 | }, | |
514 | }, | |
515 | { } | |
e70c9d5e | 516 | }; |
1da177e4 LT |
517 | |
518 | /* | |
519 | * Probe for the presence of a supported laptop. | |
520 | */ | |
521 | static int __init i8k_probe(void) | |
522 | { | |
dec63ec3 DT |
523 | char buff[4]; |
524 | int version; | |
dec63ec3 | 525 | |
1da177e4 | 526 | /* |
dec63ec3 | 527 | * Get DMI information |
1da177e4 | 528 | */ |
e70c9d5e DT |
529 | if (!dmi_check_system(i8k_dmi_table)) { |
530 | if (!ignore_dmi && !force) | |
531 | return -ENODEV; | |
532 | ||
533 | printk(KERN_INFO "i8k: not running on a supported Dell system.\n"); | |
dec63ec3 | 534 | printk(KERN_INFO "i8k: vendor=%s, model=%s, version=%s\n", |
e70c9d5e DT |
535 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
536 | i8k_get_dmi_data(DMI_PRODUCT_NAME), | |
537 | i8k_get_dmi_data(DMI_BIOS_VERSION)); | |
1da177e4 | 538 | } |
dec63ec3 | 539 | |
e70c9d5e DT |
540 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), sizeof(bios_version)); |
541 | ||
1da177e4 | 542 | /* |
dec63ec3 | 543 | * Get SMM Dell signature |
1da177e4 | 544 | */ |
7e0fa31d DT |
545 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
546 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { | |
e70c9d5e DT |
547 | printk(KERN_ERR "i8k: unable to get SMM Dell signature\n"); |
548 | if (!force) | |
549 | return -ENODEV; | |
1da177e4 | 550 | } |
1da177e4 | 551 | |
dec63ec3 DT |
552 | /* |
553 | * Get SMM BIOS version. | |
554 | */ | |
555 | version = i8k_get_bios_version(); | |
556 | if (version <= 0) { | |
e70c9d5e | 557 | printk(KERN_WARNING "i8k: unable to get SMM BIOS version\n"); |
dec63ec3 | 558 | } else { |
dec63ec3 DT |
559 | buff[0] = (version >> 16) & 0xff; |
560 | buff[1] = (version >> 8) & 0xff; | |
561 | buff[2] = (version) & 0xff; | |
562 | buff[3] = '\0'; | |
563 | /* | |
564 | * If DMI BIOS version is unknown use SMM BIOS version. | |
565 | */ | |
e70c9d5e DT |
566 | if (!dmi_get_system_info(DMI_BIOS_VERSION)) |
567 | strlcpy(bios_version, buff, sizeof(bios_version)); | |
568 | ||
dec63ec3 DT |
569 | /* |
570 | * Check if the two versions match. | |
571 | */ | |
e70c9d5e DT |
572 | if (strncmp(buff, bios_version, sizeof(bios_version)) != 0) |
573 | printk(KERN_WARNING "i8k: BIOS version mismatch: %s != %s\n", | |
574 | buff, bios_version); | |
dec63ec3 | 575 | } |
1da177e4 | 576 | |
dec63ec3 | 577 | return 0; |
1da177e4 LT |
578 | } |
579 | ||
8378b924 | 580 | static int __init i8k_init(void) |
1da177e4 | 581 | { |
dec63ec3 DT |
582 | struct proc_dir_entry *proc_i8k; |
583 | ||
584 | /* Are we running on an supported laptop? */ | |
e70c9d5e | 585 | if (i8k_probe()) |
dec63ec3 | 586 | return -ENODEV; |
dec63ec3 DT |
587 | |
588 | /* Register the proc entry */ | |
1b502217 | 589 | proc_i8k = proc_create("i8k", 0, NULL, &i8k_fops); |
352f8f8b | 590 | if (!proc_i8k) |
dec63ec3 | 591 | return -ENOENT; |
352f8f8b | 592 | |
dec63ec3 DT |
593 | printk(KERN_INFO |
594 | "Dell laptop SMM driver v%s Massimo Dal Zotto (dz@debian.org)\n", | |
595 | I8K_VERSION); | |
596 | ||
597 | return 0; | |
1da177e4 LT |
598 | } |
599 | ||
8378b924 | 600 | static void __exit i8k_exit(void) |
1da177e4 | 601 | { |
dec63ec3 | 602 | remove_proc_entry("i8k", NULL); |
1da177e4 | 603 | } |
1da177e4 | 604 | |
8378b924 DT |
605 | module_init(i8k_init); |
606 | module_exit(i8k_exit); |