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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 | * | |
949a9d70 JD |
8 | * Hwmon integration: |
9 | * Copyright (C) 2011 Jean Delvare <khali@linux-fr.org> | |
10 | * | |
1da177e4 LT |
11 | * This program is free software; you can redistribute it and/or modify it |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2, or (at your option) any | |
14 | * later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
20 | */ | |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/types.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/proc_fs.h> | |
352f8f8b | 26 | #include <linux/seq_file.h> |
e70c9d5e | 27 | #include <linux/dmi.h> |
7e80d0d0 | 28 | #include <linux/capability.h> |
613655fa | 29 | #include <linux/mutex.h> |
949a9d70 JD |
30 | #include <linux/hwmon.h> |
31 | #include <linux/hwmon-sysfs.h> | |
1da177e4 LT |
32 | #include <asm/uaccess.h> |
33 | #include <asm/io.h> | |
34 | ||
35 | #include <linux/i8k.h> | |
36 | ||
352f8f8b | 37 | #define I8K_VERSION "1.14 21/02/2005" |
1da177e4 LT |
38 | |
39 | #define I8K_SMM_FN_STATUS 0x0025 | |
40 | #define I8K_SMM_POWER_STATUS 0x0069 | |
41 | #define I8K_SMM_SET_FAN 0x01a3 | |
42 | #define I8K_SMM_GET_FAN 0x00a3 | |
43 | #define I8K_SMM_GET_SPEED 0x02a3 | |
44 | #define I8K_SMM_GET_TEMP 0x10a3 | |
7e0fa31d DT |
45 | #define I8K_SMM_GET_DELL_SIG1 0xfea3 |
46 | #define I8K_SMM_GET_DELL_SIG2 0xffa3 | |
1da177e4 LT |
47 | #define I8K_SMM_BIOS_VERSION 0x00a6 |
48 | ||
49 | #define I8K_FAN_MULT 30 | |
50 | #define I8K_MAX_TEMP 127 | |
51 | ||
52 | #define I8K_FN_NONE 0x00 | |
53 | #define I8K_FN_UP 0x01 | |
54 | #define I8K_FN_DOWN 0x02 | |
55 | #define I8K_FN_MUTE 0x04 | |
56 | #define I8K_FN_MASK 0x07 | |
57 | #define I8K_FN_SHIFT 8 | |
58 | ||
59 | #define I8K_POWER_AC 0x05 | |
60 | #define I8K_POWER_BATTERY 0x01 | |
61 | ||
62 | #define I8K_TEMPERATURE_BUG 1 | |
63 | ||
613655fa | 64 | static DEFINE_MUTEX(i8k_mutex); |
e70c9d5e | 65 | static char bios_version[4]; |
949a9d70 | 66 | static struct device *i8k_hwmon_dev; |
1da177e4 LT |
67 | |
68 | MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); | |
69 | MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops"); | |
70 | MODULE_LICENSE("GPL"); | |
71 | ||
90ab5ee9 | 72 | static bool force; |
1da177e4 LT |
73 | module_param(force, bool, 0); |
74 | MODULE_PARM_DESC(force, "Force loading without checking for supported models"); | |
75 | ||
90ab5ee9 | 76 | static bool ignore_dmi; |
e70c9d5e DT |
77 | module_param(ignore_dmi, bool, 0); |
78 | MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); | |
79 | ||
90ab5ee9 | 80 | static bool restricted; |
1da177e4 LT |
81 | module_param(restricted, bool, 0); |
82 | MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set"); | |
83 | ||
90ab5ee9 | 84 | static bool power_status; |
1da177e4 LT |
85 | module_param(power_status, bool, 0600); |
86 | MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k"); | |
87 | ||
4ed99a27 JE |
88 | static int fan_mult = I8K_FAN_MULT; |
89 | module_param(fan_mult, int, 0); | |
90 | MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with"); | |
91 | ||
352f8f8b | 92 | static int i8k_open_fs(struct inode *inode, struct file *file); |
d79b6f4d | 93 | static long i8k_ioctl(struct file *, unsigned int, unsigned long); |
1da177e4 | 94 | |
62322d25 | 95 | static const struct file_operations i8k_fops = { |
1b502217 | 96 | .owner = THIS_MODULE, |
352f8f8b DT |
97 | .open = i8k_open_fs, |
98 | .read = seq_read, | |
99 | .llseek = seq_lseek, | |
100 | .release = single_release, | |
d79b6f4d | 101 | .unlocked_ioctl = i8k_ioctl, |
1da177e4 LT |
102 | }; |
103 | ||
8378b924 | 104 | struct smm_regs { |
dec63ec3 DT |
105 | unsigned int eax; |
106 | unsigned int ebx __attribute__ ((packed)); | |
107 | unsigned int ecx __attribute__ ((packed)); | |
108 | unsigned int edx __attribute__ ((packed)); | |
109 | unsigned int esi __attribute__ ((packed)); | |
110 | unsigned int edi __attribute__ ((packed)); | |
8378b924 | 111 | }; |
1da177e4 | 112 | |
1855256c | 113 | static inline const char *i8k_get_dmi_data(int field) |
e70c9d5e | 114 | { |
1855256c | 115 | const char *dmi_data = dmi_get_system_info(field); |
4f005551 DT |
116 | |
117 | return dmi_data && *dmi_data ? dmi_data : "?"; | |
e70c9d5e | 118 | } |
1da177e4 LT |
119 | |
120 | /* | |
121 | * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. | |
122 | */ | |
8378b924 | 123 | static int i8k_smm(struct smm_regs *regs) |
1da177e4 | 124 | { |
dec63ec3 DT |
125 | int rc; |
126 | int eax = regs->eax; | |
127 | ||
fe04f22f | 128 | #if defined(CONFIG_X86_64) |
22d3243d | 129 | asm volatile("pushq %%rax\n\t" |
fe04f22f BS |
130 | "movl 0(%%rax),%%edx\n\t" |
131 | "pushq %%rdx\n\t" | |
132 | "movl 4(%%rax),%%ebx\n\t" | |
133 | "movl 8(%%rax),%%ecx\n\t" | |
134 | "movl 12(%%rax),%%edx\n\t" | |
135 | "movl 16(%%rax),%%esi\n\t" | |
136 | "movl 20(%%rax),%%edi\n\t" | |
137 | "popq %%rax\n\t" | |
138 | "out %%al,$0xb2\n\t" | |
139 | "out %%al,$0x84\n\t" | |
140 | "xchgq %%rax,(%%rsp)\n\t" | |
141 | "movl %%ebx,4(%%rax)\n\t" | |
142 | "movl %%ecx,8(%%rax)\n\t" | |
143 | "movl %%edx,12(%%rax)\n\t" | |
144 | "movl %%esi,16(%%rax)\n\t" | |
145 | "movl %%edi,20(%%rax)\n\t" | |
146 | "popq %%rdx\n\t" | |
147 | "movl %%edx,0(%%rax)\n\t" | |
bc1f419c LT |
148 | "pushfq\n\t" |
149 | "popq %%rax\n\t" | |
fe04f22f | 150 | "andl $1,%%eax\n" |
22d3243d | 151 | :"=a"(rc) |
fe04f22f BS |
152 | : "a"(regs) |
153 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
154 | #else | |
22d3243d | 155 | asm volatile("pushl %%eax\n\t" |
dec63ec3 DT |
156 | "movl 0(%%eax),%%edx\n\t" |
157 | "push %%edx\n\t" | |
158 | "movl 4(%%eax),%%ebx\n\t" | |
159 | "movl 8(%%eax),%%ecx\n\t" | |
160 | "movl 12(%%eax),%%edx\n\t" | |
161 | "movl 16(%%eax),%%esi\n\t" | |
162 | "movl 20(%%eax),%%edi\n\t" | |
163 | "popl %%eax\n\t" | |
164 | "out %%al,$0xb2\n\t" | |
165 | "out %%al,$0x84\n\t" | |
166 | "xchgl %%eax,(%%esp)\n\t" | |
167 | "movl %%ebx,4(%%eax)\n\t" | |
168 | "movl %%ecx,8(%%eax)\n\t" | |
169 | "movl %%edx,12(%%eax)\n\t" | |
170 | "movl %%esi,16(%%eax)\n\t" | |
171 | "movl %%edi,20(%%eax)\n\t" | |
172 | "popl %%edx\n\t" | |
173 | "movl %%edx,0(%%eax)\n\t" | |
174 | "lahf\n\t" | |
175 | "shrl $8,%%eax\n\t" | |
6b4e81db | 176 | "andl $1,%%eax\n" |
22d3243d | 177 | :"=a"(rc) |
dec63ec3 DT |
178 | : "a"(regs) |
179 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
fe04f22f | 180 | #endif |
8378b924 | 181 | if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
dec63ec3 | 182 | return -EINVAL; |
dec63ec3 DT |
183 | |
184 | return 0; | |
1da177e4 LT |
185 | } |
186 | ||
187 | /* | |
188 | * Read the bios version. Return the version as an integer corresponding | |
189 | * to the ascii value, for example "A17" is returned as 0x00413137. | |
190 | */ | |
191 | static int i8k_get_bios_version(void) | |
192 | { | |
8378b924 | 193 | struct smm_regs regs = { .eax = I8K_SMM_BIOS_VERSION, }; |
1da177e4 | 194 | |
8378b924 | 195 | return i8k_smm(®s) ? : regs.eax; |
1da177e4 LT |
196 | } |
197 | ||
1da177e4 LT |
198 | /* |
199 | * Read the Fn key status. | |
200 | */ | |
201 | static int i8k_get_fn_status(void) | |
202 | { | |
8378b924 | 203 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; |
dec63ec3 DT |
204 | int rc; |
205 | ||
8378b924 | 206 | if ((rc = i8k_smm(®s)) < 0) |
dec63ec3 | 207 | return rc; |
dec63ec3 DT |
208 | |
209 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { | |
210 | case I8K_FN_UP: | |
211 | return I8K_VOL_UP; | |
212 | case I8K_FN_DOWN: | |
213 | return I8K_VOL_DOWN; | |
214 | case I8K_FN_MUTE: | |
215 | return I8K_VOL_MUTE; | |
216 | default: | |
217 | return 0; | |
218 | } | |
1da177e4 LT |
219 | } |
220 | ||
221 | /* | |
222 | * Read the power status. | |
223 | */ | |
224 | static int i8k_get_power_status(void) | |
225 | { | |
8378b924 | 226 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; |
dec63ec3 DT |
227 | int rc; |
228 | ||
8378b924 | 229 | if ((rc = i8k_smm(®s)) < 0) |
dec63ec3 | 230 | return rc; |
dec63ec3 | 231 | |
8378b924 | 232 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; |
1da177e4 LT |
233 | } |
234 | ||
235 | /* | |
236 | * Read the fan status. | |
237 | */ | |
238 | static int i8k_get_fan_status(int fan) | |
239 | { | |
8378b924 | 240 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
1da177e4 | 241 | |
dec63ec3 | 242 | regs.ebx = fan & 0xff; |
8378b924 | 243 | return i8k_smm(®s) ? : regs.eax & 0xff; |
1da177e4 LT |
244 | } |
245 | ||
246 | /* | |
247 | * Read the fan speed in RPM. | |
248 | */ | |
249 | static int i8k_get_fan_speed(int fan) | |
250 | { | |
8378b924 | 251 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
1da177e4 | 252 | |
dec63ec3 | 253 | regs.ebx = fan & 0xff; |
4ed99a27 | 254 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * fan_mult; |
1da177e4 LT |
255 | } |
256 | ||
257 | /* | |
258 | * Set the fan speed (off, low, high). Returns the new fan status. | |
259 | */ | |
260 | static int i8k_set_fan(int fan, int speed) | |
261 | { | |
8378b924 | 262 | struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
1da177e4 | 263 | |
dec63ec3 | 264 | speed = (speed < 0) ? 0 : ((speed > I8K_FAN_MAX) ? I8K_FAN_MAX : speed); |
dec63ec3 | 265 | regs.ebx = (fan & 0xff) | (speed << 8); |
1da177e4 | 266 | |
8378b924 | 267 | return i8k_smm(®s) ? : i8k_get_fan_status(fan); |
1da177e4 LT |
268 | } |
269 | ||
270 | /* | |
271 | * Read the cpu temperature. | |
272 | */ | |
7e0fa31d | 273 | static int i8k_get_temp(int sensor) |
1da177e4 | 274 | { |
8378b924 | 275 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP, }; |
dec63ec3 DT |
276 | int rc; |
277 | int temp; | |
1da177e4 LT |
278 | |
279 | #ifdef I8K_TEMPERATURE_BUG | |
8378b924 | 280 | static int prev; |
1da177e4 | 281 | #endif |
7e0fa31d | 282 | regs.ebx = sensor & 0xff; |
8378b924 | 283 | if ((rc = i8k_smm(®s)) < 0) |
dec63ec3 | 284 | return rc; |
8378b924 | 285 | |
dec63ec3 | 286 | temp = regs.eax & 0xff; |
1da177e4 LT |
287 | |
288 | #ifdef I8K_TEMPERATURE_BUG | |
dec63ec3 DT |
289 | /* |
290 | * Sometimes the temperature sensor returns 0x99, which is out of range. | |
291 | * In this case we return (once) the previous cached value. For example: | |
292 | # 1003655137 00000058 00005a4b | |
293 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees | |
294 | # 1003655139 00000054 00005c52 | |
295 | */ | |
296 | if (temp > I8K_MAX_TEMP) { | |
297 | temp = prev; | |
298 | prev = I8K_MAX_TEMP; | |
299 | } else { | |
300 | prev = temp; | |
301 | } | |
1da177e4 LT |
302 | #endif |
303 | ||
dec63ec3 | 304 | return temp; |
1da177e4 LT |
305 | } |
306 | ||
7e0fa31d | 307 | static int i8k_get_dell_signature(int req_fn) |
1da177e4 | 308 | { |
7e0fa31d | 309 | struct smm_regs regs = { .eax = req_fn, }; |
dec63ec3 | 310 | int rc; |
1da177e4 | 311 | |
8378b924 | 312 | if ((rc = i8k_smm(®s)) < 0) |
dec63ec3 | 313 | return rc; |
1da177e4 | 314 | |
8378b924 | 315 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
1da177e4 LT |
316 | } |
317 | ||
d79b6f4d FW |
318 | static int |
319 | i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 320 | { |
e70c9d5e | 321 | int val = 0; |
dec63ec3 DT |
322 | int speed; |
323 | unsigned char buff[16]; | |
324 | int __user *argp = (int __user *)arg; | |
325 | ||
326 | if (!argp) | |
327 | return -EINVAL; | |
328 | ||
329 | switch (cmd) { | |
330 | case I8K_BIOS_VERSION: | |
331 | val = i8k_get_bios_version(); | |
332 | break; | |
333 | ||
334 | case I8K_MACHINE_ID: | |
335 | memset(buff, 0, 16); | |
e70c9d5e | 336 | strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), sizeof(buff)); |
dec63ec3 DT |
337 | break; |
338 | ||
339 | case I8K_FN_STATUS: | |
340 | val = i8k_get_fn_status(); | |
341 | break; | |
342 | ||
343 | case I8K_POWER_STATUS: | |
344 | val = i8k_get_power_status(); | |
345 | break; | |
346 | ||
347 | case I8K_GET_TEMP: | |
7e0fa31d | 348 | val = i8k_get_temp(0); |
dec63ec3 DT |
349 | break; |
350 | ||
351 | case I8K_GET_SPEED: | |
8378b924 | 352 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 353 | return -EFAULT; |
8378b924 | 354 | |
dec63ec3 DT |
355 | val = i8k_get_fan_speed(val); |
356 | break; | |
1da177e4 | 357 | |
dec63ec3 | 358 | case I8K_GET_FAN: |
8378b924 | 359 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 360 | return -EFAULT; |
8378b924 | 361 | |
dec63ec3 DT |
362 | val = i8k_get_fan_status(val); |
363 | break; | |
1da177e4 | 364 | |
dec63ec3 | 365 | case I8K_SET_FAN: |
8378b924 | 366 | if (restricted && !capable(CAP_SYS_ADMIN)) |
dec63ec3 | 367 | return -EPERM; |
8378b924 DT |
368 | |
369 | if (copy_from_user(&val, argp, sizeof(int))) | |
dec63ec3 | 370 | return -EFAULT; |
8378b924 DT |
371 | |
372 | if (copy_from_user(&speed, argp + 1, sizeof(int))) | |
dec63ec3 | 373 | return -EFAULT; |
8378b924 | 374 | |
dec63ec3 DT |
375 | val = i8k_set_fan(val, speed); |
376 | break; | |
1da177e4 | 377 | |
dec63ec3 DT |
378 | default: |
379 | return -EINVAL; | |
1da177e4 | 380 | } |
1da177e4 | 381 | |
8378b924 | 382 | if (val < 0) |
dec63ec3 | 383 | return val; |
1da177e4 | 384 | |
dec63ec3 DT |
385 | switch (cmd) { |
386 | case I8K_BIOS_VERSION: | |
8378b924 | 387 | if (copy_to_user(argp, &val, 4)) |
dec63ec3 | 388 | return -EFAULT; |
8378b924 | 389 | |
dec63ec3 DT |
390 | break; |
391 | case I8K_MACHINE_ID: | |
8378b924 | 392 | if (copy_to_user(argp, buff, 16)) |
dec63ec3 | 393 | return -EFAULT; |
8378b924 | 394 | |
dec63ec3 DT |
395 | break; |
396 | default: | |
8378b924 | 397 | if (copy_to_user(argp, &val, sizeof(int))) |
dec63ec3 | 398 | return -EFAULT; |
8378b924 | 399 | |
dec63ec3 | 400 | break; |
1da177e4 | 401 | } |
1da177e4 | 402 | |
dec63ec3 | 403 | return 0; |
1da177e4 LT |
404 | } |
405 | ||
d79b6f4d FW |
406 | static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
407 | { | |
408 | long ret; | |
409 | ||
613655fa | 410 | mutex_lock(&i8k_mutex); |
d79b6f4d | 411 | ret = i8k_ioctl_unlocked(fp, cmd, arg); |
613655fa | 412 | mutex_unlock(&i8k_mutex); |
d79b6f4d FW |
413 | |
414 | return ret; | |
415 | } | |
416 | ||
1da177e4 LT |
417 | /* |
418 | * Print the information for /proc/i8k. | |
419 | */ | |
352f8f8b | 420 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
1da177e4 | 421 | { |
352f8f8b | 422 | int fn_key, cpu_temp, ac_power; |
dec63ec3 DT |
423 | int left_fan, right_fan, left_speed, right_speed; |
424 | ||
96de0e25 JE |
425 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
426 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ | |
427 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ | |
428 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ | |
429 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ | |
430 | fn_key = i8k_get_fn_status(); /* 750 µs */ | |
8378b924 | 431 | if (power_status) |
96de0e25 | 432 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
8378b924 | 433 | else |
dec63ec3 | 434 | ac_power = -1; |
dec63ec3 DT |
435 | |
436 | /* | |
437 | * Info: | |
438 | * | |
439 | * 1) Format version (this will change if format changes) | |
440 | * 2) BIOS version | |
441 | * 3) BIOS machine ID | |
442 | * 4) Cpu temperature | |
443 | * 5) Left fan status | |
444 | * 6) Right fan status | |
445 | * 7) Left fan speed | |
446 | * 8) Right fan speed | |
447 | * 9) AC power | |
448 | * 10) Fn Key status | |
449 | */ | |
352f8f8b DT |
450 | return seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
451 | I8K_PROC_FMT, | |
452 | bios_version, | |
4f005551 | 453 | i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
352f8f8b DT |
454 | cpu_temp, |
455 | left_fan, right_fan, left_speed, right_speed, | |
456 | ac_power, fn_key); | |
1da177e4 LT |
457 | } |
458 | ||
352f8f8b | 459 | static int i8k_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 460 | { |
352f8f8b | 461 | return single_open(file, i8k_proc_show, NULL); |
1da177e4 LT |
462 | } |
463 | ||
949a9d70 JD |
464 | |
465 | /* | |
466 | * Hwmon interface | |
467 | */ | |
468 | ||
469 | static ssize_t i8k_hwmon_show_temp(struct device *dev, | |
470 | struct device_attribute *devattr, | |
471 | char *buf) | |
472 | { | |
473 | int cpu_temp; | |
474 | ||
475 | cpu_temp = i8k_get_temp(0); | |
476 | if (cpu_temp < 0) | |
477 | return cpu_temp; | |
478 | return sprintf(buf, "%d\n", cpu_temp * 1000); | |
479 | } | |
480 | ||
481 | static ssize_t i8k_hwmon_show_fan(struct device *dev, | |
482 | struct device_attribute *devattr, | |
483 | char *buf) | |
484 | { | |
485 | int index = to_sensor_dev_attr(devattr)->index; | |
486 | int fan_speed; | |
487 | ||
488 | fan_speed = i8k_get_fan_speed(index); | |
489 | if (fan_speed < 0) | |
490 | return fan_speed; | |
491 | return sprintf(buf, "%d\n", fan_speed); | |
492 | } | |
493 | ||
494 | static ssize_t i8k_hwmon_show_label(struct device *dev, | |
495 | struct device_attribute *devattr, | |
496 | char *buf) | |
497 | { | |
498 | static const char *labels[4] = { | |
499 | "i8k", | |
500 | "CPU", | |
501 | "Left Fan", | |
502 | "Right Fan", | |
503 | }; | |
504 | int index = to_sensor_dev_attr(devattr)->index; | |
505 | ||
506 | return sprintf(buf, "%s\n", labels[index]); | |
507 | } | |
508 | ||
509 | static DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL); | |
510 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, | |
511 | I8K_FAN_LEFT); | |
512 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL, | |
513 | I8K_FAN_RIGHT); | |
514 | static SENSOR_DEVICE_ATTR(name, S_IRUGO, i8k_hwmon_show_label, NULL, 0); | |
515 | static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 1); | |
516 | static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 2); | |
517 | static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_label, NULL, 3); | |
518 | ||
519 | static void i8k_hwmon_remove_files(struct device *dev) | |
520 | { | |
521 | device_remove_file(dev, &dev_attr_temp1_input); | |
522 | device_remove_file(dev, &sensor_dev_attr_fan1_input.dev_attr); | |
523 | device_remove_file(dev, &sensor_dev_attr_fan2_input.dev_attr); | |
524 | device_remove_file(dev, &sensor_dev_attr_temp1_label.dev_attr); | |
525 | device_remove_file(dev, &sensor_dev_attr_fan1_label.dev_attr); | |
526 | device_remove_file(dev, &sensor_dev_attr_fan2_label.dev_attr); | |
527 | device_remove_file(dev, &sensor_dev_attr_name.dev_attr); | |
528 | } | |
529 | ||
530 | static int __init i8k_init_hwmon(void) | |
531 | { | |
532 | int err; | |
533 | ||
534 | i8k_hwmon_dev = hwmon_device_register(NULL); | |
535 | if (IS_ERR(i8k_hwmon_dev)) { | |
536 | err = PTR_ERR(i8k_hwmon_dev); | |
537 | i8k_hwmon_dev = NULL; | |
538 | printk(KERN_ERR "i8k: hwmon registration failed (%d)\n", err); | |
539 | return err; | |
540 | } | |
541 | ||
542 | /* Required name attribute */ | |
543 | err = device_create_file(i8k_hwmon_dev, | |
544 | &sensor_dev_attr_name.dev_attr); | |
545 | if (err) | |
546 | goto exit_unregister; | |
547 | ||
548 | /* CPU temperature attributes, if temperature reading is OK */ | |
549 | err = i8k_get_temp(0); | |
550 | if (err < 0) { | |
551 | dev_dbg(i8k_hwmon_dev, | |
552 | "Not creating temperature attributes (%d)\n", err); | |
553 | } else { | |
554 | err = device_create_file(i8k_hwmon_dev, &dev_attr_temp1_input); | |
555 | if (err) | |
556 | goto exit_remove_files; | |
557 | err = device_create_file(i8k_hwmon_dev, | |
558 | &sensor_dev_attr_temp1_label.dev_attr); | |
559 | if (err) | |
560 | goto exit_remove_files; | |
561 | } | |
562 | ||
563 | /* Left fan attributes, if left fan is present */ | |
564 | err = i8k_get_fan_status(I8K_FAN_LEFT); | |
565 | if (err < 0) { | |
566 | dev_dbg(i8k_hwmon_dev, | |
567 | "Not creating %s fan attributes (%d)\n", "left", err); | |
568 | } else { | |
569 | err = device_create_file(i8k_hwmon_dev, | |
570 | &sensor_dev_attr_fan1_input.dev_attr); | |
571 | if (err) | |
572 | goto exit_remove_files; | |
573 | err = device_create_file(i8k_hwmon_dev, | |
574 | &sensor_dev_attr_fan1_label.dev_attr); | |
575 | if (err) | |
576 | goto exit_remove_files; | |
577 | } | |
578 | ||
579 | /* Right fan attributes, if right fan is present */ | |
580 | err = i8k_get_fan_status(I8K_FAN_RIGHT); | |
581 | if (err < 0) { | |
582 | dev_dbg(i8k_hwmon_dev, | |
583 | "Not creating %s fan attributes (%d)\n", "right", err); | |
584 | } else { | |
585 | err = device_create_file(i8k_hwmon_dev, | |
586 | &sensor_dev_attr_fan2_input.dev_attr); | |
587 | if (err) | |
588 | goto exit_remove_files; | |
589 | err = device_create_file(i8k_hwmon_dev, | |
590 | &sensor_dev_attr_fan2_label.dev_attr); | |
591 | if (err) | |
592 | goto exit_remove_files; | |
593 | } | |
594 | ||
595 | return 0; | |
596 | ||
597 | exit_remove_files: | |
598 | i8k_hwmon_remove_files(i8k_hwmon_dev); | |
599 | exit_unregister: | |
600 | hwmon_device_unregister(i8k_hwmon_dev); | |
601 | return err; | |
602 | } | |
603 | ||
604 | static void __exit i8k_exit_hwmon(void) | |
605 | { | |
606 | i8k_hwmon_remove_files(i8k_hwmon_dev); | |
607 | hwmon_device_unregister(i8k_hwmon_dev); | |
608 | } | |
609 | ||
e70c9d5e DT |
610 | static struct dmi_system_id __initdata i8k_dmi_table[] = { |
611 | { | |
612 | .ident = "Dell Inspiron", | |
613 | .matches = { | |
614 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
615 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
616 | }, | |
617 | }, | |
618 | { | |
619 | .ident = "Dell Latitude", | |
620 | .matches = { | |
621 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
622 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
623 | }, | |
624 | }, | |
7e0fa31d DT |
625 | { |
626 | .ident = "Dell Inspiron 2", | |
627 | .matches = { | |
628 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
629 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
630 | }, | |
631 | }, | |
632 | { | |
633 | .ident = "Dell Latitude 2", | |
634 | .matches = { | |
635 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
636 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
637 | }, | |
638 | }, | |
a9000d03 NW |
639 | { /* UK Inspiron 6400 */ |
640 | .ident = "Dell Inspiron 3", | |
641 | .matches = { | |
642 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
643 | DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), | |
644 | }, | |
645 | }, | |
48103c52 FS |
646 | { |
647 | .ident = "Dell Inspiron 3", | |
648 | .matches = { | |
649 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
650 | DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), | |
651 | }, | |
652 | }, | |
7ab21a86 AS |
653 | { |
654 | .ident = "Dell Precision", | |
655 | .matches = { | |
656 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
657 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), | |
658 | }, | |
659 | }, | |
bef2a508 FH |
660 | { |
661 | .ident = "Dell Vostro", | |
662 | .matches = { | |
663 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
664 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), | |
665 | }, | |
666 | }, | |
667 | { } | |
e70c9d5e | 668 | }; |
1da177e4 LT |
669 | |
670 | /* | |
671 | * Probe for the presence of a supported laptop. | |
672 | */ | |
673 | static int __init i8k_probe(void) | |
674 | { | |
dec63ec3 DT |
675 | char buff[4]; |
676 | int version; | |
dec63ec3 | 677 | |
1da177e4 | 678 | /* |
dec63ec3 | 679 | * Get DMI information |
1da177e4 | 680 | */ |
e70c9d5e DT |
681 | if (!dmi_check_system(i8k_dmi_table)) { |
682 | if (!ignore_dmi && !force) | |
683 | return -ENODEV; | |
684 | ||
685 | printk(KERN_INFO "i8k: not running on a supported Dell system.\n"); | |
dec63ec3 | 686 | printk(KERN_INFO "i8k: vendor=%s, model=%s, version=%s\n", |
e70c9d5e DT |
687 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
688 | i8k_get_dmi_data(DMI_PRODUCT_NAME), | |
689 | i8k_get_dmi_data(DMI_BIOS_VERSION)); | |
1da177e4 | 690 | } |
dec63ec3 | 691 | |
e70c9d5e DT |
692 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), sizeof(bios_version)); |
693 | ||
1da177e4 | 694 | /* |
dec63ec3 | 695 | * Get SMM Dell signature |
1da177e4 | 696 | */ |
7e0fa31d DT |
697 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
698 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { | |
e70c9d5e DT |
699 | printk(KERN_ERR "i8k: unable to get SMM Dell signature\n"); |
700 | if (!force) | |
701 | return -ENODEV; | |
1da177e4 | 702 | } |
1da177e4 | 703 | |
dec63ec3 DT |
704 | /* |
705 | * Get SMM BIOS version. | |
706 | */ | |
707 | version = i8k_get_bios_version(); | |
708 | if (version <= 0) { | |
e70c9d5e | 709 | printk(KERN_WARNING "i8k: unable to get SMM BIOS version\n"); |
dec63ec3 | 710 | } else { |
dec63ec3 DT |
711 | buff[0] = (version >> 16) & 0xff; |
712 | buff[1] = (version >> 8) & 0xff; | |
713 | buff[2] = (version) & 0xff; | |
714 | buff[3] = '\0'; | |
715 | /* | |
716 | * If DMI BIOS version is unknown use SMM BIOS version. | |
717 | */ | |
e70c9d5e DT |
718 | if (!dmi_get_system_info(DMI_BIOS_VERSION)) |
719 | strlcpy(bios_version, buff, sizeof(bios_version)); | |
720 | ||
dec63ec3 DT |
721 | /* |
722 | * Check if the two versions match. | |
723 | */ | |
e70c9d5e DT |
724 | if (strncmp(buff, bios_version, sizeof(bios_version)) != 0) |
725 | printk(KERN_WARNING "i8k: BIOS version mismatch: %s != %s\n", | |
726 | buff, bios_version); | |
dec63ec3 | 727 | } |
1da177e4 | 728 | |
dec63ec3 | 729 | return 0; |
1da177e4 LT |
730 | } |
731 | ||
8378b924 | 732 | static int __init i8k_init(void) |
1da177e4 | 733 | { |
dec63ec3 | 734 | struct proc_dir_entry *proc_i8k; |
949a9d70 | 735 | int err; |
dec63ec3 DT |
736 | |
737 | /* Are we running on an supported laptop? */ | |
e70c9d5e | 738 | if (i8k_probe()) |
dec63ec3 | 739 | return -ENODEV; |
dec63ec3 DT |
740 | |
741 | /* Register the proc entry */ | |
1b502217 | 742 | proc_i8k = proc_create("i8k", 0, NULL, &i8k_fops); |
352f8f8b | 743 | if (!proc_i8k) |
dec63ec3 | 744 | return -ENOENT; |
352f8f8b | 745 | |
949a9d70 JD |
746 | err = i8k_init_hwmon(); |
747 | if (err) | |
748 | goto exit_remove_proc; | |
749 | ||
dec63ec3 DT |
750 | printk(KERN_INFO |
751 | "Dell laptop SMM driver v%s Massimo Dal Zotto (dz@debian.org)\n", | |
752 | I8K_VERSION); | |
753 | ||
754 | return 0; | |
949a9d70 JD |
755 | |
756 | exit_remove_proc: | |
757 | remove_proc_entry("i8k", NULL); | |
758 | return err; | |
1da177e4 LT |
759 | } |
760 | ||
8378b924 | 761 | static void __exit i8k_exit(void) |
1da177e4 | 762 | { |
949a9d70 | 763 | i8k_exit_hwmon(); |
dec63ec3 | 764 | remove_proc_entry("i8k", NULL); |
1da177e4 | 765 | } |
1da177e4 | 766 | |
8378b924 DT |
767 | module_init(i8k_init); |
768 | module_exit(i8k_exit); |