Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
a5afba16 | 2 | * dell-smm-hwmon.c -- Linux driver for accessing the SMM BIOS on Dell laptops. |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2001 Massimo Dal Zotto <dz@debian.org> | |
5 | * | |
949a9d70 | 6 | * Hwmon integration: |
7c81c60f | 7 | * Copyright (C) 2011 Jean Delvare <jdelvare@suse.de> |
564132d9 | 8 | * Copyright (C) 2013, 2014 Guenter Roeck <linux@roeck-us.net> |
a5afba16 | 9 | * Copyright (C) 2014, 2015 Pali Rohár <pali.rohar@gmail.com> |
949a9d70 | 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 | ||
60e71aaf GR |
22 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
23 | ||
564132d9 | 24 | #include <linux/delay.h> |
1da177e4 LT |
25 | #include <linux/module.h> |
26 | #include <linux/types.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/proc_fs.h> | |
352f8f8b | 29 | #include <linux/seq_file.h> |
e70c9d5e | 30 | #include <linux/dmi.h> |
7e80d0d0 | 31 | #include <linux/capability.h> |
613655fa | 32 | #include <linux/mutex.h> |
949a9d70 JD |
33 | #include <linux/hwmon.h> |
34 | #include <linux/hwmon-sysfs.h> | |
12186f51 GR |
35 | #include <linux/uaccess.h> |
36 | #include <linux/io.h> | |
f36fdb9f | 37 | #include <linux/sched.h> |
1da177e4 LT |
38 | |
39 | #include <linux/i8k.h> | |
40 | ||
1da177e4 LT |
41 | #define I8K_SMM_FN_STATUS 0x0025 |
42 | #define I8K_SMM_POWER_STATUS 0x0069 | |
43 | #define I8K_SMM_SET_FAN 0x01a3 | |
44 | #define I8K_SMM_GET_FAN 0x00a3 | |
45 | #define I8K_SMM_GET_SPEED 0x02a3 | |
f989e554 | 46 | #define I8K_SMM_GET_FAN_TYPE 0x03a3 |
8f21d8e9 | 47 | #define I8K_SMM_GET_NOM_SPEED 0x04a3 |
1da177e4 | 48 | #define I8K_SMM_GET_TEMP 0x10a3 |
5114b474 | 49 | #define I8K_SMM_GET_TEMP_TYPE 0x11a3 |
7e0fa31d DT |
50 | #define I8K_SMM_GET_DELL_SIG1 0xfea3 |
51 | #define I8K_SMM_GET_DELL_SIG2 0xffa3 | |
1da177e4 LT |
52 | |
53 | #define I8K_FAN_MULT 30 | |
8f21d8e9 | 54 | #define I8K_FAN_MAX_RPM 30000 |
1da177e4 LT |
55 | #define I8K_MAX_TEMP 127 |
56 | ||
57 | #define I8K_FN_NONE 0x00 | |
58 | #define I8K_FN_UP 0x01 | |
59 | #define I8K_FN_DOWN 0x02 | |
60 | #define I8K_FN_MUTE 0x04 | |
61 | #define I8K_FN_MASK 0x07 | |
62 | #define I8K_FN_SHIFT 8 | |
63 | ||
64 | #define I8K_POWER_AC 0x05 | |
65 | #define I8K_POWER_BATTERY 0x01 | |
66 | ||
613655fa | 67 | static DEFINE_MUTEX(i8k_mutex); |
e70c9d5e | 68 | static char bios_version[4]; |
949a9d70 | 69 | static struct device *i8k_hwmon_dev; |
82ba1d3f | 70 | static u32 i8k_hwmon_flags; |
8f21d8e9 | 71 | static uint i8k_fan_mult = I8K_FAN_MULT; |
7f69fb03 PR |
72 | static uint i8k_pwm_mult; |
73 | static uint i8k_fan_max = I8K_FAN_HIGH; | |
82ba1d3f GR |
74 | |
75 | #define I8K_HWMON_HAVE_TEMP1 (1 << 0) | |
d83c39de GR |
76 | #define I8K_HWMON_HAVE_TEMP2 (1 << 1) |
77 | #define I8K_HWMON_HAVE_TEMP3 (1 << 2) | |
78 | #define I8K_HWMON_HAVE_TEMP4 (1 << 3) | |
79 | #define I8K_HWMON_HAVE_FAN1 (1 << 4) | |
80 | #define I8K_HWMON_HAVE_FAN2 (1 << 5) | |
1da177e4 LT |
81 | |
82 | MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); | |
a5afba16 | 83 | MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>"); |
039ae585 | 84 | MODULE_DESCRIPTION("Dell laptop SMM BIOS hwmon driver"); |
1da177e4 | 85 | MODULE_LICENSE("GPL"); |
a5afba16 | 86 | MODULE_ALIAS("i8k"); |
1da177e4 | 87 | |
90ab5ee9 | 88 | static bool force; |
1da177e4 LT |
89 | module_param(force, bool, 0); |
90 | MODULE_PARM_DESC(force, "Force loading without checking for supported models"); | |
91 | ||
90ab5ee9 | 92 | static bool ignore_dmi; |
e70c9d5e DT |
93 | module_param(ignore_dmi, bool, 0); |
94 | MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); | |
95 | ||
039ae585 | 96 | #if IS_ENABLED(CONFIG_I8K) |
90ab5ee9 | 97 | static bool restricted; |
1da177e4 LT |
98 | module_param(restricted, bool, 0); |
99 | MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set"); | |
100 | ||
90ab5ee9 | 101 | static bool power_status; |
1da177e4 LT |
102 | module_param(power_status, bool, 0600); |
103 | MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k"); | |
039ae585 | 104 | #endif |
1da177e4 | 105 | |
8f21d8e9 | 106 | static uint fan_mult; |
7f69fb03 | 107 | module_param(fan_mult, uint, 0); |
8f21d8e9 | 108 | MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with (default: autodetect)"); |
4ed99a27 | 109 | |
8f21d8e9 | 110 | static uint fan_max; |
7f69fb03 | 111 | module_param(fan_max, uint, 0); |
8f21d8e9 | 112 | MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed (default: autodetect)"); |
81474fc2 | 113 | |
8378b924 | 114 | struct smm_regs { |
dec63ec3 | 115 | unsigned int eax; |
12186f51 GR |
116 | unsigned int ebx __packed; |
117 | unsigned int ecx __packed; | |
118 | unsigned int edx __packed; | |
119 | unsigned int esi __packed; | |
120 | unsigned int edi __packed; | |
8378b924 | 121 | }; |
1da177e4 | 122 | |
1855256c | 123 | static inline const char *i8k_get_dmi_data(int field) |
e70c9d5e | 124 | { |
1855256c | 125 | const char *dmi_data = dmi_get_system_info(field); |
4f005551 DT |
126 | |
127 | return dmi_data && *dmi_data ? dmi_data : "?"; | |
e70c9d5e | 128 | } |
1da177e4 LT |
129 | |
130 | /* | |
131 | * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. | |
132 | */ | |
8378b924 | 133 | static int i8k_smm(struct smm_regs *regs) |
1da177e4 | 134 | { |
dec63ec3 DT |
135 | int rc; |
136 | int eax = regs->eax; | |
f36fdb9f GR |
137 | cpumask_var_t old_mask; |
138 | ||
139 | /* SMM requires CPU 0 */ | |
140 | if (!alloc_cpumask_var(&old_mask, GFP_KERNEL)) | |
141 | return -ENOMEM; | |
142 | cpumask_copy(old_mask, ¤t->cpus_allowed); | |
6d827fbc GR |
143 | rc = set_cpus_allowed_ptr(current, cpumask_of(0)); |
144 | if (rc) | |
145 | goto out; | |
f36fdb9f GR |
146 | if (smp_processor_id() != 0) { |
147 | rc = -EBUSY; | |
148 | goto out; | |
149 | } | |
dec63ec3 | 150 | |
fe04f22f | 151 | #if defined(CONFIG_X86_64) |
22d3243d | 152 | asm volatile("pushq %%rax\n\t" |
fe04f22f BS |
153 | "movl 0(%%rax),%%edx\n\t" |
154 | "pushq %%rdx\n\t" | |
155 | "movl 4(%%rax),%%ebx\n\t" | |
156 | "movl 8(%%rax),%%ecx\n\t" | |
157 | "movl 12(%%rax),%%edx\n\t" | |
158 | "movl 16(%%rax),%%esi\n\t" | |
159 | "movl 20(%%rax),%%edi\n\t" | |
160 | "popq %%rax\n\t" | |
161 | "out %%al,$0xb2\n\t" | |
162 | "out %%al,$0x84\n\t" | |
163 | "xchgq %%rax,(%%rsp)\n\t" | |
164 | "movl %%ebx,4(%%rax)\n\t" | |
165 | "movl %%ecx,8(%%rax)\n\t" | |
166 | "movl %%edx,12(%%rax)\n\t" | |
167 | "movl %%esi,16(%%rax)\n\t" | |
168 | "movl %%edi,20(%%rax)\n\t" | |
169 | "popq %%rdx\n\t" | |
170 | "movl %%edx,0(%%rax)\n\t" | |
bc1f419c LT |
171 | "pushfq\n\t" |
172 | "popq %%rax\n\t" | |
fe04f22f | 173 | "andl $1,%%eax\n" |
12186f51 | 174 | : "=a"(rc) |
fe04f22f BS |
175 | : "a"(regs) |
176 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
177 | #else | |
22d3243d | 178 | asm volatile("pushl %%eax\n\t" |
dec63ec3 DT |
179 | "movl 0(%%eax),%%edx\n\t" |
180 | "push %%edx\n\t" | |
181 | "movl 4(%%eax),%%ebx\n\t" | |
182 | "movl 8(%%eax),%%ecx\n\t" | |
183 | "movl 12(%%eax),%%edx\n\t" | |
184 | "movl 16(%%eax),%%esi\n\t" | |
185 | "movl 20(%%eax),%%edi\n\t" | |
186 | "popl %%eax\n\t" | |
187 | "out %%al,$0xb2\n\t" | |
188 | "out %%al,$0x84\n\t" | |
189 | "xchgl %%eax,(%%esp)\n\t" | |
190 | "movl %%ebx,4(%%eax)\n\t" | |
191 | "movl %%ecx,8(%%eax)\n\t" | |
192 | "movl %%edx,12(%%eax)\n\t" | |
193 | "movl %%esi,16(%%eax)\n\t" | |
194 | "movl %%edi,20(%%eax)\n\t" | |
195 | "popl %%edx\n\t" | |
196 | "movl %%edx,0(%%eax)\n\t" | |
197 | "lahf\n\t" | |
198 | "shrl $8,%%eax\n\t" | |
6b4e81db | 199 | "andl $1,%%eax\n" |
12186f51 | 200 | : "=a"(rc) |
dec63ec3 DT |
201 | : "a"(regs) |
202 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
fe04f22f | 203 | #endif |
8378b924 | 204 | if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
f36fdb9f | 205 | rc = -EINVAL; |
dec63ec3 | 206 | |
f36fdb9f GR |
207 | out: |
208 | set_cpus_allowed_ptr(current, old_mask); | |
209 | free_cpumask_var(old_mask); | |
210 | return rc; | |
1da177e4 LT |
211 | } |
212 | ||
1da177e4 LT |
213 | /* |
214 | * Read the fan status. | |
215 | */ | |
216 | static int i8k_get_fan_status(int fan) | |
217 | { | |
8378b924 | 218 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
1da177e4 | 219 | |
dec63ec3 | 220 | regs.ebx = fan & 0xff; |
8378b924 | 221 | return i8k_smm(®s) ? : regs.eax & 0xff; |
1da177e4 LT |
222 | } |
223 | ||
224 | /* | |
225 | * Read the fan speed in RPM. | |
226 | */ | |
227 | static int i8k_get_fan_speed(int fan) | |
228 | { | |
8378b924 | 229 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
1da177e4 | 230 | |
dec63ec3 | 231 | regs.ebx = fan & 0xff; |
26d09382 | 232 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; |
1da177e4 LT |
233 | } |
234 | ||
f989e554 PR |
235 | /* |
236 | * Read the fan type. | |
237 | */ | |
238 | static int i8k_get_fan_type(int fan) | |
239 | { | |
240 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN_TYPE, }; | |
241 | ||
242 | regs.ebx = fan & 0xff; | |
243 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
244 | } | |
245 | ||
8f21d8e9 PR |
246 | /* |
247 | * Read the fan nominal rpm for specific fan speed. | |
248 | */ | |
249 | static int i8k_get_fan_nominal_speed(int fan, int speed) | |
250 | { | |
251 | struct smm_regs regs = { .eax = I8K_SMM_GET_NOM_SPEED, }; | |
252 | ||
253 | regs.ebx = (fan & 0xff) | (speed << 8); | |
254 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; | |
255 | } | |
256 | ||
1da177e4 LT |
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 | |
81474fc2 | 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 | ||
5114b474 PR |
270 | static int i8k_get_temp_type(int sensor) |
271 | { | |
272 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP_TYPE, }; | |
273 | ||
274 | regs.ebx = sensor & 0xff; | |
275 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
276 | } | |
277 | ||
1da177e4 LT |
278 | /* |
279 | * Read the cpu temperature. | |
280 | */ | |
564132d9 | 281 | static int _i8k_get_temp(int sensor) |
1da177e4 | 282 | { |
564132d9 GR |
283 | struct smm_regs regs = { |
284 | .eax = I8K_SMM_GET_TEMP, | |
285 | .ebx = sensor & 0xff, | |
286 | }; | |
1da177e4 | 287 | |
564132d9 GR |
288 | return i8k_smm(®s) ? : regs.eax & 0xff; |
289 | } | |
8378b924 | 290 | |
564132d9 GR |
291 | static int i8k_get_temp(int sensor) |
292 | { | |
293 | int temp = _i8k_get_temp(sensor); | |
1da177e4 | 294 | |
dec63ec3 DT |
295 | /* |
296 | * Sometimes the temperature sensor returns 0x99, which is out of range. | |
564132d9 | 297 | * In this case we retry (once) before returning an error. |
dec63ec3 DT |
298 | # 1003655137 00000058 00005a4b |
299 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees | |
300 | # 1003655139 00000054 00005c52 | |
301 | */ | |
564132d9 GR |
302 | if (temp == 0x99) { |
303 | msleep(100); | |
304 | temp = _i8k_get_temp(sensor); | |
dec63ec3 | 305 | } |
564132d9 GR |
306 | /* |
307 | * Return -ENODATA for all invalid temperatures. | |
308 | * | |
309 | * Known instances are the 0x99 value as seen above as well as | |
310 | * 0xc1 (193), which may be returned when trying to read the GPU | |
311 | * temperature if the system supports a GPU and it is currently | |
312 | * turned off. | |
313 | */ | |
723493ca | 314 | if (temp > I8K_MAX_TEMP) |
83d514d7 | 315 | return -ENODATA; |
1da177e4 | 316 | |
dec63ec3 | 317 | return temp; |
1da177e4 LT |
318 | } |
319 | ||
7e0fa31d | 320 | static int i8k_get_dell_signature(int req_fn) |
1da177e4 | 321 | { |
7e0fa31d | 322 | struct smm_regs regs = { .eax = req_fn, }; |
dec63ec3 | 323 | int rc; |
1da177e4 | 324 | |
12186f51 GR |
325 | rc = i8k_smm(®s); |
326 | if (rc < 0) | |
dec63ec3 | 327 | return rc; |
1da177e4 | 328 | |
8378b924 | 329 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
1da177e4 LT |
330 | } |
331 | ||
039ae585 PR |
332 | #if IS_ENABLED(CONFIG_I8K) |
333 | ||
334 | /* | |
335 | * Read the Fn key status. | |
336 | */ | |
337 | static int i8k_get_fn_status(void) | |
338 | { | |
339 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; | |
340 | int rc; | |
341 | ||
342 | rc = i8k_smm(®s); | |
343 | if (rc < 0) | |
344 | return rc; | |
345 | ||
346 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { | |
347 | case I8K_FN_UP: | |
348 | return I8K_VOL_UP; | |
349 | case I8K_FN_DOWN: | |
350 | return I8K_VOL_DOWN; | |
351 | case I8K_FN_MUTE: | |
352 | return I8K_VOL_MUTE; | |
353 | default: | |
354 | return 0; | |
355 | } | |
356 | } | |
357 | ||
358 | /* | |
359 | * Read the power status. | |
360 | */ | |
361 | static int i8k_get_power_status(void) | |
362 | { | |
363 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; | |
364 | int rc; | |
365 | ||
366 | rc = i8k_smm(®s); | |
367 | if (rc < 0) | |
368 | return rc; | |
369 | ||
370 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; | |
371 | } | |
372 | ||
373 | /* | |
374 | * Procfs interface | |
375 | */ | |
376 | ||
d79b6f4d FW |
377 | static int |
378 | i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 379 | { |
e70c9d5e | 380 | int val = 0; |
dec63ec3 DT |
381 | int speed; |
382 | unsigned char buff[16]; | |
383 | int __user *argp = (int __user *)arg; | |
384 | ||
385 | if (!argp) | |
386 | return -EINVAL; | |
387 | ||
388 | switch (cmd) { | |
389 | case I8K_BIOS_VERSION: | |
e551b152 GR |
390 | val = (bios_version[0] << 16) | |
391 | (bios_version[1] << 8) | bios_version[2]; | |
dec63ec3 DT |
392 | break; |
393 | ||
394 | case I8K_MACHINE_ID: | |
395 | memset(buff, 0, 16); | |
12186f51 GR |
396 | strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
397 | sizeof(buff)); | |
dec63ec3 DT |
398 | break; |
399 | ||
400 | case I8K_FN_STATUS: | |
401 | val = i8k_get_fn_status(); | |
402 | break; | |
403 | ||
404 | case I8K_POWER_STATUS: | |
405 | val = i8k_get_power_status(); | |
406 | break; | |
407 | ||
408 | case I8K_GET_TEMP: | |
7e0fa31d | 409 | val = i8k_get_temp(0); |
dec63ec3 DT |
410 | break; |
411 | ||
412 | case I8K_GET_SPEED: | |
8378b924 | 413 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 414 | return -EFAULT; |
8378b924 | 415 | |
dec63ec3 DT |
416 | val = i8k_get_fan_speed(val); |
417 | break; | |
1da177e4 | 418 | |
dec63ec3 | 419 | case I8K_GET_FAN: |
8378b924 | 420 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 421 | return -EFAULT; |
8378b924 | 422 | |
dec63ec3 DT |
423 | val = i8k_get_fan_status(val); |
424 | break; | |
1da177e4 | 425 | |
dec63ec3 | 426 | case I8K_SET_FAN: |
8378b924 | 427 | if (restricted && !capable(CAP_SYS_ADMIN)) |
dec63ec3 | 428 | return -EPERM; |
8378b924 DT |
429 | |
430 | if (copy_from_user(&val, argp, sizeof(int))) | |
dec63ec3 | 431 | return -EFAULT; |
8378b924 DT |
432 | |
433 | if (copy_from_user(&speed, argp + 1, sizeof(int))) | |
dec63ec3 | 434 | return -EFAULT; |
8378b924 | 435 | |
dec63ec3 DT |
436 | val = i8k_set_fan(val, speed); |
437 | break; | |
1da177e4 | 438 | |
dec63ec3 DT |
439 | default: |
440 | return -EINVAL; | |
1da177e4 | 441 | } |
1da177e4 | 442 | |
8378b924 | 443 | if (val < 0) |
dec63ec3 | 444 | return val; |
1da177e4 | 445 | |
dec63ec3 DT |
446 | switch (cmd) { |
447 | case I8K_BIOS_VERSION: | |
8378b924 | 448 | if (copy_to_user(argp, &val, 4)) |
dec63ec3 | 449 | return -EFAULT; |
8378b924 | 450 | |
dec63ec3 DT |
451 | break; |
452 | case I8K_MACHINE_ID: | |
8378b924 | 453 | if (copy_to_user(argp, buff, 16)) |
dec63ec3 | 454 | return -EFAULT; |
8378b924 | 455 | |
dec63ec3 DT |
456 | break; |
457 | default: | |
8378b924 | 458 | if (copy_to_user(argp, &val, sizeof(int))) |
dec63ec3 | 459 | return -EFAULT; |
8378b924 | 460 | |
dec63ec3 | 461 | break; |
1da177e4 | 462 | } |
1da177e4 | 463 | |
dec63ec3 | 464 | return 0; |
1da177e4 LT |
465 | } |
466 | ||
d79b6f4d FW |
467 | static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
468 | { | |
469 | long ret; | |
470 | ||
613655fa | 471 | mutex_lock(&i8k_mutex); |
d79b6f4d | 472 | ret = i8k_ioctl_unlocked(fp, cmd, arg); |
613655fa | 473 | mutex_unlock(&i8k_mutex); |
d79b6f4d FW |
474 | |
475 | return ret; | |
476 | } | |
477 | ||
1da177e4 LT |
478 | /* |
479 | * Print the information for /proc/i8k. | |
480 | */ | |
352f8f8b | 481 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
1da177e4 | 482 | { |
352f8f8b | 483 | int fn_key, cpu_temp, ac_power; |
dec63ec3 DT |
484 | int left_fan, right_fan, left_speed, right_speed; |
485 | ||
96de0e25 JE |
486 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
487 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ | |
488 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ | |
489 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ | |
490 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ | |
491 | fn_key = i8k_get_fn_status(); /* 750 µs */ | |
8378b924 | 492 | if (power_status) |
96de0e25 | 493 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
8378b924 | 494 | else |
dec63ec3 | 495 | ac_power = -1; |
dec63ec3 DT |
496 | |
497 | /* | |
498 | * Info: | |
499 | * | |
500 | * 1) Format version (this will change if format changes) | |
501 | * 2) BIOS version | |
502 | * 3) BIOS machine ID | |
503 | * 4) Cpu temperature | |
504 | * 5) Left fan status | |
505 | * 6) Right fan status | |
506 | * 7) Left fan speed | |
507 | * 8) Right fan speed | |
508 | * 9) AC power | |
509 | * 10) Fn Key status | |
510 | */ | |
3a267d3b JP |
511 | seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
512 | I8K_PROC_FMT, | |
513 | bios_version, | |
514 | i8k_get_dmi_data(DMI_PRODUCT_SERIAL), | |
515 | cpu_temp, | |
516 | left_fan, right_fan, left_speed, right_speed, | |
517 | ac_power, fn_key); | |
518 | ||
519 | return 0; | |
1da177e4 LT |
520 | } |
521 | ||
352f8f8b | 522 | static int i8k_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 523 | { |
352f8f8b | 524 | return single_open(file, i8k_proc_show, NULL); |
1da177e4 LT |
525 | } |
526 | ||
039ae585 PR |
527 | static const struct file_operations i8k_fops = { |
528 | .owner = THIS_MODULE, | |
529 | .open = i8k_open_fs, | |
530 | .read = seq_read, | |
531 | .llseek = seq_lseek, | |
532 | .release = single_release, | |
533 | .unlocked_ioctl = i8k_ioctl, | |
534 | }; | |
535 | ||
536 | static void __init i8k_init_procfs(void) | |
537 | { | |
538 | /* Register the proc entry */ | |
539 | proc_create("i8k", 0, NULL, &i8k_fops); | |
540 | } | |
541 | ||
542 | static void __exit i8k_exit_procfs(void) | |
543 | { | |
544 | remove_proc_entry("i8k", NULL); | |
545 | } | |
546 | ||
547 | #else | |
548 | ||
549 | static inline void __init i8k_init_procfs(void) | |
550 | { | |
551 | } | |
552 | ||
553 | static inline void __exit i8k_exit_procfs(void) | |
554 | { | |
555 | } | |
556 | ||
557 | #endif | |
949a9d70 JD |
558 | |
559 | /* | |
560 | * Hwmon interface | |
561 | */ | |
562 | ||
5114b474 PR |
563 | static ssize_t i8k_hwmon_show_temp_label(struct device *dev, |
564 | struct device_attribute *devattr, | |
565 | char *buf) | |
566 | { | |
567 | static const char * const labels[] = { | |
568 | "CPU", | |
569 | "GPU", | |
570 | "SODIMM", | |
571 | "Other", | |
572 | "Ambient", | |
573 | "Other", | |
574 | }; | |
575 | int index = to_sensor_dev_attr(devattr)->index; | |
576 | int type; | |
577 | ||
578 | type = i8k_get_temp_type(index); | |
579 | if (type < 0) | |
580 | return type; | |
581 | if (type >= ARRAY_SIZE(labels)) | |
582 | type = ARRAY_SIZE(labels) - 1; | |
583 | return sprintf(buf, "%s\n", labels[type]); | |
584 | } | |
585 | ||
949a9d70 JD |
586 | static ssize_t i8k_hwmon_show_temp(struct device *dev, |
587 | struct device_attribute *devattr, | |
588 | char *buf) | |
589 | { | |
d83c39de GR |
590 | int index = to_sensor_dev_attr(devattr)->index; |
591 | int temp; | |
949a9d70 | 592 | |
d83c39de GR |
593 | temp = i8k_get_temp(index); |
594 | if (temp < 0) | |
595 | return temp; | |
596 | return sprintf(buf, "%d\n", temp * 1000); | |
949a9d70 JD |
597 | } |
598 | ||
f989e554 PR |
599 | static ssize_t i8k_hwmon_show_fan_label(struct device *dev, |
600 | struct device_attribute *devattr, | |
601 | char *buf) | |
602 | { | |
603 | static const char * const labels[] = { | |
604 | "Processor Fan", | |
605 | "Motherboard Fan", | |
606 | "Video Fan", | |
607 | "Power Supply Fan", | |
608 | "Chipset Fan", | |
609 | "Other Fan", | |
610 | }; | |
611 | int index = to_sensor_dev_attr(devattr)->index; | |
612 | bool dock = false; | |
613 | int type; | |
614 | ||
615 | type = i8k_get_fan_type(index); | |
616 | if (type < 0) | |
617 | return type; | |
618 | ||
619 | if (type & 0x10) { | |
620 | dock = true; | |
621 | type &= 0x0F; | |
622 | } | |
623 | ||
624 | if (type >= ARRAY_SIZE(labels)) | |
625 | type = (ARRAY_SIZE(labels) - 1); | |
626 | ||
627 | return sprintf(buf, "%s%s\n", (dock ? "Docking " : ""), labels[type]); | |
628 | } | |
629 | ||
949a9d70 JD |
630 | static ssize_t i8k_hwmon_show_fan(struct device *dev, |
631 | struct device_attribute *devattr, | |
632 | char *buf) | |
633 | { | |
634 | int index = to_sensor_dev_attr(devattr)->index; | |
635 | int fan_speed; | |
636 | ||
637 | fan_speed = i8k_get_fan_speed(index); | |
638 | if (fan_speed < 0) | |
639 | return fan_speed; | |
640 | return sprintf(buf, "%d\n", fan_speed); | |
641 | } | |
642 | ||
e7f5f275 GR |
643 | static ssize_t i8k_hwmon_show_pwm(struct device *dev, |
644 | struct device_attribute *devattr, | |
645 | char *buf) | |
646 | { | |
647 | int index = to_sensor_dev_attr(devattr)->index; | |
648 | int status; | |
649 | ||
650 | status = i8k_get_fan_status(index); | |
651 | if (status < 0) | |
652 | return -EIO; | |
81474fc2 | 653 | return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255)); |
e7f5f275 GR |
654 | } |
655 | ||
656 | static ssize_t i8k_hwmon_set_pwm(struct device *dev, | |
657 | struct device_attribute *attr, | |
658 | const char *buf, size_t count) | |
659 | { | |
660 | int index = to_sensor_dev_attr(attr)->index; | |
661 | unsigned long val; | |
662 | int err; | |
663 | ||
664 | err = kstrtoul(buf, 10, &val); | |
665 | if (err) | |
666 | return err; | |
81474fc2 | 667 | val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max); |
e7f5f275 GR |
668 | |
669 | mutex_lock(&i8k_mutex); | |
670 | err = i8k_set_fan(index, val); | |
671 | mutex_unlock(&i8k_mutex); | |
672 | ||
673 | return err < 0 ? -EIO : count; | |
674 | } | |
675 | ||
d83c39de | 676 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0); |
5114b474 PR |
677 | static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
678 | 0); | |
d83c39de | 679 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1); |
5114b474 PR |
680 | static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
681 | 1); | |
d83c39de | 682 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2); |
5114b474 PR |
683 | static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
684 | 2); | |
d83c39de | 685 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 3); |
5114b474 PR |
686 | static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
687 | 3); | |
f989e554 PR |
688 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, 0); |
689 | static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL, | |
690 | 0); | |
e7f5f275 | 691 | static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
f989e554 | 692 | i8k_hwmon_set_pwm, 0); |
949a9d70 | 693 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
f989e554 PR |
694 | 1); |
695 | static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL, | |
696 | 1); | |
e7f5f275 | 697 | static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
f989e554 | 698 | i8k_hwmon_set_pwm, 1); |
82ba1d3f GR |
699 | |
700 | static struct attribute *i8k_attrs[] = { | |
d83c39de | 701 | &sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */ |
5114b474 PR |
702 | &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */ |
703 | &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */ | |
704 | &sensor_dev_attr_temp2_label.dev_attr.attr, /* 3 */ | |
705 | &sensor_dev_attr_temp3_input.dev_attr.attr, /* 4 */ | |
706 | &sensor_dev_attr_temp3_label.dev_attr.attr, /* 5 */ | |
707 | &sensor_dev_attr_temp4_input.dev_attr.attr, /* 6 */ | |
708 | &sensor_dev_attr_temp4_label.dev_attr.attr, /* 7 */ | |
709 | &sensor_dev_attr_fan1_input.dev_attr.attr, /* 8 */ | |
f989e554 PR |
710 | &sensor_dev_attr_fan1_label.dev_attr.attr, /* 9 */ |
711 | &sensor_dev_attr_pwm1.dev_attr.attr, /* 10 */ | |
712 | &sensor_dev_attr_fan2_input.dev_attr.attr, /* 11 */ | |
713 | &sensor_dev_attr_fan2_label.dev_attr.attr, /* 12 */ | |
714 | &sensor_dev_attr_pwm2.dev_attr.attr, /* 13 */ | |
82ba1d3f GR |
715 | NULL |
716 | }; | |
949a9d70 | 717 | |
82ba1d3f GR |
718 | static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, |
719 | int index) | |
949a9d70 | 720 | { |
5114b474 PR |
721 | if (index >= 0 && index <= 1 && |
722 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1)) | |
82ba1d3f | 723 | return 0; |
5114b474 PR |
724 | if (index >= 2 && index <= 3 && |
725 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2)) | |
d83c39de | 726 | return 0; |
5114b474 PR |
727 | if (index >= 4 && index <= 5 && |
728 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3)) | |
d83c39de | 729 | return 0; |
5114b474 PR |
730 | if (index >= 6 && index <= 7 && |
731 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4)) | |
d83c39de | 732 | return 0; |
f989e554 | 733 | if (index >= 8 && index <= 10 && |
82ba1d3f GR |
734 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1)) |
735 | return 0; | |
f989e554 | 736 | if (index >= 11 && index <= 13 && |
82ba1d3f GR |
737 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) |
738 | return 0; | |
739 | ||
740 | return attr->mode; | |
949a9d70 JD |
741 | } |
742 | ||
82ba1d3f GR |
743 | static const struct attribute_group i8k_group = { |
744 | .attrs = i8k_attrs, | |
745 | .is_visible = i8k_is_visible, | |
746 | }; | |
747 | __ATTRIBUTE_GROUPS(i8k); | |
748 | ||
949a9d70 JD |
749 | static int __init i8k_init_hwmon(void) |
750 | { | |
751 | int err; | |
752 | ||
82ba1d3f | 753 | i8k_hwmon_flags = 0; |
949a9d70 | 754 | |
672af223 PR |
755 | /* CPU temperature attributes, if temperature type is OK */ |
756 | err = i8k_get_temp_type(0); | |
757 | if (err >= 0) | |
82ba1d3f | 758 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1; |
d83c39de | 759 | /* check for additional temperature sensors */ |
672af223 PR |
760 | err = i8k_get_temp_type(1); |
761 | if (err >= 0) | |
d83c39de | 762 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2; |
672af223 PR |
763 | err = i8k_get_temp_type(2); |
764 | if (err >= 0) | |
d83c39de | 765 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3; |
672af223 PR |
766 | err = i8k_get_temp_type(3); |
767 | if (err >= 0) | |
d83c39de | 768 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4; |
949a9d70 | 769 | |
f989e554 PR |
770 | /* First fan attributes, if fan type is OK */ |
771 | err = i8k_get_fan_type(0); | |
82ba1d3f GR |
772 | if (err >= 0) |
773 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1; | |
949a9d70 | 774 | |
f989e554 PR |
775 | /* Second fan attributes, if fan type is OK */ |
776 | err = i8k_get_fan_type(1); | |
82ba1d3f GR |
777 | if (err >= 0) |
778 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2; | |
949a9d70 | 779 | |
039ae585 PR |
780 | i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "dell-smm", |
781 | NULL, i8k_groups); | |
82ba1d3f GR |
782 | if (IS_ERR(i8k_hwmon_dev)) { |
783 | err = PTR_ERR(i8k_hwmon_dev); | |
784 | i8k_hwmon_dev = NULL; | |
785 | pr_err("hwmon registration failed (%d)\n", err); | |
786 | return err; | |
787 | } | |
949a9d70 | 788 | return 0; |
949a9d70 JD |
789 | } |
790 | ||
81474fc2 | 791 | struct i8k_config_data { |
7f69fb03 PR |
792 | uint fan_mult; |
793 | uint fan_max; | |
81474fc2 GR |
794 | }; |
795 | ||
796 | enum i8k_configs { | |
7b883446 GR |
797 | DELL_LATITUDE_D520, |
798 | DELL_PRECISION_490, | |
81474fc2 | 799 | DELL_STUDIO, |
34ae40f6 | 800 | DELL_XPS, |
81474fc2 GR |
801 | }; |
802 | ||
803 | static const struct i8k_config_data i8k_config_data[] = { | |
7b883446 GR |
804 | [DELL_LATITUDE_D520] = { |
805 | .fan_mult = 1, | |
806 | .fan_max = I8K_FAN_TURBO, | |
807 | }, | |
808 | [DELL_PRECISION_490] = { | |
809 | .fan_mult = 1, | |
810 | .fan_max = I8K_FAN_TURBO, | |
811 | }, | |
81474fc2 GR |
812 | [DELL_STUDIO] = { |
813 | .fan_mult = 1, | |
814 | .fan_max = I8K_FAN_HIGH, | |
815 | }, | |
34ae40f6 | 816 | [DELL_XPS] = { |
81474fc2 GR |
817 | .fan_mult = 1, |
818 | .fan_max = I8K_FAN_HIGH, | |
819 | }, | |
820 | }; | |
821 | ||
12186f51 | 822 | static struct dmi_system_id i8k_dmi_table[] __initdata = { |
e70c9d5e DT |
823 | { |
824 | .ident = "Dell Inspiron", | |
825 | .matches = { | |
826 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
827 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
828 | }, | |
829 | }, | |
830 | { | |
831 | .ident = "Dell Latitude", | |
832 | .matches = { | |
833 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
834 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
835 | }, | |
836 | }, | |
7e0fa31d DT |
837 | { |
838 | .ident = "Dell Inspiron 2", | |
839 | .matches = { | |
840 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
841 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
842 | }, | |
843 | }, | |
7b883446 GR |
844 | { |
845 | .ident = "Dell Latitude D520", | |
846 | .matches = { | |
847 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
848 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"), | |
849 | }, | |
850 | .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520], | |
851 | }, | |
7e0fa31d DT |
852 | { |
853 | .ident = "Dell Latitude 2", | |
854 | .matches = { | |
855 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
856 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
857 | }, | |
858 | }, | |
a9000d03 NW |
859 | { /* UK Inspiron 6400 */ |
860 | .ident = "Dell Inspiron 3", | |
861 | .matches = { | |
862 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
863 | DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), | |
864 | }, | |
865 | }, | |
48103c52 FS |
866 | { |
867 | .ident = "Dell Inspiron 3", | |
868 | .matches = { | |
869 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
870 | DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), | |
871 | }, | |
872 | }, | |
7b883446 GR |
873 | { |
874 | .ident = "Dell Precision 490", | |
875 | .matches = { | |
876 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
877 | DMI_MATCH(DMI_PRODUCT_NAME, | |
878 | "Precision WorkStation 490"), | |
879 | }, | |
880 | .driver_data = (void *)&i8k_config_data[DELL_PRECISION_490], | |
881 | }, | |
7ab21a86 AS |
882 | { |
883 | .ident = "Dell Precision", | |
884 | .matches = { | |
885 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
886 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), | |
887 | }, | |
888 | }, | |
bef2a508 FH |
889 | { |
890 | .ident = "Dell Vostro", | |
891 | .matches = { | |
892 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
893 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), | |
894 | }, | |
895 | }, | |
9aa5b018 AC |
896 | { |
897 | .ident = "Dell XPS421", | |
898 | .matches = { | |
899 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
900 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), | |
901 | }, | |
902 | }, | |
ff457bde GR |
903 | { |
904 | .ident = "Dell Studio", | |
905 | .matches = { | |
906 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
907 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), | |
908 | }, | |
81474fc2 | 909 | .driver_data = (void *)&i8k_config_data[DELL_STUDIO], |
ff457bde | 910 | }, |
34ae40f6 GR |
911 | { |
912 | .ident = "Dell XPS 13", | |
913 | .matches = { | |
914 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
915 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS13"), | |
916 | }, | |
917 | .driver_data = (void *)&i8k_config_data[DELL_XPS], | |
918 | }, | |
919a0304 GR |
919 | { |
920 | .ident = "Dell XPS M140", | |
921 | .matches = { | |
922 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
923 | DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), | |
924 | }, | |
34ae40f6 | 925 | .driver_data = (void *)&i8k_config_data[DELL_XPS], |
919a0304 | 926 | }, |
12186f51 | 927 | { } |
e70c9d5e | 928 | }; |
1da177e4 | 929 | |
148b1fda PR |
930 | MODULE_DEVICE_TABLE(dmi, i8k_dmi_table); |
931 | ||
1da177e4 LT |
932 | /* |
933 | * Probe for the presence of a supported laptop. | |
934 | */ | |
935 | static int __init i8k_probe(void) | |
936 | { | |
26d09382 | 937 | const struct dmi_system_id *id; |
8f21d8e9 | 938 | int fan, ret; |
dec63ec3 | 939 | |
1da177e4 | 940 | /* |
dec63ec3 | 941 | * Get DMI information |
1da177e4 | 942 | */ |
e70c9d5e DT |
943 | if (!dmi_check_system(i8k_dmi_table)) { |
944 | if (!ignore_dmi && !force) | |
945 | return -ENODEV; | |
946 | ||
60e71aaf GR |
947 | pr_info("not running on a supported Dell system.\n"); |
948 | pr_info("vendor=%s, model=%s, version=%s\n", | |
e70c9d5e DT |
949 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
950 | i8k_get_dmi_data(DMI_PRODUCT_NAME), | |
951 | i8k_get_dmi_data(DMI_BIOS_VERSION)); | |
1da177e4 | 952 | } |
dec63ec3 | 953 | |
12186f51 GR |
954 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), |
955 | sizeof(bios_version)); | |
e70c9d5e | 956 | |
1da177e4 | 957 | /* |
dec63ec3 | 958 | * Get SMM Dell signature |
1da177e4 | 959 | */ |
7e0fa31d DT |
960 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
961 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { | |
60e71aaf | 962 | pr_err("unable to get SMM Dell signature\n"); |
e70c9d5e DT |
963 | if (!force) |
964 | return -ENODEV; | |
1da177e4 | 965 | } |
1da177e4 | 966 | |
8f21d8e9 PR |
967 | /* |
968 | * Set fan multiplier and maximal fan speed from dmi config | |
969 | * Values specified in module parameters override values from dmi | |
970 | */ | |
26d09382 | 971 | id = dmi_first_match(i8k_dmi_table); |
81474fc2 GR |
972 | if (id && id->driver_data) { |
973 | const struct i8k_config_data *conf = id->driver_data; | |
8f21d8e9 PR |
974 | if (!fan_mult && conf->fan_mult) |
975 | fan_mult = conf->fan_mult; | |
976 | if (!fan_max && conf->fan_max) | |
977 | fan_max = conf->fan_max; | |
81474fc2 | 978 | } |
8f21d8e9 PR |
979 | |
980 | i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */ | |
81474fc2 | 981 | i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max); |
26d09382 | 982 | |
8f21d8e9 PR |
983 | if (!fan_mult) { |
984 | /* | |
985 | * Autodetect fan multiplier based on nominal rpm | |
986 | * If fan reports rpm value too high then set multiplier to 1 | |
987 | */ | |
988 | for (fan = 0; fan < 2; ++fan) { | |
989 | ret = i8k_get_fan_nominal_speed(fan, i8k_fan_max); | |
990 | if (ret < 0) | |
991 | continue; | |
992 | if (ret > I8K_FAN_MAX_RPM) | |
993 | i8k_fan_mult = 1; | |
994 | break; | |
995 | } | |
996 | } else { | |
997 | /* Fan multiplier was specified in module param or in dmi */ | |
998 | i8k_fan_mult = fan_mult; | |
999 | } | |
1000 | ||
dec63ec3 | 1001 | return 0; |
1da177e4 LT |
1002 | } |
1003 | ||
8378b924 | 1004 | static int __init i8k_init(void) |
1da177e4 | 1005 | { |
949a9d70 | 1006 | int err; |
dec63ec3 DT |
1007 | |
1008 | /* Are we running on an supported laptop? */ | |
e70c9d5e | 1009 | if (i8k_probe()) |
dec63ec3 | 1010 | return -ENODEV; |
dec63ec3 | 1011 | |
949a9d70 JD |
1012 | err = i8k_init_hwmon(); |
1013 | if (err) | |
039ae585 | 1014 | return err; |
949a9d70 | 1015 | |
039ae585 | 1016 | i8k_init_procfs(); |
dec63ec3 | 1017 | return 0; |
1da177e4 LT |
1018 | } |
1019 | ||
8378b924 | 1020 | static void __exit i8k_exit(void) |
1da177e4 | 1021 | { |
82ba1d3f | 1022 | hwmon_device_unregister(i8k_hwmon_dev); |
039ae585 | 1023 | i8k_exit_procfs(); |
1da177e4 | 1024 | } |
1da177e4 | 1025 | |
8378b924 DT |
1026 | module_init(i8k_init); |
1027 | module_exit(i8k_exit); |