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>"); |
1da177e4 LT |
84 | MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops"); |
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 | ||
90ab5ee9 | 96 | static bool restricted; |
1da177e4 LT |
97 | module_param(restricted, bool, 0); |
98 | MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set"); | |
99 | ||
90ab5ee9 | 100 | static bool power_status; |
1da177e4 LT |
101 | module_param(power_status, bool, 0600); |
102 | MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k"); | |
103 | ||
8f21d8e9 | 104 | static uint fan_mult; |
7f69fb03 | 105 | module_param(fan_mult, uint, 0); |
8f21d8e9 | 106 | MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with (default: autodetect)"); |
4ed99a27 | 107 | |
8f21d8e9 | 108 | static uint fan_max; |
7f69fb03 | 109 | module_param(fan_max, uint, 0); |
8f21d8e9 | 110 | MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed (default: autodetect)"); |
81474fc2 | 111 | |
352f8f8b | 112 | static int i8k_open_fs(struct inode *inode, struct file *file); |
d79b6f4d | 113 | static long i8k_ioctl(struct file *, unsigned int, unsigned long); |
1da177e4 | 114 | |
62322d25 | 115 | static const struct file_operations i8k_fops = { |
1b502217 | 116 | .owner = THIS_MODULE, |
352f8f8b DT |
117 | .open = i8k_open_fs, |
118 | .read = seq_read, | |
119 | .llseek = seq_lseek, | |
120 | .release = single_release, | |
d79b6f4d | 121 | .unlocked_ioctl = i8k_ioctl, |
1da177e4 LT |
122 | }; |
123 | ||
8378b924 | 124 | struct smm_regs { |
dec63ec3 | 125 | unsigned int eax; |
12186f51 GR |
126 | unsigned int ebx __packed; |
127 | unsigned int ecx __packed; | |
128 | unsigned int edx __packed; | |
129 | unsigned int esi __packed; | |
130 | unsigned int edi __packed; | |
8378b924 | 131 | }; |
1da177e4 | 132 | |
1855256c | 133 | static inline const char *i8k_get_dmi_data(int field) |
e70c9d5e | 134 | { |
1855256c | 135 | const char *dmi_data = dmi_get_system_info(field); |
4f005551 DT |
136 | |
137 | return dmi_data && *dmi_data ? dmi_data : "?"; | |
e70c9d5e | 138 | } |
1da177e4 LT |
139 | |
140 | /* | |
141 | * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. | |
142 | */ | |
8378b924 | 143 | static int i8k_smm(struct smm_regs *regs) |
1da177e4 | 144 | { |
dec63ec3 DT |
145 | int rc; |
146 | int eax = regs->eax; | |
f36fdb9f GR |
147 | cpumask_var_t old_mask; |
148 | ||
149 | /* SMM requires CPU 0 */ | |
150 | if (!alloc_cpumask_var(&old_mask, GFP_KERNEL)) | |
151 | return -ENOMEM; | |
152 | cpumask_copy(old_mask, ¤t->cpus_allowed); | |
6d827fbc GR |
153 | rc = set_cpus_allowed_ptr(current, cpumask_of(0)); |
154 | if (rc) | |
155 | goto out; | |
f36fdb9f GR |
156 | if (smp_processor_id() != 0) { |
157 | rc = -EBUSY; | |
158 | goto out; | |
159 | } | |
dec63ec3 | 160 | |
fe04f22f | 161 | #if defined(CONFIG_X86_64) |
22d3243d | 162 | asm volatile("pushq %%rax\n\t" |
fe04f22f BS |
163 | "movl 0(%%rax),%%edx\n\t" |
164 | "pushq %%rdx\n\t" | |
165 | "movl 4(%%rax),%%ebx\n\t" | |
166 | "movl 8(%%rax),%%ecx\n\t" | |
167 | "movl 12(%%rax),%%edx\n\t" | |
168 | "movl 16(%%rax),%%esi\n\t" | |
169 | "movl 20(%%rax),%%edi\n\t" | |
170 | "popq %%rax\n\t" | |
171 | "out %%al,$0xb2\n\t" | |
172 | "out %%al,$0x84\n\t" | |
173 | "xchgq %%rax,(%%rsp)\n\t" | |
174 | "movl %%ebx,4(%%rax)\n\t" | |
175 | "movl %%ecx,8(%%rax)\n\t" | |
176 | "movl %%edx,12(%%rax)\n\t" | |
177 | "movl %%esi,16(%%rax)\n\t" | |
178 | "movl %%edi,20(%%rax)\n\t" | |
179 | "popq %%rdx\n\t" | |
180 | "movl %%edx,0(%%rax)\n\t" | |
bc1f419c LT |
181 | "pushfq\n\t" |
182 | "popq %%rax\n\t" | |
fe04f22f | 183 | "andl $1,%%eax\n" |
12186f51 | 184 | : "=a"(rc) |
fe04f22f BS |
185 | : "a"(regs) |
186 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
187 | #else | |
22d3243d | 188 | asm volatile("pushl %%eax\n\t" |
dec63ec3 DT |
189 | "movl 0(%%eax),%%edx\n\t" |
190 | "push %%edx\n\t" | |
191 | "movl 4(%%eax),%%ebx\n\t" | |
192 | "movl 8(%%eax),%%ecx\n\t" | |
193 | "movl 12(%%eax),%%edx\n\t" | |
194 | "movl 16(%%eax),%%esi\n\t" | |
195 | "movl 20(%%eax),%%edi\n\t" | |
196 | "popl %%eax\n\t" | |
197 | "out %%al,$0xb2\n\t" | |
198 | "out %%al,$0x84\n\t" | |
199 | "xchgl %%eax,(%%esp)\n\t" | |
200 | "movl %%ebx,4(%%eax)\n\t" | |
201 | "movl %%ecx,8(%%eax)\n\t" | |
202 | "movl %%edx,12(%%eax)\n\t" | |
203 | "movl %%esi,16(%%eax)\n\t" | |
204 | "movl %%edi,20(%%eax)\n\t" | |
205 | "popl %%edx\n\t" | |
206 | "movl %%edx,0(%%eax)\n\t" | |
207 | "lahf\n\t" | |
208 | "shrl $8,%%eax\n\t" | |
6b4e81db | 209 | "andl $1,%%eax\n" |
12186f51 | 210 | : "=a"(rc) |
dec63ec3 DT |
211 | : "a"(regs) |
212 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
fe04f22f | 213 | #endif |
8378b924 | 214 | if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
f36fdb9f | 215 | rc = -EINVAL; |
dec63ec3 | 216 | |
f36fdb9f GR |
217 | out: |
218 | set_cpus_allowed_ptr(current, old_mask); | |
219 | free_cpumask_var(old_mask); | |
220 | return rc; | |
1da177e4 LT |
221 | } |
222 | ||
1da177e4 LT |
223 | /* |
224 | * Read the Fn key status. | |
225 | */ | |
226 | static int i8k_get_fn_status(void) | |
227 | { | |
8378b924 | 228 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; |
dec63ec3 DT |
229 | int rc; |
230 | ||
12186f51 GR |
231 | rc = i8k_smm(®s); |
232 | if (rc < 0) | |
dec63ec3 | 233 | return rc; |
dec63ec3 DT |
234 | |
235 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { | |
236 | case I8K_FN_UP: | |
237 | return I8K_VOL_UP; | |
238 | case I8K_FN_DOWN: | |
239 | return I8K_VOL_DOWN; | |
240 | case I8K_FN_MUTE: | |
241 | return I8K_VOL_MUTE; | |
242 | default: | |
243 | return 0; | |
244 | } | |
1da177e4 LT |
245 | } |
246 | ||
247 | /* | |
248 | * Read the power status. | |
249 | */ | |
250 | static int i8k_get_power_status(void) | |
251 | { | |
8378b924 | 252 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; |
dec63ec3 DT |
253 | int rc; |
254 | ||
12186f51 GR |
255 | rc = i8k_smm(®s); |
256 | if (rc < 0) | |
dec63ec3 | 257 | return rc; |
dec63ec3 | 258 | |
8378b924 | 259 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; |
1da177e4 LT |
260 | } |
261 | ||
262 | /* | |
263 | * Read the fan status. | |
264 | */ | |
265 | static int i8k_get_fan_status(int fan) | |
266 | { | |
8378b924 | 267 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
1da177e4 | 268 | |
dec63ec3 | 269 | regs.ebx = fan & 0xff; |
8378b924 | 270 | return i8k_smm(®s) ? : regs.eax & 0xff; |
1da177e4 LT |
271 | } |
272 | ||
273 | /* | |
274 | * Read the fan speed in RPM. | |
275 | */ | |
276 | static int i8k_get_fan_speed(int fan) | |
277 | { | |
8378b924 | 278 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
1da177e4 | 279 | |
dec63ec3 | 280 | regs.ebx = fan & 0xff; |
26d09382 | 281 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; |
1da177e4 LT |
282 | } |
283 | ||
f989e554 PR |
284 | /* |
285 | * Read the fan type. | |
286 | */ | |
287 | static int i8k_get_fan_type(int fan) | |
288 | { | |
289 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN_TYPE, }; | |
290 | ||
291 | regs.ebx = fan & 0xff; | |
292 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
293 | } | |
294 | ||
8f21d8e9 PR |
295 | /* |
296 | * Read the fan nominal rpm for specific fan speed. | |
297 | */ | |
298 | static int i8k_get_fan_nominal_speed(int fan, int speed) | |
299 | { | |
300 | struct smm_regs regs = { .eax = I8K_SMM_GET_NOM_SPEED, }; | |
301 | ||
302 | regs.ebx = (fan & 0xff) | (speed << 8); | |
303 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; | |
304 | } | |
305 | ||
1da177e4 LT |
306 | /* |
307 | * Set the fan speed (off, low, high). Returns the new fan status. | |
308 | */ | |
309 | static int i8k_set_fan(int fan, int speed) | |
310 | { | |
8378b924 | 311 | struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
1da177e4 | 312 | |
81474fc2 | 313 | speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed); |
dec63ec3 | 314 | regs.ebx = (fan & 0xff) | (speed << 8); |
1da177e4 | 315 | |
8378b924 | 316 | return i8k_smm(®s) ? : i8k_get_fan_status(fan); |
1da177e4 LT |
317 | } |
318 | ||
5114b474 PR |
319 | static int i8k_get_temp_type(int sensor) |
320 | { | |
321 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP_TYPE, }; | |
322 | ||
323 | regs.ebx = sensor & 0xff; | |
324 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
325 | } | |
326 | ||
1da177e4 LT |
327 | /* |
328 | * Read the cpu temperature. | |
329 | */ | |
564132d9 | 330 | static int _i8k_get_temp(int sensor) |
1da177e4 | 331 | { |
564132d9 GR |
332 | struct smm_regs regs = { |
333 | .eax = I8K_SMM_GET_TEMP, | |
334 | .ebx = sensor & 0xff, | |
335 | }; | |
1da177e4 | 336 | |
564132d9 GR |
337 | return i8k_smm(®s) ? : regs.eax & 0xff; |
338 | } | |
8378b924 | 339 | |
564132d9 GR |
340 | static int i8k_get_temp(int sensor) |
341 | { | |
342 | int temp = _i8k_get_temp(sensor); | |
1da177e4 | 343 | |
dec63ec3 DT |
344 | /* |
345 | * Sometimes the temperature sensor returns 0x99, which is out of range. | |
564132d9 | 346 | * In this case we retry (once) before returning an error. |
dec63ec3 DT |
347 | # 1003655137 00000058 00005a4b |
348 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees | |
349 | # 1003655139 00000054 00005c52 | |
350 | */ | |
564132d9 GR |
351 | if (temp == 0x99) { |
352 | msleep(100); | |
353 | temp = _i8k_get_temp(sensor); | |
dec63ec3 | 354 | } |
564132d9 GR |
355 | /* |
356 | * Return -ENODATA for all invalid temperatures. | |
357 | * | |
358 | * Known instances are the 0x99 value as seen above as well as | |
359 | * 0xc1 (193), which may be returned when trying to read the GPU | |
360 | * temperature if the system supports a GPU and it is currently | |
361 | * turned off. | |
362 | */ | |
723493ca | 363 | if (temp > I8K_MAX_TEMP) |
83d514d7 | 364 | return -ENODATA; |
1da177e4 | 365 | |
dec63ec3 | 366 | return temp; |
1da177e4 LT |
367 | } |
368 | ||
7e0fa31d | 369 | static int i8k_get_dell_signature(int req_fn) |
1da177e4 | 370 | { |
7e0fa31d | 371 | struct smm_regs regs = { .eax = req_fn, }; |
dec63ec3 | 372 | int rc; |
1da177e4 | 373 | |
12186f51 GR |
374 | rc = i8k_smm(®s); |
375 | if (rc < 0) | |
dec63ec3 | 376 | return rc; |
1da177e4 | 377 | |
8378b924 | 378 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
1da177e4 LT |
379 | } |
380 | ||
d79b6f4d FW |
381 | static int |
382 | i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 383 | { |
e70c9d5e | 384 | int val = 0; |
dec63ec3 DT |
385 | int speed; |
386 | unsigned char buff[16]; | |
387 | int __user *argp = (int __user *)arg; | |
388 | ||
389 | if (!argp) | |
390 | return -EINVAL; | |
391 | ||
392 | switch (cmd) { | |
393 | case I8K_BIOS_VERSION: | |
e551b152 GR |
394 | val = (bios_version[0] << 16) | |
395 | (bios_version[1] << 8) | bios_version[2]; | |
dec63ec3 DT |
396 | break; |
397 | ||
398 | case I8K_MACHINE_ID: | |
399 | memset(buff, 0, 16); | |
12186f51 GR |
400 | strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
401 | sizeof(buff)); | |
dec63ec3 DT |
402 | break; |
403 | ||
404 | case I8K_FN_STATUS: | |
405 | val = i8k_get_fn_status(); | |
406 | break; | |
407 | ||
408 | case I8K_POWER_STATUS: | |
409 | val = i8k_get_power_status(); | |
410 | break; | |
411 | ||
412 | case I8K_GET_TEMP: | |
7e0fa31d | 413 | val = i8k_get_temp(0); |
dec63ec3 DT |
414 | break; |
415 | ||
416 | case I8K_GET_SPEED: | |
8378b924 | 417 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 418 | return -EFAULT; |
8378b924 | 419 | |
dec63ec3 DT |
420 | val = i8k_get_fan_speed(val); |
421 | break; | |
1da177e4 | 422 | |
dec63ec3 | 423 | case I8K_GET_FAN: |
8378b924 | 424 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 425 | return -EFAULT; |
8378b924 | 426 | |
dec63ec3 DT |
427 | val = i8k_get_fan_status(val); |
428 | break; | |
1da177e4 | 429 | |
dec63ec3 | 430 | case I8K_SET_FAN: |
8378b924 | 431 | if (restricted && !capable(CAP_SYS_ADMIN)) |
dec63ec3 | 432 | return -EPERM; |
8378b924 DT |
433 | |
434 | if (copy_from_user(&val, argp, sizeof(int))) | |
dec63ec3 | 435 | return -EFAULT; |
8378b924 DT |
436 | |
437 | if (copy_from_user(&speed, argp + 1, sizeof(int))) | |
dec63ec3 | 438 | return -EFAULT; |
8378b924 | 439 | |
dec63ec3 DT |
440 | val = i8k_set_fan(val, speed); |
441 | break; | |
1da177e4 | 442 | |
dec63ec3 DT |
443 | default: |
444 | return -EINVAL; | |
1da177e4 | 445 | } |
1da177e4 | 446 | |
8378b924 | 447 | if (val < 0) |
dec63ec3 | 448 | return val; |
1da177e4 | 449 | |
dec63ec3 DT |
450 | switch (cmd) { |
451 | case I8K_BIOS_VERSION: | |
8378b924 | 452 | if (copy_to_user(argp, &val, 4)) |
dec63ec3 | 453 | return -EFAULT; |
8378b924 | 454 | |
dec63ec3 DT |
455 | break; |
456 | case I8K_MACHINE_ID: | |
8378b924 | 457 | if (copy_to_user(argp, buff, 16)) |
dec63ec3 | 458 | return -EFAULT; |
8378b924 | 459 | |
dec63ec3 DT |
460 | break; |
461 | default: | |
8378b924 | 462 | if (copy_to_user(argp, &val, sizeof(int))) |
dec63ec3 | 463 | return -EFAULT; |
8378b924 | 464 | |
dec63ec3 | 465 | break; |
1da177e4 | 466 | } |
1da177e4 | 467 | |
dec63ec3 | 468 | return 0; |
1da177e4 LT |
469 | } |
470 | ||
d79b6f4d FW |
471 | static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
472 | { | |
473 | long ret; | |
474 | ||
613655fa | 475 | mutex_lock(&i8k_mutex); |
d79b6f4d | 476 | ret = i8k_ioctl_unlocked(fp, cmd, arg); |
613655fa | 477 | mutex_unlock(&i8k_mutex); |
d79b6f4d FW |
478 | |
479 | return ret; | |
480 | } | |
481 | ||
1da177e4 LT |
482 | /* |
483 | * Print the information for /proc/i8k. | |
484 | */ | |
352f8f8b | 485 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
1da177e4 | 486 | { |
352f8f8b | 487 | int fn_key, cpu_temp, ac_power; |
dec63ec3 DT |
488 | int left_fan, right_fan, left_speed, right_speed; |
489 | ||
96de0e25 JE |
490 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
491 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ | |
492 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ | |
493 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ | |
494 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ | |
495 | fn_key = i8k_get_fn_status(); /* 750 µs */ | |
8378b924 | 496 | if (power_status) |
96de0e25 | 497 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
8378b924 | 498 | else |
dec63ec3 | 499 | ac_power = -1; |
dec63ec3 DT |
500 | |
501 | /* | |
502 | * Info: | |
503 | * | |
504 | * 1) Format version (this will change if format changes) | |
505 | * 2) BIOS version | |
506 | * 3) BIOS machine ID | |
507 | * 4) Cpu temperature | |
508 | * 5) Left fan status | |
509 | * 6) Right fan status | |
510 | * 7) Left fan speed | |
511 | * 8) Right fan speed | |
512 | * 9) AC power | |
513 | * 10) Fn Key status | |
514 | */ | |
3a267d3b JP |
515 | seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
516 | I8K_PROC_FMT, | |
517 | bios_version, | |
518 | i8k_get_dmi_data(DMI_PRODUCT_SERIAL), | |
519 | cpu_temp, | |
520 | left_fan, right_fan, left_speed, right_speed, | |
521 | ac_power, fn_key); | |
522 | ||
523 | return 0; | |
1da177e4 LT |
524 | } |
525 | ||
352f8f8b | 526 | static int i8k_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 527 | { |
352f8f8b | 528 | return single_open(file, i8k_proc_show, NULL); |
1da177e4 LT |
529 | } |
530 | ||
949a9d70 JD |
531 | |
532 | /* | |
533 | * Hwmon interface | |
534 | */ | |
535 | ||
5114b474 PR |
536 | static ssize_t i8k_hwmon_show_temp_label(struct device *dev, |
537 | struct device_attribute *devattr, | |
538 | char *buf) | |
539 | { | |
540 | static const char * const labels[] = { | |
541 | "CPU", | |
542 | "GPU", | |
543 | "SODIMM", | |
544 | "Other", | |
545 | "Ambient", | |
546 | "Other", | |
547 | }; | |
548 | int index = to_sensor_dev_attr(devattr)->index; | |
549 | int type; | |
550 | ||
551 | type = i8k_get_temp_type(index); | |
552 | if (type < 0) | |
553 | return type; | |
554 | if (type >= ARRAY_SIZE(labels)) | |
555 | type = ARRAY_SIZE(labels) - 1; | |
556 | return sprintf(buf, "%s\n", labels[type]); | |
557 | } | |
558 | ||
949a9d70 JD |
559 | static ssize_t i8k_hwmon_show_temp(struct device *dev, |
560 | struct device_attribute *devattr, | |
561 | char *buf) | |
562 | { | |
d83c39de GR |
563 | int index = to_sensor_dev_attr(devattr)->index; |
564 | int temp; | |
949a9d70 | 565 | |
d83c39de GR |
566 | temp = i8k_get_temp(index); |
567 | if (temp < 0) | |
568 | return temp; | |
569 | return sprintf(buf, "%d\n", temp * 1000); | |
949a9d70 JD |
570 | } |
571 | ||
f989e554 PR |
572 | static ssize_t i8k_hwmon_show_fan_label(struct device *dev, |
573 | struct device_attribute *devattr, | |
574 | char *buf) | |
575 | { | |
576 | static const char * const labels[] = { | |
577 | "Processor Fan", | |
578 | "Motherboard Fan", | |
579 | "Video Fan", | |
580 | "Power Supply Fan", | |
581 | "Chipset Fan", | |
582 | "Other Fan", | |
583 | }; | |
584 | int index = to_sensor_dev_attr(devattr)->index; | |
585 | bool dock = false; | |
586 | int type; | |
587 | ||
588 | type = i8k_get_fan_type(index); | |
589 | if (type < 0) | |
590 | return type; | |
591 | ||
592 | if (type & 0x10) { | |
593 | dock = true; | |
594 | type &= 0x0F; | |
595 | } | |
596 | ||
597 | if (type >= ARRAY_SIZE(labels)) | |
598 | type = (ARRAY_SIZE(labels) - 1); | |
599 | ||
600 | return sprintf(buf, "%s%s\n", (dock ? "Docking " : ""), labels[type]); | |
601 | } | |
602 | ||
949a9d70 JD |
603 | static ssize_t i8k_hwmon_show_fan(struct device *dev, |
604 | struct device_attribute *devattr, | |
605 | char *buf) | |
606 | { | |
607 | int index = to_sensor_dev_attr(devattr)->index; | |
608 | int fan_speed; | |
609 | ||
610 | fan_speed = i8k_get_fan_speed(index); | |
611 | if (fan_speed < 0) | |
612 | return fan_speed; | |
613 | return sprintf(buf, "%d\n", fan_speed); | |
614 | } | |
615 | ||
e7f5f275 GR |
616 | static ssize_t i8k_hwmon_show_pwm(struct device *dev, |
617 | struct device_attribute *devattr, | |
618 | char *buf) | |
619 | { | |
620 | int index = to_sensor_dev_attr(devattr)->index; | |
621 | int status; | |
622 | ||
623 | status = i8k_get_fan_status(index); | |
624 | if (status < 0) | |
625 | return -EIO; | |
81474fc2 | 626 | return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255)); |
e7f5f275 GR |
627 | } |
628 | ||
629 | static ssize_t i8k_hwmon_set_pwm(struct device *dev, | |
630 | struct device_attribute *attr, | |
631 | const char *buf, size_t count) | |
632 | { | |
633 | int index = to_sensor_dev_attr(attr)->index; | |
634 | unsigned long val; | |
635 | int err; | |
636 | ||
637 | err = kstrtoul(buf, 10, &val); | |
638 | if (err) | |
639 | return err; | |
81474fc2 | 640 | val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max); |
e7f5f275 GR |
641 | |
642 | mutex_lock(&i8k_mutex); | |
643 | err = i8k_set_fan(index, val); | |
644 | mutex_unlock(&i8k_mutex); | |
645 | ||
646 | return err < 0 ? -EIO : count; | |
647 | } | |
648 | ||
d83c39de | 649 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0); |
5114b474 PR |
650 | static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
651 | 0); | |
d83c39de | 652 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1); |
5114b474 PR |
653 | static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
654 | 1); | |
d83c39de | 655 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2); |
5114b474 PR |
656 | static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
657 | 2); | |
d83c39de | 658 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 3); |
5114b474 PR |
659 | static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
660 | 3); | |
f989e554 PR |
661 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, 0); |
662 | static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL, | |
663 | 0); | |
e7f5f275 | 664 | static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
f989e554 | 665 | i8k_hwmon_set_pwm, 0); |
949a9d70 | 666 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
f989e554 PR |
667 | 1); |
668 | static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL, | |
669 | 1); | |
e7f5f275 | 670 | static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
f989e554 | 671 | i8k_hwmon_set_pwm, 1); |
82ba1d3f GR |
672 | |
673 | static struct attribute *i8k_attrs[] = { | |
d83c39de | 674 | &sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */ |
5114b474 PR |
675 | &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */ |
676 | &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */ | |
677 | &sensor_dev_attr_temp2_label.dev_attr.attr, /* 3 */ | |
678 | &sensor_dev_attr_temp3_input.dev_attr.attr, /* 4 */ | |
679 | &sensor_dev_attr_temp3_label.dev_attr.attr, /* 5 */ | |
680 | &sensor_dev_attr_temp4_input.dev_attr.attr, /* 6 */ | |
681 | &sensor_dev_attr_temp4_label.dev_attr.attr, /* 7 */ | |
682 | &sensor_dev_attr_fan1_input.dev_attr.attr, /* 8 */ | |
f989e554 PR |
683 | &sensor_dev_attr_fan1_label.dev_attr.attr, /* 9 */ |
684 | &sensor_dev_attr_pwm1.dev_attr.attr, /* 10 */ | |
685 | &sensor_dev_attr_fan2_input.dev_attr.attr, /* 11 */ | |
686 | &sensor_dev_attr_fan2_label.dev_attr.attr, /* 12 */ | |
687 | &sensor_dev_attr_pwm2.dev_attr.attr, /* 13 */ | |
82ba1d3f GR |
688 | NULL |
689 | }; | |
949a9d70 | 690 | |
82ba1d3f GR |
691 | static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, |
692 | int index) | |
949a9d70 | 693 | { |
5114b474 PR |
694 | if (index >= 0 && index <= 1 && |
695 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1)) | |
82ba1d3f | 696 | return 0; |
5114b474 PR |
697 | if (index >= 2 && index <= 3 && |
698 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2)) | |
d83c39de | 699 | return 0; |
5114b474 PR |
700 | if (index >= 4 && index <= 5 && |
701 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3)) | |
d83c39de | 702 | return 0; |
5114b474 PR |
703 | if (index >= 6 && index <= 7 && |
704 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4)) | |
d83c39de | 705 | return 0; |
f989e554 | 706 | if (index >= 8 && index <= 10 && |
82ba1d3f GR |
707 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1)) |
708 | return 0; | |
f989e554 | 709 | if (index >= 11 && index <= 13 && |
82ba1d3f GR |
710 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) |
711 | return 0; | |
712 | ||
713 | return attr->mode; | |
949a9d70 JD |
714 | } |
715 | ||
82ba1d3f GR |
716 | static const struct attribute_group i8k_group = { |
717 | .attrs = i8k_attrs, | |
718 | .is_visible = i8k_is_visible, | |
719 | }; | |
720 | __ATTRIBUTE_GROUPS(i8k); | |
721 | ||
949a9d70 JD |
722 | static int __init i8k_init_hwmon(void) |
723 | { | |
724 | int err; | |
725 | ||
82ba1d3f | 726 | i8k_hwmon_flags = 0; |
949a9d70 | 727 | |
672af223 PR |
728 | /* CPU temperature attributes, if temperature type is OK */ |
729 | err = i8k_get_temp_type(0); | |
730 | if (err >= 0) | |
82ba1d3f | 731 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1; |
d83c39de | 732 | /* check for additional temperature sensors */ |
672af223 PR |
733 | err = i8k_get_temp_type(1); |
734 | if (err >= 0) | |
d83c39de | 735 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2; |
672af223 PR |
736 | err = i8k_get_temp_type(2); |
737 | if (err >= 0) | |
d83c39de | 738 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3; |
672af223 PR |
739 | err = i8k_get_temp_type(3); |
740 | if (err >= 0) | |
d83c39de | 741 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4; |
949a9d70 | 742 | |
f989e554 PR |
743 | /* First fan attributes, if fan type is OK */ |
744 | err = i8k_get_fan_type(0); | |
82ba1d3f GR |
745 | if (err >= 0) |
746 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1; | |
949a9d70 | 747 | |
f989e554 PR |
748 | /* Second fan attributes, if fan type is OK */ |
749 | err = i8k_get_fan_type(1); | |
82ba1d3f GR |
750 | if (err >= 0) |
751 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2; | |
949a9d70 | 752 | |
82ba1d3f GR |
753 | i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "i8k", NULL, |
754 | i8k_groups); | |
755 | if (IS_ERR(i8k_hwmon_dev)) { | |
756 | err = PTR_ERR(i8k_hwmon_dev); | |
757 | i8k_hwmon_dev = NULL; | |
758 | pr_err("hwmon registration failed (%d)\n", err); | |
759 | return err; | |
760 | } | |
949a9d70 | 761 | return 0; |
949a9d70 JD |
762 | } |
763 | ||
81474fc2 | 764 | struct i8k_config_data { |
7f69fb03 PR |
765 | uint fan_mult; |
766 | uint fan_max; | |
81474fc2 GR |
767 | }; |
768 | ||
769 | enum i8k_configs { | |
7b883446 GR |
770 | DELL_LATITUDE_D520, |
771 | DELL_PRECISION_490, | |
81474fc2 | 772 | DELL_STUDIO, |
34ae40f6 | 773 | DELL_XPS, |
81474fc2 GR |
774 | }; |
775 | ||
776 | static const struct i8k_config_data i8k_config_data[] = { | |
7b883446 GR |
777 | [DELL_LATITUDE_D520] = { |
778 | .fan_mult = 1, | |
779 | .fan_max = I8K_FAN_TURBO, | |
780 | }, | |
781 | [DELL_PRECISION_490] = { | |
782 | .fan_mult = 1, | |
783 | .fan_max = I8K_FAN_TURBO, | |
784 | }, | |
81474fc2 GR |
785 | [DELL_STUDIO] = { |
786 | .fan_mult = 1, | |
787 | .fan_max = I8K_FAN_HIGH, | |
788 | }, | |
34ae40f6 | 789 | [DELL_XPS] = { |
81474fc2 GR |
790 | .fan_mult = 1, |
791 | .fan_max = I8K_FAN_HIGH, | |
792 | }, | |
793 | }; | |
794 | ||
12186f51 | 795 | static struct dmi_system_id i8k_dmi_table[] __initdata = { |
e70c9d5e DT |
796 | { |
797 | .ident = "Dell Inspiron", | |
798 | .matches = { | |
799 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
800 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
801 | }, | |
802 | }, | |
803 | { | |
804 | .ident = "Dell Latitude", | |
805 | .matches = { | |
806 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
807 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
808 | }, | |
809 | }, | |
7e0fa31d DT |
810 | { |
811 | .ident = "Dell Inspiron 2", | |
812 | .matches = { | |
813 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
814 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
815 | }, | |
816 | }, | |
7b883446 GR |
817 | { |
818 | .ident = "Dell Latitude D520", | |
819 | .matches = { | |
820 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
821 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"), | |
822 | }, | |
823 | .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520], | |
824 | }, | |
7e0fa31d DT |
825 | { |
826 | .ident = "Dell Latitude 2", | |
827 | .matches = { | |
828 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
829 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
830 | }, | |
831 | }, | |
a9000d03 NW |
832 | { /* UK Inspiron 6400 */ |
833 | .ident = "Dell Inspiron 3", | |
834 | .matches = { | |
835 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
836 | DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), | |
837 | }, | |
838 | }, | |
48103c52 FS |
839 | { |
840 | .ident = "Dell Inspiron 3", | |
841 | .matches = { | |
842 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
843 | DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), | |
844 | }, | |
845 | }, | |
7b883446 GR |
846 | { |
847 | .ident = "Dell Precision 490", | |
848 | .matches = { | |
849 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
850 | DMI_MATCH(DMI_PRODUCT_NAME, | |
851 | "Precision WorkStation 490"), | |
852 | }, | |
853 | .driver_data = (void *)&i8k_config_data[DELL_PRECISION_490], | |
854 | }, | |
7ab21a86 AS |
855 | { |
856 | .ident = "Dell Precision", | |
857 | .matches = { | |
858 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
859 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), | |
860 | }, | |
861 | }, | |
bef2a508 FH |
862 | { |
863 | .ident = "Dell Vostro", | |
864 | .matches = { | |
865 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
866 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), | |
867 | }, | |
868 | }, | |
9aa5b018 AC |
869 | { |
870 | .ident = "Dell XPS421", | |
871 | .matches = { | |
872 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
873 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), | |
874 | }, | |
875 | }, | |
ff457bde GR |
876 | { |
877 | .ident = "Dell Studio", | |
878 | .matches = { | |
879 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
880 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), | |
881 | }, | |
81474fc2 | 882 | .driver_data = (void *)&i8k_config_data[DELL_STUDIO], |
ff457bde | 883 | }, |
34ae40f6 GR |
884 | { |
885 | .ident = "Dell XPS 13", | |
886 | .matches = { | |
887 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
888 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS13"), | |
889 | }, | |
890 | .driver_data = (void *)&i8k_config_data[DELL_XPS], | |
891 | }, | |
919a0304 GR |
892 | { |
893 | .ident = "Dell XPS M140", | |
894 | .matches = { | |
895 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
896 | DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), | |
897 | }, | |
34ae40f6 | 898 | .driver_data = (void *)&i8k_config_data[DELL_XPS], |
919a0304 | 899 | }, |
12186f51 | 900 | { } |
e70c9d5e | 901 | }; |
1da177e4 | 902 | |
148b1fda PR |
903 | MODULE_DEVICE_TABLE(dmi, i8k_dmi_table); |
904 | ||
1da177e4 LT |
905 | /* |
906 | * Probe for the presence of a supported laptop. | |
907 | */ | |
908 | static int __init i8k_probe(void) | |
909 | { | |
26d09382 | 910 | const struct dmi_system_id *id; |
8f21d8e9 | 911 | int fan, ret; |
dec63ec3 | 912 | |
1da177e4 | 913 | /* |
dec63ec3 | 914 | * Get DMI information |
1da177e4 | 915 | */ |
e70c9d5e DT |
916 | if (!dmi_check_system(i8k_dmi_table)) { |
917 | if (!ignore_dmi && !force) | |
918 | return -ENODEV; | |
919 | ||
60e71aaf GR |
920 | pr_info("not running on a supported Dell system.\n"); |
921 | pr_info("vendor=%s, model=%s, version=%s\n", | |
e70c9d5e DT |
922 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
923 | i8k_get_dmi_data(DMI_PRODUCT_NAME), | |
924 | i8k_get_dmi_data(DMI_BIOS_VERSION)); | |
1da177e4 | 925 | } |
dec63ec3 | 926 | |
12186f51 GR |
927 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), |
928 | sizeof(bios_version)); | |
e70c9d5e | 929 | |
1da177e4 | 930 | /* |
dec63ec3 | 931 | * Get SMM Dell signature |
1da177e4 | 932 | */ |
7e0fa31d DT |
933 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
934 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { | |
60e71aaf | 935 | pr_err("unable to get SMM Dell signature\n"); |
e70c9d5e DT |
936 | if (!force) |
937 | return -ENODEV; | |
1da177e4 | 938 | } |
1da177e4 | 939 | |
8f21d8e9 PR |
940 | /* |
941 | * Set fan multiplier and maximal fan speed from dmi config | |
942 | * Values specified in module parameters override values from dmi | |
943 | */ | |
26d09382 | 944 | id = dmi_first_match(i8k_dmi_table); |
81474fc2 GR |
945 | if (id && id->driver_data) { |
946 | const struct i8k_config_data *conf = id->driver_data; | |
8f21d8e9 PR |
947 | if (!fan_mult && conf->fan_mult) |
948 | fan_mult = conf->fan_mult; | |
949 | if (!fan_max && conf->fan_max) | |
950 | fan_max = conf->fan_max; | |
81474fc2 | 951 | } |
8f21d8e9 PR |
952 | |
953 | i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */ | |
81474fc2 | 954 | i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max); |
26d09382 | 955 | |
8f21d8e9 PR |
956 | if (!fan_mult) { |
957 | /* | |
958 | * Autodetect fan multiplier based on nominal rpm | |
959 | * If fan reports rpm value too high then set multiplier to 1 | |
960 | */ | |
961 | for (fan = 0; fan < 2; ++fan) { | |
962 | ret = i8k_get_fan_nominal_speed(fan, i8k_fan_max); | |
963 | if (ret < 0) | |
964 | continue; | |
965 | if (ret > I8K_FAN_MAX_RPM) | |
966 | i8k_fan_mult = 1; | |
967 | break; | |
968 | } | |
969 | } else { | |
970 | /* Fan multiplier was specified in module param or in dmi */ | |
971 | i8k_fan_mult = fan_mult; | |
972 | } | |
973 | ||
dec63ec3 | 974 | return 0; |
1da177e4 LT |
975 | } |
976 | ||
8378b924 | 977 | static int __init i8k_init(void) |
1da177e4 | 978 | { |
dec63ec3 | 979 | struct proc_dir_entry *proc_i8k; |
949a9d70 | 980 | int err; |
dec63ec3 DT |
981 | |
982 | /* Are we running on an supported laptop? */ | |
e70c9d5e | 983 | if (i8k_probe()) |
dec63ec3 | 984 | return -ENODEV; |
dec63ec3 DT |
985 | |
986 | /* Register the proc entry */ | |
1b502217 | 987 | proc_i8k = proc_create("i8k", 0, NULL, &i8k_fops); |
352f8f8b | 988 | if (!proc_i8k) |
dec63ec3 | 989 | return -ENOENT; |
352f8f8b | 990 | |
949a9d70 JD |
991 | err = i8k_init_hwmon(); |
992 | if (err) | |
993 | goto exit_remove_proc; | |
994 | ||
dec63ec3 | 995 | return 0; |
949a9d70 JD |
996 | |
997 | exit_remove_proc: | |
998 | remove_proc_entry("i8k", NULL); | |
999 | return err; | |
1da177e4 LT |
1000 | } |
1001 | ||
8378b924 | 1002 | static void __exit i8k_exit(void) |
1da177e4 | 1003 | { |
82ba1d3f | 1004 | hwmon_device_unregister(i8k_hwmon_dev); |
dec63ec3 | 1005 | remove_proc_entry("i8k", NULL); |
1da177e4 | 1006 | } |
1da177e4 | 1007 | |
8378b924 DT |
1008 | module_init(i8k_init); |
1009 | module_exit(i8k_exit); |