Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * i8k.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> |
8f21d8e9 | 9 | * Copyright (C) 2014 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)"); | |
83 | MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops"); | |
84 | MODULE_LICENSE("GPL"); | |
85 | ||
90ab5ee9 | 86 | static bool force; |
1da177e4 LT |
87 | module_param(force, bool, 0); |
88 | MODULE_PARM_DESC(force, "Force loading without checking for supported models"); | |
89 | ||
90ab5ee9 | 90 | static bool ignore_dmi; |
e70c9d5e DT |
91 | module_param(ignore_dmi, bool, 0); |
92 | MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); | |
93 | ||
90ab5ee9 | 94 | static bool restricted; |
1da177e4 LT |
95 | module_param(restricted, bool, 0); |
96 | MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set"); | |
97 | ||
90ab5ee9 | 98 | static bool power_status; |
1da177e4 LT |
99 | module_param(power_status, bool, 0600); |
100 | MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k"); | |
101 | ||
8f21d8e9 | 102 | static uint fan_mult; |
7f69fb03 | 103 | module_param(fan_mult, uint, 0); |
8f21d8e9 | 104 | MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with (default: autodetect)"); |
4ed99a27 | 105 | |
8f21d8e9 | 106 | static uint fan_max; |
7f69fb03 | 107 | module_param(fan_max, uint, 0); |
8f21d8e9 | 108 | MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed (default: autodetect)"); |
81474fc2 | 109 | |
352f8f8b | 110 | static int i8k_open_fs(struct inode *inode, struct file *file); |
d79b6f4d | 111 | static long i8k_ioctl(struct file *, unsigned int, unsigned long); |
1da177e4 | 112 | |
62322d25 | 113 | static const struct file_operations i8k_fops = { |
1b502217 | 114 | .owner = THIS_MODULE, |
352f8f8b DT |
115 | .open = i8k_open_fs, |
116 | .read = seq_read, | |
117 | .llseek = seq_lseek, | |
118 | .release = single_release, | |
d79b6f4d | 119 | .unlocked_ioctl = i8k_ioctl, |
1da177e4 LT |
120 | }; |
121 | ||
8378b924 | 122 | struct smm_regs { |
dec63ec3 | 123 | unsigned int eax; |
12186f51 GR |
124 | unsigned int ebx __packed; |
125 | unsigned int ecx __packed; | |
126 | unsigned int edx __packed; | |
127 | unsigned int esi __packed; | |
128 | unsigned int edi __packed; | |
8378b924 | 129 | }; |
1da177e4 | 130 | |
1855256c | 131 | static inline const char *i8k_get_dmi_data(int field) |
e70c9d5e | 132 | { |
1855256c | 133 | const char *dmi_data = dmi_get_system_info(field); |
4f005551 DT |
134 | |
135 | return dmi_data && *dmi_data ? dmi_data : "?"; | |
e70c9d5e | 136 | } |
1da177e4 LT |
137 | |
138 | /* | |
139 | * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. | |
140 | */ | |
8378b924 | 141 | static int i8k_smm(struct smm_regs *regs) |
1da177e4 | 142 | { |
dec63ec3 DT |
143 | int rc; |
144 | int eax = regs->eax; | |
f36fdb9f GR |
145 | cpumask_var_t old_mask; |
146 | ||
147 | /* SMM requires CPU 0 */ | |
148 | if (!alloc_cpumask_var(&old_mask, GFP_KERNEL)) | |
149 | return -ENOMEM; | |
150 | cpumask_copy(old_mask, ¤t->cpus_allowed); | |
6d827fbc GR |
151 | rc = set_cpus_allowed_ptr(current, cpumask_of(0)); |
152 | if (rc) | |
153 | goto out; | |
f36fdb9f GR |
154 | if (smp_processor_id() != 0) { |
155 | rc = -EBUSY; | |
156 | goto out; | |
157 | } | |
dec63ec3 | 158 | |
fe04f22f | 159 | #if defined(CONFIG_X86_64) |
22d3243d | 160 | asm volatile("pushq %%rax\n\t" |
fe04f22f BS |
161 | "movl 0(%%rax),%%edx\n\t" |
162 | "pushq %%rdx\n\t" | |
163 | "movl 4(%%rax),%%ebx\n\t" | |
164 | "movl 8(%%rax),%%ecx\n\t" | |
165 | "movl 12(%%rax),%%edx\n\t" | |
166 | "movl 16(%%rax),%%esi\n\t" | |
167 | "movl 20(%%rax),%%edi\n\t" | |
168 | "popq %%rax\n\t" | |
169 | "out %%al,$0xb2\n\t" | |
170 | "out %%al,$0x84\n\t" | |
171 | "xchgq %%rax,(%%rsp)\n\t" | |
172 | "movl %%ebx,4(%%rax)\n\t" | |
173 | "movl %%ecx,8(%%rax)\n\t" | |
174 | "movl %%edx,12(%%rax)\n\t" | |
175 | "movl %%esi,16(%%rax)\n\t" | |
176 | "movl %%edi,20(%%rax)\n\t" | |
177 | "popq %%rdx\n\t" | |
178 | "movl %%edx,0(%%rax)\n\t" | |
bc1f419c LT |
179 | "pushfq\n\t" |
180 | "popq %%rax\n\t" | |
fe04f22f | 181 | "andl $1,%%eax\n" |
12186f51 | 182 | : "=a"(rc) |
fe04f22f BS |
183 | : "a"(regs) |
184 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
185 | #else | |
22d3243d | 186 | asm volatile("pushl %%eax\n\t" |
dec63ec3 DT |
187 | "movl 0(%%eax),%%edx\n\t" |
188 | "push %%edx\n\t" | |
189 | "movl 4(%%eax),%%ebx\n\t" | |
190 | "movl 8(%%eax),%%ecx\n\t" | |
191 | "movl 12(%%eax),%%edx\n\t" | |
192 | "movl 16(%%eax),%%esi\n\t" | |
193 | "movl 20(%%eax),%%edi\n\t" | |
194 | "popl %%eax\n\t" | |
195 | "out %%al,$0xb2\n\t" | |
196 | "out %%al,$0x84\n\t" | |
197 | "xchgl %%eax,(%%esp)\n\t" | |
198 | "movl %%ebx,4(%%eax)\n\t" | |
199 | "movl %%ecx,8(%%eax)\n\t" | |
200 | "movl %%edx,12(%%eax)\n\t" | |
201 | "movl %%esi,16(%%eax)\n\t" | |
202 | "movl %%edi,20(%%eax)\n\t" | |
203 | "popl %%edx\n\t" | |
204 | "movl %%edx,0(%%eax)\n\t" | |
205 | "lahf\n\t" | |
206 | "shrl $8,%%eax\n\t" | |
6b4e81db | 207 | "andl $1,%%eax\n" |
12186f51 | 208 | : "=a"(rc) |
dec63ec3 DT |
209 | : "a"(regs) |
210 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
fe04f22f | 211 | #endif |
8378b924 | 212 | if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
f36fdb9f | 213 | rc = -EINVAL; |
dec63ec3 | 214 | |
f36fdb9f GR |
215 | out: |
216 | set_cpus_allowed_ptr(current, old_mask); | |
217 | free_cpumask_var(old_mask); | |
218 | return rc; | |
1da177e4 LT |
219 | } |
220 | ||
1da177e4 LT |
221 | /* |
222 | * Read the Fn key status. | |
223 | */ | |
224 | static int i8k_get_fn_status(void) | |
225 | { | |
8378b924 | 226 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; |
dec63ec3 DT |
227 | int rc; |
228 | ||
12186f51 GR |
229 | rc = i8k_smm(®s); |
230 | if (rc < 0) | |
dec63ec3 | 231 | return rc; |
dec63ec3 DT |
232 | |
233 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { | |
234 | case I8K_FN_UP: | |
235 | return I8K_VOL_UP; | |
236 | case I8K_FN_DOWN: | |
237 | return I8K_VOL_DOWN; | |
238 | case I8K_FN_MUTE: | |
239 | return I8K_VOL_MUTE; | |
240 | default: | |
241 | return 0; | |
242 | } | |
1da177e4 LT |
243 | } |
244 | ||
245 | /* | |
246 | * Read the power status. | |
247 | */ | |
248 | static int i8k_get_power_status(void) | |
249 | { | |
8378b924 | 250 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; |
dec63ec3 DT |
251 | int rc; |
252 | ||
12186f51 GR |
253 | rc = i8k_smm(®s); |
254 | if (rc < 0) | |
dec63ec3 | 255 | return rc; |
dec63ec3 | 256 | |
8378b924 | 257 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; |
1da177e4 LT |
258 | } |
259 | ||
260 | /* | |
261 | * Read the fan status. | |
262 | */ | |
263 | static int i8k_get_fan_status(int fan) | |
264 | { | |
8378b924 | 265 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
1da177e4 | 266 | |
dec63ec3 | 267 | regs.ebx = fan & 0xff; |
8378b924 | 268 | return i8k_smm(®s) ? : regs.eax & 0xff; |
1da177e4 LT |
269 | } |
270 | ||
271 | /* | |
272 | * Read the fan speed in RPM. | |
273 | */ | |
274 | static int i8k_get_fan_speed(int fan) | |
275 | { | |
8378b924 | 276 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
1da177e4 | 277 | |
dec63ec3 | 278 | regs.ebx = fan & 0xff; |
26d09382 | 279 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; |
1da177e4 LT |
280 | } |
281 | ||
f989e554 PR |
282 | /* |
283 | * Read the fan type. | |
284 | */ | |
285 | static int i8k_get_fan_type(int fan) | |
286 | { | |
287 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN_TYPE, }; | |
288 | ||
289 | regs.ebx = fan & 0xff; | |
290 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
291 | } | |
292 | ||
8f21d8e9 PR |
293 | /* |
294 | * Read the fan nominal rpm for specific fan speed. | |
295 | */ | |
296 | static int i8k_get_fan_nominal_speed(int fan, int speed) | |
297 | { | |
298 | struct smm_regs regs = { .eax = I8K_SMM_GET_NOM_SPEED, }; | |
299 | ||
300 | regs.ebx = (fan & 0xff) | (speed << 8); | |
301 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; | |
302 | } | |
303 | ||
1da177e4 LT |
304 | /* |
305 | * Set the fan speed (off, low, high). Returns the new fan status. | |
306 | */ | |
307 | static int i8k_set_fan(int fan, int speed) | |
308 | { | |
8378b924 | 309 | struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
1da177e4 | 310 | |
81474fc2 | 311 | speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed); |
dec63ec3 | 312 | regs.ebx = (fan & 0xff) | (speed << 8); |
1da177e4 | 313 | |
8378b924 | 314 | return i8k_smm(®s) ? : i8k_get_fan_status(fan); |
1da177e4 LT |
315 | } |
316 | ||
5114b474 PR |
317 | static int i8k_get_temp_type(int sensor) |
318 | { | |
319 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP_TYPE, }; | |
320 | ||
321 | regs.ebx = sensor & 0xff; | |
322 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
323 | } | |
324 | ||
1da177e4 LT |
325 | /* |
326 | * Read the cpu temperature. | |
327 | */ | |
564132d9 | 328 | static int _i8k_get_temp(int sensor) |
1da177e4 | 329 | { |
564132d9 GR |
330 | struct smm_regs regs = { |
331 | .eax = I8K_SMM_GET_TEMP, | |
332 | .ebx = sensor & 0xff, | |
333 | }; | |
1da177e4 | 334 | |
564132d9 GR |
335 | return i8k_smm(®s) ? : regs.eax & 0xff; |
336 | } | |
8378b924 | 337 | |
564132d9 GR |
338 | static int i8k_get_temp(int sensor) |
339 | { | |
340 | int temp = _i8k_get_temp(sensor); | |
1da177e4 | 341 | |
dec63ec3 DT |
342 | /* |
343 | * Sometimes the temperature sensor returns 0x99, which is out of range. | |
564132d9 | 344 | * In this case we retry (once) before returning an error. |
dec63ec3 DT |
345 | # 1003655137 00000058 00005a4b |
346 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees | |
347 | # 1003655139 00000054 00005c52 | |
348 | */ | |
564132d9 GR |
349 | if (temp == 0x99) { |
350 | msleep(100); | |
351 | temp = _i8k_get_temp(sensor); | |
dec63ec3 | 352 | } |
564132d9 GR |
353 | /* |
354 | * Return -ENODATA for all invalid temperatures. | |
355 | * | |
356 | * Known instances are the 0x99 value as seen above as well as | |
357 | * 0xc1 (193), which may be returned when trying to read the GPU | |
358 | * temperature if the system supports a GPU and it is currently | |
359 | * turned off. | |
360 | */ | |
723493ca | 361 | if (temp > I8K_MAX_TEMP) |
83d514d7 | 362 | return -ENODATA; |
1da177e4 | 363 | |
dec63ec3 | 364 | return temp; |
1da177e4 LT |
365 | } |
366 | ||
7e0fa31d | 367 | static int i8k_get_dell_signature(int req_fn) |
1da177e4 | 368 | { |
7e0fa31d | 369 | struct smm_regs regs = { .eax = req_fn, }; |
dec63ec3 | 370 | int rc; |
1da177e4 | 371 | |
12186f51 GR |
372 | rc = i8k_smm(®s); |
373 | if (rc < 0) | |
dec63ec3 | 374 | return rc; |
1da177e4 | 375 | |
8378b924 | 376 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
1da177e4 LT |
377 | } |
378 | ||
d79b6f4d FW |
379 | static int |
380 | i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 381 | { |
e70c9d5e | 382 | int val = 0; |
dec63ec3 DT |
383 | int speed; |
384 | unsigned char buff[16]; | |
385 | int __user *argp = (int __user *)arg; | |
386 | ||
387 | if (!argp) | |
388 | return -EINVAL; | |
389 | ||
390 | switch (cmd) { | |
391 | case I8K_BIOS_VERSION: | |
e551b152 GR |
392 | val = (bios_version[0] << 16) | |
393 | (bios_version[1] << 8) | bios_version[2]; | |
dec63ec3 DT |
394 | break; |
395 | ||
396 | case I8K_MACHINE_ID: | |
397 | memset(buff, 0, 16); | |
12186f51 GR |
398 | strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
399 | sizeof(buff)); | |
dec63ec3 DT |
400 | break; |
401 | ||
402 | case I8K_FN_STATUS: | |
403 | val = i8k_get_fn_status(); | |
404 | break; | |
405 | ||
406 | case I8K_POWER_STATUS: | |
407 | val = i8k_get_power_status(); | |
408 | break; | |
409 | ||
410 | case I8K_GET_TEMP: | |
7e0fa31d | 411 | val = i8k_get_temp(0); |
dec63ec3 DT |
412 | break; |
413 | ||
414 | case I8K_GET_SPEED: | |
8378b924 | 415 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 416 | return -EFAULT; |
8378b924 | 417 | |
dec63ec3 DT |
418 | val = i8k_get_fan_speed(val); |
419 | break; | |
1da177e4 | 420 | |
dec63ec3 | 421 | case I8K_GET_FAN: |
8378b924 | 422 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 423 | return -EFAULT; |
8378b924 | 424 | |
dec63ec3 DT |
425 | val = i8k_get_fan_status(val); |
426 | break; | |
1da177e4 | 427 | |
dec63ec3 | 428 | case I8K_SET_FAN: |
8378b924 | 429 | if (restricted && !capable(CAP_SYS_ADMIN)) |
dec63ec3 | 430 | return -EPERM; |
8378b924 DT |
431 | |
432 | if (copy_from_user(&val, argp, sizeof(int))) | |
dec63ec3 | 433 | return -EFAULT; |
8378b924 DT |
434 | |
435 | if (copy_from_user(&speed, argp + 1, sizeof(int))) | |
dec63ec3 | 436 | return -EFAULT; |
8378b924 | 437 | |
dec63ec3 DT |
438 | val = i8k_set_fan(val, speed); |
439 | break; | |
1da177e4 | 440 | |
dec63ec3 DT |
441 | default: |
442 | return -EINVAL; | |
1da177e4 | 443 | } |
1da177e4 | 444 | |
8378b924 | 445 | if (val < 0) |
dec63ec3 | 446 | return val; |
1da177e4 | 447 | |
dec63ec3 DT |
448 | switch (cmd) { |
449 | case I8K_BIOS_VERSION: | |
8378b924 | 450 | if (copy_to_user(argp, &val, 4)) |
dec63ec3 | 451 | return -EFAULT; |
8378b924 | 452 | |
dec63ec3 DT |
453 | break; |
454 | case I8K_MACHINE_ID: | |
8378b924 | 455 | if (copy_to_user(argp, buff, 16)) |
dec63ec3 | 456 | return -EFAULT; |
8378b924 | 457 | |
dec63ec3 DT |
458 | break; |
459 | default: | |
8378b924 | 460 | if (copy_to_user(argp, &val, sizeof(int))) |
dec63ec3 | 461 | return -EFAULT; |
8378b924 | 462 | |
dec63ec3 | 463 | break; |
1da177e4 | 464 | } |
1da177e4 | 465 | |
dec63ec3 | 466 | return 0; |
1da177e4 LT |
467 | } |
468 | ||
d79b6f4d FW |
469 | static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
470 | { | |
471 | long ret; | |
472 | ||
613655fa | 473 | mutex_lock(&i8k_mutex); |
d79b6f4d | 474 | ret = i8k_ioctl_unlocked(fp, cmd, arg); |
613655fa | 475 | mutex_unlock(&i8k_mutex); |
d79b6f4d FW |
476 | |
477 | return ret; | |
478 | } | |
479 | ||
1da177e4 LT |
480 | /* |
481 | * Print the information for /proc/i8k. | |
482 | */ | |
352f8f8b | 483 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
1da177e4 | 484 | { |
352f8f8b | 485 | int fn_key, cpu_temp, ac_power; |
dec63ec3 DT |
486 | int left_fan, right_fan, left_speed, right_speed; |
487 | ||
96de0e25 JE |
488 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
489 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ | |
490 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ | |
491 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ | |
492 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ | |
493 | fn_key = i8k_get_fn_status(); /* 750 µs */ | |
8378b924 | 494 | if (power_status) |
96de0e25 | 495 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
8378b924 | 496 | else |
dec63ec3 | 497 | ac_power = -1; |
dec63ec3 DT |
498 | |
499 | /* | |
500 | * Info: | |
501 | * | |
502 | * 1) Format version (this will change if format changes) | |
503 | * 2) BIOS version | |
504 | * 3) BIOS machine ID | |
505 | * 4) Cpu temperature | |
506 | * 5) Left fan status | |
507 | * 6) Right fan status | |
508 | * 7) Left fan speed | |
509 | * 8) Right fan speed | |
510 | * 9) AC power | |
511 | * 10) Fn Key status | |
512 | */ | |
3a267d3b JP |
513 | seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
514 | I8K_PROC_FMT, | |
515 | bios_version, | |
516 | i8k_get_dmi_data(DMI_PRODUCT_SERIAL), | |
517 | cpu_temp, | |
518 | left_fan, right_fan, left_speed, right_speed, | |
519 | ac_power, fn_key); | |
520 | ||
521 | return 0; | |
1da177e4 LT |
522 | } |
523 | ||
352f8f8b | 524 | static int i8k_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 525 | { |
352f8f8b | 526 | return single_open(file, i8k_proc_show, NULL); |
1da177e4 LT |
527 | } |
528 | ||
949a9d70 JD |
529 | |
530 | /* | |
531 | * Hwmon interface | |
532 | */ | |
533 | ||
5114b474 PR |
534 | static ssize_t i8k_hwmon_show_temp_label(struct device *dev, |
535 | struct device_attribute *devattr, | |
536 | char *buf) | |
537 | { | |
538 | static const char * const labels[] = { | |
539 | "CPU", | |
540 | "GPU", | |
541 | "SODIMM", | |
542 | "Other", | |
543 | "Ambient", | |
544 | "Other", | |
545 | }; | |
546 | int index = to_sensor_dev_attr(devattr)->index; | |
547 | int type; | |
548 | ||
549 | type = i8k_get_temp_type(index); | |
550 | if (type < 0) | |
551 | return type; | |
552 | if (type >= ARRAY_SIZE(labels)) | |
553 | type = ARRAY_SIZE(labels) - 1; | |
554 | return sprintf(buf, "%s\n", labels[type]); | |
555 | } | |
556 | ||
949a9d70 JD |
557 | static ssize_t i8k_hwmon_show_temp(struct device *dev, |
558 | struct device_attribute *devattr, | |
559 | char *buf) | |
560 | { | |
d83c39de GR |
561 | int index = to_sensor_dev_attr(devattr)->index; |
562 | int temp; | |
949a9d70 | 563 | |
d83c39de GR |
564 | temp = i8k_get_temp(index); |
565 | if (temp < 0) | |
566 | return temp; | |
567 | return sprintf(buf, "%d\n", temp * 1000); | |
949a9d70 JD |
568 | } |
569 | ||
f989e554 PR |
570 | static ssize_t i8k_hwmon_show_fan_label(struct device *dev, |
571 | struct device_attribute *devattr, | |
572 | char *buf) | |
573 | { | |
574 | static const char * const labels[] = { | |
575 | "Processor Fan", | |
576 | "Motherboard Fan", | |
577 | "Video Fan", | |
578 | "Power Supply Fan", | |
579 | "Chipset Fan", | |
580 | "Other Fan", | |
581 | }; | |
582 | int index = to_sensor_dev_attr(devattr)->index; | |
583 | bool dock = false; | |
584 | int type; | |
585 | ||
586 | type = i8k_get_fan_type(index); | |
587 | if (type < 0) | |
588 | return type; | |
589 | ||
590 | if (type & 0x10) { | |
591 | dock = true; | |
592 | type &= 0x0F; | |
593 | } | |
594 | ||
595 | if (type >= ARRAY_SIZE(labels)) | |
596 | type = (ARRAY_SIZE(labels) - 1); | |
597 | ||
598 | return sprintf(buf, "%s%s\n", (dock ? "Docking " : ""), labels[type]); | |
599 | } | |
600 | ||
949a9d70 JD |
601 | static ssize_t i8k_hwmon_show_fan(struct device *dev, |
602 | struct device_attribute *devattr, | |
603 | char *buf) | |
604 | { | |
605 | int index = to_sensor_dev_attr(devattr)->index; | |
606 | int fan_speed; | |
607 | ||
608 | fan_speed = i8k_get_fan_speed(index); | |
609 | if (fan_speed < 0) | |
610 | return fan_speed; | |
611 | return sprintf(buf, "%d\n", fan_speed); | |
612 | } | |
613 | ||
e7f5f275 GR |
614 | static ssize_t i8k_hwmon_show_pwm(struct device *dev, |
615 | struct device_attribute *devattr, | |
616 | char *buf) | |
617 | { | |
618 | int index = to_sensor_dev_attr(devattr)->index; | |
619 | int status; | |
620 | ||
621 | status = i8k_get_fan_status(index); | |
622 | if (status < 0) | |
623 | return -EIO; | |
81474fc2 | 624 | return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255)); |
e7f5f275 GR |
625 | } |
626 | ||
627 | static ssize_t i8k_hwmon_set_pwm(struct device *dev, | |
628 | struct device_attribute *attr, | |
629 | const char *buf, size_t count) | |
630 | { | |
631 | int index = to_sensor_dev_attr(attr)->index; | |
632 | unsigned long val; | |
633 | int err; | |
634 | ||
635 | err = kstrtoul(buf, 10, &val); | |
636 | if (err) | |
637 | return err; | |
81474fc2 | 638 | val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max); |
e7f5f275 GR |
639 | |
640 | mutex_lock(&i8k_mutex); | |
641 | err = i8k_set_fan(index, val); | |
642 | mutex_unlock(&i8k_mutex); | |
643 | ||
644 | return err < 0 ? -EIO : count; | |
645 | } | |
646 | ||
d83c39de | 647 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0); |
5114b474 PR |
648 | static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
649 | 0); | |
d83c39de | 650 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1); |
5114b474 PR |
651 | static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
652 | 1); | |
d83c39de | 653 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2); |
5114b474 PR |
654 | static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
655 | 2); | |
d83c39de | 656 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 3); |
5114b474 PR |
657 | static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
658 | 3); | |
f989e554 PR |
659 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, 0); |
660 | static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL, | |
661 | 0); | |
e7f5f275 | 662 | static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
f989e554 | 663 | i8k_hwmon_set_pwm, 0); |
949a9d70 | 664 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
f989e554 PR |
665 | 1); |
666 | static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL, | |
667 | 1); | |
e7f5f275 | 668 | static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
f989e554 | 669 | i8k_hwmon_set_pwm, 1); |
82ba1d3f GR |
670 | |
671 | static struct attribute *i8k_attrs[] = { | |
d83c39de | 672 | &sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */ |
5114b474 PR |
673 | &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */ |
674 | &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */ | |
675 | &sensor_dev_attr_temp2_label.dev_attr.attr, /* 3 */ | |
676 | &sensor_dev_attr_temp3_input.dev_attr.attr, /* 4 */ | |
677 | &sensor_dev_attr_temp3_label.dev_attr.attr, /* 5 */ | |
678 | &sensor_dev_attr_temp4_input.dev_attr.attr, /* 6 */ | |
679 | &sensor_dev_attr_temp4_label.dev_attr.attr, /* 7 */ | |
680 | &sensor_dev_attr_fan1_input.dev_attr.attr, /* 8 */ | |
f989e554 PR |
681 | &sensor_dev_attr_fan1_label.dev_attr.attr, /* 9 */ |
682 | &sensor_dev_attr_pwm1.dev_attr.attr, /* 10 */ | |
683 | &sensor_dev_attr_fan2_input.dev_attr.attr, /* 11 */ | |
684 | &sensor_dev_attr_fan2_label.dev_attr.attr, /* 12 */ | |
685 | &sensor_dev_attr_pwm2.dev_attr.attr, /* 13 */ | |
82ba1d3f GR |
686 | NULL |
687 | }; | |
949a9d70 | 688 | |
82ba1d3f GR |
689 | static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, |
690 | int index) | |
949a9d70 | 691 | { |
5114b474 PR |
692 | if (index >= 0 && index <= 1 && |
693 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1)) | |
82ba1d3f | 694 | return 0; |
5114b474 PR |
695 | if (index >= 2 && index <= 3 && |
696 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2)) | |
d83c39de | 697 | return 0; |
5114b474 PR |
698 | if (index >= 4 && index <= 5 && |
699 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3)) | |
d83c39de | 700 | return 0; |
5114b474 PR |
701 | if (index >= 6 && index <= 7 && |
702 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4)) | |
d83c39de | 703 | return 0; |
f989e554 | 704 | if (index >= 8 && index <= 10 && |
82ba1d3f GR |
705 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1)) |
706 | return 0; | |
f989e554 | 707 | if (index >= 11 && index <= 13 && |
82ba1d3f GR |
708 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) |
709 | return 0; | |
710 | ||
711 | return attr->mode; | |
949a9d70 JD |
712 | } |
713 | ||
82ba1d3f GR |
714 | static const struct attribute_group i8k_group = { |
715 | .attrs = i8k_attrs, | |
716 | .is_visible = i8k_is_visible, | |
717 | }; | |
718 | __ATTRIBUTE_GROUPS(i8k); | |
719 | ||
949a9d70 JD |
720 | static int __init i8k_init_hwmon(void) |
721 | { | |
722 | int err; | |
723 | ||
82ba1d3f | 724 | i8k_hwmon_flags = 0; |
949a9d70 | 725 | |
672af223 PR |
726 | /* CPU temperature attributes, if temperature type is OK */ |
727 | err = i8k_get_temp_type(0); | |
728 | if (err >= 0) | |
82ba1d3f | 729 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1; |
d83c39de | 730 | /* check for additional temperature sensors */ |
672af223 PR |
731 | err = i8k_get_temp_type(1); |
732 | if (err >= 0) | |
d83c39de | 733 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2; |
672af223 PR |
734 | err = i8k_get_temp_type(2); |
735 | if (err >= 0) | |
d83c39de | 736 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3; |
672af223 PR |
737 | err = i8k_get_temp_type(3); |
738 | if (err >= 0) | |
d83c39de | 739 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4; |
949a9d70 | 740 | |
f989e554 PR |
741 | /* First fan attributes, if fan type is OK */ |
742 | err = i8k_get_fan_type(0); | |
82ba1d3f GR |
743 | if (err >= 0) |
744 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1; | |
949a9d70 | 745 | |
f989e554 PR |
746 | /* Second fan attributes, if fan type is OK */ |
747 | err = i8k_get_fan_type(1); | |
82ba1d3f GR |
748 | if (err >= 0) |
749 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2; | |
949a9d70 | 750 | |
82ba1d3f GR |
751 | i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "i8k", NULL, |
752 | i8k_groups); | |
753 | if (IS_ERR(i8k_hwmon_dev)) { | |
754 | err = PTR_ERR(i8k_hwmon_dev); | |
755 | i8k_hwmon_dev = NULL; | |
756 | pr_err("hwmon registration failed (%d)\n", err); | |
757 | return err; | |
758 | } | |
949a9d70 | 759 | return 0; |
949a9d70 JD |
760 | } |
761 | ||
81474fc2 | 762 | struct i8k_config_data { |
7f69fb03 PR |
763 | uint fan_mult; |
764 | uint fan_max; | |
81474fc2 GR |
765 | }; |
766 | ||
767 | enum i8k_configs { | |
7b883446 GR |
768 | DELL_LATITUDE_D520, |
769 | DELL_PRECISION_490, | |
81474fc2 | 770 | DELL_STUDIO, |
34ae40f6 | 771 | DELL_XPS, |
81474fc2 GR |
772 | }; |
773 | ||
774 | static const struct i8k_config_data i8k_config_data[] = { | |
7b883446 GR |
775 | [DELL_LATITUDE_D520] = { |
776 | .fan_mult = 1, | |
777 | .fan_max = I8K_FAN_TURBO, | |
778 | }, | |
779 | [DELL_PRECISION_490] = { | |
780 | .fan_mult = 1, | |
781 | .fan_max = I8K_FAN_TURBO, | |
782 | }, | |
81474fc2 GR |
783 | [DELL_STUDIO] = { |
784 | .fan_mult = 1, | |
785 | .fan_max = I8K_FAN_HIGH, | |
786 | }, | |
34ae40f6 | 787 | [DELL_XPS] = { |
81474fc2 GR |
788 | .fan_mult = 1, |
789 | .fan_max = I8K_FAN_HIGH, | |
790 | }, | |
791 | }; | |
792 | ||
12186f51 | 793 | static struct dmi_system_id i8k_dmi_table[] __initdata = { |
e70c9d5e DT |
794 | { |
795 | .ident = "Dell Inspiron", | |
796 | .matches = { | |
797 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
798 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
799 | }, | |
800 | }, | |
801 | { | |
802 | .ident = "Dell Latitude", | |
803 | .matches = { | |
804 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
805 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
806 | }, | |
807 | }, | |
7e0fa31d DT |
808 | { |
809 | .ident = "Dell Inspiron 2", | |
810 | .matches = { | |
811 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
812 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
813 | }, | |
814 | }, | |
7b883446 GR |
815 | { |
816 | .ident = "Dell Latitude D520", | |
817 | .matches = { | |
818 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
819 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"), | |
820 | }, | |
821 | .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520], | |
822 | }, | |
7e0fa31d DT |
823 | { |
824 | .ident = "Dell Latitude 2", | |
825 | .matches = { | |
826 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
827 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
828 | }, | |
829 | }, | |
a9000d03 NW |
830 | { /* UK Inspiron 6400 */ |
831 | .ident = "Dell Inspiron 3", | |
832 | .matches = { | |
833 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
834 | DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), | |
835 | }, | |
836 | }, | |
48103c52 FS |
837 | { |
838 | .ident = "Dell Inspiron 3", | |
839 | .matches = { | |
840 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
841 | DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), | |
842 | }, | |
843 | }, | |
7b883446 GR |
844 | { |
845 | .ident = "Dell Precision 490", | |
846 | .matches = { | |
847 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
848 | DMI_MATCH(DMI_PRODUCT_NAME, | |
849 | "Precision WorkStation 490"), | |
850 | }, | |
851 | .driver_data = (void *)&i8k_config_data[DELL_PRECISION_490], | |
852 | }, | |
7ab21a86 AS |
853 | { |
854 | .ident = "Dell Precision", | |
855 | .matches = { | |
856 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
857 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), | |
858 | }, | |
859 | }, | |
bef2a508 FH |
860 | { |
861 | .ident = "Dell Vostro", | |
862 | .matches = { | |
863 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
864 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), | |
865 | }, | |
866 | }, | |
9aa5b018 AC |
867 | { |
868 | .ident = "Dell XPS421", | |
869 | .matches = { | |
870 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
871 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), | |
872 | }, | |
873 | }, | |
ff457bde GR |
874 | { |
875 | .ident = "Dell Studio", | |
876 | .matches = { | |
877 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
878 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), | |
879 | }, | |
81474fc2 | 880 | .driver_data = (void *)&i8k_config_data[DELL_STUDIO], |
ff457bde | 881 | }, |
34ae40f6 GR |
882 | { |
883 | .ident = "Dell XPS 13", | |
884 | .matches = { | |
885 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
886 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS13"), | |
887 | }, | |
888 | .driver_data = (void *)&i8k_config_data[DELL_XPS], | |
889 | }, | |
919a0304 GR |
890 | { |
891 | .ident = "Dell XPS M140", | |
892 | .matches = { | |
893 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
894 | DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), | |
895 | }, | |
34ae40f6 | 896 | .driver_data = (void *)&i8k_config_data[DELL_XPS], |
919a0304 | 897 | }, |
12186f51 | 898 | { } |
e70c9d5e | 899 | }; |
1da177e4 | 900 | |
148b1fda PR |
901 | MODULE_DEVICE_TABLE(dmi, i8k_dmi_table); |
902 | ||
1da177e4 LT |
903 | /* |
904 | * Probe for the presence of a supported laptop. | |
905 | */ | |
906 | static int __init i8k_probe(void) | |
907 | { | |
26d09382 | 908 | const struct dmi_system_id *id; |
8f21d8e9 | 909 | int fan, ret; |
dec63ec3 | 910 | |
1da177e4 | 911 | /* |
dec63ec3 | 912 | * Get DMI information |
1da177e4 | 913 | */ |
e70c9d5e DT |
914 | if (!dmi_check_system(i8k_dmi_table)) { |
915 | if (!ignore_dmi && !force) | |
916 | return -ENODEV; | |
917 | ||
60e71aaf GR |
918 | pr_info("not running on a supported Dell system.\n"); |
919 | pr_info("vendor=%s, model=%s, version=%s\n", | |
e70c9d5e DT |
920 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
921 | i8k_get_dmi_data(DMI_PRODUCT_NAME), | |
922 | i8k_get_dmi_data(DMI_BIOS_VERSION)); | |
1da177e4 | 923 | } |
dec63ec3 | 924 | |
12186f51 GR |
925 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), |
926 | sizeof(bios_version)); | |
e70c9d5e | 927 | |
1da177e4 | 928 | /* |
dec63ec3 | 929 | * Get SMM Dell signature |
1da177e4 | 930 | */ |
7e0fa31d DT |
931 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
932 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { | |
60e71aaf | 933 | pr_err("unable to get SMM Dell signature\n"); |
e70c9d5e DT |
934 | if (!force) |
935 | return -ENODEV; | |
1da177e4 | 936 | } |
1da177e4 | 937 | |
8f21d8e9 PR |
938 | /* |
939 | * Set fan multiplier and maximal fan speed from dmi config | |
940 | * Values specified in module parameters override values from dmi | |
941 | */ | |
26d09382 | 942 | id = dmi_first_match(i8k_dmi_table); |
81474fc2 GR |
943 | if (id && id->driver_data) { |
944 | const struct i8k_config_data *conf = id->driver_data; | |
8f21d8e9 PR |
945 | if (!fan_mult && conf->fan_mult) |
946 | fan_mult = conf->fan_mult; | |
947 | if (!fan_max && conf->fan_max) | |
948 | fan_max = conf->fan_max; | |
81474fc2 | 949 | } |
8f21d8e9 PR |
950 | |
951 | i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */ | |
81474fc2 | 952 | i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max); |
26d09382 | 953 | |
8f21d8e9 PR |
954 | if (!fan_mult) { |
955 | /* | |
956 | * Autodetect fan multiplier based on nominal rpm | |
957 | * If fan reports rpm value too high then set multiplier to 1 | |
958 | */ | |
959 | for (fan = 0; fan < 2; ++fan) { | |
960 | ret = i8k_get_fan_nominal_speed(fan, i8k_fan_max); | |
961 | if (ret < 0) | |
962 | continue; | |
963 | if (ret > I8K_FAN_MAX_RPM) | |
964 | i8k_fan_mult = 1; | |
965 | break; | |
966 | } | |
967 | } else { | |
968 | /* Fan multiplier was specified in module param or in dmi */ | |
969 | i8k_fan_mult = fan_mult; | |
970 | } | |
971 | ||
dec63ec3 | 972 | return 0; |
1da177e4 LT |
973 | } |
974 | ||
8378b924 | 975 | static int __init i8k_init(void) |
1da177e4 | 976 | { |
dec63ec3 | 977 | struct proc_dir_entry *proc_i8k; |
949a9d70 | 978 | int err; |
dec63ec3 DT |
979 | |
980 | /* Are we running on an supported laptop? */ | |
e70c9d5e | 981 | if (i8k_probe()) |
dec63ec3 | 982 | return -ENODEV; |
dec63ec3 DT |
983 | |
984 | /* Register the proc entry */ | |
1b502217 | 985 | proc_i8k = proc_create("i8k", 0, NULL, &i8k_fops); |
352f8f8b | 986 | if (!proc_i8k) |
dec63ec3 | 987 | return -ENOENT; |
352f8f8b | 988 | |
949a9d70 JD |
989 | err = i8k_init_hwmon(); |
990 | if (err) | |
991 | goto exit_remove_proc; | |
992 | ||
dec63ec3 | 993 | return 0; |
949a9d70 JD |
994 | |
995 | exit_remove_proc: | |
996 | remove_proc_entry("i8k", NULL); | |
997 | return err; | |
1da177e4 LT |
998 | } |
999 | ||
8378b924 | 1000 | static void __exit i8k_exit(void) |
1da177e4 | 1001 | { |
82ba1d3f | 1002 | hwmon_device_unregister(i8k_hwmon_dev); |
dec63ec3 | 1003 | remove_proc_entry("i8k", NULL); |
1da177e4 | 1004 | } |
1da177e4 | 1005 | |
8378b924 DT |
1006 | module_init(i8k_init); |
1007 | module_exit(i8k_exit); |