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Commit | Line | Data |
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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> |
053ea640 | 38 | #include <linux/ctype.h> |
1da177e4 LT |
39 | |
40 | #include <linux/i8k.h> | |
41 | ||
1da177e4 LT |
42 | #define I8K_SMM_FN_STATUS 0x0025 |
43 | #define I8K_SMM_POWER_STATUS 0x0069 | |
44 | #define I8K_SMM_SET_FAN 0x01a3 | |
45 | #define I8K_SMM_GET_FAN 0x00a3 | |
46 | #define I8K_SMM_GET_SPEED 0x02a3 | |
f989e554 | 47 | #define I8K_SMM_GET_FAN_TYPE 0x03a3 |
8f21d8e9 | 48 | #define I8K_SMM_GET_NOM_SPEED 0x04a3 |
1da177e4 | 49 | #define I8K_SMM_GET_TEMP 0x10a3 |
5114b474 | 50 | #define I8K_SMM_GET_TEMP_TYPE 0x11a3 |
7e0fa31d DT |
51 | #define I8K_SMM_GET_DELL_SIG1 0xfea3 |
52 | #define I8K_SMM_GET_DELL_SIG2 0xffa3 | |
1da177e4 LT |
53 | |
54 | #define I8K_FAN_MULT 30 | |
8f21d8e9 | 55 | #define I8K_FAN_MAX_RPM 30000 |
1da177e4 LT |
56 | #define I8K_MAX_TEMP 127 |
57 | ||
58 | #define I8K_FN_NONE 0x00 | |
59 | #define I8K_FN_UP 0x01 | |
60 | #define I8K_FN_DOWN 0x02 | |
61 | #define I8K_FN_MUTE 0x04 | |
62 | #define I8K_FN_MASK 0x07 | |
63 | #define I8K_FN_SHIFT 8 | |
64 | ||
65 | #define I8K_POWER_AC 0x05 | |
66 | #define I8K_POWER_BATTERY 0x01 | |
67 | ||
613655fa | 68 | static DEFINE_MUTEX(i8k_mutex); |
e70c9d5e | 69 | static char bios_version[4]; |
7613663c | 70 | static char bios_machineid[16]; |
949a9d70 | 71 | static struct device *i8k_hwmon_dev; |
82ba1d3f | 72 | static u32 i8k_hwmon_flags; |
8f21d8e9 | 73 | static uint i8k_fan_mult = I8K_FAN_MULT; |
7f69fb03 PR |
74 | static uint i8k_pwm_mult; |
75 | static uint i8k_fan_max = I8K_FAN_HIGH; | |
2744d2fd | 76 | static bool disallow_fan_type_call; |
82ba1d3f GR |
77 | |
78 | #define I8K_HWMON_HAVE_TEMP1 (1 << 0) | |
d83c39de GR |
79 | #define I8K_HWMON_HAVE_TEMP2 (1 << 1) |
80 | #define I8K_HWMON_HAVE_TEMP3 (1 << 2) | |
81 | #define I8K_HWMON_HAVE_TEMP4 (1 << 3) | |
82 | #define I8K_HWMON_HAVE_FAN1 (1 << 4) | |
83 | #define I8K_HWMON_HAVE_FAN2 (1 << 5) | |
1da177e4 LT |
84 | |
85 | MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); | |
a5afba16 | 86 | MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>"); |
039ae585 | 87 | MODULE_DESCRIPTION("Dell laptop SMM BIOS hwmon driver"); |
1da177e4 | 88 | MODULE_LICENSE("GPL"); |
a5afba16 | 89 | MODULE_ALIAS("i8k"); |
1da177e4 | 90 | |
90ab5ee9 | 91 | static bool force; |
1da177e4 LT |
92 | module_param(force, bool, 0); |
93 | MODULE_PARM_DESC(force, "Force loading without checking for supported models"); | |
94 | ||
90ab5ee9 | 95 | static bool ignore_dmi; |
e70c9d5e DT |
96 | module_param(ignore_dmi, bool, 0); |
97 | MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); | |
98 | ||
039ae585 | 99 | #if IS_ENABLED(CONFIG_I8K) |
7613663c | 100 | static bool restricted = true; |
1da177e4 | 101 | module_param(restricted, bool, 0); |
7613663c | 102 | MODULE_PARM_DESC(restricted, "Restrict fan control and serial number to CAP_SYS_ADMIN (default: 1)"); |
1da177e4 | 103 | |
90ab5ee9 | 104 | static bool power_status; |
1da177e4 | 105 | module_param(power_status, bool, 0600); |
7613663c | 106 | MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k (default: 0)"); |
039ae585 | 107 | #endif |
1da177e4 | 108 | |
8f21d8e9 | 109 | static uint fan_mult; |
7f69fb03 | 110 | module_param(fan_mult, uint, 0); |
8f21d8e9 | 111 | MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with (default: autodetect)"); |
4ed99a27 | 112 | |
8f21d8e9 | 113 | static uint fan_max; |
7f69fb03 | 114 | module_param(fan_max, uint, 0); |
8f21d8e9 | 115 | MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed (default: autodetect)"); |
81474fc2 | 116 | |
8378b924 | 117 | struct smm_regs { |
dec63ec3 | 118 | unsigned int eax; |
12186f51 GR |
119 | unsigned int ebx __packed; |
120 | unsigned int ecx __packed; | |
121 | unsigned int edx __packed; | |
122 | unsigned int esi __packed; | |
123 | unsigned int edi __packed; | |
8378b924 | 124 | }; |
1da177e4 | 125 | |
1855256c | 126 | static inline const char *i8k_get_dmi_data(int field) |
e70c9d5e | 127 | { |
1855256c | 128 | const char *dmi_data = dmi_get_system_info(field); |
4f005551 DT |
129 | |
130 | return dmi_data && *dmi_data ? dmi_data : "?"; | |
e70c9d5e | 131 | } |
1da177e4 LT |
132 | |
133 | /* | |
134 | * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. | |
135 | */ | |
8378b924 | 136 | static int i8k_smm(struct smm_regs *regs) |
1da177e4 | 137 | { |
dec63ec3 DT |
138 | int rc; |
139 | int eax = regs->eax; | |
f36fdb9f GR |
140 | cpumask_var_t old_mask; |
141 | ||
142 | /* SMM requires CPU 0 */ | |
143 | if (!alloc_cpumask_var(&old_mask, GFP_KERNEL)) | |
144 | return -ENOMEM; | |
145 | cpumask_copy(old_mask, ¤t->cpus_allowed); | |
6d827fbc GR |
146 | rc = set_cpus_allowed_ptr(current, cpumask_of(0)); |
147 | if (rc) | |
148 | goto out; | |
f36fdb9f GR |
149 | if (smp_processor_id() != 0) { |
150 | rc = -EBUSY; | |
151 | goto out; | |
152 | } | |
dec63ec3 | 153 | |
fe04f22f | 154 | #if defined(CONFIG_X86_64) |
22d3243d | 155 | asm volatile("pushq %%rax\n\t" |
fe04f22f BS |
156 | "movl 0(%%rax),%%edx\n\t" |
157 | "pushq %%rdx\n\t" | |
158 | "movl 4(%%rax),%%ebx\n\t" | |
159 | "movl 8(%%rax),%%ecx\n\t" | |
160 | "movl 12(%%rax),%%edx\n\t" | |
161 | "movl 16(%%rax),%%esi\n\t" | |
162 | "movl 20(%%rax),%%edi\n\t" | |
163 | "popq %%rax\n\t" | |
164 | "out %%al,$0xb2\n\t" | |
165 | "out %%al,$0x84\n\t" | |
166 | "xchgq %%rax,(%%rsp)\n\t" | |
167 | "movl %%ebx,4(%%rax)\n\t" | |
168 | "movl %%ecx,8(%%rax)\n\t" | |
169 | "movl %%edx,12(%%rax)\n\t" | |
170 | "movl %%esi,16(%%rax)\n\t" | |
171 | "movl %%edi,20(%%rax)\n\t" | |
172 | "popq %%rdx\n\t" | |
173 | "movl %%edx,0(%%rax)\n\t" | |
bc1f419c LT |
174 | "pushfq\n\t" |
175 | "popq %%rax\n\t" | |
fe04f22f | 176 | "andl $1,%%eax\n" |
12186f51 | 177 | : "=a"(rc) |
fe04f22f BS |
178 | : "a"(regs) |
179 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
180 | #else | |
22d3243d | 181 | asm volatile("pushl %%eax\n\t" |
dec63ec3 DT |
182 | "movl 0(%%eax),%%edx\n\t" |
183 | "push %%edx\n\t" | |
184 | "movl 4(%%eax),%%ebx\n\t" | |
185 | "movl 8(%%eax),%%ecx\n\t" | |
186 | "movl 12(%%eax),%%edx\n\t" | |
187 | "movl 16(%%eax),%%esi\n\t" | |
188 | "movl 20(%%eax),%%edi\n\t" | |
189 | "popl %%eax\n\t" | |
190 | "out %%al,$0xb2\n\t" | |
191 | "out %%al,$0x84\n\t" | |
192 | "xchgl %%eax,(%%esp)\n\t" | |
193 | "movl %%ebx,4(%%eax)\n\t" | |
194 | "movl %%ecx,8(%%eax)\n\t" | |
195 | "movl %%edx,12(%%eax)\n\t" | |
196 | "movl %%esi,16(%%eax)\n\t" | |
197 | "movl %%edi,20(%%eax)\n\t" | |
198 | "popl %%edx\n\t" | |
199 | "movl %%edx,0(%%eax)\n\t" | |
200 | "lahf\n\t" | |
201 | "shrl $8,%%eax\n\t" | |
6b4e81db | 202 | "andl $1,%%eax\n" |
12186f51 | 203 | : "=a"(rc) |
dec63ec3 DT |
204 | : "a"(regs) |
205 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
fe04f22f | 206 | #endif |
8378b924 | 207 | if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
f36fdb9f | 208 | rc = -EINVAL; |
dec63ec3 | 209 | |
f36fdb9f GR |
210 | out: |
211 | set_cpus_allowed_ptr(current, old_mask); | |
212 | free_cpumask_var(old_mask); | |
213 | return rc; | |
1da177e4 LT |
214 | } |
215 | ||
1da177e4 LT |
216 | /* |
217 | * Read the fan status. | |
218 | */ | |
219 | static int i8k_get_fan_status(int fan) | |
220 | { | |
8378b924 | 221 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
1da177e4 | 222 | |
dec63ec3 | 223 | regs.ebx = fan & 0xff; |
8378b924 | 224 | return i8k_smm(®s) ? : regs.eax & 0xff; |
1da177e4 LT |
225 | } |
226 | ||
227 | /* | |
228 | * Read the fan speed in RPM. | |
229 | */ | |
230 | static int i8k_get_fan_speed(int fan) | |
231 | { | |
8378b924 | 232 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
1da177e4 | 233 | |
dec63ec3 | 234 | regs.ebx = fan & 0xff; |
26d09382 | 235 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; |
1da177e4 LT |
236 | } |
237 | ||
f989e554 PR |
238 | /* |
239 | * Read the fan type. | |
240 | */ | |
5ce91714 | 241 | static int _i8k_get_fan_type(int fan) |
f989e554 PR |
242 | { |
243 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN_TYPE, }; | |
244 | ||
2744d2fd PR |
245 | if (disallow_fan_type_call) |
246 | return -EINVAL; | |
247 | ||
f989e554 PR |
248 | regs.ebx = fan & 0xff; |
249 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
250 | } | |
251 | ||
5ce91714 PR |
252 | static int i8k_get_fan_type(int fan) |
253 | { | |
254 | /* I8K_SMM_GET_FAN_TYPE SMM call is expensive, so cache values */ | |
255 | static int types[2] = { INT_MIN, INT_MIN }; | |
256 | ||
257 | if (types[fan] == INT_MIN) | |
258 | types[fan] = _i8k_get_fan_type(fan); | |
259 | ||
260 | return types[fan]; | |
261 | } | |
262 | ||
8f21d8e9 PR |
263 | /* |
264 | * Read the fan nominal rpm for specific fan speed. | |
265 | */ | |
266 | static int i8k_get_fan_nominal_speed(int fan, int speed) | |
267 | { | |
268 | struct smm_regs regs = { .eax = I8K_SMM_GET_NOM_SPEED, }; | |
269 | ||
270 | regs.ebx = (fan & 0xff) | (speed << 8); | |
271 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; | |
272 | } | |
273 | ||
1da177e4 LT |
274 | /* |
275 | * Set the fan speed (off, low, high). Returns the new fan status. | |
276 | */ | |
277 | static int i8k_set_fan(int fan, int speed) | |
278 | { | |
8378b924 | 279 | struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
1da177e4 | 280 | |
81474fc2 | 281 | speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed); |
dec63ec3 | 282 | regs.ebx = (fan & 0xff) | (speed << 8); |
1da177e4 | 283 | |
8378b924 | 284 | return i8k_smm(®s) ? : i8k_get_fan_status(fan); |
1da177e4 LT |
285 | } |
286 | ||
5114b474 PR |
287 | static int i8k_get_temp_type(int sensor) |
288 | { | |
289 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP_TYPE, }; | |
290 | ||
291 | regs.ebx = sensor & 0xff; | |
292 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
293 | } | |
294 | ||
1da177e4 LT |
295 | /* |
296 | * Read the cpu temperature. | |
297 | */ | |
564132d9 | 298 | static int _i8k_get_temp(int sensor) |
1da177e4 | 299 | { |
564132d9 GR |
300 | struct smm_regs regs = { |
301 | .eax = I8K_SMM_GET_TEMP, | |
302 | .ebx = sensor & 0xff, | |
303 | }; | |
1da177e4 | 304 | |
564132d9 GR |
305 | return i8k_smm(®s) ? : regs.eax & 0xff; |
306 | } | |
8378b924 | 307 | |
564132d9 GR |
308 | static int i8k_get_temp(int sensor) |
309 | { | |
310 | int temp = _i8k_get_temp(sensor); | |
1da177e4 | 311 | |
dec63ec3 DT |
312 | /* |
313 | * Sometimes the temperature sensor returns 0x99, which is out of range. | |
564132d9 | 314 | * In this case we retry (once) before returning an error. |
dec63ec3 DT |
315 | # 1003655137 00000058 00005a4b |
316 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees | |
317 | # 1003655139 00000054 00005c52 | |
318 | */ | |
564132d9 GR |
319 | if (temp == 0x99) { |
320 | msleep(100); | |
321 | temp = _i8k_get_temp(sensor); | |
dec63ec3 | 322 | } |
564132d9 GR |
323 | /* |
324 | * Return -ENODATA for all invalid temperatures. | |
325 | * | |
326 | * Known instances are the 0x99 value as seen above as well as | |
327 | * 0xc1 (193), which may be returned when trying to read the GPU | |
328 | * temperature if the system supports a GPU and it is currently | |
329 | * turned off. | |
330 | */ | |
723493ca | 331 | if (temp > I8K_MAX_TEMP) |
83d514d7 | 332 | return -ENODATA; |
1da177e4 | 333 | |
dec63ec3 | 334 | return temp; |
1da177e4 LT |
335 | } |
336 | ||
7e0fa31d | 337 | static int i8k_get_dell_signature(int req_fn) |
1da177e4 | 338 | { |
7e0fa31d | 339 | struct smm_regs regs = { .eax = req_fn, }; |
dec63ec3 | 340 | int rc; |
1da177e4 | 341 | |
12186f51 GR |
342 | rc = i8k_smm(®s); |
343 | if (rc < 0) | |
dec63ec3 | 344 | return rc; |
1da177e4 | 345 | |
8378b924 | 346 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
1da177e4 LT |
347 | } |
348 | ||
039ae585 PR |
349 | #if IS_ENABLED(CONFIG_I8K) |
350 | ||
351 | /* | |
352 | * Read the Fn key status. | |
353 | */ | |
354 | static int i8k_get_fn_status(void) | |
355 | { | |
356 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; | |
357 | int rc; | |
358 | ||
359 | rc = i8k_smm(®s); | |
360 | if (rc < 0) | |
361 | return rc; | |
362 | ||
363 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { | |
364 | case I8K_FN_UP: | |
365 | return I8K_VOL_UP; | |
366 | case I8K_FN_DOWN: | |
367 | return I8K_VOL_DOWN; | |
368 | case I8K_FN_MUTE: | |
369 | return I8K_VOL_MUTE; | |
370 | default: | |
371 | return 0; | |
372 | } | |
373 | } | |
374 | ||
375 | /* | |
376 | * Read the power status. | |
377 | */ | |
378 | static int i8k_get_power_status(void) | |
379 | { | |
380 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; | |
381 | int rc; | |
382 | ||
383 | rc = i8k_smm(®s); | |
384 | if (rc < 0) | |
385 | return rc; | |
386 | ||
387 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; | |
388 | } | |
389 | ||
390 | /* | |
391 | * Procfs interface | |
392 | */ | |
393 | ||
d79b6f4d FW |
394 | static int |
395 | i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 396 | { |
e70c9d5e | 397 | int val = 0; |
dec63ec3 DT |
398 | int speed; |
399 | unsigned char buff[16]; | |
400 | int __user *argp = (int __user *)arg; | |
401 | ||
402 | if (!argp) | |
403 | return -EINVAL; | |
404 | ||
405 | switch (cmd) { | |
406 | case I8K_BIOS_VERSION: | |
053ea640 PR |
407 | if (!isdigit(bios_version[0]) || !isdigit(bios_version[1]) || |
408 | !isdigit(bios_version[2])) | |
409 | return -EINVAL; | |
410 | ||
e551b152 GR |
411 | val = (bios_version[0] << 16) | |
412 | (bios_version[1] << 8) | bios_version[2]; | |
dec63ec3 DT |
413 | break; |
414 | ||
415 | case I8K_MACHINE_ID: | |
7613663c PR |
416 | if (restricted && !capable(CAP_SYS_ADMIN)) |
417 | return -EPERM; | |
418 | ||
419 | memset(buff, 0, sizeof(buff)); | |
420 | strlcpy(buff, bios_machineid, sizeof(buff)); | |
dec63ec3 DT |
421 | break; |
422 | ||
423 | case I8K_FN_STATUS: | |
424 | val = i8k_get_fn_status(); | |
425 | break; | |
426 | ||
427 | case I8K_POWER_STATUS: | |
428 | val = i8k_get_power_status(); | |
429 | break; | |
430 | ||
431 | case I8K_GET_TEMP: | |
7e0fa31d | 432 | val = i8k_get_temp(0); |
dec63ec3 DT |
433 | break; |
434 | ||
435 | case I8K_GET_SPEED: | |
8378b924 | 436 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 437 | return -EFAULT; |
8378b924 | 438 | |
dec63ec3 DT |
439 | val = i8k_get_fan_speed(val); |
440 | break; | |
1da177e4 | 441 | |
dec63ec3 | 442 | case I8K_GET_FAN: |
8378b924 | 443 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 444 | return -EFAULT; |
8378b924 | 445 | |
dec63ec3 DT |
446 | val = i8k_get_fan_status(val); |
447 | break; | |
1da177e4 | 448 | |
dec63ec3 | 449 | case I8K_SET_FAN: |
8378b924 | 450 | if (restricted && !capable(CAP_SYS_ADMIN)) |
dec63ec3 | 451 | return -EPERM; |
8378b924 DT |
452 | |
453 | if (copy_from_user(&val, argp, sizeof(int))) | |
dec63ec3 | 454 | return -EFAULT; |
8378b924 DT |
455 | |
456 | if (copy_from_user(&speed, argp + 1, sizeof(int))) | |
dec63ec3 | 457 | return -EFAULT; |
8378b924 | 458 | |
dec63ec3 DT |
459 | val = i8k_set_fan(val, speed); |
460 | break; | |
1da177e4 | 461 | |
dec63ec3 DT |
462 | default: |
463 | return -EINVAL; | |
1da177e4 | 464 | } |
1da177e4 | 465 | |
8378b924 | 466 | if (val < 0) |
dec63ec3 | 467 | return val; |
1da177e4 | 468 | |
dec63ec3 DT |
469 | switch (cmd) { |
470 | case I8K_BIOS_VERSION: | |
8378b924 | 471 | if (copy_to_user(argp, &val, 4)) |
dec63ec3 | 472 | return -EFAULT; |
8378b924 | 473 | |
dec63ec3 DT |
474 | break; |
475 | case I8K_MACHINE_ID: | |
8378b924 | 476 | if (copy_to_user(argp, buff, 16)) |
dec63ec3 | 477 | return -EFAULT; |
8378b924 | 478 | |
dec63ec3 DT |
479 | break; |
480 | default: | |
8378b924 | 481 | if (copy_to_user(argp, &val, sizeof(int))) |
dec63ec3 | 482 | return -EFAULT; |
8378b924 | 483 | |
dec63ec3 | 484 | break; |
1da177e4 | 485 | } |
1da177e4 | 486 | |
dec63ec3 | 487 | return 0; |
1da177e4 LT |
488 | } |
489 | ||
d79b6f4d FW |
490 | static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
491 | { | |
492 | long ret; | |
493 | ||
613655fa | 494 | mutex_lock(&i8k_mutex); |
d79b6f4d | 495 | ret = i8k_ioctl_unlocked(fp, cmd, arg); |
613655fa | 496 | mutex_unlock(&i8k_mutex); |
d79b6f4d FW |
497 | |
498 | return ret; | |
499 | } | |
500 | ||
1da177e4 LT |
501 | /* |
502 | * Print the information for /proc/i8k. | |
503 | */ | |
352f8f8b | 504 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
1da177e4 | 505 | { |
352f8f8b | 506 | int fn_key, cpu_temp, ac_power; |
dec63ec3 DT |
507 | int left_fan, right_fan, left_speed, right_speed; |
508 | ||
96de0e25 JE |
509 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
510 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ | |
511 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ | |
512 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ | |
513 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ | |
514 | fn_key = i8k_get_fn_status(); /* 750 µs */ | |
8378b924 | 515 | if (power_status) |
96de0e25 | 516 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
8378b924 | 517 | else |
dec63ec3 | 518 | ac_power = -1; |
dec63ec3 DT |
519 | |
520 | /* | |
521 | * Info: | |
522 | * | |
523 | * 1) Format version (this will change if format changes) | |
524 | * 2) BIOS version | |
525 | * 3) BIOS machine ID | |
526 | * 4) Cpu temperature | |
527 | * 5) Left fan status | |
528 | * 6) Right fan status | |
529 | * 7) Left fan speed | |
530 | * 8) Right fan speed | |
531 | * 9) AC power | |
532 | * 10) Fn Key status | |
533 | */ | |
3a267d3b JP |
534 | seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
535 | I8K_PROC_FMT, | |
536 | bios_version, | |
7613663c | 537 | (restricted && !capable(CAP_SYS_ADMIN)) ? "-1" : bios_machineid, |
3a267d3b JP |
538 | cpu_temp, |
539 | left_fan, right_fan, left_speed, right_speed, | |
540 | ac_power, fn_key); | |
541 | ||
542 | return 0; | |
1da177e4 LT |
543 | } |
544 | ||
352f8f8b | 545 | static int i8k_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 546 | { |
352f8f8b | 547 | return single_open(file, i8k_proc_show, NULL); |
1da177e4 LT |
548 | } |
549 | ||
039ae585 PR |
550 | static const struct file_operations i8k_fops = { |
551 | .owner = THIS_MODULE, | |
552 | .open = i8k_open_fs, | |
553 | .read = seq_read, | |
554 | .llseek = seq_lseek, | |
555 | .release = single_release, | |
556 | .unlocked_ioctl = i8k_ioctl, | |
557 | }; | |
558 | ||
559 | static void __init i8k_init_procfs(void) | |
560 | { | |
561 | /* Register the proc entry */ | |
562 | proc_create("i8k", 0, NULL, &i8k_fops); | |
563 | } | |
564 | ||
565 | static void __exit i8k_exit_procfs(void) | |
566 | { | |
567 | remove_proc_entry("i8k", NULL); | |
568 | } | |
569 | ||
570 | #else | |
571 | ||
572 | static inline void __init i8k_init_procfs(void) | |
573 | { | |
574 | } | |
575 | ||
576 | static inline void __exit i8k_exit_procfs(void) | |
577 | { | |
578 | } | |
579 | ||
580 | #endif | |
949a9d70 JD |
581 | |
582 | /* | |
583 | * Hwmon interface | |
584 | */ | |
585 | ||
5114b474 PR |
586 | static ssize_t i8k_hwmon_show_temp_label(struct device *dev, |
587 | struct device_attribute *devattr, | |
588 | char *buf) | |
589 | { | |
590 | static const char * const labels[] = { | |
591 | "CPU", | |
592 | "GPU", | |
593 | "SODIMM", | |
594 | "Other", | |
595 | "Ambient", | |
596 | "Other", | |
597 | }; | |
598 | int index = to_sensor_dev_attr(devattr)->index; | |
599 | int type; | |
600 | ||
601 | type = i8k_get_temp_type(index); | |
602 | if (type < 0) | |
603 | return type; | |
604 | if (type >= ARRAY_SIZE(labels)) | |
605 | type = ARRAY_SIZE(labels) - 1; | |
606 | return sprintf(buf, "%s\n", labels[type]); | |
607 | } | |
608 | ||
949a9d70 JD |
609 | static ssize_t i8k_hwmon_show_temp(struct device *dev, |
610 | struct device_attribute *devattr, | |
611 | char *buf) | |
612 | { | |
d83c39de GR |
613 | int index = to_sensor_dev_attr(devattr)->index; |
614 | int temp; | |
949a9d70 | 615 | |
d83c39de GR |
616 | temp = i8k_get_temp(index); |
617 | if (temp < 0) | |
618 | return temp; | |
619 | return sprintf(buf, "%d\n", temp * 1000); | |
949a9d70 JD |
620 | } |
621 | ||
f989e554 PR |
622 | static ssize_t i8k_hwmon_show_fan_label(struct device *dev, |
623 | struct device_attribute *devattr, | |
624 | char *buf) | |
625 | { | |
626 | static const char * const labels[] = { | |
627 | "Processor Fan", | |
628 | "Motherboard Fan", | |
629 | "Video Fan", | |
630 | "Power Supply Fan", | |
631 | "Chipset Fan", | |
632 | "Other Fan", | |
633 | }; | |
634 | int index = to_sensor_dev_attr(devattr)->index; | |
635 | bool dock = false; | |
636 | int type; | |
637 | ||
638 | type = i8k_get_fan_type(index); | |
639 | if (type < 0) | |
640 | return type; | |
641 | ||
642 | if (type & 0x10) { | |
643 | dock = true; | |
644 | type &= 0x0F; | |
645 | } | |
646 | ||
647 | if (type >= ARRAY_SIZE(labels)) | |
648 | type = (ARRAY_SIZE(labels) - 1); | |
649 | ||
650 | return sprintf(buf, "%s%s\n", (dock ? "Docking " : ""), labels[type]); | |
651 | } | |
652 | ||
949a9d70 JD |
653 | static ssize_t i8k_hwmon_show_fan(struct device *dev, |
654 | struct device_attribute *devattr, | |
655 | char *buf) | |
656 | { | |
657 | int index = to_sensor_dev_attr(devattr)->index; | |
658 | int fan_speed; | |
659 | ||
660 | fan_speed = i8k_get_fan_speed(index); | |
661 | if (fan_speed < 0) | |
662 | return fan_speed; | |
663 | return sprintf(buf, "%d\n", fan_speed); | |
664 | } | |
665 | ||
e7f5f275 GR |
666 | static ssize_t i8k_hwmon_show_pwm(struct device *dev, |
667 | struct device_attribute *devattr, | |
668 | char *buf) | |
669 | { | |
670 | int index = to_sensor_dev_attr(devattr)->index; | |
671 | int status; | |
672 | ||
673 | status = i8k_get_fan_status(index); | |
674 | if (status < 0) | |
675 | return -EIO; | |
81474fc2 | 676 | return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255)); |
e7f5f275 GR |
677 | } |
678 | ||
679 | static ssize_t i8k_hwmon_set_pwm(struct device *dev, | |
680 | struct device_attribute *attr, | |
681 | const char *buf, size_t count) | |
682 | { | |
683 | int index = to_sensor_dev_attr(attr)->index; | |
684 | unsigned long val; | |
685 | int err; | |
686 | ||
687 | err = kstrtoul(buf, 10, &val); | |
688 | if (err) | |
689 | return err; | |
81474fc2 | 690 | val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max); |
e7f5f275 GR |
691 | |
692 | mutex_lock(&i8k_mutex); | |
693 | err = i8k_set_fan(index, val); | |
694 | mutex_unlock(&i8k_mutex); | |
695 | ||
696 | return err < 0 ? -EIO : count; | |
697 | } | |
698 | ||
d83c39de | 699 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0); |
5114b474 PR |
700 | static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
701 | 0); | |
d83c39de | 702 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1); |
5114b474 PR |
703 | static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
704 | 1); | |
d83c39de | 705 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2); |
5114b474 PR |
706 | static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
707 | 2); | |
d83c39de | 708 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 3); |
5114b474 PR |
709 | static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
710 | 3); | |
f989e554 PR |
711 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, 0); |
712 | static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL, | |
713 | 0); | |
e7f5f275 | 714 | static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
f989e554 | 715 | i8k_hwmon_set_pwm, 0); |
949a9d70 | 716 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
f989e554 PR |
717 | 1); |
718 | static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL, | |
719 | 1); | |
e7f5f275 | 720 | static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
f989e554 | 721 | i8k_hwmon_set_pwm, 1); |
82ba1d3f GR |
722 | |
723 | static struct attribute *i8k_attrs[] = { | |
d83c39de | 724 | &sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */ |
5114b474 PR |
725 | &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */ |
726 | &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */ | |
727 | &sensor_dev_attr_temp2_label.dev_attr.attr, /* 3 */ | |
728 | &sensor_dev_attr_temp3_input.dev_attr.attr, /* 4 */ | |
729 | &sensor_dev_attr_temp3_label.dev_attr.attr, /* 5 */ | |
730 | &sensor_dev_attr_temp4_input.dev_attr.attr, /* 6 */ | |
731 | &sensor_dev_attr_temp4_label.dev_attr.attr, /* 7 */ | |
732 | &sensor_dev_attr_fan1_input.dev_attr.attr, /* 8 */ | |
f989e554 PR |
733 | &sensor_dev_attr_fan1_label.dev_attr.attr, /* 9 */ |
734 | &sensor_dev_attr_pwm1.dev_attr.attr, /* 10 */ | |
735 | &sensor_dev_attr_fan2_input.dev_attr.attr, /* 11 */ | |
736 | &sensor_dev_attr_fan2_label.dev_attr.attr, /* 12 */ | |
737 | &sensor_dev_attr_pwm2.dev_attr.attr, /* 13 */ | |
82ba1d3f GR |
738 | NULL |
739 | }; | |
949a9d70 | 740 | |
82ba1d3f GR |
741 | static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, |
742 | int index) | |
949a9d70 | 743 | { |
2744d2fd PR |
744 | if (disallow_fan_type_call && |
745 | (index == 9 || index == 12)) | |
746 | return 0; | |
5114b474 PR |
747 | if (index >= 0 && index <= 1 && |
748 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1)) | |
82ba1d3f | 749 | return 0; |
5114b474 PR |
750 | if (index >= 2 && index <= 3 && |
751 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2)) | |
d83c39de | 752 | return 0; |
5114b474 PR |
753 | if (index >= 4 && index <= 5 && |
754 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3)) | |
d83c39de | 755 | return 0; |
5114b474 PR |
756 | if (index >= 6 && index <= 7 && |
757 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4)) | |
d83c39de | 758 | return 0; |
f989e554 | 759 | if (index >= 8 && index <= 10 && |
82ba1d3f GR |
760 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1)) |
761 | return 0; | |
f989e554 | 762 | if (index >= 11 && index <= 13 && |
82ba1d3f GR |
763 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) |
764 | return 0; | |
765 | ||
766 | return attr->mode; | |
949a9d70 JD |
767 | } |
768 | ||
82ba1d3f GR |
769 | static const struct attribute_group i8k_group = { |
770 | .attrs = i8k_attrs, | |
771 | .is_visible = i8k_is_visible, | |
772 | }; | |
773 | __ATTRIBUTE_GROUPS(i8k); | |
774 | ||
949a9d70 JD |
775 | static int __init i8k_init_hwmon(void) |
776 | { | |
777 | int err; | |
778 | ||
82ba1d3f | 779 | i8k_hwmon_flags = 0; |
949a9d70 | 780 | |
672af223 PR |
781 | /* CPU temperature attributes, if temperature type is OK */ |
782 | err = i8k_get_temp_type(0); | |
783 | if (err >= 0) | |
82ba1d3f | 784 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1; |
d83c39de | 785 | /* check for additional temperature sensors */ |
672af223 PR |
786 | err = i8k_get_temp_type(1); |
787 | if (err >= 0) | |
d83c39de | 788 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2; |
672af223 PR |
789 | err = i8k_get_temp_type(2); |
790 | if (err >= 0) | |
d83c39de | 791 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3; |
672af223 PR |
792 | err = i8k_get_temp_type(3); |
793 | if (err >= 0) | |
d83c39de | 794 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4; |
949a9d70 | 795 | |
5ce91714 PR |
796 | /* First fan attributes, if fan status or type is OK */ |
797 | err = i8k_get_fan_status(0); | |
798 | if (err < 0) | |
799 | err = i8k_get_fan_type(0); | |
82ba1d3f GR |
800 | if (err >= 0) |
801 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1; | |
949a9d70 | 802 | |
5ce91714 PR |
803 | /* Second fan attributes, if fan status or type is OK */ |
804 | err = i8k_get_fan_status(1); | |
805 | if (err < 0) | |
806 | err = i8k_get_fan_type(1); | |
82ba1d3f GR |
807 | if (err >= 0) |
808 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2; | |
949a9d70 | 809 | |
9026cae1 | 810 | i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "dell_smm", |
039ae585 | 811 | NULL, i8k_groups); |
82ba1d3f GR |
812 | if (IS_ERR(i8k_hwmon_dev)) { |
813 | err = PTR_ERR(i8k_hwmon_dev); | |
814 | i8k_hwmon_dev = NULL; | |
815 | pr_err("hwmon registration failed (%d)\n", err); | |
816 | return err; | |
817 | } | |
949a9d70 | 818 | return 0; |
949a9d70 JD |
819 | } |
820 | ||
81474fc2 | 821 | struct i8k_config_data { |
7f69fb03 PR |
822 | uint fan_mult; |
823 | uint fan_max; | |
81474fc2 GR |
824 | }; |
825 | ||
826 | enum i8k_configs { | |
7b883446 GR |
827 | DELL_LATITUDE_D520, |
828 | DELL_PRECISION_490, | |
81474fc2 | 829 | DELL_STUDIO, |
34ae40f6 | 830 | DELL_XPS, |
81474fc2 GR |
831 | }; |
832 | ||
833 | static const struct i8k_config_data i8k_config_data[] = { | |
7b883446 GR |
834 | [DELL_LATITUDE_D520] = { |
835 | .fan_mult = 1, | |
836 | .fan_max = I8K_FAN_TURBO, | |
837 | }, | |
838 | [DELL_PRECISION_490] = { | |
839 | .fan_mult = 1, | |
840 | .fan_max = I8K_FAN_TURBO, | |
841 | }, | |
81474fc2 GR |
842 | [DELL_STUDIO] = { |
843 | .fan_mult = 1, | |
844 | .fan_max = I8K_FAN_HIGH, | |
845 | }, | |
34ae40f6 | 846 | [DELL_XPS] = { |
81474fc2 GR |
847 | .fan_mult = 1, |
848 | .fan_max = I8K_FAN_HIGH, | |
849 | }, | |
850 | }; | |
851 | ||
12186f51 | 852 | static struct dmi_system_id i8k_dmi_table[] __initdata = { |
e70c9d5e DT |
853 | { |
854 | .ident = "Dell Inspiron", | |
855 | .matches = { | |
856 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
857 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
858 | }, | |
859 | }, | |
860 | { | |
861 | .ident = "Dell Latitude", | |
862 | .matches = { | |
863 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
864 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
865 | }, | |
866 | }, | |
7e0fa31d DT |
867 | { |
868 | .ident = "Dell Inspiron 2", | |
869 | .matches = { | |
870 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
871 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
872 | }, | |
873 | }, | |
7b883446 GR |
874 | { |
875 | .ident = "Dell Latitude D520", | |
876 | .matches = { | |
877 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
878 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"), | |
879 | }, | |
880 | .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520], | |
881 | }, | |
7e0fa31d DT |
882 | { |
883 | .ident = "Dell Latitude 2", | |
884 | .matches = { | |
885 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
886 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
887 | }, | |
888 | }, | |
a9000d03 NW |
889 | { /* UK Inspiron 6400 */ |
890 | .ident = "Dell Inspiron 3", | |
891 | .matches = { | |
892 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
893 | DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), | |
894 | }, | |
895 | }, | |
48103c52 FS |
896 | { |
897 | .ident = "Dell Inspiron 3", | |
898 | .matches = { | |
899 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
900 | DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), | |
901 | }, | |
902 | }, | |
7b883446 GR |
903 | { |
904 | .ident = "Dell Precision 490", | |
905 | .matches = { | |
906 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
907 | DMI_MATCH(DMI_PRODUCT_NAME, | |
908 | "Precision WorkStation 490"), | |
909 | }, | |
910 | .driver_data = (void *)&i8k_config_data[DELL_PRECISION_490], | |
911 | }, | |
7ab21a86 AS |
912 | { |
913 | .ident = "Dell Precision", | |
914 | .matches = { | |
915 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
916 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), | |
917 | }, | |
918 | }, | |
bef2a508 FH |
919 | { |
920 | .ident = "Dell Vostro", | |
921 | .matches = { | |
922 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
923 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), | |
924 | }, | |
925 | }, | |
9aa5b018 AC |
926 | { |
927 | .ident = "Dell XPS421", | |
928 | .matches = { | |
929 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
930 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), | |
931 | }, | |
932 | }, | |
ff457bde GR |
933 | { |
934 | .ident = "Dell Studio", | |
935 | .matches = { | |
936 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
937 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), | |
938 | }, | |
81474fc2 | 939 | .driver_data = (void *)&i8k_config_data[DELL_STUDIO], |
ff457bde | 940 | }, |
34ae40f6 GR |
941 | { |
942 | .ident = "Dell XPS 13", | |
943 | .matches = { | |
944 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
945 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS13"), | |
946 | }, | |
947 | .driver_data = (void *)&i8k_config_data[DELL_XPS], | |
948 | }, | |
919a0304 GR |
949 | { |
950 | .ident = "Dell XPS M140", | |
951 | .matches = { | |
952 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
953 | DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), | |
954 | }, | |
34ae40f6 | 955 | .driver_data = (void *)&i8k_config_data[DELL_XPS], |
919a0304 | 956 | }, |
12186f51 | 957 | { } |
e70c9d5e | 958 | }; |
1da177e4 | 959 | |
148b1fda PR |
960 | MODULE_DEVICE_TABLE(dmi, i8k_dmi_table); |
961 | ||
2744d2fd PR |
962 | /* |
963 | * On some machines once I8K_SMM_GET_FAN_TYPE is issued then CPU fan speed | |
964 | * randomly going up and down due to bug in Dell SMM or BIOS. Here is blacklist | |
965 | * of affected Dell machines for which we disallow I8K_SMM_GET_FAN_TYPE call. | |
966 | * See bug: https://bugzilla.kernel.org/show_bug.cgi?id=100121 | |
967 | */ | |
968 | static struct dmi_system_id i8k_blacklist_fan_type_dmi_table[] __initdata = { | |
6220f4eb | 969 | { |
6220f4eb TL |
970 | .ident = "Dell Studio XPS 8000", |
971 | .matches = { | |
972 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
973 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Studio XPS 8000"), | |
974 | }, | |
975 | }, | |
a4b45b25 | 976 | { |
a4b45b25 PR |
977 | .ident = "Dell Studio XPS 8100", |
978 | .matches = { | |
979 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
980 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Studio XPS 8100"), | |
981 | }, | |
982 | }, | |
2744d2fd PR |
983 | { |
984 | .ident = "Dell Inspiron 580", | |
985 | .matches = { | |
986 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
987 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Inspiron 580 "), | |
988 | }, | |
989 | }, | |
a4b45b25 PR |
990 | { } |
991 | }; | |
992 | ||
1da177e4 LT |
993 | /* |
994 | * Probe for the presence of a supported laptop. | |
995 | */ | |
996 | static int __init i8k_probe(void) | |
997 | { | |
26d09382 | 998 | const struct dmi_system_id *id; |
8f21d8e9 | 999 | int fan, ret; |
dec63ec3 | 1000 | |
1da177e4 | 1001 | /* |
dec63ec3 | 1002 | * Get DMI information |
1da177e4 | 1003 | */ |
2744d2fd | 1004 | if (!dmi_check_system(i8k_dmi_table)) { |
e70c9d5e DT |
1005 | if (!ignore_dmi && !force) |
1006 | return -ENODEV; | |
1007 | ||
60e71aaf GR |
1008 | pr_info("not running on a supported Dell system.\n"); |
1009 | pr_info("vendor=%s, model=%s, version=%s\n", | |
e70c9d5e DT |
1010 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
1011 | i8k_get_dmi_data(DMI_PRODUCT_NAME), | |
1012 | i8k_get_dmi_data(DMI_BIOS_VERSION)); | |
1da177e4 | 1013 | } |
dec63ec3 | 1014 | |
2744d2fd PR |
1015 | if (dmi_check_system(i8k_blacklist_fan_type_dmi_table)) |
1016 | disallow_fan_type_call = true; | |
1017 | ||
12186f51 GR |
1018 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), |
1019 | sizeof(bios_version)); | |
7613663c PR |
1020 | strlcpy(bios_machineid, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
1021 | sizeof(bios_machineid)); | |
e70c9d5e | 1022 | |
1da177e4 | 1023 | /* |
dec63ec3 | 1024 | * Get SMM Dell signature |
1da177e4 | 1025 | */ |
7e0fa31d DT |
1026 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
1027 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { | |
60e71aaf | 1028 | pr_err("unable to get SMM Dell signature\n"); |
e70c9d5e DT |
1029 | if (!force) |
1030 | return -ENODEV; | |
1da177e4 | 1031 | } |
1da177e4 | 1032 | |
8f21d8e9 PR |
1033 | /* |
1034 | * Set fan multiplier and maximal fan speed from dmi config | |
1035 | * Values specified in module parameters override values from dmi | |
1036 | */ | |
26d09382 | 1037 | id = dmi_first_match(i8k_dmi_table); |
81474fc2 GR |
1038 | if (id && id->driver_data) { |
1039 | const struct i8k_config_data *conf = id->driver_data; | |
8f21d8e9 PR |
1040 | if (!fan_mult && conf->fan_mult) |
1041 | fan_mult = conf->fan_mult; | |
1042 | if (!fan_max && conf->fan_max) | |
1043 | fan_max = conf->fan_max; | |
81474fc2 | 1044 | } |
8f21d8e9 PR |
1045 | |
1046 | i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */ | |
81474fc2 | 1047 | i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max); |
26d09382 | 1048 | |
8f21d8e9 PR |
1049 | if (!fan_mult) { |
1050 | /* | |
1051 | * Autodetect fan multiplier based on nominal rpm | |
1052 | * If fan reports rpm value too high then set multiplier to 1 | |
1053 | */ | |
1054 | for (fan = 0; fan < 2; ++fan) { | |
1055 | ret = i8k_get_fan_nominal_speed(fan, i8k_fan_max); | |
1056 | if (ret < 0) | |
1057 | continue; | |
1058 | if (ret > I8K_FAN_MAX_RPM) | |
1059 | i8k_fan_mult = 1; | |
1060 | break; | |
1061 | } | |
1062 | } else { | |
1063 | /* Fan multiplier was specified in module param or in dmi */ | |
1064 | i8k_fan_mult = fan_mult; | |
1065 | } | |
1066 | ||
dec63ec3 | 1067 | return 0; |
1da177e4 LT |
1068 | } |
1069 | ||
8378b924 | 1070 | static int __init i8k_init(void) |
1da177e4 | 1071 | { |
949a9d70 | 1072 | int err; |
dec63ec3 DT |
1073 | |
1074 | /* Are we running on an supported laptop? */ | |
e70c9d5e | 1075 | if (i8k_probe()) |
dec63ec3 | 1076 | return -ENODEV; |
dec63ec3 | 1077 | |
949a9d70 JD |
1078 | err = i8k_init_hwmon(); |
1079 | if (err) | |
039ae585 | 1080 | return err; |
949a9d70 | 1081 | |
039ae585 | 1082 | i8k_init_procfs(); |
dec63ec3 | 1083 | return 0; |
1da177e4 LT |
1084 | } |
1085 | ||
8378b924 | 1086 | static void __exit i8k_exit(void) |
1da177e4 | 1087 | { |
82ba1d3f | 1088 | hwmon_device_unregister(i8k_hwmon_dev); |
039ae585 | 1089 | i8k_exit_procfs(); |
1da177e4 | 1090 | } |
1da177e4 | 1091 | |
8378b924 DT |
1092 | module_init(i8k_init); |
1093 | module_exit(i8k_exit); |