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> |
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) | |
747bc8b0 | 84 | #define I8K_HWMON_HAVE_FAN3 (1 << 6) |
1da177e4 LT |
85 | |
86 | MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); | |
a5afba16 | 87 | MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>"); |
039ae585 | 88 | MODULE_DESCRIPTION("Dell laptop SMM BIOS hwmon driver"); |
1da177e4 | 89 | MODULE_LICENSE("GPL"); |
a5afba16 | 90 | MODULE_ALIAS("i8k"); |
1da177e4 | 91 | |
90ab5ee9 | 92 | static bool force; |
1da177e4 LT |
93 | module_param(force, bool, 0); |
94 | MODULE_PARM_DESC(force, "Force loading without checking for supported models"); | |
95 | ||
90ab5ee9 | 96 | static bool ignore_dmi; |
e70c9d5e DT |
97 | module_param(ignore_dmi, bool, 0); |
98 | MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); | |
99 | ||
039ae585 | 100 | #if IS_ENABLED(CONFIG_I8K) |
7613663c | 101 | static bool restricted = true; |
1da177e4 | 102 | module_param(restricted, bool, 0); |
7613663c | 103 | MODULE_PARM_DESC(restricted, "Restrict fan control and serial number to CAP_SYS_ADMIN (default: 1)"); |
1da177e4 | 104 | |
90ab5ee9 | 105 | static bool power_status; |
1da177e4 | 106 | module_param(power_status, bool, 0600); |
7613663c | 107 | MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k (default: 0)"); |
039ae585 | 108 | #endif |
1da177e4 | 109 | |
8f21d8e9 | 110 | static uint fan_mult; |
7f69fb03 | 111 | module_param(fan_mult, uint, 0); |
8f21d8e9 | 112 | MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with (default: autodetect)"); |
4ed99a27 | 113 | |
8f21d8e9 | 114 | static uint fan_max; |
7f69fb03 | 115 | module_param(fan_max, uint, 0); |
8f21d8e9 | 116 | MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed (default: autodetect)"); |
81474fc2 | 117 | |
8378b924 | 118 | struct smm_regs { |
dec63ec3 | 119 | unsigned int eax; |
12186f51 GR |
120 | unsigned int ebx __packed; |
121 | unsigned int ecx __packed; | |
122 | unsigned int edx __packed; | |
123 | unsigned int esi __packed; | |
124 | unsigned int edi __packed; | |
8378b924 | 125 | }; |
1da177e4 | 126 | |
1855256c | 127 | static inline const char *i8k_get_dmi_data(int field) |
e70c9d5e | 128 | { |
1855256c | 129 | const char *dmi_data = dmi_get_system_info(field); |
4f005551 DT |
130 | |
131 | return dmi_data && *dmi_data ? dmi_data : "?"; | |
e70c9d5e | 132 | } |
1da177e4 LT |
133 | |
134 | /* | |
135 | * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. | |
136 | */ | |
8378b924 | 137 | static int i8k_smm(struct smm_regs *regs) |
1da177e4 | 138 | { |
dec63ec3 DT |
139 | int rc; |
140 | int eax = regs->eax; | |
f36fdb9f GR |
141 | cpumask_var_t old_mask; |
142 | ||
143 | /* SMM requires CPU 0 */ | |
144 | if (!alloc_cpumask_var(&old_mask, GFP_KERNEL)) | |
145 | return -ENOMEM; | |
146 | cpumask_copy(old_mask, ¤t->cpus_allowed); | |
6d827fbc GR |
147 | rc = set_cpus_allowed_ptr(current, cpumask_of(0)); |
148 | if (rc) | |
149 | goto out; | |
f36fdb9f GR |
150 | if (smp_processor_id() != 0) { |
151 | rc = -EBUSY; | |
152 | goto out; | |
153 | } | |
dec63ec3 | 154 | |
fe04f22f | 155 | #if defined(CONFIG_X86_64) |
22d3243d | 156 | asm volatile("pushq %%rax\n\t" |
fe04f22f BS |
157 | "movl 0(%%rax),%%edx\n\t" |
158 | "pushq %%rdx\n\t" | |
159 | "movl 4(%%rax),%%ebx\n\t" | |
160 | "movl 8(%%rax),%%ecx\n\t" | |
161 | "movl 12(%%rax),%%edx\n\t" | |
162 | "movl 16(%%rax),%%esi\n\t" | |
163 | "movl 20(%%rax),%%edi\n\t" | |
164 | "popq %%rax\n\t" | |
165 | "out %%al,$0xb2\n\t" | |
166 | "out %%al,$0x84\n\t" | |
167 | "xchgq %%rax,(%%rsp)\n\t" | |
168 | "movl %%ebx,4(%%rax)\n\t" | |
169 | "movl %%ecx,8(%%rax)\n\t" | |
170 | "movl %%edx,12(%%rax)\n\t" | |
171 | "movl %%esi,16(%%rax)\n\t" | |
172 | "movl %%edi,20(%%rax)\n\t" | |
173 | "popq %%rdx\n\t" | |
174 | "movl %%edx,0(%%rax)\n\t" | |
bc1f419c LT |
175 | "pushfq\n\t" |
176 | "popq %%rax\n\t" | |
fe04f22f | 177 | "andl $1,%%eax\n" |
12186f51 | 178 | : "=a"(rc) |
fe04f22f BS |
179 | : "a"(regs) |
180 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
181 | #else | |
22d3243d | 182 | asm volatile("pushl %%eax\n\t" |
dec63ec3 DT |
183 | "movl 0(%%eax),%%edx\n\t" |
184 | "push %%edx\n\t" | |
185 | "movl 4(%%eax),%%ebx\n\t" | |
186 | "movl 8(%%eax),%%ecx\n\t" | |
187 | "movl 12(%%eax),%%edx\n\t" | |
188 | "movl 16(%%eax),%%esi\n\t" | |
189 | "movl 20(%%eax),%%edi\n\t" | |
190 | "popl %%eax\n\t" | |
191 | "out %%al,$0xb2\n\t" | |
192 | "out %%al,$0x84\n\t" | |
193 | "xchgl %%eax,(%%esp)\n\t" | |
194 | "movl %%ebx,4(%%eax)\n\t" | |
195 | "movl %%ecx,8(%%eax)\n\t" | |
196 | "movl %%edx,12(%%eax)\n\t" | |
197 | "movl %%esi,16(%%eax)\n\t" | |
198 | "movl %%edi,20(%%eax)\n\t" | |
199 | "popl %%edx\n\t" | |
200 | "movl %%edx,0(%%eax)\n\t" | |
201 | "lahf\n\t" | |
202 | "shrl $8,%%eax\n\t" | |
6b4e81db | 203 | "andl $1,%%eax\n" |
12186f51 | 204 | : "=a"(rc) |
dec63ec3 DT |
205 | : "a"(regs) |
206 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
fe04f22f | 207 | #endif |
8378b924 | 208 | if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
f36fdb9f | 209 | rc = -EINVAL; |
dec63ec3 | 210 | |
f36fdb9f GR |
211 | out: |
212 | set_cpus_allowed_ptr(current, old_mask); | |
213 | free_cpumask_var(old_mask); | |
214 | return rc; | |
1da177e4 LT |
215 | } |
216 | ||
1da177e4 LT |
217 | /* |
218 | * Read the fan status. | |
219 | */ | |
220 | static int i8k_get_fan_status(int fan) | |
221 | { | |
8378b924 | 222 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
1da177e4 | 223 | |
dec63ec3 | 224 | regs.ebx = fan & 0xff; |
8378b924 | 225 | return i8k_smm(®s) ? : regs.eax & 0xff; |
1da177e4 LT |
226 | } |
227 | ||
228 | /* | |
229 | * Read the fan speed in RPM. | |
230 | */ | |
231 | static int i8k_get_fan_speed(int fan) | |
232 | { | |
8378b924 | 233 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
1da177e4 | 234 | |
dec63ec3 | 235 | regs.ebx = fan & 0xff; |
26d09382 | 236 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; |
1da177e4 LT |
237 | } |
238 | ||
f989e554 PR |
239 | /* |
240 | * Read the fan type. | |
241 | */ | |
5ce91714 | 242 | static int _i8k_get_fan_type(int fan) |
f989e554 PR |
243 | { |
244 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN_TYPE, }; | |
245 | ||
2744d2fd PR |
246 | if (disallow_fan_type_call) |
247 | return -EINVAL; | |
248 | ||
f989e554 PR |
249 | regs.ebx = fan & 0xff; |
250 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
251 | } | |
252 | ||
5ce91714 PR |
253 | static int i8k_get_fan_type(int fan) |
254 | { | |
255 | /* I8K_SMM_GET_FAN_TYPE SMM call is expensive, so cache values */ | |
747bc8b0 | 256 | static int types[3] = { INT_MIN, INT_MIN, INT_MIN }; |
5ce91714 PR |
257 | |
258 | if (types[fan] == INT_MIN) | |
259 | types[fan] = _i8k_get_fan_type(fan); | |
260 | ||
261 | return types[fan]; | |
262 | } | |
263 | ||
8f21d8e9 PR |
264 | /* |
265 | * Read the fan nominal rpm for specific fan speed. | |
266 | */ | |
267 | static int i8k_get_fan_nominal_speed(int fan, int speed) | |
268 | { | |
269 | struct smm_regs regs = { .eax = I8K_SMM_GET_NOM_SPEED, }; | |
270 | ||
271 | regs.ebx = (fan & 0xff) | (speed << 8); | |
272 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; | |
273 | } | |
274 | ||
1da177e4 LT |
275 | /* |
276 | * Set the fan speed (off, low, high). Returns the new fan status. | |
277 | */ | |
278 | static int i8k_set_fan(int fan, int speed) | |
279 | { | |
8378b924 | 280 | struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
1da177e4 | 281 | |
81474fc2 | 282 | speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed); |
dec63ec3 | 283 | regs.ebx = (fan & 0xff) | (speed << 8); |
1da177e4 | 284 | |
8378b924 | 285 | return i8k_smm(®s) ? : i8k_get_fan_status(fan); |
1da177e4 LT |
286 | } |
287 | ||
5114b474 PR |
288 | static int i8k_get_temp_type(int sensor) |
289 | { | |
290 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP_TYPE, }; | |
291 | ||
292 | regs.ebx = sensor & 0xff; | |
293 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
294 | } | |
295 | ||
1da177e4 LT |
296 | /* |
297 | * Read the cpu temperature. | |
298 | */ | |
564132d9 | 299 | static int _i8k_get_temp(int sensor) |
1da177e4 | 300 | { |
564132d9 GR |
301 | struct smm_regs regs = { |
302 | .eax = I8K_SMM_GET_TEMP, | |
303 | .ebx = sensor & 0xff, | |
304 | }; | |
1da177e4 | 305 | |
564132d9 GR |
306 | return i8k_smm(®s) ? : regs.eax & 0xff; |
307 | } | |
8378b924 | 308 | |
564132d9 GR |
309 | static int i8k_get_temp(int sensor) |
310 | { | |
311 | int temp = _i8k_get_temp(sensor); | |
1da177e4 | 312 | |
dec63ec3 DT |
313 | /* |
314 | * Sometimes the temperature sensor returns 0x99, which is out of range. | |
564132d9 | 315 | * In this case we retry (once) before returning an error. |
dec63ec3 DT |
316 | # 1003655137 00000058 00005a4b |
317 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees | |
318 | # 1003655139 00000054 00005c52 | |
319 | */ | |
564132d9 GR |
320 | if (temp == 0x99) { |
321 | msleep(100); | |
322 | temp = _i8k_get_temp(sensor); | |
dec63ec3 | 323 | } |
564132d9 GR |
324 | /* |
325 | * Return -ENODATA for all invalid temperatures. | |
326 | * | |
327 | * Known instances are the 0x99 value as seen above as well as | |
328 | * 0xc1 (193), which may be returned when trying to read the GPU | |
329 | * temperature if the system supports a GPU and it is currently | |
330 | * turned off. | |
331 | */ | |
723493ca | 332 | if (temp > I8K_MAX_TEMP) |
83d514d7 | 333 | return -ENODATA; |
1da177e4 | 334 | |
dec63ec3 | 335 | return temp; |
1da177e4 LT |
336 | } |
337 | ||
7e0fa31d | 338 | static int i8k_get_dell_signature(int req_fn) |
1da177e4 | 339 | { |
7e0fa31d | 340 | struct smm_regs regs = { .eax = req_fn, }; |
dec63ec3 | 341 | int rc; |
1da177e4 | 342 | |
12186f51 GR |
343 | rc = i8k_smm(®s); |
344 | if (rc < 0) | |
dec63ec3 | 345 | return rc; |
1da177e4 | 346 | |
8378b924 | 347 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
1da177e4 LT |
348 | } |
349 | ||
039ae585 PR |
350 | #if IS_ENABLED(CONFIG_I8K) |
351 | ||
352 | /* | |
353 | * Read the Fn key status. | |
354 | */ | |
355 | static int i8k_get_fn_status(void) | |
356 | { | |
357 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; | |
358 | int rc; | |
359 | ||
360 | rc = i8k_smm(®s); | |
361 | if (rc < 0) | |
362 | return rc; | |
363 | ||
364 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { | |
365 | case I8K_FN_UP: | |
366 | return I8K_VOL_UP; | |
367 | case I8K_FN_DOWN: | |
368 | return I8K_VOL_DOWN; | |
369 | case I8K_FN_MUTE: | |
370 | return I8K_VOL_MUTE; | |
371 | default: | |
372 | return 0; | |
373 | } | |
374 | } | |
375 | ||
376 | /* | |
377 | * Read the power status. | |
378 | */ | |
379 | static int i8k_get_power_status(void) | |
380 | { | |
381 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; | |
382 | int rc; | |
383 | ||
384 | rc = i8k_smm(®s); | |
385 | if (rc < 0) | |
386 | return rc; | |
387 | ||
388 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; | |
389 | } | |
390 | ||
391 | /* | |
392 | * Procfs interface | |
393 | */ | |
394 | ||
d79b6f4d FW |
395 | static int |
396 | i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 397 | { |
e70c9d5e | 398 | int val = 0; |
dec63ec3 DT |
399 | int speed; |
400 | unsigned char buff[16]; | |
401 | int __user *argp = (int __user *)arg; | |
402 | ||
403 | if (!argp) | |
404 | return -EINVAL; | |
405 | ||
406 | switch (cmd) { | |
407 | case I8K_BIOS_VERSION: | |
053ea640 PR |
408 | if (!isdigit(bios_version[0]) || !isdigit(bios_version[1]) || |
409 | !isdigit(bios_version[2])) | |
410 | return -EINVAL; | |
411 | ||
e551b152 GR |
412 | val = (bios_version[0] << 16) | |
413 | (bios_version[1] << 8) | bios_version[2]; | |
dec63ec3 DT |
414 | break; |
415 | ||
416 | case I8K_MACHINE_ID: | |
7613663c PR |
417 | if (restricted && !capable(CAP_SYS_ADMIN)) |
418 | return -EPERM; | |
419 | ||
420 | memset(buff, 0, sizeof(buff)); | |
421 | strlcpy(buff, bios_machineid, sizeof(buff)); | |
dec63ec3 DT |
422 | break; |
423 | ||
424 | case I8K_FN_STATUS: | |
425 | val = i8k_get_fn_status(); | |
426 | break; | |
427 | ||
428 | case I8K_POWER_STATUS: | |
429 | val = i8k_get_power_status(); | |
430 | break; | |
431 | ||
432 | case I8K_GET_TEMP: | |
7e0fa31d | 433 | val = i8k_get_temp(0); |
dec63ec3 DT |
434 | break; |
435 | ||
436 | case I8K_GET_SPEED: | |
8378b924 | 437 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 438 | return -EFAULT; |
8378b924 | 439 | |
dec63ec3 DT |
440 | val = i8k_get_fan_speed(val); |
441 | break; | |
1da177e4 | 442 | |
dec63ec3 | 443 | case I8K_GET_FAN: |
8378b924 | 444 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 445 | return -EFAULT; |
8378b924 | 446 | |
dec63ec3 DT |
447 | val = i8k_get_fan_status(val); |
448 | break; | |
1da177e4 | 449 | |
dec63ec3 | 450 | case I8K_SET_FAN: |
8378b924 | 451 | if (restricted && !capable(CAP_SYS_ADMIN)) |
dec63ec3 | 452 | return -EPERM; |
8378b924 DT |
453 | |
454 | if (copy_from_user(&val, argp, sizeof(int))) | |
dec63ec3 | 455 | return -EFAULT; |
8378b924 DT |
456 | |
457 | if (copy_from_user(&speed, argp + 1, sizeof(int))) | |
dec63ec3 | 458 | return -EFAULT; |
8378b924 | 459 | |
dec63ec3 DT |
460 | val = i8k_set_fan(val, speed); |
461 | break; | |
1da177e4 | 462 | |
dec63ec3 DT |
463 | default: |
464 | return -EINVAL; | |
1da177e4 | 465 | } |
1da177e4 | 466 | |
8378b924 | 467 | if (val < 0) |
dec63ec3 | 468 | return val; |
1da177e4 | 469 | |
dec63ec3 DT |
470 | switch (cmd) { |
471 | case I8K_BIOS_VERSION: | |
8378b924 | 472 | if (copy_to_user(argp, &val, 4)) |
dec63ec3 | 473 | return -EFAULT; |
8378b924 | 474 | |
dec63ec3 DT |
475 | break; |
476 | case I8K_MACHINE_ID: | |
8378b924 | 477 | if (copy_to_user(argp, buff, 16)) |
dec63ec3 | 478 | return -EFAULT; |
8378b924 | 479 | |
dec63ec3 DT |
480 | break; |
481 | default: | |
8378b924 | 482 | if (copy_to_user(argp, &val, sizeof(int))) |
dec63ec3 | 483 | return -EFAULT; |
8378b924 | 484 | |
dec63ec3 | 485 | break; |
1da177e4 | 486 | } |
1da177e4 | 487 | |
dec63ec3 | 488 | return 0; |
1da177e4 LT |
489 | } |
490 | ||
d79b6f4d FW |
491 | static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
492 | { | |
493 | long ret; | |
494 | ||
613655fa | 495 | mutex_lock(&i8k_mutex); |
d79b6f4d | 496 | ret = i8k_ioctl_unlocked(fp, cmd, arg); |
613655fa | 497 | mutex_unlock(&i8k_mutex); |
d79b6f4d FW |
498 | |
499 | return ret; | |
500 | } | |
501 | ||
1da177e4 LT |
502 | /* |
503 | * Print the information for /proc/i8k. | |
504 | */ | |
352f8f8b | 505 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
1da177e4 | 506 | { |
352f8f8b | 507 | int fn_key, cpu_temp, ac_power; |
dec63ec3 DT |
508 | int left_fan, right_fan, left_speed, right_speed; |
509 | ||
96de0e25 JE |
510 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
511 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ | |
512 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ | |
513 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ | |
514 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ | |
515 | fn_key = i8k_get_fn_status(); /* 750 µs */ | |
8378b924 | 516 | if (power_status) |
96de0e25 | 517 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
8378b924 | 518 | else |
dec63ec3 | 519 | ac_power = -1; |
dec63ec3 DT |
520 | |
521 | /* | |
522 | * Info: | |
523 | * | |
524 | * 1) Format version (this will change if format changes) | |
525 | * 2) BIOS version | |
526 | * 3) BIOS machine ID | |
527 | * 4) Cpu temperature | |
528 | * 5) Left fan status | |
529 | * 6) Right fan status | |
530 | * 7) Left fan speed | |
531 | * 8) Right fan speed | |
532 | * 9) AC power | |
533 | * 10) Fn Key status | |
534 | */ | |
3a267d3b JP |
535 | seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
536 | I8K_PROC_FMT, | |
537 | bios_version, | |
7613663c | 538 | (restricted && !capable(CAP_SYS_ADMIN)) ? "-1" : bios_machineid, |
3a267d3b JP |
539 | cpu_temp, |
540 | left_fan, right_fan, left_speed, right_speed, | |
541 | ac_power, fn_key); | |
542 | ||
543 | return 0; | |
1da177e4 LT |
544 | } |
545 | ||
352f8f8b | 546 | static int i8k_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 547 | { |
352f8f8b | 548 | return single_open(file, i8k_proc_show, NULL); |
1da177e4 LT |
549 | } |
550 | ||
039ae585 PR |
551 | static const struct file_operations i8k_fops = { |
552 | .owner = THIS_MODULE, | |
553 | .open = i8k_open_fs, | |
554 | .read = seq_read, | |
555 | .llseek = seq_lseek, | |
556 | .release = single_release, | |
557 | .unlocked_ioctl = i8k_ioctl, | |
558 | }; | |
559 | ||
560 | static void __init i8k_init_procfs(void) | |
561 | { | |
562 | /* Register the proc entry */ | |
563 | proc_create("i8k", 0, NULL, &i8k_fops); | |
564 | } | |
565 | ||
566 | static void __exit i8k_exit_procfs(void) | |
567 | { | |
568 | remove_proc_entry("i8k", NULL); | |
569 | } | |
570 | ||
571 | #else | |
572 | ||
573 | static inline void __init i8k_init_procfs(void) | |
574 | { | |
575 | } | |
576 | ||
577 | static inline void __exit i8k_exit_procfs(void) | |
578 | { | |
579 | } | |
580 | ||
581 | #endif | |
949a9d70 JD |
582 | |
583 | /* | |
584 | * Hwmon interface | |
585 | */ | |
586 | ||
5114b474 PR |
587 | static ssize_t i8k_hwmon_show_temp_label(struct device *dev, |
588 | struct device_attribute *devattr, | |
589 | char *buf) | |
590 | { | |
591 | static const char * const labels[] = { | |
592 | "CPU", | |
593 | "GPU", | |
594 | "SODIMM", | |
595 | "Other", | |
596 | "Ambient", | |
597 | "Other", | |
598 | }; | |
599 | int index = to_sensor_dev_attr(devattr)->index; | |
600 | int type; | |
601 | ||
602 | type = i8k_get_temp_type(index); | |
603 | if (type < 0) | |
604 | return type; | |
605 | if (type >= ARRAY_SIZE(labels)) | |
606 | type = ARRAY_SIZE(labels) - 1; | |
607 | return sprintf(buf, "%s\n", labels[type]); | |
608 | } | |
609 | ||
949a9d70 JD |
610 | static ssize_t i8k_hwmon_show_temp(struct device *dev, |
611 | struct device_attribute *devattr, | |
612 | char *buf) | |
613 | { | |
d83c39de GR |
614 | int index = to_sensor_dev_attr(devattr)->index; |
615 | int temp; | |
949a9d70 | 616 | |
d83c39de GR |
617 | temp = i8k_get_temp(index); |
618 | if (temp < 0) | |
619 | return temp; | |
620 | return sprintf(buf, "%d\n", temp * 1000); | |
949a9d70 JD |
621 | } |
622 | ||
f989e554 PR |
623 | static ssize_t i8k_hwmon_show_fan_label(struct device *dev, |
624 | struct device_attribute *devattr, | |
625 | char *buf) | |
626 | { | |
627 | static const char * const labels[] = { | |
628 | "Processor Fan", | |
629 | "Motherboard Fan", | |
630 | "Video Fan", | |
631 | "Power Supply Fan", | |
632 | "Chipset Fan", | |
633 | "Other Fan", | |
634 | }; | |
635 | int index = to_sensor_dev_attr(devattr)->index; | |
636 | bool dock = false; | |
637 | int type; | |
638 | ||
639 | type = i8k_get_fan_type(index); | |
640 | if (type < 0) | |
641 | return type; | |
642 | ||
643 | if (type & 0x10) { | |
644 | dock = true; | |
645 | type &= 0x0F; | |
646 | } | |
647 | ||
648 | if (type >= ARRAY_SIZE(labels)) | |
649 | type = (ARRAY_SIZE(labels) - 1); | |
650 | ||
651 | return sprintf(buf, "%s%s\n", (dock ? "Docking " : ""), labels[type]); | |
652 | } | |
653 | ||
949a9d70 JD |
654 | static ssize_t i8k_hwmon_show_fan(struct device *dev, |
655 | struct device_attribute *devattr, | |
656 | char *buf) | |
657 | { | |
658 | int index = to_sensor_dev_attr(devattr)->index; | |
659 | int fan_speed; | |
660 | ||
661 | fan_speed = i8k_get_fan_speed(index); | |
662 | if (fan_speed < 0) | |
663 | return fan_speed; | |
664 | return sprintf(buf, "%d\n", fan_speed); | |
665 | } | |
666 | ||
e7f5f275 GR |
667 | static ssize_t i8k_hwmon_show_pwm(struct device *dev, |
668 | struct device_attribute *devattr, | |
669 | char *buf) | |
670 | { | |
671 | int index = to_sensor_dev_attr(devattr)->index; | |
672 | int status; | |
673 | ||
674 | status = i8k_get_fan_status(index); | |
675 | if (status < 0) | |
676 | return -EIO; | |
81474fc2 | 677 | return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255)); |
e7f5f275 GR |
678 | } |
679 | ||
680 | static ssize_t i8k_hwmon_set_pwm(struct device *dev, | |
681 | struct device_attribute *attr, | |
682 | const char *buf, size_t count) | |
683 | { | |
684 | int index = to_sensor_dev_attr(attr)->index; | |
685 | unsigned long val; | |
686 | int err; | |
687 | ||
688 | err = kstrtoul(buf, 10, &val); | |
689 | if (err) | |
690 | return err; | |
81474fc2 | 691 | val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max); |
e7f5f275 GR |
692 | |
693 | mutex_lock(&i8k_mutex); | |
694 | err = i8k_set_fan(index, val); | |
695 | mutex_unlock(&i8k_mutex); | |
696 | ||
697 | return err < 0 ? -EIO : count; | |
698 | } | |
699 | ||
d83c39de | 700 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0); |
5114b474 PR |
701 | static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
702 | 0); | |
d83c39de | 703 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1); |
5114b474 PR |
704 | static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
705 | 1); | |
d83c39de | 706 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2); |
5114b474 PR |
707 | static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
708 | 2); | |
d83c39de | 709 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 3); |
5114b474 PR |
710 | static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
711 | 3); | |
f989e554 PR |
712 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, 0); |
713 | static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL, | |
714 | 0); | |
e7f5f275 | 715 | static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
f989e554 | 716 | i8k_hwmon_set_pwm, 0); |
949a9d70 | 717 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
f989e554 PR |
718 | 1); |
719 | static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL, | |
720 | 1); | |
e7f5f275 | 721 | static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
f989e554 | 722 | i8k_hwmon_set_pwm, 1); |
747bc8b0 PR |
723 | static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
724 | 2); | |
725 | static SENSOR_DEVICE_ATTR(fan3_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL, | |
726 | 2); | |
727 | static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, | |
728 | i8k_hwmon_set_pwm, 2); | |
82ba1d3f GR |
729 | |
730 | static struct attribute *i8k_attrs[] = { | |
d83c39de | 731 | &sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */ |
5114b474 PR |
732 | &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */ |
733 | &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */ | |
734 | &sensor_dev_attr_temp2_label.dev_attr.attr, /* 3 */ | |
735 | &sensor_dev_attr_temp3_input.dev_attr.attr, /* 4 */ | |
736 | &sensor_dev_attr_temp3_label.dev_attr.attr, /* 5 */ | |
737 | &sensor_dev_attr_temp4_input.dev_attr.attr, /* 6 */ | |
738 | &sensor_dev_attr_temp4_label.dev_attr.attr, /* 7 */ | |
739 | &sensor_dev_attr_fan1_input.dev_attr.attr, /* 8 */ | |
f989e554 PR |
740 | &sensor_dev_attr_fan1_label.dev_attr.attr, /* 9 */ |
741 | &sensor_dev_attr_pwm1.dev_attr.attr, /* 10 */ | |
742 | &sensor_dev_attr_fan2_input.dev_attr.attr, /* 11 */ | |
743 | &sensor_dev_attr_fan2_label.dev_attr.attr, /* 12 */ | |
744 | &sensor_dev_attr_pwm2.dev_attr.attr, /* 13 */ | |
747bc8b0 PR |
745 | &sensor_dev_attr_fan3_input.dev_attr.attr, /* 14 */ |
746 | &sensor_dev_attr_fan3_label.dev_attr.attr, /* 15 */ | |
747 | &sensor_dev_attr_pwm3.dev_attr.attr, /* 16 */ | |
82ba1d3f GR |
748 | NULL |
749 | }; | |
949a9d70 | 750 | |
82ba1d3f GR |
751 | static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, |
752 | int index) | |
949a9d70 | 753 | { |
2744d2fd | 754 | if (disallow_fan_type_call && |
747bc8b0 | 755 | (index == 9 || index == 12 || index == 15)) |
2744d2fd | 756 | return 0; |
5114b474 PR |
757 | if (index >= 0 && index <= 1 && |
758 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1)) | |
82ba1d3f | 759 | return 0; |
5114b474 PR |
760 | if (index >= 2 && index <= 3 && |
761 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2)) | |
d83c39de | 762 | return 0; |
5114b474 PR |
763 | if (index >= 4 && index <= 5 && |
764 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3)) | |
d83c39de | 765 | return 0; |
5114b474 PR |
766 | if (index >= 6 && index <= 7 && |
767 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4)) | |
d83c39de | 768 | return 0; |
f989e554 | 769 | if (index >= 8 && index <= 10 && |
82ba1d3f GR |
770 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1)) |
771 | return 0; | |
f989e554 | 772 | if (index >= 11 && index <= 13 && |
82ba1d3f GR |
773 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) |
774 | return 0; | |
747bc8b0 PR |
775 | if (index >= 14 && index <= 16 && |
776 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN3)) | |
777 | return 0; | |
82ba1d3f GR |
778 | |
779 | return attr->mode; | |
949a9d70 JD |
780 | } |
781 | ||
82ba1d3f GR |
782 | static const struct attribute_group i8k_group = { |
783 | .attrs = i8k_attrs, | |
784 | .is_visible = i8k_is_visible, | |
785 | }; | |
786 | __ATTRIBUTE_GROUPS(i8k); | |
787 | ||
949a9d70 JD |
788 | static int __init i8k_init_hwmon(void) |
789 | { | |
790 | int err; | |
791 | ||
82ba1d3f | 792 | i8k_hwmon_flags = 0; |
949a9d70 | 793 | |
672af223 PR |
794 | /* CPU temperature attributes, if temperature type is OK */ |
795 | err = i8k_get_temp_type(0); | |
796 | if (err >= 0) | |
82ba1d3f | 797 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1; |
d83c39de | 798 | /* check for additional temperature sensors */ |
672af223 PR |
799 | err = i8k_get_temp_type(1); |
800 | if (err >= 0) | |
d83c39de | 801 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2; |
672af223 PR |
802 | err = i8k_get_temp_type(2); |
803 | if (err >= 0) | |
d83c39de | 804 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3; |
672af223 PR |
805 | err = i8k_get_temp_type(3); |
806 | if (err >= 0) | |
d83c39de | 807 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4; |
949a9d70 | 808 | |
5ce91714 PR |
809 | /* First fan attributes, if fan status or type is OK */ |
810 | err = i8k_get_fan_status(0); | |
811 | if (err < 0) | |
812 | err = i8k_get_fan_type(0); | |
82ba1d3f GR |
813 | if (err >= 0) |
814 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1; | |
949a9d70 | 815 | |
5ce91714 PR |
816 | /* Second fan attributes, if fan status or type is OK */ |
817 | err = i8k_get_fan_status(1); | |
818 | if (err < 0) | |
819 | err = i8k_get_fan_type(1); | |
82ba1d3f GR |
820 | if (err >= 0) |
821 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2; | |
949a9d70 | 822 | |
747bc8b0 PR |
823 | /* Third fan attributes, if fan status or type is OK */ |
824 | err = i8k_get_fan_status(2); | |
825 | if (err < 0) | |
826 | err = i8k_get_fan_type(2); | |
827 | if (err >= 0) | |
828 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN3; | |
829 | ||
9026cae1 | 830 | i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "dell_smm", |
039ae585 | 831 | NULL, i8k_groups); |
82ba1d3f GR |
832 | if (IS_ERR(i8k_hwmon_dev)) { |
833 | err = PTR_ERR(i8k_hwmon_dev); | |
834 | i8k_hwmon_dev = NULL; | |
835 | pr_err("hwmon registration failed (%d)\n", err); | |
836 | return err; | |
837 | } | |
949a9d70 | 838 | return 0; |
949a9d70 JD |
839 | } |
840 | ||
81474fc2 | 841 | struct i8k_config_data { |
7f69fb03 PR |
842 | uint fan_mult; |
843 | uint fan_max; | |
81474fc2 GR |
844 | }; |
845 | ||
846 | enum i8k_configs { | |
7b883446 GR |
847 | DELL_LATITUDE_D520, |
848 | DELL_PRECISION_490, | |
81474fc2 | 849 | DELL_STUDIO, |
34ae40f6 | 850 | DELL_XPS, |
81474fc2 GR |
851 | }; |
852 | ||
853 | static const struct i8k_config_data i8k_config_data[] = { | |
7b883446 GR |
854 | [DELL_LATITUDE_D520] = { |
855 | .fan_mult = 1, | |
856 | .fan_max = I8K_FAN_TURBO, | |
857 | }, | |
858 | [DELL_PRECISION_490] = { | |
859 | .fan_mult = 1, | |
860 | .fan_max = I8K_FAN_TURBO, | |
861 | }, | |
81474fc2 GR |
862 | [DELL_STUDIO] = { |
863 | .fan_mult = 1, | |
864 | .fan_max = I8K_FAN_HIGH, | |
865 | }, | |
34ae40f6 | 866 | [DELL_XPS] = { |
81474fc2 GR |
867 | .fan_mult = 1, |
868 | .fan_max = I8K_FAN_HIGH, | |
869 | }, | |
870 | }; | |
871 | ||
12186f51 | 872 | static struct dmi_system_id i8k_dmi_table[] __initdata = { |
e70c9d5e DT |
873 | { |
874 | .ident = "Dell Inspiron", | |
875 | .matches = { | |
876 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
877 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
878 | }, | |
879 | }, | |
880 | { | |
881 | .ident = "Dell Latitude", | |
882 | .matches = { | |
883 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
884 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
885 | }, | |
886 | }, | |
7e0fa31d DT |
887 | { |
888 | .ident = "Dell Inspiron 2", | |
889 | .matches = { | |
890 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
891 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
892 | }, | |
893 | }, | |
7b883446 GR |
894 | { |
895 | .ident = "Dell Latitude D520", | |
896 | .matches = { | |
897 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
898 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"), | |
899 | }, | |
900 | .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520], | |
901 | }, | |
7e0fa31d DT |
902 | { |
903 | .ident = "Dell Latitude 2", | |
904 | .matches = { | |
905 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
906 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
907 | }, | |
908 | }, | |
a9000d03 NW |
909 | { /* UK Inspiron 6400 */ |
910 | .ident = "Dell Inspiron 3", | |
911 | .matches = { | |
912 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
913 | DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), | |
914 | }, | |
915 | }, | |
48103c52 FS |
916 | { |
917 | .ident = "Dell Inspiron 3", | |
918 | .matches = { | |
919 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
920 | DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), | |
921 | }, | |
922 | }, | |
7b883446 GR |
923 | { |
924 | .ident = "Dell Precision 490", | |
925 | .matches = { | |
926 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
927 | DMI_MATCH(DMI_PRODUCT_NAME, | |
928 | "Precision WorkStation 490"), | |
929 | }, | |
930 | .driver_data = (void *)&i8k_config_data[DELL_PRECISION_490], | |
931 | }, | |
7ab21a86 AS |
932 | { |
933 | .ident = "Dell Precision", | |
934 | .matches = { | |
935 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
936 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), | |
937 | }, | |
938 | }, | |
bef2a508 FH |
939 | { |
940 | .ident = "Dell Vostro", | |
941 | .matches = { | |
942 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
943 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), | |
944 | }, | |
945 | }, | |
9aa5b018 AC |
946 | { |
947 | .ident = "Dell XPS421", | |
948 | .matches = { | |
949 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
950 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), | |
951 | }, | |
952 | }, | |
ff457bde GR |
953 | { |
954 | .ident = "Dell Studio", | |
955 | .matches = { | |
956 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
957 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), | |
958 | }, | |
81474fc2 | 959 | .driver_data = (void *)&i8k_config_data[DELL_STUDIO], |
ff457bde | 960 | }, |
34ae40f6 GR |
961 | { |
962 | .ident = "Dell XPS 13", | |
963 | .matches = { | |
964 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
965 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS13"), | |
966 | }, | |
967 | .driver_data = (void *)&i8k_config_data[DELL_XPS], | |
968 | }, | |
919a0304 GR |
969 | { |
970 | .ident = "Dell XPS M140", | |
971 | .matches = { | |
972 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
973 | DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), | |
974 | }, | |
34ae40f6 | 975 | .driver_data = (void *)&i8k_config_data[DELL_XPS], |
919a0304 | 976 | }, |
12186f51 | 977 | { } |
e70c9d5e | 978 | }; |
1da177e4 | 979 | |
148b1fda PR |
980 | MODULE_DEVICE_TABLE(dmi, i8k_dmi_table); |
981 | ||
2744d2fd PR |
982 | /* |
983 | * On some machines once I8K_SMM_GET_FAN_TYPE is issued then CPU fan speed | |
984 | * randomly going up and down due to bug in Dell SMM or BIOS. Here is blacklist | |
985 | * of affected Dell machines for which we disallow I8K_SMM_GET_FAN_TYPE call. | |
986 | * See bug: https://bugzilla.kernel.org/show_bug.cgi?id=100121 | |
987 | */ | |
988 | static struct dmi_system_id i8k_blacklist_fan_type_dmi_table[] __initdata = { | |
6220f4eb | 989 | { |
6220f4eb TL |
990 | .ident = "Dell Studio XPS 8000", |
991 | .matches = { | |
992 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
993 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Studio XPS 8000"), | |
994 | }, | |
995 | }, | |
a4b45b25 | 996 | { |
a4b45b25 PR |
997 | .ident = "Dell Studio XPS 8100", |
998 | .matches = { | |
999 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1000 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Studio XPS 8100"), | |
1001 | }, | |
1002 | }, | |
2744d2fd PR |
1003 | { |
1004 | .ident = "Dell Inspiron 580", | |
1005 | .matches = { | |
1006 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1007 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Inspiron 580 "), | |
1008 | }, | |
1009 | }, | |
a4b45b25 PR |
1010 | { } |
1011 | }; | |
1012 | ||
1da177e4 LT |
1013 | /* |
1014 | * Probe for the presence of a supported laptop. | |
1015 | */ | |
1016 | static int __init i8k_probe(void) | |
1017 | { | |
26d09382 | 1018 | const struct dmi_system_id *id; |
8f21d8e9 | 1019 | int fan, ret; |
dec63ec3 | 1020 | |
1da177e4 | 1021 | /* |
dec63ec3 | 1022 | * Get DMI information |
1da177e4 | 1023 | */ |
2744d2fd | 1024 | if (!dmi_check_system(i8k_dmi_table)) { |
e70c9d5e DT |
1025 | if (!ignore_dmi && !force) |
1026 | return -ENODEV; | |
1027 | ||
60e71aaf GR |
1028 | pr_info("not running on a supported Dell system.\n"); |
1029 | pr_info("vendor=%s, model=%s, version=%s\n", | |
e70c9d5e DT |
1030 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
1031 | i8k_get_dmi_data(DMI_PRODUCT_NAME), | |
1032 | i8k_get_dmi_data(DMI_BIOS_VERSION)); | |
1da177e4 | 1033 | } |
dec63ec3 | 1034 | |
2744d2fd PR |
1035 | if (dmi_check_system(i8k_blacklist_fan_type_dmi_table)) |
1036 | disallow_fan_type_call = true; | |
1037 | ||
12186f51 GR |
1038 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), |
1039 | sizeof(bios_version)); | |
7613663c PR |
1040 | strlcpy(bios_machineid, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
1041 | sizeof(bios_machineid)); | |
e70c9d5e | 1042 | |
1da177e4 | 1043 | /* |
dec63ec3 | 1044 | * Get SMM Dell signature |
1da177e4 | 1045 | */ |
7e0fa31d DT |
1046 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
1047 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { | |
60e71aaf | 1048 | pr_err("unable to get SMM Dell signature\n"); |
e70c9d5e DT |
1049 | if (!force) |
1050 | return -ENODEV; | |
1da177e4 | 1051 | } |
1da177e4 | 1052 | |
8f21d8e9 PR |
1053 | /* |
1054 | * Set fan multiplier and maximal fan speed from dmi config | |
1055 | * Values specified in module parameters override values from dmi | |
1056 | */ | |
26d09382 | 1057 | id = dmi_first_match(i8k_dmi_table); |
81474fc2 GR |
1058 | if (id && id->driver_data) { |
1059 | const struct i8k_config_data *conf = id->driver_data; | |
8f21d8e9 PR |
1060 | if (!fan_mult && conf->fan_mult) |
1061 | fan_mult = conf->fan_mult; | |
1062 | if (!fan_max && conf->fan_max) | |
1063 | fan_max = conf->fan_max; | |
81474fc2 | 1064 | } |
8f21d8e9 PR |
1065 | |
1066 | i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */ | |
81474fc2 | 1067 | i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max); |
26d09382 | 1068 | |
8f21d8e9 PR |
1069 | if (!fan_mult) { |
1070 | /* | |
1071 | * Autodetect fan multiplier based on nominal rpm | |
1072 | * If fan reports rpm value too high then set multiplier to 1 | |
1073 | */ | |
1074 | for (fan = 0; fan < 2; ++fan) { | |
1075 | ret = i8k_get_fan_nominal_speed(fan, i8k_fan_max); | |
1076 | if (ret < 0) | |
1077 | continue; | |
1078 | if (ret > I8K_FAN_MAX_RPM) | |
1079 | i8k_fan_mult = 1; | |
1080 | break; | |
1081 | } | |
1082 | } else { | |
1083 | /* Fan multiplier was specified in module param or in dmi */ | |
1084 | i8k_fan_mult = fan_mult; | |
1085 | } | |
1086 | ||
dec63ec3 | 1087 | return 0; |
1da177e4 LT |
1088 | } |
1089 | ||
8378b924 | 1090 | static int __init i8k_init(void) |
1da177e4 | 1091 | { |
949a9d70 | 1092 | int err; |
dec63ec3 DT |
1093 | |
1094 | /* Are we running on an supported laptop? */ | |
e70c9d5e | 1095 | if (i8k_probe()) |
dec63ec3 | 1096 | return -ENODEV; |
dec63ec3 | 1097 | |
949a9d70 JD |
1098 | err = i8k_init_hwmon(); |
1099 | if (err) | |
039ae585 | 1100 | return err; |
949a9d70 | 1101 | |
039ae585 | 1102 | i8k_init_procfs(); |
dec63ec3 | 1103 | return 0; |
1da177e4 LT |
1104 | } |
1105 | ||
8378b924 | 1106 | static void __exit i8k_exit(void) |
1da177e4 | 1107 | { |
82ba1d3f | 1108 | hwmon_device_unregister(i8k_hwmon_dev); |
039ae585 | 1109 | i8k_exit_procfs(); |
1da177e4 | 1110 | } |
1da177e4 | 1111 | |
8378b924 DT |
1112 | module_init(i8k_init); |
1113 | module_exit(i8k_exit); |