Commit | Line | Data |
---|---|---|
3e0a4e85 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
a5afba16 | 3 | * dell-smm-hwmon.c -- Linux driver for accessing the SMM BIOS on Dell laptops. |
1da177e4 LT |
4 | * |
5 | * Copyright (C) 2001 Massimo Dal Zotto <dz@debian.org> | |
6 | * | |
949a9d70 | 7 | * Hwmon integration: |
7c81c60f | 8 | * Copyright (C) 2011 Jean Delvare <jdelvare@suse.de> |
564132d9 | 9 | * Copyright (C) 2013, 2014 Guenter Roeck <linux@roeck-us.net> |
a5afba16 | 10 | * Copyright (C) 2014, 2015 Pali Rohár <pali.rohar@gmail.com> |
1da177e4 LT |
11 | */ |
12 | ||
60e71aaf GR |
13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
14 | ||
27046a3f | 15 | #include <linux/cpu.h> |
564132d9 | 16 | #include <linux/delay.h> |
1da177e4 LT |
17 | #include <linux/module.h> |
18 | #include <linux/types.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/proc_fs.h> | |
352f8f8b | 21 | #include <linux/seq_file.h> |
e70c9d5e | 22 | #include <linux/dmi.h> |
7e80d0d0 | 23 | #include <linux/capability.h> |
613655fa | 24 | #include <linux/mutex.h> |
949a9d70 JD |
25 | #include <linux/hwmon.h> |
26 | #include <linux/hwmon-sysfs.h> | |
12186f51 GR |
27 | #include <linux/uaccess.h> |
28 | #include <linux/io.h> | |
f36fdb9f | 29 | #include <linux/sched.h> |
053ea640 | 30 | #include <linux/ctype.h> |
27046a3f | 31 | #include <linux/smp.h> |
1da177e4 LT |
32 | |
33 | #include <linux/i8k.h> | |
34 | ||
1da177e4 LT |
35 | #define I8K_SMM_FN_STATUS 0x0025 |
36 | #define I8K_SMM_POWER_STATUS 0x0069 | |
37 | #define I8K_SMM_SET_FAN 0x01a3 | |
38 | #define I8K_SMM_GET_FAN 0x00a3 | |
39 | #define I8K_SMM_GET_SPEED 0x02a3 | |
f989e554 | 40 | #define I8K_SMM_GET_FAN_TYPE 0x03a3 |
8f21d8e9 | 41 | #define I8K_SMM_GET_NOM_SPEED 0x04a3 |
1da177e4 | 42 | #define I8K_SMM_GET_TEMP 0x10a3 |
5114b474 | 43 | #define I8K_SMM_GET_TEMP_TYPE 0x11a3 |
7e0fa31d DT |
44 | #define I8K_SMM_GET_DELL_SIG1 0xfea3 |
45 | #define I8K_SMM_GET_DELL_SIG2 0xffa3 | |
1da177e4 LT |
46 | |
47 | #define I8K_FAN_MULT 30 | |
8f21d8e9 | 48 | #define I8K_FAN_MAX_RPM 30000 |
1da177e4 LT |
49 | #define I8K_MAX_TEMP 127 |
50 | ||
51 | #define I8K_FN_NONE 0x00 | |
52 | #define I8K_FN_UP 0x01 | |
53 | #define I8K_FN_DOWN 0x02 | |
54 | #define I8K_FN_MUTE 0x04 | |
55 | #define I8K_FN_MASK 0x07 | |
56 | #define I8K_FN_SHIFT 8 | |
57 | ||
58 | #define I8K_POWER_AC 0x05 | |
59 | #define I8K_POWER_BATTERY 0x01 | |
60 | ||
613655fa | 61 | static DEFINE_MUTEX(i8k_mutex); |
e70c9d5e | 62 | static char bios_version[4]; |
7613663c | 63 | static char bios_machineid[16]; |
949a9d70 | 64 | static struct device *i8k_hwmon_dev; |
82ba1d3f | 65 | static u32 i8k_hwmon_flags; |
8f21d8e9 | 66 | static uint i8k_fan_mult = I8K_FAN_MULT; |
7f69fb03 PR |
67 | static uint i8k_pwm_mult; |
68 | static uint i8k_fan_max = I8K_FAN_HIGH; | |
2744d2fd | 69 | static bool disallow_fan_type_call; |
f480ea90 | 70 | static bool disallow_fan_support; |
82ba1d3f GR |
71 | |
72 | #define I8K_HWMON_HAVE_TEMP1 (1 << 0) | |
d83c39de GR |
73 | #define I8K_HWMON_HAVE_TEMP2 (1 << 1) |
74 | #define I8K_HWMON_HAVE_TEMP3 (1 << 2) | |
75 | #define I8K_HWMON_HAVE_TEMP4 (1 << 3) | |
1bb46a20 MS |
76 | #define I8K_HWMON_HAVE_TEMP5 (1 << 4) |
77 | #define I8K_HWMON_HAVE_TEMP6 (1 << 5) | |
78 | #define I8K_HWMON_HAVE_TEMP7 (1 << 6) | |
79 | #define I8K_HWMON_HAVE_TEMP8 (1 << 7) | |
80 | #define I8K_HWMON_HAVE_TEMP9 (1 << 8) | |
81 | #define I8K_HWMON_HAVE_TEMP10 (1 << 9) | |
82 | #define I8K_HWMON_HAVE_FAN1 (1 << 10) | |
83 | #define I8K_HWMON_HAVE_FAN2 (1 << 11) | |
84 | #define I8K_HWMON_HAVE_FAN3 (1 << 12) | |
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 | */ | |
27046a3f | 137 | static int i8k_smm_func(void *par) |
1da177e4 | 138 | { |
dec63ec3 | 139 | int rc; |
27046a3f | 140 | struct smm_regs *regs = par; |
dec63ec3 | 141 | int eax = regs->eax; |
f36fdb9f | 142 | |
9d58bec0 PR |
143 | #ifdef DEBUG |
144 | int ebx = regs->ebx; | |
145 | unsigned long duration; | |
146 | ktime_t calltime, delta, rettime; | |
147 | ||
148 | calltime = ktime_get(); | |
149 | #endif | |
150 | ||
f36fdb9f | 151 | /* SMM requires CPU 0 */ |
27046a3f JG |
152 | if (smp_processor_id() != 0) |
153 | return -EBUSY; | |
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 | |
9d58bec0 PR |
211 | #ifdef DEBUG |
212 | rettime = ktime_get(); | |
213 | delta = ktime_sub(rettime, calltime); | |
214 | duration = ktime_to_ns(delta) >> 10; | |
215 | pr_debug("smm(0x%.4x 0x%.4x) = 0x%.4x (took %7lu usecs)\n", eax, ebx, | |
216 | (rc ? 0xffff : regs->eax & 0xffff), duration); | |
217 | #endif | |
218 | ||
f36fdb9f | 219 | return rc; |
1da177e4 LT |
220 | } |
221 | ||
27046a3f JG |
222 | /* |
223 | * Call the System Management Mode BIOS. | |
224 | */ | |
225 | static int i8k_smm(struct smm_regs *regs) | |
226 | { | |
227 | int ret; | |
228 | ||
229 | get_online_cpus(); | |
230 | ret = smp_call_on_cpu(0, i8k_smm_func, regs, true); | |
231 | put_online_cpus(); | |
232 | ||
233 | return ret; | |
234 | } | |
235 | ||
1da177e4 LT |
236 | /* |
237 | * Read the fan status. | |
238 | */ | |
239 | static int i8k_get_fan_status(int fan) | |
240 | { | |
8378b924 | 241 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
1da177e4 | 242 | |
f480ea90 PR |
243 | if (disallow_fan_support) |
244 | return -EINVAL; | |
245 | ||
dec63ec3 | 246 | regs.ebx = fan & 0xff; |
8378b924 | 247 | return i8k_smm(®s) ? : regs.eax & 0xff; |
1da177e4 LT |
248 | } |
249 | ||
250 | /* | |
251 | * Read the fan speed in RPM. | |
252 | */ | |
253 | static int i8k_get_fan_speed(int fan) | |
254 | { | |
8378b924 | 255 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
1da177e4 | 256 | |
f480ea90 PR |
257 | if (disallow_fan_support) |
258 | return -EINVAL; | |
259 | ||
dec63ec3 | 260 | regs.ebx = fan & 0xff; |
26d09382 | 261 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; |
1da177e4 LT |
262 | } |
263 | ||
f989e554 PR |
264 | /* |
265 | * Read the fan type. | |
266 | */ | |
5ce91714 | 267 | static int _i8k_get_fan_type(int fan) |
f989e554 PR |
268 | { |
269 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN_TYPE, }; | |
270 | ||
f480ea90 | 271 | if (disallow_fan_support || disallow_fan_type_call) |
2744d2fd PR |
272 | return -EINVAL; |
273 | ||
f989e554 PR |
274 | regs.ebx = fan & 0xff; |
275 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
276 | } | |
277 | ||
5ce91714 PR |
278 | static int i8k_get_fan_type(int fan) |
279 | { | |
280 | /* I8K_SMM_GET_FAN_TYPE SMM call is expensive, so cache values */ | |
747bc8b0 | 281 | static int types[3] = { INT_MIN, INT_MIN, INT_MIN }; |
5ce91714 PR |
282 | |
283 | if (types[fan] == INT_MIN) | |
284 | types[fan] = _i8k_get_fan_type(fan); | |
285 | ||
286 | return types[fan]; | |
287 | } | |
288 | ||
8f21d8e9 PR |
289 | /* |
290 | * Read the fan nominal rpm for specific fan speed. | |
291 | */ | |
292 | static int i8k_get_fan_nominal_speed(int fan, int speed) | |
293 | { | |
294 | struct smm_regs regs = { .eax = I8K_SMM_GET_NOM_SPEED, }; | |
295 | ||
f480ea90 PR |
296 | if (disallow_fan_support) |
297 | return -EINVAL; | |
298 | ||
8f21d8e9 PR |
299 | regs.ebx = (fan & 0xff) | (speed << 8); |
300 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; | |
301 | } | |
302 | ||
1da177e4 LT |
303 | /* |
304 | * Set the fan speed (off, low, high). Returns the new fan status. | |
305 | */ | |
306 | static int i8k_set_fan(int fan, int speed) | |
307 | { | |
8378b924 | 308 | struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
1da177e4 | 309 | |
f480ea90 PR |
310 | if (disallow_fan_support) |
311 | return -EINVAL; | |
312 | ||
81474fc2 | 313 | speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed); |
dec63ec3 | 314 | regs.ebx = (fan & 0xff) | (speed << 8); |
1da177e4 | 315 | |
8378b924 | 316 | return i8k_smm(®s) ? : i8k_get_fan_status(fan); |
1da177e4 LT |
317 | } |
318 | ||
5114b474 PR |
319 | static int i8k_get_temp_type(int sensor) |
320 | { | |
321 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP_TYPE, }; | |
322 | ||
323 | regs.ebx = sensor & 0xff; | |
324 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
325 | } | |
326 | ||
1da177e4 LT |
327 | /* |
328 | * Read the cpu temperature. | |
329 | */ | |
564132d9 | 330 | static int _i8k_get_temp(int sensor) |
1da177e4 | 331 | { |
564132d9 GR |
332 | struct smm_regs regs = { |
333 | .eax = I8K_SMM_GET_TEMP, | |
334 | .ebx = sensor & 0xff, | |
335 | }; | |
1da177e4 | 336 | |
564132d9 GR |
337 | return i8k_smm(®s) ? : regs.eax & 0xff; |
338 | } | |
8378b924 | 339 | |
564132d9 GR |
340 | static int i8k_get_temp(int sensor) |
341 | { | |
342 | int temp = _i8k_get_temp(sensor); | |
1da177e4 | 343 | |
dec63ec3 DT |
344 | /* |
345 | * Sometimes the temperature sensor returns 0x99, which is out of range. | |
564132d9 | 346 | * In this case we retry (once) before returning an error. |
dec63ec3 DT |
347 | # 1003655137 00000058 00005a4b |
348 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees | |
349 | # 1003655139 00000054 00005c52 | |
350 | */ | |
564132d9 GR |
351 | if (temp == 0x99) { |
352 | msleep(100); | |
353 | temp = _i8k_get_temp(sensor); | |
dec63ec3 | 354 | } |
564132d9 GR |
355 | /* |
356 | * Return -ENODATA for all invalid temperatures. | |
357 | * | |
358 | * Known instances are the 0x99 value as seen above as well as | |
359 | * 0xc1 (193), which may be returned when trying to read the GPU | |
360 | * temperature if the system supports a GPU and it is currently | |
361 | * turned off. | |
362 | */ | |
723493ca | 363 | if (temp > I8K_MAX_TEMP) |
83d514d7 | 364 | return -ENODATA; |
1da177e4 | 365 | |
dec63ec3 | 366 | return temp; |
1da177e4 LT |
367 | } |
368 | ||
7e0fa31d | 369 | static int i8k_get_dell_signature(int req_fn) |
1da177e4 | 370 | { |
7e0fa31d | 371 | struct smm_regs regs = { .eax = req_fn, }; |
dec63ec3 | 372 | int rc; |
1da177e4 | 373 | |
12186f51 GR |
374 | rc = i8k_smm(®s); |
375 | if (rc < 0) | |
dec63ec3 | 376 | return rc; |
1da177e4 | 377 | |
8378b924 | 378 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
1da177e4 LT |
379 | } |
380 | ||
039ae585 PR |
381 | #if IS_ENABLED(CONFIG_I8K) |
382 | ||
383 | /* | |
384 | * Read the Fn key status. | |
385 | */ | |
386 | static int i8k_get_fn_status(void) | |
387 | { | |
388 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; | |
389 | int rc; | |
390 | ||
391 | rc = i8k_smm(®s); | |
392 | if (rc < 0) | |
393 | return rc; | |
394 | ||
395 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { | |
396 | case I8K_FN_UP: | |
397 | return I8K_VOL_UP; | |
398 | case I8K_FN_DOWN: | |
399 | return I8K_VOL_DOWN; | |
400 | case I8K_FN_MUTE: | |
401 | return I8K_VOL_MUTE; | |
402 | default: | |
403 | return 0; | |
404 | } | |
405 | } | |
406 | ||
407 | /* | |
408 | * Read the power status. | |
409 | */ | |
410 | static int i8k_get_power_status(void) | |
411 | { | |
412 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; | |
413 | int rc; | |
414 | ||
415 | rc = i8k_smm(®s); | |
416 | if (rc < 0) | |
417 | return rc; | |
418 | ||
419 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; | |
420 | } | |
421 | ||
422 | /* | |
423 | * Procfs interface | |
424 | */ | |
425 | ||
d79b6f4d FW |
426 | static int |
427 | i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 428 | { |
e70c9d5e | 429 | int val = 0; |
dec63ec3 DT |
430 | int speed; |
431 | unsigned char buff[16]; | |
432 | int __user *argp = (int __user *)arg; | |
433 | ||
434 | if (!argp) | |
435 | return -EINVAL; | |
436 | ||
437 | switch (cmd) { | |
438 | case I8K_BIOS_VERSION: | |
053ea640 PR |
439 | if (!isdigit(bios_version[0]) || !isdigit(bios_version[1]) || |
440 | !isdigit(bios_version[2])) | |
441 | return -EINVAL; | |
442 | ||
e551b152 GR |
443 | val = (bios_version[0] << 16) | |
444 | (bios_version[1] << 8) | bios_version[2]; | |
dec63ec3 DT |
445 | break; |
446 | ||
447 | case I8K_MACHINE_ID: | |
7613663c PR |
448 | if (restricted && !capable(CAP_SYS_ADMIN)) |
449 | return -EPERM; | |
450 | ||
451 | memset(buff, 0, sizeof(buff)); | |
452 | strlcpy(buff, bios_machineid, sizeof(buff)); | |
dec63ec3 DT |
453 | break; |
454 | ||
455 | case I8K_FN_STATUS: | |
456 | val = i8k_get_fn_status(); | |
457 | break; | |
458 | ||
459 | case I8K_POWER_STATUS: | |
460 | val = i8k_get_power_status(); | |
461 | break; | |
462 | ||
463 | case I8K_GET_TEMP: | |
7e0fa31d | 464 | val = i8k_get_temp(0); |
dec63ec3 DT |
465 | break; |
466 | ||
467 | case I8K_GET_SPEED: | |
8378b924 | 468 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 469 | return -EFAULT; |
8378b924 | 470 | |
dec63ec3 DT |
471 | val = i8k_get_fan_speed(val); |
472 | break; | |
1da177e4 | 473 | |
dec63ec3 | 474 | case I8K_GET_FAN: |
8378b924 | 475 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 476 | return -EFAULT; |
8378b924 | 477 | |
dec63ec3 DT |
478 | val = i8k_get_fan_status(val); |
479 | break; | |
1da177e4 | 480 | |
dec63ec3 | 481 | case I8K_SET_FAN: |
8378b924 | 482 | if (restricted && !capable(CAP_SYS_ADMIN)) |
dec63ec3 | 483 | return -EPERM; |
8378b924 DT |
484 | |
485 | if (copy_from_user(&val, argp, sizeof(int))) | |
dec63ec3 | 486 | return -EFAULT; |
8378b924 DT |
487 | |
488 | if (copy_from_user(&speed, argp + 1, sizeof(int))) | |
dec63ec3 | 489 | return -EFAULT; |
8378b924 | 490 | |
dec63ec3 DT |
491 | val = i8k_set_fan(val, speed); |
492 | break; | |
1da177e4 | 493 | |
dec63ec3 DT |
494 | default: |
495 | return -EINVAL; | |
1da177e4 | 496 | } |
1da177e4 | 497 | |
8378b924 | 498 | if (val < 0) |
dec63ec3 | 499 | return val; |
1da177e4 | 500 | |
dec63ec3 DT |
501 | switch (cmd) { |
502 | case I8K_BIOS_VERSION: | |
8378b924 | 503 | if (copy_to_user(argp, &val, 4)) |
dec63ec3 | 504 | return -EFAULT; |
8378b924 | 505 | |
dec63ec3 DT |
506 | break; |
507 | case I8K_MACHINE_ID: | |
8378b924 | 508 | if (copy_to_user(argp, buff, 16)) |
dec63ec3 | 509 | return -EFAULT; |
8378b924 | 510 | |
dec63ec3 DT |
511 | break; |
512 | default: | |
8378b924 | 513 | if (copy_to_user(argp, &val, sizeof(int))) |
dec63ec3 | 514 | return -EFAULT; |
8378b924 | 515 | |
dec63ec3 | 516 | break; |
1da177e4 | 517 | } |
1da177e4 | 518 | |
dec63ec3 | 519 | return 0; |
1da177e4 LT |
520 | } |
521 | ||
d79b6f4d FW |
522 | static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
523 | { | |
524 | long ret; | |
525 | ||
613655fa | 526 | mutex_lock(&i8k_mutex); |
d79b6f4d | 527 | ret = i8k_ioctl_unlocked(fp, cmd, arg); |
613655fa | 528 | mutex_unlock(&i8k_mutex); |
d79b6f4d FW |
529 | |
530 | return ret; | |
531 | } | |
532 | ||
1da177e4 LT |
533 | /* |
534 | * Print the information for /proc/i8k. | |
535 | */ | |
352f8f8b | 536 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
1da177e4 | 537 | { |
352f8f8b | 538 | int fn_key, cpu_temp, ac_power; |
dec63ec3 DT |
539 | int left_fan, right_fan, left_speed, right_speed; |
540 | ||
96de0e25 JE |
541 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
542 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ | |
543 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ | |
544 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ | |
545 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ | |
546 | fn_key = i8k_get_fn_status(); /* 750 µs */ | |
8378b924 | 547 | if (power_status) |
96de0e25 | 548 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
8378b924 | 549 | else |
dec63ec3 | 550 | ac_power = -1; |
dec63ec3 DT |
551 | |
552 | /* | |
553 | * Info: | |
554 | * | |
555 | * 1) Format version (this will change if format changes) | |
556 | * 2) BIOS version | |
557 | * 3) BIOS machine ID | |
558 | * 4) Cpu temperature | |
559 | * 5) Left fan status | |
560 | * 6) Right fan status | |
561 | * 7) Left fan speed | |
562 | * 8) Right fan speed | |
563 | * 9) AC power | |
564 | * 10) Fn Key status | |
565 | */ | |
3a267d3b JP |
566 | seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
567 | I8K_PROC_FMT, | |
568 | bios_version, | |
7613663c | 569 | (restricted && !capable(CAP_SYS_ADMIN)) ? "-1" : bios_machineid, |
3a267d3b JP |
570 | cpu_temp, |
571 | left_fan, right_fan, left_speed, right_speed, | |
572 | ac_power, fn_key); | |
573 | ||
574 | return 0; | |
1da177e4 LT |
575 | } |
576 | ||
352f8f8b | 577 | static int i8k_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 578 | { |
352f8f8b | 579 | return single_open(file, i8k_proc_show, NULL); |
1da177e4 LT |
580 | } |
581 | ||
039ae585 PR |
582 | static const struct file_operations i8k_fops = { |
583 | .owner = THIS_MODULE, | |
584 | .open = i8k_open_fs, | |
585 | .read = seq_read, | |
586 | .llseek = seq_lseek, | |
587 | .release = single_release, | |
588 | .unlocked_ioctl = i8k_ioctl, | |
589 | }; | |
590 | ||
591 | static void __init i8k_init_procfs(void) | |
592 | { | |
593 | /* Register the proc entry */ | |
594 | proc_create("i8k", 0, NULL, &i8k_fops); | |
595 | } | |
596 | ||
597 | static void __exit i8k_exit_procfs(void) | |
598 | { | |
599 | remove_proc_entry("i8k", NULL); | |
600 | } | |
601 | ||
602 | #else | |
603 | ||
604 | static inline void __init i8k_init_procfs(void) | |
605 | { | |
606 | } | |
607 | ||
608 | static inline void __exit i8k_exit_procfs(void) | |
609 | { | |
610 | } | |
611 | ||
612 | #endif | |
949a9d70 JD |
613 | |
614 | /* | |
615 | * Hwmon interface | |
616 | */ | |
617 | ||
ba949ed6 | 618 | static ssize_t i8k_hwmon_temp_label_show(struct device *dev, |
5114b474 PR |
619 | struct device_attribute *devattr, |
620 | char *buf) | |
621 | { | |
622 | static const char * const labels[] = { | |
623 | "CPU", | |
624 | "GPU", | |
625 | "SODIMM", | |
626 | "Other", | |
627 | "Ambient", | |
628 | "Other", | |
629 | }; | |
630 | int index = to_sensor_dev_attr(devattr)->index; | |
631 | int type; | |
632 | ||
633 | type = i8k_get_temp_type(index); | |
634 | if (type < 0) | |
635 | return type; | |
636 | if (type >= ARRAY_SIZE(labels)) | |
637 | type = ARRAY_SIZE(labels) - 1; | |
638 | return sprintf(buf, "%s\n", labels[type]); | |
639 | } | |
640 | ||
ba949ed6 | 641 | static ssize_t i8k_hwmon_temp_show(struct device *dev, |
949a9d70 JD |
642 | struct device_attribute *devattr, |
643 | char *buf) | |
644 | { | |
d83c39de GR |
645 | int index = to_sensor_dev_attr(devattr)->index; |
646 | int temp; | |
949a9d70 | 647 | |
d83c39de GR |
648 | temp = i8k_get_temp(index); |
649 | if (temp < 0) | |
650 | return temp; | |
651 | return sprintf(buf, "%d\n", temp * 1000); | |
949a9d70 JD |
652 | } |
653 | ||
ba949ed6 | 654 | static ssize_t i8k_hwmon_fan_label_show(struct device *dev, |
f989e554 PR |
655 | struct device_attribute *devattr, |
656 | char *buf) | |
657 | { | |
658 | static const char * const labels[] = { | |
659 | "Processor Fan", | |
660 | "Motherboard Fan", | |
661 | "Video Fan", | |
662 | "Power Supply Fan", | |
663 | "Chipset Fan", | |
664 | "Other Fan", | |
665 | }; | |
666 | int index = to_sensor_dev_attr(devattr)->index; | |
667 | bool dock = false; | |
668 | int type; | |
669 | ||
670 | type = i8k_get_fan_type(index); | |
671 | if (type < 0) | |
672 | return type; | |
673 | ||
674 | if (type & 0x10) { | |
675 | dock = true; | |
676 | type &= 0x0F; | |
677 | } | |
678 | ||
679 | if (type >= ARRAY_SIZE(labels)) | |
680 | type = (ARRAY_SIZE(labels) - 1); | |
681 | ||
682 | return sprintf(buf, "%s%s\n", (dock ? "Docking " : ""), labels[type]); | |
683 | } | |
684 | ||
ba949ed6 GR |
685 | static ssize_t i8k_hwmon_fan_show(struct device *dev, |
686 | struct device_attribute *devattr, char *buf) | |
949a9d70 JD |
687 | { |
688 | int index = to_sensor_dev_attr(devattr)->index; | |
689 | int fan_speed; | |
690 | ||
691 | fan_speed = i8k_get_fan_speed(index); | |
692 | if (fan_speed < 0) | |
693 | return fan_speed; | |
694 | return sprintf(buf, "%d\n", fan_speed); | |
695 | } | |
696 | ||
ba949ed6 GR |
697 | static ssize_t i8k_hwmon_pwm_show(struct device *dev, |
698 | struct device_attribute *devattr, char *buf) | |
e7f5f275 GR |
699 | { |
700 | int index = to_sensor_dev_attr(devattr)->index; | |
701 | int status; | |
702 | ||
703 | status = i8k_get_fan_status(index); | |
704 | if (status < 0) | |
705 | return -EIO; | |
81474fc2 | 706 | return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255)); |
e7f5f275 GR |
707 | } |
708 | ||
ba949ed6 GR |
709 | static ssize_t i8k_hwmon_pwm_store(struct device *dev, |
710 | struct device_attribute *attr, | |
711 | const char *buf, size_t count) | |
e7f5f275 GR |
712 | { |
713 | int index = to_sensor_dev_attr(attr)->index; | |
714 | unsigned long val; | |
715 | int err; | |
716 | ||
717 | err = kstrtoul(buf, 10, &val); | |
718 | if (err) | |
719 | return err; | |
81474fc2 | 720 | val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max); |
e7f5f275 GR |
721 | |
722 | mutex_lock(&i8k_mutex); | |
723 | err = i8k_set_fan(index, val); | |
724 | mutex_unlock(&i8k_mutex); | |
725 | ||
726 | return err < 0 ? -EIO : count; | |
727 | } | |
728 | ||
ba949ed6 GR |
729 | static SENSOR_DEVICE_ATTR_RO(temp1_input, i8k_hwmon_temp, 0); |
730 | static SENSOR_DEVICE_ATTR_RO(temp1_label, i8k_hwmon_temp_label, 0); | |
731 | static SENSOR_DEVICE_ATTR_RO(temp2_input, i8k_hwmon_temp, 1); | |
732 | static SENSOR_DEVICE_ATTR_RO(temp2_label, i8k_hwmon_temp_label, 1); | |
733 | static SENSOR_DEVICE_ATTR_RO(temp3_input, i8k_hwmon_temp, 2); | |
734 | static SENSOR_DEVICE_ATTR_RO(temp3_label, i8k_hwmon_temp_label, 2); | |
735 | static SENSOR_DEVICE_ATTR_RO(temp4_input, i8k_hwmon_temp, 3); | |
736 | static SENSOR_DEVICE_ATTR_RO(temp4_label, i8k_hwmon_temp_label, 3); | |
1bb46a20 MS |
737 | static SENSOR_DEVICE_ATTR_RO(temp5_input, i8k_hwmon_temp, 4); |
738 | static SENSOR_DEVICE_ATTR_RO(temp5_label, i8k_hwmon_temp_label, 4); | |
739 | static SENSOR_DEVICE_ATTR_RO(temp6_input, i8k_hwmon_temp, 5); | |
740 | static SENSOR_DEVICE_ATTR_RO(temp6_label, i8k_hwmon_temp_label, 5); | |
741 | static SENSOR_DEVICE_ATTR_RO(temp7_input, i8k_hwmon_temp, 6); | |
742 | static SENSOR_DEVICE_ATTR_RO(temp7_label, i8k_hwmon_temp_label, 6); | |
743 | static SENSOR_DEVICE_ATTR_RO(temp8_input, i8k_hwmon_temp, 7); | |
744 | static SENSOR_DEVICE_ATTR_RO(temp8_label, i8k_hwmon_temp_label, 7); | |
745 | static SENSOR_DEVICE_ATTR_RO(temp9_input, i8k_hwmon_temp, 8); | |
746 | static SENSOR_DEVICE_ATTR_RO(temp9_label, i8k_hwmon_temp_label, 8); | |
747 | static SENSOR_DEVICE_ATTR_RO(temp10_input, i8k_hwmon_temp, 9); | |
748 | static SENSOR_DEVICE_ATTR_RO(temp10_label, i8k_hwmon_temp_label, 9); | |
ba949ed6 GR |
749 | static SENSOR_DEVICE_ATTR_RO(fan1_input, i8k_hwmon_fan, 0); |
750 | static SENSOR_DEVICE_ATTR_RO(fan1_label, i8k_hwmon_fan_label, 0); | |
751 | static SENSOR_DEVICE_ATTR_RW(pwm1, i8k_hwmon_pwm, 0); | |
752 | static SENSOR_DEVICE_ATTR_RO(fan2_input, i8k_hwmon_fan, 1); | |
753 | static SENSOR_DEVICE_ATTR_RO(fan2_label, i8k_hwmon_fan_label, 1); | |
754 | static SENSOR_DEVICE_ATTR_RW(pwm2, i8k_hwmon_pwm, 1); | |
755 | static SENSOR_DEVICE_ATTR_RO(fan3_input, i8k_hwmon_fan, 2); | |
756 | static SENSOR_DEVICE_ATTR_RO(fan3_label, i8k_hwmon_fan_label, 2); | |
757 | static SENSOR_DEVICE_ATTR_RW(pwm3, i8k_hwmon_pwm, 2); | |
82ba1d3f GR |
758 | |
759 | static struct attribute *i8k_attrs[] = { | |
d83c39de | 760 | &sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */ |
5114b474 PR |
761 | &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */ |
762 | &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */ | |
763 | &sensor_dev_attr_temp2_label.dev_attr.attr, /* 3 */ | |
764 | &sensor_dev_attr_temp3_input.dev_attr.attr, /* 4 */ | |
765 | &sensor_dev_attr_temp3_label.dev_attr.attr, /* 5 */ | |
766 | &sensor_dev_attr_temp4_input.dev_attr.attr, /* 6 */ | |
767 | &sensor_dev_attr_temp4_label.dev_attr.attr, /* 7 */ | |
1bb46a20 MS |
768 | &sensor_dev_attr_temp5_input.dev_attr.attr, /* 8 */ |
769 | &sensor_dev_attr_temp5_label.dev_attr.attr, /* 9 */ | |
770 | &sensor_dev_attr_temp6_input.dev_attr.attr, /* 10 */ | |
771 | &sensor_dev_attr_temp6_label.dev_attr.attr, /* 11 */ | |
772 | &sensor_dev_attr_temp7_input.dev_attr.attr, /* 12 */ | |
773 | &sensor_dev_attr_temp7_label.dev_attr.attr, /* 13 */ | |
774 | &sensor_dev_attr_temp8_input.dev_attr.attr, /* 14 */ | |
775 | &sensor_dev_attr_temp8_label.dev_attr.attr, /* 15 */ | |
776 | &sensor_dev_attr_temp9_input.dev_attr.attr, /* 16 */ | |
777 | &sensor_dev_attr_temp9_label.dev_attr.attr, /* 17 */ | |
778 | &sensor_dev_attr_temp10_input.dev_attr.attr, /* 18 */ | |
779 | &sensor_dev_attr_temp10_label.dev_attr.attr, /* 19 */ | |
780 | &sensor_dev_attr_fan1_input.dev_attr.attr, /* 20 */ | |
781 | &sensor_dev_attr_fan1_label.dev_attr.attr, /* 21 */ | |
782 | &sensor_dev_attr_pwm1.dev_attr.attr, /* 22 */ | |
783 | &sensor_dev_attr_fan2_input.dev_attr.attr, /* 23 */ | |
784 | &sensor_dev_attr_fan2_label.dev_attr.attr, /* 24 */ | |
785 | &sensor_dev_attr_pwm2.dev_attr.attr, /* 25 */ | |
786 | &sensor_dev_attr_fan3_input.dev_attr.attr, /* 26 */ | |
787 | &sensor_dev_attr_fan3_label.dev_attr.attr, /* 27 */ | |
788 | &sensor_dev_attr_pwm3.dev_attr.attr, /* 28 */ | |
82ba1d3f GR |
789 | NULL |
790 | }; | |
949a9d70 | 791 | |
82ba1d3f GR |
792 | static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, |
793 | int index) | |
949a9d70 | 794 | { |
f480ea90 PR |
795 | if (disallow_fan_support && index >= 8) |
796 | return 0; | |
2744d2fd | 797 | if (disallow_fan_type_call && |
747bc8b0 | 798 | (index == 9 || index == 12 || index == 15)) |
2744d2fd | 799 | return 0; |
5114b474 PR |
800 | if (index >= 0 && index <= 1 && |
801 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1)) | |
82ba1d3f | 802 | return 0; |
5114b474 PR |
803 | if (index >= 2 && index <= 3 && |
804 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2)) | |
d83c39de | 805 | return 0; |
5114b474 PR |
806 | if (index >= 4 && index <= 5 && |
807 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3)) | |
d83c39de | 808 | return 0; |
5114b474 PR |
809 | if (index >= 6 && index <= 7 && |
810 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4)) | |
d83c39de | 811 | return 0; |
1bb46a20 MS |
812 | if (index >= 8 && index <= 9 && |
813 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP5)) | |
814 | return 0; | |
815 | if (index >= 10 && index <= 11 && | |
816 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP6)) | |
817 | return 0; | |
818 | if (index >= 12 && index <= 13 && | |
819 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP7)) | |
820 | return 0; | |
821 | if (index >= 14 && index <= 15 && | |
822 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP8)) | |
823 | return 0; | |
824 | if (index >= 16 && index <= 17 && | |
825 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP9)) | |
826 | return 0; | |
827 | if (index >= 18 && index <= 19 && | |
828 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP10)) | |
829 | return 0; | |
830 | ||
831 | if (index >= 20 && index <= 22 && | |
82ba1d3f GR |
832 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1)) |
833 | return 0; | |
1bb46a20 | 834 | if (index >= 23 && index <= 25 && |
82ba1d3f GR |
835 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) |
836 | return 0; | |
1bb46a20 | 837 | if (index >= 26 && index <= 28 && |
747bc8b0 PR |
838 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN3)) |
839 | return 0; | |
82ba1d3f GR |
840 | |
841 | return attr->mode; | |
949a9d70 JD |
842 | } |
843 | ||
82ba1d3f GR |
844 | static const struct attribute_group i8k_group = { |
845 | .attrs = i8k_attrs, | |
846 | .is_visible = i8k_is_visible, | |
847 | }; | |
848 | __ATTRIBUTE_GROUPS(i8k); | |
849 | ||
949a9d70 JD |
850 | static int __init i8k_init_hwmon(void) |
851 | { | |
852 | int err; | |
853 | ||
82ba1d3f | 854 | i8k_hwmon_flags = 0; |
949a9d70 | 855 | |
672af223 PR |
856 | /* CPU temperature attributes, if temperature type is OK */ |
857 | err = i8k_get_temp_type(0); | |
858 | if (err >= 0) | |
82ba1d3f | 859 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1; |
d83c39de | 860 | /* check for additional temperature sensors */ |
672af223 PR |
861 | err = i8k_get_temp_type(1); |
862 | if (err >= 0) | |
d83c39de | 863 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2; |
672af223 PR |
864 | err = i8k_get_temp_type(2); |
865 | if (err >= 0) | |
d83c39de | 866 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3; |
672af223 PR |
867 | err = i8k_get_temp_type(3); |
868 | if (err >= 0) | |
d83c39de | 869 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4; |
1bb46a20 MS |
870 | err = i8k_get_temp_type(4); |
871 | if (err >= 0) | |
872 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP5; | |
873 | err = i8k_get_temp_type(5); | |
874 | if (err >= 0) | |
875 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP6; | |
876 | err = i8k_get_temp_type(6); | |
877 | if (err >= 0) | |
878 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP7; | |
879 | err = i8k_get_temp_type(7); | |
880 | if (err >= 0) | |
881 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP8; | |
882 | err = i8k_get_temp_type(8); | |
883 | if (err >= 0) | |
884 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP9; | |
885 | err = i8k_get_temp_type(9); | |
886 | if (err >= 0) | |
887 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP10; | |
949a9d70 | 888 | |
5ce91714 PR |
889 | /* First fan attributes, if fan status or type is OK */ |
890 | err = i8k_get_fan_status(0); | |
891 | if (err < 0) | |
892 | err = i8k_get_fan_type(0); | |
82ba1d3f GR |
893 | if (err >= 0) |
894 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1; | |
949a9d70 | 895 | |
5ce91714 PR |
896 | /* Second fan attributes, if fan status or type is OK */ |
897 | err = i8k_get_fan_status(1); | |
898 | if (err < 0) | |
899 | err = i8k_get_fan_type(1); | |
82ba1d3f GR |
900 | if (err >= 0) |
901 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2; | |
949a9d70 | 902 | |
747bc8b0 PR |
903 | /* Third fan attributes, if fan status or type is OK */ |
904 | err = i8k_get_fan_status(2); | |
905 | if (err < 0) | |
906 | err = i8k_get_fan_type(2); | |
907 | if (err >= 0) | |
908 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN3; | |
909 | ||
9026cae1 | 910 | i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "dell_smm", |
039ae585 | 911 | NULL, i8k_groups); |
82ba1d3f GR |
912 | if (IS_ERR(i8k_hwmon_dev)) { |
913 | err = PTR_ERR(i8k_hwmon_dev); | |
914 | i8k_hwmon_dev = NULL; | |
915 | pr_err("hwmon registration failed (%d)\n", err); | |
916 | return err; | |
917 | } | |
949a9d70 | 918 | return 0; |
949a9d70 JD |
919 | } |
920 | ||
81474fc2 | 921 | struct i8k_config_data { |
7f69fb03 PR |
922 | uint fan_mult; |
923 | uint fan_max; | |
81474fc2 GR |
924 | }; |
925 | ||
926 | enum i8k_configs { | |
7b883446 GR |
927 | DELL_LATITUDE_D520, |
928 | DELL_PRECISION_490, | |
81474fc2 | 929 | DELL_STUDIO, |
34ae40f6 | 930 | DELL_XPS, |
81474fc2 GR |
931 | }; |
932 | ||
933 | static const struct i8k_config_data i8k_config_data[] = { | |
7b883446 GR |
934 | [DELL_LATITUDE_D520] = { |
935 | .fan_mult = 1, | |
936 | .fan_max = I8K_FAN_TURBO, | |
937 | }, | |
938 | [DELL_PRECISION_490] = { | |
939 | .fan_mult = 1, | |
940 | .fan_max = I8K_FAN_TURBO, | |
941 | }, | |
81474fc2 GR |
942 | [DELL_STUDIO] = { |
943 | .fan_mult = 1, | |
944 | .fan_max = I8K_FAN_HIGH, | |
945 | }, | |
34ae40f6 | 946 | [DELL_XPS] = { |
81474fc2 GR |
947 | .fan_mult = 1, |
948 | .fan_max = I8K_FAN_HIGH, | |
949 | }, | |
950 | }; | |
951 | ||
6faadbbb | 952 | static const struct dmi_system_id i8k_dmi_table[] __initconst = { |
e70c9d5e DT |
953 | { |
954 | .ident = "Dell Inspiron", | |
955 | .matches = { | |
956 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
957 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
958 | }, | |
959 | }, | |
960 | { | |
961 | .ident = "Dell Latitude", | |
962 | .matches = { | |
963 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
964 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
965 | }, | |
966 | }, | |
7e0fa31d DT |
967 | { |
968 | .ident = "Dell Inspiron 2", | |
969 | .matches = { | |
970 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
971 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
972 | }, | |
973 | }, | |
7b883446 GR |
974 | { |
975 | .ident = "Dell Latitude D520", | |
976 | .matches = { | |
977 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
978 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"), | |
979 | }, | |
980 | .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520], | |
981 | }, | |
7e0fa31d DT |
982 | { |
983 | .ident = "Dell Latitude 2", | |
984 | .matches = { | |
985 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
986 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
987 | }, | |
988 | }, | |
a9000d03 NW |
989 | { /* UK Inspiron 6400 */ |
990 | .ident = "Dell Inspiron 3", | |
991 | .matches = { | |
992 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
993 | DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), | |
994 | }, | |
995 | }, | |
48103c52 FS |
996 | { |
997 | .ident = "Dell Inspiron 3", | |
998 | .matches = { | |
999 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1000 | DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), | |
1001 | }, | |
1002 | }, | |
7b883446 GR |
1003 | { |
1004 | .ident = "Dell Precision 490", | |
1005 | .matches = { | |
1006 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1007 | DMI_MATCH(DMI_PRODUCT_NAME, | |
1008 | "Precision WorkStation 490"), | |
1009 | }, | |
1010 | .driver_data = (void *)&i8k_config_data[DELL_PRECISION_490], | |
1011 | }, | |
7ab21a86 AS |
1012 | { |
1013 | .ident = "Dell Precision", | |
1014 | .matches = { | |
1015 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1016 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), | |
1017 | }, | |
1018 | }, | |
bef2a508 FH |
1019 | { |
1020 | .ident = "Dell Vostro", | |
1021 | .matches = { | |
1022 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1023 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), | |
1024 | }, | |
1025 | }, | |
9aa5b018 AC |
1026 | { |
1027 | .ident = "Dell XPS421", | |
1028 | .matches = { | |
1029 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1030 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), | |
1031 | }, | |
1032 | }, | |
ff457bde GR |
1033 | { |
1034 | .ident = "Dell Studio", | |
1035 | .matches = { | |
1036 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1037 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), | |
1038 | }, | |
81474fc2 | 1039 | .driver_data = (void *)&i8k_config_data[DELL_STUDIO], |
ff457bde | 1040 | }, |
34ae40f6 GR |
1041 | { |
1042 | .ident = "Dell XPS 13", | |
1043 | .matches = { | |
1044 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1045 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS13"), | |
1046 | }, | |
1047 | .driver_data = (void *)&i8k_config_data[DELL_XPS], | |
1048 | }, | |
919a0304 GR |
1049 | { |
1050 | .ident = "Dell XPS M140", | |
1051 | .matches = { | |
1052 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1053 | DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), | |
1054 | }, | |
34ae40f6 | 1055 | .driver_data = (void *)&i8k_config_data[DELL_XPS], |
919a0304 | 1056 | }, |
a4811b6c PR |
1057 | { |
1058 | .ident = "Dell XPS 15 9560", | |
1059 | .matches = { | |
1060 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1061 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS 15 9560"), | |
1062 | }, | |
1063 | }, | |
162372b0 MS |
1064 | { |
1065 | .ident = "Dell XPS 15 9570", | |
1066 | .matches = { | |
1067 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1068 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS 15 9570"), | |
1069 | }, | |
1070 | }, | |
12186f51 | 1071 | { } |
e70c9d5e | 1072 | }; |
1da177e4 | 1073 | |
148b1fda PR |
1074 | MODULE_DEVICE_TABLE(dmi, i8k_dmi_table); |
1075 | ||
2744d2fd PR |
1076 | /* |
1077 | * On some machines once I8K_SMM_GET_FAN_TYPE is issued then CPU fan speed | |
1078 | * randomly going up and down due to bug in Dell SMM or BIOS. Here is blacklist | |
1079 | * of affected Dell machines for which we disallow I8K_SMM_GET_FAN_TYPE call. | |
1080 | * See bug: https://bugzilla.kernel.org/show_bug.cgi?id=100121 | |
1081 | */ | |
6faadbbb | 1082 | static const struct dmi_system_id i8k_blacklist_fan_type_dmi_table[] __initconst = { |
6220f4eb | 1083 | { |
6220f4eb TL |
1084 | .ident = "Dell Studio XPS 8000", |
1085 | .matches = { | |
1086 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1087 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Studio XPS 8000"), | |
1088 | }, | |
1089 | }, | |
a4b45b25 | 1090 | { |
a4b45b25 PR |
1091 | .ident = "Dell Studio XPS 8100", |
1092 | .matches = { | |
1093 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1094 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Studio XPS 8100"), | |
1095 | }, | |
1096 | }, | |
2744d2fd PR |
1097 | { |
1098 | .ident = "Dell Inspiron 580", | |
1099 | .matches = { | |
1100 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1101 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Inspiron 580 "), | |
1102 | }, | |
1103 | }, | |
a4b45b25 PR |
1104 | { } |
1105 | }; | |
1106 | ||
f480ea90 PR |
1107 | /* |
1108 | * On some machines all fan related SMM functions implemented by Dell BIOS | |
1109 | * firmware freeze kernel for about 500ms. Until Dell fixes these problems fan | |
1110 | * support for affected blacklisted Dell machines stay disabled. | |
1111 | * See bug: https://bugzilla.kernel.org/show_bug.cgi?id=195751 | |
1112 | */ | |
1113 | static struct dmi_system_id i8k_blacklist_fan_support_dmi_table[] __initdata = { | |
1114 | { | |
1115 | .ident = "Dell Inspiron 7720", | |
1116 | .matches = { | |
1117 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1118 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"), | |
1119 | }, | |
1120 | }, | |
6fbc4232 ON |
1121 | { |
1122 | .ident = "Dell Vostro 3360", | |
1123 | .matches = { | |
1124 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1125 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"), | |
1126 | }, | |
1127 | }, | |
536e0019 HE |
1128 | { |
1129 | .ident = "Dell XPS13 9333", | |
1130 | .matches = { | |
1131 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1132 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"), | |
1133 | }, | |
1134 | }, | |
f480ea90 PR |
1135 | { } |
1136 | }; | |
1137 | ||
1da177e4 LT |
1138 | /* |
1139 | * Probe for the presence of a supported laptop. | |
1140 | */ | |
1141 | static int __init i8k_probe(void) | |
1142 | { | |
26d09382 | 1143 | const struct dmi_system_id *id; |
8f21d8e9 | 1144 | int fan, ret; |
dec63ec3 | 1145 | |
1da177e4 | 1146 | /* |
dec63ec3 | 1147 | * Get DMI information |
1da177e4 | 1148 | */ |
2744d2fd | 1149 | if (!dmi_check_system(i8k_dmi_table)) { |
e70c9d5e DT |
1150 | if (!ignore_dmi && !force) |
1151 | return -ENODEV; | |
1152 | ||
60e71aaf GR |
1153 | pr_info("not running on a supported Dell system.\n"); |
1154 | pr_info("vendor=%s, model=%s, version=%s\n", | |
e70c9d5e DT |
1155 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
1156 | i8k_get_dmi_data(DMI_PRODUCT_NAME), | |
1157 | i8k_get_dmi_data(DMI_BIOS_VERSION)); | |
1da177e4 | 1158 | } |
dec63ec3 | 1159 | |
f480ea90 PR |
1160 | if (dmi_check_system(i8k_blacklist_fan_support_dmi_table)) { |
1161 | pr_warn("broken Dell BIOS detected, disallow fan support\n"); | |
1162 | if (!force) | |
1163 | disallow_fan_support = true; | |
1164 | } | |
1165 | ||
836ad112 PR |
1166 | if (dmi_check_system(i8k_blacklist_fan_type_dmi_table)) { |
1167 | pr_warn("broken Dell BIOS detected, disallow fan type call\n"); | |
1168 | if (!force) | |
1169 | disallow_fan_type_call = true; | |
1170 | } | |
2744d2fd | 1171 | |
12186f51 GR |
1172 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), |
1173 | sizeof(bios_version)); | |
7613663c PR |
1174 | strlcpy(bios_machineid, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
1175 | sizeof(bios_machineid)); | |
e70c9d5e | 1176 | |
1da177e4 | 1177 | /* |
dec63ec3 | 1178 | * Get SMM Dell signature |
1da177e4 | 1179 | */ |
7e0fa31d DT |
1180 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
1181 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { | |
60e71aaf | 1182 | pr_err("unable to get SMM Dell signature\n"); |
e70c9d5e DT |
1183 | if (!force) |
1184 | return -ENODEV; | |
1da177e4 | 1185 | } |
1da177e4 | 1186 | |
8f21d8e9 PR |
1187 | /* |
1188 | * Set fan multiplier and maximal fan speed from dmi config | |
1189 | * Values specified in module parameters override values from dmi | |
1190 | */ | |
26d09382 | 1191 | id = dmi_first_match(i8k_dmi_table); |
81474fc2 GR |
1192 | if (id && id->driver_data) { |
1193 | const struct i8k_config_data *conf = id->driver_data; | |
8f21d8e9 PR |
1194 | if (!fan_mult && conf->fan_mult) |
1195 | fan_mult = conf->fan_mult; | |
1196 | if (!fan_max && conf->fan_max) | |
1197 | fan_max = conf->fan_max; | |
81474fc2 | 1198 | } |
8f21d8e9 PR |
1199 | |
1200 | i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */ | |
81474fc2 | 1201 | i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max); |
26d09382 | 1202 | |
8f21d8e9 PR |
1203 | if (!fan_mult) { |
1204 | /* | |
1205 | * Autodetect fan multiplier based on nominal rpm | |
1206 | * If fan reports rpm value too high then set multiplier to 1 | |
1207 | */ | |
1208 | for (fan = 0; fan < 2; ++fan) { | |
1209 | ret = i8k_get_fan_nominal_speed(fan, i8k_fan_max); | |
1210 | if (ret < 0) | |
1211 | continue; | |
1212 | if (ret > I8K_FAN_MAX_RPM) | |
1213 | i8k_fan_mult = 1; | |
1214 | break; | |
1215 | } | |
1216 | } else { | |
1217 | /* Fan multiplier was specified in module param or in dmi */ | |
1218 | i8k_fan_mult = fan_mult; | |
1219 | } | |
1220 | ||
dec63ec3 | 1221 | return 0; |
1da177e4 LT |
1222 | } |
1223 | ||
8378b924 | 1224 | static int __init i8k_init(void) |
1da177e4 | 1225 | { |
949a9d70 | 1226 | int err; |
dec63ec3 DT |
1227 | |
1228 | /* Are we running on an supported laptop? */ | |
e70c9d5e | 1229 | if (i8k_probe()) |
dec63ec3 | 1230 | return -ENODEV; |
dec63ec3 | 1231 | |
949a9d70 JD |
1232 | err = i8k_init_hwmon(); |
1233 | if (err) | |
039ae585 | 1234 | return err; |
949a9d70 | 1235 | |
039ae585 | 1236 | i8k_init_procfs(); |
dec63ec3 | 1237 | return 0; |
1da177e4 LT |
1238 | } |
1239 | ||
8378b924 | 1240 | static void __exit i8k_exit(void) |
1da177e4 | 1241 | { |
82ba1d3f | 1242 | hwmon_device_unregister(i8k_hwmon_dev); |
039ae585 | 1243 | i8k_exit_procfs(); |
1da177e4 | 1244 | } |
1da177e4 | 1245 | |
8378b924 DT |
1246 | module_init(i8k_init); |
1247 | module_exit(i8k_exit); |