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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * i8k.c -- Linux driver for accessing the SMM BIOS on Dell laptops. | |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2001 Massimo Dal Zotto <dz@debian.org> | |
5 | * | |
949a9d70 | 6 | * Hwmon integration: |
7c81c60f | 7 | * Copyright (C) 2011 Jean Delvare <jdelvare@suse.de> |
f5a7f827 | 8 | * Copyright (C) 2013 Guenter Roeck <linux@roeck-us.net> |
949a9d70 | 9 | * |
1da177e4 LT |
10 | * This program is free software; you can redistribute it and/or modify it |
11 | * under the terms of the GNU General Public License as published by the | |
12 | * Free Software Foundation; either version 2, or (at your option) any | |
13 | * later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | */ | |
20 | ||
60e71aaf GR |
21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
22 | ||
1da177e4 LT |
23 | #include <linux/module.h> |
24 | #include <linux/types.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/proc_fs.h> | |
352f8f8b | 27 | #include <linux/seq_file.h> |
e70c9d5e | 28 | #include <linux/dmi.h> |
7e80d0d0 | 29 | #include <linux/capability.h> |
613655fa | 30 | #include <linux/mutex.h> |
949a9d70 JD |
31 | #include <linux/hwmon.h> |
32 | #include <linux/hwmon-sysfs.h> | |
12186f51 GR |
33 | #include <linux/uaccess.h> |
34 | #include <linux/io.h> | |
f36fdb9f | 35 | #include <linux/sched.h> |
1da177e4 LT |
36 | |
37 | #include <linux/i8k.h> | |
38 | ||
1da177e4 LT |
39 | #define I8K_SMM_FN_STATUS 0x0025 |
40 | #define I8K_SMM_POWER_STATUS 0x0069 | |
41 | #define I8K_SMM_SET_FAN 0x01a3 | |
42 | #define I8K_SMM_GET_FAN 0x00a3 | |
43 | #define I8K_SMM_GET_SPEED 0x02a3 | |
44 | #define I8K_SMM_GET_TEMP 0x10a3 | |
5114b474 | 45 | #define I8K_SMM_GET_TEMP_TYPE 0x11a3 |
7e0fa31d DT |
46 | #define I8K_SMM_GET_DELL_SIG1 0xfea3 |
47 | #define I8K_SMM_GET_DELL_SIG2 0xffa3 | |
1da177e4 LT |
48 | |
49 | #define I8K_FAN_MULT 30 | |
50 | #define I8K_MAX_TEMP 127 | |
51 | ||
52 | #define I8K_FN_NONE 0x00 | |
53 | #define I8K_FN_UP 0x01 | |
54 | #define I8K_FN_DOWN 0x02 | |
55 | #define I8K_FN_MUTE 0x04 | |
56 | #define I8K_FN_MASK 0x07 | |
57 | #define I8K_FN_SHIFT 8 | |
58 | ||
59 | #define I8K_POWER_AC 0x05 | |
60 | #define I8K_POWER_BATTERY 0x01 | |
61 | ||
62 | #define I8K_TEMPERATURE_BUG 1 | |
63 | ||
613655fa | 64 | static DEFINE_MUTEX(i8k_mutex); |
e70c9d5e | 65 | static char bios_version[4]; |
949a9d70 | 66 | static struct device *i8k_hwmon_dev; |
82ba1d3f | 67 | static u32 i8k_hwmon_flags; |
26d09382 | 68 | static int i8k_fan_mult; |
81474fc2 GR |
69 | static int i8k_pwm_mult; |
70 | static int i8k_fan_max = I8K_FAN_HIGH; | |
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) | |
76 | #define I8K_HWMON_HAVE_FAN1 (1 << 4) | |
77 | #define I8K_HWMON_HAVE_FAN2 (1 << 5) | |
1da177e4 LT |
78 | |
79 | MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); | |
80 | MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops"); | |
81 | MODULE_LICENSE("GPL"); | |
82 | ||
90ab5ee9 | 83 | static bool force; |
1da177e4 LT |
84 | module_param(force, bool, 0); |
85 | MODULE_PARM_DESC(force, "Force loading without checking for supported models"); | |
86 | ||
90ab5ee9 | 87 | static bool ignore_dmi; |
e70c9d5e DT |
88 | module_param(ignore_dmi, bool, 0); |
89 | MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); | |
90 | ||
90ab5ee9 | 91 | static bool restricted; |
1da177e4 LT |
92 | module_param(restricted, bool, 0); |
93 | MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set"); | |
94 | ||
90ab5ee9 | 95 | static bool power_status; |
1da177e4 LT |
96 | module_param(power_status, bool, 0600); |
97 | MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k"); | |
98 | ||
4ed99a27 JE |
99 | static int fan_mult = I8K_FAN_MULT; |
100 | module_param(fan_mult, int, 0); | |
101 | MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with"); | |
102 | ||
81474fc2 GR |
103 | static int fan_max = I8K_FAN_HIGH; |
104 | module_param(fan_max, int, 0); | |
105 | MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed"); | |
106 | ||
352f8f8b | 107 | static int i8k_open_fs(struct inode *inode, struct file *file); |
d79b6f4d | 108 | static long i8k_ioctl(struct file *, unsigned int, unsigned long); |
1da177e4 | 109 | |
62322d25 | 110 | static const struct file_operations i8k_fops = { |
1b502217 | 111 | .owner = THIS_MODULE, |
352f8f8b DT |
112 | .open = i8k_open_fs, |
113 | .read = seq_read, | |
114 | .llseek = seq_lseek, | |
115 | .release = single_release, | |
d79b6f4d | 116 | .unlocked_ioctl = i8k_ioctl, |
1da177e4 LT |
117 | }; |
118 | ||
8378b924 | 119 | struct smm_regs { |
dec63ec3 | 120 | unsigned int eax; |
12186f51 GR |
121 | unsigned int ebx __packed; |
122 | unsigned int ecx __packed; | |
123 | unsigned int edx __packed; | |
124 | unsigned int esi __packed; | |
125 | unsigned int edi __packed; | |
8378b924 | 126 | }; |
1da177e4 | 127 | |
1855256c | 128 | static inline const char *i8k_get_dmi_data(int field) |
e70c9d5e | 129 | { |
1855256c | 130 | const char *dmi_data = dmi_get_system_info(field); |
4f005551 DT |
131 | |
132 | return dmi_data && *dmi_data ? dmi_data : "?"; | |
e70c9d5e | 133 | } |
1da177e4 LT |
134 | |
135 | /* | |
136 | * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. | |
137 | */ | |
8378b924 | 138 | static int i8k_smm(struct smm_regs *regs) |
1da177e4 | 139 | { |
dec63ec3 DT |
140 | int rc; |
141 | int eax = regs->eax; | |
f36fdb9f GR |
142 | cpumask_var_t old_mask; |
143 | ||
144 | /* SMM requires CPU 0 */ | |
145 | if (!alloc_cpumask_var(&old_mask, GFP_KERNEL)) | |
146 | return -ENOMEM; | |
147 | cpumask_copy(old_mask, ¤t->cpus_allowed); | |
6d827fbc GR |
148 | rc = set_cpus_allowed_ptr(current, cpumask_of(0)); |
149 | if (rc) | |
150 | goto out; | |
f36fdb9f GR |
151 | if (smp_processor_id() != 0) { |
152 | rc = -EBUSY; | |
153 | goto out; | |
154 | } | |
dec63ec3 | 155 | |
fe04f22f | 156 | #if defined(CONFIG_X86_64) |
22d3243d | 157 | asm volatile("pushq %%rax\n\t" |
fe04f22f BS |
158 | "movl 0(%%rax),%%edx\n\t" |
159 | "pushq %%rdx\n\t" | |
160 | "movl 4(%%rax),%%ebx\n\t" | |
161 | "movl 8(%%rax),%%ecx\n\t" | |
162 | "movl 12(%%rax),%%edx\n\t" | |
163 | "movl 16(%%rax),%%esi\n\t" | |
164 | "movl 20(%%rax),%%edi\n\t" | |
165 | "popq %%rax\n\t" | |
166 | "out %%al,$0xb2\n\t" | |
167 | "out %%al,$0x84\n\t" | |
168 | "xchgq %%rax,(%%rsp)\n\t" | |
169 | "movl %%ebx,4(%%rax)\n\t" | |
170 | "movl %%ecx,8(%%rax)\n\t" | |
171 | "movl %%edx,12(%%rax)\n\t" | |
172 | "movl %%esi,16(%%rax)\n\t" | |
173 | "movl %%edi,20(%%rax)\n\t" | |
174 | "popq %%rdx\n\t" | |
175 | "movl %%edx,0(%%rax)\n\t" | |
bc1f419c LT |
176 | "pushfq\n\t" |
177 | "popq %%rax\n\t" | |
fe04f22f | 178 | "andl $1,%%eax\n" |
12186f51 | 179 | : "=a"(rc) |
fe04f22f BS |
180 | : "a"(regs) |
181 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
182 | #else | |
22d3243d | 183 | asm volatile("pushl %%eax\n\t" |
dec63ec3 DT |
184 | "movl 0(%%eax),%%edx\n\t" |
185 | "push %%edx\n\t" | |
186 | "movl 4(%%eax),%%ebx\n\t" | |
187 | "movl 8(%%eax),%%ecx\n\t" | |
188 | "movl 12(%%eax),%%edx\n\t" | |
189 | "movl 16(%%eax),%%esi\n\t" | |
190 | "movl 20(%%eax),%%edi\n\t" | |
191 | "popl %%eax\n\t" | |
192 | "out %%al,$0xb2\n\t" | |
193 | "out %%al,$0x84\n\t" | |
194 | "xchgl %%eax,(%%esp)\n\t" | |
195 | "movl %%ebx,4(%%eax)\n\t" | |
196 | "movl %%ecx,8(%%eax)\n\t" | |
197 | "movl %%edx,12(%%eax)\n\t" | |
198 | "movl %%esi,16(%%eax)\n\t" | |
199 | "movl %%edi,20(%%eax)\n\t" | |
200 | "popl %%edx\n\t" | |
201 | "movl %%edx,0(%%eax)\n\t" | |
202 | "lahf\n\t" | |
203 | "shrl $8,%%eax\n\t" | |
6b4e81db | 204 | "andl $1,%%eax\n" |
12186f51 | 205 | : "=a"(rc) |
dec63ec3 DT |
206 | : "a"(regs) |
207 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
fe04f22f | 208 | #endif |
8378b924 | 209 | if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
f36fdb9f | 210 | rc = -EINVAL; |
dec63ec3 | 211 | |
f36fdb9f GR |
212 | out: |
213 | set_cpus_allowed_ptr(current, old_mask); | |
214 | free_cpumask_var(old_mask); | |
215 | return rc; | |
1da177e4 LT |
216 | } |
217 | ||
1da177e4 LT |
218 | /* |
219 | * Read the Fn key status. | |
220 | */ | |
221 | static int i8k_get_fn_status(void) | |
222 | { | |
8378b924 | 223 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; |
dec63ec3 DT |
224 | int rc; |
225 | ||
12186f51 GR |
226 | rc = i8k_smm(®s); |
227 | if (rc < 0) | |
dec63ec3 | 228 | return rc; |
dec63ec3 DT |
229 | |
230 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { | |
231 | case I8K_FN_UP: | |
232 | return I8K_VOL_UP; | |
233 | case I8K_FN_DOWN: | |
234 | return I8K_VOL_DOWN; | |
235 | case I8K_FN_MUTE: | |
236 | return I8K_VOL_MUTE; | |
237 | default: | |
238 | return 0; | |
239 | } | |
1da177e4 LT |
240 | } |
241 | ||
242 | /* | |
243 | * Read the power status. | |
244 | */ | |
245 | static int i8k_get_power_status(void) | |
246 | { | |
8378b924 | 247 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; |
dec63ec3 DT |
248 | int rc; |
249 | ||
12186f51 GR |
250 | rc = i8k_smm(®s); |
251 | if (rc < 0) | |
dec63ec3 | 252 | return rc; |
dec63ec3 | 253 | |
8378b924 | 254 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; |
1da177e4 LT |
255 | } |
256 | ||
257 | /* | |
258 | * Read the fan status. | |
259 | */ | |
260 | static int i8k_get_fan_status(int fan) | |
261 | { | |
8378b924 | 262 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
1da177e4 | 263 | |
dec63ec3 | 264 | regs.ebx = fan & 0xff; |
8378b924 | 265 | return i8k_smm(®s) ? : regs.eax & 0xff; |
1da177e4 LT |
266 | } |
267 | ||
268 | /* | |
269 | * Read the fan speed in RPM. | |
270 | */ | |
271 | static int i8k_get_fan_speed(int fan) | |
272 | { | |
8378b924 | 273 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
1da177e4 | 274 | |
dec63ec3 | 275 | regs.ebx = fan & 0xff; |
26d09382 | 276 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; |
1da177e4 LT |
277 | } |
278 | ||
279 | /* | |
280 | * Set the fan speed (off, low, high). Returns the new fan status. | |
281 | */ | |
282 | static int i8k_set_fan(int fan, int speed) | |
283 | { | |
8378b924 | 284 | struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
1da177e4 | 285 | |
81474fc2 | 286 | speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed); |
dec63ec3 | 287 | regs.ebx = (fan & 0xff) | (speed << 8); |
1da177e4 | 288 | |
8378b924 | 289 | return i8k_smm(®s) ? : i8k_get_fan_status(fan); |
1da177e4 LT |
290 | } |
291 | ||
5114b474 PR |
292 | static int i8k_get_temp_type(int sensor) |
293 | { | |
294 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP_TYPE, }; | |
295 | ||
296 | regs.ebx = sensor & 0xff; | |
297 | return i8k_smm(®s) ? : regs.eax & 0xff; | |
298 | } | |
299 | ||
1da177e4 LT |
300 | /* |
301 | * Read the cpu temperature. | |
302 | */ | |
7e0fa31d | 303 | static int i8k_get_temp(int sensor) |
1da177e4 | 304 | { |
8378b924 | 305 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP, }; |
dec63ec3 DT |
306 | int rc; |
307 | int temp; | |
1da177e4 LT |
308 | |
309 | #ifdef I8K_TEMPERATURE_BUG | |
723493ca | 310 | static int prev[4] = { I8K_MAX_TEMP+1, I8K_MAX_TEMP+1, I8K_MAX_TEMP+1, I8K_MAX_TEMP+1 }; |
1da177e4 | 311 | #endif |
7e0fa31d | 312 | regs.ebx = sensor & 0xff; |
12186f51 GR |
313 | rc = i8k_smm(®s); |
314 | if (rc < 0) | |
dec63ec3 | 315 | return rc; |
8378b924 | 316 | |
dec63ec3 | 317 | temp = regs.eax & 0xff; |
1da177e4 LT |
318 | |
319 | #ifdef I8K_TEMPERATURE_BUG | |
dec63ec3 DT |
320 | /* |
321 | * Sometimes the temperature sensor returns 0x99, which is out of range. | |
322 | * In this case we return (once) the previous cached value. For example: | |
323 | # 1003655137 00000058 00005a4b | |
324 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees | |
325 | # 1003655139 00000054 00005c52 | |
326 | */ | |
327 | if (temp > I8K_MAX_TEMP) { | |
d83c39de | 328 | temp = prev[sensor]; |
723493ca | 329 | prev[sensor] = I8K_MAX_TEMP+1; |
dec63ec3 | 330 | } else { |
d83c39de | 331 | prev[sensor] = temp; |
dec63ec3 | 332 | } |
723493ca | 333 | if (temp > I8K_MAX_TEMP) |
83d514d7 | 334 | return -ENODATA; |
1da177e4 LT |
335 | #endif |
336 | ||
dec63ec3 | 337 | return temp; |
1da177e4 LT |
338 | } |
339 | ||
7e0fa31d | 340 | static int i8k_get_dell_signature(int req_fn) |
1da177e4 | 341 | { |
7e0fa31d | 342 | struct smm_regs regs = { .eax = req_fn, }; |
dec63ec3 | 343 | int rc; |
1da177e4 | 344 | |
12186f51 GR |
345 | rc = i8k_smm(®s); |
346 | if (rc < 0) | |
dec63ec3 | 347 | return rc; |
1da177e4 | 348 | |
8378b924 | 349 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
1da177e4 LT |
350 | } |
351 | ||
d79b6f4d FW |
352 | static int |
353 | i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 354 | { |
e70c9d5e | 355 | int val = 0; |
dec63ec3 DT |
356 | int speed; |
357 | unsigned char buff[16]; | |
358 | int __user *argp = (int __user *)arg; | |
359 | ||
360 | if (!argp) | |
361 | return -EINVAL; | |
362 | ||
363 | switch (cmd) { | |
364 | case I8K_BIOS_VERSION: | |
e551b152 GR |
365 | val = (bios_version[0] << 16) | |
366 | (bios_version[1] << 8) | bios_version[2]; | |
dec63ec3 DT |
367 | break; |
368 | ||
369 | case I8K_MACHINE_ID: | |
370 | memset(buff, 0, 16); | |
12186f51 GR |
371 | strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
372 | sizeof(buff)); | |
dec63ec3 DT |
373 | break; |
374 | ||
375 | case I8K_FN_STATUS: | |
376 | val = i8k_get_fn_status(); | |
377 | break; | |
378 | ||
379 | case I8K_POWER_STATUS: | |
380 | val = i8k_get_power_status(); | |
381 | break; | |
382 | ||
383 | case I8K_GET_TEMP: | |
7e0fa31d | 384 | val = i8k_get_temp(0); |
dec63ec3 DT |
385 | break; |
386 | ||
387 | case I8K_GET_SPEED: | |
8378b924 | 388 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 389 | return -EFAULT; |
8378b924 | 390 | |
dec63ec3 DT |
391 | val = i8k_get_fan_speed(val); |
392 | break; | |
1da177e4 | 393 | |
dec63ec3 | 394 | case I8K_GET_FAN: |
8378b924 | 395 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 396 | return -EFAULT; |
8378b924 | 397 | |
dec63ec3 DT |
398 | val = i8k_get_fan_status(val); |
399 | break; | |
1da177e4 | 400 | |
dec63ec3 | 401 | case I8K_SET_FAN: |
8378b924 | 402 | if (restricted && !capable(CAP_SYS_ADMIN)) |
dec63ec3 | 403 | return -EPERM; |
8378b924 DT |
404 | |
405 | if (copy_from_user(&val, argp, sizeof(int))) | |
dec63ec3 | 406 | return -EFAULT; |
8378b924 DT |
407 | |
408 | if (copy_from_user(&speed, argp + 1, sizeof(int))) | |
dec63ec3 | 409 | return -EFAULT; |
8378b924 | 410 | |
dec63ec3 DT |
411 | val = i8k_set_fan(val, speed); |
412 | break; | |
1da177e4 | 413 | |
dec63ec3 DT |
414 | default: |
415 | return -EINVAL; | |
1da177e4 | 416 | } |
1da177e4 | 417 | |
8378b924 | 418 | if (val < 0) |
dec63ec3 | 419 | return val; |
1da177e4 | 420 | |
dec63ec3 DT |
421 | switch (cmd) { |
422 | case I8K_BIOS_VERSION: | |
8378b924 | 423 | if (copy_to_user(argp, &val, 4)) |
dec63ec3 | 424 | return -EFAULT; |
8378b924 | 425 | |
dec63ec3 DT |
426 | break; |
427 | case I8K_MACHINE_ID: | |
8378b924 | 428 | if (copy_to_user(argp, buff, 16)) |
dec63ec3 | 429 | return -EFAULT; |
8378b924 | 430 | |
dec63ec3 DT |
431 | break; |
432 | default: | |
8378b924 | 433 | if (copy_to_user(argp, &val, sizeof(int))) |
dec63ec3 | 434 | return -EFAULT; |
8378b924 | 435 | |
dec63ec3 | 436 | break; |
1da177e4 | 437 | } |
1da177e4 | 438 | |
dec63ec3 | 439 | return 0; |
1da177e4 LT |
440 | } |
441 | ||
d79b6f4d FW |
442 | static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
443 | { | |
444 | long ret; | |
445 | ||
613655fa | 446 | mutex_lock(&i8k_mutex); |
d79b6f4d | 447 | ret = i8k_ioctl_unlocked(fp, cmd, arg); |
613655fa | 448 | mutex_unlock(&i8k_mutex); |
d79b6f4d FW |
449 | |
450 | return ret; | |
451 | } | |
452 | ||
1da177e4 LT |
453 | /* |
454 | * Print the information for /proc/i8k. | |
455 | */ | |
352f8f8b | 456 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
1da177e4 | 457 | { |
352f8f8b | 458 | int fn_key, cpu_temp, ac_power; |
dec63ec3 DT |
459 | int left_fan, right_fan, left_speed, right_speed; |
460 | ||
96de0e25 JE |
461 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
462 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ | |
463 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ | |
464 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ | |
465 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ | |
466 | fn_key = i8k_get_fn_status(); /* 750 µs */ | |
8378b924 | 467 | if (power_status) |
96de0e25 | 468 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
8378b924 | 469 | else |
dec63ec3 | 470 | ac_power = -1; |
dec63ec3 DT |
471 | |
472 | /* | |
473 | * Info: | |
474 | * | |
475 | * 1) Format version (this will change if format changes) | |
476 | * 2) BIOS version | |
477 | * 3) BIOS machine ID | |
478 | * 4) Cpu temperature | |
479 | * 5) Left fan status | |
480 | * 6) Right fan status | |
481 | * 7) Left fan speed | |
482 | * 8) Right fan speed | |
483 | * 9) AC power | |
484 | * 10) Fn Key status | |
485 | */ | |
352f8f8b DT |
486 | return seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
487 | I8K_PROC_FMT, | |
488 | bios_version, | |
4f005551 | 489 | i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
352f8f8b DT |
490 | cpu_temp, |
491 | left_fan, right_fan, left_speed, right_speed, | |
492 | ac_power, fn_key); | |
1da177e4 LT |
493 | } |
494 | ||
352f8f8b | 495 | static int i8k_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 496 | { |
352f8f8b | 497 | return single_open(file, i8k_proc_show, NULL); |
1da177e4 LT |
498 | } |
499 | ||
949a9d70 JD |
500 | |
501 | /* | |
502 | * Hwmon interface | |
503 | */ | |
504 | ||
5114b474 PR |
505 | static ssize_t i8k_hwmon_show_temp_label(struct device *dev, |
506 | struct device_attribute *devattr, | |
507 | char *buf) | |
508 | { | |
509 | static const char * const labels[] = { | |
510 | "CPU", | |
511 | "GPU", | |
512 | "SODIMM", | |
513 | "Other", | |
514 | "Ambient", | |
515 | "Other", | |
516 | }; | |
517 | int index = to_sensor_dev_attr(devattr)->index; | |
518 | int type; | |
519 | ||
520 | type = i8k_get_temp_type(index); | |
521 | if (type < 0) | |
522 | return type; | |
523 | if (type >= ARRAY_SIZE(labels)) | |
524 | type = ARRAY_SIZE(labels) - 1; | |
525 | return sprintf(buf, "%s\n", labels[type]); | |
526 | } | |
527 | ||
949a9d70 JD |
528 | static ssize_t i8k_hwmon_show_temp(struct device *dev, |
529 | struct device_attribute *devattr, | |
530 | char *buf) | |
531 | { | |
d83c39de GR |
532 | int index = to_sensor_dev_attr(devattr)->index; |
533 | int temp; | |
949a9d70 | 534 | |
d83c39de GR |
535 | temp = i8k_get_temp(index); |
536 | if (temp < 0) | |
537 | return temp; | |
538 | return sprintf(buf, "%d\n", temp * 1000); | |
949a9d70 JD |
539 | } |
540 | ||
541 | static ssize_t i8k_hwmon_show_fan(struct device *dev, | |
542 | struct device_attribute *devattr, | |
543 | char *buf) | |
544 | { | |
545 | int index = to_sensor_dev_attr(devattr)->index; | |
546 | int fan_speed; | |
547 | ||
548 | fan_speed = i8k_get_fan_speed(index); | |
549 | if (fan_speed < 0) | |
550 | return fan_speed; | |
551 | return sprintf(buf, "%d\n", fan_speed); | |
552 | } | |
553 | ||
e7f5f275 GR |
554 | static ssize_t i8k_hwmon_show_pwm(struct device *dev, |
555 | struct device_attribute *devattr, | |
556 | char *buf) | |
557 | { | |
558 | int index = to_sensor_dev_attr(devattr)->index; | |
559 | int status; | |
560 | ||
561 | status = i8k_get_fan_status(index); | |
562 | if (status < 0) | |
563 | return -EIO; | |
81474fc2 | 564 | return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255)); |
e7f5f275 GR |
565 | } |
566 | ||
567 | static ssize_t i8k_hwmon_set_pwm(struct device *dev, | |
568 | struct device_attribute *attr, | |
569 | const char *buf, size_t count) | |
570 | { | |
571 | int index = to_sensor_dev_attr(attr)->index; | |
572 | unsigned long val; | |
573 | int err; | |
574 | ||
575 | err = kstrtoul(buf, 10, &val); | |
576 | if (err) | |
577 | return err; | |
81474fc2 | 578 | val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max); |
e7f5f275 GR |
579 | |
580 | mutex_lock(&i8k_mutex); | |
581 | err = i8k_set_fan(index, val); | |
582 | mutex_unlock(&i8k_mutex); | |
583 | ||
584 | return err < 0 ? -EIO : count; | |
585 | } | |
586 | ||
d83c39de | 587 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0); |
5114b474 PR |
588 | static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
589 | 0); | |
d83c39de | 590 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1); |
5114b474 PR |
591 | static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
592 | 1); | |
d83c39de | 593 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2); |
5114b474 PR |
594 | static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
595 | 2); | |
d83c39de | 596 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 3); |
5114b474 PR |
597 | static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL, |
598 | 3); | |
949a9d70 JD |
599 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
600 | I8K_FAN_LEFT); | |
e7f5f275 GR |
601 | static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
602 | i8k_hwmon_set_pwm, I8K_FAN_LEFT); | |
949a9d70 JD |
603 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
604 | I8K_FAN_RIGHT); | |
e7f5f275 GR |
605 | static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
606 | i8k_hwmon_set_pwm, I8K_FAN_RIGHT); | |
82ba1d3f GR |
607 | |
608 | static struct attribute *i8k_attrs[] = { | |
d83c39de | 609 | &sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */ |
5114b474 PR |
610 | &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */ |
611 | &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */ | |
612 | &sensor_dev_attr_temp2_label.dev_attr.attr, /* 3 */ | |
613 | &sensor_dev_attr_temp3_input.dev_attr.attr, /* 4 */ | |
614 | &sensor_dev_attr_temp3_label.dev_attr.attr, /* 5 */ | |
615 | &sensor_dev_attr_temp4_input.dev_attr.attr, /* 6 */ | |
616 | &sensor_dev_attr_temp4_label.dev_attr.attr, /* 7 */ | |
617 | &sensor_dev_attr_fan1_input.dev_attr.attr, /* 8 */ | |
618 | &sensor_dev_attr_pwm1.dev_attr.attr, /* 9 */ | |
619 | &sensor_dev_attr_fan2_input.dev_attr.attr, /* 10 */ | |
620 | &sensor_dev_attr_pwm2.dev_attr.attr, /* 11 */ | |
82ba1d3f GR |
621 | NULL |
622 | }; | |
949a9d70 | 623 | |
82ba1d3f GR |
624 | static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, |
625 | int index) | |
949a9d70 | 626 | { |
5114b474 PR |
627 | if (index >= 0 && index <= 1 && |
628 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1)) | |
82ba1d3f | 629 | return 0; |
5114b474 PR |
630 | if (index >= 2 && index <= 3 && |
631 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2)) | |
d83c39de | 632 | return 0; |
5114b474 PR |
633 | if (index >= 4 && index <= 5 && |
634 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3)) | |
d83c39de | 635 | return 0; |
5114b474 PR |
636 | if (index >= 6 && index <= 7 && |
637 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4)) | |
d83c39de | 638 | return 0; |
5114b474 | 639 | if (index >= 8 && index <= 9 && |
82ba1d3f GR |
640 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1)) |
641 | return 0; | |
5114b474 | 642 | if (index >= 10 && index <= 11 && |
82ba1d3f GR |
643 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) |
644 | return 0; | |
645 | ||
646 | return attr->mode; | |
949a9d70 JD |
647 | } |
648 | ||
82ba1d3f GR |
649 | static const struct attribute_group i8k_group = { |
650 | .attrs = i8k_attrs, | |
651 | .is_visible = i8k_is_visible, | |
652 | }; | |
653 | __ATTRIBUTE_GROUPS(i8k); | |
654 | ||
949a9d70 JD |
655 | static int __init i8k_init_hwmon(void) |
656 | { | |
657 | int err; | |
658 | ||
82ba1d3f | 659 | i8k_hwmon_flags = 0; |
949a9d70 | 660 | |
672af223 PR |
661 | /* CPU temperature attributes, if temperature type is OK */ |
662 | err = i8k_get_temp_type(0); | |
663 | if (err >= 0) | |
82ba1d3f | 664 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1; |
d83c39de | 665 | /* check for additional temperature sensors */ |
672af223 PR |
666 | err = i8k_get_temp_type(1); |
667 | if (err >= 0) | |
d83c39de | 668 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2; |
672af223 PR |
669 | err = i8k_get_temp_type(2); |
670 | if (err >= 0) | |
d83c39de | 671 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3; |
672af223 PR |
672 | err = i8k_get_temp_type(3); |
673 | if (err >= 0) | |
d83c39de | 674 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4; |
949a9d70 JD |
675 | |
676 | /* Left fan attributes, if left fan is present */ | |
677 | err = i8k_get_fan_status(I8K_FAN_LEFT); | |
82ba1d3f GR |
678 | if (err >= 0) |
679 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1; | |
949a9d70 JD |
680 | |
681 | /* Right fan attributes, if right fan is present */ | |
682 | err = i8k_get_fan_status(I8K_FAN_RIGHT); | |
82ba1d3f GR |
683 | if (err >= 0) |
684 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2; | |
949a9d70 | 685 | |
82ba1d3f GR |
686 | i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "i8k", NULL, |
687 | i8k_groups); | |
688 | if (IS_ERR(i8k_hwmon_dev)) { | |
689 | err = PTR_ERR(i8k_hwmon_dev); | |
690 | i8k_hwmon_dev = NULL; | |
691 | pr_err("hwmon registration failed (%d)\n", err); | |
692 | return err; | |
693 | } | |
949a9d70 | 694 | return 0; |
949a9d70 JD |
695 | } |
696 | ||
81474fc2 GR |
697 | struct i8k_config_data { |
698 | int fan_mult; | |
699 | int fan_max; | |
700 | }; | |
701 | ||
702 | enum i8k_configs { | |
7b883446 | 703 | DELL_LATITUDE_D520, |
06c88b0d | 704 | DELL_LATITUDE_E6540, |
7b883446 | 705 | DELL_PRECISION_490, |
81474fc2 GR |
706 | DELL_STUDIO, |
707 | DELL_XPS_M140, | |
708 | }; | |
709 | ||
710 | static const struct i8k_config_data i8k_config_data[] = { | |
7b883446 GR |
711 | [DELL_LATITUDE_D520] = { |
712 | .fan_mult = 1, | |
713 | .fan_max = I8K_FAN_TURBO, | |
714 | }, | |
06c88b0d SH |
715 | [DELL_LATITUDE_E6540] = { |
716 | .fan_mult = 1, | |
717 | .fan_max = I8K_FAN_HIGH, | |
718 | }, | |
7b883446 GR |
719 | [DELL_PRECISION_490] = { |
720 | .fan_mult = 1, | |
721 | .fan_max = I8K_FAN_TURBO, | |
722 | }, | |
81474fc2 GR |
723 | [DELL_STUDIO] = { |
724 | .fan_mult = 1, | |
725 | .fan_max = I8K_FAN_HIGH, | |
726 | }, | |
727 | [DELL_XPS_M140] = { | |
728 | .fan_mult = 1, | |
729 | .fan_max = I8K_FAN_HIGH, | |
730 | }, | |
731 | }; | |
732 | ||
12186f51 | 733 | static struct dmi_system_id i8k_dmi_table[] __initdata = { |
e70c9d5e DT |
734 | { |
735 | .ident = "Dell Inspiron", | |
736 | .matches = { | |
737 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
738 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
739 | }, | |
740 | }, | |
741 | { | |
742 | .ident = "Dell Latitude", | |
743 | .matches = { | |
744 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
745 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
746 | }, | |
747 | }, | |
7e0fa31d DT |
748 | { |
749 | .ident = "Dell Inspiron 2", | |
750 | .matches = { | |
751 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
752 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
753 | }, | |
754 | }, | |
7b883446 GR |
755 | { |
756 | .ident = "Dell Latitude D520", | |
757 | .matches = { | |
758 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
759 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"), | |
760 | }, | |
761 | .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520], | |
762 | }, | |
0f352239 PR |
763 | { |
764 | .ident = "Dell Latitude E6440", | |
765 | .matches = { | |
766 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
767 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6440"), | |
768 | }, | |
769 | .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_E6540], | |
770 | }, | |
06c88b0d SH |
771 | { |
772 | .ident = "Dell Latitude E6540", | |
773 | .matches = { | |
774 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
775 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6540"), | |
776 | }, | |
777 | .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_E6540], | |
778 | }, | |
7e0fa31d DT |
779 | { |
780 | .ident = "Dell Latitude 2", | |
781 | .matches = { | |
782 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
783 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
784 | }, | |
785 | }, | |
a9000d03 NW |
786 | { /* UK Inspiron 6400 */ |
787 | .ident = "Dell Inspiron 3", | |
788 | .matches = { | |
789 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
790 | DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), | |
791 | }, | |
792 | }, | |
48103c52 FS |
793 | { |
794 | .ident = "Dell Inspiron 3", | |
795 | .matches = { | |
796 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
797 | DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), | |
798 | }, | |
799 | }, | |
7b883446 GR |
800 | { |
801 | .ident = "Dell Precision 490", | |
802 | .matches = { | |
803 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
804 | DMI_MATCH(DMI_PRODUCT_NAME, | |
805 | "Precision WorkStation 490"), | |
806 | }, | |
807 | .driver_data = (void *)&i8k_config_data[DELL_PRECISION_490], | |
808 | }, | |
7ab21a86 AS |
809 | { |
810 | .ident = "Dell Precision", | |
811 | .matches = { | |
812 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
813 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), | |
814 | }, | |
815 | }, | |
bef2a508 FH |
816 | { |
817 | .ident = "Dell Vostro", | |
818 | .matches = { | |
819 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
820 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), | |
821 | }, | |
822 | }, | |
9aa5b018 AC |
823 | { |
824 | .ident = "Dell XPS421", | |
825 | .matches = { | |
826 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
827 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), | |
828 | }, | |
829 | }, | |
ff457bde GR |
830 | { |
831 | .ident = "Dell Studio", | |
832 | .matches = { | |
833 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
834 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), | |
835 | }, | |
81474fc2 | 836 | .driver_data = (void *)&i8k_config_data[DELL_STUDIO], |
ff457bde | 837 | }, |
919a0304 GR |
838 | { |
839 | .ident = "Dell XPS M140", | |
840 | .matches = { | |
841 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
842 | DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), | |
843 | }, | |
81474fc2 | 844 | .driver_data = (void *)&i8k_config_data[DELL_XPS_M140], |
919a0304 | 845 | }, |
12186f51 | 846 | { } |
e70c9d5e | 847 | }; |
1da177e4 | 848 | |
148b1fda PR |
849 | MODULE_DEVICE_TABLE(dmi, i8k_dmi_table); |
850 | ||
1da177e4 LT |
851 | /* |
852 | * Probe for the presence of a supported laptop. | |
853 | */ | |
854 | static int __init i8k_probe(void) | |
855 | { | |
26d09382 | 856 | const struct dmi_system_id *id; |
dec63ec3 | 857 | |
1da177e4 | 858 | /* |
dec63ec3 | 859 | * Get DMI information |
1da177e4 | 860 | */ |
e70c9d5e DT |
861 | if (!dmi_check_system(i8k_dmi_table)) { |
862 | if (!ignore_dmi && !force) | |
863 | return -ENODEV; | |
864 | ||
60e71aaf GR |
865 | pr_info("not running on a supported Dell system.\n"); |
866 | pr_info("vendor=%s, model=%s, version=%s\n", | |
e70c9d5e DT |
867 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
868 | i8k_get_dmi_data(DMI_PRODUCT_NAME), | |
869 | i8k_get_dmi_data(DMI_BIOS_VERSION)); | |
1da177e4 | 870 | } |
dec63ec3 | 871 | |
12186f51 GR |
872 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), |
873 | sizeof(bios_version)); | |
e70c9d5e | 874 | |
1da177e4 | 875 | /* |
dec63ec3 | 876 | * Get SMM Dell signature |
1da177e4 | 877 | */ |
7e0fa31d DT |
878 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
879 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { | |
60e71aaf | 880 | pr_err("unable to get SMM Dell signature\n"); |
e70c9d5e DT |
881 | if (!force) |
882 | return -ENODEV; | |
1da177e4 | 883 | } |
1da177e4 | 884 | |
26d09382 | 885 | i8k_fan_mult = fan_mult; |
81474fc2 | 886 | i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */ |
26d09382 | 887 | id = dmi_first_match(i8k_dmi_table); |
81474fc2 GR |
888 | if (id && id->driver_data) { |
889 | const struct i8k_config_data *conf = id->driver_data; | |
890 | ||
891 | if (fan_mult == I8K_FAN_MULT && conf->fan_mult) | |
892 | i8k_fan_mult = conf->fan_mult; | |
893 | if (fan_max == I8K_FAN_HIGH && conf->fan_max) | |
894 | i8k_fan_max = conf->fan_max; | |
895 | } | |
896 | i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max); | |
26d09382 | 897 | |
dec63ec3 | 898 | return 0; |
1da177e4 LT |
899 | } |
900 | ||
8378b924 | 901 | static int __init i8k_init(void) |
1da177e4 | 902 | { |
dec63ec3 | 903 | struct proc_dir_entry *proc_i8k; |
949a9d70 | 904 | int err; |
dec63ec3 DT |
905 | |
906 | /* Are we running on an supported laptop? */ | |
e70c9d5e | 907 | if (i8k_probe()) |
dec63ec3 | 908 | return -ENODEV; |
dec63ec3 DT |
909 | |
910 | /* Register the proc entry */ | |
1b502217 | 911 | proc_i8k = proc_create("i8k", 0, NULL, &i8k_fops); |
352f8f8b | 912 | if (!proc_i8k) |
dec63ec3 | 913 | return -ENOENT; |
352f8f8b | 914 | |
949a9d70 JD |
915 | err = i8k_init_hwmon(); |
916 | if (err) | |
917 | goto exit_remove_proc; | |
918 | ||
dec63ec3 | 919 | return 0; |
949a9d70 JD |
920 | |
921 | exit_remove_proc: | |
922 | remove_proc_entry("i8k", NULL); | |
923 | return err; | |
1da177e4 LT |
924 | } |
925 | ||
8378b924 | 926 | static void __exit i8k_exit(void) |
1da177e4 | 927 | { |
82ba1d3f | 928 | hwmon_device_unregister(i8k_hwmon_dev); |
dec63ec3 | 929 | remove_proc_entry("i8k", NULL); |
1da177e4 | 930 | } |
1da177e4 | 931 | |
8378b924 DT |
932 | module_init(i8k_init); |
933 | module_exit(i8k_exit); |