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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 JD |
6 | * Hwmon integration: |
7 | * Copyright (C) 2011 Jean Delvare <khali@linux-fr.org> | |
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 | |
7e0fa31d DT |
45 | #define I8K_SMM_GET_DELL_SIG1 0xfea3 |
46 | #define I8K_SMM_GET_DELL_SIG2 0xffa3 | |
1da177e4 LT |
47 | #define I8K_SMM_BIOS_VERSION 0x00a6 |
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; |
82ba1d3f GR |
69 | |
70 | #define I8K_HWMON_HAVE_TEMP1 (1 << 0) | |
d83c39de GR |
71 | #define I8K_HWMON_HAVE_TEMP2 (1 << 1) |
72 | #define I8K_HWMON_HAVE_TEMP3 (1 << 2) | |
73 | #define I8K_HWMON_HAVE_TEMP4 (1 << 3) | |
74 | #define I8K_HWMON_HAVE_FAN1 (1 << 4) | |
75 | #define I8K_HWMON_HAVE_FAN2 (1 << 5) | |
1da177e4 LT |
76 | |
77 | MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); | |
78 | MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops"); | |
79 | MODULE_LICENSE("GPL"); | |
80 | ||
90ab5ee9 | 81 | static bool force; |
1da177e4 LT |
82 | module_param(force, bool, 0); |
83 | MODULE_PARM_DESC(force, "Force loading without checking for supported models"); | |
84 | ||
90ab5ee9 | 85 | static bool ignore_dmi; |
e70c9d5e DT |
86 | module_param(ignore_dmi, bool, 0); |
87 | MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); | |
88 | ||
90ab5ee9 | 89 | static bool restricted; |
1da177e4 LT |
90 | module_param(restricted, bool, 0); |
91 | MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set"); | |
92 | ||
90ab5ee9 | 93 | static bool power_status; |
1da177e4 LT |
94 | module_param(power_status, bool, 0600); |
95 | MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k"); | |
96 | ||
4ed99a27 JE |
97 | static int fan_mult = I8K_FAN_MULT; |
98 | module_param(fan_mult, int, 0); | |
99 | MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with"); | |
100 | ||
352f8f8b | 101 | static int i8k_open_fs(struct inode *inode, struct file *file); |
d79b6f4d | 102 | static long i8k_ioctl(struct file *, unsigned int, unsigned long); |
1da177e4 | 103 | |
62322d25 | 104 | static const struct file_operations i8k_fops = { |
1b502217 | 105 | .owner = THIS_MODULE, |
352f8f8b DT |
106 | .open = i8k_open_fs, |
107 | .read = seq_read, | |
108 | .llseek = seq_lseek, | |
109 | .release = single_release, | |
d79b6f4d | 110 | .unlocked_ioctl = i8k_ioctl, |
1da177e4 LT |
111 | }; |
112 | ||
8378b924 | 113 | struct smm_regs { |
dec63ec3 | 114 | unsigned int eax; |
12186f51 GR |
115 | unsigned int ebx __packed; |
116 | unsigned int ecx __packed; | |
117 | unsigned int edx __packed; | |
118 | unsigned int esi __packed; | |
119 | unsigned int edi __packed; | |
8378b924 | 120 | }; |
1da177e4 | 121 | |
1855256c | 122 | static inline const char *i8k_get_dmi_data(int field) |
e70c9d5e | 123 | { |
1855256c | 124 | const char *dmi_data = dmi_get_system_info(field); |
4f005551 DT |
125 | |
126 | return dmi_data && *dmi_data ? dmi_data : "?"; | |
e70c9d5e | 127 | } |
1da177e4 LT |
128 | |
129 | /* | |
130 | * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. | |
131 | */ | |
8378b924 | 132 | static int i8k_smm(struct smm_regs *regs) |
1da177e4 | 133 | { |
dec63ec3 DT |
134 | int rc; |
135 | int eax = regs->eax; | |
f36fdb9f GR |
136 | cpumask_var_t old_mask; |
137 | ||
138 | /* SMM requires CPU 0 */ | |
139 | if (!alloc_cpumask_var(&old_mask, GFP_KERNEL)) | |
140 | return -ENOMEM; | |
141 | cpumask_copy(old_mask, ¤t->cpus_allowed); | |
142 | set_cpus_allowed_ptr(current, cpumask_of(0)); | |
143 | if (smp_processor_id() != 0) { | |
144 | rc = -EBUSY; | |
145 | goto out; | |
146 | } | |
dec63ec3 | 147 | |
fe04f22f | 148 | #if defined(CONFIG_X86_64) |
22d3243d | 149 | asm volatile("pushq %%rax\n\t" |
fe04f22f BS |
150 | "movl 0(%%rax),%%edx\n\t" |
151 | "pushq %%rdx\n\t" | |
152 | "movl 4(%%rax),%%ebx\n\t" | |
153 | "movl 8(%%rax),%%ecx\n\t" | |
154 | "movl 12(%%rax),%%edx\n\t" | |
155 | "movl 16(%%rax),%%esi\n\t" | |
156 | "movl 20(%%rax),%%edi\n\t" | |
157 | "popq %%rax\n\t" | |
158 | "out %%al,$0xb2\n\t" | |
159 | "out %%al,$0x84\n\t" | |
160 | "xchgq %%rax,(%%rsp)\n\t" | |
161 | "movl %%ebx,4(%%rax)\n\t" | |
162 | "movl %%ecx,8(%%rax)\n\t" | |
163 | "movl %%edx,12(%%rax)\n\t" | |
164 | "movl %%esi,16(%%rax)\n\t" | |
165 | "movl %%edi,20(%%rax)\n\t" | |
166 | "popq %%rdx\n\t" | |
167 | "movl %%edx,0(%%rax)\n\t" | |
bc1f419c LT |
168 | "pushfq\n\t" |
169 | "popq %%rax\n\t" | |
fe04f22f | 170 | "andl $1,%%eax\n" |
12186f51 | 171 | : "=a"(rc) |
fe04f22f BS |
172 | : "a"(regs) |
173 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
174 | #else | |
22d3243d | 175 | asm volatile("pushl %%eax\n\t" |
dec63ec3 DT |
176 | "movl 0(%%eax),%%edx\n\t" |
177 | "push %%edx\n\t" | |
178 | "movl 4(%%eax),%%ebx\n\t" | |
179 | "movl 8(%%eax),%%ecx\n\t" | |
180 | "movl 12(%%eax),%%edx\n\t" | |
181 | "movl 16(%%eax),%%esi\n\t" | |
182 | "movl 20(%%eax),%%edi\n\t" | |
183 | "popl %%eax\n\t" | |
184 | "out %%al,$0xb2\n\t" | |
185 | "out %%al,$0x84\n\t" | |
186 | "xchgl %%eax,(%%esp)\n\t" | |
187 | "movl %%ebx,4(%%eax)\n\t" | |
188 | "movl %%ecx,8(%%eax)\n\t" | |
189 | "movl %%edx,12(%%eax)\n\t" | |
190 | "movl %%esi,16(%%eax)\n\t" | |
191 | "movl %%edi,20(%%eax)\n\t" | |
192 | "popl %%edx\n\t" | |
193 | "movl %%edx,0(%%eax)\n\t" | |
194 | "lahf\n\t" | |
195 | "shrl $8,%%eax\n\t" | |
6b4e81db | 196 | "andl $1,%%eax\n" |
12186f51 | 197 | : "=a"(rc) |
dec63ec3 DT |
198 | : "a"(regs) |
199 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
fe04f22f | 200 | #endif |
8378b924 | 201 | if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
f36fdb9f | 202 | rc = -EINVAL; |
dec63ec3 | 203 | |
f36fdb9f GR |
204 | out: |
205 | set_cpus_allowed_ptr(current, old_mask); | |
206 | free_cpumask_var(old_mask); | |
207 | return rc; | |
1da177e4 LT |
208 | } |
209 | ||
210 | /* | |
211 | * Read the bios version. Return the version as an integer corresponding | |
212 | * to the ascii value, for example "A17" is returned as 0x00413137. | |
213 | */ | |
214 | static int i8k_get_bios_version(void) | |
215 | { | |
8378b924 | 216 | struct smm_regs regs = { .eax = I8K_SMM_BIOS_VERSION, }; |
1da177e4 | 217 | |
8378b924 | 218 | return i8k_smm(®s) ? : regs.eax; |
1da177e4 LT |
219 | } |
220 | ||
1da177e4 LT |
221 | /* |
222 | * Read the Fn key status. | |
223 | */ | |
224 | static int i8k_get_fn_status(void) | |
225 | { | |
8378b924 | 226 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; |
dec63ec3 DT |
227 | int rc; |
228 | ||
12186f51 GR |
229 | rc = i8k_smm(®s); |
230 | if (rc < 0) | |
dec63ec3 | 231 | return rc; |
dec63ec3 DT |
232 | |
233 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { | |
234 | case I8K_FN_UP: | |
235 | return I8K_VOL_UP; | |
236 | case I8K_FN_DOWN: | |
237 | return I8K_VOL_DOWN; | |
238 | case I8K_FN_MUTE: | |
239 | return I8K_VOL_MUTE; | |
240 | default: | |
241 | return 0; | |
242 | } | |
1da177e4 LT |
243 | } |
244 | ||
245 | /* | |
246 | * Read the power status. | |
247 | */ | |
248 | static int i8k_get_power_status(void) | |
249 | { | |
8378b924 | 250 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; |
dec63ec3 DT |
251 | int rc; |
252 | ||
12186f51 GR |
253 | rc = i8k_smm(®s); |
254 | if (rc < 0) | |
dec63ec3 | 255 | return rc; |
dec63ec3 | 256 | |
8378b924 | 257 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; |
1da177e4 LT |
258 | } |
259 | ||
260 | /* | |
261 | * Read the fan status. | |
262 | */ | |
263 | static int i8k_get_fan_status(int fan) | |
264 | { | |
8378b924 | 265 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
1da177e4 | 266 | |
dec63ec3 | 267 | regs.ebx = fan & 0xff; |
8378b924 | 268 | return i8k_smm(®s) ? : regs.eax & 0xff; |
1da177e4 LT |
269 | } |
270 | ||
271 | /* | |
272 | * Read the fan speed in RPM. | |
273 | */ | |
274 | static int i8k_get_fan_speed(int fan) | |
275 | { | |
8378b924 | 276 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
1da177e4 | 277 | |
dec63ec3 | 278 | regs.ebx = fan & 0xff; |
26d09382 | 279 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; |
1da177e4 LT |
280 | } |
281 | ||
282 | /* | |
283 | * Set the fan speed (off, low, high). Returns the new fan status. | |
284 | */ | |
285 | static int i8k_set_fan(int fan, int speed) | |
286 | { | |
8378b924 | 287 | struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
1da177e4 | 288 | |
dec63ec3 | 289 | speed = (speed < 0) ? 0 : ((speed > I8K_FAN_MAX) ? I8K_FAN_MAX : speed); |
dec63ec3 | 290 | regs.ebx = (fan & 0xff) | (speed << 8); |
1da177e4 | 291 | |
8378b924 | 292 | return i8k_smm(®s) ? : i8k_get_fan_status(fan); |
1da177e4 LT |
293 | } |
294 | ||
295 | /* | |
296 | * Read the cpu temperature. | |
297 | */ | |
7e0fa31d | 298 | static int i8k_get_temp(int sensor) |
1da177e4 | 299 | { |
8378b924 | 300 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP, }; |
dec63ec3 DT |
301 | int rc; |
302 | int temp; | |
1da177e4 LT |
303 | |
304 | #ifdef I8K_TEMPERATURE_BUG | |
d83c39de | 305 | static int prev[4]; |
1da177e4 | 306 | #endif |
7e0fa31d | 307 | regs.ebx = sensor & 0xff; |
12186f51 GR |
308 | rc = i8k_smm(®s); |
309 | if (rc < 0) | |
dec63ec3 | 310 | return rc; |
8378b924 | 311 | |
dec63ec3 | 312 | temp = regs.eax & 0xff; |
1da177e4 LT |
313 | |
314 | #ifdef I8K_TEMPERATURE_BUG | |
dec63ec3 DT |
315 | /* |
316 | * Sometimes the temperature sensor returns 0x99, which is out of range. | |
317 | * In this case we return (once) the previous cached value. For example: | |
318 | # 1003655137 00000058 00005a4b | |
319 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees | |
320 | # 1003655139 00000054 00005c52 | |
321 | */ | |
322 | if (temp > I8K_MAX_TEMP) { | |
d83c39de GR |
323 | temp = prev[sensor]; |
324 | prev[sensor] = I8K_MAX_TEMP; | |
dec63ec3 | 325 | } else { |
d83c39de | 326 | prev[sensor] = temp; |
dec63ec3 | 327 | } |
1da177e4 LT |
328 | #endif |
329 | ||
dec63ec3 | 330 | return temp; |
1da177e4 LT |
331 | } |
332 | ||
7e0fa31d | 333 | static int i8k_get_dell_signature(int req_fn) |
1da177e4 | 334 | { |
7e0fa31d | 335 | struct smm_regs regs = { .eax = req_fn, }; |
dec63ec3 | 336 | int rc; |
1da177e4 | 337 | |
12186f51 GR |
338 | rc = i8k_smm(®s); |
339 | if (rc < 0) | |
dec63ec3 | 340 | return rc; |
1da177e4 | 341 | |
8378b924 | 342 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
1da177e4 LT |
343 | } |
344 | ||
d79b6f4d FW |
345 | static int |
346 | i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 347 | { |
e70c9d5e | 348 | int val = 0; |
dec63ec3 DT |
349 | int speed; |
350 | unsigned char buff[16]; | |
351 | int __user *argp = (int __user *)arg; | |
352 | ||
353 | if (!argp) | |
354 | return -EINVAL; | |
355 | ||
356 | switch (cmd) { | |
357 | case I8K_BIOS_VERSION: | |
358 | val = i8k_get_bios_version(); | |
359 | break; | |
360 | ||
361 | case I8K_MACHINE_ID: | |
362 | memset(buff, 0, 16); | |
12186f51 GR |
363 | strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
364 | sizeof(buff)); | |
dec63ec3 DT |
365 | break; |
366 | ||
367 | case I8K_FN_STATUS: | |
368 | val = i8k_get_fn_status(); | |
369 | break; | |
370 | ||
371 | case I8K_POWER_STATUS: | |
372 | val = i8k_get_power_status(); | |
373 | break; | |
374 | ||
375 | case I8K_GET_TEMP: | |
7e0fa31d | 376 | val = i8k_get_temp(0); |
dec63ec3 DT |
377 | break; |
378 | ||
379 | case I8K_GET_SPEED: | |
8378b924 | 380 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 381 | return -EFAULT; |
8378b924 | 382 | |
dec63ec3 DT |
383 | val = i8k_get_fan_speed(val); |
384 | break; | |
1da177e4 | 385 | |
dec63ec3 | 386 | case I8K_GET_FAN: |
8378b924 | 387 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 388 | return -EFAULT; |
8378b924 | 389 | |
dec63ec3 DT |
390 | val = i8k_get_fan_status(val); |
391 | break; | |
1da177e4 | 392 | |
dec63ec3 | 393 | case I8K_SET_FAN: |
8378b924 | 394 | if (restricted && !capable(CAP_SYS_ADMIN)) |
dec63ec3 | 395 | return -EPERM; |
8378b924 DT |
396 | |
397 | if (copy_from_user(&val, argp, sizeof(int))) | |
dec63ec3 | 398 | return -EFAULT; |
8378b924 DT |
399 | |
400 | if (copy_from_user(&speed, argp + 1, sizeof(int))) | |
dec63ec3 | 401 | return -EFAULT; |
8378b924 | 402 | |
dec63ec3 DT |
403 | val = i8k_set_fan(val, speed); |
404 | break; | |
1da177e4 | 405 | |
dec63ec3 DT |
406 | default: |
407 | return -EINVAL; | |
1da177e4 | 408 | } |
1da177e4 | 409 | |
8378b924 | 410 | if (val < 0) |
dec63ec3 | 411 | return val; |
1da177e4 | 412 | |
dec63ec3 DT |
413 | switch (cmd) { |
414 | case I8K_BIOS_VERSION: | |
8378b924 | 415 | if (copy_to_user(argp, &val, 4)) |
dec63ec3 | 416 | return -EFAULT; |
8378b924 | 417 | |
dec63ec3 DT |
418 | break; |
419 | case I8K_MACHINE_ID: | |
8378b924 | 420 | if (copy_to_user(argp, buff, 16)) |
dec63ec3 | 421 | return -EFAULT; |
8378b924 | 422 | |
dec63ec3 DT |
423 | break; |
424 | default: | |
8378b924 | 425 | if (copy_to_user(argp, &val, sizeof(int))) |
dec63ec3 | 426 | return -EFAULT; |
8378b924 | 427 | |
dec63ec3 | 428 | break; |
1da177e4 | 429 | } |
1da177e4 | 430 | |
dec63ec3 | 431 | return 0; |
1da177e4 LT |
432 | } |
433 | ||
d79b6f4d FW |
434 | static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
435 | { | |
436 | long ret; | |
437 | ||
613655fa | 438 | mutex_lock(&i8k_mutex); |
d79b6f4d | 439 | ret = i8k_ioctl_unlocked(fp, cmd, arg); |
613655fa | 440 | mutex_unlock(&i8k_mutex); |
d79b6f4d FW |
441 | |
442 | return ret; | |
443 | } | |
444 | ||
1da177e4 LT |
445 | /* |
446 | * Print the information for /proc/i8k. | |
447 | */ | |
352f8f8b | 448 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
1da177e4 | 449 | { |
352f8f8b | 450 | int fn_key, cpu_temp, ac_power; |
dec63ec3 DT |
451 | int left_fan, right_fan, left_speed, right_speed; |
452 | ||
96de0e25 JE |
453 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
454 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ | |
455 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ | |
456 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ | |
457 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ | |
458 | fn_key = i8k_get_fn_status(); /* 750 µs */ | |
8378b924 | 459 | if (power_status) |
96de0e25 | 460 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
8378b924 | 461 | else |
dec63ec3 | 462 | ac_power = -1; |
dec63ec3 DT |
463 | |
464 | /* | |
465 | * Info: | |
466 | * | |
467 | * 1) Format version (this will change if format changes) | |
468 | * 2) BIOS version | |
469 | * 3) BIOS machine ID | |
470 | * 4) Cpu temperature | |
471 | * 5) Left fan status | |
472 | * 6) Right fan status | |
473 | * 7) Left fan speed | |
474 | * 8) Right fan speed | |
475 | * 9) AC power | |
476 | * 10) Fn Key status | |
477 | */ | |
352f8f8b DT |
478 | return seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
479 | I8K_PROC_FMT, | |
480 | bios_version, | |
4f005551 | 481 | i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
352f8f8b DT |
482 | cpu_temp, |
483 | left_fan, right_fan, left_speed, right_speed, | |
484 | ac_power, fn_key); | |
1da177e4 LT |
485 | } |
486 | ||
352f8f8b | 487 | static int i8k_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 488 | { |
352f8f8b | 489 | return single_open(file, i8k_proc_show, NULL); |
1da177e4 LT |
490 | } |
491 | ||
949a9d70 JD |
492 | |
493 | /* | |
494 | * Hwmon interface | |
495 | */ | |
496 | ||
497 | static ssize_t i8k_hwmon_show_temp(struct device *dev, | |
498 | struct device_attribute *devattr, | |
499 | char *buf) | |
500 | { | |
d83c39de GR |
501 | int index = to_sensor_dev_attr(devattr)->index; |
502 | int temp; | |
949a9d70 | 503 | |
d83c39de GR |
504 | temp = i8k_get_temp(index); |
505 | if (temp < 0) | |
506 | return temp; | |
507 | return sprintf(buf, "%d\n", temp * 1000); | |
949a9d70 JD |
508 | } |
509 | ||
510 | static ssize_t i8k_hwmon_show_fan(struct device *dev, | |
511 | struct device_attribute *devattr, | |
512 | char *buf) | |
513 | { | |
514 | int index = to_sensor_dev_attr(devattr)->index; | |
515 | int fan_speed; | |
516 | ||
517 | fan_speed = i8k_get_fan_speed(index); | |
518 | if (fan_speed < 0) | |
519 | return fan_speed; | |
520 | return sprintf(buf, "%d\n", fan_speed); | |
521 | } | |
522 | ||
523 | static ssize_t i8k_hwmon_show_label(struct device *dev, | |
524 | struct device_attribute *devattr, | |
525 | char *buf) | |
526 | { | |
82ba1d3f | 527 | static const char *labels[3] = { |
949a9d70 JD |
528 | "CPU", |
529 | "Left Fan", | |
530 | "Right Fan", | |
531 | }; | |
532 | int index = to_sensor_dev_attr(devattr)->index; | |
533 | ||
534 | return sprintf(buf, "%s\n", labels[index]); | |
535 | } | |
536 | ||
d83c39de GR |
537 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0); |
538 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1); | |
539 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2); | |
540 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 3); | |
949a9d70 JD |
541 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
542 | I8K_FAN_LEFT); | |
543 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL, | |
544 | I8K_FAN_RIGHT); | |
82ba1d3f GR |
545 | static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 0); |
546 | static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 1); | |
547 | static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_label, NULL, 2); | |
548 | ||
549 | static struct attribute *i8k_attrs[] = { | |
d83c39de | 550 | &sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */ |
82ba1d3f | 551 | &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */ |
d83c39de GR |
552 | &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */ |
553 | &sensor_dev_attr_temp3_input.dev_attr.attr, /* 3 */ | |
554 | &sensor_dev_attr_temp4_input.dev_attr.attr, /* 4 */ | |
555 | &sensor_dev_attr_fan1_input.dev_attr.attr, /* 5 */ | |
556 | &sensor_dev_attr_fan1_label.dev_attr.attr, /* 6 */ | |
557 | &sensor_dev_attr_fan2_input.dev_attr.attr, /* 7 */ | |
558 | &sensor_dev_attr_fan2_label.dev_attr.attr, /* 8 */ | |
82ba1d3f GR |
559 | NULL |
560 | }; | |
949a9d70 | 561 | |
82ba1d3f GR |
562 | static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, |
563 | int index) | |
949a9d70 | 564 | { |
82ba1d3f GR |
565 | if ((index == 0 || index == 1) && |
566 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1)) | |
567 | return 0; | |
d83c39de GR |
568 | if (index == 2 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2)) |
569 | return 0; | |
570 | if (index == 3 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3)) | |
571 | return 0; | |
572 | if (index == 4 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4)) | |
573 | return 0; | |
574 | if ((index == 5 || index == 6) && | |
82ba1d3f GR |
575 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1)) |
576 | return 0; | |
d83c39de | 577 | if ((index == 7 || index == 8) && |
82ba1d3f GR |
578 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) |
579 | return 0; | |
580 | ||
581 | return attr->mode; | |
949a9d70 JD |
582 | } |
583 | ||
82ba1d3f GR |
584 | static const struct attribute_group i8k_group = { |
585 | .attrs = i8k_attrs, | |
586 | .is_visible = i8k_is_visible, | |
587 | }; | |
588 | __ATTRIBUTE_GROUPS(i8k); | |
589 | ||
949a9d70 JD |
590 | static int __init i8k_init_hwmon(void) |
591 | { | |
592 | int err; | |
593 | ||
82ba1d3f | 594 | i8k_hwmon_flags = 0; |
949a9d70 JD |
595 | |
596 | /* CPU temperature attributes, if temperature reading is OK */ | |
597 | err = i8k_get_temp(0); | |
82ba1d3f GR |
598 | if (err >= 0) |
599 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1; | |
d83c39de GR |
600 | /* check for additional temperature sensors */ |
601 | err = i8k_get_temp(1); | |
602 | if (err >= 0) | |
603 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2; | |
604 | err = i8k_get_temp(2); | |
605 | if (err >= 0) | |
606 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3; | |
607 | err = i8k_get_temp(3); | |
608 | if (err >= 0) | |
609 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4; | |
949a9d70 JD |
610 | |
611 | /* Left fan attributes, if left fan is present */ | |
612 | err = i8k_get_fan_status(I8K_FAN_LEFT); | |
82ba1d3f GR |
613 | if (err >= 0) |
614 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1; | |
949a9d70 JD |
615 | |
616 | /* Right fan attributes, if right fan is present */ | |
617 | err = i8k_get_fan_status(I8K_FAN_RIGHT); | |
82ba1d3f GR |
618 | if (err >= 0) |
619 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2; | |
949a9d70 | 620 | |
82ba1d3f GR |
621 | i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "i8k", NULL, |
622 | i8k_groups); | |
623 | if (IS_ERR(i8k_hwmon_dev)) { | |
624 | err = PTR_ERR(i8k_hwmon_dev); | |
625 | i8k_hwmon_dev = NULL; | |
626 | pr_err("hwmon registration failed (%d)\n", err); | |
627 | return err; | |
628 | } | |
949a9d70 | 629 | return 0; |
949a9d70 JD |
630 | } |
631 | ||
12186f51 | 632 | static struct dmi_system_id i8k_dmi_table[] __initdata = { |
e70c9d5e DT |
633 | { |
634 | .ident = "Dell Inspiron", | |
635 | .matches = { | |
636 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
637 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
638 | }, | |
639 | }, | |
640 | { | |
641 | .ident = "Dell Latitude", | |
642 | .matches = { | |
643 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
644 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
645 | }, | |
646 | }, | |
7e0fa31d DT |
647 | { |
648 | .ident = "Dell Inspiron 2", | |
649 | .matches = { | |
650 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
651 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
652 | }, | |
653 | }, | |
654 | { | |
655 | .ident = "Dell Latitude 2", | |
656 | .matches = { | |
657 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
658 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
659 | }, | |
660 | }, | |
a9000d03 NW |
661 | { /* UK Inspiron 6400 */ |
662 | .ident = "Dell Inspiron 3", | |
663 | .matches = { | |
664 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
665 | DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), | |
666 | }, | |
667 | }, | |
48103c52 FS |
668 | { |
669 | .ident = "Dell Inspiron 3", | |
670 | .matches = { | |
671 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
672 | DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), | |
673 | }, | |
674 | }, | |
7ab21a86 AS |
675 | { |
676 | .ident = "Dell Precision", | |
677 | .matches = { | |
678 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
679 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), | |
680 | }, | |
681 | }, | |
bef2a508 FH |
682 | { |
683 | .ident = "Dell Vostro", | |
684 | .matches = { | |
685 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
686 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), | |
687 | }, | |
688 | }, | |
9aa5b018 AC |
689 | { |
690 | .ident = "Dell XPS421", | |
691 | .matches = { | |
692 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
693 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), | |
694 | }, | |
695 | }, | |
ff457bde GR |
696 | { |
697 | .ident = "Dell Studio", | |
698 | .matches = { | |
699 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
700 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), | |
701 | }, | |
26d09382 | 702 | .driver_data = (void *)1, /* fan multiplier override */ |
ff457bde | 703 | }, |
919a0304 GR |
704 | { |
705 | .ident = "Dell XPS M140", | |
706 | .matches = { | |
707 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
708 | DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), | |
709 | }, | |
26d09382 | 710 | .driver_data = (void *)1, /* fan multiplier override */ |
919a0304 | 711 | }, |
12186f51 | 712 | { } |
e70c9d5e | 713 | }; |
1da177e4 LT |
714 | |
715 | /* | |
716 | * Probe for the presence of a supported laptop. | |
717 | */ | |
718 | static int __init i8k_probe(void) | |
719 | { | |
dec63ec3 DT |
720 | char buff[4]; |
721 | int version; | |
26d09382 | 722 | const struct dmi_system_id *id; |
dec63ec3 | 723 | |
1da177e4 | 724 | /* |
dec63ec3 | 725 | * Get DMI information |
1da177e4 | 726 | */ |
e70c9d5e DT |
727 | if (!dmi_check_system(i8k_dmi_table)) { |
728 | if (!ignore_dmi && !force) | |
729 | return -ENODEV; | |
730 | ||
60e71aaf GR |
731 | pr_info("not running on a supported Dell system.\n"); |
732 | pr_info("vendor=%s, model=%s, version=%s\n", | |
e70c9d5e DT |
733 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
734 | i8k_get_dmi_data(DMI_PRODUCT_NAME), | |
735 | i8k_get_dmi_data(DMI_BIOS_VERSION)); | |
1da177e4 | 736 | } |
dec63ec3 | 737 | |
12186f51 GR |
738 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), |
739 | sizeof(bios_version)); | |
e70c9d5e | 740 | |
1da177e4 | 741 | /* |
dec63ec3 | 742 | * Get SMM Dell signature |
1da177e4 | 743 | */ |
7e0fa31d DT |
744 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
745 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { | |
60e71aaf | 746 | pr_err("unable to get SMM Dell signature\n"); |
e70c9d5e DT |
747 | if (!force) |
748 | return -ENODEV; | |
1da177e4 | 749 | } |
1da177e4 | 750 | |
dec63ec3 DT |
751 | /* |
752 | * Get SMM BIOS version. | |
753 | */ | |
754 | version = i8k_get_bios_version(); | |
755 | if (version <= 0) { | |
60e71aaf | 756 | pr_warn("unable to get SMM BIOS version\n"); |
dec63ec3 | 757 | } else { |
dec63ec3 DT |
758 | buff[0] = (version >> 16) & 0xff; |
759 | buff[1] = (version >> 8) & 0xff; | |
760 | buff[2] = (version) & 0xff; | |
761 | buff[3] = '\0'; | |
762 | /* | |
763 | * If DMI BIOS version is unknown use SMM BIOS version. | |
764 | */ | |
e70c9d5e DT |
765 | if (!dmi_get_system_info(DMI_BIOS_VERSION)) |
766 | strlcpy(bios_version, buff, sizeof(bios_version)); | |
767 | ||
dec63ec3 DT |
768 | /* |
769 | * Check if the two versions match. | |
770 | */ | |
e70c9d5e | 771 | if (strncmp(buff, bios_version, sizeof(bios_version)) != 0) |
60e71aaf | 772 | pr_warn("BIOS version mismatch: %s != %s\n", |
e70c9d5e | 773 | buff, bios_version); |
dec63ec3 | 774 | } |
1da177e4 | 775 | |
26d09382 GR |
776 | i8k_fan_mult = fan_mult; |
777 | id = dmi_first_match(i8k_dmi_table); | |
778 | if (id && fan_mult == I8K_FAN_MULT && id->driver_data) | |
779 | i8k_fan_mult = (unsigned long)id->driver_data; | |
780 | ||
dec63ec3 | 781 | return 0; |
1da177e4 LT |
782 | } |
783 | ||
8378b924 | 784 | static int __init i8k_init(void) |
1da177e4 | 785 | { |
dec63ec3 | 786 | struct proc_dir_entry *proc_i8k; |
949a9d70 | 787 | int err; |
dec63ec3 DT |
788 | |
789 | /* Are we running on an supported laptop? */ | |
e70c9d5e | 790 | if (i8k_probe()) |
dec63ec3 | 791 | return -ENODEV; |
dec63ec3 DT |
792 | |
793 | /* Register the proc entry */ | |
1b502217 | 794 | proc_i8k = proc_create("i8k", 0, NULL, &i8k_fops); |
352f8f8b | 795 | if (!proc_i8k) |
dec63ec3 | 796 | return -ENOENT; |
352f8f8b | 797 | |
949a9d70 JD |
798 | err = i8k_init_hwmon(); |
799 | if (err) | |
800 | goto exit_remove_proc; | |
801 | ||
dec63ec3 | 802 | return 0; |
949a9d70 JD |
803 | |
804 | exit_remove_proc: | |
805 | remove_proc_entry("i8k", NULL); | |
806 | return err; | |
1da177e4 LT |
807 | } |
808 | ||
8378b924 | 809 | static void __exit i8k_exit(void) |
1da177e4 | 810 | { |
82ba1d3f | 811 | hwmon_device_unregister(i8k_hwmon_dev); |
dec63ec3 | 812 | remove_proc_entry("i8k", NULL); |
1da177e4 | 813 | } |
1da177e4 | 814 | |
8378b924 DT |
815 | module_init(i8k_init); |
816 | module_exit(i8k_exit); |