Commit | Line | Data |
---|---|---|
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 | |
7e0fa31d DT |
45 | #define I8K_SMM_GET_DELL_SIG1 0xfea3 |
46 | #define I8K_SMM_GET_DELL_SIG2 0xffa3 | |
1da177e4 LT |
47 | |
48 | #define I8K_FAN_MULT 30 | |
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 | ||
61 | #define I8K_TEMPERATURE_BUG 1 | |
62 | ||
613655fa | 63 | static DEFINE_MUTEX(i8k_mutex); |
e70c9d5e | 64 | static char bios_version[4]; |
949a9d70 | 65 | static struct device *i8k_hwmon_dev; |
82ba1d3f | 66 | static u32 i8k_hwmon_flags; |
26d09382 | 67 | static int i8k_fan_mult; |
81474fc2 GR |
68 | static int i8k_pwm_mult; |
69 | static int i8k_fan_max = I8K_FAN_HIGH; | |
82ba1d3f GR |
70 | |
71 | #define I8K_HWMON_HAVE_TEMP1 (1 << 0) | |
d83c39de GR |
72 | #define I8K_HWMON_HAVE_TEMP2 (1 << 1) |
73 | #define I8K_HWMON_HAVE_TEMP3 (1 << 2) | |
74 | #define I8K_HWMON_HAVE_TEMP4 (1 << 3) | |
75 | #define I8K_HWMON_HAVE_FAN1 (1 << 4) | |
76 | #define I8K_HWMON_HAVE_FAN2 (1 << 5) | |
1da177e4 LT |
77 | |
78 | MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); | |
79 | MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops"); | |
80 | MODULE_LICENSE("GPL"); | |
81 | ||
90ab5ee9 | 82 | static bool force; |
1da177e4 LT |
83 | module_param(force, bool, 0); |
84 | MODULE_PARM_DESC(force, "Force loading without checking for supported models"); | |
85 | ||
90ab5ee9 | 86 | static bool ignore_dmi; |
e70c9d5e DT |
87 | module_param(ignore_dmi, bool, 0); |
88 | MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); | |
89 | ||
90ab5ee9 | 90 | static bool restricted; |
1da177e4 LT |
91 | module_param(restricted, bool, 0); |
92 | MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set"); | |
93 | ||
90ab5ee9 | 94 | static bool power_status; |
1da177e4 LT |
95 | module_param(power_status, bool, 0600); |
96 | MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k"); | |
97 | ||
4ed99a27 JE |
98 | static int fan_mult = I8K_FAN_MULT; |
99 | module_param(fan_mult, int, 0); | |
100 | MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with"); | |
101 | ||
81474fc2 GR |
102 | static int fan_max = I8K_FAN_HIGH; |
103 | module_param(fan_max, int, 0); | |
104 | MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed"); | |
105 | ||
352f8f8b | 106 | static int i8k_open_fs(struct inode *inode, struct file *file); |
d79b6f4d | 107 | static long i8k_ioctl(struct file *, unsigned int, unsigned long); |
1da177e4 | 108 | |
62322d25 | 109 | static const struct file_operations i8k_fops = { |
1b502217 | 110 | .owner = THIS_MODULE, |
352f8f8b DT |
111 | .open = i8k_open_fs, |
112 | .read = seq_read, | |
113 | .llseek = seq_lseek, | |
114 | .release = single_release, | |
d79b6f4d | 115 | .unlocked_ioctl = i8k_ioctl, |
1da177e4 LT |
116 | }; |
117 | ||
8378b924 | 118 | struct smm_regs { |
dec63ec3 | 119 | unsigned int eax; |
12186f51 GR |
120 | unsigned int ebx __packed; |
121 | unsigned int ecx __packed; | |
122 | unsigned int edx __packed; | |
123 | unsigned int esi __packed; | |
124 | unsigned int edi __packed; | |
8378b924 | 125 | }; |
1da177e4 | 126 | |
1855256c | 127 | static inline const char *i8k_get_dmi_data(int field) |
e70c9d5e | 128 | { |
1855256c | 129 | const char *dmi_data = dmi_get_system_info(field); |
4f005551 DT |
130 | |
131 | return dmi_data && *dmi_data ? dmi_data : "?"; | |
e70c9d5e | 132 | } |
1da177e4 LT |
133 | |
134 | /* | |
135 | * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. | |
136 | */ | |
8378b924 | 137 | static int i8k_smm(struct smm_regs *regs) |
1da177e4 | 138 | { |
dec63ec3 DT |
139 | int rc; |
140 | int eax = regs->eax; | |
f36fdb9f GR |
141 | cpumask_var_t old_mask; |
142 | ||
143 | /* SMM requires CPU 0 */ | |
144 | if (!alloc_cpumask_var(&old_mask, GFP_KERNEL)) | |
145 | return -ENOMEM; | |
146 | cpumask_copy(old_mask, ¤t->cpus_allowed); | |
6d827fbc GR |
147 | rc = set_cpus_allowed_ptr(current, cpumask_of(0)); |
148 | if (rc) | |
149 | goto out; | |
f36fdb9f GR |
150 | if (smp_processor_id() != 0) { |
151 | rc = -EBUSY; | |
152 | goto out; | |
153 | } | |
dec63ec3 | 154 | |
fe04f22f | 155 | #if defined(CONFIG_X86_64) |
22d3243d | 156 | asm volatile("pushq %%rax\n\t" |
fe04f22f BS |
157 | "movl 0(%%rax),%%edx\n\t" |
158 | "pushq %%rdx\n\t" | |
159 | "movl 4(%%rax),%%ebx\n\t" | |
160 | "movl 8(%%rax),%%ecx\n\t" | |
161 | "movl 12(%%rax),%%edx\n\t" | |
162 | "movl 16(%%rax),%%esi\n\t" | |
163 | "movl 20(%%rax),%%edi\n\t" | |
164 | "popq %%rax\n\t" | |
165 | "out %%al,$0xb2\n\t" | |
166 | "out %%al,$0x84\n\t" | |
167 | "xchgq %%rax,(%%rsp)\n\t" | |
168 | "movl %%ebx,4(%%rax)\n\t" | |
169 | "movl %%ecx,8(%%rax)\n\t" | |
170 | "movl %%edx,12(%%rax)\n\t" | |
171 | "movl %%esi,16(%%rax)\n\t" | |
172 | "movl %%edi,20(%%rax)\n\t" | |
173 | "popq %%rdx\n\t" | |
174 | "movl %%edx,0(%%rax)\n\t" | |
bc1f419c LT |
175 | "pushfq\n\t" |
176 | "popq %%rax\n\t" | |
fe04f22f | 177 | "andl $1,%%eax\n" |
12186f51 | 178 | : "=a"(rc) |
fe04f22f BS |
179 | : "a"(regs) |
180 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
181 | #else | |
22d3243d | 182 | asm volatile("pushl %%eax\n\t" |
dec63ec3 DT |
183 | "movl 0(%%eax),%%edx\n\t" |
184 | "push %%edx\n\t" | |
185 | "movl 4(%%eax),%%ebx\n\t" | |
186 | "movl 8(%%eax),%%ecx\n\t" | |
187 | "movl 12(%%eax),%%edx\n\t" | |
188 | "movl 16(%%eax),%%esi\n\t" | |
189 | "movl 20(%%eax),%%edi\n\t" | |
190 | "popl %%eax\n\t" | |
191 | "out %%al,$0xb2\n\t" | |
192 | "out %%al,$0x84\n\t" | |
193 | "xchgl %%eax,(%%esp)\n\t" | |
194 | "movl %%ebx,4(%%eax)\n\t" | |
195 | "movl %%ecx,8(%%eax)\n\t" | |
196 | "movl %%edx,12(%%eax)\n\t" | |
197 | "movl %%esi,16(%%eax)\n\t" | |
198 | "movl %%edi,20(%%eax)\n\t" | |
199 | "popl %%edx\n\t" | |
200 | "movl %%edx,0(%%eax)\n\t" | |
201 | "lahf\n\t" | |
202 | "shrl $8,%%eax\n\t" | |
6b4e81db | 203 | "andl $1,%%eax\n" |
12186f51 | 204 | : "=a"(rc) |
dec63ec3 DT |
205 | : "a"(regs) |
206 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
fe04f22f | 207 | #endif |
8378b924 | 208 | if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
f36fdb9f | 209 | rc = -EINVAL; |
dec63ec3 | 210 | |
f36fdb9f GR |
211 | out: |
212 | set_cpus_allowed_ptr(current, old_mask); | |
213 | free_cpumask_var(old_mask); | |
214 | return rc; | |
1da177e4 LT |
215 | } |
216 | ||
1da177e4 LT |
217 | /* |
218 | * Read the Fn key status. | |
219 | */ | |
220 | static int i8k_get_fn_status(void) | |
221 | { | |
8378b924 | 222 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; |
dec63ec3 DT |
223 | int rc; |
224 | ||
12186f51 GR |
225 | rc = i8k_smm(®s); |
226 | if (rc < 0) | |
dec63ec3 | 227 | return rc; |
dec63ec3 DT |
228 | |
229 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { | |
230 | case I8K_FN_UP: | |
231 | return I8K_VOL_UP; | |
232 | case I8K_FN_DOWN: | |
233 | return I8K_VOL_DOWN; | |
234 | case I8K_FN_MUTE: | |
235 | return I8K_VOL_MUTE; | |
236 | default: | |
237 | return 0; | |
238 | } | |
1da177e4 LT |
239 | } |
240 | ||
241 | /* | |
242 | * Read the power status. | |
243 | */ | |
244 | static int i8k_get_power_status(void) | |
245 | { | |
8378b924 | 246 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; |
dec63ec3 DT |
247 | int rc; |
248 | ||
12186f51 GR |
249 | rc = i8k_smm(®s); |
250 | if (rc < 0) | |
dec63ec3 | 251 | return rc; |
dec63ec3 | 252 | |
8378b924 | 253 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; |
1da177e4 LT |
254 | } |
255 | ||
256 | /* | |
257 | * Read the fan status. | |
258 | */ | |
259 | static int i8k_get_fan_status(int fan) | |
260 | { | |
8378b924 | 261 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
1da177e4 | 262 | |
dec63ec3 | 263 | regs.ebx = fan & 0xff; |
8378b924 | 264 | return i8k_smm(®s) ? : regs.eax & 0xff; |
1da177e4 LT |
265 | } |
266 | ||
267 | /* | |
268 | * Read the fan speed in RPM. | |
269 | */ | |
270 | static int i8k_get_fan_speed(int fan) | |
271 | { | |
8378b924 | 272 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
1da177e4 | 273 | |
dec63ec3 | 274 | regs.ebx = fan & 0xff; |
26d09382 | 275 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; |
1da177e4 LT |
276 | } |
277 | ||
278 | /* | |
279 | * Set the fan speed (off, low, high). Returns the new fan status. | |
280 | */ | |
281 | static int i8k_set_fan(int fan, int speed) | |
282 | { | |
8378b924 | 283 | struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
1da177e4 | 284 | |
81474fc2 | 285 | speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed); |
dec63ec3 | 286 | regs.ebx = (fan & 0xff) | (speed << 8); |
1da177e4 | 287 | |
8378b924 | 288 | return i8k_smm(®s) ? : i8k_get_fan_status(fan); |
1da177e4 LT |
289 | } |
290 | ||
291 | /* | |
292 | * Read the cpu temperature. | |
293 | */ | |
7e0fa31d | 294 | static int i8k_get_temp(int sensor) |
1da177e4 | 295 | { |
8378b924 | 296 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP, }; |
dec63ec3 DT |
297 | int rc; |
298 | int temp; | |
1da177e4 LT |
299 | |
300 | #ifdef I8K_TEMPERATURE_BUG | |
d83c39de | 301 | static int prev[4]; |
1da177e4 | 302 | #endif |
7e0fa31d | 303 | regs.ebx = sensor & 0xff; |
12186f51 GR |
304 | rc = i8k_smm(®s); |
305 | if (rc < 0) | |
dec63ec3 | 306 | return rc; |
8378b924 | 307 | |
dec63ec3 | 308 | temp = regs.eax & 0xff; |
1da177e4 LT |
309 | |
310 | #ifdef I8K_TEMPERATURE_BUG | |
dec63ec3 DT |
311 | /* |
312 | * Sometimes the temperature sensor returns 0x99, which is out of range. | |
313 | * In this case we return (once) the previous cached value. For example: | |
314 | # 1003655137 00000058 00005a4b | |
315 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees | |
316 | # 1003655139 00000054 00005c52 | |
317 | */ | |
318 | if (temp > I8K_MAX_TEMP) { | |
d83c39de GR |
319 | temp = prev[sensor]; |
320 | prev[sensor] = I8K_MAX_TEMP; | |
dec63ec3 | 321 | } else { |
d83c39de | 322 | prev[sensor] = temp; |
dec63ec3 | 323 | } |
1da177e4 LT |
324 | #endif |
325 | ||
dec63ec3 | 326 | return temp; |
1da177e4 LT |
327 | } |
328 | ||
7e0fa31d | 329 | static int i8k_get_dell_signature(int req_fn) |
1da177e4 | 330 | { |
7e0fa31d | 331 | struct smm_regs regs = { .eax = req_fn, }; |
dec63ec3 | 332 | int rc; |
1da177e4 | 333 | |
12186f51 GR |
334 | rc = i8k_smm(®s); |
335 | if (rc < 0) | |
dec63ec3 | 336 | return rc; |
1da177e4 | 337 | |
8378b924 | 338 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
1da177e4 LT |
339 | } |
340 | ||
d79b6f4d FW |
341 | static int |
342 | i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 343 | { |
e70c9d5e | 344 | int val = 0; |
dec63ec3 DT |
345 | int speed; |
346 | unsigned char buff[16]; | |
347 | int __user *argp = (int __user *)arg; | |
348 | ||
349 | if (!argp) | |
350 | return -EINVAL; | |
351 | ||
352 | switch (cmd) { | |
353 | case I8K_BIOS_VERSION: | |
e551b152 GR |
354 | val = (bios_version[0] << 16) | |
355 | (bios_version[1] << 8) | bios_version[2]; | |
dec63ec3 DT |
356 | break; |
357 | ||
358 | case I8K_MACHINE_ID: | |
359 | memset(buff, 0, 16); | |
12186f51 GR |
360 | strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
361 | sizeof(buff)); | |
dec63ec3 DT |
362 | break; |
363 | ||
364 | case I8K_FN_STATUS: | |
365 | val = i8k_get_fn_status(); | |
366 | break; | |
367 | ||
368 | case I8K_POWER_STATUS: | |
369 | val = i8k_get_power_status(); | |
370 | break; | |
371 | ||
372 | case I8K_GET_TEMP: | |
7e0fa31d | 373 | val = i8k_get_temp(0); |
dec63ec3 DT |
374 | break; |
375 | ||
376 | case I8K_GET_SPEED: | |
8378b924 | 377 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 378 | return -EFAULT; |
8378b924 | 379 | |
dec63ec3 DT |
380 | val = i8k_get_fan_speed(val); |
381 | break; | |
1da177e4 | 382 | |
dec63ec3 | 383 | case I8K_GET_FAN: |
8378b924 | 384 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 385 | return -EFAULT; |
8378b924 | 386 | |
dec63ec3 DT |
387 | val = i8k_get_fan_status(val); |
388 | break; | |
1da177e4 | 389 | |
dec63ec3 | 390 | case I8K_SET_FAN: |
8378b924 | 391 | if (restricted && !capable(CAP_SYS_ADMIN)) |
dec63ec3 | 392 | return -EPERM; |
8378b924 DT |
393 | |
394 | if (copy_from_user(&val, argp, sizeof(int))) | |
dec63ec3 | 395 | return -EFAULT; |
8378b924 DT |
396 | |
397 | if (copy_from_user(&speed, argp + 1, sizeof(int))) | |
dec63ec3 | 398 | return -EFAULT; |
8378b924 | 399 | |
dec63ec3 DT |
400 | val = i8k_set_fan(val, speed); |
401 | break; | |
1da177e4 | 402 | |
dec63ec3 DT |
403 | default: |
404 | return -EINVAL; | |
1da177e4 | 405 | } |
1da177e4 | 406 | |
8378b924 | 407 | if (val < 0) |
dec63ec3 | 408 | return val; |
1da177e4 | 409 | |
dec63ec3 DT |
410 | switch (cmd) { |
411 | case I8K_BIOS_VERSION: | |
8378b924 | 412 | if (copy_to_user(argp, &val, 4)) |
dec63ec3 | 413 | return -EFAULT; |
8378b924 | 414 | |
dec63ec3 DT |
415 | break; |
416 | case I8K_MACHINE_ID: | |
8378b924 | 417 | if (copy_to_user(argp, buff, 16)) |
dec63ec3 | 418 | return -EFAULT; |
8378b924 | 419 | |
dec63ec3 DT |
420 | break; |
421 | default: | |
8378b924 | 422 | if (copy_to_user(argp, &val, sizeof(int))) |
dec63ec3 | 423 | return -EFAULT; |
8378b924 | 424 | |
dec63ec3 | 425 | break; |
1da177e4 | 426 | } |
1da177e4 | 427 | |
dec63ec3 | 428 | return 0; |
1da177e4 LT |
429 | } |
430 | ||
d79b6f4d FW |
431 | static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
432 | { | |
433 | long ret; | |
434 | ||
613655fa | 435 | mutex_lock(&i8k_mutex); |
d79b6f4d | 436 | ret = i8k_ioctl_unlocked(fp, cmd, arg); |
613655fa | 437 | mutex_unlock(&i8k_mutex); |
d79b6f4d FW |
438 | |
439 | return ret; | |
440 | } | |
441 | ||
1da177e4 LT |
442 | /* |
443 | * Print the information for /proc/i8k. | |
444 | */ | |
352f8f8b | 445 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
1da177e4 | 446 | { |
352f8f8b | 447 | int fn_key, cpu_temp, ac_power; |
dec63ec3 DT |
448 | int left_fan, right_fan, left_speed, right_speed; |
449 | ||
96de0e25 JE |
450 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
451 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ | |
452 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ | |
453 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ | |
454 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ | |
455 | fn_key = i8k_get_fn_status(); /* 750 µs */ | |
8378b924 | 456 | if (power_status) |
96de0e25 | 457 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
8378b924 | 458 | else |
dec63ec3 | 459 | ac_power = -1; |
dec63ec3 DT |
460 | |
461 | /* | |
462 | * Info: | |
463 | * | |
464 | * 1) Format version (this will change if format changes) | |
465 | * 2) BIOS version | |
466 | * 3) BIOS machine ID | |
467 | * 4) Cpu temperature | |
468 | * 5) Left fan status | |
469 | * 6) Right fan status | |
470 | * 7) Left fan speed | |
471 | * 8) Right fan speed | |
472 | * 9) AC power | |
473 | * 10) Fn Key status | |
474 | */ | |
352f8f8b DT |
475 | return seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
476 | I8K_PROC_FMT, | |
477 | bios_version, | |
4f005551 | 478 | i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
352f8f8b DT |
479 | cpu_temp, |
480 | left_fan, right_fan, left_speed, right_speed, | |
481 | ac_power, fn_key); | |
1da177e4 LT |
482 | } |
483 | ||
352f8f8b | 484 | static int i8k_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 485 | { |
352f8f8b | 486 | return single_open(file, i8k_proc_show, NULL); |
1da177e4 LT |
487 | } |
488 | ||
949a9d70 JD |
489 | |
490 | /* | |
491 | * Hwmon interface | |
492 | */ | |
493 | ||
494 | static ssize_t i8k_hwmon_show_temp(struct device *dev, | |
495 | struct device_attribute *devattr, | |
496 | char *buf) | |
497 | { | |
d83c39de GR |
498 | int index = to_sensor_dev_attr(devattr)->index; |
499 | int temp; | |
949a9d70 | 500 | |
d83c39de GR |
501 | temp = i8k_get_temp(index); |
502 | if (temp < 0) | |
503 | return temp; | |
504 | return sprintf(buf, "%d\n", temp * 1000); | |
949a9d70 JD |
505 | } |
506 | ||
507 | static ssize_t i8k_hwmon_show_fan(struct device *dev, | |
508 | struct device_attribute *devattr, | |
509 | char *buf) | |
510 | { | |
511 | int index = to_sensor_dev_attr(devattr)->index; | |
512 | int fan_speed; | |
513 | ||
514 | fan_speed = i8k_get_fan_speed(index); | |
515 | if (fan_speed < 0) | |
516 | return fan_speed; | |
517 | return sprintf(buf, "%d\n", fan_speed); | |
518 | } | |
519 | ||
e7f5f275 GR |
520 | static ssize_t i8k_hwmon_show_pwm(struct device *dev, |
521 | struct device_attribute *devattr, | |
522 | char *buf) | |
523 | { | |
524 | int index = to_sensor_dev_attr(devattr)->index; | |
525 | int status; | |
526 | ||
527 | status = i8k_get_fan_status(index); | |
528 | if (status < 0) | |
529 | return -EIO; | |
81474fc2 | 530 | return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255)); |
e7f5f275 GR |
531 | } |
532 | ||
533 | static ssize_t i8k_hwmon_set_pwm(struct device *dev, | |
534 | struct device_attribute *attr, | |
535 | const char *buf, size_t count) | |
536 | { | |
537 | int index = to_sensor_dev_attr(attr)->index; | |
538 | unsigned long val; | |
539 | int err; | |
540 | ||
541 | err = kstrtoul(buf, 10, &val); | |
542 | if (err) | |
543 | return err; | |
81474fc2 | 544 | val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max); |
e7f5f275 GR |
545 | |
546 | mutex_lock(&i8k_mutex); | |
547 | err = i8k_set_fan(index, val); | |
548 | mutex_unlock(&i8k_mutex); | |
549 | ||
550 | return err < 0 ? -EIO : count; | |
551 | } | |
552 | ||
d83c39de GR |
553 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0); |
554 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1); | |
555 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2); | |
556 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 3); | |
949a9d70 JD |
557 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
558 | I8K_FAN_LEFT); | |
e7f5f275 GR |
559 | static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
560 | i8k_hwmon_set_pwm, I8K_FAN_LEFT); | |
949a9d70 JD |
561 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
562 | I8K_FAN_RIGHT); | |
e7f5f275 GR |
563 | static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
564 | i8k_hwmon_set_pwm, I8K_FAN_RIGHT); | |
82ba1d3f GR |
565 | |
566 | static struct attribute *i8k_attrs[] = { | |
d83c39de | 567 | &sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */ |
b12ce5f2 GR |
568 | &sensor_dev_attr_temp2_input.dev_attr.attr, /* 1 */ |
569 | &sensor_dev_attr_temp3_input.dev_attr.attr, /* 2 */ | |
570 | &sensor_dev_attr_temp4_input.dev_attr.attr, /* 3 */ | |
571 | &sensor_dev_attr_fan1_input.dev_attr.attr, /* 4 */ | |
572 | &sensor_dev_attr_pwm1.dev_attr.attr, /* 5 */ | |
573 | &sensor_dev_attr_fan2_input.dev_attr.attr, /* 6 */ | |
574 | &sensor_dev_attr_pwm2.dev_attr.attr, /* 7 */ | |
82ba1d3f GR |
575 | NULL |
576 | }; | |
949a9d70 | 577 | |
82ba1d3f GR |
578 | static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, |
579 | int index) | |
949a9d70 | 580 | { |
b12ce5f2 | 581 | if (index == 0 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1)) |
82ba1d3f | 582 | return 0; |
b12ce5f2 | 583 | if (index == 1 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2)) |
d83c39de | 584 | return 0; |
b12ce5f2 | 585 | if (index == 2 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3)) |
d83c39de | 586 | return 0; |
b12ce5f2 | 587 | if (index == 3 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4)) |
d83c39de | 588 | return 0; |
b12ce5f2 | 589 | if (index >= 4 && index <= 5 && |
82ba1d3f GR |
590 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1)) |
591 | return 0; | |
b12ce5f2 | 592 | if (index >= 6 && index <= 7 && |
82ba1d3f GR |
593 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) |
594 | return 0; | |
595 | ||
596 | return attr->mode; | |
949a9d70 JD |
597 | } |
598 | ||
82ba1d3f GR |
599 | static const struct attribute_group i8k_group = { |
600 | .attrs = i8k_attrs, | |
601 | .is_visible = i8k_is_visible, | |
602 | }; | |
603 | __ATTRIBUTE_GROUPS(i8k); | |
604 | ||
949a9d70 JD |
605 | static int __init i8k_init_hwmon(void) |
606 | { | |
607 | int err; | |
608 | ||
82ba1d3f | 609 | i8k_hwmon_flags = 0; |
949a9d70 JD |
610 | |
611 | /* CPU temperature attributes, if temperature reading is OK */ | |
612 | err = i8k_get_temp(0); | |
82ba1d3f GR |
613 | if (err >= 0) |
614 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1; | |
d83c39de GR |
615 | /* check for additional temperature sensors */ |
616 | err = i8k_get_temp(1); | |
617 | if (err >= 0) | |
618 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2; | |
619 | err = i8k_get_temp(2); | |
620 | if (err >= 0) | |
621 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3; | |
622 | err = i8k_get_temp(3); | |
623 | if (err >= 0) | |
624 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4; | |
949a9d70 JD |
625 | |
626 | /* Left fan attributes, if left fan is present */ | |
627 | err = i8k_get_fan_status(I8K_FAN_LEFT); | |
82ba1d3f GR |
628 | if (err >= 0) |
629 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1; | |
949a9d70 JD |
630 | |
631 | /* Right fan attributes, if right fan is present */ | |
632 | err = i8k_get_fan_status(I8K_FAN_RIGHT); | |
82ba1d3f GR |
633 | if (err >= 0) |
634 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2; | |
949a9d70 | 635 | |
82ba1d3f GR |
636 | i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "i8k", NULL, |
637 | i8k_groups); | |
638 | if (IS_ERR(i8k_hwmon_dev)) { | |
639 | err = PTR_ERR(i8k_hwmon_dev); | |
640 | i8k_hwmon_dev = NULL; | |
641 | pr_err("hwmon registration failed (%d)\n", err); | |
642 | return err; | |
643 | } | |
949a9d70 | 644 | return 0; |
949a9d70 JD |
645 | } |
646 | ||
81474fc2 GR |
647 | struct i8k_config_data { |
648 | int fan_mult; | |
649 | int fan_max; | |
650 | }; | |
651 | ||
652 | enum i8k_configs { | |
7b883446 | 653 | DELL_LATITUDE_D520, |
06c88b0d | 654 | DELL_LATITUDE_E6540, |
7b883446 | 655 | DELL_PRECISION_490, |
81474fc2 GR |
656 | DELL_STUDIO, |
657 | DELL_XPS_M140, | |
658 | }; | |
659 | ||
660 | static const struct i8k_config_data i8k_config_data[] = { | |
7b883446 GR |
661 | [DELL_LATITUDE_D520] = { |
662 | .fan_mult = 1, | |
663 | .fan_max = I8K_FAN_TURBO, | |
664 | }, | |
06c88b0d SH |
665 | [DELL_LATITUDE_E6540] = { |
666 | .fan_mult = 1, | |
667 | .fan_max = I8K_FAN_HIGH, | |
668 | }, | |
7b883446 GR |
669 | [DELL_PRECISION_490] = { |
670 | .fan_mult = 1, | |
671 | .fan_max = I8K_FAN_TURBO, | |
672 | }, | |
81474fc2 GR |
673 | [DELL_STUDIO] = { |
674 | .fan_mult = 1, | |
675 | .fan_max = I8K_FAN_HIGH, | |
676 | }, | |
677 | [DELL_XPS_M140] = { | |
678 | .fan_mult = 1, | |
679 | .fan_max = I8K_FAN_HIGH, | |
680 | }, | |
681 | }; | |
682 | ||
12186f51 | 683 | static struct dmi_system_id i8k_dmi_table[] __initdata = { |
e70c9d5e DT |
684 | { |
685 | .ident = "Dell Inspiron", | |
686 | .matches = { | |
687 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
688 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
689 | }, | |
690 | }, | |
691 | { | |
692 | .ident = "Dell Latitude", | |
693 | .matches = { | |
694 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
695 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
696 | }, | |
697 | }, | |
7e0fa31d DT |
698 | { |
699 | .ident = "Dell Inspiron 2", | |
700 | .matches = { | |
701 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
702 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
703 | }, | |
704 | }, | |
7b883446 GR |
705 | { |
706 | .ident = "Dell Latitude D520", | |
707 | .matches = { | |
708 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
709 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"), | |
710 | }, | |
711 | .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520], | |
712 | }, | |
06c88b0d SH |
713 | { |
714 | .ident = "Dell Latitude E6540", | |
715 | .matches = { | |
716 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
717 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6540"), | |
718 | }, | |
719 | .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_E6540], | |
720 | }, | |
7e0fa31d DT |
721 | { |
722 | .ident = "Dell Latitude 2", | |
723 | .matches = { | |
724 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
725 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
726 | }, | |
727 | }, | |
a9000d03 NW |
728 | { /* UK Inspiron 6400 */ |
729 | .ident = "Dell Inspiron 3", | |
730 | .matches = { | |
731 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
732 | DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), | |
733 | }, | |
734 | }, | |
48103c52 FS |
735 | { |
736 | .ident = "Dell Inspiron 3", | |
737 | .matches = { | |
738 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
739 | DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), | |
740 | }, | |
741 | }, | |
7b883446 GR |
742 | { |
743 | .ident = "Dell Precision 490", | |
744 | .matches = { | |
745 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
746 | DMI_MATCH(DMI_PRODUCT_NAME, | |
747 | "Precision WorkStation 490"), | |
748 | }, | |
749 | .driver_data = (void *)&i8k_config_data[DELL_PRECISION_490], | |
750 | }, | |
7ab21a86 AS |
751 | { |
752 | .ident = "Dell Precision", | |
753 | .matches = { | |
754 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
755 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), | |
756 | }, | |
757 | }, | |
bef2a508 FH |
758 | { |
759 | .ident = "Dell Vostro", | |
760 | .matches = { | |
761 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
762 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), | |
763 | }, | |
764 | }, | |
9aa5b018 AC |
765 | { |
766 | .ident = "Dell XPS421", | |
767 | .matches = { | |
768 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
769 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), | |
770 | }, | |
771 | }, | |
ff457bde GR |
772 | { |
773 | .ident = "Dell Studio", | |
774 | .matches = { | |
775 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
776 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), | |
777 | }, | |
81474fc2 | 778 | .driver_data = (void *)&i8k_config_data[DELL_STUDIO], |
ff457bde | 779 | }, |
919a0304 GR |
780 | { |
781 | .ident = "Dell XPS M140", | |
782 | .matches = { | |
783 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
784 | DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), | |
785 | }, | |
81474fc2 | 786 | .driver_data = (void *)&i8k_config_data[DELL_XPS_M140], |
919a0304 | 787 | }, |
12186f51 | 788 | { } |
e70c9d5e | 789 | }; |
1da177e4 LT |
790 | |
791 | /* | |
792 | * Probe for the presence of a supported laptop. | |
793 | */ | |
794 | static int __init i8k_probe(void) | |
795 | { | |
26d09382 | 796 | const struct dmi_system_id *id; |
dec63ec3 | 797 | |
1da177e4 | 798 | /* |
dec63ec3 | 799 | * Get DMI information |
1da177e4 | 800 | */ |
e70c9d5e DT |
801 | if (!dmi_check_system(i8k_dmi_table)) { |
802 | if (!ignore_dmi && !force) | |
803 | return -ENODEV; | |
804 | ||
60e71aaf GR |
805 | pr_info("not running on a supported Dell system.\n"); |
806 | pr_info("vendor=%s, model=%s, version=%s\n", | |
e70c9d5e DT |
807 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
808 | i8k_get_dmi_data(DMI_PRODUCT_NAME), | |
809 | i8k_get_dmi_data(DMI_BIOS_VERSION)); | |
1da177e4 | 810 | } |
dec63ec3 | 811 | |
12186f51 GR |
812 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), |
813 | sizeof(bios_version)); | |
e70c9d5e | 814 | |
1da177e4 | 815 | /* |
dec63ec3 | 816 | * Get SMM Dell signature |
1da177e4 | 817 | */ |
7e0fa31d DT |
818 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
819 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { | |
60e71aaf | 820 | pr_err("unable to get SMM Dell signature\n"); |
e70c9d5e DT |
821 | if (!force) |
822 | return -ENODEV; | |
1da177e4 | 823 | } |
1da177e4 | 824 | |
26d09382 | 825 | i8k_fan_mult = fan_mult; |
81474fc2 | 826 | i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */ |
26d09382 | 827 | id = dmi_first_match(i8k_dmi_table); |
81474fc2 GR |
828 | if (id && id->driver_data) { |
829 | const struct i8k_config_data *conf = id->driver_data; | |
830 | ||
831 | if (fan_mult == I8K_FAN_MULT && conf->fan_mult) | |
832 | i8k_fan_mult = conf->fan_mult; | |
833 | if (fan_max == I8K_FAN_HIGH && conf->fan_max) | |
834 | i8k_fan_max = conf->fan_max; | |
835 | } | |
836 | i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max); | |
26d09382 | 837 | |
dec63ec3 | 838 | return 0; |
1da177e4 LT |
839 | } |
840 | ||
8378b924 | 841 | static int __init i8k_init(void) |
1da177e4 | 842 | { |
dec63ec3 | 843 | struct proc_dir_entry *proc_i8k; |
949a9d70 | 844 | int err; |
dec63ec3 DT |
845 | |
846 | /* Are we running on an supported laptop? */ | |
e70c9d5e | 847 | if (i8k_probe()) |
dec63ec3 | 848 | return -ENODEV; |
dec63ec3 DT |
849 | |
850 | /* Register the proc entry */ | |
1b502217 | 851 | proc_i8k = proc_create("i8k", 0, NULL, &i8k_fops); |
352f8f8b | 852 | if (!proc_i8k) |
dec63ec3 | 853 | return -ENOENT; |
352f8f8b | 854 | |
949a9d70 JD |
855 | err = i8k_init_hwmon(); |
856 | if (err) | |
857 | goto exit_remove_proc; | |
858 | ||
dec63ec3 | 859 | return 0; |
949a9d70 JD |
860 | |
861 | exit_remove_proc: | |
862 | remove_proc_entry("i8k", NULL); | |
863 | return err; | |
1da177e4 LT |
864 | } |
865 | ||
8378b924 | 866 | static void __exit i8k_exit(void) |
1da177e4 | 867 | { |
82ba1d3f | 868 | hwmon_device_unregister(i8k_hwmon_dev); |
dec63ec3 | 869 | remove_proc_entry("i8k", NULL); |
1da177e4 | 870 | } |
1da177e4 | 871 | |
8378b924 DT |
872 | module_init(i8k_init); |
873 | module_exit(i8k_exit); |