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; |
82ba1d3f GR |
68 | |
69 | #define I8K_HWMON_HAVE_TEMP1 (1 << 0) | |
d83c39de GR |
70 | #define I8K_HWMON_HAVE_TEMP2 (1 << 1) |
71 | #define I8K_HWMON_HAVE_TEMP3 (1 << 2) | |
72 | #define I8K_HWMON_HAVE_TEMP4 (1 << 3) | |
73 | #define I8K_HWMON_HAVE_FAN1 (1 << 4) | |
74 | #define I8K_HWMON_HAVE_FAN2 (1 << 5) | |
1da177e4 LT |
75 | |
76 | MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)"); | |
77 | MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops"); | |
78 | MODULE_LICENSE("GPL"); | |
79 | ||
90ab5ee9 | 80 | static bool force; |
1da177e4 LT |
81 | module_param(force, bool, 0); |
82 | MODULE_PARM_DESC(force, "Force loading without checking for supported models"); | |
83 | ||
90ab5ee9 | 84 | static bool ignore_dmi; |
e70c9d5e DT |
85 | module_param(ignore_dmi, bool, 0); |
86 | MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match"); | |
87 | ||
90ab5ee9 | 88 | static bool restricted; |
1da177e4 LT |
89 | module_param(restricted, bool, 0); |
90 | MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set"); | |
91 | ||
90ab5ee9 | 92 | static bool power_status; |
1da177e4 LT |
93 | module_param(power_status, bool, 0600); |
94 | MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k"); | |
95 | ||
4ed99a27 JE |
96 | static int fan_mult = I8K_FAN_MULT; |
97 | module_param(fan_mult, int, 0); | |
98 | MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with"); | |
99 | ||
352f8f8b | 100 | static int i8k_open_fs(struct inode *inode, struct file *file); |
d79b6f4d | 101 | static long i8k_ioctl(struct file *, unsigned int, unsigned long); |
1da177e4 | 102 | |
62322d25 | 103 | static const struct file_operations i8k_fops = { |
1b502217 | 104 | .owner = THIS_MODULE, |
352f8f8b DT |
105 | .open = i8k_open_fs, |
106 | .read = seq_read, | |
107 | .llseek = seq_lseek, | |
108 | .release = single_release, | |
d79b6f4d | 109 | .unlocked_ioctl = i8k_ioctl, |
1da177e4 LT |
110 | }; |
111 | ||
8378b924 | 112 | struct smm_regs { |
dec63ec3 | 113 | unsigned int eax; |
12186f51 GR |
114 | unsigned int ebx __packed; |
115 | unsigned int ecx __packed; | |
116 | unsigned int edx __packed; | |
117 | unsigned int esi __packed; | |
118 | unsigned int edi __packed; | |
8378b924 | 119 | }; |
1da177e4 | 120 | |
1855256c | 121 | static inline const char *i8k_get_dmi_data(int field) |
e70c9d5e | 122 | { |
1855256c | 123 | const char *dmi_data = dmi_get_system_info(field); |
4f005551 DT |
124 | |
125 | return dmi_data && *dmi_data ? dmi_data : "?"; | |
e70c9d5e | 126 | } |
1da177e4 LT |
127 | |
128 | /* | |
129 | * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard. | |
130 | */ | |
8378b924 | 131 | static int i8k_smm(struct smm_regs *regs) |
1da177e4 | 132 | { |
dec63ec3 DT |
133 | int rc; |
134 | int eax = regs->eax; | |
f36fdb9f GR |
135 | cpumask_var_t old_mask; |
136 | ||
137 | /* SMM requires CPU 0 */ | |
138 | if (!alloc_cpumask_var(&old_mask, GFP_KERNEL)) | |
139 | return -ENOMEM; | |
140 | cpumask_copy(old_mask, ¤t->cpus_allowed); | |
141 | set_cpus_allowed_ptr(current, cpumask_of(0)); | |
142 | if (smp_processor_id() != 0) { | |
143 | rc = -EBUSY; | |
144 | goto out; | |
145 | } | |
dec63ec3 | 146 | |
fe04f22f | 147 | #if defined(CONFIG_X86_64) |
22d3243d | 148 | asm volatile("pushq %%rax\n\t" |
fe04f22f BS |
149 | "movl 0(%%rax),%%edx\n\t" |
150 | "pushq %%rdx\n\t" | |
151 | "movl 4(%%rax),%%ebx\n\t" | |
152 | "movl 8(%%rax),%%ecx\n\t" | |
153 | "movl 12(%%rax),%%edx\n\t" | |
154 | "movl 16(%%rax),%%esi\n\t" | |
155 | "movl 20(%%rax),%%edi\n\t" | |
156 | "popq %%rax\n\t" | |
157 | "out %%al,$0xb2\n\t" | |
158 | "out %%al,$0x84\n\t" | |
159 | "xchgq %%rax,(%%rsp)\n\t" | |
160 | "movl %%ebx,4(%%rax)\n\t" | |
161 | "movl %%ecx,8(%%rax)\n\t" | |
162 | "movl %%edx,12(%%rax)\n\t" | |
163 | "movl %%esi,16(%%rax)\n\t" | |
164 | "movl %%edi,20(%%rax)\n\t" | |
165 | "popq %%rdx\n\t" | |
166 | "movl %%edx,0(%%rax)\n\t" | |
bc1f419c LT |
167 | "pushfq\n\t" |
168 | "popq %%rax\n\t" | |
fe04f22f | 169 | "andl $1,%%eax\n" |
12186f51 | 170 | : "=a"(rc) |
fe04f22f BS |
171 | : "a"(regs) |
172 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
173 | #else | |
22d3243d | 174 | asm volatile("pushl %%eax\n\t" |
dec63ec3 DT |
175 | "movl 0(%%eax),%%edx\n\t" |
176 | "push %%edx\n\t" | |
177 | "movl 4(%%eax),%%ebx\n\t" | |
178 | "movl 8(%%eax),%%ecx\n\t" | |
179 | "movl 12(%%eax),%%edx\n\t" | |
180 | "movl 16(%%eax),%%esi\n\t" | |
181 | "movl 20(%%eax),%%edi\n\t" | |
182 | "popl %%eax\n\t" | |
183 | "out %%al,$0xb2\n\t" | |
184 | "out %%al,$0x84\n\t" | |
185 | "xchgl %%eax,(%%esp)\n\t" | |
186 | "movl %%ebx,4(%%eax)\n\t" | |
187 | "movl %%ecx,8(%%eax)\n\t" | |
188 | "movl %%edx,12(%%eax)\n\t" | |
189 | "movl %%esi,16(%%eax)\n\t" | |
190 | "movl %%edi,20(%%eax)\n\t" | |
191 | "popl %%edx\n\t" | |
192 | "movl %%edx,0(%%eax)\n\t" | |
193 | "lahf\n\t" | |
194 | "shrl $8,%%eax\n\t" | |
6b4e81db | 195 | "andl $1,%%eax\n" |
12186f51 | 196 | : "=a"(rc) |
dec63ec3 DT |
197 | : "a"(regs) |
198 | : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); | |
fe04f22f | 199 | #endif |
8378b924 | 200 | if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) |
f36fdb9f | 201 | rc = -EINVAL; |
dec63ec3 | 202 | |
f36fdb9f GR |
203 | out: |
204 | set_cpus_allowed_ptr(current, old_mask); | |
205 | free_cpumask_var(old_mask); | |
206 | return rc; | |
1da177e4 LT |
207 | } |
208 | ||
1da177e4 LT |
209 | /* |
210 | * Read the Fn key status. | |
211 | */ | |
212 | static int i8k_get_fn_status(void) | |
213 | { | |
8378b924 | 214 | struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, }; |
dec63ec3 DT |
215 | int rc; |
216 | ||
12186f51 GR |
217 | rc = i8k_smm(®s); |
218 | if (rc < 0) | |
dec63ec3 | 219 | return rc; |
dec63ec3 DT |
220 | |
221 | switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) { | |
222 | case I8K_FN_UP: | |
223 | return I8K_VOL_UP; | |
224 | case I8K_FN_DOWN: | |
225 | return I8K_VOL_DOWN; | |
226 | case I8K_FN_MUTE: | |
227 | return I8K_VOL_MUTE; | |
228 | default: | |
229 | return 0; | |
230 | } | |
1da177e4 LT |
231 | } |
232 | ||
233 | /* | |
234 | * Read the power status. | |
235 | */ | |
236 | static int i8k_get_power_status(void) | |
237 | { | |
8378b924 | 238 | struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, }; |
dec63ec3 DT |
239 | int rc; |
240 | ||
12186f51 GR |
241 | rc = i8k_smm(®s); |
242 | if (rc < 0) | |
dec63ec3 | 243 | return rc; |
dec63ec3 | 244 | |
8378b924 | 245 | return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY; |
1da177e4 LT |
246 | } |
247 | ||
248 | /* | |
249 | * Read the fan status. | |
250 | */ | |
251 | static int i8k_get_fan_status(int fan) | |
252 | { | |
8378b924 | 253 | struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, }; |
1da177e4 | 254 | |
dec63ec3 | 255 | regs.ebx = fan & 0xff; |
8378b924 | 256 | return i8k_smm(®s) ? : regs.eax & 0xff; |
1da177e4 LT |
257 | } |
258 | ||
259 | /* | |
260 | * Read the fan speed in RPM. | |
261 | */ | |
262 | static int i8k_get_fan_speed(int fan) | |
263 | { | |
8378b924 | 264 | struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, }; |
1da177e4 | 265 | |
dec63ec3 | 266 | regs.ebx = fan & 0xff; |
26d09382 | 267 | return i8k_smm(®s) ? : (regs.eax & 0xffff) * i8k_fan_mult; |
1da177e4 LT |
268 | } |
269 | ||
270 | /* | |
271 | * Set the fan speed (off, low, high). Returns the new fan status. | |
272 | */ | |
273 | static int i8k_set_fan(int fan, int speed) | |
274 | { | |
8378b924 | 275 | struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, }; |
1da177e4 | 276 | |
dec63ec3 | 277 | speed = (speed < 0) ? 0 : ((speed > I8K_FAN_MAX) ? I8K_FAN_MAX : speed); |
dec63ec3 | 278 | regs.ebx = (fan & 0xff) | (speed << 8); |
1da177e4 | 279 | |
8378b924 | 280 | return i8k_smm(®s) ? : i8k_get_fan_status(fan); |
1da177e4 LT |
281 | } |
282 | ||
283 | /* | |
284 | * Read the cpu temperature. | |
285 | */ | |
7e0fa31d | 286 | static int i8k_get_temp(int sensor) |
1da177e4 | 287 | { |
8378b924 | 288 | struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP, }; |
dec63ec3 DT |
289 | int rc; |
290 | int temp; | |
1da177e4 LT |
291 | |
292 | #ifdef I8K_TEMPERATURE_BUG | |
d83c39de | 293 | static int prev[4]; |
1da177e4 | 294 | #endif |
7e0fa31d | 295 | regs.ebx = sensor & 0xff; |
12186f51 GR |
296 | rc = i8k_smm(®s); |
297 | if (rc < 0) | |
dec63ec3 | 298 | return rc; |
8378b924 | 299 | |
dec63ec3 | 300 | temp = regs.eax & 0xff; |
1da177e4 LT |
301 | |
302 | #ifdef I8K_TEMPERATURE_BUG | |
dec63ec3 DT |
303 | /* |
304 | * Sometimes the temperature sensor returns 0x99, which is out of range. | |
305 | * In this case we return (once) the previous cached value. For example: | |
306 | # 1003655137 00000058 00005a4b | |
307 | # 1003655138 00000099 00003a80 <--- 0x99 = 153 degrees | |
308 | # 1003655139 00000054 00005c52 | |
309 | */ | |
310 | if (temp > I8K_MAX_TEMP) { | |
d83c39de GR |
311 | temp = prev[sensor]; |
312 | prev[sensor] = I8K_MAX_TEMP; | |
dec63ec3 | 313 | } else { |
d83c39de | 314 | prev[sensor] = temp; |
dec63ec3 | 315 | } |
1da177e4 LT |
316 | #endif |
317 | ||
dec63ec3 | 318 | return temp; |
1da177e4 LT |
319 | } |
320 | ||
7e0fa31d | 321 | static int i8k_get_dell_signature(int req_fn) |
1da177e4 | 322 | { |
7e0fa31d | 323 | struct smm_regs regs = { .eax = req_fn, }; |
dec63ec3 | 324 | int rc; |
1da177e4 | 325 | |
12186f51 GR |
326 | rc = i8k_smm(®s); |
327 | if (rc < 0) | |
dec63ec3 | 328 | return rc; |
1da177e4 | 329 | |
8378b924 | 330 | return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1; |
1da177e4 LT |
331 | } |
332 | ||
d79b6f4d FW |
333 | static int |
334 | i8k_ioctl_unlocked(struct file *fp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 335 | { |
e70c9d5e | 336 | int val = 0; |
dec63ec3 DT |
337 | int speed; |
338 | unsigned char buff[16]; | |
339 | int __user *argp = (int __user *)arg; | |
340 | ||
341 | if (!argp) | |
342 | return -EINVAL; | |
343 | ||
344 | switch (cmd) { | |
345 | case I8K_BIOS_VERSION: | |
e551b152 GR |
346 | val = (bios_version[0] << 16) | |
347 | (bios_version[1] << 8) | bios_version[2]; | |
dec63ec3 DT |
348 | break; |
349 | ||
350 | case I8K_MACHINE_ID: | |
351 | memset(buff, 0, 16); | |
12186f51 GR |
352 | strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
353 | sizeof(buff)); | |
dec63ec3 DT |
354 | break; |
355 | ||
356 | case I8K_FN_STATUS: | |
357 | val = i8k_get_fn_status(); | |
358 | break; | |
359 | ||
360 | case I8K_POWER_STATUS: | |
361 | val = i8k_get_power_status(); | |
362 | break; | |
363 | ||
364 | case I8K_GET_TEMP: | |
7e0fa31d | 365 | val = i8k_get_temp(0); |
dec63ec3 DT |
366 | break; |
367 | ||
368 | case I8K_GET_SPEED: | |
8378b924 | 369 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 370 | return -EFAULT; |
8378b924 | 371 | |
dec63ec3 DT |
372 | val = i8k_get_fan_speed(val); |
373 | break; | |
1da177e4 | 374 | |
dec63ec3 | 375 | case I8K_GET_FAN: |
8378b924 | 376 | if (copy_from_user(&val, argp, sizeof(int))) |
dec63ec3 | 377 | return -EFAULT; |
8378b924 | 378 | |
dec63ec3 DT |
379 | val = i8k_get_fan_status(val); |
380 | break; | |
1da177e4 | 381 | |
dec63ec3 | 382 | case I8K_SET_FAN: |
8378b924 | 383 | if (restricted && !capable(CAP_SYS_ADMIN)) |
dec63ec3 | 384 | return -EPERM; |
8378b924 DT |
385 | |
386 | if (copy_from_user(&val, argp, sizeof(int))) | |
dec63ec3 | 387 | return -EFAULT; |
8378b924 DT |
388 | |
389 | if (copy_from_user(&speed, argp + 1, sizeof(int))) | |
dec63ec3 | 390 | return -EFAULT; |
8378b924 | 391 | |
dec63ec3 DT |
392 | val = i8k_set_fan(val, speed); |
393 | break; | |
1da177e4 | 394 | |
dec63ec3 DT |
395 | default: |
396 | return -EINVAL; | |
1da177e4 | 397 | } |
1da177e4 | 398 | |
8378b924 | 399 | if (val < 0) |
dec63ec3 | 400 | return val; |
1da177e4 | 401 | |
dec63ec3 DT |
402 | switch (cmd) { |
403 | case I8K_BIOS_VERSION: | |
8378b924 | 404 | if (copy_to_user(argp, &val, 4)) |
dec63ec3 | 405 | return -EFAULT; |
8378b924 | 406 | |
dec63ec3 DT |
407 | break; |
408 | case I8K_MACHINE_ID: | |
8378b924 | 409 | if (copy_to_user(argp, buff, 16)) |
dec63ec3 | 410 | return -EFAULT; |
8378b924 | 411 | |
dec63ec3 DT |
412 | break; |
413 | default: | |
8378b924 | 414 | if (copy_to_user(argp, &val, sizeof(int))) |
dec63ec3 | 415 | return -EFAULT; |
8378b924 | 416 | |
dec63ec3 | 417 | break; |
1da177e4 | 418 | } |
1da177e4 | 419 | |
dec63ec3 | 420 | return 0; |
1da177e4 LT |
421 | } |
422 | ||
d79b6f4d FW |
423 | static long i8k_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) |
424 | { | |
425 | long ret; | |
426 | ||
613655fa | 427 | mutex_lock(&i8k_mutex); |
d79b6f4d | 428 | ret = i8k_ioctl_unlocked(fp, cmd, arg); |
613655fa | 429 | mutex_unlock(&i8k_mutex); |
d79b6f4d FW |
430 | |
431 | return ret; | |
432 | } | |
433 | ||
1da177e4 LT |
434 | /* |
435 | * Print the information for /proc/i8k. | |
436 | */ | |
352f8f8b | 437 | static int i8k_proc_show(struct seq_file *seq, void *offset) |
1da177e4 | 438 | { |
352f8f8b | 439 | int fn_key, cpu_temp, ac_power; |
dec63ec3 DT |
440 | int left_fan, right_fan, left_speed, right_speed; |
441 | ||
96de0e25 JE |
442 | cpu_temp = i8k_get_temp(0); /* 11100 µs */ |
443 | left_fan = i8k_get_fan_status(I8K_FAN_LEFT); /* 580 µs */ | |
444 | right_fan = i8k_get_fan_status(I8K_FAN_RIGHT); /* 580 µs */ | |
445 | left_speed = i8k_get_fan_speed(I8K_FAN_LEFT); /* 580 µs */ | |
446 | right_speed = i8k_get_fan_speed(I8K_FAN_RIGHT); /* 580 µs */ | |
447 | fn_key = i8k_get_fn_status(); /* 750 µs */ | |
8378b924 | 448 | if (power_status) |
96de0e25 | 449 | ac_power = i8k_get_power_status(); /* 14700 µs */ |
8378b924 | 450 | else |
dec63ec3 | 451 | ac_power = -1; |
dec63ec3 DT |
452 | |
453 | /* | |
454 | * Info: | |
455 | * | |
456 | * 1) Format version (this will change if format changes) | |
457 | * 2) BIOS version | |
458 | * 3) BIOS machine ID | |
459 | * 4) Cpu temperature | |
460 | * 5) Left fan status | |
461 | * 6) Right fan status | |
462 | * 7) Left fan speed | |
463 | * 8) Right fan speed | |
464 | * 9) AC power | |
465 | * 10) Fn Key status | |
466 | */ | |
352f8f8b DT |
467 | return seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n", |
468 | I8K_PROC_FMT, | |
469 | bios_version, | |
4f005551 | 470 | i8k_get_dmi_data(DMI_PRODUCT_SERIAL), |
352f8f8b DT |
471 | cpu_temp, |
472 | left_fan, right_fan, left_speed, right_speed, | |
473 | ac_power, fn_key); | |
1da177e4 LT |
474 | } |
475 | ||
352f8f8b | 476 | static int i8k_open_fs(struct inode *inode, struct file *file) |
1da177e4 | 477 | { |
352f8f8b | 478 | return single_open(file, i8k_proc_show, NULL); |
1da177e4 LT |
479 | } |
480 | ||
949a9d70 JD |
481 | |
482 | /* | |
483 | * Hwmon interface | |
484 | */ | |
485 | ||
486 | static ssize_t i8k_hwmon_show_temp(struct device *dev, | |
487 | struct device_attribute *devattr, | |
488 | char *buf) | |
489 | { | |
d83c39de GR |
490 | int index = to_sensor_dev_attr(devattr)->index; |
491 | int temp; | |
949a9d70 | 492 | |
d83c39de GR |
493 | temp = i8k_get_temp(index); |
494 | if (temp < 0) | |
495 | return temp; | |
496 | return sprintf(buf, "%d\n", temp * 1000); | |
949a9d70 JD |
497 | } |
498 | ||
499 | static ssize_t i8k_hwmon_show_fan(struct device *dev, | |
500 | struct device_attribute *devattr, | |
501 | char *buf) | |
502 | { | |
503 | int index = to_sensor_dev_attr(devattr)->index; | |
504 | int fan_speed; | |
505 | ||
506 | fan_speed = i8k_get_fan_speed(index); | |
507 | if (fan_speed < 0) | |
508 | return fan_speed; | |
509 | return sprintf(buf, "%d\n", fan_speed); | |
510 | } | |
511 | ||
e7f5f275 GR |
512 | static ssize_t i8k_hwmon_show_pwm(struct device *dev, |
513 | struct device_attribute *devattr, | |
514 | char *buf) | |
515 | { | |
516 | int index = to_sensor_dev_attr(devattr)->index; | |
517 | int status; | |
518 | ||
519 | status = i8k_get_fan_status(index); | |
520 | if (status < 0) | |
521 | return -EIO; | |
522 | return sprintf(buf, "%d\n", clamp_val(status * 128, 0, 255)); | |
523 | } | |
524 | ||
525 | static ssize_t i8k_hwmon_set_pwm(struct device *dev, | |
526 | struct device_attribute *attr, | |
527 | const char *buf, size_t count) | |
528 | { | |
529 | int index = to_sensor_dev_attr(attr)->index; | |
530 | unsigned long val; | |
531 | int err; | |
532 | ||
533 | err = kstrtoul(buf, 10, &val); | |
534 | if (err) | |
535 | return err; | |
536 | val = clamp_val(DIV_ROUND_CLOSEST(val, 128), 0, 2); | |
537 | ||
538 | mutex_lock(&i8k_mutex); | |
539 | err = i8k_set_fan(index, val); | |
540 | mutex_unlock(&i8k_mutex); | |
541 | ||
542 | return err < 0 ? -EIO : count; | |
543 | } | |
544 | ||
949a9d70 JD |
545 | static ssize_t i8k_hwmon_show_label(struct device *dev, |
546 | struct device_attribute *devattr, | |
547 | char *buf) | |
548 | { | |
82ba1d3f | 549 | static const char *labels[3] = { |
949a9d70 JD |
550 | "CPU", |
551 | "Left Fan", | |
552 | "Right Fan", | |
553 | }; | |
554 | int index = to_sensor_dev_attr(devattr)->index; | |
555 | ||
556 | return sprintf(buf, "%s\n", labels[index]); | |
557 | } | |
558 | ||
d83c39de GR |
559 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0); |
560 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1); | |
561 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2); | |
562 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 3); | |
949a9d70 JD |
563 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
564 | I8K_FAN_LEFT); | |
e7f5f275 GR |
565 | static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
566 | i8k_hwmon_set_pwm, I8K_FAN_LEFT); | |
949a9d70 JD |
567 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL, |
568 | I8K_FAN_RIGHT); | |
e7f5f275 GR |
569 | static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm, |
570 | i8k_hwmon_set_pwm, I8K_FAN_RIGHT); | |
82ba1d3f GR |
571 | static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 0); |
572 | static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 1); | |
573 | static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_label, NULL, 2); | |
574 | ||
575 | static struct attribute *i8k_attrs[] = { | |
d83c39de | 576 | &sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */ |
82ba1d3f | 577 | &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */ |
d83c39de GR |
578 | &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */ |
579 | &sensor_dev_attr_temp3_input.dev_attr.attr, /* 3 */ | |
580 | &sensor_dev_attr_temp4_input.dev_attr.attr, /* 4 */ | |
581 | &sensor_dev_attr_fan1_input.dev_attr.attr, /* 5 */ | |
e7f5f275 GR |
582 | &sensor_dev_attr_pwm1.dev_attr.attr, /* 6 */ |
583 | &sensor_dev_attr_fan1_label.dev_attr.attr, /* 7 */ | |
584 | &sensor_dev_attr_fan2_input.dev_attr.attr, /* 8 */ | |
585 | &sensor_dev_attr_pwm2.dev_attr.attr, /* 9 */ | |
586 | &sensor_dev_attr_fan2_label.dev_attr.attr, /* 10 */ | |
82ba1d3f GR |
587 | NULL |
588 | }; | |
949a9d70 | 589 | |
82ba1d3f GR |
590 | static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, |
591 | int index) | |
949a9d70 | 592 | { |
82ba1d3f GR |
593 | if ((index == 0 || index == 1) && |
594 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1)) | |
595 | return 0; | |
d83c39de GR |
596 | if (index == 2 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2)) |
597 | return 0; | |
598 | if (index == 3 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3)) | |
599 | return 0; | |
600 | if (index == 4 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4)) | |
601 | return 0; | |
e7f5f275 | 602 | if (index >= 5 && index <= 7 && |
82ba1d3f GR |
603 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1)) |
604 | return 0; | |
e7f5f275 | 605 | if (index >= 8 && index <= 10 && |
82ba1d3f GR |
606 | !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2)) |
607 | return 0; | |
608 | ||
609 | return attr->mode; | |
949a9d70 JD |
610 | } |
611 | ||
82ba1d3f GR |
612 | static const struct attribute_group i8k_group = { |
613 | .attrs = i8k_attrs, | |
614 | .is_visible = i8k_is_visible, | |
615 | }; | |
616 | __ATTRIBUTE_GROUPS(i8k); | |
617 | ||
949a9d70 JD |
618 | static int __init i8k_init_hwmon(void) |
619 | { | |
620 | int err; | |
621 | ||
82ba1d3f | 622 | i8k_hwmon_flags = 0; |
949a9d70 JD |
623 | |
624 | /* CPU temperature attributes, if temperature reading is OK */ | |
625 | err = i8k_get_temp(0); | |
82ba1d3f GR |
626 | if (err >= 0) |
627 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1; | |
d83c39de GR |
628 | /* check for additional temperature sensors */ |
629 | err = i8k_get_temp(1); | |
630 | if (err >= 0) | |
631 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2; | |
632 | err = i8k_get_temp(2); | |
633 | if (err >= 0) | |
634 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3; | |
635 | err = i8k_get_temp(3); | |
636 | if (err >= 0) | |
637 | i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4; | |
949a9d70 JD |
638 | |
639 | /* Left fan attributes, if left fan is present */ | |
640 | err = i8k_get_fan_status(I8K_FAN_LEFT); | |
82ba1d3f GR |
641 | if (err >= 0) |
642 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN1; | |
949a9d70 JD |
643 | |
644 | /* Right fan attributes, if right fan is present */ | |
645 | err = i8k_get_fan_status(I8K_FAN_RIGHT); | |
82ba1d3f GR |
646 | if (err >= 0) |
647 | i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2; | |
949a9d70 | 648 | |
82ba1d3f GR |
649 | i8k_hwmon_dev = hwmon_device_register_with_groups(NULL, "i8k", NULL, |
650 | i8k_groups); | |
651 | if (IS_ERR(i8k_hwmon_dev)) { | |
652 | err = PTR_ERR(i8k_hwmon_dev); | |
653 | i8k_hwmon_dev = NULL; | |
654 | pr_err("hwmon registration failed (%d)\n", err); | |
655 | return err; | |
656 | } | |
949a9d70 | 657 | return 0; |
949a9d70 JD |
658 | } |
659 | ||
12186f51 | 660 | static struct dmi_system_id i8k_dmi_table[] __initdata = { |
e70c9d5e DT |
661 | { |
662 | .ident = "Dell Inspiron", | |
663 | .matches = { | |
664 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
665 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
666 | }, | |
667 | }, | |
668 | { | |
669 | .ident = "Dell Latitude", | |
670 | .matches = { | |
671 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"), | |
672 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
673 | }, | |
674 | }, | |
7e0fa31d DT |
675 | { |
676 | .ident = "Dell Inspiron 2", | |
677 | .matches = { | |
678 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
679 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"), | |
680 | }, | |
681 | }, | |
682 | { | |
683 | .ident = "Dell Latitude 2", | |
684 | .matches = { | |
685 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
686 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"), | |
687 | }, | |
688 | }, | |
a9000d03 NW |
689 | { /* UK Inspiron 6400 */ |
690 | .ident = "Dell Inspiron 3", | |
691 | .matches = { | |
692 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
693 | DMI_MATCH(DMI_PRODUCT_NAME, "MM061"), | |
694 | }, | |
695 | }, | |
48103c52 FS |
696 | { |
697 | .ident = "Dell Inspiron 3", | |
698 | .matches = { | |
699 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
700 | DMI_MATCH(DMI_PRODUCT_NAME, "MP061"), | |
701 | }, | |
702 | }, | |
7ab21a86 AS |
703 | { |
704 | .ident = "Dell Precision", | |
705 | .matches = { | |
706 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
707 | DMI_MATCH(DMI_PRODUCT_NAME, "Precision"), | |
708 | }, | |
709 | }, | |
bef2a508 FH |
710 | { |
711 | .ident = "Dell Vostro", | |
712 | .matches = { | |
713 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
714 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro"), | |
715 | }, | |
716 | }, | |
9aa5b018 AC |
717 | { |
718 | .ident = "Dell XPS421", | |
719 | .matches = { | |
720 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
721 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"), | |
722 | }, | |
723 | }, | |
ff457bde GR |
724 | { |
725 | .ident = "Dell Studio", | |
726 | .matches = { | |
727 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
728 | DMI_MATCH(DMI_PRODUCT_NAME, "Studio"), | |
729 | }, | |
26d09382 | 730 | .driver_data = (void *)1, /* fan multiplier override */ |
ff457bde | 731 | }, |
919a0304 GR |
732 | { |
733 | .ident = "Dell XPS M140", | |
734 | .matches = { | |
735 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
736 | DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"), | |
737 | }, | |
26d09382 | 738 | .driver_data = (void *)1, /* fan multiplier override */ |
919a0304 | 739 | }, |
12186f51 | 740 | { } |
e70c9d5e | 741 | }; |
1da177e4 LT |
742 | |
743 | /* | |
744 | * Probe for the presence of a supported laptop. | |
745 | */ | |
746 | static int __init i8k_probe(void) | |
747 | { | |
26d09382 | 748 | const struct dmi_system_id *id; |
dec63ec3 | 749 | |
1da177e4 | 750 | /* |
dec63ec3 | 751 | * Get DMI information |
1da177e4 | 752 | */ |
e70c9d5e DT |
753 | if (!dmi_check_system(i8k_dmi_table)) { |
754 | if (!ignore_dmi && !force) | |
755 | return -ENODEV; | |
756 | ||
60e71aaf GR |
757 | pr_info("not running on a supported Dell system.\n"); |
758 | pr_info("vendor=%s, model=%s, version=%s\n", | |
e70c9d5e DT |
759 | i8k_get_dmi_data(DMI_SYS_VENDOR), |
760 | i8k_get_dmi_data(DMI_PRODUCT_NAME), | |
761 | i8k_get_dmi_data(DMI_BIOS_VERSION)); | |
1da177e4 | 762 | } |
dec63ec3 | 763 | |
12186f51 GR |
764 | strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), |
765 | sizeof(bios_version)); | |
e70c9d5e | 766 | |
1da177e4 | 767 | /* |
dec63ec3 | 768 | * Get SMM Dell signature |
1da177e4 | 769 | */ |
7e0fa31d DT |
770 | if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) && |
771 | i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) { | |
60e71aaf | 772 | pr_err("unable to get SMM Dell signature\n"); |
e70c9d5e DT |
773 | if (!force) |
774 | return -ENODEV; | |
1da177e4 | 775 | } |
1da177e4 | 776 | |
26d09382 GR |
777 | i8k_fan_mult = fan_mult; |
778 | id = dmi_first_match(i8k_dmi_table); | |
779 | if (id && fan_mult == I8K_FAN_MULT && id->driver_data) | |
780 | i8k_fan_mult = (unsigned long)id->driver_data; | |
781 | ||
dec63ec3 | 782 | return 0; |
1da177e4 LT |
783 | } |
784 | ||
8378b924 | 785 | static int __init i8k_init(void) |
1da177e4 | 786 | { |
dec63ec3 | 787 | struct proc_dir_entry *proc_i8k; |
949a9d70 | 788 | int err; |
dec63ec3 DT |
789 | |
790 | /* Are we running on an supported laptop? */ | |
e70c9d5e | 791 | if (i8k_probe()) |
dec63ec3 | 792 | return -ENODEV; |
dec63ec3 DT |
793 | |
794 | /* Register the proc entry */ | |
1b502217 | 795 | proc_i8k = proc_create("i8k", 0, NULL, &i8k_fops); |
352f8f8b | 796 | if (!proc_i8k) |
dec63ec3 | 797 | return -ENOENT; |
352f8f8b | 798 | |
949a9d70 JD |
799 | err = i8k_init_hwmon(); |
800 | if (err) | |
801 | goto exit_remove_proc; | |
802 | ||
dec63ec3 | 803 | return 0; |
949a9d70 JD |
804 | |
805 | exit_remove_proc: | |
806 | remove_proc_entry("i8k", NULL); | |
807 | return err; | |
1da177e4 LT |
808 | } |
809 | ||
8378b924 | 810 | static void __exit i8k_exit(void) |
1da177e4 | 811 | { |
82ba1d3f | 812 | hwmon_device_unregister(i8k_hwmon_dev); |
dec63ec3 | 813 | remove_proc_entry("i8k", NULL); |
1da177e4 | 814 | } |
1da177e4 | 815 | |
8378b924 DT |
816 | module_init(i8k_init); |
817 | module_exit(i8k_exit); |