blob: 9226838c867f75a59c43b20ac4a94a74ec393786 [file] [log] [blame]
Peter Feuerere86435e2009-06-21 18:53:03 +02001/*
2 * acerhdf - A driver which monitors the temperature
3 * of the aspire one netbook, turns on/off the fan
4 * as soon as the upper/lower threshold is reached.
5 *
6 * (C) 2009 - Peter Feuerer peter (a) piie.net
7 * http://piie.net
8 * 2009 Borislav Petkov <petkovbb@gmail.com>
9 *
10 * Inspired by and many thanks to:
11 * o acerfand - Rachel Greenham
12 * o acer_ec.pl - Michael Kurz michi.kurz (at) googlemail.com
13 * - Petr Tomasek tomasek (#) etf,cuni,cz
14 * - Carlos Corbacho cathectic (at) gmail.com
15 * o lkml - Matthew Garrett
16 * - Borislav Petkov
17 * - Andreas Mohr
18 *
19 * This program is free software; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation; either version 2 of the License, or
22 * (at your option) any later version.
23 *
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 */
33
34#define pr_fmt(fmt) "acerhdf: " fmt
35
36#include <linux/kernel.h>
37#include <linux/module.h>
38#include <linux/fs.h>
39#include <linux/dmi.h>
40#include <acpi/acpi_drivers.h>
41#include <linux/sched.h>
42#include <linux/thermal.h>
43#include <linux/platform_device.h>
44
45/*
46 * The driver is started with "kernel mode off" by default. That means, the BIOS
47 * is still in control of the fan. In this mode the driver allows to read the
48 * temperature of the cpu and a userspace tool may take over control of the fan.
49 * If the driver is switched to "kernel mode" (e.g. via module parameter) the
50 * driver is in full control of the fan. If you want the module to be started in
51 * kernel mode by default, define the following:
52 */
53#undef START_IN_KERNEL_MODE
54
Peter Feuerer887b7ca2010-07-20 15:19:30 -070055#define DRV_VER "0.5.23"
Peter Feuerere86435e2009-06-21 18:53:03 +020056
57/*
58 * According to the Atom N270 datasheet,
59 * (http://download.intel.com/design/processor/datashts/320032.pdf) the
60 * CPU's optimal operating limits denoted in junction temperature as
61 * measured by the on-die thermal monitor are within 0 <= Tj <= 90. So,
62 * assume 89°C is critical temperature.
63 */
Peter Feuerer70052912009-11-17 14:07:21 -080064#define ACERHDF_TEMP_CRIT 89000
Peter Feuerere86435e2009-06-21 18:53:03 +020065#define ACERHDF_FAN_OFF 0
66#define ACERHDF_FAN_AUTO 1
67
68/*
69 * No matter what value the user puts into the fanon variable, turn on the fan
70 * at 80 degree Celsius to prevent hardware damage
71 */
Peter Feuerer70052912009-11-17 14:07:21 -080072#define ACERHDF_MAX_FANON 80000
Peter Feuerere86435e2009-06-21 18:53:03 +020073
74/*
75 * Maximum interval between two temperature checks is 15 seconds, as the die
76 * can get hot really fast under heavy load (plus we shouldn't forget about
77 * possible impact of _external_ aggressive sources such as heaters, sun etc.)
78 */
79#define ACERHDF_MAX_INTERVAL 15
80
81#ifdef START_IN_KERNEL_MODE
82static int kernelmode = 1;
83#else
84static int kernelmode;
85#endif
86
87static unsigned int interval = 10;
Peter Feuerer70052912009-11-17 14:07:21 -080088static unsigned int fanon = 63000;
89static unsigned int fanoff = 58000;
Peter Feuerere86435e2009-06-21 18:53:03 +020090static unsigned int verbose;
91static unsigned int fanstate = ACERHDF_FAN_AUTO;
92static char force_bios[16];
Peter Feuererded0cdf2009-08-06 15:57:52 -070093static char force_product[16];
Peter Feuerere86435e2009-06-21 18:53:03 +020094static unsigned int prev_interval;
95struct thermal_zone_device *thz_dev;
96struct thermal_cooling_device *cl_dev;
97struct platform_device *acerhdf_dev;
98
99module_param(kernelmode, uint, 0);
100MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off");
101module_param(interval, uint, 0600);
102MODULE_PARM_DESC(interval, "Polling interval of temperature check");
103module_param(fanon, uint, 0600);
104MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature");
105module_param(fanoff, uint, 0600);
106MODULE_PARM_DESC(fanoff, "Turn the fan off below this temperature");
107module_param(verbose, uint, 0600);
108MODULE_PARM_DESC(verbose, "Enable verbose dmesg output");
109module_param_string(force_bios, force_bios, 16, 0);
110MODULE_PARM_DESC(force_bios, "Force BIOS version and omit BIOS check");
Peter Feuererded0cdf2009-08-06 15:57:52 -0700111module_param_string(force_product, force_product, 16, 0);
112MODULE_PARM_DESC(force_product, "Force BIOS product and omit BIOS check");
113
114/*
Peter Feuerer210183d2010-07-20 15:19:32 -0700115 * cmd_off: to switch the fan completely off and check if the fan is off
Peter Feuererded0cdf2009-08-06 15:57:52 -0700116 * cmd_auto: to set the BIOS in control of the fan. The BIOS regulates then
117 * the fan speed depending on the temperature
118 */
119struct fancmd {
120 u8 cmd_off;
121 u8 cmd_auto;
122};
Peter Feuerere86435e2009-06-21 18:53:03 +0200123
124/* BIOS settings */
125struct bios_settings_t {
126 const char *vendor;
Peter Feuererded0cdf2009-08-06 15:57:52 -0700127 const char *product;
Peter Feuerere86435e2009-06-21 18:53:03 +0200128 const char *version;
129 unsigned char fanreg;
130 unsigned char tempreg;
Peter Feuererded0cdf2009-08-06 15:57:52 -0700131 struct fancmd cmd;
Peter Feuerere86435e2009-06-21 18:53:03 +0200132};
133
134/* Register addresses and values for different BIOS versions */
135static const struct bios_settings_t bios_tbl[] = {
Peter Feuererded0cdf2009-08-06 15:57:52 -0700136 /* AOA110 */
Peter Feuerer210183d2010-07-20 15:19:32 -0700137 {"Acer", "AOA110", "v0.3109", 0x55, 0x58, {0x1f, 0x00} },
138 {"Acer", "AOA110", "v0.3114", 0x55, 0x58, {0x1f, 0x00} },
139 {"Acer", "AOA110", "v0.3301", 0x55, 0x58, {0xaf, 0x00} },
140 {"Acer", "AOA110", "v0.3304", 0x55, 0x58, {0xaf, 0x00} },
141 {"Acer", "AOA110", "v0.3305", 0x55, 0x58, {0xaf, 0x00} },
142 {"Acer", "AOA110", "v0.3307", 0x55, 0x58, {0xaf, 0x00} },
143 {"Acer", "AOA110", "v0.3308", 0x55, 0x58, {0x21, 0x00} },
144 {"Acer", "AOA110", "v0.3309", 0x55, 0x58, {0x21, 0x00} },
145 {"Acer", "AOA110", "v0.3310", 0x55, 0x58, {0x21, 0x00} },
Peter Feuererded0cdf2009-08-06 15:57:52 -0700146 /* AOA150 */
Peter Feuerer210183d2010-07-20 15:19:32 -0700147 {"Acer", "AOA150", "v0.3114", 0x55, 0x58, {0x1f, 0x00} },
148 {"Acer", "AOA150", "v0.3301", 0x55, 0x58, {0x20, 0x00} },
149 {"Acer", "AOA150", "v0.3304", 0x55, 0x58, {0x20, 0x00} },
150 {"Acer", "AOA150", "v0.3305", 0x55, 0x58, {0x20, 0x00} },
151 {"Acer", "AOA150", "v0.3307", 0x55, 0x58, {0x20, 0x00} },
152 {"Acer", "AOA150", "v0.3308", 0x55, 0x58, {0x20, 0x00} },
153 {"Acer", "AOA150", "v0.3309", 0x55, 0x58, {0x20, 0x00} },
154 {"Acer", "AOA150", "v0.3310", 0x55, 0x58, {0x20, 0x00} },
Peter Feuerer36065742009-11-17 14:27:37 -0800155 /* Acer 1410 */
Peter Feuerer210183d2010-07-20 15:19:32 -0700156 {"Acer", "Aspire 1410", "v0.3115", 0x55, 0x58, {0x9e, 0x00} },
157 {"Acer", "Aspire 1410", "v0.3120", 0x55, 0x58, {0x9e, 0x00} },
158 {"Acer", "Aspire 1410", "v1.3303", 0x55, 0x58, {0x9e, 0x00} },
Peter Feuerer94219d72009-12-21 16:20:05 -0800159 /* Acer 1810xx */
Peter Feuerer210183d2010-07-20 15:19:32 -0700160 {"Acer", "Aspire 1810TZ", "v0.3115", 0x55, 0x58, {0x9e, 0x00} },
161 {"Acer", "Aspire 1810T", "v0.3115", 0x55, 0x58, {0x9e, 0x00} },
162 {"Acer", "Aspire 1810TZ", "v0.3119", 0x55, 0x58, {0x9e, 0x00} },
163 {"Acer", "Aspire 1810T", "v0.3119", 0x55, 0x58, {0x9e, 0x00} },
164 {"Acer", "Aspire 1810TZ", "v0.3120", 0x55, 0x58, {0x9e, 0x00} },
165 {"Acer", "Aspire 1810T", "v0.3120", 0x55, 0x58, {0x9e, 0x00} },
166 {"Acer", "Aspire 1810TZ", "v1.3204", 0x55, 0x58, {0x9e, 0x00} },
167 {"Acer", "Aspire 1810T", "v1.3204", 0x55, 0x58, {0x9e, 0x00} },
168 {"Acer", "Aspire 1810TZ", "v1.3303", 0x55, 0x58, {0x9e, 0x00} },
169 {"Acer", "Aspire 1810T", "v1.3303", 0x55, 0x58, {0x9e, 0x00} },
Peter Feuerer94219d72009-12-21 16:20:05 -0800170 /* Gateway */
Peter Feuerer210183d2010-07-20 15:19:32 -0700171 {"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x00} },
172 {"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x00} },
173 {"Gateway", "LT31", "v1.3103", 0x55, 0x58, {0x9e, 0x00} },
174 {"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x9e, 0x00} },
175 {"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x9e, 0x00} },
Peter Feuerer94219d72009-12-21 16:20:05 -0800176 /* Packard Bell */
Peter Feuerer210183d2010-07-20 15:19:32 -0700177 {"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00} },
178 {"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00} },
179 {"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x00} },
180 {"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00} },
181 {"Packard Bell", "DOTMU", "v1.3303", 0x55, 0x58, {0x9e, 0x00} },
182 {"Packard Bell", "DOTMU", "v0.3120", 0x55, 0x58, {0x9e, 0x00} },
183 {"Packard Bell", "DOTMA", "v1.3201", 0x55, 0x58, {0x9e, 0x00} },
Peter Feuererded0cdf2009-08-06 15:57:52 -0700184 /* pewpew-terminator */
Peter Feuerer210183d2010-07-20 15:19:32 -0700185 {"", "", "", 0, 0, {0, 0} }
Peter Feuerere86435e2009-06-21 18:53:03 +0200186};
187
188static const struct bios_settings_t *bios_cfg __read_mostly;
189
Peter Feuerere86435e2009-06-21 18:53:03 +0200190static int acerhdf_get_temp(int *temp)
191{
192 u8 read_temp;
193
194 if (ec_read(bios_cfg->tempreg, &read_temp))
195 return -EINVAL;
196
Peter Feuerer70052912009-11-17 14:07:21 -0800197 *temp = read_temp * 1000;
Peter Feuerere86435e2009-06-21 18:53:03 +0200198
199 return 0;
200}
201
202static int acerhdf_get_fanstate(int *state)
203{
204 u8 fan;
Peter Feuerere86435e2009-06-21 18:53:03 +0200205
206 if (ec_read(bios_cfg->fanreg, &fan))
207 return -EINVAL;
208
Peter Feuerer210183d2010-07-20 15:19:32 -0700209 if (fan != bios_cfg->cmd.cmd_off)
Peter Feuererded0cdf2009-08-06 15:57:52 -0700210 *state = ACERHDF_FAN_AUTO;
211 else
212 *state = ACERHDF_FAN_OFF;
Peter Feuerere86435e2009-06-21 18:53:03 +0200213
214 return 0;
215}
216
217static void acerhdf_change_fanstate(int state)
218{
219 unsigned char cmd;
220
221 if (verbose)
222 pr_notice("fan %s\n", (state == ACERHDF_FAN_OFF) ?
223 "OFF" : "ON");
224
225 if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) {
226 pr_err("invalid fan state %d requested, setting to auto!\n",
227 state);
228 state = ACERHDF_FAN_AUTO;
229 }
230
Peter Feuererded0cdf2009-08-06 15:57:52 -0700231 cmd = (state == ACERHDF_FAN_OFF) ? bios_cfg->cmd.cmd_off
232 : bios_cfg->cmd.cmd_auto;
Peter Feuerere86435e2009-06-21 18:53:03 +0200233 fanstate = state;
234
235 ec_write(bios_cfg->fanreg, cmd);
236}
237
238static void acerhdf_check_param(struct thermal_zone_device *thermal)
239{
240 if (fanon > ACERHDF_MAX_FANON) {
241 pr_err("fanon temperature too high, set to %d\n",
242 ACERHDF_MAX_FANON);
243 fanon = ACERHDF_MAX_FANON;
244 }
245
246 if (kernelmode && prev_interval != interval) {
247 if (interval > ACERHDF_MAX_INTERVAL) {
248 pr_err("interval too high, set to %d\n",
249 ACERHDF_MAX_INTERVAL);
250 interval = ACERHDF_MAX_INTERVAL;
251 }
252 if (verbose)
253 pr_notice("interval changed to: %d\n",
254 interval);
255 thermal->polling_delay = interval*1000;
256 prev_interval = interval;
257 }
258}
259
260/*
261 * This is the thermal zone callback which does the delayed polling of the fan
262 * state. We do check /sysfs-originating settings here in acerhdf_check_param()
263 * as late as the polling interval is since we can't do that in the respective
264 * accessors of the module parameters.
265 */
266static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal,
267 unsigned long *t)
268{
269 int temp, err = 0;
270
271 acerhdf_check_param(thermal);
272
273 err = acerhdf_get_temp(&temp);
274 if (err)
275 return err;
276
277 if (verbose)
278 pr_notice("temp %d\n", temp);
279
280 *t = temp;
281 return 0;
282}
283
284static int acerhdf_bind(struct thermal_zone_device *thermal,
285 struct thermal_cooling_device *cdev)
286{
287 /* if the cooling device is the one from acerhdf bind it */
288 if (cdev != cl_dev)
289 return 0;
290
291 if (thermal_zone_bind_cooling_device(thermal, 0, cdev)) {
292 pr_err("error binding cooling dev\n");
293 return -EINVAL;
294 }
295 return 0;
296}
297
298static int acerhdf_unbind(struct thermal_zone_device *thermal,
299 struct thermal_cooling_device *cdev)
300{
301 if (cdev != cl_dev)
302 return 0;
303
304 if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) {
305 pr_err("error unbinding cooling dev\n");
306 return -EINVAL;
307 }
308 return 0;
309}
310
311static inline void acerhdf_revert_to_bios_mode(void)
312{
313 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
314 kernelmode = 0;
315 if (thz_dev)
316 thz_dev->polling_delay = 0;
317 pr_notice("kernel mode fan control OFF\n");
318}
319static inline void acerhdf_enable_kernelmode(void)
320{
321 kernelmode = 1;
322
323 thz_dev->polling_delay = interval*1000;
324 thermal_zone_device_update(thz_dev);
325 pr_notice("kernel mode fan control ON\n");
326}
327
328static int acerhdf_get_mode(struct thermal_zone_device *thermal,
329 enum thermal_device_mode *mode)
330{
331 if (verbose)
332 pr_notice("kernel mode fan control %d\n", kernelmode);
333
334 *mode = (kernelmode) ? THERMAL_DEVICE_ENABLED
335 : THERMAL_DEVICE_DISABLED;
336
337 return 0;
338}
339
340/*
341 * set operation mode;
342 * enabled: the thermal layer of the kernel takes care about
343 * the temperature and the fan.
344 * disabled: the BIOS takes control of the fan.
345 */
346static int acerhdf_set_mode(struct thermal_zone_device *thermal,
347 enum thermal_device_mode mode)
348{
349 if (mode == THERMAL_DEVICE_DISABLED && kernelmode)
350 acerhdf_revert_to_bios_mode();
351 else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode)
352 acerhdf_enable_kernelmode();
353
354 return 0;
355}
356
357static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip,
358 enum thermal_trip_type *type)
359{
360 if (trip == 0)
361 *type = THERMAL_TRIP_ACTIVE;
362
363 return 0;
364}
365
366static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip,
367 unsigned long *temp)
368{
369 if (trip == 0)
370 *temp = fanon;
371
372 return 0;
373}
374
375static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal,
376 unsigned long *temperature)
377{
378 *temperature = ACERHDF_TEMP_CRIT;
379 return 0;
380}
381
382/* bind callback functions to thermalzone */
383struct thermal_zone_device_ops acerhdf_dev_ops = {
384 .bind = acerhdf_bind,
385 .unbind = acerhdf_unbind,
386 .get_temp = acerhdf_get_ec_temp,
387 .get_mode = acerhdf_get_mode,
388 .set_mode = acerhdf_set_mode,
389 .get_trip_type = acerhdf_get_trip_type,
390 .get_trip_temp = acerhdf_get_trip_temp,
391 .get_crit_temp = acerhdf_get_crit_temp,
392};
393
394
395/*
396 * cooling device callback functions
397 * get maximal fan cooling state
398 */
399static int acerhdf_get_max_state(struct thermal_cooling_device *cdev,
400 unsigned long *state)
401{
402 *state = 1;
403
404 return 0;
405}
406
407static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev,
408 unsigned long *state)
409{
410 int err = 0, tmp;
411
412 err = acerhdf_get_fanstate(&tmp);
413 if (err)
414 return err;
415
416 *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0;
417 return 0;
418}
419
420/* change current fan state - is overwritten when running in kernel mode */
421static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev,
422 unsigned long state)
423{
424 int cur_temp, cur_state, err = 0;
425
426 if (!kernelmode)
427 return 0;
428
429 err = acerhdf_get_temp(&cur_temp);
430 if (err) {
431 pr_err("error reading temperature, hand off control to BIOS\n");
432 goto err_out;
433 }
434
435 err = acerhdf_get_fanstate(&cur_state);
436 if (err) {
437 pr_err("error reading fan state, hand off control to BIOS\n");
438 goto err_out;
439 }
440
441 if (state == 0) {
442 /* turn fan off only if below fanoff temperature */
443 if ((cur_state == ACERHDF_FAN_AUTO) &&
444 (cur_temp < fanoff))
445 acerhdf_change_fanstate(ACERHDF_FAN_OFF);
446 } else {
447 if (cur_state == ACERHDF_FAN_OFF)
448 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
449 }
450 return 0;
451
452err_out:
453 acerhdf_revert_to_bios_mode();
454 return -EINVAL;
455}
456
457/* bind fan callbacks to fan device */
458struct thermal_cooling_device_ops acerhdf_cooling_ops = {
459 .get_max_state = acerhdf_get_max_state,
460 .get_cur_state = acerhdf_get_cur_state,
461 .set_cur_state = acerhdf_set_cur_state,
462};
463
464/* suspend / resume functionality */
Borislav Petkovff27e1f2009-09-18 12:41:05 -0700465static int acerhdf_suspend(struct device *dev)
Peter Feuerere86435e2009-06-21 18:53:03 +0200466{
467 if (kernelmode)
468 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
469
470 if (verbose)
471 pr_notice("going suspend\n");
472
473 return 0;
474}
475
Peter Feuerere86435e2009-06-21 18:53:03 +0200476static int __devinit acerhdf_probe(struct platform_device *device)
477{
478 return 0;
479}
480
481static int acerhdf_remove(struct platform_device *device)
482{
483 return 0;
484}
485
Alexey Dobriyan47145212009-12-14 18:00:08 -0800486static const struct dev_pm_ops acerhdf_pm_ops = {
Borislav Petkovff27e1f2009-09-18 12:41:05 -0700487 .suspend = acerhdf_suspend,
488 .freeze = acerhdf_suspend,
489};
490
Peter Feuererded0cdf2009-08-06 15:57:52 -0700491static struct platform_driver acerhdf_driver = {
Peter Feuerere86435e2009-06-21 18:53:03 +0200492 .driver = {
Borislav Petkovff27e1f2009-09-18 12:41:05 -0700493 .name = "acerhdf",
Peter Feuerere86435e2009-06-21 18:53:03 +0200494 .owner = THIS_MODULE,
Borislav Petkovff27e1f2009-09-18 12:41:05 -0700495 .pm = &acerhdf_pm_ops,
Peter Feuerere86435e2009-06-21 18:53:03 +0200496 },
497 .probe = acerhdf_probe,
498 .remove = acerhdf_remove,
Peter Feuerere86435e2009-06-21 18:53:03 +0200499};
500
Peter Feuererdcbfb812009-12-21 16:20:06 -0800501/* checks if str begins with start */
502static int str_starts_with(const char *str, const char *start)
503{
504 unsigned long str_len = 0, start_len = 0;
505
506 str_len = strlen(str);
507 start_len = strlen(start);
508
509 if (str_len >= start_len &&
510 !strncmp(str, start, start_len))
511 return 1;
512
513 return 0;
514}
Peter Feuerere86435e2009-06-21 18:53:03 +0200515
516/* check hardware */
517static int acerhdf_check_hardware(void)
518{
519 char const *vendor, *version, *product;
Peter Feuererdcbfb812009-12-21 16:20:06 -0800520 const struct bios_settings_t *bt = NULL;
Peter Feuerere86435e2009-06-21 18:53:03 +0200521
522 /* get BIOS data */
523 vendor = dmi_get_system_info(DMI_SYS_VENDOR);
524 version = dmi_get_system_info(DMI_BIOS_VERSION);
525 product = dmi_get_system_info(DMI_PRODUCT_NAME);
526
Peter Feuererded0cdf2009-08-06 15:57:52 -0700527
Peter Feuerere86435e2009-06-21 18:53:03 +0200528 pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER);
529
Peter Feuererded0cdf2009-08-06 15:57:52 -0700530 if (force_bios[0]) {
Peter Feuerere86435e2009-06-21 18:53:03 +0200531 version = force_bios;
Peter Feuererded0cdf2009-08-06 15:57:52 -0700532 pr_info("forcing BIOS version: %s\n", version);
Peter Feuerere86435e2009-06-21 18:53:03 +0200533 kernelmode = 0;
534 }
535
Peter Feuererded0cdf2009-08-06 15:57:52 -0700536 if (force_product[0]) {
537 product = force_product;
538 pr_info("forcing BIOS product: %s\n", product);
539 kernelmode = 0;
540 }
541
Peter Feuerere86435e2009-06-21 18:53:03 +0200542 if (verbose)
543 pr_info("BIOS info: %s %s, product: %s\n",
544 vendor, version, product);
545
546 /* search BIOS version and vendor in BIOS settings table */
Peter Feuererdcbfb812009-12-21 16:20:06 -0800547 for (bt = bios_tbl; bt->vendor[0]; bt++) {
548 /*
549 * check if actual hardware BIOS vendor, product and version
550 * IDs start with the strings of BIOS table entry
551 */
552 if (str_starts_with(vendor, bt->vendor) &&
553 str_starts_with(product, bt->product) &&
554 str_starts_with(version, bt->version)) {
555 bios_cfg = bt;
Peter Feuerere86435e2009-06-21 18:53:03 +0200556 break;
557 }
558 }
559
560 if (!bios_cfg) {
Peter Feuererded0cdf2009-08-06 15:57:52 -0700561 pr_err("unknown (unsupported) BIOS version %s/%s/%s, "
562 "please report, aborting!\n", vendor, product, version);
Peter Feuerere86435e2009-06-21 18:53:03 +0200563 return -EINVAL;
564 }
565
566 /*
567 * if started with kernel mode off, prevent the kernel from switching
568 * off the fan
569 */
570 if (!kernelmode) {
571 pr_notice("Fan control off, to enable do:\n");
572 pr_notice("echo -n \"enabled\" > "
573 "/sys/class/thermal/thermal_zone0/mode\n");
574 }
575
576 return 0;
577}
578
579static int acerhdf_register_platform(void)
580{
581 int err = 0;
582
Peter Feuererded0cdf2009-08-06 15:57:52 -0700583 err = platform_driver_register(&acerhdf_driver);
Peter Feuerere86435e2009-06-21 18:53:03 +0200584 if (err)
585 return err;
586
587 acerhdf_dev = platform_device_alloc("acerhdf", -1);
588 platform_device_add(acerhdf_dev);
589
590 return 0;
591}
592
593static void acerhdf_unregister_platform(void)
594{
595 if (!acerhdf_dev)
596 return;
597
598 platform_device_del(acerhdf_dev);
Peter Feuererded0cdf2009-08-06 15:57:52 -0700599 platform_driver_unregister(&acerhdf_driver);
Peter Feuerere86435e2009-06-21 18:53:03 +0200600}
601
602static int acerhdf_register_thermal(void)
603{
604 cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL,
605 &acerhdf_cooling_ops);
606
607 if (IS_ERR(cl_dev))
608 return -EINVAL;
609
610 thz_dev = thermal_zone_device_register("acerhdf", 1, NULL,
611 &acerhdf_dev_ops, 0, 0, 0,
612 (kernelmode) ? interval*1000 : 0);
613 if (IS_ERR(thz_dev))
614 return -EINVAL;
615
616 return 0;
617}
618
619static void acerhdf_unregister_thermal(void)
620{
621 if (cl_dev) {
622 thermal_cooling_device_unregister(cl_dev);
623 cl_dev = NULL;
624 }
625
626 if (thz_dev) {
627 thermal_zone_device_unregister(thz_dev);
628 thz_dev = NULL;
629 }
630}
631
632static int __init acerhdf_init(void)
633{
634 int err = 0;
635
636 err = acerhdf_check_hardware();
637 if (err)
638 goto out_err;
639
640 err = acerhdf_register_platform();
641 if (err)
642 goto err_unreg;
643
644 err = acerhdf_register_thermal();
645 if (err)
646 goto err_unreg;
647
648 return 0;
649
650err_unreg:
651 acerhdf_unregister_thermal();
652 acerhdf_unregister_platform();
653
654out_err:
655 return -ENODEV;
656}
657
658static void __exit acerhdf_exit(void)
659{
660 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
661 acerhdf_unregister_thermal();
662 acerhdf_unregister_platform();
663}
664
665MODULE_LICENSE("GPL");
666MODULE_AUTHOR("Peter Feuerer");
667MODULE_DESCRIPTION("Aspire One temperature and fan driver");
Stefan Baderbdc731b2009-12-21 16:20:04 -0800668MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:");
Peter Feuerer94219d72009-12-21 16:20:05 -0800669MODULE_ALIAS("dmi:*:*Acer*:pnAspire 1410*:");
670MODULE_ALIAS("dmi:*:*Acer*:pnAspire 1810*:");
Stefan Baderbdc731b2009-12-21 16:20:04 -0800671MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:");
Peter Feuerer94219d72009-12-21 16:20:05 -0800672MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:");
Stefan Baderbdc731b2009-12-21 16:20:04 -0800673MODULE_ALIAS("dmi:*:*Packard Bell*:pnAOA*:");
674MODULE_ALIAS("dmi:*:*Packard Bell*:pnDOA*:");
Peter Feuerer94219d72009-12-21 16:20:05 -0800675MODULE_ALIAS("dmi:*:*Packard Bell*:pnDOTMU*:");
Peter Feuerer887b7ca2010-07-20 15:19:30 -0700676MODULE_ALIAS("dmi:*:*Packard Bell*:pnDOTMA*:");
Peter Feuerere86435e2009-06-21 18:53:03 +0200677
678module_init(acerhdf_init);
679module_exit(acerhdf_exit);