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Thermal: Make Thermal trip points writeable
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / platform / x86 / acerhdf.c
CommitLineData
e86435eb
PF		 1/*
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
4e791c98 8 * 2009 Borislav Petkov bp (a) alien8.de
e86435eb
PF		 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>
e86435eb 38#include <linux/dmi.h>
c4bae98c 39#include <linux/acpi.h>
e86435eb
PF		 40#include <linux/thermal.h>
41#include <linux/platform_device.h>
42
43/*
44 * The driver is started with "kernel mode off" by default. That means, the BIOS
45 * is still in control of the fan. In this mode the driver allows to read the
46 * temperature of the cpu and a userspace tool may take over control of the fan.
47 * If the driver is switched to "kernel mode" (e.g. via module parameter) the
48 * driver is in full control of the fan. If you want the module to be started in
49 * kernel mode by default, define the following:
50 */
51#undef START_IN_KERNEL_MODE
52
43ae1e32 53#define DRV_VER "0.5.26"
e86435eb
PF		 54
55/*
56 * According to the Atom N270 datasheet,
57 * (http://download.intel.com/design/processor/datashts/320032.pdf) the
58 * CPU's optimal operating limits denoted in junction temperature as
59 * measured by the on-die thermal monitor are within 0 <= Tj <= 90. So,
60 * assume 89°C is critical temperature.
61 */
70052917 62#define ACERHDF_TEMP_CRIT 89000
e86435eb
PF		 63#define ACERHDF_FAN_OFF 0
64#define ACERHDF_FAN_AUTO 1
65
66/*
67 * No matter what value the user puts into the fanon variable, turn on the fan
68 * at 80 degree Celsius to prevent hardware damage
69 */
70052917 70#define ACERHDF_MAX_FANON 80000
e86435eb
PF		 71
72/*
73 * Maximum interval between two temperature checks is 15 seconds, as the die
74 * can get hot really fast under heavy load (plus we shouldn't forget about
75 * possible impact of _external_ aggressive sources such as heaters, sun etc.)
76 */
77#define ACERHDF_MAX_INTERVAL 15
78
79#ifdef START_IN_KERNEL_MODE
80static int kernelmode = 1;
81#else
82static int kernelmode;
83#endif
84
85static unsigned int interval = 10;
351963bb
PF		 86static unsigned int fanon = 60000;
87static unsigned int fanoff = 53000;
e86435eb
PF		 88static unsigned int verbose;
89static unsigned int fanstate = ACERHDF_FAN_AUTO;
90static char force_bios[16];
ded0cdfc 91static char force_product[16];
e86435eb 92static unsigned int prev_interval;
fedae5ad
AL		 93static struct thermal_zone_device *thz_dev;
94static struct thermal_cooling_device *cl_dev;
95static struct platform_device *acerhdf_dev;
e86435eb
PF		 96
97module_param(kernelmode, uint, 0);
98MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off");
99module_param(interval, uint, 0600);
100MODULE_PARM_DESC(interval, "Polling interval of temperature check");
101module_param(fanon, uint, 0600);
102MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature");
103module_param(fanoff, uint, 0600);
104MODULE_PARM_DESC(fanoff, "Turn the fan off below this temperature");
105module_param(verbose, uint, 0600);
106MODULE_PARM_DESC(verbose, "Enable verbose dmesg output");
107module_param_string(force_bios, force_bios, 16, 0);
108MODULE_PARM_DESC(force_bios, "Force BIOS version and omit BIOS check");
ded0cdfc
PF		 109module_param_string(force_product, force_product, 16, 0);
110MODULE_PARM_DESC(force_product, "Force BIOS product and omit BIOS check");
111
112/*
210183d4 113 * cmd_off: to switch the fan completely off and check if the fan is off
ded0cdfc
PF		 114 * cmd_auto: to set the BIOS in control of the fan. The BIOS regulates then
115 * the fan speed depending on the temperature
116 */
117struct fancmd {
118 u8 cmd_off;
119 u8 cmd_auto;
120};
e86435eb
PF		 121
122/* BIOS settings */
123struct bios_settings_t {
124 const char *vendor;
ded0cdfc 125 const char *product;
e86435eb
PF		 126 const char *version;
127 unsigned char fanreg;
128 unsigned char tempreg;
ded0cdfc 129 struct fancmd cmd;
e86435eb
PF		 130};
131
132/* Register addresses and values for different BIOS versions */
133static const struct bios_settings_t bios_tbl[] = {
ded0cdfc 134 /* AOA110 */
210183d4
PF		 135 {"Acer", "AOA110", "v0.3109", 0x55, 0x58, {0x1f, 0x00} },
136 {"Acer", "AOA110", "v0.3114", 0x55, 0x58, {0x1f, 0x00} },
137 {"Acer", "AOA110", "v0.3301", 0x55, 0x58, {0xaf, 0x00} },
138 {"Acer", "AOA110", "v0.3304", 0x55, 0x58, {0xaf, 0x00} },
139 {"Acer", "AOA110", "v0.3305", 0x55, 0x58, {0xaf, 0x00} },
140 {"Acer", "AOA110", "v0.3307", 0x55, 0x58, {0xaf, 0x00} },
141 {"Acer", "AOA110", "v0.3308", 0x55, 0x58, {0x21, 0x00} },
142 {"Acer", "AOA110", "v0.3309", 0x55, 0x58, {0x21, 0x00} },
143 {"Acer", "AOA110", "v0.3310", 0x55, 0x58, {0x21, 0x00} },
ded0cdfc 144 /* AOA150 */
210183d4
PF		 145 {"Acer", "AOA150", "v0.3114", 0x55, 0x58, {0x1f, 0x00} },
146 {"Acer", "AOA150", "v0.3301", 0x55, 0x58, {0x20, 0x00} },
147 {"Acer", "AOA150", "v0.3304", 0x55, 0x58, {0x20, 0x00} },
148 {"Acer", "AOA150", "v0.3305", 0x55, 0x58, {0x20, 0x00} },
149 {"Acer", "AOA150", "v0.3307", 0x55, 0x58, {0x20, 0x00} },
150 {"Acer", "AOA150", "v0.3308", 0x55, 0x58, {0x20, 0x00} },
151 {"Acer", "AOA150", "v0.3309", 0x55, 0x58, {0x20, 0x00} },
152 {"Acer", "AOA150", "v0.3310", 0x55, 0x58, {0x20, 0x00} },
43ae1e32
PF		 153 /* LT1005u */
154 {"Acer", "LT-10Q", "v0.3310", 0x55, 0x58, {0x20, 0x00} },
36065746 155 /* Acer 1410 */
24964639
PF		 156 {"Acer", "Aspire 1410", "v0.3108", 0x55, 0x58, {0x9e, 0x00} },
157 {"Acer", "Aspire 1410", "v0.3113", 0x55, 0x58, {0x9e, 0x00} },
210183d4 158 {"Acer", "Aspire 1410", "v0.3115", 0x55, 0x58, {0x9e, 0x00} },
24964639
PF		 159 {"Acer", "Aspire 1410", "v0.3117", 0x55, 0x58, {0x9e, 0x00} },
160 {"Acer", "Aspire 1410", "v0.3119", 0x55, 0x58, {0x9e, 0x00} },
210183d4 161 {"Acer", "Aspire 1410", "v0.3120", 0x55, 0x58, {0x9e, 0x00} },
24964639 162 {"Acer", "Aspire 1410", "v1.3204", 0x55, 0x58, {0x9e, 0x00} },
210183d4 163 {"Acer", "Aspire 1410", "v1.3303", 0x55, 0x58, {0x9e, 0x00} },
24964639
PF		 164 {"Acer", "Aspire 1410", "v1.3308", 0x55, 0x58, {0x9e, 0x00} },
165 {"Acer", "Aspire 1410", "v1.3310", 0x55, 0x58, {0x9e, 0x00} },
e39a9ba2 166 {"Acer", "Aspire 1410", "v1.3314", 0x55, 0x58, {0x9e, 0x00} },
94219d79 167 /* Acer 1810xx */
24964639
PF		 168 {"Acer", "Aspire 1810TZ", "v0.3108", 0x55, 0x58, {0x9e, 0x00} },
169 {"Acer", "Aspire 1810T", "v0.3108", 0x55, 0x58, {0x9e, 0x00} },
170 {"Acer", "Aspire 1810TZ", "v0.3113", 0x55, 0x58, {0x9e, 0x00} },
171 {"Acer", "Aspire 1810T", "v0.3113", 0x55, 0x58, {0x9e, 0x00} },
210183d4
PF		 172 {"Acer", "Aspire 1810TZ", "v0.3115", 0x55, 0x58, {0x9e, 0x00} },
173 {"Acer", "Aspire 1810T", "v0.3115", 0x55, 0x58, {0x9e, 0x00} },
24964639
PF		 174 {"Acer", "Aspire 1810TZ", "v0.3117", 0x55, 0x58, {0x9e, 0x00} },
175 {"Acer", "Aspire 1810T", "v0.3117", 0x55, 0x58, {0x9e, 0x00} },
210183d4
PF		 176 {"Acer", "Aspire 1810TZ", "v0.3119", 0x55, 0x58, {0x9e, 0x00} },
177 {"Acer", "Aspire 1810T", "v0.3119", 0x55, 0x58, {0x9e, 0x00} },
178 {"Acer", "Aspire 1810TZ", "v0.3120", 0x55, 0x58, {0x9e, 0x00} },
179 {"Acer", "Aspire 1810T", "v0.3120", 0x55, 0x58, {0x9e, 0x00} },
180 {"Acer", "Aspire 1810TZ", "v1.3204", 0x55, 0x58, {0x9e, 0x00} },
181 {"Acer", "Aspire 1810T", "v1.3204", 0x55, 0x58, {0x9e, 0x00} },
182 {"Acer", "Aspire 1810TZ", "v1.3303", 0x55, 0x58, {0x9e, 0x00} },
183 {"Acer", "Aspire 1810T", "v1.3303", 0x55, 0x58, {0x9e, 0x00} },
24964639
PF		 184 {"Acer", "Aspire 1810TZ", "v1.3308", 0x55, 0x58, {0x9e, 0x00} },
185 {"Acer", "Aspire 1810T", "v1.3308", 0x55, 0x58, {0x9e, 0x00} },
186 {"Acer", "Aspire 1810TZ", "v1.3310", 0x55, 0x58, {0x9e, 0x00} },
187 {"Acer", "Aspire 1810T", "v1.3310", 0x55, 0x58, {0x9e, 0x00} },
b06862ba 188 {"Acer", "Aspire 1810TZ", "v1.3314", 0x55, 0x58, {0x9e, 0x00} },
43ae1e32 189 {"Acer", "Aspire 1810T", "v1.3314", 0x55, 0x58, {0x9e, 0x00} },
24964639 190 /* Acer 531 */
43ae1e32 191 {"Acer", "AO531h", "v0.3104", 0x55, 0x58, {0x20, 0x00} },
24964639 192 {"Acer", "AO531h", "v0.3201", 0x55, 0x58, {0x20, 0x00} },
43ae1e32
PF		 193 {"Acer", "AO531h", "v0.3304", 0x55, 0x58, {0x20, 0x00} },
194 /* Acer 751 */
195 {"Acer", "AO751h", "V0.3212", 0x55, 0x58, {0x21, 0x00} },
196 /* Acer 1825 */
197 {"Acer", "Aspire 1825PTZ", "V1.3118", 0x55, 0x58, {0x9e, 0x00} },
198 {"Acer", "Aspire 1825PTZ", "V1.3127", 0x55, 0x58, {0x9e, 0x00} },
199 /* Acer TravelMate 7730 */
200 {"Acer", "TravelMate 7730G", "v0.3509", 0x55, 0x58, {0xaf, 0x00} },
94219d79 201 /* Gateway */
43ae1e32
PF		 202 {"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x00} },
203 {"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x00} },
204 {"Gateway", "LT31", "v1.3103", 0x55, 0x58, {0x9e, 0x00} },
205 {"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x9e, 0x00} },
206 {"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x9e, 0x00} },
207 {"Gateway", "LT31", "v1.3303t", 0x55, 0x58, {0x9e, 0x00} },
94219d79 208 /* Packard Bell */
43ae1e32
PF		 209 {"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00} },
210 {"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00} },
211 {"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x00} },
212 {"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00} },
213 {"Packard Bell", "ENBFT", "V1.3118", 0x55, 0x58, {0x9e, 0x00} },
214 {"Packard Bell", "ENBFT", "V1.3127", 0x55, 0x58, {0x9e, 0x00} },
215 {"Packard Bell", "DOTMU", "v1.3303", 0x55, 0x58, {0x9e, 0x00} },
216 {"Packard Bell", "DOTMU", "v0.3120", 0x55, 0x58, {0x9e, 0x00} },
217 {"Packard Bell", "DOTMU", "v0.3108", 0x55, 0x58, {0x9e, 0x00} },
218 {"Packard Bell", "DOTMU", "v0.3113", 0x55, 0x58, {0x9e, 0x00} },
219 {"Packard Bell", "DOTMU", "v0.3115", 0x55, 0x58, {0x9e, 0x00} },
220 {"Packard Bell", "DOTMU", "v0.3117", 0x55, 0x58, {0x9e, 0x00} },
221 {"Packard Bell", "DOTMU", "v0.3119", 0x55, 0x58, {0x9e, 0x00} },
222 {"Packard Bell", "DOTMU", "v1.3204", 0x55, 0x58, {0x9e, 0x00} },
223 {"Packard Bell", "DOTMA", "v1.3201", 0x55, 0x58, {0x9e, 0x00} },
224 {"Packard Bell", "DOTMA", "v1.3302", 0x55, 0x58, {0x9e, 0x00} },
225 {"Packard Bell", "DOTMA", "v1.3303t", 0x55, 0x58, {0x9e, 0x00} },
226 {"Packard Bell", "DOTVR46", "v1.3308", 0x55, 0x58, {0x9e, 0x00} },
ded0cdfc 227 /* pewpew-terminator */
210183d4 228 {"", "", "", 0, 0, {0, 0} }
e86435eb
PF		 229};
230
231static const struct bios_settings_t *bios_cfg __read_mostly;
232
e86435eb
PF		 233static int acerhdf_get_temp(int *temp)
234{
235 u8 read_temp;
236
237 if (ec_read(bios_cfg->tempreg, &read_temp))
238 return -EINVAL;
239
70052917 240 *temp = read_temp * 1000;
e86435eb
PF		 241
242 return 0;
243}
244
245static int acerhdf_get_fanstate(int *state)
246{
247 u8 fan;
e86435eb
PF		 248
249 if (ec_read(bios_cfg->fanreg, &fan))
250 return -EINVAL;
251
210183d4 252 if (fan != bios_cfg->cmd.cmd_off)
ded0cdfc
PF		 253 *state = ACERHDF_FAN_AUTO;
254 else
255 *state = ACERHDF_FAN_OFF;
e86435eb
PF		 256
257 return 0;
258}
259
260static void acerhdf_change_fanstate(int state)
261{
262 unsigned char cmd;
263
264 if (verbose)
eecc5bbc 265 pr_notice("fan %s\n", state == ACERHDF_FAN_OFF ? "OFF" : "ON");
e86435eb
PF		 266
267 if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) {
268 pr_err("invalid fan state %d requested, setting to auto!\n",
eecc5bbc 269 state);
e86435eb
PF		 270 state = ACERHDF_FAN_AUTO;
271 }
272
ded0cdfc
PF		 273 cmd = (state == ACERHDF_FAN_OFF) ? bios_cfg->cmd.cmd_off
274 : bios_cfg->cmd.cmd_auto;
e86435eb
PF		 275 fanstate = state;
276
277 ec_write(bios_cfg->fanreg, cmd);
278}
279
280static void acerhdf_check_param(struct thermal_zone_device *thermal)
281{
282 if (fanon > ACERHDF_MAX_FANON) {
283 pr_err("fanon temperature too high, set to %d\n",
eecc5bbc 284 ACERHDF_MAX_FANON);
e86435eb
PF		 285 fanon = ACERHDF_MAX_FANON;
286 }
287
288 if (kernelmode && prev_interval != interval) {
289 if (interval > ACERHDF_MAX_INTERVAL) {
290 pr_err("interval too high, set to %d\n",
eecc5bbc 291 ACERHDF_MAX_INTERVAL);
e86435eb
PF		 292 interval = ACERHDF_MAX_INTERVAL;
293 }
294 if (verbose)
eecc5bbc 295 pr_notice("interval changed to: %d\n", interval);
e86435eb
PF		 296 thermal->polling_delay = interval*1000;
297 prev_interval = interval;
298 }
299}
300
301/*
302 * This is the thermal zone callback which does the delayed polling of the fan
303 * state. We do check /sysfs-originating settings here in acerhdf_check_param()
304 * as late as the polling interval is since we can't do that in the respective
305 * accessors of the module parameters.
306 */
307static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal,
308 unsigned long *t)
309{
310 int temp, err = 0;
311
312 acerhdf_check_param(thermal);
313
314 err = acerhdf_get_temp(&temp);
315 if (err)
316 return err;
317
318 if (verbose)
319 pr_notice("temp %d\n", temp);
320
321 *t = temp;
322 return 0;
323}
324
325static int acerhdf_bind(struct thermal_zone_device *thermal,
326 struct thermal_cooling_device *cdev)
327{
328 /* if the cooling device is the one from acerhdf bind it */
329 if (cdev != cl_dev)
330 return 0;
331
332 if (thermal_zone_bind_cooling_device(thermal, 0, cdev)) {
333 pr_err("error binding cooling dev\n");
334 return -EINVAL;
335 }
336 return 0;
337}
338
339static int acerhdf_unbind(struct thermal_zone_device *thermal,
340 struct thermal_cooling_device *cdev)
341{
342 if (cdev != cl_dev)
343 return 0;
344
345 if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) {
346 pr_err("error unbinding cooling dev\n");
347 return -EINVAL;
348 }
349 return 0;
350}
351
352static inline void acerhdf_revert_to_bios_mode(void)
353{
354 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
355 kernelmode = 0;
356 if (thz_dev)
357 thz_dev->polling_delay = 0;
358 pr_notice("kernel mode fan control OFF\n");
359}
360static inline void acerhdf_enable_kernelmode(void)
361{
362 kernelmode = 1;
363
364 thz_dev->polling_delay = interval*1000;
365 thermal_zone_device_update(thz_dev);
366 pr_notice("kernel mode fan control ON\n");
367}
368
369static int acerhdf_get_mode(struct thermal_zone_device *thermal,
370 enum thermal_device_mode *mode)
371{
372 if (verbose)
373 pr_notice("kernel mode fan control %d\n", kernelmode);
374
375 *mode = (kernelmode) ? THERMAL_DEVICE_ENABLED
376 : THERMAL_DEVICE_DISABLED;
377
378 return 0;
379}
380
381/*
382 * set operation mode;
383 * enabled: the thermal layer of the kernel takes care about
384 * the temperature and the fan.
385 * disabled: the BIOS takes control of the fan.
386 */
387static int acerhdf_set_mode(struct thermal_zone_device *thermal,
388 enum thermal_device_mode mode)
389{
390 if (mode == THERMAL_DEVICE_DISABLED && kernelmode)
391 acerhdf_revert_to_bios_mode();
392 else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode)
393 acerhdf_enable_kernelmode();
394
395 return 0;
396}
397
398static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip,
399 enum thermal_trip_type *type)
400{
401 if (trip == 0)
402 *type = THERMAL_TRIP_ACTIVE;
403
404 return 0;
405}
406
407static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip,
408 unsigned long *temp)
409{
410 if (trip == 0)
411 *temp = fanon;
412
413 return 0;
414}
415
416static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal,
417 unsigned long *temperature)
418{
419 *temperature = ACERHDF_TEMP_CRIT;
420 return 0;
421}
422
423/* bind callback functions to thermalzone */
fedae5ad 424static struct thermal_zone_device_ops acerhdf_dev_ops = {
e86435eb
PF		 425 .bind = acerhdf_bind,
426 .unbind = acerhdf_unbind,
427 .get_temp = acerhdf_get_ec_temp,
428 .get_mode = acerhdf_get_mode,
429 .set_mode = acerhdf_set_mode,
430 .get_trip_type = acerhdf_get_trip_type,
431 .get_trip_temp = acerhdf_get_trip_temp,
432 .get_crit_temp = acerhdf_get_crit_temp,
433};
434
435
436/*
437 * cooling device callback functions
438 * get maximal fan cooling state
439 */
440static int acerhdf_get_max_state(struct thermal_cooling_device *cdev,
441 unsigned long *state)
442{
443 *state = 1;
444
445 return 0;
446}
447
448static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev,
449 unsigned long *state)
450{
451 int err = 0, tmp;
452
453 err = acerhdf_get_fanstate(&tmp);
454 if (err)
455 return err;
456
457 *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0;
458 return 0;
459}
460
461/* change current fan state - is overwritten when running in kernel mode */
462static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev,
463 unsigned long state)
464{
465 int cur_temp, cur_state, err = 0;
466
467 if (!kernelmode)
468 return 0;
469
470 err = acerhdf_get_temp(&cur_temp);
471 if (err) {
472 pr_err("error reading temperature, hand off control to BIOS\n");
473 goto err_out;
474 }
475
476 err = acerhdf_get_fanstate(&cur_state);
477 if (err) {
478 pr_err("error reading fan state, hand off control to BIOS\n");
479 goto err_out;
480 }
481
482 if (state == 0) {
483 /* turn fan off only if below fanoff temperature */
484 if ((cur_state == ACERHDF_FAN_AUTO) &&
485 (cur_temp < fanoff))
486 acerhdf_change_fanstate(ACERHDF_FAN_OFF);
487 } else {
488 if (cur_state == ACERHDF_FAN_OFF)
489 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
490 }
491 return 0;
492
493err_out:
494 acerhdf_revert_to_bios_mode();
495 return -EINVAL;
496}
497
498/* bind fan callbacks to fan device */
fedae5ad 499static struct thermal_cooling_device_ops acerhdf_cooling_ops = {
e86435eb
PF		 500 .get_max_state = acerhdf_get_max_state,
501 .get_cur_state = acerhdf_get_cur_state,
502 .set_cur_state = acerhdf_set_cur_state,
503};
504
505/* suspend / resume functionality */
ff27e1f3 506static int acerhdf_suspend(struct device *dev)
e86435eb
PF		 507{
508 if (kernelmode)
509 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
510
511 if (verbose)
512 pr_notice("going suspend\n");
513
514 return 0;
515}
516
e86435eb
PF		 517static int __devinit acerhdf_probe(struct platform_device *device)
518{
519 return 0;
520}
521
522static int acerhdf_remove(struct platform_device *device)
523{
524 return 0;
525}
526
47145210 527static const struct dev_pm_ops acerhdf_pm_ops = {
ff27e1f3
BP		 528 .suspend = acerhdf_suspend,
529 .freeze = acerhdf_suspend,
530};
531
ded0cdfc 532static struct platform_driver acerhdf_driver = {
e86435eb 533 .driver = {
ff27e1f3 534 .name = "acerhdf",
e86435eb 535 .owner = THIS_MODULE,
ff27e1f3 536 .pm = &acerhdf_pm_ops,
e86435eb
PF		 537 },
538 .probe = acerhdf_probe,
539 .remove = acerhdf_remove,
e86435eb
PF		 540};
541
dcbfb815
PF		 542/* checks if str begins with start */
543static int str_starts_with(const char *str, const char *start)
544{
545 unsigned long str_len = 0, start_len = 0;
546
547 str_len = strlen(str);
548 start_len = strlen(start);
549
550 if (str_len >= start_len &&
551 !strncmp(str, start, start_len))
552 return 1;
553
554 return 0;
555}
e86435eb
PF		 556
557/* check hardware */
558static int acerhdf_check_hardware(void)
559{
560 char const *vendor, *version, *product;
dcbfb815 561 const struct bios_settings_t *bt = NULL;
e86435eb
PF		 562
563 /* get BIOS data */
564 vendor = dmi_get_system_info(DMI_SYS_VENDOR);
565 version = dmi_get_system_info(DMI_BIOS_VERSION);
566 product = dmi_get_system_info(DMI_PRODUCT_NAME);
567
5cf4c07a
RC		 568 if (!vendor || !version || !product) {
569 pr_err("error getting hardware information\n");
570 return -EINVAL;
571 }
ded0cdfc 572
e86435eb
PF		 573 pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER);
574
ded0cdfc 575 if (force_bios[0]) {
e86435eb 576 version = force_bios;
ded0cdfc 577 pr_info("forcing BIOS version: %s\n", version);
e86435eb
PF		 578 kernelmode = 0;
579 }
580
ded0cdfc
PF		 581 if (force_product[0]) {
582 product = force_product;
583 pr_info("forcing BIOS product: %s\n", product);
584 kernelmode = 0;
585 }
586
e86435eb
PF		 587 if (verbose)
588 pr_info("BIOS info: %s %s, product: %s\n",
589 vendor, version, product);
590
591 /* search BIOS version and vendor in BIOS settings table */
dcbfb815
PF		 592 for (bt = bios_tbl; bt->vendor[0]; bt++) {
593 /*
594 * check if actual hardware BIOS vendor, product and version
595 * IDs start with the strings of BIOS table entry
596 */
597 if (str_starts_with(vendor, bt->vendor) &&
598 str_starts_with(product, bt->product) &&
599 str_starts_with(version, bt->version)) {
600 bios_cfg = bt;
e86435eb
PF		 601 break;
602 }
603 }
604
605 if (!bios_cfg) {
eecc5bbc
JP		 606 pr_err("unknown (unsupported) BIOS version %s/%s/%s, please report, aborting!\n",
607 vendor, product, version);
e86435eb
PF		 608 return -EINVAL;
609 }
610
611 /*
612 * if started with kernel mode off, prevent the kernel from switching
613 * off the fan
614 */
615 if (!kernelmode) {
616 pr_notice("Fan control off, to enable do:\n");
eecc5bbc 617 pr_notice("echo -n \"enabled\" > /sys/class/thermal/thermal_zone0/mode\n");
e86435eb
PF		 618 }
619
620 return 0;
621}
622
623static int acerhdf_register_platform(void)
624{
625 int err = 0;
626
ded0cdfc 627 err = platform_driver_register(&acerhdf_driver);
e86435eb
PF		 628 if (err)
629 return err;
630
631 acerhdf_dev = platform_device_alloc("acerhdf", -1);
a0dba697
AL		 632 if (!acerhdf_dev) {
633 err = -ENOMEM;
634 goto err_device_alloc;
635 }
636 err = platform_device_add(acerhdf_dev);
637 if (err)
638 goto err_device_add;
e86435eb
PF		 639
640 return 0;
a0dba697
AL		 641
642err_device_add:
643 platform_device_put(acerhdf_dev);
644err_device_alloc:
645 platform_driver_unregister(&acerhdf_driver);
646 return err;
e86435eb
PF		 647}
648
649static void acerhdf_unregister_platform(void)
650{
a0dba697 651 platform_device_unregister(acerhdf_dev);
ded0cdfc 652 platform_driver_unregister(&acerhdf_driver);
e86435eb
PF		 653}
654
655static int acerhdf_register_thermal(void)
656{
657 cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL,
658 &acerhdf_cooling_ops);
659
660 if (IS_ERR(cl_dev))
661 return -EINVAL;
662
c56f5c03 663 thz_dev = thermal_zone_device_register("acerhdf", 1, 0, NULL,
e86435eb
PF		 664 &acerhdf_dev_ops, 0, 0, 0,
665 (kernelmode) ? interval*1000 : 0);
666 if (IS_ERR(thz_dev))
667 return -EINVAL;
668
669 return 0;
670}
671
672static void acerhdf_unregister_thermal(void)
673{
674 if (cl_dev) {
675 thermal_cooling_device_unregister(cl_dev);
676 cl_dev = NULL;
677 }
678
679 if (thz_dev) {
680 thermal_zone_device_unregister(thz_dev);
681 thz_dev = NULL;
682 }
683}
684
685static int __init acerhdf_init(void)
686{
687 int err = 0;
688
689 err = acerhdf_check_hardware();
690 if (err)
691 goto out_err;
692
693 err = acerhdf_register_platform();
694 if (err)
a0dba697 695 goto out_err;
e86435eb
PF		 696
697 err = acerhdf_register_thermal();
698 if (err)
699 goto err_unreg;
700
701 return 0;
702
703err_unreg:
704 acerhdf_unregister_thermal();
705 acerhdf_unregister_platform();
706
707out_err:
a0dba697 708 return err;
e86435eb
PF		 709}
710
711static void __exit acerhdf_exit(void)
712{
713 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
714 acerhdf_unregister_thermal();
715 acerhdf_unregister_platform();
716}
717
718MODULE_LICENSE("GPL");
719MODULE_AUTHOR("Peter Feuerer");
720MODULE_DESCRIPTION("Aspire One temperature and fan driver");
bdc731bc 721MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:");
43ae1e32 722MODULE_ALIAS("dmi:*:*Acer*:pnAO751h*:");
2c3422d9
AB		 723MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1410*:");
724MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1810*:");
43ae1e32 725MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1825PTZ:");
24964639 726MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:");
43ae1e32 727MODULE_ALIAS("dmi:*:*Acer*:TravelMate*7730G:");
bdc731bc 728MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:");
94219d79 729MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:");
2c3422d9
AB		 730MODULE_ALIAS("dmi:*:*Packard*Bell*:pnAOA*:");
731MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOA*:");
732MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMU*:");
43ae1e32 733MODULE_ALIAS("dmi:*:*Packard*Bell*:pnENBFT*:");
2c3422d9 734MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMA*:");
43ae1e32 735MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTVR46*:");
e86435eb
PF		 736
737module_init(acerhdf_init);
738module_exit(acerhdf_exit);
kernel source for telekom puls (alcatel/mediatek)