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thermal: add available policies sysfs attribute
[deliverable/linux.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
48c8dd64 53#define DRV_VER "0.7.0"
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 121
5ef6578c
PF		 122struct manualcmd {
123 u8 mreg;
124 u8 moff;
125};
126
127/* default register and command to disable fan in manual mode */
128static const struct manualcmd mcmd = {
129 .mreg = 0x94,
130 .moff = 0xff,
131};
132
e86435eb 133/* BIOS settings */
f587f07f 134struct bios_settings {
e86435eb 135 const char *vendor;
ded0cdfc 136 const char *product;
e86435eb 137 const char *version;
f587f07f
PF		 138 u8 fanreg;
139 u8 tempreg;
ded0cdfc 140 struct fancmd cmd;
5ef6578c 141 int mcmd_enable;
e86435eb
PF		 142};
143
144/* Register addresses and values for different BIOS versions */
f587f07f 145static const struct bios_settings bios_tbl[] = {
ded0cdfc 146 /* AOA110 */
5ef6578c
PF		 147 {"Acer", "AOA110", "v0.3109", 0x55, 0x58, {0x1f, 0x00}, 0},
148 {"Acer", "AOA110", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0},
149 {"Acer", "AOA110", "v0.3301", 0x55, 0x58, {0xaf, 0x00}, 0},
150 {"Acer", "AOA110", "v0.3304", 0x55, 0x58, {0xaf, 0x00}, 0},
151 {"Acer", "AOA110", "v0.3305", 0x55, 0x58, {0xaf, 0x00}, 0},
152 {"Acer", "AOA110", "v0.3307", 0x55, 0x58, {0xaf, 0x00}, 0},
153 {"Acer", "AOA110", "v0.3308", 0x55, 0x58, {0x21, 0x00}, 0},
154 {"Acer", "AOA110", "v0.3309", 0x55, 0x58, {0x21, 0x00}, 0},
155 {"Acer", "AOA110", "v0.3310", 0x55, 0x58, {0x21, 0x00}, 0},
ded0cdfc 156 /* AOA150 */
5ef6578c
PF		 157 {"Acer", "AOA150", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0},
158 {"Acer", "AOA150", "v0.3301", 0x55, 0x58, {0x20, 0x00}, 0},
159 {"Acer", "AOA150", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0},
160 {"Acer", "AOA150", "v0.3305", 0x55, 0x58, {0x20, 0x00}, 0},
161 {"Acer", "AOA150", "v0.3307", 0x55, 0x58, {0x20, 0x00}, 0},
162 {"Acer", "AOA150", "v0.3308", 0x55, 0x58, {0x20, 0x00}, 0},
163 {"Acer", "AOA150", "v0.3309", 0x55, 0x58, {0x20, 0x00}, 0},
164 {"Acer", "AOA150", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0},
43ae1e32 165 /* LT1005u */
5ef6578c 166 {"Acer", "LT-10Q", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0},
36065746 167 /* Acer 1410 */
5ef6578c
PF		 168 {"Acer", "Aspire 1410", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},
169 {"Acer", "Aspire 1410", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},
170 {"Acer", "Aspire 1410", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},
171 {"Acer", "Aspire 1410", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},
172 {"Acer", "Aspire 1410", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},
173 {"Acer", "Aspire 1410", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},
174 {"Acer", "Aspire 1410", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},
175 {"Acer", "Aspire 1410", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},
176 {"Acer", "Aspire 1410", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},
177 {"Acer", "Aspire 1410", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0},
178 {"Acer", "Aspire 1410", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0},
94219d79 179 /* Acer 1810xx */
5ef6578c
PF		 180 {"Acer", "Aspire 1810TZ", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},
181 {"Acer", "Aspire 1810T", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},
182 {"Acer", "Aspire 1810TZ", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},
183 {"Acer", "Aspire 1810T", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},
184 {"Acer", "Aspire 1810TZ", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},
185 {"Acer", "Aspire 1810T", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},
186 {"Acer", "Aspire 1810TZ", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},
187 {"Acer", "Aspire 1810T", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},
188 {"Acer", "Aspire 1810TZ", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},
189 {"Acer", "Aspire 1810T", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},
190 {"Acer", "Aspire 1810TZ", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},
191 {"Acer", "Aspire 1810T", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},
192 {"Acer", "Aspire 1810TZ", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},
193 {"Acer", "Aspire 1810T", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},
194 {"Acer", "Aspire 1810TZ", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},
195 {"Acer", "Aspire 1810T", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},
196 {"Acer", "Aspire 1810TZ", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},
197 {"Acer", "Aspire 1810T", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},
198 {"Acer", "Aspire 1810TZ", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0},
199 {"Acer", "Aspire 1810T", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0},
200 {"Acer", "Aspire 1810TZ", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0},
201 {"Acer", "Aspire 1810T", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0},
7438d990
PF		 202 /* Acer 5755G */
203 {"Acer", "Aspire 5755G", "V1.20", 0xab, 0xb4, {0x00, 0x08}, 0},
204 {"Acer", "Aspire 5755G", "V1.21", 0xab, 0xb3, {0x00, 0x08}, 0},
205 /* Acer 521 */
206 {"Acer", "AO521", "V1.11", 0x55, 0x58, {0x1f, 0x00}, 0},
24964639 207 /* Acer 531 */
5ef6578c
PF		 208 {"Acer", "AO531h", "v0.3104", 0x55, 0x58, {0x20, 0x00}, 0},
209 {"Acer", "AO531h", "v0.3201", 0x55, 0x58, {0x20, 0x00}, 0},
210 {"Acer", "AO531h", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0},
43ae1e32 211 /* Acer 751 */
7438d990 212 {"Acer", "AO751h", "V0.3206", 0x55, 0x58, {0x21, 0x00}, 0},
5ef6578c 213 {"Acer", "AO751h", "V0.3212", 0x55, 0x58, {0x21, 0x00}, 0},
7438d990
PF		 214 /* Acer 753 */
215 {"Acer", "Aspire One 753", "V1.24", 0x93, 0xac, {0x14, 0x04}, 1},
43ae1e32 216 /* Acer 1825 */
5ef6578c
PF		 217 {"Acer", "Aspire 1825PTZ", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0},
218 {"Acer", "Aspire 1825PTZ", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0},
7438d990
PF		 219 /* Acer Extensa 5420 */
220 {"Acer", "Extensa 5420", "V1.17", 0x93, 0xac, {0x14, 0x04}, 1},
221 /* Acer Aspire 5315 */
222 {"Acer", "Aspire 5315", "V1.19", 0x93, 0xac, {0x14, 0x04}, 1},
223 /* Acer Aspire 5739 */
224 {"Acer", "Aspire 5739G", "V1.3311", 0x55, 0x58, {0x20, 0x00}, 0},
43ae1e32 225 /* Acer TravelMate 7730 */
5ef6578c 226 {"Acer", "TravelMate 7730G", "v0.3509", 0x55, 0x58, {0xaf, 0x00}, 0},
7438d990
PF		 227 /* Acer TravelMate TM8573T */
228 {"Acer", "TM8573T", "V1.13", 0x93, 0xa8, {0x14, 0x04}, 1},
94219d79 229 /* Gateway */
5ef6578c
PF		 230 {"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x00}, 0},
231 {"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x00}, 0},
232 {"Gateway", "LT31", "v1.3103", 0x55, 0x58, {0x9e, 0x00}, 0},
233 {"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0},
234 {"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0},
235 {"Gateway", "LT31", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0},
94219d79 236 /* Packard Bell */
5ef6578c
PF		 237 {"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00}, 0},
238 {"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0},
239 {"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x00}, 0},
240 {"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0},
241 {"Packard Bell", "ENBFT", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0},
242 {"Packard Bell", "ENBFT", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0},
243 {"Packard Bell", "DOTMU", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},
244 {"Packard Bell", "DOTMU", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},
245 {"Packard Bell", "DOTMU", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},
246 {"Packard Bell", "DOTMU", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},
247 {"Packard Bell", "DOTMU", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},
248 {"Packard Bell", "DOTMU", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},
249 {"Packard Bell", "DOTMU", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},
250 {"Packard Bell", "DOTMU", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},
251 {"Packard Bell", "DOTMA", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0},
252 {"Packard Bell", "DOTMA", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0},
253 {"Packard Bell", "DOTMA", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0},
254 {"Packard Bell", "DOTVR46", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},
ded0cdfc 255 /* pewpew-terminator */
5ef6578c 256 {"", "", "", 0, 0, {0, 0}, 0}
e86435eb
PF		 257};
258
f587f07f 259static const struct bios_settings *bios_cfg __read_mostly;
e86435eb 260
48c8dd64
PF		 261/*
262 * this struct is used to instruct thermal layer to use bang_bang instead of
263 * default governor for acerhdf
264 */
265static struct thermal_zone_params acerhdf_zone_params = {
266 .governor_name = "bang_bang",
267};
e86435eb 268
e86435eb
PF		 269static int acerhdf_get_temp(int *temp)
270{
271 u8 read_temp;
272
273 if (ec_read(bios_cfg->tempreg, &read_temp))
274 return -EINVAL;
275
70052917 276 *temp = read_temp * 1000;
e86435eb
PF		 277
278 return 0;
279}
280
281static int acerhdf_get_fanstate(int *state)
282{
283 u8 fan;
e86435eb
PF		 284
285 if (ec_read(bios_cfg->fanreg, &fan))
286 return -EINVAL;
287
210183d4 288 if (fan != bios_cfg->cmd.cmd_off)
ded0cdfc
PF		 289 *state = ACERHDF_FAN_AUTO;
290 else
291 *state = ACERHDF_FAN_OFF;
e86435eb
PF		 292
293 return 0;
294}
295
296static void acerhdf_change_fanstate(int state)
297{
298 unsigned char cmd;
299
300 if (verbose)
eecc5bbc 301 pr_notice("fan %s\n", state == ACERHDF_FAN_OFF ? "OFF" : "ON");
e86435eb
PF		 302
303 if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) {
304 pr_err("invalid fan state %d requested, setting to auto!\n",
eecc5bbc 305 state);
e86435eb
PF		 306 state = ACERHDF_FAN_AUTO;
307 }
308
ded0cdfc
PF		 309 cmd = (state == ACERHDF_FAN_OFF) ? bios_cfg->cmd.cmd_off
310 : bios_cfg->cmd.cmd_auto;
e86435eb
PF		 311 fanstate = state;
312
313 ec_write(bios_cfg->fanreg, cmd);
5ef6578c
PF		 314
315 if (bios_cfg->mcmd_enable && state == ACERHDF_FAN_OFF) {
316 if (verbose)
317 pr_notice("turning off fan manually\n");
318 ec_write(mcmd.mreg, mcmd.moff);
319 }
e86435eb
PF		 320}
321
322static void acerhdf_check_param(struct thermal_zone_device *thermal)
323{
324 if (fanon > ACERHDF_MAX_FANON) {
325 pr_err("fanon temperature too high, set to %d\n",
eecc5bbc 326 ACERHDF_MAX_FANON);
e86435eb
PF		 327 fanon = ACERHDF_MAX_FANON;
328 }
329
330 if (kernelmode && prev_interval != interval) {
331 if (interval > ACERHDF_MAX_INTERVAL) {
332 pr_err("interval too high, set to %d\n",
eecc5bbc 333 ACERHDF_MAX_INTERVAL);
e86435eb
PF		 334 interval = ACERHDF_MAX_INTERVAL;
335 }
336 if (verbose)
eecc5bbc 337 pr_notice("interval changed to: %d\n", interval);
e86435eb
PF		 338 thermal->polling_delay = interval*1000;
339 prev_interval = interval;
340 }
341}
342
343/*
344 * This is the thermal zone callback which does the delayed polling of the fan
345 * state. We do check /sysfs-originating settings here in acerhdf_check_param()
346 * as late as the polling interval is since we can't do that in the respective
347 * accessors of the module parameters.
348 */
349static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal,
350 unsigned long *t)
351{
352 int temp, err = 0;
353
354 acerhdf_check_param(thermal);
355
356 err = acerhdf_get_temp(&temp);
357 if (err)
358 return err;
359
360 if (verbose)
361 pr_notice("temp %d\n", temp);
362
363 *t = temp;
364 return 0;
365}
366
367static int acerhdf_bind(struct thermal_zone_device *thermal,
368 struct thermal_cooling_device *cdev)
369{
370 /* if the cooling device is the one from acerhdf bind it */
371 if (cdev != cl_dev)
372 return 0;
373
9d99842f 374 if (thermal_zone_bind_cooling_device(thermal, 0, cdev,
6cd9e9f6
KS		 375 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT,
376 THERMAL_WEIGHT_DEFAULT)) {
e86435eb
PF		 377 pr_err("error binding cooling dev\n");
378 return -EINVAL;
379 }
380 return 0;
381}
382
383static int acerhdf_unbind(struct thermal_zone_device *thermal,
384 struct thermal_cooling_device *cdev)
385{
386 if (cdev != cl_dev)
387 return 0;
388
389 if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) {
390 pr_err("error unbinding cooling dev\n");
391 return -EINVAL;
392 }
393 return 0;
394}
395
396static inline void acerhdf_revert_to_bios_mode(void)
397{
398 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
399 kernelmode = 0;
400 if (thz_dev)
401 thz_dev->polling_delay = 0;
402 pr_notice("kernel mode fan control OFF\n");
403}
404static inline void acerhdf_enable_kernelmode(void)
405{
406 kernelmode = 1;
407
408 thz_dev->polling_delay = interval*1000;
409 thermal_zone_device_update(thz_dev);
410 pr_notice("kernel mode fan control ON\n");
411}
412
413static int acerhdf_get_mode(struct thermal_zone_device *thermal,
414 enum thermal_device_mode *mode)
415{
416 if (verbose)
417 pr_notice("kernel mode fan control %d\n", kernelmode);
418
419 *mode = (kernelmode) ? THERMAL_DEVICE_ENABLED
420 : THERMAL_DEVICE_DISABLED;
421
422 return 0;
423}
424
425/*
426 * set operation mode;
427 * enabled: the thermal layer of the kernel takes care about
428 * the temperature and the fan.
429 * disabled: the BIOS takes control of the fan.
430 */
431static int acerhdf_set_mode(struct thermal_zone_device *thermal,
432 enum thermal_device_mode mode)
433{
434 if (mode == THERMAL_DEVICE_DISABLED && kernelmode)
435 acerhdf_revert_to_bios_mode();
436 else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode)
437 acerhdf_enable_kernelmode();
438
439 return 0;
440}
441
442static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip,
443 enum thermal_trip_type *type)
444{
445 if (trip == 0)
446 *type = THERMAL_TRIP_ACTIVE;
7e8b6d73
PF		 447 else if (trip == 1)
448 *type = THERMAL_TRIP_CRITICAL;
449 else
450 return -EINVAL;
e86435eb
PF		 451
452 return 0;
453}
454
48c8dd64
PF		 455static int acerhdf_get_trip_hyst(struct thermal_zone_device *thermal, int trip,
456 unsigned long *temp)
457{
458 if (trip != 0)
459 return -EINVAL;
460
461 *temp = fanon - fanoff;
e86435eb
PF		 462
463 return 0;
464}
465
466static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip,
467 unsigned long *temp)
468{
469 if (trip == 0)
470 *temp = fanon;
7e8b6d73
PF		 471 else if (trip == 1)
472 *temp = ACERHDF_TEMP_CRIT;
473 else
474 return -EINVAL;
e86435eb
PF		 475
476 return 0;
477}
478
479static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal,
480 unsigned long *temperature)
481{
482 *temperature = ACERHDF_TEMP_CRIT;
483 return 0;
484}
485
486/* bind callback functions to thermalzone */
fedae5ad 487static struct thermal_zone_device_ops acerhdf_dev_ops = {
e86435eb
PF		 488 .bind = acerhdf_bind,
489 .unbind = acerhdf_unbind,
490 .get_temp = acerhdf_get_ec_temp,
491 .get_mode = acerhdf_get_mode,
492 .set_mode = acerhdf_set_mode,
493 .get_trip_type = acerhdf_get_trip_type,
48c8dd64 494 .get_trip_hyst = acerhdf_get_trip_hyst,
e86435eb
PF		 495 .get_trip_temp = acerhdf_get_trip_temp,
496 .get_crit_temp = acerhdf_get_crit_temp,
497};
498
499
500/*
501 * cooling device callback functions
502 * get maximal fan cooling state
503 */
504static int acerhdf_get_max_state(struct thermal_cooling_device *cdev,
505 unsigned long *state)
506{
507 *state = 1;
508
509 return 0;
510}
511
512static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev,
513 unsigned long *state)
514{
515 int err = 0, tmp;
516
517 err = acerhdf_get_fanstate(&tmp);
518 if (err)
519 return err;
520
521 *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0;
522 return 0;
523}
524
525/* change current fan state - is overwritten when running in kernel mode */
526static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev,
527 unsigned long state)
528{
529 int cur_temp, cur_state, err = 0;
530
531 if (!kernelmode)
532 return 0;
533
534 err = acerhdf_get_temp(&cur_temp);
535 if (err) {
536 pr_err("error reading temperature, hand off control to BIOS\n");
537 goto err_out;
538 }
539
540 err = acerhdf_get_fanstate(&cur_state);
541 if (err) {
542 pr_err("error reading fan state, hand off control to BIOS\n");
543 goto err_out;
544 }
545
546 if (state == 0) {
48c8dd64 547 if (cur_state == ACERHDF_FAN_AUTO)
e86435eb
PF		 548 acerhdf_change_fanstate(ACERHDF_FAN_OFF);
549 } else {
550 if (cur_state == ACERHDF_FAN_OFF)
551 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
552 }
553 return 0;
554
555err_out:
556 acerhdf_revert_to_bios_mode();
557 return -EINVAL;
558}
559
560/* bind fan callbacks to fan device */
fedae5ad 561static struct thermal_cooling_device_ops acerhdf_cooling_ops = {
e86435eb
PF		 562 .get_max_state = acerhdf_get_max_state,
563 .get_cur_state = acerhdf_get_cur_state,
564 .set_cur_state = acerhdf_set_cur_state,
565};
566
567/* suspend / resume functionality */
ff27e1f3 568static int acerhdf_suspend(struct device *dev)
e86435eb
PF		 569{
570 if (kernelmode)
571 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
572
573 if (verbose)
574 pr_notice("going suspend\n");
575
576 return 0;
577}
578
b859f159 579static int acerhdf_probe(struct platform_device *device)
e86435eb
PF		 580{
581 return 0;
582}
583
584static int acerhdf_remove(struct platform_device *device)
585{
586 return 0;
587}
588
47145210 589static const struct dev_pm_ops acerhdf_pm_ops = {
ff27e1f3
BP		 590 .suspend = acerhdf_suspend,
591 .freeze = acerhdf_suspend,
592};
593
ded0cdfc 594static struct platform_driver acerhdf_driver = {
e86435eb 595 .driver = {
ff27e1f3 596 .name = "acerhdf",
ff27e1f3 597 .pm = &acerhdf_pm_ops,
e86435eb
PF		 598 },
599 .probe = acerhdf_probe,
600 .remove = acerhdf_remove,
e86435eb
PF		 601};
602
dcbfb815
PF		 603/* checks if str begins with start */
604static int str_starts_with(const char *str, const char *start)
605{
606 unsigned long str_len = 0, start_len = 0;
607
608 str_len = strlen(str);
609 start_len = strlen(start);
610
611 if (str_len >= start_len &&
612 !strncmp(str, start, start_len))
613 return 1;
614
615 return 0;
616}
e86435eb
PF		 617
618/* check hardware */
619static int acerhdf_check_hardware(void)
620{
621 char const *vendor, *version, *product;
f587f07f 622 const struct bios_settings *bt = NULL;
e86435eb
PF		 623
624 /* get BIOS data */
625 vendor = dmi_get_system_info(DMI_SYS_VENDOR);
626 version = dmi_get_system_info(DMI_BIOS_VERSION);
627 product = dmi_get_system_info(DMI_PRODUCT_NAME);
628
5cf4c07a
RC		 629 if (!vendor || !version || !product) {
630 pr_err("error getting hardware information\n");
631 return -EINVAL;
632 }
ded0cdfc 633
e86435eb
PF		 634 pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER);
635
ded0cdfc 636 if (force_bios[0]) {
e86435eb 637 version = force_bios;
ded0cdfc 638 pr_info("forcing BIOS version: %s\n", version);
e86435eb
PF		 639 kernelmode = 0;
640 }
641
ded0cdfc
PF		 642 if (force_product[0]) {
643 product = force_product;
644 pr_info("forcing BIOS product: %s\n", product);
645 kernelmode = 0;
646 }
647
e86435eb
PF		 648 if (verbose)
649 pr_info("BIOS info: %s %s, product: %s\n",
650 vendor, version, product);
651
652 /* search BIOS version and vendor in BIOS settings table */
dcbfb815
PF		 653 for (bt = bios_tbl; bt->vendor[0]; bt++) {
654 /*
655 * check if actual hardware BIOS vendor, product and version
656 * IDs start with the strings of BIOS table entry
657 */
658 if (str_starts_with(vendor, bt->vendor) &&
659 str_starts_with(product, bt->product) &&
660 str_starts_with(version, bt->version)) {
661 bios_cfg = bt;
e86435eb
PF		 662 break;
663 }
664 }
665
666 if (!bios_cfg) {
eecc5bbc
JP		 667 pr_err("unknown (unsupported) BIOS version %s/%s/%s, please report, aborting!\n",
668 vendor, product, version);
e86435eb
PF		 669 return -EINVAL;
670 }
671
672 /*
673 * if started with kernel mode off, prevent the kernel from switching
674 * off the fan
675 */
676 if (!kernelmode) {
677 pr_notice("Fan control off, to enable do:\n");
eecc5bbc 678 pr_notice("echo -n \"enabled\" > /sys/class/thermal/thermal_zone0/mode\n");
e86435eb
PF		 679 }
680
681 return 0;
682}
683
684static int acerhdf_register_platform(void)
685{
686 int err = 0;
687
ded0cdfc 688 err = platform_driver_register(&acerhdf_driver);
e86435eb
PF		 689 if (err)
690 return err;
691
692 acerhdf_dev = platform_device_alloc("acerhdf", -1);
a0dba697
AL		 693 if (!acerhdf_dev) {
694 err = -ENOMEM;
695 goto err_device_alloc;
696 }
697 err = platform_device_add(acerhdf_dev);
698 if (err)
699 goto err_device_add;
e86435eb
PF		 700
701 return 0;
a0dba697
AL		 702
703err_device_add:
704 platform_device_put(acerhdf_dev);
705err_device_alloc:
706 platform_driver_unregister(&acerhdf_driver);
707 return err;
e86435eb
PF		 708}
709
710static void acerhdf_unregister_platform(void)
711{
a0dba697 712 platform_device_unregister(acerhdf_dev);
ded0cdfc 713 platform_driver_unregister(&acerhdf_driver);
e86435eb
PF		 714}
715
716static int acerhdf_register_thermal(void)
717{
718 cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL,
719 &acerhdf_cooling_ops);
720
721 if (IS_ERR(cl_dev))
722 return -EINVAL;
723
7e8b6d73 724 thz_dev = thermal_zone_device_register("acerhdf", 2, 0, NULL,
48c8dd64
PF		 725 &acerhdf_dev_ops,
726 &acerhdf_zone_params, 0,
e86435eb
PF		 727 (kernelmode) ? interval*1000 : 0);
728 if (IS_ERR(thz_dev))
729 return -EINVAL;
730
48c8dd64
PF		 731 if (strcmp(thz_dev->governor->name,
732 acerhdf_zone_params.governor_name)) {
733 pr_err("Didn't get thermal governor %s, perhaps not compiled into thermal subsystem.\n",
734 acerhdf_zone_params.governor_name);
735 return -EINVAL;
736 }
737
e86435eb
PF		 738 return 0;
739}
740
741static void acerhdf_unregister_thermal(void)
742{
743 if (cl_dev) {
744 thermal_cooling_device_unregister(cl_dev);
745 cl_dev = NULL;
746 }
747
748 if (thz_dev) {
749 thermal_zone_device_unregister(thz_dev);
750 thz_dev = NULL;
751 }
752}
753
754static int __init acerhdf_init(void)
755{
756 int err = 0;
757
758 err = acerhdf_check_hardware();
759 if (err)
760 goto out_err;
761
762 err = acerhdf_register_platform();
763 if (err)
a0dba697 764 goto out_err;
e86435eb
PF		 765
766 err = acerhdf_register_thermal();
767 if (err)
768 goto err_unreg;
769
770 return 0;
771
772err_unreg:
773 acerhdf_unregister_thermal();
774 acerhdf_unregister_platform();
775
776out_err:
a0dba697 777 return err;
e86435eb
PF		 778}
779
780static void __exit acerhdf_exit(void)
781{
782 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
783 acerhdf_unregister_thermal();
784 acerhdf_unregister_platform();
785}
786
787MODULE_LICENSE("GPL");
788MODULE_AUTHOR("Peter Feuerer");
789MODULE_DESCRIPTION("Aspire One temperature and fan driver");
bdc731bc 790MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:");
43ae1e32 791MODULE_ALIAS("dmi:*:*Acer*:pnAO751h*:");
2c3422d9
AB		 792MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1410*:");
793MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1810*:");
7438d990 794MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5755G:");
43ae1e32 795MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1825PTZ:");
7438d990 796MODULE_ALIAS("dmi:*:*Acer*:pnAO521*:");
24964639 797MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:");
7438d990
PF		 798MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5739G:");
799MODULE_ALIAS("dmi:*:*Acer*:pnAspire*One*753:");
800MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5315:");
43ae1e32 801MODULE_ALIAS("dmi:*:*Acer*:TravelMate*7730G:");
7438d990 802MODULE_ALIAS("dmi:*:*Acer*:TM8573T:");
bdc731bc 803MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:");
94219d79 804MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:");
2c3422d9
AB		 805MODULE_ALIAS("dmi:*:*Packard*Bell*:pnAOA*:");
806MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOA*:");
807MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMU*:");
43ae1e32 808MODULE_ALIAS("dmi:*:*Packard*Bell*:pnENBFT*:");
2c3422d9 809MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMA*:");
43ae1e32 810MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTVR46*:");
7438d990 811MODULE_ALIAS("dmi:*:*Acer*:pnExtensa 5420*:");
e86435eb
PF		 812
813module_init(acerhdf_init);
814module_exit(acerhdf_exit);
Linux kernel - Deliverables
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