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acerhdf: Adding support for new models
[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
7438d990 53#define DRV_VER "0.5.30"
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
PF		 133/* BIOS settings */
134struct bios_settings_t {
135 const char *vendor;
ded0cdfc 136 const char *product;
e86435eb
PF		 137 const char *version;
138 unsigned char fanreg;
139 unsigned char tempreg;
ded0cdfc 140 struct fancmd cmd;
5ef6578c 141 int mcmd_enable;
e86435eb
PF		 142};
143
144/* Register addresses and values for different BIOS versions */
145static const struct bios_settings_t 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
259static const struct bios_settings_t *bios_cfg __read_mostly;
260
e86435eb
PF		 261static int acerhdf_get_temp(int *temp)
262{
263 u8 read_temp;
264
265 if (ec_read(bios_cfg->tempreg, &read_temp))
266 return -EINVAL;
267
70052917 268 *temp = read_temp * 1000;
e86435eb
PF		 269
270 return 0;
271}
272
273static int acerhdf_get_fanstate(int *state)
274{
275 u8 fan;
e86435eb
PF		 276
277 if (ec_read(bios_cfg->fanreg, &fan))
278 return -EINVAL;
279
210183d4 280 if (fan != bios_cfg->cmd.cmd_off)
ded0cdfc
PF		 281 *state = ACERHDF_FAN_AUTO;
282 else
283 *state = ACERHDF_FAN_OFF;
e86435eb
PF		 284
285 return 0;
286}
287
288static void acerhdf_change_fanstate(int state)
289{
290 unsigned char cmd;
291
292 if (verbose)
eecc5bbc 293 pr_notice("fan %s\n", state == ACERHDF_FAN_OFF ? "OFF" : "ON");
e86435eb
PF		 294
295 if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) {
296 pr_err("invalid fan state %d requested, setting to auto!\n",
eecc5bbc 297 state);
e86435eb
PF		 298 state = ACERHDF_FAN_AUTO;
299 }
300
ded0cdfc
PF		 301 cmd = (state == ACERHDF_FAN_OFF) ? bios_cfg->cmd.cmd_off
302 : bios_cfg->cmd.cmd_auto;
e86435eb
PF		 303 fanstate = state;
304
305 ec_write(bios_cfg->fanreg, cmd);
5ef6578c
PF		 306
307 if (bios_cfg->mcmd_enable && state == ACERHDF_FAN_OFF) {
308 if (verbose)
309 pr_notice("turning off fan manually\n");
310 ec_write(mcmd.mreg, mcmd.moff);
311 }
e86435eb
PF		 312}
313
314static void acerhdf_check_param(struct thermal_zone_device *thermal)
315{
316 if (fanon > ACERHDF_MAX_FANON) {
317 pr_err("fanon temperature too high, set to %d\n",
eecc5bbc 318 ACERHDF_MAX_FANON);
e86435eb
PF		 319 fanon = ACERHDF_MAX_FANON;
320 }
321
322 if (kernelmode && prev_interval != interval) {
323 if (interval > ACERHDF_MAX_INTERVAL) {
324 pr_err("interval too high, set to %d\n",
eecc5bbc 325 ACERHDF_MAX_INTERVAL);
e86435eb
PF		 326 interval = ACERHDF_MAX_INTERVAL;
327 }
328 if (verbose)
eecc5bbc 329 pr_notice("interval changed to: %d\n", interval);
e86435eb
PF		 330 thermal->polling_delay = interval*1000;
331 prev_interval = interval;
332 }
333}
334
335/*
336 * This is the thermal zone callback which does the delayed polling of the fan
337 * state. We do check /sysfs-originating settings here in acerhdf_check_param()
338 * as late as the polling interval is since we can't do that in the respective
339 * accessors of the module parameters.
340 */
341static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal,
342 unsigned long *t)
343{
344 int temp, err = 0;
345
346 acerhdf_check_param(thermal);
347
348 err = acerhdf_get_temp(&temp);
349 if (err)
350 return err;
351
352 if (verbose)
353 pr_notice("temp %d\n", temp);
354
355 *t = temp;
356 return 0;
357}
358
359static int acerhdf_bind(struct thermal_zone_device *thermal,
360 struct thermal_cooling_device *cdev)
361{
362 /* if the cooling device is the one from acerhdf bind it */
363 if (cdev != cl_dev)
364 return 0;
365
9d99842f
ZR		 366 if (thermal_zone_bind_cooling_device(thermal, 0, cdev,
367 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT)) {
e86435eb
PF		 368 pr_err("error binding cooling dev\n");
369 return -EINVAL;
370 }
371 return 0;
372}
373
374static int acerhdf_unbind(struct thermal_zone_device *thermal,
375 struct thermal_cooling_device *cdev)
376{
377 if (cdev != cl_dev)
378 return 0;
379
380 if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) {
381 pr_err("error unbinding cooling dev\n");
382 return -EINVAL;
383 }
384 return 0;
385}
386
387static inline void acerhdf_revert_to_bios_mode(void)
388{
389 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
390 kernelmode = 0;
391 if (thz_dev)
392 thz_dev->polling_delay = 0;
393 pr_notice("kernel mode fan control OFF\n");
394}
395static inline void acerhdf_enable_kernelmode(void)
396{
397 kernelmode = 1;
398
399 thz_dev->polling_delay = interval*1000;
400 thermal_zone_device_update(thz_dev);
401 pr_notice("kernel mode fan control ON\n");
402}
403
404static int acerhdf_get_mode(struct thermal_zone_device *thermal,
405 enum thermal_device_mode *mode)
406{
407 if (verbose)
408 pr_notice("kernel mode fan control %d\n", kernelmode);
409
410 *mode = (kernelmode) ? THERMAL_DEVICE_ENABLED
411 : THERMAL_DEVICE_DISABLED;
412
413 return 0;
414}
415
416/*
417 * set operation mode;
418 * enabled: the thermal layer of the kernel takes care about
419 * the temperature and the fan.
420 * disabled: the BIOS takes control of the fan.
421 */
422static int acerhdf_set_mode(struct thermal_zone_device *thermal,
423 enum thermal_device_mode mode)
424{
425 if (mode == THERMAL_DEVICE_DISABLED && kernelmode)
426 acerhdf_revert_to_bios_mode();
427 else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode)
428 acerhdf_enable_kernelmode();
429
430 return 0;
431}
432
433static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip,
434 enum thermal_trip_type *type)
435{
436 if (trip == 0)
437 *type = THERMAL_TRIP_ACTIVE;
438
439 return 0;
440}
441
442static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip,
443 unsigned long *temp)
444{
445 if (trip == 0)
446 *temp = fanon;
447
448 return 0;
449}
450
451static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal,
452 unsigned long *temperature)
453{
454 *temperature = ACERHDF_TEMP_CRIT;
455 return 0;
456}
457
458/* bind callback functions to thermalzone */
fedae5ad 459static struct thermal_zone_device_ops acerhdf_dev_ops = {
e86435eb
PF		 460 .bind = acerhdf_bind,
461 .unbind = acerhdf_unbind,
462 .get_temp = acerhdf_get_ec_temp,
463 .get_mode = acerhdf_get_mode,
464 .set_mode = acerhdf_set_mode,
465 .get_trip_type = acerhdf_get_trip_type,
466 .get_trip_temp = acerhdf_get_trip_temp,
467 .get_crit_temp = acerhdf_get_crit_temp,
468};
469
470
471/*
472 * cooling device callback functions
473 * get maximal fan cooling state
474 */
475static int acerhdf_get_max_state(struct thermal_cooling_device *cdev,
476 unsigned long *state)
477{
478 *state = 1;
479
480 return 0;
481}
482
483static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev,
484 unsigned long *state)
485{
486 int err = 0, tmp;
487
488 err = acerhdf_get_fanstate(&tmp);
489 if (err)
490 return err;
491
492 *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0;
493 return 0;
494}
495
496/* change current fan state - is overwritten when running in kernel mode */
497static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev,
498 unsigned long state)
499{
500 int cur_temp, cur_state, err = 0;
501
502 if (!kernelmode)
503 return 0;
504
505 err = acerhdf_get_temp(&cur_temp);
506 if (err) {
507 pr_err("error reading temperature, hand off control to BIOS\n");
508 goto err_out;
509 }
510
511 err = acerhdf_get_fanstate(&cur_state);
512 if (err) {
513 pr_err("error reading fan state, hand off control to BIOS\n");
514 goto err_out;
515 }
516
517 if (state == 0) {
518 /* turn fan off only if below fanoff temperature */
519 if ((cur_state == ACERHDF_FAN_AUTO) &&
520 (cur_temp < fanoff))
521 acerhdf_change_fanstate(ACERHDF_FAN_OFF);
522 } else {
523 if (cur_state == ACERHDF_FAN_OFF)
524 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
525 }
526 return 0;
527
528err_out:
529 acerhdf_revert_to_bios_mode();
530 return -EINVAL;
531}
532
533/* bind fan callbacks to fan device */
fedae5ad 534static struct thermal_cooling_device_ops acerhdf_cooling_ops = {
e86435eb
PF		 535 .get_max_state = acerhdf_get_max_state,
536 .get_cur_state = acerhdf_get_cur_state,
537 .set_cur_state = acerhdf_set_cur_state,
538};
539
540/* suspend / resume functionality */
ff27e1f3 541static int acerhdf_suspend(struct device *dev)
e86435eb
PF		 542{
543 if (kernelmode)
544 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
545
546 if (verbose)
547 pr_notice("going suspend\n");
548
549 return 0;
550}
551
b859f159 552static int acerhdf_probe(struct platform_device *device)
e86435eb
PF		 553{
554 return 0;
555}
556
557static int acerhdf_remove(struct platform_device *device)
558{
559 return 0;
560}
561
47145210 562static const struct dev_pm_ops acerhdf_pm_ops = {
ff27e1f3
BP		 563 .suspend = acerhdf_suspend,
564 .freeze = acerhdf_suspend,
565};
566
ded0cdfc 567static struct platform_driver acerhdf_driver = {
e86435eb 568 .driver = {
ff27e1f3 569 .name = "acerhdf",
e86435eb 570 .owner = THIS_MODULE,
ff27e1f3 571 .pm = &acerhdf_pm_ops,
e86435eb
PF		 572 },
573 .probe = acerhdf_probe,
574 .remove = acerhdf_remove,
e86435eb
PF		 575};
576
dcbfb815
PF		 577/* checks if str begins with start */
578static int str_starts_with(const char *str, const char *start)
579{
580 unsigned long str_len = 0, start_len = 0;
581
582 str_len = strlen(str);
583 start_len = strlen(start);
584
585 if (str_len >= start_len &&
586 !strncmp(str, start, start_len))
587 return 1;
588
589 return 0;
590}
e86435eb
PF		 591
592/* check hardware */
593static int acerhdf_check_hardware(void)
594{
595 char const *vendor, *version, *product;
dcbfb815 596 const struct bios_settings_t *bt = NULL;
e86435eb
PF		 597
598 /* get BIOS data */
599 vendor = dmi_get_system_info(DMI_SYS_VENDOR);
600 version = dmi_get_system_info(DMI_BIOS_VERSION);
601 product = dmi_get_system_info(DMI_PRODUCT_NAME);
602
5cf4c07a
RC		 603 if (!vendor || !version || !product) {
604 pr_err("error getting hardware information\n");
605 return -EINVAL;
606 }
ded0cdfc 607
e86435eb
PF		 608 pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER);
609
ded0cdfc 610 if (force_bios[0]) {
e86435eb 611 version = force_bios;
ded0cdfc 612 pr_info("forcing BIOS version: %s\n", version);
e86435eb
PF		 613 kernelmode = 0;
614 }
615
ded0cdfc
PF		 616 if (force_product[0]) {
617 product = force_product;
618 pr_info("forcing BIOS product: %s\n", product);
619 kernelmode = 0;
620 }
621
e86435eb
PF		 622 if (verbose)
623 pr_info("BIOS info: %s %s, product: %s\n",
624 vendor, version, product);
625
626 /* search BIOS version and vendor in BIOS settings table */
dcbfb815
PF		 627 for (bt = bios_tbl; bt->vendor[0]; bt++) {
628 /*
629 * check if actual hardware BIOS vendor, product and version
630 * IDs start with the strings of BIOS table entry
631 */
632 if (str_starts_with(vendor, bt->vendor) &&
633 str_starts_with(product, bt->product) &&
634 str_starts_with(version, bt->version)) {
635 bios_cfg = bt;
e86435eb
PF		 636 break;
637 }
638 }
639
640 if (!bios_cfg) {
eecc5bbc
JP		 641 pr_err("unknown (unsupported) BIOS version %s/%s/%s, please report, aborting!\n",
642 vendor, product, version);
e86435eb
PF		 643 return -EINVAL;
644 }
645
646 /*
647 * if started with kernel mode off, prevent the kernel from switching
648 * off the fan
649 */
650 if (!kernelmode) {
651 pr_notice("Fan control off, to enable do:\n");
eecc5bbc 652 pr_notice("echo -n \"enabled\" > /sys/class/thermal/thermal_zone0/mode\n");
e86435eb
PF		 653 }
654
655 return 0;
656}
657
658static int acerhdf_register_platform(void)
659{
660 int err = 0;
661
ded0cdfc 662 err = platform_driver_register(&acerhdf_driver);
e86435eb
PF		 663 if (err)
664 return err;
665
666 acerhdf_dev = platform_device_alloc("acerhdf", -1);
a0dba697
AL		 667 if (!acerhdf_dev) {
668 err = -ENOMEM;
669 goto err_device_alloc;
670 }
671 err = platform_device_add(acerhdf_dev);
672 if (err)
673 goto err_device_add;
e86435eb
PF		 674
675 return 0;
a0dba697
AL		 676
677err_device_add:
678 platform_device_put(acerhdf_dev);
679err_device_alloc:
680 platform_driver_unregister(&acerhdf_driver);
681 return err;
e86435eb
PF		 682}
683
684static void acerhdf_unregister_platform(void)
685{
a0dba697 686 platform_device_unregister(acerhdf_dev);
ded0cdfc 687 platform_driver_unregister(&acerhdf_driver);
e86435eb
PF		 688}
689
690static int acerhdf_register_thermal(void)
691{
692 cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL,
693 &acerhdf_cooling_ops);
694
695 if (IS_ERR(cl_dev))
696 return -EINVAL;
697
c56f5c03 698 thz_dev = thermal_zone_device_register("acerhdf", 1, 0, NULL,
50125a9b 699 &acerhdf_dev_ops, NULL, 0,
e86435eb
PF		 700 (kernelmode) ? interval*1000 : 0);
701 if (IS_ERR(thz_dev))
702 return -EINVAL;
703
704 return 0;
705}
706
707static void acerhdf_unregister_thermal(void)
708{
709 if (cl_dev) {
710 thermal_cooling_device_unregister(cl_dev);
711 cl_dev = NULL;
712 }
713
714 if (thz_dev) {
715 thermal_zone_device_unregister(thz_dev);
716 thz_dev = NULL;
717 }
718}
719
720static int __init acerhdf_init(void)
721{
722 int err = 0;
723
724 err = acerhdf_check_hardware();
725 if (err)
726 goto out_err;
727
728 err = acerhdf_register_platform();
729 if (err)
a0dba697 730 goto out_err;
e86435eb
PF		 731
732 err = acerhdf_register_thermal();
733 if (err)
734 goto err_unreg;
735
736 return 0;
737
738err_unreg:
739 acerhdf_unregister_thermal();
740 acerhdf_unregister_platform();
741
742out_err:
a0dba697 743 return err;
e86435eb
PF		 744}
745
746static void __exit acerhdf_exit(void)
747{
748 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
749 acerhdf_unregister_thermal();
750 acerhdf_unregister_platform();
751}
752
753MODULE_LICENSE("GPL");
754MODULE_AUTHOR("Peter Feuerer");
755MODULE_DESCRIPTION("Aspire One temperature and fan driver");
bdc731bc 756MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:");
43ae1e32 757MODULE_ALIAS("dmi:*:*Acer*:pnAO751h*:");
2c3422d9
AB		 758MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1410*:");
759MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1810*:");
7438d990 760MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5755G:");
43ae1e32 761MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1825PTZ:");
7438d990 762MODULE_ALIAS("dmi:*:*Acer*:pnAO521*:");
24964639 763MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:");
7438d990
PF		 764MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5739G:");
765MODULE_ALIAS("dmi:*:*Acer*:pnAspire*One*753:");
766MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5315:");
43ae1e32 767MODULE_ALIAS("dmi:*:*Acer*:TravelMate*7730G:");
7438d990 768MODULE_ALIAS("dmi:*:*Acer*:TM8573T:");
bdc731bc 769MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:");
94219d79 770MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:");
2c3422d9
AB		 771MODULE_ALIAS("dmi:*:*Packard*Bell*:pnAOA*:");
772MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOA*:");
773MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMU*:");
43ae1e32 774MODULE_ALIAS("dmi:*:*Packard*Bell*:pnENBFT*:");
2c3422d9 775MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMA*:");
43ae1e32 776MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTVR46*:");
7438d990 777MODULE_ALIAS("dmi:*:*Acer*:pnExtensa 5420*:");
e86435eb
PF		 778
779module_init(acerhdf_init);
780module_exit(acerhdf_exit);
Linux kernel - Deliverables
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