1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * acerhdf - A driver which monitors the temperature
4 * of the aspire one netbook, turns on/off the fan
5 * as soon as the upper/lower threshold is reached.
7 * (C) 2009 - Peter Kaestle peter (a) piie.net
9 * 2009 Borislav Petkov bp (a) alien8.de
11 * Inspired by and many thanks to:
12 * o acerfand - Rachel Greenham
13 * o acer_ec.pl - Michael Kurz michi.kurz (at) googlemail.com
14 * - Petr Tomasek tomasek (#) etf,cuni,cz
15 * - Carlos Corbacho cathectic (at) gmail.com
16 * o lkml - Matthew Garrett
21 #define pr_fmt(fmt) "acerhdf: " fmt
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/dmi.h>
26 #include <linux/acpi.h>
27 #include <linux/thermal.h>
28 #include <linux/platform_device.h>
31 * The driver is started with "kernel mode off" by default. That means, the BIOS
32 * is still in control of the fan. In this mode the driver allows to read the
33 * temperature of the cpu and a userspace tool may take over control of the fan.
34 * If the driver is switched to "kernel mode" (e.g. via module parameter) the
35 * driver is in full control of the fan. If you want the module to be started in
36 * kernel mode by default, define the following:
38 #undef START_IN_KERNEL_MODE
40 #define DRV_VER "0.7.0"
43 * According to the Atom N270 datasheet,
44 * (http://download.intel.com/design/processor/datashts/320032.pdf) the
45 * CPU's optimal operating limits denoted in junction temperature as
46 * measured by the on-die thermal monitor are within 0 <= Tj <= 90. So,
47 * assume 89°C is critical temperature.
49 #define ACERHDF_DEFAULT_TEMP_FANON 60000
50 #define ACERHDF_DEFAULT_TEMP_FANOFF 53000
51 #define ACERHDF_TEMP_CRIT 89000
52 #define ACERHDF_FAN_OFF 0
53 #define ACERHDF_FAN_AUTO 1
56 * No matter what value the user puts into the fanon variable, turn on the fan
57 * at 80 degree Celsius to prevent hardware damage
59 #define ACERHDF_MAX_FANON 80000
62 * Maximum interval between two temperature checks is 15 seconds, as the die
63 * can get hot really fast under heavy load (plus we shouldn't forget about
64 * possible impact of _external_ aggressive sources such as heaters, sun etc.)
66 #define ACERHDF_MAX_INTERVAL 15
68 #ifdef START_IN_KERNEL_MODE
69 static int kernelmode = 1;
71 static int kernelmode;
74 static unsigned int interval = 10;
75 static unsigned int fanon = ACERHDF_DEFAULT_TEMP_FANON;
76 static unsigned int fanoff = ACERHDF_DEFAULT_TEMP_FANOFF;
77 static unsigned int verbose;
78 static unsigned int list_supported;
79 static unsigned int fanstate = ACERHDF_FAN_AUTO;
80 static char force_bios[16];
81 static char force_product[16];
82 static unsigned int prev_interval;
83 static struct thermal_zone_device *thz_dev;
84 static struct thermal_cooling_device *cl_dev;
85 static struct platform_device *acerhdf_dev;
87 module_param(kernelmode, uint, 0);
88 MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off");
89 module_param(fanon, uint, 0600);
90 MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature");
91 module_param(fanoff, uint, 0600);
92 MODULE_PARM_DESC(fanoff, "Turn the fan off below this temperature");
93 module_param(verbose, uint, 0600);
94 MODULE_PARM_DESC(verbose, "Enable verbose dmesg output");
95 module_param(list_supported, uint, 0600);
96 MODULE_PARM_DESC(list_supported, "List supported models and BIOS versions");
97 module_param_string(force_bios, force_bios, 16, 0);
98 MODULE_PARM_DESC(force_bios, "Pretend system has this known supported BIOS version");
99 module_param_string(force_product, force_product, 16, 0);
100 MODULE_PARM_DESC(force_product, "Pretend system is this known supported model");
103 * cmd_off: to switch the fan completely off and check if the fan is off
104 * cmd_auto: to set the BIOS in control of the fan. The BIOS regulates then
105 * the fan speed depending on the temperature
117 /* default register and command to disable fan in manual mode */
118 static const struct manualcmd mcmd = {
123 /* BIOS settings - only used during probe */
124 struct bios_settings {
134 /* This could be a daughter struct in the above, but not worth the redirect */
135 struct ctrl_settings {
142 static struct thermal_trip trips[] = {
143 [0] = { .temperature = ACERHDF_DEFAULT_TEMP_FANON,
144 .hysteresis = ACERHDF_DEFAULT_TEMP_FANON - ACERHDF_DEFAULT_TEMP_FANOFF,
145 .type = THERMAL_TRIP_ACTIVE },
147 [1] = { .temperature = ACERHDF_TEMP_CRIT,
148 .type = THERMAL_TRIP_CRITICAL }
151 static struct ctrl_settings ctrl_cfg __read_mostly;
153 /* Register addresses and values for different BIOS versions */
154 static const struct bios_settings bios_tbl[] __initconst = {
156 {"Acer", "AOA110", "v0.3109", 0x55, 0x58, {0x1f, 0x00}, 0},
157 {"Acer", "AOA110", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0},
158 {"Acer", "AOA110", "v0.3301", 0x55, 0x58, {0xaf, 0x00}, 0},
159 {"Acer", "AOA110", "v0.3304", 0x55, 0x58, {0xaf, 0x00}, 0},
160 {"Acer", "AOA110", "v0.3305", 0x55, 0x58, {0xaf, 0x00}, 0},
161 {"Acer", "AOA110", "v0.3307", 0x55, 0x58, {0xaf, 0x00}, 0},
162 {"Acer", "AOA110", "v0.3308", 0x55, 0x58, {0x21, 0x00}, 0},
163 {"Acer", "AOA110", "v0.3309", 0x55, 0x58, {0x21, 0x00}, 0},
164 {"Acer", "AOA110", "v0.3310", 0x55, 0x58, {0x21, 0x00}, 0},
166 {"Acer", "AOA150", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0},
167 {"Acer", "AOA150", "v0.3301", 0x55, 0x58, {0x20, 0x00}, 0},
168 {"Acer", "AOA150", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0},
169 {"Acer", "AOA150", "v0.3305", 0x55, 0x58, {0x20, 0x00}, 0},
170 {"Acer", "AOA150", "v0.3307", 0x55, 0x58, {0x20, 0x00}, 0},
171 {"Acer", "AOA150", "v0.3308", 0x55, 0x58, {0x20, 0x00}, 0},
172 {"Acer", "AOA150", "v0.3309", 0x55, 0x58, {0x20, 0x00}, 0},
173 {"Acer", "AOA150", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0},
175 {"Acer", "LT-10Q", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0},
177 {"Acer", "Aspire 1410", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},
178 {"Acer", "Aspire 1410", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},
179 {"Acer", "Aspire 1410", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},
180 {"Acer", "Aspire 1410", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},
181 {"Acer", "Aspire 1410", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},
182 {"Acer", "Aspire 1410", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},
183 {"Acer", "Aspire 1410", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},
184 {"Acer", "Aspire 1410", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},
185 {"Acer", "Aspire 1410", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},
186 {"Acer", "Aspire 1410", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0},
187 {"Acer", "Aspire 1410", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0},
189 {"Acer", "Aspire 1810TZ", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},
190 {"Acer", "Aspire 1810T", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},
191 {"Acer", "Aspire 1810TZ", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},
192 {"Acer", "Aspire 1810T", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},
193 {"Acer", "Aspire 1810TZ", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},
194 {"Acer", "Aspire 1810T", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},
195 {"Acer", "Aspire 1810TZ", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},
196 {"Acer", "Aspire 1810T", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},
197 {"Acer", "Aspire 1810TZ", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},
198 {"Acer", "Aspire 1810T", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},
199 {"Acer", "Aspire 1810TZ", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},
200 {"Acer", "Aspire 1810T", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},
201 {"Acer", "Aspire 1810TZ", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},
202 {"Acer", "Aspire 1810T", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},
203 {"Acer", "Aspire 1810TZ", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},
204 {"Acer", "Aspire 1810T", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},
205 {"Acer", "Aspire 1810TZ", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},
206 {"Acer", "Aspire 1810T", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},
207 {"Acer", "Aspire 1810TZ", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0},
208 {"Acer", "Aspire 1810T", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0},
209 {"Acer", "Aspire 1810TZ", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0},
210 {"Acer", "Aspire 1810T", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0},
212 {"Acer", "Aspire 5755G", "V1.20", 0xab, 0xb4, {0x00, 0x08}, 0},
213 {"Acer", "Aspire 5755G", "V1.21", 0xab, 0xb3, {0x00, 0x08}, 0},
215 {"Acer", "AO521", "V1.11", 0x55, 0x58, {0x1f, 0x00}, 0},
217 {"Acer", "AO531h", "v0.3104", 0x55, 0x58, {0x20, 0x00}, 0},
218 {"Acer", "AO531h", "v0.3201", 0x55, 0x58, {0x20, 0x00}, 0},
219 {"Acer", "AO531h", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0},
221 {"Acer", "AO751h", "V0.3206", 0x55, 0x58, {0x21, 0x00}, 0},
222 {"Acer", "AO751h", "V0.3212", 0x55, 0x58, {0x21, 0x00}, 0},
224 {"Acer", "Aspire One 753", "V1.24", 0x93, 0xac, {0x14, 0x04}, 1},
226 {"Acer", "Aspire 1825PTZ", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0},
227 {"Acer", "Aspire 1825PTZ", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0},
228 /* Acer Extensa 5420 */
229 {"Acer", "Extensa 5420", "V1.17", 0x93, 0xac, {0x14, 0x04}, 1},
230 /* Acer Aspire 5315 */
231 {"Acer", "Aspire 5315", "V1.19", 0x93, 0xac, {0x14, 0x04}, 1},
232 /* Acer Aspire 5739 */
233 {"Acer", "Aspire 5739G", "V1.3311", 0x55, 0x58, {0x20, 0x00}, 0},
234 /* Acer TravelMate 7730 */
235 {"Acer", "TravelMate 7730G", "v0.3509", 0x55, 0x58, {0xaf, 0x00}, 0},
236 /* Acer Aspire 7551 */
237 {"Acer", "Aspire 7551", "V1.18", 0x93, 0xa8, {0x14, 0x04}, 1},
238 /* Acer TravelMate TM8573T */
239 {"Acer", "TM8573T", "V1.13", 0x93, 0xa8, {0x14, 0x04}, 1},
241 {"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x00}, 0},
242 {"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x00}, 0},
243 {"Gateway", "LT31", "v1.3103", 0x55, 0x58, {0x9e, 0x00}, 0},
244 {"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0},
245 {"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0},
246 {"Gateway", "LT31", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0},
247 {"Gateway", "LT31", "v1.3307", 0x55, 0x58, {0x9e, 0x00}, 0},
249 {"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00}, 0},
250 {"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0},
251 {"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x00}, 0},
252 {"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0},
253 {"Packard Bell", "ENBFT", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0},
254 {"Packard Bell", "ENBFT", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0},
255 {"Packard Bell", "DOTMU", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0},
256 {"Packard Bell", "DOTMU", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0},
257 {"Packard Bell", "DOTMU", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0},
258 {"Packard Bell", "DOTMU", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0},
259 {"Packard Bell", "DOTMU", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0},
260 {"Packard Bell", "DOTMU", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0},
261 {"Packard Bell", "DOTMU", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0},
262 {"Packard Bell", "DOTMU", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0},
263 {"Packard Bell", "DOTMA", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0},
264 {"Packard Bell", "DOTMA", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0},
265 {"Packard Bell", "DOTMA", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0},
266 {"Packard Bell", "DOTVR46", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0},
267 /* pewpew-terminator */
268 {"", "", "", 0, 0, {0, 0}, 0}
272 * this struct is used to instruct thermal layer to use bang_bang instead of
273 * default governor for acerhdf
275 static struct thermal_zone_params acerhdf_zone_params = {
276 .governor_name = "bang_bang",
279 static int acerhdf_get_temp(int *temp)
283 if (ec_read(ctrl_cfg.tempreg, &read_temp))
286 *temp = read_temp * 1000;
291 static int acerhdf_get_fanstate(int *state)
295 if (ec_read(ctrl_cfg.fanreg, &fan))
298 if (fan != ctrl_cfg.cmd.cmd_off)
299 *state = ACERHDF_FAN_AUTO;
301 *state = ACERHDF_FAN_OFF;
306 static void acerhdf_change_fanstate(int state)
311 pr_notice("fan %s\n", state == ACERHDF_FAN_OFF ? "OFF" : "ON");
313 if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) {
314 pr_err("invalid fan state %d requested, setting to auto!\n",
316 state = ACERHDF_FAN_AUTO;
319 cmd = (state == ACERHDF_FAN_OFF) ? ctrl_cfg.cmd.cmd_off
320 : ctrl_cfg.cmd.cmd_auto;
323 ec_write(ctrl_cfg.fanreg, cmd);
325 if (ctrl_cfg.mcmd_enable && state == ACERHDF_FAN_OFF) {
327 pr_notice("turning off fan manually\n");
328 ec_write(mcmd.mreg, mcmd.moff);
332 static void acerhdf_check_param(struct thermal_zone_device *thermal)
334 if (fanon > ACERHDF_MAX_FANON) {
335 pr_err("fanon temperature too high, set to %d\n",
337 fanon = ACERHDF_MAX_FANON;
340 if (fanon < fanoff) {
341 pr_err("fanoff temperature (%d) is above fanon temperature (%d), clamping to %d\n",
342 fanoff, fanon, fanon);
346 trips[0].temperature = fanon;
347 trips[0].hysteresis = fanon - fanoff;
349 if (kernelmode && prev_interval != interval) {
350 if (interval > ACERHDF_MAX_INTERVAL) {
351 pr_err("interval too high, set to %d\n",
352 ACERHDF_MAX_INTERVAL);
353 interval = ACERHDF_MAX_INTERVAL;
356 pr_notice("interval changed to: %d\n", interval);
359 thermal->polling_delay_jiffies =
360 round_jiffies(msecs_to_jiffies(interval * 1000));
362 prev_interval = interval;
367 * This is the thermal zone callback which does the delayed polling of the fan
368 * state. We do check /sysfs-originating settings here in acerhdf_check_param()
369 * as late as the polling interval is since we can't do that in the respective
370 * accessors of the module parameters.
372 static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal, int *t)
376 err = acerhdf_get_temp(&temp);
381 pr_notice("temp %d\n", temp);
387 static int acerhdf_bind(struct thermal_zone_device *thermal,
388 struct thermal_cooling_device *cdev)
390 /* if the cooling device is the one from acerhdf bind it */
394 if (thermal_zone_bind_cooling_device(thermal, 0, cdev,
395 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT,
396 THERMAL_WEIGHT_DEFAULT)) {
397 pr_err("error binding cooling dev\n");
403 static int acerhdf_unbind(struct thermal_zone_device *thermal,
404 struct thermal_cooling_device *cdev)
409 if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) {
410 pr_err("error unbinding cooling dev\n");
416 static inline void acerhdf_revert_to_bios_mode(void)
418 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
421 pr_notice("kernel mode fan control OFF\n");
423 static inline void acerhdf_enable_kernelmode(void)
427 pr_notice("kernel mode fan control ON\n");
431 * set operation mode;
432 * enabled: the thermal layer of the kernel takes care about
433 * the temperature and the fan.
434 * disabled: the BIOS takes control of the fan.
436 static int acerhdf_change_mode(struct thermal_zone_device *thermal,
437 enum thermal_device_mode mode)
439 if (mode == THERMAL_DEVICE_DISABLED && kernelmode)
440 acerhdf_revert_to_bios_mode();
441 else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode)
442 acerhdf_enable_kernelmode();
447 static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal,
450 *temperature = ACERHDF_TEMP_CRIT;
454 /* bind callback functions to thermalzone */
455 static struct thermal_zone_device_ops acerhdf_dev_ops = {
456 .bind = acerhdf_bind,
457 .unbind = acerhdf_unbind,
458 .get_temp = acerhdf_get_ec_temp,
459 .change_mode = acerhdf_change_mode,
460 .get_crit_temp = acerhdf_get_crit_temp,
464 * cooling device callback functions
465 * get maximal fan cooling state
467 static int acerhdf_get_max_state(struct thermal_cooling_device *cdev,
468 unsigned long *state)
475 static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev,
476 unsigned long *state)
480 err = acerhdf_get_fanstate(&tmp);
484 *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0;
488 /* change current fan state - is overwritten when running in kernel mode */
489 static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev,
492 int cur_temp, cur_state, err = 0;
497 err = acerhdf_get_temp(&cur_temp);
499 pr_err("error reading temperature, hand off control to BIOS\n");
503 err = acerhdf_get_fanstate(&cur_state);
505 pr_err("error reading fan state, hand off control to BIOS\n");
510 if (cur_state == ACERHDF_FAN_AUTO)
511 acerhdf_change_fanstate(ACERHDF_FAN_OFF);
513 if (cur_state == ACERHDF_FAN_OFF)
514 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
519 acerhdf_revert_to_bios_mode();
523 /* bind fan callbacks to fan device */
524 static const struct thermal_cooling_device_ops acerhdf_cooling_ops = {
525 .get_max_state = acerhdf_get_max_state,
526 .get_cur_state = acerhdf_get_cur_state,
527 .set_cur_state = acerhdf_set_cur_state,
530 /* suspend / resume functionality */
531 static int acerhdf_suspend(struct device *dev)
534 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
537 pr_notice("going suspend\n");
542 static int acerhdf_probe(struct platform_device *device)
547 static const struct dev_pm_ops acerhdf_pm_ops = {
548 .suspend = acerhdf_suspend,
549 .freeze = acerhdf_suspend,
552 static struct platform_driver acerhdf_driver = {
555 .pm = &acerhdf_pm_ops,
557 .probe = acerhdf_probe,
561 static int __init acerhdf_check_hardware(void)
563 char const *vendor, *version, *product;
564 const struct bios_settings *bt = NULL;
568 vendor = dmi_get_system_info(DMI_SYS_VENDOR);
569 version = dmi_get_system_info(DMI_BIOS_VERSION);
570 product = dmi_get_system_info(DMI_PRODUCT_NAME);
572 if (!vendor || !version || !product) {
573 pr_err("error getting hardware information\n");
577 pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER);
579 if (list_supported) {
580 pr_info("List of supported Manufacturer/Model/BIOS:\n");
581 pr_info("---------------------------------------------------\n");
582 for (bt = bios_tbl; bt->vendor[0]; bt++) {
583 pr_info("%-13s | %-17s | %-10s\n", bt->vendor,
584 bt->product, bt->version);
586 pr_info("---------------------------------------------------\n");
591 version = force_bios;
592 pr_info("forcing BIOS version: %s\n", version);
596 if (force_product[0]) {
597 product = force_product;
598 pr_info("forcing BIOS product: %s\n", product);
603 pr_info("BIOS info: %s %s, product: %s\n",
604 vendor, version, product);
606 /* search BIOS version and vendor in BIOS settings table */
607 for (bt = bios_tbl; bt->vendor[0]; bt++) {
609 * check if actual hardware BIOS vendor, product and version
610 * IDs start with the strings of BIOS table entry
612 if (strstarts(vendor, bt->vendor) &&
613 strstarts(product, bt->product) &&
614 strstarts(version, bt->version)) {
621 pr_err("unknown (unsupported) BIOS version %s/%s/%s, please report, aborting!\n",
622 vendor, product, version);
626 /* Copy control settings from BIOS table before we free it. */
627 ctrl_cfg.fanreg = bt->fanreg;
628 ctrl_cfg.tempreg = bt->tempreg;
629 memcpy(&ctrl_cfg.cmd, &bt->cmd, sizeof(struct fancmd));
630 ctrl_cfg.mcmd_enable = bt->mcmd_enable;
633 * if started with kernel mode off, prevent the kernel from switching
637 pr_notice("Fan control off, to enable do:\n");
638 pr_notice("echo -n \"enabled\" > /sys/class/thermal/thermal_zoneN/mode # N=0,1,2...\n");
644 static int __init acerhdf_register_platform(void)
648 err = platform_driver_register(&acerhdf_driver);
652 acerhdf_dev = platform_device_alloc("acerhdf", PLATFORM_DEVID_NONE);
655 goto err_device_alloc;
657 err = platform_device_add(acerhdf_dev);
664 platform_device_put(acerhdf_dev);
666 platform_driver_unregister(&acerhdf_driver);
670 static void acerhdf_unregister_platform(void)
672 platform_device_unregister(acerhdf_dev);
673 platform_driver_unregister(&acerhdf_driver);
676 static int __init acerhdf_register_thermal(void)
680 cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL,
681 &acerhdf_cooling_ops);
686 thz_dev = thermal_zone_device_register_with_trips("acerhdf", trips, ARRAY_SIZE(trips),
687 0, NULL, &acerhdf_dev_ops,
688 &acerhdf_zone_params, 0,
689 (kernelmode) ? interval*1000 : 0);
694 ret = thermal_zone_device_enable(thz_dev);
696 ret = thermal_zone_device_disable(thz_dev);
700 if (strcmp(thz_dev->governor->name,
701 acerhdf_zone_params.governor_name)) {
702 pr_err("Didn't get thermal governor %s, perhaps not compiled into thermal subsystem.\n",
703 acerhdf_zone_params.governor_name);
710 static void acerhdf_unregister_thermal(void)
713 thermal_cooling_device_unregister(cl_dev);
718 thermal_zone_device_unregister(thz_dev);
723 static int __init acerhdf_init(void)
727 err = acerhdf_check_hardware();
731 err = acerhdf_register_platform();
735 err = acerhdf_register_thermal();
742 acerhdf_unregister_thermal();
743 acerhdf_unregister_platform();
749 static void __exit acerhdf_exit(void)
751 acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
752 acerhdf_unregister_thermal();
753 acerhdf_unregister_platform();
756 MODULE_LICENSE("GPL");
757 MODULE_AUTHOR("Peter Kaestle");
758 MODULE_DESCRIPTION("Aspire One temperature and fan driver");
759 MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:");
760 MODULE_ALIAS("dmi:*:*Acer*:pnAO751h*:");
761 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1410*:");
762 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1810*:");
763 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5755G:");
764 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1825PTZ:");
765 MODULE_ALIAS("dmi:*:*Acer*:pnAO521*:");
766 MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:");
767 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5739G:");
768 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*One*753:");
769 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5315:");
770 MODULE_ALIAS("dmi:*:*Acer*:TravelMate*7730G:");
771 MODULE_ALIAS("dmi:*:*Acer*:pnAspire*7551:");
772 MODULE_ALIAS("dmi:*:*Acer*:TM8573T:");
773 MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:");
774 MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:");
775 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnAOA*:");
776 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOA*:");
777 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMU*:");
778 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnENBFT*:");
779 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMA*:");
780 MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTVR46*:");
781 MODULE_ALIAS("dmi:*:*Acer*:pnExtensa*5420*:");
783 module_init(acerhdf_init);
784 module_exit(acerhdf_exit);
786 static int interval_set_uint(const char *val, const struct kernel_param *kp)
790 ret = param_set_uint(val, kp);
794 acerhdf_check_param(thz_dev);
799 static const struct kernel_param_ops interval_ops = {
800 .set = interval_set_uint,
801 .get = param_get_uint,
804 module_param_cb(interval, &interval_ops, &interval, 0600);
805 MODULE_PARM_DESC(interval, "Polling interval of temperature check");