Commit | Line | Data |
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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 | |
80 | static int kernelmode = 1; | |
81 | #else | |
82 | static int kernelmode; | |
83 | #endif | |
84 | ||
85 | static unsigned int interval = 10; | |
351963bb PF |
86 | static unsigned int fanon = 60000; |
87 | static unsigned int fanoff = 53000; | |
e86435eb PF |
88 | static unsigned int verbose; |
89 | static unsigned int fanstate = ACERHDF_FAN_AUTO; | |
90 | static char force_bios[16]; | |
ded0cdfc | 91 | static char force_product[16]; |
e86435eb | 92 | static unsigned int prev_interval; |
fedae5ad AL |
93 | static struct thermal_zone_device *thz_dev; |
94 | static struct thermal_cooling_device *cl_dev; | |
95 | static struct platform_device *acerhdf_dev; | |
e86435eb PF |
96 | |
97 | module_param(kernelmode, uint, 0); | |
98 | MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off"); | |
99 | module_param(interval, uint, 0600); | |
100 | MODULE_PARM_DESC(interval, "Polling interval of temperature check"); | |
101 | module_param(fanon, uint, 0600); | |
102 | MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature"); | |
103 | module_param(fanoff, uint, 0600); | |
104 | MODULE_PARM_DESC(fanoff, "Turn the fan off below this temperature"); | |
105 | module_param(verbose, uint, 0600); | |
106 | MODULE_PARM_DESC(verbose, "Enable verbose dmesg output"); | |
107 | module_param_string(force_bios, force_bios, 16, 0); | |
108 | MODULE_PARM_DESC(force_bios, "Force BIOS version and omit BIOS check"); | |
ded0cdfc PF |
109 | module_param_string(force_product, force_product, 16, 0); |
110 | MODULE_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 | */ | |
117 | struct fancmd { | |
118 | u8 cmd_off; | |
119 | u8 cmd_auto; | |
120 | }; | |
e86435eb | 121 | |
5ef6578c PF |
122 | struct manualcmd { |
123 | u8 mreg; | |
124 | u8 moff; | |
125 | }; | |
126 | ||
127 | /* default register and command to disable fan in manual mode */ | |
128 | static const struct manualcmd mcmd = { | |
129 | .mreg = 0x94, | |
130 | .moff = 0xff, | |
131 | }; | |
132 | ||
e86435eb | 133 | /* BIOS settings */ |
f587f07f | 134 | struct 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 | 145 | static 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 | 259 | static 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 | */ | |
265 | static struct thermal_zone_params acerhdf_zone_params = { | |
266 | .governor_name = "bang_bang", | |
267 | }; | |
e86435eb | 268 | |
e86435eb PF |
269 | static 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 | ||
281 | static 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 | ||
296 | static 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 | ||
322 | static 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 | */ | |
17e8351a | 349 | static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal, int *t) |
e86435eb PF |
350 | { |
351 | int temp, err = 0; | |
352 | ||
353 | acerhdf_check_param(thermal); | |
354 | ||
355 | err = acerhdf_get_temp(&temp); | |
356 | if (err) | |
357 | return err; | |
358 | ||
359 | if (verbose) | |
360 | pr_notice("temp %d\n", temp); | |
361 | ||
362 | *t = temp; | |
363 | return 0; | |
364 | } | |
365 | ||
366 | static int acerhdf_bind(struct thermal_zone_device *thermal, | |
367 | struct thermal_cooling_device *cdev) | |
368 | { | |
369 | /* if the cooling device is the one from acerhdf bind it */ | |
370 | if (cdev != cl_dev) | |
371 | return 0; | |
372 | ||
9d99842f | 373 | if (thermal_zone_bind_cooling_device(thermal, 0, cdev, |
6cd9e9f6 KS |
374 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, |
375 | THERMAL_WEIGHT_DEFAULT)) { | |
e86435eb PF |
376 | pr_err("error binding cooling dev\n"); |
377 | return -EINVAL; | |
378 | } | |
379 | return 0; | |
380 | } | |
381 | ||
382 | static int acerhdf_unbind(struct thermal_zone_device *thermal, | |
383 | struct thermal_cooling_device *cdev) | |
384 | { | |
385 | if (cdev != cl_dev) | |
386 | return 0; | |
387 | ||
388 | if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) { | |
389 | pr_err("error unbinding cooling dev\n"); | |
390 | return -EINVAL; | |
391 | } | |
392 | return 0; | |
393 | } | |
394 | ||
395 | static inline void acerhdf_revert_to_bios_mode(void) | |
396 | { | |
397 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); | |
398 | kernelmode = 0; | |
399 | if (thz_dev) | |
400 | thz_dev->polling_delay = 0; | |
401 | pr_notice("kernel mode fan control OFF\n"); | |
402 | } | |
403 | static inline void acerhdf_enable_kernelmode(void) | |
404 | { | |
405 | kernelmode = 1; | |
406 | ||
407 | thz_dev->polling_delay = interval*1000; | |
408 | thermal_zone_device_update(thz_dev); | |
409 | pr_notice("kernel mode fan control ON\n"); | |
410 | } | |
411 | ||
412 | static int acerhdf_get_mode(struct thermal_zone_device *thermal, | |
413 | enum thermal_device_mode *mode) | |
414 | { | |
415 | if (verbose) | |
416 | pr_notice("kernel mode fan control %d\n", kernelmode); | |
417 | ||
418 | *mode = (kernelmode) ? THERMAL_DEVICE_ENABLED | |
419 | : THERMAL_DEVICE_DISABLED; | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
424 | /* | |
425 | * set operation mode; | |
426 | * enabled: the thermal layer of the kernel takes care about | |
427 | * the temperature and the fan. | |
428 | * disabled: the BIOS takes control of the fan. | |
429 | */ | |
430 | static int acerhdf_set_mode(struct thermal_zone_device *thermal, | |
431 | enum thermal_device_mode mode) | |
432 | { | |
433 | if (mode == THERMAL_DEVICE_DISABLED && kernelmode) | |
434 | acerhdf_revert_to_bios_mode(); | |
435 | else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode) | |
436 | acerhdf_enable_kernelmode(); | |
437 | ||
438 | return 0; | |
439 | } | |
440 | ||
441 | static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip, | |
442 | enum thermal_trip_type *type) | |
443 | { | |
444 | if (trip == 0) | |
445 | *type = THERMAL_TRIP_ACTIVE; | |
7e8b6d73 PF |
446 | else if (trip == 1) |
447 | *type = THERMAL_TRIP_CRITICAL; | |
448 | else | |
449 | return -EINVAL; | |
e86435eb PF |
450 | |
451 | return 0; | |
452 | } | |
453 | ||
48c8dd64 | 454 | static int acerhdf_get_trip_hyst(struct thermal_zone_device *thermal, int trip, |
17e8351a | 455 | int *temp) |
48c8dd64 PF |
456 | { |
457 | if (trip != 0) | |
458 | return -EINVAL; | |
459 | ||
460 | *temp = fanon - fanoff; | |
e86435eb PF |
461 | |
462 | return 0; | |
463 | } | |
464 | ||
465 | static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip, | |
17e8351a | 466 | int *temp) |
e86435eb PF |
467 | { |
468 | if (trip == 0) | |
469 | *temp = fanon; | |
7e8b6d73 PF |
470 | else if (trip == 1) |
471 | *temp = ACERHDF_TEMP_CRIT; | |
472 | else | |
473 | return -EINVAL; | |
e86435eb PF |
474 | |
475 | return 0; | |
476 | } | |
477 | ||
478 | static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal, | |
17e8351a | 479 | int *temperature) |
e86435eb PF |
480 | { |
481 | *temperature = ACERHDF_TEMP_CRIT; | |
482 | return 0; | |
483 | } | |
484 | ||
485 | /* bind callback functions to thermalzone */ | |
fedae5ad | 486 | static struct thermal_zone_device_ops acerhdf_dev_ops = { |
e86435eb PF |
487 | .bind = acerhdf_bind, |
488 | .unbind = acerhdf_unbind, | |
489 | .get_temp = acerhdf_get_ec_temp, | |
490 | .get_mode = acerhdf_get_mode, | |
491 | .set_mode = acerhdf_set_mode, | |
492 | .get_trip_type = acerhdf_get_trip_type, | |
48c8dd64 | 493 | .get_trip_hyst = acerhdf_get_trip_hyst, |
e86435eb PF |
494 | .get_trip_temp = acerhdf_get_trip_temp, |
495 | .get_crit_temp = acerhdf_get_crit_temp, | |
496 | }; | |
497 | ||
498 | ||
499 | /* | |
500 | * cooling device callback functions | |
501 | * get maximal fan cooling state | |
502 | */ | |
503 | static int acerhdf_get_max_state(struct thermal_cooling_device *cdev, | |
504 | unsigned long *state) | |
505 | { | |
506 | *state = 1; | |
507 | ||
508 | return 0; | |
509 | } | |
510 | ||
511 | static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev, | |
512 | unsigned long *state) | |
513 | { | |
514 | int err = 0, tmp; | |
515 | ||
516 | err = acerhdf_get_fanstate(&tmp); | |
517 | if (err) | |
518 | return err; | |
519 | ||
520 | *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0; | |
521 | return 0; | |
522 | } | |
523 | ||
524 | /* change current fan state - is overwritten when running in kernel mode */ | |
525 | static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev, | |
526 | unsigned long state) | |
527 | { | |
528 | int cur_temp, cur_state, err = 0; | |
529 | ||
530 | if (!kernelmode) | |
531 | return 0; | |
532 | ||
533 | err = acerhdf_get_temp(&cur_temp); | |
534 | if (err) { | |
535 | pr_err("error reading temperature, hand off control to BIOS\n"); | |
536 | goto err_out; | |
537 | } | |
538 | ||
539 | err = acerhdf_get_fanstate(&cur_state); | |
540 | if (err) { | |
541 | pr_err("error reading fan state, hand off control to BIOS\n"); | |
542 | goto err_out; | |
543 | } | |
544 | ||
545 | if (state == 0) { | |
48c8dd64 | 546 | if (cur_state == ACERHDF_FAN_AUTO) |
e86435eb PF |
547 | acerhdf_change_fanstate(ACERHDF_FAN_OFF); |
548 | } else { | |
549 | if (cur_state == ACERHDF_FAN_OFF) | |
550 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); | |
551 | } | |
552 | return 0; | |
553 | ||
554 | err_out: | |
555 | acerhdf_revert_to_bios_mode(); | |
556 | return -EINVAL; | |
557 | } | |
558 | ||
559 | /* bind fan callbacks to fan device */ | |
fedae5ad | 560 | static struct thermal_cooling_device_ops acerhdf_cooling_ops = { |
e86435eb PF |
561 | .get_max_state = acerhdf_get_max_state, |
562 | .get_cur_state = acerhdf_get_cur_state, | |
563 | .set_cur_state = acerhdf_set_cur_state, | |
564 | }; | |
565 | ||
566 | /* suspend / resume functionality */ | |
ff27e1f3 | 567 | static int acerhdf_suspend(struct device *dev) |
e86435eb PF |
568 | { |
569 | if (kernelmode) | |
570 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); | |
571 | ||
572 | if (verbose) | |
573 | pr_notice("going suspend\n"); | |
574 | ||
575 | return 0; | |
576 | } | |
577 | ||
b859f159 | 578 | static int acerhdf_probe(struct platform_device *device) |
e86435eb PF |
579 | { |
580 | return 0; | |
581 | } | |
582 | ||
583 | static int acerhdf_remove(struct platform_device *device) | |
584 | { | |
585 | return 0; | |
586 | } | |
587 | ||
47145210 | 588 | static const struct dev_pm_ops acerhdf_pm_ops = { |
ff27e1f3 BP |
589 | .suspend = acerhdf_suspend, |
590 | .freeze = acerhdf_suspend, | |
591 | }; | |
592 | ||
ded0cdfc | 593 | static struct platform_driver acerhdf_driver = { |
e86435eb | 594 | .driver = { |
ff27e1f3 | 595 | .name = "acerhdf", |
ff27e1f3 | 596 | .pm = &acerhdf_pm_ops, |
e86435eb PF |
597 | }, |
598 | .probe = acerhdf_probe, | |
599 | .remove = acerhdf_remove, | |
e86435eb PF |
600 | }; |
601 | ||
dcbfb815 PF |
602 | /* checks if str begins with start */ |
603 | static int str_starts_with(const char *str, const char *start) | |
604 | { | |
605 | unsigned long str_len = 0, start_len = 0; | |
606 | ||
607 | str_len = strlen(str); | |
608 | start_len = strlen(start); | |
609 | ||
610 | if (str_len >= start_len && | |
611 | !strncmp(str, start, start_len)) | |
612 | return 1; | |
613 | ||
614 | return 0; | |
615 | } | |
e86435eb PF |
616 | |
617 | /* check hardware */ | |
618 | static int acerhdf_check_hardware(void) | |
619 | { | |
620 | char const *vendor, *version, *product; | |
f587f07f | 621 | const struct bios_settings *bt = NULL; |
e86435eb PF |
622 | |
623 | /* get BIOS data */ | |
624 | vendor = dmi_get_system_info(DMI_SYS_VENDOR); | |
625 | version = dmi_get_system_info(DMI_BIOS_VERSION); | |
626 | product = dmi_get_system_info(DMI_PRODUCT_NAME); | |
627 | ||
5cf4c07a RC |
628 | if (!vendor || !version || !product) { |
629 | pr_err("error getting hardware information\n"); | |
630 | return -EINVAL; | |
631 | } | |
ded0cdfc | 632 | |
e86435eb PF |
633 | pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER); |
634 | ||
ded0cdfc | 635 | if (force_bios[0]) { |
e86435eb | 636 | version = force_bios; |
ded0cdfc | 637 | pr_info("forcing BIOS version: %s\n", version); |
e86435eb PF |
638 | kernelmode = 0; |
639 | } | |
640 | ||
ded0cdfc PF |
641 | if (force_product[0]) { |
642 | product = force_product; | |
643 | pr_info("forcing BIOS product: %s\n", product); | |
644 | kernelmode = 0; | |
645 | } | |
646 | ||
e86435eb PF |
647 | if (verbose) |
648 | pr_info("BIOS info: %s %s, product: %s\n", | |
649 | vendor, version, product); | |
650 | ||
651 | /* search BIOS version and vendor in BIOS settings table */ | |
dcbfb815 PF |
652 | for (bt = bios_tbl; bt->vendor[0]; bt++) { |
653 | /* | |
654 | * check if actual hardware BIOS vendor, product and version | |
655 | * IDs start with the strings of BIOS table entry | |
656 | */ | |
657 | if (str_starts_with(vendor, bt->vendor) && | |
658 | str_starts_with(product, bt->product) && | |
659 | str_starts_with(version, bt->version)) { | |
660 | bios_cfg = bt; | |
e86435eb PF |
661 | break; |
662 | } | |
663 | } | |
664 | ||
665 | if (!bios_cfg) { | |
eecc5bbc JP |
666 | pr_err("unknown (unsupported) BIOS version %s/%s/%s, please report, aborting!\n", |
667 | vendor, product, version); | |
e86435eb PF |
668 | return -EINVAL; |
669 | } | |
670 | ||
671 | /* | |
672 | * if started with kernel mode off, prevent the kernel from switching | |
673 | * off the fan | |
674 | */ | |
675 | if (!kernelmode) { | |
676 | pr_notice("Fan control off, to enable do:\n"); | |
eecc5bbc | 677 | pr_notice("echo -n \"enabled\" > /sys/class/thermal/thermal_zone0/mode\n"); |
e86435eb PF |
678 | } |
679 | ||
680 | return 0; | |
681 | } | |
682 | ||
683 | static int acerhdf_register_platform(void) | |
684 | { | |
685 | int err = 0; | |
686 | ||
ded0cdfc | 687 | err = platform_driver_register(&acerhdf_driver); |
e86435eb PF |
688 | if (err) |
689 | return err; | |
690 | ||
691 | acerhdf_dev = platform_device_alloc("acerhdf", -1); | |
a0dba697 AL |
692 | if (!acerhdf_dev) { |
693 | err = -ENOMEM; | |
694 | goto err_device_alloc; | |
695 | } | |
696 | err = platform_device_add(acerhdf_dev); | |
697 | if (err) | |
698 | goto err_device_add; | |
e86435eb PF |
699 | |
700 | return 0; | |
a0dba697 AL |
701 | |
702 | err_device_add: | |
703 | platform_device_put(acerhdf_dev); | |
704 | err_device_alloc: | |
705 | platform_driver_unregister(&acerhdf_driver); | |
706 | return err; | |
e86435eb PF |
707 | } |
708 | ||
709 | static void acerhdf_unregister_platform(void) | |
710 | { | |
a0dba697 | 711 | platform_device_unregister(acerhdf_dev); |
ded0cdfc | 712 | platform_driver_unregister(&acerhdf_driver); |
e86435eb PF |
713 | } |
714 | ||
715 | static int acerhdf_register_thermal(void) | |
716 | { | |
717 | cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL, | |
718 | &acerhdf_cooling_ops); | |
719 | ||
720 | if (IS_ERR(cl_dev)) | |
721 | return -EINVAL; | |
722 | ||
7e8b6d73 | 723 | thz_dev = thermal_zone_device_register("acerhdf", 2, 0, NULL, |
48c8dd64 PF |
724 | &acerhdf_dev_ops, |
725 | &acerhdf_zone_params, 0, | |
e86435eb PF |
726 | (kernelmode) ? interval*1000 : 0); |
727 | if (IS_ERR(thz_dev)) | |
728 | return -EINVAL; | |
729 | ||
48c8dd64 PF |
730 | if (strcmp(thz_dev->governor->name, |
731 | acerhdf_zone_params.governor_name)) { | |
732 | pr_err("Didn't get thermal governor %s, perhaps not compiled into thermal subsystem.\n", | |
733 | acerhdf_zone_params.governor_name); | |
734 | return -EINVAL; | |
735 | } | |
736 | ||
e86435eb PF |
737 | return 0; |
738 | } | |
739 | ||
740 | static void acerhdf_unregister_thermal(void) | |
741 | { | |
742 | if (cl_dev) { | |
743 | thermal_cooling_device_unregister(cl_dev); | |
744 | cl_dev = NULL; | |
745 | } | |
746 | ||
747 | if (thz_dev) { | |
748 | thermal_zone_device_unregister(thz_dev); | |
749 | thz_dev = NULL; | |
750 | } | |
751 | } | |
752 | ||
753 | static int __init acerhdf_init(void) | |
754 | { | |
755 | int err = 0; | |
756 | ||
757 | err = acerhdf_check_hardware(); | |
758 | if (err) | |
759 | goto out_err; | |
760 | ||
761 | err = acerhdf_register_platform(); | |
762 | if (err) | |
a0dba697 | 763 | goto out_err; |
e86435eb PF |
764 | |
765 | err = acerhdf_register_thermal(); | |
766 | if (err) | |
767 | goto err_unreg; | |
768 | ||
769 | return 0; | |
770 | ||
771 | err_unreg: | |
772 | acerhdf_unregister_thermal(); | |
773 | acerhdf_unregister_platform(); | |
774 | ||
775 | out_err: | |
a0dba697 | 776 | return err; |
e86435eb PF |
777 | } |
778 | ||
779 | static void __exit acerhdf_exit(void) | |
780 | { | |
781 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); | |
782 | acerhdf_unregister_thermal(); | |
783 | acerhdf_unregister_platform(); | |
784 | } | |
785 | ||
786 | MODULE_LICENSE("GPL"); | |
787 | MODULE_AUTHOR("Peter Feuerer"); | |
788 | MODULE_DESCRIPTION("Aspire One temperature and fan driver"); | |
bdc731bc | 789 | MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:"); |
43ae1e32 | 790 | MODULE_ALIAS("dmi:*:*Acer*:pnAO751h*:"); |
2c3422d9 AB |
791 | MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1410*:"); |
792 | MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1810*:"); | |
7438d990 | 793 | MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5755G:"); |
43ae1e32 | 794 | MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1825PTZ:"); |
7438d990 | 795 | MODULE_ALIAS("dmi:*:*Acer*:pnAO521*:"); |
24964639 | 796 | MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:"); |
7438d990 PF |
797 | MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5739G:"); |
798 | MODULE_ALIAS("dmi:*:*Acer*:pnAspire*One*753:"); | |
799 | MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5315:"); | |
43ae1e32 | 800 | MODULE_ALIAS("dmi:*:*Acer*:TravelMate*7730G:"); |
7438d990 | 801 | MODULE_ALIAS("dmi:*:*Acer*:TM8573T:"); |
bdc731bc | 802 | MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:"); |
94219d79 | 803 | MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:"); |
2c3422d9 AB |
804 | MODULE_ALIAS("dmi:*:*Packard*Bell*:pnAOA*:"); |
805 | MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOA*:"); | |
806 | MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMU*:"); | |
43ae1e32 | 807 | MODULE_ALIAS("dmi:*:*Packard*Bell*:pnENBFT*:"); |
2c3422d9 | 808 | MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMA*:"); |
43ae1e32 | 809 | MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTVR46*:"); |
7438d990 | 810 | MODULE_ALIAS("dmi:*:*Acer*:pnExtensa 5420*:"); |
e86435eb PF |
811 | |
812 | module_init(acerhdf_init); | |
813 | module_exit(acerhdf_exit); |