Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 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 |
| 8 | * 2009 Borislav Petkov <petkovbb@gmail.com> |
| 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> |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 38 | #include <linux/dmi.h> |
Jean Delvare | c4bae98 | 2011-04-24 18:07:55 +0200 | [diff] [blame] | 39 | #include <linux/acpi.h> |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 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 | |
Peter Feuerer | 2496463 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 53 | #define DRV_VER "0.5.24" |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 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 | */ |
Peter Feuerer | 7005291 | 2009-11-17 14:07:21 -0800 | [diff] [blame] | 62 | #define ACERHDF_TEMP_CRIT 89000 |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 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 | */ |
Peter Feuerer | 7005291 | 2009-11-17 14:07:21 -0800 | [diff] [blame] | 70 | #define ACERHDF_MAX_FANON 80000 |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 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; |
Peter Feuerer | 7005291 | 2009-11-17 14:07:21 -0800 | [diff] [blame] | 86 | static unsigned int fanon = 63000; |
| 87 | static unsigned int fanoff = 58000; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 88 | static unsigned int verbose; |
| 89 | static unsigned int fanstate = ACERHDF_FAN_AUTO; |
| 90 | static char force_bios[16]; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 91 | static char force_product[16]; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 92 | static unsigned int prev_interval; |
Axel Lin | fedae5a | 2010-07-20 15:19:43 -0700 | [diff] [blame] | 93 | static struct thermal_zone_device *thz_dev; |
| 94 | static struct thermal_cooling_device *cl_dev; |
| 95 | static struct platform_device *acerhdf_dev; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 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"); |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 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 | /* |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 113 | * cmd_off: to switch the fan completely off and check if the fan is off |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 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 | }; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 121 | |
| 122 | /* BIOS settings */ |
| 123 | struct bios_settings_t { |
| 124 | const char *vendor; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 125 | const char *product; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 126 | const char *version; |
| 127 | unsigned char fanreg; |
| 128 | unsigned char tempreg; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 129 | struct fancmd cmd; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 130 | }; |
| 131 | |
| 132 | /* Register addresses and values for different BIOS versions */ |
| 133 | static const struct bios_settings_t bios_tbl[] = { |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 134 | /* AOA110 */ |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 135 | {"Acer", "AOA110", "v0.3109", 0x55, 0x58, {0x1f, 0x00} }, |
| 136 | {"Acer", "AOA110", "v0.3114", 0x55, 0x58, {0x1f, 0x00} }, |
| 137 | {"Acer", "AOA110", "v0.3301", 0x55, 0x58, {0xaf, 0x00} }, |
| 138 | {"Acer", "AOA110", "v0.3304", 0x55, 0x58, {0xaf, 0x00} }, |
| 139 | {"Acer", "AOA110", "v0.3305", 0x55, 0x58, {0xaf, 0x00} }, |
| 140 | {"Acer", "AOA110", "v0.3307", 0x55, 0x58, {0xaf, 0x00} }, |
| 141 | {"Acer", "AOA110", "v0.3308", 0x55, 0x58, {0x21, 0x00} }, |
| 142 | {"Acer", "AOA110", "v0.3309", 0x55, 0x58, {0x21, 0x00} }, |
| 143 | {"Acer", "AOA110", "v0.3310", 0x55, 0x58, {0x21, 0x00} }, |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 144 | /* AOA150 */ |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 145 | {"Acer", "AOA150", "v0.3114", 0x55, 0x58, {0x1f, 0x00} }, |
| 146 | {"Acer", "AOA150", "v0.3301", 0x55, 0x58, {0x20, 0x00} }, |
| 147 | {"Acer", "AOA150", "v0.3304", 0x55, 0x58, {0x20, 0x00} }, |
| 148 | {"Acer", "AOA150", "v0.3305", 0x55, 0x58, {0x20, 0x00} }, |
| 149 | {"Acer", "AOA150", "v0.3307", 0x55, 0x58, {0x20, 0x00} }, |
| 150 | {"Acer", "AOA150", "v0.3308", 0x55, 0x58, {0x20, 0x00} }, |
| 151 | {"Acer", "AOA150", "v0.3309", 0x55, 0x58, {0x20, 0x00} }, |
| 152 | {"Acer", "AOA150", "v0.3310", 0x55, 0x58, {0x20, 0x00} }, |
Peter Feuerer | 3606574 | 2009-11-17 14:27:37 -0800 | [diff] [blame] | 153 | /* Acer 1410 */ |
Peter Feuerer | 2496463 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 154 | {"Acer", "Aspire 1410", "v0.3108", 0x55, 0x58, {0x9e, 0x00} }, |
| 155 | {"Acer", "Aspire 1410", "v0.3113", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 156 | {"Acer", "Aspire 1410", "v0.3115", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 2496463 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 157 | {"Acer", "Aspire 1410", "v0.3117", 0x55, 0x58, {0x9e, 0x00} }, |
| 158 | {"Acer", "Aspire 1410", "v0.3119", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 159 | {"Acer", "Aspire 1410", "v0.3120", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 2496463 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 160 | {"Acer", "Aspire 1410", "v1.3204", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 161 | {"Acer", "Aspire 1410", "v1.3303", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 2496463 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 162 | {"Acer", "Aspire 1410", "v1.3308", 0x55, 0x58, {0x9e, 0x00} }, |
| 163 | {"Acer", "Aspire 1410", "v1.3310", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 94219d7 | 2009-12-21 16:20:05 -0800 | [diff] [blame] | 164 | /* Acer 1810xx */ |
Peter Feuerer | 2496463 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 165 | {"Acer", "Aspire 1810TZ", "v0.3108", 0x55, 0x58, {0x9e, 0x00} }, |
| 166 | {"Acer", "Aspire 1810T", "v0.3108", 0x55, 0x58, {0x9e, 0x00} }, |
| 167 | {"Acer", "Aspire 1810TZ", "v0.3113", 0x55, 0x58, {0x9e, 0x00} }, |
| 168 | {"Acer", "Aspire 1810T", "v0.3113", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 169 | {"Acer", "Aspire 1810TZ", "v0.3115", 0x55, 0x58, {0x9e, 0x00} }, |
| 170 | {"Acer", "Aspire 1810T", "v0.3115", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 2496463 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 171 | {"Acer", "Aspire 1810TZ", "v0.3117", 0x55, 0x58, {0x9e, 0x00} }, |
| 172 | {"Acer", "Aspire 1810T", "v0.3117", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 173 | {"Acer", "Aspire 1810TZ", "v0.3119", 0x55, 0x58, {0x9e, 0x00} }, |
| 174 | {"Acer", "Aspire 1810T", "v0.3119", 0x55, 0x58, {0x9e, 0x00} }, |
| 175 | {"Acer", "Aspire 1810TZ", "v0.3120", 0x55, 0x58, {0x9e, 0x00} }, |
| 176 | {"Acer", "Aspire 1810T", "v0.3120", 0x55, 0x58, {0x9e, 0x00} }, |
| 177 | {"Acer", "Aspire 1810TZ", "v1.3204", 0x55, 0x58, {0x9e, 0x00} }, |
| 178 | {"Acer", "Aspire 1810T", "v1.3204", 0x55, 0x58, {0x9e, 0x00} }, |
| 179 | {"Acer", "Aspire 1810TZ", "v1.3303", 0x55, 0x58, {0x9e, 0x00} }, |
| 180 | {"Acer", "Aspire 1810T", "v1.3303", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 2496463 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 181 | {"Acer", "Aspire 1810TZ", "v1.3308", 0x55, 0x58, {0x9e, 0x00} }, |
| 182 | {"Acer", "Aspire 1810T", "v1.3308", 0x55, 0x58, {0x9e, 0x00} }, |
| 183 | {"Acer", "Aspire 1810TZ", "v1.3310", 0x55, 0x58, {0x9e, 0x00} }, |
| 184 | {"Acer", "Aspire 1810T", "v1.3310", 0x55, 0x58, {0x9e, 0x00} }, |
Julien Valroff | b06862b | 2011-06-24 08:47:17 -0400 | [diff] [blame] | 185 | {"Acer", "Aspire 1810TZ", "v1.3314", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 2496463 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 186 | /* Acer 531 */ |
| 187 | {"Acer", "AO531h", "v0.3201", 0x55, 0x58, {0x20, 0x00} }, |
Peter Feuerer | 94219d7 | 2009-12-21 16:20:05 -0800 | [diff] [blame] | 188 | /* Gateway */ |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 189 | {"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x00} }, |
| 190 | {"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x00} }, |
| 191 | {"Gateway", "LT31", "v1.3103", 0x55, 0x58, {0x9e, 0x00} }, |
| 192 | {"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x9e, 0x00} }, |
| 193 | {"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 94219d7 | 2009-12-21 16:20:05 -0800 | [diff] [blame] | 194 | /* Packard Bell */ |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 195 | {"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00} }, |
| 196 | {"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00} }, |
| 197 | {"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x00} }, |
| 198 | {"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00} }, |
| 199 | {"Packard Bell", "DOTMU", "v1.3303", 0x55, 0x58, {0x9e, 0x00} }, |
| 200 | {"Packard Bell", "DOTMU", "v0.3120", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 2496463 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 201 | {"Packard Bell", "DOTMU", "v0.3108", 0x55, 0x58, {0x9e, 0x00} }, |
| 202 | {"Packard Bell", "DOTMU", "v0.3113", 0x55, 0x58, {0x9e, 0x00} }, |
| 203 | {"Packard Bell", "DOTMU", "v0.3115", 0x55, 0x58, {0x9e, 0x00} }, |
| 204 | {"Packard Bell", "DOTMU", "v0.3117", 0x55, 0x58, {0x9e, 0x00} }, |
| 205 | {"Packard Bell", "DOTMU", "v0.3119", 0x55, 0x58, {0x9e, 0x00} }, |
| 206 | {"Packard Bell", "DOTMU", "v1.3204", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 207 | {"Packard Bell", "DOTMA", "v1.3201", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | 2496463 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 208 | {"Packard Bell", "DOTMA", "v1.3302", 0x55, 0x58, {0x9e, 0x00} }, |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 209 | /* pewpew-terminator */ |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 210 | {"", "", "", 0, 0, {0, 0} } |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 211 | }; |
| 212 | |
| 213 | static const struct bios_settings_t *bios_cfg __read_mostly; |
| 214 | |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 215 | static int acerhdf_get_temp(int *temp) |
| 216 | { |
| 217 | u8 read_temp; |
| 218 | |
| 219 | if (ec_read(bios_cfg->tempreg, &read_temp)) |
| 220 | return -EINVAL; |
| 221 | |
Peter Feuerer | 7005291 | 2009-11-17 14:07:21 -0800 | [diff] [blame] | 222 | *temp = read_temp * 1000; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 223 | |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | static int acerhdf_get_fanstate(int *state) |
| 228 | { |
| 229 | u8 fan; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 230 | |
| 231 | if (ec_read(bios_cfg->fanreg, &fan)) |
| 232 | return -EINVAL; |
| 233 | |
Peter Feuerer | 210183d | 2010-07-20 15:19:32 -0700 | [diff] [blame] | 234 | if (fan != bios_cfg->cmd.cmd_off) |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 235 | *state = ACERHDF_FAN_AUTO; |
| 236 | else |
| 237 | *state = ACERHDF_FAN_OFF; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 238 | |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | static void acerhdf_change_fanstate(int state) |
| 243 | { |
| 244 | unsigned char cmd; |
| 245 | |
| 246 | if (verbose) |
| 247 | pr_notice("fan %s\n", (state == ACERHDF_FAN_OFF) ? |
| 248 | "OFF" : "ON"); |
| 249 | |
| 250 | if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) { |
| 251 | pr_err("invalid fan state %d requested, setting to auto!\n", |
| 252 | state); |
| 253 | state = ACERHDF_FAN_AUTO; |
| 254 | } |
| 255 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 256 | cmd = (state == ACERHDF_FAN_OFF) ? bios_cfg->cmd.cmd_off |
| 257 | : bios_cfg->cmd.cmd_auto; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 258 | fanstate = state; |
| 259 | |
| 260 | ec_write(bios_cfg->fanreg, cmd); |
| 261 | } |
| 262 | |
| 263 | static void acerhdf_check_param(struct thermal_zone_device *thermal) |
| 264 | { |
| 265 | if (fanon > ACERHDF_MAX_FANON) { |
| 266 | pr_err("fanon temperature too high, set to %d\n", |
| 267 | ACERHDF_MAX_FANON); |
| 268 | fanon = ACERHDF_MAX_FANON; |
| 269 | } |
| 270 | |
| 271 | if (kernelmode && prev_interval != interval) { |
| 272 | if (interval > ACERHDF_MAX_INTERVAL) { |
| 273 | pr_err("interval too high, set to %d\n", |
| 274 | ACERHDF_MAX_INTERVAL); |
| 275 | interval = ACERHDF_MAX_INTERVAL; |
| 276 | } |
| 277 | if (verbose) |
| 278 | pr_notice("interval changed to: %d\n", |
| 279 | interval); |
| 280 | thermal->polling_delay = interval*1000; |
| 281 | prev_interval = interval; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * This is the thermal zone callback which does the delayed polling of the fan |
| 287 | * state. We do check /sysfs-originating settings here in acerhdf_check_param() |
| 288 | * as late as the polling interval is since we can't do that in the respective |
| 289 | * accessors of the module parameters. |
| 290 | */ |
| 291 | static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal, |
| 292 | unsigned long *t) |
| 293 | { |
| 294 | int temp, err = 0; |
| 295 | |
| 296 | acerhdf_check_param(thermal); |
| 297 | |
| 298 | err = acerhdf_get_temp(&temp); |
| 299 | if (err) |
| 300 | return err; |
| 301 | |
| 302 | if (verbose) |
| 303 | pr_notice("temp %d\n", temp); |
| 304 | |
| 305 | *t = temp; |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static int acerhdf_bind(struct thermal_zone_device *thermal, |
| 310 | struct thermal_cooling_device *cdev) |
| 311 | { |
| 312 | /* if the cooling device is the one from acerhdf bind it */ |
| 313 | if (cdev != cl_dev) |
| 314 | return 0; |
| 315 | |
| 316 | if (thermal_zone_bind_cooling_device(thermal, 0, cdev)) { |
| 317 | pr_err("error binding cooling dev\n"); |
| 318 | return -EINVAL; |
| 319 | } |
| 320 | return 0; |
| 321 | } |
| 322 | |
| 323 | static int acerhdf_unbind(struct thermal_zone_device *thermal, |
| 324 | struct thermal_cooling_device *cdev) |
| 325 | { |
| 326 | if (cdev != cl_dev) |
| 327 | return 0; |
| 328 | |
| 329 | if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) { |
| 330 | pr_err("error unbinding cooling dev\n"); |
| 331 | return -EINVAL; |
| 332 | } |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | static inline void acerhdf_revert_to_bios_mode(void) |
| 337 | { |
| 338 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); |
| 339 | kernelmode = 0; |
| 340 | if (thz_dev) |
| 341 | thz_dev->polling_delay = 0; |
| 342 | pr_notice("kernel mode fan control OFF\n"); |
| 343 | } |
| 344 | static inline void acerhdf_enable_kernelmode(void) |
| 345 | { |
| 346 | kernelmode = 1; |
| 347 | |
| 348 | thz_dev->polling_delay = interval*1000; |
| 349 | thermal_zone_device_update(thz_dev); |
| 350 | pr_notice("kernel mode fan control ON\n"); |
| 351 | } |
| 352 | |
| 353 | static int acerhdf_get_mode(struct thermal_zone_device *thermal, |
| 354 | enum thermal_device_mode *mode) |
| 355 | { |
| 356 | if (verbose) |
| 357 | pr_notice("kernel mode fan control %d\n", kernelmode); |
| 358 | |
| 359 | *mode = (kernelmode) ? THERMAL_DEVICE_ENABLED |
| 360 | : THERMAL_DEVICE_DISABLED; |
| 361 | |
| 362 | return 0; |
| 363 | } |
| 364 | |
| 365 | /* |
| 366 | * set operation mode; |
| 367 | * enabled: the thermal layer of the kernel takes care about |
| 368 | * the temperature and the fan. |
| 369 | * disabled: the BIOS takes control of the fan. |
| 370 | */ |
| 371 | static int acerhdf_set_mode(struct thermal_zone_device *thermal, |
| 372 | enum thermal_device_mode mode) |
| 373 | { |
| 374 | if (mode == THERMAL_DEVICE_DISABLED && kernelmode) |
| 375 | acerhdf_revert_to_bios_mode(); |
| 376 | else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode) |
| 377 | acerhdf_enable_kernelmode(); |
| 378 | |
| 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip, |
| 383 | enum thermal_trip_type *type) |
| 384 | { |
| 385 | if (trip == 0) |
| 386 | *type = THERMAL_TRIP_ACTIVE; |
| 387 | |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip, |
| 392 | unsigned long *temp) |
| 393 | { |
| 394 | if (trip == 0) |
| 395 | *temp = fanon; |
| 396 | |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal, |
| 401 | unsigned long *temperature) |
| 402 | { |
| 403 | *temperature = ACERHDF_TEMP_CRIT; |
| 404 | return 0; |
| 405 | } |
| 406 | |
| 407 | /* bind callback functions to thermalzone */ |
Axel Lin | fedae5a | 2010-07-20 15:19:43 -0700 | [diff] [blame] | 408 | static struct thermal_zone_device_ops acerhdf_dev_ops = { |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 409 | .bind = acerhdf_bind, |
| 410 | .unbind = acerhdf_unbind, |
| 411 | .get_temp = acerhdf_get_ec_temp, |
| 412 | .get_mode = acerhdf_get_mode, |
| 413 | .set_mode = acerhdf_set_mode, |
| 414 | .get_trip_type = acerhdf_get_trip_type, |
| 415 | .get_trip_temp = acerhdf_get_trip_temp, |
| 416 | .get_crit_temp = acerhdf_get_crit_temp, |
| 417 | }; |
| 418 | |
| 419 | |
| 420 | /* |
| 421 | * cooling device callback functions |
| 422 | * get maximal fan cooling state |
| 423 | */ |
| 424 | static int acerhdf_get_max_state(struct thermal_cooling_device *cdev, |
| 425 | unsigned long *state) |
| 426 | { |
| 427 | *state = 1; |
| 428 | |
| 429 | return 0; |
| 430 | } |
| 431 | |
| 432 | static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev, |
| 433 | unsigned long *state) |
| 434 | { |
| 435 | int err = 0, tmp; |
| 436 | |
| 437 | err = acerhdf_get_fanstate(&tmp); |
| 438 | if (err) |
| 439 | return err; |
| 440 | |
| 441 | *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0; |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | /* change current fan state - is overwritten when running in kernel mode */ |
| 446 | static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev, |
| 447 | unsigned long state) |
| 448 | { |
| 449 | int cur_temp, cur_state, err = 0; |
| 450 | |
| 451 | if (!kernelmode) |
| 452 | return 0; |
| 453 | |
| 454 | err = acerhdf_get_temp(&cur_temp); |
| 455 | if (err) { |
| 456 | pr_err("error reading temperature, hand off control to BIOS\n"); |
| 457 | goto err_out; |
| 458 | } |
| 459 | |
| 460 | err = acerhdf_get_fanstate(&cur_state); |
| 461 | if (err) { |
| 462 | pr_err("error reading fan state, hand off control to BIOS\n"); |
| 463 | goto err_out; |
| 464 | } |
| 465 | |
| 466 | if (state == 0) { |
| 467 | /* turn fan off only if below fanoff temperature */ |
| 468 | if ((cur_state == ACERHDF_FAN_AUTO) && |
| 469 | (cur_temp < fanoff)) |
| 470 | acerhdf_change_fanstate(ACERHDF_FAN_OFF); |
| 471 | } else { |
| 472 | if (cur_state == ACERHDF_FAN_OFF) |
| 473 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); |
| 474 | } |
| 475 | return 0; |
| 476 | |
| 477 | err_out: |
| 478 | acerhdf_revert_to_bios_mode(); |
| 479 | return -EINVAL; |
| 480 | } |
| 481 | |
| 482 | /* bind fan callbacks to fan device */ |
Axel Lin | fedae5a | 2010-07-20 15:19:43 -0700 | [diff] [blame] | 483 | static struct thermal_cooling_device_ops acerhdf_cooling_ops = { |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 484 | .get_max_state = acerhdf_get_max_state, |
| 485 | .get_cur_state = acerhdf_get_cur_state, |
| 486 | .set_cur_state = acerhdf_set_cur_state, |
| 487 | }; |
| 488 | |
| 489 | /* suspend / resume functionality */ |
Borislav Petkov | ff27e1f | 2009-09-18 12:41:05 -0700 | [diff] [blame] | 490 | static int acerhdf_suspend(struct device *dev) |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 491 | { |
| 492 | if (kernelmode) |
| 493 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); |
| 494 | |
| 495 | if (verbose) |
| 496 | pr_notice("going suspend\n"); |
| 497 | |
| 498 | return 0; |
| 499 | } |
| 500 | |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 501 | static int __devinit acerhdf_probe(struct platform_device *device) |
| 502 | { |
| 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | static int acerhdf_remove(struct platform_device *device) |
| 507 | { |
| 508 | return 0; |
| 509 | } |
| 510 | |
Alexey Dobriyan | 4714521 | 2009-12-14 18:00:08 -0800 | [diff] [blame] | 511 | static const struct dev_pm_ops acerhdf_pm_ops = { |
Borislav Petkov | ff27e1f | 2009-09-18 12:41:05 -0700 | [diff] [blame] | 512 | .suspend = acerhdf_suspend, |
| 513 | .freeze = acerhdf_suspend, |
| 514 | }; |
| 515 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 516 | static struct platform_driver acerhdf_driver = { |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 517 | .driver = { |
Borislav Petkov | ff27e1f | 2009-09-18 12:41:05 -0700 | [diff] [blame] | 518 | .name = "acerhdf", |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 519 | .owner = THIS_MODULE, |
Borislav Petkov | ff27e1f | 2009-09-18 12:41:05 -0700 | [diff] [blame] | 520 | .pm = &acerhdf_pm_ops, |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 521 | }, |
| 522 | .probe = acerhdf_probe, |
| 523 | .remove = acerhdf_remove, |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 524 | }; |
| 525 | |
Peter Feuerer | dcbfb81 | 2009-12-21 16:20:06 -0800 | [diff] [blame] | 526 | /* checks if str begins with start */ |
| 527 | static int str_starts_with(const char *str, const char *start) |
| 528 | { |
| 529 | unsigned long str_len = 0, start_len = 0; |
| 530 | |
| 531 | str_len = strlen(str); |
| 532 | start_len = strlen(start); |
| 533 | |
| 534 | if (str_len >= start_len && |
| 535 | !strncmp(str, start, start_len)) |
| 536 | return 1; |
| 537 | |
| 538 | return 0; |
| 539 | } |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 540 | |
| 541 | /* check hardware */ |
| 542 | static int acerhdf_check_hardware(void) |
| 543 | { |
| 544 | char const *vendor, *version, *product; |
Peter Feuerer | dcbfb81 | 2009-12-21 16:20:06 -0800 | [diff] [blame] | 545 | const struct bios_settings_t *bt = NULL; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 546 | |
| 547 | /* get BIOS data */ |
| 548 | vendor = dmi_get_system_info(DMI_SYS_VENDOR); |
| 549 | version = dmi_get_system_info(DMI_BIOS_VERSION); |
| 550 | product = dmi_get_system_info(DMI_PRODUCT_NAME); |
| 551 | |
Rahul Chaturvedi | 5cf4c07 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 552 | if (!vendor || !version || !product) { |
| 553 | pr_err("error getting hardware information\n"); |
| 554 | return -EINVAL; |
| 555 | } |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 556 | |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 557 | pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER); |
| 558 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 559 | if (force_bios[0]) { |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 560 | version = force_bios; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 561 | pr_info("forcing BIOS version: %s\n", version); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 562 | kernelmode = 0; |
| 563 | } |
| 564 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 565 | if (force_product[0]) { |
| 566 | product = force_product; |
| 567 | pr_info("forcing BIOS product: %s\n", product); |
| 568 | kernelmode = 0; |
| 569 | } |
| 570 | |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 571 | if (verbose) |
| 572 | pr_info("BIOS info: %s %s, product: %s\n", |
| 573 | vendor, version, product); |
| 574 | |
| 575 | /* search BIOS version and vendor in BIOS settings table */ |
Peter Feuerer | dcbfb81 | 2009-12-21 16:20:06 -0800 | [diff] [blame] | 576 | for (bt = bios_tbl; bt->vendor[0]; bt++) { |
| 577 | /* |
| 578 | * check if actual hardware BIOS vendor, product and version |
| 579 | * IDs start with the strings of BIOS table entry |
| 580 | */ |
| 581 | if (str_starts_with(vendor, bt->vendor) && |
| 582 | str_starts_with(product, bt->product) && |
| 583 | str_starts_with(version, bt->version)) { |
| 584 | bios_cfg = bt; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 585 | break; |
| 586 | } |
| 587 | } |
| 588 | |
| 589 | if (!bios_cfg) { |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 590 | pr_err("unknown (unsupported) BIOS version %s/%s/%s, " |
| 591 | "please report, aborting!\n", vendor, product, version); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 592 | return -EINVAL; |
| 593 | } |
| 594 | |
| 595 | /* |
| 596 | * if started with kernel mode off, prevent the kernel from switching |
| 597 | * off the fan |
| 598 | */ |
| 599 | if (!kernelmode) { |
| 600 | pr_notice("Fan control off, to enable do:\n"); |
| 601 | pr_notice("echo -n \"enabled\" > " |
| 602 | "/sys/class/thermal/thermal_zone0/mode\n"); |
| 603 | } |
| 604 | |
| 605 | return 0; |
| 606 | } |
| 607 | |
| 608 | static int acerhdf_register_platform(void) |
| 609 | { |
| 610 | int err = 0; |
| 611 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 612 | err = platform_driver_register(&acerhdf_driver); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 613 | if (err) |
| 614 | return err; |
| 615 | |
| 616 | acerhdf_dev = platform_device_alloc("acerhdf", -1); |
Axel Lin | a0dba69 | 2010-07-20 15:19:49 -0700 | [diff] [blame] | 617 | if (!acerhdf_dev) { |
| 618 | err = -ENOMEM; |
| 619 | goto err_device_alloc; |
| 620 | } |
| 621 | err = platform_device_add(acerhdf_dev); |
| 622 | if (err) |
| 623 | goto err_device_add; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 624 | |
| 625 | return 0; |
Axel Lin | a0dba69 | 2010-07-20 15:19:49 -0700 | [diff] [blame] | 626 | |
| 627 | err_device_add: |
| 628 | platform_device_put(acerhdf_dev); |
| 629 | err_device_alloc: |
| 630 | platform_driver_unregister(&acerhdf_driver); |
| 631 | return err; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 632 | } |
| 633 | |
| 634 | static void acerhdf_unregister_platform(void) |
| 635 | { |
Axel Lin | a0dba69 | 2010-07-20 15:19:49 -0700 | [diff] [blame] | 636 | platform_device_unregister(acerhdf_dev); |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 637 | platform_driver_unregister(&acerhdf_driver); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 638 | } |
| 639 | |
| 640 | static int acerhdf_register_thermal(void) |
| 641 | { |
| 642 | cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL, |
| 643 | &acerhdf_cooling_ops); |
| 644 | |
| 645 | if (IS_ERR(cl_dev)) |
| 646 | return -EINVAL; |
| 647 | |
| 648 | thz_dev = thermal_zone_device_register("acerhdf", 1, NULL, |
| 649 | &acerhdf_dev_ops, 0, 0, 0, |
| 650 | (kernelmode) ? interval*1000 : 0); |
| 651 | if (IS_ERR(thz_dev)) |
| 652 | return -EINVAL; |
| 653 | |
| 654 | return 0; |
| 655 | } |
| 656 | |
| 657 | static void acerhdf_unregister_thermal(void) |
| 658 | { |
| 659 | if (cl_dev) { |
| 660 | thermal_cooling_device_unregister(cl_dev); |
| 661 | cl_dev = NULL; |
| 662 | } |
| 663 | |
| 664 | if (thz_dev) { |
| 665 | thermal_zone_device_unregister(thz_dev); |
| 666 | thz_dev = NULL; |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | static int __init acerhdf_init(void) |
| 671 | { |
| 672 | int err = 0; |
| 673 | |
| 674 | err = acerhdf_check_hardware(); |
| 675 | if (err) |
| 676 | goto out_err; |
| 677 | |
| 678 | err = acerhdf_register_platform(); |
| 679 | if (err) |
Axel Lin | a0dba69 | 2010-07-20 15:19:49 -0700 | [diff] [blame] | 680 | goto out_err; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 681 | |
| 682 | err = acerhdf_register_thermal(); |
| 683 | if (err) |
| 684 | goto err_unreg; |
| 685 | |
| 686 | return 0; |
| 687 | |
| 688 | err_unreg: |
| 689 | acerhdf_unregister_thermal(); |
| 690 | acerhdf_unregister_platform(); |
| 691 | |
| 692 | out_err: |
Axel Lin | a0dba69 | 2010-07-20 15:19:49 -0700 | [diff] [blame] | 693 | return err; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | static void __exit acerhdf_exit(void) |
| 697 | { |
| 698 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); |
| 699 | acerhdf_unregister_thermal(); |
| 700 | acerhdf_unregister_platform(); |
| 701 | } |
| 702 | |
| 703 | MODULE_LICENSE("GPL"); |
| 704 | MODULE_AUTHOR("Peter Feuerer"); |
| 705 | MODULE_DESCRIPTION("Aspire One temperature and fan driver"); |
Stefan Bader | bdc731b | 2009-12-21 16:20:04 -0800 | [diff] [blame] | 706 | MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:"); |
Anton V. Boyarshinov | 2c3422d | 2011-07-28 18:05:35 +0400 | [diff] [blame^] | 707 | MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1410*:"); |
| 708 | MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1810*:"); |
Peter Feuerer | 2496463 | 2010-07-20 15:19:33 -0700 | [diff] [blame] | 709 | MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:"); |
Stefan Bader | bdc731b | 2009-12-21 16:20:04 -0800 | [diff] [blame] | 710 | MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:"); |
Peter Feuerer | 94219d7 | 2009-12-21 16:20:05 -0800 | [diff] [blame] | 711 | MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:"); |
Anton V. Boyarshinov | 2c3422d | 2011-07-28 18:05:35 +0400 | [diff] [blame^] | 712 | MODULE_ALIAS("dmi:*:*Packard*Bell*:pnAOA*:"); |
| 713 | MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOA*:"); |
| 714 | MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMU*:"); |
| 715 | MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMA*:"); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 716 | |
| 717 | module_init(acerhdf_init); |
| 718 | module_exit(acerhdf_exit); |