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> |
| 38 | #include <linux/fs.h> |
| 39 | #include <linux/dmi.h> |
| 40 | #include <acpi/acpi_drivers.h> |
| 41 | #include <linux/sched.h> |
| 42 | #include <linux/thermal.h> |
| 43 | #include <linux/platform_device.h> |
| 44 | |
| 45 | /* |
| 46 | * The driver is started with "kernel mode off" by default. That means, the BIOS |
| 47 | * is still in control of the fan. In this mode the driver allows to read the |
| 48 | * temperature of the cpu and a userspace tool may take over control of the fan. |
| 49 | * If the driver is switched to "kernel mode" (e.g. via module parameter) the |
| 50 | * driver is in full control of the fan. If you want the module to be started in |
| 51 | * kernel mode by default, define the following: |
| 52 | */ |
| 53 | #undef START_IN_KERNEL_MODE |
| 54 | |
Peter Feuerer | 94219d7 | 2009-12-21 16:20:05 -0800 | [diff] [blame^] | 55 | #define DRV_VER "0.5.21" |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 56 | |
| 57 | /* |
| 58 | * According to the Atom N270 datasheet, |
| 59 | * (http://download.intel.com/design/processor/datashts/320032.pdf) the |
| 60 | * CPU's optimal operating limits denoted in junction temperature as |
| 61 | * measured by the on-die thermal monitor are within 0 <= Tj <= 90. So, |
| 62 | * assume 89°C is critical temperature. |
| 63 | */ |
Peter Feuerer | 7005291 | 2009-11-17 14:07:21 -0800 | [diff] [blame] | 64 | #define ACERHDF_TEMP_CRIT 89000 |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 65 | #define ACERHDF_FAN_OFF 0 |
| 66 | #define ACERHDF_FAN_AUTO 1 |
| 67 | |
| 68 | /* |
| 69 | * No matter what value the user puts into the fanon variable, turn on the fan |
| 70 | * at 80 degree Celsius to prevent hardware damage |
| 71 | */ |
Peter Feuerer | 7005291 | 2009-11-17 14:07:21 -0800 | [diff] [blame] | 72 | #define ACERHDF_MAX_FANON 80000 |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 73 | |
| 74 | /* |
| 75 | * Maximum interval between two temperature checks is 15 seconds, as the die |
| 76 | * can get hot really fast under heavy load (plus we shouldn't forget about |
| 77 | * possible impact of _external_ aggressive sources such as heaters, sun etc.) |
| 78 | */ |
| 79 | #define ACERHDF_MAX_INTERVAL 15 |
| 80 | |
| 81 | #ifdef START_IN_KERNEL_MODE |
| 82 | static int kernelmode = 1; |
| 83 | #else |
| 84 | static int kernelmode; |
| 85 | #endif |
| 86 | |
| 87 | static unsigned int interval = 10; |
Peter Feuerer | 7005291 | 2009-11-17 14:07:21 -0800 | [diff] [blame] | 88 | static unsigned int fanon = 63000; |
| 89 | static unsigned int fanoff = 58000; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 90 | static unsigned int verbose; |
| 91 | static unsigned int fanstate = ACERHDF_FAN_AUTO; |
| 92 | static char force_bios[16]; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 93 | static char force_product[16]; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 94 | static unsigned int prev_interval; |
| 95 | struct thermal_zone_device *thz_dev; |
| 96 | struct thermal_cooling_device *cl_dev; |
| 97 | struct platform_device *acerhdf_dev; |
| 98 | |
| 99 | module_param(kernelmode, uint, 0); |
| 100 | MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off"); |
| 101 | module_param(interval, uint, 0600); |
| 102 | MODULE_PARM_DESC(interval, "Polling interval of temperature check"); |
| 103 | module_param(fanon, uint, 0600); |
| 104 | MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature"); |
| 105 | module_param(fanoff, uint, 0600); |
| 106 | MODULE_PARM_DESC(fanoff, "Turn the fan off below this temperature"); |
| 107 | module_param(verbose, uint, 0600); |
| 108 | MODULE_PARM_DESC(verbose, "Enable verbose dmesg output"); |
| 109 | module_param_string(force_bios, force_bios, 16, 0); |
| 110 | MODULE_PARM_DESC(force_bios, "Force BIOS version and omit BIOS check"); |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 111 | module_param_string(force_product, force_product, 16, 0); |
| 112 | MODULE_PARM_DESC(force_product, "Force BIOS product and omit BIOS check"); |
| 113 | |
| 114 | /* |
Peter Feuerer | 3606574 | 2009-11-17 14:27:37 -0800 | [diff] [blame] | 115 | * cmd_off: to switch the fan completely off |
| 116 | * chk_off: to check if the fan is off |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 117 | * cmd_auto: to set the BIOS in control of the fan. The BIOS regulates then |
| 118 | * the fan speed depending on the temperature |
| 119 | */ |
| 120 | struct fancmd { |
| 121 | u8 cmd_off; |
Peter Feuerer | 3606574 | 2009-11-17 14:27:37 -0800 | [diff] [blame] | 122 | u8 chk_off; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 123 | u8 cmd_auto; |
| 124 | }; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 125 | |
| 126 | /* BIOS settings */ |
| 127 | struct bios_settings_t { |
| 128 | const char *vendor; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 129 | const char *product; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 130 | const char *version; |
| 131 | unsigned char fanreg; |
| 132 | unsigned char tempreg; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 133 | struct fancmd cmd; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 134 | }; |
| 135 | |
| 136 | /* Register addresses and values for different BIOS versions */ |
| 137 | static const struct bios_settings_t bios_tbl[] = { |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 138 | /* AOA110 */ |
Peter Feuerer | 3606574 | 2009-11-17 14:27:37 -0800 | [diff] [blame] | 139 | {"Acer", "AOA110", "v0.3109", 0x55, 0x58, {0x1f, 0x1f, 0x00} }, |
| 140 | {"Acer", "AOA110", "v0.3114", 0x55, 0x58, {0x1f, 0x1f, 0x00} }, |
| 141 | {"Acer", "AOA110", "v0.3301", 0x55, 0x58, {0xaf, 0xaf, 0x00} }, |
| 142 | {"Acer", "AOA110", "v0.3304", 0x55, 0x58, {0xaf, 0xaf, 0x00} }, |
| 143 | {"Acer", "AOA110", "v0.3305", 0x55, 0x58, {0xaf, 0xaf, 0x00} }, |
| 144 | {"Acer", "AOA110", "v0.3307", 0x55, 0x58, {0xaf, 0xaf, 0x00} }, |
| 145 | {"Acer", "AOA110", "v0.3308", 0x55, 0x58, {0x21, 0x21, 0x00} }, |
| 146 | {"Acer", "AOA110", "v0.3309", 0x55, 0x58, {0x21, 0x21, 0x00} }, |
| 147 | {"Acer", "AOA110", "v0.3310", 0x55, 0x58, {0x21, 0x21, 0x00} }, |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 148 | /* AOA150 */ |
Peter Feuerer | 3606574 | 2009-11-17 14:27:37 -0800 | [diff] [blame] | 149 | {"Acer", "AOA150", "v0.3114", 0x55, 0x58, {0x20, 0x20, 0x00} }, |
| 150 | {"Acer", "AOA150", "v0.3301", 0x55, 0x58, {0x20, 0x20, 0x00} }, |
| 151 | {"Acer", "AOA150", "v0.3304", 0x55, 0x58, {0x20, 0x20, 0x00} }, |
| 152 | {"Acer", "AOA150", "v0.3305", 0x55, 0x58, {0x20, 0x20, 0x00} }, |
| 153 | {"Acer", "AOA150", "v0.3307", 0x55, 0x58, {0x20, 0x20, 0x00} }, |
| 154 | {"Acer", "AOA150", "v0.3308", 0x55, 0x58, {0x20, 0x20, 0x00} }, |
| 155 | {"Acer", "AOA150", "v0.3309", 0x55, 0x58, {0x20, 0x20, 0x00} }, |
| 156 | {"Acer", "AOA150", "v0.3310", 0x55, 0x58, {0x20, 0x20, 0x00} }, |
| 157 | /* Acer 1410 */ |
| 158 | {"Acer", "Aspire 1410", "v0.3120", 0x55, 0x58, {0x9e, 0x9e, 0x00} }, |
Peter Feuerer | 94219d7 | 2009-12-21 16:20:05 -0800 | [diff] [blame^] | 159 | {"Acer", "Aspire 1410", "v1.3303", 0x55, 0x58, {0x9e, 0x9e, 0x00} }, |
| 160 | /* Acer 1810xx */ |
| 161 | {"Acer", "Aspire 1810TZ", "v0.3120", 0x55, 0x58, {0x9e, 0x9e, 0x00} }, |
| 162 | {"Acer", "Aspire 1810T", "v0.3120", 0x55, 0x58, {0x9e, 0x9e, 0x00} }, |
| 163 | {"Acer", "Aspire 1810T", "v1.3303", 0x55, 0x58, {0x9e, 0x9e, 0x00} }, |
| 164 | {"Acer", "Aspire 1810TZ", "v1.3303", 0x55, 0x58, {0x9e, 0x9e, 0x00} }, |
| 165 | /* Gateway */ |
Peter Feuerer | 3606574 | 2009-11-17 14:27:37 -0800 | [diff] [blame] | 166 | {"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x21, 0x00} }, |
| 167 | {"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x20, 0x00} }, |
| 168 | {"Gateway ", "LT31 ", "v1.3103 ", 0x55, 0x58, |
| 169 | {0x10, 0x0f, 0x00} }, |
| 170 | {"Gateway ", "LT31 ", "v1.3201 ", 0x55, 0x58, |
| 171 | {0x10, 0x0f, 0x00} }, |
| 172 | {"Gateway ", "LT31 ", "v1.3302 ", 0x55, 0x58, |
| 173 | {0x10, 0x0f, 0x00} }, |
Peter Feuerer | 94219d7 | 2009-12-21 16:20:05 -0800 | [diff] [blame^] | 174 | /* Packard Bell */ |
Peter Feuerer | 3606574 | 2009-11-17 14:27:37 -0800 | [diff] [blame] | 175 | {"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x21, 0x00} }, |
| 176 | {"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x20, 0x00} }, |
| 177 | {"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x21, 0x00} }, |
| 178 | {"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x20, 0x00} }, |
Peter Feuerer | 94219d7 | 2009-12-21 16:20:05 -0800 | [diff] [blame^] | 179 | {"Packard Bell", "DOTMU", "v1.3303", 0x55, 0x58, {0x9e, 0x9e, 0x00} }, |
| 180 | {"Packard Bell", "DOTMU", "v0.3120", 0x55, 0x58, {0x9e, 0x9e, 0x00} }, |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 181 | /* pewpew-terminator */ |
Peter Feuerer | 3606574 | 2009-11-17 14:27:37 -0800 | [diff] [blame] | 182 | {"", "", "", 0, 0, {0, 0, 0} } |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 183 | }; |
| 184 | |
| 185 | static const struct bios_settings_t *bios_cfg __read_mostly; |
| 186 | |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 187 | static int acerhdf_get_temp(int *temp) |
| 188 | { |
| 189 | u8 read_temp; |
| 190 | |
| 191 | if (ec_read(bios_cfg->tempreg, &read_temp)) |
| 192 | return -EINVAL; |
| 193 | |
Peter Feuerer | 7005291 | 2009-11-17 14:07:21 -0800 | [diff] [blame] | 194 | *temp = read_temp * 1000; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 195 | |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | static int acerhdf_get_fanstate(int *state) |
| 200 | { |
| 201 | u8 fan; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 202 | |
| 203 | if (ec_read(bios_cfg->fanreg, &fan)) |
| 204 | return -EINVAL; |
| 205 | |
Peter Feuerer | 3606574 | 2009-11-17 14:27:37 -0800 | [diff] [blame] | 206 | if (fan != bios_cfg->cmd.chk_off) |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 207 | *state = ACERHDF_FAN_AUTO; |
| 208 | else |
| 209 | *state = ACERHDF_FAN_OFF; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 210 | |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | static void acerhdf_change_fanstate(int state) |
| 215 | { |
| 216 | unsigned char cmd; |
| 217 | |
| 218 | if (verbose) |
| 219 | pr_notice("fan %s\n", (state == ACERHDF_FAN_OFF) ? |
| 220 | "OFF" : "ON"); |
| 221 | |
| 222 | if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) { |
| 223 | pr_err("invalid fan state %d requested, setting to auto!\n", |
| 224 | state); |
| 225 | state = ACERHDF_FAN_AUTO; |
| 226 | } |
| 227 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 228 | cmd = (state == ACERHDF_FAN_OFF) ? bios_cfg->cmd.cmd_off |
| 229 | : bios_cfg->cmd.cmd_auto; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 230 | fanstate = state; |
| 231 | |
| 232 | ec_write(bios_cfg->fanreg, cmd); |
| 233 | } |
| 234 | |
| 235 | static void acerhdf_check_param(struct thermal_zone_device *thermal) |
| 236 | { |
| 237 | if (fanon > ACERHDF_MAX_FANON) { |
| 238 | pr_err("fanon temperature too high, set to %d\n", |
| 239 | ACERHDF_MAX_FANON); |
| 240 | fanon = ACERHDF_MAX_FANON; |
| 241 | } |
| 242 | |
| 243 | if (kernelmode && prev_interval != interval) { |
| 244 | if (interval > ACERHDF_MAX_INTERVAL) { |
| 245 | pr_err("interval too high, set to %d\n", |
| 246 | ACERHDF_MAX_INTERVAL); |
| 247 | interval = ACERHDF_MAX_INTERVAL; |
| 248 | } |
| 249 | if (verbose) |
| 250 | pr_notice("interval changed to: %d\n", |
| 251 | interval); |
| 252 | thermal->polling_delay = interval*1000; |
| 253 | prev_interval = interval; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | /* |
| 258 | * This is the thermal zone callback which does the delayed polling of the fan |
| 259 | * state. We do check /sysfs-originating settings here in acerhdf_check_param() |
| 260 | * as late as the polling interval is since we can't do that in the respective |
| 261 | * accessors of the module parameters. |
| 262 | */ |
| 263 | static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal, |
| 264 | unsigned long *t) |
| 265 | { |
| 266 | int temp, err = 0; |
| 267 | |
| 268 | acerhdf_check_param(thermal); |
| 269 | |
| 270 | err = acerhdf_get_temp(&temp); |
| 271 | if (err) |
| 272 | return err; |
| 273 | |
| 274 | if (verbose) |
| 275 | pr_notice("temp %d\n", temp); |
| 276 | |
| 277 | *t = temp; |
| 278 | return 0; |
| 279 | } |
| 280 | |
| 281 | static int acerhdf_bind(struct thermal_zone_device *thermal, |
| 282 | struct thermal_cooling_device *cdev) |
| 283 | { |
| 284 | /* if the cooling device is the one from acerhdf bind it */ |
| 285 | if (cdev != cl_dev) |
| 286 | return 0; |
| 287 | |
| 288 | if (thermal_zone_bind_cooling_device(thermal, 0, cdev)) { |
| 289 | pr_err("error binding cooling dev\n"); |
| 290 | return -EINVAL; |
| 291 | } |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | static int acerhdf_unbind(struct thermal_zone_device *thermal, |
| 296 | struct thermal_cooling_device *cdev) |
| 297 | { |
| 298 | if (cdev != cl_dev) |
| 299 | return 0; |
| 300 | |
| 301 | if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) { |
| 302 | pr_err("error unbinding cooling dev\n"); |
| 303 | return -EINVAL; |
| 304 | } |
| 305 | return 0; |
| 306 | } |
| 307 | |
| 308 | static inline void acerhdf_revert_to_bios_mode(void) |
| 309 | { |
| 310 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); |
| 311 | kernelmode = 0; |
| 312 | if (thz_dev) |
| 313 | thz_dev->polling_delay = 0; |
| 314 | pr_notice("kernel mode fan control OFF\n"); |
| 315 | } |
| 316 | static inline void acerhdf_enable_kernelmode(void) |
| 317 | { |
| 318 | kernelmode = 1; |
| 319 | |
| 320 | thz_dev->polling_delay = interval*1000; |
| 321 | thermal_zone_device_update(thz_dev); |
| 322 | pr_notice("kernel mode fan control ON\n"); |
| 323 | } |
| 324 | |
| 325 | static int acerhdf_get_mode(struct thermal_zone_device *thermal, |
| 326 | enum thermal_device_mode *mode) |
| 327 | { |
| 328 | if (verbose) |
| 329 | pr_notice("kernel mode fan control %d\n", kernelmode); |
| 330 | |
| 331 | *mode = (kernelmode) ? THERMAL_DEVICE_ENABLED |
| 332 | : THERMAL_DEVICE_DISABLED; |
| 333 | |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | /* |
| 338 | * set operation mode; |
| 339 | * enabled: the thermal layer of the kernel takes care about |
| 340 | * the temperature and the fan. |
| 341 | * disabled: the BIOS takes control of the fan. |
| 342 | */ |
| 343 | static int acerhdf_set_mode(struct thermal_zone_device *thermal, |
| 344 | enum thermal_device_mode mode) |
| 345 | { |
| 346 | if (mode == THERMAL_DEVICE_DISABLED && kernelmode) |
| 347 | acerhdf_revert_to_bios_mode(); |
| 348 | else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode) |
| 349 | acerhdf_enable_kernelmode(); |
| 350 | |
| 351 | return 0; |
| 352 | } |
| 353 | |
| 354 | static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip, |
| 355 | enum thermal_trip_type *type) |
| 356 | { |
| 357 | if (trip == 0) |
| 358 | *type = THERMAL_TRIP_ACTIVE; |
| 359 | |
| 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip, |
| 364 | unsigned long *temp) |
| 365 | { |
| 366 | if (trip == 0) |
| 367 | *temp = fanon; |
| 368 | |
| 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal, |
| 373 | unsigned long *temperature) |
| 374 | { |
| 375 | *temperature = ACERHDF_TEMP_CRIT; |
| 376 | return 0; |
| 377 | } |
| 378 | |
| 379 | /* bind callback functions to thermalzone */ |
| 380 | struct thermal_zone_device_ops acerhdf_dev_ops = { |
| 381 | .bind = acerhdf_bind, |
| 382 | .unbind = acerhdf_unbind, |
| 383 | .get_temp = acerhdf_get_ec_temp, |
| 384 | .get_mode = acerhdf_get_mode, |
| 385 | .set_mode = acerhdf_set_mode, |
| 386 | .get_trip_type = acerhdf_get_trip_type, |
| 387 | .get_trip_temp = acerhdf_get_trip_temp, |
| 388 | .get_crit_temp = acerhdf_get_crit_temp, |
| 389 | }; |
| 390 | |
| 391 | |
| 392 | /* |
| 393 | * cooling device callback functions |
| 394 | * get maximal fan cooling state |
| 395 | */ |
| 396 | static int acerhdf_get_max_state(struct thermal_cooling_device *cdev, |
| 397 | unsigned long *state) |
| 398 | { |
| 399 | *state = 1; |
| 400 | |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev, |
| 405 | unsigned long *state) |
| 406 | { |
| 407 | int err = 0, tmp; |
| 408 | |
| 409 | err = acerhdf_get_fanstate(&tmp); |
| 410 | if (err) |
| 411 | return err; |
| 412 | |
| 413 | *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0; |
| 414 | return 0; |
| 415 | } |
| 416 | |
| 417 | /* change current fan state - is overwritten when running in kernel mode */ |
| 418 | static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev, |
| 419 | unsigned long state) |
| 420 | { |
| 421 | int cur_temp, cur_state, err = 0; |
| 422 | |
| 423 | if (!kernelmode) |
| 424 | return 0; |
| 425 | |
| 426 | err = acerhdf_get_temp(&cur_temp); |
| 427 | if (err) { |
| 428 | pr_err("error reading temperature, hand off control to BIOS\n"); |
| 429 | goto err_out; |
| 430 | } |
| 431 | |
| 432 | err = acerhdf_get_fanstate(&cur_state); |
| 433 | if (err) { |
| 434 | pr_err("error reading fan state, hand off control to BIOS\n"); |
| 435 | goto err_out; |
| 436 | } |
| 437 | |
| 438 | if (state == 0) { |
| 439 | /* turn fan off only if below fanoff temperature */ |
| 440 | if ((cur_state == ACERHDF_FAN_AUTO) && |
| 441 | (cur_temp < fanoff)) |
| 442 | acerhdf_change_fanstate(ACERHDF_FAN_OFF); |
| 443 | } else { |
| 444 | if (cur_state == ACERHDF_FAN_OFF) |
| 445 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); |
| 446 | } |
| 447 | return 0; |
| 448 | |
| 449 | err_out: |
| 450 | acerhdf_revert_to_bios_mode(); |
| 451 | return -EINVAL; |
| 452 | } |
| 453 | |
| 454 | /* bind fan callbacks to fan device */ |
| 455 | struct thermal_cooling_device_ops acerhdf_cooling_ops = { |
| 456 | .get_max_state = acerhdf_get_max_state, |
| 457 | .get_cur_state = acerhdf_get_cur_state, |
| 458 | .set_cur_state = acerhdf_set_cur_state, |
| 459 | }; |
| 460 | |
| 461 | /* suspend / resume functionality */ |
Borislav Petkov | ff27e1f | 2009-09-18 12:41:05 -0700 | [diff] [blame] | 462 | static int acerhdf_suspend(struct device *dev) |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 463 | { |
| 464 | if (kernelmode) |
| 465 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); |
| 466 | |
| 467 | if (verbose) |
| 468 | pr_notice("going suspend\n"); |
| 469 | |
| 470 | return 0; |
| 471 | } |
| 472 | |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 473 | static int __devinit acerhdf_probe(struct platform_device *device) |
| 474 | { |
| 475 | return 0; |
| 476 | } |
| 477 | |
| 478 | static int acerhdf_remove(struct platform_device *device) |
| 479 | { |
| 480 | return 0; |
| 481 | } |
| 482 | |
Alexey Dobriyan | 4714521 | 2009-12-14 18:00:08 -0800 | [diff] [blame] | 483 | static const struct dev_pm_ops acerhdf_pm_ops = { |
Borislav Petkov | ff27e1f | 2009-09-18 12:41:05 -0700 | [diff] [blame] | 484 | .suspend = acerhdf_suspend, |
| 485 | .freeze = acerhdf_suspend, |
| 486 | }; |
| 487 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 488 | static struct platform_driver acerhdf_driver = { |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 489 | .driver = { |
Borislav Petkov | ff27e1f | 2009-09-18 12:41:05 -0700 | [diff] [blame] | 490 | .name = "acerhdf", |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 491 | .owner = THIS_MODULE, |
Borislav Petkov | ff27e1f | 2009-09-18 12:41:05 -0700 | [diff] [blame] | 492 | .pm = &acerhdf_pm_ops, |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 493 | }, |
| 494 | .probe = acerhdf_probe, |
| 495 | .remove = acerhdf_remove, |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 496 | }; |
| 497 | |
| 498 | |
| 499 | /* check hardware */ |
| 500 | static int acerhdf_check_hardware(void) |
| 501 | { |
| 502 | char const *vendor, *version, *product; |
| 503 | int i; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 504 | unsigned long prod_len = 0; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 505 | |
| 506 | /* get BIOS data */ |
| 507 | vendor = dmi_get_system_info(DMI_SYS_VENDOR); |
| 508 | version = dmi_get_system_info(DMI_BIOS_VERSION); |
| 509 | product = dmi_get_system_info(DMI_PRODUCT_NAME); |
| 510 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 511 | |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 512 | pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER); |
| 513 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 514 | if (force_bios[0]) { |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 515 | version = force_bios; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 516 | pr_info("forcing BIOS version: %s\n", version); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 517 | kernelmode = 0; |
| 518 | } |
| 519 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 520 | if (force_product[0]) { |
| 521 | product = force_product; |
| 522 | pr_info("forcing BIOS product: %s\n", product); |
| 523 | kernelmode = 0; |
| 524 | } |
| 525 | |
| 526 | prod_len = strlen(product); |
| 527 | |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 528 | if (verbose) |
| 529 | pr_info("BIOS info: %s %s, product: %s\n", |
| 530 | vendor, version, product); |
| 531 | |
| 532 | /* search BIOS version and vendor in BIOS settings table */ |
| 533 | for (i = 0; bios_tbl[i].version[0]; i++) { |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 534 | if (strlen(bios_tbl[i].product) >= prod_len && |
| 535 | !strncmp(bios_tbl[i].product, product, |
| 536 | strlen(bios_tbl[i].product)) && |
| 537 | !strcmp(bios_tbl[i].vendor, vendor) && |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 538 | !strcmp(bios_tbl[i].version, version)) { |
| 539 | bios_cfg = &bios_tbl[i]; |
| 540 | break; |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | if (!bios_cfg) { |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 545 | pr_err("unknown (unsupported) BIOS version %s/%s/%s, " |
| 546 | "please report, aborting!\n", vendor, product, version); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 547 | return -EINVAL; |
| 548 | } |
| 549 | |
| 550 | /* |
| 551 | * if started with kernel mode off, prevent the kernel from switching |
| 552 | * off the fan |
| 553 | */ |
| 554 | if (!kernelmode) { |
| 555 | pr_notice("Fan control off, to enable do:\n"); |
| 556 | pr_notice("echo -n \"enabled\" > " |
| 557 | "/sys/class/thermal/thermal_zone0/mode\n"); |
| 558 | } |
| 559 | |
| 560 | return 0; |
| 561 | } |
| 562 | |
| 563 | static int acerhdf_register_platform(void) |
| 564 | { |
| 565 | int err = 0; |
| 566 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 567 | err = platform_driver_register(&acerhdf_driver); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 568 | if (err) |
| 569 | return err; |
| 570 | |
| 571 | acerhdf_dev = platform_device_alloc("acerhdf", -1); |
| 572 | platform_device_add(acerhdf_dev); |
| 573 | |
| 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | static void acerhdf_unregister_platform(void) |
| 578 | { |
| 579 | if (!acerhdf_dev) |
| 580 | return; |
| 581 | |
| 582 | platform_device_del(acerhdf_dev); |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 583 | platform_driver_unregister(&acerhdf_driver); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | static int acerhdf_register_thermal(void) |
| 587 | { |
| 588 | cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL, |
| 589 | &acerhdf_cooling_ops); |
| 590 | |
| 591 | if (IS_ERR(cl_dev)) |
| 592 | return -EINVAL; |
| 593 | |
| 594 | thz_dev = thermal_zone_device_register("acerhdf", 1, NULL, |
| 595 | &acerhdf_dev_ops, 0, 0, 0, |
| 596 | (kernelmode) ? interval*1000 : 0); |
| 597 | if (IS_ERR(thz_dev)) |
| 598 | return -EINVAL; |
| 599 | |
| 600 | return 0; |
| 601 | } |
| 602 | |
| 603 | static void acerhdf_unregister_thermal(void) |
| 604 | { |
| 605 | if (cl_dev) { |
| 606 | thermal_cooling_device_unregister(cl_dev); |
| 607 | cl_dev = NULL; |
| 608 | } |
| 609 | |
| 610 | if (thz_dev) { |
| 611 | thermal_zone_device_unregister(thz_dev); |
| 612 | thz_dev = NULL; |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | static int __init acerhdf_init(void) |
| 617 | { |
| 618 | int err = 0; |
| 619 | |
| 620 | err = acerhdf_check_hardware(); |
| 621 | if (err) |
| 622 | goto out_err; |
| 623 | |
| 624 | err = acerhdf_register_platform(); |
| 625 | if (err) |
| 626 | goto err_unreg; |
| 627 | |
| 628 | err = acerhdf_register_thermal(); |
| 629 | if (err) |
| 630 | goto err_unreg; |
| 631 | |
| 632 | return 0; |
| 633 | |
| 634 | err_unreg: |
| 635 | acerhdf_unregister_thermal(); |
| 636 | acerhdf_unregister_platform(); |
| 637 | |
| 638 | out_err: |
| 639 | return -ENODEV; |
| 640 | } |
| 641 | |
| 642 | static void __exit acerhdf_exit(void) |
| 643 | { |
| 644 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); |
| 645 | acerhdf_unregister_thermal(); |
| 646 | acerhdf_unregister_platform(); |
| 647 | } |
| 648 | |
| 649 | MODULE_LICENSE("GPL"); |
| 650 | MODULE_AUTHOR("Peter Feuerer"); |
| 651 | MODULE_DESCRIPTION("Aspire One temperature and fan driver"); |
Stefan Bader | bdc731b | 2009-12-21 16:20:04 -0800 | [diff] [blame] | 652 | MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:"); |
Peter Feuerer | 94219d7 | 2009-12-21 16:20:05 -0800 | [diff] [blame^] | 653 | MODULE_ALIAS("dmi:*:*Acer*:pnAspire 1410*:"); |
| 654 | MODULE_ALIAS("dmi:*:*Acer*:pnAspire 1810*:"); |
Stefan Bader | bdc731b | 2009-12-21 16:20:04 -0800 | [diff] [blame] | 655 | MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:"); |
Peter Feuerer | 94219d7 | 2009-12-21 16:20:05 -0800 | [diff] [blame^] | 656 | MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:"); |
Stefan Bader | bdc731b | 2009-12-21 16:20:04 -0800 | [diff] [blame] | 657 | MODULE_ALIAS("dmi:*:*Packard Bell*:pnAOA*:"); |
| 658 | MODULE_ALIAS("dmi:*:*Packard Bell*:pnDOA*:"); |
Peter Feuerer | 94219d7 | 2009-12-21 16:20:05 -0800 | [diff] [blame^] | 659 | MODULE_ALIAS("dmi:*:*Packard Bell*:pnDOTMU*:"); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 660 | |
| 661 | module_init(acerhdf_init); |
| 662 | module_exit(acerhdf_exit); |