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 | 7005291 | 2009-11-17 14:07:21 -0800 | [diff] [blame^] | 55 | #define DRV_VER "0.5.18" |
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 | /* |
| 115 | * cmd_off: to switch the fan completely off / to check if the fan is off |
| 116 | * cmd_auto: to set the BIOS in control of the fan. The BIOS regulates then |
| 117 | * the fan speed depending on the temperature |
| 118 | */ |
| 119 | struct fancmd { |
| 120 | u8 cmd_off; |
| 121 | u8 cmd_auto; |
| 122 | }; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 123 | |
| 124 | /* BIOS settings */ |
| 125 | struct bios_settings_t { |
| 126 | const char *vendor; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 127 | const char *product; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 128 | const char *version; |
| 129 | unsigned char fanreg; |
| 130 | unsigned char tempreg; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 131 | struct fancmd cmd; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 132 | }; |
| 133 | |
| 134 | /* Register addresses and values for different BIOS versions */ |
| 135 | static const struct bios_settings_t bios_tbl[] = { |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 136 | /* AOA110 */ |
| 137 | {"Acer", "AOA110", "v0.3109", 0x55, 0x58, {0x1f, 0x00} }, |
| 138 | {"Acer", "AOA110", "v0.3114", 0x55, 0x58, {0x1f, 0x00} }, |
| 139 | {"Acer", "AOA110", "v0.3301", 0x55, 0x58, {0xaf, 0x00} }, |
| 140 | {"Acer", "AOA110", "v0.3304", 0x55, 0x58, {0xaf, 0x00} }, |
| 141 | {"Acer", "AOA110", "v0.3305", 0x55, 0x58, {0xaf, 0x00} }, |
Peter Feuerer | f944915 | 2009-09-18 12:41:07 -0700 | [diff] [blame] | 142 | {"Acer", "AOA110", "v0.3307", 0x55, 0x58, {0xaf, 0x00} }, |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 143 | {"Acer", "AOA110", "v0.3308", 0x55, 0x58, {0x21, 0x00} }, |
| 144 | {"Acer", "AOA110", "v0.3309", 0x55, 0x58, {0x21, 0x00} }, |
| 145 | {"Acer", "AOA110", "v0.3310", 0x55, 0x58, {0x21, 0x00} }, |
| 146 | /* AOA150 */ |
| 147 | {"Acer", "AOA150", "v0.3114", 0x55, 0x58, {0x20, 0x00} }, |
Peter Feuerer | f944915 | 2009-09-18 12:41:07 -0700 | [diff] [blame] | 148 | {"Acer", "AOA150", "v0.3301", 0x55, 0x58, {0x20, 0x00} }, |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 149 | {"Acer", "AOA150", "v0.3304", 0x55, 0x58, {0x20, 0x00} }, |
| 150 | {"Acer", "AOA150", "v0.3305", 0x55, 0x58, {0x20, 0x00} }, |
Peter Feuerer | f944915 | 2009-09-18 12:41:07 -0700 | [diff] [blame] | 151 | {"Acer", "AOA150", "v0.3307", 0x55, 0x58, {0x20, 0x00} }, |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 152 | {"Acer", "AOA150", "v0.3308", 0x55, 0x58, {0x20, 0x00} }, |
| 153 | {"Acer", "AOA150", "v0.3309", 0x55, 0x58, {0x20, 0x00} }, |
| 154 | {"Acer", "AOA150", "v0.3310", 0x55, 0x58, {0x20, 0x00} }, |
| 155 | /* special BIOS / other */ |
| 156 | {"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x00} }, |
| 157 | {"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x00} }, |
| 158 | {"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00} }, |
| 159 | {"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x00} }, |
Peter Feuerer | f944915 | 2009-09-18 12:41:07 -0700 | [diff] [blame] | 160 | {"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00} }, |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 161 | /* pewpew-terminator */ |
| 162 | {"", "", "", 0, 0, {0, 0} } |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 163 | }; |
| 164 | |
| 165 | static const struct bios_settings_t *bios_cfg __read_mostly; |
| 166 | |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 167 | static int acerhdf_get_temp(int *temp) |
| 168 | { |
| 169 | u8 read_temp; |
| 170 | |
| 171 | if (ec_read(bios_cfg->tempreg, &read_temp)) |
| 172 | return -EINVAL; |
| 173 | |
Peter Feuerer | 7005291 | 2009-11-17 14:07:21 -0800 | [diff] [blame^] | 174 | *temp = read_temp * 1000; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 175 | |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | static int acerhdf_get_fanstate(int *state) |
| 180 | { |
| 181 | u8 fan; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 182 | |
| 183 | if (ec_read(bios_cfg->fanreg, &fan)) |
| 184 | return -EINVAL; |
| 185 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 186 | if (fan != bios_cfg->cmd.cmd_off) |
| 187 | *state = ACERHDF_FAN_AUTO; |
| 188 | else |
| 189 | *state = ACERHDF_FAN_OFF; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 190 | |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | static void acerhdf_change_fanstate(int state) |
| 195 | { |
| 196 | unsigned char cmd; |
| 197 | |
| 198 | if (verbose) |
| 199 | pr_notice("fan %s\n", (state == ACERHDF_FAN_OFF) ? |
| 200 | "OFF" : "ON"); |
| 201 | |
| 202 | if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) { |
| 203 | pr_err("invalid fan state %d requested, setting to auto!\n", |
| 204 | state); |
| 205 | state = ACERHDF_FAN_AUTO; |
| 206 | } |
| 207 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 208 | cmd = (state == ACERHDF_FAN_OFF) ? bios_cfg->cmd.cmd_off |
| 209 | : bios_cfg->cmd.cmd_auto; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 210 | fanstate = state; |
| 211 | |
| 212 | ec_write(bios_cfg->fanreg, cmd); |
| 213 | } |
| 214 | |
| 215 | static void acerhdf_check_param(struct thermal_zone_device *thermal) |
| 216 | { |
| 217 | if (fanon > ACERHDF_MAX_FANON) { |
| 218 | pr_err("fanon temperature too high, set to %d\n", |
| 219 | ACERHDF_MAX_FANON); |
| 220 | fanon = ACERHDF_MAX_FANON; |
| 221 | } |
| 222 | |
| 223 | if (kernelmode && prev_interval != interval) { |
| 224 | if (interval > ACERHDF_MAX_INTERVAL) { |
| 225 | pr_err("interval too high, set to %d\n", |
| 226 | ACERHDF_MAX_INTERVAL); |
| 227 | interval = ACERHDF_MAX_INTERVAL; |
| 228 | } |
| 229 | if (verbose) |
| 230 | pr_notice("interval changed to: %d\n", |
| 231 | interval); |
| 232 | thermal->polling_delay = interval*1000; |
| 233 | prev_interval = interval; |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | /* |
| 238 | * This is the thermal zone callback which does the delayed polling of the fan |
| 239 | * state. We do check /sysfs-originating settings here in acerhdf_check_param() |
| 240 | * as late as the polling interval is since we can't do that in the respective |
| 241 | * accessors of the module parameters. |
| 242 | */ |
| 243 | static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal, |
| 244 | unsigned long *t) |
| 245 | { |
| 246 | int temp, err = 0; |
| 247 | |
| 248 | acerhdf_check_param(thermal); |
| 249 | |
| 250 | err = acerhdf_get_temp(&temp); |
| 251 | if (err) |
| 252 | return err; |
| 253 | |
| 254 | if (verbose) |
| 255 | pr_notice("temp %d\n", temp); |
| 256 | |
| 257 | *t = temp; |
| 258 | return 0; |
| 259 | } |
| 260 | |
| 261 | static int acerhdf_bind(struct thermal_zone_device *thermal, |
| 262 | struct thermal_cooling_device *cdev) |
| 263 | { |
| 264 | /* if the cooling device is the one from acerhdf bind it */ |
| 265 | if (cdev != cl_dev) |
| 266 | return 0; |
| 267 | |
| 268 | if (thermal_zone_bind_cooling_device(thermal, 0, cdev)) { |
| 269 | pr_err("error binding cooling dev\n"); |
| 270 | return -EINVAL; |
| 271 | } |
| 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | static int acerhdf_unbind(struct thermal_zone_device *thermal, |
| 276 | struct thermal_cooling_device *cdev) |
| 277 | { |
| 278 | if (cdev != cl_dev) |
| 279 | return 0; |
| 280 | |
| 281 | if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) { |
| 282 | pr_err("error unbinding cooling dev\n"); |
| 283 | return -EINVAL; |
| 284 | } |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | static inline void acerhdf_revert_to_bios_mode(void) |
| 289 | { |
| 290 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); |
| 291 | kernelmode = 0; |
| 292 | if (thz_dev) |
| 293 | thz_dev->polling_delay = 0; |
| 294 | pr_notice("kernel mode fan control OFF\n"); |
| 295 | } |
| 296 | static inline void acerhdf_enable_kernelmode(void) |
| 297 | { |
| 298 | kernelmode = 1; |
| 299 | |
| 300 | thz_dev->polling_delay = interval*1000; |
| 301 | thermal_zone_device_update(thz_dev); |
| 302 | pr_notice("kernel mode fan control ON\n"); |
| 303 | } |
| 304 | |
| 305 | static int acerhdf_get_mode(struct thermal_zone_device *thermal, |
| 306 | enum thermal_device_mode *mode) |
| 307 | { |
| 308 | if (verbose) |
| 309 | pr_notice("kernel mode fan control %d\n", kernelmode); |
| 310 | |
| 311 | *mode = (kernelmode) ? THERMAL_DEVICE_ENABLED |
| 312 | : THERMAL_DEVICE_DISABLED; |
| 313 | |
| 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | /* |
| 318 | * set operation mode; |
| 319 | * enabled: the thermal layer of the kernel takes care about |
| 320 | * the temperature and the fan. |
| 321 | * disabled: the BIOS takes control of the fan. |
| 322 | */ |
| 323 | static int acerhdf_set_mode(struct thermal_zone_device *thermal, |
| 324 | enum thermal_device_mode mode) |
| 325 | { |
| 326 | if (mode == THERMAL_DEVICE_DISABLED && kernelmode) |
| 327 | acerhdf_revert_to_bios_mode(); |
| 328 | else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode) |
| 329 | acerhdf_enable_kernelmode(); |
| 330 | |
| 331 | return 0; |
| 332 | } |
| 333 | |
| 334 | static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip, |
| 335 | enum thermal_trip_type *type) |
| 336 | { |
| 337 | if (trip == 0) |
| 338 | *type = THERMAL_TRIP_ACTIVE; |
| 339 | |
| 340 | return 0; |
| 341 | } |
| 342 | |
| 343 | static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip, |
| 344 | unsigned long *temp) |
| 345 | { |
| 346 | if (trip == 0) |
| 347 | *temp = fanon; |
| 348 | |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal, |
| 353 | unsigned long *temperature) |
| 354 | { |
| 355 | *temperature = ACERHDF_TEMP_CRIT; |
| 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | /* bind callback functions to thermalzone */ |
| 360 | struct thermal_zone_device_ops acerhdf_dev_ops = { |
| 361 | .bind = acerhdf_bind, |
| 362 | .unbind = acerhdf_unbind, |
| 363 | .get_temp = acerhdf_get_ec_temp, |
| 364 | .get_mode = acerhdf_get_mode, |
| 365 | .set_mode = acerhdf_set_mode, |
| 366 | .get_trip_type = acerhdf_get_trip_type, |
| 367 | .get_trip_temp = acerhdf_get_trip_temp, |
| 368 | .get_crit_temp = acerhdf_get_crit_temp, |
| 369 | }; |
| 370 | |
| 371 | |
| 372 | /* |
| 373 | * cooling device callback functions |
| 374 | * get maximal fan cooling state |
| 375 | */ |
| 376 | static int acerhdf_get_max_state(struct thermal_cooling_device *cdev, |
| 377 | unsigned long *state) |
| 378 | { |
| 379 | *state = 1; |
| 380 | |
| 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev, |
| 385 | unsigned long *state) |
| 386 | { |
| 387 | int err = 0, tmp; |
| 388 | |
| 389 | err = acerhdf_get_fanstate(&tmp); |
| 390 | if (err) |
| 391 | return err; |
| 392 | |
| 393 | *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0; |
| 394 | return 0; |
| 395 | } |
| 396 | |
| 397 | /* change current fan state - is overwritten when running in kernel mode */ |
| 398 | static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev, |
| 399 | unsigned long state) |
| 400 | { |
| 401 | int cur_temp, cur_state, err = 0; |
| 402 | |
| 403 | if (!kernelmode) |
| 404 | return 0; |
| 405 | |
| 406 | err = acerhdf_get_temp(&cur_temp); |
| 407 | if (err) { |
| 408 | pr_err("error reading temperature, hand off control to BIOS\n"); |
| 409 | goto err_out; |
| 410 | } |
| 411 | |
| 412 | err = acerhdf_get_fanstate(&cur_state); |
| 413 | if (err) { |
| 414 | pr_err("error reading fan state, hand off control to BIOS\n"); |
| 415 | goto err_out; |
| 416 | } |
| 417 | |
| 418 | if (state == 0) { |
| 419 | /* turn fan off only if below fanoff temperature */ |
| 420 | if ((cur_state == ACERHDF_FAN_AUTO) && |
| 421 | (cur_temp < fanoff)) |
| 422 | acerhdf_change_fanstate(ACERHDF_FAN_OFF); |
| 423 | } else { |
| 424 | if (cur_state == ACERHDF_FAN_OFF) |
| 425 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); |
| 426 | } |
| 427 | return 0; |
| 428 | |
| 429 | err_out: |
| 430 | acerhdf_revert_to_bios_mode(); |
| 431 | return -EINVAL; |
| 432 | } |
| 433 | |
| 434 | /* bind fan callbacks to fan device */ |
| 435 | struct thermal_cooling_device_ops acerhdf_cooling_ops = { |
| 436 | .get_max_state = acerhdf_get_max_state, |
| 437 | .get_cur_state = acerhdf_get_cur_state, |
| 438 | .set_cur_state = acerhdf_set_cur_state, |
| 439 | }; |
| 440 | |
| 441 | /* suspend / resume functionality */ |
Borislav Petkov | ff27e1f | 2009-09-18 12:41:05 -0700 | [diff] [blame] | 442 | static int acerhdf_suspend(struct device *dev) |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 443 | { |
| 444 | if (kernelmode) |
| 445 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); |
| 446 | |
| 447 | if (verbose) |
| 448 | pr_notice("going suspend\n"); |
| 449 | |
| 450 | return 0; |
| 451 | } |
| 452 | |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 453 | static int __devinit acerhdf_probe(struct platform_device *device) |
| 454 | { |
| 455 | return 0; |
| 456 | } |
| 457 | |
| 458 | static int acerhdf_remove(struct platform_device *device) |
| 459 | { |
| 460 | return 0; |
| 461 | } |
| 462 | |
Borislav Petkov | ff27e1f | 2009-09-18 12:41:05 -0700 | [diff] [blame] | 463 | static struct dev_pm_ops acerhdf_pm_ops = { |
| 464 | .suspend = acerhdf_suspend, |
| 465 | .freeze = acerhdf_suspend, |
| 466 | }; |
| 467 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 468 | static struct platform_driver acerhdf_driver = { |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 469 | .driver = { |
Borislav Petkov | ff27e1f | 2009-09-18 12:41:05 -0700 | [diff] [blame] | 470 | .name = "acerhdf", |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 471 | .owner = THIS_MODULE, |
Borislav Petkov | ff27e1f | 2009-09-18 12:41:05 -0700 | [diff] [blame] | 472 | .pm = &acerhdf_pm_ops, |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 473 | }, |
| 474 | .probe = acerhdf_probe, |
| 475 | .remove = acerhdf_remove, |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 476 | }; |
| 477 | |
| 478 | |
| 479 | /* check hardware */ |
| 480 | static int acerhdf_check_hardware(void) |
| 481 | { |
| 482 | char const *vendor, *version, *product; |
| 483 | int i; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 484 | unsigned long prod_len = 0; |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 485 | |
| 486 | /* get BIOS data */ |
| 487 | vendor = dmi_get_system_info(DMI_SYS_VENDOR); |
| 488 | version = dmi_get_system_info(DMI_BIOS_VERSION); |
| 489 | product = dmi_get_system_info(DMI_PRODUCT_NAME); |
| 490 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 491 | |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 492 | pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER); |
| 493 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 494 | if (force_bios[0]) { |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 495 | version = force_bios; |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 496 | pr_info("forcing BIOS version: %s\n", version); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 497 | kernelmode = 0; |
| 498 | } |
| 499 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 500 | if (force_product[0]) { |
| 501 | product = force_product; |
| 502 | pr_info("forcing BIOS product: %s\n", product); |
| 503 | kernelmode = 0; |
| 504 | } |
| 505 | |
| 506 | prod_len = strlen(product); |
| 507 | |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 508 | if (verbose) |
| 509 | pr_info("BIOS info: %s %s, product: %s\n", |
| 510 | vendor, version, product); |
| 511 | |
| 512 | /* search BIOS version and vendor in BIOS settings table */ |
| 513 | for (i = 0; bios_tbl[i].version[0]; i++) { |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 514 | if (strlen(bios_tbl[i].product) >= prod_len && |
| 515 | !strncmp(bios_tbl[i].product, product, |
| 516 | strlen(bios_tbl[i].product)) && |
| 517 | !strcmp(bios_tbl[i].vendor, vendor) && |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 518 | !strcmp(bios_tbl[i].version, version)) { |
| 519 | bios_cfg = &bios_tbl[i]; |
| 520 | break; |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | if (!bios_cfg) { |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 525 | pr_err("unknown (unsupported) BIOS version %s/%s/%s, " |
| 526 | "please report, aborting!\n", vendor, product, version); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 527 | return -EINVAL; |
| 528 | } |
| 529 | |
| 530 | /* |
| 531 | * if started with kernel mode off, prevent the kernel from switching |
| 532 | * off the fan |
| 533 | */ |
| 534 | if (!kernelmode) { |
| 535 | pr_notice("Fan control off, to enable do:\n"); |
| 536 | pr_notice("echo -n \"enabled\" > " |
| 537 | "/sys/class/thermal/thermal_zone0/mode\n"); |
| 538 | } |
| 539 | |
| 540 | return 0; |
| 541 | } |
| 542 | |
| 543 | static int acerhdf_register_platform(void) |
| 544 | { |
| 545 | int err = 0; |
| 546 | |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 547 | err = platform_driver_register(&acerhdf_driver); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 548 | if (err) |
| 549 | return err; |
| 550 | |
| 551 | acerhdf_dev = platform_device_alloc("acerhdf", -1); |
| 552 | platform_device_add(acerhdf_dev); |
| 553 | |
| 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | static void acerhdf_unregister_platform(void) |
| 558 | { |
| 559 | if (!acerhdf_dev) |
| 560 | return; |
| 561 | |
| 562 | platform_device_del(acerhdf_dev); |
Peter Feuerer | ded0cdf | 2009-08-06 15:57:52 -0700 | [diff] [blame] | 563 | platform_driver_unregister(&acerhdf_driver); |
Peter Feuerer | e86435e | 2009-06-21 18:53:03 +0200 | [diff] [blame] | 564 | } |
| 565 | |
| 566 | static int acerhdf_register_thermal(void) |
| 567 | { |
| 568 | cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL, |
| 569 | &acerhdf_cooling_ops); |
| 570 | |
| 571 | if (IS_ERR(cl_dev)) |
| 572 | return -EINVAL; |
| 573 | |
| 574 | thz_dev = thermal_zone_device_register("acerhdf", 1, NULL, |
| 575 | &acerhdf_dev_ops, 0, 0, 0, |
| 576 | (kernelmode) ? interval*1000 : 0); |
| 577 | if (IS_ERR(thz_dev)) |
| 578 | return -EINVAL; |
| 579 | |
| 580 | return 0; |
| 581 | } |
| 582 | |
| 583 | static void acerhdf_unregister_thermal(void) |
| 584 | { |
| 585 | if (cl_dev) { |
| 586 | thermal_cooling_device_unregister(cl_dev); |
| 587 | cl_dev = NULL; |
| 588 | } |
| 589 | |
| 590 | if (thz_dev) { |
| 591 | thermal_zone_device_unregister(thz_dev); |
| 592 | thz_dev = NULL; |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | static int __init acerhdf_init(void) |
| 597 | { |
| 598 | int err = 0; |
| 599 | |
| 600 | err = acerhdf_check_hardware(); |
| 601 | if (err) |
| 602 | goto out_err; |
| 603 | |
| 604 | err = acerhdf_register_platform(); |
| 605 | if (err) |
| 606 | goto err_unreg; |
| 607 | |
| 608 | err = acerhdf_register_thermal(); |
| 609 | if (err) |
| 610 | goto err_unreg; |
| 611 | |
| 612 | return 0; |
| 613 | |
| 614 | err_unreg: |
| 615 | acerhdf_unregister_thermal(); |
| 616 | acerhdf_unregister_platform(); |
| 617 | |
| 618 | out_err: |
| 619 | return -ENODEV; |
| 620 | } |
| 621 | |
| 622 | static void __exit acerhdf_exit(void) |
| 623 | { |
| 624 | acerhdf_change_fanstate(ACERHDF_FAN_AUTO); |
| 625 | acerhdf_unregister_thermal(); |
| 626 | acerhdf_unregister_platform(); |
| 627 | } |
| 628 | |
| 629 | MODULE_LICENSE("GPL"); |
| 630 | MODULE_AUTHOR("Peter Feuerer"); |
| 631 | MODULE_DESCRIPTION("Aspire One temperature and fan driver"); |
| 632 | MODULE_ALIAS("dmi:*:*Acer*:*:"); |
| 633 | MODULE_ALIAS("dmi:*:*Gateway*:*:"); |
| 634 | MODULE_ALIAS("dmi:*:*Packard Bell*:*:"); |
| 635 | |
| 636 | module_init(acerhdf_init); |
| 637 | module_exit(acerhdf_exit); |