// SPDX-License-Identifier: GPL-2.0-or-later /* * acerhdf - A driver which monitors the temperature * of the aspire one netbook, turns on/off the fan * as soon as the upper/lower threshold is reached. * * (C) 2009 - Peter Kaestle peter (a) piie.net * https://piie.net * 2009 Borislav Petkov bp (a) alien8.de * * Inspired by and many thanks to: * o acerfand - Rachel Greenham * o acer_ec.pl - Michael Kurz michi.kurz (at) googlemail.com * - Petr Tomasek tomasek (#) etf,cuni,cz * - Carlos Corbacho cathectic (at) gmail.com * o lkml - Matthew Garrett * - Borislav Petkov * - Andreas Mohr */ #define pr_fmt(fmt) "acerhdf: " fmt #include #include #include #include #include #include /* * The driver is started with "kernel mode off" by default. That means, the BIOS * is still in control of the fan. In this mode the driver allows to read the * temperature of the cpu and a userspace tool may take over control of the fan. * If the driver is switched to "kernel mode" (e.g. via module parameter) the * driver is in full control of the fan. If you want the module to be started in * kernel mode by default, define the following: */ #undef START_IN_KERNEL_MODE #define DRV_VER "0.7.0" /* * According to the Atom N270 datasheet, * (http://download.intel.com/design/processor/datashts/320032.pdf) the * CPU's optimal operating limits denoted in junction temperature as * measured by the on-die thermal monitor are within 0 <= Tj <= 90. So, * assume 89°C is critical temperature. */ #define ACERHDF_DEFAULT_TEMP_FANON 60000 #define ACERHDF_DEFAULT_TEMP_FANOFF 53000 #define ACERHDF_TEMP_CRIT 89000 #define ACERHDF_FAN_OFF 0 #define ACERHDF_FAN_AUTO 1 /* * No matter what value the user puts into the fanon variable, turn on the fan * at 80 degree Celsius to prevent hardware damage */ #define ACERHDF_MAX_FANON 80000 /* * Maximum interval between two temperature checks is 15 seconds, as the die * can get hot really fast under heavy load (plus we shouldn't forget about * possible impact of _external_ aggressive sources such as heaters, sun etc.) */ #define ACERHDF_MAX_INTERVAL 15 #ifdef START_IN_KERNEL_MODE static int kernelmode = 1; #else static int kernelmode; #endif static unsigned int interval = 10; static unsigned int fanon = ACERHDF_DEFAULT_TEMP_FANON; static unsigned int fanoff = ACERHDF_DEFAULT_TEMP_FANOFF; static unsigned int verbose; static unsigned int list_supported; static unsigned int fanstate = ACERHDF_FAN_AUTO; static char force_bios[16]; static char force_product[16]; static struct thermal_zone_device *thz_dev; static struct thermal_cooling_device *cl_dev; static struct platform_device *acerhdf_dev; module_param(kernelmode, uint, 0); MODULE_PARM_DESC(kernelmode, "Kernel mode fan control on / off"); module_param(fanon, uint, 0600); MODULE_PARM_DESC(fanon, "Turn the fan on above this temperature"); module_param(fanoff, uint, 0600); MODULE_PARM_DESC(fanoff, "Turn the fan off below this temperature"); module_param(verbose, uint, 0600); MODULE_PARM_DESC(verbose, "Enable verbose dmesg output"); module_param(list_supported, uint, 0600); MODULE_PARM_DESC(list_supported, "List supported models and BIOS versions"); module_param_string(force_bios, force_bios, 16, 0); MODULE_PARM_DESC(force_bios, "Pretend system has this known supported BIOS version"); module_param_string(force_product, force_product, 16, 0); MODULE_PARM_DESC(force_product, "Pretend system is this known supported model"); /* * cmd_off: to switch the fan completely off and check if the fan is off * cmd_auto: to set the BIOS in control of the fan. The BIOS regulates then * the fan speed depending on the temperature */ struct fancmd { u8 cmd_off; u8 cmd_auto; }; struct manualcmd { u8 mreg; u8 moff; }; /* default register and command to disable fan in manual mode */ static const struct manualcmd mcmd = { .mreg = 0x94, .moff = 0xff, }; /* BIOS settings - only used during probe */ struct bios_settings { const char *vendor; const char *product; const char *version; u8 fanreg; u8 tempreg; struct fancmd cmd; int mcmd_enable; }; /* This could be a daughter struct in the above, but not worth the redirect */ struct ctrl_settings { u8 fanreg; u8 tempreg; struct fancmd cmd; int mcmd_enable; }; static struct thermal_trip trips[] = { [0] = { .temperature = ACERHDF_DEFAULT_TEMP_FANON, .hysteresis = ACERHDF_DEFAULT_TEMP_FANON - ACERHDF_DEFAULT_TEMP_FANOFF, .type = THERMAL_TRIP_ACTIVE }, [1] = { .temperature = ACERHDF_TEMP_CRIT, .type = THERMAL_TRIP_CRITICAL } }; static struct ctrl_settings ctrl_cfg __read_mostly; /* Register addresses and values for different BIOS versions */ static const struct bios_settings bios_tbl[] __initconst = { /* AOA110 */ {"Acer", "AOA110", "v0.3109", 0x55, 0x58, {0x1f, 0x00}, 0}, {"Acer", "AOA110", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0}, {"Acer", "AOA110", "v0.3301", 0x55, 0x58, {0xaf, 0x00}, 0}, {"Acer", "AOA110", "v0.3304", 0x55, 0x58, {0xaf, 0x00}, 0}, {"Acer", "AOA110", "v0.3305", 0x55, 0x58, {0xaf, 0x00}, 0}, {"Acer", "AOA110", "v0.3307", 0x55, 0x58, {0xaf, 0x00}, 0}, {"Acer", "AOA110", "v0.3308", 0x55, 0x58, {0x21, 0x00}, 0}, {"Acer", "AOA110", "v0.3309", 0x55, 0x58, {0x21, 0x00}, 0}, {"Acer", "AOA110", "v0.3310", 0x55, 0x58, {0x21, 0x00}, 0}, /* AOA150 */ {"Acer", "AOA150", "v0.3114", 0x55, 0x58, {0x1f, 0x00}, 0}, {"Acer", "AOA150", "v0.3301", 0x55, 0x58, {0x20, 0x00}, 0}, {"Acer", "AOA150", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0}, {"Acer", "AOA150", "v0.3305", 0x55, 0x58, {0x20, 0x00}, 0}, {"Acer", "AOA150", "v0.3307", 0x55, 0x58, {0x20, 0x00}, 0}, {"Acer", "AOA150", "v0.3308", 0x55, 0x58, {0x20, 0x00}, 0}, {"Acer", "AOA150", "v0.3309", 0x55, 0x58, {0x20, 0x00}, 0}, {"Acer", "AOA150", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0}, /* LT1005u */ {"Acer", "LT-10Q", "v0.3310", 0x55, 0x58, {0x20, 0x00}, 0}, /* Acer 1410 */ {"Acer", "Aspire 1410", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1410", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1410", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1410", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1410", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1410", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1410", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1410", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1410", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1410", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1410", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0}, /* Acer 1810xx */ {"Acer", "Aspire 1810TZ", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810T", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810TZ", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810T", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810TZ", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810T", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810TZ", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810T", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810TZ", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810T", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810TZ", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810T", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810TZ", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810T", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810TZ", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810T", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810TZ", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810T", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810TZ", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810T", "v1.3310", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810TZ", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1810T", "v1.3314", 0x55, 0x58, {0x9e, 0x00}, 0}, /* Acer 5755G */ {"Acer", "Aspire 5755G", "V1.20", 0xab, 0xb4, {0x00, 0x08}, 0}, {"Acer", "Aspire 5755G", "V1.21", 0xab, 0xb3, {0x00, 0x08}, 0}, /* Acer 521 */ {"Acer", "AO521", "V1.11", 0x55, 0x58, {0x1f, 0x00}, 0}, /* Acer 531 */ {"Acer", "AO531h", "v0.3104", 0x55, 0x58, {0x20, 0x00}, 0}, {"Acer", "AO531h", "v0.3201", 0x55, 0x58, {0x20, 0x00}, 0}, {"Acer", "AO531h", "v0.3304", 0x55, 0x58, {0x20, 0x00}, 0}, /* Acer 751 */ {"Acer", "AO751h", "V0.3206", 0x55, 0x58, {0x21, 0x00}, 0}, {"Acer", "AO751h", "V0.3212", 0x55, 0x58, {0x21, 0x00}, 0}, /* Acer 753 */ {"Acer", "Aspire One 753", "V1.24", 0x93, 0xac, {0x14, 0x04}, 1}, /* Acer 1825 */ {"Acer", "Aspire 1825PTZ", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Acer", "Aspire 1825PTZ", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0}, /* Acer Extensa 5420 */ {"Acer", "Extensa 5420", "V1.17", 0x93, 0xac, {0x14, 0x04}, 1}, /* Acer Aspire 5315 */ {"Acer", "Aspire 5315", "V1.19", 0x93, 0xac, {0x14, 0x04}, 1}, /* Acer Aspire 5739 */ {"Acer", "Aspire 5739G", "V1.3311", 0x55, 0x58, {0x20, 0x00}, 0}, /* Acer TravelMate 7730 */ {"Acer", "TravelMate 7730G", "v0.3509", 0x55, 0x58, {0xaf, 0x00}, 0}, /* Acer Aspire 7551 */ {"Acer", "Aspire 7551", "V1.18", 0x93, 0xa8, {0x14, 0x04}, 1}, /* Acer TravelMate TM8573T */ {"Acer", "TM8573T", "V1.13", 0x93, 0xa8, {0x14, 0x04}, 1}, /* Gateway */ {"Gateway", "AOA110", "v0.3103", 0x55, 0x58, {0x21, 0x00}, 0}, {"Gateway", "AOA150", "v0.3103", 0x55, 0x58, {0x20, 0x00}, 0}, {"Gateway", "LT31", "v1.3103", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Gateway", "LT31", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Gateway", "LT31", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Gateway", "LT31", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Gateway", "LT31", "v1.3307", 0x55, 0x58, {0x9e, 0x00}, 0}, /* Packard Bell */ {"Packard Bell", "DOA150", "v0.3104", 0x55, 0x58, {0x21, 0x00}, 0}, {"Packard Bell", "DOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0}, {"Packard Bell", "AOA110", "v0.3105", 0x55, 0x58, {0x21, 0x00}, 0}, {"Packard Bell", "AOA150", "v0.3105", 0x55, 0x58, {0x20, 0x00}, 0}, {"Packard Bell", "ENBFT", "V1.3118", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "ENBFT", "V1.3127", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "DOTMU", "v1.3303", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "DOTMU", "v0.3120", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "DOTMU", "v0.3108", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "DOTMU", "v0.3113", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "DOTMU", "v0.3115", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "DOTMU", "v0.3117", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "DOTMU", "v0.3119", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "DOTMU", "v1.3204", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "DOTMA", "v1.3201", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "DOTMA", "v1.3302", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "DOTMA", "v1.3303t", 0x55, 0x58, {0x9e, 0x00}, 0}, {"Packard Bell", "DOTVR46", "v1.3308", 0x55, 0x58, {0x9e, 0x00}, 0}, /* pewpew-terminator */ {"", "", "", 0, 0, {0, 0}, 0} }; /* * this struct is used to instruct thermal layer to use bang_bang instead of * default governor for acerhdf */ static struct thermal_zone_params acerhdf_zone_params = { .governor_name = "bang_bang", }; static int acerhdf_get_temp(int *temp) { u8 read_temp; if (ec_read(ctrl_cfg.tempreg, &read_temp)) return -EINVAL; *temp = read_temp * 1000; return 0; } static int acerhdf_get_fanstate(int *state) { u8 fan; if (ec_read(ctrl_cfg.fanreg, &fan)) return -EINVAL; if (fan != ctrl_cfg.cmd.cmd_off) *state = ACERHDF_FAN_AUTO; else *state = ACERHDF_FAN_OFF; return 0; } static void acerhdf_change_fanstate(int state) { unsigned char cmd; if (verbose) pr_notice("fan %s\n", state == ACERHDF_FAN_OFF ? "OFF" : "ON"); if ((state != ACERHDF_FAN_OFF) && (state != ACERHDF_FAN_AUTO)) { pr_err("invalid fan state %d requested, setting to auto!\n", state); state = ACERHDF_FAN_AUTO; } cmd = (state == ACERHDF_FAN_OFF) ? ctrl_cfg.cmd.cmd_off : ctrl_cfg.cmd.cmd_auto; fanstate = state; ec_write(ctrl_cfg.fanreg, cmd); if (ctrl_cfg.mcmd_enable && state == ACERHDF_FAN_OFF) { if (verbose) pr_notice("turning off fan manually\n"); ec_write(mcmd.mreg, mcmd.moff); } } static void acerhdf_check_param(struct thermal_zone_device *thermal) { if (fanon > ACERHDF_MAX_FANON) { pr_err("fanon temperature too high, set to %d\n", ACERHDF_MAX_FANON); fanon = ACERHDF_MAX_FANON; } if (fanon < fanoff) { pr_err("fanoff temperature (%d) is above fanon temperature (%d), clamping to %d\n", fanoff, fanon, fanon); fanoff = fanon; } trips[0].temperature = fanon; trips[0].hysteresis = fanon - fanoff; if (kernelmode) { if (interval > ACERHDF_MAX_INTERVAL) { pr_err("interval too high, set to %d\n", ACERHDF_MAX_INTERVAL); interval = ACERHDF_MAX_INTERVAL; } if (verbose) pr_notice("interval changed to: %d\n", interval); } } /* * This is the thermal zone callback which does the delayed polling of the fan * state. We do check /sysfs-originating settings here in acerhdf_check_param() * as late as the polling interval is since we can't do that in the respective * accessors of the module parameters. */ static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal, int *t) { int temp, err = 0; err = acerhdf_get_temp(&temp); if (err) return err; if (verbose) pr_notice("temp %d\n", temp); *t = temp; return 0; } static bool acerhdf_should_bind(struct thermal_zone_device *thermal, const struct thermal_trip *trip, struct thermal_cooling_device *cdev, struct cooling_spec *c) { /* if the cooling device is the one from acerhdf bind it */ return cdev == cl_dev && trip->type == THERMAL_TRIP_ACTIVE; } static inline void acerhdf_revert_to_bios_mode(void) { acerhdf_change_fanstate(ACERHDF_FAN_AUTO); kernelmode = 0; pr_notice("kernel mode fan control OFF\n"); } static inline void acerhdf_enable_kernelmode(void) { kernelmode = 1; pr_notice("kernel mode fan control ON\n"); } /* * set operation mode; * enabled: the thermal layer of the kernel takes care about * the temperature and the fan. * disabled: the BIOS takes control of the fan. */ static int acerhdf_change_mode(struct thermal_zone_device *thermal, enum thermal_device_mode mode) { if (mode == THERMAL_DEVICE_DISABLED && kernelmode) acerhdf_revert_to_bios_mode(); else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode) acerhdf_enable_kernelmode(); return 0; } static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal, int *temperature) { *temperature = ACERHDF_TEMP_CRIT; return 0; } /* bind callback functions to thermalzone */ static struct thermal_zone_device_ops acerhdf_dev_ops = { .should_bind = acerhdf_should_bind, .get_temp = acerhdf_get_ec_temp, .change_mode = acerhdf_change_mode, .get_crit_temp = acerhdf_get_crit_temp, }; /* * cooling device callback functions * get maximal fan cooling state */ static int acerhdf_get_max_state(struct thermal_cooling_device *cdev, unsigned long *state) { *state = 1; return 0; } static int acerhdf_get_cur_state(struct thermal_cooling_device *cdev, unsigned long *state) { int err = 0, tmp; err = acerhdf_get_fanstate(&tmp); if (err) return err; *state = (tmp == ACERHDF_FAN_AUTO) ? 1 : 0; return 0; } /* change current fan state - is overwritten when running in kernel mode */ static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state) { int cur_temp, cur_state, err = 0; if (!kernelmode) return 0; err = acerhdf_get_temp(&cur_temp); if (err) { pr_err("error reading temperature, hand off control to BIOS\n"); goto err_out; } err = acerhdf_get_fanstate(&cur_state); if (err) { pr_err("error reading fan state, hand off control to BIOS\n"); goto err_out; } if (state == 0) { if (cur_state == ACERHDF_FAN_AUTO) acerhdf_change_fanstate(ACERHDF_FAN_OFF); } else { if (cur_state == ACERHDF_FAN_OFF) acerhdf_change_fanstate(ACERHDF_FAN_AUTO); } return 0; err_out: acerhdf_revert_to_bios_mode(); return -EINVAL; } /* bind fan callbacks to fan device */ static const struct thermal_cooling_device_ops acerhdf_cooling_ops = { .get_max_state = acerhdf_get_max_state, .get_cur_state = acerhdf_get_cur_state, .set_cur_state = acerhdf_set_cur_state, }; /* suspend / resume functionality */ static int acerhdf_suspend(struct device *dev) { if (kernelmode) acerhdf_change_fanstate(ACERHDF_FAN_AUTO); if (verbose) pr_notice("going suspend\n"); return 0; } static int acerhdf_probe(struct platform_device *device) { return 0; } static const struct dev_pm_ops acerhdf_pm_ops = { .suspend = acerhdf_suspend, .freeze = acerhdf_suspend, }; static struct platform_driver acerhdf_driver = { .driver = { .name = "acerhdf", .pm = &acerhdf_pm_ops, }, .probe = acerhdf_probe, }; /* check hardware */ static int __init acerhdf_check_hardware(void) { char const *vendor, *version, *product; const struct bios_settings *bt = NULL; int found = 0; /* get BIOS data */ vendor = dmi_get_system_info(DMI_SYS_VENDOR); version = dmi_get_system_info(DMI_BIOS_VERSION); product = dmi_get_system_info(DMI_PRODUCT_NAME); if (!vendor || !version || !product) { pr_err("error getting hardware information\n"); return -EINVAL; } pr_info("Acer Aspire One Fan driver, v.%s\n", DRV_VER); if (list_supported) { pr_info("List of supported Manufacturer/Model/BIOS:\n"); pr_info("---------------------------------------------------\n"); for (bt = bios_tbl; bt->vendor[0]; bt++) { pr_info("%-13s | %-17s | %-10s\n", bt->vendor, bt->product, bt->version); } pr_info("---------------------------------------------------\n"); return -ECANCELED; } if (force_bios[0]) { version = force_bios; pr_info("forcing BIOS version: %s\n", version); kernelmode = 0; } if (force_product[0]) { product = force_product; pr_info("forcing BIOS product: %s\n", product); kernelmode = 0; } if (verbose) pr_info("BIOS info: %s %s, product: %s\n", vendor, version, product); /* search BIOS version and vendor in BIOS settings table */ for (bt = bios_tbl; bt->vendor[0]; bt++) { /* * check if actual hardware BIOS vendor, product and version * IDs start with the strings of BIOS table entry */ if (strstarts(vendor, bt->vendor) && strstarts(product, bt->product) && strstarts(version, bt->version)) { found = 1; break; } } if (!found) { pr_err("unknown (unsupported) BIOS version %s/%s/%s, please report, aborting!\n", vendor, product, version); return -EINVAL; } /* Copy control settings from BIOS table before we free it. */ ctrl_cfg.fanreg = bt->fanreg; ctrl_cfg.tempreg = bt->tempreg; memcpy(&ctrl_cfg.cmd, &bt->cmd, sizeof(struct fancmd)); ctrl_cfg.mcmd_enable = bt->mcmd_enable; /* * if started with kernel mode off, prevent the kernel from switching * off the fan */ if (!kernelmode) { pr_notice("Fan control off, to enable do:\n"); pr_notice("echo -n \"enabled\" > /sys/class/thermal/thermal_zoneN/mode # N=0,1,2...\n"); } return 0; } static int __init acerhdf_register_platform(void) { int err = 0; err = platform_driver_register(&acerhdf_driver); if (err) return err; acerhdf_dev = platform_device_alloc("acerhdf", PLATFORM_DEVID_NONE); if (!acerhdf_dev) { err = -ENOMEM; goto err_device_alloc; } err = platform_device_add(acerhdf_dev); if (err) goto err_device_add; return 0; err_device_add: platform_device_put(acerhdf_dev); err_device_alloc: platform_driver_unregister(&acerhdf_driver); return err; } static void acerhdf_unregister_platform(void) { platform_device_unregister(acerhdf_dev); platform_driver_unregister(&acerhdf_driver); } static int __init acerhdf_register_thermal(void) { int ret; cl_dev = thermal_cooling_device_register("acerhdf-fan", NULL, &acerhdf_cooling_ops); if (IS_ERR(cl_dev)) return -EINVAL; thz_dev = thermal_zone_device_register_with_trips("acerhdf", trips, ARRAY_SIZE(trips), NULL, &acerhdf_dev_ops, &acerhdf_zone_params, 0, (kernelmode) ? interval*1000 : 0); if (IS_ERR(thz_dev)) return -EINVAL; if (kernelmode) ret = thermal_zone_device_enable(thz_dev); else ret = thermal_zone_device_disable(thz_dev); if (ret) return ret; return 0; } static void acerhdf_unregister_thermal(void) { if (cl_dev) { thermal_cooling_device_unregister(cl_dev); cl_dev = NULL; } if (thz_dev) { thermal_zone_device_unregister(thz_dev); thz_dev = NULL; } } static int __init acerhdf_init(void) { int err = 0; err = acerhdf_check_hardware(); if (err) goto out_err; err = acerhdf_register_platform(); if (err) goto out_err; err = acerhdf_register_thermal(); if (err) goto err_unreg; return 0; err_unreg: acerhdf_unregister_thermal(); acerhdf_unregister_platform(); out_err: return err; } static void __exit acerhdf_exit(void) { acerhdf_change_fanstate(ACERHDF_FAN_AUTO); acerhdf_unregister_thermal(); acerhdf_unregister_platform(); } MODULE_LICENSE("GPL"); MODULE_AUTHOR("Peter Kaestle"); MODULE_DESCRIPTION("Aspire One temperature and fan driver"); MODULE_ALIAS("dmi:*:*Acer*:pnAOA*:"); MODULE_ALIAS("dmi:*:*Acer*:pnAO751h*:"); MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1410*:"); MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1810*:"); MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5755G:"); MODULE_ALIAS("dmi:*:*Acer*:pnAspire*1825PTZ:"); MODULE_ALIAS("dmi:*:*Acer*:pnAO521*:"); MODULE_ALIAS("dmi:*:*Acer*:pnAO531*:"); MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5739G:"); MODULE_ALIAS("dmi:*:*Acer*:pnAspire*One*753:"); MODULE_ALIAS("dmi:*:*Acer*:pnAspire*5315:"); MODULE_ALIAS("dmi:*:*Acer*:TravelMate*7730G:"); MODULE_ALIAS("dmi:*:*Acer*:pnAspire*7551:"); MODULE_ALIAS("dmi:*:*Acer*:TM8573T:"); MODULE_ALIAS("dmi:*:*Gateway*:pnAOA*:"); MODULE_ALIAS("dmi:*:*Gateway*:pnLT31*:"); MODULE_ALIAS("dmi:*:*Packard*Bell*:pnAOA*:"); MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOA*:"); MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMU*:"); MODULE_ALIAS("dmi:*:*Packard*Bell*:pnENBFT*:"); MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTMA*:"); MODULE_ALIAS("dmi:*:*Packard*Bell*:pnDOTVR46*:"); MODULE_ALIAS("dmi:*:*Acer*:pnExtensa*5420*:"); module_init(acerhdf_init); module_exit(acerhdf_exit); static int interval_set_uint(const char *val, const struct kernel_param *kp) { int ret; ret = param_set_uint(val, kp); if (ret) return ret; acerhdf_check_param(thz_dev); return 0; } static const struct kernel_param_ops interval_ops = { .set = interval_set_uint, .get = param_get_uint, }; module_param_cb(interval, &interval_ops, &interval, 0000); MODULE_PARM_DESC(interval, "Polling interval of temperature check");