diff options
Diffstat (limited to 'drivers/platform/x86/acerhdf.c')
| -rw-r--r-- | drivers/platform/x86/acerhdf.c | 832 |
1 files changed, 832 insertions, 0 deletions
diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c new file mode 100644 index 000000000..d2c0fc38c --- /dev/null +++ b/drivers/platform/x86/acerhdf.c @@ -0,0 +1,832 @@ +// 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 <linux/kernel.h> +#include <linux/module.h> +#include <linux/dmi.h> +#include <linux/acpi.h> +#include <linux/thermal.h> +#include <linux/platform_device.h> + +/* + * 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_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 = 60000; +static unsigned int fanoff = 53000; +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 unsigned int prev_interval; +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 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 (kernelmode && prev_interval != interval) { + 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); + + if (thermal) + thermal->polling_delay_jiffies = + round_jiffies(msecs_to_jiffies(interval * 1000)); + + prev_interval = 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 int acerhdf_bind(struct thermal_zone_device *thermal, + struct thermal_cooling_device *cdev) +{ + /* if the cooling device is the one from acerhdf bind it */ + if (cdev != cl_dev) + return 0; + + if (thermal_zone_bind_cooling_device(thermal, 0, cdev, + THERMAL_NO_LIMIT, THERMAL_NO_LIMIT, + THERMAL_WEIGHT_DEFAULT)) { + pr_err("error binding cooling dev\n"); + return -EINVAL; + } + return 0; +} + +static int acerhdf_unbind(struct thermal_zone_device *thermal, + struct thermal_cooling_device *cdev) +{ + if (cdev != cl_dev) + return 0; + + if (thermal_zone_unbind_cooling_device(thermal, 0, cdev)) { + pr_err("error unbinding cooling dev\n"); + return -EINVAL; + } + return 0; +} + +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_trip_type(struct thermal_zone_device *thermal, int trip, + enum thermal_trip_type *type) +{ + if (trip == 0) + *type = THERMAL_TRIP_ACTIVE; + else if (trip == 1) + *type = THERMAL_TRIP_CRITICAL; + else + return -EINVAL; + + return 0; +} + +static int acerhdf_get_trip_hyst(struct thermal_zone_device *thermal, int trip, + int *temp) +{ + if (trip != 0) + return -EINVAL; + + *temp = fanon - fanoff; + + return 0; +} + +static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip, + int *temp) +{ + if (trip == 0) + *temp = fanon; + else if (trip == 1) + *temp = ACERHDF_TEMP_CRIT; + else + return -EINVAL; + + 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 = { + .bind = acerhdf_bind, + .unbind = acerhdf_unbind, + .get_temp = acerhdf_get_ec_temp, + .change_mode = acerhdf_change_mode, + .get_trip_type = acerhdf_get_trip_type, + .get_trip_hyst = acerhdf_get_trip_hyst, + .get_trip_temp = acerhdf_get_trip_temp, + .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 int acerhdf_remove(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, + .remove = acerhdf_remove, +}; + +/* 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("acerhdf", 2, 0, 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; + + if (strcmp(thz_dev->governor->name, + acerhdf_zone_params.governor_name)) { + pr_err("Didn't get thermal governor %s, perhaps not compiled into thermal subsystem.\n", + acerhdf_zone_params.governor_name); + return -EINVAL; + } + + 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, 0600); +MODULE_PARM_DESC(interval, "Polling interval of temperature check"); |