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linux/drivers/platform/x86/acerhdf.c
Daniel Lezcano b39d2dd5b5 thermal/core: Remove ms based delay fields 
The code does no longer use the ms unit based fields to set the
delays as they are replaced by the jiffies.

Remove them and replace their user to use the jiffies version instead.

Cc: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Peter Kästle <peter@piie.net>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20201216220337.839878-3-daniel.lezcano@linaro.org
2021-01-19 22:23:49 +01:00

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// 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,
};
/* checks if str begins with start */
static int str_starts_with(const char *str, const char *start)
{
unsigned long str_len = 0, start_len = 0;
str_len = strlen(str);
start_len = strlen(start);
if (str_len >= start_len &&
!strncmp(str, start, start_len))
return 1;
return 0;
}
/* 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 (str_starts_with(vendor, bt->vendor) &&
str_starts_with(product, bt->product) &&
str_starts_with(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", -1);
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");
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