Release 4.11 drivers/platform/x86/acerhdf.c

Directory: drivers/platform/x86
/*
 * 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 Feuerer     peter (a) piie.net
 *                              http://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
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


#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 89Â°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 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(interval, uint, 0600);
MODULE_PARM_DESC(interval, "Polling interval of temperature check");
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_string(force_bios, force_bios, 16, 0);
MODULE_PARM_DESC(force_bios, "Force BIOS version and omit BIOS check");
module_param_string(force_product, force_product, 16, 0);
MODULE_PARM_DESC(force_product, "Force BIOS product and omit BIOS check");

/*
 * 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 */

struct bios_settings {
	
const char *vendor;
	
const char *product;
	
const char *version;
	
u8 fanreg;
	
u8 tempreg;
	
struct fancmd cmd;
	
int mcmd_enable;
};

/* Register addresses and values for different BIOS versions */

static const struct bios_settings bios_tbl[] = {
	/* 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 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},
	/* 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}
};


static const struct bios_settings *bios_cfg __read_mostly;

/*
 * 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(bios_cfg->tempreg, &read_temp))
		return -EINVAL;

	*temp = read_temp * 1000;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 39 100.00% 2 100.00%
Total 39 100.00% 2 100.00%



static int acerhdf_get_fanstate(int *state)
{
	u8 fan;

	if (ec_read(bios_cfg->fanreg, &fan))
		return -EINVAL;

	if (fan != bios_cfg->cmd.cmd_off)
		*state = ACERHDF_FAN_AUTO;
	else
		*state = ACERHDF_FAN_OFF;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 53 100.00% 3 100.00%
Total 53 100.00% 3 100.00%



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) ? bios_cfg->cmd.cmd_off
					 : bios_cfg->cmd.cmd_auto;
	fanstate = state;

	ec_write(bios_cfg->fanreg, cmd);

	if (bios_cfg->mcmd_enable && state == ACERHDF_FAN_OFF) {
		if (verbose)
			pr_notice("turning off fan manually\n");
		ec_write(mcmd.mreg, mcmd.moff);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 122 100.00% 3 100.00%
Total 122 100.00% 3 100.00%



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);
		thermal->polling_delay = interval*1000;
		prev_interval = interval;
	}
}

Contributors
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Peter Feuerer 82 100.00% 1 100.00%
Total 82 100.00% 1 100.00%

/*
 * 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;

	acerhdf_check_param(thermal);

	err = acerhdf_get_temp(&temp);
	if (err)
		return err;

	if (verbose)
		pr_notice("temp %d\n", temp);

	*t = temp;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 60 98.36% 1 50.00%
Sascha Hauer 1 1.64% 1 50.00%
Total 61 100.00% 2 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 51 89.47% 1 33.33%
Rui Zhang 4 7.02% 1 33.33%
Kapileshwar Singh 2 3.51% 1 33.33%
Total 57 100.00% 3 100.00%



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;
}

Contributors
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Peter Feuerer 50 100.00% 1 100.00%
Total 50 100.00% 1 100.00%



static inline void acerhdf_revert_to_bios_mode(void)
{
	acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
	kernelmode = 0;
	if (thz_dev)
		thz_dev->polling_delay = 0;
	pr_notice("kernel mode fan control OFF\n");
}
Contributors
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Peter Feuerer 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



static inline void acerhdf_enable_kernelmode(void)
{
	kernelmode = 1;

	thz_dev->polling_delay = interval*1000;
	thermal_zone_device_update(thz_dev, THERMAL_EVENT_UNSPECIFIED);
	pr_notice("kernel mode fan control ON\n");
}

Contributors
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Peter Feuerer 31 93.94% 1 50.00%
Srinivas Pandruvada 2 6.06% 1 50.00%
Total 33 100.00% 2 100.00%



static int acerhdf_get_mode(struct thermal_zone_device *thermal,
			    enum thermal_device_mode *mode)
{
	if (verbose)
		pr_notice("kernel mode fan control %d\n", kernelmode);

	*mode = (kernelmode) ? THERMAL_DEVICE_ENABLED
			     : THERMAL_DEVICE_DISABLED;

	return 0;
}

Contributors
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Peter Feuerer 41 100.00% 1 100.00%
Total 41 100.00% 1 100.00%

/*
 * 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_set_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;
}

Contributors
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Peter Feuerer 42 100.00% 1 100.00%
Total 42 100.00% 1 100.00%



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;
}

Contributors
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Peter Feuerer 50 100.00% 2 100.00%
Total 50 100.00% 2 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 37 97.37% 2 66.67%
Sascha Hauer 1 2.63% 1 33.33%
Total 38 100.00% 3 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 48 97.96% 2 66.67%
Sascha Hauer 1 2.04% 1 33.33%
Total 49 100.00% 3 100.00%



static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal,
				 int *temperature)
{
	*temperature = ACERHDF_TEMP_CRIT;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 22 95.65% 1 50.00%
Sascha Hauer 1 4.35% 1 50.00%
Total 23 100.00% 2 100.00%

/* 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,
	.get_mode = acerhdf_get_mode,
	.set_mode = acerhdf_set_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;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 54 100.00% 1 100.00%
Total 54 100.00% 1 100.00%

/* 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 121 100.00% 1 100.00%
Total 121 100.00% 1 100.00%

/* bind fan callbacks to fan device */

static 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 31 96.88% 1 50.00%
Borislav Petkov 1 3.12% 1 50.00%
Total 32 100.00% 2 100.00%



static int acerhdf_probe(struct platform_device *device)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 14 100.00% 1 100.00%
Total 14 100.00% 1 100.00%



static int acerhdf_remove(struct platform_device *device)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 14 100.00% 1 100.00%
Total 14 100.00% 1 100.00%


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;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 62 100.00% 1 100.00%
Total 62 100.00% 1 100.00%

/* check hardware */


static int acerhdf_check_hardware(void)
{
	char const *vendor, *version, *product;
	const struct bios_settings *bt = NULL;

	/* 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 (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)) {
			bios_cfg = bt;
			break;
		}
	}

	if (!bios_cfg) {
		pr_err("unknown (unsupported) BIOS version %s/%s/%s, please report, aborting!\n",
		       vendor, product, version);
		return -EINVAL;
	}

	/*
         * 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_zone0/mode\n");
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 216 90.00% 4 66.67%
Rahul Chaturvedi 22 9.17% 1 16.67%
Joe Perches 2 0.83% 1 16.67%
Total 240 100.00% 6 100.00%



static int 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;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 46 52.27% 2 66.67%
Axel Lin 42 47.73% 1 33.33%
Total 88 100.00% 3 100.00%



static void acerhdf_unregister_platform(void)
{
	platform_device_unregister(acerhdf_dev);
	platform_driver_unregister(&acerhdf_driver);
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 18 94.74% 2 66.67%
Axel Lin 1 5.26% 1 33.33%
Total 19 100.00% 3 100.00%



static int acerhdf_register_thermal(void)
{
	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 (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;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 103 97.17% 3 60.00%
Durgadoss R 3 2.83% 2 40.00%
Total 106 100.00% 5 100.00%



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;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 38 100.00% 1 100.00%
Total 38 100.00% 1 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 64 96.97% 1 50.00%
Axel Lin 2 3.03% 1 50.00%
Total 66 100.00% 2 100.00%



static void __exit acerhdf_exit(void)
{
	acerhdf_change_fanstate(ACERHDF_FAN_AUTO);
	acerhdf_unregister_thermal();
	acerhdf_unregister_platform();
}

Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 20 100.00% 1 100.00%
Total 20 100.00% 1 100.00%

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Peter Feuerer");
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*: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);
Overall Contributors
Person Tokens Prop Commits CommitProp
Peter Feuerer 4004 96.11% 17 48.57%
Axel Lin 50 1.20% 2 5.71%
Borislav Petkov 23 0.55% 2 5.71%
Rahul Chaturvedi 22 0.53% 1 2.86%
Julien Valroff 18 0.43% 1 2.86%
Clay Carpenter 18 0.43% 1 2.86%
Stefan Bader 6 0.14% 1 2.86%
Anton V. Boyarshinov 6 0.14% 1 2.86%
Sascha Hauer 4 0.10% 1 2.86%
Rui Zhang 4 0.10% 1 2.86%
Durgadoss R 3 0.07% 2 5.71%
Srinivas Pandruvada 2 0.05% 1 2.86%
Kapileshwar Singh 2 0.05% 1 2.86%
Joe Perches 2 0.05% 1 2.86%
Alexey Dobriyan 1 0.02% 1 2.86%
Jean Delvare 1 0.02% 1 2.86%
Total 4166 100.00% 35 100.00%
Directory: drivers/platform/x86

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Peter Feuerer	39	100.00%	2	100.00%
Total	39	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 drivers/platform/x86/acerhdf.c

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