drivers/misc/msi-laptop.c - kernel/msm-5.4 - Gitiles

 /*-*-linux-c-*-*/

 /*
   Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>

   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., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301, USA.
  */

 /*
  * msi-laptop.c - MSI S270 laptop support. This laptop is sold under
  * various brands, including "Cytron/TCM/Medion/Tchibo MD96100".
  *
  * This driver exports a few files in /sys/devices/platform/msi-laptop-pf/:
  *
  *   lcd_level - Screen brightness: contains a single integer in the
  *   range 0..8. (rw)
  *
  *   auto_brightness - Enable automatic brightness control: contains
  *   either 0 or 1. If set to 1 the hardware adjusts the screen
  *   brightness automatically when the power cord is
  *   plugged/unplugged. (rw)
  *
  *   wlan - WLAN subsystem enabled: contains either 0 or 1. (ro)
  *
  *   bluetooth - Bluetooth subsystem enabled: contains either 0 or 1
  *   Please note that this file is constantly 0 if no Bluetooth
  *   hardware is available. (ro)
  *
  * In addition to these platform device attributes the driver
  * registers itself in the Linux backlight control subsystem and is
  * available to userspace under /sys/class/backlight/msi-laptop-bl/.
  *
  * This driver might work on other laptops produced by MSI. If you
  * want to try it you can pass force=1 as argument to the module which
  * will force it to load even when the DMI data doesn't identify the
  * laptop as MSI S270. YMMV.
  */

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/acpi.h>
 #include <linux/dmi.h>
 #include <linux/backlight.h>
 #include <linux/platform_device.h>
 #include <linux/autoconf.h>

 #define MSI_DRIVER_VERSION "0.5"

 #define MSI_LCD_LEVEL_MAX 9

 #define MSI_EC_COMMAND_WIRELESS 0x10
 #define MSI_EC_COMMAND_LCD_LEVEL 0x11

 static int force;
 module_param(force, bool, 0);
 MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");

 static int auto_brightness;
 module_param(auto_brightness, int, 0);
 MODULE_PARM_DESC(auto_brightness, "Enable automatic brightness control (0: disabled; 1: enabled; 2: don't touch)");

 /* Hardware access */

 static int set_lcd_level(int level)
 {
 	u8 buf[2];

 	if (level < 0 || level >= MSI_LCD_LEVEL_MAX)
 		return -EINVAL;

 	buf[0] = 0x80;
 	buf[1] = (u8) (level*31);

 	return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, buf, sizeof(buf), NULL, 0);
 }

 static int get_lcd_level(void)
 {
 	u8 wdata = 0, rdata;
 	int result;

 	result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, &rdata, 1);
 	if (result < 0)
 		return result;

 	return (int) rdata / 31;
 }

 static int get_auto_brightness(void)
 {
 	u8 wdata = 4, rdata;
 	int result;

 	result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, &rdata, 1);
 	if (result < 0)
 		return result;

 	return !!(rdata & 8);
 }

 static int set_auto_brightness(int enable)
 {
 	u8 wdata[2], rdata;
 	int result;

 	wdata[0] = 4;

 	result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 1, &rdata, 1);
 	if (result < 0)
 		return result;

 	wdata[0] = 0x84;
 	wdata[1] = (rdata & 0xF7) | (enable ? 8 : 0);

 	return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 2, NULL, 0);
 }

 static int get_wireless_state(int *wlan, int *bluetooth)
 {
 	u8 wdata = 0, rdata;
 	int result;

 	result = ec_transaction(MSI_EC_COMMAND_WIRELESS, &wdata, 1, &rdata, 1);
 	if (result < 0)
 		return -1;

 	if (wlan)
 		*wlan = !!(rdata & 8);

 	if (bluetooth)
 		*bluetooth = !!(rdata & 128);

 	return 0;
 }

 /* Backlight device stuff */

 static int bl_get_brightness(struct backlight_device *b)
 {
 	return get_lcd_level();
 }


 static int bl_update_status(struct backlight_device *b)
 {
 	return set_lcd_level(b->props->brightness);
 }

 static struct backlight_properties msibl_props = {
 	.owner		= THIS_MODULE,
 	.get_brightness = bl_get_brightness,
 	.update_status  = bl_update_status,
 	.max_brightness = MSI_LCD_LEVEL_MAX-1,
 };

 static struct backlight_device *msibl_device;

 /* Platform device */

 static ssize_t show_wlan(struct device *dev,
 	struct device_attribute *attr, char *buf)
 {

 	int ret, enabled;

 	ret = get_wireless_state(&enabled, NULL);
 	if (ret < 0)
 		return ret;

 	return sprintf(buf, "%i\n", enabled);
 }

 static ssize_t show_bluetooth(struct device *dev,
 	struct device_attribute *attr, char *buf)
 {

 	int ret, enabled;

 	ret = get_wireless_state(NULL, &enabled);
 	if (ret < 0)
 		return ret;

 	return sprintf(buf, "%i\n", enabled);
 }

 static ssize_t show_lcd_level(struct device *dev,
 	struct device_attribute *attr, char *buf)
 {

 	int ret;

 	ret = get_lcd_level();
 	if (ret < 0)
 		return ret;

 	return sprintf(buf, "%i\n", ret);
 }

 static ssize_t store_lcd_level(struct device *dev,
 	struct device_attribute *attr, const char *buf, size_t count)
 {

 	int level, ret;

 	if (sscanf(buf, "%i", &level) != 1 || (level < 0 || level >= MSI_LCD_LEVEL_MAX))
 		return -EINVAL;

 	ret = set_lcd_level(level);
 	if (ret < 0)
 		return ret;

 	return count;
 }

 static ssize_t show_auto_brightness(struct device *dev,
 	struct device_attribute *attr, char *buf)
 {

 	int ret;

 	ret = get_auto_brightness();
 	if (ret < 0)
 		return ret;

 	return sprintf(buf, "%i\n", ret);
 }

 static ssize_t store_auto_brightness(struct device *dev,
 	struct device_attribute *attr, const char *buf, size_t count)
 {

 	int enable, ret;

 	if (sscanf(buf, "%i", &enable) != 1 || (enable != (enable & 1)))
 		return -EINVAL;

 	ret = set_auto_brightness(enable);
 	if (ret < 0)
 		return ret;

 	return count;
 }

 static DEVICE_ATTR(lcd_level, 0644, show_lcd_level, store_lcd_level);
 static DEVICE_ATTR(auto_brightness, 0644, show_auto_brightness, store_auto_brightness);
 static DEVICE_ATTR(bluetooth, 0444, show_bluetooth, NULL);
 static DEVICE_ATTR(wlan, 0444, show_wlan, NULL);

 static struct attribute *msipf_attributes[] = {
 	&dev_attr_lcd_level.attr,
 	&dev_attr_auto_brightness.attr,
 	&dev_attr_bluetooth.attr,
 	&dev_attr_wlan.attr,
 	NULL
 };

 static struct attribute_group msipf_attribute_group = {
 	.attrs = msipf_attributes
 };

 static struct platform_driver msipf_driver = {
 	.driver = {
 		.name = "msi-laptop-pf",
 		.owner = THIS_MODULE,
 	}
 };

 static struct platform_device *msipf_device;

 /* Initialization */

 static struct dmi_system_id __initdata msi_dmi_table[] = {
 	{
 		.ident = "MSI S270",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "MICRO-STAR INT'L CO.,LTD"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "MS-1013"),
 		}
 	},
 	{
 		.ident = "Medion MD96100",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "NOTEBOOK"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "SAM2000"),
 		}
 	},
 	{ }
 };


 static int __init msi_init(void)
 {
 	int ret;

 	if (acpi_disabled)
 		return -ENODEV;

 	if (!force && !dmi_check_system(msi_dmi_table))
 		return -ENODEV;

 	if (auto_brightness < 0 || auto_brightness > 2)
 		return -EINVAL;

 	/* Register backlight stuff */

 	msibl_device = backlight_device_register("msi-laptop-bl", NULL, NULL,
 						&msibl_props);
 	if (IS_ERR(msibl_device))
 		return PTR_ERR(msibl_device);

 	ret = platform_driver_register(&msipf_driver);
 	if (ret)
 		goto fail_backlight;

 	/* Register platform stuff */

 	msipf_device = platform_device_alloc("msi-laptop-pf", -1);
 	if (!msipf_device) {
 		ret = -ENOMEM;
 		goto fail_platform_driver;
 	}

 	ret = platform_device_add(msipf_device);
 	if (ret)
 		goto fail_platform_device1;

 	ret = sysfs_create_group(&msipf_device->dev.kobj, &msipf_attribute_group);
 	if (ret)
 		goto fail_platform_device2;

 	/* Disable automatic brightness control by default because
 	 * this module was probably loaded to do brightness control in
 	 * software. */

 	if (auto_brightness != 2)
 		set_auto_brightness(auto_brightness);

 	printk(KERN_INFO "msi-laptop: driver "MSI_DRIVER_VERSION" successfully loaded.\n");

 	return 0;

 fail_platform_device2:

 	platform_device_del(msipf_device);

 fail_platform_device1:

 	platform_device_put(msipf_device);

 fail_platform_driver:

 	platform_driver_unregister(&msipf_driver);

 fail_backlight:

 	backlight_device_unregister(msibl_device);

 	return ret;
 }

 static void __exit msi_cleanup(void)
 {

 	sysfs_remove_group(&msipf_device->dev.kobj, &msipf_attribute_group);
 	platform_device_unregister(msipf_device);
 	platform_driver_unregister(&msipf_driver);
 	backlight_device_unregister(msibl_device);

 	/* Enable automatic brightness control again */
 	if (auto_brightness != 2)
 		set_auto_brightness(1);

 	printk(KERN_INFO "msi-laptop: driver unloaded.\n");
 }

 module_init(msi_init);
 module_exit(msi_cleanup);

 MODULE_AUTHOR("Lennart Poettering");
 MODULE_DESCRIPTION("MSI Laptop Support");
 MODULE_VERSION(MSI_DRIVER_VERSION);
 MODULE_LICENSE("GPL");
	/--linux-c--/

	/*
	Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>

	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., 51 Franklin Street, Fifth Floor, Boston, MA
	02110-1301, USA.
	*/

	/*
	* msi-laptop.c - MSI S270 laptop support. This laptop is sold under
	* various brands, including "Cytron/TCM/Medion/Tchibo MD96100".
	*
	* This driver exports a few files in /sys/devices/platform/msi-laptop-pf/:
	*
	* lcd_level - Screen brightness: contains a single integer in the
	* range 0..8. (rw)
	*
	* auto_brightness - Enable automatic brightness control: contains
	* either 0 or 1. If set to 1 the hardware adjusts the screen
	* brightness automatically when the power cord is
	* plugged/unplugged. (rw)
	*
	* wlan - WLAN subsystem enabled: contains either 0 or 1. (ro)
	*
	* bluetooth - Bluetooth subsystem enabled: contains either 0 or 1
	* Please note that this file is constantly 0 if no Bluetooth
	* hardware is available. (ro)
	*
	* In addition to these platform device attributes the driver
	* registers itself in the Linux backlight control subsystem and is
	* available to userspace under /sys/class/backlight/msi-laptop-bl/.
	*
	* This driver might work on other laptops produced by MSI. If you
	* want to try it you can pass force=1 as argument to the module which
	* will force it to load even when the DMI data doesn't identify the
	* laptop as MSI S270. YMMV.
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/acpi.h>
	#include <linux/dmi.h>
	#include <linux/backlight.h>
	#include <linux/platform_device.h>
	#include <linux/autoconf.h>

	#define MSI_DRIVER_VERSION "0.5"

	#define MSI_LCD_LEVEL_MAX 9

	#define MSI_EC_COMMAND_WIRELESS 0x10
	#define MSI_EC_COMMAND_LCD_LEVEL 0x11

	static int force;
	module_param(force, bool, 0);
	MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");

	static int auto_brightness;
	module_param(auto_brightness, int, 0);
	MODULE_PARM_DESC(auto_brightness, "Enable automatic brightness control (0: disabled; 1: enabled; 2: don't touch)");

	/* Hardware access */

	static int set_lcd_level(int level)
	{
	u8 buf[2];

	if (level < 0 \|\| level >= MSI_LCD_LEVEL_MAX)
	return -EINVAL;

	buf[0] = 0x80;
	buf[1] = (u8) (level*31);

	return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, buf, sizeof(buf), NULL, 0);
	}

	static int get_lcd_level(void)
	{
	u8 wdata = 0, rdata;
	int result;

	result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, &rdata, 1);
	if (result < 0)
	return result;

	return (int) rdata / 31;
	}

	static int get_auto_brightness(void)
	{
	u8 wdata = 4, rdata;
	int result;

	result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, &rdata, 1);
	if (result < 0)
	return result;

	return !!(rdata & 8);
	}

	static int set_auto_brightness(int enable)
	{
	u8 wdata[2], rdata;
	int result;

	wdata[0] = 4;

	result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 1, &rdata, 1);
	if (result < 0)
	return result;

	wdata[0] = 0x84;
	wdata[1] = (rdata & 0xF7) \| (enable ? 8 : 0);

	return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 2, NULL, 0);
	}

	static int get_wireless_state(int wlan, int bluetooth)
	{
	u8 wdata = 0, rdata;
	int result;

	result = ec_transaction(MSI_EC_COMMAND_WIRELESS, &wdata, 1, &rdata, 1);
	if (result < 0)
	return -1;

	if (wlan)
	*wlan = !!(rdata & 8);

	if (bluetooth)
	*bluetooth = !!(rdata & 128);

	return 0;
	}

	/* Backlight device stuff */

	static int bl_get_brightness(struct backlight_device *b)
	{
	return get_lcd_level();
	}


	static int bl_update_status(struct backlight_device *b)
	{
	return set_lcd_level(b->props->brightness);
	}

	static struct backlight_properties msibl_props = {
	.owner = THIS_MODULE,
	.get_brightness = bl_get_brightness,
	.update_status = bl_update_status,
	.max_brightness = MSI_LCD_LEVEL_MAX-1,
	};

	static struct backlight_device *msibl_device;

	/* Platform device */

	static ssize_t show_wlan(struct device *dev,
	struct device_attribute attr, char buf)
	{

	int ret, enabled;

	ret = get_wireless_state(&enabled, NULL);
	if (ret < 0)
	return ret;

	return sprintf(buf, "%i\n", enabled);
	}

	static ssize_t show_bluetooth(struct device *dev,
	struct device_attribute attr, char buf)
	{

	int ret, enabled;

	ret = get_wireless_state(NULL, &enabled);
	if (ret < 0)
	return ret;

	return sprintf(buf, "%i\n", enabled);
	}

	static ssize_t show_lcd_level(struct device *dev,
	struct device_attribute attr, char buf)
	{

	int ret;

	ret = get_lcd_level();
	if (ret < 0)
	return ret;

	return sprintf(buf, "%i\n", ret);
	}

	static ssize_t store_lcd_level(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{

	int level, ret;

	if (sscanf(buf, "%i", &level) != 1 \|\| (level < 0 \|\| level >= MSI_LCD_LEVEL_MAX))
	return -EINVAL;

	ret = set_lcd_level(level);
	if (ret < 0)
	return ret;

	return count;
	}

	static ssize_t show_auto_brightness(struct device *dev,
	struct device_attribute attr, char buf)
	{

	int ret;

	ret = get_auto_brightness();
	if (ret < 0)
	return ret;

	return sprintf(buf, "%i\n", ret);
	}

	static ssize_t store_auto_brightness(struct device *dev,
	struct device_attribute attr, const char buf, size_t count)
	{

	int enable, ret;

	if (sscanf(buf, "%i", &enable) != 1 \|\| (enable != (enable & 1)))
	return -EINVAL;

	ret = set_auto_brightness(enable);
	if (ret < 0)
	return ret;

	return count;
	}

	static DEVICE_ATTR(lcd_level, 0644, show_lcd_level, store_lcd_level);
	static DEVICE_ATTR(auto_brightness, 0644, show_auto_brightness, store_auto_brightness);
	static DEVICE_ATTR(bluetooth, 0444, show_bluetooth, NULL);
	static DEVICE_ATTR(wlan, 0444, show_wlan, NULL);

	static struct attribute *msipf_attributes[] = {
	&dev_attr_lcd_level.attr,
	&dev_attr_auto_brightness.attr,
	&dev_attr_bluetooth.attr,
	&dev_attr_wlan.attr,
	NULL
	};

	static struct attribute_group msipf_attribute_group = {
	.attrs = msipf_attributes
	};

	static struct platform_driver msipf_driver = {
	.driver = {
	.name = "msi-laptop-pf",
	.owner = THIS_MODULE,
	}
	};

	static struct platform_device *msipf_device;

	/* Initialization */

	static struct dmi_system_id __initdata msi_dmi_table[] = {
	{
	.ident = "MSI S270",
	.matches = {
	DMI_MATCH(DMI_SYS_VENDOR, "MICRO-STAR INT'L CO.,LTD"),
	DMI_MATCH(DMI_PRODUCT_NAME, "MS-1013"),
	}
	},
	{
	.ident = "Medion MD96100",
	.matches = {
	DMI_MATCH(DMI_SYS_VENDOR, "NOTEBOOK"),
	DMI_MATCH(DMI_PRODUCT_NAME, "SAM2000"),
	}
	},
	{ }
	};


	static int __init msi_init(void)
	{
	int ret;

	if (acpi_disabled)
	return -ENODEV;

	if (!force && !dmi_check_system(msi_dmi_table))
	return -ENODEV;

	if (auto_brightness < 0 \|\| auto_brightness > 2)
	return -EINVAL;

	/* Register backlight stuff */

	msibl_device = backlight_device_register("msi-laptop-bl", NULL, NULL,
	&msibl_props);
	if (IS_ERR(msibl_device))
	return PTR_ERR(msibl_device);

	ret = platform_driver_register(&msipf_driver);
	if (ret)
	goto fail_backlight;

	/* Register platform stuff */

	msipf_device = platform_device_alloc("msi-laptop-pf", -1);
	if (!msipf_device) {
	ret = -ENOMEM;
	goto fail_platform_driver;
	}

	ret = platform_device_add(msipf_device);
	if (ret)
	goto fail_platform_device1;

	ret = sysfs_create_group(&msipf_device->dev.kobj, &msipf_attribute_group);
	if (ret)
	goto fail_platform_device2;

	/* Disable automatic brightness control by default because
	* this module was probably loaded to do brightness control in
	* software. */

	if (auto_brightness != 2)
	set_auto_brightness(auto_brightness);

	printk(KERN_INFO "msi-laptop: driver "MSI_DRIVER_VERSION" successfully loaded.\n");

	return 0;

	fail_platform_device2:

	platform_device_del(msipf_device);

	fail_platform_device1:

	platform_device_put(msipf_device);

	fail_platform_driver:

	platform_driver_unregister(&msipf_driver);

	fail_backlight:

	backlight_device_unregister(msibl_device);

	return ret;
	}

	static void __exit msi_cleanup(void)
	{

	sysfs_remove_group(&msipf_device->dev.kobj, &msipf_attribute_group);
	platform_device_unregister(msipf_device);
	platform_driver_unregister(&msipf_driver);
	backlight_device_unregister(msibl_device);

	/* Enable automatic brightness control again */
	if (auto_brightness != 2)
	set_auto_brightness(1);

	printk(KERN_INFO "msi-laptop: driver unloaded.\n");
	}

	module_init(msi_init);
	module_exit(msi_cleanup);

	MODULE_AUTHOR("Lennart Poettering");
	MODULE_DESCRIPTION("MSI Laptop Support");
	MODULE_VERSION(MSI_DRIVER_VERSION);
	MODULE_LICENSE("GPL");