path: root/drivers/acpi/asus_acpi.c

/*
 *  asus_acpi.c - Asus Laptop ACPI Extras
 *
 *
 *  Copyright (C) 2002, 2003, 2004 Julien Lerouge, Karol Kozimor
 *
 *  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
 *
 *
 *  The development page for this driver is located at
 *  http://sourceforge.net/projects/acpi4asus/
 *
 *  Credits:
 *  Pontus Fuchs   - Helper functions, cleanup
 *  Johann Wiesner - Small compile fixes
 *  John Belmonte  - ACPI code for Toshiba laptop was a good starting point.
 *
 *  TODO:
 *  add Fn key status
 *  Add mode selection on module loading (parameter) -> still necessary?
 *  Complete display switching -- may require dirty hacks or calling _DOS?
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <asm/uaccess.h>

#define ASUS_ACPI_VERSION "0.29"

#define PROC_ASUS       "asus"	//the directory
#define PROC_MLED       "mled"
#define PROC_WLED       "wled"
#define PROC_TLED       "tled"
#define PROC_INFO       "info"
#define PROC_LCD        "lcd"
#define PROC_BRN        "brn"
#define PROC_DISP       "disp"

#define ACPI_HOTK_NAME          "Asus Laptop ACPI Extras Driver"
#define ACPI_HOTK_CLASS         "hotkey"
#define ACPI_HOTK_DEVICE_NAME   "Hotkey"
#define ACPI_HOTK_HID           "ATK0100"

/*
 * Some events we use, same for all Asus
 */
#define BR_UP       0x10
#define BR_DOWN     0x20

/*
 * Flags for hotk status
 */
#define MLED_ON     0x01	//is MLED ON ?
#define WLED_ON     0x02
#define TLED_ON     0x04

MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
MODULE_DESCRIPTION(ACPI_HOTK_NAME);
MODULE_LICENSE("GPL");

static uid_t asus_uid;
static gid_t asus_gid;
module_param(asus_uid, uint, 0);
MODULE_PARM_DESC(uid, "UID for entries in /proc/acpi/asus.\n");
module_param(asus_gid, uint, 0);
MODULE_PARM_DESC(gid, "GID for entries in /proc/acpi/asus.\n");

/* For each model, all features implemented, 
 * those marked with R are relative to HOTK, A for absolute */
struct model_data {
	char *name;		//name of the laptop________________A
	char *mt_mled;		//method to handle mled_____________R
	char *mled_status;	//node to handle mled reading_______A
	char *mt_wled;		//method to handle wled_____________R
	char *wled_status;	//node to handle wled reading_______A
	char *mt_tled;		//method to handle tled_____________R
	char *tled_status;	//node to handle tled reading_______A
	char *mt_lcd_switch;	//method to turn LCD ON/OFF_________A
	char *lcd_status;	//node to read LCD panel state______A
	char *brightness_up;	//method to set brightness up_______A
	char *brightness_down;	//guess what ?______________________A
	char *brightness_set;	//method to set absolute brightness_R
	char *brightness_get;	//method to get absolute brightness_R
	char *brightness_status;	//node to get brightness____________A
	char *display_set;	//method to set video output________R
	char *display_get;	//method to get video output________R
};

/*
 * This is the main structure, we can use it to store anything interesting
 * about the hotk device
 */
struct asus_hotk {
	struct acpi_device *device;	//the device we are in
	acpi_handle handle;	//the handle of the hotk device
	char status;		//status of the hotk, for LEDs, ...
	struct model_data *methods;	//methods available on the laptop
	u8 brightness;		//brightness level
	enum {
		A1x = 0,	//A1340D, A1300F
		A2x,		//A2500H
		D1x,		//D1
		L2D,		//L2000D
		L3C,		//L3800C
		L3D,		//L3400D
		L3H,		//L3H, but also L2000E
		L4R,		//L4500R
		L5x,		//L5800C 
		L8L,		//L8400L
		M1A,		//M1300A
		M2E,		//M2400E, L4400L
		M6N,		//M6800N
		M6R,		//M6700R
		P30,		//Samsung P30
		S1x,		//S1300A, but also L1400B and M2400A