asus_acpi.c

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/*
 *  asus_acpi.c - Asus Laptop ACPI Extras
 *
 *
 *  Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 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.
 *  �ic Burghard  - LED display support for W1N
 *
 */

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

#define ASUS_ACPI_VERSION "0.30"

#define PROC_ASUS       "asus"	//the directory
#define PROC_MLED       "mled"
#define PROC_WLED       "wled"
#define PROC_TLED       "tled"
#define PROC_BT         "bluetooth"
#define PROC_LEDD       "ledd"
#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"

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

/*
 * Flags for hotk status
 */
#define MLED_ON     0x01	//mail LED
#define WLED_ON     0x02	//wireless LED
#define TLED_ON     0x04	//touchpad LED
#define BT_ON       0x08	//internal Bluetooth

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(asus_uid, "UID for entries in /proc/acpi/asus.\n");
module_param(asus_gid, uint, 0);
MODULE_PARM_DESC(asus_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_ledd;		//method to handle LED display______R
	char *mt_bt_switch;	//method to switch Bluetooth on/off_R
	char *bt_status;	//no model currently supports this__?
	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, ...
	u32 ledd_status;	//status of the LED display
	struct model_data *methods;	//methods available on the laptop
	u8 brightness;		//brightness level
	enum {
		A1x = 0,	//A1340D, A1300F
		A2x,		//A2500H
		A4G,		//A4700G
		D1x,		//D1
		L2D,		//L2000D
		L3C,		//L3800C
		L3D,		//L3400D
		L3H,		//L3H, L2000E, L5D
		L4R,		//L4500R
		L5x,		//L5800C 
		L8L,		//L8400L
		M1A,		//M1300A
		M2E,		//M2400E, L4400L
		M6N,		//M6800N, W3400N
		M6R,		//M6700R, A3000G
		P30,		//Samsung P30
		S1x,		//S1300A, but also L1400B and M2400A (L84F)
		S2x,		//S200 (J1 reported), Victor MP-XP7210
		W1N,		//W1000N
		W5A,		//W5A
		W3V,            //W3030V
		xxN,		//M2400N, M3700N, M5200N, M6800N, S1300N, S5200N
		A4S,            //Z81sp
		//(Centrino)
		END_MODEL
	} model;		//Models currently supported
	u16 event_count[128];	//count for each event TODO make this better
};

/* Here we go */
#define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
#define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
#define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
#define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
#define S1x_PREFIX "\\_SB.PCI0.PX40."
#define S2x_PREFIX A1x_PREFIX
#define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."

static struct model_data model_conf[END_MODEL] = {
	/*
	 * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
	 * it seems to be a kind of switch, but what for ?
	 */

	{
	 .name = "A1x",
	 .mt_mled = "MLED",
	 .mled_status = "\\MAIL",
	 .mt_lcd_switch = A1x_PREFIX "_Q10",
	 .lcd_status = "\\BKLI",
	 .brightness_up = A1x_PREFIX "_Q0E",
	 .brightness_down = A1x_PREFIX "_Q0F"},

	{
	 .name = "A2x",
	 .mt_mled = "MLED",
	 .mt_wled = "WLED",
	 .wled_status = "\\SG66",
	 .mt_lcd_switch = "\\Q10",
	 .lcd_status = "\\BAOF",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\INFB"},

	{
	 .name = "A4G",
	 .mt_mled = "MLED",
/* WLED present, but not controlled by ACPI */
	 .mt_lcd_switch = xxN_PREFIX "_Q10",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\ADVG"},

	{
	 .name = "D1x",
	 .mt_mled = "MLED",
	 .mt_lcd_switch = "\\Q0D",
	 .lcd_status = "\\GP11",
	 .brightness_up = "\\Q0C",
	 .brightness_down = "\\Q0B",
	 .brightness_status = "\\BLVL",
	 .display_set = "SDSP",
	 .display_get = "\\INFB"},

	{
	 .name = "L2D",
	 .mt_mled = "MLED",
	 .mled_status = "\\SGP6",
	 .mt_wled = "WLED",
	 .wled_status = "\\RCP3",
	 .mt_lcd_switch = "\\Q10",
	 .lcd_status = "\\SGP0",
	 .brightness_up = "\\Q0E",
	 .brightness_down = "\\Q0F",
	 .display_set = "SDSP",
	 .display_get = "\\INFB"},

	{
	 .name = "L3C",
	 .mt_mled = "MLED",
	 .mt_wled = "WLED",
	 .mt_lcd_switch = L3C_PREFIX "_Q10",
	 .lcd_status = "\\GL32",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},

	{
	 .name = "L3D",
	 .mt_mled = "MLED",
	 .mled_status = "\\MALD",
	 .mt_wled = "WLED",
	 .mt_lcd_switch = "\\Q10",
	 .lcd_status = "\\BKLG",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\INFB"},

	{
	 .name = "L3H",
	 .mt_mled = "MLED",
	 .mt_wled = "WLED",
	 .mt_lcd_switch = "EHK",
	 .lcd_status = "\\_SB.PCI0.PM.PBC",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\INFB"},

	{
	 .name = "L4R",
	 .mt_mled = "MLED",
	 .mt_wled = "WLED",
	 .wled_status = "\\_SB.PCI0.SBRG.SG13",
	 .mt_lcd_switch = xxN_PREFIX "_Q10",
	 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},

	{
	 .name = "L5x",
	 .mt_mled = "MLED",
/* WLED present, but not controlled by ACPI */
	 .mt_tled = "TLED",
	 .mt_lcd_switch = "\\Q0D",
	 .lcd_status = "\\BAOF",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\INFB"},

	{
	 .name = "L8L"
/* No features, but at least support the hotkeys */
	 },

	{
	 .name = "M1A",
	 .mt_mled = "MLED",
	 .mt_lcd_switch = M1A_PREFIX "Q10",
	 .lcd_status = "\\PNOF",
	 .brightness_up = M1A_PREFIX "Q0E",
	 .brightness_down = M1A_PREFIX "Q0F",
	 .brightness_status = "\\BRIT",
	 .display_set = "SDSP",
	 .display_get = "\\INFB"},

	{
	 .name = "M2E",
	 .mt_mled = "MLED",
	 .mt_wled = "WLED",
	 .mt_lcd_switch = "\\Q10",
	 .lcd_status = "\\GP06",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\INFB"},

	{
	 .name = "M6N",
	 .mt_mled = "MLED",
	 .mt_wled = "WLED",
	 .wled_status = "\\_SB.PCI0.SBRG.SG13",
	 .mt_lcd_switch = xxN_PREFIX "_Q10",
	 .lcd_status = "\\_SB.BKLT",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\SSTE"},

	{
	 .name = "M6R",
	 .mt_mled = "MLED",
	 .mt_wled = "WLED",
	 .mt_lcd_switch = xxN_PREFIX "_Q10",
	 .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},

	{
	 .name = "P30",
	 .mt_wled = "WLED",
	 .mt_lcd_switch = P30_PREFIX "_Q0E",
	 .lcd_status = "\\BKLT",
	 .brightness_up = P30_PREFIX "_Q68",
	 .brightness_down = P30_PREFIX "_Q69",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\DNXT"},

	{
	 .name = "S1x",
	 .mt_mled = "MLED",
	 .mled_status = "\\EMLE",
	 .mt_wled = "WLED",
	 .mt_lcd_switch = S1x_PREFIX "Q10",
	 .lcd_status = "\\PNOF",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV"},

	{
	 .name = "S2x",
	 .mt_mled = "MLED",
	 .mled_status = "\\MAIL",
	 .mt_lcd_switch = S2x_PREFIX "_Q10",
	 .lcd_status = "\\BKLI",
	 .brightness_up = S2x_PREFIX "_Q0B",
	 .brightness_down = S2x_PREFIX "_Q0A"},

	{
	 .name = "W1N",
	 .mt_mled = "MLED",
	 .mt_wled = "WLED",
	 .mt_ledd = "SLCM",
	 .mt_lcd_switch = xxN_PREFIX "_Q10",
	 .lcd_status = "\\BKLT",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\ADVG"},

	{
	 .name = "W5A",
	 .mt_bt_switch = "BLED",
	 .mt_wled = "WLED",
	 .mt_lcd_switch = xxN_PREFIX "_Q10",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\ADVG"},

	{
	 .name = "W3V",
	 .mt_mled = "MLED",
	 .mt_wled = "WLED",
	 .mt_lcd_switch = xxN_PREFIX "_Q10",
	 .lcd_status = "\\BKLT",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	 .display_get = "\\INFB"},

       {
	 .name = "xxN",
	 .mt_mled = "MLED",
/* WLED present, but not controlled by ACPI */
	 .mt_lcd_switch = xxN_PREFIX "_Q10",
	 .lcd_status = "\\BKLT",
	 .brightness_set = "SPLV",
	 .brightness_get = "GPLV",
	 .display_set = "SDSP",
	.display_get = "\\ADVG"},

	{
		.name              = "A4S",
		.brightness_set    = "SPLV",
		.brightness_get    = "GPLV",
		.mt_bt_switch      = "BLED",
		.mt_wled           = "WLED"
	}

};

/* procdir we use */
static struct proc_dir_entry *asus_proc_dir;

static struct backlight_device *asus_backlight_device;

/*
 * This header is made available to allow proper configuration given model,
 * revision number , ... this info cannot go in struct asus_hotk because it is
 * available before the hotk
 */
static struct acpi_table_header *asus_info;

/* The actual device the driver binds to */
static struct asus_hotk *hotk;

/*
 * The hotkey driver and autoloading declaration
 */
static int asus_hotk_add(struct acpi_device *device);
static int asus_hotk_remove(struct acpi_device *device, int type);
static const struct acpi_device_id asus_device_ids[] = {
	{"ATK0100", 0},
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, asus_device_ids);

static struct acpi_driver asus_hotk_driver = {
	.name = "asus_acpi",
	.class = ACPI_HOTK_CLASS,
	.ids = asus_device_ids,
	.ops = {
		.add = asus_hotk_add,
		.remove = asus_hotk_remove,
		},
};

/* 
 * This function evaluates an ACPI method, given an int as parameter, the
 * method is searched within the scope of the handle, can be NULL. The output
 * of the method is written is output, which can also be NULL
 *
 * returns 1 if write is successful, 0 else. 
 */
static int write_acpi_int(acpi_handle handle, const char *method, int val,
			  struct acpi_buffer *output)
{
	struct acpi_object_list params;	//list of input parameters (an int here)
	union acpi_object in_obj;	//the only param we use
	acpi_status status;

	params.count = 1;
	params.pointer = &in_obj;
	in_obj.type = ACPI_TYPE_INTEGER;
	in_obj.integer.value = val;

	status = acpi_evaluate_object(handle, (char *)method, &params, output);
	return (status == AE_OK);
}

static int read_acpi_int(acpi_handle handle, const char *method, int *val)
{
	struct acpi_buffer output;
	union acpi_object out_obj;
	acpi_status status;