ACPI: move wmi, asus_acpi, toshiba_acpi to drivers/platform/x86

These are platform specific drivers that happen to use ACPI,
while drivers/acpi/ is for code that implements ACPI itself.

Signed-off-by: Len Brown <len.brown@intel.com>

5 files changed, 3158 insertions, 0 deletions

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 0a9a5b9440a..31f3ce2ac01 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -287,4 +287,89 @@ config EEEPC_LAPTOP
 
 	  If you have an Eee PC laptop, say Y or M here.
 
+
+config ACPI_WMI
+	tristate "WMI (EXPERIMENTAL)"
+	depends on ACPI
+	depends on EXPERIMENTAL
+	help
+	  This driver adds support for the ACPI-WMI (Windows Management
+	  Instrumentation) mapper device (PNP0C14) found on some systems.
+
+	  ACPI-WMI is a proprietary extension to ACPI to expose parts of the
+	  ACPI firmware to userspace - this is done through various vendor
+	  defined methods and data blocks in a PNP0C14 device, which are then
+	  made available for userspace to call.
+
+	  The implementation of this in Linux currently only exposes this to
+	  other kernel space drivers.
+
+	  This driver is a required dependency to build the firmware specific
+	  drivers needed on many machines, including Acer and HP laptops.
+
+	  It is safe to enable this driver even if your DSDT doesn't define
+	  any ACPI-WMI devices.
+
+config ACPI_ASUS
+	tristate "ASUS/Medion Laptop Extras"
+	depends on ACPI
+	select BACKLIGHT_CLASS_DEVICE
+	---help---
+	  This driver provides support for extra features of ACPI-compatible
+	  ASUS laptops. As some of Medion laptops are made by ASUS, it may also
+	  support some Medion laptops (such as 9675 for example).  It makes all
+	  the extra buttons generate standard ACPI events that go through
+	  /proc/acpi/events, and (on some models) adds support for changing the
+	  display brightness and output, switching the LCD backlight on and off,
+	  and most importantly, allows you to blink those fancy LEDs intended
+	  for reporting mail and wireless status.
+
+	  Note: display switching code is currently considered EXPERIMENTAL,
+	  toying with these values may even lock your machine.
+
+	  All settings are changed via /proc/acpi/asus directory entries. Owner
+	  and group for these entries can be set with asus_uid and asus_gid
+	  parameters.
+
+	  More information and a userspace daemon for handling the extra buttons
+	  at <http://sourceforge.net/projects/acpi4asus/>.
+
+	  If you have an ACPI-compatible ASUS laptop, say Y or M here. This
+	  driver is still under development, so if your laptop is unsupported or
+	  something works not quite as expected, please use the mailing list
+	  available on the above page (acpi4asus-user@lists.sourceforge.net).
+
+	  NOTE: This driver is deprecated and will probably be removed soon,
+	  use asus-laptop instead.
+
+config ACPI_TOSHIBA
+	tristate "Toshiba Laptop Extras"
+	depends on ACPI
+	depends on INPUT
+	select INPUT_POLLDEV
+	select NET
+	select RFKILL
+	select BACKLIGHT_CLASS_DEVICE
+	---help---
+	  This driver adds support for access to certain system settings
+	  on "legacy free" Toshiba laptops.  These laptops can be recognized by
+	  their lack of a BIOS setup menu and APM support.
+
+	  On these machines, all system configuration is handled through the
+	  ACPI.  This driver is required for access to controls not covered
+	  by the general ACPI drivers, such as LCD brightness, video output,
+	  etc.
+
+	  This driver differs from the non-ACPI Toshiba laptop driver (located
+	  under "Processor type and features") in several aspects.
+	  Configuration is accessed by reading and writing text files in the
+	  /proc tree instead of by program interface to /dev.  Furthermore, no
+	  power management functions are exposed, as those are handled by the
+	  general ACPI drivers.
+
+	  More information about this driver is available at
+	  <http://memebeam.org/toys/ToshibaAcpiDriver>.
+
+	  If you have a legacy free Toshiba laptop (such as the Libretto L1
+	  series), say Y.
 endif # X86_PLATFORM_DEVICES
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 4d26b1bf22a..1e9de2ae0de 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -14,3 +14,6 @@ obj-$(CONFIG_THINKPAD_ACPI)	+= thinkpad_acpi.o
 obj-$(CONFIG_FUJITSU_LAPTOP)	+= fujitsu-laptop.o
 obj-$(CONFIG_PANASONIC_LAPTOP)	+= panasonic-laptop.o
 obj-$(CONFIG_INTEL_MENLOW)	+= intel_menlow.o
+obj-$(CONFIG_ACPI_WMI)		+= wmi.o
+obj-$(CONFIG_ACPI_ASUS)		+= asus_acpi.o
+obj-$(CONFIG_ACPI_TOSHIBA)	+= toshiba_acpi.o
diff --git a/drivers/platform/x86/asus_acpi.c b/drivers/platform/x86/asus_acpi.c
new file mode 100644
index 00000000000..1e74988c7b2
--- /dev/null
+++ b/drivers/platform/x86/asus_acpi.c
@@ -0,0 +1,1460 @@
+/*
+ *  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");
+module_param(asus_gid, uint, 0);
+MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus");
+
+/* 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;	/* method to set brightness down ____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 */
+		F3Sa,		/* (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"
+	},
+
+	{
+		.name		= "F3Sa",
+		.mt_bt_switch	= "BLED",
+		.mt_wled	= "WLED",
+		.mt_mled	= "MLED",
+		.brightness_get	= "GPLV",
+		.brightness_set	= "SPLV",
+		.mt_lcd_switch	= "\\_SB.PCI0.SBRG.EC0._Q10",
+		.lcd_status	= "\\_SB.PCI0.SBRG.EC0.RPIN",
+		.display_get	= "\\ADVG",
+		.display_set	= "SDSP",
+	},
+
+};
+
+/* 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 (int) */
+	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;
+
+	output.length = sizeof(out_obj);
+	output.pointer = &out_obj;
+
+	status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
+	*val = out_obj.integer.value;
+	return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
+}
+
+/*
+ * We write our info in page, we begin at offset off and cannot write more
+ * than count bytes. We set eof to 1 if we handle those 2 values. We return the
+ * number of bytes written in page
+ */
+static int
+proc_read_info(char *page, char **start, off_t off, int count, int *eof,
+	       void *data)
+{
+	int len = 0;
+	int temp;
+	char buf[16];		/* enough for all info */
+	/*
+	 * We use the easy way, we don't care of off and count,
+	 * so we don't set eof to 1
+	 */
+
+	len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
+	len += sprintf(page + len, "Model reference    : %s\n",
+		       hotk->methods->name);
+	/*
+	 * The SFUN method probably allows the original driver to get the list
+	 * of features supported by a given model. For now, 0x0100 or 0x0800
+	 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
+	 * The significance of others is yet to be found.
+	 */
+	if (read_acpi_int(hotk->handle, "SFUN", &temp))
+		len +=
+		    sprintf(page + len, "SFUN value         : 0x%04x\n", temp);
+	/*
+	 * Another value for userspace: the ASYM method returns 0x02 for
+	 * battery low and 0x04 for battery critical, its readings tend to be
+	 * more accurate than those provided by _BST.
+	 * Note: since not all the laptops provide this method, errors are
+	 * silently ignored.
+	 */
+	if (read_acpi_int(hotk->handle, "ASYM", &temp))
+		len +=
+		    sprintf(page + len, "ASYM value         : 0x%04x\n", temp);
+	if (asus_info) {
+		snprintf(buf, 16, "%d", asus_info->length);
+		len += sprintf(page + len, "DSDT length        : %s\n", buf);
+		snprintf(buf, 16, "%d", asus_info->checksum);
+		len += sprintf(page + len, "DSDT checksum      : %s\n", buf);
+		snprintf(buf, 16, "%d", asus_info->revision);
+		len += sprintf(page + len, "DSDT revision      : %s\n", buf);
+		snprintf(buf, 7, "%s", asus_info->oem_id);
+		len += sprintf(page + len, "OEM id             : %s\n", buf);
+		snprintf(buf, 9, "%s", asus_info->oem_table_id);
+		len += sprintf(page + len, "OEM table id       : %s\n", buf);
+		snprintf(buf, 16, "%x", asus_info->oem_revision);
+		len += sprintf(page + len, "OEM revision       : 0x%s\n", buf);
+		snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
+		len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
+		snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
+		len += sprintf(page + len, "ASL comp revision  : 0x%s\n", buf);
+	}
+
+	return len;
+}
+
+/*
+ * /proc handlers
+ * We write our info in page, we begin at offset off and cannot write more
+ * than count bytes. We set eof to 1 if we handle those 2 values. We return the
+ * number of bytes written in page
+ */
+
+/* Generic LED functions */
+static int read_led(const char *ledname, int ledmask)
+{
+	if (ledname) {
+		int led_status;
+
+		if (read_acpi_int(NULL, ledname, &led_status))
+			return led_status;
+		else
+			printk(KERN_WARNING "Asus ACPI: Error reading LED "
+			       "status\n");
+	}
+	return (hotk->status & ledmask) ? 1 : 0;
+}
+
+static int parse_arg(const char __user *buf, unsigned long count, int *val)
+{
+	char s[32];
+	if (!count)
+		return 0;
+	if (count > 31)
+		return -EINVAL;
+	if (copy_from_user(s, buf, count))
+		return -EFAULT;
+	s[count] = 0;
+	if (sscanf(s, "%i", val) != 1)
+		return -EINVAL;
+	return count;
+}
+
+/* FIXME: kill extraneous args so it can be called independently */
+static int
+write_led(const char __user *buffer, unsigned long count,
+	  char *ledname, int ledmask, int invert)
+{
+	int rv, value;
+	int led_out = 0;
+
+	rv = parse_arg(buffer, count, &value);
+	if (rv > 0)
+		led_out = value ? 1 : 0;
+
+	hotk->status =
+	    (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
+
+	if (invert)		/* invert target value */
+		led_out = !led_out;
+
+	if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
+		printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
+		       ledname);
+
+	return rv;
+}
+
+/*
+ * Proc handlers for MLED
+ */
+static int
+proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
+	       void *data)
+{
+	return sprintf(page, "%d\n",
+		       read_led(hotk->methods->mled_status, MLED_ON));
+}
+
+static int
+proc_write_mled(struct file *file, const char __user *buffer,
+		unsigned long count, void *data)
+{
+	return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
+}
+
+/*
+ * Proc handlers for LED display
+ */
+static int
+proc_read_ledd(char *page, char **start, off_t off, int count, int *eof,
+	       void *data)
+{
+	return sprintf(page, "0x%08x\n", hotk->ledd_status);
+}
+
+static int
+proc_write_ledd(struct file *file, const char __user *buffer,
+		unsigned long count, void *data)
+{
+	int rv, value;
+
+	rv = parse_arg(buffer, count, &value);
+	if (rv > 0) {
+		if (!write_acpi_int
+		    (hotk->handle, hotk->methods->mt_ledd, value, NULL))
+			printk(KERN_WARNING
+			       "Asus ACPI: LED display write failed\n");
+		else
+			hotk->ledd_status = (u32) value;
+	}
+	return rv;
+}
+
+/*
+ * Proc handlers for WLED
+ */
+static int
+proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
+	       void *data)
+{
+	return sprintf(page, "%d\n",
+		       read_led(hotk->methods->wled_status, WLED_ON));
+}
+
+static int
+proc_write_wled(struct file *file, const char __user *buffer,
+		unsigned long count, void *data)
+{
+	return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
+}
+
+/*
+ * Proc handlers for Bluetooth
+ */
+static int
+proc_read_bluetooth(char *page, char **start, off_t off, int count, int *eof,
+		    void *data)
+{
+	return sprintf(page, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
+}
+
+static int
+proc_write_bluetooth(struct file *file, const char __user *buffer,
+		     unsigned long count, void *data)
+{
+	/* Note: mt_bt_switch controls both internal Bluetooth adapter's
+	   presence and its LED */
+	return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
+}
+
+/*
+ * Proc handlers for TLED
+ */
+static int
+proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
+	       void *data)
+{
+	return sprintf(page, "%d\n",
+		       read_led(hotk->methods->tled_status, TLED_ON));
+}
+
+static int
+proc_write_tled(struct file *file, const char __user *buffer,
+		unsigned long count, void *data)
+{
+	return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
+}
+
+static int get_lcd_state(void)
+{
+	int lcd = 0;
+
+	if (hotk->model == L3H) {
+		/* L3H and the like have to be handled differently */
+		acpi_status status = 0;
+		struct acpi_object_list input;
+		union acpi_object mt_params[2];
+		struct acpi_buffer output;
+		union acpi_object out_obj;
+
+		input.count = 2;
+		input.pointer = mt_params;
+		/* Note: the following values are partly guessed up, but
+		   otherwise they seem to work */
+		mt_params[0].type = ACPI_TYPE_INTEGER;
+		mt_params[0].integer.value = 0x02;
+		mt_params[1].type = ACPI_TYPE_INTEGER;
+		mt_params[1].integer.value = 0x02;
+
+		output.length = sizeof(out_obj);
+		output.pointer = &out_obj;
+
+		status =
+		    acpi_evaluate_object(NULL, hotk->methods->lcd_status,
+					 &input, &output);
+		if (status != AE_OK)
+			return -1;
+		if (out_obj.type == ACPI_TYPE_INTEGER)
+			/* That's what the AML code does */
+			lcd = out_obj.integer.value >> 8;
+	} else if (hotk->model == F3Sa) {
+		unsigned long long tmp;
+		union acpi_object param;
+		struct acpi_object_list input;
+		acpi_status status;
+
+		/* Read pin 11 */
+		param.type = ACPI_TYPE_INTEGER;
+		param.integer.value = 0x11;
+		input.count = 1;
+		input.pointer = &param;
+
+		status = acpi_evaluate_integer(NULL, hotk->methods->lcd_status,
+						&input, &tmp);
+		if (status != AE_OK)
+			return -1;
+
+		lcd = tmp;
+	} else {
+		/* We don't have to check anything if we are here */
+		if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
+			printk(KERN_WARNING
+			       "Asus ACPI: Error reading LCD status\n");
+
+		if (hotk->model == L2D)
+			lcd = ~lcd;
+	}
+
+	return (lcd & 1);
+}
+
+static int set_lcd_state(int value)
+{
+	int lcd = 0;
+	acpi_status status = 0;
+
+	lcd = value ? 1 : 0;
+	if (lcd != get_lcd_state()) {
+		/* switch */
+		if (hotk->model != L3H) {
+			status =
+			    acpi_evaluate_object(NULL,
+						 hotk->methods->mt_lcd_switch,
+						 NULL, NULL);
+		} else {
+			/* L3H and the like must be handled differently */
+			if (!write_acpi_int
+			    (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
+			     NULL))
+				status = AE_ERROR;
+			/* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
+			   the exact behaviour is simulated here */
+		}
+		if (ACPI_FAILURE(status))
+			printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
+	}
+	return 0;
+
+}
+
+static int
+proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
+	      void *data)
+{
+	return sprintf(page, "%d\n", get_lcd_state());
+}
+
+static int
+proc_write_lcd(struct file *file, const char __user *buffer,
+	       unsigned long count, void *data)
+{
+	int rv, value;
+
+	rv = parse_arg(buffer, count, &value);
+	if (rv > 0)
+		set_lcd_state(value);
+	return rv;
+}
+
+static int read_brightness(struct backlight_device *bd)
+{
+	int value;
+
+	if (hotk->methods->brightness_get) {	/* SPLV/GPLV laptop */
+		if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
+				   &value))
+			printk(KERN_WARNING
+			       "Asus ACPI: Error reading brightness\n");
+	} else if (hotk->methods->brightness_status) {	/* For D1 for example */
+		if (!read_acpi_int(NULL, hotk->methods->brightness_status,
+				   &value))
+			printk(KERN_WARNING
+			       "Asus ACPI: Error reading brightness\n");
+	} else			/* No GPLV method */
+		value = hotk->brightness;
+	return value;
+}
+
+/*
+ * Change the brightness level
+ */
+static int set_brightness(int value)
+{
+	acpi_status status = 0;
+	int ret = 0;
+
+	/* SPLV laptop */
+	if (hotk->methods->brightness_set) {
+		if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
+				    value, NULL))
+			printk(KERN_WARNING
+			       "Asus ACPI: Error changing brightness\n");
+			ret = -EIO;
+		goto out;
+	}
+
+	/* No SPLV method if we are here, act as appropriate */
+	value -= read_brightness(NULL);
+	while (value != 0) {
+		status = acpi_evaluate_object(NULL, (value > 0) ?
+					      hotk->methods->brightness_up :
+					      hotk->methods->brightness_down,
+					      NULL, NULL);
+		(value > 0) ? value-- : value++;
+		if (ACPI_FAILURE(status))
+			printk(KERN_WARNING
+			       "Asus ACPI: Error changing brightness\n");
+			ret = -EIO;
+	}
+out:
+	return ret;
+}
+
+static int set_brightness_status(struct backlight_device *bd)
+{
+	return set_brightness(bd->props.brightness);
+}
+
+static int
+proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
+	      void *data)
+{
+	return sprintf(page, "%d\n", read_brightness(NULL));
+}
+
+static int
+proc_write_brn(struct file *file, const char __user *buffer,
+	       unsigned long count, void *data)
+{
+	int rv, value;
+
+	rv = parse_arg(buffer, count, &value);
+	if (rv > 0) {
+		value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
+		/* 0 <= value <= 15 */
+		set_brightness(value);
+	}
+	return rv;
+}
+
+static void set_display(int value)
+{
+	/* no sanity check needed for now */
+	if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
+			    value, NULL))
+		printk(KERN_WARNING "Asus ACPI: Error setting display\n");
+	return;
+}
+
+/*
+ * Now, *this* one could be more user-friendly, but so far, no-one has
+ * complained. The significance of bits is the same as in proc_write_disp()
+ */
+static int
+proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
+	       void *data)
+{
+	int value = 0;
+
+	if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
+		printk(KERN_WARNING
+		       "Asus ACPI: Error reading display status\n");
+	value &= 0x07;	/* needed for some models, shouldn't hurt others */
+	return sprintf(page, "%d\n", value);
+}
+
+/*
+ * Experimental support for display switching. As of now: 1 should activate
+ * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
+ * (bitwise) of these will suffice. I never actually tested 3 displays hooked
+ * up simultaneously, so be warned. See the acpi4asus README for more info.
+ */
+static int
+proc_write_disp(struct file *file, const char __user *buffer,
+		unsigned long count, void *data)
+{
+	int rv, value;
+
+	rv = parse_arg(buffer, count, &value);
+	if (rv > 0)
+		set_display(value);
+	return rv;
+}
+
+typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
+			     int *eof, void *data);
+typedef int (proc_writefunc) (struct file *file, const char __user *buffer,
+			      unsigned long count, void *data);
+
+static int
+asus_proc_add(char *name, proc_writefunc *writefunc,
+		     proc_readfunc *readfunc, mode_t mode,
+		     struct acpi_device *device)
+{
+	struct proc_dir_entry *proc =
+	    create_proc_entry(name, mode, acpi_device_dir(device));
+	if (!proc) {
+		printk(KERN_WARNING "  Unable to create %s fs entry\n", name);
+		return -1;
+	}
+	proc->write_proc = writefunc;
+	proc->read_proc = readfunc;
+	proc->data = acpi_driver_data(device);
+	proc->owner = THIS_MODULE;
+	proc->uid = asus_uid;
+	proc->gid = asus_gid;
+	return 0;
+}
+
+static int asus_hotk_add_fs(struct acpi_device *device)
+{
+	struct proc_dir_entry *proc;
+	mode_t mode;
+
+	/*
+	 * If parameter uid or gid is not changed, keep the default setting for
+	 * our