Merge branches 'release' and 'wmi-2.6.25' into release

9 files changed, 2186 insertions, 0 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 0885aa2b095a..0819a579005c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -202,6 +202,13 @@ L:	linux-scsi@vger.kernel.org
 W:	http://www.adaptec.com/
 S:	Supported
 
+ACER WMI LAPTOP EXTRAS
+P:	Carlos Corbacho
+M:	carlos@strangeworlds.co.uk
+L:	aceracpi@googlegroups.com (subscribers-only)
+W:	http://code.google.com/p/aceracpi
+S:	Maintained
+
 ACPI
 P:	Len Brown
 M:	len.brown@intel.com
@@ -252,6 +259,13 @@ L:	linux-acpi@vger.kernel.org
 W:	http://acpi.sourceforge.net/
 S:	Supported
 
+ACPI WMI DRIVER
+P:      Carlos Corbacho
+M:      carlos@strangeworlds.co.uk
+L:      linux-acpi@vger.kernel.org
+W:      http://www.lesswatts.org/projects/acpi/
+S:      Maintained
+
 ADM1025 HARDWARE MONITOR DRIVER
 P:	Jean Delvare
 M:	khali@linux-fr.org
@@ -1785,6 +1799,11 @@ P:	Jaroslav Kysela
 M:	perex@perex.cz
 S:	Maintained
 
+HP COMPAQ TC1100 TABLET WMI EXTRAS DRIVER
+P:	Carlos Corbacho
+M:	carlos@strangeworlds.co.uk
+S:	Odd Fixes
+
 HPET:	High Precision Event Timers driver (hpet.c)
 P:	Clemens Ladisch
 M:	clemens@ladisch.de
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 558372957fd3..0065f3794576 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -200,6 +200,16 @@ config ACPI_NUMA
 	depends on (X86 || IA64)
 	default y if IA64_GENERIC || IA64_SGI_SN2
 
+config ACPI_WMI
+	tristate "WMI (EXPERIMENTAL)"
+	depends on EXPERIMENTAL
+	help
+	  This driver adds support for the ACPI-WMI mapper device (PNP0C14)
+	  found on some systems.
+
+	  NOTE: You will need another driver or userspace application on top of
+	  this to actually use anything defined in the ACPI-WMI mapper.
+
 config ACPI_ASUS
         tristate "ASUS/Medion Laptop Extras"
 	depends on X86
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 456446f90077..f29812a86533 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -55,6 +55,7 @@ obj-$(CONFIG_ACPI_THERMAL)	+= thermal.o
 obj-$(CONFIG_ACPI_SYSTEM)	+= system.o event.o
 obj-$(CONFIG_ACPI_DEBUG)	+= debug.o
 obj-$(CONFIG_ACPI_NUMA)		+= numa.o
+obj-$(CONFIG_ACPI_WMI)		+= wmi.o
 obj-$(CONFIG_ACPI_ASUS)		+= asus_acpi.o
 obj-$(CONFIG_ACPI_TOSHIBA)	+= toshiba_acpi.o
 obj-$(CONFIG_ACPI_HOTPLUG_MEMORY)	+= acpi_memhotplug.o
diff --git a/drivers/acpi/wmi.c b/drivers/acpi/wmi.c
new file mode 100644
index 000000000000..36b84ab418dd
--- /dev/null
+++ b/drivers/acpi/wmi.c
@@ -0,0 +1,710 @@
+/*
+ *  ACPI-WMI mapping driver
+ *
+ *  Copyright (C) 2007-2008 Carlos Corbacho <carlos@strangeworlds.co.uk>
+ *
+ *  GUID parsing code from ldm.c is:
+ *   Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
+ *   Copyright (c) 2001-2007 Anton Altaparmakov
+ *   Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/acpi.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+ACPI_MODULE_NAME("wmi");
+MODULE_AUTHOR("Carlos Corbacho");
+MODULE_DESCRIPTION("ACPI-WMI Mapping Driver");
+MODULE_LICENSE("GPL");
+
+#define ACPI_WMI_CLASS "wmi"
+
+#undef PREFIX
+#define PREFIX "ACPI: WMI: "
+
+static DEFINE_MUTEX(wmi_data_lock);
+
+struct guid_block {
+	char guid[16];
+	union {
+		char object_id[2];
+		struct {
+			unsigned char notify_id;
+			unsigned char reserved;
+		};
+	};
+	u8 instance_count;
+	u8 flags;
+};
+
+struct wmi_block {
+	struct list_head list;
+	struct guid_block gblock;
+	acpi_handle handle;
+	wmi_notify_handler handler;
+	void *handler_data;
+};
+
+static struct wmi_block wmi_blocks;
+
+/*
+ * If the GUID data block is marked as expensive, we must enable and
+ * explicitily disable data collection.
+ */
+#define ACPI_WMI_EXPENSIVE   0x1
+#define ACPI_WMI_METHOD      0x2	/* GUID is a method */
+#define ACPI_WMI_STRING      0x4	/* GUID takes & returns a string */
+#define ACPI_WMI_EVENT       0x8	/* GUID is an event */
+
+static int acpi_wmi_remove(struct acpi_device *device, int type);
+static int acpi_wmi_add(struct acpi_device *device);
+
+static const struct acpi_device_id wmi_device_ids[] = {
+	{"PNP0C14", 0},
+	{"pnp0c14", 0},
+	{"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, wmi_device_ids);
+
+static struct acpi_driver acpi_wmi_driver = {
+	.name = "wmi",
+	.class = ACPI_WMI_CLASS,
+	.ids = wmi_device_ids,
+	.ops = {
+		.add = acpi_wmi_add,
+		.remove = acpi_wmi_remove,
+		},
+};
+
+/*
+ * GUID parsing functions
+ */
+
+/**
+ * wmi_parse_hexbyte - Convert a ASCII hex number to a byte
+ * @src:  Pointer to at least 2 characters to convert.
+ *
+ * Convert a two character ASCII hex string to a number.
+ *
+ * Return:  0-255  Success, the byte was parsed correctly
+ *          -1     Error, an invalid character was supplied
+ */
+static int wmi_parse_hexbyte(const u8 *src)
+{
+	unsigned int x; /* For correct wrapping */
+	int h;
+
+	/* high part */
+	x = src[0];
+	if (x - '0' <= '9' - '0') {
+		h = x - '0';
+	} else if (x - 'a' <= 'f' - 'a') {
+		h = x - 'a' + 10;
+	} else if (x - 'A' <= 'F' - 'A') {
+		h = x - 'A' + 10;
+	} else {
+		return -1;
+	}
+	h <<= 4;
+
+	/* low part */
+	x = src[1];
+	if (x - '0' <= '9' - '0')
+		return h | (x - '0');
+	if (x - 'a' <= 'f' - 'a')
+		return h | (x - 'a' + 10);
+	if (x - 'A' <= 'F' - 'A')
+		return h | (x - 'A' + 10);
+	return -1;
+}
+
+/**
+ * wmi_swap_bytes - Rearrange GUID bytes to match GUID binary
+ * @src:   Memory block holding binary GUID (16 bytes)
+ * @dest:  Memory block to hold byte swapped binary GUID (16 bytes)
+ *
+ * Byte swap a binary GUID to match it's real GUID value
+ */
+static void wmi_swap_bytes(u8 *src, u8 *dest)
+{
+	int i;
+
+	for (i = 0; i <= 3; i++)
+		memcpy(dest + i, src + (3 - i), 1);
+
+	for (i = 0; i <= 1; i++)
+		memcpy(dest + 4 + i, src + (5 - i), 1);
+
+	for (i = 0; i <= 1; i++)
+		memcpy(dest + 6 + i, src + (7 - i), 1);
+
+	memcpy(dest + 8, src + 8, 8);
+}
+
+/**
+ * wmi_parse_guid - Convert GUID from ASCII to binary
+ * @src:   36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ * @dest:  Memory block to hold binary GUID (16 bytes)
+ *
+ * N.B. The GUID need not be NULL terminated.
+ *
+ * Return:  'true'   @dest contains binary GUID
+ *          'false'  @dest contents are undefined
+ */
+static bool wmi_parse_guid(const u8 *src, u8 *dest)
+{
+	static const int size[] = { 4, 2, 2, 2, 6 };
+	int i, j, v;
+
+	if (src[8]  != '-' || src[13] != '-' ||
+		src[18] != '-' || src[23] != '-')
+		return false;
+
+	for (j = 0; j < 5; j++, src++) {
+		for (i = 0; i < size[j]; i++, src += 2, *dest++ = v) {
+			v = wmi_parse_hexbyte(src);
+			if (v < 0)
+				return false;
+		}
+	}
+
+	return true;
+}
+
+static bool find_guid(const char *guid_string, struct wmi_block **out)
+{
+	char tmp[16], guid_input[16];
+	struct wmi_block *wblock;
+	struct guid_block *block;
+	struct list_head *p;
+
+	wmi_parse_guid(guid_string, tmp);
+	wmi_swap_bytes(tmp, guid_input);
+
+	list_for_each(p, &wmi_blocks.list) {
+		wblock = list_entry(p, struct wmi_block, list);
+		block = &wblock->gblock;
+
+		if (memcmp(block->guid, guid_input, 16) == 0) {
+			if (out)
+				*out = wblock;
+			return 1;
+		}
+	}
+	return 0;
+}
+
+/*
+ * Exported WMI functions
+ */
+/**
+ * wmi_evaluate_method - Evaluate a WMI method
+ * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ * @instance: Instance index
+ * @method_id: Method ID to call
+ * &in: Buffer containing input for the method call
+ * &out: Empty buffer to return the method results
+ *
+ * Call an ACPI-WMI method
+ */
+acpi_status wmi_evaluate_method(const char *guid_string, u8 instance,
+u32 method_id, const struct acpi_buffer *in, struct acpi_buffer *out)
+{
+	struct guid_block *block = NULL;
+	struct wmi_block *wblock = NULL;
+	acpi_handle handle;
+	acpi_status status;
+	struct acpi_object_list input;
+	union acpi_object params[3];
+	char method[4] = "WM";
+
+	if (!find_guid(guid_string, &wblock))
+		return AE_BAD_ADDRESS;
+
+	block = &wblock->gblock;
+	handle = wblock->handle;
+
+	if (!block->flags & ACPI_WMI_METHOD)
+		return AE_BAD_DATA;
+
+	if (block->instance_count < instance)
+		return AE_BAD_PARAMETER;
+
+	input.count = 2;
+	input.pointer = params;
+	params[0].type = ACPI_TYPE_INTEGER;
+	params[0].integer.value = instance;
+	params[1].type = ACPI_TYPE_INTEGER;
+	params[1].integer.value = method_id;
+
+	if (in) {
+		input.count = 3;
+
+		if (block->flags & ACPI_WMI_STRING) {
+			params[2].type = ACPI_TYPE_STRING;
+		} else {
+			params[2].type = ACPI_TYPE_BUFFER;
+		}
+		params[2].buffer.length = in->length;
+		params[2].buffer.pointer = in->pointer;
+	}
+
+	strncat(method, block->object_id, 2);
+
+	status = acpi_evaluate_object(handle, method, &input, out);
+
+	return status;
+}
+EXPORT_SYMBOL_GPL(wmi_evaluate_method);
+
+/**
+ * wmi_query_block - Return contents of a WMI block
+ * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ * @instance: Instance index
+ * &out: Empty buffer to return the contents of the data block to
+ *
+ * Return the contents of an ACPI-WMI data block to a buffer
+ */
+acpi_status wmi_query_block(const char *guid_string, u8 instance,
+struct acpi_buffer *out)
+{
+	struct guid_block *block = NULL;
+	struct wmi_block *wblock = NULL;
+	acpi_handle handle;
+	acpi_status status, wc_status = AE_ERROR;
+	struct acpi_object_list input, wc_input;
+	union acpi_object wc_params[1], wq_params[1];
+	char method[4];
+	char wc_method[4] = "WC";
+
+	if (!guid_string || !out)
+		return AE_BAD_PARAMETER;
+
+	if (!find_guid(guid_string, &wblock))
+		return AE_BAD_ADDRESS;
+
+	block = &wblock->gblock;
+	handle = wblock->handle;
+
+	if (block->instance_count < instance)
+		return AE_BAD_PARAMETER;
+
+	/* Check GUID is a data block */
+	if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD))
+		return AE_BAD_ADDRESS;
+
+	input.count = 1;
+	input.pointer = wq_params;
+	wq_params[0].type = ACPI_TYPE_INTEGER;
+	wq_params[0].integer.value = instance;
+
+	/*
+	 * If ACPI_WMI_EXPENSIVE, call the relevant WCxx method first to
+	 * enable collection.
+	 */
+	if (block->flags & ACPI_WMI_EXPENSIVE) {
+		wc_input.count = 1;
+		wc_input.pointer = wc_params;
+		wc_params[0].type = ACPI_TYPE_INTEGER;
+		wc_params[0].integer.value = 1;
+
+		strncat(wc_method, block->object_id, 2);
+
+		/*
+		 * Some GUIDs break the specification by declaring themselves
+		 * expensive, but have no corresponding WCxx method. So we
+		 * should not fail if this happens.
+		 */
+		wc_status = acpi_evaluate_object(handle, wc_method,
+			&wc_input, NULL);
+	}
+
+	strcpy(method, "WQ");
+	strncat(method, block->object_id, 2);
+
+	status = acpi_evaluate_object(handle, method, NULL, out);
+
+	/*
+	 * If ACPI_WMI_EXPENSIVE, call the relevant WCxx method, even if
+	 * the WQxx method failed - we should disable collection anyway.
+	 */
+	if ((block->flags & ACPI_WMI_EXPENSIVE) && wc_status) {
+		wc_params[0].integer.value = 0;
+		status = acpi_evaluate_object(handle,
+		wc_method, &wc_input, NULL);
+	}
+
+	return status;
+}
+EXPORT_SYMBOL_GPL(wmi_query_block);
+
+/**
+ * wmi_set_block - Write to a WMI block
+ * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ * @instance: Instance index
+ * &in: Buffer containing new values for the data block
+ *
+ * Write the contents of the input buffer to an ACPI-WMI data block
+ */
+acpi_status wmi_set_block(const char *guid_string, u8 instance,
+const struct acpi_buffer *in)
+{
+	struct guid_block *block = NULL;
+	struct wmi_block *wblock = NULL;
+	acpi_handle handle;
+	struct acpi_object_list input;
+	union acpi_object params[2];
+	char method[4] = "WS";
+
+	if (!guid_string || !in)
+		return AE_BAD_DATA;
+
+	if (!find_guid(guid_string, &wblock))
+		return AE_BAD_ADDRESS;
+
+	block = &wblock->gblock;
+	handle = wblock->handle;
+
+	if (block->instance_count < instance)
+		return AE_BAD_PARAMETER;
+
+	/* Check GUID is a data block */
+	if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD))
+		return AE_BAD_ADDRESS;
+
+	input.count = 2;
+	input.pointer = params;
+	params[0].type = ACPI_TYPE_INTEGER;
+	params[0].integer.value = instance;
+
+	if (block->flags & ACPI_WMI_STRING) {
+		params[1].type = ACPI_TYPE_STRING;
+	} else {
+		params[1].type = ACPI_TYPE_BUFFER;
+	}
+	params[1].buffer.length = in->length;
+	params[1].buffer.pointer = in->pointer;
+
+	strncat(method, block->object_id, 2);
+
+	return acpi_evaluate_object(handle, method, &input, NULL);
+}
+EXPORT_SYMBOL_GPL(wmi_set_block);
+
+/**
+ * wmi_install_notify_handler - Register handler for WMI events
+ * @handler: Function to handle notifications
+ * @data: Data to be returned to handler when event is fired
+ *
+ * Register a handler for events sent to the ACPI-WMI mapper device.
+ */
+acpi_status wmi_install_notify_handler(const char *guid,
+wmi_notify_handler handler, void *data)
+{
+	struct wmi_block *block;
+
+	if (!guid || !handler)
+		return AE_BAD_PARAMETER;
+
+	find_guid(guid, &block);
+	if (!block)
+		return AE_NOT_EXIST;
+
+	if (block->handler)
+		return AE_ALREADY_ACQUIRED;
+
+	block->handler = handler;
+	block->handler_data = data;
+
+	return AE_OK;
+}
+EXPORT_SYMBOL_GPL(wmi_install_notify_handler);
+
+/**
+ * wmi_uninstall_notify_handler - Unregister handler for WMI events
+ *
+ * Unregister handler for events sent to the ACPI-WMI mapper device.
+ */
+acpi_status wmi_remove_notify_handler(const char *guid)
+{
+	struct wmi_block *block;
+
+	if (!guid)
+		return AE_BAD_PARAMETER;
+
+	find_guid(guid, &block);
+	if (!block)
+		return AE_NOT_EXIST;
+
+	if (!block->handler)
+		return AE_NULL_ENTRY;
+
+	block->handler = NULL;
+	block->handler_data = NULL;
+
+	return AE_OK;
+}
+EXPORT_SYMBOL_GPL(wmi_remove_notify_handler);
+
+/**
+ * wmi_get_event_data - Get WMI data associated with an event
+ *
+ * @event - Event to find
+ * &out - Buffer to hold event data
+ *
+ * Returns extra data associated with an event in WMI.
+ */
+acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out)
+{
+	struct acpi_object_list input;
+	union acpi_object params[1];
+	struct guid_block *gblock;
+	struct wmi_block *wblock;
+	struct list_head *p;
+
+	input.count = 1;
+	input.pointer = params;
+	params[0].type = ACPI_TYPE_INTEGER;
+	params[0].integer.value = event;
+
+	list_for_each(p, &wmi_blocks.list) {
+		wblock = list_entry(p, struct wmi_block, list);
+		gblock = &wblock->gblock;
+
+		if ((gblock->flags & ACPI_WMI_EVENT) &&
+			(gblock->notify_id == event))
+			return acpi_evaluate_object(wblock->handle, "_WED",
+				&input, out);
+	}
+
+	return AE_NOT_FOUND;
+}
+EXPORT_SYMBOL_GPL(wmi_get_event_data);
+
+/**
+ * wmi_has_guid - Check if a GUID is available
+ * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ *
+ * Check if a given GUID is defined by _WDG
+ */
+bool wmi_has_guid(const char *guid_string)
+{
+	return find_guid(guid_string, NULL);
+}
+EXPORT_SYMBOL_GPL(wmi_has_guid);
+
+/*
+ * Parse the _WDG method for the GUID data blocks
+ */
+static __init acpi_status parse_wdg(acpi_handle handle)
+{
+	struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
+	union acpi_object *obj;
+	struct guid_block *gblock;
+	struct wmi_block *wblock;
+	acpi_status status;
+	u32 i, total;
+
+	status = acpi_evaluate_object(handle, "_WDG", NULL, &out);
+
+	if (ACPI_FAILURE(status))
+		return status;
+
+	obj = (union acpi_object *) out.pointer;
+
+	if (obj->type != ACPI_TYPE_BUFFER)
+		return AE_ERROR;
+
+	total = obj->buffer.length / sizeof(struct guid_block);
+
+	gblock = kzalloc(obj->buffer.length, GFP_KERNEL);
+	if (!gblock)
+		return AE_NO_MEMORY;
+
+	memcpy(gblock, obj->buffer.pointer, obj->buffer.length);
+
+	for (i = 0; i < total; i++) {
+		wblock = kzalloc(sizeof(struct wmi_block), GFP_KERNEL);
+		if (!wblock)
+			return AE_NO_MEMORY;
+
+		wblock->gblock = gblock[i];
+		wblock->handle = handle;
+		list_add_tail(&wblock->list, &wmi_blocks.list);
+	}
+
+	kfree(out.pointer);
+	kfree(gblock);
+
+	return status;
+}
+
+/*
+ * WMI can have EmbeddedControl access regions. In which case, we just want to
+ * hand these off to the EC driver.
+ */
+static acpi_status
+acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address,
+		      u32 bits, acpi_integer * value,
+		      void *handler_context, void *region_context)
+{
+	int result = 0, i = 0;
+	u8 temp = 0;
+
+	if ((address > 0xFF) || !value)
+		return AE_BAD_PARAMETER;
+
+	if (function != ACPI_READ && function != ACPI_WRITE)
+		return AE_BAD_PARAMETER;
+
+	if (bits != 8)
+		return AE_BAD_PARAMETER;
+
+	if (function == ACPI_READ) {
+		result = ec_read(address, &temp);
+		(*value) |= ((acpi_integer)temp) << i;
+	} else {
+		temp = 0xff & ((*value) >> i);
+		result = ec_write(address, temp);
+	}
+
+	switch (result) {
+	case -EINVAL:
+		return AE_BAD_PARAMETER;
+		break;
+	case -ENODEV:
+		return AE_NOT_FOUND;
+		break;
+	case -ETIME:
+		return AE_TIME;
+		break;
+	default:
+		return AE_OK;
+	}
+}
+
+static void acpi_wmi_notify(acpi_handle handle, u32 event, void *data)
+{
+	struct guid_block *block;
+	struct wmi_block *wblock;
+	struct list_head *p;
+	struct acpi_device *device = data;
+
+	list_for_each(p, &wmi_blocks.list) {
+		wblock = list_entry(p, struct wmi_block, list);
+		block = &wblock->gblock;
+
+		if ((block->flags & ACPI_WMI_EVENT) &&
+			(block->notify_id == event)) {
+			if (wblock->handler)
+				wblock->handler(event, wblock->handler_data);
+
+			acpi_bus_generate_netlink_event(
+				device->pnp.device_class, device->dev.bus_id,
+				event, 0);
+			break;
+		}
+	}
+}
+
+static int acpi_wmi_remove(struct acpi_device *device, int type)
+{
+	acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
+		acpi_wmi_notify);
+
+	acpi_remove_address_space_handler(device->handle,
+				ACPI_ADR_SPACE_EC, &acpi_wmi_ec_space_handler);
+
+	return 0;
+}
+
+static int __init acpi_wmi_add(struct acpi_device *device)
+{
+	acpi_status status;
+	int result = 0;
+
+	status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
+		acpi_wmi_notify, device);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR PREFIX "Error installing notify handler\n");
+		return -ENODEV;
+	}
+
+	status = acpi_install_address_space_handler(device->handle,
+						    ACPI_ADR_SPACE_EC,
+						    &acpi_wmi_ec_space_handler,
+						    NULL, NULL);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
+	status = parse_wdg(device->handle);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR PREFIX "Error installing EC region handler\n");
+		return -ENODEV;
+	}
+
+	return result;
+}
+
+static int __init acpi_wmi_init(void)
+{
+	acpi_status result;
+
+	if (acpi_disabled)
+		return -ENODEV;
+
+	INIT_LIST_HEAD(&wmi_blocks.list);
+
+	result = acpi_bus_register_driver(&acpi_wmi_driver);
+
+	if (result < 0) {
+		printk(KERN_INFO PREFIX "Error loading mapper\n");
+	} else {
+		printk(KERN_INFO PREFIX "Mapper loaded\n");
+	}
+
+	return result;
+}
+
+static void __exit acpi_wmi_exit(void)
+{
+	struct list_head *p, *tmp;
+	struct wmi_block *wblock;
+
+	acpi_bus_unregister_driver(&acpi_wmi_driver);
+
+	list_for_each_safe(p, tmp, &wmi_blocks.list) {
+		wblock = list_entry(p, struct wmi_block, list);
+
+		list_del(p);
+		kfree(wblock);
+	}
+
+	printk(KERN_INFO PREFIX "Mapper unloaded\n");
+}
+
+subsys_initcall(acpi_wmi_init);
+module_exit(acpi_wmi_exit);
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index f20c30cf99e0..78cd33861766 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -92,6 +92,22 @@ config TIFM_7XX1
           To compile this driver as a module, choose M here: the module will
 	  be called tifm_7xx1.
 
+config ACER_WMI
+        tristate "Acer WMI Laptop Extras (EXPERIMENTAL)"
+	depends on X86
+	depends on EXPERIMENTAL
+	depends on ACPI
+	depends on ACPI_WMI
+	depends on LEDS_CLASS
+	depends on BACKLIGHT_CLASS_DEVICE
+	---help---
+	  This is a driver for newer Acer (and Wistron) laptops. It adds
+	  wireless radio and bluetooth control, and on some laptops,
+	  exposes the mail LED and LCD backlight.
+
+	  If you have an ACPI-WMI compatible Acer/ Wistron laptop, say Y or M
+	  here.
+
 config ASUS_LAPTOP
         tristate "Asus Laptop Extras (EXPERIMENTAL)"
         depends on X86
@@ -126,6 +142,15 @@ config FUJITSU_LAPTOP
 
 	  If you have a Fujitsu laptop, say Y or M here.
 
+config TC1100_WMI
+	tristate "HP Compaq TC1100 Tablet WMI Extras"
+	depends on X86 && !X86_64
+	depends on ACPI
+	depends on ACPI_WMI
+	---help---
+	  This is a driver for the WMI extensions (wireless and bluetooth power
+	  control) of the HP Compaq TC1100 tablet.
+
 config MSI_LAPTOP
         tristate "MSI Laptop Extras"
         depends on X86
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index a9e8faffc1b1..1f41654aae4d 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -6,8 +6,10 @@ obj- := misc.o	# Dummy rule to force built-in.o to be made
 obj-$(CONFIG_IBM_ASM)		+= ibmasm/
 obj-$(CONFIG_HDPU_FEATURES)	+= hdpuftrs/
 obj-$(CONFIG_MSI_LAPTOP)     += msi-laptop.o
+obj-$(CONFIG_ACER_WMI)     += acer-wmi.o
 obj-$(CONFIG_ASUS_LAPTOP)     += asus-laptop.o
 obj-$(CONFIG_ATMEL_SSC)		+= atmel-ssc.o
+obj-$(CONFIG_TC1100_WMI)	+= tc1100-wmi.o
 obj-$(CONFIG_LKDTM)		+= lkdtm.o
 obj-$(CONFIG_TIFM_CORE)       	+= tifm_core.o
 obj-$(CONFIG_TIFM_7XX1)       	+= tifm_7xx1.o
diff --git a/drivers/misc/acer-wmi.c b/drivers/misc/acer-wmi.c
new file mode 100644
index 000000000000..a4d677504250
--- /dev/null
+++ b/drivers/misc/acer-wmi.c
@@ -0,0 +1,1109 @@
+/*
+ *  Acer WMI Laptop Extras
+ *
+ *  Copyright (C) 2007-2008	Carlos Corbacho <carlos@strangeworlds.co.uk>
+ *
+ *  Based on acer_acpi:
+ *    Copyright (C) 2005-2007	E.M. Smith
+ *    Copyright (C) 2007-2008	Carlos Corbacho <cathectic@gmail.com>
+ *
+ *  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 ACER_WMI_VERSION	"0.1"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/dmi.h>
+#include <linux/backlight.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/acpi.h>
+#include <linux/i8042.h>
+
+#include <acpi/acpi_drivers.h>
+
+MODULE_AUTHOR("Carlos Corbacho");
+MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
+MODULE_LICENSE("GPL");
+
+#define ACER_LOGPREFIX "acer-wmi: "
+#define ACER_ERR KERN_ERR ACER_LOGPREFIX
+#define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
+#define ACER_INFO KERN_INFO ACER_LOGPREFIX
+
+/*
+ * The following defines quirks to get some specific functions to work
+ * which are known to not be supported over ACPI-WMI (such as the mail LED
+ * on WMID based Acer's)
+ */
+struct acer_quirks {
+	const char *vendor;
+	const char *model;
+	u16 quirks;
+};
+
+/*
+ * Magic Number
+ * Meaning is unknown - this number is required for writing to ACPI for AMW0
+ * (it's also used in acerhk when directly accessing the BIOS)
+ */
+#define ACER_AMW0_WRITE	0x9610
+
+/*
+ * Bit masks for the AMW0 interface
+ */
+#define ACER_AMW0_WIRELESS_MASK  0x35
+#define ACER_AMW0_BLUETOOTH_MASK 0x34
+#define ACER_AMW0_MAILLED_MASK   0x31
+
+/*
+ * Method IDs for WMID interface
+ */
+#define ACER_WMID_GET_WIRELESS_METHODID		1
+#define ACER_WMID_GET_BLUETOOTH_METHODID	2
+#define ACER_WMID_GET_BRIGHTNESS_METHODID	3
+#define ACER_WMID_SET_WIRELESS_METHODID		4
+#define ACER_WMID_SET_BLUETOOTH_METHODID	5
+#define ACER_WMID_SET_BRIGHTNESS_METHODID	6
+#define ACER_WMID_GET_THREEG_METHODID		10
+#define ACER_WMID_SET_THREEG_METHODID		11
+
+/*
+ * Acer ACPI method GUIDs
+ */
+#define AMW0_GUID1		"67C3371D-95A3-4C37-BB61-DD47B491DAAB"
+#define WMID_GUID1		"6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
+#define WMID_GUID2		"95764E09-FB56-4e83-B31A-37761F60994A"
+
+MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
+MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
+
+/* Temporary workaround until the WMI sysfs interface goes in */
+MODULE_ALIAS("dmi:*:*Acer*:*:");
+
+/*
+ * Interface capability flags
+ */
+#define ACER_CAP_MAILLED		(1<<0)
+#define ACER_CAP_WIRELESS		(1<<1)
+#define ACER_CAP_BLUETOOTH		(1<<2)
+#define ACER_CAP_BRIGHTNESS		(1<<3)
+#define ACER_CAP_THREEG			(1<<4)
+#define ACER_CAP_ANY			(0xFFFFFFFF)
+
+/*
+ * Interface type flags
+ */
+enum interface_flags {
+	ACER_AMW0,
+	ACER_AMW0_V2,
+	ACER_WMID,
+};
+
+#define ACER_DEFAULT_WIRELESS  0
+#define ACER_DEFAULT_BLUETOOTH 0
+#define ACER_DEFAULT_MAILLED   0
+#define ACER_DEFAULT_THREEG    0
+
+static int max_brightness = 0xF;
+
+static int wireless = -1;
+static int bluetooth = -1;
+static int mailled = -1;
+static int brightness = -1;
+static int threeg = -1;
+static int force_series;
+
+module_param(mailled, int, 0444);
+module_param(wireless, int, 0444);
+module_param(bluetooth, int, 0444);
+module_param(brightness, int, 0444);
+module_param(threeg, int, 0444);
+module_param(force_series, int, 0444);
+MODULE_PARM_DESC(wireless, "Set initial state of Wireless hardware");
+MODULE_PARM_DESC(bluetooth, "Set initial state of Bluetooth hardware");
+MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
+MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
+MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
+MODULE_PARM_DESC(force_series, "Force a different laptop series");
+
+struct acer_data {
+	int mailled;
+	int wireless;
+	int bluetooth;
+	int threeg;
+	int brightness;
+};
+
+/* Each low-level interface must define at least some of the following */
+struct wmi_interface {
+	/* The WMI device type */
+	u32 type;
+
+	/* The capabilities this interface provides */
+	u32 capability;
+
+	/* Private data for the current interface */
+	struct acer_data data;
+};
+
+/* The static interface pointer, points to the currently detected interface */
+static struct wmi_interface *interface;
+
+/*
+ * Embedded Controller quirks
+ * Some laptops require us to directly access the EC to either enable or query
+ * features that are not available through WMI.
+ */
+
+struct quirk_entry {
+	u8 wireless;
+	u8 mailled;
+	u8 brightness;
+	u8 bluetooth;
+};
+
+static struct quirk_entry *quirks;
+
+static void set_quirks(void)
+{
+	if (quirks->mailled)
+		interface->capability |= ACER_CAP_MAILLED;
+
+	if (quirks->brightness)
+		interface->capability |= ACER_CAP_BRIGHTNESS;
+}
+
+static int dmi_matched(const struct dmi_system_id *dmi)
+{
+	quirks = dmi->driver_data;
+	return 0;
+}
+
+static struct quirk_entry quirk_unknown = {
+};
+
+static struct quirk_entry quirk_acer_travelmate_2490 = {
+	.mailled = 1,
+};
+
+/* This AMW0 laptop has no bluetooth */
+static struct quirk_entry quirk_medion_md_98300 = {
+	.wireless = 1,
+};
+
+static struct dmi_system_id acer_quirks[] = {
+	{
+		.callback = dmi_matched,
+		.ident = "Acer Aspire 3100",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
+		},
+		.driver_data = &quirk_acer_travelmate_2490,
+	},
+	{
+		.callback = dmi_matched,
+		.ident = "Acer Aspire 5100",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
+		},
+		.driver_data = &quirk_acer_travelmate_2490,
+	},
+	{
+		.callback = dmi_matched,
+		.ident = "Acer Aspire 5630",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
+		},
+		.driver_data = &quirk_acer_travelmate_2490,
+	},
+	{
+		.callback = dmi_matched,
+		.ident = "Acer Aspire 5650",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
+		},
+		.driver_data = &quirk_acer_travelmate_2490,
+	},
+	{
+		.callback = dmi_matched,
+		.ident = "Acer Aspire 5680",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
+		},
+		.driver_data = &quirk_acer_travelmate_2490,
+	},
+	{
+		.callback = dmi_matched,
+		.ident = "Acer Aspire 9110",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
+		},
+		.driver_data = &quirk_acer_travelmate_2490,
+	},
+	{
+		.callback = dmi_matched,
+		.ident = "Acer TravelMate 2490",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
+		},
+		.driver_data = &quirk_acer_travelmate_2490,
+	},
+	{
+		.callback = dmi_matched,
+		.ident = "Medion MD 98300",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
+		},
+		.driver_data = &quirk_medion_md_98300,
+	},
+	{}
+};
+
+/* Find which quirks are needed for a particular vendor/ model pair */
+static void find_quirks(void)
+{
+	if (!force_series) {
+		dmi_check_system(acer_quirks);
+	} else if (force_series == 2490) {
+		quirks = &quirk_acer_travelmate_2490;
+	}
+
+	if (quirks == NULL)
+		quirks = &quirk_unknown;
+
+	set_quirks();
+}
+
+/*
+ * General interface convenience methods
+ */
+
+static bool has_cap(u32 cap)
+{
+	if ((interface->capability & cap) != 0)
+		return 1;
+
+	return 0;
+}
+
+/*
+ * AMW0 (V1) interface
+ */
+struct wmab_args {
+	u32 eax;
+	u32 ebx;
+	u32 ecx;
+	u32 edx;
+};
+
+struct wmab_ret {
+	u32 eax;
+	u32 ebx;
+	u32 ecx;
+	u32 edx;
+	u32 eex;
+};
+
+static acpi_status wmab_execute(struct wmab_args *regbuf,
+struct acpi_buffer *result)
+{
+	struct acpi_buffer input;
+	acpi_status status;
+	input.length = sizeof(struct wmab_args);
+	input.pointer = (u8 *)regbuf;
+
+	status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
+
+	return status;
+}
+
+static acpi_status AMW0_get_u32(u32 *value, u32 cap,
+struct wmi_interface *iface)
+{
+	int err;
+	u8 result;
+
+	switch (cap) {
+	case ACER_CAP_MAILLED:
+		switch (quirks->mailled) {
+		default:
+			err = ec_read(0xA, &result);
+			if (err)
+				return AE_ERROR;
+			*value = (result >> 7) & 0x1;
+			return AE_OK;
+		}
+		break;
+	case ACER_CAP_WIRELESS:
+		switch (quirks->wireless) {
+		case 1:
+			err = ec_read(0x7B, &result);
+			if (err)
+				return AE_ERROR;
+			*value = result & 0x1;
+			return AE_OK;
+		default:
+			err = ec_read(0xA, &result);
+			if (err)
+				return AE_ERROR;
+			*value = (result >> 2) & 0x1;
+			return AE_OK;
+		}
+		break;
+	case ACER_CAP_BLUETOOTH:
+		switch (quirks->bluetooth) {
+		default:
+			err = ec_read(0xA, &result);
+			if (err)
+				return AE_ERROR;
+			*value = (result >> 4) & 0x1;
+			return AE_OK;
+		}
+		break;
+	case ACER_CAP_BRIGHTNESS:
+		switch (quirks->brightness) {
+		default:
+			err = ec_read(0x83, &result);
+			if (err)
+				return AE_ERROR;
+			*value = result;
+			return AE_OK;
+		}
+		break;
+	default:
+		return AE_BAD_ADDRESS;
+	}
+	return AE_OK;
+}
+
+static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
+{
+	struct wmab_args args;
+
+	args.eax = ACER_AMW0_WRITE;
+	args.ebx = value ? (1<<8) : 0;
+	args.ecx = args.edx = 0;
+
+	switch (cap) {
+	case ACER_CAP_MAILLED:
+		if (value > 1)
+			return AE_BAD_PARAMETER;
+		args.ebx |= ACER_AMW0_MAILLED_MASK;
+		break;
+	case ACER_CAP_WIRELESS:
+		if (value > 1)
+			return AE_BAD_PARAMETER;
+		args.ebx |= ACER_AMW0_WIRELESS_MASK;
+		break;
+	case ACER_CAP_BLUETOOTH:
+		if (value > 1)
+			return AE_BAD_PARAMETER;
+		args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
+		break;
+	case ACER_CAP_BRIGHTNESS:
+		if (value > max_brightness)
+			return AE_BAD_PARAMETER;
+		switch (quirks->brightness) {
+		case 1:
+			return ec_write(0x83, value);
+		default:
+			return AE_BAD_ADDRESS;
+		break;
+		}
+	default:
+		return AE_BAD_ADDRESS;
+	}
+
+	/* Actually do the set */
+	return wmab_execute(&args, NULL);
+}
+
+static acpi_status AMW0_find_mailled(void)
+{
+	struct wmab_args args;
+	struct wmab_ret ret;
+	acpi_status status = AE_OK;
+	struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
+	union acpi_object *obj;
+
+	args.eax = 0x86;
+	args.ebx = args.ecx = args.edx = 0;
+
+	status = wmab_execute(&args, &out);
+	if (ACPI_FAILURE(status))
+		return status;
+
+	obj = (union acpi_object *) out.pointer;
+	if (obj && obj->type == ACPI_TYPE_BUFFER &&
+	obj->buffer.length == sizeof(struct wmab_ret)) {
+		ret = *((struct wmab_ret *) obj->buffer.pointer);
+	} else {
+		return AE_ERROR;
+	}
+
+	if (ret.eex & 0x1)
+		interface->capability |= ACER_CAP_MAILLED;
+
+	kfree(out.pointer);
+
+	return AE_OK;
+}
+
+static acpi_status AMW0_set_capabilities(void)
+{
+	struct wmab_args args;
+	struct wmab_ret ret;
+	acpi_status status = AE_OK;
+	struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
+	union acpi_object *obj;
+
+	args.eax = ACER_AMW0_WRITE;
+	args.ecx = args.edx = 0;
+
+	args.ebx = 0xa2 << 8;
+	args.ebx |= ACER_AMW0_WIRELESS_MASK;
+
+	status = wmab_execute(&args, &out);
+	if (ACPI_FAILURE(status))
+		return status;
+
+	obj = (union acpi_object *) out.pointer;
+	if (obj && obj->type == ACPI_TYPE_BUFFER &&
+	obj->buffer.length == sizeof(struct wmab_ret)) {
+		ret = *((struct wmab_ret *) obj->buffer.pointer);
+	} else {
+		return AE_ERROR;
+	}
+
+	if (ret.eax & 0x1)
+		interface->capability |= ACER_CAP_WIRELESS;
+
+	args.ebx = 2 << 8;
+	args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
+
+	status = wmab_execute(&args, &out);
+	if (ACPI_FAILURE(status))
+		return status;
+
+	obj = (union acpi_object *) out.pointer;
+	if (obj && obj->type == ACPI_TYPE_BUFFER
+	&& obj->buffer.length == sizeof(struct wmab_ret)) {
+		ret = *((struct wmab_ret *) obj->buffer.pointer);
+	} else {
+		return AE_ERROR;
+	}
+
+	if (ret.eax & 0x1)
+		interface->capability |= ACER_CAP_BLUETOOTH;
+
+	kfree(out.pointer);
+
+	/*
+	 * This appears to be safe to enable, since all Wistron based laptops
+	 * appear to use the same EC register for brightness, even if they
+	 * differ for wireless, etc
+	 */
+	interface->capability |= ACER_CAP_BRIGHTNESS;
+
+	return AE_OK;
+}
+
+static struct wmi_interface AMW0_interface = {
+	.type = ACER_AMW0,
+};
+
+static struct wmi_interface AMW0_V2_interface = {
+	.type = ACER_AMW0_V2,
+};
+
+/*
+ * New interface (The WMID interface)
+ */
+static acpi_status
+WMI_execute_u32(u32 method_id, u32 in, u32 *out)
+{
+	struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
+	struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
+	union acpi_object *obj;
+	u32 tmp;
+	acpi_status status;
+
+	status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
+
+	if (ACPI_FAILURE(status))
+		return status;
+
+	obj = (union acpi_object *) result.pointer;
+	if (obj && obj->type == ACPI_TYPE_BUFFER &&
+		obj->buffer.length == sizeof(u32)) {
+		tmp = *((u32 *) obj->buffer.pointer);
+	} else {
+		tmp = 0;
+	}
+
+	if (out)
+		*out = tmp;
+
+	kfree(result.pointer);
+
+	return status;
+}
+
+static acpi_status WMID_get_u32(u32 *value, u32 cap,
+struct wmi_interface *iface)
+{
+	acpi_status status;
+	u8 tmp;
+	u32 result, method_id = 0;
+
+	switch (cap) {
+	case ACER_CAP_WIRELESS:
+		method_id = ACER_WMID_GET_WIRELESS_METHODID;
+		break;
+	case ACER_CAP_BLUETOOTH:
+		method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
+		break;
+	case ACER_CAP_BRIGHTNESS:
+		method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
+		break;
+	case ACER_CAP_THREEG:
+		method_id = ACER_WMID_GET_THREEG_METHODID;
+		break;
+	case ACER_CAP_MAILLED:
+		if (quirks->mailled == 1) {
+			ec_read(0x9f, &tmp);
+			*value = tmp & 0x1;
+			return 0;
+		}
+	default:
+		return AE_BAD_ADDRESS;
+	}
+	status = WMI_execute_u32(method_id, 0, &result);
+
+	if (ACPI_SUCCESS(status))
+		*value = (u8)result;
+
+	return status;
+}
+
+static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
+{
+	u32 method_id = 0;
+	char param;
+
+	switch (cap) {
+	case ACER_CAP_BRIGHTNESS:
+		if (value > max_brightness)
+			return AE_BAD_PARAMETER;
+		method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
+		break;
+	case ACER_CAP_WIRELESS:
+		if (value > 1)
+			return AE_BAD_PARAMETER;
+		method_id = ACER_WMID_SET_WIRELESS_METHODID;
+		break;
+	case ACER_CAP_BLUETOOTH:
+		if (value > 1)
+			return AE_BAD_PARAMETER;
+		method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
+		break;
+	case ACER_CAP_THREEG:
+		if (value > 1)
+			return AE_BAD_PARAMETER;
+		method_id = ACER_WMID_SET_THREEG_METHODID;
+		break;
+	case ACER_CAP_MAILLED:
+		if (value > 1)
+			return AE_BAD_PARAMETER;
+		if (quirks->mailled == 1) {
+			param = value ? 0x92 : 0x93;
+			i8042_command(&param, 0x1059);
+			return 0;
+		}
+		break;
+	default:
+		return AE_BAD_ADDRESS;
+	}
+	return WMI_execute_u32(method_id, (u32)value, NULL);
+}
+
+static acpi_status WMID_set_capabilities(void)
+{
+	struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
+	union acpi_object *obj;
+	acpi_status status;
+	u32 devices;
+
+	status = wmi_query_block(WMID_GUID2, 1, &out);
+	if (ACPI_FAILURE(status))
+		return status;
+
+	obj = (union acpi_object *) out.pointer;
+	if (obj && obj->type == ACPI_TYPE_BUFFER &&
+		obj->buffer.length == sizeof(u32)) {
+		devices = *((u32 *) obj->buffer.pointer);
+	} else {
+		return AE_ERROR;
+	}
+
+	/* Not sure on the meaning of the relevant bits yet to detect these */
+	interface->capability |= ACER_CAP_WIRELESS;
+	interface->capability |= ACER_CAP_THREEG;
+
+	/* WMID always provides brightness methods */
+	interface->capability |= ACER_CAP_BRIGHTNESS;
+
+	if (devices & 0x10)
+		interface->capability |= ACER_CAP_BLUETOOTH;
+
+	if (!(devices & 0x20))
+		max_brightness = 0x9;
+
+	return status;
+}
+
+static struct wmi_interface wmid_interface = {
+	.type = ACER_WMID,
+};
+
+/*
+ * Generic Device (interface-independent)
+ */
+
+static acpi_status get_u32(u32 *value, u32 cap)
+{
+	acpi_status status = AE_BAD_ADDRESS;
+
+	switch (interface->type) {
+	case ACER_AMW0:
+		status = AMW0_get_u32(value, cap, interface);
+		break;
+	case ACER_AMW0_V2:
+		if (cap == ACER_CAP_MAILLED) {
+			status = AMW0_get_u32(value, cap, interface);
+			break;
+		}
+	case ACER_WMID:
+		status = WMID_get_u32(value, cap, interface);
+		break;
+	}
+
+	return status;
+}
+
+static acpi_status set_u32(u32 value, u32 cap)
+{
+	if (interface->capability & cap) {
+		switch (interface->type) {
+		case ACER_AMW0:
+			return AMW0_set_u32(value, cap, interface);
+		case ACER_AMW0_V2:
+		case ACER_WMID:
+			return WMID_set_u32(value, cap, interface);
+		default:
+			return AE_BAD_PARAMETER;
+		}
+	}
+	return AE_BAD_PARAMETER;
+}
+
+static void __init acer_commandline_init(void)
+{
+	/*
+	 * These will all fail silently if the value given is invalid, or the
+	 * capability isn't available on the given interface
+	 */
+	set_u32(mailled, ACER_CAP_MAILLED);
+	set_u32(wireless, ACER_CAP_WIRELESS);
+	set_u32(bluetooth, ACER_CAP_BLUETOOTH);
+	set_u32(threeg, ACER_CAP_THREEG);
+	set_u32(brightness, ACER_CAP_BRIGHTNESS);
+}
+
+/*
+ * LED device (Mail LED only, no other LEDs known yet)
+ */
+static void mail_led_set(struct led_classdev *led_cdev,
+enum led_brightness value)
+{
+	set_u32(value, ACER_CAP_MAILLED);
+}
+
+static struct led_classdev mail_led = {
+	.name = "acer-mail:green",
+	.brightness_set = mail_led_set,
+};
+
+static int __init acer_led_init(struct device *dev)
+{
+	return led_classdev_register(dev, &mail_led);
+}
+
+static void acer_led_exit(void)
+{
+	led_classdev_unregister(&mail_led);
+}
+
+/*
+ * Backlight device
+ */
+static struct backlight_device *acer_backlight_device;
+
+static int read_brightness(struct backlight_device *bd)
+{
+	u32 value;
+	get_u32(&value, ACER_CAP_BRIGHTNESS);
+	return value;
+}
+
+static int update_bl_status(struct backlight_device *bd)
+{
+	set_u32(bd->props.brightness, ACER_CAP_BRIGHTNESS);
+	return 0;
+}
+
+static struct backlight_ops acer_bl_ops = {
+	.get_brightness = read_brightness,
+	.update_status = update_bl_status,
+};
+
+static int __init acer_backlight_init(struct device *dev)
+{
+	struct backlight_device *bd;
+
+	bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
+	if (IS_ERR(bd)) {
+		printk(ACER_ERR "Could not register Acer backlight device\n");
+		acer_backlight_device = NULL;
+		return PTR_ERR(bd);
+	}
+
+	acer_backlight_device = bd;
+
+	bd->props.max_brightness = max_brightness;
+	bd->props.brightness = read_brightness(NULL);
+	backlight_update_status(bd);
+	return 0;
+}
+
+static void __exit acer_backlight_exit(void)
+{
+	backlight_device_unregister(acer_backlight_device);
+}
+
+/*
+ * Read/ write bool sysfs macro
+ */
+#define show_set_bool(value, cap) \
+static ssize_t \
+show_bool_##value(struct device *dev, struct device_attribute *attr, \
+	char *buf) \
+{ \
+	u32 result; \
+	acpi_status status = get_u32(&result, cap); \
+	if (ACPI_SUCCESS(status)) \
+		return sprintf(buf, "%u\n", result); \
+	return sprintf(buf, "Read error\n"); \
+} \
+\
+static ssize_t \
+set_bool_##value(struct device *dev, struct device_attribute *attr, \
+	const char *buf, size_t count) \
+{ \
+	u32 tmp = simple_strtoul(buf, NULL, 10); \
+	acpi_status status = set_u32(tmp, cap); \
+		if (ACPI_FAILURE(status)) \
+			return -EINVAL; \
+	return count; \
+} \
+static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
+	show_bool_##value, set_bool_##value);
+
+show_set_bool(wireless, ACER_CAP_WIRELESS);
+show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
+show_set_bool(threeg, ACER_CAP_THREEG);
+
+/*
+ * Read interface sysfs macro
+ */
+static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
+	char *buf)
+{
+	switch (interface->type) {
+	case ACER_AMW0:
+		return sprintf(buf, "AMW0\n");
+	case ACER_AMW0_V2:
+		return sprintf(buf, "AMW0 v2\n");
+	case ACER_WMID:
+		return sprintf(buf, "WMID\n");
+	default:
+		return sprintf(buf, "Error!\n");
+	}
+}
+
+static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
+	show_interface, NULL);
+
+/*
+ * Platform device
+ */
+static int __devinit acer_platform_probe(struct platform_device *device)
+{
+	int err;
+
+	if (has_cap(ACER_CAP_MAILLED)) {
+		err = acer_led_init(&device->dev);
+		if (err)
+			goto error_mailled;
+	}
+
+	if (has_cap(ACER_CAP_BRIGHTNESS)) {
+		err = acer_backlight_init(&device->dev);
+		if (err)
+			goto error_brightness;
+	}
+
+	return 0;
+
+error_brightness:
+	acer_led_exit();
+error_mailled:
+	return err;
+}
+
+static int acer_platform_remove(struct platform_device *device)
+{
+	if (has_cap(ACER_CAP_MAILLED))
+		acer_led_exit();
+	if (has_cap(ACER_CAP_BRIGHTNESS))
+		acer_backlight_exit();
+	return 0;
+}
+
+static int acer_platform_suspend(struct platform_device *dev,
+pm_message_t state)
+{
+	u32 value;
+	struct acer_data *data = &interface->data;
+
+	if (!data)
+		return -ENOMEM;
+
+	if (has_cap(ACER_CAP_WIRELESS)) {
+		get_u32(&value, ACER_CAP_WIRELESS);
+		data->wireless = value;
+	}
+
+	if (has_cap(ACER_CAP_BLUETOOTH)) {
+		get_u32(&value, ACER_CAP_BLUETOOTH);
+		data->bluetooth = value;
+	}
+
+	if (has_cap(ACER_CAP_MAILLED)) {
+		get_u32(&value, ACER_CAP_MAILLED);
+		data->mailled = value;
+	}
+
+	if (has_cap(ACER_CAP_BRIGHTNESS)) {
+		get_u32(&value, ACER_CAP_BRIGHTNESS);
+		data->brightness = value;
+	}
+
+	return 0;
+}
+
+static int acer_platform_resume(struct platform_device *device)
+{
+	struct acer_data *data = &interface->data;
+
+	if (!data)
+		return -ENOMEM;
+
+	if (has_cap(ACER_CAP_WIRELESS))
+		set_u32(data->wireless, ACER_CAP_WIRELESS);
+
+	if (has_cap(ACER_CAP_BLUETOOTH))
+		set_u32(data->bluetooth, ACER_CAP_BLUETOOTH);
+
+	if (has_cap(ACER_CAP_THREEG))
+		set_u32(data->threeg, ACER_CAP_THREEG);
+
+	if (has_cap(ACER_CAP_MAILLED))
+		set_u32(data->mailled, ACER_CAP_MAILLED);
+
+	if (has_cap(ACER_CAP_BRIGHTNESS))
+		set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
+
+	return 0;
+}
+
+static struct platform_driver acer_platform_driver = {
+	.driver = {
+		.name = "acer-wmi",
+		.owner = THIS_MODULE,
+	},
+	.probe = acer_platform_probe,
+	.remove = acer_platform_remove,
+	.suspend = acer_platform_suspend,
+	.resume = acer_platform_resume,
+};
+
+static struct platform_device *acer_platform_device;
+
+static int remove_sysfs(struct platform_device *device)
+{
+	if (has_cap(ACER_CAP_WIRELESS))
+		device_remove_file(&device->dev, &dev_attr_wireless);
+
+	if (has_cap(ACER_CAP_BLUETOOTH))
+		device_remove_file(&device->dev, &dev_attr_bluetooth);
+
+	if (has_cap(ACER_CAP_THREEG))
+		device_remove_file(&device->dev, &dev_attr_threeg);
+
+	device_remove_file(&device->dev, &dev_attr_interface);
+
+	return 0;
+}
+
+static int create_sysfs(void)
+{
+	int retval = -ENOMEM;
+
+	if (has_cap(ACER_CAP_WIRELESS)) {
+		retval = device_create_file(&acer_platform_device->dev,
+			&dev_attr_wireless);
+		if (retval)
+			goto error_sysfs;
+	}
+
+	if (has_cap(ACER_CAP_BLUETOOTH)) {
+		retval = device_create_file(&acer_platform_device->dev,
+			&dev_attr_bluetooth);
+		if (retval)
+			goto error_sysfs;
+	}
+
+	if (has_cap(ACER_CAP_THREEG)) {
+		retval = device_create_file(&acer_platform_device->dev,
+			&dev_attr_threeg);
+		if (retval)
+			goto error_sysfs;
+	}
+
+	retval = device_create_file(&acer_platform_device->dev,
+		&dev_attr_interface);
+	if (retval)
+		goto error_sysfs;
+
+	return 0;
+
+error_sysfs:
+		remove_sysfs(acer_platform_device);
+	return retval;
+}
+
+static int __init acer_wmi_init(void)
+{
+	int err;
+
+	printk(ACER_INFO "Acer Laptop ACPI-WMI Extras version %s\n",
+			ACER_WMI_VERSION);
+
+	/*
+	 * Detect which ACPI-WMI interface we're using.
+	 */
+	if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
+		interface = &AMW0_V2_interface;
+
+	if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
+		interface = &wmid_interface;
+
+	if (wmi_has_guid(WMID_GUID2) && interface) {
+		if (ACPI_FAILURE(WMID_set_capabilities())) {
+			printk(ACER_ERR "Unable to detect available devices\n");
+			return -ENODEV;
+		}
+	} else if (!wmi_has_guid(WMID_GUID2) && interface) {
+		printk(ACER_ERR "Unable to detect available devices\n");
+		return -ENODEV;
+	}
+
+	if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
+		interface = &AMW0_interface;
+
+		if (ACPI_FAILURE(AMW0_set_capabilities())) {
+			printk(ACER_ERR "Unable to detect available devices\n");
+			return -ENODEV;
+		}
+	}
+
+	if (wmi_has_guid(AMW0_GUID1)) {
+		if (ACPI_FAILURE(AMW0_find_mailled()))
+			printk(ACER_ERR "Unable to detect mail LED\n");
+	}
+
+	find_quirks();
+
+	if (!interface) {
+		printk(ACER_ERR "No or unsupported WMI interface, unable to ");
+		printk(KERN_CONT "load.\n");
+		return -ENODEV;
+	}
+
+	if (platform_driver_register(&acer_platform_driver)) {
+		printk(ACER_ERR "Unable to register platform driver.\n");
+		goto error_platform_register;
+	}
+	acer_platform_device = platform_device_alloc("acer-wmi", -1);
+	platform_device_add(acer_platform_device);
+
+	err = create_sysfs();
+	if (err)
+		return err;
+
+	/* Override any initial settings with values from the commandline */
+	acer_commandline_init();
+
+	return 0;
+
+error_platform_register:
+	return -ENODEV;
+}
+
+static void __exit acer_wmi_exit(void)
+{
+	remove_sysfs(acer_platform_device);
+	platform_device_del(acer_platform_device);
+	platform_driver_unregister(&acer_platform_driver);
+
+	printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
+	return;
+}
+
+module_init(acer_wmi_init);
+module_exit(acer_wmi_exit);
diff --git a/drivers/misc/tc1100-wmi.c b/drivers/misc/tc1100-wmi.c
new file mode 100644
index 000000000000..f25e4c974dcf
--- /dev/null
+++ b/drivers/misc/tc1100-wmi.c
@@ -0,0 +1,290 @@
+/*
+ *  HP Compaq TC1100 Tablet WMI Extras Driver
+ *
+ *  Copyright (C) 2007 Carlos Corbacho <carlos@strangeworlds.co.uk>
+ *  Copyright (C) 2004 Jamey Hicks <jamey.hicks@hp.com>
+ *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <acpi/acpi.h>
+#include <acpi/actypes.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+#include <linux/platform_device.h>
+
+#define GUID "C364AC71-36DB-495A-8494-B439D472A505"
+
+#define TC1100_INSTANCE_WIRELESS		1
+#define TC1100_INSTANCE_JOGDIAL		2
+
+#define TC1100_LOGPREFIX "tc1100-wmi: "
+#define TC1100_INFO KERN_INFO TC1100_LOGPREFIX
+
+MODULE_AUTHOR("Jamey Hicks, Carlos Corbacho");
+MODULE_DESCRIPTION("HP Compaq TC1100 Tablet WMI Extras");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("wmi:C364AC71-36DB-495A-8494-B439D472A505");
+
+static int tc1100_probe(struct platform_device *device);
+static int tc1100_remove(struct platform_device *device);
+static int tc1100_suspend(struct platform_device *device, pm_message_t state);
+static int tc1100_resume(struct platform_device *device);
+
+static struct platform_driver tc1100_driver = {
+	.driver = {
+		.name = "tc1100-wmi",
+		.owner = THIS_MODULE,
+	},
+	.probe = tc1100_probe,
+	.remove = tc1100_remove,
+	.suspend = tc1100_suspend,
+	.resume = tc1100_resume,
+};
+
+static struct platform_device *tc1100_device;
+
+struct tc1100_data {
+	u32 wireless;
+	u32 jogdial;
+};
+
+static struct tc1100_data suspend_data;
+
+/* --------------------------------------------------------------------------
+				Device Management
+   -------------------------------------------------------------------------- */
+
+static int get_state(u32 *out, u8 instance)
+{
+	u32 tmp;
+	acpi_status status;
+	struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
+	union acpi_object *obj;
+
+	if (!out)
+		return -EINVAL;
+
+	if (instance > 2)
+		return -ENODEV;
+
+	status = wmi_query_block(GUID, instance, &result);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
+	obj = (union acpi_object *) result.pointer;
+	if (obj && obj->type == ACPI_TYPE_BUFFER &&
+		obj->buffer.length == sizeof(u32)) {
+		tmp = *((u32 *) obj->buffer.pointer);
+	} else {
+		tmp = 0;
+	}
+
+	if (result.length > 0 && result.pointer)
+		kfree(result.pointer);
+
+	switch (instance) {
+	case TC1100_INSTANCE_WIRELESS:
+		*out = (tmp == 3) ? 1 : 0;
+		return 0;
+	case TC1100_INSTANCE_JOGDIAL:
+		*out = (tmp == 1) ? 1 : 0;
+		return 0;
+	default:
+		return -ENODEV;
+	}
+}
+
+static int set_state(u32 *in, u8 instance)
+{
+	u32 value;
+	acpi_status status;
+	struct acpi_buffer input;
+
+	if (!in)
+		return -EINVAL;
+
+	if (instance > 2)
+		return -ENODEV;
+
+	switch (instance) {
+	case TC1100_INSTANCE_WIRELESS:
+		value = (*in) ? 1 : 2;
+		break;
+	case TC1100_INSTANCE_JOGDIAL:
+		value = (*in) ? 0 : 1;
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	input.length = sizeof(u32);
+	input.pointer = &value;
+
+	status = wmi_set_block(GUID, instance, &input);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
+	return 0;
+}
+
+/* --------------------------------------------------------------------------
+				FS Interface (/sys)
+   -------------------------------------------------------------------------- */
+
+/*
+ * Read/ write bool sysfs macro
+ */
+#define show_set_bool(value, instance) \
+static ssize_t \
+show_bool_##value(struct device *dev, struct device_attribute *attr, \
+	char *buf) \
+{ \
+	u32 result; \
+	acpi_status status = get_state(&result, instance); \
+	if (ACPI_SUCCESS(status)) \
+		return sprintf(buf, "%d\n", result); \
+	return sprintf(buf, "Read error\n"); \
+} \
+\
+static ssize_t \
+set_bool_##value(struct device *dev, struct device_attribute *attr, \
+	const char *buf, size_t count) \
+{ \
+	u32 tmp = simple_strtoul(buf, NULL, 10); \
+	acpi_status status = set_state(&tmp, instance); \
+		if (ACPI_FAILURE(status)) \
+			return -EINVAL; \
+	return count; \
+} \
+static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
+	show_bool_##value, set_bool_##value);
+
+show_set_bool(wireless, TC1100_INSTANCE_WIRELESS);
+show_set_bool(jogdial, TC1100_INSTANCE_JOGDIAL);
+
+static void remove_fs(void)
+{
+	device_remove_file(&tc1100_device->dev, &dev_attr_wireless);
+	device_remove_file(&tc1100_device->dev, &dev_attr_jogdial);
+}
+
+static int add_fs(void)
+{
+	int ret;
+
+	ret = device_create_file(&tc1100_device->dev, &dev_attr_wireless);
+	if (ret)
+		goto add_sysfs_error;
+
+	ret = device_create_file(&tc1100_device->dev, &dev_attr_jogdial);
+	if (ret)
+		goto add_sysfs_error;
+
+	return ret;
+
+add_sysfs_error:
+	remove_fs();
+	return ret;
+}
+
+/* --------------------------------------------------------------------------
+				Driver Model
+   -------------------------------------------------------------------------- */
+
+static int tc1100_probe(struct platform_device *device)
+{
+	int result = 0;
+
+	result = add_fs();
+	return result;
+}
+
+
+static int tc1100_remove(struct platform_device *device)
+{
+	remove_fs();
+	return 0;
+}
+
+static int tc1100_suspend(struct platform_device *dev, pm_message_t state)
+{
+	int ret;
+
+	ret = get_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
+	if (ret)
+		return ret;
+
+	ret = get_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
+	if (ret)
+		return ret;
+
+	return ret;
+}
+
+static int tc1100_resume(struct platform_device *dev)
+{
+	int ret;
+
+	ret = set_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
+	if (ret)
+		return ret;
+
+	ret = set_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
+	if (ret)
+		return ret;
+
+	return ret;
+}
+
+static int __init tc1100_init(void)
+{
+	int result = 0;
+
+	if (!wmi_has_guid(GUID))
+		return -ENODEV;
+
+	result = platform_driver_register(&tc1100_driver);
+	if (result)
+		return result;
+
+	tc1100_device = platform_device_alloc("tc1100-wmi", -1);
+	platform_device_add(tc1100_device);
+
+	printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras loaded\n");
+
+	return result;
+}
+
+static void __exit tc1100_exit(void)
+{
+	platform_device_del(tc1100_device);
+	platform_driver_unregister(&tc1100_driver);
+
+	printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras unloaded\n");
+}
+
+module_init(tc1100_init);
+module_exit(tc1100_exit);
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index cf13bec517b7..5a5a13b64d09 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -193,6 +193,26 @@ extern int ec_transaction(u8 command,
 
 #endif /*CONFIG_ACPI_EC*/
 
+#if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE)
+
+typedef void (*wmi_notify_handler) (u32 value, void *context);
+
+extern acpi_status wmi_evaluate_method(const char *guid, u8 instance,
+					u32 method_id,
+					const struct acpi_buffer *in,
+					struct acpi_buffer *out);
+extern acpi_status wmi_query_block(const char *guid, u8 instance,
+					struct acpi_buffer *out);
+extern acpi_status wmi_set_block(const char *guid, u8 instance,
+					const struct acpi_buffer *in);
+extern acpi_status wmi_install_notify_handler(const char *guid,
+					wmi_notify_handler handler, void *data);
+extern acpi_status wmi_remove_notify_handler(const char *guid);
+extern acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out);
+extern bool wmi_has_guid(const char *guid);
+
+#endif	/* CONFIG_ACPI_WMI */
+
 extern int acpi_blacklisted(void);
 #ifdef CONFIG_DMI
 extern void acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d);