Initial import

1 files changed, 1171 insertions, 0 deletions

diff --git a/drivers/platform/x86/classmate-laptop.c b/drivers/platform/x86/classmate-laptop.c
new file mode 100644
index 000000000..55cf10bc7
--- /dev/null
+++ b/drivers/platform/x86/classmate-laptop.c
@@ -0,0 +1,1171 @@
+/*
+ *  Copyright (C) 2009  Thadeu Lima de Souza Cascardo <cascardo@holoscopio.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.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/acpi.h>
+#include <linux/backlight.h>
+#include <linux/input.h>
+#include <linux/rfkill.h>
+
+MODULE_LICENSE("GPL");
+
+struct cmpc_accel {
+	int sensitivity;
+	int g_select;
+	int inputdev_state;
+};
+
+#define CMPC_ACCEL_DEV_STATE_CLOSED	0
+#define CMPC_ACCEL_DEV_STATE_OPEN	1
+
+#define CMPC_ACCEL_SENSITIVITY_DEFAULT		5
+#define CMPC_ACCEL_G_SELECT_DEFAULT		0
+
+#define CMPC_ACCEL_HID		"ACCE0000"
+#define CMPC_ACCEL_HID_V4	"ACCE0001"
+#define CMPC_TABLET_HID		"TBLT0000"
+#define CMPC_IPML_HID	"IPML200"
+#define CMPC_KEYS_HID		"FNBT0000"
+
+/*
+ * Generic input device code.
+ */
+
+typedef void (*input_device_init)(struct input_dev *dev);
+
+static int cmpc_add_acpi_notify_device(struct acpi_device *acpi, char *name,
+				       input_device_init idev_init)
+{
+	struct input_dev *inputdev;
+	int error;
+
+	inputdev = input_allocate_device();
+	if (!inputdev)
+		return -ENOMEM;
+	inputdev->name = name;
+	inputdev->dev.parent = &acpi->dev;
+	idev_init(inputdev);
+	error = input_register_device(inputdev);
+	if (error) {
+		input_free_device(inputdev);
+		return error;
+	}
+	dev_set_drvdata(&acpi->dev, inputdev);
+	return 0;
+}
+
+static int cmpc_remove_acpi_notify_device(struct acpi_device *acpi)
+{
+	struct input_dev *inputdev = dev_get_drvdata(&acpi->dev);
+	input_unregister_device(inputdev);
+	return 0;
+}
+
+/*
+ * Accelerometer code for Classmate V4
+ */
+static acpi_status cmpc_start_accel_v4(acpi_handle handle)
+{
+	union acpi_object param[4];
+	struct acpi_object_list input;
+	acpi_status status;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x3;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = 0;
+	param[2].type = ACPI_TYPE_INTEGER;
+	param[2].integer.value = 0;
+	param[3].type = ACPI_TYPE_INTEGER;
+	param[3].integer.value = 0;
+	input.count = 4;
+	input.pointer = param;
+	status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
+	return status;
+}
+
+static acpi_status cmpc_stop_accel_v4(acpi_handle handle)
+{
+	union acpi_object param[4];
+	struct acpi_object_list input;
+	acpi_status status;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x4;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = 0;
+	param[2].type = ACPI_TYPE_INTEGER;
+	param[2].integer.value = 0;
+	param[3].type = ACPI_TYPE_INTEGER;
+	param[3].integer.value = 0;
+	input.count = 4;
+	input.pointer = param;
+	status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
+	return status;
+}
+
+static acpi_status cmpc_accel_set_sensitivity_v4(acpi_handle handle, int val)
+{
+	union acpi_object param[4];
+	struct acpi_object_list input;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x02;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = val;
+	param[2].type = ACPI_TYPE_INTEGER;
+	param[2].integer.value = 0;
+	param[3].type = ACPI_TYPE_INTEGER;
+	param[3].integer.value = 0;
+	input.count = 4;
+	input.pointer = param;
+	return acpi_evaluate_object(handle, "ACMD", &input, NULL);
+}
+
+static acpi_status cmpc_accel_set_g_select_v4(acpi_handle handle, int val)
+{
+	union acpi_object param[4];
+	struct acpi_object_list input;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x05;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = val;
+	param[2].type = ACPI_TYPE_INTEGER;
+	param[2].integer.value = 0;
+	param[3].type = ACPI_TYPE_INTEGER;
+	param[3].integer.value = 0;
+	input.count = 4;
+	input.pointer = param;
+	return acpi_evaluate_object(handle, "ACMD", &input, NULL);
+}
+
+static acpi_status cmpc_get_accel_v4(acpi_handle handle,
+				     int16_t *x,
+				     int16_t *y,
+				     int16_t *z)
+{
+	union acpi_object param[4];
+	struct acpi_object_list input;
+	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+	int16_t *locs;
+	acpi_status status;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x01;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = 0;
+	param[2].type = ACPI_TYPE_INTEGER;
+	param[2].integer.value = 0;
+	param[3].type = ACPI_TYPE_INTEGER;
+	param[3].integer.value = 0;
+	input.count = 4;
+	input.pointer = param;
+	status = acpi_evaluate_object(handle, "ACMD", &input, &output);
+	if (ACPI_SUCCESS(status)) {
+		union acpi_object *obj;
+		obj = output.pointer;
+		locs = (int16_t *) obj->buffer.pointer;
+		*x = locs[0];
+		*y = locs[1];
+		*z = locs[2];
+		kfree(output.pointer);
+	}
+	return status;
+}
+
+static void cmpc_accel_handler_v4(struct acpi_device *dev, u32 event)
+{
+	if (event == 0x81) {
+		int16_t x, y, z;
+		acpi_status status;
+
+		status = cmpc_get_accel_v4(dev->handle, &x, &y, &z);
+		if (ACPI_SUCCESS(status)) {
+			struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
+
+			input_report_abs(inputdev, ABS_X, x);
+			input_report_abs(inputdev, ABS_Y, y);
+			input_report_abs(inputdev, ABS_Z, z);
+			input_sync(inputdev);
+		}
+	}
+}
+
+static ssize_t cmpc_accel_sensitivity_show_v4(struct device *dev,
+					      struct device_attribute *attr,
+					      char *buf)
+{
+	struct acpi_device *acpi;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	acpi = to_acpi_device(dev);
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	return sprintf(buf, "%d\n", accel->sensitivity);
+}
+
+static ssize_t cmpc_accel_sensitivity_store_v4(struct device *dev,
+					       struct device_attribute *attr,
+					       const char *buf, size_t count)
+{
+	struct acpi_device *acpi;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+	unsigned long sensitivity;
+	int r;
+
+	acpi = to_acpi_device(dev);
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	r = kstrtoul(buf, 0, &sensitivity);
+	if (r)
+		return r;
+
+	/* sensitivity must be between 1 and 127 */
+	if (sensitivity < 1 || sensitivity > 127)
+		return -EINVAL;
+
+	accel->sensitivity = sensitivity;
+	cmpc_accel_set_sensitivity_v4(acpi->handle, sensitivity);
+
+	return strnlen(buf, count);
+}
+
+static struct device_attribute cmpc_accel_sensitivity_attr_v4 = {
+	.attr = { .name = "sensitivity", .mode = 0660 },
+	.show = cmpc_accel_sensitivity_show_v4,
+	.store = cmpc_accel_sensitivity_store_v4
+};
+
+static ssize_t cmpc_accel_g_select_show_v4(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct acpi_device *acpi;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	acpi = to_acpi_device(dev);
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	return sprintf(buf, "%d\n", accel->g_select);
+}
+
+static ssize_t cmpc_accel_g_select_store_v4(struct device *dev,
+					    struct device_attribute *attr,
+					    const char *buf, size_t count)
+{
+	struct acpi_device *acpi;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+	unsigned long g_select;
+	int r;
+
+	acpi = to_acpi_device(dev);
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	r = kstrtoul(buf, 0, &g_select);
+	if (r)
+		return r;
+
+	/* 0 means 1.5g, 1 means 6g, everything else is wrong */
+	if (g_select != 0 && g_select != 1)
+		return -EINVAL;
+
+	accel->g_select = g_select;
+	cmpc_accel_set_g_select_v4(acpi->handle, g_select);
+
+	return strnlen(buf, count);
+}
+
+static struct device_attribute cmpc_accel_g_select_attr_v4 = {
+	.attr = { .name = "g_select", .mode = 0660 },
+	.show = cmpc_accel_g_select_show_v4,
+	.store = cmpc_accel_g_select_store_v4
+};
+
+static int cmpc_accel_open_v4(struct input_dev *input)
+{
+	struct acpi_device *acpi;
+	struct cmpc_accel *accel;
+
+	acpi = to_acpi_device(input->dev.parent);
+	accel = dev_get_drvdata(&input->dev);
+
+	cmpc_accel_set_sensitivity_v4(acpi->handle, accel->sensitivity);
+	cmpc_accel_set_g_select_v4(acpi->handle, accel->g_select);
+
+	if (ACPI_SUCCESS(cmpc_start_accel_v4(acpi->handle))) {
+		accel->inputdev_state = CMPC_ACCEL_DEV_STATE_OPEN;
+		return 0;
+	}
+	return -EIO;
+}
+
+static void cmpc_accel_close_v4(struct input_dev *input)
+{
+	struct acpi_device *acpi;
+	struct cmpc_accel *accel;
+
+	acpi = to_acpi_device(input->dev.parent);
+	accel = dev_get_drvdata(&input->dev);
+
+	cmpc_stop_accel_v4(acpi->handle);
+	accel->inputdev_state = CMPC_ACCEL_DEV_STATE_CLOSED;
+}
+
+static void cmpc_accel_idev_init_v4(struct input_dev *inputdev)
+{
+	set_bit(EV_ABS, inputdev->evbit);
+	input_set_abs_params(inputdev, ABS_X, -255, 255, 16, 0);
+	input_set_abs_params(inputdev, ABS_Y, -255, 255, 16, 0);
+	input_set_abs_params(inputdev, ABS_Z, -255, 255, 16, 0);
+	inputdev->open = cmpc_accel_open_v4;
+	inputdev->close = cmpc_accel_close_v4;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int cmpc_accel_suspend_v4(struct device *dev)
+{
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	inputdev = dev_get_drvdata(dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	if (accel->inputdev_state == CMPC_ACCEL_DEV_STATE_OPEN)
+		return cmpc_stop_accel_v4(to_acpi_device(dev)->handle);
+
+	return 0;
+}
+
+static int cmpc_accel_resume_v4(struct device *dev)
+{
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	inputdev = dev_get_drvdata(dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	if (accel->inputdev_state == CMPC_ACCEL_DEV_STATE_OPEN) {
+		cmpc_accel_set_sensitivity_v4(to_acpi_device(dev)->handle,
+					      accel->sensitivity);
+		cmpc_accel_set_g_select_v4(to_acpi_device(dev)->handle,
+					   accel->g_select);
+
+		if (ACPI_FAILURE(cmpc_start_accel_v4(to_acpi_device(dev)->handle)))
+			return -EIO;
+	}
+
+	return 0;
+}
+#endif
+
+static int cmpc_accel_add_v4(struct acpi_device *acpi)
+{
+	int error;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	accel = kmalloc(sizeof(*accel), GFP_KERNEL);
+	if (!accel)
+		return -ENOMEM;
+
+	accel->inputdev_state = CMPC_ACCEL_DEV_STATE_CLOSED;
+
+	accel->sensitivity = CMPC_ACCEL_SENSITIVITY_DEFAULT;
+	cmpc_accel_set_sensitivity_v4(acpi->handle, accel->sensitivity);
+
+	error = device_create_file(&acpi->dev, &cmpc_accel_sensitivity_attr_v4);
+	if (error)
+		goto failed_sensitivity;
+
+	accel->g_select = CMPC_ACCEL_G_SELECT_DEFAULT;
+	cmpc_accel_set_g_select_v4(acpi->handle, accel->g_select);
+
+	error = device_create_file(&acpi->dev, &cmpc_accel_g_select_attr_v4);
+	if (error)
+		goto failed_g_select;
+
+	error = cmpc_add_acpi_notify_device(acpi, "cmpc_accel_v4",
+					    cmpc_accel_idev_init_v4);
+	if (error)
+		goto failed_input;
+
+	inputdev = dev_get_drvdata(&acpi->dev);
+	dev_set_drvdata(&inputdev->dev, accel);
+
+	return 0;
+
+failed_input:
+	device_remove_file(&acpi->dev, &cmpc_accel_g_select_attr_v4);
+failed_g_select:
+	device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr_v4);
+failed_sensitivity:
+	kfree(accel);
+	return error;
+}
+
+static int cmpc_accel_remove_v4(struct acpi_device *acpi)
+{
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr_v4);
+	device_remove_file(&acpi->dev, &cmpc_accel_g_select_attr_v4);
+	return cmpc_remove_acpi_notify_device(acpi);
+}
+
+static SIMPLE_DEV_PM_OPS(cmpc_accel_pm, cmpc_accel_suspend_v4,
+			 cmpc_accel_resume_v4);
+
+static const struct acpi_device_id cmpc_accel_device_ids_v4[] = {
+	{CMPC_ACCEL_HID_V4, 0},
+	{"", 0}
+};
+
+static struct acpi_driver cmpc_accel_acpi_driver_v4 = {
+	.owner = THIS_MODULE,
+	.name = "cmpc_accel_v4",
+	.class = "cmpc_accel_v4",
+	.ids = cmpc_accel_device_ids_v4,
+	.ops = {
+		.add = cmpc_accel_add_v4,
+		.remove = cmpc_accel_remove_v4,
+		.notify = cmpc_accel_handler_v4,
+	},
+	.drv.pm = &cmpc_accel_pm,
+};
+
+
+/*
+ * Accelerometer code for Classmate versions prior to V4
+ */
+static acpi_status cmpc_start_accel(acpi_handle handle)
+{
+	union acpi_object param[2];
+	struct acpi_object_list input;
+	acpi_status status;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x3;
+	param[1].type = ACPI_TYPE_INTEGER;
+	input.count = 2;
+	input.pointer = param;
+	status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
+	return status;
+}
+
+static acpi_status cmpc_stop_accel(acpi_handle handle)
+{
+	union acpi_object param[2];
+	struct acpi_object_list input;
+	acpi_status status;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x4;
+	param[1].type = ACPI_TYPE_INTEGER;
+	input.count = 2;
+	input.pointer = param;
+	status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
+	return status;
+}
+
+static acpi_status cmpc_accel_set_sensitivity(acpi_handle handle, int val)
+{
+	union acpi_object param[2];
+	struct acpi_object_list input;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x02;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = val;
+	input.count = 2;
+	input.pointer = param;
+	return acpi_evaluate_object(handle, "ACMD", &input, NULL);
+}
+
+static acpi_status cmpc_get_accel(acpi_handle handle,
+				  unsigned char *x,
+				  unsigned char *y,
+				  unsigned char *z)
+{
+	union acpi_object param[2];
+	struct acpi_object_list input;
+	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+	unsigned char *locs;
+	acpi_status status;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0x01;
+	param[1].type = ACPI_TYPE_INTEGER;
+	input.count = 2;
+	input.pointer = param;
+	status = acpi_evaluate_object(handle, "ACMD", &input, &output);
+	if (ACPI_SUCCESS(status)) {
+		union acpi_object *obj;
+		obj = output.pointer;
+		locs = obj->buffer.pointer;
+		*x = locs[0];
+		*y = locs[1];
+		*z = locs[2];
+		kfree(output.pointer);
+	}
+	return status;
+}
+
+static void cmpc_accel_handler(struct acpi_device *dev, u32 event)
+{
+	if (event == 0x81) {
+		unsigned char x, y, z;
+		acpi_status status;
+
+		status = cmpc_get_accel(dev->handle, &x, &y, &z);
+		if (ACPI_SUCCESS(status)) {
+			struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
+
+			input_report_abs(inputdev, ABS_X, x);
+			input_report_abs(inputdev, ABS_Y, y);
+			input_report_abs(inputdev, ABS_Z, z);
+			input_sync(inputdev);
+		}
+	}
+}
+
+static ssize_t cmpc_accel_sensitivity_show(struct device *dev,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct acpi_device *acpi;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	acpi = to_acpi_device(dev);
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	return sprintf(buf, "%d\n", accel->sensitivity);
+}
+
+static ssize_t cmpc_accel_sensitivity_store(struct device *dev,
+					    struct device_attribute *attr,
+					    const char *buf, size_t count)
+{
+	struct acpi_device *acpi;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+	unsigned long sensitivity;
+	int r;
+
+	acpi = to_acpi_device(dev);
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	r = kstrtoul(buf, 0, &sensitivity);
+	if (r)
+		return r;
+
+	accel->sensitivity = sensitivity;
+	cmpc_accel_set_sensitivity(acpi->handle, sensitivity);
+
+	return strnlen(buf, count);
+}
+
+static struct device_attribute cmpc_accel_sensitivity_attr = {
+	.attr = { .name = "sensitivity", .mode = 0660 },
+	.show = cmpc_accel_sensitivity_show,
+	.store = cmpc_accel_sensitivity_store
+};
+
+static int cmpc_accel_open(struct input_dev *input)
+{
+	struct acpi_device *acpi;
+
+	acpi = to_acpi_device(input->dev.parent);
+	if (ACPI_SUCCESS(cmpc_start_accel(acpi->handle)))
+		return 0;
+	return -EIO;
+}
+
+static void cmpc_accel_close(struct input_dev *input)
+{
+	struct acpi_device *acpi;
+
+	acpi = to_acpi_device(input->dev.parent);
+	cmpc_stop_accel(acpi->handle);
+}
+
+static void cmpc_accel_idev_init(struct input_dev *inputdev)
+{
+	set_bit(EV_ABS, inputdev->evbit);
+	input_set_abs_params(inputdev, ABS_X, 0, 255, 8, 0);
+	input_set_abs_params(inputdev, ABS_Y, 0, 255, 8, 0);
+	input_set_abs_params(inputdev, ABS_Z, 0, 255, 8, 0);
+	inputdev->open = cmpc_accel_open;
+	inputdev->close = cmpc_accel_close;
+}
+
+static int cmpc_accel_add(struct acpi_device *acpi)
+{
+	int error;
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	accel = kmalloc(sizeof(*accel), GFP_KERNEL);
+	if (!accel)
+		return -ENOMEM;
+
+	accel->sensitivity = CMPC_ACCEL_SENSITIVITY_DEFAULT;
+	cmpc_accel_set_sensitivity(acpi->handle, accel->sensitivity);
+
+	error = device_create_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
+	if (error)
+		goto failed_file;
+
+	error = cmpc_add_acpi_notify_device(acpi, "cmpc_accel",
+					    cmpc_accel_idev_init);
+	if (error)
+		goto failed_input;
+
+	inputdev = dev_get_drvdata(&acpi->dev);
+	dev_set_drvdata(&inputdev->dev, accel);
+
+	return 0;
+
+failed_input:
+	device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
+failed_file:
+	kfree(accel);
+	return error;
+}
+
+static int cmpc_accel_remove(struct acpi_device *acpi)
+{
+	struct input_dev *inputdev;
+	struct cmpc_accel *accel;
+
+	inputdev = dev_get_drvdata(&acpi->dev);
+	accel = dev_get_drvdata(&inputdev->dev);
+
+	device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
+	return cmpc_remove_acpi_notify_device(acpi);
+}
+
+static const struct acpi_device_id cmpc_accel_device_ids[] = {
+	{CMPC_ACCEL_HID, 0},
+	{"", 0}
+};
+
+static struct acpi_driver cmpc_accel_acpi_driver = {
+	.owner = THIS_MODULE,
+	.name = "cmpc_accel",
+	.class = "cmpc_accel",
+	.ids = cmpc_accel_device_ids,
+	.ops = {
+		.add = cmpc_accel_add,
+		.remove = cmpc_accel_remove,
+		.notify = cmpc_accel_handler,
+	}
+};
+
+
+/*
+ * Tablet mode code.
+ */
+static acpi_status cmpc_get_tablet(acpi_handle handle,
+				   unsigned long long *value)
+{
+	union acpi_object param;
+	struct acpi_object_list input;
+	unsigned long long output;
+	acpi_status status;
+
+	param.type = ACPI_TYPE_INTEGER;
+	param.integer.value = 0x01;
+	input.count = 1;
+	input.pointer = &param;
+	status = acpi_evaluate_integer(handle, "TCMD", &input, &output);
+	if (ACPI_SUCCESS(status))
+		*value = output;
+	return status;
+}
+
+static void cmpc_tablet_handler(struct acpi_device *dev, u32 event)
+{
+	unsigned long long val = 0;
+	struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
+
+	if (event == 0x81) {
+		if (ACPI_SUCCESS(cmpc_get_tablet(dev->handle, &val))) {
+			input_report_switch(inputdev, SW_TABLET_MODE, !val);
+			input_sync(inputdev);
+		}
+	}
+}
+
+static void cmpc_tablet_idev_init(struct input_dev *inputdev)
+{
+	unsigned long long val = 0;
+	struct acpi_device *acpi;
+
+	set_bit(EV_SW, inputdev->evbit);
+	set_bit(SW_TABLET_MODE, inputdev->swbit);
+
+	acpi = to_acpi_device(inputdev->dev.parent);
+	if (ACPI_SUCCESS(cmpc_get_tablet(acpi->handle, &val))) {
+		input_report_switch(inputdev, SW_TABLET_MODE, !val);
+		input_sync(inputdev);
+	}
+}
+
+static int cmpc_tablet_add(struct acpi_device *acpi)
+{
+	return cmpc_add_acpi_notify_device(acpi, "cmpc_tablet",
+					   cmpc_tablet_idev_init);
+}
+
+static int cmpc_tablet_remove(struct acpi_device *acpi)
+{
+	return cmpc_remove_acpi_notify_device(acpi);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int cmpc_tablet_resume(struct device *dev)
+{
+	struct input_dev *inputdev = dev_get_drvdata(dev);
+
+	unsigned long long val = 0;
+	if (ACPI_SUCCESS(cmpc_get_tablet(to_acpi_device(dev)->handle, &val))) {
+		input_report_switch(inputdev, SW_TABLET_MODE, !val);
+		input_sync(inputdev);
+	}
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(cmpc_tablet_pm, NULL, cmpc_tablet_resume);
+
+static const struct acpi_device_id cmpc_tablet_device_ids[] = {
+	{CMPC_TABLET_HID, 0},
+	{"", 0}
+};
+
+static struct acpi_driver cmpc_tablet_acpi_driver = {
+	.owner = THIS_MODULE,
+	.name = "cmpc_tablet",
+	.class = "cmpc_tablet",
+	.ids = cmpc_tablet_device_ids,
+	.ops = {
+		.add = cmpc_tablet_add,
+		.remove = cmpc_tablet_remove,
+		.notify = cmpc_tablet_handler,
+	},
+	.drv.pm = &cmpc_tablet_pm,
+};
+
+
+/*
+ * Backlight code.
+ */
+
+static acpi_status cmpc_get_brightness(acpi_handle handle,
+				       unsigned long long *value)
+{
+	union acpi_object param;
+	struct acpi_object_list input;
+	unsigned long long output;
+	acpi_status status;
+
+	param.type = ACPI_TYPE_INTEGER;
+	param.integer.value = 0xC0;
+	input.count = 1;
+	input.pointer = &param;
+	status = acpi_evaluate_integer(handle, "GRDI", &input, &output);
+	if (ACPI_SUCCESS(status))
+		*value = output;
+	return status;
+}
+
+static acpi_status cmpc_set_brightness(acpi_handle handle,
+				       unsigned long long value)
+{
+	union acpi_object param[2];
+	struct acpi_object_list input;
+	acpi_status status;
+	unsigned long long output;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0xC0;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = value;
+	input.count = 2;
+	input.pointer = param;
+	status = acpi_evaluate_integer(handle, "GWRI", &input, &output);
+	return status;
+}
+
+static int cmpc_bl_get_brightness(struct backlight_device *bd)
+{
+	acpi_status status;
+	acpi_handle handle;
+	unsigned long long brightness;
+
+	handle = bl_get_data(bd);
+	status = cmpc_get_brightness(handle, &brightness);
+	if (ACPI_SUCCESS(status))
+		return brightness;
+	else
+		return -1;
+}
+
+static int cmpc_bl_update_status(struct backlight_device *bd)
+{
+	acpi_status status;
+	acpi_handle handle;
+
+	handle = bl_get_data(bd);
+	status = cmpc_set_brightness(handle, bd->props.brightness);
+	if (ACPI_SUCCESS(status))
+		return 0;
+	else
+		return -1;
+}
+
+static const struct backlight_ops cmpc_bl_ops = {
+	.get_brightness = cmpc_bl_get_brightness,
+	.update_status = cmpc_bl_update_status
+};
+
+/*
+ * RFKILL code.
+ */
+
+static acpi_status cmpc_get_rfkill_wlan(acpi_handle handle,
+					unsigned long long *value)
+{
+	union acpi_object param;
+	struct acpi_object_list input;
+	unsigned long long output;
+	acpi_status status;
+
+	param.type = ACPI_TYPE_INTEGER;
+	param.integer.value = 0xC1;
+	input.count = 1;
+	input.pointer = &param;
+	status = acpi_evaluate_integer(handle, "GRDI", &input, &output);
+	if (ACPI_SUCCESS(status))
+		*value = output;
+	return status;
+}
+
+static acpi_status cmpc_set_rfkill_wlan(acpi_handle handle,
+					unsigned long long value)
+{
+	union acpi_object param[2];
+	struct acpi_object_list input;
+	acpi_status status;
+	unsigned long long output;
+
+	param[0].type = ACPI_TYPE_INTEGER;
+	param[0].integer.value = 0xC1;
+	param[1].type = ACPI_TYPE_INTEGER;
+	param[1].integer.value = value;
+	input.count = 2;
+	input.pointer = param;
+	status = acpi_evaluate_integer(handle, "GWRI", &input, &output);
+	return status;
+}
+
+static void cmpc_rfkill_query(struct rfkill *rfkill, void *data)
+{
+	acpi_status status;
+	acpi_handle handle;
+	unsigned long long state;
+	bool blocked;
+
+	handle = data;
+	status = cmpc_get_rfkill_wlan(handle, &state);
+	if (ACPI_SUCCESS(status)) {
+		blocked = state & 1 ? false : true;
+		rfkill_set_sw_state(rfkill, blocked);
+	}
+}
+
+static int cmpc_rfkill_block(void *data, bool blocked)
+{
+	acpi_status status;
+	acpi_handle handle;
+	unsigned long long state;
+	bool is_blocked;
+
+	handle = data;
+	status = cmpc_get_rfkill_wlan(handle, &state);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+	/* Check if we really need to call cmpc_set_rfkill_wlan */
+	is_blocked = state & 1 ? false : true;
+	if (is_blocked != blocked) {
+		state = blocked ? 0 : 1;
+		status = cmpc_set_rfkill_wlan(handle, state);
+		if (ACPI_FAILURE(status))
+			return -ENODEV;
+	}
+	return 0;
+}
+
+static const struct rfkill_ops cmpc_rfkill_ops = {
+	.query = cmpc_rfkill_query,
+	.set_block = cmpc_rfkill_block,
+};
+
+/*
+ * Common backlight and rfkill code.
+ */
+
+struct ipml200_dev {
+	struct backlight_device *bd;
+	struct rfkill *rf;
+};
+
+static int cmpc_ipml_add(struct acpi_device *acpi)
+{
+	int retval;
+	struct ipml200_dev *ipml;
+	struct backlight_properties props;
+
+	ipml = kmalloc(sizeof(*ipml), GFP_KERNEL);
+	if (ipml == NULL)
+		return -ENOMEM;
+
+	memset(&props, 0, sizeof(struct backlight_properties));
+	props.type = BACKLIGHT_PLATFORM;
+	props.max_brightness = 7;
+	ipml->bd = backlight_device_register("cmpc_bl", &acpi->dev,
+					     acpi->handle, &cmpc_bl_ops,
+					     &props);
+	if (IS_ERR(ipml->bd)) {
+		retval = PTR_ERR(ipml->bd);
+		goto out_bd;
+	}
+
+	ipml->rf = rfkill_alloc("cmpc_rfkill", &acpi->dev, RFKILL_TYPE_WLAN,
+				&cmpc_rfkill_ops, acpi->handle);
+	/*
+	 * If RFKILL is disabled, rfkill_alloc will return ERR_PTR(-ENODEV).
+	 * This is OK, however, since all other uses of the device will not
+	 * derefence it.
+	 */
+	if (ipml->rf) {
+		retval = rfkill_register(ipml->rf);
+		if (retval) {
+			rfkill_destroy(ipml->rf);
+			ipml->rf = NULL;
+		}
+	}
+
+	dev_set_drvdata(&acpi->dev, ipml);
+	return 0;
+
+out_bd:
+	kfree(ipml);
+	return retval;
+}
+
+static int cmpc_ipml_remove(struct acpi_device *acpi)
+{
+	struct ipml200_dev *ipml;
+
+	ipml = dev_get_drvdata(&acpi->dev);
+
+	backlight_device_unregister(ipml->bd);
+
+	if (ipml->rf) {
+		rfkill_unregister(ipml->rf);
+		rfkill_destroy(ipml->rf);
+	}
+
+	kfree(ipml);
+
+	return 0;
+}
+
+static const struct acpi_device_id cmpc_ipml_device_ids[] = {
+	{CMPC_IPML_HID, 0},
+	{"", 0}
+};
+
+static struct acpi_driver cmpc_ipml_acpi_driver = {
+	.owner = THIS_MODULE,
+	.name = "cmpc",
+	.class = "cmpc",
+	.ids = cmpc_ipml_device_ids,
+	.ops = {
+		.add = cmpc_ipml_add,
+		.remove = cmpc_ipml_remove
+	}
+};
+
+
+/*
+ * Extra keys code.
+ */
+static int cmpc_keys_codes[] = {
+	KEY_UNKNOWN,
+	KEY_WLAN,
+	KEY_SWITCHVIDEOMODE,
+	KEY_BRIGHTNESSDOWN,
+	KEY_BRIGHTNESSUP,
+	KEY_VENDOR,
+	KEY_UNKNOWN,
+	KEY_CAMERA,
+	KEY_BACK,
+	KEY_FORWARD,
+	KEY_MAX
+};
+
+static void cmpc_keys_handler(struct acpi_device *dev, u32 event)
+{
+	struct input_dev *inputdev;
+	int code = KEY_MAX;
+
+	if ((event & 0x0F) < ARRAY_SIZE(cmpc_keys_codes))
+		code = cmpc_keys_codes[event & 0x0F];
+	inputdev = dev_get_drvdata(&dev->dev);
+	input_report_key(inputdev, code, !(event & 0x10));
+	input_sync(inputdev);
+}
+
+static void cmpc_keys_idev_init(struct input_dev *inputdev)
+{
+	int i;
+
+	set_bit(EV_KEY, inputdev->evbit);
+	for (i = 0; cmpc_keys_codes[i] != KEY_MAX; i++)
+		set_bit(cmpc_keys_codes[i], inputdev->keybit);
+}
+
+static int cmpc_keys_add(struct acpi_device *acpi)
+{
+	return cmpc_add_acpi_notify_device(acpi, "cmpc_keys",
+					   cmpc_keys_idev_init);
+}
+
+static int cmpc_keys_remove(struct acpi_device *acpi)
+{
+	return cmpc_remove_acpi_notify_device(acpi);
+}
+
+static const struct acpi_device_id cmpc_keys_device_ids[] = {
+	{CMPC_KEYS_HID, 0},
+	{"", 0}
+};
+
+static struct acpi_driver cmpc_keys_acpi_driver = {
+	.owner = THIS_MODULE,
+	.name = "cmpc_keys",
+	.class = "cmpc_keys",
+	.ids = cmpc_keys_device_ids,
+	.ops = {
+		.add = cmpc_keys_add,
+		.remove = cmpc_keys_remove,
+		.notify = cmpc_keys_handler,
+	}
+};
+
+
+/*
+ * General init/exit code.
+ */
+
+static int cmpc_init(void)
+{
+	int r;
+
+	r = acpi_bus_register_driver(&cmpc_keys_acpi_driver);
+	if (r)
+		goto failed_keys;
+
+	r = acpi_bus_register_driver(&cmpc_ipml_acpi_driver);
+	if (r)
+		goto failed_bl;
+
+	r = acpi_bus_register_driver(&cmpc_tablet_acpi_driver);
+	if (r)
+		goto failed_tablet;
+
+	r = acpi_bus_register_driver(&cmpc_accel_acpi_driver);
+	if (r)
+		goto failed_accel;
+
+	r = acpi_bus_register_driver(&cmpc_accel_acpi_driver_v4);
+	if (r)
+		goto failed_accel_v4;
+
+	return r;
+
+failed_accel_v4:
+	acpi_bus_unregister_driver(&cmpc_accel_acpi_driver);
+
+failed_accel:
+	acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver);
+
+failed_tablet:
+	acpi_bus_unregister_driver(&cmpc_ipml_acpi_driver);
+
+failed_bl:
+	acpi_bus_unregister_driver(&cmpc_keys_acpi_driver);
+
+failed_keys:
+	return r;
+}
+
+static void cmpc_exit(void)
+{
+	acpi_bus_unregister_driver(&cmpc_accel_acpi_driver_v4);
+	acpi_bus_unregister_driver(&cmpc_accel_acpi_driver);
+	acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver);
+	acpi_bus_unregister_driver(&cmpc_ipml_acpi_driver);
+	acpi_bus_unregister_driver(&cmpc_keys_acpi_driver);
+}
+
+module_init(cmpc_init);
+module_exit(cmpc_exit);
+
+static const struct acpi_device_id cmpc_device_ids[] = {
+	{CMPC_ACCEL_HID, 0},
+	{CMPC_ACCEL_HID_V4, 0},
+	{CMPC_TABLET_HID, 0},
+	{CMPC_IPML_HID, 0},
+	{CMPC_KEYS_HID, 0},
+	{"", 0}
+};
+
+MODULE_DEVICE_TABLE(acpi, cmpc_device_ids);