1 files changed, 537 insertions, 72 deletions

diff --git a/drivers/platform/x86/eeepc-wmi.c b/drivers/platform/x86/eeepc-wmi.c
index 0d50fbbe2478..4d38f98aa976 100644
--- a/drivers/platform/x86/eeepc-wmi.c
+++ b/drivers/platform/x86/eeepc-wmi.c
@@ -2,6 +2,7 @@
  * Eee PC WMI hotkey driver
  *
  * Copyright(C) 2010 Intel Corporation.
+ * Copyright(C) 2010 Corentin Chary <corentin.chary@gmail.com>
  *
  * Portions based on wistron_btns.c:
  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
@@ -34,6 +35,10 @@
 #include <linux/input/sparse-keymap.h>
 #include <linux/fb.h>
 #include <linux/backlight.h>
+#include <linux/leds.h>
+#include <linux/rfkill.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
 #include <linux/platform_device.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
@@ -44,6 +49,8 @@ MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>");
 MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
 MODULE_LICENSE("GPL");
 
+#define EEEPC_ACPI_HID		"ASUS010" /* old _HID used in eeepc-laptop */
+
 #define EEEPC_WMI_EVENT_GUID	"ABBC0F72-8EA1-11D1-00A0-C90629100000"
 #define EEEPC_WMI_MGMT_GUID	"97845ED0-4E6D-11DE-8A39-0800200C9A66"
 
@@ -60,6 +67,10 @@ MODULE_ALIAS("wmi:"EEEPC_WMI_MGMT_GUID);
 #define EEEPC_WMI_METHODID_CFVS	0x53564643
 
 #define EEEPC_WMI_DEVID_BACKLIGHT	0x00050012
+#define EEEPC_WMI_DEVID_TPDLED		0x00100011
+#define EEEPC_WMI_DEVID_WLAN		0x00010011
+#define EEEPC_WMI_DEVID_BLUETOOTH	0x00010013
+#define EEEPC_WMI_DEVID_WWAN3G		0x00010019
 
 static const struct key_entry eeepc_wmi_keymap[] = {
 	/* Sleep already handled via generic ACPI code */
@@ -83,11 +94,37 @@ struct bios_args {
 	u32	ctrl_param;
 };
 
+/*
+ * eeepc-wmi/    - debugfs root directory
+ *   dev_id      - current dev_id
+ *   ctrl_param  - current ctrl_param
+ *   devs        - call DEVS(dev_id, ctrl_param) and print result
+ *   dsts        - call DSTS(dev_id)  and print result
+ */
+struct eeepc_wmi_debug {
+	struct dentry *root;
+	u32 dev_id;
+	u32 ctrl_param;
+};
+
 struct eeepc_wmi {
 	struct input_dev *inputdev;
 	struct backlight_device *backlight_device;
+	struct platform_device *platform_device;
+
+	struct led_classdev tpd_led;
+	int tpd_led_wk;
+	struct workqueue_struct *led_workqueue;
+	struct work_struct tpd_led_work;
+
+	struct rfkill *wlan_rfkill;
+	struct rfkill *bluetooth_rfkill;
+	struct rfkill *wwan3g_rfkill;
+
+	struct eeepc_wmi_debug debug;
 };
 
+/* Only used in eeepc_wmi_init() and eeepc_wmi_exit() */
 static struct platform_device *platform_device;
 
 static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc)
@@ -101,7 +138,7 @@ static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc)
 	eeepc->inputdev->name = "Eee PC WMI hotkeys";
 	eeepc->inputdev->phys = EEEPC_WMI_FILE "/input0";
 	eeepc->inputdev->id.bustype = BUS_HOST;
-	eeepc->inputdev->dev.parent = &platform_device->dev;
+	eeepc->inputdev->dev.parent = &eeepc->platform_device->dev;
 
 	err = sparse_keymap_setup(eeepc->inputdev, eeepc_wmi_keymap, NULL);
 	if (err)
@@ -130,7 +167,7 @@ static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc)
 	eeepc->inputdev = NULL;
 }
 
-static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *ctrl_param)
+static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *retval)
 {
 	struct acpi_buffer input = { (acpi_size)sizeof(u32), &dev_id };
 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -150,8 +187,8 @@ static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *ctrl_param)
 	else
 		tmp = 0;
 
-	if (ctrl_param)
-		*ctrl_param = tmp;
+	if (retval)
+		*retval = tmp;
 
 	kfree(obj);
 
@@ -159,7 +196,8 @@ static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *ctrl_param)
 
 }
 
-static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param)
+static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
+					  u32 *retval)
 {
 	struct bios_args args = {
 		.dev_id = dev_id,
@@ -168,34 +206,281 @@ static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param)
 	struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
 	acpi_status status;
 
-	status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID,
-			1, EEEPC_WMI_METHODID_DEVS, &input, NULL);
+	if (!retval) {
+		status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1,
+					     EEEPC_WMI_METHODID_DEVS,
+					     &input, NULL);
+	} else {
+		struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+		union acpi_object *obj;
+		u32 tmp;
+
+		status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1,
+					     EEEPC_WMI_METHODID_DEVS,
+					     &input, &output);
+
+		if (ACPI_FAILURE(status))
+			return status;
+
+		obj = (union acpi_object *)output.pointer;
+		if (obj && obj->type == ACPI_TYPE_INTEGER)
+			tmp = (u32)obj->integer.value;
+		else
+			tmp = 0;
+
+		*retval = tmp;
+
+		kfree(obj);
+	}
 
 	return status;
 }
 
+/*
+ * LEDs
+ */
+/*
+ * These functions actually update the LED's, and are called from a
+ * workqueue. By doing this as separate work rather than when the LED
+ * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a
+ * potentially bad time, such as a timer interrupt.
+ */
+static void tpd_led_update(struct work_struct *work)
+{
+	int ctrl_param;
+	struct eeepc_wmi *eeepc;
+
+	eeepc = container_of(work, struct eeepc_wmi, tpd_led_work);
+
+	ctrl_param = eeepc->tpd_led_wk;
+	eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TPDLED, ctrl_param, NULL);
+}
+
+static void tpd_led_set(struct led_classdev *led_cdev,
+			enum led_brightness value)
+{
+	struct eeepc_wmi *eeepc;
+
+	eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led);
+
+	eeepc->tpd_led_wk = !!value;
+	queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
+}
+
+static int read_tpd_state(struct eeepc_wmi *eeepc)
+{
+	u32 retval;
+	acpi_status status;
+
+	status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_TPDLED, &retval);
+
+	if (ACPI_FAILURE(status))
+		return -1;
+	else if (!retval || retval == 0x00060000)
+		/*
+		 * if touchpad led is present, DSTS will set some bits,
+		 * usually 0x00020000.
+		 * 0x00060000 means that the device is not supported
+		 */
+		return -ENODEV;
+	else
+		/* Status is stored in the first bit */
+		return retval & 0x1;
+}
+
+static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
+{
+	struct eeepc_wmi *eeepc;
+
+	eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led);
+
+	return read_tpd_state(eeepc);
+}
+
+static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc)
+{
+	int rv;
+
+	if (read_tpd_state(eeepc) < 0)
+		return 0;
+
+	eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
+	if (!eeepc->led_workqueue)
+		return -ENOMEM;
+	INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
+
+	eeepc->tpd_led.name = "eeepc::touchpad";
+	eeepc->tpd_led.brightness_set = tpd_led_set;
+	eeepc->tpd_led.brightness_get = tpd_led_get;
+	eeepc->tpd_led.max_brightness = 1;
+
+	rv = led_classdev_register(&eeepc->platform_device->dev,
+				   &eeepc->tpd_led);
+	if (rv) {
+		destroy_workqueue(eeepc->led_workqueue);
+		return rv;
+	}
+
+	return 0;
+}
+
+static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc)
+{
+	if (eeepc->tpd_led.dev)
+		led_classdev_unregister(&eeepc->tpd_led);
+	if (eeepc->led_workqueue)
+		destroy_workqueue(eeepc->led_workqueue);
+}
+
+/*
+ * Rfkill devices
+ */
+static int eeepc_rfkill_set(void *data, bool blocked)
+{
+	int dev_id = (unsigned long)data;
+	u32 ctrl_param = !blocked;
+
+	return eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL);
+}
+
+static void eeepc_rfkill_query(struct rfkill *rfkill, void *data)
+{
+	int dev_id = (unsigned long)data;
+	u32 retval;
+	acpi_status status;
+
+	status = eeepc_wmi_get_devstate(dev_id, &retval);
+
+	if (ACPI_FAILURE(status))
+		return ;
+
+	rfkill_set_sw_state(rfkill, !(retval & 0x1));
+}
+
+static const struct rfkill_ops eeepc_rfkill_ops = {
+	.set_block = eeepc_rfkill_set,
+	.query = eeepc_rfkill_query,
+};
+
+static int eeepc_new_rfkill(struct eeepc_wmi *eeepc,
+			    struct rfkill **rfkill,
+			    const char *name,
+			    enum rfkill_type type, int dev_id)
+{
+	int result;
+	u32 retval;
+	acpi_status status;
+
+	status = eeepc_wmi_get_devstate(dev_id, &retval);
+
+	if (ACPI_FAILURE(status))
+		return -1;
+
+	/* If the device is present, DSTS will always set some bits
+	 * 0x00070000 - 1110000000000000000 - device supported
+	 * 0x00060000 - 1100000000000000000 - not supported
+	 * 0x00020000 - 0100000000000000000 - device supported
+	 * 0x00010000 - 0010000000000000000 - not supported / special mode ?
+	 */
+	if (!retval || retval == 0x00060000)
+		return -ENODEV;
+
+	*rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
+			       &eeepc_rfkill_ops, (void *)(long)dev_id);
+
+	if (!*rfkill)
+		return -EINVAL;
+
+	rfkill_init_sw_state(*rfkill, !(retval & 0x1));
+	result = rfkill_register(*rfkill);
+	if (result) {
+		rfkill_destroy(*rfkill);
+		*rfkill = NULL;
+		return result;
+	}
+	return 0;
+}
+
+static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc)
+{
+	if (eeepc->wlan_rfkill) {
+		rfkill_unregister(eeepc->wlan_rfkill);
+		rfkill_destroy(eeepc->wlan_rfkill);
+		eeepc->wlan_rfkill = NULL;
+	}
+	if (eeepc->bluetooth_rfkill) {
+		rfkill_unregister(eeepc->bluetooth_rfkill);
+		rfkill_destroy(eeepc->bluetooth_rfkill);
+		eeepc->bluetooth_rfkill = NULL;
+	}
+	if (eeepc->wwan3g_rfkill) {
+		rfkill_unregister(eeepc->wwan3g_rfkill);
+		rfkill_destroy(eeepc->wwan3g_rfkill);
+		eeepc->wwan3g_rfkill = NULL;
+	}
+}
+
+static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc)
+{
+	int result = 0;
+
+	result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
+				  "eeepc-wlan", RFKILL_TYPE_WLAN,
+				  EEEPC_WMI_DEVID_WLAN);
+
+	if (result && result != -ENODEV)
+		goto exit;
+
+	result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
+				  "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
+				  EEEPC_WMI_DEVID_BLUETOOTH);
+
+	if (result && result != -ENODEV)
+		goto exit;
+
+	result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
+				  "eeepc-wwan3g", RFKILL_TYPE_WWAN,
+				  EEEPC_WMI_DEVID_WWAN3G);
+
+	if (result && result != -ENODEV)
+		goto exit;
+
+exit:
+	if (result && result != -ENODEV)
+		eeepc_wmi_rfkill_exit(eeepc);
+
+	if (result == -ENODEV)
+		result = 0;
+
+	return result;
+}
+
+/*
+ * Backlight
+ */
 static int read_brightness(struct backlight_device *bd)
 {
-	static u32 ctrl_param;
+	u32 retval;
 	acpi_status status;
 
-	status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BACKLIGHT, &ctrl_param);
+	status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BACKLIGHT, &retval);
 
 	if (ACPI_FAILURE(status))
 		return -1;
 	else
-		return ctrl_param & 0xFF;
+		return retval & 0xFF;
 }
 
 static int update_bl_status(struct backlight_device *bd)
 {
 
-	static u32 ctrl_param;
+	u32 ctrl_param;
 	acpi_status status;
 
 	ctrl_param = bd->props.brightness;
 
-	status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT, ctrl_param);
+	status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT,
+					ctrl_param, NULL);
 
 	if (ACPI_FAILURE(status))
 		return -1;
@@ -234,7 +519,7 @@ static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc)
 	memset(&props, 0, sizeof(struct backlight_properties));
 	props.max_brightness = 15;
 	bd = backlight_device_register(EEEPC_WMI_FILE,
-				       &platform_device->dev, eeepc,
+				       &eeepc->platform_device->dev, eeepc,
 				       &eeepc_wmi_bl_ops, &props);
 	if (IS_ERR(bd)) {
 		pr_err("Could not register backlight device\n");
@@ -321,65 +606,240 @@ static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
 
 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
 
+static struct attribute *platform_attributes[] = {
+	&dev_attr_cpufv.attr,
+	NULL
+};
+
+static struct attribute_group platform_attribute_group = {
+	.attrs = platform_attributes
+};
+
 static void eeepc_wmi_sysfs_exit(struct platform_device *device)
 {
-	device_remove_file(&device->dev, &dev_attr_cpufv);
+	sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
 }
 
 static int eeepc_wmi_sysfs_init(struct platform_device *device)
 {
-	int retval = -ENOMEM;
+	return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
+}
 
-	retval = device_create_file(&device->dev, &dev_attr_cpufv);
-	if (retval)
-		goto error_sysfs;
+/*
+ * Platform device
+ */
+static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc)
+{
+	int err;
 
+	eeepc->platform_device = platform_device_alloc(EEEPC_WMI_FILE, -1);
+	if (!eeepc->platform_device)
+		return -ENOMEM;
+	platform_set_drvdata(eeepc->platform_device, eeepc);
+
+	err = platform_device_add(eeepc->platform_device);
+	if (err)
+		goto fail_platform_device;
+
+	err = eeepc_wmi_sysfs_init(eeepc->platform_device);
+	if (err)
+		goto fail_sysfs;
 	return 0;
 
-error_sysfs:
-	eeepc_wmi_sysfs_exit(platform_device);
-	return retval;
+fail_sysfs:
+	platform_device_del(eeepc->platform_device);
+fail_platform_device:
+	platform_device_put(eeepc->platform_device);
+	return err;
 }
 
-static int __devinit eeepc_wmi_platform_probe(struct platform_device *device)
+static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc)
 {
+	eeepc_wmi_sysfs_exit(eeepc->platform_device);
+	platform_device_unregister(eeepc->platform_device);
+}
+
+/*
+ * debugfs
+ */
+struct eeepc_wmi_debugfs_node {
 	struct eeepc_wmi *eeepc;
-	int err;
+	char *name;
+	int (*show)(struct seq_file *m, void *data);
+};
+
+static int show_dsts(struct seq_file *m, void *data)
+{
+	struct eeepc_wmi *eeepc = m->private;
 	acpi_status status;
+	u32 retval = -1;
 
-	eeepc = platform_get_drvdata(device);
+	status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval);
+
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval);
+
+	return 0;
+}
+
+static int show_devs(struct seq_file *m, void *data)
+{
+	struct eeepc_wmi *eeepc = m->private;
+	acpi_status status;
+	u32 retval = -1;
+
+	status = eeepc_wmi_set_devstate(eeepc->debug.dev_id,
+					eeepc->debug.ctrl_param, &retval);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id,
+		   eeepc->debug.ctrl_param, retval);
+
+	return 0;
+}
+
+static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = {
+	{ NULL, "devs", show_devs },
+	{ NULL, "dsts", show_dsts },
+};
+
+static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file)
+{
+	struct eeepc_wmi_debugfs_node *node = inode->i_private;
+
+	return single_open(file, node->show, node->eeepc);
+}
+
+static const struct file_operations eeepc_wmi_debugfs_io_ops = {
+	.owner = THIS_MODULE,
+	.open  = eeepc_wmi_debugfs_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc)
+{
+	debugfs_remove_recursive(eeepc->debug.root);
+}
+
+static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc)
+{
+	struct dentry *dent;
+	int i;
+
+	eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL);
+	if (!eeepc->debug.root) {
+		pr_err("failed to create debugfs directory");
+		goto error_debugfs;
+	}
+
+	dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR,
+				  eeepc->debug.root, &eeepc->debug.dev_id);
+	if (!dent)
+		goto error_debugfs;
+
+	dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR,
+				  eeepc->debug.root, &eeepc->debug.ctrl_param);
+	if (!dent)
+		goto error_debugfs;
+
+	for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) {
+		struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i];
+
+		node->eeepc = eeepc;
+		dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
+					   eeepc->debug.root, node,
+					   &eeepc_wmi_debugfs_io_ops);
+		if (!dent) {
+			pr_err("failed to create debug file: %s\n", node->name);
+			goto error_debugfs;
+		}
+	}
+
+	return 0;
+
+error_debugfs:
+	eeepc_wmi_debugfs_exit(eeepc);
+	return -ENOMEM;
+}
+
+/*
+ * WMI Driver
+ */
+static struct platform_device * __init eeepc_wmi_add(void)
+{
+	struct eeepc_wmi *eeepc;
+	acpi_status status;
+	int err;
+
+	eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL);
+	if (!eeepc)
+		return ERR_PTR(-ENOMEM);
+
+	/*
+	 * Register the platform device first.  It is used as a parent for the
+	 * sub-devices below.
+	 */
+	err = eeepc_wmi_platform_init(eeepc);
+	if (err)
+		goto fail_platform;
 
 	err = eeepc_wmi_input_init(eeepc);
 	if (err)
-		goto error_input;
+		goto fail_input;
+
+	err = eeepc_wmi_led_init(eeepc);
+	if (err)
+		goto fail_leds;
+
+	err = eeepc_wmi_rfkill_init(eeepc);
+	if (err)
+		goto fail_rfkill;
 
 	if (!acpi_video_backlight_support()) {
 		err = eeepc_wmi_backlight_init(eeepc);
 		if (err)
-			goto error_backlight;
+			goto fail_backlight;
 	} else
 		pr_info("Backlight controlled by ACPI video driver\n");
 
 	status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
-					eeepc_wmi_notify, eeepc);
+					    eeepc_wmi_notify, eeepc);
 	if (ACPI_FAILURE(status)) {
 		pr_err("Unable to register notify handler - %d\n",
 			status);
 		err = -ENODEV;
-		goto error_wmi;
+		goto fail_wmi_handler;
 	}
 
-	return 0;
+	err = eeepc_wmi_debugfs_init(eeepc);
+	if (err)
+		goto fail_debugfs;
 
-error_wmi:
+	return eeepc->platform_device;
+
+fail_debugfs:
+	wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
+fail_wmi_handler:
 	eeepc_wmi_backlight_exit(eeepc);
-error_backlight:
+fail_backlight:
+	eeepc_wmi_rfkill_exit(eeepc);
+fail_rfkill:
+	eeepc_wmi_led_exit(eeepc);
+fail_leds:
 	eeepc_wmi_input_exit(eeepc);
-error_input:
-	return err;
+fail_input:
+	eeepc_wmi_platform_exit(eeepc);
+fail_platform:
+	kfree(eeepc);
+	return ERR_PTR(err);
 }
 
-static int __devexit eeepc_wmi_platform_remove(struct platform_device *device)
+static int eeepc_wmi_remove(struct platform_device *device)
 {
 	struct eeepc_wmi *eeepc;
 
@@ -387,7 +847,12 @@ static int __devexit eeepc_wmi_platform_remove(struct platform_device *device)
 	wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
 	eeepc_wmi_backlight_exit(eeepc);
 	eeepc_wmi_input_exit(eeepc);
+	eeepc_wmi_led_exit(eeepc);
+	eeepc_wmi_rfkill_exit(eeepc);
+	eeepc_wmi_debugfs_exit(eeepc);
+	eeepc_wmi_platform_exit(eeepc);
 
+	kfree(eeepc);
 	return 0;
 }
 
@@ -396,13 +861,31 @@ static struct platform_driver platform_driver = {
 		.name = EEEPC_WMI_FILE,
 		.owner = THIS_MODULE,
 	},
-	.probe = eeepc_wmi_platform_probe,
-	.remove = __devexit_p(eeepc_wmi_platform_remove),
 };
 
+static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level,
+						 void *context, void **retval)
+{
+	pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID);
+	*(bool *)context = true;
+	return AE_CTRL_TERMINATE;
+}
+
+static int __init eeepc_wmi_check_atkd(void)
+{
+	acpi_status status;
+	bool found = false;
+
+	status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
+				  &found, NULL);
+
+	if (ACPI_FAILURE(status) || !found)
+		return 0;
+	return -1;
+}
+
 static int __init eeepc_wmi_init(void)
 {
-	struct eeepc_wmi *eeepc;
 	int err;
 
 	if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) ||
@@ -411,58 +894,40 @@ static int __init eeepc_wmi_init(void)
 		return -ENODEV;
 	}
 
-	eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL);
-	if (!eeepc)
-		return -ENOMEM;
-
-	platform_device = platform_device_alloc(EEEPC_WMI_FILE, -1);
-	if (!platform_device) {
-		pr_warning("Unable to allocate platform device\n");
-		err = -ENOMEM;
-		goto fail_platform;
+	if (eeepc_wmi_check_atkd()) {
+		pr_warning("WMI device present, but legacy ATKD device is also "
+			   "present and enabled.");
+		pr_warning("You probably booted with acpi_osi=\"Linux\" or "
+			   "acpi_osi=\"!Windows 2009\"");
+		pr_warning("Can't load eeepc-wmi, use default acpi_osi "
+			   "(preferred) or eeepc-laptop");
+		return -ENODEV;
 	}
 
-	err = platform_device_add(platform_device);
-	if (err) {
-		pr_warning("Unable to add platform device\n");
-		goto put_dev;
+	platform_device = eeepc_wmi_add();
+	if (IS_ERR(platform_device)) {
+		err = PTR_ERR(platform_device);
+		goto fail_eeepc_wmi;
 	}
 
-	platform_set_drvdata(platform_device, eeepc);
-
 	err = platform_driver_register(&platform_driver);
 	if (err) {
 		pr_warning("Unable to register platform driver\n");
-		goto del_dev;
+		goto fail_platform_driver;
 	}
 
-	err = eeepc_wmi_sysfs_init(platform_device);
-	if (err)
-		goto del_sysfs;
-
 	return 0;
 
-del_sysfs:
-	eeepc_wmi_sysfs_exit(platform_device);
-del_dev:
-	platform_device_del(platform_device);
-put_dev:
-	platform_device_put(platform_device);
-fail_platform:
-	kfree(eeepc);
-
+fail_platform_driver:
+	eeepc_wmi_remove(platform_device);
+fail_eeepc_wmi:
 	return err;
 }
 
 static void __exit eeepc_wmi_exit(void)
 {
-	struct eeepc_wmi *eeepc;
-
-	eeepc_wmi_sysfs_exit(platform_device);
-	eeepc = platform_get_drvdata(platform_device);
+	eeepc_wmi_remove(platform_device);
 	platform_driver_unregister(&platform_driver);
-	platform_device_unregister(platform_device);
-	kfree(eeepc);
 }
 
 module_init(eeepc_wmi_init);