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Commit f6a6bbae authored by João Paulo Rechi Vita's avatar João Paulo Rechi Vita Committed by Darren Hart
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platform/x86: Add Asus Wireless Radio Control driver 



Some Asus notebooks like the Asus E202SA and the Asus X555UB have a
separate ACPI device for notifications from the airplane mode hotkey.
This device is called "Wireless Radio Control" in Asus websites and ASHS
in the DSDT, and its ACPI _HID is ATK4002 in the two models mentioned
above.

For these models, when the airplane mode hotkey (Fn+F2) is pressed, a
query 0x0B is started in the Embedded Controller, and all this query does
is a notify ASHS with the value 0x88 (for acpi_osi >= "Windows 2012"):

	Scope (_SB.PCI0.SBRG.EC0)
	{
		(...)
		Method (_Q0B, 0, NotSerialized)  // _Qxx: EC Query
		{
			If ((MSOS () >= OSW8))
			{
				Notify (ASHS, 0x88) // Device-Specific
			}
			Else
			{
				(...)
			}
		}
	}

Signed-off-by: default avatarJoão Paulo Rechi Vita <jprvita@endlessm.com>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: default avatarDarren Hart <dvhart@linux.intel.com>
parent f5b3f665

MAINTAINERS

+6 −0
Original line number Diff line number Diff line
@@ -1791,6 +1791,12 @@ S: Maintained 
F:	drivers/platform/x86/asus*.c

F:	drivers/platform/x86/eeepc*.c



ASUS WIRELESS RADIO CONTROL DRIVER

M:	João Paulo Rechi Vita <jprvita@gmail.com>

L:	platform-driver-x86@vger.kernel.org

S:	Maintained

F:	drivers/platform/x86/asus-wireless.c



ASYNCHRONOUS TRANSFERS/TRANSFORMS (IOAT) API

R:	Dan Williams <dan.j.williams@intel.com>

W:	http://sourceforge.net/projects/xscaleiop

drivers/platform/x86/Kconfig

+14 −0
Original line number Diff line number Diff line
@@ -587,6 +587,20 @@ config EEEPC_WMI 
	  If you have an ACPI-WMI compatible Eee PC laptop (>= 1000), say Y or M

	  here.



config ASUS_WIRELESS

	tristate "Asus Wireless Radio Control Driver"

	depends on ACPI

	depends on INPUT

	---help---

	  The Asus Wireless Radio Control handles the airplane mode hotkey

	  present on some Asus laptops.



	  Say Y or M here if you have an ASUS notebook with an airplane mode

	  hotkey.



	  If you choose to compile this driver as a module the module will be

	  called asus-wireless.



config ACPI_WMI

	tristate "WMI"

	depends on ACPI

drivers/platform/x86/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
obj-$(CONFIG_ASUS_LAPTOP)	+= asus-laptop.o

obj-$(CONFIG_ASUS_WMI)		+= asus-wmi.o

obj-$(CONFIG_ASUS_NB_WMI)	+= asus-nb-wmi.o

obj-$(CONFIG_ASUS_WIRELESS)	+= asus-wireless.o

obj-$(CONFIG_EEEPC_LAPTOP)	+= eeepc-laptop.o

obj-$(CONFIG_EEEPC_WMI)		+= eeepc-wmi.o

obj-$(CONFIG_MSI_LAPTOP)	+= msi-laptop.o

drivers/platform/x86/asus-wireless.c

0 → 100644
+83 −0
Original line number Diff line number Diff line 
/*

 * Asus Wireless Radio Control Driver

 *

 * Copyright (C) 2015-2016 Endless Mobile, Inc.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */



#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/types.h>

#include <linux/acpi.h>

#include <linux/input.h>

#include <linux/pci_ids.h>



struct asus_wireless_data {

	struct input_dev *idev;

};



static void asus_wireless_notify(struct acpi_device *adev, u32 event)

{

	struct asus_wireless_data *data = acpi_driver_data(adev);



	dev_dbg(&adev->dev, "event=%#x\n", event);

	if (event != 0x88) {

		dev_notice(&adev->dev, "Unknown ASHS event: %#x\n", event);

		return;

	}

	input_report_key(data->idev, KEY_RFKILL, 1);

	input_report_key(data->idev, KEY_RFKILL, 0);

	input_sync(data->idev);

}



static int asus_wireless_add(struct acpi_device *adev)

{

	struct asus_wireless_data *data;



	data = devm_kzalloc(&adev->dev, sizeof(*data), GFP_KERNEL);

	if (!data)

		return -ENOMEM;

	adev->driver_data = data;



	data->idev = devm_input_allocate_device(&adev->dev);

	if (!data->idev)

		return -ENOMEM;

	data->idev->name = "Asus Wireless Radio Control";

	data->idev->phys = "asus-wireless/input0";

	data->idev->id.bustype = BUS_HOST;

	data->idev->id.vendor = PCI_VENDOR_ID_ASUSTEK;

	set_bit(EV_KEY, data->idev->evbit);

	set_bit(KEY_RFKILL, data->idev->keybit);

	return input_register_device(data->idev);

}



static int asus_wireless_remove(struct acpi_device *adev)

{

	return 0;

}



static const struct acpi_device_id device_ids[] = {

	{"ATK4002", 0},

	{"", 0},

};

MODULE_DEVICE_TABLE(acpi, device_ids);



static struct acpi_driver asus_wireless_driver = {

	.name = "Asus Wireless Radio Control Driver",

	.class = "hotkey",

	.ids = device_ids,

	.ops = {

		.add = asus_wireless_add,

		.remove = asus_wireless_remove,

		.notify = asus_wireless_notify,

	},

};

module_acpi_driver(asus_wireless_driver);



MODULE_DESCRIPTION("Asus Wireless Radio Control Driver");

MODULE_AUTHOR("João Paulo Rechi Vita <jprvita@gmail.com>");

MODULE_LICENSE("GPL");