Commit 75971feb authored by Chris Chiu's avatar Chris Chiu Committed by Andy Shevchenko
Browse files

platform/x86: Add Acer Wireless Radio Control driver 



New Acer laptops in 2018 will have a separate ACPI device for
notifications from the airplane mode hotkey. The device name in
the DSDT is SMKB and its ACPI _HID is 10251229.

For these models, when the airplane mode hotkey (Fn+F3) pressed,
a query 0x02 is started in the Embedded Controller, and all this
query does is a notify SMKB with the value 0x80.

        Scope (_SB.PCI0.LPCB.EC0)
        {
                (...)
                Method (_Q02, 0, NotSerialized)  // _Qxx: EC Query
                {
                    HKEV (0x2, One)
		    Notify (SMKB, 0x80)	// Status Change
                }
        }

Based on code from asus-wireless

Signed-off-by: default avatarChris Chiu <chiu@endlessm.com>
Reviewed-by: default avatarJoão Paulo Rechi Vita <jprvita@endlessm.com>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent db2582af

drivers/platform/x86/Kconfig

+14 −0
Original line number Diff line number Diff line
@@ -36,6 +36,20 @@ config ACER_WMI 
	  If you have an ACPI-WMI compatible Acer/ Wistron laptop, say Y or M

	  here.



config ACER_WIRELESS

        tristate "Acer Wireless Radio Control Driver"

        depends on ACPI

        depends on INPUT

        ---help---

          The Acer Wireless Radio Control handles the airplane mode hotkey

          present on new Acer laptops.



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

          hotkey.



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

          called acer-wireless.



config ACERHDF

	tristate "Acer Aspire One temperature and fan driver"

	depends on ACPI && THERMAL

drivers/platform/x86/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ obj-$(CONFIG_DELL_WMI_LED) += dell-wmi-led.o 
obj-$(CONFIG_DELL_SMO8800)	+= dell-smo8800.o

obj-$(CONFIG_DELL_RBTN)		+= dell-rbtn.o

obj-$(CONFIG_ACER_WMI)		+= acer-wmi.o

obj-$(CONFIG_ACER_WIRELESS)	+= acer-wireless.o

obj-$(CONFIG_ACERHDF)		+= acerhdf.o

obj-$(CONFIG_HP_ACCEL)		+= hp_accel.o

obj-$(CONFIG_HP_WIRELESS)	+= hp-wireless.o

drivers/platform/x86/acer-wireless.c

0 → 100644
+71 −0
Original line number Diff line number Diff line 
/*

 * Acer Wireless Radio Control Driver

 *

 * Copyright (C) 2017 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/acpi.h>

#include <linux/input.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/pci_ids.h>

#include <linux/types.h>



static const struct acpi_device_id acer_wireless_acpi_ids[] = {

	{"10251229", 0},

	{"", 0},

};

MODULE_DEVICE_TABLE(acpi, acer_wireless_acpi_ids);



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

{

	struct input_dev *idev = acpi_driver_data(adev);



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

	if (event != 0x80) {

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

		return;

	}

	input_report_key(idev, KEY_RFKILL, 1);

	input_report_key(idev, KEY_RFKILL, 0);

	input_sync(idev);

}



static int acer_wireless_add(struct acpi_device *adev)

{

	struct input_dev *idev;



	idev = devm_input_allocate_device(&adev->dev);

	if (!idev)

		return -ENOMEM;



	adev->driver_data = idev;

	idev->name = "Acer Wireless Radio Control";

	idev->phys = "acer-wireless/input0";

	idev->id.bustype = BUS_HOST;

	idev->id.vendor = PCI_VENDOR_ID_AI;

	idev->id.product = 0x1229;

	set_bit(EV_KEY, idev->evbit);

	set_bit(KEY_RFKILL, idev->keybit);



	return input_register_device(idev);

}



static struct acpi_driver acer_wireless_driver = {

	.name = "Acer Wireless Radio Control Driver",

	.class = "hotkey",

	.ids = acer_wireless_acpi_ids,

	.ops = {

		.add = acer_wireless_add,

		.notify = acer_wireless_notify,

	},

};

module_acpi_driver(acer_wireless_driver);



MODULE_DESCRIPTION("Acer Wireless Radio Control Driver");

MODULE_AUTHOR("Chris Chiu <chiu@gmail.com>");

MODULE_LICENSE("GPL v2");

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