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: João Paulo Rechi Vita <jprv...@endlessm.com>
---
MAINTAINERS | 6 ++
drivers/platform/x86/Kconfig | 15 +++++
drivers/platform/x86/Makefile | 1 +
drivers/platform/x86/asus-wrc.c | 118 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 140 insertions(+)
create mode 100644 drivers/platform/x86/asus-wrc.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 9bff63c..b9849ea 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -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 <jprv...@gmail.com>
+L: platform-driver-x86@vger.kernel.org
+S: Maintained
+F: drivers/platform/x86/asus-wrc.c
+
ASYNCHRONOUS TRANSFERS/TRANSFORMS (IOAT) API
R: Dan Williams <dan.j.willi...@intel.com>
W: http://sourceforge.net/projects/xscaleiop
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 1089eaa..edd5de4 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -587,6 +587,21 @@ config EEEPC_WMI
If you have an ACPI-WMI compatible Eee PC laptop (>= 1000), say Y or M
here.
+config ASUS_WRC
+ tristate "Asus Wireless Radio Control Driver"
+ depends on ACPI
+ depends on INPUT
+ select INPUT_SPARSEKMAP
+ ---help---
+ The Asus Wireless Radio Control handles the airplane mode hotkey
+ present on some Asus laptops, known as ASHS in the DSDT.
+
+ 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-wrc.
+
config ACPI_WMI
tristate "WMI"
depends on ACPI
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 3ca78a3..98b5c2d 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -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_WRC) += asus-wrc.o
obj-$(CONFIG_EEEPC_LAPTOP) += eeepc-laptop.o
obj-$(CONFIG_EEEPC_WMI) += eeepc-wmi.o
obj-$(CONFIG_MSI_LAPTOP) += msi-laptop.o
diff --git a/drivers/platform/x86/asus-wrc.c b/drivers/platform/x86/asus-wrc.c
new file mode 100644
index 0000000..13a2022
--- /dev/null
+++ b/drivers/platform/x86/asus-wrc.c
@@ -0,0 +1,118 @@
+/*
+ * Asus Wireless Radio Control Driver
+ *
+ * Copyright (C) 2015 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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#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/input/sparse-keymap.h>
+
+#define ASUS_WRC_MODULE_NAME "Asus Wireless Radio Control Driver"
+
+struct asus_wrc_data {
+ struct input_dev *inputdev;
+};
+
+static const struct key_entry asus_wrc_keymap[] = {
+ { KE_KEY, 0x88, { KEY_RFKILL } },
+ { KE_END, 0 }
+};
+
+static void asus_wrc_notify(struct acpi_device *device, u32 event)
+{
+ struct asus_wrc_data *data = acpi_driver_data(device);
+
+ pr_debug("event=0x%X\n", event);
+
+ if (!sparse_keymap_report_event(data->inputdev, event, 1, true))
+ pr_info("Unknown ASHS event: 0x%X\n", event);
+}
+
+static int asus_wrc_add(struct acpi_device *device)
+{
+ struct asus_wrc_data *data;
+ int err = -ENOMEM;
+
+ pr_info(ASUS_WRC_MODULE_NAME"\n");
+
+ data = kzalloc(sizeof(struct asus_wrc_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->inputdev = input_allocate_device();
+ if (!data->inputdev)
+ goto fail;
+
+ data->inputdev->name = "Asus Wireless Radio Control";
+ data->inputdev->phys = "asus-wrc/input0";
+ data->inputdev->id.bustype = BUS_HOST;
+ data->inputdev->dev.parent = &device->dev;
+ set_bit(EV_REP, data->inputdev->evbit);
+
+ err = sparse_keymap_setup(data->inputdev, asus_wrc_keymap, NULL);
+ if (err)
+ goto fail;
+
+ err = input_register_device(data->inputdev);
+ if (err)
+ goto fail;
+
+ device->driver_data = data;
+ return 0;
+
+fail:
+ device->driver->ops.remove(device);
+ return err;
+}
+
+static int asus_wrc_remove(struct acpi_device *device)
+{
+ struct asus_wrc_data *data = acpi_driver_data(device);
+
+ pr_info("Removing "ASUS_WRC_MODULE_NAME"\n");
+
+ if (data) {
+ if (data->inputdev) {
+ sparse_keymap_free(data->inputdev);
+ input_unregister_device(data->inputdev);
+ data->inputdev = NULL;
+ }
+
+ kfree(data);
+ data = NULL;
+ }
+ return 0;
+}
+
+static const struct acpi_device_id device_ids[] = {
+ {"ATK4002", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, device_ids);
+
+static struct acpi_driver asus_wrc_driver = {
+ .name = ASUS_WRC_MODULE_NAME,
+ .class = "hotkey",
+ .ids = device_ids,
+ .ops = {
+ .add = asus_wrc_add,
+ .remove = asus_wrc_remove,
+ .notify = asus_wrc_notify,
+ },
+};
+module_acpi_driver(asus_wrc_driver);
+
+MODULE_DESCRIPTION(ASUS_WRC_MODULE_NAME);
+MODULE_AUTHOR("João Paulo Rechi Vita <jprv...@gmail.com>");
+MODULE_LICENSE("GPL");
--
2.5.0
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