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authorJoão Paulo Rechi Vita <jprvita@gmail.com>2016-01-05 19:16:53 +0300
committerDarren Hart <dvhart@linux.intel.com>2016-01-20 04:35:46 +0300
commitf6a6bbae0471fdfb824a86d1808eae33e8819254 (patch)
tree0cf526582eba31b0d5d596efd93f3909f4bdf0c8 /drivers/platform/x86/asus-wireless.c
parentf5b3f66548b72f8ab77fea5867bd45ad91ed2143 (diff)
downloadlinux-f6a6bbae0471fdfb824a86d1808eae33e8819254.tar.xz
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: João Paulo Rechi Vita <jprvita@endlessm.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Diffstat (limited to 'drivers/platform/x86/asus-wireless.c')
-rw-r--r--drivers/platform/x86/asus-wireless.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/drivers/platform/x86/asus-wireless.c b/drivers/platform/x86/asus-wireless.c
new file mode 100644
index 000000000000..5058d48f2909
--- /dev/null
+++ b/drivers/platform/x86/asus-wireless.c
@@ -0,0 +1,83 @@
+/*
+ * 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");