Signed-off-by: Alex Hung <alex.hung@xxxxxxxxxxxxx>
---
drivers/platform/x86/Kconfig | 12 +++
drivers/platform/x86/Makefile | 1 +
drivers/platform/x86/dell-wireless.c | 159 ++++++++++++++++++++++++++++++++++
3 files changed, 172 insertions(+)
create mode 100644 drivers/platform/x86/dell-wireless.c
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 172f26c..919df0b 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -228,6 +228,18 @@ config HP_WIRELESS
To compile this driver as a module, choose M here: the module will
be called hp-wireless.
+config DELL_WIRELESS
+ tristate "DELL wireless button"
+ depends on ACPI
+ depends on INPUT
+ help
+ This driver provides supports for new DELL wireless button for Windows
+ 8. On such systems the driver should load automatically (via ACPI
+ alias).
+
+ To compile this driver as a module, choose M here: the module will
+ be called dell-wireless.
+
config HP_WMI
tristate "HP WMI extras"
depends on ACPI_WMI
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index c4ca428..09b382b 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_DELL_LAPTOP) += dell-laptop.o
obj-$(CONFIG_DELL_WMI) += dell-wmi.o
obj-$(CONFIG_DELL_WMI_AIO) += dell-wmi-aio.o
obj-$(CONFIG_DELL_SMO8800) += dell-smo8800.o
+obj-$(CONFIG_DELL_WIRELESS) += dell-wireless.o
obj-$(CONFIG_ACER_WMI) += acer-wmi.o
obj-$(CONFIG_ACERHDF) += acerhdf.o
obj-$(CONFIG_HP_ACCEL) += hp_accel.o
diff --git a/drivers/platform/x86/dell-wireless.c b/drivers/platform/x86/dell-wireless.c
new file mode 100644
index 0000000..c1545fb
--- /dev/null
+++ b/drivers/platform/x86/dell-wireless.c
@@ -0,0 +1,159 @@
+/*
+ * dell-wireless button for Windows 8
+ *
+ * Copyright (C) 2014 Alex Hung
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/acpi.h>
+#include <acpi/acpi_bus.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Alex Hung");
+MODULE_ALIAS("acpi*:DELLABCE:*");
+
+#define DELL_TOGGLE_SWITCH 0
+#define DELL_SLIDER_SWITCH 1
+
+static int switch_type;
+
+static struct input_dev *dellwl_input_dev;
+
+static const struct acpi_device_id dellwl_ids[] = {
+ {"DELLABCE", 0},
+ {"", 0},
+};
+
+static int dell_wireless_input_setup(void)
+{
+ int err;
+
+ dellwl_input_dev = input_allocate_device();
+ if (!dellwl_input_dev)
+ return -ENOMEM;
+
+ dellwl_input_dev->name = "DELL Wireless hotkeys";
+ dellwl_input_dev->phys = "dellabce/input0";
+ dellwl_input_dev->id.bustype = BUS_HOST;
+ dellwl_input_dev->evbit[0] = BIT(EV_KEY);
+ set_bit(KEY_RFKILL, dellwl_input_dev->keybit);
+
+ err = input_register_device(dellwl_input_dev);
+ if (err)
+ goto err_free_dev;
+
+ return 0;
+
+err_free_dev:
+ input_free_device(dellwl_input_dev);
+ return err;
+}
+
+static void dell_wireless_input_destroy(void)
+{
+ input_unregister_device(dellwl_input_dev);
+}
+
+static void dellwl_notify(struct acpi_device *acpi_dev, u32 event)
+{
+ if (event != 0x80) {
+ pr_info("Received unknown event (0x%x)\n", event);
+ return;
+ }
+
+ if (switch_type != DELL_TOGGLE_SWITCH)
+ return;
+
+ input_report_key(dellwl_input_dev, KEY_RFKILL, 1);
+ input_sync(dellwl_input_dev);
+ input_report_key(dellwl_input_dev, KEY_RFKILL, 0);
+ input_sync(dellwl_input_dev);
+}
+
+static int dellwl_add(struct acpi_device *device)
+{
+ acpi_status status;
+ unsigned long long output;
+ int err = 0;
+
+ status = acpi_evaluate_integer(device->handle, "CRBT", NULL, &output);
+ if (!ACPI_SUCCESS(status))
+ return -EINVAL;
+
+ switch (output) {
+ case 0:
+ case 1:
+ switch_type = DELL_TOGGLE_SWITCH;
+ err = dell_wireless_input_setup();
+ break;
+ case 2:
+ case 3:
+ /* hard block is handled by module drivers */
+ switch_type = DELL_SLIDER_SWITCH;
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+static int dellwl_remove(struct acpi_device *device)
+{
+ if (switch_type == DELL_TOGGLE_SWITCH)
+ dell_wireless_input_destroy();
+
+ return 0;
+}
+
+static struct acpi_driver dellwl_driver = {
+ .name = "dell-wireless",
+ .owner = THIS_MODULE,
+ .ids = dellwl_ids,
+ .ops = {
+ .add = dellwl_add,
+ .remove = dellwl_remove,
+ .notify = dellwl_notify,
+ },
+};
+
+static int __init dellwl_init(void)
+{
+ int err;
+
+ pr_info("Initializing DELLABCE module\n");
+ err = acpi_bus_register_driver(&dellwl_driver);
+ if (err) {
+ pr_err("Unable to register DELL wireless control driver.\n");
+ goto error_acpi_register;
+ }
+
+ return 0;
+
+error_acpi_register:
+ return err;
+}
+
+static void __exit dellwl_exit(void)
+{
+ pr_info("Exiting DELLABCE module\n");
+ acpi_bus_unregister_driver(&dellwl_driver);
+}
+
+module_init(dellwl_init);
+module_exit(dellwl_exit);
--
1.7.9.5
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