On Tue, Nov 11, 2014 at 02:01:25PM +0800, Alex Hung wrote:
Please provide a proper git commit message.
Which devices present this button. There appears to be a button and a slider
version? Is it necessary to add completely new driver for this one button in
addition to the other dell-* drivers already here.
Matthew?
As this is ACPI enumerated, does it belong in drivers/platform and not in
drivers/acpi?
Rafael?
Thanks,
Darren
> 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
>
>
--
Darren Hart
Intel Open Source Technology Center
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