Input: add Atlas button driver (31ea7ff0) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/input/misc/Kconfig

+10 −0

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		@@ -50,6 +50,16 @@ config INPUT_WISTRON_BTNS
		To compile this driver as a module, choose M here: the module will
		be called wistron_btns.

		config INPUT_ATLAS_BTNS
		tristate "x86 Atlas button interface"
		depends on X86 && ACPI
		help
		Say Y here for support of Atlas wallmount touchscreen buttons.
		The events will show up as scancodes F1 through F9 via evdev.

		To compile this driver as a module, choose M here: the module will
		be called atlas_btns.

		config INPUT_IXP4XX_BEEPER
		tristate "IXP4XX Beeper support"
		depends on ARCH_IXP4XX

drivers/input/misc/Makefile

+1 −0

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		@@ -9,5 +9,6 @@ obj-$(CONFIG_INPUT_PCSPKR) += pcspkr.o
		obj-$(CONFIG_INPUT_M68K_BEEP) += m68kspkr.o
		obj-$(CONFIG_INPUT_UINPUT) += uinput.o
		obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o
		obj-$(CONFIG_INPUT_ATLAS_BTNS) += atlas_btns.o
		obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
		obj-$(CONFIG_INPUT_IXP4XX_BEEPER) += ixp4xx-beeper.o

drivers/input/misc/atlas_btns.c

0 → 100644

+170 −0

Original line number	Diff line number	Diff line
		/*
		* atlas_btns.c - Atlas Wallmount Touchscreen ACPI Extras
		*
		* Copyright (C) 2006 Jaya Kumar
		* Based on Toshiba ACPI by John Belmonte and ASUS ACPI
		* This work was sponsored by CIS(M) Sdn Bhd.
		*
		* 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.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, write to the Free Software
		* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
		*
		*/

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/init.h>
		#include <linux/input.h>
		#include <linux/types.h>
		#include <asm/uaccess.h>
		#include <acpi/acpi_drivers.h>

		#define ACPI_ATLAS_NAME "Atlas ACPI"
		#define ACPI_ATLAS_CLASS "Atlas"
		#define ACPI_ATLAS_BUTTON_HID "ASIM0000"

		static struct input_dev *input_dev;

		/* button handling code */
		static acpi_status acpi_atlas_button_setup(acpi_handle region_handle,
		u32 function, void handler_context, void *return_context)
		{
		*return_context =
		(function != ACPI_REGION_DEACTIVATE) ? handler_context : NULL;

		return AE_OK;
		}

		static acpi_status acpi_atlas_button_handler(u32 function,
		acpi_physical_address address,
		u32 bit_width, acpi_integer *value,
		void handler_context, void region_context)
		{
		acpi_status status;
		int keycode;

		if (function == ACPI_WRITE) {
		keycode = KEY_F1 + (address & 0x0F);
		input_report_key(input_dev, keycode, !(address & 0x10));
		input_sync(input_dev);
		status = 0;
		} else {
		printk(KERN_WARNING "atlas: shrugged on unexpected function"
		":function=%x,address=%lx,value=%x\n",
		function, (unsigned long)address, (u32)*value);
		status = -EINVAL;
		}

		return status;
		}

		static int atlas_acpi_button_add(struct acpi_device *device)
		{
		acpi_status status;
		int err;

		input_dev = input_allocate_device();
		if (!input_dev) {
		printk(KERN_ERR "atlas: unable to allocate input device\n");
		return -ENOMEM;
		}

		input_dev->name = "Atlas ACPI button driver";
		input_dev->phys = "ASIM0000/atlas/input0";
		input_dev->id.bustype = BUS_HOST;
		input_dev->evbit[LONG(EV_KEY)] = BIT(EV_KEY);

		set_bit(KEY_F1, input_dev->keybit);
		set_bit(KEY_F2, input_dev->keybit);
		set_bit(KEY_F3, input_dev->keybit);
		set_bit(KEY_F4, input_dev->keybit);
		set_bit(KEY_F5, input_dev->keybit);
		set_bit(KEY_F6, input_dev->keybit);
		set_bit(KEY_F7, input_dev->keybit);
		set_bit(KEY_F8, input_dev->keybit);
		set_bit(KEY_F9, input_dev->keybit);

		err = input_register_device(input_dev);
		if (err) {
		printk(KERN_ERR "atlas: couldn't register input device\n");
		input_free_device(input_dev);
		return err;
		}

		/* hookup button handler */
		status = acpi_install_address_space_handler(device->handle,
		0x81, &acpi_atlas_button_handler,
		&acpi_atlas_button_setup, device);
		if (ACPI_FAILURE(status)) {
		printk(KERN_ERR "Atlas: Error installing addr spc handler\n");
		input_unregister_device(input_dev);
		status = -EINVAL;
		}

		return status;
		}

		static int atlas_acpi_button_remove(struct acpi_device *device, int type)
		{
		acpi_status status;

		status = acpi_remove_address_space_handler(device->handle,
		0x81, &acpi_atlas_button_handler);
		if (ACPI_FAILURE(status)) {
		printk(KERN_ERR "Atlas: Error removing addr spc handler\n");
		status = -EINVAL;
		}

		input_unregister_device(input_dev);

		return status;
		}

		static struct acpi_driver atlas_acpi_driver = {
		.name = ACPI_ATLAS_NAME,
		.class = ACPI_ATLAS_CLASS,
		.ids = ACPI_ATLAS_BUTTON_HID,
		.ops = {
		.add = atlas_acpi_button_add,
		.remove = atlas_acpi_button_remove,
		},
		};

		static int __init atlas_acpi_init(void)
		{
		int result;

		if (acpi_disabled)
		return -ENODEV;

		result = acpi_bus_register_driver(&atlas_acpi_driver);
		if (result < 0) {
		printk(KERN_ERR "Atlas ACPI: Unable to register driver\n");
		return -ENODEV;
		}

		return 0;
		}

		static void __exit atlas_acpi_exit(void)
		{
		acpi_bus_unregister_driver(&atlas_acpi_driver);
		}

		module_init(atlas_acpi_init);
		module_exit(atlas_acpi_exit);

		MODULE_AUTHOR("Jaya Kumar");
		MODULE_LICENSE("GPL");
		MODULE_DESCRIPTION("Atlas button driver");