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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* atlas_btns.c - Atlas Wallmount Touchscreen ACPI Extras
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*
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* Copyright (C) 2006 Jaya Kumar
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* Based on Toshiba ACPI by John Belmonte and ASUS ACPI
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* This work was sponsored by CIS(M) Sdn Bhd.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/input.h>
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#include <linux/types.h>
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#include <linux/acpi.h>
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#include <linux/uaccess.h>
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#define ACPI_ATLAS_NAME "Atlas ACPI"
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#define ACPI_ATLAS_CLASS "Atlas"
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static unsigned short atlas_keymap[16];
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static struct input_dev *input_dev;
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/* button handling code */
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static acpi_status acpi_atlas_button_setup(acpi_handle region_handle,
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u32 function, void *handler_context, void **return_context)
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{
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*return_context =
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(function != ACPI_REGION_DEACTIVATE) ? handler_context : NULL;
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return AE_OK;
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}
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static acpi_status acpi_atlas_button_handler(u32 function,
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acpi_physical_address address,
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u32 bit_width, u64 *value,
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void *handler_context, void *region_context)
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{
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acpi_status status;
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if (function == ACPI_WRITE) {
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int code = address & 0x0f;
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int key_down = !(address & 0x10);
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input_event(input_dev, EV_MSC, MSC_SCAN, code);
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input_report_key(input_dev, atlas_keymap[code], key_down);
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input_sync(input_dev);
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status = AE_OK;
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} else {
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pr_warn("shrugged on unexpected function: function=%x,address=%lx,value=%x\n",
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function, (unsigned long)address, (u32)*value);
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status = AE_BAD_PARAMETER;
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}
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return status;
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}
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static int atlas_acpi_button_add(struct acpi_device *device)
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{
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acpi_status status;
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int i;
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int err;
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input_dev = input_allocate_device();
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if (!input_dev) {
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pr_err("unable to allocate input device\n");
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return -ENOMEM;
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}
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input_dev->name = "Atlas ACPI button driver";
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input_dev->phys = "ASIM0000/atlas/input0";
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input_dev->id.bustype = BUS_HOST;
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input_dev->keycode = atlas_keymap;
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input_dev->keycodesize = sizeof(unsigned short);
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input_dev->keycodemax = ARRAY_SIZE(atlas_keymap);
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input_set_capability(input_dev, EV_MSC, MSC_SCAN);
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__set_bit(EV_KEY, input_dev->evbit);
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for (i = 0; i < ARRAY_SIZE(atlas_keymap); i++) {
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if (i < 9) {
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atlas_keymap[i] = KEY_F1 + i;
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__set_bit(KEY_F1 + i, input_dev->keybit);
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} else
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atlas_keymap[i] = KEY_RESERVED;
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}
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err = input_register_device(input_dev);
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if (err) {
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pr_err("couldn't register input device\n");
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input_free_device(input_dev);
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return err;
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}
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/* hookup button handler */
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status = acpi_install_address_space_handler(device->handle,
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0x81, &acpi_atlas_button_handler,
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&acpi_atlas_button_setup, device);
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if (ACPI_FAILURE(status)) {
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pr_err("error installing addr spc handler\n");
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input_unregister_device(input_dev);
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err = -EINVAL;
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}
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return err;
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}
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static int atlas_acpi_button_remove(struct acpi_device *device)
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{
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acpi_status status;
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status = acpi_remove_address_space_handler(device->handle,
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0x81, &acpi_atlas_button_handler);
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if (ACPI_FAILURE(status))
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pr_err("error removing addr spc handler\n");
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input_unregister_device(input_dev);
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return 0;
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}
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static const struct acpi_device_id atlas_device_ids[] = {
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{"ASIM0000", 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, atlas_device_ids);
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static struct acpi_driver atlas_acpi_driver = {
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.name = ACPI_ATLAS_NAME,
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.class = ACPI_ATLAS_CLASS,
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.owner = THIS_MODULE,
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.ids = atlas_device_ids,
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.ops = {
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.add = atlas_acpi_button_add,
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.remove = atlas_acpi_button_remove,
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},
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};
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module_acpi_driver(atlas_acpi_driver);
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MODULE_AUTHOR("Jaya Kumar");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Atlas button driver");
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