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fbink_input_scan.h
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/*
FBInk: FrameBuffer eInker, a library to print text & images to an eInk Linux framebuffer
Copyright (C) 2024 NiLuJe <ninuje@gmail.com>
SPDX-License-Identifier: GPL-3.0-or-later
----
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 3 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, see <https://www.gnu.org/licenses/>.
*/
#ifndef __FBINK_INPUT_SCAN_H
#define __FBINK_INPUT_SCAN_H
// Mainly to make IDEs happy
#include "fbink.h"
#include "fbink_internal.h"
#include <dirent.h>
#include <fcntl.h>
#include <limits.h>
#include <linux/input.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#ifdef FBINK_WITH_INPUT
# ifdef __GLIBC__
// versionsort sorts the device names in proper numerical order
// (e.g. so that event10 is listed after event9, not event1),
// but is only available in glibc.
static int (*sort_fn)(const struct dirent**, const struct dirent**) = versionsort;
# else
// Fall back to basic alphabetical sorting for other libc implementations.
static int (*sort_fn)(const struct dirent**, const struct dirent**) = alphasort;
# endif
# define DEV_INPUT_EVENT "/dev/input"
# define EVENT_DEV_NAME "event"
static int
is_event_device(const struct dirent* dir)
{
return strncmp(EVENT_DEV_NAME, dir->d_name, 5) == 0;
}
// This needs to be kernel-compatible
# define BITS_PER_LONG (sizeof(unsigned long) * 8)
# define NBITS(x) ((((x) - 1) / BITS_PER_LONG) + 1)
# define OFF(x) ((x) % BITS_PER_LONG)
# define BIT(x) (1UL << OFF(x))
# define LONG(x) ((x) / BITS_PER_LONG)
# define test_bit(bit, array) ((array[LONG(bit)] >> OFF(bit)) & 1)
static bool test_pointers(FBInkInputDevice* dev,
const unsigned long* bitmask_ev,
const unsigned long* bitmask_abs,
const unsigned long* bitmask_key,
const unsigned long* bitmask_rel,
const unsigned long* bitmask_props);
static bool test_key(FBInkInputDevice* dev, const unsigned long* bitmask_ev, const unsigned long* bitmask_key);
static void test_platform_keys(FBInkInputDevice* dev, const unsigned long* bitmask_key);
static int check_device_cap(FBInkInputDevice* dev);
static __attribute__((cold)) const char* input_type_to_string(INPUT_DEVICE_TYPE_E type);
static __attribute__((cold)) void concat_type_recap(INPUT_DEVICE_TYPE_T type, char* string, size_t dsize);
// Old kernels need a hand...
# ifndef EVIOCGPROP
# define EVIOCGPROP(len) _IOC(_IOC_READ, 'E', 0x09, len)
# endif
# ifndef INPUT_PROP_DIRECT
# define INPUT_PROP_DIRECT 0x01
# endif
# ifndef INPUT_PROP_POINTING_STICK
# define INPUT_PROP_POINTING_STICK 0x05
# endif
# ifndef INPUT_PROP_ACCELEROMETER
# define INPUT_PROP_ACCELEROMETER 0x06
# endif
# ifndef INPUT_PROP_MAX
# define INPUT_PROP_MAX 0x1f
# endif
# ifndef ABS_MT_SLOT
# define ABS_MT_SLOT 0x2f
# endif
# ifndef BTN_TRIGGER_HAPPY
# define BTN_TRIGGER_HAPPY 0x2c0
# endif
// Each of our target platforms tend to settle on some specific,
// sometimes barely related, keycodes for common functions...
# if defined(FBINK_FOR_KOBO)
# define PLATFORM_KEY_POWER KEY_POWER
# define PLATFORM_KEY_SLEEP KEY_H // PowerCover, since the Elipsa
# define PLATFORM_KEY_WAKEUP KEY_F1 // PowerCover, before the Elipsa
# define PLATFORM_KEY_PGPREV KEY_F23
# define PLATFORM_KEY_PGNEXT KEY_F24
# define PLATFORM_KEY_HOME KEY_HOME
# define PLATFORM_KEY_FRONTLIGHT KEY_KATAKANA
# define PLATFORM_KEY_MENU 0
# define PLATFORM_KEY_DPAD KEY_UP
# elif defined(FBINK_FOR_KINDLE)
# define PLATFORM_KEY_POWER KEY_POWER // Generally handled by powerd
# define PLATFORM_KEY_SLEEP 0 // :?
# define PLATFORM_KEY_WAKEUP 0 // :?
# define PLATFORM_KEY_PGPREV KEY_PAGEUP
# define PLATFORM_KEY_PGNEXT KEY_PAGEDOWN
# define PLATFORM_KEY_HOME KEY_HOME
# define PLATFORM_KEY_FRONTLIGHT 0
# define PLATFORM_KEY_MENU KEY_MENU
# define PLATFORM_KEY_DPAD BTN_DPAD_UP
# else
# define PLATFORM_KEY_POWER KEY_POWER
# define PLATFORM_KEY_SLEEP KEY_SLEEP
# define PLATFORM_KEY_WAKEUP KEY_WAKEUP
# define PLATFORM_KEY_PGPREV KEY_BACK
# define PLATFORM_KEY_PGNEXT KEY_FORWARD
# define PLATFORM_KEY_HOME KEY_HOMEPAGE
# define PLATFORM_KEY_FRONTLIGHT KEY_BRIGHTNESS_CYCLE
# define PLATFORM_KEY_MENU KEY_MENU
# define PLATFORM_KEY_DPAD KEY_UP
# endif
#endif // FBINK_WITH_INPUT
#endif