mirror of
https://github.com/Rockbox/rockbox.git
synced 2025-10-14 02:27:39 -04:00
3a0d490713
Some screens (eg Surfans F28) only report absolute positioning
via "EV_ABS" events, and the actual "touch on, touch off" happens
via a separate "EV_KEY" event. So handle this.
This also fixes a nasty bug introduced in 3270daf2c4.
Change-Id: If73d390679ba6ffe37541442f631c03b73774fbb
308 lines
8.7 KiB
C
308 lines
8.7 KiB
C
/***************************************************************************
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* __________ __ ___
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2017 Marcin Bukat
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* Copyright (C) 2020 Solomon Peachy
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <poll.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <linux/input.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdlib.h>
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#include "kernel.h"
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#include "sysfs.h"
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#include "button.h"
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#include "panic.h"
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#ifdef HAVE_SCROLLWHEEL
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#include "powermgmt.h"
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#if defined(HAVE_BACKLIGHT) || defined(HAVE_BUTTON_LIGHT)
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#include "backlight.h"
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#endif
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#endif /* HAVE_SCROLLWHEEL */
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/* TODO: HAVE_SCROLLWHEEL is a hack. Instead of posting the exact number
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of clicks, instead do it similar to the ipod clickwheel and post
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the wheel angular velocity (degrees per second)
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* Track the relative position (ie based on click events)
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* Use WHEELCLICKS_PER_ROTATION to convert clicks to angular distance
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* Compute to angular velocity (degrees per second)
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*/
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#define NR_POLL_DESC 4
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static int num_devices = 0;
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static struct pollfd poll_fds[NR_POLL_DESC];
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void button_init_device(void)
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{
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const char * const input_devs[NR_POLL_DESC] = {
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"/dev/input/event0",
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"/dev/input/event1",
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"/dev/input/event2",
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"/dev/input/event3",
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};
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for(int i = 0; i < NR_POLL_DESC; i++)
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{
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int fd = open(input_devs[i], O_RDONLY | O_CLOEXEC);
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if(fd >= 0)
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{
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poll_fds[num_devices].fd = fd;
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poll_fds[num_devices].events = POLLIN;
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poll_fds[num_devices].revents = 0;
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num_devices++;
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}
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}
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}
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void button_close_device(void)
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{
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/* close descriptors */
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for(int i = 0; i < num_devices; i++)
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{
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close(poll_fds[i].fd);
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}
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num_devices = 0;
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}
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#ifdef BUTTON_DELAY_RELEASE
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static int button_delay_release = 0;
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static int delay_tick = 0;
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#endif
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#ifdef HAVE_TOUCHSCREEN
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/* Last known touchscreen coordinates. */
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static int _last_x = 0;
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static int _last_y = 0;
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/* Last known touchscreen state. */
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static enum
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{
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TOUCHSCREEN_STATE_UNKNOWN = 0,
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TOUCHSCREEN_STATE_UP,
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TOUCHSCREEN_STATE_DOWN
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} _last_touch_state = TOUCHSCREEN_STATE_UNKNOWN;
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// XXX ... figure out what is standard.
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#define EVENT_VALUE_TOUCHSCREEN_PRESS 1
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#define EVENT_VALUE_TOUCHSCREEN_RELEASE -1
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static int ts_enabled = 0;
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void touchscreen_enable_device(bool en)
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{
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ts_enabled = en;
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}
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static bool handle_touchscreen_event(__u16 code, __s32 value)
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{
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bool read_more = false;
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switch(code)
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{
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case ABS_X:
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case ABS_MT_POSITION_X:
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{
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_last_x = value;
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/* x -> next will be y. */
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read_more = true;
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break;
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}
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case ABS_Y:
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case ABS_MT_POSITION_Y:
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{
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_last_y = value;
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break;
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}
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case ABS_MT_TRACKING_ID:
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{
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if(value == EVENT_VALUE_TOUCHSCREEN_PRESS)
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{
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_last_touch_state = TOUCHSCREEN_STATE_DOWN;
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/* Press -> next will be x. */
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read_more = true;
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}
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else
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{
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_last_touch_state = TOUCHSCREEN_STATE_UP;
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}
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break;
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}
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}
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return read_more;
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}
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#endif
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#ifdef HAVE_BUTTON_DATA
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#define BDATA int *data
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#else
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#define BDATA void
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#endif
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int button_read_device(BDATA)
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{
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static int button_bitmap = 0;
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struct input_event event;
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#if defined(HAVE_BUTTON_DATA) && !defined(HAVE_TOUCHSCREEN)
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(void)data;
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#endif
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#ifdef HAVE_SCROLLWHEEL
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int wheel_ticks = 0;
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#endif
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#ifdef BUTTON_DELAY_RELEASE
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/* First de-assert delayed-release buttons */
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if (button_delay_release && current_tick >= delay_tick)
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{
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button_bitmap &= ~button_delay_release;
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button_delay_release = 0;
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}
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#endif
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/* check if there are any events pending and process them */
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while(poll(poll_fds, num_devices, 0)) {
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for(int i = 0; i < num_devices; i++) {
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/* read only if non-blocking */
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if(poll_fds[i].revents & POLLIN) {
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int size = read(poll_fds[i].fd, &event, sizeof(event));
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if(size == (int)sizeof(event)) {
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switch(event.type) {
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case EV_KEY: {
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/* map linux event code to rockbox button bitmap */
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int bmap = button_map(event.code);
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/* event.value == 0x10000 means press
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* event.value == 0 means release
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*/
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if(event.value) {
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#ifdef HAVE_SCROLLWHEEL
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/* Filter out wheel ticks */
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if (bmap & BUTTON_SCROLL_BACK)
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wheel_ticks--;
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else if (bmap & BUTTON_SCROLL_FWD)
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wheel_ticks++;
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bmap &= ~(BUTTON_SCROLL_BACK|BUTTON_SCROLL_FWD);
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#endif
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#ifdef BUTTON_DELAY_RELEASE
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bmap &= ~BUTTON_DELAY_RELEASE;
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#endif
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#if defined(HAVE_TOUCHSCREEN) && defined(BUTTON_TOUCH)
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/* Some touchscreens give us actual touch/untouch as a "key" */
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if (bmap & BUTTON_TOUCH) {
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handle_touchscreen_event(ABS_MT_TRACKING_ID, EVENT_VALUE_TOUCHSCREEN_PRESS);
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bmap &= ~BUTTON_TOUCH;
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}
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#endif
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button_bitmap |= bmap;
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} else {
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#if defined(HAVE_TOUCHSCREEN) && defined(BUTTON_TOUCH)
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/* Some touchscreens give us actual touch/untouch as a "key" */
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if (bmap & BUTTON_TOUCH) {
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handle_touchscreen_event(ABS_MT_TRACKING_ID, 0);
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bmap &= ~BUTTON_TOUCH;
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}
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#endif
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#ifdef BUTTON_DELAY_RELEASE
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/* Delay the release of any requested buttons */
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if (bmap & BUTTON_DELAY_RELEASE) {
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button_delay_release |= bmap & ~BUTTON_DELAY_RELEASE;
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delay_tick = current_tick + HZ/20;
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bmap = 0;
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}
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#endif
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#ifdef HAVE_SCROLLWHEEL
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/* Wheel gives us press+release back to back; ignore the release */
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bmap &= ~(BUTTON_SCROLL_BACK|BUTTON_SCROLL_FWD);
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#endif
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button_bitmap &= ~bmap;
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}
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break;
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}
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#ifdef HAVE_TOUCHSCREEN
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case EV_ABS: {
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if (ts_enabled) {
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handle_touchscreen_event(event.code, event.value);
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} else {
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/* If disabled... ignore */
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_last_touch_state = TOUCHSCREEN_STATE_UNKNOWN;
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}
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break;
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}
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#endif
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default:
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/* Ignore other event types */
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break;
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}
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}
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}
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}
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}
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#ifdef HAVE_SCROLLWHEEL
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/* Reset backlight and poweroff timers */
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if (wheel_ticks) {
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#ifdef HAVE_BACKLIGHT
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backlight_on();
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#endif
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#ifdef HAVE_BUTTON_LIGHT
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buttonlight_on();
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#endif
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reset_poweroff_timer();
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}
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if (wheel_ticks > 0)
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{
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while (wheel_ticks-- > 0)
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{
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button_queue_post(BUTTON_SCROLL_FWD, 0);
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}
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}
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else if (wheel_ticks < 0)
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{
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while (wheel_ticks++ < 0)
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{
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button_queue_post(BUTTON_SCROLL_BACK, 0);
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}
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}
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#endif /* HAVE_SCROLLWHEEL */
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#ifdef HAVE_TOUCHSCREEN
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int touch = touchscreen_to_pixels(_last_x, _last_y, data);
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if(_last_touch_state == TOUCHSCREEN_STATE_DOWN)
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{
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return button_bitmap | touch;
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}
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#endif
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return button_bitmap;
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}
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