M7350/bootable/bootloader/lk/dev/keys/keys.c
2024-09-09 08:52:07 +00:00

68 lines
2.3 KiB
C

/*
* Copyright (c) 2008, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google, Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <bits.h>
#include <debug.h>
#include <string.h>
#include <dev/keys.h>
static unsigned long key_bitmap[BITMAP_NUM_WORDS(MAX_KEYS)];
void keys_init(void)
{
memset(key_bitmap, 0, sizeof(key_bitmap));
}
void keys_post_event(uint16_t code, int16_t value)
{
if (code >= MAX_KEYS) {
dprintf(INFO, "Invalid keycode posted: %d\n", code);
return;
}
/* TODO: Implement an actual event queue if it becomes necessary */
if (value)
bitmap_set(key_bitmap, code);
else
bitmap_clear(key_bitmap, code);
// dprintf(INFO, "key state change: %d %d\n", code, value);
}
int keys_get_state(uint16_t code)
{
if (code >= MAX_KEYS) {
dprintf(INFO, "Invalid keycode requested: %d\n", code);
return -1;
}
return bitmap_test(key_bitmap, code);
}