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/*
Copyright 2011 Jun Wako <wakojun@gmail.com>
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, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <avr/interrupt.h>
#include "usb_keycodes.h"
#include "host.h"
#include "util.h"
#include "debug.h"
#ifdef NKRO_ENABLE
bool keyboard_nkro = false;
#endif
static host_driver_t *driver;
static report_keyboard_t report0;
static report_keyboard_t report1;
report_keyboard_t *keyboard_report = &report0;
report_keyboard_t *keyboard_report_prev = &report1;
static inline void add_key_byte(uint8_t code);
static inline void add_key_bit(uint8_t code);
void host_set_driver(host_driver_t *d)
{
driver = d;
}
host_driver_t *host_get_driver(void)
{
return driver;
}
uint8_t host_keyboard_leds(void)
{
if (!driver) return 0;
return (*driver->keyboard_leds)();
}
/* keyboard report operations */
void host_add_key(uint8_t key)
{
#ifdef NKRO_ENABLE
if (keyboard_nkro) {
add_key_bit(key);
return;
}
#endif
add_key_byte(key);
}
void host_add_mod_bit(uint8_t mod)
{
keyboard_report->mods |= mod;
}
void host_set_mods(uint8_t mods)
{
keyboard_report->mods = mods;
}
void host_add_code(uint8_t code)
{
if (IS_MOD(code)) {
host_add_mod_bit(MOD_BIT(code));
} else {
host_add_key(code);
}
}
void host_swap_keyboard_report(void)
{
uint8_t sreg = SREG;
cli();
report_keyboard_t *tmp = keyboard_report_prev;
keyboard_report_prev = keyboard_report;
keyboard_report = tmp;
SREG = sreg;
}
void host_clear_keyboard_report(void)
{
keyboard_report->mods = 0;
for (int8_t i = 0; i < REPORT_KEYS; i++) {
keyboard_report->keys[i] = 0;
}
}
uint8_t host_has_anykey(void)
{
uint8_t cnt = 0;
for (int i = 0; i < REPORT_KEYS; i++) {
if (keyboard_report->keys[i])
cnt++;
}
return cnt;
}
uint8_t host_get_first_key(void)
{
#ifdef NKRO_ENABLE
if (keyboard_nkro) {
uint8_t i = 0;
for (; i < REPORT_KEYS && !keyboard_report->keys[i]; i++)
;
return i<<3 | biton(keyboard_report->keys[i]);
}
#endif
return keyboard_report->keys[0];
}
void host_send_keyboard_report(void)
{
if (!driver) return;
(*driver->send_keyboard)(keyboard_report);
}
void host_mouse_send(report_mouse_t *report)
{
if (!driver) return;
(*driver->send_mouse)(report);
}
void host_system_send(uint16_t data)
{
if (!driver) return;
(*driver->send_consumer)(data);
}
void host_consumer_send(uint16_t data)
{
// TODO: this is needed?
static uint16_t last_data = 0;
if (data == last_data) return;
last_data = data;
if (!driver) return;
(*driver->send_consumer)(data);
}
static inline void add_key_byte(uint8_t code)
{
// TODO: fix ugly code
int8_t i = 0;
int8_t empty = -1;
for (; i < REPORT_KEYS; i++) {
if (keyboard_report_prev->keys[i] == code) {
keyboard_report->keys[i] = code;
break;
}
if (empty == -1 &&
keyboard_report_prev->keys[i] == 0 &&
keyboard_report->keys[i] == 0) {
empty = i;
}
}
if (i == REPORT_KEYS) {
if (empty != -1) {
keyboard_report->keys[empty] = code;
}
}
}
static inline void add_key_bit(uint8_t code)
{
if ((code>>3) < REPORT_KEYS) {
keyboard_report->keys[code>>3] |= 1<<(code&7);
} else {
debug("add_key_bit: can't add: "); phex(code); debug("\n");
}
}
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