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/*
* usb/endpt1.c -- USB endpoit 1 (HID) handling
*
* Copyright (C) 2016-2017 Tomasz Kramkowski <tk@the-tk.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 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 <http://www.gnu.org/licenses/>.
*/
#include <reg/usbotg.h>
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include <reg/gpio.h>
#include "../uart.h"
#include "bdt.h"
#include "endpt1.h"
#include "keycodes.h"
#include "txhandler.h"
#define MAX_PACKET 64
static struct tx_ctx tx;
#define THIS_EP 1
static volatile struct usb0_bd (* const this_bdt)[2] = usb_bdt[THIS_EP];
unsigned char report[29];
volatile bool sendrep;
void usb_endpt1_setkey(enum keycode keycode, bool state)
{
unsigned char byte, bit;
if (keycode == KEY_NONE)
return;
keycode -= 4;
byte = keycode / 8;
bit = keycode % 8;
if (state)
SET_BIT(report[byte], bit);
else
UNSET_BIT(report[byte], bit);
sendrep = true;
}
void usb_endpt1_send(void)
{
if (!sendrep)
return;
if (!tx_isempty(&tx)) {
return;
}
tx_que(&tx, report, sizeof report);
sendrep = false;
}
void usb_endpt1_enable(void)
{
this_bdt[BDT_TX][BDT_EVEN].addr = NULL;
this_bdt[BDT_TX][BDT_EVEN].desc = 0;
this_bdt[BDT_TX][BDT_ODD].addr = NULL;
this_bdt[BDT_TX][BDT_ODD].desc = 0;
USB0_ENDPT(THIS_EP) = BV(ENDPT_EPTXEN) | BV(ENDPT_EPHSHK);
tx = TX_CTX(this_bdt[BDT_TX], MAX_PACKET);
tx_que(&tx, report, sizeof report);
}
void usb_endpt1_disable(void)
{
USB0_ENDPT(THIS_EP) = 0;
}
void usb_endpt1_token(uint8_t state)
{
volatile struct usb0_bd *bd;
bd = &usb_bdt[1][GET_BIT(state, STAT_TX)][GET_BIT(state, STAT_ODD)];
switch (GET_BITS(bd->desc, BD_TOK_PID)) {
case BD_TOK_PID_IN:
tx_push(&tx);
break;
}
}
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