hekate/bootloader/utils/btn.c

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/*
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* Copyright (c) 2018 naehrwert
* Copyright (C) 2018 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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/>.
*/
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#include "btn.h"
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#include "../soc/i2c.h"
#include "../soc/gpio.h"
#include "../soc/t210.h"
#include "util.h"
u32 btn_read()
{
u32 res = 0;
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if (!gpio_read(GPIO_PORT_X, GPIO_PIN_7))
res |= BTN_VOL_DOWN;
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if (!gpio_read(GPIO_PORT_X, GPIO_PIN_6))
res |= BTN_VOL_UP;
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if (i2c_recv_byte(4, 0x3C, 0x15) & 0x4)
res |= BTN_POWER;
return res;
}
u32 btn_wait()
{
u32 res = 0, btn = btn_read();
int pwr = 0;
//Power button down, raise a filter.
if (btn & BTN_POWER)
{
pwr = 1;
btn &= ~BTN_POWER;
}
do
{
res = btn_read();
//Power button up, remove filter.
if (!(res & BTN_POWER) && pwr)
pwr = 0;
else if (pwr) //Power button still down.
res &= ~BTN_POWER;
} while (btn == res);
return res;
}
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u32 btn_wait_timeout(u32 time_ms, u32 mask)
{
u32 timeout = get_tmr_ms() + time_ms;
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u32 res = btn_read() & mask;
do
{
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if (!(res & mask))
res = btn_read() & mask;
} while (get_tmr_ms() < timeout);
return res;
}