pinmux.c

/*
 * Copyright (c) 2018 naehrwert
 * Copyright (c) 2018-2026 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/>.
 */

#include <soc/i2c.h>
#include <soc/pinmux.h>
#include <soc/t210.h>

void pinmux_config_uart(u32 idx)
{
	PINMUX_AUX(PINMUX_AUX_UARTX_TX(idx))  = 0;
	PINMUX_AUX(PINMUX_AUX_UARTX_RX(idx))  = PINMUX_INPUT_ENABLE | PINMUX_TRISTATE;
	PINMUX_AUX(PINMUX_AUX_UARTX_RTS(idx)) = 0;
	PINMUX_AUX(PINMUX_AUX_UARTX_CTS(idx)) = PINMUX_INPUT_ENABLE | PINMUX_TRISTATE;
}

void pinmux_config_i2c(u32 idx)
{
	PINMUX_AUX(PINMUX_AUX_X_I2C_SCL(idx)) = PINMUX_INPUT_ENABLE;
	PINMUX_AUX(PINMUX_AUX_X_I2C_SDA(idx)) = PINMUX_INPUT_ENABLE;

	// Detach I2C4 pins from I2C3 function.
	if (idx == I2C_3 || idx == I2C_4)
	{
		PINMUX_AUX(PINMUX_AUX_X_I2C_SCL(I2C_4)) |= 1;
		PINMUX_AUX(PINMUX_AUX_X_I2C_SDA(I2C_4)) |= 1;
	}
}

void pinmux_config_i2s(u32 idx)
{
	PINMUX_AUX(PINMUX_AUX_X_I2S_LRCK(idx)) = PINMUX_DRIVE_4X | PINMUX_PULL_DOWN;
	PINMUX_AUX(PINMUX_AUX_X_I2C_DIN(idx))  = PINMUX_DRIVE_4X | PINMUX_INPUT_ENABLE | PINMUX_TRISTATE | PINMUX_PULL_DOWN;
	PINMUX_AUX(PINMUX_AUX_X_I2C_DOUT(idx)) = PINMUX_DRIVE_4X | PINMUX_PULL_DOWN;
	PINMUX_AUX(PINMUX_AUX_X_I2C_BCLK(idx)) = PINMUX_DRIVE_4X | PINMUX_PULL_DOWN;
}