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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2013 by Lorenzo Miori
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "uartdbg-imx233.h"
#include "pinctrl-imx233.h"
#include "clkctrl-imx233.h"
#include "regs/uartdbg.h"
void imx233_uartdbg_init(unsigned long baud)
{
/* Enable UART clock */
imx233_clkctrl_enable(CLK_UART, true);
/* Configure UART pins */
imx233_pinctrl_setup_vpin(VPIN_UARTDBG_TX, "uartdbg tx", PINCTRL_DRIVE_4mA, false);
imx233_pinctrl_setup_vpin(VPIN_UARTDBG_RX, "uartdbg rx", PINCTRL_DRIVE_4mA, false);
/* Set baud rate */
HW_UARTDBG_IBRD = baud >> 16;
HW_UARTDBG_FBRD = baud & 0xFFFF;
/* Set port options (actually needed to set baud rate), 8 bit char, enable FIFO buffer */
BF_WR(UARTDBG_LCR_H, WLEN(3));
BF_WR(UARTDBG_LCR_H, FEN(1));
/* Finally enable UART device, TX enable, RX enable, device enable */
BF_WR(UARTDBG_CR, TXE(1));
BF_WR(UARTDBG_CR, RXE(1));
BF_WR(UARTDBG_CR, UARTEN(1));
}
void imx233_uartdbg_send(unsigned char data)
{
/* Wait to transmit if TX FIFO buffer is full*/
while (BF_RD(UARTDBG_FR, TXFF));
BF_WR(UARTDBG_DR, DATA(data));
}
void uart_tx(const char* data)
{
while (*data != 0)
imx233_uartdbg_send(*data++);
}
unsigned int uart_rx(char* rx_buf, unsigned int len)
{
unsigned int i = 0;
while(i < len)
{
/* Check if the UART Rx Buffer has something into -> RXFE */
if(!BF_RD(UARTDBG_FR, RXFE))
{
rx_buf[i] = HW_UARTDBG_DR;
i++;
}
}
return i;
}
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