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/*
* (C) Copyright 2015 Rockchip Electronics Co., Ltd
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm/io.h>
#include <asm/arch/uart.h>
#include <common.h>
static struct rk_uart *uart_ptr;
static void uart_wrtie_byte(char byte)
{
writel(byte, &uart_ptr->rbr);
while (!(readl(&uart_ptr->lsr) & 0x40))
;
}
void print(char *s)
{
while (*s) {
if (*s == '\n')
uart_wrtie_byte('\r');
uart_wrtie_byte(*s);
s++;
}
}
void print_hex(unsigned int n)
{
int i;
int temp;
uart_wrtie_byte('0');
uart_wrtie_byte('x');
for (i = 8; i > 0; i--) {
temp = (n >> (i - 1) * 4) & 0x0f;
if (temp < 10)
uart_wrtie_byte((char)(temp + '0'));
else
uart_wrtie_byte((char)(temp - 10 + 'a'));
}
uart_wrtie_byte('\n');
uart_wrtie_byte('\r');
}
/*
* TODO: since rk3036 only 4K sram to use in SPL, for saving space,
* we implement uart driver this way, we should convert this to use
* ns16550 driver in future, which support DEBUG_UART in the standard way
*/
void rk_uart_init(void *base)
{
uart_ptr = (struct rk_uart *)base;
writel(0x83, &uart_ptr->lcr);
writel(0x0d, &uart_ptr->rbr);
writel(0x03, &uart_ptr->lcr);
/* fifo enable, sfe is shadow register of FCR[0] */
writel(0x01, &uart_ptr->sfe);
}
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