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