debug-uart.c
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/*
* Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <debug_uart.h>
#include <linux/io.h>
#include <linux/serial_reg.h>
#include "../soc-info.h"
#include "debug-uart.h"
#define UNIPHIER_UART_TX 0x00
#define UNIPHIER_UART_LCR_MCR 0x10
#define UNIPHIER_UART_LSR 0x14
#define UNIPHIER_UART_LDR 0x24
static void _debug_uart_putc(int c)
{
void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE;
while (!(readl(base + UNIPHIER_UART_LSR) & UART_LSR_THRE))
;
writel(c, base + UNIPHIER_UART_TX);
}
void _debug_uart_init(void)
{
void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE;
unsigned int divisor;
switch (uniphier_get_soc_id()) {
#if defined(CONFIG_ARCH_UNIPHIER_SLD3)
case UNIPHIER_SLD3_ID:
divisor = uniphier_sld3_debug_uart_init();
break;
#endif
#if defined(CONFIG_ARCH_UNIPHIER_LD4)
case UNIPHIER_LD4_ID:
divisor = uniphier_ld4_debug_uart_init();
break;
#endif
#if defined(CONFIG_ARCH_UNIPHIER_PRO4)
case UNIPHIER_PRO4_ID:
divisor = uniphier_pro4_debug_uart_init();
break;
#endif
#if defined(CONFIG_ARCH_UNIPHIER_SLD8)
case UNIPHIER_SLD8_ID:
divisor = uniphier_sld8_debug_uart_init();
break;
#endif
#if defined(CONFIG_ARCH_UNIPHIER_PRO5)
case UNIPHIER_PRO5_ID:
divisor = uniphier_pro5_debug_uart_init();
break;
#endif
#if defined(CONFIG_ARCH_UNIPHIER_PXS2)
case UNIPHIER_PXS2_ID:
divisor = uniphier_pxs2_debug_uart_init();
break;
#endif
#if defined(CONFIG_ARCH_UNIPHIER_LD6B)
case UNIPHIER_LD6B_ID:
divisor = uniphier_ld6b_debug_uart_init();
break;
#endif
#if defined(CONFIG_ARCH_UNIPHIER_LD11) || defined(CONFIG_ARCH_UNIPHIER_LD20)
case UNIPHIER_LD11_ID:
case UNIPHIER_LD20_ID:
divisor = uniphier_ld20_debug_uart_init();
break;
#endif
default:
return;
}
writel(UART_LCR_WLEN8 << 8, base + UNIPHIER_UART_LCR_MCR);
writel(divisor, base + UNIPHIER_UART_LDR);
}
DEBUG_UART_FUNCS