mirror of
https://xff.cz/git/u-boot/
synced 2025-10-31 02:15:45 +01:00
d5cf32977f
For ARM32 architecture, CONFIG_DEBUG_LL is available for early low-level debugging (and actually UniPhier 32bit SoCs use it), but ARM64 architecture does not support it. Instead, CONFIG_DEBUG_UART is available as an architecture-independent debug facility. This commit supports it on all the UniPhier SoCs (including the new ARMv8 SoCs), which is very useful for new SoC bringups. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
/*
|
|
* 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_type()) {
|
|
#if defined(CONFIG_ARCH_UNIPHIER_SLD3)
|
|
case SOC_UNIPHIER_SLD3:
|
|
divisor = uniphier_sld3_debug_uart_init();
|
|
break;
|
|
#endif
|
|
#if defined(CONFIG_ARCH_UNIPHIER_LD4)
|
|
case SOC_UNIPHIER_LD4:
|
|
divisor = uniphier_ld4_debug_uart_init();
|
|
break;
|
|
#endif
|
|
#if defined(CONFIG_ARCH_UNIPHIER_PRO4)
|
|
case SOC_UNIPHIER_PRO4:
|
|
divisor = uniphier_pro4_debug_uart_init();
|
|
break;
|
|
#endif
|
|
#if defined(CONFIG_ARCH_UNIPHIER_SLD8)
|
|
case SOC_UNIPHIER_SLD8:
|
|
divisor = uniphier_sld8_debug_uart_init();
|
|
break;
|
|
#endif
|
|
#if defined(CONFIG_ARCH_UNIPHIER_PRO5)
|
|
case SOC_UNIPHIER_PRO5:
|
|
divisor = uniphier_pro5_debug_uart_init();
|
|
break;
|
|
#endif
|
|
#if defined(CONFIG_ARCH_UNIPHIER_PXS2)
|
|
case SOC_UNIPHIER_PXS2:
|
|
divisor = uniphier_pxs2_debug_uart_init();
|
|
break;
|
|
#endif
|
|
#if defined(CONFIG_ARCH_UNIPHIER_LD6B)
|
|
case SOC_UNIPHIER_LD6B:
|
|
divisor = uniphier_ld6b_debug_uart_init();
|
|
break;
|
|
#endif
|
|
#if defined(CONFIG_ARCH_UNIPHIER_LD11) || defined(CONFIG_ARCH_UNIPHIER_LD20)
|
|
case SOC_UNIPHIER_LD11:
|
|
case SOC_UNIPHIER_LD20:
|
|
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
|