u-boot-2016.11移植u-boot.bin

关注

VIP免费原创最新推荐文章于 2026-09-07 11:50:21 发布 1.4k 阅读 AI 写同款· GEO 优化 ›

u-boot-2016.11移植uboot-spl.bin 一、时钟初始化 1、修改clock.h cd arch/arm/mach-s5pv210/include/mach/vim clock.h /* add by Sourcelink */ struct s5pv210_clock { unsigned int apll_lock; unsigned char res1[0x04]; un 阅读详情

https://github.com/SourceLink/S5PV210

1、修改堆栈指针

vim include/configs/smdkv210.h 
#define CONFIG_SYS_LOAD_ADDR            CONFIG_SYS_SDRAM_BASE + 0x40000000              /* modied by Sourcelink */
#define CONFIG_SYS_INIT_SP_ADDR         CONFIG_SYS_LOAD_ADDR            		/* modied by Sourcelink */
#define CONFIG_SYS_SDRAM_BASE           0x20000000     					/* modied by Sourcelink */

2、添加串口

a）添加串口初始化引脚代码

vim board/samsung/smdkv210/lowlevel_init.S
        
ldr     r0, =0xE0200000
ldr     r1, =0X22222222
str     r1, [r0]

b）添加串口初始化配置代码

vim drivers/serial/serial_s5p.c

/*
 * (C) Copyright 2009 SAMSUNG Electronics
 * Minkyu Kang <mk7.kang@samsung.com>
 * Heungjun Kim <riverful.kim@samsung.com>
 *
 * based on drivers/serial/s3c64xx.c
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <fdtdec.h>
#include <linux/compiler.h>
#include <asm/io.h>
#include <asm/arch/uart.h>
#include <asm/arch/clk.h>
#include <serial.h>

DECLARE_GLOBAL_DATA_PTR;

#define RX_FIFO_COUNT_MASK	0xff
#define RX_FIFO_FULL_MASK	(1 << 8)
#define TX_FIFO_FULL_MASK	(1 << 24)

/* Information about a serial port */
struct fdt_serial {
	u32 base_addr;  /* address of registers in physical memory */
	u8 port_id;     /* uart port number */
	u8 enabled;     /* 1 if enabled, 0 if disabled */
} config __attribute__ ((section(".data")));

static inline struct s5p_uart *s5p_get_base_uart(int dev_index)
{
#ifdef CONFIG_OF_CONTROL
	return (struct s5p_uart *)(config.base_addr);
#else
	u32 offset = dev_index * sizeof(struct s5p_uart);
	return (struct s5p_uart *)(samsung_get_base_uart() + offset);
#endif
}

/*
 * The coefficient, used to calculate the baudrate on S5P UARTs is
 * calculated as
 * C = UBRDIV * 16 + number_of_set_bits_in_UDIVSLOT
 * however, section 31.6.11 of the datasheet doesn't recomment using 1 for 1,
 * 3 for 2, ... (2^n - 1) for n, instead, they suggest using these constants:
 */
static const int udivslot[] = {
	0,
	0x0080,
	0x0808,
	0x0888,
	0x2222,
	0x4924,
	0x4a52,
	0x54aa,
	0x5555,
	0xd555,
	0xd5d5,
	0xddd5,
	0xdddd,
	0xdfdd,
	0xdfdf,
	0xffdf,
};

static void serial_setbrg_dev(const int dev_index)
{
	struct s5p_uart *const uart = s5p_get_base_uart(dev_index);
	u32 uclk = get_uart_clk(dev_index);
	u32 baudrate = gd->baudrate;
	u32 val;

#if defined(CONFIG_SILENT_CONSOLE) && \
		defined(CONFIG_OF_CONTROL) && \
		!defined(CONFIG_SPL_BUILD)
	if (fdtdec_get_config_int(gd->fdt_blob, "silent_console", 0))
		gd->flags |= GD_FLG_SILENT;
#endif

	if (!config.enabled)
		return;

	val = uclk / baudrate;

	writel(val / 16 - 1, &uart->ubrdiv);

	if (s5p_uart_divslot())
		writew(udivslot[val % 16], &uart->rest.slot);
	else
		writeb(val % 16, &uart->rest.value);
}

/*
 * Initialise the serial port with the given baudrate. The settings
 * are always 8 data bits, no parity, 1 stop bit, no start bits.
 */
static int serial_init_dev(const int dev_index)
{
	struct s5p_uart *const uart = s5p_get_base_uart(dev_index);

	/* enable FIFOs, auto clear Rx FIFO */
	writel(0x3, &uart->ufcon);
	writel(0, &uart->umco