u-boot/arch/arm/mach-uniphier/board_late_init.c
Masahiro Yamada 6bc50a8f69 ARM: uniphier: do not modify bootcmd environment variable at run-time
Some users might want to modify 'bootcmd' at compile-time by editing
include/configs/uniphier.h, but overwriting it at run-time makes it
impossible.

Instead, set 'bootdev' at run-time, which contains the boot device the
system is booting from, then indirectly reference it from 'bootcmd'.

It is up to users whether to override 'bootcmd'.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-12-29 11:38:33 +09:00

99 lines
2.2 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2014 Panasonic Corporation
* Copyright (C) 2015-2016 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*/
#include <common.h>
#include <spl.h>
#include <linux/libfdt.h>
#include <nand.h>
#include <stdio.h>
#include <linux/io.h>
#include <linux/printk.h>
#include <../drivers/mtd/nand/raw/denali.h>
#include "init.h"
static void nand_denali_wp_disable(void)
{
#ifdef CONFIG_NAND_DENALI
/*
* Since the boot rom enables the write protection for NAND boot mode,
* it must be disabled somewhere for "nand write", "nand erase", etc.
* The workaround is here to not disturb the Denali NAND controller
* driver just for a really SoC-specific thing.
*/
void __iomem *denali_reg = (void __iomem *)CONFIG_SYS_NAND_REGS_BASE;
writel(WRITE_PROTECT__FLAG, denali_reg + WRITE_PROTECT);
#endif
}
static int uniphier_set_fdt_file(void)
{
DECLARE_GLOBAL_DATA_PTR;
const char *compat;
char dtb_name[256];
int buf_len = sizeof(dtb_name);
if (env_get("fdtfile"))
return 0; /* do nothing if it is already set */
compat = fdt_stringlist_get(gd->fdt_blob, 0, "compatible", 0, NULL);
if (!compat)
return -EINVAL;
/* rip off the vendor prefix "socionext," */
compat = strchr(compat, ',');
if (!compat)
return -EINVAL;
compat++;
strncpy(dtb_name, compat, buf_len);
buf_len -= strlen(compat);
strncat(dtb_name, ".dtb", buf_len);
return env_set("fdtfile", dtb_name);
}
int board_late_init(void)
{
puts("MODE: ");
switch (uniphier_boot_device_raw()) {
case BOOT_DEVICE_MMC1:
printf("eMMC Boot");
env_set("bootdev", "emmc");
break;
case BOOT_DEVICE_NAND:
printf("NAND Boot");
env_set("bootdev", "nand");
nand_denali_wp_disable();
break;
case BOOT_DEVICE_NOR:
printf("NOR Boot");
env_set("bootdev", "nor");
break;
case BOOT_DEVICE_USB:
printf("USB Boot");
env_set("bootdev", "usb");
break;
default:
printf("Unknown");
break;
}
if (uniphier_have_internal_stm())
printf(" (STM: %s)",
uniphier_boot_from_backend() ? "OFF" : "ON");
printf("\n");
if (uniphier_set_fdt_file())
pr_warn("fdt_file environment was not set correctly\n");
return 0;
}