mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 19:26:16 +09:00
8ea4f49a47
When we want to boot Linux with a DTB file downloaded from a TFTP server or somewhere, we need to know the file name to be downloaded. Assume the U-Boot configuration is shared among some similar boards. If they are similar enough, the difference only appears in device trees. The build procedure would be like this: - Board A: make foo_common_defconfig && make DEVICE_TREE=foo_board_a - Board B: make foo_common_defconfig && make DEVICE_TREE=foo_board_b - Board C: make foo_common_defconfig && make DEVICE_TREE=foo_board_c In this case, the U-Boot image contains nothing about the DTB file name it is running with. (CONFIG_DEFAULT_DEVICE_TREE is not helpful for this purpose because it is painful to change it from "make menuconfig" for each board.) This commit allows to lookup the DTB file name based on the compatible string and set it to "fdt_file" environment. Then "tftpboot $fdt_file" will download the file we want. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/*
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* Copyright (C) 2014-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <spl.h>
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#include <libfdt.h>
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#include <nand.h>
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#include <linux/io.h>
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#include <../drivers/mtd/nand/denali.h>
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static void nand_denali_wp_disable(void)
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{
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#ifdef CONFIG_NAND_DENALI
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/*
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* Since the boot rom enables the write protection for NAND boot mode,
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* it must be disabled somewhere for "nand write", "nand erase", etc.
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* The workaround is here to not disturb the Denali NAND controller
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* driver just for a really SoC-specific thing.
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*/
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void __iomem *denali_reg = (void __iomem *)CONFIG_SYS_NAND_REGS_BASE;
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writel(WRITE_PROTECT__FLAG, denali_reg + WRITE_PROTECT);
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#endif
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}
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struct uniphier_fdt_file {
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const char *compatible;
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const char *file_name;
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};
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static const struct uniphier_fdt_file uniphier_fdt_files[] = {
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{ "socionext,ph1-ld4-ref", "uniphier-ph1-ld4-ref.dtb", },
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{ "socionext,ph1-ld6b-ref", "uniphier-ph1-ld6b-ref.dtb", },
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{ "socionext,ph1-ld10-ref", "uniphier-ph1-ld10-ref.dtb", },
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{ "socionext,ph1-pro4-ref", "uniphier-ph1-pro4-ref.dtb", },
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{ "socionext,ph1-pro5-4kbox", "uniphier-ph1-pro5-4kbox.dtb", },
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{ "socionext,ph1-sld3-ref", "uniphier-ph1-sld3-ref.dtb", },
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{ "socionext,ph1-sld8-ref", "uniphier-ph1-sld8-ref.dtb", },
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{ "socionext,proxstream2-gentil", "uniphier-proxstream2-gentil.dtb", },
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{ "socionext,proxstream2-vodka", "uniphier-proxstream2-vodka.dtb", },
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};
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static void uniphier_set_fdt_file(void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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int i;
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/* lookup DTB file name based on the compatible string */
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for (i = 0; i < ARRAY_SIZE(uniphier_fdt_files); i++) {
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if (!fdt_node_check_compatible(gd->fdt_blob, 0,
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uniphier_fdt_files[i].compatible)) {
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setenv("fdt_file", uniphier_fdt_files[i].file_name);
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return;
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}
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}
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}
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int board_late_init(void)
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{
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puts("MODE: ");
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switch (spl_boot_device()) {
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case BOOT_DEVICE_MMC1:
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printf("eMMC Boot\n");
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setenv("bootmode", "emmcboot");
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break;
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case BOOT_DEVICE_NAND:
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printf("NAND Boot\n");
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setenv("bootmode", "nandboot");
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nand_denali_wp_disable();
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break;
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case BOOT_DEVICE_NOR:
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printf("NOR Boot\n");
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setenv("bootmode", "norboot");
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break;
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default:
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printf("Unsupported Boot Mode\n");
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return -1;
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}
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uniphier_set_fdt_file();
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return 0;
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}
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