84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/*
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* Copyright (C) 2011 OMICRON electronics GmbH
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*
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* based on drivers/mtd/nand/nand_spl_load.c
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*
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* Copyright (C) 2011
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* Heiko Schocher, DENX Software Engineering, hs@denx.de.
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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 <spi.h>
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#include <spi_flash.h>
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#include <spl.h>
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#ifdef CONFIG_SPL_OS_BOOT
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/*
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* Load the kernel, check for a valid header we can parse, and if found load
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* the kernel and then device tree.
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*/
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static int spi_load_image_os(struct spi_flash *flash,
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struct image_header *header)
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{
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/* Read for a header, parse or error out. */
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spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, 0x40,
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(void *)header);
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if (image_get_magic(header) != IH_MAGIC)
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return -1;
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spl_parse_image_header(header);
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spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS,
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spl_image.size, (void *)spl_image.load_addr);
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/* Read device tree. */
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spi_flash_read(flash, CONFIG_SYS_SPI_ARGS_OFFS,
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CONFIG_SYS_SPI_ARGS_SIZE,
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(void *)CONFIG_SYS_SPL_ARGS_ADDR);
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return 0;
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}
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#endif
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/*
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* The main entry for SPI booting. It's necessary that SDRAM is already
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* configured and available since this code loads the main U-Boot image
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* from SPI into SDRAM and starts it from there.
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*/
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void spl_spi_load_image(void)
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{
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struct spi_flash *flash;
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struct image_header *header;
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/*
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* Load U-Boot image from SPI flash into RAM
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*/
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flash = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
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CONFIG_SF_DEFAULT_CS,
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CONFIG_SF_DEFAULT_SPEED,
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CONFIG_SF_DEFAULT_MODE);
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if (!flash) {
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puts("SPI probe failed.\n");
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hang();
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}
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/* use CONFIG_SYS_TEXT_BASE as temporary storage area */
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header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
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#ifdef CONFIG_SPL_OS_BOOT
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if (spl_start_uboot() || spi_load_image_os(flash, header))
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#endif
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{
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/* Load u-boot, mkimage header is 64 bytes. */
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spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS, 0x40,
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(void *)header);
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spl_parse_image_header(header);
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spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS,
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spl_image.size, (void *)spl_image.load_addr);
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}
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}
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