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