1 /* 2 * Copyright (C) 2011 OMICRON electronics GmbH 3 * 4 * based on drivers/mtd/nand/nand_spl_load.c 5 * 6 * Copyright (C) 2011 7 * Heiko Schocher, DENX Software Engineering, hs@denx.de. 8 * 9 * SPDX-License-Identifier: GPL-2.0+ 10 */ 11 12 #include <common.h> 13 #include <spi.h> 14 #include <spi_flash.h> 15 #include <errno.h> 16 #include <spl.h> 17 18 #ifdef CONFIG_SPL_OS_BOOT 19 /* 20 * Load the kernel, check for a valid header we can parse, and if found load 21 * the kernel and then device tree. 22 */ 23 static int spi_load_image_os(struct spi_flash *flash, 24 struct image_header *header) 25 { 26 int err; 27 28 /* Read for a header, parse or error out. */ 29 spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, 0x40, 30 (void *)header); 31 32 if (image_get_magic(header) != IH_MAGIC) 33 return -1; 34 35 err = spl_parse_image_header(&spl_image, header); 36 if (err) 37 return err; 38 39 spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, 40 spl_image.size, (void *)spl_image.load_addr); 41 42 /* Read device tree. */ 43 spi_flash_read(flash, CONFIG_SYS_SPI_ARGS_OFFS, 44 CONFIG_SYS_SPI_ARGS_SIZE, 45 (void *)CONFIG_SYS_SPL_ARGS_ADDR); 46 47 return 0; 48 } 49 #endif 50 51 static ulong spl_spi_fit_read(struct spl_load_info *load, ulong sector, 52 ulong count, void *buf) 53 { 54 struct spi_flash *flash = load->dev; 55 ulong ret; 56 57 ret = spi_flash_read(flash, sector, count, buf); 58 if (!ret) 59 return count; 60 else 61 return 0; 62 } 63 /* 64 * The main entry for SPI booting. It's necessary that SDRAM is already 65 * configured and available since this code loads the main U-Boot image 66 * from SPI into SDRAM and starts it from there. 67 */ 68 static int spl_spi_load_image(struct spl_boot_device *bootdev) 69 { 70 int err = 0; 71 struct spi_flash *flash; 72 struct image_header *header; 73 74 /* 75 * Load U-Boot image from SPI flash into RAM 76 */ 77 78 flash = spi_flash_probe(CONFIG_SF_DEFAULT_BUS, 79 CONFIG_SF_DEFAULT_CS, 80 CONFIG_SF_DEFAULT_SPEED, 81 CONFIG_SF_DEFAULT_MODE); 82 if (!flash) { 83 puts("SPI probe failed.\n"); 84 return -ENODEV; 85 } 86 87 /* use CONFIG_SYS_TEXT_BASE as temporary storage area */ 88 header = (struct image_header *)(CONFIG_SYS_TEXT_BASE); 89 90 #ifdef CONFIG_SPL_OS_BOOT 91 if (spl_start_uboot() || spi_load_image_os(flash, header)) 92 #endif 93 { 94 /* Load u-boot, mkimage header is 64 bytes. */ 95 err = spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS, 0x40, 96 (void *)header); 97 if (err) 98 return err; 99 100 if (IS_ENABLED(CONFIG_SPL_LOAD_FIT)) { 101 struct spl_load_info load; 102 103 debug("Found FIT\n"); 104 load.dev = flash; 105 load.priv = NULL; 106 load.filename = NULL; 107 load.bl_len = 1; 108 load.read = spl_spi_fit_read; 109 err = spl_load_simple_fit(&load, 110 CONFIG_SYS_SPI_U_BOOT_OFFS, 111 header); 112 } else { 113 err = spl_parse_image_header(&spl_image, header); 114 if (err) 115 return err; 116 err = spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS, 117 spl_image.size, 118 (void *)spl_image.load_addr); 119 } 120 } 121 122 return err; 123 } 124 /* Use priorty 1 so that boards can override this */ 125 SPL_LOAD_IMAGE_METHOD(1, BOOT_DEVICE_SPI, spl_spi_load_image); 126