1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2011 OMICRON electronics GmbH 4 * 5 * based on drivers/mtd/nand/nand_spl_load.c 6 * 7 * Copyright (C) 2011 8 * Heiko Schocher, DENX Software Engineering, hs@denx.de. 9 */ 10 11 #include <common.h> 12 #include <spi.h> 13 #include <spi_flash.h> 14 #include <errno.h> 15 #include <spl.h> 16 17 DECLARE_GLOBAL_DATA_PTR; 18 19 #ifdef CONFIG_SPL_OS_BOOT 20 /* 21 * Load the kernel, check for a valid header we can parse, and if found load 22 * the kernel and then device tree. 23 */ 24 static int spi_load_image_os(struct spl_image_info *spl_image, 25 struct spi_flash *flash, 26 struct image_header *header) 27 { 28 int err; 29 30 /* Read for a header, parse or error out. */ 31 spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, 0x40, 32 (void *)header); 33 34 if (image_get_magic(header) != IH_MAGIC) 35 return -1; 36 37 err = spl_parse_image_header(spl_image, header); 38 if (err) 39 return err; 40 41 spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, 42 spl_image->size, (void *)spl_image->load_addr); 43 44 /* Read device tree. */ 45 spi_flash_read(flash, CONFIG_SYS_SPI_ARGS_OFFS, 46 CONFIG_SYS_SPI_ARGS_SIZE, 47 (void *)CONFIG_SYS_SPL_ARGS_ADDR); 48 49 return 0; 50 } 51 #endif 52 53 static ulong spl_spi_fit_read(struct spl_load_info *load, ulong sector, 54 ulong count, void *buf) 55 { 56 struct spi_flash *flash = load->dev; 57 ulong ret; 58 59 ret = spi_flash_read(flash, sector, count, buf); 60 if (!ret) 61 return count; 62 else 63 return 0; 64 } 65 /* 66 * The main entry for SPI booting. It's necessary that SDRAM is already 67 * configured and available since this code loads the main U-Boot image 68 * from SPI into SDRAM and starts it from there. 69 */ 70 static int spl_spi_load_image(struct spl_image_info *spl_image, 71 struct spl_boot_device *bootdev) 72 { 73 int err = 0; 74 unsigned payload_offs = CONFIG_SYS_SPI_U_BOOT_OFFS; 75 struct spi_flash *flash; 76 struct image_header *header; 77 78 /* 79 * Load U-Boot image from SPI flash into RAM 80 */ 81 82 flash = spi_flash_probe(CONFIG_SF_DEFAULT_BUS, 83 CONFIG_SF_DEFAULT_CS, 84 CONFIG_SF_DEFAULT_SPEED, 85 CONFIG_SF_DEFAULT_MODE); 86 if (!flash) { 87 puts("SPI probe failed.\n"); 88 return -ENODEV; 89 } 90 91 /* use CONFIG_SYS_TEXT_BASE as temporary storage area */ 92 header = (struct image_header *)(CONFIG_SYS_TEXT_BASE); 93 94 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA) 95 payload_offs = fdtdec_get_config_int(gd->fdt_blob, 96 "u-boot,spl-payload-offset", 97 payload_offs); 98 #endif 99 100 #ifdef CONFIG_SPL_OS_BOOT 101 if (spl_start_uboot() || spi_load_image_os(spl_image, flash, header)) 102 #endif 103 { 104 /* Load u-boot, mkimage header is 64 bytes. */ 105 err = spi_flash_read(flash, payload_offs, 0x40, 106 (void *)header); 107 if (err) { 108 debug("%s: Failed to read from SPI flash (err=%d)\n", 109 __func__, err); 110 return err; 111 } 112 113 if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) && 114 image_get_magic(header) == FDT_MAGIC) { 115 struct spl_load_info load; 116 117 debug("Found FIT\n"); 118 load.dev = flash; 119 load.priv = NULL; 120 load.filename = NULL; 121 load.bl_len = 1; 122 load.read = spl_spi_fit_read; 123 err = spl_load_simple_fit(spl_image, &load, 124 payload_offs, 125 header); 126 } else { 127 err = spl_parse_image_header(spl_image, header); 128 if (err) 129 return err; 130 err = spi_flash_read(flash, payload_offs, 131 spl_image->size, 132 (void *)spl_image->load_addr); 133 } 134 } 135 136 return err; 137 } 138 /* Use priorty 1 so that boards can override this */ 139 SPL_LOAD_IMAGE_METHOD("SPI", 1, BOOT_DEVICE_SPI, spl_spi_load_image); 140