1 /* 2 * (C) Copyright 2014 3 * Texas Instruments, <www.ti.com> 4 * 5 * Dan Murphy <dmurphy@ti.com> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 * 9 * FAT Image Functions copied from spl_mmc.c 10 */ 11 12 #include <common.h> 13 #include <spl.h> 14 #include <asm/u-boot.h> 15 #include <fat.h> 16 #include <errno.h> 17 #include <image.h> 18 #include <libfdt.h> 19 20 static int fat_registered; 21 22 #ifdef CONFIG_SPL_FAT_SUPPORT 23 static int spl_register_fat_device(struct blk_desc *block_dev, int partition) 24 { 25 int err = 0; 26 27 if (fat_registered) 28 return err; 29 30 err = fat_register_device(block_dev, partition); 31 if (err) { 32 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT 33 printf("%s: fat register err - %d\n", __func__, err); 34 #endif 35 return err; 36 } 37 38 fat_registered = 1; 39 40 return err; 41 } 42 43 static ulong spl_fit_read(struct spl_load_info *load, ulong file_offset, 44 ulong size, void *buf) 45 { 46 loff_t actread; 47 int ret; 48 char *filename = (char *)load->filename; 49 50 ret = fat_read_file(filename, buf, file_offset, size, &actread); 51 if (ret) 52 return ret; 53 54 return actread; 55 } 56 57 int spl_load_image_fat(struct blk_desc *block_dev, 58 int partition, 59 const char *filename) 60 { 61 int err; 62 struct image_header *header; 63 64 err = spl_register_fat_device(block_dev, partition); 65 if (err) 66 goto end; 67 68 header = (struct image_header *)(CONFIG_SYS_TEXT_BASE - 69 sizeof(struct image_header)); 70 71 err = file_fat_read(filename, header, sizeof(struct image_header)); 72 if (err <= 0) 73 goto end; 74 75 if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) && 76 image_get_magic(header) == FDT_MAGIC) { 77 struct spl_load_info load; 78 79 debug("Found FIT\n"); 80 load.read = spl_fit_read; 81 load.bl_len = 1; 82 load.filename = (void *)filename; 83 load.priv = NULL; 84 85 return spl_load_simple_fit(&load, 0, header); 86 } else { 87 err = spl_parse_image_header(header); 88 if (err) 89 goto end; 90 91 err = file_fat_read(filename, 92 (u8 *)(uintptr_t)spl_image.load_addr, 0); 93 } 94 95 end: 96 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT 97 if (err <= 0) 98 printf("%s: error reading image %s, err - %d\n", 99 __func__, filename, err); 100 #endif 101 102 return (err <= 0); 103 } 104 105 #ifdef CONFIG_SPL_OS_BOOT 106 int spl_load_image_fat_os(struct blk_desc *block_dev, int partition) 107 { 108 int err; 109 __maybe_unused char *file; 110 111 err = spl_register_fat_device(block_dev, partition); 112 if (err) 113 return err; 114 115 #if defined(CONFIG_SPL_ENV_SUPPORT) && defined(CONFIG_SPL_OS_BOOT) 116 file = getenv("falcon_args_file"); 117 if (file) { 118 err = file_fat_read(file, (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0); 119 if (err <= 0) { 120 printf("spl: error reading image %s, err - %d, falling back to default\n", 121 file, err); 122 goto defaults; 123 } 124 file = getenv("falcon_image_file"); 125 if (file) { 126 err = spl_load_image_fat(block_dev, partition, file); 127 if (err != 0) { 128 puts("spl: falling back to default\n"); 129 goto defaults; 130 } 131 132 return 0; 133 } else 134 puts("spl: falcon_image_file not set in environment, falling back to default\n"); 135 } else 136 puts("spl: falcon_args_file not set in environment, falling back to default\n"); 137 138 defaults: 139 #endif 140 141 err = file_fat_read(CONFIG_SPL_FS_LOAD_ARGS_NAME, 142 (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0); 143 if (err <= 0) { 144 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT 145 printf("%s: error reading image %s, err - %d\n", 146 __func__, CONFIG_SPL_FS_LOAD_ARGS_NAME, err); 147 #endif 148 return -1; 149 } 150 151 return spl_load_image_fat(block_dev, partition, 152 CONFIG_SPL_FS_LOAD_KERNEL_NAME); 153 } 154 #else 155 int spl_load_image_fat_os(struct blk_desc *block_dev, int partition) 156 { 157 return -ENOSYS; 158 } 159 #endif 160 #endif 161