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, (u8 *)spl_image.load_addr, 0); 92 } 93 94 end: 95 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT 96 if (err <= 0) 97 printf("%s: error reading image %s, err - %d\n", 98 __func__, filename, err); 99 #endif 100 101 return (err <= 0); 102 } 103 104 #ifdef CONFIG_SPL_OS_BOOT 105 int spl_load_image_fat_os(struct blk_desc *block_dev, int partition) 106 { 107 int err; 108 __maybe_unused char *file; 109 110 err = spl_register_fat_device(block_dev, partition); 111 if (err) 112 return err; 113 114 #if defined(CONFIG_SPL_ENV_SUPPORT) && defined(CONFIG_SPL_OS_BOOT) 115 file = getenv("falcon_args_file"); 116 if (file) { 117 err = file_fat_read(file, (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0); 118 if (err <= 0) { 119 printf("spl: error reading image %s, err - %d, falling back to default\n", 120 file, err); 121 goto defaults; 122 } 123 file = getenv("falcon_image_file"); 124 if (file) { 125 err = spl_load_image_fat(block_dev, partition, file); 126 if (err != 0) { 127 puts("spl: falling back to default\n"); 128 goto defaults; 129 } 130 131 return 0; 132 } else 133 puts("spl: falcon_image_file not set in environment, falling back to default\n"); 134 } else 135 puts("spl: falcon_args_file not set in environment, falling back to default\n"); 136 137 defaults: 138 #endif 139 140 err = file_fat_read(CONFIG_SPL_FS_LOAD_ARGS_NAME, 141 (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0); 142 if (err <= 0) { 143 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT 144 printf("%s: error reading image %s, err - %d\n", 145 __func__, CONFIG_SPL_FS_LOAD_ARGS_NAME, err); 146 #endif 147 return -1; 148 } 149 150 return spl_load_image_fat(block_dev, partition, 151 CONFIG_SPL_FS_LOAD_KERNEL_NAME); 152 } 153 #else 154 int spl_load_image_fat_os(struct blk_desc *block_dev, int partition) 155 { 156 return -ENOSYS; 157 } 158 #endif 159 #endif 160