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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 | // SPDX-License-Identifier: GPL-2.0+ /* * (c) Copyright 2011 by Tigris Elektronik GmbH * * Author: * Maximilian Schwerin <mvs@tigris.de> */ #include <common.h> #include <command.h> #include <env.h> #include <env_internal.h> #include <part.h> #include <malloc.h> #include <memalign.h> #include <search.h> #include <errno.h> #include <fat.h> #include <mmc.h> #include <asm/cache.h> #include <linux/stddef.h> #ifdef CONFIG_SPL_BUILD /* TODO(sjg@chromium.org): Figure out why this is needed */ # if !defined(CONFIG_TARGET_AM335X_EVM) || defined(CONFIG_SPL_OS_BOOT) # define LOADENV # endif #else # define LOADENV #endif __weak int mmc_get_env_dev(void) { #ifdef CONFIG_SYS_MMC_ENV_DEV return CONFIG_SYS_MMC_ENV_DEV; #else return 0; #endif } static char *env_fat_device_and_part(void) { #ifdef CONFIG_MMC static char *part_str; if (!part_str) { part_str = CONFIG_ENV_FAT_DEVICE_AND_PART; if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc") && part_str[0] == ':') { part_str = "0" CONFIG_ENV_FAT_DEVICE_AND_PART; part_str[0] += mmc_get_env_dev(); } } return part_str; #else return CONFIG_ENV_FAT_DEVICE_AND_PART; #endif } static int env_fat_save(void) { env_t __aligned(ARCH_DMA_MINALIGN) env_new; struct blk_desc *dev_desc = NULL; struct disk_partition info; int dev, part; int err; loff_t size; err = env_export(&env_new); if (err) return err; part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE, env_fat_device_and_part(), &dev_desc, &info, 1); if (part < 0) return 1; dev = dev_desc->devnum; if (fat_set_blk_dev(dev_desc, &info) != 0) { /* * This printf is embedded in the messages from env_save that * will calling it. The missing \n is intentional. */ printf("Unable to use %s %d:%d... ", CONFIG_ENV_FAT_INTERFACE, dev, part); return 1; } err = file_fat_write(CONFIG_ENV_FAT_FILE, (void *)&env_new, 0, sizeof(env_t), &size); if (err == -1) { /* * This printf is embedded in the messages from env_save that * will calling it. The missing \n is intentional. */ printf("Unable to write \"%s\" from %s%d:%d... ", CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part); return 1; } return 0; } #ifdef LOADENV static int env_fat_load(void) { ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE); struct blk_desc *dev_desc = NULL; struct disk_partition info; int dev, part; int err; #ifdef CONFIG_MMC if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc")) mmc_initialize(NULL); #endif part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE, env_fat_device_and_part(), &dev_desc, &info, 1); if (part < 0) goto err_env_relocate; dev = dev_desc->devnum; if (fat_set_blk_dev(dev_desc, &info) != 0) { /* * This printf is embedded in the messages from env_save that * will calling it. The missing \n is intentional. */ printf("Unable to use %s %d:%d... ", CONFIG_ENV_FAT_INTERFACE, dev, part); goto err_env_relocate; } err = file_fat_read(CONFIG_ENV_FAT_FILE, buf, CONFIG_ENV_SIZE); if (err == -1) { /* * This printf is embedded in the messages from env_save that * will calling it. The missing \n is intentional. */ printf("Unable to read \"%s\" from %s%d:%d... ", CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part); goto err_env_relocate; } return env_import(buf, 1, H_EXTERNAL); err_env_relocate: env_set_default(NULL, 0); return -EIO; } #endif /* LOADENV */ U_BOOT_ENV_LOCATION(fat) = { .location = ENVL_FAT, ENV_NAME("FAT") #ifdef LOADENV .load = env_fat_load, #endif .save = ENV_SAVE_PTR(env_fat_save), }; |