1 /* 2 * Copyright 2014 Broadcom Corporation. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <config.h> 8 #include <common.h> 9 #include <errno.h> 10 #include <fastboot.h> 11 #include <fb_mmc.h> 12 #include <part.h> 13 #include <aboot.h> 14 #include <sparse_format.h> 15 #include <mmc.h> 16 17 #ifndef CONFIG_FASTBOOT_GPT_NAME 18 #define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME 19 #endif 20 21 static char *response_str; 22 23 struct fb_mmc_sparse { 24 block_dev_desc_t *dev_desc; 25 }; 26 27 static int get_partition_info_efi_by_name_or_alias(block_dev_desc_t *dev_desc, 28 const char *name, disk_partition_t *info) 29 { 30 int ret; 31 32 ret = get_partition_info_efi_by_name(dev_desc, name, info); 33 if (ret) { 34 /* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */ 35 char env_alias_name[25 + 32 + 1]; 36 char *aliased_part_name; 37 38 /* check for alias */ 39 strcpy(env_alias_name, "fastboot_partition_alias_"); 40 strncat(env_alias_name, name, 32); 41 aliased_part_name = getenv(env_alias_name); 42 if (aliased_part_name != NULL) 43 ret = get_partition_info_efi_by_name(dev_desc, 44 aliased_part_name, info); 45 } 46 return ret; 47 } 48 49 50 static int fb_mmc_sparse_write(struct sparse_storage *storage, 51 void *priv, 52 unsigned int offset, 53 unsigned int size, 54 char *data) 55 { 56 struct fb_mmc_sparse *sparse = priv; 57 block_dev_desc_t *dev_desc = sparse->dev_desc; 58 int ret; 59 60 ret = dev_desc->block_write(dev_desc->dev, offset, size, data); 61 if (!ret) 62 return -EIO; 63 64 return ret; 65 } 66 67 static void write_raw_image(block_dev_desc_t *dev_desc, disk_partition_t *info, 68 const char *part_name, void *buffer, 69 unsigned int download_bytes) 70 { 71 lbaint_t blkcnt; 72 lbaint_t blks; 73 74 /* determine number of blocks to write */ 75 blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1)); 76 blkcnt = blkcnt / info->blksz; 77 78 if (blkcnt > info->size) { 79 error("too large for partition: '%s'\n", part_name); 80 fastboot_fail(response_str, "too large for partition"); 81 return; 82 } 83 84 puts("Flashing Raw Image\n"); 85 86 blks = dev_desc->block_write(dev_desc->dev, info->start, blkcnt, 87 buffer); 88 if (blks != blkcnt) { 89 error("failed writing to device %d\n", dev_desc->dev); 90 fastboot_fail(response_str, "failed writing to device"); 91 return; 92 } 93 94 printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz, 95 part_name); 96 fastboot_okay(response_str, ""); 97 } 98 99 void fb_mmc_flash_write(const char *cmd, void *download_buffer, 100 unsigned int download_bytes, char *response) 101 { 102 block_dev_desc_t *dev_desc; 103 disk_partition_t info; 104 105 /* initialize the response buffer */ 106 response_str = response; 107 108 dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV); 109 if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) { 110 error("invalid mmc device\n"); 111 fastboot_fail(response_str, "invalid mmc device"); 112 return; 113 } 114 115 if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) { 116 printf("%s: updating MBR, Primary and Backup GPT(s)\n", 117 __func__); 118 if (is_valid_gpt_buf(dev_desc, download_buffer)) { 119 printf("%s: invalid GPT - refusing to write to flash\n", 120 __func__); 121 fastboot_fail(response_str, "invalid GPT partition"); 122 return; 123 } 124 if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) { 125 printf("%s: writing GPT partitions failed\n", __func__); 126 fastboot_fail(response_str, 127 "writing GPT partitions failed"); 128 return; 129 } 130 printf("........ success\n"); 131 fastboot_okay(response_str, ""); 132 return; 133 } else if (get_partition_info_efi_by_name_or_alias(dev_desc, cmd, &info)) { 134 error("cannot find partition: '%s'\n", cmd); 135 fastboot_fail(response_str, "cannot find partition"); 136 return; 137 } 138 139 if (is_sparse_image(download_buffer)) { 140 struct fb_mmc_sparse sparse_priv; 141 sparse_storage_t sparse; 142 143 sparse_priv.dev_desc = dev_desc; 144 145 sparse.block_sz = info.blksz; 146 sparse.start = info.start; 147 sparse.size = info.size; 148 sparse.name = cmd; 149 sparse.write = fb_mmc_sparse_write; 150 151 printf("Flashing sparse image at offset " LBAFU "\n", 152 info.start); 153 154 store_sparse_image(&sparse, &sparse_priv, download_buffer); 155 } else { 156 write_raw_image(dev_desc, &info, cmd, download_buffer, 157 download_bytes); 158 } 159 160 fastboot_okay(response_str, ""); 161 } 162 163 void fb_mmc_erase(const char *cmd, char *response) 164 { 165 int ret; 166 block_dev_desc_t *dev_desc; 167 disk_partition_t info; 168 lbaint_t blks, blks_start, blks_size, grp_size; 169 struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV); 170 171 if (mmc == NULL) { 172 error("invalid mmc device"); 173 fastboot_fail(response_str, "invalid mmc device"); 174 return; 175 } 176 177 /* initialize the response buffer */ 178 response_str = response; 179 180 dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV); 181 if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) { 182 error("invalid mmc device"); 183 fastboot_fail(response_str, "invalid mmc device"); 184 return; 185 } 186 187 ret = get_partition_info_efi_by_name_or_alias(dev_desc, cmd, &info); 188 if (ret) { 189 error("cannot find partition: '%s'", cmd); 190 fastboot_fail(response_str, "cannot find partition"); 191 return; 192 } 193 194 /* Align blocks to erase group size to avoid erasing other partitions */ 195 grp_size = mmc->erase_grp_size; 196 blks_start = (info.start + grp_size - 1) & ~(grp_size - 1); 197 if (info.size >= grp_size) 198 blks_size = (info.size - (blks_start - info.start)) & 199 (~(grp_size - 1)); 200 else 201 blks_size = 0; 202 203 printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n", 204 blks_start, blks_start + blks_size); 205 206 blks = dev_desc->block_erase(dev_desc->dev, blks_start, blks_size); 207 if (blks != blks_size) { 208 error("failed erasing from device %d", dev_desc->dev); 209 fastboot_fail(response_str, "failed erasing from device"); 210 return; 211 } 212 213 printf("........ erased " LBAFU " bytes from '%s'\n", 214 blks_size * info.blksz, cmd); 215 fastboot_okay(response_str, ""); 216 } 217