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 <image-sparse.h> 13 #include <part.h> 14 #include <sparse_format.h> 15 #include <mmc.h> 16 #include <div64.h> 17 18 #ifndef CONFIG_FASTBOOT_GPT_NAME 19 #define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME 20 #endif 21 22 static char *response_str; 23 24 struct fb_mmc_sparse { 25 block_dev_desc_t *dev_desc; 26 }; 27 28 static int get_partition_info_efi_by_name_or_alias(block_dev_desc_t *dev_desc, 29 const char *name, disk_partition_t *info) 30 { 31 int ret; 32 33 ret = get_partition_info_efi_by_name(dev_desc, name, info); 34 if (ret) { 35 /* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */ 36 char env_alias_name[25 + 32 + 1]; 37 char *aliased_part_name; 38 39 /* check for alias */ 40 strcpy(env_alias_name, "fastboot_partition_alias_"); 41 strncat(env_alias_name, name, 32); 42 aliased_part_name = getenv(env_alias_name); 43 if (aliased_part_name != NULL) 44 ret = get_partition_info_efi_by_name(dev_desc, 45 aliased_part_name, info); 46 } 47 return ret; 48 } 49 50 51 static int fb_mmc_sparse_write(struct sparse_storage *storage, 52 void *priv, 53 unsigned int offset, 54 unsigned int size, 55 char *data) 56 { 57 struct fb_mmc_sparse *sparse = priv; 58 block_dev_desc_t *dev_desc = sparse->dev_desc; 59 int ret; 60 61 ret = dev_desc->block_write(dev_desc, offset, size, data); 62 if (!ret) 63 return -EIO; 64 65 return ret; 66 } 67 68 static void write_raw_image(block_dev_desc_t *dev_desc, disk_partition_t *info, 69 const char *part_name, void *buffer, 70 unsigned int download_bytes) 71 { 72 lbaint_t blkcnt; 73 lbaint_t blks; 74 75 /* determine number of blocks to write */ 76 blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1)); 77 blkcnt = lldiv(blkcnt, info->blksz); 78 79 if (blkcnt > info->size) { 80 error("too large for partition: '%s'\n", part_name); 81 fastboot_fail(response_str, "too large for partition"); 82 return; 83 } 84 85 puts("Flashing Raw Image\n"); 86 87 blks = dev_desc->block_write(dev_desc, info->start, blkcnt, 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, unsigned int session_id, 100 void *download_buffer, unsigned int download_bytes, 101 char *response) 102 { 103 block_dev_desc_t *dev_desc; 104 disk_partition_t info; 105 106 /* initialize the response buffer */ 107 response_str = response; 108 109 dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV); 110 if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) { 111 error("invalid mmc device\n"); 112 fastboot_fail(response_str, "invalid mmc device"); 113 return; 114 } 115 116 if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) { 117 printf("%s: updating MBR, Primary and Backup GPT(s)\n", 118 __func__); 119 if (is_valid_gpt_buf(dev_desc, download_buffer)) { 120 printf("%s: invalid GPT - refusing to write to flash\n", 121 __func__); 122 fastboot_fail(response_str, "invalid GPT partition"); 123 return; 124 } 125 if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) { 126 printf("%s: writing GPT partitions failed\n", __func__); 127 fastboot_fail(response_str, 128 "writing GPT partitions failed"); 129 return; 130 } 131 printf("........ success\n"); 132 fastboot_okay(response_str, ""); 133 return; 134 } else if (get_partition_info_efi_by_name_or_alias(dev_desc, cmd, &info)) { 135 error("cannot find partition: '%s'\n", cmd); 136 fastboot_fail(response_str, "cannot find partition"); 137 return; 138 } 139 140 if (is_sparse_image(download_buffer)) { 141 struct fb_mmc_sparse sparse_priv; 142 sparse_storage_t sparse; 143 144 sparse_priv.dev_desc = dev_desc; 145 146 sparse.block_sz = info.blksz; 147 sparse.start = info.start; 148 sparse.size = info.size; 149 sparse.name = cmd; 150 sparse.write = fb_mmc_sparse_write; 151 152 printf("Flashing sparse image at offset " LBAFU "\n", 153 info.start); 154 155 store_sparse_image(&sparse, &sparse_priv, session_id, 156 download_buffer); 157 } else { 158 write_raw_image(dev_desc, &info, cmd, download_buffer, 159 download_bytes); 160 } 161 162 fastboot_okay(response_str, ""); 163 } 164 165 void fb_mmc_erase(const char *cmd, char *response) 166 { 167 int ret; 168 block_dev_desc_t *dev_desc; 169 disk_partition_t info; 170 lbaint_t blks, blks_start, blks_size, grp_size; 171 struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV); 172 173 if (mmc == NULL) { 174 error("invalid mmc device"); 175 fastboot_fail(response_str, "invalid mmc device"); 176 return; 177 } 178 179 /* initialize the response buffer */ 180 response_str = response; 181 182 dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV); 183 if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) { 184 error("invalid mmc device"); 185 fastboot_fail(response_str, "invalid mmc device"); 186 return; 187 } 188 189 ret = get_partition_info_efi_by_name_or_alias(dev_desc, cmd, &info); 190 if (ret) { 191 error("cannot find partition: '%s'", cmd); 192 fastboot_fail(response_str, "cannot find partition"); 193 return; 194 } 195 196 /* Align blocks to erase group size to avoid erasing other partitions */ 197 grp_size = mmc->erase_grp_size; 198 blks_start = (info.start + grp_size - 1) & ~(grp_size - 1); 199 if (info.size >= grp_size) 200 blks_size = (info.size - (blks_start - info.start)) & 201 (~(grp_size - 1)); 202 else 203 blks_size = 0; 204 205 printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n", 206 blks_start, blks_start + blks_size); 207 208 blks = dev_desc->block_erase(dev_desc, blks_start, blks_size); 209 if (blks != blks_size) { 210 error("failed erasing from device %d", dev_desc->dev); 211 fastboot_fail(response_str, "failed erasing from device"); 212 return; 213 } 214 215 printf("........ erased " LBAFU " bytes from '%s'\n", 216 blks_size * info.blksz, cmd); 217 fastboot_okay(response_str, ""); 218 } 219