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 <blk.h> 10 #include <errno.h> 11 #include <fastboot.h> 12 #include <fb_mmc.h> 13 #include <image-sparse.h> 14 #include <part.h> 15 #include <sparse_format.h> 16 #include <mmc.h> 17 #include <div64.h> 18 19 #ifndef CONFIG_FASTBOOT_GPT_NAME 20 #define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME 21 #endif 22 23 static char *response_str; 24 25 struct fb_mmc_sparse { 26 struct blk_desc *dev_desc; 27 }; 28 29 static int part_get_info_efi_by_name_or_alias(struct blk_desc *dev_desc, 30 const char *name, disk_partition_t *info) 31 { 32 int ret; 33 34 ret = part_get_info_efi_by_name(dev_desc, name, info); 35 if (ret) { 36 /* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */ 37 char env_alias_name[25 + 32 + 1]; 38 char *aliased_part_name; 39 40 /* check for alias */ 41 strcpy(env_alias_name, "fastboot_partition_alias_"); 42 strncat(env_alias_name, name, 32); 43 aliased_part_name = getenv(env_alias_name); 44 if (aliased_part_name != NULL) 45 ret = part_get_info_efi_by_name(dev_desc, 46 aliased_part_name, info); 47 } 48 return ret; 49 } 50 51 52 static int fb_mmc_sparse_write(struct sparse_storage *storage, 53 void *priv, 54 unsigned int offset, 55 unsigned int size, 56 char *data) 57 { 58 struct fb_mmc_sparse *sparse = priv; 59 struct blk_desc *dev_desc = sparse->dev_desc; 60 int ret; 61 62 ret = blk_dwrite(dev_desc, offset, size, data); 63 if (!ret) 64 return -EIO; 65 66 return ret; 67 } 68 69 static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info, 70 const char *part_name, void *buffer, 71 unsigned int download_bytes) 72 { 73 lbaint_t blkcnt; 74 lbaint_t blks; 75 76 /* determine number of blocks to write */ 77 blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1)); 78 blkcnt = lldiv(blkcnt, info->blksz); 79 80 if (blkcnt > info->size) { 81 error("too large for partition: '%s'\n", part_name); 82 fastboot_fail(response_str, "too large for partition"); 83 return; 84 } 85 86 puts("Flashing Raw Image\n"); 87 88 blks = blk_dwrite(dev_desc, info->start, blkcnt, buffer); 89 if (blks != blkcnt) { 90 error("failed writing to device %d\n", dev_desc->devnum); 91 fastboot_fail(response_str, "failed writing to device"); 92 return; 93 } 94 95 printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz, 96 part_name); 97 fastboot_okay(response_str, ""); 98 } 99 100 void fb_mmc_flash_write(const char *cmd, unsigned int session_id, 101 void *download_buffer, unsigned int download_bytes, 102 char *response) 103 { 104 struct blk_desc *dev_desc; 105 disk_partition_t info; 106 107 /* initialize the response buffer */ 108 response_str = response; 109 110 dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV); 111 if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) { 112 error("invalid mmc device\n"); 113 fastboot_fail(response_str, "invalid mmc device"); 114 return; 115 } 116 117 if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) { 118 printf("%s: updating MBR, Primary and Backup GPT(s)\n", 119 __func__); 120 if (is_valid_gpt_buf(dev_desc, download_buffer)) { 121 printf("%s: invalid GPT - refusing to write to flash\n", 122 __func__); 123 fastboot_fail(response_str, "invalid GPT partition"); 124 return; 125 } 126 if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) { 127 printf("%s: writing GPT partitions failed\n", __func__); 128 fastboot_fail(response_str, 129 "writing GPT partitions failed"); 130 return; 131 } 132 printf("........ success\n"); 133 fastboot_okay(response_str, ""); 134 return; 135 } else if (part_get_info_efi_by_name_or_alias(dev_desc, cmd, &info)) { 136 error("cannot find partition: '%s'\n", cmd); 137 fastboot_fail(response_str, "cannot find partition"); 138 return; 139 } 140 141 if (is_sparse_image(download_buffer)) { 142 struct fb_mmc_sparse sparse_priv; 143 sparse_storage_t sparse; 144 145 sparse_priv.dev_desc = dev_desc; 146 147 sparse.block_sz = info.blksz; 148 sparse.start = info.start; 149 sparse.size = info.size; 150 sparse.name = cmd; 151 sparse.write = fb_mmc_sparse_write; 152 153 printf("Flashing sparse image at offset " LBAFU "\n", 154 info.start); 155 156 store_sparse_image(&sparse, &sparse_priv, session_id, 157 download_buffer); 158 } else { 159 write_raw_image(dev_desc, &info, cmd, download_buffer, 160 download_bytes); 161 } 162 163 fastboot_okay(response_str, ""); 164 } 165 166 void fb_mmc_erase(const char *cmd, char *response) 167 { 168 int ret; 169 struct blk_desc *dev_desc; 170 disk_partition_t info; 171 lbaint_t blks, blks_start, blks_size, grp_size; 172 struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV); 173 174 if (mmc == NULL) { 175 error("invalid mmc device"); 176 fastboot_fail(response_str, "invalid mmc device"); 177 return; 178 } 179 180 /* initialize the response buffer */ 181 response_str = response; 182 183 dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV); 184 if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) { 185 error("invalid mmc device"); 186 fastboot_fail(response_str, "invalid mmc device"); 187 return; 188 } 189 190 ret = part_get_info_efi_by_name_or_alias(dev_desc, cmd, &info); 191 if (ret) { 192 error("cannot find partition: '%s'", cmd); 193 fastboot_fail(response_str, "cannot find partition"); 194 return; 195 } 196 197 /* Align blocks to erase group size to avoid erasing other partitions */ 198 grp_size = mmc->erase_grp_size; 199 blks_start = (info.start + grp_size - 1) & ~(grp_size - 1); 200 if (info.size >= grp_size) 201 blks_size = (info.size - (blks_start - info.start)) & 202 (~(grp_size - 1)); 203 else 204 blks_size = 0; 205 206 printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n", 207 blks_start, blks_start + blks_size); 208 209 blks = dev_desc->block_erase(dev_desc, blks_start, blks_size); 210 if (blks != blks_size) { 211 error("failed erasing from device %d", dev_desc->devnum); 212 fastboot_fail(response_str, "failed erasing from device"); 213 return; 214 } 215 216 printf("........ erased " LBAFU " bytes from '%s'\n", 217 blks_size * info.blksz, cmd); 218 fastboot_okay(response_str, ""); 219 } 220