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