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