fb_mmc.c 5.7 KB

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  1. /*
  2. * Copyright 2014 Broadcom Corporation.
  3. *
  4. * SPDX-License-Identifier: GPL-2.0+
  5. */
  6. #include <config.h>
  7. #include <common.h>
  8. #include <errno.h>
  9. #include <fastboot.h>
  10. #include <fb_mmc.h>
  11. #include <image-sparse.h>
  12. #include <part.h>
  13. #include <sparse_format.h>
  14. #include <mmc.h>
  15. #include <div64.h>
  16. #ifndef CONFIG_FASTBOOT_GPT_NAME
  17. #define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME
  18. #endif
  19. static char *response_str;
  20. struct fb_mmc_sparse {
  21. block_dev_desc_t *dev_desc;
  22. };
  23. static int get_partition_info_efi_by_name_or_alias(block_dev_desc_t *dev_desc,
  24. const char *name, disk_partition_t *info)
  25. {
  26. int ret;
  27. ret = get_partition_info_efi_by_name(dev_desc, name, info);
  28. if (ret) {
  29. /* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */
  30. char env_alias_name[25 + 32 + 1];
  31. char *aliased_part_name;
  32. /* check for alias */
  33. strcpy(env_alias_name, "fastboot_partition_alias_");
  34. strncat(env_alias_name, name, 32);
  35. aliased_part_name = getenv(env_alias_name);
  36. if (aliased_part_name != NULL)
  37. ret = get_partition_info_efi_by_name(dev_desc,
  38. aliased_part_name, info);
  39. }
  40. return ret;
  41. }
  42. static int fb_mmc_sparse_write(struct sparse_storage *storage,
  43. void *priv,
  44. unsigned int offset,
  45. unsigned int size,
  46. char *data)
  47. {
  48. struct fb_mmc_sparse *sparse = priv;
  49. block_dev_desc_t *dev_desc = sparse->dev_desc;
  50. int ret;
  51. ret = dev_desc->block_write(dev_desc, offset, size, data);
  52. if (!ret)
  53. return -EIO;
  54. return ret;
  55. }
  56. static void write_raw_image(block_dev_desc_t *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. /* determine number of blocks to write */
  63. blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
  64. blkcnt = lldiv(blkcnt, info->blksz);
  65. if (blkcnt > info->size) {
  66. error("too large for partition: '%s'\n", part_name);
  67. fastboot_fail(response_str, "too large for partition");
  68. return;
  69. }
  70. puts("Flashing Raw Image\n");
  71. blks = dev_desc->block_write(dev_desc, info->start, blkcnt, buffer);
  72. if (blks != blkcnt) {
  73. error("failed writing to device %d\n", dev_desc->dev);
  74. fastboot_fail(response_str, "failed writing to device");
  75. return;
  76. }
  77. printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
  78. part_name);
  79. fastboot_okay(response_str, "");
  80. }
  81. void fb_mmc_flash_write(const char *cmd, unsigned int session_id,
  82. void *download_buffer, unsigned int download_bytes,
  83. char *response)
  84. {
  85. block_dev_desc_t *dev_desc;
  86. disk_partition_t info;
  87. /* initialize the response buffer */
  88. response_str = response;
  89. dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
  90. if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
  91. error("invalid mmc device\n");
  92. fastboot_fail(response_str, "invalid mmc device");
  93. return;
  94. }
  95. if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
  96. printf("%s: updating MBR, Primary and Backup GPT(s)\n",
  97. __func__);
  98. if (is_valid_gpt_buf(dev_desc, download_buffer)) {
  99. printf("%s: invalid GPT - refusing to write to flash\n",
  100. __func__);
  101. fastboot_fail(response_str, "invalid GPT partition");
  102. return;
  103. }
  104. if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
  105. printf("%s: writing GPT partitions failed\n", __func__);
  106. fastboot_fail(response_str,
  107. "writing GPT partitions failed");
  108. return;
  109. }
  110. printf("........ success\n");
  111. fastboot_okay(response_str, "");
  112. return;
  113. } else if (get_partition_info_efi_by_name_or_alias(dev_desc, cmd, &info)) {
  114. error("cannot find partition: '%s'\n", cmd);
  115. fastboot_fail(response_str, "cannot find partition");
  116. return;
  117. }
  118. if (is_sparse_image(download_buffer)) {
  119. struct fb_mmc_sparse sparse_priv;
  120. sparse_storage_t sparse;
  121. sparse_priv.dev_desc = dev_desc;
  122. sparse.block_sz = info.blksz;
  123. sparse.start = info.start;
  124. sparse.size = info.size;
  125. sparse.name = cmd;
  126. sparse.write = fb_mmc_sparse_write;
  127. printf("Flashing sparse image at offset " LBAFU "\n",
  128. info.start);
  129. store_sparse_image(&sparse, &sparse_priv, session_id,
  130. download_buffer);
  131. } else {
  132. write_raw_image(dev_desc, &info, cmd, download_buffer,
  133. download_bytes);
  134. }
  135. fastboot_okay(response_str, "");
  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. if (mmc == NULL) {
  145. error("invalid mmc device");
  146. fastboot_fail(response_str, "invalid mmc device");
  147. return;
  148. }
  149. /* initialize the response buffer */
  150. response_str = response;
  151. dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
  152. if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
  153. error("invalid mmc device");
  154. fastboot_fail(response_str, "invalid mmc device");
  155. return;
  156. }
  157. ret = get_partition_info_efi_by_name_or_alias(dev_desc, cmd, &info);
  158. if (ret) {
  159. error("cannot find partition: '%s'", cmd);
  160. fastboot_fail(response_str, "cannot find partition");
  161. return;
  162. }
  163. /* Align blocks to erase group size to avoid erasing other partitions */
  164. grp_size = mmc->erase_grp_size;
  165. blks_start = (info.start + grp_size - 1) & ~(grp_size - 1);
  166. if (info.size >= grp_size)
  167. blks_size = (info.size - (blks_start - info.start)) &
  168. (~(grp_size - 1));
  169. else
  170. blks_size = 0;
  171. printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n",
  172. blks_start, blks_start + blks_size);
  173. blks = dev_desc->block_erase(dev_desc, blks_start, blks_size);
  174. if (blks != blks_size) {
  175. error("failed erasing from device %d", dev_desc->dev);
  176. fastboot_fail(response_str, "failed erasing from device");
  177. return;
  178. }
  179. printf("........ erased " LBAFU " bytes from '%s'\n",
  180. blks_size * info.blksz, cmd);
  181. fastboot_okay(response_str, "");
  182. }