fb_mmc.c 5.2 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 <blk.h>
  9. #include <fastboot.h>
  10. #include <fb_mmc.h>
  11. #include <image-sparse.h>
  12. #include <part.h>
  13. #include <mmc.h>
  14. #include <div64.h>
  15. #ifndef CONFIG_FASTBOOT_GPT_NAME
  16. #define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME
  17. #endif
  18. struct fb_mmc_sparse {
  19. struct blk_desc *dev_desc;
  20. };
  21. static int part_get_info_efi_by_name_or_alias(struct blk_desc *dev_desc,
  22. const char *name, disk_partition_t *info)
  23. {
  24. int ret;
  25. ret = part_get_info_by_name(dev_desc, name, info);
  26. if (ret) {
  27. /* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */
  28. char env_alias_name[25 + 32 + 1];
  29. char *aliased_part_name;
  30. /* check for alias */
  31. strcpy(env_alias_name, "fastboot_partition_alias_");
  32. strncat(env_alias_name, name, 32);
  33. aliased_part_name = getenv(env_alias_name);
  34. if (aliased_part_name != NULL)
  35. ret = part_get_info_by_name(dev_desc,
  36. aliased_part_name, info);
  37. }
  38. return ret;
  39. }
  40. static lbaint_t fb_mmc_sparse_write(struct sparse_storage *info,
  41. lbaint_t blk, lbaint_t blkcnt, const void *buffer)
  42. {
  43. struct fb_mmc_sparse *sparse = info->priv;
  44. struct blk_desc *dev_desc = sparse->dev_desc;
  45. return blk_dwrite(dev_desc, blk, blkcnt, buffer);
  46. }
  47. static lbaint_t fb_mmc_sparse_reserve(struct sparse_storage *info,
  48. lbaint_t blk, lbaint_t blkcnt)
  49. {
  50. return blkcnt;
  51. }
  52. static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info,
  53. const char *part_name, void *buffer,
  54. unsigned int download_bytes)
  55. {
  56. lbaint_t blkcnt;
  57. lbaint_t blks;
  58. /* determine number of blocks to write */
  59. blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
  60. blkcnt = lldiv(blkcnt, info->blksz);
  61. if (blkcnt > info->size) {
  62. error("too large for partition: '%s'\n", part_name);
  63. fastboot_fail("too large for partition");
  64. return;
  65. }
  66. puts("Flashing Raw Image\n");
  67. blks = blk_dwrite(dev_desc, info->start, blkcnt, buffer);
  68. if (blks != blkcnt) {
  69. error("failed writing to device %d\n", dev_desc->devnum);
  70. fastboot_fail("failed writing to device");
  71. return;
  72. }
  73. printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
  74. part_name);
  75. fastboot_okay("");
  76. }
  77. void fb_mmc_flash_write(const char *cmd, void *download_buffer,
  78. unsigned int download_bytes)
  79. {
  80. struct blk_desc *dev_desc;
  81. disk_partition_t info;
  82. dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
  83. if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
  84. error("invalid mmc device\n");
  85. fastboot_fail("invalid mmc device");
  86. return;
  87. }
  88. if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
  89. printf("%s: updating MBR, Primary and Backup GPT(s)\n",
  90. __func__);
  91. if (is_valid_gpt_buf(dev_desc, download_buffer)) {
  92. printf("%s: invalid GPT - refusing to write to flash\n",
  93. __func__);
  94. fastboot_fail("invalid GPT partition");
  95. return;
  96. }
  97. if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
  98. printf("%s: writing GPT partitions failed\n", __func__);
  99. fastboot_fail(
  100. "writing GPT partitions failed");
  101. return;
  102. }
  103. printf("........ success\n");
  104. fastboot_okay("");
  105. return;
  106. } else if (part_get_info_efi_by_name_or_alias(dev_desc, cmd, &info)) {
  107. error("cannot find partition: '%s'\n", cmd);
  108. fastboot_fail("cannot find partition");
  109. return;
  110. }
  111. if (is_sparse_image(download_buffer)) {
  112. struct fb_mmc_sparse sparse_priv;
  113. struct sparse_storage sparse;
  114. sparse_priv.dev_desc = dev_desc;
  115. sparse.blksz = info.blksz;
  116. sparse.start = info.start;
  117. sparse.size = info.size;
  118. sparse.write = fb_mmc_sparse_write;
  119. sparse.reserve = fb_mmc_sparse_reserve;
  120. printf("Flashing sparse image at offset " LBAFU "\n",
  121. sparse.start);
  122. sparse.priv = &sparse_priv;
  123. write_sparse_image(&sparse, cmd, download_buffer,
  124. download_bytes);
  125. } else {
  126. write_raw_image(dev_desc, &info, cmd, download_buffer,
  127. download_bytes);
  128. }
  129. }
  130. void fb_mmc_erase(const char *cmd)
  131. {
  132. int ret;
  133. struct blk_desc *dev_desc;
  134. disk_partition_t info;
  135. lbaint_t blks, blks_start, blks_size, grp_size;
  136. struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
  137. if (mmc == NULL) {
  138. error("invalid mmc device");
  139. fastboot_fail("invalid mmc device");
  140. return;
  141. }
  142. dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
  143. if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
  144. error("invalid mmc device");
  145. fastboot_fail("invalid mmc device");
  146. return;
  147. }
  148. ret = part_get_info_efi_by_name_or_alias(dev_desc, cmd, &info);
  149. if (ret) {
  150. error("cannot find partition: '%s'", cmd);
  151. fastboot_fail("cannot find partition");
  152. return;
  153. }
  154. /* Align blocks to erase group size to avoid erasing other partitions */
  155. grp_size = mmc->erase_grp_size;
  156. blks_start = (info.start + grp_size - 1) & ~(grp_size - 1);
  157. if (info.size >= grp_size)
  158. blks_size = (info.size - (blks_start - info.start)) &
  159. (~(grp_size - 1));
  160. else
  161. blks_size = 0;
  162. printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n",
  163. blks_start, blks_start + blks_size);
  164. blks = blk_derase(dev_desc, blks_start, blks_size);
  165. if (blks != blks_size) {
  166. error("failed erasing from device %d", dev_desc->devnum);
  167. fastboot_fail("failed erasing from device");
  168. return;
  169. }
  170. printf("........ erased " LBAFU " bytes from '%s'\n",
  171. blks_size * info.blksz, cmd);
  172. fastboot_okay("");
  173. }