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- /*
- * Copyright 2014 Broadcom Corporation.
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
- #include <config.h>
- #include <common.h>
- #include <blk.h>
- #include <fastboot.h>
- #include <fb_mmc.h>
- #include <image-sparse.h>
- #include <part.h>
- #include <mmc.h>
- #include <div64.h>
- #ifndef CONFIG_FASTBOOT_GPT_NAME
- #define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME
- #endif
- struct fb_mmc_sparse {
- struct blk_desc *dev_desc;
- };
- static int part_get_info_efi_by_name_or_alias(struct blk_desc *dev_desc,
- const char *name, disk_partition_t *info)
- {
- int ret;
- ret = part_get_info_by_name(dev_desc, name, info);
- if (ret) {
- /* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */
- char env_alias_name[25 + 32 + 1];
- char *aliased_part_name;
- /* check for alias */
- strcpy(env_alias_name, "fastboot_partition_alias_");
- strncat(env_alias_name, name, 32);
- aliased_part_name = getenv(env_alias_name);
- if (aliased_part_name != NULL)
- ret = part_get_info_by_name(dev_desc,
- aliased_part_name, info);
- }
- return ret;
- }
- static lbaint_t fb_mmc_sparse_write(struct sparse_storage *info,
- lbaint_t blk, lbaint_t blkcnt, const void *buffer)
- {
- struct fb_mmc_sparse *sparse = info->priv;
- struct blk_desc *dev_desc = sparse->dev_desc;
- return blk_dwrite(dev_desc, blk, blkcnt, buffer);
- }
- static lbaint_t fb_mmc_sparse_reserve(struct sparse_storage *info,
- lbaint_t blk, lbaint_t blkcnt)
- {
- return blkcnt;
- }
- static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info,
- const char *part_name, void *buffer,
- unsigned int download_bytes)
- {
- lbaint_t blkcnt;
- lbaint_t blks;
- /* determine number of blocks to write */
- blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
- blkcnt = lldiv(blkcnt, info->blksz);
- if (blkcnt > info->size) {
- error("too large for partition: '%s'\n", part_name);
- fastboot_fail("too large for partition");
- return;
- }
- puts("Flashing Raw Image\n");
- blks = blk_dwrite(dev_desc, info->start, blkcnt, buffer);
- if (blks != blkcnt) {
- error("failed writing to device %d\n", dev_desc->devnum);
- fastboot_fail("failed writing to device");
- return;
- }
- printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
- part_name);
- fastboot_okay("");
- }
- void fb_mmc_flash_write(const char *cmd, void *download_buffer,
- unsigned int download_bytes)
- {
- struct blk_desc *dev_desc;
- disk_partition_t info;
- dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
- if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
- error("invalid mmc device\n");
- fastboot_fail("invalid mmc device");
- return;
- }
- if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
- printf("%s: updating MBR, Primary and Backup GPT(s)\n",
- __func__);
- if (is_valid_gpt_buf(dev_desc, download_buffer)) {
- printf("%s: invalid GPT - refusing to write to flash\n",
- __func__);
- fastboot_fail("invalid GPT partition");
- return;
- }
- if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
- printf("%s: writing GPT partitions failed\n", __func__);
- fastboot_fail(
- "writing GPT partitions failed");
- return;
- }
- printf("........ success\n");
- fastboot_okay("");
- return;
- } else if (part_get_info_efi_by_name_or_alias(dev_desc, cmd, &info)) {
- error("cannot find partition: '%s'\n", cmd);
- fastboot_fail("cannot find partition");
- return;
- }
- if (is_sparse_image(download_buffer)) {
- struct fb_mmc_sparse sparse_priv;
- struct sparse_storage sparse;
- sparse_priv.dev_desc = dev_desc;
- sparse.blksz = info.blksz;
- sparse.start = info.start;
- sparse.size = info.size;
- sparse.write = fb_mmc_sparse_write;
- sparse.reserve = fb_mmc_sparse_reserve;
- printf("Flashing sparse image at offset " LBAFU "\n",
- sparse.start);
- sparse.priv = &sparse_priv;
- write_sparse_image(&sparse, cmd, download_buffer,
- download_bytes);
- } else {
- write_raw_image(dev_desc, &info, cmd, download_buffer,
- download_bytes);
- }
- }
- void fb_mmc_erase(const char *cmd)
- {
- int ret;
- struct blk_desc *dev_desc;
- disk_partition_t info;
- lbaint_t blks, blks_start, blks_size, grp_size;
- struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
- if (mmc == NULL) {
- error("invalid mmc device");
- fastboot_fail("invalid mmc device");
- return;
- }
- dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
- if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
- error("invalid mmc device");
- fastboot_fail("invalid mmc device");
- return;
- }
- ret = part_get_info_efi_by_name_or_alias(dev_desc, cmd, &info);
- if (ret) {
- error("cannot find partition: '%s'", cmd);
- fastboot_fail("cannot find partition");
- return;
- }
- /* Align blocks to erase group size to avoid erasing other partitions */
- grp_size = mmc->erase_grp_size;
- blks_start = (info.start + grp_size - 1) & ~(grp_size - 1);
- if (info.size >= grp_size)
- blks_size = (info.size - (blks_start - info.start)) &
- (~(grp_size - 1));
- else
- blks_size = 0;
- printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n",
- blks_start, blks_start + blks_size);
- blks = blk_derase(dev_desc, blks_start, blks_size);
- if (blks != blks_size) {
- error("failed erasing from device %d", dev_desc->devnum);
- fastboot_fail("failed erasing from device");
- return;
- }
- printf("........ erased " LBAFU " bytes from '%s'\n",
- blks_size * info.blksz, cmd);
- fastboot_okay("");
- }
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