diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/fb_mmc.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/common/fb_mmc.c b/common/fb_mmc.c index 6ea3938..513b7ab 100644 --- a/common/fb_mmc.c +++ b/common/fb_mmc.c @@ -10,6 +10,7 @@ #include <part.h> #include <aboot.h> #include <sparse_format.h> +#include <mmc.h> #ifndef CONFIG_FASTBOOT_GPT_NAME #define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME @@ -110,3 +111,58 @@ void fb_mmc_flash_write(const char *cmd, void *download_buffer, write_raw_image(dev_desc, &info, cmd, download_buffer, download_bytes); } + +void fb_mmc_erase(const char *cmd, char *response) +{ + int ret; + block_dev_desc_t *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; + } + + /* initialize the response buffer */ + response_str = response; + + dev_desc = 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 = get_partition_info_efi_by_name(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 = dev_desc->block_erase(dev_desc->dev, blks_start, blks_size); + if (blks != blks_size) { + error("failed erasing from device %d", dev_desc->dev); + fastboot_fail("failed erasing from device"); + return; + } + + printf("........ erased " LBAFU " bytes from '%s'\n", + blks_size * info.blksz, cmd); + fastboot_okay(""); +} |