yair/u-boot-tk1-som
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

usb: gadget: fastboot: Add fastboot erase

Browse Source 
Adds the fastboot erase functionality, to erase a partition
specified by name. The erase is performed based on erase group size,
to avoid erasing other partitions. The start address and the size
is aligned to the erase group size for this.

Currently only supports erasing from eMMC.

Signed-off-by: Dileep Katta <dileep.katta@linaro.org>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
This commit is contained in:
Dileep Katta
2015-02-17 18:48:23 +05:30
committed by Marek Vasut
parent 2474b7f149
commit 897923819c
4 changed files with 84 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
common/fb_mmc.c
View File

@@ -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("");
}