mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 11:00:15 +00:00
bc6413bdd9
With vendor boot image introduced in version 3 and 4 of boot image header, boot information is located in both boot image and vendor boot image. Flashing zImage is not supported for version 3 and 4 since this requires updating vendor boot image and/or generating a new image. Print an error message when the boot image header version is greater than 2. Signed-off-by: Safae Ouajih <souajih@baylibre.com> Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com> Tested-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
713 lines
19 KiB
C
713 lines
19 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2014 Broadcom Corporation.
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*/
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#include <config.h>
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#include <common.h>
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#include <blk.h>
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#include <env.h>
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#include <fastboot.h>
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#include <fastboot-internal.h>
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#include <fb_mmc.h>
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#include <image-sparse.h>
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#include <image.h>
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#include <log.h>
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#include <part.h>
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#include <mmc.h>
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#include <div64.h>
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#include <linux/compat.h>
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#include <android_image.h>
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#define FASTBOOT_MAX_BLK_WRITE 16384
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#define BOOT_PARTITION_NAME "boot"
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struct fb_mmc_sparse {
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struct blk_desc *dev_desc;
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};
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static int raw_part_get_info_by_name(struct blk_desc *dev_desc,
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const char *name,
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struct disk_partition *info)
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{
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/* strlen("fastboot_raw_partition_") + PART_NAME_LEN + 1 */
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char env_desc_name[23 + PART_NAME_LEN + 1];
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char *raw_part_desc;
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const char *argv[2];
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const char **parg = argv;
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/* check for raw partition descriptor */
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strcpy(env_desc_name, "fastboot_raw_partition_");
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strlcat(env_desc_name, name, sizeof(env_desc_name));
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raw_part_desc = strdup(env_get(env_desc_name));
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if (raw_part_desc == NULL)
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return -ENODEV;
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/*
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* parse partition descriptor
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*
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* <lba_start> <lba_size> [mmcpart <num>]
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*/
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for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) {
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*parg = strsep(&raw_part_desc, " ");
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if (*parg == NULL) {
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pr_err("Invalid number of arguments.\n");
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return -ENODEV;
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}
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}
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info->start = simple_strtoul(argv[0], NULL, 0);
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info->size = simple_strtoul(argv[1], NULL, 0);
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info->blksz = dev_desc->blksz;
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strlcpy((char *)info->name, name, PART_NAME_LEN);
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if (raw_part_desc) {
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if (strcmp(strsep(&raw_part_desc, " "), "mmcpart") == 0) {
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ulong mmcpart = simple_strtoul(raw_part_desc, NULL, 0);
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int ret = blk_dselect_hwpart(dev_desc, mmcpart);
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if (ret)
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return ret;
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}
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}
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return 0;
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}
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static int do_get_part_info(struct blk_desc **dev_desc, const char *name,
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struct disk_partition *info)
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{
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int ret;
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/* First try partition names on the default device */
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*dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
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if (*dev_desc) {
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ret = part_get_info_by_name(*dev_desc, name, info);
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if (ret >= 0)
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return ret;
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/* Then try raw partitions */
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ret = raw_part_get_info_by_name(*dev_desc, name, info);
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if (ret >= 0)
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return ret;
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}
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/* Then try dev.hwpart:part */
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ret = part_get_info_by_dev_and_name_or_num("mmc", name, dev_desc,
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info, true);
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return ret;
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}
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static int part_get_info_by_name_or_alias(struct blk_desc **dev_desc,
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const char *name,
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struct disk_partition *info)
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{
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/* strlen("fastboot_partition_alias_") + PART_NAME_LEN + 1 */
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char env_alias_name[25 + PART_NAME_LEN + 1];
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char *aliased_part_name;
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/* check for alias */
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strlcpy(env_alias_name, "fastboot_partition_alias_", sizeof(env_alias_name));
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strlcat(env_alias_name, name, sizeof(env_alias_name));
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aliased_part_name = env_get(env_alias_name);
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if (aliased_part_name)
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name = aliased_part_name;
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return do_get_part_info(dev_desc, name, info);
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}
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/**
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* fb_mmc_blk_write() - Write/erase MMC in chunks of FASTBOOT_MAX_BLK_WRITE
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*
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* @block_dev: Pointer to block device
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* @start: First block to write/erase
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* @blkcnt: Count of blocks
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* @buffer: Pointer to data buffer for write or NULL for erase
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*/
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static lbaint_t fb_mmc_blk_write(struct blk_desc *block_dev, lbaint_t start,
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lbaint_t blkcnt, const void *buffer)
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{
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lbaint_t blk = start;
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lbaint_t blks_written;
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lbaint_t cur_blkcnt;
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lbaint_t blks = 0;
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int i;
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for (i = 0; i < blkcnt; i += FASTBOOT_MAX_BLK_WRITE) {
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cur_blkcnt = min((int)blkcnt - i, FASTBOOT_MAX_BLK_WRITE);
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if (buffer) {
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if (fastboot_progress_callback)
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fastboot_progress_callback("writing");
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blks_written = blk_dwrite(block_dev, blk, cur_blkcnt,
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buffer + (i * block_dev->blksz));
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} else {
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if (fastboot_progress_callback)
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fastboot_progress_callback("erasing");
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blks_written = blk_derase(block_dev, blk, cur_blkcnt);
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}
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blk += blks_written;
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blks += blks_written;
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}
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return blks;
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}
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static lbaint_t fb_mmc_sparse_write(struct sparse_storage *info,
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lbaint_t blk, lbaint_t blkcnt, const void *buffer)
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{
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struct fb_mmc_sparse *sparse = info->priv;
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struct blk_desc *dev_desc = sparse->dev_desc;
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return fb_mmc_blk_write(dev_desc, blk, blkcnt, buffer);
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}
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static lbaint_t fb_mmc_sparse_reserve(struct sparse_storage *info,
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lbaint_t blk, lbaint_t blkcnt)
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{
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return blkcnt;
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}
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static void write_raw_image(struct blk_desc *dev_desc,
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struct disk_partition *info, const char *part_name,
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void *buffer, u32 download_bytes, char *response)
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{
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lbaint_t blkcnt;
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lbaint_t blks;
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/* determine number of blocks to write */
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blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
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blkcnt = lldiv(blkcnt, info->blksz);
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if (blkcnt > info->size) {
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pr_err("too large for partition: '%s'\n", part_name);
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fastboot_fail("too large for partition", response);
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return;
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}
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puts("Flashing Raw Image\n");
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blks = fb_mmc_blk_write(dev_desc, info->start, blkcnt, buffer);
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if (blks != blkcnt) {
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pr_err("failed writing to device %d\n", dev_desc->devnum);
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fastboot_fail("failed writing to device", response);
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return;
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}
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printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
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part_name);
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fastboot_okay(NULL, response);
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}
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#if defined(CONFIG_FASTBOOT_MMC_BOOT_SUPPORT) || \
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defined(CONFIG_FASTBOOT_MMC_USER_SUPPORT)
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static int fb_mmc_erase_mmc_hwpart(struct blk_desc *dev_desc)
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{
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lbaint_t blks;
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debug("Start Erasing mmc hwpart[%u]...\n", dev_desc->hwpart);
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blks = fb_mmc_blk_write(dev_desc, 0, dev_desc->lba, NULL);
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if (blks != dev_desc->lba) {
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pr_err("Failed to erase mmc hwpart[%u]\n", dev_desc->hwpart);
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return 1;
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}
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printf("........ erased %lu bytes from mmc hwpart[%u]\n",
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dev_desc->lba * dev_desc->blksz, dev_desc->hwpart);
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return 0;
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}
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#endif
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#ifdef CONFIG_FASTBOOT_MMC_BOOT_SUPPORT
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static void fb_mmc_boot_ops(struct blk_desc *dev_desc, void *buffer,
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int hwpart, u32 buff_sz, char *response)
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{
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lbaint_t blkcnt;
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lbaint_t blks;
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unsigned long blksz;
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// To operate on EMMC_BOOT1/2 (mmc0boot0/1) we first change the hwpart
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if (blk_dselect_hwpart(dev_desc, hwpart)) {
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pr_err("Failed to select hwpart\n");
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fastboot_fail("Failed to select hwpart", response);
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return;
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}
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if (buffer) { /* flash */
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/* determine number of blocks to write */
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blksz = dev_desc->blksz;
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blkcnt = ((buff_sz + (blksz - 1)) & ~(blksz - 1));
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blkcnt = lldiv(blkcnt, blksz);
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if (blkcnt > dev_desc->lba) {
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pr_err("Image size too large\n");
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fastboot_fail("Image size too large", response);
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return;
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}
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debug("Start Flashing Image to EMMC_BOOT%d...\n", hwpart);
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blks = fb_mmc_blk_write(dev_desc, 0, blkcnt, buffer);
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if (blks != blkcnt) {
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pr_err("Failed to write EMMC_BOOT%d\n", hwpart);
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fastboot_fail("Failed to write EMMC_BOOT part",
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response);
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return;
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}
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printf("........ wrote %lu bytes to EMMC_BOOT%d\n",
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blkcnt * blksz, hwpart);
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} else { /* erase */
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if (fb_mmc_erase_mmc_hwpart(dev_desc)) {
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pr_err("Failed to erase EMMC_BOOT%d\n", hwpart);
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fastboot_fail("Failed to erase EMMC_BOOT part",
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response);
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return;
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}
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}
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fastboot_okay(NULL, response);
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}
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#endif
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#ifdef CONFIG_ANDROID_BOOT_IMAGE
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/**
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* Read Android boot image header from boot partition.
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*
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* @param[in] dev_desc MMC device descriptor
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* @param[in] info Boot partition info
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* @param[out] hdr Where to store read boot image header
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*
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* Return: Boot image header sectors count or 0 on error
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*/
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static lbaint_t fb_mmc_get_boot_header(struct blk_desc *dev_desc,
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struct disk_partition *info,
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struct andr_boot_img_hdr_v0 *hdr,
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char *response)
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{
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ulong sector_size; /* boot partition sector size */
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lbaint_t hdr_sectors; /* boot image header sectors count */
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int res;
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/* Calculate boot image sectors count */
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sector_size = info->blksz;
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hdr_sectors = DIV_ROUND_UP(sizeof(struct andr_boot_img_hdr_v0), sector_size);
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if (hdr_sectors == 0) {
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pr_err("invalid number of boot sectors: 0\n");
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fastboot_fail("invalid number of boot sectors: 0", response);
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return 0;
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}
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/* Read the boot image header */
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res = blk_dread(dev_desc, info->start, hdr_sectors, (void *)hdr);
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if (res != hdr_sectors) {
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pr_err("cannot read header from boot partition\n");
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fastboot_fail("cannot read header from boot partition",
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response);
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return 0;
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}
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/* Check boot header magic string */
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if (!is_android_boot_image_header(hdr)) {
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pr_err("bad boot image magic\n");
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fastboot_fail("boot partition not initialized", response);
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return 0;
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}
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return hdr_sectors;
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}
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/**
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* Write downloaded zImage to boot partition and repack it properly.
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*
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* @param dev_desc MMC device descriptor
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* @param download_buffer Address to fastboot buffer with zImage in it
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* @param download_bytes Size of fastboot buffer, in bytes
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*
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* Return: 0 on success or -1 on error
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*/
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static int fb_mmc_update_zimage(struct blk_desc *dev_desc,
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void *download_buffer,
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u32 download_bytes,
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char *response)
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{
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uintptr_t hdr_addr; /* boot image header address */
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struct andr_boot_img_hdr_v0 *hdr; /* boot image header */
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lbaint_t hdr_sectors; /* boot image header sectors */
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u8 *ramdisk_buffer;
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u32 ramdisk_sector_start;
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u32 ramdisk_sectors;
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u32 kernel_sector_start;
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u32 kernel_sectors;
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u32 sectors_per_page;
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struct disk_partition info;
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int res;
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puts("Flashing zImage\n");
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/* Get boot partition info */
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res = part_get_info_by_name(dev_desc, BOOT_PARTITION_NAME, &info);
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if (res < 0) {
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pr_err("cannot find boot partition\n");
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fastboot_fail("cannot find boot partition", response);
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return -1;
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}
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/* Put boot image header in fastboot buffer after downloaded zImage */
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hdr_addr = (uintptr_t)download_buffer + ALIGN(download_bytes, PAGE_SIZE);
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hdr = (struct andr_boot_img_hdr_v0 *)hdr_addr;
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/* Read boot image header */
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hdr_sectors = fb_mmc_get_boot_header(dev_desc, &info, hdr, response);
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if (hdr_sectors == 0) {
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pr_err("unable to read boot image header\n");
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fastboot_fail("unable to read boot image header", response);
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return -1;
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}
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/* Check if boot image header version is 2 or less */
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if (hdr->header_version > 2) {
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pr_err("zImage flashing supported only for boot images v2 and less\n");
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fastboot_fail("zImage flashing supported only for boot images v2 and less",
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response);
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return -EOPNOTSUPP;
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}
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/* Check if boot image has second stage in it (we don't support it) */
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if (hdr->second_size > 0) {
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pr_err("moving second stage is not supported yet\n");
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fastboot_fail("moving second stage is not supported yet",
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response);
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return -1;
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}
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/* Extract ramdisk location */
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sectors_per_page = hdr->page_size / info.blksz;
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ramdisk_sector_start = info.start + sectors_per_page;
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ramdisk_sector_start += DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) *
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sectors_per_page;
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ramdisk_sectors = DIV_ROUND_UP(hdr->ramdisk_size, hdr->page_size) *
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sectors_per_page;
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/* Read ramdisk and put it in fastboot buffer after boot image header */
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ramdisk_buffer = (u8 *)hdr + (hdr_sectors * info.blksz);
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res = blk_dread(dev_desc, ramdisk_sector_start, ramdisk_sectors,
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ramdisk_buffer);
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if (res != ramdisk_sectors) {
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pr_err("cannot read ramdisk from boot partition\n");
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fastboot_fail("cannot read ramdisk from boot partition",
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response);
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return -1;
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}
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/* Write new kernel size to boot image header */
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hdr->kernel_size = download_bytes;
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res = blk_dwrite(dev_desc, info.start, hdr_sectors, (void *)hdr);
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if (res == 0) {
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pr_err("cannot writeback boot image header\n");
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fastboot_fail("cannot write back boot image header", response);
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return -1;
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}
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/* Write the new downloaded kernel */
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kernel_sector_start = info.start + sectors_per_page;
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kernel_sectors = DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) *
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sectors_per_page;
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res = blk_dwrite(dev_desc, kernel_sector_start, kernel_sectors,
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download_buffer);
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if (res == 0) {
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pr_err("cannot write new kernel\n");
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fastboot_fail("cannot write new kernel", response);
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return -1;
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}
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/* Write the saved ramdisk back */
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ramdisk_sector_start = info.start + sectors_per_page;
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ramdisk_sector_start += DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) *
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sectors_per_page;
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res = blk_dwrite(dev_desc, ramdisk_sector_start, ramdisk_sectors,
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ramdisk_buffer);
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if (res == 0) {
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pr_err("cannot write back original ramdisk\n");
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fastboot_fail("cannot write back original ramdisk", response);
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return -1;
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}
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puts("........ zImage was updated in boot partition\n");
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fastboot_okay(NULL, response);
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return 0;
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}
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#endif
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/**
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* fastboot_mmc_get_part_info() - Lookup eMMC partion by name
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*
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* @part_name: Named partition to lookup
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* @dev_desc: Pointer to returned blk_desc pointer
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* @part_info: Pointer to returned struct disk_partition
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* @response: Pointer to fastboot response buffer
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*/
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int fastboot_mmc_get_part_info(const char *part_name,
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struct blk_desc **dev_desc,
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struct disk_partition *part_info, char *response)
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{
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int ret;
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if (!part_name || !strcmp(part_name, "")) {
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fastboot_fail("partition not given", response);
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return -ENOENT;
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}
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ret = part_get_info_by_name_or_alias(dev_desc, part_name, part_info);
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if (ret < 0) {
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switch (ret) {
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case -ENOSYS:
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case -EINVAL:
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fastboot_fail("invalid partition or device", response);
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break;
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case -ENODEV:
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fastboot_fail("no such device", response);
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break;
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case -ENOENT:
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fastboot_fail("no such partition", response);
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break;
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case -EPROTONOSUPPORT:
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fastboot_fail("unknown partition table type", response);
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break;
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default:
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fastboot_fail("unanticipated error", response);
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break;
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|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct blk_desc *fastboot_mmc_get_dev(char *response)
|
|
{
|
|
struct blk_desc *ret = blk_get_dev("mmc",
|
|
CONFIG_FASTBOOT_FLASH_MMC_DEV);
|
|
|
|
if (!ret || ret->type == DEV_TYPE_UNKNOWN) {
|
|
pr_err("invalid mmc device\n");
|
|
fastboot_fail("invalid mmc device", response);
|
|
return NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* fastboot_mmc_flash_write() - Write image to eMMC for fastboot
|
|
*
|
|
* @cmd: Named partition to write image to
|
|
* @download_buffer: Pointer to image data
|
|
* @download_bytes: Size of image data
|
|
* @response: Pointer to fastboot response buffer
|
|
*/
|
|
void fastboot_mmc_flash_write(const char *cmd, void *download_buffer,
|
|
u32 download_bytes, char *response)
|
|
{
|
|
struct blk_desc *dev_desc;
|
|
struct disk_partition info = {0};
|
|
|
|
#ifdef CONFIG_FASTBOOT_MMC_BOOT_SUPPORT
|
|
if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT1_NAME) == 0) {
|
|
dev_desc = fastboot_mmc_get_dev(response);
|
|
if (dev_desc)
|
|
fb_mmc_boot_ops(dev_desc, download_buffer, 1,
|
|
download_bytes, response);
|
|
return;
|
|
}
|
|
if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT2_NAME) == 0) {
|
|
dev_desc = fastboot_mmc_get_dev(response);
|
|
if (dev_desc)
|
|
fb_mmc_boot_ops(dev_desc, download_buffer, 2,
|
|
download_bytes, response);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
#if CONFIG_IS_ENABLED(EFI_PARTITION)
|
|
if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
|
|
dev_desc = fastboot_mmc_get_dev(response);
|
|
if (!dev_desc)
|
|
return;
|
|
|
|
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", response);
|
|
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",
|
|
response);
|
|
return;
|
|
}
|
|
part_init(dev_desc);
|
|
printf("........ success\n");
|
|
fastboot_okay(NULL, response);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
#if CONFIG_IS_ENABLED(DOS_PARTITION)
|
|
if (strcmp(cmd, CONFIG_FASTBOOT_MBR_NAME) == 0) {
|
|
dev_desc = fastboot_mmc_get_dev(response);
|
|
if (!dev_desc)
|
|
return;
|
|
|
|
printf("%s: updating MBR\n", __func__);
|
|
if (is_valid_dos_buf(download_buffer)) {
|
|
printf("%s: invalid MBR - refusing to write to flash\n",
|
|
__func__);
|
|
fastboot_fail("invalid MBR partition", response);
|
|
return;
|
|
}
|
|
if (write_mbr_sector(dev_desc, download_buffer)) {
|
|
printf("%s: writing MBR partition failed\n", __func__);
|
|
fastboot_fail("writing MBR partition failed",
|
|
response);
|
|
return;
|
|
}
|
|
part_init(dev_desc);
|
|
printf("........ success\n");
|
|
fastboot_okay(NULL, response);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_ANDROID_BOOT_IMAGE
|
|
if (strncasecmp(cmd, "zimage", 6) == 0) {
|
|
dev_desc = fastboot_mmc_get_dev(response);
|
|
if (dev_desc)
|
|
fb_mmc_update_zimage(dev_desc, download_buffer,
|
|
download_bytes, response);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
#if IS_ENABLED(CONFIG_FASTBOOT_MMC_USER_SUPPORT)
|
|
if (strcmp(cmd, CONFIG_FASTBOOT_MMC_USER_NAME) == 0) {
|
|
dev_desc = fastboot_mmc_get_dev(response);
|
|
if (!dev_desc)
|
|
return;
|
|
|
|
strlcpy((char *)&info.name, cmd, sizeof(info.name));
|
|
info.size = dev_desc->lba;
|
|
info.blksz = dev_desc->blksz;
|
|
}
|
|
#endif
|
|
|
|
if (!info.name[0] &&
|
|
fastboot_mmc_get_part_info(cmd, &dev_desc, &info, response) < 0)
|
|
return;
|
|
|
|
if (is_sparse_image(download_buffer)) {
|
|
struct fb_mmc_sparse sparse_priv;
|
|
struct sparse_storage sparse;
|
|
int err;
|
|
|
|
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;
|
|
sparse.mssg = fastboot_fail;
|
|
|
|
printf("Flashing sparse image at offset " LBAFU "\n",
|
|
sparse.start);
|
|
|
|
sparse.priv = &sparse_priv;
|
|
err = write_sparse_image(&sparse, cmd, download_buffer,
|
|
response);
|
|
if (!err)
|
|
fastboot_okay(NULL, response);
|
|
} else {
|
|
write_raw_image(dev_desc, &info, cmd, download_buffer,
|
|
download_bytes, response);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* fastboot_mmc_flash_erase() - Erase eMMC for fastboot
|
|
*
|
|
* @cmd: Named partition to erase
|
|
* @response: Pointer to fastboot response buffer
|
|
*/
|
|
void fastboot_mmc_erase(const char *cmd, char *response)
|
|
{
|
|
struct blk_desc *dev_desc;
|
|
struct disk_partition info;
|
|
lbaint_t blks, blks_start, blks_size, grp_size;
|
|
struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
|
|
|
|
#ifdef CONFIG_FASTBOOT_MMC_BOOT_SUPPORT
|
|
if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT1_NAME) == 0) {
|
|
/* erase EMMC boot1 */
|
|
dev_desc = fastboot_mmc_get_dev(response);
|
|
if (dev_desc)
|
|
fb_mmc_boot_ops(dev_desc, NULL, 1, 0, response);
|
|
return;
|
|
}
|
|
if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT2_NAME) == 0) {
|
|
/* erase EMMC boot2 */
|
|
dev_desc = fastboot_mmc_get_dev(response);
|
|
if (dev_desc)
|
|
fb_mmc_boot_ops(dev_desc, NULL, 2, 0, response);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_FASTBOOT_MMC_USER_SUPPORT
|
|
if (strcmp(cmd, CONFIG_FASTBOOT_MMC_USER_NAME) == 0) {
|
|
/* erase EMMC userdata */
|
|
dev_desc = fastboot_mmc_get_dev(response);
|
|
if (!dev_desc)
|
|
return;
|
|
|
|
if (fb_mmc_erase_mmc_hwpart(dev_desc))
|
|
fastboot_fail("Failed to erase EMMC_USER", response);
|
|
else
|
|
fastboot_okay(NULL, response);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
if (fastboot_mmc_get_part_info(cmd, &dev_desc, &info, response) < 0)
|
|
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 = fb_mmc_blk_write(dev_desc, blks_start, blks_size, NULL);
|
|
|
|
if (blks != blks_size) {
|
|
pr_err("failed erasing from device %d\n", dev_desc->devnum);
|
|
fastboot_fail("failed erasing from device", response);
|
|
return;
|
|
}
|
|
|
|
printf("........ erased " LBAFU " bytes from '%s'\n",
|
|
blks_size * info.blksz, cmd);
|
|
fastboot_okay(NULL, response);
|
|
}
|