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/*
* Copyright 2014 Broadcom Corporation.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
#include <blk.h>
#include <errno.h>
#include <fastboot.h>
#include <fb_mmc.h>
#include <image-sparse.h>
#include <part.h>
#include <sparse_format.h>
#include <mmc.h>
#include <div64.h>
#ifndef CONFIG_FASTBOOT_GPT_NAME
#define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME
#endif
static char *response_str;
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_efi_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_efi_by_name(dev_desc,
aliased_part_name, info);
}
return ret;
}
static int fb_mmc_sparse_write(struct sparse_storage *storage,
void *priv,
unsigned int offset,
unsigned int size,
char *data)
{
struct fb_mmc_sparse *sparse = priv;
struct blk_desc *dev_desc = sparse->dev_desc;
int ret;
ret = blk_dwrite(dev_desc, offset, size, data);
if (!ret)
return -EIO;
return ret;
}
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(response_str, "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(response_str, "failed writing to device");
return;
}
printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
part_name);
fastboot_okay(response_str, "");
}
void fb_mmc_flash_write(const char *cmd, void *download_buffer,
unsigned int download_bytes, char *response)
{
struct blk_desc *dev_desc;
disk_partition_t info;
/* initialize the response buffer */
response_str = response;
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(response_str, "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(response_str, "invalid GPT partition");
return;
}
if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
printf("%s: writing GPT partitions failed\n", __func__);
fastboot_fail(response_str,
"writing GPT partitions failed");
return;
}
printf("........ success\n");
fastboot_okay(response_str, "");
return;
} else if (part_get_info_efi_by_name_or_alias(dev_desc, cmd, &info)) {
error("cannot find partition: '%s'\n", cmd);
fastboot_fail(response_str, "cannot find partition");
return;
}
if (is_sparse_image(download_buffer)) {
struct fb_mmc_sparse sparse_priv;
sparse_storage_t sparse;
sparse_priv.dev_desc = dev_desc;
sparse.block_sz = info.blksz;
sparse.start = info.start;
sparse.size = info.size;
sparse.name = cmd;
sparse.write = fb_mmc_sparse_write;
printf("Flashing sparse image at offset " LBAFU "\n",
info.start);
store_sparse_image(&sparse, &sparse_priv, download_buffer);
} else {
write_raw_image(dev_desc, &info, cmd, download_buffer,
download_bytes);
}
fastboot_okay(response_str, "");
}
void fb_mmc_erase(const char *cmd, char *response)
{
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(response_str, "invalid mmc device");
return;
}
/* initialize the response buffer */
response_str = response;
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(response_str, "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(response_str, "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, blks_start, blks_size);
if (blks != blks_size) {
error("failed erasing from device %d", dev_desc->devnum);
fastboot_fail(response_str, "failed erasing from device");
return;
}
printf("........ erased " LBAFU " bytes from '%s'\n",
blks_size * info.blksz, cmd);
fastboot_okay(response_str, "");
}
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