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/*
* Copyright 2014 Broadcom Corporation.
* Copyright 2015 Free Electrons.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
#include <fastboot.h>
#include <image-sparse.h>
#include <linux/mtd/mtd.h>
#include <jffs2/jffs2.h>
#include <nand.h>
struct fb_nand_sparse {
struct mtd_info *mtd;
struct part_info *part;
};
__weak int board_fastboot_erase_partition_setup(char *name)
{
return 0;
}
__weak int board_fastboot_write_partition_setup(char *name)
{
return 0;
}
static int fb_nand_lookup(const char *partname,
struct mtd_info **mtd,
struct part_info **part)
{
struct mtd_device *dev;
int ret;
u8 pnum;
ret = mtdparts_init();
if (ret) {
pr_err("Cannot initialize MTD partitions\n");
fastboot_fail("cannot init mtdparts");
return ret;
}
ret = find_dev_and_part(partname, &dev, &pnum, part);
if (ret) {
pr_err("cannot find partition: '%s'", partname);
fastboot_fail("cannot find partition");
return ret;
}
if (dev->id->type != MTD_DEV_TYPE_NAND) {
pr_err("partition '%s' is not stored on a NAND device",
partname);
fastboot_fail("not a NAND device");
return -EINVAL;
}
*mtd = get_nand_dev_by_index(dev->id->num);
return 0;
}
static int _fb_nand_erase(struct mtd_info *mtd, struct part_info *part)
{
nand_erase_options_t opts;
int ret;
memset(&opts, 0, sizeof(opts));
opts.offset = part->offset;
opts.length = part->size;
opts.quiet = 1;
printf("Erasing blocks 0x%llx to 0x%llx\n",
part->offset, part->offset + part->size);
ret = nand_erase_opts(mtd, &opts);
if (ret)
return ret;
printf("........ erased 0x%llx bytes from '%s'\n",
part->size, part->name);
return 0;
}
static int _fb_nand_write(struct mtd_info *mtd, struct part_info *part,
void *buffer, unsigned int offset,
unsigned int length, size_t *written)
{
int flags = WITH_WR_VERIFY;
#ifdef CONFIG_FASTBOOT_FLASH_NAND_TRIMFFS
flags |= WITH_DROP_FFS;
#endif
return nand_write_skip_bad(mtd, offset, &length, written,
part->size - (offset - part->offset),
buffer, flags);
}
static lbaint_t fb_nand_sparse_write(struct sparse_storage *info,
lbaint_t blk, lbaint_t blkcnt, const void *buffer)
{
struct fb_nand_sparse *sparse = info->priv;
size_t written;
int ret;
ret = _fb_nand_write(sparse->mtd, sparse->part, (void *)buffer,
blk * info->blksz,
blkcnt * info->blksz, &written);
if (ret < 0) {
printf("Failed to write sparse chunk\n");
return ret;
}
/* TODO - verify that the value "written" includes the "bad-blocks" ... */
/*
* the return value must be 'blkcnt' ("good-blocks") plus the
* number of "bad-blocks" encountered within this space...
*/
return written / info->blksz;
}
static lbaint_t fb_nand_sparse_reserve(struct sparse_storage *info,
lbaint_t blk, lbaint_t blkcnt)
{
int bad_blocks = 0;
/*
* TODO - implement a function to determine the total number
* of blocks which must be used in order to reserve the specified
* number ("blkcnt") of "good-blocks", starting at "blk"...
* ( possibly something like the "check_skip_len()" function )
*/
/*
* the return value must be 'blkcnt' ("good-blocks") plus the
* number of "bad-blocks" encountered within this space...
*/
return blkcnt + bad_blocks;
}
void fb_nand_flash_write(const char *cmd, void *download_buffer,
unsigned int download_bytes)
{
struct part_info *part;
struct mtd_info *mtd = NULL;
int ret;
ret = fb_nand_lookup(cmd, &mtd, &part);
if (ret) {
pr_err("invalid NAND device");
fastboot_fail("invalid NAND device");
return;
}
ret = board_fastboot_write_partition_setup(part->name);
if (ret)
return;
if (is_sparse_image(download_buffer)) {
struct fb_nand_sparse sparse_priv;
struct sparse_storage sparse;
sparse_priv.mtd = mtd;
sparse_priv.part = part;
sparse.blksz = mtd->writesize;
sparse.start = part->offset / sparse.blksz;
sparse.size = part->size / sparse.blksz;
sparse.write = fb_nand_sparse_write;
sparse.reserve = fb_nand_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 {
printf("Flashing raw image at offset 0x%llx\n",
part->offset);
ret = _fb_nand_write(mtd, part, download_buffer, part->offset,
download_bytes, NULL);
printf("........ wrote %u bytes to '%s'\n",
download_bytes, part->name);
}
if (ret) {
fastboot_fail("error writing the image");
return;
}
fastboot_okay("");
}
void fb_nand_erase(const char *cmd)
{
struct part_info *part;
struct mtd_info *mtd = NULL;
int ret;
ret = fb_nand_lookup(cmd, &mtd, &part);
if (ret) {
pr_err("invalid NAND device");
fastboot_fail("invalid NAND device");
return;
}
ret = board_fastboot_erase_partition_setup(part->name);
if (ret)
return;
ret = _fb_nand_erase(mtd, part);
if (ret) {
pr_err("failed erasing from device %s", mtd->name);
fastboot_fail("failed erasing from device");
return;
}
fastboot_okay("");
}
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