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mtd: mtd_blk: Support mtd_derase 

1.Support SPI Nand and SLC Nand in mtd case;
2.Only support address and length erasesize aligned case;

Change-Id: I8e76274677c153fb61616ebf320e1b86d5060439
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
This commit is contained in:
Jon Lin 2020-10-30 21:21:56 +08:00 committed by Jianhong Chen
parent edf57a9bb9
commit 338697c52f
1 changed files with 71 additions and 1 deletions
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72
drivers/mtd/mtd_blk.c
View File

@ -273,6 +273,48 @@ static __maybe_unused int mtd_map_write(struct mtd_info *mtd, loff_t offset,
return 0;
}
static __maybe_unused int mtd_map_erase(struct mtd_info *mtd, loff_t offset,
size_t length)
{
struct erase_info ei;
loff_t pos, len;
int ret;
pos = offset;
len = length;
if ((pos & mtd->erasesize_mask) || (len & mtd->erasesize_mask)) {
pr_err("Attempt to erase non block-aligned data, pos= %llx, len= %llx\n",
pos, len);
return -EINVAL;
}
while (len) {
if (mtd_block_isbad(mtd, pos) || mtd_block_isreserved(mtd, pos)) {
pr_debug("attempt to erase a bad/reserved block @%llx\n",
pos);
pos += mtd->erasesize;
continue;
}
memset(&ei, 0, sizeof(struct erase_info));
ei.addr = pos;
ei.len = mtd->erasesize;
ret = mtd_erase(mtd, &ei);
if (ret) {
pr_err("map_erase error %d while erasing %llx\n", ret,
pos);
return ret;
}
pos += mtd->erasesize;
len -= mtd->erasesize;
}
return 0;
}
char *mtd_part_parse(void)
{
char mtd_part_info_temp[MTD_SINGLE_PART_INFO_MAX_SIZE] = {0};
@ -495,7 +537,35 @@ ulong mtd_dwrite(struct udevice *udev, lbaint_t start,
ulong mtd_derase(struct udevice *udev, lbaint_t start,
lbaint_t blkcnt)
{
/* Not implemented */
struct blk_desc *desc = dev_get_uclass_platdata(udev);
#if defined(CONFIG_NAND) || defined(CONFIG_MTD_SPI_NAND) || defined(CONFIG_SPI_FLASH_MTD)
loff_t off = (loff_t)(start * 512);
size_t len = blkcnt * 512;
#endif
struct mtd_info *mtd;
int ret = 0;
if (!desc)
return ret;
mtd = desc->bdev->priv;
if (!mtd)
return 0;
pr_debug("mtd derase %s %lx %lx\n", mtd->name, start, blkcnt);
if (blkcnt == 0)
return 0;
if (desc->devnum == BLK_MTD_NAND ||
desc->devnum == BLK_MTD_SPI_NAND) {
ret = mtd_map_erase(mtd, off, len);
if (ret)
return ret;
} else {
return 0;
}
return 0;
}