Commit 735717d1 authored by Ladislav Michl's avatar Ladislav Michl Committed by Tom Rini

onenand_spl_simple: Add a simple OneNAND read function

Signed-off-by: default avatarLadislav Michl <ladis@linux-mips.org>
parent e1a89e93
......@@ -93,6 +93,54 @@ static int onenand_spl_read_page(uint32_t block, uint32_t page, uint32_t *buf,
return 0;
}
#ifdef CONFIG_SPL_UBI
/* Temporary storage for non page aligned and non page sized reads. */
static u8 scratch_buf[PAGE_4K];
/**
* onenand_spl_read_block - Read data from physical eraseblock into a buffer
* @block: Number of the physical eraseblock
* @offset: Data offset from the start of @peb
* @len: Data size to read
* @dst: Address of the destination buffer
*
* Notes:
* @offset + @len are not allowed to be larger than a physical
* erase block. No sanity check done for simplicity reasons.
*/
int onenand_spl_read_block(int block, int offset, int len, void *dst)
{
int page, read, psize;
psize = onenand_spl_get_geometry();
/* Calculate the page number */
page = offset / psize;
/* Offset to the start of a flash page */
offset = offset % psize;
while (len) {
/*
* Non page aligned reads go to the scratch buffer.
* Page aligned reads go directly to the destination.
*/
if (offset || len < psize) {
onenand_spl_read_page(block, page,
(uint32_t *)scratch_buf, psize);
read = min(len, psize - offset);
memcpy(dst, scratch_buf + offset, read);
offset = 0;
} else {
onenand_spl_read_page(block, page, dst, psize);
read = psize;
}
page++;
len -= read;
dst += read;
}
return 0;
}
#endif
void onenand_spl_load_image(uint32_t offs, uint32_t size, void *dst)
{
uint32_t *addr = (uint32_t *)dst;
......
......@@ -49,6 +49,7 @@ extern int flexonenand_set_boundary(struct mtd_info *mtd, int die,
int boundary, int lock);
/* SPL */
int onenand_spl_read_block(int block, int offset, int len, void *dst);
void onenand_spl_load_image(uint32_t offs, uint32_t size, void *dst);
#endif /* __UBOOT_ONENAND_H */
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment