[RFC 27/47] mtd: nand: stm_nand_bch: write IBBT to Flash

Lee Jones
2014-03-25T08:21:32Z

Write BBT contents to the first page of a specified block, then
update the IBBT header and write it to last page of the same block.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mtd/nand/stm_nand_bch.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)

diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c
index 2d03113..76ed99b 100644
--- a/drivers/mtd/nand/stm_nand_bch.c
+++ b/drivers/mtd/nand/stm_nand_bch.c
@@ -541,6 +541,35 @@ static void bch_fill_ibbt_header(struct nandi_controller *nandi,
memcpy(ibbt_header->author, author, sizeof(author));
}

+/* Write IBBT to Flash */
+static int bch_write_bbt_data(struct nandi_controller *nandi,
+ struct nandi_bbt_info *bbt_info,
+ uint32_t block, int bak, uint8_t vers)
+{
+ uint32_t page_size = nandi->info.mtd.writesize;
+ uint32_t block_size = nandi->info.mtd.erasesize;
+ struct nand_ibbt_bch_header *ibbt_header =
+ (struct nand_ibbt_bch_header *)nandi->page_buf;
+ loff_t offs;
+
+ nandi->cached_page = -1;
+
+ /* Write BBT contents to first page of block */
+ offs = (loff_t)block << nandi->block_shift;
+ if (bch_write_page(nandi, offs, bbt_info->bbt) & NAND_STATUS_FAIL)
+ return 1;
+
+ /* Update IBBT header and write to last page of block */
+ memset(ibbt_header, 0xff, nandi->info.mtd.writesize);
+ bch_fill_ibbt_header(nandi, ibbt_header, bak, vers);
+ offs += block_size - page_size;
+ if (bch_write_page(nandi, offs, (uint8_t *)ibbt_header) &
+ NAND_STATUS_FAIL)
+ return 1;
+
+ return 0;
+}
+
/* Scan block for IBBT signature */
static int bch_find_ibbt_sig(struct nandi_controller *nandi,
uint32_t block, int *bak, uint8_t *vers,
--
1.8.3.2