NAND: add the ability to directly write yaffs image

This patch add addition suffix to nand write to give the uboot
the power to directly burn the yaffs image to nand.

Signed-off-by: Lei Wen <leiwen@marvell.com>

1 files changed, 55 insertions, 8 deletions

diff --git a/drivers/mtd/nand/nand_util.c b/drivers/mtd/nand/nand_util.c
index 22c7411..8b4f738 100644
--- a/drivers/mtd/nand/nand_util.c
+++ b/drivers/mtd/nand/nand_util.c
@@ -447,17 +447,34 @@ static int check_skip_len(nand_info_t *nand, loff_t offset, size_t length)
  * @param nand  	NAND device
  * @param offset	offset in flash
  * @param length	buffer length
- * @param buf           buffer to read from
+ * @param buffer        buffer to read from
+ * @param withoob	whether write with yaffs format
  * @return		0 in case of success
  */
 int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
-			u_char *buffer)
+			u_char *buffer, int withoob)
 {
-	int rval;
+	int rval = 0, blocksize;
 	size_t left_to_write = *length;
 	u_char *p_buffer = buffer;
 	int need_skip;
 
+#ifdef CONFIG_CMD_NAND_YAFFS
+	if (withoob) {
+		int pages;
+		pages = nand->erasesize / nand->writesize;
+		blocksize = (pages * nand->oobsize) + nand->erasesize;
+		if (*length % (nand->writesize + nand->oobsize)) {
+			printf ("Attempt to write incomplete page"
+				" in yaffs mode\n");
+			return -EINVAL;
+		}
+	} else
+#endif
+	{
+		blocksize = nand->erasesize;
+	}
+
 	/*
 	 * nand_write() handles unaligned, partial page writes.
 	 *
@@ -506,12 +523,44 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
 			continue;
 		}
 
-		if (left_to_write < (nand->erasesize - block_offset))
+		if (left_to_write < (blocksize - block_offset))
 			write_size = left_to_write;
 		else
-			write_size = nand->erasesize - block_offset;
+			write_size = blocksize - block_offset;
+
+#ifdef CONFIG_CMD_NAND_YAFFS
+		if (withoob) {
+			int page, pages;
+			size_t pagesize = nand->writesize;
+			size_t pagesize_oob = pagesize + nand->oobsize;
+			struct mtd_oob_ops ops;
+
+			ops.len = pagesize;
+			ops.ooblen = nand->oobsize;
+			ops.mode = MTD_OOB_AUTO;
+			ops.ooboffs = 0;
+
+			pages = write_size / pagesize_oob;
+			for (page = 0; page < pages; page++) {
+				ops.datbuf = p_buffer;
+				ops.oobbuf = ops.datbuf + pagesize;
+
+				rval = nand->write_oob(nand, offset, &ops);
+				if (!rval)
+					break;
+
+				offset += pagesize;
+				p_buffer += pagesize_oob;
+			}
+		}
+		else
+#endif
+		{
+			rval = nand_write (nand, offset, &write_size, p_buffer);
+			offset += write_size;
+			p_buffer += write_size;
+		}
 
-		rval = nand_write (nand, offset, &write_size, p_buffer);
 		if (rval != 0) {
 			printf ("NAND write to offset %llx failed %d\n",
 				offset, rval);
@@ -520,8 +569,6 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
 		}
 
 		left_to_write -= write_size;
-		offset        += write_size;
-		p_buffer      += write_size;
 	}
 
 	return 0;