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>

common/cmd_nand.c

@@ -574,7 +574,15 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 							 (u_char *)addr);
 			else
 				ret = nand_write_skip_bad(nand, off, &rwsize,
-							  (u_char *)addr);
+							  (u_char *)addr, 0);
+#ifdef CONFIG_CMD_NAND_YAFFS
+		} else if (!strcmp(s, ".yaffs")) {
+			if (read) {
+				printf("Unknown nand command suffix '%s'.\n", s);
+				return 1;
+			}
+			ret = nand_write_skip_bad(nand, off, &rwsize, (u_char *)addr, 1);
+#endif
 		} else if (!strcmp(s, ".oob")) {
 			/* out-of-band data */
 			mtd_oob_ops_t ops = {
@@ -680,6 +688,11 @@ U_BOOT_CMD(
 	"nand write - addr off|partition size\n"
 	"    read/write 'size' bytes starting at offset 'off'\n"
 	"    to/from memory address 'addr', skipping bad blocks.\n"
+#ifdef CONFIG_CMD_NAND_YAFFS
+	"nand write.yaffs - addr off|partition size\n"
+	"    write 'size' bytes starting at offset 'off' with yaffs format\n"
+	"    from memory address 'addr', skipping bad blocks.\n"
+#endif
 	"nand erase[.spread] [clean] [off [size]] - erase 'size' bytes "
 	"from offset 'off'\n"
 	"    With '.spread', erase enough for given file size, otherwise,\n"

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;

include/nand.h

@@ -115,7 +115,7 @@ typedef struct nand_erase_options nand_erase_options_t;
 int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
 		       u_char *buffer);
 int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
-			u_char *buffer);
+			u_char *buffer, int withoob);
 int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
 
 #define NAND_LOCK_STATUS_TIGHT	0x01