[U-Boot] [PATCH 2/4] [v3] nand_util: convert nand_write_skip_bad() to flags

[Ben Gardiner]

In a future commit the behaviour of nand_write_skip_bad()
will be further extended.

Convert the only flag currently passed to the nand_write_
skip_bad() function to a bitfield of only one allocated
member. This should avoid an explosion of int's at the
end of the parameter list or the ambiguous calls like

nand_write_skip_bad(info, offset, len, buf, 0, 1, 1);
nand_write_skip_bad(info, offset, len, buf, 0, 1, 0);

Instead there will be:

nand_write_skip_bad(info, offset, len, buf, WITH_YAFFS_OOB |
			WITH_OTHER);

Signed-off-by: Ben Gardiner <bengardiner at nanometrics.ca>
Acked-by: Detlev Zundel <dzu at denx.de>

---
Changes since v2:
 * Added Detlev's Acked-by
 * removed the WITH_DEFAULTS flag -- zero is fine (Detlev Zundel)
 * fixed typo 'mmofying' to 'modifying' in comment
Changes since v1:
 * rebased to HEAD of git://git.denx.de/u-boot-nand-flash.git : ff7b4a0
   ("env_nand: zero-initialize variable nand_erase_options")
 * renamed the flag from WITH_OOB to WITH_YAFFS_OOB (Detlev Zundel)
 * introduce 'WITH_DEFAULTS' flag defined as 0 so as to convert also
   the remaining nand_write_skip_bad() call (Detlev Zundel)
---
 common/cmd_nand.c            |    3 ++-
 drivers/mtd/nand/nand_util.c |    8 ++++----
 include/nand.h               |    5 ++++-
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index 7bd37de..e7db4c9 100644
--- a/common/cmd_nand.c
+++ b/common/cmd_nand.c
@@ -581,7 +581,8 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 				printf("Unknown nand command suffix '%s'.\n", s);
 				return 1;
 			}
-			ret = nand_write_skip_bad(nand, off, &rwsize, (u_char *)addr, 1);
+			ret = nand_write_skip_bad(nand, off, &rwsize,
+						(u_char *)addr, WITH_YAFFS_OOB);
 #endif
 		} else if (!strcmp(s, ".oob")) {
 			/* out-of-band data */
diff --git a/drivers/mtd/nand/nand_util.c b/drivers/mtd/nand/nand_util.c
index 5a6f7ae..762ac53 100644
--- a/drivers/mtd/nand/nand_util.c
+++ b/drivers/mtd/nand/nand_util.c
@@ -448,11 +448,11 @@ static int check_skip_len(nand_info_t *nand, loff_t offset, size_t length)
  * @param offset	offset in flash
  * @param length	buffer length
  * @param buffer        buffer to read from
- * @param withoob	whether write with yaffs format
+ * @param flags		flags modifying the behaviour of the write to NAND
  * @return		0 in case of success
  */
 int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
-			u_char *buffer, int withoob)
+			u_char *buffer, int flags)
 {
 	int rval = 0, blocksize;
 	size_t left_to_write = *length;
@@ -460,7 +460,7 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
 	int need_skip;
 
 #ifdef CONFIG_CMD_NAND_YAFFS
-	if (withoob) {
+	if (flags & WITH_YAFFS_OOB) {
 		int pages;
 		pages = nand->erasesize / nand->writesize;
 		blocksize = (pages * nand->oobsize) + nand->erasesize;
@@ -529,7 +529,7 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
 			write_size = blocksize - block_offset;
 
 #ifdef CONFIG_CMD_NAND_YAFFS
-		if (withoob) {
+		if (flags & WITH_YAFFS_OOB) {
 			int page, pages;
 			size_t pagesize = nand->writesize;
 			size_t pagesize_oob = pagesize + nand->oobsize;
diff --git a/include/nand.h b/include/nand.h
index 7459bd0..b0a31b8 100644
--- a/include/nand.h
+++ b/include/nand.h
@@ -114,8 +114,11 @@ 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);
+
+#define WITH_YAFFS_OOB	(1 << 0) /* whether write with yaffs format */
+
 int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
-			u_char *buffer, int withoob);
+			u_char *buffer, int flags);
 int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
 
 #define NAND_LOCK_STATUS_TIGHT	0x01
-- 
1.7.4.1