[U-Boot,2/5] nand_util: convert nand_write_skip_bad() to flags

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_OOB |
			WITH_OTHER);

Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
---
 common/cmd_nand.c            |    3 ++-
 drivers/mtd/nand/nand_util.c |    8 ++++----
 include/nand.h               |    5 ++++-
 3 files changed, 10 insertions(+), 6 deletions(-)

Hi Ben,

> 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_OOB |
> 			WITH_OTHER);
>
> Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
> ---
>  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..69b2acc 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_OOB);
>  #endif
>  		} else if (!strcmp(s, ".oob")) {
>  			/* out-of-band data */

I see an occurrence of nand_write_skip_bad just above this if block.
Please replace this also.

> diff --git a/drivers/mtd/nand/nand_util.c b/drivers/mtd/nand/nand_util.c
> index 5a6f7ae..2bd8758 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 mmofying 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_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_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..628317a 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_OOB (1 << 0) /* whether write with yaffs format */
> +

If this flag is really only relevant for YAFFS, then please include this
in its name, i.e. rename it to "WITH_YAFFS_OOB".

>  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

Cheers
  Detlev