On Wed, Aug 24, 2011 at 10:56:15AM +0200, Teresa Gámez wrote:
> Some NOR flash chips have commands with length greater than the maximum
> value size of uchar.
>
> Based on an U-Boot Patch by Vasiliy Leoenenko <vasiliy.leonenko@xxxxxxx>
>
> Only tested with little endian on an intel cfi_flash.
>
> Signed-off-by: Teresa Gámez <t.gamez@xxxxxxxxx>
> ---
> drivers/nor/cfi_flash.c | 38 +++++++++++++++++++++++++++++---------
> drivers/nor/cfi_flash.h | 11 +++++++----
> drivers/nor/cfi_flash_amd.c | 8 ++++----
> drivers/nor/cfi_flash_intel.c | 2 +-
> 4 files changed, 41 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/nor/cfi_flash.c b/drivers/nor/cfi_flash.c
> index 461b0e6..489c15d 100644
> --- a/drivers/nor/cfi_flash.c
> +++ b/drivers/nor/cfi_flash.c
> @@ -820,20 +820,38 @@ int flash_generic_status_check (struct flash_info *info, flash_sect_t sector,
> /*
> * make a proper sized command based on the port and chip widths
> */
> -void flash_make_cmd(struct flash_info *info, u8 cmd, cfiword_t *cmdbuf)
> +void flash_make_cmd(struct flash_info *info, u32 cmd, cfiword_t *cmdbuf)
> {
> - cfiword_t result = 0;
> - int i = info->portwidth / info->chipwidth;
> + int i;
> + int cp_offset;
> + int cword_offset;
> + uchar val;
> + uchar *cp;
> +#if __BYTE_ORDER == __LITTLE_ENDIAN
> + u32 cmd_le = cpu_to_le32(cmd);
> +#endif
This looks suspicious. With little endian byte order cpu_to_le32 is a
noop.
Sascha
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