Needed for redundant environment for example.

Signed-off-by: Stefan Roese sr@denx.de Cc: Amit Virdi amit.virdi@st.com Cc: Vipin Kumar vipin.kumar@st.com --- drivers/mtd/st_smi.c | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/st_smi.c b/drivers/mtd/st_smi.c index 3f689e7..f950e11 100644 --- a/drivers/mtd/st_smi.c +++ b/drivers/mtd/st_smi.c @@ -362,7 +362,7 @@ static int smi_sector_erase(flash_info_t *info, unsigned int sector) * smi_write - Write to SMI flash * @src_addr: source buffer * @dst_addr: destination buffer - * @length: length to write in words + * @length: length to write in bytes * @bank: bank base address * * Write to SMI flash @@ -370,7 +370,10 @@ static int smi_sector_erase(flash_info_t *info, unsigned int sector) static int smi_write(unsigned int *src_addr, unsigned int *dst_addr, unsigned int length, ulong bank_addr) { + u8 *src_addr8 = (u8 *)src_addr; + u8 *dst_addr8 = (u8 *)dst_addr; int banknum; + int i;

switch (bank_addr) { case SMIBANK0_BASE: @@ -399,7 +402,7 @@ static int smi_write(unsigned int *src_addr, unsigned int *dst_addr, return -EIO;

/* Perform the write command */ - while (length--) { + for (i = 0; i < length; i += 4) { if (((ulong) (dst_addr) % SFLASH_PAGE_SIZE) == 0) { if (smi_wait_till_ready(banknum, CONFIG_SYS_FLASH_WRITE_TOUT)) @@ -409,7 +412,18 @@ static int smi_write(unsigned int *src_addr, unsigned int *dst_addr, return -EIO; }

- *dst_addr++ = *src_addr++; + if (length < 4) { + int k; + + /* + * Handle special case, where length < 4 (redundant env) + */ + for (k = 0; k < length; k++) + *dst_addr8++ = *src_addr8++; + } else { + /* Normal 32bit write */ + *dst_addr++ = *src_addr++; + }

if ((readl(&smicntl->smi_sr) & (ERF1 | ERF2))) return -EIO; @@ -435,7 +449,7 @@ static int smi_write(unsigned int *src_addr, unsigned int *dst_addr, int write_buff(flash_info_t *info, uchar *src, ulong dest_addr, ulong length) { return smi_write((unsigned int *)src, (unsigned int *)dest_addr, - (length + 3) / 4, info->start[0]); + length, info->start[0]); }

/*