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| author | Stefan Roese <sr@denx.de> | 2012-02-02 13:25:45 +0100 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-07-07 14:07:44 +0200 |
| commit | 185b3b76a6a2e4eacb9e74a633950231e6787384 (patch) | |
| tree | 2ee1976babc42418a42908ce3aa3d528033a32c3 | |
| parent | 496ba48f5ec60187d9ff7e4298e3d37677d74530 (diff) | |
| download | olio-uboot-2014.01-185b3b76a6a2e4eacb9e74a633950231e6787384.tar.xz olio-uboot-2014.01-185b3b76a6a2e4eacb9e74a633950231e6787384.zip | |
MTD: SPEAr SMI: Add write support for length < 4 bytes
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>
| -rw-r--r-- | drivers/mtd/st_smi.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/mtd/st_smi.c b/drivers/mtd/st_smi.c index 77e36af5e..7507e5d07 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]); } /* |