diff options
| author | Sahitya Tummala <stummala@codeaurora.org> | 2010-12-08 10:33:06 +0100 |
|---|---|---|
| committer | David Brown <davidb@codeaurora.org> | 2010-12-20 21:28:31 +0100 |
| commit | 71dd9106af54de0f758875fa4b595af42a327448 (patch) | |
| tree | c695aa16ad30d59cb04a0f3dd7073a0a196df957 /drivers/mmc/host/msm_sdcc.c | |
| parent | mmc: msm_sdcc: Reset SDCC in case of data transfer errors (diff) | |
| download | linux-71dd9106af54de0f758875fa4b595af42a327448.tar.xz linux-71dd9106af54de0f758875fa4b595af42a327448.zip | |
mmc: msm_sdcc: Fix bug in PIO mode when data size is not word aligned
The current code for PIO doesn't transfer whole data when data size
is not in multiple of 4 bytes. The last few bytes are not written to
the card resulting in no DATAEND interrupt from SDCC. This patch
allows data transfer for non-aligned data size in PIO mode.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
Diffstat (limited to 'drivers/mmc/host/msm_sdcc.c')
| -rw-r--r-- | drivers/mmc/host/msm_sdcc.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c index 81ed16fb42b5..9badc51bc4db 100644 --- a/drivers/mmc/host/msm_sdcc.c +++ b/drivers/mmc/host/msm_sdcc.c @@ -613,6 +613,9 @@ msmsdcc_pio_read(struct msmsdcc_host *host, char *buffer, unsigned int remain) uint32_t *ptr = (uint32_t *) buffer; int count = 0; + if (remain % 4) + remain = ((remain >> 2) + 1) << 2; + while (msmsdcc_readl(host, MMCISTATUS) & MCI_RXDATAAVLBL) { *ptr = msmsdcc_readl(host, MMCIFIFO + (count % MCI_FIFOSIZE)); ptr++; @@ -633,13 +636,14 @@ msmsdcc_pio_write(struct msmsdcc_host *host, char *buffer, char *ptr = buffer; do { - unsigned int count, maxcnt; + unsigned int count, maxcnt, sz; maxcnt = status & MCI_TXFIFOEMPTY ? MCI_FIFOSIZE : MCI_FIFOHALFSIZE; count = min(remain, maxcnt); - writesl(base + MMCIFIFO, ptr, count >> 2); + sz = count % 4 ? (count >> 2) + 1 : (count >> 2); + writesl(base + MMCIFIFO, ptr, sz); ptr += count; remain -= count; |