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Blackfin: bfin_sdh: add support for multiblock operations

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Don't forget to count full data size for the multiblock operation request.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Sonic Zhang 2010-12-30 08:38:00 +00:00 committed by Mike Frysinger
parent 1fd2d792a2
commit 21a50374d5
1 changed files with 5 additions and 4 deletions
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9
drivers/mmc/bfin_sdh.c
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@ -114,11 +114,12 @@ static int sdh_setup_data(struct mmc *mmc, struct mmc_data *data)
u16 data_ctl = 0;
u16 dma_cfg = 0;
int ret = 0;
unsigned long data_size = data->blocksize * data->blocks;
/* Don't support write yet. */
if (data->flags & MMC_DATA_WRITE)
return UNUSABLE_ERR;
data_ctl |= ((ffs(data->blocksize) - 1) << 4);
data_ctl |= ((ffs(data_size) - 1) << 4);
data_ctl |= DTX_DIR;
bfin_write_SDH_DATA_CTL(data_ctl);
dma_cfg = WDSIZE_32 | RESTART | WNR | DMAEN;
@ -126,13 +127,13 @@ static int sdh_setup_data(struct mmc *mmc, struct mmc_data *data)
bfin_write_SDH_DATA_TIMER(-1);
blackfin_dcache_flush_invalidate_range(data->dest,
data->dest + data->blocksize);
data->dest + data_size);
/* configure DMA */
bfin_write_DMA_START_ADDR(data->dest);
bfin_write_DMA_X_COUNT(data->blocksize / 4);
bfin_write_DMA_X_COUNT(data_size / 4);
bfin_write_DMA_X_MODIFY(4);
bfin_write_DMA_CONFIG(dma_cfg);
bfin_write_SDH_DATA_LGTH(data->blocksize);
bfin_write_SDH_DATA_LGTH(data_size);
/* kick off transfer */
bfin_write_SDH_DATA_CTL(bfin_read_SDH_DATA_CTL() | DTX_DMA_E | DTX_E);