diff options
| author | Ben Dooks <ben-linux@fluff.org> | 2010-03-05 13:43:26 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-06 11:26:36 -0800 |
| commit | 118cd17d4137f34c747c32765c1cb4d3910c04d4 (patch) | |
| tree | 37770764fb27313fa15ebb1bc29c13673614f185 /drivers/mmc | |
| parent | 3fb7fb4a01d09f81d1daaf65e52d929734bd691f (diff) | |
sdhci: add adma descriptor set call
The code to write the ADMA descriptor into memory is repeated several
times throughout sdhci_adma_table_pre, and thus should be moved into a
common function. This will also be useful if the patch to make the write
more efficient is accepted.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 50 |
1 files changed, 20 insertions, 30 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index c279fbc4c2e5..fcdd00785033 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -376,6 +376,20 @@ static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags) local_irq_restore(*flags); } +static void sdhci_set_adma_desc(u8 *desc, u32 addr, int len, unsigned cmd) +{ + desc[7] = (addr >> 24) & 0xff; + desc[6] = (addr >> 16) & 0xff; + desc[5] = (addr >> 8) & 0xff; + desc[4] = (addr >> 0) & 0xff; + + desc[3] = (len >> 8) & 0xff; + desc[2] = (len >> 0) & 0xff; + + desc[0] = cmd & 0xff; + desc[1] = cmd >> 8; +} + static int sdhci_adma_table_pre(struct sdhci_host *host, struct mmc_data *data) { @@ -443,19 +457,11 @@ static int sdhci_adma_table_pre(struct sdhci_host *host, sdhci_kunmap_atomic(buffer, &flags); } - desc[7] = (align_addr >> 24) & 0xff; - desc[6] = (align_addr >> 16) & 0xff; - desc[5] = (align_addr >> 8) & 0xff; - desc[4] = (align_addr >> 0) & 0xff; + /* tran, valid */ + sdhci_set_adma_desc(desc, align_addr, offset, 0x21); BUG_ON(offset > 65536); - desc[3] = (offset >> 8) & 0xff; - desc[2] = (offset >> 0) & 0xff; - - desc[1] = 0x00; - desc[0] = 0x21; /* tran, valid */ - align += 4; align_addr += 4; @@ -465,19 +471,10 @@ static int sdhci_adma_table_pre(struct sdhci_host *host, len -= offset; } - desc[7] = (addr >> 24) & 0xff; - desc[6] = (addr >> 16) & 0xff; - desc[5] = (addr >> 8) & 0xff; - desc[4] = (addr >> 0) & 0xff; - BUG_ON(len > 65536); - desc[3] = (len >> 8) & 0xff; - desc[2] = (len >> 0) & 0xff; - - desc[1] = 0x00; - desc[0] = 0x21; /* tran, valid */ - + /* tran, valid */ + sdhci_set_adma_desc(desc, addr, len, 0x21); desc += 8; /* @@ -490,16 +487,9 @@ static int sdhci_adma_table_pre(struct sdhci_host *host, /* * Add a terminating entry. */ - desc[7] = 0; - desc[6] = 0; - desc[5] = 0; - desc[4] = 0; - - desc[3] = 0; - desc[2] = 0; - desc[1] = 0x00; - desc[0] = 0x03; /* nop, end, valid */ + /* nop, end, valid */ + sdhci_set_adma_desc(desc, 0, 0, 0x3); /* * Resync align buffer as we might have changed it. |