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| author | Thomas Abraham <thomas.ab@samsung.com> | 2010-05-26 14:42:04 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-27 09:12:40 -0700 |
| commit | 70764a905785ebacc8d44fed7a12fba3db267ae6 (patch) | |
| tree | 0d4fbf97f88182a8679af78d9de9b20f1b3916d0 /drivers/mmc/host/sdhci.c | |
| parent | dc297c92e6e63af5cbd7e7d2f377247f5664a378 (diff) | |
| download | op-kernel-dev-70764a905785ebacc8d44fed7a12fba3db267ae6.zip op-kernel-dev-70764a905785ebacc8d44fed7a12fba3db267ae6.tar.gz | |
mmc: s3c6410: add new quirk in sdhci driver and update ADMA descriptor build
The s3c6410 sdhci controller does not support the 'End' attribute and NOP
attribute in the same 8-Byte ADMA descriptor. This patch adds a new quirk
to identify sdhci host contollers with such behaviour. In addition to
this, for controllers using the new quirk, the last entry in the ADMA
descritor table is marked with the 'End' attribute (instead of using a NOP
descriptor with 'End' attribute).
Signed-off-by: Maurus Cuelenaere <mcuelenaere@gmail.com>
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Acked-by: Ben Dooks <ben-linux@fluff.org>
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/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 02b365f..d27cc91 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -496,12 +496,22 @@ static int sdhci_adma_table_pre(struct sdhci_host *host, WARN_ON((desc - host->adma_desc) > (128 * 2 + 1) * 4); } - /* - * Add a terminating entry. - */ + if (host->quirks & SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC) { + /* + * Mark the last descriptor as the terminating descriptor + */ + if (desc != host->adma_desc) { + desc -= 8; + desc[0] |= 0x2; /* end */ + } + } else { + /* + * Add a terminating entry. + */ - /* nop, end, valid */ - sdhci_set_adma_desc(desc, 0, 0, 0x3); + /* nop, end, valid */ + sdhci_set_adma_desc(desc, 0, 0, 0x3); + } /* * Resync align buffer as we might have changed it. |
