Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f94540...
Commit: f945405cdecd9e0ae3e58ff84cabd19b4522965e
Parent: 778ef1e6cbb049c9bcbf405936ee6f2b6e451892
Author: Ben Dooks <ben-linux@fluff.org>
AuthorDate: Fri Feb 20 20:33:08 2009 +0300
Committer: Pierre Ossman <drzeus@drzeus.cx>
CommitDate: Mon Mar 2 21:46:35 2009 +0100
sdhci: Add quirk for controllers with no end-of-busy IRQ
The Samsung SDHCI (and FSL eSDHC) controller block seems to fail
to generate an INT_DATA_END after the transfer has completed and
the bus busy state finished.
Changes in e809517f6fa5803a5a1cd56026f0e2190fc13d5c to use the
new busy method are the cause of the behaviour change.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
---
drivers/mmc/host/sdhci.c | 5 ++++-
drivers/mmc/host/sdhci.h | 2 ++
2 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index f52f305..accb592 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1291,8 +1291,11 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
if (host->cmd->data)
DBG("Cannot wait for busy signal when also "
"doing a data transfer");
- else
+ else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ))
return;
+
+ /* The controller does not support the end-of-busy IRQ,
+ * fall through and take the SDHCI_INT_RESPONSE */
}
if (intmask & SDHCI_INT_RESPONSE)
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index ebb8365..43c37c6 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -208,6 +208,8 @@ struct sdhci_host {
#define SDHCI_QUIRK_BROKEN_TIMEOUT_VAL (1<<12)
/* Controller has an issue with buffer bits for small transfers */
#define SDHCI_QUIRK_BROKEN_SMALL_PIO (1<<13)
+/* Controller does not provide transfer-complete interrupt when not busy */
+#define SDHCI_QUIRK_NO_BUSY_IRQ (1<<14)
int irq; /* Device IRQ */
void __iomem * ioaddr; /* Mapped address */
--
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