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authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-03-17 00:13:54 +0300
committerPierre Ossman <drzeus@drzeus.cx>2009-03-24 23:30:09 +0300
commitc5075a1089e808d8f471ce21b02810cc98ab2692 (patch)
tree25780a5db4a56e51a736c45bfb2cc8fe132fbd11 /drivers/mmc
parent68d1fb7e229c6f95be4fbbe3eb46b24e41184924 (diff)
downloadlinux-c5075a1089e808d8f471ce21b02810cc98ab2692.tar.xz
sdhci: Add support for hosts reporting inverted write-protect state
This patch adds SDHCI_QUIRK_INVERTED_WRITE_PROTECT quirk. When specified, the sdhci driver will invert WP state. p.s. Actually, the quirk is more board-specific than controller-specific. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci.c2
-rw-r--r--drivers/mmc/host/sdhci.h2
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index fc7cb489bdb7..c814220d214e 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1149,6 +1149,8 @@ static int sdhci_get_ro(struct mmc_host *mmc)
spin_unlock_irqrestore(&host->lock, flags);
+ if (host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT)
+ return !!(present & SDHCI_WRITE_PROTECT);
return !(present & SDHCI_WRITE_PROTECT);
}
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 968d713950f1..6980f2725b85 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -216,6 +216,8 @@ struct sdhci_host {
#define SDHCI_QUIRK_NO_BUSY_IRQ (1<<14)
/* Controller has unreliable card detection */
#define SDHCI_QUIRK_BROKEN_CARD_DETECTION (1<<15)
+/* Controller reports inverted write-protect state */
+#define SDHCI_QUIRK_INVERTED_WRITE_PROTECT (1<<16)
int irq; /* Device IRQ */
void __iomem * ioaddr; /* Mapped address */