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-rw-r--r--drivers/mmc/host/sdhci.c20
-rw-r--r--drivers/mmc/host/sdhci.h2
2 files changed, 15 insertions, 7 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 3a72fe2cf1c..30d8e3d4e6f 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1777,13 +1777,19 @@ int sdhci_add_host(struct sdhci_host *host)
* Maximum block size. This varies from controller to controller and
* is specified in the capabilities register.
*/
- mmc->max_blk_size = (caps & SDHCI_MAX_BLOCK_MASK) >> SDHCI_MAX_BLOCK_SHIFT;
- if (mmc->max_blk_size >= 3) {
- printk(KERN_WARNING "%s: Invalid maximum block size, "
- "assuming 512 bytes\n", mmc_hostname(mmc));
- mmc->max_blk_size = 512;
- } else
- mmc->max_blk_size = 512 << mmc->max_blk_size;
+ if (host->quirks & SDHCI_QUIRK_FORCE_BLK_SZ_2048) {
+ mmc->max_blk_size = 2;
+ } else {
+ mmc->max_blk_size = (caps & SDHCI_MAX_BLOCK_MASK) >>
+ SDHCI_MAX_BLOCK_SHIFT;
+ if (mmc->max_blk_size >= 3) {
+ printk(KERN_WARNING "%s: Invalid maximum block size, "
+ "assuming 512 bytes\n", mmc_hostname(mmc));
+ mmc->max_blk_size = 0;
+ }
+ }
+
+ mmc->max_blk_size = 512 << mmc->max_blk_size;
/*
* Maximum block count.
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 2962102b695..f20a834f430 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -224,6 +224,8 @@ struct sdhci_host {
#define SDHCI_QUIRK_PIO_NEEDS_DELAY (1<<18)
/* Controller losing signal/interrupt enable states after reset */
#define SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET (1<<19)
+/* Controller has to be forced to use block size of 2048 bytes */
+#define SDHCI_QUIRK_FORCE_BLK_SZ_2048 (1<<20)
int irq; /* Device IRQ */
void __iomem * ioaddr; /* Mapped address */