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sdhci: Add SDHCI_QUIRK_NO_MULTIBLOCK quirk

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Add quirk to show the controller cannot do multi-block IO.

This is mainly for the Samsung SDHCI controller that currently
cannot manage to do multi-block PIO without timing out.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
This commit is contained in:
Ben Dooks 2009-06-14 12:40:53 +01:00 committed by Pierre Ossman
parent 6882a8c071
commit 1388eefd5a
3 changed files with 6 additions and 1 deletions
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3
drivers/mmc/host/sdhci-s3c.c
View file

@ -329,6 +329,9 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
* support as well. */
host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
/* PIO currently has problems with multi-block IO */
host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK;
#endif /* CONFIG_MMC_SDHCI_S3C_DMA */
/* It seems we do not get an DATA transfer complete on non-busy

2
drivers/mmc/host/sdhci.c
View file

@ -1834,7 +1834,7 @@ int sdhci_add_host(struct sdhci_host *host)
/*
* Maximum block count.
*/
mmc->max_blk_count = 65535;
mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535;
/*
* Init tasklets.

2
drivers/mmc/host/sdhci.h
View file

@ -226,6 +226,8 @@ struct sdhci_host {
#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)
/* Controller cannot do multi-block transfers */
#define SDHCI_QUIRK_NO_MULTIBLOCK (1<<21)
int irq; /* Device IRQ */
void __iomem * ioaddr; /* Mapped address */