diff options
| author | Pierre Ossman <drzeus@drzeus.cx> | 2008-06-28 18:28:51 +0200 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2008-07-15 14:14:44 +0200 |
| commit | 2134a922c6e75c779983cad5d8aae832275f5a0d (patch) | |
| tree | fb77a7a82cc62c9e788044cc7117b2cd72368c15 /drivers/mmc/host/sdhci-pci.c | |
| parent | 93fc48c785f6266e67663b3cbbf24579b53fe5cf (diff) | |
| download | linux-next-2134a922c6e75c779983cad5d8aae832275f5a0d.tar.gz | |
sdhci: scatter-gather (ADMA) support
Add support for the scatter-gather DMA mode present on newer controllers.
As the mode requires 32-bit alignment, non-aligned chunks are handled by
using a bounce buffer.
Also add some new quirks to handle controllers that have bugs in the
ADMA engine.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/host/sdhci-pci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-pci.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c index 0716dcffd511..deb607c52c0d 100644 --- a/drivers/mmc/host/sdhci-pci.c +++ b/drivers/mmc/host/sdhci-pci.c @@ -142,6 +142,7 @@ static int jmicron_probe(struct sdhci_pci_chip *chip) if (chip->pdev->revision == 0) { chip->quirks |= SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_32BIT_DMA_SIZE | + SDHCI_QUIRK_32BIT_ADMA_SIZE | SDHCI_QUIRK_RESET_AFTER_REQUEST; } @@ -206,6 +207,22 @@ static void jmicron_enable_mmc(struct sdhci_host *host, int on) static int jmicron_probe_slot(struct sdhci_pci_slot *slot) { + if (slot->chip->pdev->revision == 0) { + u16 version; + + version = readl(slot->host->ioaddr + SDHCI_HOST_VERSION); + version = (version & SDHCI_VENDOR_VER_MASK) >> + SDHCI_VENDOR_VER_SHIFT; + + /* + * Older versions of the chip have lots of nasty glitches + * in the ADMA engine. It's best just to avoid it + * completely. + */ + if (version < 0xAC) + slot->host->quirks |= SDHCI_QUIRK_BROKEN_ADMA; + } + /* * The secondary interface requires a bit set to get the * interrupts. |