On Mon, Aug 2, 2010 at 9:11 PM, Roy Zang <tie-fei.zang@xxxxxxxxxxxxx> wrote:
> From: Jerry Huang <Chang-Ming.Huang@xxxxxxxxxxxxx>
>
> Add auto CMD12 command support for eSDHC driver.
> This is needed by P4080 and P1022 for block read/write.
> Manual asynchronous CMD12 abort operation causes protocol violations on
> these silicons.
>
> Signed-off-by: Jerry Huang <Chang-Ming.Huang@xxxxxxxxxxxxx>
> Signed-off-by: Roy Zang <tie-fei.zang@xxxxxxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-of-core.c | 4 ++++
> drivers/mmc/host/sdhci.c | 14 ++++++++++++--
> drivers/mmc/host/sdhci.h | 2 ++
> 3 files changed, 18 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index c6d1bd8..a92566e 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -817,8 +817,12 @@ static void sdhci_set_transfer_mode(struct sdhci_host *host,
> WARN_ON(!host->data);
>
> mode = SDHCI_TRNS_BLK_CNT_EN;
> - if (data->blocks > 1)
> - mode |= SDHCI_TRNS_MULTI;
> + if (data->blocks > 1) {
> + if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)
> + mode |= SDHCI_TRNS_MULTI | SDHCI_TRNS_ACMD12;
> + else
> + mode |= SDHCI_TRNS_MULTI;
nit:
+ mode |= SDHCI_TRNS_MULTI;
+ if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)
+ mode |= SDHCI_TRNS_ACMD12;
Clearer, no?
> + }
> if (data->flags & MMC_DATA_READ)
> mode |= SDHCI_TRNS_READ;
> if (host->flags & SDHCI_REQ_USE_DMA)
--
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