Hi Girish, Well..just tested on my board. this patch didn't work.(eMMC card didn't initialize) meaning of ios->bus_mode and synosys's bus_mode is same? How did you test this patch?
Best Regards, Jaehoon Chung On 07/23/2012 08:16 PM, Girish K S wrote: > Synopsis Designware host controller has suppport for open > drain mode selection. During the mmc card initialization the > host controller can select the open-drain bit to allow the device > initialization in the open-drain mode. Once the device enters > the standby mode this bit can be reset to enter push-pull mode. > > Signed-off-by: Girish K S <[email protected]> > --- > drivers/mmc/host/dw_mmc.c | 14 ++++++++++++++ > drivers/mmc/host/dw_mmc.h | 1 + > 2 files changed, 15 insertions(+), 0 deletions(-) > > diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c > index 72dc3cd..da11e5a 100644 > --- a/drivers/mmc/host/dw_mmc.c > +++ b/drivers/mmc/host/dw_mmc.c > @@ -773,6 +773,18 @@ static void dw_mci_request(struct mmc_host *mmc, struct > mmc_request *mrq) > spin_unlock_bh(&host->lock); > } > > +static void dw_mci_set_busmode(struct dw_mci_slot *slot) > +{ > + struct mmc_ios *ios = &slot->mmc->ios; > + u32 reg; > + > + reg = mci_readl(slot->host, CTRL); > + if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) > + mci_writel(slot->host, CTRL, reg | SDMMC_CTRL_ENABLE_OD); > + else > + mci_writel(slot->host, CTRL, reg & ~SDMMC_CTRL_ENABLE_OD); > +} > + > static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > { > struct dw_mci_slot *slot = mmc_priv(mmc); > @@ -818,6 +830,8 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct > mmc_ios *ios) > default: > break; > } > + > + dw_mci_set_busmode(slot); > } > > static int dw_mci_get_ro(struct mmc_host *mmc) > diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h > index 15c27e1..1a53fb2 100644 > --- a/drivers/mmc/host/dw_mmc.h > +++ b/drivers/mmc/host/dw_mmc.h > @@ -67,6 +67,7 @@ > > /* Control register defines */ > #define SDMMC_CTRL_USE_IDMAC BIT(25) > +#define SDMMC_CTRL_ENABLE_OD BIT(24) > #define SDMMC_CTRL_CEATA_INT_EN BIT(11) > #define SDMMC_CTRL_SEND_AS_CCSD BIT(10) > #define SDMMC_CTRL_SEND_CCSD BIT(9) > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
