Hi Shashidhar.
On 09/30/2011 02:40 AM, Shashidhar Hiremath wrote:
> Support of PCI mode for the dw_mmc driver This Patch adds the support for the
> scenario where the Synopsys Designware IP is present on the PCI bus.The patch
> adds the minimal modifications necessary for the driver to work on PCI
> platform. The Driver has also been tested for on the PCI platform with single
> Card Slot.
>
> Signed-off-by: Shashidhar Hiremath <shashidh...@vayavyalabs.com>
> ---
> v2:
> *As per Suggestions by Will Newton and James Hogan
> -Reduced the number of ifdefs
>
> drivers/mmc/host/Kconfig | 11 ++
> drivers/mmc/host/dw_mmc.c | 352
> ++++++++++++++++++++++++++++++++++++++++++++
> drivers/mmc/host/dw_mmc.h | 13 ++
> include/linux/mmc/dw_mmc.h | 4 +
> 4 files changed, 380 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 8c87096..84d8908 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -526,6 +526,17 @@ config MMC_DW
> block, this provides host support for SD and MMC interfaces, in both
> PIO and external DMA modes.
>
> +config MMC_DW_PCI
> + bool "MMC_DW Support On PCI bus"
> + depends on MMC_DW && PCI
> + help
> + This selects the PCI for the Synopsys Designware Mobile Storage IP.
> +
> + If you have a controller with this interface, say Y or M here.
> +
> + If unsure, say N.
> +
> +
> config MMC_DW_IDMAC
> bool "Internal DMAC interface"
> depends on MMC_DW
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index ff0f714..0bd9e16 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -21,6 +21,7 @@
> #include <linux/interrupt.h>
> #include <linux/ioport.h>
> #include <linux/module.h>
> +#include <linux/pci.h>
> #include <linux/platform_device.h>
> #include <linux/scatterlist.h>
> #include <linux/seq_file.h>
> @@ -101,6 +102,7 @@ struct dw_mci_slot {
> int last_detect_state;
> };
>
> +
> static struct workqueue_struct *dw_mci_card_workqueue;
>
> #if defined(CONFIG_DEBUG_FS)
> @@ -682,6 +684,7 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct
> mmc_ios *ios)
> {
> struct dw_mci_slot *slot = mmc_priv(mmc);
> u32 regs;
> + u32 card_detect;
>
> /* set default 1 bit mode */
> slot->ctype = SDMMC_CTYPE_1BIT;
> @@ -716,6 +719,13 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct
> mmc_ios *ios)
> switch (ios->power_mode) {
> case MMC_POWER_UP:
> set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags);
> + /* Enable Power to the card that has been detected */
> + card_detect = mci_readl(slot->host, CDETECT);
> + /* Enabling power for card 0 when PCI is the interface */
> + mci_writel(slot->host, PWREN, ((~card_detect) & 0x1));
> + break;
> + case MMC_POWER_OFF:
> + mci_writel(slot->host, PWREN, 0);
> break;
Using shift with slot->id.(1bit per card).
Regards,
Jaehoon Chung
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