thanks for reply Jaehoon,
The reason I had hard coded was the PCI card that I was using had a
single SD/MMC slot. I will make necessary change and submit another
patch.
On Fri, Sep 30, 2011 at 7:21 AM, Jaehoon Chung <jh80.ch...@samsung.com> wrote:
> 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
>
--
regards,
Shashidhar Hiremath
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