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Commit 9107ebbf authored by Micky Ching's avatar Micky Ching Committed by Chris Ball
Browse files

mmc: sdhci: add support for realtek rts5250 



Add support for realtek rts5250 pci card reader. The card reader has
some problems with DDR50 mode, so add a new quirks2 for broken ddr50.

Signed-off-by: default avatarMicky Ching <micky_ching@realsil.com.cn>
Signed-off-by: default avatarChris Ball <chris@printf.net>
parent b13d1f0f

drivers/mmc/host/sdhci-pci.c

+20 −0
Original line number Diff line number Diff line
@@ -610,6 +610,18 @@ static const struct sdhci_pci_fixes sdhci_via = { 
	.probe		= via_probe,

};



static int rtsx_probe_slot(struct sdhci_pci_slot *slot)

{

	slot->host->mmc->caps2 |= MMC_CAP2_HS200;

	return 0;

}



static const struct sdhci_pci_fixes sdhci_rtsx = {

	.quirks2	= SDHCI_QUIRK2_PRESET_VALUE_BROKEN |

			SDHCI_QUIRK2_BROKEN_DDR50,

	.probe_slot	= rtsx_probe_slot,

};



static const struct pci_device_id pci_ids[] = {

	{

		.vendor		= PCI_VENDOR_ID_RICOH,
@@ -731,6 +743,14 @@ static const struct pci_device_id pci_ids[] = { 
		.driver_data	= (kernel_ulong_t)&sdhci_via,

	},



	{

		.vendor		= PCI_VENDOR_ID_REALTEK,

		.device		= 0x5250,

		.subvendor	= PCI_ANY_ID,

		.subdevice	= PCI_ANY_ID,

		.driver_data	= (kernel_ulong_t)&sdhci_rtsx,

	},



	{

		.vendor		= PCI_VENDOR_ID_INTEL,

		.device		= PCI_DEVICE_ID_INTEL_MRST_SD0,

drivers/mmc/host/sdhci.c

+2 −1
Original line number Diff line number Diff line
@@ -3020,7 +3020,8 @@ int sdhci_add_host(struct sdhci_host *host) 
	} else if (caps[1] & SDHCI_SUPPORT_SDR50)

		mmc->caps |= MMC_CAP_UHS_SDR50;



	if (caps[1] & SDHCI_SUPPORT_DDR50)

	if ((caps[1] & SDHCI_SUPPORT_DDR50) &&

		!(host->quirks2 & SDHCI_QUIRK2_BROKEN_DDR50))

		mmc->caps |= MMC_CAP_UHS_DDR50;



	/* Does the host need tuning for SDR50? */

include/linux/mmc/sdhci.h

+2 −0
Original line number Diff line number Diff line
@@ -100,6 +100,8 @@ struct sdhci_host { 
#define SDHCI_QUIRK2_BROKEN_HOST_CONTROL		(1<<5)

/* Controller does not support HS200 */

#define SDHCI_QUIRK2_BROKEN_HS200			(1<<6)

/* Controller does not support DDR50 */

#define SDHCI_QUIRK2_BROKEN_DDR50			(1<<7)



	int irq;		/* Device IRQ */

	void __iomem *ioaddr;	/* Mapped address */