Commit 812089e0 authored by Andy Lutomirski's avatar Andy Lutomirski Committed by Bjorn Helgaas
Browse files

PCI: Reduce Ricoh 0xe822 SD card reader base clock frequency to 50MHz 



Otherwise it fails like this on cards like the Transcend 16GB SDHC card:

    mmc0: new SDHC card at address b368
    mmcblk0: mmc0:b368 SDC   15.0 GiB
    mmcblk0: error -110 sending status command, retrying
    mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb0

Tested on my Lenovo x200 laptop.

[bhelgaas: changelog]
Signed-off-by: default avatarAndy Lutomirski <luto@amacapital.net>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Acked-by: default avatarChris Ball <cjb@laptop.org>
CC: Manoj Iyer <manoj.iyer@canonical.com>
CC: stable@vger.kernel.org
parent c733b774

drivers/pci/quirks.c

+5 −2
Original line number Diff line number Diff line
@@ -2725,7 +2725,7 @@ static void ricoh_mmc_fixup_r5c832(struct pci_dev *dev) 
	if (PCI_FUNC(dev->devfn))

		return;

	/*

	 * RICOH 0xe823 SD/MMC card reader fails to recognize

	 * RICOH 0xe822 and 0xe823 SD/MMC card readers fail to recognize

	 * certain types of SD/MMC cards. Lowering the SD base

	 * clock frequency from 200Mhz to 50Mhz fixes this issue.

	 *
@@ -2736,7 +2736,8 @@ static void ricoh_mmc_fixup_r5c832(struct pci_dev *dev) 
	 * 0xf9  - Key register for 0x150

	 * 0xfc  - key register for 0xe1

	 */

	if (dev->device == PCI_DEVICE_ID_RICOH_R5CE823) {

	if (dev->device == PCI_DEVICE_ID_RICOH_R5CE822 ||

	    dev->device == PCI_DEVICE_ID_RICOH_R5CE823) {

		pci_write_config_byte(dev, 0xf9, 0xfc);

		pci_write_config_byte(dev, 0x150, 0x10);

		pci_write_config_byte(dev, 0xf9, 0x00);
@@ -2763,6 +2764,8 @@ static void ricoh_mmc_fixup_r5c832(struct pci_dev *dev) 
}

DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5C832, ricoh_mmc_fixup_r5c832);

DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5C832, ricoh_mmc_fixup_r5c832);

DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE822, ricoh_mmc_fixup_r5c832);

DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE822, ricoh_mmc_fixup_r5c832);

DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE823, ricoh_mmc_fixup_r5c832);

DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5CE823, ricoh_mmc_fixup_r5c832);

#endif /*CONFIG_MMC_RICOH_MMC*/

include/linux/pci_ids.h

+1 −0
Original line number Diff line number Diff line
@@ -1568,6 +1568,7 @@ 
#define PCI_DEVICE_ID_RICOH_RL5C476	0x0476

#define PCI_DEVICE_ID_RICOH_RL5C478	0x0478

#define PCI_DEVICE_ID_RICOH_R5C822	0x0822

#define PCI_DEVICE_ID_RICOH_R5CE822	0xe822

#define PCI_DEVICE_ID_RICOH_R5CE823	0xe823

#define PCI_DEVICE_ID_RICOH_R5C832	0x0832

#define PCI_DEVICE_ID_RICOH_R5C843	0x0843

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