Re: sdhci: Loads of scary messages during suspend/resume with SD card inserted

[Frans Pop]

Hi Matthew,

What's the status of this patch? If you like I can submit it (with the 
minor fixes that were needed). Or are there issues with it?

My tests showed that it did not fix all suspend/resume problems, but it 
was a structural improvement.

Cheers,
FJP

On Monday 29 September 2008, Matthew Garrett wrote:
> More to the point, how about this one? It should also handle the resume
> case, but I haven't tested it yet.
>
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index ea8d7a3..806bcd8 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -48,23 +48,6 @@ config MMC_SDHCI_PCI
>
>  	  If unsure, say N.
>
> -config MMC_RICOH_MMC
> -	tristate "Ricoh MMC Controller Disabler  (EXPERIMENTAL)"
> -	depends on MMC_SDHCI_PCI
> -	help
> -	  This selects the disabler for the Ricoh MMC Controller. This
> -	  proprietary controller is unnecessary because the SDHCI driver
> -	  supports MMC cards on the SD controller, but if it is not
> -	  disabled, it will steal the MMC cards away - rendering them
> -	  useless. It is safe to select this driver even if you don't
> -	  have a Ricoh based card reader.
> -
> -
> -	  To compile this driver as a module, choose M here:
> -	  the module will be called ricoh_mmc.
> -
> -	  If unsure, say Y.
> -
>  config MMC_OMAP
>  	tristate "TI OMAP Multimedia Card Interface support"
>  	depends on ARCH_OMAP
> diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
> index c794cc5..0676890 100644
> --- a/drivers/mmc/host/Makefile
> +++ b/drivers/mmc/host/Makefile
> @@ -11,7 +11,6 @@ obj-$(CONFIG_MMC_PXA)		+= pxamci.o
>  obj-$(CONFIG_MMC_IMX)		+= imxmmc.o
>  obj-$(CONFIG_MMC_SDHCI)		+= sdhci.o
>  obj-$(CONFIG_MMC_SDHCI_PCI)	+= sdhci-pci.o
> -obj-$(CONFIG_MMC_RICOH_MMC)	+= ricoh_mmc.o
>  obj-$(CONFIG_MMC_WBSD)		+= wbsd.o
>  obj-$(CONFIG_MMC_AU1X)		+= au1xmmc.o
>  obj-$(CONFIG_MMC_OMAP)		+= omap.o
> diff --git a/drivers/mmc/host/ricoh_mmc.c
> b/drivers/mmc/host/ricoh_mmc.c deleted file mode 100644
> index a16d760..0000000
> --- a/drivers/mmc/host/ricoh_mmc.c
> +++ /dev/null
> @@ -1,257 +0,0 @@
> -/*
> - *  ricoh_mmc.c - Dummy driver to disable the Rioch MMC controller.
> - *
> - *  Copyright (C) 2007 Philip Langdale, All Rights Reserved.
> - *
> - * This program is free software; you can redistribute it and/or
> modify - * it under the terms of the GNU General Public License as
> published by - * the Free Software Foundation; either version 2 of the
> License, or (at - * your option) any later version.
> - */
> -
> -/*
> - * This is a conceptually ridiculous driver, but it is required by the
> way - * the Ricoh multi-function R5C832 works. This chip implements
> firewire - * and four different memory card controllers. Two of those
> controllers are - * an SDHCI controller and a proprietary MMC
> controller. The linux SDHCI - * driver supports MMC cards but the chip
> detects MMC cards in hardware - * and directs them to the MMC
> controller - so the SDHCI driver never sees - * them. To get around
> this, we must disable the useless MMC controller. - * At that point,
> the SDHCI controller will start seeing them. As a bonus, - * a
> detection event occurs immediately, even if the MMC card is already - *
> in the reader.
> - *
> - * The relevant registers live on the firewire function, so this is
> unavoidably - * ugly. Such is life.
> - */
> -
> -#include <linux/pci.h>
> -
> -#define DRIVER_NAME "ricoh-mmc"
> -
> -static const struct pci_device_id pci_ids[] __devinitdata = {
> -	{
> -		.vendor		= PCI_VENDOR_ID_RICOH,
> -		.device		= PCI_DEVICE_ID_RICOH_R5C843,
> -		.subvendor	= PCI_ANY_ID,
> -		.subdevice	= PCI_ANY_ID,
> -	},
> -	{ /* end: all zeroes */ },
> -};
> -
> -MODULE_DEVICE_TABLE(pci, pci_ids);
> -
> -static int ricoh_mmc_disable(struct pci_dev *fw_dev)
> -{
> -	u8 write_enable;
> -	u8 write_target;
> -	u8 disable;
> -
> -	if (fw_dev->device == PCI_DEVICE_ID_RICOH_RL5C476) {
> -		/* via RL5C476 */
> -
> -		pci_read_config_byte(fw_dev, 0xB7, &disable);
> -		if (disable & 0x02) {
> -			printk(KERN_INFO DRIVER_NAME
> -				": Controller already disabled. " \
> -				"Nothing to do.\n");
> -			return -ENODEV;
> -		}
> -
> -		pci_read_config_byte(fw_dev, 0x8E, &write_enable);
> -		pci_write_config_byte(fw_dev, 0x8E, 0xAA);
> -		pci_read_config_byte(fw_dev, 0x8D, &write_target);
> -		pci_write_config_byte(fw_dev, 0x8D, 0xB7);
> -		pci_write_config_byte(fw_dev, 0xB7, disable | 0x02);
> -		pci_write_config_byte(fw_dev, 0x8E, write_enable);
> -		pci_write_config_byte(fw_dev, 0x8D, write_target);
> -	} else {
> -		/* via R5C832 */
> -
> -		pci_read_config_byte(fw_dev, 0xCB, &disable);
> -		if (disable & 0x02) {
> -			printk(KERN_INFO DRIVER_NAME
> -			       ": Controller already disabled. " \
> -				"Nothing to do.\n");
> -			return -ENODEV;
> -		}
> -
> -		pci_read_config_byte(fw_dev, 0xCA, &write_enable);
> -		pci_write_config_byte(fw_dev, 0xCA, 0x57);
> -		pci_write_config_byte(fw_dev, 0xCB, disable | 0x02);
> -		pci_write_config_byte(fw_dev, 0xCA, write_enable);
> -	}
> -
> -	printk(KERN_INFO DRIVER_NAME
> -	       ": Controller is now disabled.\n");
> -
> -	return 0;
> -}
> -
> -static int ricoh_mmc_enable(struct pci_dev *fw_dev)
> -{
> -	u8 write_enable;
> -	u8 write_target;
> -	u8 disable;
> -
> -	if (fw_dev->device == PCI_DEVICE_ID_RICOH_RL5C476) {
> -		/* via RL5C476 */
> -
> -		pci_read_config_byte(fw_dev, 0x8E, &write_enable);
> -		pci_write_config_byte(fw_dev, 0x8E, 0xAA);
> -		pci_read_config_byte(fw_dev, 0x8D, &write_target);
> -		pci_write_config_byte(fw_dev, 0x8D, 0xB7);
> -		pci_read_config_byte(fw_dev, 0xB7, &disable);
> -		pci_write_config_byte(fw_dev, 0xB7, disable & ~0x02);
> -		pci_write_config_byte(fw_dev, 0x8E, write_enable);
> -		pci_write_config_byte(fw_dev, 0x8D, write_target);
> -	} else {
> -		/* via R5C832 */
> -
> -		pci_read_config_byte(fw_dev, 0xCA, &write_enable);
> -		pci_read_config_byte(fw_dev, 0xCB, &disable);
> -		pci_write_config_byte(fw_dev, 0xCA, 0x57);
> -		pci_write_config_byte(fw_dev, 0xCB, disable & ~0x02);
> -		pci_write_config_byte(fw_dev, 0xCA, write_enable);
> -	}
> -
> -	printk(KERN_INFO DRIVER_NAME
> -	       ": Controller is now re-enabled.\n");
> -
> -	return 0;
> -}
> -
> -static int __devinit ricoh_mmc_probe(struct pci_dev *pdev,
> -				     const struct pci_device_id *ent)
> -{
> -	u8 rev;
> -	u8 ctrlfound = 0;
> -
> -	struct pci_dev *fw_dev = NULL;
> -
> -	BUG_ON(pdev == NULL);
> -	BUG_ON(ent == NULL);
> -
> -	pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
> -
> -	printk(KERN_INFO DRIVER_NAME
> -		": Ricoh MMC controller found at %s [%04x:%04x] (rev %x)\n",
> -		pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
> -		(int)rev);
> -
> -	while ((fw_dev =
> -		pci_get_device(PCI_VENDOR_ID_RICOH,
> -			PCI_DEVICE_ID_RICOH_RL5C476, fw_dev))) {
> -		if (PCI_SLOT(pdev->devfn) == PCI_SLOT(fw_dev->devfn) &&
> -		    pdev->bus == fw_dev->bus) {
> -			if (ricoh_mmc_disable(fw_dev) != 0)
> -				return -ENODEV;
> -
> -			pci_set_drvdata(pdev, fw_dev);
> -
> -			++ctrlfound;
> -			break;
> -		}
> -	}
> -
> -	fw_dev = NULL;
> -
> -	while (!ctrlfound &&
> -	    (fw_dev = pci_get_device(PCI_VENDOR_ID_RICOH,
> -					PCI_DEVICE_ID_RICOH_R5C832, fw_dev))) {
> -		if (PCI_SLOT(pdev->devfn) == PCI_SLOT(fw_dev->devfn) &&
> -		    pdev->bus == fw_dev->bus) {
> -			if (ricoh_mmc_disable(fw_dev) != 0)
> -				return -ENODEV;
> -
> -			pci_set_drvdata(pdev, fw_dev);
> -
> -			++ctrlfound;
> -		}
> -	}
> -
> -	if (!ctrlfound) {
> -		printk(KERN_WARNING DRIVER_NAME
> -		       ": Main firewire function not found. Cannot disable
> controller.\n"); -		return -ENODEV;
> -	}
> -
> -	return 0;
> -}
> -
> -static void __devexit ricoh_mmc_remove(struct pci_dev *pdev)
> -{
> -	struct pci_dev *fw_dev = NULL;
> -
> -	fw_dev = pci_get_drvdata(pdev);
> -	BUG_ON(fw_dev == NULL);
> -
> -	ricoh_mmc_enable(fw_dev);
> -
> -	pci_set_drvdata(pdev, NULL);
> -}
> -
> -static int ricoh_mmc_suspend(struct pci_dev *pdev, pm_message_t state)
> -{
> -	struct pci_dev *fw_dev = NULL;
> -
> -	fw_dev = pci_get_drvdata(pdev);
> -	BUG_ON(fw_dev == NULL);
> -
> -	printk(KERN_INFO DRIVER_NAME ": Suspending.\n");
> -
> -	ricoh_mmc_enable(fw_dev);
> -
> -	return 0;
> -}
> -
> -static int ricoh_mmc_resume(struct pci_dev *pdev)
> -{
> -	struct pci_dev *fw_dev = NULL;
> -
> -	fw_dev = pci_get_drvdata(pdev);
> -	BUG_ON(fw_dev == NULL);
> -
> -	printk(KERN_INFO DRIVER_NAME ": Resuming.\n");
> -
> -	ricoh_mmc_disable(fw_dev);
> -
> -	return 0;
> -}
> -
> -static struct pci_driver ricoh_mmc_driver = {
> -	.name = 	DRIVER_NAME,
> -	.id_table =	pci_ids,
> -	.probe = 	ricoh_mmc_probe,
> -	.remove =	__devexit_p(ricoh_mmc_remove),
> -	.suspend =	ricoh_mmc_suspend,
> -	.resume =	ricoh_mmc_resume,
> -};
> -
> -/*********************************************************************
>********\ - *                                                           
>                * - * Driver init/exit                                  
>                        * - *                                           
>                                *
> -\*********************************************************************
>********/ -
> -static int __init ricoh_mmc_drv_init(void)
> -{
> -	printk(KERN_INFO DRIVER_NAME
> -		": Ricoh MMC Controller disabling driver\n");
> -	printk(KERN_INFO DRIVER_NAME ": Copyright(c) Philip Langdale\n");
> -
> -	return pci_register_driver(&ricoh_mmc_driver);
> -}
> -
> -static void __exit ricoh_mmc_drv_exit(void)
> -{
> -	pci_unregister_driver(&ricoh_mmc_driver);
> -}
> -
> -module_init(ricoh_mmc_drv_init);
> -module_exit(ricoh_mmc_drv_exit);
> -
> -MODULE_AUTHOR("Philip Langdale <philipl@xxxxxxxxxxxxxxxxx>");
> -MODULE_DESCRIPTION("Ricoh MMC Controller disabling driver");
> -MODULE_LICENSE("GPL");
> -
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 9236e7f..4557fa3 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -1790,6 +1790,74 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_BROADCOM,
>  			 PCI_DEVICE_ID_NX2_5709S,
>  			 quirk_brcm_570x_limit_vpd);
>
> +/*
> + * This is a conceptually ridiculous quirk, but it is required by the
> + * way the Ricoh multi-function R5C832 works. This chip implements
> + * firewire and four different memory card controllers. Two of those
> + * controllers are an SDHCI controller and a proprietary MMC
> + * controller. The linux SDHCI driver supports MMC cards but the chip
> + * detects MMC cards in hardware and directs them to the MMC
> + * controller - so the SDHCI driver never sees them. To get around
> + * this, we must disable the useless MMC controller.  At that point,
> + * the SDHCI controller will start seeing them. As a bonus, a
> + * detection event occurs immediately, even if the MMC card is already
> + * in the reader.
> + *
> + * The relevant registers live on the firewire function, so this is
> + * unavoidably ugly. Such is life.
> + */
> +
> +static void quirk_ricoh_rl5c476_mmc_disable(struct pci_dev *dev)
> +{
> +	u8 write_enable;
> +	u8 write_target;
> +	u8 disable;
> +
> +	pci_read_config_byte(dev, 0xB7, &disable);
> +
> +	if (disable & 0x02)
> +		/* Already disabled */
> +		return;
> +
> +	pci_read_config_byte(dev, 0x8E, &write_enable);
> +	pci_write_config_byte(dev, 0x8E, 0xAA);
> +	pci_read_config_byte(dev, 0x8D, &write_target);
> +	pci_write_config_byte(dev, 0x8D, 0xB7);
> +	pci_write_config_byte(dev, 0xB7, disable | 0x02);
> +	pci_write_config_byte(dev, 0x8E, write_enable);
> +	pci_write_config_byte(dev, 0x8D, write_target);
> +}
> +
> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_RICOH,
> +			 PCI_DEVICE_ID_RICOH_RL5C476,
> +			 quirk_ricoh_rl5c476_mmc_disable);
> +DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH,
> +			       PCI_DEVICE_ID_RICOH_RL5C476,
> +			       quirk_ricoh_rl5c476_mmc_disable);
> +
> +static void quirk_ricoh_rl5c832_mmc_disable(struct pci_dev *dev)
> +{
> +	u8 disable;
> +	u8 write_enable;
> +
> +	pci_read_config_byte(dev, 0xCB, &disable);
> +
> +	if (disable & 0x02)
> +		return;
> +
> +	pci_read_config_byte(dev, 0xCA, &write_enable);
> +	pci_write_config_byte(dev, 0xCA, 0x57);
> +	pci_write_config_byte(dev, 0xCB, disable | 0x02);
> +	pci_write_config_byte(dev, 0xCA, write_enable);
> +}
> +
> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_RICOH,
> +			 PCI_DEVICE_ID_RICOH_RL5C476,
> +			 quirk_ricoh_rl5c832_mmc_disable);
> +DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH,
> +			       PCI_DEVICE_ID_RICOH_RL5C476,
> +			       quirk_ricoh_rl5c832_mmc_disable);
> +
>  #ifdef CONFIG_PCI_MSI
>  /* Some chipsets do not support MSI. We cannot easily rely on setting
>   * PCI_BUS_FLAGS_NO_MSI in its bus flags because there are actually

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