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Message-Id: <200811140241.27028.elendil@planet.nl>
Date: Fri, 14 Nov 2008 02:41:25 +0100
From: Frans Pop <elendil@...net.nl>
To: Matthew Garrett <mjg59@...f.ucam.org>
Cc: linux-kernel@...r.kernel.org, drzeus-mmc@...eus.cx,
linux-pm@...ts.linux-foundation.org
Subject: Re: sdhci: Loads of scary messages during suspend/resume with SD card inserted
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@...mni.utexas.net>");
> -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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