On Thu, 3 Jun 2010 04:16:27 +0300 Maxim Levitsky <maximlevit...@gmail.com> wrote:
> The current way of disabling it is not well tested by vendor > and has all kinds of bugs that show up on resume from ram/disk. > > Old way of disabling is still supported by > continuing to use CONFIG_MMC_RICOH_MMC. > > Based on > 'http://list.drzeus.cx/pipermail/sdhci-devel/2007-December/002085.html' As long as this doesn't limit the performance of MMC cards, I can't complain. BTW, the new PCIe native controllers from Ricoh don't require the MMC controller to be disabled - the SD controller sees the cards by default; I guess some bit has to be twiddled by the MMC driver. > Signed-off-by: Maxim Levitsky <maximlevit...@gmail.com> > CC: adq_...@lidskialf.net > CC: linux-mmc@vger.kernel.org <linux-mmc@vger.kernel.org> > --- > drivers/mmc/host/sdhci-pci.c | 34 > ++++++++++++++++++++++++++++++++++ drivers/mmc/host/sdhci.c | > 5 ++++- drivers/mmc/host/sdhci.h | 2 ++ > 3 files changed, 40 insertions(+), 1 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-pci.c > b/drivers/mmc/host/sdhci-pci.c index 65483fd..3843780 100644 > --- a/drivers/mmc/host/sdhci-pci.c > +++ b/drivers/mmc/host/sdhci-pci.c > @@ -17,6 +17,7 @@ > #include <linux/pci.h> > #include <linux/dma-mapping.h> > #include <linux/slab.h> > +#include <linux/device.h> > > #include <linux/mmc/host.h> > > @@ -85,6 +86,26 @@ static int ricoh_probe(struct sdhci_pci_chip *chip) > chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SONY) > chip->quirks |= SDHCI_QUIRK_NO_CARD_NO_RESET; > > + /* To disable hardware races against MMC part */ > + device_disable_async_suspend(&chip->pci_dev->dev); > + return 0; > +} It would be nice if this could be more selective so it only happens if it's really needed. > + > +static int ricoh_mmc_probe_slot(struct sdhci_pci_slot *slot) > +{ > + slot->host->caps = > + ((0x21 << SDHCI_TIMEOUT_CLK_SHIFT) > + & SDHCI_TIMEOUT_CLK_MASK) | > + > + ((0x21 << SDHCI_CLOCK_BASE_SHIFT) > + & SDHCI_CLOCK_BASE_MASK) | > + > + SDHCI_TIMEOUT_CLK_UNIT | > + SDHCI_CAN_VDD_330 | > + SDHCI_CAN_DO_SDMA ; Have you been able to establish if 4bit and high-speed operations work correctly through the MMC controller? I note that you didn't set SDHCI_CAN_DO_HISPD. > + > + /* To disable hardware races against SDHC part */ > + device_disable_async_suspend(&slot->chip->pci_dev->dev); > return 0; > } > > @@ -95,6 +116,11 @@ static const struct sdhci_pci_fixes sdhci_ricoh = > { SDHCI_QUIRK_CLOCK_BEFORE_RESET, > }; > > +static const struct sdhci_pci_fixes sdhci_ricoh_mmc = { > + .probe_slot = ricoh_mmc_probe_slot, > + .quirks = SDHCI_QUIRK_NO_CARD_NO_RESET, > +}; > + > static const struct sdhci_pci_fixes sdhci_ene_712 = { > .quirks = SDHCI_QUIRK_SINGLE_POWER_WRITE | > SDHCI_QUIRK_BROKEN_DMA, > @@ -374,6 +400,14 @@ static const struct pci_device_id pci_ids[] > __devinitdata = { }, > > { > + .vendor = PCI_VENDOR_ID_RICOH, > + .device = 0x843, > + .subvendor = PCI_ANY_ID, > + .subdevice = PCI_ANY_ID, > + .driver_data = (kernel_ulong_t)&sdhci_ricoh_mmc, > + }, > + > + { > .vendor = PCI_VENDOR_ID_ENE, > .device = PCI_DEVICE_ID_ENE_CB712_SD, > .subvendor = PCI_ANY_ID, > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c > index c6d1bd8..dbd9367 100644 > --- a/drivers/mmc/host/sdhci.c > +++ b/drivers/mmc/host/sdhci.c > @@ -1687,7 +1687,10 @@ int sdhci_add_host(struct sdhci_host *host) > host->version); > } > > - caps = sdhci_readl(host, SDHCI_CAPABILITIES); > + if (host->caps) > + caps = host->caps; > + else > + caps = sdhci_readl(host, SDHCI_CAPABILITIES); I'd prefer keying this off an explicit quirk. > > if (host->quirks & SDHCI_QUIRK_FORCE_DMA) > host->flags |= SDHCI_USE_SDMA; > diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h > index c846813..b41581a 100644 > --- a/drivers/mmc/host/sdhci.h > +++ b/drivers/mmc/host/sdhci.h > @@ -292,6 +292,8 @@ struct sdhci_host { > > struct timer_list timer; /* Timer for > timeouts */ > + unsigned int caps; /* > Alternative capabilities */ + > unsigned long private[0] > ____cacheline_aligned; }; > --phil -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
