Messages in this thread Patch in this message | | | From | Pierre Ossman <> | Subject | [PATCH 13/21] [MMC] Check controller version | Date | Wed, 21 Jun 2006 16:26:18 +0200 |
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Check the interface version of the controller and bail out if it's an unknown version.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx> ---
drivers/mmc/sdhci.c | 11 +++++++++++ drivers/mmc/sdhci.h | 4 ++++ 2 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c index 41addde..0c19e27 100644 --- a/drivers/mmc/sdhci.c +++ b/drivers/mmc/sdhci.c @@ -1073,6 +1073,7 @@ #endif /* CONFIG_PM */ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot) { int ret; + unsigned int version; struct sdhci_chip *chip; struct mmc_host *mmc; struct sdhci_host *host; @@ -1131,6 +1132,16 @@ static int __devinit sdhci_probe_slot(st goto release; } + version = readw(host->ioaddr + SDHCI_HOST_VERSION); + version = (version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT; + if (version != 0) { + printk(KERN_ERR "%s: Unknown controller version (%d). " + "Cowardly refusing to continue.\n", host->slot_descr, + version); + ret = -ENODEV; + goto unmap; + } + caps = readl(host->ioaddr + SDHCI_CAPABILITIES); if ((caps & SDHCI_CAN_DO_DMA) && ((pdev->class & 0x0000FF) == 0x01)) diff --git a/drivers/mmc/sdhci.h b/drivers/mmc/sdhci.h index b1aa3ac..758cf1c 100644 --- a/drivers/mmc/sdhci.h +++ b/drivers/mmc/sdhci.h @@ -149,6 +149,10 @@ #define SDHCI_MAX_CURRENT 0x48 #define SDHCI_SLOT_INT_STATUS 0xFC #define SDHCI_HOST_VERSION 0xFE +#define SDHCI_VENDOR_VER_MASK 0xFF00 +#define SDHCI_VENDOR_VER_SHIFT 8 +#define SDHCI_SPEC_VER_MASK 0x00FF +#define SDHCI_SPEC_VER_SHIFT 0 struct sdhci_chip; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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