diff options
| author | Pierre Ossman <drzeus@drzeus.cx> | 2006-06-30 02:22:29 -0700 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-07-02 16:54:53 +0100 |
| commit | 4a9655051fb1efa568e53baf5dfb21e33bad6bf6 (patch) | |
| tree | 4cafaf33d3d9c821f39c3604ebdeeb85c5b911ef | |
| parent | fd2208d7c72ef5995b730f1e23b082261499e334 (diff) | |
| download | lwn-4a9655051fb1efa568e53baf5dfb21e33bad6bf6.tar.gz lwn-4a9655051fb1efa568e53baf5dfb21e33bad6bf6.zip | |
[MMC] sdhci: check controller version
Check the interface version of the controller and bail out if it's an unknown
version.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | drivers/mmc/sdhci.c | 11 | ||||
| -rw-r--r-- | 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 5324eae6d720..e37c8149249f 100644 --- a/drivers/mmc/sdhci.c +++ b/drivers/mmc/sdhci.c @@ -1073,6 +1073,7 @@ static int sdhci_resume (struct pci_dev *pdev) 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(struct pci_dev *pdev, int slot) 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 b1aa3acf0906..758cf1c24364 100644 --- a/drivers/mmc/sdhci.h +++ b/drivers/mmc/sdhci.h @@ -149,6 +149,10 @@ #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; |