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authorPierre Ossman <drzeus@drzeus.cx>2006-06-30 02:22:29 -0700
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-07-02 16:54:53 +0100
commit4a9655051fb1efa568e53baf5dfb21e33bad6bf6 (patch)
tree4cafaf33d3d9c821f39c3604ebdeeb85c5b911ef /drivers/mmc
parentfd2208d7c72ef5995b730f1e23b082261499e334 (diff)
[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>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/sdhci.c11
-rw-r--r--drivers/mmc/sdhci.h4
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 5324eae6d72..e37c8149249 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 b1aa3acf090..758cf1c2436 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;