edac: mv64x60 add pci fixup

Fixup of missing bit 0 on 64360 PCIx_ERR_MASK and errata FEr-#11 and
FEr-#16 for the 64460.  Bit 0 must remain 0.

Signed-off-by: Dave Jiang <djiang@mvista.com>
Signed-off-by: Doug Thompson <dougthompson.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 35 insertions, 0 deletions

diff --git a/drivers/edac/mv64x60_edac.c b/drivers/edac/mv64x60_edac.c
index de69163ff5b3..083ce8d0c63d 100644
--- a/drivers/edac/mv64x60_edac.c
+++ b/drivers/edac/mv64x60_edac.c
@@ -71,6 +71,35 @@ static irqreturn_t mv64x60_pci_isr(int irq, void *dev_id)
         return IRQ_HANDLED;
 }
 
+/*
+ * Bit 0 of MV64x60_PCIx_ERR_MASK does not exist on the 64360 and because of
+ * errata FEr-#11 and FEr-##16 for the 64460, it should be 0 on that chip as
+ * well.  IOW, don't set bit 0.
+ */
+
+/* Erratum FEr PCI-#16: clear bit 0 of PCI SERRn Mask reg. */
+static int __init mv64x60_pci_fixup(struct platform_device *pdev)
+{
+        struct resource *r;
+        void __iomem *pci_serr;
+
+        r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+        if (!r) {
+                printk(KERN_ERR "%s: Unable to get resource for "
+                       "PCI err regs\n", __func__);
+                return -ENOENT;
+        }
+
+        pci_serr = ioremap(r->start, r->end - r->start + 1);
+        if (!pci_serr)
+                return -ENOMEM;
+
+        out_le32(pci_serr, in_le32(pci_serr) & ~0x1);
+        iounmap(pci_serr);
+
+        return 0;
+}
+
 static int __devinit mv64x60_pci_err_probe(struct platform_device *pdev)
 {
         struct edac_pci_ctl_info *pci;
@@ -128,6 +157,12 @@ static int __devinit mv64x60_pci_err_probe(struct platform_device *pdev)
                 goto err;
         }
 
+        res = mv64x60_pci_fixup(pdev);
+        if (res < 0) {
+                printk(KERN_ERR "%s: PCI fixup failed\n", __func__);
+                goto err;
+        }
+
         out_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_CAUSE, 0);
         out_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_MASK, 0);
         out_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_MASK,