linux-kernel - [PATCH 13/13] EDAC mv64x60 add pci fixup

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Date:	Fri, 27 Jun 2008 12:13:53 -0600
From:	dougthompson@...ssion.com
To:	bluesmoke-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: [PATCH 13/13] 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@...sta.com>

Index: 2.6.26-rc5-mm3/drivers/edac/mv64x60_edac.c
===================================================================
--- 2.6.26-rc5-mm3.orig/drivers/edac/mv64x60_edac.c
+++ 2.6.26-rc5-mm3/drivers/edac/mv64x60_edac.c
@@ -71,6 +71,35 @@ static irqreturn_t mv64x60_pci_isr(int i
 	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_pro
 		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,
--
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