[PATCH] powerpc: setup Marvell mv64x60 platform devices for EDAC

[Dave Jiang]

Creating platform devices (memory controller, sram error registers, cpu error
registers, PCI error registers) for Error Detection and Correction (EDAC)
driver on the Marvell mv64x60 based platforms.

The platform devices allow the mv64x60 EDAC driver to detect errors from the
memory controller (ECC erorrs), SRAM controller, CPU data path error registers,
and PCI error registers. The errors are reported to syslog. Software ECC
scrubbing is provided. These replace the mv64x60 error handlers in the ppc branch
They are being moved to EDAC subsystem in order to centralize error reporting. 

The error reporting can be triggered via interrupts from the mv64x60 bridge chip
or via polling mechanism provided by the EDAC core code.

The mv64x60 EDAC driver can be found at:
http://bluesmoke.sourceforge.net/

It's in development to be pushed into the kernel.

Signed-off-by: Dave Jiang <djiang at mvista.com>

---

 arch/powerpc/sysdev/mv64x60_dev.c |  183 +++++++++++++++++++++++++++++++++++++
 1 files changed, 183 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/sysdev/mv64x60_dev.c b/arch/powerpc/sysdev/mv64x60_dev.c
index 4b0a9c8..ce37ab8 100644
--- a/arch/powerpc/sysdev/mv64x60_dev.c
+++ b/arch/powerpc/sysdev/mv64x60_dev.c
@@ -16,6 +16,7 @@
 #include <linux/platform_device.h>
 
 #include <asm/prom.h>
+#include <asm/io.h>
 
 /*
  * These functions provide the necessary setup for the mv64x60 drivers.
@@ -389,6 +390,154 @@ error:
 	return err;
 }
 
+/*
+ * Platform device setup for EDAC memory controller
+ */
+static int __init mv64x60_mem_ctrl_init(struct device_node *np, int id)
+{
+	struct resource r[2];
+	struct platform_device *pdev;
+	int ret;
+
+	memset(r, 0, sizeof(r));
+
+	ret = of_address_to_resource(np, 0, &r[0]);
+	if (ret)
+		goto err;
+
+	of_irq_to_resource(np, 0, &r[1]);
+
+	pdev = platform_device_register_simple("mv64x60_mc_err", id, r, 2);
+	if (IS_ERR(pdev))
+		return PTR_ERR(pdev);
+
+	return 0;
+
+err:
+	return ret;
+}
+
+/*
+ * Platform device setup for EDAC CPU errors
+ */
+static int __init mv64x60_cpu_error_init(struct device_node *np, int id)
+{
+	struct resource r[3];
+	struct platform_device *pdev;
+	int ret;
+
+	memset(r, 0, sizeof(r));
+
+	ret = of_address_to_resource(np, 0, &r[0]);
+	if (ret)
+		goto err;
+
+	ret = of_address_to_resource(np, 1, &r[1]);
+	if (ret)
+		goto err;
+
+	of_irq_to_resource(np, 0, &r[2]);
+
+	pdev = platform_device_register_simple("mv64x60_cpu_err", id, r, 3);
+	if (IS_ERR(pdev))
+		return PTR_ERR(pdev);
+
+	return 0;
+
+err:
+	return ret;
+}
+
+/*
+ * Platform device setup for EDAC SRAM errors
+ */
+static int __init mv64x60_sram_ctrl_init(struct device_node *np, int id)
+{
+	struct resource r[2];
+	struct platform_device *pdev;
+	int ret;
+
+	memset(r, 0, sizeof(r));
+
+	ret = of_address_to_resource(np, 0, &r[0]);
+	if (ret)
+		goto err;
+
+	of_irq_to_resource(np, 0, &r[1]);
+
+	pdev = platform_device_register_simple("mv64x60_sram_err", id, r, 2);
+	if (IS_ERR(pdev))
+		return PTR_ERR(pdev);
+
+	return 0;
+
+err:
+	return ret;
+}
+
+#ifdef CONFIG_PCI
+/*
+ * 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.
+ */
+#define MV64X60_PCIx_ERR_MASK_VAL	0x00a50c24
+
+/* Erratum FEr PCI-#16: clear bit 0 of PCI SERRn Mask reg. */
+static int __init mv64x60_pci_fixup(struct device_node *np)
+{
+	struct resource res;
+	void __iomem *pci_serr;
+	int ret;
+
+	ret = of_address_to_resource(np, 1, &res);
+	if (ret)
+		return ret;
+
+	pci_serr = ioremap(res.start, res.end - res.start + 1);
+	if (!pci_serr)
+		return -ENOMEM;
+
+	out_le32(pci_serr, in_le32(pci_serr) & ~0x1);
+	iounmap(pci_serr);
+
+	return 0;
+}
+
+/*
+ * Platform device setup for EDAC PCI errors
+ */
+static int __init mv64x60_pci_error_init(struct device_node *np, int id)
+{
+	struct resource r[2];
+	struct platform_device *pdev;
+	int ret;
+
+	memset(r, 0, sizeof(r));
+
+	ret = mv64x60_pci_fixup(np);
+	if (ret)
+		goto err;
+
+	ret = of_address_to_resource(np, 0, &r[0]);
+	if (ret)
+		goto err;
+
+	of_irq_to_resource(np, 0, &r[1]);
+
+	pdev = platform_device_register_simple("mv64x60_pci_err", id, r, 2);
+	if (IS_ERR(pdev)) {
+		ret = PTR_ERR(pdev);
+		goto err;
+	}
+
+	return 0;
+
+err:
+	return ret;
+}
+#endif	/* CONFIG_PCI */
+
 static int __init mv64x60_device_setup(void)
 {
 	struct device_node *np = NULL;
@@ -413,6 +562,40 @@ static int __init mv64x60_device_setup(void)
 		if ((err = mv64x60_i2c_device_setup(np, id)))
 			goto error;
 
+	for (id = 0;
+	     (np = of_find_compatible_node(np, 
+					   NULL, 
+					   "marvell,mv64x60-mem-ctrl"));
+	     id++)
+		if ((err = mv64x60_mem_ctrl_init(np, id)))
+			goto error;
+
+	for (id = 0;
+	     (np = of_find_compatible_node(np, 
+					   NULL, 
+					   "marvell,mv64x60-cpu-error"));
+	     id++)
+		if ((err = mv64x60_cpu_error_init(np, id)))
+			goto error;
+
+	for (id = 0;
+	     (np = of_find_compatible_node(np, 
+					   NULL, 
+					   "marvell,mv64x60-sram-ctrl"));
+	     id++)
+		if ((err = mv64x60_sram_ctrl_init(np, id)))
+			goto error;
+
+#ifdef CONFIG_PCI
+	for (id = 0;
+	     (np = of_find_compatible_node(np, 
+					   NULL, 
+					   "marvell,mv64x60-pci-error"));
+	     id++)
+		if ((err = mv64x60_pci_error_init(np, id)))
+			goto error;
+#endif
+
 	return 0;
 
 error: