4 files changed, 93 insertions, 1 deletions

diff --git a/arch/sh/boards/mach-sdk7786/Makefile b/arch/sh/boards/mach-sdk7786/Makefile
index 23ff7d4ac491..8ae56e9560ac 100644
--- a/arch/sh/boards/mach-sdk7786/Makefile
+++ b/arch/sh/boards/mach-sdk7786/Makefile
@@ -1,4 +1,4 @@
-obj-y   := fpga.o irq.o setup.o
+obj-y   := fpga.o irq.o nmi.o setup.o
 
 obj-$(CONFIG_GENERIC_GPIO)      += gpio.o
 obj-$(CONFIG_HAVE_SRAM_POOL)    += sram.o
diff --git a/arch/sh/boards/mach-sdk7786/nmi.c b/arch/sh/boards/mach-sdk7786/nmi.c
new file mode 100644
index 000000000000..edcfa1f568ba
--- /dev/null
+++ b/arch/sh/boards/mach-sdk7786/nmi.c
@@ -0,0 +1,83 @@
+/*
+ * SDK7786 FPGA NMI Support.
+ *
+ * Copyright (C) 2010  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <mach/fpga.h>
+
+enum {
+        NMI_MODE_MANUAL,
+        NMI_MODE_AUX,
+        NMI_MODE_MASKED,
+        NMI_MODE_ANY,
+        NMI_MODE_UNKNOWN,
+};
+
+/*
+ * Default to the manual NMI switch.
+ */
+static unsigned int __initdata nmi_mode = NMI_MODE_ANY;
+
+static int __init nmi_mode_setup(char *str)
+{
+        if (!str)
+                return 0;
+
+        if (strcmp(str, "manual") == 0)
+                nmi_mode = NMI_MODE_MANUAL;
+        else if (strcmp(str, "aux") == 0)
+                nmi_mode = NMI_MODE_AUX;
+        else if (strcmp(str, "masked") == 0)
+                nmi_mode = NMI_MODE_MASKED;
+        else if (strcmp(str, "any") == 0)
+                nmi_mode = NMI_MODE_ANY;
+        else {
+                nmi_mode = NMI_MODE_UNKNOWN;
+                pr_warning("Unknown NMI mode %s\n", str);
+        }
+
+        printk("Set NMI mode to %d\n", nmi_mode);
+        return 0;
+}
+early_param("nmi_mode", nmi_mode_setup);
+
+void __init sdk7786_nmi_init(void)
+{
+        unsigned int source, mask, tmp;
+
+        switch (nmi_mode) {
+        case NMI_MODE_MANUAL:
+                source = NMISR_MAN_NMI;
+                mask = NMIMR_MAN_NMIM;
+                break;
+        case NMI_MODE_AUX:
+                source = NMISR_AUX_NMI;
+                mask = NMIMR_AUX_NMIM;
+                break;
+        case NMI_MODE_ANY:
+                source = NMISR_MAN_NMI | NMISR_AUX_NMI;
+                mask = NMIMR_MAN_NMIM | NMIMR_AUX_NMIM;
+                break;
+        case NMI_MODE_MASKED:
+        case NMI_MODE_UNKNOWN:
+        default:
+                source = mask = 0;
+                break;
+        }
+
+        /* Set the NMI source */
+        tmp = fpga_read_reg(NMISR);
+        tmp &= ~NMISR_MASK;
+        tmp |= source;
+        fpga_write_reg(tmp, NMISR);
+
+        /* And the IRQ masking */
+        fpga_write_reg(NMIMR_MASK ^ mask, NMIMR);
+}
diff --git a/arch/sh/boards/mach-sdk7786/setup.c b/arch/sh/boards/mach-sdk7786/setup.c
index 7e0c4e3878e0..75e4ddbbec3e 100644
--- a/arch/sh/boards/mach-sdk7786/setup.c
+++ b/arch/sh/boards/mach-sdk7786/setup.c
@@ -237,6 +237,7 @@ static void __init sdk7786_setup(char **cmdline_p)
         pr_info("Renesas Technology Europe SDK7786 support:\n");
 
         sdk7786_fpga_init();
+        sdk7786_nmi_init();
 
         pr_info("\tPCB revision:\t%d\n", fpga_read_reg(PCBRR) & 0xf);
 
diff --git a/arch/sh/include/mach-sdk7786/mach/fpga.h b/arch/sh/include/mach-sdk7786/mach/fpga.h
index 40f0c2d3690c..a9cdac469927 100644
--- a/arch/sh/include/mach-sdk7786/mach/fpga.h
+++ b/arch/sh/include/mach-sdk7786/mach/fpga.h
@@ -14,11 +14,16 @@
 #define INTTESTR        0x040
 #define SYSSR           0x050
 #define NRGPR           0x060
+
 #define NMISR           0x070
+#define  NMISR_MAN_NMI  BIT(0)
+#define  NMISR_AUX_NMI  BIT(1)
+#define  NMISR_MASK     (NMISR_MAN_NMI | NMISR_AUX_NMI)
 
 #define NMIMR           0x080
 #define  NMIMR_MAN_NMIM BIT(0)  /* Manual NMI mask */
 #define  NMIMR_AUX_NMIM BIT(1)  /* Auxiliary NMI mask */
+#define  NMIMR_MASK     (NMIMR_MAN_NMIM | NMIMR_AUX_NMIM)
 
 #define INTBSR          0x090
 #define INTBMR          0x0a0
@@ -126,6 +131,9 @@
 extern void __iomem *sdk7786_fpga_base;
 extern void sdk7786_fpga_init(void);
 
+/* arch/sh/boards/mach-sdk7786/nmi.c */
+extern void sdk7786_nmi_init(void);
+
 #define SDK7786_FPGA_REGADDR(reg)       (sdk7786_fpga_base + (reg))
 
 /*