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Diffstat (limited to 'arch/m68knommu/platform/coldfire/intc-simr.c')
-rw-r--r--arch/m68knommu/platform/coldfire/intc-simr.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/m68knommu/platform/coldfire/intc-simr.c b/arch/m68knommu/platform/coldfire/intc-simr.c
new file mode 100644
index 00000000000..1b01e79c2f6
--- /dev/null
+++ b/arch/m68knommu/platform/coldfire/intc-simr.c
@@ -0,0 +1,78 @@
+/*
+ * intc-simr.c
+ *
+ * (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com>
+ *
+ * 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/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+#include <asm/traps.h>
+
+static void intc_irq_mask(unsigned int irq)
+{
+ if (irq >= MCFINT_VECBASE) {
+ if (irq < MCFINT_VECBASE + 64)
+ __raw_writeb(irq - MCFINT_VECBASE, MCFINTC0_SIMR);
+ else if ((irq < MCFINT_VECBASE + 128) && MCFINTC1_SIMR)
+ __raw_writeb(irq - MCFINT_VECBASE - 64, MCFINTC1_SIMR);
+ }
+}
+
+static void intc_irq_unmask(unsigned int irq)
+{
+ if (irq >= MCFINT_VECBASE) {
+ if (irq < MCFINT_VECBASE + 64)
+ __raw_writeb(irq - MCFINT_VECBASE, MCFINTC0_CIMR);
+ else if ((irq < MCFINT_VECBASE + 128) && MCFINTC1_CIMR)
+ __raw_writeb(irq - MCFINT_VECBASE - 64, MCFINTC1_CIMR);
+ }
+}
+
+static int intc_irq_set_type(unsigned int irq, unsigned int type)
+{
+ if (irq >= MCFINT_VECBASE) {
+ if (irq < MCFINT_VECBASE + 64)
+ __raw_writeb(5, MCFINTC0_ICR0 + irq - MCFINT_VECBASE);
+ else if ((irq < MCFINT_VECBASE) && MCFINTC1_ICR0)
+ __raw_writeb(5, MCFINTC1_ICR0 + irq - MCFINT_VECBASE - 64);
+ }
+ return 0;
+}
+
+static struct irq_chip intc_irq_chip = {
+ .name = "CF-INTC",
+ .mask = intc_irq_mask,
+ .unmask = intc_irq_unmask,
+ .set_type = intc_irq_set_type,
+};
+
+void __init init_IRQ(void)
+{
+ int irq;
+
+ init_vectors();
+
+ /* Mask all interrupt sources */
+ __raw_writeb(0xff, MCFINTC0_SIMR);
+ if (MCFINTC1_SIMR)
+ __raw_writeb(0xff, MCFINTC1_SIMR);
+
+ for (irq = 0; (irq < NR_IRQS); irq++) {
+ irq_desc[irq].status = IRQ_DISABLED;
+ irq_desc[irq].action = NULL;
+ irq_desc[irq].depth = 1;
+ irq_desc[irq].chip = &intc_irq_chip;
+ intc_irq_set_type(irq, 0);
+ }
+}
+