1 files changed, 48 insertions, 0 deletions
diff --git a/arch/m68k/apollo/dn_ints.c b/arch/m68k/apollo/dn_ints.c
new file mode 100644
index 0000000000..02cff7efc8
--- /dev/null
+++ b/arch/m68k/apollo/dn_ints.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+
+#include <asm/traps.h>
+#include <asm/apollohw.h>
+
+unsigned int apollo_irq_startup(struct irq_data *data)
+{
+	unsigned int irq = data->irq;
+
+	if (irq < 8)
+		*(volatile unsigned char *)(pica+1) &= ~(1 << irq);
+	else
+		*(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
+	return 0;
+}
+
+void apollo_irq_shutdown(struct irq_data *data)
+{
+	unsigned int irq = data->irq;
+
+	if (irq < 8)
+		*(volatile unsigned char *)(pica+1) |= (1 << irq);
+	else
+		*(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
+}
+
+void apollo_irq_eoi(struct irq_data *data)
+{
+	*(volatile unsigned char *)(pica) = 0x20;
+	*(volatile unsigned char *)(picb) = 0x20;
+}
+
+static struct irq_chip apollo_irq_chip = {
+	.name           = "apollo",
+	.irq_startup    = apollo_irq_startup,
+	.irq_shutdown   = apollo_irq_shutdown,
+	.irq_eoi	= apollo_irq_eoi,
+};
+
+
+void __init dn_init_IRQ(void)
+{
+	m68k_setup_user_interrupt(VEC_USER + 96, 16);
+	m68k_setup_irq_controller(&apollo_irq_chip, handle_fasteoi_irq,
+				  IRQ_APOLLO, 16);
+}