ARM: Introduce plat-tcc irq framework
Introduce lowlevel interrupt routines.
Signed-off-by: "Hans J. Koch" <hjk@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/arm/mach-tcc8k/irq.c b/arch/arm/mach-tcc8k/irq.c
new file mode 100644
index 0000000..34575c4
--- /dev/null
+++ b/arch/arm/mach-tcc8k/irq.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) Telechips, Inc.
+ * Copyright (C) 2009-2010 Hans J. Koch <hjk@linutronix.de>
+ *
+ * Licensed under the terms of the GNU GPL version 2.
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+
+#include <mach/tcc8k-regs.h>
+#include <mach/irqs.h>
+
+#include "common.h"
+
+/* Disable IRQ */
+static void tcc8000_mask_ack_irq0(unsigned int irq)
+{
+ PIC0_IEN &= ~(1 << irq);
+ PIC0_CREQ |= (1 << irq);
+}
+
+static void tcc8000_mask_ack_irq1(unsigned int irq)
+{
+ PIC1_IEN &= ~(1 << (irq - 32));
+ PIC1_CREQ |= (1 << (irq - 32));
+}
+
+static void tcc8000_mask_irq0(unsigned int irq)
+{
+ PIC0_IEN &= ~(1 << irq);
+}
+
+static void tcc8000_mask_irq1(unsigned int irq)
+{
+ PIC1_IEN &= ~(1 << (irq - 32));
+}
+
+static void tcc8000_ack_irq0(unsigned int irq)
+{
+ PIC0_CREQ |= (1 << irq);
+}
+
+static void tcc8000_ack_irq1(unsigned int irq)
+{
+ PIC1_CREQ |= (1 << (irq - 32));
+}
+
+/* Enable IRQ */
+static void tcc8000_unmask_irq0(unsigned int irq)
+{
+ PIC0_IEN |= (1 << irq);
+ PIC0_INTOEN |= (1 << irq);
+}
+
+static void tcc8000_unmask_irq1(unsigned int irq)
+{
+ PIC1_IEN |= (1 << (irq - 32));
+ PIC1_INTOEN |= (1 << (irq - 32));
+}
+
+static struct irq_chip tcc8000_irq_chip0 = {
+ .name = "tcc_irq0",
+ .mask = tcc8000_mask_irq0,
+ .ack = tcc8000_ack_irq0,
+ .mask_ack = tcc8000_mask_ack_irq0,
+ .unmask = tcc8000_unmask_irq0,
+};
+
+static struct irq_chip tcc8000_irq_chip1 = {
+ .name = "tcc_irq1",
+ .mask = tcc8000_mask_irq1,
+ .ack = tcc8000_ack_irq1,
+ .mask_ack = tcc8000_mask_ack_irq1,
+ .unmask = tcc8000_unmask_irq1,
+};
+
+void __init tcc8k_init_irq(void)
+{
+ int irqno;
+
+ /* Mask and clear all interrupts */
+ PIC0_IEN = 0x00000000;
+ PIC0_CREQ = 0xffffffff;
+ PIC1_IEN = 0x00000000;
+ PIC1_CREQ = 0xffffffff;
+
+ PIC0_MEN0 = 0x00000003;
+ PIC1_MEN1 = 0x00000003;
+ PIC1_MEN = 0x00000003;
+
+ /* let all IRQs be level triggered */
+ PIC0_TMODE = 0xffffffff;
+ PIC1_TMODE = 0xffffffff;
+ /* all IRQs are IRQs (not FIQs) */
+ PIC0_IRQSEL = 0xffffffff;
+ PIC1_IRQSEL = 0xffffffff;
+
+ for (irqno = 0; irqno < NR_IRQS; irqno++) {
+ if (irqno < 32)
+ set_irq_chip(irqno, &tcc8000_irq_chip0);
+ else
+ set_irq_chip(irqno, &tcc8000_irq_chip1);
+ set_irq_handler(irqno, handle_level_irq);
+ set_irq_flags(irqno, IRQF_VALID);
+ }
+}