ARM: S5P6440: Add IRQ support

This patch adds IRQ support for S5P6440 CPU.

Signed-off-by: Adityapratap Sharma <aditya.ps@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 73 insertions, 0 deletions

diff --git a/arch/arm/plat-s5p/irq.c b/arch/arm/plat-s5p/irq.c
new file mode 100644
index 000000000000..eada40d0847d
--- /dev/null
+++ b/arch/arm/plat-s5p/irq.c
@@ -0,0 +1,73 @@
+/* arch/arm/plat-s5p/irq.c
+ *
+ * Copyright (c) 2009 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com/
+ *
+ * S5P - Interrupt handling
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+
+#include <asm/hardware/vic.h>
+
+#include <linux/serial_core.h>
+#include <mach/map.h>
+#include <plat/regs-timer.h>
+#include <plat/regs-serial.h>
+#include <plat/cpu.h>
+#include <plat/irq-vic-timer.h>
+#include <plat/irq-uart.h>
+
+#define VIC_VAADDR(no)	(S5P_VA_VIC0   + ((no)*0x10000))
+#define VIC_BASE(no)	(S5P_VIC0_BASE + ((no)*32))
+
+/*
+ * Note, we make use of the fact that the parent IRQs, IRQ_UART[0..3]
+ * are consecutive when looking up the interrupt in the demux routines.
+ */
+static struct s3c_uart_irq uart_irqs[] = {
+	[0] = {
+		.regs		= S5P_VA_UART0,
+		.base_irq	= IRQ_S5P_UART_BASE0,
+		.parent_irq	= IRQ_UART0,
+	},
+	[1] = {
+		.regs		= S5P_VA_UART1,
+		.base_irq	= IRQ_S5P_UART_BASE1,
+		.parent_irq	= IRQ_UART1,
+	},
+	[2] = {
+		.regs		= S5P_VA_UART2,
+		.base_irq	= IRQ_S5P_UART_BASE2,
+		.parent_irq	= IRQ_UART2,
+	},
+	[3] = {
+		.regs		= S5P_VA_UART3,
+		.base_irq	= IRQ_S5P_UART_BASE3,
+		.parent_irq	= IRQ_UART3,
+	},
+};
+
+void __init s5p_init_irq(u32 *vic, u32 num_vic)
+{
+	int irq;
+
+	/* initialize the VICs */
+	for (irq = 0; irq < num_vic; irq++)
+		vic_init(VIC_VAADDR(irq), VIC_BASE(irq), vic[irq], 0);
+
+	s3c_init_vic_timer_irq(IRQ_TIMER0_VIC, IRQ_TIMER0);
+	s3c_init_vic_timer_irq(IRQ_TIMER1_VIC, IRQ_TIMER1);
+	s3c_init_vic_timer_irq(IRQ_TIMER2_VIC, IRQ_TIMER2);
+	s3c_init_vic_timer_irq(IRQ_TIMER3_VIC, IRQ_TIMER3);
+	s3c_init_vic_timer_irq(IRQ_TIMER4_VIC, IRQ_TIMER4);
+
+	s3c_init_uart_irqs(uart_irqs, ARRAY_SIZE(uart_irqs));
+}