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Diffstat (limited to 'kernel/arch/sh/boards/mach-se/7780/irq.c')
-rw-r--r--kernel/arch/sh/boards/mach-se/7780/irq.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/kernel/arch/sh/boards/mach-se/7780/irq.c b/kernel/arch/sh/boards/mach-se/7780/irq.c
new file mode 100644
index 000000000..d5c9edc17
--- /dev/null
+++ b/kernel/arch/sh/boards/mach-se/7780/irq.c
@@ -0,0 +1,68 @@
+/*
+ * linux/arch/sh/boards/se/7780/irq.c
+ *
+ * Copyright (C) 2006,2007 Nobuhiro Iwamatsu
+ *
+ * Hitachi UL SolutionEngine 7780 Support.
+ *
+ * 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/irq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <mach-se/mach/se7780.h>
+
+#define INTC_BASE 0xffd00000
+#define INTC_ICR1 (INTC_BASE+0x1c)
+
+/*
+ * Initialize IRQ setting
+ */
+void __init init_se7780_IRQ(void)
+{
+ /* enable all interrupt at FPGA */
+ __raw_writew(0, FPGA_INTMSK1);
+ /* mask SM501 interrupt */
+ __raw_writew((__raw_readw(FPGA_INTMSK1) | 0x0002), FPGA_INTMSK1);
+ /* enable all interrupt at FPGA */
+ __raw_writew(0, FPGA_INTMSK2);
+
+ /* set FPGA INTSEL register */
+ /* FPGA + 0x06 */
+ __raw_writew( ((IRQPIN_SM501 << IRQPOS_SM501) |
+ (IRQPIN_SMC91CX << IRQPOS_SMC91CX)), FPGA_INTSEL1);
+
+ /* FPGA + 0x08 */
+ __raw_writew(((IRQPIN_EXTINT4 << IRQPOS_EXTINT4) |
+ (IRQPIN_EXTINT3 << IRQPOS_EXTINT3) |
+ (IRQPIN_EXTINT2 << IRQPOS_EXTINT2) |
+ (IRQPIN_EXTINT1 << IRQPOS_EXTINT1)), FPGA_INTSEL2);
+
+ /* FPGA + 0x0A */
+ __raw_writew((IRQPIN_PCCPW << IRQPOS_PCCPW), FPGA_INTSEL3);
+
+ plat_irq_setup_pins(IRQ_MODE_IRQ); /* install handlers for IRQ0-7 */
+
+ /* ICR1: detect low level(for 2ndcut) */
+ __raw_writel(0xAAAA0000, INTC_ICR1);
+
+ /*
+ * FPGA PCISEL register initialize
+ *
+ * CPU || SLOT1 | SLOT2 | S-ATA | USB
+ * -------------------------------------
+ * INTA || INTA | INTD | -- | INTB
+ * -------------------------------------
+ * INTB || INTB | INTA | -- | INTC
+ * -------------------------------------
+ * INTC || INTC | INTB | INTA | --
+ * -------------------------------------
+ * INTD || INTD | INTC | -- | INTA
+ * -------------------------------------
+ */
+ __raw_writew(0x0013, FPGA_PCI_INTSEL1);
+ __raw_writew(0xE402, FPGA_PCI_INTSEL2);
+}