ARM: 5645/1: bcmring: add bcmring irq.c
init irq and handler
add irq controller register file and header files
Signed-off-by: Leo Chen <leochen@broadcom.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-bcmring/irq.c b/arch/arm/mach-bcmring/irq.c
new file mode 100644
index 0000000..dc1c493
--- /dev/null
+++ b/arch/arm/mach-bcmring/irq.c
@@ -0,0 +1,127 @@
+/*
+ *
+ * Copyright (C) 1999 ARM Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/init.h>
+#include <linux/stddef.h>
+#include <linux/list.h>
+#include <linux/timer.h>
+#include <linux/version.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <asm/irq.h>
+
+#include <asm/mach/irq.h>
+#include <mach/csp/intcHw_reg.h>
+#include <mach/csp/mm_io.h>
+
+static void bcmring_mask_irq0(unsigned int irq)
+{
+ writel(1 << (irq - IRQ_INTC0_START),
+ MM_IO_BASE_INTC0 + INTCHW_INTENCLEAR);
+}
+
+static void bcmring_unmask_irq0(unsigned int irq)
+{
+ writel(1 << (irq - IRQ_INTC0_START),
+ MM_IO_BASE_INTC0 + INTCHW_INTENABLE);
+}
+
+static void bcmring_mask_irq1(unsigned int irq)
+{
+ writel(1 << (irq - IRQ_INTC1_START),
+ MM_IO_BASE_INTC1 + INTCHW_INTENCLEAR);
+}
+
+static void bcmring_unmask_irq1(unsigned int irq)
+{
+ writel(1 << (irq - IRQ_INTC1_START),
+ MM_IO_BASE_INTC1 + INTCHW_INTENABLE);
+}
+
+static void bcmring_mask_irq2(unsigned int irq)
+{
+ writel(1 << (irq - IRQ_SINTC_START),
+ MM_IO_BASE_SINTC + INTCHW_INTENCLEAR);
+}
+
+static void bcmring_unmask_irq2(unsigned int irq)
+{
+ writel(1 << (irq - IRQ_SINTC_START),
+ MM_IO_BASE_SINTC + INTCHW_INTENABLE);
+}
+
+static struct irq_chip bcmring_irq0_chip = {
+ .typename = "ARM-INTC0",
+ .ack = bcmring_mask_irq0,
+ .mask = bcmring_mask_irq0, /* mask a specific interrupt, blocking its delivery. */
+ .unmask = bcmring_unmask_irq0, /* unmaks an interrupt */
+};
+
+static struct irq_chip bcmring_irq1_chip = {
+ .typename = "ARM-INTC1",
+ .ack = bcmring_mask_irq1,
+ .mask = bcmring_mask_irq1,
+ .unmask = bcmring_unmask_irq1,
+};
+
+static struct irq_chip bcmring_irq2_chip = {
+ .typename = "ARM-SINTC",
+ .ack = bcmring_mask_irq2,
+ .mask = bcmring_mask_irq2,
+ .unmask = bcmring_unmask_irq2,
+};
+
+static void vic_init(void __iomem *base, struct irq_chip *chip,
+ unsigned int irq_start, unsigned int vic_sources)
+{
+ unsigned int i;
+ for (i = 0; i < 32; i++) {
+ unsigned int irq = irq_start + i;
+ set_irq_chip(irq, chip);
+ set_irq_chip_data(irq, base);
+
+ if (vic_sources & (1 << i)) {
+ set_irq_handler(irq, handle_level_irq);
+ set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+ }
+ }
+ writel(0, base + INTCHW_INTSELECT);
+ writel(0, base + INTCHW_INTENABLE);
+ writel(~0, base + INTCHW_INTENCLEAR);
+ writel(0, base + INTCHW_IRQSTATUS);
+ writel(~0, base + INTCHW_SOFTINTCLEAR);
+}
+
+void __init bcmring_init_irq(void)
+{
+ vic_init((void __iomem *)MM_IO_BASE_INTC0, &bcmring_irq0_chip,
+ IRQ_INTC0_START, IRQ_INTC0_VALID_MASK);
+ vic_init((void __iomem *)MM_IO_BASE_INTC1, &bcmring_irq1_chip,
+ IRQ_INTC1_START, IRQ_INTC1_VALID_MASK);
+ vic_init((void __iomem *)MM_IO_BASE_SINTC, &bcmring_irq2_chip,
+ IRQ_SINTC_START, IRQ_SINTC_VALID_MASK);
+
+ /* special cases */
+ if (INTCHW_INTC1_GPIO0 & IRQ_INTC1_VALID_MASK) {
+ set_irq_handler(IRQ_GPIO0, handle_simple_irq);
+ }
+ if (INTCHW_INTC1_GPIO1 & IRQ_INTC1_VALID_MASK) {
+ set_irq_handler(IRQ_GPIO1, handle_simple_irq);
+ }
+}