summaryrefslogtreecommitdiffstats
path: root/arch/m68k/platform/coldfire/intc-525x.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/m68k/platform/coldfire/intc-525x.c')
-rw-r--r--arch/m68k/platform/coldfire/intc-525x.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/arch/m68k/platform/coldfire/intc-525x.c b/arch/m68k/platform/coldfire/intc-525x.c
new file mode 100644
index 0000000..b23204d
--- /dev/null
+++ b/arch/m68k/platform/coldfire/intc-525x.c
@@ -0,0 +1,91 @@
+/*
+ * intc2.c -- support for the 2nd INTC controller of the 525x
+ *
+ * (C) Copyright 2012, Steven King <sfking@fdwdc.com>
+ * (C) Copyright 2009, Greg Ungerer <gerg@snapgear.com>
+ *
+ * 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/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+
+static void intc2_irq_gpio_mask(struct irq_data *d)
+{
+ u32 imr = readl(MCFSIM2_GPIOINTENABLE);
+ u32 type = irqd_get_trigger_type(d);
+ int irq = d->irq - MCF_IRQ_GPIO0;
+
+ if (type & IRQ_TYPE_EDGE_RISING)
+ imr &= ~(0x001 << irq);
+ if (type & IRQ_TYPE_EDGE_FALLING)
+ imr &= ~(0x100 << irq);
+ writel(imr, MCFSIM2_GPIOINTENABLE);
+}
+
+static void intc2_irq_gpio_unmask(struct irq_data *d)
+{
+ u32 imr = readl(MCFSIM2_GPIOINTENABLE);
+ u32 type = irqd_get_trigger_type(d);
+ int irq = d->irq - MCF_IRQ_GPIO0;
+
+ if (type & IRQ_TYPE_EDGE_RISING)
+ imr |= (0x001 << irq);
+ if (type & IRQ_TYPE_EDGE_FALLING)
+ imr |= (0x100 << irq);
+ writel(imr, MCFSIM2_GPIOINTENABLE);
+}
+
+static void intc2_irq_gpio_ack(struct irq_data *d)
+{
+ u32 imr = 0;
+ u32 type = irqd_get_trigger_type(d);
+ int irq = d->irq - MCF_IRQ_GPIO0;
+
+ if (type & IRQ_TYPE_EDGE_RISING)
+ imr |= (0x001 << irq);
+ if (type & IRQ_TYPE_EDGE_FALLING)
+ imr |= (0x100 << irq);
+ writel(imr, MCFSIM2_GPIOINTCLEAR);
+}
+
+static int intc2_irq_gpio_set_type(struct irq_data *d, unsigned int f)
+{
+ if (f & ~IRQ_TYPE_EDGE_BOTH)
+ return -EINVAL;
+ return 0;
+}
+
+static struct irq_chip intc2_irq_gpio_chip = {
+ .name = "CF-INTC2",
+ .irq_mask = intc2_irq_gpio_mask,
+ .irq_unmask = intc2_irq_gpio_unmask,
+ .irq_ack = intc2_irq_gpio_ack,
+ .irq_set_type = intc2_irq_gpio_set_type,
+};
+
+static int __init mcf_intc2_init(void)
+{
+ int irq;
+
+ /* set the interrupt base for the second interrupt controller */
+ writel(MCFINTC2_VECBASE, MCFINTC2_INTBASE);
+
+ /* GPIO interrupt sources */
+ for (irq = MCF_IRQ_GPIO0; (irq <= MCF_IRQ_GPIO6); irq++) {
+ irq_set_chip(irq, &intc2_irq_gpio_chip);
+ irq_set_handler(irq, handle_edge_irq);
+ }
+
+ return 0;
+}
+
+arch_initcall(mcf_intc2_init);