aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-lh7a40x/irq-kev7a400.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-lh7a40x/irq-kev7a400.c')
-rw-r--r--arch/arm/mach-lh7a40x/irq-kev7a400.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/arch/arm/mach-lh7a40x/irq-kev7a400.c b/arch/arm/mach-lh7a40x/irq-kev7a400.c
new file mode 100644
index 000000000000..691bb09232a5
--- /dev/null
+++ b/arch/arm/mach-lh7a40x/irq-kev7a400.c
@@ -0,0 +1,92 @@
+/* arch/arm/mach-lh7a40x/irq-kev7a400.c
+ *
+ * Copyright (C) 2004 Coastal Environmental Systems
+ *
+ * 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/interrupt.h>
+#include <linux/init.h>
+
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/hardware.h>
+#include <asm/mach/irqs.h>
+
+
+ /* KEV7a400 CPLD IRQ handling */
+
+static u16 CPLD_IRQ_mask; /* Mask for CPLD IRQs, 1 == unmasked */
+
+static void
+lh7a400_ack_cpld_irq (u32 irq)
+{
+ CPLD_CL_INT = 1 << (irq - IRQ_KEV7A400_CPLD);
+}
+
+static void
+lh7a400_mask_cpld_irq (u32 irq)
+{
+ CPLD_IRQ_mask &= ~(1 << (irq - IRQ_KEV7A400_CPLD));
+ CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
+}
+
+static void
+lh7a400_unmask_cpld_irq (u32 irq)
+{
+ CPLD_IRQ_mask |= 1 << (irq - IRQ_KEV7A400_CPLD);
+ CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask;
+}
+
+static struct
+irqchip lh7a400_cpld_chip = {
+ .ack = lh7a400_ack_cpld_irq,
+ .mask = lh7a400_mask_cpld_irq,
+ .unmask = lh7a400_unmask_cpld_irq,
+};
+
+static void
+lh7a400_cpld_handler (unsigned int irq, struct irqdesc *desc,
+ struct pt_regs *regs)
+{
+ u32 mask = CPLD_LATCHED_INTS;
+ irq = IRQ_KEV_7A400_CPLD;
+ for (; mask; mask >>= 1, ++irq) {
+ if (mask & 1)
+ desc[irq].handle (irq, desc, regs);
+ }
+}
+
+ /* IRQ initialization */
+
+void __init
+lh7a400_init_board_irq (void)
+{
+ int irq;
+
+ for (irq = IRQ_KEV7A400_CPLD;
+ irq < IRQ_KEV7A400_CPLD + NR_IRQ_KEV7A400_CPLD; ++irq) {
+ set_irq_chip (irq, &lh7a400_cpld_chip);
+ set_irq_handler (irq, do_edge_IRQ);
+ set_irq_flags (irq, IRQF_VALID);
+ }
+ set_irq_chained_handler (IRQ_CPLD, kev7a400_cpld_handler);
+
+ /* Clear all CPLD interrupts */
+ CPLD_CL_INT = 0xff; /* CPLD_INTR_MMC_CD | CPLD_INTR_ETH_INT; */
+
+ /* *** FIXME CF enabled in ide-probe.c */
+
+ GPIO_GPIOINTEN = 0; /* Disable all GPIO interrupts */
+ barrier();
+ GPIO_INTTYPE1
+ = (GPIO_INTR_PCC1_CD | GPIO_INTR_PCC1_CD); /* Edge trig. */
+ GPIO_INTTYPE2 = 0; /* Falling edge & low-level */
+ GPIO_GPIOFEOI = 0xff; /* Clear all GPIO interrupts */
+ GPIO_GPIOINTEN = 0xff; /* Enable all GPIO interrupts */
+
+ init_FIQ();
+}