patch-2.4.9 linux/arch/arm/mach-anakin/irq.c

• Lines: 85
• Date: Sun Aug 12 11:13:59 2001
• Orig file: v2.4.8/linux/arch/arm/mach-anakin/irq.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.8/linux/arch/arm/mach-anakin/irq.c linux/arch/arm/mach-anakin/irq.c
@@ -0,0 +1,84 @@
+/*
+ *  linux/arch/arm/mach-anakin/irq.c
+ *
+ *  Copyright (C) 2001 Aleph One Ltd. for Acunia N.V.
+ *
+ * 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.
+ *
+ *  Changelog:
+ *   10-Apr-2001 TTC	Created
+ */
+
+#include <linux/ptrace.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+
+extern unsigned int anakin_irq_mask, anakin_active_irqs;
+extern void do_IRQ(int, struct pt_regs *);
+
+static void
+anakin_mask_irq(unsigned int irq)
+{
+	anakin_irq_mask &= ~(1 << irq);
+}
+
+static void
+anakin_unmask_irq(unsigned int irq)
+{
+	anakin_irq_mask |= (1 << irq);
+}
+
+/*
+ * This is a faked interrupt to deal with parallel interrupt requests
+ * on the Anakin.  Make sure that its interrupt number is not in any
+ * way conflicting with the hardware interrupt numbers!  Check
+ * IRQ_ANAKIN in linux/include/asm-arm/arch-anakin/irqs.h.
+ */
+static void
+anakin_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	for (irq = 0; irq < NR_IRQS; irq++)
+		if (anakin_active_irqs & (1 << irq))
+			do_IRQ(irq, regs);
+}
+
+static struct irqaction anakin_irq = {
+	name:		"Anakin IRQ",
+	handler:	anakin_interrupt,
+	flags:		SA_INTERRUPT
+};
+ 
+void __init
+irq_init_irq(void)
+{
+	unsigned int irq;
+
+	for (irq = 0; irq < NR_IRQS; irq++) {
+		switch (irq) {
+		case IRQ_UART0:
+		case IRQ_UART1:
+		case IRQ_UART2:
+		case IRQ_TICK:
+		case IRQ_CODEC:
+		case IRQ_UART4:
+		case IRQ_TOUCHSCREEN:
+		case IRQ_UART3:
+		case IRQ_FIFO:
+		case IRQ_CAN:
+		case IRQ_COMPACTFLASH:
+		case IRQ_BOSH:
+		case IRQ_ANAKIN:
+			irq_desc[irq].valid = 1;
+			irq_desc[irq].mask_ack = anakin_mask_irq;
+			irq_desc[irq].mask = anakin_mask_irq;
+			irq_desc[irq].unmask = anakin_unmask_irq;
+		}
+	}
+	setup_arm_irq(IRQ_ANAKIN, &anakin_irq);
+}