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-rw-r--r--arch/arm/mach-epxa10db/time.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/arm/mach-epxa10db/time.c b/arch/arm/mach-epxa10db/time.c
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index 000000000000..1b991f3cc3c6
--- /dev/null
+++ b/arch/arm/mach-epxa10db/time.c
@@ -0,0 +1,78 @@
+/*
+ * linux/arch/arm/mach-epxa10db/time.c
+ *
+ * Copyright (C) 2000 Deep Blue Solutions
+ * Copyright (C) 2001 Altera Corporation
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+
+#include <asm/hardware.h>
+#include <asm/system.h>
+#include <asm/leds.h>
+
+#include <asm/mach/time.h>
+
+#define TIMER00_TYPE (volatile unsigned int*)
+#include <asm/arch/timer00.h>
+
+static int epxa10db_set_rtc(void)
+{
+ return 1;
+}
+
+static int epxa10db_rtc_init(void)
+{
+ set_rtc = epxa10db_set_rtc;
+
+ return 0;
+}
+
+__initcall(epxa10db_rtc_init);
+
+
+/*
+ * IRQ handler for the timer
+ */
+static irqreturn_t
+epxa10db_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ write_seqlock(&xtime_lock);
+
+ // ...clear the interrupt
+ *TIMER0_CR(IO_ADDRESS(EXC_TIMER00_BASE))|=TIMER0_CR_CI_MSK;
+
+ timer_tick(regs);
+ write_sequnlock(&xtime_lock);
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction epxa10db_timer_irq = {
+ .name = "Excalibur Timer Tick",
+ .flags = SA_INTERRUPT,
+ .handler = epxa10db_timer_interrupt
+};
+
+/*
+ * Set up timer interrupt, and return the current time in seconds.
+ */
+static void __init epxa10db_timer_init(void)
+{
+ /* Start the timer */
+ *TIMER0_LIMIT(IO_ADDRESS(EXC_TIMER00_BASE))=(unsigned int)(EXC_AHB2_CLK_FREQUENCY/200);
+ *TIMER0_PRESCALE(IO_ADDRESS(EXC_TIMER00_BASE))=1;
+ *TIMER0_CR(IO_ADDRESS(EXC_TIMER00_BASE))=TIMER0_CR_IE_MSK | TIMER0_CR_S_MSK;
+
+ setup_irq(IRQ_TIMER0, &epxa10db_timer_irq);
+}
+
+struct sys_timer epxa10db_timer = {
+ .init = epxa10db_timer_init,
+};