patch-2.3.99-pre9 linux/include/asm-arm/arch-l7200/time.h

• Lines: 69
• Date: Mon May 15 12:00:33 2000
• Orig file: v2.3.99-pre8/linux/include/asm-arm/arch-l7200/time.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.99-pre8/linux/include/asm-arm/arch-l7200/time.h linux/include/asm-arm/arch-l7200/time.h
@@ -0,0 +1,68 @@
+/*
+ * linux/include/asm-arm/arch-l7200/time.h
+ *
+ * Copyright (C) 2000 Rob Scott (rscott@mtrob.fdns.net)
+ *                    Steve Hill (sjhill@cotw.com)
+ *
+ * Changelog:
+ *   01-02-2000	RS	Created l7200 version, derived from rpc code
+ *   05-03-2000	SJH	Complete rewrite
+ */
+#ifndef _ASM_ARCH_TIME_H
+#define _ASM_ARCH_TIME_H
+
+#include <asm/arch/irqs.h>
+
+/*
+ * RTC base register address
+ */
+#define RTC_BASE	(IO_BASE_2 + 0x2000)
+
+/*
+ * RTC registers
+ */
+#define RTC_RTCDR	(*(volatile unsigned char *) (RTC_BASE + 0x000))
+#define RTC_RTCMR	(*(volatile unsigned char *) (RTC_BASE + 0x004))
+#define RTC_RTCS	(*(volatile unsigned char *) (RTC_BASE + 0x008))
+#define RTC_RTCC	(*(volatile unsigned char *) (RTC_BASE + 0x008))
+#define RTC_RTCDV	(*(volatile unsigned char *) (RTC_BASE + 0x00c))
+#define RTC_RTCCR	(*(volatile unsigned char *) (RTC_BASE + 0x010))
+
+/*
+ * RTCCR register values
+ */
+#define RTC_RATE_32	0x00      /* 32 Hz tick */
+#define RTC_RATE_64	0x10      /* 64 Hz tick */
+#define RTC_RATE_128	0x20      /* 128 Hz tick */
+#define RTC_RATE_256	0x30      /* 256 Hz tick */
+#define RTC_EN_ALARM	0x01      /* Enable alarm */
+#define RTC_EN_TIC	0x04      /* Enable counter */
+#define RTC_EN_STWDOG	0x08      /* Enable watchdog */
+
+/*
+ * Handler for timer interrupt
+ */
+static void timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	do_timer(regs);
+	do_profile(regs);
+	RTC_RTCC = 0;				/* Clear interrupt */
+}
+
+/*
+ * Set up timer interrupt, and return the current time in seconds.
+ */
+extern __inline__ void setup_timer(void)
+{
+	xtime.tv_sec = RTC_RTCDR;
+
+	RTC_RTCC = 0;				/* Clear interrupt */
+
+	timer_irq.handler = timer_interrupt;
+
+	setup_arm_irq(IRQ_RTC_TICK, &timer_irq);
+
+	RTC_RTCCR = RTC_RATE_128 | RTC_EN_TIC;	/* Set rate and enable timer */
+}
+
+#endif