1 files changed, 141 insertions, 0 deletions
diff --git a/arch/sh/lib/time.c b/arch/sh/lib/time.c
new file mode 100644
index 00000000000..9a8f89aef60
--- /dev/null
+++ b/arch/sh/lib/time.c
@@ -0,0 +1,141 @@
+/*
+ * (C) Copyright 2009
+ * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * (C) Copyright 2007-2008
+ * Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ *
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <div64.h>
+#include <asm/processor.h>
+#include <asm/clk.h>
+#include <asm/io.h>
+
+#define TMU_MAX_COUNTER (~0UL)
+
+static ulong timer_freq;
+
+static inline unsigned long long tick_to_time(unsigned long long tick)
+{
+	tick *= CONFIG_SYS_HZ;
+	do_div(tick, timer_freq);
+
+	return tick;
+}
+
+static inline unsigned long long usec_to_tick(unsigned long long usec)
+{
+	usec *= timer_freq;
+	do_div(usec, 1000000);
+
+	return usec;
+}
+
+static void tmu_timer_start (unsigned int timer)
+{
+	if (timer > 2)
+		return;
+	writeb(readb(TSTR) | (1 << timer), TSTR);
+}
+
+static void tmu_timer_stop (unsigned int timer)
+{
+	if (timer > 2)
+		return;
+	writeb(readb(TSTR) & ~(1 << timer), TSTR);
+}
+
+int timer_init (void)
+{
+	/* Divide clock by CONFIG_SYS_TMU_CLK_DIV */
+	u16 bit = 0;
+
+	switch (CONFIG_SYS_TMU_CLK_DIV) {
+	case 1024:
+		bit = 4;
+		break;
+	case 256:
+		bit = 3;
+		break;
+	case 64:
+		bit = 2;
+		break;
+	case 16:
+		bit = 1;
+		break;
+	case 4:
+	default:
+		break;
+	}
+	writew(readw(TCR0) | bit, TCR0);
+
+	/* Calc clock rate */
+	timer_freq = get_tmu0_clk_rate() >> ((bit + 1) * 2);
+
+	tmu_timer_stop(0);
+	tmu_timer_start(0);
+
+	return 0;
+}
+
+unsigned long long get_ticks (void)
+{
+	return 0 - readl(TCNT0);
+}
+
+void __udelay (unsigned long usec)
+{
+	unsigned long long tmp;
+	ulong tmo;
+
+	tmo = usec_to_tick(usec);
+	tmp = get_ticks() + tmo;	/* get current timestamp */
+
+	while (get_ticks() < tmp)	/* loop till event */
+		 /*NOP*/;
+}
+
+unsigned long get_timer (unsigned long base)
+{
+	/* return msec */
+	return tick_to_time(get_ticks()) - base;
+}
+
+void set_timer (unsigned long t)
+{
+	writel((0 - t), TCNT0);
+}
+
+void reset_timer (void)
+{
+	tmu_timer_stop(0);
+	set_timer (0);
+	tmu_timer_start(0);
+}
+
+unsigned long get_tbclk (void)
+{
+	return timer_freq;
+}