1 files changed, 63 insertions, 0 deletions
diff --git a/src/soc/marvell/mvmap2315/timer.c b/src/soc/marvell/mvmap2315/timer.c
new file mode 100644
index 0000000000..7922e05a79
--- /dev/null
+++ b/src/soc/marvell/mvmap2315/timer.c
@@ -0,0 +1,63 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Marvell, Inc.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <arch/io.h>
+#include <delay.h>
+#include <soc/timer.h>
+#include <timer.h>
+
+void init_timer(void)
+{
+	/* disable timer */
+	clrbits_le32(&mvmap2315_timer0->t1cr, MVMAP2315_TIMER_T1CR_TE);
+
+	/* set to free-running mode (loads max value at timer expiration) */
+	clrbits_le32(&mvmap2315_timer0->t1cr, MVMAP2315_TIMER_T1CR_TM);
+
+	/* mask interrupt (not currently used) */
+	setbits_le32(&mvmap2315_timer0->t1cr, MVMAP2315_TIMER_T1CR_TIM);
+
+	/* disable PWM output */
+	clrbits_le32(&mvmap2315_timer0->t1cr, MVMAP2315_TIMER_T1CR_TPWM);
+
+	/* perform dummy read to clear all active interrupts */
+	read32(&mvmap2315_timer0->t1eoi);
+
+	/* must provide an initial load count even in free-running mode */
+	write32(&mvmap2315_timer0->t1lc, 0xFFFFFFFF);
+
+	/* enable timer */
+	setbits_le32(&mvmap2315_timer0->t1cr, MVMAP2315_TIMER_T1CR_TE);
+
+	/* busy wait until timer count is non-zero */
+	while (!read32(&mvmap2315_timer0->t1cv))
+		;
+}
+
+static u32 timer_raw_value(void)
+{
+	/* invert count to change from down to up count */
+	return ~read32(&mvmap2315_timer0->t1cv);
+}
+
+void timer_monotonic_get(struct mono_time *mt)
+{
+	mt->microseconds = (long)(timer_raw_value() /
+				  MVMAP2315_CLOCKS_PER_USEC);
+}