libpayload: mvmap2315: Introduce timer driver

Testing: booted successfully.

Change-Id: I4a50c9fb7aec929ea29a3cf2eec3e424e3629c92
Signed-off-by: Hakim Giydan <hgiydan@marvell.com>
Reviewed-on: https://review.coreboot.org/16692
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

payloads/libpayload/drivers/Makefile.inc

@@ -57,6 +57,7 @@ libc-$(CONFIG_LP_TIMER_BG4CD) += timer/bg4cd.c
 libc-$(CONFIG_LP_TIMER_IMG_PISTACHIO) += timer/img_pistachio.c
 libc-$(CONFIG_LP_TIMER_CYGNUS) += timer/cygnus.c
 libc-$(CONFIG_LP_TIMER_ARMADA38X) += timer/armada38x.c
+libc-$(CONFIG_LP_TIMER_MVMAP2315) += timer/mvmap2315.c
 
 # Video console drivers
 libc-$(CONFIG_LP_VIDEO_CONSOLE) += video/video.c

payloads/libpayload/drivers/timer/Kconfig

@@ -61,6 +61,9 @@ config TIMER_IMG_PISTACHIO
 config TIMER_MTK
 	bool "Timer for MediaTek MT8173"
 
+config TIMER_MVMAP2315
+	bool "Timer for Marvell MVMAP2315"
+
 endchoice
 
 config TIMER_MCT_HZ
@@ -108,6 +111,16 @@ config ARMADA38X_TIMER_REG
         default 0xF1020314
         depends on TIMER_ARMADA38X
 
+config MVMAP2315_TIMER_FREQ
+	int "Hardware timer frequency"
+	depends on TIMER_MVMAP2315
+	default 1000000
+
+config MVMAP2315_TIMER_REG
+	hex "Timer register address"
+	depends on TIMER_MVMAP2315
+	default 0xE1020004
+
 config IPROC_PERIPH_GLB_TIM_REG_BASE
 	hex "Cygnus timer base address"
 	depends on TIMER_CYGNUS

payloads/libpayload/drivers/timer/mvmap2315.c

@@ -0,0 +1,44 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Marvell Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <assert.h>
+#include <libpayload.h>
+
+static u32 *reg = (void *)CONFIG_LP_MVMAP2315_TIMER_REG;
+
+uint64_t timer_hz(void)
+{
+	return CONFIG_LP_MVMAP2315_TIMER_FREQ;
+}
+
+uint64_t timer_raw_value(void)
+{
+	/* invert count to change from down to up count */
+	return ~readl(reg);
+}