rockchip: rk3399: add sdram driver

Add the sdram driver for rk3399. With this patch we can boot
into depthcharge.

This patch also include a config file for lpddr3-hynix-4GB
that generated bases on its datasheet.

Please refer to TRM V0.3 Part1 Chapter 9 for DMC.

BRANCH=none
BUG=chrome-os-partner:51537
TEST=boot to depthcharge on kevin

Change-Id: I2afcaa3b68dbad77a5fe677b835289b675ed2bef
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 5d777e29942057fb7237eefa34051d1f54b19405
Original-Change-Id: Ifa1fe98a7058869518757d50678a64620610d91d
Original-Signed-off-by: Lin Huang <hl@rock-chips.com>
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/332562
Reviewed-on: https://review.coreboot.org/14716
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/src/mainboard/google/gru/sdram_configs.c b/src/mainboard/google/gru/sdram_configs.c
new file mode 100644
index 000000000000..787b36fa2da7
--- /dev/null
+++ b/src/mainboard/google/gru/sdram_configs.c
@@ -0,0 +1,36 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google 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 <arch/io.h>
+#include <boardid.h>
+#include <console/console.h>
+#include <gpio.h>
+#include <soc/sdram.h>
+#include <string.h>
+#include <types.h>
+
+static struct rk3399_sdram_params sdram_configs[] = {
+#include "sdram_inf/sdram-lpddr3-hynix-4GB.inc"
+};
+
+const struct rk3399_sdram_params *get_sdram_config()
+{
+	u32 ramcode = ram_code();
+
+	if (ramcode >= ARRAY_SIZE(sdram_configs)
+			|| sdram_configs[ramcode].dramtype == UNUSED)
+		die("Invalid RAMCODE.");
+	return &sdram_configs[ramcode];
+}