coreboot: rk3288: Add a stub implementation of the rk3288 SOC

Most things still needs to be filled in, but this will allow us to build boards which use this SOC.

BUG=chrome-os-partner:29778
TEST=emerge-veyron coreboot

Original-Change-Id: If643d620c5fb8951faaf1ccde400a8e9ed7db3bc
Original-Signed-off-by: jinkun.hong <jinkun.hong@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/205069
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Original-Commit-Queue: David Hendricks <dhendrix@chromium.org>
Original-Tested-by: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit 2f72473a8c2b3fe21d77b351338e6209035878fb)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I53fd0ced42f6ef191d7bf80d8b823bb880344239
Reviewed-on: http://review.coreboot.org/8653
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 58 insertions, 0 deletions

diff --git a/src/soc/rockchip/rk3288/timer.c b/src/soc/rockchip/rk3288/timer.c
new file mode 100644
index 0000000000..3a2c34d341
--- /dev/null
+++ b/src/soc/rockchip/rk3288/timer.c
@@ -0,0 +1,58 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Rockchip 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.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <console/console.h>
+#include <timer.h>
+#include <delay.h>
+#include <arch/io.h>
+#include "timer.h"
+
+void init_timer(void)
+{
+}
+
+void rk3288_init_timer(void)
+{
+	write32(TIMER_LOAD_VAL, &timer7_ptr->timer_load_count0);
+	write32(TIMER_LOAD_VAL, &timer7_ptr->timer_load_count1);
+	write32(1, &timer7_ptr->timer_ctrl_reg);
+}
+
+/* delay x useconds */
+void udelay(unsigned usec)
+{
+	struct mono_time current, end;
+
+	timer_monotonic_get(&current);
+	end = current;
+	mono_time_add_usecs(&end, usec);
+
+	if (mono_time_after(&current, &end)) {
+		printk(BIOS_EMERG, "udelay: 0x%08x is impossibly large\n",
+				usec);
+		/* There's not much we can do if usec is too big. Use a long,
+		 * paranoid delay value and hope for the best... */
+		end = current;
+		mono_time_add_usecs(&end, USECS_PER_SEC);
+	}
+
+	while (mono_time_before(&current, &end))
+		timer_monotonic_get(&current);
+}
+