libpayload: Add Rock Chip drivers

Add support:
1)Support driver rktimer
2)Support driver rkserial

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

Original-Change-Id: I2cccedf3b62883dd372842a7972e93f2ebbfb282
Original-Signed-off-by: huang lin <hl@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/206184
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Tested-by: Julius Werner <jwerner@chromium.org>
Original-Commit-Queue: Julius Werner <jwerner@chromium.org>
(cherry picked from commit 387450d7c36b201bd177d46eb9f1d280fc043aab)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: Ia6b7a8ee2439a6f2bf7577df822d3f4f3a1e441c
Reviewed-on: http://review.coreboot.org/8127
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>

1 files changed, 46 insertions, 0 deletions

diff --git a/payloads/libpayload/drivers/timer/rktimer.c b/payloads/libpayload/drivers/timer/rktimer.c
new file mode 100644
index 0000000000..040ac32fa2
--- /dev/null
+++ b/payloads/libpayload/drivers/timer/rktimer.c
@@ -0,0 +1,46 @@
+
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Rockchip Electronics
+ *
+ * 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 <arch/io.h>
+#include <libpayload.h>
+#include <stdint.h>
+struct rk_timer {
+	u32 timer_load_count0;
+	u32 timer_load_count1;
+	u32 timer_curr_value0;
+	u32 timer_curr_value1;
+	u32 timer_ctrl_reg;
+	u32 timer_int_status;
+};
+
+uint64_t timer_hz(void)
+{
+	return 24000000;
+}
+
+uint64_t timer_raw_value(void)
+{
+	uint64_t upper;
+	uint64_t lower;
+	struct rk_timer *rk_timer;
+	rk_timer = (struct rk_timer *) CONFIG_LP_TIMER_RK_ADDRESS;
+	lower = (uint64_t) rk_timer->timer_curr_value0;
+	upper = (uint64_t) rk_timer->timer_curr_value1;
+	return (upper << 32) | lower;
+}