mediatek: Move uart, timer and cbmem code to a common directory.

This patch moves uart, timer and cbmem code which can be reused into a
common directory under soc/mediatek.

BUG=b:80501386
BRANCH=none
TEST=the refactored code works fine on the new platform (with the rest
     of the patches applied) and Elm platform

Change-Id: I5210149b324947ee90f1a481b42f0e2e1f7cfc25
Signed-off-by: Tristan Shieh <tristan.shieh@mediatek.com>
Reviewed-on: https://review.coreboot.org/26658
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>

1 files changed, 50 insertions, 0 deletions

diff --git a/src/soc/mediatek/common/include/soc/timer.h b/src/soc/mediatek/common/include/soc/timer.h
new file mode 100644
index 0000000000..babcbba561
--- /dev/null
+++ b/src/soc/mediatek/common/include/soc/timer.h
@@ -0,0 +1,50 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 MediaTek 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.
+ */
+
+#ifndef SOC_MEDIATEK_COMMON_TIMER_H
+#define SOC_MEDIATEK_COMMON_TIMER_H
+
+#include <soc/addressmap.h>
+#include <types.h>
+
+#define GPT4_MHZ	13
+
+struct mtk_gpt_regs {
+	u32 reserved[16];
+	u32 gpt4_con;
+	u32 gpt4_clk;
+	u32 gpt4_cnt;
+};
+
+check_member(mtk_gpt_regs, gpt4_con, 0x0040);
+check_member(mtk_gpt_regs, gpt4_clk, 0x0044);
+check_member(mtk_gpt_regs, gpt4_cnt, 0x0048);
+
+enum {
+	GPT_CON_EN        = 0x01,
+	GPT_CON_CLR       = 0x02,
+	GPT_MODE_FREERUN  = 0x30,
+	GPT_SYS_CLK       = 0x00,
+	GPT_CLK_DIV1      = 0x00,
+};
+
+/*
+ * This is defined as weak no-ops that can be overridden by legacy SOCs. Some
+ * legacy SOCs need specific settings before init timer. And we expect future
+ * SOCs will not need it.
+ */
+void timer_prepare(void);
+
+#endif