mediatek/mt8173: Add mtcmos power-on control for audio and display

BRANCH=none
BUG=none
TEST=none

Change-Id: Ic046c66c8e314bd61f96c2edbc5d832260590afe
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 84de3a6f1a726938e2318814d6faaf6a7dd29ac0
Original-Change-Id: If29f28a092617532dd73e71e0dbe24fd930c3bf8
Original-Signed-off-by: CC Ma <cc.ma@mediatek.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/292677
Original-Commit-Ready: Yidi Lin <yidi.lin@mediatek.com>
Original-Tested-by: Yidi Lin <yidi.lin@mediatek.com>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/12617
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
diff --git a/src/soc/mediatek/mt8173/include/soc/mtcmos.h b/src/soc/mediatek/mt8173/include/soc/mtcmos.h
new file mode 100644
index 0000000..a2b4f65
--- /dev/null
+++ b/src/soc/mediatek/mt8173/include/soc/mtcmos.h
@@ -0,0 +1,21 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 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_MT8173_MTCMOS_H__
+#define __SOC_MEDIATEK_MT8173_MTCMOS_H__
+
+void mtcmos_audio_power_on(void);
+void mtcmos_display_power_on(void);
+#endif /* __SOC_MEDIATEK_MT8173_MTCMOS_H__ */
diff --git a/src/soc/mediatek/mt8173/mtcmos.c b/src/soc/mediatek/mt8173/mtcmos.c
new file mode 100644
index 0000000..b9b8ceb
--- /dev/null
+++ b/src/soc/mediatek/mt8173/mtcmos.c
@@ -0,0 +1,72 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 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.
+ */
+
+#include <arch/io.h>
+#include <soc/mtcmos.h>
+#include <soc/spm.h>
+
+enum {
+	SRAM_ISOINT_B	= 1U << 6,
+	SRAM_CKISO	= 1U << 5,
+	PWR_CLK_DIS	= 1U << 4,
+	PWR_ON_2ND	= 1U << 3,
+	PWR_ON		= 1U << 2,
+	PWR_ISO		= 1U << 1,
+	PWR_RST_B	= 1U << 0
+};
+
+enum {
+	SRAM_PDN           = 0xf << 8,
+	DIS_SRAM_ACK       = 0x1 << 12,
+	AUD_SRAM_ACK       = 0xf << 12,
+};
+
+enum {
+	DIS_PWR_STA_MASK   = 0x1 << 3,
+	AUD_PWR_STA_MASK   = 0x1 << 24,
+};
+
+static void mtcmos_power_on(u32 *pwr_con, u32 pwr_sta_mask)
+{
+	write32(&mt8173_spm->poweron_config_set,
+		(SPM_PROJECT_CODE << 16) | (1U << 0));
+
+	setbits_le32(pwr_con, PWR_ON);
+	setbits_le32(pwr_con, PWR_ON_2ND);
+
+	while (!(read32(&mt8173_spm->pwr_status) & pwr_sta_mask) ||
+	       !(read32(&mt8173_spm->pwr_status_2nd) & pwr_sta_mask))
+		continue;
+
+	clrbits_le32(pwr_con, PWR_CLK_DIS);
+	clrbits_le32(pwr_con, PWR_ISO);
+	setbits_le32(pwr_con, PWR_RST_B);
+	clrbits_le32(pwr_con, SRAM_PDN);
+}
+
+void mtcmos_audio_power_on(void)
+{
+	mtcmos_power_on(&mt8173_spm->audio_pwr_con, AUD_PWR_STA_MASK);
+	while (read32(&mt8173_spm->audio_pwr_con) & AUD_SRAM_ACK)
+		continue;
+}
+
+void mtcmos_display_power_on(void)
+{
+	mtcmos_power_on(&mt8173_spm->dis_pwr_con, DIS_PWR_STA_MASK);
+	while (read32(&mt8173_spm->dis_pwr_con) & DIS_SRAM_ACK)
+		continue;
+}
+