mediatek: Move mtcmos code to a common directory

Move mtcmos code which can be reused into a common directory under
soc/mediatek.

BUG=b:80501386
BRANCH=none
TEST=Boots correctly on Elm

Change-Id: I92b138890424b4f4a68cdb00bf2326eef9cd87b7
Signed-off-by: Tristan Shieh <tristan.shieh@mediatek.com>
Reviewed-on: https://review.coreboot.org/27029
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 109 insertions, 0 deletions

diff --git a/src/soc/mediatek/common/include/soc/mtcmos.h b/src/soc/mediatek/common/include/soc/mtcmos.h
new file mode 100644
index 0000000000..e089fcc681
--- /dev/null
+++ b/src/soc/mediatek/common/include/soc/mtcmos.h
@@ -0,0 +1,22 @@
+/*
+ * 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_MTCMOS_H__
+#define __SOC_MEDIATEK_COMMON_MTCMOS_H__
+
+void mtcmos_audio_power_on(void);
+void mtcmos_display_power_on(void);
+
+#endif /* __SOC_MEDIATEK_COMMON_MTCMOS_H__ */
diff --git a/src/soc/mediatek/common/mtcmos.c b/src/soc/mediatek/common/mtcmos.c
new file mode 100644
index 0000000000..ef4299ffcb
--- /dev/null
+++ b/src/soc/mediatek/common/mtcmos.c
@@ -0,0 +1,87 @@
+/*
+ * 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.
+ */
+
+#include <stddef.h>
+
+#include <arch/io.h>
+#include <soc/mtcmos.h>
+#include <soc/spm.h>
+
+struct power_domain_data {
+	void *pwr_con;
+	u32 pwr_sta_mask;
+	u32 sram_pdn_mask;
+	u32 sram_ack_mask;
+};
+
+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 {
+	DISP_PWR_STA_MASK	= 0x1 << 3,
+	AUDIO_PWR_STA_MASK	= 0x1 << 24,
+};
+
+static void mtcmos_power_on(const struct power_domain_data *pd)
+{
+	write32(&mtk_spm->poweron_config_set,
+		(SPM_PROJECT_CODE << 16) | (1U << 0));
+
+	setbits_le32(pd->pwr_con, PWR_ON);
+	setbits_le32(pd->pwr_con, PWR_ON_2ND);
+
+	while (!(read32(&mtk_spm->pwr_status) & pd->pwr_sta_mask) ||
+	       !(read32(&mtk_spm->pwr_status_2nd) & pd->pwr_sta_mask))
+		continue;
+
+	clrbits_le32(pd->pwr_con, PWR_CLK_DIS);
+	clrbits_le32(pd->pwr_con, PWR_ISO);
+	setbits_le32(pd->pwr_con, PWR_RST_B);
+	clrbits_le32(pd->pwr_con, pd->sram_pdn_mask);
+
+	while (read32(pd->pwr_con) & pd->sram_ack_mask)
+		continue;
+}
+
+void mtcmos_display_power_on(void)
+{
+	static const struct power_domain_data disp = {
+		.pwr_con = &mtk_spm->dis_pwr_con,
+		.pwr_sta_mask = DISP_PWR_STA_MASK,
+		.sram_pdn_mask = DISP_SRAM_PDN_MASK,
+		.sram_ack_mask = DISP_SRAM_ACK_MASK,
+	};
+
+	mtcmos_power_on(&disp);
+}
+
+void mtcmos_audio_power_on(void)
+{
+	static const struct power_domain_data audio = {
+		.pwr_con = &mtk_spm->audio_pwr_con,
+		.pwr_sta_mask = AUDIO_PWR_STA_MASK,
+		.sram_pdn_mask = AUDIO_SRAM_PDN_MASK,
+		.sram_ack_mask = AUDIO_SRAM_ACK_MASK,
+	};
+
+	mtcmos_power_on(&audio);
+}