mediatek/mt8173: Add a stub implementation of the MT8173 SoC

BUG=chrome-os-partner:36682
TEST=emerge-oak coreboot
BRANCH=none

Change-Id: I748752d5abca813a0469d3a76e4d40fcbeb9b959
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: ece2f412d94f071a6f5f1dbed4dfaea504da9e1a
Original-Change-Id: I1dd5567a10d20840313703cfcd328bec591b4941
Original-Signed-off-by: Yidi Lin <yidi.lin@mediatek.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/292558
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/12587
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

15 files changed, 1094 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8173/Kconfig b/src/soc/mediatek/mt8173/Kconfig
new file mode 100644
index 0000000000..0f0b1347a8
--- /dev/null
+++ b/src/soc/mediatek/mt8173/Kconfig
@@ -0,0 +1,49 @@
+config SOC_MEDIATEK_MT8173
+	bool
+	default n
+	select ARM64_A53_ERRATUM_843419
+	select ARCH_BOOTBLOCK_ARMV8_64
+	select ARCH_RAMSTAGE_ARMV8_64
+	select ARCH_ROMSTAGE_ARMV8_64
+	select ARCH_VERSTAGE_ARMV8_64
+	select BOOTBLOCK_CONSOLE
+	select HAVE_UART_SPECIAL
+	select SPI_ATOMIC_SEQUENCING
+	select HAVE_MONOTONIC_TIMER
+	select GENERIC_UDELAY
+	select HAS_PRECBMEM_TIMESTAMP_REGION
+
+if SOC_MEDIATEK_MT8173
+
+config DEBUG_SOC_DRIVER
+	bool "The top level switch for soc driver debug message"
+	default n
+	select DEBUG_DRAM
+	select DEBUG_I2C
+	select DEBUG_PMIC
+	select DEBUG_PMIC_WRAP
+
+config DEBUG_DRAM
+	bool "Output verbose DRAM related debug message"
+	default n
+	help
+	  This option enables additional DRAM related debug messages.
+
+config DEBUG_I2C
+	bool "Output verbose I2C related debug message"
+	default n
+	help
+	  This option enables I2C related debug message.
+
+config DEBUG_PMIC
+	bool "Output verbose PMIC related debug message"
+	default n
+	help
+	  This option enables PMIC related debug message.
+
+config DEBUG_PMIC_WRAP
+	bool "Output verbose PMIC WRAP related debug message"
+	default n
+	help
+	  This option enables PMIC WRAP related debug message.
+endif
diff --git a/src/soc/mediatek/mt8173/Makefile.inc b/src/soc/mediatek/mt8173/Makefile.inc
new file mode 100644
index 0000000000..74a7618c32
--- /dev/null
+++ b/src/soc/mediatek/mt8173/Makefile.inc
@@ -0,0 +1,50 @@
+##
+## 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.
+##
+## 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
+##
+
+ifeq ($(CONFIG_SOC_MEDIATEK_MT8173),y)
+
+bootblock-y += bootblock.c
+bootblock-y += cbfs.c
+bootblock-y += timer.c
+
+ifeq ($(CONFIG_BOOTBLOCK_CONSOLE),y)
+bootblock-$(CONFIG_DRIVERS_UART) += uart.c
+endif
+
+################################################################################
+
+romstage-y += cbfs.c
+romstage-y += timer.c
+
+romstage-$(CONFIG_DRIVERS_UART) += uart.c
+romstage-y += cbmem.c
+
+################################################################################
+
+ramstage-y += cbmem.c
+ramstage-y += cbfs.c
+ramstage-y += soc.c
+ramstage-y += timer.c
+ramstage-$(CONFIG_DRIVERS_UART) += uart.c
+
+################################################################################
+
+CPPFLAGS_common += -Isrc/soc/mediatek/mt8173/include
+
+endif
diff --git a/src/soc/mediatek/mt8173/bootblock.c b/src/soc/mediatek/mt8173/bootblock.c
new file mode 100644
index 0000000000..232a655583
--- /dev/null
+++ b/src/soc/mediatek/mt8173/bootblock.c
@@ -0,0 +1,24 @@
+/*
+ * 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.
+ *
+ * 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 <bootblock_common.h>
+
+void bootblock_soc_init(void)
+{
+}
diff --git a/src/soc/mediatek/mt8173/cbfs.c b/src/soc/mediatek/mt8173/cbfs.c
new file mode 100644
index 0000000000..71f7ef520c
--- /dev/null
+++ b/src/soc/mediatek/mt8173/cbfs.c
@@ -0,0 +1,25 @@
+/*
+ * 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.
+ *
+ * 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 <boot_device.h>
+
+const struct region_device *boot_device_ro(void)
+{
+	return NULL;
+}
diff --git a/src/soc/mediatek/mt8173/cbmem.c b/src/soc/mediatek/mt8173/cbmem.c
new file mode 100644
index 0000000000..9a8ae7c426
--- /dev/null
+++ b/src/soc/mediatek/mt8173/cbmem.c
@@ -0,0 +1,27 @@
+/*
+ * 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.
+ *
+ * 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 <cbmem.h>
+#include <stddef.h>
+#include <symbols.h>
+
+void *cbmem_top(void)
+{
+	return (void *)((uintptr_t) _dram + (CONFIG_DRAM_SIZE_MB << 20));
+}
diff --git a/src/soc/mediatek/mt8173/include/soc/addressmap.h b/src/soc/mediatek/mt8173/include/soc/addressmap.h
new file mode 100644
index 0000000000..37a22abbaf
--- /dev/null
+++ b/src/soc/mediatek/mt8173/include/soc/addressmap.h
@@ -0,0 +1,62 @@
+/*
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef __SOC_MEDIATEK_MT8173_INCLUDE_SOC_ADDRESS_MAP_H__
+#define __SOC_MEDIATEK_MT8173_INCLUDE_SOC_ADDRESS_MAP_H__
+
+#include <stddef.h>
+#include <stdint.h>
+
+enum {
+	VER_BASE	= 0x08000000,
+	IO_PHYS		= 0x10000000,
+	DDR_BASE	= 0x40000000
+};
+
+enum {
+	CKSYS_BASE		= IO_PHYS,
+	INFRACFG_AO_BASE	= IO_PHYS + 0x1000,
+	PERI_CON_BASE		= IO_PHYS + 0x3000,
+	CHA_DRAMCAO_BASE	= IO_PHYS + 0x4000,
+	GPIO_BASE		= IO_PHYS + 0x5000,
+	SPM_BASE		= IO_PHYS + 0x6000,
+	RGU_BASE		= IO_PHYS + 0x7000,
+	GPT_BASE		= IO_PHYS + 0x8000,
+	PMIC_WRAP_BASE		= IO_PHYS + 0xD000,
+	CHA_DDRPHY_BASE		= IO_PHYS + 0xF000,
+	CHB_DRAMCAO_BASE	= IO_PHYS + 0x11000,
+	CHB_DDRPHY_BASE		= IO_PHYS + 0x12000,
+	MCUCFG_BASE		= IO_PHYS + 0x200000,
+	EMI_BASE		= IO_PHYS + 0x203000,
+	EFUSE_BASE		= IO_PHYS + 0x206000,
+	APMIXED_BASE		= IO_PHYS + 0x209000,
+	CHA_DRAMCNAO_BASE	= IO_PHYS + 0x20E000,
+	CHB_DRAMCNAO_BASE	= IO_PHYS + 0x213000,
+	ANA_MIPI_CS1_BASE	= IO_PHYS + 0x218000,
+	UART0_BASE		= IO_PHYS + 0x1002000,
+	SPI_BASE		= IO_PHYS + 0x100A000,
+	I2C_BASE		= IO_PHYS + 0x1007000,
+	I2C_DMA_BASE		= IO_PHYS + 0x1000080,
+	SFLASH_REG_BASE		= IO_PHYS + 0x100D000,
+	SSUSB_MAC_BASE		= IO_PHYS + 0x1270000,
+	SSUSB_IPPC_BASE		= IO_PHYS + 0x1280700,
+	SSUSB_SIF_BASE		= IO_PHYS + 0x1290800,
+};
+
+#endif /* __SOC_MEDIATEK_MT8173_INCLUDE_SOC_ADDRESS_MAP_H___ */
diff --git a/src/soc/mediatek/mt8173/include/soc/infracfg.h b/src/soc/mediatek/mt8173/include/soc/infracfg.h
new file mode 100644
index 0000000000..576142082a
--- /dev/null
+++ b/src/soc/mediatek/mt8173/include/soc/infracfg.h
@@ -0,0 +1,56 @@
+/*
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef __SOC_MEDIATEK_MT8173_INFRACFG_H__
+#define __SOC_MEDIATEK_MT8173_INFRACFG_H__
+
+#include <soc/addressmap.h>
+#include <types.h>
+
+struct mt8173_infracfg_regs {
+	u32 top_ckmuxsel;
+	u32 reserved0;
+	u32 top_ckdiv1;
+	u32 reserved1;
+	u32 top_dcmctl;
+	u32 top_dcmdbc;
+	u32 reserved2[6];
+	u32 infra_rst0;
+	u32 infra_rst1;
+	u32 reserved3[2];
+	u32 infra_pdn0;
+	u32 infra_pdn1;
+	u32 reserved4[118];
+	u32 topaxi_prot_en;
+	u32 topaxi_prot_sta0;
+	u32 topaxi_prot_sta1;   /* 0x228 */
+};
+
+check_member(mt8173_infracfg_regs, infra_pdn0, 0x40);
+check_member(mt8173_infracfg_regs, topaxi_prot_sta1, 0x228);
+
+static struct mt8173_infracfg_regs *const mt8173_infracfg =
+	(void *)INFRACFG_AO_BASE;
+
+enum {
+	INFRA_PMIC_WRAP_RST = 1 << 7,
+	L2C_SRAM_PDN = 1 << 7
+};
+
+#endif	/* __SOC_MEDIATEK_MT8173_INFRACFG_H__ */
diff --git a/src/soc/mediatek/mt8173/include/soc/mcucfg.h b/src/soc/mediatek/mt8173/include/soc/mcucfg.h
new file mode 100644
index 0000000000..5ac347441c
--- /dev/null
+++ b/src/soc/mediatek/mt8173/include/soc/mcucfg.h
@@ -0,0 +1,111 @@
+/*
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef __SOC_MEDIATEK_MT8173_MCUCFG_H__
+#define __SOC_MEDIATEK_MT8173_MCUCFG_H__
+
+#include <soc/addressmap.h>
+
+struct mt8173_mcucfg_regs {
+	u32 mp0_ca7l_cache_config;
+	struct {
+		u32 mem_delsel0;
+		u32 mem_delsel1;
+	} mp0_cpu[4];
+	u32 mp0_cache_mem_delsel0;
+	u32 mp0_cache_mem_delsel1;
+	u32 mp0_axi_config;
+	u32 mp0_misc_config[10];
+	u32 mp0_ca7l_cfg_dis;
+	u32 mp0_ca7l_clken_ctrl;
+	u32 mp0_ca7l_rst_ctrl;
+	u32 mp0_ca7l_misc_config;
+	u32 mp0_ca7l_dbg_pwr_ctrl;
+	u32 mp0_rw_rsvd0;
+	u32 mp0_rw_rsvd1;
+	u32 mp0_ro_rsvd;
+	u32 reserved0_0[100];
+	u32 mp1_cpucfg;
+	u32 mp1_miscdbg;
+	u32 reserved0_1[13];
+	u32 mp1_rst_ctl;
+	u32 mp1_clkenm_div;
+	u32 reserved0_2[7];
+	u32 mp1_config_res;
+	u32 reserved0_3[101];
+	u32 mp0_rst_status;			/* 0x400 */
+	u32 mp0_dbg_ctrl;
+	u32 mp0_dbg_flag;
+	u32 mp0_ca7l_ir_mon;
+	struct {
+		u32 pc_lw;
+		u32 pc_hw;
+		u32 fp_arch32;
+		u32 sp_arch32;
+		u32 fp_arch64_lw;
+		u32 fp_arch64_hw;
+		u32 sp_arch64_lw;
+		u32 sp_arch64_hw;
+	} mp0_dbg_core[4];
+	u32 dfd_ctrl;
+	u32 dfd_cnt_l;
+	u32 dfd_cnt_h;
+	u32 misccfg_mp0_rw_rsvd;
+	u32 misccfg_sec_vio_status0;
+	u32 misccfg_sec_vio_status1;
+	u32 reserved1[22];
+	u32 misccfg_rw_rsvd;			/* 0x500 */
+	u32 mcusys_dbg_mon_sel_a;
+	u32 mcusys_dbg_mon;
+	u32 reserved2[61];
+	u32 mcusys_config_a;			/* 0x600 */
+	u32 mcusys_config1_a;
+	u32 mcusys_gic_peribase_a;
+	u32 reserved3;
+	u32 sec_range0_start;			/* 0x610 */
+	u32 sec_range0_end;
+	u32 sec_range_enable;
+	u32 reserved4;
+	u32 int_pol_ctl[8];			/* 0x620 */
+	u32 aclken_div;				/* 0x640 */
+	u32 pclken_div;
+	u32 l2c_sram_ctrl;
+	u32 armpll_jit_ctrl;
+	u32 cci_addrmap;			/* 0x650 */
+	u32 cci_config;
+	u32 cci_periphbase;
+	u32 cci_nevntcntovfl;
+	u32 cci_clk_ctrl;			/* 0x660 */
+	u32 cci_acel_s1_ctrl;
+	u32 bus_fabric_dcm_ctrl;
+	u32 reserved5;
+	u32 xgpt_ctl;				/* 0x670 */
+	u32 xgpt_idx;
+	u32 ptpod2_ctl0;
+	u32 ptpod2_ctl1;
+	u32 mcusys_revid;
+	u32 mcusys_rw_rsvd0;
+	u32 mcusys_rw_rsvd1;
+};
+
+check_member(mt8173_mcucfg_regs, mcusys_rw_rsvd1, 0x688);
+
+static struct mt8173_mcucfg_regs * const mt8173_mcucfg = (void *)MCUCFG_BASE;
+
+#endif  /* __SOC_MEDIATEK_MT8173_MCUCFG_H__ */
diff --git a/src/soc/mediatek/mt8173/include/soc/memlayout.ld b/src/soc/mediatek/mt8173/include/soc/memlayout.ld
new file mode 100644
index 0000000000..a703808077
--- /dev/null
+++ b/src/soc/mediatek/mt8173/include/soc/memlayout.ld
@@ -0,0 +1,53 @@
+/*
+ * 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.
+ *
+ * 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 <memlayout.h>
+
+#include <arch/header.ld>
+
+/*
+ * SRAM_L2C is the half part of L2 cache that we borrow it to be used as SRAM.
+ * It will be returned before starting the ramstage.
+ * SRAM_L2C and SRAM can be cached, but only SRAM is DMA-able.
+ */
+#define SRAM_L2C_START(addr) SYMBOL(sram_l2c, addr)
+#define SRAM_L2C_END(addr) SYMBOL(esram_l2c, addr)
+
+SECTIONS
+{
+	SRAM_L2C_START(0x000C0000)
+	BOOTBLOCK(0x000C1000, 85K)
+	VERSTAGE(0x000D7000, 114K)
+	PRERAM_CBFS_CACHE(0x000F6000, 16K)
+	SRAM_L2C_END(0x00100000)
+
+	SRAM_START(0x00100000)
+	VBOOT2_WORK(0x00100000, 12K)
+	PRERAM_CBMEM_CONSOLE(0x00103000, 16K)
+	TIMESTAMP(0x00107000, 4K)
+	ROMSTAGE(0x00108000, 92K)
+	STACK(0x00124000, 16K)
+	TTB(0x00128000, 28K)
+	DMA_COHERENT(0x0012F000, 4K)
+	SRAM_END(0x00130000)
+
+	DRAM_START(0x40000000)
+	POSTRAM_CBFS_CACHE(0x40100000, 1M)
+	RAMSTAGE(0x40200000, 256K)
+}
diff --git a/src/soc/mediatek/mt8173/include/soc/pericfg.h b/src/soc/mediatek/mt8173/include/soc/pericfg.h
new file mode 100644
index 0000000000..d2ea0de505
--- /dev/null
+++ b/src/soc/mediatek/mt8173/include/soc/pericfg.h
@@ -0,0 +1,96 @@
+/*
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef __SOC_MEDIATEK_MT8173_PERICFG_H__
+#define __SOC_MEDIATEK_MT8173_PERICFG_H__
+
+#include <soc/addressmap.h>
+#include <types.h>
+
+struct mt8173_pericfg_regs {
+	u32 rst0;
+	u32 rst1;
+	u32 pdn0_set;
+	u32 pdn1_set;
+	u32 pdn0_clr;
+	u32 pdn1_clr;
+	u32 pdn0_sta;
+	u32 pdn1_sta;
+	u32 pdn_md1_set;
+	u32 pdn_md2_set;
+	u32 pdn_md1_clr;
+	u32 pdn_md2_clr;
+	u32 pdn_md1_sta;
+	u32 pdn_md2_sta;
+	u32 pdn_md_mask;
+	u32 reserved0[5];
+	u32 dcmctl;
+	u32 dcmdbc;
+	u32 dcmfsel;
+	u32 cksel;
+	u32 reserved1[104];
+	u32 axi_bus_ctl1;
+	u32 axi_bus_ctl2;
+	u32 axi_bus_ctl3;
+	u32 axi_si0_ctl;
+	u32 axi_si1_ctl;
+	u32 axi_mi_sta;
+	u32 reserved2[58];
+	u32 axi_ahb_lmt_con1;
+	u32 axi_ahb_lmt_con2;
+	u32 axi_ahb_lmt_con3;
+	u32 axi_ahb_lmt_con4;
+	u32 axi_ahb_lmt_con5;
+	u32 axi_ahb_lmt_con6;
+	u32 reserved3[2];
+	u32 axi_axi_lmt_con1;
+	u32 axi_axi_lmt_con2;
+	u32 axi_axi_lmt_con3;
+	u32 axi_axi_lmt_con4;
+	u32 axi_axi_lmt_con5;
+	u32 axi_axi_lmt_con6;
+	u32 axi_axi_lmt_con7;
+	u32 axi_axi_lmt_con8;
+	u32 axi_axi_lmt_con9;
+	u32 reserved4[47];
+	u32 usb_wakeup_dec_con0;
+	u32 usb_wakeup_dec_con1;
+	u32 usb_wakeup_dec_con2;
+	u32 uart_ck_source_sel;
+	u32 reserved5[1];
+	u32 usb_wakeup_dec_con3a;
+	u32 reserved6[58];
+	u32 ssusb_rst;
+	u32 ssusb_pdn_set;
+	u32 ssusb_pdn_clr;
+	u32 ssusb_pdn_sta;
+};
+
+static struct mt8173_pericfg_regs * const mt8173_pericfg =
+					(void *)PERI_CON_BASE;
+
+/*
+ * UART power down control
+ */
+
+enum {
+        PERICFG_UART0_PDN = 1 << 19
+};
+
+#endif	/* __SOC_MEDIATEK_MT8173_PERICFG_H__ */
diff --git a/src/soc/mediatek/mt8173/include/soc/spm.h b/src/soc/mediatek/mt8173/include/soc/spm.h
new file mode 100644
index 0000000000..a4d6d64b13
--- /dev/null
+++ b/src/soc/mediatek/mt8173/include/soc/spm.h
@@ -0,0 +1,163 @@
+/*
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef __SOC_MEDIATEK_MT8173_SPM_H__
+#define __SOC_MEDIATEK_MT8173_SPM_H__
+
+#include <soc/addressmap.h>
+#include <stddef.h>
+
+enum {
+	SPM_PROJECT_CODE = 0xb16
+};
+
+struct mt8173_spm_regs {
+	u32 poweron_config_set;
+	u32 reserved1[3];
+	u32 power_on_val0;		/* 0x010 */
+	u32 power_on_val1;
+	u32 reserved2[58];
+	u32 clk_settle;			/* 0x100 */
+	u32 reserved3[63];
+	u32 ca7_cpu0_pwr_con;		/* 0x200 */
+	u32 ca7_dbg_pwr_con;
+	u32 ca7_cputop_pwr_con;
+	u32 reserved4;
+	u32 vde_pwr_con;		/* 0x210 */
+	u32 mfg_pwr_con;
+	u32 ca7_cpu1_pwr_con;		/* 0x218 */
+	u32 ca7_cpu2_pwr_con;
+	u32 ca7_cpu3_pwr_con;		/* 0x220 */
+	u32 reserved5[3];
+	u32 ven_pwr_con;		/* 0x230 */
+	u32 ifr_pwr_con;
+	u32 isp_pwr_con;
+	u32 dis_pwr_con;
+	u32 dpy_pwr_con;		/* 0x240 */
+	u32 ca7_cputop_l2_pdn;		/* 0x244 */
+	u32 ca7_cputop_l2_sleep;
+	u32 reserved6[4];
+	struct {			/* 0x25c */
+		u32 l1_pdn;
+		u32 reserved;
+	} ca7_cpu[4];
+	u32 gcpu_sram_con;		/* 0x27c */
+	u32 dpy2_pwr_con;		/* 0x280 */
+	u32 md_pwr_con;
+	u32 reserved11[2];
+	u32 mcu_pwr_con;		/* 0x290 */
+	u32 ifr_sramrom_con;
+	u32 mjc_pwr_con;
+	u32 audio_pwr_con;
+	u32 ca15_cpu_pwr_con[4];	/* 0x2a0 */
+	u32 ca15_cputop_pwr_con;	/* 0x2b0 */
+	u32 ca15_l1_pwr_con;		/* 0x2b4 */
+	u32 ca15_l2_pwr_con;		/* 0x2b8 */
+	u32 reserved12;
+	u32 mfg_2d_pwr_con;		/* 0x2c0 */
+	u32 mfg_async_pwr_con;
+	u32 vpu_sram_con;
+	u32 reserved13[17];
+	u32 pcm_con0;			/* 0x310 */
+	u32 pcm_con1;
+	u32 pcm_im_ptr;
+	u32 pcm_im_len;
+	u32 pcm_reg_data_ini;		/* 0x320 */
+	u32 reserved14[7];
+	u32 pcm_event_vector0;		/* 0x340 */
+	u32 pcm_event_vector1;
+	u32 pcm_event_vector2;
+	u32 pcm_event_vector3;
+	u32 reserved15;
+	u32 pcm_mas_pause_mask;		/* 0x354 */
+	u32 pcm_pwr_io_en;
+	u32 pcm_timer_val;
+	u32 pcm_timer_out;
+	u32 reserved16[7];
+	u32 pcm_reg_data[16];		/* 0x380 */
+	u32 pcm_event_reg_sta;
+	u32 pcm_fsm_sta;
+	u32 pcm_im_host_rw_ptr;
+	u32 pcm_im_host_rw_dat;
+	u32 pcm_event_vector4;
+	u32 pcm_event_vector5;
+	u32 pcm_event_vector6;
+	u32 pcm_event_vector7;
+	u32 pcm_sw_int_set;
+	u32 pcm_sw_int_clear;
+	u32 reserved17[6];
+	u32 clk_con;			/* 0x400 */
+	u32 sleep_dual_vcore_pwr_con;	/* 0x404 */
+	u32 sleep_ptpod2_con;
+	u32 reserved18[125];
+	u32 apmcu_pwrctl;		/* 0x600 */
+	u32 ap_dvfs_con_set;
+	u32 ap_stanby_con;
+	u32 pwr_status;			/* 0x60c */
+	u32 pwr_status_2nd;		/* 0x610 */
+	u32 ap_bsi_req;
+	u8 reserved19[0x720 - 0x618];
+	u32 sleep_timer_sta;		/* 0x720 */
+	u32 reserved20[15];
+	u32 sleep_twam_con;		/* 0x760 */
+	u32 sleep_twam_status0;
+	u32 sleep_twam_status1;
+	u32 sleep_twam_status2;
+	u32 sleep_twam_status3;		/* 0x770 */
+	u32 reserved21[39];
+	u32 sleep_wakeup_event_mask;	/* 0x810 */
+	u32 sleep_cpu_wakeup_event;
+	u32 sleep_md32_wakeup_event_mask;
+	u32 reserved22[2];
+	u32 pcm_wdt_timer_val;		/* 0x824 */
+	u32 pcm_wdt_timer_out;
+	u32 reserved23;
+	u32 pcm_md32_mailbox;		/* 0x830 */
+	u32 pcm_md32_irq;
+	u32 reserved24[50];
+	u32 sleep_isr_mask;		/* 0x900 */
+	u32 sleep_isr_status;
+	u32 reserved25[2];
+	u32 sleep_isr_raw_sta;		/* 0x910 */
+	u32 sleep_md32_isr_raw_sta;
+	u32 sleep_wakeup_misc;
+	u32 sleep_bus_protect_rdy;
+	u32 sleep_subsys_idle_sta;	/* 0x920 */
+	u8 reserved26[0xb00 - 0x924];
+	u32 pcm_reserve;		/* 0xb00 */
+	u32 pcm_reserve2;
+	u32 pcm_flags;
+	u32 pcm_src_req;
+	u32 reserved27[4];
+	u32 pcm_debug_con;		/* 0xb20 */
+	u32 reserved28[3];
+	u32 ca7_cpu_irq_mask[4];	/* 0xb30 */
+	u32 ca15_cpu_irq_mask[4];
+	u32 reserved29[4];
+	u32 pcm_pasr_dpd[4];		/* 0xb60 */
+	u8 reserved30[0xf00 - 0xb70];
+	u32 sleep_ca7_wfi_en[4];	/* 0xf00 */
+	u32 sleep_ca15_wfi_en[4];
+};
+
+check_member(mt8173_spm_regs, sleep_ca15_wfi_en[3], 0xf1c);
+
+static struct mt8173_spm_regs * const mt8173_spm = (void *)SPM_BASE;
+
+#endif  /* __SOC_MEDIATEK_MT8173_SPM_H__ */
diff --git a/src/soc/mediatek/mt8173/include/soc/timer.h b/src/soc/mediatek/mt8173/include/soc/timer.h
new file mode 100644
index 0000000000..b38feb0e9a
--- /dev/null
+++ b/src/soc/mediatek/mt8173/include/soc/timer.h
@@ -0,0 +1,75 @@
+/*
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef __SOC_MEDIATEK_MT8173_TIMER_H__
+#define __SOC_MEDIATEK_MT8173_TIMER_H__
+
+#include <soc/addressmap.h>
+#include <types.h>
+
+struct mt8173_gpt_regs {
+	u32 irqen;
+	u32 irqsta;
+	u32 irqack;
+	u32 reserved0;
+	u32 gpt1_con;
+	u32 gpt1_clk;
+	u32 gpt1_cnt;
+	u32 gpt1_compare;
+	u32 gpt2_con;
+	u32 gpt2_clk;
+	u32 gpt2_cnt;
+	u32 gpt2_compare;
+	u32 gpt3_con;
+	u32 gpt3_clk;
+	u32 gpt3_cnt;
+	u32 gpt3_compare;
+	u32 gpt4_con;
+	u32 gpt4_clk;
+	u32 gpt4_cnt;
+	u32 gpt4_compare;
+	u32 gpt5_con;
+	u32 gpt5_clk;
+	u32 gpt5_cnt;
+	u32 gpt5_compare;
+	u32 gpt6_con;
+	u32 gpt6_clk;
+	u32 gpt6_cntl;
+	u32 gpt6_comparel;
+	u32 reserved1[2];
+	u32 gpt6_cnth;
+	u32 gpt6_compareh;
+	u32 apxgpt_irqmask;
+	u32 apxgpt_irqmask1;
+};
+
+static struct mt8173_gpt_regs * const mt8173_gpt = (void *)GPT_BASE;
+
+enum {
+	GPT_CON_EN = 0x01,
+	GPT_CON_CLR = 0x02,
+	GPT_MODE_ONE_SHOT = 0x00,
+	GPT_MODE_REPEAT   = 0x10,
+	GPT_MODE_KEEP_GO  = 0x20,
+	GPT_MODE_FREERUN  = 0x30,
+	GPT_SYS_CLK = 0x00,
+	GPT_SYS_RTC = 0x01,
+};
+
+#endif	/* __SOC_MEDIATEK_MT8173_TIMER_H__ */
diff --git a/src/soc/mediatek/mt8173/soc.c b/src/soc/mediatek/mt8173/soc.c
new file mode 100644
index 0000000000..643c622f1f
--- /dev/null
+++ b/src/soc/mediatek/mt8173/soc.c
@@ -0,0 +1,49 @@
+/*
+ * 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.
+ *
+ * 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 <cpu/cpu.h>
+#include <console/console.h>
+#include <device/device.h>
+
+#include <symbols.h>
+
+static void soc_read_resources(device_t dev)
+{
+	ram_resource(dev, 0, (uintptr_t)_dram / KiB,
+		     CONFIG_DRAM_SIZE_MB * KiB);
+}
+
+static void soc_init(device_t dev)
+{
+}
+
+static struct device_operations soc_ops = {
+	.read_resources = soc_read_resources,
+	.init = soc_init,
+};
+
+static void enable_soc_dev(device_t dev)
+{
+	dev->ops = &soc_ops;
+}
+
+struct chip_operations soc_mediatek_mt8173_ops = {
+	CHIP_NAME("SOC Mediatek MT8173\n")
+	    .enable_dev = enable_soc_dev,
+};
diff --git a/src/soc/mediatek/mt8173/timer.c b/src/soc/mediatek/mt8173/timer.c
new file mode 100644
index 0000000000..d23c230ac3
--- /dev/null
+++ b/src/soc/mediatek/mt8173/timer.c
@@ -0,0 +1,65 @@
+/*
+ * 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.
+ *
+ * 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 <console/console.h>
+#include <timer.h>
+#include <delay.h>
+#include <thread.h>
+
+#include <soc/addressmap.h>
+#include <soc/mcucfg.h>
+#include <soc/timer.h>
+
+#define GPT4_MHZ	13
+
+void timer_monotonic_get(struct mono_time *mt)
+{
+        mono_time_set_usecs(mt, read32(&mt8173_gpt->gpt4_cnt) / GPT4_MHZ);
+}
+
+/**
+ * init_timer - initialize timer
+ */
+void init_timer(void)
+{
+	/* Set XGPT_IDX to 0, then the bit field of XGPT_CTL will be programmed
+	 * with following definition.
+	 *
+	 * [10: 8] Clock mode
+	 *         100: 26Mhz / 4
+	 *         010: 26Mhz / 2
+	 *         001: 26Mhz
+	 * [ 1: 1] Halt-on-debug enable bit
+	 * [ 0: 0] XGPT enable bit
+	 */
+	write32(&mt8173_mcucfg->xgpt_idx, 0);
+	/* Set clock mode to 13Mhz and enable XGPT */
+	write32(&mt8173_mcucfg->xgpt_ctl, (0x1 | ((26 / GPT4_MHZ) << 8)));
+
+	/* Disable GPT4 and clear the counter */
+	clrbits_le32(&mt8173_gpt->gpt4_con, GPT_CON_EN);
+	setbits_le32(&mt8173_gpt->gpt4_con, GPT_CON_CLR);
+
+	/* Set clock source to system clock and set clock divider to 1 */
+	write32(&mt8173_gpt->gpt4_clk, GPT_SYS_CLK | 0x0);
+	/* Set operation mode to FREERUN mode and enable GTP4 */
+	write32(&mt8173_gpt->gpt4_con, GPT_CON_EN | GPT_MODE_FREERUN);
+}
+
diff --git a/src/soc/mediatek/mt8173/uart.c b/src/soc/mediatek/mt8173/uart.c
new file mode 100644
index 0000000000..bd239c7990
--- /dev/null
+++ b/src/soc/mediatek/mt8173/uart.c
@@ -0,0 +1,189 @@
+/*
+ * 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.
+ *
+ * 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 <boot/coreboot_tables.h>
+#include <console/console.h>	/* for __console definition */
+#include <console/uart.h>
+#include <drivers/uart/uart8250reg.h>
+#include <stdint.h>
+
+#include <soc/addressmap.h>
+
+struct mtk_uart {
+	union {
+		uint32_t thr;	/* Transmit holding register. */
+		uint32_t rbr;	/* Receive buffer register. */
+		uint32_t dll;	/* Divisor latch lsb. */
+	};
+	union {
+		uint32_t ier;	/* Interrupt enable register. */
+		uint32_t dlm;	/* Divisor latch msb. */
+	};
+	union {
+		uint32_t iir;	/* Interrupt identification register. */
+		uint32_t fcr;	/* FIFO control register. */
+		uint32_t efr;	/* Enhanced feature register. */
+	};
+	uint32_t lcr;		/* Line control register. */
+	union {
+		uint32_t mcr;	/* Modem control register. */
+		uint32_t xn1;	/* XON1 */
+	};
+	union {
+		uint32_t lsr;	/* Line status register. */
+		uint32_t xn2;	/* XON2 */
+	};
+	union {
+		uint32_t msr;	/* Modem status register. */
+		uint32_t xf1;	/* XOFF1 */
+	};
+	union {
+		uint32_t scr;	/* Scratch register. */
+		uint32_t xf2;	/* XOFF2 */
+	};
+	uint32_t autobaud_en;	/* Enable auto baudrate. */
+	uint32_t highspeed;	/* High speed UART. */
+} __attribute__ ((packed));
+
+/* Peripheral Reset and Power Down registers */
+struct mtk_peri_globalcon {
+	uint32_t rst0;
+	uint32_t rst1;
+	uint32_t pdn0_set;
+	uint32_t pdn1_set;
+	uint32_t pdn0_clr;
+	uint32_t pdn1_clr;
+	uint32_t pdn0_sta;
+	uint32_t pdn1_sta;
+	uint32_t pdn_md1_set;
+	uint32_t pdn_md2_set;
+	uint32_t pdn_md1_clr;
+	uint32_t pdn_md2_clr;
+	uint32_t pdn_md1_sta;
+	uint32_t pdn_md2_sta;
+	uint32_t pdn_md_mask;
+} __attribute__ ((packed));
+
+static struct mtk_uart *const uart_ptr = (void *)UART0_BASE;
+
+static void mtk_uart_tx_flush(void);
+static int mtk_uart_tst_byte(void);
+
+static void mtk_uart_init(void)
+{
+	/* Use a hardcoded divisor for now. */
+	const unsigned uartclk = 26 * MHz;
+	const unsigned baudrate = CONFIG_TTYS0_BAUD;
+	const uint8_t line_config = UART8250_LCR_WLS_8;	/* 8n1 */
+	unsigned highspeed, quot, divisor, remainder;
+
+	if (baudrate <= 115200) {
+		highspeed = 0;
+		quot = 16;
+	} else {
+		highspeed = 2;
+		quot = 4;
+	}
+
+	/* Set divisor DLL and DLH  */
+	divisor = uartclk / (quot * baudrate);
+	remainder = uartclk % (quot * baudrate);
+
+	if (remainder >= (quot / 2) * baudrate)
+		divisor += 1;
+
+	mtk_uart_tx_flush();
+
+	/* Disable interrupts. */
+	write8(&uart_ptr->ier, 0);
+	/* Force DTR and RTS to high. */
+	write8(&uart_ptr->mcr, UART8250_MCR_DTR | UART8250_MCR_RTS);
+	/* Set High speed UART register. */
+	write8(&uart_ptr->highspeed, highspeed);
+	/* Set line configuration, access divisor latches. */
+	write8(&uart_ptr->lcr, UART8250_LCR_DLAB | line_config);
+	/* Set the divisor. */
+	write8(&uart_ptr->dll, divisor & 0xff);
+	write8(&uart_ptr->dlm, (divisor >> 8) & 0xff);
+	/* Hide the divisor latches. */
+	write8(&uart_ptr->lcr, line_config);
+	/* Enable FIFOs, and clear receive and transmit. */
+	write8(&uart_ptr->fcr,
+	       UART8250_FCR_FIFO_EN | UART8250_FCR_CLEAR_RCVR |
+               UART8250_FCR_CLEAR_XMIT);
+
+}
+
+static void mtk_uart_tx_byte(unsigned char data)
+{
+	while (!(read8(&uart_ptr->lsr) & UART8250_LSR_THRE));
+	write8(&uart_ptr->thr, data);
+}
+
+static void mtk_uart_tx_flush(void)
+{
+	while (!(read8(&uart_ptr->lsr) & UART8250_LSR_TEMT));
+}
+
+static unsigned char mtk_uart_rx_byte(void)
+{
+	if (!mtk_uart_tst_byte())
+		return 0;
+	return read8(&uart_ptr->rbr);
+}
+
+static int mtk_uart_tst_byte(void)
+{
+	return (read8(&uart_ptr->lsr) & UART8250_LSR_DR) == UART8250_LSR_DR;
+}
+
+void uart_init(int idx)
+{
+	mtk_uart_init();
+}
+
+unsigned char uart_rx_byte(int idx)
+{
+	return mtk_uart_rx_byte();
+}
+
+void uart_tx_byte(int idx, unsigned char data)
+{
+	mtk_uart_tx_byte(data);
+}
+
+void uart_tx_flush(int idx)
+{
+	mtk_uart_tx_flush();
+}
+
+#ifndef __PRE_RAM__
+void uart_fill_lb(void *data)
+{
+	struct lb_serial serial;
+	serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED;
+	serial.baseaddr = UART0_BASE;
+	serial.baud = default_baudrate();
+	serial.regwidth = 1;
+	lb_add_serial(&serial, data);
+
+	lb_add_console(LB_TAG_CONSOLE_SERIAL8250MEM, data);
+}
+#endif