ARM: MediaTek: Add support for MediaTek MT8512 SoC

Add support for MediaTek MT8512 SoC. This include the file
that will initialize the SoC after boot and its device tree.

Signed-off-by: mingming lee <mingming.lee@mediatek.com>

arch/arm/dts/mt8512.dtsi

@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2019 MediaTek Inc.
+ * Author: Mingming Lee <mingming.lee@mediatek.com>
+ *
+ */
+
+#include <dt-bindings/clock/mt8512-clk.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	compatible = "mediatek,mt8512";
+	interrupt-parent = <&sysirq>;
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	gic: interrupt-controller@c000000 {
+		 compatible = "arm,gic-v3";
+		#interrupt-cells = <3>;
+		interrupt-parent = <&gic>;
+		interrupt-controller;
+		reg = <0xc000000 0x40000>,	/* GICD */
+			  <0xc080000 0x200000>; /* GICR */
+		interrupts = <GIC_PPI 9
+			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
+	};
+
+	topckgen: clock-controller@10000000 {
+		compatible = "mediatek,mt8512-topckgen";
+		reg = <0x10000000 0x1000>;
+		#clock-cells = <1>;
+	};
+
+	topckgen_cg: clock-controller-cg@10000000 {
+		compatible = "mediatek,mt8512-topckgen-cg";
+		reg = <0x10000000 0x1000>;
+		#clock-cells = <1>;
+	};
+
+	infracfg: clock-controller@10001000 {
+		compatible = "mediatek,mt8512-infracfg";
+		reg = <0x10001000 0x1000>;
+		#clock-cells = <1>;
+	};
+
+	pinctrl: pinctrl@10005000 {
+		compatible = "mediatek,mt8512-pinctrl";
+		reg = <0x10005000 0x1000>;
+		gpio: gpio-controller {
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+	};
+
+	watchdog0: watchdog@10007000 {
+		compatible = "mediatek,wdt";
+		reg = <0x10007000 0x1000>;
+		interrupts = <GIC_SPI 190 IRQ_TYPE_EDGE_FALLING>;
+		#reset-cells = <1>;
+		status = "disabled";
+		timeout-sec = <60>;
+		reset-on-timeout;
+	};
+
+	timer0: apxgpt@10008000 {
+		compatible = "mediatek,timer";
+		reg = <0x10008000 0x1000>;
+		interrupts = <GIC_SPI 138 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&topckgen CLK_TOP_SYS_26M_D2>,
+			 <&topckgen CLK_TOP_CLK32K>,
+			 <&infracfg CLK_INFRA_APXGPT>;
+		clock-names = "clk13m",
+			 "clk32k",
+			 "bus";
+	};
+
+	apmixedsys: clock-controller@1000c000 {
+		compatible = "mediatek,mt8512-apmixedsys";
+		reg = <0x1000c000 0x1000>;
+		#clock-cells = <1>;
+	};
+
+	sysirq: interrupt-controller@10200a80 {
+		compatible = "mediatek,sysirq";
+		interrupt-controller;
+		#interrupt-cells = <3>;
+		interrupt-parent = <&gic>;
+		reg = <0x10200a80 0x50>;
+	};
+
+	uart0: serial@11002000 {
+		compatible = "mediatek,hsuart";
+		reg = <0x11002000 0x1000>;
+		interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&topckgen CLK_TOP_CLK26M>,
+			<&infracfg CLK_INFRA_UART0>;
+		clock-names = "baud", "bus";
+		status = "disabled";
+	};
+
+	mmc0: mmc@11230000 {
+		compatible = "mediatek,mt8512-mmc";
+		reg = <0x11230000 0x1000>,
+		      <0x11cd0000 0x1000>;
+		interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&topckgen CLK_TOP_MSDC50_0_SEL>,
+			 <&infracfg CLK_INFRA_MSDC0>,
+			 <&infracfg CLK_INFRA_MSDC0_SRC>;
+		clock-names = "source", "hclk", "source_cg";
+		status = "disabled";
+	};
+
+};

arch/arm/mach-mediatek/Kconfig

@@ -6,6 +6,10 @@ config SYS_SOC
 config SYS_VENDOR
 	default "mediatek"
 
+config MT8512
+	bool "MediaTek MT8512 SoC"
+	default n
+
 choice
 	prompt "MediaTek board select"
 
@@ -29,6 +33,16 @@ config TARGET_MT7629
 	  including DDR3, crypto engine, 3x3 11n/ac Wi-Fi, Gigabit Ethernet,
 	  switch, USB3.0, PCIe, UART, SPI, I2C and PWM.
 
+config TARGET_MT8512
+        bool "MediaTek MT8512 M1 Board"
+        select ARM64
+	select MT8512
+        help
+          The MediaTek MT8512 is a ARM64-based SoC with a quad-core Cortex-A53.
+          including UART, SPI, USB2.0 and OTG, SD and MMC cards, NAND, PWM,
+          Ethernet, IR TX/RX, I2C, I2S, S/PDIF, and built-in Wi-Fi / Bluetooth combo
+          chip and several DDR3 and DDR4 options.
+
 config TARGET_MT8516
 	bool "MediaTek MT8516 SoC"
 	select ARM64
@@ -51,6 +65,7 @@ endchoice
 
 source "board/mediatek/mt7623/Kconfig"
 source "board/mediatek/mt7629/Kconfig"
+source "board/mediatek/mt8512/Kconfig"
 source "board/mediatek/mt8518/Kconfig"
 source "board/mediatek/pumpkin/Kconfig"
 

arch/arm/mach-mediatek/Makefile

@@ -3,6 +3,7 @@
 obj-y	+= cpu.o
 obj-$(CONFIG_SPL_BUILD)	+= spl.o
 
+obj-$(CONFIG_MT8512) += mt8512/
 obj-$(CONFIG_TARGET_MT7623) += mt7623/
 obj-$(CONFIG_TARGET_MT7629) += mt7629/
 obj-$(CONFIG_TARGET_MT8516) += mt8516/

arch/arm/mach-mediatek/mt8512/Makefile

@@ -0,0 +1,4 @@
+# SPDX-License-Identifier:	GPL-2.0
+
+obj-y += init.o
+obj-y += lowlevel_init.o

arch/arm/mach-mediatek/mt8512/init.c

@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Configuration for MediaTek MT8512 SoC
+ *
+ * Copyright (C) 2019 MediaTek Inc.
+ * Author: Mingming Lee <mingming.lee@mediatek.com>
+ */
+
+#include <clk.h>
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <ram.h>
+#include <wdt.h>
+#include <asm/arch/misc.h>
+#include <asm/armv8/mmu.h>
+#include <asm/sections.h>
+#include <dm/uclass.h>
+#include <dt-bindings/clock/mt8512-clk.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+	return fdtdec_setup_mem_size_base();
+}
+
+phys_size_t  get_effective_memsize(void)
+{
+	/* limit stack below tee reserve memory */
+	return gd->ram_size - 6 * SZ_1M;
+}
+
+int dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = gd->ram_base;
+	gd->bd->bi_dram[0].size = get_effective_memsize();
+
+	return 0;
+}
+
+void reset_cpu(ulong addr)
+{
+	struct udevice *watchdog_dev = NULL;
+
+	if (uclass_get_device_by_seq(UCLASS_WDT, 0, &watchdog_dev))
+		if (uclass_get_device(UCLASS_WDT, 0, &watchdog_dev))
+			psci_system_reset();
+
+	wdt_expire_now(watchdog_dev, 0);
+}
+
+int print_cpuinfo(void)
+{
+	debug("CPU:   MediaTek MT8512\n");
+	return 0;
+}
+
+static struct mm_region mt8512_mem_map[] = {
+	{
+		/* DDR */
+		.virt = 0x40000000UL,
+		.phys = 0x40000000UL,
+		.size = 0x40000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | PTE_BLOCK_OUTER_SHARE,
+	}, {
+		.virt = 0x00000000UL,
+		.phys = 0x00000000UL,
+		.size = 0x40000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE |
+			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
+	}, {
+		0,
+	}
+};
+
+struct mm_region *mem_map = mt8512_mem_map;

arch/arm/mach-mediatek/mt8512/lowlevel_init.S

@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2019 MediaTek Inc.
+ * Author: Mingming Lee <mingming.lee@mediatek.com>
+ */
+
+/*
+ * Switch from AArch64 EL2 to AArch32 EL2
+ * @param inputs:
+ * x0: argument, zero
+ * x1: machine nr
+ * x2: fdt address
+ * x3: input argument
+ * x4: kernel entry point
+ * @param outputs for secure firmware:
+ * x0: function id
+ * x1: kernel entry point
+ * x2: machine nr
+ * x3: fdt address
+*/
+.global armv8_el2_to_aarch32
+armv8_el2_to_aarch32:
+	mov     x3, x2
+	mov     x2, x1
+	mov     x1, x4
+	mov	x4, #0
+	/* Define in src\bsp\trustzone\atf\v1.2\ */
+	/* mt8xxx\plat\mediatek\common\sip_svc.h */
+	/* MTK_SIP_KERNEL_BOOT_AARCH64 for U-BOOT-64 to KERNEL*/
+	ldr x0, =0xC2000200
+	SMC #0
+	ret