arm: bcmbca: add bcm63146 SoC support

BCM63146 is a Broadcom B53 based DSL Broadband SoC. It is part of the
BCA (Broadband Carrier Access origin) chipset family so it's added under
ARCH_BCMBCA platform. This initial support includes a bare-bone
implementation and dts with CPU subsystem, memory and ARM PL011 uart.

This SoC is supported in the linux-next git repository so the dts and
dtsi files are copied from linux.

The u-boot image can be loaded from flash or network to the entry point
address in the memory and boot from there to the console.

Signed-off-by: William Zhang <william.zhang@broadcom.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>

MAINTAINERS

@@ -219,6 +219,7 @@ F:	board/broadcom/bcmbca/
 N:	bcmbca
 N:	bcm[9]?47622
 N:	bcm[9]?63138
+N:	bcm[9]?63146
 N:	bcm[9]?63148
 N:	bcm[9]?63178
 N:	bcm[9]?6756

arch/arm/dts/Makefile

@@ -1184,6 +1184,8 @@ dtb-$(CONFIG_BCM47622) += \
 	bcm947622.dtb
 dtb-$(CONFIG_BCM63138) += \
 	bcm963138.dtb
+dtb-$(CONFIG_BCM63146) += \
+	bcm963146.dtb
 dtb-$(CONFIG_BCM63148) += \
 	bcm963148.dtb
 dtb-$(CONFIG_BCM63178) += \

arch/arm/dts/bcm63146.dtsi

@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2022 Broadcom Ltd.
+ */
+
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	compatible = "brcm,bcm63146", "brcm,bcmbca";
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	interrupt-parent = <&gic>;
+
+	cpus {
+		#address-cells = <2>;
+		#size-cells = <0>;
+
+		B53_0: cpu@0 {
+			compatible = "brcm,brahma-b53";
+			device_type = "cpu";
+			reg = <0x0 0x0>;
+			next-level-cache = <&L2_0>;
+			enable-method = "psci";
+		};
+
+		B53_1: cpu@1 {
+			compatible = "brcm,brahma-b53";
+			device_type = "cpu";
+			reg = <0x0 0x1>;
+			next-level-cache = <&L2_0>;
+			enable-method = "psci";
+		};
+
+		L2_0: l2-cache0 {
+			compatible = "cache";
+		};
+	};
+
+	timer {
+		compatible = "arm,armv8-timer";
+		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
+			<GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
+			<GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
+			<GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>;
+	};
+
+	pmu: pmu {
+		compatible = "arm,cortex-a53-pmu";
+		interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
+			<GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-affinity = <&B53_0>, <&B53_1>;
+	};
+
+	clocks: clocks {
+		periph_clk: periph-clk {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <200000000>;
+		};
+		uart_clk: uart-clk {
+			compatible = "fixed-factor-clock";
+			#clock-cells = <0>;
+			clocks = <&periph_clk>;
+			clock-div = <4>;
+			clock-mult = <1>;
+		};
+	};
+
+	psci {
+		compatible = "arm,psci-0.2";
+		method = "smc";
+	};
+
+	axi@81000000 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x0 0x0 0x81000000 0x8000>;
+
+		gic: interrupt-controller@1000 {
+			compatible = "arm,gic-400";
+			#interrupt-cells = <3>;
+			interrupt-controller;
+			reg = <0x1000 0x1000>,
+				<0x2000 0x2000>,
+				<0x4000 0x2000>,
+				<0x6000 0x2000>;
+			interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(2) |
+					IRQ_TYPE_LEVEL_HIGH)>;
+		};
+	};
+
+	bus@ff800000 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x0 0x0 0xff800000 0x800000>;
+
+		uart0: serial@12000 {
+			compatible = "arm,pl011", "arm,primecell";
+			reg = <0x12000 0x1000>;
+			interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&uart_clk>, <&uart_clk>;
+			clock-names = "uartclk", "apb_pclk";
+			status = "disabled";
+		};
+	};
+};

arch/arm/dts/bcm963146.dts

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright 2022 Broadcom Ltd.
+ */
+
+/dts-v1/;
+
+#include "bcm63146.dtsi"
+
+/ {
+	model = "Broadcom BCM963146 Reference Board";
+	compatible = "brcm,bcm963146", "brcm,bcm63146", "brcm,bcmbca";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x0 0x0 0x08000000>;
+	};
+};
+
+&uart0 {
+	status = "okay";
+};

arch/arm/mach-bcmbca/Kconfig

@@ -20,6 +20,13 @@ config BCM63138
 	select DM_SERIAL
 	select BCM6345_SERIAL
 
+config BCM63146
+	bool "Support for Broadcom 63146 Family"
+	select ARM64
+	select SYS_ARCH_TIMER
+	select DM_SERIAL
+	select PL01X_SERIAL
+
 config BCM63148
 	bool "Support for Broadcom 63148 Family"
 	select SYS_ARCH_TIMER
@@ -57,6 +64,7 @@ config BCM6878
 
 source "arch/arm/mach-bcmbca/bcm47622/Kconfig"
 source "arch/arm/mach-bcmbca/bcm63138/Kconfig"
+source "arch/arm/mach-bcmbca/bcm63146/Kconfig"
 source "arch/arm/mach-bcmbca/bcm63148/Kconfig"
 source "arch/arm/mach-bcmbca/bcm63178/Kconfig"
 source "arch/arm/mach-bcmbca/bcm6756/Kconfig"

arch/arm/mach-bcmbca/Makefile

@@ -5,6 +5,7 @@
 
 obj-$(CONFIG_BCM47622) += bcm47622/
 obj-$(CONFIG_BCM63138) += bcm63138/
+obj-$(CONFIG_BCM63146) += bcm63146/
 obj-$(CONFIG_BCM63148) += bcm63148/
 obj-$(CONFIG_BCM63178) += bcm63178/
 obj-$(CONFIG_BCM6756) += bcm6756/

arch/arm/mach-bcmbca/bcm63146/Kconfig

@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2022 Broadcom Ltd
+#
+
+if BCM63146
+
+config TARGET_BCM963146
+	bool "Broadcom 63146 Reference Board"
+	depends on ARCH_BCMBCA
+
+config SYS_SOC
+	default "bcm63146"
+
+source "board/broadcom/bcmbca/Kconfig"
+
+endif

arch/arm/mach-bcmbca/bcm63146/Makefile

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2022 Broadcom Ltd
+#
+obj-y += mmu_table.o

arch/arm/mach-bcmbca/bcm63146/mmu_table.c

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  Copyright 2022 Broadcom Ltd.
+ */
+#include <common.h>
+#include <asm/armv8/mmu.h>
+#include <linux/sizes.h>
+
+static struct mm_region bcm963146_mem_map[] = {
+		{
+				.virt = 0x00000000UL,
+				.phys = 0x00000000UL,
+				.size = 1UL * SZ_1G,
+				.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+						PTE_BLOCK_INNER_SHARE
+		},
+		{
+				/* SoC peripheral */
+				.virt = 0xff800000UL,
+				.phys = 0xff800000UL,
+				.size = 0x100000,
+				.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+						PTE_BLOCK_NON_SHARE |
+						PTE_BLOCK_PXN | PTE_BLOCK_UXN
+		},
+		{
+				/* List terminator */
+				0,
+		}
+};
+
+struct mm_region *mem_map = bcm963146_mem_map;

board/broadcom/bcmbca/Kconfig

@@ -23,6 +23,13 @@ config SYS_CONFIG_NAME
 
 endif
 
+if TARGET_BCM963146
+
+config SYS_CONFIG_NAME
+	default "bcm963146"
+
+endif
+
 if TARGET_BCM963148
 
 config SYS_CONFIG_NAME

configs/bcm963146_defconfig

@@ -0,0 +1,23 @@
+CONFIG_ARM=y
+CONFIG_COUNTER_FREQUENCY=50000000
+CONFIG_ARCH_BCMBCA=y
+CONFIG_SYS_TEXT_BASE=0x01000000
+CONFIG_SYS_MALLOC_LEN=0x2000000
+CONFIG_SYS_MALLOC_F_LEN=0x8000
+CONFIG_BCM63146=y
+CONFIG_TARGET_BCM963146=y
+CONFIG_NR_DRAM_BANKS=2
+CONFIG_DEFAULT_DEVICE_TREE="bcm963146"
+CONFIG_IDENT_STRING=" Broadcom BCM63146"
+CONFIG_SYS_LOAD_ADDR=0x01000000
+CONFIG_ENV_VARS_UBOOT_CONFIG=y
+CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x2000000
+CONFIG_OF_STDOUT_VIA_ALIAS=y
+CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_MAXARGS=64
+CONFIG_SYS_BOOTM_LEN=0x4000000
+CONFIG_CMD_CACHE=y
+CONFIG_OF_EMBED=y
+CONFIG_CLK=y

include/configs/bcm963146.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2022 Broadcom Ltd.
+ */
+
+#ifndef __BCM963146_H
+#define __BCM963146_H
+
+#define CONFIG_SYS_SDRAM_BASE		0x00000000
+
+#endif