airoha: Add initial support for Airoha AN7581 SoC

Add initial support for Airoha AN7581 SoC. This adds the initial Kconfig
and Makefile entry for the SoC, an U-Boot specific DTSI and initial config
for it. Also add the initial code for CPU and RAM initialization.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

arch/arm/Kconfig

@@ -600,6 +600,13 @@ choice
 	prompt "Target select"
 	default TARGET_HIKEY
 
+config ARCH_AIROHA
+	bool "Airoha SoCs"
+	select DM
+	select OF_CONTROL
+	help
+	  Support for the Airoha soc.
+
 config ARCH_AT91
 	bool "Atmel AT91"
 	select GPIO_EXTRA_HEADER
@@ -2251,6 +2258,8 @@ config SYS_KWD_CONFIG
 	  Path within the source directory to the kwbimage.cfg file to use
 	  when packaging the U-Boot image for use.
 
+source "arch/arm/mach-airoha/Kconfig"
+
 source "arch/arm/mach-apple/Kconfig"
 
 source "arch/arm/mach-aspeed/Kconfig"

arch/arm/Makefile

@@ -51,6 +51,7 @@ PLATFORM_CPPFLAGS += $(arch-y) $(tune-y)
 
 # Machine directory name.  This list is sorted alphanumerically
 # by CONFIG_* macro name.
+machine-$(CONFIG_ARCH_AIROHA)		+= airoha
 machine-$(CONFIG_ARCH_APPLE)		+= apple
 machine-$(CONFIG_ARCH_ASPEED)		+= aspeed
 machine-$(CONFIG_ARCH_AT91)		+= at91

arch/arm/dts/an7581-u-boot.dtsi

@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/ {
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		atf-reserved-memory@80000000 {
+			no-map;
+			reg = <0x0 0x80000000 0x0 0x40000>;
+		};
+	};
+};
+
+&uart1 {
+	bootph-all;
+};

arch/arm/dts/en7581-evb-u-boot.dtsi

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/ {
+	/* When running as a first-stage bootloader this isn't filled in automatically */
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0x0 0x20000000>;
+	};
+};
+
+#include "an7581-u-boot.dtsi"

arch/arm/mach-airoha/Kconfig

@@ -0,0 +1,32 @@
+if ARCH_AIROHA
+
+config SYS_VENDOR
+	default "airoha"
+
+choice
+	prompt "Airoha board select"
+
+config TARGET_AN7581
+	bool "Airoha AN7581 SoC"
+	select ARM64
+	help
+	  The Airoha EN7581 is a ARM-based SoC with a quad-core Cortex-A7
+	  including NEON and GPU, Mali-450 graphics, several DDR3 options,
+	  crypto engine, built-in Wi-Fi / Bluetooth combo chip, JPEG decoder,
+	  video interfaces supporting HDMI and MIPI, and video codec support.
+	  Peripherals include Gigabit Ethernet, switch, USB3.0 and OTG, PCIe,
+	  I2S, PCM, S/PDIF, UART, SPI, I2C, IR TX/RX, and PWM.
+
+endchoice
+
+config SYS_SOC
+	default "an7581" if TARGET_AN7581
+
+config SYS_BOARD
+	default "an7581" if TARGET_AN7581
+
+config SYS_CONFIG_NAME
+	default "an7581" if TARGET_AN7581
+
+endif
+

arch/arm/mach-airoha/Makefile

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier:	GPL-2.0
+
+obj-y	+= cpu.o
+
+obj-$(CONFIG_TARGET_AN7581) += an7581/

arch/arm/mach-airoha/an7581/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier:	GPL-2.0
+
+obj-y += init.o

arch/arm/mach-airoha/an7581/init.c

@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <fdtdec.h>
+#include <init.h>
+#include <asm/armv8/mmu.h>
+#include <asm/system.h>
+
+int print_cpuinfo(void)
+{
+	printf("CPU:   Airoha AN7581\n");
+	return 0;
+}
+
+int dram_init(void)
+{
+	return fdtdec_setup_mem_size_base();
+}
+
+int dram_init_banksize(void)
+{
+	return fdtdec_setup_memory_banksize();
+}
+
+void reset_cpu(ulong addr)
+{
+	psci_system_reset();
+}
+
+static struct mm_region an7581_mem_map[] = {
+	{
+		/* DDR */
+		.virt = 0x80000000UL,
+		.phys = 0x80000000UL,
+		.size = 0x80000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | PTE_BLOCK_OUTER_SHARE,
+	}, {
+		.virt = 0x00000000UL,
+		.phys = 0x00000000UL,
+		.size = 0x20000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE |
+			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
+	}, {
+		0,
+	}
+};
+struct mm_region *mem_map = an7581_mem_map;

arch/arm/mach-airoha/cpu.c

@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <cpu_func.h>
+#include <dm.h>
+#include <init.h>
+#include <wdt.h>
+#include <dm/uclass-internal.h>
+
+int arch_cpu_init(void)
+{
+	icache_enable();
+
+	return 0;
+}
+
+void enable_caches(void)
+{
+	/* Enable D-cache. I-cache is already enabled in start.S */
+	dcache_enable();
+}

board/airoha/an7581/MAINTAINERS

@@ -0,0 +1,5 @@
+AN7581
+M:	Christian Marangi <ansuelsmth@gmail.com>
+S:	Maintained
+N:      airoha
+N:      an7581

board/airoha/an7581/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier:	GPL-2.0
+
+obj-y	+= an7581_rfb.o

board/airoha/an7581/an7581_rfb.c

@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Author: Christian Marangi <ansuelsmth@gmail.com>
+ */
+
+#include <asm/global_data.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_init(void)
+{
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = CFG_SYS_SDRAM_BASE + 0x100;
+
+	return 0;
+}

configs/an7581_evb_defconfig

@@ -0,0 +1,78 @@
+CONFIG_ARM=y
+CONFIG_ARCH_AIROHA=y
+CONFIG_TEXT_BASE=0x81E00000
+CONFIG_SYS_MALLOC_F_LEN=0x4000
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_ENV_SIZE=0x4000
+CONFIG_ENV_OFFSET=0x7c000
+CONFIG_DM_GPIO=y
+CONFIG_DEFAULT_DEVICE_TREE="airoha/en7581-evb"
+CONFIG_DM_RESET=y
+CONFIG_SYS_LOAD_ADDR=0x81800000
+CONFIG_BUILD_TARGET="u-boot.bin"
+# CONFIG_EFI_LOADER is not set
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_BOOTDELAY=3
+CONFIG_DEFAULT_FDT_FILE="en7581-evb"
+CONFIG_SYS_PBSIZE=1049
+CONFIG_SYS_CONSOLE_IS_IN_ENV=y
+# CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_PROMPT="U-Boot> "
+CONFIG_SYS_MAXARGS=8
+CONFIG_CMD_BOOTZ=y
+CONFIG_CMD_BOOTMENU=y
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_XIMG is not set
+CONFIG_CMD_BIND=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_MTD=y
+CONFIG_CMD_SF_TEST=y
+CONFIG_CMD_SPI=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_PING=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
+CONFIG_CMD_MTDPARTS=y
+CONFIG_CMD_LOG=y
+CONFIG_OF_UPSTREAM=y
+CONFIG_ENV_OVERWRITE=y
+CONFIG_ENV_IS_IN_MMC=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_REGMAP=y
+CONFIG_SYSCON=y
+CONFIG_CLK=y
+CONFIG_DMA=y
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
+CONFIG_MMC_HS200_SUPPORT=y
+CONFIG_MTD=y
+CONFIG_DM_MTD=y
+CONFIG_MTD_SPI_NAND=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH_EON=y
+CONFIG_SPI_FLASH_GIGADEVICE=y
+CONFIG_SPI_FLASH_ISSI=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SPI_FLASH_MTD=y
+CONFIG_PHYLIB=y
+CONFIG_PHY=y
+CONFIG_PINCTRL=y
+CONFIG_PINCONF=y
+CONFIG_POWER_DOMAIN=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_RAM=y
+CONFIG_DM_SERIAL=y
+CONFIG_SYS_NS16550=y
+CONFIG_SPI=y
+CONFIG_DM_SPI=y
+CONFIG_SHA512=y

include/configs/an7581.h

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Configuration for Airoha AN7581
+ */
+
+#ifndef __AN7581_H
+#define __AN7581_H
+
+#include <linux/sizes.h>
+
+#define CFG_SYS_UBOOT_BASE		CONFIG_TEXT_BASE
+
+#define CFG_SYS_INIT_RAM_ADDR           CONFIG_TEXT_BASE
+#define CFG_SYS_INIT_RAM_SIZE           SZ_2M
+
+/* DRAM */
+#define CFG_SYS_SDRAM_BASE		0x80000000
+
+#endif