board: Add new Broadcom Northstar boardWIP/2023-03-29-assorted-platform-updates

This adds a simple Northstar "BRCMNS" board to be used with
the BCM4709x and BCM5301x chips.

The main intention is to use this with the D-Link DIR-890L
and DIR-885L routers for loading the kernel into RAM from
NAND memory using the BCH-1 ECC and using the separately
submitted SEAMA load command, so we are currently not adding
support for things such as networking.

If other board need other ECC for example, they need to
create a separate DTS file and augment the code, but I don't
know if any other users will turn up.

Cc: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

9 files changed, 230 insertions, 0 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 098f654..3f4c708 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -2287,6 +2287,7 @@ source "board/Marvell/octeontx2/Kconfig"
 source "board/armltd/vexpress/Kconfig"
 source "board/armltd/vexpress64/Kconfig"
 source "board/cortina/presidio-asic/Kconfig"
+source "board/broadcom/bcmns/Kconfig"
 source "board/broadcom/bcmns3/Kconfig"
 source "board/cavium/thunderx/Kconfig"
 source "board/eets/pdu001/Kconfig"
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index b25570d..528d247 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -1185,6 +1185,8 @@ dtb-$(CONFIG_ARCH_BCM283X) += \
 	bcm2837-rpi-cm3-io3.dtb \
 	bcm2711-rpi-4-b.dtb
 
+dtb-$(CONFIG_TARGET_BCMNS) += ns-board.dtb
+
 dtb-$(CONFIG_TARGET_BCMNS3) += ns3-board.dtb
 
 dtb-$(CONFIG_ARCH_BCMSTB) += bcm7xxx.dtb
diff --git a/arch/arm/dts/ns-board.dts b/arch/arm/dts/ns-board.dts
new file mode 100644
index 0000000..bc2a0dd
--- /dev/null
+++ b/arch/arm/dts/ns-board.dts
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier:      GPL-2.0+
+
+/dts-v1/;
+
+#include "bcm5301x.dtsi"
+
+/ {
+	/*
+	 * The Northstar does not have a proper fallback compatible, but
+	 * these basic chips will suffice.
+	 */
+	model = "Northstar model";
+	compatible = "brcm,bcm47094", "brcm,bcm4708";
+	#address-cells = <1>;
+	#size-cells = <1>;
+	interrupt-parent = <&gic>;
+
+	memory {
+		device_type = "memory";
+		reg = <0x00000000 0x08000000>,
+		      <0x88000000 0x08000000>;
+	};
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	nand-controller@18028000 {
+		nandcs: nand@0 {
+			compatible = "brcm,nandcs";
+			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			/*
+			 * Same as using the bcm5301x-nand-cs0-bch1.dtsi
+			 * include from the Linux kernel.
+			 */
+			nand-ecc-algo = "bch";
+			nand-ecc-strength = <1>;
+			nand-ecc-step-size = <512>;
+
+			partitions {
+				compatible = "brcm,bcm947xx-cfe-partitions";
+			};
+		};
+	};
+};
+
+&uart0 {
+	clock-frequency = <125000000>;
+	status = "okay";
+};
diff --git a/board/broadcom/bcmns/Kconfig b/board/broadcom/bcmns/Kconfig
new file mode 100644
index 0000000..82f4709
--- /dev/null
+++ b/board/broadcom/bcmns/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_BCMNS
+
+config SYS_BOARD
+	default "bcmns"
+
+config SYS_VENDOR
+	default "broadcom"
+
+config SYS_CONFIG_NAME
+	default "bcmns"
+
+endif
diff --git a/board/broadcom/bcmns/MAINTAINERS b/board/broadcom/bcmns/MAINTAINERS
new file mode 100644
index 0000000..fd37c33
--- /dev/null
+++ b/board/broadcom/bcmns/MAINTAINERS
@@ -0,0 +1,6 @@
+BCMNS BOARD
+M:	Linus Walleij <linus.walleij@linaro.org>
+S:	Maintained
+F:	board/broadcom/bcmnsp/
+F:	configs/bcmnsp_defconfig
+F:	include/configs/bcmnsp.h
diff --git a/board/broadcom/bcmns/Makefile b/board/broadcom/bcmns/Makefile
new file mode 100644
index 0000000..8a6a854
--- /dev/null
+++ b/board/broadcom/bcmns/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+obj-y	:= ns.o
diff --git a/board/broadcom/bcmns/ns.c b/board/broadcom/bcmns/ns.c
new file mode 100644
index 0000000..1249e45
--- /dev/null
+++ b/board/broadcom/bcmns/ns.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Broadcom Northstar generic board set-up code
+ * Copyright (C) 2023 Linus Walleij <linus.walleij@linaro.org>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <init.h>
+#include <log.h>
+#include <ram.h>
+#include <serial.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+#include <asm/armv7m.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+	return fdtdec_setup_mem_size_base();
+}
+
+int dram_init_banksize(void)
+{
+	return fdtdec_setup_memory_banksize();
+}
+
+int board_late_init(void)
+{
+	/* LEDs etc can be initialized here */
+	return 0;
+}
+
+int board_init(void)
+{
+	return 0;
+}
+
+void reset_cpu(void)
+{
+}
+
+int print_cpuinfo(void)
+{
+	printf("BCMNS Northstar SoC\n");
+	return 0;
+}
+
+int misc_init_r(void)
+{
+	return 0;
+}
+
+int ft_board_setup(void *fdt, struct bd_info *bd)
+{
+	printf("Northstar board setup: DTB at 0x%08lx\n", (ulong)fdt);
+	return 0;
+}
+
diff --git a/configs/bcmns_defconfig b/configs/bcmns_defconfig
new file mode 100644
index 0000000..02e2fbe
--- /dev/null
+++ b/configs/bcmns_defconfig
@@ -0,0 +1,41 @@
+CONFIG_ARM=y
+CONFIG_TARGET_BCMNS=y
+CONFIG_TEXT_BASE=0x00008000
+CONFIG_SYS_MALLOC_LEN=0x2000000
+CONFIG_SYS_MALLOC_F_LEN=0x8000
+CONFIG_NR_DRAM_BANKS=2
+CONFIG_DEFAULT_DEVICE_TREE="ns-board"
+CONFIG_IDENT_STRING="Broadcom Northstar"
+CONFIG_SYS_LOAD_ADDR=0x00008000
+CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x00100000
+# CONFIG_BOOTSTD is not set
+CONFIG_AUTOBOOT_KEYED=y
+CONFIG_AUTOBOOT_PROMPT="Boot Northstar system in %d seconds\n"
+CONFIG_BOOTDELAY=1
+CONFIG_USE_BOOTCOMMAND=y
+CONFIG_BOOTCOMMAND="run bootcmd_dlink_dir8xxl"
+CONFIG_SYS_PROMPT="northstar> "
+CONFIG_ENV_VARS_UBOOT_CONFIG=y
+CONFIG_OF_BOARD_SETUP=y
+CONFIG_OF_STDOUT_VIA_ALIAS=y
+CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_MAXARGS=64
+CONFIG_CMD_SEAMA=y
+CONFIG_CMD_BOOTZ=y
+CONFIG_CMD_CACHE=y
+CONFIG_OF_EMBED=y
+CONFIG_USE_HOSTNAME=y
+CONFIG_HOSTNAME="NS"
+CONFIG_CLK=y
+CONFIG_MTD=y
+CONFIG_DM_MTD=y
+CONFIG_MTD_RAW_NAND=y
+CONFIG_NAND_BRCMNAND=y
+CONFIG_SYS_NAND_ONFI_DETECTION=y
+CONFIG_CMD_NAND=y
+CONFIG_DM_SERIAL=y
+CONFIG_SYS_NS16550=y
+# CONFIG_NET is not set
+# CONFIG_EFI_LOADER is not set
diff --git a/include/configs/bcmns.h b/include/configs/bcmns.h
new file mode 100644
index 0000000..6f5f2b7
--- /dev/null
+++ b/include/configs/bcmns.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef __BCM_NS_H
+#define __BCM_NS_H
+
+#include <linux/sizes.h>
+
+/* Physical Memory Map */
+#define V2M_BASE			0x00000000
+#define PHYS_SDRAM_1			V2M_BASE
+
+#define CFG_SYS_SDRAM_BASE		PHYS_SDRAM_1
+
+/* Called "periph_clk" in Linux, used by the global timer */
+#define CFG_SYS_HZ_CLOCK		500000000
+
+/* Called "iprocslow" in Linux */
+#define CFG_SYS_NS16550_CLK		125000000
+
+/* console configuration */
+#define CONSOLE_ARGS "console_args=console=ttyS0,115200n8\0"
+#define MAX_CPUS "max_cpus=maxcpus=2\0"
+#define EXTRA_ARGS "extra_args=earlycon=uart8250,mmio32,0x18000300\0"
+
+#define BASE_ARGS "${console_args} ${extra_args} ${pcie_args}"	\
+		  " ${max_cpus}  ${log_level} ${reserved_mem}"
+#define SETBOOTARGS "setbootargs=setenv bootargs " BASE_ARGS "\0"
+
+#define KERNEL_LOADADDR_CFG \
+	"loadaddr=0x01000000\0" \
+	"dtb_loadaddr=0x02000000\0"
+
+/*
+ * Hardcoded for the only boards we support, if you add more
+ * boards, add a more clever bootcmd!
+ */
+#define NS_BOOTCMD "bootcmd_dlink_dir8xxl=seama 0x00fe0000; go 0x01000000"
+
+#define ARCH_ENV_SETTINGS \
+	CONSOLE_ARGS \
+	MAX_CPUS \
+	EXTRA_ARGS \
+	KERNEL_LOADADDR_CFG \
+	NS_BOOTCMD
+
+#define CFG_EXTRA_ENV_SETTINGS \
+	ARCH_ENV_SETTINGS
+
+#endif /* __BCM_NS_H */