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openwrt/package/boot/uboot-bcm53xx/patches/0005-board-Add-new-Broadcom-Northstar-board.patch
Linus Walleij f2a8763587 uboot-bcm53xx: Add U-Boot for NorthStar BCM53xx 
I recently added support for the NorthStar ARM BCM53xx SoCs
to the upstream U-Boot. This is a back port on top of the
2023.04 version already imported to OpenWrt with the 5 necessary
upstream patches.

This is needed to create a small U-Boot for the BCM53xx-based
D-Link DIR-890L and I think also the DIR-885L, so that a
recent (bigger) kernel can be loaded and executed from the
SEAMA partitions on these devices.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2023-08-20 18:08:13 +02:00

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From 652a6fa45b6c9d52dd9685fc12ad662e54a9092e Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Mon, 24 Apr 2023 09:38:30 +0200
Subject: [PATCH 5/5] board: Add new Broadcom Northstar board
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This adds a simple Northstar "BRCMNS" board to be used with
the BCM4708x 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.
The DTS file is a multiplatform NorthStar board, designed to
be usable with several NorthStar designs by avoiding any
particulars not related to the operation of U-Boot.
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>
---
arch/arm/Kconfig | 1 +
arch/arm/dts/Makefile | 2 ++
arch/arm/dts/ns-board.dts | 57 ++++++++++++++++++++++++++++++
board/broadcom/bcmns/Kconfig | 12 +++++++
board/broadcom/bcmns/MAINTAINERS | 6 ++++
board/broadcom/bcmns/Makefile | 2 ++
board/broadcom/bcmns/ns.c | 60 ++++++++++++++++++++++++++++++++
configs/bcmns_defconfig | 41 ++++++++++++++++++++++
doc/board/broadcom/index.rst | 1 +
doc/board/broadcom/northstar.rst | 44 +++++++++++++++++++++++
include/configs/bcmns.h | 49 ++++++++++++++++++++++++++
11 files changed, 275 insertions(+)
create mode 100644 arch/arm/dts/ns-board.dts
create mode 100644 board/broadcom/bcmns/Kconfig
create mode 100644 board/broadcom/bcmns/MAINTAINERS
create mode 100644 board/broadcom/bcmns/Makefile
create mode 100644 board/broadcom/bcmns/ns.c
create mode 100644 configs/bcmns_defconfig
create mode 100644 doc/board/broadcom/northstar.rst
create mode 100644 include/configs/bcmns.h
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -2286,6 +2286,7 @@ 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"
--- 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
--- /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";
+};
--- /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
--- /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
--- /dev/null
+++ b/board/broadcom/bcmns/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+obj-y := ns.o
--- /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;
+}
+
--- /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
--- a/doc/board/broadcom/index.rst
+++ b/doc/board/broadcom/index.rst
@@ -9,3 +9,4 @@ Broadcom
bcm7xxx
raspberrypi
+ northstar
--- /dev/null
+++ b/doc/board/broadcom/northstar.rst
@@ -0,0 +1,44 @@
+.. SPDX-License-Identifier: GPL-2.0+
+.. Copyright (C) 2023 Linus Walleij <linus.walleij@linaro.org>
+
+Broadcom Northstar Boards
+=========================
+
+This document describes how to use U-Boot on the Broadcom Northstar
+boards, comprised of the Cortex A9 ARM-based BCM470x and BCM5301x SoCs. These
+were introduced in 2012-2013 and some of them are also called StrataGX.
+
+Northstar is part of the iProc SoC family.
+
+A good overview of these boards can be found in Jon Mason's presentation
+"Enabling New Hardware in U-Boot" where the difference between Northstar
+and Northstar Plus and Northstar 2 (Aarch64) is addressed.
+
+The ROM in the Northstar SoC will typically look into NOR flash memory
+for a boot loader, and the way this works is undocumented. It should be
+possible to execute U-Boot as the first binary from the NOR flash but
+this usage path is unexplored. Please add information if you know more.
+
+D-Link Boards
+-------------
+
+When we use U-Boot with D-Link routers, the NOR flash has a boot loader
+and web server that can re-flash the bigger NAND flash memory for object
+code in the SEAMA format, so on these platforms U-Boot is converted into
+a SEAMA binary and installed in the SoC using the flash tool resident in
+the NOR flash. Details can be found in the OpenWrt project codebase.
+
+Configure
+---------
+
+.. code-block:: console
+
+ $ make CROSS_COMPILE=${CROSS_COMPILE} bcmns_defconfig
+
+Build
+-----
+
+.. code-block:: console
+
+ $ make CROSS_COMPILE=${CROSS_COMPILE}
+ $ ${CROSS_COMPILE}strip u-boot
--- /dev/null
+++ b/include/configs/bcmns.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef __BCM_NS_H
+#define __BCM_NS_H
+
+#include <linux/sizes.h>
+
+/* Physical Memory Map */
+#define V2M_BASE 0x00000000
+#define PHYS_SDRAM_1 V2M_BASE
+
+#define CFG_SYS_SDRAM_BASE PHYS_SDRAM_1
+
+/* Called "periph_clk" in Linux, used by the global timer */
+#define CFG_SYS_HZ_CLOCK 500000000
+
+/* Called "iprocslow" in Linux */
+#define CFG_SYS_NS16550_CLK 125000000
+
+/* console configuration */
+#define CONSOLE_ARGS "console_args=console=ttyS0,115200n8\0"
+#define MAX_CPUS "max_cpus=maxcpus=2\0"
+#define EXTRA_ARGS "extra_args=earlycon=uart8250,mmio32,0x18000300\0"
+
+#define BASE_ARGS "${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 */
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