[PATCH 2/2 v3] board: starfive: support Pine64 Star64 board

[H Bell]

Add documentation files

Signed-off-by: Henry Bell <dmoo_dv at protonmail.com>
Cc: ycliang at andestech.com
Cc: heinrich.schuchardt at canonical.com
---

Changes since v1

- New patch

Changes since v2

- Remove extra params to
- Clarification on boot section
- Add entry on MAC adresses and how to correct them
---
 doc/board/starfive/index.rst         |   1 +
 doc/board/starfive/pine64_star64.rst | 136 +++++++++++++++++++++++++++
 2 files changed, 137 insertions(+)
 create mode 100644 doc/board/starfive/pine64_star64.rst

diff --git a/doc/board/starfive/index.rst b/doc/board/starfive/index.rst
index 2762bf74c1..f05f8a0765 100644
--- a/doc/board/starfive/index.rst
+++ b/doc/board/starfive/index.rst
@@ -7,4 +7,5 @@ StarFive
    :maxdepth: 1
 
    milk-v_mars.rst
+   pine64_star64
    visionfive2
diff --git a/doc/board/starfive/pine64_star64.rst b/doc/board/starfive/pine64_star64.rst
new file mode 100644
index 0000000000..567d1207ba
--- /dev/null
+++ b/doc/board/starfive/pine64_star64.rst
@@ -0,0 +1,136 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+Pine64 Star64
+===========
+
+U-Boot for the Star64 uses the same U-Boot binaries as the VisionFive 2 board.
+In U-Boot SPL the actual board is detected and the device-tree patched
+accordingly.
+
+Building
+~~~~~~~~
+
+1. Add the RISC-V toolchain to your PATH.
+2. Setup ARCH & cross compilation environment variable:
+
+.. code-block:: none
+
+   export CROSS_COMPILE=<riscv64 toolchain prefix>
+
+The M-mode software OpenSBI provides the supervisor binary interface (SBI) and
+is responsible for the switch to S-Mode. It is a prerequisite to build U-Boot.
+Support for the JH7110 was introduced in OpenSBI 1.2. It is recommended to use
+a current release.
+
+.. code-block:: console
+
+	git clone https://github.com/riscv/opensbi.git
+	cd opensbi
+	make PLATFORM=generic FW_TEXT_START=0x40000000
+
+Now build the U-Boot SPL and U-Boot proper.
+
+.. code-block:: console
+
+	cd <U-Boot-dir>
+	make starfive_visionfive2_defconfig
+	make OPENSBI=$(opensbi_dir)/build/platform/generic/firmware/fw_dynamic.bin
+
+This will generate the U-Boot SPL image (spl/u-boot-spl.bin.normal.out) as well
+as the FIT image (u-boot.itb) with OpenSBI and U-Boot.
+
+Device-tree selection
+~~~~~~~~~~~~~~~~~~~~~
+
+U-Boot will set variable $fdtfile to starfive/jh7110-pine64-star64.dtb.
+
+To overrule this selection the variable can be set manually and saved in the
+environment
+
+::
+
+    setenv fdtfile my_device-tree.dtb
+    env save
+
+or the configuration variable CONFIG_DEFAULT_FDT_FILE can be used to set to
+provide a default value.
+
+Boot source selection
+~~~~~~~~~~~~~~~~~~~~~
+
+The board provides the DIP switches (marked S1804) adjacent to the 40pin GPIO
+Bus for boot selection. The ``L`` (0) and ``H`` (1) silk screening to the side
+of the should be used to determine state (not the ``ON/ONKE`` markings
+physically on the component). ``GPIO_0`` is channel 2 on the switch, while
+``GPIO_1`` is channel 1.
+
++ (QSPI) Flash: 00 ``??``
++ SD: 01 ``??``
++ EMMC: 10 ``??``
++ UART: 11 ``??``
+
+Preparing the SD-Card
+~~~~~~~~~~~~~~~~~~~~~
+
+The device firmware loads U-Boot SPL (u-boot-spl.bin.normal.out) from the
+partition with type GUID 2E54B353-1271-4842-806F-E436D6AF6985. You are free
+to choose any partition number.
+
+With the default configuration U-Boot SPL loads the U-Boot FIT image
+(u-boot.itb) from partition 2 (CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION=0x2).
+When formatting it is recommended to use GUID
+BC13C2FF-59E6-4262-A352-B275FD6F7172 for this partition.
+
+The FIT image (u-boot.itb) is a combination of OpenSBI's fw_dynamic.bin,
+u-boot-nodtb.bin and the device tree blob.
+
+Format the SD card (make sure the disk has GPT, otherwise use gdisk to switch)
+
+.. code-block:: bash
+
+	sudo sgdisk --clear \
+	  --set-alignment=2 \
+	  --new=1:4096:8191 --change-name=1:spl --typecode=1:2E54B353-1271-4842-806F-E436D6AF6985\
+	  --new=2:8192:16383 --change-name=2:uboot --typecode=2:BC13C2FF-59E6-4262-A352-B275FD6F7172  \
+	  --new=3:16384:1654784 --change-name=3:system --typecode=3:EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 \
+	  /dev/sdb
+
+Copy U-Boot to the SD card
+
+.. code-block:: bash
+
+	sudo dd if=u-boot-spl.bin.normal.out of=/dev/sdb1
+	sudo dd if=u-boot.itb of=/dev/sdb2
+
+	sudo mount /dev/sdb3 /mnt/
+	sudo cp u-boot-spl.bin.normal.out /mnt/
+	sudo cp u-boot.itb /mnt/
+	sudo cp Image.gz /mnt/
+	sudo cp initramfs.cpio.gz /mnt/
+	sudo cp jh7110-starfive-visionfive-2.dtb /mnt/
+	sudo umount /mnt
+
+Booting
+~~~~~~~
+
+Once you plugin the sdcard and power up, you should see the U-Boot prompt.
+
+MAC address issues
+~~~~~~~~~~~~~~~~~~
+
+The Star64 does not currently ship with unique serial numbers per-device.
+Devices tested (all 4GiB RAM) have the same serial number of
+``STAR64V1-2310-D004E000-00000005`` and the mac addresses of
+``6c:cf:39:00:75:61`` (lower) and ``6c:cf:39:00:75:62`` (upper) port will be
+assigned. Shipped models also have the EEPROM set as write protected, so it
+cannot be changed using ``mac`` commands.
+
+The MAC addresses may be "set" as follows by writing as a custom config to SPI
+(Change the last 3 bytes of MAC addreses as appropriate):
+
+::
+
+	env set ethaddr 6c:cf:39:00:75:63
+	env set eth1addr 6c:cf:39:00:75:64
+	env save
+	reset
-- 
2.44.0