doc: boards: amlogic: update documentation for pre-generated-fip's
Improve documentation.
Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Link: https://lore.kernel.org/r/20230320114609.930145-4-christianshewitt@gmail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
diff --git a/doc/board/amlogic/pre-generated-fip.rst b/doc/board/amlogic/pre-generated-fip.rst
index c63ea61..6a43d77 100644
--- a/doc/board/amlogic/pre-generated-fip.rst
+++ b/doc/board/amlogic/pre-generated-fip.rst
@@ -1,24 +1,57 @@
.. SPDX-License-Identifier: GPL-2.0+
-Pre-Generated FIP file set
-==========================
+Pre-Generated FIP File Repo
+===========================
-The Amlogic ARMv8 based SoCs uses a vendor variant of the Trusted Firmware-A
-boot architecture.
+Pre-built Flattened Image Package (FIP) sources and Amlogic signing binaries for many
+commercially available boards and some Android STB devices are collected for use with
+distro build-systems here: https://github.com/LibreELEC/amlogic-boot-fip
-You can find documentation on the Trusted Firmware-A architecture on: https://www.trustedfirmware.org/projects/tf-a/
+Using the pre-built FIP sources to sign U-Boot is simple, e.g. for LePotato:
-The Trusted Firmware-A uses the following boot elements (simplified):
+.. code-block:: bash
+
+ $ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
+ $ cd amlogic-boot-fip
+ $ mkdir my-output-dir
+ $ ./build-fip.sh lepotato /path/to/u-boot/u-boot.bin my-output-dir
+
+Then write U-Boot to SD or eMMC with:
+
+.. code-block:: bash
+
+ $ DEV=/dev/boot_device
+ $ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
+ $ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=440
+
+Files Included
+--------------
+
+Amlogic ARMv8 SoCs use a vendor modified variant of the ARM Trusted Firmware-A boot
+architecture. See documentation here: https://www.trustedfirmware.org/projects/tf-a/
+
+Trusted Firmware-A uses the following boot elements (simplified):
-- BL1: First boot step, implemented in ROM on Amlogic SoCs
-- BL2: Second boot step, used to initialize the SoC main clocks & DDR interface. The BL21 and ACS board-specific binaries are "inserted" in the BL32 binary before signing/packaging in order to be flashed on the platform.
-- BL30: Amlogic Secure Co-Processor (SCP) firmware used to handle all the system management operations (DVFS, suspend/resume, ...)
-- BL301: Amlogic Secure Co-Processor (SCP) board-specific firmware "plug-in" to handle custom DVFS & suspend-resume parameters
+- BL1: First boot step implemented in ROM on Amlogic SoCs
+
+- BL2: Second boot step used to initialize the SoC main clocks & DDR interface. BL21
+ and ACS board-specific binaries must be "inserted" into the BL2 binary before signing
+ and packaging in order to be flashed on the platform
+
+- BL30: Amlogic Secure Co-Processor (SCP) firmware used to handle all system management
+ operations (DVFS, suspend/resume, ..)
+
+- BL301: Amlogic Secure Co-Processor (SCP) board-specific firmware "plug-in" to handle
+ custom DVFS & suspend-resume parameters
+
- BL31: Initializes the interrupt controller and the system management interface (PSCI)
-- BL32 (Optional): Is the Trusted Environment Execution (TEE) Operating System to run secure Trusted Apps, e.g. OP-TEE
+
+- BL32 (Optional): Is the Trusted Environment Execution (TEE) Operating System used to
+ run secure Trusted Apps, e.g. OP-TEE
+
- BL33: Is the last non-secure step, usually U-Boot which loads Linux
-Amlogic provides in binary form:
+Amlogic sources provide the following binaries:
- bl2.bin
- bl30.bin
@@ -26,10 +59,50 @@
- bl31.img
- bl32.bin
+For G12A/B and SM1 Amlogic also provides DDR drivers used by the BL2 binary:
+
+- ddr4_1d.fw
+- ddr4_2d.fw
+- ddr3_1d.fw
+- piei.fw
+- lpddr4_1d.fw
+- lpddr4_2d.fw
+- diag_lpddr4.fw
+- aml_ddr.fw
+
+The following files are generated from the Amlogic U-Boot fork:
+
+- acs.bin: Contains the PLL & DDR parameters for the board
+- bl301.bin: Contains the DVFS & suspend-resume handling code for the board
+- bl33.bin: U-boot binary image
+
+The acs.bin and bl301.bin files use U-Boot GPL-2.0+ headers and U-Boot build system and
+are thus considered to be issued from GPL-2.0+ source code.
+
-And for lastest SoCs, Amlogic also provides the DDR drivers used by the BL2 binary.
+Amlogic alo provides pre-compiled x86_64 and Python2 binaries:
-The licence of these files wasn't clear until recently, the currently Amlogic distribution licence
-is the following:
+- aml_encrypt_gxb
+- aml_encrypt_gxl
+- aml_encrypt_g12a
+- aml_encrypt_g12b
+- acs_tool.pyc
+
+The repo replaces the pre-compiled acs_tool.pyc with a Python3 acs_tool.py that can be
+used with modern build hosts.
+
+The repo also provides the following files used with GXBB boards:
+
+- bl1.bin.hardkernel
+- aml_chksum
+
+The repo also supports the open-source 'gxlimg' signing tool that can be used to sign
+U-Boot binaries for GXL/GXM/G12A/G12B/SM1 boards: https://github.com/repk/gxlimg
+
+Licensing
+---------
+
+The licence of Amlogic provided binaries was not historically clear but has now been
+clarified. The current Amlogic distribution licence is below:
.. code-block:: C
@@ -56,38 +129,3 @@
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-The following files are generated from the Amlogic U-Boot fork:
-
-- acs.bin: contains the PLL & DDR parameters for the board
-- bl301.bin: contains the DVFS & suspend-resume handling code for the board
-- bl33.bin: U-boot binary image
-
-The acs.bin & bl301.bin uses the U-Boot GPL-2.0+ headers & build systems, thus those
-are considered issued from GPL-2.0+ source code.
-
-The tools used to sign & package those binary files are delivered in binary format
-for Intel x86-64 and Python 2.x only.
-
-A collection of pre-built with the corresponding Amlogic binaries for the common
-commercially available boards were collected in the https://github.com/LibreELEC/amlogic-boot-fip
-repository.
-
-Using this collection for a commercially available board is very easy.
-
-Here considering the Libre Computer AML-S905X-CC, which codename is `lepotato`:
-
-.. code-block:: bash
-
- $ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
- $ cd amlogic-boot-fip
- $ mkdir my-output-dir
- $ ./build-fip.sh lepotato /path/to/u-boot/u-boot.bin my-output-dir
-
-and then write the image to SD with:
-
-.. code-block:: bash
-
- $ DEV=/dev/your_sd_device
- $ dd if=my-output-dir/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
- $ dd if=my-output-dir/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=444