Replace the board specific docs with a generic board.rst file which documents the build/boot process for the sdm845 and qcs404 boards now that the only differences are the DTB in use.
At the same time, create a debugging page to document some useful snippets and tips for working with Qualcomm platforms.
Reviewed-by: Neil Armstrong neil.armstrong@linaro.org Signed-off-by: Caleb Connolly caleb.connolly@linaro.org --- doc/board/qualcomm/board.rst | 125 +++++++++++++++++++++++++++++ doc/board/qualcomm/debugging.rst | 61 ++++++++++++++ doc/board/qualcomm/index.rst | 4 +- doc/board/qualcomm/qcs404.rst | 79 ------------------ doc/board/qualcomm/sdm845.rst | 167 --------------------------------------- 5 files changed, 188 insertions(+), 248 deletions(-)
diff --git a/doc/board/qualcomm/board.rst b/doc/board/qualcomm/board.rst new file mode 100644 index 000000000000..4d793209f9e3 --- /dev/null +++ b/doc/board/qualcomm/board.rst @@ -0,0 +1,125 @@ +.. SPDX-License-Identifier: GPL-2.0+ +.. sectionauthor:: Dzmitry Sankouski dsankouski@gmail.com + +Qualcomm generic boards +======================= + +About this +---------- +This document describes how to build and run U-Boot for Qualcomm generic +boards. Right now the generic target supports the Snapdragon 845 SoC, however +it's expected to support more SoCs going forward. + +SDM845 - high-end qualcomm chip, introduced in late 2017. +Mostly used in flagship phones and tablets of 2018. + +The current boot flow support loading u-boot as an Android boot image via +Qualcomm's UEFI-based ABL (Android) Bootloader. The DTB used by U-Boot will +be appended to the U-Boot image the same way as when booting Linux. U-Boot +will then retrieve the DTB during init. This way the memory layout and KASLR +offset will be populated by ABL. + +Installation +------------ +Build +^^^^^ + + $ ./tools/buildman/buildman -o .output qcom + +This will build ``.output/u-boot-nodtb.bin`` using the ``qcom_defconfig``. + +Generate FIT image (optional) +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +See doc/uImage.FIT for more details + +Pack android boot image +^^^^^^^^^^^^^^^^^^^^^^^ +We'll assemble android boot image with ``u-boot-nodtb.bin`` instead of linux kernel, +and FIT image instead of ``initramfs``. Android bootloader expect gzipped kernel +with appended dtb, so let's mimic linux to satisfy stock bootloader. + +Boards +------ + +starqlte +^^^^^^^^ + +The starqltechn is a production board for Samsung S9 (SM-G9600) phone, +based on the Qualcomm SDM845 SoC. + +This device is supported by the common qcom_defconfig. + +The DTB is called "sdm845-samsung-starqltechn.dtb" + +More information can be found on the `Samsung S9 page`_. + +dragonboard845c +^^^^^^^^^^^^^^^ + +The dragonboard845c is a Qualcomm Robotics RB3 Development Platform, based on +the Qualcomm SDM845 SoC. + +This device is supported by the common qcom_defconfig + +The DTB is called "sdm845-db845c.dtb" + +More information can be found on the `DragonBoard 845c page`_. + +qcs404-evb +^^^^^^^^^^ + +The QCS404 EvB is a Qualcomm Development Platform, based on the Qualcomm QCS404 SoC. + +This device is supported by the common qcom_defconfig + +The DTB is called "qcs404-evb-4000.dtb" + +Building steps +-------------- + +Steps: + +- Build u-boot + +As above:: + + ./tools/buildman/buildman -o .output qcom + +Or for db410c (and other boards not supported by the generic target):: + + make CROSS_COMPILE=aarch64-linux-gnu- O=.output dragonboard410c_defconfig + make O=.output -j$(nproc) + +- gzip u-boot:: + + gzip u-boot-nodtb.bin + +- Append dtb to gzipped u-boot:: + + cat u-boot-nodtb.bin.gz arch/arm/dts/your-board.dtb > u-boot-nodtb.bin.gz-dtb + +- If you chose to build a FIT image, A ``qcom.its`` file can be found in ``board/qualcomm/generic/`` + directory. It expects a folder as ``qcom_imgs/`` in the main directory containing pre-built kernel, + dts and ramdisk images. See ``qcom.its`` for full path to images:: + + mkimage -f qcom.its qcom.itb + +- Now we've got everything to build android boot image:: + + mkbootimg --kernel u-boot-nodtb.bin.gz-dtb --ramdisk db845c.itb \ + --output boot.img --pagesize 4096 --base 0x80000000 + +Or with no FIT image:: + + mkbootimg --kernel u-boot-nodtb.bin.gz-dtb \ + --output boot.img --pagesize 4096 --base 0x80000000 + +- Flash boot.img using fastboot and erase dtbo to avoid conflicts with our DTB: + + .. code-block:: bash + + fastboot flash boot boot.img + fastboot erase dtbo + +.. _Samsung S9 page: https://en.wikipedia.org/wiki/Samsung_Galaxy_S9 +.. _DragonBoard 845c page: https://www.96boards.org/product/rb3-platform/ diff --git a/doc/board/qualcomm/debugging.rst b/doc/board/qualcomm/debugging.rst new file mode 100644 index 000000000000..1c35d1909d12 --- /dev/null +++ b/doc/board/qualcomm/debugging.rst @@ -0,0 +1,61 @@ +.. SPDX-License-Identifier: GPL-2.0+ +.. sectionauthor:: Caleb Connolly caleb.connolly@linaro.org + +Qualcomm debugging +================== + +About this +---------- + +This page describes how to enable early UART and other debugging techniques +for Qualcomm boards. + +Enable debug UART +----------------- + +Newer boards (SDM845 and newer, those with GENI SE UART) +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Open ``configs/qcom_defconfig`` and add the following snippet to the bottom: + + CONFIG_BAUDRATE=115200 + + # Uncomment to enable UART pre-relocation + CONFIG_DEBUG_UART=y + CONFIG_DEBUG_UART_ANNOUNCE=y + # This is the address of the debug-uart peripheral + # The value here is for SDM845, other platforms will vary + CONFIG_DEBUG_UART_BASE=0xa84000 + # Boards older than ~2018 pre-date the GENI driver and unfortunately + # aren't supported here + CONFIG_DEBUG_UART_MSM_GENI=y + # For sdm845 this is the UART clock rate + CONFIG_DEBUG_UART_CLOCK=7372800 + # Most newer boards have an oversampling value of 16 instead + # of 32, they need the clock rate to be doubled + #CONFIG_DEBUG_UART_CLOCK=14745600 + +Then build as normal (don't forget to ``make qcom_defconfig``` again). + +Older boards (db410c and db820c) +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Open ``configs/dragonboard<BOARD>_defconfig`` + + CONFIG_BAUDRATE=115200 + CONFIG_DEBUG_UART=y + CONFIG_DEBUG_UART_ANNOUNCE=y + # db410c - 0x78b0000 + # db820c - 0x75b0000 + CONFIG_DEBUG_UART_BASE=0x75b0000 + CONFIG_DEBUG_UART_MSM=y + CONFIG_DEBUG_UART_CLOCK=7372800 + #CONFIG_DEBUG_UART_SKIP_INIT=y + + CONFIG_LOG=y + CONFIG_HEXDUMP=y + CONFIG_CMD_LOG=y + CONFIG_LOG_MAX_LEVEL=9 + CONFIG_LOG_DEFAULT_LEVEL=9 + CONFIG_LOGLEVEL=9 + diff --git a/doc/board/qualcomm/index.rst b/doc/board/qualcomm/index.rst index 0f9c4299569a..4955274a39bc 100644 --- a/doc/board/qualcomm/index.rst +++ b/doc/board/qualcomm/index.rst @@ -7,5 +7,5 @@ Qualcomm :maxdepth: 2
dragonboard410c - sdm845 - qcs404 + board + debugging diff --git a/doc/board/qualcomm/qcs404.rst b/doc/board/qualcomm/qcs404.rst deleted file mode 100644 index 0cb71d97c987..000000000000 --- a/doc/board/qualcomm/qcs404.rst +++ /dev/null @@ -1,79 +0,0 @@ -.. SPDX-License-Identifier: GPL-2.0+ -.. sectionauthor:: Sumit Garg sumit.garg@linaro.org - -QCS404 EVB -========== - -About this ----------- -This document describes the information about Qualcomm QCS404 evaluation board -and it's usage steps. - -The current boot flow support loading u-boot as an Android boot image via -Qualcomm's UEFI-based ABL (Android) Bootloader. - -Installation ------------- -Build -^^^^^ -Setup ``CROSS_COMPILE`` for aarch64 and build U-Boot for your board:: - - $ export CROSS_COMPILE=<aarch64 toolchain prefix> - $ make qcs404evb_defconfig - $ make - -This will build ``u-boot.bin`` in the configured output directory. - -Generate FIT image -^^^^^^^^^^^^^^^^^^ -A ``qcs404.its`` file can be found in ``board/qualcomm/qcs404-evb/`` directory. -It expects a folder as ``qcs404_imgs/`` in the main directory containing -pre-built kernel, dts and ramdisk images. See ``qcs404.its`` for full path to -images. - -- Build FIT image:: - - mkimage -f qcs404-evb.its qcs404-evb.itb - -Pack android boot image -^^^^^^^^^^^^^^^^^^^^^^^ -We'll assemble android boot image with ``u-boot.bin`` instead of linux kernel, -and FIT image instead of ``initramfs``. Android bootloader expect gzipped kernel -with appended dtb, so let's mimic linux to satisfy stock bootloader: - -- create dump dtb:: - - workdir=/tmp/prepare_payload - mkdir -p "$workdir" - cd "$workdir" - mock_dtb="$workdir"/payload_mock.dtb - - dtc -I dts -O dtb -o "$mock_dtb" << EOF - /dts-v1/; - / { - model = "Qualcomm Technologies, Inc. QCS404 EVB 4000"; - compatible = "qcom,qcs404-evb-4000", "qcom,qcs404-evb", "qcom,qcs404"; - - #address-cells = <2>; - #size-cells = <2>; - - memory@80000000 { - device_type = "memory"; - /* We expect the bootloader to fill in the size */ - reg = <0 0x80000000 0 0>; - }; - - chosen { }; - }; - EOF - -- gzip u-boot ``gzip u-boot.bin`` -- append dtb to gzipped u-boot: ``cat u-boot.bin.gz "$mock_dtb" > u-boot.bin.gz-dtb`` - -Now we've got everything to build android boot image::: - - mkbootimg --kernel u-boot.bin.gz-dtb \ - --ramdisk qcs404-evb.itb --pagesize 4096 \ - --base 0x80000000 --output boot.img - -Flash image on qcs404-evb using fastboot method. diff --git a/doc/board/qualcomm/sdm845.rst b/doc/board/qualcomm/sdm845.rst deleted file mode 100644 index a65f00df39f5..000000000000 --- a/doc/board/qualcomm/sdm845.rst +++ /dev/null @@ -1,167 +0,0 @@ -.. SPDX-License-Identifier: GPL-2.0+ -.. sectionauthor:: Dzmitry Sankouski dsankouski@gmail.com - -Snapdragon 845 -============== - -About this ----------- - -This document describes the information about Qualcomm Snapdragon 845 -supported boards and it's usage steps. - -SDM845 - hi-end qualcomm chip, introduced in late 2017. -Mostly used in flagship phones and tablets of 2018. - -The current boot flow support loading u-boot as an Android boot image via -Qualcomm's UEFI-based ABL (Android) Bootloader. - -Installation ------------- - -Build -^^^^^ - -Setup ``CROSS_COMPILE`` for aarch64 and build U-Boot for your board:: - - $ export CROSS_COMPILE=<aarch64 toolchain prefix> - $ make <your board name here, see Boards section>_defconfig - $ make - -This will build ``u-boot.bin`` in the configured output directory. - -Generate FIT image -^^^^^^^^^^^^^^^^^^ - -See doc/uImage.FIT for more details - -Pack android boot image -^^^^^^^^^^^^^^^^^^^^^^^ - -We'll assemble android boot image with ``u-boot.bin`` instead of linux kernel, -and FIT image instead of ``initramfs``. Android bootloader expect gzipped kernel -with appended dtb, so let's mimic linux to satisfy stock bootloader. - -Boards ------- - -starqlte -^^^^^^^^ - -The starqltechn is a production board for Samsung S9 (SM-G9600) phone, -based on the Qualcomm SDM845 SoC. - -Steps: - -- Build u-boot:: - - $ export CROSS_COMPILE=<aarch64 toolchain prefix> - $ make starqltechn_defconfig - $ make - -- Create dump dtb:: - - workdir=/tmp/prepare_payload - mkdir -p "$workdir" - cd "$workdir" - mock_dtb="$workdir"/payload_mock.dtb - - dtc -I dts -O dtb -o "$mock_dtb" << EOF - /dts-v1/; - / { - memory { - /* We expect the bootloader to fill in the size */ - reg = <0 0 0 0>; - }; - - chosen { }; - }; - EOF - -- gzip u-boot:: - - gzip u-boot.bin - -- Append dtb to gzipped u-boot:: - - cat u-boot.bin.gz "$mock_dtb" > u-boot.bin.gz-dtb - -- Now we've got everything to build android boot image:: - - mkbootimg --base 0x0 --kernel_offset 0x00008000 \ - --ramdisk_offset 0x02000000 --tags_offset 0x01e00000 \ - --pagesize 4096 --second_offset 0x00f00000 \ - --ramdisk "$fit_image" \ - --kernel u-boot.bin.gz-dtb \ - -o boot.img - -- Flash image with your phone's flashing method. - -More information can be found on the `Samsung S9 page`_. - -dragonboard845c -^^^^^^^^^^^^^^^ - -The dragonboard845c is a Qualcomm Robotics RB3 Development Platform, based on -the Qualcomm SDM845 SoC. - -Steps: - -- Build u-boot:: - - $ export CROSS_COMPILE=<aarch64 toolchain prefix> - $ make dragonboard845c_defconfig - $ make - -- Create dummy dtb:: - - workdir=/tmp/prepare_payload - mkdir -p "$workdir" - mock_dtb="$workdir"/payload_mock.dtb - - dtc -I dts -O dtb -o "$mock_dtb" << EOF - /dts-v1/; - / { - #address-cells = <2>; - #size-cells = <2>; - - memory@80000000 { - device_type = "memory"; - /* We expect the bootloader to fill in the size */ - reg = <0 0x80000000 0 0>; - }; - - chosen { }; - }; - EOF - -- gzip u-boot:: - - gzip u-boot.bin - -- Append dtb to gzipped u-boot:: - - cat u-boot.bin.gz "$mock_dtb" > u-boot.bin.gz-dtb - -- A ``db845c.its`` file can be found in ``board/qualcomm/dragonboard845c/`` - directory. It expects a folder as ``db845c_imgs/`` in the main directory - containing pre-built kernel, dts and ramdisk images. See ``db845c.its`` - for full path to images:: - - mkimage -f db845c.its db845c.itb - -- Now we've got everything to build android boot image:: - - mkbootimg --kernel u-boot.bin.gz-dtb --ramdisk db845c.itb \ - --output boot.img --pagesize 4096 --base 0x80000000 - -- Flash boot.img using db845c fastboot method: - - .. code-block:: bash - - sudo fastboot flash boot boot.img - -More information can be found on the `DragonBoard 845c page`_. - -.. _Samsung S9 page: https://en.wikipedia.org/wiki/Samsung_Galaxy_S9 -.. _DragonBoard 845c page: https://www.96boards.org/product/rb3-platform/