| Sumit Garg | 89a8ec9 | 2022-07-12 12:42:12 +0530 | [diff] [blame] | 1 | .. SPDX-License-Identifier: GPL-2.0+ |
| 2 | .. sectionauthor:: Sumit Garg <sumit.garg@linaro.org> |
| 3 | |
| 4 | QCS404 EVB |
| 5 | ========== |
| 6 | |
| 7 | About this |
| 8 | ---------- |
| 9 | This document describes the information about Qualcomm QCS404 evaluation board |
| 10 | and it's usage steps. |
| 11 | |
| 12 | U-Boot can be used as a replacement for Qualcomm's original ABL (UEFI) bootloader. |
| 13 | It is loaded as an Android boot image through ABL |
| 14 | |
| 15 | Installation |
| 16 | ------------ |
| 17 | Build |
| 18 | ^^^^^ |
| 19 | Setup ``CROSS_COMPILE`` for aarch64 and build U-Boot for your board:: |
| 20 | |
| 21 | $ export CROSS_COMPILE=<aarch64 toolchain prefix> |
| 22 | $ make qcs404evb_defconfig |
| 23 | $ make |
| 24 | |
| 25 | This will build ``u-boot.bin`` in the configured output directory. |
| 26 | |
| 27 | Generate FIT image |
| 28 | ^^^^^^^^^^^^^^^^^^ |
| 29 | A ``qcs404.its`` file can be found in ``board/qualcomm/qcs404-evb/`` directory. |
| 30 | It expects a folder as ``qcs404_imgs/`` in the main directory containing |
| 31 | pre-built kernel, dts and ramdisk images. See ``qcs404.its`` for full path to |
| 32 | images. |
| 33 | |
| 34 | - Build FIT image:: |
| 35 | |
| 36 | mkimage -f qcs404-evb.its qcs404-evb.itb |
| 37 | |
| 38 | Pack android boot image |
| 39 | ^^^^^^^^^^^^^^^^^^^^^^^ |
| 40 | We'll assemble android boot image with ``u-boot.bin`` instead of linux kernel, |
| 41 | and FIT image instead of ``initramfs``. Android bootloader expect gzipped kernel |
| 42 | with appended dtb, so let's mimic linux to satisfy stock bootloader: |
| 43 | |
| 44 | - create dump dtb:: |
| 45 | |
| 46 | workdir=/tmp/prepare_payload |
| 47 | mkdir -p "$workdir" |
| 48 | cd "$workdir" |
| 49 | mock_dtb="$workdir"/payload_mock.dtb |
| 50 | |
| 51 | dtc -I dts -O dtb -o "$mock_dtb" << EOF |
| 52 | /dts-v1/; |
| 53 | / { |
| 54 | model = "Qualcomm Technologies, Inc. QCS404 EVB 4000"; |
| 55 | compatible = "qcom,qcs404-evb-4000", "qcom,qcs404-evb", "qcom,qcs404"; |
| 56 | |
| 57 | #address-cells = <2>; |
| 58 | #size-cells = <2>; |
| 59 | |
| 60 | memory@80000000 { |
| 61 | device_type = "memory"; |
| 62 | /* We expect the bootloader to fill in the size */ |
| 63 | reg = <0 0x80000000 0 0>; |
| 64 | }; |
| 65 | |
| 66 | chosen { }; |
| 67 | }; |
| 68 | EOF |
| 69 | |
| 70 | - gzip u-boot ``gzip u-boot.bin`` |
| 71 | - append dtb to gzipped u-boot: ``cat u-boot.bin.gz "$mock_dtb" > u-boot.bin.gz-dtb`` |
| 72 | |
| 73 | Now we've got everything to build android boot image::: |
| 74 | |
| 75 | mkbootimg --kernel u-boot.bin.gz-dtb \ |
| 76 | --ramdisk qcs404-evb.itb --pagesize 4096 \ |
| 77 | --base 0x80000000 --output boot.img |
| 78 | |
| 79 | Flash image on qcs404-evb using fastboot method. |