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[dujemihanovic.xyz.git] / content / projects / pxa1908 / index.md

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+---
+title: "Mainline Linux on Marvell PXA1908"
+date: 2023-09-10T22:23:48+02:00
+---
+The Marvell PXA1908 was Marvell's first ARM64 SoC released sometime around 2014
+or 2015. The SoC is used in some of Samsung's entry level 2015 phones such as
+the [Core Prime VE
+LTE](https://wiki.postmarketos.org/wiki/Samsung_Galaxy_Core_Prime_VE_LTE_(samsung-coreprimevelte))
+and the [Xcover 3
+LTE](https://wiki.postmarketos.org/wiki/Samsung_Galaxy_Xcover_3_(samsung-xcover3lte)).
+The PXA1908 currently has out-of-tree support for booting mainline Linux.
+
+## Links
+
+* [Latest version of patchset (v5)](https://lore.kernel.org/all/20230812-pxa1908-lkml-v5-0-a5d51937ee34@skole.hr/)
+* [Main Git
+  repository](https://gitlab.com/LegoLivesMatter/linux/-/tree/pxa1908-lkml)
+* [postmarketOS SoC page](https://wiki.postmarketos.org/wiki/Marvell_PXA1908)
+
+## Building outside pmbootstrap
+
+1. Clone and compile [pxa-mkbootimg](https://github.com/osm0sis/pxa-mkbootimg)
+1. Clone repository
+1. Checkout `pxa1908-lkml`
+1. Get [kernel
+   config](https://gitlab.com/postmarketOS/pmaports/-/raw/master/device/testing/linux-samsung-coreprimevelte-mainline/config-samsung-coreprimevelte-mainline.aarch64)
+   from pmaports
+1. `make` the kernel and create a boot.img using the below script
+
+## Script for creating boot.img
+Written to be run from `out/arch/arm64/boot`. Adapt to your needs.
+
+```sh
+#!/bin/sh
+
+mkimage -A arm64 -C gzip -a 0x1000000 -e 0x1000000 -n "pxa1928dkb linux" -d Image.gz uImage
+~/code/pxa-mkbootimg/pxa1908-dtbTool -p ../../../scripts/dtc/ -s 2048 -o dt.img dts/marvell/
+~/code/pxa-mkbootimg/pxa-mkbootimg \
+    --kernel uImage \
+    --base 0x10000000 \
+    --ramdisk /tmp/postmarketOS-export/initramfs \
+    --ramdisk_offset 0x1000000 \
+    --pagesize 2048 \
+    --dt dt.img \
+    --second_offset 0xf00000 \
+    --tags_offset 0x100 \
+    -o boot.img
+```
+
+## Todo
+- [ ] Early mainlining
+  - [x] Boot
+  - [x] Serial
+  - [x] USB networking
+  - [x] `simplefb`
+  - [x] Boots into rootfs on SD card
+  - [ ] Boots into rootfs on eMMC *(LOW PRIORITY)*
+  - [ ] PMIC driver
+- [ ] U-Boot
+  - [ ] Boot
+  - [ ] Serial (including loading kernel)
+  - [ ] `simplefb`
+  - [ ] Load kernel from external storage
+  - [ ] USB
+  - Don't know what else to put here