From 2fb6962bf02c489142793122054b57a00cf556e8 Mon Sep 17 00:00:00 2001 From: Peter Seiderer Date: Wed, 19 May 2021 23:51:14 +0200 Subject: [PATCH] board/raspberrypi: add Compute Module 4/IO Board support Signed-off-by: Peter Seiderer Signed-off-by: Yann E. MORIN --- .../raspberrypi/genimage-raspberrypicm4io.cfg | 30 ++++++++++++++ board/raspberrypi/readme.txt | 34 +++++++++++++++ board/raspberrypicm4io | 1 + configs/raspberrypicm4io_defconfig | 41 +++++++++++++++++++ 4 files changed, 106 insertions(+) create mode 100644 board/raspberrypi/genimage-raspberrypicm4io.cfg create mode 120000 board/raspberrypicm4io create mode 100644 configs/raspberrypicm4io_defconfig diff --git a/board/raspberrypi/genimage-raspberrypicm4io.cfg b/board/raspberrypi/genimage-raspberrypicm4io.cfg new file mode 100644 index 0000000000..5a42bcfbb4 --- /dev/null +++ b/board/raspberrypi/genimage-raspberrypicm4io.cfg @@ -0,0 +1,30 @@ +image boot.vfat { + vfat { + files = { + "bcm2711-rpi-cm4.dtb", + "rpi-firmware/cmdline.txt", + "rpi-firmware/config.txt", + "rpi-firmware/fixup.dat", + "rpi-firmware/start.elf", + "rpi-firmware/overlays", + "zImage" + } + } + size = 32M +} + +image sdcard.img { + hdimage { + } + + partition boot { + partition-type = 0xC + bootable = "true" + image = "boot.vfat" + } + + partition rootfs { + partition-type = 0x83 + image = "rootfs.ext4" + } +} diff --git a/board/raspberrypi/readme.txt b/board/raspberrypi/readme.txt index 2a876f9ae4..2032bf80ed 100644 --- a/board/raspberrypi/readme.txt +++ b/board/raspberrypi/readme.txt @@ -9,6 +9,7 @@ These instructions apply to all models of the Raspberry Pi: - the model B2 (aka Raspberry Pi 2) - the model B3 (aka Raspberry Pi 3). - the model B4 (aka Raspberry Pi 4). + - the model CM4 (aka Raspberry Pi Compute Module 4 and IO Board). How to build it =============== @@ -47,6 +48,10 @@ or for model 4 B (64 bit): $ make raspberrypi4_64_defconfig +For model CM4 (on IO Board): + + $ make raspberrypicm4io_defconfig + Build the rootfs ---------------- @@ -71,6 +76,7 @@ After building, you should obtain this tree: +-- bcm2710-rpi-3-b.dtb [1] +-- bcm2710-rpi-3-b-plus.dtb [1] +-- bcm2711-rpi-4-b.dtb [1] + +-- bcm2711-rpi-cm4.dtb [1] +-- boot.vfat +-- rootfs.ext4 +-- rpi-firmware/ @@ -105,3 +111,31 @@ Insert the SDcard into your Raspberry Pi, and power it up. Your new system should come up now and start two consoles: one on the serial port on the P1 header, one on the HDMI output where you can login using a USB keyboard. + +How to write to CM4 eMMC memory +=============================== + +For CM4 modules without eMMC memory see above for booting from SD card, +for CM4 moduels with eMMC memory proceed as following: + +- fit jumper on IO Board header J2 to disable eMMC boot +- connect IO Board micro USB port (J11 USB slave) to your host linux system +- power up CM4/IO Board (lsusb command should show a '0a5c:2711 Broadcom Corp. + BCM2711 Boot' device) +- run 'sudo ./host/bin/rpiboot', output should look like the following: + Waiting for BCM2835/6/7/2711... + Loading embedded: bootcode4.bin + Sending bootcode.bin + Successful read 4 bytes + Waiting for BCM2835/6/7/2711... + Loading embedded: bootcode4.bin + Second stage boot server + Loading embedded: start4.elf + File read: start4.elf + Second stage boot server done + +- a USB mass storage device should show up (the CM4 eMMC memory), proceed + as described above to copy sdcard.img to it +- power down CM4/IO Board +- remove jumper on IO Board header J2 to re-enable eMMC boot +- power up CM4/IO Board diff --git a/board/raspberrypicm4io b/board/raspberrypicm4io new file mode 120000 index 0000000000..fcdafc81ed --- /dev/null +++ b/board/raspberrypicm4io @@ -0,0 +1 @@ +raspberrypi \ No newline at end of file diff --git a/configs/raspberrypicm4io_defconfig b/configs/raspberrypicm4io_defconfig new file mode 100644 index 0000000000..cba07a9064 --- /dev/null +++ b/configs/raspberrypicm4io_defconfig @@ -0,0 +1,41 @@ +BR2_arm=y +BR2_cortex_a72=y +BR2_ARM_FPU_NEON_VFPV4=y + +BR2_TOOLCHAIN_BUILDROOT_CXX=y + +BR2_SYSTEM_DHCP="eth0" + +# Linux headers same as kernel, a 5.10 series +BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y + +BR2_LINUX_KERNEL=y +BR2_LINUX_KERNEL_CUSTOM_TARBALL=y +BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,b657cd2f27d9171b75c846f21e7b4bb581b3ed29)/linux-b657cd2f27d9171b75c846f21e7b4bb581b3ed29.tar.gz" +BR2_LINUX_KERNEL_DEFCONFIG="bcm2711" + +# Build the DTB from the kernel sources +BR2_LINUX_KERNEL_DTS_SUPPORT=y +BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2711-rpi-cm4" + +BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y + +BR2_PACKAGE_RPI_FIRMWARE=y +BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI4=y + +# Required tools to create the SD image +BR2_PACKAGE_HOST_DOSFSTOOLS=y +BR2_PACKAGE_HOST_GENIMAGE=y +BR2_PACKAGE_HOST_MTOOLS=y + +# Required tool to flash CM4 eMMC memory +BR2_PACKAGE_HOST_RASPBERRYPI_USBBOOT + +# Filesystem / image +BR2_TARGET_ROOTFS_EXT2=y +BR2_TARGET_ROOTFS_EXT2_4=y +BR2_TARGET_ROOTFS_EXT2_SIZE="120M" +# BR2_TARGET_ROOTFS_TAR is not set +BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypicm4io/post-build.sh" +BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypicm4io/post-image.sh" +BR2_ROOTFS_POST_SCRIPT_ARGS="--add-miniuart-bt-overlay" -- 2.30.2