--- wikisrc/ports/evbarm/raspberry_pi.mdwn 2015/02/04 05:17:05 1.31
+++ wikisrc/ports/evbarm/raspberry_pi.mdwn 2017/10/14 15:06:30 1.55
@@ -1,77 +1,72 @@
[[!meta title="NetBSD/evbarm on Raspberry Pi"]]
+This page attempts to document and coordinate efforts towards NetBSD/evbarm on [Raspberry Pi](http://www.raspberrypi.org). All board variants are supported.
+
+Initial, limited, Raspberry Pi support was introduced in NetBSD 6.0. NetBSD 7.0 adds complete support for the board, along with introducing support for the quad-core Raspberry Pi 2 board. Raspberry Pi 3 support was added for NetBSD 8, and backported to NetBSD 7 in July of 2017.
+
[[images/raspberrypi.jpg]]
[[!toc levels=2]]
-This page attempts to document and coordinate efforts towards NetBSD/evbarm on [Raspberry Pi](http://www.raspberrypi.org).
-
([Raspberry Pi image](http://www.flickr.com/photos/42325803@N07/8118758647/) by Christopher Lee used under CC-By-2.0 license)
-# Installation
- - You may use the rpi.img file created by an evbarm build - evbarm-earmv6hf is recommended.
- - The Raspberry Pi port will be part of the NetBSD 7 stable release,
- but you may want to use the HEAD branch for the latest development code.
- - The automatic nightly builds can be found in the 'evbarm-earmv6hf/binary/gzimg/' directory under on [nyftp.netbsd.org](http://nyftp.netbsd.org/pub/NetBSD-daily/).
- - The HEAD/current build will be under HEAD/YYYYMMDDHHMMZ/evbarm-earmv6hf/binary/gzimg/
- - The stable build will be under netbsd-7/YYYYMMDDHHMMZ/evbarm-earmv6hf/binary/gzimg/
- - For example, http://nyftp.netbsd.org/pub/NetBSD-daily/netbsd-7/201412161700Z/evbarm-earmv6hf/binary/gzimg/
- - 'releasedir/evbarm/binary/gzimg/' if you run (for example) './build.sh -m evbarm -a earmv6hf -u release'
- - gunzip and dd this img to your sd card.
+# What works (and what doesn't yet)
- dd if=rpi.img of=/dev/disk1
+## NetBSD 7 before July, 2017
- - Using a serial console
- - By default the rpi.img is set to use the HDMI output; to change to using a serial console first mount rpi.img (it's a FAT filesystem)
+ - RaspberryPi 1, and 2 (including SMP)
+ - multi-user boot with root on SD card
+ - serial or graphics console (with EDID query / parsing)
+ - DMA controller driver and sdhc(4) support
+ - Audio: works. man page missing.
+ - I²C: works, could use enhancements, man page
+ - GPIO
+ - RNG
+ - SPI: could use enhancements, man page
+ - GPU (VCHIQ) - 3D and video decode. man page missing.
+ - USB (host) - dwctwo(4)
+ - USB Ethernet - usmsc(4)
+ - X windows.
- edit cmdline.txt and remove '"console=fb"'
+## NetBSD 7 after July, 2017 and NetBSD 8
- - Growing the root file-system
- - During the partitioning process, do not delete or format the
- first MSDOS (FAT) partition, as the Raspberry pi firmware is
- hard coded to boot on the SDCAD / 1st MSDOS partition / Firmware
- updates and boot loader.
- - Copy /boot/cmdline.txt to /boot/cmdline.txt.orig
- - Edit /boot/cmdline.txt and add the '-s' flag to the end of the first line of text to boot into single-user mode.
- - For the next steps, the root filesystem mustn't be mounted rw. So reboot, and at the prompt to enter the pathname of shell,
- press return for the default (/bin/sh).
- - At the # prompt, type
+ - Raspberry Pi 3 (excluding WiFi and bluetooth)
- "disklabel -i ld0" and press return.
+## NetBSD current
- - At the partition> prompt type "A" and press return.
+ - Raspberry Pi 3 bluetooth
+ - Raspberry Pi 3 new SD host controller driver
- Adjust disklabel sector from 4194304 to 62333952 [n]?
- Type "y" and press return.
+## What needs work
- - partition> prompt type "a" and press return.
+ - USB (host); isochronous transfers.
+ - WiFi
- Filesystem type prompt, press return to use the current value (4.2BSD).
- Start offset prompt, press return to use the current value.
- Partition size prompt, type "$" and press return to grow the
- partition to use all available free space.
+# Installation
- - partition> prompt type "W" to save the changes to the disklabel.
+ - The automatic nightly builds on [nyftp.netbsd.org](http://nyftp.netbsd.org/pub/NetBSD-daily/) provide image files that can be used for installation. The Raspberry Pi and Pi 2 ports are part of the NetBSD 7 release.
+ - The 'evbarm-earmv6hf/binary/gzimg/' directory contains an rpi.img file that can be used as a single image for both boards.
+ - The 'evbarm-earmv7hf/binary/gzimg/' directory, as of August 6th 2015, contains an armv7.img file that is optimized for Raspberry Pi 2.
+ - The stable build directory will be under netbsd-7/YYYYMMDDHHMMZ/ (for example, http://nyftp.netbsd.org/pub/NetBSD-daily/netbsd-7/201412161700Z/evbarm-earmv6hf/binary/gzimg/)
+ - The HEAD/current directory build will be under HEAD/YYYYMMDDHHMMZ/ (for example, http://nyftp.netbsd.org/pub/NetBSD-daily/netbsd-7/201508062150Z/evbarm-earminstv7hf/binary/gzimg/)
+ - You can build your own version of these images using (for example) './build.sh -m evbarm -a earmv6hf -u release', or './build.sh -m evbarm -a earmv7hf -u release'
+ - gunzip and dd this img to your sd card. For example,
- Confirm this choice by typing "y" at the Label disk prompt.
- Type "Q" and press return to quit disklabel.
+ dd if=rpi.img of=/dev/disk1
- - At the # prompt (shell), type
+ - Using a serial console
+ - By default the rpi.img is set to use the HDMI output; to change to using a serial console first mount rpi.img (it's a FAT filesystem)
- fsck -fy /dev/rld0a
- resize_ffs -y /dev/rld0a
+ edit cmdline.txt and remove '"console=fb"'
+
+ - Most (all?) USB-to-TTL serial adapters only connect Tx, Rx and ground, and do not connect any flow control lines. An effect of missing flow control is that you see console output, but cannot type anything. If so, adjust your serial console application's flow control settings to "none".
- - This may take a few minutes, be patient!
+ In Kermit, the command is "set flow none".
- fsck -fy /dev/rld0a
- mount_msdos /dev/ld0e /boot
- mv /boot/cmdline.txt.orig /boot/cmdline.txt
- reboot
+ In minicom, run "minicom -s" and set hardware flow control to "no"
- - When the system comes back up, the root file-system will have been expanded to
- fill the SD card.
+## Installation with sshramdisk image
-# Installation with sshramdisk image
- You may use the rpi_inst.img.gz file created by an evbarm build.
- Connect Ethernet Cable to RPI.
- After starting DHCP client, SSH login to with user "sysinst", and password "netbsd".
@@ -79,11 +74,31 @@ This page attempts to document and coord
- Also for after the sysinst is done and the system reboots
- sysinst started!
-# Updating the firmware
- - [rpi firmware files](https://github.com/raspberrypi/firmware/tree/master/boot)
- - Copy all files except 'kernel*.img' into /boot and reboot
+## Installation via ebijun's image
+
+Jun Ebihara provides an install image for Raspberry Pi that includes
+packages. It is based on NetBSD-current. This image is typically
+updated every few weeks.
+
+ - https://github.com/ebijun/NetBSD/blob/master/RPI/RPIimage/Image/README
+
+## Updating the kernel
+
+ - Build a new kernel, e.g. using build.sh. It will tell you where the ELF version of the kernel is, e.g.
+
+ ...
+ Kernels built from RPI2:
+ /Users/feyrer/work/NetBSD/cvs/src-current/obj.evbarm-Darwin-XXX/sys/arch/evbarm/compile/RPI2/netbsd
+ ...
+
+ - Besides the "netbsd" kernel in ELF format, there is also a "netbsd.bin" kernel that is in a format that the Raspberry can boot.
+ - Depending on your hardware version, copy this either to /boot/kernel.img (First generation Pi, Pi Zero hardware) or to /boot/kernel7.img (Pi 2, Pi 3 hardware)
+ - reboot
# Wireless Networking
+
+ Note that the built-in WiFi in the RPI3 is not yet supported.
+
- A Realtek 802.11n USB adaptor configures as urtwn(4).
- Configure with wpa_supplicant in /etc/rc.conf -
@@ -111,22 +126,41 @@ A Raspberry Pi optimized build of *ioqua
Place the pak0.pk3 file in the /usr/pkg/lib/ioquake3/baseq3 directory.
-# Additional links
- - [ARM userland utilities](https://github.com/jaredmcneill/userland)
-
-# What works (NetBSD 7.0+)
- - multi-user boot with root on SD card
- - serial or graphics console (with EDID query / parsing)
- - DMA controller driver and sdhc(4) support
- - Audio: works. man page missing.
- - I²C: works, could use enhancements, man page
- - GPIO
- - RNG
- - SPI: could use enhancements, man page
- - GPU (VCHIQ) - 3D and video decode. man page missing.
- - USB (host) - dwctwo(4)
- - USB Ethernet - usmsc(4)
- - X windows.
+## RetroArch / Libretro
+Using [emulators/retroarch](http://pkgsrc.se/emulators/retroarch) it is possible to run many emulators at full speed the Raspberry Pi. Emulator cores for various gaming consoles are available in the [emulators/libretro-*](http://pkgsrc.se/search.php?so=libretro-) packages. To begin using retroarch:
-# What needs work
- - USB (host); isochronous transfers.
+ - Install [emulators/retroarch](http://pkgsrc.se/emulators/retroarch)
+ - Install the libretro core for the system you would like to emulate (lets take [emulators/libretro-gambatte](http://pkgsrc.se/emulators/libretro-gambatte), a GameBoy Color emulator, as an example).
+ - Plug in a USB HID compatible Gamepad, such as the Logitech F710 in "DirectInput" mode (set "D/X" switch to "D").
+ - Create a config file for your gamepad using *retroarch-joyconfig*.
+[[!template id=programlisting text="""
+$ retroarch-joyconfig -o gamepad.cfg
+"""]]
+ - Launch the emulator from the command-line (no X required):
+[[!template id=programlisting text="""
+$ retroarch --appendconfig gamepad.cfg -L /usr/pkg/lib/libretro/gambatte_libretro.so game.gbc
+"""]]
+
+# Developer notes
+
+These notes are for people working on improvements to RPI support in NetBSD.
+
+## Updating the firmware
+
+You probably don't want to do this. Firmware updates can break things,
+and the latest firmware that's been tested is already included in the
+NetBSD build you installed.
+
+If you're feeling adventurous (or are the port maintainer), here's what
+to test whenever you try new firmware:
+
+- Audio
+- OMXPlayer (and [[!template id=man name="vchiq"]])
+- Serial/framebuffer console
+- CPU frequency scaling
+
+That goes for all of `rpi[0123]`.
+
+Upstream firmware releases are
+[on GitHub](https://github.com/raspberrypi/firmware/releases).
+Copy all files except `kernel*.img` into `/boot` and reboot.