Annotation of wikisrc/ports/evbarm/raspberry_pi.mdwn, revision 1.92
1.1 jakllsch 1: [[!meta title="NetBSD/evbarm on Raspberry Pi"]]
2:
1.39 wiki 3: This page attempts to document and coordinate efforts towards NetBSD/evbarm on [Raspberry Pi](http://www.raspberrypi.org). All board variants are supported.
4:
1.70 gdt 5: 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. (This page assumes those using NetBSD 7 are using 7.2, or the netbsd-7 branch after mid 2018.)
1.39 wiki 6:
1.3 wiki 7: [[images/raspberrypi.jpg]]
8:
1.26 wiki 9: [[!toc levels=2]]
10:
1.14 wiki 11: <small>([Raspberry Pi image](http://www.flickr.com/photos/42325803@N07/8118758647/) by Christopher Lee used under CC-By-2.0 license)</small>
1.3 wiki 12:
1.54 gdt 13: # What works (and what doesn't yet)
1.53 gdt 14:
1.92 ! gdt 15: \todo Add information on Pi Zero and Pi Zero W.
! 16:
1.70 gdt 17: ## NetBSD 7 and NetBSD 8
1.53 gdt 18:
1.74 gdt 19: - RaspberryPi 1, 2, 3 (except Pi 3 builtin WiFi and bluetooth)
20: - multiple processors on 2/3
21: - boots normally to multiuser, with FAT32 boot partition on uSD
22: - root filesystem can be uSD or USB-attached mass storage
1.53 gdt 23: - serial or graphics console (with EDID query / parsing)
1.74 gdt 24: - X11 via HDMI
25: - GPU (VCHIQ) - 3D and video decode. man page missing.
26: - USB host controller - dwctwo(4) and most devices work
27: - USB Ethernet - usmsc(4)
1.53 gdt 28: - DMA controller driver and sdhc(4) support
1.74 gdt 29: - RNG
1.53 gdt 30: - Audio: works. man page missing.
1.74 gdt 31: - GPIO
1.53 gdt 32: - I²C: works, could use enhancements, man page
33: - SPI: could use enhancements, man page
34:
35: ## NetBSD current
36:
1.74 gdt 37: - Raspberry Pi 3 builtin bluetooth
1.53 gdt 38: - Raspberry Pi 3 new SD host controller driver
39:
1.54 gdt 40: ## What needs work
1.53 gdt 41:
42: - USB (host); isochronous transfers.
1.74 gdt 43: - Raspberry Pi 3 builtin WiFi
1.53 gdt 44:
1.57 gdt 45: # CPU types
46:
1.59 gdt 47: - Raspberry Pi 1 uses "earmv6hf".
1.92 ! gdt 48: - Raspberry Pi Zero uses "\todo".
1.59 gdt 49: - Raspberry Pi 2 uses "earmv7hf".
1.64 gdt 50: - Raspberry Pi 3 uses "earmv7hf".
1.92 ! gdt 51: - Raspberry Pi Zero W uses "\todo".
1.57 gdt 52:
1.74 gdt 53: Note that one can run earmv6hf code on the 2 and 3. See also
54: [[NetBSD/aarch64|aarch64]] for running the Pi 2/3 in 64-bit mode.
1.70 gdt 55:
1.7 wiki 56: # Installation
1.53 gdt 57:
1.62 gdt 58: ## SD card structure
59:
1.86 gdt 60: The Raspberry Pi looks for firmware and kernel.img on the first FAT32 MBR partition of the uSD card. A separate kernel (kernel7.img) is used on RPI2 and RPI3.
61: The NetBSD kernel will then find NetBSD MBR partition and within that the root disklabel partition, and use that FFS partition as the root filesystem.
1.62 gdt 62:
1.86 gdt 63: A 2 GB card is the smallest workable size, and the installation image will fit. After the first boot, the system resizes the NetBSD root partition to fill the card. Note that swap is after /boot and before /, and not contained in the NetBSD fdisk partition. However, if you don't try to change the partition structure, this should not cause you any trouble.
1.63 gdt 64:
1.91 gdt 65: Note that SD cards generally have limited write tolerance, so you may wish to disable atime updates via the noatime option, as is done by the default installation.
66:
1.62 gdt 67: ## Choosing a version
68:
1.71 gdt 69: First, decide if you want to install a formal release (7.2 or 8.0), a stable branch build (netbsd-7, netbsd-8), or NetBSD-current. For people who don't know how to choose among those, 8.0 or netbsd-8 is probably best.
1.65 gdt 70:
71: See also "ebijun's image", below, which is NetBSD-current and includes packages.
1.58 gdt 72:
73: ## Getting bits to install
74:
75: You can either build a release yourself with build.sh, or get one from the NetBSD FTP servers.
76:
1.65 gdt 77: Both will provide rpi.img.gz and rpi_inst.img.gz. Each is an image to be written to a uSD card, and has a FAT32 partition for booting. In rpi.img.gz, there is also an FFS partition for NetBSD.
1.58 gdt 78:
79: ### Building yourself
80:
1.84 gdt 81: Getting sources and building a release with build.sh is not special for evbarm. However, the evbarm port has a very large number of CPU types, compared to i386 and amd64 which have one. The standard approach is to use -m to define MACHINE and -a to define MACHINE_ARCH. build.sh supports aliases that can be passed as a MACHINE value, but denote both MACHINE and a MACHINE_ARCH. The third line uses an alias and is equal to the second in effect, for RPI2/3.
1.66 gdt 82:
1.59 gdt 83: - ./build.sh -m evbarm -a earmv6hf -u release
84: - ./build.sh -m evbarm -a earmv7hf -u release
1.81 gdt 85: - ./build.sh -m earmv7hf-el -u release
86:
87: Consider setting RELEASEMACHINEDIR if you wish to build multiple MACHINE_ARCH values on the same system; see build.sh.
1.58 gdt 88:
1.85 gdt 89: ### NetBSD autobuild HTTPS/FTP servers
1.58 gdt 90:
1.85 gdt 91: NetBSD provides nightly builds on [nyftp.netbsd.org](https://nyftp.netbsd.org/pub/NetBSD-daily/). These are equivalent to building yourself. The next directory level is the branch being built (netbsd-7, netbsd-8, HEAD, and more), plus optionally things like compiler type. It is followed by date/time, e.g. "HEAD/201811051650Z"; once a build is complete the symlink "latest" is adjusted to point to it. The next level is "${MACHINE}-${MACHINE_ARCH}", e.g. "evbarm-earmv7hf", and multiple combinations are provided.
1.58 gdt 92:
1.85 gdt 93: - The 'evbarm-earmv6hf/binary/gzimg/' directory contains an rpi.img file that will run on any of the RPI boards.
94: - The 'evbarm-earmv7hf/binary/gzimg/' directory contains an armv7.img file that uses the armv7 instruction set, and thus can run only on the Raspberry Pi 2/3, but is also faster than rpi.img.
95:
96: An example URL, arguably the standard approach for beginners, is https://nyftp.netbsd.org/pub/NetBSD-daily/netbsd-8/latest/evbarm-earmv7hf/binary/gzimg/
1.58 gdt 97:
1.65 gdt 98: ## Preparing a uSD card
1.10 wiki 99:
1.65 gdt 100: Once you have rpi.img.gz (or rpi_inst), put it on a uSD card using gunzip and dd, for example:
1.14 wiki 101:
1.60 gdt 102: - gunzip rpi.img.gz
1.67 ryoon 103: - dd if=rpi.img of=/dev/disk1
1.14 wiki 104:
1.89 gdt 105: ## Console approaches
106:
107: The standard approach is to use a USB keyboard and an HDMI monitor for installation.
108:
1.58 gdt 109: ### Serial Console
110:
1.89 gdt 111: By default the rpi.img is set to use the HDMI output. If you wish to use a serial console, mount the FAT32 partition on another system and edit cmdline.txt and remove '"console=fb"'.
1.14 wiki 112:
1.89 gdt 113: - Most (all?) USB-to-TTL serial adapters have wires for Tx, Rx and ground, and not RTS/CTS or other flow control lines. Thus, your terminal program (or terminal) must be configured to not require flow control; a symptom of misconfiguration is that you see console output, but cannot type anything. If so, adjust your serial console application's flow control settings to "none".
1.41 wiki 114:
1.89 gdt 115: - In Kermit, the command is "set flow none".
116: - In minicom, run "minicom -s" and set hardware flow control to "no".
1.41 wiki 117:
1.89 gdt 118: ### Enabling ssh for installation without any console
1.41 wiki 119:
1.89 gdt 120: If you want to enable ssh with the standard image, so that you can log in over the net without either a serial or HDMI console, you can edit the configuration of a uSD card before booting. On another computer, mount the ffs partition, place /root/.ssh/authorized_keys, uncomment PermitRootLogin in /etc/ssh/sshd_config, and comment out the rc_configure=NO in /etc/rc.conf. Besides having to find the IP address (e.g. from DHCP server logs), you will have to wait for the partition resizing and reboot.
1.65 gdt 121:
1.89 gdt 122: ### Installation with sshramdisk image
1.65 gdt 123:
1.89 gdt 124: build.sh (and hence the FTP site) also creates an image 'rpi_inst.img.gz' specifically for installation without HDMI or a serial console, when built for earmv6hf. Note that this image is much smaller and that you will need to fetch the sets over the network. To use this method, write that image to a uSD card as above, and then:
1.58 gdt 125:
1.89 gdt 126: - Connect an Ethernet cable from the RPI to a LAN with a DHCP server, and another host you can use for ssh.
127: - Power on the RPI, and wait. Watch the logs on the DHCP server, and find the IP address assigned to the RPI.
128: - Use ssh to login to the address you found with user "sysinst", and password "netbsd".
129: - When installing, ensure that you enable DHCP and ssh, so that you can log in again after the system is installed.
1.53 gdt 130:
1.89 gdt 131: \todo Verify that the above is accurate and sufficient.
1.16 wiki 132:
1.55 gdt 133: ## Installation via ebijun's image
134:
1.58 gdt 135: As an alternative to the standard installation images, Jun Ebihara
136: provides an install image for Raspberry Pi that includes packages. It
137: is based on NetBSD-current and is built for earmv6hf, and thus will
138: work on Raspberry Pi 1, 2 and 3. This image is typically updated
139: every few weeks.
1.55 gdt 140:
1.56 gdt 141: - [https://github.com/ebijun/NetBSD/blob/master/RPI/RPIimage/Image/README](https://github.com/ebijun/NetBSD/blob/master/RPI/RPIimage/Image/README)
1.55 gdt 142:
1.90 gdt 143: ## Links
144:
145: The following pages have been published by NetBSD community members. (Note that some of them are old.)
146:
147: - https://www.cambus.net/netbsd-on-the-raspberry-pi/
148:
1.74 gdt 149: # Maintaining a system
150:
1.78 gdt 151: ## vcgencmd
152:
1.80 gdt 153: The program vcgencmd, referenced in the boot section, can be found in pkgsrc/misc/raspberrypi-userland.
1.78 gdt 154:
1.53 gdt 155: ## Updating the kernel
1.46 schmonz 156:
1.42 wiki 157: - Build a new kernel, e.g. using build.sh. It will tell you where the ELF version of the kernel is, e.g.
158:
159: ...
160: Kernels built from RPI2:
161: /Users/feyrer/work/NetBSD/cvs/src-current/obj.evbarm-Darwin-XXX/sys/arch/evbarm/compile/RPI2/netbsd
162: ...
163:
1.69 rin 164: - Besides the "netbsd" kernel in ELF format, there is also a "netbsd.img" (for current) or "netbsd.bin" (for 7 and 8) kernel that is in a format that the Raspberry can boot.
1.48 sevan 165: - 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)
1.42 wiki 166: - reboot
167:
1.73 gdt 168: ## Updating the firmware
169:
170: A section below describes the process of updating NetBSD's copy of the firmware from upstream, with testing, by NetBSD developers. This section is about updating a system's firmware from the firmware in a version of NetBSD.
171:
1.88 gdt 172: \todo Explain where the firmware is in the source tree, and if it is in the installed system image (such as /usr/mdec). Explain how to update a system (presumably /boot) from either an installed system's new firmware files, or the source tree. Explain any particular cautions.
1.73 gdt 173:
1.75 gdt 174: ## Booting
175:
1.79 gdt 176: The device boots by finding a file "bootcode.bin". The primary location is a FAT32 partition on the uSD card, and an additional location is on a USB drive. See the [upstream documentation on booting](https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/) and read all the subpages.
1.75 gdt 177:
178: The standard approach is to use a uSD card, with a fdisk partition table containing a FAT32 partition marked active, and a NetBSD partition. The NetBSD partition will then contain a disklabel, pointing to an FFS partition (a), a swap paritiion (b) and the FAT32 boot partition mounted as /boot (e). The file /boot/cmdline.txt has a line to set the root partition.
179:
1.77 gdt 180: One wrinkle in the standard approach is that the disk layout is "boot swap /", but the NetBSD fdisk partition starts at the location of /. The / partition can hold a disklabel, while swap cannot. It is normal to have swap after / (and thus within the fdisk partition), but the arrangement used permits growing / on first boot, for the typical case where a larger uSD is used, compared to the minimum image size.
1.75 gdt 181:
1.77 gdt 182: An alternate approach is to have the boot FAT32 partition as above, but to have the entire system including root on an external disk. This is configured by changing root=ld0a to root=sd0a or root=dk0 (depending on disklabel/GPT). Besides greater space, part of the point is to avoid writing to the uSD card.
1.75 gdt 183:
1.80 gdt 184: A third approach, workable on the Pi 3 only, is to configure USB host booting (already enableed on the 3+; see the upstream documentation) and have the boot partition also on the external device. In this case the external device must have an MBR because the hardware's first-stage boot does not have GPT support. In theory the [procedure to program USB host boot mode](https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/msd.md) will function on a NetBSD system because the programming is done by bootcode.bin.
185: \todo Confirm that putting program_usb_boot_mode=1 in config.txt and booting works to program the OTP bit. Confirm that one can then boot NetBSD from external USB.
1.75 gdt 186:
187: \todo Explain USB enumeration and how to ensure that the correct boot and root devices are found if one has e.g. a small SSD for the system and a big disk.
188:
1.24 wiki 189: # Wireless Networking
1.53 gdt 190:
1.75 gdt 191: Note that the built-in WiFi in the RPI3 is not yet supported. USB WiFi interfaces (that work on NetBSD in general) should all work.
1.53 gdt 192:
1.24 wiki 193: - A Realtek 802.11n USB adaptor configures as urtwn(4).
1.25 wiki 194: - Configure with wpa_supplicant in /etc/rc.conf -
1.24 wiki 195:
196: ifconfig_urtwn0=dhcp
197: dhcpcd=YES
198: dhcpcd_flags="-q -b"
199: wpa_supplicant=YES
200: wpa_supplicant_flags="-B -i urtwn0 -c /etc/wpa_supplicant.conf"
1.25 wiki 201: - A sample wpa_supplicant.conf can be found at /usr/share/examples/wpa_supplicant/wpa_supplicant.conf
1.24 wiki 202:
1.27 wiki 203: # GPU
204:
205: ## Video playback
1.29 wiki 206: Accelerated video playback is supported in NetBSD 7 with the [OMXPlayer](http://pkgsrc.se/multimedia/omxplayer) application and through GStreamer with the [omx](http://pkgsrc.se/multimedia/gst-plugins1-omx) plugin.
1.27 wiki 207:
208: ## OpenGL ES
209: Accelerated OpenGL ES is supported in NetBSD 7. The GL ES client libraries are included with the [misc/raspberrypi-userland](http://pkgsrc.se/misc/raspberrypi-userland) package.
210:
1.28 wiki 211: ## Quake 3
1.27 wiki 212: A Raspberry Pi optimized build of *ioquake3* is available in the [games/ioquake3-raspberrypi](http://pkgsrc.se/games/ioquake3-raspberrypi) package. To use it, the following additional resources are required:
213:
214: - pak0.pk3 from Quake 3 CD
1.31 snj 215: - additional pak files from the [games/ioquake3-pk3](http://pkgsrc.se/games/ioquake3-pk3) package
1.27 wiki 216: - read/write permissions on /dev/vchiq and /dev/wsmouse
217:
1.31 snj 218: Place the pak0.pk3 file in the /usr/pkg/lib/ioquake3/baseq3 directory.
1.27 wiki 219:
1.32 wiki 220: ## RetroArch / Libretro
221: 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:
222:
223: - Install [emulators/retroarch](http://pkgsrc.se/emulators/retroarch)
224: - 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).
225: - Plug in a USB HID compatible Gamepad, such as the Logitech F710 in "DirectInput" mode (set "D/X" switch to "D").
226: - Create a config file for your gamepad using *retroarch-joyconfig*.
227: [[!template id=programlisting text="""
1.35 wiki 228: $ retroarch-joyconfig -o gamepad.cfg
1.32 wiki 229: """]]
230: - Launch the emulator from the command-line (no X required):
231: [[!template id=programlisting text="""
232: $ retroarch --appendconfig gamepad.cfg -L /usr/pkg/lib/libretro/gambatte_libretro.so game.gbc
233: """]]
234:
1.53 gdt 235: # Developer notes
1.50 gdt 236:
1.53 gdt 237: These notes are for people working on improvements to RPI support in NetBSD.
1.50 gdt 238:
1.72 gdt 239: ## Updating the firmware version in the NetBSD sources
1.50 gdt 240:
1.72 gdt 241: (Note that trying new firmware may result in a non-bootable system, so
242: be prepared to recover the bootable media with another system.)
1.50 gdt 243:
1.72 gdt 244: Upstream firmware releases are
245: [on GitHub](https://github.com/raspberrypi/firmware/releases).
246: Copy all files except `kernel*.img` into `/boot` and reboot.
247:
248: New firmware should pass all of the following tests before being committed to NetBSD.
1.50 gdt 249:
1.53 gdt 250: - Audio
251: - OMXPlayer (and [[!template id=man name="vchiq"]])
252: - Serial/framebuffer console
253: - CPU frequency scaling
1.50 gdt 254:
1.92 ! gdt 255: Tests should be run on all of `rpi[0123]`.
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