File:  [NetBSD Developer Wiki] / wikisrc / ports / evbarm / raspberry_pi.mdwn
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    1: [[!meta title="NetBSD/evbarm on Raspberry Pi"]]
    2: 
    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: 
    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.
    6: 
    7: [[images/raspberrypi.jpg]]
    8: 
    9: [[!toc levels=2]]
   10: 
   11: <small>([Raspberry Pi image](http://www.flickr.com/photos/42325803@N07/8118758647/) by Christopher Lee used under CC-By-2.0 license)</small>
   12: 
   13: # Installation
   14:  - 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.
   15:     - The 'evbarm-earmv6hf/binary/gzimg/' directory contains an rpi.img file that can be used as a single image for both boards.
   16:     - The 'evbarm-earmv7hf/binary/gzimg/' directory, as of August 6th 2015, contains an armv7.img file that is optimized for Raspberry Pi 2.
   17:     - 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/)
   18:     - The HEAD/current directory build will be under HEAD/YYYYMMDDHHMMZ/ (for example, http://nyftp.netbsd.org/pub/NetBSD-daily/netbsd-7/201508062150Z/evbarm-earmv7hf/binary/gzimg/)
   19:   - 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'
   20:    - <i>gunzip and dd</i> this img to your sd card. For example,
   21: 
   22: 	   dd if=rpi.img of=/dev/disk1
   23: 
   24:  - Using a serial console
   25:    - 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)
   26: 
   27: 	   edit cmdline.txt and remove '"console=fb"'
   28: 
   29:    - 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".
   30: 
   31:       In Kermit, the command is "set flow none".
   32: 
   33:       In minicom, run "minicom -s" and set hardware flow control to "no"
   34: 
   35: # Installation with sshramdisk image
   36:  - You may use the  rpi_inst.img.gz file created by an evbarm build.
   37:  - Connect Ethernet Cable to RPI.
   38:  - After starting DHCP client, SSH login to with user "sysinst", and password "netbsd".
   39:    - Be careful to note the ip address given during DHCP so you don't lose your connection
   40:    - Also for after the sysinst is done and the system reboots
   41:  - sysinst started!
   42: 
   43: # Updating the firmware
   44: 
   45: You probably don't want to do this. Firmware updates can break things,
   46: and the latest firmware that's been tested is already included in the
   47: NetBSD build you installed.
   48: 
   49: If you're feeling adventurous (or are the port maintainer), here's what
   50: to test whenever you try new firmware:
   51: 
   52: - Audio
   53: - OMXPlayer (and [[!template id=man name="vchiq"]])
   54: - Serial/framebuffer console
   55: - CPU frequency scaling
   56: 
   57: That goes for all of `rpi[0123]`.
   58: 
   59: Upstream firmware releases are
   60: [on GitHub](https://github.com/raspberrypi/firmware/releases).
   61: Copy all files except `kernel*.img` into `/boot` and reboot.
   62: 
   63: # Updating the kernel
   64:  - Build a new kernel, e.g. using build.sh. It will tell you where the ELF version of the kernel is, e.g.
   65: 
   66:          ...
   67:          Kernels built from RPI2:
   68:           /Users/feyrer/work/NetBSD/cvs/src-current/obj.evbarm-Darwin-XXX/sys/arch/evbarm/compile/RPI2/netbsd
   69:          ...
   70: 
   71:  - Besides the "netbsd" kernel in ELF format, there is also a "netbsd.bin" kernel that is in a format that the Raspberry can boot.
   72:  - 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)
   73:  - reboot
   74: 
   75: # Wireless Networking
   76:  - A Realtek 802.11n USB adaptor configures as urtwn(4).
   77:    - Configure with wpa_supplicant in /etc/rc.conf -
   78: 
   79:            ifconfig_urtwn0=dhcp
   80:            dhcpcd=YES
   81:            dhcpcd_flags="-q -b"
   82:            wpa_supplicant=YES
   83:            wpa_supplicant_flags="-B -i urtwn0 -c /etc/wpa_supplicant.conf"
   84:    - A sample wpa_supplicant.conf can be found at /usr/share/examples/wpa_supplicant/wpa_supplicant.conf
   85: 
   86: # GPU
   87: 
   88: ## Video playback
   89: 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.
   90: 
   91: ## OpenGL ES
   92: 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.
   93: 
   94: ## Quake 3
   95: 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:
   96: 
   97:  - pak0.pk3 from Quake 3 CD
   98:  - additional pak files from the [games/ioquake3-pk3](http://pkgsrc.se/games/ioquake3-pk3) package
   99:  - read/write permissions on /dev/vchiq and /dev/wsmouse
  100: 
  101: Place the pak0.pk3 file in the /usr/pkg/lib/ioquake3/baseq3 directory.
  102: 
  103: ## RetroArch / Libretro
  104: 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:
  105: 
  106:  - Install [emulators/retroarch](http://pkgsrc.se/emulators/retroarch)
  107:  - 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).
  108:  - Plug in a USB HID compatible Gamepad, such as the Logitech F710 in "DirectInput" mode (set "D/X" switch to "D").
  109:  - Create a config file for your gamepad using *retroarch-joyconfig*.
  110: [[!template  id=programlisting text="""
  111: $ retroarch-joyconfig -o gamepad.cfg
  112: """]]
  113:  - Launch the emulator from the command-line (no X required):
  114: [[!template  id=programlisting text="""
  115: $ retroarch --appendconfig gamepad.cfg -L /usr/pkg/lib/libretro/gambatte_libretro.so game.gbc
  116: """]]
  117: 
  118: # What works
  119: 
  120: ## NetBSD 7 before July, 2017
  121: 
  122:  - RaspberryPi 1, and 2 (including SMP)
  123:  - multi-user boot with root on SD card
  124:  - serial or graphics console (with EDID query / parsing)
  125:  - DMA controller driver and sdhc(4) support
  126:  - Audio: works. man page missing.
  127:  - I²C: works, could use enhancements, man page
  128:  - GPIO
  129:  - RNG
  130:  - SPI: could use enhancements, man page
  131:  - GPU (VCHIQ) - 3D and video decode. man page missing.
  132:  - USB (host) - dwctwo(4)
  133:  - USB Ethernet - usmsc(4)
  134:  - X windows.
  135: 
  136: ## NetBSD 7 after July, 2017 and NetBSD 8
  137: 
  138:  - Raspberry Pi 3 (excluding wifi and bluetooth)
  139: 
  140: ## NetBSD current
  141: 
  142:  - Raspberry Pi 3 bluetooth
  143:  - Raspberry Pi 3 new SD host controller driver
  144: 
  145: # What needs work
  146:  - USB (host); isochronous transfers.

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