Diff for /wikisrc/ports/evbarm/raspberry_pi.mdwn between versions 1.8 and 1.36

version 1.8, 2013/03/03 22:29:07 version 1.36, 2015/03/09 10:43:59
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 [[images/raspberrypi.jpg]]  [[images/raspberrypi.jpg]]
   
 This page attempts to document and coordinate efforts towards NetBSD/evbarm on [Raspberry Pi](http://www.raspberrypi.org).  [[!toc levels=2]]
   
 (Raspberry Pi [image](http://www.flickr.com/photos/42325803@N07/8118758647/) by Christopher Lee used under CC-By-2.0 license)  This page attempts to document and coordinate efforts towards NetBSD/evbarm on [Raspberry Pi](http://www.raspberrypi.org). All board variants are supported.
   
   <small>([Raspberry Pi image](http://www.flickr.com/photos/42325803@N07/8118758647/) by Christopher Lee used under CC-By-2.0 license)</small>
   
 # Installation  # Installation
  - You may use the rpi.img file created by an arm build.   - You may use the rpi.img file created by an evbarm build - evbarm-earmv6hf is recommended. This isn't optimized for Raspberry Pi 2, but allows a single image to be used for all boards.
    - An example can be found in the '/evbarm/binary/gzimg/' directory under releng.netbsd.org     - The Raspberry Pi port will be part of the NetBSD 7 release.
      - The Raspberry Pi 2 port is only in HEAD at present.
      - The automatic nightly builds can be found in the 'evbarm-earmv6hf/binary/gzimg/' directory on [nyftp.netbsd.org](http://nyftp.netbsd.org/pub/NetBSD-daily/).
        - The stable build will be under netbsd-7/YYYYMMDDHHMMZ/evbarm-earmv6hf/binary/gzimg/
        - The HEAD/current build will be under HEAD/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'
      - <i>gunzip and dd</i> this img to your sd card.
   
              dd if=rpi.img of=/dev/disk1
   
    - 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)
   
              edit cmdline.txt and remove '"console=fb"'
   
    - 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
   
           "disklabel -i ld0" and press return.
   
      - At the partition> prompt type "A" and press return.
   
              Adjust disklabel sector from 4194304 to 62333952 [n]?
              Type "y" and press return.
   
      - partition> prompt type "a" and press return.
   
              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.
   
      - partition> prompt type "W" to save the changes to the disklabel.
   
              Confirm this choice by typing "y" at the Label disk prompt.
              Type "Q" and press return to quit disklabel.
   
      - At the # prompt (shell), type
   
              fsck -fy /dev/rld0a
              resize_ffs -y /dev/rld0a
   
      - This may take a few minutes, be patient!
   
              fsck -fy /dev/rld0a
              mount_msdos /dev/ld0e /boot
              mv /boot/cmdline.txt.orig /boot/cmdline.txt
              reboot
   
       - When the system comes back up, the root file-system will have been expanded to
              fill the SD card.
   
   # 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".
      - Be careful to note the ip address given during DHCP so you don't lose your connection
      - Also for after the sysinst is done and the system reboots
    - sysinst started!
   
 # Updating the firmware  # Updating the firmware
  - [rpi firmware files](https://github.com/raspberrypi/firmware/tree/master/boot)   - [rpi firmware files](https://github.com/raspberrypi/firmware/tree/master/boot)
    - Copy all files except 'kernel*img' into /boot and reboot     - Copy all files except 'kernel*.img' into /boot and reboot
   
   # Wireless Networking
    - A Realtek 802.11n USB adaptor configures as urtwn(4).
      - Configure with wpa_supplicant in /etc/rc.conf -
   
              ifconfig_urtwn0=dhcp
              dhcpcd=YES
              dhcpcd_flags="-q -b"
              wpa_supplicant=YES
              wpa_supplicant_flags="-B -i urtwn0 -c /etc/wpa_supplicant.conf"
      - A sample wpa_supplicant.conf can be found at /usr/share/examples/wpa_supplicant/wpa_supplicant.conf
   
   # GPU
   
   ## Video playback
   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.
   
   ## OpenGL ES
   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.
   
   ## Quake 3
   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:
   
    - pak0.pk3 from Quake 3 CD
    - additional pak files from the [games/ioquake3-pk3](http://pkgsrc.se/games/ioquake3-pk3) package
    - read/write permissions on /dev/vchiq and /dev/wsmouse
   
   Place the pak0.pk3 file in the /usr/pkg/lib/ioquake3/baseq3 directory.
   
   ## 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:
   
    - 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
   """]]
   
 # What works  # What works (NetBSD 7.0+)
  - multi-user boot with root on SD card   - multi-user boot with root on SD card
  - serial or graphics console (with EDID query / parsing)   - serial or graphics console (with EDID query / parsing)
  - X windows.   - DMA controller driver and sdhc(4) support
  - USB (host); control, interrupt and bulk transfers. Has some stability issues that are being worked on. man page missing.   - Audio: works. man page missing.
  - USB Ethernet  
  - RNG: works  
  - I²C: works, could use enhancements, man page   - I²C: works, could use enhancements, man page
  - SPI: 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.
   
 # What needs work  # What needs work
  - VCHIQ; work in progress - will provide audio.   - USB (host); isochronous transfers.
  - USB (host); isochronous transfers. DMA support.  
  - DMA controller driver / dmover(9) backend  
  - Teach sdhc(4) about dmover; not Raspberry Pi specific  
  - hardfloat; not Raspberry Pi specific  
  - earm ABI; not Raspberry Pi specific  
  - GPIO  

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  Added in v.1.36


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