Diff for /wikisrc/ports/evbarm/raspberry_pi.mdwn between versions 1.47 and 1.55

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 This page attempts to document and coordinate efforts towards NetBSD/evbarm on [Raspberry Pi](http://www.raspberrypi.org). All board variants are supported.  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.  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]]  [[images/raspberrypi.jpg]]
   
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 <small>([Raspberry Pi image](http://www.flickr.com/photos/42325803@N07/8118758647/) by Christopher Lee used under CC-By-2.0 license)</small>  <small>([Raspberry Pi image](http://www.flickr.com/photos/42325803@N07/8118758647/) by Christopher Lee used under CC-By-2.0 license)</small>
   
   # What works (and what doesn't yet)
   
   ## NetBSD 7 before July, 2017
   
    - 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.
   
   ## NetBSD 7 after July, 2017 and NetBSD 8
   
    - Raspberry Pi 3 (excluding WiFi and bluetooth)
   
   ## NetBSD current
   
    - Raspberry Pi 3 bluetooth
    - Raspberry Pi 3 new SD host controller driver
   
   ## What needs work
   
    - USB (host); isochronous transfers.
    - WiFi
   
 # Installation  # Installation
  - 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 will be part of the NetBSD 7 release.  
    - 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-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 '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 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-earmv7hf/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'    - 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'
    - <i>gunzip and dd</i> this img to your sd card. For example,     - <i>gunzip and dd</i> this img to your sd card. For example,
   
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       In minicom, run "minicom -s" and set hardware flow control to "no"        In minicom, run "minicom -s" and set hardware flow control to "no"
   
  - Growing the root file-system (**not required with NetBSD -current after 2015-04-07, or by NetBSD 7 after 2015-08-06**)  ## Installation with sshramdisk image
    - 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.   - You may use the  rpi_inst.img.gz file created by an evbarm build.
  - Connect Ethernet Cable to RPI.   - Connect Ethernet Cable to RPI.
  - After starting DHCP client, SSH login to with user "sysinst", and password "netbsd".   - After starting DHCP client, SSH login to with user "sysinst", and password "netbsd".
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    - Also for after the sysinst is done and the system reboots     - Also for after the sysinst is done and the system reboots
  - sysinst started!   - sysinst started!
   
 # Updating the firmware  ## Installation via ebijun's image
   
 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  Jun Ebihara provides an install image for Raspberry Pi that includes
 - OMXPlayer (and [[!template id=man name="vchiq"]])  packages.  It is based on NetBSD-current.  This image is typically
 - Serial/framebuffer console  updated every few weeks.
 - CPU frequency scaling  
   
 That goes for all of `rpi[0123]`.   - https://github.com/ebijun/NetBSD/blob/master/RPI/RPIimage/Image/README
   
 Upstream firmware releases are  ## Updating the kernel
 [on GitHub](https://github.com/raspberrypi/firmware/releases).  
 Copy all files except `kernel*.img` into `/boot` and reboot.  
   
 # 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.   - Build a new kernel, e.g. using build.sh. It will tell you where the ELF version of the kernel is, e.g.
   
          ...           ...
Line 114  Copy all files except `kernel*.img` into Line 92  Copy all files except `kernel*.img` into
          ...           ...
   
  - Besides the "netbsd" kernel in ELF format, there is also a "netbsd.bin" kernel that is in a format that the Raspberry can boot.   - 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 (old/V1 hardware) or to /boot/kernel7.img (new/V2 hardware)   - 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   - reboot
   
 # Wireless Networking  # 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).   - A Realtek 802.11n USB adaptor configures as urtwn(4).
    - Configure with wpa_supplicant in /etc/rc.conf -     - Configure with wpa_supplicant in /etc/rc.conf -
   
Line 160  $ retroarch-joyconfig -o gamepad.cfg Line 141  $ retroarch-joyconfig -o gamepad.cfg
 $ retroarch --appendconfig gamepad.cfg -L /usr/pkg/lib/libretro/gambatte_libretro.so game.gbc  $ retroarch --appendconfig gamepad.cfg -L /usr/pkg/lib/libretro/gambatte_libretro.so game.gbc
 """]]  """]]
   
 # What works (NetBSD 7.0+)  # Developer notes
  - 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.  
  - RaspberryPi 2 SMP  
   
 # What needs work  These notes are for people working on improvements to RPI support in NetBSD.
  - USB (host); isochronous transfers.  
   ## 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.

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