File:  [NetBSD Developer Wiki] / wikisrc / ports / evbarm / raspberry_pi.mdwn
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    1: [[!meta title="NetBSD/evbarm on Raspberry Pi"]]
    2: 
    3: [[images/raspberrypi.jpg]]
    4: 
    5: This page attempts to document and coordinate efforts towards NetBSD/evbarm on [Raspberry Pi](http://www.raspberrypi.org).
    6: 
    7: <small>([Raspberry Pi image](http://www.flickr.com/photos/42325803@N07/8118758647/) by Christopher Lee used under CC-By-2.0 license)</small>
    8: 
    9: # Installation
   10:  - You may use the rpi.img file created by an arm build.
   11:    - An example can be found in the '/evbarm/binary/gzimg/' directory under releng.netbsd.org
   12:      - <i>gunzip and dd</i> this img to your sd card.
   13: 
   14: 	   dd if=rpi.img of=/dev/disk1
   15: 
   16:  - Using a serial console
   17:    - By default the rpi.img is set to use the HDMI output; to change mount rpi.img (it's a FAT filesystem)
   18: 
   19: 	   edit cmdline.txt and remove '"console=fb"'
   20:    - proceed with the 'dd'
   21: 
   22:  - Growing the root file-system
   23:    - Copy /boot/cmdline.txt to /boot/cmdline.txt.orig
   24:    - Edit /boot/cmdline.txt and add the '-s' flag to the end of the first line of text.
   25:    - Reboot, and at the prompt to enter the passname of shell, press
   26: 	   return for the default (/bin/sh).
   27:    - At the # prompt, type
   28: 
   29:         "disklabel -i ld0" and press return.
   30:    - At the partition> prompt
   31: 
   32:            type "A" and press return. You will see
   33:    - a message like:
   34: 
   35:            Adjust disklabel sector from 4194304 to 62333952 [n]?
   36:            Type "y" and press return.
   37:    - partition> prompt
   38: 
   39:            type "a" and press return.
   40:            Filesystem type prompt, press return to use the current value (4.2BSD).
   41:            Start offset prompt, press return to use the current value.
   42:            Partition size prompt, type "$" and press return to grow the
   43:            partition to use all available free space.
   44: 
   45:    - partition> prompt
   46: 
   47:            type "W" to save the changes to the disklabel.
   48:            Confirm this choice by typing "y" at the Label disk prompt.
   49:            Type "Q" and press return to quit disklabel.
   50:    - At the # prompt, type
   51: 
   52:            fsck -fy /dev/rld0a
   53:            resize_ffs -y /dev/rld0a
   54:    - This may take a few minutes, be patient!
   55: 
   56:            fsck -fy /dev/rld0a
   57:            mount /dev/ld0e /boot
   58:            mv /boot/cmdline.txt.orig /boot/cmdline.txt
   59:            reboot
   60:     - When the system comes back up, the root file-system will have been expanded to
   61: 	   fill the SD card.
   62: 
   63: # Updating the firmware
   64:  - [rpi firmware files](https://github.com/raspberrypi/firmware/tree/master/boot)
   65:    - Copy all files except 'kernel*img' into /boot and reboot
   66: 
   67: # Additional links
   68:  - [ARM userland utilities](https://github.com/jaredmcneill/userland)
   69: 
   70: # What works
   71:  - multi-user boot with root on SD card
   72:  - serial or graphics console (with EDID query / parsing)
   73:  - X windows.
   74:  - USB (host); control, interrupt and bulk transfers. Has some stability issues that are being worked on. man page missing.
   75:  - USB Ethernet
   76:  - RNG: works
   77:  - I²C: works, could use enhancements, man page
   78:  - SPI: works, could use enhancements, man page
   79:  - VCHIQ: work in progress. man page missing. (-current)
   80:  - Audio: works. man page missing. (-current)
   81: 
   82: # What needs work
   83:  - USB (host); isochronous transfers. DMA support.
   84:  - DMA controller driver / dmover(9) backend
   85:  - Teach sdhc(4) about dmover; not Raspberry Pi specific
   86:  - hardfloat; not Raspberry Pi specific
   87:  - earm ABI; not Raspberry Pi specific
   88:  - GPIO

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