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:  - Use the latest HEAD/-current which builds for install
   11:    - As the Raspberry Pi port is still not part the stable release, you will want to use the
   12:      HEAD branch to download installation sets.
   13:    - You may use the rpi.img file created by an evbarm build - evbarm-earmv6hf is recommended, but this is not currently available on nyftp. For now, evbarm-earmhf is best.
   14:    - An example can be found in the 'evbarm-earmhf/binary/gzimg/' directory under releng.netbsd.org
   15:      - On nyftp.netbsd.org/pub/NetBSD-daily/HEAD/YYYYMMDDHHMMZ (it will look like pub/NetBSD-daily/HEAD/201305220150Z)
   16:    - 'releasedir/evbarm/binary/gzimg/' if you run (for example) './build.sh -m evbarm -a earmv6hf -u release'
   17:      - <i>gunzip and dd</i> this img to your sd card.
   18: 
   19: 	   dd if=rpi.img of=/dev/disk1
   20: 
   21:  - Using a serial console
   22:    - 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)
   23: 
   24: 	   edit cmdline.txt and remove '"console=fb"'
   25: 
   26:  - Growing the root file-system
   27:    - During the partitioning process, do not delete or format the
   28:      first MSDOS (FAT) partition, as the Raspberry pi firmware is
   29:      hard coded to boot on the SDCAD / 1st MSDOS partition / Firmware
   30:      updates and boot loader.
   31:    - Copy /boot/cmdline.txt to /boot/cmdline.txt.orig
   32:    - Edit /boot/cmdline.txt and add the '-s' flag to the end of the first line of text to boot into single-user mode.
   33:    - For the next steps, the root filesystem mustn't be mounted rw. So reboot, and at the prompt to enter the pathname of shell,
   34:      press return for the default (/bin/sh).
   35:    - At the # prompt, type
   36: 
   37:         "disklabel -i ld0" and press return.
   38: 
   39:    - At the partition> prompt type "A" and press return.
   40: 
   41:            Adjust disklabel sector from 4194304 to 62333952 [n]?
   42:            Type "y" and press return.
   43: 
   44:    - partition> prompt type "a" and press return.
   45: 
   46:            Filesystem type prompt, press return to use the current value (4.2BSD).
   47:            Start offset prompt, press return to use the current value.
   48:            Partition size prompt, type "$" and press return to grow the
   49:            partition to use all available free space.
   50: 
   51:    - partition> prompt type "W" to save the changes to the disklabel.
   52: 
   53:            Confirm this choice by typing "y" at the Label disk prompt.
   54:            Type "Q" and press return to quit disklabel.
   55: 
   56:    - At the # prompt (shell), type
   57: 
   58:            fsck -fy /dev/rld0a
   59:            resize_ffs -y /dev/rld0a
   60: 
   61:    - This may take a few minutes, be patient!
   62: 
   63:            fsck -fy /dev/rld0a
   64:            mount_msdos /dev/ld0e /boot
   65:            mv /boot/cmdline.txt.orig /boot/cmdline.txt
   66:            reboot
   67: 
   68:     - When the system comes back up, the root file-system will have been expanded to
   69: 	   fill the SD card.
   70: 
   71: # Installation with sshramdisk image
   72:  - You may use the  rpi_inst.img.gz file created by an evbarm build.
   73:  - Connect Ethernet Cable to RPI.
   74:  - After starting DHCP client, SSH login to with user "sysinst", and password "netbsd".
   75:    - Be careful to note the ip address given during DHCP so you don't lose your connection
   76:    - Also for after the sysinst is done and the system reboots
   77:  - sysinst started!
   78: 
   79: # Updating the firmware
   80:  - [rpi firmware files](https://github.com/raspberrypi/firmware/tree/master/boot)
   81:    - Copy all files except 'kernel*.img' into /boot and reboot
   82: 
   83: # Additional links
   84:  - [ARM userland utilities](https://github.com/jaredmcneill/userland)
   85: 
   86: # What works
   87:  - multi-user boot with root on SD card
   88:  - serial or graphics console (with EDID query / parsing)
   89:  - X windows.
   90:  - USB (host) - dwctwo(4)
   91:  - USB Ethernet - usmsc(4)
   92:  - RNG: works
   93:  - I²C: works, could use enhancements, man page
   94:  - SPI: works, could use enhancements, man page
   95:  - VCHIQ: work in progress. man page missing. (-current)
   96:  - Audio: works. man page missing. (-current)
   97: 
   98: # What needs work
   99:  - USB (host); isochronous transfers.
  100:  - DMA controller driver / dmover(9) backend
  101:  - Teach sdhc(4) about dmover; not Raspberry Pi specific
  102:  - GPIO

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