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| author | Francis Rowe <info@gluglug.org.uk> | 2015-11-06 22:43:29 +0000 |
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| committer | Francis Rowe <info@gluglug.org.uk> | 2015-11-07 04:45:09 +0000 |
| commit | 95259e28ef047923258434898113d70c8e544eab (patch) | |
| tree | 1c0501bf4c7df1c31948184dabfc1e7c4c215a6e /docs/install/bbb_setup.html | |
| parent | 707f9383a8189b0054730134340f20709f56f976 (diff) | |
| download | librebootfr-95259e28ef047923258434898113d70c8e544eab.tar.gz librebootfr-95259e28ef047923258434898113d70c8e544eab.zip | |
convert documentation to texinfo
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diff --git a/docs/install/bbb_setup.html b/docs/install/bbb_setup.html deleted file mode 100644 index f3f93d55..00000000 --- a/docs/install/bbb_setup.html +++ /dev/null @@ -1,469 +0,0 @@ -<!DOCTYPE html> -<html> -<head> - <meta charset="utf-8"> - <meta name="viewport" content="width=device-width, initial-scale=1"> - - <style type="text/css"> - @import url('../css/main.css'); - </style> - - <title>How to program an SPI flash chip with the BeagleBone Black</title> -</head> - -<body> - - <div class="section"> - <h1 id="pagetop">How to program an SPI flash chip with the BeagleBone Black</h1> - <p> - This document exists as a guide for reading from or writing to an SPI flash chip with the BeagleBone Black, - using the <a href="http://flashrom.org/Flashrom">flashrom</a> software. - BeagleBone Black rev. C was used when creating this guide, but earlier revisions - may also work. - </p> - <p><a href="index.html">Back to previous index</a></p> - </div> - - <div class="section" id="hardware_requirements"> - - <h1>Hardware requirements</h1> - - <p> - Shopping list (pictures of this hardware is shown later): - </p> - <ul> - <li> - External SPI programmer: <b>BeagleBone Black</b> (rev. C) - is highly recommended. Sometimes referred to as 'BBB'. - <a href="http://beagleboard.org/black">This page</a> contains a list of distributors. - farnell sells them - <a href="http://farnell.com/">http://farnell.com/</a> - - If you can't get a BBB, there are other programmers listed on flashrom.org, but - not all of them will be suitable for libreboot's purpose. (some may also require blobs. all BBs and BBBs though can be used without blobs). - There are also some programmers not listed on flashrom.org, that can also work. - A BB (original beaglebone) should work as well, though you might have to replace the distro - that it came with. - </li> - <li> - Electrical/insulative tape: cover the entire bottom surface of the BBB (the part that - rests on a surface). This is important, when placing the BBB on top of a board - so that nothing shorts. - easy to find in most hardware/electronics stores - </li> - <li> - Clip for connecting to the flash chip: if you have a SOIC-16 - flash chip (16 pins), you will need the <b>Pomona 5252</b> - or equivalent. For SOIC-8 flash chips (8 pins), you will - need the <b>Pomona 5250</b> or equivalent. Do check which chip you have, - before ordering a clip. Also, make sure to buy at least two clips - (they break easily). - - Farnell sells these, and ships to many countries. <a href="http://farnell.com/">http://farnell.com/</a> - - Some people find these difficult to get, especially in South America. If you have more links to suppliers, - please contact the libreboot project with the relevant information. - - <b>if you can't get a pomona clip, some other clips might work (eg 3M) but are not always reliable. You can also - directly solder the wires to the chip, if that suits you. The clip is just for convenience, really.</b> - </li> - <li> - <b>External 3.3V DC power supply</b>, for powering the flash chip. - An ATX power supply / PSU (common on Intel/AMD desktop computers) will work for this. - A lab PSU (DC) will also work (adjusted to 3.3V). Etc. - <ul> - <li>Getting a multimeter might be worthwhile, to verify that it's supplying 3.3V</li> - </ul> - </li> - <li> - <b>External 5V DC power supply</b> (barrel connector), for powering the BBB. - The BeagleBone can have power supplied via USB, but a - dedicated power supply is recommended. These should be easy to find in most places - that sell electronics. - <b>OPTIONAL. Only needed if not powering with the USB cable, or if you want - to use <a href="bbb_ehci.html">EHCI debug</a></b> - </li> - <li> - <b>Pin header / jumper cables</b> (2.54mm / 0.1" headers) - You should get male-male, male-female and female-female - cables in 10cm size. Just get a load of them. - other possible names for these cables: - <ul> - <li>flying leads</li> - <li>dupont (this is just one possible brand name)</li> - <li>Often used on breadboards, so they might be called breadboard cables</li> - <li>Maybe they are called <b>wires</b> instead of cables or leads</li> - <li>They are also the same cables used on the GPIOs on the RPi</li> - <li><b>adafruit.com</b> sells them, and there are others</li> - <li><b>Some people find these difficult to buy. Contact the libreboot project if you have more links to sellers.</b></li> - <li>You might also be able to make these cables yourself.</li> - </ul> - For PSU connections, long cables (e.g. 20cm) is fine, and you can extend it longer than that if needed. - </li> - <li> - <b>Mini USB A-B cable</b> (the BeagleBone probably already comes - with one.) - <b>OPTIONAL - only needed for <a href="bbb_ehci.html">EHCI debug</a> or for serial/ssh access without ethernet cable (g_multi kernel module)</b> - </li> - <li> - <b>FTDI TTL cable or debug board</b>, for accessing the serial console on your BBB. - <a href="http://elinux.org/Beagleboard:BeagleBone_Black_Serial">This page</a> contains - a list. - <b>OPTIONAL - only needed for serial console on the BBB, if not using SSH via ethernet cable</b> - </li> - </ul> - - <p> - <a href="#pagetop">Back to top of page.</a> - </p> - - </div> - - <div class="section" id="psu33"> - - <h1>Setting up the 3.3V DC PSU</h1> - - <p> - ATX PSU pinouts are on <a href="https://en.wikipedia.org/wiki/Power_supply_unit_%28computer%29#Wiring_diagrams">wikipedia</a> - </p> - <p> - You can use pin 1 or 2 (orange wire) on a 20-pin or 24-pin ATX PSU for 3.3V, - and any of the ground/earth sources (black cables) for ground. - Short PS_ON# / Power on (green wire. pin 16 on 24-pin ATX PSU, or pin 14 on a 20-pin ATX PSU) to a ground - (black. there is one right next to it) using a wire/paperclip/jumper then - power on the PSU by grounding PS_ON# (this is also how an ATX motherboard turns on a PSU). - </p> - <p> - <b>DO **NOT** use pin 4, 6, do **NOT** use pin 19 or 20 (on a 20-pin ATX PSU), and - DO **NOT** use pin 21, 22 or 23 (on a 24-pin ATX PSU). Those wires (the red ones) are 5V, and they **WILL** - kill your flash chip. ***NEVER*** supply more than 3.3V to your flash chip. - (that is, if it's a 3.3V flash chip. 5V and 1.8V SPI flash chips do exist, but they are rare. always - check what voltage your chip takes. most take 3.3V)</b> - </p> - <p> - You only need one 3.3V supply and one ground for the flash chip, after grounding PS_ON#. - </p> - - <p> - The male end of a 0.1" or 2.54mm header cable is not thick enough to remain permanently - connected to the ATX PSU on its own. - When connecting header cables to the connector on the ATX PSU, use a female end attached to - a thicker piece of wire (you could use a paper clip), or wedge the male end of the jumper cable - into the sides of the hole in the connector, instead of going through the centre. - </p> - - <p> - Here is an example set up:<br/> - <img src="images/x200/psu33.jpg" alt="" title="Copyright © 2015 Patrick "P. J." McDermott <pj@pehjota.net> see license notice at the end of this document" /> - </p> - - </div> - - <div class="section" id="bbb_access"> - - <h1>Accessing the operating system on the BBB</h1> - <p> - The operating system on your BBB will probably have an SSH daemon - running where the root account has no password. Use SSH to access - the operating system and set a root password. By default, the OS - on your BBB will most likely use DHCP, so it should already have an IP - address. - </p> - <p> - You will also be using the OS on your BBB for programming an SPI flash chip. - </p> - <h2>Alternatives to SSH (in case SSH fails)</h2> - <p> - You can also use a serial FTDI debug board with GNU Screen, to access the serial console.<br/> - # <b>screen /dev/ttyUSB0 115200</b><br/> - Here are some example photos:<br/> - <img src="images/x200/ftdi.jpg" alt="" /> - <img src="images/x200/ftdi_port.jpg" alt="" /><br/> - </p> - <p> - You can also connect the USB cable from the BBB to another computer and a new network interface will appear, - with its own IP address. This is directly accessible from SSH, or screen:<br/> - # <b>screen /dev/ttyACM0 115200</b> - </p> - <p> - You can also access the uboot console, using the serial method - instead of SSH. - </p> - - </div> - - <div class="section" id="spidev"> - - <h1>Setting up spidev on the BBB</h1> - - <p> - Log on as root on the BBB, using either SSH or a serial console as defined in - <a href="#bbb_access">#bbb_access</a>. Make sure that you have internet access - on your BBB. - </p> - - <p> - Follow the instructions at <a href="http://elinux.org/BeagleBone_Black_Enable_SPIDEV#SPI0">http://elinux.org/BeagleBone_Black_Enable_SPIDEV#SPI0</a> - up to (and excluding) the point where it tells you to modify uEnv.txt - </p> - <p> - You need to update the software on the BBB first. If you have an - element14 brand BBB (sold by Premier Farnell plc. stores like - Farnell element14, Newark element14, and Embest), you may need - to <a href="https://groups.google.com/forum/?_escaped_fragment_=msg/beagleboard/LPjCn4LEY2I/alozBGsbTJMJ#!msg/beagleboard/LPjCn4LEY2I/alozBGsbTJMJ">work around a bug</a> - in the LED aging init script before you can update your - software. If you don't have a file named - /etc/init.d/led_aging.sh, you can skip this step and update your - software as described below. Otherwise, replace the contents of - this file with: - </p> -<pre> -#!/bin/sh -e -### BEGIN INIT INFO -# Provides: led_aging.sh -# Required-Start: $local_fs -# Required-Stop: $local_fs -# Default-Start: 2 3 4 5 -# Default-Stop: 0 1 6 -# Short-Description: Start LED aging -# Description: Starts LED aging (whatever that is) -### END INIT INFO - -x=$(/bin/ps -ef | /bin/grep "[l]ed_acc") -if [ ! -n "$x" -a -x /usr/bin/led_acc ]; then - /usr/bin/led_acc & -fi -</pre> - </p> - Run <b>apt-get update</b> and <b>apt-get upgrade</b> then reboot the BBB, before continuing. - </p> - - <p> - Check that the firmware exists:<br/> - # <b>ls /lib/firmware/BB-SPI0-01-00A0.*</b><br/> - Output: - </p> -<pre> -/lib/firmware/BB-SPI0-01-00A0.dtbo -</pre> - <p> - Then:<br/> - # <b>echo BB-SPI0-01 > /sys/devices/bone_capemgr.*/slots</b><br/> - # <b>cat /sys/devices/bone_capemgr.*/slots</b><br/> - Output: - </p> -<pre> - 0: 54:PF--- - 1: 55:PF--- - 2: 56:PF--- - 3: 57:PF--- - 4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G - 5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI - 7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-SPI0-01 -</pre> - - <p> - Verify that the spidev device now exists:<br/> - # <b>ls -al /dev/spid*</b><br/> - Output: - </p> -<pre> -crw-rw---T 1 root spi 153, 0 Nov 19 21:07 /dev/spidev1.0 -</pre> - <p> - Now the BBB is ready to be used for flashing. Make this persist - across reboots:<br/> - In /etc/default/capemgr add <b>CAPE=BB-SPI0-01</b> at the end - (or change the existing <b>CAPE=</b> entry to say that, if an - entry already exists. - </p> - <p> - Get flashrom from the libreboot_util release archive, or build it from libreboot_src/git if you need to. - An ARM binary (statically compiled) for flashrom exists in libreboot_util releases. Put the flashrom binary - on your BBB. - </p> - <p> - You may also need ich9gen, if you will be flashing an ICH9-M laptop (such as the X200). Get it from libreboot_util, - or build it from libreboot_src, and put the ARM binary for it on your BBB. - </p> - <p> - Finally, get the ROM image that you would like to flash and put that on your BBB. - </p> - - <p> - Now test flashrom:<br/> - # <b>./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512</b><br/> - Output: - </p> -<pre> -Calibrating delay loop... OK. -No EEPROM/flash device found. -Note: flashrom can never write if the flash chip isn't found automatically. -</pre> - - <p> - This means that it's working (the clip isn't connected to any flash chip, - so the error is fine). - </p> - - </div> - - <div class="section" id="clip"> - - <h1> - Connecting the Pomona 5250/5252 - </h1> - <p> - Use this image for reference when connecting the pomona to the BBB: - <a href="http://beagleboard.org/Support/bone101#headers">http://beagleboard.org/Support/bone101#headers</a> - (D0 = MISO or connects to MISO). - </p> - - <p> - The following shows how to connect clip to the BBB (on the P9 header), for SOIC-16 (clip: Pomona 5252): - </p> -<pre> - NC - - 21 - 1 - - 17 - NC - - NC - NC - - NC - NC - - NC - NC - - NC - 18 - - 3.3V (PSU) - 22 - - NC - this is pin 1 on the flash chip -<i>This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack.</i> - -You may also need to connect pins 1 and 9 (tie to 3.3V supply). These are HOLD# and WP#. -On some systems they are held high, if the flash chip is attached to the board. -If you're flashing a chip that isn't connected to a board, you'll almost certainly -have to connect them. - -SOIC16 pinout (more info available online, or in the datasheet for your flash chip): -HOLD 1-16 SCK -VDD 2-15 MOSI -N/C 3-14 N/C -N/C 4-13 N/C -N/C 5-12 N/C -N/C 6-11 N/C -SS 7-10 GND -MISO 8-9 WP -</pre> - <p> - The following shows how to connect clip to the BBB (on the P9 header), for SOIC-8 (clip: Pomona 5250): - </p> -<pre> - 18 - - 1 - 22 - - NC - NC - - 21 - 3.3V (PSU) - - 17 - this is pin 1 on the flash chip -<i>This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack.</i> - -You may also need to connect pins 3 and 7 (tie to 3.3V supply). These are HOLD# and WP#. -On some systems they are held high, if the flash chip is attached to the board. -If you're flashing a chip that isn't connected to a board, you'll almost certainly -have to connect them. - -SOIC8 pinout (more info available online, or in the datasheet for your flash chip): -SS 1-8 VDD -MISO 2-7 HOLD -WP 3-6 SCK -GND 4-5 MOSI -</pre> - <p> - <b>NC = no connection</b> - </p> - <p> - <b><u>DO NOT</u> connect 3.3V (PSU) yet. ONLY connect this once the pomona is connected to the flash chip.</b> - </p> - <p> - <b>You also need to connect the BLACK wire (ground/earth) from the 3.3V PSU to pin 2 on the BBB (P9 header). - It is safe to install this now - (that is, before you connect the pomona to the flash chip); in fact, you should.</b> - </p> - <p> - if you need to extend the 3.3v psu leads, just use the same colour M-F leads, <b>but</b> keep all other - leads short (10cm or less) - </p> - - <p> - You should now have something that looks like this:<br/> - <img src="images/x200/5252_bbb0.jpg" alt="" /> - <img src="images/x200/5252_bbb1.jpg" alt="" /> - </p> - - <p> - <a href="#pagetop">Back to top of page.</a> - </p> - - </div> - - <div class="section"> - - <h1 id="stability">Notes about stability</h1> - - <p> - <a href="http://flashrom.org/ISP">http://flashrom.org/ISP</a> - is what we typically do in libreboot, though not always. That page - has some notes about using resistors to affect stability. Currently, - we use spispeed=512 (512kHz) but it is possible to use higher speeds while - maintaining stability. - </p> - - <p> - tty0_ in #libreboot was able to get better flashing speeds with the following configuration: - </p> - <ul> - <li>"coax" with 0.1 mm core and aluminum foley (from my kitchen), add 100 Ohm resistors (serial)</li> - <li>put heatshrink above the foley, for: CS, CLK, D0, D1</li> - <li>Twisted pair used as core (in case more capacitors are needed)</li> - <li> - See this image: - <a href="http://i.imgur.com/qHGxKpj.jpg">http://i.imgur.com/qHGxKpj.jpg</a> - </li> - <li>He was able to flash at 50MHz (lower speeds are also fine).</li> - </ul> - - </div> - - <div class="section"> - - <p> - Copyright © 2014, 2015 Francis Rowe <info@gluglug.org.uk><br/> - Copyright © 2015 Patrick "P. J." McDermott <pj@pehjota.net><br/> - Permission is granted to copy, distribute and/or modify this document - under the terms of the GNU Free Documentation License, Version 1.3 - or any later version published by the Free Software Foundation; - with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. - A copy of the license can be found at <a href="../gfdl-1.3.txt">../gfdl-1.3.txt</a> - </p> - - <p> - Updated versions of the license (when available) can be found at - <a href="https://www.gnu.org/licenses/licenses.html">https://www.gnu.org/licenses/licenses.html</a> - </p> - - <p> - UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE - EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS - AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF - ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS, - IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION, - WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR - PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS, - ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT - KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT - ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU. - </p> - <p> - TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE - TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION, - NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT, - INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES, - COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR - USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN - ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR - DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR - IN PART, THIS LIMITATION MAY NOT APPLY TO YOU. - </p> - <p> - The disclaimer of warranties and limitation of liability provided - above shall be interpreted in a manner that, to the extent - possible, most closely approximates an absolute disclaimer and - waiver of all liability. - </p> - - </div> - -</body> -</html> |