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authorFrancis Rowe <info@gluglug.org.uk>2015-03-14 09:01:33 (EDT)
committer Francis Rowe <info@gluglug.org.uk>2015-03-14 09:01:33 (EDT)
commit66e7e1780cf52433f0e06dec68487a682b113b3d (patch)
tree32e29a04eea07b96e1a21f76703d792037ca1ef6 /docs
parentaed6817eedf635008d82065ae20ee05dc908c2fb (diff)
downloadlibreboot-66e7e1780cf52433f0e06dec68487a682b113b3d.zip
libreboot-66e7e1780cf52433f0e06dec68487a682b113b3d.tar.gz
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docs/install/x200_external.html: add photos, improve instructions
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17 files changed, 121 insertions, 60 deletions
diff --git a/docs/install/bbb_setup.html b/docs/install/bbb_setup.html
index c263718..8aee971 100644
--- a/docs/install/bbb_setup.html
+++ b/docs/install/bbb_setup.html
@@ -38,6 +38,11 @@
<a href="http://beagleboard.org/black">This page</a> contains a list of distributors.
</li>
<li>
+ Electrical 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.
+ </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
diff --git a/docs/install/images/x200/disassembly/0001.jpg b/docs/install/images/x200/disassembly/0001.jpg
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diff --git a/docs/install/images/x200/disassembly/0014.jpg b/docs/install/images/x200/disassembly/0014.jpg
new file mode 100644
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diff --git a/docs/install/images/x200/disassembly/0015.jpg b/docs/install/images/x200/disassembly/0015.jpg
new file mode 100644
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diff --git a/docs/install/x200_external.html b/docs/install/x200_external.html
index b3de46b..c424966 100644
--- a/docs/install/x200_external.html
+++ b/docs/install/x200_external.html
@@ -22,17 +22,6 @@
can also be followed (adapted) if you brick your X200, to know how
to recover.
</p>
- <p>
- The X200S is also briefly covered (image showing soldering joints, wired up
- to a BBB). Note, not all X200S or X200 Tablet configurations are supported yet
- (see <a href="../hcl/x200.html#x200s">../hcl/x200.html#x200s</a></b>
- </p>
- <p>
- Before following this section, please make sure to setup your libreboot ROM properly first.
- Although ROM images are provided pre-built in libreboot, there are some modifications that
- you need to make to the one you chose before flashing. (instructions referenced later in
- this guide)
- </p>
<p><a href="index.html">Back to main index</a></p>
</div>
@@ -40,14 +29,17 @@
<div class="section">
<h1 id="flashchips">Flash chips</h1>
-
+
<p>
- There are two possible flash chip sizes for the X200: 4MiB
- (32Mbit) or 8MiB (64Mbit). This can be identified by the type
- of flash chip below the palmrest: 4MiB is SOIC-8 (8 pins), 8MiB
- is SOIC-16 (16 pins). The X200S uses a WSON package and has the same
- pinout as SOIC-8 (covered briefly later on in this guide) but
- the chip is on the underside of the board (disassembly required).
+ The X200 will use an 8MiB or 64Mb SOIC-16 chip (rare models
+ will use a 4MiB or 32Mb SOIC-8 chip), below the palm rest.
+ </p>
+
+ <p>
+ The X200S and X200 Tablet will use a WSON-8 flash chip, on the
+ bottom of the motherboard (this requires removal of the
+ motherboard). <b>Not all X200S/X200T are supported;
+ see <a href="../hcl/x200.html#x200s">../hcl/x200.html#x200s</a>.</b>
</p>
<p>
@@ -55,18 +47,41 @@
</p>
</div>
+
+ <div class="section">
+
+ <h1 id="macaddress">MAC address</h1>
+
+ <p>
+ On the X200/X200S/X200T, the MAC address for the onboard
+ gigabit ethernet chipset is stored inside the flash chip,
+ along with other configuration data.
+ </p>
+ <p>
+ Keep a note of the MAC address before disassembly; this is
+ very important, because you will need to insert this into
+ the libreboot ROM image before flashing it.
+ It will be written in one of these locations:
+ </p>
+
+ <p>
+ <img src="images/x200/disassembly/0002.jpg" alt="" />
+ <img src="images/x200/disassembly/0001.jpg" alt="" />
+ </p>
+
+ </div>
<div class="section">
- <h1>Initial BBB setup</h1>
+ <h1 id="clip">Initial BBB configuration</h1>
<p>
Refer to <a href="bbb_setup.html">bbb_setup.html</a> for how to
- setup the BBB for flashing.
+ set up the BBB for flashing.
</p>
<p>
- The following shows how to connect clip to the BBB (on the P9 header), for SOIC-16 (clip: Pomona 5252):
+ The following shows how to connect the clip to the BBB (on the P9 header), for SOIC-16 (clip: Pomona 5252):
</p>
<pre>
POMONA 5252 (correlate with the BBB guide)
@@ -81,9 +96,11 @@ POMONA 5252 (correlate with the BBB guide)
22 - - NC - this is pin 1 on the flash chip
=== back (palmrest) on your X200 ===
<i>This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack.</i>
+Here is a photo of the SOIC-16 flash chip. Pins are labelled:<br/>
+<img src="images/x200/x200_pomona.jpg" alt="" />
</pre>
<p>
- The following shows how to connect clip to the BBB (on the P9 header), for SOIC-8 (clip: Pomona 5250):
+ The following shows how to connect the clip to the BBB (on the P9 header), for SOIC-8 (clip: Pomona 5250):
</p>
<pre>
POMONA 5250 (correlate with the BBB guide)
@@ -94,7 +111,7 @@ POMONA 5250 (correlate with the BBB guide)
3.3V PSU RED - - 17 - this is pin 1 on the flash chip. in front of it is the screen.
=== right side of the X200 (where the audio jacks are) ===
<i>This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack.</i>
-Here is a photo of the SOIC-8 flash chip:<br/>
+Here is a photo of the SOIC-8 flash chip. The pins are labelled:<br/>
<img title="Copyright 2015 Patrick &quot;P. J.&quot; McDermott &lt;pj@pehjota.net&gt;, CC BY-SA 3.0 or later" src="images/x200/soic8.jpg" alt="freenode IRC #libreboot 01:42 UK/London timezone February 8th 2015: pehjota: fchmmr: Here are two photos in the camera's configured resolution; resize them as you wish: http://www.pehjota.net/~pj/x200/soic-8/. License: CC BY-SA 3.0 or later. If you want other angles or anything, let me know." alt="" />
Look at the pads in that photo, on the left and right. Those are for SOIC-16. Would it be possible to remove the SOIC-8 and solder a SOIC-16
@@ -115,27 +132,74 @@ chip on those pins?
</p>
<h2>
- Connect Pomona 5252/5250 to the X200 flash chip, and dump/flash
+ The procedure
</h2>
<p>
- The following photo shows an X200 flashed using the BBB:<br/>
- <img src="images/x200/x200_pomona.jpg" alt="" />
+ This section is for the X200. This does not apply to the X200S or X200 Tablet
+ (for those machines, you have to remove the motherboard completely, since
+ the flash chip is on the other side of the board).
+ </p>
+ <p>
+ Remove these screws:<br/>
+ <img src="images/x200/disassembly/0003.jpg" alt="" />
+ </p>
+ <p>
+ Push the keyboard forward, gently, then lift it off and
+ disconnect it from the board:<br/>
+ <img src="images/x200/disassembly/0004.jpg" alt="" />
+ <img src="images/x200/disassembly/0005.jpg" alt="" />
+ </p>
+ <p>
+ Pull the palm rest off, lifting from the left and right side at the back of the
+ palm rest:<br/>
+ <img src="images/x200/disassembly/0006.jpg" alt="" />
+ </p>
+ <p>
+ Lift back the tape that covers a part of the flash chip, and
+ then connect the clip:<br/>
+ <img src="images/x200/disassembly/0007.jpg" alt="" />
+ <img src="images/x200/disassembly/0008.jpg" alt="" />
+ </p>
+ <p>
+ On pin 2 of the BBB, where you have the ground (GND), connect the
+ ground to your PSU:<br/>
+ <img src="images/x200/disassembly/0009.jpg" alt="" />
+ <img src="images/x200/disassembly/0010.jpg" alt="" />
+ </p>
+ <p>
+ Connect the 3.3V supply from your PSU to the flash chip (via
+ the clip):<br/>
+ <img src="images/x200/disassembly/0011.jpg" alt="" />
+ <img src="images/x200/disassembly/0012.jpg" alt="" />
+ </p>
+ <p>
+ Of course, make sure that your PSU is also plugged in and
+ turn on:<br/>
+ <img src="images/x200/disassembly/0013.jpg" alt="" />
</p>
<p>
- Remove the battery from your X200, then remove all the screws on
- the bottom (underside) of the machine. Then remove the keyboard and palmrest.
- The flash chip is below the palm rest. Lift back the tape that goes over it,
- and then connect your 5252/5250 (make sure to get it the right way round).
- Then connect the 3.3v PSU wire (red one) and make sure that everything else is connected.
+ This tutorial tells you to use an ATX PSU, for the 3.3V DC
+ supply. The PSU used when taking these photos is actually
+ not an ATX PSU, but a PSU that is designed specifically
+ for providing 3.3V DC (an ATX PSU will also work):<br/>
+ <img src="images/x200/disassembly/0014.jpg" alt="" />
+ </p>
+ <p>
+ Now, you should be ready to install libreboot.
</p>
<p>
Flashrom binaries for ARM (tested on a BBB) are distributed in libreboot_util. Alternatively,
libreboot also distributes flashrom source code which can be built.
</p>
<p>
- I did (SSH'd into the BBB):<br/>
+ Log in as root on your BBB, using the instructions in
+ <a href="bbb_setup.html#bbb_access">bbb_setup.html#bbb_access</a>.
+ </p>
+
+ <p>
+ Test that flashrom works:<br/>
# <b>./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512</b><br/>
- In my case, the output was:
+ In this case, the output was:
</p>
<pre>
flashrom v0.9.7-r1854 on Linux 3.8.13-bone47 (armv7l)
@@ -148,46 +212,38 @@ Multiple flash chip definitions match the detected chip(s): &quot;MX25L6405(D)&q
Please specify which chip definition to use with the -c &lt;chipname&gt; option.
</pre>
<p>
- This is just to test that it's working. In my case, I had to define which chip to use, like so (in your case
- it may be different, depending on what flash chip you have):<br/>
- # <b>./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -c &quot;MX25L6405(D)&quot;</b>
- </p>
- <p>
- At this point, you need to create a copy of the original lenovo firmware that is currently flashed.
- This is so that you can extract the gbe (gigabit ethernet) and flash descriptor regions for use in libreboot. <b>These
- are not blobs, they only contain non-functional data (configuration details, fully readable) which is fully documented in public datasheets.</b>
- The descriptor will need to be modified
- to disable the ME (also disable AMT) so that you can flash a ROM that excludes it.
- </p>
- <p>
How to backup factory.rom (change the -c option as neeed, for your flash chip):<br/>
- # <b>./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -c &quot;MX25L6405(D)&quot; -r factory.rom</b><br/>
- # <b>./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -c &quot;MX25L6405(D)&quot; -r factory1.rom</b><br/>
- # <b>./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -c &quot;MX25L6405(D)&quot; -r factory2.rom</b><br/>
+ # <b>./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -r factory.rom</b><br/>
+ # <b>./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -r factory1.rom</b><br/>
+ # <b>./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -r factory2.rom</b><br/>
+ Note: the <b>-c</b> option is not required in libreboot's patched flashrom, because
+ the redundant flash chip definitions in <i>flashchips.c</i> have been removed.<br/>
Now compare the 3 images:<br/>
# <b>sha512sum factory*.rom</b><br/>
If the hashes match, then just copy one of them (the factory.rom) to a safe place (on a drive connected to another machine, not
- the BBB). You will need it later for part of the deblobbing.
+ the BBB). This is useful for reverse engineering work, if there is a desirable behaviour in the original firmware
+ that could be replicated in coreboot and libreboot.
+ </p>
+ <p>
+ Follow the instructions at <a href="../hcl/gm45_remove_me.html#ich9gen">../hcl/gm45_remove_me.html#ich9gen</a>
+ to change the MAC address inside the libreboot ROM image, before flashing it.
+ Although there is a default MAC address inside the ROM image, this is not what you want. <b>Make sure
+ to always change the MAC address to one that is correct for your system.</b>
</p>
<p>
- Information about the descriptor, gbe regions and how the ME was removed can be found in the notes linked at
- <a href="../hcl/gm45_remove_me.html">../hcl/gm45_remove_me.html</a>. Libreboot ROM images now include
- the 12KiB descriptor+gbe by default, generated using ich9gen;
- <b>however, do note that the MAC address in the Gbe region is generic. Follow the instructions at
- <a href="../hcl/gm45_remove_me.html#ich9gen">../hcl/gm45_remove_me.html#ich9gen</a> and do what it says to change the MAC address
- inside your X200 ROM image, before flashing it.</b>
+ Now flash it:<br/>
+ # <b>./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -w path/to/libreboot/rom/image.rom -V</b>
</p>
<p>
- Assuming that your libreboot ROM image is properly setup (modified descriptor plus gbe region included in the ROM),
- then you can flash (assuming that the filename is <b>libreboot.rom</b>) for example I had to do:<br/>
- # <b>./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -c &quot;MX25L6405(D)&quot; -w libreboot.rom</b>
+ <img src="images/x200/disassembly/0015.jpg" alt="" />
</p>
<p>
You might see errors, but if it says <b>Verifying flash... VERIFIED</b> at the end, then it's flashed and should boot.
- Test it! (boot your X200)
+ If you see errors, try again (and again, and again); the message <b>Chip content is identical to the requested image</b>
+ is also an indication of a successful installation.
</p>
<p>
- My output when running the command above:
+ Example output from running the command (see above):
</p>
<pre>
flashrom v0.9.7-r1854 on Linux 3.8.13-bone47 (armv7l)