docs/install/x200_external.html: add photos, improve instructions

1 files changed, 116 insertions, 60 deletions

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)