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<head>
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	<meta name="viewport" content="width=device-width, initial-scale=1">

	<style type="text/css">
		@import url('../css/main.css');
	</style>

	<title>ThinkPad T400: flashing tutorial (BeagleBone Black)</title>
</head>

<body>

	<div class="section">
		<h1 id="pagetop">Flashing the T400 with a BeagleBone Black</h1>
		
			<p>Initial flashing instructions for T400.</p>
			<p>
				This guide is for those who want libreboot on their ThinkPad T400
				while they still have the original Lenovo BIOS present. This guide
				can also be followed (adapted) if you brick your T400, to know how
				to recover.
			</p>

			<p><a href="index.html">Back to main index</a></p>
	</div>

	<div class="section">

		<h1 id="preinstall">T400 laptops with libreboot pre-installed</h1>

			<p>
				If you don't want to install libreboot yourself, companies exist that sell these laptops
				with libreboot pre-installed, along with a free GNU/Linux distribution.
			</p>
			<p>
				Check the <a href="../../suppliers">suppliers</a> page for more information.
			</p>

	</div>
	
	<div class="section">
	
		<h2 id="serial_port">Serial port</h2>
		
			<p>
				EHCI debug might not be needed. It has been reported that the docking station
				for this laptop has a serial port, so it might be possible to use that instead.
			</p>
	
	</div>

	<div class="section">

		<h1 id="lcd_compatibility">LCD compatibly</h1>
			<p>
				Not all LCD panels are compatible yet. See <a href="../hcl/gm45_lcd.html">../hcl/gm45_lcd.html</a>.
			</p>

	</div>
	
	<div class="section" id="cpu_compatibility">
	
		<h1>A note about CPUs</h1>
			<p>
				<a href="http://www.thinkwiki.org/wiki/Category:T400">ThinkWiki</a> has a list of CPUs
				for this system. The Core 2 Duo P8400, P8600 and P8700 are believed to work in libreboot.
				The T9600 was confirmed to work, so the T9500/T9550 probably also work.
			</p>
			
			<h2>Quad-core CPUs</h2>
			
				<p>
					Incompatible. Do not use.
				</p>
	
	</div>
	
	<div class="section" id="switchable_graphics">
	
		<h1>A note about GPUs</h1>
		
			<p>
				Some models have an Intel GPU, while others have both an ATI and an Intel GPU; this
				is referred to as &quot;switchable graphics&quot;. In the <i>BIOS setup</i> program
				for lenovobios, you can specify that the system will use one or the other (but not both).
			</p>
			
			<p>
				Libreboot is known to work on systems with only the Intel GPU, using native graphics initialization.
				On systems with switchable graphics, the Intel GPU is used and the ATI GPU is disabled, so
				native graphics initialization works all the same.
			</p>
			
		<h1>CPU paste required</h1>
			
			<p>
				See <a href="#paste">#paste</a>.
			</p>
	
	</div>

	<div class="section">

		<h1 id="flashchips">Flash chip size</h1>
		
			<p>
				Use this to find out:<br>
				# <b>dmidecode | grep ROM\ Size</b>
			</p>
		
			<p>
				<a href="#pagetop">Back to top of page.</a>
			</p>
			
	</div>
	
	<div class="section photos">
	
		<h1 id="macaddress">MAC address</h1>
		
			<p>
				On the T400, 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/t400/macaddress0.jpg" alt="" />
				<img src="images/t400/macaddress1.jpg" alt="" />
				<img src="images/x200/disassembly/0001.jpg" alt="" />
			</p>
	
	</div>
		
	<div class="section photos">

		<h1>Initial BBB configuration</h1>
		
			<p>
				Refer to <a href="bbb_setup.html">bbb_setup.html</a> for how to
				configure 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):
			</p>
<pre>
POMONA 5252 (correlate with the BBB guide)
===  ethernet jack and VGA port ====
 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
===  SATA port ===
<i>This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack.</i><br/>
<img src="images/t400/0065.jpg" alt="" />
</pre>
			<p>
				The following shows how to connect clip to the BBB	(on the P9 header), for SOIC-8 (clip: Pomona 5250):
			</p>
<pre>
POMONA 5250 (correlate with the BBB guide)
===  RAM slots ====
 18              -       - 1
 22              -       - NC
 NC              -       - 21
 3.3V (PSU)      -       - 17 - this is pin 1 on the flash chip
===  slot where the AC jack is connected ===<br/>
<i>This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack.</i><br/>
<img src="images/t500/0060.jpg" alt="" />
</pre>
	
			<h2>
				The procedure
			</h2>
					
				<p>
					Remove <i>all</i> screws, placing them in the order that you removed them:<br/>
					<img src="images/t400/0001.jpg" alt="" />
					<img src="images/t400/0002.jpg" alt="" />
				</p>
				<p>
					Remove those three screws then remove the rear bezel:<br/>
					<img src="images/t400/0003.jpg" alt="" />
					<img src="images/t400/0004.jpg" alt="" />
					<img src="images/t400/0005.jpg" alt="" />
					<img src="images/t400/0006.jpg" alt="" />
				</p>
				<p>
					Remove the speakers:<br/>
					<img src="images/t400/0007.jpg" alt="" />
					<img src="images/t400/0008.jpg" alt="" />
					<img src="images/t400/0009.jpg" alt="" />
					<img src="images/t400/0010.jpg" alt="" />
					<img src="images/t400/0011.jpg" alt="" />
				</p>
				<p>
					Remove the wifi:<br/>
					<img src="images/t400/0012.jpg" alt="" />
					<img src="images/t400/0013.jpg" alt="" />
				</p>
				<p>
					Remove this cable:<br/>
					<img src="images/t400/0014.jpg" alt="" />
					<img src="images/t400/0015.jpg" alt="" />
					<img src="images/t400/0016.jpg" alt="" />
					<img src="images/t400/0017.jpg" alt="" />
					<img src="images/t400/0018.jpg" alt="" />
				</p>
				<p>
					Unroute those antenna wires:<br/>
					<img src="images/t400/0019.jpg" alt="" />
					<img src="images/t400/0020.jpg" alt="" />
					<img src="images/t400/0021.jpg" alt="" />
					<img src="images/t400/0022.jpg" alt="" />
					<img src="images/t400/0023.jpg" alt="" />
				</p>
				<p>
					Remove the LCD assembly:<br/>
					<img src="images/t400/0024.jpg" alt="" />
					<img src="images/t400/0025.jpg" alt="" />
					<img src="images/t400/0026.jpg" alt="" />
					<img src="images/t400/0027.jpg" alt="" />
					<img src="images/t400/0028.jpg" alt="" />
					<img src="images/t400/0029.jpg" alt="" />
					<img src="images/t400/0030.jpg" alt="" />
					<img src="images/t400/0031.jpg" alt="" />
				</p>
				<p>
					Disconnect the NVRAM battery:<br/>
					<img src="images/t400/0033.jpg" alt="" />
				</p>
				<p>
					Disconnect the fan:<br/>
					<img src="images/t400/0034.jpg" alt="" />
				</p>
				<p>
					Unscrew these:<br/>
					<img src="images/t400/0035.jpg" alt="" />
					<img src="images/t400/0036.jpg" alt="" />
					<img src="images/t400/0037.jpg" alt="" />
					<img src="images/t400/0038.jpg" alt="" />
				</p>
				<p>
					Unscrew the heatsink, then lift it off:<br/>
					<img src="images/t400/0039.jpg" alt="" />
					<img src="images/t400/0040.jpg" alt="" />
				</p>
				<p>
					Disconnect the power jack:<br/>
					<img src="images/t400/0041.jpg" alt="" />
					<img src="images/t400/0042.jpg" alt="" />
				</p>
				<p>
					Loosen this:<br/>
					<img src="images/t400/0043.jpg" alt="" />
				</p>
				<p>
					Remove this:<br/>
					<img src="images/t400/0044.jpg" alt="" />
					<img src="images/t400/0045.jpg" alt="" />
					<img src="images/t400/0046.jpg" alt="" />
					<img src="images/t400/0047.jpg" alt="" />
					<img src="images/t400/0048.jpg" alt="" />
				</p>
				<p>
					Unscrew these:<br/>
					<img src="images/t400/0049.jpg" alt="" />
					<img src="images/t400/0050.jpg" alt="" />
				</p>
				<p>
					Remove this:<br/>
					<img src="images/t400/0051.jpg" alt="" />
					<img src="images/t400/0052.jpg" alt="" />
				</p>
				<p>
					Unscrew this:<br/>
					<img src="images/t400/0053.jpg" alt="" />
				</p>
				<p>
					Remove the motherboard (the cage is still attached) from
					the right hand side, then lift it out:<br/>
					<img src="images/t400/0054.jpg" alt="" />
					<img src="images/t400/0055.jpg" alt="" />
					<img src="images/t400/0056.jpg" alt="" />
				</p>
				<p>
					Remove these screws, placing the screws in the same layout
					and marking each screw hole (so that you know what ones
					to put the screws back into later):
					<img src="images/t400/0057.jpg" alt="" />
					<img src="images/t400/0058.jpg" alt="" />
					<img src="images/t400/0059.jpg" alt="" />
					<img src="images/t400/0060.jpg" alt="" />
					<img src="images/t400/0061.jpg" alt="" />
					<img src="images/t400/0062.jpg" alt="" />
				</p>
				<p>
					Separate the motherboard:<br/>
					<img src="images/t400/0063.jpg" alt="" />
					<img src="images/t400/0064.jpg" alt="" />
				</p>
				<p>
					Connect your programmer, then connect GND and 3.3V<br/>
					<img src="images/t400/0065.jpg" alt="" />
					<img src="images/t400/0066.jpg" alt="" />
					<img src="images/t400/0067.jpg" alt="" />
					<img src="images/t400/0069.jpg" alt="" />
					<img src="images/t400/0070.jpg" alt="" />
					<img src="images/t400/0071.jpg" alt="" />
				</p>
				<p>
					A dedicated 3.3V PSU was used to create this guide, but
					at ATX PSU is also fine:<br/>
					<img src="images/t400/0072.jpg" alt="" />
				</p>
				
				<p>
					Of course, make sure to turn on your PSU:<br/>
					<img src="images/x200/disassembly/0013.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>
					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 this case, the output was:
				</p>
<pre>
flashrom v0.9.7-r1854 on Linux 3.8.13-bone47 (armv7l)
flashrom is free software, get the source code at http://www.flashrom.org
Calibrating delay loop... OK.
Found Macronix flash chip &quot;MX25L6405(D)&quot; (8192 kB, SPI) on linux_spi.
Found Macronix flash chip &quot;MX25L6406E/MX25L6436E&quot; (8192 kB, SPI) on linux_spi.
Found Macronix flash chip &quot;MX25L6445E/MX25L6473E&quot; (8192 kB, SPI) on linux_spi.
Multiple flash chip definitions match the detected chip(s): &quot;MX25L6405(D)&quot;, &quot;MX25L6406E/MX25L6436E&quot;, &quot;MX25L6445E/MX25L6473E&quot;
Please specify which chip definition to use with the -c &lt;chipname&gt; option.
</pre>
				<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 -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 system, not
					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>
					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>
					<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.
					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>
					Example output from running the command (see above):
				</p>
<pre>
flashrom v0.9.7-r1854 on Linux 3.8.13-bone47 (armv7l)
flashrom is free software, get the source code at http://www.flashrom.org
Calibrating delay loop... OK.
Found Macronix flash chip &quot;MX25L6405(D)&quot; (8192 kB, SPI) on linux_spi.
Reading old flash chip contents... done.
Erasing and writing flash chip... FAILED at 0x00001000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x0000ffff: 0xd716
ERASE FAILED!
Reading current flash chip contents... done. Looking for another erase function.
Erase/write done.
Verifying flash... VERIFIED.
</pre>

			<p>
				<a href="#pagetop">Back to top of page.</a>
			</p>
	
	</div>
	
	<div class="section photos" id="paste">
	
		<h1>Thermal paste (IMPORTANT)</h1>
	
			<p>
				Because part of this procedure involved removing the heatsink, you will need to apply new paste.
				Arctic MX-4 is ok. You will also need isopropyl alcohol and an anti-static cloth to clean with.
			</p>
			
			<p>
				When re-installing the heatsink, you must first clean off all old paste with the alcohol/cloth.
				Then apply new paste. Arctic MX-4 is also much better than the default paste used on these systems.
			</p>
			
			<p>
				<img src="images/t400/paste.jpg" alt="" />
			</p>
			
			<p>
				NOTE: the photo above is for illustration purposes only, and does not show how to properly apply the thermal paste.
				Other guides online detail the proper application procedure.
			</p>
	
	</div>
	
	<div class="section">
	
		<h1 id="wifi">Wifi</h1>
		
			<p>
				The T400 typically comes with an Intel wifi chipset, which does not
				work without proprietary software. For a list of wifi chipsets that
				work without proprietary software, see
				<a href="../hcl/index.html#recommended_wifi">../hcl/index.html#recommended_wifi</a>.
			</p>
			
			<p>
				Some T400 laptops might come with an Atheros chipset, but this is 802.11g only.
			</p>
			
			<p>
				It is recommended that you install a new wifi chipset. This can only
				be done after installing libreboot, because the original firmware has
				a whitelist of approved chips, and it will refuse to boot if you
				use an 'unauthorized' wifi card.
			</p>
			
			<p>
				The following photos show an Atheros AR5B95 being installed, to
				replace the Intel chip that this T400 came with:<br/>
				<img src="images/t400/0012.jpg" alt="" />
				<img src="images/t400/ar5b95.jpg" alt="" />
			</p>
	
	</div>
	
	<div class="section">
	
		<h1 id="wwan">WWAN</h1>
			<p>
				If you have a WWAN/3G card and/or sim card reader, remove them permanently. 
				The WWAN-3G card has proprietary firmware inside; the technology is
				identical to what is used in mobile phones, so it can also track your movements.
			</p>
			<p>
				Not to be confused with wifi (wifi is fine).
			</p>
	
	</div>
	
	<div class="section photos">
	
		<h1 id="memory">Memory</h1>
		
			<p>
				You need DDR3 SODIMM PC3-8500 RAM installed, in matching pairs
				(speed/size). Non-matching pairs won't work. You can also install a
				single module (meaning, one of the slots will be empty) in slot 0.
			</p>
			
			<p>
				Make sure that the RAM you buy is the 2Rx8 density.
			</p>

			<p>
				<a href="http://www.forum.thinkpads.com/viewtopic.php?p=760721">This page</a> might be useful for RAM compatibility info
				(note: coreboot raminit is different, so this page might be BS)
			</p>
			
			<p>
				The following photo shows 8GiB (2x4GiB) of RAM installed:<br/>
				<img src="images/t400/memory.jpg" alt="" />
			</p>
	
	</div>
	
	<div class="section photos">
	
			<h2>
				Boot it!
			</h2>
			<p>
				You should see something like this:
			</p>
			<p>
				<img src="images/t400/boot0.jpg" alt="" />
				<img src="images/t400/boot1.jpg" alt="" />
			</p>
			
			<p>
				Now <a href="../gnulinux/index.html">install GNU/Linux</a>.
			</p>
	
	</div>

	<div class="section">

		<p>
			Copyright &copy;  2015 Leah Rowe &lt;info@minifree.org&gt;<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
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			KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT
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		<p>
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			above shall be interpreted in a manner that, to the extent
			possible, most closely approximates an absolute disclaimer and
			waiver of all liability.
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