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a/docs/install/r400_external.html +++ b/docs/install/r400_external.html @@ -84,10 +84,34 @@

+ +
+ +

MAC address

-
+

+ On the R400, the MAC address for the onboard + gigabit ethernet chipset is stored inside the flash chip, + along with other configuration data. +

+

+ 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: +

+ +

+ + + +

+ +
+ +
-

Initial BBB setup

+

Initial BBB configuration

Refer to bbb_setup.html for how to @@ -124,29 +148,186 @@ POMONA 5250 (correlate with the BBB guide) === slot where the AC jack is connected === -

- Connect Pomona 5252/5250 to the R400 flash chip, and dump/flash -

+

Disassembly

+ +

+ Remove all screws:
+
+ Remove the HDD and optical drive:
+
+ Remove the hinge screws:
+ + +

+ +

+ Remove the palm rest and keyboard:
+ + +

+ +

+ Remove these screws, and then remove the bezel:
+ + +

+ +

+ Remove the speaker screws, but don't remove the speakers yet + (just set them loose):
+ + + +

+ +

+ Remove these screws, and then remove the metal plate:
+ + + +

+ +

+ Remove the antennas from the wifi card, and then + start unrouting them:
+ + + + + + +

+ +

+ Disconnect the LCD cable from the motherboard:
+ + + + +

+ +

+ Remove the hinge screws, and then remove the LCD panel:
+ + + + +

+ +

+ Remove this:
+ + +

+ +

+ Remove this long cable (there are 3 connections):
+ + + + +

+ +

+ Disconnect the speaker cable, and remove the speakers:
+ +

+ +

+ Remove the heatsink screws, remove the fan + and then remove the heatsink/fan:
+ + + + +

+ +

+ Remove the NVRAM battery:
+ + +

+

- The following photo shows an R400 flashed using the BBB:
- + Remove this screw:
+ +

+ +

+ Disconnect the AC jack:
+ + +

+ +

+ Remove this screw and then remove what is under it:
+ +

+ +

+ Remove this:
+ +

+ +

+ Lift the motherboard (which is still inside the cage) + from the side on the right, removing it completely:
+ + +

+

- No disassembly instructions yet, unfortunately. Check videos online or - look at the Hardware Maintenance Manual from Lenovo for this machine. - You will need to completely disassemble the machine, removing the motherboard - from its metal shell. - 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. + Remove all screws, marking each hole so that you know + where to re-insert them. You should place the screws in + a layout corresponding to the order that they were in + before removal: + +

+ +

+ Remove the motherboard from the cage, and the SPI flash + chip will be next to the memory slots:
+ + +

+ +

+ Connect your programmer, then connect GND and 3.3V
+ + + + + + +

+

+ A dedicated 3.3V PSU was used to create this guide, but + at ATX PSU is also fine:
+ +

+ +

+ Of course, make sure to turn on your PSU:
+ +

+ +

+ Now, you should be ready to install libreboot. +

+

Flashrom binaries for ARM (tested on a BBB) are distributed in libreboot_util. Alternatively, libreboot also distributes flashrom source code which can be built.

- I did (SSH'd into the BBB):
+ Log in as root on your BBB, using the instructions in bbb_setup.html#bbb_access. +

+

+ Test that flashrom works:
# ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512
- In my case, the output was: + In this case, the output was: 

 flashrom v0.9.7-r1854 on Linux 3.8.13-bone47 (armv7l)
@@ -158,47 +339,39 @@ Found Macronix flash chip "MX25L6445E/MX25L6473E" (8192 kB, SPI) on li
 Multiple flash chip definitions match the detected chip(s): "MX25L6405(D)", "MX25L6406E/MX25L6436E", "MX25L6445E/MX25L6473E"
 Please specify which chip definition to use with the -c <chipname> option.
-

- 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):
- # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -c "MX25L6405(D)" -

-

- 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. These - are not blobs, they only contain non-functional data (configuration details, fully readable) which is fully documented in public datasheets. - The descriptor will need to be modified - to disable the ME (also disable AMT) so that you can flash a ROM that excludes it. -

How to backup factory.rom (change the -c option as neeed, for your flash chip):
- # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -c "MX25L6405(D)" -r factory.rom
- # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -c "MX25L6405(D)" -r factory1.rom
- # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -c "MX25L6405(D)" -r factory2.rom
+ # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -r factory.rom
+ # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -r factory1.rom
+ # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -r factory2.rom
+ Note: the -c option is not required in libreboot's patched flashrom, because + the redundant flash chip definitions in flashchips.c have been removed.
Now compare the 3 images:
# sha512sum factory*.rom
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. +

+

+ Follow the instructions at ../hcl/gm45_remove_me.html#ich9gen + 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. Make sure + to always change the MAC address to one that is correct for your system.

- Information about the descriptor, gbe regions and how the ME was removed can be found in the notes linked at - ../hcl/gm45_remove_me.html. Libreboot ROM images now include - the 12KiB descriptor+gbe by default, generated using ich9gen; - however, do note that the MAC address in the Gbe region is generic. Follow the instructions at - ../hcl/gm45_remove_me.html#ich9gen and do what it says to change the MAC address - inside your R400 ROM image, before flashing it. + Now flash it:
+ # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -w path/to/libreboot/rom/image.rom -V

- 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 libreboot.rom) for example I had to do:
- # ./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -c "MX25L6405(D)" -w libreboot.rom +

You might see errors, but if it says Verifying flash... VERIFIED at the end, then it's flashed and should boot. - Test it! (boot your R400) + If you see errors, try again (and again, and again); the message Chip content is identical to the requested image + is also an indication of a successful installation.

- My output when running the command above: + Example output from running the command (see above): 

 flashrom v0.9.7-r1854 on Linux 3.8.13-bone47 (armv7l)
@@ -212,6 +385,7 @@ Reading current flash chip contents... done. Looking for another erase function.
 Erase/write done.
 Verifying flash... VERIFIED.
+

Back to top of page. @@ -244,14 +418,14 @@ Verifying flash... VERIFIED.

Wifi

- The T400 typically comes with an Intel wifi chipset, which does not + The R400 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 ../hcl/index.html#recommended_wifi.

- Some T400 laptops might come with an Atheros chipset, but this is 802.11g only. + Some R400 laptops might come with an Atheros chipset, but this is 802.11g only.

@@ -263,7 +437,7 @@ Verifying flash... VERIFIED.

The following photos show an Atheros AR5B95 being installed, to - replace the Intel chip that this T400 came with:
+ replace the Intel chip that this R400 came with:

@@ -286,6 +460,25 @@ Verifying flash... VERIFIED.

+ +
+ +

+ Boot it! +

+

+ You should see something like this: +

+

+ + +

+ +

+ Now install GNU/Linux. +

+ +
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