remove bbb-specific info on external flash guides
the removed info is a relic, from before all information was centralised in docs/install/spi.md remove it, because it is extremely confusing for new readershslick-master
Leah Rowe
parent
77badd90c4
commit
87993b88a8
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@ -22,7 +22,7 @@ recommend avoiding Kingston modules.*
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Flashing instructions can be found at
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[../install/\#flashrom](../install/#flashrom) - note that external
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flashing is required (e.g. BBB), if the proprietary (ASUS) firmware is
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flashing is required, if the proprietary (ASUS) firmware is
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currently installed. If you already have libreboot, by default it is
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possible to re-flash using software running in GNU+Linux on the
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KGPE-D16, without using external hardware.
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@ -20,7 +20,9 @@ libreboot currently documents how to use these SPI programmers:
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* BeagleBone Black (BBB)
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Many other SPI programmers exist. More of them will be documented on this page,
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at a date in the future.
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at a date in the future. You can otherwise figure it out on your own; certain
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parts of this page are still useful, even if you're using a programmer that
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Libreboot does not yet document.
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Most systems in libreboot have to be re-flashed externally, using instructions
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on this and similar guides, the first time you flash. However, on all currently
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@ -1,5 +1,5 @@
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---
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title: Flashing the T500 with a BeagleBone Black
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title: ThinkPad T500 external flashing
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x-toc-enable: true
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...
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@ -75,44 +75,11 @@ MAC address {#macaddress}
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Refer to [mac\_address.md](../hardware/mac_address.md).
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Initial BBB configuration
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=========================
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Clip wiring
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===========
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Refer to [spi.md](spi.md) as a guide for external re-flashing.
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The following shows how to connect clip to the BBB (on the P9 header),
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for SOIC-16 (clip: Pomona 5252):
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```
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POMONA 5252 (correlate with the BBB guide)
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=== ethernet jack and VGA port ====
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NC - - 21
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1 - - 17
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NC - - NC
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NC - - NC
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NC - - NC
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NC - - NC
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18 - - 3.3V (PSU)
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22 - - NC - this is pin 1 on the flash chip
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=== SATA port ===
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This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack.
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```
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The following shows how to connect clip to the BBB (on the P9 header),
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for SOIC-8 (clip: Pomona 5250):
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```
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POMONA 5250 (correlate with the BBB guide)
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=== RAM slots ====
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18 - - 1
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22 - - NC
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NC - - 21
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3.3V (PSU) - - 17 - this is pin 1 on the flash chip
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=== slot where the AC jack is connected ===
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```
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This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack.
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The procedure
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-------------
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@ -214,91 +181,7 @@ Connect your programmer, then connect GND and 3.3V\
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A dedicated 3.3V PSU was used to create this guide, but at ATX PSU is
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also fine:\
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Of course, make sure to turn on your PSU:\
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Now, you should be ready to install libreboot.
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Log in as root on your BBB, using the instructions in
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[bbb\_setup.html\#bbb\_access](bbb_setup.html#bbb_access).
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Test that flashrom works:
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./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512
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In this case, the output was:
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```
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flashrom v0.9.7-r1854 on Linux 3.8.13-bone47 (armv7l)
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flashrom is free software, get the source code at http://www.flashrom.org
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Calibrating delay loop... OK.
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Found Macronix flash chip "MX25L6405(D)" (8192 kB, SPI) on linux_spi.
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Found Macronix flash chip "MX25L6406E/MX25L6436E" (8192 kB, SPI) on linux_spi.
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Found Macronix flash chip "MX25L6445E/MX25L6473E" (8192 kB, SPI) on linux_spi.
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Multiple flash chip definitions match the detected chip(s): "MX25L6405(D)", "MX25L6406E/MX25L6436E", "MX25L6445E/MX25L6473E"
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Please specify which chip definition to use with the -c <chipname> option.
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```
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How to backup factory.rom (change the -c option as neeed, for your flash
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chip):
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```
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./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -r factory.rom
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./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -r factory1.rom
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./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -r factory2.rom
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```
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Note: the `-c` option is not required in libreboot's patched
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flashrom, because the redundant flash chip definitions in *flashchips.c*
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have been removed.\
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Now compare the 3 images:
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sha512sum factory\*.rom
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If the hashes match, then just copy one of them (the factory.rom) to a
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safe place (on a drive connected to another system, not the BBB). This
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is useful for reverse engineering work, if there is a desirable
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behaviour in the original firmware that could be replicated in coreboot
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and libreboot.
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While there is a default MAC address inside the gbe region of flash image,
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it is not one you want to use. Make sure to change the MAC address to the one
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that is correct for your system, for **later internal flash**,
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but always remember to **flash unmodfied txtmode image first** as it is known
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to work and only this variant provides memtest. You can follow instructions
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at [ich9utils.md#ich9gen](ich9utils.md#ich9gen)
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to change the MAC address inside the libreboot image.
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Now flash it:
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./flashrom -p linux_spi:dev=/dev/spidev1.0,spispeed=512 -w path/to/libreboot/rom/image.rom -V
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You might see errors, but if it says `Verifying flash... VERIFIED` at
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the end, then it's flashed and should boot. If you see errors, try
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again (and again, and again); the message `Chip content is identical to
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the requested image` is also an indication of a successful
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installation.
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Example output from running the command (see above):
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```
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flashrom v0.9.7-r1854 on Linux 3.8.13-bone47 (armv7l)
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flashrom is free software, get the source code at http://www.flashrom.org
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Calibrating delay loop... OK.
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Found Macronix flash chip "MX25L6405(D)" (8192 kB, SPI) on linux_spi.
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Reading old flash chip contents... done.
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Erasing and writing flash chip... FAILED at 0x00001000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x0000ffff: 0xd716
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ERASE FAILED!
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Reading current flash chip contents... done. Looking for another erase function.
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Erase/write done.
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Verifying flash... VERIFIED.
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```
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Now flash Libreboot.
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Thermal paste (IMPORTANT)
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=========================
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@ -139,23 +139,8 @@ This will provide adequate 3.3v DC at correct current levels. The SPI flash on a
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X60 shares a common 3.3V rail with many other components on the mainboard,
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which all draw a lot of current, more than your programmer can provide.
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Example RPi command:
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sudo ./flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=4096 -w libreboot.rom -V
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If flashrom complains about multiple flash chips detected, just pass the `-c`
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option as it suggests, and pick any of the chips it lists. `spispeed=4096` or
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lower (e.g. `spispeed=512`) is recommended on this board. The flashing becomes
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unstable, on this machine, when you use higher speeds.
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Reverse the steps to re-assemble your system, after you've flashed the chip.
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It should be `Verifying flash... VERIFIED` at the end. If flashrom
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complains about multiple flash chip definitions detected, then choose
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one of them following the instructions in the output.
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Remove the programmer and put it away somewhere. Put back the tape and
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press firmly over it:\
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When you're finished flashing, remove the programmer and put it away somewhere.
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Put back the tape and press firmly over it:\
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Your empty chassis:\
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@ -119,13 +119,4 @@ This will provide adequate 3.3v DC at correct current levels. The SPI flash on a
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X60 Tablet shares a common 3.3V rail with many other components on the mainboard,
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which all draw a lot of current, more than most flashers can provide.
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Example command:
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sudo ./flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=4096 -w libreboot.rom -V
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If flashrom complains about multiple flash chips detected, just pass the `-c`
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option as it suggests, and pick any of the chips it lists. `spispeed=4096` or
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lower (e.g. `spispeed=512`) is recommended on this board. The flashing becomes
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unstable, on this machine, when you use higher speeds.
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Reverse the steps to re-assemble your system, after you've flashed the chip.
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