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| -rw-r--r-- | docs/install/bbb_setup.html | 28 |
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diff --git a/docs/install/bbb_setup.html b/docs/install/bbb_setup.html index 6b9a647..dfd8d90 100644 --- a/docs/install/bbb_setup.html +++ b/docs/install/bbb_setup.html @@ -327,6 +327,34 @@ Note: flashrom can never write if the flash chip isn't found automatically. </p> </div> + + <div class="section"> + + <h1>EHCI debugging</h1> + + <p> + Some libreboot systems lack serial ports, so you have to use the debug port (USB) instead. + The BeagleBone can be configured for this. It may involve compiling a patched kernel. + </p> + + <p> + Work is in progress to implement this, and document it in libreboot. These are just some preliminary notes. + </p> + + <p> + <a href="www.coreboot.org/EHCI_Debug_Port">www.coreboot.org/EHCI_Debug_Port</a> + <a href="www.coreboot.org/EHCI_Gadget_Debug">www.coreboot.org/EHCI_Gadget_Debug</a> + </p> + +<pre> +from #coreboot +<tty0_> stefanct, 1) plug the the BBB to a running system first and make sure you see it as "Netchip" (with lsusb). if that is correct (i.e you have BBB > ver1 ) , you have to rebuild coreboot/libreboot with Net20DB instead of BBB as debug dongle +<stefanct> tty0_: the coreboot config is clear to me... it fails to show up in lsusb already +<tty0_> on BBB, unload all the modules, then modprobe g_dbgp +<tty0_> ... and when i siad lsusb, you do that on the target system, not on BBB +</pre> + + </div> <div class="section"> |