From 2f03af6210f00ebfb60f5e9fa80fb7bcf17bebfa Mon Sep 17 00:00:00 2001 From: Francis Rowe Date: Sat, 04 Apr 2015 14:11:37 -0400 Subject: docs/install/bbb_setup.html: preliminary notes about EHCI debug --- (limited to 'docs/install') 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.

+ +
+ +

EHCI debugging

+ +

+ 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. +

+ +

+ Work is in progress to implement this, and document it in libreboot. These are just some preliminary notes. +

+ +

+ www.coreboot.org/EHCI_Debug_Port + www.coreboot.org/EHCI_Gadget_Debug +

+ +
+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
+
+ +
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