EHCI Gadget Debug
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Documentation is now handled by the same processes we use for code: Add something to the Documentation/ directory in the coreboot repo, and it will be rendered to https://doc.coreboot.org/. Contributions welcome!
This page is about using embedded GNU/Linux devices in order to get the USB debug logs.
- You need to be familiar with (cross) compiling your kernel.
- (Cross) compile it as usual but during the configuration do the following:
Go into Device Drivers:
Device Drivers --->
Then go into USB support:
[*] USB support --->
Then go into USB Gadget Support:
<M> USB Gadget Support --->
Then enable the following option:
<M> EHCI Debug Device Gadget
Then select the printk option for now(a bug has to be fixed to make serial option work properly):
EHCI Debug Device mode (printk) --->
Remove all usb gadget drivers such as g_ehter or g_mass_storage with rmmod then do:
Finding the USB debug port
|Brand and Device||kernel used||Target devices||works?|
|Goldelico GTA04 A3||neil-plus kernel and branch (3.7)||Lenovo X60||Yes|
|Buglabs's bug 2.0||[github.com/GNUtoo/bug20-2.6.35-linaro/commits/master bug20-2.6.35-linaro + some commits on top (2.6.35) ]||Lenovo X60||Yes|