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Diffstat (limited to 'docs/misc/bbb_ehci.md')
| -rw-r--r-- | docs/misc/bbb_ehci.md | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/docs/misc/bbb_ehci.md b/docs/misc/bbb_ehci.md index f1240d24..6f072154 100644 --- a/docs/misc/bbb_ehci.md +++ b/docs/misc/bbb_ehci.md @@ -21,11 +21,11 @@ EHCI debugging recommended)](#EnebleEHCIDebugonthetargetskerneloptionalrecommended) 7. [References](#References) -**NOTE: this documentation may be outdated, and discusses configuring +*NOTE: this documentation may be outdated, and discusses configuring EHCI debug on the default Debian system that the BBB sometimes comes with. If you want an easier time, just use [BBB ScrewDriver](https://www.coreboot.org/BBB_screwdriver) which comes -pre-configured.** +pre-configured.* If your computer does not boot after installing libreboot, it is very useful to get debug logs from it, from the payload (grub) and/or the @@ -40,17 +40,17 @@ it (TODO: grub). I will refer to three computers: -- **host** - this is the computer you use, have tools, compiler, +- *host* - this is the computer you use, have tools, compiler, Internet, etc -- **BBB** - Beaglebone Black (rev. B or higher, i use rev. C) -- **target** - the computer you are trying to install liberboot +- *BBB* - Beaglebone Black (rev. B or higher, i use rev. C) +- *target* - the computer you are trying to install liberboot ### Find USB port on the target that supports EHCI debug {#FindUSBportonthetargetthatsupportsEHCIdebug} Not all USB controllers support EHCI debug (see: [EHCI Debug Port](http://www.coreboot.org/EHCI_Debug_Port#Hardware_capability) ). Even more, if a USB controller supports EHCI debug, it is available only -**on a single port** that might or might not be exposed externally. +*on a single port* that might or might not be exposed externally. - You need running OS (GNU+Linux) on your target for this step (If you've flashed libreboot and it does not boot, you have to flush @@ -76,8 +76,8 @@ Even more, if a USB controller supports EHCI debug, it is available only support debug (bold). Remember (write down) for each port (external plug) you found that -supports debug: **PCI device id, the bus id, the port number, and the -physical location of the usb plug.** +supports debug: *PCI device id, the bus id, the port number, and the +physical location of the usb plug.* If you do not find a match, you can not get debug over EHCI. Sorry. @@ -235,7 +235,7 @@ Then:\ CONFIG_CONSOLE_USB=y (Console -> USB dongle console output) -Also Debugging \---> Output verbose XYZ ) (**FIXME** somebody verify +Also Debugging \---> Output verbose XYZ ) (*FIXME* somebody verify these): CONFIG_DEBUG_CBFS=y (Output verbose CBFS debug messages ) @@ -247,7 +247,7 @@ these): If some of the above mentioned configuration options are not as specified, you have to configure and compile libreboot yourself. Please -refer to the doc(**FIXME: link** about compiling libreboot. +refer to the doc(*FIXME: link* about compiling libreboot. #### Selecting HCD Index and USB Debug port {#SelectingHCDIndexandUSBDebugport} @@ -342,7 +342,7 @@ Interface](http://cs.usfca.edu/~cruse/cs698s10/) ^21^ https://wiki.ubuntu.com/Kernel/Debugging/USBearlyprintk -**TODO**: +*TODO*: 1. grub does not send messages to EHCI debug. Investigate. 2. The section “Configure libreboot with EHCI debug” can be @@ -353,8 +353,6 @@ Interface](http://cs.usfca.edu/~cruse/cs698s10/) Copyright © 2015 Alex David <opdecirkel@gmail.com>\ - - Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License Version 1.3 or any later version published by the Free Software Foundation |