[coreboot] EHCI debug port finder

Joseph Smith joe at settoplinux.org
Tue Sep 9 03:48:36 CEST 2008

On Tue, 09 Sep 2008 03:31:00 +0200, Carl-Daniel Hailfinger
<c-d.hailfinger.devel.2006 at gmx.net> wrote:
> I wanted to know which physical port of my multiple USB controllers have
> the debug capability. There was no way to find that easily, so I created
> a tool which will do most of the work for the user.
> Example output:
> The following PCI devices support a USB debug port (says lspci):
> 0000:00:1d.7
> The following PCI devices support a USB debug port (says the kernel):
> 0000:00:1d.7
> PCI device 0000:00:1d.7, USB bus 3, USB physical port 1
> Currently connected high-speed devices:
> /:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/6p, 480M
>     |__ Port 2: Dev 20, If 0, Class=stor., Driver=usb-storage, 480M
> The output can be improved, but it's a good start.
Doesn't lspci -vvv tell you? It does for me on the ICH4

00:1d.7 USB Controller: Intel Corp. 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI
Controller (rev 02) (prog-if 20 [EHCI])
	Subsystem: Unknown device bc8a:4610
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
	Latency: 0
	Interrupt: pin D routed to IRQ 11
	Region 0: Memory at feb7fc00 (32-bit, non-prefetchable) [size=1K]
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [58] Debug port

Joseph Smith

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