Messages in this thread | | | From | (Eric W. Biederman) | Subject | Re: [LinuxBIOS] #57: libusb host program for PLX NET20DC debug device | Date | Sun, 03 Dec 2006 16:03:55 -0700 |
| |
Peter Stuge <stuge-linuxbios@cdy.org> writes:
> On Fri, Dec 01, 2006 at 04:02:03PM -0700, Eric W. Biederman wrote: >> >> Sure, I will send it out shortly. I currently have a working >> >> user space libusb thing (easy, but useful for my debug) >> > >> > Hm - for driving which end? >> >> Either. The specific device we are talking about doesn't care. > > Which device do you have?
Well it is built by PLX, and from lsusb I see are: 0525:127a Netchip Technology, Inc.
The hardware is a little rectangular pcb board a little smaller then a business card. Wrapped in a blue case, with vertical vents on both of the long sides, and gets a little warm when you have been running it for a while. The device has what appears to be 2 normal host to slave cables running into it.
The picture at the bottom of: http://advdbg.org/blogs/advdbg_system/articles/64.aspx
Looks like what I have. I'm curious about the whole plug both ends into the host before plugging it into the client, and about the strange target system BIOS requirements.
I think I succeeded in making it work without out that by just putting in a reset. It does make the whole setup of the device a pain though.
>> > The debug port isn't really supposed to be used with anything but >> > a debug device - which can't be enumerated normally anyway. >> >> It depends. If you have a debug cable with magic ends and a >> hardcoded address of 127 the normal enumeration doesn't work. I >> don't think anyone actually makes one of those. > > Only one of the ports on Stefan's PLX NET20DC that I had a look at > during the LinuxBIOS symposium enumerated for me.
Very odd. I'm pretty certain we are talking same thing. But I do know it has a couple of weird quirks, so maybe you just ran up against that.
>> Debug devices are also allowed to be normal devices that just >> support the debug descriptor. Which is what I'm working with. > > Aye. I would be happy if we could get something out, as you have > done! :) Looking forward to trying it, I hope I get my device soon.
Well at least this means after it works I can probably forget about it and let someone else maintain the code ;)
Eric - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |