Hacking PXA270 internal USB HOST

[bigbop]

Hi Lenny -
Welcome to the X51v USB host thread
Yeah, I figure if I can reverse engineer what ever is between the X51 sync connector and the CPU, I can finally determine if this USBOTG driver will work (or not).
As for other implementations for a USB host interface, the SolarExpress unit uses the Cypress Semiconductor USB host chip: ftp://ftp.efo.ru/pub/cypress/usb/CY3...ct%20Brief.pdf

Interesting that it says CE6 and WM 5.3 or later. WM6.1 is still only CE OS 5.2. CE6 is made for other devices. So, does that mean we have to wait till WM7? Seems as what we have now will not work. Next version of WM should be good to go though.

[Dagon]

Hi Big Bob, i don't know if you surrender on this project, but i'm not.

I found this guy who sucessfully got USB HOST capabilities to the treo, and he claims this can work on every PXA27x devices.

Please, check it out, i don't understand it very well, but maybe this can bring light to this dreamed project.

Alex's Handheld Tinkering: USB host mode on the Treo 650


Please, post some answer after that. whatever you want to say, just, say hello if you want, but say something.

Good luk
Dagon

[bigbop]

Hi Big Bob, i don't know if you surrender on this project, but i'm not.

I found this guy who sucessfully got USB HOST capabilities to the treo, and he claims this can work on every PXA27x devices.

Please, check it out, i don't understand it very well, but maybe this can bring light to this dreamed project.

Alex's Handheld Tinkering: USB host mode on the Treo 650


Please, post some answer after that. whatever you want to say, just, say hello if you want, but say something.

Good luk
Dagon

Thanks
The only problem here is that he's running Linux on his Treo and I'm trying to get this working with Windows Mobile.
I think I found a driver to work and I'm sure that the native USB sync interface can be used without any hardware mods.
What Alex discovered was the same thing I figured out last year - the USB client interface share the same lines as the USBOTG interface.
Unfortunately, up to this point, I was unable to dig up any info on how to use the USBOTG interface under Windows Mobile.

If anyone out there has access to a SYMBOL (Motorola) MC50 PDA, if they can get me the WM5 OS USB drivers, that would be a good start.

Thanks for the find. I'll contact Alex to get more info.

[Dagon]

what controllers does this will use, OHCI?

I found the source code for OHCI controller for arm processor, maybe this could be fixed to work with WM5 or WM6, i will give a try in this way, and comment my results.

[bigbop]

For WM6, there is a USBOTG interface driver as well as the device drivers.
For WM2003SE, the X50v A02 ROM had the OHCI driver already included as device #17. That was removed in subsequent ROMs (see my way earlier posts on this) and replaced by the peripheral.dll driver. Peripheral.dll senses pins 5 & 6 on the sync connector. If they are grounded, then pin 7 outputs 3.3v at 100mA max to power an external RS232 level shift circuit.

Also, that driver is most likely for USB Host Port 1 (Not a USBOTG interface), which is not brought out to the sync connector. You need the code for USBOTG.DLL which will be in WM6.5 when it comes out. There are only a few references to it on the web at this point and I found the most pointed reference in a Microsoft blog posting (in a previous post in ths thread).

I've been playing with the Symbol MC50 USBOTG drivers for their WM2003SE release available here: CradlePoint Technology
Read the manual for the device: http://www.efmpro.com/Samples/Owner%...er%20Guide.pdf

There are divers for WM2003 and WM5. The ethernet device looks like a peripheral to the PDA. The MC50 WM5.0 firmware has the drivers already built-in to the ROM so I'd really like to get a copy of that to pull apart.

Look at chapt 12 of this Intel guide: PXA270 Processor Developer's Manual - Oct 2004