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

Originally Posted by lennysh

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]

Originally Posted by 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

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

[xpytonx]

Hi

Look in google:

"phyCORE-XScale-PXA270-Accel"

If this post don't help please delete.

[Antineutrino]

Have a look also at ZENO USB Drivers here...

Zeno USB Host Drivers v6.0a - xda-developers

[bigbop]

Originally Posted by Antineutrino

Have a look also at ZENO USB Drivers here...

Zeno USB Host Drivers v6.0a - xda-developers

Thanks, but unfortunately, these drivers are based on the RATOC interface, which uses a chip from Cypress Semiconductor.
We need a host driver for the built-in USB interface of the PXA270 uP.
This may be available come the WM7 release - if it can even be ported to the Axim.

[jwy2k2]

Any progress on this? There's some new 6.5 roms (claimed to be) out there for other devices. Wondering if they might have the necessary drivers?

[Antineutrino]

Originally Posted by bigbop

Thanks, but unfortunately, these drivers are based on the RATOC interface, which uses a chip from Cypress Semiconductor.
We need a host driver for the built-in USB interface of the PXA270 uP.
This may be available come the WM7 release - if it can even be ported to the Axim.

Perhaps I have what you need...
Let me see...

Have a look of what I posted here...

Suggestion: Windows CE BSP... - HTCGeeks Forum

[bigbop]

Originally Posted by Antineutrino

Perhaps I have what you need...
Let me see...

Have a look of what I posted here...

Suggestion: Windows CE BSP... - HTCGeeks Forum

Unfortunately, the site you're ultimately referring to (not HTC Geeks) 'charges' too much for me, being a hardware person. Too bad - lots of good info.

However, with that said, why don't you have a go at this. Essentially, what we're looking for is the USBOTG driver that we can port to the X51 series under WM5 or WM6.
The Client USB interface uses the USBOTG hardware interface already. The new driver would need to disable the client interface and take over that particular port. It should be doable.

[ricirici]

I spent all day to read this discussion, very nice and a lot of work, very nice job..
I thought to do the same a lot time ago, but I'm too lazy. I have posted somethink to x50v.it .. anyway..
If I understand well, the problem now is to find/write driver for pxahostusb.. There are some products like toshida g900 or some asus with already built-in these feature.. may be you are already think to use it or to look it .. It's just suggest..
Great job..

[bigbop]

Originally Posted by ricirici

I spent all day to read this discussion, very nice and a lot of work, very nice job..
I thought to do the same a lot time ago, but I'm too lazy. I have posted somethink to x50v.it .. anyway..
If I understand well, the problem now is to find/write driver for pxahostusb.. There are some products like toshida g900 or some asus with already built-in these feature.. may be you are already think to use it or to look it .. It's just suggest..
Great job..

Thanks for the suggestions but I've already looked at a number of other PDAs with built-in USB host interfaces. All have used ASICs or 3rd party chips for the interface.
There are 3 host interfaces on the PXA270:
Host port 1 is not connected but IS terminated on the motherboard through two 1.5K resistors to ground. That was my first attempt to connect those to the outside world.
Host port 3 is a single-ended port, also not connected.
Host port 2 uses the USBOTG interface in the client mode. I suspect if someone vould write or obtain an OTG driver for this port, we can get ot working as client and host.

That is where this project sits right now.

[ricirici]

Sorry but I don't understand why do you want use port 2 instead of 1?
Port1 is the host, isn't it??
About the OTG I know, but I'll not stake one's life on it, that is a kind of standar that is used to have a "computerless" communication between usb devices..
Did you try to built some circuit and connect to port 1, and see what's happen..?




Ciao

[bigbop]

Originally Posted by ricirici

Sorry but I don't understand why do you want use port 2 instead of 1?
Port1 is the host, isn't it??
About the OTG I know, but I'll not stake one's life on it, that is a kind of standar that is used to have a "computerless" communication between usb devices..
Did you try to built some circuit and connect to port 1, and see what's happen..?
Ciao

USB Port 1 is not brought out to the real world - only port 2 which is the OTG hardcoded to work only as a client interface.
Please download and read the PXA270 hardware specs - it's all detailed there.