Hacking PXA270 internal USB HOST

[kriketronic]

I found this page that enable usb host on eten m600 device.
The link is Enabling USB-host on Eten M600/G500/M500 (WM5)

The files don't exist, but typing in google M600_G500_USB_Host_Installer_118.zip I found this page in another language:

Óñòàíàâëèâàåì USB HOST íà Ì600/Ì600+

The problem is:
1- WM2005
2- Samsung processor (but have all the dlls and registries to enable usb host, only need to fing arm compiled files).

[dx51v]

Kriketronic, how about show us in detail how to repair the audio jack in x51V.

[kriketronic]

I wrote a post five minutes ago and it's desapears.

I found somthing helpfull for this proyect (I think).

There is a PDA "ETEN 600" that has usb host support but wm5 do not have the drivers to get it work.
There are a cab file with all files and registry files to put working usb host on eten 600. Maybe it works or put on the road the drivers problems for this proyect.

The webpage is:

Enabling USB-host on Eten M600/G500/M500 (WM5)

But files don't exist, so I put on goole "M600_G500_USB_Host_Installer_118.zip"
and I found this page that has the file.

Óñòàíàâëèâàåì USB HOST íà Ì600/Ì600+



PD: dx51v this is my blog about jack audio.
Inside Axim x50v: reparación del jack de audio de la Axim x50v
it's in spanish, look at photos. In next day I'm going to write a post in english.

[afarre]

Here you have all doc I collected about it:
HACK_USB_HOST_doc.zip

If someone can add a fixed mirror link I will add it to first post.

[kriketronic]

thanks afarre.
I'm going to read it at night.

If someone has the hardware hacks and wm5 installed can test the cab from eten 600?

[bigbop]

thanks afarre.
I'm going to read it at night.

If someone has the hardware hacks and wm5 installed can test the cab from eten 600?

Unfortunately, it's not that simple. The PXA270 CPU chip (it's actually an SoC - System on a Chip) has several USB interfaces. It has 1 client and 3 host interfaces and there is no guarantee these are at the same I/O addresses as the ETEN devices.

After about 6 months of not touching this project, I decided to take another quickie look at the PXA270 docs and programmers reference. What I now see is very interesting.

Originally, I was looking at bringing out the USB Host 1 interface pins to the outside world as they were only terminated internally on the motherboard. Only about 1% of users might be able to do that.
I then started to look at the USB OTG (On The Go) interface that this chip supports. The USB OTG interface can be used as both a client and host. It shares the same pins as the Axim's serial port. Unfortuately, there are two serial control lines pins that are not brought out to the connector, so I scrubbed that idea.

This past weekend I picked up the programmer's design reference book to look at how the various USB interfaces are programmed and I saw something that I missed before as this was in the USB Client section. It appears (to me anyways) that the USB Client pins can also be programmed to act as a USB Host when in the USB OTG low power operation mode. The manual discusses how the additional control registers are used along with an output mux and charge-pump circuit (to provide the +5v). Refer to the PXA27x Processor Family Developer's Manual - dated Jan 2006, sections 12.5.2 and 20.

I will be looking at this more closely to see if a simple driver can be written (Afarre, where are you...) to switch the USB client pins into Host mode. In addition to this, the USB device drivers would be needed. Please remember, an additional IO interface circuit will be needed to connect between any USB device and the Axim as the proper voltages are not on the sync connector.

[afarre]

Hi Bigbop,
So you are going to give it one more try :throwcomp

Well, I do not use to write programs for ppc and writing a driver use to be an advanced task for any OS. But tell me what you need and give as much information as possible and I will see what I can do.

About USB driver it could happen that driver that cames with Ratoc could work.
I do not think so because it is a driver to put to work a USB host at CF slot.
Similar situation we have for driver that cames with Solar Express.
If none of those options work then we will need to take the driver form some other PDA.
Could it happen the driver originally cames with WM and it has been removed by Dell?
I say that becase in that case maybe WM5 A17 ROM or WM6 could have it.

[makuu]

About USB driver it could happen that driver that cames with Ratoc could work.
I do not think so because it is a driver to put to work a USB host at CF slot.

I think this is not correct, I had an e800 with native USB host. However it would not natively detect a usb drive if directly connected to it. After installing the Ratoc driver, the e800 is then able to detect the usb drive and use it's files.

[afarre]

I think this is not correct, I had an e800 with native USB host. However it would not natively detect a usb drive if directly connected to it. After installing the Ratoc driver, the e800 is then able to detect the usb drive and use it's files.

That sounds great, then It could also be enough for us just using Ratoc driver.

[bigbop]

I think this is not correct, I had an e800 with native USB host. However it would not natively detect a usb drive if directly connected to it. After installing the Ratoc driver, the e800 is then able to detect the usb drive and use it's files.

There is a difference between the USB interface driver (like ohci.dll) and the USB device drivers (like usbd.dll). The interface driver is the one that actually drives the USB interface from a very low level perspective. The USB device drivers are the ones that go between the interface driver and the applications and do the work of interfacing the various USB peripherals connected to the interface, to the rest of the OS.

At this point, the original WM2003SE A02 ROM had the USB host interface driver. That driver was removed in A03 and higher ROMs and replaced with the peripheral driver, which does the sensing of pins 5 & 6 on the sync connector.

I'm looking at the specs for the ETen processor (Samsung) and the Xscale (Intel) and the USB host interfaces seem to be the same. I need to see if the Samsung chip supports USB OTG using a similar setup as the Xscale chip. With that said, I also need to determine what interface the ETen uses for its USB Host interface - is it the client pins or separate USB Host pins?

I need to find out if it's possible to use the Client USB level translating interface with the Host function.

-Bump-

Wow this is quite a project. I was just doing some research on the PXA270 to see if I can add USB host to my HTC Universal and I came across this. Good work everyone. I hope to see this project end in success.

[bigbop]

-Bump-

Wow this is quite a project. I was just doing some research on the PXA270 to see if I can add USB host to my HTC Universal and I came across this. Good work everyone. I hope to see this project end in success.

Hmmm - funny you should BUMP this thread at this time - I was just thinking of doing the same yesterday after doing some more research on my earlier findings above.

It appears that the USB Client pins are multiplexed with USB Host Port 2 :exc: (from what I can descern from the various PXA270 manuals). It also appears that 6 of the USB status sensing pins are muxed with the serial port pins.

Now before you all start jumping for joy, I need to determine what's between those pins on the actual CPU chip and the edge connector of the Axim. If it's simple buffering, then a re-write of a few drivers as well as a simple interface cable is all that might be needed in order to give the X50/X51 series that elusive USB Host interface.

Of course, the big item here is the re-write of the drivers. Essentially, the USB OTG Host interface is actually controlled by the USB Client port control registers. That is why I missed it a while back - I was concentrating on the USB Host interface registers and hardware for USB Host Port 1. No internal hardware mods would be needed by using USB Host Port 2.

The original client driver would need to be rewritten to allow sensing of the USB Vbus voltage through one of the serial pins, which means the serial interface driver needs to be rewritten as well. I will be looking at the drivers from the Asus 730W PDA as it uses a PXA270 and has a USB Host interface. I need to find out how its host interface has been implemented. I was also looking at the new HTC Advantage which is, in effect, what everyone here wanted in a 'new' Axim. Only the price is waaaay too high (at this time) - but it has a USB host interface and it was designed by HTC who designed the Axim, so who knows......

Enough talk - I need to get back to playing with my toys

[Vrokolos]

-bump #2- any news?

[bigbop]

-bump #2- any news?

I'm trying to get the USB drivers from the Colibri Xscale development board. They've created drivers to drive the client and USB host 2 interface, which both share the client USB pins.

[Antineutrino]

Go ahead bigbop...:approve::approve::approve:
You are the man!!!:)