USB and MPC855T/860T ???

USB and MPC855T/860T ???

[Steven Scholz]

Hi there,

I'd love to put some USB functionality to my custom MPC855T board.

I noticed USB support for USB devices. But which USB controllers are
actually supported? Which controller would be the best?

I guess I'll want to use the MPC as a USB host and as a USB slave - well
not at the same time I suppose.
Is that possible? Or does Linux include support only for USB host
controllers?

TIA!

Cheers,

Steven

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Re: USB and MPC855T/860T ???

[Frederic Soulier]

Dear Steven,

> I'd love to put some USB functionality to my custom MPC855T board.
>
> I noticed USB support for USB devices. But which USB controllers are
> actually supported? Which controller would be the best?

Linux provides now a good USB hosts/devices support. You can have a look at
the Linux USB Project page  : http://www.linux-usb.org/. You have to
consider that your microcontroller doesn't integrate a USB host (if you want
one, you may reconsider your choice and look a the MPC-850 family).

Some mails on this mailing-lists were published about USB host/device. Other
interesting informations should be found through nesgroups like
news://comp.arch.embedded

Feel free to ask me directly if you want more precise informations.

Regards,

Frederic.

---
     Frederic Soulier    -    Aztec Radiomedia  /  Digigram Europe
  31, rue du chemin de fer,  F-67087 Strasbourg Cedex 2, France
   Phone : +33 (0) 3 88 30 80 36  /  Fax : +33 (0) 3 88 30 90 99
                     Web site : http://www.digigram.com


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Re: USB and MPC855T/860T ???

[Steven Scholz]

Dear Frederic,

> Linux provides now a good USB hosts/devices support. You can have a look at
> the Linux USB Project page  : http://www.linux-usb.org/. You have to
> consider that your microcontroller doesn't integrate a USB host (if you want
> one, you may reconsider your choice and look a the MPC-850 family).

Thanks for your reply.
Since we need Fast Ethernet we are kind of restricted to MPC855T/860T.
Using the above URL it's easy to find out about supported devices like
cameras, disks, whatever.
But finding information about supported chipsets is much more difficult.

And when I am talking about chipsets I don't mean PCI chipsets.

I am looking for a simple USB controller from Atmel, Cypress or so
supported by linuxppc!

Is linux/drivers/usb the right place to look for supported chips?

Any ideas?

Thanks.

--
Steven Scholz

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RE: USB and MPC855T/860T ???

[Williams, Kevin M.]

Steven,

Search the linux-usb-devel mailing list at sourceforge for "1161" and you
should find source posted by Roman Weissgaerber for a Philips ISP1161.  It's
the only non-OHCI/UHCI external USB host controller I know of with a Linux
Driver.  Transdimension (and one other company who I can't remember right
now) also make an embedded host controller, but I don't know of a Linux
driver for either.

Hope that helps.

Kevin

-----Original Message-----
From: Steven Scholz [mailto:steven.scholz@imc-berlin.de]
Sent: Friday, October 26, 2001 12:24 PM
To: Frederic Soulier
Cc: LinuxPPC
Subject: Re: USB and MPC855T/860T ???



Dear Frederic,

> Linux provides now a good USB hosts/devices support. You can have a look
at
> the Linux USB Project page  : http://www.linux-usb.org/. You have to
> consider that your microcontroller doesn't integrate a USB host (if you
want
> one, you may reconsider your choice and look a the MPC-850 family).

Thanks for your reply.
Since we need Fast Ethernet we are kind of restricted to MPC855T/860T.
Using the above URL it's easy to find out about supported devices like
cameras, disks, whatever.
But finding information about supported chipsets is much more difficult.

And when I am talking about chipsets I don't mean PCI chipsets.

I am looking for a simple USB controller from Atmel, Cypress or so
supported by linuxppc!

Is linux/drivers/usb the right place to look for supported chips?

Any ideas?

Thanks.

--
Steven Scholz


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Re: USB and MPC855T/860T ???

[Steven Scholz]

"Williams, Kevin M." wrote:

> Search the linux-usb-devel mailing list at sourceforge for "1161" and you
> should find source posted by Roman Weissgaerber for a Philips ISP1161.  It's
> the only non-OHCI/UHCI external USB host controller I know of with a Linux
> Driver.

Thanks.
But why should I use a non-OHCI/UHCI external USB host controller?
Are there huge advantages of this solution?
Or big drawbacks when using a a UHCI chip?

Cheers,
Steven Scholz

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Re: USB and MPC855T/860T ???

[Steven Scholz]

And anyway, what's the big difference between a "host controller" and a
"interface chip"?
I am not talking about Transceiver!

Thanks,


Steven Scholz

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