Firmware Support for USB Hub

Firmware Support for USB Hub

[Misbah khan]

Hi all,

I am using a 8248 processor which has a USB controller and i need to connect
a USB Hub to it, iam using Montavista Linux .I need to know that what are
the support i need form Montavista or Open source to have an interface with
Usb hub. ???

Is there any driver that we need to make if so what type ???

--misbah <><
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Re: Firmware Support for USB Hub

[Scott Wood]

Misbah khan wrote:
> Hi all,
> 
> I am using a 8248 processor which has a USB controller and i need to connect
> a USB Hub to it, iam using Montavista Linux .I need to know that what are
> the support i need form Montavista or Open source to have an interface with
> Usb hub. ???
> 
> Is there any driver that we need to make if so what type ???

I don't believe a driver currently exists for CPM USB.

-Scott

Re: Firmware Support for USB Hub

[Laurent Pinchart]

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On Wednesday 21 November 2007 18:20, Scott Wood wrote:
> Misbah khan wrote:
> > Hi all,
> >
> > I am using a 8248 processor which has a USB controller and i need to
> > connect a USB Hub to it, iam using Montavista Linux .I need to know that
> > what are the support i need form Montavista or Open source to have an
> > interface with Usb hub. ???
> >
> > Is there any driver that we need to make if so what type ???
>
> I don't believe a driver currently exists for CPM USB.

There's an experimental out-of-tree driver available at 
http://cpm2usb.sourceforge.net/

The code is outdated and doesn't work, but that's a starting point.

If I remember correctly, CPM2 USB host support requires the host to create SOF 
packets in software. High system loads will probably mess the bus up. A 
colleague of mines was told by Freescale to use an external USB controller 
instead of the MPC8248 bundled one.

-- 
Laurent Pinchart
CSE Semaphore Belgium

Chaussée de Bruxelles, 732A
B-1410 Waterloo
Belgium

T +32 (2) 387 42 59
F +32 (2) 387 42 75

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Re: Firmware Support for USB Hub

[Misbah khan]

Laurent Pinchart-4 wrote:
>=20
> On Wednesday 21 November 2007 18:20, Scott Wood wrote:
>> Misbah khan wrote:
>> > Hi all,
>> >
>> > I am using a 8248 processor which has a USB controller and i need to
>> > connect a USB Hub to it, iam using Montavista Linux .I need to know
>> that
>> > what are the support i need form Montavista or Open source to have an
>> > interface with Usb hub. ???
>> >
>> > Is there any driver that we need to make if so what type ???
>>
>> I don't believe a driver currently exists for CPM USB.
>=20
> There's an experimental out-of-tree driver available at=20
> http://cpm2usb.sourceforge.net/
>=20
> The code is outdated and doesn't work, but that's a starting point.
>=20
> can you suggest me the problems both in terms of H/W S/W and Montavista
> ????
>=20
> If I remember correctly, CPM2 USB host support requires the host to creat=
e
> SOF=20
> packets in software. High system loads will probably mess the bus up. A=
=20
> colleague of mines was told by Freescale to use an external USB controlle=
r=20
> instead of the MPC8248 bundled one.
>=20
> I have posted this quarry to freescale. Anyway if you get more informatio=
n
> could you please share with me ??
>=20
>=20
> ---Misbah <><
> --=20
> Laurent Pinchart
> CSE Semaphore Belgium
>=20
> Chauss=C3=A9e de Bruxelles, 732A
> B-1410 Waterloo
> Belgium
>=20
> T +32 (2) 387 42 59
> F +32 (2) 387 42 75
>=20
> =20
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>=20

--=20
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Re: Firmware Support for USB Hub

[Clemens Koller]

Misbah khan schrieb:
 > Laurent Pinchart-4 wrote:
 >> On Wednesday 21 November 2007 18:20, Scott Wood wrote:
 >>
 >> If I remember correctly, CPM2 USB host support requires the host to create
 >> SOF
 >> packets in software. High system loads will probably mess the bus up. A
 >> colleague of mines was told by Freescale to use an external USB controller
 >> instead of the MPC8248 bundled one.
 >>
 >> I have posted this quarry to freescale. Anyway if you get more information
 >> could you please share with me ??

Well... can you post the source of this information. I would expect having
effects like this documented in the user manual or if it's really erratic
behaviour (and not a mess in an unmaintained piece of software) in an errata
sheet.

Please update.

Regards,

Clemens Koller
__________________________________
R&D Imaging Devices
Anagramm GmbH
Rupert-Mayer-Straße 45/1
Linhof Werksgelände
D-81379 München
Tel.089-741518-50
Fax 089-741518-19
http://www.anagramm-technology.com

Re: Firmware Support for USB Hub

[Misbah khan]

Thank you for your reply.

Even i think that there is only out-of-tree driver for CPM USB. i would like
to know that some body used this driver and what is the problem that could
come and how could we customize for our requirement for the PPC-8248. 

Could you tell me what is the reason for not using inbuilt USB controler for
8248 than going for External controller.

If any body has already done USB driver than could you please share your
experience.

----misbah <><





Scott Wood-2 wrote:
> 
> Misbah khan wrote:
>> Hi all,
>> 
>> I am using a 8248 processor which has a USB controller and i need to
>> connect
>> a USB Hub to it, iam using Montavista Linux .I need to know that what are
>> the support i need form Montavista or Open source to have an interface
>> with
>> Usb hub. ???
>> 
>> Is there any driver that we need to make if so what type ???
> 
> I don't believe a driver currently exists for CPM USB.
> 
> -Scott
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> 
> 

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Re: Firmware Support for USB Hub

[Misbah khan]

This is the reply that i got from the Freescale :-

--------------------------------------------------------------------------
Reply from Freescale 
In reply to your Service Request SR 1-403672820:

We recommend using the MPC8272 USB controller.
We know that customers use the MPC8272/MPC8248 USB controller.
You can find also USB drivers in Linux software for the MPC8272.
For example Linux BSP for Freescale MPC8272ADS contains USB slave 
driver 
(http://www.freescale.com/webapp/sps/site/overview.jsp?nodeId=0127260061033202A5).

Linux USB driver is available in the Arabella Linux 
(http://www.arabellasw.com/products-pow2.php).

If the MPC8272 is USB host, the transaction-level interface can be used.

Note: The MPC8272 USB does not support high-speed mode. It can 
operate on low-speed mode (1.5MHz) or full-speed mode (12MHz).

------------------------------------------------------------------------------------------

Can any body comment on this and help me how to start with and requirement
is this :-

I need a USB Hub to be connected to the PPC8248 board with Montavista Linux
2.6.10 
on it what shall i do to achive it ....????The challenges you already know 

Hoping for the the Help ...




Misbah khan wrote:
> 
> Hi all,
> 
> I am using a 8248 processor which has a USB controller and i need to
> connect a USB Hub to it, iam using Montavista Linux .I need to know that
> what are the support i need form Montavista or Open source to have an
> interface with Usb hub. ???
> 
> Is there any driver that we need to make if so what type ???
> 
> --misbah <><
> 

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Re: Firmware Support for USB Hub

[Laurent Pinchart]

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On Friday 23 November 2007 09:45, Misbah khan wrote:
> This is the reply that i got from the Freescale :-
>
> --------------------------------------------------------------------------
> Reply from Freescale
> In reply to your Service Request SR 1-403672820:
>
> We recommend using the MPC8272 USB controller.
> We know that customers use the MPC8272/MPC8248 USB controller.
> You can find also USB drivers in Linux software for the MPC8272.
> For example Linux BSP for Freescale MPC8272ADS contains USB slave
> driver
> (http://www.freescale.com/webapp/sps/site/overview.jsp?nodeId=0127260061033
>202A5).
>
> Linux USB driver is available in the Arabella Linux
> (http://www.arabellasw.com/products-pow2.php).
>
> If the MPC8272 is USB host, the transaction-level interface can be used.
>
> Note: The MPC8272 USB does not support high-speed mode. It can
> operate on low-speed mode (1.5MHz) or full-speed mode (12MHz).
>
> ---------------------------------------------------------------------------
>
> Can any body comment on this and help me how to start with and requirement
> is this :-
>
> I need a USB Hub to be connected to the PPC8248 board with Montavista Linux
> 2.6.10 on it what shall i do to achive it ....????The challenges you already
> know 

You need a USB host driver for the CPM2 controller. There are several 
solutions:

- Start with the driver available at http://cpm2usb.sourceforge.net/ and port 
it for your kernel.
- Ask Montavista support for a CPM2 USB host driver (they will most likely 
charge for that).
- Buy the Arabella kernel and port the driver to the Montavista kernel (ask 
the Arabella support to make sure their USB host driver supports what you 
need, and pay attention to possible license issues).

In the end, it boils down to writing code yourself or paying someone to do the 
job.

Best regards,

Laurent Pinchart

-- 
Laurent Pinchart
CSE Semaphore Belgium

Chaussée de Bruxelles, 732A
B-1410 Waterloo
Belgium

T +32 (2) 387 42 59
F +32 (2) 387 42 75

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