Anyone using QE UART mode?

Anyone using QE UART mode?

[Ying Lin]

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How to enable TTY devices using QUICC Engine UCC UART Mode?

Are Linux kernel patches enough to enable them?  Or, additional
programming required?

 

The kernel has QE patches, and I am able to use QE Ethernet.  Also, I
can choose the QE slow UART mode in kernel configurations.  But, can not
see TTY devices from QE.

 

Thanks,

Ying

 


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Re: Anyone using QE UART mode?

[Timur Tabi]

Ying Lin wrote:
> How to enable TTY devices using QUICC Engine UCC UART Mode?
> 
> Are Linux kernel patches enough to enable them?  Or, additional 
> programming required?

I'm working on a device driver for QE UART mode, but it's not working yet.  The QE UART is 
like the CPM UART, but I'm having troubel getting it to work.

It is *not* trivial, or even easy, to enabled.  It's a full-blown UART driver that also 
deals with the complexity of the QE.

-- 
Timur Tabi
Linux Kernel Developer @ Freescale

RE: Anyone using QE UART mode?

[Ying Lin]

OK, the missing piece (UART driver) I am looking for is not available
yet.  I will seek alternative solutions (create a simple UART driver, or
just wait).
Thanks for the information.=20
Ying=20

-----Original Message-----
From: Timur Tabi [mailto:timur@freescale.com]=20
Sent: Monday, July 02, 2007 11:40 AM
To: Ying Lin
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Anyone using QE UART mode?

Ying Lin wrote:
> How to enable TTY devices using QUICC Engine UCC UART Mode?
>=20
> Are Linux kernel patches enough to enable them?  Or, additional=20
> programming required?

I'm working on a device driver for QE UART mode, but it's not working
yet.  The QE UART is=20
like the CPM UART, but I'm having troubel getting it to work.

It is *not* trivial, or even easy, to enabled.  It's a full-blown UART
driver that also=20
deals with the complexity of the QE.

--=20
Timur Tabi
Linux Kernel Developer @ Freescale

RE: Anyone using QE UART mode?

[Li Yang-r58472]

> -----Original Message-----
> From: linuxppc-embedded-bounces+leoli=3Dfreescale.com@ozlabs.org
> [mailto:linuxppc-embedded-bounces+leoli=3Dfreescale.com@ozlabs.org] On
Behalf
> Of Ying Lin
> Sent: Tuesday, July 03, 2007 12:02 AM
> To: Tabi Timur-B04825
> Cc: linuxppc-embedded@ozlabs.org
> Subject: RE: Anyone using QE UART mode?
>=20
> OK, the missing piece (UART driver) I am looking for is not available
> yet.  I will seek alternative solutions (create a simple UART driver,
or
> just wait).

Which chip are you using?  There should be separate 16550 compatible
UART controller on MPC8360.  The driver is already there and working
pretty well.

- Leo

RE: Anyone using QE UART mode?

[Ying Lin]

> Which chip are you using?  There should be separate 16550 compatible
> UART controller on MPC8360.  The driver is already there and working
> pretty well.

We are using MPC8323E.  We have 2 working serial ports from the DUART
controller, but we need more than 2.

We have about 4 weeks to make them working, any suggestion where to
start?  We plan to start with CW QE Utility generated codes.

Thanks,
Ying

Re: Anyone using QE UART mode?

[Timur Tabi]

Ying Lin wrote:
> 
>> Which chip are you using?  There should be separate 16550 compatible
>> UART controller on MPC8360.  The driver is already there and working
>> pretty well.
> 
> We are using MPC8323E.  We have 2 working serial ports from the DUART
> controller, but we need more than 2.
> 
> We have about 4 weeks to make them working, any suggestion where to
> start?  We plan to start with CW QE Utility generated codes.

Have you tried using a PCI UART card?

-- 
Timur Tabi
Linux Kernel Developer @ Freescale

RE: Anyone using QE UART mode?

[Ying Lin]

> Have you tried using a PCI UART card?

No, the hardware is fixed to use UCC4/5.