Re: 64MB on OMAP1510/5910?

Re: 64MB on OMAP1510/5910?

[Ralph Walden]

> -----Original Message-----
> From: Ladislav Michl [mailto:ladis@linux-mips.org] 
> Sent: Wednesday, December 12, 2007 4:37 AM
> To: Jason Huang
> Cc: linux-omap-open-source@linux.omap.com
> Subject: Re: 64MB on OMAP1510/5910?
> 
> On Wed, Dec 12, 2007 at 01:21:56AM -0800, Jason Huang wrote:
> > Hello All,
> > 
> > I searched over the mailing list and did not find a solution for
> > OMAP1510/5910 to use more than 32 MB.
> > 
> > Has anyone made 64MB work on 1510/5910?
> 
> Voiceblue board comes with 64MB RAM, however USB host doesn't work,
> because its driver code maps only 32MB staticaly.
> 
> Best regards,
> 	ladis
> 


As I recall, this is possible, but undocumented.  It will work,
depending on the particular SDRAM you have.  

Set the SDRAM_TYPE field of the EMIFF_SDRAM_CONFIG register to 1101.
Even though the TRM (or SPRU673) says this setting is for 8-bit data bus
width, it works for our 16-bit bus configuration, and I can access 64MB.

Perhaps any listening TI folks could elaborate...


Ralph Walden

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Re: 64MB on OMAP1510/5910?

[Ladislav Michl]

On Wed, Dec 12, 2007 at 05:09:46AM -0800, Jason Huang wrote:
> Thanks for your reply.
> 
> We got the same problem with USB OHCI unrecoverable error interrupt,
> OHCI_INTR_UE.
> 
> Is there any fix/patch to the USB host driver?

No fix exist to my knowledge. You need to implement memory management
for Local Bus or disallow USB driver code to allocate buffers outside of
staticaly mapped 32 MB.

Best regards,
	ladis

Re: 64MB on OMAP1510/5910?

[Ladislav Michl]

On Wed, Dec 12, 2007 at 01:21:56AM -0800, Jason Huang wrote:
> Hello All,
> 
> I searched over the mailing list and did not find a solution for
> OMAP1510/5910 to use more than 32 MB.
> 
> Has anyone made 64MB work on 1510/5910?

Voiceblue board comes with 64MB RAM, however USB host doesn't work,
because its driver code maps only 32MB staticaly.

Best regards,
	ladis

RE: 64MB on OMAP1510/5910?

[Jason Huang]

Thanks for your reply.

We got the same problem with USB OHCI unrecoverable error interrupt,
OHCI_INTR_UE.

Is there any fix/patch to the USB host driver?

Regards,

Jason

-----Original Message-----
From: Ladislav Michl [mailto:ladis@linux-mips.org] 
Sent: Wednesday, December 12, 2007 4:37 AM
To: Jason Huang
Cc: linux-omap-open-source@linux.omap.com
Subject: Re: 64MB on OMAP1510/5910?

On Wed, Dec 12, 2007 at 01:21:56AM -0800, Jason Huang wrote:
> Hello All,
> 
> I searched over the mailing list and did not find a solution for
> OMAP1510/5910 to use more than 32 MB.
> 
> Has anyone made 64MB work on 1510/5910?

Voiceblue board comes with 64MB RAM, however USB host doesn't work,
because its driver code maps only 32MB staticaly.

Best regards,
	ladis

64MB on OMAP1510/5910?

[Jason Huang]

Hello All,

I searched over the mailing list and did not find a solution for
OMAP1510/5910 to use more than 32 MB.

Has anyone made 64MB work on 1510/5910?

Regards,

Jason