Anyone got drivers/mtd/maps/pm828.c?

Anyone got drivers/mtd/maps/pm828.c?

[Alex Zeffertt]

Hi there,

I need to get flash partitions working on my PM828 development board. 
Has anybody already written a pm828.c?  If so I'd appreciate a look at
it.

TIA,

Alex

Re: Anyone got drivers/mtd/maps/pm828.c?

[Clemens Koller]

Hi, Alex!

Hmm, I don't know the PM828 much in detail, but have you
tried the "generic" physmap driver which is in the kernel?
Just give it the base address and the size, and it should
probe the cfi and you are done (well, it was working fine
for me on my PM854).
Of course, you need to make sure, that your hardware / memory
mapping is initialized properly (which happens usually in the
boot loader). If it's not, let me know and I can give you
some code to mess around with the registers in a kernel module.

Best greets,

Clemens Koller
_______________________________
R&D Imaging Devices
Anagramm GmbH
Rupert-Mayer-Str. 45/1
81379 Muenchen
Germany

http://www.anagramm.de
Phone: +49-89-741518-50
Fax: +49-89-741518-19


Alex Zeffertt wrote:
> Hi there,
> 
> I need to get flash partitions working on my PM828 development board. 
> Has anybody already written a pm828.c?  If so I'd appreciate a look at
> it.
> 
> TIA,
> 
> Alex
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> 

Re: Anyone got drivers/mtd/maps/pm828.c?

[Alex Zeffertt]

[-- Attachment #1: Type: text/plain, Size: 2043 bytes --]

Hi Clemens,

Thanks for your help.  I've done it now (see attached).  The
partitioning is specific to our application but it is easily modified.

I noticed a buggette in the mtd code while doing this.  If you build
everything as a module then the sub-module loading doesn't work
properly.  For example in gen_probe.c it says

#ifdef CONFIG_MTD_CFI_INTELEXT
	case 0x0001:
	case 0x0003:
		return cfi_cmdset_0001(map, primary);
#endif

where it should really say

#if defined(CONFIG_MTD_CFI_INTELEXT) ||
    defined(CONFIG_MTD_CFI_INTELEXT_MODULE)
	case 0x0001:
	case 0x0003:
		return cfi_cmdset_0001(map, primary);
#endif

There are several problems like this.  In the end I gave up and just
built everything except the actual mapping driver as kernel resident.

Alex


On Wed, 15 Jun 2005 15:18:37 +0200
Clemens Koller <clemens.koller@anagramm.de> wrote:

> Hi, Alex!
> 
> Hmm, I don't know the PM828 much in detail, but have you
> tried the "generic" physmap driver which is in the kernel?
> Just give it the base address and the size, and it should
> probe the cfi and you are done (well, it was working fine
> for me on my PM854).
> Of course, you need to make sure, that your hardware / memory
> mapping is initialized properly (which happens usually in the
> boot loader). If it's not, let me know and I can give you
> some code to mess around with the registers in a kernel module.
> 
> Best greets,
> 
> Clemens Koller
> _______________________________
> R&D Imaging Devices
> Anagramm GmbH
> Rupert-Mayer-Str. 45/1
> 81379 Muenchen
> Germany
> 
> http://www.anagramm.de
> Phone: +49-89-741518-50
> Fax: +49-89-741518-19
> 
> 
> Alex Zeffertt wrote:
> > Hi there,
> > 
> > I need to get flash partitions working on my PM828 development
> > board. Has anybody already written a pm828.c?  If so I'd appreciate
> > a look at it.
> > 
> > TIA,
> > 
> > Alex
> > _______________________________________________
> > Linuxppc-embedded mailing list
> > Linuxppc-embedded@ozlabs.org
> > https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> > 

[-- Attachment #2: pm828-icu.c.gz --]
[-- Type: application/x-gzip, Size: 2480 bytes --]

Re: sub-module loading (was: Anyone got drivers/mtd/maps/pm828.c?)

[Clemens Koller]

Hi, Alex...
good to know, that you made good progress. :-)

I just X-post this to linux-mtd so maybe somebody can have a look
at your issue, too.

I also experienced "problems" with sub-module-loading. Or maybe
I just missed something:
I need to load mtdchar and map_ram separately in order to be
able to probe my mminfo.ko module to access/mess some
SRAM in my FPGA on a MPC8540. I didn't care about that yet,
but maybe there are missing dependencies which can be solved
automagically here. Or is the sub-module loading supposed to
work like this (well, manual) as somebody might want to choose
in between i.e. mtdblock and/or mtdchar?

I'm talking about the Kernel 2.6.11.11 mtd subsystem.

Best greets,

Clemens Koller
_______________________________
R&D Imaging Devices
Anagramm GmbH
Rupert-Mayer-Str. 45/1
81379 Muenchen
Germany

http://www.anagramm.de
Phone: +49-89-741518-50
Fax: +49-89-741518-19

Alex Zeffertt wrote:
> Hi Clemens,
> 
> Thanks for your help.  I've done it now (see attached).  The
> partitioning is specific to our application but it is easily modified.
> 
> I noticed a buggette in the mtd code while doing this.  If you build
> everything as a module then the sub-module loading doesn't work
> properly.  For example in gen_probe.c it says
> 
> #ifdef CONFIG_MTD_CFI_INTELEXT
> 	case 0x0001:
> 	case 0x0003:
> 		return cfi_cmdset_0001(map, primary);
> #endif
> 
> where it should really say
> 
> #if defined(CONFIG_MTD_CFI_INTELEXT) ||
>     defined(CONFIG_MTD_CFI_INTELEXT_MODULE)
> 	case 0x0001:
> 	case 0x0003:
> 		return cfi_cmdset_0001(map, primary);
> #endif
> 
> There are several problems like this.  In the end I gave up and just
> built everything except the actual mapping driver as kernel resident.
> 
> Alex
> 
> 
> On Wed, 15 Jun 2005 15:18:37 +0200
> Clemens Koller <clemens.koller@anagramm.de> wrote:
> 
> 
>>Hi, Alex!
>>
>>Hmm, I don't know the PM828 much in detail, but have you
>>tried the "generic" physmap driver which is in the kernel?
>>Just give it the base address and the size, and it should
>>probe the cfi and you are done (well, it was working fine
>>for me on my PM854).
>>Of course, you need to make sure, that your hardware / memory
>>mapping is initialized properly (which happens usually in the
>>boot loader). If it's not, let me know and I can give you
>>some code to mess around with the registers in a kernel module.
>>
>>Best greets,
>>
>>Clemens Koller
>>_______________________________
>>R&D Imaging Devices
>>Anagramm GmbH
>>Rupert-Mayer-Str. 45/1
>>81379 Muenchen
>>Germany
>>
>>http://www.anagramm.de
>>Phone: +49-89-741518-50
>>Fax: +49-89-741518-19
>>
>>
>>Alex Zeffertt wrote:
>>
>>>Hi there,
>>>
>>>I need to get flash partitions working on my PM828 development
>>>board. Has anybody already written a pm828.c?  If so I'd appreciate
>>>a look at it.
>>>
>>>TIA,
>>>
>>>Alex
>>>_______________________________________________
>>>Linuxppc-embedded mailing list
>>>Linuxppc-embedded@ozlabs.org
>>>https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>>>