Re: [Gc-linux-devel] Debian and SD cards

[Rob R. <ro...@re...>]

Personally I think the best way is to use kernel/drivers/mmc/mmc.c. 
Write/adapt a host interface for that and perhaps patch it to accept SD 
as well. SD just needs a little different initialisation, code is in the 
existing sd card driver. Unfortunately, I won't have the time to do 
that, working about 24/7 on this: http://www.solarteamtwente.nl/ . This 
is a project which has a deadline end of august, and we need to get a 
lot done to get everything working on time :(

Regards Rob


GoatZilla wrote:

>Hello again.
>
>I just started looking at the driver when the thought occurred to me...
>
>Would this driver speed things up?  It was written to stick an MMC
>card on one of those Linksys routers.  Yank out the bit twiddling of
>the GPIO port, stuff the EXI calls in their place?
>
>http://kiel.kool.dk:27/mmc.c
>
>
>
>
>
>On 7/10/05, Rob Reilink <ro...@re...> wrote:
>  
>
>>GoatZilla wrote:
>>
>>    
>>
>>>Hi, I had a few questions about the GC Linux happenings...
>>>
>>>
>>>1.  How fast is the SD card access on the GC?
>>>
>>>
>>>
>>>      
>>>
>>Max speed of the SD card in 1 bit mode (which must be used on the GC) is
>>25Mbit/s. Unfortunately, the GC allows to choose for 16Mbit or 27Mbit.
>>So with a little overclocking (which is really just a software setting)
>>27MBit/s is possible
>>
>>    
>>
>>>2.  Are there any plans underway to just enable running Debian on the
>>>GC (non-NFS)?  It would be nice to be able to simply boot the PowerPC
>>>netinst image with a minor amount of hacking, and just do a netinst
>>>onto and run off of SD, since flash is so cheap nowadays.  Hence my
>>>question #1...
>>>
>>>
>>>
>>>      
>>>
>>Plans have been there to enable a GC to run just off an SD card w/o NFS
>>(or without network at all if you boot another way than PSO). It should
>>be no problem, except:
>>-afaik the SD driver has been disabled since the EXI framework has been
>>changed
>>-I (writer of the original SD driver) have no time to fix it or to get
>>playing with the SD-only boot method
>>
>>Rob
>>
>>    
>>
>>>Thanks!
>>>
>>>
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