[LinuxBIOS] Pm49FL002 Flash

[YhLu]

K8T890 with PCI-E should be more interesting...

YH 

> -----Original Message-----
> From: Hugo MERCIER [mailto:hugo.mercier at laposte.net] 
> Sent: Wednesday, June 01, 2005 10:34 AM
> To: linuxbios at openbios.org
> Subject: [LinuxBIOS] Pm49FL002 Flash
> 
> Hi,
> 
>   I'm new to this list and to the project. I'd like to add 
> support for the Asus A7V600 motherboard (VT8237 and KT600 
> based). I don't have many time, I'am not very familiar with 
> chipset low level programming, but ...
> I found LinuxBios is an interesting project ;)
> 
>   Until now, I spend my time gathering informations (manuals 
> and datasheet - with a request to VIA) and looking to the 
> linuxbios code.
> 
>   I just wanted to add flash support to the flash_rom util to 
> start something. My motherboard is using the Pm49FL002 flash 
> memory. It's the same as the Pm49FL004 with 2Mb instead of 4Mb.
> 
>   With respect to the Pm49FL002 datasheet, it seems to act as 
> Jedec. So, I added this to flash_rom.c:
>         {"Pm49FL002",   PMC_ID,         PMC_49FL002,    NULL, 
> 256, 16 *
> 1024,
>          probe_jedec,   erase_chip_jedec, NULL,NULL},
> and to flash_rom.h:
> #define PMC_49FL002       0x6D  /* PMC 49FL002 device code      */
> 
>   I just wanted to test the probing (No erasing or programming yet).
> And ... it fails. flash_rom doesn't find anything : the 
> reported IDs bytes are the same as those reported without the 
> probing memory cycles (0x555,0xAAA, ...)
> 
>   So ... what am I doing wrong ? Do I have to set some bit in 
> the Northbridge registers ?
> 
> 
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