[U-Boot-Users] board/x/flash.c required calls

Daren Hayward darenh at 4bridgeworks.com
Tue May 18 11:10:13 CEST 2004


there are bugs in the cfi code, and it also does not handle a 16bit flash
operating as an 8bit chip on an 8 bit bus.

I have made some modifications to the cfi code and it now works for one of
our boards, I am awaiting our other board to test it this week, at which
point if it works I will send a patch, if anyone else would like to test the
cfi code for me that would be great just let me know and I will send you the


-----Original Message-----
From: Brad Kemp [mailto:Brad.Kemp at Seranoa.com]
Sent: 17 May 2004 16:12
To: Daren Hayward
Subject: RE: [U-Boot-Users] board/x/flash.c required calls

Did cfi_flash.c see the cfi at all?
The cfi detect routine does not determine the type of flash only the
If you send me the debug output I might be able to tell you what went
> -----Original Message-----
> From: Daren Hayward [mailto:darenh at 4bridgeworks.com] 
> Sent: Friday, May 14, 2004 4:24 AM
> To: U-Boot User List
> Subject: [U-Boot-Users] board/x/flash.c required calls
> I have a custom board based on the walnut 405, I have managed 
> to get U-Boot
> up and running on the board until it tries to setup the 
> Flash, I have code
> that already works with for the flash (in house bootloader) 
> and I need to
> know what calls are required in flash.c i.e. flash_init(), is there a
> document containing this information?
> I have also tried to get CFI to detect the flash, but it is unable to
> determine the flash type (ATMEL AT49BV322A, operating as 
> 4Mx8) , I have a
> JTAG programmer that successfully reads the CFI data too.
> I #defined DEBUG 1 and can see the attempt of CFI to detect 
> the flash, alas
> no valid data is returned.
> Cheers
> Daren
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