[U-Boot] Crash nand init UPMA - NAND flash MPC832x

[nanda]

Hi,
  IO accessor function did not work out for us. But we survived from the crash in the UPM programming, if I move the base address of NAND after the NOR flash base address it programmed the UPM successfully.  


Earlier Configuration ( Crash while programming UPMA):
------------------------------------------------------
CFG_NAND_BASE  0xFA000000 // 64 MB NAND flash 
CFG_FLASH_BASE 0xFE000000 // NOR flash size is 16MB flash


Now Configuration(UPM Programming success case) :
---------------------------------------------------
CFG_NAND_BASE  0xFB000000 // 64 MB NAND flash 
CFG_FLASH_BASE 0xFA000000 // NOR flash size is 16MB flash


Our summarized configuration file
include/configs/MPC832x_RDB.h  is as below

NOR Flash Configuration using Local bus 0:
------------------------------------------

CFG_FLASH_BASE 0xFA000000 // NOR flash size is 16MB flash
CFG_BR0_PRELIM  (CFG_FLASH_BASE |       /* Flash Base address */ \
                (2  
> Our development needs NAND to be implemented from u-boot level. And our booting from FLASH depends of NOR flash using the GPCM.
> 
> We are facing in the initialization of the nand_init, a crash in the dummy write during the UPM program based on the UPM mode of freescale MPC8323 in the code below:
> 
> void UPMA_prog()
> {
> int i=0;
> // OP set to write to RAM array command
> *(int *)(MAMR) = 0x10000000;
> // Write word to RAM arrays
> for (i=0;i

There is no such code in mainline U-Boot. I recommend you look for
existing (and working) code examples when porting U-Boot to your
hardware. Note that you should use I/O accessor functions instead of
plain register writes.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Digital computers are themselves more complex than most things people
build: They have very large numbers of states. This makes conceiving,
describing, and testing them hard. Software systems  have  orders-of-
magnitude more states than computers do.           - Fred Brooks, Jr.

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