Hi
What are those "I/O accessor functions"? API present in
./drivers/mtd/nand/fsl_upm.c file??? I am also getting crash while doing
dummy write to NAND_BASE. Code is follows....
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<32;i++)
{
*(int *)(MDR) = UPMATable[i];
udelay (100);
/* *(int *)(MAMR) = 0x10000000;
*
* *(int *)(MAMR) = 0x10000000+i;*/
/*dummy write*/
*(char *)(CFG_NAND_BASE) = 0xff;
}
.............
}
Rgds
Koteswar
wd wrote:
>
> Dear "nanda",
>
> In message <20091220172434.48360.qm...@f5mail-237-207.rediffmail.com> you
> wrote:
>>
>> 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: w...@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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