From mboxrd@z Thu Jan  1 00:00:00 1970
From: KoteswarK <koti.kelam@gmail.com>
Date: Sun, 20 Dec 2009 21:55:48 -0800 (PST)
Subject: [U-Boot] Crash nand init  UPMA - NAND flash MPC832x
In-Reply-To: <20091220184041.B339E3F6FF@gemini.denx.de>
References: <20091220172434.48360.qmail@f5mail-237-207.rediffmail.com>
	<20091220184041.B339E3F6FF@gemini.denx.de>
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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.qmail@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: 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.
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
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> 
> 

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