Albert,
first of all, your device shoud be connected properly to the EMIF bus. Let's
assume you did it.
KERNEL CHANGES:
Be sure to have in .config
CONFIG_MTD_PHYSMAP_START=0x2000000 (or wherever your flash base address is)
CONFIG_MTD_PHYSMAP_LEN=0x2000000 (i.e. 32MB)
In arch/arm/mach-davinci/board-yourboardname.c (or wherever your flash
partitions are defined) you have to have
static struct resource davinci_yourboardname_norflash_resource = {
.start = NOR_FLASH_PHYS,
//i.e. 0x2000000
.end = NOR_FLASH_PHYS + SZ_32M - 1;
//i.e. 0x2000000 + 0x2000000 - 1
.flags = IORESOURCE_MEM,
};
U-BOOT CHANGES:
But, I'm not sure this is all what you need. The flash device is initialized by
the bootloader. I applied the following changes to u-boot (1.1.4) to make it
able to recognize my flash (INTEL PC28F256P30B85):
board/yourboardname/flash_params.h
be sure NORFlashType enum contains your flash type (in my case it is
FLASH_INTEL_P30_32MB_BOTTOM)
board/yourboardname/flash.c
in flash_print_info() add
case FLASH_28F256P30B: fmt = "28F256P30B\n";
break;
in flash_get_size() add
case (FPW)INTEL_ID_28F256P30B: /* Intel
StrataFlash 28F256P30B */
info->flash_id += FLASH_28F256P30B;
info->sector_count = 259;
info->size = 0x02000000;
for (i = 0; i < info->sector_count; i++)
{
if (i < 255)
info->start[i] =
(ulong)addr + 0x20000 * i;
else
info->start[i] =
(ulong)addr + 0xfe0000 + 0x8000 * (i-255);
}
break;
in include/flash.h add the following definitions. They specify the number and
size of sectors (you can find these values consulting the datasheet)
#define INTEL_ID_28F256P30B 0x891C891C
#define FLASH_28F256P30B 0x00BD
I hope this helps
Regards
Gabriele
Da: Albert Burbea [mailto:[EMAIL PROTECTED]
Inviato: giovedì 7 agosto 2008 18.08
A: Gabriele Filosofi
Cc: [email protected]
Oggetto: Re: I: how can I get visibility to the full 32MB size of my flash?
hi gabriele
can you please explain how you did it?
Albert
On 8/7/08, Gabriele Filosofi <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>>
wrote:
Hi,
For your information, this is just a SW limitation, not an intrinsic EMIF
limitation. Indeed I was able to adjust things in SW and now the entire 32MB
flash space can be accessed on my board.
Gabriele
_____________________________________________
Da: Gabriele Filosofi
Inviato: mercoledì 6 agosto 2008 11.54
A:
'[email protected]<mailto:[email protected]>'
Oggetto: how can I get visibility to the full 32MB size of my flash?
Hi,
I Read that DaVinci supports only 16MByte NOR. Is this a device or a SW
limitation? If it is a SW limitation, how can I get visibility to the full
32MByte size of my flash?
Thanks a lot
Gabriele
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--
Albert Burbea
Harishonim 8
Ramat Gan 52502, Israel
Tel/Fax + 972-3-7526016
Mobile: +972-52-3541842
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