[U-Boot-Users] Configuring Spansion flash

Yasothabalan
2007-09-14T15:12:51Z

So how shall I proceed next Ben.
Where and in which file this configuration is done?

Whenever I trace out which flash is detected, it always gets detects as
FLASH_UNKNOWN.

In flash.c file....

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
ulong flash_get_size (FPWV *addr, flash_info_t *info)
{
int i;
FPWV* addr2;

/* Write auto select command: read Manufacturer ID */
/* Write auto select command sequence and test FLASH answer */
addr[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* for AMD, Intel
ignores this */
addr[FLASH_CYCLE2] = (FPW)0x00550055; /* for AMD, Intel
ignores this */
addr[FLASH_CYCLE1] = (FPW)0x00900090; /* selects Intel or AMD
*/

/* The manufacturer codes are only 1 byte, so just use 1 byte.
* This works for any bus width and any FLASH device width.
*/
udelay(100);
switch (addr[0] & 0xff) {

case (uchar)AMD_MANUFACT:
info->flash_id = FLASH_MAN_AMD;
break;

case (uchar)INTEL_MANUFACT:
info->flash_id = FLASH_MAN_INTEL;
break;

default:
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
break;
}

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Regards,
Yasotha Balan R
Member Technical Staff - HPEG
HCL Technologies Ltd.
73,74, South Phase Road, Ambattur Indutrial Estate, Chennai 600058.
Tel: +91-044-43935000 Extn. (5076)
Mob: +91-9994309885
www.hcltech.com
www.hcl.in

-----Original Message-----
From: Ben Warren [mailto:bwarren at qstreams.com]
Sent: Friday, September 14, 2007 8:31 PM
To: Yasothabalan Ramaswamy-TLS,Chennai
Cc: u-boot-users at lists.sourceforge.net
Subject: Re: [U-Boot-Users] Configuring Spansion flash

Yasothabalan Ramaswamy-TLS,Chennai wrote:
> Thanks Ben.
>
> I checked out in my board and found the part number to be:
>
> S29GL128N90-R2. (128Mb)
>
>
OK. That's a good start. This is a very common flash type.
> Regards,
> Yasotha Balan R
>
> -----Original Message-----
> From: Ben Warren [mailto:bwarren at qstreams.com]
> Sent: Friday, September 14, 2007 7:54 PM
> To: Yasothabalan Ramaswamy-TLS,Chennai
> Cc: u-boot-users at lists.sourceforge.net
> Subject: Re: [U-Boot-Users] Configuring Spansion flash
>
> Yasothabalan Ramaswamy-TLS,Chennai wrote:
>
>> Hi all,
>>
>> I am using Lite5200B board with SPANSION type flash. UBoot code
>> doesn't detect this flash.
>>
>>
I don't know anything about this board or processor, but there are
people here who do. Please elaborate on what you mean by 'U-boot code
doesn't detect this flash', and provide details on the steps you've
taken to reach this conclusion.

Also, please don't top-post. Post responses directly after the relevant
parts of e-mail messages. The previously-mentioned curmudgeons will eat
your children if you continue this habit.

regards,
Ben

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