[U-Boot-Users] StrataFlash CFI Mode Hang?
Brad.Kemp at Seranoa.com
Tue May 6 16:41:53 CEST 2003
Make sure all your code and data has been relocated.
When reading the CFI information, flash is in an unusable state.
> -----Original Message-----
> From: Tom Guilliams [mailto:tguilliams at sbs.com]
> Sent: Monday, May 05, 2003 6:29 PM
> To: u-boot-users at lists.sourceforge.net
> Subject: [U-Boot-Users] StrataFlash CFI Mode Hang?
> I've ported the PPMC8260 strataflash.c driver to my board's E28F128J3A
> chip and was wondering if anyone's ever seen this -
> As soon as the driver puts the chip in CFI mode (by writing 0x98 to
> offset 0x55 for 8-bit mode), something goes bad and my board freezes.
> This happens every time. I know that's vague but I'm still debugging
> what's really going on. It looks like some interrupt issue but I've
> disabled interrupts and it didn't help. The chip has a
> 16-bit portwidth
> but has been set in 8-bit mode and is on an 8-bit bus (Galileo asynch
> If I fill in the CFI info manual and skip the command to set
> the chip in
> CFI mode, everything's fine. It seems to be just when we
> issue the CFI
> mode command. I've been checking the CFI spec and nothing's clued me
> in. Anyone else seen this? When flash_init() gets called, we're
> already running from RAM. Just wondering, time to set up the BDI.
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