Stefan,
The flash chips are Intel JS28F160 (2MiB), JS28F320 (4MiB) and JS28F640 (8MiB).
Regards, TsiChung
-----Original Message----- From: Stefan Roese [mailto:sr@denx.de] Sent: Wednesday, July 04, 2007 1:21 AM To: u-boot-users@lists.sourceforge.net Cc: Liew Tsi Chung-r5aahp; Wolfgang Denk; Detlev Zundel Subject: Re: [U-Boot-Users] U-boot ColdFire development
Hi TsiChung,
On Tuesday 03 July 2007, Liew Tsi Chung-r5aahp wrote:
The CFG_FLASH_USE_BUFFER_WRITE does not help in this case because the intel flash chip on M5329EVB does not support Buffer Write. (It could be verified by reading the CFI at offset 0x2a)
Which chips is it? Just curious.
I were doing an experiment days ago by redirected some of the CFI driver functions to board specific flash driver functions. I replaced flash_write_cfiword() in write_buff() to write_data(). Program the flash for 1MB. flash_add_byte() is ~5s more than total time in board specific flash driver. Replaced the write_data() flash status check in while loop - while ((*addr & (u16) FLASH_STATUS_DONE) != (u16) FLASH_STATUS_DONE) to while(!flash_isset (info, sec, 0, FLASH_STATUS_DONE)), this will add another ~11s.
Seems there is some need to enhance the CFI driver. Unfortunately we don't have an custodian for this anymore.
There are some overhead in the CFI flash driver for non Buffer Write. Anyway, I am going to use the CFI flash driver from now on.
Thanks. We should keep in mind to address you thoughts about speed improvement later.
Best regards, Stefan
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