[U-Boot-Users] CFI flash – Problem with erasing boot block.

[U-Boot-Users] CFI flash – Problem with erasing boot block.

[John_s]

Hi All,

I am developing a CFI based flash driver.  I can query the device and get all sector/block information.  I am having problems erasing sectors 1, 2, 3 and 4 (bottom 64-KB), please the flash geometry below.  The problem is that when I attempt to erase sectors 1, 2, 3, OR  4 I end up erasing sectors 1-4 .  Not sure why this is happening.

I am able to erase the remaining sectors, sectors 5 through 19 individually without problems.  

Here is flash?s geometry.  I would appreciate your expert opinion as how to avoid this or even as it why it is happening.  Thanks in advance.

Device: ST?s M29w800DB, Bottom boot block.

Sector 1 	0x00000 ? 0x01fff 
Sector 2 	0x02000 ? 0x02fff
Sector 3	0x03000 ? 0x03fff
Sector 4	0x04000 ? 0x07fff -> First 64Kb boundary. 
Sector 5 	0x08000 ? 0x07fff -> All remaining sectors are 64 -Kb bulk sectors.
?????????????.
Sector 19	0x78000 ? 0x7ffff
 

- John

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[U-Boot-Users] CFI flash – Problem with erasing boot block.

[Wolfgang Denk]

In message <2364075.post@talk.nabble.com> you wrote:
> 
> I am developing a CFI based flash driver.  I can query the device and get

Why are you doing this? Why aren't you just using the existing CFI driver?

> ------=_Part_191_16056191.1137167602496
> Content-Type: text/html; charset=UTF-8
> Content-Transfer-Encoding: quoted-printable

And why the .... are posting HTML here? Don't do this!

Best regards,

Wolfgang Denk

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Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
It is easier to change the specification to fit the program than vice
versa.