[U-Boot-Users] Re: Problem with the cfi flash driver with a x8/x16 flash configuredin x8 mode.

[U-Boot-Users] Re: Problem with the cfi flash driver with a x8/x16 flash configuredin x8 mode.

[Alex BASTOS]

Txema,

> Does anybody test the cfi  flash driver (cfi_flash.c) with a  x8/x16
> flash configured in x8 mode ? I'm trying to port U-Boot for a Lite5200B
> with a S29GL128N flash (CFI compliant) using the cfi flash driver.
> U-Boot detects the flash correctly but It's unable to erase or write the
> flash. In my case the following patch fix the bug but I'm not completly
> sure If It's only a bug with my configuration. Any suggestions? Could
> anybody test the patch in other architecture?

I think your topic is very similar to this recent one:

http://thread.gmane.org/gmane.comp.boot-loaders.u-boot/19970

and previous similar patches have been submited and are still
pending (but it seems they are coming, read the whole thread)

So, yes, til now cfi_flash didn't support x8 mode for AMD chips,
but it will.

Best regards,

Alex BASTOS

[U-Boot-Users] Re: Problem with the cfi flash driver with a x8/x16 flash configuredinx8 mode.

[Txema Lopez]

Alex BASTOS wrote:

Thanks Alex,

>Txema,
>
>  
>
>>Does anybody test the cfi  flash driver (cfi_flash.c) with a  x8/x16
>>flash configured in x8 mode ? I'm trying to port U-Boot for a Lite5200B
>>with a S29GL128N flash (CFI compliant) using the cfi flash driver.
>>U-Boot detects the flash correctly but It's unable to erase or write the
>>flash. In my case the following patch fix the bug but I'm not completly
>>sure If It's only a bug with my configuration. Any suggestions? Could
>>anybody test the patch in other architecture?
>>    
>>
>
>I think your topic is very similar to this recent one:
>
>http://thread.gmane.org/gmane.comp.boot-loaders.u-boot/19970
>  
>
OK, I've checked it.

>and previous similar patches have been submited and are still
>pending (but it seems they are coming, read the whole thread)
>  
>
But not the patch that Wolfgang proposed, isn'it?

>So, yes, til now cfi_flash didn't support x8 mode for AMD chips,
>but it will.
>
>Best regards,
>
>Alex BASTOS
>
>
>
>
>  
>
I think the patch that Wolfgang proposed could be like that. I've tested 
it with a S29GL128N x8/x16 in x8 mode. It works fine. But I have no idea 
what would happen in  x16 mode or others modes. I haven't the hardware 
to check it.

--- ../tmp/u-boot/drivers/cfi_flash.c   2006-01-12 12:22:08.000000000 +0100
+++ drivers/cfi_flash.c 2006-01-12 17:21:19.000000000 +0100
@@ -107,9 +107,10 @@

 #define AMD_STATUS_TOGGLE              0x40
 #define AMD_STATUS_ERROR               0x20
-#define AMD_ADDR_ERASE_START           0x555
-#define AMD_ADDR_START                 0x555
-#define AMD_ADDR_ACK                   0x2AA
+
+#define AMD_ADDR_ERASE_START           (0xAAA >> (info->portwidth-1))
+#define AMD_ADDR_START                 (0xAAA >> (info->portwidth-1))
+#define AMD_ADDR_ACK                   (0x555 >> (info->portwidth-1))

 #define FLASH_OFFSET_CFI               0x55
 #define FLASH_OFFSET_CFI_RESP          0x10

Best regards,
Jose Maria Lopez.
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[U-Boot-Users] Re: Problem with the cfi flash driver with a x8/x16 flash configuredinx8 mode.

[Wolfgang Denk]

In message <43C68711.7080302@aotek.es> you wrote:
> 
> I think the patch that Wolfgang proposed could be like that. I've tested 
> it with a S29GL128N x8/x16 in x8 mode. It works fine. But I have no idea 
> what would happen in  x16 mode or others modes. I haven't the hardware 
> to check it.
> 
> --- ../tmp/u-boot/drivers/cfi_flash.c   2006-01-12 12:22:08.000000000 +0100
> +++ drivers/cfi_flash.c 2006-01-12 17:21:19.000000000 +0100

Not used. Version from Txema Lopez  <tlopez@aotek.es>  from  16.  01.
2006 applied instead. Closed. Thanks.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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