[U-Boot] Adding dataflash support for at91sam9m10g45ek

[U-Boot] Adding dataflash support for at91sam9m10g45ek

[Thad Phetteplace]

Hello all,

I am trying to add dataflash support for the at91sam9m10g45ek to a
recent version of u-boot (2010.06 or later).  I have a patched version
of u-boot-1.3.4 from linux4sam that works, and a glance at more recent
code seems to show dataflash supported on other at91 boards in
versions >= 2010.06.  Using the linux4sam code and other atmel boards
as a reference, I've added dataflash support for the at91sam9m10g45ek.
 It almost works, but I'm getting occasional bad reads leading to CRC
failures and occasionally the SPI bus stops talking completely.  After
reviewing code, spec sheets, etc... I'm at a loss as why this is
failing.  I am mostly riding on top of the existing Atmel SPI
dataflash support already in u-boot, basically just adding some board
specific calls to init the SPI interface.  Anyone here have any ideas?
 Any known hardware issues I need to be working around?  Patches I
should be looking at?

Thanks,

Thad Phetteplace

[U-Boot] Adding dataflash support for at91sam9m10g45ek

[Bo Shen]

On 5/12/2012 15:38, Thad Phetteplace wrote:
> Hello all,
>
> I am trying to add dataflash support for the at91sam9m10g45ek to a
> recent version of u-boot (2010.06 or later).  I have a patched version
> of u-boot-1.3.4 from linux4sam that works, and a glance at more recent
> code seems to show dataflash supported on other at91 boards in
> versions>= 2010.06.  Using the linux4sam code and other atmel boards
> as a reference, I've added dataflash support for the at91sam9m10g45ek.
>   It almost works, but I'm getting occasional bad reads leading to CRC
> failures and occasionally the SPI bus stops talking completely.  After
> reviewing code, spec sheets, etc... I'm at a loss as why this is
> failing.  I am mostly riding on top of the existing Atmel SPI
> dataflash support already in u-boot, basically just adding some board
> specific calls to init the SPI interface.  Anyone here have any ideas?
>   Any known hardware issues I need to be working around?  Patches I
> should be looking at?

I don't know the detail method you implemented this.
Would you please try the following patch and test again

diff --git a/include/configs/at91sam9m10g45ek.h 
b/include/configs/at91sam9m10g45ek.h
index 159857d..af0611c 100644
--- a/include/configs/at91sam9m10g45ek.h
+++ b/include/configs/at91sam9m10g45ek.h
@@ -125,6 +125,14 @@
  /* No NOR flash */
  #define CONFIG_SYS_NO_FLASH

+/* Serial flash */
+#define CONFIG_CMD_SF
+#ifdef CONFIG_CMD_SF
+#define CONFIG_ATMEL_SPI
+#define CONFIG_SPI_FLASH
+#define CONFIG_SPI_FLASH_ATMEL
+#endif
+
  /* NAND flash */
  #ifdef CONFIG_CMD_NAND
  #define CONFIG_NAND_ATMEL


> Thanks,
>
> Thad Phetteplace
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