Hi Prakash,
On Tuesday 13 April 2010 13:46:11 prakash bedge wrote:
Are you not using the mainline version of cfi_flash.c? If not, which "fixup code" are you referring to (link)?
I am using U-Boot 2009.08 version.
This version is outdated. I suggest to switch to current code.
I used the fixup for M29W128GH chip from the patch you suggested earlier. In that code, I changed the condition to check chipwidth and it works.
You shouldn't need any additional code to support the Spansion S29GL chips. Please use the latest code from mainline U-Boot.
But I have a concern now, as it works with by changing chipwidth to 16Bit or portwidth to 16Bit. This is making me a little bit confuse. if(info->chipwidth == FLASH_CFI_16BIT) info->portwidth = FLASH_CFI_8BIT;
if(info->chipwidth == FLASH_CFI_8BIT) info->portwidth = FLASH_CFI_16BIT;
???
Can you please tell what is chipwidth and portwidth and how we can find that?
chipwidth: Width of the NOR FLASH chip, meaning count of data lines actively used.
portwidth: Width of the external bus (data lines).
Also I am not getting the correct manufacturer and device ids.
From the flash control register I can see that my device is 16 Bit.It reprsent a bit set 1 saying it is a 16 bit device. Now is this flash chipwidth or flash portwidth?
chipwidth.
To my flash chip 16 data lines and 26 address lines are connected.
So you have chipwidth *and* portwidth of 16! This is the most common use case. Again, please use the mainline CFI driver and give it another try.
Perhaps a problem of incorrect unlocking addresses (byte vs. word
address)? Does it mean that unlocking addresses are not correct? Supoose if chip is in word mode then what should be the portwidth and chipwidth? What will be the ublocking address then?
I am using an utilty to erase flash and to load uboot image and it is working fine, only that it copies data at multple locations.
What kind of "utility"? Don't you use the BDI3000 for FLASH programming? This mirroring might a a result of an incorrect EBC setup.
Cheers, Stefan
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