Dear Sir: Version:U-Boot 2010.06-rc2-00006-g28ccd77-dirty (Jun 24 2010 - 20:35:40) (from git) Flash:Flash Type: MXIC Flash MX29GL128E, per bank 128Mbits.
and...I do some test..
After u-boot enter main_loop, I can not write data to flash via trace32.
But I load my simple trace32 script, I can write data to flash via trace 32. simple initial of trace32: ========================================= D.S DCR:0xF9 %LONG %BE 000000019 ; CPC0_PCI, PerWE, PAE D.S DCR:0xF6 %LONG %BE 0 gosub IEBC "EBC0_B0AP" 0x10 007869200 gosub IEBC "EBC0_B0CR" 0x00 0FF09A000 ; 16MB @FE000000 ========================================= When I verify the value of "EBC and CPC0_PCI" register. u-boot and simple script fill the same value on "EBC and CPC0_PCI"
I am trying to find out what registers protect flash from writing.
And thank you that give much hints to me.
On Tue, Jun 15, 2010 at 3:54 PM, Detlev Zundel dzu@denx.de wrote:
Hello Chen,
Thanks for your advice!! When I try to erase across flash bank, I get error message before. "Error: cannot span across banks when they are mapped in reverse order"
Now I fix the order of banks. And I can erase sector across flash bank now.
Excellent.
But I still found that I can not erase first two sector.
Ok, now I have to ask the ever-repeating questions - can you tell us more about the version of U-Boot you are using and the actual Flash chip that you use? Maybe the flash chip has some kind of write protection feature which needs to be taken car of?
Cheers Detlev
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