[U-Boot] ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[Heiko Schocher]

Hello wind_embedded,

wind_embedded wrote:
> Hello:
>  
>    Now I port u-boot into mpc8247, I need everyone's help, thanks!
>  
>    my board configuration is following:
>    chip select  chip        size  address
>    CS0          AM29LV040B  512K  0xfff00000
>    CS1          S29GL256P   64M   0xff800000
>    CS2          SDRAM       256M  0x00000000
>  
>    Before I use VxWorks, it works fine. When I port u-boot, my project
> based on IDS8247. I changed configuration in IDS8247.h and updated
> flash.c, after I compiled u-boot, I burned u-boot.bin into AM29LV040B.
> Console output(DEBUG is defined):
>    CPU:   MPC8247 (HiP7 Rev 14, Mask 1.0 1K50M) at 400 MHz

Which version of u-boot do you use?

>    Board: ADS 8247
>    I2C:   ready
>    DRAM:  128 MB
>    Top of RAM usable for U-Boot at: 08000000
>    Reserving 160k for U-Boot at: 07fd7000
>    Reserving 192k for malloc() at: 07fa7000
>    Reserving 76 Bytes for Board Info at: 07fa6fb4
>    Reserving 72 Bytes for Global Data at: 07fa6f6c
>    Stack Pointer at: 07fa6f48
>    New Stack Pointer is: 07fa6f48
>    Now running in RAM - U-Boot at: 07fd7000
>    FLASH: Manuf. ID @ 0xfff00000: 0x00000004
>    ## Unknown FLASH on Bank 0 - Size = 0x00000000 = 0 MB
>    flash_protect ON: from 0xFFF00000 to 0xFFF22FFF
>    flash_protect ON: from 0xFFF70000 to 0xFFF7FFFF
>    *** failed ***
>    ### ERROR ### Please RESET the board ###
>  
>    I found the manufacture ID of flash is error , it should be 0x01, but
> it is 0x04, it is the first byte that u-boot.bin file was burned into
> AM29LV040. In my flash.c file, the code that I get manufacture ID as
> following:
>    ...
>    flash_cmd_autoselect (base);
>    mfrId= U8_READ (base);
>    flash_cmd_reset (base);

Hmm.. what code is this? It looks to me, that you don;t use
the CFI drvier! Please try this driver to access your flash.

bye,
Heiko
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