[U-Boot] 答复: ppc, flash init on mpc8247, Unknown FLASH on Bank 0
wind_embedded
wind_embedded at sina.com
Wed Oct 13 10:03:09 CEST 2010
On Wednesday, October 13, 2010, wind_embedded <wind_embedded at sina.com> 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):
What version of U-Boot are you using? It looks like you are not using
the CFI driver which has supported the AM29LV040B for some time now.
Have a look at the eNET board from current mainline - it uses the same
flash without issue
> CPU: MPC8247 (HiP7 Rev 14, Mask 1.0 1K50M) at 400 MHz
> 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);
> ...
> The functions that above code called is as following:
> #define U8_WRITE(reg, val) (*((volatile uchar *)(reg)) =
> ((uchar)((val)&0xFF)))
> #define U8_READ(reg) (*((volatile uchar *)(reg)))
> static void flash_cmd_reset (ulong base)
> {
> U8_WRITE (base + 0x0, 0xF0);
> }
> static void flash_cmd_unlock (ulong base)
> {
> U8_WRITE (base + 0x555, 0xAA);
> U8_WRITE (base + 0x2AA, 0x55);
> }
> static void flash_cmd_autoselect (ulong base)
> {
> flash_cmd_unlock (base + 0x555);
> U8_WRITE (base + 0x555, 0x90);
> }
>
> I want to get everyone's help, thank you very much!
>
Use the latest version of U-Boot and the CFI driver rather than this
custom driver you are currently using
Regards,
Graeme
Oh, I use u-boot-1.1.4 or u-boot-1.2.0, I have compared them with the latest version, there is little difference.
I port AM29lV0404B driver on VxWorks into u-boot, AM29lV0404B driver on VxWorks works fine!
Best regard
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