On Wednesday, October 13, 2010, wind_embedded wind_embedded@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