[U-Boot] DDR2 autocalibration failure on 460EX

Hi,

I have a custom board based on 460EX with 2G of soldered DDR2 SDRAM. The memory is arranged in 2 ranks, 0, and 1, each one having 1G. I've used AMCC DDR2 spreadsheet to configure SDRAM controller registers.

The problem is that autocalibration fails, debug messages show that min and max values are always zero. I've tried method A, but it seems to run indefinitely.

I run u-boot 2009.03. Below is my register configuration.

#define CONFIG_SYS_SDRAM_R0BAS 0x0000e000 #define CONFIG_SYS_SDRAM_R1BAS 0x1000e000 #define CONFIG_SYS_SDRAM_R2BAS 0x00000000 #define CONFIG_SYS_SDRAM_R3BAS 0x00000000 #define CONFIG_SYS_SDRAM_PLBADDULL 0x00000000 #define CONFIG_SYS_SDRAM_PLBADDUHB 0x00000008 #define CONFIG_SYS_SDRAM_CONF1LL 0x80001C80 #define CONFIG_SYS_SDRAM_CONF1HB 0x80001C80 #define CONFIG_SYS_SDRAM_CONFPATHB 0x18a68000

#define CONFIG_SYS_SDRAM0_MB0CF 0x00000701 #define CONFIG_SYS_SDRAM0_MB1CF 0x00000701 #define CONFIG_SYS_SDRAM0_MB2CF 0x00000000 #define CONFIG_SYS_SDRAM0_MB3CF 0x00000000 #define CONFIG_SYS_SDRAM0_MCOPT1 0x05322000 #define CONFIG_SYS_SDRAM0_MCOPT2 0x00000000

#define CONFIG_SYS_SDRAM0_MODT0 0x05000000 #define CONFIG_SYS_SDRAM0_MODT1 0x00000000 #define CONFIG_SYS_SDRAM0_MODT2 0x00000000 #define CONFIG_SYS_SDRAM0_MODT3 0x00000000 #define CONFIG_SYS_SDRAM0_CODT 0x02800021 #define CONFIG_SYS_SDRAM0_RTR 0x06180000

#define CONFIG_SYS_SDRAM0_INITPLR0 0xA8380000 #define CONFIG_SYS_SDRAM0_INITPLR1 0x81900400 #define CONFIG_SYS_SDRAM0_INITPLR2 0x81020000 #define CONFIG_SYS_SDRAM0_INITPLR3 0x81030000 #define CONFIG_SYS_SDRAM0_INITPLR4 0x81010004 #define CONFIG_SYS_SDRAM0_INITPLR5 0xE4000552 #define CONFIG_SYS_SDRAM0_INITPLR6 0x81900400 #define CONFIG_SYS_SDRAM0_INITPLR7 0x93880000 #define CONFIG_SYS_SDRAM0_INITPLR8 0x93880000 #define CONFIG_SYS_SDRAM0_INITPLR9 0x93880000 #define CONFIG_SYS_SDRAM0_INITPLR10 0x93880000 #define CONFIG_SYS_SDRAM0_INITPLR11 0x81000452 #define CONFIG_SYS_SDRAM0_INITPLR12 0x81000384 #define CONFIG_SYS_SDRAM0_INITPLR13 0x81000004 #define CONFIG_SYS_SDRAM0_INITPLR14 0x00000000 #define CONFIG_SYS_SDRAM0_INITPLR15 0x00000000

#define CONFIG_SYS_SDRAM0_RQDC 0x80000038 #define CONFIG_SYS_SDRAM0_RFDC 0x003f0000 #define CONFIG_SYS_SDRAM0_RDCC 0x00000000 #define CONFIG_SYS_SDRAM0_DLCR 0x00000000 #define CONFIG_SYS_SDRAM0_CLKTR 0x80000000 #define CONFIG_SYS_SDRAM0_WRDTR 0x83000800 #define CONFIG_SYS_SDRAM0_SDTR1 0x80201000 #define CONFIG_SYS_SDRAM0_SDTR2 0x32404232 #define CONFIG_SYS_SDRAM0_SDTR3 0x090b0d27 #define CONFIG_SYS_SDRAM0_MMODE 0x00000452 #define CONFIG_SYS_SDRAM0_MEMODE 0x00000004

#define CONFIG_SYS_MBYTES_SDRAM 2048

Any idea what could be the problem ?

Thanks a lot in advance.

Felix.