[U-Boot] DDR RAM initialization

[raghavendra]

Dear All,

We are using MPC8548E (Rev 2.1) with on-board ddr2 of 512Mbytes.

The DDR initialization hangs when the u-boot comes up. We see MSRCID [2] an
input pin toggling.

The u-boot version is 2010.03 and DDR hangs by showing *** failed ***

****************************************************************************
*******************************************
U-Boot 2010.03 (Jun 22 2010 - 19:51:12)

CPU:   8548E, Version: 2.1, (0x80390021)
Core:  E500, Version: 2.2, (0x80210022)
Clock Configuration:
       CPU0:1000 MHz,
       CCB:400  MHz,
       DDR:200  MHz (400 MT/s data rate), LBC:25   MHz
L1:    D-cache 32 kB enabled
       I-cache 32 kB enabled
Board: 8548
I2C:   ready
DRAM:
DDR:cs0_bnds     = 0x0000001f
DDR:cs1_bnds     = 0x00000000
DDR:cs2_bnds     = 0x00000000
DDR:cs3_bnds     = 0x00000000
DDR: cs0_cfg   = 0x80044102
DDR: timing_cfg_0   = 0x00110105
DDR: timing_cfg_1   = 0x4c47a432
DDR: timing_cfg_2   = 0x331848ce
DDR: timing_cfg_3   = 0x00010000
DDR: sdram_cfg   = 0x83000008
DDR: sdram_cfg_2 = 0x04401000
DDR: sdram_mode  = 0x439e0642
DDR: sdram_mode_2  = 0x8000c000
DDR: ssdram_md_cntl   = 0x00000000
DDR: ssdram_interval  = 0x04100100
DDR: ssdram_data_init = 0x00000000
DDR: ssdram_clk_cntl  = 0x02800000
*** failed ***



The exact size is not printed by the u-boot. What could be the problem?

We went through the Register Configuration and also compared with register
values of working board. Both match.

Regards
Raghu