I'm working on a mpc85xx board very similar to MPC8548CDS. I have 2 DIMMs and each one with it own spd eeprom and with only one chip select (cs0 and cs2). I'm trying to use two 1Gb DDR2s. My ddr configurations:
/* DDR Setup */ #define CONFIG_VERY_BIG_RAM #define CONFIG_FSL_DDR2 #undef CONFIG_FSL_DDR_INTERACTIVE #define CONFIG_SPD_EEPROM /* Use SPD EEPROM for DDR setup*/ #define CONFIG_DDR_SPD #define CONFIG_DDR_DLL /* possible DLL fix needed */
#define CONFIG_ECC_INIT_VIA_DDRCONTROLLER /* DDR controller or DMA? */ #define CONFIG_MEM_INIT_VALUE 0xDeadBeef
#define CONFIG_SYS_DDR_SDRAM_BASE 0x00000000 /* DDR is system memory*/ #define CONFIG_SYS_SDRAM_BASE CONFIG_SYS_DDR_SDRAM_BASE
#define CONFIG_NUM_DDR_CONTROLLERS 2 #define CONFIG_DIMM_SLOTS_PER_CTLR 1 #define CONFIG_CHIP_SELECTS_PER_CTRL 1
It seems you copy it from 8572, if you are using the 8548 like board, You should change it to #define CONFIG_NUM_DDR_CONTROLLERS 1 #define CONFIG_DIMM_SLOTS_PER_CTLR 2
/* I2C addresses of SPD EEPROMs */ #define SPD_EEPROM_ADDRESS1 0x51 /* CTLR 0 DIMM 0 */ #define SPD_EEPROM_ADDRESS2 0x53 /* CTLR 0 DIMM 1 */
Also, I'd changed my ddr.c as follow:
for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) { if (ctrl_num == 0) get_spd(&(ctrl_dimms_spd[i]), SPD_EEPROM_ADDRESS1); if (ctrl_num == 1) get_spd(&(ctrl_dimms_spd[i]), SPD_EEPROM_ADDRESS2); }and removing the ctrl_num checks that avoid ctrl_num = 1 access (in ddr.c and ddr-gen2.c). My board hangs after initialize the DDR:
You are bypassing the real problem. That is 8548 has only one DDR controller.
I2C: ready DRAM: Initializing 4294963200M left unmapped DDR: 2 GB
The tlb settings looks fine (debbug in setup_ddr_tlbs()):
ram_tlb_address: 0x0, ram_tlb_address: 0x0, ram_tlb_index: 0x8, tlb_size: 0xa ram_tlb_address: 0x40000000, ram_tlb_address: 0x40000000, ram_tlb_index: 0x9, tlb_size: 0xa
Am I missing some configuration?