Working fake SPD for DBE61C
Signed-off-by: Mart Raudsepp mart.raudsepp@artecdesign.ee
--- mainboard/artecgroup/dbe61/initram.c | 45 ++++++++++++++++++++------------- 1 files changed, 27 insertions(+), 18 deletions(-)
diff --git a/mainboard/artecgroup/dbe61/initram.c b/mainboard/artecgroup/dbe61/initram.c index 393d575..8c84792 100644 --- a/mainboard/artecgroup/dbe61/initram.c +++ b/mainboard/artecgroup/dbe61/initram.c @@ -38,31 +38,39 @@ #define DIMM0 ((u8) 0xA0) #define DIMM1 ((u8) 0xA2)
-/* The part is a Hynix hy5du121622ctp-d43. - * - * HY 5D U 12 16 2 2 C <blank> T <blank> P D43 - * Hynix - * DDR SDRAM (5D) - * VDD 2.5 VDDQ 2.5 (U) - * 512M 8K REFRESH (12) - * x16 (16) - * 4banks (2) - * SSTL_2 (2) - * 4th GEN die (C) - * Normal Power Consumption (<blank> ) - * TSOP (T) - * Single Die (<blank>) - * Lead Free (P) - * DDR400 3-3-3 (D43) - */ - struct spd_entry { u8 address; u8 data; };
/* Save space by using a short list of SPD values used by Geode LX Memory init */ +/* Fake SPD for DBE61C - 256MB. Same memory chip, and therefore same SPD entries, as for DBE62. */ +/* Micron MT46V32M16 */ static const struct spd_entry spd_table[] = { + {SPD_MEMORY_TYPE, 7}, + {SPD_NUM_ROWS, 13}, + {SPD_tRFC, 0x4b}, + {SPD_ACCEPTABLE_CAS_LATENCIES, 0x10}, + {SPD_DENSITY_OF_EACH_ROW_ON_MODULE, 0x40}, + {SPD_tRAS, 0x2d}, + {SPD_MIN_CYCLE_TIME_AT_CAS_MAX, 0x7}, /*0x <= 7},*/ + {SPD_MIN_RAS_TO_CAS_DELAY, 0x58}, + {SPD_tRRD, 0x3c}, + {SPD_tRP, 0x58}, + {SPD_PRIMARY_SDRAM_WIDTH, 8}, + {SPD_NUM_BANKS_PER_SDRAM, 0x4}, + {SPD_NUM_COLUMNS, 0xa}, /* 8kB */ + {SPD_NUM_DIMM_BANKS, 0x1}, + {SPD_REFRESH, 0x82}, + {SPD_SDRAM_CYCLE_TIME_2ND, 0x0}, + {SPD_SDRAM_CYCLE_TIME_3RD, 0x0}, + {SPD_tRCD, 15}, +}; + +#if 0 +/* Fake SPD for DBE61A - 128MB. Not working yet */ +/* Micron MT46V16M16 */ +static const struct spd_entry spd_table_dbe61a[] = { {SPD_ACCEPTABLE_CAS_LATENCIES, 0x10}, {SPD_BANK_DENSITY, 0x40}, {SPD_DEVICE_ATTRIBUTES_GENERAL, 0xff}, @@ -83,6 +91,7 @@ static const struct spd_entry spd_table[] = { {SPD_tRP, 15}, {SPD_tRRD, 10}, }; +#endif
/** * Given an SMBUS device, and an address in that device, return the value of SPD