| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #ifndef __SPD_DDR2_H__ |
| #define __SPD_DDR2_H__ |
| |
| /* SPDs for DDR2 SDRAM */ |
| #define SPD_MEM_TYPE 2 |
| #define SPD_MEM_TYPE_SDRAM_DDR 0x07 |
| #define SPD_MEM_TYPE_SDRAM_DDR2 0x08 |
| |
| #define SPD_DIMM_TYPE 20 /* x bit0 or bit4 =1 mean registered*/ |
| #define SPD_DIMM_TYPE_RDIMM 0x01 |
| #define SPD_DIMM_TYPE_UDIMM 0x02 |
| #define SPD_DIMM_TYPE_SODIMM 0x04 |
| #define SPD_72B_SO_CDIMM 0x06 |
| #define SPD_72B_SO_RDIMM 0x07 |
| #define SPD_DIMM_TYPE_uDIMM 0x08 |
| #define SPD_DIMM_TYPE_mRDIMM 0x10 |
| #define SPD_DIMM_TYPE_mUDIMM 0x20 |
| |
| #define SPD_MOD_ATTRIB 21 |
| #define SPD_MOD_ATTRIB_DIFCK 0x20 |
| #define SPD_MOD_ATTRIB_REGADC 0x11 /* x */ |
| #define SPD_MOD_ATTRIB_PROBE 0x40 |
| |
| #define SPD_DEV_ATTRIB 22 /* Device attributes --- general */ |
| #define SPD_DIMM_CONF_TYPE 11 |
| #define SPD_DIMM_CONF_TYPE_ECC 0x02 |
| #define SPD_DIMM_CONF_TYPE_ADDR_PARITY 0x04 /* ? */ |
| |
| #define SPD_CAS_LAT_MIN_X_1 23 |
| #define SPD_CAS_LAT_MAX_X_1 24 |
| #define SPD_CAS_LAT_MIN_X_2 25 |
| #define SPD_CAS_LAT_MAX_X_2 26 |
| |
| #define SPD_BURST_LENGTHS 16 |
| #define SPD_BURST_LENGTHS_4 (1<<2) |
| #define SPD_BURST_LENGTHS_8 (1<<3) |
| |
| #define SPD_ROW_NUM 3 /* Number of Row addresses */ |
| #define SPD_COL_NUM 4 /* Number of Column addresses */ |
| #define SPD_BANK_NUM 17 /* SDRAM Device attributes - Number of Banks on |
| SDRAM device, it could be 0x4, 0x8, so address |
| lines for that would be 2, and 3 */ |
| |
| /* Number of Ranks bit [2:0], Package (bit4, 1 = stack, 0 = planar), |
| * Height bit[7:5] |
| */ |
| #define SPD_MOD_ATTRIB_RANK 5 |
| #define SPD_MOD_ATTRIB_RANK_NUM_SHIFT 0 |
| #define SPD_MOD_ATTRIB_RANK_NUM_MASK 0x07 |
| #define SPD_MOD_ATTRIB_RANK_NUM_BASE 1 |
| #define SPD_MOD_ATTRIB_RANK_NUM_MIN 1 |
| #define SPD_MOD_ATTRIB_RANK_NUM_MAX 8 |
| |
| #define SPD_RANK_SIZE 31 /* Only one bit is set */ |
| #define SPD_RANK_SIZE_1GB (1<<0) |
| #define SPD_RANK_SIZE_2GB (1<<1) |
| #define SPD_RANK_SIZE_4GB (1<<2) |
| #define SPD_RANK_SIZE_8GB (1<<3) |
| #define SPD_RANK_SIZE_16GB (1<<4) |
| #define SPD_RANK_SIZE_128MB (1<<5) |
| #define SPD_RANK_SIZE_256MB (1<<6) |
| #define SPD_RANK_SIZE_512MB (1<<7) |
| |
| /* valid value 0, 32, 33, 36, 64, 72, 80, 128, 144, 254, 255 */ |
| #define SPD_DATA_WIDTH 6 |
| /* Primary SDRAM Width, it could be 0x08 or 0x10 */ |
| #define SPD_PRI_WIDTH 13 |
| /* Error Checking SDRAM Width, it could be 0x08 or 0x10 */ |
| #define SPD_ERR_WIDTH 14 |
| |
| #define SPD_CAS_LAT 18 /* SDRAM Device Attributes -- CAS Latency */ |
| #define SPD_CAS_LAT_2 (1<<2) |
| #define SPD_CAS_LAT_3 (1<<3) |
| #define SPD_CAS_LAT_4 (1<<4) |
| #define SPD_CAS_LAT_5 (1<<5) |
| #define SPD_CAS_LAT_6 (1<<6) |
| #define SPD_CAS_LAT_7 (1<<7) |
| |
| /* bit [7:2] = 1-63 ns, bit [1:0] 0.25ns+, final value ((val>>2) |
| * + (val & 3) * 0.25)ns |
| */ |
| #define SPD_TRP 27 |
| #define SPD_TRRD 28 |
| #define SPD_TRCD 29 |
| #define SPD_TRAS 30 |
| #define SPD_TWR 36 /* x */ |
| #define SPD_TWTR 37 /* x */ |
| #define SPD_TRTP 38 /* x */ |
| |
| #define SPD_EX_TRC_TRFC 40 |
| /* add byte 0x40 bit [3:1] , so final val41+ table[((val40>>1) & 0x7)] |
| * ... table[]={0, 0.25, 0.33, 0.5, 0.75, 0, 0} |
| */ |
| #define SPD_TRC 41 |
| /* add byte 0x40 bit [6:4] , so final val42+ table[((val40>>4) & 0x7)] |
| * + (val40 & 1)*256 |
| */ |
| #define SPD_TRFC 42 |
| |
| #define SPD_TREF 12 |
| |
| #endif /* __SPD_DDR2_H__ */ |