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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2005 Digital Design Corporation
* Copyright (C) 2006 Uwe Hermann <uwe@hermann-uwe.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
/*
* Serial Presence Detect (SPD) data stored on SDRAM modules.
*
* Datasheet:
* - Name: PC SDRAM Serial Presence Detect (SPD) Specification
* Revision 1.2A, December, 1997
* - PDF: http://www.intel.com/design/chipsets/memory/spdsd12a.pdf
*
* Datasheet (alternative):
* - Name: SERIAL PRESENCE DETECT STANDARD, General Standard
* JEDEC Standard No. 21-C
* Annex J: Serial Presence Detects for DDR2 SDRAM (Revision 1.3):
* - PDF: http://www.jedec.org/download/search/4_01_02_10R17.pdf
*/
#ifndef _SPD_H_
#define _SPD_H_
/* Byte numbers. */
#define SPD_NUM_MANUFACTURER_BYTES 0 /* Number of bytes used by module manufacturer */
#define SPD_TOTAL_SPD_MEMORY_SIZE 1 /* Total SPD memory size */
#define SPD_MEMORY_TYPE 2 /* (Fundamental) memory type */
#define SPD_NUM_ROWS 3 /* Number of row address bits */
#define SPD_NUM_COLUMNS 4 /* Number of column address bits */
#define SPD_NUM_DIMM_BANKS 5 /* Number of module rows (banks) */
#define SPD_MODULE_DATA_WIDTH_LSB 6 /* Module data width (LSB) */
#define SPD_MODULE_DATA_WIDTH_MSB 7 /* Module data width (MSB) */
#define SPD_MODULE_VOLTAGE 8 /* Module interface signal levels */
#define SPD_MIN_CYCLE_TIME_AT_CAS_MAX 9 /* SDRAM cycle time (highest CAS latency), RAS access time (tRAC) */
#define SPD_ACCESS_TIME_FROM_CLOCK 10 /* SDRAM access time from clock (highest CAS latency), CAS access time (Tac, tCAC) */
#define SPD_DIMM_CONFIG_TYPE 11 /* Module configuration type */
#define SPD_REFRESH 12 /* Refresh rate/type */
#define SPD_PRIMARY_SDRAM_WIDTH 13 /* SDRAM width (primary SDRAM) */
#define SPD_ERROR_CHECKING_SDRAM_WIDTH 14 /* Error checking SDRAM (data) width */
#define SPD_MIN_CLOCK_DELAY_B2B_RAND_COLUMN 15 /* SDRAM device attributes, minimum clock delay for back to back random column */
#define SPD_SUPPORTED_BURST_LENGTHS 16 /* SDRAM device attributes, burst lengths supported */
#define SPD_NUM_BANKS_PER_SDRAM 17 /* SDRAM device attributes, number of banks on SDRAM device */
#define SPD_ACCEPTABLE_CAS_LATENCIES 18 /* SDRAM device attributes, CAS latency */
#define SPD_CS_LATENCY 19 /* SDRAM device attributes, CS latency */
#define SPD_WE_LATENCY 20 /* SDRAM device attributes, WE latency */
#define SPD_MODULE_ATTRIBUTES 21 /* SDRAM module attributes */
#define SPD_DEVICE_ATTRIBUTES_GENERAL 22 /* SDRAM device attributes, general */
#define SPD_SDRAM_CYCLE_TIME_2ND 23 /* SDRAM cycle time (2nd highest CAS latency) */
#define SPD_ACCESS_TIME_FROM_CLOCK_2ND 24 /* SDRAM access from clock (2nd highest CAS latency) */
#define SPD_SDRAM_CYCLE_TIME_3RD 25 /* SDRAM cycle time (3rd highest CAS latency) */
#define SPD_ACCESS_TIME_FROM_CLOCK_3RD 26 /* SDRAM access from clock (3rd highest CAS latency) */
#define SPD_MIN_ROW_PRECHARGE_TIME 27 /* Minimum row precharge time (Trp) */
#define SPD_MIN_ROWACTIVE_TO_ROWACTIVE 28 /* Minimum row active to row active (Trrd) */
#define SPD_MIN_RAS_TO_CAS_DELAY 29 /* Minimum RAS to CAS delay (Trcd) */
#define SPD_MIN_ACTIVE_TO_PRECHARGE_DELAY 30 /* Minimum RAS pulse width (Tras) */
#define SPD_DENSITY_OF_EACH_ROW_ON_MODULE 31 /* Density of each row on module */
#define SPD_CMD_SIGNAL_INPUT_SETUP_TIME 32 /* Command and address signal input setup time */
#define SPD_CMD_SIGNAL_INPUT_HOLD_TIME 33 /* Command and address signal input hold time */
#define SPD_DATA_SIGNAL_INPUT_SETUP_TIME 34 /* Data signal input setup time */
#define SPD_DATA_SIGNAL_INPUT_HOLD_TIME 35 /* Data signal input hold time */
#define SPD_WRITE_RECOVERY_TIME 36 /* Write recovery time (tWR) */
#define SPD_INT_WRITE_TO_READ_DELAY 37 /* Internal write to read command delay (tWTR) */
#define SPD_INT_READ_TO_PRECHARGE_DELAY 38 /* Internal read to precharge command delay (tRTP) */
#define SPD_MEM_ANALYSIS_PROBE_PARAMS 39 /* Memory analysis probe characteristics */
#define SPD_BYTE_41_42_EXTENSION 40 /* Extension of byte 41 (tRC) and byte 42 (tRFC) */
#define SPD_MIN_ACT_TO_ACT_AUTO_REFRESH 41 /* Minimum active to active auto refresh (tRCmin) */
#define SPD_MIN_AUTO_REFRESH_TO_ACT 42 /* Minimum auto refresh to active/auto refresh (tRFC) */
#define SPD_MAX_DEVICE_CYCLE_TIME 43 /* Maximum device cycle time (tCKmax) */
#define SPD_MAX_DQS_DQ_SKEW 44 /* Maximum skew between DQS and DQ (tDQSQ) */
#define SPD_MAX_READ_DATAHOLD_SKEW 45 /* Maximum read data-hold skew factor (tQHS) */
#define SPD_PLL_RELOCK_TIME 46 /* PLL relock time */
#define SPD_SPD_DATA_REVISION_CODE 62 /* SPD data revision code */
#define SPD_CHECKSUM_FOR_BYTES_0_TO_62 63 /* Checksum for bytes 0-62 */
#define SPD_MANUFACTURER_JEDEC_ID_CODE 64 /* Manufacturer's JEDEC ID code, per EIA/JEP106 (bytes 64-71) */
#define SPD_MANUFACTURING_LOCATION 72 /* Manufacturing location */
#define SPD_MANUFACTURER_PART_NUMBER 73 /* Manufacturer's part number, in 6-bit ASCII (bytes 73-90) */
#define SPD_REVISION_CODE 91 /* Revision code (bytes 91-92) */
#define SPD_MANUFACTURING_DATE 93 /* Manufacturing date (byte 93: year, byte 94: week) */
#define SPD_ASSEMBLY_SERIAL_NUMBER 95 /* Assembly serial number (bytes 95-98) */
#define SPD_MANUFACTURER_SPECIFIC_DATA 99 /* Manufacturer specific data (bytes 99-125) */
#define SPD_INTEL_SPEC_FOR_FREQUENCY 126 /* Intel specification for frequency */
#define SPD_INTEL_SPEC_100_MHZ 127 /* Intel specification details for 100MHz support */
/* DRAM specifications use the following naming conventions for SPD locations */
#define SPD_tRP SPD_MIN_ROW_PRECHARGE_TIME
#define SPD_tRRD SPD_MIN_ROWACTIVE_TO_ROWACTIVE
#define SPD_tRCD SPD_MIN_RAS_TO_CAS_DELAY
#define SPD_tRAS SPD_MIN_ACTIVE_TO_PRECHARGE_DELAY
#define SPD_BANK_DENSITY SPD_DENSITY_OF_EACH_ROW_ON_MODULE
#define SPD_ADDRESS_CMD_HOLD SPD_CMD_SIGNAL_INPUT_HOLD_TIME
#define SPD_tRC 41 /* SDRAM Device Minimum Active to Active/Auto Refresh Time (tRC) */
#define SPD_tRFC 42 /* SDRAM Device Minimum Auto Refresh to Active/Auto Refresh (tRFC) */
/* SPD_MEMORY_TYPE values. */
enum spd_memory_type {
SPD_MEMORY_TYPE_UNDEFINED = 0x00,
SPD_MEMORY_TYPE_FPM_DRAM = 0x01,
SPD_MEMORY_TYPE_EDO = 0x02,
SPD_MEMORY_TYPE_PIPELINED_NIBBLE = 0x03,
SPD_MEMORY_TYPE_SDRAM = 0x04,
SPD_MEMORY_TYPE_MULTIPLEXED_ROM = 0x05,
SPD_MEMORY_TYPE_SGRAM_DDR = 0x06,
SPD_MEMORY_TYPE_SDRAM_DDR = 0x07,
SPD_MEMORY_TYPE_SDRAM_DDR2 = 0x08,
SPD_MEMORY_TYPE_FBDIMM_DDR2 = 0x09,
SPD_MEMORY_TYPE_FB_PROBE_DDR2 = 0x0a,
SPD_MEMORY_TYPE_SDRAM_DDR3 = 0x0b,
};
/* SPD_MODULE_VOLTAGE values. */
#define SPD_VOLTAGE_TTL 0 /* 5.0 Volt/TTL */
#define SPD_VOLTAGE_LVTTL 1 /* LVTTL */
#define SPD_VOLTAGE_HSTL 2 /* HSTL 1.5 */
#define SPD_VOLTAGE_SSTL3 3 /* SSTL 3.3 */
#define SPD_VOLTAGE_SSTL2 4 /* SSTL 2.5 */
#define SPD_VOLTAGE_SSTL1 5 /* SSTL 1.8 */
/* SPD_DIMM_CONFIG_TYPE values. */
#define ERROR_SCHEME_NONE 0
#define ERROR_SCHEME_PARITY 1
#define ERROR_SCHEME_ECC 2
/* SPD_ACCEPTABLE_CAS_LATENCIES values. */
// TODO: Check values.
#define SPD_CAS_LATENCY_1_0 0x01
#define SPD_CAS_LATENCY_1_5 0x02
#define SPD_CAS_LATENCY_2_0 0x04
#define SPD_CAS_LATENCY_2_5 0x08
#define SPD_CAS_LATENCY_3_0 0x10
#define SPD_CAS_LATENCY_3_5 0x20
#define SPD_CAS_LATENCY_4_0 0x40
#define SPD_CAS_LATENCY_DDR2_3 (1 << 3)
#define SPD_CAS_LATENCY_DDR2_4 (1 << 4)
#define SPD_CAS_LATENCY_DDR2_5 (1 << 5)
#define SPD_CAS_LATENCY_DDR2_6 (1 << 6)
#define SPD_CAS_LATENCY_DDR2_7 (1 << 7)
/* SPD_SUPPORTED_BURST_LENGTHS values. */
#define SPD_BURST_LENGTH_1 1
#define SPD_BURST_LENGTH_2 2
#define SPD_BURST_LENGTH_4 4
#define SPD_BURST_LENGTH_8 8
#define SPD_BURST_LENGTH_PAGE (1 << 7)
/* SPD_MODULE_ATTRIBUTES values. */
#define MODULE_BUFFERED 1
#define MODULE_REGISTERED 2
/* DIMM SPD addresses */
#define DIMM0 0x50
#define DIMM1 0x51
#define DIMM2 0x52
#define DIMM3 0x53
#define DIMM4 0x54
#define DIMM5 0x55
#define DIMM6 0x56
#define DIMM7 0x57
#define RC00 0
#define RC01 1
#define RC02 2
#define RC03 3
#define RC04 4
#define RC05 5
#define RC06 6
#define RC07 7
#define RC08 8
#define RC09 9
#define RC10 10
#define RC11 11
#define RC12 12
#define RC13 13
#define RC14 14
#define RC15 15
#define RC16 16
#define RC17 17
#define RC18 18
#define RC19 19
#define RC20 20
#define RC21 21
#define RC22 22
#define RC23 23
#define RC24 24
#define RC25 25
#define RC26 26
#define RC27 27
#define RC28 28
#define RC29 29
#define RC30 30
#define RC31 31
#define RC32 32
#define RC33 33
#define RC34 34
#define RC35 35
#define RC36 36
#define RC37 37
#define RC38 38
#define RC39 39
#define RC40 40
#define RC41 41
#define RC42 42
#define RC43 43
#define RC44 44
#define RC45 45
#define RC46 46
#define RC47 47
#define RC48 48
#define RC49 49
#define RC50 50
#define RC51 51
#define RC52 52
#define RC53 53
#define RC54 54
#define RC55 55
#define RC56 56
#define RC57 57
#define RC58 58
#define RC59 59
#define RC60 60
#define RC61 61
#define RC62 62
#define RC63 63
/* Byte 20: DIMM type information */
#define SPD_UNDEFINED 0x00
#define SPD_RDIMM 0x01
#define SPD_UDIMM 0x02
#define SPD_SODIMM 0x04
#define SPD_72B_SO_CDIMM 0x06
#define SPD_72B_SO_RDIMM 0x07
#define SPD_MICRO_DIMM 0x08
#define SPD_MINI_RDIMM 0x10
#define SPD_MINI_UDIMM 0x20
#endif
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