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184 lines
9.8 KiB
C
184 lines
9.8 KiB
C
/*
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* Copyright 2010 AsereBLN. All rights reserved. <aserebln@googlemail.com>
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*
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* spd.h
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*/
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#ifndef __LIBSAIO_SPD_H
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#define __LIBSAIO_SPD_H
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/*
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* Serial Presence Detect (SPD) data stored on SDRAM modules.
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*
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* Datasheet:
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* -- the link is broken!
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* - Name: PC SDRAM Serial Presence Detect (SPD) Specification
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* Revision 1.2A, December, 1997
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* - PDF: http://www.intel.com/design/chipsets/memory/spdsd12a.pdf
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*
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* Datasheet (alternative):
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* -- the link is not accessible without registration
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* - Name: SERIAL PRESENCE DETECT STANDARD, General Standard
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* JEDEC Standard No. 21-C
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* - PDF: http://www.jedec.org/download/search/4_01_02_00R9.PDF
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*/
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/* Byte numbers. */
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#define SPD_NUM_MANUFACTURER_BYTES 0 /* Number of bytes used by module manufacturer */
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#define SPD_TOTAL_SPD_MEMORY_SIZE 1 /* Total SPD memory size | Byte 1 (0x001): SPD Revision*/
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#define SPD_MEMORY_TYPE 2 /* (Fundamental) memory type */
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#define SPD_NUM_ROWS 3 /* Number of row address bits */
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#define SPD_NUM_COLUMNS 4 /* Number of column address bits */
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#define SPD_NUM_DIMM_BANKS 5 /* Number of module rows (banks) */
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#define SPD_MODULE_DATA_WIDTH_LSB 6 /* Module data width (LSB) */
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#define SPD_MODULE_DATA_WIDTH_MSB 7 /* Module data width (MSB) */
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#define SPD_MODULE_VOLTAGE 8 /* Module interface signal levels */
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#define SPD_MIN_CYCLE_TIME_AT_CAS_MAX 9 /* SDRAM cycle time (highest CAS latency), RAS access time (tRAC) */
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#define SPD_ACCESS_TIME_FROM_CLOCK 10 /* SDRAM access time from clock (highest CAS latency), CAS access time (Tac, tCAC) */
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#define SPD_DIMM_CONFIG_TYPE 11 /* Module configuration type */
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#define SPD_REFRESH 12 /* Refresh rate/type */
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#define SPD_PRIMARY_SDRAM_WIDTH 13 /* SDRAM width (primary SDRAM) */
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#define SPD_ERROR_CHECKING_SDRAM_WIDTH 14 /* Error checking SDRAM (data) width */
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#define SPD_MIN_CLOCK_DELAY_B2B_RAND_COLUMN 15 /* SDRAM device attributes, minimum clock delay for back to back random column */
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#define SPD_SUPPORTED_BURST_LENGTHS 16 /* SDRAM device attributes, burst lengths supported */
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#define SPD_NUM_BANKS_PER_SDRAM 17 /* SDRAM device attributes, number of banks on SDRAM device */
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#define SPD_ACCEPTABLE_CAS_LATENCIES 18 /* SDRAM device attributes, CAS latency */
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#define SPD_CS_LATENCY 19 /* SDRAM device attributes, CS latency */
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#define SPD_WE_LATENCY 20 /* SDRAM device attributes, WE latency */
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#define SPD_MODULE_ATTRIBUTES 21 /* SDRAM module attributes */
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#define SPD_DEVICE_ATTRIBUTES_GENERAL 22 /* SDRAM device attributes, general */
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#define SPD_SDRAM_CYCLE_TIME_2ND 23 /* SDRAM cycle time (2nd highest CAS latency) */
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#define SPD_ACCESS_TIME_FROM_CLOCK_2ND 24 /* SDRAM access from clock (2nd highest CAS latency) */
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#define SPD_SDRAM_CYCLE_TIME_3RD 25 /* SDRAM cycle time (3rd highest CAS latency) */
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#define SPD_ACCESS_TIME_FROM_CLOCK_3RD 26 /* SDRAM access from clock (3rd highest CAS latency) */
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#define SPD_MIN_ROW_PRECHARGE_TIME 27 /* Minimum row precharge time (Trp) */
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#define SPD_MIN_ROWACTIVE_TO_ROWACTIVE 28 /* Minimum row active to row active (Trrd) */
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#define SPD_MIN_RAS_TO_CAS_DELAY 29 /* Minimum RAS to CAS delay (Trcd) */
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#define SPD_MIN_ACTIVE_TO_PRECHARGE_DELAY 30 /* Minimum RAS pulse width (Tras) */
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#define SPD_DENSITY_OF_EACH_ROW_ON_MODULE 31 /* Density of each row on module */
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#define SPD_CMD_SIGNAL_INPUT_SETUP_TIME 32 /* Command and address signal input setup time */
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#define SPD_CMD_SIGNAL_INPUT_HOLD_TIME 33 /* Command and address signal input hold time */
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#define SPD_DATA_SIGNAL_INPUT_SETUP_TIME 34 /* Data signal input setup time */
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#define SPD_DATA_SIGNAL_INPUT_HOLD_TIME 35 /* Data signal input hold time */
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#define SPD_WRITE_RECOVERY_TIME 36 /* Write recovery time (tWR) */
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#define SPD_INT_WRITE_TO_READ_DELAY 37 /* Internal write to read command delay (tWTR) */
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#define SPD_INT_READ_TO_PRECHARGE_DELAY 38 /* Internal read to precharge command delay (tRTP) */
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#define SPD_MEM_ANALYSIS_PROBE_PARAMS 39 /* Memory analysis probe characteristics */
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#define SPD_BYTE_41_42_EXTENSION 40 /* Extension of byte 41 (tRC) and byte 42 (tRFC) */
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#define SPD_MIN_ACT_TO_ACT_AUTO_REFRESH 41 /* Minimum active to active auto refresh (tRCmin) */
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#define SPD_MIN_AUTO_REFRESH_TO_ACT 42 /* Minimum auto refresh to active/auto refresh (tRFC) */
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#define SPD_MAX_DEVICE_CYCLE_TIME 43 /* Maximum device cycle time (tCKmax) */
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#define SPD_MAX_DQS_DQ_SKEW 44 /* Maximum skew between DQS and DQ (tDQSQ) */
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#define SPD_MAX_READ_DATAHOLD_SKEW 45 /* Maximum read data-hold skew factor (tQHS) */
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#define SPD_PLL_RELOCK_TIME 46 /* PLL relock time */
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#define SPD_SPD_DATA_REVISION_CODE 62 /* SPD data revision code */
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#define SPD_CHECKSUM_FOR_BYTES_0_TO_62 63 /* Checksum for bytes 0-62 */
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#define SPD_MANUFACTURER_JEDEC_ID_CODE 64 /* Manufacturer's JEDEC ID code, per EIA/JEP106 (bytes 64-71) */
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#define SPD_MANUFACTURING_LOCATION 72 /* Manufacturing location */
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#define SPD_MANUFACTURER_PART_NUMBER 73 /* Manufacturer's part number, in 6-bit ASCII (bytes 73-90) */
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#define SPD_REVISION_CODE 91 /* Revision code (bytes 91-92) */
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#define SPD_MANUFACTURING_DATE 93 /* Manufacturing date (byte 93: year, byte 94: week) */
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#define SPD_ASSEMBLY_SERIAL_NUMBER 95 /* Assembly serial number (bytes 95-98) */
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#define SPD_MANUFACTURER_SPECIFIC_DATA 99 /* Manufacturer specific data (bytes 99-125) */
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#define SPD_INTEL_SPEC_FOR_FREQUENCY 126 /* Intel specification for frequency */
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#define SPD_INTEL_SPEC_100_MHZ 127 /* Intel specification details for 100MHz support */
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#define SPD_DDR3_MEMORY_BANK 0x75
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#define SPD_DDR3_MEMORY_CODE 0x76
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#define SPD_DDR4_MANUFACTURER_ID_BANK 0x140 /* Manufacturer's JEDEC ID code (bytes 140-141) */
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#define SPD_DDR4_MANUFACTURER_ID_CODE 0x141 /* Manufacturer's JEDEC ID code (bytes 140-141) */
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#define SPD_DDR4_MANUFACTURING_LOCATION 0x142 /* Manufacturing location */
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#define SPD_DDR4_MANUFACTURING_DATE 0x143 /* bytes 143-144 */
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#define SPD_DDR4_SERIAL_NUMBER 0x145 /* Assembly serial number (bytes 145-148) */
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#define SPD_DDR4_MANUFACTURER_PART_NUMBER 0x149 /* in 6-bit ASCII (bytes 149-15c) */
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#define SPD_DDR4_REVISION_CODE 0x15d /* Revision code */
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/* DRAM specifications use the following naming conventions for SPD locations */
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#define SPD_tRP SPD_MIN_ROW_PRECHARGE_TIME
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#define SPD_tRRD SPD_MIN_ROWACTIVE_TO_ROWACTIVE
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#define SPD_tRCD SPD_MIN_RAS_TO_CAS_DELAY
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#define SPD_tRAS SPD_MIN_ACTIVE_TO_PRECHARGE_DELAY
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#define SPD_BANK_DENSITY SPD_DENSITY_OF_EACH_ROW_ON_MODULE
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#define SPD_ADDRESS_CMD_HOLD SPD_CMD_SIGNAL_INPUT_HOLD_TIME
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#define SPD_tRC 41 /* SDRAM Device Minimum Active to Active/Auto Refresh Time (tRC) */
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#define SPD_tRFC 42 /* SDRAM Device Minimum Auto Refresh to Active/Auto Refresh (tRFC) */
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/* SPD_MEMORY_TYPE values. */
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#define SPD_MEMORY_TYPE_FPM_DRAM 1
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#define SPD_MEMORY_TYPE_EDO 2
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#define SPD_MEMORY_TYPE_PIPELINED_NIBBLE 3
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#define SPD_MEMORY_TYPE_SDRAM 4
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#define SPD_MEMORY_TYPE_MULTIPLEXED_ROM 5
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#define SPD_MEMORY_TYPE_SGRAM_DDR 6
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#define SPD_MEMORY_TYPE_SDRAM_DDR 7
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#define SPD_MEMORY_TYPE_SDRAM_DDR2 8
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#define SPD_MEMORY_TYPE_SDRAM_DDR2_FB_DIMM 9
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#define SPD_MEMORY_TYPE_SDRAM_DDR2_FB_PROBE 0xa
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#define SPD_MEMORY_TYPE_SDRAM_DDR3 0xb
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#define SPD_MEMORY_TYPE_SDRAM_DDR4 0xc
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/* SPD_MODULE_VOLTAGE values. */
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#define SPD_VOLTAGE_TTL 0 /* 5.0 Volt/TTL */
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#define SPD_VOLTAGE_LVTTL 1 /* LVTTL */
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#define SPD_VOLTAGE_HSTL 2 /* HSTL 1.5 */
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#define SPD_VOLTAGE_SSTL3 3 /* SSTL 3.3 */
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#define SPD_VOLTAGE_SSTL2 4 /* SSTL 2.5 */
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/* SPD_DIMM_CONFIG_TYPE values. */
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#define ERROR_SCHEME_NONE 0
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#define ERROR_SCHEME_PARITY 1
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#define ERROR_SCHEME_ECC 2
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/* SPD_ACCEPTABLE_CAS_LATENCIES values. */
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// TODO: Check values.
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#define SPD_CAS_LATENCY_1_0 0x01
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#define SPD_CAS_LATENCY_1_5 0x02
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#define SPD_CAS_LATENCY_2_0 0x04
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#define SPD_CAS_LATENCY_2_5 0x08
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#define SPD_CAS_LATENCY_3_0 0x10
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#define SPD_CAS_LATENCY_3_5 0x20
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#define SPD_CAS_LATENCY_4_0 0x40
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#define SPD_CAS_LATENCY_DDR2_3 (1 << 3)
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#define SPD_CAS_LATENCY_DDR2_4 (1 << 4)
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#define SPD_CAS_LATENCY_DDR2_5 (1 << 5)
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#define SPD_CAS_LATENCY_DDR2_6 (1 << 6)
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/* SPD_SUPPORTED_BURST_LENGTHS values. */
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#define SPD_BURST_LENGTH_1 1
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#define SPD_BURST_LENGTH_2 2
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#define SPD_BURST_LENGTH_4 4
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#define SPD_BURST_LENGTH_8 8
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#define SPD_BURST_LENGTH_PAGE (1 << 7)
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/* SPD_MODULE_ATTRIBUTES values. */
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#define MODULE_BUFFERED 1
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#define MODULE_REGISTERED 2
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//DDR4 specification
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/*
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Block 2, upper half: Manufacturing Information
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Bytes 320~383 (0x140~0x17F) The following table details the location of each byte in this block.
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Byte Number Function Described Notes
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320 0x140 Module Manufacturer’s ID Code, Least Significant Byte
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321 0x141 Module Manufacturer’s ID Code, Most Significant Byte
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322 0x142 Module Manufacturing Location
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323~324 0x143~0x144 Module Manufacturing Date
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325~328 0x145~0x148 Module Serial Number
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329~348 0x149~0x15C Module Part Number
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349 0x15D Module Revision Code
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350 0x15E DRAM Manufacturer’s ID Code, Least Significant Byte
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351 0x15F DRAM Manufacturer’s ID Code, Most Significant Byte
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352 0x160 DRAM Stepping
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353~381 0x161~0x17D Module Manufacturer’s Specific Data
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382~383 0x17E~0x17F Reserved; must be coded as 0x00
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*/
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void
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ScanSPD (void);
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#endif /* !__LIBSAIO_SPD_H */
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