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include/ddr_spd.h
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/* * Copyright 2008 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * Version 2 as published by the Free Software Foundation. */ #ifndef _DDR_SPD_H_ #define _DDR_SPD_H_ /* * Format from "JEDEC Standard No. 21-C, * Appendix D: Rev 1.0: SPD's for DDR SDRAM */ typedef struct ddr1_spd_eeprom_s { unsigned char info_size; /* 0 # bytes written into serial memory */ unsigned char chip_size; /* 1 Total # bytes of SPD memory device */ unsigned char mem_type; /* 2 Fundamental memory type */ unsigned char nrow_addr; /* 3 # of Row Addresses on this assembly */ unsigned char ncol_addr; /* 4 # of Column Addrs on this assembly */ unsigned char nrows; /* 5 Number of DIMM Banks */ unsigned char dataw_lsb; /* 6 Data Width of this assembly */ unsigned char dataw_msb; /* 7 ... Data Width continuation */ unsigned char voltage; /* 8 Voltage intf std of this assembly */ unsigned char clk_cycle; /* 9 SDRAM Cycle time @ CL=X */ unsigned char clk_access; /* 10 SDRAM Access from Clk @ CL=X (tAC) */ unsigned char config; /* 11 DIMM Configuration type */ unsigned char refresh; /* 12 Refresh Rate/Type */ unsigned char primw; /* 13 Primary SDRAM Width */ unsigned char ecw; /* 14 Error Checking SDRAM width */ unsigned char min_delay; /* 15 for Back to Back Random Address */ unsigned char burstl; /* 16 Burst Lengths Supported */ unsigned char nbanks; /* 17 # of Banks on SDRAM Device */ unsigned char cas_lat; /* 18 CAS# Latencies Supported */ unsigned char cs_lat; /* 19 CS# Latency */ unsigned char write_lat; /* 20 Write Latency (aka Write Recovery) */ unsigned char mod_attr; /* 21 SDRAM Module Attributes */ unsigned char dev_attr; /* 22 SDRAM Device Attributes */ unsigned char clk_cycle2; /* 23 Min SDRAM Cycle time @ CL=X-0.5 */ unsigned char clk_access2; /* 24 SDRAM Access from |
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Clk @ CL=X-0.5 (tAC) */ |
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unsigned char clk_cycle3; /* 25 Min SDRAM Cycle time @ CL=X-1 */ unsigned char clk_access3; /* 26 Max Access from Clk @ CL=X-1 (tAC) */ unsigned char trp; /* 27 Min Row Precharge Time (tRP)*/ unsigned char trrd; /* 28 Min Row Active to Row Active (tRRD) */ unsigned char trcd; /* 29 Min RAS to CAS Delay (tRCD) */ unsigned char tras; /* 30 Minimum RAS Pulse Width (tRAS) */ unsigned char bank_dens; /* 31 Density of each bank on module */ unsigned char ca_setup; /* 32 Addr + Cmd Setup Time Before Clk */ unsigned char ca_hold; /* 33 Addr + Cmd Hold Time After Clk */ unsigned char data_setup; /* 34 Data Input Setup Time Before Strobe */ unsigned char data_hold; /* 35 Data Input Hold Time After Strobe */ unsigned char res_36_40[5];/* 36-40 reserved for VCSDRAM */ unsigned char trc; /* 41 Min Active to Auto refresh time tRC */ unsigned char trfc; /* 42 Min Auto to Active period tRFC */ unsigned char tckmax; /* 43 Max device cycle time tCKmax */ unsigned char tdqsq; /* 44 Max DQS to DQ skew (tDQSQ max) */ unsigned char tqhs; /* 45 Max Read DataHold skew (tQHS) */ unsigned char res_46; /* 46 Reserved */ unsigned char dimm_height; /* 47 DDR SDRAM DIMM Height */ unsigned char res_48_61[14]; /* 48-61 Reserved */ unsigned char spd_rev; /* 62 SPD Data Revision Code */ unsigned char cksum; /* 63 Checksum for bytes 0-62 */ unsigned char mid[8]; /* 64-71 Mfr's JEDEC ID code per JEP-106 */ unsigned char mloc; /* 72 Manufacturing Location */ unsigned char mpart[18]; /* 73 Manufacturer's Part Number */ unsigned char rev[2]; /* 91 Revision Code */ unsigned char mdate[2]; /* 93 Manufacturing Date */ unsigned char sernum[4]; /* 95 Assembly Serial Number */ unsigned char mspec[27]; /* 99-127 Manufacturer Specific Data */ } ddr1_spd_eeprom_t; /* * Format from "JEDEC Appendix X: Serial Presence Detects for DDR2 SDRAM", * SPD Revision 1.2 */ typedef struct ddr2_spd_eeprom_s { unsigned char info_size; /* 0 # bytes written into serial memory */ unsigned char chip_size; /* 1 Total # bytes of SPD memory device */ unsigned char mem_type; /* 2 Fundamental memory type */ unsigned char nrow_addr; /* 3 # of Row Addresses on this assembly */ unsigned char ncol_addr; /* 4 # of Column Addrs on this assembly */ unsigned char mod_ranks; /* 5 Number of DIMM Ranks */ unsigned char dataw; /* 6 Module Data Width */ unsigned char res_7; /* 7 Reserved */ unsigned char voltage; /* 8 Voltage intf std of this assembly */ unsigned char clk_cycle; /* 9 SDRAM Cycle time @ CL=X */ unsigned char clk_access; /* 10 SDRAM Access from Clk @ CL=X (tAC) */ unsigned char config; /* 11 DIMM Configuration type */ unsigned char refresh; /* 12 Refresh Rate/Type */ unsigned char primw; /* 13 Primary SDRAM Width */ unsigned char ecw; /* 14 Error Checking SDRAM width */ unsigned char res_15; /* 15 Reserved */ unsigned char burstl; /* 16 Burst Lengths Supported */ unsigned char nbanks; /* 17 # of Banks on Each SDRAM Device */ unsigned char cas_lat; /* 18 CAS# Latencies Supported */ unsigned char mech_char; /* 19 DIMM Mechanical Characteristics */ unsigned char dimm_type; /* 20 DIMM type information */ unsigned char mod_attr; /* 21 SDRAM Module Attributes */ unsigned char dev_attr; /* 22 SDRAM Device Attributes */ unsigned char clk_cycle2; /* 23 Min SDRAM Cycle time @ CL=X-1 */ unsigned char clk_access2; /* 24 SDRAM Access from Clk @ CL=X-1 (tAC) */ unsigned char clk_cycle3; /* 25 Min SDRAM Cycle time @ CL=X-2 */ unsigned char clk_access3; /* 26 Max Access from Clk @ CL=X-2 (tAC) */ unsigned char trp; /* 27 Min Row Precharge Time (tRP)*/ unsigned char trrd; /* 28 Min Row Active to Row Active (tRRD) */ unsigned char trcd; /* 29 Min RAS to CAS Delay (tRCD) */ unsigned char tras; /* 30 Minimum RAS Pulse Width (tRAS) */ unsigned char rank_dens; /* 31 Density of each rank on module */ unsigned char ca_setup; /* 32 Addr+Cmd Setup Time Before Clk (tIS) */ unsigned char ca_hold; /* 33 Addr+Cmd Hold Time After Clk (tIH) */ unsigned char data_setup; /* 34 Data Input Setup Time |
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Before Strobe (tDS) */ |
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unsigned char data_hold; /* 35 Data Input Hold Time |
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After Strobe (tDH) */ |
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unsigned char twr; /* 36 Write Recovery time tWR */ unsigned char twtr; /* 37 Int write to read delay tWTR */ unsigned char trtp; /* 38 Int read to precharge delay tRTP */ unsigned char mem_probe; /* 39 Mem analysis probe characteristics */ unsigned char trctrfc_ext; /* 40 Extensions to trc and trfc */ unsigned char trc; /* 41 Min Active to Auto refresh time tRC */ unsigned char trfc; /* 42 Min Auto to Active period tRFC */ unsigned char tckmax; /* 43 Max device cycle time tCKmax */ unsigned char tdqsq; /* 44 Max DQS to DQ skew (tDQSQ max) */ unsigned char tqhs; /* 45 Max Read DataHold skew (tQHS) */ unsigned char pll_relock; /* 46 PLL Relock time */ |
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unsigned char t_casemax; /* 47 Tcasemax */ unsigned char psi_ta_dram; /* 48 Thermal Resistance of DRAM Package from |
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Top (Case) to Ambient (Psi T-A DRAM) */ |
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unsigned char dt0_mode; /* 49 DRAM Case Temperature Rise from Ambient |
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(DT0/Mode Bits) */ unsigned char dt2n_dt2q; /* 50 DRAM Case Temperature Rise from Ambient |
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(DT2N/DT2Q) */ unsigned char dt2p; /* 51 DRAM Case Temperature Rise from Ambient |
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unsigned char dt3n; /* 52 DRAM Case Temperature Rise from Ambient |
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unsigned char dt3pfast; /* 53 DRAM Case Temperature Rise from Ambient |
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Fast PDN Exit (DT3Pfast) */ unsigned char dt3pslow; /* 54 DRAM Case Temperature Rise from Ambient |
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PDN Exit (DT3Pslow) */ unsigned char dt4r_dt4r4w; /* 55 DRAM Case Temperature Rise from Ambient |
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Mode Bit (DT4R/DT4R4W Mode Bit) */ unsigned char dt5b; /* 56 DRAM Case Temperature Rise from Ambient |
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unsigned char dt7; /* 57 DRAM Case Temperature Rise from Ambient |
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Auto-Precharge (DT7) */ |
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unsigned char psi_ta_pll; /* 58 Thermal Resistance of PLL Package form |
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unsigned char psi_ta_reg; /* 59 Thermal Reisitance of Register Package |
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from Top (Case) to Ambient |
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(Psi T-A Register) */ unsigned char dtpllactive; /* 60 PLL Case Temperature Rise from Ambient |
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unsigned char dtregact; /* 61 Register Case Temperature Rise from |
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(DT Register Active/Mode Bit) */ unsigned char spd_rev; /* 62 SPD Data Revision Code */ unsigned char cksum; /* 63 Checksum for bytes 0-62 */ unsigned char mid[8]; /* 64 Mfr's JEDEC ID code per JEP-106 */ unsigned char mloc; /* 72 Manufacturing Location */ unsigned char mpart[18]; /* 73 Manufacturer's Part Number */ unsigned char rev[2]; /* 91 Revision Code */ unsigned char mdate[2]; /* 93 Manufacturing Date */ unsigned char sernum[4]; /* 95 Assembly Serial Number */ unsigned char mspec[27]; /* 99-127 Manufacturer Specific Data */ } ddr2_spd_eeprom_t; typedef struct ddr3_spd_eeprom_s { /* General Section: Bytes 0-59 */ unsigned char info_size_crc; /* 0 # bytes written into serial memory, CRC coverage */ unsigned char spd_rev; /* 1 Total # bytes of SPD mem device */ unsigned char mem_type; /* 2 Key Byte / Fundamental mem type */ unsigned char module_type; /* 3 Key Byte / Module Type */ unsigned char density_banks; /* 4 SDRAM Density and Banks */ unsigned char addressing; /* 5 SDRAM Addressing */ |
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unsigned char module_vdd; /* 6 Module nominal voltage, VDD */ |
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unsigned char organization; /* 7 Module Organization */ unsigned char bus_width; /* 8 Module Memory Bus Width */ unsigned char ftb_div; /* 9 Fine Timebase (FTB) Dividend / Divisor */ unsigned char mtb_dividend; /* 10 Medium Timebase (MTB) Dividend */ unsigned char mtb_divisor; /* 11 Medium Timebase (MTB) Divisor */ |
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unsigned char tck_min; /* 12 SDRAM Minimum Cycle Time */ |
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unsigned char res_13; /* 13 Reserved */ unsigned char caslat_lsb; /* 14 CAS Latencies Supported, Least Significant Byte */ unsigned char caslat_msb; /* 15 CAS Latencies Supported, Most Significant Byte */ |
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unsigned char taa_min; /* 16 Min CAS Latency Time */ unsigned char twr_min; /* 17 Min Write REcovery Time */ unsigned char trcd_min; /* 18 Min RAS# to CAS# Delay Time */ unsigned char trrd_min; /* 19 Min Row Active to |
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Row Active Delay Time */ |
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unsigned char trp_min; /* 20 Min Row Precharge Delay Time */ unsigned char tras_trc_ext; /* 21 Upper Nibbles for tRAS and tRC */ unsigned char tras_min_lsb; /* 22 Min Active to Precharge |
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Delay Time */ |
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unsigned char trc_min_lsb; /* 23 Min Active to Active/Refresh |
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unsigned char trfc_min_lsb; /* 24 Min Refresh Recovery Delay Time */ unsigned char trfc_min_msb; /* 25 Min Refresh Recovery Delay Time */ unsigned char twtr_min; /* 26 Min Internal Write to |
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Read Command Delay Time */ |
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unsigned char trtp_min; /* 27 Min Internal Read to Precharge |
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Command Delay Time */ |
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unsigned char tfaw_msb; /* 28 Upper Nibble for tFAW */ unsigned char tfaw_min; /* 29 Min Four Activate Window |
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Delay Time*/ unsigned char opt_features; /* 30 SDRAM Optional Features */ unsigned char therm_ref_opt; /* 31 SDRAM Thermal and Refresh Opts */ |
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unsigned char therm_sensor; /* 32 Module Thermal Sensor */ unsigned char device_type; /* 33 SDRAM device type */ |
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int8_t fine_tck_min; /* 34 Fine offset for tCKmin */ int8_t fine_taa_min; /* 35 Fine offset for tAAmin */ int8_t fine_trcd_min; /* 36 Fine offset for tRCDmin */ int8_t fine_trp_min; /* 37 Fine offset for tRPmin */ int8_t fine_trc_min; /* 38 Fine offset for tRCmin */ |
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unsigned char res_39_59[21]; /* 39-59 Reserved, General Section */ |
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/* Module-Specific Section: Bytes 60-116 */ union { struct { /* 60 (Unbuffered) Module Nominal Height */ unsigned char mod_height; /* 61 (Unbuffered) Module Maximum Thickness */ unsigned char mod_thickness; /* 62 (Unbuffered) Reference Raw Card Used */ unsigned char ref_raw_card; /* 63 (Unbuffered) Address Mapping from Edge Connector to DRAM */ unsigned char addr_mapping; /* 64-116 (Unbuffered) Reserved */ unsigned char res_64_116[53]; } unbuffered; struct { /* 60 (Registered) Module Nominal Height */ unsigned char mod_height; /* 61 (Registered) Module Maximum Thickness */ unsigned char mod_thickness; /* 62 (Registered) Reference Raw Card Used */ unsigned char ref_raw_card; |
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/* 63 DIMM Module Attributes */ unsigned char modu_attr; /* 64 RDIMM Thermal Heat Spreader Solution */ unsigned char thermal; /* 65 Register Manufacturer ID Code, Least Significant Byte */ unsigned char reg_id_lo; /* 66 Register Manufacturer ID Code, Most Significant Byte */ unsigned char reg_id_hi; /* 67 Register Revision Number */ unsigned char reg_rev; /* 68 Register Type */ unsigned char reg_type; /* 69-76 RC1,3,5...15 (MS Nibble) / RC0,2,4...14 (LS Nibble) */ unsigned char rcw[8]; |
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} registered; unsigned char uc[57]; /* 60-116 Module-Specific Section */ } mod_section; /* Unique Module ID: Bytes 117-125 */ unsigned char mmid_lsb; /* 117 Module MfgID Code LSB - JEP-106 */ unsigned char mmid_msb; /* 118 Module MfgID Code MSB - JEP-106 */ unsigned char mloc; /* 119 Mfg Location */ unsigned char mdate[2]; /* 120-121 Mfg Date */ unsigned char sernum[4]; /* 122-125 Module Serial Number */ /* CRC: Bytes 126-127 */ unsigned char crc[2]; /* 126-127 SPD CRC */ /* Other Manufacturer Fields and User Space: Bytes 128-255 */ unsigned char mpart[18]; /* 128-145 Mfg's Module Part Number */ unsigned char mrev[2]; /* 146-147 Module Revision Code */ unsigned char dmid_lsb; /* 148 DRAM MfgID Code LSB - JEP-106 */ unsigned char dmid_msb; /* 149 DRAM MfgID Code MSB - JEP-106 */ unsigned char msd[26]; /* 150-175 Mfg's Specific Data */ unsigned char cust[80]; /* 176-255 Open for Customer Use */ } ddr3_spd_eeprom_t; extern unsigned int ddr1_spd_check(const ddr1_spd_eeprom_t *spd); extern void ddr1_spd_dump(const ddr1_spd_eeprom_t *spd); extern unsigned int ddr2_spd_check(const ddr2_spd_eeprom_t *spd); extern void ddr2_spd_dump(const ddr2_spd_eeprom_t *spd); |
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extern unsigned int ddr3_spd_check(const ddr3_spd_eeprom_t *spd); |
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/* * Byte 2 Fundamental Memory Types. */ #define SPD_MEMTYPE_FPM (0x01) #define SPD_MEMTYPE_EDO (0x02) #define SPD_MEMTYPE_PIPE_NIBBLE (0x03) #define SPD_MEMTYPE_SDRAM (0x04) #define SPD_MEMTYPE_ROM (0x05) #define SPD_MEMTYPE_SGRAM (0x06) #define SPD_MEMTYPE_DDR (0x07) #define SPD_MEMTYPE_DDR2 (0x08) #define SPD_MEMTYPE_DDR2_FBDIMM (0x09) #define SPD_MEMTYPE_DDR2_FBDIMM_PROBE (0x0A) #define SPD_MEMTYPE_DDR3 (0x0B) |
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/* DIMM Type for DDR2 SPD (according to v1.3) */ #define DDR2_SPD_DIMMTYPE_UNDEFINED (0x00) #define DDR2_SPD_DIMMTYPE_RDIMM (0x01) #define DDR2_SPD_DIMMTYPE_UDIMM (0x02) #define DDR2_SPD_DIMMTYPE_SO_DIMM (0x04) #define DDR2_SPD_DIMMTYPE_72B_SO_CDIMM (0x06) #define DDR2_SPD_DIMMTYPE_72B_SO_RDIMM (0x07) #define DDR2_SPD_DIMMTYPE_MICRO_DIMM (0x08) #define DDR2_SPD_DIMMTYPE_MINI_RDIMM (0x10) #define DDR2_SPD_DIMMTYPE_MINI_UDIMM (0x20) /* Byte 3 Key Byte / Module Type for DDR3 SPD */ #define DDR3_SPD_MODULETYPE_MASK (0x0f) #define DDR3_SPD_MODULETYPE_RDIMM (0x01) #define DDR3_SPD_MODULETYPE_UDIMM (0x02) #define DDR3_SPD_MODULETYPE_SO_DIMM (0x03) #define DDR3_SPD_MODULETYPE_MICRO_DIMM (0x04) #define DDR3_SPD_MODULETYPE_MINI_RDIMM (0x05) #define DDR3_SPD_MODULETYPE_MINI_UDIMM (0x06) |
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#define DDR3_SPD_MODULETYPE_MINI_CDIMM (0x07) #define DDR3_SPD_MODULETYPE_72B_SO_UDIMM (0x08) #define DDR3_SPD_MODULETYPE_72B_SO_RDIMM (0x09) #define DDR3_SPD_MODULETYPE_72B_SO_CDIMM (0x0A) #define DDR3_SPD_MODULETYPE_LRDIMM (0x0B) #define DDR3_SPD_MODULETYPE_16B_SO_DIMM (0x0C) #define DDR3_SPD_MODULETYPE_32B_SO_DIMM (0x0D) |
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#endif /* _DDR_SPD_H_ */ |