| wdenk | db2f721 | 2003-03-06 00:58:30 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2003 Arabella Software Ltd. |
| 3 | * Yuli Barcohen <yuli@arabellasw.com> |
| 4 | * |
| 5 | * Serial Presence Detect (SPD) EEPROM format according to the |
| 6 | * Intel's PC SDRAM Serial Presence Detect (SPD) Specification, |
| 7 | * revision 1.2B, November 1999 |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License as |
| 11 | * published by the Free Software Foundation; either version 2 of the |
| 12 | * License, or (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 22 | */ |
| 23 | |
| 24 | #ifndef _SPD_H_ |
| 25 | #define _SPD_H_ |
| 26 | |
| 27 | typedef struct spd_eeprom_s { |
| 28 | unsigned char info_size; /* # of bytes written into serial memory */ |
| 29 | unsigned char chip_size; /* Total # of bytes of SPD memory device */ |
| 30 | unsigned char mem_type; /* Fundamental memory type (FPM, EDO, SDRAM...) */ |
| 31 | unsigned char nrow_addr; /* # of Row Addresses on this assembly */ |
| 32 | unsigned char ncol_addr; /* # of Column Addresses on this assembly */ |
| 33 | unsigned char nrows; /* # of Module Rows on this assembly */ |
| 34 | unsigned char dataw_lsb; /* Data Width of this assembly */ |
| 35 | unsigned char dataw_msb; /* ... Data Width continuation */ |
| 36 | unsigned char voltage; /* Voltage interface standard of this assembly */ |
| 37 | unsigned char clk_cycle; /* SDRAM Cycle time at CL=X */ |
| 38 | unsigned char clk_access; /* SDRAM Access from Clock at CL=X */ |
| 39 | unsigned char config; /* DIMM Configuration type (non-parity, ECC) */ |
| 40 | unsigned char refresh; /* Refresh Rate/Type */ |
| 41 | unsigned char primw; /* Primary SDRAM Width */ |
| 42 | unsigned char ecw; /* Error Checking SDRAM width */ |
| 43 | unsigned char min_delay; /* Min Clock Delay for Back to Back Random Address */ |
| 44 | unsigned char burstl; /* Burst Lengths Supported */ |
| 45 | unsigned char nbanks; /* # of Banks on Each SDRAM Device */ |
| 46 | unsigned char cas_lat; /* CAS# Latencies Supported */ |
| 47 | unsigned char cs_lat; /* CS# Latency */ |
| 48 | unsigned char write_lat; /* Write Latency (also called Write Recovery time) */ |
| 49 | unsigned char mod_attr; /* SDRAM Module Attributes */ |
| 50 | unsigned char dev_attr; /* SDRAM Device Attributes */ |
| 51 | unsigned char clk_cycle2; /* Min SDRAM Cycle time at CL=X-1 */ |
| 52 | unsigned char clk_access2; /* SDRAM Access from Clock at CL=X-1 */ |
| 53 | unsigned char clk_cycle3; /* Min SDRAM Cycle time at CL=X-2 */ |
| 54 | unsigned char clk_access3; /* Max SDRAM Access from Clock at CL=X-2 */ |
| 55 | unsigned char trp; /* Min Row Precharge Time (tRP) */ |
| 56 | unsigned char trrd; /* Min Row Active to Row Active (tRRD) */ |
| 57 | unsigned char trcd; /* Min RAS to CAS Delay (tRCD) */ |
| 58 | unsigned char tras; /* Minimum RAS Pulse Width (tRAS) */ |
| 59 | unsigned char row_dens; /* Density of each row on module */ |
| 60 | unsigned char ca_setup; /* Command and Address signal input setup time */ |
| 61 | unsigned char ca_hold; /* Command and Address signal input hold time */ |
| 62 | unsigned char data_setup; /* Data signal input setup time */ |
| 63 | unsigned char data_hold; /* Data signal input hold time */ |
| 64 | unsigned char sset[26]; /* Superset Information (may be used in future) */ |
| 65 | unsigned char spd_rev; /* SPD Data Revision Code */ |
| 66 | unsigned char cksum; /* Checksum for bytes 0-62 */ |
| 67 | unsigned char mid[8]; /* Manufacturer's JEDEC ID code per JEP-108E */ |
| 68 | unsigned char mloc; /* Manufacturing Location */ |
| 69 | unsigned char mpart[18]; /* Manufacturer's Part Number */ |
| 70 | unsigned char rev[2]; /* Revision Code */ |
| 71 | unsigned char mdate[2]; /* Manufacturing Date */ |
| 72 | unsigned char sernum[4]; /* Assembly Serial Number */ |
| 73 | unsigned char mspec[27]; /* Manufacturer Specific Data */ |
| 74 | unsigned char freq; /* Intel specification frequency */ |
| 75 | unsigned char intel_cas; /* Intel Specification CAS# Latency support */ |
| 76 | } spd_eeprom_t; |
| 77 | |
| 78 | #endif /* _SPD_H_ */ |