Author: rminnich Date: 2007-06-14 19:50:58 +0200 (Thu, 14 Jun 2007) New Revision: 352
Added: LinuxBIOSv3/include/spd.h Log: we need spd.h Signed-off-by: Ronald G. Minnich rminnich@gmail.com
Acked-by: Stefan Reinauer stepan@coresystems.de
Added: LinuxBIOSv3/include/spd.h =================================================================== --- LinuxBIOSv3/include/spd.h (rev 0) +++ LinuxBIOSv3/include/spd.h 2007-06-14 17:50:58 UTC (rev 352) @@ -0,0 +1,143 @@ +/* + * This file is part of the LinuxBIOS 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * 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 + * - PDF: http://www.jedec.org/download/search/4_01_02_00R9.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_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. */ +#define SPD_MEMORY_TYPE_FPM_DRAM 1 +#define SPD_MEMORY_TYPE_EDO 2 +#define SPD_MEMORY_TYPE_PIPELINED_NIBBLE 3 +#define SPD_MEMORY_TYPE_SDRAM 4 +#define SPD_MEMORY_TYPE_MULTIPLEXED_ROM 5 +#define SPD_MEMORY_TYPE_SGRAM_DDR 6 +#define SPD_MEMORY_TYPE_SDRAM_DDR 7 +#define SPD_MEMORY_TYPE_SDRAM_DDR2 8 + +/* 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 */ + +/* 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 + +/* 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 + +#endif /* _SPD_H_ */ +