Author: uwe Date: 2006-11-22 12:41:32 +0100 (Wed, 22 Nov 2006) New Revision: 2506
Modified: trunk/LinuxBIOSv2/src/include/spd.h trunk/LinuxBIOSv2/src/northbridge/intel/e7501/raminit.c Log: Update of the src/include/spd.h file with the following improvements:
* Added information on the relevant datasheet(s) and where to get them. * Added missing #defines for some other config bytes. * Documented all config bytes a bit better. * Renamed some #defines to hopefully make their names clearer.
(closes #38)
Signed-off-by: Uwe Hermann uwe@hermann-uwe.de Acked-by: Stefan Reinauer stepan@coresystems.de
Modified: trunk/LinuxBIOSv2/src/include/spd.h =================================================================== --- trunk/LinuxBIOSv2/src/include/spd.h 2006-11-22 00:29:51 UTC (rev 2505) +++ trunk/LinuxBIOSv2/src/include/spd.h 2006-11-22 11:41:32 UTC (rev 2506) @@ -1,8 +1,8 @@ /* - * spd.h: Definitions for Serial Presence Detect (SPD) data - * stored on SDRAM modules + * 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 @@ -16,66 +16,117 @@ * * 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 + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
-#ifndef __SPD_H_DEFINED -#define __SPD_H_DEFINED +/* + * 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 + */
-// Byte numbers -#define SPD_MEMORY_TYPE 2 -#define SPD_NUM_ROWS 3 -#define SPD_NUM_COLUMNS 4 -#define SPD_NUM_DIMM_BANKS 5 -#define SPD_MODULE_DATA_WIDTH_LSB 6 -#define SPD_MODULE_DATA_WIDTH_MSB 7 -#define SPD_MODULE_VOLTAGE 8 -#define SPD_MIN_CYCLE_TIME_AT_CAS_MAX 9 -#define SPD_DIMM_CONFIG_TYPE 11 -#define SPD_REFRESH 12 -#define SPD_PRIMARY_DRAM_WIDTH 13 -#define SPD_SUPPORTED_BURST_LENGTHS 16 -#define SPD_NUM_BANKS_PER_DRAM 17 -#define SPD_ACCEPTABLE_CAS_LATENCIES 18 -#define SPD_MODULE_ATTRIBUTES 21 -#define SPD_MIN_CYCLE_TIME_AT_CAS_REDUCED_05 23 -#define SPD_MIN_CYCLE_TIME_AT_CAS_REDUCED_10 25 -#define SPD_MIN_ROW_PRECHARGE_TIME 27 -#define SPD_MIN_RAS_TO_CAS_DELAY 29 -#define SPD_MIN_ACTIVE_TO_PRECHARGE_DELAY 30 -#define SPD_ADDRESS_CMD_HOLD 33 +#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 */
-// SPD_MEMORY_TYPE values -#define MEMORY_TYPE_SDRAM_DDR 7 +/* 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_SSTL2 4 +/* 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_DIMM_CONFIG_TYPE values. */ +#define ERROR_SCHEME_NONE 0 +#define ERROR_SCHEME_PARITY 1 +#define ERROR_SCHEME_ECC 2
-// SPD_ACCEPTABLE_CAS_LATENCIES 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_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_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
-// SPD_MODULE_ATTRIBUTES values -#define MODULE_BUFFERED 1 -#define MODULE_REGISTERED 2 +#endif /* _SPD_H_ */
-#endif // __SPD_H_DEFINED
Modified: trunk/LinuxBIOSv2/src/northbridge/intel/e7501/raminit.c =================================================================== --- trunk/LinuxBIOSv2/src/northbridge/intel/e7501/raminit.c 2006-11-22 00:29:51 UTC (rev 2505) +++ trunk/LinuxBIOSv2/src/northbridge/intel/e7501/raminit.c 2006-11-22 11:41:32 UTC (rev 2506) @@ -93,8 +93,8 @@ SPD_NUM_COLUMNS, SPD_NUM_ROWS, SPD_NUM_DIMM_BANKS, - SPD_PRIMARY_DRAM_WIDTH, - SPD_NUM_BANKS_PER_DRAM + SPD_PRIMARY_SDRAM_WIDTH, + SPD_NUM_BANKS_PER_SDRAM };
/* @@ -560,7 +560,7 @@ width.side1 = 0; width.side2 = 0;
- value = spd_read_byte(dimm_socket_address, SPD_PRIMARY_DRAM_WIDTH); + value = spd_read_byte(dimm_socket_address, SPD_PRIMARY_SDRAM_WIDTH); die_on_spd_error(value); width.side1 = value & 0x7f; // Mask off bank 2 flag @@ -625,7 +625,7 @@ sz.side2 += value; // Symmetric }
- value = spd_read_byte(dimm_socket_address, SPD_NUM_BANKS_PER_DRAM); + value = spd_read_byte(dimm_socket_address, SPD_NUM_BANKS_PER_SDRAM); die_on_spd_error(value);
value = log2(value); @@ -701,7 +701,7 @@ if (channel0_dimm == 0) continue; // No such socket on this mainboard
- if (spd_read_byte(channel0_dimm, SPD_MEMORY_TYPE) != MEMORY_TYPE_SDRAM_DDR) + if (spd_read_byte(channel0_dimm, SPD_MEMORY_TYPE) != SPD_MEMORY_TYPE_SDRAM_DDR) continue;
#ifdef VALIDATE_DIMM_COMPATIBILITY @@ -1325,7 +1325,7 @@
current_cas_latency >>= 1; if (current_cas_latency != 0) { - value = spd_read_byte(dimm_socket_address, SPD_MIN_CYCLE_TIME_AT_CAS_REDUCED_05); + value = spd_read_byte(dimm_socket_address, SPD_SDRAM_CYCLE_TIME_2ND); if(value < 0 ) goto hw_err; if(value > 0x75) dimm_compatible_cas_latencies &= ~current_cas_latency; @@ -1334,7 +1334,7 @@ // Can we support the next-highest CAS# latency (max - 1.0)? current_cas_latency >>= 1; if (current_cas_latency != 0) { - value = spd_read_byte(dimm_socket_address, SPD_MIN_CYCLE_TIME_AT_CAS_REDUCED_10); + value = spd_read_byte(dimm_socket_address, SPD_SDRAM_CYCLE_TIME_3RD); if(value < 0 ) goto hw_err; if(value > 0x75) dimm_compatible_cas_latencies &= ~current_cas_latency; @@ -1489,11 +1489,11 @@ #ifdef SUSPICIOUS_LOOKING_CODE // SJM NOTE: This code doesn't look right. SPD values are an order of magnitude smaller // than the clock period of the memory controller. Also, no other northbridge -// looks at SPD_ADDRESS_CMD_HOLD. +// looks at SPD_CMD_SIGNAL_INPUT_HOLD_TIME.
// Switch to 2 clocks for address/command if required by any one of the DIMMs // NOTE: At 133 MHz, 1 clock == 7.52 ns - value = spd_read_byte(dimm_socket_address, SPD_ADDRESS_CMD_HOLD); + value = spd_read_byte(dimm_socket_address, SPD_CMD_SIGNAL_INPUT_HOLD_TIME); die_on_spd_error(value); if(value >= 0xa0) { /* At 133MHz this constant should be 0x75 */ controller_mode &= ~(1<<16); /* Use two clock cyles instead of one */ @@ -1984,4 +1984,4 @@
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ /* PUBLIC INTERFACE */ -/**********************************************************************************/ \ No newline at end of file +/**********************************************************************************/
-
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