Add proper SPD definitions for DDR1/2/3
Also adds helper functions for DDR1/2 to verify the checksum. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
James Yang
Wolfgang Denk
parent
285db74716
commit
0f2cbe3f5e
@ -151,6 +151,7 @@ COBJS-y += cmd_mac.o
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COBJS-$(CONFIG_CMD_MFSL) += cmd_mfsl.o
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COBJS-$(CONFIG_MP) += cmd_mp.o
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COBJS-$(CONFIG_CMD_SF) += cmd_sf.o
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COBJS-$(CONFIG_DDR_SPD) += ddr_spd.o
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COBJS := $(COBJS-y)
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SRCS := $(AOBJS:.o=.S) $(COBJS:.o=.c)
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61
common/ddr_spd.c
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61
common/ddr_spd.c
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@ -0,0 +1,61 @@
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/*
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* Copyright 2008 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* Version 2 as published by the Free Software Foundation.
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*/
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#include <common.h>
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#include <ddr_spd.h>
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/* used for ddr1 and ddr2 spd */
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static int
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spd_check(const u8 *buf, u8 spd_rev, u8 spd_cksum)
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{
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unsigned int cksum = 0;
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unsigned int i;
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/*
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* Check SPD revision supported
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* Rev 1.2 or less supported by this code
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*/
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if (spd_rev > 0x12) {
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printf("SPD revision %02X not supported by this code\n",
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spd_rev);
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return 1;
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}
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/*
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* Calculate checksum
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*/
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for (i = 0; i < 63; i++) {
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cksum += *buf++;
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}
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cksum &= 0xFF;
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if (cksum != spd_cksum) {
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printf("SPD checksum unexpected. "
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"Checksum in SPD = %02X, computed SPD = %02X\n",
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spd_cksum, cksum);
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return 1;
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}
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return 0;
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}
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unsigned int
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ddr1_spd_check(const ddr1_spd_eeprom_t *spd)
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{
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const u8 *p = (const u8 *)spd;
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return spd_check(p, spd->spd_rev, spd->cksum);
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}
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unsigned int
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ddr2_spd_check(const ddr2_spd_eeprom_t *spd)
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{
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const u8 *p = (const u8 *)spd;
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return spd_check(p, spd->spd_rev, spd->cksum);
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}
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292
include/ddr_spd.h
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292
include/ddr_spd.h
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@ -0,0 +1,292 @@
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/*
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* Copyright 2008 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* Version 2 as published by the Free Software Foundation.
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*/
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#ifndef _DDR_SPD_H_
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#define _DDR_SPD_H_
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/*
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* Format from "JEDEC Standard No. 21-C,
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* Appendix D: Rev 1.0: SPD's for DDR SDRAM
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*/
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typedef struct ddr1_spd_eeprom_s {
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unsigned char info_size; /* 0 # bytes written into serial memory */
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unsigned char chip_size; /* 1 Total # bytes of SPD memory device */
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unsigned char mem_type; /* 2 Fundamental memory type */
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unsigned char nrow_addr; /* 3 # of Row Addresses on this assembly */
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unsigned char ncol_addr; /* 4 # of Column Addrs on this assembly */
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unsigned char nrows; /* 5 Number of DIMM Banks */
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unsigned char dataw_lsb; /* 6 Data Width of this assembly */
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unsigned char dataw_msb; /* 7 ... Data Width continuation */
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unsigned char voltage; /* 8 Voltage intf std of this assembly */
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unsigned char clk_cycle; /* 9 SDRAM Cycle time @ CL=X */
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unsigned char clk_access; /* 10 SDRAM Access from Clk @ CL=X (tAC) */
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unsigned char config; /* 11 DIMM Configuration type */
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unsigned char refresh; /* 12 Refresh Rate/Type */
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unsigned char primw; /* 13 Primary SDRAM Width */
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unsigned char ecw; /* 14 Error Checking SDRAM width */
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unsigned char min_delay; /* 15 for Back to Back Random Address */
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unsigned char burstl; /* 16 Burst Lengths Supported */
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unsigned char nbanks; /* 17 # of Banks on SDRAM Device */
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unsigned char cas_lat; /* 18 CAS# Latencies Supported */
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unsigned char cs_lat; /* 19 CS# Latency */
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unsigned char write_lat; /* 20 Write Latency (aka Write Recovery) */
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unsigned char mod_attr; /* 21 SDRAM Module Attributes */
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unsigned char dev_attr; /* 22 SDRAM Device Attributes */
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unsigned char clk_cycle2; /* 23 Min SDRAM Cycle time @ CL=X-0.5 */
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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 */
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unsigned char clk_access3; /* 26 Max Access from Clk @ CL=X-1 (tAC) */
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unsigned char trp; /* 27 Min Row Precharge Time (tRP)*/
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unsigned char trrd; /* 28 Min Row Active to Row Active (tRRD) */
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unsigned char trcd; /* 29 Min RAS to CAS Delay (tRCD) */
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unsigned char tras; /* 30 Minimum RAS Pulse Width (tRAS) */
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unsigned char bank_dens; /* 31 Density of each bank on module */
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unsigned char ca_setup; /* 32 Addr + Cmd Setup Time Before Clk */
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unsigned char ca_hold; /* 33 Addr + Cmd Hold Time After Clk */
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unsigned char data_setup; /* 34 Data Input Setup Time Before Strobe */
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unsigned char data_hold; /* 35 Data Input Hold Time After Strobe */
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unsigned char res_36_40[5];/* 36-40 reserved for VCSDRAM */
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unsigned char trc; /* 41 Min Active to Auto refresh time tRC */
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unsigned char trfc; /* 42 Min Auto to Active period tRFC */
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unsigned char tckmax; /* 43 Max device cycle time tCKmax */
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unsigned char tdqsq; /* 44 Max DQS to DQ skew (tDQSQ max) */
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unsigned char tqhs; /* 45 Max Read DataHold skew (tQHS) */
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unsigned char res_46; /* 46 Reserved */
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unsigned char dimm_height; /* 47 DDR SDRAM DIMM Height */
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unsigned char res_48_61[14]; /* 48-61 Reserved */
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unsigned char spd_rev; /* 62 SPD Data Revision Code */
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unsigned char cksum; /* 63 Checksum for bytes 0-62 */
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unsigned char mid[8]; /* 64-71 Mfr's JEDEC ID code per JEP-106 */
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unsigned char mloc; /* 72 Manufacturing Location */
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unsigned char mpart[18]; /* 73 Manufacturer's Part Number */
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unsigned char rev[2]; /* 91 Revision Code */
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unsigned char mdate[2]; /* 93 Manufacturing Date */
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unsigned char sernum[4]; /* 95 Assembly Serial Number */
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unsigned char mspec[27]; /* 99-127 Manufacturer Specific Data */
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} ddr1_spd_eeprom_t;
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/*
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* Format from "JEDEC Appendix X: Serial Presence Detects for DDR2 SDRAM",
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* SPD Revision 1.2
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*/
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typedef struct ddr2_spd_eeprom_s {
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unsigned char info_size; /* 0 # bytes written into serial memory */
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unsigned char chip_size; /* 1 Total # bytes of SPD memory device */
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unsigned char mem_type; /* 2 Fundamental memory type */
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unsigned char nrow_addr; /* 3 # of Row Addresses on this assembly */
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unsigned char ncol_addr; /* 4 # of Column Addrs on this assembly */
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unsigned char mod_ranks; /* 5 Number of DIMM Ranks */
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unsigned char dataw; /* 6 Module Data Width */
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unsigned char res_7; /* 7 Reserved */
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unsigned char voltage; /* 8 Voltage intf std of this assembly */
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unsigned char clk_cycle; /* 9 SDRAM Cycle time @ CL=X */
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unsigned char clk_access; /* 10 SDRAM Access from Clk @ CL=X (tAC) */
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unsigned char config; /* 11 DIMM Configuration type */
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unsigned char refresh; /* 12 Refresh Rate/Type */
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unsigned char primw; /* 13 Primary SDRAM Width */
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unsigned char ecw; /* 14 Error Checking SDRAM width */
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unsigned char res_15; /* 15 Reserved */
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unsigned char burstl; /* 16 Burst Lengths Supported */
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unsigned char nbanks; /* 17 # of Banks on Each SDRAM Device */
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unsigned char cas_lat; /* 18 CAS# Latencies Supported */
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unsigned char mech_char; /* 19 DIMM Mechanical Characteristics */
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unsigned char dimm_type; /* 20 DIMM type information */
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unsigned char mod_attr; /* 21 SDRAM Module Attributes */
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unsigned char dev_attr; /* 22 SDRAM Device Attributes */
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unsigned char clk_cycle2; /* 23 Min SDRAM Cycle time @ CL=X-1 */
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unsigned char clk_access2; /* 24 SDRAM Access from Clk @ CL=X-1 (tAC) */
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unsigned char clk_cycle3; /* 25 Min SDRAM Cycle time @ CL=X-2 */
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unsigned char clk_access3; /* 26 Max Access from Clk @ CL=X-2 (tAC) */
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unsigned char trp; /* 27 Min Row Precharge Time (tRP)*/
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unsigned char trrd; /* 28 Min Row Active to Row Active (tRRD) */
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unsigned char trcd; /* 29 Min RAS to CAS Delay (tRCD) */
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unsigned char tras; /* 30 Minimum RAS Pulse Width (tRAS) */
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unsigned char rank_dens; /* 31 Density of each rank on module */
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unsigned char ca_setup; /* 32 Addr+Cmd Setup Time Before Clk (tIS) */
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unsigned char ca_hold; /* 33 Addr+Cmd Hold Time After Clk (tIH) */
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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 */
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unsigned char twtr; /* 37 Int write to read delay tWTR */
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unsigned char trtp; /* 38 Int read to precharge delay tRTP */
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unsigned char mem_probe; /* 39 Mem analysis probe characteristics */
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unsigned char trctrfc_ext; /* 40 Extensions to trc and trfc */
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unsigned char trc; /* 41 Min Active to Auto refresh time tRC */
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unsigned char trfc; /* 42 Min Auto to Active period tRFC */
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unsigned char tckmax; /* 43 Max device cycle time tCKmax */
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unsigned char tdqsq; /* 44 Max DQS to DQ skew (tDQSQ max) */
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unsigned char tqhs; /* 45 Max Read DataHold skew (tQHS) */
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unsigned char pll_relock; /* 46 PLL Relock time */
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unsigned char Tcasemax; /* 47 Tcasemax */
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unsigned char psiTAdram; /* 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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due to Activate-Precharge/Mode Bits
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(DT0/Mode Bits) */
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unsigned char dt2n_dt2q; /* 50 DRAM Case Temperature Rise from Ambient
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due to Precharge/Quiet Standby
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(DT2N/DT2Q) */
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unsigned char dt2p; /* 51 DRAM Case Temperature Rise from Ambient
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due to Precharge Power-Down (DT2P) */
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unsigned char dt3n; /* 52 DRAM Case Temperature Rise from Ambient
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due to Active Standby (DT3N) */
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unsigned char dt3pfast; /* 53 DRAM Case Temperature Rise from Ambient
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due to Active Power-Down with
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Fast PDN Exit (DT3Pfast) */
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unsigned char dt3pslow; /* 54 DRAM Case Temperature Rise from Ambient
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due to Active Power-Down with Slow
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PDN Exit (DT3Pslow) */
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unsigned char dt4r_dt4r4w; /* 55 DRAM Case Temperature Rise from Ambient
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due to Page Open Burst Read/DT4R4W
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Mode Bit (DT4R/DT4R4W Mode Bit) */
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unsigned char dt5b; /* 56 DRAM Case Temperature Rise from Ambient
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due to Burst Refresh (DT5B) */
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unsigned char dt7; /* 57 DRAM Case Temperature Rise from Ambient
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due to Bank Interleave Reads with
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Auto-Precharge (DT7) */
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unsigned char psiTApll; /* 58 Thermal Resistance of PLL Package form
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Top (Case) to Ambient (Psi T-A PLL) */
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unsigned char psiTAreg; /* 59 Thermal Reisitance of Register Package
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from Top (Case) to Ambient
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(Psi T-A Register) */
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unsigned char dtpllactive; /* 60 PLL Case Temperature Rise from Ambient
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due to PLL Active (DT PLL Active) */
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unsigned char dtregact; /* 61 Register Case Temperature Rise from
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Ambient due to Register Active/Mode Bit
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(DT Register Active/Mode Bit) */
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unsigned char spd_rev; /* 62 SPD Data Revision Code */
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unsigned char cksum; /* 63 Checksum for bytes 0-62 */
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unsigned char mid[8]; /* 64 Mfr's JEDEC ID code per JEP-106 */
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unsigned char mloc; /* 72 Manufacturing Location */
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unsigned char mpart[18]; /* 73 Manufacturer's Part Number */
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unsigned char rev[2]; /* 91 Revision Code */
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unsigned char mdate[2]; /* 93 Manufacturing Date */
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unsigned char sernum[4]; /* 95 Assembly Serial Number */
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unsigned char mspec[27]; /* 99-127 Manufacturer Specific Data */
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} ddr2_spd_eeprom_t;
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typedef struct ddr3_spd_eeprom_s {
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/* General Section: Bytes 0-59 */
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unsigned char info_size_crc; /* 0 # bytes written into serial memory,
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CRC coverage */
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unsigned char spd_rev; /* 1 Total # bytes of SPD mem device */
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unsigned char mem_type; /* 2 Key Byte / Fundamental mem type */
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unsigned char module_type; /* 3 Key Byte / Module Type */
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unsigned char density_banks; /* 4 SDRAM Density and Banks */
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unsigned char addressing; /* 5 SDRAM Addressing */
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unsigned char res_6; /* 6 Reserved */
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unsigned char organization; /* 7 Module Organization */
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unsigned char bus_width; /* 8 Module Memory Bus Width */
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unsigned char ftb_div; /* 9 Fine Timebase (FTB)
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Dividend / Divisor */
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unsigned char mtb_dividend; /* 10 Medium Timebase (MTB) Dividend */
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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 */
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unsigned char caslat_lsb; /* 14 CAS Latencies Supported,
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Least Significant Byte */
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unsigned char caslat_msb; /* 15 CAS Latencies Supported,
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Most Significant Byte */
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unsigned char tAA_min; /* 16 Min CAS Latency Time */
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unsigned char tWR_min; /* 17 Min Write REcovery Time */
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unsigned char tRCD_min; /* 18 Min RAS# to CAS# Delay Time */
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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 */
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unsigned char tRAS_tRC_ext; /* 21 Upper Nibbles for tRAS and tRC */
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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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Delay Time, LSB */
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unsigned char tRFC_min_lsb; /* 24 Min Refresh Recovery Delay Time */
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unsigned char tRFC_min_msb; /* 25 Min Refresh Recovery Delay Time */
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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 */
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unsigned char tFAW_min; /* 29 Min Four Activate Window
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Delay Time*/
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unsigned char opt_features; /* 30 SDRAM Optional Features */
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unsigned char therm_ref_opt; /* 31 SDRAM Thermal and Refresh Opts */
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unsigned char res_32_59[28]; /* 32-59 Reserved, General Section */
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/* Module-Specific Section: Bytes 60-116 */
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union {
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struct {
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/* 60 (Unbuffered) Module Nominal Height */
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unsigned char mod_height;
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/* 61 (Unbuffered) Module Maximum Thickness */
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unsigned char mod_thickness;
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/* 62 (Unbuffered) Reference Raw Card Used */
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unsigned char ref_raw_card;
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/* 63 (Unbuffered) Address Mapping from
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Edge Connector to DRAM */
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unsigned char addr_mapping;
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/* 64-116 (Unbuffered) Reserved */
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unsigned char res_64_116[53];
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} unbuffered;
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struct {
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/* 60 (Registered) Module Nominal Height */
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unsigned char mod_height;
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/* 61 (Registered) Module Maximum Thickness */
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unsigned char mod_thickness;
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/* 62 (Registered) Reference Raw Card Used */
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unsigned char ref_raw_card;
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} registered;
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unsigned char uc[57]; /* 60-116 Module-Specific Section */
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} mod_section;
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/* Unique Module ID: Bytes 117-125 */
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unsigned char mmid_lsb; /* 117 Module MfgID Code LSB - JEP-106 */
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unsigned char mmid_msb; /* 118 Module MfgID Code MSB - JEP-106 */
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unsigned char mloc; /* 119 Mfg Location */
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unsigned char mdate[2]; /* 120-121 Mfg Date */
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unsigned char sernum[4]; /* 122-125 Module Serial Number */
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/* CRC: Bytes 126-127 */
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unsigned char crc[2]; /* 126-127 SPD CRC */
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/* Other Manufacturer Fields and User Space: Bytes 128-255 */
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unsigned char mpart[18]; /* 128-145 Mfg's Module Part Number */
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unsigned char mrev[2]; /* 146-147 Module Revision Code */
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unsigned char dmid_lsb; /* 148 DRAM MfgID Code LSB - JEP-106 */
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unsigned char dmid_msb; /* 149 DRAM MfgID Code MSB - JEP-106 */
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unsigned char msd[26]; /* 150-175 Mfg's Specific Data */
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unsigned char cust[80]; /* 176-255 Open for Customer Use */
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} ddr3_spd_eeprom_t;
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extern unsigned int ddr1_spd_check(const ddr1_spd_eeprom_t *spd);
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extern void ddr1_spd_dump(const ddr1_spd_eeprom_t *spd);
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extern unsigned int ddr2_spd_check(const ddr2_spd_eeprom_t *spd);
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extern void ddr2_spd_dump(const ddr2_spd_eeprom_t *spd);
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/*
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* Byte 2 Fundamental Memory Types.
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*/
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#define SPD_MEMTYPE_FPM (0x01)
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#define SPD_MEMTYPE_EDO (0x02)
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#define SPD_MEMTYPE_PIPE_NIBBLE (0x03)
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#define SPD_MEMTYPE_SDRAM (0x04)
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#define SPD_MEMTYPE_ROM (0x05)
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#define SPD_MEMTYPE_SGRAM (0x06)
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#define SPD_MEMTYPE_DDR (0x07)
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#define SPD_MEMTYPE_DDR2 (0x08)
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#define SPD_MEMTYPE_DDR2_FBDIMM (0x09)
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#define SPD_MEMTYPE_DDR2_FBDIMM_PROBE (0x0A)
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#define SPD_MEMTYPE_DDR3 (0x0B)
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#endif /* _DDR_SPD_H_ */
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