This updates the ddr_spd.h header file from U-Boot-2019.01 with some
small changes:
- typedefs are removed
- "_s" suffix from struct types removed
- remove unnecessary "extern" from function declarations
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
arch/ppc/ddr-8xxx/ddr2_dimm_params.c | 6 +-
arch/ppc/ddr-8xxx/ddr3_dimm_params.c | 10 +-
arch/ppc/include/asm/fsl_ddr_sdram.h | 4 +-
common/ddr_spd.c | 122 ++++-
include/ddr_spd.h | 679 +++++++++++++++++++--------
5 files changed, 604 insertions(+), 217 deletions(-)
diff --git a/arch/ppc/ddr-8xxx/ddr2_dimm_params.c b/arch/ppc/ddr-8xxx/ddr2_dimm_params.c
index cc7f3fa6ba..22c05ca6da 100644
--- a/arch/ppc/ddr-8xxx/ddr2_dimm_params.c
+++ b/arch/ppc/ddr-8xxx/ddr2_dimm_params.c
@@ -190,13 +190,13 @@ uint32_t
compute_dimm_parameters(const generic_spd_eeprom_t *spdin,
struct dimm_params_s *pdimm)
{
- const struct ddr2_spd_eeprom_s *spd = spdin;
- uint32_t retval;
+ const struct ddr2_spd_eeprom *spd = spdin;
+ int retval;
if (spd->mem_type != SPD_MEMTYPE_DDR2)
goto error;
- retval = ddr2_spd_checksum_pass(spd);
+ retval = ddr2_spd_check(spd);
if (retval)
goto error;
diff --git a/arch/ppc/ddr-8xxx/ddr3_dimm_params.c b/arch/ppc/ddr-8xxx/ddr3_dimm_params.c
index d510c5b265..4f44925ab9 100644
--- a/arch/ppc/ddr-8xxx/ddr3_dimm_params.c
+++ b/arch/ppc/ddr-8xxx/ddr3_dimm_params.c
@@ -50,7 +50,7 @@
* 010 16bits
* 011 32bits
*/
-static uint64_t compute_ranksize(const struct ddr3_spd_eeprom_s *spd)
+static uint64_t compute_ranksize(const struct ddr3_spd_eeprom *spd)
{
uint64_t bsize;
int sdram_cap_bsize = 0, prim_bus_width = 0, sdram_width = 0;
@@ -78,14 +78,14 @@ uint32_t
compute_dimm_parameters(const generic_spd_eeprom_t *spdin,
struct dimm_params_s *pdimm)
{
- const struct ddr3_spd_eeprom_s *spd = spdin;
- uint32_t retval, mtb_ps;
- int ftb_tmp;
+ const struct ddr3_spd_eeprom *spd = spdin;
+ uint32_t mtb_ps;
+ int retval, ftb_tmp;
if (spd->mem_type != SPD_MEMTYPE_DDR3)
goto error;
- retval = ddr3_spd_checksum_pass(spd);
+ retval = ddr3_spd_check(spd);
if (retval)
goto error;
diff --git a/arch/ppc/include/asm/fsl_ddr_sdram.h b/arch/ppc/include/asm/fsl_ddr_sdram.h
index 2c45608e5d..f4732389f6 100644
--- a/arch/ppc/include/asm/fsl_ddr_sdram.h
+++ b/arch/ppc/include/asm/fsl_ddr_sdram.h
@@ -32,10 +32,10 @@
#define FSL_DDR_MIN_TCKE_PULSE_WIDTH_DDR (3)
#if defined(CONFIG_FSL_DDR2)
-typedef struct ddr2_spd_eeprom_s generic_spd_eeprom_t;
+typedef struct ddr2_spd_eeprom generic_spd_eeprom_t;
#define FSL_SDRAM_TYPE SDRAM_TYPE_DDR2
#elif defined(CONFIG_FSL_DDR3)
-typedef struct ddr3_spd_eeprom_s generic_spd_eeprom_t;
+typedef struct ddr3_spd_eeprom generic_spd_eeprom_t;
#define FSL_SDRAM_TYPE SDRAM_TYPE_DDR3
#endif
diff --git a/common/ddr_spd.c b/common/ddr_spd.c
index 2110972f5b..9394c57fa3 100644
--- a/common/ddr_spd.c
+++ b/common/ddr_spd.c
@@ -10,39 +10,65 @@
#include <crc.h>
#include <ddr_spd.h>
-uint32_t ddr2_spd_checksum_pass(const struct ddr2_spd_eeprom_s *spd)
+/* used for ddr1 and ddr2 spd */
+static int spd_check(const u8 *buf, u8 spd_rev, u8 spd_cksum)
{
- uint32_t i, cksum = 0;
- const uint8_t *buf = (const uint8_t *)spd;
- uint8_t rev, spd_cksum;
+ unsigned int cksum = 0;
+ unsigned int i;
- rev = spd->spd_rev;
- spd_cksum = spd->cksum;
-
- /* Rev 1.X or less supported by this code */
- if (rev >= 0x20)
- goto error;
+ /*
+ * Check SPD revision supported
+ * Rev 1.X or less supported by this code
+ */
+ if (spd_rev >= 0x20) {
+ printf("SPD revision %02X not supported by this code\n",
+ spd_rev);
+ return 1;
+ }
+ if (spd_rev > 0x13) {
+ printf("SPD revision %02X not verified by this code\n",
+ spd_rev);
+ }
/*
- * The checksum is calculated on the first 64 bytes
- * of the SPD as per JEDEC specification.
+ * Calculate checksum
*/
for (i = 0; i < 63; i++)
cksum += *buf++;
+
cksum &= 0xFF;
- if (cksum != spd_cksum)
- goto error;
+ if (cksum != spd_cksum) {
+ printf("SPD checksum unexpected. "
+ "Checksum in SPD = %02X, computed SPD = %02X\n",
+ spd_cksum, cksum);
+ return -EBADMSG;
+ }
return 0;
-error:
- return 1;
}
-uint32_t ddr3_spd_checksum_pass(const struct ddr3_spd_eeprom_s *spd)
+int ddr1_spd_check(const struct ddr1_spd_eeprom *spd)
{
- char crc_lsb, crc_msb;
- int csum16, len;
+ const u8 *p = (const u8 *)spd;
+
+ return spd_check(p, spd->spd_rev, spd->cksum);
+}
+
+int ddr2_spd_check(const struct ddr2_spd_eeprom *spd)
+{
+ const u8 *p = (const u8 *)spd;
+
+ return spd_check(p, spd->spd_rev, spd->cksum);
+}
+
+int ddr3_spd_check(const struct ddr3_spd_eeprom *spd)
+{
+ char *p = (char *)spd;
+ int csum16;
+ int len;
+ char crc_lsb; /* byte 126 */
+ char crc_msb; /* byte 127 */
/*
* SPD byte0[7] - CRC coverage
@@ -51,13 +77,61 @@ uint32_t ddr3_spd_checksum_pass(const struct ddr3_spd_eeprom_s *spd)
*/
len = !(spd->info_size_crc & 0x80) ? 126 : 117;
- csum16 = crc_itu_t(0, (char *)spd, len);
+ csum16 = crc_itu_t(0, p, len);
crc_lsb = (char) (csum16 & 0xff);
crc_msb = (char) (csum16 >> 8);
- if (spd->crc[0] != crc_lsb || spd->crc[1] != crc_msb)
- return 1;
+ if (spd->crc[0] == crc_lsb && spd->crc[1] == crc_msb) {
+ return 0;
+ } else {
+ printf("SPD checksum unexpected.\n"
+ "Checksum lsb in SPD = %02X, computed SPD = %02X\n"
+ "Checksum msb in SPD = %02X, computed SPD = %02X\n",
+ spd->crc[0], crc_lsb, spd->crc[1], crc_msb);
+ return -EBADMSG;
+ }
+}
+
+int ddr4_spd_check(const struct ddr4_spd_eeprom *spd)
+{
+ char *p = (char *)spd;
+ int csum16;
+ int len;
+ char crc_lsb; /* byte 126 */
+ char crc_msb; /* byte 127 */
+
+ len = 126;
+ csum16 = crc_itu_t(0, p, len);
+
+ crc_lsb = (char) (csum16 & 0xff);
+ crc_msb = (char) (csum16 >> 8);
+
+ if (spd->crc[0] != crc_lsb || spd->crc[1] != crc_msb) {
+ printf("SPD checksum unexpected.\n"
+ "Checksum lsb in SPD = %02X, computed SPD = %02X\n"
+ "Checksum msb in SPD = %02X, computed SPD = %02X\n",
+ spd->crc[0], crc_lsb, spd->crc[1], crc_msb);
+ return -EBADMSG;
+ }
+
+ p = (char *)((ulong)spd + 128);
+ len = 126;
+ csum16 = crc_itu_t(0, p, len);
+
+ crc_lsb = (char) (csum16 & 0xff);
+ crc_msb = (char) (csum16 >> 8);
+
+ if (spd->mod_section.uc[126] != crc_lsb ||
+ spd->mod_section.uc[127] != crc_msb) {
+ printf("SPD checksum unexpected.\n"
+ "Checksum lsb in SPD = %02X, computed SPD = %02X\n"
+ "Checksum msb in SPD = %02X, computed SPD = %02X\n",
+ spd->mod_section.uc[126],
+ crc_lsb, spd->mod_section.uc[127],
+ crc_msb);
+ return -EBADMSG;
+ }
return 0;
}
@@ -172,7 +246,7 @@ void ddr_spd_print(uint8_t *record)
int ctime;
uint8_t parity;
char *ref, *sum;
- struct ddr2_spd_eeprom_s *s = (struct ddr2_spd_eeprom_s *)record;
+ struct ddr2_spd_eeprom *s = (struct ddr2_spd_eeprom *)record;
if (s->mem_type != SPD_MEMTYPE_DDR2) {
printf("Can't dump information for non-DDR2 memory\n");
@@ -201,7 +275,7 @@ void ddr_spd_print(uint8_t *record)
}
}
- if (ddr2_spd_checksum_pass(s))
+ if (ddr2_spd_check(s))
sum = "ERR";
else
sum = "OK";
diff --git a/include/ddr_spd.h b/include/ddr_spd.h
index 01fe73c615..051275141f 100644
--- a/include/ddr_spd.h
+++ b/include/ddr_spd.h
@@ -1,242 +1,520 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
- * 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.
+ * Copyright 2008-2014 Freescale Semiconductor, Inc.
*/
#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
+ */
+struct ddr1_spd_eeprom {
+ 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
+ Clk @ CL=X-0.5 (tAC) */
+ 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 */
+
+};
+
/*
* Format from "JEDEC Appendix X: Serial Presence Detects for DDR2 SDRAM",
* SPD Revision 1.2
*/
-struct ddr2_spd_eeprom_s {
- uint8_t info_size; /* 0 # bytes written into serial memory */
- uint8_t chip_size; /* 1 Total # bytes of SPD memory device */
- uint8_t mem_type; /* 2 Fundamental memory type */
- uint8_t nrow_addr; /* 3 # of Row Addresses on this assembly */
- uint8_t ncol_addr; /* 4 # of Column Addrs on this assembly */
- uint8_t mod_ranks; /* 5 Number of DIMM Ranks */
- uint8_t dataw; /* 6 Module Data Width */
- uint8_t res_7; /* 7 Reserved */
- uint8_t voltage; /* 8 Voltage intf std of this assembly */
- uint8_t clk_cycle; /* 9 SDRAM Cycle time @ CL=X */
- uint8_t clk_access; /* 10 SDRAM Access from Clk @ CL=X (tAC) */
- uint8_t config; /* 11 DIMM Configuration type */
- uint8_t refresh; /* 12 Refresh Rate/Type */
- uint8_t primw; /* 13 Primary SDRAM Width */
- uint8_t ecw; /* 14 Error Checking SDRAM width */
- uint8_t res_15; /* 15 Reserved */
- uint8_t burstl; /* 16 Burst Lengths Supported */
- uint8_t nbanks; /* 17 # of Banks on Each SDRAM Device */
- uint8_t cas_lat; /* 18 CAS# Latencies Supported */
- uint8_t mech_char; /* 19 DIMM Mechanical Characteristics */
- uint8_t dimm_type; /* 20 DIMM type information */
- uint8_t mod_attr; /* 21 SDRAM Module Attributes */
- uint8_t dev_attr; /* 22 SDRAM Device Attributes */
- uint8_t clk_cycle2; /* 23 Min SDRAM Cycle time @ CL=X-1 */
- uint8_t clk_access2; /* 24 SDRAM Access from Clk @ CL=X-1 (tAC) */
- uint8_t clk_cycle3; /* 25 Min SDRAM Cycle time @ CL=X-2 */
- uint8_t clk_access3; /* 26 Max Access from Clk @ CL=X-2 (tAC) */
- uint8_t trp; /* 27 Min Row Precharge Time (tRP)*/
- uint8_t trrd; /* 28 Min Row Active to Row Active (tRRD) */
- uint8_t trcd; /* 29 Min RAS to CAS Delay (tRCD) */
- uint8_t tras; /* 30 Minimum RAS Pulse Width (tRAS) */
- uint8_t rank_dens; /* 31 Density of each rank on module */
- uint8_t ca_setup; /* 32 Addr+Cmd Setup Time Before Clk (tIS) */
- uint8_t ca_hold; /* 33 Addr+Cmd Hold Time After Clk (tIH) */
- uint8_t data_setup; /* 34 Data Input Setup Time Before Strobe
- (tDS) */
- uint8_t data_hold; /* 35 Data Input Hold Time
- After Strobe (tDH) */
- uint8_t twr; /* 36 Write Recovery time tWR */
- uint8_t twtr; /* 37 Int write to read delay tWTR */
- uint8_t trtp; /* 38 Int read to precharge delay tRTP */
- uint8_t mem_probe; /* 39 Mem analysis probe characteristics */
- uint8_t trctrfc_ext; /* 40 Extensions to trc and trfc */
- uint8_t trc; /* 41 Min Active to Auto refresh time tRC */
- uint8_t trfc; /* 42 Min Auto to Active period tRFC */
- uint8_t tckmax; /* 43 Max device cycle time tCKmax */
- uint8_t tdqsq; /* 44 Max DQS to DQ skew (tDQSQ max) */
- uint8_t tqhs; /* 45 Max Read DataHold skew (tQHS) */
- uint8_t pll_relock; /* 46 PLL Relock time */
- uint8_t Tcasemax; /* 47 Tcasemax */
- uint8_t psiTAdram; /* 48 Thermal Resistance of DRAM Package
- from Top (Case) to Ambient
- (Psi T-A DRAM) */
- uint8_t dt0_mode; /* 49 DRAM Case Temperature Rise from
- Ambient due to Activate-Precharge/Mode
- Bits (DT0/Mode Bits) */
- uint8_t dt2n_dt2q; /* 50 DRAM Case Temperature Rise from
- Ambient due to Precharge/Quiet Standby
- (DT2N/DT2Q) */
- uint8_t dt2p; /* 51 DRAM Case Temperature Rise from
- Ambient due to Precharge Power-Down
- (DT2P) */
- uint8_t dt3n; /* 52 DRAM Case Temperature Rise from
- Ambient due to Active Standby (DT3N) */
- uint8_t dt3pfast; /* 53 DRAM Case Temperature Rise from
- Ambient due to Active Power-Down with
- Fast PDN Exit (DT3Pfast) */
- uint8_t dt3pslow; /* 54 DRAM Case Temperature Rise from
- Ambient due to Active Power-Down with
- Slow PDN Exit (DT3Pslow) */
- uint8_t dt4r_dt4r4w; /* 55 DRAM Case Temperature Rise from
- Ambient due to Page Open Burst
- Read/DT4R4W Mode Bit
- (DT4R/DT4R4W Mode Bit) */
- uint8_t dt5b; /* 56 DRAM Case Temperature Rise from
- Ambient due to Burst Refresh (DT5B) */
- uint8_t dt7; /* 57 DRAM Case Temperature Rise from
- Ambient due to Bank Interleave Reads
- with Auto-Precharge (DT7) */
- uint8_t psiTApll; /* 58 Thermal Resistance of PLL Package
- form Top (Case) to Ambient
- (Psi T-A PLL) */
- uint8_t psiTAreg; /* 59 Thermal Reisitance of Register
- Package from Top (Case) to Ambient
- (Psi T-A Register) */
- uint8_t dtpllactive; /* 60 PLL Case Temperature Rise from
- Ambient due to PLL Active
- (DT PLL Active) */
- uint8_t dtregact; /* 61 Register Case Temperature Rise from
- Ambient due to Register Active/Mode
- Bit (DT Register Active/Mode Bit) */
- uint8_t spd_rev; /* 62 SPD Data Revision Code */
- uint8_t cksum; /* 63 Checksum for bytes 0-62 */
- uint8_t mid[8]; /* 64 Mfr's JEDEC ID code per JEP-106 */
- uint8_t mloc; /* 72 Manufacturing Location */
- uint8_t mpart[18]; /* 73 Manufacturer's Part Number */
- uint8_t rev[2]; /* 91 Revision Code */
- uint8_t mdate[2]; /* 93 Manufacturing Date */
- uint8_t sernum[4]; /* 95 Assembly Serial Number */
- uint8_t mspec[27]; /* 99-127 Manufacturer Specific Data */
+struct ddr2_spd_eeprom {
+ 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
+ Before Strobe (tDS) */
+ unsigned char data_hold; /* 35 Data Input Hold Time
+ After Strobe (tDH) */
+ 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 */
+ unsigned char t_casemax; /* 47 Tcasemax */
+ unsigned char psi_ta_dram; /* 48 Thermal Resistance of DRAM Package from
+ Top (Case) to Ambient (Psi T-A DRAM) */
+ unsigned char dt0_mode; /* 49 DRAM Case Temperature Rise from Ambient
+ due to Activate-Precharge/Mode Bits
+ (DT0/Mode Bits) */
+ unsigned char dt2n_dt2q; /* 50 DRAM Case Temperature Rise from Ambient
+ due to Precharge/Quiet Standby
+ (DT2N/DT2Q) */
+ unsigned char dt2p; /* 51 DRAM Case Temperature Rise from Ambient
+ due to Precharge Power-Down (DT2P) */
+ unsigned char dt3n; /* 52 DRAM Case Temperature Rise from Ambient
+ due to Active Standby (DT3N) */
+ unsigned char dt3pfast; /* 53 DRAM Case Temperature Rise from Ambient
+ due to Active Power-Down with
+ Fast PDN Exit (DT3Pfast) */
+ unsigned char dt3pslow; /* 54 DRAM Case Temperature Rise from Ambient
+ due to Active Power-Down with Slow
+ PDN Exit (DT3Pslow) */
+ unsigned char dt4r_dt4r4w; /* 55 DRAM Case Temperature Rise from Ambient
+ due to Page Open Burst Read/DT4R4W
+ Mode Bit (DT4R/DT4R4W Mode Bit) */
+ unsigned char dt5b; /* 56 DRAM Case Temperature Rise from Ambient
+ due to Burst Refresh (DT5B) */
+ unsigned char dt7; /* 57 DRAM Case Temperature Rise from Ambient
+ due to Bank Interleave Reads with
+ Auto-Precharge (DT7) */
+ unsigned char psi_ta_pll; /* 58 Thermal Resistance of PLL Package form
+ Top (Case) to Ambient (Psi T-A PLL) */
+ unsigned char psi_ta_reg; /* 59 Thermal Reisitance of Register Package
+ from Top (Case) to Ambient
+ (Psi T-A Register) */
+ unsigned char dtpllactive; /* 60 PLL Case Temperature Rise from Ambient
+ due to PLL Active (DT PLL Active) */
+ unsigned char dtregact; /* 61 Register Case Temperature Rise from
+ Ambient due to Register Active/Mode Bit
+ (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 */
+
};
-struct ddr3_spd_eeprom_s {
+struct ddr3_spd_eeprom {
/* General Section: Bytes 0-59 */
- uint8_t info_size_crc; /* 0 # bytes written into serial memory,
+ unsigned char info_size_crc; /* 0 # bytes written into serial memory,
CRC coverage */
- uint8_t spd_rev; /* 1 Total # bytes of SPD mem device */
- uint8_t mem_type; /* 2 Key Byte / Fundamental mem type */
- uint8_t module_type; /* 3 Key Byte / Module Type */
- uint8_t density_banks; /* 4 SDRAM Density and Banks */
- uint8_t addressing; /* 5 SDRAM Addressing */
- uint8_t module_vdd; /* 6 Module nominal voltage, VDD */
- uint8_t organization; /* 7 Module Organization */
- uint8_t bus_width; /* 8 Module Memory Bus Width */
- uint8_t ftb_div; /* 9 Fine Timebase (FTB)
+ 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 */
+ unsigned char module_vdd; /* 6 Module nominal voltage, VDD */
+ 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 */
- uint8_t mtb_dividend; /* 10 Medium Timebase (MTB) Dividend */
- uint8_t mtb_divisor; /* 11 Medium Timebase (MTB) Divisor */
- uint8_t tck_min; /* 12 SDRAM Minimum Cycle Time */
- uint8_t res_13; /* 13 Reserved */
- uint8_t caslat_lsb; /* 14 CAS Latencies Supported,
+ unsigned char mtb_dividend; /* 10 Medium Timebase (MTB) Dividend */
+ unsigned char mtb_divisor; /* 11 Medium Timebase (MTB) Divisor */
+ unsigned char tck_min; /* 12 SDRAM Minimum Cycle Time */
+ unsigned char res_13; /* 13 Reserved */
+ unsigned char caslat_lsb; /* 14 CAS Latencies Supported,
Least Significant Byte */
- uint8_t caslat_msb; /* 15 CAS Latencies Supported,
+ unsigned char caslat_msb; /* 15 CAS Latencies Supported,
Most Significant Byte */
- uint8_t taa_min; /* 16 Min CAS Latency Time */
- uint8_t twr_min; /* 17 Min Write REcovery Time */
- uint8_t trcd_min; /* 18 Min RAS# to CAS# Delay Time */
- uint8_t trrd_min; /* 19 Min Row Active to
+ 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
Row Active Delay Time */
- uint8_t trp_min; /* 20 Min Row Precharge Delay Time */
- uint8_t tras_trc_ext; /* 21 Upper Nibbles for tRAS and tRC */
- uint8_t tras_min_lsb; /* 22 Min Active to Precharge
+ 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
Delay Time */
- uint8_t trc_min_lsb; /* 23 Min Active to Active/Refresh
+ unsigned char trc_min_lsb; /* 23 Min Active to Active/Refresh
Delay Time, LSB */
- uint8_t trfc_min_lsb; /* 24 Min Refresh Recovery Delay Time */
- uint8_t trfc_min_msb; /* 25 Min Refresh Recovery Delay Time */
- uint8_t twtr_min; /* 26 Min Internal Write to
+ 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
Read Command Delay Time */
- uint8_t trtp_min; /* 27 Min Internal Read to Precharge
+ unsigned char trtp_min; /* 27 Min Internal Read to Precharge
Command Delay Time */
- uint8_t tfaw_msb; /* 28 Upper Nibble for tFAW */
- uint8_t tfaw_min; /* 29 Min Four Activate Window
+ unsigned char tfaw_msb; /* 28 Upper Nibble for tFAW */
+ unsigned char tfaw_min; /* 29 Min Four Activate Window
Delay Time*/
- uint8_t opt_features; /* 30 SDRAM Optional Features */
- uint8_t therm_ref_opt; /* 31 SDRAM Thermal and Refresh Opts */
- uint8_t therm_sensor; /* 32 Module Thermal Sensor */
- uint8_t device_type; /* 33 SDRAM device type */
- 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 */
- uint8_t res_39_59[21]; /* 39-59 Reserved, General Section */
+ unsigned char opt_features; /* 30 SDRAM Optional Features */
+ unsigned char therm_ref_opt; /* 31 SDRAM Thermal and Refresh Opts */
+ unsigned char therm_sensor; /* 32 Module Thermal Sensor */
+ unsigned char device_type; /* 33 SDRAM device type */
+ 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 */
+ unsigned char res_39_59[21]; /* 39-59 Reserved, General Section */
/* Module-Specific Section: Bytes 60-116 */
union {
struct {
/* 60 (Unbuffered) Module Nominal Height */
- uint8_t mod_height;
+ unsigned char mod_height;
/* 61 (Unbuffered) Module Maximum Thickness */
- uint8_t mod_thickness;
+ unsigned char mod_thickness;
/* 62 (Unbuffered) Reference Raw Card Used */
- uint8_t ref_raw_card;
+ unsigned char ref_raw_card;
/* 63 (Unbuffered) Address Mapping from
Edge Connector to DRAM */
- uint8_t addr_mapping;
+ unsigned char addr_mapping;
/* 64-116 (Unbuffered) Reserved */
- uint8_t res_64_116[53];
+ unsigned char res_64_116[53];
} unbuffered;
struct {
/* 60 (Registered) Module Nominal Height */
- uint8_t mod_height;
+ unsigned char mod_height;
/* 61 (Registered) Module Maximum Thickness */
- uint8_t mod_thickness;
+ unsigned char mod_thickness;
/* 62 (Registered) Reference Raw Card Used */
- uint8_t ref_raw_card;
+ unsigned char ref_raw_card;
/* 63 DIMM Module Attributes */
- uint8_t modu_attr;
+ unsigned char modu_attr;
/* 64 RDIMM Thermal Heat Spreader Solution */
- uint8_t thermal;
- /* 65 Register Manufacturer ID Code, LSB */
- uint8_t reg_id_lo;
- /* 66 Register Manufacturer ID Code, MSB */
- uint8_t reg_id_hi;
+ 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 */
- uint8_t reg_rev;
+ unsigned char reg_rev;
/* 68 Register Type */
- uint8_t reg_type;
- /* 69-76 RC1,3,5..15 (MS Nib.)/RC0,2,4..14 (LS Nib.) */
- uint8_t rcw[8];
+ unsigned char reg_type;
+ /* 69-76 RC1,3,5...15 (MS Nibble) / RC0,2,4...14 (LS Nibble) */
+ unsigned char rcw[8];
} registered;
- uint8_t uc[57]; /* 60-116 Module-Specific Section */
+ unsigned char uc[57]; /* 60-116 Module-Specific Section */
} mod_section;
/* Unique Module ID: Bytes 117-125 */
- uint8_t mmid_lsb; /* 117 Module MfgID Code LSB - JEP-106 */
- uint8_t mmid_msb; /* 118 Module MfgID Code MSB - JEP-106 */
- uint8_t mloc; /* 119 Mfg Location */
- uint8_t mdate[2]; /* 120-121 Mfg Date */
- uint8_t sernum[4]; /* 122-125 Module Serial Number */
+ 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 */
- uint8_t crc[2]; /* 126-127 SPD CRC */
+ unsigned char crc[2]; /* 126-127 SPD CRC */
/* Other Manufacturer Fields and User Space: Bytes 128-255 */
- uint8_t mpart[18]; /* 128-145 Mfg's Module Part Number */
- uint8_t mrev[2]; /* 146-147 Module Revision Code */
- uint8_t dmid_lsb; /* 148 DRAM MfgID Code LSB - JEP-106 */
- uint8_t dmid_msb; /* 149 DRAM MfgID Code MSB - JEP-106 */
- uint8_t msd[26]; /* 150-175 Mfg's Specific Data */
- uint8_t cust[80]; /* 176-255 Open for Customer Use */
+ 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 */
+
};
-extern void ddr_spd_print(uint8_t *record);
-extern uint32_t ddr3_spd_checksum_pass(const struct ddr3_spd_eeprom_s *spd);
-extern uint32_t ddr2_spd_checksum_pass(const struct ddr2_spd_eeprom_s *spd);
+/* From JEEC Standard No. 21-C release 23A */
+struct ddr4_spd_eeprom {
+ /* General Section: Bytes 0-127 */
+ uint8_t info_size_crc; /* 0 # bytes */
+ uint8_t spd_rev; /* 1 Total # bytes of SPD */
+ uint8_t mem_type; /* 2 Key Byte / mem type */
+ uint8_t module_type; /* 3 Key Byte / Module Type */
+ uint8_t density_banks; /* 4 Density and Banks */
+ uint8_t addressing; /* 5 Addressing */
+ uint8_t package_type; /* 6 Package type */
+ uint8_t opt_feature; /* 7 Optional features */
+ uint8_t thermal_ref; /* 8 Thermal and refresh */
+ uint8_t oth_opt_features; /* 9 Other optional features */
+ uint8_t res_10; /* 10 Reserved */
+ uint8_t module_vdd; /* 11 Module nominal voltage */
+ uint8_t organization; /* 12 Module Organization */
+ uint8_t bus_width; /* 13 Module Memory Bus Width */
+ uint8_t therm_sensor; /* 14 Module Thermal Sensor */
+ uint8_t ext_type; /* 15 Extended module type */
+ uint8_t res_16;
+ uint8_t timebases; /* 17 MTb and FTB */
+ uint8_t tck_min; /* 18 tCKAVGmin */
+ uint8_t tck_max; /* 19 TCKAVGmax */
+ uint8_t caslat_b1; /* 20 CAS latencies, 1st byte */
+ uint8_t caslat_b2; /* 21 CAS latencies, 2nd byte */
+ uint8_t caslat_b3; /* 22 CAS latencies, 3rd byte */
+ uint8_t caslat_b4; /* 23 CAS latencies, 4th byte */
+ uint8_t taa_min; /* 24 Min CAS Latency Time */
+ uint8_t trcd_min; /* 25 Min RAS# to CAS# Delay Time */
+ uint8_t trp_min; /* 26 Min Row Precharge Delay Time */
+ uint8_t tras_trc_ext; /* 27 Upper Nibbles for tRAS and tRC */
+ uint8_t tras_min_lsb; /* 28 tRASmin, lsb */
+ uint8_t trc_min_lsb; /* 29 tRCmin, lsb */
+ uint8_t trfc1_min_lsb; /* 30 Min Refresh Recovery Delay Time */
+ uint8_t trfc1_min_msb; /* 31 Min Refresh Recovery Delay Time */
+ uint8_t trfc2_min_lsb; /* 32 Min Refresh Recovery Delay Time */
+ uint8_t trfc2_min_msb; /* 33 Min Refresh Recovery Delay Time */
+ uint8_t trfc4_min_lsb; /* 34 Min Refresh Recovery Delay Time */
+ uint8_t trfc4_min_msb; /* 35 Min Refresh Recovery Delay Time */
+ uint8_t tfaw_msb; /* 36 Upper Nibble for tFAW */
+ uint8_t tfaw_min; /* 37 tFAW, lsb */
+ uint8_t trrds_min; /* 38 tRRD_Smin, MTB */
+ uint8_t trrdl_min; /* 39 tRRD_Lmin, MTB */
+ uint8_t tccdl_min; /* 40 tCCS_Lmin, MTB */
+ uint8_t res_41[60-41]; /* 41 Rserved */
+ uint8_t mapping[78-60]; /* 60~77 Connector to SDRAM bit map */
+ uint8_t res_78[117-78]; /* 78~116, Reserved */
+ int8_t fine_tccdl_min; /* 117 Fine offset for tCCD_Lmin */
+ int8_t fine_trrdl_min; /* 118 Fine offset for tRRD_Lmin */
+ int8_t fine_trrds_min; /* 119 Fine offset for tRRD_Smin */
+ int8_t fine_trc_min; /* 120 Fine offset for tRCmin */
+ int8_t fine_trp_min; /* 121 Fine offset for tRPmin */
+ int8_t fine_trcd_min; /* 122 Fine offset for tRCDmin */
+ int8_t fine_taa_min; /* 123 Fine offset for tAAmin */
+ int8_t fine_tck_max; /* 124 Fine offset for tCKAVGmax */
+ int8_t fine_tck_min; /* 125 Fine offset for tCKAVGmin */
+ /* CRC: Bytes 126-127 */
+ uint8_t crc[2]; /* 126-127 SPD CRC */
+
+ /* Module-Specific Section: Bytes 128-255 */
+ union {
+ struct {
+ /* 128 (Unbuffered) Module Nominal Height */
+ uint8_t mod_height;
+ /* 129 (Unbuffered) Module Maximum Thickness */
+ uint8_t mod_thickness;
+ /* 130 (Unbuffered) Reference Raw Card Used */
+ uint8_t ref_raw_card;
+ /* 131 (Unbuffered) Address Mapping from
+ Edge Connector to DRAM */
+ uint8_t addr_mapping;
+ /* 132~253 (Unbuffered) Reserved */
+ uint8_t res_132[254-132];
+ /* 254~255 CRC */
+ uint8_t crc[2];
+ } unbuffered;
+ struct {
+ /* 128 (Registered) Module Nominal Height */
+ uint8_t mod_height;
+ /* 129 (Registered) Module Maximum Thickness */
+ uint8_t mod_thickness;
+ /* 130 (Registered) Reference Raw Card Used */
+ uint8_t ref_raw_card;
+ /* 131 DIMM Module Attributes */
+ uint8_t modu_attr;
+ /* 132 RDIMM Thermal Heat Spreader Solution */
+ uint8_t thermal;
+ /* 133 Register Manufacturer ID Code, LSB */
+ uint8_t reg_id_lo;
+ /* 134 Register Manufacturer ID Code, MSB */
+ uint8_t reg_id_hi;
+ /* 135 Register Revision Number */
+ uint8_t reg_rev;
+ /* 136 Address mapping from register to DRAM */
+ u8 reg_map;
+ u8 ca_stren;
+ u8 clk_stren;
+ /* 139~253 Reserved */
+ u8 res_137[254 - 139];
+ /* 254~255 CRC */
+ uint8_t crc[2];
+ } registered;
+ struct {
+ /* 128 (Loadreduced) Module Nominal Height */
+ uint8_t mod_height;
+ /* 129 (Loadreduced) Module Maximum Thickness */
+ uint8_t mod_thickness;
+ /* 130 (Loadreduced) Reference Raw Card Used */
+ uint8_t ref_raw_card;
+ /* 131 DIMM Module Attributes */
+ uint8_t modu_attr;
+ /* 132 RDIMM Thermal Heat Spreader Solution */
+ uint8_t thermal;
+ /* 133 Register Manufacturer ID Code, LSB */
+ uint8_t reg_id_lo;
+ /* 134 Register Manufacturer ID Code, MSB */
+ uint8_t reg_id_hi;
+ /* 135 Register Revision Number */
+ uint8_t reg_rev;
+ /* 136 Address mapping from register to DRAM */
+ uint8_t reg_map;
+ /* 137 Register Output Drive Strength for CMD/Add*/
+ uint8_t reg_drv;
+ /* 138 Register Output Drive Strength for CK */
+ uint8_t reg_drv_ck;
+ /* 139 Data Buffer Revision Number */
+ uint8_t data_buf_rev;
+ /* 140 DRAM VrefDQ for Package Rank 0 */
+ uint8_t vrefqe_r0;
+ /* 141 DRAM VrefDQ for Package Rank 1 */
+ uint8_t vrefqe_r1;
+ /* 142 DRAM VrefDQ for Package Rank 2 */
+ uint8_t vrefqe_r2;
+ /* 143 DRAM VrefDQ for Package Rank 3 */
+ uint8_t vrefqe_r3;
+ /* 144 Data Buffer VrefDQ for DRAM Interface */
+ uint8_t data_intf;
+ /*
+ * 145 Data Buffer MDQ Drive Strength and RTT
+ * for data rate <= 1866
+ */
+ uint8_t data_drv_1866;
+ /*
+ * 146 Data Buffer MDQ Drive Strength and RTT
+ * for 1866 < data rate <= 2400
+ */
+ uint8_t data_drv_2400;
+ /*
+ * 147 Data Buffer MDQ Drive Strength and RTT
+ * for 2400 < data rate <= 3200
+ */
+ uint8_t data_drv_3200;
+ /* 148 DRAM Drive Strength */
+ uint8_t dram_drv;
+ /*
+ * 149 DRAM ODT (RTT_WR, RTT_NOM)
+ * for data rate <= 1866
+ */
+ uint8_t dram_odt_1866;
+ /*
+ * 150 DRAM ODT (RTT_WR, RTT_NOM)
+ * for 1866 < data rate <= 2400
+ */
+ uint8_t dram_odt_2400;
+ /*
+ * 151 DRAM ODT (RTT_WR, RTT_NOM)
+ * for 2400 < data rate <= 3200
+ */
+ uint8_t dram_odt_3200;
+ /*
+ * 152 DRAM ODT (RTT_PARK)
+ * for data rate <= 1866
+ */
+ uint8_t dram_odt_park_1866;
+ /*
+ * 153 DRAM ODT (RTT_PARK)
+ * for 1866 < data rate <= 2400
+ */
+ uint8_t dram_odt_park_2400;
+ /*
+ * 154 DRAM ODT (RTT_PARK)
+ * for 2400 < data rate <= 3200
+ */
+ uint8_t dram_odt_park_3200;
+ uint8_t res_155[254-155]; /* Reserved */
+ /* 254~255 CRC */
+ uint8_t crc[2];
+ } loadreduced;
+ uint8_t uc[128]; /* 128-255 Module-Specific Section */
+ } mod_section;
+
+ uint8_t res_256[320-256]; /* 256~319 Reserved */
+
+ /* Module supplier's data: Byte 320~383 */
+ uint8_t mmid_lsb; /* 320 Module MfgID Code LSB */
+ uint8_t mmid_msb; /* 321 Module MfgID Code MSB */
+ uint8_t mloc; /* 322 Mfg Location */
+ uint8_t mdate[2]; /* 323~324 Mfg Date */
+ uint8_t sernum[4]; /* 325~328 Module Serial Number */
+ uint8_t mpart[20]; /* 329~348 Mfg's Module Part Number */
+ uint8_t mrev; /* 349 Module Revision Code */
+ uint8_t dmid_lsb; /* 350 DRAM MfgID Code LSB */
+ uint8_t dmid_msb; /* 351 DRAM MfgID Code MSB */
+ uint8_t stepping; /* 352 DRAM stepping */
+ uint8_t msd[29]; /* 353~381 Mfg's Specific Data */
+ uint8_t res_382[2]; /* 382~383 Reserved */
-/* * Byte 2 Fundamental Memory Types. */
+ uint8_t user[512-384]; /* 384~511 End User Programmable */
+};
+
+/*
+ * 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)
+#define SPD_MEMTYPE_DDR4 (0x0C)
/* 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)
@@ -247,6 +525,41 @@ extern uint32_t ddr2_spd_checksum_pass(const struct ddr2_spd_eeprom_s *spd);
#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_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)
+#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)
+
+/* DIMM Type for DDR4 SPD */
+#define DDR4_SPD_MODULETYPE_MASK (0x0f)
+#define DDR4_SPD_MODULETYPE_EXT (0x00)
+#define DDR4_SPD_MODULETYPE_RDIMM (0x01)
+#define DDR4_SPD_MODULETYPE_UDIMM (0x02)
+#define DDR4_SPD_MODULETYPE_SO_DIMM (0x03)
+#define DDR4_SPD_MODULETYPE_LRDIMM (0x04)
+#define DDR4_SPD_MODULETYPE_MINI_RDIMM (0x05)
+#define DDR4_SPD_MODULETYPE_MINI_UDIMM (0x06)
+#define DDR4_SPD_MODULETYPE_72B_SO_UDIMM (0x08)
+#define DDR4_SPD_MODULETYPE_72B_SO_RDIMM (0x09)
+#define DDR4_SPD_MODULETYPE_16B_SO_DIMM (0x0C)
+#define DDR4_SPD_MODULETYPE_32B_SO_DIMM (0x0D)
+
+void ddr_spd_print(uint8_t *record);
+int ddr1_spd_check(const struct ddr1_spd_eeprom *spd);
+void ddr1_spd_dump(const struct ddr1_spd_eeprom *spd);
+int ddr2_spd_check(const struct ddr2_spd_eeprom *spd);
+void ddr2_spd_dump(const struct ddr2_spd_eeprom *spd);
+int ddr3_spd_check(const struct ddr3_spd_eeprom *spd);
+int ddr4_spd_check(const struct ddr4_spd_eeprom *spd);
+
#endif /* _DDR_SPD_H_ */
--
2.20.1
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