include/fsl_ddr_dimm_params.h

   1 /*
   2  * Copyright 2008-2014 Freescale Semiconductor, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * Version 2 as published by the Free Software Foundation.
   7  */
   8
   9 #ifndef DDR2_DIMM_PARAMS_H
  10 #define DDR2_DIMM_PARAMS_H
  11
  12 #define EDC_DATA_PARITY 1
  13 #define EDC_ECC         2
  14 #define EDC_AC_PARITY   4
  15
  16 /* Parameters for a DDR dimm computed from the SPD */
  17 typedef struct dimm_params_s {
  18
  19         /* DIMM organization parameters */
  20         char mpart[19];         /* guaranteed null terminated */
  21
  22         unsigned int n_ranks;
  23         unsigned long long rank_density;
  24         unsigned long long capacity;
  25         unsigned int data_width;
  26         unsigned int primary_sdram_width;
  27         unsigned int ec_sdram_width;
  28         unsigned int registered_dimm;
  29         unsigned int device_width;      /* x4, x8, x16 components */
  30
  31         /* SDRAM device parameters */
  32         unsigned int n_row_addr;
  33         unsigned int n_col_addr;
  34         unsigned int edc_config;        /* 0 = none, 1 = parity, 2 = ECC */
  35 #ifdef CONFIG_SYS_FSL_DDR4
  36         unsigned int bank_addr_bits;
  37         unsigned int bank_group_bits;
  38 #else
  39         unsigned int n_banks_per_sdram_device;
  40 #endif
  41         unsigned int burst_lengths_bitmask;     /* BL=4 bit 2, BL=8 = bit 3 */
  42         unsigned int row_density;
  43
  44         /* used in computing base address of DIMMs */
  45         unsigned long long base_address;
  46         /* mirrored DIMMs */
  47         unsigned int mirrored_dimm;     /* only for ddr3 */
  48
  49         /* DIMM timing parameters */
  50
  51         int mtb_ps;     /* medium timebase ps */
  52         int ftb_10th_ps; /* fine timebase, in 1/10 ps */
  53         int taa_ps;     /* minimum CAS latency time */
  54         int tfaw_ps;    /* four active window delay */
  55
  56         /*
  57          * SDRAM clock periods
  58          * The range for these are 1000-10000 so a short should be sufficient
  59          */
  60         int tckmin_x_ps;
  61         int tckmin_x_minus_1_ps;
  62         int tckmin_x_minus_2_ps;
  63         int tckmax_ps;
  64
  65         /* SPD-defined CAS latencies */
  66         unsigned int caslat_x;
  67         unsigned int caslat_x_minus_1;
  68         unsigned int caslat_x_minus_2;
  69
  70         unsigned int caslat_lowest_derated;     /* Derated CAS latency */
  71
  72         /* basic timing parameters */
  73         int trcd_ps;
  74         int trp_ps;
  75         int tras_ps;
  76
  77 #ifdef CONFIG_SYS_FSL_DDR4
  78         int trfc1_ps;
  79         int trfc2_ps;
  80         int trfc4_ps;
  81         int trrds_ps;
  82         int trrdl_ps;
  83         int tccdl_ps;
  84 #else
  85         int twr_ps;     /* maximum = 63750 ps */
  86         int trfc_ps;    /* max = 255 ns + 256 ns + .75 ns
  87                                        = 511750 ps */
  88         int trrd_ps;    /* maximum = 63750 ps */
  89         int twtr_ps;    /* maximum = 63750 ps */
  90         int trtp_ps;    /* byte 38, spd->trtp */
  91 #endif
  92
  93         int trc_ps;     /* maximum = 254 ns + .75 ns = 254750 ps */
  94
  95         int refresh_rate_ps;
  96         int extended_op_srt;
  97
  98 #if defined(CONFIG_SYS_FSL_DDR1) || defined(CONFIG_SYS_FSL_DDR2)
  99         int tis_ps;     /* byte 32, spd->ca_setup */
 100         int tih_ps;     /* byte 33, spd->ca_hold */
 101         int tds_ps;     /* byte 34, spd->data_setup */
 102         int tdh_ps;     /* byte 35, spd->data_hold */
 103         int tdqsq_max_ps;       /* byte 44, spd->tdqsq */
 104         int tqhs_ps;    /* byte 45, spd->tqhs */
 105 #endif
 106
 107         /* DDR3 RDIMM */
 108         unsigned char rcw[16];  /* Register Control Word 0-15 */
 109 #ifdef CONFIG_SYS_FSL_DDR4
 110         unsigned int dq_mapping[18];
 111         unsigned int dq_mapping_ors;
 112 #endif
 113 } dimm_params_t;
 114
 115 unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num,
 116                                          const generic_spd_eeprom_t *spd,
 117                                          dimm_params_t *pdimm,
 118                                          unsigned int dimm_number);
 119
 120 #endif