board/freescale/b4860qds/ddr.c

   1 /*
   2  * Copyright 2011-2012 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 #include <common.h>
   8 #include <i2c.h>
   9 #include <hwconfig.h>
  10 #include <fsl_ddr.h>
  11 #include <asm/mmu.h>
  12 #include <fsl_ddr_sdram.h>
  13 #include <fsl_ddr_dimm_params.h>
  14 #include <asm/fsl_law.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 dimm_params_t ddr_raw_timing = {
  19         .n_ranks = 2,
  20         .rank_density = 2147483648u,
  21         .capacity = 4294967296u,
  22         .primary_sdram_width = 64,
  23         .ec_sdram_width = 8,
  24         .registered_dimm = 0,
  25         .mirrored_dimm = 1,
  26         .n_row_addr = 15,
  27         .n_col_addr = 10,
  28         .n_banks_per_sdram_device = 8,
  29         .edc_config = 2,        /* ECC */
  30         .burst_lengths_bitmask = 0x0c,
  31
  32         .tckmin_x_ps = 1071,
  33         .caslat_x = 0x2fe << 4, /* 5,6,7,8,9,10,11,13 */
  34         .taa_ps = 13910,
  35         .twr_ps = 15000,
  36         .trcd_ps = 13910,
  37         .trrd_ps = 6000,
  38         .trp_ps = 13910,
  39         .tras_ps = 34000,
  40         .trc_ps = 48910,
  41         .trfc_ps = 260000,
  42         .twtr_ps = 7500,
  43         .trtp_ps = 7500,
  44         .refresh_rate_ps = 7800000,
  45         .tfaw_ps = 35000,
  46 };
  47
  48 int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
  49                 unsigned int controller_number,
  50                 unsigned int dimm_number)
  51 {
  52         const char dimm_model[] = "RAW timing DDR";
  53
  54         if ((controller_number == 0) && (dimm_number == 0)) {
  55                 memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t));
  56                 memset(pdimm->mpart, 0, sizeof(pdimm->mpart));
  57                 memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1);
  58         }
  59
  60         return 0;
  61 }
  62
  63 struct board_specific_parameters {
  64         u32 n_ranks;
  65         u32 datarate_mhz_high;
  66         u32 clk_adjust;
  67         u32 wrlvl_start;
  68         u32 wrlvl_ctl_2;
  69         u32 wrlvl_ctl_3;
  70         u32 cpo;
  71         u32 write_data_delay;
  72         u32 force_2t;
  73 };
  74
  75 /*
  76  * This table contains all valid speeds we want to override with board
  77  * specific parameters. datarate_mhz_high values need to be in ascending order
  78  * for each n_ranks group.
  79  */
  80 static const struct board_specific_parameters udimm0[] = {
  81         /*
  82          * memory controller 0
  83          *   num|  hi|  clk| wrlvl |   wrlvl   |  wrlvl | cpo  |wrdata|2T
  84          * ranks| mhz|adjst| start |   ctl2    |  ctl3  |      |delay |
  85          */
  86         {2,  1350,    4,     7, 0x09080807, 0x07060607,   0xff,    2,  0},
  87         {2,  1666,    4,     7, 0x09080806, 0x06050607,   0xff,    2,  0},
  88         {2,  1900,    3,     7, 0x08070706, 0x06040507,   0xff,    2,  0},
  89         {1,  1350,    4,     7, 0x09080807, 0x07060607,   0xff,    2,  0},
  90         {1,  1700,    4,     7, 0x09080806, 0x06050607,   0xff,    2,  0},
  91         {1,  1900,    3,     7, 0x08070706, 0x06040507,   0xff,    2,  0},
  92         {}
  93 };
  94
  95 static const struct board_specific_parameters *udimms[] = {
  96         udimm0,
  97 };
  98
  99 void fsl_ddr_board_options(memctl_options_t *popts,
 100                                 dimm_params_t *pdimm,
 101                                 unsigned int ctrl_num)
 102 {
 103         const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
 104         ulong ddr_freq;
 105
 106         if (ctrl_num > 2) {
 107                 printf("Not supported controller number %d\n", ctrl_num);
 108                 return;
 109         }
 110         if (!pdimm->n_ranks)
 111                 return;
 112
 113         pbsp = udimms[0];
 114
 115
 116         /* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
 117          * freqency and n_banks specified in board_specific_parameters table.
 118          */
 119         ddr_freq = get_ddr_freq(0) / 1000000;
 120         while (pbsp->datarate_mhz_high) {
 121                 if (pbsp->n_ranks == pdimm->n_ranks) {
 122                         if (ddr_freq <= pbsp->datarate_mhz_high) {
 123                                 popts->cpo_override = pbsp->cpo;
 124                                 popts->write_data_delay =
 125                                         pbsp->write_data_delay;
 126                                 popts->clk_adjust = pbsp->clk_adjust;
 127                                 popts->wrlvl_start = pbsp->wrlvl_start;
 128                                 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
 129                                 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
 130                                 popts->twot_en = pbsp->force_2t;
 131                                 goto found;
 132                         }
 133                         pbsp_highest = pbsp;
 134                 }
 135                 pbsp++;
 136         }
 137
 138         if (pbsp_highest) {
 139                 printf("Error: board specific timing not found "
 140                         "for data rate %lu MT/s\n"
 141                         "Trying to use the highest speed (%u) parameters\n",
 142                         ddr_freq, pbsp_highest->datarate_mhz_high);
 143                 popts->cpo_override = pbsp_highest->cpo;
 144                 popts->write_data_delay = pbsp_highest->write_data_delay;
 145                 popts->clk_adjust = pbsp_highest->clk_adjust;
 146                 popts->wrlvl_start = pbsp_highest->wrlvl_start;
 147                 popts->twot_en = pbsp_highest->force_2t;
 148         } else {
 149                 panic("DIMM is not supported by this board");
 150         }
 151 found:
 152         /*
 153          * Factors to consider for half-strength driver enable:
 154          *      - number of DIMMs installed
 155          */
 156         popts->half_strength_driver_enable = 0;
 157         /*
 158          * Write leveling override
 159          */
 160         popts->wrlvl_override = 1;
 161         popts->wrlvl_sample = 0xf;
 162
 163         /*
 164          * Rtt and Rtt_WR override
 165          */
 166         popts->rtt_override = 0;
 167
 168         /* Enable ZQ calibration */
 169         popts->zq_en = 1;
 170
 171         /* DHC_EN =1, ODT = 75 Ohm */
 172         popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
 173         popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
 174
 175         /* optimize cpo for erratum A-009942 */
 176         popts->cpo_sample = 0x3e;
 177 }
 178
 179 int initdram(void)
 180 {
 181         phys_size_t dram_size;
 182
 183 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_RAMBOOT_PBL)
 184         puts("Initializing....using SPD\n");
 185         dram_size = fsl_ddr_sdram();
 186 #else
 187         dram_size =  fsl_ddr_sdram_size();
 188 #endif
 189         dram_size = setup_ddr_tlbs(dram_size / 0x100000);
 190         dram_size *= 0x100000;
 191
 192         gd->ram_size = dram_size;
 193
 194         return 0;
 195 }
 196
 197 unsigned long long step_assign_addresses(fsl_ddr_info_t *pinfo,
 198                           unsigned int dbw_cap_adj[])
 199 {
 200         int i, j;
 201         unsigned long long total_mem, current_mem_base, total_ctlr_mem;
 202         unsigned long long rank_density, ctlr_density = 0;
 203
 204         current_mem_base = 0ull;
 205         total_mem = 0;
 206         /*
 207          * This board has soldered DDR chips. DDRC1 has two rank.
 208          * DDRC2 has only one rank.
 209          * Assigning DDRC2 to lower address and DDRC1 to higher address.
 210          */
 211         if (pinfo->memctl_opts[0].memctl_interleaving) {
 212                 rank_density = pinfo->dimm_params[0][0].rank_density >>
 213                                         dbw_cap_adj[0];
 214                 ctlr_density = rank_density;
 215
 216                 debug("rank density is 0x%llx, ctlr density is 0x%llx\n",
 217                       rank_density, ctlr_density);
 218                 for (i = CONFIG_SYS_NUM_DDR_CTLRS - 1; i >= 0; i--) {
 219                         switch (pinfo->memctl_opts[i].memctl_interleaving_mode) {
 220                         case FSL_DDR_CACHE_LINE_INTERLEAVING:
 221                         case FSL_DDR_PAGE_INTERLEAVING:
 222                         case FSL_DDR_BANK_INTERLEAVING:
 223                         case FSL_DDR_SUPERBANK_INTERLEAVING:
 224                                 total_ctlr_mem = 2 * ctlr_density;
 225                                 break;
 226                         default:
 227                                 panic("Unknown interleaving mode");
 228                         }
 229                         pinfo->common_timing_params[i].base_address =
 230                                                 current_mem_base;
 231                         pinfo->common_timing_params[i].total_mem =
 232                                                 total_ctlr_mem;
 233                         total_mem = current_mem_base + total_ctlr_mem;
 234                         debug("ctrl %d base 0x%llx\n", i, current_mem_base);
 235                         debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem);
 236                 }
 237         } else {
 238                 /*
 239                  * Simple linear assignment if memory
 240                  * controllers are not interleaved.
 241                  */
 242                 for (i = CONFIG_SYS_NUM_DDR_CTLRS - 1; i >= 0; i--) {
 243                         total_ctlr_mem = 0;
 244                         pinfo->common_timing_params[i].base_address =
 245                                                 current_mem_base;
 246                         for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
 247                                 /* Compute DIMM base addresses. */
 248                                 unsigned long long cap =
 249                                         pinfo->dimm_params[i][j].capacity;
 250                                 pinfo->dimm_params[i][j].base_address =
 251                                         current_mem_base;
 252                                 debug("ctrl %d dimm %d base 0x%llx\n",
 253                                       i, j, current_mem_base);
 254                                 current_mem_base += cap;
 255                                 total_ctlr_mem += cap;
 256                         }
 257                         debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem);
 258                         pinfo->common_timing_params[i].total_mem =
 259                                                         total_ctlr_mem;
 260                         total_mem += total_ctlr_mem;
 261                 }
 262         }
 263         debug("Total mem by %s is 0x%llx\n", __func__, total_mem);
 264
 265         return total_mem;
 266 }