board/freescale/bsc9131rdb/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 <asm/mmu.h>
   9 #include <asm/immap_85xx.h>
  10 #include <asm/processor.h>
  11 #include <fsl_ddr_sdram.h>
  12 #include <fsl_ddr_dimm_params.h>
  13 #include <asm/io.h>
  14 #include <asm/fsl_law.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 #ifndef CONFIG_SYS_DDR_RAW_TIMING
  19 #define CONFIG_SYS_DRAM_SIZE    1024
  20
  21 fsl_ddr_cfg_regs_t ddr_cfg_regs_800 = {
  22         .cs[0].bnds = CONFIG_SYS_DDR_CS0_BNDS,
  23         .cs[0].config = CONFIG_SYS_DDR_CS0_CONFIG,
  24         .cs[0].config_2 = CONFIG_SYS_DDR_CS0_CONFIG_2,
  25         .timing_cfg_3 = CONFIG_SYS_DDR_TIMING_3_800,
  26         .timing_cfg_0 = CONFIG_SYS_DDR_TIMING_0_800,
  27         .timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1_800,
  28         .timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2_800,
  29         .ddr_sdram_cfg = CONFIG_SYS_DDR_CONTROL,
  30         .ddr_sdram_cfg_2 = CONFIG_SYS_DDR_CONTROL_2,
  31         .ddr_sdram_mode = CONFIG_SYS_DDR_MODE_1_800,
  32         .ddr_sdram_mode_2 = CONFIG_SYS_DDR_MODE_2_800,
  33         .ddr_sdram_md_cntl = CONFIG_SYS_DDR_MODE_CONTROL,
  34         .ddr_sdram_interval = CONFIG_SYS_DDR_INTERVAL_800,
  35         .ddr_data_init = CONFIG_MEM_INIT_VALUE,
  36         .ddr_sdram_clk_cntl = CONFIG_SYS_DDR_CLK_CTRL_800,
  37         .ddr_init_addr = CONFIG_SYS_DDR_INIT_ADDR,
  38         .ddr_init_ext_addr = CONFIG_SYS_DDR_INIT_EXT_ADDR,
  39         .timing_cfg_4 = CONFIG_SYS_DDR_TIMING_4,
  40         .timing_cfg_5 = CONFIG_SYS_DDR_TIMING_5,
  41         .ddr_zq_cntl = CONFIG_SYS_DDR_ZQ_CONTROL,
  42         .ddr_wrlvl_cntl = CONFIG_SYS_DDR_WRLVL_CONTROL_800,
  43         .ddr_sr_cntr = CONFIG_SYS_DDR_SR_CNTR,
  44         .ddr_sdram_rcw_1 = CONFIG_SYS_DDR_RCW_1,
  45         .ddr_sdram_rcw_2 = CONFIG_SYS_DDR_RCW_2
  46 };
  47
  48 fixed_ddr_parm_t fixed_ddr_parm_0[] = {
  49         {750, 850, &ddr_cfg_regs_800},
  50         {0, 0, NULL}
  51 };
  52
  53 unsigned long get_sdram_size(void)
  54 {
  55         return get_ram_size(CONFIG_SYS_DDR_SDRAM_BASE, CONFIG_SYS_DRAM_SIZE);
  56 }
  57
  58 /*
  59  * Fixed sdram init -- doesn't use serial presence detect.
  60  */
  61 phys_size_t fixed_sdram(void)
  62 {
  63         int i;
  64         char buf[32];
  65         fsl_ddr_cfg_regs_t ddr_cfg_regs;
  66         phys_size_t ddr_size;
  67         ulong ddr_freq, ddr_freq_mhz;
  68
  69         ddr_freq = get_ddr_freq(0);
  70         ddr_freq_mhz = ddr_freq / 1000000;
  71
  72         printf("Configuring DDR for %s MT/s data rate\n",
  73                                 strmhz(buf, ddr_freq));
  74
  75         for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) {
  76                 if ((ddr_freq_mhz > fixed_ddr_parm_0[i].min_freq) &&
  77                    (ddr_freq_mhz <= fixed_ddr_parm_0[i].max_freq)) {
  78                         memcpy(&ddr_cfg_regs, fixed_ddr_parm_0[i].ddr_settings,
  79                                                         sizeof(ddr_cfg_regs));
  80                         break;
  81                 }
  82         }
  83
  84         if (fixed_ddr_parm_0[i].max_freq == 0) {
  85                 panic("Unsupported DDR data rate %s MT/s data rate\n",
  86                                         strmhz(buf, ddr_freq));
  87         }
  88
  89         ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
  90         fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
  91
  92         if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE, ddr_size,
  93                                         LAW_TRGT_IF_DDR_1) < 0) {
  94                 printf("ERROR setting Local Access Windows for DDR\n");
  95                 return 0;
  96         }
  97
  98         return ddr_size;
  99 }
 100
 101 #else /* CONFIG_SYS_DDR_RAW_TIMING */
 102 /* Micron MT41J256M8HX-15E */
 103 dimm_params_t ddr_raw_timing = {
 104         .n_ranks = 1,
 105         .rank_density = 1073741824u,
 106         .capacity = 1073741824u,
 107         .primary_sdram_width = 32,
 108         .ec_sdram_width = 0,
 109         .registered_dimm = 0,
 110         .mirrored_dimm = 0,
 111         .n_row_addr = 15,
 112         .n_col_addr = 10,
 113         .n_banks_per_sdram_device = 8,
 114         .edc_config = 0,
 115         .burst_lengths_bitmask = 0x0c,
 116
 117         .tckmin_x_ps = 1870,
 118         .caslat_x = 0x1e << 4,  /* 5,6,7,8 */
 119         .taa_ps = 13125,
 120         .twr_ps = 15000,
 121         .trcd_ps = 13125,
 122         .trrd_ps = 7500,
 123         .trp_ps = 13125,
 124         .tras_ps = 37500,
 125         .trc_ps = 50625,
 126         .trfc_ps = 160000,
 127         .twtr_ps = 7500,
 128         .trtp_ps = 7500,
 129         .refresh_rate_ps = 7800000,
 130         .tfaw_ps = 37500,
 131 };
 132
 133 int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
 134                 unsigned int controller_number,
 135                 unsigned int dimm_number)
 136 {
 137         const char dimm_model[] = "Fixed DDR on board";
 138
 139         if ((controller_number == 0) && (dimm_number == 0)) {
 140                 memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t));
 141                 memset(pdimm->mpart, 0, sizeof(pdimm->mpart));
 142                 memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1);
 143         }
 144
 145         return 0;
 146 }
 147
 148 void fsl_ddr_board_options(memctl_options_t *popts,
 149                                 dimm_params_t *pdimm,
 150                                 unsigned int ctrl_num)
 151 {
 152         int i;
 153         popts->clk_adjust = 6;
 154         popts->cpo_override = 0x1f;
 155         popts->write_data_delay = 2;
 156         popts->half_strength_driver_enable = 1;
 157         /* Write leveling override */
 158         popts->wrlvl_en = 1;
 159         popts->wrlvl_override = 1;
 160         popts->wrlvl_sample = 0xf;
 161         popts->wrlvl_start = 0x8;
 162         popts->trwt_override = 1;
 163         popts->trwt = 0;
 164
 165         for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
 166                 popts->cs_local_opts[i].odt_rd_cfg = FSL_DDR_ODT_NEVER;
 167                 popts->cs_local_opts[i].odt_wr_cfg = FSL_DDR_ODT_CS;
 168         }
 169 }
 170
 171 #endif /* CONFIG_SYS_DDR_RAW_TIMING */