board/freescale/t102xrdb/ddr.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2014 Freescale Semiconductor, Inc.
   4  */
   5
   6 #include <common.h>
   7 #include <i2c.h>
   8 #include <hwconfig.h>
   9 #include <init.h>
  10 #include <log.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 #include <asm/mpc85xx_gpio.h>
  16 #include <linux/delay.h>
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 struct board_specific_parameters {
  21         u32 n_ranks;
  22         u32 datarate_mhz_high;
  23         u32 rank_gb;
  24         u32 clk_adjust;
  25         u32 wrlvl_start;
  26         u32 wrlvl_ctl_2;
  27         u32 wrlvl_ctl_3;
  28 };
  29
  30 /*
  31  * datarate_mhz_high values need to be in ascending order
  32  */
  33 static const struct board_specific_parameters udimm0[] = {
  34         /*
  35          * memory controller 0
  36          *   num|  hi| rank|  clk| wrlvl |   wrlvl   |  wrlvl |
  37          * ranks| mhz| GB  |adjst| start |   ctl2    |  ctl3  |
  38          */
  39         {2,  833,   0,  8,  6,  0x06060607,  0x08080807,},
  40         {2,  1350,  0,  8,  7,  0x0708080A,  0x0A0B0C09,},
  41         {2,  1666,  0,  8,  7,  0x0808090B,  0x0C0D0E0A,},
  42         {1,  833,   0,  8,  6,  0x06060607,  0x08080807,},
  43         {1,  1350,  0,  8,  7,  0x0708080A,  0x0A0B0C09,},
  44         {1,  1666,  0,  8,  7,  0x0808090B,  0x0C0D0E0A,},
  45         {}
  46 };
  47
  48 static const struct board_specific_parameters *udimms[] = {
  49         udimm0,
  50 };
  51
  52 void fsl_ddr_board_options(memctl_options_t *popts,
  53                            dimm_params_t *pdimm,
  54                            unsigned int ctrl_num)
  55 {
  56         const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
  57         ulong ddr_freq;
  58         struct cpu_type *cpu = gd->arch.cpu;
  59
  60         if (ctrl_num > 1) {
  61                 printf("Not supported controller number %d\n", ctrl_num);
  62                 return;
  63         }
  64         if (!pdimm->n_ranks)
  65                 return;
  66
  67         pbsp = udimms[0];
  68
  69         /* Get clk_adjust according to the board ddr freqency and n_banks
  70          * specified in board_specific_parameters table.
  71          */
  72         ddr_freq = get_ddr_freq(0) / 1000000;
  73         while (pbsp->datarate_mhz_high) {
  74                 if (pbsp->n_ranks == pdimm->n_ranks &&
  75                     (pdimm->rank_density >> 30) >= pbsp->rank_gb) {
  76                         if (ddr_freq <= pbsp->datarate_mhz_high) {
  77                                 popts->clk_adjust = pbsp->clk_adjust;
  78                                 popts->wrlvl_start = pbsp->wrlvl_start;
  79                                 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
  80                                 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
  81                                 goto found;
  82                         }
  83                         pbsp_highest = pbsp;
  84                 }
  85                 pbsp++;
  86         }
  87
  88         if (pbsp_highest) {
  89                 printf("Error: board specific timing not found\n");
  90                 printf("for data rate %lu MT/s\n", ddr_freq);
  91                 printf("Trying to use the highest speed (%u) parameters\n",
  92                        pbsp_highest->datarate_mhz_high);
  93                 popts->clk_adjust = pbsp_highest->clk_adjust;
  94                 popts->wrlvl_start = pbsp_highest->wrlvl_start;
  95                 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
  96                 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
  97         } else {
  98                 panic("DIMM is not supported by this board");
  99         }
 100 found:
 101         debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n",
 102               pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb);
 103         debug("\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, ",
 104               pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2);
 105         debug("wrlvl_ctrl_3 0x%x\n", pbsp->wrlvl_ctl_3);
 106
 107         /*
 108          * Factors to consider for half-strength driver enable:
 109          *      - number of DIMMs installed
 110          */
 111         popts->half_strength_driver_enable = 0;
 112         /*
 113          * Write leveling override
 114          */
 115         popts->wrlvl_override = 1;
 116         popts->wrlvl_sample = 0xf;
 117
 118         /*
 119          * rtt and rtt_wr override
 120          */
 121         popts->rtt_override = 0;
 122
 123         /* Enable ZQ calibration */
 124         popts->zq_en = 1;
 125
 126         /* DHC_EN =1, ODT = 75 Ohm */
 127         popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_OFF);
 128         popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_OFF);
 129
 130         /* T1023 supports max DDR bus 32bit width, T1024 supports DDR 64bit,
 131          * force DDR bus width to 32bit for T1023
 132          */
 133         if (cpu->soc_ver == SVR_T1023)
 134                 popts->data_bus_width = DDR_DATA_BUS_WIDTH_32;
 135
 136 #ifdef CONFIG_FORCE_DDR_DATA_BUS_WIDTH_32
 137         /* for DDR bus 32bit test on T1024 */
 138         popts->data_bus_width = DDR_DATA_BUS_WIDTH_32;
 139 #endif
 140
 141 #ifdef CONFIG_TARGET_T1023RDB
 142         popts->wrlvl_ctl_2 = 0x07070606;
 143         popts->half_strength_driver_enable = 1;
 144         popts->cpo_sample = 0x43;
 145 #elif defined(CONFIG_TARGET_T1024RDB)
 146         /* optimize cpo for erratum A-009942 */
 147         popts->cpo_sample = 0x52;
 148 #endif
 149 }
 150
 151 #ifdef CONFIG_SYS_DDR_RAW_TIMING
 152 /* 2GB discrete DDR4 MT40A512M8HX on T1023RDB */
 153 dimm_params_t ddr_raw_timing = {
 154         .n_ranks = 1,
 155         .rank_density = 0x80000000,
 156         .capacity = 0x80000000,
 157         .primary_sdram_width = 32,
 158         .ec_sdram_width = 8,
 159         .registered_dimm = 0,
 160         .mirrored_dimm = 0,
 161         .n_row_addr = 15,
 162         .n_col_addr = 10,
 163         .bank_addr_bits = 2,
 164         .bank_group_bits = 2,
 165         .edc_config = 0,
 166         .burst_lengths_bitmask = 0x0c,
 167         .tckmin_x_ps = 938,
 168         .tckmax_ps = 1500,
 169         .caslat_x = 0x000DFA00,
 170         .taa_ps = 13500,
 171         .trcd_ps = 13500,
 172         .trp_ps = 13500,
 173         .tras_ps = 33000,
 174         .trc_ps = 46500,
 175         .trfc1_ps = 260000,
 176         .trfc2_ps = 160000,
 177         .trfc4_ps = 110000,
 178         .tfaw_ps = 25000,
 179         .trrds_ps = 3700,
 180         .trrdl_ps = 5300,
 181         .tccdl_ps = 5355,
 182         .refresh_rate_ps = 7800000,
 183         .dq_mapping[0] = 0x0,
 184         .dq_mapping[1] = 0x0,
 185         .dq_mapping[2] = 0x0,
 186         .dq_mapping[3] = 0x0,
 187         .dq_mapping[4] = 0x0,
 188         .dq_mapping[5] = 0x0,
 189         .dq_mapping[6] = 0x0,
 190         .dq_mapping[7] = 0x0,
 191         .dq_mapping[8] = 0x0,
 192         .dq_mapping[9] = 0x0,
 193         .dq_mapping[10] = 0x0,
 194         .dq_mapping[11] = 0x0,
 195         .dq_mapping[12] = 0x0,
 196         .dq_mapping[13] = 0x0,
 197         .dq_mapping[14] = 0x0,
 198         .dq_mapping[15] = 0x0,
 199         .dq_mapping[16] = 0x0,
 200         .dq_mapping[17] = 0x0,
 201         .dq_mapping_ors = 1,
 202 };
 203
 204 int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
 205                 unsigned int controller_number,
 206                 unsigned int dimm_number)
 207 {
 208         const char dimm_model[] = "Fixed DDR4 on board";
 209
 210         if (((controller_number == 0) && (dimm_number == 0)) ||
 211             ((controller_number == 1) && (dimm_number == 0))) {
 212                 memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t));
 213                 memset(pdimm->mpart, 0, sizeof(pdimm->mpart));
 214                 memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1);
 215         }
 216
 217         return 0;
 218 }
 219 #endif
 220
 221 #if defined(CONFIG_DEEP_SLEEP)
 222 void board_mem_sleep_setup(void)
 223 {
 224         void __iomem *cpld_base = (void *)CONFIG_SYS_CPLD_BASE;
 225
 226         /* does not provide HW signals for power management */
 227         clrbits_8(cpld_base + 0x17, 0x40);
 228         /* Disable MCKE isolation */
 229         gpio_set_value(2, 0);
 230         udelay(1);
 231 }
 232 #endif
 233
 234 int dram_init(void)
 235 {
 236         phys_size_t dram_size;
 237
 238 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_RAMBOOT_PBL)
 239 #ifndef CONFIG_SYS_DDR_RAW_TIMING
 240         puts("Initializing....using SPD\n");
 241 #endif
 242         dram_size = fsl_ddr_sdram();
 243 #else
 244         /* DDR has been initialised by first stage boot loader */
 245         dram_size =  fsl_ddr_sdram_size();
 246 #endif
 247         dram_size = setup_ddr_tlbs(dram_size / 0x100000);
 248         dram_size *= 0x100000;
 249
 250 #if defined(CONFIG_DEEP_SLEEP) && !defined(CONFIG_SPL_BUILD)
 251         fsl_dp_resume();
 252 #endif
 253
 254         gd->ram_size = dram_size;
 255
 256         return 0;
 257 }