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 <asm/fsl_ddr_sdram.h> 12 #include <asm/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 */ 172