1 /* 2 * Copyright 2010-2011 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 fsl_ddr_cfg_regs_t ddr_cfg_regs_667 = { 49 .cs[0].bnds = CONFIG_SYS_DDR_CS0_BNDS, 50 .cs[0].config = CONFIG_SYS_DDR_CS0_CONFIG, 51 .cs[0].config_2 = CONFIG_SYS_DDR_CS0_CONFIG_2, 52 .timing_cfg_3 = CONFIG_SYS_DDR_TIMING_3_667, 53 .timing_cfg_0 = CONFIG_SYS_DDR_TIMING_0_667, 54 .timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1_667, 55 .timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2_667, 56 .ddr_sdram_cfg = CONFIG_SYS_DDR_CONTROL, 57 .ddr_sdram_cfg_2 = CONFIG_SYS_DDR_CONTROL_2, 58 .ddr_sdram_mode = CONFIG_SYS_DDR_MODE_1_667, 59 .ddr_sdram_mode_2 = CONFIG_SYS_DDR_MODE_2_667, 60 .ddr_sdram_md_cntl = CONFIG_SYS_DDR_MODE_CONTROL, 61 .ddr_sdram_interval = CONFIG_SYS_DDR_INTERVAL_667, 62 .ddr_data_init = CONFIG_MEM_INIT_VALUE, 63 .ddr_sdram_clk_cntl = CONFIG_SYS_DDR_CLK_CTRL_667, 64 .ddr_init_addr = CONFIG_SYS_DDR_INIT_ADDR, 65 .ddr_init_ext_addr = CONFIG_SYS_DDR_INIT_EXT_ADDR, 66 .timing_cfg_4 = CONFIG_SYS_DDR_TIMING_4, 67 .timing_cfg_5 = CONFIG_SYS_DDR_TIMING_5, 68 .ddr_zq_cntl = CONFIG_SYS_DDR_ZQ_CONTROL, 69 .ddr_wrlvl_cntl = CONFIG_SYS_DDR_WRLVL_CONTROL_667, 70 .ddr_sr_cntr = CONFIG_SYS_DDR_SR_CNTR, 71 .ddr_sdram_rcw_1 = CONFIG_SYS_DDR_RCW_1, 72 .ddr_sdram_rcw_2 = CONFIG_SYS_DDR_RCW_2 73 }; 74 75 fixed_ddr_parm_t fixed_ddr_parm_0[] = { 76 {750, 850, &ddr_cfg_regs_800}, 77 {607, 749, &ddr_cfg_regs_667}, 78 {0, 0, NULL} 79 }; 80 81 unsigned long get_sdram_size(void) 82 { 83 struct cpu_type *cpu; 84 phys_size_t ddr_size; 85 86 cpu = gd->arch.cpu; 87 /* P1014 and it's derivatives support max 16it DDR width */ 88 if (cpu->soc_ver == SVR_P1014) 89 ddr_size = (CONFIG_SYS_DRAM_SIZE / 2); 90 else 91 ddr_size = CONFIG_SYS_DRAM_SIZE; 92 93 return ddr_size; 94 } 95 96 /* 97 * Fixed sdram init -- doesn't use serial presence detect. 98 */ 99 phys_size_t fixed_sdram(void) 100 { 101 int i; 102 char buf[32]; 103 fsl_ddr_cfg_regs_t ddr_cfg_regs; 104 phys_size_t ddr_size; 105 ulong ddr_freq, ddr_freq_mhz; 106 struct cpu_type *cpu; 107 108 #if defined(CONFIG_SYS_RAMBOOT) 109 return CONFIG_SYS_SDRAM_SIZE * 1024 * 1024; 110 #endif 111 112 ddr_freq = get_ddr_freq(0); 113 ddr_freq_mhz = ddr_freq / 1000000; 114 115 printf("Configuring DDR for %s MT/s data rate\n", 116 strmhz(buf, ddr_freq)); 117 118 for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) { 119 if ((ddr_freq_mhz > fixed_ddr_parm_0[i].min_freq) && 120 (ddr_freq_mhz <= fixed_ddr_parm_0[i].max_freq)) { 121 memcpy(&ddr_cfg_regs, fixed_ddr_parm_0[i].ddr_settings, 122 sizeof(ddr_cfg_regs)); 123 break; 124 } 125 } 126 127 if (fixed_ddr_parm_0[i].max_freq == 0) 128 panic("Unsupported DDR data rate %s MT/s data rate\n", 129 strmhz(buf, ddr_freq)); 130 131 cpu = gd->arch.cpu; 132 /* P1014 and it's derivatives support max 16bit DDR width */ 133 if (cpu->soc_ver == SVR_P1014) { 134 ddr_cfg_regs.ddr_sdram_cfg &= ~SDRAM_CFG_DBW_MASK; 135 ddr_cfg_regs.ddr_sdram_cfg |= SDRAM_CFG_16_BE; 136 /* divide SA and EA by two and then mask the rest so we don't 137 * write to reserved fields */ 138 ddr_cfg_regs.cs[0].bnds = (CONFIG_SYS_DDR_CS0_BNDS >> 1) & 0x0fff0fff; 139 } 140 141 ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024; 142 fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0); 143 144 if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE, ddr_size, 145 LAW_TRGT_IF_DDR_1) < 0) { 146 printf("ERROR setting Local Access Windows for DDR\n"); 147 return 0; 148 } 149 150 return ddr_size; 151 } 152 153 #else /* CONFIG_SYS_DDR_RAW_TIMING */ 154 /* 155 * Samsung K4B2G0846C-HCF8 156 * The following timing are for "downshift" 157 * i.e. to use CL9 part as CL7 158 * otherwise, tAA, tRCD, tRP will be 13500ps 159 * and tRC will be 49500ps 160 */ 161 dimm_params_t ddr_raw_timing = { 162 .n_ranks = 1, 163 .rank_density = 1073741824u, 164 .capacity = 1073741824u, 165 .primary_sdram_width = 32, 166 .ec_sdram_width = 0, 167 .registered_dimm = 0, 168 .mirrored_dimm = 0, 169 .n_row_addr = 15, 170 .n_col_addr = 10, 171 .n_banks_per_sdram_device = 8, 172 .edc_config = 0, 173 .burst_lengths_bitmask = 0x0c, 174 175 .tCKmin_X_ps = 1875, 176 .caslat_X = 0x1e << 4, /* 5,6,7,8 */ 177 .tAA_ps = 13125, 178 .tWR_ps = 15000, 179 .tRCD_ps = 13125, 180 .tRRD_ps = 7500, 181 .tRP_ps = 13125, 182 .tRAS_ps = 37500, 183 .tRC_ps = 50625, 184 .tRFC_ps = 160000, 185 .tWTR_ps = 7500, 186 .tRTP_ps = 7500, 187 .refresh_rate_ps = 7800000, 188 .tFAW_ps = 37500, 189 }; 190 191 int fsl_ddr_get_dimm_params(dimm_params_t *pdimm, 192 unsigned int controller_number, 193 unsigned int dimm_number) 194 { 195 const char dimm_model[] = "Fixed DDR on board"; 196 197 if ((controller_number == 0) && (dimm_number == 0)) { 198 memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t)); 199 memset(pdimm->mpart, 0, sizeof(pdimm->mpart)); 200 memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1); 201 } 202 203 return 0; 204 } 205 206 void fsl_ddr_board_options(memctl_options_t *popts, 207 dimm_params_t *pdimm, 208 unsigned int ctrl_num) 209 { 210 struct cpu_type *cpu; 211 int i; 212 popts->clk_adjust = 6; 213 popts->cpo_override = 0x1f; 214 popts->write_data_delay = 2; 215 popts->half_strength_driver_enable = 1; 216 /* Write leveling override */ 217 popts->wrlvl_en = 1; 218 popts->wrlvl_override = 1; 219 popts->wrlvl_sample = 0xf; 220 popts->wrlvl_start = 0x8; 221 popts->trwt_override = 1; 222 popts->trwt = 0; 223 224 cpu = gd->arch.cpu; 225 /* P1014 and it's derivatives support max 16it DDR width */ 226 if (cpu->soc_ver == SVR_P1014) 227 popts->data_bus_width = DDR_DATA_BUS_WIDTH_16; 228 229 for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { 230 popts->cs_local_opts[i].odt_rd_cfg = FSL_DDR_ODT_NEVER; 231 popts->cs_local_opts[i].odt_wr_cfg = FSL_DDR_ODT_CS; 232 } 233 } 234 235 #endif /* CONFIG_SYS_DDR_RAW_TIMING */ 236