1 /* 2 * Copyright 2010-2011 Freescale Semiconductor, Inc. 3 * 4 * See file CREDITS for list of people who contributed to this 5 * project. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as 9 * published by the Free Software Foundation; either version 2 of 10 * the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 20 * MA 02111-1307 USA 21 */ 22 23 #include <common.h> 24 #include <asm/mmu.h> 25 #include <asm/immap_85xx.h> 26 #include <asm/processor.h> 27 #include <asm/fsl_ddr_sdram.h> 28 #include <asm/fsl_ddr_dimm_params.h> 29 #include <asm/io.h> 30 #include <asm/fsl_law.h> 31 32 DECLARE_GLOBAL_DATA_PTR; 33 34 #ifndef CONFIG_SYS_DDR_RAW_TIMING 35 #define CONFIG_SYS_DRAM_SIZE 1024 36 37 fsl_ddr_cfg_regs_t ddr_cfg_regs_800 = { 38 .cs[0].bnds = CONFIG_SYS_DDR_CS0_BNDS, 39 .cs[0].config = CONFIG_SYS_DDR_CS0_CONFIG, 40 .cs[0].config_2 = CONFIG_SYS_DDR_CS0_CONFIG_2, 41 .timing_cfg_3 = CONFIG_SYS_DDR_TIMING_3_800, 42 .timing_cfg_0 = CONFIG_SYS_DDR_TIMING_0_800, 43 .timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1_800, 44 .timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2_800, 45 .ddr_sdram_cfg = CONFIG_SYS_DDR_CONTROL, 46 .ddr_sdram_cfg_2 = CONFIG_SYS_DDR_CONTROL_2, 47 .ddr_sdram_mode = CONFIG_SYS_DDR_MODE_1_800, 48 .ddr_sdram_mode_2 = CONFIG_SYS_DDR_MODE_2_800, 49 .ddr_sdram_md_cntl = CONFIG_SYS_DDR_MODE_CONTROL, 50 .ddr_sdram_interval = CONFIG_SYS_DDR_INTERVAL_800, 51 .ddr_data_init = CONFIG_MEM_INIT_VALUE, 52 .ddr_sdram_clk_cntl = CONFIG_SYS_DDR_CLK_CTRL_800, 53 .ddr_init_addr = CONFIG_SYS_DDR_INIT_ADDR, 54 .ddr_init_ext_addr = CONFIG_SYS_DDR_INIT_EXT_ADDR, 55 .timing_cfg_4 = CONFIG_SYS_DDR_TIMING_4, 56 .timing_cfg_5 = CONFIG_SYS_DDR_TIMING_5, 57 .ddr_zq_cntl = CONFIG_SYS_DDR_ZQ_CONTROL, 58 .ddr_wrlvl_cntl = CONFIG_SYS_DDR_WRLVL_CONTROL_800, 59 .ddr_sr_cntr = CONFIG_SYS_DDR_SR_CNTR, 60 .ddr_sdram_rcw_1 = CONFIG_SYS_DDR_RCW_1, 61 .ddr_sdram_rcw_2 = CONFIG_SYS_DDR_RCW_2 62 }; 63 64 fsl_ddr_cfg_regs_t ddr_cfg_regs_667 = { 65 .cs[0].bnds = CONFIG_SYS_DDR_CS0_BNDS, 66 .cs[0].config = CONFIG_SYS_DDR_CS0_CONFIG, 67 .cs[0].config_2 = CONFIG_SYS_DDR_CS0_CONFIG_2, 68 .timing_cfg_3 = CONFIG_SYS_DDR_TIMING_3_667, 69 .timing_cfg_0 = CONFIG_SYS_DDR_TIMING_0_667, 70 .timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1_667, 71 .timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2_667, 72 .ddr_sdram_cfg = CONFIG_SYS_DDR_CONTROL, 73 .ddr_sdram_cfg_2 = CONFIG_SYS_DDR_CONTROL_2, 74 .ddr_sdram_mode = CONFIG_SYS_DDR_MODE_1_667, 75 .ddr_sdram_mode_2 = CONFIG_SYS_DDR_MODE_2_667, 76 .ddr_sdram_md_cntl = CONFIG_SYS_DDR_MODE_CONTROL, 77 .ddr_sdram_interval = CONFIG_SYS_DDR_INTERVAL_667, 78 .ddr_data_init = CONFIG_MEM_INIT_VALUE, 79 .ddr_sdram_clk_cntl = CONFIG_SYS_DDR_CLK_CTRL_667, 80 .ddr_init_addr = CONFIG_SYS_DDR_INIT_ADDR, 81 .ddr_init_ext_addr = CONFIG_SYS_DDR_INIT_EXT_ADDR, 82 .timing_cfg_4 = CONFIG_SYS_DDR_TIMING_4, 83 .timing_cfg_5 = CONFIG_SYS_DDR_TIMING_5, 84 .ddr_zq_cntl = CONFIG_SYS_DDR_ZQ_CONTROL, 85 .ddr_wrlvl_cntl = CONFIG_SYS_DDR_WRLVL_CONTROL_667, 86 .ddr_sr_cntr = CONFIG_SYS_DDR_SR_CNTR, 87 .ddr_sdram_rcw_1 = CONFIG_SYS_DDR_RCW_1, 88 .ddr_sdram_rcw_2 = CONFIG_SYS_DDR_RCW_2 89 }; 90 91 fixed_ddr_parm_t fixed_ddr_parm_0[] = { 92 {750, 850, &ddr_cfg_regs_800}, 93 {607, 749, &ddr_cfg_regs_667}, 94 {0, 0, NULL} 95 }; 96 97 unsigned long get_sdram_size(void) 98 { 99 struct cpu_type *cpu; 100 phys_size_t ddr_size; 101 102 cpu = gd->cpu; 103 /* P1014 and it's derivatives support max 16it DDR width */ 104 if (cpu->soc_ver == SVR_P1014) 105 ddr_size = (CONFIG_SYS_DRAM_SIZE / 2); 106 else 107 ddr_size = CONFIG_SYS_DRAM_SIZE; 108 109 return ddr_size; 110 } 111 112 /* 113 * Fixed sdram init -- doesn't use serial presence detect. 114 */ 115 phys_size_t fixed_sdram(void) 116 { 117 int i; 118 char buf[32]; 119 fsl_ddr_cfg_regs_t ddr_cfg_regs; 120 phys_size_t ddr_size; 121 ulong ddr_freq, ddr_freq_mhz; 122 struct cpu_type *cpu; 123 124 #if defined(CONFIG_SYS_RAMBOOT) 125 return CONFIG_SYS_SDRAM_SIZE * 1024 * 1024; 126 #endif 127 128 ddr_freq = get_ddr_freq(0); 129 ddr_freq_mhz = ddr_freq / 1000000; 130 131 printf("Configuring DDR for %s MT/s data rate\n", 132 strmhz(buf, ddr_freq)); 133 134 for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) { 135 if ((ddr_freq_mhz > fixed_ddr_parm_0[i].min_freq) && 136 (ddr_freq_mhz <= fixed_ddr_parm_0[i].max_freq)) { 137 memcpy(&ddr_cfg_regs, fixed_ddr_parm_0[i].ddr_settings, 138 sizeof(ddr_cfg_regs)); 139 break; 140 } 141 } 142 143 if (fixed_ddr_parm_0[i].max_freq == 0) 144 panic("Unsupported DDR data rate %s MT/s data rate\n", 145 strmhz(buf, ddr_freq)); 146 147 cpu = gd->cpu; 148 /* P1014 and it's derivatives support max 16bit DDR width */ 149 if (cpu->soc_ver == SVR_P1014) { 150 ddr_cfg_regs.ddr_sdram_cfg |= SDRAM_CFG_16_BE; 151 ddr_cfg_regs.cs[0].bnds = CONFIG_SYS_DDR_CS0_BNDS >> 1; 152 ddr_cfg_regs.ddr_sdram_cfg &= ~0x00180000; 153 ddr_cfg_regs.ddr_sdram_cfg |= 0x001080000; 154 } 155 156 ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024; 157 fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0); 158 159 if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE, ddr_size, 160 LAW_TRGT_IF_DDR_1) < 0) { 161 printf("ERROR setting Local Access Windows for DDR\n"); 162 return 0; 163 } 164 165 return ddr_size; 166 } 167 168 #else /* CONFIG_SYS_DDR_RAW_TIMING */ 169 /* 170 * Samsung K4B2G0846C-HCF8 171 * The following timing are for "downshift" 172 * i.e. to use CL9 part as CL7 173 * otherwise, tAA, tRCD, tRP will be 13500ps 174 * and tRC will be 49500ps 175 */ 176 dimm_params_t ddr_raw_timing = { 177 .n_ranks = 1, 178 .rank_density = 1073741824u, 179 .capacity = 1073741824u, 180 .primary_sdram_width = 32, 181 .ec_sdram_width = 0, 182 .registered_dimm = 0, 183 .mirrored_dimm = 0, 184 .n_row_addr = 15, 185 .n_col_addr = 10, 186 .n_banks_per_sdram_device = 8, 187 .edc_config = 0, 188 .burst_lengths_bitmask = 0x0c, 189 190 .tCKmin_X_ps = 1875, 191 .caslat_X = 0x1e << 4, /* 5,6,7,8 */ 192 .tAA_ps = 13125, 193 .tWR_ps = 15000, 194 .tRCD_ps = 13125, 195 .tRRD_ps = 7500, 196 .tRP_ps = 13125, 197 .tRAS_ps = 37500, 198 .tRC_ps = 50625, 199 .tRFC_ps = 160000, 200 .tWTR_ps = 7500, 201 .tRTP_ps = 7500, 202 .refresh_rate_ps = 7800000, 203 .tFAW_ps = 37500, 204 }; 205 206 int fsl_ddr_get_dimm_params(dimm_params_t *pdimm, 207 unsigned int controller_number, 208 unsigned int dimm_number) 209 { 210 const char dimm_model[] = "Fixed DDR on board"; 211 212 if ((controller_number == 0) && (dimm_number == 0)) { 213 memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t)); 214 memset(pdimm->mpart, 0, sizeof(pdimm->mpart)); 215 memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1); 216 } 217 218 return 0; 219 } 220 221 void fsl_ddr_board_options(memctl_options_t *popts, 222 dimm_params_t *pdimm, 223 unsigned int ctrl_num) 224 { 225 struct cpu_type *cpu; 226 int i; 227 popts->clk_adjust = 6; 228 popts->cpo_override = 0x1f; 229 popts->write_data_delay = 2; 230 popts->half_strength_driver_enable = 1; 231 /* Write leveling override */ 232 popts->wrlvl_en = 1; 233 popts->wrlvl_override = 1; 234 popts->wrlvl_sample = 0xf; 235 popts->wrlvl_start = 0x8; 236 popts->trwt_override = 1; 237 popts->trwt = 0; 238 239 cpu = gd->cpu; 240 /* P1014 and it's derivatives support max 16it DDR width */ 241 if (cpu->soc_ver == SVR_P1014) 242 popts->data_bus_width = DDR_DATA_BUS_WIDTH_16; 243 244 for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { 245 popts->cs_local_opts[i].odt_rd_cfg = FSL_DDR_ODT_NEVER; 246 popts->cs_local_opts[i].odt_wr_cfg = FSL_DDR_ODT_CS; 247 } 248 } 249 250 #endif /* CONFIG_SYS_DDR_RAW_TIMING */ 251