1 /* 2 * Keystone2: DDR3 SPD configuration 3 * 4 * (C) Copyright 2015-2016 Texas Instruments Incorporated, <www.ti.com> 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include <common.h> 10 11 #include <i2c.h> 12 #include <ddr_spd.h> 13 #include <asm/arch/ddr3.h> 14 #include <asm/arch/hardware.h> 15 16 #define DUMP_DDR_CONFIG 0 /* set to 1 to debug */ 17 #define debug_ddr_cfg(fmt, args...) \ 18 debug_cond(DUMP_DDR_CONFIG, fmt, ##args) 19 20 static void dump_phy_config(struct ddr3_phy_config *ptr) 21 { 22 debug_ddr_cfg("\npllcr 0x%08X\n", ptr->pllcr); 23 debug_ddr_cfg("pgcr1_mask 0x%08X\n", ptr->pgcr1_mask); 24 debug_ddr_cfg("pgcr1_val 0x%08X\n", ptr->pgcr1_val); 25 debug_ddr_cfg("ptr0 0x%08X\n", ptr->ptr0); 26 debug_ddr_cfg("ptr1 0x%08X\n", ptr->ptr1); 27 debug_ddr_cfg("ptr2 0x%08X\n", ptr->ptr2); 28 debug_ddr_cfg("ptr3 0x%08X\n", ptr->ptr3); 29 debug_ddr_cfg("ptr4 0x%08X\n", ptr->ptr4); 30 debug_ddr_cfg("dcr_mask 0x%08X\n", ptr->dcr_mask); 31 debug_ddr_cfg("dcr_val 0x%08X\n", ptr->dcr_val); 32 debug_ddr_cfg("dtpr0 0x%08X\n", ptr->dtpr0); 33 debug_ddr_cfg("dtpr1 0x%08X\n", ptr->dtpr1); 34 debug_ddr_cfg("dtpr2 0x%08X\n", ptr->dtpr2); 35 debug_ddr_cfg("mr0 0x%08X\n", ptr->mr0); 36 debug_ddr_cfg("mr1 0x%08X\n", ptr->mr1); 37 debug_ddr_cfg("mr2 0x%08X\n", ptr->mr2); 38 debug_ddr_cfg("dtcr 0x%08X\n", ptr->dtcr); 39 debug_ddr_cfg("pgcr2 0x%08X\n", ptr->pgcr2); 40 debug_ddr_cfg("zq0cr1 0x%08X\n", ptr->zq0cr1); 41 debug_ddr_cfg("zq1cr1 0x%08X\n", ptr->zq1cr1); 42 debug_ddr_cfg("zq2cr1 0x%08X\n", ptr->zq2cr1); 43 debug_ddr_cfg("pir_v1 0x%08X\n", ptr->pir_v1); 44 debug_ddr_cfg("pir_v2 0x%08X\n\n", ptr->pir_v2); 45 }; 46 47 static void dump_emif_config(struct ddr3_emif_config *ptr) 48 { 49 debug_ddr_cfg("\nsdcfg 0x%08X\n", ptr->sdcfg); 50 debug_ddr_cfg("sdtim1 0x%08X\n", ptr->sdtim1); 51 debug_ddr_cfg("sdtim2 0x%08X\n", ptr->sdtim2); 52 debug_ddr_cfg("sdtim3 0x%08X\n", ptr->sdtim3); 53 debug_ddr_cfg("sdtim4 0x%08X\n", ptr->sdtim4); 54 debug_ddr_cfg("zqcfg 0x%08X\n", ptr->zqcfg); 55 debug_ddr_cfg("sdrfc 0x%08X\n\n", ptr->sdrfc); 56 }; 57 58 #define TEMP NORMAL_TEMP 59 #define VBUS_CLKPERIOD 1.875 /* Corresponds to vbus=533MHz, */ 60 #define PLLGS_VAL (4000.0 / VBUS_CLKPERIOD) /* 4 us */ 61 #define PLLPD_VAL (1000.0 / VBUS_CLKPERIOD) /* 1 us */ 62 #define PLLLOCK_VAL (100000.0 / VBUS_CLKPERIOD) /* 100 us */ 63 #define PLLRST_VAL (9000.0 / VBUS_CLKPERIOD) /* 9 us */ 64 #define PHYRST_VAL 0x10 65 #define DDR_TERM RZQ_4_TERM 66 #define SDRAM_DRIVE RZQ_7_IMP 67 #define DYN_ODT ODT_DISABLE 68 69 enum srt { 70 NORMAL_TEMP, 71 EXTENDED_TEMP 72 }; 73 74 enum out_impedance { 75 RZQ_6_IMP = 0, 76 RZQ_7_IMP 77 }; 78 79 enum die_term { 80 ODT_DISABLE = 0, 81 RZQ_4_TERM, 82 RZQ_2_TERM, 83 RZQ_6_TERM, 84 RZQ_12_TERM, 85 RZQ_8_TERM 86 }; 87 88 struct ddr3_sodimm { 89 u32 t_ck; 90 u32 freqsel; 91 u32 t_xp; 92 u32 t_cke; 93 u32 t_pllpd; 94 u32 t_pllgs; 95 u32 t_phyrst; 96 u32 t_plllock; 97 u32 t_pllrst; 98 u32 t_rfc; 99 u32 t_xs; 100 u32 t_dinit0; 101 u32 t_dinit1; 102 u32 t_dinit2; 103 u32 t_dinit3; 104 u32 t_rtp; 105 u32 t_wtr; 106 u32 t_rp; 107 u32 t_rcd; 108 u32 t_ras; 109 u32 t_rrd; 110 u32 t_rc; 111 u32 t_faw; 112 u32 t_mrd; 113 u32 t_mod; 114 u32 t_wlo; 115 u32 t_wlmrd; 116 u32 t_xsdll; 117 u32 t_xpdll; 118 u32 t_ckesr; 119 u32 t_dllk; 120 u32 t_wr; 121 u32 t_wr_bin; 122 u32 cas; 123 u32 cwl; 124 u32 asr; 125 u32 pasr; 126 u32 t_refprd; 127 u8 sdram_type; 128 u8 ibank; 129 u8 pagesize; 130 u8 t_rrd2; 131 u8 t_ras_max; 132 u8 t_zqcs; 133 u32 refresh_rate; 134 u8 t_csta; 135 136 u8 rank; 137 u8 mirrored; 138 u8 buswidth; 139 }; 140 141 static u8 cas_latancy(u16 temp) 142 { 143 int loop; 144 u8 cas_bin = 0; 145 146 for (loop = 0; loop < 32; loop += 2, temp >>= 1) { 147 if (temp & 0x0001) 148 cas_bin = (loop > 15) ? loop - 15 : loop; 149 } 150 151 return cas_bin; 152 } 153 154 static int ddr3_get_size_in_mb(ddr3_spd_eeprom_t *buf) 155 { 156 return (((buf->organization & 0x38) >> 3) + 1) * 157 (256 << (buf->density_banks & 0xf)); 158 } 159 160 static int ddrtimingcalculation(ddr3_spd_eeprom_t *buf, struct ddr3_sodimm *spd, 161 struct ddr3_spd_cb *spd_cb) 162 { 163 u32 mtb, clk_freq; 164 165 if ((buf->mem_type != 0x0b) || 166 ((buf->density_banks & 0x70) != 0x00)) 167 return 1; 168 169 spd->sdram_type = 0x03; 170 spd->ibank = 0x03; 171 172 mtb = buf->mtb_dividend * 1000 / buf->mtb_divisor; 173 174 spd->t_ck = buf->tck_min * mtb; 175 176 spd_cb->ddrspdclock = 2000000 / spd->t_ck; 177 clk_freq = spd_cb->ddrspdclock / 2; 178 179 spd->rank = ((buf->organization & 0x38) >> 3) + 1; 180 if (spd->rank > 2) 181 return 1; 182 183 spd->pagesize = (buf->addressing & 0x07) + 1; 184 if (spd->pagesize > 3) 185 return 1; 186 187 spd->buswidth = 8 << (buf->bus_width & 0x7); 188 if ((spd->buswidth < 16) || (spd->buswidth > 64)) 189 return 1; 190 191 spd->mirrored = buf->mod_section.unbuffered.addr_mapping & 1; 192 193 printf("DDR3A Speed will be configured for %d Operation.\n", 194 spd_cb->ddrspdclock); 195 if (spd_cb->ddrspdclock == 1333) { 196 spd->t_xp = ((3 * spd->t_ck) > 6000) ? 197 3 : ((5999 / spd->t_ck) + 1); 198 spd->t_cke = ((3 * spd->t_ck) > 5625) ? 199 3 : ((5624 / spd->t_ck) + 1); 200 } else if (spd_cb->ddrspdclock == 1600) { 201 spd->t_xp = ((3 * spd->t_ck) > 6000) ? 202 3 : ((5999 / spd->t_ck) + 1); 203 spd->t_cke = ((3 * spd->t_ck) > 5000) ? 204 3 : ((4999 / spd->t_ck) + 1); 205 } else { 206 printf("Unsupported DDR3 speed %d\n", spd_cb->ddrspdclock); 207 return 1; 208 } 209 210 spd->t_xpdll = (spd->t_ck > 2400) ? 10 : 24000 / spd->t_ck; 211 spd->t_ckesr = spd->t_cke + 1; 212 213 /* SPD Calculated Values */ 214 spd->cas = cas_latancy((buf->caslat_msb << 8) | 215 buf->caslat_lsb); 216 217 spd->t_wr = (buf->twr_min * mtb) / spd->t_ck; 218 spd->t_wr_bin = (spd->t_wr / 2) & 0x07; 219 220 spd->t_rcd = ((buf->trcd_min * mtb) - 1) / spd->t_ck + 1; 221 spd->t_rrd = ((buf->trrd_min * mtb) - 1) / spd->t_ck + 1; 222 spd->t_rp = (((buf->trp_min * mtb) - 1) / spd->t_ck) + 1; 223 224 spd->t_ras = (((buf->tras_trc_ext & 0x0f) << 8 | buf->tras_min_lsb) * 225 mtb) / spd->t_ck; 226 227 spd->t_rc = (((((buf->tras_trc_ext & 0xf0) << 4) | buf->trc_min_lsb) * 228 mtb) - 1) / spd->t_ck + 1; 229 230 spd->t_rfc = (buf->trfc_min_lsb | (buf->trfc_min_msb << 8)) * mtb / 231 1000; 232 spd->t_wtr = (buf->twtr_min * mtb) / spd->t_ck; 233 spd->t_rtp = (buf->trtp_min * mtb) / spd->t_ck; 234 235 spd->t_xs = (((spd->t_rfc + 10) * 1000) / spd->t_ck); 236 spd->t_rfc = ((spd->t_rfc * 1000) - 1) / spd->t_ck + 1; 237 238 spd->t_faw = (((buf->tfaw_msb << 8) | buf->tfaw_min) * mtb) / spd->t_ck; 239 spd->t_rrd2 = ((((buf->tfaw_msb << 8) | 240 buf->tfaw_min) * mtb) / (4 * spd->t_ck)) - 1; 241 242 /* Hard-coded values */ 243 spd->t_mrd = 0x00; 244 spd->t_mod = 0x00; 245 spd->t_wlo = 0x0C; 246 spd->t_wlmrd = 0x28; 247 spd->t_xsdll = 0x200; 248 spd->t_ras_max = 0x0F; 249 spd->t_csta = 0x05; 250 spd->t_dllk = 0x200; 251 252 /* CAS Write Latency */ 253 if (spd->t_ck >= 2500) 254 spd->cwl = 0; 255 else if (spd->t_ck >= 1875) 256 spd->cwl = 1; 257 else if (spd->t_ck >= 1500) 258 spd->cwl = 2; 259 else if (spd->t_ck >= 1250) 260 spd->cwl = 3; 261 else if (spd->t_ck >= 1071) 262 spd->cwl = 4; 263 else 264 spd->cwl = 5; 265 266 /* SD:RAM Thermal and Refresh Options */ 267 spd->asr = (buf->therm_ref_opt & 0x04) >> 2; 268 spd->pasr = (buf->therm_ref_opt & 0x80) >> 7; 269 spd->t_zqcs = 64; 270 271 spd->t_refprd = (TEMP == NORMAL_TEMP) ? 7812500 : 3906250; 272 spd->t_refprd = spd->t_refprd / spd->t_ck; 273 274 spd->refresh_rate = spd->t_refprd; 275 spd->t_refprd = spd->t_refprd * 5; 276 277 /* Set MISC PHY space registers fields */ 278 if ((clk_freq / 2) >= 166 && (clk_freq / 2 < 275)) 279 spd->freqsel = 0x03; 280 else if ((clk_freq / 2) > 225 && (clk_freq / 2 < 385)) 281 spd->freqsel = 0x01; 282 else if ((clk_freq / 2) > 335 && (clk_freq / 2 < 534)) 283 spd->freqsel = 0x00; 284 285 spd->t_dinit0 = 500000000 / spd->t_ck; /* CKE low time 500 us */ 286 spd->t_dinit1 = spd->t_xs; 287 spd->t_dinit2 = 200000000 / spd->t_ck; /* Reset low time 200 us */ 288 /* Time from ZQ initialization command to first command (1 us) */ 289 spd->t_dinit3 = 1000000 / spd->t_ck; 290 291 spd->t_pllgs = PLLGS_VAL + 1; 292 spd->t_pllpd = PLLPD_VAL + 1; 293 spd->t_plllock = PLLLOCK_VAL + 1; 294 spd->t_pllrst = PLLRST_VAL; 295 spd->t_phyrst = PHYRST_VAL; 296 297 spd_cb->ddr_size_gbyte = ddr3_get_size_in_mb(buf) / 1024; 298 299 return 0; 300 } 301 302 static void init_ddr3param(struct ddr3_spd_cb *spd_cb, 303 struct ddr3_sodimm *spd) 304 { 305 spd_cb->phy_cfg.pllcr = (spd->freqsel & 3) << 18 | 0xE << 13; 306 spd_cb->phy_cfg.pgcr1_mask = (IODDRM_MASK | ZCKSEL_MASK); 307 spd_cb->phy_cfg.pgcr1_val = ((1 << 2) | (1 << 7) | (1 << 23)); 308 spd_cb->phy_cfg.ptr0 = ((spd->t_pllpd & 0x7ff) << 21) | 309 ((spd->t_pllgs & 0x7fff) << 6) | (spd->t_phyrst & 0x3f); 310 spd_cb->phy_cfg.ptr1 = ((spd->t_plllock & 0xffff) << 16) | 311 (spd->t_pllrst & 0x1fff); 312 spd_cb->phy_cfg.ptr2 = 0; 313 spd_cb->phy_cfg.ptr3 = ((spd->t_dinit1 & 0x1ff) << 20) | 314 (spd->t_dinit0 & 0xfffff); 315 spd_cb->phy_cfg.ptr4 = ((spd->t_dinit3 & 0x3ff) << 18) | 316 (spd->t_dinit2 & 0x3ffff); 317 318 spd_cb->phy_cfg.dcr_mask = PDQ_MASK | MPRDQ_MASK | BYTEMASK_MASK; 319 spd_cb->phy_cfg.dcr_val = 1 << 10; 320 321 if (spd->mirrored) { 322 spd_cb->phy_cfg.dcr_mask |= NOSRA_MASK | UDIMM_MASK; 323 spd_cb->phy_cfg.dcr_val |= (1 << 27) | (1 << 29); 324 } 325 326 spd_cb->phy_cfg.dtpr0 = (spd->t_rc & 0x3f) << 26 | 327 (spd->t_rrd & 0xf) << 22 | 328 (spd->t_ras & 0x3f) << 16 | (spd->t_rcd & 0xf) << 12 | 329 (spd->t_rp & 0xf) << 8 | (spd->t_wtr & 0xf) << 4 | 330 (spd->t_rtp & 0xf); 331 spd_cb->phy_cfg.dtpr1 = (spd->t_wlo & 0xf) << 26 | 332 (spd->t_wlmrd & 0x3f) << 20 | (spd->t_rfc & 0x1ff) << 11 | 333 (spd->t_faw & 0x3f) << 5 | (spd->t_mod & 0x7) << 2 | 334 (spd->t_mrd & 0x3); 335 336 spd_cb->phy_cfg.dtpr2 = 0 << 31 | 1 << 30 | 0 << 29 | 337 (spd->t_dllk & 0x3ff) << 19 | (spd->t_ckesr & 0xf) << 15; 338 339 spd_cb->phy_cfg.dtpr2 |= (((spd->t_xp > spd->t_xpdll) ? 340 spd->t_xp : spd->t_xpdll) & 341 0x1f) << 10; 342 343 spd_cb->phy_cfg.dtpr2 |= (((spd->t_xs > spd->t_xsdll) ? 344 spd->t_xs : spd->t_xsdll) & 345 0x3ff); 346 347 spd_cb->phy_cfg.mr0 = 1 << 12 | (spd->t_wr_bin & 0x7) << 9 | 0 << 8 | 348 0 << 7 | ((spd->cas & 0x0E) >> 1) << 4 | 0 << 3 | 349 (spd->cas & 0x01) << 2; 350 351 spd_cb->phy_cfg.mr1 = 0 << 12 | 0 << 11 | 0 << 7 | 0 << 3 | 352 ((DDR_TERM >> 2) & 1) << 9 | ((DDR_TERM >> 1) & 1) << 6 | 353 (DDR_TERM & 0x1) << 2 | ((SDRAM_DRIVE >> 1) & 1) << 5 | 354 (SDRAM_DRIVE & 1) << 1 | 0 << 0; 355 356 spd_cb->phy_cfg.mr2 = DYN_ODT << 9 | TEMP << 7 | (spd->asr & 1) << 6 | 357 (spd->cwl & 7) << 3 | (spd->pasr & 7); 358 359 spd_cb->phy_cfg.dtcr = (spd->rank == 2) ? 0x730035C7 : 0x710035C7; 360 spd_cb->phy_cfg.pgcr2 = (0xF << 20) | ((int)spd->t_refprd & 0x3ffff); 361 362 spd_cb->phy_cfg.zq0cr1 = 0x0000005D; 363 spd_cb->phy_cfg.zq1cr1 = 0x0000005B; 364 spd_cb->phy_cfg.zq2cr1 = 0x0000005B; 365 366 spd_cb->phy_cfg.pir_v1 = 0x00000033; 367 spd_cb->phy_cfg.pir_v2 = 0x0000FF81; 368 369 /* EMIF Registers */ 370 spd_cb->emif_cfg.sdcfg = spd->sdram_type << 29 | (DDR_TERM & 7) << 25 | 371 (DYN_ODT & 3) << 22 | (spd->cwl & 0x7) << 14 | 372 (spd->cas & 0xf) << 8 | (spd->ibank & 3) << 5 | 373 (spd->buswidth & 3) << 12 | (spd->pagesize & 3); 374 375 if (spd->rank == 2) 376 spd_cb->emif_cfg.sdcfg |= 1 << 3; 377 378 spd_cb->emif_cfg.sdtim1 = ((spd->t_wr - 1) & 0x1f) << 25 | 379 ((spd->t_ras - 1) & 0x7f) << 18 | 380 ((spd->t_rc - 1) & 0xff) << 10 | 381 (spd->t_rrd2 & 0x3f) << 4 | 382 ((spd->t_wtr - 1) & 0xf); 383 384 spd_cb->emif_cfg.sdtim2 = 0x07 << 10 | ((spd->t_rp - 1) & 0x1f) << 5 | 385 ((spd->t_rcd - 1) & 0x1f); 386 387 spd_cb->emif_cfg.sdtim3 = ((spd->t_xp - 2) & 0xf) << 28 | 388 ((spd->t_xs - 1) & 0x3ff) << 18 | 389 ((spd->t_xsdll - 1) & 0x3ff) << 8 | 390 ((spd->t_rtp - 1) & 0xf) << 4 | ((spd->t_cke) & 0xf); 391 392 spd_cb->emif_cfg.sdtim4 = (spd->t_csta & 0xf) << 28 | 393 ((spd->t_ckesr - 1) & 0xf) << 24 | 394 ((spd->t_zqcs - 1) & 0xff) << 16 | 395 ((spd->t_rfc - 1) & 0x3ff) << 4 | 396 (spd->t_ras_max & 0xf); 397 398 spd_cb->emif_cfg.sdrfc = (spd->refresh_rate - 1) & 0xffff; 399 400 /* TODO zqcfg value fixed ,May be required correction for K2E evm. */ 401 spd_cb->emif_cfg.zqcfg = (spd->rank == 2) ? 0xF0073200 : 0x70073200; 402 } 403 404 static int ddr3_read_spd(ddr3_spd_eeprom_t *spd_params) 405 { 406 int ret; 407 int old_bus; 408 409 i2c_init(CONFIG_SYS_DAVINCI_I2C_SPEED, CONFIG_SYS_DAVINCI_I2C_SLAVE); 410 411 old_bus = i2c_get_bus_num(); 412 i2c_set_bus_num(1); 413 414 ret = i2c_read(0x53, 0, 1, (unsigned char *)spd_params, 256); 415 416 i2c_set_bus_num(old_bus); 417 418 if (ret) { 419 printf("Cannot read DIMM params\n"); 420 return 1; 421 } 422 423 if (ddr3_spd_check(spd_params)) 424 return 1; 425 426 return 0; 427 } 428 429 int ddr3_get_size(void) 430 { 431 ddr3_spd_eeprom_t spd_params; 432 433 if (ddr3_read_spd(&spd_params)) 434 return 0; 435 436 return ddr3_get_size_in_mb(&spd_params) / 1024; 437 } 438 439 int ddr3_get_dimm_params_from_spd(struct ddr3_spd_cb *spd_cb) 440 { 441 struct ddr3_sodimm spd; 442 ddr3_spd_eeprom_t spd_params; 443 444 memset(&spd, 0, sizeof(spd)); 445 446 if (ddr3_read_spd(&spd_params)) 447 return 1; 448 449 if (ddrtimingcalculation(&spd_params, &spd, spd_cb)) { 450 printf("Timing caclulation error\n"); 451 return 1; 452 } 453 454 strncpy(spd_cb->dimm_name, (char *)spd_params.mpart, 18); 455 spd_cb->dimm_name[18] = '\0'; 456 457 init_ddr3param(spd_cb, &spd); 458 459 dump_emif_config(&spd_cb->emif_cfg); 460 dump_phy_config(&spd_cb->phy_cfg); 461 462 return 0; 463 } 464