1 /* 2 * Copyright 2008-2014 Freescale Semiconductor, Inc. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * Version 2 as published by the Free Software Foundation. 7 */ 8 9 /* 10 * Generic driver for Freescale DDR/DDR2/DDR3 memory controller. 11 * Based on code from spd_sdram.c 12 * Author: James Yang [at freescale.com] 13 */ 14 15 #include <common.h> 16 #include <i2c.h> 17 #include <fsl_ddr_sdram.h> 18 #include <fsl_ddr.h> 19 20 /* 21 * CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY is the physical address from the view 22 * of DDR controllers. It is the same as CONFIG_SYS_DDR_SDRAM_BASE for 23 * all Power SoCs. But it could be different for ARM SoCs. For example, 24 * fsl_lsch3 has a mapping mechanism to map DDR memory to ranges (in order) of 25 * 0x00_8000_0000 ~ 0x00_ffff_ffff 26 * 0x80_8000_0000 ~ 0xff_ffff_ffff 27 */ 28 #ifndef CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY 29 #define CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY CONFIG_SYS_DDR_SDRAM_BASE 30 #endif 31 32 #ifdef CONFIG_PPC 33 #include <asm/fsl_law.h> 34 35 void fsl_ddr_set_lawbar( 36 const common_timing_params_t *memctl_common_params, 37 unsigned int memctl_interleaved, 38 unsigned int ctrl_num); 39 #endif 40 41 void fsl_ddr_set_intl3r(const unsigned int granule_size); 42 #if defined(SPD_EEPROM_ADDRESS) || \ 43 defined(SPD_EEPROM_ADDRESS1) || defined(SPD_EEPROM_ADDRESS2) || \ 44 defined(SPD_EEPROM_ADDRESS3) || defined(SPD_EEPROM_ADDRESS4) 45 #if (CONFIG_NUM_DDR_CONTROLLERS == 1) && (CONFIG_DIMM_SLOTS_PER_CTLR == 1) 46 u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = { 47 [0][0] = SPD_EEPROM_ADDRESS, 48 }; 49 #elif (CONFIG_NUM_DDR_CONTROLLERS == 1) && (CONFIG_DIMM_SLOTS_PER_CTLR == 2) 50 u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = { 51 [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */ 52 [0][1] = SPD_EEPROM_ADDRESS2, /* controller 1 */ 53 }; 54 #elif (CONFIG_NUM_DDR_CONTROLLERS == 2) && (CONFIG_DIMM_SLOTS_PER_CTLR == 1) 55 u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = { 56 [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */ 57 [1][0] = SPD_EEPROM_ADDRESS2, /* controller 2 */ 58 }; 59 #elif (CONFIG_NUM_DDR_CONTROLLERS == 2) && (CONFIG_DIMM_SLOTS_PER_CTLR == 2) 60 u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = { 61 [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */ 62 [0][1] = SPD_EEPROM_ADDRESS2, /* controller 1 */ 63 [1][0] = SPD_EEPROM_ADDRESS3, /* controller 2 */ 64 [1][1] = SPD_EEPROM_ADDRESS4, /* controller 2 */ 65 }; 66 #elif (CONFIG_NUM_DDR_CONTROLLERS == 3) && (CONFIG_DIMM_SLOTS_PER_CTLR == 1) 67 u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = { 68 [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */ 69 [1][0] = SPD_EEPROM_ADDRESS2, /* controller 2 */ 70 [2][0] = SPD_EEPROM_ADDRESS3, /* controller 3 */ 71 }; 72 #elif (CONFIG_NUM_DDR_CONTROLLERS == 3) && (CONFIG_DIMM_SLOTS_PER_CTLR == 2) 73 u8 spd_i2c_addr[CONFIG_NUM_DDR_CONTROLLERS][CONFIG_DIMM_SLOTS_PER_CTLR] = { 74 [0][0] = SPD_EEPROM_ADDRESS1, /* controller 1 */ 75 [0][1] = SPD_EEPROM_ADDRESS2, /* controller 1 */ 76 [1][0] = SPD_EEPROM_ADDRESS3, /* controller 2 */ 77 [1][1] = SPD_EEPROM_ADDRESS4, /* controller 2 */ 78 [2][0] = SPD_EEPROM_ADDRESS5, /* controller 3 */ 79 [2][1] = SPD_EEPROM_ADDRESS6, /* controller 3 */ 80 }; 81 82 #endif 83 84 #define SPD_SPA0_ADDRESS 0x36 85 #define SPD_SPA1_ADDRESS 0x37 86 87 static void __get_spd(generic_spd_eeprom_t *spd, u8 i2c_address) 88 { 89 int ret; 90 #ifdef CONFIG_SYS_FSL_DDR4 91 uint8_t dummy = 0; 92 #endif 93 94 i2c_set_bus_num(CONFIG_SYS_SPD_BUS_NUM); 95 96 #ifdef CONFIG_SYS_FSL_DDR4 97 /* 98 * DDR4 SPD has 384 to 512 bytes 99 * To access the lower 256 bytes, we need to set EE page address to 0 100 * To access the upper 256 bytes, we need to set EE page address to 1 101 * See Jedec standar No. 21-C for detail 102 */ 103 i2c_write(SPD_SPA0_ADDRESS, 0, 1, &dummy, 1); 104 ret = i2c_read(i2c_address, 0, 1, (uchar *)spd, 256); 105 if (!ret) { 106 i2c_write(SPD_SPA1_ADDRESS, 0, 1, &dummy, 1); 107 ret = i2c_read(i2c_address, 0, 1, 108 (uchar *)((ulong)spd + 256), 109 min(256, 110 (int)sizeof(generic_spd_eeprom_t) - 256)); 111 } 112 #else 113 ret = i2c_read(i2c_address, 0, 1, (uchar *)spd, 114 sizeof(generic_spd_eeprom_t)); 115 #endif 116 117 if (ret) { 118 if (i2c_address == 119 #ifdef SPD_EEPROM_ADDRESS 120 SPD_EEPROM_ADDRESS 121 #elif defined(SPD_EEPROM_ADDRESS1) 122 SPD_EEPROM_ADDRESS1 123 #endif 124 ) { 125 printf("DDR: failed to read SPD from address %u\n", 126 i2c_address); 127 } else { 128 debug("DDR: failed to read SPD from address %u\n", 129 i2c_address); 130 } 131 memset(spd, 0, sizeof(generic_spd_eeprom_t)); 132 } 133 } 134 135 __attribute__((weak, alias("__get_spd"))) 136 void get_spd(generic_spd_eeprom_t *spd, u8 i2c_address); 137 138 /* This function allows boards to update SPD address */ 139 __weak void update_spd_address(unsigned int ctrl_num, 140 unsigned int slot, 141 unsigned int *addr) 142 { 143 } 144 145 void fsl_ddr_get_spd(generic_spd_eeprom_t *ctrl_dimms_spd, 146 unsigned int ctrl_num, unsigned int dimm_slots_per_ctrl) 147 { 148 unsigned int i; 149 unsigned int i2c_address = 0; 150 151 if (ctrl_num >= CONFIG_NUM_DDR_CONTROLLERS) { 152 printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num); 153 return; 154 } 155 156 for (i = 0; i < dimm_slots_per_ctrl; i++) { 157 i2c_address = spd_i2c_addr[ctrl_num][i]; 158 update_spd_address(ctrl_num, i, &i2c_address); 159 get_spd(&(ctrl_dimms_spd[i]), i2c_address); 160 } 161 } 162 #else 163 void fsl_ddr_get_spd(generic_spd_eeprom_t *ctrl_dimms_spd, 164 unsigned int ctrl_num, unsigned int dimm_slots_per_ctrl) 165 { 166 } 167 #endif /* SPD_EEPROM_ADDRESSx */ 168 169 /* 170 * ASSUMPTIONS: 171 * - Same number of CONFIG_DIMM_SLOTS_PER_CTLR on each controller 172 * - Same memory data bus width on all controllers 173 * 174 * NOTES: 175 * 176 * The memory controller and associated documentation use confusing 177 * terminology when referring to the orgranization of DRAM. 178 * 179 * Here is a terminology translation table: 180 * 181 * memory controller/documention |industry |this code |signals 182 * -------------------------------|-----------|-----------|----------------- 183 * physical bank/bank |rank |rank |chip select (CS) 184 * logical bank/sub-bank |bank |bank |bank address (BA) 185 * page/row |row |page |row address 186 * ??? |column |column |column address 187 * 188 * The naming confusion is further exacerbated by the descriptions of the 189 * memory controller interleaving feature, where accesses are interleaved 190 * _BETWEEN_ two seperate memory controllers. This is configured only in 191 * CS0_CONFIG[INTLV_CTL] of each memory controller. 192 * 193 * memory controller documentation | number of chip selects 194 * | per memory controller supported 195 * --------------------------------|----------------------------------------- 196 * cache line interleaving | 1 (CS0 only) 197 * page interleaving | 1 (CS0 only) 198 * bank interleaving | 1 (CS0 only) 199 * superbank interleraving | depends on bank (chip select) 200 * | interleraving [rank interleaving] 201 * | mode used on every memory controller 202 * 203 * Even further confusing is the existence of the interleaving feature 204 * _WITHIN_ each memory controller. The feature is referred to in 205 * documentation as chip select interleaving or bank interleaving, 206 * although it is configured in the DDR_SDRAM_CFG field. 207 * 208 * Name of field | documentation name | this code 209 * -----------------------------|-----------------------|------------------ 210 * DDR_SDRAM_CFG[BA_INTLV_CTL] | Bank (chip select) | rank interleaving 211 * | interleaving 212 */ 213 214 const char *step_string_tbl[] = { 215 "STEP_GET_SPD", 216 "STEP_COMPUTE_DIMM_PARMS", 217 "STEP_COMPUTE_COMMON_PARMS", 218 "STEP_GATHER_OPTS", 219 "STEP_ASSIGN_ADDRESSES", 220 "STEP_COMPUTE_REGS", 221 "STEP_PROGRAM_REGS", 222 "STEP_ALL" 223 }; 224 225 const char * step_to_string(unsigned int step) { 226 227 unsigned int s = __ilog2(step); 228 229 if ((1 << s) != step) 230 return step_string_tbl[7]; 231 232 if (s >= ARRAY_SIZE(step_string_tbl)) { 233 printf("Error for the step in %s\n", __func__); 234 s = 0; 235 } 236 237 return step_string_tbl[s]; 238 } 239 240 static unsigned long long __step_assign_addresses(fsl_ddr_info_t *pinfo, 241 unsigned int dbw_cap_adj[]) 242 { 243 unsigned int i, j; 244 unsigned long long total_mem, current_mem_base, total_ctlr_mem; 245 unsigned long long rank_density, ctlr_density = 0; 246 unsigned int first_ctrl = pinfo->first_ctrl; 247 unsigned int last_ctrl = first_ctrl + pinfo->num_ctrls - 1; 248 249 /* 250 * If a reduced data width is requested, but the SPD 251 * specifies a physically wider device, adjust the 252 * computed dimm capacities accordingly before 253 * assigning addresses. 254 */ 255 for (i = first_ctrl; i <= last_ctrl; i++) { 256 unsigned int found = 0; 257 258 switch (pinfo->memctl_opts[i].data_bus_width) { 259 case 2: 260 /* 16-bit */ 261 for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) { 262 unsigned int dw; 263 if (!pinfo->dimm_params[i][j].n_ranks) 264 continue; 265 dw = pinfo->dimm_params[i][j].primary_sdram_width; 266 if ((dw == 72 || dw == 64)) { 267 dbw_cap_adj[i] = 2; 268 break; 269 } else if ((dw == 40 || dw == 32)) { 270 dbw_cap_adj[i] = 1; 271 break; 272 } 273 } 274 break; 275 276 case 1: 277 /* 32-bit */ 278 for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) { 279 unsigned int dw; 280 dw = pinfo->dimm_params[i][j].data_width; 281 if (pinfo->dimm_params[i][j].n_ranks 282 && (dw == 72 || dw == 64)) { 283 /* 284 * FIXME: can't really do it 285 * like this because this just 286 * further reduces the memory 287 */ 288 found = 1; 289 break; 290 } 291 } 292 if (found) { 293 dbw_cap_adj[i] = 1; 294 } 295 break; 296 297 case 0: 298 /* 64-bit */ 299 break; 300 301 default: 302 printf("unexpected data bus width " 303 "specified controller %u\n", i); 304 return 1; 305 } 306 debug("dbw_cap_adj[%d]=%d\n", i, dbw_cap_adj[i]); 307 } 308 309 current_mem_base = pinfo->mem_base; 310 total_mem = 0; 311 if (pinfo->memctl_opts[first_ctrl].memctl_interleaving) { 312 rank_density = pinfo->dimm_params[first_ctrl][0].rank_density >> 313 dbw_cap_adj[first_ctrl]; 314 switch (pinfo->memctl_opts[first_ctrl].ba_intlv_ctl & 315 FSL_DDR_CS0_CS1_CS2_CS3) { 316 case FSL_DDR_CS0_CS1_CS2_CS3: 317 ctlr_density = 4 * rank_density; 318 break; 319 case FSL_DDR_CS0_CS1: 320 case FSL_DDR_CS0_CS1_AND_CS2_CS3: 321 ctlr_density = 2 * rank_density; 322 break; 323 case FSL_DDR_CS2_CS3: 324 default: 325 ctlr_density = rank_density; 326 break; 327 } 328 debug("rank density is 0x%llx, ctlr density is 0x%llx\n", 329 rank_density, ctlr_density); 330 for (i = first_ctrl; i <= last_ctrl; i++) { 331 if (pinfo->memctl_opts[i].memctl_interleaving) { 332 switch (pinfo->memctl_opts[i].memctl_interleaving_mode) { 333 case FSL_DDR_256B_INTERLEAVING: 334 case FSL_DDR_CACHE_LINE_INTERLEAVING: 335 case FSL_DDR_PAGE_INTERLEAVING: 336 case FSL_DDR_BANK_INTERLEAVING: 337 case FSL_DDR_SUPERBANK_INTERLEAVING: 338 total_ctlr_mem = 2 * ctlr_density; 339 break; 340 case FSL_DDR_3WAY_1KB_INTERLEAVING: 341 case FSL_DDR_3WAY_4KB_INTERLEAVING: 342 case FSL_DDR_3WAY_8KB_INTERLEAVING: 343 total_ctlr_mem = 3 * ctlr_density; 344 break; 345 case FSL_DDR_4WAY_1KB_INTERLEAVING: 346 case FSL_DDR_4WAY_4KB_INTERLEAVING: 347 case FSL_DDR_4WAY_8KB_INTERLEAVING: 348 total_ctlr_mem = 4 * ctlr_density; 349 break; 350 default: 351 panic("Unknown interleaving mode"); 352 } 353 pinfo->common_timing_params[i].base_address = 354 current_mem_base; 355 pinfo->common_timing_params[i].total_mem = 356 total_ctlr_mem; 357 total_mem = current_mem_base + total_ctlr_mem; 358 debug("ctrl %d base 0x%llx\n", i, current_mem_base); 359 debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem); 360 } else { 361 /* when 3rd controller not interleaved */ 362 current_mem_base = total_mem; 363 total_ctlr_mem = 0; 364 pinfo->common_timing_params[i].base_address = 365 current_mem_base; 366 for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) { 367 unsigned long long cap = 368 pinfo->dimm_params[i][j].capacity >> dbw_cap_adj[i]; 369 pinfo->dimm_params[i][j].base_address = 370 current_mem_base; 371 debug("ctrl %d dimm %d base 0x%llx\n", i, j, current_mem_base); 372 current_mem_base += cap; 373 total_ctlr_mem += cap; 374 } 375 debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem); 376 pinfo->common_timing_params[i].total_mem = 377 total_ctlr_mem; 378 total_mem += total_ctlr_mem; 379 } 380 } 381 } else { 382 /* 383 * Simple linear assignment if memory 384 * controllers are not interleaved. 385 */ 386 for (i = first_ctrl; i <= last_ctrl; i++) { 387 total_ctlr_mem = 0; 388 pinfo->common_timing_params[i].base_address = 389 current_mem_base; 390 for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) { 391 /* Compute DIMM base addresses. */ 392 unsigned long long cap = 393 pinfo->dimm_params[i][j].capacity >> dbw_cap_adj[i]; 394 pinfo->dimm_params[i][j].base_address = 395 current_mem_base; 396 debug("ctrl %d dimm %d base 0x%llx\n", i, j, current_mem_base); 397 current_mem_base += cap; 398 total_ctlr_mem += cap; 399 } 400 debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem); 401 pinfo->common_timing_params[i].total_mem = 402 total_ctlr_mem; 403 total_mem += total_ctlr_mem; 404 } 405 } 406 debug("Total mem by %s is 0x%llx\n", __func__, total_mem); 407 408 return total_mem; 409 } 410 411 /* Use weak function to allow board file to override the address assignment */ 412 __attribute__((weak, alias("__step_assign_addresses"))) 413 unsigned long long step_assign_addresses(fsl_ddr_info_t *pinfo, 414 unsigned int dbw_cap_adj[]); 415 416 unsigned long long 417 fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step, 418 unsigned int size_only) 419 { 420 unsigned int i, j; 421 unsigned long long total_mem = 0; 422 int assert_reset = 0; 423 unsigned int first_ctrl = pinfo->first_ctrl; 424 unsigned int last_ctrl = first_ctrl + pinfo->num_ctrls - 1; 425 __maybe_unused int retval; 426 __maybe_unused bool goodspd = false; 427 __maybe_unused int dimm_slots_per_ctrl = pinfo->dimm_slots_per_ctrl; 428 429 fsl_ddr_cfg_regs_t *ddr_reg = pinfo->fsl_ddr_config_reg; 430 common_timing_params_t *timing_params = pinfo->common_timing_params; 431 if (pinfo->board_need_mem_reset) 432 assert_reset = pinfo->board_need_mem_reset(); 433 434 /* data bus width capacity adjust shift amount */ 435 unsigned int dbw_capacity_adjust[CONFIG_NUM_DDR_CONTROLLERS]; 436 437 for (i = first_ctrl; i <= last_ctrl; i++) 438 dbw_capacity_adjust[i] = 0; 439 440 debug("starting at step %u (%s)\n", 441 start_step, step_to_string(start_step)); 442 443 switch (start_step) { 444 case STEP_GET_SPD: 445 #if defined(CONFIG_DDR_SPD) || defined(CONFIG_SPD_EEPROM) 446 /* STEP 1: Gather all DIMM SPD data */ 447 for (i = first_ctrl; i <= last_ctrl; i++) { 448 fsl_ddr_get_spd(pinfo->spd_installed_dimms[i], i, 449 dimm_slots_per_ctrl); 450 } 451 452 case STEP_COMPUTE_DIMM_PARMS: 453 /* STEP 2: Compute DIMM parameters from SPD data */ 454 455 for (i = first_ctrl; i <= last_ctrl; i++) { 456 for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) { 457 generic_spd_eeprom_t *spd = 458 &(pinfo->spd_installed_dimms[i][j]); 459 dimm_params_t *pdimm = 460 &(pinfo->dimm_params[i][j]); 461 retval = compute_dimm_parameters( 462 i, spd, pdimm, j); 463 #ifdef CONFIG_SYS_DDR_RAW_TIMING 464 if (!j && retval) { 465 printf("SPD error on controller %d! " 466 "Trying fallback to raw timing " 467 "calculation\n", i); 468 retval = fsl_ddr_get_dimm_params(pdimm, 469 i, j); 470 } 471 #else 472 if (retval == 2) { 473 printf("Error: compute_dimm_parameters" 474 " non-zero returned FATAL value " 475 "for memctl=%u dimm=%u\n", i, j); 476 return 0; 477 } 478 #endif 479 if (retval) { 480 debug("Warning: compute_dimm_parameters" 481 " non-zero return value for memctl=%u " 482 "dimm=%u\n", i, j); 483 } else { 484 goodspd = true; 485 } 486 } 487 } 488 if (!goodspd) { 489 /* 490 * No valid SPD found 491 * Throw an error if this is for main memory, i.e. 492 * first_ctrl == 0. Otherwise, siliently return 0 493 * as the memory size. 494 */ 495 if (first_ctrl == 0) 496 printf("Error: No valid SPD detected.\n"); 497 498 return 0; 499 } 500 #elif defined(CONFIG_SYS_DDR_RAW_TIMING) 501 case STEP_COMPUTE_DIMM_PARMS: 502 for (i = first_ctrl; i <= last_ctrl; i++) { 503 for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) { 504 dimm_params_t *pdimm = 505 &(pinfo->dimm_params[i][j]); 506 fsl_ddr_get_dimm_params(pdimm, i, j); 507 } 508 } 509 debug("Filling dimm parameters from board specific file\n"); 510 #endif 511 case STEP_COMPUTE_COMMON_PARMS: 512 /* 513 * STEP 3: Compute a common set of timing parameters 514 * suitable for all of the DIMMs on each memory controller 515 */ 516 for (i = first_ctrl; i <= last_ctrl; i++) { 517 debug("Computing lowest common DIMM" 518 " parameters for memctl=%u\n", i); 519 compute_lowest_common_dimm_parameters 520 (i, 521 pinfo->dimm_params[i], 522 &timing_params[i], 523 CONFIG_DIMM_SLOTS_PER_CTLR); 524 } 525 526 case STEP_GATHER_OPTS: 527 /* STEP 4: Gather configuration requirements from user */ 528 for (i = first_ctrl; i <= last_ctrl; i++) { 529 debug("Reloading memory controller " 530 "configuration options for memctl=%u\n", i); 531 /* 532 * This "reloads" the memory controller options 533 * to defaults. If the user "edits" an option, 534 * next_step points to the step after this, 535 * which is currently STEP_ASSIGN_ADDRESSES. 536 */ 537 populate_memctl_options( 538 &timing_params[i], 539 &pinfo->memctl_opts[i], 540 pinfo->dimm_params[i], i); 541 /* 542 * For RDIMMs, JEDEC spec requires clocks to be stable 543 * before reset signal is deasserted. For the boards 544 * using fixed parameters, this function should be 545 * be called from board init file. 546 */ 547 if (timing_params[i].all_dimms_registered) 548 assert_reset = 1; 549 } 550 if (assert_reset && !size_only) { 551 if (pinfo->board_mem_reset) { 552 debug("Asserting mem reset\n"); 553 pinfo->board_mem_reset(); 554 } else { 555 debug("Asserting mem reset missing\n"); 556 } 557 } 558 559 case STEP_ASSIGN_ADDRESSES: 560 /* STEP 5: Assign addresses to chip selects */ 561 check_interleaving_options(pinfo); 562 total_mem = step_assign_addresses(pinfo, dbw_capacity_adjust); 563 debug("Total mem %llu assigned\n", total_mem); 564 565 case STEP_COMPUTE_REGS: 566 /* STEP 6: compute controller register values */ 567 debug("FSL Memory ctrl register computation\n"); 568 for (i = first_ctrl; i <= last_ctrl; i++) { 569 if (timing_params[i].ndimms_present == 0) { 570 memset(&ddr_reg[i], 0, 571 sizeof(fsl_ddr_cfg_regs_t)); 572 continue; 573 } 574 575 compute_fsl_memctl_config_regs 576 (i, 577 &pinfo->memctl_opts[i], 578 &ddr_reg[i], &timing_params[i], 579 pinfo->dimm_params[i], 580 dbw_capacity_adjust[i], 581 size_only); 582 } 583 584 default: 585 break; 586 } 587 588 { 589 /* 590 * Compute the amount of memory available just by 591 * looking for the highest valid CSn_BNDS value. 592 * This allows us to also experiment with using 593 * only CS0 when using dual-rank DIMMs. 594 */ 595 unsigned int max_end = 0; 596 597 for (i = first_ctrl; i <= last_ctrl; i++) { 598 for (j = 0; j < CONFIG_CHIP_SELECTS_PER_CTRL; j++) { 599 fsl_ddr_cfg_regs_t *reg = &ddr_reg[i]; 600 if (reg->cs[j].config & 0x80000000) { 601 unsigned int end; 602 /* 603 * 0xfffffff is a special value we put 604 * for unused bnds 605 */ 606 if (reg->cs[j].bnds == 0xffffffff) 607 continue; 608 end = reg->cs[j].bnds & 0xffff; 609 if (end > max_end) { 610 max_end = end; 611 } 612 } 613 } 614 } 615 616 total_mem = 1 + (((unsigned long long)max_end << 24ULL) | 617 0xFFFFFFULL) - pinfo->mem_base; 618 } 619 620 return total_mem; 621 } 622 623 phys_size_t __fsl_ddr_sdram(fsl_ddr_info_t *pinfo) 624 { 625 unsigned int i, first_ctrl, last_ctrl; 626 #ifdef CONFIG_PPC 627 unsigned int law_memctl = LAW_TRGT_IF_DDR_1; 628 #endif 629 unsigned long long total_memory; 630 int deassert_reset = 0; 631 632 first_ctrl = pinfo->first_ctrl; 633 last_ctrl = first_ctrl + pinfo->num_ctrls - 1; 634 635 /* Compute it once normally. */ 636 #ifdef CONFIG_FSL_DDR_INTERACTIVE 637 if (tstc() && (getc() == 'd')) { /* we got a key press of 'd' */ 638 total_memory = fsl_ddr_interactive(pinfo, 0); 639 } else if (fsl_ddr_interactive_env_var_exists()) { 640 total_memory = fsl_ddr_interactive(pinfo, 1); 641 } else 642 #endif 643 total_memory = fsl_ddr_compute(pinfo, STEP_GET_SPD, 0); 644 645 /* setup 3-way interleaving before enabling DDRC */ 646 switch (pinfo->memctl_opts[first_ctrl].memctl_interleaving_mode) { 647 case FSL_DDR_3WAY_1KB_INTERLEAVING: 648 case FSL_DDR_3WAY_4KB_INTERLEAVING: 649 case FSL_DDR_3WAY_8KB_INTERLEAVING: 650 fsl_ddr_set_intl3r( 651 pinfo->memctl_opts[first_ctrl]. 652 memctl_interleaving_mode); 653 break; 654 default: 655 break; 656 } 657 658 /* 659 * Program configuration registers. 660 * JEDEC specs requires clocks to be stable before deasserting reset 661 * for RDIMMs. Clocks start after chip select is enabled and clock 662 * control register is set. During step 1, all controllers have their 663 * registers set but not enabled. Step 2 proceeds after deasserting 664 * reset through board FPGA or GPIO. 665 * For non-registered DIMMs, initialization can go through but it is 666 * also OK to follow the same flow. 667 */ 668 if (pinfo->board_need_mem_reset) 669 deassert_reset = pinfo->board_need_mem_reset(); 670 for (i = first_ctrl; i <= last_ctrl; i++) { 671 if (pinfo->common_timing_params[i].all_dimms_registered) 672 deassert_reset = 1; 673 } 674 for (i = first_ctrl; i <= last_ctrl; i++) { 675 debug("Programming controller %u\n", i); 676 if (pinfo->common_timing_params[i].ndimms_present == 0) { 677 debug("No dimms present on controller %u; " 678 "skipping programming\n", i); 679 continue; 680 } 681 /* 682 * The following call with step = 1 returns before enabling 683 * the controller. It has to finish with step = 2 later. 684 */ 685 fsl_ddr_set_memctl_regs(&(pinfo->fsl_ddr_config_reg[i]), i, 686 deassert_reset ? 1 : 0); 687 } 688 if (deassert_reset) { 689 /* Use board FPGA or GPIO to deassert reset signal */ 690 if (pinfo->board_mem_de_reset) { 691 debug("Deasserting mem reset\n"); 692 pinfo->board_mem_de_reset(); 693 } else { 694 debug("Deasserting mem reset missing\n"); 695 } 696 for (i = first_ctrl; i <= last_ctrl; i++) { 697 /* Call with step = 2 to continue initialization */ 698 fsl_ddr_set_memctl_regs(&(pinfo->fsl_ddr_config_reg[i]), 699 i, 2); 700 } 701 } 702 703 #ifdef CONFIG_FSL_DDR_SYNC_REFRESH 704 fsl_ddr_sync_memctl_refresh(first_ctrl, last_ctrl); 705 #endif 706 707 #ifdef CONFIG_PPC 708 /* program LAWs */ 709 for (i = first_ctrl; i <= last_ctrl; i++) { 710 if (pinfo->memctl_opts[i].memctl_interleaving) { 711 switch (pinfo->memctl_opts[i]. 712 memctl_interleaving_mode) { 713 case FSL_DDR_CACHE_LINE_INTERLEAVING: 714 case FSL_DDR_PAGE_INTERLEAVING: 715 case FSL_DDR_BANK_INTERLEAVING: 716 case FSL_DDR_SUPERBANK_INTERLEAVING: 717 if (i % 2) 718 break; 719 if (i == 0) { 720 law_memctl = LAW_TRGT_IF_DDR_INTRLV; 721 fsl_ddr_set_lawbar( 722 &pinfo->common_timing_params[i], 723 law_memctl, i); 724 } 725 #if CONFIG_NUM_DDR_CONTROLLERS > 3 726 else if (i == 2) { 727 law_memctl = LAW_TRGT_IF_DDR_INTLV_34; 728 fsl_ddr_set_lawbar( 729 &pinfo->common_timing_params[i], 730 law_memctl, i); 731 } 732 #endif 733 break; 734 case FSL_DDR_3WAY_1KB_INTERLEAVING: 735 case FSL_DDR_3WAY_4KB_INTERLEAVING: 736 case FSL_DDR_3WAY_8KB_INTERLEAVING: 737 law_memctl = LAW_TRGT_IF_DDR_INTLV_123; 738 if (i == 0) { 739 fsl_ddr_set_lawbar( 740 &pinfo->common_timing_params[i], 741 law_memctl, i); 742 } 743 break; 744 case FSL_DDR_4WAY_1KB_INTERLEAVING: 745 case FSL_DDR_4WAY_4KB_INTERLEAVING: 746 case FSL_DDR_4WAY_8KB_INTERLEAVING: 747 law_memctl = LAW_TRGT_IF_DDR_INTLV_1234; 748 if (i == 0) 749 fsl_ddr_set_lawbar( 750 &pinfo->common_timing_params[i], 751 law_memctl, i); 752 /* place holder for future 4-way interleaving */ 753 break; 754 default: 755 break; 756 } 757 } else { 758 switch (i) { 759 case 0: 760 law_memctl = LAW_TRGT_IF_DDR_1; 761 break; 762 case 1: 763 law_memctl = LAW_TRGT_IF_DDR_2; 764 break; 765 case 2: 766 law_memctl = LAW_TRGT_IF_DDR_3; 767 break; 768 case 3: 769 law_memctl = LAW_TRGT_IF_DDR_4; 770 break; 771 default: 772 break; 773 } 774 fsl_ddr_set_lawbar(&pinfo->common_timing_params[i], 775 law_memctl, i); 776 } 777 } 778 #endif 779 780 debug("total_memory by %s = %llu\n", __func__, total_memory); 781 782 #if !defined(CONFIG_PHYS_64BIT) 783 /* Check for 4G or more. Bad. */ 784 if ((first_ctrl == 0) && (total_memory >= (1ull << 32))) { 785 puts("Detected "); 786 print_size(total_memory, " of memory\n"); 787 printf(" This U-Boot only supports < 4G of DDR\n"); 788 printf(" You could rebuild it with CONFIG_PHYS_64BIT\n"); 789 printf(" "); /* re-align to match init_func_ram print */ 790 total_memory = CONFIG_MAX_MEM_MAPPED; 791 } 792 #endif 793 794 return total_memory; 795 } 796 797 /* 798 * fsl_ddr_sdram(void) -- this is the main function to be 799 * called by initdram() in the board file. 800 * 801 * It returns amount of memory configured in bytes. 802 */ 803 phys_size_t fsl_ddr_sdram(void) 804 { 805 fsl_ddr_info_t info; 806 807 /* Reset info structure. */ 808 memset(&info, 0, sizeof(fsl_ddr_info_t)); 809 info.mem_base = CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY; 810 info.first_ctrl = 0; 811 info.num_ctrls = CONFIG_SYS_FSL_DDR_MAIN_NUM_CTRLS; 812 info.dimm_slots_per_ctrl = CONFIG_DIMM_SLOTS_PER_CTLR; 813 info.board_need_mem_reset = board_need_mem_reset; 814 info.board_mem_reset = board_assert_mem_reset; 815 info.board_mem_de_reset = board_deassert_mem_reset; 816 817 return __fsl_ddr_sdram(&info); 818 } 819 820 #ifdef CONFIG_SYS_FSL_OTHER_DDR_NUM_CTRLS 821 phys_size_t fsl_other_ddr_sdram(unsigned long long base, 822 unsigned int first_ctrl, 823 unsigned int num_ctrls, 824 unsigned int dimm_slots_per_ctrl, 825 int (*board_need_reset)(void), 826 void (*board_reset)(void), 827 void (*board_de_reset)(void)) 828 { 829 fsl_ddr_info_t info; 830 831 /* Reset info structure. */ 832 memset(&info, 0, sizeof(fsl_ddr_info_t)); 833 info.mem_base = base; 834 info.first_ctrl = first_ctrl; 835 info.num_ctrls = num_ctrls; 836 info.dimm_slots_per_ctrl = dimm_slots_per_ctrl; 837 info.board_need_mem_reset = board_need_reset; 838 info.board_mem_reset = board_reset; 839 info.board_mem_de_reset = board_de_reset; 840 841 return __fsl_ddr_sdram(&info); 842 } 843 #endif 844 845 /* 846 * fsl_ddr_sdram_size(first_ctrl, last_intlv) - This function only returns the 847 * size of the total memory without setting ddr control registers. 848 */ 849 phys_size_t 850 fsl_ddr_sdram_size(void) 851 { 852 fsl_ddr_info_t info; 853 unsigned long long total_memory = 0; 854 855 memset(&info, 0 , sizeof(fsl_ddr_info_t)); 856 info.mem_base = CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY; 857 info.first_ctrl = 0; 858 info.num_ctrls = CONFIG_SYS_FSL_DDR_MAIN_NUM_CTRLS; 859 info.dimm_slots_per_ctrl = CONFIG_DIMM_SLOTS_PER_CTLR; 860 info.board_need_mem_reset = NULL; 861 862 /* Compute it once normally. */ 863 total_memory = fsl_ddr_compute(&info, STEP_GET_SPD, 1); 864 865 return total_memory; 866 } 867