arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c

   1 /*
   2  * Copyright 2008-2012 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 /*
   8  * Generic driver for Freescale DDR/DDR2/DDR3 memory controller.
   9  * Based on code from spd_sdram.c
  10  * Author: James Yang [at freescale.com]
  11  */
  12
  13 #include <common.h>
  14 #include <asm/fsl_ddr_sdram.h>
  15
  16 #include "ddr.h"
  17
  18 #define _DDR_ADDR CONFIG_SYS_MPC8xxx_DDR_ADDR
  19
  20 static u32 fsl_ddr_get_version(void)
  21 {
  22         ccsr_ddr_t *ddr;
  23         u32 ver_major_minor_errata;
  24
  25         ddr = (void *)_DDR_ADDR;
  26         ver_major_minor_errata = (in_be32(&ddr->ip_rev1) & 0xFFFF) << 8;
  27         ver_major_minor_errata |= (in_be32(&ddr->ip_rev2) & 0xFF00) >> 8;
  28
  29         return ver_major_minor_errata;
  30 }
  31
  32 unsigned int picos_to_mclk(unsigned int picos);
  33
  34 /*
  35  * Determine Rtt value.
  36  *
  37  * This should likely be either board or controller specific.
  38  *
  39  * Rtt(nominal) - DDR2:
  40  *      0 = Rtt disabled
  41  *      1 = 75 ohm
  42  *      2 = 150 ohm
  43  *      3 = 50 ohm
  44  * Rtt(nominal) - DDR3:
  45  *      0 = Rtt disabled
  46  *      1 = 60 ohm
  47  *      2 = 120 ohm
  48  *      3 = 40 ohm
  49  *      4 = 20 ohm
  50  *      5 = 30 ohm
  51  *
  52  * FIXME: Apparently 8641 needs a value of 2
  53  * FIXME: Old code seys if 667 MHz or higher, use 3 on 8572
  54  *
  55  * FIXME: There was some effort down this line earlier:
  56  *
  57  *      unsigned int i;
  58  *      for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL/2; i++) {
  59  *              if (popts->dimmslot[i].num_valid_cs
  60  *                  && (popts->cs_local_opts[2*i].odt_rd_cfg
  61  *                      || popts->cs_local_opts[2*i].odt_wr_cfg)) {
  62  *                      rtt = 2;
  63  *                      break;
  64  *              }
  65  *      }
  66  */
  67 static inline int fsl_ddr_get_rtt(void)
  68 {
  69         int rtt;
  70
  71 #if defined(CONFIG_FSL_DDR1)
  72         rtt = 0;
  73 #elif defined(CONFIG_FSL_DDR2)
  74         rtt = 3;
  75 #else
  76         rtt = 0;
  77 #endif
  78
  79         return rtt;
  80 }
  81
  82 /*
  83  * compute the CAS write latency according to DDR3 spec
  84  * CWL = 5 if tCK >= 2.5ns
  85  *       6 if 2.5ns > tCK >= 1.875ns
  86  *       7 if 1.875ns > tCK >= 1.5ns
  87  *       8 if 1.5ns > tCK >= 1.25ns
  88  *       9 if 1.25ns > tCK >= 1.07ns
  89  *       10 if 1.07ns > tCK >= 0.935ns
  90  *       11 if 0.935ns > tCK >= 0.833ns
  91  *       12 if 0.833ns > tCK >= 0.75ns
  92  */
  93 static inline unsigned int compute_cas_write_latency(void)
  94 {
  95         unsigned int cwl;
  96         const unsigned int mclk_ps = get_memory_clk_period_ps();
  97
  98         if (mclk_ps >= 2500)
  99                 cwl = 5;
 100         else if (mclk_ps >= 1875)
 101                 cwl = 6;
 102         else if (mclk_ps >= 1500)
 103                 cwl = 7;
 104         else if (mclk_ps >= 1250)
 105                 cwl = 8;
 106         else if (mclk_ps >= 1070)
 107                 cwl = 9;
 108         else if (mclk_ps >= 935)
 109                 cwl = 10;
 110         else if (mclk_ps >= 833)
 111                 cwl = 11;
 112         else if (mclk_ps >= 750)
 113                 cwl = 12;
 114         else {
 115                 cwl = 12;
 116                 printf("Warning: CWL is out of range\n");
 117         }
 118         return cwl;
 119 }
 120
 121 /* Chip Select Configuration (CSn_CONFIG) */
 122 static void set_csn_config(int dimm_number, int i, fsl_ddr_cfg_regs_t *ddr,
 123                                const memctl_options_t *popts,
 124                                const dimm_params_t *dimm_params)
 125 {
 126         unsigned int cs_n_en = 0; /* Chip Select enable */
 127         unsigned int intlv_en = 0; /* Memory controller interleave enable */
 128         unsigned int intlv_ctl = 0; /* Interleaving control */
 129         unsigned int ap_n_en = 0; /* Chip select n auto-precharge enable */
 130         unsigned int odt_rd_cfg = 0; /* ODT for reads configuration */
 131         unsigned int odt_wr_cfg = 0; /* ODT for writes configuration */
 132         unsigned int ba_bits_cs_n = 0; /* Num of bank bits for SDRAM on CSn */
 133         unsigned int row_bits_cs_n = 0; /* Num of row bits for SDRAM on CSn */
 134         unsigned int col_bits_cs_n = 0; /* Num of ocl bits for SDRAM on CSn */
 135         int go_config = 0;
 136
 137         /* Compute CS_CONFIG only for existing ranks of each DIMM.  */
 138         switch (i) {
 139         case 0:
 140                 if (dimm_params[dimm_number].n_ranks > 0) {
 141                         go_config = 1;
 142                         /* These fields only available in CS0_CONFIG */
 143                         if (!popts->memctl_interleaving)
 144                                 break;
 145                         switch (popts->memctl_interleaving_mode) {
 146                         case FSL_DDR_CACHE_LINE_INTERLEAVING:
 147                         case FSL_DDR_PAGE_INTERLEAVING:
 148                         case FSL_DDR_BANK_INTERLEAVING:
 149                         case FSL_DDR_SUPERBANK_INTERLEAVING:
 150                                 intlv_en = popts->memctl_interleaving;
 151                                 intlv_ctl = popts->memctl_interleaving_mode;
 152                                 break;
 153                         default:
 154                                 break;
 155                         }
 156                 }
 157                 break;
 158         case 1:
 159                 if ((dimm_number == 0 && dimm_params[0].n_ranks > 1) || \
 160                     (dimm_number == 1 && dimm_params[1].n_ranks > 0))
 161                         go_config = 1;
 162                 break;
 163         case 2:
 164                 if ((dimm_number == 0 && dimm_params[0].n_ranks > 2) || \
 165                    (dimm_number >= 1 && dimm_params[dimm_number].n_ranks > 0))
 166                         go_config = 1;
 167                 break;
 168         case 3:
 169                 if ((dimm_number == 0 && dimm_params[0].n_ranks > 3) || \
 170                     (dimm_number == 1 && dimm_params[1].n_ranks > 1) || \
 171                     (dimm_number == 3 && dimm_params[3].n_ranks > 0))
 172                         go_config = 1;
 173                 break;
 174         default:
 175                 break;
 176         }
 177         if (go_config) {
 178                 unsigned int n_banks_per_sdram_device;
 179                 cs_n_en = 1;
 180                 ap_n_en = popts->cs_local_opts[i].auto_precharge;
 181                 odt_rd_cfg = popts->cs_local_opts[i].odt_rd_cfg;
 182                 odt_wr_cfg = popts->cs_local_opts[i].odt_wr_cfg;
 183                 n_banks_per_sdram_device
 184                         = dimm_params[dimm_number].n_banks_per_sdram_device;
 185                 ba_bits_cs_n = __ilog2(n_banks_per_sdram_device) - 2;
 186                 row_bits_cs_n = dimm_params[dimm_number].n_row_addr - 12;
 187                 col_bits_cs_n = dimm_params[dimm_number].n_col_addr - 8;
 188         }
 189         ddr->cs[i].config = (0
 190                 | ((cs_n_en & 0x1) << 31)
 191                 | ((intlv_en & 0x3) << 29)
 192                 | ((intlv_ctl & 0xf) << 24)
 193                 | ((ap_n_en & 0x1) << 23)
 194
 195                 /* XXX: some implementation only have 1 bit starting at left */
 196                 | ((odt_rd_cfg & 0x7) << 20)
 197
 198                 /* XXX: Some implementation only have 1 bit starting at left */
 199                 | ((odt_wr_cfg & 0x7) << 16)
 200
 201                 | ((ba_bits_cs_n & 0x3) << 14)
 202                 | ((row_bits_cs_n & 0x7) << 8)
 203                 | ((col_bits_cs_n & 0x7) << 0)
 204                 );
 205         debug("FSLDDR: cs[%d]_config = 0x%08x\n", i,ddr->cs[i].config);
 206 }
 207
 208 /* Chip Select Configuration 2 (CSn_CONFIG_2) */
 209 /* FIXME: 8572 */
 210 static void set_csn_config_2(int i, fsl_ddr_cfg_regs_t *ddr)
 211 {
 212         unsigned int pasr_cfg = 0;      /* Partial array self refresh config */
 213
 214         ddr->cs[i].config_2 = ((pasr_cfg & 7) << 24);
 215         debug("FSLDDR: cs[%d]_config_2 = 0x%08x\n", i, ddr->cs[i].config_2);
 216 }
 217
 218 /* -3E = 667 CL5, -25 = CL6 800, -25E = CL5 800 */
 219
 220 #if !defined(CONFIG_FSL_DDR1)
 221 static inline int avoid_odt_overlap(const dimm_params_t *dimm_params)
 222 {
 223 #if CONFIG_DIMM_SLOTS_PER_CTLR == 1
 224         if (dimm_params[0].n_ranks == 4)
 225                 return 1;
 226 #endif
 227
 228 #if CONFIG_DIMM_SLOTS_PER_CTLR == 2
 229         if ((dimm_params[0].n_ranks == 2) &&
 230                 (dimm_params[1].n_ranks == 2))
 231                 return 1;
 232
 233 #ifdef CONFIG_FSL_DDR_FIRST_SLOT_QUAD_CAPABLE
 234         if (dimm_params[0].n_ranks == 4)
 235                 return 1;
 236 #endif
 237 #endif
 238         return 0;
 239 }
 240
 241 /*
 242  * DDR SDRAM Timing Configuration 0 (TIMING_CFG_0)
 243  *
 244  * Avoid writing for DDR I.  The new PQ38 DDR controller
 245  * dreams up non-zero default values to be backwards compatible.
 246  */
 247 static void set_timing_cfg_0(fsl_ddr_cfg_regs_t *ddr,
 248                                 const memctl_options_t *popts,
 249                                 const dimm_params_t *dimm_params)
 250 {
 251         unsigned char trwt_mclk = 0;   /* Read-to-write turnaround */
 252         unsigned char twrt_mclk = 0;   /* Write-to-read turnaround */
 253         /* 7.5 ns on -3E; 0 means WL - CL + BL/2 + 1 */
 254         unsigned char trrt_mclk = 0;   /* Read-to-read turnaround */
 255         unsigned char twwt_mclk = 0;   /* Write-to-write turnaround */
 256
 257         /* Active powerdown exit timing (tXARD and tXARDS). */
 258         unsigned char act_pd_exit_mclk;
 259         /* Precharge powerdown exit timing (tXP). */
 260         unsigned char pre_pd_exit_mclk;
 261         /* ODT powerdown exit timing (tAXPD). */
 262         unsigned char taxpd_mclk;
 263         /* Mode register set cycle time (tMRD). */
 264         unsigned char tmrd_mclk;
 265
 266 #ifdef CONFIG_FSL_DDR3
 267         /*
 268          * (tXARD and tXARDS). Empirical?
 269          * The DDR3 spec has not tXARD,
 270          * we use the tXP instead of it.
 271          * tXP=max(3nCK, 7.5ns) for DDR3.
 272          * spec has not the tAXPD, we use
 273          * tAXPD=1, need design to confirm.
 274          */
 275         int tXP = max((get_memory_clk_period_ps() * 3), 7500); /* unit=ps */
 276         unsigned int data_rate = get_ddr_freq(0);
 277         tmrd_mclk = 4;
 278         /* set the turnaround time */
 279
 280         /*
 281          * for single quad-rank DIMM and two dual-rank DIMMs
 282          * to avoid ODT overlap
 283          */
 284         if (avoid_odt_overlap(dimm_params)) {
 285                 twwt_mclk = 2;
 286                 trrt_mclk = 1;
 287         }
 288         /* for faster clock, need more time for data setup */
 289         trwt_mclk = (data_rate/1000000 > 1800) ? 2 : 1;
 290
 291         if ((data_rate/1000000 > 1150) || (popts->memctl_interleaving))
 292                 twrt_mclk = 1;
 293
 294         if (popts->dynamic_power == 0) {        /* powerdown is not used */
 295                 act_pd_exit_mclk = 1;
 296                 pre_pd_exit_mclk = 1;
 297                 taxpd_mclk = 1;
 298         } else {
 299                 /* act_pd_exit_mclk = tXARD, see above */
 300                 act_pd_exit_mclk = picos_to_mclk(tXP);
 301                 /* Mode register MR0[A12] is '1' - fast exit */
 302                 pre_pd_exit_mclk = act_pd_exit_mclk;
 303                 taxpd_mclk = 1;
 304         }
 305 #else /* CONFIG_FSL_DDR2 */
 306         /*
 307          * (tXARD and tXARDS). Empirical?
 308          * tXARD = 2 for DDR2
 309          * tXP=2
 310          * tAXPD=8
 311          */
 312         act_pd_exit_mclk = 2;
 313         pre_pd_exit_mclk = 2;
 314         taxpd_mclk = 8;
 315         tmrd_mclk = 2;
 316 #endif
 317
 318         if (popts->trwt_override)
 319                 trwt_mclk = popts->trwt;
 320
 321         ddr->timing_cfg_0 = (0
 322                 | ((trwt_mclk & 0x3) << 30)     /* RWT */
 323                 | ((twrt_mclk & 0x3) << 28)     /* WRT */
 324                 | ((trrt_mclk & 0x3) << 26)     /* RRT */
 325                 | ((twwt_mclk & 0x3) << 24)     /* WWT */
 326                 | ((act_pd_exit_mclk & 0x7) << 20)  /* ACT_PD_EXIT */
 327                 | ((pre_pd_exit_mclk & 0xF) << 16)  /* PRE_PD_EXIT */
 328                 | ((taxpd_mclk & 0xf) << 8)     /* ODT_PD_EXIT */
 329                 | ((tmrd_mclk & 0xf) << 0)      /* MRS_CYC */
 330                 );
 331         debug("FSLDDR: timing_cfg_0 = 0x%08x\n", ddr->timing_cfg_0);
 332 }
 333 #endif  /* defined(CONFIG_FSL_DDR2) */
 334
 335 /* DDR SDRAM Timing Configuration 3 (TIMING_CFG_3) */
 336 static void set_timing_cfg_3(fsl_ddr_cfg_regs_t *ddr,
 337                                const memctl_options_t *popts,
 338                                const common_timing_params_t *common_dimm,
 339                                unsigned int cas_latency)
 340 {
 341         /* Extended precharge to activate interval (tRP) */
 342         unsigned int ext_pretoact = 0;
 343         /* Extended Activate to precharge interval (tRAS) */
 344         unsigned int ext_acttopre = 0;
 345         /* Extended activate to read/write interval (tRCD) */
 346         unsigned int ext_acttorw = 0;
 347         /* Extended refresh recovery time (tRFC) */
 348         unsigned int ext_refrec;
 349         /* Extended MCAS latency from READ cmd */
 350         unsigned int ext_caslat = 0;
 351         /* Extended last data to precharge interval (tWR) */
 352         unsigned int ext_wrrec = 0;
 353         /* Control Adjust */
 354         unsigned int cntl_adj = 0;
 355
 356         ext_pretoact = picos_to_mclk(common_dimm->tRP_ps) >> 4;
 357         ext_acttopre = picos_to_mclk(common_dimm->tRAS_ps) >> 4;
 358         ext_acttorw = picos_to_mclk(common_dimm->tRCD_ps) >> 4;
 359         ext_caslat = (2 * cas_latency - 1) >> 4;
 360         ext_refrec = (picos_to_mclk(common_dimm->tRFC_ps) - 8) >> 4;
 361         /* ext_wrrec only deals with 16 clock and above, or 14 with OTF */
 362         ext_wrrec = (picos_to_mclk(common_dimm->tWR_ps) +
 363                 (popts->OTF_burst_chop_en ? 2 : 0)) >> 4;
 364
 365         ddr->timing_cfg_3 = (0
 366                 | ((ext_pretoact & 0x1) << 28)
 367                 | ((ext_acttopre & 0x2) << 24)
 368                 | ((ext_acttorw & 0x1) << 22)
 369                 | ((ext_refrec & 0x1F) << 16)
 370                 | ((ext_caslat & 0x3) << 12)
 371                 | ((ext_wrrec & 0x1) << 8)
 372                 | ((cntl_adj & 0x7) << 0)
 373                 );
 374         debug("FSLDDR: timing_cfg_3 = 0x%08x\n", ddr->timing_cfg_3);
 375 }
 376
 377 /* DDR SDRAM Timing Configuration 1 (TIMING_CFG_1) */
 378 static void set_timing_cfg_1(fsl_ddr_cfg_regs_t *ddr,
 379                                const memctl_options_t *popts,
 380                                const common_timing_params_t *common_dimm,
 381                                unsigned int cas_latency)
 382 {
 383         /* Precharge-to-activate interval (tRP) */
 384         unsigned char pretoact_mclk;
 385         /* Activate to precharge interval (tRAS) */
 386         unsigned char acttopre_mclk;
 387         /*  Activate to read/write interval (tRCD) */
 388         unsigned char acttorw_mclk;
 389         /* CASLAT */
 390         unsigned char caslat_ctrl;
 391         /*  Refresh recovery time (tRFC) ; trfc_low */
 392         unsigned char refrec_ctrl;
 393         /* Last data to precharge minimum interval (tWR) */
 394         unsigned char wrrec_mclk;
 395         /* Activate-to-activate interval (tRRD) */
 396         unsigned char acttoact_mclk;
 397         /* Last write data pair to read command issue interval (tWTR) */
 398         unsigned char wrtord_mclk;
 399         /* DDR_SDRAM_MODE doesn't support 9,11,13,15 */
 400         static const u8 wrrec_table[] = {
 401                 1, 2, 3, 4, 5, 6, 7, 8, 10, 10, 12, 12, 14, 14, 0, 0};
 402
 403         pretoact_mclk = picos_to_mclk(common_dimm->tRP_ps);
 404         acttopre_mclk = picos_to_mclk(common_dimm->tRAS_ps);
 405         acttorw_mclk = picos_to_mclk(common_dimm->tRCD_ps);
 406
 407         /*
 408          * Translate CAS Latency to a DDR controller field value:
 409          *
 410          *      CAS Lat DDR I   DDR II  Ctrl
 411          *      Clocks  SPD Bit SPD Bit Value
 412          *      ------- ------- ------- -----
 413          *      1.0     0               0001
 414          *      1.5     1               0010
 415          *      2.0     2       2       0011
 416          *      2.5     3               0100
 417          *      3.0     4       3       0101
 418          *      3.5     5               0110
 419          *      4.0             4       0111
 420          *      4.5                     1000
 421          *      5.0             5       1001
 422          */
 423 #if defined(CONFIG_FSL_DDR1)
 424         caslat_ctrl = (cas_latency + 1) & 0x07;
 425 #elif defined(CONFIG_FSL_DDR2)
 426         caslat_ctrl = 2 * cas_latency - 1;
 427 #else
 428         /*
 429          * if the CAS latency more than 8 cycle,
 430          * we need set extend bit for it at
 431          * TIMING_CFG_3[EXT_CASLAT]
 432          */
 433         caslat_ctrl = 2 * cas_latency - 1;
 434 #endif
 435
 436         refrec_ctrl = picos_to_mclk(common_dimm->tRFC_ps) - 8;
 437         wrrec_mclk = picos_to_mclk(common_dimm->tWR_ps);
 438
 439         if (wrrec_mclk > 16)
 440                 printf("Error: WRREC doesn't support more than 16 clocks\n");
 441         else
 442                 wrrec_mclk = wrrec_table[wrrec_mclk - 1];
 443         if (popts->OTF_burst_chop_en)
 444                 wrrec_mclk += 2;
 445
 446         acttoact_mclk = picos_to_mclk(common_dimm->tRRD_ps);
 447         /*
 448          * JEDEC has min requirement for tRRD
 449          */
 450 #if defined(CONFIG_FSL_DDR3)
 451         if (acttoact_mclk < 4)
 452                 acttoact_mclk = 4;
 453 #endif
 454         wrtord_mclk = picos_to_mclk(common_dimm->tWTR_ps);
 455         /*
 456          * JEDEC has some min requirements for tWTR
 457          */
 458 #if defined(CONFIG_FSL_DDR2)
 459         if (wrtord_mclk < 2)
 460                 wrtord_mclk = 2;
 461 #elif defined(CONFIG_FSL_DDR3)
 462         if (wrtord_mclk < 4)
 463                 wrtord_mclk = 4;
 464 #endif
 465         if (popts->OTF_burst_chop_en)
 466                 wrtord_mclk += 2;
 467
 468         ddr->timing_cfg_1 = (0
 469                 | ((pretoact_mclk & 0x0F) << 28)
 470                 | ((acttopre_mclk & 0x0F) << 24)
 471                 | ((acttorw_mclk & 0xF) << 20)
 472                 | ((caslat_ctrl & 0xF) << 16)
 473                 | ((refrec_ctrl & 0xF) << 12)
 474                 | ((wrrec_mclk & 0x0F) << 8)
 475                 | ((acttoact_mclk & 0x0F) << 4)
 476                 | ((wrtord_mclk & 0x0F) << 0)
 477                 );
 478         debug("FSLDDR: timing_cfg_1 = 0x%08x\n", ddr->timing_cfg_1);
 479 }
 480
 481 /* DDR SDRAM Timing Configuration 2 (TIMING_CFG_2) */
 482 static void set_timing_cfg_2(fsl_ddr_cfg_regs_t *ddr,
 483                                const memctl_options_t *popts,
 484                                const common_timing_params_t *common_dimm,
 485                                unsigned int cas_latency,
 486                                unsigned int additive_latency)
 487 {
 488         /* Additive latency */
 489         unsigned char add_lat_mclk;
 490         /* CAS-to-preamble override */
 491         unsigned short cpo;
 492         /* Write latency */
 493         unsigned char wr_lat;
 494         /*  Read to precharge (tRTP) */
 495         unsigned char rd_to_pre;
 496         /* Write command to write data strobe timing adjustment */
 497         unsigned char wr_data_delay;
 498         /* Minimum CKE pulse width (tCKE) */
 499         unsigned char cke_pls;
 500         /* Window for four activates (tFAW) */
 501         unsigned short four_act;
 502
 503         /* FIXME add check that this must be less than acttorw_mclk */
 504         add_lat_mclk = additive_latency;
 505         cpo = popts->cpo_override;
 506
 507 #if defined(CONFIG_FSL_DDR1)
 508         /*
 509          * This is a lie.  It should really be 1, but if it is
 510          * set to 1, bits overlap into the old controller's
 511          * otherwise unused ACSM field.  If we leave it 0, then
 512          * the HW will magically treat it as 1 for DDR 1.  Oh Yea.
 513          */
 514         wr_lat = 0;
 515 #elif defined(CONFIG_FSL_DDR2)
 516         wr_lat = cas_latency - 1;
 517 #else
 518         wr_lat = compute_cas_write_latency();
 519 #endif
 520
 521         rd_to_pre = picos_to_mclk(common_dimm->tRTP_ps);
 522         /*
 523          * JEDEC has some min requirements for tRTP
 524          */
 525 #if defined(CONFIG_FSL_DDR2)
 526         if (rd_to_pre  < 2)
 527                 rd_to_pre  = 2;
 528 #elif defined(CONFIG_FSL_DDR3)
 529         if (rd_to_pre < 4)
 530                 rd_to_pre = 4;
 531 #endif
 532         if (additive_latency)
 533                 rd_to_pre += additive_latency;
 534         if (popts->OTF_burst_chop_en)
 535                 rd_to_pre += 2; /* according to UM */
 536
 537         wr_data_delay = popts->write_data_delay;
 538         cke_pls = picos_to_mclk(popts->tCKE_clock_pulse_width_ps);
 539         four_act = picos_to_mclk(popts->tFAW_window_four_activates_ps);
 540
 541         ddr->timing_cfg_2 = (0
 542                 | ((add_lat_mclk & 0xf) << 28)
 543                 | ((cpo & 0x1f) << 23)
 544                 | ((wr_lat & 0xf) << 19)
 545                 | ((rd_to_pre & RD_TO_PRE_MASK) << RD_TO_PRE_SHIFT)
 546                 | ((wr_data_delay & WR_DATA_DELAY_MASK) << WR_DATA_DELAY_SHIFT)
 547                 | ((cke_pls & 0x7) << 6)
 548                 | ((four_act & 0x3f) << 0)
 549                 );
 550         debug("FSLDDR: timing_cfg_2 = 0x%08x\n", ddr->timing_cfg_2);
 551 }
 552
 553 /* DDR SDRAM Register Control Word */
 554 static void set_ddr_sdram_rcw(fsl_ddr_cfg_regs_t *ddr,
 555                                const memctl_options_t *popts,
 556                                const common_timing_params_t *common_dimm)
 557 {
 558         if (common_dimm->all_DIMMs_registered
 559                 && !common_dimm->all_DIMMs_unbuffered) {
 560                 if (popts->rcw_override) {
 561                         ddr->ddr_sdram_rcw_1 = popts->rcw_1;
 562                         ddr->ddr_sdram_rcw_2 = popts->rcw_2;
 563                 } else {
 564                         ddr->ddr_sdram_rcw_1 =
 565                                 common_dimm->rcw[0] << 28 | \
 566                                 common_dimm->rcw[1] << 24 | \
 567                                 common_dimm->rcw[2] << 20 | \
 568                                 common_dimm->rcw[3] << 16 | \
 569                                 common_dimm->rcw[4] << 12 | \
 570                                 common_dimm->rcw[5] << 8 | \
 571                                 common_dimm->rcw[6] << 4 | \
 572                                 common_dimm->rcw[7];
 573                         ddr->ddr_sdram_rcw_2 =
 574                                 common_dimm->rcw[8] << 28 | \
 575                                 common_dimm->rcw[9] << 24 | \
 576                                 common_dimm->rcw[10] << 20 | \
 577                                 common_dimm->rcw[11] << 16 | \
 578                                 common_dimm->rcw[12] << 12 | \
 579                                 common_dimm->rcw[13] << 8 | \
 580                                 common_dimm->rcw[14] << 4 | \
 581                                 common_dimm->rcw[15];
 582                 }
 583                 debug("FSLDDR: ddr_sdram_rcw_1 = 0x%08x\n", ddr->ddr_sdram_rcw_1);
 584                 debug("FSLDDR: ddr_sdram_rcw_2 = 0x%08x\n", ddr->ddr_sdram_rcw_2);
 585         }
 586 }
 587
 588 /* DDR SDRAM control configuration (DDR_SDRAM_CFG) */
 589 static void set_ddr_sdram_cfg(fsl_ddr_cfg_regs_t *ddr,
 590                                const memctl_options_t *popts,
 591                                const common_timing_params_t *common_dimm)
 592 {
 593         unsigned int mem_en;            /* DDR SDRAM interface logic enable */
 594         unsigned int sren;              /* Self refresh enable (during sleep) */
 595         unsigned int ecc_en;            /* ECC enable. */
 596         unsigned int rd_en;             /* Registered DIMM enable */
 597         unsigned int sdram_type;        /* Type of SDRAM */
 598         unsigned int dyn_pwr;           /* Dynamic power management mode */
 599         unsigned int dbw;               /* DRAM dta bus width */
 600         unsigned int eight_be = 0;      /* 8-beat burst enable, DDR2 is zero */
 601         unsigned int ncap = 0;          /* Non-concurrent auto-precharge */
 602         unsigned int threeT_en;         /* Enable 3T timing */
 603         unsigned int twoT_en;           /* Enable 2T timing */
 604         unsigned int ba_intlv_ctl;      /* Bank (CS) interleaving control */
 605         unsigned int x32_en = 0;        /* x32 enable */
 606         unsigned int pchb8 = 0;         /* precharge bit 8 enable */
 607         unsigned int hse;               /* Global half strength override */
 608         unsigned int mem_halt = 0;      /* memory controller halt */
 609         unsigned int bi = 0;            /* Bypass initialization */
 610
 611         mem_en = 1;
 612         sren = popts->self_refresh_in_sleep;
 613         if (common_dimm->all_DIMMs_ECC_capable) {
 614                 /* Allow setting of ECC only if all DIMMs are ECC. */
 615                 ecc_en = popts->ECC_mode;
 616         } else {
 617                 ecc_en = 0;
 618         }
 619
 620         if (common_dimm->all_DIMMs_registered
 621                 && !common_dimm->all_DIMMs_unbuffered) {
 622                 rd_en = 1;
 623                 twoT_en = 0;
 624         } else {
 625                 rd_en = 0;
 626                 twoT_en = popts->twoT_en;
 627         }
 628
 629         sdram_type = CONFIG_FSL_SDRAM_TYPE;
 630
 631         dyn_pwr = popts->dynamic_power;
 632         dbw = popts->data_bus_width;
 633         /* 8-beat burst enable DDR-III case
 634          * we must clear it when use the on-the-fly mode,
 635          * must set it when use the 32-bits bus mode.
 636          */
 637         if (sdram_type == SDRAM_TYPE_DDR3) {
 638                 if (popts->burst_length == DDR_BL8)
 639                         eight_be = 1;
 640                 if (popts->burst_length == DDR_OTF)
 641                         eight_be = 0;
 642                 if (dbw == 0x1)
 643                         eight_be = 1;
 644         }
 645
 646         threeT_en = popts->threeT_en;
 647         ba_intlv_ctl = popts->ba_intlv_ctl;
 648         hse = popts->half_strength_driver_enable;
 649
 650         ddr->ddr_sdram_cfg = (0
 651                         | ((mem_en & 0x1) << 31)
 652                         | ((sren & 0x1) << 30)
 653                         | ((ecc_en & 0x1) << 29)
 654                         | ((rd_en & 0x1) << 28)
 655                         | ((sdram_type & 0x7) << 24)
 656                         | ((dyn_pwr & 0x1) << 21)
 657                         | ((dbw & 0x3) << 19)
 658                         | ((eight_be & 0x1) << 18)
 659                         | ((ncap & 0x1) << 17)
 660                         | ((threeT_en & 0x1) << 16)
 661                         | ((twoT_en & 0x1) << 15)
 662                         | ((ba_intlv_ctl & 0x7F) << 8)
 663                         | ((x32_en & 0x1) << 5)
 664                         | ((pchb8 & 0x1) << 4)
 665                         | ((hse & 0x1) << 3)
 666                         | ((mem_halt & 0x1) << 1)
 667                         | ((bi & 0x1) << 0)
 668                         );
 669         debug("FSLDDR: ddr_sdram_cfg = 0x%08x\n", ddr->ddr_sdram_cfg);
 670 }
 671
 672 /* DDR SDRAM control configuration 2 (DDR_SDRAM_CFG_2) */
 673 static void set_ddr_sdram_cfg_2(fsl_ddr_cfg_regs_t *ddr,
 674                                const memctl_options_t *popts,
 675                                const unsigned int unq_mrs_en)
 676 {
 677         unsigned int frc_sr = 0;        /* Force self refresh */
 678         unsigned int sr_ie = 0;         /* Self-refresh interrupt enable */
 679         unsigned int dll_rst_dis;       /* DLL reset disable */
 680         unsigned int dqs_cfg;           /* DQS configuration */
 681         unsigned int odt_cfg = 0;       /* ODT configuration */
 682         unsigned int num_pr;            /* Number of posted refreshes */
 683         unsigned int slow = 0;          /* DDR will be run less than 1250 */
 684         unsigned int x4_en = 0;         /* x4 DRAM enable */
 685         unsigned int obc_cfg;           /* On-The-Fly Burst Chop Cfg */
 686         unsigned int ap_en;             /* Address Parity Enable */
 687         unsigned int d_init;            /* DRAM data initialization */
 688         unsigned int rcw_en = 0;        /* Register Control Word Enable */
 689         unsigned int md_en = 0;         /* Mirrored DIMM Enable */
 690         unsigned int qd_en = 0;         /* quad-rank DIMM Enable */
 691         int i;
 692
 693         dll_rst_dis = 1;        /* Make this configurable */
 694         dqs_cfg = popts->DQS_config;
 695         for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
 696                 if (popts->cs_local_opts[i].odt_rd_cfg
 697                         || popts->cs_local_opts[i].odt_wr_cfg) {
 698                         odt_cfg = SDRAM_CFG2_ODT_ONLY_READ;
 699                         break;
 700                 }
 701         }
 702
 703         num_pr = 1;     /* Make this configurable */
 704
 705         /*
 706          * 8572 manual says
 707          *     {TIMING_CFG_1[PRETOACT]
 708          *      + [DDR_SDRAM_CFG_2[NUM_PR]
 709          *        * ({EXT_REFREC || REFREC} + 8 + 2)]}
 710          *      << DDR_SDRAM_INTERVAL[REFINT]
 711          */
 712 #if defined(CONFIG_FSL_DDR3)
 713         obc_cfg = popts->OTF_burst_chop_en;
 714 #else
 715         obc_cfg = 0;
 716 #endif
 717
 718 #if (CONFIG_SYS_FSL_DDR_VER >= FSL_DDR_VER_4_7)
 719         slow = get_ddr_freq(0) < 1249000000;
 720 #endif
 721
 722         if (popts->registered_dimm_en) {
 723                 rcw_en = 1;
 724                 ap_en = popts->ap_en;
 725         } else {
 726                 ap_en = 0;
 727         }
 728
 729         x4_en = popts->x4_en ? 1 : 0;
 730
 731 #if defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
 732         /* Use the DDR controller to auto initialize memory. */
 733         d_init = popts->ECC_init_using_memctl;
 734         ddr->ddr_data_init = CONFIG_MEM_INIT_VALUE;
 735         debug("DDR: ddr_data_init = 0x%08x\n", ddr->ddr_data_init);
 736 #else
 737         /* Memory will be initialized via DMA, or not at all. */
 738         d_init = 0;
 739 #endif
 740
 741 #if defined(CONFIG_FSL_DDR3)
 742         md_en = popts->mirrored_dimm;
 743 #endif
 744         qd_en = popts->quad_rank_present ? 1 : 0;
 745         ddr->ddr_sdram_cfg_2 = (0
 746                 | ((frc_sr & 0x1) << 31)
 747                 | ((sr_ie & 0x1) << 30)
 748                 | ((dll_rst_dis & 0x1) << 29)
 749                 | ((dqs_cfg & 0x3) << 26)
 750                 | ((odt_cfg & 0x3) << 21)
 751                 | ((num_pr & 0xf) << 12)
 752                 | ((slow & 1) << 11)
 753                 | (x4_en << 10)
 754                 | (qd_en << 9)
 755                 | (unq_mrs_en << 8)
 756                 | ((obc_cfg & 0x1) << 6)
 757                 | ((ap_en & 0x1) << 5)
 758                 | ((d_init & 0x1) << 4)
 759                 | ((rcw_en & 0x1) << 2)
 760                 | ((md_en & 0x1) << 0)
 761                 );
 762         debug("FSLDDR: ddr_sdram_cfg_2 = 0x%08x\n", ddr->ddr_sdram_cfg_2);
 763 }
 764
 765 /* DDR SDRAM Mode configuration 2 (DDR_SDRAM_MODE_2) */
 766 static void set_ddr_sdram_mode_2(fsl_ddr_cfg_regs_t *ddr,
 767                                 const memctl_options_t *popts,
 768                                 const unsigned int unq_mrs_en)
 769 {
 770         unsigned short esdmode2 = 0;    /* Extended SDRAM mode 2 */
 771         unsigned short esdmode3 = 0;    /* Extended SDRAM mode 3 */
 772
 773 #if defined(CONFIG_FSL_DDR3)
 774         int i;
 775         unsigned int rtt_wr = 0;        /* Rtt_WR - dynamic ODT off */
 776         unsigned int srt = 0;   /* self-refresh temerature, normal range */
 777         unsigned int asr = 0;   /* auto self-refresh disable */
 778         unsigned int cwl = compute_cas_write_latency() - 5;
 779         unsigned int pasr = 0;  /* partial array self refresh disable */
 780
 781         if (popts->rtt_override)
 782                 rtt_wr = popts->rtt_wr_override_value;
 783         else
 784                 rtt_wr = popts->cs_local_opts[0].odt_rtt_wr;
 785         esdmode2 = (0
 786                 | ((rtt_wr & 0x3) << 9)
 787                 | ((srt & 0x1) << 7)
 788                 | ((asr & 0x1) << 6)
 789                 | ((cwl & 0x7) << 3)
 790                 | ((pasr & 0x7) << 0));
 791 #endif
 792         ddr->ddr_sdram_mode_2 = (0
 793                                  | ((esdmode2 & 0xFFFF) << 16)
 794                                  | ((esdmode3 & 0xFFFF) << 0)
 795                                  );
 796         debug("FSLDDR: ddr_sdram_mode_2 = 0x%08x\n", ddr->ddr_sdram_mode_2);
 797
 798 #ifdef CONFIG_FSL_DDR3
 799         if (unq_mrs_en) {       /* unique mode registers are supported */
 800                 for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
 801                         if (popts->rtt_override)
 802                                 rtt_wr = popts->rtt_wr_override_value;
 803                         else
 804                                 rtt_wr = popts->cs_local_opts[i].odt_rtt_wr;
 805
 806                         esdmode2 &= 0xF9FF;     /* clear bit 10, 9 */
 807                         esdmode2 |= (rtt_wr & 0x3) << 9;
 808                         switch (i) {
 809                         case 1:
 810                                 ddr->ddr_sdram_mode_4 = (0
 811                                         | ((esdmode2 & 0xFFFF) << 16)
 812                                         | ((esdmode3 & 0xFFFF) << 0)
 813                                         );
 814                                 break;
 815                         case 2:
 816                                 ddr->ddr_sdram_mode_6 = (0
 817                                         | ((esdmode2 & 0xFFFF) << 16)
 818                                         | ((esdmode3 & 0xFFFF) << 0)
 819                                         );
 820                                 break;
 821                         case 3:
 822                                 ddr->ddr_sdram_mode_8 = (0
 823                                         | ((esdmode2 & 0xFFFF) << 16)
 824                                         | ((esdmode3 & 0xFFFF) << 0)
 825                                         );
 826                                 break;
 827                         }
 828                 }
 829                 debug("FSLDDR: ddr_sdram_mode_4 = 0x%08x\n",
 830                         ddr->ddr_sdram_mode_4);
 831                 debug("FSLDDR: ddr_sdram_mode_6 = 0x%08x\n",
 832                         ddr->ddr_sdram_mode_6);
 833                 debug("FSLDDR: ddr_sdram_mode_8 = 0x%08x\n",
 834                         ddr->ddr_sdram_mode_8);
 835         }
 836 #endif
 837 }
 838
 839 /* DDR SDRAM Interval Configuration (DDR_SDRAM_INTERVAL) */
 840 static void set_ddr_sdram_interval(fsl_ddr_cfg_regs_t *ddr,
 841                                const memctl_options_t *popts,
 842                                const common_timing_params_t *common_dimm)
 843 {
 844         unsigned int refint;    /* Refresh interval */
 845         unsigned int bstopre;   /* Precharge interval */
 846
 847         refint = picos_to_mclk(common_dimm->refresh_rate_ps);
 848
 849         bstopre = popts->bstopre;
 850
 851         /* refint field used 0x3FFF in earlier controllers */
 852         ddr->ddr_sdram_interval = (0
 853                                    | ((refint & 0xFFFF) << 16)
 854                                    | ((bstopre & 0x3FFF) << 0)
 855                                    );
 856         debug("FSLDDR: ddr_sdram_interval = 0x%08x\n", ddr->ddr_sdram_interval);
 857 }
 858
 859 #if defined(CONFIG_FSL_DDR3)
 860 /* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */
 861 static void set_ddr_sdram_mode(fsl_ddr_cfg_regs_t *ddr,
 862                                const memctl_options_t *popts,
 863                                const common_timing_params_t *common_dimm,
 864                                unsigned int cas_latency,
 865                                unsigned int additive_latency,
 866                                const unsigned int unq_mrs_en)
 867 {
 868         unsigned short esdmode;         /* Extended SDRAM mode */
 869         unsigned short sdmode;          /* SDRAM mode */
 870
 871         /* Mode Register - MR1 */
 872         unsigned int qoff = 0;          /* Output buffer enable 0=yes, 1=no */
 873         unsigned int tdqs_en = 0;       /* TDQS Enable: 0=no, 1=yes */
 874         unsigned int rtt;
 875         unsigned int wrlvl_en = 0;      /* Write level enable: 0=no, 1=yes */
 876         unsigned int al = 0;            /* Posted CAS# additive latency (AL) */
 877         unsigned int dic = 0;           /* Output driver impedance, 40ohm */
 878         unsigned int dll_en = 0;        /* DLL Enable  0=Enable (Normal),
 879                                                        1=Disable (Test/Debug) */
 880
 881         /* Mode Register - MR0 */
 882         unsigned int dll_on;    /* DLL control for precharge PD, 0=off, 1=on */
 883         unsigned int wr = 0;    /* Write Recovery */
 884         unsigned int dll_rst;   /* DLL Reset */
 885         unsigned int mode;      /* Normal=0 or Test=1 */
 886         unsigned int caslat = 4;/* CAS# latency, default set as 6 cycles */
 887         /* BT: Burst Type (0=Nibble Sequential, 1=Interleaved) */
 888         unsigned int bt;
 889         unsigned int bl;        /* BL: Burst Length */
 890
 891         unsigned int wr_mclk;
 892         /*
 893          * DDR_SDRAM_MODE doesn't support 9,11,13,15
 894          * Please refer JEDEC Standard No. 79-3E for Mode Register MR0
 895          * for this table
 896          */
 897         static const u8 wr_table[] = {1, 2, 3, 4, 5, 5, 6, 6, 7, 7, 0, 0};
 898
 899         const unsigned int mclk_ps = get_memory_clk_period_ps();
 900         int i;
 901
 902         if (popts->rtt_override)
 903                 rtt = popts->rtt_override_value;
 904         else
 905                 rtt = popts->cs_local_opts[0].odt_rtt_norm;
 906
 907         if (additive_latency == (cas_latency - 1))
 908                 al = 1;
 909         if (additive_latency == (cas_latency - 2))
 910                 al = 2;
 911
 912         if (popts->quad_rank_present)
 913                 dic = 1;        /* output driver impedance 240/7 ohm */
 914
 915         /*
 916          * The esdmode value will also be used for writing
 917          * MR1 during write leveling for DDR3, although the
 918          * bits specifically related to the write leveling
 919          * scheme will be handled automatically by the DDR
 920          * controller. so we set the wrlvl_en = 0 here.
 921          */
 922         esdmode = (0
 923                 | ((qoff & 0x1) << 12)
 924                 | ((tdqs_en & 0x1) << 11)
 925                 | ((rtt & 0x4) << 7)   /* rtt field is split */
 926                 | ((wrlvl_en & 0x1) << 7)
 927                 | ((rtt & 0x2) << 5)   /* rtt field is split */
 928                 | ((dic & 0x2) << 4)   /* DIC field is split */
 929                 | ((al & 0x3) << 3)
 930                 | ((rtt & 0x1) << 2)  /* rtt field is split */
 931                 | ((dic & 0x1) << 1)   /* DIC field is split */
 932                 | ((dll_en & 0x1) << 0)
 933                 );
 934
 935         /*
 936          * DLL control for precharge PD
 937          * 0=slow exit DLL off (tXPDLL)
 938          * 1=fast exit DLL on (tXP)
 939          */
 940         dll_on = 1;
 941
 942         wr_mclk = (common_dimm->tWR_ps + mclk_ps - 1) / mclk_ps;
 943         if (wr_mclk <= 16) {
 944                 wr = wr_table[wr_mclk - 5];
 945         } else {
 946                 printf("Error: unsupported write recovery for mode register "
 947                        "wr_mclk = %d\n", wr_mclk);
 948         }
 949
 950         dll_rst = 0;    /* dll no reset */
 951         mode = 0;       /* normal mode */
 952
 953         /* look up table to get the cas latency bits */
 954         if (cas_latency >= 5 && cas_latency <= 16) {
 955                 unsigned char cas_latency_table[] = {
 956                         0x2,    /* 5 clocks */
 957                         0x4,    /* 6 clocks */
 958                         0x6,    /* 7 clocks */
 959                         0x8,    /* 8 clocks */
 960                         0xa,    /* 9 clocks */
 961                         0xc,    /* 10 clocks */
 962                         0xe,    /* 11 clocks */
 963                         0x1,    /* 12 clocks */
 964                         0x3,    /* 13 clocks */
 965                         0x5,    /* 14 clocks */
 966                         0x7,    /* 15 clocks */
 967                         0x9,    /* 16 clocks */
 968                 };
 969                 caslat = cas_latency_table[cas_latency - 5];
 970         } else {
 971                 printf("Error: unsupported cas latency for mode register\n");
 972         }
 973
 974         bt = 0; /* Nibble sequential */
 975
 976         switch (popts->burst_length) {
 977         case DDR_BL8:
 978                 bl = 0;
 979                 break;
 980         case DDR_OTF:
 981                 bl = 1;
 982                 break;
 983         case DDR_BC4:
 984                 bl = 2;
 985                 break;
 986         default:
 987                 printf("Error: invalid burst length of %u specified. "
 988                         " Defaulting to on-the-fly BC4 or BL8 beats.\n",
 989                         popts->burst_length);
 990                 bl = 1;
 991                 break;
 992         }
 993
 994         sdmode = (0
 995                   | ((dll_on & 0x1) << 12)
 996                   | ((wr & 0x7) << 9)
 997                   | ((dll_rst & 0x1) << 8)
 998                   | ((mode & 0x1) << 7)
 999                   | (((caslat >> 1) & 0x7) << 4)
1000                   | ((bt & 0x1) << 3)
1001                   | ((caslat & 1) << 2)
1002                   | ((bl & 0x3) << 0)
1003                   );
1004
1005         ddr->ddr_sdram_mode = (0
1006                                | ((esdmode & 0xFFFF) << 16)
1007                                | ((sdmode & 0xFFFF) << 0)
1008                                );
1009
1010         debug("FSLDDR: ddr_sdram_mode = 0x%08x\n", ddr->ddr_sdram_mode);
1011
1012         if (unq_mrs_en) {       /* unique mode registers are supported */
1013                 for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
1014                         if (popts->rtt_override)
1015                                 rtt = popts->rtt_override_value;
1016                         else
1017                                 rtt = popts->cs_local_opts[i].odt_rtt_norm;
1018
1019                         esdmode &= 0xFDBB;      /* clear bit 9,6,2 */
1020                         esdmode |= (0
1021                                 | ((rtt & 0x4) << 7)   /* rtt field is split */
1022                                 | ((rtt & 0x2) << 5)   /* rtt field is split */
1023                                 | ((rtt & 0x1) << 2)  /* rtt field is split */
1024                                 );
1025                         switch (i) {
1026                         case 1:
1027                                 ddr->ddr_sdram_mode_3 = (0
1028                                        | ((esdmode & 0xFFFF) << 16)
1029                                        | ((sdmode & 0xFFFF) << 0)
1030                                        );
1031                                 break;
1032                         case 2:
1033                                 ddr->ddr_sdram_mode_5 = (0
1034                                        | ((esdmode & 0xFFFF) << 16)
1035                                        | ((sdmode & 0xFFFF) << 0)
1036                                        );
1037                                 break;
1038                         case 3:
1039                                 ddr->ddr_sdram_mode_7 = (0
1040                                        | ((esdmode & 0xFFFF) << 16)
1041                                        | ((sdmode & 0xFFFF) << 0)
1042                                        );
1043                                 break;
1044                         }
1045                 }
1046                 debug("FSLDDR: ddr_sdram_mode_3 = 0x%08x\n",
1047                         ddr->ddr_sdram_mode_3);
1048                 debug("FSLDDR: ddr_sdram_mode_5 = 0x%08x\n",
1049                         ddr->ddr_sdram_mode_5);
1050                 debug("FSLDDR: ddr_sdram_mode_5 = 0x%08x\n",
1051                         ddr->ddr_sdram_mode_5);
1052         }
1053 }
1054
1055 #else /* !CONFIG_FSL_DDR3 */
1056
1057 /* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */
1058 static void set_ddr_sdram_mode(fsl_ddr_cfg_regs_t *ddr,
1059                                const memctl_options_t *popts,
1060                                const common_timing_params_t *common_dimm,
1061                                unsigned int cas_latency,
1062                                unsigned int additive_latency,
1063                                const unsigned int unq_mrs_en)
1064 {
1065         unsigned short esdmode;         /* Extended SDRAM mode */
1066         unsigned short sdmode;          /* SDRAM mode */
1067
1068         /*
1069          * FIXME: This ought to be pre-calculated in a
1070          * technology-specific routine,
1071          * e.g. compute_DDR2_mode_register(), and then the
1072          * sdmode and esdmode passed in as part of common_dimm.
1073          */
1074
1075         /* Extended Mode Register */
1076         unsigned int mrs = 0;           /* Mode Register Set */
1077         unsigned int outputs = 0;       /* 0=Enabled, 1=Disabled */
1078         unsigned int rdqs_en = 0;       /* RDQS Enable: 0=no, 1=yes */
1079         unsigned int dqs_en = 0;        /* DQS# Enable: 0=enable, 1=disable */
1080         unsigned int ocd = 0;           /* 0x0=OCD not supported,
1081                                            0x7=OCD default state */
1082         unsigned int rtt;
1083         unsigned int al;                /* Posted CAS# additive latency (AL) */
1084         unsigned int ods = 0;           /* Output Drive Strength:
1085                                                 0 = Full strength (18ohm)
1086                                                 1 = Reduced strength (4ohm) */
1087         unsigned int dll_en = 0;        /* DLL Enable  0=Enable (Normal),
1088                                                        1=Disable (Test/Debug) */
1089
1090         /* Mode Register (MR) */
1091         unsigned int mr;        /* Mode Register Definition */
1092         unsigned int pd;        /* Power-Down Mode */
1093         unsigned int wr;        /* Write Recovery */
1094         unsigned int dll_res;   /* DLL Reset */
1095         unsigned int mode;      /* Normal=0 or Test=1 */
1096         unsigned int caslat = 0;/* CAS# latency */
1097         /* BT: Burst Type (0=Sequential, 1=Interleaved) */
1098         unsigned int bt;
1099         unsigned int bl;        /* BL: Burst Length */
1100
1101 #if defined(CONFIG_FSL_DDR2)
1102         const unsigned int mclk_ps = get_memory_clk_period_ps();
1103 #endif
1104         dqs_en = !popts->DQS_config;
1105         rtt = fsl_ddr_get_rtt();
1106
1107         al = additive_latency;
1108
1109         esdmode = (0
1110                 | ((mrs & 0x3) << 14)
1111                 | ((outputs & 0x1) << 12)
1112                 | ((rdqs_en & 0x1) << 11)
1113                 | ((dqs_en & 0x1) << 10)
1114                 | ((ocd & 0x7) << 7)
1115                 | ((rtt & 0x2) << 5)   /* rtt field is split */
1116                 | ((al & 0x7) << 3)
1117                 | ((rtt & 0x1) << 2)   /* rtt field is split */
1118                 | ((ods & 0x1) << 1)
1119                 | ((dll_en & 0x1) << 0)
1120                 );
1121
1122         mr = 0;          /* FIXME: CHECKME */
1123
1124         /*
1125          * 0 = Fast Exit (Normal)
1126          * 1 = Slow Exit (Low Power)
1127          */
1128         pd = 0;
1129
1130 #if defined(CONFIG_FSL_DDR1)
1131         wr = 0;       /* Historical */
1132 #elif defined(CONFIG_FSL_DDR2)
1133         wr = (common_dimm->tWR_ps + mclk_ps - 1) / mclk_ps - 1;
1134 #endif
1135         dll_res = 0;
1136         mode = 0;
1137
1138 #if defined(CONFIG_FSL_DDR1)
1139         if (1 <= cas_latency && cas_latency <= 4) {
1140                 unsigned char mode_caslat_table[4] = {
1141                         0x5,    /* 1.5 clocks */
1142                         0x2,    /* 2.0 clocks */
1143                         0x6,    /* 2.5 clocks */
1144                         0x3     /* 3.0 clocks */
1145                 };
1146                 caslat = mode_caslat_table[cas_latency - 1];
1147         } else {
1148                 printf("Warning: unknown cas_latency %d\n", cas_latency);
1149         }
1150 #elif defined(CONFIG_FSL_DDR2)
1151         caslat = cas_latency;
1152 #endif
1153         bt = 0;
1154
1155         switch (popts->burst_length) {
1156         case DDR_BL4:
1157                 bl = 2;
1158                 break;
1159         case DDR_BL8:
1160                 bl = 3;
1161                 break;
1162         default:
1163                 printf("Error: invalid burst length of %u specified. "
1164                         " Defaulting to 4 beats.\n",
1165                         popts->burst_length);
1166                 bl = 2;
1167                 break;
1168         }
1169
1170         sdmode = (0
1171                   | ((mr & 0x3) << 14)
1172                   | ((pd & 0x1) << 12)
1173                   | ((wr & 0x7) << 9)
1174                   | ((dll_res & 0x1) << 8)
1175                   | ((mode & 0x1) << 7)
1176                   | ((caslat & 0x7) << 4)
1177                   | ((bt & 0x1) << 3)
1178                   | ((bl & 0x7) << 0)
1179                   );
1180
1181         ddr->ddr_sdram_mode = (0
1182                                | ((esdmode & 0xFFFF) << 16)
1183                                | ((sdmode & 0xFFFF) << 0)
1184                                );
1185         debug("FSLDDR: ddr_sdram_mode = 0x%08x\n", ddr->ddr_sdram_mode);
1186 }
1187 #endif
1188
1189 /* DDR SDRAM Data Initialization (DDR_DATA_INIT) */
1190 static void set_ddr_data_init(fsl_ddr_cfg_regs_t *ddr)
1191 {
1192         unsigned int init_value;        /* Initialization value */
1193
1194 #ifdef CONFIG_MEM_INIT_VALUE
1195         init_value = CONFIG_MEM_INIT_VALUE;
1196 #else
1197         init_value = 0xDEADBEEF;
1198 #endif
1199         ddr->ddr_data_init = init_value;
1200 }
1201
1202 /*
1203  * DDR SDRAM Clock Control (DDR_SDRAM_CLK_CNTL)
1204  * The old controller on the 8540/60 doesn't have this register.
1205  * Hope it's OK to set it (to 0) anyway.
1206  */
1207 static void set_ddr_sdram_clk_cntl(fsl_ddr_cfg_regs_t *ddr,
1208                                          const memctl_options_t *popts)
1209 {
1210         unsigned int clk_adjust;        /* Clock adjust */
1211
1212         clk_adjust = popts->clk_adjust;
1213         ddr->ddr_sdram_clk_cntl = (clk_adjust & 0xF) << 23;
1214         debug("FSLDDR: clk_cntl = 0x%08x\n", ddr->ddr_sdram_clk_cntl);
1215 }
1216
1217 /* DDR Initialization Address (DDR_INIT_ADDR) */
1218 static void set_ddr_init_addr(fsl_ddr_cfg_regs_t *ddr)
1219 {
1220         unsigned int init_addr = 0;     /* Initialization address */
1221
1222         ddr->ddr_init_addr = init_addr;
1223 }
1224
1225 /* DDR Initialization Address (DDR_INIT_EXT_ADDR) */
1226 static void set_ddr_init_ext_addr(fsl_ddr_cfg_regs_t *ddr)
1227 {
1228         unsigned int uia = 0;   /* Use initialization address */
1229         unsigned int init_ext_addr = 0; /* Initialization address */
1230
1231         ddr->ddr_init_ext_addr = (0
1232                                   | ((uia & 0x1) << 31)
1233                                   | (init_ext_addr & 0xF)
1234                                   );
1235 }
1236
1237 /* DDR SDRAM Timing Configuration 4 (TIMING_CFG_4) */
1238 static void set_timing_cfg_4(fsl_ddr_cfg_regs_t *ddr,
1239                                 const memctl_options_t *popts)
1240 {
1241         unsigned int rwt = 0; /* Read-to-write turnaround for same CS */
1242         unsigned int wrt = 0; /* Write-to-read turnaround for same CS */
1243         unsigned int rrt = 0; /* Read-to-read turnaround for same CS */
1244         unsigned int wwt = 0; /* Write-to-write turnaround for same CS */
1245         unsigned int dll_lock = 0; /* DDR SDRAM DLL Lock Time */
1246
1247 #if defined(CONFIG_FSL_DDR3)
1248         if (popts->burst_length == DDR_BL8) {
1249                 /* We set BL/2 for fixed BL8 */
1250                 rrt = 0;        /* BL/2 clocks */
1251                 wwt = 0;        /* BL/2 clocks */
1252         } else {
1253                 /* We need to set BL/2 + 2 to BC4 and OTF */
1254                 rrt = 2;        /* BL/2 + 2 clocks */
1255                 wwt = 2;        /* BL/2 + 2 clocks */
1256         }
1257         dll_lock = 1;   /* tDLLK = 512 clocks from spec */
1258 #endif
1259         ddr->timing_cfg_4 = (0
1260                              | ((rwt & 0xf) << 28)
1261                              | ((wrt & 0xf) << 24)
1262                              | ((rrt & 0xf) << 20)
1263                              | ((wwt & 0xf) << 16)
1264                              | (dll_lock & 0x3)
1265                              );
1266         debug("FSLDDR: timing_cfg_4 = 0x%08x\n", ddr->timing_cfg_4);
1267 }
1268
1269 /* DDR SDRAM Timing Configuration 5 (TIMING_CFG_5) */
1270 static void set_timing_cfg_5(fsl_ddr_cfg_regs_t *ddr, unsigned int cas_latency)
1271 {
1272         unsigned int rodt_on = 0;       /* Read to ODT on */
1273         unsigned int rodt_off = 0;      /* Read to ODT off */
1274         unsigned int wodt_on = 0;       /* Write to ODT on */
1275         unsigned int wodt_off = 0;      /* Write to ODT off */
1276
1277 #if defined(CONFIG_FSL_DDR3)
1278         /* rodt_on = timing_cfg_1[caslat] - timing_cfg_2[wrlat] + 1 */
1279         rodt_on = cas_latency - ((ddr->timing_cfg_2 & 0x00780000) >> 19) + 1;
1280         rodt_off = 4;   /*  4 clocks */
1281         wodt_on = 1;    /*  1 clocks */
1282         wodt_off = 4;   /*  4 clocks */
1283 #endif
1284
1285         ddr->timing_cfg_5 = (0
1286                              | ((rodt_on & 0x1f) << 24)
1287                              | ((rodt_off & 0x7) << 20)
1288                              | ((wodt_on & 0x1f) << 12)
1289                              | ((wodt_off & 0x7) << 8)
1290                              );
1291         debug("FSLDDR: timing_cfg_5 = 0x%08x\n", ddr->timing_cfg_5);
1292 }
1293
1294 /* DDR ZQ Calibration Control (DDR_ZQ_CNTL) */
1295 static void set_ddr_zq_cntl(fsl_ddr_cfg_regs_t *ddr, unsigned int zq_en)
1296 {
1297         unsigned int zqinit = 0;/* POR ZQ Calibration Time (tZQinit) */
1298         /* Normal Operation Full Calibration Time (tZQoper) */
1299         unsigned int zqoper = 0;
1300         /* Normal Operation Short Calibration Time (tZQCS) */
1301         unsigned int zqcs = 0;
1302
1303         if (zq_en) {
1304                 zqinit = 9;     /* 512 clocks */
1305                 zqoper = 8;     /* 256 clocks */
1306                 zqcs = 6;       /* 64 clocks */
1307         }
1308
1309         ddr->ddr_zq_cntl = (0
1310                             | ((zq_en & 0x1) << 31)
1311                             | ((zqinit & 0xF) << 24)
1312                             | ((zqoper & 0xF) << 16)
1313                             | ((zqcs & 0xF) << 8)
1314                             );
1315         debug("FSLDDR: zq_cntl = 0x%08x\n", ddr->ddr_zq_cntl);
1316 }
1317
1318 /* DDR Write Leveling Control (DDR_WRLVL_CNTL) */
1319 static void set_ddr_wrlvl_cntl(fsl_ddr_cfg_regs_t *ddr, unsigned int wrlvl_en,
1320                                 const memctl_options_t *popts)
1321 {
1322         /*
1323          * First DQS pulse rising edge after margining mode
1324          * is programmed (tWL_MRD)
1325          */
1326         unsigned int wrlvl_mrd = 0;
1327         /* ODT delay after margining mode is programmed (tWL_ODTEN) */
1328         unsigned int wrlvl_odten = 0;
1329         /* DQS/DQS_ delay after margining mode is programmed (tWL_DQSEN) */
1330         unsigned int wrlvl_dqsen = 0;
1331         /* WRLVL_SMPL: Write leveling sample time */
1332         unsigned int wrlvl_smpl = 0;
1333         /* WRLVL_WLR: Write leveling repeition time */
1334         unsigned int wrlvl_wlr = 0;
1335         /* WRLVL_START: Write leveling start time */
1336         unsigned int wrlvl_start = 0;
1337
1338         /* suggest enable write leveling for DDR3 due to fly-by topology */
1339         if (wrlvl_en) {
1340                 /* tWL_MRD min = 40 nCK, we set it 64 */
1341                 wrlvl_mrd = 0x6;
1342                 /* tWL_ODTEN 128 */
1343                 wrlvl_odten = 0x7;
1344                 /* tWL_DQSEN min = 25 nCK, we set it 32 */
1345                 wrlvl_dqsen = 0x5;
1346                 /*
1347                  * Write leveling sample time at least need 6 clocks
1348                  * higher than tWLO to allow enough time for progagation
1349                  * delay and sampling the prime data bits.
1350                  */
1351                 wrlvl_smpl = 0xf;
1352                 /*
1353                  * Write leveling repetition time
1354                  * at least tWLO + 6 clocks clocks
1355                  * we set it 64
1356                  */
1357                 wrlvl_wlr = 0x6;
1358                 /*
1359                  * Write leveling start time
1360                  * The value use for the DQS_ADJUST for the first sample
1361                  * when write leveling is enabled. It probably needs to be
1362                  * overriden per platform.
1363                  */
1364                 wrlvl_start = 0x8;
1365                 /*
1366                  * Override the write leveling sample and start time
1367                  * according to specific board
1368                  */
1369                 if (popts->wrlvl_override) {
1370                         wrlvl_smpl = popts->wrlvl_sample;
1371                         wrlvl_start = popts->wrlvl_start;
1372                 }
1373         }
1374
1375         ddr->ddr_wrlvl_cntl = (0
1376                                | ((wrlvl_en & 0x1) << 31)
1377                                | ((wrlvl_mrd & 0x7) << 24)
1378                                | ((wrlvl_odten & 0x7) << 20)
1379                                | ((wrlvl_dqsen & 0x7) << 16)
1380                                | ((wrlvl_smpl & 0xf) << 12)
1381                                | ((wrlvl_wlr & 0x7) << 8)
1382                                | ((wrlvl_start & 0x1F) << 0)
1383                                );
1384         debug("FSLDDR: wrlvl_cntl = 0x%08x\n", ddr->ddr_wrlvl_cntl);
1385         ddr->ddr_wrlvl_cntl_2 = popts->wrlvl_ctl_2;
1386         debug("FSLDDR: wrlvl_cntl_2 = 0x%08x\n", ddr->ddr_wrlvl_cntl_2);
1387         ddr->ddr_wrlvl_cntl_3 = popts->wrlvl_ctl_3;
1388         debug("FSLDDR: wrlvl_cntl_3 = 0x%08x\n", ddr->ddr_wrlvl_cntl_3);
1389
1390 }
1391
1392 /* DDR Self Refresh Counter (DDR_SR_CNTR) */
1393 static void set_ddr_sr_cntr(fsl_ddr_cfg_regs_t *ddr, unsigned int sr_it)
1394 {
1395         /* Self Refresh Idle Threshold */
1396         ddr->ddr_sr_cntr = (sr_it & 0xF) << 16;
1397 }
1398
1399 static void set_ddr_eor(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts)
1400 {
1401         if (popts->addr_hash) {
1402                 ddr->ddr_eor = 0x40000000;      /* address hash enable */
1403                 puts("Address hashing enabled.\n");
1404         }
1405 }
1406
1407 static void set_ddr_cdr1(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts)
1408 {
1409         ddr->ddr_cdr1 = popts->ddr_cdr1;
1410         debug("FSLDDR: ddr_cdr1 = 0x%08x\n", ddr->ddr_cdr1);
1411 }
1412
1413 static void set_ddr_cdr2(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts)
1414 {
1415         ddr->ddr_cdr2 = popts->ddr_cdr2;
1416         debug("FSLDDR: ddr_cdr2 = 0x%08x\n", ddr->ddr_cdr2);
1417 }
1418
1419 unsigned int
1420 check_fsl_memctl_config_regs(const fsl_ddr_cfg_regs_t *ddr)
1421 {
1422         unsigned int res = 0;
1423
1424         /*
1425          * Check that DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] are
1426          * not set at the same time.
1427          */
1428         if (ddr->ddr_sdram_cfg & 0x10000000
1429             && ddr->ddr_sdram_cfg & 0x00008000) {
1430                 printf("Error: DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] "
1431                                 " should not be set at the same time.\n");
1432                 res++;
1433         }
1434
1435         return res;
1436 }
1437
1438 unsigned int
1439 compute_fsl_memctl_config_regs(const memctl_options_t *popts,
1440                                fsl_ddr_cfg_regs_t *ddr,
1441                                const common_timing_params_t *common_dimm,
1442                                const dimm_params_t *dimm_params,
1443                                unsigned int dbw_cap_adj,
1444                                unsigned int size_only)
1445 {
1446         unsigned int i;
1447         unsigned int cas_latency;
1448         unsigned int additive_latency;
1449         unsigned int sr_it;
1450         unsigned int zq_en;
1451         unsigned int wrlvl_en;
1452         unsigned int ip_rev = 0;
1453         unsigned int unq_mrs_en = 0;
1454         int cs_en = 1;
1455
1456         memset(ddr, 0, sizeof(fsl_ddr_cfg_regs_t));
1457
1458         if (common_dimm == NULL) {
1459                 printf("Error: subset DIMM params struct null pointer\n");
1460                 return 1;
1461         }
1462
1463         /*
1464          * Process overrides first.
1465          *
1466          * FIXME: somehow add dereated caslat to this
1467          */
1468         cas_latency = (popts->cas_latency_override)
1469                 ? popts->cas_latency_override_value
1470                 : common_dimm->lowest_common_SPD_caslat;
1471
1472         additive_latency = (popts->additive_latency_override)
1473                 ? popts->additive_latency_override_value
1474                 : common_dimm->additive_latency;
1475
1476         sr_it = (popts->auto_self_refresh_en)
1477                 ? popts->sr_it
1478                 : 0;
1479         /* ZQ calibration */
1480         zq_en = (popts->zq_en) ? 1 : 0;
1481         /* write leveling */
1482         wrlvl_en = (popts->wrlvl_en) ? 1 : 0;
1483
1484         /* Chip Select Memory Bounds (CSn_BNDS) */
1485         for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
1486                 unsigned long long ea, sa;
1487                 unsigned int cs_per_dimm
1488                         = CONFIG_CHIP_SELECTS_PER_CTRL / CONFIG_DIMM_SLOTS_PER_CTLR;
1489                 unsigned int dimm_number
1490                         = i / cs_per_dimm;
1491                 unsigned long long rank_density
1492                         = dimm_params[dimm_number].rank_density >> dbw_cap_adj;
1493
1494                 if (dimm_params[dimm_number].n_ranks == 0) {
1495                         debug("Skipping setup of CS%u "
1496                                 "because n_ranks on DIMM %u is 0\n", i, dimm_number);
1497                         continue;
1498                 }
1499                 if (popts->memctl_interleaving) {
1500                         switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
1501                         case FSL_DDR_CS0_CS1_CS2_CS3:
1502                                 break;
1503                         case FSL_DDR_CS0_CS1:
1504                         case FSL_DDR_CS0_CS1_AND_CS2_CS3:
1505                                 if (i > 1)
1506                                         cs_en = 0;
1507                                 break;
1508                         case FSL_DDR_CS2_CS3:
1509                         default:
1510                                 if (i > 0)
1511                                         cs_en = 0;
1512                                 break;
1513                         }
1514                         sa = common_dimm->base_address;
1515                         ea = sa + common_dimm->total_mem - 1;
1516                 } else if (!popts->memctl_interleaving) {
1517                         /*
1518                          * If memory interleaving between controllers is NOT
1519                          * enabled, the starting address for each memory
1520                          * controller is distinct.  However, because rank
1521                          * interleaving is enabled, the starting and ending
1522                          * addresses of the total memory on that memory
1523                          * controller needs to be programmed into its
1524                          * respective CS0_BNDS.
1525                          */
1526                         switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
1527                         case FSL_DDR_CS0_CS1_CS2_CS3:
1528                                 sa = common_dimm->base_address;
1529                                 ea = sa + common_dimm->total_mem - 1;
1530                                 break;
1531                         case FSL_DDR_CS0_CS1_AND_CS2_CS3:
1532                                 if ((i >= 2) && (dimm_number == 0)) {
1533                                         sa = dimm_params[dimm_number].base_address +
1534                                               2 * rank_density;
1535                                         ea = sa + 2 * rank_density - 1;
1536                                 } else {
1537                                         sa = dimm_params[dimm_number].base_address;
1538                                         ea = sa + 2 * rank_density - 1;
1539                                 }
1540                                 break;
1541                         case FSL_DDR_CS0_CS1:
1542                                 if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) {
1543                                         sa = dimm_params[dimm_number].base_address;
1544                                         ea = sa + rank_density - 1;
1545                                         if (i != 1)
1546                                                 sa += (i % cs_per_dimm) * rank_density;
1547                                         ea += (i % cs_per_dimm) * rank_density;
1548                                 } else {
1549                                         sa = 0;
1550                                         ea = 0;
1551                                 }
1552                                 if (i == 0)
1553                                         ea += rank_density;
1554                                 break;
1555                         case FSL_DDR_CS2_CS3:
1556                                 if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) {
1557                                         sa = dimm_params[dimm_number].base_address;
1558                                         ea = sa + rank_density - 1;
1559                                         if (i != 3)
1560                                                 sa += (i % cs_per_dimm) * rank_density;
1561                                         ea += (i % cs_per_dimm) * rank_density;
1562                                 } else {
1563                                         sa = 0;
1564                                         ea = 0;
1565                                 }
1566                                 if (i == 2)
1567                                         ea += (rank_density >> dbw_cap_adj);
1568                                 break;
1569                         default:  /* No bank(chip-select) interleaving */
1570                                 sa = dimm_params[dimm_number].base_address;
1571                                 ea = sa + rank_density - 1;
1572                                 if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) {
1573                                         sa += (i % cs_per_dimm) * rank_density;
1574                                         ea += (i % cs_per_dimm) * rank_density;
1575                                 } else {
1576                                         sa = 0;
1577                                         ea = 0;
1578                                 }
1579                                 break;
1580                         }
1581                 }
1582
1583                 sa >>= 24;
1584                 ea >>= 24;
1585
1586                 if (cs_en) {
1587                         ddr->cs[i].bnds = (0
1588                                 | ((sa & 0xFFF) << 16)/* starting address MSB */
1589                                 | ((ea & 0xFFF) << 0)   /* ending address MSB */
1590                                 );
1591                 } else {
1592                         /* setting bnds to 0xffffffff for inactive CS */
1593                         ddr->cs[i].bnds = 0xffffffff;
1594                 }
1595
1596                 debug("FSLDDR: cs[%d]_bnds = 0x%08x\n", i, ddr->cs[i].bnds);
1597                 set_csn_config(dimm_number, i, ddr, popts, dimm_params);
1598                 set_csn_config_2(i, ddr);
1599         }
1600
1601         /*
1602          * In the case we only need to compute the ddr sdram size, we only need
1603          * to set csn registers, so return from here.
1604          */
1605         if (size_only)
1606                 return 0;
1607
1608         set_ddr_eor(ddr, popts);
1609
1610 #if !defined(CONFIG_FSL_DDR1)
1611         set_timing_cfg_0(ddr, popts, dimm_params);
1612 #endif
1613
1614         set_timing_cfg_3(ddr, popts, common_dimm, cas_latency);
1615         set_timing_cfg_1(ddr, popts, common_dimm, cas_latency);
1616         set_timing_cfg_2(ddr, popts, common_dimm,
1617                                 cas_latency, additive_latency);
1618
1619         set_ddr_cdr1(ddr, popts);
1620         set_ddr_cdr2(ddr, popts);
1621         set_ddr_sdram_cfg(ddr, popts, common_dimm);
1622         ip_rev = fsl_ddr_get_version();
1623         if (ip_rev > 0x40400)
1624                 unq_mrs_en = 1;
1625
1626         set_ddr_sdram_cfg_2(ddr, popts, unq_mrs_en);
1627         set_ddr_sdram_mode(ddr, popts, common_dimm,
1628                                 cas_latency, additive_latency, unq_mrs_en);
1629         set_ddr_sdram_mode_2(ddr, popts, unq_mrs_en);
1630         set_ddr_sdram_interval(ddr, popts, common_dimm);
1631         set_ddr_data_init(ddr);
1632         set_ddr_sdram_clk_cntl(ddr, popts);
1633         set_ddr_init_addr(ddr);
1634         set_ddr_init_ext_addr(ddr);
1635         set_timing_cfg_4(ddr, popts);
1636         set_timing_cfg_5(ddr, cas_latency);
1637
1638         set_ddr_zq_cntl(ddr, zq_en);
1639         set_ddr_wrlvl_cntl(ddr, wrlvl_en, popts);
1640
1641         set_ddr_sr_cntr(ddr, sr_it);
1642
1643         set_ddr_sdram_rcw(ddr, popts, common_dimm);
1644
1645 #ifdef CONFIG_SYS_FSL_DDR_EMU
1646         /* disble DDR training for emulator */
1647         ddr->debug[2] = 0x00000400;
1648         ddr->debug[4] = 0xff800000;
1649 #endif
1650         return check_fsl_memctl_config_regs(ddr);
1651 }