cpu/mpc8xxx/ddr/ctrl_regs.c

   1 /*
   2  * Copyright 2008 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 <asm/fsl_ddr_sdram.h>
  17
  18 #include "ddr.h"
  19
  20 extern unsigned int picos_to_mclk(unsigned int picos);
  21 /*
  22  * Determine Rtt value.
  23  *
  24  * This should likely be either board or controller specific.
  25  *
  26  * Rtt(nominal):
  27  *      0 = Rtt disabled
  28  *      1 = 75 ohm
  29  *      2 = 150 ohm
  30  *      3 = 50 ohm
  31  *
  32  * FIXME: Apparently 8641 needs a value of 2
  33  * FIXME: Old code seys if 667 MHz or higher, use 3 on 8572
  34  *
  35  * FIXME: There was some effort down this line earlier:
  36  *
  37  *      unsigned int i;
  38  *      for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL/2; i++) {
  39  *              if (popts->dimmslot[i].num_valid_cs
  40  *                  && (popts->cs_local_opts[2*i].odt_rd_cfg
  41  *                      || popts->cs_local_opts[2*i].odt_wr_cfg)) {
  42  *                      rtt = 2;
  43  *                      break;
  44  *              }
  45  *      }
  46  */
  47 static inline int fsl_ddr_get_rtt(void)
  48 {
  49         int rtt;
  50
  51 #if defined(CONFIG_FSL_DDR1)
  52         rtt = 0;
  53 #elif defined(CONFIG_FSL_DDR2)
  54         rtt = 3;
  55 #else
  56 #error "Need Rtt value for DDR3"
  57 #endif
  58
  59         return rtt;
  60 }
  61
  62 /* Chip Select Configuration (CSn_CONFIG) */
  63 static void set_csn_config(int i, fsl_ddr_cfg_regs_t *ddr,
  64                                const memctl_options_t *popts,
  65                                const dimm_params_t *dimm_params)
  66 {
  67         unsigned int cs_n_en = 0; /* Chip Select enable */
  68         unsigned int intlv_en = 0; /* Memory controller interleave enable */
  69         unsigned int intlv_ctl = 0; /* Interleaving control */
  70         unsigned int ap_n_en = 0; /* Chip select n auto-precharge enable */
  71         unsigned int odt_rd_cfg = 0; /* ODT for reads configuration */
  72         unsigned int odt_wr_cfg = 0; /* ODT for writes configuration */
  73         unsigned int ba_bits_cs_n = 0; /* Num of bank bits for SDRAM on CSn */
  74         unsigned int row_bits_cs_n = 0; /* Num of row bits for SDRAM on CSn */
  75         unsigned int col_bits_cs_n = 0; /* Num of ocl bits for SDRAM on CSn */
  76
  77         /* Compute CS_CONFIG only for existing ranks of each DIMM.  */
  78         if ((((i&1) == 0)
  79             && (dimm_params[i/2].n_ranks == 1))
  80             || (dimm_params[i/2].n_ranks == 2)) {
  81                 unsigned int n_banks_per_sdram_device;
  82                 cs_n_en = 1;
  83                 if (i == 0) {
  84                         /* These fields only available in CS0_CONFIG */
  85                         intlv_en = popts->memctl_interleaving;
  86                         intlv_ctl = popts->memctl_interleaving_mode;
  87                 }
  88                 ap_n_en = popts->cs_local_opts[i].auto_precharge;
  89                 odt_rd_cfg = popts->cs_local_opts[i].odt_rd_cfg;
  90                 odt_wr_cfg = popts->cs_local_opts[i].odt_wr_cfg;
  91                 n_banks_per_sdram_device
  92                         = dimm_params[i/2].n_banks_per_sdram_device;
  93                 ba_bits_cs_n = __ilog2(n_banks_per_sdram_device) - 2;
  94                 row_bits_cs_n = dimm_params[i/2].n_row_addr - 12;
  95                 col_bits_cs_n = dimm_params[i/2].n_col_addr - 8;
  96         }
  97
  98         ddr->cs[i].config = (0
  99                 | ((cs_n_en & 0x1) << 31)
 100                 | ((intlv_en & 0x3) << 29)
 101                 | ((intlv_ctl & 0xf) << 24)
 102                 | ((ap_n_en & 0x1) << 23)
 103
 104                 /* XXX: some implementation only have 1 bit starting at left */
 105                 | ((odt_rd_cfg & 0x7) << 20)
 106
 107                 /* XXX: Some implementation only have 1 bit starting at left */
 108                 | ((odt_wr_cfg & 0x7) << 16)
 109
 110                 | ((ba_bits_cs_n & 0x3) << 14)
 111                 | ((row_bits_cs_n & 0x7) << 8)
 112                 | ((col_bits_cs_n & 0x7) << 0)
 113                 );
 114         debug("FSLDDR: cs[%d]_config = 0x%08x\n", i,ddr->cs[i].config);
 115 }
 116
 117 /* Chip Select Configuration 2 (CSn_CONFIG_2) */
 118 /* FIXME: 8572 */
 119 static void set_csn_config_2(int i, fsl_ddr_cfg_regs_t *ddr)
 120 {
 121         unsigned int pasr_cfg = 0;      /* Partial array self refresh config */
 122
 123         ddr->cs[i].config_2 = ((pasr_cfg & 7) << 24);
 124         debug("FSLDDR: cs[%d]_config_2 = 0x%08x\n", i, ddr->cs[i].config_2);
 125 }
 126
 127 /* -3E = 667 CL5, -25 = CL6 800, -25E = CL5 800 */
 128
 129 #if defined(CONFIG_FSL_DDR2)
 130 /*
 131  * DDR SDRAM Timing Configuration 0 (TIMING_CFG_0)
 132  *
 133  * Avoid writing for DDR I.  The new PQ38 DDR controller
 134  * dreams up non-zero default values to be backwards compatible.
 135  */
 136 static void set_timing_cfg_0(fsl_ddr_cfg_regs_t *ddr)
 137 {
 138         unsigned char trwt_mclk = 0;   /* Read-to-write turnaround */
 139         unsigned char twrt_mclk = 0;   /* Write-to-read turnaround */
 140         /* 7.5 ns on -3E; 0 means WL - CL + BL/2 + 1 */
 141         unsigned char trrt_mclk = 0;   /* Read-to-read turnaround */
 142         unsigned char twwt_mclk = 0;   /* Write-to-write turnaround */
 143
 144         /* Active powerdown exit timing (tXARD and tXARDS). */
 145         unsigned char act_pd_exit_mclk;
 146         /* Precharge powerdown exit timing (tXP). */
 147         unsigned char pre_pd_exit_mclk;
 148         /* Precharge powerdown exit timing (tAXPD). */
 149         unsigned char taxpd_mclk;
 150         /* Mode register set cycle time (tMRD). */
 151         unsigned char tmrd_mclk;
 152
 153         /* (tXARD and tXARDS). Empirical? */
 154         act_pd_exit_mclk = 2;
 155
 156         /* XXX:  tXARD = 2, tXARDS = 7 - AL. * Empirical? */
 157         pre_pd_exit_mclk = 6;
 158
 159         /* FIXME:  tXP = 2 on Micron 667 MHz DIMM */
 160         taxpd_mclk = 8;
 161
 162         tmrd_mclk = 2;
 163
 164         ddr->timing_cfg_0 = (0
 165                 | ((trwt_mclk & 0x3) << 30)     /* RWT */
 166                 | ((twrt_mclk & 0x3) << 28)     /* WRT */
 167                 | ((trrt_mclk & 0x3) << 26)     /* RRT */
 168                 | ((twwt_mclk & 0x3) << 24)     /* WWT */
 169                 | ((act_pd_exit_mclk & 0x7) << 20)  /* ACT_PD_EXIT */
 170                 | ((pre_pd_exit_mclk & 0x7) << 16)  /* PRE_PD_EXIT */
 171                 | ((taxpd_mclk & 0xf) << 8)     /* ODT_PD_EXIT */
 172                 | ((tmrd_mclk & 0xf) << 0)      /* MRS_CYC */
 173                 );
 174         debug("FSLDDR: timing_cfg_0 = 0x%08x\n", ddr->timing_cfg_0);
 175 }
 176 #endif  /* defined(CONFIG_FSL_DDR2) */
 177
 178 /* DDR SDRAM Timing Configuration 3 (TIMING_CFG_3) */
 179 static void set_timing_cfg_3(fsl_ddr_cfg_regs_t *ddr,
 180                                const common_timing_params_t *common_dimm)
 181 {
 182         /* Extended Activate to precharge interval (tRAS) */
 183         unsigned int ext_acttopre = 0;
 184         unsigned int ext_refrec; /* Extended refresh recovery time (tRFC) */
 185         unsigned int ext_caslat = 0; /* Extended MCAS latency from READ cmd */
 186         unsigned int cntl_adj = 0; /* Control Adjust */
 187
 188         ext_refrec = (picos_to_mclk(common_dimm->tRFC_ps) - 8) >> 4;
 189         ddr->timing_cfg_3 = (0
 190                 | ((ext_acttopre & 0x1) << 24)
 191                 | ((ext_refrec & 0x7) << 16)
 192                 | ((ext_caslat & 0x1) << 12)
 193                 | ((cntl_adj & 0x7) << 0)
 194                 );
 195         debug("FSLDDR: timing_cfg_3 = 0x%08x\n", ddr->timing_cfg_3);
 196 }
 197
 198 /* DDR SDRAM Timing Configuration 1 (TIMING_CFG_1) */
 199 static void set_timing_cfg_1(fsl_ddr_cfg_regs_t *ddr,
 200                                const common_timing_params_t *common_dimm,
 201                                unsigned int cas_latency)
 202 {
 203         /* Precharge-to-activate interval (tRP) */
 204         unsigned char pretoact_mclk;
 205         /* Activate to precharge interval (tRAS) */
 206         unsigned char acttopre_mclk;
 207         /*  Activate to read/write interval (tRCD) */
 208         unsigned char acttorw_mclk;
 209         /* CASLAT */
 210         unsigned char caslat_ctrl;
 211         /*  Refresh recovery time (tRFC) ; trfc_low */
 212         unsigned char refrec_ctrl;
 213         /* Last data to precharge minimum interval (tWR) */
 214         unsigned char wrrec_mclk;
 215         /* Activate-to-activate interval (tRRD) */
 216         unsigned char acttoact_mclk;
 217         /* Last write data pair to read command issue interval (tWTR) */
 218         unsigned char wrtord_mclk;
 219
 220         pretoact_mclk = picos_to_mclk(common_dimm->tRP_ps);
 221         acttopre_mclk = picos_to_mclk(common_dimm->tRAS_ps);
 222         acttorw_mclk = picos_to_mclk(common_dimm->tRCD_ps);
 223
 224         /*
 225          * Translate CAS Latency to a DDR controller field value:
 226          *
 227          *      CAS Lat DDR I   DDR II  Ctrl
 228          *      Clocks  SPD Bit SPD Bit Value
 229          *      ------- ------- ------- -----
 230          *      1.0     0               0001
 231          *      1.5     1               0010
 232          *      2.0     2       2       0011
 233          *      2.5     3               0100
 234          *      3.0     4       3       0101
 235          *      3.5     5               0110
 236          *      4.0             4       0111
 237          *      4.5                     1000
 238          *      5.0             5       1001
 239          */
 240 #if defined(CONFIG_FSL_DDR1)
 241         caslat_ctrl = (cas_latency + 1) & 0x07;
 242 #elif defined(CONFIG_FSL_DDR2)
 243         caslat_ctrl = 2 * cas_latency - 1;
 244 #else
 245 #error "Need CAS Latency help for DDR3 in fsl_ddr_sdram.c"
 246 #endif
 247
 248         refrec_ctrl = picos_to_mclk(common_dimm->tRFC_ps) - 8;
 249         wrrec_mclk = picos_to_mclk(common_dimm->tWR_ps);
 250         acttoact_mclk = picos_to_mclk(common_dimm->tRRD_ps);
 251         wrtord_mclk = picos_to_mclk(common_dimm->tWTR_ps);
 252
 253         ddr->timing_cfg_1 = (0
 254                 | ((pretoact_mclk & 0x07) << 28)
 255                 | ((acttopre_mclk & 0x0F) << 24)
 256                 | ((acttorw_mclk & 0x7) << 20)
 257                 | ((caslat_ctrl & 0xF) << 16)
 258                 | ((refrec_ctrl & 0xF) << 12)
 259                 | ((wrrec_mclk & 0x07) << 8)
 260                 | ((acttoact_mclk & 0x07) << 4)
 261                 | ((wrtord_mclk & 0x07) << 0)
 262                 );
 263         debug("FSLDDR: timing_cfg_1 = 0x%08x\n", ddr->timing_cfg_1);
 264 }
 265
 266 /* DDR SDRAM Timing Configuration 2 (TIMING_CFG_2) */
 267 static void set_timing_cfg_2(fsl_ddr_cfg_regs_t *ddr,
 268                                const memctl_options_t *popts,
 269                                const common_timing_params_t *common_dimm,
 270                                unsigned int cas_latency,
 271                                unsigned int additive_latency)
 272 {
 273         /* Additive latency */
 274         unsigned char add_lat_mclk;
 275         /* CAS-to-preamble override */
 276         unsigned short cpo;
 277         /* Write latency */
 278         unsigned char wr_lat;
 279         /*  Read to precharge (tRTP) */
 280         unsigned char rd_to_pre;
 281         /* Write command to write data strobe timing adjustment */
 282         unsigned char wr_data_delay;
 283         /* Minimum CKE pulse width (tCKE) */
 284         unsigned char cke_pls;
 285         /* Window for four activates (tFAW) */
 286         unsigned short four_act;
 287
 288         /* FIXME add check that this must be less than acttorw_mclk */
 289         add_lat_mclk = additive_latency;
 290         cpo = popts->cpo_override;
 291
 292 #if defined(CONFIG_FSL_DDR1)
 293         /*
 294          * This is a lie.  It should really be 1, but if it is
 295          * set to 1, bits overlap into the old controller's
 296          * otherwise unused ACSM field.  If we leave it 0, then
 297          * the HW will magically treat it as 1 for DDR 1.  Oh Yea.
 298          */
 299         wr_lat = 0;
 300 #elif defined(CONFIG_FSL_DDR2)
 301         wr_lat = cas_latency + additive_latency - 1;
 302 #else
 303 #error "Fix WR_LAT for DDR3"
 304 #endif
 305
 306         rd_to_pre = picos_to_mclk(common_dimm->tRTP_ps);
 307         wr_data_delay = popts->write_data_delay;
 308         cke_pls = picos_to_mclk(popts->tCKE_clock_pulse_width_ps);
 309         four_act = picos_to_mclk(popts->tFAW_window_four_activates_ps);
 310
 311         ddr->timing_cfg_2 = (0
 312                 | ((add_lat_mclk & 0x7) << 28)
 313                 | ((cpo & 0x1f) << 23)
 314                 | ((wr_lat & 0x7) << 19)
 315                 | ((rd_to_pre & 0x7) << 13)
 316                 | ((wr_data_delay & 0x7) << 10)
 317                 | ((cke_pls & 0x7) << 6)
 318                 | ((four_act & 0x1f) << 0)
 319                 );
 320         debug("FSLDDR: timing_cfg_2 = 0x%08x\n", ddr->timing_cfg_2);
 321 }
 322
 323 /* DDR SDRAM control configuration (DDR_SDRAM_CFG) */
 324 static void set_ddr_sdram_cfg(fsl_ddr_cfg_regs_t *ddr,
 325                                const memctl_options_t *popts,
 326                                const common_timing_params_t *common_dimm)
 327 {
 328         unsigned int mem_en;            /* DDR SDRAM interface logic enable */
 329         unsigned int sren;              /* Self refresh enable (during sleep) */
 330         unsigned int ecc_en;            /* ECC enable. */
 331         unsigned int rd_en;             /* Registered DIMM enable */
 332         unsigned int sdram_type;        /* Type of SDRAM */
 333         unsigned int dyn_pwr;           /* Dynamic power management mode */
 334         unsigned int dbw;               /* DRAM dta bus width */
 335         unsigned int eight_be;          /* 8-beat burst enable */
 336         unsigned int ncap = 0;          /* Non-concurrent auto-precharge */
 337         unsigned int threeT_en;         /* Enable 3T timing */
 338         unsigned int twoT_en;           /* Enable 2T timing */
 339         unsigned int ba_intlv_ctl;      /* Bank (CS) interleaving control */
 340         unsigned int x32_en = 0;        /* x32 enable */
 341         unsigned int pchb8 = 0;         /* precharge bit 8 enable */
 342         unsigned int hse;               /* Global half strength override */
 343         unsigned int mem_halt = 0;      /* memory controller halt */
 344         unsigned int bi = 0;            /* Bypass initialization */
 345
 346         mem_en = 1;
 347         sren = popts->self_refresh_in_sleep;
 348         if (common_dimm->all_DIMMs_ECC_capable) {
 349                 /* Allow setting of ECC only if all DIMMs are ECC. */
 350                 ecc_en = popts->ECC_mode;
 351         } else {
 352                 ecc_en = 0;
 353         }
 354
 355         rd_en = (common_dimm->all_DIMMs_registered
 356                  && !common_dimm->all_DIMMs_unbuffered);
 357
 358         sdram_type = CONFIG_FSL_SDRAM_TYPE;
 359
 360         dyn_pwr = popts->dynamic_power;
 361         dbw = popts->data_bus_width;
 362         eight_be = 0;           /* always 0 for DDR2 */
 363         threeT_en = popts->threeT_en;
 364         twoT_en = popts->twoT_en;
 365         ba_intlv_ctl = popts->ba_intlv_ctl;
 366         hse = popts->half_strength_driver_enable;
 367
 368         ddr->ddr_sdram_cfg = (0
 369                         | ((mem_en & 0x1) << 31)
 370                         | ((sren & 0x1) << 30)
 371                         | ((ecc_en & 0x1) << 29)
 372                         | ((rd_en & 0x1) << 28)
 373                         | ((sdram_type & 0x7) << 24)
 374                         | ((dyn_pwr & 0x1) << 21)
 375                         | ((dbw & 0x3) << 19)
 376                         | ((eight_be & 0x1) << 18)
 377                         | ((ncap & 0x1) << 17)
 378                         | ((threeT_en & 0x1) << 16)
 379                         | ((twoT_en & 0x1) << 15)
 380                         | ((ba_intlv_ctl & 0x7F) << 8)
 381                         | ((x32_en & 0x1) << 5)
 382                         | ((pchb8 & 0x1) << 4)
 383                         | ((hse & 0x1) << 3)
 384                         | ((mem_halt & 0x1) << 1)
 385                         | ((bi & 0x1) << 0)
 386                         );
 387         debug("FSLDDR: ddr_sdram_cfg = 0x%08x\n", ddr->ddr_sdram_cfg);
 388 }
 389
 390 /* DDR SDRAM control configuration 2 (DDR_SDRAM_CFG_2) */
 391 static void set_ddr_sdram_cfg_2(fsl_ddr_cfg_regs_t *ddr,
 392                                const memctl_options_t *popts)
 393 {
 394         unsigned int frc_sr = 0;        /* Force self refresh */
 395         unsigned int sr_ie = 0;         /* Self-refresh interrupt enable */
 396         unsigned int dll_rst_dis;       /* DLL reset disable */
 397         unsigned int dqs_cfg;           /* DQS configuration */
 398         unsigned int odt_cfg;           /* ODT configuration */
 399         unsigned int num_pr;            /* Number of posted refreshes */
 400         unsigned int obc_cfg;           /* On-The-Fly Burst Chop Cfg */
 401         unsigned int ap_en;             /* Address Parity Enable */
 402         unsigned int d_init;            /* DRAM data initialization */
 403         unsigned int rcw_en = 0;        /* Register Control Word Enable */
 404         unsigned int md_en = 0;         /* Mirrored DIMM Enable */
 405
 406         dll_rst_dis = 1;        /* Make this configurable */
 407         dqs_cfg = popts->DQS_config;
 408         if (popts->cs_local_opts[0].odt_rd_cfg
 409             || popts->cs_local_opts[0].odt_wr_cfg) {
 410                 /* FIXME */
 411                 odt_cfg = 2;
 412         } else {
 413                 odt_cfg = 0;
 414         }
 415
 416         num_pr = 1;     /* Make this configurable */
 417
 418         /*
 419          * 8572 manual says
 420          *     {TIMING_CFG_1[PRETOACT]
 421          *      + [DDR_SDRAM_CFG_2[NUM_PR]
 422          *        * ({EXT_REFREC || REFREC} + 8 + 2)]}
 423          *      << DDR_SDRAM_INTERVAL[REFINT]
 424          */
 425
 426         obc_cfg = 0;    /* Make this configurable? */
 427         ap_en = 0;      /* Make this configurable? */
 428
 429 #if defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
 430         /* Use the DDR controller to auto initialize memory. */
 431         d_init = 1;
 432         ddr->ddr_data_init = CONFIG_MEM_INIT_VALUE;
 433         debug("DDR: ddr_data_init = 0x%08x\n", ddr->ddr_data_init);
 434 #else
 435         /* Memory will be initialized via DMA, or not at all. */
 436         d_init = 0;
 437 #endif
 438
 439         ddr->ddr_sdram_cfg_2 = (0
 440                 | ((frc_sr & 0x1) << 31)
 441                 | ((sr_ie & 0x1) << 30)
 442                 | ((dll_rst_dis & 0x1) << 29)
 443                 | ((dqs_cfg & 0x3) << 26)
 444                 | ((odt_cfg & 0x3) << 21)
 445                 | ((num_pr & 0xf) << 12)
 446                 | ((obc_cfg & 0x1) << 6)
 447                 | ((ap_en & 0x1) << 5)
 448                 | ((d_init & 0x1) << 4)
 449                 | ((rcw_en & 0x1) << 2)
 450                 | ((md_en & 0x1) << 0)
 451                 );
 452         debug("FSLDDR: ddr_sdram_cfg_2 = 0x%08x\n", ddr->ddr_sdram_cfg_2);
 453 }
 454
 455 /* DDR SDRAM Mode configuration 2 (DDR_SDRAM_MODE_2) */
 456 static void set_ddr_sdram_mode_2(fsl_ddr_cfg_regs_t *ddr)
 457 {
 458         unsigned short esdmode2 = 0;    /* Extended SDRAM mode 2 */
 459         unsigned short esdmode3 = 0;    /* Extended SDRAM mode 3 */
 460
 461         ddr->ddr_sdram_mode_2 = (0
 462                                  | ((esdmode2 & 0xFFFF) << 16)
 463                                  | ((esdmode3 & 0xFFFF) << 0)
 464                                  );
 465         debug("FSLDDR: ddr_sdram_mode_2 = 0x%08x\n", ddr->ddr_sdram_mode_2);
 466 }
 467
 468 /* DDR SDRAM Interval Configuration (DDR_SDRAM_INTERVAL) */
 469 static void set_ddr_sdram_interval(fsl_ddr_cfg_regs_t *ddr,
 470                                const memctl_options_t *popts,
 471                                const common_timing_params_t *common_dimm)
 472 {
 473         unsigned int refint;    /* Refresh interval */
 474         unsigned int bstopre;   /* Precharge interval */
 475
 476         refint = picos_to_mclk(common_dimm->refresh_rate_ps);
 477
 478         bstopre = popts->bstopre;
 479
 480         /* refint field used 0x3FFF in earlier controllers */
 481         ddr->ddr_sdram_interval = (0
 482                                    | ((refint & 0xFFFF) << 16)
 483                                    | ((bstopre & 0x3FFF) << 0)
 484                                    );
 485         debug("FSLDDR: ddr_sdram_interval = 0x%08x\n", ddr->ddr_sdram_interval);
 486 }
 487
 488 /* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */
 489 static void set_ddr_sdram_mode(fsl_ddr_cfg_regs_t *ddr,
 490                                const memctl_options_t *popts,
 491                                const common_timing_params_t *common_dimm,
 492                                unsigned int cas_latency,
 493                                unsigned int additive_latency)
 494 {
 495         unsigned short esdmode;         /* Extended SDRAM mode */
 496         unsigned short sdmode;          /* SDRAM mode */
 497
 498         /*
 499          * FIXME: This ought to be pre-calculated in a
 500          * technology-specific routine,
 501          * e.g. compute_DDR2_mode_register(), and then the
 502          * sdmode and esdmode passed in as part of common_dimm.
 503          */
 504
 505         /* Extended Mode Register */
 506         unsigned int mrs = 0;           /* Mode Register Set */
 507         unsigned int outputs = 0;       /* 0=Enabled, 1=Disabled */
 508         unsigned int rdqs_en = 0;       /* RDQS Enable: 0=no, 1=yes */
 509         unsigned int dqs_en = 0;        /* DQS# Enable: 0=enable, 1=disable */
 510         unsigned int ocd = 0;           /* 0x0=OCD not supported,
 511                                            0x7=OCD default state */
 512         unsigned int rtt;
 513         unsigned int al;                /* Posted CAS# additive latency (AL) */
 514         unsigned int ods = 0;           /* Output Drive Strength:
 515                                                 0 = Full strength (18ohm)
 516                                                 1 = Reduced strength (4ohm) */
 517         unsigned int dll_en = 0;        /* DLL Enable  0=Enable (Normal),
 518                                                        1=Disable (Test/Debug) */
 519
 520         /* Mode Register (MR) */
 521         unsigned int mr;        /* Mode Register Definition */
 522         unsigned int pd;        /* Power-Down Mode */
 523         unsigned int wr;        /* Write Recovery */
 524         unsigned int dll_res;   /* DLL Reset */
 525         unsigned int mode;      /* Normal=0 or Test=1 */
 526         unsigned int caslat = 0;/* CAS# latency */
 527         /* BT: Burst Type (0=Sequential, 1=Interleaved) */
 528         unsigned int bt;
 529         unsigned int bl;        /* BL: Burst Length */
 530
 531 #if defined(CONFIG_FSL_DDR2)
 532         const unsigned int mclk_ps = get_memory_clk_period_ps();
 533 #endif
 534
 535         rtt = fsl_ddr_get_rtt();
 536
 537         al = additive_latency;
 538
 539         esdmode = (0
 540                 | ((mrs & 0x3) << 14)
 541                 | ((outputs & 0x1) << 12)
 542                 | ((rdqs_en & 0x1) << 11)
 543                 | ((dqs_en & 0x1) << 10)
 544                 | ((ocd & 0x7) << 7)
 545                 | ((rtt & 0x2) << 5)   /* rtt field is split */
 546                 | ((al & 0x7) << 3)
 547                 | ((rtt & 0x1) << 2)   /* rtt field is split */
 548                 | ((ods & 0x1) << 1)
 549                 | ((dll_en & 0x1) << 0)
 550                 );
 551
 552         mr = 0;          /* FIXME: CHECKME */
 553
 554         /*
 555          * 0 = Fast Exit (Normal)
 556          * 1 = Slow Exit (Low Power)
 557          */
 558         pd = 0;
 559
 560 #if defined(CONFIG_FSL_DDR1)
 561         wr = 0;       /* Historical */
 562 #elif defined(CONFIG_FSL_DDR2)
 563         wr = (common_dimm->tWR_ps + mclk_ps - 1) / mclk_ps - 1;
 564 #else
 565 #error "Write tWR_auto for DDR3"
 566 #endif
 567         dll_res = 0;
 568         mode = 0;
 569
 570 #if defined(CONFIG_FSL_DDR1)
 571         if (1 <= cas_latency && cas_latency <= 4) {
 572                 unsigned char mode_caslat_table[4] = {
 573                         0x5,    /* 1.5 clocks */
 574                         0x2,    /* 2.0 clocks */
 575                         0x6,    /* 2.5 clocks */
 576                         0x3     /* 3.0 clocks */
 577                 };
 578                 caslat = mode_caslat_table[cas_latency - 1];
 579         } else {
 580                 printf("Warning: unknown cas_latency %d\n", cas_latency);
 581         }
 582 #elif defined(CONFIG_FSL_DDR2)
 583         caslat = cas_latency;
 584 #else
 585 #error "Fix the mode CAS Latency for DDR3"
 586 #endif
 587         bt = 0;
 588
 589         switch (popts->burst_length) {
 590         case 4:
 591                 bl = 2;
 592                 break;
 593         case 8:
 594                 bl = 3;
 595                 break;
 596         default:
 597                 printf("Error: invalid burst length of %u specified. "
 598                         " Defaulting to 4 beats.\n",
 599                         popts->burst_length);
 600                 bl = 2;
 601                 break;
 602         }
 603
 604         sdmode = (0
 605                   | ((mr & 0x3) << 14)
 606                   | ((pd & 0x1) << 12)
 607                   | ((wr & 0x7) << 9)
 608                   | ((dll_res & 0x1) << 8)
 609                   | ((mode & 0x1) << 7)
 610                   | ((caslat & 0x7) << 4)
 611                   | ((bt & 0x1) << 3)
 612                   | ((bl & 0x7) << 0)
 613                   );
 614
 615         ddr->ddr_sdram_mode = (0
 616                                | ((esdmode & 0xFFFF) << 16)
 617                                | ((sdmode & 0xFFFF) << 0)
 618                                );
 619         debug("FSLDDR: ddr_sdram_mode = 0x%08x\n", ddr->ddr_sdram_mode);
 620 }
 621
 622
 623 /* DDR SDRAM Data Initialization (DDR_DATA_INIT) */
 624 static void set_ddr_data_init(fsl_ddr_cfg_regs_t *ddr)
 625 {
 626         unsigned int init_value;        /* Initialization value */
 627
 628         init_value = 0xDEADBEEF;
 629         ddr->ddr_data_init = init_value;
 630 }
 631
 632 /*
 633  * DDR SDRAM Clock Control (DDR_SDRAM_CLK_CNTL)
 634  * The old controller on the 8540/60 doesn't have this register.
 635  * Hope it's OK to set it (to 0) anyway.
 636  */
 637 static void set_ddr_sdram_clk_cntl(fsl_ddr_cfg_regs_t *ddr,
 638                                          const memctl_options_t *popts)
 639 {
 640         unsigned int clk_adjust;        /* Clock adjust */
 641
 642         clk_adjust = popts->clk_adjust;
 643         ddr->ddr_sdram_clk_cntl = (clk_adjust & 0xF) << 23;
 644 }
 645
 646 /* DDR Initialization Address (DDR_INIT_ADDR) */
 647 static void set_ddr_init_addr(fsl_ddr_cfg_regs_t *ddr)
 648 {
 649         unsigned int init_addr = 0;     /* Initialization address */
 650
 651         ddr->ddr_init_addr = init_addr;
 652 }
 653
 654 /* DDR Initialization Address (DDR_INIT_EXT_ADDR) */
 655 static void set_ddr_init_ext_addr(fsl_ddr_cfg_regs_t *ddr)
 656 {
 657         unsigned int uia = 0;   /* Use initialization address */
 658         unsigned int init_ext_addr = 0; /* Initialization address */
 659
 660         ddr->ddr_init_ext_addr = (0
 661                                   | ((uia & 0x1) << 31)
 662                                   | (init_ext_addr & 0xF)
 663                                   );
 664 }
 665
 666 /* DDR SDRAM Timing Configuration 4 (TIMING_CFG_4) */
 667 static void set_timing_cfg_4(fsl_ddr_cfg_regs_t *ddr)
 668 {
 669         unsigned int rwt = 0; /* Read-to-write turnaround for same CS */
 670         unsigned int wrt = 0; /* Write-to-read turnaround for same CS */
 671         unsigned int rrt = 0; /* Read-to-read turnaround for same CS */
 672         unsigned int wwt = 0; /* Write-to-write turnaround for same CS */
 673         unsigned int dll_lock = 0; /* DDR SDRAM DLL Lock Time */
 674
 675         ddr->timing_cfg_4 = (0
 676                              | ((rwt & 0xf) << 28)
 677                              | ((wrt & 0xf) << 24)
 678                              | ((rrt & 0xf) << 20)
 679                              | ((wwt & 0xf) << 16)
 680                              | (dll_lock & 0x3)
 681                              );
 682         debug("FSLDDR: timing_cfg_4 = 0x%08x\n", ddr->timing_cfg_4);
 683 }
 684
 685 /* DDR SDRAM Timing Configuration 5 (TIMING_CFG_5) */
 686 static void set_timing_cfg_5(fsl_ddr_cfg_regs_t *ddr)
 687 {
 688         unsigned int rodt_on = 0;       /* Read to ODT on */
 689         unsigned int rodt_off = 0;      /* Read to ODT off */
 690         unsigned int wodt_on = 0;       /* Write to ODT on */
 691         unsigned int wodt_off = 0;      /* Write to ODT off */
 692
 693         ddr->timing_cfg_5 = (0
 694                              | ((rodt_on & 0xf) << 24)
 695                              | ((rodt_off & 0xf) << 20)
 696                              | ((wodt_on & 0xf) << 12)
 697                              | ((wodt_off & 0xf) << 8)
 698                              );
 699         debug("FSLDDR: timing_cfg_5 = 0x%08x\n", ddr->timing_cfg_5);
 700 }
 701
 702 /* DDR ZQ Calibration Control (DDR_ZQ_CNTL) */
 703 static void set_ddr_zq_cntl(fsl_ddr_cfg_regs_t *ddr)
 704 {
 705         unsigned int zq_en = 0; /* ZQ Calibration Enable */
 706         unsigned int zqinit = 0;/* POR ZQ Calibration Time (tZQinit) */
 707         /* Normal Operation Full Calibration Time (tZQoper) */
 708         unsigned int zqoper = 0;
 709         /* Normal Operation Short Calibration Time (tZQCS) */
 710         unsigned int zqcs = 0;
 711
 712         ddr->ddr_zq_cntl = (0
 713                             | ((zq_en & 0x1) << 31)
 714                             | ((zqinit & 0xF) << 24)
 715                             | ((zqoper & 0xF) << 16)
 716                             | ((zqcs & 0xF) << 8)
 717                             );
 718 }
 719
 720 /* DDR Write Leveling Control (DDR_WRLVL_CNTL) */
 721 static void set_ddr_wrlvl_cntl(fsl_ddr_cfg_regs_t *ddr)
 722 {
 723         unsigned int wrlvl_en = 0; /* Write Leveling Enable */
 724         /*
 725          * First DQS pulse rising edge after margining mode
 726          * is programmed (tWL_MRD)
 727          */
 728         unsigned int wrlvl_mrd = 0;
 729         /* ODT delay after margining mode is programmed (tWL_ODTEN) */
 730         unsigned int wrlvl_odten = 0;
 731         /* DQS/DQS_ delay after margining mode is programmed (tWL_DQSEN) */
 732         unsigned int wrlvl_dqsen = 0;
 733         /* WRLVL_SMPL: Write leveling sample time */
 734         unsigned int wrlvl_smpl = 0;
 735         /* WRLVL_WLR: Write leveling repeition time */
 736         unsigned int wrlvl_wlr = 0;
 737         /* WRLVL_START: Write leveling start time */
 738         unsigned int wrlvl_start = 0;
 739
 740         ddr->ddr_wrlvl_cntl = (0
 741                                | ((wrlvl_en & 0x1) << 31)
 742                                | ((wrlvl_mrd & 0x7) << 24)
 743                                | ((wrlvl_odten & 0x7) << 20)
 744                                | ((wrlvl_dqsen & 0x7) << 16)
 745                                | ((wrlvl_smpl & 0xf) << 12)
 746                                | ((wrlvl_wlr & 0x7) << 8)
 747                                | ((wrlvl_start & 0xF) << 0)
 748                                );
 749 }
 750
 751 /* DDR Self Refresh Counter (DDR_SR_CNTR) */
 752 static void set_ddr_sr_cntr(fsl_ddr_cfg_regs_t *ddr)
 753 {
 754         unsigned int sr_it = 0; /* Self Refresh Idle Threshold */
 755
 756         ddr->ddr_sr_cntr = (sr_it & 0xF) << 16;
 757 }
 758
 759 /* DDR Pre-Drive Conditioning Control (DDR_PD_CNTL) */
 760 static void set_ddr_pd_cntl(fsl_ddr_cfg_regs_t *ddr)
 761 {
 762         /* Termination value during pre-drive conditioning */
 763         unsigned int tvpd = 0;
 764         unsigned int pd_en = 0;         /* Pre-Drive Conditioning Enable */
 765         unsigned int pdar = 0;          /* Pre-Drive After Read */
 766         unsigned int pdaw = 0;          /* Pre-Drive After Write */
 767         unsigned int pd_on = 0;         /* Pre-Drive Conditioning On */
 768         unsigned int pd_off = 0;        /* Pre-Drive Conditioning Off */
 769
 770         ddr->ddr_pd_cntl = (0
 771                             | ((pd_en & 0x1) << 31)
 772                             | ((tvpd & 0x7) << 28)
 773                             | ((pdar & 0x7F) << 20)
 774                             | ((pdaw & 0x7F) << 12)
 775                             | ((pd_on & 0x1F) << 6)
 776                             | ((pd_off & 0x1F) << 0)
 777                             );
 778 }
 779
 780
 781 /* DDR SDRAM Register Control Word 1 (DDR_SDRAM_RCW_1) */
 782 static void set_ddr_sdram_rcw_1(fsl_ddr_cfg_regs_t *ddr)
 783 {
 784         unsigned int rcw0 = 0;  /* RCW0: Register Control Word 0 */
 785         unsigned int rcw1 = 0;  /* RCW1: Register Control Word 1 */
 786         unsigned int rcw2 = 0;  /* RCW2: Register Control Word 2 */
 787         unsigned int rcw3 = 0;  /* RCW3: Register Control Word 3 */
 788         unsigned int rcw4 = 0;  /* RCW4: Register Control Word 4 */
 789         unsigned int rcw5 = 0;  /* RCW5: Register Control Word 5 */
 790         unsigned int rcw6 = 0;  /* RCW6: Register Control Word 6 */
 791         unsigned int rcw7 = 0;  /* RCW7: Register Control Word 7 */
 792
 793         ddr->ddr_sdram_rcw_1 = (0
 794                                 | ((rcw0 & 0xF) << 28)
 795                                 | ((rcw1 & 0xF) << 24)
 796                                 | ((rcw2 & 0xF) << 20)
 797                                 | ((rcw3 & 0xF) << 16)
 798                                 | ((rcw4 & 0xF) << 12)
 799                                 | ((rcw5 & 0xF) << 8)
 800                                 | ((rcw6 & 0xF) << 4)
 801                                 | ((rcw7 & 0xF) << 0)
 802                                 );
 803 }
 804
 805 /* DDR SDRAM Register Control Word 2 (DDR_SDRAM_RCW_2) */
 806 static void set_ddr_sdram_rcw_2(fsl_ddr_cfg_regs_t *ddr)
 807 {
 808         unsigned int rcw8 = 0;  /* RCW0: Register Control Word 8 */
 809         unsigned int rcw9 = 0;  /* RCW1: Register Control Word 9 */
 810         unsigned int rcw10 = 0; /* RCW2: Register Control Word 10 */
 811         unsigned int rcw11 = 0; /* RCW3: Register Control Word 11 */
 812         unsigned int rcw12 = 0; /* RCW4: Register Control Word 12 */
 813         unsigned int rcw13 = 0; /* RCW5: Register Control Word 13 */
 814         unsigned int rcw14 = 0; /* RCW6: Register Control Word 14 */
 815         unsigned int rcw15 = 0; /* RCW7: Register Control Word 15 */
 816
 817         ddr->ddr_sdram_rcw_2 = (0
 818                                 | ((rcw8 & 0xF) << 28)
 819                                 | ((rcw9 & 0xF) << 24)
 820                                 | ((rcw10 & 0xF) << 20)
 821                                 | ((rcw11 & 0xF) << 16)
 822                                 | ((rcw12 & 0xF) << 12)
 823                                 | ((rcw13 & 0xF) << 8)
 824                                 | ((rcw14 & 0xF) << 4)
 825                                 | ((rcw15 & 0xF) << 0)
 826                                 );
 827 }
 828
 829 unsigned int
 830 check_fsl_memctl_config_regs(const fsl_ddr_cfg_regs_t *ddr)
 831 {
 832         unsigned int res = 0;
 833
 834         /*
 835          * Check that DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] are
 836          * not set at the same time.
 837          */
 838         if (ddr->ddr_sdram_cfg & 0x10000000
 839             && ddr->ddr_sdram_cfg & 0x00008000) {
 840                 printf("Error: DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] "
 841                                 " should not be set at the same time.\n");
 842                 res++;
 843         }
 844
 845         return res;
 846 }
 847
 848 unsigned int
 849 compute_fsl_memctl_config_regs(const memctl_options_t *popts,
 850                                fsl_ddr_cfg_regs_t *ddr,
 851                                const common_timing_params_t *common_dimm,
 852                                const dimm_params_t *dimm_params,
 853                                unsigned int dbw_cap_adj)
 854 {
 855         unsigned int i;
 856         unsigned int cas_latency;
 857         unsigned int additive_latency;
 858
 859         memset(ddr, 0, sizeof(fsl_ddr_cfg_regs_t));
 860
 861         if (common_dimm == NULL) {
 862                 printf("Error: subset DIMM params struct null pointer\n");
 863                 return 1;
 864         }
 865
 866         /*
 867          * Process overrides first.
 868          *
 869          * FIXME: somehow add dereated caslat to this
 870          */
 871         cas_latency = (popts->cas_latency_override)
 872                 ? popts->cas_latency_override_value
 873                 : common_dimm->lowest_common_SPD_caslat;
 874
 875         additive_latency = (popts->additive_latency_override)
 876                 ? popts->additive_latency_override_value
 877                 : common_dimm->additive_latency;
 878
 879         /* Chip Select Memory Bounds (CSn_BNDS) */
 880         for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
 881                 phys_size_t sa = 0;
 882                 phys_size_t ea = 0;
 883
 884                 if (popts->ba_intlv_ctl && (i > 0) &&
 885                         ((popts->ba_intlv_ctl & 0x60) != FSL_DDR_CS2_CS3 )) {
 886                         /* Don't set up boundaries for other CS
 887                          * other than CS0, if bank interleaving
 888                          * is enabled and not CS2+CS3 interleaved.
 889                          */
 890                         break;
 891                 }
 892
 893                 if (dimm_params[i/2].n_ranks == 0) {
 894                         debug("Skipping setup of CS%u "
 895                                 "because n_ranks on DIMM %u is 0\n", i, i/2);
 896                         continue;
 897                 }
 898                 if (popts->memctl_interleaving && popts->ba_intlv_ctl) {
 899                         /*
 900                          * This works superbank 2CS
 901                          * There are 2 memory controllers configured
 902                          * identically, memory is interleaved between them,
 903                          * and each controller uses rank interleaving within
 904                          * itself. Therefore the starting and ending address
 905                          * on each controller is twice the amount present on
 906                          * each controller.
 907                          */
 908                         unsigned long long rank_density
 909                                         = dimm_params[0].capacity;
 910                         ea = (2 * (rank_density >> dbw_cap_adj)) - 1;
 911                 }
 912                 else if (!popts->memctl_interleaving && popts->ba_intlv_ctl) {
 913                         /*
 914                          * If memory interleaving between controllers is NOT
 915                          * enabled, the starting address for each memory
 916                          * controller is distinct.  However, because rank
 917                          * interleaving is enabled, the starting and ending
 918                          * addresses of the total memory on that memory
 919                          * controller needs to be programmed into its
 920                          * respective CS0_BNDS.
 921                          */
 922                         unsigned long long rank_density
 923                                                 = dimm_params[i/2].rank_density;
 924                         switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
 925                         case FSL_DDR_CS0_CS1_CS2_CS3:
 926                                 /* CS0+CS1+CS2+CS3 interleaving, only CS0_CNDS
 927                                  * needs to be set.
 928                                  */
 929                                 sa = common_dimm->base_address;
 930                                 ea = sa + (4 * (rank_density >> dbw_cap_adj))-1;
 931                                 break;
 932                         case FSL_DDR_CS0_CS1_AND_CS2_CS3:
 933                                 /* CS0+CS1 and CS2+CS3 interleaving, CS0_CNDS
 934                                  * and CS2_CNDS need to be set.
 935                                  */
 936                                 if (!(i&1)) {
 937                                         sa = dimm_params[i/2].base_address;
 938                                         ea = sa + (i * (rank_density >>
 939                                                 dbw_cap_adj)) - 1;
 940                                 }
 941                                 break;
 942                         case FSL_DDR_CS0_CS1:
 943                                 /* CS0+CS1 interleaving, CS0_CNDS needs
 944                                  * to be set
 945                                  */
 946                                 sa = common_dimm->base_address;
 947                                 ea = sa + (2 * (rank_density >> dbw_cap_adj))-1;
 948                                 break;
 949                         case FSL_DDR_CS2_CS3:
 950                                 /* CS2+CS3 interleaving*/
 951                                 if (i == 2) {
 952                                         sa = dimm_params[i/2].base_address;
 953                                         ea = sa + (2 * (rank_density >>
 954                                                 dbw_cap_adj)) - 1;
 955                                 }
 956                                 break;
 957                         default:  /* No bank(chip-select) interleaving */
 958                                 break;
 959                         }
 960                 }
 961                 else if (popts->memctl_interleaving && !popts->ba_intlv_ctl) {
 962                         /*
 963                          * Only the rank on CS0 of each memory controller may
 964                          * be used if memory controller interleaving is used
 965                          * without rank interleaving within each memory
 966                          * controller.  However, the ending address programmed
 967                          * into each CS0 must be the sum of the amount of
 968                          * memory in the two CS0 ranks.
 969                          */
 970                         if (i == 0) {
 971                                 unsigned long long rank_density
 972                                                 = dimm_params[0].rank_density;
 973                                 ea = (2 * (rank_density >> dbw_cap_adj)) - 1;
 974                         }
 975
 976                 }
 977                 else if (!popts->memctl_interleaving && !popts->ba_intlv_ctl) {
 978                         /*
 979                          * No rank interleaving and no memory controller
 980                          * interleaving.
 981                          */
 982                         unsigned long long rank_density
 983                                                 = dimm_params[i/2].rank_density;
 984                         sa = dimm_params[i/2].base_address;
 985                         ea = sa + (rank_density >> dbw_cap_adj) - 1;
 986                         if (i&1) {
 987                                 if ((dimm_params[i/2].n_ranks == 1)) {
 988                                         /* Odd chip select, single-rank dimm */
 989                                         sa = 0;
 990                                         ea = 0;
 991                                 } else {
 992                                         /* Odd chip select, dual-rank DIMM */
 993                                         sa += rank_density >> dbw_cap_adj;
 994                                         ea += rank_density >> dbw_cap_adj;
 995                                 }
 996                         }
 997                 }
 998
 999                 sa >>= 24;
1000                 ea >>= 24;
1001
1002                 ddr->cs[i].bnds = (0
1003                         | ((sa & 0xFFF) << 16)  /* starting address MSB */
1004                         | ((ea & 0xFFF) << 0)   /* ending address MSB */
1005                         );
1006
1007                 debug("FSLDDR: cs[%d]_bnds = 0x%08x\n", i, ddr->cs[i].bnds);
1008                 set_csn_config(i, ddr, popts, dimm_params);
1009                 set_csn_config_2(i, ddr);
1010         }
1011
1012 #if defined(CONFIG_FSL_DDR2)
1013         set_timing_cfg_0(ddr);
1014 #endif
1015
1016         set_timing_cfg_3(ddr, common_dimm);
1017         set_timing_cfg_1(ddr, common_dimm, cas_latency);
1018         set_timing_cfg_2(ddr, popts, common_dimm,
1019                                 cas_latency, additive_latency);
1020
1021         set_ddr_sdram_cfg(ddr, popts, common_dimm);
1022
1023         set_ddr_sdram_cfg_2(ddr, popts);
1024         set_ddr_sdram_mode(ddr, popts, common_dimm,
1025                                 cas_latency, additive_latency);
1026         set_ddr_sdram_mode_2(ddr);
1027         set_ddr_sdram_interval(ddr, popts, common_dimm);
1028         set_ddr_data_init(ddr);
1029         set_ddr_sdram_clk_cntl(ddr, popts);
1030         set_ddr_init_addr(ddr);
1031         set_ddr_init_ext_addr(ddr);
1032         set_timing_cfg_4(ddr);
1033         set_timing_cfg_5(ddr);
1034
1035         set_ddr_zq_cntl(ddr);
1036         set_ddr_wrlvl_cntl(ddr);
1037
1038         set_ddr_pd_cntl(ddr);
1039         set_ddr_sr_cntr(ddr);
1040
1041         set_ddr_sdram_rcw_1(ddr);
1042         set_ddr_sdram_rcw_2(ddr);
1043
1044         return check_fsl_memctl_config_regs(ddr);
1045 }