drivers/ddr/fsl/util.c

   1 /*
   2  * Copyright 2008-2014 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 #include <common.h>
   8 #ifdef CONFIG_PPC
   9 #include <asm/fsl_law.h>
  10 #endif
  11 #include <div64.h>
  12
  13 #include <fsl_ddr.h>
  14 #include <fsl_immap.h>
  15 #include <asm/io.h>
  16 #if defined(CONFIG_FSL_LSCH2) || defined(CONFIG_FSL_LSCH3) || \
  17         defined(CONFIG_ARM)
  18 #include <asm/arch/clock.h>
  19 #endif
  20
  21 /* To avoid 64-bit full-divides, we factor this here */
  22 #define ULL_2E12 2000000000000ULL
  23 #define UL_5POW12 244140625UL
  24 #define UL_2POW13 (1UL << 13)
  25
  26 #define ULL_8FS 0xFFFFFFFFULL
  27
  28 u32 fsl_ddr_get_version(unsigned int ctrl_num)
  29 {
  30         struct ccsr_ddr __iomem *ddr;
  31         u32 ver_major_minor_errata;
  32
  33         switch (ctrl_num) {
  34         case 0:
  35                 ddr = (void *)CONFIG_SYS_FSL_DDR_ADDR;
  36                 break;
  37 #if defined(CONFIG_SYS_FSL_DDR2_ADDR) && (CONFIG_SYS_NUM_DDR_CTLRS > 1)
  38         case 1:
  39                 ddr = (void *)CONFIG_SYS_FSL_DDR2_ADDR;
  40                 break;
  41 #endif
  42 #if defined(CONFIG_SYS_FSL_DDR3_ADDR) && (CONFIG_SYS_NUM_DDR_CTLRS > 2)
  43         case 2:
  44                 ddr = (void *)CONFIG_SYS_FSL_DDR3_ADDR;
  45                 break;
  46 #endif
  47 #if defined(CONFIG_SYS_FSL_DDR4_ADDR) && (CONFIG_SYS_NUM_DDR_CTLRS > 3)
  48         case 3:
  49                 ddr = (void *)CONFIG_SYS_FSL_DDR4_ADDR;
  50                 break;
  51 #endif
  52         default:
  53                 printf("%s unexpected ctrl_num = %u\n", __func__, ctrl_num);
  54                 return 0;
  55         }
  56         ver_major_minor_errata = (ddr_in32(&ddr->ip_rev1) & 0xFFFF) << 8;
  57         ver_major_minor_errata |= (ddr_in32(&ddr->ip_rev2) & 0xFF00) >> 8;
  58
  59         return ver_major_minor_errata;
  60 }
  61
  62 /*
  63  * Round up mclk_ps to nearest 1 ps in memory controller code
  64  * if the error is 0.5ps or more.
  65  *
  66  * If an imprecise data rate is too high due to rounding error
  67  * propagation, compute a suitably rounded mclk_ps to compute
  68  * a working memory controller configuration.
  69  */
  70 unsigned int get_memory_clk_period_ps(const unsigned int ctrl_num)
  71 {
  72         unsigned int data_rate = get_ddr_freq(ctrl_num);
  73         unsigned int result;
  74
  75         /* Round to nearest 10ps, being careful about 64-bit multiply/divide */
  76         unsigned long long rem, mclk_ps = ULL_2E12;
  77
  78         /* Now perform the big divide, the result fits in 32-bits */
  79         rem = do_div(mclk_ps, data_rate);
  80         result = (rem >= (data_rate >> 1)) ? mclk_ps + 1 : mclk_ps;
  81
  82         return result;
  83 }
  84
  85 /* Convert picoseconds into DRAM clock cycles (rounding up if needed). */
  86 unsigned int picos_to_mclk(const unsigned int ctrl_num, unsigned int picos)
  87 {
  88         unsigned long long clks, clks_rem;
  89         unsigned long data_rate = get_ddr_freq(ctrl_num);
  90
  91         /* Short circuit for zero picos */
  92         if (!picos)
  93                 return 0;
  94
  95         /* First multiply the time by the data rate (32x32 => 64) */
  96         clks = picos * (unsigned long long)data_rate;
  97         /*
  98          * Now divide by 5^12 and track the 32-bit remainder, then divide
  99          * by 2*(2^12) using shifts (and updating the remainder).
 100          */
 101         clks_rem = do_div(clks, UL_5POW12);
 102         clks_rem += (clks & (UL_2POW13-1)) * UL_5POW12;
 103         clks >>= 13;
 104
 105         /* If we had a remainder greater than the 1ps error, then round up */
 106         if (clks_rem > data_rate)
 107                 clks++;
 108
 109         /* Clamp to the maximum representable value */
 110         if (clks > ULL_8FS)
 111                 clks = ULL_8FS;
 112         return (unsigned int) clks;
 113 }
 114
 115 unsigned int mclk_to_picos(const unsigned int ctrl_num, unsigned int mclk)
 116 {
 117         return get_memory_clk_period_ps(ctrl_num) * mclk;
 118 }
 119
 120 #ifdef CONFIG_PPC
 121 void
 122 __fsl_ddr_set_lawbar(const common_timing_params_t *memctl_common_params,
 123                            unsigned int law_memctl,
 124                            unsigned int ctrl_num)
 125 {
 126         unsigned long long base = memctl_common_params->base_address;
 127         unsigned long long size = memctl_common_params->total_mem;
 128
 129         /*
 130          * If no DIMMs on this controller, do not proceed any further.
 131          */
 132         if (!memctl_common_params->ndimms_present) {
 133                 return;
 134         }
 135
 136 #if !defined(CONFIG_PHYS_64BIT)
 137         if (base >= CONFIG_MAX_MEM_MAPPED)
 138                 return;
 139         if ((base + size) >= CONFIG_MAX_MEM_MAPPED)
 140                 size = CONFIG_MAX_MEM_MAPPED - base;
 141 #endif
 142         if (set_ddr_laws(base, size, law_memctl) < 0) {
 143                 printf("%s: ERROR (ctrl #%d, TRGT ID=%x)\n", __func__, ctrl_num,
 144                         law_memctl);
 145                 return ;
 146         }
 147         debug("setup ddr law base = 0x%llx, size 0x%llx, TRGT_ID 0x%x\n",
 148                 base, size, law_memctl);
 149 }
 150
 151 __attribute__((weak, alias("__fsl_ddr_set_lawbar"))) void
 152 fsl_ddr_set_lawbar(const common_timing_params_t *memctl_common_params,
 153                          unsigned int memctl_interleaved,
 154                          unsigned int ctrl_num);
 155 #endif
 156
 157 void fsl_ddr_set_intl3r(const unsigned int granule_size)
 158 {
 159 #ifdef CONFIG_E6500
 160         u32 *mcintl3r = (void *) (CONFIG_SYS_IMMR + 0x18004);
 161         *mcintl3r = 0x80000000 | (granule_size & 0x1f);
 162         debug("Enable MCINTL3R with granule size 0x%x\n", granule_size);
 163 #endif
 164 }
 165
 166 u32 fsl_ddr_get_intl3r(void)
 167 {
 168         u32 val = 0;
 169 #ifdef CONFIG_E6500
 170         u32 *mcintl3r = (void *) (CONFIG_SYS_IMMR + 0x18004);
 171         val = *mcintl3r;
 172 #endif
 173         return val;
 174 }
 175
 176 void print_ddr_info(unsigned int start_ctrl)
 177 {
 178         struct ccsr_ddr __iomem *ddr =
 179                 (struct ccsr_ddr __iomem *)(CONFIG_SYS_FSL_DDR_ADDR);
 180
 181 #if     defined(CONFIG_E6500) && (CONFIG_SYS_NUM_DDR_CTLRS == 3)
 182         u32 *mcintl3r = (void *) (CONFIG_SYS_IMMR + 0x18004);
 183 #endif
 184 #if (CONFIG_SYS_NUM_DDR_CTLRS > 1)
 185         uint32_t cs0_config = ddr_in32(&ddr->cs0_config);
 186 #endif
 187         uint32_t sdram_cfg = ddr_in32(&ddr->sdram_cfg);
 188         int cas_lat;
 189
 190 #if CONFIG_SYS_NUM_DDR_CTLRS >= 2
 191         if ((!(sdram_cfg & SDRAM_CFG_MEM_EN)) ||
 192             (start_ctrl == 1)) {
 193                 ddr = (void __iomem *)CONFIG_SYS_FSL_DDR2_ADDR;
 194                 sdram_cfg = ddr_in32(&ddr->sdram_cfg);
 195         }
 196 #endif
 197 #if CONFIG_SYS_NUM_DDR_CTLRS >= 3
 198         if ((!(sdram_cfg & SDRAM_CFG_MEM_EN)) ||
 199             (start_ctrl == 2)) {
 200                 ddr = (void __iomem *)CONFIG_SYS_FSL_DDR3_ADDR;
 201                 sdram_cfg = ddr_in32(&ddr->sdram_cfg);
 202         }
 203 #endif
 204
 205         if (!(sdram_cfg & SDRAM_CFG_MEM_EN)) {
 206                 puts(" (DDR not enabled)\n");
 207                 return;
 208         }
 209
 210         puts(" (DDR");
 211         switch ((sdram_cfg & SDRAM_CFG_SDRAM_TYPE_MASK) >>
 212                 SDRAM_CFG_SDRAM_TYPE_SHIFT) {
 213         case SDRAM_TYPE_DDR1:
 214                 puts("1");
 215                 break;
 216         case SDRAM_TYPE_DDR2:
 217                 puts("2");
 218                 break;
 219         case SDRAM_TYPE_DDR3:
 220                 puts("3");
 221                 break;
 222         case SDRAM_TYPE_DDR4:
 223                 puts("4");
 224                 break;
 225         default:
 226                 puts("?");
 227                 break;
 228         }
 229
 230         if (sdram_cfg & SDRAM_CFG_32_BE)
 231                 puts(", 32-bit");
 232         else if (sdram_cfg & SDRAM_CFG_16_BE)
 233                 puts(", 16-bit");
 234         else
 235                 puts(", 64-bit");
 236
 237         /* Calculate CAS latency based on timing cfg values */
 238         cas_lat = ((ddr_in32(&ddr->timing_cfg_1) >> 16) & 0xf);
 239         if (fsl_ddr_get_version(0) <= 0x40400)
 240                 cas_lat += 1;
 241         else
 242                 cas_lat += 2;
 243         cas_lat += ((ddr_in32(&ddr->timing_cfg_3) >> 12) & 3) << 4;
 244         printf(", CL=%d", cas_lat >> 1);
 245         if (cas_lat & 0x1)
 246                 puts(".5");
 247
 248         if (sdram_cfg & SDRAM_CFG_ECC_EN)
 249                 puts(", ECC on)");
 250         else
 251                 puts(", ECC off)");
 252
 253 #if (CONFIG_SYS_NUM_DDR_CTLRS == 3)
 254 #ifdef CONFIG_E6500
 255         if (*mcintl3r & 0x80000000) {
 256                 puts("\n");
 257                 puts("       DDR Controller Interleaving Mode: ");
 258                 switch (*mcintl3r & 0x1f) {
 259                 case FSL_DDR_3WAY_1KB_INTERLEAVING:
 260                         puts("3-way 1KB");
 261                         break;
 262                 case FSL_DDR_3WAY_4KB_INTERLEAVING:
 263                         puts("3-way 4KB");
 264                         break;
 265                 case FSL_DDR_3WAY_8KB_INTERLEAVING:
 266                         puts("3-way 8KB");
 267                         break;
 268                 default:
 269                         puts("3-way UNKNOWN");
 270                         break;
 271                 }
 272         }
 273 #endif
 274 #endif
 275 #if (CONFIG_SYS_NUM_DDR_CTLRS >= 2)
 276         if ((cs0_config & 0x20000000) && (start_ctrl == 0)) {
 277                 puts("\n");
 278                 puts("       DDR Controller Interleaving Mode: ");
 279
 280                 switch ((cs0_config >> 24) & 0xf) {
 281                 case FSL_DDR_256B_INTERLEAVING:
 282                         puts("256B");
 283                         break;
 284                 case FSL_DDR_CACHE_LINE_INTERLEAVING:
 285                         puts("cache line");
 286                         break;
 287                 case FSL_DDR_PAGE_INTERLEAVING:
 288                         puts("page");
 289                         break;
 290                 case FSL_DDR_BANK_INTERLEAVING:
 291                         puts("bank");
 292                         break;
 293                 case FSL_DDR_SUPERBANK_INTERLEAVING:
 294                         puts("super-bank");
 295                         break;
 296                 default:
 297                         puts("invalid");
 298                         break;
 299                 }
 300         }
 301 #endif
 302
 303         if ((sdram_cfg >> 8) & 0x7f) {
 304                 puts("\n");
 305                 puts("       DDR Chip-Select Interleaving Mode: ");
 306                 switch(sdram_cfg >> 8 & 0x7f) {
 307                 case FSL_DDR_CS0_CS1_CS2_CS3:
 308                         puts("CS0+CS1+CS2+CS3");
 309                         break;
 310                 case FSL_DDR_CS0_CS1:
 311                         puts("CS0+CS1");
 312                         break;
 313                 case FSL_DDR_CS2_CS3:
 314                         puts("CS2+CS3");
 315                         break;
 316                 case FSL_DDR_CS0_CS1_AND_CS2_CS3:
 317                         puts("CS0+CS1 and CS2+CS3");
 318                         break;
 319                 default:
 320                         puts("invalid");
 321                         break;
 322                 }
 323         }
 324 }
 325
 326 void __weak detail_board_ddr_info(void)
 327 {
 328         print_ddr_info(0);
 329 }
 330
 331 void board_add_ram_info(int use_default)
 332 {
 333         detail_board_ddr_info();
 334 }
 335
 336 #ifdef CONFIG_FSL_DDR_SYNC_REFRESH
 337 #define DDRC_DEBUG20_INIT_DONE  0x80000000
 338 #define DDRC_DEBUG2_RF          0x00000040
 339 void fsl_ddr_sync_memctl_refresh(unsigned int first_ctrl,
 340                                  unsigned int last_ctrl)
 341 {
 342         unsigned int i;
 343         u32 ddrc_debug20;
 344         u32 ddrc_debug2[CONFIG_SYS_NUM_DDR_CTLRS] = {};
 345         u32 *ddrc_debug2_p[CONFIG_SYS_NUM_DDR_CTLRS] = {};
 346         struct ccsr_ddr __iomem *ddr;
 347
 348         for (i = first_ctrl; i <= last_ctrl; i++) {
 349                 switch (i) {
 350                 case 0:
 351                         ddr = (void *)CONFIG_SYS_FSL_DDR_ADDR;
 352                         break;
 353 #if defined(CONFIG_SYS_FSL_DDR2_ADDR) && (CONFIG_SYS_NUM_DDR_CTLRS > 1)
 354                 case 1:
 355                         ddr = (void *)CONFIG_SYS_FSL_DDR2_ADDR;
 356                         break;
 357 #endif
 358 #if defined(CONFIG_SYS_FSL_DDR3_ADDR) && (CONFIG_SYS_NUM_DDR_CTLRS > 2)
 359                 case 2:
 360                         ddr = (void *)CONFIG_SYS_FSL_DDR3_ADDR;
 361                         break;
 362 #endif
 363 #if defined(CONFIG_SYS_FSL_DDR4_ADDR) && (CONFIG_SYS_NUM_DDR_CTLRS > 3)
 364                 case 3:
 365                         ddr = (void *)CONFIG_SYS_FSL_DDR4_ADDR;
 366                         break;
 367 #endif
 368                 default:
 369                         printf("%s unexpected ctrl = %u\n", __func__, i);
 370                         return;
 371                 }
 372                 ddrc_debug20 = ddr_in32(&ddr->debug[19]);
 373                 ddrc_debug2_p[i] = &ddr->debug[1];
 374                 while (!(ddrc_debug20 & DDRC_DEBUG20_INIT_DONE)) {
 375                         /* keep polling until DDRC init is done */
 376                         udelay(100);
 377                         ddrc_debug20 = ddr_in32(&ddr->debug[19]);
 378                 }
 379                 ddrc_debug2[i] = ddr_in32(&ddr->debug[1]) | DDRC_DEBUG2_RF;
 380         }
 381         /*
 382          * Sync refresh
 383          * This is put together to make sure the refresh reqeusts are sent
 384          * closely to each other.
 385          */
 386         for (i = first_ctrl; i <= last_ctrl; i++)
 387                 ddr_out32(ddrc_debug2_p[i], ddrc_debug2[i]);
 388 }
 389 #endif /* CONFIG_FSL_DDR_SYNC_REFRESH */
 390
 391 void remove_unused_controllers(fsl_ddr_info_t *info)
 392 {
 393 #ifdef CONFIG_FSL_LSCH3
 394         int i;
 395         u64 nodeid;
 396         void *hnf_sam_ctrl = (void *)(CCI_HN_F_0_BASE + CCN_HN_F_SAM_CTL);
 397         bool ddr0_used = false;
 398         bool ddr1_used = false;
 399
 400         for (i = 0; i < 8; i++) {
 401                 nodeid = in_le64(hnf_sam_ctrl) & CCN_HN_F_SAM_NODEID_MASK;
 402                 if (nodeid == CCN_HN_F_SAM_NODEID_DDR0) {
 403                         ddr0_used = true;
 404                 } else if (nodeid == CCN_HN_F_SAM_NODEID_DDR1) {
 405                         ddr1_used = true;
 406                 } else {
 407                         printf("Unknown nodeid in HN-F SAM control: 0x%llx\n",
 408                                nodeid);
 409                 }
 410                 hnf_sam_ctrl += (CCI_HN_F_1_BASE - CCI_HN_F_0_BASE);
 411         }
 412         if (!ddr0_used && !ddr1_used) {
 413                 printf("Invalid configuration in HN-F SAM control\n");
 414                 return;
 415         }
 416
 417         if (!ddr0_used && info->first_ctrl == 0) {
 418                 info->first_ctrl = 1;
 419                 info->num_ctrls = 1;
 420                 debug("First DDR controller disabled\n");
 421                 return;
 422         }
 423
 424         if (!ddr1_used && info->first_ctrl + info->num_ctrls > 1) {
 425                 info->num_ctrls = 1;
 426                 debug("Second DDR controller disabled\n");
 427         }
 428 #endif
 429 }