drivers/ddr/fsl/util.c

   1 /*
   2  * Copyright 2008-2014 Freescale Semiconductor, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * Version 2 as published by the Free Software Foundation.
   7  */
   8
   9 #include <common.h>
  10 #ifdef CONFIG_PPC
  11 #include <asm/fsl_law.h>
  12 #endif
  13 #include <div64.h>
  14
  15 #include <fsl_ddr.h>
  16 #include <fsl_immap.h>
  17 #include <asm/io.h>
  18
  19 /* To avoid 64-bit full-divides, we factor this here */
  20 #define ULL_2E12 2000000000000ULL
  21 #define UL_5POW12 244140625UL
  22 #define UL_2POW13 (1UL << 13)
  23
  24 #define ULL_8FS 0xFFFFFFFFULL
  25
  26 u32 fsl_ddr_get_version(void)
  27 {
  28         struct ccsr_ddr __iomem *ddr;
  29         u32 ver_major_minor_errata;
  30
  31         ddr = (void *)_DDR_ADDR;
  32         ver_major_minor_errata = (ddr_in32(&ddr->ip_rev1) & 0xFFFF) << 8;
  33         ver_major_minor_errata |= (ddr_in32(&ddr->ip_rev2) & 0xFF00) >> 8;
  34
  35         return ver_major_minor_errata;
  36 }
  37
  38 /*
  39  * Round up mclk_ps to nearest 1 ps in memory controller code
  40  * if the error is 0.5ps or more.
  41  *
  42  * If an imprecise data rate is too high due to rounding error
  43  * propagation, compute a suitably rounded mclk_ps to compute
  44  * a working memory controller configuration.
  45  */
  46 unsigned int get_memory_clk_period_ps(void)
  47 {
  48         unsigned int data_rate = get_ddr_freq(0);
  49         unsigned int result;
  50
  51         /* Round to nearest 10ps, being careful about 64-bit multiply/divide */
  52         unsigned long long rem, mclk_ps = ULL_2E12;
  53
  54         /* Now perform the big divide, the result fits in 32-bits */
  55         rem = do_div(mclk_ps, data_rate);
  56         result = (rem >= (data_rate >> 1)) ? mclk_ps + 1 : mclk_ps;
  57
  58         return result;
  59 }
  60
  61 /* Convert picoseconds into DRAM clock cycles (rounding up if needed). */
  62 unsigned int picos_to_mclk(unsigned int picos)
  63 {
  64         unsigned long long clks, clks_rem;
  65         unsigned long data_rate = get_ddr_freq(0);
  66
  67         /* Short circuit for zero picos */
  68         if (!picos)
  69                 return 0;
  70
  71         /* First multiply the time by the data rate (32x32 => 64) */
  72         clks = picos * (unsigned long long)data_rate;
  73         /*
  74          * Now divide by 5^12 and track the 32-bit remainder, then divide
  75          * by 2*(2^12) using shifts (and updating the remainder).
  76          */
  77         clks_rem = do_div(clks, UL_5POW12);
  78         clks_rem += (clks & (UL_2POW13-1)) * UL_5POW12;
  79         clks >>= 13;
  80
  81         /* If we had a remainder greater than the 1ps error, then round up */
  82         if (clks_rem > data_rate)
  83                 clks++;
  84
  85         /* Clamp to the maximum representable value */
  86         if (clks > ULL_8FS)
  87                 clks = ULL_8FS;
  88         return (unsigned int) clks;
  89 }
  90
  91 unsigned int mclk_to_picos(unsigned int mclk)
  92 {
  93         return get_memory_clk_period_ps() * mclk;
  94 }
  95
  96 #ifdef CONFIG_PPC
  97 void
  98 __fsl_ddr_set_lawbar(const common_timing_params_t *memctl_common_params,
  99                            unsigned int law_memctl,
 100                            unsigned int ctrl_num)
 101 {
 102         unsigned long long base = memctl_common_params->base_address;
 103         unsigned long long size = memctl_common_params->total_mem;
 104
 105         /*
 106          * If no DIMMs on this controller, do not proceed any further.
 107          */
 108         if (!memctl_common_params->ndimms_present) {
 109                 return;
 110         }
 111
 112 #if !defined(CONFIG_PHYS_64BIT)
 113         if (base >= CONFIG_MAX_MEM_MAPPED)
 114                 return;
 115         if ((base + size) >= CONFIG_MAX_MEM_MAPPED)
 116                 size = CONFIG_MAX_MEM_MAPPED - base;
 117 #endif
 118         if (set_ddr_laws(base, size, law_memctl) < 0) {
 119                 printf("%s: ERROR (ctrl #%d, TRGT ID=%x)\n", __func__, ctrl_num,
 120                         law_memctl);
 121                 return ;
 122         }
 123         debug("setup ddr law base = 0x%llx, size 0x%llx, TRGT_ID 0x%x\n",
 124                 base, size, law_memctl);
 125 }
 126
 127 __attribute__((weak, alias("__fsl_ddr_set_lawbar"))) void
 128 fsl_ddr_set_lawbar(const common_timing_params_t *memctl_common_params,
 129                          unsigned int memctl_interleaved,
 130                          unsigned int ctrl_num);
 131 #endif
 132
 133 void fsl_ddr_set_intl3r(const unsigned int granule_size)
 134 {
 135 #ifdef CONFIG_E6500
 136         u32 *mcintl3r = (void *) (CONFIG_SYS_IMMR + 0x18004);
 137         *mcintl3r = 0x80000000 | (granule_size & 0x1f);
 138         debug("Enable MCINTL3R with granule size 0x%x\n", granule_size);
 139 #endif
 140 }
 141
 142 u32 fsl_ddr_get_intl3r(void)
 143 {
 144         u32 val = 0;
 145 #ifdef CONFIG_E6500
 146         u32 *mcintl3r = (void *) (CONFIG_SYS_IMMR + 0x18004);
 147         val = *mcintl3r;
 148 #endif
 149         return val;
 150 }
 151
 152 void print_ddr_info(unsigned int start_ctrl)
 153 {
 154         struct ccsr_ddr __iomem *ddr =
 155                 (struct ccsr_ddr __iomem *)(CONFIG_SYS_FSL_DDR_ADDR);
 156
 157 #if     defined(CONFIG_E6500) && (CONFIG_NUM_DDR_CONTROLLERS == 3)
 158         u32 *mcintl3r = (void *) (CONFIG_SYS_IMMR + 0x18004);
 159 #endif
 160 #if (CONFIG_NUM_DDR_CONTROLLERS > 1)
 161         uint32_t cs0_config = ddr_in32(&ddr->cs0_config);
 162 #endif
 163         uint32_t sdram_cfg = ddr_in32(&ddr->sdram_cfg);
 164         int cas_lat;
 165
 166 #if CONFIG_NUM_DDR_CONTROLLERS >= 2
 167         if ((!(sdram_cfg & SDRAM_CFG_MEM_EN)) ||
 168             (start_ctrl == 1)) {
 169                 ddr = (void __iomem *)CONFIG_SYS_FSL_DDR2_ADDR;
 170                 sdram_cfg = ddr_in32(&ddr->sdram_cfg);
 171         }
 172 #endif
 173 #if CONFIG_NUM_DDR_CONTROLLERS >= 3
 174         if ((!(sdram_cfg & SDRAM_CFG_MEM_EN)) ||
 175             (start_ctrl == 2)) {
 176                 ddr = (void __iomem *)CONFIG_SYS_FSL_DDR3_ADDR;
 177                 sdram_cfg = ddr_in32(&ddr->sdram_cfg);
 178         }
 179 #endif
 180
 181         if (!(sdram_cfg & SDRAM_CFG_MEM_EN)) {
 182                 puts(" (DDR not enabled)\n");
 183                 return;
 184         }
 185
 186         puts(" (DDR");
 187         switch ((sdram_cfg & SDRAM_CFG_SDRAM_TYPE_MASK) >>
 188                 SDRAM_CFG_SDRAM_TYPE_SHIFT) {
 189         case SDRAM_TYPE_DDR1:
 190                 puts("1");
 191                 break;
 192         case SDRAM_TYPE_DDR2:
 193                 puts("2");
 194                 break;
 195         case SDRAM_TYPE_DDR3:
 196                 puts("3");
 197                 break;
 198         case SDRAM_TYPE_DDR4:
 199                 puts("4");
 200                 break;
 201         default:
 202                 puts("?");
 203                 break;
 204         }
 205
 206         if (sdram_cfg & SDRAM_CFG_32_BE)
 207                 puts(", 32-bit");
 208         else if (sdram_cfg & SDRAM_CFG_16_BE)
 209                 puts(", 16-bit");
 210         else
 211                 puts(", 64-bit");
 212
 213         /* Calculate CAS latency based on timing cfg values */
 214         cas_lat = ((ddr_in32(&ddr->timing_cfg_1) >> 16) & 0xf);
 215         if (fsl_ddr_get_version() <= 0x40400)
 216                 cas_lat += 1;
 217         else
 218                 cas_lat += 2;
 219         cas_lat += ((ddr_in32(&ddr->timing_cfg_3) >> 12) & 3) << 4;
 220         printf(", CL=%d", cas_lat >> 1);
 221         if (cas_lat & 0x1)
 222                 puts(".5");
 223
 224         if (sdram_cfg & SDRAM_CFG_ECC_EN)
 225                 puts(", ECC on)");
 226         else
 227                 puts(", ECC off)");
 228
 229 #if (CONFIG_NUM_DDR_CONTROLLERS == 3)
 230 #ifdef CONFIG_E6500
 231         if (*mcintl3r & 0x80000000) {
 232                 puts("\n");
 233                 puts("       DDR Controller Interleaving Mode: ");
 234                 switch (*mcintl3r & 0x1f) {
 235                 case FSL_DDR_3WAY_1KB_INTERLEAVING:
 236                         puts("3-way 1KB");
 237                         break;
 238                 case FSL_DDR_3WAY_4KB_INTERLEAVING:
 239                         puts("3-way 4KB");
 240                         break;
 241                 case FSL_DDR_3WAY_8KB_INTERLEAVING:
 242                         puts("3-way 8KB");
 243                         break;
 244                 default:
 245                         puts("3-way UNKNOWN");
 246                         break;
 247                 }
 248         }
 249 #endif
 250 #endif
 251 #if (CONFIG_NUM_DDR_CONTROLLERS >= 2)
 252         if ((cs0_config & 0x20000000) && (start_ctrl == 0)) {
 253                 puts("\n");
 254                 puts("       DDR Controller Interleaving Mode: ");
 255
 256                 switch ((cs0_config >> 24) & 0xf) {
 257                 case FSL_DDR_256B_INTERLEAVING:
 258                         puts("256B");
 259                         break;
 260                 case FSL_DDR_CACHE_LINE_INTERLEAVING:
 261                         puts("cache line");
 262                         break;
 263                 case FSL_DDR_PAGE_INTERLEAVING:
 264                         puts("page");
 265                         break;
 266                 case FSL_DDR_BANK_INTERLEAVING:
 267                         puts("bank");
 268                         break;
 269                 case FSL_DDR_SUPERBANK_INTERLEAVING:
 270                         puts("super-bank");
 271                         break;
 272                 default:
 273                         puts("invalid");
 274                         break;
 275                 }
 276         }
 277 #endif
 278
 279         if ((sdram_cfg >> 8) & 0x7f) {
 280                 puts("\n");
 281                 puts("       DDR Chip-Select Interleaving Mode: ");
 282                 switch(sdram_cfg >> 8 & 0x7f) {
 283                 case FSL_DDR_CS0_CS1_CS2_CS3:
 284                         puts("CS0+CS1+CS2+CS3");
 285                         break;
 286                 case FSL_DDR_CS0_CS1:
 287                         puts("CS0+CS1");
 288                         break;
 289                 case FSL_DDR_CS2_CS3:
 290                         puts("CS2+CS3");
 291                         break;
 292                 case FSL_DDR_CS0_CS1_AND_CS2_CS3:
 293                         puts("CS0+CS1 and CS2+CS3");
 294                         break;
 295                 default:
 296                         puts("invalid");
 297                         break;
 298                 }
 299         }
 300 }
 301
 302 void __weak detail_board_ddr_info(void)
 303 {
 304         print_ddr_info(0);
 305 }
 306
 307 void board_add_ram_info(int use_default)
 308 {
 309         detail_board_ddr_info();
 310 }