board/tqm834x/tqm834x.c

   1 /*
   2  * (C) Copyright 2005
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  *
  23  */
  24
  25 #include <common.h>
  26 #include <ioports.h>
  27 #include <mpc83xx.h>
  28 #include <asm/mpc8349_pci.h>
  29 #include <i2c.h>
  30 #include <spd.h>
  31 #include <miiphy.h>
  32 #include <asm-ppc/mmu.h>
  33 #include <pci.h>
  34
  35 #define IOSYNC                  asm("eieio")
  36 #define ISYNC                   asm("isync")
  37 #define SYNC                    asm("sync")
  38 #define FPW                     FLASH_PORT_WIDTH
  39 #define FPWV                    FLASH_PORT_WIDTHV
  40
  41 #define DDR_MAX_SIZE_PER_CS     0x20000000
  42
  43 #if defined(DDR_CASLAT_20)
  44 #define TIMING_CASLAT           TIMING_CFG1_CASLAT_20
  45 #define MODE_CASLAT             DDR_MODE_CASLAT_20
  46 #else
  47 #define TIMING_CASLAT           TIMING_CFG1_CASLAT_25
  48 #define MODE_CASLAT             DDR_MODE_CASLAT_25
  49 #endif
  50
  51 #define INITIAL_CS_CONFIG       (CSCONFIG_EN | CSCONFIG_ROW_BIT_12 | \
  52                                 CSCONFIG_COL_BIT_9)
  53
  54 /* Global variable used to store detected number of banks */
  55 int tqm834x_num_flash_banks;
  56
  57 /* External definitions */
  58 ulong flash_get_size (ulong base, int banknum);
  59 extern flash_info_t flash_info[];
  60 extern long spd_sdram (void);
  61
  62 /* Local functions */
  63 static int detect_num_flash_banks(void);
  64 static long int get_ddr_bank_size(short cs, volatile long *base);
  65 static void set_cs_bounds(short cs, long base, long size);
  66 static void set_cs_config(short cs, long config);
  67 static void set_ddr_config(void);
  68
  69 /* Local variable */
  70 static volatile immap_t *im = (immap_t *)CFG_IMMRBAR;
  71
  72 /**************************************************************************
  73  * Board initialzation after relocation to RAM. Used to detect the number
  74  * of Flash banks on TQM834x.
  75  */
  76 int board_early_init_r (void) {
  77         /* sanity check, IMMARBAR should be mirrored at offset zero of IMMR */
  78         if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32)im)
  79                 return 0;
  80
  81         /* detect the number of Flash banks */
  82         return detect_num_flash_banks();
  83 }
  84
  85 /**************************************************************************
  86  * DRAM initalization and size detection
  87  */
  88 long int initdram (int board_type)
  89 {
  90         long bank_size;
  91         long size;
  92         int cs;
  93
  94         /* during size detection, set up the max DDRLAW size */
  95         im->sysconf.ddrlaw[0].bar = CFG_DDR_BASE;
  96         im->sysconf.ddrlaw[0].ar = (LAWAR_EN | LAWAR_SIZE_2G);
  97
  98         /* set CS bounds to maximum size */
  99         for(cs = 0; cs < 4; ++cs) {
 100                 set_cs_bounds(cs,
 101                         CFG_DDR_BASE + (cs * DDR_MAX_SIZE_PER_CS),
 102                         DDR_MAX_SIZE_PER_CS);
 103
 104                 set_cs_config(cs, INITIAL_CS_CONFIG);
 105         }
 106
 107         /* configure ddr controller */
 108         set_ddr_config();
 109
 110         udelay(200);
 111
 112         /* enable DDR controller */
 113         im->ddr.sdram_cfg = (SDRAM_CFG_MEM_EN |
 114                 SDRAM_CFG_SREN |
 115                 SDRAM_CFG_SDRAM_TYPE_DDR);
 116         SYNC;
 117
 118         /* size detection */
 119         debug("\n");
 120         size = 0;
 121         for(cs = 0; cs < 4; ++cs) {
 122                 debug("\nDetecting Bank%d\n", cs);
 123
 124                 bank_size = get_ddr_bank_size(cs,
 125                         (volatile long*)(CFG_DDR_BASE + size));
 126                 size += bank_size;
 127
 128                 debug("DDR Bank%d size: %d MiB\n\n", cs, bank_size >> 20);
 129
 130                 /* exit if less than one bank */
 131                 if(size < DDR_MAX_SIZE_PER_CS) break;
 132         }
 133
 134         return size;
 135 }
 136
 137 /**************************************************************************
 138  * checkboard()
 139  */
 140 int checkboard (void)
 141 {
 142         puts("Board: TQM834x\n");
 143
 144 #ifdef CONFIG_PCI
 145         DECLARE_GLOBAL_DATA_PTR;
 146         volatile immap_t * immr;
 147         u32 w, f;
 148
 149         immr = (immap_t *)CFG_IMMRBAR;
 150         if (!(immr->reset.rcwh & RCWH_PCIHOST)) {
 151                 printf("PCI:   NOT in host mode..?!\n");
 152                 return 0;
 153         }
 154
 155         /* get bus width */
 156         w = 32;
 157         if (immr->reset.rcwh & RCWH_PCI64)
 158                 w = 64;
 159
 160         /* get clock */
 161         f = gd->pci_clk;
 162
 163         printf("PCI1:  %d bit, %d MHz\n", w, f / 1000000);
 164 #else
 165         printf("PCI:   disabled\n");
 166 #endif
 167         return 0;
 168 }
 169
 170
 171 /**************************************************************************
 172  *
 173  * Local functions
 174  *
 175  *************************************************************************/
 176
 177 /**************************************************************************
 178  * Detect the number of flash banks (1 or 2). Store it in
 179  * a global variable tqm834x_num_flash_banks.
 180  * Bank detection code based on the Monitor code.
 181  */
 182 static int detect_num_flash_banks(void)
 183 {
 184         typedef unsigned long FLASH_PORT_WIDTH;
 185         typedef volatile unsigned long FLASH_PORT_WIDTHV;
 186         FPWV *bank1_base;
 187         FPWV *bank2_base;
 188         FPW bank1_read;
 189         FPW bank2_read;
 190         ulong bank1_size;
 191         ulong bank2_size;
 192         ulong total_size;
 193
 194         tqm834x_num_flash_banks = 2;    /* assume two banks */
 195
 196         /* Get bank 1 and 2 information */
 197         bank1_size = flash_get_size(CFG_FLASH_BASE, 0);
 198         debug("Bank1 size: %lu\n", bank1_size);
 199         bank2_size = flash_get_size(CFG_FLASH_BASE + bank1_size, 1);
 200         debug("Bank2 size: %lu\n", bank2_size);
 201         total_size = bank1_size + bank2_size;
 202
 203         if (bank2_size > 0) {
 204                 /* Seems like we've got bank 2, but maybe it's mirrored 1 */
 205
 206                 /* Set the base addresses */
 207                 bank1_base = (FPWV *) (CFG_FLASH_BASE);
 208                 bank2_base = (FPWV *) (CFG_FLASH_BASE + bank1_size);
 209
 210                 /* Put bank 2 into CFI command mode and read */
 211                 bank2_base[0x55] = 0x00980098;
 212                 IOSYNC;
 213                 ISYNC;
 214                 bank2_read = bank2_base[0x10];
 215
 216                 /* Read from bank 1 (it's in read mode) */
 217                 bank1_read = bank1_base[0x10];
 218
 219                 /* Reset Flash */
 220                 bank1_base[0] = 0x00F000F0;
 221                 bank2_base[0] = 0x00F000F0;
 222
 223                 if (bank2_read == bank1_read) {
 224                         /*
 225                          * Looks like just one bank, but not sure yet. Let's
 226                          * read from bank 2 in autosoelect mode.
 227                          */
 228                         bank2_base[0x0555] = 0x00AA00AA;
 229                         bank2_base[0x02AA] = 0x00550055;
 230                         bank2_base[0x0555] = 0x00900090;
 231                         IOSYNC;
 232                         ISYNC;
 233                         bank2_read = bank2_base[0x10];
 234
 235                         /* Read from bank 1 (it's in read mode) */
 236                         bank1_read = bank1_base[0x10];
 237
 238                         /* Reset Flash */
 239                         bank1_base[0] = 0x00F000F0;
 240                         bank2_base[0] = 0x00F000F0;
 241
 242                         if (bank2_read == bank1_read) {
 243                                 /*
 244                                  * In both CFI command and autoselect modes,
 245                                  * we got the some data reading from Flash.
 246                                  * There is only one mirrored bank.
 247                                  */
 248                                 tqm834x_num_flash_banks = 1;
 249                                 total_size = bank1_size;
 250                         }
 251                 }
 252         }
 253
 254         debug("Number of flash banks detected: %d\n", tqm834x_num_flash_banks);
 255
 256         /* set OR0 and BR0 */
 257         im->lbus.bank[0].or = CFG_OR_TIMING_FLASH |
 258                 (-(total_size) & OR_GPCM_AM);
 259         im->lbus.bank[0].br = (CFG_FLASH_BASE & BR_BA) |
 260                 (BR_MS_GPCM | BR_PS_32 | BR_V);
 261
 262         return (0);
 263 }
 264
 265 /*************************************************************************
 266  * Detect the size of a ddr bank. Sets CS bounds and CS config accordingly.
 267  */
 268 static long int get_ddr_bank_size(short cs, volatile long *base)
 269 {
 270         /* This array lists all valid DDR SDRAM configurations, with
 271          * Bank sizes in bytes. (Refer to Table 9-27 in the MPC8349E RM).
 272          * The last entry has to to have size equal 0 and is igonred during
 273          * autodection. Bank sizes must be in increasing order of size
 274          */
 275         struct {
 276                 long row;
 277                 long col;
 278                 long size;
 279         } conf[] = {
 280                 {CSCONFIG_ROW_BIT_12,   CSCONFIG_COL_BIT_8,     32 << 20},
 281                 {CSCONFIG_ROW_BIT_12,   CSCONFIG_COL_BIT_9,     64 << 20},
 282                 {CSCONFIG_ROW_BIT_12,   CSCONFIG_COL_BIT_10,    128 << 20},
 283                 {CSCONFIG_ROW_BIT_13,   CSCONFIG_COL_BIT_9,     128 << 20},
 284                 {CSCONFIG_ROW_BIT_13,   CSCONFIG_COL_BIT_10,    256 << 20},
 285                 {CSCONFIG_ROW_BIT_13,   CSCONFIG_COL_BIT_11,    512 << 20},
 286                 {CSCONFIG_ROW_BIT_14,   CSCONFIG_COL_BIT_10,    512 << 20},
 287                 {CSCONFIG_ROW_BIT_14,   CSCONFIG_COL_BIT_11,    1024 << 20},
 288                 {0,                     0,                      0}
 289         };
 290
 291         int i;
 292         int detected;
 293         long size;
 294
 295         detected = -1;
 296         for(i = 0; conf[i].size != 0; ++i) {
 297
 298                 /* set sdram bank configuration */
 299                 set_cs_config(cs, CSCONFIG_EN | conf[i].col | conf[i].row);
 300
 301                 debug("Getting RAM size...\n");
 302                 size = get_ram_size(base, DDR_MAX_SIZE_PER_CS);
 303
 304                 if((size == conf[i].size) && (i == detected + 1))
 305                         detected = i;
 306
 307                 debug("Trying %ld x %ld (%ld MiB) at addr %p, detected: %ld MiB\n",
 308                         conf[i].row,
 309                         conf[i].col,
 310                         conf[i].size >> 20,
 311                         base,
 312                         size >> 20);
 313         }
 314
 315         if(detected == -1){
 316                 /* disable empty cs */
 317                 debug("\nNo valid configurations for CS%d, disabling...\n", cs);
 318                 set_cs_config(cs, 0);
 319                 return 0;
 320         }
 321
 322         debug("\nDetected configuration %ld x %ld (%ld MiB) at addr %p\n",
 323                         conf[detected].row, conf[detected].col, conf[detected].size >> 20, base);
 324
 325         /* configure cs ro detected params */
 326         set_cs_config(cs, CSCONFIG_EN | conf[detected].row |
 327                         conf[detected].col);
 328
 329         set_cs_bounds(cs, (long)base, conf[detected].size);
 330
 331         return(conf[detected].size);
 332 }
 333
 334 /**************************************************************************
 335  * Sets DDR bank CS bounds.
 336  */
 337 static void set_cs_bounds(short cs, long base, long size)
 338 {
 339         debug("Setting bounds %08x, %08x for cs %d\n", base, size, cs);
 340         if(size == 0){
 341                 im->ddr.csbnds[cs].csbnds = 0x00000000;
 342         } else {
 343                 im->ddr.csbnds[cs].csbnds =
 344                         ((base >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
 345                         (((base + size - 1) >> CSBNDS_EA_SHIFT) &
 346                                 CSBNDS_EA);
 347         }
 348         SYNC;
 349 }
 350
 351 /**************************************************************************
 352  * Sets DDR banks CS configuration.
 353  * config == 0x00000000 disables the CS.
 354  */
 355 static void set_cs_config(short cs, long config)
 356 {
 357         debug("Setting config %08x for cs %d\n", config, cs);
 358         im->ddr.cs_config[cs] = config;
 359         SYNC;
 360 }
 361
 362 /**************************************************************************
 363  * Sets DDR clocks, timings and configuration.
 364  */
 365 static void set_ddr_config(void) {
 366         /* clock control */
 367         im->ddr.sdram_clk_cntl = DDR_SDRAM_CLK_CNTL_SS_EN |
 368                 DDR_SDRAM_CLK_CNTL_CLK_ADJUST_05;
 369         SYNC;
 370
 371         /* timing configuration */
 372         im->ddr.timing_cfg_1 =
 373                 (4 << TIMING_CFG1_PRETOACT_SHIFT) |
 374                 (7 << TIMING_CFG1_ACTTOPRE_SHIFT) |
 375                 (4 << TIMING_CFG1_ACTTORW_SHIFT)  |
 376                 (5 << TIMING_CFG1_REFREC_SHIFT)   |
 377                 (3 << TIMING_CFG1_WRREC_SHIFT)    |
 378                 (3 << TIMING_CFG1_ACTTOACT_SHIFT) |
 379                 (1 << TIMING_CFG1_WRTORD_SHIFT)   |
 380                 (TIMING_CFG1_CASLAT & TIMING_CASLAT);
 381
 382         im->ddr.timing_cfg_2 =
 383                 TIMING_CFG2_CPO_DEF |
 384                 (2 << TIMING_CFG2_WR_DATA_DELAY_SHIFT);
 385         SYNC;
 386
 387         /* don't enable DDR controller yet */
 388         im->ddr.sdram_cfg =
 389                 SDRAM_CFG_SREN |
 390                 SDRAM_CFG_SDRAM_TYPE_DDR;
 391         SYNC;
 392
 393         /* Set SDRAM mode */
 394         im->ddr.sdram_mode =
 395                 ((DDR_MODE_EXT_MODEREG | DDR_MODE_WEAK) <<
 396                         SDRAM_MODE_ESD_SHIFT) |
 397                 ((DDR_MODE_MODEREG | DDR_MODE_BLEN_4) <<
 398                         SDRAM_MODE_SD_SHIFT) |
 399                 ((DDR_MODE_CASLAT << SDRAM_MODE_SD_SHIFT) &
 400                         MODE_CASLAT);
 401         SYNC;
 402
 403         /* Set fast SDRAM refresh rate */
 404         im->ddr.sdram_interval =
 405                 (DDR_REFINT_166MHZ_7US << SDRAM_INTERVAL_REFINT_SHIFT) |
 406                 (DDR_BSTOPRE << SDRAM_INTERVAL_BSTOPRE_SHIFT);
 407         SYNC;
 408 }