git.oblomov.eu Git - linux-2.6/blob - arch/powerpc/boot/prpmc2800.c

   1 /*
   2  * Motorola ECC prpmc280/f101 & prpmc2800/f101e platform code.
   3  *
   4  * Author: Mark A. Greer <mgreer@mvista.com>
   5  *
   6  * 2007 (c) MontaVista, Software, Inc.  This file is licensed under
   7  * the terms of the GNU General Public License version 2.  This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11
  12 #include <stdarg.h>
  13 #include <stddef.h>
  14 #include "types.h"
  15 #include "elf.h"
  16 #include "page.h"
  17 #include "string.h"
  18 #include "stdio.h"
  19 #include "io.h"
  20 #include "ops.h"
  21 #include "gunzip_util.h"
  22 #include "mv64x60.h"
  23
  24 #define KB      1024U
  25 #define MB      (KB*KB)
  26 #define GB      (KB*MB)
  27 #define MHz     (1000U*1000U)
  28 #define GHz     (1000U*MHz)
  29
  30 #define BOARD_MODEL     "PrPMC2800"
  31 #define BOARD_MODEL_MAX 32 /* max strlen(BOARD_MODEL) + 1 */
  32
  33 #define EEPROM2_ADDR    0xa4
  34 #define EEPROM3_ADDR    0xa8
  35
  36 BSS_STACK(16*KB);
  37
  38 static u8 *bridge_base;
  39
  40 typedef enum {
  41         BOARD_MODEL_PRPMC280,
  42         BOARD_MODEL_PRPMC2800,
  43 } prpmc2800_board_model;
  44
  45 typedef enum {
  46         BRIDGE_TYPE_MV64360,
  47         BRIDGE_TYPE_MV64362,
  48 } prpmc2800_bridge_type;
  49
  50 struct prpmc2800_board_info {
  51         prpmc2800_board_model model;
  52         char variant;
  53         prpmc2800_bridge_type bridge_type;
  54         u8 subsys0;
  55         u8 subsys1;
  56         u8 vpd4;
  57         u8 vpd4_mask;
  58         u32 core_speed;
  59         u32 mem_size;
  60         u32 boot_flash;
  61         u32 user_flash;
  62 };
  63
  64 static struct prpmc2800_board_info prpmc2800_board_info[] = {
  65         {
  66                 .model          = BOARD_MODEL_PRPMC280,
  67                 .variant        = 'a',
  68                 .bridge_type    = BRIDGE_TYPE_MV64360,
  69                 .subsys0        = 0xff,
  70                 .subsys1        = 0xff,
  71                 .vpd4           = 0x00,
  72                 .vpd4_mask      = 0x0f,
  73                 .core_speed     = 1*GHz,
  74                 .mem_size       = 512*MB,
  75                 .boot_flash     = 1*MB,
  76                 .user_flash     = 64*MB,
  77         },
  78         {
  79                 .model          = BOARD_MODEL_PRPMC280,
  80                 .variant        = 'b',
  81                 .bridge_type    = BRIDGE_TYPE_MV64362,
  82                 .subsys0        = 0xff,
  83                 .subsys1        = 0xff,
  84                 .vpd4           = 0x01,
  85                 .vpd4_mask      = 0x0f,
  86                 .core_speed     = 1*GHz,
  87                 .mem_size       = 512*MB,
  88                 .boot_flash     = 0,
  89                 .user_flash     = 0,
  90         },
  91         {
  92                 .model          = BOARD_MODEL_PRPMC280,
  93                 .variant        = 'c',
  94                 .bridge_type    = BRIDGE_TYPE_MV64360,
  95                 .subsys0        = 0xff,
  96                 .subsys1        = 0xff,
  97                 .vpd4           = 0x02,
  98                 .vpd4_mask      = 0x0f,
  99                 .core_speed     = 733*MHz,
 100                 .mem_size       = 512*MB,
 101                 .boot_flash     = 1*MB,
 102                 .user_flash     = 64*MB,
 103         },
 104         {
 105                 .model          = BOARD_MODEL_PRPMC280,
 106                 .variant        = 'd',
 107                 .bridge_type    = BRIDGE_TYPE_MV64360,
 108                 .subsys0        = 0xff,
 109                 .subsys1        = 0xff,
 110                 .vpd4           = 0x03,
 111                 .vpd4_mask      = 0x0f,
 112                 .core_speed     = 1*GHz,
 113                 .mem_size       = 1*GB,
 114                 .boot_flash     = 1*MB,
 115                 .user_flash     = 64*MB,
 116         },
 117         {
 118                 .model          = BOARD_MODEL_PRPMC280,
 119                 .variant        = 'e',
 120                 .bridge_type    = BRIDGE_TYPE_MV64360,
 121                 .subsys0        = 0xff,
 122                 .subsys1        = 0xff,
 123                 .vpd4           = 0x04,
 124                 .vpd4_mask      = 0x0f,
 125                 .core_speed     = 1*GHz,
 126                 .mem_size       = 512*MB,
 127                 .boot_flash     = 1*MB,
 128                 .user_flash     = 64*MB,
 129         },
 130         {
 131                 .model          = BOARD_MODEL_PRPMC280,
 132                 .variant        = 'f',
 133                 .bridge_type    = BRIDGE_TYPE_MV64362,
 134                 .subsys0        = 0xff,
 135                 .subsys1        = 0xff,
 136                 .vpd4           = 0x05,
 137                 .vpd4_mask      = 0x0f,
 138                 .core_speed     = 733*MHz,
 139                 .mem_size       = 128*MB,
 140                 .boot_flash     = 1*MB,
 141                 .user_flash     = 0,
 142         },
 143         {
 144                 .model          = BOARD_MODEL_PRPMC280,
 145                 .variant        = 'g',
 146                 .bridge_type    = BRIDGE_TYPE_MV64360,
 147                 .subsys0        = 0xff,
 148                 .subsys1        = 0xff,
 149                 .vpd4           = 0x06,
 150                 .vpd4_mask      = 0x0f,
 151                 .core_speed     = 1*GHz,
 152                 .mem_size       = 256*MB,
 153                 .boot_flash     = 1*MB,
 154                 .user_flash     = 0,
 155         },
 156         {
 157                 .model          = BOARD_MODEL_PRPMC280,
 158                 .variant        = 'h',
 159                 .bridge_type    = BRIDGE_TYPE_MV64360,
 160                 .subsys0        = 0xff,
 161                 .subsys1        = 0xff,
 162                 .vpd4           = 0x07,
 163                 .vpd4_mask      = 0x0f,
 164                 .core_speed     = 1*GHz,
 165                 .mem_size       = 1*GB,
 166                 .boot_flash     = 1*MB,
 167                 .user_flash     = 64*MB,
 168         },
 169         {
 170                 .model          = BOARD_MODEL_PRPMC2800,
 171                 .variant        = 'a',
 172                 .bridge_type    = BRIDGE_TYPE_MV64360,
 173                 .subsys0        = 0xb2,
 174                 .subsys1        = 0x8c,
 175                 .vpd4           = 0x00,
 176                 .vpd4_mask      = 0x00,
 177                 .core_speed     = 1*GHz,
 178                 .mem_size       = 512*MB,
 179                 .boot_flash     = 2*MB,
 180                 .user_flash     = 64*MB,
 181         },
 182         {
 183                 .model          = BOARD_MODEL_PRPMC2800,
 184                 .variant        = 'b',
 185                 .bridge_type    = BRIDGE_TYPE_MV64362,
 186                 .subsys0        = 0xb2,
 187                 .subsys1        = 0x8d,
 188                 .vpd4           = 0x00,
 189                 .vpd4_mask      = 0x00,
 190                 .core_speed     = 1*GHz,
 191                 .mem_size       = 512*MB,
 192                 .boot_flash     = 0,
 193                 .user_flash     = 0,
 194         },
 195         {
 196                 .model          = BOARD_MODEL_PRPMC2800,
 197                 .variant        = 'c',
 198                 .bridge_type    = BRIDGE_TYPE_MV64360,
 199                 .subsys0        = 0xb2,
 200                 .subsys1        = 0x8e,
 201                 .vpd4           = 0x00,
 202                 .vpd4_mask      = 0x00,
 203                 .core_speed     = 733*MHz,
 204                 .mem_size       = 512*MB,
 205                 .boot_flash     = 2*MB,
 206                 .user_flash     = 64*MB,
 207         },
 208         {
 209                 .model          = BOARD_MODEL_PRPMC2800,
 210                 .variant        = 'd',
 211                 .bridge_type    = BRIDGE_TYPE_MV64360,
 212                 .subsys0        = 0xb2,
 213                 .subsys1        = 0x8f,
 214                 .vpd4           = 0x00,
 215                 .vpd4_mask      = 0x00,
 216                 .core_speed     = 1*GHz,
 217                 .mem_size       = 1*GB,
 218                 .boot_flash     = 2*MB,
 219                 .user_flash     = 64*MB,
 220         },
 221         {
 222                 .model          = BOARD_MODEL_PRPMC2800,
 223                 .variant        = 'e',
 224                 .bridge_type    = BRIDGE_TYPE_MV64360,
 225                 .subsys0        = 0xa2,
 226                 .subsys1        = 0x8a,
 227                 .vpd4           = 0x00,
 228                 .vpd4_mask      = 0x00,
 229                 .core_speed     = 1*GHz,
 230                 .mem_size       = 512*MB,
 231                 .boot_flash     = 2*MB,
 232                 .user_flash     = 64*MB,
 233         },
 234         {
 235                 .model          = BOARD_MODEL_PRPMC2800,
 236                 .variant        = 'f',
 237                 .bridge_type    = BRIDGE_TYPE_MV64362,
 238                 .subsys0        = 0xa2,
 239                 .subsys1        = 0x8b,
 240                 .vpd4           = 0x00,
 241                 .vpd4_mask      = 0x00,
 242                 .core_speed     = 733*MHz,
 243                 .mem_size       = 128*MB,
 244                 .boot_flash     = 2*MB,
 245                 .user_flash     = 0,
 246         },
 247         {
 248                 .model          = BOARD_MODEL_PRPMC2800,
 249                 .variant        = 'g',
 250                 .bridge_type    = BRIDGE_TYPE_MV64360,
 251                 .subsys0        = 0xa2,
 252                 .subsys1        = 0x8c,
 253                 .vpd4           = 0x00,
 254                 .vpd4_mask      = 0x00,
 255                 .core_speed     = 1*GHz,
 256                 .mem_size       = 2*GB,
 257                 .boot_flash     = 2*MB,
 258                 .user_flash     = 64*MB,
 259         },
 260         {
 261                 .model          = BOARD_MODEL_PRPMC2800,
 262                 .variant        = 'h',
 263                 .bridge_type    = BRIDGE_TYPE_MV64360,
 264                 .subsys0        = 0xa2,
 265                 .subsys1        = 0x8d,
 266                 .vpd4           = 0x00,
 267                 .vpd4_mask      = 0x00,
 268                 .core_speed     = 733*MHz,
 269                 .mem_size       = 1*GB,
 270                 .boot_flash     = 2*MB,
 271                 .user_flash     = 64*MB,
 272         },
 273 };
 274
 275 static struct prpmc2800_board_info *prpmc2800_get_board_info(u8 *vpd)
 276 {
 277         struct prpmc2800_board_info *bip;
 278         int i;
 279
 280         for (i=0,bip=prpmc2800_board_info; i<ARRAY_SIZE(prpmc2800_board_info);
 281                         i++,bip++)
 282                 if ((vpd[0] == bip->subsys0) && (vpd[1] == bip->subsys1)
 283                                 && ((vpd[4] & bip->vpd4_mask) == bip->vpd4))
 284                         return bip;
 285
 286         return NULL;
 287 }
 288
 289 /* Get VPD from i2c eeprom 2, then match it to a board info entry */
 290 static struct prpmc2800_board_info *prpmc2800_get_bip(void)
 291 {
 292         struct prpmc2800_board_info *bip;
 293         u8 vpd[5];
 294         int rc;
 295
 296         if (mv64x60_i2c_open())
 297                 fatal("Error: Can't open i2c device\n\r");
 298
 299         /* Get VPD from i2c eeprom-2 */
 300         memset(vpd, 0, sizeof(vpd));
 301         rc = mv64x60_i2c_read(EEPROM2_ADDR, vpd, 0x1fde, 2, sizeof(vpd));
 302         if (rc < 0)
 303                 fatal("Error: Couldn't read eeprom2\n\r");
 304         mv64x60_i2c_close();
 305
 306         /* Get board type & related info */
 307         bip = prpmc2800_get_board_info(vpd);
 308         if (bip == NULL) {
 309                 printf("Error: Unsupported board or corrupted VPD:\n\r");
 310                 printf("  0x%x 0x%x 0x%x 0x%x 0x%x\n\r",
 311                                 vpd[0], vpd[1], vpd[2], vpd[3], vpd[4]);
 312                 printf("Using device tree defaults...\n\r");
 313         }
 314
 315         return bip;
 316 }
 317
 318 static void prpmc2800_bridge_setup(u32 mem_size)
 319 {
 320         u32 i, v[12], enables, acc_bits;
 321         u32 pci_base_hi, pci_base_lo, size, buf[2];
 322         unsigned long cpu_base;
 323         int rc;
 324         void *devp;
 325         u8 *bridge_pbase, is_coherent;
 326         struct mv64x60_cpu2pci_win *tbl;
 327
 328         bridge_pbase = mv64x60_get_bridge_pbase();
 329         is_coherent = mv64x60_is_coherent();
 330
 331         if (is_coherent)
 332                 acc_bits = MV64x60_PCI_ACC_CNTL_SNOOP_WB
 333                         | MV64x60_PCI_ACC_CNTL_SWAP_NONE
 334                         | MV64x60_PCI_ACC_CNTL_MBURST_32_BYTES
 335                         | MV64x60_PCI_ACC_CNTL_RDSIZE_32_BYTES;
 336         else
 337                 acc_bits = MV64x60_PCI_ACC_CNTL_SNOOP_NONE
 338                         | MV64x60_PCI_ACC_CNTL_SWAP_NONE
 339                         | MV64x60_PCI_ACC_CNTL_MBURST_128_BYTES
 340                         | MV64x60_PCI_ACC_CNTL_RDSIZE_256_BYTES;
 341
 342         mv64x60_config_ctlr_windows(bridge_base, bridge_pbase, is_coherent);
 343         mv64x60_config_pci_windows(bridge_base, bridge_pbase, 0, 0, mem_size,
 344                         acc_bits);
 345
 346         /* Get the cpu -> pci i/o & mem mappings from the device tree */
 347         devp = finddevice("/mv64x60/pci@80000000");
 348         if (devp == NULL)
 349                 fatal("Error: Missing /mv64x60/pci@80000000"
 350                                 " device tree node\n\r");
 351
 352         rc = getprop(devp, "ranges", v, sizeof(v));
 353         if (rc != sizeof(v))
 354                 fatal("Error: Can't find /mv64x60/pci@80000000/ranges"
 355                                 " property\n\r");
 356
 357         /* Get the cpu -> pci i/o & mem mappings from the device tree */
 358         devp = finddevice("/mv64x60");
 359         if (devp == NULL)
 360                 fatal("Error: Missing /mv64x60 device tree node\n\r");
 361
 362         enables = in_le32((u32 *)(bridge_base + MV64x60_CPU_BAR_ENABLE));
 363         enables |= 0x0007fe00; /* Disable all cpu->pci windows */
 364         out_le32((u32 *)(bridge_base + MV64x60_CPU_BAR_ENABLE), enables);
 365
 366         for (i=0; i<12; i+=6) {
 367                 switch (v[i] & 0xff000000) {
 368                 case 0x01000000: /* PCI I/O Space */
 369                         tbl = mv64x60_cpu2pci_io;
 370                         break;
 371                 case 0x02000000: /* PCI MEM Space */
 372                         tbl = mv64x60_cpu2pci_mem;
 373                         break;
 374                 default:
 375                         continue;
 376                 }
 377
 378                 pci_base_hi = v[i+1];
 379                 pci_base_lo = v[i+2];
 380                 cpu_base = v[i+3];
 381                 size = v[i+5];
 382
 383                 buf[0] = cpu_base;
 384                 buf[1] = size;
 385
 386                 if (!dt_xlate_addr(devp, buf, sizeof(buf), &cpu_base))
 387                         fatal("Error: Can't translate PCI address 0x%x\n\r",
 388                                         (u32)cpu_base);
 389
 390                 mv64x60_config_cpu2pci_window(bridge_base, 0, pci_base_hi,
 391                                 pci_base_lo, cpu_base, size, tbl);
 392         }
 393
 394         enables &= ~0x00000600; /* Enable cpu->pci0 i/o, cpu->pci0 mem0 */
 395         out_le32((u32 *)(bridge_base + MV64x60_CPU_BAR_ENABLE), enables);
 396 }
 397
 398 static void prpmc2800_fixups(void)
 399 {
 400         u32 v[2], l, mem_size;
 401         int rc;
 402         void *devp;
 403         char model[BOARD_MODEL_MAX];
 404         struct prpmc2800_board_info *bip;
 405
 406         bip = prpmc2800_get_bip(); /* Get board info based on VPD */
 407
 408         mem_size = (bip) ? bip->mem_size : mv64x60_get_mem_size(bridge_base);
 409         prpmc2800_bridge_setup(mem_size); /* Do necessary bridge setup */
 410
 411         /* If the VPD doesn't match what we know about, just use the
 412          * defaults already in the device tree.
 413          */
 414         if (!bip)
 415                 return;
 416
 417         /* Know the board type so override device tree defaults */
 418         /* Set /model appropriately */
 419         devp = finddevice("/");
 420         if (devp == NULL)
 421                 fatal("Error: Missing '/' device tree node\n\r");
 422         memset(model, 0, BOARD_MODEL_MAX);
 423         strncpy(model, BOARD_MODEL, BOARD_MODEL_MAX - 2);
 424         l = strlen(model);
 425         if (bip->model == BOARD_MODEL_PRPMC280)
 426                 l--;
 427         model[l++] = bip->variant;
 428         model[l++] = '\0';
 429         setprop(devp, "model", model, l);
 430
 431         /* Set /cpus/PowerPC,7447/clock-frequency */
 432         devp = finddevice("/cpus/PowerPC,7447");
 433         if (devp == NULL)
 434                 fatal("Error: Missing proper /cpus device tree node\n\r");
 435         v[0] = bip->core_speed;
 436         setprop(devp, "clock-frequency", &v[0], sizeof(v[0]));
 437
 438         /* Set /memory/reg size */
 439         devp = finddevice("/memory");
 440         if (devp == NULL)
 441                 fatal("Error: Missing /memory device tree node\n\r");
 442         v[0] = 0;
 443         v[1] = bip->mem_size;
 444         setprop(devp, "reg", v, sizeof(v));
 445
 446         /* Update /mv64x60/model, if this is a mv64362 */
 447         if (bip->bridge_type == BRIDGE_TYPE_MV64362) {
 448                 devp = finddevice("/mv64x60");
 449                 if (devp == NULL)
 450                         fatal("Error: Missing /mv64x60 device tree node\n\r");
 451                 setprop(devp, "model", "mv64362", strlen("mv64362") + 1);
 452         }
 453
 454         /* Set User FLASH size */
 455         devp = finddevice("/mv64x60/flash@a0000000");
 456         if (devp == NULL)
 457                 fatal("Error: Missing User FLASH device tree node\n\r");
 458         rc = getprop(devp, "reg", v, sizeof(v));
 459         if (rc != sizeof(v))
 460                 fatal("Error: Can't find User FLASH reg property\n\r");
 461         v[1] = bip->user_flash;
 462         setprop(devp, "reg", v, sizeof(v));
 463 }
 464
 465 #define MV64x60_MPP_CNTL_0      0xf000
 466 #define MV64x60_MPP_CNTL_2      0xf008
 467 #define MV64x60_GPP_IO_CNTL     0xf100
 468 #define MV64x60_GPP_LEVEL_CNTL  0xf110
 469 #define MV64x60_GPP_VALUE_SET   0xf118
 470
 471 static void prpmc2800_reset(void)
 472 {
 473         u32 temp;
 474
 475         udelay(5000000);
 476
 477         if (bridge_base != 0) {
 478                 temp = in_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_0));
 479                 temp &= 0xFFFF0FFF;
 480                 out_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_0), temp);
 481
 482                 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL));
 483                 temp |= 0x00000004;
 484                 out_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL), temp);
 485
 486                 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL));
 487                 temp |= 0x00000004;
 488                 out_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL), temp);
 489
 490                 temp = in_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_2));
 491                 temp &= 0xFFFF0FFF;
 492                 out_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_2), temp);
 493
 494                 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL));
 495                 temp |= 0x00080000;
 496                 out_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL), temp);
 497
 498                 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL));
 499                 temp |= 0x00080000;
 500                 out_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL), temp);
 501
 502                 out_le32((u32 *)(bridge_base + MV64x60_GPP_VALUE_SET),
 503                                 0x00080004);
 504         }
 505
 506         for (;;);
 507 }
 508
 509 #define HEAP_SIZE       (16*MB)
 510 static struct gunzip_state gzstate;
 511
 512 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 513                    unsigned long r6, unsigned long r7)
 514 {
 515         struct elf_info ei;
 516         char *heap_start, *dtb;
 517         int dt_size = _dtb_end - _dtb_start;
 518         void *vmlinuz_addr = _vmlinux_start;
 519         unsigned long vmlinuz_size = _vmlinux_end - _vmlinux_start;
 520         char elfheader[256];
 521
 522         if (dt_size <= 0) /* No fdt */
 523                 exit();
 524
 525         /*
 526          * Start heap after end of the kernel (after decompressed to
 527          * address 0) or the end of the zImage, whichever is higher.
 528          * That's so things allocated by simple_alloc won't overwrite
 529          * any part of the zImage and the kernel won't overwrite the dtb
 530          * when decompressed & relocated.
 531          */
 532         gunzip_start(&gzstate, vmlinuz_addr, vmlinuz_size);
 533         gunzip_exactly(&gzstate, elfheader, sizeof(elfheader));
 534
 535         if (!parse_elf32(elfheader, &ei))
 536                 exit();
 537
 538         heap_start = (char *)(ei.memsize + ei.elfoffset); /* end of kernel*/
 539         heap_start = max(heap_start, (char *)_end); /* end of zImage */
 540
 541         if ((unsigned)simple_alloc_init(heap_start, HEAP_SIZE, 2*KB, 16)
 542                         > (128*MB))
 543                 exit();
 544
 545         /* Relocate dtb to safe area past end of zImage & kernel */
 546         dtb = malloc(dt_size);
 547         if (!dtb)
 548                 exit();
 549         memmove(dtb, _dtb_start, dt_size);
 550         fdt_init(dtb);
 551
 552         bridge_base = mv64x60_get_bridge_base();
 553
 554         platform_ops.fixups = prpmc2800_fixups;
 555         platform_ops.exit = prpmc2800_reset;
 556
 557         if (serial_console_init() < 0)
 558                 exit();
 559 }
 560
 561 /* _zimage_start called very early--need to turn off external interrupts */
 562 asm ("  .globl _zimage_start\n\
 563         _zimage_start:\n\
 564                 mfmsr   10\n\
 565                 rlwinm  10,10,0,~(1<<15)        /* Clear MSR_EE */\n\
 566                 sync\n\
 567                 mtmsr   10\n\
 568                 isync\n\
 569                 b _zimage_start_lib\n\
 570 ");