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 extern char _end[];
  25 extern char _vmlinux_start[], _vmlinux_end[];
  26 extern char _dtb_start[], _dtb_end[];
  27
  28 extern void udelay(long delay);
  29
  30 #define KB      1024U
  31 #define MB      (KB*KB)
  32 #define GB      (KB*MB)
  33 #define MHz     (1000U*1000U)
  34 #define GHz     (1000U*MHz)
  35
  36 #define BOARD_MODEL     "PrPMC2800"
  37 #define BOARD_MODEL_MAX 32 /* max strlen(BOARD_MODEL) + 1 */
  38
  39 #define EEPROM2_ADDR    0xa4
  40 #define EEPROM3_ADDR    0xa8
  41
  42 BSS_STACK(16*KB);
  43
  44 static u8 *bridge_base;
  45
  46 typedef enum {
  47         BOARD_MODEL_PRPMC280,
  48         BOARD_MODEL_PRPMC2800,
  49 } prpmc2800_board_model;
  50
  51 typedef enum {
  52         BRIDGE_TYPE_MV64360,
  53         BRIDGE_TYPE_MV64362,
  54 } prpmc2800_bridge_type;
  55
  56 struct prpmc2800_board_info {
  57         prpmc2800_board_model model;
  58         char variant;
  59         prpmc2800_bridge_type bridge_type;
  60         u8 subsys0;
  61         u8 subsys1;
  62         u8 vpd4;
  63         u8 vpd4_mask;
  64         u32 core_speed;
  65         u32 mem_size;
  66         u32 boot_flash;
  67         u32 user_flash;
  68 };
  69
  70 static struct prpmc2800_board_info prpmc2800_board_info[] = {
  71         {
  72                 .model          = BOARD_MODEL_PRPMC280,
  73                 .variant        = 'a',
  74                 .bridge_type    = BRIDGE_TYPE_MV64360,
  75                 .subsys0        = 0xff,
  76                 .subsys1        = 0xff,
  77                 .vpd4           = 0x00,
  78                 .vpd4_mask      = 0x0f,
  79                 .core_speed     = 1*GHz,
  80                 .mem_size       = 512*MB,
  81                 .boot_flash     = 1*MB,
  82                 .user_flash     = 64*MB,
  83         },
  84         {
  85                 .model          = BOARD_MODEL_PRPMC280,
  86                 .variant        = 'b',
  87                 .bridge_type    = BRIDGE_TYPE_MV64362,
  88                 .subsys0        = 0xff,
  89                 .subsys1        = 0xff,
  90                 .vpd4           = 0x01,
  91                 .vpd4_mask      = 0x0f,
  92                 .core_speed     = 1*GHz,
  93                 .mem_size       = 512*MB,
  94                 .boot_flash     = 0,
  95                 .user_flash     = 0,
  96         },
  97         {
  98                 .model          = BOARD_MODEL_PRPMC280,
  99                 .variant        = 'c',
 100                 .bridge_type    = BRIDGE_TYPE_MV64360,
 101                 .subsys0        = 0xff,
 102                 .subsys1        = 0xff,
 103                 .vpd4           = 0x02,
 104                 .vpd4_mask      = 0x0f,
 105                 .core_speed     = 733*MHz,
 106                 .mem_size       = 512*MB,
 107                 .boot_flash     = 1*MB,
 108                 .user_flash     = 64*MB,
 109         },
 110         {
 111                 .model          = BOARD_MODEL_PRPMC280,
 112                 .variant        = 'd',
 113                 .bridge_type    = BRIDGE_TYPE_MV64360,
 114                 .subsys0        = 0xff,
 115                 .subsys1        = 0xff,
 116                 .vpd4           = 0x03,
 117                 .vpd4_mask      = 0x0f,
 118                 .core_speed     = 1*GHz,
 119                 .mem_size       = 1*GB,
 120                 .boot_flash     = 1*MB,
 121                 .user_flash     = 64*MB,
 122         },
 123         {
 124                 .model          = BOARD_MODEL_PRPMC280,
 125                 .variant        = 'e',
 126                 .bridge_type    = BRIDGE_TYPE_MV64360,
 127                 .subsys0        = 0xff,
 128                 .subsys1        = 0xff,
 129                 .vpd4           = 0x04,
 130                 .vpd4_mask      = 0x0f,
 131                 .core_speed     = 1*GHz,
 132                 .mem_size       = 512*MB,
 133                 .boot_flash     = 1*MB,
 134                 .user_flash     = 64*MB,
 135         },
 136         {
 137                 .model          = BOARD_MODEL_PRPMC280,
 138                 .variant        = 'f',
 139                 .bridge_type    = BRIDGE_TYPE_MV64362,
 140                 .subsys0        = 0xff,
 141                 .subsys1        = 0xff,
 142                 .vpd4           = 0x05,
 143                 .vpd4_mask      = 0x0f,
 144                 .core_speed     = 733*MHz,
 145                 .mem_size       = 128*MB,
 146                 .boot_flash     = 1*MB,
 147                 .user_flash     = 0,
 148         },
 149         {
 150                 .model          = BOARD_MODEL_PRPMC280,
 151                 .variant        = 'g',
 152                 .bridge_type    = BRIDGE_TYPE_MV64360,
 153                 .subsys0        = 0xff,
 154                 .subsys1        = 0xff,
 155                 .vpd4           = 0x06,
 156                 .vpd4_mask      = 0x0f,
 157                 .core_speed     = 1*GHz,
 158                 .mem_size       = 256*MB,
 159                 .boot_flash     = 1*MB,
 160                 .user_flash     = 0,
 161         },
 162         {
 163                 .model          = BOARD_MODEL_PRPMC280,
 164                 .variant        = 'h',
 165                 .bridge_type    = BRIDGE_TYPE_MV64360,
 166                 .subsys0        = 0xff,
 167                 .subsys1        = 0xff,
 168                 .vpd4           = 0x07,
 169                 .vpd4_mask      = 0x0f,
 170                 .core_speed     = 1*GHz,
 171                 .mem_size       = 1*GB,
 172                 .boot_flash     = 1*MB,
 173                 .user_flash     = 64*MB,
 174         },
 175         {
 176                 .model          = BOARD_MODEL_PRPMC2800,
 177                 .variant        = 'a',
 178                 .bridge_type    = BRIDGE_TYPE_MV64360,
 179                 .subsys0        = 0xb2,
 180                 .subsys1        = 0x8c,
 181                 .vpd4           = 0x00,
 182                 .vpd4_mask      = 0x00,
 183                 .core_speed     = 1*GHz,
 184                 .mem_size       = 512*MB,
 185                 .boot_flash     = 2*MB,
 186                 .user_flash     = 64*MB,
 187         },
 188         {
 189                 .model          = BOARD_MODEL_PRPMC2800,
 190                 .variant        = 'b',
 191                 .bridge_type    = BRIDGE_TYPE_MV64362,
 192                 .subsys0        = 0xb2,
 193                 .subsys1        = 0x8d,
 194                 .vpd4           = 0x00,
 195                 .vpd4_mask      = 0x00,
 196                 .core_speed     = 1*GHz,
 197                 .mem_size       = 512*MB,
 198                 .boot_flash     = 0,
 199                 .user_flash     = 0,
 200         },
 201         {
 202                 .model          = BOARD_MODEL_PRPMC2800,
 203                 .variant        = 'c',
 204                 .bridge_type    = BRIDGE_TYPE_MV64360,
 205                 .subsys0        = 0xb2,
 206                 .subsys1        = 0x8e,
 207                 .vpd4           = 0x00,
 208                 .vpd4_mask      = 0x00,
 209                 .core_speed     = 733*MHz,
 210                 .mem_size       = 512*MB,
 211                 .boot_flash     = 2*MB,
 212                 .user_flash     = 64*MB,
 213         },
 214         {
 215                 .model          = BOARD_MODEL_PRPMC2800,
 216                 .variant        = 'd',
 217                 .bridge_type    = BRIDGE_TYPE_MV64360,
 218                 .subsys0        = 0xb2,
 219                 .subsys1        = 0x8f,
 220                 .vpd4           = 0x00,
 221                 .vpd4_mask      = 0x00,
 222                 .core_speed     = 1*GHz,
 223                 .mem_size       = 1*GB,
 224                 .boot_flash     = 2*MB,
 225                 .user_flash     = 64*MB,
 226         },
 227         {
 228                 .model          = BOARD_MODEL_PRPMC2800,
 229                 .variant        = 'e',
 230                 .bridge_type    = BRIDGE_TYPE_MV64360,
 231                 .subsys0        = 0xa2,
 232                 .subsys1        = 0x8a,
 233                 .vpd4           = 0x00,
 234                 .vpd4_mask      = 0x00,
 235                 .core_speed     = 1*GHz,
 236                 .mem_size       = 512*MB,
 237                 .boot_flash     = 2*MB,
 238                 .user_flash     = 64*MB,
 239         },
 240         {
 241                 .model          = BOARD_MODEL_PRPMC2800,
 242                 .variant        = 'f',
 243                 .bridge_type    = BRIDGE_TYPE_MV64362,
 244                 .subsys0        = 0xa2,
 245                 .subsys1        = 0x8b,
 246                 .vpd4           = 0x00,
 247                 .vpd4_mask      = 0x00,
 248                 .core_speed     = 733*MHz,
 249                 .mem_size       = 128*MB,
 250                 .boot_flash     = 2*MB,
 251                 .user_flash     = 0,
 252         },
 253         {
 254                 .model          = BOARD_MODEL_PRPMC2800,
 255                 .variant        = 'g',
 256                 .bridge_type    = BRIDGE_TYPE_MV64360,
 257                 .subsys0        = 0xa2,
 258                 .subsys1        = 0x8c,
 259                 .vpd4           = 0x00,
 260                 .vpd4_mask      = 0x00,
 261                 .core_speed     = 1*GHz,
 262                 .mem_size       = 2*GB,
 263                 .boot_flash     = 2*MB,
 264                 .user_flash     = 64*MB,
 265         },
 266         {
 267                 .model          = BOARD_MODEL_PRPMC2800,
 268                 .variant        = 'h',
 269                 .bridge_type    = BRIDGE_TYPE_MV64360,
 270                 .subsys0        = 0xa2,
 271                 .subsys1        = 0x8d,
 272                 .vpd4           = 0x00,
 273                 .vpd4_mask      = 0x00,
 274                 .core_speed     = 733*MHz,
 275                 .mem_size       = 1*GB,
 276                 .boot_flash     = 2*MB,
 277                 .user_flash     = 64*MB,
 278         },
 279 };
 280
 281 static struct prpmc2800_board_info *prpmc2800_get_board_info(u8 *vpd)
 282 {
 283         struct prpmc2800_board_info *bip;
 284         int i;
 285
 286         for (i=0,bip=prpmc2800_board_info; i<ARRAY_SIZE(prpmc2800_board_info);
 287                         i++,bip++)
 288                 if ((vpd[0] == bip->subsys0) && (vpd[1] == bip->subsys1)
 289                                 && ((vpd[4] & bip->vpd4_mask) == bip->vpd4))
 290                         return bip;
 291
 292         return NULL;
 293 }
 294
 295 /* Get VPD from i2c eeprom 2, then match it to a board info entry */
 296 static struct prpmc2800_board_info *prpmc2800_get_bip(void)
 297 {
 298         struct prpmc2800_board_info *bip;
 299         u8 vpd[5];
 300         int rc;
 301
 302         if (mv64x60_i2c_open())
 303                 fatal("Error: Can't open i2c device\n\r");
 304
 305         /* Get VPD from i2c eeprom-2 */
 306         memset(vpd, 0, sizeof(vpd));
 307         rc = mv64x60_i2c_read(EEPROM2_ADDR, vpd, 0x1fde, 2, sizeof(vpd));
 308         if (rc < 0)
 309                 fatal("Error: Couldn't read eeprom2\n\r");
 310         mv64x60_i2c_close();
 311
 312         /* Get board type & related info */
 313         bip = prpmc2800_get_board_info(vpd);
 314         if (bip == NULL) {
 315                 printf("Error: Unsupported board or corrupted VPD:\n\r");
 316                 printf("  0x%x 0x%x 0x%x 0x%x 0x%x\n\r",
 317                                 vpd[0], vpd[1], vpd[2], vpd[3], vpd[4]);
 318                 printf("Using device tree defaults...\n\r");
 319         }
 320
 321         return bip;
 322 }
 323
 324 static void prpmc2800_bridge_setup(u32 mem_size)
 325 {
 326         u32 i, v[12], enables, acc_bits;
 327         u32 pci_base_hi, pci_base_lo, size, buf[2];
 328         unsigned long cpu_base;
 329         int rc;
 330         void *devp;
 331         u8 *bridge_pbase, is_coherent;
 332         struct mv64x60_cpu2pci_win *tbl;
 333
 334         bridge_pbase = mv64x60_get_bridge_pbase();
 335         is_coherent = mv64x60_is_coherent();
 336
 337         if (is_coherent)
 338                 acc_bits = MV64x60_PCI_ACC_CNTL_SNOOP_WB
 339                         | MV64x60_PCI_ACC_CNTL_SWAP_NONE
 340                         | MV64x60_PCI_ACC_CNTL_MBURST_32_BYTES
 341                         | MV64x60_PCI_ACC_CNTL_RDSIZE_32_BYTES;
 342         else
 343                 acc_bits = MV64x60_PCI_ACC_CNTL_SNOOP_NONE
 344                         | MV64x60_PCI_ACC_CNTL_SWAP_NONE
 345                         | MV64x60_PCI_ACC_CNTL_MBURST_128_BYTES
 346                         | MV64x60_PCI_ACC_CNTL_RDSIZE_256_BYTES;
 347
 348         mv64x60_config_ctlr_windows(bridge_base, bridge_pbase, is_coherent);
 349         mv64x60_config_pci_windows(bridge_base, bridge_pbase, 0, 0, mem_size,
 350                         acc_bits);
 351
 352         /* Get the cpu -> pci i/o & mem mappings from the device tree */
 353         devp = finddevice("/mv64x60/pci@80000000");
 354         if (devp == NULL)
 355                 fatal("Error: Missing /mv64x60/pci@80000000"
 356                                 " device tree node\n\r");
 357
 358         rc = getprop(devp, "ranges", v, sizeof(v));
 359         if (rc != sizeof(v))
 360                 fatal("Error: Can't find /mv64x60/pci@80000000/ranges"
 361                                 " property\n\r");
 362
 363         /* Get the cpu -> pci i/o & mem mappings from the device tree */
 364         devp = finddevice("/mv64x60");
 365         if (devp == NULL)
 366                 fatal("Error: Missing /mv64x60 device tree node\n\r");
 367
 368         enables = in_le32((u32 *)(bridge_base + MV64x60_CPU_BAR_ENABLE));
 369         enables |= 0x0007fe00; /* Disable all cpu->pci windows */
 370         out_le32((u32 *)(bridge_base + MV64x60_CPU_BAR_ENABLE), enables);
 371
 372         for (i=0; i<12; i+=6) {
 373                 switch (v[i] & 0xff000000) {
 374                 case 0x01000000: /* PCI I/O Space */
 375                         tbl = mv64x60_cpu2pci_io;
 376                         break;
 377                 case 0x02000000: /* PCI MEM Space */
 378                         tbl = mv64x60_cpu2pci_mem;
 379                         break;
 380                 default:
 381                         continue;
 382                 }
 383
 384                 pci_base_hi = v[i+1];
 385                 pci_base_lo = v[i+2];
 386                 cpu_base = v[i+3];
 387                 size = v[i+5];
 388
 389                 buf[0] = cpu_base;
 390                 buf[1] = size;
 391
 392                 if (!dt_xlate_addr(devp, buf, sizeof(buf), &cpu_base))
 393                         fatal("Error: Can't translate PCI address 0x%x\n\r",
 394                                         (u32)cpu_base);
 395
 396                 mv64x60_config_cpu2pci_window(bridge_base, 0, pci_base_hi,
 397                                 pci_base_lo, cpu_base, size, tbl);
 398         }
 399
 400         enables &= ~0x00000600; /* Enable cpu->pci0 i/o, cpu->pci0 mem0 */
 401         out_le32((u32 *)(bridge_base + MV64x60_CPU_BAR_ENABLE), enables);
 402 }
 403
 404 static void prpmc2800_fixups(void)
 405 {
 406         u32 v[2], l, mem_size;
 407         int rc;
 408         void *devp;
 409         char model[BOARD_MODEL_MAX];
 410         struct prpmc2800_board_info *bip;
 411
 412         bip = prpmc2800_get_bip(); /* Get board info based on VPD */
 413
 414         mem_size = (bip) ? bip->mem_size : mv64x60_get_mem_size(bridge_base);
 415         prpmc2800_bridge_setup(mem_size); /* Do necessary bridge setup */
 416
 417         /* If the VPD doesn't match what we know about, just use the
 418          * defaults already in the device tree.
 419          */
 420         if (!bip)
 421                 return;
 422
 423         /* Know the board type so override device tree defaults */
 424         /* Set /model appropriately */
 425         devp = finddevice("/");
 426         if (devp == NULL)
 427                 fatal("Error: Missing '/' device tree node\n\r");
 428         memset(model, 0, BOARD_MODEL_MAX);
 429         strncpy(model, BOARD_MODEL, BOARD_MODEL_MAX - 2);
 430         l = strlen(model);
 431         if (bip->model == BOARD_MODEL_PRPMC280)
 432                 l--;
 433         model[l++] = bip->variant;
 434         model[l++] = '\0';
 435         setprop(devp, "model", model, l);
 436
 437         /* Set /cpus/PowerPC,7447/clock-frequency */
 438         devp = finddevice("/cpus/PowerPC,7447");
 439         if (devp == NULL)
 440                 fatal("Error: Missing proper /cpus device tree node\n\r");
 441         v[0] = bip->core_speed;
 442         setprop(devp, "clock-frequency", &v[0], sizeof(v[0]));
 443
 444         /* Set /memory/reg size */
 445         devp = finddevice("/memory");
 446         if (devp == NULL)
 447                 fatal("Error: Missing /memory device tree node\n\r");
 448         v[0] = 0;
 449         v[1] = bip->mem_size;
 450         setprop(devp, "reg", v, sizeof(v));
 451
 452         /* Update /mv64x60/model, if this is a mv64362 */
 453         if (bip->bridge_type == BRIDGE_TYPE_MV64362) {
 454                 devp = finddevice("/mv64x60");
 455                 if (devp == NULL)
 456                         fatal("Error: Missing /mv64x60 device tree node\n\r");
 457                 setprop(devp, "model", "mv64362", strlen("mv64362") + 1);
 458         }
 459
 460         /* Set User FLASH size */
 461         devp = finddevice("/mv64x60/flash@a0000000");
 462         if (devp == NULL)
 463                 fatal("Error: Missing User FLASH device tree node\n\r");
 464         rc = getprop(devp, "reg", v, sizeof(v));
 465         if (rc != sizeof(v))
 466                 fatal("Error: Can't find User FLASH reg property\n\r");
 467         v[1] = bip->user_flash;
 468         setprop(devp, "reg", v, sizeof(v));
 469 }
 470
 471 #define MV64x60_MPP_CNTL_0      0xf000
 472 #define MV64x60_MPP_CNTL_2      0xf008
 473 #define MV64x60_GPP_IO_CNTL     0xf100
 474 #define MV64x60_GPP_LEVEL_CNTL  0xf110
 475 #define MV64x60_GPP_VALUE_SET   0xf118
 476
 477 static void prpmc2800_reset(void)
 478 {
 479         u32 temp;
 480
 481         udelay(5000000);
 482
 483         if (bridge_base != 0) {
 484                 temp = in_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_0));
 485                 temp &= 0xFFFF0FFF;
 486                 out_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_0), temp);
 487
 488                 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL));
 489                 temp |= 0x00000004;
 490                 out_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL), temp);
 491
 492                 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL));
 493                 temp |= 0x00000004;
 494                 out_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL), temp);
 495
 496                 temp = in_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_2));
 497                 temp &= 0xFFFF0FFF;
 498                 out_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_2), temp);
 499
 500                 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL));
 501                 temp |= 0x00080000;
 502                 out_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL), temp);
 503
 504                 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL));
 505                 temp |= 0x00080000;
 506                 out_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL), temp);
 507
 508                 out_le32((u32 *)(bridge_base + MV64x60_GPP_VALUE_SET),
 509                                 0x00080004);
 510         }
 511
 512         for (;;);
 513 }
 514
 515 #define HEAP_SIZE       (16*MB)
 516 static struct gunzip_state gzstate;
 517
 518 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 519                    unsigned long r6, unsigned long r7)
 520 {
 521         struct elf_info ei;
 522         char *heap_start, *dtb;
 523         int dt_size = _dtb_end - _dtb_start;
 524         void *vmlinuz_addr = _vmlinux_start;
 525         unsigned long vmlinuz_size = _vmlinux_end - _vmlinux_start;
 526         char elfheader[256];
 527
 528         if (dt_size <= 0) /* No fdt */
 529                 exit();
 530
 531         /*
 532          * Start heap after end of the kernel (after decompressed to
 533          * address 0) or the end of the zImage, whichever is higher.
 534          * That's so things allocated by simple_alloc won't overwrite
 535          * any part of the zImage and the kernel won't overwrite the dtb
 536          * when decompressed & relocated.
 537          */
 538         gunzip_start(&gzstate, vmlinuz_addr, vmlinuz_size);
 539         gunzip_exactly(&gzstate, elfheader, sizeof(elfheader));
 540
 541         if (!parse_elf32(elfheader, &ei))
 542                 exit();
 543
 544         heap_start = (char *)(ei.memsize + ei.elfoffset); /* end of kernel*/
 545         heap_start = max(heap_start, (char *)_end); /* end of zImage */
 546
 547         if ((unsigned)simple_alloc_init(heap_start, HEAP_SIZE, 2*KB, 16)
 548                         > (128*MB))
 549                 exit();
 550
 551         /* Relocate dtb to safe area past end of zImage & kernel */
 552         dtb = malloc(dt_size);
 553         if (!dtb)
 554                 exit();
 555         memmove(dtb, _dtb_start, dt_size);
 556         if (ft_init(dtb, dt_size, 16))
 557                 exit();
 558
 559         bridge_base = mv64x60_get_bridge_base();
 560
 561         platform_ops.fixups = prpmc2800_fixups;
 562         platform_ops.exit = prpmc2800_reset;
 563
 564         if (serial_console_init() < 0)
 565                 exit();
 566 }
 567
 568 /* _zimage_start called very early--need to turn off external interrupts */
 569 asm ("  .globl _zimage_start\n\
 570         _zimage_start:\n\
 571                 mfmsr   10\n\
 572                 rlwinm  10,10,0,~(1<<15)        /* Clear MSR_EE */\n\
 573                 sync\n\
 574                 mtmsr   10\n\
 575                 isync\n\
 576                 b _zimage_start_lib\n\
 577 ");