arch/m68k/lib/board.c

   1 /*
   2  * (C) Copyright 2003
   3  * Josef Baumgartner <josef.baumgartner@telex.de>
   4  *
   5  * (C) Copyright 2000-2002
   6  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12 #include <watchdog.h>
  13 #include <command.h>
  14 #include <malloc.h>
  15 #include <stdio_dev.h>
  16 #include <linux/compiler.h>
  17
  18 #include <asm/immap.h>
  19
  20 #if defined(CONFIG_CMD_IDE)
  21 #include <ide.h>
  22 #endif
  23 #if defined(CONFIG_CMD_SCSI)
  24 #include <scsi.h>
  25 #endif
  26 #if defined(CONFIG_CMD_KGDB)
  27 #include <kgdb.h>
  28 #endif
  29 #ifdef CONFIG_STATUS_LED
  30 #include <status_led.h>
  31 #endif
  32 #include <net.h>
  33 #include <serial.h>
  34 #if defined(CONFIG_CMD_BEDBUG)
  35 #include <cmd_bedbug.h>
  36 #endif
  37 #ifdef CONFIG_SYS_ALLOC_DPRAM
  38 #include <commproc.h>
  39 #endif
  40 #include <version.h>
  41
  42 #if defined(CONFIG_HARD_I2C) || \
  43     defined(CONFIG_SOFT_I2C)
  44 #include <i2c.h>
  45 #endif
  46
  47 #ifdef CONFIG_CMD_SPI
  48 #include <spi.h>
  49 #endif
  50
  51 #ifdef CONFIG_BITBANGMII
  52 #include <miiphy.h>
  53 #endif
  54
  55 #include <nand.h>
  56
  57 DECLARE_GLOBAL_DATA_PTR;
  58
  59 static char *failed = "*** failed ***\n";
  60
  61 #include <environment.h>
  62
  63 extern ulong __init_end;
  64 extern ulong __bss_end;
  65
  66 #if defined(CONFIG_WATCHDOG)
  67 # undef INIT_FUNC_WATCHDOG_INIT
  68 # define INIT_FUNC_WATCHDOG_INIT        watchdog_init,
  69 # define WATCHDOG_DISABLE               watchdog_disable
  70
  71 extern int watchdog_init(void);
  72 extern int watchdog_disable(void);
  73 #else
  74 # define INIT_FUNC_WATCHDOG_INIT        /* undef */
  75 # define WATCHDOG_DISABLE               /* undef */
  76 #endif /* CONFIG_WATCHDOG */
  77
  78 ulong monitor_flash_len;
  79
  80 /************************************************************************
  81  * Utilities                                                            *
  82  ************************************************************************
  83  */
  84
  85 /*
  86  * All attempts to come up with a "common" initialization sequence
  87  * that works for all boards and architectures failed: some of the
  88  * requirements are just _too_ different. To get rid of the resulting
  89  * mess of board dependend #ifdef'ed code we now make the whole
  90  * initialization sequence configurable to the user.
  91  *
  92  * The requirements for any new initalization function is simple: it
  93  * receives a pointer to the "global data" structure as it's only
  94  * argument, and returns an integer return code, where 0 means
  95  * "continue" and != 0 means "fatal error, hang the system".
  96  */
  97 typedef int (init_fnc_t) (void);
  98
  99 /************************************************************************
 100  * Init Utilities
 101  ************************************************************************
 102  * Some of this code should be moved into the core functions,
 103  * but let's get it working (again) first...
 104  */
 105
 106 static int init_baudrate (void)
 107 {
 108         gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
 109         return 0;
 110 }
 111
 112 /***********************************************************************/
 113
 114 static int init_func_ram (void)
 115 {
 116         int board_type = 0;     /* use dummy arg */
 117         puts ("DRAM:  ");
 118
 119         if ((gd->ram_size = initdram (board_type)) > 0) {
 120                 print_size (gd->ram_size, "\n");
 121                 return (0);
 122         }
 123         puts (failed);
 124         return (1);
 125 }
 126
 127 /***********************************************************************/
 128
 129 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
 130 static int init_func_i2c (void)
 131 {
 132         puts ("I2C:   ");
 133         i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 134         puts ("ready\n");
 135         return (0);
 136 }
 137 #endif
 138
 139 #if defined(CONFIG_HARD_SPI)
 140 static int init_func_spi (void)
 141 {
 142         puts ("SPI:   ");
 143         spi_init ();
 144         puts ("ready\n");
 145         return (0);
 146 }
 147 #endif
 148
 149 /***********************************************************************/
 150
 151 /************************************************************************
 152  * Initialization sequence                                              *
 153  ************************************************************************
 154  */
 155
 156 init_fnc_t *init_sequence[] = {
 157         get_clocks,
 158         env_init,
 159         init_baudrate,
 160         serial_init,
 161         console_init_f,
 162         display_options,
 163         checkcpu,
 164         checkboard,
 165 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
 166         init_func_i2c,
 167 #endif
 168 #if defined(CONFIG_HARD_SPI)
 169         init_func_spi,
 170 #endif
 171         init_func_ram,
 172 #if defined(CONFIG_SYS_DRAM_TEST)
 173         testdram,
 174 #endif /* CONFIG_SYS_DRAM_TEST */
 175         INIT_FUNC_WATCHDOG_INIT
 176         NULL,                   /* Terminate this list */
 177 };
 178
 179
 180 /************************************************************************
 181  *
 182  * This is the first part of the initialization sequence that is
 183  * implemented in C, but still running from ROM.
 184  *
 185  * The main purpose is to provide a (serial) console interface as
 186  * soon as possible (so we can see any error messages), and to
 187  * initialize the RAM so that we can relocate the monitor code to
 188  * RAM.
 189  *
 190  * Be aware of the restrictions: global data is read-only, BSS is not
 191  * initialized, and stack space is limited to a few kB.
 192  *
 193  ************************************************************************
 194  */
 195
 196 void
 197 board_init_f (ulong bootflag)
 198 {
 199         bd_t *bd;
 200         ulong len, addr, addr_sp;
 201         ulong *paddr;
 202         gd_t *id;
 203         init_fnc_t **init_fnc_ptr;
 204 #ifdef CONFIG_PRAM
 205         ulong reg;
 206 #endif
 207
 208         /* Pointer is writable since we allocated a register for it */
 209         gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
 210         /* compiler optimization barrier needed for GCC >= 3.4 */
 211         __asm__ __volatile__("": : :"memory");
 212
 213         /* Clear initial global data */
 214         memset ((void *) gd, 0, sizeof (gd_t));
 215
 216         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 217                 if ((*init_fnc_ptr)() != 0) {
 218                         hang ();
 219                 }
 220         }
 221
 222         /*
 223          * Now that we have DRAM mapped and working, we can
 224          * relocate the code and continue running from DRAM.
 225          *
 226          * Reserve memory at end of RAM for (top down in that order):
 227          *      - protected RAM
 228          *      - LCD framebuffer
 229          *      - monitor code
 230          *      - board info struct
 231          */
 232         len = (ulong)&__bss_end - CONFIG_SYS_MONITOR_BASE;
 233
 234         addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
 235
 236 #ifdef CONFIG_LOGBUFFER
 237         /* reserve kernel log buffer */
 238         addr -= (LOGBUFF_RESERVE);
 239         debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
 240 #endif
 241
 242 #ifdef CONFIG_PRAM
 243         /*
 244          * reserve protected RAM
 245          */
 246         reg = getenv_ulong("pram", 10, CONFIG_PRAM);
 247         addr -= (reg << 10);            /* size is in kB */
 248         debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
 249 #endif /* CONFIG_PRAM */
 250
 251         /* round down to next 4 kB limit */
 252         addr &= ~(4096 - 1);
 253         debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
 254
 255 #ifdef CONFIG_LCD
 256 #ifdef CONFIG_FB_ADDR
 257         gd->fb_base = CONFIG_FB_ADDR;
 258 #else
 259         /* reserve memory for LCD display (always full pages) */
 260         addr = lcd_setmem (addr);
 261         gd->fb_base = addr;
 262 #endif /* CONFIG_FB_ADDR */
 263 #endif /* CONFIG_LCD */
 264
 265         /*
 266          * reserve memory for U-Boot code, data & bss
 267          * round down to next 4 kB limit
 268          */
 269         addr -= len;
 270         addr &= ~(4096 - 1);
 271
 272         debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
 273
 274         /*
 275          * reserve memory for malloc() arena
 276          */
 277         addr_sp = addr - TOTAL_MALLOC_LEN;
 278         debug ("Reserving %dk for malloc() at: %08lx\n",
 279                         TOTAL_MALLOC_LEN >> 10, addr_sp);
 280
 281         /*
 282          * (permanently) allocate a Board Info struct
 283          * and a permanent copy of the "global" data
 284          */
 285         addr_sp -= sizeof (bd_t);
 286         bd = (bd_t *) addr_sp;
 287         gd->bd = bd;
 288         debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
 289                         sizeof (bd_t), addr_sp);
 290         addr_sp -= sizeof (gd_t);
 291         id = (gd_t *) addr_sp;
 292         debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
 293                         sizeof (gd_t), addr_sp);
 294
 295         /* Reserve memory for boot params. */
 296         addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
 297         bd->bi_boot_params = addr_sp;
 298         debug ("Reserving %dk for boot parameters at: %08lx\n",
 299                         CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
 300
 301         /*
 302          * Finally, we set up a new (bigger) stack.
 303          *
 304          * Leave some safety gap for SP, force alignment on 16 byte boundary
 305          * Clear initial stack frame
 306          */
 307         addr_sp -= 16;
 308         addr_sp &= ~0xF;
 309
 310         paddr = (ulong *)addr_sp;
 311         *paddr-- = 0;
 312         *paddr-- = 0;
 313         addr_sp = (ulong)paddr;
 314
 315         debug ("Stack Pointer at: %08lx\n", addr_sp);
 316
 317         /*
 318          * Save local variables to board info struct
 319          */
 320         bd->bi_memstart  = CONFIG_SYS_SDRAM_BASE;       /* start of  DRAM memory      */
 321         bd->bi_memsize   = gd->ram_size;        /* size  of  DRAM memory in bytes */
 322 #ifdef CONFIG_SYS_INIT_RAM_ADDR
 323         bd->bi_sramstart = CONFIG_SYS_INIT_RAM_ADDR;    /* start of  SRAM memory        */
 324         bd->bi_sramsize  = CONFIG_SYS_INIT_RAM_SIZE;    /* size  of  SRAM memory        */
 325 #endif
 326         bd->bi_mbar_base = CONFIG_SYS_MBAR;             /* base of internal registers */
 327
 328         bd->bi_bootflags = bootflag;            /* boot / reboot flag (for LynxOS)    */
 329
 330         WATCHDOG_RESET ();
 331         bd->bi_intfreq = gd->cpu_clk;   /* Internal Freq, in Hz */
 332         bd->bi_busfreq = gd->bus_clk;   /* Bus Freq,      in Hz */
 333 #ifdef CONFIG_PCI
 334         bd->bi_pcifreq = gd->pci_clk;           /* PCI Freq in Hz */
 335 #endif
 336 #ifdef CONFIG_EXTRA_CLOCK
 337         bd->bi_inpfreq = gd->arch.inp_clk;              /* input Freq in Hz */
 338         bd->bi_vcofreq = gd->arch.vco_clk;              /* vco Freq in Hz */
 339         bd->bi_flbfreq = gd->arch.flb_clk;              /* flexbus Freq in Hz */
 340 #endif
 341         bd->bi_baudrate = gd->baudrate; /* Console Baudrate     */
 342
 343 #ifdef CONFIG_SYS_EXTBDINFO
 344         strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version));
 345         strncpy (bd->bi_r_version, U_BOOT_VERSION, sizeof (bd->bi_r_version));
 346 #endif
 347
 348         WATCHDOG_RESET ();
 349
 350 #ifdef CONFIG_POST
 351         post_bootmode_init();
 352         post_run (NULL, POST_ROM | post_bootmode_get(0));
 353 #endif
 354
 355         WATCHDOG_RESET();
 356
 357         memcpy (id, (void *)gd, sizeof (gd_t));
 358
 359         debug ("Start relocate of code from %08x to %08lx\n", CONFIG_SYS_MONITOR_BASE, addr);
 360         relocate_code (addr_sp, id, addr);
 361
 362         /* NOTREACHED - jump_to_ram() does not return */
 363 }
 364
 365 /************************************************************************
 366  *
 367  * This is the next part if the initialization sequence: we are now
 368  * running from RAM and have a "normal" C environment, i. e. global
 369  * data can be written, BSS has been cleared, the stack size in not
 370  * that critical any more, etc.
 371  *
 372  ************************************************************************
 373  */
 374 void board_init_r (gd_t *id, ulong dest_addr)
 375 {
 376         char *s __maybe_unused;
 377         bd_t *bd;
 378
 379 #ifndef CONFIG_ENV_IS_NOWHERE
 380         extern char * env_name_spec;
 381 #endif
 382 #ifndef CONFIG_SYS_NO_FLASH
 383         ulong flash_size;
 384 #endif
 385         gd = id;                /* initialize RAM version of global data */
 386         bd = gd->bd;
 387
 388         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 389
 390         WATCHDOG_RESET ();
 391
 392         gd->reloc_off =  dest_addr - CONFIG_SYS_MONITOR_BASE;
 393
 394         serial_initialize();
 395
 396         debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
 397
 398         monitor_flash_len = (ulong)&__init_end - dest_addr;
 399
 400 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 401         /*
 402          * We have to relocate the command table manually
 403          */
 404         fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd),
 405                         ll_entry_count(cmd_tbl_t, cmd));
 406 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
 407
 408         /* there are some other pointer constants we must deal with */
 409 #ifndef CONFIG_ENV_IS_NOWHERE
 410         env_name_spec += gd->reloc_off;
 411 #endif
 412
 413         WATCHDOG_RESET ();
 414
 415 #ifdef CONFIG_LOGBUFFER
 416         logbuff_init_ptrs ();
 417 #endif
 418 #ifdef CONFIG_POST
 419         post_output_backlog ();
 420         post_reloc ();
 421 #endif
 422         WATCHDOG_RESET();
 423
 424 #if 0
 425         /* instruction cache enabled in cpu_init_f() for faster relocation */
 426         icache_enable ();       /* it's time to enable the instruction cache */
 427 #endif
 428
 429         /*
 430          * Setup trap handlers
 431          */
 432         trap_init (CONFIG_SYS_SDRAM_BASE);
 433
 434         /* The Malloc area is immediately below the monitor copy in DRAM */
 435         mem_malloc_init (CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
 436                         TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
 437
 438 #if !defined(CONFIG_SYS_NO_FLASH)
 439         puts ("Flash: ");
 440
 441         if ((flash_size = flash_init ()) > 0) {
 442 # ifdef CONFIG_SYS_FLASH_CHECKSUM
 443                 print_size (flash_size, "");
 444                 /*
 445                  * Compute and print flash CRC if flashchecksum is set to 'y'
 446                  *
 447                  * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
 448                  */
 449                 if (getenv_yesno("flashchecksum") == 1) {
 450                         printf ("  CRC: %08X",
 451                                         crc32 (0,
 452                                                    (const unsigned char *) CONFIG_SYS_FLASH_BASE,
 453                                                    flash_size)
 454                                         );
 455                 }
 456                 putc ('\n');
 457 # else  /* !CONFIG_SYS_FLASH_CHECKSUM */
 458                 print_size (flash_size, "\n");
 459 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
 460         } else {
 461                 puts (failed);
 462                 hang ();
 463         }
 464
 465         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;      /* update start of FLASH memory    */
 466         bd->bi_flashsize = flash_size;  /* size of FLASH memory (final value) */
 467         bd->bi_flashoffset = 0;
 468 #else   /* CONFIG_SYS_NO_FLASH */
 469         bd->bi_flashsize = 0;
 470         bd->bi_flashstart = 0;
 471         bd->bi_flashoffset = 0;
 472 #endif /* !CONFIG_SYS_NO_FLASH */
 473
 474         WATCHDOG_RESET ();
 475
 476         /* initialize higher level parts of CPU like time base and timers */
 477         cpu_init_r ();
 478
 479         WATCHDOG_RESET ();
 480
 481 #ifdef CONFIG_SPI
 482 # if !defined(CONFIG_ENV_IS_IN_EEPROM)
 483         spi_init_f ();
 484 # endif
 485         spi_init_r ();
 486 #endif
 487
 488         /* relocate environment function pointers etc. */
 489         env_relocate ();
 490
 491         WATCHDOG_RESET ();
 492
 493 #if defined(CONFIG_PCI)
 494         /*
 495          * Do pci configuration
 496          */
 497         pci_init ();
 498 #endif
 499
 500         /** leave this here (after malloc(), environment and PCI are working) **/
 501         /* Initialize stdio devices */
 502         stdio_init ();
 503
 504         /* Initialize the jump table for applications */
 505         jumptable_init ();
 506
 507         /* Initialize the console (after the relocation and devices init) */
 508         console_init_r ();
 509
 510 #if defined(CONFIG_MISC_INIT_R)
 511         /* miscellaneous platform dependent initialisations */
 512         misc_init_r ();
 513 #endif
 514
 515 #if defined(CONFIG_CMD_KGDB)
 516         WATCHDOG_RESET ();
 517         puts ("KGDB:  ");
 518         kgdb_init ();
 519 #endif
 520
 521         debug ("U-Boot relocated to %08lx\n", dest_addr);
 522
 523         /*
 524          * Enable Interrupts
 525          */
 526         interrupt_init ();
 527
 528         /* Must happen after interrupts are initialized since
 529          * an irq handler gets installed
 530          */
 531         timer_init();
 532
 533 #ifdef CONFIG_STATUS_LED
 534         status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
 535 #endif
 536
 537         udelay (20);
 538
 539         /* Insert function pointers now that we have relocated the code */
 540
 541         /* Initialize from environment */
 542         load_addr = getenv_ulong("loadaddr", 16, load_addr);
 543
 544         WATCHDOG_RESET ();
 545
 546 #if defined(CONFIG_CMD_DOC)
 547         WATCHDOG_RESET ();
 548         puts ("DOC:   ");
 549         doc_init ();
 550 #endif
 551
 552 #if defined(CONFIG_CMD_NAND)
 553         WATCHDOG_RESET ();
 554         puts ("NAND:  ");
 555         nand_init();            /* go init the NAND */
 556 #endif
 557
 558 #ifdef CONFIG_BITBANGMII
 559         bb_miiphy_init();
 560 #endif
 561 #if defined(CONFIG_CMD_NET)
 562         WATCHDOG_RESET();
 563 #if defined(FEC_ENET)
 564         eth_init(bd);
 565 #endif
 566         puts ("Net:   ");
 567         eth_initialize (bd);
 568 #endif
 569
 570 #ifdef CONFIG_POST
 571         post_run (NULL, POST_RAM | post_bootmode_get(0));
 572 #endif
 573
 574 #if defined(CONFIG_CMD_PCMCIA) \
 575     && !defined(CONFIG_CMD_IDE)
 576         WATCHDOG_RESET ();
 577         puts ("PCMCIA:");
 578         pcmcia_init ();
 579 #endif
 580
 581 #if defined(CONFIG_CMD_IDE)
 582         WATCHDOG_RESET ();
 583         puts ("IDE:   ");
 584         ide_init ();
 585 #endif
 586
 587 #ifdef CONFIG_LAST_STAGE_INIT
 588         WATCHDOG_RESET ();
 589         /*
 590          * Some parts can be only initialized if all others (like
 591          * Interrupts) are up and running (i.e. the PC-style ISA
 592          * keyboard).
 593          */
 594         last_stage_init ();
 595 #endif
 596
 597 #if defined(CONFIG_CMD_BEDBUG)
 598         WATCHDOG_RESET ();
 599         bedbug_init ();
 600 #endif
 601
 602 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
 603         /*
 604          * Export available size of memory for Linux,
 605          * taking into account the protected RAM at top of memory
 606          */
 607         {
 608                 ulong pram = 0;
 609                 char memsz[32];
 610
 611 #ifdef CONFIG_PRAM
 612                 pram = getenv_ulong("pram", 10, CONFIG_PRAM);
 613 #endif
 614 #ifdef CONFIG_LOGBUFFER
 615                 /* Also take the logbuffer into account (pram is in kB) */
 616                 pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
 617 #endif
 618                 sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
 619                 setenv ("mem", memsz);
 620         }
 621 #endif
 622
 623 #ifdef CONFIG_MODEM_SUPPORT
 624  {
 625          extern int do_mdm_init;
 626          do_mdm_init = gd->do_mdm_init;
 627  }
 628 #endif
 629
 630 #ifdef CONFIG_WATCHDOG
 631         /* disable watchdog if environment is set */
 632         if ((s = getenv ("watchdog")) != NULL) {
 633                 if (strncmp (s, "off", 3) == 0) {
 634                         WATCHDOG_DISABLE ();
 635                 }
 636         }
 637 #endif /* CONFIG_WATCHDOG*/
 638
 639
 640         /* Initialization complete - start the monitor */
 641
 642         /* main_loop() can return to retry autoboot, if so just run it again. */
 643         for (;;) {
 644                 WATCHDOG_RESET ();
 645                 main_loop ();
 646         }
 647
 648         /* NOTREACHED - no way out of command loop except booting */
 649 }