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_SYS_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_SYS_I2C)
 130 static int init_func_i2c (void)
 131 {
 132         puts ("I2C:   ");
 133 #ifdef CONFIG_SYS_I2C
 134         i2c_init_all();
 135 #else
 136         i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 137 #endif
 138         puts ("ready\n");
 139         return (0);
 140 }
 141 #endif
 142
 143 #if defined(CONFIG_HARD_SPI)
 144 static int init_func_spi (void)
 145 {
 146         puts ("SPI:   ");
 147         spi_init ();
 148         puts ("ready\n");
 149         return (0);
 150 }
 151 #endif
 152
 153 /***********************************************************************/
 154
 155 /************************************************************************
 156  * Initialization sequence                                              *
 157  ************************************************************************
 158  */
 159
 160 init_fnc_t *init_sequence[] = {
 161         get_clocks,
 162         env_init,
 163         init_baudrate,
 164         serial_init,
 165         console_init_f,
 166         display_options,
 167         checkcpu,
 168         checkboard,
 169 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
 170         init_func_i2c,
 171 #endif
 172 #if defined(CONFIG_HARD_SPI)
 173         init_func_spi,
 174 #endif
 175         init_func_ram,
 176 #if defined(CONFIG_SYS_DRAM_TEST)
 177         testdram,
 178 #endif /* CONFIG_SYS_DRAM_TEST */
 179         INIT_FUNC_WATCHDOG_INIT
 180         NULL,                   /* Terminate this list */
 181 };
 182
 183
 184 /************************************************************************
 185  *
 186  * This is the first part of the initialization sequence that is
 187  * implemented in C, but still running from ROM.
 188  *
 189  * The main purpose is to provide a (serial) console interface as
 190  * soon as possible (so we can see any error messages), and to
 191  * initialize the RAM so that we can relocate the monitor code to
 192  * RAM.
 193  *
 194  * Be aware of the restrictions: global data is read-only, BSS is not
 195  * initialized, and stack space is limited to a few kB.
 196  *
 197  ************************************************************************
 198  */
 199
 200 void
 201 board_init_f (ulong bootflag)
 202 {
 203         bd_t *bd;
 204         ulong len, addr, addr_sp;
 205         ulong *paddr;
 206         gd_t *id;
 207         init_fnc_t **init_fnc_ptr;
 208 #ifdef CONFIG_PRAM
 209         ulong reg;
 210 #endif
 211
 212         /* Pointer is writable since we allocated a register for it */
 213         gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
 214         /* compiler optimization barrier needed for GCC >= 3.4 */
 215         __asm__ __volatile__("": : :"memory");
 216
 217         /* Clear initial global data */
 218         memset ((void *) gd, 0, sizeof (gd_t));
 219
 220         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 221                 if ((*init_fnc_ptr)() != 0) {
 222                         hang ();
 223                 }
 224         }
 225
 226         /*
 227          * Now that we have DRAM mapped and working, we can
 228          * relocate the code and continue running from DRAM.
 229          *
 230          * Reserve memory at end of RAM for (top down in that order):
 231          *      - protected RAM
 232          *      - LCD framebuffer
 233          *      - monitor code
 234          *      - board info struct
 235          */
 236         len = (ulong)&__bss_end - CONFIG_SYS_MONITOR_BASE;
 237
 238         addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
 239
 240 #ifdef CONFIG_LOGBUFFER
 241         /* reserve kernel log buffer */
 242         addr -= (LOGBUFF_RESERVE);
 243         debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
 244 #endif
 245
 246 #ifdef CONFIG_PRAM
 247         /*
 248          * reserve protected RAM
 249          */
 250         reg = getenv_ulong("pram", 10, CONFIG_PRAM);
 251         addr -= (reg << 10);            /* size is in kB */
 252         debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
 253 #endif /* CONFIG_PRAM */
 254
 255         /* round down to next 4 kB limit */
 256         addr &= ~(4096 - 1);
 257         debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
 258
 259 #ifdef CONFIG_LCD
 260 #ifdef CONFIG_FB_ADDR
 261         gd->fb_base = CONFIG_FB_ADDR;
 262 #else
 263         /* reserve memory for LCD display (always full pages) */
 264         addr = lcd_setmem (addr);
 265         gd->fb_base = addr;
 266 #endif /* CONFIG_FB_ADDR */
 267 #endif /* CONFIG_LCD */
 268
 269         /*
 270          * reserve memory for U-Boot code, data & bss
 271          * round down to next 4 kB limit
 272          */
 273         addr -= len;
 274         addr &= ~(4096 - 1);
 275
 276         debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
 277
 278         /*
 279          * reserve memory for malloc() arena
 280          */
 281         addr_sp = addr - TOTAL_MALLOC_LEN;
 282         debug ("Reserving %dk for malloc() at: %08lx\n",
 283                         TOTAL_MALLOC_LEN >> 10, addr_sp);
 284
 285         /*
 286          * (permanently) allocate a Board Info struct
 287          * and a permanent copy of the "global" data
 288          */
 289         addr_sp -= sizeof (bd_t);
 290         bd = (bd_t *) addr_sp;
 291         gd->bd = bd;
 292         debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
 293                         sizeof (bd_t), addr_sp);
 294         addr_sp -= sizeof (gd_t);
 295         id = (gd_t *) addr_sp;
 296         debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
 297                         sizeof (gd_t), addr_sp);
 298
 299         /* Reserve memory for boot params. */
 300         addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
 301         bd->bi_boot_params = addr_sp;
 302         debug ("Reserving %dk for boot parameters at: %08lx\n",
 303                         CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
 304
 305         /*
 306          * Finally, we set up a new (bigger) stack.
 307          *
 308          * Leave some safety gap for SP, force alignment on 16 byte boundary
 309          * Clear initial stack frame
 310          */
 311         addr_sp -= 16;
 312         addr_sp &= ~0xF;
 313
 314         paddr = (ulong *)addr_sp;
 315         *paddr-- = 0;
 316         *paddr-- = 0;
 317         addr_sp = (ulong)paddr;
 318
 319         debug ("Stack Pointer at: %08lx\n", addr_sp);
 320
 321         /*
 322          * Save local variables to board info struct
 323          */
 324         bd->bi_memstart  = CONFIG_SYS_SDRAM_BASE;       /* start of  DRAM memory      */
 325         bd->bi_memsize   = gd->ram_size;        /* size  of  DRAM memory in bytes */
 326 #ifdef CONFIG_SYS_INIT_RAM_ADDR
 327         bd->bi_sramstart = CONFIG_SYS_INIT_RAM_ADDR;    /* start of  SRAM memory        */
 328         bd->bi_sramsize  = CONFIG_SYS_INIT_RAM_SIZE;    /* size  of  SRAM memory        */
 329 #endif
 330         bd->bi_mbar_base = CONFIG_SYS_MBAR;             /* base of internal registers */
 331
 332         bd->bi_bootflags = bootflag;            /* boot / reboot flag (for LynxOS)    */
 333
 334         WATCHDOG_RESET ();
 335         bd->bi_intfreq = gd->cpu_clk;   /* Internal Freq, in Hz */
 336         bd->bi_busfreq = gd->bus_clk;   /* Bus Freq,      in Hz */
 337 #ifdef CONFIG_PCI
 338         bd->bi_pcifreq = gd->pci_clk;           /* PCI Freq in Hz */
 339 #endif
 340 #ifdef CONFIG_EXTRA_CLOCK
 341         bd->bi_inpfreq = gd->arch.inp_clk;              /* input Freq in Hz */
 342         bd->bi_vcofreq = gd->arch.vco_clk;              /* vco Freq in Hz */
 343         bd->bi_flbfreq = gd->arch.flb_clk;              /* flexbus Freq in Hz */
 344 #endif
 345
 346 #ifdef CONFIG_SYS_EXTBDINFO
 347         strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version));
 348         strncpy (bd->bi_r_version, U_BOOT_VERSION, sizeof (bd->bi_r_version));
 349 #endif
 350
 351         WATCHDOG_RESET ();
 352
 353 #ifdef CONFIG_POST
 354         post_bootmode_init();
 355         post_run (NULL, POST_ROM | post_bootmode_get(0));
 356 #endif
 357
 358         WATCHDOG_RESET();
 359
 360         memcpy (id, (void *)gd, sizeof (gd_t));
 361
 362         debug ("Start relocate of code from %08x to %08lx\n", CONFIG_SYS_MONITOR_BASE, addr);
 363         relocate_code (addr_sp, id, addr);
 364
 365         /* NOTREACHED - jump_to_ram() does not return */
 366 }
 367
 368 /************************************************************************
 369  *
 370  * This is the next part if the initialization sequence: we are now
 371  * running from RAM and have a "normal" C environment, i. e. global
 372  * data can be written, BSS has been cleared, the stack size in not
 373  * that critical any more, etc.
 374  *
 375  ************************************************************************
 376  */
 377 void board_init_r (gd_t *id, ulong dest_addr)
 378 {
 379         char *s __maybe_unused;
 380         bd_t *bd;
 381
 382 #ifndef CONFIG_ENV_IS_NOWHERE
 383         extern char * env_name_spec;
 384 #endif
 385 #ifndef CONFIG_SYS_NO_FLASH
 386         ulong flash_size;
 387 #endif
 388         gd = id;                /* initialize RAM version of global data */
 389         bd = gd->bd;
 390
 391         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 392
 393         WATCHDOG_RESET ();
 394
 395         gd->reloc_off =  dest_addr - CONFIG_SYS_MONITOR_BASE;
 396
 397         serial_initialize();
 398
 399         debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
 400
 401         monitor_flash_len = (ulong)&__init_end - dest_addr;
 402
 403 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 404         /*
 405          * We have to relocate the command table manually
 406          */
 407         fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd),
 408                         ll_entry_count(cmd_tbl_t, cmd));
 409 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
 410
 411         /* there are some other pointer constants we must deal with */
 412 #ifndef CONFIG_ENV_IS_NOWHERE
 413         env_name_spec += gd->reloc_off;
 414 #endif
 415
 416         WATCHDOG_RESET ();
 417
 418 #ifdef CONFIG_LOGBUFFER
 419         logbuff_init_ptrs ();
 420 #endif
 421 #ifdef CONFIG_POST
 422         post_output_backlog ();
 423         post_reloc ();
 424 #endif
 425         WATCHDOG_RESET();
 426
 427 #if 0
 428         /* instruction cache enabled in cpu_init_f() for faster relocation */
 429         icache_enable ();       /* it's time to enable the instruction cache */
 430 #endif
 431
 432         /*
 433          * Setup trap handlers
 434          */
 435         trap_init (CONFIG_SYS_SDRAM_BASE);
 436
 437         /* The Malloc area is immediately below the monitor copy in DRAM */
 438         mem_malloc_init (CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
 439                         TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
 440
 441 #if !defined(CONFIG_SYS_NO_FLASH)
 442         puts ("Flash: ");
 443
 444         if ((flash_size = flash_init ()) > 0) {
 445 # ifdef CONFIG_SYS_FLASH_CHECKSUM
 446                 print_size (flash_size, "");
 447                 /*
 448                  * Compute and print flash CRC if flashchecksum is set to 'y'
 449                  *
 450                  * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
 451                  */
 452                 if (getenv_yesno("flashchecksum") == 1) {
 453                         printf ("  CRC: %08X",
 454                                         crc32 (0,
 455                                                    (const unsigned char *) CONFIG_SYS_FLASH_BASE,
 456                                                    flash_size)
 457                                         );
 458                 }
 459                 putc ('\n');
 460 # else  /* !CONFIG_SYS_FLASH_CHECKSUM */
 461                 print_size (flash_size, "\n");
 462 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
 463         } else {
 464                 puts (failed);
 465                 hang ();
 466         }
 467
 468         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;      /* update start of FLASH memory    */
 469         bd->bi_flashsize = flash_size;  /* size of FLASH memory (final value) */
 470         bd->bi_flashoffset = 0;
 471 #else   /* CONFIG_SYS_NO_FLASH */
 472         bd->bi_flashsize = 0;
 473         bd->bi_flashstart = 0;
 474         bd->bi_flashoffset = 0;
 475 #endif /* !CONFIG_SYS_NO_FLASH */
 476
 477         WATCHDOG_RESET ();
 478
 479         /* initialize higher level parts of CPU like time base and timers */
 480         cpu_init_r ();
 481
 482         WATCHDOG_RESET ();
 483
 484 #ifdef CONFIG_SPI
 485 # if !defined(CONFIG_ENV_IS_IN_EEPROM)
 486         spi_init_f ();
 487 # endif
 488         spi_init_r ();
 489 #endif
 490
 491 #if defined(CONFIG_SYS_I2C)
 492         /* Adjust I2C subsystem pointers after relocation */
 493         i2c_reloc_fixup();
 494 #endif
 495
 496         /* relocate environment function pointers etc. */
 497         env_relocate ();
 498
 499         WATCHDOG_RESET ();
 500
 501 #if defined(CONFIG_PCI)
 502         /*
 503          * Do pci configuration
 504          */
 505         pci_init ();
 506 #endif
 507
 508         /** leave this here (after malloc(), environment and PCI are working) **/
 509         /* Initialize stdio devices */
 510         stdio_init ();
 511
 512         /* Initialize the jump table for applications */
 513         jumptable_init ();
 514
 515         /* Initialize the console (after the relocation and devices init) */
 516         console_init_r ();
 517
 518 #if defined(CONFIG_MISC_INIT_R)
 519         /* miscellaneous platform dependent initialisations */
 520         misc_init_r ();
 521 #endif
 522
 523 #if defined(CONFIG_CMD_KGDB)
 524         WATCHDOG_RESET ();
 525         puts ("KGDB:  ");
 526         kgdb_init ();
 527 #endif
 528
 529         debug ("U-Boot relocated to %08lx\n", dest_addr);
 530
 531         /*
 532          * Enable Interrupts
 533          */
 534         interrupt_init ();
 535
 536         /* Must happen after interrupts are initialized since
 537          * an irq handler gets installed
 538          */
 539         timer_init();
 540
 541 #ifdef CONFIG_STATUS_LED
 542         status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
 543 #endif
 544
 545         udelay (20);
 546
 547         /* Insert function pointers now that we have relocated the code */
 548
 549         /* Initialize from environment */
 550         load_addr = getenv_ulong("loadaddr", 16, load_addr);
 551
 552         WATCHDOG_RESET ();
 553
 554 #if defined(CONFIG_CMD_DOC)
 555         WATCHDOG_RESET ();
 556         puts ("DOC:   ");
 557         doc_init ();
 558 #endif
 559
 560 #if defined(CONFIG_CMD_NAND)
 561         WATCHDOG_RESET ();
 562         puts ("NAND:  ");
 563         nand_init();            /* go init the NAND */
 564 #endif
 565
 566 #ifdef CONFIG_BITBANGMII
 567         bb_miiphy_init();
 568 #endif
 569 #if defined(CONFIG_CMD_NET)
 570         WATCHDOG_RESET();
 571 #if defined(FEC_ENET)
 572         eth_init(bd);
 573 #endif
 574         puts ("Net:   ");
 575         eth_initialize (bd);
 576 #endif
 577
 578 #ifdef CONFIG_POST
 579         post_run (NULL, POST_RAM | post_bootmode_get(0));
 580 #endif
 581
 582 #if defined(CONFIG_CMD_PCMCIA) \
 583     && !defined(CONFIG_CMD_IDE)
 584         WATCHDOG_RESET ();
 585         puts ("PCMCIA:");
 586         pcmcia_init ();
 587 #endif
 588
 589 #if defined(CONFIG_CMD_IDE)
 590         WATCHDOG_RESET ();
 591         puts ("IDE:   ");
 592         ide_init ();
 593 #endif
 594
 595 #ifdef CONFIG_LAST_STAGE_INIT
 596         WATCHDOG_RESET ();
 597         /*
 598          * Some parts can be only initialized if all others (like
 599          * Interrupts) are up and running (i.e. the PC-style ISA
 600          * keyboard).
 601          */
 602         last_stage_init ();
 603 #endif
 604
 605 #if defined(CONFIG_CMD_BEDBUG)
 606         WATCHDOG_RESET ();
 607         bedbug_init ();
 608 #endif
 609
 610 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
 611         /*
 612          * Export available size of memory for Linux,
 613          * taking into account the protected RAM at top of memory
 614          */
 615         {
 616                 ulong pram = 0;
 617                 char memsz[32];
 618
 619 #ifdef CONFIG_PRAM
 620                 pram = getenv_ulong("pram", 10, CONFIG_PRAM);
 621 #endif
 622 #ifdef CONFIG_LOGBUFFER
 623                 /* Also take the logbuffer into account (pram is in kB) */
 624                 pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
 625 #endif
 626                 sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
 627                 setenv ("mem", memsz);
 628         }
 629 #endif
 630
 631 #ifdef CONFIG_MODEM_SUPPORT
 632  {
 633          extern int do_mdm_init;
 634          do_mdm_init = gd->do_mdm_init;
 635  }
 636 #endif
 637
 638 #ifdef CONFIG_WATCHDOG
 639         /* disable watchdog if environment is set */
 640         if ((s = getenv ("watchdog")) != NULL) {
 641                 if (strncmp (s, "off", 3) == 0) {
 642                         WATCHDOG_DISABLE ();
 643                 }
 644         }
 645 #endif /* CONFIG_WATCHDOG*/
 646
 647
 648         /* Initialization complete - start the monitor */
 649
 650         /* main_loop() can return to retry autoboot, if so just run it again. */
 651         for (;;) {
 652                 WATCHDOG_RESET ();
 653                 main_loop ();
 654         }
 655
 656         /* NOTREACHED - no way out of command loop except booting */
 657 }