lib_arm/board.c

   1 /*
   2  * (C) Copyright 2002-2006
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (C) Copyright 2002
   6  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   7  * Marius Groeger <mgroeger@sysgo.de>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /*
  29  * To match the U-Boot user interface on ARM platforms to the U-Boot
  30  * standard (as on PPC platforms), some messages with debug character
  31  * are removed from the default U-Boot build.
  32  *
  33  * Define DEBUG here if you want additional info as shown below
  34  * printed upon startup:
  35  *
  36  * U-Boot code: 00F00000 -> 00F3C774  BSS: -> 00FC3274
  37  * IRQ Stack: 00ebff7c
  38  * FIQ Stack: 00ebef7c
  39  */
  40
  41 #include <common.h>
  42 #include <command.h>
  43 #include <malloc.h>
  44 #include <devices.h>
  45 #include <version.h>
  46 #include <net.h>
  47
  48 #ifdef CONFIG_DRIVER_SMC91111
  49 #include "../drivers/smc91111.h"
  50 #endif
  51 #ifdef CONFIG_DRIVER_LAN91C96
  52 #include "../drivers/lan91c96.h"
  53 #endif
  54
  55 DECLARE_GLOBAL_DATA_PTR;
  56
  57 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
  58 void nand_init (void);
  59 #endif
  60
  61 ulong monitor_flash_len;
  62
  63 #ifdef CONFIG_HAS_DATAFLASH
  64 extern int  AT91F_DataflashInit(void);
  65 extern void dataflash_print_info(void);
  66 #endif
  67
  68 #ifndef CONFIG_IDENT_STRING
  69 #define CONFIG_IDENT_STRING ""
  70 #endif
  71
  72 const char version_string[] =
  73         U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")"CONFIG_IDENT_STRING;
  74
  75 #ifdef CONFIG_DRIVER_CS8900
  76 extern void cs8900_get_enetaddr (uchar * addr);
  77 #endif
  78
  79 #ifdef CONFIG_DRIVER_RTL8019
  80 extern void rtl8019_get_enetaddr (uchar * addr);
  81 #endif
  82
  83 /*
  84  * Begin and End of memory area for malloc(), and current "brk"
  85  */
  86 static ulong mem_malloc_start = 0;
  87 static ulong mem_malloc_end = 0;
  88 static ulong mem_malloc_brk = 0;
  89
  90 static
  91 void mem_malloc_init (ulong dest_addr)
  92 {
  93         mem_malloc_start = dest_addr;
  94         mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
  95         mem_malloc_brk = mem_malloc_start;
  96
  97         memset ((void *) mem_malloc_start, 0,
  98                         mem_malloc_end - mem_malloc_start);
  99 }
 100
 101 void *sbrk (ptrdiff_t increment)
 102 {
 103         ulong old = mem_malloc_brk;
 104         ulong new = old + increment;
 105
 106         if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
 107                 return (NULL);
 108         }
 109         mem_malloc_brk = new;
 110
 111         return ((void *) old);
 112 }
 113
 114 /************************************************************************
 115  * Init Utilities                                                       *
 116  ************************************************************************
 117  * Some of this code should be moved into the core functions,
 118  * or dropped completely,
 119  * but let's get it working (again) first...
 120  */
 121
 122 static int init_baudrate (void)
 123 {
 124         char tmp[64];   /* long enough for environment variables */
 125         int i = getenv_r ("baudrate", tmp, sizeof (tmp));
 126         gd->bd->bi_baudrate = gd->baudrate = (i > 0)
 127                         ? (int) simple_strtoul (tmp, NULL, 10)
 128                         : CONFIG_BAUDRATE;
 129
 130         return (0);
 131 }
 132
 133 static int display_banner (void)
 134 {
 135         printf ("\n\n%s\n\n", version_string);
 136         debug ("U-Boot code: %08lX -> %08lX  BSS: -> %08lX\n",
 137                _armboot_start, _bss_start, _bss_end);
 138 #ifdef CONFIG_MODEM_SUPPORT
 139         debug ("Modem Support enabled\n");
 140 #endif
 141 #ifdef CONFIG_USE_IRQ
 142         debug ("IRQ Stack: %08lx\n", IRQ_STACK_START);
 143         debug ("FIQ Stack: %08lx\n", FIQ_STACK_START);
 144 #endif
 145
 146         return (0);
 147 }
 148
 149 /*
 150  * WARNING: this code looks "cleaner" than the PowerPC version, but
 151  * has the disadvantage that you either get nothing, or everything.
 152  * On PowerPC, you might see "DRAM: " before the system hangs - which
 153  * gives a simple yet clear indication which part of the
 154  * initialization if failing.
 155  */
 156 static int display_dram_config (void)
 157 {
 158         int i;
 159
 160 #ifdef DEBUG
 161         puts ("RAM Configuration:\n");
 162
 163         for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 164                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 165                 print_size (gd->bd->bi_dram[i].size, "\n");
 166         }
 167 #else
 168         ulong size = 0;
 169
 170         for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 171                 size += gd->bd->bi_dram[i].size;
 172         }
 173         puts("DRAM:  ");
 174         print_size(size, "\n");
 175 #endif
 176
 177         return (0);
 178 }
 179
 180 #ifndef CFG_NO_FLASH
 181 static void display_flash_config (ulong size)
 182 {
 183         puts ("Flash: ");
 184         print_size (size, "\n");
 185 }
 186 #endif /* CFG_NO_FLASH */
 187
 188
 189 /*
 190  * Breathe some life into the board...
 191  *
 192  * Initialize a serial port as console, and carry out some hardware
 193  * tests.
 194  *
 195  * The first part of initialization is running from Flash memory;
 196  * its main purpose is to initialize the RAM so that we
 197  * can relocate the monitor code to RAM.
 198  */
 199
 200 /*
 201  * All attempts to come up with a "common" initialization sequence
 202  * that works for all boards and architectures failed: some of the
 203  * requirements are just _too_ different. To get rid of the resulting
 204  * mess of board dependent #ifdef'ed code we now make the whole
 205  * initialization sequence configurable to the user.
 206  *
 207  * The requirements for any new initalization function is simple: it
 208  * receives a pointer to the "global data" structure as it's only
 209  * argument, and returns an integer return code, where 0 means
 210  * "continue" and != 0 means "fatal error, hang the system".
 211  */
 212 typedef int (init_fnc_t) (void);
 213
 214 int print_cpuinfo (void); /* test-only */
 215
 216 init_fnc_t *init_sequence[] = {
 217         cpu_init,               /* basic cpu dependent setup */
 218         board_init,             /* basic board dependent setup */
 219         interrupt_init,         /* set up exceptions */
 220         env_init,               /* initialize environment */
 221         init_baudrate,          /* initialze baudrate settings */
 222         serial_init,            /* serial communications setup */
 223         console_init_f,         /* stage 1 init of console */
 224         display_banner,         /* say that we are here */
 225 #if defined(CONFIG_DISPLAY_CPUINFO)
 226         print_cpuinfo,          /* display cpu info (and speed) */
 227 #endif
 228 #if defined(CONFIG_DISPLAY_BOARDINFO)
 229         checkboard,             /* display board info */
 230 #endif
 231         dram_init,              /* configure available RAM banks */
 232         display_dram_config,
 233         NULL,
 234 };
 235
 236 void start_armboot (void)
 237 {
 238         init_fnc_t **init_fnc_ptr;
 239         char *s;
 240 #ifndef CFG_NO_FLASH
 241         ulong size;
 242 #endif
 243 #if defined(CONFIG_VFD) || defined(CONFIG_LCD)
 244         unsigned long addr;
 245 #endif
 246
 247         /* Pointer is writable since we allocated a register for it */
 248         gd = (gd_t*)(_armboot_start - CFG_MALLOC_LEN - sizeof(gd_t));
 249         /* compiler optimization barrier needed for GCC >= 3.4 */
 250         __asm__ __volatile__("": : :"memory");
 251
 252         memset ((void*)gd, 0, sizeof (gd_t));
 253         gd->bd = (bd_t*)((char*)gd - sizeof(bd_t));
 254         memset (gd->bd, 0, sizeof (bd_t));
 255
 256         monitor_flash_len = _bss_start - _armboot_start;
 257
 258         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 259                 if ((*init_fnc_ptr)() != 0) {
 260                         hang ();
 261                 }
 262         }
 263
 264 #ifndef CFG_NO_FLASH
 265         /* configure available FLASH banks */
 266         size = flash_init ();
 267         display_flash_config (size);
 268 #endif /* CFG_NO_FLASH */
 269
 270 #ifdef CONFIG_VFD
 271 #       ifndef PAGE_SIZE
 272 #         define PAGE_SIZE 4096
 273 #       endif
 274         /*
 275          * reserve memory for VFD display (always full pages)
 276          */
 277         /* bss_end is defined in the board-specific linker script */
 278         addr = (_bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
 279         size = vfd_setmem (addr);
 280         gd->fb_base = addr;
 281 #endif /* CONFIG_VFD */
 282
 283 #ifdef CONFIG_LCD
 284 #       ifndef PAGE_SIZE
 285 #         define PAGE_SIZE 4096
 286 #       endif
 287         /*
 288          * reserve memory for LCD display (always full pages)
 289          */
 290         /* bss_end is defined in the board-specific linker script */
 291         addr = (_bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
 292         size = lcd_setmem (addr);
 293         gd->fb_base = addr;
 294 #endif /* CONFIG_LCD */
 295
 296         /* armboot_start is defined in the board-specific linker script */
 297         mem_malloc_init (_armboot_start - CFG_MALLOC_LEN);
 298
 299 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
 300         puts ("NAND:  ");
 301         nand_init();            /* go init the NAND */
 302 #endif
 303
 304 #ifdef CONFIG_HAS_DATAFLASH
 305         AT91F_DataflashInit();
 306         dataflash_print_info();
 307 #endif
 308
 309         /* initialize environment */
 310         env_relocate ();
 311
 312 #ifdef CONFIG_VFD
 313         /* must do this after the framebuffer is allocated */
 314         drv_vfd_init();
 315 #endif /* CONFIG_VFD */
 316
 317         /* IP Address */
 318         gd->bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
 319
 320         /* MAC Address */
 321         {
 322                 int i;
 323                 ulong reg;
 324                 char *s, *e;
 325                 char tmp[64];
 326
 327                 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
 328                 s = (i > 0) ? tmp : NULL;
 329
 330                 for (reg = 0; reg < 6; ++reg) {
 331                         gd->bd->bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
 332                         if (s)
 333                                 s = (*e) ? e + 1 : e;
 334                 }
 335
 336 #ifdef CONFIG_HAS_ETH1
 337                 i = getenv_r ("eth1addr", tmp, sizeof (tmp));
 338                 s = (i > 0) ? tmp : NULL;
 339
 340                 for (reg = 0; reg < 6; ++reg) {
 341                         gd->bd->bi_enet1addr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
 342                         if (s)
 343                                 s = (*e) ? e + 1 : e;
 344                 }
 345 #endif
 346         }
 347
 348         devices_init ();        /* get the devices list going. */
 349
 350 #ifdef CONFIG_CMC_PU2
 351         load_sernum_ethaddr ();
 352 #endif /* CONFIG_CMC_PU2 */
 353
 354         jumptable_init ();
 355
 356         console_init_r ();      /* fully init console as a device */
 357
 358 #if defined(CONFIG_MISC_INIT_R)
 359         /* miscellaneous platform dependent initialisations */
 360         misc_init_r ();
 361 #endif
 362
 363         /* enable exceptions */
 364         enable_interrupts ();
 365
 366         /* Perform network card initialisation if necessary */
 367 #ifdef CONFIG_DRIVER_CS8900
 368         cs8900_get_enetaddr (gd->bd->bi_enetaddr);
 369 #endif
 370
 371 #if defined(CONFIG_DRIVER_SMC91111) || defined (CONFIG_DRIVER_LAN91C96)
 372         if (getenv ("ethaddr")) {
 373                 smc_set_mac_addr(gd->bd->bi_enetaddr);
 374         }
 375 #endif /* CONFIG_DRIVER_SMC91111 || CONFIG_DRIVER_LAN91C96 */
 376
 377         /* Initialize from environment */
 378         if ((s = getenv ("loadaddr")) != NULL) {
 379                 load_addr = simple_strtoul (s, NULL, 16);
 380         }
 381 #if (CONFIG_COMMANDS & CFG_CMD_NET)
 382         if ((s = getenv ("bootfile")) != NULL) {
 383                 copy_filename (BootFile, s, sizeof (BootFile));
 384         }
 385 #endif  /* CFG_CMD_NET */
 386
 387 #ifdef BOARD_LATE_INIT
 388         board_late_init ();
 389 #endif
 390 #if (CONFIG_COMMANDS & CFG_CMD_NET)
 391 #if defined(CONFIG_NET_MULTI)
 392         puts ("Net:   ");
 393 #endif
 394         eth_initialize(gd->bd);
 395 #endif
 396         /* main_loop() can return to retry autoboot, if so just run it again. */
 397         for (;;) {
 398                 main_loop ();
 399         }
 400
 401         /* NOTREACHED - no way out of command loop except booting */
 402 }
 403
 404 void hang (void)
 405 {
 406         puts ("### ERROR ### Please RESET the board ###\n");
 407         for (;;);
 408 }
 409
 410 #ifdef CONFIG_MODEM_SUPPORT
 411 static inline void mdm_readline(char *buf, int bufsiz);
 412
 413 /* called from main loop (common/main.c) */
 414 extern void  dbg(const char *fmt, ...);
 415 int mdm_init (void)
 416 {
 417         char env_str[16];
 418         char *init_str;
 419         int i;
 420         extern char console_buffer[];
 421         extern void enable_putc(void);
 422         extern int hwflow_onoff(int);
 423
 424         enable_putc(); /* enable serial_putc() */
 425
 426 #ifdef CONFIG_HWFLOW
 427         init_str = getenv("mdm_flow_control");
 428         if (init_str && (strcmp(init_str, "rts/cts") == 0))
 429                 hwflow_onoff (1);
 430         else
 431                 hwflow_onoff(-1);
 432 #endif
 433
 434         for (i = 1;;i++) {
 435                 sprintf(env_str, "mdm_init%d", i);
 436                 if ((init_str = getenv(env_str)) != NULL) {
 437                         serial_puts(init_str);
 438                         serial_puts("\n");
 439                         for(;;) {
 440                                 mdm_readline(console_buffer, CFG_CBSIZE);
 441                                 dbg("ini%d: [%s]", i, console_buffer);
 442
 443                                 if ((strcmp(console_buffer, "OK") == 0) ||
 444                                         (strcmp(console_buffer, "ERROR") == 0)) {
 445                                         dbg("ini%d: cmd done", i);
 446                                         break;
 447                                 } else /* in case we are originating call ... */
 448                                         if (strncmp(console_buffer, "CONNECT", 7) == 0) {
 449                                                 dbg("ini%d: connect", i);
 450                                                 return 0;
 451                                         }
 452                         }
 453                 } else
 454                         break; /* no init string - stop modem init */
 455
 456                 udelay(100000);
 457         }
 458
 459         udelay(100000);
 460
 461         /* final stage - wait for connect */
 462         for(;i > 1;) { /* if 'i' > 1 - wait for connection
 463                                   message from modem */
 464                 mdm_readline(console_buffer, CFG_CBSIZE);
 465                 dbg("ini_f: [%s]", console_buffer);
 466                 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
 467                         dbg("ini_f: connected");
 468                         return 0;
 469                 }
 470         }
 471
 472         return 0;
 473 }
 474
 475 /* 'inline' - We have to do it fast */
 476 static inline void mdm_readline(char *buf, int bufsiz)
 477 {
 478         char c;
 479         char *p;
 480         int n;
 481
 482         n = 0;
 483         p = buf;
 484         for(;;) {
 485                 c = serial_getc();
 486
 487                 /*              dbg("(%c)", c); */
 488
 489                 switch(c) {
 490                 case '\r':
 491                         break;
 492                 case '\n':
 493                         *p = '\0';
 494                         return;
 495
 496                 default:
 497                         if(n++ > bufsiz) {
 498                                 *p = '\0';
 499                                 return; /* sanity check */
 500                         }
 501                         *p = c;
 502                         p++;
 503                         break;
 504                 }
 505         }
 506 }
 507 #endif  /* CONFIG_MODEM_SUPPORT */