lib_arm/board.c

   1 /*
   2  * (C) Copyright 2002
   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 #include <common.h>
  29 #include <command.h>
  30 #include <malloc.h>
  31 #include <devices.h>
  32 #include <version.h>
  33 #include <net.h>
  34
  35 #ifdef CONFIG_DRIVER_SMC91111
  36 #include "../drivers/smc91111.h"
  37 #endif
  38 #ifdef CONFIG_DRIVER_LAN91C96
  39 #include "../drivers/lan91c96.h"
  40 #endif
  41
  42 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
  43 void nand_init (void);
  44 #endif
  45
  46 ulong monitor_flash_len;
  47
  48 #ifdef CONFIG_HAS_DATAFLASH
  49 extern int  AT91F_DataflashInit(void);
  50 extern void dataflash_print_info(void);
  51 #endif
  52
  53 #ifndef CONFIG_IDENT_STRING
  54 #define CONFIG_IDENT_STRING ""
  55 #endif
  56
  57 const char version_string[] =
  58         U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")"CONFIG_IDENT_STRING;
  59
  60 #ifdef CONFIG_DRIVER_CS8900
  61 extern void cs8900_get_enetaddr (uchar * addr);
  62 #endif
  63
  64 #ifdef CONFIG_DRIVER_RTL8019
  65 extern void rtl8019_get_enetaddr (uchar * addr);
  66 #endif
  67
  68 /*
  69  * Begin and End of memory area for malloc(), and current "brk"
  70  */
  71 static ulong mem_malloc_start = 0;
  72 static ulong mem_malloc_end = 0;
  73 static ulong mem_malloc_brk = 0;
  74
  75 static
  76 void mem_malloc_init (ulong dest_addr)
  77 {
  78         mem_malloc_start = dest_addr;
  79         mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
  80         mem_malloc_brk = mem_malloc_start;
  81
  82         memset ((void *) mem_malloc_start, 0,
  83                         mem_malloc_end - mem_malloc_start);
  84 }
  85
  86 void *sbrk (ptrdiff_t increment)
  87 {
  88         ulong old = mem_malloc_brk;
  89         ulong new = old + increment;
  90
  91         if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
  92                 return (NULL);
  93         }
  94         mem_malloc_brk = new;
  95
  96         return ((void *) old);
  97 }
  98
  99 /************************************************************************
 100  * Init Utilities                                                       *
 101  ************************************************************************
 102  * Some of this code should be moved into the core functions,
 103  * or dropped completely,
 104  * but let's get it working (again) first...
 105  */
 106
 107 static int init_baudrate (void)
 108 {
 109         DECLARE_GLOBAL_DATA_PTR;
 110
 111         uchar tmp[64];  /* long enough for environment variables */
 112         int i = getenv_r ("baudrate", tmp, sizeof (tmp));
 113         gd->bd->bi_baudrate = gd->baudrate = (i > 0)
 114                         ? (int) simple_strtoul (tmp, NULL, 10)
 115                         : CONFIG_BAUDRATE;
 116
 117         return (0);
 118 }
 119
 120 static int display_banner (void)
 121 {
 122         printf ("\n\n%s\n\n", version_string);
 123         printf ("U-Boot code: %08lX -> %08lX  BSS: -> %08lX\n",
 124                 _armboot_start, _bss_start, _bss_end);
 125 #ifdef CONFIG_MODEM_SUPPORT
 126         puts ("Modem Support enabled\n");
 127 #endif
 128 #ifdef CONFIG_USE_IRQ
 129         printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
 130         printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
 131 #endif
 132
 133         return (0);
 134 }
 135
 136 /*
 137  * WARNING: this code looks "cleaner" than the PowerPC version, but
 138  * has the disadvantage that you either get nothing, or everything.
 139  * On PowerPC, you might see "DRAM: " before the system hangs - which
 140  * gives a simple yet clear indication which part of the
 141  * initialization if failing.
 142  */
 143 static int display_dram_config (void)
 144 {
 145         DECLARE_GLOBAL_DATA_PTR;
 146         int i;
 147
 148         puts ("RAM Configuration:\n");
 149
 150         for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 151                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 152                 print_size (gd->bd->bi_dram[i].size, "\n");
 153         }
 154
 155         return (0);
 156 }
 157
 158 static void display_flash_config (ulong size)
 159 {
 160         puts ("Flash: ");
 161         print_size (size, "\n");
 162 }
 163
 164
 165 /*
 166  * Breathe some life into the board...
 167  *
 168  * Initialize a serial port as console, and carry out some hardware
 169  * tests.
 170  *
 171  * The first part of initialization is running from Flash memory;
 172  * its main purpose is to initialize the RAM so that we
 173  * can relocate the monitor code to RAM.
 174  */
 175
 176 /*
 177  * All attempts to come up with a "common" initialization sequence
 178  * that works for all boards and architectures failed: some of the
 179  * requirements are just _too_ different. To get rid of the resulting
 180  * mess of board dependent #ifdef'ed code we now make the whole
 181  * initialization sequence configurable to the user.
 182  *
 183  * The requirements for any new initalization function is simple: it
 184  * receives a pointer to the "global data" structure as it's only
 185  * argument, and returns an integer return code, where 0 means
 186  * "continue" and != 0 means "fatal error, hang the system".
 187  */
 188 typedef int (init_fnc_t) (void);
 189
 190 init_fnc_t *init_sequence[] = {
 191         cpu_init,               /* basic cpu dependent setup */
 192         board_init,             /* basic board dependent setup */
 193         interrupt_init,         /* set up exceptions */
 194         env_init,               /* initialize environment */
 195         init_baudrate,          /* initialze baudrate settings */
 196         serial_init,            /* serial communications setup */
 197         console_init_f,         /* stage 1 init of console */
 198         display_banner,         /* say that we are here */
 199         dram_init,              /* configure available RAM banks */
 200         display_dram_config,
 201 #if defined(CONFIG_VCMA9) || defined (CONFIG_CMC_PU2)
 202         checkboard,
 203 #endif
 204         NULL,
 205 };
 206
 207 void start_armboot (void)
 208 {
 209         DECLARE_GLOBAL_DATA_PTR;
 210
 211         ulong size;
 212         init_fnc_t **init_fnc_ptr;
 213         char *s;
 214 #if defined(CONFIG_VFD) || defined(CONFIG_LCD)
 215         unsigned long addr;
 216 #endif
 217
 218         /* Pointer is writable since we allocated a register for it */
 219         gd = (gd_t*)(_armboot_start - CFG_MALLOC_LEN - sizeof(gd_t));
 220         /* compiler optimization barrier needed for GCC >= 3.4 */
 221         __asm__ __volatile__("": : :"memory");
 222
 223         memset ((void*)gd, 0, sizeof (gd_t));
 224         gd->bd = (bd_t*)((char*)gd - sizeof(bd_t));
 225         memset (gd->bd, 0, sizeof (bd_t));
 226
 227         monitor_flash_len = _bss_start - _armboot_start;
 228
 229         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 230                 if ((*init_fnc_ptr)() != 0) {
 231                         hang ();
 232                 }
 233         }
 234
 235         /* configure available FLASH banks */
 236         size = flash_init ();
 237         display_flash_config (size);
 238
 239 #ifdef CONFIG_VFD
 240 #       ifndef PAGE_SIZE
 241 #         define PAGE_SIZE 4096
 242 #       endif
 243         /*
 244          * reserve memory for VFD display (always full pages)
 245          */
 246         /* bss_end is defined in the board-specific linker script */
 247         addr = (_bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
 248         size = vfd_setmem (addr);
 249         gd->fb_base = addr;
 250 #endif /* CONFIG_VFD */
 251
 252 #ifdef CONFIG_LCD
 253 #       ifndef PAGE_SIZE
 254 #         define PAGE_SIZE 4096
 255 #       endif
 256         /*
 257          * reserve memory for LCD display (always full pages)
 258          */
 259         /* bss_end is defined in the board-specific linker script */
 260         addr = (_bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
 261         size = lcd_setmem (addr);
 262         gd->fb_base = addr;
 263 #endif /* CONFIG_LCD */
 264
 265         /* armboot_start is defined in the board-specific linker script */
 266         mem_malloc_init (_armboot_start - CFG_MALLOC_LEN);
 267
 268 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
 269         puts ("NAND:");
 270         nand_init();            /* go init the NAND */
 271 #endif
 272
 273 #ifdef CONFIG_HAS_DATAFLASH
 274         AT91F_DataflashInit();
 275         dataflash_print_info();
 276 #endif
 277
 278         /* initialize environment */
 279         env_relocate ();
 280
 281 #ifdef CONFIG_VFD
 282         /* must do this after the framebuffer is allocated */
 283         drv_vfd_init();
 284 #endif /* CONFIG_VFD */
 285
 286         /* IP Address */
 287         gd->bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
 288
 289         /* MAC Address */
 290         {
 291                 int i;
 292                 ulong reg;
 293                 char *s, *e;
 294                 uchar tmp[64];
 295
 296                 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
 297                 s = (i > 0) ? tmp : NULL;
 298
 299                 for (reg = 0; reg < 6; ++reg) {
 300                         gd->bd->bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
 301                         if (s)
 302                                 s = (*e) ? e + 1 : e;
 303                 }
 304         }
 305
 306         devices_init ();        /* get the devices list going. */
 307
 308 #ifdef CONFIG_CMC_PU2
 309         load_sernum_ethaddr ();
 310 #endif /* CONFIG_CMC_PU2 */
 311
 312         jumptable_init ();
 313
 314         console_init_r ();      /* fully init console as a device */
 315
 316 #if defined(CONFIG_MISC_INIT_R)
 317         /* miscellaneous platform dependent initialisations */
 318         misc_init_r ();
 319 #endif
 320
 321         /* enable exceptions */
 322         enable_interrupts ();
 323
 324         /* Perform network card initialisation if necessary */
 325 #ifdef CONFIG_DRIVER_CS8900
 326         cs8900_get_enetaddr (gd->bd->bi_enetaddr);
 327 #endif
 328
 329 #if defined(CONFIG_DRIVER_SMC91111) || defined (CONFIG_DRIVER_LAN91C96)
 330         if (getenv ("ethaddr")) {
 331                 smc_set_mac_addr(gd->bd->bi_enetaddr);
 332         }
 333 #endif /* CONFIG_DRIVER_SMC91111 || CONFIG_DRIVER_LAN91C96 */
 334
 335         /* Initialize from environment */
 336         if ((s = getenv ("loadaddr")) != NULL) {
 337                 load_addr = simple_strtoul (s, NULL, 16);
 338         }
 339 #if (CONFIG_COMMANDS & CFG_CMD_NET)
 340         if ((s = getenv ("bootfile")) != NULL) {
 341                 copy_filename (BootFile, s, sizeof (BootFile));
 342         }
 343 #endif  /* CFG_CMD_NET */
 344
 345 #ifdef BOARD_LATE_INIT
 346         board_late_init ();
 347 #endif
 348 #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI)
 349         puts ("Net:   ");
 350         eth_initialize(gd->bd);
 351 #endif
 352         /* main_loop() can return to retry autoboot, if so just run it again. */
 353         for (;;) {
 354                 main_loop ();
 355         }
 356
 357         /* NOTREACHED - no way out of command loop except booting */
 358 }
 359
 360 void hang (void)
 361 {
 362         puts ("### ERROR ### Please RESET the board ###\n");
 363         for (;;);
 364 }
 365
 366 #ifdef CONFIG_MODEM_SUPPORT
 367 /* called from main loop (common/main.c) */
 368 extern void  dbg(const char *fmt, ...);
 369 int mdm_init (void)
 370 {
 371         char env_str[16];
 372         char *init_str;
 373         int i;
 374         extern char console_buffer[];
 375         static inline void mdm_readline(char *buf, int bufsiz);
 376         extern void enable_putc(void);
 377         extern int hwflow_onoff(int);
 378
 379         enable_putc(); /* enable serial_putc() */
 380
 381 #ifdef CONFIG_HWFLOW
 382         init_str = getenv("mdm_flow_control");
 383         if (init_str && (strcmp(init_str, "rts/cts") == 0))
 384                 hwflow_onoff (1);
 385         else
 386                 hwflow_onoff(-1);
 387 #endif
 388
 389         for (i = 1;;i++) {
 390                 sprintf(env_str, "mdm_init%d", i);
 391                 if ((init_str = getenv(env_str)) != NULL) {
 392                         serial_puts(init_str);
 393                         serial_puts("\n");
 394                         for(;;) {
 395                                 mdm_readline(console_buffer, CFG_CBSIZE);
 396                                 dbg("ini%d: [%s]", i, console_buffer);
 397
 398                                 if ((strcmp(console_buffer, "OK") == 0) ||
 399                                         (strcmp(console_buffer, "ERROR") == 0)) {
 400                                         dbg("ini%d: cmd done", i);
 401                                         break;
 402                                 } else /* in case we are originating call ... */
 403                                         if (strncmp(console_buffer, "CONNECT", 7) == 0) {
 404                                                 dbg("ini%d: connect", i);
 405                                                 return 0;
 406                                         }
 407                         }
 408                 } else
 409                         break; /* no init string - stop modem init */
 410
 411                 udelay(100000);
 412         }
 413
 414         udelay(100000);
 415
 416         /* final stage - wait for connect */
 417         for(;i > 1;) { /* if 'i' > 1 - wait for connection
 418                                   message from modem */
 419                 mdm_readline(console_buffer, CFG_CBSIZE);
 420                 dbg("ini_f: [%s]", console_buffer);
 421                 if (strncmp(console_buffer, "CONNECT", 7) == 0) {
 422                         dbg("ini_f: connected");
 423                         return 0;
 424                 }
 425         }
 426
 427         return 0;
 428 }
 429
 430 /* 'inline' - We have to do it fast */
 431 static inline void mdm_readline(char *buf, int bufsiz)
 432 {
 433         char c;
 434         char *p;
 435         int n;
 436
 437         n = 0;
 438         p = buf;
 439         for(;;) {
 440                 c = serial_getc();
 441
 442                 /*              dbg("(%c)", c); */
 443
 444                 switch(c) {
 445                 case '\r':
 446                         break;
 447                 case '\n':
 448                         *p = '\0';
 449                         return;
 450
 451                 default:
 452                         if(n++ > bufsiz) {
 453                                 *p = '\0';
 454                                 return; /* sanity check */
 455                         }
 456                         *p = c;
 457                         p++;
 458                         break;
 459                 }
 460         }
 461 }
 462 #endif  /* CONFIG_MODEM_SUPPORT */