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