lib_blackfin/board.c

   1 /*
   2  * U-boot - board.c First C file to be called contains init routines
   3  *
   4  * Copyright (c) 2005-2008 Analog Devices Inc.
   5  *
   6  * (C) Copyright 2000-2004
   7  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   8  *
   9  * Licensed under the GPL-2 or later.
  10  */
  11
  12 #include <common.h>
  13 #include <command.h>
  14 #include <devices.h>
  15 #include <environment.h>
  16 #include <i2c.h>
  17 #include <malloc.h>
  18 #include <net.h>
  19 #include <version.h>
  20
  21 #include <asm/cplb.h>
  22 #include <asm/mach-common/bits/mpu.h>
  23
  24 #ifdef CONFIG_CMD_NAND
  25 #include <nand.h>       /* cannot even include nand.h if it isnt configured */
  26 #endif
  27
  28 #if defined(CONFIG_POST)
  29 #include <post.h>
  30 int post_flag;
  31 #endif
  32
  33 DECLARE_GLOBAL_DATA_PTR;
  34
  35 const char version_string[] = U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ")";
  36
  37 __attribute__((always_inline))
  38 static inline void serial_early_puts(const char *s)
  39 {
  40 #ifdef CONFIG_DEBUG_EARLY_SERIAL
  41         serial_puts("Early: ");
  42         serial_puts(s);
  43 #endif
  44 }
  45
  46 /* Get the input voltage */
  47 static u_long get_vco(void)
  48 {
  49         u_long msel;
  50         u_long vco;
  51
  52         msel = (*pPLL_CTL >> 9) & 0x3F;
  53         if (0 == msel)
  54                 msel = 64;
  55
  56         vco = CONFIG_CLKIN_HZ;
  57         vco >>= (1 & *pPLL_CTL);        /* DF bit */
  58         vco = msel * vco;
  59         return vco;
  60 }
  61
  62 /* Get the Core clock */
  63 u_long get_cclk(void)
  64 {
  65         u_long csel, ssel;
  66         if (*pPLL_STAT & 0x1)
  67                 return CONFIG_CLKIN_HZ;
  68
  69         ssel = *pPLL_DIV;
  70         csel = ((ssel >> 4) & 0x03);
  71         ssel &= 0xf;
  72         if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
  73                 return get_vco() / ssel;
  74         return get_vco() >> csel;
  75 }
  76
  77 /* Get the System clock */
  78 u_long get_sclk(void)
  79 {
  80         u_long ssel;
  81
  82         if (*pPLL_STAT & 0x1)
  83                 return CONFIG_CLKIN_HZ;
  84
  85         ssel = (*pPLL_DIV & 0xf);
  86
  87         return get_vco() / ssel;
  88 }
  89
  90 static void *mem_malloc_start, *mem_malloc_end, *mem_malloc_brk;
  91
  92 static void mem_malloc_init(void)
  93 {
  94         mem_malloc_start = (void *)CFG_MALLOC_BASE;
  95         mem_malloc_end = (void *)(CFG_MALLOC_BASE + CFG_MALLOC_LEN);
  96         mem_malloc_brk = mem_malloc_start;
  97         memset(mem_malloc_start, 0, mem_malloc_end - mem_malloc_start);
  98 }
  99
 100 void *sbrk(ptrdiff_t increment)
 101 {
 102         void *old = mem_malloc_brk;
 103         void *new = old + increment;
 104
 105         if (new < mem_malloc_start || new > mem_malloc_end)
 106                 return NULL;
 107
 108         mem_malloc_brk = new;
 109
 110         return old;
 111 }
 112
 113 static int display_banner(void)
 114 {
 115         printf("\n\n%s\n\n", version_string);
 116         printf("CPU:   ADSP " MK_STR(CONFIG_BFIN_CPU) " (Detected Rev: 0.%d)\n", bfin_revid());
 117         return 0;
 118 }
 119
 120 static int init_baudrate(void)
 121 {
 122         char baudrate[15];
 123         int i = getenv_r("baudrate", baudrate, sizeof(baudrate));
 124         gd->bd->bi_baudrate = gd->baudrate = (i > 0)
 125             ? simple_strtoul(baudrate, NULL, 10)
 126             : CONFIG_BAUDRATE;
 127         return 0;
 128 }
 129
 130 static void display_global_data(void)
 131 {
 132 #ifdef CONFIG_DEBUG_EARLY_SERIAL
 133         bd_t *bd;
 134         bd = gd->bd;
 135         printf(" gd: %x\n", gd);
 136         printf(" |-flags: %x\n", gd->flags);
 137         printf(" |-board_type: %x\n", gd->board_type);
 138         printf(" |-baudrate: %i\n", gd->baudrate);
 139         printf(" |-have_console: %x\n", gd->have_console);
 140         printf(" |-ram_size: %x\n", gd->ram_size);
 141         printf(" |-reloc_off: %x\n", gd->reloc_off);
 142         printf(" |-env_addr: %x\n", gd->env_addr);
 143         printf(" |-env_valid: %x\n", gd->env_valid);
 144         printf(" |-jt(%x): %x\n", gd->jt, *(gd->jt));
 145         printf(" \\-bd: %x\n", gd->bd);
 146         printf("   |-bi_baudrate: %x\n", bd->bi_baudrate);
 147         printf("   |-bi_ip_addr: %x\n", bd->bi_ip_addr);
 148         printf("   |-bi_enetaddr: %x %x %x %x %x %x\n",
 149                bd->bi_enetaddr[0], bd->bi_enetaddr[1],
 150                bd->bi_enetaddr[2], bd->bi_enetaddr[3],
 151                bd->bi_enetaddr[4], bd->bi_enetaddr[5]);
 152         printf("   |-bi_boot_params: %x\n", bd->bi_boot_params);
 153         printf("   |-bi_memstart: %x\n", bd->bi_memstart);
 154         printf("   |-bi_memsize: %x\n", bd->bi_memsize);
 155         printf("   |-bi_flashstart: %x\n", bd->bi_flashstart);
 156         printf("   |-bi_flashsize: %x\n", bd->bi_flashsize);
 157         printf("   \\-bi_flashoffset: %x\n", bd->bi_flashoffset);
 158 #endif
 159 }
 160
 161 #define CPLB_PAGE_SIZE (4 * 1024 * 1024)
 162 #define CPLB_PAGE_MASK (~(CPLB_PAGE_SIZE - 1))
 163 void init_cplbtables(void)
 164 {
 165         volatile uint32_t *ICPLB_ADDR, *ICPLB_DATA;
 166         volatile uint32_t *DCPLB_ADDR, *DCPLB_DATA;
 167         uint32_t extern_memory;
 168         size_t i;
 169
 170         void icplb_add(uint32_t addr, uint32_t data)
 171         {
 172                 *(ICPLB_ADDR + i) = addr;
 173                 *(ICPLB_DATA + i) = data;
 174         }
 175         void dcplb_add(uint32_t addr, uint32_t data)
 176         {
 177                 *(DCPLB_ADDR + i) = addr;
 178                 *(DCPLB_DATA + i) = data;
 179         }
 180
 181         /* populate a few common entries ... we'll let
 182          * the memory map and cplb exception handler do
 183          * the rest of the work.
 184          */
 185         i = 0;
 186         ICPLB_ADDR = (uint32_t *)ICPLB_ADDR0;
 187         ICPLB_DATA = (uint32_t *)ICPLB_DATA0;
 188         DCPLB_ADDR = (uint32_t *)DCPLB_ADDR0;
 189         DCPLB_DATA = (uint32_t *)DCPLB_DATA0;
 190
 191         icplb_add(0xFFA00000, L1_IMEMORY);
 192         dcplb_add(0xFF800000, L1_DMEMORY);
 193         ++i;
 194
 195         icplb_add(CFG_MONITOR_BASE & CPLB_PAGE_MASK, SDRAM_IKERNEL);
 196         dcplb_add(CFG_MONITOR_BASE & CPLB_PAGE_MASK, SDRAM_DKERNEL);
 197         ++i;
 198
 199         /* If the monitor crosses a 4 meg boundary, we'll need
 200          * to lock two entries for it.
 201          */
 202         if ((CFG_MONITOR_BASE & CPLB_PAGE_MASK) != ((CFG_MONITOR_BASE + CFG_MONITOR_LEN) & CPLB_PAGE_MASK)) {
 203                 icplb_add((CFG_MONITOR_BASE + CFG_MONITOR_LEN) & CPLB_PAGE_MASK, SDRAM_IKERNEL);
 204                 dcplb_add((CFG_MONITOR_BASE + CFG_MONITOR_LEN) & CPLB_PAGE_MASK, SDRAM_DKERNEL);
 205                 ++i;
 206         }
 207
 208         icplb_add(0x20000000, SDRAM_INON_CHBL);
 209         dcplb_add(0x20000000, SDRAM_EBIU);
 210         ++i;
 211
 212         /* Add entries for the rest of external RAM up to the bootrom */
 213         extern_memory = 0;
 214
 215 #ifdef CONFIG_DEBUG_NULL_PTR
 216         icplb_add(extern_memory, (SDRAM_IKERNEL & ~PAGE_SIZE_MASK) | PAGE_SIZE_1KB);
 217         dcplb_add(extern_memory, (SDRAM_DKERNEL & ~PAGE_SIZE_MASK) | PAGE_SIZE_1KB);
 218         ++i;
 219         icplb_add(extern_memory, SDRAM_IKERNEL);
 220         dcplb_add(extern_memory, SDRAM_DKERNEL);
 221         extern_memory += CPLB_PAGE_SIZE;
 222         ++i;
 223 #endif
 224
 225         while (i < 16 && extern_memory < (CFG_MONITOR_BASE & CPLB_PAGE_MASK)) {
 226                 icplb_add(extern_memory, SDRAM_IGENERIC);
 227                 dcplb_add(extern_memory, SDRAM_DGENERIC);
 228                 extern_memory += CPLB_PAGE_SIZE;
 229                 ++i;
 230         }
 231         while (i < 16) {
 232                 icplb_add(0, 0);
 233                 dcplb_add(0, 0);
 234                 ++i;
 235         }
 236 }
 237
 238 /*
 239  * All attempts to come up with a "common" initialization sequence
 240  * that works for all boards and architectures failed: some of the
 241  * requirements are just _too_ different. To get rid of the resulting
 242  * mess of board dependend #ifdef'ed code we now make the whole
 243  * initialization sequence configurable to the user.
 244  *
 245  * The requirements for any new initalization function is simple: it
 246  * receives a pointer to the "global data" structure as it's only
 247  * argument, and returns an integer return code, where 0 means
 248  * "continue" and != 0 means "fatal error, hang the system".
 249  */
 250
 251 extern int exception_init(void);
 252 extern int irq_init(void);
 253 extern int rtc_init(void);
 254 extern int timer_init(void);
 255
 256 void board_init_f(ulong bootflag)
 257 {
 258         ulong addr;
 259         bd_t *bd;
 260
 261 #ifdef CONFIG_BOARD_EARLY_INIT_F
 262         serial_early_puts("Board early init flash\n");
 263         board_early_init_f();
 264 #endif
 265
 266         serial_early_puts("Init CPLB tables\n");
 267         init_cplbtables();
 268
 269         serial_early_puts("Exceptions setup\n");
 270         exception_init();
 271
 272 #ifndef CONFIG_ICACHE_OFF
 273         serial_early_puts("Turn on ICACHE\n");
 274         icache_enable();
 275 #endif
 276 #ifndef CONFIG_DCACHE_OFF
 277         serial_early_puts("Turn on DCACHE\n");
 278         dcache_enable();
 279 #endif
 280
 281         serial_early_puts("Init global data\n");
 282         gd = (gd_t *) (CFG_GBL_DATA_ADDR);
 283         memset((void *)gd, 0, sizeof(gd_t));
 284
 285         /* Board data initialization */
 286         addr = (CFG_GBL_DATA_ADDR + sizeof(gd_t));
 287
 288         /* Align to 4 byte boundary */
 289         addr &= ~(4 - 1);
 290         bd = (bd_t *) addr;
 291         gd->bd = bd;
 292         memset((void *)bd, 0, sizeof(bd_t));
 293
 294         bd->bi_r_version = version_string;
 295         bd->bi_cpu = MK_STR(CONFIG_BFIN_CPU);
 296         bd->bi_board_name = BFIN_BOARD_NAME;
 297         bd->bi_vco = get_vco();
 298         bd->bi_cclk = get_cclk();
 299         bd->bi_sclk = get_sclk();
 300
 301         /* Initialize */
 302         serial_early_puts("IRQ init\n");
 303         irq_init();
 304         serial_early_puts("Environment init\n");
 305         env_init();
 306         serial_early_puts("Baudrate init\n");
 307         init_baudrate();
 308         serial_early_puts("Serial init\n");
 309         serial_init();
 310         serial_early_puts("Console init flash\n");
 311         console_init_f();
 312         serial_early_puts("End of early debugging\n");
 313         display_banner();
 314
 315         checkboard();
 316 #if defined(CONFIG_RTC_BFIN) && defined(CONFIG_CMD_DATE)
 317         rtc_init();
 318 #endif
 319         timer_init();
 320
 321         printf("Clock: VCO: %lu MHz, Core: %lu MHz, System: %lu MHz\n",
 322                get_vco() / 1000000, get_cclk() / 1000000, get_sclk() / 1000000);
 323
 324         printf("RAM:   ");
 325         print_size(initdram(0), "\n");
 326 #if defined(CONFIG_POST)
 327         post_init_f();
 328         post_bootmode_init();
 329         post_run(NULL, POST_ROM | post_bootmode_get(0));
 330 #endif
 331
 332         board_init_r((gd_t *) gd, 0x20000010);
 333 }
 334
 335 #if defined(CONFIG_SOFT_I2C) || defined(CONFIG_HARD_I2C)
 336 static int init_func_i2c(void)
 337 {
 338         puts("I2C:   ");
 339         i2c_init(CFG_I2C_SPEED, CFG_I2C_SLAVE);
 340         puts("ready\n");
 341         return (0);
 342 }
 343 #endif
 344
 345 void board_init_r(gd_t * id, ulong dest_addr)
 346 {
 347         extern void malloc_bin_reloc(void);
 348         char *s;
 349         bd_t *bd;
 350         gd = id;
 351         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 352         bd = gd->bd;
 353
 354 #if defined(CONFIG_POST)
 355         post_output_backlog();
 356         post_reloc();
 357 #endif
 358
 359 #if     !defined(CFG_NO_FLASH)
 360         /* There are some other pointer constants we must deal with */
 361         /* configure available FLASH banks */
 362         extern flash_info_t flash_info[];
 363         ulong size = flash_init();
 364         puts("Flash: ");
 365         print_size(size, "\n");
 366         flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE,
 367                       CFG_FLASH_BASE + 0x1ffff, &flash_info[0]);
 368         bd->bi_flashstart = CFG_FLASH_BASE;
 369         bd->bi_flashsize = size;
 370         bd->bi_flashoffset = 0;
 371 #else
 372         bd->bi_flashstart = 0;
 373         bd->bi_flashsize = 0;
 374         bd->bi_flashoffset = 0;
 375 #endif
 376         /* initialize malloc() area */
 377         mem_malloc_init();
 378         malloc_bin_reloc();
 379
 380 #ifdef CONFIG_SPI
 381 # if ! defined(CFG_ENV_IS_IN_EEPROM)
 382         spi_init_f();
 383 # endif
 384         spi_init_r();
 385 #endif
 386
 387         /* relocate environment function pointers etc. */
 388         env_relocate();
 389
 390 #ifdef CONFIG_CMD_NET
 391         /* board MAC address */
 392         s = getenv("ethaddr");
 393         if (s == NULL) {
 394 # ifndef CONFIG_ETHADDR
 395 #  if 0
 396                 if (!board_get_enetaddr(bd->bi_enetaddr)) {
 397                         char nid[20];
 398                         sprintf(nid, "%02X:%02X:%02X:%02X:%02X:%02X",
 399                                 bd->bi_enetaddr[0], bd->bi_enetaddr[1],
 400                                 bd->bi_enetaddr[2], bd->bi_enetaddr[3],
 401                                 bd->bi_enetaddr[4], bd->bi_enetaddr[5]);
 402                         setenv("ethaddr", nid);
 403                 }
 404 #  endif
 405 # endif
 406         } else {
 407                 int i;
 408                 char *e;
 409                 for (i = 0; i < 6; ++i) {
 410                         bd->bi_enetaddr[i] = simple_strtoul(s, &e, 16);
 411                         s = (*e) ? e + 1 : e;
 412                 }
 413         }
 414
 415         /* IP Address */
 416         bd->bi_ip_addr = getenv_IPaddr("ipaddr");
 417 #endif
 418
 419         /* Initialize devices */
 420         devices_init();
 421         jumptable_init();
 422
 423         /* Initialize the console (after the relocation and devices init) */
 424         console_init_r();
 425
 426         /* Initialize from environment */
 427         if ((s = getenv("loadaddr")) != NULL)
 428                 load_addr = simple_strtoul(s, NULL, 16);
 429 #ifdef CONFIG_CMD_NET
 430         if ((s = getenv("bootfile")) != NULL)
 431                 copy_filename(BootFile, s, sizeof(BootFile));
 432 #endif
 433
 434 #ifdef CONFIG_CMD_NAND
 435         puts("NAND:  ");
 436         nand_init();            /* go init the NAND */
 437 #endif
 438
 439 #if defined(CONFIG_MISC_INIT_R)
 440         /* miscellaneous platform dependent initialisations */
 441         misc_init_r();
 442 #endif
 443
 444 #ifdef CONFIG_CMD_NET
 445         printf("Net:   ");
 446         eth_initialize(gd->bd);
 447         if (getenv("ethaddr"))
 448                 printf("MAC:   %02X:%02X:%02X:%02X:%02X:%02X\n",
 449                         bd->bi_enetaddr[0], bd->bi_enetaddr[1], bd->bi_enetaddr[2],
 450                         bd->bi_enetaddr[3], bd->bi_enetaddr[4], bd->bi_enetaddr[5]);
 451 #endif
 452
 453 #if defined(CONFIG_SOFT_I2C) || defined(CONFIG_HARD_I2C)
 454         init_func_i2c();
 455 #endif
 456
 457         display_global_data();
 458
 459 #if defined(CONFIG_POST)
 460         if (post_flag)
 461                 post_run(NULL, POST_RAM | post_bootmode_get(0));
 462 #endif
 463
 464         /* main_loop() can return to retry autoboot, if so just run it again. */
 465         for (;;)
 466                 main_loop();
 467 }
 468
 469 void hang(void)
 470 {
 471         puts("### ERROR ### Please RESET the board ###\n");
 472         while (1)
 473                 /* If a JTAG emulator is hooked up, we'll automatically trigger
 474                  * a breakpoint in it.  If one isn't, this is just a NOP.
 475                  */
 476                 asm("emuexcpt;");
 477 }