arch/blackfin/lib/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 <stdio_dev.h>
  15 #include <environment.h>
  16 #include <malloc.h>
  17 #include <mmc.h>
  18 #include <net.h>
  19 #include <timestamp.h>
  20 #include <status_led.h>
  21 #include <version.h>
  22
  23 #include <asm/cplb.h>
  24 #include <asm/mach-common/bits/mpu.h>
  25 #include <kgdb.h>
  26
  27 #ifdef CONFIG_CMD_NAND
  28 #include <nand.h>       /* cannot even include nand.h if it isnt configured */
  29 #endif
  30
  31 #ifdef CONFIG_BITBANGMII
  32 #include <miiphy.h>
  33 #endif
  34
  35 #if defined(CONFIG_POST)
  36 #include <post.h>
  37 int post_flag;
  38 #endif
  39
  40 DECLARE_GLOBAL_DATA_PTR;
  41
  42 const char version_string[] = U_BOOT_VERSION " ("U_BOOT_DATE" - "U_BOOT_TIME")";
  43
  44 __attribute__((always_inline))
  45 static inline void serial_early_puts(const char *s)
  46 {
  47 #ifdef CONFIG_DEBUG_EARLY_SERIAL
  48         serial_puts("Early: ");
  49         serial_puts(s);
  50 #endif
  51 }
  52
  53 static int display_banner(void)
  54 {
  55         printf("\n\n%s\n\n", version_string);
  56         printf("CPU:   ADSP %s "
  57                 "(Detected Rev: 0.%d) "
  58                 "(%s boot)\n",
  59                 gd->bd->bi_cpu,
  60                 bfin_revid(),
  61                 get_bfin_boot_mode(CONFIG_BFIN_BOOT_MODE));
  62         return 0;
  63 }
  64
  65 static int init_baudrate(void)
  66 {
  67         char baudrate[15];
  68         int i = getenv_f("baudrate", baudrate, sizeof(baudrate));
  69         gd->bd->bi_baudrate = gd->baudrate = (i > 0)
  70             ? simple_strtoul(baudrate, NULL, 10)
  71             : CONFIG_BAUDRATE;
  72         return 0;
  73 }
  74
  75 static void display_global_data(void)
  76 {
  77         bd_t *bd;
  78
  79 #ifndef CONFIG_DEBUG_EARLY_SERIAL
  80         return;
  81 #endif
  82
  83         bd = gd->bd;
  84         printf(" gd: %p\n", gd);
  85         printf(" |-flags: %lx\n", gd->flags);
  86         printf(" |-board_type: %lx\n", gd->board_type);
  87         printf(" |-baudrate: %lu\n", gd->baudrate);
  88         printf(" |-have_console: %lx\n", gd->have_console);
  89         printf(" |-ram_size: %lx\n", gd->ram_size);
  90         printf(" |-env_addr: %lx\n", gd->env_addr);
  91         printf(" |-env_valid: %lx\n", gd->env_valid);
  92         printf(" |-jt(%p): %p\n", gd->jt, *(gd->jt));
  93         printf(" \\-bd: %p\n", gd->bd);
  94         printf("   |-bi_baudrate: %x\n", bd->bi_baudrate);
  95         printf("   |-bi_ip_addr: %lx\n", bd->bi_ip_addr);
  96         printf("   |-bi_boot_params: %lx\n", bd->bi_boot_params);
  97         printf("   |-bi_memstart: %lx\n", bd->bi_memstart);
  98         printf("   |-bi_memsize: %lx\n", bd->bi_memsize);
  99         printf("   |-bi_flashstart: %lx\n", bd->bi_flashstart);
 100         printf("   |-bi_flashsize: %lx\n", bd->bi_flashsize);
 101         printf("   \\-bi_flashoffset: %lx\n", bd->bi_flashoffset);
 102 }
 103
 104 #define CPLB_PAGE_SIZE (4 * 1024 * 1024)
 105 #define CPLB_PAGE_MASK (~(CPLB_PAGE_SIZE - 1))
 106 void init_cplbtables(void)
 107 {
 108         volatile uint32_t *ICPLB_ADDR, *ICPLB_DATA;
 109         volatile uint32_t *DCPLB_ADDR, *DCPLB_DATA;
 110         uint32_t extern_memory;
 111         size_t i;
 112
 113         void icplb_add(uint32_t addr, uint32_t data)
 114         {
 115                 *(ICPLB_ADDR + i) = addr;
 116                 *(ICPLB_DATA + i) = data;
 117         }
 118         void dcplb_add(uint32_t addr, uint32_t data)
 119         {
 120                 *(DCPLB_ADDR + i) = addr;
 121                 *(DCPLB_DATA + i) = data;
 122         }
 123
 124         /* populate a few common entries ... we'll let
 125          * the memory map and cplb exception handler do
 126          * the rest of the work.
 127          */
 128         i = 0;
 129         ICPLB_ADDR = (uint32_t *)ICPLB_ADDR0;
 130         ICPLB_DATA = (uint32_t *)ICPLB_DATA0;
 131         DCPLB_ADDR = (uint32_t *)DCPLB_ADDR0;
 132         DCPLB_DATA = (uint32_t *)DCPLB_DATA0;
 133
 134         icplb_add(0xFFA00000, L1_IMEMORY);
 135         dcplb_add(0xFF800000, L1_DMEMORY);
 136         ++i;
 137
 138         if (CONFIG_MEM_SIZE) {
 139                 uint32_t mbase = CONFIG_SYS_MONITOR_BASE;
 140                 uint32_t mend  = mbase + CONFIG_SYS_MONITOR_LEN;
 141                 mbase &= CPLB_PAGE_MASK;
 142                 mend &= CPLB_PAGE_MASK;
 143
 144                 icplb_add(mbase, SDRAM_IKERNEL);
 145                 dcplb_add(mbase, SDRAM_DKERNEL);
 146                 ++i;
 147
 148                 /*
 149                  * If the monitor crosses a 4 meg boundary, we'll need
 150                  * to lock two entries for it.  We assume it doesn't
 151                  * cross two 4 meg boundaries ...
 152                  */
 153                 if (mbase != mend) {
 154                         icplb_add(mend, SDRAM_IKERNEL);
 155                         dcplb_add(mend, SDRAM_DKERNEL);
 156                         ++i;
 157                 }
 158         }
 159
 160         icplb_add(0x20000000, SDRAM_INON_CHBL);
 161         dcplb_add(0x20000000, SDRAM_EBIU);
 162         ++i;
 163
 164         /* Add entries for the rest of external RAM up to the bootrom */
 165         extern_memory = 0;
 166
 167 #ifdef CONFIG_DEBUG_NULL_PTR
 168         icplb_add(extern_memory, (SDRAM_IKERNEL & ~PAGE_SIZE_MASK) | PAGE_SIZE_1KB);
 169         dcplb_add(extern_memory, (SDRAM_DKERNEL & ~PAGE_SIZE_MASK) | PAGE_SIZE_1KB);
 170         ++i;
 171         icplb_add(extern_memory, SDRAM_IKERNEL);
 172         dcplb_add(extern_memory, SDRAM_DKERNEL);
 173         extern_memory += CPLB_PAGE_SIZE;
 174         ++i;
 175 #endif
 176
 177         while (i < 16 && extern_memory < (CONFIG_SYS_MONITOR_BASE & CPLB_PAGE_MASK)) {
 178                 icplb_add(extern_memory, SDRAM_IGENERIC);
 179                 dcplb_add(extern_memory, SDRAM_DGENERIC);
 180                 extern_memory += CPLB_PAGE_SIZE;
 181                 ++i;
 182         }
 183         while (i < 16) {
 184                 icplb_add(0, 0);
 185                 dcplb_add(0, 0);
 186                 ++i;
 187         }
 188 }
 189
 190 /*
 191  * All attempts to come up with a "common" initialization sequence
 192  * that works for all boards and architectures failed: some of the
 193  * requirements are just _too_ different. To get rid of the resulting
 194  * mess of board dependend #ifdef'ed code we now make the whole
 195  * initialization sequence configurable to the user.
 196  *
 197  * The requirements for any new initalization function is simple: it
 198  * receives a pointer to the "global data" structure as it's only
 199  * argument, and returns an integer return code, where 0 means
 200  * "continue" and != 0 means "fatal error, hang the system".
 201  */
 202
 203 extern int watchdog_init(void);
 204 extern int exception_init(void);
 205 extern int irq_init(void);
 206 extern int timer_init(void);
 207
 208 void board_init_f(ulong bootflag)
 209 {
 210         ulong addr;
 211         bd_t *bd;
 212         char buf[32];
 213
 214 #ifdef CONFIG_BOARD_EARLY_INIT_F
 215         serial_early_puts("Board early init flash\n");
 216         board_early_init_f();
 217 #endif
 218
 219         serial_early_puts("Init CPLB tables\n");
 220         init_cplbtables();
 221
 222         serial_early_puts("Exceptions setup\n");
 223         exception_init();
 224
 225 #ifndef CONFIG_ICACHE_OFF
 226         serial_early_puts("Turn on ICACHE\n");
 227         icache_enable();
 228 #endif
 229 #ifndef CONFIG_DCACHE_OFF
 230         serial_early_puts("Turn on DCACHE\n");
 231         dcache_enable();
 232 #endif
 233
 234 #ifdef CONFIG_WATCHDOG
 235         serial_early_puts("Setting up external watchdog\n");
 236         watchdog_init();
 237 #endif
 238
 239 #ifdef DEBUG
 240         if (CONFIG_SYS_GBL_DATA_SIZE < sizeof(*gd))
 241                 hang();
 242 #endif
 243         serial_early_puts("Init global data\n");
 244         gd = (gd_t *) (CONFIG_SYS_GBL_DATA_ADDR);
 245         memset((void *)gd, 0, CONFIG_SYS_GBL_DATA_SIZE);
 246
 247         /* Board data initialization */
 248         addr = (CONFIG_SYS_GBL_DATA_ADDR + sizeof(gd_t));
 249
 250         /* Align to 4 byte boundary */
 251         addr &= ~(4 - 1);
 252         bd = (bd_t *) addr;
 253         gd->bd = bd;
 254         memset((void *)bd, 0, sizeof(bd_t));
 255
 256         bd->bi_r_version = version_string;
 257         bd->bi_cpu = MK_STR(CONFIG_BFIN_CPU);
 258         bd->bi_board_name = BFIN_BOARD_NAME;
 259         bd->bi_vco = get_vco();
 260         bd->bi_cclk = get_cclk();
 261         bd->bi_sclk = get_sclk();
 262         bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
 263         bd->bi_memsize = CONFIG_SYS_MAX_RAM_SIZE;
 264
 265         /* Initialize */
 266         serial_early_puts("IRQ init\n");
 267         irq_init();
 268         serial_early_puts("Environment init\n");
 269         env_init();
 270         serial_early_puts("Baudrate init\n");
 271         init_baudrate();
 272         serial_early_puts("Serial init\n");
 273         serial_init();
 274         serial_early_puts("Console init flash\n");
 275         console_init_f();
 276         serial_early_puts("End of early debugging\n");
 277         display_banner();
 278
 279         checkboard();
 280         timer_init();
 281
 282         printf("Clock: VCO: %s MHz, ", strmhz(buf, get_vco()));
 283         printf("Core: %s MHz, ", strmhz(buf, get_cclk()));
 284         printf("System: %s MHz\n", strmhz(buf, get_sclk()));
 285
 286         printf("RAM:   ");
 287         print_size(bd->bi_memsize, "\n");
 288 #if defined(CONFIG_POST)
 289         post_init_f();
 290         post_bootmode_init();
 291         post_run(NULL, POST_ROM | post_bootmode_get(0));
 292 #endif
 293
 294         board_init_r((gd_t *) gd, 0x20000010);
 295 }
 296
 297 static void board_net_init_r(bd_t *bd)
 298 {
 299 #ifdef CONFIG_BITBANGMII
 300         bb_miiphy_init();
 301 #endif
 302 #ifdef CONFIG_CMD_NET
 303         char *s;
 304
 305         if ((s = getenv("bootfile")) != NULL)
 306                 copy_filename(BootFile, s, sizeof(BootFile));
 307
 308         bd->bi_ip_addr = getenv_IPaddr("ipaddr");
 309
 310         printf("Net:   ");
 311         eth_initialize(gd->bd);
 312 #endif
 313 }
 314
 315 void board_init_r(gd_t * id, ulong dest_addr)
 316 {
 317         char *s;
 318         bd_t *bd;
 319         gd = id;
 320         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 321         bd = gd->bd;
 322
 323 #if defined(CONFIG_POST)
 324         post_output_backlog();
 325         post_reloc();
 326 #endif
 327
 328         /* initialize malloc() area */
 329         mem_malloc_init(CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);
 330
 331 #if     !defined(CONFIG_SYS_NO_FLASH)
 332         /* Initialize the flash and protect u-boot by default */
 333         extern flash_info_t flash_info[];
 334         puts("Flash: ");
 335         ulong size = flash_init();
 336         print_size(size, "\n");
 337         flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_FLASH_BASE,
 338                 CONFIG_SYS_FLASH_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 339                 &flash_info[0]);
 340         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
 341         bd->bi_flashsize = size;
 342         bd->bi_flashoffset = 0;
 343 #else
 344         bd->bi_flashstart = 0;
 345         bd->bi_flashsize = 0;
 346         bd->bi_flashoffset = 0;
 347 #endif
 348
 349 #ifdef CONFIG_CMD_NAND
 350         puts("NAND:  ");
 351         nand_init();            /* go init the NAND */
 352 #endif
 353
 354 #ifdef CONFIG_GENERIC_MMC
 355         puts("MMC:  ");
 356         mmc_initialize(bd);
 357 #endif
 358
 359         /* relocate environment function pointers etc. */
 360         env_relocate();
 361
 362         /* Initialize stdio devices */
 363         stdio_init();
 364         jumptable_init();
 365
 366         /* Initialize the console (after the relocation and devices init) */
 367         console_init_r();
 368
 369 #ifdef CONFIG_CMD_KGDB
 370         puts("KGDB:  ");
 371         kgdb_init();
 372 #endif
 373
 374 #ifdef CONFIG_STATUS_LED
 375         status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
 376         status_led_set(STATUS_LED_CRASH, STATUS_LED_OFF);
 377 #endif
 378
 379         /* Initialize from environment */
 380         if ((s = getenv("loadaddr")) != NULL)
 381                 load_addr = simple_strtoul(s, NULL, 16);
 382
 383 #if defined(CONFIG_MISC_INIT_R)
 384         /* miscellaneous platform dependent initialisations */
 385         misc_init_r();
 386 #endif
 387
 388         board_net_init_r(bd);
 389
 390         display_global_data();
 391
 392 #if defined(CONFIG_POST)
 393         if (post_flag)
 394                 post_run(NULL, POST_RAM | post_bootmode_get(0));
 395 #endif
 396
 397         if (bfin_os_log_check()) {
 398                 puts("\nLog buffer from operating system:\n");
 399                 bfin_os_log_dump();
 400                 puts("\n");
 401         }
 402
 403         /* main_loop() can return to retry autoboot, if so just run it again. */
 404         for (;;)
 405                 main_loop();
 406 }
 407
 408 void hang(void)
 409 {
 410 #ifdef CONFIG_STATUS_LED
 411         status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
 412         status_led_set(STATUS_LED_CRASH, STATUS_LED_BLINKING);
 413 #endif
 414         puts("### ERROR ### Please RESET the board ###\n");
 415         while (1)
 416                 /* If a JTAG emulator is hooked up, we'll automatically trigger
 417                  * a breakpoint in it.  If one isn't, this is just a NOP.
 418                  */
 419                 asm("emuexcpt;");
 420 }