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