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