board/zeus/zeus.c

   1 /*
   2  * (C) Copyright 2007
   3  * Stefan Roese, DENX Software Engineering, sr@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <malloc.h>
  27 #include <environment.h>
  28 #include <logbuff.h>
  29 #include <post.h>
  30
  31 #include <asm/processor.h>
  32 #include <asm/io.h>
  33 #include <asm/gpio.h>
  34
  35 DECLARE_GLOBAL_DATA_PTR;
  36
  37 #define REBOOT_MAGIC    0x07081967
  38 #define REBOOT_NOP      0x00000000
  39 #define REBOOT_DO_POST  0x00000001
  40
  41 extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips    */
  42 extern env_t *env_ptr;
  43 extern uchar default_environment[];
  44
  45 ulong flash_get_size(ulong base, int banknum);
  46 void env_crc_update(void);
  47 int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  48
  49 static u32 start_time;
  50
  51 int board_early_init_f(void)
  52 {
  53         mtdcr(uicsr, 0xFFFFFFFF);       /* clear all ints */
  54         mtdcr(uicer, 0x00000000);       /* disable all ints */
  55         mtdcr(uiccr, 0x00000000);
  56         mtdcr(uicpr, 0xFFFF7F00);       /* set int polarities */
  57         mtdcr(uictr, 0x00000000);       /* set int trigger levels */
  58         mtdcr(uicsr, 0xFFFFFFFF);       /* clear all ints */
  59         mtdcr(uicvcr, 0x00000001);      /* set vect base=0,INT0 highest priority */
  60
  61         /*
  62          * Configure CPC0_PCI to enable PerWE as output
  63          */
  64         mtdcr(cpc0_pci, CPC0_PCI_SPE);
  65
  66         return 0;
  67 }
  68
  69 int misc_init_r(void)
  70 {
  71         u32 pbcr;
  72         int size_val = 0;
  73         u32 post_magic;
  74         u32 post_val;
  75
  76         post_magic = in_be32((void *)CFG_POST_MAGIC);
  77         post_val = in_be32((void *)CFG_POST_VAL);
  78         if ((post_magic == REBOOT_MAGIC) && (post_val == REBOOT_DO_POST)) {
  79                 /*
  80                  * Set special bootline bootparameter to pass this POST boot
  81                  * mode to Linux to reset the username/password
  82                  */
  83                 setenv("addmisc", "setenv bootargs \\${bootargs} factory_reset=yes");
  84
  85                 /*
  86                  * Normally don't run POST tests, only when enabled
  87                  * via the sw-reset button. So disable further tests
  88                  * upon next bootup here.
  89                  */
  90                 out_be32((void *)CFG_POST_VAL, REBOOT_NOP);
  91         } else {
  92                 /*
  93                  * Only run POST when initiated via the sw-reset button mechanism
  94                  */
  95                 post_word_store(0);
  96         }
  97
  98         /*
  99          * Get current time
 100          */
 101         start_time = get_timer(0);
 102
 103         /*
 104          * FLASH stuff...
 105          */
 106
 107         /* Re-do sizing to get full correct info */
 108
 109         /* adjust flash start and offset */
 110         mfebc(pb0cr, pbcr);
 111         switch (gd->bd->bi_flashsize) {
 112         case 1 << 20:
 113                 size_val = 0;
 114                 break;
 115         case 2 << 20:
 116                 size_val = 1;
 117                 break;
 118         case 4 << 20:
 119                 size_val = 2;
 120                 break;
 121         case 8 << 20:
 122                 size_val = 3;
 123                 break;
 124         case 16 << 20:
 125                 size_val = 4;
 126                 break;
 127         case 32 << 20:
 128                 size_val = 5;
 129                 break;
 130         case 64 << 20:
 131                 size_val = 6;
 132                 break;
 133         case 128 << 20:
 134                 size_val = 7;
 135                 break;
 136         }
 137         pbcr = (pbcr & 0x0001ffff) | gd->bd->bi_flashstart | (size_val << 17);
 138         mtebc(pb0cr, pbcr);
 139
 140         /*
 141          * Re-check to get correct base address
 142          */
 143         flash_get_size(gd->bd->bi_flashstart, 0);
 144
 145         /* Monitor protection ON by default */
 146         (void)flash_protect(FLAG_PROTECT_SET,
 147                             -CFG_MONITOR_LEN,
 148                             0xffffffff,
 149                             &flash_info[0]);
 150
 151         /* Env protection ON by default */
 152         (void)flash_protect(FLAG_PROTECT_SET,
 153                             CFG_ENV_ADDR_REDUND,
 154                             CFG_ENV_ADDR_REDUND + 2*CFG_ENV_SECT_SIZE - 1,
 155                             &flash_info[0]);
 156
 157         return 0;
 158 }
 159
 160 /*
 161  * Check Board Identity:
 162  */
 163 int checkboard(void)
 164 {
 165         char *s = getenv("serial#");
 166
 167         puts("Board: Zeus-");
 168
 169         if (in_be32((void *)GPIO0_IR) & GPIO_VAL(CFG_GPIO_ZEUS_PE))
 170                 puts("PE");
 171         else
 172                 puts("CE");
 173
 174         puts(" of BulletEndPoint");
 175
 176         if (s != NULL) {
 177                 puts(", serial# ");
 178                 puts(s);
 179         }
 180         putc('\n');
 181
 182         /* both LED's off */
 183         gpio_write_bit(CFG_GPIO_LED_RED, 0);
 184         gpio_write_bit(CFG_GPIO_LED_GREEN, 0);
 185         udelay(10000);
 186         /* and on again */
 187         gpio_write_bit(CFG_GPIO_LED_RED, 1);
 188         gpio_write_bit(CFG_GPIO_LED_GREEN, 1);
 189
 190         return (0);
 191 }
 192
 193 static u32 detect_sdram_size(void)
 194 {
 195         u32 val;
 196         u32 size;
 197
 198         mfsdram(mem_mb0cf, val);
 199         size = (4 << 20) << ((val & 0x000e0000) >> 17);
 200
 201         /*
 202          * Check if 2nd bank is enabled too
 203          */
 204         mfsdram(mem_mb1cf, val);
 205         if (val & 1)
 206                 size += (4 << 20) << ((val & 0x000e0000) >> 17);
 207
 208         return size;
 209 }
 210
 211 long int initdram (int board_type)
 212 {
 213         return detect_sdram_size();
 214 }
 215
 216 #if defined(CFG_DRAM_TEST)
 217 int testdram(void)
 218 {
 219         unsigned long *mem = (unsigned long *)0;
 220         const unsigned long kend = (1024 / sizeof(unsigned long));
 221         unsigned long k, n;
 222         unsigned long msr;
 223         unsigned long total_kbytes;
 224
 225         total_kbytes = detect_sdram_size();
 226
 227         msr = mfmsr();
 228         mtmsr(msr & ~(MSR_EE));
 229
 230         for (k = 0; k < total_kbytes ;
 231              ++k, mem += (1024 / sizeof(unsigned long))) {
 232                 if ((k & 1023) == 0) {
 233                         printf("%3d MB\r", k / 1024);
 234                 }
 235
 236                 memset(mem, 0xaaaaaaaa, 1024);
 237                 for (n = 0; n < kend; ++n) {
 238                         if (mem[n] != 0xaaaaaaaa) {
 239                                 printf("SDRAM test fails at: %08x\n",
 240                                        (uint) & mem[n]);
 241                                 return 1;
 242                         }
 243                 }
 244
 245                 memset(mem, 0x55555555, 1024);
 246                 for (n = 0; n < kend; ++n) {
 247                         if (mem[n] != 0x55555555) {
 248                                 printf("SDRAM test fails at: %08x\n",
 249                                        (uint) & mem[n]);
 250                                 return 1;
 251                         }
 252                 }
 253         }
 254         printf("SDRAM test passes\n");
 255         mtmsr(msr);
 256
 257         return 0;
 258 }
 259 #endif
 260
 261 static int default_env_var(char *buf, char *var)
 262 {
 263         char *ptr;
 264         char *val;
 265
 266         /*
 267          * Find env variable
 268          */
 269         ptr = strstr(buf + 4, var);
 270         if (ptr == NULL) {
 271                 printf("ERROR: %s not found!\n", var);
 272                 return -1;
 273         }
 274         ptr += strlen(var) + 1;
 275
 276         /*
 277          * Now the ethaddr needs to be updated in the "normal"
 278          * environment storage -> redundant flash.
 279          */
 280         val = ptr;
 281         setenv(var, val);
 282         printf("Updated %s from eeprom to %s!\n", var, val);
 283
 284         return 0;
 285 }
 286
 287 static int restore_default(void)
 288 {
 289         char *buf;
 290         char *buf_save;
 291         u32 crc;
 292
 293         /*
 294          * Unprotect and erase environment area
 295          */
 296         flash_protect(FLAG_PROTECT_CLEAR,
 297                       CFG_ENV_ADDR_REDUND,
 298                       CFG_ENV_ADDR_REDUND + 2*CFG_ENV_SECT_SIZE - 1,
 299                       &flash_info[0]);
 300
 301         flash_sect_erase(CFG_ENV_ADDR_REDUND,
 302                          CFG_ENV_ADDR_REDUND + 2*CFG_ENV_SECT_SIZE - 1);
 303
 304         /*
 305          * Now restore default environment from U-Boot image
 306          * -> ipaddr, serverip...
 307          */
 308         memset(env_ptr, 0, sizeof(env_t));
 309         memcpy(env_ptr->data, default_environment, ENV_SIZE);
 310 #ifdef CFG_REDUNDAND_ENVIRONMENT
 311         env_ptr->flags = 0xFF;
 312 #endif
 313         env_crc_update();
 314         gd->env_valid = 1;
 315
 316         /*
 317          * Read board specific values from I2C EEPROM
 318          * and set env variables accordingly
 319          * -> ethaddr, eth1addr, serial#
 320          */
 321         buf = buf_save = malloc(FACTORY_RESET_ENV_SIZE);
 322         if (eeprom_read(FACTORY_RESET_I2C_EEPROM, FACTORY_RESET_ENV_OFFS,
 323                         (u8 *)buf, FACTORY_RESET_ENV_SIZE)) {
 324                 puts("\nError reading EEPROM!\n");
 325         } else {
 326                 crc = crc32(0, (u8 *)(buf + 4), FACTORY_RESET_ENV_SIZE - 4);
 327                 if (crc != *(u32 *)buf) {
 328                         printf("ERROR: crc mismatch %08lx %08lx\n", crc, *(u32 *)buf);
 329                         return -1;
 330                 }
 331
 332                 default_env_var(buf, "ethaddr");
 333                 buf += 8 + 18;
 334                 default_env_var(buf, "eth1addr");
 335                 buf += 9 + 18;
 336                 default_env_var(buf, "serial#");
 337         }
 338
 339         /*
 340          * Finally save updated env variables back to flash
 341          */
 342         saveenv();
 343
 344         free(buf_save);
 345
 346         return 0;
 347 }
 348
 349 int do_set_default(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 350 {
 351         char *buf;
 352         char *buf_save;
 353         char str[32];
 354         u32 crc;
 355         char var[32];
 356
 357         if (argc < 4) {
 358                 puts("ERROR!\n");
 359                 return -1;
 360         }
 361
 362         buf = buf_save = malloc(FACTORY_RESET_ENV_SIZE);
 363         memset(buf, 0, FACTORY_RESET_ENV_SIZE);
 364
 365         strcpy(var, "ethaddr");
 366         printf("Setting %s to %s\n", var, argv[1]);
 367         sprintf(str, "%s=%s", var, argv[1]);
 368         strcpy(buf + 4, str);
 369         buf += strlen(str) + 1;
 370
 371         strcpy(var, "eth1addr");
 372         printf("Setting %s to %s\n", var, argv[2]);
 373         sprintf(str, "%s=%s", var, argv[2]);
 374         strcpy(buf + 4, str);
 375         buf += strlen(str) + 1;
 376
 377         strcpy(var, "serial#");
 378         printf("Setting %s to %s\n", var, argv[3]);
 379         sprintf(str, "%s=%s", var, argv[3]);
 380         strcpy(buf + 4, str);
 381
 382         crc = crc32(0, (u8 *)(buf_save + 4), FACTORY_RESET_ENV_SIZE - 4);
 383         *(u32 *)buf_save = crc;
 384
 385         if (eeprom_write(FACTORY_RESET_I2C_EEPROM, FACTORY_RESET_ENV_OFFS,
 386                          (u8 *)buf_save, FACTORY_RESET_ENV_SIZE)) {
 387                 puts("\nError writing EEPROM!\n");
 388                 return -1;
 389         }
 390
 391         free(buf_save);
 392
 393         return 0;
 394 }
 395
 396 U_BOOT_CMD(
 397         setdef, 4,      1,      do_set_default,
 398         "setdef  - write board-specific values to EEPROM (ethaddr...)\n",
 399         "ethaddr eth1addr serial#\n    - write board-specific values to EEPROM\n"
 400         );
 401
 402 static inline int sw_reset_pressed(void)
 403 {
 404         return !(in_be32((void *)GPIO0_IR) & GPIO_VAL(CFG_GPIO_SW_RESET));
 405 }
 406
 407 int do_chkreset(cmd_tbl_t* cmdtp, int flag, int argc, char* argv[])
 408 {
 409         int delta;
 410         int count = 0;
 411         int post = 0;
 412         int factory_reset = 0;
 413
 414         if (!sw_reset_pressed()) {
 415                 printf("SW-Reset already high (Button released)\n");
 416                 printf("-> No action taken!\n");
 417                 return 0;
 418         }
 419
 420         printf("Waiting for SW-Reset button to be released.");
 421
 422         while (1) {
 423                 delta = get_timer(start_time);
 424                 if (!sw_reset_pressed())
 425                         break;
 426
 427                 if ((delta > CFG_TIME_POST) && !post) {
 428                         printf("\nWhen released now, POST tests will be started.");
 429                         gpio_write_bit(CFG_GPIO_LED_GREEN, 0);
 430                         post = 1;
 431                 }
 432
 433                 if ((delta > CFG_TIME_FACTORY_RESET) && !factory_reset) {
 434                         printf("\nWhen released now, factory default values"
 435                                " will be restored.");
 436                         gpio_write_bit(CFG_GPIO_LED_RED, 0);
 437                         factory_reset = 1;
 438                 }
 439
 440                 udelay(1000);
 441                 if (!(count++ % 1000))
 442                         printf(".");
 443         }
 444
 445
 446         printf("\nSW-Reset Button released after %d milli-seconds!\n", delta);
 447
 448         if (delta > CFG_TIME_FACTORY_RESET) {
 449                 printf("Starting factory reset value restoration...\n");
 450
 451                 /*
 452                  * Restore default setting
 453                  */
 454                 restore_default();
 455
 456                 /*
 457                  * Reset the board for default to become valid
 458                  */
 459                 do_reset(NULL, 0, 0, NULL);
 460
 461                 return 0;
 462         }
 463
 464         if (delta > CFG_TIME_POST) {
 465                 printf("Starting POST configuration...\n");
 466
 467                 /*
 468                  * Enable POST upon next bootup
 469                  */
 470                 out_be32((void *)CFG_POST_MAGIC, REBOOT_MAGIC);
 471                 out_be32((void *)CFG_POST_VAL, REBOOT_DO_POST);
 472                 post_bootmode_init();
 473
 474                 /*
 475                  * Reset the logbuffer for a clean start
 476                  */
 477                 logbuff_reset();
 478
 479                 do_reset(NULL, 0, 0, NULL);
 480
 481                 return 0;
 482         }
 483
 484         return 0;
 485 }
 486
 487 U_BOOT_CMD (
 488         chkreset, 1, 1, do_chkreset,
 489         "chkreset- Check for status of SW-reset button and act accordingly\n",
 490         NULL
 491 );
 492
 493 #if defined(CONFIG_POST)
 494 /*
 495  * Returns 1 if keys pressed to start the power-on long-running tests
 496  * Called from board_init_f().
 497  */
 498 int post_hotkeys_pressed(void)
 499 {
 500         u32 post_magic;
 501         u32 post_val;
 502
 503         post_magic = in_be32((void *)CFG_POST_MAGIC);
 504         post_val = in_be32((void *)CFG_POST_VAL);
 505
 506         if ((post_magic == REBOOT_MAGIC) && (post_val == REBOOT_DO_POST))
 507                 return 1;
 508         else
 509                 return 0;
 510 }
 511 #endif /* CONFIG_POST */