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                             CONFIG_ENV_ADDR_REDUND,
 154                             CONFIG_ENV_ADDR_REDUND + 2*CONFIG_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 phys_size_t initdram (int board_type)
 212 {
 213         return detect_sdram_size();
 214 }
 215
 216 static int default_env_var(char *buf, char *var)
 217 {
 218         char *ptr;
 219         char *val;
 220
 221         /*
 222          * Find env variable
 223          */
 224         ptr = strstr(buf + 4, var);
 225         if (ptr == NULL) {
 226                 printf("ERROR: %s not found!\n", var);
 227                 return -1;
 228         }
 229         ptr += strlen(var) + 1;
 230
 231         /*
 232          * Now the ethaddr needs to be updated in the "normal"
 233          * environment storage -> redundant flash.
 234          */
 235         val = ptr;
 236         setenv(var, val);
 237         printf("Updated %s from eeprom to %s!\n", var, val);
 238
 239         return 0;
 240 }
 241
 242 static int restore_default(void)
 243 {
 244         char *buf;
 245         char *buf_save;
 246         u32 crc;
 247
 248         /*
 249          * Unprotect and erase environment area
 250          */
 251         flash_protect(FLAG_PROTECT_CLEAR,
 252                       CONFIG_ENV_ADDR_REDUND,
 253                       CONFIG_ENV_ADDR_REDUND + 2*CONFIG_ENV_SECT_SIZE - 1,
 254                       &flash_info[0]);
 255
 256         flash_sect_erase(CONFIG_ENV_ADDR_REDUND,
 257                          CONFIG_ENV_ADDR_REDUND + 2*CONFIG_ENV_SECT_SIZE - 1);
 258
 259         /*
 260          * Now restore default environment from U-Boot image
 261          * -> ipaddr, serverip...
 262          */
 263         memset(env_ptr, 0, sizeof(env_t));
 264         memcpy(env_ptr->data, default_environment, ENV_SIZE);
 265 #ifdef CFG_REDUNDAND_ENVIRONMENT
 266         env_ptr->flags = 0xFF;
 267 #endif
 268         env_crc_update();
 269         gd->env_valid = 1;
 270
 271         /*
 272          * Read board specific values from I2C EEPROM
 273          * and set env variables accordingly
 274          * -> ethaddr, eth1addr, serial#
 275          */
 276         buf = buf_save = malloc(FACTORY_RESET_ENV_SIZE);
 277         if (eeprom_read(FACTORY_RESET_I2C_EEPROM, FACTORY_RESET_ENV_OFFS,
 278                         (u8 *)buf, FACTORY_RESET_ENV_SIZE)) {
 279                 puts("\nError reading EEPROM!\n");
 280         } else {
 281                 crc = crc32(0, (u8 *)(buf + 4), FACTORY_RESET_ENV_SIZE - 4);
 282                 if (crc != *(u32 *)buf) {
 283                         printf("ERROR: crc mismatch %08x %08x\n", crc, *(u32 *)buf);
 284                         return -1;
 285                 }
 286
 287                 default_env_var(buf, "ethaddr");
 288                 buf += 8 + 18;
 289                 default_env_var(buf, "eth1addr");
 290                 buf += 9 + 18;
 291                 default_env_var(buf, "serial#");
 292         }
 293
 294         /*
 295          * Finally save updated env variables back to flash
 296          */
 297         saveenv();
 298
 299         free(buf_save);
 300
 301         return 0;
 302 }
 303
 304 int do_set_default(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 305 {
 306         char *buf;
 307         char *buf_save;
 308         char str[32];
 309         u32 crc;
 310         char var[32];
 311
 312         if (argc < 4) {
 313                 puts("ERROR!\n");
 314                 return -1;
 315         }
 316
 317         buf = buf_save = malloc(FACTORY_RESET_ENV_SIZE);
 318         memset(buf, 0, FACTORY_RESET_ENV_SIZE);
 319
 320         strcpy(var, "ethaddr");
 321         printf("Setting %s to %s\n", var, argv[1]);
 322         sprintf(str, "%s=%s", var, argv[1]);
 323         strcpy(buf + 4, str);
 324         buf += strlen(str) + 1;
 325
 326         strcpy(var, "eth1addr");
 327         printf("Setting %s to %s\n", var, argv[2]);
 328         sprintf(str, "%s=%s", var, argv[2]);
 329         strcpy(buf + 4, str);
 330         buf += strlen(str) + 1;
 331
 332         strcpy(var, "serial#");
 333         printf("Setting %s to %s\n", var, argv[3]);
 334         sprintf(str, "%s=%s", var, argv[3]);
 335         strcpy(buf + 4, str);
 336
 337         crc = crc32(0, (u8 *)(buf_save + 4), FACTORY_RESET_ENV_SIZE - 4);
 338         *(u32 *)buf_save = crc;
 339
 340         if (eeprom_write(FACTORY_RESET_I2C_EEPROM, FACTORY_RESET_ENV_OFFS,
 341                          (u8 *)buf_save, FACTORY_RESET_ENV_SIZE)) {
 342                 puts("\nError writing EEPROM!\n");
 343                 return -1;
 344         }
 345
 346         free(buf_save);
 347
 348         return 0;
 349 }
 350
 351 U_BOOT_CMD(
 352         setdef, 4,      1,      do_set_default,
 353         "setdef  - write board-specific values to EEPROM (ethaddr...)\n",
 354         "ethaddr eth1addr serial#\n    - write board-specific values to EEPROM\n"
 355         );
 356
 357 static inline int sw_reset_pressed(void)
 358 {
 359         return !(in_be32((void *)GPIO0_IR) & GPIO_VAL(CFG_GPIO_SW_RESET));
 360 }
 361
 362 int do_chkreset(cmd_tbl_t* cmdtp, int flag, int argc, char* argv[])
 363 {
 364         int delta;
 365         int count = 0;
 366         int post = 0;
 367         int factory_reset = 0;
 368
 369         if (!sw_reset_pressed()) {
 370                 printf("SW-Reset already high (Button released)\n");
 371                 printf("-> No action taken!\n");
 372                 return 0;
 373         }
 374
 375         printf("Waiting for SW-Reset button to be released.");
 376
 377         while (1) {
 378                 delta = get_timer(start_time);
 379                 if (!sw_reset_pressed())
 380                         break;
 381
 382                 if ((delta > CFG_TIME_POST) && !post) {
 383                         printf("\nWhen released now, POST tests will be started.");
 384                         gpio_write_bit(CFG_GPIO_LED_GREEN, 0);
 385                         post = 1;
 386                 }
 387
 388                 if ((delta > CFG_TIME_FACTORY_RESET) && !factory_reset) {
 389                         printf("\nWhen released now, factory default values"
 390                                " will be restored.");
 391                         gpio_write_bit(CFG_GPIO_LED_RED, 0);
 392                         factory_reset = 1;
 393                 }
 394
 395                 udelay(1000);
 396                 if (!(count++ % 1000))
 397                         printf(".");
 398         }
 399
 400
 401         printf("\nSW-Reset Button released after %d milli-seconds!\n", delta);
 402
 403         if (delta > CFG_TIME_FACTORY_RESET) {
 404                 printf("Starting factory reset value restoration...\n");
 405
 406                 /*
 407                  * Restore default setting
 408                  */
 409                 restore_default();
 410
 411                 /*
 412                  * Reset the board for default to become valid
 413                  */
 414                 do_reset(NULL, 0, 0, NULL);
 415
 416                 return 0;
 417         }
 418
 419         if (delta > CFG_TIME_POST) {
 420                 printf("Starting POST configuration...\n");
 421
 422                 /*
 423                  * Enable POST upon next bootup
 424                  */
 425                 out_be32((void *)CFG_POST_MAGIC, REBOOT_MAGIC);
 426                 out_be32((void *)CFG_POST_VAL, REBOOT_DO_POST);
 427                 post_bootmode_init();
 428
 429                 /*
 430                  * Reset the logbuffer for a clean start
 431                  */
 432                 logbuff_reset();
 433
 434                 do_reset(NULL, 0, 0, NULL);
 435
 436                 return 0;
 437         }
 438
 439         return 0;
 440 }
 441
 442 U_BOOT_CMD (
 443         chkreset, 1, 1, do_chkreset,
 444         "chkreset- Check for status of SW-reset button and act accordingly\n",
 445         NULL
 446 );
 447
 448 #if defined(CONFIG_POST)
 449 /*
 450  * Returns 1 if keys pressed to start the power-on long-running tests
 451  * Called from board_init_f().
 452  */
 453 int post_hotkeys_pressed(void)
 454 {
 455         u32 post_magic;
 456         u32 post_val;
 457
 458         post_magic = in_be32((void *)CFG_POST_MAGIC);
 459         post_val = in_be32((void *)CFG_POST_VAL);
 460
 461         if ((post_magic == REBOOT_MAGIC) && (post_val == REBOOT_DO_POST))
 462                 return 1;
 463         else
 464                 return 0;
 465 }
 466 #endif /* CONFIG_POST */