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[CONFIG_SYS_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 *)CONFIG_SYS_POST_MAGIC);
  77         post_val = in_be32((void *)CONFIG_SYS_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 *)CONFIG_SYS_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                             -CONFIG_SYS_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(CONFIG_SYS_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(CONFIG_SYS_GPIO_LED_RED, 0);
 184         gpio_write_bit(CONFIG_SYS_GPIO_LED_GREEN, 0);
 185         udelay(10000);
 186         /* and on again */
 187         gpio_write_bit(CONFIG_SYS_GPIO_LED_RED, 1);
 188         gpio_write_bit(CONFIG_SYS_GPIO_LED_GREEN, 1);
 189
 190         return (0);
 191 }
 192
 193 static int default_env_var(char *buf, char *var)
 194 {
 195         char *ptr;
 196         char *val;
 197
 198         /*
 199          * Find env variable
 200          */
 201         ptr = strstr(buf + 4, var);
 202         if (ptr == NULL) {
 203                 printf("ERROR: %s not found!\n", var);
 204                 return -1;
 205         }
 206         ptr += strlen(var) + 1;
 207
 208         /*
 209          * Now the ethaddr needs to be updated in the "normal"
 210          * environment storage -> redundant flash.
 211          */
 212         val = ptr;
 213         setenv(var, val);
 214         printf("Updated %s from eeprom to %s!\n", var, val);
 215
 216         return 0;
 217 }
 218
 219 static int restore_default(void)
 220 {
 221         char *buf;
 222         char *buf_save;
 223         u32 crc;
 224
 225         /*
 226          * Unprotect and erase environment area
 227          */
 228         flash_protect(FLAG_PROTECT_CLEAR,
 229                       CONFIG_ENV_ADDR_REDUND,
 230                       CONFIG_ENV_ADDR_REDUND + 2*CONFIG_ENV_SECT_SIZE - 1,
 231                       &flash_info[0]);
 232
 233         flash_sect_erase(CONFIG_ENV_ADDR_REDUND,
 234                          CONFIG_ENV_ADDR_REDUND + 2*CONFIG_ENV_SECT_SIZE - 1);
 235
 236         /*
 237          * Now restore default environment from U-Boot image
 238          * -> ipaddr, serverip...
 239          */
 240         memset(env_ptr, 0, sizeof(env_t));
 241         memcpy(env_ptr->data, default_environment, ENV_SIZE);
 242 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
 243         env_ptr->flags = 0xFF;
 244 #endif
 245         env_crc_update();
 246         gd->env_valid = 1;
 247
 248         /*
 249          * Read board specific values from I2C EEPROM
 250          * and set env variables accordingly
 251          * -> ethaddr, eth1addr, serial#
 252          */
 253         buf = buf_save = malloc(FACTORY_RESET_ENV_SIZE);
 254         if (eeprom_read(FACTORY_RESET_I2C_EEPROM, FACTORY_RESET_ENV_OFFS,
 255                         (u8 *)buf, FACTORY_RESET_ENV_SIZE)) {
 256                 puts("\nError reading EEPROM!\n");
 257         } else {
 258                 crc = crc32(0, (u8 *)(buf + 4), FACTORY_RESET_ENV_SIZE - 4);
 259                 if (crc != *(u32 *)buf) {
 260                         printf("ERROR: crc mismatch %08x %08x\n", crc, *(u32 *)buf);
 261                         return -1;
 262                 }
 263
 264                 default_env_var(buf, "ethaddr");
 265                 buf += 8 + 18;
 266                 default_env_var(buf, "eth1addr");
 267                 buf += 9 + 18;
 268                 default_env_var(buf, "serial#");
 269         }
 270
 271         /*
 272          * Finally save updated env variables back to flash
 273          */
 274         saveenv();
 275
 276         free(buf_save);
 277
 278         return 0;
 279 }
 280
 281 int do_set_default(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 282 {
 283         char *buf;
 284         char *buf_save;
 285         char str[32];
 286         u32 crc;
 287         char var[32];
 288
 289         if (argc < 4) {
 290                 puts("ERROR!\n");
 291                 return -1;
 292         }
 293
 294         buf = buf_save = malloc(FACTORY_RESET_ENV_SIZE);
 295         memset(buf, 0, FACTORY_RESET_ENV_SIZE);
 296
 297         strcpy(var, "ethaddr");
 298         printf("Setting %s to %s\n", var, argv[1]);
 299         sprintf(str, "%s=%s", var, argv[1]);
 300         strcpy(buf + 4, str);
 301         buf += strlen(str) + 1;
 302
 303         strcpy(var, "eth1addr");
 304         printf("Setting %s to %s\n", var, argv[2]);
 305         sprintf(str, "%s=%s", var, argv[2]);
 306         strcpy(buf + 4, str);
 307         buf += strlen(str) + 1;
 308
 309         strcpy(var, "serial#");
 310         printf("Setting %s to %s\n", var, argv[3]);
 311         sprintf(str, "%s=%s", var, argv[3]);
 312         strcpy(buf + 4, str);
 313
 314         crc = crc32(0, (u8 *)(buf_save + 4), FACTORY_RESET_ENV_SIZE - 4);
 315         *(u32 *)buf_save = crc;
 316
 317         if (eeprom_write(FACTORY_RESET_I2C_EEPROM, FACTORY_RESET_ENV_OFFS,
 318                          (u8 *)buf_save, FACTORY_RESET_ENV_SIZE)) {
 319                 puts("\nError writing EEPROM!\n");
 320                 return -1;
 321         }
 322
 323         free(buf_save);
 324
 325         return 0;
 326 }
 327
 328 U_BOOT_CMD(
 329         setdef, 4,      1,      do_set_default,
 330         "write board-specific values to EEPROM (ethaddr...)",
 331         "ethaddr eth1addr serial#\n    - write board-specific values to EEPROM"
 332         );
 333
 334 static inline int sw_reset_pressed(void)
 335 {
 336         return !(in_be32((void *)GPIO0_IR) & GPIO_VAL(CONFIG_SYS_GPIO_SW_RESET));
 337 }
 338
 339 int do_chkreset(cmd_tbl_t* cmdtp, int flag, int argc, char* argv[])
 340 {
 341         int delta;
 342         int count = 0;
 343         int post = 0;
 344         int factory_reset = 0;
 345
 346         if (!sw_reset_pressed()) {
 347                 printf("SW-Reset already high (Button released)\n");
 348                 printf("-> No action taken!\n");
 349                 return 0;
 350         }
 351
 352         printf("Waiting for SW-Reset button to be released.");
 353
 354         while (1) {
 355                 delta = get_timer(start_time);
 356                 if (!sw_reset_pressed())
 357                         break;
 358
 359                 if ((delta > CONFIG_SYS_TIME_POST) && !post) {
 360                         printf("\nWhen released now, POST tests will be started.");
 361                         gpio_write_bit(CONFIG_SYS_GPIO_LED_GREEN, 0);
 362                         post = 1;
 363                 }
 364
 365                 if ((delta > CONFIG_SYS_TIME_FACTORY_RESET) && !factory_reset) {
 366                         printf("\nWhen released now, factory default values"
 367                                " will be restored.");
 368                         gpio_write_bit(CONFIG_SYS_GPIO_LED_RED, 0);
 369                         factory_reset = 1;
 370                 }
 371
 372                 udelay(1000);
 373                 if (!(count++ % 1000))
 374                         printf(".");
 375         }
 376
 377
 378         printf("\nSW-Reset Button released after %d milli-seconds!\n", delta);
 379
 380         if (delta > CONFIG_SYS_TIME_FACTORY_RESET) {
 381                 printf("Starting factory reset value restoration...\n");
 382
 383                 /*
 384                  * Restore default setting
 385                  */
 386                 restore_default();
 387
 388                 /*
 389                  * Reset the board for default to become valid
 390                  */
 391                 do_reset(NULL, 0, 0, NULL);
 392
 393                 return 0;
 394         }
 395
 396         if (delta > CONFIG_SYS_TIME_POST) {
 397                 printf("Starting POST configuration...\n");
 398
 399                 /*
 400                  * Enable POST upon next bootup
 401                  */
 402                 out_be32((void *)CONFIG_SYS_POST_MAGIC, REBOOT_MAGIC);
 403                 out_be32((void *)CONFIG_SYS_POST_VAL, REBOOT_DO_POST);
 404                 post_bootmode_init();
 405
 406                 /*
 407                  * Reset the logbuffer for a clean start
 408                  */
 409                 logbuff_reset();
 410
 411                 do_reset(NULL, 0, 0, NULL);
 412
 413                 return 0;
 414         }
 415
 416         return 0;
 417 }
 418
 419 U_BOOT_CMD (
 420         chkreset, 1, 1, do_chkreset,
 421         "Check for status of SW-reset button and act accordingly",
 422         ""
 423 );
 424
 425 #if defined(CONFIG_POST)
 426 /*
 427  * Returns 1 if keys pressed to start the power-on long-running tests
 428  * Called from board_init_f().
 429  */
 430 int post_hotkeys_pressed(void)
 431 {
 432         u32 post_magic;
 433         u32 post_val;
 434
 435         post_magic = in_be32((void *)CONFIG_SYS_POST_MAGIC);
 436         post_val = in_be32((void *)CONFIG_SYS_POST_VAL);
 437
 438         if ((post_magic == REBOOT_MAGIC) && (post_val == REBOOT_DO_POST))
 439                 return 1;
 440         else
 441                 return 0;
 442 }
 443 #endif /* CONFIG_POST */