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/ppc4xx-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
  48 static u32 start_time;
  49
  50 int board_early_init_f(void)
  51 {
  52         mtdcr(UIC0SR, 0xFFFFFFFF);      /* clear all ints */
  53         mtdcr(UIC0ER, 0x00000000);      /* disable all ints */
  54         mtdcr(UIC0CR, 0x00000000);
  55         mtdcr(UIC0PR, 0xFFFF7F00);      /* set int polarities */
  56         mtdcr(UIC0TR, 0x00000000);      /* set int trigger levels */
  57         mtdcr(UIC0SR, 0xFFFFFFFF);      /* clear all ints */
  58         mtdcr(UIC0VCR, 0x00000001);     /* set vect base=0,INT0 highest priority */
  59
  60         /*
  61          * Configure CPC0_PCI to enable PerWE as output
  62          */
  63         mtdcr(CPC0_PCI, CPC0_PCI_SPE);
  64
  65         return 0;
  66 }
  67
  68 int misc_init_r(void)
  69 {
  70         u32 pbcr;
  71         int size_val = 0;
  72         u32 post_magic;
  73         u32 post_val;
  74
  75         post_magic = in_be32((void *)CONFIG_SYS_POST_MAGIC);
  76         post_val = in_be32((void *)CONFIG_SYS_POST_VAL);
  77         if ((post_magic == REBOOT_MAGIC) && (post_val == REBOOT_DO_POST)) {
  78                 /*
  79                  * Set special bootline bootparameter to pass this POST boot
  80                  * mode to Linux to reset the username/password
  81                  */
  82                 setenv("addmisc", "setenv bootargs \\${bootargs} factory_reset=yes");
  83
  84                 /*
  85                  * Normally don't run POST tests, only when enabled
  86                  * via the sw-reset button. So disable further tests
  87                  * upon next bootup here.
  88                  */
  89                 out_be32((void *)CONFIG_SYS_POST_VAL, REBOOT_NOP);
  90         } else {
  91                 /*
  92                  * Only run POST when initiated via the sw-reset button mechanism
  93                  */
  94                 post_word_store(0);
  95         }
  96
  97         /*
  98          * Get current time
  99          */
 100         start_time = get_timer(0);
 101
 102         /*
 103          * FLASH stuff...
 104          */
 105
 106         /* Re-do sizing to get full correct info */
 107
 108         /* adjust flash start and offset */
 109         mfebc(PB0CR, pbcr);
 110         switch (gd->bd->bi_flashsize) {
 111         case 1 << 20:
 112                 size_val = 0;
 113                 break;
 114         case 2 << 20:
 115                 size_val = 1;
 116                 break;
 117         case 4 << 20:
 118                 size_val = 2;
 119                 break;
 120         case 8 << 20:
 121                 size_val = 3;
 122                 break;
 123         case 16 << 20:
 124                 size_val = 4;
 125                 break;
 126         case 32 << 20:
 127                 size_val = 5;
 128                 break;
 129         case 64 << 20:
 130                 size_val = 6;
 131                 break;
 132         case 128 << 20:
 133                 size_val = 7;
 134                 break;
 135         }
 136         pbcr = (pbcr & 0x0001ffff) | gd->bd->bi_flashstart | (size_val << 17);
 137         mtebc(PB0CR, pbcr);
 138
 139         /*
 140          * Re-check to get correct base address
 141          */
 142         flash_get_size(gd->bd->bi_flashstart, 0);
 143
 144         /* Monitor protection ON by default */
 145         (void)flash_protect(FLAG_PROTECT_SET,
 146                             -CONFIG_SYS_MONITOR_LEN,
 147                             0xffffffff,
 148                             &flash_info[0]);
 149
 150         /* Env protection ON by default */
 151         (void)flash_protect(FLAG_PROTECT_SET,
 152                             CONFIG_ENV_ADDR_REDUND,
 153                             CONFIG_ENV_ADDR_REDUND + 2*CONFIG_ENV_SECT_SIZE - 1,
 154                             &flash_info[0]);
 155
 156         return 0;
 157 }
 158
 159 /*
 160  * Check Board Identity:
 161  */
 162 int checkboard(void)
 163 {
 164         char *s = getenv("serial#");
 165
 166         puts("Board: Zeus-");
 167
 168         if (in_be32((void *)GPIO0_IR) & GPIO_VAL(CONFIG_SYS_GPIO_ZEUS_PE))
 169                 puts("PE");
 170         else
 171                 puts("CE");
 172
 173         puts(" of BulletEndPoint");
 174
 175         if (s != NULL) {
 176                 puts(", serial# ");
 177                 puts(s);
 178         }
 179         putc('\n');
 180
 181         /* both LED's off */
 182         gpio_write_bit(CONFIG_SYS_GPIO_LED_RED, 0);
 183         gpio_write_bit(CONFIG_SYS_GPIO_LED_GREEN, 0);
 184         udelay(10000);
 185         /* and on again */
 186         gpio_write_bit(CONFIG_SYS_GPIO_LED_RED, 1);
 187         gpio_write_bit(CONFIG_SYS_GPIO_LED_GREEN, 1);
 188
 189         return (0);
 190 }
 191
 192 static int default_env_var(char *buf, char *var)
 193 {
 194         char *ptr;
 195         char *val;
 196
 197         /*
 198          * Find env variable
 199          */
 200         ptr = strstr(buf + 4, var);
 201         if (ptr == NULL) {
 202                 printf("ERROR: %s not found!\n", var);
 203                 return -1;
 204         }
 205         ptr += strlen(var) + 1;
 206
 207         /*
 208          * Now the ethaddr needs to be updated in the "normal"
 209          * environment storage -> redundant flash.
 210          */
 211         val = ptr;
 212         setenv(var, val);
 213         printf("Updated %s from eeprom to %s!\n", var, val);
 214
 215         return 0;
 216 }
 217
 218 static int restore_default(void)
 219 {
 220         char *buf;
 221         char *buf_save;
 222         u32 crc;
 223
 224         set_default_env("");
 225
 226         gd->env_valid = 1;
 227
 228         /*
 229          * Read board specific values from I2C EEPROM
 230          * and set env variables accordingly
 231          * -> ethaddr, eth1addr, serial#
 232          */
 233         buf = buf_save = malloc(FACTORY_RESET_ENV_SIZE);
 234         if (buf == NULL) {
 235                 printf("ERROR: malloc() failed\n");
 236                 return -1;
 237         }
 238         if (eeprom_read(FACTORY_RESET_I2C_EEPROM, FACTORY_RESET_ENV_OFFS,
 239                         (u8 *)buf, FACTORY_RESET_ENV_SIZE)) {
 240                 puts("\nError reading EEPROM!\n");
 241         } else {
 242                 crc = crc32(0, (u8 *)(buf + 4), FACTORY_RESET_ENV_SIZE - 4);
 243                 if (crc != *(u32 *)buf) {
 244                         printf("ERROR: crc mismatch %08x %08x\n", crc, *(u32 *)buf);
 245                         return -1;
 246                 }
 247
 248                 default_env_var(buf, "ethaddr");
 249                 buf += 8 + 18;
 250                 default_env_var(buf, "eth1addr");
 251                 buf += 9 + 18;
 252                 default_env_var(buf, "serial#");
 253         }
 254
 255         /*
 256          * Finally save updated env variables back to flash
 257          */
 258         saveenv();
 259
 260         free(buf_save);
 261
 262         return 0;
 263 }
 264
 265 int do_set_default(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 266 {
 267         char *buf;
 268         char *buf_save;
 269         char str[32];
 270         u32 crc;
 271         char var[32];
 272
 273         if (argc < 4) {
 274                 puts("ERROR!\n");
 275                 return -1;
 276         }
 277
 278         buf = buf_save = malloc(FACTORY_RESET_ENV_SIZE);
 279         memset(buf, 0, FACTORY_RESET_ENV_SIZE);
 280
 281         strcpy(var, "ethaddr");
 282         printf("Setting %s to %s\n", var, argv[1]);
 283         sprintf(str, "%s=%s", var, argv[1]);
 284         strcpy(buf + 4, str);
 285         buf += strlen(str) + 1;
 286
 287         strcpy(var, "eth1addr");
 288         printf("Setting %s to %s\n", var, argv[2]);
 289         sprintf(str, "%s=%s", var, argv[2]);
 290         strcpy(buf + 4, str);
 291         buf += strlen(str) + 1;
 292
 293         strcpy(var, "serial#");
 294         printf("Setting %s to %s\n", var, argv[3]);
 295         sprintf(str, "%s=%s", var, argv[3]);
 296         strcpy(buf + 4, str);
 297
 298         crc = crc32(0, (u8 *)(buf_save + 4), FACTORY_RESET_ENV_SIZE - 4);
 299         *(u32 *)buf_save = crc;
 300
 301         if (eeprom_write(FACTORY_RESET_I2C_EEPROM, FACTORY_RESET_ENV_OFFS,
 302                          (u8 *)buf_save, FACTORY_RESET_ENV_SIZE)) {
 303                 puts("\nError writing EEPROM!\n");
 304                 return -1;
 305         }
 306
 307         free(buf_save);
 308
 309         return 0;
 310 }
 311
 312 U_BOOT_CMD(
 313         setdef, 4,      1,      do_set_default,
 314         "write board-specific values to EEPROM (ethaddr...)",
 315         "ethaddr eth1addr serial#\n    - write board-specific values to EEPROM"
 316         );
 317
 318 static inline int sw_reset_pressed(void)
 319 {
 320         return !(in_be32((void *)GPIO0_IR) & GPIO_VAL(CONFIG_SYS_GPIO_SW_RESET));
 321 }
 322
 323 int do_chkreset(cmd_tbl_t* cmdtp, int flag, int argc, char * const argv[])
 324 {
 325         int delta;
 326         int count = 0;
 327         int post = 0;
 328         int factory_reset = 0;
 329
 330         if (!sw_reset_pressed()) {
 331                 printf("SW-Reset already high (Button released)\n");
 332                 printf("-> No action taken!\n");
 333                 return 0;
 334         }
 335
 336         printf("Waiting for SW-Reset button to be released.");
 337
 338         while (1) {
 339                 delta = get_timer(start_time);
 340                 if (!sw_reset_pressed())
 341                         break;
 342
 343                 if ((delta > CONFIG_SYS_TIME_POST) && !post) {
 344                         printf("\nWhen released now, POST tests will be started.");
 345                         gpio_write_bit(CONFIG_SYS_GPIO_LED_GREEN, 0);
 346                         post = 1;
 347                 }
 348
 349                 if ((delta > CONFIG_SYS_TIME_FACTORY_RESET) && !factory_reset) {
 350                         printf("\nWhen released now, factory default values"
 351                                " will be restored.");
 352                         gpio_write_bit(CONFIG_SYS_GPIO_LED_RED, 0);
 353                         factory_reset = 1;
 354                 }
 355
 356                 udelay(1000);
 357                 if (!(count++ % 1000))
 358                         printf(".");
 359         }
 360
 361
 362         printf("\nSW-Reset Button released after %d milli-seconds!\n", delta);
 363
 364         if (delta > CONFIG_SYS_TIME_FACTORY_RESET) {
 365                 printf("Starting factory reset value restoration...\n");
 366
 367                 /*
 368                  * Restore default setting
 369                  */
 370                 restore_default();
 371
 372                 /*
 373                  * Reset the board for default to become valid
 374                  */
 375                 do_reset(NULL, 0, 0, NULL);
 376
 377                 return 0;
 378         }
 379
 380         if (delta > CONFIG_SYS_TIME_POST) {
 381                 printf("Starting POST configuration...\n");
 382
 383                 /*
 384                  * Enable POST upon next bootup
 385                  */
 386                 out_be32((void *)CONFIG_SYS_POST_MAGIC, REBOOT_MAGIC);
 387                 out_be32((void *)CONFIG_SYS_POST_VAL, REBOOT_DO_POST);
 388                 post_bootmode_init();
 389
 390                 /*
 391                  * Reset the logbuffer for a clean start
 392                  */
 393                 logbuff_reset();
 394
 395                 do_reset(NULL, 0, 0, NULL);
 396
 397                 return 0;
 398         }
 399
 400         return 0;
 401 }
 402
 403 U_BOOT_CMD (
 404         chkreset, 1, 1, do_chkreset,
 405         "Check for status of SW-reset button and act accordingly",
 406         ""
 407 );
 408
 409 #if defined(CONFIG_POST)
 410 /*
 411  * Returns 1 if keys pressed to start the power-on long-running tests
 412  * Called from board_init_f().
 413  */
 414 int post_hotkeys_pressed(void)
 415 {
 416         u32 post_magic;
 417         u32 post_val;
 418
 419         post_magic = in_be32((void *)CONFIG_SYS_POST_MAGIC);
 420         post_val = in_be32((void *)CONFIG_SYS_POST_VAL);
 421
 422         if ((post_magic == REBOOT_MAGIC) && (post_val == REBOOT_DO_POST))
 423                 return 1;
 424         else
 425                 return 0;
 426 }
 427 #endif /* CONFIG_POST */