board/trab/cmd_trab.c

   1 /*
   2  * (C) Copyright 2003
   3  * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.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 #undef DEBUG
  25
  26 #include <common.h>
  27 #include <command.h>
  28 #include <s3c2400.h>
  29 #include <rtc.h>
  30
  31 /*
  32  * TRAB board specific commands. Especially commands for burn-in and function
  33  * test.
  34  */
  35 #if defined(CONFIG_CMD_BSP)
  36
  37 /* limits for valid range of VCC5V in mV  */
  38 #define VCC5V_MIN       4500
  39 #define VCC5V_MAX       5500
  40
  41 /*
  42  * Test strings for EEPROM test. Length of string 2 must not exceed length of
  43  * string 1. Otherwise a buffer overrun could occur!
  44  */
  45 #define EEPROM_TEST_STRING_1    "0987654321 :tset a si siht"
  46 #define EEPROM_TEST_STRING_2    "this is a test: 1234567890"
  47
  48 /*
  49  * min/max limits for valid contact temperature during burn in test (in
  50  * degree Centigrade * 100)
  51  */
  52 #define MIN_CONTACT_TEMP        -1000
  53 #define MAX_CONTACT_TEMP        +9000
  54
  55 /* blinking frequency of status LED */
  56 #define LED_BLINK_FREQ          5
  57
  58 /* delay time between burn in cycles in seconds */
  59 #ifndef BURN_IN_CYCLE_DELAY     /* if not defined in include/configs/trab.h */
  60 #define BURN_IN_CYCLE_DELAY     5
  61 #endif
  62
  63 /* physical SRAM parameters */
  64 #define SRAM_ADDR       0x02000000 /* GCS1 */
  65 #define SRAM_SIZE       0x40000 /* 256 kByte */
  66
  67 /* CPLD-Register for controlling TRAB hardware functions */
  68 #define CPLD_BUTTONS            ((volatile unsigned long *)0x04020000)
  69 #define CPLD_FILL_LEVEL         ((volatile unsigned long *)0x04008000)
  70 #define CPLD_ROTARY_SWITCH      ((volatile unsigned long *)0x04018000)
  71 #define CPLD_RS485_RE           ((volatile unsigned long *)0x04028000)
  72
  73 /* I2C EEPROM device address */
  74 #define I2C_EEPROM_DEV_ADDR     0x54
  75
  76 /* EEPROM address map */
  77 #define EE_ADDR_TEST                    192
  78 #define EE_ADDR_MAX_CYCLES              256
  79 #define EE_ADDR_STATUS                  258
  80 #define EE_ADDR_PASS_CYCLES             259
  81 #define EE_ADDR_FIRST_ERROR_CYCLE       261
  82 #define EE_ADDR_FIRST_ERROR_NUM         263
  83 #define EE_ADDR_FIRST_ERROR_NAME        264
  84 #define EE_ADDR_ACT_CYCLE               280
  85
  86 /* Bit definitions for ADCCON */
  87 #define ADC_ENABLE_START     0x1
  88 #define ADC_READ_START       0x2
  89 #define ADC_STDBM            0x4
  90 #define ADC_INP_AIN0         (0x0 << 3)
  91 #define ADC_INP_AIN1         (0x1 << 3)
  92 #define ADC_INP_AIN2         (0x2 << 3)
  93 #define ADC_INP_AIN3         (0x3 << 3)
  94 #define ADC_INP_AIN4         (0x4 << 3)
  95 #define ADC_INP_AIN5         (0x5 << 3)
  96 #define ADC_INP_AIN6         (0x6 << 3)
  97 #define ADC_INP_AIN7         (0x7 << 3)
  98 #define ADC_PRSCEN           0x4000
  99 #define ADC_ECFLG            0x800
 100
 101 /* misc */
 102
 103 /* externals */
 104 extern int memory_post_tests (unsigned long start, unsigned long size);
 105 extern int i2c_write (uchar, uint, int , uchar* , int);
 106 extern int i2c_read (uchar, uint, int , uchar* , int);
 107 extern void tsc2000_reg_init (void);
 108 extern s32 tsc2000_contact_temp (void);
 109 extern void spi_init(void);
 110
 111 /* function declarations */
 112 int do_dip (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
 113 int do_vcc5v (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
 114 int do_burn_in (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
 115 int do_contact_temp (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
 116 int do_burn_in_status (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
 117 int i2c_write_multiple (uchar chip, uint addr, int alen,
 118                         uchar *buffer, int len);
 119 int i2c_read_multiple (uchar chip, uint addr, int alen,
 120                         uchar *buffer, int len);
 121 int do_temp_log (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
 122
 123 /* helper functions */
 124 static void adc_init (void);
 125 static int adc_read (unsigned int channel);
 126 static int read_dip (void);
 127 static int read_vcc5v (void);
 128 static int test_dip (void);
 129 static int test_vcc5v (void);
 130 static int test_rotary_switch (void);
 131 static int test_sram (void);
 132 static int test_eeprom (void);
 133 static int test_contact_temp (void);
 134 static void led_set (unsigned int);
 135 static void led_blink (void);
 136 static void led_init (void);
 137 static void sdelay (unsigned long seconds); /* delay in seconds */
 138 static int dummy (void);
 139 static int read_max_cycles(void);
 140 static void test_function_table_init (void);
 141 static void global_vars_init (void);
 142 static int global_vars_write_to_eeprom (void);
 143
 144 /* globals */
 145 u16 max_cycles;
 146 u8 status;
 147 u16 pass_cycles;
 148 u16 first_error_cycle;
 149 u8 first_error_num;
 150 char first_error_name[16];
 151 u16 act_cycle;
 152
 153 typedef struct test_function_s {
 154         char *name;
 155         int (*pf)(void);
 156 } test_function_t;
 157
 158 /* max number of Burn In Functions */
 159 #define BIF_MAX 6
 160
 161 /* table with burn in functions */
 162 test_function_t test_function[BIF_MAX];
 163
 164
 165 int do_burn_in (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 166 {
 167         int i;
 168         int cycle_status;
 169
 170         if (argc > 1) {
 171                 printf ("Usage:\n%s\n", cmdtp->usage);
 172                 return 1;
 173         }
 174
 175         led_init ();
 176         global_vars_init ();
 177         test_function_table_init ();
 178         spi_init ();
 179
 180         if (global_vars_write_to_eeprom () != 0) {
 181                 printf ("%s: error writing global_vars to eeprom\n",
 182                         __FUNCTION__);
 183                 return (1);
 184         }
 185
 186         if (read_max_cycles () != 0) {
 187                 printf ("%s: error reading max_cycles from eeprom\n",
 188                         __FUNCTION__);
 189                 return (1);
 190         }
 191
 192         if (max_cycles == 0) {
 193                 printf ("%s: error, burn in max_cycles = 0\n", __FUNCTION__);
 194                 return (1);
 195         }
 196
 197         status = 0;
 198         for (act_cycle = 1; act_cycle <= max_cycles; act_cycle++) {
 199
 200                 cycle_status = 0;
 201
 202                 /*
 203                  * avoid timestamp overflow problem after about 68 minutes of
 204                  * udelay() time.
 205                  */
 206                 reset_timer_masked ();
 207                 for (i = 0; i < BIF_MAX; i++) {
 208
 209                         /* call test function */
 210                         if ((*test_function[i].pf)() != 0) {
 211                                 printf ("error in %s test\n",
 212                                         test_function[i].name);
 213
 214                                 /* is it the first error? */
 215                                 if (status == 0) {
 216                                         status = 1;
 217                                         first_error_cycle = act_cycle;
 218
 219                                         /* do not use error_num 0 */
 220                                         first_error_num = i+1;
 221                                         strncpy (first_error_name,
 222                                                  test_function[i].name,
 223                                                  sizeof (first_error_name));
 224                                         led_set (0);
 225                                 }
 226                                 cycle_status = 1;
 227                         }
 228                 }
 229                 /* were all tests of actual cycle OK? */
 230                 if (cycle_status == 0)
 231                         pass_cycles++;
 232
 233                 /* set status LED if no error is occoured since yet */
 234                 if (status == 0)
 235                         led_set (1);
 236
 237                 printf ("%s: cycle %d finished\n", __FUNCTION__, act_cycle);
 238
 239                 /* pause between cycles */
 240                 sdelay (BURN_IN_CYCLE_DELAY);
 241         }
 242
 243         if (global_vars_write_to_eeprom () != 0) {
 244                 led_set (0);
 245                 printf ("%s: error writing global_vars to eeprom\n",
 246                         __FUNCTION__);
 247                 status = 1;
 248         }
 249
 250         if (status == 0) {
 251                 led_blink ();   /* endless loop!! */
 252                 return (0);
 253         } else {
 254                 led_set (0);
 255                 return (1);
 256         }
 257 }
 258
 259 U_BOOT_CMD(
 260         burn_in,        1,      1,      do_burn_in,
 261         "burn_in - start burn-in test application on TRAB\n",
 262         "\n"
 263         "    -  start burn-in test application\n"
 264         "       The burn-in test could took a while to finish!\n"
 265         "       The content of the onboard EEPROM is modified!\n"
 266 );
 267
 268
 269 int do_dip (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 270 {
 271         int i, dip;
 272
 273         if (argc > 1) {
 274                 printf ("Usage:\n%s\n", cmdtp->usage);
 275                 return 1;
 276         }
 277
 278         if ((dip = read_dip ()) == -1) {
 279                 return 1;
 280         }
 281
 282         for (i = 0; i < 4; i++) {
 283                 if ((dip & (1 << i)) == 0)
 284                         printf("0");
 285                 else
 286                         printf("1");
 287         }
 288         printf("\n");
 289
 290         return 0;
 291 }
 292
 293 U_BOOT_CMD(
 294         dip,    1,      1,      do_dip,
 295         "dip     - read dip switch on TRAB\n",
 296         "\n"
 297         "    - read state of dip switch (S1) on TRAB board\n"
 298         "      read sequence: 1-2-3-4; ON=1; OFF=0; e.g.: \"0100\"\n"
 299 );
 300
 301
 302 int do_vcc5v (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 303 {
 304         int vcc5v;
 305
 306         if (argc > 1) {
 307                 printf ("Usage:\n%s\n", cmdtp->usage);
 308                 return 1;
 309         }
 310
 311         if ((vcc5v = read_vcc5v ()) == -1) {
 312                 return (1);
 313         }
 314
 315         printf ("%d", (vcc5v / 1000));
 316         printf (".%d", (vcc5v % 1000) / 100);
 317         printf ("%d V\n", (vcc5v % 100) / 10) ;
 318
 319         return 0;
 320 }
 321
 322 U_BOOT_CMD(
 323         vcc5v,  1,      1,      do_vcc5v,
 324         "vcc5v   - read VCC5V on TRAB\n",
 325         "\n"
 326         "    - read actual value of voltage VCC5V\n"
 327 );
 328
 329
 330 int do_contact_temp (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 331 {
 332         int contact_temp;
 333
 334         if (argc > 1) {
 335                 printf ("Usage:\n%s\n", cmdtp->usage);
 336                 return 1;
 337         }
 338
 339         spi_init ();
 340
 341         contact_temp = tsc2000_contact_temp();
 342         printf ("%d degree C * 100\n", contact_temp) ;
 343
 344         return 0;
 345 }
 346
 347 U_BOOT_CMD(
 348         c_temp, 1,      1,      do_contact_temp,
 349         "c_temp  - read contact temperature on TRAB\n",
 350         "\n"
 351         "    -  reads the onboard temperature (=contact temperature)\n"
 352 );
 353
 354
 355 int do_burn_in_status (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 356 {
 357         if (argc > 1) {
 358                 printf ("Usage:\n%s\n", cmdtp->usage);
 359                 return 1;
 360         }
 361
 362         if (i2c_read_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_STATUS, 1,
 363                                 (unsigned char*) &status, 1)) {
 364                 return (1);
 365         }
 366         if (i2c_read_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_PASS_CYCLES, 1,
 367                                 (unsigned char*) &pass_cycles, 2)) {
 368                 return (1);
 369         }
 370         if (i2c_read_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_FIRST_ERROR_CYCLE,
 371                                 1, (unsigned char*) &first_error_cycle, 2)) {
 372                 return (1);
 373         }
 374         if (i2c_read_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_FIRST_ERROR_NUM,
 375                                 1, (unsigned char*) &first_error_num, 1)) {
 376                 return (1);
 377         }
 378         if (i2c_read_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_FIRST_ERROR_NAME,
 379                                1, (unsigned char*)first_error_name,
 380                                sizeof (first_error_name))) {
 381                 return (1);
 382         }
 383
 384         if (read_max_cycles () != 0) {
 385                 return (1);
 386         }
 387
 388         printf ("max_cycles = %d\n", max_cycles);
 389         printf ("status = %d\n", status);
 390         printf ("pass_cycles = %d\n", pass_cycles);
 391         printf ("first_error_cycle = %d\n", first_error_cycle);
 392         printf ("first_error_num = %d\n", first_error_num);
 393         printf ("first_error_name = %.*s\n",(int) sizeof(first_error_name),
 394                 first_error_name);
 395
 396         return 0;
 397 }
 398
 399 U_BOOT_CMD(
 400         bis,    1,      1,      do_burn_in_status,
 401         "bis     - print burn in status on TRAB\n",
 402         "\n"
 403         "    -  prints the status variables of the last burn in test\n"
 404         "       stored in the onboard EEPROM on TRAB board\n"
 405 );
 406
 407 static int read_dip (void)
 408 {
 409         unsigned int result = 0;
 410         int adc_val;
 411         int i;
 412
 413         /***********************************************************
 414          DIP switch connection (according to wa4-cpu.sp.301.pdf, page 3):
 415            SW1 - AIN4
 416            SW2 - AIN5
 417            SW3 - AIN6
 418            SW4 - AIN7
 419
 420            "On" DIP switch position short-circuits the voltage from
 421            the input channel (i.e. '0' conversion result means "on").
 422         *************************************************************/
 423
 424         for (i = 7; i > 3; i--) {
 425
 426                 if ((adc_val = adc_read (i)) == -1) {
 427                         printf ("%s: Channel %d could not be read\n",
 428                                  __FUNCTION__, i);
 429                         return (-1);
 430                 }
 431
 432                 /*
 433                  * Input voltage (switch open) is 1.8 V.
 434                  * (Vin_High/VRef)*adc_res = (1,8V/2,5V)*1023) = 736
 435                  * Set trigger at halve that value.
 436                  */
 437                 if (adc_val < 368)
 438                         result |= (1 << (i-4));
 439         }
 440         return (result);
 441 }
 442
 443
 444 static int read_vcc5v (void)
 445 {
 446         s32 result;
 447
 448         /* VCC5V is connected to channel 2 */
 449
 450         if ((result = adc_read (2)) == -1) {
 451                 printf ("%s: VCC5V could not be read\n", __FUNCTION__);
 452                 return (-1);
 453         }
 454         /*
 455          * Calculate voltage value. Split in two parts because there is no
 456          * floating point support.  VCC5V is connected over an resistor divider:
 457          * VCC5V=ADCval*2,5V/1023*(10K+30K)/10K.
 458          */
 459         result = result * 10 * 1000 / 1023; /* result in mV */
 460
 461         return (result);
 462 }
 463
 464
 465 static int test_dip (void)
 466 {
 467         static int first_run = 1;
 468         static int first_dip;
 469
 470         if (first_run) {
 471                 if ((first_dip = read_dip ()) == -1) {
 472                         return (1);
 473                 }
 474                 first_run = 0;
 475                 debug ("%s: first_dip=%d\n", __FUNCTION__, first_dip);
 476         }
 477         if (first_dip != read_dip ()) {
 478                 return (1);
 479         } else {
 480                 return (0);
 481         }
 482 }
 483
 484
 485 static int test_vcc5v (void)
 486 {
 487         int vcc5v;
 488
 489         if ((vcc5v = read_vcc5v ()) == -1) {
 490                 return (1);
 491         }
 492
 493         if ((vcc5v > VCC5V_MAX) || (vcc5v < VCC5V_MIN)) {
 494                 printf ("%s: vcc5v[V/100]=%d\n", __FUNCTION__, vcc5v);
 495                 return (1);
 496         } else {
 497                 return (0);
 498         }
 499 }
 500
 501
 502 static int test_rotary_switch (void)
 503 {
 504         static int first_run = 1;
 505         static int first_rs;
 506
 507         if (first_run) {
 508                 /*
 509                  * clear bits in CPLD, because they have random values after
 510                  * power-up or reset.
 511                  */
 512                 *CPLD_ROTARY_SWITCH |= (1 << 16) | (1 << 17);
 513
 514                 first_rs = ((*CPLD_ROTARY_SWITCH >> 16) & 0x7);
 515                 first_run = 0;
 516                 debug ("%s: first_rs=%d\n", __FUNCTION__, first_rs);
 517         }
 518
 519         if (first_rs != ((*CPLD_ROTARY_SWITCH >> 16) & 0x7)) {
 520                 return (1);
 521         } else {
 522                 return (0);
 523         }
 524 }
 525
 526
 527 static int test_sram (void)
 528 {
 529         return (memory_post_tests (SRAM_ADDR, SRAM_SIZE));
 530 }
 531
 532
 533 static int test_eeprom (void)
 534 {
 535         unsigned char temp[sizeof (EEPROM_TEST_STRING_1)];
 536         int result = 0;
 537
 538         /* write test string 1, read back and verify */
 539         if (i2c_write_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_TEST, 1,
 540                                 (unsigned char*)EEPROM_TEST_STRING_1,
 541                                 sizeof (EEPROM_TEST_STRING_1))) {
 542                 return (1);
 543         }
 544
 545         if (i2c_read_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_TEST, 1,
 546                                temp, sizeof (EEPROM_TEST_STRING_1))) {
 547                 return (1);
 548         }
 549
 550         if (strcmp ((char *)temp, EEPROM_TEST_STRING_1) != 0) {
 551                 result = 1;
 552                 printf ("%s: error; read_str = \"%s\"\n", __FUNCTION__, temp);
 553         }
 554
 555         /* write test string 2, read back and verify */
 556         if (result == 0) {
 557                 if (i2c_write_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_TEST, 1,
 558                                         (unsigned char*)EEPROM_TEST_STRING_2,
 559                                         sizeof (EEPROM_TEST_STRING_2))) {
 560                         return (1);
 561                 }
 562
 563                 if (i2c_read_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_TEST, 1,
 564                                        temp, sizeof (EEPROM_TEST_STRING_2))) {
 565                         return (1);
 566                 }
 567
 568                 if (strcmp ((char *)temp, EEPROM_TEST_STRING_2) != 0) {
 569                         result = 1;
 570                         printf ("%s: error; read str = \"%s\"\n",
 571                                 __FUNCTION__, temp);
 572                 }
 573         }
 574         return (result);
 575 }
 576
 577
 578 static int test_contact_temp (void)
 579 {
 580         int contact_temp;
 581
 582         contact_temp = tsc2000_contact_temp ();
 583
 584         if ((contact_temp < MIN_CONTACT_TEMP)
 585             || (contact_temp > MAX_CONTACT_TEMP))
 586                 return (1);
 587         else
 588                 return (0);
 589 }
 590
 591
 592 int i2c_write_multiple (uchar chip, uint addr, int alen,
 593                         uchar *buffer, int len)
 594 {
 595         int i;
 596
 597         if (alen != 1) {
 598                 printf ("%s: addr len other than 1 not supported\n",
 599                          __FUNCTION__);
 600                 return (1);
 601         }
 602
 603         for (i = 0; i < len; i++) {
 604                 if (i2c_write (chip, addr+i, alen, buffer+i, 1)) {
 605                         printf ("%s: could not write to i2c device %d"
 606                                  ", addr %d\n", __FUNCTION__, chip, addr);
 607                         return (1);
 608                 }
 609 #if 0
 610                 printf ("chip=%#x, addr+i=%#x+%d=%p, alen=%d, *buffer+i="
 611                         "%#x+%d=%p=\"%.1s\"\n", chip, addr, i, addr+i,
 612                         alen, buffer, i, buffer+i, buffer+i);
 613 #endif
 614
 615                 udelay (30000);
 616         }
 617         return (0);
 618 }
 619
 620
 621 int i2c_read_multiple ( uchar chip, uint addr, int alen,
 622                         uchar *buffer, int len)
 623 {
 624         int i;
 625
 626         if (alen != 1) {
 627                 printf ("%s: addr len other than 1 not supported\n",
 628                          __FUNCTION__);
 629                 return (1);
 630         }
 631
 632         for (i = 0; i < len; i++) {
 633                 if (i2c_read (chip, addr+i, alen, buffer+i, 1)) {
 634                         printf ("%s: could not read from i2c device %#x"
 635                                  ", addr %d\n", __FUNCTION__, chip, addr);
 636                         return (1);
 637                 }
 638         }
 639         return (0);
 640 }
 641
 642
 643 static int adc_read (unsigned int channel)
 644 {
 645         int j = 1000; /* timeout value for wait loop in us */
 646         int result;
 647         S3C2400_ADC *padc;
 648
 649         padc = S3C2400_GetBase_ADC();
 650         channel &= 0x7;
 651
 652         adc_init ();
 653
 654         padc->ADCCON &= ~ADC_STDBM; /* select normal mode */
 655         padc->ADCCON &= ~(0x7 << 3); /* clear the channel bits */
 656         padc->ADCCON |= ((channel << 3) | ADC_ENABLE_START);
 657
 658         while (j--) {
 659                 if ((padc->ADCCON & ADC_ENABLE_START) == 0)
 660                         break;
 661                 udelay (1);
 662         }
 663
 664         if (j == 0) {
 665                 printf("%s: ADC timeout\n", __FUNCTION__);
 666                 padc->ADCCON |= ADC_STDBM; /* select standby mode */
 667                 return -1;
 668         }
 669
 670         result = padc->ADCDAT & 0x3FF;
 671
 672         padc->ADCCON |= ADC_STDBM; /* select standby mode */
 673
 674         debug ("%s: channel %d, result[DIGIT]=%d\n", __FUNCTION__,
 675                (padc->ADCCON >> 3) & 0x7, result);
 676
 677         /*
 678          * Wait for ADC to be ready for next conversion. This delay value was
 679          * estimated, because the datasheet does not specify a value.
 680          */
 681         udelay (1000);
 682
 683         return (result);
 684 }
 685
 686
 687 static void adc_init (void)
 688 {
 689         S3C2400_ADC *padc;
 690
 691         padc = S3C2400_GetBase_ADC();
 692
 693         padc->ADCCON &= ~(0xff << 6); /* clear prescaler bits */
 694         padc->ADCCON |= ((65 << 6) | ADC_PRSCEN); /* set prescaler */
 695
 696         /*
 697          * Wait some time to avoid problem with very first call of
 698          * adc_read(). Without this delay, sometimes the first read
 699          * adc value is 0. Perhaps because the adjustment of prescaler
 700          * takes some clock cycles?
 701          */
 702         udelay (1000);
 703
 704         return;
 705 }
 706
 707
 708 static void led_set (unsigned int state)
 709 {
 710         S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
 711
 712         led_init ();
 713
 714         switch (state) {
 715         case 0: /* turn LED off */
 716                 gpio->PADAT |= (1 << 12);
 717                 break;
 718         case 1: /* turn LED on */
 719                 gpio->PADAT &= ~(1 << 12);
 720                 break;
 721         default:
 722                 break;
 723         }
 724 }
 725
 726 static void led_blink (void)
 727 {
 728         led_init ();
 729
 730         /* blink LED. This function does not return! */
 731         while (1) {
 732                 reset_timer_masked ();
 733                 led_set (1);
 734                 udelay (1000000 / LED_BLINK_FREQ / 2);
 735                 led_set (0);
 736                 udelay (1000000 / LED_BLINK_FREQ / 2);
 737         }
 738 }
 739
 740
 741 static void led_init (void)
 742 {
 743         S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
 744
 745         /* configure GPA12 as output and set to High -> LED off */
 746         gpio->PACON &= ~(1 << 12);
 747         gpio->PADAT |= (1 << 12);
 748 }
 749
 750
 751 static void sdelay (unsigned long seconds)
 752 {
 753         unsigned long i;
 754
 755         for (i = 0; i < seconds; i++) {
 756                 udelay (1000000);
 757         }
 758 }
 759
 760
 761 static int global_vars_write_to_eeprom (void)
 762 {
 763         if (i2c_write_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_STATUS, 1,
 764                                 (unsigned char*) &status, 1)) {
 765                 return (1);
 766         }
 767         if (i2c_write_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_PASS_CYCLES, 1,
 768                                 (unsigned char*) &pass_cycles, 2)) {
 769                 return (1);
 770         }
 771         if (i2c_write_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_FIRST_ERROR_CYCLE,
 772                                 1, (unsigned char*) &first_error_cycle, 2)) {
 773                 return (1);
 774         }
 775         if (i2c_write_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_FIRST_ERROR_NUM,
 776                                 1, (unsigned char*) &first_error_num, 1)) {
 777                 return (1);
 778         }
 779         if (i2c_write_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_FIRST_ERROR_NAME,
 780                                 1, (unsigned char*) first_error_name,
 781                                 sizeof(first_error_name))) {
 782                 return (1);
 783         }
 784         return (0);
 785 }
 786
 787 static void global_vars_init (void)
 788 {
 789         status                  = 1; /* error */
 790         pass_cycles             = 0;
 791         first_error_cycle       = 0;
 792         first_error_num         = 0;
 793         first_error_name[0]     = '\0';
 794         act_cycle               = 0;
 795         max_cycles              = 0;
 796 }
 797
 798
 799 static void test_function_table_init (void)
 800 {
 801         int i;
 802
 803         for (i = 0; i < BIF_MAX; i++)
 804                 test_function[i].pf = dummy;
 805
 806         /*
 807          * the length of "name" must not exceed 16, including the '\0'
 808          * termination. See also the EEPROM address map.
 809          */
 810         test_function[0].pf = test_dip;
 811         test_function[0].name = "dip";
 812
 813         test_function[1].pf = test_vcc5v;
 814         test_function[1].name = "vcc5v";
 815
 816         test_function[2].pf = test_rotary_switch;
 817         test_function[2].name = "rotary_switch";
 818
 819         test_function[3].pf = test_sram;
 820         test_function[3].name = "sram";
 821
 822         test_function[4].pf = test_eeprom;
 823         test_function[4].name = "eeprom";
 824
 825         test_function[5].pf = test_contact_temp;
 826         test_function[5].name = "contact_temp";
 827 }
 828
 829
 830 static int read_max_cycles (void)
 831 {
 832         if (i2c_read_multiple (I2C_EEPROM_DEV_ADDR, EE_ADDR_MAX_CYCLES, 1,
 833                                (unsigned char *) &max_cycles, 2) != 0) {
 834                 return (1);
 835         }
 836
 837         return (0);
 838 }
 839
 840 static int dummy(void)
 841 {
 842         return (0);
 843 }
 844
 845 int do_temp_log (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 846 {
 847         int contact_temp;
 848         int delay = 0;
 849 #if defined(CONFIG_CMD_DATE)
 850         struct rtc_time tm;
 851 #endif
 852
 853         if (argc > 2) {
 854                 printf ("Usage:\n%s\n", cmdtp->usage);
 855                 return 1;
 856         }
 857
 858         if (argc > 1) {
 859                 delay = simple_strtoul(argv[1], NULL, 10);
 860         }
 861
 862         spi_init ();
 863         while (1) {
 864
 865 #if defined(CONFIG_CMD_DATE)
 866                 rtc_get (&tm);
 867                 printf ("%4d-%02d-%02d %2d:%02d:%02d - ",
 868                         tm.tm_year, tm.tm_mon, tm.tm_mday,
 869                         tm.tm_hour, tm.tm_min, tm.tm_sec);
 870 #endif
 871
 872                 contact_temp = tsc2000_contact_temp();
 873                 printf ("%d\n", contact_temp) ;
 874
 875                 if (delay != 0)
 876                         /*
 877                          * reset timer to avoid timestamp overflow problem
 878                          * after about 68 minutes of udelay() time.
 879                          */
 880                         reset_timer_masked ();
 881                         sdelay (delay);
 882         }
 883
 884         return 0;
 885 }
 886
 887 U_BOOT_CMD(
 888         tlog,   2,      1,      do_temp_log,
 889         "tlog    - log contact temperature [1/100 C] to console (endlessly)\n",
 890         "delay\n"
 891         "    - contact temperature [1/100 C] is printed endlessly to console\n"
 892         "      <delay> specifies the seconds to wait between two measurements\n"
 893         "      For each measurment a timestamp is printeted\n"
 894 );
 895
 896 #endif