board/bc3450/cmd_bc3450.c

   1 /*
   2  * (C) Copyright 2005
   3  * Stefan Strobl, GERSYS GmbH, stefan.strobl@gersys.de
   4  *
   5  * (C) Copyright 2005
   6  * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <common.h>
  28 #include <command.h>
  29
  30 /*
  31  * BC3450 specific commands
  32  */
  33 #if defined(CONFIG_CMD_BSP)
  34
  35 #undef DEBUG
  36 #ifdef DEBUG
  37 # define dprintf(fmt,args...)   printf(fmt, ##args)
  38 #else
  39 # define dprintf(fmt,args...)
  40 #endif
  41
  42 /*
  43  * Definitions for DS1620 chip
  44  */
  45 #define THERM_START_CONVERT     0xee
  46 #define THERM_RESET             0xaf
  47 #define THERM_READ_CONFIG       0xac
  48 #define THERM_READ_TEMP         0xaa
  49 #define THERM_READ_TL           0xa2
  50 #define THERM_READ_TH           0xa1
  51 #define THERM_WRITE_CONFIG      0x0c
  52 #define THERM_WRITE_TL          0x02
  53 #define THERM_WRITE_TH          0x01
  54
  55 #define CFG_CPU                 2
  56 #define CFG_1SHOT               1
  57 #define CFG_STANDALONE          0
  58
  59 struct therm {
  60         int hi;
  61         int lo;
  62 };
  63
  64 /*
  65  * SM501 Register
  66  */
  67 #define SM501_GPIO_CTRL_LOW             0x00000008UL    /* gpio pins 0..31  */
  68 #define SM501_GPIO_CTRL_HIGH            0x0000000CUL    /* gpio pins 32..63 */
  69 #define SM501_POWER_MODE0_GATE          0x00000040UL
  70 #define SM501_POWER_MODE1_GATE          0x00000048UL
  71 #define POWER_MODE_GATE_GPIO_PWM_I2C    0x00000040UL
  72 #define SM501_GPIO_DATA_LOW             0x00010000UL
  73 #define SM501_GPIO_DATA_HIGH            0x00010004UL
  74 #define SM501_GPIO_DATA_DIR_LOW         0x00010008UL
  75 #define SM501_GPIO_DATA_DIR_HIGH        0x0001000CUL
  76 #define SM501_PANEL_DISPLAY_CONTROL     0x00080000UL
  77 #define SM501_CRT_DISPLAY_CONTROL       0x00080200UL
  78
  79 /* SM501 CRT Display Control Bits */
  80 #define SM501_CDC_SEL                   (1 << 9)
  81 #define SM501_CDC_TE                    (1 << 8)
  82 #define SM501_CDC_E                     (1 << 2)
  83
  84 /* SM501 Panel Display Control Bits */
  85 #define SM501_PDC_FPEN                  (1 << 27)
  86 #define SM501_PDC_BIAS                  (1 << 26)
  87 #define SM501_PDC_DATA                  (1 << 25)
  88 #define SM501_PDC_VDDEN                 (1 << 24)
  89
  90 /* SM501 GPIO Data LOW Bits */
  91 #define SM501_GPIO24                    0x01000000
  92 #define SM501_GPIO25                    0x02000000
  93 #define SM501_GPIO26                    0x04000000
  94 #define SM501_GPIO27                    0x08000000
  95 #define SM501_GPIO28                    0x10000000
  96 #define SM501_GPIO29                    0x20000000
  97 #define SM501_GPIO30                    0x40000000
  98 #define SM501_GPIO31                    0x80000000
  99
 100 /* SM501 GPIO Data HIGH Bits */
 101 #define SM501_GPIO46                    0x00004000
 102 #define SM501_GPIO47                    0x00008000
 103 #define SM501_GPIO48                    0x00010000
 104 #define SM501_GPIO49                    0x00020000
 105 #define SM501_GPIO50                    0x00040000
 106 #define SM501_GPIO51                    0x00080000
 107
 108 /* BC3450 GPIOs @ SM501 Data LOW */
 109 #define DIP                             (SM501_GPIO24 | SM501_GPIO25 | SM501_GPIO26 | SM501_GPIO27)
 110 #define DS1620_DQ                       SM501_GPIO29    /* I/O             */
 111 #define DS1620_CLK                      SM501_GPIO30    /* High active O/P */
 112 #define DS1620_RES                      SM501_GPIO31    /* Low active O/P  */
 113 /* BC3450 GPIOs @ SM501 Data HIGH */
 114 #define BUZZER                          SM501_GPIO47    /* Low active O/P  */
 115 #define DS1620_TLOW                     SM501_GPIO48    /* High active I/P */
 116 #define PWR_OFF                         SM501_GPIO49    /* Low active O/P  */
 117 #define FP_DATA_TRI                     SM501_GPIO50    /* High active O/P */
 118
 119
 120 /*
 121  * Initialise GPIO on SM501
 122  *
 123  * This function may be called from several other functions.
 124  * Yet, the initialisation sequence is executed only the first
 125  * time the function is called.
 126  */
 127 int sm501_gpio_init (void)
 128 {
 129         static int init_done = 0;
 130
 131         if (init_done) {
 132 /*      dprintf("sm501_gpio_init: nothing to be done.\n"); */
 133                 return 1;
 134         }
 135
 136         /* enable SM501 GPIO control (in both power modes) */
 137         *(vu_long *) (SM501_MMIO_BASE + SM501_POWER_MODE0_GATE) |=
 138                 POWER_MODE_GATE_GPIO_PWM_I2C;
 139         *(vu_long *) (SM501_MMIO_BASE + SM501_POWER_MODE1_GATE) |=
 140                 POWER_MODE_GATE_GPIO_PWM_I2C;
 141
 142         /* set up default O/Ps */
 143         *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) &=
 144                 ~(DS1620_RES | DS1620_CLK);
 145         *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) |= DS1620_DQ;
 146         *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) &=
 147                 ~(FP_DATA_TRI);
 148         *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) |=
 149                 (BUZZER | PWR_OFF);
 150
 151         /* configure directions for SM501 GPIO pins */
 152         *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_CTRL_LOW) &= ~(0xFF << 24);
 153         *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_CTRL_HIGH) &=
 154                 ~(0x3F << 14);
 155         *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_LOW) &=
 156                 ~(DIP | DS1620_DQ);
 157         *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_LOW) |=
 158                 (DS1620_RES | DS1620_CLK);
 159         *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_HIGH) &=
 160                 ~DS1620_TLOW;
 161         *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_HIGH) |=
 162                 (PWR_OFF | BUZZER | FP_DATA_TRI);
 163
 164         init_done = 1;
 165 /*  dprintf("sm501_gpio_init: done.\n"); */
 166         return 0;
 167 }
 168
 169
 170 /*
 171  * dip - read Config Inputs
 172  *
 173  * read and prints the dip switch
 174  * and/or external config inputs (4bits) 0...0x0F
 175  */
 176 int cmd_dip (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 177 {
 178         vu_long rc = 0;
 179
 180         sm501_gpio_init ();
 181
 182         /* read dip switch */
 183         rc = *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW);
 184         rc = ~rc;
 185         rc &= DIP;
 186         rc = (int) (rc >> 24);
 187
 188         /* plausibility check */
 189         if (rc > 0x0F)
 190                 return -1;
 191
 192         printf ("0x%x\n", rc);
 193         return 0;
 194 }
 195
 196 U_BOOT_CMD (dip, 1, 1, cmd_dip,
 197             "dip     - read dip switch and config inputs\n",
 198             "\n"
 199             "     - prints the state of the dip switch and/or\n"
 200             "       external configuration inputs as hex value.\n"
 201             "     - \"Config 1\" is the LSB\n");
 202
 203
 204 /*
 205  * buz - turns Buzzer on/off
 206  */
 207 #ifdef CONFIG_BC3450_BUZZER
 208 static int cmd_buz (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 209 {
 210         if (argc != 2) {
 211                 printf ("Usage:\nspecify one argument: \"on\" or \"off\"\n");
 212                 return 1;
 213         }
 214
 215         sm501_gpio_init ();
 216
 217         if (strncmp (argv[1], "on", 2) == 0) {
 218                 *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) &=
 219                         ~(BUZZER);
 220                 return 0;
 221         } else if (strncmp (argv[1], "off", 3) == 0) {
 222                 *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) |=
 223                         BUZZER;
 224                 return 0;
 225         }
 226         printf ("Usage:\nspecify one argument: \"on\" or \"off\"\n");
 227         return 1;
 228 }
 229
 230 U_BOOT_CMD (buz, 2, 1, cmd_buz,
 231             "buz     - turns buzzer on/off\n",
 232             "\n" "buz <on/off>\n" "     - turns the buzzer on or off\n");
 233 #endif /* CONFIG_BC3450_BUZZER */
 234
 235
 236 /*
 237  * fp - front panel commands
 238  */
 239 static int cmd_fp (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 240 {
 241         sm501_gpio_init ();
 242
 243         if (strncmp (argv[1], "on", 2) == 0) {
 244                 /* turn on VDD first */
 245                 *(vu_long *) (SM501_MMIO_BASE +
 246                               SM501_PANEL_DISPLAY_CONTROL) |= SM501_PDC_VDDEN;
 247                 udelay (1000);
 248                 /* then put data on */
 249                 *(vu_long *) (SM501_MMIO_BASE +
 250                               SM501_PANEL_DISPLAY_CONTROL) |= SM501_PDC_DATA;
 251                 /* wait some time and enable backlight */
 252                 udelay (1000);
 253                 *(vu_long *) (SM501_MMIO_BASE +
 254                               SM501_PANEL_DISPLAY_CONTROL) |= SM501_PDC_BIAS;
 255                 udelay (1000);
 256                 *(vu_long *) (SM501_MMIO_BASE +
 257                               SM501_PANEL_DISPLAY_CONTROL) |= SM501_PDC_FPEN;
 258                 return 0;
 259         } else if (strncmp (argv[1], "off", 3) == 0) {
 260                 /* turn off the backlight first */
 261                 *(vu_long *) (SM501_MMIO_BASE +
 262                               SM501_PANEL_DISPLAY_CONTROL) &= ~SM501_PDC_FPEN;
 263                 udelay (1000);
 264                 *(vu_long *) (SM501_MMIO_BASE +
 265                               SM501_PANEL_DISPLAY_CONTROL) &= ~SM501_PDC_BIAS;
 266                 udelay (200000);
 267                 /* wait some time, then remove data */
 268                 *(vu_long *) (SM501_MMIO_BASE +
 269                               SM501_PANEL_DISPLAY_CONTROL) &= ~SM501_PDC_DATA;
 270                 udelay (1000);
 271                 /* and remove VDD last */
 272                 *(vu_long *) (SM501_MMIO_BASE +
 273                               SM501_PANEL_DISPLAY_CONTROL) &=
 274                         ~SM501_PDC_VDDEN;
 275                 return 0;
 276         } else if (strncmp (argv[1], "bl", 2) == 0) {
 277                 /* turn on/off backlight only */
 278                 if (strncmp (argv[2], "on", 2) == 0) {
 279                         *(vu_long *) (SM501_MMIO_BASE +
 280                                       SM501_PANEL_DISPLAY_CONTROL) |=
 281                                 SM501_PDC_BIAS;
 282                         udelay (1000);
 283                         *(vu_long *) (SM501_MMIO_BASE +
 284                                       SM501_PANEL_DISPLAY_CONTROL) |=
 285                                 SM501_PDC_FPEN;
 286                         return 0;
 287                 } else if (strncmp (argv[2], "off", 3) == 0) {
 288                         *(vu_long *) (SM501_MMIO_BASE +
 289                                       SM501_PANEL_DISPLAY_CONTROL) &=
 290                                 ~SM501_PDC_FPEN;
 291                         udelay (1000);
 292                         *(vu_long *) (SM501_MMIO_BASE +
 293                                       SM501_PANEL_DISPLAY_CONTROL) &=
 294                                 ~SM501_PDC_BIAS;
 295                         return 0;
 296                 }
 297         }
 298 #ifdef CONFIG_BC3450_CRT
 299         else if (strncmp (argv[1], "crt", 3) == 0) {
 300                 /* enables/disables the crt output (debug only) */
 301                 if (strncmp (argv[2], "on", 2) == 0) {
 302                         *(vu_long *) (SM501_MMIO_BASE +
 303                                       SM501_CRT_DISPLAY_CONTROL) |=
 304                                 (SM501_CDC_TE | SM501_CDC_E);
 305                         *(vu_long *) (SM501_MMIO_BASE +
 306                                       SM501_CRT_DISPLAY_CONTROL) &=
 307                                 ~SM501_CDC_SEL;
 308                         return 0;
 309                 } else if (strncmp (argv[2], "off", 3) == 0) {
 310                         *(vu_long *) (SM501_MMIO_BASE +
 311                                       SM501_CRT_DISPLAY_CONTROL) &=
 312                                 ~(SM501_CDC_TE | SM501_CDC_E);
 313                         *(vu_long *) (SM501_MMIO_BASE +
 314                                       SM501_CRT_DISPLAY_CONTROL) |=
 315                                 SM501_CDC_SEL;
 316                         return 0;
 317                 }
 318         }
 319 #endif /* CONFIG_BC3450_CRT */
 320         printf ("Usage:%s\n", cmdtp->help);
 321         return 1;
 322 }
 323
 324 U_BOOT_CMD (fp, 3, 1, cmd_fp,
 325             "fp      - front panes access functions\n",
 326             "\n"
 327             "fp bl <on/off>\n"
 328             "     - turns the CCFL backlight of the display on/off\n"
 329             "fp <on/off>\n" "     - turns the whole display on/off\n"
 330 #ifdef CONFIG_BC3450_CRT
 331             "fp crt <on/off>\n"
 332             "     - enables/disables the crt output (debug only)\n"
 333 #endif /* CONFIG_BC3450_CRT */
 334         );
 335
 336
 337 /*
 338  * temp - DS1620 thermometer
 339  */
 340 /* GERSYS BC3450 specific functions */
 341 static inline void bc_ds1620_set_clk (int clk)
 342 {
 343         if (clk)
 344                 *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) |=
 345                         DS1620_CLK;
 346         else
 347                 *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) &=
 348                         ~DS1620_CLK;
 349 }
 350
 351 static inline void bc_ds1620_set_data (int dat)
 352 {
 353         if (dat)
 354                 *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) |=
 355                         DS1620_DQ;
 356         else
 357                 *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) &=
 358                         ~DS1620_DQ;
 359 }
 360
 361 static inline int bc_ds1620_get_data (void)
 362 {
 363         vu_long rc;
 364
 365         rc = *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW);
 366         rc &= DS1620_DQ;
 367         if (rc != 0)
 368                 rc = 1;
 369         return (int) rc;
 370 }
 371
 372 static inline void bc_ds1620_set_data_dir (int dir)
 373 {
 374         if (dir)                /* in */
 375                 *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_LOW) &= ~DS1620_DQ;
 376         else                    /* out */
 377                 *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_LOW) |= DS1620_DQ;
 378 }
 379
 380 static inline void bc_ds1620_set_reset (int res)
 381 {
 382         if (res)
 383                 *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) |= DS1620_RES;
 384         else
 385                 *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) &= ~DS1620_RES;
 386 }
 387
 388 /* hardware independent functions */
 389 static void ds1620_send_bits (int nr, int value)
 390 {
 391         int i;
 392
 393         for (i = 0; i < nr; i++) {
 394                 bc_ds1620_set_data (value & 1);
 395                 bc_ds1620_set_clk (0);
 396                 udelay (1);
 397                 bc_ds1620_set_clk (1);
 398                 udelay (1);
 399
 400                 value >>= 1;
 401         }
 402 }
 403
 404 static unsigned int ds1620_recv_bits (int nr)
 405 {
 406         unsigned int value = 0, mask = 1;
 407         int i;
 408
 409         bc_ds1620_set_data (0);
 410
 411         for (i = 0; i < nr; i++) {
 412                 bc_ds1620_set_clk (0);
 413                 udelay (1);
 414
 415                 if (bc_ds1620_get_data ())
 416                         value |= mask;
 417
 418                 mask <<= 1;
 419
 420                 bc_ds1620_set_clk (1);
 421                 udelay (1);
 422         }
 423
 424         return value;
 425 }
 426
 427 static void ds1620_out (int cmd, int bits, int value)
 428 {
 429         bc_ds1620_set_clk (1);
 430         bc_ds1620_set_data_dir (0);
 431
 432         bc_ds1620_set_reset (0);
 433         udelay (1);
 434         bc_ds1620_set_reset (1);
 435
 436         udelay (1);
 437
 438         ds1620_send_bits (8, cmd);
 439         if (bits)
 440                 ds1620_send_bits (bits, value);
 441
 442         udelay (1);
 443
 444         /* go stand alone */
 445         bc_ds1620_set_data_dir (1);
 446         bc_ds1620_set_reset (0);
 447         bc_ds1620_set_clk (0);
 448
 449         udelay (10000);
 450 }
 451
 452 static unsigned int ds1620_in (int cmd, int bits)
 453 {
 454         unsigned int value;
 455
 456         bc_ds1620_set_clk (1);
 457         bc_ds1620_set_data_dir (0);
 458
 459         bc_ds1620_set_reset (0);
 460         udelay (1);
 461         bc_ds1620_set_reset (1);
 462
 463         udelay (1);
 464
 465         ds1620_send_bits (8, cmd);
 466
 467         bc_ds1620_set_data_dir (1);
 468         value = ds1620_recv_bits (bits);
 469
 470         /* go stand alone */
 471         bc_ds1620_set_data_dir (1);
 472         bc_ds1620_set_reset (0);
 473         bc_ds1620_set_clk (0);
 474
 475         return value;
 476 }
 477
 478 static int cvt_9_to_int (unsigned int val)
 479 {
 480         if (val & 0x100)
 481                 val |= 0xfffffe00;
 482
 483         return val;
 484 }
 485
 486 /* set thermostate thresholds */
 487 static void ds1620_write_state (struct therm *therm)
 488 {
 489         ds1620_out (THERM_WRITE_TL, 9, therm->lo);
 490         ds1620_out (THERM_WRITE_TH, 9, therm->hi);
 491         ds1620_out (THERM_START_CONVERT, 0, 0);
 492 }
 493
 494 static int cmd_temp (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 495 {
 496         int i;
 497         struct therm therm;
 498
 499         sm501_gpio_init ();
 500
 501         /* print temperature */
 502         if (argc == 1) {
 503                 i = cvt_9_to_int (ds1620_in (THERM_READ_TEMP, 9));
 504                 printf ("%d.%d C\n", i >> 1, i & 1 ? 5 : 0);
 505                 return 0;
 506         }
 507
 508         /* set to default operation */
 509         if (strncmp (argv[1], "set", 3) == 0) {
 510                 if (strncmp (argv[2], "default", 3) == 0) {
 511                         therm.hi = +88;
 512                         therm.lo = -20;
 513                         therm.hi <<= 1;
 514                         therm.lo <<= 1;
 515                         ds1620_write_state (&therm);
 516                         ds1620_out (THERM_WRITE_CONFIG, 8, CFG_STANDALONE);
 517                         return 0;
 518                 }
 519         }
 520
 521         printf ("Usage:%s\n", cmdtp->help);
 522         return 1;
 523 }
 524
 525 U_BOOT_CMD (temp, 3, 1, cmd_temp,
 526             "temp    - print current temperature\n",
 527             "\n" "temp\n" "     - print current temperature\n");
 528
 529 #ifdef CONFIG_BC3450_CAN
 530 /*
 531  * Initialise CAN interface
 532  *
 533  * return 1 on CAN initialization failure
 534  * return 0 if no failure
 535  */
 536 int can_init (void)
 537 {
 538         static int init_done = 0;
 539         int i;
 540         struct mpc5xxx_mscan *can1 =
 541                 (struct mpc5xxx_mscan *) (CFG_MBAR + 0x0900);
 542         struct mpc5xxx_mscan *can2 =
 543                 (struct mpc5xxx_mscan *) (CFG_MBAR + 0x0980);
 544
 545         /* GPIO configuration of the CAN pins is done in BC3450.h */
 546
 547         if (!init_done) {
 548                 /* init CAN 1 */
 549                 can1->canctl1 |= 0x80;  /* CAN enable */
 550                 udelay (100);
 551
 552                 i = 0;
 553                 can1->canctl0 |= 0x02;  /* sleep mode */
 554                 /* wait until sleep mode reached */
 555                 while (!(can1->canctl1 & 0x02)) {
 556                         udelay (10);
 557                         i++;
 558                         if (i == 10) {
 559                                 printf ("%s: CAN1 initialize error, "
 560                                         "can not enter sleep mode!\n",
 561                                         __FUNCTION__);
 562                                 return 1;
 563                         }
 564                 }
 565                 i = 0;
 566                 can1->canctl0 = 0x01;   /* enter init mode */
 567                 /* wait until init mode reached */
 568                 while (!(can1->canctl1 & 0x01)) {
 569                         udelay (10);
 570                         i++;
 571                         if (i == 10) {
 572                                 printf ("%s: CAN1 initialize error, "
 573                                         "can not enter init mode!\n",
 574                                         __FUNCTION__);
 575                                 return 1;
 576                         }
 577                 }
 578                 can1->canctl1 = 0x80;
 579                 can1->canctl1 |= 0x40;
 580                 can1->canbtr0 = 0x0F;
 581                 can1->canbtr1 = 0x7F;
 582                 can1->canidac &= ~(0x30);
 583                 can1->canidar1 = 0x00;
 584                 can1->canidar3 = 0x00;
 585                 can1->canidar5 = 0x00;
 586                 can1->canidar7 = 0x00;
 587                 can1->canidmr0 = 0xFF;
 588                 can1->canidmr1 = 0xFF;
 589                 can1->canidmr2 = 0xFF;
 590                 can1->canidmr3 = 0xFF;
 591                 can1->canidmr4 = 0xFF;
 592                 can1->canidmr5 = 0xFF;
 593                 can1->canidmr6 = 0xFF;
 594                 can1->canidmr7 = 0xFF;
 595
 596                 i = 0;
 597                 can1->canctl0 &= ~(0x01);       /* leave init mode */
 598                 can1->canctl0 &= ~(0x02);
 599                 /* wait until init and sleep mode left */
 600                 while ((can1->canctl1 & 0x01) || (can1->canctl1 & 0x02)) {
 601                         udelay (10);
 602                         i++;
 603                         if (i == 10) {
 604                                 printf ("%s: CAN1 initialize error, "
 605                                         "can not leave init/sleep mode!\n",
 606                                         __FUNCTION__);
 607                                 return 1;
 608                         }
 609                 }
 610
 611                 /* init CAN 2 */
 612                 can2->canctl1 |= 0x80;  /* CAN enable */
 613                 udelay (100);
 614
 615                 i = 0;
 616                 can2->canctl0 |= 0x02;  /* sleep mode */
 617                 /* wait until sleep mode reached */
 618                 while (!(can2->canctl1 & 0x02)) {
 619                         udelay (10);
 620                         i++;
 621                         if (i == 10) {
 622                                 printf ("%s: CAN2 initialize error, "
 623                                         "can not enter sleep mode!\n",
 624                                         __FUNCTION__);
 625                                 return 1;
 626                         }
 627                 }
 628                 i = 0;
 629                 can2->canctl0 = 0x01;   /* enter init mode */
 630                 /* wait until init mode reached */
 631                 while (!(can2->canctl1 & 0x01)) {
 632                         udelay (10);
 633                         i++;
 634                         if (i == 10) {
 635                                 printf ("%s: CAN2 initialize error, "
 636                                         "can not enter init mode!\n",
 637                                         __FUNCTION__);
 638                                 return 1;
 639                         }
 640                 }
 641                 can2->canctl1 = 0x80;
 642                 can2->canctl1 |= 0x40;
 643                 can2->canbtr0 = 0x0F;
 644                 can2->canbtr1 = 0x7F;
 645                 can2->canidac &= ~(0x30);
 646                 can2->canidar1 = 0x00;
 647                 can2->canidar3 = 0x00;
 648                 can2->canidar5 = 0x00;
 649                 can2->canidar7 = 0x00;
 650                 can2->canidmr0 = 0xFF;
 651                 can2->canidmr1 = 0xFF;
 652                 can2->canidmr2 = 0xFF;
 653                 can2->canidmr3 = 0xFF;
 654                 can2->canidmr4 = 0xFF;
 655                 can2->canidmr5 = 0xFF;
 656                 can2->canidmr6 = 0xFF;
 657                 can2->canidmr7 = 0xFF;
 658                 can2->canctl0 &= ~(0x01);       /* leave init mode */
 659                 can2->canctl0 &= ~(0x02);
 660
 661                 i = 0;
 662                 /* wait until init mode left */
 663                 while ((can2->canctl1 & 0x01) || (can2->canctl1 & 0x02)) {
 664                         udelay (10);
 665                         i++;
 666                         if (i == 10) {
 667                                 printf ("%s: CAN2 initialize error, "
 668                                         "can not leave init/sleep mode!\n",
 669                                         __FUNCTION__);
 670                                 return 1;
 671                         }
 672                 }
 673                 init_done = 1;
 674         }
 675         return 0;
 676 }
 677
 678 /*
 679  * Do CAN test
 680  * by sending message between CAN1 and CAN2
 681  *
 682  * return 1 on CAN failure
 683  * return 0 if no failure
 684  */
 685 int do_can (char *argv[])
 686 {
 687         int i;
 688         struct mpc5xxx_mscan *can1 =
 689                 (struct mpc5xxx_mscan *) (CFG_MBAR + 0x0900);
 690         struct mpc5xxx_mscan *can2 =
 691                 (struct mpc5xxx_mscan *) (CFG_MBAR + 0x0980);
 692
 693         /* send a message on CAN1 */
 694         can1->cantbsel = 0x01;
 695         can1->cantxfg.idr[0] = 0x55;
 696         can1->cantxfg.idr[1] = 0x00;
 697         can1->cantxfg.idr[1] &= ~0x8;
 698         can1->cantxfg.idr[1] &= ~0x10;
 699         can1->cantxfg.dsr[0] = 0xCC;
 700         can1->cantxfg.dlr = 1;
 701         can1->cantxfg.tbpr = 0;
 702         can1->cantflg = 0x01;
 703
 704         i = 0;
 705         while ((can1->cantflg & 0x01) == 0) {
 706                 i++;
 707                 if (i == 10) {
 708                         printf ("%s: CAN1 send timeout, "
 709                                 "can not send message!\n", __FUNCTION__);
 710                         return 1;
 711                 }
 712                 udelay (1000);
 713         }
 714         udelay (1000);
 715
 716         i = 0;
 717         while (!(can2->canrflg & 0x01)) {
 718                 i++;
 719                 if (i == 10) {
 720                         printf ("%s: CAN2 receive timeout, "
 721                                 "no message received!\n", __FUNCTION__);
 722                         return 1;
 723                 }
 724                 udelay (1000);
 725         }
 726
 727         if (can2->canrxfg.dsr[0] != 0xCC) {
 728                 printf ("%s: CAN2 receive error, "
 729                         "data mismatch!\n", __FUNCTION__);
 730                 return 1;
 731         }
 732
 733         /* send a message on CAN2 */
 734         can2->cantbsel = 0x01;
 735         can2->cantxfg.idr[0] = 0x55;
 736         can2->cantxfg.idr[1] = 0x00;
 737         can2->cantxfg.idr[1] &= ~0x8;
 738         can2->cantxfg.idr[1] &= ~0x10;
 739         can2->cantxfg.dsr[0] = 0xCC;
 740         can2->cantxfg.dlr = 1;
 741         can2->cantxfg.tbpr = 0;
 742         can2->cantflg = 0x01;
 743
 744         i = 0;
 745         while ((can2->cantflg & 0x01) == 0) {
 746                 i++;
 747                 if (i == 10) {
 748                         printf ("%s: CAN2 send error, "
 749                                 "can not send message!\n", __FUNCTION__);
 750                         return 1;
 751                 }
 752                 udelay (1000);
 753         }
 754         udelay (1000);
 755
 756         i = 0;
 757         while (!(can1->canrflg & 0x01)) {
 758                 i++;
 759                 if (i == 10) {
 760                         printf ("%s: CAN1 receive timeout, "
 761                                 "no message received!\n", __FUNCTION__);
 762                         return 1;
 763                 }
 764                 udelay (1000);
 765         }
 766
 767         if (can1->canrxfg.dsr[0] != 0xCC) {
 768                 printf ("%s: CAN1 receive error 0x%02x\n",
 769                         __FUNCTION__, (can1->canrxfg.dsr[0]));
 770                 return 1;
 771         }
 772
 773         return 0;
 774 }
 775 #endif /* CONFIG_BC3450_CAN */
 776
 777 /*
 778  * test - BC3450 HW test routines
 779  */
 780 int cmd_test (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 781 {
 782 #ifdef CONFIG_BC3450_CAN
 783         int rcode;
 784
 785         can_init ();
 786 #endif /* CONFIG_BC3450_CAN */
 787
 788         sm501_gpio_init ();
 789
 790         if (argc != 2) {
 791                 printf ("Usage:%s\n", cmdtp->help);
 792                 return 1;
 793         }
 794
 795         if (strncmp (argv[1], "unit-off", 8) == 0) {
 796                 printf ("waiting 2 seconds...\n");
 797                 udelay (2000000);
 798                 *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) &=
 799                         ~PWR_OFF;
 800                 return 0;
 801         }
 802 #ifdef CONFIG_BC3450_CAN
 803         else if (strncmp (argv[1], "can", 2) == 0) {
 804                 rcode = do_can (argv);
 805                 if (simple_strtoul (argv[2], NULL, 10) == 2) {
 806                         if (rcode == 0)
 807                                 printf ("OK\n");
 808                         else
 809                                 printf ("Error\n");
 810                 }
 811                 return rcode;
 812         }
 813 #endif /* CONFIG_BC3450_CAN */
 814
 815         printf ("Usage:%s\n", cmdtp->help);
 816         return 1;
 817 }
 818
 819 U_BOOT_CMD (test, 2, 1, cmd_test, "test    - unit test routines\n", "\n"
 820 #ifdef CONFIG_BC3450_CAN
 821             "test can\n"
 822             "     - connect CAN1 (X8) with CAN2 (X9) for this test\n"
 823 #endif /* CONFIG_BC3450_CAN */
 824             "test unit-off\n"
 825             "     - turns off the BC3450 unit\n"
 826             "       WARNING: Unsaved environment variables will be lost!\n");
 827 #endif