drivers/misc/gsc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2022 Gateworks Corporation
   4  */
   5
   6 #include <command.h>
   7 #include <gsc.h>
   8 #include <i2c.h>
   9 #include <rtc.h>
  10 #include <asm/unaligned.h>
  11 #include <linux/delay.h>
  12 #include <dm/device.h>
  13 #include <dm/device-internal.h>
  14 #include <dm/ofnode.h>
  15 #include <dm/read.h>
  16
  17 #define GSC_BUSNO       0
  18 #define GSC_SC_ADDR     0x20
  19 #define GSC_HWMON_ADDR  0x29
  20 #define GSC_RTC_ADDR    0x68
  21
  22 /* System Controller registers */
  23 enum {
  24         GSC_SC_CTRL0            = 0,
  25         GSC_SC_CTRL1            = 1,
  26         GSC_SC_TIME             = 2,
  27         GSC_SC_TIME_ADD         = 6,
  28         GSC_SC_STATUS           = 10,
  29         GSC_SC_FWCRC            = 12,
  30         GSC_SC_FWVER            = 14,
  31         GSC_SC_WP               = 15,
  32         GSC_SC_RST_CAUSE        = 16,
  33         GSC_SC_THERM_PROTECT    = 19,
  34 };
  35
  36 /* System Controller Control1 bits */
  37 enum {
  38         GSC_SC_CTRL1_SLEEP_EN           = 0, /* 1 = enable sleep */
  39         GSC_SC_CTRL1_SLEEP_ACTIVATE     = 1, /* 1 = activate sleep */
  40         GSC_SC_CTRL1_SLEEP_ADD          = 2, /* 1 = latch and add sleep time */
  41         GSC_SC_CTRL1_SLEEP_NOWAKEPB     = 3, /* 1 = do not wake on sleep on button press */
  42         GSC_SC_CTRL1_WDTIME             = 4, /* 1 = 60s timeout, 0 = 30s timeout */
  43         GSC_SC_CTRL1_WDEN               = 5, /* 1 = enable, 0 = disable */
  44         GSC_SC_CTRL1_BOOT_CHK           = 6, /* 1 = enable alt boot check */
  45         GSC_SC_CTRL1_WDDIS              = 7, /* 1 = disable boot watchdog */
  46 };
  47
  48 /* System Controller Interrupt bits */
  49 enum {
  50         GSC_SC_IRQ_PB           = 0, /* Pushbutton switch */
  51         GSC_SC_IRQ_SECURE       = 1, /* Secure Key erase operation complete */
  52         GSC_SC_IRQ_EEPROM_WP    = 2, /* EEPROM write violation */
  53         GSC_SC_IRQ_GPIO         = 4, /* GPIO change */
  54         GSC_SC_IRQ_TAMPER       = 5, /* Tamper detect */
  55         GSC_SC_IRQ_WATCHDOG     = 6, /* Watchdog trip */
  56         GSC_SC_IRQ_PBLONG       = 7, /* Pushbutton long hold */
  57 };
  58
  59 /* System Controller WP bits */
  60 enum {
  61         GSC_SC_WP_ALL           = 0, /* Write Protect All EEPROM regions */
  62         GSC_SC_WP_BOARDINFO     = 1, /* Write Protect Board Info region */
  63 };
  64
  65 /* System Controller Reset Cause */
  66 enum {
  67         GSC_SC_RST_CAUSE_VIN            = 0,
  68         GSC_SC_RST_CAUSE_PB             = 1,
  69         GSC_SC_RST_CAUSE_WDT            = 2,
  70         GSC_SC_RST_CAUSE_CPU            = 3,
  71         GSC_SC_RST_CAUSE_TEMP_LOCAL     = 4,
  72         GSC_SC_RST_CAUSE_TEMP_REMOTE    = 5,
  73         GSC_SC_RST_CAUSE_SLEEP          = 6,
  74         GSC_SC_RST_CAUSE_BOOT_WDT       = 7,
  75         GSC_SC_RST_CAUSE_BOOT_WDT_MAN   = 8,
  76         GSC_SC_RST_CAUSE_SOFT_PWR       = 9,
  77         GSC_SC_RST_CAUSE_MAX            = 10,
  78 };
  79
  80 #if CONFIG_IS_ENABLED(DM_I2C)
  81
  82 struct gsc_priv {
  83         int gscver;
  84         int fwver;
  85         int fwcrc;
  86         struct udevice *hwmon;
  87         struct udevice *rtc;
  88 };
  89
  90 /*
  91  * GSCv2 will fail to ACK an I2C transaction if it is busy, which can occur
  92  * during its 1HZ timer tick while reading ADC's. When this does occur,
  93  * it will never be busy longer than 2 back-to-back transfers so retry 3 times.
  94  */
  95 static int gsc_i2c_read(struct udevice *dev, uint addr, u8 *buf, int len)
  96 {
  97         struct gsc_priv *priv = dev_get_priv(dev);
  98         int retry = (priv->gscver == 3) ? 1 : 3;
  99         int n = 0;
 100         int ret;
 101
 102         while (n++ < retry) {
 103                 ret = dm_i2c_read(dev, addr, buf, len);
 104                 if (!ret)
 105                         break;
 106                 if (ret != -EREMOTEIO)
 107                         break;
 108                 mdelay(10);
 109         }
 110         return ret;
 111 }
 112
 113 static int gsc_i2c_write(struct udevice *dev, uint addr, const u8 *buf, int len)
 114 {
 115         struct gsc_priv *priv = dev_get_priv(dev);
 116         int retry = (priv->gscver == 3) ? 1 : 3;
 117         int n = 0;
 118         int ret;
 119
 120         while (n++ < retry) {
 121                 ret = dm_i2c_write(dev, addr, buf, len);
 122                 if (!ret)
 123                         break;
 124                 if (ret != -EREMOTEIO)
 125                         break;
 126                 mdelay(10);
 127         }
 128         return ret;
 129 }
 130
 131 static struct udevice *gsc_get_dev(int busno, int slave)
 132 {
 133         struct udevice *dev, *bus;
 134         int ret;
 135
 136         ret = uclass_get_device_by_seq(UCLASS_I2C, busno, &bus);
 137         if (ret)
 138                 return NULL;
 139         ret = dm_i2c_probe(bus, slave, 0, &dev);
 140         if (ret)
 141                 return NULL;
 142
 143         return dev;
 144 }
 145
 146 static int gsc_thermal_get_info(struct udevice *dev, u8 *outreg, int *tmax, bool *enable)
 147 {
 148         struct gsc_priv *priv = dev_get_priv(dev);
 149         int ret;
 150         u8 reg;
 151
 152         if (priv->gscver > 2 && priv->fwver > 52) {
 153                 ret = gsc_i2c_read(dev, GSC_SC_THERM_PROTECT, &reg, 1);
 154                 if (!ret) {
 155                         if (outreg)
 156                                 *outreg = reg;
 157                         if (tmax) {
 158                                 *tmax = ((reg & 0xf8) >> 3) * 2;
 159                                 if (*tmax)
 160                                         *tmax += 70;
 161                                 else
 162                                         *tmax = 120;
 163                         }
 164                         if (enable)
 165                                 *enable = reg & 1;
 166                 }
 167         } else {
 168                 ret = -ENODEV;
 169         }
 170
 171         return ret;
 172 }
 173
 174 static int gsc_thermal_get_temp(struct udevice *dev)
 175 {
 176         struct gsc_priv *priv = dev_get_priv(dev);
 177         u32 reg, mode, val;
 178         const char *label;
 179         ofnode node;
 180         u8 buf[2];
 181
 182         ofnode_for_each_subnode(node, dev_read_subnode(dev, "adc")) {
 183                 if (ofnode_read_u32(node, "reg", &reg))
 184                         reg = -1;
 185                 if (ofnode_read_u32(node, "gw,mode", &mode))
 186                         mode = -1;
 187                 label = ofnode_read_string(node, "label");
 188
 189                 if ((reg == -1) || (mode == -1) || !label)
 190                         continue;
 191
 192                 if (mode != 0 || strcmp(label, "temp"))
 193                         continue;
 194
 195                 memset(buf, 0, sizeof(buf));
 196                 if (!gsc_i2c_read(priv->hwmon, reg, buf, sizeof(buf))) {
 197                         val = buf[0] | buf[1] << 8;
 198                         if (val > 0x8000)
 199                                 val -= 0xffff;
 200                         return val;
 201                 }
 202         }
 203
 204         return 0;
 205 }
 206
 207 static void gsc_thermal_info(struct udevice *dev)
 208 {
 209         struct gsc_priv *priv = dev_get_priv(dev);
 210
 211         switch (priv->gscver) {
 212         case 2:
 213                 printf("board_temp:%dC ", gsc_thermal_get_temp(dev) / 10);
 214                 break;
 215         case 3:
 216                 if (priv->fwver > 52) {
 217                         bool enabled;
 218                         int tmax;
 219
 220                         if (!gsc_thermal_get_info(dev, NULL, &tmax, &enabled)) {
 221                                 puts("Thermal protection:");
 222                                 if (enabled)
 223                                         printf("enabled at %dC ", tmax);
 224                                 else
 225                                         puts("disabled ");
 226                         }
 227                 }
 228                 break;
 229         }
 230 }
 231
 232 static void gsc_reset_info(struct udevice *dev)
 233 {
 234         struct gsc_priv *priv = dev_get_priv(dev);
 235         static const char * const names[] = {
 236                 "VIN",
 237                 "PB",
 238                 "WDT",
 239                 "CPU",
 240                 "TEMP_L",
 241                 "TEMP_R",
 242                 "SLEEP",
 243                 "BOOT_WDT1",
 244                 "BOOT_WDT2",
 245                 "SOFT_PWR",
 246         };
 247         u8 reg;
 248
 249         /* reset cause */
 250         switch (priv->gscver) {
 251         case 2:
 252                 if (!gsc_i2c_read(dev, GSC_SC_STATUS, &reg, 1)) {
 253                         if (reg & BIT(GSC_SC_IRQ_WATCHDOG)) {
 254                                 puts("RST:WDT");
 255                                 reg &= ~BIT(GSC_SC_IRQ_WATCHDOG);
 256                                 gsc_i2c_write(dev, GSC_SC_STATUS, &reg, 1);
 257                         } else {
 258                                 puts("RST:VIN");
 259                         }
 260                         printf(" WDT:%sabled ",
 261                                (reg & BIT(GSC_SC_CTRL1_WDEN)) ? "en" : "dis");
 262                 }
 263                 break;
 264         case 3:
 265                 if (priv->fwver > 52 &&
 266                     !gsc_i2c_read(dev, GSC_SC_RST_CAUSE, &reg, 1)) {
 267                         puts("RST:");
 268                         if (reg < ARRAY_SIZE(names))
 269                                 printf("%s ", names[reg]);
 270                         else
 271                                 printf("0x%02x ", reg);
 272                 }
 273                 break;
 274         }
 275 }
 276
 277 /* display hardware monitor ADC channels */
 278 static int gsc_hwmon(struct udevice *dev)
 279 {
 280         struct gsc_priv *priv = dev_get_priv(dev);
 281         u32 reg, mode, val, offset;
 282         const char *label;
 283         ofnode node;
 284         u8 buf[2];
 285         u32 r[2];
 286         int ret;
 287
 288         /* iterate over hwmon nodes */
 289         ofnode_for_each_subnode(node, dev_read_subnode(dev, "adc")) {
 290                 if (ofnode_read_u32(node, "reg", &reg))
 291                         reg = -1;
 292                 if (ofnode_read_u32(node, "gw,mode", &mode))
 293                         mode = -1;
 294                 label = ofnode_read_string(node, "label");
 295                 if ((reg == -1) || (mode == -1) || !label)
 296                         continue;
 297
 298                 memset(buf, 0, sizeof(buf));
 299                 ret = gsc_i2c_read(priv->hwmon, reg, buf, sizeof(buf));
 300                 if (ret) {
 301                         printf("i2c error: %d\n", ret);
 302                         continue;
 303                 }
 304                 val = buf[0] | buf[1] << 8;
 305
 306                 switch (mode) {
 307                 case 0: /* temperature (C*10) */
 308                         if (val > 0x8000)
 309                                 val -= 0xffff;
 310                         printf("%-8s: %d.%ldC\n", label, val / 10, abs(val % 10));
 311                         break;
 312                 case 1: /* prescaled voltage */
 313                         if (val != 0xffff)
 314                                 printf("%-8s: %d.%03dV\n", label, val / 1000, val % 1000);
 315                         break;
 316                 case 2: /* scaled based on ref volt and resolution */
 317                         val *= 2500;
 318                         val /= 1 << 12;
 319
 320                         /* apply pre-scaler voltage divider */
 321                         if (!ofnode_read_u32_index(node, "gw,voltage-divider-ohms", 0, &r[0]) &&
 322                             !ofnode_read_u32_index(node, "gw,voltage-divider-ohms", 1, &r[1]) &&
 323                             r[0] && r[1]) {
 324                                 val *= (r[0] + r[1]);
 325                                 val /= r[1];
 326                         }
 327
 328                         /* adjust by offset */
 329                         val += (offset / 1000);
 330
 331                         printf("%-8s: %d.%03dV\n", label, val / 1000, val % 1000);
 332                         break;
 333                 }
 334         }
 335
 336         return 0;
 337 }
 338
 339 static int gsc_banner(struct udevice *dev)
 340 {
 341         struct gsc_priv *priv = dev_get_priv(dev);
 342
 343         /* banner */
 344         printf("GSCv%d   : v%d 0x%04x ", priv->gscver, priv->fwver, priv->fwcrc);
 345         gsc_reset_info(dev);
 346         gsc_thermal_info(dev);
 347         puts("\n");
 348
 349         /* Display RTC */
 350         if (priv->rtc) {
 351                 u8 buf[4];
 352                 time_t timestamp;
 353                 struct rtc_time tm;
 354
 355                 if (!gsc_i2c_read(priv->rtc, 0, buf, 4)) {
 356                         timestamp = get_unaligned_le32(buf);
 357                         rtc_to_tm(timestamp, &tm);
 358                         printf("RTC     : %4d-%02d-%02d  %2d:%02d:%02d UTC\n",
 359                                tm.tm_year, tm.tm_mon, tm.tm_mday,
 360                                tm.tm_hour, tm.tm_min, tm.tm_sec);
 361                 }
 362         }
 363
 364         return 0;
 365 }
 366
 367 static int gsc_probe(struct udevice *dev)
 368 {
 369         struct gsc_priv *priv = dev_get_priv(dev);
 370         u8 buf[32];
 371         int ret;
 372
 373         ret = gsc_i2c_read(dev, 0, buf, sizeof(buf));
 374         if (ret)
 375                 return ret;
 376
 377         /*
 378          * GSC chip version:
 379          *   GSCv2 has 16 registers (which overlap)
 380          *   GSCv3 has 32 registers
 381          */
 382         priv->gscver = memcmp(buf, buf + 16, 16) ? 3 : 2;
 383         priv->fwver = buf[GSC_SC_FWVER];
 384         priv->fwcrc = buf[GSC_SC_FWCRC] | buf[GSC_SC_FWCRC + 1] << 8;
 385         priv->hwmon = gsc_get_dev(GSC_BUSNO, GSC_HWMON_ADDR);
 386         if (priv->hwmon)
 387                 dev_set_priv(priv->hwmon, priv);
 388         priv->rtc = gsc_get_dev(GSC_BUSNO, GSC_RTC_ADDR);
 389         if (priv->rtc)
 390                 dev_set_priv(priv->rtc, priv);
 391
 392 #ifdef CONFIG_XPL_BUILD
 393         gsc_banner(dev);
 394 #endif
 395
 396         return 0;
 397 };
 398
 399 static const struct udevice_id gsc_ids[] = {
 400         { .compatible = "gw,gsc", },
 401         { }
 402 };
 403
 404 U_BOOT_DRIVER(gsc) = {
 405         .name = "gsc",
 406         .id = UCLASS_MISC,
 407         .of_match = gsc_ids,
 408         .probe = gsc_probe,
 409         .priv_auto      = sizeof(struct gsc_priv),
 410         .flags = DM_FLAG_PRE_RELOC,
 411 };
 412
 413 static int gsc_sleep(struct udevice *dev, unsigned long secs)
 414 {
 415         u8 regs[4];
 416         int ret;
 417
 418         printf("GSC Sleeping for %ld seconds\n", secs);
 419         put_unaligned_le32(secs, regs);
 420         ret = gsc_i2c_write(dev, GSC_SC_TIME_ADD, regs, sizeof(regs));
 421         if (ret)
 422                 goto err;
 423         ret = gsc_i2c_read(dev, GSC_SC_CTRL1, regs, 1);
 424         if (ret)
 425                 goto err;
 426         regs[0] |= BIT(GSC_SC_CTRL1_SLEEP_ADD);
 427         ret = gsc_i2c_write(dev, GSC_SC_CTRL1, regs, 1);
 428         if (ret)
 429                 goto err;
 430         regs[0] &= ~BIT(GSC_SC_CTRL1_SLEEP_ADD);
 431         regs[0] |= BIT(GSC_SC_CTRL1_SLEEP_EN) | BIT(GSC_SC_CTRL1_SLEEP_ACTIVATE);
 432         ret = gsc_i2c_write(dev, GSC_SC_CTRL1, regs, 1);
 433         if (ret)
 434                 goto err;
 435
 436         return 0;
 437
 438 err:
 439         printf("i2c error: %d\n", ret);
 440         return ret;
 441 }
 442
 443 static int gsc_wd_disable(struct udevice *dev)
 444 {
 445         int ret;
 446         u8 reg;
 447
 448         ret = gsc_i2c_read(dev, GSC_SC_CTRL1, &reg, 1);
 449         if (ret)
 450                 goto err;
 451         reg |= BIT(GSC_SC_CTRL1_WDDIS);
 452         reg &= ~BIT(GSC_SC_CTRL1_BOOT_CHK);
 453         ret = gsc_i2c_write(dev, GSC_SC_CTRL1, &reg, 1);
 454         if (ret)
 455                 goto err;
 456         puts("GSC     : boot watchdog disabled\n");
 457
 458         return 0;
 459
 460 err:
 461         puts("i2c error");
 462         return ret;
 463 }
 464
 465 static int gsc_thermal(struct udevice *dev, const char *cmd, const char *val)
 466 {
 467         struct gsc_priv *priv = dev_get_priv(dev);
 468         int ret, tmax;
 469         bool enabled;
 470         u8 reg;
 471
 472         if (priv->gscver < 3 || priv->fwver < 53)
 473                 return -EINVAL;
 474         ret = gsc_thermal_get_info(dev, &reg, &tmax, &enabled);
 475         if (ret)
 476                 return ret;
 477         if (cmd && !strcmp(cmd, "enable")) {
 478                 if (val && *val) {
 479                         tmax = clamp((int)simple_strtoul(val, NULL, 0), 72, 122);
 480                         reg &= ~0xf8;
 481                         reg |= ((tmax - 70) / 2) << 3;
 482                 }
 483                 reg |= BIT(0);
 484                 gsc_i2c_write(dev, GSC_SC_THERM_PROTECT, &reg, 1);
 485         } else if (cmd && !strcmp(cmd, "disable")) {
 486                 reg &= ~BIT(0);
 487                 gsc_i2c_write(dev, GSC_SC_THERM_PROTECT, &reg, 1);
 488         } else if (cmd) {
 489                 return -EINVAL;
 490         }
 491
 492         /* show status */
 493         gsc_thermal_info(dev);
 494         puts("\n");
 495
 496         return 0;
 497 }
 498
 499 /* override in board files to display additional board EEPROM info */
 500 __weak void board_gsc_info(void)
 501 {
 502 }
 503
 504 static void gsc_info(struct udevice *dev)
 505 {
 506         gsc_banner(dev);
 507         board_gsc_info();
 508 }
 509
 510 static int do_gsc(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
 511 {
 512         struct udevice *dev;
 513         int ret;
 514
 515         /* get/probe driver */
 516         ret = uclass_get_device_by_driver(UCLASS_MISC, DM_DRIVER_GET(gsc), &dev);
 517         if (ret)
 518                 return CMD_RET_USAGE;
 519         if (argc < 2) {
 520                 gsc_info(dev);
 521                 return CMD_RET_SUCCESS;
 522         } else if (strcasecmp(argv[1], "sleep") == 0) {
 523                 if (argc < 3)
 524                         return CMD_RET_USAGE;
 525                 if (!gsc_sleep(dev, dectoul(argv[2], NULL)))
 526                         return CMD_RET_SUCCESS;
 527         } else if (strcasecmp(argv[1], "hwmon") == 0) {
 528                 if (!gsc_hwmon(dev))
 529                         return CMD_RET_SUCCESS;
 530         } else if (strcasecmp(argv[1], "wd-disable") == 0) {
 531                 if (!gsc_wd_disable(dev))
 532                         return CMD_RET_SUCCESS;
 533         } else if (strcasecmp(argv[1], "thermal") == 0) {
 534                 const char *cmd, *val;
 535
 536                 cmd = cmd_arg2(argc, argv);
 537                 val = cmd_arg3(argc, argv);
 538                 if (!gsc_thermal(dev, cmd, val))
 539                         return CMD_RET_SUCCESS;
 540         }
 541
 542         return CMD_RET_USAGE;
 543 }
 544
 545 U_BOOT_CMD(gsc, 4, 1, do_gsc, "Gateworks System Controller",
 546            "[sleep <secs>]|[hwmon]|[wd-disable][thermal [disable|enable [temp]]]\n");
 547
 548 /* disable boot watchdog - useful for an SPL that wants to use falcon mode */
 549 int gsc_boot_wd_disable(void)
 550 {
 551         struct udevice *dev;
 552         int ret;
 553
 554         /* get/probe driver */
 555         ret = uclass_get_device_by_driver(UCLASS_MISC, DM_DRIVER_GET(gsc), &dev);
 556         if (!ret)
 557                 ret = gsc_wd_disable(dev);
 558
 559         return ret;
 560 }
 561
 562 # else
 563
 564 /*
 565  * GSCv2 will fail to ACK an I2C transaction if it is busy, which can occur
 566  * during its 1HZ timer tick while reading ADC's. When this does occur,
 567  * it will never be busy longer than 2 back-to-back transfers so retry 3 times.
 568  */
 569 static int gsc_i2c_read(uint chip, uint addr, u8 *buf, int len)
 570 {
 571         int retry = 3;
 572         int n = 0;
 573         int ret;
 574
 575         while (n++ < retry) {
 576                 ret = i2c_read(chip, addr, 1, buf, len);
 577                 if (!ret)
 578                         break;
 579                 if (ret != -EREMOTEIO)
 580                         break;
 581 printf("%s 0x%02x retry %d\n", __func__, addr, n);
 582                 mdelay(10);
 583         }
 584         return ret;
 585 }
 586
 587 static int gsc_i2c_write(uint chip, uint addr, u8 *buf, int len)
 588 {
 589         int retry = 3;
 590         int n = 0;
 591         int ret;
 592
 593         while (n++ < retry) {
 594                 ret = i2c_write(chip, addr, 1, buf, len);
 595                 if (!ret)
 596                         break;
 597                 if (ret != -EREMOTEIO)
 598                         break;
 599 printf("%s 0x%02x retry %d\n", __func__, addr, n);
 600                 mdelay(10);
 601         }
 602         return ret;
 603 }
 604
 605 /* disable boot watchdog - useful for an SPL that wants to use falcon mode */
 606 int gsc_boot_wd_disable(void)
 607 {
 608         u8 buf[32];
 609         int ret;
 610
 611         i2c_set_bus_num(GSC_BUSNO);
 612         ret = gsc_i2c_read(GSC_SC_ADDR, 0, buf, sizeof(buf));
 613         if (!ret) {
 614                 buf[GSC_SC_CTRL1] |= BIT(GSC_SC_CTRL1_WDDIS);
 615                 ret = gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, &buf[GSC_SC_CTRL1], 1);
 616                 printf("GSCv%d: v%d 0x%04x ",
 617                        memcmp(buf, buf + 16, 16) ? 3 : 2,
 618                        buf[GSC_SC_FWVER],
 619                        buf[GSC_SC_FWCRC] | buf[GSC_SC_FWCRC + 1] << 8);
 620                 if (buf[GSC_SC_STATUS] & BIT(GSC_SC_IRQ_WATCHDOG)) {
 621                         puts("RST:WDT ");
 622                         buf[GSC_SC_STATUS] &= ~BIT(GSC_SC_IRQ_WATCHDOG);
 623                         gsc_i2c_write(GSC_SC_ADDR, GSC_SC_STATUS, &buf[GSC_SC_STATUS], 1);
 624                 } else {
 625                         puts("RST:VIN ");
 626                 }
 627                 puts("WDT:disabled\n");
 628         }
 629
 630         return ret;
 631 }
 632
 633 #endif