itesio_isa.c revision 1.19
1 /* $NetBSD: itesio_isa.c,v 1.19 2010/07/17 21:36:26 pgoyette Exp $ */ 2 /* Derived from $OpenBSD: it.c,v 1.19 2006/04/10 00:57:54 deraadt Exp $ */ 3 4 /* 5 * Copyright (c) 2006-2007 Juan Romero Pardines <xtraeme (at) netbsd.org> 6 * Copyright (c) 2003 Julien Bordet <zejames (at) greyhats.org> 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITD TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITD TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 /* 31 * Driver for the iTE IT87xxF Super I/O. Currently supporting 32 * the Environmental Controller to monitor the sensors and the 33 * Watchdog Timer. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: itesio_isa.c,v 1.19 2010/07/17 21:36:26 pgoyette Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/kernel.h> 41 #include <sys/device.h> 42 43 #include <sys/bus.h> 44 45 #include <dev/isa/isareg.h> 46 #include <dev/isa/isavar.h> 47 48 #include <dev/sysmon/sysmonvar.h> 49 50 #include <dev/isa/itesio_isavar.h> 51 52 #define IT_VOLTSTART_IDX 3 /* voltage start index */ 53 #define IT_FANSTART_IDX 12 /* fan start index */ 54 55 #if defined(ITESIO_DEBUG) 56 #define DPRINTF(x) do { printf x; } while (0) 57 #else 58 #define DPRINTF(x) 59 #endif 60 61 /* 62 * IT87-compatible chips can typically measure voltages up to 4.096 V. 63 * To measure higher voltages the input is attenuated with (external) 64 * resistors. Negative voltages are measured using a reference 65 * voltage. So we have to convert the sensor values back to real 66 * voltages by applying the appropriate resistor factor. 67 */ 68 #define RFACT_NONE 10000 69 #define RFACT(x, y) (RFACT_NONE * ((x) + (y)) / (y)) 70 71 /* autoconf(9) functions */ 72 static int itesio_isa_match(device_t, cfdata_t, void *); 73 static void itesio_isa_attach(device_t, device_t, void *); 74 static int itesio_isa_detach(device_t, int); 75 76 CFATTACH_DECL_NEW(itesio, sizeof(struct itesio_softc), 77 itesio_isa_match, itesio_isa_attach, itesio_isa_detach, NULL); 78 79 /* driver functions */ 80 static uint8_t itesio_ecreadreg(struct itesio_softc *, int); 81 static void itesio_ecwritereg(struct itesio_softc *, int, int); 82 static uint8_t itesio_readreg(bus_space_tag_t, bus_space_handle_t, int); 83 static void itesio_writereg(bus_space_tag_t, bus_space_handle_t, int, int); 84 static void itesio_enter(bus_space_tag_t, bus_space_handle_t); 85 static void itesio_exit(bus_space_tag_t, bus_space_handle_t); 86 87 /* sysmon_envsys(9) glue */ 88 static void itesio_setup_sensors(struct itesio_softc *); 89 static void itesio_refresh_temp(struct itesio_softc *, envsys_data_t *); 90 static void itesio_refresh_volts(struct itesio_softc *, envsys_data_t *); 91 static void itesio_refresh_fans(struct itesio_softc *, envsys_data_t *); 92 static void itesio_refresh(struct sysmon_envsys *, envsys_data_t *); 93 94 /* sysmon_wdog glue */ 95 static bool itesio_wdt_suspend(device_t, const pmf_qual_t *); 96 static int itesio_wdt_setmode(struct sysmon_wdog *); 97 static int itesio_wdt_tickle(struct sysmon_wdog *); 98 99 /* rfact values for voltage sensors */ 100 static const int itesio_vrfact[] = { 101 RFACT_NONE, /* VCORE_A */ 102 RFACT_NONE, /* VCORE_B */ 103 RFACT_NONE, /* +3.3V */ 104 RFACT(68, 100), /* +5V */ 105 RFACT(30, 10), /* +12V */ 106 RFACT(21, 10), /* -5V */ 107 RFACT(83, 20), /* -12V */ 108 RFACT(68, 100), /* STANDBY */ 109 RFACT_NONE /* VBAT */ 110 }; 111 112 static int 113 itesio_isa_match(device_t parent, cfdata_t match, void *aux) 114 { 115 struct isa_attach_args *ia = aux; 116 bus_space_handle_t ioh; 117 uint16_t cr; 118 119 /* Must supply an address */ 120 if (ia->ia_nio < 1) 121 return 0; 122 123 if (ISA_DIRECT_CONFIG(ia)) 124 return 0; 125 126 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 127 return 0; 128 129 if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 2, 0, &ioh)) 130 return 0; 131 132 itesio_enter(ia->ia_iot, ioh); 133 cr = (itesio_readreg(ia->ia_iot, ioh, ITESIO_CHIPID1) << 8); 134 cr |= itesio_readreg(ia->ia_iot, ioh, ITESIO_CHIPID2); 135 itesio_exit(ia->ia_iot, ioh); 136 bus_space_unmap(ia->ia_iot, ioh, 2); 137 138 switch (cr) { 139 case ITESIO_ID8705: 140 case ITESIO_ID8712: 141 case ITESIO_ID8716: 142 case ITESIO_ID8718: 143 case ITESIO_ID8726: 144 ia->ia_nio = 1; 145 ia->ia_io[0].ir_size = 2; 146 ia->ia_niomem = 0; 147 ia->ia_nirq = 0; 148 ia->ia_ndrq = 0; 149 return 1; 150 default: 151 return 0; 152 } 153 } 154 155 static void 156 itesio_isa_attach(device_t parent, device_t self, void *aux) 157 { 158 struct itesio_softc *sc = device_private(self); 159 struct isa_attach_args *ia = aux; 160 int i; 161 uint8_t cr; 162 163 sc->sc_iot = ia->ia_iot; 164 165 if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 2, 0, 166 &sc->sc_pnp_ioh)) { 167 aprint_error(": can't map pnp i/o space\n"); 168 return; 169 } 170 171 aprint_naive("\n"); 172 173 /* 174 * Enter to the Super I/O MB PNP mode. 175 */ 176 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 177 /* 178 * Get info from the Super I/O Global Configuration Registers: 179 * Chip IDs and Device Revision. 180 */ 181 sc->sc_chipid = (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 182 ITESIO_CHIPID1) << 8); 183 sc->sc_chipid |= itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 184 ITESIO_CHIPID2); 185 sc->sc_devrev = (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 186 ITESIO_DEVREV) & 0x0f); 187 /* 188 * Select the EC LDN to get the Base Address. 189 */ 190 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 191 ITESIO_EC_LDN); 192 sc->sc_hwmon_baseaddr = 193 (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_EC_MSB) << 8); 194 sc->sc_hwmon_baseaddr |= itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 195 ITESIO_EC_LSB); 196 /* 197 * We are done, exit MB PNP mode. 198 */ 199 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 200 201 aprint_normal(": iTE IT%4xF Super I/O (rev %d)\n", 202 sc->sc_chipid, sc->sc_devrev); 203 aprint_normal_dev(self, "Hardware Monitor registers at 0x%x\n", 204 sc->sc_hwmon_baseaddr); 205 206 if (bus_space_map(sc->sc_iot, sc->sc_hwmon_baseaddr, 8, 0, 207 &sc->sc_ec_ioh)) { 208 aprint_error_dev(self, "cannot map hwmon i/o space\n"); 209 goto out2; 210 } 211 212 sc->sc_hwmon_mapped = true; 213 214 /* Activate monitoring */ 215 cr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 216 SET(cr, 0x01); 217 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, cr); 218 219 #ifdef notyet 220 /* Enable beep alarms */ 221 cr = itesio_ecreadreg(sc, ITESIO_EC_BEEPEER); 222 SET(cr, 0x02); /* Voltage exceeds limit */ 223 SET(cr, 0x04); /* Temperature exceeds limit */ 224 itesio_ecwritereg(sc, ITESIO_EC_BEEPEER, cr); 225 #endif 226 227 /* 228 * Initialize and attach sensors. 229 */ 230 itesio_setup_sensors(sc); 231 sc->sc_sme = sysmon_envsys_create(); 232 for (i = 0; i < IT_NUM_SENSORS; i++) { 233 if (sysmon_envsys_sensor_attach(sc->sc_sme, 234 &sc->sc_sensor[i])) { 235 sysmon_envsys_destroy(sc->sc_sme); 236 goto out; 237 } 238 } 239 /* 240 * Hook into the system monitor. 241 */ 242 sc->sc_sme->sme_name = device_xname(self); 243 sc->sc_sme->sme_cookie = sc; 244 sc->sc_sme->sme_refresh = itesio_refresh; 245 246 if ((i = sysmon_envsys_register(sc->sc_sme))) { 247 aprint_error_dev(self, 248 "unable to register with sysmon (%d)\n", i); 249 sysmon_envsys_destroy(sc->sc_sme); 250 goto out; 251 } 252 sc->sc_hwmon_enabled = true; 253 254 /* The IT8705 doesn't support the WDT */ 255 if (sc->sc_chipid == ITESIO_ID8705) 256 goto out2; 257 258 /* 259 * Initialize the watchdog timer. 260 */ 261 sc->sc_smw.smw_name = device_xname(self); 262 sc->sc_smw.smw_cookie = sc; 263 sc->sc_smw.smw_setmode = itesio_wdt_setmode; 264 sc->sc_smw.smw_tickle = itesio_wdt_tickle; 265 sc->sc_smw.smw_period = 60; 266 267 if (sysmon_wdog_register(&sc->sc_smw)) { 268 aprint_error_dev(self, "unable to register watchdog timer\n"); 269 goto out2; 270 } 271 sc->sc_wdt_enabled = true; 272 aprint_normal_dev(self, "Watchdog Timer present\n"); 273 274 if (!pmf_device_register(self, itesio_wdt_suspend, NULL)) 275 aprint_error_dev(self, "couldn't establish power handler\n"); 276 277 return; 278 279 out: 280 bus_space_unmap(sc->sc_iot, sc->sc_ec_ioh, 8); 281 out2: 282 bus_space_unmap(sc->sc_iot, sc->sc_pnp_ioh, 2); 283 284 if (!pmf_device_register(self, NULL, NULL)) 285 aprint_error_dev(self, "couldn't establish power handler\n"); 286 287 } 288 289 static int 290 itesio_isa_detach(device_t self, int flags) 291 { 292 struct itesio_softc *sc = device_private(self); 293 294 if (sc->sc_hwmon_enabled) 295 sysmon_envsys_unregister(sc->sc_sme); 296 if (sc->sc_hwmon_mapped) 297 bus_space_unmap(sc->sc_iot, sc->sc_ec_ioh, 8); 298 if (sc->sc_wdt_enabled) { 299 sysmon_wdog_unregister(&sc->sc_smw); 300 bus_space_unmap(sc->sc_iot, sc->sc_pnp_ioh, 2); 301 } 302 303 return 0; 304 } 305 306 static bool 307 itesio_wdt_suspend(device_t dev, const pmf_qual_t *qual) 308 { 309 struct itesio_softc *sc = device_private(dev); 310 311 /* Don't allow suspend if watchdog is armed */ 312 if ((sc->sc_smw.smw_mode & WDOG_MODE_MASK) != WDOG_MODE_DISARMED) 313 return false; 314 return true; 315 } 316 317 /* 318 * Functions to read/write to the Environmental Controller. 319 */ 320 static uint8_t 321 itesio_ecreadreg(struct itesio_softc *sc, int reg) 322 { 323 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 324 return bus_space_read_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_DATA); 325 } 326 327 static void 328 itesio_ecwritereg(struct itesio_softc *sc, int reg, int val) 329 { 330 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 331 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_DATA, val); 332 } 333 334 /* 335 * Functions to enter/exit/read/write to the Super I/O. 336 */ 337 static uint8_t 338 itesio_readreg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg) 339 { 340 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 341 return bus_space_read_1(iot, ioh, ITESIO_DATA); 342 } 343 344 static void 345 itesio_writereg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, int val) 346 { 347 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 348 bus_space_write_1(iot, ioh, ITESIO_DATA, val); 349 } 350 351 static void 352 itesio_enter(bus_space_tag_t iot, bus_space_handle_t ioh) 353 { 354 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x87); 355 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x01); 356 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 357 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 358 } 359 360 static void 361 itesio_exit(bus_space_tag_t iot, bus_space_handle_t ioh) 362 { 363 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x02); 364 bus_space_write_1(iot, ioh, ITESIO_DATA, 0x02); 365 } 366 367 368 #define COPYDESCR(x, y) \ 369 do { \ 370 strlcpy((x), (y), sizeof(x)); \ 371 } while (0) 372 /* 373 * sysmon_envsys(9) glue. 374 */ 375 static void 376 itesio_setup_sensors(struct itesio_softc *sc) 377 { 378 int i; 379 380 /* temperatures */ 381 for (i = 0; i < IT_VOLTSTART_IDX; i++) 382 sc->sc_sensor[i].units = ENVSYS_STEMP; 383 384 COPYDESCR(sc->sc_sensor[0].desc, "CPU Temp"); 385 COPYDESCR(sc->sc_sensor[1].desc, "System Temp"); 386 COPYDESCR(sc->sc_sensor[2].desc, "Aux Temp"); 387 388 /* voltages */ 389 for (i = IT_VOLTSTART_IDX; i < IT_FANSTART_IDX; i++) { 390 sc->sc_sensor[i].units = ENVSYS_SVOLTS_DC; 391 sc->sc_sensor[i].flags = ENVSYS_FCHANGERFACT; 392 } 393 394 COPYDESCR(sc->sc_sensor[3].desc, "VCORE_A"); 395 COPYDESCR(sc->sc_sensor[4].desc, "VCORE_B"); 396 COPYDESCR(sc->sc_sensor[5].desc, "+3.3V"); 397 COPYDESCR(sc->sc_sensor[6].desc, "+5V"); 398 COPYDESCR(sc->sc_sensor[7].desc, "+12V"); 399 COPYDESCR(sc->sc_sensor[8].desc, "-5V"); 400 COPYDESCR(sc->sc_sensor[9].desc, "-12V"); 401 COPYDESCR(sc->sc_sensor[10].desc, "STANDBY"); 402 COPYDESCR(sc->sc_sensor[11].desc, "VBAT"); 403 404 /* fans */ 405 for (i = IT_FANSTART_IDX; i < IT_NUM_SENSORS; i++) 406 sc->sc_sensor[i].units = ENVSYS_SFANRPM; 407 408 COPYDESCR(sc->sc_sensor[12].desc, "CPU Fan"); 409 COPYDESCR(sc->sc_sensor[13].desc, "System Fan"); 410 COPYDESCR(sc->sc_sensor[14].desc, "Aux Fan"); 411 } 412 #undef COPYDESCR 413 414 static void 415 itesio_refresh_temp(struct itesio_softc *sc, envsys_data_t *edata) 416 { 417 int sdata; 418 419 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORTEMPBASE + edata->sensor); 420 /* sensor is not connected or reporting invalid data */ 421 if (sdata == 0 || sdata >= 0xfa) { 422 edata->state = ENVSYS_SINVALID; 423 return; 424 } 425 426 DPRINTF(("%s: sdata[temp%d] 0x%x\n", __func__, edata->sensor, sdata)); 427 /* Convert temperature to uK */ 428 edata->value_cur = sdata * 1000000 + 273150000; 429 edata->state = ENVSYS_SVALID; 430 } 431 432 static void 433 itesio_refresh_volts(struct itesio_softc *sc, envsys_data_t *edata) 434 { 435 uint8_t vbatcr = 0; 436 int i, sdata; 437 438 i = edata->sensor - IT_VOLTSTART_IDX; 439 440 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORVOLTBASE + i); 441 /* not connected */ 442 if (sdata == 0 || sdata == 0xff) { 443 edata->state = ENVSYS_SINVALID; 444 return; 445 } 446 447 /* 448 * update VBAT voltage reading every time we read it, to get 449 * latest value. 450 */ 451 if (i == 8) { 452 vbatcr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 453 SET(vbatcr, ITESIO_EC_UPDATEVBAT); 454 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, vbatcr); 455 } 456 457 DPRINTF(("%s: sdata[volt%d] 0x%x\n", __func__, i, sdata)); 458 459 /* voltage returned as (mV << 4) */ 460 edata->value_cur = (sdata << 4); 461 /* negative values */ 462 if (i == 5 || i == 6) 463 edata->value_cur -= ITESIO_EC_VREF; 464 /* rfact is (factor * 10^4) */ 465 edata->value_cur *= itesio_vrfact[i]; 466 if (edata->rfact) 467 edata->value_cur += edata->rfact; 468 /* division by 10 gets us back to uVDC */ 469 edata->value_cur /= 10; 470 if (i == 5 || i == 6) 471 edata->value_cur += ITESIO_EC_VREF * 1000; 472 473 edata->state = ENVSYS_SVALID; 474 } 475 476 static void 477 itesio_refresh_fans(struct itesio_softc *sc, envsys_data_t *edata) 478 { 479 uint8_t mode = 0; 480 uint16_t sdata = 0; 481 int i, divisor, odivisor, ndivisor; 482 483 i = edata->sensor - IT_FANSTART_IDX; 484 divisor = odivisor = ndivisor = 0; 485 486 if (sc->sc_chipid == ITESIO_ID8705 || sc->sc_chipid == ITESIO_ID8712) { 487 /* 488 * Use the Fan Tachometer Divisor Register for 489 * IT8705F and IT8712F. 490 */ 491 divisor = odivisor = ndivisor = 492 itesio_ecreadreg(sc, ITESIO_EC_FAN_TDR); 493 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 494 if (sdata == 0xff) { 495 edata->state = ENVSYS_SINVALID; 496 if (i == 2) 497 ndivisor |= 0x40; 498 else { 499 ndivisor &= ~(7 << (i * 3)); 500 ndivisor |= ((divisor + 1) & 7) << (i * 3); 501 } 502 } else { 503 if (i == 2) 504 divisor = divisor & 1 ? 3 : 1; 505 506 if ((sdata << (divisor & 7)) == 0) 507 edata->state = ENVSYS_SINVALID; 508 else { 509 edata->value_cur = 510 1350000 / (sdata << (divisor & 7)); 511 edata->state = ENVSYS_SVALID; 512 } 513 } 514 DPRINTF(("%s: 8bit sdata[fan%d] 0x%x div: 0x%x\n", __func__, 515 i, sdata, divisor)); 516 if (ndivisor != odivisor) 517 itesio_ecwritereg(sc, ITESIO_EC_FAN_TDR, ndivisor); 518 } else { 519 mode = itesio_ecreadreg(sc, ITESIO_EC_FAN16_CER); 520 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 521 if (mode & (1 << i)) 522 sdata += (itesio_ecreadreg(sc, 523 ITESIO_EC_SENSORFANEXTBASE + i) << 8); 524 edata->state = ENVSYS_SVALID; 525 if (sdata == 0 || 526 sdata == ((mode & (1 << i)) ? 0xffff : 0xff)) 527 edata->state = ENVSYS_SINVALID; 528 else { 529 edata->value_cur = 1350000 / 2 / sdata; 530 edata->state = ENVSYS_SVALID; 531 } 532 DPRINTF(("%s: 16bit sdata[fan%d] 0x%x\n", __func__, i, sdata)); 533 } 534 } 535 536 static void 537 itesio_refresh(struct sysmon_envsys *sme, struct envsys_data *edata) 538 { 539 struct itesio_softc *sc = sme->sme_cookie; 540 541 if (edata->sensor < IT_VOLTSTART_IDX) 542 itesio_refresh_temp(sc, edata); 543 else if (edata->sensor >= IT_VOLTSTART_IDX && 544 edata->sensor < IT_FANSTART_IDX) 545 itesio_refresh_volts(sc, edata); 546 else 547 itesio_refresh_fans(sc, edata); 548 } 549 550 static int 551 itesio_wdt_setmode(struct sysmon_wdog *smw) 552 { 553 struct itesio_softc *sc = smw->smw_cookie; 554 int period = smw->smw_period; 555 556 /* Enter MB PNP mode and select the WDT LDN */ 557 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 558 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 559 ITESIO_WDT_LDN); 560 561 if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 562 /* Disable the watchdog */ 563 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CTL, 0); 564 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CNF, 0); 565 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 0); 566 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 0); 567 } else { 568 /* Enable the watchdog */ 569 if (period > ITESIO_WDT_MAXTIMO || period < 1) 570 period = smw->smw_period = ITESIO_WDT_MAXTIMO; 571 572 period *= 2; 573 574 /* set the timeout and start the watchdog */ 575 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 576 period >> 8); 577 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 578 period & 0xff); 579 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CNF, 580 ITESIO_WDT_CNF_SECS | ITESIO_WDT_CNF_KRST | 581 ITESIO_WDT_CNF_PWROK); 582 } 583 /* we are done, exit MB PNP mode */ 584 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 585 586 return 0; 587 } 588 589 static int 590 itesio_wdt_tickle(struct sysmon_wdog *smw) 591 { 592 struct itesio_softc *sc = smw->smw_cookie; 593 int period = smw->smw_period * 2; 594 595 /* refresh timeout value and exit */ 596 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 597 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 598 ITESIO_WDT_LDN); 599 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 600 period >> 8); 601 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 602 period & 0xff); 603 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 604 605 return 0; 606 } 607
Indexes created Tue Sep 30 20:09:53 GMT 2025