itesio_isa.c revision 1.22
1 /* $NetBSD: itesio_isa.c,v 1.22 2011/06/20 18:12:54 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 1.22 2011/06/20 18:12:54 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_ID8721: 144 case ITESIO_ID8726: 145 ia->ia_nio = 1; 146 ia->ia_io[0].ir_size = 2; 147 ia->ia_niomem = 0; 148 ia->ia_nirq = 0; 149 ia->ia_ndrq = 0; 150 return 1; 151 default: 152 return 0; 153 } 154 } 155 156 static void 157 itesio_isa_attach(device_t parent, device_t self, void *aux) 158 { 159 struct itesio_softc *sc = device_private(self); 160 struct isa_attach_args *ia = aux; 161 int i; 162 uint8_t cr; 163 164 sc->sc_iot = ia->ia_iot; 165 166 if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 2, 0, 167 &sc->sc_pnp_ioh)) { 168 aprint_error(": can't map pnp i/o space\n"); 169 return; 170 } 171 172 aprint_naive("\n"); 173 174 /* 175 * Enter to the Super I/O MB PNP mode. 176 */ 177 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 178 /* 179 * Get info from the Super I/O Global Configuration Registers: 180 * Chip IDs and Device Revision. 181 */ 182 sc->sc_chipid = (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 183 ITESIO_CHIPID1) << 8); 184 sc->sc_chipid |= itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 185 ITESIO_CHIPID2); 186 sc->sc_devrev = (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 187 ITESIO_DEVREV) & 0x0f); 188 /* 189 * Select the EC LDN to get the Base Address. 190 */ 191 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 192 ITESIO_EC_LDN); 193 sc->sc_hwmon_baseaddr = 194 (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_EC_MSB) << 8); 195 sc->sc_hwmon_baseaddr |= itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 196 ITESIO_EC_LSB); 197 /* 198 * We are done, exit MB PNP mode. 199 */ 200 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 201 202 aprint_normal(": iTE IT%4xF Super I/O (rev %d)\n", 203 sc->sc_chipid, sc->sc_devrev); 204 aprint_normal_dev(self, "Hardware Monitor registers at 0x%x\n", 205 sc->sc_hwmon_baseaddr); 206 207 if (bus_space_map(sc->sc_iot, sc->sc_hwmon_baseaddr, 8, 0, 208 &sc->sc_ec_ioh)) { 209 aprint_error_dev(self, "cannot map hwmon i/o space\n"); 210 goto out2; 211 } 212 213 sc->sc_hwmon_mapped = true; 214 215 /* Activate monitoring */ 216 cr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 217 SET(cr, 0x01); 218 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, cr); 219 220 #ifdef notyet 221 /* Enable beep alarms */ 222 cr = itesio_ecreadreg(sc, ITESIO_EC_BEEPEER); 223 SET(cr, 0x02); /* Voltage exceeds limit */ 224 SET(cr, 0x04); /* Temperature exceeds limit */ 225 itesio_ecwritereg(sc, ITESIO_EC_BEEPEER, cr); 226 #endif 227 228 /* 229 * Initialize and attach sensors. 230 */ 231 itesio_setup_sensors(sc); 232 sc->sc_sme = sysmon_envsys_create(); 233 for (i = 0; i < IT_NUM_SENSORS; i++) { 234 if (sysmon_envsys_sensor_attach(sc->sc_sme, 235 &sc->sc_sensor[i])) { 236 sysmon_envsys_destroy(sc->sc_sme); 237 goto out; 238 } 239 } 240 /* 241 * Hook into the system monitor. 242 */ 243 sc->sc_sme->sme_name = device_xname(self); 244 sc->sc_sme->sme_cookie = sc; 245 sc->sc_sme->sme_refresh = itesio_refresh; 246 247 if ((i = sysmon_envsys_register(sc->sc_sme))) { 248 aprint_error_dev(self, 249 "unable to register with sysmon (%d)\n", i); 250 sysmon_envsys_destroy(sc->sc_sme); 251 goto out; 252 } 253 sc->sc_hwmon_enabled = true; 254 255 if (!pmf_device_register(self, NULL, NULL)) 256 aprint_error_dev(self, "couldn't establish power handler\n"); 257 258 /* The IT8705 doesn't support the WDT */ 259 if (sc->sc_chipid == ITESIO_ID8705) 260 goto out2; 261 262 /* 263 * Initialize the watchdog timer. 264 */ 265 sc->sc_smw.smw_name = device_xname(self); 266 sc->sc_smw.smw_cookie = sc; 267 sc->sc_smw.smw_setmode = itesio_wdt_setmode; 268 sc->sc_smw.smw_tickle = itesio_wdt_tickle; 269 sc->sc_smw.smw_period = 60; 270 271 if (sysmon_wdog_register(&sc->sc_smw)) { 272 aprint_error_dev(self, "unable to register watchdog timer\n"); 273 goto out2; 274 } 275 sc->sc_wdt_enabled = true; 276 aprint_normal_dev(self, "Watchdog Timer present\n"); 277 278 pmf_device_deregister(self); 279 if (!pmf_device_register(self, itesio_wdt_suspend, NULL)) 280 aprint_error_dev(self, "couldn't establish power handler\n"); 281 282 return; 283 284 out: 285 bus_space_unmap(sc->sc_iot, sc->sc_ec_ioh, 8); 286 out2: 287 bus_space_unmap(sc->sc_iot, sc->sc_pnp_ioh, 2); 288 } 289 290 static int 291 itesio_isa_detach(device_t self, int flags) 292 { 293 struct itesio_softc *sc = device_private(self); 294 295 if (sc->sc_hwmon_enabled) 296 sysmon_envsys_unregister(sc->sc_sme); 297 if (sc->sc_hwmon_mapped) 298 bus_space_unmap(sc->sc_iot, sc->sc_ec_ioh, 8); 299 if (sc->sc_wdt_enabled) { 300 sysmon_wdog_unregister(&sc->sc_smw); 301 bus_space_unmap(sc->sc_iot, sc->sc_pnp_ioh, 2); 302 } 303 304 return 0; 305 } 306 307 static bool 308 itesio_wdt_suspend(device_t dev, const pmf_qual_t *qual) 309 { 310 struct itesio_softc *sc = device_private(dev); 311 312 /* Don't allow suspend if watchdog is armed */ 313 if ((sc->sc_smw.smw_mode & WDOG_MODE_MASK) != WDOG_MODE_DISARMED) 314 return false; 315 return true; 316 } 317 318 /* 319 * Functions to read/write to the Environmental Controller. 320 */ 321 static uint8_t 322 itesio_ecreadreg(struct itesio_softc *sc, int reg) 323 { 324 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 325 return bus_space_read_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_DATA); 326 } 327 328 static void 329 itesio_ecwritereg(struct itesio_softc *sc, int reg, int val) 330 { 331 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 332 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_DATA, val); 333 } 334 335 /* 336 * Functions to enter/exit/read/write to the Super I/O. 337 */ 338 static uint8_t 339 itesio_readreg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg) 340 { 341 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 342 return bus_space_read_1(iot, ioh, ITESIO_DATA); 343 } 344 345 static void 346 itesio_writereg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, int val) 347 { 348 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 349 bus_space_write_1(iot, ioh, ITESIO_DATA, val); 350 } 351 352 static void 353 itesio_enter(bus_space_tag_t iot, bus_space_handle_t ioh) 354 { 355 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x87); 356 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x01); 357 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 358 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 359 } 360 361 static void 362 itesio_exit(bus_space_tag_t iot, bus_space_handle_t ioh) 363 { 364 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x02); 365 bus_space_write_1(iot, ioh, ITESIO_DATA, 0x02); 366 } 367 368 369 #define COPYDESCR(x, y) \ 370 do { \ 371 strlcpy((x), (y), sizeof(x)); \ 372 } while (0) 373 /* 374 * sysmon_envsys(9) glue. 375 */ 376 static void 377 itesio_setup_sensors(struct itesio_softc *sc) 378 { 379 int i; 380 381 /* temperatures */ 382 for (i = 0; i < IT_VOLTSTART_IDX; i++) 383 sc->sc_sensor[i].units = ENVSYS_STEMP; 384 385 COPYDESCR(sc->sc_sensor[0].desc, "CPU Temp"); 386 COPYDESCR(sc->sc_sensor[1].desc, "System Temp"); 387 COPYDESCR(sc->sc_sensor[2].desc, "Aux Temp"); 388 389 /* voltages */ 390 for (i = IT_VOLTSTART_IDX; i < IT_FANSTART_IDX; i++) { 391 sc->sc_sensor[i].units = ENVSYS_SVOLTS_DC; 392 sc->sc_sensor[i].flags = ENVSYS_FCHANGERFACT; 393 } 394 395 COPYDESCR(sc->sc_sensor[3].desc, "VCORE_A"); 396 COPYDESCR(sc->sc_sensor[4].desc, "VCORE_B"); 397 COPYDESCR(sc->sc_sensor[5].desc, "+3.3V"); 398 COPYDESCR(sc->sc_sensor[6].desc, "+5V"); 399 COPYDESCR(sc->sc_sensor[7].desc, "+12V"); 400 COPYDESCR(sc->sc_sensor[8].desc, "-5V"); 401 COPYDESCR(sc->sc_sensor[9].desc, "-12V"); 402 COPYDESCR(sc->sc_sensor[10].desc, "STANDBY"); 403 COPYDESCR(sc->sc_sensor[11].desc, "VBAT"); 404 405 /* fans */ 406 for (i = IT_FANSTART_IDX; i < IT_NUM_SENSORS; i++) 407 sc->sc_sensor[i].units = ENVSYS_SFANRPM; 408 409 COPYDESCR(sc->sc_sensor[12].desc, "CPU Fan"); 410 COPYDESCR(sc->sc_sensor[13].desc, "System Fan"); 411 COPYDESCR(sc->sc_sensor[14].desc, "Aux Fan"); 412 413 /* all */ 414 for (i = 0; i < IT_NUM_SENSORS; i++) 415 sc->sc_sensor[i].state = ENVSYS_SINVALID; 416 } 417 #undef COPYDESCR 418 419 static void 420 itesio_refresh_temp(struct itesio_softc *sc, envsys_data_t *edata) 421 { 422 int sdata; 423 424 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORTEMPBASE + edata->sensor); 425 /* sensor is not connected or reporting invalid data */ 426 if (sdata == 0 || sdata >= 0xfa) { 427 edata->state = ENVSYS_SINVALID; 428 return; 429 } 430 431 DPRINTF(("%s: sdata[temp%d] 0x%x\n", __func__, edata->sensor, sdata)); 432 /* Convert temperature to uK */ 433 edata->value_cur = sdata * 1000000 + 273150000; 434 edata->state = ENVSYS_SVALID; 435 } 436 437 static void 438 itesio_refresh_volts(struct itesio_softc *sc, envsys_data_t *edata) 439 { 440 uint8_t vbatcr = 0; 441 int i, sdata; 442 443 i = edata->sensor - IT_VOLTSTART_IDX; 444 445 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORVOLTBASE + i); 446 /* not connected */ 447 if (sdata == 0 || sdata == 0xff) { 448 edata->state = ENVSYS_SINVALID; 449 return; 450 } 451 452 /* 453 * update VBAT voltage reading every time we read it, to get 454 * latest value. 455 */ 456 if (i == 8) { 457 vbatcr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 458 SET(vbatcr, ITESIO_EC_UPDATEVBAT); 459 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, vbatcr); 460 } 461 462 DPRINTF(("%s: sdata[volt%d] 0x%x\n", __func__, i, sdata)); 463 464 /* voltage returned as (mV << 4) */ 465 edata->value_cur = (sdata << 4); 466 /* negative values */ 467 if (i == 5 || i == 6) 468 edata->value_cur -= ITESIO_EC_VREF; 469 /* rfact is (factor * 10^4) */ 470 if (edata->rfact) 471 edata->value_cur *= edata->rfact; 472 else 473 edata->value_cur *= itesio_vrfact[i]; 474 /* division by 10 gets us back to uVDC */ 475 edata->value_cur /= 10; 476 if (i == 5 || i == 6) 477 edata->value_cur += ITESIO_EC_VREF * 1000; 478 479 edata->state = ENVSYS_SVALID; 480 } 481 482 static void 483 itesio_refresh_fans(struct itesio_softc *sc, envsys_data_t *edata) 484 { 485 uint8_t mode = 0; 486 uint16_t sdata = 0; 487 int i, divisor, odivisor, ndivisor; 488 489 i = edata->sensor - IT_FANSTART_IDX; 490 divisor = odivisor = ndivisor = 0; 491 492 if (sc->sc_chipid == ITESIO_ID8705 || sc->sc_chipid == ITESIO_ID8712) { 493 /* 494 * Use the Fan Tachometer Divisor Register for 495 * IT8705F and IT8712F. 496 */ 497 divisor = odivisor = ndivisor = 498 itesio_ecreadreg(sc, ITESIO_EC_FAN_TDR); 499 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 500 if (sdata == 0xff) { 501 edata->state = ENVSYS_SINVALID; 502 if (i == 2) 503 ndivisor |= 0x40; 504 else { 505 ndivisor &= ~(7 << (i * 3)); 506 ndivisor |= ((divisor + 1) & 7) << (i * 3); 507 } 508 } else { 509 if (i == 2) 510 divisor = divisor & 1 ? 3 : 1; 511 512 if ((sdata << (divisor & 7)) == 0) 513 edata->state = ENVSYS_SINVALID; 514 else { 515 edata->value_cur = 516 1350000 / (sdata << (divisor & 7)); 517 edata->state = ENVSYS_SVALID; 518 } 519 } 520 DPRINTF(("%s: 8bit sdata[fan%d] 0x%x div: 0x%x\n", __func__, 521 i, sdata, divisor)); 522 if (ndivisor != odivisor) 523 itesio_ecwritereg(sc, ITESIO_EC_FAN_TDR, ndivisor); 524 } else { 525 mode = itesio_ecreadreg(sc, ITESIO_EC_FAN16_CER); 526 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 527 if (mode & (1 << i)) 528 sdata += (itesio_ecreadreg(sc, 529 ITESIO_EC_SENSORFANEXTBASE + i) << 8); 530 edata->state = ENVSYS_SVALID; 531 if (sdata == 0 || 532 sdata == ((mode & (1 << i)) ? 0xffff : 0xff)) 533 edata->state = ENVSYS_SINVALID; 534 else { 535 edata->value_cur = 1350000 / 2 / sdata; 536 edata->state = ENVSYS_SVALID; 537 } 538 DPRINTF(("%s: 16bit sdata[fan%d] 0x%x\n", __func__, i, sdata)); 539 } 540 } 541 542 static void 543 itesio_refresh(struct sysmon_envsys *sme, struct envsys_data *edata) 544 { 545 struct itesio_softc *sc = sme->sme_cookie; 546 547 if (edata->sensor < IT_VOLTSTART_IDX) 548 itesio_refresh_temp(sc, edata); 549 else if (edata->sensor >= IT_VOLTSTART_IDX && 550 edata->sensor < IT_FANSTART_IDX) 551 itesio_refresh_volts(sc, edata); 552 else 553 itesio_refresh_fans(sc, edata); 554 } 555 556 static int 557 itesio_wdt_setmode(struct sysmon_wdog *smw) 558 { 559 struct itesio_softc *sc = smw->smw_cookie; 560 int period = smw->smw_period; 561 562 /* Enter MB PNP mode and select the WDT LDN */ 563 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 564 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 565 ITESIO_WDT_LDN); 566 567 if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 568 /* Disable the watchdog */ 569 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CTL, 0); 570 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CNF, 0); 571 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 0); 572 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 0); 573 } else { 574 /* Enable the watchdog */ 575 if (period > ITESIO_WDT_MAXTIMO || period < 1) 576 period = smw->smw_period = ITESIO_WDT_MAXTIMO; 577 578 period *= 2; 579 580 /* set the timeout and start the watchdog */ 581 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 582 period >> 8); 583 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 584 period & 0xff); 585 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CNF, 586 ITESIO_WDT_CNF_SECS | ITESIO_WDT_CNF_KRST | 587 ITESIO_WDT_CNF_PWROK); 588 } 589 /* we are done, exit MB PNP mode */ 590 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 591 592 return 0; 593 } 594 595 static int 596 itesio_wdt_tickle(struct sysmon_wdog *smw) 597 { 598 struct itesio_softc *sc = smw->smw_cookie; 599 int period = smw->smw_period * 2; 600 601 /* refresh timeout value and exit */ 602 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 603 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 604 ITESIO_WDT_LDN); 605 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 606 period >> 8); 607 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 608 period & 0xff); 609 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 610 611 return 0; 612 } 613
Indexes created Tue Sep 30 20:09:53 GMT 2025