itesio_isa.c revision 1.17
1 /* $NetBSD: itesio_isa.c,v 1.17 2008/04/26 19:01:53 xtraeme 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 1.17 2008/04/26 19:01:53 xtraeme 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 int itesio_wdt_setmode(struct sysmon_wdog *); 96 static int itesio_wdt_tickle(struct sysmon_wdog *); 97 98 /* rfact values for voltage sensors */ 99 static const int itesio_vrfact[] = { 100 RFACT_NONE, /* VCORE_A */ 101 RFACT_NONE, /* VCORE_B */ 102 RFACT_NONE, /* +3.3V */ 103 RFACT(68, 100), /* +5V */ 104 RFACT(30, 10), /* +12V */ 105 RFACT(21, 10), /* -5V */ 106 RFACT(83, 20), /* -12V */ 107 RFACT(68, 100), /* STANDBY */ 108 RFACT_NONE /* VBAT */ 109 }; 110 111 static int 112 itesio_isa_match(device_t parent, cfdata_t match, void *aux) 113 { 114 struct isa_attach_args *ia = aux; 115 bus_space_handle_t ioh; 116 uint16_t cr; 117 118 /* Must supply an address */ 119 if (ia->ia_nio < 1) 120 return 0; 121 122 if (ISA_DIRECT_CONFIG(ia)) 123 return 0; 124 125 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 126 return 0; 127 128 if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 2, 0, &ioh)) 129 return 0; 130 131 itesio_enter(ia->ia_iot, ioh); 132 cr = (itesio_readreg(ia->ia_iot, ioh, ITESIO_CHIPID1) << 8); 133 cr |= itesio_readreg(ia->ia_iot, ioh, ITESIO_CHIPID2); 134 itesio_exit(ia->ia_iot, ioh); 135 bus_space_unmap(ia->ia_iot, ioh, 2); 136 137 switch (cr) { 138 case ITESIO_ID8705: 139 case ITESIO_ID8712: 140 case ITESIO_ID8716: 141 case ITESIO_ID8718: 142 case ITESIO_ID8726: 143 ia->ia_nio = 1; 144 ia->ia_io[0].ir_size = 2; 145 ia->ia_niomem = 0; 146 ia->ia_nirq = 0; 147 ia->ia_ndrq = 0; 148 return 1; 149 default: 150 return 0; 151 } 152 } 153 154 static void 155 itesio_isa_attach(device_t parent, device_t self, void *aux) 156 { 157 struct itesio_softc *sc = device_private(self); 158 struct isa_attach_args *ia = aux; 159 int i; 160 uint8_t cr; 161 162 sc->sc_iot = ia->ia_iot; 163 164 if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 2, 0, 165 &sc->sc_ioh)) { 166 aprint_error(": can't map i/o space\n"); 167 return; 168 } 169 170 aprint_naive("\n"); 171 172 /* 173 * Enter to the Super I/O MB PNP mode. 174 */ 175 itesio_enter(sc->sc_iot, sc->sc_ioh); 176 /* 177 * Get info from the Super I/O Global Configuration Registers: 178 * Chip IDs and Device Revision. 179 */ 180 sc->sc_chipid = (itesio_readreg(sc->sc_iot, sc->sc_ioh, 181 ITESIO_CHIPID1) << 8); 182 sc->sc_chipid |= itesio_readreg(sc->sc_iot, sc->sc_ioh, 183 ITESIO_CHIPID2); 184 sc->sc_devrev = (itesio_readreg(sc->sc_iot, sc->sc_ioh, 185 ITESIO_DEVREV) & 0x0f); 186 /* 187 * Select the EC LDN to get the Base Address. 188 */ 189 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_LDNSEL, ITESIO_EC_LDN); 190 sc->sc_hwmon_baseaddr = 191 (itesio_readreg(sc->sc_iot, sc->sc_ioh, ITESIO_EC_MSB) << 8); 192 sc->sc_hwmon_baseaddr |= itesio_readreg(sc->sc_iot, sc->sc_ioh, 193 ITESIO_EC_LSB); 194 /* 195 * We are done, exit MB PNP mode. 196 */ 197 itesio_exit(sc->sc_iot, sc->sc_ioh); 198 199 aprint_normal(": iTE IT%4xF Super I/O (rev %d)\n", 200 sc->sc_chipid, sc->sc_devrev); 201 aprint_normal_dev(self, "Hardware Monitor registers at 0x%x\n", 202 sc->sc_hwmon_baseaddr); 203 204 if (bus_space_map(sc->sc_ec_iot, sc->sc_hwmon_baseaddr, 8, 0, 205 &sc->sc_ec_ioh)) { 206 aprint_error_dev(self, "cannot map hwmon i/o space\n"); 207 goto out2; 208 } 209 210 sc->sc_hwmon_mapped = true; 211 212 /* Activate monitoring */ 213 cr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 214 SET(cr, 0x01); 215 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, cr); 216 217 #ifdef notyet 218 /* Enable beep alarms */ 219 cr = itesio_ecreadreg(sc, ITESIO_EC_BEEPEER); 220 SET(cr, 0x02); /* Voltage exceeds limit */ 221 SET(cr, 0x04); /* Temperature exceeds limit */ 222 itesio_ecwritereg(sc, ITESIO_EC_BEEPEER, cr); 223 #endif 224 225 /* 226 * Initialize and attach sensors. 227 */ 228 itesio_setup_sensors(sc); 229 sc->sc_sme = sysmon_envsys_create(); 230 for (i = 0; i < IT_NUM_SENSORS; i++) { 231 if (sysmon_envsys_sensor_attach(sc->sc_sme, 232 &sc->sc_sensor[i])) { 233 sysmon_envsys_destroy(sc->sc_sme); 234 goto out; 235 } 236 } 237 /* 238 * Hook into the system monitor. 239 */ 240 sc->sc_sme->sme_name = device_xname(self); 241 sc->sc_sme->sme_cookie = sc; 242 sc->sc_sme->sme_refresh = itesio_refresh; 243 244 if ((i = sysmon_envsys_register(sc->sc_sme))) { 245 aprint_error_dev(self, 246 "unable to register with sysmon (%d)\n", i); 247 sysmon_envsys_destroy(sc->sc_sme); 248 goto out; 249 } 250 sc->sc_hwmon_enabled = true; 251 252 if (!pmf_device_register(self, NULL, NULL)) 253 aprint_error_dev(self, "couldn't establish power handler\n"); 254 255 /* The IT8705 doesn't support the WDT */ 256 if (sc->sc_chipid == ITESIO_ID8705) 257 goto out2; 258 259 /* 260 * Initialize the watchdog timer. 261 */ 262 sc->sc_smw.smw_name = device_xname(self); 263 sc->sc_smw.smw_cookie = sc; 264 sc->sc_smw.smw_setmode = itesio_wdt_setmode; 265 sc->sc_smw.smw_tickle = itesio_wdt_tickle; 266 sc->sc_smw.smw_period = 60; 267 268 if (sysmon_wdog_register(&sc->sc_smw)) { 269 aprint_error_dev(self, "unable to register watchdog timer\n"); 270 goto out2; 271 } 272 sc->sc_wdt_enabled = true; 273 aprint_normal_dev(self, "Watchdog Timer present\n"); 274 return; 275 276 out: 277 bus_space_unmap(sc->sc_ec_iot, sc->sc_ec_ioh, 8); 278 out2: 279 bus_space_unmap(sc->sc_iot, sc->sc_ioh, 2); 280 } 281 282 static int 283 itesio_isa_detach(device_t self, int flags) 284 { 285 struct itesio_softc *sc = device_private(self); 286 287 if (sc->sc_hwmon_enabled) 288 sysmon_envsys_unregister(sc->sc_sme); 289 if (sc->sc_hwmon_mapped) 290 bus_space_unmap(sc->sc_ec_iot, sc->sc_ec_ioh, 8); 291 if (sc->sc_wdt_enabled) { 292 sysmon_wdog_unregister(&sc->sc_smw); 293 bus_space_unmap(sc->sc_iot, sc->sc_ioh, 2); 294 } 295 296 return 0; 297 } 298 299 /* 300 * Functions to read/write to the Environmental Controller. 301 */ 302 static uint8_t 303 itesio_ecreadreg(struct itesio_softc *sc, int reg) 304 { 305 bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 306 return bus_space_read_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_DATA); 307 } 308 309 static void 310 itesio_ecwritereg(struct itesio_softc *sc, int reg, int val) 311 { 312 bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 313 bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_DATA, val); 314 } 315 316 /* 317 * Functions to enter/exit/read/write to the Super I/O. 318 */ 319 static uint8_t 320 itesio_readreg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg) 321 { 322 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 323 return bus_space_read_1(iot, ioh, ITESIO_DATA); 324 } 325 326 static void 327 itesio_writereg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, int val) 328 { 329 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 330 bus_space_write_1(iot, ioh, ITESIO_DATA, val); 331 } 332 333 static void 334 itesio_enter(bus_space_tag_t iot, bus_space_handle_t ioh) 335 { 336 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x87); 337 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x01); 338 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 339 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 340 } 341 342 static void 343 itesio_exit(bus_space_tag_t iot, bus_space_handle_t ioh) 344 { 345 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x02); 346 bus_space_write_1(iot, ioh, ITESIO_DATA, 0x02); 347 } 348 349 350 #define COPYDESCR(x, y) \ 351 do { \ 352 strlcpy((x), (y), sizeof(x)); \ 353 } while (0) 354 /* 355 * sysmon_envsys(9) glue. 356 */ 357 static void 358 itesio_setup_sensors(struct itesio_softc *sc) 359 { 360 int i; 361 362 /* temperatures */ 363 for (i = 0; i < IT_VOLTSTART_IDX; i++) 364 sc->sc_sensor[i].units = ENVSYS_STEMP; 365 366 COPYDESCR(sc->sc_sensor[0].desc, "CPU Temp"); 367 COPYDESCR(sc->sc_sensor[1].desc, "System Temp"); 368 COPYDESCR(sc->sc_sensor[2].desc, "Aux Temp"); 369 370 /* voltages */ 371 for (i = IT_VOLTSTART_IDX; i < IT_FANSTART_IDX; i++) { 372 sc->sc_sensor[i].units = ENVSYS_SVOLTS_DC; 373 sc->sc_sensor[i].flags = ENVSYS_FCHANGERFACT; 374 } 375 376 COPYDESCR(sc->sc_sensor[3].desc, "VCORE_A"); 377 COPYDESCR(sc->sc_sensor[4].desc, "VCORE_B"); 378 COPYDESCR(sc->sc_sensor[5].desc, "+3.3V"); 379 COPYDESCR(sc->sc_sensor[6].desc, "+5V"); 380 COPYDESCR(sc->sc_sensor[7].desc, "+12V"); 381 COPYDESCR(sc->sc_sensor[8].desc, "-5V"); 382 COPYDESCR(sc->sc_sensor[9].desc, "-12V"); 383 COPYDESCR(sc->sc_sensor[10].desc, "STANDBY"); 384 COPYDESCR(sc->sc_sensor[11].desc, "VBAT"); 385 386 /* fans */ 387 for (i = IT_FANSTART_IDX; i < IT_NUM_SENSORS; i++) 388 sc->sc_sensor[i].units = ENVSYS_SFANRPM; 389 390 COPYDESCR(sc->sc_sensor[12].desc, "CPU Fan"); 391 COPYDESCR(sc->sc_sensor[13].desc, "System Fan"); 392 COPYDESCR(sc->sc_sensor[14].desc, "Aux Fan"); 393 } 394 #undef COPYDESCR 395 396 static void 397 itesio_refresh_temp(struct itesio_softc *sc, envsys_data_t *edata) 398 { 399 int sdata; 400 401 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORTEMPBASE + edata->sensor); 402 /* sensor is not connected or reporting invalid data */ 403 if (sdata == 0 || sdata >= 0xfa) { 404 edata->state = ENVSYS_SINVALID; 405 return; 406 } 407 408 DPRINTF(("%s: sdata[temp%d] 0x%x\n", __func__, edata->sensor, sdata)); 409 /* Convert temperature to uK */ 410 edata->value_cur = sdata * 1000000 + 273150000; 411 edata->state = ENVSYS_SVALID; 412 } 413 414 static void 415 itesio_refresh_volts(struct itesio_softc *sc, envsys_data_t *edata) 416 { 417 uint8_t vbatcr = 0; 418 int i, sdata; 419 420 i = edata->sensor - IT_VOLTSTART_IDX; 421 422 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORVOLTBASE + i); 423 /* not connected */ 424 if (sdata == 0 || sdata == 0xff) { 425 edata->state = ENVSYS_SINVALID; 426 return; 427 } 428 429 /* 430 * update VBAT voltage reading every time we read it, to get 431 * latest value. 432 */ 433 if (i == 8) { 434 vbatcr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 435 SET(vbatcr, ITESIO_EC_UPDATEVBAT); 436 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, vbatcr); 437 } 438 439 DPRINTF(("%s: sdata[volt%d] 0x%x\n", __func__, i, sdata)); 440 441 /* voltage returned as (mV << 4) */ 442 edata->value_cur = (sdata << 4); 443 /* negative values */ 444 if (i == 5 || i == 6) 445 edata->value_cur -= ITESIO_EC_VREF; 446 /* rfact is (factor * 10^4) */ 447 edata->value_cur *= itesio_vrfact[i]; 448 if (edata->rfact) 449 edata->value_cur += edata->rfact; 450 /* division by 10 gets us back to uVDC */ 451 edata->value_cur /= 10; 452 if (i == 5 || i == 6) 453 edata->value_cur += ITESIO_EC_VREF * 1000; 454 455 edata->state = ENVSYS_SVALID; 456 } 457 458 static void 459 itesio_refresh_fans(struct itesio_softc *sc, envsys_data_t *edata) 460 { 461 uint8_t mode = 0; 462 uint16_t sdata = 0; 463 int i, divisor, odivisor, ndivisor; 464 465 i = edata->sensor - IT_FANSTART_IDX; 466 divisor = odivisor = ndivisor = 0; 467 468 if (sc->sc_chipid == ITESIO_ID8705 || sc->sc_chipid == ITESIO_ID8712) { 469 /* 470 * Use the Fan Tachometer Divisor Register for 471 * IT8705F and IT8712F. 472 */ 473 divisor = odivisor = ndivisor = 474 itesio_ecreadreg(sc, ITESIO_EC_FAN_TDR); 475 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 476 if (sdata == 0xff) { 477 edata->state = ENVSYS_SINVALID; 478 if (i == 2) 479 ndivisor |= 0x40; 480 else { 481 ndivisor &= ~(7 << (i * 3)); 482 ndivisor |= ((divisor + 1) & 7) << (i * 3); 483 } 484 } else { 485 if (i == 2) 486 divisor = divisor & 1 ? 3 : 1; 487 488 if ((sdata << (divisor & 7)) == 0) 489 edata->state = ENVSYS_SINVALID; 490 else { 491 edata->value_cur = 492 1350000 / (sdata << (divisor & 7)); 493 edata->state = ENVSYS_SVALID; 494 } 495 } 496 DPRINTF(("%s: 8bit sdata[fan%d] 0x%x div: 0x%x\n", __func__, 497 i, sdata, divisor)); 498 if (ndivisor != odivisor) 499 itesio_ecwritereg(sc, ITESIO_EC_FAN_TDR, ndivisor); 500 } else { 501 mode = itesio_ecreadreg(sc, ITESIO_EC_FAN16_CER); 502 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 503 if (mode & (1 << i)) 504 sdata += (itesio_ecreadreg(sc, 505 ITESIO_EC_SENSORFANEXTBASE + i) << 8); 506 edata->state = ENVSYS_SVALID; 507 if (sdata == 0 || 508 sdata == ((mode & (1 << i)) ? 0xffff : 0xff)) 509 edata->state = ENVSYS_SINVALID; 510 else { 511 edata->value_cur = 1350000 / 2 / sdata; 512 edata->state = ENVSYS_SVALID; 513 } 514 DPRINTF(("%s: 16bit sdata[fan%d] 0x%x\n", __func__, i, sdata)); 515 } 516 } 517 518 static void 519 itesio_refresh(struct sysmon_envsys *sme, struct envsys_data *edata) 520 { 521 struct itesio_softc *sc = sme->sme_cookie; 522 523 if (edata->sensor < IT_VOLTSTART_IDX) 524 itesio_refresh_temp(sc, edata); 525 else if (edata->sensor >= IT_VOLTSTART_IDX && 526 edata->sensor < IT_FANSTART_IDX) 527 itesio_refresh_volts(sc, edata); 528 else 529 itesio_refresh_fans(sc, edata); 530 } 531 532 static int 533 itesio_wdt_setmode(struct sysmon_wdog *smw) 534 { 535 struct itesio_softc *sc = smw->smw_cookie; 536 int period = smw->smw_period; 537 538 /* Enter MB PNP mode and select the WDT LDN */ 539 itesio_enter(sc->sc_iot, sc->sc_ioh); 540 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_LDNSEL, ITESIO_WDT_LDN); 541 542 if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 543 /* Disable the watchdog */ 544 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_CTL, 0); 545 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_CNF, 0); 546 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_MSB, 0); 547 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_LSB, 0); 548 } else { 549 /* Enable the watchdog */ 550 if (period > ITESIO_WDT_MAXTIMO || period < 1) 551 period = smw->smw_period = ITESIO_WDT_MAXTIMO; 552 553 period *= 2; 554 555 /* set the timeout and start the watchdog */ 556 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_MSB, 557 period >> 8); 558 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_LSB, 559 period & 0xff); 560 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_CNF, 561 ITESIO_WDT_CNF_SECS | ITESIO_WDT_CNF_KRST | 562 ITESIO_WDT_CNF_PWROK); 563 } 564 /* we are done, exit MB PNP mode */ 565 itesio_exit(sc->sc_iot, sc->sc_ioh); 566 567 return 0; 568 } 569 570 static int 571 itesio_wdt_tickle(struct sysmon_wdog *smw) 572 { 573 struct itesio_softc *sc = smw->smw_cookie; 574 int period = smw->smw_period * 2; 575 576 /* refresh timeout value and exit */ 577 itesio_enter(sc->sc_iot, sc->sc_ioh); 578 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_LDNSEL, ITESIO_WDT_LDN); 579 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_MSB, 580 period >> 8); 581 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_LSB, 582 period & 0xff); 583 itesio_exit(sc->sc_iot, sc->sc_ioh); 584 585 return 0; 586 } 587
Indexes created Tue Sep 30 20:09:53 GMT 2025