itesio_isa.c revision 1.16
1 /* $NetBSD: itesio_isa.c,v 1.16 2008/04/26 12:59:24 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 1.16 2008/04/26 12:59:24 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 ia->ia_nio = 1; 143 ia->ia_io[0].ir_size = 2; 144 ia->ia_niomem = 0; 145 ia->ia_nirq = 0; 146 ia->ia_ndrq = 0; 147 return 1; 148 default: 149 return 0; 150 } 151 } 152 153 static void 154 itesio_isa_attach(device_t parent, device_t self, void *aux) 155 { 156 struct itesio_softc *sc = device_private(self); 157 struct isa_attach_args *ia = aux; 158 int i; 159 uint8_t cr; 160 161 sc->sc_iot = ia->ia_iot; 162 163 if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 2, 0, 164 &sc->sc_ioh)) { 165 aprint_error(": can't map i/o space\n"); 166 return; 167 } 168 169 aprint_naive("\n"); 170 171 /* 172 * Enter to the Super I/O MB PNP mode. 173 */ 174 itesio_enter(sc->sc_iot, sc->sc_ioh); 175 /* 176 * Get info from the Super I/O Global Configuration Registers: 177 * Chip IDs and Device Revision. 178 */ 179 sc->sc_chipid = (itesio_readreg(sc->sc_iot, sc->sc_ioh, 180 ITESIO_CHIPID1) << 8); 181 sc->sc_chipid |= itesio_readreg(sc->sc_iot, sc->sc_ioh, 182 ITESIO_CHIPID2); 183 sc->sc_devrev = (itesio_readreg(sc->sc_iot, sc->sc_ioh, 184 ITESIO_DEVREV) & 0x0f); 185 /* 186 * Select the EC LDN to get the Base Address. 187 */ 188 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_LDNSEL, ITESIO_EC_LDN); 189 sc->sc_hwmon_baseaddr = 190 (itesio_readreg(sc->sc_iot, sc->sc_ioh, ITESIO_EC_MSB) << 8); 191 sc->sc_hwmon_baseaddr |= itesio_readreg(sc->sc_iot, sc->sc_ioh, 192 ITESIO_EC_LSB); 193 /* 194 * We are done, exit MB PNP mode. 195 */ 196 itesio_exit(sc->sc_iot, sc->sc_ioh); 197 198 aprint_normal(": iTE IT%4xF Super I/O (rev %d)\n", 199 sc->sc_chipid, sc->sc_devrev); 200 aprint_normal_dev(self, "Hardware Monitor registers at 0x%x\n", 201 sc->sc_hwmon_baseaddr); 202 203 if (bus_space_map(sc->sc_ec_iot, sc->sc_hwmon_baseaddr, 8, 0, 204 &sc->sc_ec_ioh)) { 205 aprint_error_dev(self, "cannot map hwmon i/o space\n"); 206 goto out2; 207 } 208 209 sc->sc_hwmon_mapped = true; 210 211 /* Activate monitoring */ 212 cr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 213 SET(cr, 0x01); 214 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, cr); 215 216 #ifdef notyet 217 /* Enable beep alarms */ 218 cr = itesio_ecreadreg(sc, ITESIO_EC_BEEPEER); 219 SET(cr, 0x02); /* Voltage exceeds limit */ 220 SET(cr, 0x04); /* Temperature exceeds limit */ 221 itesio_ecwritereg(sc, ITESIO_EC_BEEPEER, cr); 222 #endif 223 224 /* 225 * Initialize and attach sensors. 226 */ 227 itesio_setup_sensors(sc); 228 sc->sc_sme = sysmon_envsys_create(); 229 for (i = 0; i < IT_NUM_SENSORS; i++) { 230 if (sysmon_envsys_sensor_attach(sc->sc_sme, 231 &sc->sc_sensor[i])) { 232 sysmon_envsys_destroy(sc->sc_sme); 233 goto out; 234 } 235 } 236 /* 237 * Hook into the system monitor. 238 */ 239 sc->sc_sme->sme_name = device_xname(self); 240 sc->sc_sme->sme_cookie = sc; 241 sc->sc_sme->sme_refresh = itesio_refresh; 242 243 if ((i = sysmon_envsys_register(sc->sc_sme))) { 244 aprint_error_dev(self, 245 "unable to register with sysmon (%d)\n", i); 246 sysmon_envsys_destroy(sc->sc_sme); 247 goto out; 248 } 249 sc->sc_hwmon_enabled = true; 250 251 if (!pmf_device_register(self, NULL, NULL)) 252 aprint_error_dev(self, "couldn't establish power handler\n"); 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 return; 274 275 out: 276 bus_space_unmap(sc->sc_ec_iot, sc->sc_ec_ioh, 8); 277 out2: 278 bus_space_unmap(sc->sc_iot, sc->sc_ioh, 2); 279 } 280 281 static int 282 itesio_isa_detach(device_t self, int flags) 283 { 284 struct itesio_softc *sc = device_private(self); 285 286 if (sc->sc_hwmon_enabled) 287 sysmon_envsys_unregister(sc->sc_sme); 288 if (sc->sc_hwmon_mapped) 289 bus_space_unmap(sc->sc_ec_iot, sc->sc_ec_ioh, 8); 290 if (sc->sc_wdt_enabled) { 291 sysmon_wdog_unregister(&sc->sc_smw); 292 bus_space_unmap(sc->sc_iot, sc->sc_ioh, 2); 293 } 294 295 return 0; 296 } 297 298 /* 299 * Functions to read/write to the Environmental Controller. 300 */ 301 static uint8_t 302 itesio_ecreadreg(struct itesio_softc *sc, int reg) 303 { 304 bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 305 return bus_space_read_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_DATA); 306 } 307 308 static void 309 itesio_ecwritereg(struct itesio_softc *sc, int reg, int val) 310 { 311 bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 312 bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_DATA, val); 313 } 314 315 /* 316 * Functions to enter/exit/read/write to the Super I/O. 317 */ 318 static uint8_t 319 itesio_readreg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg) 320 { 321 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 322 return bus_space_read_1(iot, ioh, ITESIO_DATA); 323 } 324 325 static void 326 itesio_writereg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, int val) 327 { 328 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 329 bus_space_write_1(iot, ioh, ITESIO_DATA, val); 330 } 331 332 static void 333 itesio_enter(bus_space_tag_t iot, bus_space_handle_t ioh) 334 { 335 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x87); 336 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x01); 337 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 338 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 339 } 340 341 static void 342 itesio_exit(bus_space_tag_t iot, bus_space_handle_t ioh) 343 { 344 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x02); 345 bus_space_write_1(iot, ioh, ITESIO_DATA, 0x02); 346 } 347 348 349 #define COPYDESCR(x, y) \ 350 do { \ 351 strlcpy((x), (y), sizeof(x)); \ 352 } while (0) 353 /* 354 * sysmon_envsys(9) glue. 355 */ 356 static void 357 itesio_setup_sensors(struct itesio_softc *sc) 358 { 359 int i; 360 361 /* temperatures */ 362 for (i = 0; i < IT_VOLTSTART_IDX; i++) 363 sc->sc_sensor[i].units = ENVSYS_STEMP; 364 365 COPYDESCR(sc->sc_sensor[0].desc, "CPU Temp"); 366 COPYDESCR(sc->sc_sensor[1].desc, "System Temp"); 367 COPYDESCR(sc->sc_sensor[2].desc, "Aux Temp"); 368 369 /* voltages */ 370 for (i = IT_VOLTSTART_IDX; i < IT_FANSTART_IDX; i++) { 371 sc->sc_sensor[i].units = ENVSYS_SVOLTS_DC; 372 sc->sc_sensor[i].flags = ENVSYS_FCHANGERFACT; 373 } 374 375 COPYDESCR(sc->sc_sensor[3].desc, "VCORE_A"); 376 COPYDESCR(sc->sc_sensor[4].desc, "VCORE_B"); 377 COPYDESCR(sc->sc_sensor[5].desc, "+3.3V"); 378 COPYDESCR(sc->sc_sensor[6].desc, "+5V"); 379 COPYDESCR(sc->sc_sensor[7].desc, "+12V"); 380 COPYDESCR(sc->sc_sensor[8].desc, "-5V"); 381 COPYDESCR(sc->sc_sensor[9].desc, "-12V"); 382 COPYDESCR(sc->sc_sensor[10].desc, "STANDBY"); 383 COPYDESCR(sc->sc_sensor[11].desc, "VBAT"); 384 385 /* fans */ 386 for (i = IT_FANSTART_IDX; i < IT_NUM_SENSORS; i++) 387 sc->sc_sensor[i].units = ENVSYS_SFANRPM; 388 389 COPYDESCR(sc->sc_sensor[12].desc, "CPU Fan"); 390 COPYDESCR(sc->sc_sensor[13].desc, "System Fan"); 391 COPYDESCR(sc->sc_sensor[14].desc, "Aux Fan"); 392 } 393 #undef COPYDESCR 394 395 static void 396 itesio_refresh_temp(struct itesio_softc *sc, envsys_data_t *edata) 397 { 398 int sdata; 399 400 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORTEMPBASE + edata->sensor); 401 /* sensor is not connected or reporting invalid data */ 402 if (sdata == 0 || sdata >= 0xfa) { 403 edata->state = ENVSYS_SINVALID; 404 return; 405 } 406 407 DPRINTF(("%s: sdata[temp%d] 0x%x\n", __func__, edata->sensor, sdata)); 408 /* Convert temperature to uK */ 409 edata->value_cur = sdata * 1000000 + 273150000; 410 edata->state = ENVSYS_SVALID; 411 } 412 413 static void 414 itesio_refresh_volts(struct itesio_softc *sc, envsys_data_t *edata) 415 { 416 uint8_t vbatcr = 0; 417 int i, sdata; 418 419 i = edata->sensor - IT_VOLTSTART_IDX; 420 421 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORVOLTBASE + i); 422 /* not connected */ 423 if (sdata == 0 || sdata == 0xff) { 424 edata->state = ENVSYS_SINVALID; 425 return; 426 } 427 428 /* 429 * update VBAT voltage reading every time we read it, to get 430 * latest value. 431 */ 432 if (i == 8) { 433 vbatcr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 434 SET(vbatcr, ITESIO_EC_UPDATEVBAT); 435 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, vbatcr); 436 } 437 438 DPRINTF(("%s: sdata[volt%d] 0x%x\n", __func__, i, sdata)); 439 440 /* voltage returned as (mV << 4) */ 441 edata->value_cur = (sdata << 4); 442 /* negative values */ 443 if (i == 5 || i == 6) 444 edata->value_cur -= ITESIO_EC_VREF; 445 /* rfact is (factor * 10^4) */ 446 edata->value_cur *= itesio_vrfact[i]; 447 if (edata->rfact) 448 edata->value_cur += edata->rfact; 449 /* division by 10 gets us back to uVDC */ 450 edata->value_cur /= 10; 451 if (i == 5 || i == 6) 452 edata->value_cur += ITESIO_EC_VREF * 1000; 453 454 edata->state = ENVSYS_SVALID; 455 } 456 457 static void 458 itesio_refresh_fans(struct itesio_softc *sc, envsys_data_t *edata) 459 { 460 uint8_t mode = 0; 461 uint16_t sdata = 0; 462 int i, divisor, odivisor, ndivisor; 463 464 i = edata->sensor - IT_FANSTART_IDX; 465 divisor = odivisor = ndivisor = 0; 466 467 if (sc->sc_chipid == ITESIO_ID8705 || sc->sc_chipid == ITESIO_ID8712) { 468 /* 469 * Use the Fan Tachometer Divisor Register for 470 * IT8705F and IT8712F. 471 */ 472 divisor = odivisor = ndivisor = 473 itesio_ecreadreg(sc, ITESIO_EC_FAN_TDR); 474 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 475 if (sdata == 0xff) { 476 edata->state = ENVSYS_SINVALID; 477 if (i == 2) 478 ndivisor |= 0x40; 479 else { 480 ndivisor &= ~(7 << (i * 3)); 481 ndivisor |= ((divisor + 1) & 7) << (i * 3); 482 } 483 } else { 484 if (i == 2) 485 divisor = divisor & 1 ? 3 : 1; 486 487 if ((sdata << (divisor & 7)) == 0) 488 edata->state = ENVSYS_SINVALID; 489 else { 490 edata->value_cur = 491 1350000 / (sdata << (divisor & 7)); 492 edata->state = ENVSYS_SVALID; 493 } 494 } 495 DPRINTF(("%s: 8bit sdata[fan%d] 0x%x div: 0x%x\n", __func__, 496 i, sdata, divisor)); 497 if (ndivisor != odivisor) 498 itesio_ecwritereg(sc, ITESIO_EC_FAN_TDR, ndivisor); 499 } else { 500 mode = itesio_ecreadreg(sc, ITESIO_EC_FAN16_CER); 501 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 502 if (mode & (1 << i)) 503 sdata += (itesio_ecreadreg(sc, 504 ITESIO_EC_SENSORFANEXTBASE + i) << 8); 505 edata->state = ENVSYS_SVALID; 506 if (sdata == 0 || 507 sdata == ((mode & (1 << i)) ? 0xffff : 0xff)) 508 edata->state = ENVSYS_SINVALID; 509 else { 510 edata->value_cur = 1350000 / 2 / sdata; 511 edata->state = ENVSYS_SVALID; 512 } 513 DPRINTF(("%s: 16bit sdata[fan%d] 0x%x\n", __func__, i, sdata)); 514 } 515 } 516 517 static void 518 itesio_refresh(struct sysmon_envsys *sme, struct envsys_data *edata) 519 { 520 struct itesio_softc *sc = sme->sme_cookie; 521 522 if (edata->sensor < IT_VOLTSTART_IDX) 523 itesio_refresh_temp(sc, edata); 524 else if (edata->sensor >= IT_VOLTSTART_IDX && 525 edata->sensor < IT_FANSTART_IDX) 526 itesio_refresh_volts(sc, edata); 527 else 528 itesio_refresh_fans(sc, edata); 529 } 530 531 static int 532 itesio_wdt_setmode(struct sysmon_wdog *smw) 533 { 534 struct itesio_softc *sc = smw->smw_cookie; 535 int period = smw->smw_period; 536 537 /* Enter MB PNP mode and select the WDT LDN */ 538 itesio_enter(sc->sc_iot, sc->sc_ioh); 539 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_LDNSEL, ITESIO_WDT_LDN); 540 541 if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 542 /* Disable the watchdog */ 543 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_CTL, 0); 544 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_CNF, 0); 545 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_MSB, 0); 546 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_LSB, 0); 547 } else { 548 /* Enable the watchdog */ 549 if (period > ITESIO_WDT_MAXTIMO || period < 1) 550 period = smw->smw_period = ITESIO_WDT_MAXTIMO; 551 552 period *= 2; 553 554 /* set the timeout and start the watchdog */ 555 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_MSB, 556 period >> 8); 557 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_LSB, 558 period & 0xff); 559 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_CNF, 560 ITESIO_WDT_CNF_SECS | ITESIO_WDT_CNF_KRST | 561 ITESIO_WDT_CNF_PWROK); 562 } 563 /* we are done, exit MB PNP mode */ 564 itesio_exit(sc->sc_iot, sc->sc_ioh); 565 566 return 0; 567 } 568 569 static int 570 itesio_wdt_tickle(struct sysmon_wdog *smw) 571 { 572 struct itesio_softc *sc = smw->smw_cookie; 573 int period = smw->smw_period * 2; 574 575 /* refresh timeout value and exit */ 576 itesio_enter(sc->sc_iot, sc->sc_ioh); 577 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_LDNSEL, ITESIO_WDT_LDN); 578 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_MSB, 579 period >> 8); 580 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_LSB, 581 period & 0xff); 582 itesio_exit(sc->sc_iot, sc->sc_ioh); 583 584 return 0; 585 } 586
Indexes created Tue Sep 30 20:09:53 GMT 2025