itesio_isa.c revision 1.10
1 /* $NetBSD: itesio_isa.c,v 1.10 2007/12/29 06:15:47 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 <juan (at) xtrarom.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 Hardware monitor part in the Environmental Controller. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: itesio_isa.c,v 1.10 2007/12/29 06:15:47 xtraeme Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/kernel.h> 40 #include <sys/device.h> 41 42 #include <sys/bus.h> 43 44 #include <dev/isa/isareg.h> 45 #include <dev/isa/isavar.h> 46 47 #include <dev/sysmon/sysmonvar.h> 48 49 #include <dev/isa/itesio_isavar.h> 50 51 #define IT_VOLTSTART_IDX 3 /* voltage start index */ 52 #define IT_FANSTART_IDX 12 /* fan start index */ 53 54 #if defined(ITESIO_DEBUG) 55 #define DPRINTF(x) do { printf x; } while (0) 56 #else 57 #define DPRINTF(x) 58 #endif 59 60 /* 61 * IT87-compatible chips can typically measure voltages up to 4.096 V. 62 * To measure higher voltages the input is attenuated with (external) 63 * resistors. Negative voltages are measured using a reference 64 * voltage. So we have to convert the sensor values back to real 65 * voltages by applying the appropriate resistor factor. 66 */ 67 #define RFACT_NONE 10000 68 #define RFACT(x, y) (RFACT_NONE * ((x) + (y)) / (y)) 69 70 /* autoconf(9) functions */ 71 static int itesio_isa_match(device_t, struct cfdata *, void *); 72 static void itesio_isa_attach(device_t, device_t, void *); 73 static int itesio_isa_detach(device_t, int); 74 75 CFATTACH_DECL_NEW(itesio, sizeof(struct itesio_softc), 76 itesio_isa_match, itesio_isa_attach, itesio_isa_detach, NULL); 77 78 /* driver functions */ 79 static uint8_t itesio_ecreadreg(struct itesio_softc *, int); 80 static void itesio_ecwritereg(struct itesio_softc *, int, int); 81 static uint8_t itesio_readreg(bus_space_tag_t, bus_space_handle_t, int); 82 static void itesio_writereg(bus_space_tag_t, bus_space_handle_t, int, int); 83 static void itesio_enter(bus_space_tag_t, bus_space_handle_t); 84 static void itesio_exit(bus_space_tag_t, bus_space_handle_t); 85 86 /* sysmon_envsys(9) glue */ 87 static void itesio_setup_sensors(struct itesio_softc *); 88 static void itesio_refresh_temp(struct itesio_softc *, envsys_data_t *); 89 static void itesio_refresh_volts(struct itesio_softc *, envsys_data_t *); 90 static void itesio_refresh_fans(struct itesio_softc *, envsys_data_t *); 91 static void itesio_refresh(struct sysmon_envsys *, envsys_data_t *); 92 93 /* sysmon_wdog glue */ 94 static int itesio_wdt_setmode(struct sysmon_wdog *); 95 static int itesio_wdt_tickle(struct sysmon_wdog *); 96 97 /* rfact values for voltage sensors */ 98 static const int itesio_vrfact[] = { 99 RFACT_NONE, /* VCORE_A */ 100 RFACT_NONE, /* VCORE_B */ 101 RFACT_NONE, /* +3.3V */ 102 RFACT(68, 100), /* +5V */ 103 RFACT(30, 10), /* +12V */ 104 RFACT(21, 10), /* -12V */ 105 RFACT(83, 20), /* -5V */ 106 RFACT(68, 100), /* STANDBY */ 107 RFACT_NONE /* VBAT */ 108 }; 109 110 static int 111 itesio_isa_match(device_t parent, struct cfdata *match, void *aux) 112 { 113 struct isa_attach_args *ia = aux; 114 bus_space_handle_t ioh; 115 uint16_t cr; 116 117 /* Must supply an address */ 118 if (ia->ia_nio < 1) 119 return 0; 120 121 if (ISA_DIRECT_CONFIG(ia)) 122 return 0; 123 124 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 125 return 0; 126 127 if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 2, 0, &ioh)) 128 return 0; 129 130 itesio_enter(ia->ia_iot, ioh); 131 cr = (itesio_readreg(ia->ia_iot, ioh, ITESIO_CHIPID1) << 8); 132 cr |= itesio_readreg(ia->ia_iot, ioh, ITESIO_CHIPID2); 133 itesio_exit(ia->ia_iot, ioh); 134 bus_space_unmap(ia->ia_iot, ioh, 2); 135 136 switch (cr) { 137 case ITESIO_ID8705: 138 case ITESIO_ID8712: 139 case ITESIO_ID8716: 140 case ITESIO_ID8718: 141 ia->ia_nio = 1; 142 ia->ia_io[0].ir_size = 2; 143 ia->ia_niomem = 0; 144 ia->ia_nirq = 0; 145 ia->ia_ndrq = 0; 146 return 1; 147 default: 148 return 0; 149 } 150 } 151 152 static void 153 itesio_isa_attach(device_t parent, device_t self, void *aux) 154 { 155 struct itesio_softc *sc = device_private(self); 156 struct isa_attach_args *ia = aux; 157 int i; 158 uint8_t cr; 159 160 sc->sc_iot = ia->ia_iot; 161 162 if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 2, 0, 163 &sc->sc_ioh)) { 164 aprint_error(": can't map i/o space\n"); 165 return; 166 } 167 168 aprint_naive("\n"); 169 170 /* 171 * Enter to the Super I/O MB PNP mode. 172 */ 173 itesio_enter(sc->sc_iot, sc->sc_ioh); 174 /* 175 * Get info from the Super I/O Global Configuration Registers: 176 * Chip IDs and Device Revision. 177 */ 178 sc->sc_chipid = (itesio_readreg(sc->sc_iot, sc->sc_ioh, 179 ITESIO_CHIPID1) << 8); 180 sc->sc_chipid |= itesio_readreg(sc->sc_iot, sc->sc_ioh, 181 ITESIO_CHIPID2); 182 sc->sc_devrev = (itesio_readreg(sc->sc_iot, sc->sc_ioh, 183 ITESIO_DEVREV) & 0x0f); 184 /* 185 * Select the EC LDN to get the Base Address. 186 */ 187 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_LDNSEL, ITESIO_EC_LDN); 188 sc->sc_hwmon_baseaddr = 189 (itesio_readreg(sc->sc_iot, sc->sc_ioh, ITESIO_EC_MSB) << 8); 190 sc->sc_hwmon_baseaddr |= itesio_readreg(sc->sc_iot, sc->sc_ioh, 191 ITESIO_EC_LSB); 192 /* 193 * We are done, exit MB PNP mode. 194 */ 195 itesio_exit(sc->sc_iot, sc->sc_ioh); 196 197 aprint_normal(": iTE IT%4xF Super I/O (rev %d)\n", 198 sc->sc_chipid, sc->sc_devrev); 199 aprint_normal_dev(self, "Hardware Monitor registers at 0x%x\n", 200 sc->sc_hwmon_baseaddr); 201 202 if (bus_space_map(sc->sc_ec_iot, sc->sc_hwmon_baseaddr, 8, 0, 203 &sc->sc_ec_ioh)) { 204 aprint_error_dev(self, "cannot map hwmon i/o space\n"); 205 return; 206 } 207 208 sc->sc_hwmon_mapped = true; 209 210 /* Activate monitoring */ 211 cr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 212 SET(cr, 0x01); 213 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, cr); 214 215 #ifdef notyet 216 /* Enable beep alarms */ 217 cr = itesio_ecreadreg(sc, ITESIO_EC_BEEPEER); 218 SET(cr, 0x02); /* Voltage exceeds limit */ 219 SET(cr, 0x04); /* Temperature exceeds limit */ 220 itesio_ecwritereg(sc, ITESIO_EC_BEEPEER, cr); 221 #endif 222 223 /* 224 * Initialize and attach sensors. 225 */ 226 itesio_setup_sensors(sc); 227 sc->sc_sme = sysmon_envsys_create(); 228 for (i = 0; i < IT_NUM_SENSORS; i++) { 229 if (sysmon_envsys_sensor_attach(sc->sc_sme, 230 &sc->sc_sensor[i])) { 231 sysmon_envsys_destroy(sc->sc_sme); 232 return; 233 } 234 } 235 /* 236 * Hook into the system monitor. 237 */ 238 sc->sc_sme->sme_name = device_xname(self); 239 sc->sc_sme->sme_cookie = sc; 240 sc->sc_sme->sme_refresh = itesio_refresh; 241 242 if ((i = sysmon_envsys_register(sc->sc_sme))) { 243 aprint_error_dev(self, 244 "unable to register with sysmon (%d)\n", i); 245 sysmon_envsys_destroy(sc->sc_sme); 246 bus_space_unmap(sc->sc_ec_iot, sc->sc_ec_ioh, 8); 247 return; 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 a WDT */ 255 if (sc->sc_chipid == ITESIO_ID8705) { 256 bus_space_unmap(sc->sc_iot, sc->sc_ioh, 2); 257 return; 258 } 259 260 /* 261 * Initialize the watchdog timer. 262 */ 263 sc->sc_smw.smw_name = device_xname(self); 264 sc->sc_smw.smw_cookie = sc; 265 sc->sc_smw.smw_setmode = itesio_wdt_setmode; 266 sc->sc_smw.smw_tickle = itesio_wdt_tickle; 267 sc->sc_smw.smw_period = 60; 268 269 if (sysmon_wdog_register(&sc->sc_smw)) { 270 aprint_error_dev(self, "unable to register watchdog timer\n"); 271 bus_space_unmap(sc->sc_iot, sc->sc_ioh, 2); 272 return; 273 } 274 sc->sc_wdt_enabled = true; 275 aprint_normal_dev(self, "Watchdog Timer present\n"); 276 } 277 278 static int 279 itesio_isa_detach(device_t self, int flags) 280 { 281 struct itesio_softc *sc = device_private(self); 282 283 if (sc->sc_hwmon_enabled) 284 sysmon_envsys_unregister(sc->sc_sme); 285 if (sc->sc_hwmon_mapped) 286 bus_space_unmap(sc->sc_ec_iot, sc->sc_ec_ioh, 8); 287 if (sc->sc_wdt_enabled) { 288 sysmon_wdog_register(&sc->sc_smw); 289 bus_space_unmap(sc->sc_iot, sc->sc_ioh, 2); 290 } 291 292 return 0; 293 } 294 295 /* 296 * Functions to read/write to the Environmental Controller. 297 */ 298 static uint8_t 299 itesio_ecreadreg(struct itesio_softc *sc, int reg) 300 { 301 bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 302 return bus_space_read_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_DATA); 303 } 304 305 static void 306 itesio_ecwritereg(struct itesio_softc *sc, int reg, int val) 307 { 308 bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 309 bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_DATA, val); 310 } 311 312 /* 313 * Functions to enter/exit/read/write to the Super I/O. 314 */ 315 static uint8_t 316 itesio_readreg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg) 317 { 318 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 319 return bus_space_read_1(iot, ioh, ITESIO_DATA); 320 } 321 322 static void 323 itesio_writereg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, int val) 324 { 325 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 326 bus_space_write_1(iot, ioh, ITESIO_DATA, val); 327 } 328 329 static void 330 itesio_enter(bus_space_tag_t iot, bus_space_handle_t ioh) 331 { 332 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x87); 333 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x01); 334 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 335 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 336 } 337 338 static void 339 itesio_exit(bus_space_tag_t iot, bus_space_handle_t ioh) 340 { 341 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x02); 342 bus_space_write_1(iot, ioh, ITESIO_DATA, 0x02); 343 } 344 345 346 #define COPYDESCR(x, y) \ 347 do { \ 348 strlcpy((x), (y), sizeof(x)); \ 349 } while (0) 350 /* 351 * sysmon_envsys(9) glue. 352 */ 353 static void 354 itesio_setup_sensors(struct itesio_softc *sc) 355 { 356 int i; 357 358 /* temperatures */ 359 for (i = 0; i < IT_VOLTSTART_IDX; i++) 360 sc->sc_sensor[i].units = ENVSYS_STEMP; 361 362 COPYDESCR(sc->sc_sensor[0].desc, "CPU Temp"); 363 COPYDESCR(sc->sc_sensor[1].desc, "System Temp"); 364 COPYDESCR(sc->sc_sensor[2].desc, "Aux Temp"); 365 366 /* voltages */ 367 for (i = IT_VOLTSTART_IDX; i < IT_FANSTART_IDX; i++) { 368 sc->sc_sensor[i].units = ENVSYS_SVOLTS_DC; 369 sc->sc_sensor[i].flags = ENVSYS_FCHANGERFACT; 370 } 371 372 COPYDESCR(sc->sc_sensor[3].desc, "VCORE_A"); 373 COPYDESCR(sc->sc_sensor[4].desc, "VCORE_B"); 374 COPYDESCR(sc->sc_sensor[5].desc, "+3.3V"); 375 COPYDESCR(sc->sc_sensor[6].desc, "+5V"); 376 COPYDESCR(sc->sc_sensor[7].desc, "+12V"); 377 COPYDESCR(sc->sc_sensor[8].desc, "-12V"); 378 COPYDESCR(sc->sc_sensor[9].desc, "-5V"); 379 COPYDESCR(sc->sc_sensor[10].desc, "STANDBY"); 380 COPYDESCR(sc->sc_sensor[11].desc, "VBAT"); 381 382 /* fans */ 383 for (i = IT_FANSTART_IDX; i < IT_NUM_SENSORS; i++) 384 sc->sc_sensor[i].units = ENVSYS_SFANRPM; 385 386 COPYDESCR(sc->sc_sensor[12].desc, "CPU Fan"); 387 COPYDESCR(sc->sc_sensor[13].desc, "System Fan"); 388 COPYDESCR(sc->sc_sensor[14].desc, "Aux Fan"); 389 } 390 #undef COPYDESCR 391 392 static void 393 itesio_refresh_temp(struct itesio_softc *sc, envsys_data_t *edata) 394 { 395 int sdata; 396 397 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORTEMPBASE + edata->sensor); 398 /* sensor is not connected or reporting invalid data */ 399 if (sdata == 0 || sdata >= 0xfa) { 400 edata->state = ENVSYS_SINVALID; 401 return; 402 } 403 404 DPRINTF(("%s: sdata[temp%d] 0x%x\n", __func__, edata->sensor, sdata)); 405 /* Convert temperature to uK */ 406 edata->value_cur = sdata * 1000000 + 273150000; 407 edata->state = ENVSYS_SVALID; 408 } 409 410 static void 411 itesio_refresh_volts(struct itesio_softc *sc, envsys_data_t *edata) 412 { 413 uint8_t vbatcr = 0; 414 int i, sdata; 415 416 i = edata->sensor - IT_VOLTSTART_IDX; 417 418 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORVOLTBASE + i); 419 /* not connected */ 420 if (sdata == 0 || sdata == 0xff) { 421 edata->state = ENVSYS_SINVALID; 422 return; 423 } 424 425 /* 426 * update VBAT voltage reading every time we read it, to get 427 * latest value. 428 */ 429 if (i == 8) { 430 vbatcr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 431 SET(vbatcr, ITESIO_EC_UPDATEVBAT); 432 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, vbatcr); 433 } 434 435 DPRINTF(("%s: sdata[volt%d] 0x%x\n", __func__, i, sdata)); 436 437 /* voltage returned as (mV << 4) */ 438 edata->value_cur = (sdata << 4); 439 /* rfact is (factor * 10^4) */ 440 edata->value_cur *= itesio_vrfact[i]; 441 442 if (edata->rfact) 443 edata->value_cur += edata->rfact; 444 else 445 edata->rfact = itesio_vrfact[i]; 446 447 /* division by 10 gets us back to uVDC */ 448 edata->value_cur /= 10; 449 edata->state = ENVSYS_SVALID; 450 } 451 452 static void 453 itesio_refresh_fans(struct itesio_softc *sc, envsys_data_t *edata) 454 { 455 uint8_t mode = 0; 456 uint16_t sdata = 0; 457 int i, divisor, odivisor, ndivisor; 458 459 i = edata->sensor - IT_FANSTART_IDX; 460 divisor = odivisor = ndivisor = 0; 461 462 if (sc->sc_chipid == ITESIO_ID8705 || sc->sc_chipid == ITESIO_ID8712) { 463 /* 464 * Use the Fan Tachometer Divisor Register for 465 * IT8705F and IT8712F. 466 */ 467 divisor = odivisor = ndivisor = 468 itesio_ecreadreg(sc, ITESIO_EC_FAN_TDR); 469 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 470 if (sdata == 0xff) { 471 edata->state = ENVSYS_SINVALID; 472 if (i == 2) 473 ndivisor |= 0x40; 474 else { 475 ndivisor &= ~(7 << (i * 3)); 476 ndivisor |= ((divisor + 1) & 7) << (i * 3); 477 } 478 } else { 479 if (i == 2) 480 divisor = divisor & 1 ? 3 : 1; 481 482 if ((sdata << (divisor & 7)) == 0) 483 edata->state = ENVSYS_SINVALID; 484 else { 485 edata->value_cur = 486 1350000 / (sdata << (divisor & 7)); 487 edata->state = ENVSYS_SVALID; 488 } 489 } 490 DPRINTF(("%s: 8bit sdata[fan%d] 0x%x div: 0x%x\n", __func__, 491 i, sdata, divisor)); 492 if (ndivisor != odivisor) 493 itesio_ecwritereg(sc, ITESIO_EC_FAN_TDR, ndivisor); 494 } else { 495 mode = itesio_ecreadreg(sc, ITESIO_EC_FAN16_CER); 496 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 497 if (mode & (1 << i)) 498 sdata += (itesio_ecreadreg(sc, 499 ITESIO_EC_SENSORFANEXTBASE + i) << 8); 500 edata->state = ENVSYS_SVALID; 501 if (sdata == 0 || 502 sdata == ((mode & (1 << i)) ? 0xffff : 0xff)) 503 edata->state = ENVSYS_SINVALID; 504 else { 505 edata->value_cur = 1350000 / 2 / sdata; 506 edata->state = ENVSYS_SVALID; 507 } 508 DPRINTF(("%s: 16bit sdata[fan%d] 0x%x\n", __func__, i, sdata)); 509 } 510 } 511 512 static void 513 itesio_refresh(struct sysmon_envsys *sme, struct envsys_data *edata) 514 { 515 struct itesio_softc *sc = sme->sme_cookie; 516 517 if (edata->sensor < IT_VOLTSTART_IDX) 518 itesio_refresh_temp(sc, edata); 519 else if (edata->sensor >= IT_VOLTSTART_IDX && 520 edata->sensor < IT_FANSTART_IDX) 521 itesio_refresh_volts(sc, edata); 522 else 523 itesio_refresh_fans(sc, edata); 524 } 525 526 static int 527 itesio_wdt_setmode(struct sysmon_wdog *smw) 528 { 529 struct itesio_softc *sc = smw->smw_cookie; 530 int period = smw->smw_period; 531 532 /* Enter MB PNP mode and select the WDT LDN */ 533 itesio_enter(sc->sc_iot, sc->sc_ioh); 534 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_LDNSEL, ITESIO_WDT_LDN); 535 536 if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 537 /* Disable the watchdog */ 538 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_CTL, 0); 539 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_CNF, 0); 540 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_MSB, 0); 541 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_LSB, 0); 542 } else { 543 /* Enable the watchdog */ 544 if (period > ITESIO_WDT_MAXTIMO || period < 1) 545 period = smw->smw_period = ITESIO_WDT_MAXTIMO; 546 547 period *= 2; 548 549 /* set the timeout and start the watchdog */ 550 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_MSB, 551 period >> 8); 552 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_LSB, 553 period & 0xff); 554 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_CNF, 555 ITESIO_WDT_CNF_SECS | ITESIO_WDT_CNF_KRST | 556 ITESIO_WDT_CNF_PWROK); 557 } 558 /* we are done, exit MB PNP mode */ 559 itesio_exit(sc->sc_iot, sc->sc_ioh); 560 561 return 0; 562 } 563 564 static int 565 itesio_wdt_tickle(struct sysmon_wdog *smw) 566 { 567 struct itesio_softc *sc = smw->smw_cookie; 568 int period = smw->smw_period * 2; 569 570 /* refresh timeout value and exit */ 571 itesio_enter(sc->sc_iot, sc->sc_ioh); 572 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_LDNSEL, ITESIO_WDT_LDN); 573 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_MSB, 574 period >> 8); 575 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_LSB, 576 period & 0xff); 577 itesio_exit(sc->sc_iot, sc->sc_ioh); 578 579 return 0; 580 } 581
Indexes created Tue Sep 30 20:09:53 GMT 2025