itesio_isa.c revision 1.26
1 /* $NetBSD: itesio_isa.c,v 1.26 2017/08/14 11:49:30 hauke 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 1.26 2017/08/14 11:49:30 hauke Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/kernel.h> 41 #include <sys/device.h> 42 #include <sys/module.h> 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_ID8628: 140 case ITESIO_ID8705: 141 case ITESIO_ID8712: 142 case ITESIO_ID8716: 143 case ITESIO_ID8718: 144 case ITESIO_ID8720: 145 case ITESIO_ID8721: 146 case ITESIO_ID8726: 147 ia->ia_nio = 1; 148 ia->ia_io[0].ir_size = 2; 149 ia->ia_niomem = 0; 150 ia->ia_nirq = 0; 151 ia->ia_ndrq = 0; 152 return 1; 153 default: 154 return 0; 155 } 156 } 157 158 static void 159 itesio_isa_attach(device_t parent, device_t self, void *aux) 160 { 161 struct itesio_softc *sc = device_private(self); 162 struct isa_attach_args *ia = aux; 163 int i; 164 uint8_t cr; 165 166 sc->sc_iot = ia->ia_iot; 167 168 if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 2, 0, 169 &sc->sc_pnp_ioh)) { 170 aprint_error(": can't map pnp i/o space\n"); 171 return; 172 } 173 174 aprint_naive("\n"); 175 176 /* 177 * Enter to the Super I/O MB PNP mode. 178 */ 179 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 180 /* 181 * Get info from the Super I/O Global Configuration Registers: 182 * Chip IDs and Device Revision. 183 */ 184 sc->sc_chipid = (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 185 ITESIO_CHIPID1) << 8); 186 sc->sc_chipid |= itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 187 ITESIO_CHIPID2); 188 sc->sc_devrev = (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 189 ITESIO_DEVREV) & 0x0f); 190 /* 191 * Select the EC LDN to get the Base Address. 192 */ 193 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 194 ITESIO_EC_LDN); 195 sc->sc_hwmon_baseaddr = 196 (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_EC_MSB) << 8); 197 sc->sc_hwmon_baseaddr |= itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 198 ITESIO_EC_LSB); 199 /* 200 * We are done, exit MB PNP mode. 201 */ 202 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 203 204 aprint_normal(": iTE IT%4xF Super I/O (rev %d)\n", 205 sc->sc_chipid, sc->sc_devrev); 206 aprint_normal_dev(self, "Hardware Monitor registers at 0x%x\n", 207 sc->sc_hwmon_baseaddr); 208 209 if (bus_space_map(sc->sc_iot, sc->sc_hwmon_baseaddr, 8, 0, 210 &sc->sc_ec_ioh)) { 211 aprint_error_dev(self, "cannot map hwmon i/o space\n"); 212 goto out2; 213 } 214 215 sc->sc_hwmon_mapped = true; 216 217 /* Activate monitoring */ 218 cr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 219 SET(cr, 0x01); 220 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, cr); 221 222 #ifdef notyet 223 /* Enable beep alarms */ 224 cr = itesio_ecreadreg(sc, ITESIO_EC_BEEPEER); 225 SET(cr, 0x02); /* Voltage exceeds limit */ 226 SET(cr, 0x04); /* Temperature exceeds limit */ 227 itesio_ecwritereg(sc, ITESIO_EC_BEEPEER, cr); 228 #endif 229 230 /* 231 * Initialize and attach sensors. 232 */ 233 itesio_setup_sensors(sc); 234 sc->sc_sme = sysmon_envsys_create(); 235 for (i = 0; i < IT_NUM_SENSORS; i++) { 236 if (sysmon_envsys_sensor_attach(sc->sc_sme, 237 &sc->sc_sensor[i])) { 238 sysmon_envsys_destroy(sc->sc_sme); 239 goto out; 240 } 241 } 242 /* 243 * Hook into the system monitor. 244 */ 245 sc->sc_sme->sme_name = device_xname(self); 246 sc->sc_sme->sme_cookie = sc; 247 sc->sc_sme->sme_refresh = itesio_refresh; 248 249 if ((i = sysmon_envsys_register(sc->sc_sme))) { 250 aprint_error_dev(self, 251 "unable to register with sysmon (%d)\n", i); 252 sysmon_envsys_destroy(sc->sc_sme); 253 goto out; 254 } 255 sc->sc_hwmon_enabled = true; 256 257 if (!pmf_device_register(self, NULL, NULL)) 258 aprint_error_dev(self, "couldn't establish power handler\n"); 259 260 /* The IT8705 doesn't support the WDT */ 261 if (sc->sc_chipid == ITESIO_ID8705) 262 goto out2; 263 264 /* 265 * Initialize the watchdog timer. 266 */ 267 sc->sc_smw.smw_name = device_xname(self); 268 sc->sc_smw.smw_cookie = sc; 269 sc->sc_smw.smw_setmode = itesio_wdt_setmode; 270 sc->sc_smw.smw_tickle = itesio_wdt_tickle; 271 sc->sc_smw.smw_period = 60; 272 273 if (sysmon_wdog_register(&sc->sc_smw)) { 274 aprint_error_dev(self, "unable to register watchdog timer\n"); 275 goto out2; 276 } 277 sc->sc_wdt_enabled = true; 278 aprint_normal_dev(self, "Watchdog Timer present\n"); 279 280 pmf_device_deregister(self); 281 if (!pmf_device_register(self, itesio_wdt_suspend, NULL)) 282 aprint_error_dev(self, "couldn't establish power handler\n"); 283 284 return; 285 286 out: 287 bus_space_unmap(sc->sc_iot, sc->sc_ec_ioh, 8); 288 out2: 289 bus_space_unmap(sc->sc_iot, sc->sc_pnp_ioh, 2); 290 } 291 292 static int 293 itesio_isa_detach(device_t self, int flags) 294 { 295 struct itesio_softc *sc = device_private(self); 296 297 if (sc->sc_hwmon_enabled) 298 sysmon_envsys_unregister(sc->sc_sme); 299 if (sc->sc_hwmon_mapped) 300 bus_space_unmap(sc->sc_iot, sc->sc_ec_ioh, 8); 301 if (sc->sc_wdt_enabled) { 302 sysmon_wdog_unregister(&sc->sc_smw); 303 bus_space_unmap(sc->sc_iot, sc->sc_pnp_ioh, 2); 304 } 305 306 return 0; 307 } 308 309 static bool 310 itesio_wdt_suspend(device_t dev, const pmf_qual_t *qual) 311 { 312 struct itesio_softc *sc = device_private(dev); 313 314 /* Don't allow suspend if watchdog is armed */ 315 if ((sc->sc_smw.smw_mode & WDOG_MODE_MASK) != WDOG_MODE_DISARMED) 316 return false; 317 return true; 318 } 319 320 /* 321 * Functions to read/write to the Environmental Controller. 322 */ 323 static uint8_t 324 itesio_ecreadreg(struct itesio_softc *sc, int reg) 325 { 326 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 327 return bus_space_read_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_DATA); 328 } 329 330 static void 331 itesio_ecwritereg(struct itesio_softc *sc, int reg, int val) 332 { 333 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 334 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_DATA, val); 335 } 336 337 /* 338 * Functions to enter/exit/read/write to the Super I/O. 339 */ 340 static uint8_t 341 itesio_readreg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg) 342 { 343 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 344 return bus_space_read_1(iot, ioh, ITESIO_DATA); 345 } 346 347 static void 348 itesio_writereg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, int val) 349 { 350 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 351 bus_space_write_1(iot, ioh, ITESIO_DATA, val); 352 } 353 354 static void 355 itesio_enter(bus_space_tag_t iot, bus_space_handle_t ioh) 356 { 357 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x87); 358 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x01); 359 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 360 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 361 } 362 363 static void 364 itesio_exit(bus_space_tag_t iot, bus_space_handle_t ioh) 365 { 366 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x02); 367 bus_space_write_1(iot, ioh, ITESIO_DATA, 0x02); 368 } 369 370 371 #define COPYDESCR(x, y) \ 372 do { \ 373 strlcpy((x), (y), sizeof(x)); \ 374 } while (0) 375 /* 376 * sysmon_envsys(9) glue. 377 */ 378 static void 379 itesio_setup_sensors(struct itesio_softc *sc) 380 { 381 int i; 382 383 /* temperatures */ 384 for (i = 0; i < IT_VOLTSTART_IDX; i++) 385 sc->sc_sensor[i].units = ENVSYS_STEMP; 386 387 COPYDESCR(sc->sc_sensor[0].desc, "CPU Temp"); 388 COPYDESCR(sc->sc_sensor[1].desc, "System Temp"); 389 COPYDESCR(sc->sc_sensor[2].desc, "Aux Temp"); 390 391 /* voltages */ 392 for (i = IT_VOLTSTART_IDX; i < IT_FANSTART_IDX; i++) { 393 sc->sc_sensor[i].units = ENVSYS_SVOLTS_DC; 394 sc->sc_sensor[i].flags = ENVSYS_FCHANGERFACT; 395 } 396 397 COPYDESCR(sc->sc_sensor[3].desc, "VCORE_A"); 398 COPYDESCR(sc->sc_sensor[4].desc, "VCORE_B"); 399 COPYDESCR(sc->sc_sensor[5].desc, "+3.3V"); 400 COPYDESCR(sc->sc_sensor[6].desc, "+5V"); 401 COPYDESCR(sc->sc_sensor[7].desc, "+12V"); 402 COPYDESCR(sc->sc_sensor[8].desc, "-5V"); 403 COPYDESCR(sc->sc_sensor[9].desc, "-12V"); 404 COPYDESCR(sc->sc_sensor[10].desc, "STANDBY"); 405 COPYDESCR(sc->sc_sensor[11].desc, "VBAT"); 406 407 /* fans */ 408 for (i = IT_FANSTART_IDX; i < IT_NUM_SENSORS; i++) 409 sc->sc_sensor[i].units = ENVSYS_SFANRPM; 410 411 COPYDESCR(sc->sc_sensor[12].desc, "CPU Fan"); 412 COPYDESCR(sc->sc_sensor[13].desc, "System Fan"); 413 COPYDESCR(sc->sc_sensor[14].desc, "Aux Fan"); 414 415 /* all */ 416 for (i = 0; i < IT_NUM_SENSORS; i++) 417 sc->sc_sensor[i].state = ENVSYS_SINVALID; 418 } 419 #undef COPYDESCR 420 421 static void 422 itesio_refresh_temp(struct itesio_softc *sc, envsys_data_t *edata) 423 { 424 int sdata; 425 426 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORTEMPBASE + edata->sensor); 427 /* sensor is not connected or reporting invalid data */ 428 if (sdata == 0 || sdata >= 0xfa) { 429 edata->state = ENVSYS_SINVALID; 430 return; 431 } 432 433 DPRINTF(("%s: sdata[temp%d] 0x%x\n", __func__, edata->sensor, sdata)); 434 /* Convert temperature to uK */ 435 edata->value_cur = sdata * 1000000 + 273150000; 436 edata->state = ENVSYS_SVALID; 437 } 438 439 static void 440 itesio_refresh_volts(struct itesio_softc *sc, envsys_data_t *edata) 441 { 442 uint8_t vbatcr = 0; 443 int i, sdata; 444 445 i = edata->sensor - IT_VOLTSTART_IDX; 446 447 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORVOLTBASE + i); 448 /* not connected */ 449 if (sdata == 0 || sdata == 0xff) { 450 edata->state = ENVSYS_SINVALID; 451 return; 452 } 453 454 /* 455 * update VBAT voltage reading every time we read it, to get 456 * latest value. 457 */ 458 if (i == 8) { 459 vbatcr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 460 SET(vbatcr, ITESIO_EC_UPDATEVBAT); 461 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, vbatcr); 462 } 463 464 DPRINTF(("%s: sdata[volt%d] 0x%x\n", __func__, i, sdata)); 465 466 /* voltage returned as (mV << 4) */ 467 edata->value_cur = (sdata << 4); 468 /* negative values */ 469 if (i == 5 || i == 6) 470 edata->value_cur -= ITESIO_EC_VREF; 471 /* rfact is (factor * 10^4) */ 472 if (edata->rfact) 473 edata->value_cur *= edata->rfact; 474 else 475 edata->value_cur *= itesio_vrfact[i]; 476 /* division by 10 gets us back to uVDC */ 477 edata->value_cur /= 10; 478 if (i == 5 || i == 6) 479 edata->value_cur += ITESIO_EC_VREF * 1000; 480 481 edata->state = ENVSYS_SVALID; 482 } 483 484 static void 485 itesio_refresh_fans(struct itesio_softc *sc, envsys_data_t *edata) 486 { 487 uint8_t mode = 0; 488 uint16_t sdata = 0; 489 int i, divisor, odivisor, ndivisor; 490 491 i = edata->sensor - IT_FANSTART_IDX; 492 divisor = odivisor = ndivisor = 0; 493 494 if (sc->sc_chipid == ITESIO_ID8705 || sc->sc_chipid == ITESIO_ID8712) { 495 /* 496 * Use the Fan Tachometer Divisor Register for 497 * IT8705F and IT8712F. 498 */ 499 divisor = odivisor = ndivisor = 500 itesio_ecreadreg(sc, ITESIO_EC_FAN_TDR); 501 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 502 if (sdata == 0xff) { 503 edata->state = ENVSYS_SINVALID; 504 if (i == 2) 505 ndivisor |= 0x40; 506 else { 507 ndivisor &= ~(7 << (i * 3)); 508 ndivisor |= ((divisor + 1) & 7) << (i * 3); 509 } 510 } else { 511 if (i == 2) 512 divisor = divisor & 1 ? 3 : 1; 513 514 if ((sdata << (divisor & 7)) == 0) 515 edata->state = ENVSYS_SINVALID; 516 else { 517 edata->value_cur = 518 1350000 / (sdata << (divisor & 7)); 519 edata->state = ENVSYS_SVALID; 520 } 521 } 522 DPRINTF(("%s: 8bit sdata[fan%d] 0x%x div: 0x%x\n", __func__, 523 i, sdata, divisor)); 524 if (ndivisor != odivisor) 525 itesio_ecwritereg(sc, ITESIO_EC_FAN_TDR, ndivisor); 526 } else { 527 mode = itesio_ecreadreg(sc, ITESIO_EC_FAN16_CER); 528 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 529 if (mode & (1 << i)) 530 sdata += (itesio_ecreadreg(sc, 531 ITESIO_EC_SENSORFANEXTBASE + i) << 8); 532 edata->state = ENVSYS_SVALID; 533 if (sdata == 0 || 534 sdata == ((mode & (1 << i)) ? 0xffff : 0xff)) 535 edata->state = ENVSYS_SINVALID; 536 else { 537 edata->value_cur = 1350000 / 2 / sdata; 538 edata->state = ENVSYS_SVALID; 539 } 540 DPRINTF(("%s: 16bit sdata[fan%d] 0x%x\n", __func__, i, sdata)); 541 } 542 } 543 544 static void 545 itesio_refresh(struct sysmon_envsys *sme, struct envsys_data *edata) 546 { 547 struct itesio_softc *sc = sme->sme_cookie; 548 549 if (edata->sensor < IT_VOLTSTART_IDX) 550 itesio_refresh_temp(sc, edata); 551 else if (edata->sensor >= IT_VOLTSTART_IDX && 552 edata->sensor < IT_FANSTART_IDX) 553 itesio_refresh_volts(sc, edata); 554 else 555 itesio_refresh_fans(sc, edata); 556 } 557 558 static int 559 itesio_wdt_setmode(struct sysmon_wdog *smw) 560 { 561 struct itesio_softc *sc = smw->smw_cookie; 562 int period = smw->smw_period; 563 564 /* Enter MB PNP mode and select the WDT LDN */ 565 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 566 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 567 ITESIO_WDT_LDN); 568 569 if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 570 /* Disable the watchdog */ 571 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CTL, 0); 572 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CNF, 0); 573 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 0); 574 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 0); 575 } else { 576 /* Enable the watchdog */ 577 if (period > ITESIO_WDT_MAXTIMO || period < 1) 578 period = smw->smw_period = ITESIO_WDT_MAXTIMO; 579 580 period *= 2; 581 582 /* set the timeout and start the watchdog */ 583 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 584 period >> 8); 585 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 586 period & 0xff); 587 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CNF, 588 ITESIO_WDT_CNF_SECS | ITESIO_WDT_CNF_KRST | 589 ITESIO_WDT_CNF_PWROK); 590 } 591 /* we are done, exit MB PNP mode */ 592 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 593 594 return 0; 595 } 596 597 static int 598 itesio_wdt_tickle(struct sysmon_wdog *smw) 599 { 600 struct itesio_softc *sc = smw->smw_cookie; 601 int period = smw->smw_period * 2; 602 603 /* refresh timeout value and exit */ 604 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 605 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 606 ITESIO_WDT_LDN); 607 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 608 period >> 8); 609 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 610 period & 0xff); 611 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 612 613 return 0; 614 } 615 616 MODULE(MODULE_CLASS_DRIVER, itesio, "sysmon_envsys,sysmon_wdog"); 617 618 #ifdef _MODULE 619 #include "ioconf.c" 620 #endif 621 622 static int 623 itesio_modcmd(modcmd_t cmd, void *opaque) 624 { 625 switch (cmd) { 626 case MODULE_CMD_INIT: 627 #ifdef _MODULE 628 return config_init_component(cfdriver_ioconf_itesio, 629 cfattach_ioconf_itesio, cfdata_ioconf_itesio); 630 #else 631 return 0; 632 #endif 633 case MODULE_CMD_FINI: 634 #ifdef _MODULE 635 return config_fini_component(cfdriver_ioconf_itesio, 636 cfattach_ioconf_itesio, cfdata_ioconf_itesio); 637 #else 638 return 0; 639 #endif 640 default: 641 return ENOTTY; 642 } 643 } 644
Indexes created Wed Oct 15 16:09:53 GMT 2025