itesio_isa.c revision 1.24
1 /* $NetBSD: itesio_isa.c,v 1.24 2012/11/15 04:45:01 msaitoh 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 1.24 2012/11/15 04:45:01 msaitoh 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_ID8705: 140 case ITESIO_ID8712: 141 case ITESIO_ID8716: 142 case ITESIO_ID8718: 143 case ITESIO_ID8720: 144 case ITESIO_ID8721: 145 case ITESIO_ID8726: 146 ia->ia_nio = 1; 147 ia->ia_io[0].ir_size = 2; 148 ia->ia_niomem = 0; 149 ia->ia_nirq = 0; 150 ia->ia_ndrq = 0; 151 return 1; 152 default: 153 return 0; 154 } 155 } 156 157 static void 158 itesio_isa_attach(device_t parent, device_t self, void *aux) 159 { 160 struct itesio_softc *sc = device_private(self); 161 struct isa_attach_args *ia = aux; 162 int i; 163 uint8_t cr; 164 165 sc->sc_iot = ia->ia_iot; 166 167 if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 2, 0, 168 &sc->sc_pnp_ioh)) { 169 aprint_error(": can't map pnp i/o space\n"); 170 return; 171 } 172 173 aprint_naive("\n"); 174 175 /* 176 * Enter to the Super I/O MB PNP mode. 177 */ 178 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 179 /* 180 * Get info from the Super I/O Global Configuration Registers: 181 * Chip IDs and Device Revision. 182 */ 183 sc->sc_chipid = (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 184 ITESIO_CHIPID1) << 8); 185 sc->sc_chipid |= itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 186 ITESIO_CHIPID2); 187 sc->sc_devrev = (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 188 ITESIO_DEVREV) & 0x0f); 189 /* 190 * Select the EC LDN to get the Base Address. 191 */ 192 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 193 ITESIO_EC_LDN); 194 sc->sc_hwmon_baseaddr = 195 (itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_EC_MSB) << 8); 196 sc->sc_hwmon_baseaddr |= itesio_readreg(sc->sc_iot, sc->sc_pnp_ioh, 197 ITESIO_EC_LSB); 198 /* 199 * We are done, exit MB PNP mode. 200 */ 201 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 202 203 aprint_normal(": iTE IT%4xF Super I/O (rev %d)\n", 204 sc->sc_chipid, sc->sc_devrev); 205 aprint_normal_dev(self, "Hardware Monitor registers at 0x%x\n", 206 sc->sc_hwmon_baseaddr); 207 208 if (bus_space_map(sc->sc_iot, sc->sc_hwmon_baseaddr, 8, 0, 209 &sc->sc_ec_ioh)) { 210 aprint_error_dev(self, "cannot map hwmon i/o space\n"); 211 goto out2; 212 } 213 214 sc->sc_hwmon_mapped = true; 215 216 /* Activate monitoring */ 217 cr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 218 SET(cr, 0x01); 219 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, cr); 220 221 #ifdef notyet 222 /* Enable beep alarms */ 223 cr = itesio_ecreadreg(sc, ITESIO_EC_BEEPEER); 224 SET(cr, 0x02); /* Voltage exceeds limit */ 225 SET(cr, 0x04); /* Temperature exceeds limit */ 226 itesio_ecwritereg(sc, ITESIO_EC_BEEPEER, cr); 227 #endif 228 229 /* 230 * Initialize and attach sensors. 231 */ 232 itesio_setup_sensors(sc); 233 sc->sc_sme = sysmon_envsys_create(); 234 for (i = 0; i < IT_NUM_SENSORS; i++) { 235 if (sysmon_envsys_sensor_attach(sc->sc_sme, 236 &sc->sc_sensor[i])) { 237 sysmon_envsys_destroy(sc->sc_sme); 238 goto out; 239 } 240 } 241 /* 242 * Hook into the system monitor. 243 */ 244 sc->sc_sme->sme_name = device_xname(self); 245 sc->sc_sme->sme_cookie = sc; 246 sc->sc_sme->sme_refresh = itesio_refresh; 247 248 if ((i = sysmon_envsys_register(sc->sc_sme))) { 249 aprint_error_dev(self, 250 "unable to register with sysmon (%d)\n", i); 251 sysmon_envsys_destroy(sc->sc_sme); 252 goto out; 253 } 254 sc->sc_hwmon_enabled = true; 255 256 if (!pmf_device_register(self, NULL, NULL)) 257 aprint_error_dev(self, "couldn't establish power handler\n"); 258 259 /* The IT8705 doesn't support the WDT */ 260 if (sc->sc_chipid == ITESIO_ID8705) 261 goto out2; 262 263 /* 264 * Initialize the watchdog timer. 265 */ 266 sc->sc_smw.smw_name = device_xname(self); 267 sc->sc_smw.smw_cookie = sc; 268 sc->sc_smw.smw_setmode = itesio_wdt_setmode; 269 sc->sc_smw.smw_tickle = itesio_wdt_tickle; 270 sc->sc_smw.smw_period = 60; 271 272 if (sysmon_wdog_register(&sc->sc_smw)) { 273 aprint_error_dev(self, "unable to register watchdog timer\n"); 274 goto out2; 275 } 276 sc->sc_wdt_enabled = true; 277 aprint_normal_dev(self, "Watchdog Timer present\n"); 278 279 pmf_device_deregister(self); 280 if (!pmf_device_register(self, itesio_wdt_suspend, NULL)) 281 aprint_error_dev(self, "couldn't establish power handler\n"); 282 283 return; 284 285 out: 286 bus_space_unmap(sc->sc_iot, sc->sc_ec_ioh, 8); 287 out2: 288 bus_space_unmap(sc->sc_iot, sc->sc_pnp_ioh, 2); 289 } 290 291 static int 292 itesio_isa_detach(device_t self, int flags) 293 { 294 struct itesio_softc *sc = device_private(self); 295 296 if (sc->sc_hwmon_enabled) 297 sysmon_envsys_unregister(sc->sc_sme); 298 if (sc->sc_hwmon_mapped) 299 bus_space_unmap(sc->sc_iot, sc->sc_ec_ioh, 8); 300 if (sc->sc_wdt_enabled) { 301 sysmon_wdog_unregister(&sc->sc_smw); 302 bus_space_unmap(sc->sc_iot, sc->sc_pnp_ioh, 2); 303 } 304 305 return 0; 306 } 307 308 static bool 309 itesio_wdt_suspend(device_t dev, const pmf_qual_t *qual) 310 { 311 struct itesio_softc *sc = device_private(dev); 312 313 /* Don't allow suspend if watchdog is armed */ 314 if ((sc->sc_smw.smw_mode & WDOG_MODE_MASK) != WDOG_MODE_DISARMED) 315 return false; 316 return true; 317 } 318 319 /* 320 * Functions to read/write to the Environmental Controller. 321 */ 322 static uint8_t 323 itesio_ecreadreg(struct itesio_softc *sc, int reg) 324 { 325 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 326 return bus_space_read_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_DATA); 327 } 328 329 static void 330 itesio_ecwritereg(struct itesio_softc *sc, int reg, int val) 331 { 332 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg); 333 bus_space_write_1(sc->sc_iot, sc->sc_ec_ioh, ITESIO_EC_DATA, val); 334 } 335 336 /* 337 * Functions to enter/exit/read/write to the Super I/O. 338 */ 339 static uint8_t 340 itesio_readreg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg) 341 { 342 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 343 return bus_space_read_1(iot, ioh, ITESIO_DATA); 344 } 345 346 static void 347 itesio_writereg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, int val) 348 { 349 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg); 350 bus_space_write_1(iot, ioh, ITESIO_DATA, val); 351 } 352 353 static void 354 itesio_enter(bus_space_tag_t iot, bus_space_handle_t ioh) 355 { 356 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x87); 357 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x01); 358 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 359 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55); 360 } 361 362 static void 363 itesio_exit(bus_space_tag_t iot, bus_space_handle_t ioh) 364 { 365 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x02); 366 bus_space_write_1(iot, ioh, ITESIO_DATA, 0x02); 367 } 368 369 370 #define COPYDESCR(x, y) \ 371 do { \ 372 strlcpy((x), (y), sizeof(x)); \ 373 } while (0) 374 /* 375 * sysmon_envsys(9) glue. 376 */ 377 static void 378 itesio_setup_sensors(struct itesio_softc *sc) 379 { 380 int i; 381 382 /* temperatures */ 383 for (i = 0; i < IT_VOLTSTART_IDX; i++) 384 sc->sc_sensor[i].units = ENVSYS_STEMP; 385 386 COPYDESCR(sc->sc_sensor[0].desc, "CPU Temp"); 387 COPYDESCR(sc->sc_sensor[1].desc, "System Temp"); 388 COPYDESCR(sc->sc_sensor[2].desc, "Aux Temp"); 389 390 /* voltages */ 391 for (i = IT_VOLTSTART_IDX; i < IT_FANSTART_IDX; i++) { 392 sc->sc_sensor[i].units = ENVSYS_SVOLTS_DC; 393 sc->sc_sensor[i].flags = ENVSYS_FCHANGERFACT; 394 } 395 396 COPYDESCR(sc->sc_sensor[3].desc, "VCORE_A"); 397 COPYDESCR(sc->sc_sensor[4].desc, "VCORE_B"); 398 COPYDESCR(sc->sc_sensor[5].desc, "+3.3V"); 399 COPYDESCR(sc->sc_sensor[6].desc, "+5V"); 400 COPYDESCR(sc->sc_sensor[7].desc, "+12V"); 401 COPYDESCR(sc->sc_sensor[8].desc, "-5V"); 402 COPYDESCR(sc->sc_sensor[9].desc, "-12V"); 403 COPYDESCR(sc->sc_sensor[10].desc, "STANDBY"); 404 COPYDESCR(sc->sc_sensor[11].desc, "VBAT"); 405 406 /* fans */ 407 for (i = IT_FANSTART_IDX; i < IT_NUM_SENSORS; i++) 408 sc->sc_sensor[i].units = ENVSYS_SFANRPM; 409 410 COPYDESCR(sc->sc_sensor[12].desc, "CPU Fan"); 411 COPYDESCR(sc->sc_sensor[13].desc, "System Fan"); 412 COPYDESCR(sc->sc_sensor[14].desc, "Aux Fan"); 413 414 /* all */ 415 for (i = 0; i < IT_NUM_SENSORS; i++) 416 sc->sc_sensor[i].state = ENVSYS_SINVALID; 417 } 418 #undef COPYDESCR 419 420 static void 421 itesio_refresh_temp(struct itesio_softc *sc, envsys_data_t *edata) 422 { 423 int sdata; 424 425 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORTEMPBASE + edata->sensor); 426 /* sensor is not connected or reporting invalid data */ 427 if (sdata == 0 || sdata >= 0xfa) { 428 edata->state = ENVSYS_SINVALID; 429 return; 430 } 431 432 DPRINTF(("%s: sdata[temp%d] 0x%x\n", __func__, edata->sensor, sdata)); 433 /* Convert temperature to uK */ 434 edata->value_cur = sdata * 1000000 + 273150000; 435 edata->state = ENVSYS_SVALID; 436 } 437 438 static void 439 itesio_refresh_volts(struct itesio_softc *sc, envsys_data_t *edata) 440 { 441 uint8_t vbatcr = 0; 442 int i, sdata; 443 444 i = edata->sensor - IT_VOLTSTART_IDX; 445 446 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORVOLTBASE + i); 447 /* not connected */ 448 if (sdata == 0 || sdata == 0xff) { 449 edata->state = ENVSYS_SINVALID; 450 return; 451 } 452 453 /* 454 * update VBAT voltage reading every time we read it, to get 455 * latest value. 456 */ 457 if (i == 8) { 458 vbatcr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG); 459 SET(vbatcr, ITESIO_EC_UPDATEVBAT); 460 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, vbatcr); 461 } 462 463 DPRINTF(("%s: sdata[volt%d] 0x%x\n", __func__, i, sdata)); 464 465 /* voltage returned as (mV << 4) */ 466 edata->value_cur = (sdata << 4); 467 /* negative values */ 468 if (i == 5 || i == 6) 469 edata->value_cur -= ITESIO_EC_VREF; 470 /* rfact is (factor * 10^4) */ 471 if (edata->rfact) 472 edata->value_cur *= edata->rfact; 473 else 474 edata->value_cur *= itesio_vrfact[i]; 475 /* division by 10 gets us back to uVDC */ 476 edata->value_cur /= 10; 477 if (i == 5 || i == 6) 478 edata->value_cur += ITESIO_EC_VREF * 1000; 479 480 edata->state = ENVSYS_SVALID; 481 } 482 483 static void 484 itesio_refresh_fans(struct itesio_softc *sc, envsys_data_t *edata) 485 { 486 uint8_t mode = 0; 487 uint16_t sdata = 0; 488 int i, divisor, odivisor, ndivisor; 489 490 i = edata->sensor - IT_FANSTART_IDX; 491 divisor = odivisor = ndivisor = 0; 492 493 if (sc->sc_chipid == ITESIO_ID8705 || sc->sc_chipid == ITESIO_ID8712) { 494 /* 495 * Use the Fan Tachometer Divisor Register for 496 * IT8705F and IT8712F. 497 */ 498 divisor = odivisor = ndivisor = 499 itesio_ecreadreg(sc, ITESIO_EC_FAN_TDR); 500 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 501 if (sdata == 0xff) { 502 edata->state = ENVSYS_SINVALID; 503 if (i == 2) 504 ndivisor |= 0x40; 505 else { 506 ndivisor &= ~(7 << (i * 3)); 507 ndivisor |= ((divisor + 1) & 7) << (i * 3); 508 } 509 } else { 510 if (i == 2) 511 divisor = divisor & 1 ? 3 : 1; 512 513 if ((sdata << (divisor & 7)) == 0) 514 edata->state = ENVSYS_SINVALID; 515 else { 516 edata->value_cur = 517 1350000 / (sdata << (divisor & 7)); 518 edata->state = ENVSYS_SVALID; 519 } 520 } 521 DPRINTF(("%s: 8bit sdata[fan%d] 0x%x div: 0x%x\n", __func__, 522 i, sdata, divisor)); 523 if (ndivisor != odivisor) 524 itesio_ecwritereg(sc, ITESIO_EC_FAN_TDR, ndivisor); 525 } else { 526 mode = itesio_ecreadreg(sc, ITESIO_EC_FAN16_CER); 527 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i); 528 if (mode & (1 << i)) 529 sdata += (itesio_ecreadreg(sc, 530 ITESIO_EC_SENSORFANEXTBASE + i) << 8); 531 edata->state = ENVSYS_SVALID; 532 if (sdata == 0 || 533 sdata == ((mode & (1 << i)) ? 0xffff : 0xff)) 534 edata->state = ENVSYS_SINVALID; 535 else { 536 edata->value_cur = 1350000 / 2 / sdata; 537 edata->state = ENVSYS_SVALID; 538 } 539 DPRINTF(("%s: 16bit sdata[fan%d] 0x%x\n", __func__, i, sdata)); 540 } 541 } 542 543 static void 544 itesio_refresh(struct sysmon_envsys *sme, struct envsys_data *edata) 545 { 546 struct itesio_softc *sc = sme->sme_cookie; 547 548 if (edata->sensor < IT_VOLTSTART_IDX) 549 itesio_refresh_temp(sc, edata); 550 else if (edata->sensor >= IT_VOLTSTART_IDX && 551 edata->sensor < IT_FANSTART_IDX) 552 itesio_refresh_volts(sc, edata); 553 else 554 itesio_refresh_fans(sc, edata); 555 } 556 557 static int 558 itesio_wdt_setmode(struct sysmon_wdog *smw) 559 { 560 struct itesio_softc *sc = smw->smw_cookie; 561 int period = smw->smw_period; 562 563 /* Enter MB PNP mode and select the WDT LDN */ 564 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 565 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 566 ITESIO_WDT_LDN); 567 568 if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { 569 /* Disable the watchdog */ 570 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CTL, 0); 571 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CNF, 0); 572 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 0); 573 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 0); 574 } else { 575 /* Enable the watchdog */ 576 if (period > ITESIO_WDT_MAXTIMO || period < 1) 577 period = smw->smw_period = ITESIO_WDT_MAXTIMO; 578 579 period *= 2; 580 581 /* set the timeout and start the watchdog */ 582 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 583 period >> 8); 584 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 585 period & 0xff); 586 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_CNF, 587 ITESIO_WDT_CNF_SECS | ITESIO_WDT_CNF_KRST | 588 ITESIO_WDT_CNF_PWROK); 589 } 590 /* we are done, exit MB PNP mode */ 591 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 592 593 return 0; 594 } 595 596 static int 597 itesio_wdt_tickle(struct sysmon_wdog *smw) 598 { 599 struct itesio_softc *sc = smw->smw_cookie; 600 int period = smw->smw_period * 2; 601 602 /* refresh timeout value and exit */ 603 itesio_enter(sc->sc_iot, sc->sc_pnp_ioh); 604 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_LDNSEL, 605 ITESIO_WDT_LDN); 606 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_MSB, 607 period >> 8); 608 itesio_writereg(sc->sc_iot, sc->sc_pnp_ioh, ITESIO_WDT_TMO_LSB, 609 period & 0xff); 610 itesio_exit(sc->sc_iot, sc->sc_pnp_ioh); 611 612 return 0; 613 } 614 615 MODULE(MODULE_CLASS_DRIVER, itesio, NULL); 616 617 #ifdef _MODULE 618 #include "ioconf.c" 619 #endif 620 621 static int 622 itesio_modcmd(modcmd_t cmd, void *opaque) 623 { 624 switch (cmd) { 625 case MODULE_CMD_INIT: 626 #ifdef _MODULE 627 return config_init_component(cfdriver_ioconf_itesio, 628 cfattach_ioconf_itesio, cfdata_ioconf_itesio); 629 #else 630 return 0; 631 #endif 632 case MODULE_CMD_FINI: 633 #ifdef _MODULE 634 return config_fini_component(cfdriver_ioconf_itesio, 635 cfattach_ioconf_itesio, cfdata_ioconf_itesio); 636 #else 637 return 0; 638 #endif 639 default: 640 return ENOTTY; 641 } 642 } 643
Indexes created Tue Sep 30 20:09:53 GMT 2025