1/*- 2 * Copyright (c) 2010 Andreas Tobler 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 21 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 22 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/param.h> 31#include <sys/bus.h> 32#include <sys/systm.h> 33#include <sys/module.h> 34#include <sys/callout.h> 35#include <sys/conf.h> 36#include <sys/cpu.h> 37#include <sys/ctype.h> 38#include <sys/kernel.h> 39#include <sys/reboot.h> 40#include <sys/rman.h> 41#include <sys/sysctl.h> 42#include <sys/limits.h> 43 44#include <machine/bus.h> 45#include <machine/md_var.h> 46 47#include <dev/iicbus/iicbus.h> 48#include <dev/iicbus/iiconf.h> 49 50#include <dev/ofw/openfirm.h> 51#include <dev/ofw/ofw_bus.h> 52#include <powerpc/powermac/powermac_thermal.h> 53 54/* FCU registers 55 * /u3@0,f8000000/i2c@f8001000/fan@15e 56 */ 57#define FCU_RPM_FAIL 0x0b /* fans states in bits 0<1-6>7 */ 58#define FCU_RPM_AVAILABLE 0x0c 59#define FCU_RPM_ACTIVE 0x0d 60#define FCU_RPM_READ(x) 0x11 + (x) * 2 61#define FCU_RPM_SET(x) 0x10 + (x) * 2 62 63#define FCU_PWM_FAIL 0x2b 64#define FCU_PWM_AVAILABLE 0x2c 65#define FCU_PWM_ACTIVE 0x2d 66#define FCU_PWM_RPM(x) 0x31 + (x) * 2 /* Get RPM. */ 67#define FCU_PWM_SGET(x) 0x30 + (x) * 2 /* Set or get PWM. */ 68 69struct fcu_fan { 70 struct pmac_fan fan; 71 device_t dev; 72 73 int id; 74 enum { 75 FCU_FAN_RPM, 76 FCU_FAN_PWM 77 } type; 78 int setpoint; 79 int rpm; 80}; 81 82struct fcu_softc { 83 device_t sc_dev; 84 struct intr_config_hook enum_hook; 85 uint32_t sc_addr; 86 struct fcu_fan *sc_fans; 87 int sc_nfans; 88}; 89 90/* We can read the PWM and the RPM from a PWM controlled fan. 91 * Offer both values via sysctl. 92 */ 93enum { 94 FCU_PWM_SYSCTL_PWM = 1 << 8, 95 FCU_PWM_SYSCTL_RPM = 2 << 8 96}; 97 98static int fcu_rpm_shift; 99 100/* Regular bus attachment functions */ 101static int fcu_probe(device_t); 102static int fcu_attach(device_t); 103 104/* Utility functions */ 105static void fcu_attach_fans(device_t dev); 106static int fcu_fill_fan_prop(device_t dev); 107static int fcu_fan_set_rpm(struct fcu_fan *fan, int rpm); 108static int fcu_fan_get_rpm(struct fcu_fan *fan); 109static int fcu_fan_set_pwm(struct fcu_fan *fan, int pwm); 110static int fcu_fan_get_pwm(device_t dev, struct fcu_fan *fan, int *pwm, 111 int *rpm); 112static int fcu_fanrpm_sysctl(SYSCTL_HANDLER_ARGS); 113static void fcu_start(void *xdev); 114static int fcu_write(device_t dev, uint32_t addr, uint8_t reg, uint8_t *buf, 115 int len); 116static int fcu_read_1(device_t dev, uint32_t addr, uint8_t reg, uint8_t *data); 117 118static device_method_t fcu_methods[] = { 119 /* Device interface */ 120 DEVMETHOD(device_probe, fcu_probe), 121 DEVMETHOD(device_attach, fcu_attach), 122 { 0, 0 }, 123}; 124 125static driver_t fcu_driver = { 126 "fcu", 127 fcu_methods, 128 sizeof(struct fcu_softc) 129}; 130 131static devclass_t fcu_devclass; 132 133DRIVER_MODULE(fcu, iicbus, fcu_driver, fcu_devclass, 0, 0); 134static MALLOC_DEFINE(M_FCU, "fcu", "FCU Sensor Information"); 135 136static int 137fcu_write(device_t dev, uint32_t addr, uint8_t reg, uint8_t *buff, 138 int len) 139{ 140 unsigned char buf[4]; 141 int try = 0; 142 143 struct iic_msg msg[] = { 144 { addr, IIC_M_WR, 0, buf } 145 }; 146 147 msg[0].len = len + 1; 148 buf[0] = reg; 149 memcpy(buf + 1, buff, len); 150 151 for (;;) 152 { 153 if (iicbus_transfer(dev, msg, 1) == 0) 154 return (0); 155 156 if (++try > 5) { 157 device_printf(dev, "iicbus write failed\n"); 158 return (-1); 159 } 160 pause("fcu_write", hz); 161 } 162} 163 164static int 165fcu_read_1(device_t dev, uint32_t addr, uint8_t reg, uint8_t *data) 166{ 167 uint8_t buf[4]; 168 int err, try = 0; 169 170 struct iic_msg msg[2] = { 171 { addr, IIC_M_WR | IIC_M_NOSTOP, 1, ® }, 172 { addr, IIC_M_RD, 1, buf }, 173 }; 174 175 for (;;) 176 { 177 err = iicbus_transfer(dev, msg, 2); 178 if (err != 0) 179 goto retry; 180 181 *data = *((uint8_t*)buf); 182 return (0); 183 retry: 184 if (++try > 5) { 185 device_printf(dev, "iicbus read failed\n"); 186 return (-1); 187 } 188 pause("fcu_read_1", hz); 189 } 190} 191 192static int 193fcu_probe(device_t dev) 194{ 195 const char *name, *compatible; 196 struct fcu_softc *sc; 197 198 name = ofw_bus_get_name(dev); 199 compatible = ofw_bus_get_compat(dev); 200 201 if (!name) 202 return (ENXIO); 203 204 if (strcmp(name, "fan") != 0 || strcmp(compatible, "fcu") != 0) 205 return (ENXIO); 206 207 sc = device_get_softc(dev); 208 sc->sc_dev = dev; 209 sc->sc_addr = iicbus_get_addr(dev); 210 211 device_set_desc(dev, "Apple Fan Control Unit"); 212 213 return (0); 214} 215 216static int 217fcu_attach(device_t dev) 218{ 219 struct fcu_softc *sc; 220 221 sc = device_get_softc(dev); 222 223 sc->enum_hook.ich_func = fcu_start; 224 sc->enum_hook.ich_arg = dev; 225 226 /* We have to wait until interrupts are enabled. I2C read and write 227 * only works if the interrupts are available. 228 * The unin/i2c is controlled by the htpic on unin. But this is not 229 * the master. The openpic on mac-io is controlling the htpic. 230 * This one gets attached after the mac-io probing and then the 231 * interrupts will be available. 232 */ 233 234 if (config_intrhook_establish(&sc->enum_hook) != 0) 235 return (ENOMEM); 236 237 return (0); 238} 239 240static void 241fcu_start(void *xdev) 242{ 243 unsigned char buf[1] = { 0xff }; 244 struct fcu_softc *sc; 245 246 device_t dev = (device_t)xdev; 247 248 sc = device_get_softc(dev); 249 250 /* Start the fcu device. */ 251 fcu_write(sc->sc_dev, sc->sc_addr, 0xe, buf, 1); 252 fcu_write(sc->sc_dev, sc->sc_addr, 0x2e, buf, 1); 253 fcu_read_1(sc->sc_dev, sc->sc_addr, 0, buf); 254 fcu_rpm_shift = (buf[0] == 1) ? 2 : 3; 255 256 device_printf(dev, "FCU initialized, RPM shift: %d\n", 257 fcu_rpm_shift); 258 259 /* Detect and attach child devices. */ 260 261 fcu_attach_fans(dev); 262 263 config_intrhook_disestablish(&sc->enum_hook); 264 265} 266 267static int 268fcu_fan_set_rpm(struct fcu_fan *fan, int rpm) 269{ 270 uint8_t reg; 271 struct fcu_softc *sc; 272 unsigned char buf[2]; 273 274 sc = device_get_softc(fan->dev); 275 276 /* Clamp to allowed range */ 277 rpm = max(fan->fan.min_rpm, rpm); 278 rpm = min(fan->fan.max_rpm, rpm); 279 280 if (fan->type == FCU_FAN_RPM) { 281 reg = FCU_RPM_SET(fan->id); 282 fan->setpoint = rpm; 283 } else { 284 device_printf(fan->dev, "Unknown fan type: %d\n", fan->type); 285 return (ENXIO); 286 } 287 288 buf[0] = rpm >> (8 - fcu_rpm_shift); 289 buf[1] = rpm << fcu_rpm_shift; 290 291 if (fcu_write(sc->sc_dev, sc->sc_addr, reg, buf, 2) < 0) 292 return (EIO); 293 294 return (0); 295} 296 297static int 298fcu_fan_get_rpm(struct fcu_fan *fan) 299{ 300 uint8_t reg; 301 struct fcu_softc *sc; 302 uint8_t buff[2] = { 0, 0 }; 303 uint8_t active = 0, avail = 0, fail = 0; 304 int rpm; 305 306 sc = device_get_softc(fan->dev); 307 308 if (fan->type == FCU_FAN_RPM) { 309 /* Check if the fan is available. */ 310 reg = FCU_RPM_AVAILABLE; 311 if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, &avail) < 0) 312 return (-1); 313 if ((avail & (1 << fan->id)) == 0) { 314 device_printf(fan->dev, 315 "RPM Fan not available ID: %d\n", fan->id); 316 return (-1); 317 } 318 /* Check if we have a failed fan. */ 319 reg = FCU_RPM_FAIL; 320 if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, &fail) < 0) 321 return (-1); 322 if ((fail & (1 << fan->id)) != 0) { 323 device_printf(fan->dev, 324 "RPM Fan failed ID: %d\n", fan->id); 325 return (-1); 326 } 327 /* Check if fan is active. */ 328 reg = FCU_RPM_ACTIVE; 329 if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, &active) < 0) 330 return (-1); 331 if ((active & (1 << fan->id)) == 0) { 332 device_printf(fan->dev, "RPM Fan not active ID: %d\n", 333 fan->id); 334 return (-1); 335 } 336 reg = FCU_RPM_READ(fan->id); 337 338 } else { 339 device_printf(fan->dev, "Unknown fan type: %d\n", fan->type); 340 return (-1); 341 } 342 343 /* It seems that we can read the fans rpm. */ 344 if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, buff) < 0) 345 return (-1); 346 347 rpm = (buff[0] << (8 - fcu_rpm_shift)) | buff[1] >> fcu_rpm_shift; 348 349 return (rpm); 350} 351 352static int 353fcu_fan_set_pwm(struct fcu_fan *fan, int pwm) 354{ 355 uint8_t reg; 356 struct fcu_softc *sc; 357 uint8_t buf[2]; 358 359 sc = device_get_softc(fan->dev); 360 361 /* Clamp to allowed range */ 362 pwm = max(fan->fan.min_rpm, pwm); 363 pwm = min(fan->fan.max_rpm, pwm); 364 365 if (fan->type == FCU_FAN_PWM) { 366 reg = FCU_PWM_SGET(fan->id); 367 if (pwm > 100) 368 pwm = 100; 369 if (pwm < 30) 370 pwm = 30; 371 fan->setpoint = pwm; 372 } else { 373 device_printf(fan->dev, "Unknown fan type: %d\n", fan->type); 374 return (EIO); 375 } 376 377 buf[0] = (pwm * 2550) / 1000; 378 379 if (fcu_write(sc->sc_dev, sc->sc_addr, reg, buf, 1) < 0) 380 return (EIO); 381 return (0); 382} 383 384static int 385fcu_fan_get_pwm(device_t dev, struct fcu_fan *fan, int *pwm, int *rpm) 386{ 387 uint8_t reg; 388 struct fcu_softc *sc; 389 uint8_t buf[2]; 390 uint8_t active = 0, avail = 0, fail = 0; 391 392 sc = device_get_softc(dev); 393 394 if (fan->type == FCU_FAN_PWM) { 395 /* Check if the fan is available. */ 396 reg = FCU_PWM_AVAILABLE; 397 if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, &avail) < 0) 398 return (-1); 399 if ((avail & (1 << fan->id)) == 0) { 400 device_printf(dev, "PWM Fan not available ID: %d\n", 401 fan->id); 402 return (-1); 403 } 404 /* Check if we have a failed fan. */ 405 reg = FCU_PWM_FAIL; 406 if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, &fail) < 0) 407 return (-1); 408 if ((fail & (1 << fan->id)) != 0) { 409 device_printf(dev, "PWM Fan failed ID: %d\n", fan->id); 410 return (-1); 411 } 412 /* Check if fan is active. */ 413 reg = FCU_PWM_ACTIVE; 414 if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, &active) < 0) 415 return (-1); 416 if ((active & (1 << fan->id)) == 0) { 417 device_printf(dev, "PWM Fan not active ID: %d\n", 418 fan->id); 419 return (-1); 420 } 421 reg = FCU_PWM_SGET(fan->id); 422 } else { 423 device_printf(dev, "Unknown fan type: %d\n", fan->type); 424 return (EIO); 425 } 426 427 /* It seems that we can read the fans pwm. */ 428 if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, buf) < 0) 429 return (-1); 430 431 *pwm = (buf[0] * 1000) / 2550; 432 433 /* Now read the rpm. */ 434 reg = FCU_PWM_RPM(fan->id); 435 if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, buf) < 0) 436 return (-1); 437 438 *rpm = (buf[0] << (8 - fcu_rpm_shift)) | buf[1] >> fcu_rpm_shift; 439 440 return (0); 441} 442 443/* 444 * This function returns the number of fans. If we call it the second time 445 * and we have allocated memory for sc->sc_fans, we fill in the properties. 446 */ 447static int 448fcu_fill_fan_prop(device_t dev) 449{ 450 phandle_t child; 451 struct fcu_softc *sc; 452 u_int id[8]; 453 char location[96]; 454 char type[64]; 455 int i = 0, j, len = 0, prop_len, prev_len = 0; 456 457 sc = device_get_softc(dev); 458 459 child = ofw_bus_get_node(dev); 460 461 /* Fill the fan location property. */ 462 prop_len = OF_getprop(child, "hwctrl-location", location, 463 sizeof(location)); 464 while (len < prop_len) { 465 if (sc->sc_fans != NULL) { 466 strcpy(sc->sc_fans[i].fan.name, location + len); 467 } 468 prev_len = strlen(location + len) + 1; 469 len += prev_len; 470 i++; 471 } 472 if (sc->sc_fans == NULL) 473 return (i); 474 475 /* Fill the fan type property. */ 476 len = 0; 477 i = 0; 478 prev_len = 0; 479 prop_len = OF_getprop(child, "hwctrl-type", type, sizeof(type)); 480 while (len < prop_len) { 481 if (strcmp(type + len, "fan-rpm") == 0) 482 sc->sc_fans[i].type = FCU_FAN_RPM; 483 else 484 sc->sc_fans[i].type = FCU_FAN_PWM; 485 prev_len = strlen(type + len) + 1; 486 len += prev_len; 487 i++; 488 } 489 490 /* Fill the fan ID property. */ 491 prop_len = OF_getprop(child, "hwctrl-id", id, sizeof(id)); 492 for (j = 0; j < i; j++) 493 sc->sc_fans[j].id = ((id[j] >> 8) & 0x0f) % 8; 494 495 /* Fill the fan zone property. */ 496 prop_len = OF_getprop(child, "hwctrl-zone", id, sizeof(id)); 497 for (j = 0; j < i; j++) 498 sc->sc_fans[j].fan.zone = id[j]; 499 500 /* Finish setting up fan properties */ 501 for (j = 0; j < i; j++) { 502 sc->sc_fans[j].dev = sc->sc_dev; 503 if (sc->sc_fans[j].type == FCU_FAN_RPM) { 504 sc->sc_fans[j].fan.min_rpm = 4800 >> fcu_rpm_shift; 505 sc->sc_fans[j].fan.max_rpm = 56000 >> fcu_rpm_shift; 506 sc->sc_fans[j].setpoint = 507 fcu_fan_get_rpm(&sc->sc_fans[j]); 508 sc->sc_fans[j].fan.read = 509 (int (*)(struct pmac_fan *))(fcu_fan_get_rpm); 510 sc->sc_fans[j].fan.set = 511 (int (*)(struct pmac_fan *, int))(fcu_fan_set_rpm); 512 } else { 513 sc->sc_fans[j].fan.min_rpm = 30; /* Percent */ 514 sc->sc_fans[j].fan.max_rpm = 100; 515 sc->sc_fans[j].fan.read = NULL; 516 sc->sc_fans[j].fan.set = 517 (int (*)(struct pmac_fan *, int))(fcu_fan_set_pwm); 518 } 519 sc->sc_fans[j].fan.default_rpm = sc->sc_fans[j].fan.max_rpm; 520 } 521 522 return (i); 523} 524 525static int 526fcu_fanrpm_sysctl(SYSCTL_HANDLER_ARGS) 527{ 528 device_t fcu; 529 struct fcu_softc *sc; 530 struct fcu_fan *fan; 531 int rpm = 0, pwm = 0, error = 0; 532 533 fcu = arg1; 534 sc = device_get_softc(fcu); 535 fan = &sc->sc_fans[arg2 & 0x00ff]; 536 if (fan->type == FCU_FAN_RPM) { 537 rpm = fcu_fan_get_rpm(fan); 538 if (rpm < 0) 539 return (EIO); 540 error = sysctl_handle_int(oidp, &rpm, 0, req); 541 } else { 542 error = fcu_fan_get_pwm(fcu, fan, &pwm, &rpm); 543 if (error < 0) 544 return (EIO); 545 546 switch (arg2 & 0xff00) { 547 case FCU_PWM_SYSCTL_PWM: 548 error = sysctl_handle_int(oidp, &pwm, 0, req); 549 break; 550 case FCU_PWM_SYSCTL_RPM: 551 error = sysctl_handle_int(oidp, &rpm, 0, req); 552 break; 553 default: 554 /* This should never happen */ 555 return (EINVAL); 556 } 557 } 558 559 /* We can only read the RPM from a PWM controlled fan, so return. */ 560 if ((arg2 & 0xff00) == FCU_PWM_SYSCTL_RPM) 561 return (0); 562 563 if (error || !req->newptr) 564 return (error); 565 566 if (fan->type == FCU_FAN_RPM) 567 return (fcu_fan_set_rpm(fan, rpm)); 568 else 569 return (fcu_fan_set_pwm(fan, pwm)); 570} 571 572static void 573fcu_attach_fans(device_t dev) 574{ 575 struct fcu_softc *sc; 576 struct sysctl_oid *oid, *fanroot_oid; 577 struct sysctl_ctx_list *ctx; 578 char sysctl_name[32]; 579 int i, j; 580 581 sc = device_get_softc(dev); 582 583 sc->sc_nfans = 0; 584 585 /* Count the actual number of fans. */ 586 sc->sc_nfans = fcu_fill_fan_prop(dev); 587 588 device_printf(dev, "%d fans detected!\n", sc->sc_nfans); 589 590 if (sc->sc_nfans == 0) { 591 device_printf(dev, "WARNING: No fans detected!\n"); 592 return; 593 } 594 595 sc->sc_fans = malloc(sc->sc_nfans * sizeof(struct fcu_fan), M_FCU, 596 M_WAITOK | M_ZERO); 597 598 ctx = device_get_sysctl_ctx(dev); 599 fanroot_oid = SYSCTL_ADD_NODE(ctx, 600 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "fans", 601 CTLFLAG_RD, 0, "FCU Fan Information"); 602 603 /* Now we can fill the properties into the allocated struct. */ 604 sc->sc_nfans = fcu_fill_fan_prop(dev); 605 606 /* Register fans with pmac_thermal */ 607 for (i = 0; i < sc->sc_nfans; i++) 608 pmac_thermal_fan_register(&sc->sc_fans[i].fan); 609 610 /* Add sysctls for the fans. */ 611 for (i = 0; i < sc->sc_nfans; i++) { 612 for (j = 0; j < strlen(sc->sc_fans[i].fan.name); j++) { 613 sysctl_name[j] = tolower(sc->sc_fans[i].fan.name[j]); 614 if (isspace(sysctl_name[j])) 615 sysctl_name[j] = '_'; 616 } 617 sysctl_name[j] = 0; 618 619 if (sc->sc_fans[i].type == FCU_FAN_RPM) { 620 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(fanroot_oid), 621 OID_AUTO, sysctl_name, 622 CTLFLAG_RD, 0, "Fan Information"); 623 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 624 "minrpm", CTLFLAG_RD, 625 &(sc->sc_fans[i].fan.min_rpm), 0, 626 "Minimum allowed RPM"); 627 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 628 "maxrpm", CTLFLAG_RD, 629 &(sc->sc_fans[i].fan.max_rpm), 0, 630 "Maximum allowed RPM"); 631 /* I use i to pass the fan id. */ 632 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 633 "rpm", CTLTYPE_INT | CTLFLAG_RW, dev, i, 634 fcu_fanrpm_sysctl, "I", "Fan RPM"); 635 } else { 636 fcu_fan_get_pwm(dev, &sc->sc_fans[i], 637 &sc->sc_fans[i].setpoint, 638 &sc->sc_fans[i].rpm); 639 640 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(fanroot_oid), 641 OID_AUTO, sysctl_name, 642 CTLFLAG_RD, 0, "Fan Information"); 643 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 644 "minpwm", CTLFLAG_RD, 645 &(sc->sc_fans[i].fan.min_rpm), 0, 646 "Minimum allowed PWM in %"); 647 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 648 "maxpwm", CTLFLAG_RD, 649 &(sc->sc_fans[i].fan.max_rpm), 0, 650 "Maximum allowed PWM in %"); 651 /* I use i to pass the fan id or'ed with the type 652 * of info I want to display/modify. 653 */ 654 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 655 "pwm", CTLTYPE_INT | CTLFLAG_RW, dev, 656 FCU_PWM_SYSCTL_PWM | i, 657 fcu_fanrpm_sysctl, "I", "Fan PWM in %"); 658 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 659 "rpm", CTLTYPE_INT | CTLFLAG_RD, dev, 660 FCU_PWM_SYSCTL_RPM | i, 661 fcu_fanrpm_sysctl, "I", "Fan RPM"); 662 } 663 } 664 665 /* Dump fan location, type & RPM. */ 666 if (bootverbose) { 667 device_printf(dev, "Fans\n"); 668 for (i = 0; i < sc->sc_nfans; i++) { 669 device_printf(dev, "Location: %s type: %d ID: %d " 670 "RPM: %d\n", sc->sc_fans[i].fan.name, 671 sc->sc_fans[i].type, sc->sc_fans[i].id, 672 (sc->sc_fans[i].type == FCU_FAN_RPM) ? 673 sc->sc_fans[i].setpoint : 674 sc->sc_fans[i].rpm ); 675 } 676 } 677} 678