1 /*- 2 * Copyright (c) 2009 Oleksandr Tymoshenko <gonzo@freebsd.org> 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 AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, 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/systm.h> 32 #include <sys/bus.h> 33 #include <sys/gpio.h> 34 #include <sys/kernel.h> 35 #include <sys/malloc.h> 36 #include <sys/module.h> 37 38 #include <dev/gpio/gpiobusvar.h> 39 40 #include "gpiobus_if.h" 41 42 #undef GPIOBUS_DEBUG 43 #ifdef GPIOBUS_DEBUG 44 #define dprintf printf 45 #else 46 #define dprintf(x, arg...) 47 #endif 48 49 static void gpiobus_print_pins(struct gpiobus_ivar *, char *, size_t); 50 static int gpiobus_parse_pins(struct gpiobus_softc *, device_t, int); 51 static int gpiobus_probe(device_t); 52 static int gpiobus_attach(device_t); 53 static int gpiobus_detach(device_t); 54 static int gpiobus_suspend(device_t); 55 static int gpiobus_resume(device_t); 56 static void gpiobus_probe_nomatch(device_t, device_t); 57 static int gpiobus_print_child(device_t, device_t); 58 static int gpiobus_child_location_str(device_t, device_t, char *, size_t); 59 static int gpiobus_child_pnpinfo_str(device_t, device_t, char *, size_t); 60 static device_t gpiobus_add_child(device_t, u_int, const char *, int); 61 static void gpiobus_hinted_child(device_t, const char *, int); 62 63 /* 64 * GPIOBUS interface 65 */ 66 static int gpiobus_acquire_bus(device_t, device_t, int); 67 static void gpiobus_release_bus(device_t, device_t); 68 static int gpiobus_pin_setflags(device_t, device_t, uint32_t, uint32_t); 69 static int gpiobus_pin_getflags(device_t, device_t, uint32_t, uint32_t*); 70 static int gpiobus_pin_getcaps(device_t, device_t, uint32_t, uint32_t*); 71 static int gpiobus_pin_set(device_t, device_t, uint32_t, unsigned int); 72 static int gpiobus_pin_get(device_t, device_t, uint32_t, unsigned int*); 73 static int gpiobus_pin_toggle(device_t, device_t, uint32_t); 74 75 int 76 gpio_check_flags(uint32_t caps, uint32_t flags) 77 { 78 79 /* Check for unwanted flags. */ 80 if ((flags & caps) == 0 || (flags & caps) != flags) 81 return (EINVAL); 82 /* Cannot mix input/output together. */ 83 if (flags & GPIO_PIN_INPUT && flags & GPIO_PIN_OUTPUT) 84 return (EINVAL); 85 /* Cannot mix pull-up/pull-down together. */ 86 if (flags & GPIO_PIN_PULLUP && flags & GPIO_PIN_PULLDOWN) 87 return (EINVAL); 88 89 return (0); 90 } 91 92 static void 93 gpiobus_print_pins(struct gpiobus_ivar *devi, char *buf, size_t buflen) 94 { 95 char tmp[128]; 96 int i, range_start, range_stop, need_coma; 97 98 if (devi->npins == 0) 99 return; 100 101 need_coma = 0; 102 range_start = range_stop = devi->pins[0]; 103 for (i = 1; i < devi->npins; i++) { 104 if (devi->pins[i] != (range_stop + 1)) { 105 if (need_coma) 106 strlcat(buf, ",", buflen); 107 memset(tmp, 0, sizeof(tmp)); 108 if (range_start != range_stop) 109 snprintf(tmp, sizeof(tmp) - 1, "%d-%d", 110 range_start, range_stop); 111 else 112 snprintf(tmp, sizeof(tmp) - 1, "%d", 113 range_start); 114 strlcat(buf, tmp, buflen); 115 116 range_start = range_stop = devi->pins[i]; 117 need_coma = 1; 118 } 119 else 120 range_stop++; 121 } 122 123 if (need_coma) 124 strlcat(buf, ",", buflen); 125 memset(tmp, 0, sizeof(tmp)); 126 if (range_start != range_stop) 127 snprintf(tmp, sizeof(tmp) - 1, "%d-%d", 128 range_start, range_stop); 129 else 130 snprintf(tmp, sizeof(tmp) - 1, "%d", 131 range_start); 132 strlcat(buf, tmp, buflen); 133 } 134 135 device_t 136 gpiobus_attach_bus(device_t dev) 137 { 138 device_t busdev; 139 140 busdev = device_add_child(dev, "gpiobus", -1); 141 if (busdev == NULL) 142 return (NULL); 143 if (device_add_child(dev, "gpioc", -1) == NULL) { 144 device_delete_child(dev, busdev); 145 return (NULL); 146 } 147 #ifdef FDT 148 ofw_gpiobus_register_provider(dev); 149 #endif 150 bus_generic_attach(dev); 151 152 return (busdev); 153 } 154 155 int 156 gpiobus_detach_bus(device_t dev) 157 { 158 159 #ifdef FDT 160 ofw_gpiobus_unregister_provider(dev); 161 #endif 162 163 return (bus_generic_detach(dev)); 164 } 165 166 int 167 gpiobus_init_softc(device_t dev) 168 { 169 struct gpiobus_softc *sc; 170 171 sc = GPIOBUS_SOFTC(dev); 172 sc->sc_busdev = dev; 173 sc->sc_dev = device_get_parent(dev); 174 sc->sc_intr_rman.rm_type = RMAN_ARRAY; 175 sc->sc_intr_rman.rm_descr = "GPIO Interrupts"; 176 if (rman_init(&sc->sc_intr_rman) != 0 || 177 rman_manage_region(&sc->sc_intr_rman, 0, ~0) != 0) 178 panic("%s: failed to set up rman.", __func__); 179 180 if (GPIO_PIN_MAX(sc->sc_dev, &sc->sc_npins) != 0) 181 return (ENXIO); 182 183 KASSERT(sc->sc_npins != 0, ("GPIO device with no pins")); 184 185 /* Pins = GPIO_PIN_MAX() + 1 */ 186 sc->sc_npins++; 187 188 sc->sc_pins = malloc(sizeof(*sc->sc_pins) * sc->sc_npins, M_DEVBUF, 189 M_NOWAIT | M_ZERO); 190 if (sc->sc_pins == NULL) 191 return (ENOMEM); 192 193 /* Initialize the bus lock. */ 194 GPIOBUS_LOCK_INIT(sc); 195 196 return (0); 197 } 198 199 int 200 gpiobus_alloc_ivars(struct gpiobus_ivar *devi) 201 { 202 203 /* Allocate pins and flags memory. */ 204 devi->pins = malloc(sizeof(uint32_t) * devi->npins, M_DEVBUF, 205 M_NOWAIT | M_ZERO); 206 if (devi->pins == NULL) 207 return (ENOMEM); 208 devi->flags = malloc(sizeof(uint32_t) * devi->npins, M_DEVBUF, 209 M_NOWAIT | M_ZERO); 210 if (devi->flags == NULL) { 211 free(devi->pins, M_DEVBUF); 212 return (ENOMEM); 213 } 214 215 return (0); 216 } 217 218 void 219 gpiobus_free_ivars(struct gpiobus_ivar *devi) 220 { 221 222 if (devi->flags) { 223 free(devi->flags, M_DEVBUF); 224 devi->flags = NULL; 225 } 226 if (devi->pins) { 227 free(devi->pins, M_DEVBUF); 228 devi->pins = NULL; 229 } 230 } 231 232 int 233 gpiobus_map_pin(device_t bus, uint32_t pin) 234 { 235 struct gpiobus_softc *sc; 236 237 sc = device_get_softc(bus); 238 /* Consistency check. */ 239 if (pin >= sc->sc_npins) { 240 device_printf(bus, 241 "invalid pin %d, max: %d\n", pin, sc->sc_npins - 1); 242 return (-1); 243 } 244 /* Mark pin as mapped and give warning if it's already mapped. */ 245 if (sc->sc_pins[pin].mapped) { 246 device_printf(bus, "warning: pin %d is already mapped\n", pin); 247 return (-1); 248 } 249 sc->sc_pins[pin].mapped = 1; 250 251 return (0); 252 } 253 254 static int 255 gpiobus_parse_pins(struct gpiobus_softc *sc, device_t child, int mask) 256 { 257 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 258 int i, npins; 259 260 npins = 0; 261 for (i = 0; i < 32; i++) { 262 if (mask & (1 << i)) 263 npins++; 264 } 265 if (npins == 0) { 266 device_printf(child, "empty pin mask\n"); 267 return (EINVAL); 268 } 269 devi->npins = npins; 270 if (gpiobus_alloc_ivars(devi) != 0) { 271 device_printf(child, "cannot allocate device ivars\n"); 272 return (EINVAL); 273 } 274 npins = 0; 275 for (i = 0; i < 32; i++) { 276 if ((mask & (1 << i)) == 0) 277 continue; 278 /* Reserve the GPIO pin. */ 279 if (gpiobus_map_pin(sc->sc_busdev, i) != 0) { 280 gpiobus_free_ivars(devi); 281 return (EINVAL); 282 } 283 devi->pins[npins++] = i; 284 /* Use the child name as pin name. */ 285 GPIOBUS_PIN_SETNAME(sc->sc_busdev, i, 286 device_get_nameunit(child)); 287 } 288 289 return (0); 290 } 291 292 static int 293 gpiobus_probe(device_t dev) 294 { 295 device_set_desc(dev, "GPIO bus"); 296 297 return (BUS_PROBE_GENERIC); 298 } 299 300 static int 301 gpiobus_attach(device_t dev) 302 { 303 int err; 304 305 err = gpiobus_init_softc(dev); 306 if (err != 0) 307 return (err); 308 309 /* 310 * Get parent's pins and mark them as unmapped 311 */ 312 bus_generic_probe(dev); 313 bus_enumerate_hinted_children(dev); 314 315 return (bus_generic_attach(dev)); 316 } 317 318 /* 319 * Since this is not a self-enumerating bus, and since we always add 320 * children in attach, we have to always delete children here. 321 */ 322 static int 323 gpiobus_detach(device_t dev) 324 { 325 struct gpiobus_softc *sc; 326 struct gpiobus_ivar *devi; 327 device_t *devlist; 328 int i, err, ndevs; 329 330 sc = GPIOBUS_SOFTC(dev); 331 KASSERT(mtx_initialized(&sc->sc_mtx), 332 ("gpiobus mutex not initialized")); 333 GPIOBUS_LOCK_DESTROY(sc); 334 335 if ((err = bus_generic_detach(dev)) != 0) 336 return (err); 337 338 if ((err = device_get_children(dev, &devlist, &ndevs)) != 0) 339 return (err); 340 for (i = 0; i < ndevs; i++) { 341 device_delete_child(dev, devlist[i]); 342 devi = GPIOBUS_IVAR(devlist[i]); 343 gpiobus_free_ivars(devi); 344 } 345 free(devlist, M_TEMP); 346 if (sc->sc_pins) { 347 for (i = 0; i < sc->sc_npins; i++) { 348 if (sc->sc_pins[i].name != NULL) 349 free(sc->sc_pins[i].name, M_DEVBUF); 350 sc->sc_pins[i].name = NULL; 351 } 352 free(sc->sc_pins, M_DEVBUF); 353 sc->sc_pins = NULL; 354 } 355 356 return (0); 357 } 358 359 static int 360 gpiobus_suspend(device_t dev) 361 { 362 363 return (bus_generic_suspend(dev)); 364 } 365 366 static int 367 gpiobus_resume(device_t dev) 368 { 369 370 return (bus_generic_resume(dev)); 371 } 372 373 static void 374 gpiobus_probe_nomatch(device_t dev, device_t child) 375 { 376 char pins[128]; 377 struct gpiobus_ivar *devi; 378 379 devi = GPIOBUS_IVAR(child); 380 memset(pins, 0, sizeof(pins)); 381 gpiobus_print_pins(devi, pins, sizeof(pins)); 382 device_printf(dev, "<unknown device> at pin(s) %s", pins); 383 resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%ld"); 384 printf("\n"); 385 } 386 387 static int 388 gpiobus_print_child(device_t dev, device_t child) 389 { 390 char pins[128]; 391 int retval = 0; 392 struct gpiobus_ivar *devi; 393 394 devi = GPIOBUS_IVAR(child); 395 memset(pins, 0, sizeof(pins)); 396 retval += bus_print_child_header(dev, child); 397 retval += printf(" at pin(s) "); 398 gpiobus_print_pins(devi, pins, sizeof(pins)); 399 retval += printf("%s", pins); 400 resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%ld"); 401 retval += bus_print_child_footer(dev, child); 402 403 return (retval); 404 } 405 406 static int 407 gpiobus_child_location_str(device_t bus, device_t child, char *buf, 408 size_t buflen) 409 { 410 struct gpiobus_ivar *devi; 411 412 devi = GPIOBUS_IVAR(child); 413 strlcpy(buf, "pin(s)=", buflen); 414 gpiobus_print_pins(devi, buf, buflen); 415 416 return (0); 417 } 418 419 static int 420 gpiobus_child_pnpinfo_str(device_t bus, device_t child, char *buf, 421 size_t buflen) 422 { 423 424 *buf = '\0'; 425 return (0); 426 } 427 428 static device_t 429 gpiobus_add_child(device_t dev, u_int order, const char *name, int unit) 430 { 431 device_t child; 432 struct gpiobus_ivar *devi; 433 434 child = device_add_child_ordered(dev, order, name, unit); 435 if (child == NULL) 436 return (child); 437 devi = malloc(sizeof(struct gpiobus_ivar), M_DEVBUF, M_NOWAIT | M_ZERO); 438 if (devi == NULL) { 439 device_delete_child(dev, child); 440 return (0); 441 } 442 resource_list_init(&devi->rl); 443 device_set_ivars(child, devi); 444 445 return (child); 446 } 447 448 static void 449 gpiobus_hinted_child(device_t bus, const char *dname, int dunit) 450 { 451 struct gpiobus_softc *sc = GPIOBUS_SOFTC(bus); 452 struct gpiobus_ivar *devi; 453 device_t child; 454 int irq, pins; 455 456 child = BUS_ADD_CHILD(bus, 0, dname, dunit); 457 devi = GPIOBUS_IVAR(child); 458 resource_int_value(dname, dunit, "pins", &pins); 459 if (gpiobus_parse_pins(sc, child, pins)) 460 device_delete_child(bus, child); 461 if (resource_int_value(dname, dunit, "irq", &irq) == 0) { 462 if (bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1) != 0) 463 device_printf(bus, 464 "warning: bus_set_resource() failed\n"); 465 } 466 } 467 468 static int 469 gpiobus_set_resource(device_t dev, device_t child, int type, int rid, 470 u_long start, u_long count) 471 { 472 struct gpiobus_ivar *devi; 473 struct resource_list_entry *rle; 474 475 dprintf("%s: entry (%p, %p, %d, %d, %p, %ld)\n", 476 __func__, dev, child, type, rid, (void *)(intptr_t)start, count); 477 devi = GPIOBUS_IVAR(child); 478 rle = resource_list_add(&devi->rl, type, rid, start, 479 start + count - 1, count); 480 if (rle == NULL) 481 return (ENXIO); 482 483 return (0); 484 } 485 486 static struct resource * 487 gpiobus_alloc_resource(device_t bus, device_t child, int type, int *rid, 488 u_long start, u_long end, u_long count, u_int flags) 489 { 490 struct gpiobus_softc *sc; 491 struct resource *rv; 492 struct resource_list *rl; 493 struct resource_list_entry *rle; 494 int isdefault; 495 496 if (type != SYS_RES_IRQ) 497 return (NULL); 498 isdefault = (start == 0UL && end == ~0UL && count == 1); 499 rle = NULL; 500 if (isdefault) { 501 rl = BUS_GET_RESOURCE_LIST(bus, child); 502 if (rl == NULL) 503 return (NULL); 504 rle = resource_list_find(rl, type, *rid); 505 if (rle == NULL) 506 return (NULL); 507 if (rle->res != NULL) 508 panic("%s: resource entry is busy", __func__); 509 start = rle->start; 510 count = rle->count; 511 end = rle->end; 512 } 513 sc = device_get_softc(bus); 514 rv = rman_reserve_resource(&sc->sc_intr_rman, start, end, count, flags, 515 child); 516 if (rv == NULL) 517 return (NULL); 518 rman_set_rid(rv, *rid); 519 if ((flags & RF_ACTIVE) != 0 && 520 bus_activate_resource(child, type, *rid, rv) != 0) { 521 rman_release_resource(rv); 522 return (NULL); 523 } 524 525 return (rv); 526 } 527 528 static int 529 gpiobus_release_resource(device_t bus __unused, device_t child, int type, 530 int rid, struct resource *r) 531 { 532 int error; 533 534 if (rman_get_flags(r) & RF_ACTIVE) { 535 error = bus_deactivate_resource(child, type, rid, r); 536 if (error) 537 return (error); 538 } 539 540 return (rman_release_resource(r)); 541 } 542 543 static struct resource_list * 544 gpiobus_get_resource_list(device_t bus __unused, device_t child) 545 { 546 struct gpiobus_ivar *ivar; 547 548 ivar = GPIOBUS_IVAR(child); 549 550 return (&ivar->rl); 551 } 552 553 static int 554 gpiobus_acquire_bus(device_t busdev, device_t child, int how) 555 { 556 struct gpiobus_softc *sc; 557 558 sc = device_get_softc(busdev); 559 GPIOBUS_ASSERT_UNLOCKED(sc); 560 GPIOBUS_LOCK(sc); 561 if (sc->sc_owner != NULL) { 562 if (how == GPIOBUS_DONTWAIT) { 563 GPIOBUS_UNLOCK(sc); 564 return (EWOULDBLOCK); 565 } 566 while (sc->sc_owner != NULL) 567 mtx_sleep(sc, &sc->sc_mtx, 0, "gpiobuswait", 0); 568 } 569 sc->sc_owner = child; 570 GPIOBUS_UNLOCK(sc); 571 572 return (0); 573 } 574 575 static void 576 gpiobus_release_bus(device_t busdev, device_t child) 577 { 578 struct gpiobus_softc *sc; 579 580 sc = device_get_softc(busdev); 581 GPIOBUS_ASSERT_UNLOCKED(sc); 582 GPIOBUS_LOCK(sc); 583 if (sc->sc_owner == NULL) 584 panic("gpiobus: releasing unowned bus."); 585 if (sc->sc_owner != child) 586 panic("gpiobus: you don't own the bus. game over."); 587 sc->sc_owner = NULL; 588 wakeup(sc); 589 GPIOBUS_UNLOCK(sc); 590 } 591 592 static int 593 gpiobus_pin_setflags(device_t dev, device_t child, uint32_t pin, 594 uint32_t flags) 595 { 596 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); 597 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 598 uint32_t caps; 599 600 if (pin >= devi->npins) 601 return (EINVAL); 602 if (GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], &caps) != 0) 603 return (EINVAL); 604 if (gpio_check_flags(caps, flags) != 0) 605 return (EINVAL); 606 607 return (GPIO_PIN_SETFLAGS(sc->sc_dev, devi->pins[pin], flags)); 608 } 609 610 static int 611 gpiobus_pin_getflags(device_t dev, device_t child, uint32_t pin, 612 uint32_t *flags) 613 { 614 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); 615 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 616 617 if (pin >= devi->npins) 618 return (EINVAL); 619 620 return GPIO_PIN_GETFLAGS(sc->sc_dev, devi->pins[pin], flags); 621 } 622 623 static int 624 gpiobus_pin_getcaps(device_t dev, device_t child, uint32_t pin, 625 uint32_t *caps) 626 { 627 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); 628 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 629 630 if (pin >= devi->npins) 631 return (EINVAL); 632 633 return GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], caps); 634 } 635 636 static int 637 gpiobus_pin_set(device_t dev, device_t child, uint32_t pin, 638 unsigned int value) 639 { 640 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); 641 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 642 643 if (pin >= devi->npins) 644 return (EINVAL); 645 646 return GPIO_PIN_SET(sc->sc_dev, devi->pins[pin], value); 647 } 648 649 static int 650 gpiobus_pin_get(device_t dev, device_t child, uint32_t pin, 651 unsigned int *value) 652 { 653 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); 654 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 655 656 if (pin >= devi->npins) 657 return (EINVAL); 658 659 return GPIO_PIN_GET(sc->sc_dev, devi->pins[pin], value); 660 } 661 662 static int 663 gpiobus_pin_toggle(device_t dev, device_t child, uint32_t pin) 664 { 665 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); 666 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 667 668 if (pin >= devi->npins) 669 return (EINVAL); 670 671 return GPIO_PIN_TOGGLE(sc->sc_dev, devi->pins[pin]); 672 } 673 674 static int 675 gpiobus_pin_getname(device_t dev, uint32_t pin, char *name) 676 { 677 struct gpiobus_softc *sc; 678 679 sc = GPIOBUS_SOFTC(dev); 680 if (pin > sc->sc_npins) 681 return (EINVAL); 682 /* Did we have a name for this pin ? */ 683 if (sc->sc_pins[pin].name != NULL) { 684 memcpy(name, sc->sc_pins[pin].name, GPIOMAXNAME); 685 return (0); 686 } 687 688 /* Return the default pin name. */ 689 return (GPIO_PIN_GETNAME(device_get_parent(dev), pin, name)); 690 } 691 692 static int 693 gpiobus_pin_setname(device_t dev, uint32_t pin, const char *name) 694 { 695 struct gpiobus_softc *sc; 696 697 sc = GPIOBUS_SOFTC(dev); 698 if (pin > sc->sc_npins) 699 return (EINVAL); 700 if (name == NULL) 701 return (EINVAL); 702 /* Save the pin name. */ 703 if (sc->sc_pins[pin].name == NULL) 704 sc->sc_pins[pin].name = malloc(GPIOMAXNAME, M_DEVBUF, 705 M_WAITOK | M_ZERO); 706 strlcpy(sc->sc_pins[pin].name, name, GPIOMAXNAME); 707 708 return (0); 709 } 710 711 static device_method_t gpiobus_methods[] = { 712 /* Device interface */ 713 DEVMETHOD(device_probe, gpiobus_probe), 714 DEVMETHOD(device_attach, gpiobus_attach), 715 DEVMETHOD(device_detach, gpiobus_detach), 716 DEVMETHOD(device_shutdown, bus_generic_shutdown), 717 DEVMETHOD(device_suspend, gpiobus_suspend), 718 DEVMETHOD(device_resume, gpiobus_resume), 719 720 /* Bus interface */ 721 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 722 DEVMETHOD(bus_config_intr, bus_generic_config_intr), 723 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 724 DEVMETHOD(bus_set_resource, gpiobus_set_resource), 725 DEVMETHOD(bus_alloc_resource, gpiobus_alloc_resource), 726 DEVMETHOD(bus_release_resource, gpiobus_release_resource), 727 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 728 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 729 DEVMETHOD(bus_get_resource_list, gpiobus_get_resource_list), 730 DEVMETHOD(bus_add_child, gpiobus_add_child), 731 DEVMETHOD(bus_probe_nomatch, gpiobus_probe_nomatch), 732 DEVMETHOD(bus_print_child, gpiobus_print_child), 733 DEVMETHOD(bus_child_pnpinfo_str, gpiobus_child_pnpinfo_str), 734 DEVMETHOD(bus_child_location_str, gpiobus_child_location_str), 735 DEVMETHOD(bus_hinted_child, gpiobus_hinted_child), 736 737 /* GPIO protocol */ 738 DEVMETHOD(gpiobus_acquire_bus, gpiobus_acquire_bus), 739 DEVMETHOD(gpiobus_release_bus, gpiobus_release_bus), 740 DEVMETHOD(gpiobus_pin_getflags, gpiobus_pin_getflags), 741 DEVMETHOD(gpiobus_pin_getcaps, gpiobus_pin_getcaps), 742 DEVMETHOD(gpiobus_pin_setflags, gpiobus_pin_setflags), 743 DEVMETHOD(gpiobus_pin_get, gpiobus_pin_get), 744 DEVMETHOD(gpiobus_pin_set, gpiobus_pin_set), 745 DEVMETHOD(gpiobus_pin_toggle, gpiobus_pin_toggle), 746 DEVMETHOD(gpiobus_pin_getname, gpiobus_pin_getname), 747 DEVMETHOD(gpiobus_pin_setname, gpiobus_pin_setname), 748 749 DEVMETHOD_END 750 }; 751 752 driver_t gpiobus_driver = { 753 "gpiobus", 754 gpiobus_methods, 755 sizeof(struct gpiobus_softc) 756 }; 757 758 devclass_t gpiobus_devclass; 759 760 DRIVER_MODULE(gpiobus, gpio, gpiobus_driver, gpiobus_devclass, 0, 0); 761 MODULE_VERSION(gpiobus, 1); 762