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/intr.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/module.h> 38 39 #include <dev/gpio/gpiobusvar.h> 40 41 #include "gpiobus_if.h" 42 43 #undef GPIOBUS_DEBUG 44 #ifdef GPIOBUS_DEBUG 45 #define dprintf printf 46 #else 47 #define dprintf(x, arg...) 48 #endif 49 50 static void gpiobus_print_pins(struct gpiobus_ivar *, char *, size_t); 51 static int gpiobus_parse_pins(struct gpiobus_softc *, device_t, int); 52 static int gpiobus_probe(device_t); 53 static int gpiobus_attach(device_t); 54 static int gpiobus_detach(device_t); 55 static int gpiobus_suspend(device_t); 56 static int gpiobus_resume(device_t); 57 static void gpiobus_probe_nomatch(device_t, device_t); 58 static int gpiobus_print_child(device_t, device_t); 59 static int gpiobus_child_location_str(device_t, device_t, char *, size_t); 60 static int gpiobus_child_pnpinfo_str(device_t, device_t, char *, size_t); 61 static device_t gpiobus_add_child(device_t, u_int, const char *, int); 62 static void gpiobus_hinted_child(device_t, const char *, int); 63 64 /* 65 * GPIOBUS interface 66 */ 67 static int gpiobus_acquire_bus(device_t, device_t, int); 68 static void gpiobus_release_bus(device_t, device_t); 69 static int gpiobus_pin_setflags(device_t, device_t, uint32_t, uint32_t); 70 static int gpiobus_pin_getflags(device_t, device_t, uint32_t, uint32_t*); 71 static int gpiobus_pin_getcaps(device_t, device_t, uint32_t, uint32_t*); 72 static int gpiobus_pin_set(device_t, device_t, uint32_t, unsigned int); 73 static int gpiobus_pin_get(device_t, device_t, uint32_t, unsigned int*); 74 static int gpiobus_pin_toggle(device_t, device_t, uint32_t); 75 76 /* 77 * XXX -> Move me to better place - gpio_subr.c? 78 * Also, this function must be changed when interrupt configuration 79 * data will be moved into struct resource. 80 */ 81 #ifdef INTRNG 82 struct resource * 83 gpio_alloc_intr_resource(device_t consumer_dev, int *rid, u_int alloc_flags, 84 gpio_pin_t pin, uint32_t intr_mode) 85 { 86 u_int irqnum; 87 88 /* 89 * Allocate new fictitious interrupt number and store configuration 90 * into it. 91 */ 92 irqnum = intr_gpio_map_irq(pin->dev, pin->pin, pin->flags, intr_mode); 93 if (irqnum == INTR_IRQ_INVALID) 94 return (NULL); 95 96 return (bus_alloc_resource(consumer_dev, SYS_RES_IRQ, rid, 97 irqnum, irqnum, 1, alloc_flags)); 98 } 99 #else 100 struct resource * 101 gpio_alloc_intr_resource(device_t consumer_dev, int *rid, u_int alloc_flags, 102 gpio_pin_t pin, uint32_t intr_mode) 103 { 104 105 return (NULL); 106 } 107 #endif 108 109 int 110 gpio_check_flags(uint32_t caps, uint32_t flags) 111 { 112 113 /* Check for unwanted flags. */ 114 if ((flags & caps) == 0 || (flags & caps) != flags) 115 return (EINVAL); 116 /* Cannot mix input/output together. */ 117 if (flags & GPIO_PIN_INPUT && flags & GPIO_PIN_OUTPUT) 118 return (EINVAL); 119 /* Cannot mix pull-up/pull-down together. */ 120 if (flags & GPIO_PIN_PULLUP && flags & GPIO_PIN_PULLDOWN) 121 return (EINVAL); 122 123 return (0); 124 } 125 126 static void 127 gpiobus_print_pins(struct gpiobus_ivar *devi, char *buf, size_t buflen) 128 { 129 char tmp[128]; 130 int i, range_start, range_stop, need_coma; 131 132 if (devi->npins == 0) 133 return; 134 135 need_coma = 0; 136 range_start = range_stop = devi->pins[0]; 137 for (i = 1; i < devi->npins; i++) { 138 if (devi->pins[i] != (range_stop + 1)) { 139 if (need_coma) 140 strlcat(buf, ",", buflen); 141 memset(tmp, 0, sizeof(tmp)); 142 if (range_start != range_stop) 143 snprintf(tmp, sizeof(tmp) - 1, "%d-%d", 144 range_start, range_stop); 145 else 146 snprintf(tmp, sizeof(tmp) - 1, "%d", 147 range_start); 148 strlcat(buf, tmp, buflen); 149 150 range_start = range_stop = devi->pins[i]; 151 need_coma = 1; 152 } 153 else 154 range_stop++; 155 } 156 157 if (need_coma) 158 strlcat(buf, ",", buflen); 159 memset(tmp, 0, sizeof(tmp)); 160 if (range_start != range_stop) 161 snprintf(tmp, sizeof(tmp) - 1, "%d-%d", 162 range_start, range_stop); 163 else 164 snprintf(tmp, sizeof(tmp) - 1, "%d", 165 range_start); 166 strlcat(buf, tmp, buflen); 167 } 168 169 device_t 170 gpiobus_attach_bus(device_t dev) 171 { 172 device_t busdev; 173 174 busdev = device_add_child(dev, "gpiobus", -1); 175 if (busdev == NULL) 176 return (NULL); 177 if (device_add_child(dev, "gpioc", -1) == NULL) { 178 device_delete_child(dev, busdev); 179 return (NULL); 180 } 181 #ifdef FDT 182 ofw_gpiobus_register_provider(dev); 183 #endif 184 bus_generic_attach(dev); 185 186 return (busdev); 187 } 188 189 int 190 gpiobus_detach_bus(device_t dev) 191 { 192 int err; 193 194 #ifdef FDT 195 ofw_gpiobus_unregister_provider(dev); 196 #endif 197 err = bus_generic_detach(dev); 198 if (err != 0) 199 return (err); 200 201 return (device_delete_children(dev)); 202 } 203 204 int 205 gpiobus_init_softc(device_t dev) 206 { 207 struct gpiobus_softc *sc; 208 209 sc = GPIOBUS_SOFTC(dev); 210 sc->sc_busdev = dev; 211 sc->sc_dev = device_get_parent(dev); 212 sc->sc_intr_rman.rm_type = RMAN_ARRAY; 213 sc->sc_intr_rman.rm_descr = "GPIO Interrupts"; 214 if (rman_init(&sc->sc_intr_rman) != 0 || 215 rman_manage_region(&sc->sc_intr_rman, 0, ~0) != 0) 216 panic("%s: failed to set up rman.", __func__); 217 218 if (GPIO_PIN_MAX(sc->sc_dev, &sc->sc_npins) != 0) 219 return (ENXIO); 220 221 KASSERT(sc->sc_npins >= 0, ("GPIO device with no pins")); 222 223 /* Pins = GPIO_PIN_MAX() + 1 */ 224 sc->sc_npins++; 225 226 sc->sc_pins = malloc(sizeof(*sc->sc_pins) * sc->sc_npins, M_DEVBUF, 227 M_NOWAIT | M_ZERO); 228 if (sc->sc_pins == NULL) 229 return (ENOMEM); 230 231 /* Initialize the bus lock. */ 232 GPIOBUS_LOCK_INIT(sc); 233 234 return (0); 235 } 236 237 int 238 gpiobus_alloc_ivars(struct gpiobus_ivar *devi) 239 { 240 241 /* Allocate pins and flags memory. */ 242 devi->pins = malloc(sizeof(uint32_t) * devi->npins, M_DEVBUF, 243 M_NOWAIT | M_ZERO); 244 if (devi->pins == NULL) 245 return (ENOMEM); 246 devi->flags = malloc(sizeof(uint32_t) * devi->npins, M_DEVBUF, 247 M_NOWAIT | M_ZERO); 248 if (devi->flags == NULL) { 249 free(devi->pins, M_DEVBUF); 250 return (ENOMEM); 251 } 252 253 return (0); 254 } 255 256 void 257 gpiobus_free_ivars(struct gpiobus_ivar *devi) 258 { 259 260 if (devi->flags) { 261 free(devi->flags, M_DEVBUF); 262 devi->flags = NULL; 263 } 264 if (devi->pins) { 265 free(devi->pins, M_DEVBUF); 266 devi->pins = NULL; 267 } 268 } 269 270 int 271 gpiobus_acquire_pin(device_t bus, uint32_t pin) 272 { 273 struct gpiobus_softc *sc; 274 275 sc = device_get_softc(bus); 276 /* Consistency check. */ 277 if (pin >= sc->sc_npins) { 278 device_printf(bus, 279 "invalid pin %d, max: %d\n", pin, sc->sc_npins - 1); 280 return (-1); 281 } 282 /* Mark pin as mapped and give warning if it's already mapped. */ 283 if (sc->sc_pins[pin].mapped) { 284 device_printf(bus, "warning: pin %d is already mapped\n", pin); 285 return (-1); 286 } 287 sc->sc_pins[pin].mapped = 1; 288 289 return (0); 290 } 291 292 /* Release mapped pin */ 293 int 294 gpiobus_release_pin(device_t bus, uint32_t pin) 295 { 296 struct gpiobus_softc *sc; 297 298 sc = device_get_softc(bus); 299 /* Consistency check. */ 300 if (pin >= sc->sc_npins) { 301 device_printf(bus, 302 "gpiobus_acquire_pin: invalid pin %d, max=%d\n", 303 pin, sc->sc_npins - 1); 304 return (-1); 305 } 306 307 if (!sc->sc_pins[pin].mapped) { 308 device_printf(bus, "gpiobus_acquire_pin: pin %d is not mapped\n", pin); 309 return (-1); 310 } 311 sc->sc_pins[pin].mapped = 0; 312 313 return (0); 314 } 315 316 static int 317 gpiobus_parse_pins(struct gpiobus_softc *sc, device_t child, int mask) 318 { 319 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 320 int i, npins; 321 322 npins = 0; 323 for (i = 0; i < 32; i++) { 324 if (mask & (1 << i)) 325 npins++; 326 } 327 if (npins == 0) { 328 device_printf(child, "empty pin mask\n"); 329 return (EINVAL); 330 } 331 devi->npins = npins; 332 if (gpiobus_alloc_ivars(devi) != 0) { 333 device_printf(child, "cannot allocate device ivars\n"); 334 return (EINVAL); 335 } 336 npins = 0; 337 for (i = 0; i < 32; i++) { 338 if ((mask & (1 << i)) == 0) 339 continue; 340 /* Reserve the GPIO pin. */ 341 if (gpiobus_acquire_pin(sc->sc_busdev, i) != 0) { 342 gpiobus_free_ivars(devi); 343 return (EINVAL); 344 } 345 devi->pins[npins++] = i; 346 /* Use the child name as pin name. */ 347 GPIOBUS_PIN_SETNAME(sc->sc_busdev, i, 348 device_get_nameunit(child)); 349 } 350 351 return (0); 352 } 353 354 static int 355 gpiobus_probe(device_t dev) 356 { 357 device_set_desc(dev, "GPIO bus"); 358 359 return (BUS_PROBE_GENERIC); 360 } 361 362 static int 363 gpiobus_attach(device_t dev) 364 { 365 int err; 366 367 err = gpiobus_init_softc(dev); 368 if (err != 0) 369 return (err); 370 371 /* 372 * Get parent's pins and mark them as unmapped 373 */ 374 bus_generic_probe(dev); 375 bus_enumerate_hinted_children(dev); 376 377 return (bus_generic_attach(dev)); 378 } 379 380 /* 381 * Since this is not a self-enumerating bus, and since we always add 382 * children in attach, we have to always delete children here. 383 */ 384 static int 385 gpiobus_detach(device_t dev) 386 { 387 struct gpiobus_softc *sc; 388 struct gpiobus_ivar *devi; 389 device_t *devlist; 390 int i, err, ndevs; 391 392 sc = GPIOBUS_SOFTC(dev); 393 KASSERT(mtx_initialized(&sc->sc_mtx), 394 ("gpiobus mutex not initialized")); 395 GPIOBUS_LOCK_DESTROY(sc); 396 397 if ((err = bus_generic_detach(dev)) != 0) 398 return (err); 399 400 if ((err = device_get_children(dev, &devlist, &ndevs)) != 0) 401 return (err); 402 for (i = 0; i < ndevs; i++) { 403 devi = GPIOBUS_IVAR(devlist[i]); 404 gpiobus_free_ivars(devi); 405 resource_list_free(&devi->rl); 406 free(devi, M_DEVBUF); 407 device_delete_child(dev, devlist[i]); 408 } 409 free(devlist, M_TEMP); 410 rman_fini(&sc->sc_intr_rman); 411 if (sc->sc_pins) { 412 for (i = 0; i < sc->sc_npins; i++) { 413 if (sc->sc_pins[i].name != NULL) 414 free(sc->sc_pins[i].name, M_DEVBUF); 415 sc->sc_pins[i].name = NULL; 416 } 417 free(sc->sc_pins, M_DEVBUF); 418 sc->sc_pins = NULL; 419 } 420 421 return (0); 422 } 423 424 static int 425 gpiobus_suspend(device_t dev) 426 { 427 428 return (bus_generic_suspend(dev)); 429 } 430 431 static int 432 gpiobus_resume(device_t dev) 433 { 434 435 return (bus_generic_resume(dev)); 436 } 437 438 static void 439 gpiobus_probe_nomatch(device_t dev, device_t child) 440 { 441 char pins[128]; 442 struct gpiobus_ivar *devi; 443 444 devi = GPIOBUS_IVAR(child); 445 memset(pins, 0, sizeof(pins)); 446 gpiobus_print_pins(devi, pins, sizeof(pins)); 447 if (devi->npins > 1) 448 device_printf(dev, "<unknown device> at pins %s", pins); 449 else 450 device_printf(dev, "<unknown device> at pin %s", pins); 451 resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%jd"); 452 printf("\n"); 453 } 454 455 static int 456 gpiobus_print_child(device_t dev, device_t child) 457 { 458 char pins[128]; 459 int retval = 0; 460 struct gpiobus_ivar *devi; 461 462 devi = GPIOBUS_IVAR(child); 463 memset(pins, 0, sizeof(pins)); 464 retval += bus_print_child_header(dev, child); 465 if (devi->npins > 0) { 466 if (devi->npins > 1) 467 retval += printf(" at pins "); 468 else 469 retval += printf(" at pin "); 470 gpiobus_print_pins(devi, pins, sizeof(pins)); 471 retval += printf("%s", pins); 472 } 473 resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%jd"); 474 retval += bus_print_child_footer(dev, child); 475 476 return (retval); 477 } 478 479 static int 480 gpiobus_child_location_str(device_t bus, device_t child, char *buf, 481 size_t buflen) 482 { 483 struct gpiobus_ivar *devi; 484 485 devi = GPIOBUS_IVAR(child); 486 if (devi->npins > 1) 487 strlcpy(buf, "pins=", buflen); 488 else 489 strlcpy(buf, "pin=", buflen); 490 gpiobus_print_pins(devi, buf, buflen); 491 492 return (0); 493 } 494 495 static int 496 gpiobus_child_pnpinfo_str(device_t bus, device_t child, char *buf, 497 size_t buflen) 498 { 499 500 *buf = '\0'; 501 return (0); 502 } 503 504 static device_t 505 gpiobus_add_child(device_t dev, u_int order, const char *name, int unit) 506 { 507 device_t child; 508 struct gpiobus_ivar *devi; 509 510 child = device_add_child_ordered(dev, order, name, unit); 511 if (child == NULL) 512 return (child); 513 devi = malloc(sizeof(struct gpiobus_ivar), M_DEVBUF, M_NOWAIT | M_ZERO); 514 if (devi == NULL) { 515 device_delete_child(dev, child); 516 return (NULL); 517 } 518 resource_list_init(&devi->rl); 519 device_set_ivars(child, devi); 520 521 return (child); 522 } 523 524 static void 525 gpiobus_hinted_child(device_t bus, const char *dname, int dunit) 526 { 527 struct gpiobus_softc *sc = GPIOBUS_SOFTC(bus); 528 struct gpiobus_ivar *devi; 529 device_t child; 530 int irq, pins; 531 532 child = BUS_ADD_CHILD(bus, 0, dname, dunit); 533 devi = GPIOBUS_IVAR(child); 534 resource_int_value(dname, dunit, "pins", &pins); 535 if (gpiobus_parse_pins(sc, child, pins)) { 536 resource_list_free(&devi->rl); 537 free(devi, M_DEVBUF); 538 device_delete_child(bus, child); 539 } 540 if (resource_int_value(dname, dunit, "irq", &irq) == 0) { 541 if (bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1) != 0) 542 device_printf(bus, 543 "warning: bus_set_resource() failed\n"); 544 } 545 } 546 547 static int 548 gpiobus_set_resource(device_t dev, device_t child, int type, int rid, 549 rman_res_t start, rman_res_t count) 550 { 551 struct gpiobus_ivar *devi; 552 struct resource_list_entry *rle; 553 554 dprintf("%s: entry (%p, %p, %d, %d, %p, %ld)\n", 555 __func__, dev, child, type, rid, (void *)(intptr_t)start, count); 556 devi = GPIOBUS_IVAR(child); 557 rle = resource_list_add(&devi->rl, type, rid, start, 558 start + count - 1, count); 559 if (rle == NULL) 560 return (ENXIO); 561 562 return (0); 563 } 564 565 static struct resource * 566 gpiobus_alloc_resource(device_t bus, device_t child, int type, int *rid, 567 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 568 { 569 struct gpiobus_softc *sc; 570 struct resource *rv; 571 struct resource_list *rl; 572 struct resource_list_entry *rle; 573 int isdefault; 574 575 if (type != SYS_RES_IRQ) 576 return (NULL); 577 isdefault = (RMAN_IS_DEFAULT_RANGE(start, end) && count == 1); 578 rle = NULL; 579 if (isdefault) { 580 rl = BUS_GET_RESOURCE_LIST(bus, child); 581 if (rl == NULL) 582 return (NULL); 583 rle = resource_list_find(rl, type, *rid); 584 if (rle == NULL) 585 return (NULL); 586 if (rle->res != NULL) 587 panic("%s: resource entry is busy", __func__); 588 start = rle->start; 589 count = rle->count; 590 end = rle->end; 591 } 592 sc = device_get_softc(bus); 593 rv = rman_reserve_resource(&sc->sc_intr_rman, start, end, count, flags, 594 child); 595 if (rv == NULL) 596 return (NULL); 597 rman_set_rid(rv, *rid); 598 if ((flags & RF_ACTIVE) != 0 && 599 bus_activate_resource(child, type, *rid, rv) != 0) { 600 rman_release_resource(rv); 601 return (NULL); 602 } 603 604 return (rv); 605 } 606 607 static int 608 gpiobus_release_resource(device_t bus __unused, device_t child, int type, 609 int rid, struct resource *r) 610 { 611 int error; 612 613 if (rman_get_flags(r) & RF_ACTIVE) { 614 error = bus_deactivate_resource(child, type, rid, r); 615 if (error) 616 return (error); 617 } 618 619 return (rman_release_resource(r)); 620 } 621 622 static struct resource_list * 623 gpiobus_get_resource_list(device_t bus __unused, device_t child) 624 { 625 struct gpiobus_ivar *ivar; 626 627 ivar = GPIOBUS_IVAR(child); 628 629 return (&ivar->rl); 630 } 631 632 static int 633 gpiobus_acquire_bus(device_t busdev, device_t child, int how) 634 { 635 struct gpiobus_softc *sc; 636 637 sc = device_get_softc(busdev); 638 GPIOBUS_ASSERT_UNLOCKED(sc); 639 GPIOBUS_LOCK(sc); 640 if (sc->sc_owner != NULL) { 641 if (sc->sc_owner == child) 642 panic("%s: %s still owns the bus.", 643 device_get_nameunit(busdev), 644 device_get_nameunit(child)); 645 if (how == GPIOBUS_DONTWAIT) { 646 GPIOBUS_UNLOCK(sc); 647 return (EWOULDBLOCK); 648 } 649 while (sc->sc_owner != NULL) 650 mtx_sleep(sc, &sc->sc_mtx, 0, "gpiobuswait", 0); 651 } 652 sc->sc_owner = child; 653 GPIOBUS_UNLOCK(sc); 654 655 return (0); 656 } 657 658 static void 659 gpiobus_release_bus(device_t busdev, device_t child) 660 { 661 struct gpiobus_softc *sc; 662 663 sc = device_get_softc(busdev); 664 GPIOBUS_ASSERT_UNLOCKED(sc); 665 GPIOBUS_LOCK(sc); 666 if (sc->sc_owner == NULL) 667 panic("%s: %s releasing unowned bus.", 668 device_get_nameunit(busdev), 669 device_get_nameunit(child)); 670 if (sc->sc_owner != child) 671 panic("%s: %s trying to release bus owned by %s", 672 device_get_nameunit(busdev), 673 device_get_nameunit(child), 674 device_get_nameunit(sc->sc_owner)); 675 sc->sc_owner = NULL; 676 wakeup(sc); 677 GPIOBUS_UNLOCK(sc); 678 } 679 680 static int 681 gpiobus_pin_setflags(device_t dev, device_t child, uint32_t pin, 682 uint32_t flags) 683 { 684 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); 685 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 686 uint32_t caps; 687 688 if (pin >= devi->npins) 689 return (EINVAL); 690 if (GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], &caps) != 0) 691 return (EINVAL); 692 if (gpio_check_flags(caps, flags) != 0) 693 return (EINVAL); 694 695 return (GPIO_PIN_SETFLAGS(sc->sc_dev, devi->pins[pin], flags)); 696 } 697 698 static int 699 gpiobus_pin_getflags(device_t dev, device_t child, uint32_t pin, 700 uint32_t *flags) 701 { 702 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); 703 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 704 705 if (pin >= devi->npins) 706 return (EINVAL); 707 708 return GPIO_PIN_GETFLAGS(sc->sc_dev, devi->pins[pin], flags); 709 } 710 711 static int 712 gpiobus_pin_getcaps(device_t dev, device_t child, uint32_t pin, 713 uint32_t *caps) 714 { 715 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); 716 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 717 718 if (pin >= devi->npins) 719 return (EINVAL); 720 721 return GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], caps); 722 } 723 724 static int 725 gpiobus_pin_set(device_t dev, device_t child, uint32_t pin, 726 unsigned int value) 727 { 728 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); 729 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 730 731 if (pin >= devi->npins) 732 return (EINVAL); 733 734 return GPIO_PIN_SET(sc->sc_dev, devi->pins[pin], value); 735 } 736 737 static int 738 gpiobus_pin_get(device_t dev, device_t child, uint32_t pin, 739 unsigned int *value) 740 { 741 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); 742 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 743 744 if (pin >= devi->npins) 745 return (EINVAL); 746 747 return GPIO_PIN_GET(sc->sc_dev, devi->pins[pin], value); 748 } 749 750 static int 751 gpiobus_pin_toggle(device_t dev, device_t child, uint32_t pin) 752 { 753 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); 754 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); 755 756 if (pin >= devi->npins) 757 return (EINVAL); 758 759 return GPIO_PIN_TOGGLE(sc->sc_dev, devi->pins[pin]); 760 } 761 762 static int 763 gpiobus_pin_getname(device_t dev, uint32_t pin, char *name) 764 { 765 struct gpiobus_softc *sc; 766 767 sc = GPIOBUS_SOFTC(dev); 768 if (pin > sc->sc_npins) 769 return (EINVAL); 770 /* Did we have a name for this pin ? */ 771 if (sc->sc_pins[pin].name != NULL) { 772 memcpy(name, sc->sc_pins[pin].name, GPIOMAXNAME); 773 return (0); 774 } 775 776 /* Return the default pin name. */ 777 return (GPIO_PIN_GETNAME(device_get_parent(dev), pin, name)); 778 } 779 780 static int 781 gpiobus_pin_setname(device_t dev, uint32_t pin, const char *name) 782 { 783 struct gpiobus_softc *sc; 784 785 sc = GPIOBUS_SOFTC(dev); 786 if (pin > sc->sc_npins) 787 return (EINVAL); 788 if (name == NULL) 789 return (EINVAL); 790 /* Save the pin name. */ 791 if (sc->sc_pins[pin].name == NULL) 792 sc->sc_pins[pin].name = malloc(GPIOMAXNAME, M_DEVBUF, 793 M_WAITOK | M_ZERO); 794 strlcpy(sc->sc_pins[pin].name, name, GPIOMAXNAME); 795 796 return (0); 797 } 798 799 static device_method_t gpiobus_methods[] = { 800 /* Device interface */ 801 DEVMETHOD(device_probe, gpiobus_probe), 802 DEVMETHOD(device_attach, gpiobus_attach), 803 DEVMETHOD(device_detach, gpiobus_detach), 804 DEVMETHOD(device_shutdown, bus_generic_shutdown), 805 DEVMETHOD(device_suspend, gpiobus_suspend), 806 DEVMETHOD(device_resume, gpiobus_resume), 807 808 /* Bus interface */ 809 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 810 DEVMETHOD(bus_config_intr, bus_generic_config_intr), 811 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 812 DEVMETHOD(bus_set_resource, gpiobus_set_resource), 813 DEVMETHOD(bus_alloc_resource, gpiobus_alloc_resource), 814 DEVMETHOD(bus_release_resource, gpiobus_release_resource), 815 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 816 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 817 DEVMETHOD(bus_get_resource_list, gpiobus_get_resource_list), 818 DEVMETHOD(bus_add_child, gpiobus_add_child), 819 DEVMETHOD(bus_probe_nomatch, gpiobus_probe_nomatch), 820 DEVMETHOD(bus_print_child, gpiobus_print_child), 821 DEVMETHOD(bus_child_pnpinfo_str, gpiobus_child_pnpinfo_str), 822 DEVMETHOD(bus_child_location_str, gpiobus_child_location_str), 823 DEVMETHOD(bus_hinted_child, gpiobus_hinted_child), 824 825 /* GPIO protocol */ 826 DEVMETHOD(gpiobus_acquire_bus, gpiobus_acquire_bus), 827 DEVMETHOD(gpiobus_release_bus, gpiobus_release_bus), 828 DEVMETHOD(gpiobus_pin_getflags, gpiobus_pin_getflags), 829 DEVMETHOD(gpiobus_pin_getcaps, gpiobus_pin_getcaps), 830 DEVMETHOD(gpiobus_pin_setflags, gpiobus_pin_setflags), 831 DEVMETHOD(gpiobus_pin_get, gpiobus_pin_get), 832 DEVMETHOD(gpiobus_pin_set, gpiobus_pin_set), 833 DEVMETHOD(gpiobus_pin_toggle, gpiobus_pin_toggle), 834 DEVMETHOD(gpiobus_pin_getname, gpiobus_pin_getname), 835 DEVMETHOD(gpiobus_pin_setname, gpiobus_pin_setname), 836 837 DEVMETHOD_END 838 }; 839 840 driver_t gpiobus_driver = { 841 "gpiobus", 842 gpiobus_methods, 843 sizeof(struct gpiobus_softc) 844 }; 845 846 devclass_t gpiobus_devclass; 847 848 DRIVER_MODULE(gpiobus, gpio, gpiobus_driver, gpiobus_devclass, 0, 0); 849 MODULE_VERSION(gpiobus, 1); 850