2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2009 Oleksandr Tymoshenko <gonzo@freebsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/malloc.h>
41 #include <sys/module.h>
43 #include <dev/gpio/gpiobusvar.h>
45 #include "gpiobus_if.h"
49 #define dprintf printf
51 #define dprintf(x, arg...)
54 static void gpiobus_print_pins(struct gpiobus_ivar *, char *, size_t);
55 static int gpiobus_parse_pins(struct gpiobus_softc *, device_t, int);
56 static int gpiobus_probe(device_t);
57 static int gpiobus_attach(device_t);
58 static int gpiobus_detach(device_t);
59 static int gpiobus_suspend(device_t);
60 static int gpiobus_resume(device_t);
61 static void gpiobus_probe_nomatch(device_t, device_t);
62 static int gpiobus_print_child(device_t, device_t);
63 static int gpiobus_child_location_str(device_t, device_t, char *, size_t);
64 static int gpiobus_child_pnpinfo_str(device_t, device_t, char *, size_t);
65 static device_t gpiobus_add_child(device_t, u_int, const char *, int);
66 static void gpiobus_hinted_child(device_t, const char *, int);
71 static int gpiobus_acquire_bus(device_t, device_t, int);
72 static void gpiobus_release_bus(device_t, device_t);
73 static int gpiobus_pin_setflags(device_t, device_t, uint32_t, uint32_t);
74 static int gpiobus_pin_getflags(device_t, device_t, uint32_t, uint32_t*);
75 static int gpiobus_pin_getcaps(device_t, device_t, uint32_t, uint32_t*);
76 static int gpiobus_pin_set(device_t, device_t, uint32_t, unsigned int);
77 static int gpiobus_pin_get(device_t, device_t, uint32_t, unsigned int*);
78 static int gpiobus_pin_toggle(device_t, device_t, uint32_t);
82 * The flags in struct gpiobus_pin are not related to the flags used by the
83 * low-level controller driver in struct gpio_pin. Currently, only pins
84 * acquired via FDT data have gpiobus_pin.flags set, sourced from the flags in
85 * the FDT properties. In theory, these flags are defined per-platform. In
86 * practice they are always the flags from the dt-bindings/gpio/gpio.h file.
87 * The only one of those flags we currently support is for handling active-low
88 * pins, so we just define that flag here instead of including a GPL'd header.
90 #define GPIO_ACTIVE_LOW 1
93 * XXX -> Move me to better place - gpio_subr.c?
94 * Also, this function must be changed when interrupt configuration
95 * data will be moved into struct resource.
100 gpio_alloc_intr_resource(device_t consumer_dev, int *rid, u_int alloc_flags,
101 gpio_pin_t pin, uint32_t intr_mode)
104 struct intr_map_data_gpio *gpio_data;
105 struct resource *res;
107 gpio_data = (struct intr_map_data_gpio *)intr_alloc_map_data(
108 INTR_MAP_DATA_GPIO, sizeof(*gpio_data), M_WAITOK | M_ZERO);
109 gpio_data->gpio_pin_num = pin->pin;
110 gpio_data->gpio_pin_flags = pin->flags;
111 gpio_data->gpio_intr_mode = intr_mode;
113 irq = intr_map_irq(pin->dev, 0, (struct intr_map_data *)gpio_data);
114 res = bus_alloc_resource(consumer_dev, SYS_RES_IRQ, rid, irq, irq, 1,
117 intr_free_intr_map_data((struct intr_map_data *)gpio_data);
120 rman_set_virtual(res, gpio_data);
125 gpio_alloc_intr_resource(device_t consumer_dev, int *rid, u_int alloc_flags,
126 gpio_pin_t pin, uint32_t intr_mode)
134 gpio_check_flags(uint32_t caps, uint32_t flags)
137 /* Filter unwanted flags. */
140 /* Cannot mix input/output together. */
141 if (flags & GPIO_PIN_INPUT && flags & GPIO_PIN_OUTPUT)
143 /* Cannot mix pull-up/pull-down together. */
144 if (flags & GPIO_PIN_PULLUP && flags & GPIO_PIN_PULLDOWN)
146 /* Cannot mix output and interrupt flags together */
147 if (flags & GPIO_PIN_OUTPUT && flags & GPIO_INTR_MASK)
149 /* Only one interrupt flag can be defined at once */
150 if ((flags & GPIO_INTR_MASK) & ((flags & GPIO_INTR_MASK) - 1))
152 /* The interrupt attached flag cannot be set */
153 if (flags & GPIO_INTR_ATTACHED)
160 gpio_pin_get_by_bus_pinnum(device_t busdev, uint32_t pinnum, gpio_pin_t *ppin)
165 err = gpiobus_acquire_pin(busdev, pinnum);
169 pin = malloc(sizeof(*pin), M_DEVBUF, M_WAITOK | M_ZERO);
171 pin->dev = device_get_parent(busdev);
180 gpio_pin_get_by_child_index(device_t childdev, uint32_t idx, gpio_pin_t *ppin)
182 struct gpiobus_ivar *devi;
184 devi = GPIOBUS_IVAR(childdev);
185 if (idx >= devi->npins)
188 return (gpio_pin_get_by_bus_pinnum(device_get_parent(childdev),
189 devi->pins[idx], ppin));
193 gpio_pin_getcaps(gpio_pin_t pin, uint32_t *caps)
196 KASSERT(pin != NULL, ("GPIO pin is NULL."));
197 KASSERT(pin->dev != NULL, ("GPIO pin device is NULL."));
198 return (GPIO_PIN_GETCAPS(pin->dev, pin->pin, caps));
202 gpio_pin_is_active(gpio_pin_t pin, bool *active)
207 KASSERT(pin != NULL, ("GPIO pin is NULL."));
208 KASSERT(pin->dev != NULL, ("GPIO pin device is NULL."));
209 rv = GPIO_PIN_GET(pin->dev, pin->pin, &tmp);
214 if (pin->flags & GPIO_ACTIVE_LOW)
222 gpio_pin_release(gpio_pin_t gpio)
229 KASSERT(gpio->dev != NULL, ("GPIO pin device is NULL."));
231 busdev = GPIO_GET_BUS(gpio->dev);
233 gpiobus_release_pin(busdev, gpio->pin);
235 free(gpio, M_DEVBUF);
239 gpio_pin_set_active(gpio_pin_t pin, bool active)
244 if (pin->flags & GPIO_ACTIVE_LOW)
245 tmp = active ? 0 : 1;
247 tmp = active ? 1 : 0;
249 KASSERT(pin != NULL, ("GPIO pin is NULL."));
250 KASSERT(pin->dev != NULL, ("GPIO pin device is NULL."));
251 rv = GPIO_PIN_SET(pin->dev, pin->pin, tmp);
256 gpio_pin_setflags(gpio_pin_t pin, uint32_t flags)
260 KASSERT(pin != NULL, ("GPIO pin is NULL."));
261 KASSERT(pin->dev != NULL, ("GPIO pin device is NULL."));
263 rv = GPIO_PIN_SETFLAGS(pin->dev, pin->pin, flags);
268 gpiobus_print_pins(struct gpiobus_ivar *devi, char *buf, size_t buflen)
271 int i, range_start, range_stop, need_coma;
273 if (devi->npins == 0)
277 range_start = range_stop = devi->pins[0];
278 for (i = 1; i < devi->npins; i++) {
279 if (devi->pins[i] != (range_stop + 1)) {
281 strlcat(buf, ",", buflen);
282 memset(tmp, 0, sizeof(tmp));
283 if (range_start != range_stop)
284 snprintf(tmp, sizeof(tmp) - 1, "%d-%d",
285 range_start, range_stop);
287 snprintf(tmp, sizeof(tmp) - 1, "%d",
289 strlcat(buf, tmp, buflen);
291 range_start = range_stop = devi->pins[i];
299 strlcat(buf, ",", buflen);
300 memset(tmp, 0, sizeof(tmp));
301 if (range_start != range_stop)
302 snprintf(tmp, sizeof(tmp) - 1, "%d-%d",
303 range_start, range_stop);
305 snprintf(tmp, sizeof(tmp) - 1, "%d",
307 strlcat(buf, tmp, buflen);
311 gpiobus_attach_bus(device_t dev)
315 busdev = device_add_child(dev, "gpiobus", -1);
318 if (device_add_child(dev, "gpioc", -1) == NULL) {
319 device_delete_child(dev, busdev);
323 ofw_gpiobus_register_provider(dev);
325 bus_generic_attach(dev);
331 gpiobus_detach_bus(device_t dev)
336 ofw_gpiobus_unregister_provider(dev);
338 err = bus_generic_detach(dev);
342 return (device_delete_children(dev));
346 gpiobus_init_softc(device_t dev)
348 struct gpiobus_softc *sc;
350 sc = GPIOBUS_SOFTC(dev);
352 sc->sc_dev = device_get_parent(dev);
353 sc->sc_intr_rman.rm_type = RMAN_ARRAY;
354 sc->sc_intr_rman.rm_descr = "GPIO Interrupts";
355 if (rman_init(&sc->sc_intr_rman) != 0 ||
356 rman_manage_region(&sc->sc_intr_rman, 0, ~0) != 0)
357 panic("%s: failed to set up rman.", __func__);
359 if (GPIO_PIN_MAX(sc->sc_dev, &sc->sc_npins) != 0)
362 KASSERT(sc->sc_npins >= 0, ("GPIO device with no pins"));
364 /* Pins = GPIO_PIN_MAX() + 1 */
367 sc->sc_pins = malloc(sizeof(*sc->sc_pins) * sc->sc_npins, M_DEVBUF,
369 if (sc->sc_pins == NULL)
372 /* Initialize the bus lock. */
373 GPIOBUS_LOCK_INIT(sc);
379 gpiobus_alloc_ivars(struct gpiobus_ivar *devi)
382 /* Allocate pins and flags memory. */
383 devi->pins = malloc(sizeof(uint32_t) * devi->npins, M_DEVBUF,
385 if (devi->pins == NULL)
391 gpiobus_free_ivars(struct gpiobus_ivar *devi)
395 free(devi->pins, M_DEVBUF);
402 gpiobus_acquire_pin(device_t bus, uint32_t pin)
404 struct gpiobus_softc *sc;
406 sc = device_get_softc(bus);
407 /* Consistency check. */
408 if (pin >= sc->sc_npins) {
410 "invalid pin %d, max: %d\n", pin, sc->sc_npins - 1);
413 /* Mark pin as mapped and give warning if it's already mapped. */
414 if (sc->sc_pins[pin].mapped) {
415 device_printf(bus, "warning: pin %d is already mapped\n", pin);
418 sc->sc_pins[pin].mapped = 1;
423 /* Release mapped pin */
425 gpiobus_release_pin(device_t bus, uint32_t pin)
427 struct gpiobus_softc *sc;
429 sc = device_get_softc(bus);
430 /* Consistency check. */
431 if (pin >= sc->sc_npins) {
433 "invalid pin %d, max=%d\n",
434 pin, sc->sc_npins - 1);
438 if (!sc->sc_pins[pin].mapped) {
439 device_printf(bus, "pin %d is not mapped\n", pin);
442 sc->sc_pins[pin].mapped = 0;
448 gpiobus_acquire_child_pins(device_t dev, device_t child)
450 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
453 for (i = 0; i < devi->npins; i++) {
454 /* Reserve the GPIO pin. */
455 if (gpiobus_acquire_pin(dev, devi->pins[i]) != 0) {
456 device_printf(child, "cannot acquire pin %d\n",
459 (void)gpiobus_release_pin(dev,
462 gpiobus_free_ivars(devi);
466 for (i = 0; i < devi->npins; i++) {
467 /* Use the child name as pin name. */
468 GPIOBUS_PIN_SETNAME(dev, devi->pins[i],
469 device_get_nameunit(child));
476 gpiobus_parse_pins(struct gpiobus_softc *sc, device_t child, int mask)
478 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
482 for (i = 0; i < 32; i++) {
487 device_printf(child, "empty pin mask\n");
491 if (gpiobus_alloc_ivars(devi) != 0) {
492 device_printf(child, "cannot allocate device ivars\n");
496 for (i = 0; i < 32; i++) {
497 if ((mask & (1 << i)) == 0)
499 devi->pins[npins++] = i;
506 gpiobus_parse_pin_list(struct gpiobus_softc *sc, device_t child,
509 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
518 pin = strtoul(p, &endp, 0);
528 device_printf(child, "garbage in the pin list: %s\n", endp);
532 device_printf(child, "empty pin list\n");
537 if (gpiobus_alloc_ivars(devi) != 0) {
538 device_printf(child, "cannot allocate device ivars\n");
545 pin = strtoul(p, &endp, 0);
559 gpiobus_probe(device_t dev)
561 device_set_desc(dev, "GPIO bus");
563 return (BUS_PROBE_GENERIC);
567 gpiobus_attach(device_t dev)
571 err = gpiobus_init_softc(dev);
576 * Get parent's pins and mark them as unmapped
578 bus_generic_probe(dev);
579 bus_enumerate_hinted_children(dev);
581 return (bus_generic_attach(dev));
585 * Since this is not a self-enumerating bus, and since we always add
586 * children in attach, we have to always delete children here.
589 gpiobus_detach(device_t dev)
591 struct gpiobus_softc *sc;
592 struct gpiobus_ivar *devi;
596 sc = GPIOBUS_SOFTC(dev);
597 KASSERT(mtx_initialized(&sc->sc_mtx),
598 ("gpiobus mutex not initialized"));
599 GPIOBUS_LOCK_DESTROY(sc);
601 if ((err = bus_generic_detach(dev)) != 0)
604 if ((err = device_get_children(dev, &devlist, &ndevs)) != 0)
606 for (i = 0; i < ndevs; i++) {
607 devi = GPIOBUS_IVAR(devlist[i]);
608 gpiobus_free_ivars(devi);
609 resource_list_free(&devi->rl);
610 free(devi, M_DEVBUF);
611 device_delete_child(dev, devlist[i]);
613 free(devlist, M_TEMP);
614 rman_fini(&sc->sc_intr_rman);
616 for (i = 0; i < sc->sc_npins; i++) {
617 if (sc->sc_pins[i].name != NULL)
618 free(sc->sc_pins[i].name, M_DEVBUF);
619 sc->sc_pins[i].name = NULL;
621 free(sc->sc_pins, M_DEVBUF);
629 gpiobus_suspend(device_t dev)
632 return (bus_generic_suspend(dev));
636 gpiobus_resume(device_t dev)
639 return (bus_generic_resume(dev));
643 gpiobus_probe_nomatch(device_t dev, device_t child)
646 struct gpiobus_ivar *devi;
648 devi = GPIOBUS_IVAR(child);
649 memset(pins, 0, sizeof(pins));
650 gpiobus_print_pins(devi, pins, sizeof(pins));
652 device_printf(dev, "<unknown device> at pins %s", pins);
654 device_printf(dev, "<unknown device> at pin %s", pins);
655 resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%jd");
660 gpiobus_print_child(device_t dev, device_t child)
664 struct gpiobus_ivar *devi;
666 devi = GPIOBUS_IVAR(child);
667 memset(pins, 0, sizeof(pins));
668 retval += bus_print_child_header(dev, child);
669 if (devi->npins > 0) {
671 retval += printf(" at pins ");
673 retval += printf(" at pin ");
674 gpiobus_print_pins(devi, pins, sizeof(pins));
675 retval += printf("%s", pins);
677 resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%jd");
678 retval += bus_print_child_footer(dev, child);
684 gpiobus_child_location_str(device_t bus, device_t child, char *buf,
687 struct gpiobus_ivar *devi;
689 devi = GPIOBUS_IVAR(child);
691 strlcpy(buf, "pins=", buflen);
693 strlcpy(buf, "pin=", buflen);
694 gpiobus_print_pins(devi, buf, buflen);
700 gpiobus_child_pnpinfo_str(device_t bus, device_t child, char *buf,
709 gpiobus_add_child(device_t dev, u_int order, const char *name, int unit)
712 struct gpiobus_ivar *devi;
714 child = device_add_child_ordered(dev, order, name, unit);
717 devi = malloc(sizeof(struct gpiobus_ivar), M_DEVBUF, M_NOWAIT | M_ZERO);
719 device_delete_child(dev, child);
722 resource_list_init(&devi->rl);
723 device_set_ivars(child, devi);
729 gpiobus_rescan(device_t dev)
733 * Re-scan is supposed to remove and add children, but if someone has
734 * deleted the hints for a child we attached earlier, we have no easy
735 * way to handle that. So this just attaches new children for whom new
736 * hints or drivers have arrived since we last tried.
738 bus_enumerate_hinted_children(dev);
739 bus_generic_attach(dev);
744 gpiobus_hinted_child(device_t bus, const char *dname, int dunit)
746 struct gpiobus_softc *sc = GPIOBUS_SOFTC(bus);
747 struct gpiobus_ivar *devi;
752 if (device_find_child(bus, dname, dunit) != NULL) {
756 child = BUS_ADD_CHILD(bus, 0, dname, dunit);
757 devi = GPIOBUS_IVAR(child);
758 if (resource_int_value(dname, dunit, "pins", &pinmask) == 0) {
759 if (gpiobus_parse_pins(sc, child, pinmask)) {
760 resource_list_free(&devi->rl);
761 free(devi, M_DEVBUF);
762 device_delete_child(bus, child);
766 else if (resource_string_value(dname, dunit, "pin_list", &pins) == 0) {
767 if (gpiobus_parse_pin_list(sc, child, pins)) {
768 resource_list_free(&devi->rl);
769 free(devi, M_DEVBUF);
770 device_delete_child(bus, child);
774 if (resource_int_value(dname, dunit, "irq", &irq) == 0) {
775 if (bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1) != 0)
777 "warning: bus_set_resource() failed\n");
782 gpiobus_set_resource(device_t dev, device_t child, int type, int rid,
783 rman_res_t start, rman_res_t count)
785 struct gpiobus_ivar *devi;
786 struct resource_list_entry *rle;
788 dprintf("%s: entry (%p, %p, %d, %d, %p, %ld)\n",
789 __func__, dev, child, type, rid, (void *)(intptr_t)start, count);
790 devi = GPIOBUS_IVAR(child);
791 rle = resource_list_add(&devi->rl, type, rid, start,
792 start + count - 1, count);
800 gpiobus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
802 struct gpiobus_ivar *devi;
804 devi = GPIOBUS_IVAR(child);
806 case GPIOBUS_IVAR_NPINS:
807 *result = devi->npins;
809 case GPIOBUS_IVAR_PINS:
810 /* Children do not ever need to directly examine this. */
820 gpiobus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
822 struct gpiobus_ivar *devi;
826 devi = GPIOBUS_IVAR(child);
828 case GPIOBUS_IVAR_NPINS:
829 /* GPIO ivars are set once. */
830 if (devi->npins != 0) {
834 if (gpiobus_alloc_ivars(devi) != 0) {
835 device_printf(child, "cannot allocate device ivars\n");
840 case GPIOBUS_IVAR_PINS:
841 ptr = (const uint32_t *)value;
842 for (i = 0; i < devi->npins; i++)
843 devi->pins[i] = ptr[i];
844 if (gpiobus_acquire_child_pins(dev, child) != 0)
854 static struct resource *
855 gpiobus_alloc_resource(device_t bus, device_t child, int type, int *rid,
856 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
858 struct gpiobus_softc *sc;
860 struct resource_list *rl;
861 struct resource_list_entry *rle;
864 if (type != SYS_RES_IRQ)
866 isdefault = (RMAN_IS_DEFAULT_RANGE(start, end) && count == 1);
869 rl = BUS_GET_RESOURCE_LIST(bus, child);
872 rle = resource_list_find(rl, type, *rid);
875 if (rle->res != NULL)
876 panic("%s: resource entry is busy", __func__);
881 sc = device_get_softc(bus);
882 rv = rman_reserve_resource(&sc->sc_intr_rman, start, end, count, flags,
886 rman_set_rid(rv, *rid);
887 if ((flags & RF_ACTIVE) != 0 &&
888 bus_activate_resource(child, type, *rid, rv) != 0) {
889 rman_release_resource(rv);
897 gpiobus_release_resource(device_t bus __unused, device_t child, int type,
898 int rid, struct resource *r)
902 if (rman_get_flags(r) & RF_ACTIVE) {
903 error = bus_deactivate_resource(child, type, rid, r);
908 return (rman_release_resource(r));
911 static struct resource_list *
912 gpiobus_get_resource_list(device_t bus __unused, device_t child)
914 struct gpiobus_ivar *ivar;
916 ivar = GPIOBUS_IVAR(child);
922 gpiobus_acquire_bus(device_t busdev, device_t child, int how)
924 struct gpiobus_softc *sc;
926 sc = device_get_softc(busdev);
927 GPIOBUS_ASSERT_UNLOCKED(sc);
929 if (sc->sc_owner != NULL) {
930 if (sc->sc_owner == child)
931 panic("%s: %s still owns the bus.",
932 device_get_nameunit(busdev),
933 device_get_nameunit(child));
934 if (how == GPIOBUS_DONTWAIT) {
936 return (EWOULDBLOCK);
938 while (sc->sc_owner != NULL)
939 mtx_sleep(sc, &sc->sc_mtx, 0, "gpiobuswait", 0);
941 sc->sc_owner = child;
948 gpiobus_release_bus(device_t busdev, device_t child)
950 struct gpiobus_softc *sc;
952 sc = device_get_softc(busdev);
953 GPIOBUS_ASSERT_UNLOCKED(sc);
955 if (sc->sc_owner == NULL)
956 panic("%s: %s releasing unowned bus.",
957 device_get_nameunit(busdev),
958 device_get_nameunit(child));
959 if (sc->sc_owner != child)
960 panic("%s: %s trying to release bus owned by %s",
961 device_get_nameunit(busdev),
962 device_get_nameunit(child),
963 device_get_nameunit(sc->sc_owner));
970 gpiobus_pin_setflags(device_t dev, device_t child, uint32_t pin,
973 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
974 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
977 if (pin >= devi->npins)
979 if (GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], &caps) != 0)
981 if (gpio_check_flags(caps, flags) != 0)
984 return (GPIO_PIN_SETFLAGS(sc->sc_dev, devi->pins[pin], flags));
988 gpiobus_pin_getflags(device_t dev, device_t child, uint32_t pin,
991 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
992 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
994 if (pin >= devi->npins)
997 return GPIO_PIN_GETFLAGS(sc->sc_dev, devi->pins[pin], flags);
1001 gpiobus_pin_getcaps(device_t dev, device_t child, uint32_t pin,
1004 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
1005 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
1007 if (pin >= devi->npins)
1010 return GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], caps);
1014 gpiobus_pin_set(device_t dev, device_t child, uint32_t pin,
1017 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
1018 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
1020 if (pin >= devi->npins)
1023 return GPIO_PIN_SET(sc->sc_dev, devi->pins[pin], value);
1027 gpiobus_pin_get(device_t dev, device_t child, uint32_t pin,
1028 unsigned int *value)
1030 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
1031 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
1033 if (pin >= devi->npins)
1036 return GPIO_PIN_GET(sc->sc_dev, devi->pins[pin], value);
1040 gpiobus_pin_toggle(device_t dev, device_t child, uint32_t pin)
1042 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
1043 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
1045 if (pin >= devi->npins)
1048 return GPIO_PIN_TOGGLE(sc->sc_dev, devi->pins[pin]);
1052 gpiobus_pin_getname(device_t dev, uint32_t pin, char *name)
1054 struct gpiobus_softc *sc;
1056 sc = GPIOBUS_SOFTC(dev);
1057 if (pin > sc->sc_npins)
1059 /* Did we have a name for this pin ? */
1060 if (sc->sc_pins[pin].name != NULL) {
1061 memcpy(name, sc->sc_pins[pin].name, GPIOMAXNAME);
1065 /* Return the default pin name. */
1066 return (GPIO_PIN_GETNAME(device_get_parent(dev), pin, name));
1070 gpiobus_pin_setname(device_t dev, uint32_t pin, const char *name)
1072 struct gpiobus_softc *sc;
1074 sc = GPIOBUS_SOFTC(dev);
1075 if (pin > sc->sc_npins)
1079 /* Save the pin name. */
1080 if (sc->sc_pins[pin].name == NULL)
1081 sc->sc_pins[pin].name = malloc(GPIOMAXNAME, M_DEVBUF,
1083 strlcpy(sc->sc_pins[pin].name, name, GPIOMAXNAME);
1088 static device_method_t gpiobus_methods[] = {
1089 /* Device interface */
1090 DEVMETHOD(device_probe, gpiobus_probe),
1091 DEVMETHOD(device_attach, gpiobus_attach),
1092 DEVMETHOD(device_detach, gpiobus_detach),
1093 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1094 DEVMETHOD(device_suspend, gpiobus_suspend),
1095 DEVMETHOD(device_resume, gpiobus_resume),
1098 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
1099 DEVMETHOD(bus_config_intr, bus_generic_config_intr),
1100 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
1101 DEVMETHOD(bus_set_resource, gpiobus_set_resource),
1102 DEVMETHOD(bus_alloc_resource, gpiobus_alloc_resource),
1103 DEVMETHOD(bus_release_resource, gpiobus_release_resource),
1104 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
1105 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
1106 DEVMETHOD(bus_get_resource_list, gpiobus_get_resource_list),
1107 DEVMETHOD(bus_add_child, gpiobus_add_child),
1108 DEVMETHOD(bus_rescan, gpiobus_rescan),
1109 DEVMETHOD(bus_probe_nomatch, gpiobus_probe_nomatch),
1110 DEVMETHOD(bus_print_child, gpiobus_print_child),
1111 DEVMETHOD(bus_child_pnpinfo_str, gpiobus_child_pnpinfo_str),
1112 DEVMETHOD(bus_child_location_str, gpiobus_child_location_str),
1113 DEVMETHOD(bus_hinted_child, gpiobus_hinted_child),
1114 DEVMETHOD(bus_read_ivar, gpiobus_read_ivar),
1115 DEVMETHOD(bus_write_ivar, gpiobus_write_ivar),
1118 DEVMETHOD(gpiobus_acquire_bus, gpiobus_acquire_bus),
1119 DEVMETHOD(gpiobus_release_bus, gpiobus_release_bus),
1120 DEVMETHOD(gpiobus_pin_getflags, gpiobus_pin_getflags),
1121 DEVMETHOD(gpiobus_pin_getcaps, gpiobus_pin_getcaps),
1122 DEVMETHOD(gpiobus_pin_setflags, gpiobus_pin_setflags),
1123 DEVMETHOD(gpiobus_pin_get, gpiobus_pin_get),
1124 DEVMETHOD(gpiobus_pin_set, gpiobus_pin_set),
1125 DEVMETHOD(gpiobus_pin_toggle, gpiobus_pin_toggle),
1126 DEVMETHOD(gpiobus_pin_getname, gpiobus_pin_getname),
1127 DEVMETHOD(gpiobus_pin_setname, gpiobus_pin_setname),
1132 driver_t gpiobus_driver = {
1135 sizeof(struct gpiobus_softc)
1138 devclass_t gpiobus_devclass;
1140 EARLY_DRIVER_MODULE(gpiobus, gpio, gpiobus_driver, gpiobus_devclass, 0, 0,
1141 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
1142 MODULE_VERSION(gpiobus, 1);