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)
151 gpio_pin_get_by_bus_pinnum(device_t busdev, uint32_t pinnum, gpio_pin_t *ppin)
156 err = gpiobus_acquire_pin(busdev, pinnum);
160 pin = malloc(sizeof(*pin), M_DEVBUF, M_WAITOK | M_ZERO);
162 pin->dev = device_get_parent(busdev);
171 gpio_pin_get_by_child_index(device_t childdev, uint32_t idx, gpio_pin_t *ppin)
173 struct gpiobus_ivar *devi;
175 devi = GPIOBUS_IVAR(childdev);
176 if (idx >= devi->npins)
179 return (gpio_pin_get_by_bus_pinnum(device_get_parent(childdev),
180 devi->pins[idx], ppin));
184 gpio_pin_getcaps(gpio_pin_t pin, uint32_t *caps)
187 KASSERT(pin != NULL, ("GPIO pin is NULL."));
188 KASSERT(pin->dev != NULL, ("GPIO pin device is NULL."));
189 return (GPIO_PIN_GETCAPS(pin->dev, pin->pin, caps));
193 gpio_pin_is_active(gpio_pin_t pin, bool *active)
198 KASSERT(pin != NULL, ("GPIO pin is NULL."));
199 KASSERT(pin->dev != NULL, ("GPIO pin device is NULL."));
200 rv = GPIO_PIN_GET(pin->dev, pin->pin, &tmp);
205 if (pin->flags & GPIO_ACTIVE_LOW)
213 gpio_pin_release(gpio_pin_t gpio)
220 KASSERT(gpio->dev != NULL, ("GPIO pin device is NULL."));
222 busdev = GPIO_GET_BUS(gpio->dev);
224 gpiobus_release_pin(busdev, gpio->pin);
226 free(gpio, M_DEVBUF);
230 gpio_pin_set_active(gpio_pin_t pin, bool active)
235 if (pin->flags & GPIO_ACTIVE_LOW)
236 tmp = active ? 0 : 1;
238 tmp = active ? 1 : 0;
240 KASSERT(pin != NULL, ("GPIO pin is NULL."));
241 KASSERT(pin->dev != NULL, ("GPIO pin device is NULL."));
242 rv = GPIO_PIN_SET(pin->dev, pin->pin, tmp);
247 gpio_pin_setflags(gpio_pin_t pin, uint32_t flags)
251 KASSERT(pin != NULL, ("GPIO pin is NULL."));
252 KASSERT(pin->dev != NULL, ("GPIO pin device is NULL."));
254 rv = GPIO_PIN_SETFLAGS(pin->dev, pin->pin, flags);
259 gpiobus_print_pins(struct gpiobus_ivar *devi, char *buf, size_t buflen)
262 int i, range_start, range_stop, need_coma;
264 if (devi->npins == 0)
268 range_start = range_stop = devi->pins[0];
269 for (i = 1; i < devi->npins; i++) {
270 if (devi->pins[i] != (range_stop + 1)) {
272 strlcat(buf, ",", buflen);
273 memset(tmp, 0, sizeof(tmp));
274 if (range_start != range_stop)
275 snprintf(tmp, sizeof(tmp) - 1, "%d-%d",
276 range_start, range_stop);
278 snprintf(tmp, sizeof(tmp) - 1, "%d",
280 strlcat(buf, tmp, buflen);
282 range_start = range_stop = devi->pins[i];
290 strlcat(buf, ",", buflen);
291 memset(tmp, 0, sizeof(tmp));
292 if (range_start != range_stop)
293 snprintf(tmp, sizeof(tmp) - 1, "%d-%d",
294 range_start, range_stop);
296 snprintf(tmp, sizeof(tmp) - 1, "%d",
298 strlcat(buf, tmp, buflen);
302 gpiobus_attach_bus(device_t dev)
306 busdev = device_add_child(dev, "gpiobus", -1);
309 if (device_add_child(dev, "gpioc", -1) == NULL) {
310 device_delete_child(dev, busdev);
314 ofw_gpiobus_register_provider(dev);
316 bus_generic_attach(dev);
322 gpiobus_detach_bus(device_t dev)
327 ofw_gpiobus_unregister_provider(dev);
329 err = bus_generic_detach(dev);
333 return (device_delete_children(dev));
337 gpiobus_init_softc(device_t dev)
339 struct gpiobus_softc *sc;
341 sc = GPIOBUS_SOFTC(dev);
343 sc->sc_dev = device_get_parent(dev);
344 sc->sc_intr_rman.rm_type = RMAN_ARRAY;
345 sc->sc_intr_rman.rm_descr = "GPIO Interrupts";
346 if (rman_init(&sc->sc_intr_rman) != 0 ||
347 rman_manage_region(&sc->sc_intr_rman, 0, ~0) != 0)
348 panic("%s: failed to set up rman.", __func__);
350 if (GPIO_PIN_MAX(sc->sc_dev, &sc->sc_npins) != 0)
353 KASSERT(sc->sc_npins >= 0, ("GPIO device with no pins"));
355 /* Pins = GPIO_PIN_MAX() + 1 */
358 sc->sc_pins = malloc(sizeof(*sc->sc_pins) * sc->sc_npins, M_DEVBUF,
360 if (sc->sc_pins == NULL)
363 /* Initialize the bus lock. */
364 GPIOBUS_LOCK_INIT(sc);
370 gpiobus_alloc_ivars(struct gpiobus_ivar *devi)
373 /* Allocate pins and flags memory. */
374 devi->pins = malloc(sizeof(uint32_t) * devi->npins, M_DEVBUF,
376 if (devi->pins == NULL)
382 gpiobus_free_ivars(struct gpiobus_ivar *devi)
386 free(devi->pins, M_DEVBUF);
393 gpiobus_acquire_pin(device_t bus, uint32_t pin)
395 struct gpiobus_softc *sc;
397 sc = device_get_softc(bus);
398 /* Consistency check. */
399 if (pin >= sc->sc_npins) {
401 "invalid pin %d, max: %d\n", pin, sc->sc_npins - 1);
404 /* Mark pin as mapped and give warning if it's already mapped. */
405 if (sc->sc_pins[pin].mapped) {
406 device_printf(bus, "warning: pin %d is already mapped\n", pin);
409 sc->sc_pins[pin].mapped = 1;
414 /* Release mapped pin */
416 gpiobus_release_pin(device_t bus, uint32_t pin)
418 struct gpiobus_softc *sc;
420 sc = device_get_softc(bus);
421 /* Consistency check. */
422 if (pin >= sc->sc_npins) {
424 "gpiobus_acquire_pin: invalid pin %d, max=%d\n",
425 pin, sc->sc_npins - 1);
429 if (!sc->sc_pins[pin].mapped) {
430 device_printf(bus, "gpiobus_acquire_pin: pin %d is not mapped\n", pin);
433 sc->sc_pins[pin].mapped = 0;
439 gpiobus_acquire_child_pins(device_t dev, device_t child)
441 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
444 for (i = 0; i < devi->npins; i++) {
445 /* Reserve the GPIO pin. */
446 if (gpiobus_acquire_pin(dev, devi->pins[i]) != 0) {
447 device_printf(child, "cannot acquire pin %d\n",
450 (void)gpiobus_release_pin(dev,
453 gpiobus_free_ivars(devi);
457 for (i = 0; i < devi->npins; i++) {
458 /* Use the child name as pin name. */
459 GPIOBUS_PIN_SETNAME(dev, devi->pins[i],
460 device_get_nameunit(child));
467 gpiobus_parse_pins(struct gpiobus_softc *sc, device_t child, int mask)
469 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
473 for (i = 0; i < 32; i++) {
478 device_printf(child, "empty pin mask\n");
482 if (gpiobus_alloc_ivars(devi) != 0) {
483 device_printf(child, "cannot allocate device ivars\n");
487 for (i = 0; i < 32; i++) {
488 if ((mask & (1 << i)) == 0)
490 devi->pins[npins++] = i;
497 gpiobus_parse_pin_list(struct gpiobus_softc *sc, device_t child,
500 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
509 pin = strtoul(p, &endp, 0);
519 device_printf(child, "garbage in the pin list: %s\n", endp);
523 device_printf(child, "empty pin list\n");
528 if (gpiobus_alloc_ivars(devi) != 0) {
529 device_printf(child, "cannot allocate device ivars\n");
536 pin = strtoul(p, &endp, 0);
550 gpiobus_probe(device_t dev)
552 device_set_desc(dev, "GPIO bus");
554 return (BUS_PROBE_GENERIC);
558 gpiobus_attach(device_t dev)
562 err = gpiobus_init_softc(dev);
567 * Get parent's pins and mark them as unmapped
569 bus_generic_probe(dev);
570 bus_enumerate_hinted_children(dev);
572 return (bus_generic_attach(dev));
576 * Since this is not a self-enumerating bus, and since we always add
577 * children in attach, we have to always delete children here.
580 gpiobus_detach(device_t dev)
582 struct gpiobus_softc *sc;
583 struct gpiobus_ivar *devi;
587 sc = GPIOBUS_SOFTC(dev);
588 KASSERT(mtx_initialized(&sc->sc_mtx),
589 ("gpiobus mutex not initialized"));
590 GPIOBUS_LOCK_DESTROY(sc);
592 if ((err = bus_generic_detach(dev)) != 0)
595 if ((err = device_get_children(dev, &devlist, &ndevs)) != 0)
597 for (i = 0; i < ndevs; i++) {
598 devi = GPIOBUS_IVAR(devlist[i]);
599 gpiobus_free_ivars(devi);
600 resource_list_free(&devi->rl);
601 free(devi, M_DEVBUF);
602 device_delete_child(dev, devlist[i]);
604 free(devlist, M_TEMP);
605 rman_fini(&sc->sc_intr_rman);
607 for (i = 0; i < sc->sc_npins; i++) {
608 if (sc->sc_pins[i].name != NULL)
609 free(sc->sc_pins[i].name, M_DEVBUF);
610 sc->sc_pins[i].name = NULL;
612 free(sc->sc_pins, M_DEVBUF);
620 gpiobus_suspend(device_t dev)
623 return (bus_generic_suspend(dev));
627 gpiobus_resume(device_t dev)
630 return (bus_generic_resume(dev));
634 gpiobus_probe_nomatch(device_t dev, device_t child)
637 struct gpiobus_ivar *devi;
639 devi = GPIOBUS_IVAR(child);
640 memset(pins, 0, sizeof(pins));
641 gpiobus_print_pins(devi, pins, sizeof(pins));
643 device_printf(dev, "<unknown device> at pins %s", pins);
645 device_printf(dev, "<unknown device> at pin %s", pins);
646 resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%jd");
651 gpiobus_print_child(device_t dev, device_t child)
655 struct gpiobus_ivar *devi;
657 devi = GPIOBUS_IVAR(child);
658 memset(pins, 0, sizeof(pins));
659 retval += bus_print_child_header(dev, child);
660 if (devi->npins > 0) {
662 retval += printf(" at pins ");
664 retval += printf(" at pin ");
665 gpiobus_print_pins(devi, pins, sizeof(pins));
666 retval += printf("%s", pins);
668 resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%jd");
669 retval += bus_print_child_footer(dev, child);
675 gpiobus_child_location_str(device_t bus, device_t child, char *buf,
678 struct gpiobus_ivar *devi;
680 devi = GPIOBUS_IVAR(child);
682 strlcpy(buf, "pins=", buflen);
684 strlcpy(buf, "pin=", buflen);
685 gpiobus_print_pins(devi, buf, buflen);
691 gpiobus_child_pnpinfo_str(device_t bus, device_t child, char *buf,
700 gpiobus_add_child(device_t dev, u_int order, const char *name, int unit)
703 struct gpiobus_ivar *devi;
705 child = device_add_child_ordered(dev, order, name, unit);
708 devi = malloc(sizeof(struct gpiobus_ivar), M_DEVBUF, M_NOWAIT | M_ZERO);
710 device_delete_child(dev, child);
713 resource_list_init(&devi->rl);
714 device_set_ivars(child, devi);
720 gpiobus_rescan(device_t dev)
724 * Re-scan is supposed to remove and add children, but if someone has
725 * deleted the hints for a child we attached earlier, we have no easy
726 * way to handle that. So this just attaches new children for whom new
727 * hints or drivers have arrived since we last tried.
729 bus_enumerate_hinted_children(dev);
730 bus_generic_attach(dev);
735 gpiobus_hinted_child(device_t bus, const char *dname, int dunit)
737 struct gpiobus_softc *sc = GPIOBUS_SOFTC(bus);
738 struct gpiobus_ivar *devi;
743 if (device_find_child(bus, dname, dunit) != NULL) {
747 child = BUS_ADD_CHILD(bus, 0, dname, dunit);
748 devi = GPIOBUS_IVAR(child);
749 if (resource_int_value(dname, dunit, "pins", &pinmask) == 0) {
750 if (gpiobus_parse_pins(sc, child, pinmask)) {
751 resource_list_free(&devi->rl);
752 free(devi, M_DEVBUF);
753 device_delete_child(bus, child);
757 else if (resource_string_value(dname, dunit, "pin_list", &pins) == 0) {
758 if (gpiobus_parse_pin_list(sc, child, pins)) {
759 resource_list_free(&devi->rl);
760 free(devi, M_DEVBUF);
761 device_delete_child(bus, child);
765 if (resource_int_value(dname, dunit, "irq", &irq) == 0) {
766 if (bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1) != 0)
768 "warning: bus_set_resource() failed\n");
773 gpiobus_set_resource(device_t dev, device_t child, int type, int rid,
774 rman_res_t start, rman_res_t count)
776 struct gpiobus_ivar *devi;
777 struct resource_list_entry *rle;
779 dprintf("%s: entry (%p, %p, %d, %d, %p, %ld)\n",
780 __func__, dev, child, type, rid, (void *)(intptr_t)start, count);
781 devi = GPIOBUS_IVAR(child);
782 rle = resource_list_add(&devi->rl, type, rid, start,
783 start + count - 1, count);
791 gpiobus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
793 struct gpiobus_ivar *devi;
795 devi = GPIOBUS_IVAR(child);
797 case GPIOBUS_IVAR_NPINS:
798 *result = devi->npins;
800 case GPIOBUS_IVAR_PINS:
801 /* Children do not ever need to directly examine this. */
811 gpiobus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
813 struct gpiobus_ivar *devi;
817 devi = GPIOBUS_IVAR(child);
819 case GPIOBUS_IVAR_NPINS:
820 /* GPIO ivars are set once. */
821 if (devi->npins != 0) {
825 if (gpiobus_alloc_ivars(devi) != 0) {
826 device_printf(child, "cannot allocate device ivars\n");
831 case GPIOBUS_IVAR_PINS:
832 ptr = (const uint32_t *)value;
833 for (i = 0; i < devi->npins; i++)
834 devi->pins[i] = ptr[i];
835 if (gpiobus_acquire_child_pins(dev, child) != 0)
845 static struct resource *
846 gpiobus_alloc_resource(device_t bus, device_t child, int type, int *rid,
847 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
849 struct gpiobus_softc *sc;
851 struct resource_list *rl;
852 struct resource_list_entry *rle;
855 if (type != SYS_RES_IRQ)
857 isdefault = (RMAN_IS_DEFAULT_RANGE(start, end) && count == 1);
860 rl = BUS_GET_RESOURCE_LIST(bus, child);
863 rle = resource_list_find(rl, type, *rid);
866 if (rle->res != NULL)
867 panic("%s: resource entry is busy", __func__);
872 sc = device_get_softc(bus);
873 rv = rman_reserve_resource(&sc->sc_intr_rman, start, end, count, flags,
877 rman_set_rid(rv, *rid);
878 if ((flags & RF_ACTIVE) != 0 &&
879 bus_activate_resource(child, type, *rid, rv) != 0) {
880 rman_release_resource(rv);
888 gpiobus_release_resource(device_t bus __unused, device_t child, int type,
889 int rid, struct resource *r)
893 if (rman_get_flags(r) & RF_ACTIVE) {
894 error = bus_deactivate_resource(child, type, rid, r);
899 return (rman_release_resource(r));
902 static struct resource_list *
903 gpiobus_get_resource_list(device_t bus __unused, device_t child)
905 struct gpiobus_ivar *ivar;
907 ivar = GPIOBUS_IVAR(child);
913 gpiobus_acquire_bus(device_t busdev, device_t child, int how)
915 struct gpiobus_softc *sc;
917 sc = device_get_softc(busdev);
918 GPIOBUS_ASSERT_UNLOCKED(sc);
920 if (sc->sc_owner != NULL) {
921 if (sc->sc_owner == child)
922 panic("%s: %s still owns the bus.",
923 device_get_nameunit(busdev),
924 device_get_nameunit(child));
925 if (how == GPIOBUS_DONTWAIT) {
927 return (EWOULDBLOCK);
929 while (sc->sc_owner != NULL)
930 mtx_sleep(sc, &sc->sc_mtx, 0, "gpiobuswait", 0);
932 sc->sc_owner = child;
939 gpiobus_release_bus(device_t busdev, device_t child)
941 struct gpiobus_softc *sc;
943 sc = device_get_softc(busdev);
944 GPIOBUS_ASSERT_UNLOCKED(sc);
946 if (sc->sc_owner == NULL)
947 panic("%s: %s releasing unowned bus.",
948 device_get_nameunit(busdev),
949 device_get_nameunit(child));
950 if (sc->sc_owner != child)
951 panic("%s: %s trying to release bus owned by %s",
952 device_get_nameunit(busdev),
953 device_get_nameunit(child),
954 device_get_nameunit(sc->sc_owner));
961 gpiobus_pin_setflags(device_t dev, device_t child, uint32_t pin,
964 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
965 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
968 if (pin >= devi->npins)
970 if (GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], &caps) != 0)
972 if (gpio_check_flags(caps, flags) != 0)
975 return (GPIO_PIN_SETFLAGS(sc->sc_dev, devi->pins[pin], flags));
979 gpiobus_pin_getflags(device_t dev, device_t child, uint32_t pin,
982 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
983 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
985 if (pin >= devi->npins)
988 return GPIO_PIN_GETFLAGS(sc->sc_dev, devi->pins[pin], flags);
992 gpiobus_pin_getcaps(device_t dev, device_t child, uint32_t pin,
995 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
996 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
998 if (pin >= devi->npins)
1001 return GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], caps);
1005 gpiobus_pin_set(device_t dev, device_t child, uint32_t pin,
1008 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
1009 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
1011 if (pin >= devi->npins)
1014 return GPIO_PIN_SET(sc->sc_dev, devi->pins[pin], value);
1018 gpiobus_pin_get(device_t dev, device_t child, uint32_t pin,
1019 unsigned int *value)
1021 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
1022 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
1024 if (pin >= devi->npins)
1027 return GPIO_PIN_GET(sc->sc_dev, devi->pins[pin], value);
1031 gpiobus_pin_toggle(device_t dev, device_t child, uint32_t pin)
1033 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
1034 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
1036 if (pin >= devi->npins)
1039 return GPIO_PIN_TOGGLE(sc->sc_dev, devi->pins[pin]);
1043 gpiobus_pin_getname(device_t dev, uint32_t pin, char *name)
1045 struct gpiobus_softc *sc;
1047 sc = GPIOBUS_SOFTC(dev);
1048 if (pin > sc->sc_npins)
1050 /* Did we have a name for this pin ? */
1051 if (sc->sc_pins[pin].name != NULL) {
1052 memcpy(name, sc->sc_pins[pin].name, GPIOMAXNAME);
1056 /* Return the default pin name. */
1057 return (GPIO_PIN_GETNAME(device_get_parent(dev), pin, name));
1061 gpiobus_pin_setname(device_t dev, uint32_t pin, const char *name)
1063 struct gpiobus_softc *sc;
1065 sc = GPIOBUS_SOFTC(dev);
1066 if (pin > sc->sc_npins)
1070 /* Save the pin name. */
1071 if (sc->sc_pins[pin].name == NULL)
1072 sc->sc_pins[pin].name = malloc(GPIOMAXNAME, M_DEVBUF,
1074 strlcpy(sc->sc_pins[pin].name, name, GPIOMAXNAME);
1079 static device_method_t gpiobus_methods[] = {
1080 /* Device interface */
1081 DEVMETHOD(device_probe, gpiobus_probe),
1082 DEVMETHOD(device_attach, gpiobus_attach),
1083 DEVMETHOD(device_detach, gpiobus_detach),
1084 DEVMETHOD(device_shutdown, bus_generic_shutdown),
1085 DEVMETHOD(device_suspend, gpiobus_suspend),
1086 DEVMETHOD(device_resume, gpiobus_resume),
1089 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
1090 DEVMETHOD(bus_config_intr, bus_generic_config_intr),
1091 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
1092 DEVMETHOD(bus_set_resource, gpiobus_set_resource),
1093 DEVMETHOD(bus_alloc_resource, gpiobus_alloc_resource),
1094 DEVMETHOD(bus_release_resource, gpiobus_release_resource),
1095 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
1096 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
1097 DEVMETHOD(bus_get_resource_list, gpiobus_get_resource_list),
1098 DEVMETHOD(bus_add_child, gpiobus_add_child),
1099 DEVMETHOD(bus_rescan, gpiobus_rescan),
1100 DEVMETHOD(bus_probe_nomatch, gpiobus_probe_nomatch),
1101 DEVMETHOD(bus_print_child, gpiobus_print_child),
1102 DEVMETHOD(bus_child_pnpinfo_str, gpiobus_child_pnpinfo_str),
1103 DEVMETHOD(bus_child_location_str, gpiobus_child_location_str),
1104 DEVMETHOD(bus_hinted_child, gpiobus_hinted_child),
1105 DEVMETHOD(bus_read_ivar, gpiobus_read_ivar),
1106 DEVMETHOD(bus_write_ivar, gpiobus_write_ivar),
1109 DEVMETHOD(gpiobus_acquire_bus, gpiobus_acquire_bus),
1110 DEVMETHOD(gpiobus_release_bus, gpiobus_release_bus),
1111 DEVMETHOD(gpiobus_pin_getflags, gpiobus_pin_getflags),
1112 DEVMETHOD(gpiobus_pin_getcaps, gpiobus_pin_getcaps),
1113 DEVMETHOD(gpiobus_pin_setflags, gpiobus_pin_setflags),
1114 DEVMETHOD(gpiobus_pin_get, gpiobus_pin_get),
1115 DEVMETHOD(gpiobus_pin_set, gpiobus_pin_set),
1116 DEVMETHOD(gpiobus_pin_toggle, gpiobus_pin_toggle),
1117 DEVMETHOD(gpiobus_pin_getname, gpiobus_pin_getname),
1118 DEVMETHOD(gpiobus_pin_setname, gpiobus_pin_setname),
1123 driver_t gpiobus_driver = {
1126 sizeof(struct gpiobus_softc)
1129 devclass_t gpiobus_devclass;
1131 EARLY_DRIVER_MODULE(gpiobus, gpio, gpiobus_driver, gpiobus_devclass, 0, 0,
1132 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
1133 MODULE_VERSION(gpiobus, 1);