Index: head/sys/dev/gpio/gpiobus.c =================================================================== --- head/sys/dev/gpio/gpiobus.c (revision 355273) +++ head/sys/dev/gpio/gpiobus.c (revision 355274) @@ -1,997 +1,1103 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2009 Oleksandr Tymoshenko * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #ifdef INTRNG #include #endif #include #include #include #include #include "gpiobus_if.h" #undef GPIOBUS_DEBUG #ifdef GPIOBUS_DEBUG #define dprintf printf #else #define dprintf(x, arg...) #endif static void gpiobus_print_pins(struct gpiobus_ivar *, char *, size_t); static int gpiobus_parse_pins(struct gpiobus_softc *, device_t, int); static int gpiobus_probe(device_t); static int gpiobus_attach(device_t); static int gpiobus_detach(device_t); static int gpiobus_suspend(device_t); static int gpiobus_resume(device_t); static void gpiobus_probe_nomatch(device_t, device_t); static int gpiobus_print_child(device_t, device_t); static int gpiobus_child_location_str(device_t, device_t, char *, size_t); static int gpiobus_child_pnpinfo_str(device_t, device_t, char *, size_t); static device_t gpiobus_add_child(device_t, u_int, const char *, int); static void gpiobus_hinted_child(device_t, const char *, int); /* * GPIOBUS interface */ static int gpiobus_acquire_bus(device_t, device_t, int); static void gpiobus_release_bus(device_t, device_t); static int gpiobus_pin_setflags(device_t, device_t, uint32_t, uint32_t); static int gpiobus_pin_getflags(device_t, device_t, uint32_t, uint32_t*); static int gpiobus_pin_getcaps(device_t, device_t, uint32_t, uint32_t*); static int gpiobus_pin_set(device_t, device_t, uint32_t, unsigned int); static int gpiobus_pin_get(device_t, device_t, uint32_t, unsigned int*); static int gpiobus_pin_toggle(device_t, device_t, uint32_t); +#define GPIO_ACTIVE_LOW 1 /* XXX Note that nothing currently sets this flag */ + /* * XXX -> Move me to better place - gpio_subr.c? * Also, this function must be changed when interrupt configuration * data will be moved into struct resource. */ #ifdef INTRNG struct resource * gpio_alloc_intr_resource(device_t consumer_dev, int *rid, u_int alloc_flags, gpio_pin_t pin, uint32_t intr_mode) { u_int irq; struct intr_map_data_gpio *gpio_data; struct resource *res; gpio_data = (struct intr_map_data_gpio *)intr_alloc_map_data( INTR_MAP_DATA_GPIO, sizeof(*gpio_data), M_WAITOK | M_ZERO); gpio_data->gpio_pin_num = pin->pin; gpio_data->gpio_pin_flags = pin->flags; gpio_data->gpio_intr_mode = intr_mode; irq = intr_map_irq(pin->dev, 0, (struct intr_map_data *)gpio_data); res = bus_alloc_resource(consumer_dev, SYS_RES_IRQ, rid, irq, irq, 1, alloc_flags); if (res == NULL) { intr_free_intr_map_data((struct intr_map_data *)gpio_data); return (NULL); } rman_set_virtual(res, gpio_data); return (res); } #else struct resource * gpio_alloc_intr_resource(device_t consumer_dev, int *rid, u_int alloc_flags, gpio_pin_t pin, uint32_t intr_mode) { return (NULL); } #endif int gpio_check_flags(uint32_t caps, uint32_t flags) { /* Filter unwanted flags. */ flags &= caps; /* Cannot mix input/output together. */ if (flags & GPIO_PIN_INPUT && flags & GPIO_PIN_OUTPUT) return (EINVAL); /* Cannot mix pull-up/pull-down together. */ if (flags & GPIO_PIN_PULLUP && flags & GPIO_PIN_PULLDOWN) return (EINVAL); return (0); } +int +gpio_pin_get_by_bus_pinnum(device_t busdev, uint32_t pinnum, gpio_pin_t *ppin) +{ + gpio_pin_t pin; + int err; + + err = gpiobus_acquire_pin(busdev, pinnum); + if (err != 0) + return (EBUSY); + + pin = malloc(sizeof(*pin), M_DEVBUF, M_WAITOK | M_ZERO); + + pin->dev = device_get_parent(busdev); + pin->pin = pinnum; + GPIO_PIN_GETFLAGS(pin->dev, pin->pin, &pin->flags); + + *ppin = pin; + return (0); +} + +int +gpio_pin_get_by_child_index(device_t childdev, uint32_t idx, gpio_pin_t *ppin) +{ + struct gpiobus_ivar *devi; + + devi = GPIOBUS_IVAR(childdev); + if (idx >= devi->npins) + return (EINVAL); + + return (gpio_pin_get_by_bus_pinnum(device_get_parent(childdev), + devi->pins[idx], ppin)); +} + +int +gpio_pin_getcaps(gpio_pin_t pin, uint32_t *caps) +{ + + KASSERT(pin != NULL, ("GPIO pin is NULL.")); + KASSERT(pin->dev != NULL, ("GPIO pin device is NULL.")); + return (GPIO_PIN_GETCAPS(pin->dev, pin->pin, caps)); +} + +int +gpio_pin_is_active(gpio_pin_t pin, bool *active) +{ + int rv; + uint32_t tmp; + + KASSERT(pin != NULL, ("GPIO pin is NULL.")); + KASSERT(pin->dev != NULL, ("GPIO pin device is NULL.")); + rv = GPIO_PIN_GET(pin->dev, pin->pin, &tmp); + if (rv != 0) { + return (rv); + } + + if (pin->flags & GPIO_ACTIVE_LOW) + *active = tmp == 0; + else + *active = tmp != 0; + return (0); +} + +void +gpio_pin_release(gpio_pin_t gpio) +{ + device_t busdev; + + if (gpio == NULL) + return; + + KASSERT(gpio->dev != NULL, ("GPIO pin device is NULL.")); + + busdev = GPIO_GET_BUS(gpio->dev); + if (busdev != NULL) + gpiobus_release_pin(busdev, gpio->pin); + + free(gpio, M_DEVBUF); +} + +int +gpio_pin_set_active(gpio_pin_t pin, bool active) +{ + int rv; + uint32_t tmp; + + if (pin->flags & GPIO_ACTIVE_LOW) + tmp = active ? 0 : 1; + else + tmp = active ? 1 : 0; + + KASSERT(pin != NULL, ("GPIO pin is NULL.")); + KASSERT(pin->dev != NULL, ("GPIO pin device is NULL.")); + rv = GPIO_PIN_SET(pin->dev, pin->pin, tmp); + return (rv); +} + +int +gpio_pin_setflags(gpio_pin_t pin, uint32_t flags) +{ + int rv; + + KASSERT(pin != NULL, ("GPIO pin is NULL.")); + KASSERT(pin->dev != NULL, ("GPIO pin device is NULL.")); + + rv = GPIO_PIN_SETFLAGS(pin->dev, pin->pin, flags); + return (rv); +} + static void gpiobus_print_pins(struct gpiobus_ivar *devi, char *buf, size_t buflen) { char tmp[128]; int i, range_start, range_stop, need_coma; if (devi->npins == 0) return; need_coma = 0; range_start = range_stop = devi->pins[0]; for (i = 1; i < devi->npins; i++) { if (devi->pins[i] != (range_stop + 1)) { if (need_coma) strlcat(buf, ",", buflen); memset(tmp, 0, sizeof(tmp)); if (range_start != range_stop) snprintf(tmp, sizeof(tmp) - 1, "%d-%d", range_start, range_stop); else snprintf(tmp, sizeof(tmp) - 1, "%d", range_start); strlcat(buf, tmp, buflen); range_start = range_stop = devi->pins[i]; need_coma = 1; } else range_stop++; } if (need_coma) strlcat(buf, ",", buflen); memset(tmp, 0, sizeof(tmp)); if (range_start != range_stop) snprintf(tmp, sizeof(tmp) - 1, "%d-%d", range_start, range_stop); else snprintf(tmp, sizeof(tmp) - 1, "%d", range_start); strlcat(buf, tmp, buflen); } device_t gpiobus_attach_bus(device_t dev) { device_t busdev; busdev = device_add_child(dev, "gpiobus", -1); if (busdev == NULL) return (NULL); if (device_add_child(dev, "gpioc", -1) == NULL) { device_delete_child(dev, busdev); return (NULL); } #ifdef FDT ofw_gpiobus_register_provider(dev); #endif bus_generic_attach(dev); return (busdev); } int gpiobus_detach_bus(device_t dev) { int err; #ifdef FDT ofw_gpiobus_unregister_provider(dev); #endif err = bus_generic_detach(dev); if (err != 0) return (err); return (device_delete_children(dev)); } int gpiobus_init_softc(device_t dev) { struct gpiobus_softc *sc; sc = GPIOBUS_SOFTC(dev); sc->sc_busdev = dev; sc->sc_dev = device_get_parent(dev); sc->sc_intr_rman.rm_type = RMAN_ARRAY; sc->sc_intr_rman.rm_descr = "GPIO Interrupts"; if (rman_init(&sc->sc_intr_rman) != 0 || rman_manage_region(&sc->sc_intr_rman, 0, ~0) != 0) panic("%s: failed to set up rman.", __func__); if (GPIO_PIN_MAX(sc->sc_dev, &sc->sc_npins) != 0) return (ENXIO); KASSERT(sc->sc_npins >= 0, ("GPIO device with no pins")); /* Pins = GPIO_PIN_MAX() + 1 */ sc->sc_npins++; sc->sc_pins = malloc(sizeof(*sc->sc_pins) * sc->sc_npins, M_DEVBUF, M_NOWAIT | M_ZERO); if (sc->sc_pins == NULL) return (ENOMEM); /* Initialize the bus lock. */ GPIOBUS_LOCK_INIT(sc); return (0); } int gpiobus_alloc_ivars(struct gpiobus_ivar *devi) { /* Allocate pins and flags memory. */ devi->pins = malloc(sizeof(uint32_t) * devi->npins, M_DEVBUF, M_NOWAIT | M_ZERO); if (devi->pins == NULL) return (ENOMEM); return (0); } void gpiobus_free_ivars(struct gpiobus_ivar *devi) { if (devi->pins) { free(devi->pins, M_DEVBUF); devi->pins = NULL; } devi->npins = 0; } int gpiobus_acquire_pin(device_t bus, uint32_t pin) { struct gpiobus_softc *sc; sc = device_get_softc(bus); /* Consistency check. */ if (pin >= sc->sc_npins) { device_printf(bus, "invalid pin %d, max: %d\n", pin, sc->sc_npins - 1); return (-1); } /* Mark pin as mapped and give warning if it's already mapped. */ if (sc->sc_pins[pin].mapped) { device_printf(bus, "warning: pin %d is already mapped\n", pin); return (-1); } sc->sc_pins[pin].mapped = 1; return (0); } /* Release mapped pin */ int gpiobus_release_pin(device_t bus, uint32_t pin) { struct gpiobus_softc *sc; sc = device_get_softc(bus); /* Consistency check. */ if (pin >= sc->sc_npins) { device_printf(bus, "gpiobus_acquire_pin: invalid pin %d, max=%d\n", pin, sc->sc_npins - 1); return (-1); } if (!sc->sc_pins[pin].mapped) { device_printf(bus, "gpiobus_acquire_pin: pin %d is not mapped\n", pin); return (-1); } sc->sc_pins[pin].mapped = 0; return (0); } static int gpiobus_acquire_child_pins(device_t dev, device_t child) { struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); int i; for (i = 0; i < devi->npins; i++) { /* Reserve the GPIO pin. */ if (gpiobus_acquire_pin(dev, devi->pins[i]) != 0) { device_printf(child, "cannot acquire pin %d\n", devi->pins[i]); while (--i >= 0) { (void)gpiobus_release_pin(dev, devi->pins[i]); } gpiobus_free_ivars(devi); return (EBUSY); } } for (i = 0; i < devi->npins; i++) { /* Use the child name as pin name. */ GPIOBUS_PIN_SETNAME(dev, devi->pins[i], device_get_nameunit(child)); } return (0); } static int gpiobus_parse_pins(struct gpiobus_softc *sc, device_t child, int mask) { struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); int i, npins; npins = 0; for (i = 0; i < 32; i++) { if (mask & (1 << i)) npins++; } if (npins == 0) { device_printf(child, "empty pin mask\n"); return (EINVAL); } devi->npins = npins; if (gpiobus_alloc_ivars(devi) != 0) { device_printf(child, "cannot allocate device ivars\n"); return (EINVAL); } npins = 0; for (i = 0; i < 32; i++) { if ((mask & (1 << i)) == 0) continue; devi->pins[npins++] = i; } - if (gpiobus_acquire_child_pins(sc->sc_busdev, child) != 0) - return (EINVAL); return (0); } static int gpiobus_parse_pin_list(struct gpiobus_softc *sc, device_t child, const char *pins) { struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); const char *p; char *endp; unsigned long pin; int i, npins; npins = 0; p = pins; for (;;) { pin = strtoul(p, &endp, 0); if (endp == p) break; npins++; if (*endp == '\0') break; p = endp + 1; } if (*endp != '\0') { device_printf(child, "garbage in the pin list: %s\n", endp); return (EINVAL); } if (npins == 0) { device_printf(child, "empty pin list\n"); return (EINVAL); } devi->npins = npins; if (gpiobus_alloc_ivars(devi) != 0) { device_printf(child, "cannot allocate device ivars\n"); return (EINVAL); } i = 0; p = pins; for (;;) { pin = strtoul(p, &endp, 0); devi->pins[i] = pin; if (*endp == '\0') break; i++; p = endp + 1; } - if (gpiobus_acquire_child_pins(sc->sc_busdev, child) != 0) - return (EINVAL); return (0); } static int gpiobus_probe(device_t dev) { device_set_desc(dev, "GPIO bus"); return (BUS_PROBE_GENERIC); } static int gpiobus_attach(device_t dev) { int err; err = gpiobus_init_softc(dev); if (err != 0) return (err); /* * Get parent's pins and mark them as unmapped */ bus_generic_probe(dev); bus_enumerate_hinted_children(dev); return (bus_generic_attach(dev)); } /* * Since this is not a self-enumerating bus, and since we always add * children in attach, we have to always delete children here. */ static int gpiobus_detach(device_t dev) { struct gpiobus_softc *sc; struct gpiobus_ivar *devi; device_t *devlist; int i, err, ndevs; sc = GPIOBUS_SOFTC(dev); KASSERT(mtx_initialized(&sc->sc_mtx), ("gpiobus mutex not initialized")); GPIOBUS_LOCK_DESTROY(sc); if ((err = bus_generic_detach(dev)) != 0) return (err); if ((err = device_get_children(dev, &devlist, &ndevs)) != 0) return (err); for (i = 0; i < ndevs; i++) { devi = GPIOBUS_IVAR(devlist[i]); gpiobus_free_ivars(devi); resource_list_free(&devi->rl); free(devi, M_DEVBUF); device_delete_child(dev, devlist[i]); } free(devlist, M_TEMP); rman_fini(&sc->sc_intr_rman); if (sc->sc_pins) { for (i = 0; i < sc->sc_npins; i++) { if (sc->sc_pins[i].name != NULL) free(sc->sc_pins[i].name, M_DEVBUF); sc->sc_pins[i].name = NULL; } free(sc->sc_pins, M_DEVBUF); sc->sc_pins = NULL; } return (0); } static int gpiobus_suspend(device_t dev) { return (bus_generic_suspend(dev)); } static int gpiobus_resume(device_t dev) { return (bus_generic_resume(dev)); } static void gpiobus_probe_nomatch(device_t dev, device_t child) { char pins[128]; struct gpiobus_ivar *devi; devi = GPIOBUS_IVAR(child); memset(pins, 0, sizeof(pins)); gpiobus_print_pins(devi, pins, sizeof(pins)); if (devi->npins > 1) device_printf(dev, " at pins %s", pins); else device_printf(dev, " at pin %s", pins); resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%jd"); printf("\n"); } static int gpiobus_print_child(device_t dev, device_t child) { char pins[128]; int retval = 0; struct gpiobus_ivar *devi; devi = GPIOBUS_IVAR(child); memset(pins, 0, sizeof(pins)); retval += bus_print_child_header(dev, child); if (devi->npins > 0) { if (devi->npins > 1) retval += printf(" at pins "); else retval += printf(" at pin "); gpiobus_print_pins(devi, pins, sizeof(pins)); retval += printf("%s", pins); } resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%jd"); retval += bus_print_child_footer(dev, child); return (retval); } static int gpiobus_child_location_str(device_t bus, device_t child, char *buf, size_t buflen) { struct gpiobus_ivar *devi; devi = GPIOBUS_IVAR(child); if (devi->npins > 1) strlcpy(buf, "pins=", buflen); else strlcpy(buf, "pin=", buflen); gpiobus_print_pins(devi, buf, buflen); return (0); } static int gpiobus_child_pnpinfo_str(device_t bus, device_t child, char *buf, size_t buflen) { *buf = '\0'; return (0); } static device_t gpiobus_add_child(device_t dev, u_int order, const char *name, int unit) { device_t child; struct gpiobus_ivar *devi; child = device_add_child_ordered(dev, order, name, unit); if (child == NULL) return (child); devi = malloc(sizeof(struct gpiobus_ivar), M_DEVBUF, M_NOWAIT | M_ZERO); if (devi == NULL) { device_delete_child(dev, child); return (NULL); } resource_list_init(&devi->rl); device_set_ivars(child, devi); return (child); } static void gpiobus_hinted_child(device_t bus, const char *dname, int dunit) { struct gpiobus_softc *sc = GPIOBUS_SOFTC(bus); struct gpiobus_ivar *devi; device_t child; const char *pins; int irq, pinmask; child = BUS_ADD_CHILD(bus, 0, dname, dunit); devi = GPIOBUS_IVAR(child); if (resource_int_value(dname, dunit, "pins", &pinmask) == 0) { if (gpiobus_parse_pins(sc, child, pinmask)) { resource_list_free(&devi->rl); free(devi, M_DEVBUF); device_delete_child(bus, child); return; } } else if (resource_string_value(dname, dunit, "pin_list", &pins) == 0) { if (gpiobus_parse_pin_list(sc, child, pins)) { resource_list_free(&devi->rl); free(devi, M_DEVBUF); device_delete_child(bus, child); return; } } if (resource_int_value(dname, dunit, "irq", &irq) == 0) { if (bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1) != 0) device_printf(bus, "warning: bus_set_resource() failed\n"); } } static int gpiobus_set_resource(device_t dev, device_t child, int type, int rid, rman_res_t start, rman_res_t count) { struct gpiobus_ivar *devi; struct resource_list_entry *rle; dprintf("%s: entry (%p, %p, %d, %d, %p, %ld)\n", __func__, dev, child, type, rid, (void *)(intptr_t)start, count); devi = GPIOBUS_IVAR(child); rle = resource_list_add(&devi->rl, type, rid, start, start + count - 1, count); if (rle == NULL) return (ENXIO); return (0); } static int gpiobus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) { struct gpiobus_ivar *devi; devi = GPIOBUS_IVAR(child); switch (which) { case GPIOBUS_IVAR_NPINS: *result = devi->npins; break; case GPIOBUS_IVAR_PINS: /* Children do not ever need to directly examine this. */ return (ENOTSUP); default: return (ENOENT); } return (0); } static int gpiobus_write_ivar(device_t dev, device_t child, int which, uintptr_t value) { struct gpiobus_ivar *devi; const uint32_t *ptr; int i; devi = GPIOBUS_IVAR(child); switch (which) { case GPIOBUS_IVAR_NPINS: /* GPIO ivars are set once. */ if (devi->npins != 0) { return (EBUSY); } devi->npins = value; if (gpiobus_alloc_ivars(devi) != 0) { device_printf(child, "cannot allocate device ivars\n"); devi->npins = 0; return (ENOMEM); } break; case GPIOBUS_IVAR_PINS: ptr = (const uint32_t *)value; for (i = 0; i < devi->npins; i++) devi->pins[i] = ptr[i]; if (gpiobus_acquire_child_pins(dev, child) != 0) return (EBUSY); break; default: return (ENOENT); } return (0); } static struct resource * gpiobus_alloc_resource(device_t bus, device_t child, int type, int *rid, rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) { struct gpiobus_softc *sc; struct resource *rv; struct resource_list *rl; struct resource_list_entry *rle; int isdefault; if (type != SYS_RES_IRQ) return (NULL); isdefault = (RMAN_IS_DEFAULT_RANGE(start, end) && count == 1); rle = NULL; if (isdefault) { rl = BUS_GET_RESOURCE_LIST(bus, child); if (rl == NULL) return (NULL); rle = resource_list_find(rl, type, *rid); if (rle == NULL) return (NULL); if (rle->res != NULL) panic("%s: resource entry is busy", __func__); start = rle->start; count = rle->count; end = rle->end; } sc = device_get_softc(bus); rv = rman_reserve_resource(&sc->sc_intr_rman, start, end, count, flags, child); if (rv == NULL) return (NULL); rman_set_rid(rv, *rid); if ((flags & RF_ACTIVE) != 0 && bus_activate_resource(child, type, *rid, rv) != 0) { rman_release_resource(rv); return (NULL); } return (rv); } static int gpiobus_release_resource(device_t bus __unused, device_t child, int type, int rid, struct resource *r) { int error; if (rman_get_flags(r) & RF_ACTIVE) { error = bus_deactivate_resource(child, type, rid, r); if (error) return (error); } return (rman_release_resource(r)); } static struct resource_list * gpiobus_get_resource_list(device_t bus __unused, device_t child) { struct gpiobus_ivar *ivar; ivar = GPIOBUS_IVAR(child); return (&ivar->rl); } static int gpiobus_acquire_bus(device_t busdev, device_t child, int how) { struct gpiobus_softc *sc; sc = device_get_softc(busdev); GPIOBUS_ASSERT_UNLOCKED(sc); GPIOBUS_LOCK(sc); if (sc->sc_owner != NULL) { if (sc->sc_owner == child) panic("%s: %s still owns the bus.", device_get_nameunit(busdev), device_get_nameunit(child)); if (how == GPIOBUS_DONTWAIT) { GPIOBUS_UNLOCK(sc); return (EWOULDBLOCK); } while (sc->sc_owner != NULL) mtx_sleep(sc, &sc->sc_mtx, 0, "gpiobuswait", 0); } sc->sc_owner = child; GPIOBUS_UNLOCK(sc); return (0); } static void gpiobus_release_bus(device_t busdev, device_t child) { struct gpiobus_softc *sc; sc = device_get_softc(busdev); GPIOBUS_ASSERT_UNLOCKED(sc); GPIOBUS_LOCK(sc); if (sc->sc_owner == NULL) panic("%s: %s releasing unowned bus.", device_get_nameunit(busdev), device_get_nameunit(child)); if (sc->sc_owner != child) panic("%s: %s trying to release bus owned by %s", device_get_nameunit(busdev), device_get_nameunit(child), device_get_nameunit(sc->sc_owner)); sc->sc_owner = NULL; wakeup(sc); GPIOBUS_UNLOCK(sc); } static int gpiobus_pin_setflags(device_t dev, device_t child, uint32_t pin, uint32_t flags) { struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); uint32_t caps; if (pin >= devi->npins) return (EINVAL); if (GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], &caps) != 0) return (EINVAL); if (gpio_check_flags(caps, flags) != 0) return (EINVAL); return (GPIO_PIN_SETFLAGS(sc->sc_dev, devi->pins[pin], flags)); } static int gpiobus_pin_getflags(device_t dev, device_t child, uint32_t pin, uint32_t *flags) { struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); if (pin >= devi->npins) return (EINVAL); return GPIO_PIN_GETFLAGS(sc->sc_dev, devi->pins[pin], flags); } static int gpiobus_pin_getcaps(device_t dev, device_t child, uint32_t pin, uint32_t *caps) { struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); if (pin >= devi->npins) return (EINVAL); return GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], caps); } static int gpiobus_pin_set(device_t dev, device_t child, uint32_t pin, unsigned int value) { struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); if (pin >= devi->npins) return (EINVAL); return GPIO_PIN_SET(sc->sc_dev, devi->pins[pin], value); } static int gpiobus_pin_get(device_t dev, device_t child, uint32_t pin, unsigned int *value) { struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); if (pin >= devi->npins) return (EINVAL); return GPIO_PIN_GET(sc->sc_dev, devi->pins[pin], value); } static int gpiobus_pin_toggle(device_t dev, device_t child, uint32_t pin) { struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev); struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); if (pin >= devi->npins) return (EINVAL); return GPIO_PIN_TOGGLE(sc->sc_dev, devi->pins[pin]); } static int gpiobus_pin_getname(device_t dev, uint32_t pin, char *name) { struct gpiobus_softc *sc; sc = GPIOBUS_SOFTC(dev); if (pin > sc->sc_npins) return (EINVAL); /* Did we have a name for this pin ? */ if (sc->sc_pins[pin].name != NULL) { memcpy(name, sc->sc_pins[pin].name, GPIOMAXNAME); return (0); } /* Return the default pin name. */ return (GPIO_PIN_GETNAME(device_get_parent(dev), pin, name)); } static int gpiobus_pin_setname(device_t dev, uint32_t pin, const char *name) { struct gpiobus_softc *sc; sc = GPIOBUS_SOFTC(dev); if (pin > sc->sc_npins) return (EINVAL); if (name == NULL) return (EINVAL); /* Save the pin name. */ if (sc->sc_pins[pin].name == NULL) sc->sc_pins[pin].name = malloc(GPIOMAXNAME, M_DEVBUF, M_WAITOK | M_ZERO); strlcpy(sc->sc_pins[pin].name, name, GPIOMAXNAME); return (0); } static device_method_t gpiobus_methods[] = { /* Device interface */ DEVMETHOD(device_probe, gpiobus_probe), DEVMETHOD(device_attach, gpiobus_attach), DEVMETHOD(device_detach, gpiobus_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, gpiobus_suspend), DEVMETHOD(device_resume, gpiobus_resume), /* Bus interface */ DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), DEVMETHOD(bus_config_intr, bus_generic_config_intr), DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), DEVMETHOD(bus_set_resource, gpiobus_set_resource), DEVMETHOD(bus_alloc_resource, gpiobus_alloc_resource), DEVMETHOD(bus_release_resource, gpiobus_release_resource), DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), DEVMETHOD(bus_get_resource_list, gpiobus_get_resource_list), DEVMETHOD(bus_add_child, gpiobus_add_child), DEVMETHOD(bus_probe_nomatch, gpiobus_probe_nomatch), DEVMETHOD(bus_print_child, gpiobus_print_child), DEVMETHOD(bus_child_pnpinfo_str, gpiobus_child_pnpinfo_str), DEVMETHOD(bus_child_location_str, gpiobus_child_location_str), DEVMETHOD(bus_hinted_child, gpiobus_hinted_child), DEVMETHOD(bus_read_ivar, gpiobus_read_ivar), DEVMETHOD(bus_write_ivar, gpiobus_write_ivar), /* GPIO protocol */ DEVMETHOD(gpiobus_acquire_bus, gpiobus_acquire_bus), DEVMETHOD(gpiobus_release_bus, gpiobus_release_bus), DEVMETHOD(gpiobus_pin_getflags, gpiobus_pin_getflags), DEVMETHOD(gpiobus_pin_getcaps, gpiobus_pin_getcaps), DEVMETHOD(gpiobus_pin_setflags, gpiobus_pin_setflags), DEVMETHOD(gpiobus_pin_get, gpiobus_pin_get), DEVMETHOD(gpiobus_pin_set, gpiobus_pin_set), DEVMETHOD(gpiobus_pin_toggle, gpiobus_pin_toggle), DEVMETHOD(gpiobus_pin_getname, gpiobus_pin_getname), DEVMETHOD(gpiobus_pin_setname, gpiobus_pin_setname), DEVMETHOD_END }; driver_t gpiobus_driver = { "gpiobus", gpiobus_methods, sizeof(struct gpiobus_softc) }; devclass_t gpiobus_devclass; EARLY_DRIVER_MODULE(gpiobus, gpio, gpiobus_driver, gpiobus_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); MODULE_VERSION(gpiobus, 1); Index: head/sys/dev/gpio/gpiobusvar.h =================================================================== --- head/sys/dev/gpio/gpiobusvar.h (revision 355273) +++ head/sys/dev/gpio/gpiobusvar.h (revision 355274) @@ -1,172 +1,187 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2009 Oleksandr Tymoshenko * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ * */ #ifndef __GPIOBUS_H__ #define __GPIOBUS_H__ #include "opt_platform.h" #include #include #include #ifdef FDT #include #endif #ifdef INTRNG #include #endif #include "gpio_if.h" #ifdef FDT #define GPIOBUS_IVAR(d) (struct gpiobus_ivar *) \ &((struct ofw_gpiobus_devinfo *)device_get_ivars(d))->opd_dinfo #else #define GPIOBUS_IVAR(d) (struct gpiobus_ivar *) device_get_ivars(d) #endif #define GPIOBUS_SOFTC(d) (struct gpiobus_softc *) device_get_softc(d) #define GPIOBUS_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) #define GPIOBUS_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) #define GPIOBUS_LOCK_INIT(_sc) mtx_init(&_sc->sc_mtx, \ device_get_nameunit(_sc->sc_dev), "gpiobus", MTX_DEF) #define GPIOBUS_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx) #define GPIOBUS_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED) #define GPIOBUS_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED) #define GPIOBUS_WAIT 1 #define GPIOBUS_DONTWAIT 2 /* Use default interrupt mode - for gpio_alloc_intr_resource */ #define GPIO_INTR_CONFORM GPIO_INTR_NONE struct gpiobus_pin_data { int mapped; /* pin is mapped/reserved. */ char *name; /* pin name. */ }; #ifdef INTRNG struct intr_map_data_gpio { struct intr_map_data hdr; u_int gpio_pin_num; u_int gpio_pin_flags; u_int gpio_intr_mode; }; #endif struct gpiobus_softc { struct mtx sc_mtx; /* bus mutex */ struct rman sc_intr_rman; /* isr resources */ device_t sc_busdev; /* bus device */ device_t sc_owner; /* bus owner */ device_t sc_dev; /* driver device */ int sc_npins; /* total pins on bus */ struct gpiobus_pin_data *sc_pins; /* pin data */ }; struct gpiobus_pin { device_t dev; /* gpio device */ uint32_t flags; /* pin flags */ uint32_t pin; /* pin number */ }; typedef struct gpiobus_pin *gpio_pin_t; struct gpiobus_ivar { struct resource_list rl; /* isr resource list */ uint32_t npins; /* pins total */ uint32_t *pins; /* pins map */ }; enum gpiobus_ivars { GPIOBUS_IVAR_NPINS = 10500, GPIOBUS_IVAR_PINS, }; #define GPIOBUS_ACCESSOR(var, ivar, type) \ __BUS_ACCESSOR(gpiobus, var, GPIOBUS, ivar, type) GPIOBUS_ACCESSOR(npins, NPINS, uint32_t) GPIOBUS_ACCESSOR(pins, PINS, const uint32_t *) #undef GPIOBUS_ACCESSOR #ifdef FDT struct ofw_gpiobus_devinfo { struct gpiobus_ivar opd_dinfo; struct ofw_bus_devinfo opd_obdinfo; }; static __inline int gpio_map_gpios(device_t bus, phandle_t dev, phandle_t gparent, int gcells, pcell_t *gpios, uint32_t *pin, uint32_t *flags) { return (GPIO_MAP_GPIOS(bus, dev, gparent, gcells, gpios, pin, flags)); } device_t ofw_gpiobus_add_fdt_child(device_t, const char *, phandle_t); int ofw_gpiobus_parse_gpios(device_t, char *, struct gpiobus_pin **); void ofw_gpiobus_register_provider(device_t); void ofw_gpiobus_unregister_provider(device_t); -/* Consumers interface. */ +/* Acquire a pin by parsing FDT data. */ int gpio_pin_get_by_ofw_name(device_t consumer, phandle_t node, char *name, gpio_pin_t *gpio); int gpio_pin_get_by_ofw_idx(device_t consumer, phandle_t node, int idx, gpio_pin_t *gpio); int gpio_pin_get_by_ofw_property(device_t consumer, phandle_t node, char *name, gpio_pin_t *gpio); int gpio_pin_get_by_ofw_propidx(device_t consumer, phandle_t node, char *name, int idx, gpio_pin_t *gpio); +#endif /* FDT */ + +/* Acquire a pin by bus and pin number. */ +int gpio_pin_get_by_bus_pinnum(device_t _bus, uint32_t _pinnum, gpio_pin_t *_gp); + +/* Acquire a pin by child and index (used by direct children of gpiobus). */ +int gpio_pin_get_by_child_index(device_t _child, uint32_t _idx, gpio_pin_t *_gp); + +/* Release a pin acquired via any gpio_pin_get_xxx() function. */ void gpio_pin_release(gpio_pin_t gpio); + +/* Work with gpio pins acquired using the functions above. */ int gpio_pin_getcaps(gpio_pin_t pin, uint32_t *caps); int gpio_pin_is_active(gpio_pin_t pin, bool *active); int gpio_pin_set_active(gpio_pin_t pin, bool active); int gpio_pin_setflags(gpio_pin_t pin, uint32_t flags); -#endif struct resource *gpio_alloc_intr_resource(device_t consumer_dev, int *rid, u_int alloc_flags, gpio_pin_t pin, uint32_t intr_mode); + +/* + * Functions shared between gpiobus and other bus classes that derive from it; + * these should not be called directly by other drivers. + */ int gpio_check_flags(uint32_t, uint32_t); device_t gpiobus_attach_bus(device_t); int gpiobus_detach_bus(device_t); int gpiobus_init_softc(device_t); int gpiobus_alloc_ivars(struct gpiobus_ivar *); void gpiobus_free_ivars(struct gpiobus_ivar *); int gpiobus_acquire_pin(device_t, uint32_t); int gpiobus_release_pin(device_t, uint32_t); extern driver_t gpiobus_driver; #endif /* __GPIOBUS_H__ */ Index: head/sys/dev/gpio/ofw_gpiobus.c =================================================================== --- head/sys/dev/gpio/ofw_gpiobus.c (revision 355273) +++ head/sys/dev/gpio/ofw_gpiobus.c (revision 355274) @@ -1,593 +1,515 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2009, Nathan Whitehorn * Copyright (c) 2013, Luiz Otavio O Souza * Copyright (c) 2013 The FreeBSD Foundation * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice unmodified, this list of conditions, and the following * disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include "gpiobus_if.h" -#define GPIO_ACTIVE_LOW 1 - static struct ofw_gpiobus_devinfo *ofw_gpiobus_setup_devinfo(device_t, device_t, phandle_t); static void ofw_gpiobus_destroy_devinfo(device_t, struct ofw_gpiobus_devinfo *); static int ofw_gpiobus_parse_gpios_impl(device_t, phandle_t, char *, struct gpiobus_softc *, struct gpiobus_pin **); /* * Utility functions for easier handling of OFW GPIO pins. * * !!! BEWARE !!! * GPIOBUS uses children's IVARs, so we cannot use this interface for cross * tree consumers. * */ int gpio_pin_get_by_ofw_propidx(device_t consumer, phandle_t cnode, char *prop_name, int idx, gpio_pin_t *out_pin) { phandle_t xref; pcell_t *cells; device_t busdev; struct gpiobus_pin pin; int ncells, rv; KASSERT(consumer != NULL && cnode > 0, ("both consumer and cnode required")); rv = ofw_bus_parse_xref_list_alloc(cnode, prop_name, "#gpio-cells", idx, &xref, &ncells, &cells); if (rv != 0) return (rv); /* Translate provider to device. */ pin.dev = OF_device_from_xref(xref); if (pin.dev == NULL) { OF_prop_free(cells); return (ENODEV); } /* Test if GPIO bus already exist. */ busdev = GPIO_GET_BUS(pin.dev); if (busdev == NULL) { OF_prop_free(cells); return (ENODEV); } /* Map GPIO pin. */ rv = gpio_map_gpios(pin.dev, cnode, OF_node_from_xref(xref), ncells, cells, &pin.pin, &pin.flags); OF_prop_free(cells); if (rv != 0) return (ENXIO); /* Reserve GPIO pin. */ rv = gpiobus_acquire_pin(busdev, pin.pin); if (rv != 0) return (EBUSY); *out_pin = malloc(sizeof(struct gpiobus_pin), M_DEVBUF, M_WAITOK | M_ZERO); **out_pin = pin; return (0); } int gpio_pin_get_by_ofw_idx(device_t consumer, phandle_t node, int idx, gpio_pin_t *pin) { return (gpio_pin_get_by_ofw_propidx(consumer, node, "gpios", idx, pin)); } int gpio_pin_get_by_ofw_property(device_t consumer, phandle_t node, char *name, gpio_pin_t *pin) { return (gpio_pin_get_by_ofw_propidx(consumer, node, name, 0, pin)); } int gpio_pin_get_by_ofw_name(device_t consumer, phandle_t node, char *name, gpio_pin_t *pin) { int rv, idx; KASSERT(consumer != NULL && node > 0, ("both consumer and node required")); rv = ofw_bus_find_string_index(node, "gpio-names", name, &idx); if (rv != 0) return (rv); return (gpio_pin_get_by_ofw_idx(consumer, node, idx, pin)); -} - -void -gpio_pin_release(gpio_pin_t gpio) -{ - device_t busdev; - - if (gpio == NULL) - return; - - KASSERT(gpio->dev != NULL, ("invalid pin state")); - - busdev = GPIO_GET_BUS(gpio->dev); - if (busdev != NULL) - gpiobus_release_pin(busdev, gpio->pin); - - /* XXXX Unreserve pin. */ - free(gpio, M_DEVBUF); -} - -int -gpio_pin_getcaps(gpio_pin_t pin, uint32_t *caps) -{ - - KASSERT(pin != NULL, ("GPIO pin is NULL.")); - KASSERT(pin->dev != NULL, ("GPIO pin device is NULL.")); - return (GPIO_PIN_GETCAPS(pin->dev, pin->pin, caps)); -} - -int -gpio_pin_is_active(gpio_pin_t pin, bool *active) -{ - int rv; - uint32_t tmp; - - KASSERT(pin != NULL, ("GPIO pin is NULL.")); - KASSERT(pin->dev != NULL, ("GPIO pin device is NULL.")); - rv = GPIO_PIN_GET(pin->dev, pin->pin, &tmp); - if (rv != 0) { - return (rv); - } - - if (pin->flags & GPIO_ACTIVE_LOW) - *active = tmp == 0; - else - *active = tmp != 0; - return (0); -} - -int -gpio_pin_set_active(gpio_pin_t pin, bool active) -{ - int rv; - uint32_t tmp; - - if (pin->flags & GPIO_ACTIVE_LOW) - tmp = active ? 0 : 1; - else - tmp = active ? 1 : 0; - - KASSERT(pin != NULL, ("GPIO pin is NULL.")); - KASSERT(pin->dev != NULL, ("GPIO pin device is NULL.")); - rv = GPIO_PIN_SET(pin->dev, pin->pin, tmp); - return (rv); -} - -int -gpio_pin_setflags(gpio_pin_t pin, uint32_t flags) -{ - int rv; - - KASSERT(pin != NULL, ("GPIO pin is NULL.")); - KASSERT(pin->dev != NULL, ("GPIO pin device is NULL.")); - - rv = GPIO_PIN_SETFLAGS(pin->dev, pin->pin, flags); - return (rv); } /* * OFW_GPIOBUS driver. */ device_t ofw_gpiobus_add_fdt_child(device_t bus, const char *drvname, phandle_t child) { device_t childdev; int i; struct gpiobus_ivar *devi; struct ofw_gpiobus_devinfo *dinfo; /* * Check to see if we already have a child for @p child, and if so * return it. */ childdev = ofw_bus_find_child_device_by_phandle(bus, child); if (childdev != NULL) return (childdev); /* * Set up the GPIO child and OFW bus layer devinfo and add it to bus. */ childdev = device_add_child(bus, drvname, -1); if (childdev == NULL) return (NULL); dinfo = ofw_gpiobus_setup_devinfo(bus, childdev, child); if (dinfo == NULL) { device_delete_child(bus, childdev); return (NULL); } if (device_probe_and_attach(childdev) != 0) { ofw_gpiobus_destroy_devinfo(bus, dinfo); device_delete_child(bus, childdev); return (NULL); } /* Use the child name as pin name. */ devi = &dinfo->opd_dinfo; for (i = 0; i < devi->npins; i++) GPIOBUS_PIN_SETNAME(bus, devi->pins[i], device_get_nameunit(childdev)); return (childdev); } int ofw_gpiobus_parse_gpios(device_t consumer, char *pname, struct gpiobus_pin **pins) { return (ofw_gpiobus_parse_gpios_impl(consumer, ofw_bus_get_node(consumer), pname, NULL, pins)); } void ofw_gpiobus_register_provider(device_t provider) { phandle_t node; node = ofw_bus_get_node(provider); OF_device_register_xref(OF_xref_from_node(node), provider); } void ofw_gpiobus_unregister_provider(device_t provider) { phandle_t node; node = ofw_bus_get_node(provider); OF_device_register_xref(OF_xref_from_node(node), NULL); } static struct ofw_gpiobus_devinfo * ofw_gpiobus_setup_devinfo(device_t bus, device_t child, phandle_t node) { int i, npins; struct gpiobus_ivar *devi; struct gpiobus_pin *pins; struct gpiobus_softc *sc; struct ofw_gpiobus_devinfo *dinfo; sc = device_get_softc(bus); dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_NOWAIT | M_ZERO); if (dinfo == NULL) return (NULL); if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, node) != 0) { free(dinfo, M_DEVBUF); return (NULL); } /* Parse the gpios property for the child. */ npins = ofw_gpiobus_parse_gpios_impl(child, node, "gpios", sc, &pins); if (npins <= 0) { ofw_bus_gen_destroy_devinfo(&dinfo->opd_obdinfo); free(dinfo, M_DEVBUF); return (NULL); } /* Initialize the irq resource list. */ resource_list_init(&dinfo->opd_dinfo.rl); /* Allocate the child ivars and copy the parsed pin data. */ devi = &dinfo->opd_dinfo; devi->npins = (uint32_t)npins; if (gpiobus_alloc_ivars(devi) != 0) { free(pins, M_DEVBUF); ofw_gpiobus_destroy_devinfo(bus, dinfo); return (NULL); } for (i = 0; i < devi->npins; i++) devi->pins[i] = pins[i].pin; free(pins, M_DEVBUF); /* Parse the interrupt resources. */ if (ofw_bus_intr_to_rl(bus, node, &dinfo->opd_dinfo.rl, NULL) != 0) { ofw_gpiobus_destroy_devinfo(bus, dinfo); return (NULL); } device_set_ivars(child, dinfo); return (dinfo); } static void ofw_gpiobus_destroy_devinfo(device_t bus, struct ofw_gpiobus_devinfo *dinfo) { int i; struct gpiobus_ivar *devi; struct gpiobus_softc *sc; sc = device_get_softc(bus); devi = &dinfo->opd_dinfo; for (i = 0; i < devi->npins; i++) { if (devi->pins[i] > sc->sc_npins) continue; sc->sc_pins[devi->pins[i]].mapped = 0; } gpiobus_free_ivars(devi); resource_list_free(&dinfo->opd_dinfo.rl); ofw_bus_gen_destroy_devinfo(&dinfo->opd_obdinfo); free(dinfo, M_DEVBUF); } static int ofw_gpiobus_parse_gpios_impl(device_t consumer, phandle_t cnode, char *pname, struct gpiobus_softc *bussc, struct gpiobus_pin **pins) { int gpiocells, i, j, ncells, npins; pcell_t *gpios; phandle_t gpio; ncells = OF_getencprop_alloc_multi(cnode, pname, sizeof(*gpios), (void **)&gpios); if (ncells == -1) { device_printf(consumer, "Warning: No %s specified in fdt data; " "device may not function.\n", pname); return (-1); } /* * The gpio-specifier is controller independent, the first pcell has * the reference to the GPIO controller phandler. * Count the number of encoded gpio-specifiers on the first pass. */ i = 0; npins = 0; while (i < ncells) { /* Allow NULL specifiers. */ if (gpios[i] == 0) { npins++; i++; continue; } gpio = OF_node_from_xref(gpios[i]); /* If we have bussc, ignore devices from other gpios. */ if (bussc != NULL) if (ofw_bus_get_node(bussc->sc_dev) != gpio) return (0); /* * Check for gpio-controller property and read the #gpio-cells * for this GPIO controller. */ if (!OF_hasprop(gpio, "gpio-controller") || OF_getencprop(gpio, "#gpio-cells", &gpiocells, sizeof(gpiocells)) < 0) { device_printf(consumer, "gpio reference is not a gpio-controller.\n"); OF_prop_free(gpios); return (-1); } if (ncells - i < gpiocells + 1) { device_printf(consumer, "%s cells doesn't match #gpio-cells.\n", pname); return (-1); } npins++; i += gpiocells + 1; } if (npins == 0 || pins == NULL) { if (npins == 0) device_printf(consumer, "no pin specified in %s.\n", pname); OF_prop_free(gpios); return (npins); } *pins = malloc(sizeof(struct gpiobus_pin) * npins, M_DEVBUF, M_NOWAIT | M_ZERO); if (*pins == NULL) { OF_prop_free(gpios); return (-1); } /* Decode the gpio specifier on the second pass. */ i = 0; j = 0; while (i < ncells) { /* Allow NULL specifiers. */ if (gpios[i] == 0) { j++; i++; continue; } gpio = OF_node_from_xref(gpios[i]); /* Read gpio-cells property for this GPIO controller. */ if (OF_getencprop(gpio, "#gpio-cells", &gpiocells, sizeof(gpiocells)) < 0) { device_printf(consumer, "gpio does not have the #gpio-cells property.\n"); goto fail; } /* Return the device reference for the GPIO controller. */ (*pins)[j].dev = OF_device_from_xref(gpios[i]); if ((*pins)[j].dev == NULL) { device_printf(consumer, "no device registered for the gpio controller.\n"); goto fail; } /* * If the gpiobus softc is NULL we use the GPIO_GET_BUS() to * retrieve it. The GPIO_GET_BUS() method is only valid after * the child is probed and attached. */ if (bussc == NULL) { if (GPIO_GET_BUS((*pins)[j].dev) == NULL) { device_printf(consumer, "no gpiobus reference for %s.\n", device_get_nameunit((*pins)[j].dev)); goto fail; } bussc = device_get_softc(GPIO_GET_BUS((*pins)[j].dev)); } /* Get the GPIO pin number and flags. */ if (gpio_map_gpios((*pins)[j].dev, cnode, gpio, gpiocells, &gpios[i + 1], &(*pins)[j].pin, &(*pins)[j].flags) != 0) { device_printf(consumer, "cannot map the gpios specifier.\n"); goto fail; } /* Reserve the GPIO pin. */ if (gpiobus_acquire_pin(bussc->sc_busdev, (*pins)[j].pin) != 0) goto fail; j++; i += gpiocells + 1; } OF_prop_free(gpios); return (npins); fail: OF_prop_free(gpios); free(*pins, M_DEVBUF); return (-1); } static int ofw_gpiobus_probe(device_t dev) { if (ofw_bus_get_node(dev) == -1) return (ENXIO); device_set_desc(dev, "OFW GPIO bus"); return (BUS_PROBE_DEFAULT); } static int ofw_gpiobus_attach(device_t dev) { int err; phandle_t child; err = gpiobus_init_softc(dev); if (err != 0) return (err); bus_generic_probe(dev); bus_enumerate_hinted_children(dev); /* * Attach the children represented in the device tree. */ for (child = OF_child(ofw_bus_get_node(dev)); child != 0; child = OF_peer(child)) { if (OF_hasprop(child, "gpio-hog")) continue; if (!OF_hasprop(child, "gpios")) continue; if (ofw_gpiobus_add_fdt_child(dev, NULL, child) == NULL) continue; } return (bus_generic_attach(dev)); } static device_t ofw_gpiobus_add_child(device_t dev, u_int order, const char *name, int unit) { device_t child; struct ofw_gpiobus_devinfo *devi; child = device_add_child_ordered(dev, order, name, unit); if (child == NULL) return (child); devi = malloc(sizeof(struct ofw_gpiobus_devinfo), M_DEVBUF, M_NOWAIT | M_ZERO); if (devi == NULL) { device_delete_child(dev, child); return (0); } /* * NULL all the OFW-related parts of the ivars for non-OFW * children. */ devi->opd_obdinfo.obd_node = -1; devi->opd_obdinfo.obd_name = NULL; devi->opd_obdinfo.obd_compat = NULL; devi->opd_obdinfo.obd_type = NULL; devi->opd_obdinfo.obd_model = NULL; device_set_ivars(child, devi); return (child); } static const struct ofw_bus_devinfo * ofw_gpiobus_get_devinfo(device_t bus, device_t dev) { struct ofw_gpiobus_devinfo *dinfo; dinfo = device_get_ivars(dev); return (&dinfo->opd_obdinfo); } static device_method_t ofw_gpiobus_methods[] = { /* Device interface */ DEVMETHOD(device_probe, ofw_gpiobus_probe), DEVMETHOD(device_attach, ofw_gpiobus_attach), /* Bus interface */ DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str), DEVMETHOD(bus_add_child, ofw_gpiobus_add_child), /* ofw_bus interface */ DEVMETHOD(ofw_bus_get_devinfo, ofw_gpiobus_get_devinfo), DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), DEVMETHOD_END }; devclass_t ofwgpiobus_devclass; DEFINE_CLASS_1(gpiobus, ofw_gpiobus_driver, ofw_gpiobus_methods, sizeof(struct gpiobus_softc), gpiobus_driver); EARLY_DRIVER_MODULE(ofw_gpiobus, gpio, ofw_gpiobus_driver, ofwgpiobus_devclass, 0, 0, BUS_PASS_BUS); MODULE_VERSION(ofw_gpiobus, 1); MODULE_DEPEND(ofw_gpiobus, gpiobus, 1, 1, 1);