Index: head/sys/dev/gpio/gpiobus.c =================================================================== --- head/sys/dev/gpio/gpiobus.c (revision 274637) +++ head/sys/dev/gpio/gpiobus.c (revision 274638) @@ -1,481 +1,594 @@ /*- * 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 #include #include #include #include "gpiobus_if.h" +#undef GPIOBUS_DEBUG +#ifdef GPIOBUS_DEBUG +#define dprintf printf +#else +#define dprintf(x, arg...) +#endif + 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 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); void gpiobus_print_pins(struct gpiobus_ivar *devi) { int range_start, range_stop, need_coma; int i; 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) printf(","); if (range_start != range_stop) printf("%d-%d", range_start, range_stop); else printf("%d", range_start); range_start = range_stop = devi->pins[i]; need_coma = 1; } else range_stop++; } if (need_coma) printf(","); if (range_start != range_stop) printf("%d-%d", range_start, range_stop); else printf("%d", range_start); } 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_mapped = malloc(sizeof(int) * sc->sc_npins, M_DEVBUF, M_NOWAIT | M_ZERO); if (sc->sc_pins_mapped == NULL) return (ENOMEM); /* Initialize the bus lock. */ GPIOBUS_LOCK_INIT(sc); 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; devi->pins = malloc(sizeof(uint32_t) * devi->npins, M_DEVBUF, M_NOWAIT | M_ZERO); if (!devi->pins) return (ENOMEM); npins = 0; for (i = 0; i < 32; i++) { if ((mask & (1 << i)) == 0) continue; if (i >= sc->sc_npins) { device_printf(child, "invalid pin %d, max: %d\n", i, sc->sc_npins - 1); free(devi->pins, M_DEVBUF); return (EINVAL); } devi->pins[npins++] = i; /* * Mark pin as mapped and give warning if it's already mapped */ if (sc->sc_pins_mapped[i]) { device_printf(child, "warning: pin %d is already mapped\n", i); free(devi->pins, M_DEVBUF); return (EINVAL); } sc->sc_pins_mapped[i] = 1; } 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++) { device_delete_child(dev, devlist[i]); devi = GPIOBUS_IVAR(devlist[i]); if (devi->pins) { free(devi->pins, M_DEVBUF); devi->pins = NULL; } } free(devlist, M_TEMP); if (sc->sc_pins_mapped) { free(sc->sc_pins_mapped, M_DEVBUF); sc->sc_pins_mapped = 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 int gpiobus_print_child(device_t dev, device_t child) { struct gpiobus_ivar *devi = GPIOBUS_IVAR(child); int retval = 0; retval += bus_print_child_header(dev, child); retval += printf(" at pin(s) "); gpiobus_print_pins(devi); + resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%ld"); 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) { snprintf(buf, buflen, "pins=?"); 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 (0); } + 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; - int pins; + int irq, pins; - child = BUS_ADD_CHILD(bus, 0, dname, dunit); devi = GPIOBUS_IVAR(child); resource_int_value(dname, dunit, "pins", &pins); if (gpiobus_parse_pins(sc, child, pins)) device_delete_child(bus, child); + 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, + u_long start, u_long 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 struct resource * +gpiobus_alloc_resource(device_t bus, device_t child, int type, int *rid, + u_long start, u_long end, u_long 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 = (start == 0UL && end == ~0UL && 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 (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("gpiobus: releasing unowned bus."); if (sc->sc_owner != child) panic("gpiobus: you don't own the bus. game over."); 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); if (pin >= devi->npins) 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 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_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), /* 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_END }; driver_t gpiobus_driver = { "gpiobus", gpiobus_methods, sizeof(struct gpiobus_softc) }; devclass_t gpiobus_devclass; DRIVER_MODULE(gpiobus, gpio, gpiobus_driver, gpiobus_devclass, 0, 0); MODULE_VERSION(gpiobus, 1); Index: head/sys/dev/gpio/gpiobusvar.h =================================================================== --- head/sys/dev/gpio/gpiobusvar.h (revision 274637) +++ head/sys/dev/gpio/gpiobusvar.h (revision 274638) @@ -1,99 +1,102 @@ /*- * 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 #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 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 */ int *sc_pins_mapped; /* mark mapped pins */ }; struct gpiobus_ivar { + struct resource_list rl; /* isr resource list */ uint32_t npins; /* pins total */ uint32_t *flags; /* pins flags */ uint32_t *pins; /* pins map */ }; #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, phandle_t); #endif void gpiobus_print_pins(struct gpiobus_ivar *); int gpiobus_init_softc(device_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 274637) +++ head/sys/dev/gpio/ofw_gpiobus.c (revision 274638) @@ -1,371 +1,381 @@ /*- * 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 static int ofw_gpiobus_parse_gpios(struct gpiobus_softc *, struct gpiobus_ivar *, phandle_t); static struct ofw_gpiobus_devinfo *ofw_gpiobus_setup_devinfo(device_t, phandle_t); static void ofw_gpiobus_destroy_devinfo(struct ofw_gpiobus_devinfo *); device_t ofw_gpiobus_add_fdt_child(device_t bus, phandle_t child) { struct ofw_gpiobus_devinfo *dinfo; device_t childdev; /* * Set up the GPIO child and OFW bus layer devinfo and add it to bus. */ dinfo = ofw_gpiobus_setup_devinfo(bus, child); if (dinfo == NULL) return (NULL); childdev = device_add_child(bus, NULL, -1); if (childdev == NULL) { device_printf(bus, "could not add child: %s\n", dinfo->opd_obdinfo.obd_name); ofw_gpiobus_destroy_devinfo(dinfo); return (NULL); } device_set_ivars(childdev, dinfo); return (childdev); } static int ofw_gpiobus_alloc_ivars(struct gpiobus_ivar *dinfo) { /* Allocate pins and flags memory. */ dinfo->pins = malloc(sizeof(uint32_t) * dinfo->npins, M_DEVBUF, M_NOWAIT | M_ZERO); if (dinfo->pins == NULL) return (ENOMEM); dinfo->flags = malloc(sizeof(uint32_t) * dinfo->npins, M_DEVBUF, M_NOWAIT | M_ZERO); if (dinfo->flags == NULL) { free(dinfo->pins, M_DEVBUF); return (ENOMEM); } return (0); } static void ofw_gpiobus_free_ivars(struct gpiobus_ivar *dinfo) { free(dinfo->flags, M_DEVBUF); free(dinfo->pins, M_DEVBUF); } static int ofw_gpiobus_parse_gpios(struct gpiobus_softc *sc, struct gpiobus_ivar *dinfo, phandle_t child) { int cells, i, j, len; pcell_t *gpios; phandle_t gpio; /* Retrieve the gpios property. */ if ((len = OF_getproplen(child, "gpios")) < 0) return (EINVAL); gpios = malloc(len, M_DEVBUF, M_NOWAIT | M_ZERO); if (gpios == NULL) return (ENOMEM); if (OF_getencprop(child, "gpios", gpios, len) < 0) { free(gpios, M_DEVBUF); return (EINVAL); } /* * The gpio-specifier is controller independent, but the first pcell * has the reference to the GPIO controller phandler. * One the first pass we count the number of encoded gpio-specifiers. */ i = 0; len /= sizeof(pcell_t); while (i < len) { /* Allow NULL specifiers. */ if (gpios[i] == 0) { dinfo->npins++; i++; continue; } gpio = OF_node_from_xref(gpios[i]); /* Verify if we're attaching to the correct GPIO controller. */ if (!OF_hasprop(gpio, "gpio-controller") || gpio != ofw_bus_get_node(sc->sc_dev)) { free(gpios, M_DEVBUF); return (EINVAL); } /* Read gpio-cells property for this GPIO controller. */ if (OF_getencprop(gpio, "#gpio-cells", &cells, sizeof(cells)) < 0) { free(gpios, M_DEVBUF); return (EINVAL); } dinfo->npins++; i += cells + 1; } if (dinfo->npins == 0) { free(gpios, M_DEVBUF); return (EINVAL); } /* Allocate the child resources. */ if (ofw_gpiobus_alloc_ivars(dinfo) != 0) { free(gpios, M_DEVBUF); return (ENOMEM); } /* Decode the gpio specifier on the second pass. */ i = 0; j = 0; while (i < len) { /* Allow NULL specifiers. */ if (gpios[i] == 0) { i++; j++; continue; } gpio = OF_node_from_xref(gpios[i]); /* Read gpio-cells property for this GPIO controller. */ if (OF_getencprop(gpio, "#gpio-cells", &cells, sizeof(cells)) < 0) { ofw_gpiobus_free_ivars(dinfo); free(gpios, M_DEVBUF); return (EINVAL); } /* Get the GPIO pin number and flags. */ if (gpio_map_gpios(sc->sc_dev, child, gpio, cells, &gpios[i + 1], &dinfo->pins[j], &dinfo->flags[j]) != 0) { ofw_gpiobus_free_ivars(dinfo); free(gpios, M_DEVBUF); return (EINVAL); } /* Consistency check. */ if (dinfo->pins[j] > sc->sc_npins) { device_printf(sc->sc_busdev, "invalid pin %d, max: %d\n", dinfo->pins[j], sc->sc_npins - 1); ofw_gpiobus_free_ivars(dinfo); free(gpios, M_DEVBUF); return (EINVAL); } /* * Mark pin as mapped and give warning if it's already mapped. */ if (sc->sc_pins_mapped[dinfo->pins[j]]) { device_printf(sc->sc_busdev, "warning: pin %d is already mapped\n", dinfo->pins[j]); ofw_gpiobus_free_ivars(dinfo); free(gpios, M_DEVBUF); return (EINVAL); } sc->sc_pins_mapped[dinfo->pins[j]] = 1; i += cells + 1; j++; } free(gpios, M_DEVBUF); return (0); } static struct ofw_gpiobus_devinfo * ofw_gpiobus_setup_devinfo(device_t dev, phandle_t node) { struct gpiobus_softc *sc; struct ofw_gpiobus_devinfo *dinfo; sc = device_get_softc(dev); 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. */ if (ofw_gpiobus_parse_gpios(sc, &dinfo->opd_dinfo, node) != 0) { ofw_bus_gen_destroy_devinfo(&dinfo->opd_obdinfo); free(dinfo, M_DEVBUF); return (NULL); } + /* And now the interrupt resources. */ + resource_list_init(&dinfo->opd_dinfo.rl); + if (ofw_bus_intr_to_rl(dev, node, &dinfo->opd_dinfo.rl) != 0) { + ofw_bus_gen_destroy_devinfo(&dinfo->opd_obdinfo); + free(dinfo, M_DEVBUF); + return (NULL); + } return (dinfo); } static void ofw_gpiobus_destroy_devinfo(struct ofw_gpiobus_devinfo *dinfo) { + resource_list_free(&dinfo->opd_dinfo.rl); ofw_bus_gen_destroy_devinfo(&dinfo->opd_obdinfo); free(dinfo, M_DEVBUF); } 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 (0); } 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 (ofw_gpiobus_add_fdt_child(dev, 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 int ofw_gpiobus_print_child(device_t dev, device_t child) { struct ofw_gpiobus_devinfo *devi; int retval = 0; devi = device_get_ivars(child); retval += bus_print_child_header(dev, child); retval += printf(" at pin(s) "); gpiobus_print_pins(&devi->opd_dinfo); + resource_list_print_type(&devi->opd_dinfo.rl, "irq", SYS_RES_IRQ, + "%ld"); retval += bus_print_child_footer(dev, child); return (retval); } 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_print_child, ofw_gpiobus_print_child), 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 }; static devclass_t ofwgpiobus_devclass; DEFINE_CLASS_1(gpiobus, ofw_gpiobus_driver, ofw_gpiobus_methods, sizeof(struct gpiobus_softc), gpiobus_driver); DRIVER_MODULE(ofw_gpiobus, gpio, ofw_gpiobus_driver, ofwgpiobus_devclass, 0, 0); MODULE_VERSION(ofw_gpiobus, 1); MODULE_DEPEND(ofw_gpiobus, gpiobus, 1, 1, 1);