add35ed5b8
to check the status property in their probe routines. Simplebus used to only instantiate its children whose status="okay" but that was improper behavior, fixed in r261352. Now that it doesn't check anymore and probes all its children; the children all have to do the check because really only the children know how to properly interpret their status property strings. Right now all existing drivers only understand "okay" versus something- that's-not-okay, so they all use the new ofw_bus_status_okay() helper.
122 lines
3.7 KiB
C
122 lines
3.7 KiB
C
/*-
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* Copyright (c) 2012 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/condvar.h>
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#include <sys/conf.h>
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#include <sys/bio.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/rman.h>
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#include <sys/systm.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/terasic/de4led/terasic_de4led.h>
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/*
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* Nexus bus attachment for the 8-element LED on the Terasic DE-4 FPGA board,
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* which is hooked up to the processor via a memory-mapped Avalon bus.
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*/
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static int
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terasic_de4led_fdt_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_is_compatible(dev, "sri-cambridge,de4led")) {
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device_set_desc(dev, "Terasic DE4 8-element LED");
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return (BUS_PROBE_DEFAULT);
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}
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return (ENXIO);
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}
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static int
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terasic_de4led_fdt_attach(device_t dev)
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{
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struct terasic_de4led_softc *sc;
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sc = device_get_softc(dev);
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sc->tdl_dev = dev;
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sc->tdl_unit = device_get_unit(dev);
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sc->tdl_rid = 0;
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sc->tdl_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&sc->tdl_rid, RF_ACTIVE);
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if (sc->tdl_res == NULL) {
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device_printf(dev, "couldn't map memory\n");
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return (ENXIO);
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}
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terasic_de4led_attach(sc);
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return (0);
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}
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static int
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terasic_de4led_fdt_detach(device_t dev)
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{
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struct terasic_de4led_softc *sc;
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sc = device_get_softc(dev);
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KASSERT(sc->tdl_res != NULL, ("%s: resources not allocated",
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__func__));
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terasic_de4led_detach(sc);
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bus_release_resource(dev, SYS_RES_MEMORY, sc->tdl_rid, sc->tdl_res);
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return (0);
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}
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static device_method_t terasic_de4led_fdt_methods[] = {
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DEVMETHOD(device_probe, terasic_de4led_fdt_probe),
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DEVMETHOD(device_attach, terasic_de4led_fdt_attach),
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DEVMETHOD(device_detach, terasic_de4led_fdt_detach),
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{ 0, 0 }
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};
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static driver_t terasic_de4led_fdt_driver = {
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"terasic_de4led",
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terasic_de4led_fdt_methods,
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sizeof(struct terasic_de4led_softc),
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};
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DRIVER_MODULE(terasic_de4led, simplebus, terasic_de4led_fdt_driver,
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terasic_de4led_devclass, 0, 0);
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