1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (C) 2002 Benno Rice. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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. 15 * 16 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include "opt_ddb.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kdb.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/malloc.h> 38 #include <sys/bus.h> 39 #include <machine/bus.h> 40 #include <sys/rman.h> 41 42 #include <machine/resource.h> 43 44 #include <dev/ofw/ofw_bus.h> 45 #include <dev/ofw/openfirm.h> 46 47 #include <powerpc/powermac/maciovar.h> 48 49 struct pswitch_softc { 50 int sc_irq_rid; 51 struct resource *sc_irq; 52 void *sc_ih; 53 }; 54 55 static int pswitch_probe(device_t); 56 static int pswitch_attach(device_t); 57 58 static int pswitch_intr(void *); 59 60 static device_method_t pswitch_methods[] = { 61 /* Device interface */ 62 DEVMETHOD(device_probe, pswitch_probe), 63 DEVMETHOD(device_attach, pswitch_attach), 64 { 0, 0 } 65 }; 66 67 static driver_t pswitch_driver = { 68 "pswitch", 69 pswitch_methods, 70 sizeof(struct pswitch_softc) 71 }; 72 73 EARLY_DRIVER_MODULE(pswitch, macgpio, pswitch_driver, 0, 0, BUS_PASS_RESOURCE); 74 75 static int 76 pswitch_probe(device_t dev) 77 { 78 const char *type = ofw_bus_get_type(dev); 79 80 if (strcmp(type, "programmer-switch") != 0) 81 return (ENXIO); 82 83 device_set_desc(dev, "GPIO Programmer's Switch"); 84 return (0); 85 } 86 87 static int 88 pswitch_attach(device_t dev) 89 { 90 struct pswitch_softc *sc; 91 92 sc = device_get_softc(dev); 93 94 sc->sc_irq_rid = 0; 95 sc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, 96 &sc->sc_irq_rid, RF_ACTIVE); 97 if (sc->sc_irq == NULL) { 98 device_printf(dev, "could not allocate interrupt\n"); 99 return (ENXIO); 100 } 101 102 if (bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC | INTR_EXCL, 103 pswitch_intr, NULL, dev, &sc->sc_ih) != 0) { 104 device_printf(dev, "could not setup interrupt\n"); 105 bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irq_rid, 106 sc->sc_irq); 107 return (ENXIO); 108 } 109 110 return (0); 111 } 112 113 static int 114 pswitch_intr(void *arg) 115 { 116 device_t dev; 117 118 dev = (device_t)arg; 119 120 kdb_enter(KDB_WHY_POWERPC, device_get_nameunit(dev)); 121 return (FILTER_HANDLED); 122 } 123