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 28 #include "opt_ddb.h" 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kdb.h> 33 #include <sys/kernel.h> 34 #include <sys/module.h> 35 #include <sys/malloc.h> 36 #include <sys/bus.h> 37 #include <machine/bus.h> 38 #include <sys/rman.h> 39 40 #include <machine/resource.h> 41 42 #include <dev/ofw/ofw_bus.h> 43 #include <dev/ofw/openfirm.h> 44 45 #include <powerpc/powermac/maciovar.h> 46 47 struct pswitch_softc { 48 int sc_irq_rid; 49 struct resource *sc_irq; 50 void *sc_ih; 51 }; 52 53 static int pswitch_probe(device_t); 54 static int pswitch_attach(device_t); 55 56 static int pswitch_intr(void *); 57 58 static device_method_t pswitch_methods[] = { 59 /* Device interface */ 60 DEVMETHOD(device_probe, pswitch_probe), 61 DEVMETHOD(device_attach, pswitch_attach), 62 { 0, 0 } 63 }; 64 65 static driver_t pswitch_driver = { 66 "pswitch", 67 pswitch_methods, 68 sizeof(struct pswitch_softc) 69 }; 70 71 EARLY_DRIVER_MODULE(pswitch, macgpio, pswitch_driver, 0, 0, BUS_PASS_RESOURCE); 72 73 static int 74 pswitch_probe(device_t dev) 75 { 76 const char *type = ofw_bus_get_type(dev); 77 78 if (strcmp(type, "programmer-switch") != 0) 79 return (ENXIO); 80 81 device_set_desc(dev, "GPIO Programmer's Switch"); 82 return (0); 83 } 84 85 static int 86 pswitch_attach(device_t dev) 87 { 88 struct pswitch_softc *sc; 89 90 sc = device_get_softc(dev); 91 92 sc->sc_irq_rid = 0; 93 sc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, 94 &sc->sc_irq_rid, RF_ACTIVE); 95 if (sc->sc_irq == NULL) { 96 device_printf(dev, "could not allocate interrupt\n"); 97 return (ENXIO); 98 } 99 100 if (bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC | INTR_EXCL, 101 pswitch_intr, NULL, dev, &sc->sc_ih) != 0) { 102 device_printf(dev, "could not setup interrupt\n"); 103 bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irq_rid, 104 sc->sc_irq); 105 return (ENXIO); 106 } 107 108 return (0); 109 } 110 111 static int 112 pswitch_intr(void *arg) 113 { 114 device_t dev; 115 116 dev = (device_t)arg; 117 118 kdb_enter(KDB_WHY_POWERPC, device_get_nameunit(dev)); 119 return (FILTER_HANDLED); 120 } 121