1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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/openfirm.h> 45 46 #include <powerpc/powermac/maciovar.h> 47 48 struct pswitch_softc { 49 int sc_irqrid; 50 struct resource *sc_irq; 51 void *sc_ih; 52 }; 53 54 static int pswitch_probe(device_t); 55 static int pswitch_attach(device_t); 56 57 static int pswitch_intr(void *); 58 59 static device_method_t pswitch_methods[] = { 60 /* Device interface */ 61 DEVMETHOD(device_probe, pswitch_probe), 62 DEVMETHOD(device_attach, pswitch_attach), 63 64 { 0, 0 } 65 }; 66 67 static driver_t pswitch_driver = { 68 "pswitch", 69 pswitch_methods, 70 sizeof(struct pswitch_softc) 71 }; 72 73 static devclass_t pswitch_devclass; 74 75 DRIVER_MODULE(pswitch, macio, pswitch_driver, pswitch_devclass, 0, 0); 76 77 static int 78 pswitch_probe(device_t dev) 79 { 80 char *type = macio_get_devtype(dev); 81 82 if (strcmp(type, "gpio") != 0) 83 return (ENXIO); 84 85 device_set_desc(dev, "GPIO Programmer's Switch"); 86 return (0); 87 } 88 89 static int 90 pswitch_attach(device_t dev) 91 { 92 struct pswitch_softc *sc; 93 phandle_t node, child; 94 char type[32]; 95 u_int irq[2]; 96 97 sc = device_get_softc(dev); 98 node = macio_get_node(dev); 99 100 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 101 if (OF_getprop(child, "device_type", type, 32) == -1) 102 continue; 103 104 if (strcmp(type, "programmer-switch") == 0) 105 break; 106 } 107 108 if (child == 0) { 109 device_printf(dev, "could not find correct node\n"); 110 return (ENXIO); 111 } 112 113 if (OF_getprop(child, "interrupts", irq, sizeof(irq)) == -1) { 114 device_printf(dev, "could not get interrupt\n"); 115 return (ENXIO); 116 } 117 118 sc->sc_irqrid = 0; 119 sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->sc_irqrid, 120 irq[0], irq[0], 1, RF_ACTIVE); 121 if (sc->sc_irq == NULL) { 122 device_printf(dev, "could not allocate interrupt\n"); 123 return (ENXIO); 124 } 125 126 if (bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC, 127 pswitch_intr, NULL, dev, &sc->sc_ih) != 0) { 128 device_printf(dev, "could not setup interrupt\n"); 129 bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irqrid, 130 sc->sc_irq); 131 return (ENXIO); 132 } 133 134 return (0); 135 } 136 137 static int 138 pswitch_intr(void *arg) 139 { 140 device_t dev; 141 142 dev = (device_t)arg; 143 144 kdb_enter(KDB_WHY_POWERPC, device_get_nameunit(dev)); 145 return (FILTER_HANDLED); 146 } 147