1 /* 2 * Copyright (C) 2002 Benno Rice. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #include <sys/param.h> 29 #include <sys/systm.h> 30 #include <sys/kernel.h> 31 #include <sys/malloc.h> 32 #include <sys/bus.h> 33 #include <machine/bus.h> 34 #include <sys/rman.h> 35 36 #include <machine/resource.h> 37 38 #include <dev/ofw/openfirm.h> 39 40 #include <powerpc/powermac/maciovar.h> 41 42 struct pswitch_softc { 43 int sc_irqrid; 44 struct resource *sc_irq; 45 void *sc_ih; 46 }; 47 48 static int pswitch_probe(device_t); 49 static int pswitch_attach(device_t); 50 51 static void pswitch_intr(void *); 52 53 static device_method_t pswitch_methods[] = { 54 /* Device interface */ 55 DEVMETHOD(device_probe, pswitch_probe), 56 DEVMETHOD(device_attach, pswitch_attach), 57 58 { 0, 0 } 59 }; 60 61 static driver_t pswitch_driver = { 62 "pswitch", 63 pswitch_methods, 64 sizeof(struct pswitch_softc) 65 }; 66 67 static devclass_t pswitch_devclass; 68 69 DRIVER_MODULE(pswitch, macio, pswitch_driver, pswitch_devclass, 0, 0); 70 71 static int 72 pswitch_probe(device_t dev) 73 { 74 char *type = macio_get_devtype(dev); 75 76 if (strcmp(type, "gpio") != 0) 77 return (ENXIO); 78 79 device_set_desc(dev, "GPIO Programmer's Switch"); 80 return (0); 81 } 82 83 static int 84 pswitch_attach(device_t dev) 85 { 86 struct pswitch_softc *sc; 87 phandle_t node, child; 88 char type[32]; 89 u_int irq[2]; 90 91 sc = device_get_softc(dev); 92 node = macio_get_node(dev); 93 94 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 95 if (OF_getprop(child, "device_type", type, 32) == -1) 96 continue; 97 98 if (strcmp(type, "programmer-switch") == 0) 99 break; 100 } 101 102 if (child == 0) { 103 device_printf(dev, "could not find correct node\n"); 104 return (ENXIO); 105 } 106 107 if (OF_getprop(child, "interrupts", irq, sizeof(irq)) == -1) { 108 device_printf(dev, "could not get interrupt\n"); 109 return (ENXIO); 110 } 111 112 sc->sc_irqrid = 0; 113 sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->sc_irqrid, 114 irq[0], irq[0], 1, RF_ACTIVE); 115 if (sc->sc_irq == NULL) { 116 device_printf(dev, "could not allocate interrupt\n"); 117 return (ENXIO); 118 } 119 120 if (bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC | INTR_FAST, 121 pswitch_intr, dev, &sc->sc_ih) != 0) { 122 device_printf(dev, "could not setup interrupt\n"); 123 bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irqrid, 124 sc->sc_irq); 125 return (ENXIO); 126 } 127 128 return (0); 129 } 130 131 static void 132 pswitch_intr(void *arg) 133 { 134 device_t dev; 135 136 dev = (device_t)arg; 137 138 #ifdef DDB 139 Debugger(device_get_nameunit(dev)); 140 #else 141 device_printf(dev, "close, but no debugger\n"); 142 #endif 143 } 144