1 /* $OpenBSD: sysbutton.c,v 1.4 2008/06/13 00:31:09 krw Exp $ */ 2 /* 3 * Copyright (c) 2007 Gordon Willem Klok <gwk@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <sys/types.h> 19 #include <sys/param.h> 20 #include <sys/systm.h> 21 #include <sys/proc.h> 22 #include <sys/device.h> 23 24 #include <ddb/db_var.h> 25 #include <dev/ofw/openfirm.h> 26 27 #include <machine/bus.h> 28 #include <machine/autoconf.h> 29 30 struct sysbutton_softc { 31 struct device sc_dev; 32 int sc_node; 33 int sc_intr; 34 }; 35 36 int sysbutton_match(struct device *, void *, void *); 37 void sysbutton_attach(struct device *, struct device *, void *); 38 int sysbutton_intr(void *); 39 40 struct cfattach sysbutton_ca = { 41 sizeof(struct sysbutton_softc), sysbutton_match, 42 sysbutton_attach 43 }; 44 45 struct cfdriver sysbutton_cd = { 46 NULL, "sysbutton", DV_DULL 47 }; 48 49 int 50 sysbutton_match(struct device *parent, void *arg, void *aux) 51 { 52 struct confargs *ca = aux; 53 54 if (strcmp(ca->ca_name, "indicatorSwitch-gpio") == 0) 55 return 1; 56 57 return 0; 58 } 59 60 void 61 sysbutton_attach(struct device *parent, struct device *self, void *aux) 62 { 63 struct sysbutton_softc *sc = (struct sysbutton_softc *)self; 64 struct confargs *ca = aux; 65 int intr[2]; 66 67 sc->sc_node = ca->ca_node; 68 69 OF_getprop(sc->sc_node, "interrupts", intr, sizeof(intr)); 70 sc->sc_intr = intr[0]; 71 72 printf(": irq %d\n", sc->sc_intr); 73 74 mac_intr_establish(parent, sc->sc_intr, IST_EDGE, 75 IPL_NONE, sysbutton_intr, sc, sc->sc_dev.dv_xname); 76 } 77 78 int 79 sysbutton_intr(void *v) 80 { 81 82 /* 83 * XXX: Holding this button causes an interrupt storm if 84 * ddb.console=0. 85 */ 86 #ifdef DDB 87 if (db_console) 88 Debugger(); 89 #endif 90 91 return 1; 92 } 93