1 /* $OpenBSD: sysbutton.c,v 1.6 2017/09/08 05:36:52 deraadt 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/param.h> 19 #include <sys/systm.h> 20 #include <sys/proc.h> 21 #include <sys/device.h> 22 23 #include <ddb/db_var.h> 24 #include <dev/ofw/openfirm.h> 25 26 #include <machine/bus.h> 27 #include <machine/autoconf.h> 28 29 struct sysbutton_softc { 30 struct device sc_dev; 31 int sc_node; 32 int sc_intr; 33 }; 34 35 int sysbutton_match(struct device *, void *, void *); 36 void sysbutton_attach(struct device *, struct device *, void *); 37 int sysbutton_intr(void *); 38 39 struct cfattach sysbutton_ca = { 40 sizeof(struct sysbutton_softc), sysbutton_match, 41 sysbutton_attach 42 }; 43 44 struct cfdriver sysbutton_cd = { 45 NULL, "sysbutton", DV_DULL 46 }; 47 48 int 49 sysbutton_match(struct device *parent, void *arg, void *aux) 50 { 51 struct confargs *ca = aux; 52 53 if (strcmp(ca->ca_name, "indicatorSwitch-gpio") == 0) 54 return 1; 55 56 return 0; 57 } 58 59 void 60 sysbutton_attach(struct device *parent, struct device *self, void *aux) 61 { 62 struct sysbutton_softc *sc = (struct sysbutton_softc *)self; 63 struct confargs *ca = aux; 64 int intr[2]; 65 66 sc->sc_node = ca->ca_node; 67 68 OF_getprop(sc->sc_node, "interrupts", intr, sizeof(intr)); 69 sc->sc_intr = intr[0]; 70 71 printf(": irq %d\n", sc->sc_intr); 72 73 mac_intr_establish(parent, sc->sc_intr, IST_EDGE, 74 IPL_NONE, sysbutton_intr, sc, sc->sc_dev.dv_xname); 75 } 76 77 int 78 sysbutton_intr(void *v) 79 { 80 81 /* 82 * XXX: Holding this button causes an interrupt storm if 83 * ddb.console=0. 84 */ 85 #ifdef DDB 86 if (db_console) 87 db_enter(); 88 #endif 89 90 return 1; 91 } 92