1 /* $OpenBSD: power.c,v 1.6 2014/07/11 08:18:30 guenther Exp $ */ 2 3 /* 4 * Copyright (c) 2007 Martin Reindl. 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 #include <sys/param.h> 21 #include <sys/systm.h> 22 #include <sys/kernel.h> 23 #include <sys/device.h> 24 #include <sys/conf.h> 25 #include <sys/proc.h> 26 #include <sys/signalvar.h> 27 28 #include <machine/bus.h> 29 #include <machine/autoconf.h> 30 31 #include <sh/include/devreg.h> 32 33 #include <landisk/landisk/landiskreg.h> 34 #include <landisk/dev/obiovar.h> 35 36 struct power_softc { 37 struct device sc_dev; 38 void *sc_ih; 39 }; 40 41 int power_match(struct device *, void *, void *); 42 void power_attach(struct device *, struct device *, void *); 43 int power_intr(void *aux); 44 45 struct cfattach power_ca = { 46 sizeof(struct power_softc), 47 power_match, 48 power_attach 49 }; 50 51 struct cfdriver power_cd = { 52 NULL, "power", DV_DULL 53 }; 54 55 struct power_softc *power_softc; 56 57 int 58 power_match(struct device *parent, void *match, void *aux) 59 { 60 struct obio_attach_args *oa = aux; 61 static struct obio_irq power_match_irq; 62 63 oa->oa_nio = 0; 64 oa->oa_niomem = 0; 65 if (oa->oa_nirq == 0) 66 oa->oa_irq = &power_match_irq; 67 oa->oa_nirq = 1; 68 oa->oa_irq[0].or_irq = LANDISK_INTR_PWRSW; 69 70 return (1); 71 } 72 73 void 74 power_attach(struct device *parent, struct device *self, void *aux) 75 { 76 struct power_softc *sc = (void *)self; 77 78 power_softc = sc; 79 80 sc->sc_ih = extintr_establish(LANDISK_INTR_PWRSW, IPL_TTY, 81 power_intr, sc, sc->sc_dev.dv_xname); 82 if (sc->sc_ih == NULL) { 83 printf(": couldn't map interrupt\n"); 84 return; 85 } 86 87 printf("\n"); 88 } 89 90 int 91 power_intr(void *arg) 92 { 93 extern int allowpowerdown; 94 int status; 95 96 status = (int8_t)_reg_read_1(LANDISK_BTNSTAT); 97 if (status == -1) { 98 return (0); 99 } 100 101 status = ~status; 102 if (status & BTN_POWER_BIT) { 103 #ifdef DEBUG 104 printf("%s switched\n", sc->sc_dev.dv_xname); 105 Debugger(); 106 #endif 107 _reg_write_1(LANDISK_PWRSW_INTCLR, 1); 108 if (allowpowerdown == 1) { 109 allowpowerdown = 0; 110 prsignal(initprocess, SIGUSR1); 111 } 112 return (1); 113 } 114 return (0); 115 } 116