1 /* $OpenBSD: power.c,v 1.9 2022/04/06 18:59:26 naddy 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/param.h> 20 #include <sys/systm.h> 21 #include <sys/kernel.h> 22 #include <sys/device.h> 23 #include <sys/conf.h> 24 #include <sys/proc.h> 25 #include <sys/signalvar.h> 26 27 #include <machine/bus.h> 28 #include <machine/autoconf.h> 29 30 #include <sh/include/devreg.h> 31 32 #include <landisk/landisk/landiskreg.h> 33 #include <landisk/dev/obiovar.h> 34 35 struct power_softc { 36 struct device sc_dev; 37 void *sc_ih; 38 }; 39 40 int power_match(struct device *, void *, void *); 41 void power_attach(struct device *, struct device *, void *); 42 int power_intr(void *aux); 43 44 const struct cfattach power_ca = { 45 sizeof(struct power_softc), 46 power_match, 47 power_attach 48 }; 49 50 struct cfdriver power_cd = { 51 NULL, "power", DV_DULL 52 }; 53 54 struct power_softc *power_softc; 55 56 int 57 power_match(struct device *parent, void *match, void *aux) 58 { 59 struct obio_attach_args *oa = aux; 60 static struct obio_irq power_match_irq; 61 62 oa->oa_nio = 0; 63 oa->oa_niomem = 0; 64 if (oa->oa_nirq == 0) 65 oa->oa_irq = &power_match_irq; 66 oa->oa_nirq = 1; 67 oa->oa_irq[0].or_irq = LANDISK_INTR_PWRSW; 68 69 return (1); 70 } 71 72 void 73 power_attach(struct device *parent, struct device *self, void *aux) 74 { 75 struct power_softc *sc = (void *)self; 76 77 power_softc = sc; 78 79 sc->sc_ih = extintr_establish(LANDISK_INTR_PWRSW, IPL_TTY, 80 power_intr, sc, sc->sc_dev.dv_xname); 81 if (sc->sc_ih == NULL) { 82 printf(": couldn't map interrupt\n"); 83 return; 84 } 85 86 printf("\n"); 87 } 88 89 int 90 power_intr(void *arg) 91 { 92 extern int allowpowerdown; 93 int status; 94 95 status = (int8_t)_reg_read_1(LANDISK_BTNSTAT); 96 if (status == -1) { 97 return (0); 98 } 99 100 status = ~status; 101 if (status & BTN_POWER_BIT) { 102 #ifdef DEBUG 103 printf("%s switched\n", sc->sc_dev.dv_xname); 104 db_enter(); 105 #endif 106 _reg_write_1(LANDISK_PWRSW_INTCLR, 1); 107 if (allowpowerdown == 1) { 108 allowpowerdown = 0; 109 prsignal(initprocess, SIGUSR1); 110 } 111 return (1); 112 } 113 return (0); 114 } 115