1 /* $NetBSD: acpi_lid.c,v 1.2 2001/09/29 05:36:49 thorpej Exp $ */ 2 3 /* 4 * Copyright 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * ACPI Lid Switch driver. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/device.h> 45 46 #include <dev/acpi/acpica.h> 47 #include <dev/acpi/acpireg.h> 48 #include <dev/acpi/acpivar.h> 49 50 struct acpilid_softc { 51 struct device sc_dev; /* base device glue */ 52 struct acpi_devnode *sc_node; /* our ACPI devnode */ 53 int sc_flags; /* see below */ 54 }; 55 56 #define ACPILID_F_VERBOSE 0x01 /* verbose events */ 57 58 int acpilid_match(struct device *, struct cfdata *, void *); 59 void acpilid_attach(struct device *, struct device *, void *); 60 61 struct cfattach acpilid_ca = { 62 sizeof(struct acpilid_softc), acpilid_match, acpilid_attach, 63 }; 64 65 void acpilid_status_changed(void *); 66 void acpilid_notify_handler(ACPI_HANDLE, UINT32, void *context); 67 68 /* 69 * acpilid_match: 70 * 71 * Autoconfiguration `match' routine. 72 */ 73 int 74 acpilid_match(struct device *parent, struct cfdata *match, void *aux) 75 { 76 struct acpi_attach_args *aa = aux; 77 78 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 79 return (0); 80 81 if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0D") == 0) 82 return (1); 83 84 return (0); 85 } 86 87 /* 88 * acpilid_attach: 89 * 90 * Autoconfiguration `attach' routine. 91 */ 92 void 93 acpilid_attach(struct device *parent, struct device *self, void *aux) 94 { 95 struct acpilid_softc *sc = (void *) self; 96 struct acpi_attach_args *aa = aux; 97 ACPI_STATUS rv; 98 99 printf(": ACPI Lid Switch\n"); 100 101 sc->sc_node = aa->aa_node; 102 103 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 104 ACPI_DEVICE_NOTIFY, acpilid_notify_handler, sc); 105 if (rv != AE_OK) { 106 printf("%s: unable to register device notify handler: %d\n", 107 sc->sc_dev.dv_xname, rv); 108 return; 109 } 110 111 /* Display the current state when it changes. */ 112 sc->sc_flags = ACPILID_F_VERBOSE; 113 } 114 115 /* 116 * acpilid_status_changed: 117 * 118 * Get, and possibly display, the lid status, and take action. 119 */ 120 void 121 acpilid_status_changed(void *arg) 122 { 123 struct acpilid_softc *sc = arg; 124 int status; 125 126 if (acpi_eval_integer(sc->sc_node->ad_handle, "_LID", 127 &status) != AE_OK) 128 return; 129 130 if (sc->sc_flags & ACPILID_F_VERBOSE) 131 printf("%s: Lid %s\n", 132 sc->sc_dev.dv_xname, 133 status == 0 ? "closed " : "open"); 134 135 /* 136 * XXX Perform the appropriate action for the new lid status. 137 */ 138 } 139 140 /* 141 * acpilid_notify_handler: 142 * 143 * Callback from ACPI interrupt handler to notify us of an event. 144 */ 145 void 146 acpilid_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context) 147 { 148 struct acpilid_softc *sc = context; 149 int rv; 150 151 switch (notify) { 152 case ACPI_NOTIFY_LidStatusChanged: 153 #ifdef ACPI_LID_DEBUG 154 printf("%s: received LidStatusChanged message\n", 155 sc->sc_dev.dv_xname); 156 #endif 157 rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO, 158 acpilid_status_changed, sc); 159 if (rv != AE_OK) 160 printf("%s: WARNING: unable to queue lid change " 161 "event: %d\n", sc->sc_dev.dv_xname, rv); 162 break; 163 164 default: 165 printf("%s: received unknown notify message: 0x%x\n", 166 sc->sc_dev.dv_xname, notify); 167 } 168 } 169