1 /* $NetBSD: acpi_lid.c,v 1.3 2001/11/13 13:01:57 lukem 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/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: acpi_lid.c,v 1.3 2001/11/13 13:01:57 lukem Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/device.h> 48 49 #include <dev/acpi/acpica.h> 50 #include <dev/acpi/acpireg.h> 51 #include <dev/acpi/acpivar.h> 52 53 struct acpilid_softc { 54 struct device sc_dev; /* base device glue */ 55 struct acpi_devnode *sc_node; /* our ACPI devnode */ 56 int sc_flags; /* see below */ 57 }; 58 59 #define ACPILID_F_VERBOSE 0x01 /* verbose events */ 60 61 int acpilid_match(struct device *, struct cfdata *, void *); 62 void acpilid_attach(struct device *, struct device *, void *); 63 64 struct cfattach acpilid_ca = { 65 sizeof(struct acpilid_softc), acpilid_match, acpilid_attach, 66 }; 67 68 void acpilid_status_changed(void *); 69 void acpilid_notify_handler(ACPI_HANDLE, UINT32, void *context); 70 71 /* 72 * acpilid_match: 73 * 74 * Autoconfiguration `match' routine. 75 */ 76 int 77 acpilid_match(struct device *parent, struct cfdata *match, void *aux) 78 { 79 struct acpi_attach_args *aa = aux; 80 81 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 82 return (0); 83 84 if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0D") == 0) 85 return (1); 86 87 return (0); 88 } 89 90 /* 91 * acpilid_attach: 92 * 93 * Autoconfiguration `attach' routine. 94 */ 95 void 96 acpilid_attach(struct device *parent, struct device *self, void *aux) 97 { 98 struct acpilid_softc *sc = (void *) self; 99 struct acpi_attach_args *aa = aux; 100 ACPI_STATUS rv; 101 102 printf(": ACPI Lid Switch\n"); 103 104 sc->sc_node = aa->aa_node; 105 106 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 107 ACPI_DEVICE_NOTIFY, acpilid_notify_handler, sc); 108 if (rv != AE_OK) { 109 printf("%s: unable to register device notify handler: %d\n", 110 sc->sc_dev.dv_xname, rv); 111 return; 112 } 113 114 /* Display the current state when it changes. */ 115 sc->sc_flags = ACPILID_F_VERBOSE; 116 } 117 118 /* 119 * acpilid_status_changed: 120 * 121 * Get, and possibly display, the lid status, and take action. 122 */ 123 void 124 acpilid_status_changed(void *arg) 125 { 126 struct acpilid_softc *sc = arg; 127 int status; 128 129 if (acpi_eval_integer(sc->sc_node->ad_handle, "_LID", 130 &status) != AE_OK) 131 return; 132 133 if (sc->sc_flags & ACPILID_F_VERBOSE) 134 printf("%s: Lid %s\n", 135 sc->sc_dev.dv_xname, 136 status == 0 ? "closed " : "open"); 137 138 /* 139 * XXX Perform the appropriate action for the new lid status. 140 */ 141 } 142 143 /* 144 * acpilid_notify_handler: 145 * 146 * Callback from ACPI interrupt handler to notify us of an event. 147 */ 148 void 149 acpilid_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context) 150 { 151 struct acpilid_softc *sc = context; 152 int rv; 153 154 switch (notify) { 155 case ACPI_NOTIFY_LidStatusChanged: 156 #ifdef ACPI_LID_DEBUG 157 printf("%s: received LidStatusChanged message\n", 158 sc->sc_dev.dv_xname); 159 #endif 160 rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO, 161 acpilid_status_changed, sc); 162 if (rv != AE_OK) 163 printf("%s: WARNING: unable to queue lid change " 164 "event: %d\n", sc->sc_dev.dv_xname, rv); 165 break; 166 167 default: 168 printf("%s: received unknown notify message: 0x%x\n", 169 sc->sc_dev.dv_xname, notify); 170 } 171 } 172