1 /* $NetBSD: acpi_lid.c,v 1.20 2006/10/12 01:30:54 christos Exp $ */ 2 3 /* 4 * Copyright 2001, 2003 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 1.20 2006/10/12 01:30:54 christos 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 #include <dev/sysmon/sysmonvar.h> 54 55 struct acpilid_softc { 56 struct device sc_dev; /* base device glue */ 57 struct acpi_devnode *sc_node; /* our ACPI devnode */ 58 struct sysmon_pswitch sc_smpsw; /* our sysmon glue */ 59 }; 60 61 static const char * const lid_hid[] = { 62 "PNP0C0D", 63 NULL 64 }; 65 66 static int acpilid_match(struct device *, struct cfdata *, void *); 67 static void acpilid_attach(struct device *, struct device *, void *); 68 69 CFATTACH_DECL(acpilid, sizeof(struct acpilid_softc), 70 acpilid_match, acpilid_attach, NULL, NULL); 71 72 static void acpilid_status_changed(void *); 73 static void acpilid_notify_handler(ACPI_HANDLE, UINT32, void *); 74 75 /* 76 * acpilid_match: 77 * 78 * Autoconfiguration `match' routine. 79 */ 80 static int 81 acpilid_match(struct device *parent __unused, struct cfdata *match __unused, 82 void *aux) 83 { 84 struct acpi_attach_args *aa = aux; 85 86 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 87 return 0; 88 89 return acpi_match_hid(aa->aa_node->ad_devinfo, lid_hid); 90 } 91 92 /* 93 * acpilid_attach: 94 * 95 * Autoconfiguration `attach' routine. 96 */ 97 static void 98 acpilid_attach(struct device *parent __unused, struct device *self, void *aux) 99 { 100 struct acpilid_softc *sc = (void *) self; 101 struct acpi_attach_args *aa = aux; 102 ACPI_STATUS rv; 103 104 aprint_naive(": ACPI Lid Switch\n"); 105 aprint_normal(": ACPI Lid Switch\n"); 106 107 sc->sc_node = aa->aa_node; 108 109 sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname; 110 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID; 111 if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) { 112 aprint_error("%s: unable to register with sysmon\n", 113 sc->sc_dev.dv_xname); 114 return; 115 } 116 117 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 118 ACPI_DEVICE_NOTIFY, acpilid_notify_handler, sc); 119 if (ACPI_FAILURE(rv)) { 120 aprint_error("%s: unable to register DEVICE NOTIFY handler: %s\n", 121 sc->sc_dev.dv_xname, AcpiFormatException(rv)); 122 return; 123 } 124 125 acpi_set_wake_gpe(sc->sc_node->ad_handle); 126 } 127 128 /* 129 * acpilid_status_changed: 130 * 131 * Get, and possibly display, the lid status, and take action. 132 */ 133 static void 134 acpilid_status_changed(void *arg) 135 { 136 struct acpilid_softc *sc = arg; 137 ACPI_INTEGER status; 138 ACPI_STATUS rv; 139 140 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &status); 141 if (ACPI_FAILURE(rv)) 142 return; 143 144 sysmon_pswitch_event(&sc->sc_smpsw, status == 0 ? 145 PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED); 146 } 147 148 /* 149 * acpilid_notify_handler: 150 * 151 * Callback from ACPI interrupt handler to notify us of an event. 152 */ 153 static void 154 acpilid_notify_handler(ACPI_HANDLE handle __unused, UINT32 notify, 155 void *context) 156 { 157 struct acpilid_softc *sc = context; 158 int rv; 159 160 switch (notify) { 161 case ACPI_NOTIFY_LidStatusChanged: 162 #ifdef ACPI_LID_DEBUG 163 printf("%s: received LidStatusChanged message\n", 164 sc->sc_dev.dv_xname); 165 #endif 166 rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO, 167 acpilid_status_changed, sc); 168 if (ACPI_FAILURE(rv)) 169 printf("%s: WARNING: unable to queue lid change " 170 "callback: %s\n", sc->sc_dev.dv_xname, 171 AcpiFormatException(rv)); 172 break; 173 174 default: 175 printf("%s: received unknown notify message: 0x%x\n", 176 sc->sc_dev.dv_xname, notify); 177 } 178 } 179