acpi_lid.c revision 1.23
1/* $NetBSD: acpi_lid.c,v 1.23 2008/02/29 06:35:40 dyoung 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 1.23 2008/02/29 06:35:40 dyoung 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 55struct 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 61static const char * const lid_hid[] = { 62 "PNP0C0D", 63 NULL 64}; 65 66static int acpilid_match(struct device *, struct cfdata *, void *); 67static void acpilid_attach(struct device *, struct device *, void *); 68 69CFATTACH_DECL(acpilid, sizeof(struct acpilid_softc), 70 acpilid_match, acpilid_attach, NULL, NULL); 71 72static void acpilid_status_changed(void *); 73static void acpilid_notify_handler(ACPI_HANDLE, UINT32, void *); 74 75static bool acpilid_suspend(device_t PMF_FN_PROTO); 76 77/* 78 * acpilid_match: 79 * 80 * Autoconfiguration `match' routine. 81 */ 82static int 83acpilid_match(struct device *parent, struct cfdata *match, 84 void *aux) 85{ 86 struct acpi_attach_args *aa = aux; 87 88 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 89 return 0; 90 91 return acpi_match_hid(aa->aa_node->ad_devinfo, lid_hid); 92} 93 94/* 95 * acpilid_attach: 96 * 97 * Autoconfiguration `attach' routine. 98 */ 99static void 100acpilid_attach(struct device *parent, struct device *self, void *aux) 101{ 102 struct acpilid_softc *sc = (void *) self; 103 struct acpi_attach_args *aa = aux; 104 ACPI_STATUS rv; 105 106 aprint_naive(": ACPI Lid Switch\n"); 107 aprint_normal(": ACPI Lid Switch\n"); 108 109 sc->sc_node = aa->aa_node; 110 111 sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname; 112 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID; 113 if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) { 114 aprint_error("%s: unable to register with sysmon\n", 115 sc->sc_dev.dv_xname); 116 return; 117 } 118 119 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 120 ACPI_DEVICE_NOTIFY, acpilid_notify_handler, sc); 121 if (ACPI_FAILURE(rv)) { 122 aprint_error("%s: unable to register DEVICE NOTIFY handler: %s\n", 123 sc->sc_dev.dv_xname, AcpiFormatException(rv)); 124 return; 125 } 126 127 acpi_set_wake_gpe(sc->sc_node->ad_handle); 128 129 if (!pmf_device_register(self, acpilid_suspend, NULL)) 130 aprint_error_dev(self, "couldn't establish power handler\n"); 131} 132 133static void 134acpilid_wake_event(struct acpilid_softc *sc, bool enable) 135{ 136 ACPI_STATUS rv; 137 ACPI_OBJECT_LIST ArgList; 138 ACPI_OBJECT Arg; 139 140 ArgList.Count = 1; 141 ArgList.Pointer = &Arg; 142 143 Arg.Type = ACPI_TYPE_INTEGER; 144 Arg.Integer.Value = enable ? 1 : 0; 145 146 rv = AcpiEvaluateObject (sc->sc_node->ad_handle, "_PSW", 147 &ArgList, NULL); 148 if (ACPI_FAILURE(rv) && rv != AE_NOT_FOUND) 149 aprint_error_dev(&sc->sc_dev, 150 "unable to evaluate _PSW handler: %s\n", 151 AcpiFormatException(rv)); 152} 153 154/* 155 * acpilid_status_changed: 156 * 157 * Get, and possibly display, the lid status, and take action. 158 */ 159static void 160acpilid_status_changed(void *arg) 161{ 162 struct acpilid_softc *sc = arg; 163 ACPI_INTEGER status; 164 ACPI_STATUS rv; 165 166 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &status); 167 if (ACPI_FAILURE(rv)) 168 return; 169 170 sysmon_pswitch_event(&sc->sc_smpsw, status == 0 ? 171 PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED); 172} 173 174/* 175 * acpilid_notify_handler: 176 * 177 * Callback from ACPI interrupt handler to notify us of an event. 178 */ 179static void 180acpilid_notify_handler(ACPI_HANDLE handle, UINT32 notify, 181 void *context) 182{ 183 struct acpilid_softc *sc = context; 184 int rv; 185 186 switch (notify) { 187 case ACPI_NOTIFY_LidStatusChanged: 188#ifdef ACPI_LID_DEBUG 189 printf("%s: received LidStatusChanged message\n", 190 sc->sc_dev.dv_xname); 191#endif 192 rv = AcpiOsExecute(OSL_NOTIFY_HANDLER, 193 acpilid_status_changed, sc); 194 if (ACPI_FAILURE(rv)) 195 printf("%s: WARNING: unable to queue lid change " 196 "callback: %s\n", sc->sc_dev.dv_xname, 197 AcpiFormatException(rv)); 198 break; 199 200 default: 201 printf("%s: received unknown notify message: 0x%x\n", 202 sc->sc_dev.dv_xname, notify); 203 } 204} 205 206static bool 207acpilid_suspend(device_t dv PMF_FN_ARGS) 208{ 209 struct acpilid_softc *sc = device_private(dv); 210 ACPI_INTEGER status; 211 ACPI_STATUS rv; 212 213 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &status); 214 if (ACPI_FAILURE(rv)) 215 return true; 216 217 acpilid_wake_event(sc, status == 0); 218 return true; 219} 220