acpi_lid.c revision 1.32
1/* $NetBSD: acpi_lid.c,v 1.32 2010/01/30 18:35:48 jruoho 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 1.32 2010/01/30 18:35:48 jruoho 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#define _COMPONENT ACPI_LID_COMPONENT 56ACPI_MODULE_NAME ("acpi_lid") 57 58struct acpilid_softc { 59 struct acpi_devnode *sc_node; /* our ACPI devnode */ 60 struct sysmon_pswitch sc_smpsw; /* our sysmon glue */ 61}; 62 63static const char * const lid_hid[] = { 64 "PNP0C0D", 65 NULL 66}; 67 68static int acpilid_match(device_t, cfdata_t, void *); 69static void acpilid_attach(device_t, device_t, void *); 70static int acpilid_detach(device_t, int); 71 72CFATTACH_DECL_NEW(acpilid, sizeof(struct acpilid_softc), 73 acpilid_match, acpilid_attach, acpilid_detach, NULL); 74 75static void acpilid_status_changed(void *); 76static void acpilid_notify_handler(ACPI_HANDLE, UINT32, void *); 77 78static void acpilid_wake_event(device_t, bool); 79static bool acpilid_suspend(device_t, pmf_qual_t); 80 81/* 82 * acpilid_match: 83 * 84 * Autoconfiguration `match' routine. 85 */ 86static int 87acpilid_match(device_t parent, cfdata_t match, void *aux) 88{ 89 struct acpi_attach_args *aa = aux; 90 91 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 92 return 0; 93 94 return acpi_match_hid(aa->aa_node->ad_devinfo, lid_hid); 95} 96 97/* 98 * acpilid_attach: 99 * 100 * Autoconfiguration `attach' routine. 101 */ 102static void 103acpilid_attach(device_t parent, device_t self, void *aux) 104{ 105 struct acpilid_softc *sc = device_private(self); 106 struct acpi_attach_args *aa = aux; 107 ACPI_STATUS rv; 108 109 aprint_naive(": ACPI Lid Switch\n"); 110 aprint_normal(": ACPI Lid Switch\n"); 111 112 sc->sc_node = aa->aa_node; 113 114 sc->sc_smpsw.smpsw_name = device_xname(self); 115 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID; 116 if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) { 117 aprint_error_dev(self, "unable to register with sysmon\n"); 118 return; 119 } 120 121 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 122 ACPI_DEVICE_NOTIFY, acpilid_notify_handler, self); 123 if (ACPI_FAILURE(rv)) { 124 aprint_error_dev(self, 125 "unable to register DEVICE NOTIFY handler: %s\n", 126 AcpiFormatException(rv)); 127 return; 128 } 129 130 if (!pmf_device_register(self, acpilid_suspend, NULL)) 131 aprint_error_dev(self, "couldn't establish power handler\n"); 132} 133 134static int 135acpilid_detach(device_t self, int flags) 136{ 137 struct acpilid_softc *sc = device_private(self); 138 ACPI_STATUS rv; 139 140 rv = AcpiRemoveNotifyHandler(sc->sc_node->ad_handle, 141 ACPI_DEVICE_NOTIFY, acpilid_notify_handler); 142 if (ACPI_FAILURE(rv)) { 143 aprint_error_dev(self, 144 "unable to deregister DEVICE NOTIFY handler: %s\n", 145 AcpiFormatException(rv)); 146 return EBUSY; 147 } 148 149 pmf_device_deregister(self); 150 sysmon_pswitch_unregister(&sc->sc_smpsw); 151 152 return 0; 153} 154 155static void 156acpilid_wake_event(device_t dv, bool enable) 157{ 158 struct acpilid_softc *sc = device_private(dv); 159 ACPI_OBJECT_LIST arg; 160 ACPI_OBJECT obj[3]; 161 ACPI_STATUS rv; 162 163 /* 164 * First try to call the Device Sleep Wake control method, _DSW. 165 * Only if this is not available, resort to to the Power State 166 * Wake control method, _PSW, which was deprecated in ACPI 3.0. 167 */ 168 obj[0].Integer.Value = enable ? 1 : 0; 169 obj[1].Integer.Value = obj[2].Integer.Value = 0; 170 obj[0].Type = obj[1].Type = obj[2].Type = ACPI_TYPE_INTEGER; 171 172 arg.Count = 3; 173 arg.Pointer = obj; 174 175 rv = AcpiEvaluateObject(sc->sc_node->ad_handle, "_DSW", &arg, NULL); 176 177 if (ACPI_SUCCESS(rv)) 178 return; 179 180 if (rv != AE_NOT_FOUND) 181 goto fail; 182 183 rv = acpi_eval_set_integer(sc->sc_node->ad_handle, "_PSW", 184 enable ? 1 : 0); 185 186 if (ACPI_FAILURE(rv) && rv != AE_NOT_FOUND) 187 goto fail; 188 189 return; 190 191fail: 192 aprint_error_dev(dv, "unable to evaluate wake control method: %s\n", 193 AcpiFormatException(rv)); 194} 195 196/* 197 * acpilid_status_changed: 198 * 199 * Get, and possibly display, the lid status, and take action. 200 */ 201static void 202acpilid_status_changed(void *arg) 203{ 204 struct acpilid_softc *sc = arg; 205 ACPI_INTEGER status; 206 ACPI_STATUS rv; 207 208 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &status); 209 if (ACPI_FAILURE(rv)) 210 return; 211 212 sysmon_pswitch_event(&sc->sc_smpsw, status == 0 ? 213 PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED); 214} 215 216/* 217 * acpilid_notify_handler: 218 * 219 * Callback from ACPI interrupt handler to notify us of an event. 220 */ 221static void 222acpilid_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context) 223{ 224 device_t dv = context; 225 struct acpilid_softc *sc = device_private(dv); 226 ACPI_STATUS rv; 227 228 switch (notify) { 229 case ACPI_NOTIFY_LidStatusChanged: 230#ifdef ACPI_LID_DEBUG 231 printf("%s: received LidStatusChanged message\n", 232 device_xname(dv)); 233#endif 234 rv = AcpiOsExecute(OSL_NOTIFY_HANDLER, 235 acpilid_status_changed, sc); 236 if (ACPI_FAILURE(rv)) 237 aprint_error_dev(dv, 238 "WARNING: unable to queue lid change " 239 "callback: %s\n", AcpiFormatException(rv)); 240 break; 241 242 default: 243 aprint_debug_dev(dv, 244 "received unknown notify message: 0x%x\n", notify); 245 } 246} 247 248static bool 249acpilid_suspend(device_t dv, pmf_qual_t qual) 250{ 251 struct acpilid_softc *sc = device_private(dv); 252 ACPI_INTEGER status; 253 ACPI_STATUS rv; 254 255 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &status); 256 if (ACPI_FAILURE(rv)) 257 return true; 258 259 acpilid_wake_event(dv, status == 0); 260 return true; 261} 262