acpi_lid.c revision 1.31
1/* $NetBSD: acpi_lid.c,v 1.31 2010/01/08 20:40:41 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 1.31 2010/01/08 20:40:41 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 acpi_devnode *sc_node; /* our ACPI devnode */ 57 struct sysmon_pswitch sc_smpsw; /* our sysmon glue */ 58}; 59 60static const char * const lid_hid[] = { 61 "PNP0C0D", 62 NULL 63}; 64 65static int acpilid_match(device_t, cfdata_t, void *); 66static void acpilid_attach(device_t, device_t, void *); 67static int acpilid_detach(device_t, int); 68 69CFATTACH_DECL_NEW(acpilid, sizeof(struct acpilid_softc), 70 acpilid_match, acpilid_attach, acpilid_detach, NULL); 71 72static void acpilid_status_changed(void *); 73static void acpilid_notify_handler(ACPI_HANDLE, UINT32, void *); 74 75static void acpilid_wake_event(device_t, bool); 76static bool acpilid_suspend(device_t, pmf_qual_t); 77 78/* 79 * acpilid_match: 80 * 81 * Autoconfiguration `match' routine. 82 */ 83static int 84acpilid_match(device_t parent, cfdata_t match, 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(device_t parent, device_t self, void *aux) 101{ 102 struct acpilid_softc *sc = device_private(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 = device_xname(self); 112 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID; 113 if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) { 114 aprint_error_dev(self, "unable to register with sysmon\n"); 115 return; 116 } 117 118 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 119 ACPI_DEVICE_NOTIFY, acpilid_notify_handler, self); 120 if (ACPI_FAILURE(rv)) { 121 aprint_error_dev(self, 122 "unable to register DEVICE NOTIFY handler: %s\n", 123 AcpiFormatException(rv)); 124 return; 125 } 126 127 if (!pmf_device_register(self, acpilid_suspend, NULL)) 128 aprint_error_dev(self, "couldn't establish power handler\n"); 129} 130 131static int 132acpilid_detach(device_t self, int flags) 133{ 134 struct acpilid_softc *sc = device_private(self); 135 ACPI_STATUS rv; 136 137 rv = AcpiRemoveNotifyHandler(sc->sc_node->ad_handle, 138 ACPI_DEVICE_NOTIFY, acpilid_notify_handler); 139 if (ACPI_FAILURE(rv)) { 140 aprint_error_dev(self, 141 "unable to deregister DEVICE NOTIFY handler: %s\n", 142 AcpiFormatException(rv)); 143 return EBUSY; 144 } 145 146 pmf_device_deregister(self); 147 sysmon_pswitch_unregister(&sc->sc_smpsw); 148 149 return 0; 150} 151 152static void 153acpilid_wake_event(device_t dv, bool enable) 154{ 155 struct acpilid_softc *sc = device_private(dv); 156 ACPI_OBJECT_LIST arg; 157 ACPI_OBJECT obj[3]; 158 ACPI_STATUS rv; 159 160 /* 161 * First try to call the Device Sleep Wake control method, _DSW. 162 * Only if this is not available, resort to to the Power State 163 * Wake control method, _PSW, which was deprecated in ACPI 3.0. 164 */ 165 obj[0].Integer.Value = enable ? 1 : 0; 166 obj[1].Integer.Value = obj[2].Integer.Value = 0; 167 obj[0].Type = obj[1].Type = obj[2].Type = ACPI_TYPE_INTEGER; 168 169 arg.Count = 3; 170 arg.Pointer = obj; 171 172 rv = AcpiEvaluateObject(sc->sc_node->ad_handle, "_DSW", &arg, NULL); 173 174 if (ACPI_SUCCESS(rv)) 175 return; 176 177 if (rv != AE_NOT_FOUND) 178 goto fail; 179 180 rv = acpi_eval_set_integer(sc->sc_node->ad_handle, "_PSW", 181 enable ? 1 : 0); 182 183 if (ACPI_FAILURE(rv) && rv != AE_NOT_FOUND) 184 goto fail; 185 186 return; 187 188fail: 189 aprint_error_dev(dv, "unable to evaluate wake control method: %s\n", 190 AcpiFormatException(rv)); 191} 192 193/* 194 * acpilid_status_changed: 195 * 196 * Get, and possibly display, the lid status, and take action. 197 */ 198static void 199acpilid_status_changed(void *arg) 200{ 201 struct acpilid_softc *sc = arg; 202 ACPI_INTEGER status; 203 ACPI_STATUS rv; 204 205 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &status); 206 if (ACPI_FAILURE(rv)) 207 return; 208 209 sysmon_pswitch_event(&sc->sc_smpsw, status == 0 ? 210 PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED); 211} 212 213/* 214 * acpilid_notify_handler: 215 * 216 * Callback from ACPI interrupt handler to notify us of an event. 217 */ 218static void 219acpilid_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context) 220{ 221 device_t dv = context; 222 struct acpilid_softc *sc = device_private(dv); 223 ACPI_STATUS rv; 224 225 switch (notify) { 226 case ACPI_NOTIFY_LidStatusChanged: 227#ifdef ACPI_LID_DEBUG 228 printf("%s: received LidStatusChanged message\n", 229 device_xname(dv)); 230#endif 231 rv = AcpiOsExecute(OSL_NOTIFY_HANDLER, 232 acpilid_status_changed, sc); 233 if (ACPI_FAILURE(rv)) 234 aprint_error_dev(dv, 235 "WARNING: unable to queue lid change " 236 "callback: %s\n", AcpiFormatException(rv)); 237 break; 238 239 default: 240 aprint_debug_dev(dv, 241 "received unknown notify message: 0x%x\n", notify); 242 } 243} 244 245static bool 246acpilid_suspend(device_t dv, pmf_qual_t qual) 247{ 248 struct acpilid_softc *sc = device_private(dv); 249 ACPI_INTEGER status; 250 ACPI_STATUS rv; 251 252 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &status); 253 if (ACPI_FAILURE(rv)) 254 return true; 255 256 acpilid_wake_event(dv, status == 0); 257 return true; 258} 259