1 /* $NetBSD: acpi_lid.c,v 1.25 2008/03/26 15:31:59 xtraeme 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 1.25 2008/03/26 15:31:59 xtraeme 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 acpi_devnode *sc_node; /* our ACPI devnode */ 57 struct sysmon_pswitch sc_smpsw; /* our sysmon glue */ 58 }; 59 60 static const char * const lid_hid[] = { 61 "PNP0C0D", 62 NULL 63 }; 64 65 static int acpilid_match(device_t, cfdata_t, void *); 66 static void acpilid_attach(device_t, device_t, void *); 67 68 CFATTACH_DECL_NEW(acpilid, sizeof(struct acpilid_softc), 69 acpilid_match, acpilid_attach, NULL, NULL); 70 71 static void acpilid_status_changed(void *); 72 static void acpilid_notify_handler(ACPI_HANDLE, UINT32, void *); 73 74 static void acpilid_wake_event(device_t, bool); 75 static bool acpilid_suspend(device_t PMF_FN_PROTO); 76 77 /* 78 * acpilid_match: 79 * 80 * Autoconfiguration `match' routine. 81 */ 82 static int 83 acpilid_match(device_t parent, cfdata_t match, void *aux) 84 { 85 struct acpi_attach_args *aa = aux; 86 87 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 88 return 0; 89 90 return acpi_match_hid(aa->aa_node->ad_devinfo, lid_hid); 91 } 92 93 /* 94 * acpilid_attach: 95 * 96 * Autoconfiguration `attach' routine. 97 */ 98 static void 99 acpilid_attach(device_t parent, device_t self, void *aux) 100 { 101 struct acpilid_softc *sc = device_private(self); 102 struct acpi_attach_args *aa = aux; 103 ACPI_STATUS rv; 104 105 aprint_naive(": ACPI Lid Switch\n"); 106 aprint_normal(": ACPI Lid Switch\n"); 107 108 sc->sc_node = aa->aa_node; 109 110 sc->sc_smpsw.smpsw_name = device_xname(self); 111 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID; 112 if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) { 113 aprint_error_dev(self, "unable to register with sysmon\n"); 114 return; 115 } 116 117 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 118 ACPI_DEVICE_NOTIFY, acpilid_notify_handler, self); 119 if (ACPI_FAILURE(rv)) { 120 aprint_error_dev(self, 121 "unable to register DEVICE NOTIFY handler: %s\n", 122 AcpiFormatException(rv)); 123 return; 124 } 125 126 acpi_set_wake_gpe(sc->sc_node->ad_handle); 127 128 if (!pmf_device_register(self, acpilid_suspend, NULL)) 129 aprint_error_dev(self, "couldn't establish power handler\n"); 130 } 131 132 static void 133 acpilid_wake_event(device_t dv, bool enable) 134 { 135 struct acpilid_softc *sc = device_private(dv); 136 137 ACPI_STATUS rv; 138 ACPI_OBJECT_LIST ArgList; 139 ACPI_OBJECT Arg; 140 141 ArgList.Count = 1; 142 ArgList.Pointer = &Arg; 143 144 Arg.Type = ACPI_TYPE_INTEGER; 145 Arg.Integer.Value = enable ? 1 : 0; 146 147 rv = AcpiEvaluateObject(sc->sc_node->ad_handle, "_PSW", 148 &ArgList, NULL); 149 if (ACPI_FAILURE(rv) && rv != AE_NOT_FOUND) 150 aprint_error_dev(dv, 151 "unable to evaluate _PSW handler: %s\n", 152 AcpiFormatException(rv)); 153 } 154 155 /* 156 * acpilid_status_changed: 157 * 158 * Get, and possibly display, the lid status, and take action. 159 */ 160 static void 161 acpilid_status_changed(void *arg) 162 { 163 struct acpilid_softc *sc = arg; 164 ACPI_INTEGER status; 165 ACPI_STATUS rv; 166 167 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &status); 168 if (ACPI_FAILURE(rv)) 169 return; 170 171 sysmon_pswitch_event(&sc->sc_smpsw, status == 0 ? 172 PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED); 173 } 174 175 /* 176 * acpilid_notify_handler: 177 * 178 * Callback from ACPI interrupt handler to notify us of an event. 179 */ 180 static void 181 acpilid_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context) 182 { 183 device_t dv = context; 184 struct acpilid_softc *sc = device_private(dv); 185 int rv; 186 187 switch (notify) { 188 case ACPI_NOTIFY_LidStatusChanged: 189 #ifdef ACPI_LID_DEBUG 190 printf("%s: received LidStatusChanged message\n", 191 device_xname(dv)); 192 #endif 193 rv = AcpiOsExecute(OSL_NOTIFY_HANDLER, 194 acpilid_status_changed, sc); 195 if (ACPI_FAILURE(rv)) 196 aprint_error_dev(dv, 197 "WARNING: unable to queue lid change " 198 "callback: %s\n", AcpiFormatException(rv)); 199 break; 200 201 default: 202 aprint_debug_dev(dv, 203 "received unknown notify message: 0x%x\n", notify); 204 } 205 } 206 207 static bool 208 acpilid_suspend(device_t dv PMF_FN_ARGS) 209 { 210 struct acpilid_softc *sc = device_private(dv); 211 ACPI_INTEGER status; 212 ACPI_STATUS rv; 213 214 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &status); 215 if (ACPI_FAILURE(rv)) 216 return true; 217 218 acpilid_wake_event(dv, status == 0); 219 return true; 220 } 221