1 /* $NetBSD: acpi_button.c,v 1.20 2006/02/20 12:17:49 kochi 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 Button driver. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: acpi_button.c,v 1.20 2006/02/20 12:17:49 kochi 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 acpibut_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 int sc_flags; /* see below */ 60 }; 61 62 static const char * const power_button_hid[] = { 63 "PNP0C0C", 64 NULL 65 }; 66 67 static const char * const sleep_button_hid[] = { 68 "PNP0C0E", 69 NULL 70 }; 71 72 #define ACPIBUT_F_VERBOSE 0x01 /* verbose events */ 73 74 static int acpibut_match(struct device *, struct cfdata *, void *); 75 static void acpibut_attach(struct device *, struct device *, void *); 76 77 CFATTACH_DECL(acpibut, sizeof(struct acpibut_softc), 78 acpibut_match, acpibut_attach, NULL, NULL); 79 80 static void acpibut_pressed_event(void *); 81 static void acpibut_notify_handler(ACPI_HANDLE, UINT32, void *); 82 83 /* 84 * acpibut_match: 85 * 86 * Autoconfiguration `match' routine. 87 */ 88 static int 89 acpibut_match(struct device *parent, struct cfdata *match, void *aux) 90 { 91 struct acpi_attach_args *aa = aux; 92 93 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 94 return 0; 95 96 if (acpi_match_hid(aa->aa_node->ad_devinfo, power_button_hid)) 97 return 1; 98 99 if (acpi_match_hid(aa->aa_node->ad_devinfo, sleep_button_hid)) 100 return 1; 101 102 return 0; 103 } 104 105 /* 106 * acpibut_attach: 107 * 108 * Autoconfiguration `attach' routine. 109 */ 110 static void 111 acpibut_attach(struct device *parent, struct device *self, void *aux) 112 { 113 struct acpibut_softc *sc = (void *) self; 114 struct acpi_attach_args *aa = aux; 115 const char *desc; 116 ACPI_STATUS rv; 117 118 sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname; 119 120 if (acpi_match_hid(aa->aa_node->ad_devinfo, power_button_hid)) { 121 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_POWER; 122 desc = "Power"; 123 } else if (acpi_match_hid(aa->aa_node->ad_devinfo, sleep_button_hid)) { 124 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_SLEEP; 125 desc = "Sleep"; 126 } else { 127 printf("\n"); 128 panic("acpibut_attach: impossible"); 129 } 130 131 aprint_naive(": ACPI %s Button\n", desc); 132 aprint_normal(": ACPI %s Button\n", desc); 133 134 sc->sc_node = aa->aa_node; 135 136 if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) { 137 aprint_error("%s: unable to register with sysmon\n", 138 sc->sc_dev.dv_xname); 139 return; 140 } 141 142 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 143 ACPI_DEVICE_NOTIFY, acpibut_notify_handler, sc); 144 if (ACPI_FAILURE(rv)) { 145 aprint_error("%s: unable to register DEVICE NOTIFY handler: %s\n", 146 sc->sc_dev.dv_xname, AcpiFormatException(rv)); 147 return; 148 } 149 150 acpi_set_wake_gpe(sc->sc_node->ad_handle); 151 152 #ifdef ACPI_BUT_DEBUG 153 /* Display the current state when it changes. */ 154 sc->sc_flags = ACPIBUT_F_VERBOSE; 155 #endif 156 } 157 158 /* 159 * acpibut_pressed_event: 160 * 161 * Deal with a button being pressed. 162 */ 163 static void 164 acpibut_pressed_event(void *arg) 165 { 166 struct acpibut_softc *sc = arg; 167 168 if (sc->sc_flags & ACPIBUT_F_VERBOSE) 169 printf("%s: button pressed\n", sc->sc_dev.dv_xname); 170 171 sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED); 172 } 173 174 /* 175 * acpibut_notify_handler: 176 * 177 * Callback from ACPI interrupt handler to notify us of an event. 178 */ 179 static void 180 acpibut_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context) 181 { 182 struct acpibut_softc *sc = context; 183 int rv; 184 185 switch (notify) { 186 case ACPI_NOTIFY_S0PowerButtonPressed: 187 #if 0 188 case ACPI_NOTIFY_S0SleepButtonPressed: /* same as above */ 189 #endif 190 #ifdef ACPI_BUT_DEBUG 191 printf("%s: received ButtonPressed message\n", 192 sc->sc_dev.dv_xname); 193 #endif 194 rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO, 195 acpibut_pressed_event, sc); 196 if (ACPI_FAILURE(rv)) 197 printf("%s: WARNING: unable to queue button pressed " 198 "callback: %s\n", sc->sc_dev.dv_xname, 199 AcpiFormatException(rv)); 200 break; 201 202 /* XXX ACPI_NOTIFY_DeviceWake?? */ 203 204 default: 205 printf("%s: received unknown notify message: 0x%x\n", 206 sc->sc_dev.dv_xname, notify); 207 } 208 } 209