1 /* $NetBSD: acpi_button.c,v 1.13 2003/11/03 18:07:10 mycroft 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 1.13 2003/11/03 18:07:10 mycroft 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 button_hid[] = { 63 "PNP0C0C", 64 "PNP0C0E", 65 NULL 66 }; 67 68 #define ACPIBUT_F_VERBOSE 0x01 /* verbose events */ 69 70 int acpibut_match(struct device *, struct cfdata *, void *); 71 void acpibut_attach(struct device *, struct device *, void *); 72 73 CFATTACH_DECL(acpibut, sizeof(struct acpibut_softc), 74 acpibut_match, acpibut_attach, NULL, NULL); 75 76 void acpibut_pressed_event(void *); 77 void acpibut_notify_handler(ACPI_HANDLE, UINT32, void *context); 78 79 /* 80 * acpibut_match: 81 * 82 * Autoconfiguration `match' routine. 83 */ 84 int 85 acpibut_match(struct device *parent, struct cfdata *match, void *aux) 86 { 87 struct acpi_attach_args *aa = aux; 88 89 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 90 return (0); 91 92 return (acpi_match_hid(aa->aa_node->ad_devinfo, button_hid)); 93 } 94 95 /* 96 * acpibut_attach: 97 * 98 * Autoconfiguration `attach' routine. 99 */ 100 void 101 acpibut_attach(struct device *parent, struct device *self, void *aux) 102 { 103 struct acpibut_softc *sc = (void *) self; 104 struct acpi_attach_args *aa = aux; 105 const char *desc; 106 ACPI_STATUS rv; 107 108 sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname; 109 110 if (strcmp(aa->aa_node->ad_devinfo->HardwareId.Value, "PNP0C0C") == 0) { 111 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_POWER; 112 desc = "Power"; 113 } else if (strcmp(aa->aa_node->ad_devinfo->HardwareId.Value, "PNP0C0E") == 0) { 114 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_SLEEP; 115 desc = "Sleep"; 116 } else { 117 printf("\n"); 118 panic("acpibut_attach: impossible"); 119 } 120 121 printf(": ACPI %s Button\n", desc); 122 123 sc->sc_node = aa->aa_node; 124 125 if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) { 126 printf("%s: unable to register with sysmon\n", 127 sc->sc_dev.dv_xname); 128 return; 129 } 130 131 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 132 ACPI_DEVICE_NOTIFY, acpibut_notify_handler, sc); 133 if (ACPI_FAILURE(rv)) { 134 printf("%s: unable to register DEVICE NOTIFY handler: %s\n", 135 sc->sc_dev.dv_xname, AcpiFormatException(rv)); 136 return; 137 } 138 139 #ifdef ACPI_BUT_DEBUG 140 /* Display the current state when it changes. */ 141 sc->sc_flags = ACPIBUT_F_VERBOSE; 142 #endif 143 } 144 145 /* 146 * acpibut_pressed_event: 147 * 148 * Deal with a button being pressed. 149 */ 150 void 151 acpibut_pressed_event(void *arg) 152 { 153 struct acpibut_softc *sc = arg; 154 155 if (sc->sc_flags & ACPIBUT_F_VERBOSE) 156 printf("%s: button pressed\n", sc->sc_dev.dv_xname); 157 158 sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED); 159 } 160 161 /* 162 * acpibut_notify_handler: 163 * 164 * Callback from ACPI interrupt handler to notify us of an event. 165 */ 166 void 167 acpibut_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context) 168 { 169 struct acpibut_softc *sc = context; 170 int rv; 171 172 switch (notify) { 173 case ACPI_NOTIFY_S0PowerButtonPressed: 174 #if 0 175 case ACPI_NOTIFY_S0SleepButtonPressed: /* same as above */ 176 #endif 177 #ifdef ACPI_BUT_DEBUG 178 printf("%s: received ButtonPressed message\n", 179 sc->sc_dev.dv_xname); 180 #endif 181 rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO, 182 acpibut_pressed_event, sc); 183 if (ACPI_FAILURE(rv)) 184 printf("%s: WARNING: unable to queue button pressed " 185 "callback: %s\n", sc->sc_dev.dv_xname, 186 AcpiFormatException(rv)); 187 break; 188 189 /* XXX ACPI_NOTIFY_DeviceWake?? */ 190 191 default: 192 printf("%s: received unknown notify message: 0x%x\n", 193 sc->sc_dev.dv_xname, notify); 194 } 195 } 196