1 /* $NetBSD: acpi_button.c,v 1.25 2007/12/09 20:27:52 jmcneill 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 1.25 2007/12/09 20:27:52 jmcneill 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 acpi_devnode *sc_node; /* our ACPI devnode */ 57 struct sysmon_pswitch sc_smpsw; /* our sysmon glue */ 58 int sc_flags; /* see below */ 59 }; 60 61 static const char * const power_button_hid[] = { 62 "PNP0C0C", 63 NULL 64 }; 65 66 static const char * const sleep_button_hid[] = { 67 "PNP0C0E", 68 NULL 69 }; 70 71 #define ACPIBUT_F_VERBOSE 0x01 /* verbose events */ 72 73 static int acpibut_match(device_t, struct cfdata *, void *); 74 static void acpibut_attach(device_t, device_t, void *); 75 76 CFATTACH_DECL_NEW(acpibut, sizeof(struct acpibut_softc), 77 acpibut_match, acpibut_attach, NULL, NULL); 78 79 static void acpibut_pressed_event(void *); 80 static void acpibut_notify_handler(ACPI_HANDLE, UINT32, void *); 81 82 /* 83 * acpibut_match: 84 * 85 * Autoconfiguration `match' routine. 86 */ 87 static int 88 acpibut_match(device_t parent, struct cfdata *match, void *aux) 89 { 90 struct acpi_attach_args *aa = aux; 91 92 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 93 return 0; 94 95 if (acpi_match_hid(aa->aa_node->ad_devinfo, power_button_hid)) 96 return 1; 97 98 if (acpi_match_hid(aa->aa_node->ad_devinfo, sleep_button_hid)) 99 return 1; 100 101 return 0; 102 } 103 104 /* 105 * acpibut_attach: 106 * 107 * Autoconfiguration `attach' routine. 108 */ 109 static void 110 acpibut_attach(device_t parent, device_t self, void *aux) 111 { 112 struct acpibut_softc *sc = device_private(self); 113 struct acpi_attach_args *aa = aux; 114 const char *desc; 115 ACPI_STATUS rv; 116 117 sc->sc_smpsw.smpsw_name = device_xname(self); 118 119 if (acpi_match_hid(aa->aa_node->ad_devinfo, power_button_hid)) { 120 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_POWER; 121 desc = "Power"; 122 } else if (acpi_match_hid(aa->aa_node->ad_devinfo, sleep_button_hid)) { 123 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_SLEEP; 124 desc = "Sleep"; 125 } else { 126 panic("acpibut_attach: impossible"); 127 } 128 129 aprint_naive(": ACPI %s Button\n", desc); 130 aprint_normal(": ACPI %s Button\n", desc); 131 132 sc->sc_node = aa->aa_node; 133 134 if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) { 135 aprint_error_dev(self, "unable to register with sysmon\n"); 136 return; 137 } 138 139 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 140 ACPI_DEVICE_NOTIFY, acpibut_notify_handler, self); 141 if (ACPI_FAILURE(rv)) { 142 aprint_error_dev(self, 143 "unable to register DEVICE NOTIFY handler: %s\n", 144 AcpiFormatException(rv)); 145 return; 146 } 147 148 acpi_set_wake_gpe(sc->sc_node->ad_handle); 149 150 #ifdef ACPI_BUT_DEBUG 151 /* Display the current state when it changes. */ 152 sc->sc_flags = ACPIBUT_F_VERBOSE; 153 #endif 154 155 if (!pmf_device_register(self, NULL, NULL)) 156 aprint_error_dev(self, "couldn't establish power handler\n"); 157 } 158 159 /* 160 * acpibut_pressed_event: 161 * 162 * Deal with a button being pressed. 163 */ 164 static void 165 acpibut_pressed_event(void *arg) 166 { 167 device_t dv = arg; 168 struct acpibut_softc *sc = device_private(dv); 169 170 if (sc->sc_flags & ACPIBUT_F_VERBOSE) 171 aprint_verbose_dev(dv, "button pressed\n"); 172 173 sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED); 174 } 175 176 /* 177 * acpibut_notify_handler: 178 * 179 * Callback from ACPI interrupt handler to notify us of an event. 180 */ 181 static void 182 acpibut_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context) 183 { 184 device_t dv = context; 185 int rv; 186 187 switch (notify) { 188 case ACPI_NOTIFY_S0PowerButtonPressed: 189 #if 0 190 case ACPI_NOTIFY_S0SleepButtonPressed: /* same as above */ 191 #endif 192 #ifdef ACPI_BUT_DEBUG 193 aprint_debug_dev(dv, "received ButtonPressed message\n"); 194 #endif 195 rv = AcpiOsExecute(OSL_NOTIFY_HANDLER, 196 acpibut_pressed_event, dv); 197 if (ACPI_FAILURE(rv)) 198 aprint_error_dev(dv, 199 "WARNING: unable to queue button pressed callback: %s\n", 200 AcpiFormatException(rv)); 201 break; 202 203 /* XXX ACPI_NOTIFY_DeviceWake?? */ 204 205 default: 206 aprint_error_dev(dv, "received unknown notify message: 0x%x\n", 207 notify); 208 } 209 } 210