acpi_button.c revision 1.34
1/* $NetBSD: acpi_button.c,v 1.34 2010/03/05 14:00:16 jruoho 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 1.34 2010/03/05 14:00:16 jruoho Exp $"); 44 45#include <sys/param.h> 46#include <sys/device.h> 47#include <sys/module.h> 48#include <sys/systm.h> 49 50#include <dev/acpi/acpireg.h> 51#include <dev/acpi/acpivar.h> 52 53#define _COMPONENT ACPI_BUTTON_COMPONENT 54ACPI_MODULE_NAME ("acpi_button") 55 56struct acpibut_softc { 57 struct acpi_devnode *sc_node; 58 struct sysmon_pswitch sc_smpsw; 59}; 60 61static const char * const power_button_hid[] = { 62 "PNP0C0C", 63 NULL 64}; 65 66static const char * const sleep_button_hid[] = { 67 "PNP0C0E", 68 NULL 69}; 70 71static int acpibut_match(device_t, cfdata_t, void *); 72static void acpibut_attach(device_t, device_t, void *); 73static int acpibut_detach(device_t, int); 74static void acpibut_pressed_event(void *); 75static void acpibut_notify_handler(ACPI_HANDLE, uint32_t, void *); 76 77CFATTACH_DECL_NEW(acpibut, sizeof(struct acpibut_softc), 78 acpibut_match, acpibut_attach, acpibut_detach, NULL); 79 80/* 81 * acpibut_match: 82 * 83 * Autoconfiguration `match' routine. 84 */ 85static int 86acpibut_match(device_t parent, cfdata_t match, void *aux) 87{ 88 struct acpi_attach_args *aa = aux; 89 90 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 91 return 0; 92 93 if (acpi_match_hid(aa->aa_node->ad_devinfo, power_button_hid)) 94 return 1; 95 96 if (acpi_match_hid(aa->aa_node->ad_devinfo, sleep_button_hid)) 97 return 1; 98 99 return 0; 100} 101 102/* 103 * acpibut_attach: 104 * 105 * Autoconfiguration `attach' routine. 106 */ 107static void 108acpibut_attach(device_t parent, device_t self, void *aux) 109{ 110 struct acpibut_softc *sc = device_private(self); 111 struct acpi_attach_args *aa = aux; 112 const char *desc; 113 ACPI_STATUS rv; 114 115 sc->sc_smpsw.smpsw_name = device_xname(self); 116 117 if (acpi_match_hid(aa->aa_node->ad_devinfo, power_button_hid)) { 118 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_POWER; 119 desc = "Power"; 120 } else if (acpi_match_hid(aa->aa_node->ad_devinfo, sleep_button_hid)) { 121 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_SLEEP; 122 desc = "Sleep"; 123 } else 124 panic("%s: impossible", __func__); 125 126 aprint_naive(": ACPI %s Button\n", desc); 127 aprint_normal(": ACPI %s Button\n", desc); 128 129 sc->sc_node = aa->aa_node; 130 131 (void)pmf_device_register(self, NULL, NULL); 132 (void)sysmon_pswitch_register(&sc->sc_smpsw); 133 134 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 135 ACPI_DEVICE_NOTIFY, acpibut_notify_handler, self); 136 137 if (ACPI_FAILURE(rv)) 138 aprint_error_dev(self, "failed to install notify handler\n"); 139} 140 141/* 142 * acpibut_detach: 143 * 144 * Autoconfiguration `detach' routine. 145 */ 146static int 147acpibut_detach(device_t self, int flags) 148{ 149 struct acpibut_softc *sc = device_private(self); 150 ACPI_STATUS rv; 151 152 rv = AcpiRemoveNotifyHandler(sc->sc_node->ad_handle, 153 ACPI_DEVICE_NOTIFY, acpibut_notify_handler); 154 155 if (ACPI_FAILURE(rv)) 156 return EBUSY; 157 158 pmf_device_deregister(self); 159 sysmon_pswitch_unregister(&sc->sc_smpsw); 160 161 return 0; 162} 163 164/* 165 * acpibut_pressed_event: 166 * 167 * Deal with a button being pressed. 168 */ 169static void 170acpibut_pressed_event(void *arg) 171{ 172 device_t dv = arg; 173 struct acpibut_softc *sc = device_private(dv); 174 175 aprint_debug_dev(dv, "button pressed\n"); 176 sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED); 177} 178 179/* 180 * acpibut_notify_handler: 181 * 182 * Callback from ACPI interrupt handler to notify us of an event. 183 */ 184static void 185acpibut_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context) 186{ 187 static const int handler = OSL_NOTIFY_HANDLER; 188 device_t dv = context; 189 190 switch (notify) { 191 192 /* case ACPI_NOTIFY_S0SleepButtonPressed: */ 193 case ACPI_NOTIFY_S0PowerButtonPressed: 194 (void)AcpiOsExecute(handler, acpibut_pressed_event, dv); 195 break; 196 197 default: 198 aprint_error_dev(dv, "unknown notify 0x%02X\n", notify); 199 } 200} 201 202#ifdef _MODULE 203 204MODULE(MODULE_CLASS_DRIVER, acpibut, NULL); 205CFDRIVER_DECL(acpibut, DV_DULL, NULL); 206 207static int acpibutloc[] = { -1 }; 208extern struct cfattach acpibut_ca; 209 210static struct cfparent acpiparent = { 211 "acpinodebus", NULL, DVUNIT_ANY 212}; 213 214static struct cfdata acpibut_cfdata[] = { 215 { 216 .cf_name = "acpibut", 217 .cf_atname = "acpibut", 218 .cf_unit = 0, 219 .cf_fstate = FSTATE_STAR, 220 .cf_loc = acpibutloc, 221 .cf_flags = 0, 222 .cf_pspec = &acpiparent, 223 }, 224 225 { NULL } 226}; 227 228static int 229acpibut_modcmd(modcmd_t cmd, void *context) 230{ 231 int err; 232 233 switch (cmd) { 234 235 case MODULE_CMD_INIT: 236 237 err = config_cfdriver_attach(&acpibut_cd); 238 239 if (err != 0) 240 return err; 241 242 err = config_cfattach_attach("acpibut", &acpibut_ca); 243 244 if (err != 0) { 245 config_cfdriver_detach(&acpibut_cd); 246 return err; 247 } 248 249 err = config_cfdata_attach(acpibut_cfdata, 1); 250 251 if (err != 0) { 252 config_cfattach_detach("acpibut", &acpibut_ca); 253 config_cfdriver_detach(&acpibut_cd); 254 return err; 255 } 256 257 return 0; 258 259 case MODULE_CMD_FINI: 260 261 err = config_cfdata_detach(acpibut_cfdata); 262 263 if (err != 0) 264 return err; 265 266 config_cfattach_detach("acpibut", &acpibut_ca); 267 config_cfdriver_detach(&acpibut_cd); 268 269 return 0; 270 271 default: 272 return ENOTTY; 273 } 274} 275 276#endif /* _MODULE */ 277