1 /* $NetBSD: acpi_acad.c,v 1.39 2010/01/31 11:16:18 jruoho Exp $ */ 2 3 /* 4 * Copyright 2001 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 AC Adapter driver. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: acpi_acad.c,v 1.39 2010/01/31 11:16:18 jruoho Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/device.h> 48 #include <sys/mutex.h> 49 50 #include <dev/acpi/acpica.h> 51 #include <dev/acpi/acpireg.h> 52 #include <dev/acpi/acpivar.h> 53 54 #include <dev/sysmon/sysmonvar.h> 55 56 #define _COMPONENT ACPI_ACAD_COMPONENT 57 ACPI_MODULE_NAME ("acpi_acad") 58 59 struct acpiacad_softc { 60 struct acpi_devnode *sc_node; 61 struct sysmon_envsys *sc_sme; 62 struct sysmon_pswitch sc_smpsw; 63 envsys_data_t sc_sensor; 64 kmutex_t sc_mutex; 65 int sc_status; 66 }; 67 68 static const char * const acad_hid[] = { 69 "ACPI0003", 70 NULL 71 }; 72 73 static int acpiacad_match(device_t, cfdata_t, void *); 74 static void acpiacad_attach(device_t, device_t, void *); 75 static int acpiacad_detach(device_t, int); 76 static bool acpiacad_resume(device_t, pmf_qual_t); 77 static void acpiacad_get_status(void *); 78 static void acpiacad_notify_handler(ACPI_HANDLE, uint32_t, void *); 79 static void acpiacad_init_envsys(device_t); 80 81 CFATTACH_DECL_NEW(acpiacad, sizeof(struct acpiacad_softc), 82 acpiacad_match, acpiacad_attach, acpiacad_detach, NULL); 83 84 /* 85 * acpiacad_match: 86 * 87 * Autoconfiguration `match' routine. 88 */ 89 static int 90 acpiacad_match(device_t parent, cfdata_t match, void *aux) 91 { 92 struct acpi_attach_args *aa = aux; 93 94 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 95 return 0; 96 97 return acpi_match_hid(aa->aa_node->ad_devinfo, acad_hid); 98 } 99 100 /* 101 * acpiacad_attach: 102 * 103 * Autoconfiguration `attach' routine. 104 */ 105 static void 106 acpiacad_attach(device_t parent, device_t self, void *aux) 107 { 108 struct acpiacad_softc *sc = device_private(self); 109 struct acpi_attach_args *aa = aux; 110 ACPI_STATUS rv; 111 112 aprint_naive(": ACPI AC Adapter\n"); 113 aprint_normal(": ACPI AC Adapter\n"); 114 115 sc->sc_sme = NULL; 116 sc->sc_status = -1; 117 sc->sc_node = aa->aa_node; 118 119 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_NONE); 120 121 sc->sc_smpsw.smpsw_name = device_xname(self); 122 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_ACADAPTER; 123 124 (void)sysmon_pswitch_register(&sc->sc_smpsw); 125 (void)pmf_device_register(self, NULL, acpiacad_resume); 126 127 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 128 ACPI_ALL_NOTIFY, acpiacad_notify_handler, self); 129 130 if (ACPI_SUCCESS(rv)) 131 acpiacad_init_envsys(self); 132 } 133 134 /* 135 * acpiacad_detach: 136 * 137 * Autoconfiguration `detach' routine. 138 */ 139 static int 140 acpiacad_detach(device_t self, int flags) 141 { 142 struct acpiacad_softc *sc = device_private(self); 143 ACPI_STATUS rv; 144 145 rv = AcpiRemoveNotifyHandler(sc->sc_node->ad_handle, 146 ACPI_ALL_NOTIFY, acpiacad_notify_handler); 147 148 if (ACPI_FAILURE(rv)) 149 return EBUSY; 150 151 mutex_destroy(&sc->sc_mutex); 152 153 if (sc->sc_sme != NULL) 154 sysmon_envsys_unregister(sc->sc_sme); 155 156 pmf_device_deregister(self); 157 sysmon_pswitch_unregister(&sc->sc_smpsw); 158 159 return 0; 160 } 161 162 /* 163 * acpiacad_resume: 164 * 165 * Queue a new status check. 166 */ 167 static bool 168 acpiacad_resume(device_t dv, pmf_qual_t qual) 169 { 170 171 (void)AcpiOsExecute(OSL_NOTIFY_HANDLER, acpiacad_get_status, dv); 172 173 return true; 174 } 175 176 /* 177 * acpiacad_get_status: 178 * 179 * Get, and possibly display, the current AC line status. 180 */ 181 static void 182 acpiacad_get_status(void *arg) 183 { 184 device_t dv = arg; 185 struct acpiacad_softc *sc = device_private(dv); 186 ACPI_INTEGER status; 187 ACPI_STATUS rv; 188 189 mutex_enter(&sc->sc_mutex); 190 191 rv = acpi_eval_integer(sc->sc_node->ad_handle, "_PSR", &status); 192 193 if (ACPI_FAILURE(rv)) 194 goto fail; 195 196 if (status != 0 && status != 1) { 197 rv = AE_BAD_VALUE; 198 goto fail; 199 } 200 201 if (sc->sc_status != status) { 202 203 /* 204 * If status has changed, send the event: 205 * 206 * PSWITCH_EVENT_PRESSED : _PSR = 1 : AC online. 207 * PSWITCH_EVENT_RELEASED : _PSR = 0 : AC offline. 208 */ 209 sysmon_pswitch_event(&sc->sc_smpsw, (status != 0) ? 210 PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED); 211 212 aprint_debug_dev(dv, "AC adapter %sconnected\n", 213 status == 0 ? "not " : ""); 214 } 215 216 sc->sc_status = status; 217 sc->sc_sensor.state = ENVSYS_SVALID; 218 sc->sc_sensor.value_cur = sc->sc_status; 219 220 mutex_exit(&sc->sc_mutex); 221 222 return; 223 224 fail: 225 sc->sc_status = -1; 226 sc->sc_sensor.state = ENVSYS_SINVALID; 227 228 aprint_debug_dev(dv, "failed to evaluate _PSR: %s\n", 229 AcpiFormatException(rv)); 230 231 mutex_exit(&sc->sc_mutex); 232 } 233 234 /* 235 * acpiacad_notify_handler: 236 * 237 * Callback from ACPI interrupt handler to notify us of an event. 238 */ 239 static void 240 acpiacad_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context) 241 { 242 static const int handler = OSL_NOTIFY_HANDLER; 243 device_t dv = context; 244 245 switch (notify) { 246 /* 247 * XXX So, BusCheck is not exactly what I would expect, 248 * but at least my IBM T21 sends it on AC adapter status 249 * change. --thorpej@wasabisystems.com 250 */ 251 /* 252 * XXX My Acer TravelMate 291 sends DeviceCheck on AC 253 * adapter status change. 254 * --rpaulo@NetBSD.org 255 */ 256 /* 257 * XXX Sony VAIO VGN-N250E sends BatteryInformationChanged on AC 258 * adapter status change. 259 * --jmcneill@NetBSD.org 260 */ 261 case ACPI_NOTIFY_BusCheck: 262 case ACPI_NOTIFY_DeviceCheck: 263 case ACPI_NOTIFY_PowerSourceStatusChanged: 264 case ACPI_NOTIFY_BatteryInformationChanged: 265 (void)AcpiOsExecute(handler, acpiacad_get_status, dv); 266 break; 267 268 default: 269 aprint_error_dev(dv, "unknown notify 0x%02X\n", notify); 270 } 271 } 272 273 static void 274 acpiacad_init_envsys(device_t dv) 275 { 276 struct acpiacad_softc *sc = device_private(dv); 277 278 sc->sc_sme = sysmon_envsys_create(); 279 280 sc->sc_sensor.state = ENVSYS_SINVALID; 281 sc->sc_sensor.units = ENVSYS_INDICATOR; 282 283 (void)strlcpy(sc->sc_sensor.desc, "connected", ENVSYS_DESCLEN); 284 285 if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor) != 0) 286 goto fail; 287 288 sc->sc_sme->sme_name = device_xname(dv); 289 sc->sc_sme->sme_class = SME_CLASS_ACADAPTER; 290 sc->sc_sme->sme_flags = SME_DISABLE_REFRESH; 291 292 if (sysmon_envsys_register(sc->sc_sme) != 0) 293 goto fail; 294 295 (void)AcpiOsExecute(OSL_NOTIFY_HANDLER, acpiacad_get_status, dv); 296 297 return; 298 299 fail: 300 aprint_error_dev(dv, "failed to initialize sysmon\n"); 301 sysmon_envsys_destroy(sc->sc_sme); 302 sc->sc_sme = NULL; 303 } 304