acpi_acad.c revision 128468
1/*- 2 * Copyright (c) 2000 Takanori Watanabe 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/dev/acpica/acpi_acad.c 128468 2004-04-20 13:09:17Z njl $ 27 */ 28 29#include "opt_acpi.h" 30#include <sys/param.h> 31#include <sys/kernel.h> 32#include <sys/bus.h> 33 34#include <machine/bus.h> 35#include <machine/resource.h> 36#include <sys/rman.h> 37#include <sys/ioccom.h> 38#include <sys/malloc.h> 39#include <sys/conf.h> 40#include <sys/power.h> 41 42#include "acpi.h" 43#include <dev/acpica/acpivar.h> 44#include <dev/acpica/acpiio.h> 45 46/* Hooks for the ACPI CA debugging infrastructure */ 47#define _COMPONENT ACPI_AC_ADAPTER 48ACPI_MODULE_NAME("AC_ADAPTER") 49 50/* Number of times to retry initialization before giving up. */ 51#define ACPI_ACAD_RETRY_MAX 6 52 53#define ACPI_DEVICE_CHECK_PNP 0x00 54#define ACPI_DEVICE_CHECK_EXISTENCE 0x01 55#define ACPI_POWERSOURCE_STAT_CHANGE 0x80 56 57struct acpi_acad_softc { 58 int status; 59 int initializing; 60}; 61 62static void acpi_acad_get_status(void *); 63static void acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *); 64static int acpi_acad_probe(device_t); 65static int acpi_acad_attach(device_t); 66static int acpi_acad_ioctl(u_long, caddr_t, void *); 67static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS); 68static void acpi_acad_init_acline(void *arg); 69 70static device_method_t acpi_acad_methods[] = { 71 /* Device interface */ 72 DEVMETHOD(device_probe, acpi_acad_probe), 73 DEVMETHOD(device_attach, acpi_acad_attach), 74 75 {0, 0} 76}; 77 78static driver_t acpi_acad_driver = { 79 "acpi_acad", 80 acpi_acad_methods, 81 sizeof(struct acpi_acad_softc), 82}; 83 84static devclass_t acpi_acad_devclass; 85DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0); 86MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1); 87 88static void 89acpi_acad_get_status(void *context) 90{ 91 struct acpi_acad_softc *sc; 92 device_t dev; 93 ACPI_HANDLE h; 94 int newstatus; 95 96 dev = context; 97 sc = device_get_softc(dev); 98 h = acpi_get_handle(dev); 99 if (ACPI_FAILURE(acpi_GetInteger(h, "_PSR", &newstatus))) { 100 sc->status = -1; 101 return; 102 } 103 104 if (sc->status != newstatus) { 105 sc->status = newstatus; 106 107 /* Set system power profile based on AC adapter status */ 108 power_profile_set_state(sc->status ? POWER_PROFILE_PERFORMANCE : 109 POWER_PROFILE_ECONOMY); 110 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 111 "%s Line\n", sc->status ? "On" : "Off"); 112 113 acpi_UserNotify("ACAD", h, sc->status); 114 } 115} 116 117static void 118acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 119{ 120 device_t dev = context; 121 122 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 123 "Notify 0x%x\n", notify); 124 125 switch (notify) { 126 case ACPI_DEVICE_CHECK_PNP: 127 case ACPI_DEVICE_CHECK_EXISTENCE: 128 case ACPI_POWERSOURCE_STAT_CHANGE: 129 /* Temporarily. It is better to notify policy manager */ 130 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_get_status, context); 131 break; 132 default: 133 break; 134 } 135} 136 137static int 138acpi_acad_probe(device_t dev) 139{ 140 if (acpi_get_type(dev) == ACPI_TYPE_DEVICE && !acpi_disabled("acad") && 141 acpi_MatchHid(dev, "ACPI0003")) { 142 device_set_desc(dev, "AC Adapter"); 143 return (0); 144 } 145 return (ENXIO); 146} 147 148static int 149acpi_acad_attach(device_t dev) 150{ 151 struct acpi_acad_softc *sc; 152 struct acpi_softc *acpi_sc; 153 ACPI_HANDLE handle; 154 int error; 155 156 sc = device_get_softc(dev); 157 if (sc == NULL) 158 return (ENXIO); 159 handle = acpi_get_handle(dev); 160 161 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev); 162 if (error != 0) 163 return (error); 164 165 if (device_get_unit(dev) == 0) { 166 acpi_sc = acpi_device_get_parent_softc(dev); 167 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx, 168 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), 169 OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD, 170 &sc->status, 0, acpi_acad_sysctl, "I", ""); 171 } 172 173 /* Get initial status after whole system is up. */ 174 sc->status = -1; 175 sc->initializing = 0; 176 177 /* 178 * Also install a system notify handler even though this is not 179 * required by the specification. The Casio FIVA needs this. 180 */ 181 AcpiInstallNotifyHandler(handle, ACPI_SYSTEM_NOTIFY, 182 acpi_acad_notify_handler, dev); 183 AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY, 184 acpi_acad_notify_handler, dev); 185 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_init_acline, dev); 186 187 return (0); 188} 189 190static int 191acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg) 192{ 193 struct acpi_acad_softc *sc; 194 device_t dev; 195 196 dev = (device_t)arg; 197 sc = device_get_softc(dev); 198 if (sc == NULL) 199 return (ENXIO); 200 201 /* 202 * No security check required: information retrieval only. If 203 * new functions are added here, a check might be required. 204 */ 205 switch (cmd) { 206 case ACPIIO_ACAD_GET_STATUS: 207 acpi_acad_get_status(dev); 208 *(int *)addr = sc->status; 209 break; 210 default: 211 break; 212 } 213 214 return (0); 215} 216 217static int 218acpi_acad_sysctl(SYSCTL_HANDLER_ARGS) 219{ 220 int val, error; 221 222 if (acpi_acad_get_acline(&val) != 0) 223 return (ENXIO); 224 225 val = *(u_int *)oidp->oid_arg1; 226 error = sysctl_handle_int(oidp, &val, 0, req); 227 return (error); 228} 229 230static void 231acpi_acad_init_acline(void *arg) 232{ 233 struct acpi_acad_softc *sc; 234 device_t dev; 235 int retry, status; 236 237 dev = (device_t)arg; 238 sc = device_get_softc(dev); 239 if (sc->initializing) 240 return; 241 242 sc->initializing = 1; 243 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 244 "acline initialization start\n"); 245 246 status = 0; 247 for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) { 248 acpi_acad_get_status(dev); 249 if (status != sc->status) 250 break; 251 AcpiOsSleep(10, 0); 252 } 253 254 sc->initializing = 0; 255 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 256 "acline initialization done, tried %d times\n", retry + 1); 257} 258 259/* 260 * Public interfaces. 261 */ 262int 263acpi_acad_get_acline(int *status) 264{ 265 struct acpi_acad_softc *sc; 266 device_t dev; 267 268 dev = devclass_get_device(acpi_acad_devclass, 0); 269 if (dev == NULL) 270 return (ENXIO); 271 sc = device_get_softc(dev); 272 if (sc == NULL) 273 return (ENXIO); 274 275 acpi_acad_get_status(dev); 276 *status = sc->status; 277 278 return (0); 279} 280