sys/dev/acpica5/acpi_acad.c

   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: src/sys/dev/acpica/acpi_acad.c,v 1.27 2004/06/13 22:52:30 njl Exp $
  27  * $DragonFly: src/sys/dev/acpica5/acpi_acad.c,v 1.8 2007/10/23 03:04:48 y0netan1 Exp $
  28  */
  29
  30 #include "opt_acpi.h"
  31 #include <sys/param.h>
  32 #include <sys/kernel.h>
  33 #include <sys/bus.h>
  34 #include <sys/rman.h>
  35 #include <sys/ioccom.h>
  36 #include <sys/malloc.h>
  37 #include <sys/module.h>
  38 #include <sys/conf.h>
  39 #include <sys/power.h>
  40
  41 #include "acpi.h"
  42 #include <dev/acpica5/acpivar.h>
  43 #include <dev/acpica5/acpiio.h>
  44
  45 /* Hooks for the ACPI CA debugging infrastructure */
  46 #define _COMPONENT      ACPI_AC_ADAPTER
  47 ACPI_MODULE_NAME("AC_ADAPTER")
  48
  49 /* Number of times to retry initialization before giving up. */
  50 #define ACPI_ACAD_RETRY_MAX             6
  51
  52 #define ACPI_DEVICE_CHECK_PNP           0x00
  53 #define ACPI_DEVICE_CHECK_EXISTENCE     0x01
  54 #define ACPI_POWERSOURCE_STAT_CHANGE    0x80
  55
  56 struct  acpi_acad_softc {
  57     int status;
  58     int initializing;
  59 };
  60
  61 static void     acpi_acad_get_status(void *);
  62 static void     acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
  63 static int      acpi_acad_probe(device_t);
  64 static int      acpi_acad_attach(device_t);
  65 static int      acpi_acad_ioctl(u_long, caddr_t, void *);
  66 static int      acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
  67 static void     acpi_acad_init_acline(void *arg);
  68
  69 static device_method_t acpi_acad_methods[] = {
  70     /* Device interface */
  71     DEVMETHOD(device_probe,     acpi_acad_probe),
  72     DEVMETHOD(device_attach,    acpi_acad_attach),
  73
  74     {0, 0}
  75 };
  76
  77 static driver_t acpi_acad_driver = {
  78     "acpi_acad",
  79     acpi_acad_methods,
  80     sizeof(struct acpi_acad_softc),
  81 };
  82
  83 static devclass_t acpi_acad_devclass;
  84 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0);
  85 MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
  86
  87 static void
  88 acpi_acad_get_status(void *context)
  89 {
  90     struct acpi_acad_softc *sc;
  91     device_t    dev;
  92     ACPI_HANDLE h;
  93     int         newstatus;
  94
  95     dev = context;
  96     sc = device_get_softc(dev);
  97     h = acpi_get_handle(dev);
  98     if (ACPI_FAILURE(acpi_GetInteger(h, "_PSR", &newstatus))) {
  99         sc->status = -1;
 100         return;
 101     }
 102
 103     if (sc->status != newstatus) {
 104         sc->status = newstatus;
 105
 106         /* Set system power profile based on AC adapter status */
 107         power_profile_set_state(sc->status ? POWER_PROFILE_PERFORMANCE :
 108                                 POWER_PROFILE_ECONOMY);
 109         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 110                     "%s Line\n", sc->status ? "On" : "Off");
 111
 112         acpi_UserNotify("ACAD", h, sc->status);
 113     }
 114 }
 115
 116 static void
 117 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
 118 {
 119     device_t dev;
 120
 121     dev = (device_t)context;
 122     switch (notify) {
 123     case ACPI_DEVICE_CHECK_PNP:
 124     case ACPI_DEVICE_CHECK_EXISTENCE:
 125     case ACPI_POWERSOURCE_STAT_CHANGE:
 126         /* Temporarily.  It is better to notify policy manager */
 127         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context);
 128         break;
 129     default:
 130         device_printf(dev, "unknown notify %#x\n", notify);
 131         break;
 132     }
 133 }
 134
 135 static int
 136 acpi_acad_probe(device_t dev)
 137 {
 138     if (acpi_get_type(dev) == ACPI_TYPE_DEVICE && !acpi_disabled("acad") &&
 139         acpi_MatchHid(acpi_get_handle(dev), "ACPI0003")) {
 140         device_set_desc(dev, "AC Adapter");
 141         return (0);
 142     }
 143     return (ENXIO);
 144 }
 145
 146 static int
 147 acpi_acad_attach(device_t dev)
 148 {
 149     struct acpi_acad_softc *sc;
 150     struct acpi_softc      *acpi_sc;
 151     ACPI_HANDLE handle;
 152     int         error;
 153
 154     sc = device_get_softc(dev);
 155     if (sc == NULL)
 156         return (ENXIO);
 157     handle = acpi_get_handle(dev);
 158
 159     error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
 160     if (error != 0)
 161         return (error);
 162
 163     if (device_get_unit(dev) == 0) {
 164         acpi_sc = acpi_device_get_parent_softc(dev);
 165         SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
 166                         SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
 167                         OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
 168                         &sc->status, 0, acpi_acad_sysctl, "I", "");
 169     }
 170
 171     /* Get initial status after whole system is up. */
 172     sc->status = -1;
 173     sc->initializing = 0;
 174
 175     /*
 176      * Also install a system notify handler even though this is not
 177      * required by the specification.  The Casio FIVA needs this.
 178      */
 179     AcpiInstallNotifyHandler(handle, ACPI_SYSTEM_NOTIFY,
 180                              acpi_acad_notify_handler, dev);
 181     AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY,
 182                              acpi_acad_notify_handler, dev);
 183     AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev);
 184
 185     return (0);
 186 }
 187
 188 static int
 189 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
 190 {
 191     struct acpi_acad_softc *sc;
 192     device_t dev;
 193
 194     dev = (device_t)arg;
 195     sc = device_get_softc(dev);
 196     if (sc == NULL)
 197         return (ENXIO);
 198
 199     /*
 200      * No security check required: information retrieval only.  If
 201      * new functions are added here, a check might be required.
 202      */
 203     switch (cmd) {
 204     case ACPIIO_ACAD_GET_STATUS:
 205         acpi_acad_get_status(dev);
 206         *(int *)addr = sc->status;
 207         break;
 208     default:
 209         break;
 210     }
 211
 212     return (0);
 213 }
 214
 215 static int
 216 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
 217 {
 218     int val, error;
 219
 220     if (acpi_acad_get_acline(&val) != 0)
 221         return (ENXIO);
 222
 223     val = *(u_int *)oidp->oid_arg1;
 224     error = sysctl_handle_int(oidp, &val, 0, req);
 225     return (error);
 226 }
 227
 228 static void
 229 acpi_acad_init_acline(void *arg)
 230 {
 231     struct acpi_acad_softc *sc;
 232     device_t    dev;
 233     int         retry, status;
 234
 235     dev = (device_t)arg;
 236     sc = device_get_softc(dev);
 237     if (sc->initializing)
 238         return;
 239
 240     sc->initializing = 1;
 241     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 242                 "acline initialization start\n");
 243
 244     status = 0;
 245     for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
 246         acpi_acad_get_status(dev);
 247         if (status != sc->status)
 248             break;
 249         AcpiOsSleep(10);
 250     }
 251
 252     sc->initializing = 0;
 253     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 254                 "acline initialization done, tried %d times\n", retry + 1);
 255 }
 256
 257 /*
 258  * Public interfaces.
 259  */
 260 int
 261 acpi_acad_get_acline(int *status)
 262 {
 263     struct acpi_acad_softc *sc;
 264     device_t dev;
 265
 266     dev = devclass_get_device(acpi_acad_devclass, 0);
 267     if (dev == NULL)
 268         return (ENXIO);
 269     sc = device_get_softc(dev);
 270     if (sc == NULL)
 271         return (ENXIO);
 272
 273     acpi_acad_get_status(dev);
 274     *status = sc->status;
 275
 276     return (0);
 277 }