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  * $FreeBSD: src/sys/dev/acpica/acpi_acad.c,v 1.39 2009/06/05 18:44:36 jkim Exp
  26  */
  27
  28 #include <sys/cdefs.h>
  29
  30 #include "opt_acpi.h"
  31 #include <sys/param.h>
  32 #include <sys/kernel.h>
  33 #include <sys/bus.h>
  34
  35 #include <sys/rman.h>
  36 #include <sys/ioccom.h>
  37 #include <sys/malloc.h>
  38 #include <sys/module.h>
  39 #include <sys/conf.h>
  40 #include <sys/power.h>
  41
  42 #include "acpi.h"
  43
  44 #include <dev/acpica5/acpivar.h>
  45 #include <dev/acpica5/acpiio.h>
  46 #include <bus/isa/isavar.h>
  47 #include <bus/isa/pnpvar.h>
  48
  49 /* Hooks for the ACPI CA debugging infrastructure */
  50 #define _COMPONENT      ACPI_AC_ADAPTER
  51 ACPI_MODULE_NAME("AC_ADAPTER")
  52
  53 /* Number of times to retry initialization before giving up. */
  54 #define ACPI_ACAD_RETRY_MAX             6
  55
  56 #define ACPI_POWERSOURCE_STAT_CHANGE    0x80
  57
  58 struct  acpi_acad_softc {
  59     int status;
  60 };
  61
  62 static void     acpi_acad_get_status(void *);
  63 static void     acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
  64 static int      acpi_acad_probe(device_t);
  65 static int      acpi_acad_attach(device_t);
  66 static int      acpi_acad_ioctl(u_long, caddr_t, void *);
  67 static int      acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
  68 static void     acpi_acad_init_acline(void *arg);
  69 static void     acpi_acad_ac_only(void *arg);
  70
  71 static device_method_t acpi_acad_methods[] = {
  72     /* Device interface */
  73     DEVMETHOD(device_probe,     acpi_acad_probe),
  74     DEVMETHOD(device_attach,    acpi_acad_attach),
  75
  76     {0, 0}
  77 };
  78
  79 static driver_t acpi_acad_driver = {
  80     "acpi_acad",
  81     acpi_acad_methods,
  82     sizeof(struct acpi_acad_softc),
  83 };
  84
  85 static devclass_t acpi_acad_devclass;
  86 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0);
  87 MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
  88
  89 ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
  90
  91 SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL);
  92
  93 static void
  94 acpi_acad_get_status(void *context)
  95 {
  96     struct acpi_acad_softc *sc;
  97     device_t    dev;
  98     ACPI_HANDLE h;
  99     int         newstatus;
 100
 101     dev = context;
 102     sc = device_get_softc(dev);
 103     h = acpi_get_handle(dev);
 104     newstatus = -1;
 105     acpi_GetInteger(h, "_PSR", &newstatus);
 106
 107     /* If status is valid and has changed, notify the system. */
 108     ACPI_SERIAL_BEGIN(acad);
 109     if (newstatus != -1 && sc->status != newstatus) {
 110         sc->status = newstatus;
 111         power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
 112             POWER_PROFILE_ECONOMY);
 113         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 114             "%s Line\n", newstatus ? "On" : "Off");
 115         acpi_UserNotify("ACAD", h, newstatus);
 116     }
 117     ACPI_SERIAL_END(acad);
 118 }
 119
 120 static void
 121 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
 122 {
 123     device_t dev;
 124
 125     dev = (device_t)context;
 126     switch (notify) {
 127     case ACPI_NOTIFY_BUS_CHECK:
 128     case ACPI_NOTIFY_DEVICE_CHECK:
 129     case ACPI_POWERSOURCE_STAT_CHANGE:
 130         /* Temporarily.  It is better to notify policy manager */
 131         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context);
 132         break;
 133     default:
 134         device_printf(dev, "unknown notify %#x\n", notify);
 135         break;
 136     }
 137 }
 138
 139 static int
 140 acpi_acad_probe(device_t dev)
 141 {
 142     static char *acad_ids[] = { "ACPI0003", NULL };
 143
 144     if (acpi_disabled("acad") ||
 145         ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL)
 146         return (ENXIO);
 147
 148     device_set_desc(dev, "AC Adapter");
 149     return (0);
 150 }
 151
 152 static int
 153 acpi_acad_attach(device_t dev)
 154 {
 155     struct acpi_acad_softc *sc;
 156     struct acpi_softc      *acpi_sc;
 157     ACPI_HANDLE handle;
 158     int         error;
 159
 160     sc = device_get_softc(dev);
 161     handle = acpi_get_handle(dev);
 162
 163     error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
 164     if (error != 0)
 165         return (error);
 166
 167     if (device_get_unit(dev) == 0) {
 168         acpi_sc = acpi_device_get_parent_softc(dev);
 169         SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
 170                         SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
 171                         OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
 172                         &sc->status, 0, acpi_acad_sysctl, "I", "");
 173     }
 174
 175     /* Get initial status after whole system is up. */
 176     sc->status = -1;
 177
 178     /*
 179      * Install both system and device notify handlers since the Casio
 180      * FIVA needs them.
 181      */
 182     AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
 183                              acpi_acad_notify_handler, dev);
 184     AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev);
 185
 186     return (0);
 187 }
 188
 189 static int
 190 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
 191 {
 192     struct acpi_acad_softc *sc;
 193     device_t dev;
 194
 195     dev = (device_t)arg;
 196     sc = device_get_softc(dev);
 197
 198     /*
 199      * No security check required: information retrieval only.  If
 200      * new functions are added here, a check might be required.
 201      */
 202     switch (cmd) {
 203     case ACPIIO_ACAD_GET_STATUS:
 204         acpi_acad_get_status(dev);
 205         *(int *)addr = sc->status;
 206         break;
 207     default:
 208         break;
 209     }
 210
 211     return (0);
 212 }
 213
 214 static int
 215 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
 216 {
 217     int val, error;
 218
 219     if (acpi_acad_get_acline(&val) != 0)
 220         return (ENXIO);
 221
 222     val = *(u_int *)oidp->oid_arg1;
 223     error = sysctl_handle_int(oidp, &val, 0, req);
 224     return (error);
 225 }
 226
 227 static void
 228 acpi_acad_init_acline(void *arg)
 229 {
 230     struct acpi_acad_softc *sc;
 231     device_t    dev;
 232     int         retry;
 233
 234     dev = (device_t)arg;
 235     sc = device_get_softc(dev);
 236     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 237                 "acline initialization start\n");
 238
 239     for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
 240         acpi_acad_get_status(dev);
 241         if (sc->status != -1)
 242             break;
 243         AcpiOsSleep(10000);
 244     }
 245
 246     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 247                 "acline initialization done, tried %d times\n", retry + 1);
 248 }
 249
 250 /*
 251  * If no AC line devices detected after boot, create an "online" event
 252  * so that userland code can adjust power settings accordingly.  The default
 253  * power profile is "performance" so we don't need to repeat that here.
 254  */
 255 static void
 256 acpi_acad_ac_only(void __unused *arg)
 257 {
 258
 259     if (devclass_get_count(acpi_acad_devclass) == 0)
 260         acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1);
 261 }
 262
 263 /*
 264  * Public interfaces.
 265  */
 266 int
 267 acpi_acad_get_acline(int *status)
 268 {
 269     struct acpi_acad_softc *sc;
 270     device_t dev;
 271
 272     dev = devclass_get_device(acpi_acad_devclass, 0);
 273     if (dev == NULL)
 274         return (ENXIO);
 275     sc = device_get_softc(dev);
 276
 277     acpi_acad_get_status(dev);
 278     *status = sc->status;
 279
 280     return (0);
 281 }