sys/dev/acpica/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 1.39 2009/06/05 18:44:36 jkim Exp
  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 <sys/rman.h>
  35 #include <sys/malloc.h>
  36 #include <sys/module.h>
  37 #include <sys/conf.h>
  38 #include <sys/power.h>
  39
  40 #include "acpi.h"
  41
  42 #include <dev/acpica/acpivar.h>
  43 #include <dev/acpica/acpiio.h>
  44 #include <bus/isa/isavar.h>
  45 #include <bus/isa/pnpvar.h>
  46
  47 /* Hooks for the ACPICA debugging infrastructure */
  48 #define _COMPONENT      ACPI_AC_ADAPTER
  49 ACPI_MODULE_NAME("AC_ADAPTER")
  50
  51 /* Number of times to retry initialization before giving up. */
  52 #define ACPI_ACAD_RETRY_MAX             6
  53
  54 #define ACPI_POWERSOURCE_STAT_CHANGE    0x80
  55
  56 /*
  57  * _CST changed.
  58  * Also serves as notification code, when line is unplugged
  59  * on certain laptops.
  60  */
  61 #define ACPI_NOTIFY_CX_STATES           0x81
  62
  63 struct  acpi_acad_softc {
  64     int status;
  65 };
  66
  67 static void     acpi_acad_get_status(void *);
  68 static void     acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
  69 static int      acpi_acad_probe(device_t);
  70 static int      acpi_acad_attach(device_t);
  71 static int      acpi_acad_ioctl(u_long, caddr_t, void *);
  72 static int      acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
  73 static void     acpi_acad_init_acline(void *arg);
  74 static void     acpi_acad_ac_only(void *arg);
  75
  76 static device_method_t acpi_acad_methods[] = {
  77     /* Device interface */
  78     DEVMETHOD(device_probe,     acpi_acad_probe),
  79     DEVMETHOD(device_attach,    acpi_acad_attach),
  80
  81     DEVMETHOD_END
  82 };
  83
  84 static driver_t acpi_acad_driver = {
  85     "acpi_acad",
  86     acpi_acad_methods,
  87     sizeof(struct acpi_acad_softc),
  88     .gpri = KOBJ_GPRI_ACPI
  89 };
  90
  91 static devclass_t acpi_acad_devclass;
  92 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, NULL, NULL);
  93 MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
  94
  95 ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
  96
  97 SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL);
  98
  99 static void
 100 acpi_acad_get_status(void *context)
 101 {
 102     struct acpi_acad_softc *sc;
 103     device_t    dev;
 104     ACPI_HANDLE h;
 105     int         newstatus;
 106
 107     dev = context;
 108     sc = device_get_softc(dev);
 109     h = acpi_get_handle(dev);
 110     newstatus = -1;
 111     acpi_GetInteger(h, "_PSR", &newstatus);
 112
 113     /* If status is valid and has changed, notify the system. */
 114     ACPI_SERIAL_BEGIN(acad);
 115     if (newstatus != -1 && sc->status != newstatus) {
 116         sc->status = newstatus;
 117         ACPI_SERIAL_END(acad);
 118         power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
 119             POWER_PROFILE_ECONOMY);
 120         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 121             "%s Line\n", newstatus ? "On" : "Off");
 122         acpi_UserNotify("ACAD", h, newstatus);
 123     } else {
 124         ACPI_SERIAL_END(acad);
 125     }
 126 }
 127
 128 static void
 129 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
 130 {
 131     device_t dev;
 132
 133     dev = (device_t)context;
 134     switch (notify) {
 135     case ACPI_NOTIFY_BUS_CHECK:
 136     case ACPI_NOTIFY_DEVICE_CHECK:
 137     case ACPI_POWERSOURCE_STAT_CHANGE:
 138     case ACPI_NOTIFY_CX_STATES:
 139         /* Temporarily.  It is better to notify policy manager */
 140         AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context);
 141         break;
 142     default:
 143         device_printf(dev, "unknown notify: %#x\n", notify);
 144         break;
 145     }
 146 }
 147
 148 static int
 149 acpi_acad_probe(device_t dev)
 150 {
 151     static char *acad_ids[] = { "ACPI0003", NULL };
 152
 153     if (acpi_disabled("acad") ||
 154         ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL)
 155         return (ENXIO);
 156
 157     device_set_desc(dev, "AC Adapter");
 158     return (0);
 159 }
 160
 161 static int
 162 acpi_acad_attach(device_t dev)
 163 {
 164     struct acpi_acad_softc *sc;
 165     struct acpi_softc      *acpi_sc;
 166     ACPI_HANDLE handle;
 167     int         error;
 168
 169     sc = device_get_softc(dev);
 170     handle = acpi_get_handle(dev);
 171
 172     error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
 173     if (error != 0)
 174         return (error);
 175
 176     ACPI_SERIAL_INIT(acad);
 177
 178     if (device_get_unit(dev) == 0) {
 179         acpi_sc = acpi_device_get_parent_softc(dev);
 180         SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
 181                         SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
 182                         OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
 183                         &sc->status, 0, acpi_acad_sysctl, "I", "");
 184     }
 185
 186     /* Get initial status after whole system is up. */
 187     sc->status = -1;
 188
 189     /*
 190      * Install both system and device notify handlers since the Casio
 191      * FIVA needs them.
 192      */
 193     AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
 194                              acpi_acad_notify_handler, dev);
 195     AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev);
 196
 197     return (0);
 198 }
 199
 200 static int
 201 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
 202 {
 203     struct acpi_acad_softc *sc;
 204     device_t dev;
 205
 206     dev = (device_t)arg;
 207     sc = device_get_softc(dev);
 208
 209     /*
 210      * No security check required: information retrieval only.  If
 211      * new functions are added here, a check might be required.
 212      */
 213     switch (cmd) {
 214     case ACPIIO_ACAD_GET_STATUS:
 215         acpi_acad_get_status(dev);
 216         *(int *)addr = sc->status;
 217         break;
 218     default:
 219         break;
 220     }
 221
 222     return (0);
 223 }
 224
 225 static int
 226 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
 227 {
 228     int val, error;
 229
 230     if (acpi_acad_get_acline(&val) != 0)
 231         return (ENXIO);
 232
 233     val = *(u_int *)oidp->oid_arg1;
 234     error = sysctl_handle_int(oidp, &val, 0, req);
 235     return (error);
 236 }
 237
 238 static void
 239 acpi_acad_init_acline(void *arg)
 240 {
 241     struct acpi_acad_softc *sc;
 242     device_t    dev;
 243     int         retry;
 244
 245     dev = (device_t)arg;
 246     sc = device_get_softc(dev);
 247     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 248                 "acline initialization start\n");
 249
 250     for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
 251         acpi_acad_get_status(dev);
 252         if (sc->status != -1)
 253             break;
 254         AcpiOsSleep(10000);
 255     }
 256
 257     ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 258                 "acline initialization done, tried %d times\n", retry + 1);
 259 }
 260
 261 /*
 262  * If no AC line devices detected after boot, create an "online" event
 263  * so that userland code can adjust power settings accordingly.  The default
 264  * power profile is "performance" so we don't need to repeat that here.
 265  */
 266 static void
 267 acpi_acad_ac_only(void __unused *arg)
 268 {
 269
 270     if (devclass_get_count(acpi_acad_devclass) == 0)
 271         acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1);
 272 }
 273
 274 /*
 275  * Public interfaces.
 276  */
 277 int
 278 acpi_acad_get_acline(int *status)
 279 {
 280     struct acpi_acad_softc *sc;
 281     device_t dev;
 282
 283     dev = devclass_get_device(acpi_acad_devclass, 0);
 284     if (dev == NULL)
 285         return (ENXIO);
 286     sc = device_get_softc(dev);
 287
 288     acpi_acad_get_status(dev);
 289     *status = sc->status;
 290
 291     return (0);
 292 }