The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/acpica/acpi_machdep.c

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    1 /*-
    2  * Copyright (c) 2001 Mitsuru IWASAKI
    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 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/6.2/sys/i386/acpica/acpi_machdep.c 161345 2006-08-16 04:01:49Z njl $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/bus.h>
   32 #include <sys/conf.h>
   33 #include <sys/fcntl.h>
   34 #include <sys/kernel.h>
   35 #include <sys/sysctl.h>
   36 #include <sys/uio.h>
   37 #include <vm/vm.h>
   38 #include <vm/pmap.h>
   39 
   40 #include <contrib/dev/acpica/acpi.h>
   41 #include <dev/acpica/acpivar.h>
   42 #include <dev/acpica/acpiio.h>
   43 
   44 /*
   45  * APM driver emulation 
   46  */
   47 
   48 #include <sys/selinfo.h>
   49 
   50 #include <machine/apm_bios.h>
   51 #include <machine/pc/bios.h>
   52 
   53 #include <i386/bios/apm.h>
   54 
   55 SYSCTL_DECL(_debug_acpi);
   56 
   57 uint32_t acpi_resume_beep;
   58 TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep);
   59 SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep,
   60     0, "Beep the PC speaker when resuming");
   61 uint32_t acpi_reset_video;
   62 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
   63 
   64 static int intr_model = ACPI_INTR_PIC;
   65 static int apm_active;
   66 
   67 static d_open_t apmopen;
   68 static d_close_t apmclose;
   69 static d_write_t apmwrite;
   70 static d_ioctl_t apmioctl;
   71 static d_poll_t apmpoll;
   72 
   73 static struct cdevsw apm_cdevsw = {
   74         .d_version =    D_VERSION,
   75         .d_open =       apmopen,
   76         .d_close =      apmclose,
   77         .d_write =      apmwrite,
   78         .d_ioctl =      apmioctl,
   79         .d_poll =       apmpoll,
   80         .d_name =       "apm",
   81 };
   82 
   83 static int
   84 acpi_capm_convert_battstate(struct  acpi_battinfo *battp)
   85 {
   86         int     state;
   87 
   88         state = APM_UNKNOWN;
   89 
   90         if (battp->state & ACPI_BATT_STAT_DISCHARG) {
   91                 if (battp->cap >= 50)
   92                         state = 0;      /* high */
   93                 else
   94                         state = 1;      /* low */
   95         }
   96         if (battp->state & ACPI_BATT_STAT_CRITICAL)
   97                 state = 2;              /* critical */
   98         if (battp->state & ACPI_BATT_STAT_CHARGING)
   99                 state = 3;              /* charging */
  100 
  101         /* If still unknown, determine it based on the battery capacity. */
  102         if (state == APM_UNKNOWN) {
  103                 if (battp->cap >= 50)
  104                         state = 0;      /* high */
  105                 else
  106                         state = 1;      /* low */
  107         }
  108 
  109         return (state);
  110 }
  111 
  112 static int
  113 acpi_capm_convert_battflags(struct  acpi_battinfo *battp)
  114 {
  115         int     flags;
  116 
  117         flags = 0;
  118 
  119         if (battp->cap >= 50)
  120                 flags |= APM_BATT_HIGH;
  121         else {
  122                 if (battp->state & ACPI_BATT_STAT_CRITICAL)
  123                         flags |= APM_BATT_CRITICAL;
  124                 else
  125                         flags |= APM_BATT_LOW;
  126         }
  127         if (battp->state & ACPI_BATT_STAT_CHARGING)
  128                 flags |= APM_BATT_CHARGING;
  129         if (battp->state == ACPI_BATT_STAT_NOT_PRESENT)
  130                 flags = APM_BATT_NOT_PRESENT;
  131 
  132         return (flags);
  133 }
  134 
  135 static int
  136 acpi_capm_get_info(apm_info_t aip)
  137 {
  138         int     acline;
  139         struct  acpi_battinfo batt;
  140 
  141         aip->ai_infoversion = 1;
  142         aip->ai_major       = 1;
  143         aip->ai_minor       = 2;
  144         aip->ai_status      = apm_active;
  145         aip->ai_capabilities= 0xff00;   /* unknown */
  146 
  147         if (acpi_acad_get_acline(&acline))
  148                 aip->ai_acline = APM_UNKNOWN;   /* unknown */
  149         else
  150                 aip->ai_acline = acline;        /* on/off */
  151 
  152         if (acpi_battery_get_battinfo(NULL, &batt) != 0) {
  153                 aip->ai_batt_stat = APM_UNKNOWN;
  154                 aip->ai_batt_life = APM_UNKNOWN;
  155                 aip->ai_batt_time = -1;          /* unknown */
  156                 aip->ai_batteries = ~0U;         /* unknown */
  157         } else {
  158                 aip->ai_batt_stat = acpi_capm_convert_battstate(&batt);
  159                 aip->ai_batt_life = batt.cap;
  160                 aip->ai_batt_time = (batt.min == -1) ? -1 : batt.min * 60;
  161                 aip->ai_batteries = acpi_battery_get_units();
  162         }
  163 
  164         return (0);
  165 }
  166 
  167 static int
  168 acpi_capm_get_pwstatus(apm_pwstatus_t app)
  169 {
  170         device_t dev;
  171         int     acline, unit, error;
  172         struct  acpi_battinfo batt;
  173 
  174         if (app->ap_device != PMDV_ALLDEV &&
  175             (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
  176                 return (1);
  177 
  178         if (app->ap_device == PMDV_ALLDEV)
  179                 error = acpi_battery_get_battinfo(NULL, &batt);
  180         else {
  181                 unit = app->ap_device - PMDV_BATT0;
  182                 dev = devclass_get_device(devclass_find("battery"), unit);
  183                 if (dev != NULL)
  184                         error = acpi_battery_get_battinfo(dev, &batt);
  185                 else
  186                         error = ENXIO;
  187         }
  188         if (error)
  189                 return (1);
  190 
  191         app->ap_batt_stat = acpi_capm_convert_battstate(&batt);
  192         app->ap_batt_flag = acpi_capm_convert_battflags(&batt);
  193         app->ap_batt_life = batt.cap;
  194         app->ap_batt_time = (batt.min == -1) ? -1 : batt.min * 60;
  195 
  196         if (acpi_acad_get_acline(&acline))
  197                 app->ap_acline = APM_UNKNOWN;
  198         else
  199                 app->ap_acline = acline;        /* on/off */
  200 
  201         return (0);
  202 }
  203 
  204 static int
  205 apmopen(struct cdev *dev, int flag, int fmt, d_thread_t *td)
  206 {
  207         return (0);
  208 }
  209 
  210 static int
  211 apmclose(struct cdev *dev, int flag, int fmt, d_thread_t *td)
  212 {
  213         return (0);
  214 }
  215 
  216 static int
  217 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
  218 {
  219         int     error = 0;
  220         struct  acpi_softc *acpi_sc;
  221         struct apm_info info;
  222         apm_info_old_t aiop;
  223 
  224         acpi_sc = devclass_get_softc(devclass_find("acpi"), 0);
  225 
  226         switch (cmd) {
  227         case APMIO_SUSPEND:
  228                 if ((flag & FWRITE) == 0)
  229                         return (EPERM);
  230                 if (apm_active)
  231                         acpi_SetSleepState(acpi_sc, acpi_sc->acpi_suspend_sx);
  232                 else
  233                         error = EINVAL;
  234                 break;
  235         case APMIO_STANDBY:
  236                 if ((flag & FWRITE) == 0)
  237                         return (EPERM);
  238                 if (apm_active)
  239                         acpi_SetSleepState(acpi_sc, acpi_sc->acpi_standby_sx);
  240                 else
  241                         error = EINVAL;
  242                 break;
  243         case APMIO_GETINFO_OLD:
  244                 if (acpi_capm_get_info(&info))
  245                         error = ENXIO;
  246                 aiop = (apm_info_old_t)addr;
  247                 aiop->ai_major = info.ai_major;
  248                 aiop->ai_minor = info.ai_minor;
  249                 aiop->ai_acline = info.ai_acline;
  250                 aiop->ai_batt_stat = info.ai_batt_stat;
  251                 aiop->ai_batt_life = info.ai_batt_life;
  252                 aiop->ai_status = info.ai_status;
  253                 break;
  254         case APMIO_GETINFO:
  255                 if (acpi_capm_get_info((apm_info_t)addr))
  256                         error = ENXIO;
  257                 break;
  258         case APMIO_GETPWSTATUS:
  259                 if (acpi_capm_get_pwstatus((apm_pwstatus_t)addr))
  260                         error = ENXIO;
  261                 break;
  262         case APMIO_ENABLE:
  263                 if ((flag & FWRITE) == 0)
  264                         return (EPERM);
  265                 apm_active = 1;
  266                 break;
  267         case APMIO_DISABLE:
  268                 if ((flag & FWRITE) == 0)
  269                         return (EPERM);
  270                 apm_active = 0;
  271                 break;
  272         case APMIO_HALTCPU:
  273                 break;
  274         case APMIO_NOTHALTCPU:
  275                 break;
  276         case APMIO_DISPLAY:
  277                 if ((flag & FWRITE) == 0)
  278                         return (EPERM);
  279                 break;
  280         case APMIO_BIOS:
  281                 if ((flag & FWRITE) == 0)
  282                         return (EPERM);
  283                 bzero(addr, sizeof(struct apm_bios_arg));
  284                 break;
  285         default:
  286                 error = EINVAL;
  287                 break;
  288         }
  289 
  290         return (error);
  291 }
  292 
  293 static int
  294 apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
  295 {
  296         return (uio->uio_resid);
  297 }
  298 
  299 static int
  300 apmpoll(struct cdev *dev, int events, d_thread_t *td)
  301 {
  302         return (0);
  303 }
  304 
  305 static void
  306 acpi_capm_init(struct acpi_softc *sc)
  307 {
  308         make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm");
  309 }
  310 
  311 int
  312 acpi_machdep_init(device_t dev)
  313 {
  314         struct  acpi_softc *sc;
  315 
  316         sc = devclass_get_softc(devclass_find("acpi"), 0);
  317         acpi_capm_init(sc);
  318 
  319         acpi_install_wakeup_handler(sc);
  320 
  321         if (intr_model == ACPI_INTR_PIC)
  322                 BUS_CONFIG_INTR(dev, AcpiGbl_FADT->SciInt, INTR_TRIGGER_LEVEL,
  323                     INTR_POLARITY_LOW);
  324         else
  325                 acpi_SetIntrModel(intr_model);
  326 
  327         SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
  328             SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
  329             "reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
  330             "Call the VESA reset BIOS vector on the resume path");
  331 
  332         return (0);
  333 }
  334 
  335 void
  336 acpi_SetDefaultIntrModel(int model)
  337 {
  338 
  339         intr_model = model;
  340 }
  341 
  342 /* Check BIOS date.  If 1998 or older, disable ACPI. */
  343 int
  344 acpi_machdep_quirks(int *quirks)
  345 {
  346         char *va;
  347         int year;
  348 
  349         /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */
  350         va = pmap_mapdev(0xffff0, 16);
  351         sscanf(va + 11, "%2d", &year);
  352         pmap_unmapdev((vm_offset_t)va, 16);
  353 
  354         /* 
  355          * Date must be >= 1/1/1999 or we don't trust ACPI.  Note that this
  356          * check must be changed by my 114th birthday.
  357          */
  358         if (year > 90 && year < 99)
  359                 *quirks = ACPI_Q_BROKEN;
  360 
  361         return (0);
  362 }
  363 
  364 void
  365 acpi_cpu_c1()
  366 {
  367         __asm __volatile("sti; hlt");
  368 }

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