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/6.1/sys/i386/acpica/acpi_machdep.c 152152 2005-11-07 09:53:25Z obrien $");
   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 uint32_t acpi_reset_video = 1;
   56 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
   57 
   58 static int intr_model = ACPI_INTR_PIC;
   59 static int apm_active;
   60 
   61 static d_open_t apmopen;
   62 static d_close_t apmclose;
   63 static d_write_t apmwrite;
   64 static d_ioctl_t apmioctl;
   65 static d_poll_t apmpoll;
   66 
   67 static struct cdevsw apm_cdevsw = {
   68         .d_version =    D_VERSION,
   69         .d_open =       apmopen,
   70         .d_close =      apmclose,
   71         .d_write =      apmwrite,
   72         .d_ioctl =      apmioctl,
   73         .d_poll =       apmpoll,
   74         .d_name =       "apm",
   75 };
   76 
   77 static int
   78 acpi_capm_convert_battstate(struct  acpi_battinfo *battp)
   79 {
   80         int     state;
   81 
   82         state = APM_UNKNOWN;
   83 
   84         if (battp->state & ACPI_BATT_STAT_DISCHARG) {
   85                 if (battp->cap >= 50)
   86                         state = 0;      /* high */
   87                 else
   88                         state = 1;      /* low */
   89         }
   90         if (battp->state & ACPI_BATT_STAT_CRITICAL)
   91                 state = 2;              /* critical */
   92         if (battp->state & ACPI_BATT_STAT_CHARGING)
   93                 state = 3;              /* charging */
   94 
   95         /* If still unknown, determine it based on the battery capacity. */
   96         if (state == APM_UNKNOWN) {
   97                 if (battp->cap >= 50)
   98                         state = 0;      /* high */
   99                 else
  100                         state = 1;      /* low */
  101         }
  102 
  103         return (state);
  104 }
  105 
  106 static int
  107 acpi_capm_convert_battflags(struct  acpi_battinfo *battp)
  108 {
  109         int     flags;
  110 
  111         flags = 0;
  112 
  113         if (battp->cap >= 50)
  114                 flags |= APM_BATT_HIGH;
  115         else {
  116                 if (battp->state & ACPI_BATT_STAT_CRITICAL)
  117                         flags |= APM_BATT_CRITICAL;
  118                 else
  119                         flags |= APM_BATT_LOW;
  120         }
  121         if (battp->state & ACPI_BATT_STAT_CHARGING)
  122                 flags |= APM_BATT_CHARGING;
  123         if (battp->state == ACPI_BATT_STAT_NOT_PRESENT)
  124                 flags = APM_BATT_NOT_PRESENT;
  125 
  126         return (flags);
  127 }
  128 
  129 static int
  130 acpi_capm_get_info(apm_info_t aip)
  131 {
  132         int     acline;
  133         struct  acpi_battinfo batt;
  134 
  135         aip->ai_infoversion = 1;
  136         aip->ai_major       = 1;
  137         aip->ai_minor       = 2;
  138         aip->ai_status      = apm_active;
  139         aip->ai_capabilities= 0xff00;   /* unknown */
  140 
  141         if (acpi_acad_get_acline(&acline))
  142                 aip->ai_acline = APM_UNKNOWN;   /* unknown */
  143         else
  144                 aip->ai_acline = acline;        /* on/off */
  145 
  146         if (acpi_battery_get_battinfo(NULL, &batt) != 0) {
  147                 aip->ai_batt_stat = APM_UNKNOWN;
  148                 aip->ai_batt_life = APM_UNKNOWN;
  149                 aip->ai_batt_time = -1;          /* unknown */
  150                 aip->ai_batteries = ~0U;         /* unknown */
  151         } else {
  152                 aip->ai_batt_stat = acpi_capm_convert_battstate(&batt);
  153                 aip->ai_batt_life = batt.cap;
  154                 aip->ai_batt_time = (batt.min == -1) ? -1 : batt.min * 60;
  155                 aip->ai_batteries = acpi_battery_get_units();
  156         }
  157 
  158         return (0);
  159 }
  160 
  161 static int
  162 acpi_capm_get_pwstatus(apm_pwstatus_t app)
  163 {
  164         device_t dev;
  165         int     acline, unit, error;
  166         struct  acpi_battinfo batt;
  167 
  168         if (app->ap_device != PMDV_ALLDEV &&
  169             (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
  170                 return (1);
  171 
  172         if (app->ap_device == PMDV_ALLDEV)
  173                 error = acpi_battery_get_battinfo(NULL, &batt);
  174         else {
  175                 unit = app->ap_device - PMDV_BATT0;
  176                 dev = devclass_get_device(devclass_find("battery"), unit);
  177                 if (dev != NULL)
  178                         error = acpi_battery_get_battinfo(dev, &batt);
  179                 else
  180                         error = ENXIO;
  181         }
  182         if (error)
  183                 return (1);
  184 
  185         app->ap_batt_stat = acpi_capm_convert_battstate(&batt);
  186         app->ap_batt_flag = acpi_capm_convert_battflags(&batt);
  187         app->ap_batt_life = batt.cap;
  188         app->ap_batt_time = (batt.min == -1) ? -1 : batt.min * 60;
  189 
  190         if (acpi_acad_get_acline(&acline))
  191                 app->ap_acline = APM_UNKNOWN;
  192         else
  193                 app->ap_acline = acline;        /* on/off */
  194 
  195         return (0);
  196 }
  197 
  198 static int
  199 apmopen(struct cdev *dev, int flag, int fmt, d_thread_t *td)
  200 {
  201         return (0);
  202 }
  203 
  204 static int
  205 apmclose(struct cdev *dev, int flag, int fmt, d_thread_t *td)
  206 {
  207         return (0);
  208 }
  209 
  210 static int
  211 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
  212 {
  213         int     error = 0;
  214         struct  acpi_softc *acpi_sc;
  215         struct apm_info info;
  216         apm_info_old_t aiop;
  217 
  218         acpi_sc = devclass_get_softc(devclass_find("acpi"), 0);
  219 
  220         switch (cmd) {
  221         case APMIO_SUSPEND:
  222                 if ((flag & FWRITE) == 0)
  223                         return (EPERM);
  224                 if (apm_active)
  225                         acpi_SetSleepState(acpi_sc, acpi_sc->acpi_suspend_sx);
  226                 else
  227                         error = EINVAL;
  228                 break;
  229         case APMIO_STANDBY:
  230                 if ((flag & FWRITE) == 0)
  231                         return (EPERM);
  232                 if (apm_active)
  233                         acpi_SetSleepState(acpi_sc, acpi_sc->acpi_standby_sx);
  234                 else
  235                         error = EINVAL;
  236                 break;
  237         case APMIO_GETINFO_OLD:
  238                 if (acpi_capm_get_info(&info))
  239                         error = ENXIO;
  240                 aiop = (apm_info_old_t)addr;
  241                 aiop->ai_major = info.ai_major;
  242                 aiop->ai_minor = info.ai_minor;
  243                 aiop->ai_acline = info.ai_acline;
  244                 aiop->ai_batt_stat = info.ai_batt_stat;
  245                 aiop->ai_batt_life = info.ai_batt_life;
  246                 aiop->ai_status = info.ai_status;
  247                 break;
  248         case APMIO_GETINFO:
  249                 if (acpi_capm_get_info((apm_info_t)addr))
  250                         error = ENXIO;
  251                 break;
  252         case APMIO_GETPWSTATUS:
  253                 if (acpi_capm_get_pwstatus((apm_pwstatus_t)addr))
  254                         error = ENXIO;
  255                 break;
  256         case APMIO_ENABLE:
  257                 if ((flag & FWRITE) == 0)
  258                         return (EPERM);
  259                 apm_active = 1;
  260                 break;
  261         case APMIO_DISABLE:
  262                 if ((flag & FWRITE) == 0)
  263                         return (EPERM);
  264                 apm_active = 0;
  265                 break;
  266         case APMIO_HALTCPU:
  267                 break;
  268         case APMIO_NOTHALTCPU:
  269                 break;
  270         case APMIO_DISPLAY:
  271                 if ((flag & FWRITE) == 0)
  272                         return (EPERM);
  273                 break;
  274         case APMIO_BIOS:
  275                 if ((flag & FWRITE) == 0)
  276                         return (EPERM);
  277                 bzero(addr, sizeof(struct apm_bios_arg));
  278                 break;
  279         default:
  280                 error = EINVAL;
  281                 break;
  282         }
  283 
  284         return (error);
  285 }
  286 
  287 static int
  288 apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
  289 {
  290         return (uio->uio_resid);
  291 }
  292 
  293 static int
  294 apmpoll(struct cdev *dev, int events, d_thread_t *td)
  295 {
  296         return (0);
  297 }
  298 
  299 static void
  300 acpi_capm_init(struct acpi_softc *sc)
  301 {
  302         make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm");
  303 }
  304 
  305 int
  306 acpi_machdep_init(device_t dev)
  307 {
  308         struct  acpi_softc *sc;
  309 
  310         sc = devclass_get_softc(devclass_find("acpi"), 0);
  311         acpi_capm_init(sc);
  312 
  313         acpi_install_wakeup_handler(sc);
  314 
  315         if (intr_model == ACPI_INTR_PIC)
  316                 BUS_CONFIG_INTR(dev, AcpiGbl_FADT->SciInt, INTR_TRIGGER_LEVEL,
  317                     INTR_POLARITY_LOW);
  318         else
  319                 acpi_SetIntrModel(intr_model);
  320 
  321         SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
  322             SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
  323             "reset_video", CTLFLAG_RD | CTLFLAG_RW, &acpi_reset_video, 0,
  324             "Call the VESA reset BIOS vector on the resume path");
  325 
  326         return (0);
  327 }
  328 
  329 void
  330 acpi_SetDefaultIntrModel(int model)
  331 {
  332 
  333         intr_model = model;
  334 }
  335 
  336 /* Check BIOS date.  If 1998 or older, disable ACPI. */
  337 int
  338 acpi_machdep_quirks(int *quirks)
  339 {
  340         char *va;
  341         int year;
  342 
  343         /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */
  344         va = pmap_mapdev(0xffff0, 16);
  345         sscanf(va + 11, "%2d", &year);
  346         pmap_unmapdev((vm_offset_t)va, 16);
  347 
  348         /* 
  349          * Date must be >= 1/1/1999 or we don't trust ACPI.  Note that this
  350          * check must be changed by my 114th birthday.
  351          */
  352         if (year > 90 && year < 99)
  353                 *quirks = ACPI_Q_BROKEN;
  354 
  355         return (0);
  356 }
  357 
  358 void
  359 acpi_cpu_c1()
  360 {
  361         __asm __volatile("sti; hlt");
  362 }

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