acpi_toshiba.c

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    1 /*-
    2  * Copyright (c) 2003 Hiroyuki Aizu <aizu@navi.org>
    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/acpi_support/acpi_toshiba.c,v 1.18 2009/06/05 18:44:36 jkim
   27  */
   28 
   29 #include "opt_acpi.h"
   30 #include <sys/param.h>
   31 #include <sys/kernel.h>
   32 #include <sys/module.h>
   33 #include <sys/bus.h>
   34 
   35 #include "acpi.h"
   36 
   37 #include <dev/acpica/acpivar.h>
   38 
   39 #define _COMPONENT      ACPI_OEM
   40 ACPI_MODULE_NAME("Toshiba")
   41 
   42 /*
   43  * Toshiba HCI interface definitions
   44  *
   45  * HCI is Toshiba's "Hardware Control Interface" which is supposed to
   46  * be uniform across all their models.  Ideally we would just call
   47  * dedicated ACPI methods instead of using this primitive interface.
   48  * However, the ACPI methods seem to be incomplete in some areas (for
   49  * example they allow setting, but not reading, the LCD brightness
   50  * value), so this is still useful.
   51  */
   52 
   53 #define METHOD_HCI              "GHCI"
   54 #define METHOD_HCI_ENABLE       "ENAB"
   55 #define METHOD_VIDEO            "DSSX"
   56 
   57 /* Operations */
   58 #define HCI_SET                         0xFF00
   59 #define HCI_GET                         0xFE00
   60 
   61 /* Return codes */
   62 #define HCI_SUCCESS                     0x0000
   63 #define HCI_FAILURE                     0x1000
   64 #define HCI_NOT_SUPPORTED               0x8000
   65 #define HCI_EMPTY                       0x8C00
   66 
   67 /* Functions */
   68 #define HCI_REG_LCD_BACKLIGHT           0x0002
   69 #define HCI_REG_FAN                     0x0004
   70 #define HCI_REG_SYSTEM_EVENT            0x0016
   71 #define HCI_REG_VIDEO_OUTPUT            0x001C
   72 #define HCI_REG_HOTKEY_EVENT            0x001E
   73 #define HCI_REG_LCD_BRIGHTNESS          0x002A
   74 #define HCI_REG_CPU_SPEED               0x0032
   75 
   76 /* Field definitions */
   77 #define HCI_FAN_SHIFT                   7
   78 #define HCI_LCD_BRIGHTNESS_BITS         3
   79 #define HCI_LCD_BRIGHTNESS_SHIFT        (16 - HCI_LCD_BRIGHTNESS_BITS)
   80 #define HCI_LCD_BRIGHTNESS_MAX          ((1 << HCI_LCD_BRIGHTNESS_BITS) - 1)
   81 #define HCI_VIDEO_OUTPUT_FLAG           0x0100
   82 #define HCI_VIDEO_OUTPUT_LCD            0x1
   83 #define HCI_VIDEO_OUTPUT_CRT            0x2
   84 #define HCI_VIDEO_OUTPUT_TV             0x4
   85 #define HCI_CPU_SPEED_BITS              3
   86 #define HCI_CPU_SPEED_SHIFT             (16 - HCI_CPU_SPEED_BITS)
   87 #define HCI_CPU_SPEED_MAX               ((1 << HCI_CPU_SPEED_BITS) - 1)
   88 
   89 /* Key press/release events. */
   90 #define FN_F1_PRESS     0x013B
   91 #define FN_F1_RELEASE   0x01BB
   92 #define FN_F2_PRESS     0x013C
   93 #define FN_F2_RELEASE   0x01BC
   94 #define FN_F3_PRESS     0x013D
   95 #define FN_F3_RELEASE   0x01BD
   96 #define FN_F4_PRESS     0x013E
   97 #define FN_F4_RELEASE   0x01BE
   98 #define FN_F5_PRESS     0x013F
   99 #define FN_F5_RELEASE   0x01BF
  100 #define FN_F6_PRESS     0x0140
  101 #define FN_F6_RELEASE   0x01C0
  102 #define FN_F7_PRESS     0x0141
  103 #define FN_F7_RELEASE   0x01C1
  104 #define FN_F8_PRESS     0x0142
  105 #define FN_F8_RELEASE   0x01C2
  106 #define FN_F9_PRESS     0x0143
  107 #define FN_F9_RELEASE   0x01C3
  108 #define FN_BS_PRESS     0x010E
  109 #define FN_BS_RELEASE   0x018E
  110 #define FN_ESC_PRESS    0x0101
  111 #define FN_ESC_RELEASE  0x0181
  112 #define FN_KNJ_PRESS    0x0129
  113 #define FN_KNJ_RELEASE  0x01A9
  114 
  115 /* HCI register definitions. */
  116 #define HCI_WORDS       6               /* Number of registers */
  117 #define HCI_REG_AX      0               /* Operation, then return value */
  118 #define HCI_REG_BX      1               /* Function */
  119 #define HCI_REG_CX      2               /* Argument (in or out) */
  120 #define HCI_REG_DX      3               /* Unused? */
  121 #define HCI_REG_SI      4               /* Unused? */
  122 #define HCI_REG_DI      5               /* Unused? */
  123 
  124 struct acpi_toshiba_softc {
  125         device_t        dev;
  126         ACPI_HANDLE     handle;
  127         ACPI_HANDLE     video_handle;
  128         struct          sysctl_ctx_list sysctl_ctx;
  129         struct          sysctl_oid *sysctl_tree;
  130 };
  131 
  132 /* Prototype for HCI functions for getting/setting a value. */
  133 typedef int     hci_fn_t(ACPI_HANDLE, int, UINT32 *);
  134 
  135 static int      acpi_toshiba_probe(device_t dev);
  136 static int      acpi_toshiba_attach(device_t dev);
  137 static int      acpi_toshiba_detach(device_t dev);
  138 static int      acpi_toshiba_sysctl(SYSCTL_HANDLER_ARGS);
  139 static hci_fn_t hci_force_fan;
  140 static hci_fn_t hci_video_output;
  141 static hci_fn_t hci_lcd_brightness;
  142 static hci_fn_t hci_lcd_backlight;
  143 static hci_fn_t hci_cpu_speed;
  144 static int      hci_call(ACPI_HANDLE h, int op, int function, UINT32 *arg);
  145 static void     hci_key_action(struct acpi_toshiba_softc *sc, ACPI_HANDLE h,
  146                     UINT32 key);
  147 static void     acpi_toshiba_notify(ACPI_HANDLE h, UINT32 notify,
  148                     void *context);
  149 static int      acpi_toshiba_video_probe(device_t dev);
  150 static int      acpi_toshiba_video_attach(device_t dev);
  151 
  152 ACPI_SERIAL_DECL(toshiba, "ACPI Toshiba Extras");
  153 
  154 /* Table of sysctl names and HCI functions to call. */
  155 static struct {
  156         char            *name;
  157         hci_fn_t        *handler;
  158 } sysctl_table[] = {
  159         /* name,                handler */
  160         {"force_fan",           hci_force_fan},
  161         {"video_output",        hci_video_output},
  162         {"lcd_brightness",      hci_lcd_brightness},
  163         {"lcd_backlight",       hci_lcd_backlight},
  164         {"cpu_speed",           hci_cpu_speed},
  165         {NULL, NULL}
  166 };
  167 
  168 static device_method_t acpi_toshiba_methods[] = {
  169         DEVMETHOD(device_probe,         acpi_toshiba_probe),
  170         DEVMETHOD(device_attach,        acpi_toshiba_attach),
  171         DEVMETHOD(device_detach,        acpi_toshiba_detach),
  172 
  173         DEVMETHOD_END
  174 };
  175 
  176 static driver_t acpi_toshiba_driver = {
  177         "acpi_toshiba",
  178         acpi_toshiba_methods,
  179         sizeof(struct acpi_toshiba_softc),
  180 };
  181 
  182 static devclass_t acpi_toshiba_devclass;
  183 DRIVER_MODULE(acpi_toshiba, acpi, acpi_toshiba_driver, acpi_toshiba_devclass,
  184     0, 0);
  185 MODULE_DEPEND(acpi_toshiba, acpi, 1, 1, 1);
  186 
  187 static device_method_t acpi_toshiba_video_methods[] = {
  188         DEVMETHOD(device_probe,         acpi_toshiba_video_probe),
  189         DEVMETHOD(device_attach,        acpi_toshiba_video_attach),
  190 
  191         DEVMETHOD_END
  192 };
  193 
  194 static driver_t acpi_toshiba_video_driver = {
  195         "acpi_toshiba_video",
  196         acpi_toshiba_video_methods,
  197         0,
  198 };
  199 
  200 static devclass_t acpi_toshiba_video_devclass;
  201 DRIVER_MODULE(acpi_toshiba_video, acpi, acpi_toshiba_video_driver,
  202     acpi_toshiba_video_devclass, 0, 0);
  203 MODULE_DEPEND(acpi_toshiba_video, acpi, 1, 1, 1);
  204 
  205 static int      enable_fn_keys = 1;
  206 TUNABLE_INT("hw.acpi.toshiba.enable_fn_keys", &enable_fn_keys);
  207 
  208 /*
  209  * HID      Model
  210  * -------------------------------------
  211  * TOS6200  Libretto L Series
  212  *          Dynabook Satellite 2455
  213  *          Dynabook SS 3500
  214  * TOS6207  Dynabook SS2110 Series
  215  * TOS6208  SPA40
  216  */
  217 static int
  218 acpi_toshiba_probe(device_t dev)
  219 {
  220         static char *tosh_ids[] = { "TOS6200", "TOS6207", "TOS6208", NULL };
  221 
  222         if (acpi_disabled("toshiba") ||
  223             ACPI_ID_PROBE(device_get_parent(dev), dev, tosh_ids) == NULL ||
  224             device_get_unit(dev) != 0)
  225                 return (ENXIO);
  226 
  227         device_set_desc(dev, "Toshiba HCI Extras");
  228         return (0);
  229 }
  230 
  231 static int
  232 acpi_toshiba_attach(device_t dev)
  233 {
  234         struct          acpi_toshiba_softc *sc;
  235         struct          acpi_softc *acpi_sc;
  236         ACPI_STATUS     status;
  237         int             i;
  238 
  239         sc = device_get_softc(dev);
  240         sc->dev = dev;
  241         sc->handle = acpi_get_handle(dev);
  242 
  243         acpi_sc = acpi_device_get_parent_softc(dev);
  244         sysctl_ctx_init(&sc->sysctl_ctx);
  245         sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
  246             SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO,
  247             "toshiba", CTLFLAG_RD, 0, "");
  248 
  249         for (i = 0; sysctl_table[i].name != NULL; i++) {
  250                 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
  251                     SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
  252                     sysctl_table[i].name,
  253                     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY,
  254                     sc, i, acpi_toshiba_sysctl, "I", "");
  255         }
  256 
  257         if (enable_fn_keys != 0) {
  258                 status = AcpiEvaluateObject(sc->handle, METHOD_HCI_ENABLE,
  259                                             NULL, NULL);
  260                 if (ACPI_FAILURE(status)) {
  261                         device_printf(dev, "enable FN keys failed\n");
  262                         sysctl_ctx_free(&sc->sysctl_ctx);
  263                         return (ENXIO);
  264                 }
  265                 AcpiInstallNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
  266                                          acpi_toshiba_notify, sc);
  267         }
  268 
  269         return (0);
  270 }
  271 
  272 static int
  273 acpi_toshiba_detach(device_t dev)
  274 {
  275         struct          acpi_toshiba_softc *sc;
  276 
  277         sc = device_get_softc(dev);
  278         if (enable_fn_keys != 0) {
  279                 AcpiRemoveNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
  280                                         acpi_toshiba_notify);
  281         }
  282         sysctl_ctx_free(&sc->sysctl_ctx);
  283 
  284         return (0);
  285 }
  286 
  287 static int
  288 acpi_toshiba_sysctl(SYSCTL_HANDLER_ARGS)
  289 {
  290         struct          acpi_toshiba_softc *sc;
  291         UINT32          arg;
  292         int             function, error = 0;
  293         hci_fn_t        *handler;
  294 
  295         sc = (struct acpi_toshiba_softc *)oidp->oid_arg1;
  296         function = oidp->oid_arg2;
  297         handler = sysctl_table[function].handler;
  298 
  299         /* Get the current value from the appropriate function. */
  300         ACPI_SERIAL_BEGIN(toshiba);
  301         error = handler(sc->handle, HCI_GET, &arg);
  302         if (error != 0)
  303                 goto out;
  304 
  305         /* Send the current value to the user and return if no new value. */
  306         error = sysctl_handle_int(oidp, &arg, 0, req);
  307         if (error != 0 || req->newptr == NULL)
  308                 goto out;
  309 
  310         /* Set the new value via the appropriate function. */
  311         error = handler(sc->handle, HCI_SET, &arg);
  312 
  313 out:
  314         ACPI_SERIAL_END(toshiba);
  315         return (error);
  316 }
  317 
  318 static int
  319 hci_force_fan(ACPI_HANDLE h, int op, UINT32 *state)
  320 {
  321         int             ret;
  322 
  323         ACPI_SERIAL_ASSERT(toshiba);
  324         if (op == HCI_SET) {
  325                 if (*state < 0 || *state > 1)
  326                         return (EINVAL);
  327                 *state <<= HCI_FAN_SHIFT;
  328         }
  329         ret = hci_call(h, op, HCI_REG_FAN, state);
  330         if (ret == 0 && op == HCI_GET)
  331                 *state >>= HCI_FAN_SHIFT;
  332         return (ret);
  333 }
  334 
  335 static int
  336 hci_video_output(ACPI_HANDLE h, int op, UINT32 *video_output)
  337 {
  338         int             ret;
  339         ACPI_STATUS     status;
  340 
  341         ACPI_SERIAL_ASSERT(toshiba);
  342         if (op == HCI_SET) {
  343                 if (*video_output < 1 || *video_output > 7)
  344                         return (EINVAL);
  345                 if (h == NULL)
  346                         return (ENXIO);
  347                 *video_output |= HCI_VIDEO_OUTPUT_FLAG;
  348                 status = acpi_SetInteger(h, METHOD_VIDEO, *video_output);
  349                 if (ACPI_SUCCESS(status))
  350                         ret = 0;
  351                 else
  352                         ret = ENXIO;
  353         } else {
  354                 ret = hci_call(h, op, HCI_REG_VIDEO_OUTPUT, video_output);
  355                 if (ret == 0)
  356                         *video_output &= 0xff;
  357         }
  358 
  359         return (ret);
  360 }
  361 
  362 static int
  363 hci_lcd_brightness(ACPI_HANDLE h, int op, UINT32 *brightness)
  364 {
  365         int             ret;
  366 
  367         ACPI_SERIAL_ASSERT(toshiba);
  368         if (op == HCI_SET) {
  369                 if (*brightness < 0 || *brightness > HCI_LCD_BRIGHTNESS_MAX)
  370                         return (EINVAL);
  371                 *brightness <<= HCI_LCD_BRIGHTNESS_SHIFT;
  372         }
  373         ret = hci_call(h, op, HCI_REG_LCD_BRIGHTNESS, brightness);
  374         if (ret == 0 && op == HCI_GET)
  375                 *brightness >>= HCI_LCD_BRIGHTNESS_SHIFT;
  376         return (ret);
  377 }
  378 
  379 static int
  380 hci_lcd_backlight(ACPI_HANDLE h, int op, UINT32 *backlight)
  381 {
  382 
  383         ACPI_SERIAL_ASSERT(toshiba);
  384         if (op == HCI_SET) {
  385                 if (*backlight < 0 || *backlight > 1)
  386                         return (EINVAL);
  387         }
  388         return (hci_call(h, op, HCI_REG_LCD_BACKLIGHT, backlight));
  389 }
  390 
  391 static int
  392 hci_cpu_speed(ACPI_HANDLE h, int op, UINT32 *speed)
  393 {
  394         int             ret;
  395 
  396         ACPI_SERIAL_ASSERT(toshiba);
  397         if (op == HCI_SET) {
  398                 if (*speed < 0 || *speed > HCI_CPU_SPEED_MAX)
  399                         return (EINVAL);
  400                 *speed <<= HCI_CPU_SPEED_SHIFT;
  401         }
  402         ret = hci_call(h, op, HCI_REG_CPU_SPEED, speed);
  403         if (ret == 0 && op == HCI_GET)
  404                 *speed >>= HCI_CPU_SPEED_SHIFT;
  405         return (ret);
  406 }
  407 
  408 static int
  409 hci_call(ACPI_HANDLE h, int op, int function, UINT32 *arg)
  410 {
  411         ACPI_OBJECT_LIST args;
  412         ACPI_BUFFER     results;
  413         ACPI_OBJECT     obj[HCI_WORDS];
  414         ACPI_OBJECT     *res;
  415         int             status, i, ret;
  416 
  417         ACPI_SERIAL_ASSERT(toshiba);
  418         status = ENXIO;
  419 
  420         for (i = 0; i < HCI_WORDS; i++) {
  421                 obj[i].Type = ACPI_TYPE_INTEGER;
  422                 obj[i].Integer.Value = 0;
  423         }
  424         obj[HCI_REG_AX].Integer.Value = op;
  425         obj[HCI_REG_BX].Integer.Value = function;
  426         if (op == HCI_SET)
  427                 obj[HCI_REG_CX].Integer.Value = *arg;
  428 
  429         args.Count = HCI_WORDS;
  430         args.Pointer = obj;
  431         results.Pointer = NULL;
  432         results.Length = ACPI_ALLOCATE_BUFFER;
  433         if (ACPI_FAILURE(AcpiEvaluateObject(h, METHOD_HCI, &args, &results)))
  434                 goto end;
  435         res = (ACPI_OBJECT *)results.Pointer;
  436         if (!ACPI_PKG_VALID(res, HCI_WORDS)) {
  437                 kprintf("toshiba: invalid package!\n");
  438                 return (ENXIO);
  439         }
  440 
  441         acpi_PkgInt32(res, HCI_REG_AX, &ret);
  442         if (ret == HCI_SUCCESS) {
  443                 if (op == HCI_GET)
  444                         acpi_PkgInt32(res, HCI_REG_CX, arg);
  445                 status = 0;
  446         } else if (function == HCI_REG_SYSTEM_EVENT && op == HCI_GET &&
  447             ret == HCI_NOT_SUPPORTED) {
  448                 /*
  449                  * Sometimes system events are disabled without us requesting
  450                  * it.  This workaround attempts to re-enable them.
  451                  *
  452                  * XXX This call probably shouldn't be recursive.  Queueing
  453                  * a task via AcpiOsQueueForExecution() might be better.
  454                  */
  455                  i = 1;
  456                  hci_call(h, HCI_SET, HCI_REG_SYSTEM_EVENT, &i);
  457         }
  458 
  459 end:
  460         if (results.Pointer != NULL)
  461                 AcpiOsFree(results.Pointer);
  462 
  463         return (status);
  464 }
  465 
  466 /*
  467  * Perform a few actions based on the keypress.  Users can extend this
  468  * functionality by reading the keystrokes we send to devd(8).
  469  */
  470 static void
  471 hci_key_action(struct acpi_toshiba_softc *sc, ACPI_HANDLE h, UINT32 key)
  472 {
  473         UINT32          arg;
  474 
  475         ACPI_SERIAL_ASSERT(toshiba);
  476         switch (key) {
  477         case FN_F6_RELEASE:
  478                 /* Decrease LCD brightness. */
  479                 hci_lcd_brightness(h, HCI_GET, &arg);
  480                 if (arg-- == 0)
  481                         arg = 0;
  482                 else
  483                         hci_lcd_brightness(h, HCI_SET, &arg);
  484                 break;
  485         case FN_F7_RELEASE:
  486                 /* Increase LCD brightness. */
  487                 hci_lcd_brightness(h, HCI_GET, &arg);
  488                 if (arg++ == 7)
  489                         arg = 7;
  490                 else
  491                         hci_lcd_brightness(h, HCI_SET, &arg);
  492                 break;
  493         case FN_F5_RELEASE:
  494                 /* Cycle through video outputs. */
  495                 hci_video_output(h, HCI_GET, &arg);
  496                 arg = (arg + 1) % 7;
  497                 hci_video_output(sc->video_handle, HCI_SET, &arg);
  498                 break;
  499         case FN_F8_RELEASE:
  500                 /* Toggle LCD backlight. */
  501                 hci_lcd_backlight(h, HCI_GET, &arg);
  502                 arg = (arg != 0) ? 0 : 1;
  503                 hci_lcd_backlight(h, HCI_SET, &arg);
  504                 break;
  505         case FN_ESC_RELEASE:
  506                 /* Toggle forcing fan on. */
  507                 hci_force_fan(h, HCI_GET, &arg);
  508                 arg = (arg != 0) ? 0 : 1;
  509                 hci_force_fan(h, HCI_SET, &arg);
  510                 break;
  511         }
  512 }
  513 
  514 static void
  515 acpi_toshiba_notify(ACPI_HANDLE h, UINT32 notify, void *context)
  516 {
  517         struct          acpi_toshiba_softc *sc;
  518         UINT32          key;
  519 
  520         sc = (struct acpi_toshiba_softc *)context;
  521 
  522         if (notify == 0x80) {
  523                 ACPI_SERIAL_BEGIN(toshiba);
  524                 while (hci_call(h, HCI_GET, HCI_REG_SYSTEM_EVENT, &key) == 0) {
  525                         hci_key_action(sc, h, key);
  526                         acpi_UserNotify("TOSHIBA", h, (uint8_t)key);
  527                 }
  528                 ACPI_SERIAL_END(toshiba);
  529         } else
  530                 device_printf(sc->dev, "unknown notify: 0x%x\n", notify);
  531 }
  532 
  533 /*
  534  * Toshiba video pseudo-device to provide the DSSX method.
  535  *
  536  * HID      Model
  537  * -------------------------------------
  538  * TOS6201  Libretto L Series
  539  */
  540 static int
  541 acpi_toshiba_video_probe(device_t dev)
  542 {
  543         static char *vid_ids[] = { "TOS6201", NULL };
  544 
  545         if (acpi_disabled("toshiba") ||
  546             ACPI_ID_PROBE(device_get_parent(dev), dev, vid_ids) == NULL ||
  547             device_get_unit(dev) != 0)
  548                 return (ENXIO);
  549 
  550         device_quiet(dev);
  551         device_set_desc(dev, "Toshiba Video");
  552         return (0);
  553 }
  554 
  555 static int
  556 acpi_toshiba_video_attach(device_t dev)
  557 {
  558         struct          acpi_toshiba_softc *sc;
  559 
  560         sc = devclass_get_softc(acpi_toshiba_devclass, 0);
  561         if (sc == NULL)
  562                 return (ENXIO);
  563         sc->video_handle = acpi_get_handle(dev);
  564         return (0);
  565 }
Cache object: 8b4311c695cda43565430dc67ba5868c
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FreeBSD/Linux Kernel Cross Reference sys/dev/acpica/acpi_toshiba/acpi_toshiba.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/acpi_toshiba/acpi_toshiba.c
