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  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/8.4/sys/dev/acpi_support/acpi_toshiba.c 193530 2009-06-05 18:44:36Z jkim $");
   30 
   31 #include "opt_acpi.h"
   32 #include <sys/param.h>
   33 #include <sys/kernel.h>
   34 #include <sys/module.h>
   35 #include <sys/bus.h>
   36 
   37 #include <contrib/dev/acpica/include/acpi.h>
   38 
   39 #include <dev/acpica/acpivar.h>
   40 
   41 #define _COMPONENT      ACPI_OEM
   42 ACPI_MODULE_NAME("Toshiba")
   43 
   44 /*
   45  * Toshiba HCI interface definitions
   46  *
   47  * HCI is Toshiba's "Hardware Control Interface" which is supposed to
   48  * be uniform across all their models.  Ideally we would just call
   49  * dedicated ACPI methods instead of using this primitive interface.
   50  * However, the ACPI methods seem to be incomplete in some areas (for
   51  * example they allow setting, but not reading, the LCD brightness
   52  * value), so this is still useful.
   53  */
   54 
   55 #define METHOD_HCI              "GHCI"
   56 #define METHOD_HCI_ENABLE       "ENAB"
   57 #define METHOD_VIDEO            "DSSX"
   58 
   59 /* Operations */
   60 #define HCI_SET                         0xFF00
   61 #define HCI_GET                         0xFE00
   62 
   63 /* Return codes */
   64 #define HCI_SUCCESS                     0x0000
   65 #define HCI_FAILURE                     0x1000
   66 #define HCI_NOT_SUPPORTED               0x8000
   67 #define HCI_EMPTY                       0x8C00
   68 
   69 /* Functions */
   70 #define HCI_REG_LCD_BACKLIGHT           0x0002
   71 #define HCI_REG_FAN                     0x0004
   72 #define HCI_REG_SYSTEM_EVENT            0x0016
   73 #define HCI_REG_VIDEO_OUTPUT            0x001C
   74 #define HCI_REG_HOTKEY_EVENT            0x001E
   75 #define HCI_REG_LCD_BRIGHTNESS          0x002A
   76 #define HCI_REG_CPU_SPEED               0x0032
   77 
   78 /* Field definitions */
   79 #define HCI_FAN_SHIFT                   7
   80 #define HCI_LCD_BRIGHTNESS_BITS         3
   81 #define HCI_LCD_BRIGHTNESS_SHIFT        (16 - HCI_LCD_BRIGHTNESS_BITS)
   82 #define HCI_LCD_BRIGHTNESS_MAX          ((1 << HCI_LCD_BRIGHTNESS_BITS) - 1)
   83 #define HCI_VIDEO_OUTPUT_FLAG           0x0100
   84 #define HCI_VIDEO_OUTPUT_LCD            0x1
   85 #define HCI_VIDEO_OUTPUT_CRT            0x2
   86 #define HCI_VIDEO_OUTPUT_TV             0x4
   87 #define HCI_CPU_SPEED_BITS              3
   88 #define HCI_CPU_SPEED_SHIFT             (16 - HCI_CPU_SPEED_BITS)
   89 #define HCI_CPU_SPEED_MAX               ((1 << HCI_CPU_SPEED_BITS) - 1)
   90 
   91 /* Key press/release events. */
   92 #define FN_F1_PRESS     0x013B
   93 #define FN_F1_RELEASE   0x01BB
   94 #define FN_F2_PRESS     0x013C
   95 #define FN_F2_RELEASE   0x01BC
   96 #define FN_F3_PRESS     0x013D
   97 #define FN_F3_RELEASE   0x01BD
   98 #define FN_F4_PRESS     0x013E
   99 #define FN_F4_RELEASE   0x01BE
  100 #define FN_F5_PRESS     0x013F
  101 #define FN_F5_RELEASE   0x01BF
  102 #define FN_F6_PRESS     0x0140
  103 #define FN_F6_RELEASE   0x01C0
  104 #define FN_F7_PRESS     0x0141
  105 #define FN_F7_RELEASE   0x01C1
  106 #define FN_F8_PRESS     0x0142
  107 #define FN_F8_RELEASE   0x01C2
  108 #define FN_F9_PRESS     0x0143
  109 #define FN_F9_RELEASE   0x01C3
  110 #define FN_BS_PRESS     0x010E
  111 #define FN_BS_RELEASE   0x018E
  112 #define FN_ESC_PRESS    0x0101
  113 #define FN_ESC_RELEASE  0x0181
  114 #define FN_KNJ_PRESS    0x0129
  115 #define FN_KNJ_RELEASE  0x01A9
  116 
  117 /* HCI register definitions. */
  118 #define HCI_WORDS       6               /* Number of registers */
  119 #define HCI_REG_AX      0               /* Operation, then return value */
  120 #define HCI_REG_BX      1               /* Function */
  121 #define HCI_REG_CX      2               /* Argument (in or out) */
  122 #define HCI_REG_DX      3               /* Unused? */
  123 #define HCI_REG_SI      4               /* Unused? */
  124 #define HCI_REG_DI      5               /* Unused? */
  125 
  126 struct acpi_toshiba_softc {
  127         device_t        dev;
  128         ACPI_HANDLE     handle;
  129         ACPI_HANDLE     video_handle;
  130         struct          sysctl_ctx_list sysctl_ctx;
  131         struct          sysctl_oid *sysctl_tree;
  132 };
  133 
  134 /* Prototype for HCI functions for getting/setting a value. */
  135 typedef int     hci_fn_t(ACPI_HANDLE, int, UINT32 *);
  136 
  137 static int      acpi_toshiba_probe(device_t dev);
  138 static int      acpi_toshiba_attach(device_t dev);
  139 static int      acpi_toshiba_detach(device_t dev);
  140 static int      acpi_toshiba_sysctl(SYSCTL_HANDLER_ARGS);
  141 static hci_fn_t hci_force_fan;
  142 static hci_fn_t hci_video_output;
  143 static hci_fn_t hci_lcd_brightness;
  144 static hci_fn_t hci_lcd_backlight;
  145 static hci_fn_t hci_cpu_speed;
  146 static int      hci_call(ACPI_HANDLE h, int op, int function, UINT32 *arg);
  147 static void     hci_key_action(struct acpi_toshiba_softc *sc, ACPI_HANDLE h,
  148                     UINT32 key);
  149 static void     acpi_toshiba_notify(ACPI_HANDLE h, UINT32 notify,
  150                     void *context);
  151 static int      acpi_toshiba_video_probe(device_t dev);
  152 static int      acpi_toshiba_video_attach(device_t dev);
  153 
  154 ACPI_SERIAL_DECL(toshiba, "ACPI Toshiba Extras");
  155 
  156 /* Table of sysctl names and HCI functions to call. */
  157 static struct {
  158         char            *name;
  159         hci_fn_t        *handler;
  160 } sysctl_table[] = {
  161         /* name,                handler */
  162         {"force_fan",           hci_force_fan},
  163         {"video_output",        hci_video_output},
  164         {"lcd_brightness",      hci_lcd_brightness},
  165         {"lcd_backlight",       hci_lcd_backlight},
  166         {"cpu_speed",           hci_cpu_speed},
  167         {NULL, NULL}
  168 };
  169 
  170 static device_method_t acpi_toshiba_methods[] = {
  171         DEVMETHOD(device_probe,         acpi_toshiba_probe),
  172         DEVMETHOD(device_attach,        acpi_toshiba_attach),
  173         DEVMETHOD(device_detach,        acpi_toshiba_detach),
  174 
  175         {0, 0}
  176 };
  177 
  178 static driver_t acpi_toshiba_driver = {
  179         "acpi_toshiba",
  180         acpi_toshiba_methods,
  181         sizeof(struct acpi_toshiba_softc),
  182 };
  183 
  184 static devclass_t acpi_toshiba_devclass;
  185 DRIVER_MODULE(acpi_toshiba, acpi, acpi_toshiba_driver, acpi_toshiba_devclass,
  186     0, 0);
  187 MODULE_DEPEND(acpi_toshiba, acpi, 1, 1, 1);
  188 
  189 static device_method_t acpi_toshiba_video_methods[] = {
  190         DEVMETHOD(device_probe,         acpi_toshiba_video_probe),
  191         DEVMETHOD(device_attach,        acpi_toshiba_video_attach),
  192 
  193         {0, 0}
  194 };
  195 
  196 static driver_t acpi_toshiba_video_driver = {
  197         "acpi_toshiba_video",
  198         acpi_toshiba_video_methods,
  199         0,
  200 };
  201 
  202 static devclass_t acpi_toshiba_video_devclass;
  203 DRIVER_MODULE(acpi_toshiba_video, acpi, acpi_toshiba_video_driver,
  204     acpi_toshiba_video_devclass, 0, 0);
  205 MODULE_DEPEND(acpi_toshiba_video, acpi, 1, 1, 1);
  206 
  207 static int      enable_fn_keys = 1;
  208 TUNABLE_INT("hw.acpi.toshiba.enable_fn_keys", &enable_fn_keys);
  209 
  210 /*
  211  * HID      Model
  212  * -------------------------------------
  213  * TOS6200  Libretto L Series
  214  *          Dynabook Satellite 2455
  215  *          Dynabook SS 3500
  216  * TOS6207  Dynabook SS2110 Series
  217  * TOS6208  SPA40
  218  */
  219 static int
  220 acpi_toshiba_probe(device_t dev)
  221 {
  222         static char *tosh_ids[] = { "TOS6200", "TOS6207", "TOS6208", NULL };
  223 
  224         if (acpi_disabled("toshiba") ||
  225             ACPI_ID_PROBE(device_get_parent(dev), dev, tosh_ids) == NULL ||
  226             device_get_unit(dev) != 0)
  227                 return (ENXIO);
  228 
  229         device_set_desc(dev, "Toshiba HCI Extras");
  230         return (0);
  231 }
  232 
  233 static int
  234 acpi_toshiba_attach(device_t dev)
  235 {
  236         struct          acpi_toshiba_softc *sc;
  237         struct          acpi_softc *acpi_sc;
  238         ACPI_STATUS     status;
  239         int             i;
  240 
  241         sc = device_get_softc(dev);
  242         sc->dev = dev;
  243         sc->handle = acpi_get_handle(dev);
  244 
  245         acpi_sc = acpi_device_get_parent_softc(dev);
  246         sysctl_ctx_init(&sc->sysctl_ctx);
  247         sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
  248             SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO,
  249             "toshiba", CTLFLAG_RD, 0, "");
  250 
  251         for (i = 0; sysctl_table[i].name != NULL; i++) {
  252                 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
  253                     SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
  254                     sysctl_table[i].name,
  255                     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY,
  256                     sc, i, acpi_toshiba_sysctl, "I", "");
  257         }
  258 
  259         if (enable_fn_keys != 0) {
  260                 status = AcpiEvaluateObject(sc->handle, METHOD_HCI_ENABLE,
  261                                             NULL, NULL);
  262                 if (ACPI_FAILURE(status)) {
  263                         device_printf(dev, "enable FN keys failed\n");
  264                         sysctl_ctx_free(&sc->sysctl_ctx);
  265                         return (ENXIO);
  266                 }
  267                 AcpiInstallNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
  268                                          acpi_toshiba_notify, sc);
  269         }
  270 
  271         return (0);
  272 }
  273 
  274 static int
  275 acpi_toshiba_detach(device_t dev)
  276 {
  277         struct          acpi_toshiba_softc *sc;
  278 
  279         sc = device_get_softc(dev);
  280         if (enable_fn_keys != 0) {
  281                 AcpiRemoveNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
  282                                         acpi_toshiba_notify);
  283         }
  284         sysctl_ctx_free(&sc->sysctl_ctx);
  285 
  286         return (0);
  287 }
  288 
  289 static int
  290 acpi_toshiba_sysctl(SYSCTL_HANDLER_ARGS)
  291 {
  292         struct          acpi_toshiba_softc *sc;
  293         UINT32          arg;
  294         int             function, error = 0;
  295         hci_fn_t        *handler;
  296 
  297         sc = (struct acpi_toshiba_softc *)oidp->oid_arg1;
  298         function = oidp->oid_arg2;
  299         handler = sysctl_table[function].handler;
  300 
  301         /* Get the current value from the appropriate function. */
  302         ACPI_SERIAL_BEGIN(toshiba);
  303         error = handler(sc->handle, HCI_GET, &arg);
  304         if (error != 0)
  305                 goto out;
  306 
  307         /* Send the current value to the user and return if no new value. */
  308         error = sysctl_handle_int(oidp, &arg, 0, req);
  309         if (error != 0 || req->newptr == NULL)
  310                 goto out;
  311 
  312         /* Set the new value via the appropriate function. */
  313         error = handler(sc->handle, HCI_SET, &arg);
  314 
  315 out:
  316         ACPI_SERIAL_END(toshiba);
  317         return (error);
  318 }
  319 
  320 static int
  321 hci_force_fan(ACPI_HANDLE h, int op, UINT32 *state)
  322 {
  323         int             ret;
  324 
  325         ACPI_SERIAL_ASSERT(toshiba);
  326         if (op == HCI_SET) {
  327                 if (*state < 0 || *state > 1)
  328                         return (EINVAL);
  329                 *state <<= HCI_FAN_SHIFT;
  330         }
  331         ret = hci_call(h, op, HCI_REG_FAN, state);
  332         if (ret == 0 && op == HCI_GET)
  333                 *state >>= HCI_FAN_SHIFT;
  334         return (ret);
  335 }
  336 
  337 static int
  338 hci_video_output(ACPI_HANDLE h, int op, UINT32 *video_output)
  339 {
  340         int             ret;
  341         ACPI_STATUS     status;
  342 
  343         ACPI_SERIAL_ASSERT(toshiba);
  344         if (op == HCI_SET) {
  345                 if (*video_output < 1 || *video_output > 7)
  346                         return (EINVAL);
  347                 if (h == NULL)
  348                         return (ENXIO);
  349                 *video_output |= HCI_VIDEO_OUTPUT_FLAG;
  350                 status = acpi_SetInteger(h, METHOD_VIDEO, *video_output);
  351                 if (ACPI_SUCCESS(status))
  352                         ret = 0;
  353                 else
  354                         ret = ENXIO;
  355         } else {
  356                 ret = hci_call(h, op, HCI_REG_VIDEO_OUTPUT, video_output);
  357                 if (ret == 0)
  358                         *video_output &= 0xff;
  359         }
  360 
  361         return (ret);
  362 }
  363 
  364 static int
  365 hci_lcd_brightness(ACPI_HANDLE h, int op, UINT32 *brightness)
  366 {
  367         int             ret;
  368 
  369         ACPI_SERIAL_ASSERT(toshiba);
  370         if (op == HCI_SET) {
  371                 if (*brightness < 0 || *brightness > HCI_LCD_BRIGHTNESS_MAX)
  372                         return (EINVAL);
  373                 *brightness <<= HCI_LCD_BRIGHTNESS_SHIFT;
  374         }
  375         ret = hci_call(h, op, HCI_REG_LCD_BRIGHTNESS, brightness);
  376         if (ret == 0 && op == HCI_GET)
  377                 *brightness >>= HCI_LCD_BRIGHTNESS_SHIFT;
  378         return (ret);
  379 }
  380 
  381 static int
  382 hci_lcd_backlight(ACPI_HANDLE h, int op, UINT32 *backlight)
  383 {
  384 
  385         ACPI_SERIAL_ASSERT(toshiba);
  386         if (op == HCI_SET) {
  387                 if (*backlight < 0 || *backlight > 1)
  388                         return (EINVAL);
  389         }
  390         return (hci_call(h, op, HCI_REG_LCD_BACKLIGHT, backlight));
  391 }
  392 
  393 static int
  394 hci_cpu_speed(ACPI_HANDLE h, int op, UINT32 *speed)
  395 {
  396         int             ret;
  397 
  398         ACPI_SERIAL_ASSERT(toshiba);
  399         if (op == HCI_SET) {
  400                 if (*speed < 0 || *speed > HCI_CPU_SPEED_MAX)
  401                         return (EINVAL);
  402                 *speed <<= HCI_CPU_SPEED_SHIFT;
  403         }
  404         ret = hci_call(h, op, HCI_REG_CPU_SPEED, speed);
  405         if (ret == 0 && op == HCI_GET)
  406                 *speed >>= HCI_CPU_SPEED_SHIFT;
  407         return (ret);
  408 }
  409 
  410 static int
  411 hci_call(ACPI_HANDLE h, int op, int function, UINT32 *arg)
  412 {
  413         ACPI_OBJECT_LIST args;
  414         ACPI_BUFFER     results;
  415         ACPI_OBJECT     obj[HCI_WORDS];
  416         ACPI_OBJECT     *res;
  417         int             status, i, ret;
  418 
  419         ACPI_SERIAL_ASSERT(toshiba);
  420         status = ENXIO;
  421 
  422         for (i = 0; i < HCI_WORDS; i++) {
  423                 obj[i].Type = ACPI_TYPE_INTEGER;
  424                 obj[i].Integer.Value = 0;
  425         }
  426         obj[HCI_REG_AX].Integer.Value = op;
  427         obj[HCI_REG_BX].Integer.Value = function;
  428         if (op == HCI_SET)
  429                 obj[HCI_REG_CX].Integer.Value = *arg;
  430 
  431         args.Count = HCI_WORDS;
  432         args.Pointer = obj;
  433         results.Pointer = NULL;
  434         results.Length = ACPI_ALLOCATE_BUFFER;
  435         if (ACPI_FAILURE(AcpiEvaluateObject(h, METHOD_HCI, &args, &results)))
  436                 goto end;
  437         res = (ACPI_OBJECT *)results.Pointer;
  438         if (!ACPI_PKG_VALID(res, HCI_WORDS)) {
  439                 printf("toshiba: invalid package!\n");
  440                 return (ENXIO);
  441         }
  442 
  443         acpi_PkgInt32(res, HCI_REG_AX, &ret);
  444         if (ret == HCI_SUCCESS) {
  445                 if (op == HCI_GET)
  446                         acpi_PkgInt32(res, HCI_REG_CX, arg);
  447                 status = 0;
  448         } else if (function == HCI_REG_SYSTEM_EVENT && op == HCI_GET &&
  449             ret == HCI_NOT_SUPPORTED) {
  450                 /*
  451                  * Sometimes system events are disabled without us requesting
  452                  * it.  This workaround attempts to re-enable them.
  453                  *
  454                  * XXX This call probably shouldn't be recursive.  Queueing
  455                  * a task via AcpiOsQueueForExecution() might be better.
  456                  */
  457                  i = 1;
  458                  hci_call(h, HCI_SET, HCI_REG_SYSTEM_EVENT, &i);
  459         }
  460 
  461 end:
  462         if (results.Pointer != NULL)
  463                 AcpiOsFree(results.Pointer);
  464 
  465         return (status);
  466 }
  467 
  468 /*
  469  * Perform a few actions based on the keypress.  Users can extend this
  470  * functionality by reading the keystrokes we send to devd(8).
  471  */
  472 static void
  473 hci_key_action(struct acpi_toshiba_softc *sc, ACPI_HANDLE h, UINT32 key)
  474 {
  475         UINT32          arg;
  476 
  477         ACPI_SERIAL_ASSERT(toshiba);
  478         switch (key) {
  479         case FN_F6_RELEASE:
  480                 /* Decrease LCD brightness. */
  481                 hci_lcd_brightness(h, HCI_GET, &arg);
  482                 if (arg-- == 0)
  483                         arg = 0;
  484                 else
  485                         hci_lcd_brightness(h, HCI_SET, &arg);
  486                 break;
  487         case FN_F7_RELEASE:
  488                 /* Increase LCD brightness. */
  489                 hci_lcd_brightness(h, HCI_GET, &arg);
  490                 if (arg++ == 7)
  491                         arg = 7;
  492                 else
  493                         hci_lcd_brightness(h, HCI_SET, &arg);
  494                 break;
  495         case FN_F5_RELEASE:
  496                 /* Cycle through video outputs. */
  497                 hci_video_output(h, HCI_GET, &arg);
  498                 arg = (arg + 1) % 7;
  499                 hci_video_output(sc->video_handle, HCI_SET, &arg);
  500                 break;
  501         case FN_F8_RELEASE:
  502                 /* Toggle LCD backlight. */
  503                 hci_lcd_backlight(h, HCI_GET, &arg);
  504                 arg = (arg != 0) ? 0 : 1;
  505                 hci_lcd_backlight(h, HCI_SET, &arg);
  506                 break;
  507         case FN_ESC_RELEASE:
  508                 /* Toggle forcing fan on. */
  509                 hci_force_fan(h, HCI_GET, &arg);
  510                 arg = (arg != 0) ? 0 : 1;
  511                 hci_force_fan(h, HCI_SET, &arg);
  512                 break;
  513         }
  514 }
  515 
  516 static void
  517 acpi_toshiba_notify(ACPI_HANDLE h, UINT32 notify, void *context)
  518 {
  519         struct          acpi_toshiba_softc *sc;
  520         UINT32          key;
  521 
  522         sc = (struct acpi_toshiba_softc *)context;
  523 
  524         if (notify == 0x80) {
  525                 ACPI_SERIAL_BEGIN(toshiba);
  526                 while (hci_call(h, HCI_GET, HCI_REG_SYSTEM_EVENT, &key) == 0) {
  527                         hci_key_action(sc, h, key);
  528                         acpi_UserNotify("TOSHIBA", h, (uint8_t)key);
  529                 }
  530                 ACPI_SERIAL_END(toshiba);
  531         } else
  532                 device_printf(sc->dev, "unknown notify: 0x%x\n", notify);
  533 }
  534 
  535 /*
  536  * Toshiba video pseudo-device to provide the DSSX method.
  537  *
  538  * HID      Model
  539  * -------------------------------------
  540  * TOS6201  Libretto L Series
  541  */
  542 static int
  543 acpi_toshiba_video_probe(device_t dev)
  544 {
  545         static char *vid_ids[] = { "TOS6201", NULL };
  546 
  547         if (acpi_disabled("toshiba") ||
  548             ACPI_ID_PROBE(device_get_parent(dev), dev, vid_ids) == NULL ||
  549             device_get_unit(dev) != 0)
  550                 return (ENXIO);
  551 
  552         device_quiet(dev);
  553         device_set_desc(dev, "Toshiba Video");
  554         return (0);
  555 }
  556 
  557 static int
  558 acpi_toshiba_video_attach(device_t dev)
  559 {
  560         struct          acpi_toshiba_softc *sc;
  561 
  562         sc = devclass_get_softc(acpi_toshiba_devclass, 0);
  563         if (sc == NULL)
  564                 return (ENXIO);
  565         sc->video_handle = acpi_get_handle(dev);
  566         return (0);
  567 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/acpi_support/acpi_toshiba.c

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