The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/acpi_support/acpi_panasonic.c

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    1 /*-
    2  * Copyright (c) 2003 OGAWA Takaya <t-ogawa@triaez.kaisei.org>
    3  * Copyright (c) 2004 TAKAHASHI Yoshihiro <nyan@FreeBSD.org>
    4  * All rights Reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/8.4/sys/dev/acpi_support/acpi_panasonic.c 203544 2010-02-06 12:03:25Z avg $");
   31 
   32 #include "opt_acpi.h"
   33 #include <sys/param.h>
   34 #include <sys/kernel.h>
   35 #include <sys/malloc.h>
   36 #include <sys/module.h>
   37 #include <sys/bus.h>
   38 #include <sys/power.h>
   39 
   40 #include <contrib/dev/acpica/include/acpi.h>
   41 
   42 #include <dev/acpica/acpivar.h>
   43 
   44 #define _COMPONENT      ACPI_OEM
   45 ACPI_MODULE_NAME("Panasonic")
   46 
   47 /* Debug */
   48 #undef  ACPI_PANASONIC_DEBUG
   49 
   50 /* Operations */
   51 #define HKEY_SET        0
   52 #define HKEY_GET        1
   53 
   54 /* Functions */
   55 #define HKEY_REG_LCD_BRIGHTNESS_MAX_AC  0x02
   56 #define HKEY_REG_LCD_BRIGHTNESS_MIN_AC  0x03
   57 #define HKEY_REG_LCD_BRIGHTNESS_AC      0x04
   58 #define HKEY_REG_LCD_BRIGHTNESS_MAX_DC  0x05
   59 #define HKEY_REG_LCD_BRIGHTNESS_MIN_DC  0x06
   60 #define HKEY_REG_LCD_BRIGHTNESS_DC      0x07
   61 #define HKEY_REG_SOUND_MUTE             0x08
   62 
   63 /* Field definitions */
   64 #define HKEY_LCD_BRIGHTNESS_BITS        4
   65 #define HKEY_LCD_BRIGHTNESS_DIV         ((1 << HKEY_LCD_BRIGHTNESS_BITS) - 1)
   66 
   67 struct acpi_panasonic_softc {
   68         device_t        dev;
   69         ACPI_HANDLE     handle;
   70 
   71         struct sysctl_ctx_list  sysctl_ctx;
   72         struct sysctl_oid       *sysctl_tree;
   73 
   74         eventhandler_tag        power_evh;
   75 };
   76 
   77 /* Prototype for HKEY functions for getting/setting a value. */
   78 typedef int hkey_fn_t(ACPI_HANDLE, int, UINT32 *);
   79 
   80 static int      acpi_panasonic_probe(device_t dev);
   81 static int      acpi_panasonic_attach(device_t dev);
   82 static int      acpi_panasonic_detach(device_t dev);
   83 static int      acpi_panasonic_shutdown(device_t dev);
   84 static int      acpi_panasonic_sysctl(SYSCTL_HANDLER_ARGS);
   85 static UINT64   acpi_panasonic_sinf(ACPI_HANDLE h, UINT64 index);
   86 static void     acpi_panasonic_sset(ACPI_HANDLE h, UINT64 index,
   87                     UINT64 val);
   88 static int      acpi_panasonic_hkey_event(struct acpi_panasonic_softc *sc,
   89                     ACPI_HANDLE h, UINT32 *arg);
   90 static void     acpi_panasonic_hkey_action(struct acpi_panasonic_softc *sc,
   91                     ACPI_HANDLE h, UINT32 key);
   92 static void     acpi_panasonic_notify(ACPI_HANDLE h, UINT32 notify,
   93                     void *context);
   94 static void     acpi_panasonic_power_profile(void *arg);
   95 
   96 static hkey_fn_t        hkey_lcd_brightness_max;
   97 static hkey_fn_t        hkey_lcd_brightness_min;
   98 static hkey_fn_t        hkey_lcd_brightness;
   99 static hkey_fn_t        hkey_sound_mute;
  100 ACPI_SERIAL_DECL(panasonic, "ACPI Panasonic extras");
  101 
  102 /* Table of sysctl names and HKEY functions to call. */
  103 static struct {
  104         char            *name;
  105         hkey_fn_t       *handler;
  106 } sysctl_table[] = {
  107         /* name,                handler */
  108         {"lcd_brightness_max",  hkey_lcd_brightness_max},
  109         {"lcd_brightness_min",  hkey_lcd_brightness_min},
  110         {"lcd_brightness",      hkey_lcd_brightness},
  111         {"sound_mute",          hkey_sound_mute},
  112         {NULL, NULL}
  113 };
  114 
  115 static device_method_t acpi_panasonic_methods[] = {
  116         DEVMETHOD(device_probe,         acpi_panasonic_probe),
  117         DEVMETHOD(device_attach,        acpi_panasonic_attach),
  118         DEVMETHOD(device_detach,        acpi_panasonic_detach),
  119         DEVMETHOD(device_shutdown,      acpi_panasonic_shutdown),
  120 
  121         {0, 0}
  122 };
  123 
  124 static driver_t acpi_panasonic_driver = {
  125         "acpi_panasonic",
  126         acpi_panasonic_methods,
  127         sizeof(struct acpi_panasonic_softc),
  128 };
  129 
  130 static devclass_t acpi_panasonic_devclass;
  131 
  132 DRIVER_MODULE(acpi_panasonic, acpi, acpi_panasonic_driver,
  133     acpi_panasonic_devclass, 0, 0);
  134 MODULE_DEPEND(acpi_panasonic, acpi, 1, 1, 1);
  135 
  136 static int
  137 acpi_panasonic_probe(device_t dev)
  138 {
  139         static char *mat_ids[] = { "MAT0019", NULL };
  140 
  141         if (acpi_disabled("panasonic") ||
  142             ACPI_ID_PROBE(device_get_parent(dev), dev, mat_ids) == NULL ||
  143             device_get_unit(dev) != 0)
  144                 return (ENXIO);
  145 
  146         device_set_desc(dev, "Panasonic Notebook Hotkeys");
  147         return (0);
  148 }
  149 
  150 static int
  151 acpi_panasonic_attach(device_t dev)
  152 {
  153         struct acpi_panasonic_softc *sc;
  154         struct acpi_softc *acpi_sc;
  155         ACPI_STATUS status;
  156         int i;
  157 
  158         sc = device_get_softc(dev);
  159         sc->dev = dev;
  160         sc->handle = acpi_get_handle(dev);
  161 
  162         acpi_sc = acpi_device_get_parent_softc(dev);
  163 
  164         /* Build sysctl tree */
  165         sysctl_ctx_init(&sc->sysctl_ctx);
  166         sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
  167             SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO,
  168             "panasonic", CTLFLAG_RD, 0, "");
  169         for (i = 0; sysctl_table[i].name != NULL; i++) {
  170                 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
  171                     SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
  172                     sysctl_table[i].name,
  173                     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY,
  174                     sc, i, acpi_panasonic_sysctl, "I", "");
  175         }
  176 
  177 #if 0
  178         /* Activate hotkeys */
  179         status = AcpiEvaluateObject(sc->handle, "", NULL, NULL);
  180         if (ACPI_FAILURE(status)) {
  181                 device_printf(dev, "enable FN keys failed\n");
  182                 sysctl_ctx_free(&sc->sysctl_ctx);
  183                 return (ENXIO);
  184         }
  185 #endif
  186 
  187         /* Handle notifies */
  188         status = AcpiInstallNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
  189             acpi_panasonic_notify, sc);
  190         if (ACPI_FAILURE(status)) {
  191                 device_printf(dev, "couldn't install notify handler - %s\n",
  192                     AcpiFormatException(status));
  193                 sysctl_ctx_free(&sc->sysctl_ctx);
  194                 return (ENXIO);
  195         }
  196 
  197         /* Install power profile event handler */
  198         sc->power_evh = EVENTHANDLER_REGISTER(power_profile_change,
  199             acpi_panasonic_power_profile, sc->handle, 0);
  200 
  201         return (0);
  202 }
  203 
  204 static int
  205 acpi_panasonic_detach(device_t dev)
  206 {
  207         struct acpi_panasonic_softc *sc;
  208 
  209         sc = device_get_softc(dev);
  210 
  211         /* Remove power profile event handler */
  212         EVENTHANDLER_DEREGISTER(power_profile_change, sc->power_evh);
  213 
  214         /* Remove notify handler */
  215         AcpiRemoveNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
  216             acpi_panasonic_notify);
  217 
  218         /* Free sysctl tree */
  219         sysctl_ctx_free(&sc->sysctl_ctx);
  220 
  221         return (0);
  222 }
  223 
  224 static int
  225 acpi_panasonic_shutdown(device_t dev)
  226 {
  227         struct acpi_panasonic_softc *sc;
  228         int mute;
  229 
  230         /* Mute the main audio during reboot to prevent static burst to speaker. */
  231         sc = device_get_softc(dev);
  232         mute = 1;
  233         hkey_sound_mute(sc->handle, HKEY_SET, &mute);
  234         return (0);
  235 }
  236 
  237 static int
  238 acpi_panasonic_sysctl(SYSCTL_HANDLER_ARGS)
  239 {
  240         struct acpi_panasonic_softc *sc;
  241         UINT32 arg;
  242         int function, error;
  243         hkey_fn_t *handler;
  244 
  245         sc = (struct acpi_panasonic_softc *)oidp->oid_arg1;
  246         function = oidp->oid_arg2;
  247         handler = sysctl_table[function].handler;
  248 
  249         /* Get the current value from the appropriate function. */
  250         ACPI_SERIAL_BEGIN(panasonic);
  251         error = handler(sc->handle, HKEY_GET, &arg);
  252         if (error != 0)
  253                 goto out;
  254 
  255         /* Send the current value to the user and return if no new value. */
  256         error = sysctl_handle_int(oidp, &arg, 0, req);
  257         if (error != 0 || req->newptr == NULL)
  258                 goto out;
  259 
  260         /* Set the new value via the appropriate function. */
  261         error = handler(sc->handle, HKEY_SET, &arg);
  262 
  263 out:
  264         ACPI_SERIAL_END(panasonic);
  265         return (error);
  266 }
  267 
  268 static UINT64
  269 acpi_panasonic_sinf(ACPI_HANDLE h, UINT64 index)
  270 {
  271         ACPI_BUFFER buf;
  272         ACPI_OBJECT *res;
  273         UINT64 ret;
  274 
  275         ACPI_SERIAL_ASSERT(panasonic);
  276         ret = -1;
  277         buf.Length = ACPI_ALLOCATE_BUFFER;
  278         buf.Pointer = NULL;
  279         AcpiEvaluateObject(h, "SINF", NULL, &buf);
  280         res = (ACPI_OBJECT *)buf.Pointer;
  281         if (res->Type == ACPI_TYPE_PACKAGE)
  282                 ret = res->Package.Elements[index].Integer.Value;
  283         AcpiOsFree(buf.Pointer);
  284 
  285         return (ret);
  286 }
  287 
  288 static void
  289 acpi_panasonic_sset(ACPI_HANDLE h, UINT64 index, UINT64 val)
  290 {
  291         ACPI_OBJECT_LIST args;
  292         ACPI_OBJECT obj[2];
  293 
  294         ACPI_SERIAL_ASSERT(panasonic);
  295         obj[0].Type = ACPI_TYPE_INTEGER;
  296         obj[0].Integer.Value = index;
  297         obj[1].Type = ACPI_TYPE_INTEGER;
  298         obj[1].Integer.Value = val;
  299         args.Count = 2;
  300         args.Pointer = obj;
  301         AcpiEvaluateObject(h, "SSET", &args, NULL);
  302 }
  303 
  304 static int
  305 hkey_lcd_brightness_max(ACPI_HANDLE h, int op, UINT32 *val)
  306 {
  307         int reg;
  308 
  309         ACPI_SERIAL_ASSERT(panasonic);
  310         reg = (power_profile_get_state() == POWER_PROFILE_PERFORMANCE) ?
  311             HKEY_REG_LCD_BRIGHTNESS_MAX_AC : HKEY_REG_LCD_BRIGHTNESS_MAX_DC;
  312 
  313         switch (op) {
  314         case HKEY_SET:
  315                 return (EPERM);
  316                 break;
  317         case HKEY_GET:
  318                 *val = acpi_panasonic_sinf(h, reg);
  319                 break;
  320         }
  321 
  322         return (0);
  323 }
  324 
  325 static int
  326 hkey_lcd_brightness_min(ACPI_HANDLE h, int op, UINT32 *val)
  327 {
  328         int reg;
  329 
  330         ACPI_SERIAL_ASSERT(panasonic);
  331         reg = (power_profile_get_state() == POWER_PROFILE_PERFORMANCE) ?
  332             HKEY_REG_LCD_BRIGHTNESS_MIN_AC : HKEY_REG_LCD_BRIGHTNESS_MIN_DC;
  333 
  334         switch (op) {
  335         case HKEY_SET:
  336                 return (EPERM);
  337                 break;
  338         case HKEY_GET:
  339                 *val = acpi_panasonic_sinf(h, reg);
  340                 break;
  341         }
  342 
  343         return (0);
  344 }
  345 
  346 static int
  347 hkey_lcd_brightness(ACPI_HANDLE h, int op, UINT32 *val)
  348 {
  349         int reg;
  350         UINT32 max, min;
  351 
  352         reg = (power_profile_get_state() == POWER_PROFILE_PERFORMANCE) ?
  353             HKEY_REG_LCD_BRIGHTNESS_AC : HKEY_REG_LCD_BRIGHTNESS_DC;
  354 
  355         ACPI_SERIAL_ASSERT(panasonic);
  356         switch (op) {
  357         case HKEY_SET:
  358                 hkey_lcd_brightness_max(h, HKEY_GET, &max);
  359                 hkey_lcd_brightness_min(h, HKEY_GET, &min);
  360                 if (*val < min || *val > max)
  361                         return (EINVAL);
  362                 acpi_panasonic_sset(h, reg, *val);
  363                 break;
  364         case HKEY_GET:
  365                 *val = acpi_panasonic_sinf(h, reg);
  366                 break;
  367         }
  368 
  369         return (0);
  370 }
  371 
  372 static int
  373 hkey_sound_mute(ACPI_HANDLE h, int op, UINT32 *val)
  374 {
  375 
  376         ACPI_SERIAL_ASSERT(panasonic);
  377         switch (op) {
  378         case HKEY_SET:
  379                 if (*val != 0 && *val != 1)
  380                         return (EINVAL);
  381                 acpi_panasonic_sset(h, HKEY_REG_SOUND_MUTE, *val);
  382                 break;
  383         case HKEY_GET:
  384                 *val = acpi_panasonic_sinf(h, HKEY_REG_SOUND_MUTE);
  385                 break;
  386         }
  387 
  388         return (0);
  389 }
  390 
  391 static int
  392 acpi_panasonic_hkey_event(struct acpi_panasonic_softc *sc, ACPI_HANDLE h,
  393     UINT32 *arg)
  394 {
  395         ACPI_BUFFER buf;
  396         ACPI_OBJECT *res;
  397         UINT64 val;
  398         int status;
  399 
  400         ACPI_SERIAL_ASSERT(panasonic);
  401         status = ENXIO;
  402 
  403         buf.Length = ACPI_ALLOCATE_BUFFER;
  404         buf.Pointer = NULL;
  405         AcpiEvaluateObject(h, "HINF", NULL, &buf);
  406         res = (ACPI_OBJECT *)buf.Pointer;
  407         if (res->Type != ACPI_TYPE_INTEGER) {
  408                 device_printf(sc->dev, "HINF returned non-integer\n");
  409                 goto end;
  410         }
  411         val = res->Integer.Value;
  412 #ifdef ACPI_PANASONIC_DEBUG
  413         device_printf(sc->dev, "%s button Fn+F%d\n",
  414                       (val & 0x80) ? "Pressed" : "Released",
  415                       (int)(val & 0x7f));
  416 #endif
  417         if ((val & 0x7f) > 0 && (val & 0x7f) < 11) {
  418                 *arg = val;
  419                 status = 0;
  420         }
  421 end:
  422         if (buf.Pointer)
  423                 AcpiOsFree(buf.Pointer);
  424 
  425         return (status);
  426 }
  427 
  428 static void
  429 acpi_panasonic_hkey_action(struct acpi_panasonic_softc *sc, ACPI_HANDLE h,
  430     UINT32 key)
  431 {
  432         struct acpi_softc *acpi_sc;
  433         int arg, max, min;
  434 
  435         acpi_sc = acpi_device_get_parent_softc(sc->dev);
  436 
  437         ACPI_SERIAL_ASSERT(panasonic);
  438         switch (key) {
  439         case 1:
  440                 /* Decrease LCD brightness. */
  441                 hkey_lcd_brightness_max(h, HKEY_GET, &max);
  442                 hkey_lcd_brightness_min(h, HKEY_GET, &min);
  443                 hkey_lcd_brightness(h, HKEY_GET, &arg);
  444                 arg -= max / HKEY_LCD_BRIGHTNESS_DIV;
  445                 if (arg < min)
  446                         arg = min;
  447                 else if (arg > max)
  448                         arg = max;
  449                 hkey_lcd_brightness(h, HKEY_SET, &arg);
  450                 break;
  451         case 2:
  452                 /* Increase LCD brightness. */
  453                 hkey_lcd_brightness_max(h, HKEY_GET, &max);
  454                 hkey_lcd_brightness_min(h, HKEY_GET, &min);
  455                 hkey_lcd_brightness(h, HKEY_GET, &arg);
  456                 arg += max / HKEY_LCD_BRIGHTNESS_DIV;
  457                 if (arg < min)
  458                         arg = min;
  459                 else if (arg > max)
  460                         arg = max;
  461                 hkey_lcd_brightness(h, HKEY_SET, &arg);
  462                 break;
  463         case 4:
  464                 /* Toggle sound mute. */
  465                 hkey_sound_mute(h, HKEY_GET, &arg);
  466                 if (arg)
  467                         arg = 0;
  468                 else
  469                         arg = 1;
  470                 hkey_sound_mute(h, HKEY_SET, &arg);
  471                 break;
  472         case 7:
  473                 /* Suspend. */
  474                 acpi_event_sleep_button_sleep(acpi_sc);
  475                 break;
  476         }
  477 }
  478 
  479 static void
  480 acpi_panasonic_notify(ACPI_HANDLE h, UINT32 notify, void *context)
  481 {
  482         struct acpi_panasonic_softc *sc;
  483         UINT32 key = 0;
  484 
  485         sc = (struct acpi_panasonic_softc *)context;
  486 
  487         switch (notify) {
  488         case 0x80:
  489                 ACPI_SERIAL_BEGIN(panasonic);
  490                 if (acpi_panasonic_hkey_event(sc, h, &key) == 0) {
  491                         acpi_panasonic_hkey_action(sc, h, key);
  492                         acpi_UserNotify("Panasonic", h, (uint8_t)key);
  493                 }
  494                 ACPI_SERIAL_END(panasonic);
  495                 break;
  496         default:
  497                 device_printf(sc->dev, "unknown notify: %#x\n", notify);
  498                 break;
  499         }
  500 }
  501 
  502 static void
  503 acpi_panasonic_power_profile(void *arg)
  504 {
  505         ACPI_HANDLE handle;
  506         UINT32 brightness;
  507 
  508         handle = (ACPI_HANDLE)arg;
  509 
  510         /* Reset current brightness according to new power state. */
  511         ACPI_SERIAL_BEGIN(panasonic);
  512         hkey_lcd_brightness(handle, HKEY_GET, &brightness);
  513         hkey_lcd_brightness(handle, HKEY_SET, &brightness);
  514         ACPI_SERIAL_END(panasonic);
  515 }

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