acpi_panasonic.c

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    1 /*-
    2  * Copyright (c) 2003 OGAWA Takaya <t-ogawa@triaez.kaisei.org>
    3  * Copyright (c) 2004 Yoshihiro TAKAHASHI <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: src/sys/i386/acpica/acpi_panasonic.c,v 1.3.2.2 2004/12/27 05:54:13 njl Exp $");
   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 
   39 #include "acpi.h"
   40 #include <dev/acpica/acpivar.h>
   41 
   42 #define _COMPONENT      ACPI_OEM
   43 ACPI_MODULE_NAME("Panasonic")
   44 
   45 /* Debug */
   46 #undef  ACPI_PANASONIC_DEBUG
   47 
   48 /* Operations */
   49 #define HKEY_SET        0
   50 #define HKEY_GET        1
   51 
   52 /* Functions */
   53 #define HKEY_REG_LCD_BRIGHTNESS         0x04
   54 #define HKEY_REG_SOUND_MUTE             0x08
   55 
   56 /* Field definitions */
   57 #define HKEY_LCD_BRIGHTNESS_BITS        4
   58 #define HKEY_LCD_BRIGHTNESS_DIV         ((1 << HKEY_LCD_BRIGHTNESS_BITS) - 1)
   59 
   60 struct acpi_panasonic_softc {
   61         device_t        dev;
   62         ACPI_HANDLE     handle;
   63 
   64         struct sysctl_ctx_list  sysctl_ctx;
   65         struct sysctl_oid       *sysctl_tree;
   66 };
   67 
   68 /* Prototype for HKEY functions for getting/setting a value. */
   69 typedef int hkey_fn_t(ACPI_HANDLE, int, UINT32 *);
   70 
   71 static int      acpi_panasonic_probe(device_t dev);
   72 static int      acpi_panasonic_attach(device_t dev);
   73 static int      acpi_panasonic_detach(device_t dev);
   74 static int      acpi_panasonic_sysctl(SYSCTL_HANDLER_ARGS);
   75 static ACPI_INTEGER acpi_panasonic_sinf(ACPI_HANDLE h, ACPI_INTEGER index);
   76 static void     acpi_panasonic_sset(ACPI_HANDLE h, ACPI_INTEGER index,
   77                     ACPI_INTEGER val);
   78 static int      acpi_panasonic_hkey_event(struct acpi_panasonic_softc *sc,
   79                     ACPI_HANDLE h, UINT32 *arg);
   80 static void     acpi_panasonic_hkey_action(struct acpi_panasonic_softc *sc,
   81                     ACPI_HANDLE h, UINT32 key);
   82 static void     acpi_panasonic_notify(ACPI_HANDLE h, UINT32 notify,
   83                     void *context);
   84 
   85 static hkey_fn_t        hkey_lcd_brightness_max;
   86 static hkey_fn_t        hkey_lcd_brightness;
   87 static hkey_fn_t        hkey_sound_mute;
   88 static int              lcd_brightness_max = 255;
   89 ACPI_SERIAL_DECL(panasonic, "ACPI Panasonic extras");
   90 
   91 /* Table of sysctl names and HKEY functions to call. */
   92 static struct {
   93         char            *name;
   94         hkey_fn_t       *handler;
   95 } sysctl_table[] = {
   96         /* name,                handler */
   97         {"lcd_brightness_max",  hkey_lcd_brightness_max},
   98         {"lcd_brightness",      hkey_lcd_brightness},
   99         {"sound_mute",          hkey_sound_mute},
  100         {NULL, NULL}
  101 };
  102 
  103 static device_method_t acpi_panasonic_methods[] = {
  104         DEVMETHOD(device_probe,         acpi_panasonic_probe),
  105         DEVMETHOD(device_attach,        acpi_panasonic_attach),
  106         DEVMETHOD(device_detach,        acpi_panasonic_detach),
  107 
  108         {0, 0}
  109 };
  110 
  111 static driver_t acpi_panasonic_driver = {
  112         "acpi_panasonic",
  113         acpi_panasonic_methods,
  114         sizeof(struct acpi_panasonic_softc),
  115 };
  116 
  117 static devclass_t acpi_panasonic_devclass;
  118 
  119 DRIVER_MODULE(acpi_panasonic, acpi, acpi_panasonic_driver,
  120     acpi_panasonic_devclass, 0, 0);
  121 MODULE_DEPEND(acpi_panasonic, acpi, 1, 1, 1);
  122 
  123 static int
  124 acpi_panasonic_probe(device_t dev)
  125 {
  126         static char *mat_ids[] = { "MAT0019", NULL };
  127 
  128         if (acpi_disabled("panasonic") ||
  129             ACPI_ID_PROBE(device_get_parent(dev), dev, mat_ids) == NULL ||
  130             device_get_unit(dev) != 0)
  131                 return (ENXIO);
  132 
  133         device_set_desc(dev, "Panasonic Notebook Hotkeys");
  134         return (0);
  135 }
  136 
  137 static int
  138 acpi_panasonic_attach(device_t dev)
  139 {
  140         struct acpi_panasonic_softc *sc;
  141         struct acpi_softc *acpi_sc;
  142         ACPI_STATUS status;
  143         int i;
  144 
  145         sc = device_get_softc(dev);
  146         sc->dev = dev;
  147         sc->handle = acpi_get_handle(dev);
  148 
  149         acpi_sc = acpi_device_get_parent_softc(dev);
  150 
  151         /* Build sysctl tree */
  152         sysctl_ctx_init(&sc->sysctl_ctx);
  153         sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
  154             SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO,
  155             "panasonic", CTLFLAG_RD, 0, "");
  156         for (i = 0; sysctl_table[i].name != NULL; i++) {
  157                 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
  158                     SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
  159                     sysctl_table[i].name,
  160                     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY,
  161                     sc, i, acpi_panasonic_sysctl, "I", "");
  162         }
  163 
  164 #if 0
  165         /* Activate hotkeys */
  166         status = AcpiEvaluateObject(sc->handle, "", NULL, NULL);
  167         if (ACPI_FAILURE(status)) {
  168                 device_printf(dev, "enable FN keys failed\n");
  169                 sysctl_ctx_free(&sc->sysctl_ctx);
  170                 return (ENXIO);
  171         }
  172 #endif
  173 
  174         /* Handle notifies */
  175         status = AcpiInstallNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
  176             acpi_panasonic_notify, sc);
  177         if (ACPI_FAILURE(status)) {
  178                 device_printf(dev, "couldn't install notify handler - %s\n",
  179                     AcpiFormatException(status));
  180                 sysctl_ctx_free(&sc->sysctl_ctx);
  181                 return (ENXIO);
  182         }
  183 
  184         return (0);
  185 }
  186 
  187 static int
  188 acpi_panasonic_detach(device_t dev)
  189 {
  190         struct acpi_panasonic_softc *sc;
  191 
  192         sc = device_get_softc(dev);
  193 
  194         /* Remove notify handler */
  195         AcpiRemoveNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
  196             acpi_panasonic_notify);
  197 
  198         /* Free sysctl tree */
  199         sysctl_ctx_free(&sc->sysctl_ctx);
  200 
  201         return (0);
  202 }
  203 
  204 static int
  205 acpi_panasonic_sysctl(SYSCTL_HANDLER_ARGS)
  206 {
  207         struct acpi_panasonic_softc *sc;
  208         UINT32 arg;
  209         int function, error;
  210         hkey_fn_t *handler;
  211 
  212         sc = (struct acpi_panasonic_softc *)oidp->oid_arg1;
  213         function = oidp->oid_arg2;
  214         handler = sysctl_table[function].handler;
  215 
  216         /* Get the current value from the appropriate function. */
  217         ACPI_SERIAL_BEGIN(panasonic);
  218         error = handler(sc->handle, HKEY_GET, &arg);
  219         if (error != 0)
  220                 goto out;
  221 
  222         /* Send the current value to the user and return if no new value. */
  223         error = sysctl_handle_int(oidp, &arg, 0, req);
  224         if (error != 0 || req->newptr == NULL)
  225                 goto out;
  226 
  227         /* Set the new value via the appropriate function. */
  228         error = handler(sc->handle, HKEY_SET, &arg);
  229 
  230 out:
  231         ACPI_SERIAL_END(panasonic);
  232         return (error);
  233 }
  234 
  235 static ACPI_INTEGER
  236 acpi_panasonic_sinf(ACPI_HANDLE h, ACPI_INTEGER index)
  237 {
  238         ACPI_BUFFER buf;
  239         ACPI_OBJECT *res;
  240         ACPI_INTEGER ret;
  241 
  242         ACPI_SERIAL_ASSERT(panasonic);
  243         ret = -1;
  244         buf.Length = ACPI_ALLOCATE_BUFFER;
  245         buf.Pointer = NULL;
  246         AcpiEvaluateObject(h, "SINF", NULL, &buf);
  247         res = (ACPI_OBJECT *)buf.Pointer;
  248         if (res->Type == ACPI_TYPE_PACKAGE)
  249                 ret = res->Package.Elements[index].Integer.Value;
  250         AcpiOsFree(buf.Pointer);
  251 
  252         return (ret);
  253 }
  254 
  255 static void
  256 acpi_panasonic_sset(ACPI_HANDLE h, ACPI_INTEGER index, ACPI_INTEGER val)
  257 {
  258         ACPI_OBJECT_LIST args;
  259         ACPI_OBJECT obj[2];
  260 
  261         ACPI_SERIAL_ASSERT(panasonic);
  262         obj[0].Type = ACPI_TYPE_INTEGER;
  263         obj[0].Integer.Value = index;
  264         obj[1].Type = ACPI_TYPE_INTEGER;
  265         obj[1].Integer.Value = val;
  266         args.Count = 2;
  267         args.Pointer = obj;
  268         AcpiEvaluateObject(h, "SSET", &args, NULL);
  269 }
  270 
  271 static int
  272 hkey_lcd_brightness_max(ACPI_HANDLE h, int op, UINT32 *val)
  273 {
  274 
  275         ACPI_SERIAL_ASSERT(panasonic);
  276         switch (op) {
  277         case HKEY_SET:
  278                 if (*val < 0 || *val > 255)
  279                         return (EINVAL);
  280                 lcd_brightness_max = *val;
  281                 break;
  282         case HKEY_GET:
  283                 *val = lcd_brightness_max;
  284                 break;
  285         }
  286 
  287         return (0);
  288 }
  289 
  290 static int
  291 hkey_lcd_brightness(ACPI_HANDLE h, int op, UINT32 *val)
  292 {
  293 
  294         ACPI_SERIAL_ASSERT(panasonic);
  295         switch (op) {
  296         case HKEY_SET:
  297                 if (*val < 0 || *val > lcd_brightness_max)
  298                         return (EINVAL);
  299                 acpi_panasonic_sset(h, HKEY_REG_LCD_BRIGHTNESS, *val);
  300                 break;
  301         case HKEY_GET:
  302                 *val = acpi_panasonic_sinf(h, HKEY_REG_LCD_BRIGHTNESS);
  303                 break;
  304         }
  305 
  306         return (0);
  307 }
  308 
  309 static int
  310 hkey_sound_mute(ACPI_HANDLE h, int op, UINT32 *val)
  311 {
  312 
  313         ACPI_SERIAL_ASSERT(panasonic);
  314         switch (op) {
  315         case HKEY_SET:
  316                 if (*val != 0 && *val != 1)
  317                         return (EINVAL);
  318                 acpi_panasonic_sset(h, HKEY_REG_SOUND_MUTE, *val);
  319                 break;
  320         case HKEY_GET:
  321                 *val = acpi_panasonic_sinf(h, HKEY_REG_SOUND_MUTE);
  322                 break;
  323         }
  324 
  325         return (0);
  326 }
  327 
  328 static int
  329 acpi_panasonic_hkey_event(struct acpi_panasonic_softc *sc, ACPI_HANDLE h,
  330     UINT32 *arg)
  331 {
  332         ACPI_BUFFER buf;
  333         ACPI_OBJECT *res;
  334         ACPI_INTEGER val;
  335         int status;
  336 
  337         ACPI_SERIAL_ASSERT(panasonic);
  338         status = ENXIO;
  339 
  340         buf.Length = ACPI_ALLOCATE_BUFFER;
  341         buf.Pointer = NULL;
  342         AcpiEvaluateObject(h, "HINF", NULL, &buf);
  343         res = (ACPI_OBJECT *)buf.Pointer;
  344         if (res->Type != ACPI_TYPE_INTEGER) {
  345                 device_printf(sc->dev, "HINF returned non-integer\n");
  346                 goto end;
  347         }
  348         val = res->Integer.Value;
  349 #ifdef ACPI_PANASONIC_DEBUG
  350         device_printf(sc->dev, "%s button Fn+F%d\n",
  351                       (val & 0x80) ? "Pressed" : "Released",
  352                       (int)(val & 0x7f));
  353 #endif
  354         if ((val & 0x7f) > 0 && (val & 0x7f) < 11) {
  355                 *arg = val;
  356                 status = 0;
  357         }
  358 end:
  359         if (buf.Pointer)
  360                 AcpiOsFree(buf.Pointer);
  361 
  362         return (status);
  363 }
  364 
  365 static void
  366 acpi_panasonic_hkey_action(struct acpi_panasonic_softc *sc, ACPI_HANDLE h,
  367     UINT32 key)
  368 {
  369         int arg;
  370 
  371         ACPI_SERIAL_ASSERT(panasonic);
  372         switch (key) {
  373         case 1:
  374                 /* Decrease LCD brightness. */
  375                 hkey_lcd_brightness(h, HKEY_GET, &arg);
  376                 arg -= lcd_brightness_max / HKEY_LCD_BRIGHTNESS_DIV;
  377                 if (arg < 0)
  378                         arg = 0;
  379                 else if (arg > lcd_brightness_max)
  380                         arg = lcd_brightness_max;
  381                 hkey_lcd_brightness(h, HKEY_SET, &arg);
  382                 break;
  383         case 2:
  384                 /* Increase LCD brightness. */
  385                 hkey_lcd_brightness(h, HKEY_GET, &arg);
  386                 arg += lcd_brightness_max / HKEY_LCD_BRIGHTNESS_DIV;
  387                 if (arg < 0)
  388                         arg = 0;
  389                 else if (arg > lcd_brightness_max)
  390                         arg = lcd_brightness_max;
  391                 hkey_lcd_brightness(h, HKEY_SET, &arg);
  392                 break;
  393         case 4:
  394                 /* Toggle sound mute. */
  395                 hkey_sound_mute(h, HKEY_GET, &arg);
  396                 if (arg)
  397                         arg = 0;
  398                 else
  399                         arg = 1;
  400                 hkey_sound_mute(h, HKEY_SET, &arg);
  401                 break;
  402         }
  403 }
  404 
  405 static void
  406 acpi_panasonic_notify(ACPI_HANDLE h, UINT32 notify, void *context)
  407 {
  408         struct acpi_panasonic_softc *sc;
  409         UINT32 key;
  410 
  411         sc = (struct acpi_panasonic_softc *)context;
  412 
  413         switch (notify) {
  414         case 0x80:
  415                 ACPI_SERIAL_BEGIN(panasonic);
  416                 if (acpi_panasonic_hkey_event(sc, h, &key) == 0) {
  417                         acpi_panasonic_hkey_action(sc, h, key);
  418                         acpi_UserNotify("Panasonic", h, (uint8_t)key);
  419                 }
  420                 ACPI_SERIAL_END(panasonic);
  421                 break;
  422         default:
  423                 device_printf(sc->dev, "unknown notify: %#x\n", notify);
  424                 break;
  425         }
  426 }
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FreeBSD/Linux Kernel Cross Reference sys/i386/acpica/acpi_panasonic.c

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