Line data    Source code

       1             : /* $OpenBSD: acpicbkbd.c,v 1.2 2016/07/27 02:26:26 jcs Exp $ */
       2             : /*
       3             :  * Copyright (c) 2016 joshua stein <jcs@openbsd.org>
       4             :  *
       5             :  * Permission to use, copy, modify, and/or distribute this software for any
       6             :  * purpose with or without fee is hereby granted, provided that the above
       7             :  * copyright notice and this permission notice appear in all copies.
       8             :  *
       9             :  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
      10             :  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
      11             :  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
      12             :  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
      13             :  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
      14             :  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
      15             :  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
      16             :  */
      17             : 
      18             : #include <sys/param.h>
      19             : #include <sys/systm.h>
      20             : 
      21             : #include <dev/acpi/acpivar.h>
      22             : #include <dev/acpi/amltypes.h>
      23             : #include <dev/acpi/dsdt.h>
      24             : 
      25             : #include <dev/wscons/wsconsio.h>
      26             : 
      27             : /* #define ACPICBKBD_DEBUG */
      28             : 
      29             : #ifdef ACPICBKBD_DEBUG
      30             : #define DPRINTF(x)      printf x
      31             : #else
      32             : #define DPRINTF(x)
      33             : #endif
      34             : 
      35             : #define ACPICBKBD_MAX_BACKLIGHT 100
      36             : 
      37             : struct acpicbkbd_softc {
      38             :         struct device           sc_dev;
      39             :         struct acpi_softc       *sc_acpi;
      40             :         struct aml_node         *sc_devnode;
      41             : 
      42             :         uint64_t                sc_backlight;
      43             : };
      44             : 
      45             : int     acpicbkbd_match(struct device *, void *, void *);
      46             : void    acpicbkbd_attach(struct device *, struct device *, void *);
      47             : int     acpicbkbd_activate(struct device *, int);
      48             : 
      49             : int     acpicbkbd_get_backlight(struct wskbd_backlight *);
      50             : int     acpicbkbd_set_backlight(struct wskbd_backlight *);
      51             : void    acpicbkbd_write_backlight(void *, int);
      52             : extern int (*wskbd_get_backlight)(struct wskbd_backlight *);
      53             : extern int (*wskbd_set_backlight)(struct wskbd_backlight *);
      54             : 
      55             : struct cfattach acpicbkbd_ca = {
      56             :         sizeof(struct acpicbkbd_softc),
      57             :         acpicbkbd_match,
      58             :         acpicbkbd_attach,
      59             :         NULL,
      60             :         acpicbkbd_activate,
      61             : };
      62             : 
      63             : struct cfdriver acpicbkbd_cd = {
      64             :         NULL, "acpicbkbd", DV_DULL
      65             : };
      66             : 
      67             : const char *acpicbkbd_hids[] = {
      68             :         "GOOG0002",
      69             :         NULL
      70             : };
      71             : 
      72             : int
      73           0 : acpicbkbd_match(struct device *parent, void *match, void *aux)
      74             : {
      75           0 :         struct acpi_attach_args *aaa = aux;
      76           0 :         struct cfdata *cf = match;
      77             : 
      78           0 :         return acpi_matchhids(aaa, acpicbkbd_hids, cf->cf_driver->cd_name);
      79             : }
      80             : 
      81             : void
      82           0 : acpicbkbd_attach(struct device *parent, struct device *self, void *aux)
      83             : {
      84           0 :         struct acpicbkbd_softc  *sc = (struct acpicbkbd_softc *)self;
      85           0 :         struct acpi_attach_args *aa = aux;
      86             : 
      87           0 :         sc->sc_acpi = (struct acpi_softc *)parent;
      88           0 :         sc->sc_devnode = aa->aaa_node;
      89             : 
      90           0 :         printf(": %s", sc->sc_devnode->name);
      91             : 
      92           0 :         if (aml_evalinteger(sc->sc_acpi, sc->sc_devnode, "KBQC",
      93           0 :             0, NULL, &sc->sc_backlight) == 0) {
      94           0 :                 wskbd_get_backlight = acpicbkbd_get_backlight;
      95           0 :                 wskbd_set_backlight = acpicbkbd_set_backlight;
      96           0 :         } else
      97           0 :                 printf(", no backlight control");
      98             : 
      99           0 :         printf("\n");
     100           0 : }
     101             : 
     102             : int
     103           0 : acpicbkbd_activate(struct device *self, int act)
     104             : {
     105           0 :         struct acpicbkbd_softc  *sc = (struct acpicbkbd_softc *)self;
     106             : 
     107           0 :         switch (act) {
     108             :         case DVACT_WAKEUP:
     109             :                 /* restore backlight to pre-suspend value */
     110           0 :                 acpi_addtask(sc->sc_acpi, acpicbkbd_write_backlight, sc, 0);
     111             : 
     112           0 :                 break;
     113             :         }
     114           0 :         return (0);
     115             : }
     116             : 
     117             : int
     118           0 : acpicbkbd_get_backlight(struct wskbd_backlight *kbl)
     119             : {
     120           0 :         struct acpicbkbd_softc *sc = acpicbkbd_cd.cd_devs[0];
     121             : 
     122           0 :         KASSERT(sc != NULL);
     123             : 
     124           0 :         kbl->min = 0;
     125           0 :         kbl->max = ACPICBKBD_MAX_BACKLIGHT;
     126           0 :         kbl->curval = sc->sc_backlight;
     127             : 
     128           0 :         return 0;
     129             : }
     130             : 
     131             : int
     132           0 : acpicbkbd_set_backlight(struct wskbd_backlight *kbl)
     133             : {
     134           0 :         struct acpicbkbd_softc *sc = acpicbkbd_cd.cd_devs[0];
     135             : 
     136           0 :         KASSERT(sc != NULL);
     137             : 
     138           0 :         if (kbl->curval > ACPICBKBD_MAX_BACKLIGHT)
     139           0 :                 return EINVAL;
     140             : 
     141           0 :         sc->sc_backlight = kbl->curval;
     142             : 
     143           0 :         acpi_addtask(sc->sc_acpi, acpicbkbd_write_backlight, sc, 0);
     144           0 :         acpi_wakeup(sc->sc_acpi);
     145             : 
     146           0 :         return 0;
     147           0 : }
     148             : 
     149             : void
     150           0 : acpicbkbd_write_backlight(void *arg0, int arg1)
     151             : {
     152           0 :         struct acpicbkbd_softc *sc = arg0;
     153           0 :         struct aml_value arg;
     154             : 
     155             :         DPRINTF(("%s: writing backlight of %lld\n", sc->sc_dev.dv_xname,
     156             :             sc->sc_backlight));
     157             : 
     158           0 :         memset(&arg, 0, sizeof(arg));
     159           0 :         arg.type = AML_OBJTYPE_INTEGER;
     160           0 :         arg.v_integer = sc->sc_backlight;
     161           0 :         aml_evalname(sc->sc_acpi, sc->sc_devnode, "KBCM", 1, &arg, NULL);
     162           0 : }