/*      $NetBSD: acpi_lid.c,v 1.45 2021/01/29 15:49:55 thorpej Exp $    */

/*
* Copyright 2001, 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed for the NetBSD Project by
*      Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
*    or promote products derived from this software without specific prior
*    written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

/*
* ACPI Lid Switch driver.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi_lid.c,v 1.45 2021/01/29 15:49:55 thorpej Exp $");

#include <sys/param.h>
#include <sys/device.h>
#include <sys/module.h>
#include <sys/systm.h>

#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>

#define _COMPONENT               ACPI_LID_COMPONENT
ACPI_MODULE_NAME                 ("acpi_lid")

#define ACPI_NOTIFY_LID          0x80

struct acpilid_softc {
       struct acpi_devnode     *sc_node;
       struct sysmon_pswitch    sc_smpsw;
       uint64_t                 sc_status;
};

static const struct device_compatible_entry compat_data[] = {
       { .compat = "PNP0C0D" },
       DEVICE_COMPAT_EOL
};

static int      acpilid_match(device_t, cfdata_t, void *);
static void     acpilid_attach(device_t, device_t, void *);
static int      acpilid_detach(device_t, int);
static void     acpilid_status_changed(void *);
static void     acpilid_notify_handler(ACPI_HANDLE, uint32_t, void *);

CFATTACH_DECL_NEW(acpilid, sizeof(struct acpilid_softc),
   acpilid_match, acpilid_attach, acpilid_detach, NULL);

/*
* acpilid_match:
*
*      Autoconfiguration `match' routine.
*/
static int
acpilid_match(device_t parent, cfdata_t match, void *aux)
{
       struct acpi_attach_args *aa = aux;

       return acpi_compatible_match(aa, compat_data);
}

/*
* acpilid_attach:
*
*      Autoconfiguration `attach' routine.
*/
static void
acpilid_attach(device_t parent, device_t self, void *aux)
{
       struct acpilid_softc *sc = device_private(self);
       struct acpi_attach_args *aa = aux;

       aprint_naive(": ACPI Lid Switch\n");
       aprint_normal(": ACPI Lid Switch\n");

       sc->sc_node = aa->aa_node;

       sc->sc_smpsw.smpsw_name = device_xname(self);
       sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID;

       (void)pmf_device_register(self, NULL, NULL);
       (void)sysmon_pswitch_register(&sc->sc_smpsw);
       (void)acpi_register_notify(sc->sc_node, acpilid_notify_handler);
}

static int
acpilid_detach(device_t self, int flags)
{
       struct acpilid_softc *sc = device_private(self);

       pmf_device_deregister(self);
       acpi_deregister_notify(sc->sc_node);
       sysmon_pswitch_unregister(&sc->sc_smpsw);

       return 0;
}

/*
* acpilid_status_changed:
*
*      Get, and possibly display, the lid status, and take action.
*/
static void
acpilid_status_changed(void *arg)
{
       device_t dv = arg;
       struct acpilid_softc *sc = device_private(dv);
       ACPI_STATUS rv;

       rv = acpi_eval_integer(sc->sc_node->ad_handle, "_LID", &sc->sc_status);

       if (ACPI_FAILURE(rv))
               return;

       sysmon_pswitch_event(&sc->sc_smpsw, (sc->sc_status == 0) ?
           PSWITCH_EVENT_PRESSED : PSWITCH_EVENT_RELEASED);
}

/*
* acpilid_notify_handler:
*
*      Callback from ACPI interrupt handler to notify us of an event.
*/
static void
acpilid_notify_handler(ACPI_HANDLE handle, uint32_t notify, void *context)
{
       static const int handler = OSL_NOTIFY_HANDLER;
       device_t dv = context;

       switch (notify) {

       case ACPI_NOTIFY_LID:
               (void)AcpiOsExecute(handler, acpilid_status_changed, dv);
               break;

       case ACPI_NOTIFY_DEVICE_WAKE:
               break;

       default:
               aprint_debug_dev(dv, "unknown notify 0x%02X\n", notify);
       }
}

MODULE(MODULE_CLASS_DRIVER, acpilid, "sysmon_power");

#ifdef _MODULE
#include "ioconf.c"
#endif

static int
acpilid_modcmd(modcmd_t cmd, void *aux)
{
       int rv = 0;

       switch (cmd) {

       case MODULE_CMD_INIT:

#ifdef _MODULE
               rv = config_init_component(cfdriver_ioconf_acpilid,
                   cfattach_ioconf_acpilid, cfdata_ioconf_acpilid);
#endif
               break;

       case MODULE_CMD_FINI:

#ifdef _MODULE
               rv = config_fini_component(cfdriver_ioconf_acpilid,
                   cfattach_ioconf_acpilid, cfdata_ioconf_acpilid);
#endif
               break;

       default:
               rv = ENOTTY;
       }

       return rv;
}