/* $NetBSD: ug_isa.c,v 1.10 2022/09/25 17:09:36 thorpej Exp $ */

/*
 * Copyright (c) 2007 Mihai Chelaru <kefren@netbsd.ro>
 * All rights reserved.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
 */

/*
 * Driver for Abit uGuru (interface is inspired from it.c and nslm7x.c)
 * Inspired by olle sandberg linux driver as Abit didn't care to release docs
 * Support for uGuru 2005 from Louis Kruger and Hans de Goede linux driver
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ug_isa.c,v 1.10 2022/09/25 17:09:36 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/conf.h>
#include <sys/envsys.h>
#include <sys/time.h>

#include <sys/bus.h>
#include <sys/intr.h>

#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>

#include <dev/sysmon/sysmonvar.h>

#include <dev/ic/ugreg.h>
#include <dev/ic/ugvar.h>

/* autoconf(9) functions */
static int  ug_isa_match(device_t, cfdata_t, void *);
static void ug_isa_attach(device_t, device_t, void *);
static int  ug_isa_detach(device_t, int);

CFATTACH_DECL_NEW(ug_isa, sizeof(struct ug_softc),
    ug_isa_match, ug_isa_attach, ug_isa_detach, NULL);

extern uint8_t ug_ver;

static int
ug_isa_match(device_t parent, cfdata_t match, void *aux)
{
        struct isa_attach_args *ia = aux;
        bus_space_handle_t bsh;
        uint8_t valc, vald;

        if (ia->ia_nio < 1)     /* need base addr */
                return 0;

        if (ISA_DIRECT_CONFIG(ia))
                return 0;

        if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
                return 0;

        if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8, 0, &bsh))
                return 0;

        valc = bus_space_read_1(ia->ia_iot, bsh, UG_CMD);
        vald = bus_space_read_1(ia->ia_iot, bsh, UG_DATA);

        ug_ver = 0;

        /* Check for uGuru 2003 */

        if (((vald == 0) || (vald == 8)) && (valc == 0xAC))
                ug_ver = 1;

        /* Check for uGuru 2005 */
        if (ug2_sync(ia->ia_iot, bsh) == 1)
                ug_ver = 2;

        /* unmap, prepare ia and bye */
        bus_space_unmap(ia->ia_iot, bsh, 8);

        if (ug_ver != 0) {
                ia->ia_nio = 1;
                ia->ia_io[0].ir_size = 8;
                ia->ia_niomem = 0;
                ia->ia_nirq = 0;
                ia->ia_ndrq = 0;
                return 1;
        }

        return 0;

}

static void
ug_isa_attach(device_t parent, device_t self, void *aux)
{
        struct ug_softc *sc = device_private(self);
        struct isa_attach_args *ia = aux;
        int i;

        if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr,
            8, 0, &sc->sc_ioh)) {
                aprint_error(": can't map i/o space\n");
                return;
        }

        ia->ia_iot = sc->sc_iot;
        sc->version = ug_ver;

        if (sc->version == 2) {
                ug2_attach(self);
                return;
        }

        aprint_normal(": Abit uGuru system monitor\n");

        if (!ug_reset(sc))
                aprint_error_dev(self, "reset failed.\n");

        ug_setup_sensors(sc);
        sc->sc_sme = sysmon_envsys_create();

        for (i = 0; i < UG_NUM_SENSORS; i++) {
                if (sysmon_envsys_sensor_attach(sc->sc_sme,
                                                &sc->sc_sensor[i])) {
                        sysmon_envsys_destroy(sc->sc_sme);
                        sc->sc_sme = NULL;
                        goto out;
                }
        }

        sc->sc_sme->sme_cookie = sc;
        sc->sc_sme->sme_refresh = ug_refresh;

        if (sysmon_envsys_register(sc->sc_sme)) {
                aprint_error_dev(self, "unable to register with sysmon\n");
                sysmon_envsys_destroy(sc->sc_sme);
                sc->sc_sme = NULL;
                goto out;
        }

        return;

out:
        bus_space_unmap(sc->sc_iot, sc->sc_ioh, 8);

}

static int
ug_isa_detach(device_t self, int flags)
{
        struct ug_softc *sc = device_private(self);

        if (sc->sc_sme != NULL)
                sysmon_envsys_unregister(sc->sc_sme);
        bus_space_unmap(sc->sc_iot, sc->sc_ioh, 8);
        return 0;
}