/*      $OpenBSD: simpleamp.c,v 1.4 2022/04/06 18:59:28 naddy Exp $     */
/*
 * Copyright (c) 2020 Patrick Wildt <patrick@blueri.se>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

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

#include <machine/fdt.h>

#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_gpio.h>
#include <dev/ofw/ofw_misc.h>
#include <dev/ofw/ofw_regulator.h>

#include <sys/audioio.h>
#include <dev/audio_if.h>
#include <dev/midi_if.h>

int simpleamp_match(struct device *, void *, void *);
void simpleamp_attach(struct device *, struct device *, void *);

int simpleamp_open(void *, int);
void simpleamp_close(void *);

struct simpleamp_softc {
        struct device           sc_dev;
        struct dai_device       sc_dai;

        uint32_t                *sc_gpio;
        int                     sc_gpiolen;
        uint32_t                sc_vcc;
};

const struct audio_hw_if simpleamp_hw_if = {
        .open = simpleamp_open,
        .close = simpleamp_close,
};

const struct cfattach simpleamp_ca = {
        sizeof(struct simpleamp_softc), simpleamp_match, simpleamp_attach
};

struct cfdriver simpleamp_cd = {
        NULL, "simpleamp", DV_DULL
};

int
simpleamp_match(struct device *parent, void *match, void *aux)
{
        struct fdt_attach_args *faa = aux;

        return OF_is_compatible(faa->fa_node, "simple-audio-amplifier");
}

void
simpleamp_attach(struct device *parent, struct device *self, void *aux)
{
        struct simpleamp_softc *sc = (struct simpleamp_softc *)self;
        struct fdt_attach_args *faa = aux;

        sc->sc_gpiolen = OF_getproplen(faa->fa_node, "enable-gpios");
        if (sc->sc_gpiolen > 0) {
                sc->sc_gpio = malloc(sc->sc_gpiolen, M_DEVBUF, M_WAITOK);
                OF_getpropintarray(faa->fa_node, "enable-gpios",
                    sc->sc_gpio, sc->sc_gpiolen);
                gpio_controller_config_pin(sc->sc_gpio, GPIO_CONFIG_OUTPUT);
        }
        sc->sc_vcc = OF_getpropint(faa->fa_node, "VCC-supply", 0);

        printf("\n");

        sc->sc_dai.dd_node = faa->fa_node;
        sc->sc_dai.dd_cookie = sc;
        sc->sc_dai.dd_hw_if = &simpleamp_hw_if;
        dai_register(&sc->sc_dai);
}

int
simpleamp_open(void *cookie, int flags)
{
        struct simpleamp_softc *sc = cookie;

        if (sc->sc_gpio)
                gpio_controller_set_pin(sc->sc_gpio, 1);
        if (sc->sc_vcc)
                regulator_enable(sc->sc_vcc);

        return 0;
}

void
simpleamp_close(void *cookie)
{
        struct simpleamp_softc *sc = cookie;

        if (sc->sc_gpio)
                gpio_controller_set_pin(sc->sc_gpio, 0);
        if (sc->sc_vcc)
                regulator_disable(sc->sc_vcc);
}