/*      $OpenBSD: ucc.c,v 1.37 2022/11/14 00:16:46 deraadt Exp $        */

/*
 * Copyright (c) 2021 Anton Lindqvist <anton@openbsd.org>
 *
 * 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 <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/uhidev.h>

#include <dev/hid/hidccvar.h>

struct ucc_softc {
        struct uhidev    sc_hdev;
        struct hidcc    *sc_cc;
};

int     ucc_match(struct device *, void *, void *);
void    ucc_attach(struct device *, struct device *, void *);
int     ucc_detach(struct device *, int);
void    ucc_intr(struct uhidev *, void *, u_int);

int     ucc_enable(void *, int);

struct cfdriver ucc_cd = {
        NULL, "ucc", DV_DULL
};

const struct cfattach ucc_ca = {
        sizeof(struct ucc_softc),
        ucc_match,
        ucc_attach,
        ucc_detach,
};

int
ucc_match(struct device *parent, void *match, void *aux)
{
        struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux;
        void *desc;
        int size;

        if (UHIDEV_CLAIM_MULTIPLE_REPORTID(uha))
                return UMATCH_NONE;

        uhidev_get_report_desc(uha->parent, &desc, &size);
        if (hid_report_size(desc, size, hid_input, uha->reportid) == 0)
                return UMATCH_NONE;
        if (!hidcc_match(desc, size, uha->reportid))
                return UMATCH_NONE;

        return UMATCH_IFACECLASS;
}

void
ucc_attach(struct device *parent, struct device *self, void *aux)
{
        struct ucc_softc *sc = (struct ucc_softc *)self;
        struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux;
        void *desc;
        int repid, size;

        sc->sc_hdev.sc_intr = ucc_intr;
        sc->sc_hdev.sc_parent = uha->parent;
        sc->sc_hdev.sc_udev = uha->uaa->device;
        sc->sc_hdev.sc_report_id = uha->reportid;

        uhidev_get_report_desc(uha->parent, &desc, &size);
        repid = uha->reportid;
        sc->sc_hdev.sc_isize = hid_report_size(desc, size, hid_input, repid);
        sc->sc_hdev.sc_osize = hid_report_size(desc, size, hid_output, repid);
        sc->sc_hdev.sc_fsize = hid_report_size(desc, size, hid_feature, repid);

        struct hidcc_attach_arg hca = {
                .device         = &sc->sc_hdev.sc_dev,
                .audio_cookie   = uha->uaa->cookie,
                .desc           = desc,
                .descsiz        = size,
                .repid          = repid,
                .isize          = sc->sc_hdev.sc_isize,
                .enable         = ucc_enable,
                .arg            = self,
        };
        sc->sc_cc = hidcc_attach(&hca);
}

int
ucc_detach(struct device *self, int flags)
{
        struct ucc_softc *sc = (struct ucc_softc *)self;
        int error = 0;

        uhidev_close(&sc->sc_hdev);
        if (sc->sc_cc != NULL)
                error = hidcc_detach(sc->sc_cc, flags);
        return error;
}

void
ucc_intr(struct uhidev *addr, void *data, u_int len)
{
        struct ucc_softc *sc = (struct ucc_softc *)addr;

        if (sc->sc_cc != NULL)
                hidcc_intr(sc->sc_cc, data, len);
}

int
ucc_enable(void *v, int on)
{
        struct ucc_softc *sc = (struct ucc_softc *)v;
        int error = 0;

        if (on)
                error = uhidev_open(&sc->sc_hdev);
        else
                uhidev_close(&sc->sc_hdev);
        return error;
}