/*      $OpenBSD: fido.c,v 1.7 2024/12/30 02:46:00 guenther Exp $       */

/*
 * Copyright (c) 2019 Reyk Floeter <reyk@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 "fido.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/conf.h>
#include <sys/tty.h>

#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>

#include <dev/usb/usbdi.h>

#include <dev/usb/uhidev.h>
#include <dev/usb/uhid.h>

int fido_match(struct device *, void *, void *);

struct cfdriver fido_cd = {
        NULL, "fido", DV_DULL
};

const struct cfattach fido_ca = {
        sizeof(struct uhid_softc),
        fido_match,
        uhid_attach,
        uhid_detach,
};

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

        if (UHIDEV_CLAIM_MULTIPLE_REPORTID(uha))
                return (ret);

        /* Find the FIDO usage page and U2F collection */
        uhidev_get_report_desc(uha->parent, &desc, &size);
        if (hid_is_collection(desc, size, uha->reportid,
            HID_USAGE2(HUP_FIDO, HUF_U2FHID)))
                ret = UMATCH_IFACECLASS;

        return (ret);
}

int
fidoopen(dev_t dev, int flag, int mode, struct proc *p)
{
        return (uhid_do_open(dev, flag, mode, p));
}

int
fidoioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
{
        int      error;

        switch (cmd) {
        case FIOASYNC:
        case USB_GET_DEVICEINFO:
                break;
        default:
                /*
                 * Users don't need USB/HID ioctl access to fido(4) devices
                 * but it can still be useful for debugging by root.
                 */
                if ((error = suser(p)) != 0)
                        return (error);
                break;
        }

        return (uhidioctl(dev, cmd, addr, flag, p));
}