/*	$NetBSD: umodem.c,v 1.67 2015/07/05 15:51:55 skrll Exp $	*/

/*
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Lennart Augustsson (lennart@augustsson.net) at
 * Carlstedt Research & Technology.
 *
 * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 FOUNDATION OR CONTRIBUTORS
 * 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.
 */

/*
 * Comm Class spec:  http://www.usb.org/developers/devclass_docs/usbccs10.pdf
 *                   http://www.usb.org/developers/devclass_docs/usbcdc11.pdf
 */

/*
 * TODO:
 * - Add error recovery in various places; the big problem is what
 *   to do in a callback if there is an error.
 * - Implement a Call Device for modems without multiplexed commands.
 *
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: umodem.c,v 1.67 2015/07/05 15:51:55 skrll Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/ioctl.h>
#include <sys/conf.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/select.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/device.h>
#include <sys/poll.h>

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

#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdevs.h>
#include <dev/usb/usb_quirks.h>

#include <dev/usb/ucomvar.h>
#include <dev/usb/umodemvar.h>

Static struct ucom_methods umodem_methods = {
	umodem_get_status,
	umodem_set,
	umodem_param,
	umodem_ioctl,
	umodem_open,
	umodem_close,
	NULL,
	NULL,
};

int             umodem_match(device_t, cfdata_t, void *);
void            umodem_attach(device_t, device_t, void *);
int             umodem_detach(device_t, int);
int             umodem_activate(device_t, enum devact);

extern struct cfdriver umodem_cd;

CFATTACH_DECL_NEW(umodem, sizeof(struct umodem_softc), umodem_match,
    umodem_attach, umodem_detach, umodem_activate);

int 
umodem_match(device_t parent, cfdata_t match, void *aux)
{
	struct usbif_attach_arg *uaa = aux;
	usb_interface_descriptor_t *id;
	int cm, acm;

	if (uaa->class != UICLASS_CDC ||
	    uaa->subclass != UISUBCLASS_ABSTRACT_CONTROL_MODEL ||
	    !(uaa->proto == UIPROTO_CDC_NOCLASS || uaa->proto == UIPROTO_CDC_AT))
		return (UMATCH_NONE);

	id = usbd_get_interface_descriptor(uaa->iface);
	if (umodem_get_caps(uaa->device, &cm, &acm, id) == -1)
		return (UMATCH_NONE);

	return (UMATCH_IFACECLASS_IFACESUBCLASS_IFACEPROTO);
}

void 
umodem_attach(device_t parent, device_t self, void *aux)
{
	struct umodem_softc *sc = device_private(self);
	struct usbif_attach_arg *uaa = aux;
	struct ucom_attach_args uca;

	uca.portno = UCOM_UNK_PORTNO;
	uca.methods = &umodem_methods;
	uca.info = NULL;

	if (!pmf_device_register(self, NULL, NULL))
		aprint_error_dev(self, "couldn't establish power handler");

	if (umodem_common_attach(self, sc, uaa, &uca))
		return;
	return;
}

int
umodem_activate(device_t self, enum devact act)
{
	struct umodem_softc *sc = device_private(self);

	return umodem_common_activate(sc, act);
}

int 
umodem_detach(device_t self, int flags)
{
	struct umodem_softc *sc = device_private(self);

	pmf_device_deregister(self);

	return umodem_common_detach(sc, flags);
}