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umodem.c revision 1.68 
      1 /*	$NetBSD: umodem.c,v 1.68 2016/04/23 10:15:32 skrll Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Lennart Augustsson (lennart (at) augustsson.net) at
      9  * Carlstedt Research & Technology.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 /*
     34  * Comm Class spec:  http://www.usb.org/developers/devclass_docs/usbccs10.pdf
     35  *                   http://www.usb.org/developers/devclass_docs/usbcdc11.pdf
     36  */
     37 
     38 /*
     39  * TODO:
     40  * - Add error recovery in various places; the big problem is what
     41  *   to do in a callback if there is an error.
     42  * - Implement a Call Device for modems without multiplexed commands.
     43  *
     44  */
     45 
     46 #include <sys/cdefs.h>
     47 __KERNEL_RCSID(0, "$NetBSD: umodem.c,v 1.68 2016/04/23 10:15:32 skrll Exp $");
     48 
     49 #include <sys/param.h>
     50 #include <sys/systm.h>
     51 #include <sys/kernel.h>
     52 #include <sys/ioctl.h>
     53 #include <sys/conf.h>
     54 #include <sys/tty.h>
     55 #include <sys/file.h>
     56 #include <sys/select.h>
     57 #include <sys/proc.h>
     58 #include <sys/vnode.h>
     59 #include <sys/device.h>
     60 #include <sys/poll.h>
     61 
     62 #include <dev/usb/usb.h>
     63 #include <dev/usb/usbcdc.h>
     64 
     65 #include <dev/usb/usbdi.h>
     66 #include <dev/usb/usbdi_util.h>
     67 #include <dev/usb/usbdevs.h>
     68 #include <dev/usb/usb_quirks.h>
     69 
     70 #include <dev/usb/ucomvar.h>
     71 #include <dev/usb/umodemvar.h>
     72 
     73 Static struct ucom_methods umodem_methods = {
     74 	.ucom_get_status = umodem_get_status,
     75 	.ucom_set = umodem_set,
     76 	.ucom_param = umodem_param,
     77 	.ucom_ioctl = umodem_ioctl,
     78 	.ucom_open = umodem_open,
     79 	.ucom_close = umodem_close,
     80 	.ucom_read = NULL,
     81 	.ucom_write = NULL,
     82 };
     83 
     84 int             umodem_match(device_t, cfdata_t, void *);
     85 void            umodem_attach(device_t, device_t, void *);
     86 int             umodem_detach(device_t, int);
     87 int             umodem_activate(device_t, enum devact);
     88 
     89 extern struct cfdriver umodem_cd;
     90 
     91 CFATTACH_DECL_NEW(umodem, sizeof(struct umodem_softc), umodem_match,
     92     umodem_attach, umodem_detach, umodem_activate);
     93 
     94 int
     95 umodem_match(device_t parent, cfdata_t match, void *aux)
     96 {
     97 	struct usbif_attach_arg *uiaa = aux;
     98 	usb_interface_descriptor_t *id;
     99 	int cm, acm;
    100 
    101 	if (uiaa->uiaa_class != UICLASS_CDC ||
    102 	    uiaa->uiaa_subclass != UISUBCLASS_ABSTRACT_CONTROL_MODEL ||
    103 	    !(uiaa->uiaa_proto == UIPROTO_CDC_NOCLASS || uiaa->uiaa_proto == UIPROTO_CDC_AT))
    104 		return UMATCH_NONE;
    105 
    106 	id = usbd_get_interface_descriptor(uiaa->uiaa_iface);
    107 	if (umodem_get_caps(uiaa->uiaa_device, &cm, &acm, id) == -1)
    108 		return UMATCH_NONE;
    109 
    110 	return UMATCH_IFACECLASS_IFACESUBCLASS_IFACEPROTO;
    111 }
    112 //
    113 void
    114 umodem_attach(device_t parent, device_t self, void *aux)
    115 {
    116 	struct umodem_softc *sc = device_private(self);
    117 	struct usbif_attach_arg *uiaa = aux;
    118 	struct ucom_attach_args ucaa;
    119 
    120 	ucaa.ucaa_portno = UCOM_UNK_PORTNO;
    121 	ucaa.ucaa_methods = &umodem_methods;
    122 	ucaa.ucaa_info = NULL;
    123 
    124 	if (!pmf_device_register(self, NULL, NULL))
    125 		aprint_error_dev(self, "couldn't establish power handler");
    126 
    127 	if (umodem_common_attach(self, sc, uiaa, &ucaa))
    128 		return;
    129 	return;
    130 }
    131 
    132 int
    133 umodem_activate(device_t self, enum devact act)
    134 {
    135 	struct umodem_softc *sc = device_private(self);
    136 
    137 	return umodem_common_activate(sc, act);
    138 }
    139 
    140 int
    141 umodem_detach(device_t self, int flags)
    142 {
    143 	struct umodem_softc *sc = device_private(self);
    144 
    145 	pmf_device_deregister(self);
    146 
    147 	return umodem_common_detach(sc, flags);
    148 }
    149