jcs.org
jcs's openbsd hax
openbsd
1/* $OpenBSD: uscom.c,v 1.9 2024/05/23 03:21:09 jsg Exp $ */
2
3/*
4 * Copyright (c) 2006 Jonathan Gray <jsg@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <sys/param.h>
20#include <sys/systm.h>
21#include <sys/tty.h>
22#include <sys/device.h>
23
24#include <dev/usb/usb.h>
25#include <dev/usb/usbdi.h>
26#include <dev/usb/usbdevs.h>
27
28#include <dev/usb/ucomvar.h>
29
30#define USCOMBUFSZ 256
31#define USCOM_IFACE_NO 0
32
33struct uscom_softc {
34 struct device sc_dev;
35 struct usbd_device *sc_udev;
36 struct usbd_interface *sc_iface;
37 struct device *sc_subdev;
38};
39
40const struct ucom_methods uscom_methods = {
41 NULL,
42 NULL,
43 NULL,
44 NULL,
45 NULL,
46 NULL,
47 NULL,
48 NULL,
49};
50
51static const struct usb_devno uscom_devs[] = {
52 { USB_VENDOR_HP, USB_PRODUCT_HP_HPX9GP },
53 { USB_VENDOR_DYNASTREAM, USB_PRODUCT_DYNASTREAM_ANTUSB2 },
54 { USB_VENDOR_DYNASTREAM, USB_PRODUCT_DYNASTREAM_ANTUSBM }
55};
56
57int uscom_match(struct device *, void *, void *);
58void uscom_attach(struct device *, struct device *, void *);
59int uscom_detach(struct device *, int);
60
61struct cfdriver uscom_cd = {
62 NULL, "uscom", DV_DULL
63};
64
65const struct cfattach uscom_ca = {
66 sizeof(struct uscom_softc), uscom_match, uscom_attach, uscom_detach
67};
68
69int
70uscom_match(struct device *parent, void *match, void *aux)
71{
72 struct usb_attach_arg *uaa = aux;
73
74 if (uaa->iface == NULL)
75 return UMATCH_NONE;
76
77 return (usb_lookup(uscom_devs, uaa->vendor, uaa->product) != NULL) ?
78 UMATCH_VENDOR_PRODUCT : UMATCH_NONE;
79}
80
81void
82uscom_attach(struct device *parent, struct device *self, void *aux)
83{
84 struct uscom_softc *sc = (struct uscom_softc *)self;
85 struct usb_attach_arg *uaa = aux;
86 struct ucom_attach_args uca;
87 usb_interface_descriptor_t *id;
88 usb_endpoint_descriptor_t *ed;
89 usbd_status error;
90 int i;
91
92 bzero(&uca, sizeof(uca));
93 sc->sc_udev = uaa->device;
94
95 /* get the first interface handle */
96 error = usbd_device2interface_handle(sc->sc_udev, USCOM_IFACE_NO,
97 &sc->sc_iface);
98 if (error != 0) {
99 printf("%s: could not get interface handle\n",
100 sc->sc_dev.dv_xname);
101 usbd_deactivate(sc->sc_udev);
102 return;
103 }
104
105 id = usbd_get_interface_descriptor(sc->sc_iface);
106
107 uca.bulkin = uca.bulkout = -1;
108 for (i = 0; i < id->bNumEndpoints; i++) {
109 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i);
110 if (ed == NULL) {
111 printf("%s: no endpoint descriptor found for %d\n",
112 sc->sc_dev.dv_xname, i);
113 usbd_deactivate(sc->sc_udev);
114 return;
115 }
116
117 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
118 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
119 uca.bulkin = ed->bEndpointAddress;
120 else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
121 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
122 uca.bulkout = ed->bEndpointAddress;
123 }
124
125 if (uca.bulkin == -1 || uca.bulkout == -1) {
126 printf("%s: missing endpoint\n", sc->sc_dev.dv_xname);
127 usbd_deactivate(sc->sc_udev);
128 return;
129 }
130
131 uca.ibufsize = USCOMBUFSZ;
132 uca.obufsize = USCOMBUFSZ;
133 uca.ibufsizepad = USCOMBUFSZ;
134 uca.opkthdrlen = 0;
135 uca.device = sc->sc_udev;
136 uca.iface = sc->sc_iface;
137 uca.methods = &uscom_methods;
138 uca.arg = sc;
139 uca.info = NULL;
140
141 sc->sc_subdev = config_found_sm(self, &uca, ucomprint, ucomsubmatch);
142}
143
144int
145uscom_detach(struct device *self, int flags)
146{
147 struct uscom_softc *sc = (struct uscom_softc *)self;
148 int rv = 0;
149
150 if (sc->sc_subdev != NULL) {
151 rv = config_detach(sc->sc_subdev, flags);
152 sc->sc_subdev = NULL;
153 }
154
155 return (rv);
156}