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1/* $OpenBSD: ucrcom.c,v 1.3 2024/05/23 03:21:09 jsg Exp $ */
2
3/*
4 * Copyright (c) 2019 Mark Kettenis <kettenis@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 UCRCOMBUFSZ 64
31
32struct ucrcom_softc {
33 struct device sc_dev;
34 struct device *sc_subdev;
35};
36
37const struct ucom_methods ucrcom_methods = { NULL };
38
39int ucrcom_match(struct device *, void *, void *);
40void ucrcom_attach(struct device *, struct device *, void *);
41int ucrcom_detach(struct device *, int);
42
43struct cfdriver ucrcom_cd = {
44 NULL, "ucrcom", DV_DULL
45};
46
47const struct cfattach ucrcom_ca = {
48 sizeof(struct ucrcom_softc), ucrcom_match, ucrcom_attach, ucrcom_detach
49};
50
51int
52ucrcom_match(struct device *parent, void *match, void *aux)
53{
54 struct usb_attach_arg *uaa = aux;
55 usb_interface_descriptor_t *id;
56 usb_device_descriptor_t *dd;
57
58 if (uaa->iface == NULL)
59 return UMATCH_NONE;
60
61 id = usbd_get_interface_descriptor(uaa->iface);
62 dd = usbd_get_device_descriptor(uaa->device);
63 if (id == NULL || dd == NULL)
64 return UMATCH_NONE;
65
66 if (UGETW(dd->idVendor) == USB_VENDOR_GOOGLE &&
67 id->bInterfaceClass == UICLASS_VENDOR &&
68 id->bInterfaceSubClass == 0x50 &&
69 id->bInterfaceProtocol == 1)
70 return UMATCH_VENDOR_IFACESUBCLASS_IFACEPROTO;
71
72 return UMATCH_NONE;
73}
74
75void
76ucrcom_attach(struct device *parent, struct device *self, void *aux)
77{
78 struct ucrcom_softc *sc = (struct ucrcom_softc *)self;
79 struct usb_attach_arg *uaa = aux;
80 struct ucom_attach_args uca;
81 usb_interface_descriptor_t *id;
82 usb_endpoint_descriptor_t *ed;
83 int i;
84
85 id = usbd_get_interface_descriptor(uaa->iface);
86
87 memset(&uca, 0, sizeof(uca));
88 uca.bulkin = uca.bulkout = -1;
89 for (i = 0; i < id->bNumEndpoints; i++) {
90 ed = usbd_interface2endpoint_descriptor(uaa->iface, i);
91 if (ed == NULL) {
92 printf("%s: no endpoint descriptor for %d\n",
93 sc->sc_dev.dv_xname, i);
94 usbd_deactivate(uaa->device);
95 return;
96 }
97
98 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
99 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
100 uca.bulkin = ed->bEndpointAddress;
101 else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
102 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
103 uca.bulkout = ed->bEndpointAddress;
104 }
105
106 if (uca.bulkin == -1 || uca.bulkout == -1) {
107 printf("%s: missing endpoint\n", sc->sc_dev.dv_xname);
108 usbd_deactivate(uaa->device);
109 return;
110 }
111
112 uca.ibufsize = UCRCOMBUFSZ;
113 uca.ibufsizepad = UCRCOMBUFSZ;
114 uca.obufsize = UCRCOMBUFSZ;
115 uca.opkthdrlen = 0;
116 uca.device = uaa->device;
117 uca.iface = uaa->iface;
118 uca.methods = &ucrcom_methods;
119 uca.arg = sc;
120
121 sc->sc_subdev = config_found_sm(self, &uca, ucomprint, ucomsubmatch);
122}
123
124int
125ucrcom_detach(struct device *self, int flags)
126{
127 struct ucrcom_softc *sc = (struct ucrcom_softc *)self;
128 int rv = 0;
129
130 if (sc->sc_subdev != NULL)
131 rv = config_detach(sc->sc_subdev, flags);
132
133 return rv;
134}