1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2005, M. Warner Losh
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
12 * disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 */
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: stable/12/sys/dev/pccard/pccard_device.c 326255 2017-11-27 14:52:40Z pfg $");
32
33 #include <sys/param.h>
34 #include <sys/conf.h>
35 #include <sys/malloc.h>
36 #include <sys/systm.h>
37 #include <sys/uio.h>
38
39 #include <sys/bus.h>
40 #include <machine/bus.h>
41 #include <sys/rman.h>
42 #include <machine/resource.h>
43
44 #include <dev/pccard/pccardreg.h>
45 #include <dev/pccard/pccardvar.h>
46 #include <dev/pccard/pccardvarp.h>
47 #include <dev/pccard/pccard_cis.h>
48
49 static d_open_t pccard_open;
50 static d_close_t pccard_close;
51 static d_read_t pccard_read;
52 static d_ioctl_t pccard_ioctl;
53
54 static struct cdevsw pccard_cdevsw = {
55 .d_version = D_VERSION,
56 .d_open = pccard_open,
57 .d_close = pccard_close,
58 .d_read = pccard_read,
59 .d_ioctl = pccard_ioctl,
60 .d_name = "pccard"
61 };
62
63 int
pccard_device_create(struct pccard_softc * sc)64 pccard_device_create(struct pccard_softc *sc)
65 {
66 uint32_t minor;
67
68 minor = device_get_unit(sc->dev) << 16;
69 sc->cisdev = make_dev(&pccard_cdevsw, minor, 0, 0, 0666,
70 "pccard%u.cis", device_get_unit(sc->dev));
71 sc->cisdev->si_drv1 = sc;
72 return (0);
73 }
74
75 int
pccard_device_destroy(struct pccard_softc * sc)76 pccard_device_destroy(struct pccard_softc *sc)
77 {
78 if (sc->cisdev)
79 destroy_dev(sc->cisdev);
80 return (0);
81 }
82
83 static int
pccard_build_cis(const struct pccard_tuple * tuple,void * argp)84 pccard_build_cis(const struct pccard_tuple *tuple, void *argp)
85 {
86 struct cis_buffer *cis;
87 int i;
88 uint8_t ch;
89
90 cis = (struct cis_buffer *)argp;
91 /*
92 * CISTPL_END is a special case, it has no length field.
93 */
94 if (tuple->code == CISTPL_END) {
95 if (cis->len + 1 > sizeof(cis->buffer))
96 return (ENOSPC);
97 cis->buffer[cis->len++] = tuple->code;
98 return (0);
99 }
100 if (cis->len + 2 + tuple->length > sizeof(cis->buffer))
101 return (ENOSPC);
102 cis->buffer[cis->len++] = tuple->code;
103 cis->buffer[cis->len++] = tuple->length;
104 for (i = 0; i < tuple->length; i++) {
105 ch = pccard_tuple_read_1(tuple, i);
106 cis->buffer[cis->len++] = ch;
107 }
108 return (0);
109 }
110
111 static int
pccard_open(struct cdev * dev,int oflags,int devtype,struct thread * td)112 pccard_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
113 {
114 device_t parent, child;
115 device_t *kids;
116 int cnt, err;
117 struct pccard_softc *sc;
118
119 sc = dev->si_drv1;
120 if (sc->cis_open)
121 return (EBUSY);
122 parent = sc->dev;
123 err = device_get_children(parent, &kids, &cnt);
124 if (err)
125 return err;
126 if (cnt == 0) {
127 free(kids, M_TEMP);
128 sc->cis_open++;
129 sc->cis = NULL;
130 return (0);
131 }
132 child = kids[0];
133 free(kids, M_TEMP);
134 sc->cis = malloc(sizeof(*sc->cis), M_TEMP, M_ZERO | M_WAITOK);
135 err = pccard_scan_cis(parent, child, pccard_build_cis, sc->cis);
136 if (err) {
137 free(sc->cis, M_TEMP);
138 sc->cis = NULL;
139 return (err);
140 }
141 sc->cis_open++;
142 return (0);
143 }
144
145 static int
pccard_close(struct cdev * dev,int fflags,int devtype,struct thread * td)146 pccard_close(struct cdev *dev, int fflags, int devtype, struct thread *td)
147 {
148 struct pccard_softc *sc;
149
150 sc = dev->si_drv1;
151 free(sc->cis, M_TEMP);
152 sc->cis = NULL;
153 sc->cis_open = 0;
154 return (0);
155 }
156
157 static int
pccard_ioctl(struct cdev * dev,u_long cmd,caddr_t data,int fflag,struct thread * td)158 pccard_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
159 struct thread *td)
160 {
161 return (ENOTTY);
162 }
163
164 static int
pccard_read(struct cdev * dev,struct uio * uio,int ioflag)165 pccard_read(struct cdev *dev, struct uio *uio, int ioflag)
166 {
167 struct pccard_softc *sc;
168
169 sc = dev->si_drv1;
170 /* EOF */
171 if (sc->cis == NULL || uio->uio_offset > sc->cis->len)
172 return (0);
173 return (uiomove(sc->cis->buffer + uio->uio_offset,
174 MIN(uio->uio_resid, sc->cis->len - uio->uio_offset), uio));
175 }
176