1 /*-
2 * Copyright (c) 2005, M. Warner Losh
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 */
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: stable/10/sys/dev/pccard/pccard_device.c 150432 2005-09-21 20:08:24Z imp $");
30
31 #include <sys/param.h>
32 #include <sys/conf.h>
33 #include <sys/malloc.h>
34 #include <sys/systm.h>
35 #include <sys/uio.h>
36
37 #include <sys/bus.h>
38 #include <machine/bus.h>
39 #include <sys/rman.h>
40 #include <machine/resource.h>
41
42 #include <dev/pccard/pccardreg.h>
43 #include <dev/pccard/pccardvar.h>
44 #include <dev/pccard/pccardvarp.h>
45 #include <dev/pccard/pccard_cis.h>
46
47 static d_open_t pccard_open;
48 static d_close_t pccard_close;
49 static d_read_t pccard_read;
50 static d_ioctl_t pccard_ioctl;
51
52 static struct cdevsw pccard_cdevsw = {
53 .d_version = D_VERSION,
54 .d_open = pccard_open,
55 .d_close = pccard_close,
56 .d_read = pccard_read,
57 .d_ioctl = pccard_ioctl,
58 .d_name = "pccard"
59 };
60
61 int
pccard_device_create(struct pccard_softc * sc)62 pccard_device_create(struct pccard_softc *sc)
63 {
64 uint32_t minor;
65
66 minor = device_get_unit(sc->dev) << 16;
67 sc->cisdev = make_dev(&pccard_cdevsw, minor, 0, 0, 0666,
68 "pccard%u.cis", device_get_unit(sc->dev));
69 sc->cisdev->si_drv1 = sc;
70 return (0);
71 }
72
73 int
pccard_device_destroy(struct pccard_softc * sc)74 pccard_device_destroy(struct pccard_softc *sc)
75 {
76 if (sc->cisdev)
77 destroy_dev(sc->cisdev);
78 return (0);
79 }
80
81 static int
pccard_build_cis(const struct pccard_tuple * tuple,void * argp)82 pccard_build_cis(const struct pccard_tuple *tuple, void *argp)
83 {
84 struct cis_buffer *cis;
85 int i;
86 uint8_t ch;
87
88 cis = (struct cis_buffer *)argp;
89 /*
90 * CISTPL_END is a special case, it has no length field.
91 */
92 if (tuple->code == CISTPL_END) {
93 if (cis->len + 1 > sizeof(cis->buffer))
94 return (ENOSPC);
95 cis->buffer[cis->len++] = tuple->code;
96 return (0);
97 }
98 if (cis->len + 2 + tuple->length > sizeof(cis->buffer))
99 return (ENOSPC);
100 cis->buffer[cis->len++] = tuple->code;
101 cis->buffer[cis->len++] = tuple->length;
102 for (i = 0; i < tuple->length; i++) {
103 ch = pccard_tuple_read_1(tuple, i);
104 cis->buffer[cis->len++] = ch;
105 }
106 return (0);
107 }
108
109 static int
pccard_open(struct cdev * dev,int oflags,int devtype,struct thread * td)110 pccard_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
111 {
112 device_t parent, child;
113 device_t *kids;
114 int cnt, err;
115 struct pccard_softc *sc;
116
117 sc = dev->si_drv1;
118 if (sc->cis_open)
119 return (EBUSY);
120 parent = sc->dev;
121 err = device_get_children(parent, &kids, &cnt);
122 if (err)
123 return err;
124 if (cnt == 0) {
125 free(kids, M_TEMP);
126 sc->cis_open++;
127 sc->cis = NULL;
128 return (0);
129 }
130 child = kids[0];
131 free(kids, M_TEMP);
132 sc->cis = malloc(sizeof(*sc->cis), M_TEMP, M_ZERO | M_WAITOK);
133 err = pccard_scan_cis(parent, child, pccard_build_cis, sc->cis);
134 if (err) {
135 free(sc->cis, M_TEMP);
136 sc->cis = NULL;
137 return (err);
138 }
139 sc->cis_open++;
140 return (0);
141 }
142
143 static int
pccard_close(struct cdev * dev,int fflags,int devtype,struct thread * td)144 pccard_close(struct cdev *dev, int fflags, int devtype, struct thread *td)
145 {
146 struct pccard_softc *sc;
147
148 sc = dev->si_drv1;
149 free(sc->cis, M_TEMP);
150 sc->cis = NULL;
151 sc->cis_open = 0;
152 return (0);
153 }
154
155 static int
pccard_ioctl(struct cdev * dev,u_long cmd,caddr_t data,int fflag,struct thread * td)156 pccard_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
157 struct thread *td)
158 {
159 return (ENOTTY);
160 }
161
162 static int
pccard_read(struct cdev * dev,struct uio * uio,int ioflag)163 pccard_read(struct cdev *dev, struct uio *uio, int ioflag)
164 {
165 struct pccard_softc *sc;
166
167 sc = dev->si_drv1;
168 /* EOF */
169 if (sc->cis == NULL || uio->uio_offset > sc->cis->len)
170 return (0);
171 return (uiomove(sc->cis->buffer + uio->uio_offset,
172 MIN(uio->uio_resid, sc->cis->len - uio->uio_offset), uio));
173 }
174