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("$FreeBSD$");
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
47static	d_open_t	pccard_open;
48static	d_close_t	pccard_close;
49static	d_read_t	pccard_read;
50static	d_ioctl_t	pccard_ioctl;
51
52static 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
61int
62pccard_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
73int
74pccard_device_destroy(struct pccard_softc *sc)
75{
76	if (sc->cisdev)
77		destroy_dev(sc->cisdev);
78	return (0);
79}
80
81static int
82pccard_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
109static	int
110pccard_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
143static	int
144pccard_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
155static	int
156pccard_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
157    struct thread *td)
158{
159	return (ENOTTY);
160}
161
162static	int
163pccard_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