cardbus_device.c revision 185545 
1/*-
2 * Copyright (c) 2005-2008, 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: head/sys/dev/cardbus/cardbus_device.c 185545 2008-12-02 04:54:31Z 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 <sys/pciio.h>
43#include <dev/pci/pcivar.h>
44#include <dev/pci/pcireg.h>
45#include <dev/pci/pci_private.h>
46
47#include <dev/cardbus/cardbusreg.h>
48#include <dev/cardbus/cardbusvar.h>
49#include <dev/cardbus/cardbus_cis.h>
50#include <dev/pccard/pccard_cis.h>
51
52static	d_open_t	cardbus_open;
53static	d_close_t	cardbus_close;
54static	d_read_t	cardbus_read;
55static	d_ioctl_t	cardbus_ioctl;
56
57static struct cdevsw cardbus_cdevsw = {
58	.d_version =	D_VERSION,
59	.d_open =	cardbus_open,
60	.d_close =	cardbus_close,
61	.d_read =	cardbus_read,
62	.d_ioctl =	cardbus_ioctl,
63	.d_name =	"cardbus"
64};
65
66static int
67cardbus_build_cis(device_t cbdev, device_t child, int id,
68    int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
69    struct tuple_callbacks *info, void *argp)
70{
71	struct cis_buffer *cis;
72	int i;
73
74	cis = (struct cis_buffer *)argp;
75	/*
76	 * CISTPL_END is a special case, it has no length field.
77	 */
78	if (id == CISTPL_END) {
79		if (cis->len + 1 > sizeof(cis->buffer)) {
80			cis->len = 0;
81			return (ENOSPC);
82		}
83		cis->buffer[cis->len++] = id;
84		return (0);
85	}
86	if (cis->len + 2 + len > sizeof(cis->buffer)) {
87		cis->len = 0;
88		return (ENOSPC);
89	}
90	cis->buffer[cis->len++] = id;
91	cis->buffer[cis->len++] = len;
92	for (i = 0; i < len; i++)
93		cis->buffer[cis->len++] = tupledata[i];
94	return (0);
95}
96
97static int
98cardbus_device_buffer_cis(device_t parent, device_t child,
99    struct cis_buffer *cbp)
100{
101	struct cardbus_softc *sc;
102	struct tuple_callbacks cb[] = {
103		{CISTPL_GENERIC, "GENERIC", cardbus_build_cis}
104	};
105
106	sc = device_get_softc(parent);
107	return (cardbus_parse_cis(parent, child, cb, cbp));
108}
109
110int
111cardbus_device_create(struct cardbus_softc *sc, struct cardbus_devinfo *devi,
112    device_t parent, device_t child)
113{
114	uint32_t minor;
115	int unit;
116
117	cardbus_device_buffer_cis(parent, child, &devi->sc_cis);
118	minor = (device_get_unit(sc->sc_dev) << 8) + devi->pci.cfg.func;
119	unit = device_get_unit(sc->sc_dev);
120	devi->sc_cisdev = make_dev(&cardbus_cdevsw, minor, 0, 0, 0666,
121	    "cardbus%d.%d.cis", unit, devi->pci.cfg.func);
122	if (devi->pci.cfg.func == 0)
123		make_dev_alias(devi->sc_cisdev, "cardbus%d.cis", unit);
124	devi->sc_cisdev->si_drv1 = devi;
125	return (0);
126}
127
128int
129cardbus_device_destroy(struct cardbus_devinfo *devi)
130{
131	if (devi->sc_cisdev)
132		destroy_dev(devi->sc_cisdev);
133	return (0);
134}
135
136static	int
137cardbus_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
138{
139
140	return (0);
141}
142
143static	int
144cardbus_close(struct cdev *dev, int fflags, int devtype, struct thread *td)
145{
146
147	return (0);
148}
149
150static	int
151cardbus_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
152    struct thread *td)
153{
154	return (ENOTTY);
155}
156
157static	int
158cardbus_read(struct cdev *dev, struct uio *uio, int ioflag)
159{
160	struct cardbus_devinfo *devi;
161
162	devi = dev->si_drv1;
163	/* EOF */
164	if (uio->uio_offset >= devi->sc_cis.len)
165		return (0);
166	return (uiomove(devi->sc_cis.buffer + uio->uio_offset,
167	  MIN(uio->uio_resid, devi->sc_cis.len - uio->uio_offset), uio));
168}
169