options.c revision 7656:2621e50fdf4a 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27
28#include <sys/types.h>
29#include <sys/errno.h>
30#include <sys/conf.h>
31#include <sys/ddi.h>
32#include <sys/sunddi.h>
33
34/*
35 * Configuration information
36 */
37
38static int options_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg,
39		void **result);
40static int options_attach(dev_info_t *devi, ddi_attach_cmd_t cmd);
41static int options_detach(dev_info_t *devi, ddi_detach_cmd_t cmd);
42static dev_info_t *options_devi;
43
44struct dev_ops	options_ops = {
45
46	DEVO_REV,		/* devo_rev, */
47	0,			/* refcnt  */
48	options_info,		/* info */
49	nulldev,		/* identify */
50	nulldev,		/* probe */
51	options_attach,		/* attach */
52	options_detach,		/* detach */
53	nodev,			/* reset */
54	(struct cb_ops *)0,	/* driver operations */
55	(struct bus_ops *)0,	/* bus operations */
56	nulldev,		/* power */
57	ddi_quiesce_not_needed,		/* quiesce */
58
59};
60
61/*
62 * Autoload Data and Autoload Entry
63 */
64
65#include <sys/modctl.h>
66
67extern struct mod_ops mod_driverops;
68static struct modldrv modldrv = {
69	&mod_driverops,	/* Type of module. This one is a driver */
70	"options driver",	/* Name of the module. */
71	&options_ops,	/* driver ops */
72};
73
74static struct modlinkage modlinkage = {
75	MODREV_1, (void *)&modldrv
76};
77
78/*
79 * This is the driver initialization routine.
80 */
81
82int
83_init()
84{
85	return (mod_install(&modlinkage));
86}
87
88int
89_fini()
90{
91	return (EBUSY);
92}
93
94int
95_info(modinfop)
96	struct modinfo *modinfop;
97{
98	return (mod_info(&modlinkage, modinfop));
99}
100
101/* ARGSUSED */
102static int
103options_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
104{
105	register int error;
106
107	switch (infocmd) {
108	case DDI_INFO_DEVT2DEVINFO:
109		if (options_devi == NULL) {
110			error = DDI_FAILURE;
111		} else {
112			*result = (void *) options_devi;
113			error = DDI_SUCCESS;
114		}
115		break;
116	case DDI_INFO_DEVT2INSTANCE:
117		*result = (void *)0;
118		error = DDI_SUCCESS;
119		break;
120	default:
121		error = DDI_FAILURE;
122	}
123	return (error);
124}
125
126static int
127options_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
128{
129	switch (cmd) {
130	case DDI_ATTACH:
131		options_devi = devi;
132		return (DDI_SUCCESS);
133
134	case DDI_RESUME:
135		return (DDI_SUCCESS);
136
137	default:
138		return (DDI_FAILURE);
139	}
140}
141
142/*ARGSUSED*/
143static int
144options_detach(dev_info_t *devi, ddi_detach_cmd_t cmd)
145{
146	switch (cmd) {
147	case DDI_SUSPEND:
148		return (DDI_SUCCESS);
149
150	case DDI_DETACH:
151	default:
152		return (DDI_FAILURE);
153	}
154}
155