1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2015 Landon Fuller <landon@landonf.org>
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, this list of conditions and the following disclaimer,
12 * without modification.
13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
14 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
15 * redistribution must be conditioned upon including a substantially
16 * similar Disclaimer requirement for further binary redistribution.
17 *
18 * NO WARRANTY
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
23 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
24 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
27 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
29 * THE POSSIBILITY OF SUCH DAMAGES.
30 */
31
32 #include <sys/cdefs.h>
33 #include <sys/param.h>
34 #include <sys/kernel.h>
35 #include <sys/bus.h>
36 #include <sys/module.h>
37
38 #include <dev/bhnd/bhnd_ids.h>
39 #include <dev/bhnd/bhndb/bhndbvar.h>
40 #include <dev/bhnd/bhndb/bhndb_hwdata.h>
41
42 #include "bcmavar.h"
43
44 #include "bcma_eromreg.h"
45 #include "bcma_eromvar.h"
46
47 /*
48 * Supports attachment of bcma(4) bus devices via a bhndb bridge.
49 */
50
51 static int
bcma_bhndb_probe(device_t dev)52 bcma_bhndb_probe(device_t dev)
53 {
54 const struct bhnd_chipid *cid;
55 int error;
56
57 /* Defer to default probe implementation */
58 if ((error = bcma_probe(dev)) > 0)
59 return (error);
60
61 /* Check bus type */
62 cid = BHNDB_GET_CHIPID(device_get_parent(dev), dev);
63 if (cid->chip_type != BHND_CHIPTYPE_BCMA)
64 return (ENXIO);
65
66 /* Set device description */
67 bhnd_set_default_bus_desc(dev, cid);
68
69 return (error);
70 }
71
72 static int
bcma_bhndb_attach(device_t dev)73 bcma_bhndb_attach(device_t dev)
74 {
75 int error;
76
77 /* Perform initial attach and enumerate our children. */
78 if ((error = bcma_attach(dev)))
79 goto failed;
80
81 /* Delegate remainder to standard bhnd method implementation */
82 if ((error = bhnd_generic_attach(dev)))
83 goto failed;
84
85 return (0);
86
87 failed:
88 device_delete_children(dev);
89 return (error);
90 }
91
92 static int
bcma_bhndb_suspend_child(device_t dev,device_t child)93 bcma_bhndb_suspend_child(device_t dev, device_t child)
94 {
95 struct bcma_devinfo *dinfo;
96 int error;
97
98 if (device_get_parent(child) != dev)
99 BUS_SUSPEND_CHILD(device_get_parent(dev), child);
100
101 if (device_is_suspended(child))
102 return (EBUSY);
103
104 dinfo = device_get_ivars(child);
105
106 /* Suspend the child */
107 if ((error = bhnd_generic_br_suspend_child(dev, child)))
108 return (error);
109
110 /* Suspend child's agent resource */
111 if (dinfo->res_agent != NULL)
112 BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev,
113 SYS_RES_MEMORY, dinfo->res_agent->res);
114
115 return (0);
116 }
117
118 static int
bcma_bhndb_resume_child(device_t dev,device_t child)119 bcma_bhndb_resume_child(device_t dev, device_t child)
120 {
121 struct bcma_devinfo *dinfo;
122 int error;
123
124 if (device_get_parent(child) != dev)
125 BUS_SUSPEND_CHILD(device_get_parent(dev), child);
126
127 if (!device_is_suspended(child))
128 return (EBUSY);
129
130 dinfo = device_get_ivars(child);
131
132 /* Resume child's agent resource */
133 if (dinfo->res_agent != NULL) {
134 error = BHNDB_RESUME_RESOURCE(device_get_parent(dev), dev,
135 SYS_RES_MEMORY, dinfo->res_agent->res);
136 if (error)
137 return (error);
138 }
139
140 /* Resume the child */
141 if ((error = bhnd_generic_br_resume_child(dev, child))) {
142 /* On failure, re-suspend the agent resource */
143 if (dinfo->res_agent != NULL) {
144 BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev,
145 SYS_RES_MEMORY, dinfo->res_agent->res);
146 }
147
148 return (error);
149 }
150
151 return (0);
152 }
153
154 static device_method_t bcma_bhndb_methods[] = {
155 /* Device interface */
156 DEVMETHOD(device_probe, bcma_bhndb_probe),
157 DEVMETHOD(device_attach, bcma_bhndb_attach),
158
159 /* Bus interface */
160 DEVMETHOD(bus_suspend_child, bcma_bhndb_suspend_child),
161 DEVMETHOD(bus_resume_child, bcma_bhndb_resume_child),
162
163 DEVMETHOD_END
164 };
165
166 DEFINE_CLASS_2(bhnd, bcma_bhndb_driver, bcma_bhndb_methods,
167 sizeof(struct bcma_softc), bhnd_bhndb_driver, bcma_driver);
168
169 DRIVER_MODULE(bcma_bhndb, bhndb, bcma_bhndb_driver, bhnd_devclass, NULL, NULL);
170
171 MODULE_VERSION(bcma_bhndb, 1);
172 MODULE_DEPEND(bcma_bhndb, bcma, 1, 1, 1);
173 MODULE_DEPEND(bcma_bhndb, bhnd, 1, 1, 1);
174 MODULE_DEPEND(bcma_bhndb, bhndb, 1, 1, 1);
175