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/param.h>
33 #include <sys/kernel.h>
34 #include <sys/bus.h>
35 #include <sys/module.h>
36
37 #include <dev/bhnd/bhnd_ids.h>
38 #include <dev/bhnd/bhndb/bhndbvar.h>
39 #include <dev/bhnd/bhndb/bhndb_hwdata.h>
40
41 #include "bcmavar.h"
42
43 #include "bcma_eromreg.h"
44 #include "bcma_eromvar.h"
45
46 /*
47 * Supports attachment of bcma(4) bus devices via a bhndb bridge.
48 */
49
50 static int
bcma_bhndb_probe(device_t dev)51 bcma_bhndb_probe(device_t dev)
52 {
53 const struct bhnd_chipid *cid;
54 int error;
55
56 /* Defer to default probe implementation */
57 if ((error = bcma_probe(dev)) > 0)
58 return (error);
59
60 /* Check bus type */
61 cid = BHNDB_GET_CHIPID(device_get_parent(dev), dev);
62 if (cid->chip_type != BHND_CHIPTYPE_BCMA)
63 return (ENXIO);
64
65 /* Set device description */
66 bhnd_set_default_bus_desc(dev, cid);
67
68 return (error);
69 }
70
71 static int
bcma_bhndb_attach(device_t dev)72 bcma_bhndb_attach(device_t dev)
73 {
74 int error;
75
76 /* Perform initial attach and enumerate our children. */
77 if ((error = bcma_attach(dev)))
78 goto failed;
79
80 /* Delegate remainder to standard bhnd method implementation */
81 if ((error = bhnd_generic_attach(dev)))
82 goto failed;
83
84 return (0);
85
86 failed:
87 device_delete_children(dev);
88 return (error);
89 }
90
91 static int
bcma_bhndb_suspend_child(device_t dev,device_t child)92 bcma_bhndb_suspend_child(device_t dev, device_t child)
93 {
94 struct bcma_devinfo *dinfo;
95 int error;
96
97 if (device_get_parent(child) != dev)
98 BUS_SUSPEND_CHILD(device_get_parent(dev), child);
99
100 if (device_is_suspended(child))
101 return (EBUSY);
102
103 dinfo = device_get_ivars(child);
104
105 /* Suspend the child */
106 if ((error = bhnd_generic_br_suspend_child(dev, child)))
107 return (error);
108
109 /* Suspend child's agent resource */
110 if (dinfo->res_agent != NULL)
111 BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev,
112 SYS_RES_MEMORY, dinfo->res_agent->res);
113
114 return (0);
115 }
116
117 static int
bcma_bhndb_resume_child(device_t dev,device_t child)118 bcma_bhndb_resume_child(device_t dev, device_t child)
119 {
120 struct bcma_devinfo *dinfo;
121 int error;
122
123 if (device_get_parent(child) != dev)
124 BUS_SUSPEND_CHILD(device_get_parent(dev), child);
125
126 if (!device_is_suspended(child))
127 return (EBUSY);
128
129 dinfo = device_get_ivars(child);
130
131 /* Resume child's agent resource */
132 if (dinfo->res_agent != NULL) {
133 error = BHNDB_RESUME_RESOURCE(device_get_parent(dev), dev,
134 SYS_RES_MEMORY, dinfo->res_agent->res);
135 if (error)
136 return (error);
137 }
138
139 /* Resume the child */
140 if ((error = bhnd_generic_br_resume_child(dev, child))) {
141 /* On failure, re-suspend the agent resource */
142 if (dinfo->res_agent != NULL) {
143 BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev,
144 SYS_RES_MEMORY, dinfo->res_agent->res);
145 }
146
147 return (error);
148 }
149
150 return (0);
151 }
152
153 static device_method_t bcma_bhndb_methods[] = {
154 /* Device interface */
155 DEVMETHOD(device_probe, bcma_bhndb_probe),
156 DEVMETHOD(device_attach, bcma_bhndb_attach),
157
158 /* Bus interface */
159 DEVMETHOD(bus_suspend_child, bcma_bhndb_suspend_child),
160 DEVMETHOD(bus_resume_child, bcma_bhndb_resume_child),
161
162 DEVMETHOD_END
163 };
164
165 DEFINE_CLASS_2(bhnd, bcma_bhndb_driver, bcma_bhndb_methods,
166 sizeof(struct bcma_softc), bhnd_bhndb_driver, bcma_driver);
167
168 DRIVER_MODULE(bcma_bhndb, bhndb, bcma_bhndb_driver, NULL, NULL);
169
170 MODULE_VERSION(bcma_bhndb, 1);
171 MODULE_DEPEND(bcma_bhndb, bcma, 1, 1, 1);
172 MODULE_DEPEND(bcma_bhndb, bhnd, 1, 1, 1);
173 MODULE_DEPEND(bcma_bhndb, bhndb, 1, 1, 1);
174