xref: /freebsd/sys/dev/bhnd/bcma/bcma_bhndb.c (revision f061a2215f9bf0bea98ac601a34750f89428db67)
1 /*-
2  * Copyright (c) 2015 Landon Fuller <landon@landonf.org>
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, this list of conditions and the following disclaimer,
10  *    without modification.
11  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12  *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13  *    redistribution must be conditioned upon including a substantially
14  *    similar Disclaimer requirement for further binary redistribution.
15  *
16  * NO WARRANTY
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19  * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
20  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21  * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
22  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27  * THE POSSIBILITY OF SUCH DAMAGES.
28  */
29 
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32 
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
52 bcma_bhndb_probe(device_t dev)
53 {
54 	const struct bhnd_chipid *cid;
55 
56 	/* Check bus type */
57 	cid = BHNDB_GET_CHIPID(device_get_parent(dev), dev);
58 	if (cid->chip_type != BHND_CHIPTYPE_BCMA)
59 		return (ENXIO);
60 
61 	/* Delegate to default probe implementation */
62 	return (bcma_probe(dev));
63 }
64 
65 static int
66 bcma_bhndb_attach(device_t dev)
67 {
68 	struct bcma_softc		*sc;
69 	const struct bhnd_chipid	*cid;
70 	struct resource			*erom_res;
71 	int				 error;
72 	int				 rid;
73 
74 	sc = device_get_softc(dev);
75 
76 	/* Map the EROM resource and enumerate our children. */
77 	cid = BHNDB_GET_CHIPID(device_get_parent(dev), dev);
78 	rid = 0;
79 	erom_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, cid->enum_addr,
80 		cid->enum_addr + BCMA_EROM_TABLE_SIZE, BCMA_EROM_TABLE_SIZE,
81 		RF_ACTIVE);
82 	if (erom_res == NULL) {
83 		device_printf(dev, "failed to allocate EROM resource\n");
84 		return (ENXIO);
85 	}
86 
87 	error = bcma_add_children(dev, erom_res, BCMA_EROM_TABLE_START);
88 
89 	/* Clean up */
90 	bus_release_resource(dev, SYS_RES_MEMORY, rid, erom_res);
91 	if (error)
92 		return (error);
93 
94 	/* Initialize full bridge configuration */
95 	error = BHNDB_INIT_FULL_CONFIG(device_get_parent(dev), dev,
96 	    bhndb_bcma_priority_table);
97 	if (error)
98 		return (error);
99 
100 	/* Ask our parent bridge to find the corresponding bridge core */
101 	sc->hostb_dev = BHNDB_FIND_HOSTB_DEVICE(device_get_parent(dev), dev);
102 
103 	/* Call our superclass' implementation */
104 	return (bcma_attach(dev));
105 }
106 
107 static int
108 bcma_bhndb_suspend_child(device_t dev, device_t child)
109 {
110 	struct bcma_devinfo	*dinfo;
111 	int			 error;
112 
113 	if (device_get_parent(child) != dev)
114 		BUS_SUSPEND_CHILD(device_get_parent(dev), child);
115 
116 	if (device_is_suspended(child))
117 		return (EBUSY);
118 
119 	dinfo = device_get_ivars(child);
120 
121 	/* Suspend the child */
122 	if ((error = bhnd_generic_br_suspend_child(dev, child)))
123 		return (error);
124 
125 	/* Suspend child's agent resource  */
126 	if (dinfo->res_agent != NULL)
127 		BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev,
128 		    SYS_RES_MEMORY, dinfo->res_agent->res);
129 
130 	return (0);
131 }
132 
133 static int
134 bcma_bhndb_resume_child(device_t dev, device_t child)
135 {
136 	struct bcma_devinfo	*dinfo;
137 	int			 error;
138 
139 	if (device_get_parent(child) != dev)
140 		BUS_SUSPEND_CHILD(device_get_parent(dev), child);
141 
142 	if (!device_is_suspended(child))
143 		return (EBUSY);
144 
145 	dinfo = device_get_ivars(child);
146 
147 	/* Resume child's agent resource  */
148 	if (dinfo->res_agent != NULL) {
149 		error = BHNDB_RESUME_RESOURCE(device_get_parent(dev), dev,
150 		    SYS_RES_MEMORY, dinfo->res_agent->res);
151 		if (error)
152 			return (error);
153 	}
154 
155 	/* Resume the child */
156 	if ((error = bhnd_generic_br_resume_child(dev, child))) {
157 		/* On failure, re-suspend the agent resource */
158 		if (dinfo->res_agent != NULL) {
159 			BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev,
160 			    SYS_RES_MEMORY, dinfo->res_agent->res);
161 		}
162 
163 		return (error);
164 	}
165 
166 	return (0);
167 }
168 
169 static device_method_t bcma_bhndb_methods[] = {
170 	/* Device interface */
171 	DEVMETHOD(device_probe,			bcma_bhndb_probe),
172 	DEVMETHOD(device_attach,		bcma_bhndb_attach),
173 
174 	/* Bus interface */
175 	DEVMETHOD(bus_suspend_child,		bcma_bhndb_suspend_child),
176 	DEVMETHOD(bus_resume_child,		bcma_bhndb_resume_child),
177 
178 	DEVMETHOD_END
179 };
180 
181 DEFINE_CLASS_2(bhnd, bcma_bhndb_driver, bcma_bhndb_methods,
182     sizeof(struct bcma_softc), bhnd_bhndb_driver, bcma_driver);
183 
184 DRIVER_MODULE(bcma_bhndb, bhndb, bcma_bhndb_driver, bhnd_devclass, NULL, NULL);
185 
186 MODULE_VERSION(bcma_bhndb, 1);
187 MODULE_DEPEND(bcma_bhndb, bcma, 1, 1, 1);
188 MODULE_DEPEND(bcma_bhndb, bhnd, 1, 1, 1);
189 MODULE_DEPEND(bcma_bhndb, bhndb, 1, 1, 1);
190