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
51static int
52bcma_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
65static int
66bcma_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
107static int
108bcma_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
133static int
134bcma_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
169static 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
181DEFINE_CLASS_2(bhnd, bcma_bhndb_driver, bcma_bhndb_methods,
182    sizeof(struct bcma_softc), bhnd_bhndb_driver, bcma_driver);
183
184DRIVER_MODULE(bcma_bhndb, bhndb, bcma_bhndb_driver, bhnd_devclass, NULL, NULL);
185
186MODULE_VERSION(bcma_bhndb, 1);
187MODULE_DEPEND(bcma_bhndb, bcma, 1, 1, 1);
188MODULE_DEPEND(bcma_bhndb, bhnd, 1, 1, 1);
189MODULE_DEPEND(bcma_bhndb, bhndb, 1, 1, 1);
190