1/*-
2 * Copyright (c) 2016 Michael Zhilin <mizhka@gmail.com>
3 * Copyright (c) 2015-2016 Landon Fuller <landon@freebsd.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer,
11 * without modification.

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21 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
23 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
26 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGES.
29 *
30 * $FreeBSD: head/sys/dev/bhnd/bcma/bcma_nexus.c 301410 2016-06-04 19:53:47Z landonf $
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/dev/bhnd/bcma/bcma_nexus.c 301410 2016-06-04 19:53:47Z landonf $");
35
36#include <sys/param.h>
37#include <sys/kernel.h>
38#include <sys/bus.h>
39#include <sys/module.h>
40
41#include <machine/bus.h>
42#include <sys/rman.h>
43#include <machine/resource.h>
44
45#include <dev/bhnd/bhnd_ids.h>
46#include <dev/bhnd/bhnd_nexusvar.h>
47#include <dev/bhnd/cores/chipc/chipcreg.h>
48
49#include "bcmavar.h"
50#include "bcma_eromreg.h"
51
52/*
53 * Supports bcma(4) attachment to a nexus bus.
54 */
55
56static int bcma_nexus_attach(device_t);
57static int bcma_nexus_probe(device_t);
58
59struct bcma_nexus_softc {
60 struct bcma_softc parent_sc;
61 struct bhnd_chipid bcma_cid;
62};
63
64static int
65bcma_nexus_probe(device_t dev)
66{
67 struct bcma_nexus_softc *sc;
68 int error;
69
70 sc = device_get_softc(dev);
71
72 /* Read the ChipCommon info using the hints the kernel
73 * was compiled with. */
74 if ((error = bhnd_nexus_read_chipid(dev, &sc->bcma_cid)))
75 return (error);
76
77 if (sc->bcma_cid.chip_type != BHND_CHIPTYPE_BCMA)
78 return (ENXIO);
79
80 if ((error = bcma_probe(dev)) > 0) {
81 device_printf(dev, "error %d in probe\n", error);
82 return (error);
83 }
84
85 return (0);
86}
87
88static int
89bcma_nexus_attach(device_t dev)
90{
91 struct bcma_nexus_softc *sc;
92 struct resource *erom_res;
93 int error;
94 int rid;
95
96 sc = device_get_softc(dev);
97
98 /* Map the EROM resource and enumerate the bus. */
99 rid = 0;
100 erom_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
101 sc->bcma_cid.enum_addr,
102 sc->bcma_cid.enum_addr + BCMA_EROM_TABLE_SIZE,
103 BCMA_EROM_TABLE_SIZE, RF_ACTIVE);
104 if (erom_res == NULL) {
105 device_printf(dev, "failed to allocate EROM resource\n");
106 return (ENXIO);
107 }
108
109 error = bcma_add_children(dev, erom_res, BCMA_EROM_TABLE_START);
110 bus_release_resource(dev, SYS_RES_MEMORY, rid, erom_res);
111
112 if (error)
113 return (error);
114
115 return (bcma_attach(dev));
116}
117
118static const struct bhnd_chipid *
119bcma_nexus_get_chipid(device_t dev, device_t child) {
120 struct bcma_nexus_softc *sc = device_get_softc(dev);
121 return (&sc->bcma_cid);
122}
123
124static device_method_t bcma_nexus_methods[] = {
125 /* Device interface */
126 DEVMETHOD(device_probe, bcma_nexus_probe),
127 DEVMETHOD(device_attach, bcma_nexus_attach),
128
129 /* bhnd interface */
130 DEVMETHOD(bhnd_bus_get_chipid, bcma_nexus_get_chipid),
131
132 DEVMETHOD_END
133};
134
135DEFINE_CLASS_2(bhnd, bcma_nexus_driver, bcma_nexus_methods,
136 sizeof(struct bcma_nexus_softc), bhnd_nexus_driver, bcma_driver);
137
138DRIVER_MODULE(bcma_nexus, nexus, bcma_nexus_driver, bhnd_devclass, 0, 0);