1 /*-
2 * Copyright (c) 2017-2018 QCM Technologies.
3 * Copyright (c) 2017-2018 Semihalf.
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 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: stable/12/sys/powerpc/powernv/opal_i2cm.c 330971 2018-03-15 06:19:45Z wma $
28 */
29
30 #include "opt_platform.h"
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD: stable/12/sys/powerpc/powernv/opal_i2cm.c 330971 2018-03-15 06:19:45Z wma $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/bus.h>
38 #include <sys/conf.h>
39 #include <sys/kernel.h>
40 #include <sys/lock.h>
41 #include <sys/mbuf.h>
42 #include <sys/malloc.h>
43 #include <sys/module.h>
44 #include <sys/mutex.h>
45 #include <sys/rman.h>
46 #include <machine/bus.h>
47
48 #ifdef FDT
49 #include <dev/ofw/ofw_bus.h>
50 #include <dev/ofw/ofw_bus_subr.h>
51 #endif
52
53 struct opal_i2cm_softc
54 {
55
56 };
57
58 static int opal_i2cm_attach(device_t);
59 static int opal_i2cm_probe(device_t);
60 static const struct ofw_bus_devinfo *
61 opal_i2cm_get_devinfo(device_t, device_t);
62
63 static device_method_t opal_i2cm_methods[] = {
64 /* Device interface */
65 DEVMETHOD(device_probe, opal_i2cm_probe),
66 DEVMETHOD(device_attach, opal_i2cm_attach),
67
68 /* ofw_bus interface */
69 DEVMETHOD(ofw_bus_get_devinfo, opal_i2cm_get_devinfo),
70 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
71 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
72 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
73 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
74 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
75
76 DEVMETHOD_END
77 };
78
79 static devclass_t opal_i2cm_devclass;
80
81 static int
opal_i2cm_probe(device_t dev)82 opal_i2cm_probe(device_t dev)
83 {
84
85 if (!(ofw_bus_is_compatible(dev, "ibm,centaur-i2cm") ||
86 ofw_bus_is_compatible(dev, "ibm,power8-i2cm")))
87 return (ENXIO);
88
89 device_set_desc(dev, "centaur-i2cm");
90 return (0);
91 }
92
93 static int
opal_i2cm_attach(device_t dev)94 opal_i2cm_attach(device_t dev)
95 {
96 phandle_t child;
97 device_t cdev;
98 struct ofw_bus_devinfo *dinfo;
99
100 for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
101 child = OF_peer(child)) {
102 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
103 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
104 free(dinfo, M_DEVBUF);
105 continue;
106 }
107 cdev = device_add_child(dev, NULL, -1);
108 if (cdev == NULL) {
109 device_printf(dev, "<%s>: device_add_child failed\n",
110 dinfo->obd_name);
111 ofw_bus_gen_destroy_devinfo(dinfo);
112 free(dinfo, M_DEVBUF);
113 continue;
114 }
115 device_set_ivars(cdev, dinfo);
116 }
117
118 return (bus_generic_attach(dev));
119 }
120
121 static const struct ofw_bus_devinfo *
opal_i2cm_get_devinfo(device_t dev,device_t child)122 opal_i2cm_get_devinfo(device_t dev, device_t child)
123 {
124 return (device_get_ivars(child));
125 }
126
127 DEFINE_CLASS_0(opal_i2cm, opal_i2cm_driver, opal_i2cm_methods,
128 sizeof(struct opal_i2cm_softc));
129 DRIVER_MODULE(opal_i2cm, powernv_xscom, opal_i2cm_driver, opal_i2cm_devclass, NULL,
130 NULL);
131 DRIVER_MODULE(opal_i2cm, powernv_centaur, opal_i2cm_driver, opal_i2cm_devclass, NULL,
132 NULL);
133
134