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
28 #include "opt_platform.h"
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/conf.h>
34 #include <sys/kernel.h>
35 #include <sys/lock.h>
36 #include <sys/mbuf.h>
37 #include <sys/malloc.h>
38 #include <sys/module.h>
39 #include <sys/mutex.h>
40 #include <sys/rman.h>
41 #include <machine/bus.h>
42
43 #ifdef FDT
44 #include <dev/ofw/ofw_bus.h>
45 #include <dev/ofw/ofw_bus_subr.h>
46 #endif
47
48 struct opal_i2cm_softc
49 {
50
51 };
52
53 static int opal_i2cm_attach(device_t);
54 static int opal_i2cm_probe(device_t);
55 static const struct ofw_bus_devinfo *
56 opal_i2cm_get_devinfo(device_t, device_t);
57
58 static device_method_t opal_i2cm_methods[] = {
59 /* Device interface */
60 DEVMETHOD(device_probe, opal_i2cm_probe),
61 DEVMETHOD(device_attach, opal_i2cm_attach),
62
63 /* ofw_bus interface */
64 DEVMETHOD(ofw_bus_get_devinfo, opal_i2cm_get_devinfo),
65 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
66 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
67 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
68 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
69 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
70
71 DEVMETHOD_END
72 };
73
74 static int
opal_i2cm_probe(device_t dev)75 opal_i2cm_probe(device_t dev)
76 {
77
78 if (!(ofw_bus_is_compatible(dev, "ibm,centaur-i2cm") ||
79 ofw_bus_is_compatible(dev, "ibm,power8-i2cm")))
80 return (ENXIO);
81
82 device_set_desc(dev, "centaur-i2cm");
83 return (0);
84 }
85
86 static int
opal_i2cm_attach(device_t dev)87 opal_i2cm_attach(device_t dev)
88 {
89 phandle_t child;
90 device_t cdev;
91 struct ofw_bus_devinfo *dinfo;
92
93 for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
94 child = OF_peer(child)) {
95 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
96 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
97 free(dinfo, M_DEVBUF);
98 continue;
99 }
100 cdev = device_add_child(dev, NULL, DEVICE_UNIT_ANY);
101 if (cdev == NULL) {
102 device_printf(dev, "<%s>: device_add_child failed\n",
103 dinfo->obd_name);
104 ofw_bus_gen_destroy_devinfo(dinfo);
105 free(dinfo, M_DEVBUF);
106 continue;
107 }
108 device_set_ivars(cdev, dinfo);
109 }
110
111 bus_attach_children(dev);
112 return (0);
113 }
114
115 static const struct ofw_bus_devinfo *
opal_i2cm_get_devinfo(device_t dev,device_t child)116 opal_i2cm_get_devinfo(device_t dev, device_t child)
117 {
118 return (device_get_ivars(child));
119 }
120
121 DEFINE_CLASS_0(opal_i2cm, opal_i2cm_driver, opal_i2cm_methods,
122 sizeof(struct opal_i2cm_softc));
123 DRIVER_MODULE(opal_i2cm, powernv_xscom, opal_i2cm_driver, NULL, NULL);
124 DRIVER_MODULE(opal_i2cm, powernv_centaur, opal_i2cm_driver, NULL, NULL);
125