2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2018 Rubicon Communications, LLC (Netgate)
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
38 #include <machine/bus.h>
40 #include <dev/fdt/simplebus.h>
42 #include <dev/ofw/ofw_bus.h>
43 #include <dev/ofw/ofw_bus_subr.h>
45 struct simple_mfd_softc {
46 struct simplebus_softc sc;
49 device_t simple_mfd_add_device(device_t dev, phandle_t node, u_int order,
50 const char *name, int unit, struct simplebus_devinfo *di);
51 struct simplebus_devinfo *simple_mfd_setup_dinfo(device_t dev, phandle_t node, struct simplebus_devinfo *di);
54 simple_mfd_probe(device_t dev)
57 if (!ofw_bus_status_okay(dev))
59 if (!ofw_bus_is_compatible(dev, "simple-mfd"))
62 device_set_desc(dev, "Simple MFD (Multi-Functions Device)");
64 return (BUS_PROBE_GENERIC);
68 simple_mfd_attach(device_t dev)
70 struct simple_mfd_softc *sc;
71 phandle_t node, child;
74 sc = device_get_softc(dev);
75 node = ofw_bus_get_node(dev);
77 /* Parse address-cells and size-cells from the parent node as a fallback */
78 if (OF_getencprop(node, "#address-cells", &sc->sc.acells,
79 sizeof(sc->sc.acells)) == -1) {
80 if (OF_getencprop(OF_parent(node), "#address-cells", &sc->sc.acells,
81 sizeof(sc->sc.acells)) == -1) {
85 if (OF_getencprop(node, "#size-cells", &sc->sc.scells,
86 sizeof(sc->sc.scells)) == -1) {
87 if (OF_getencprop(OF_parent(node), "#size-cells", &sc->sc.scells,
88 sizeof(sc->sc.scells)) == -1) {
93 /* If the node has a ranges prop, parse it so children mapping will be done correctly */
94 if (OF_hasprop(node, "ranges")) {
95 if (simplebus_fill_ranges(node, &sc->sc) < 0) {
96 device_printf(dev, "could not get ranges\n");
101 /* Attach child devices */
102 for (child = OF_child(node); child > 0; child = OF_peer(child)) {
103 cdev = simple_mfd_add_device(dev, child, 0, NULL, -1, NULL);
105 device_probe_and_attach(cdev);
108 return (bus_generic_attach(dev));
111 struct simplebus_devinfo *
112 simple_mfd_setup_dinfo(device_t dev, phandle_t node,
113 struct simplebus_devinfo *di)
115 struct simplebus_softc *sc;
116 struct simplebus_devinfo *ndi;
118 sc = device_get_softc(dev);
120 ndi = malloc(sizeof(*ndi), M_DEVBUF, M_WAITOK | M_ZERO);
123 if (ofw_bus_gen_setup_devinfo(&ndi->obdinfo, node) != 0) {
129 /* reg resources is from the parent but interrupts is on the node itself */
130 resource_list_init(&ndi->rl);
131 ofw_bus_reg_to_rl(dev, OF_parent(node), sc->acells, sc->scells, &ndi->rl);
132 ofw_bus_intr_to_rl(dev, node, &ndi->rl, NULL);
138 simple_mfd_add_device(device_t dev, phandle_t node, u_int order,
139 const char *name, int unit, struct simplebus_devinfo *di)
141 struct simplebus_devinfo *ndi;
144 if ((ndi = simple_mfd_setup_dinfo(dev, node, di)) == NULL)
146 cdev = device_add_child_ordered(dev, order, name, unit);
148 device_printf(dev, "<%s>: device_add_child failed\n",
149 ndi->obdinfo.obd_name);
150 resource_list_free(&ndi->rl);
151 ofw_bus_gen_destroy_devinfo(&ndi->obdinfo);
156 device_set_ivars(cdev, ndi);
161 static device_method_t simple_mfd_methods[] = {
162 /* Device interface */
163 DEVMETHOD(device_probe, simple_mfd_probe),
164 DEVMETHOD(device_attach, simple_mfd_attach),
169 DEFINE_CLASS_1(simple_mfd, simple_mfd_driver, simple_mfd_methods,
170 sizeof(struct simple_mfd_softc), simplebus_driver);
172 static devclass_t simple_mfd_devclass;
174 EARLY_DRIVER_MODULE(simple_mfd, simplebus, simple_mfd_driver,
175 simple_mfd_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_LATE);
176 MODULE_VERSION(simple_mfd, 1);