2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
3 * Copyright (c) 2014 The FreeBSD Foundation
6 * This software was developed by SRI International and the University of
7 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
8 * ("CTSRD"), as part of the DARPA CRASH research programme.
10 * Portions of this software were developed by Andrew Turner
11 * under sponsorship from the FreeBSD Foundation.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * VirtIO MMIO interface.
37 * This driver is heavily based on VirtIO PCI interface driver.
43 * compatible = "virtio,mmio";
44 * reg = <0x1000 0x100>;
46 * interrupt-parent = <&GIC>;
50 #include "opt_platform.h"
52 #include <sys/cdefs.h>
53 __FBSDID("$FreeBSD$");
55 #include <sys/param.h>
56 #include <sys/systm.h>
58 #include <sys/kernel.h>
59 #include <sys/module.h>
61 #include <dev/fdt/fdt_common.h>
62 #include <dev/ofw/openfirm.h>
63 #include <dev/ofw/ofw_bus.h>
64 #include <dev/ofw/ofw_bus_subr.h>
66 #include <dev/virtio/mmio/virtio_mmio.h>
68 static int vtmmio_fdt_probe(device_t);
69 static int vtmmio_fdt_attach(device_t);
71 static device_method_t vtmmio_fdt_methods[] = {
72 /* Device interface. */
73 DEVMETHOD(device_probe, vtmmio_fdt_probe),
74 DEVMETHOD(device_attach, vtmmio_fdt_attach),
79 DEFINE_CLASS_1(virtio_mmio, vtmmio_fdt_driver, vtmmio_fdt_methods,
80 sizeof(struct vtmmio_softc), vtmmio_driver);
82 static devclass_t vtmmio_fdt_devclass;
84 DRIVER_MODULE(virtio_mmio, simplebus, vtmmio_fdt_driver, vtmmio_fdt_devclass,
86 DRIVER_MODULE(virtio_mmio, ofwbus, vtmmio_fdt_driver, vtmmio_fdt_devclass, 0,0);
87 MODULE_DEPEND(virtio_mmio, simplebus, 1, 1, 1);
88 MODULE_DEPEND(virtio_mmio, virtio, 1, 1, 1);
91 vtmmio_fdt_probe(device_t dev)
94 if (!ofw_bus_status_okay(dev))
97 if (!ofw_bus_is_compatible(dev, "virtio,mmio"))
100 device_set_desc(dev, "VirtIO MMIO adapter");
101 return (BUS_PROBE_DEFAULT);
105 vtmmio_setup_platform(device_t dev, struct vtmmio_softc *sc)
107 phandle_t platform_node;
114 if ((node = ofw_bus_get_node(dev)) == -1)
117 if (OF_searchencprop(node, "platform", &xref,
118 sizeof(xref)) == -1) {
122 platform_node = OF_node_from_xref(xref);
124 SLIST_FOREACH(ic, &fdt_ic_list_head, fdt_ics) {
125 if (ic->iph == platform_node) {
126 sc->platform = ic->dev;
131 if (sc->platform == NULL) {
132 /* No platform-specific device. Ignore it. */
139 vtmmio_fdt_attach(device_t dev)
141 struct vtmmio_softc *sc;
143 sc = device_get_softc(dev);
144 vtmmio_setup_platform(dev, sc);
146 return (vtmmio_attach(dev));