1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2019 Emmanuel Vadot <manu@FreeBSD.Org>
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 /*
29 * Rockchip DWC3 glue
30 */
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/bus.h>
35 #include <sys/rman.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
38 #include <sys/gpio.h>
39 #include <machine/bus.h>
40
41 #include <dev/fdt/simplebus.h>
42
43 #include <dev/fdt/fdt_common.h>
44 #include <dev/ofw/ofw_bus.h>
45 #include <dev/ofw/ofw_bus_subr.h>
46 #include <dev/ofw/ofw_subr.h>
47
48 #include <dev/clk/clk.h>
49 #include <dev/hwreset/hwreset.h>
50 #include <dev/phy/phy_usb.h>
51
52 static struct ofw_compat_data compat_data[] = {
53 { "allwinner,sun50i-h6-dwc3", 1 },
54 { NULL, 0 }
55 };
56
57 struct aw_dwc3_softc {
58 struct simplebus_softc sc;
59 device_t dev;
60 clk_t clk_bus;
61 hwreset_t rst_bus;
62 };
63
64 static int
aw_dwc3_probe(device_t dev)65 aw_dwc3_probe(device_t dev)
66 {
67 phandle_t node;
68
69 if (!ofw_bus_status_okay(dev))
70 return (ENXIO);
71
72 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
73 return (ENXIO);
74
75 /* Binding says that we need a child node for the actual dwc3 controller */
76 node = ofw_bus_get_node(dev);
77 if (OF_child(node) <= 0)
78 return (ENXIO);
79
80 device_set_desc(dev, "Allwinner H6 DWC3");
81 return (BUS_PROBE_DEFAULT);
82 }
83
84 static int
aw_dwc3_attach(device_t dev)85 aw_dwc3_attach(device_t dev)
86 {
87 struct aw_dwc3_softc *sc;
88 device_t cdev;
89 phandle_t node, child;
90 int err;
91
92 sc = device_get_softc(dev);
93 sc->dev = dev;
94 node = ofw_bus_get_node(dev);
95
96 /* Enable the clocks */
97 if (clk_get_by_ofw_name(dev, 0, "bus", &sc->clk_bus) != 0) {
98 device_printf(dev, "Cannot get bus clock\n");
99 return (ENXIO);
100 }
101 err = clk_enable(sc->clk_bus);
102 if (err != 0) {
103 device_printf(dev, "Could not enable clock %s\n",
104 clk_get_name(sc->clk_bus));
105 return (ENXIO);
106 }
107
108 /* Put module out of reset */
109 if (hwreset_get_by_ofw_name(dev, node, "bus", &sc->rst_bus) == 0) {
110 if (hwreset_deassert(sc->rst_bus) != 0) {
111 device_printf(dev, "Cannot deassert reset\n");
112 return (ENXIO);
113 }
114 }
115
116 simplebus_init(dev, node);
117 if (simplebus_fill_ranges(node, &sc->sc) < 0) {
118 device_printf(dev, "could not get ranges\n");
119 return (ENXIO);
120 }
121
122 for (child = OF_child(node); child > 0; child = OF_peer(child)) {
123 cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL);
124 if (cdev != NULL)
125 device_probe_and_attach(cdev);
126 }
127
128 bus_attach_children(dev);
129 return (0);
130 }
131
132 static device_method_t aw_dwc3_methods[] = {
133 /* Device interface */
134 DEVMETHOD(device_probe, aw_dwc3_probe),
135 DEVMETHOD(device_attach, aw_dwc3_attach),
136
137 DEVMETHOD_END
138 };
139
140 DEFINE_CLASS_1(aw_dwc3, aw_dwc3_driver, aw_dwc3_methods,
141 sizeof(struct aw_dwc3_softc), simplebus_driver);
142 DRIVER_MODULE(aw_dwc3, simplebus, aw_dwc3_driver, 0, 0);
143