1 /*-
2 * Copyright (c) 2013 Ian Lepore <ian@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 /*
31 * USBPHY "no-op" driver for Freescale family of SoCs. This driver is used on
32 * SoCs which have usbphy hardware whose clocks need to be enabled, but no other
33 * action has to be taken to make the hardware work.
34 */
35
36 #include "opt_bus.h"
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/module.h>
42 #include <sys/bus.h>
43 #include <sys/rman.h>
44
45 #include <dev/ofw/ofw_bus.h>
46 #include <dev/ofw/ofw_bus_subr.h>
47
48 #include <machine/bus.h>
49
50 #include <arm/freescale/imx/imx_ccmvar.h>
51
52 /*
53 * Table of supported FDT compat strings.
54 */
55 static struct ofw_compat_data compat_data[] = {
56 {"nop-usbphy", true},
57 {"usb-nop-xceiv", true},
58 {NULL, false},
59 };
60
61 struct usbphy_softc {
62 device_t dev;
63 u_int phy_num;
64 };
65
66 static int
usbphy_detach(device_t dev)67 usbphy_detach(device_t dev)
68 {
69
70 return (0);
71 }
72
73 static int
usbphy_attach(device_t dev)74 usbphy_attach(device_t dev)
75 {
76 struct usbphy_softc *sc;
77
78 sc = device_get_softc(dev);
79
80 /*
81 * Turn on the phy clocks.
82 */
83 imx_ccm_usbphy_enable(dev);
84
85 return (0);
86 }
87
88 static int
usbphy_probe(device_t dev)89 usbphy_probe(device_t dev)
90 {
91
92 if (!ofw_bus_status_okay(dev))
93 return (ENXIO);
94
95 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {
96 device_set_desc(dev, "Freescale USB PHY");
97 return (BUS_PROBE_DEFAULT);
98 }
99
100 return (ENXIO);
101 }
102
103 static device_method_t usbphy_methods[] = {
104 /* Device interface */
105 DEVMETHOD(device_probe, usbphy_probe),
106 DEVMETHOD(device_attach, usbphy_attach),
107 DEVMETHOD(device_detach, usbphy_detach),
108
109 DEVMETHOD_END
110 };
111
112 static driver_t usbphy_driver = {
113 "usbphy",
114 usbphy_methods,
115 sizeof(struct usbphy_softc)
116 };
117
118 static devclass_t usbphy_devclass;
119
120 DRIVER_MODULE(usbphy, simplebus, usbphy_driver, usbphy_devclass, 0, 0);
121
122