1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2013 Ian Lepore <ian@freebsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32/*
33 * USBPHY "no-op" driver for Freescale family of SoCs.  This driver is used on
34 * SoCs which have usbphy hardware whose clocks need to be enabled, but no other
35 * action has to be taken to make the hardware work.
36 */
37
38#include "opt_bus.h"
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/module.h>
44#include <sys/bus.h>
45#include <sys/rman.h>
46
47#include <dev/ofw/ofw_bus.h>
48#include <dev/ofw/ofw_bus_subr.h>
49
50#include <machine/bus.h>
51
52#include <arm/freescale/imx/imx_ccmvar.h>
53
54/*
55 * Table of supported FDT compat strings.
56 */
57static struct ofw_compat_data compat_data[] = {
58	{"nop-usbphy",		true},
59	{"usb-nop-xceiv",	true},
60	{NULL,		 	false},
61};
62
63struct usbphy_softc {
64	device_t	dev;
65	u_int		phy_num;
66};
67
68static int
69usbphy_detach(device_t dev)
70{
71
72	return (0);
73}
74
75static int
76usbphy_attach(device_t dev)
77{
78	struct usbphy_softc *sc;
79
80	sc = device_get_softc(dev);
81
82	/*
83         * Turn on the phy clocks.
84         */
85	imx_ccm_usbphy_enable(dev);
86
87	return (0);
88}
89
90static int
91usbphy_probe(device_t dev)
92{
93
94	if (!ofw_bus_status_okay(dev))
95		return (ENXIO);
96
97	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {
98		device_set_desc(dev, "Freescale USB PHY");
99		return (BUS_PROBE_DEFAULT);
100	}
101
102	return (ENXIO);
103}
104
105static device_method_t usbphy_methods[] = {
106	/* Device interface */
107	DEVMETHOD(device_probe,  usbphy_probe),
108	DEVMETHOD(device_attach, usbphy_attach),
109	DEVMETHOD(device_detach, usbphy_detach),
110
111	DEVMETHOD_END
112};
113
114static driver_t usbphy_driver = {
115	"usbphy",
116	usbphy_methods,
117	sizeof(struct usbphy_softc)
118};
119
120static devclass_t usbphy_devclass;
121
122DRIVER_MODULE(usbphy, simplebus, usbphy_driver, usbphy_devclass, 0, 0);
123