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 */
55static struct ofw_compat_data compat_data[] = {
56	{"nop-usbphy",		true},
57	{"usb-nop-xceiv",	true},
58	{NULL,		 	false},
59};
60
61struct usbphy_softc {
62	device_t	dev;
63	u_int		phy_num;
64};
65
66static int
67usbphy_detach(device_t dev)
68{
69
70	return (0);
71}
72
73static int
74usbphy_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
88static int
89usbphy_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
103static 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
112static driver_t usbphy_driver = {
113	"usbphy",
114	usbphy_methods,
115	sizeof(struct usbphy_softc)
116};
117
118static devclass_t usbphy_devclass;
119
120DRIVER_MODULE(usbphy, simplebus, usbphy_driver, usbphy_devclass, 0, 0);
121
122