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