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