bc9a95c8c6
phy clocks need to be enabled, but no other hardware setup is needed to make the phy work.
119 lines
3.0 KiB
C
119 lines
3.0 KiB
C
/*-
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* Copyright (c) 2013 Ian Lepore <ian@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* USBPHY "no-op" driver for Freescale family of SoCs. This driver is used on
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* SoCs which have usbphy hardware whose clocks need to be enabled, but no other
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* action has to be taken to make the hardware work.
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*/
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#include "opt_bus.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <machine/bus.h>
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#include <arm/freescale/imx/imx_machdep.h>
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/*
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* Table of supported FDT compat strings.
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*/
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static struct ofw_compat_data compat_data[] = {
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{"nop-usbphy", true},
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{"usb-nop-xceiv", true},
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{NULL, false},
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};
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struct usbphy_softc {
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device_t dev;
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u_int phy_num;
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};
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static int
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usbphy_detach(device_t dev)
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{
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return (0);
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}
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static int
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usbphy_attach(device_t dev)
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{
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struct usbphy_softc *sc;
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sc = device_get_softc(dev);
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/*
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* Turn on the phy clocks.
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*/
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imx_ccm_usbphy_enable(dev);
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return (0);
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}
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static int
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usbphy_probe(device_t dev)
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{
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if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {
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device_set_desc(dev, "Freescale USB PHY");
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return (BUS_PROBE_DEFAULT);
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}
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return (ENXIO);
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}
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static device_method_t usbphy_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, usbphy_probe),
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DEVMETHOD(device_attach, usbphy_attach),
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DEVMETHOD(device_detach, usbphy_detach),
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DEVMETHOD_END
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};
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static driver_t usbphy_driver = {
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"usbphy",
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usbphy_methods,
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sizeof(struct usbphy_softc)
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};
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static devclass_t usbphy_devclass;
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DRIVER_MODULE(usbphy, simplebus, usbphy_driver, usbphy_devclass, 0, 0);
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