diff options
Diffstat (limited to 'sys/arm/freescale/imx/imx_nop_usbphy.c')
| -rw-r--r-- | sys/arm/freescale/imx/imx_nop_usbphy.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/sys/arm/freescale/imx/imx_nop_usbphy.c b/sys/arm/freescale/imx/imx_nop_usbphy.c new file mode 100644 index 000000000000..49bebfcd5739 --- /dev/null +++ b/sys/arm/freescale/imx/imx_nop_usbphy.c @@ -0,0 +1,121 @@ +/*- + * Copyright (c) 2013 Ian Lepore <ian@freebsd.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * USBPHY "no-op" driver for Freescale family of SoCs. This driver is used on + * SoCs which have usbphy hardware whose clocks need to be enabled, but no other + * action has to be taken to make the hardware work. + */ + +#include "opt_bus.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/bus.h> +#include <sys/rman.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <machine/bus.h> + +#include <arm/freescale/imx/imx_ccmvar.h> + +/* + * Table of supported FDT compat strings. + */ +static struct ofw_compat_data compat_data[] = { + {"nop-usbphy", true}, + {"usb-nop-xceiv", true}, + {NULL, false}, +}; + +struct usbphy_softc { + device_t dev; + u_int phy_num; +}; + +static int +usbphy_detach(device_t dev) +{ + + return (0); +} + +static int +usbphy_attach(device_t dev) +{ + struct usbphy_softc *sc; + + sc = device_get_softc(dev); + + /* + * Turn on the phy clocks. + */ + imx_ccm_usbphy_enable(dev); + + return (0); +} + +static int +usbphy_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) { + device_set_desc(dev, "Freescale USB PHY"); + return (BUS_PROBE_DEFAULT); + } + + return (ENXIO); +} + +static device_method_t usbphy_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, usbphy_probe), + DEVMETHOD(device_attach, usbphy_attach), + DEVMETHOD(device_detach, usbphy_detach), + + DEVMETHOD_END +}; + +static driver_t usbphy_driver = { + "usbphy", + usbphy_methods, + sizeof(struct usbphy_softc) +}; + +static devclass_t usbphy_devclass; + +DRIVER_MODULE(usbphy, simplebus, usbphy_driver, usbphy_devclass, 0, 0); + |