dwc_otg_acpi.c

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/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2012 Hans Petter Selasky.
 *
 * 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("$FreeBSD$");
 
#include "opt_acpi.h"
 
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/condvar.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/rman.h>
 
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
 
#include <dev/acpica/acpivar.h>
 
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
 
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_util.h>
 
#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_bus.h>
 
#include <dev/usb/controller/dwc_otg.h>
 
static device_probe_t dwc_otg_probe;
static device_attach_t dwc_otg_attach;
static device_attach_t dwc_otg_detach;
 
static char *dwc_otg_ids[] = {
        "BCM2848",
        NULL
};
 
static int
dwc_otg_probe(device_t dev)
{
        int rv;
 
        if (acpi_disabled("dwc_otg"))
                return (ENXIO);
 
        rv = ACPI_ID_PROBE(device_get_parent(dev), dev, dwc_otg_ids, NULL);
        if (rv > 0)
                return (rv);
 
        device_set_desc(dev, "DWC OTG 2.0 integrated USB controller");
 
        return (BUS_PROBE_DEFAULT);
}
 
static int
dwc_otg_attach(device_t dev)
{
        struct dwc_otg_softc *sc = device_get_softc(dev);
        int err;
        int rid;
 
        sc->sc_bus.parent = dev;
 
        /* assume device mode (this is only used for the Raspberry Pi 4's
         * USB-C port, which only works in device mode) */
        sc->sc_mode = DWC_MODE_DEVICE;
 
        rid = 0;
        sc->sc_io_res =
            bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
 
        if (sc->sc_io_res == NULL)
                goto error;
 
        rid = 0;
        sc->sc_irq_res =
            bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
        if (sc->sc_irq_res == NULL)
                goto error;
 
        err = dwc_otg_init(sc);
        if (err == 0) {
                err = device_probe_and_attach(sc->sc_bus.bdev);
        }
        if (err)
                goto error;
 
        return (0);
 
error:
        dwc_otg_detach(dev);
        return (ENXIO);
}
 
static int
dwc_otg_detach(device_t dev)
{
        struct dwc_otg_softc *sc = device_get_softc(dev);
 
        /* during module unload there are lots of children leftover */
        device_delete_children(dev);
 
        if (sc->sc_irq_res && sc->sc_intr_hdl) {
                /*
                 * only call dwc_otg_uninit() after dwc_otg_init()
                 */
                dwc_otg_uninit(sc);
 
                bus_teardown_intr(dev, sc->sc_irq_res,
                    sc->sc_intr_hdl);
                sc->sc_intr_hdl = NULL;
        }
        /* free IRQ channel, if any */
        if (sc->sc_irq_res) {
                bus_release_resource(dev, SYS_RES_IRQ, 0,
                    sc->sc_irq_res);
                sc->sc_irq_res = NULL;
        }
        /* free memory resource, if any */
        if (sc->sc_io_res) {
                bus_release_resource(dev, SYS_RES_MEMORY, 0,
                    sc->sc_io_res);
                sc->sc_io_res = NULL;
        }
        usb_bus_mem_free_all(&sc->sc_bus, NULL);
 
        return (0);
}
 
static device_method_t dwc_otg_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe, dwc_otg_probe),
        DEVMETHOD(device_attach, dwc_otg_attach),
        DEVMETHOD(device_detach, dwc_otg_detach),
        DEVMETHOD(device_suspend, bus_generic_suspend),
        DEVMETHOD(device_resume, bus_generic_resume),
        DEVMETHOD(device_shutdown, bus_generic_shutdown),
 
        DEVMETHOD_END
};
 
static driver_t dwc_otg_driver = {
        .name = "dwcotg",
        .methods = dwc_otg_methods,
        .size = sizeof(struct dwc_otg_softc),
};
 
static devclass_t dwc_otg_devclass;
 
DRIVER_MODULE(dwcotg, acpi, dwc_otg_driver, dwc_otg_devclass, 0, 0);
MODULE_DEPEND(dwcotg, usb, 1, 1, 1);