FreeBSD/Linux Kernel Cross Reference
sys/mips/atheros/ar71xx_ohci.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@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 unmodified, 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 <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/rman.h>
    #include <sys/condvar.h>
    #include <sys/kernel.h>
    #include <sys/module.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/ohci.h>
    #include <dev/usb/controller/ohcireg.h>
    
    #include <mips/atheros/ar71xxreg.h> /* for stuff in ar71xx_cpudef.h */
    #include <mips/atheros/ar71xx_cpudef.h>
    
    static int ar71xx_ohci_attach(device_t dev);
    static int ar71xx_ohci_detach(device_t dev);
    static int ar71xx_ohci_probe(device_t dev);
    
    struct ar71xx_ohci_softc
    {
            struct ohci_softc sc_ohci;
    };
    
    static int
    ar71xx_ohci_probe(device_t dev)
    {
            device_set_desc(dev, "AR71XX integrated OHCI controller");
            return (BUS_PROBE_DEFAULT);
    }
    
    static void
    ar71xx_ohci_intr(void *arg)
    {
    
            /* XXX TODO: should really see if this was our interrupt.. */
            ar71xx_device_flush_ddr(AR71XX_CPU_DDR_FLUSH_USB);
            ohci_interrupt(arg);
    }
    
    
    static int
    ar71xx_ohci_attach(device_t dev)
    {
            struct ar71xx_ohci_softc *sc = device_get_softc(dev);
            int err;
            int rid;
    
            /* initialise some bus fields */
            sc->sc_ohci.sc_bus.parent = dev;
            sc->sc_ohci.sc_bus.devices = sc->sc_ohci.sc_devices;
            sc->sc_ohci.sc_bus.devices_max = OHCI_MAX_DEVICES;
            sc->sc_ohci.sc_bus.dma_bits = 32;
    
            /* get all DMA memory */
            if (usb_bus_mem_alloc_all(&sc->sc_ohci.sc_bus,
                USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) {
                    return (ENOMEM);
           }
   
           sc->sc_ohci.sc_dev = dev;
   
           rid = 0;
           sc->sc_ohci.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
               RF_ACTIVE);
           if (sc->sc_ohci.sc_io_res == NULL) {
                   err = ENOMEM;
                   goto error;
           }
           sc->sc_ohci.sc_io_tag = rman_get_bustag(sc->sc_ohci.sc_io_res);
           sc->sc_ohci.sc_io_hdl = rman_get_bushandle(sc->sc_ohci.sc_io_res);
           sc->sc_ohci.sc_io_size = rman_get_size(sc->sc_ohci.sc_io_res);
   
           rid = 0;
           sc->sc_ohci.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
               RF_ACTIVE);
           if (sc->sc_ohci.sc_irq_res == NULL) {
                   err = ENOMEM;
                   goto error;
           }
           sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usbus", -1);
           if (sc->sc_ohci.sc_bus.bdev == NULL) {
                   err = ENOMEM;
                   goto error;
           }
           device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus);
   
           err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res, 
               INTR_TYPE_BIO | INTR_MPSAFE, NULL, 
               ar71xx_ohci_intr, sc, &sc->sc_ohci.sc_intr_hdl);
           if (err) {
                   err = ENXIO;
                   goto error;
           }
   
           strlcpy(sc->sc_ohci.sc_vendor, "Atheros", sizeof(sc->sc_ohci.sc_vendor));
   
           bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, OHCI_CONTROL, 0);
   
           err = ohci_init(&sc->sc_ohci);
           if (!err)
                   err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev);
   
           if (err)
                   goto error;
           return (0);
   
   error:
           if (err) {
                   ar71xx_ohci_detach(dev);
                   return (err);
           }
           return (err);
   }
   
   static int
   ar71xx_ohci_detach(device_t dev)
   {
           struct ar71xx_ohci_softc *sc = device_get_softc(dev);
   
           /* during module unload there are lots of children leftover */
           device_delete_children(dev);
   
           /*
            * Put the controller into reset, then disable clocks and do
            * the MI tear down.  We have to disable the clocks/hardware
            * after we do the rest of the teardown.  We also disable the
            * clocks in the opposite order we acquire them, but that
            * doesn't seem to be absolutely necessary.  We free up the
            * clocks after we disable them, so the system could, in
            * theory, reuse them.
            */
           bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl,
               OHCI_CONTROL, 0);
   
           if (sc->sc_ohci.sc_intr_hdl) {
                   bus_teardown_intr(dev, sc->sc_ohci.sc_irq_res, sc->sc_ohci.sc_intr_hdl);
                   sc->sc_ohci.sc_intr_hdl = NULL;
           }
   
           if (sc->sc_ohci.sc_irq_res && sc->sc_ohci.sc_intr_hdl) {
                   /*
                    * only call ohci_detach() after ohci_init()
                    */
                   ohci_detach(&sc->sc_ohci);
   
                   bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.sc_irq_res);
                   sc->sc_ohci.sc_irq_res = NULL;
           }
           if (sc->sc_ohci.sc_io_res) {
                   bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_ohci.sc_io_res);
                   sc->sc_ohci.sc_io_res = NULL;
                   sc->sc_ohci.sc_io_tag = 0;
                   sc->sc_ohci.sc_io_hdl = 0;
           }
           usb_bus_mem_free_all(&sc->sc_ohci.sc_bus, &ohci_iterate_hw_softc);
   
           return (0);
   }
   
   static device_method_t ohci_methods[] = {
           /* Device interface */
           DEVMETHOD(device_probe, ar71xx_ohci_probe),
           DEVMETHOD(device_attach, ar71xx_ohci_attach),
           DEVMETHOD(device_detach, ar71xx_ohci_detach),
           DEVMETHOD(device_suspend, bus_generic_suspend),
           DEVMETHOD(device_resume, bus_generic_resume),
           DEVMETHOD(device_shutdown, bus_generic_shutdown),
   
           DEVMETHOD_END
   };
   
   static driver_t ohci_driver = {
           .name = "ohci",
           .methods = ohci_methods,
           .size = sizeof(struct ar71xx_ohci_softc),
   };
   
   static devclass_t ohci_devclass;
   
   DRIVER_MODULE(ohci, apb, ohci_driver, ohci_devclass, 0, 0);

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