The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@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 unmodified, this list of conditions, and the following
   10  *    disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/10.3/sys/mips/atheros/ar71xx_ohci.c 278278 2015-02-05 20:03:02Z hselasky $");
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/bus.h>
   34 #include <sys/rman.h>
   35 #include <sys/condvar.h>
   36 #include <sys/kernel.h>
   37 #include <sys/module.h>
   38 
   39 #include <dev/usb/usb.h>
   40 #include <dev/usb/usbdi.h>
   41 
   42 #include <dev/usb/usb_core.h>
   43 #include <dev/usb/usb_busdma.h>
   44 #include <dev/usb/usb_process.h>
   45 #include <dev/usb/usb_util.h>
   46 
   47 #include <dev/usb/usb_controller.h>
   48 #include <dev/usb/usb_bus.h>
   49 #include <dev/usb/controller/ohci.h>
   50 #include <dev/usb/controller/ohcireg.h>
   51 
   52 static int ar71xx_ohci_attach(device_t dev);
   53 static int ar71xx_ohci_detach(device_t dev);
   54 static int ar71xx_ohci_probe(device_t dev);
   55 
   56 struct ar71xx_ohci_softc
   57 {
   58         struct ohci_softc sc_ohci;
   59 };
   60 
   61 static int
   62 ar71xx_ohci_probe(device_t dev)
   63 {
   64         device_set_desc(dev, "AR71XX integrated OHCI controller");
   65         return (BUS_PROBE_DEFAULT);
   66 }
   67 
   68 static int
   69 ar71xx_ohci_attach(device_t dev)
   70 {
   71         struct ar71xx_ohci_softc *sc = device_get_softc(dev);
   72         int err;
   73         int rid;
   74 
   75         /* initialise some bus fields */
   76         sc->sc_ohci.sc_bus.parent = dev;
   77         sc->sc_ohci.sc_bus.devices = sc->sc_ohci.sc_devices;
   78         sc->sc_ohci.sc_bus.devices_max = OHCI_MAX_DEVICES;
   79         sc->sc_ohci.sc_bus.dma_bits = 32;
   80 
   81         /* get all DMA memory */
   82         if (usb_bus_mem_alloc_all(&sc->sc_ohci.sc_bus,
   83             USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) {
   84                 return (ENOMEM);
   85         }
   86 
   87         sc->sc_ohci.sc_dev = dev;
   88 
   89         rid = 0;
   90         sc->sc_ohci.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
   91             RF_ACTIVE);
   92         if (sc->sc_ohci.sc_io_res == NULL) {
   93                 err = ENOMEM;
   94                 goto error;
   95         }
   96         sc->sc_ohci.sc_io_tag = rman_get_bustag(sc->sc_ohci.sc_io_res);
   97         sc->sc_ohci.sc_io_hdl = rman_get_bushandle(sc->sc_ohci.sc_io_res);
   98         sc->sc_ohci.sc_io_size = rman_get_size(sc->sc_ohci.sc_io_res);
   99 
  100         rid = 0;
  101         sc->sc_ohci.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
  102             RF_ACTIVE);
  103         if (sc->sc_ohci.sc_irq_res == NULL) {
  104                 err = ENOMEM;
  105                 goto error;
  106         }
  107         sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usbus", -1);
  108         if (sc->sc_ohci.sc_bus.bdev == NULL) {
  109                 err = ENOMEM;
  110                 goto error;
  111         }
  112         device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus);
  113 
  114         err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res, 
  115             INTR_TYPE_BIO | INTR_MPSAFE, NULL, 
  116             (driver_intr_t *)ohci_interrupt, sc, &sc->sc_ohci.sc_intr_hdl);
  117         if (err) {
  118                 err = ENXIO;
  119                 goto error;
  120         }
  121 
  122         strlcpy(sc->sc_ohci.sc_vendor, "Atheros", sizeof(sc->sc_ohci.sc_vendor));
  123 
  124         bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, OHCI_CONTROL, 0);
  125 
  126         err = ohci_init(&sc->sc_ohci);
  127         if (!err)
  128                 err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev);
  129 
  130         if (err)
  131                 goto error;
  132         return (0);
  133 
  134 error:
  135         if (err) {
  136                 ar71xx_ohci_detach(dev);
  137                 return (err);
  138         }
  139         return (err);
  140 }
  141 
  142 static int
  143 ar71xx_ohci_detach(device_t dev)
  144 {
  145         struct ar71xx_ohci_softc *sc = device_get_softc(dev);
  146         device_t bdev;
  147 
  148         if (sc->sc_ohci.sc_bus.bdev) {
  149                 bdev = sc->sc_ohci.sc_bus.bdev;
  150                 device_detach(bdev);
  151                 device_delete_child(dev, bdev);
  152         }
  153         /* during module unload there are lots of children leftover */
  154         device_delete_children(dev);
  155 
  156         /*
  157          * Put the controller into reset, then disable clocks and do
  158          * the MI tear down.  We have to disable the clocks/hardware
  159          * after we do the rest of the teardown.  We also disable the
  160          * clocks in the opposite order we acquire them, but that
  161          * doesn't seem to be absolutely necessary.  We free up the
  162          * clocks after we disable them, so the system could, in
  163          * theory, reuse them.
  164          */
  165         bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl,
  166             OHCI_CONTROL, 0);
  167 
  168         if (sc->sc_ohci.sc_intr_hdl) {
  169                 bus_teardown_intr(dev, sc->sc_ohci.sc_irq_res, sc->sc_ohci.sc_intr_hdl);
  170                 sc->sc_ohci.sc_intr_hdl = NULL;
  171         }
  172 
  173         if (sc->sc_ohci.sc_irq_res && sc->sc_ohci.sc_intr_hdl) {
  174                 /*
  175                  * only call ohci_detach() after ohci_init()
  176                  */
  177                 ohci_detach(&sc->sc_ohci);
  178 
  179                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.sc_irq_res);
  180                 sc->sc_ohci.sc_irq_res = NULL;
  181         }
  182         if (sc->sc_ohci.sc_io_res) {
  183                 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_ohci.sc_io_res);
  184                 sc->sc_ohci.sc_io_res = NULL;
  185                 sc->sc_ohci.sc_io_tag = 0;
  186                 sc->sc_ohci.sc_io_hdl = 0;
  187         }
  188         usb_bus_mem_free_all(&sc->sc_ohci.sc_bus, &ohci_iterate_hw_softc);
  189 
  190         return (0);
  191 }
  192 
  193 static device_method_t ohci_methods[] = {
  194         /* Device interface */
  195         DEVMETHOD(device_probe, ar71xx_ohci_probe),
  196         DEVMETHOD(device_attach, ar71xx_ohci_attach),
  197         DEVMETHOD(device_detach, ar71xx_ohci_detach),
  198         DEVMETHOD(device_suspend, bus_generic_suspend),
  199         DEVMETHOD(device_resume, bus_generic_resume),
  200         DEVMETHOD(device_shutdown, bus_generic_shutdown),
  201 
  202         DEVMETHOD_END
  203 };
  204 
  205 static driver_t ohci_driver = {
  206         .name = "ohci",
  207         .methods = ohci_methods,
  208         .size = sizeof(struct ar71xx_ohci_softc),
  209 };
  210 
  211 static devclass_t ohci_devclass;
  212 
  213 DRIVER_MODULE(ohci, apb, ohci_driver, ohci_devclass, 0, 0);

Cache object: 7438b12c896a0144522c3bb0b45560c6


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