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/9.0/sys/mips/atheros/ar71xx_ohci.c 223562 2011-06-26 10:07:48Z kevlo $");
   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 
   80         /* get all DMA memory */
   81         if (usb_bus_mem_alloc_all(&sc->sc_ohci.sc_bus,
   82             USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) {
   83                 return (ENOMEM);
   84         }
   85 
   86         sc->sc_ohci.sc_dev = dev;
   87 
   88         rid = 0;
   89         sc->sc_ohci.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
   90             RF_ACTIVE);
   91         if (sc->sc_ohci.sc_io_res == NULL) {
   92                 err = ENOMEM;
   93                 goto error;
   94         }
   95         sc->sc_ohci.sc_io_tag = rman_get_bustag(sc->sc_ohci.sc_io_res);
   96         sc->sc_ohci.sc_io_hdl = rman_get_bushandle(sc->sc_ohci.sc_io_res);
   97         sc->sc_ohci.sc_io_size = rman_get_size(sc->sc_ohci.sc_io_res);
   98 
   99         rid = 0;
  100         sc->sc_ohci.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
  101             RF_ACTIVE);
  102         if (sc->sc_ohci.sc_irq_res == NULL) {
  103                 err = ENOMEM;
  104                 goto error;
  105         }
  106         sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usbus", -1);
  107         if (sc->sc_ohci.sc_bus.bdev == NULL) {
  108                 err = ENOMEM;
  109                 goto error;
  110         }
  111         device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus);
  112 
  113         err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res, 
  114             INTR_TYPE_BIO | INTR_MPSAFE, NULL, 
  115             (driver_intr_t *)ohci_interrupt, sc, &sc->sc_ohci.sc_intr_hdl);
  116         if (err) {
  117                 err = ENXIO;
  118                 goto error;
  119         }
  120 
  121         strlcpy(sc->sc_ohci.sc_vendor, "Atheros", sizeof(sc->sc_ohci.sc_vendor));
  122 
  123         bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, OHCI_CONTROL, 0);
  124 
  125         err = ohci_init(&sc->sc_ohci);
  126         if (!err)
  127                 err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev);
  128 
  129         if (err)
  130                 goto error;
  131         return (0);
  132 
  133 error:
  134         if (err) {
  135                 ar71xx_ohci_detach(dev);
  136                 return (err);
  137         }
  138         return (err);
  139 }
  140 
  141 static int
  142 ar71xx_ohci_detach(device_t dev)
  143 {
  144         struct ar71xx_ohci_softc *sc = device_get_softc(dev);
  145         device_t bdev;
  146 
  147         if (sc->sc_ohci.sc_bus.bdev) {
  148                 bdev = sc->sc_ohci.sc_bus.bdev;
  149                 device_detach(bdev);
  150                 device_delete_child(dev, bdev);
  151         }
  152         /* during module unload there are lots of children leftover */
  153         device_delete_all_children(dev);
  154 
  155         /*
  156          * Put the controller into reset, then disable clocks and do
  157          * the MI tear down.  We have to disable the clocks/hardware
  158          * after we do the rest of the teardown.  We also disable the
  159          * clocks in the opposite order we acquire them, but that
  160          * doesn't seem to be absolutely necessary.  We free up the
  161          * clocks after we disable them, so the system could, in
  162          * theory, reuse them.
  163          */
  164         bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl,
  165             OHCI_CONTROL, 0);
  166 
  167         if (sc->sc_ohci.sc_intr_hdl) {
  168                 bus_teardown_intr(dev, sc->sc_ohci.sc_irq_res, sc->sc_ohci.sc_intr_hdl);
  169                 sc->sc_ohci.sc_intr_hdl = NULL;
  170         }
  171 
  172         if (sc->sc_ohci.sc_irq_res && sc->sc_ohci.sc_intr_hdl) {
  173                 /*
  174                  * only call ohci_detach() after ohci_init()
  175                  */
  176                 ohci_detach(&sc->sc_ohci);
  177 
  178                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.sc_irq_res);
  179                 sc->sc_ohci.sc_irq_res = NULL;
  180         }
  181         if (sc->sc_ohci.sc_io_res) {
  182                 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_ohci.sc_io_res);
  183                 sc->sc_ohci.sc_io_res = NULL;
  184                 sc->sc_ohci.sc_io_tag = 0;
  185                 sc->sc_ohci.sc_io_hdl = 0;
  186         }
  187         usb_bus_mem_free_all(&sc->sc_ohci.sc_bus, &ohci_iterate_hw_softc);
  188 
  189         return (0);
  190 }
  191 
  192 static device_method_t ohci_methods[] = {
  193         /* Device interface */
  194         DEVMETHOD(device_probe, ar71xx_ohci_probe),
  195         DEVMETHOD(device_attach, ar71xx_ohci_attach),
  196         DEVMETHOD(device_detach, ar71xx_ohci_detach),
  197         DEVMETHOD(device_shutdown, bus_generic_shutdown),
  198 
  199         /* Bus interface */
  200         DEVMETHOD(bus_print_child, bus_generic_print_child),
  201 
  202         {0, 0}
  203 };
  204 
  205 static driver_t ohci_driver = {
  206         "ohci",
  207         ohci_methods,
  208         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: e41dc2d555767ed98c06b9a9dd4ee730

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

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sys/mips/atheros/ar71xx_ohci.c