ohci_atmelarm.c

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    1 /*-
    2  * Copyright (c) 2006 M. Warner Losh.  All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   23  */
   24 
   25 #include <sys/cdefs.h>
   26 __FBSDID("$FreeBSD: releng/6.3/sys/arm/at91/ohci_atmelarm.c 159907 2006-06-23 23:35:36Z cognet $");
   27 
   28 #include <sys/param.h>
   29 #include <sys/systm.h>
   30 #include <sys/kernel.h>
   31 #include <sys/module.h>
   32 #include <sys/bus.h>
   33 #include <sys/queue.h>
   34 #include <machine/bus.h>
   35 #include <sys/rman.h>
   36 #include <machine/resource.h>
   37 
   38 #include <dev/usb/usb.h>
   39 #include <dev/usb/usbdi.h>
   40 #include <dev/usb/usbdivar.h>
   41 #include <dev/usb/usb_mem.h>
   42 
   43 #include <dev/usb/ohcireg.h>
   44 #include <dev/usb/ohcivar.h>
   45 
   46 #include <arm/at91/at91_pmcvar.h>
   47 
   48 #define MEM_RID 0
   49 
   50 static int ohci_atmelarm_attach(device_t dev);
   51 static int ohci_atmelarm_detach(device_t dev);
   52 
   53 struct at91_ohci_softc
   54 {
   55         struct ohci_softc sc_ohci;
   56         struct at91_pmc_clock *iclk;
   57         struct at91_pmc_clock *fclk;
   58 };
   59 
   60 static int
   61 ohci_atmelarm_probe(device_t dev)
   62 {
   63         device_set_desc(dev, "AT91 integrated ohci controller");
   64         return (BUS_PROBE_DEFAULT);
   65 }
   66 
   67 static int
   68 ohci_atmelarm_attach(device_t dev)
   69 {
   70         struct at91_ohci_softc *sc = device_get_softc(dev);
   71         int err;
   72         int rid;
   73 
   74         
   75         sc->iclk = at91_pmc_clock_ref("ohci_clk");
   76         sc->fclk = at91_pmc_clock_ref("uhpck");
   77 
   78         rid = MEM_RID;
   79         sc->sc_ohci.io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
   80             RF_ACTIVE);
   81         if (sc->sc_ohci.io_res == NULL) {
   82                 err = ENOMEM;
   83                 goto error;
   84         }
   85         sc->sc_ohci.iot = rman_get_bustag(sc->sc_ohci.io_res);
   86         sc->sc_ohci.ioh = rman_get_bushandle(sc->sc_ohci.io_res);
   87 
   88         rid = 0;
   89         sc->sc_ohci.irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
   90             RF_ACTIVE);
   91         if (sc->sc_ohci.irq_res == NULL) {
   92                 err = ENOMEM;
   93                 goto error;
   94         }
   95         sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usb", -1);
   96         if (sc->sc_ohci.sc_bus.bdev == NULL) {
   97                 err = ENOMEM;
   98                 goto error;
   99         }
  100         device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus);
  101 
  102         err = bus_setup_intr(dev, sc->sc_ohci.irq_res, INTR_TYPE_BIO, ohci_intr, sc,
  103             &sc->sc_ohci.ih);
  104         if (err) {
  105                 err = ENXIO;
  106                 goto error;
  107         }
  108         strlcpy(sc->sc_ohci.sc_vendor, "Atmel", sizeof(sc->sc_ohci.sc_vendor));
  109 
  110         /*
  111          * turn on the clocks from the AT91's point of view.  Keep the unit in reset.
  112          */
  113 //      bus_space_write_4(sc->sc_ohci.iot, sc->sc_ohci.ioh, OHCI_CONTROL, 0);
  114         at91_pmc_clock_enable(sc->iclk);
  115         at91_pmc_clock_enable(sc->fclk);
  116         bus_space_write_4(sc->sc_ohci.iot, sc->sc_ohci.ioh, OHCI_CONTROL, 0);
  117 
  118         err = ohci_init(&sc->sc_ohci);
  119         if (!err) {
  120                 sc->sc_ohci.sc_flags |= OHCI_SCFLG_DONEINIT;
  121                 err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev);
  122         }
  123 
  124 error:;
  125         if (err) {
  126                 ohci_atmelarm_detach(dev);
  127                 return (err);
  128         }
  129         return (err);
  130 }
  131 
  132 static int
  133 ohci_atmelarm_detach(device_t dev)
  134 {
  135         struct at91_ohci_softc *sc = device_get_softc(dev);
  136 
  137         if (sc->sc_ohci.sc_flags & OHCI_SCFLG_DONEINIT) {
  138                 ohci_detach(&sc->sc_ohci, 0);
  139                 sc->sc_ohci.sc_flags &= ~OHCI_SCFLG_DONEINIT;
  140         }
  141 
  142         /*
  143          * Put the controller into reset, then disable clocks and do
  144          * the MI tear down.  We have to disable the clocks/hardware
  145          * after we do the rest of the teardown.  We also disable the
  146          * clocks in the opposite order we acquire them, but that
  147          * doesn't seem to be absolutely necessary.  We free up the
  148          * clocks after we disable them, so the system could, in
  149          * theory, reuse them.
  150          */
  151         bus_space_write_4(sc->sc_ohci.iot, sc->sc_ohci.ioh, OHCI_CONTROL, 0);
  152         at91_pmc_clock_disable(sc->fclk);
  153         at91_pmc_clock_disable(sc->iclk);
  154         at91_pmc_clock_deref(sc->fclk);
  155         at91_pmc_clock_deref(sc->iclk);
  156 
  157         if (sc->sc_ohci.ih) {
  158                 bus_teardown_intr(dev, sc->sc_ohci.irq_res, sc->sc_ohci.ih);
  159                 sc->sc_ohci.ih = NULL;
  160         }
  161         if (sc->sc_ohci.sc_bus.bdev) {
  162                 device_delete_child(dev, sc->sc_ohci.sc_bus.bdev);
  163                 sc->sc_ohci.sc_bus.bdev = NULL;
  164         }
  165         if (sc->sc_ohci.irq_res) {
  166                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.irq_res);
  167                 sc->sc_ohci.irq_res = NULL;
  168         }
  169         if (sc->sc_ohci.io_res) {
  170                 bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID, sc->sc_ohci.io_res);
  171                 sc->sc_ohci.io_res = NULL;
  172                 sc->sc_ohci.iot = 0;
  173                 sc->sc_ohci.ioh = 0;
  174         }
  175         return (0);
  176 }
  177 
  178 static device_method_t ohci_methods[] = {
  179         /* Device interface */
  180         DEVMETHOD(device_probe, ohci_atmelarm_probe),
  181         DEVMETHOD(device_attach, ohci_atmelarm_attach),
  182         DEVMETHOD(device_detach, ohci_atmelarm_detach),
  183         DEVMETHOD(device_shutdown, bus_generic_shutdown),
  184 
  185         /* Bus interface */
  186         DEVMETHOD(bus_print_child, bus_generic_print_child),
  187 
  188         {0, 0}
  189 };
  190 
  191 static driver_t ohci_driver = {
  192         "ohci",
  193         ohci_methods,
  194         sizeof(struct at91_ohci_softc),
  195 };
  196 
  197 static devclass_t ohci_devclass;
  198 
  199 DRIVER_MODULE(ohci, atmelarm, ohci_driver, ohci_devclass, 0, 0);

Cache object: 66a085baf7d05fcb1b4a892f40e6de45

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FreeBSD/Linux Kernel Cross Reference sys/arm/at91/ohci_atmelarm.c

FreeBSD/Linux Kernel Cross Reference
sys/arm/at91/ohci_atmelarm.c