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/7.3/sys/arm/at91/ohci_atmelarm.c 180884 2008-07-28 15:55:41Z thompsa $");
   27 
   28 #include <sys/param.h>
   29 #include <sys/systm.h>
   30 #include <sys/kernel.h>
   31 #include <sys/lock.h>
   32 #include <sys/module.h>
   33 #include <sys/mutex.h>
   34 #include <sys/bus.h>
   35 #include <sys/queue.h>
   36 #include <machine/bus.h>
   37 #include <sys/rman.h>
   38 #include <machine/resource.h>
   39 
   40 #include <dev/usb/usb.h>
   41 #include <dev/usb/usbdi.h>
   42 #include <dev/usb/usbdivar.h>
   43 #include <dev/usb/usb_mem.h>
   44 
   45 #include <dev/usb/ohcireg.h>
   46 #include <dev/usb/ohcivar.h>
   47 
   48 #include <arm/at91/at91_pmcvar.h>
   49 
   50 #define MEM_RID 0
   51 
   52 static int ohci_atmelarm_attach(device_t dev);
   53 static int ohci_atmelarm_detach(device_t dev);
   54 
   55 struct at91_ohci_softc
   56 {
   57         struct ohci_softc sc_ohci;
   58         struct at91_pmc_clock *iclk;
   59         struct at91_pmc_clock *fclk;
   60 };
   61 
   62 static int
   63 ohci_atmelarm_probe(device_t dev)
   64 {
   65         device_set_desc(dev, "AT91 integrated ohci controller");
   66         return (BUS_PROBE_DEFAULT);
   67 }
   68 
   69 static int
   70 ohci_atmelarm_attach(device_t dev)
   71 {
   72         struct at91_ohci_softc *sc = device_get_softc(dev);
   73         int err;
   74         int rid;
   75 
   76         
   77         sc->iclk = at91_pmc_clock_ref("ohci_clk");
   78         sc->fclk = at91_pmc_clock_ref("uhpck");
   79 
   80         rid = MEM_RID;
   81         sc->sc_ohci.io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
   82             RF_ACTIVE);
   83         if (sc->sc_ohci.io_res == NULL) {
   84                 err = ENOMEM;
   85                 goto error;
   86         }
   87         sc->sc_ohci.iot = rman_get_bustag(sc->sc_ohci.io_res);
   88         sc->sc_ohci.ioh = rman_get_bushandle(sc->sc_ohci.io_res);
   89 
   90         rid = 0;
   91         sc->sc_ohci.irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
   92             RF_ACTIVE);
   93         if (sc->sc_ohci.irq_res == NULL) {
   94                 err = ENOMEM;
   95                 goto error;
   96         }
   97         sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usb", -1);
   98         if (sc->sc_ohci.sc_bus.bdev == NULL) {
   99                 err = ENOMEM;
  100                 goto error;
  101         }
  102         device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus);
  103 
  104         /* Allocate a parent dma tag for DMA maps */
  105         err = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
  106             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
  107             BUS_SPACE_MAXSIZE_32BIT, USB_DMA_NSEG, BUS_SPACE_MAXSIZE_32BIT, 0,
  108             NULL, NULL, &sc->sc_ohci.sc_bus.parent_dmatag);
  109         if (err) {
  110                 device_printf(dev, "Could not allocate parent DMA tag (%d)\n",
  111                     err);
  112                 err = ENXIO;
  113                 goto error;
  114         }
  115 
  116         /* Allocate a dma tag for transfer buffers */
  117         err = bus_dma_tag_create(sc->sc_ohci.sc_bus.parent_dmatag, 1, 0,
  118             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
  119             BUS_SPACE_MAXSIZE_32BIT, USB_DMA_NSEG, BUS_SPACE_MAXSIZE_32BIT, 0,
  120             busdma_lock_mutex, &Giant, &sc->sc_ohci.sc_bus.buffer_dmatag);
  121         if (err) {
  122                 device_printf(dev, "Could not allocate transfer tag (%d)\n",
  123                     err);
  124                 err = ENXIO;
  125                 goto error;
  126         }
  127 
  128         err = bus_setup_intr(dev, sc->sc_ohci.irq_res, INTR_TYPE_BIO, NULL, 
  129             ohci_intr, sc, &sc->sc_ohci.ih);
  130         if (err) {
  131                 err = ENXIO;
  132                 goto error;
  133         }
  134         strlcpy(sc->sc_ohci.sc_vendor, "Atmel", sizeof(sc->sc_ohci.sc_vendor));
  135 
  136         /*
  137          * turn on the clocks from the AT91's point of view.  Keep the unit in reset.
  138          */
  139         at91_pmc_clock_enable(sc->iclk);
  140         at91_pmc_clock_enable(sc->fclk);
  141         bus_space_write_4(sc->sc_ohci.iot, sc->sc_ohci.ioh, OHCI_CONTROL, 0);
  142 
  143         err = ohci_init(&sc->sc_ohci);
  144         if (!err) {
  145                 sc->sc_ohci.sc_flags |= OHCI_SCFLG_DONEINIT;
  146                 err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev);
  147         }
  148 
  149 error:;
  150         if (err) {
  151                 ohci_atmelarm_detach(dev);
  152                 return (err);
  153         }
  154         return (err);
  155 }
  156 
  157 static int
  158 ohci_atmelarm_detach(device_t dev)
  159 {
  160         struct at91_ohci_softc *sc = device_get_softc(dev);
  161 
  162         if (sc->sc_ohci.sc_flags & OHCI_SCFLG_DONEINIT) {
  163                 ohci_detach(&sc->sc_ohci, 0);
  164                 sc->sc_ohci.sc_flags &= ~OHCI_SCFLG_DONEINIT;
  165         }
  166 
  167         /*
  168          * Put the controller into reset, then disable clocks and do
  169          * the MI tear down.  We have to disable the clocks/hardware
  170          * after we do the rest of the teardown.  We also disable the
  171          * clocks in the opposite order we acquire them, but that
  172          * doesn't seem to be absolutely necessary.  We free up the
  173          * clocks after we disable them, so the system could, in
  174          * theory, reuse them.
  175          */
  176         bus_space_write_4(sc->sc_ohci.iot, sc->sc_ohci.ioh, OHCI_CONTROL, 0);
  177         at91_pmc_clock_disable(sc->fclk);
  178         at91_pmc_clock_disable(sc->iclk);
  179         at91_pmc_clock_deref(sc->fclk);
  180         at91_pmc_clock_deref(sc->iclk);
  181 
  182         if (sc->sc_ohci.ih) {
  183                 bus_teardown_intr(dev, sc->sc_ohci.irq_res, sc->sc_ohci.ih);
  184                 sc->sc_ohci.ih = NULL;
  185         }
  186 
  187         if (sc->sc_ohci.sc_bus.parent_dmatag != NULL)
  188                 bus_dma_tag_destroy(sc->sc_ohci.sc_bus.parent_dmatag);
  189         if (sc->sc_ohci.sc_bus.buffer_dmatag != NULL)
  190                 bus_dma_tag_destroy(sc->sc_ohci.sc_bus.buffer_dmatag);
  191 
  192         if (sc->sc_ohci.sc_bus.bdev) {
  193                 device_delete_child(dev, sc->sc_ohci.sc_bus.bdev);
  194                 sc->sc_ohci.sc_bus.bdev = NULL;
  195         }
  196         if (sc->sc_ohci.irq_res) {
  197                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.irq_res);
  198                 sc->sc_ohci.irq_res = NULL;
  199         }
  200         if (sc->sc_ohci.io_res) {
  201                 bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID, sc->sc_ohci.io_res);
  202                 sc->sc_ohci.io_res = NULL;
  203                 sc->sc_ohci.iot = 0;
  204                 sc->sc_ohci.ioh = 0;
  205         }
  206         return (0);
  207 }
  208 
  209 static device_method_t ohci_methods[] = {
  210         /* Device interface */
  211         DEVMETHOD(device_probe, ohci_atmelarm_probe),
  212         DEVMETHOD(device_attach, ohci_atmelarm_attach),
  213         DEVMETHOD(device_detach, ohci_atmelarm_detach),
  214         DEVMETHOD(device_shutdown, bus_generic_shutdown),
  215 
  216         /* Bus interface */
  217         DEVMETHOD(bus_print_child, bus_generic_print_child),
  218 
  219         {0, 0}
  220 };
  221 
  222 static driver_t ohci_driver = {
  223         "ohci",
  224         ohci_methods,
  225         sizeof(struct at91_ohci_softc),
  226 };
  227 
  228 static devclass_t ohci_devclass;
  229 
  230 DRIVER_MODULE(ohci, atmelarm, ohci_driver, ohci_devclass, 0, 0);

Cache object: d4ae7ceb9e449f3970fe53c32215f636

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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