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/arm/econa/ehci_ebus.c

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    1 /*-
    2  * Copyright (C) 2009 Yohanes Nugroho <yohanes@gmail.com>
    3  * based on ehci_mbus.c
    4  * Copyright (C) 2008 MARVELL INTERNATIONAL LTD.
    5  * All rights reserved.
    6  *
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of MARVELL nor the names of contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD: releng/9.0/sys/arm/econa/ehci_ebus.c 220558 2011-04-12 07:49:11Z hselasky $");
   36 
   37 #include "opt_bus.h"
   38 
   39 #include <machine/resource.h>
   40 
   41 #include <sys/stdint.h>
   42 #include <sys/stddef.h>
   43 #include <sys/param.h>
   44 #include <sys/queue.h>
   45 #include <sys/types.h>
   46 #include <sys/systm.h>
   47 #include <sys/kernel.h>
   48 #include <sys/bus.h>
   49 #include <sys/module.h>
   50 #include <sys/lock.h>
   51 #include <sys/mutex.h>
   52 #include <sys/condvar.h>
   53 #include <sys/sysctl.h>
   54 #include <sys/sx.h>
   55 #include <sys/unistd.h>
   56 #include <sys/callout.h>
   57 #include <sys/malloc.h>
   58 #include <sys/priv.h>
   59 
   60 #include <sys/rman.h>
   61 
   62 #include <dev/usb/usb.h>
   63 #include <dev/usb/usbdi.h>
   64 
   65 #include <dev/usb/usb_core.h>
   66 #include <dev/usb/usb_busdma.h>
   67 #include <dev/usb/usb_process.h>
   68 #include <dev/usb/usb_util.h>
   69 
   70 #include <dev/usb/usb_controller.h>
   71 #include <dev/usb/usb_bus.h>
   72 #include <dev/usb/controller/ehci.h>
   73 #include <dev/usb/controller/ehcireg.h>
   74 
   75 
   76 static device_attach_t ehci_ebus_attach;
   77 static device_detach_t ehci_ebus_detach;
   78 static device_shutdown_t ehci_ebus_shutdown;
   79 static device_suspend_t ehci_ebus_suspend;
   80 static device_resume_t ehci_ebus_resume;
   81 
   82 
   83 static void *ih_err;
   84 
   85 #define EHCI_HC_DEVSTR "CNS11XX USB EHCI"
   86 #define USB_BRIDGE_INTR_MASK   0x214
   87 
   88 static int
   89 ehci_ebus_suspend(device_t self)
   90 {
   91         ehci_softc_t *sc = device_get_softc(self);
   92         int err;
   93 
   94         err = bus_generic_suspend(self);
   95         if (err)
   96                 return (err);
   97         ehci_suspend(sc);
   98         return (0);
   99 }
  100 
  101 static int
  102 ehci_ebus_resume(device_t self)
  103 {
  104         ehci_softc_t *sc = device_get_softc(self);
  105 
  106         ehci_resume(sc);
  107 
  108         bus_generic_resume(self);
  109 
  110         return (0);
  111 }
  112 
  113 static int
  114 ehci_ebus_shutdown(device_t self)
  115 {
  116         ehci_softc_t *sc = device_get_softc(self);
  117         int err;
  118 
  119         err = bus_generic_shutdown(self);
  120         if (err)
  121                 return (err);
  122         ehci_shutdown(sc);
  123 
  124         return (0);
  125 }
  126 
  127 static int
  128 ehci_ebus_probe(device_t self)
  129 {
  130 
  131         device_set_desc(self, EHCI_HC_DEVSTR);
  132 
  133         return (BUS_PROBE_DEFAULT);
  134 }
  135 
  136 static int
  137 ehci_ebus_attach(device_t self)
  138 {
  139         ehci_softc_t *sc = device_get_softc(self);
  140         bus_space_handle_t bsh;
  141         int err;
  142         int rid;
  143 
  144         /* initialise some bus fields */
  145         sc->sc_bus.parent = self;
  146         sc->sc_bus.devices = sc->sc_devices;
  147         sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
  148 
  149         /* get all DMA memory */
  150         if (usb_bus_mem_alloc_all(&sc->sc_bus,
  151             USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
  152                 return (ENOMEM);
  153         }
  154 
  155         sc->sc_bus.usbrev = USB_REV_2_0;
  156 
  157         rid = 0;
  158         sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY,
  159             &rid, RF_ACTIVE);
  160         if (!sc->sc_io_res) {
  161                 device_printf(self, "Could not map memory\n");
  162                 goto error;
  163         }
  164         sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
  165         bsh = rman_get_bushandle(sc->sc_io_res);
  166 
  167         /*magic, undocumented initialization*/
  168         bus_space_write_4((sc)->sc_io_tag, bsh, 0x04, 0x106);
  169 
  170         bus_space_write_4((sc)->sc_io_tag, bsh, 0x40, (3 << 5)|0x2000);
  171 
  172         DELAY(1000);
  173 
  174         sc->sc_io_size =  4096;
  175 
  176         if (bus_space_subregion(sc->sc_io_tag, bsh, 0x4000000,
  177             sc->sc_io_size, &sc->sc_io_hdl) != 0)
  178                 panic("%s: unable to subregion USB host registers",
  179                     device_get_name(self));
  180 
  181         rid = 0;
  182         sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
  183             RF_SHAREABLE | RF_ACTIVE);
  184         if (sc->sc_irq_res == NULL) {
  185                 device_printf(self, "Could not allocate irq\n");
  186                 ehci_ebus_detach(self);
  187                 return (ENXIO);
  188         }
  189 
  190         sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
  191         if (!sc->sc_bus.bdev) {
  192                 device_printf(self, "Could not add USB device\n");
  193                 goto error;
  194         }
  195         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
  196         device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
  197 
  198         sprintf(sc->sc_vendor, "Cavium");
  199 
  200         err = bus_setup_intr(self,sc->sc_irq_res,
  201             INTR_TYPE_BIO | INTR_MPSAFE, NULL,
  202             (driver_intr_t *)ehci_interrupt, sc,
  203             &sc->sc_intr_hdl);
  204         if (err) {
  205                 device_printf(self, "Could not setup error irq, %d\n", err);
  206                 ih_err = NULL;
  207                 goto error;
  208         }
  209 
  210         err = ehci_init(sc);
  211         if (!err) {
  212                 err = device_probe_and_attach(sc->sc_bus.bdev);
  213         }
  214         if (err) {
  215                 device_printf(self, "USB init failed err=%d\n", err);
  216                 goto error;
  217         }
  218         return (0);
  219 
  220 error:
  221         ehci_ebus_detach(self);
  222         return (ENXIO);
  223 }
  224 
  225 static int
  226 ehci_ebus_detach(device_t self)
  227 {
  228         ehci_softc_t *sc = device_get_softc(self);
  229         device_t bdev;
  230         int err;
  231 
  232         if (sc->sc_bus.bdev) {
  233                 bdev = sc->sc_bus.bdev;
  234                 device_detach(bdev);
  235                 device_delete_child(self, bdev);
  236         }
  237         /* during module unload there are lots of children leftover */
  238         device_delete_all_children(self);
  239 
  240         /*
  241          * disable interrupts that might have been switched on in
  242          * ehci_ebus_attach()
  243          */
  244         if (sc->sc_io_res) {
  245                 EWRITE4(sc, USB_BRIDGE_INTR_MASK, 0);
  246         }
  247         if (sc->sc_irq_res && sc->sc_intr_hdl) {
  248                 /*
  249                  * only call ehci_detach() after ehci_init()
  250                  */
  251                 ehci_detach(sc);
  252 
  253                 err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
  254 
  255                 if (err)
  256                         /* XXX or should we panic? */
  257                         device_printf(self, "Could not tear down irq, %d\n",
  258                             err);
  259                 sc->sc_intr_hdl = NULL;
  260         }
  261         if (sc->sc_irq_res) {
  262                 bus_release_resource(self, SYS_RES_IRQ, 1, sc->sc_irq_res);
  263                 sc->sc_irq_res = NULL;
  264         }
  265         if (sc->sc_io_res) {
  266                 bus_release_resource(self, SYS_RES_MEMORY, 0,
  267                     sc->sc_io_res);
  268                 sc->sc_io_res = NULL;
  269         }
  270         usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
  271 
  272         return (0);
  273 }
  274 
  275 static device_method_t ehci_methods[] = {
  276         /* Device interface */
  277         DEVMETHOD(device_probe, ehci_ebus_probe),
  278         DEVMETHOD(device_attach, ehci_ebus_attach),
  279         DEVMETHOD(device_detach, ehci_ebus_detach),
  280         DEVMETHOD(device_suspend, ehci_ebus_suspend),
  281         DEVMETHOD(device_resume, ehci_ebus_resume),
  282         DEVMETHOD(device_shutdown, ehci_ebus_shutdown),
  283 
  284         /* Bus interface */
  285         DEVMETHOD(bus_print_child, bus_generic_print_child),
  286 
  287         {0, 0}
  288 };
  289 
  290 static driver_t ehci_driver = {
  291         "ehci",
  292         ehci_methods,
  293         sizeof(ehci_softc_t),
  294 };
  295 
  296 static devclass_t ehci_devclass;
  297 
  298 DRIVER_MODULE(ehci, econaarm, ehci_driver, ehci_devclass, 0, 0);
  299 MODULE_DEPEND(ehci, usb, 1, 1, 1);

Cache object: f75f1905be460edcccdd7a352268630d


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