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


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/mips/atheros/ar71xx_ehci.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2008 Sam Leffler.  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 /*
   26  * AR71XX attachment driver for the USB Enhanced Host Controller.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/10.1/sys/mips/atheros/ar71xx_ehci.c 265999 2014-05-14 01:35:43Z ian $");
   31 
   32 #include "opt_bus.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/bus.h>
   37 #include <sys/rman.h>
   38 #include <sys/condvar.h>
   39 #include <sys/kernel.h>
   40 #include <sys/module.h>
   41 
   42 #include <machine/bus.h>
   43 
   44 #include <dev/usb/usb.h>
   45 #include <dev/usb/usbdi.h>
   46 
   47 #include <dev/usb/usb_core.h>
   48 #include <dev/usb/usb_busdma.h>
   49 #include <dev/usb/usb_process.h>
   50 #include <dev/usb/usb_util.h>
   51 
   52 #include <dev/usb/usb_controller.h>
   53 #include <dev/usb/usb_bus.h>
   54 #include <dev/usb/controller/ehci.h>
   55 #include <dev/usb/controller/ehcireg.h>
   56 
   57 #include <mips/atheros/ar71xx_setup.h>
   58 #include <mips/atheros/ar71xx_bus_space_reversed.h>
   59 
   60 #define EHCI_HC_DEVSTR          "AR71XX Integrated USB 2.0 controller"
   61 
   62 struct ar71xx_ehci_softc {
   63         ehci_softc_t            base;   /* storage for EHCI code */
   64 };
   65 
   66 static device_attach_t ar71xx_ehci_attach;
   67 static device_detach_t ar71xx_ehci_detach;
   68 
   69 bs_r_1_proto(reversed);
   70 bs_w_1_proto(reversed);
   71 
   72 static int
   73 ar71xx_ehci_probe(device_t self)
   74 {
   75 
   76         device_set_desc(self, EHCI_HC_DEVSTR);
   77 
   78         return (BUS_PROBE_NOWILDCARD);
   79 }
   80 
   81 static int
   82 ar71xx_ehci_attach(device_t self)
   83 {
   84         struct ar71xx_ehci_softc *isc = device_get_softc(self);
   85         ehci_softc_t *sc = &isc->base;
   86         int err;
   87         int rid;
   88 
   89         /* initialise some bus fields */
   90         sc->sc_bus.parent = self;
   91         sc->sc_bus.devices = sc->sc_devices;
   92         sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
   93 
   94         /* get all DMA memory */
   95         if (usb_bus_mem_alloc_all(&sc->sc_bus,
   96             USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
   97                 return (ENOMEM);
   98         }
   99 
  100         sc->sc_bus.usbrev = USB_REV_2_0;
  101 
  102         /* NB: hints fix the memory location and irq */
  103 
  104         rid = 0;
  105         sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
  106         if (!sc->sc_io_res) {
  107                 device_printf(self, "Could not map memory\n");
  108                 goto error;
  109         }
  110 
  111         /*
  112          * Craft special resource for bus space ops that handle
  113          * byte-alignment of non-word addresses.  
  114          */
  115         sc->sc_io_tag = ar71xx_bus_space_reversed;
  116         sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
  117         sc->sc_io_size = rman_get_size(sc->sc_io_res);
  118 
  119         rid = 0;
  120         sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
  121             RF_ACTIVE);
  122         if (sc->sc_irq_res == NULL) {
  123                 device_printf(self, "Could not allocate irq\n");
  124                 goto error;
  125         }
  126         sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
  127         if (!sc->sc_bus.bdev) {
  128                 device_printf(self, "Could not add USB device\n");
  129                 goto error;
  130         }
  131         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
  132         device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
  133 
  134         sprintf(sc->sc_vendor, "Atheros");
  135 
  136 
  137         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
  138             NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
  139         if (err) {
  140                 device_printf(self, "Could not setup irq, %d\n", err);
  141                 sc->sc_intr_hdl = NULL;
  142                 goto error;
  143         }
  144 
  145         /*
  146          * Arrange to force Host mode, select big-endian byte alignment,
  147          * and arrange to not terminate reset operations (the adapter
  148          * will ignore it if we do but might as well save a reg write).
  149          * Also, the controller has an embedded Transaction Translator
  150          * which means port speed must be read from the Port Status
  151          * register following a port enable.
  152          */
  153         sc->sc_flags = EHCI_SCFLG_SETMODE;
  154 
  155         switch (ar71xx_soc) {
  156                 case AR71XX_SOC_AR7241:
  157                 case AR71XX_SOC_AR7242:
  158                 case AR71XX_SOC_AR9130:
  159                 case AR71XX_SOC_AR9132:
  160                 case AR71XX_SOC_AR9330:
  161                 case AR71XX_SOC_AR9331:
  162                         sc->sc_flags |= EHCI_SCFLG_TT | EHCI_SCFLG_NORESTERM;
  163                         break;
  164                 default:
  165                         /* fallthrough */
  166                         break;
  167         }
  168 
  169         /*
  170          * ehci_reset() needs the correct offset to access the host controller
  171          * registers. The AR724x/AR913x offsets aren't 0.
  172         */
  173         sc->sc_offs = EHCI_CAPLENGTH(EREAD4(sc, EHCI_CAPLEN_HCIVERSION));
  174 
  175 
  176         (void) ehci_reset(sc);
  177 
  178         err = ehci_init(sc);
  179         if (!err) {
  180                 err = device_probe_and_attach(sc->sc_bus.bdev);
  181         }
  182         if (err) {
  183                 device_printf(self, "USB init failed err=%d\n", err);
  184                 goto error;
  185         }
  186         return (0);
  187 
  188 error:
  189         ar71xx_ehci_detach(self);
  190         return (ENXIO);
  191 }
  192 
  193 static int
  194 ar71xx_ehci_detach(device_t self)
  195 {
  196         struct ar71xx_ehci_softc *isc = device_get_softc(self);
  197         ehci_softc_t *sc = &isc->base;
  198         device_t bdev;
  199         int err;
  200 
  201         if (sc->sc_bus.bdev) {
  202                 bdev = sc->sc_bus.bdev;
  203                 device_detach(bdev);
  204                 device_delete_child(self, bdev);
  205         }
  206         /* during module unload there are lots of children leftover */
  207         device_delete_children(self);
  208 
  209         if (sc->sc_irq_res && sc->sc_intr_hdl) {
  210                 /*
  211                  * only call ehci_detach() after ehci_init()
  212                  */
  213                 ehci_detach(sc);
  214 
  215                 err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
  216 
  217                 if (err)
  218                         /* XXX or should we panic? */
  219                         device_printf(self, "Could not tear down irq, %d\n",
  220                             err);
  221                 sc->sc_intr_hdl = NULL;
  222         }
  223 
  224         if (sc->sc_irq_res) {
  225                 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
  226                 sc->sc_irq_res = NULL;
  227         }
  228         if (sc->sc_io_res) {
  229                 bus_release_resource(self, SYS_RES_MEMORY, 0,
  230                     sc->sc_io_res);
  231                 sc->sc_io_res = NULL;
  232         }
  233         usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
  234 
  235         return (0);
  236 }
  237 
  238 static device_method_t ehci_methods[] = {
  239         /* Device interface */
  240         DEVMETHOD(device_probe, ar71xx_ehci_probe),
  241         DEVMETHOD(device_attach, ar71xx_ehci_attach),
  242         DEVMETHOD(device_detach, ar71xx_ehci_detach),
  243         DEVMETHOD(device_suspend, bus_generic_suspend),
  244         DEVMETHOD(device_resume, bus_generic_resume),
  245         DEVMETHOD(device_shutdown, bus_generic_shutdown),
  246 
  247         DEVMETHOD_END
  248 };
  249 
  250 static driver_t ehci_driver = {
  251         .name = "ehci",
  252         .methods = ehci_methods,
  253         .size = sizeof(struct ar71xx_ehci_softc),
  254 };
  255 
  256 static devclass_t ehci_devclass;
  257 
  258 DRIVER_MODULE(ehci, nexus, ehci_driver, ehci_devclass, 0, 0);
  259 MODULE_DEPEND(ehci, usb, 1, 1, 1);

Cache object: 18986c325fbd497d265c30f9c7544e15


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.