The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/controller/ehci_pci.c

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    1 /*-
    2  * Copyright (c) 1998 The NetBSD Foundation, Inc.
    3  * All rights reserved.
    4  *
    5  * This code is derived from software contributed to The NetBSD Foundation
    6  * by Lennart Augustsson (augustss@carlstedt.se) at
    7  * Carlstedt Research & Technology.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   28  * POSSIBILITY OF SUCH DAMAGE.
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD: releng/10.3/sys/dev/usb/controller/ehci_pci.c 278278 2015-02-05 20:03:02Z hselasky $");
   33 
   34 /*
   35  * USB Enhanced Host Controller Driver, a.k.a. USB 2.0 controller.
   36  *
   37  * The EHCI 1.0 spec can be found at
   38  * http://developer.intel.com/technology/usb/download/ehci-r10.pdf
   39  * and the USB 2.0 spec at
   40  * http://www.usb.org/developers/docs/usb_20.zip
   41  */
   42 
   43 /* The low level controller code for EHCI has been split into
   44  * PCI probes and EHCI specific code. This was done to facilitate the
   45  * sharing of code between *BSD's
   46  */
   47 
   48 #include <sys/stdint.h>
   49 #include <sys/stddef.h>
   50 #include <sys/param.h>
   51 #include <sys/queue.h>
   52 #include <sys/types.h>
   53 #include <sys/systm.h>
   54 #include <sys/kernel.h>
   55 #include <sys/bus.h>
   56 #include <sys/module.h>
   57 #include <sys/lock.h>
   58 #include <sys/mutex.h>
   59 #include <sys/condvar.h>
   60 #include <sys/sysctl.h>
   61 #include <sys/sx.h>
   62 #include <sys/unistd.h>
   63 #include <sys/callout.h>
   64 #include <sys/malloc.h>
   65 #include <sys/priv.h>
   66 
   67 #include <dev/usb/usb.h>
   68 #include <dev/usb/usbdi.h>
   69 
   70 #include <dev/usb/usb_core.h>
   71 #include <dev/usb/usb_busdma.h>
   72 #include <dev/usb/usb_process.h>
   73 #include <dev/usb/usb_util.h>
   74 
   75 #include <dev/usb/usb_controller.h>
   76 #include <dev/usb/usb_bus.h>
   77 #include <dev/usb/usb_pci.h>
   78 #include <dev/usb/controller/ehci.h>
   79 #include <dev/usb/controller/ehcireg.h>
   80 #include "usb_if.h"
   81 
   82 #define PCI_EHCI_VENDORID_ACERLABS      0x10b9
   83 #define PCI_EHCI_VENDORID_AMD           0x1022
   84 #define PCI_EHCI_VENDORID_APPLE         0x106b
   85 #define PCI_EHCI_VENDORID_ATI           0x1002
   86 #define PCI_EHCI_VENDORID_CMDTECH       0x1095
   87 #define PCI_EHCI_VENDORID_INTEL         0x8086
   88 #define PCI_EHCI_VENDORID_NEC           0x1033
   89 #define PCI_EHCI_VENDORID_OPTI          0x1045
   90 #define PCI_EHCI_VENDORID_PHILIPS       0x1131
   91 #define PCI_EHCI_VENDORID_SIS           0x1039
   92 #define PCI_EHCI_VENDORID_NVIDIA        0x12D2
   93 #define PCI_EHCI_VENDORID_NVIDIA2       0x10DE
   94 #define PCI_EHCI_VENDORID_VIA           0x1106
   95 
   96 static device_probe_t ehci_pci_probe;
   97 static device_attach_t ehci_pci_attach;
   98 static device_detach_t ehci_pci_detach;
   99 static usb_take_controller_t ehci_pci_take_controller;
  100 
  101 static const char *
  102 ehci_pci_match(device_t self)
  103 {
  104         uint32_t device_id = pci_get_devid(self);
  105 
  106         switch (device_id) {
  107         case 0x523910b9:
  108                 return "ALi M5239 USB 2.0 controller";
  109 
  110         case 0x10227463:
  111                 return "AMD 8111 USB 2.0 controller";
  112 
  113         case 0x20951022:
  114                 return ("AMD CS5536 (Geode) USB 2.0 controller");
  115 
  116         case 0x43451002:
  117                 return "ATI SB200 USB 2.0 controller";
  118         case 0x43731002:
  119                 return "ATI SB400 USB 2.0 controller";
  120         case 0x43961002:
  121                 return ("AMD SB7x0/SB8x0/SB9x0 USB 2.0 controller");
  122 
  123         case 0x0f348086:
  124                 return ("Intel BayTrail USB 2.0 controller");
  125         case 0x1d268086:
  126                 return ("Intel Patsburg USB 2.0 controller");
  127         case 0x1d2d8086:
  128                 return ("Intel Patsburg USB 2.0 controller");
  129         case 0x1e268086:
  130                 return ("Intel Panther Point USB 2.0 controller");
  131         case 0x1e2d8086:
  132                 return ("Intel Panther Point USB 2.0 controller");
  133         case 0x1f2c8086:
  134                 return ("Intel Avoton USB 2.0 controller");
  135         case 0x25ad8086:
  136                 return "Intel 6300ESB USB 2.0 controller";
  137         case 0x24cd8086:
  138                 return "Intel 82801DB/L/M (ICH4) USB 2.0 controller";
  139         case 0x24dd8086:
  140                 return "Intel 82801EB/R (ICH5) USB 2.0 controller";
  141         case 0x265c8086:
  142                 return "Intel 82801FB (ICH6) USB 2.0 controller";
  143         case 0x268c8086:
  144                 return ("Intel 63XXESB USB 2.0 controller");
  145         case 0x27cc8086:
  146                 return "Intel 82801GB/R (ICH7) USB 2.0 controller";
  147         case 0x28368086:
  148                 return "Intel 82801H (ICH8) USB 2.0 controller USB2-A";
  149         case 0x283a8086:
  150                 return "Intel 82801H (ICH8) USB 2.0 controller USB2-B";
  151         case 0x293a8086:
  152                 return "Intel 82801I (ICH9) USB 2.0 controller";
  153         case 0x293c8086:
  154                 return "Intel 82801I (ICH9) USB 2.0 controller";
  155         case 0x3a3a8086:
  156                 return "Intel 82801JI (ICH10) USB 2.0 controller USB-A";
  157         case 0x3a3c8086:
  158                 return "Intel 82801JI (ICH10) USB 2.0 controller USB-B";
  159         case 0x3b348086:
  160                 return ("Intel PCH USB 2.0 controller USB-A");
  161         case 0x3b3c8086:
  162                 return ("Intel PCH USB 2.0 controller USB-B");
  163         case 0x8c268086:
  164                 return ("Intel Lynx Point USB 2.0 controller USB-A");
  165         case 0x8c2d8086:
  166                 return ("Intel Lynx Point USB 2.0 controller USB-B");
  167         case 0x8ca68086:
  168                 return ("Intel Wildcat Point USB 2.0 controller USB-A");
  169         case 0x8cad8086:
  170                 return ("Intel Wildcat Point USB 2.0 controller USB-B");
  171 
  172         case 0x00e01033:
  173                 return ("NEC uPD 720100 USB 2.0 controller");
  174 
  175         case 0x006810de:
  176                 return "NVIDIA nForce2 USB 2.0 controller";
  177         case 0x008810de:
  178                 return "NVIDIA nForce2 Ultra 400 USB 2.0 controller";
  179         case 0x00d810de:
  180                 return "NVIDIA nForce3 USB 2.0 controller";
  181         case 0x00e810de:
  182                 return "NVIDIA nForce3 250 USB 2.0 controller";
  183         case 0x005b10de:
  184                 return "NVIDIA nForce CK804 USB 2.0 controller";
  185         case 0x036d10de:
  186                 return "NVIDIA nForce MCP55 USB 2.0 controller";
  187         case 0x03f210de:
  188                 return "NVIDIA nForce MCP61 USB 2.0 controller";
  189         case 0x0aa610de:
  190                 return "NVIDIA nForce MCP79 USB 2.0 controller";
  191         case 0x0aa910de:
  192                 return "NVIDIA nForce MCP79 USB 2.0 controller";
  193         case 0x0aaa10de:
  194                 return "NVIDIA nForce MCP79 USB 2.0 controller";
  195 
  196         case 0x15621131:
  197                 return "Philips ISP156x USB 2.0 controller";
  198 
  199         case 0x31041106:
  200                 return ("VIA VT6202 USB 2.0 controller");
  201 
  202         default:
  203                 break;
  204         }
  205 
  206         if ((pci_get_class(self) == PCIC_SERIALBUS)
  207             && (pci_get_subclass(self) == PCIS_SERIALBUS_USB)
  208             && (pci_get_progif(self) == PCI_INTERFACE_EHCI)) {
  209                 return ("EHCI (generic) USB 2.0 controller");
  210         }
  211         return (NULL);                  /* dunno */
  212 }
  213 
  214 static int
  215 ehci_pci_probe(device_t self)
  216 {
  217         const char *desc = ehci_pci_match(self);
  218 
  219         if (desc) {
  220                 device_set_desc(self, desc);
  221                 return (0);
  222         } else {
  223                 return (ENXIO);
  224         }
  225 }
  226 
  227 static void
  228 ehci_pci_ati_quirk(device_t self, uint8_t is_sb700)
  229 {
  230         device_t smbdev;
  231         uint32_t val;
  232 
  233         if (is_sb700) {
  234                 /* Lookup SMBUS PCI device */
  235                 smbdev = pci_find_device(PCI_EHCI_VENDORID_ATI, 0x4385);
  236                 if (smbdev == NULL)
  237                         return;
  238                 val = pci_get_revid(smbdev);
  239                 if (val != 0x3a && val != 0x3b)
  240                         return;
  241         }
  242 
  243         /*
  244          * Note: this bit is described as reserved in SB700
  245          * Register Reference Guide.
  246          */
  247         val = pci_read_config(self, 0x53, 1);
  248         if (!(val & 0x8)) {
  249                 val |= 0x8;
  250                 pci_write_config(self, 0x53, val, 1);
  251                 device_printf(self, "AMD SB600/700 quirk applied\n");
  252         }
  253 }
  254 
  255 static void
  256 ehci_pci_via_quirk(device_t self)
  257 {
  258         uint32_t val;
  259 
  260         if ((pci_get_device(self) == 0x3104) && 
  261             ((pci_get_revid(self) & 0xf0) == 0x60)) {
  262                 /* Correct schedule sleep time to 10us */
  263                 val = pci_read_config(self, 0x4b, 1);
  264                 if (val & 0x20)
  265                         return;
  266                 val |= 0x20;
  267                 pci_write_config(self, 0x4b, val, 1);
  268                 device_printf(self, "VIA-quirk applied\n");
  269         }
  270 }
  271 
  272 static int
  273 ehci_pci_attach(device_t self)
  274 {
  275         ehci_softc_t *sc = device_get_softc(self);
  276         int err;
  277         int rid;
  278 
  279         /* initialise some bus fields */
  280         sc->sc_bus.parent = self;
  281         sc->sc_bus.devices = sc->sc_devices;
  282         sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
  283         sc->sc_bus.dma_bits = 32;
  284 
  285         /* get all DMA memory */
  286         if (usb_bus_mem_alloc_all(&sc->sc_bus,
  287             USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
  288                 return (ENOMEM);
  289         }
  290 
  291         pci_enable_busmaster(self);
  292 
  293         switch (pci_read_config(self, PCI_USBREV, 1) & PCI_USB_REV_MASK) {
  294         case PCI_USB_REV_PRE_1_0:
  295         case PCI_USB_REV_1_0:
  296         case PCI_USB_REV_1_1:
  297                 /*
  298                  * NOTE: some EHCI USB controllers have the wrong USB
  299                  * revision number. It appears those controllers are
  300                  * fully compliant so we just ignore this value in
  301                  * some common cases.
  302                  */
  303                 device_printf(self, "pre-2.0 USB revision (ignored)\n");
  304                 /* fallthrough */
  305         case PCI_USB_REV_2_0:
  306                 break;
  307         default:
  308                 /* Quirk for Parallels Desktop 4.0 */
  309                 device_printf(self, "USB revision is unknown. Assuming v2.0.\n");
  310                 break;
  311         }
  312 
  313         rid = PCI_CBMEM;
  314         sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,
  315             RF_ACTIVE);
  316         if (!sc->sc_io_res) {
  317                 device_printf(self, "Could not map memory\n");
  318                 goto error;
  319         }
  320         sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
  321         sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
  322         sc->sc_io_size = rman_get_size(sc->sc_io_res);
  323 
  324         rid = 0;
  325         sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
  326             RF_SHAREABLE | RF_ACTIVE);
  327         if (sc->sc_irq_res == NULL) {
  328                 device_printf(self, "Could not allocate irq\n");
  329                 goto error;
  330         }
  331         sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
  332         if (!sc->sc_bus.bdev) {
  333                 device_printf(self, "Could not add USB device\n");
  334                 goto error;
  335         }
  336         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
  337 
  338         /*
  339          * ehci_pci_match will never return NULL if ehci_pci_probe
  340          * succeeded
  341          */
  342         device_set_desc(sc->sc_bus.bdev, ehci_pci_match(self));
  343         switch (pci_get_vendor(self)) {
  344         case PCI_EHCI_VENDORID_ACERLABS:
  345                 sprintf(sc->sc_vendor, "AcerLabs");
  346                 break;
  347         case PCI_EHCI_VENDORID_AMD:
  348                 sprintf(sc->sc_vendor, "AMD");
  349                 break;
  350         case PCI_EHCI_VENDORID_APPLE:
  351                 sprintf(sc->sc_vendor, "Apple");
  352                 break;
  353         case PCI_EHCI_VENDORID_ATI:
  354                 sprintf(sc->sc_vendor, "ATI");
  355                 break;
  356         case PCI_EHCI_VENDORID_CMDTECH:
  357                 sprintf(sc->sc_vendor, "CMDTECH");
  358                 break;
  359         case PCI_EHCI_VENDORID_INTEL:
  360                 sprintf(sc->sc_vendor, "Intel");
  361                 break;
  362         case PCI_EHCI_VENDORID_NEC:
  363                 sprintf(sc->sc_vendor, "NEC");
  364                 break;
  365         case PCI_EHCI_VENDORID_OPTI:
  366                 sprintf(sc->sc_vendor, "OPTi");
  367                 break;
  368         case PCI_EHCI_VENDORID_PHILIPS:
  369                 sprintf(sc->sc_vendor, "Philips");
  370                 break;
  371         case PCI_EHCI_VENDORID_SIS:
  372                 sprintf(sc->sc_vendor, "SiS");
  373                 break;
  374         case PCI_EHCI_VENDORID_NVIDIA:
  375         case PCI_EHCI_VENDORID_NVIDIA2:
  376                 sprintf(sc->sc_vendor, "nVidia");
  377                 break;
  378         case PCI_EHCI_VENDORID_VIA:
  379                 sprintf(sc->sc_vendor, "VIA");
  380                 break;
  381         default:
  382                 if (bootverbose)
  383                         device_printf(self, "(New EHCI DeviceId=0x%08x)\n",
  384                             pci_get_devid(self));
  385                 sprintf(sc->sc_vendor, "(0x%04x)", pci_get_vendor(self));
  386         }
  387 
  388 #if (__FreeBSD_version >= 700031)
  389         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
  390             NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
  391 #else
  392         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
  393             (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
  394 #endif
  395         if (err) {
  396                 device_printf(self, "Could not setup irq, %d\n", err);
  397                 sc->sc_intr_hdl = NULL;
  398                 goto error;
  399         }
  400         ehci_pci_take_controller(self);
  401 
  402         /* Undocumented quirks taken from Linux */
  403 
  404         switch (pci_get_vendor(self)) {
  405         case PCI_EHCI_VENDORID_ATI:
  406                 /* SB600 and SB700 EHCI quirk */
  407                 switch (pci_get_device(self)) {
  408                 case 0x4386:
  409                         ehci_pci_ati_quirk(self, 0);
  410                         break;
  411                 case 0x4396:
  412                         ehci_pci_ati_quirk(self, 1);
  413                         break;
  414                 default:
  415                         break;
  416                 }
  417                 break;
  418 
  419         case PCI_EHCI_VENDORID_VIA:
  420                 ehci_pci_via_quirk(self);
  421                 break;
  422 
  423         default:
  424                 break;
  425         }
  426 
  427         /* Dropped interrupts workaround */
  428         switch (pci_get_vendor(self)) {
  429         case PCI_EHCI_VENDORID_ATI:
  430         case PCI_EHCI_VENDORID_VIA:
  431                 sc->sc_flags |= EHCI_SCFLG_LOSTINTRBUG;
  432                 if (bootverbose)
  433                         device_printf(self,
  434                             "Dropped interrupts workaround enabled\n");
  435                 break;
  436         default:
  437                 break;
  438         }
  439 
  440         /* Doorbell feature workaround */
  441         switch (pci_get_vendor(self)) {
  442         case PCI_EHCI_VENDORID_NVIDIA:
  443         case PCI_EHCI_VENDORID_NVIDIA2:
  444                 sc->sc_flags |= EHCI_SCFLG_IAADBUG;
  445                 if (bootverbose)
  446                         device_printf(self,
  447                             "Doorbell workaround enabled\n");
  448                 break;
  449         default:
  450                 break;
  451         }
  452 
  453         err = ehci_init(sc);
  454         if (!err) {
  455                 err = device_probe_and_attach(sc->sc_bus.bdev);
  456         }
  457         if (err) {
  458                 device_printf(self, "USB init failed err=%d\n", err);
  459                 goto error;
  460         }
  461         return (0);
  462 
  463 error:
  464         ehci_pci_detach(self);
  465         return (ENXIO);
  466 }
  467 
  468 static int
  469 ehci_pci_detach(device_t self)
  470 {
  471         ehci_softc_t *sc = device_get_softc(self);
  472         device_t bdev;
  473 
  474         if (sc->sc_bus.bdev) {
  475                 bdev = sc->sc_bus.bdev;
  476                 device_detach(bdev);
  477                 device_delete_child(self, bdev);
  478         }
  479         /* during module unload there are lots of children leftover */
  480         device_delete_children(self);
  481 
  482         pci_disable_busmaster(self);
  483 
  484         if (sc->sc_irq_res && sc->sc_intr_hdl) {
  485                 /*
  486                  * only call ehci_detach() after ehci_init()
  487                  */
  488                 ehci_detach(sc);
  489 
  490                 int err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
  491 
  492                 if (err)
  493                         /* XXX or should we panic? */
  494                         device_printf(self, "Could not tear down irq, %d\n",
  495                             err);
  496                 sc->sc_intr_hdl = NULL;
  497         }
  498         if (sc->sc_irq_res) {
  499                 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
  500                 sc->sc_irq_res = NULL;
  501         }
  502         if (sc->sc_io_res) {
  503                 bus_release_resource(self, SYS_RES_MEMORY, PCI_CBMEM,
  504                     sc->sc_io_res);
  505                 sc->sc_io_res = NULL;
  506         }
  507         usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
  508 
  509         return (0);
  510 }
  511 
  512 static int
  513 ehci_pci_take_controller(device_t self)
  514 {
  515         ehci_softc_t *sc = device_get_softc(self);
  516         uint32_t cparams;
  517         uint32_t eec;
  518         uint16_t to;
  519         uint8_t eecp;
  520         uint8_t bios_sem;
  521 
  522         cparams = EREAD4(sc, EHCI_HCCPARAMS);
  523 
  524         /* Synchronise with the BIOS if it owns the controller. */
  525         for (eecp = EHCI_HCC_EECP(cparams); eecp != 0;
  526             eecp = EHCI_EECP_NEXT(eec)) {
  527                 eec = pci_read_config(self, eecp, 4);
  528                 if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP) {
  529                         continue;
  530                 }
  531                 bios_sem = pci_read_config(self, eecp +
  532                     EHCI_LEGSUP_BIOS_SEM, 1);
  533                 if (bios_sem == 0) {
  534                         continue;
  535                 }
  536                 device_printf(sc->sc_bus.bdev, "waiting for BIOS "
  537                     "to give up control\n");
  538                 pci_write_config(self, eecp +
  539                     EHCI_LEGSUP_OS_SEM, 1, 1);
  540                 to = 500;
  541                 while (1) {
  542                         bios_sem = pci_read_config(self, eecp +
  543                             EHCI_LEGSUP_BIOS_SEM, 1);
  544                         if (bios_sem == 0)
  545                                 break;
  546 
  547                         if (--to == 0) {
  548                                 device_printf(sc->sc_bus.bdev,
  549                                     "timed out waiting for BIOS\n");
  550                                 break;
  551                         }
  552                         usb_pause_mtx(NULL, hz / 100);  /* wait 10ms */
  553                 }
  554         }
  555         return (0);
  556 }
  557 
  558 static device_method_t ehci_pci_methods[] = {
  559         /* Device interface */
  560         DEVMETHOD(device_probe, ehci_pci_probe),
  561         DEVMETHOD(device_attach, ehci_pci_attach),
  562         DEVMETHOD(device_detach, ehci_pci_detach),
  563         DEVMETHOD(device_suspend, bus_generic_suspend),
  564         DEVMETHOD(device_resume, bus_generic_resume),
  565         DEVMETHOD(device_shutdown, bus_generic_shutdown),
  566         DEVMETHOD(usb_take_controller, ehci_pci_take_controller),
  567 
  568         DEVMETHOD_END
  569 };
  570 
  571 static driver_t ehci_driver = {
  572         .name = "ehci",
  573         .methods = ehci_pci_methods,
  574         .size = sizeof(struct ehci_softc),
  575 };
  576 
  577 static devclass_t ehci_devclass;
  578 
  579 DRIVER_MODULE(ehci, pci, ehci_driver, ehci_devclass, 0, 0);
  580 MODULE_DEPEND(ehci, usb, 1, 1, 1);

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