ehci_pci.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-NetBSD
    3  *
    4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Lennart Augustsson (augustss@carlstedt.se) at
    9  * Carlstedt Research & Technology.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   30  * POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD$");
   35 
   36 /*
   37  * USB Enhanced Host Controller Driver, a.k.a. USB 2.0 controller.
   38  *
   39  * The EHCI 1.0 spec can be found at
   40  * http://developer.intel.com/technology/usb/download/ehci-r10.pdf
   41  * and the USB 2.0 spec at
   42  * http://www.usb.org/developers/docs/usb_20.zip
   43  */
   44 
   45 /* The low level controller code for EHCI has been split into
   46  * PCI probes and EHCI specific code. This was done to facilitate the
   47  * sharing of code between *BSD's
   48  */
   49 
   50 #include <sys/stdint.h>
   51 #include <sys/stddef.h>
   52 #include <sys/param.h>
   53 #include <sys/queue.h>
   54 #include <sys/types.h>
   55 #include <sys/systm.h>
   56 #include <sys/kernel.h>
   57 #include <sys/bus.h>
   58 #include <sys/module.h>
   59 #include <sys/lock.h>
   60 #include <sys/mutex.h>
   61 #include <sys/condvar.h>
   62 #include <sys/sysctl.h>
   63 #include <sys/sx.h>
   64 #include <sys/unistd.h>
   65 #include <sys/callout.h>
   66 #include <sys/malloc.h>
   67 #include <sys/priv.h>
   68 
   69 #include <dev/usb/usb.h>
   70 #include <dev/usb/usbdi.h>
   71 
   72 #include <dev/usb/usb_core.h>
   73 #include <dev/usb/usb_busdma.h>
   74 #include <dev/usb/usb_process.h>
   75 #include <dev/usb/usb_util.h>
   76 
   77 #include <dev/usb/usb_controller.h>
   78 #include <dev/usb/usb_bus.h>
   79 #include <dev/usb/usb_pci.h>
   80 #include <dev/usb/controller/ehci.h>
   81 #include <dev/usb/controller/ehcireg.h>
   82 #include "usb_if.h"
   83 
   84 #define PCI_EHCI_VENDORID_ACERLABS      0x10b9
   85 #define PCI_EHCI_VENDORID_AMD           0x1022
   86 #define PCI_EHCI_VENDORID_APPLE         0x106b
   87 #define PCI_EHCI_VENDORID_ATI           0x1002
   88 #define PCI_EHCI_VENDORID_CMDTECH       0x1095
   89 #define PCI_EHCI_VENDORID_HYGON         0x1d94
   90 #define PCI_EHCI_VENDORID_INTEL         0x8086
   91 #define PCI_EHCI_VENDORID_NEC           0x1033
   92 #define PCI_EHCI_VENDORID_OPTI          0x1045
   93 #define PCI_EHCI_VENDORID_PHILIPS       0x1131
   94 #define PCI_EHCI_VENDORID_SIS           0x1039
   95 #define PCI_EHCI_VENDORID_NVIDIA        0x12D2
   96 #define PCI_EHCI_VENDORID_NVIDIA2       0x10DE
   97 #define PCI_EHCI_VENDORID_VIA           0x1106
   98 #define PCI_EHCI_VENDORID_VMWARE        0x15ad
   99 #define        PCI_EHCI_VENDORID_ZHAOXIN       0x1d17
  100 
  101 static device_probe_t ehci_pci_probe;
  102 static device_attach_t ehci_pci_attach;
  103 static device_detach_t ehci_pci_detach;
  104 static usb_take_controller_t ehci_pci_take_controller;
  105 
  106 static const char *
  107 ehci_pci_match(device_t self)
  108 {
  109         uint32_t device_id = pci_get_devid(self);
  110 
  111         switch (device_id) {
  112         case 0x523910b9:
  113                 return "ALi M5239 USB 2.0 controller";
  114 
  115         case 0x10227463:
  116                 return "AMD 8111 USB 2.0 controller";
  117 
  118         case 0x20951022:
  119                 return ("AMD CS5536 (Geode) USB 2.0 controller");
  120         case 0x78081022:
  121                 return ("AMD FCH USB 2.0 controller");
  122         case 0x79081022:
  123                 return ("AMD FCH USB 2.0 controller");
  124 
  125         case 0x43451002:
  126                 return "ATI SB200 USB 2.0 controller";
  127         case 0x43731002:
  128                 return "ATI SB400 USB 2.0 controller";
  129         case 0x43961002:
  130                 return ("AMD SB7x0/SB8x0/SB9x0 USB 2.0 controller");
  131 
  132         case 0x0f348086:
  133                 return ("Intel BayTrail USB 2.0 controller");
  134         case 0x1c268086:
  135                 return ("Intel Cougar Point USB 2.0 controller");
  136         case 0x1c2d8086:
  137                 return ("Intel Cougar Point USB 2.0 controller");
  138         case 0x1d268086:
  139                 return ("Intel Patsburg USB 2.0 controller");
  140         case 0x1d2d8086:
  141                 return ("Intel Patsburg USB 2.0 controller");
  142         case 0x1e268086:
  143                 return ("Intel Panther Point USB 2.0 controller");
  144         case 0x1e2d8086:
  145                 return ("Intel Panther Point USB 2.0 controller");
  146         case 0x1f2c8086:
  147                 return ("Intel Avoton USB 2.0 controller");
  148         case 0x25ad8086:
  149                 return "Intel 6300ESB USB 2.0 controller";
  150         case 0x24cd8086:
  151                 return "Intel 82801DB/L/M (ICH4) USB 2.0 controller";
  152         case 0x24dd8086:
  153                 return "Intel 82801EB/R (ICH5) USB 2.0 controller";
  154         case 0x265c8086:
  155                 return "Intel 82801FB (ICH6) USB 2.0 controller";
  156         case 0x268c8086:
  157                 return ("Intel 63XXESB USB 2.0 controller");
  158         case 0x27cc8086:
  159                 return "Intel 82801GB/R (ICH7) USB 2.0 controller";
  160         case 0x28368086:
  161                 return "Intel 82801H (ICH8) USB 2.0 controller USB2-A";
  162         case 0x283a8086:
  163                 return "Intel 82801H (ICH8) USB 2.0 controller USB2-B";
  164         case 0x293a8086:
  165                 return "Intel 82801I (ICH9) USB 2.0 controller";
  166         case 0x293c8086:
  167                 return "Intel 82801I (ICH9) USB 2.0 controller";
  168         case 0x3a3a8086:
  169                 return "Intel 82801JI (ICH10) USB 2.0 controller USB-A";
  170         case 0x3a3c8086:
  171                 return "Intel 82801JI (ICH10) USB 2.0 controller USB-B";
  172         case 0x3b348086:
  173                 return ("Intel PCH USB 2.0 controller USB-A");
  174         case 0x3b3c8086:
  175                 return ("Intel PCH USB 2.0 controller USB-B");
  176         case 0x8c268086:
  177                 return ("Intel Lynx Point USB 2.0 controller USB-A");
  178         case 0x8c2d8086:
  179                 return ("Intel Lynx Point USB 2.0 controller USB-B");
  180         case 0x8ca68086:
  181                 return ("Intel Wildcat Point USB 2.0 controller USB-A");
  182         case 0x8cad8086:
  183                 return ("Intel Wildcat Point USB 2.0 controller USB-B");
  184         case 0x8d268086:
  185                 return ("Intel Wellsburg USB 2.0 controller");
  186         case 0x8d2d8086:
  187                 return ("Intel Wellsburg USB 2.0 controller");
  188         case 0x9c268086:
  189                 return ("Intel Lynx Point-LP USB 2.0 controller");
  190         case 0x9ca68086:
  191                 return ("Intel Wildcat Point-LP USB 2.0 controller");
  192 
  193         case 0x00e01033:
  194                 return ("NEC uPD 72010x USB 2.0 controller");
  195 
  196         case 0x006810de:
  197                 return "NVIDIA nForce2 USB 2.0 controller";
  198         case 0x008810de:
  199                 return "NVIDIA nForce2 Ultra 400 USB 2.0 controller";
  200         case 0x00d810de:
  201                 return "NVIDIA nForce3 USB 2.0 controller";
  202         case 0x00e810de:
  203                 return "NVIDIA nForce3 250 USB 2.0 controller";
  204         case 0x005b10de:
  205                 return "NVIDIA nForce CK804 USB 2.0 controller";
  206         case 0x036d10de:
  207                 return "NVIDIA nForce MCP55 USB 2.0 controller";
  208         case 0x03f210de:
  209                 return "NVIDIA nForce MCP61 USB 2.0 controller";
  210         case 0x0aa610de:
  211                 return "NVIDIA nForce MCP79 USB 2.0 controller";
  212         case 0x0aa910de:
  213                 return "NVIDIA nForce MCP79 USB 2.0 controller";
  214         case 0x0aaa10de:
  215                 return "NVIDIA nForce MCP79 USB 2.0 controller";
  216 
  217         case 0x15621131:
  218                 return "Philips ISP156x USB 2.0 controller";
  219 
  220         case 0x70021039:
  221                 return "SiS 968 USB 2.0 controller";
  222 
  223         case 0x31041106:
  224                 return ("VIA VT6202 USB 2.0 controller");
  225 
  226         case 0x077015ad:
  227                 return ("VMware USB 2.0 controller");
  228 
  229        case 0x1d173104:
  230                return ("Zhaoxin ZX-100/ZX-200/ZX-E USB 2.0 controller");
  231 
  232         default:
  233                 break;
  234         }
  235 
  236         if ((pci_get_class(self) == PCIC_SERIALBUS)
  237             && (pci_get_subclass(self) == PCIS_SERIALBUS_USB)
  238             && (pci_get_progif(self) == PCI_INTERFACE_EHCI)) {
  239                 return ("EHCI (generic) USB 2.0 controller");
  240         }
  241         return (NULL);                  /* dunno */
  242 }
  243 
  244 static int
  245 ehci_pci_probe(device_t self)
  246 {
  247         const char *desc = ehci_pci_match(self);
  248 
  249         if (desc) {
  250                 device_set_desc(self, desc);
  251                 return (BUS_PROBE_DEFAULT);
  252         } else {
  253                 return (ENXIO);
  254         }
  255 }
  256 
  257 static void
  258 ehci_pci_ati_quirk(device_t self, uint8_t is_sb700)
  259 {
  260         device_t smbdev;
  261         uint32_t val;
  262 
  263         if (is_sb700) {
  264                 /* Lookup SMBUS PCI device */
  265                 smbdev = pci_find_device(PCI_EHCI_VENDORID_ATI, 0x4385);
  266                 if (smbdev == NULL)
  267                         return;
  268                 val = pci_get_revid(smbdev);
  269                 if (val != 0x3a && val != 0x3b)
  270                         return;
  271         }
  272 
  273         /*
  274          * Note: this bit is described as reserved in SB700
  275          * Register Reference Guide.
  276          */
  277         val = pci_read_config(self, 0x53, 1);
  278         if (!(val & 0x8)) {
  279                 val |= 0x8;
  280                 pci_write_config(self, 0x53, val, 1);
  281                 device_printf(self, "AMD SB600/700 quirk applied\n");
  282         }
  283 }
  284 
  285 static void
  286 ehci_pci_via_quirk(device_t self)
  287 {
  288         uint32_t val;
  289 
  290         if ((pci_get_device(self) == 0x3104) && 
  291             ((pci_get_revid(self) & 0xf0) == 0x60)) {
  292                 /* Correct schedule sleep time to 10us */
  293                 val = pci_read_config(self, 0x4b, 1);
  294                 if (val & 0x20)
  295                         return;
  296                 val |= 0x20;
  297                 pci_write_config(self, 0x4b, val, 1);
  298                 device_printf(self, "VIA-quirk applied\n");
  299         }
  300 }
  301 
  302 static int
  303 ehci_pci_attach(device_t self)
  304 {
  305         ehci_softc_t *sc = device_get_softc(self);
  306         int err;
  307         int rid;
  308 
  309         /* initialise some bus fields */
  310         sc->sc_bus.parent = self;
  311         sc->sc_bus.devices = sc->sc_devices;
  312         sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
  313         sc->sc_bus.dma_bits = 32;
  314 
  315         /* get all DMA memory */
  316         if (usb_bus_mem_alloc_all(&sc->sc_bus,
  317             USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
  318                 return (ENOMEM);
  319         }
  320 
  321         pci_enable_busmaster(self);
  322 
  323         switch (pci_read_config(self, PCI_USBREV, 1) & PCI_USB_REV_MASK) {
  324         case PCI_USB_REV_PRE_1_0:
  325         case PCI_USB_REV_1_0:
  326         case PCI_USB_REV_1_1:
  327                 /*
  328                  * NOTE: some EHCI USB controllers have the wrong USB
  329                  * revision number. It appears those controllers are
  330                  * fully compliant so we just ignore this value in
  331                  * some common cases.
  332                  */
  333                 device_printf(self, "pre-2.0 USB revision (ignored)\n");
  334                 /* fallthrough */
  335         case PCI_USB_REV_2_0:
  336                 break;
  337         default:
  338                 /* Quirk for Parallels Desktop 4.0 */
  339                 device_printf(self, "USB revision is unknown. Assuming v2.0.\n");
  340                 break;
  341         }
  342 
  343         rid = PCI_CBMEM;
  344         sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,
  345             RF_ACTIVE);
  346         if (!sc->sc_io_res) {
  347                 device_printf(self, "Could not map memory\n");
  348                 goto error;
  349         }
  350         sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
  351         sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
  352         sc->sc_io_size = rman_get_size(sc->sc_io_res);
  353 
  354         rid = 0;
  355         sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
  356             RF_SHAREABLE | RF_ACTIVE);
  357         if (sc->sc_irq_res == NULL) {
  358                 device_printf(self, "Could not allocate irq\n");
  359                 goto error;
  360         }
  361         sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
  362         if (!sc->sc_bus.bdev) {
  363                 device_printf(self, "Could not add USB device\n");
  364                 goto error;
  365         }
  366         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
  367 
  368         /*
  369          * ehci_pci_match will never return NULL if ehci_pci_probe
  370          * succeeded
  371          */
  372         device_set_desc(sc->sc_bus.bdev, ehci_pci_match(self));
  373         switch (pci_get_vendor(self)) {
  374         case PCI_EHCI_VENDORID_ACERLABS:
  375                 sprintf(sc->sc_vendor, "AcerLabs");
  376                 break;
  377         case PCI_EHCI_VENDORID_AMD:
  378                 sprintf(sc->sc_vendor, "AMD");
  379                 break;
  380         case PCI_EHCI_VENDORID_APPLE:
  381                 sprintf(sc->sc_vendor, "Apple");
  382                 break;
  383         case PCI_EHCI_VENDORID_ATI:
  384                 sprintf(sc->sc_vendor, "ATI");
  385                 break;
  386         case PCI_EHCI_VENDORID_CMDTECH:
  387                 sprintf(sc->sc_vendor, "CMDTECH");
  388                 break;
  389         case PCI_EHCI_VENDORID_HYGON:
  390                 sprintf(sc->sc_vendor, "Hygon");
  391                 break;
  392         case PCI_EHCI_VENDORID_INTEL:
  393                 sprintf(sc->sc_vendor, "Intel");
  394                 break;
  395         case PCI_EHCI_VENDORID_NEC:
  396                 sprintf(sc->sc_vendor, "NEC");
  397                 break;
  398         case PCI_EHCI_VENDORID_OPTI:
  399                 sprintf(sc->sc_vendor, "OPTi");
  400                 break;
  401         case PCI_EHCI_VENDORID_PHILIPS:
  402                 sprintf(sc->sc_vendor, "Philips");
  403                 break;
  404         case PCI_EHCI_VENDORID_SIS:
  405                 sprintf(sc->sc_vendor, "SiS");
  406                 break;
  407         case PCI_EHCI_VENDORID_NVIDIA:
  408         case PCI_EHCI_VENDORID_NVIDIA2:
  409                 sprintf(sc->sc_vendor, "nVidia");
  410                 break;
  411         case PCI_EHCI_VENDORID_VIA:
  412                 sprintf(sc->sc_vendor, "VIA");
  413                 break;
  414         case PCI_EHCI_VENDORID_VMWARE:
  415                 sprintf(sc->sc_vendor, "VMware");
  416                 break;
  417        case PCI_EHCI_VENDORID_ZHAOXIN:
  418                sprintf(sc->sc_vendor, "Zhaoxin");
  419                break;
  420         default:
  421                 if (bootverbose)
  422                         device_printf(self, "(New EHCI DeviceId=0x%08x)\n",
  423                             pci_get_devid(self));
  424                 sprintf(sc->sc_vendor, "(0x%04x)", pci_get_vendor(self));
  425         }
  426 
  427 #if (__FreeBSD_version >= 700031)
  428         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
  429             NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
  430 #else
  431         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
  432             (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
  433 #endif
  434         if (err) {
  435                 device_printf(self, "Could not setup irq, %d\n", err);
  436                 sc->sc_intr_hdl = NULL;
  437                 goto error;
  438         }
  439         ehci_pci_take_controller(self);
  440 
  441         /* Undocumented quirks taken from Linux */
  442 
  443         switch (pci_get_vendor(self)) {
  444         case PCI_EHCI_VENDORID_ATI:
  445                 /* SB600 and SB700 EHCI quirk */
  446                 switch (pci_get_device(self)) {
  447                 case 0x4386:
  448                         ehci_pci_ati_quirk(self, 0);
  449                         break;
  450                 case 0x4396:
  451                         ehci_pci_ati_quirk(self, 1);
  452                         break;
  453                 default:
  454                         break;
  455                 }
  456                 break;
  457 
  458         case PCI_EHCI_VENDORID_VIA:
  459                 ehci_pci_via_quirk(self);
  460                 break;
  461 
  462         default:
  463                 break;
  464         }
  465 
  466         /* Dropped interrupts workaround */
  467         switch (pci_get_vendor(self)) {
  468         case PCI_EHCI_VENDORID_ATI:
  469         case PCI_EHCI_VENDORID_VIA:
  470                 sc->sc_flags |= EHCI_SCFLG_LOSTINTRBUG;
  471                 if (bootverbose)
  472                         device_printf(self,
  473                             "Dropped interrupts workaround enabled\n");
  474                 break;
  475         default:
  476                 break;
  477         }
  478 
  479         /* Doorbell feature workaround */
  480         switch (pci_get_vendor(self)) {
  481         case PCI_EHCI_VENDORID_NVIDIA:
  482         case PCI_EHCI_VENDORID_NVIDIA2:
  483                 sc->sc_flags |= EHCI_SCFLG_IAADBUG;
  484                 if (bootverbose)
  485                         device_printf(self,
  486                             "Doorbell workaround enabled\n");
  487                 break;
  488         default:
  489                 break;
  490         }
  491 
  492         err = ehci_init(sc);
  493         if (!err) {
  494                 err = device_probe_and_attach(sc->sc_bus.bdev);
  495         }
  496         if (err) {
  497                 device_printf(self, "USB init failed err=%d\n", err);
  498                 goto error;
  499         }
  500         return (0);
  501 
  502 error:
  503         ehci_pci_detach(self);
  504         return (ENXIO);
  505 }
  506 
  507 static int
  508 ehci_pci_detach(device_t self)
  509 {
  510         ehci_softc_t *sc = device_get_softc(self);
  511 
  512         /* during module unload there are lots of children leftover */
  513         device_delete_children(self);
  514 
  515         pci_disable_busmaster(self);
  516 
  517         if (sc->sc_irq_res && sc->sc_intr_hdl) {
  518                 /*
  519                  * only call ehci_detach() after ehci_init()
  520                  */
  521                 ehci_detach(sc);
  522 
  523                 int err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
  524 
  525                 if (err)
  526                         /* XXX or should we panic? */
  527                         device_printf(self, "Could not tear down irq, %d\n",
  528                             err);
  529                 sc->sc_intr_hdl = NULL;
  530         }
  531         if (sc->sc_irq_res) {
  532                 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
  533                 sc->sc_irq_res = NULL;
  534         }
  535         if (sc->sc_io_res) {
  536                 bus_release_resource(self, SYS_RES_MEMORY, PCI_CBMEM,
  537                     sc->sc_io_res);
  538                 sc->sc_io_res = NULL;
  539         }
  540         usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
  541 
  542         return (0);
  543 }
  544 
  545 static int
  546 ehci_pci_take_controller(device_t self)
  547 {
  548         ehci_softc_t *sc = device_get_softc(self);
  549         uint32_t cparams;
  550         uint32_t eec;
  551         uint16_t to;
  552         uint8_t eecp;
  553         uint8_t bios_sem;
  554 
  555         cparams = EREAD4(sc, EHCI_HCCPARAMS);
  556 
  557         /* Synchronise with the BIOS if it owns the controller. */
  558         for (eecp = EHCI_HCC_EECP(cparams); eecp != 0;
  559             eecp = EHCI_EECP_NEXT(eec)) {
  560                 eec = pci_read_config(self, eecp, 4);
  561                 if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP) {
  562                         continue;
  563                 }
  564                 bios_sem = pci_read_config(self, eecp +
  565                     EHCI_LEGSUP_BIOS_SEM, 1);
  566                 if (bios_sem == 0) {
  567                         continue;
  568                 }
  569                 device_printf(sc->sc_bus.bdev, "waiting for BIOS "
  570                     "to give up control\n");
  571                 pci_write_config(self, eecp +
  572                     EHCI_LEGSUP_OS_SEM, 1, 1);
  573                 to = 500;
  574                 while (1) {
  575                         bios_sem = pci_read_config(self, eecp +
  576                             EHCI_LEGSUP_BIOS_SEM, 1);
  577                         if (bios_sem == 0)
  578                                 break;
  579 
  580                         if (--to == 0) {
  581                                 device_printf(sc->sc_bus.bdev,
  582                                     "timed out waiting for BIOS\n");
  583                                 break;
  584                         }
  585                         usb_pause_mtx(NULL, hz / 100);  /* wait 10ms */
  586                 }
  587         }
  588         return (0);
  589 }
  590 
  591 static device_method_t ehci_pci_methods[] = {
  592         /* Device interface */
  593         DEVMETHOD(device_probe, ehci_pci_probe),
  594         DEVMETHOD(device_attach, ehci_pci_attach),
  595         DEVMETHOD(device_detach, ehci_pci_detach),
  596         DEVMETHOD(device_suspend, bus_generic_suspend),
  597         DEVMETHOD(device_resume, bus_generic_resume),
  598         DEVMETHOD(device_shutdown, bus_generic_shutdown),
  599         DEVMETHOD(usb_take_controller, ehci_pci_take_controller),
  600 
  601         DEVMETHOD_END
  602 };
  603 
  604 static driver_t ehci_driver = {
  605         .name = "ehci",
  606         .methods = ehci_pci_methods,
  607         .size = sizeof(struct ehci_softc),
  608 };
  609 
  610 DRIVER_MODULE(ehci, pci, ehci_driver, 0, 0);
  611 MODULE_DEPEND(ehci, usb, 1, 1, 1);
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FreeBSD/Linux Kernel Cross Reference sys/dev/usb/controller/ehci_pci.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/controller/ehci_pci.c
