FreeBSD/Linux Kernel Cross Reference
sys/pci/uhci_pci.c

     /*
      * Copyright (c) 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Lennart Augustsson (augustss@carlstedt.se) at
      * Carlstedt Research & Technology.
      *
      * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *        This product includes software developed by the NetBSD
     *        Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     *
     * $FreeBSD: releng/5.0/sys/pci/uhci_pci.c 102537 2002-08-28 20:24:49Z joe $
     */
    
    /* Universal Host Controller Interface
     *
     * UHCI spec: http://www.intel.com/
     */
    
    /* The low level controller code for UHCI has been split into
     * PCI probes and UHCI specific code. This was done to facilitate the
     * sharing of code between *BSD's
     */
    
    #include "opt_bus.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/bus.h>
    #include <sys/queue.h>
    #if defined(__FreeBSD__)
    #include <sys/bus.h>
    
    #include <machine/bus.h>
    #include <machine/resource.h>
    #include <sys/rman.h>
    #endif
    
    #include <pci/pcivar.h>
    #include <pci/pcireg.h>
    
    #include <dev/usb/usb.h>
    #include <dev/usb/usbdi.h>
    #include <dev/usb/usbdivar.h>
    #include <dev/usb/usb_mem.h>
    
    #include <dev/usb/uhcireg.h>
    #include <dev/usb/uhcivar.h>
    
    #define PCI_UHCI_VENDORID_INTEL         0x8086
    #define PCI_UHCI_VENDORID_VIA           0x1106
    
    #define PCI_UHCI_DEVICEID_PIIX3         0x70208086
    static const char *uhci_device_piix3 = "Intel 82371SB (PIIX3) USB controller";
    
    #define PCI_UHCI_DEVICEID_PIIX4         0x71128086
    #define PCI_UHCI_DEVICEID_PIIX4E        0x71128086      /* no separate stepping */
    static const char *uhci_device_piix4 = "Intel 82371AB/EB (PIIX4) USB controller";
    
    #define PCI_UHCI_DEVICEID_ICH           0x24128086
    static const char *uhci_device_ich = "Intel 82801AA (ICH) USB controller";
    
    #define PCI_UHCI_DEVICEID_ICH0          0x24228086
    static const char *uhci_device_ich0 = "Intel 82801AB (ICH0) USB controller";
    
    #define PCI_UHCI_DEVICEID_ICH2_A        0x24428086
    static const char *uhci_device_ich2_a = "Intel 82801BA/BAM (ICH2) USB controller USB-A";
    
    #define PCI_UHCI_DEVICEID_ICH2_B        0x24448086
    static const char *uhci_device_ich2_b = "Intel 82801BA/BAM (ICH2) USB controller USB-B";
    
    #define PCI_UHCI_DEVICEID_ICH3_A        0x24828086
   static const char *uhci_device_ich3_a = "Intel 82801CA/CAM (ICH3) USB controller USB-A";
   
   #define PCI_UHCI_DEVICEID_ICH3_B        0x24848086
   static const char *uhci_device_ich3_b = "Intel 82801CA/CAM (ICH3) USB controller USB-B";
   
   #define PCI_UHCI_DEVICEID_ICH3_C        0x24878086
   static const char *uhci_device_ich3_c = "Intel 82801CA/CAM (ICH3) USB controller USB-C";
   
   #define PCI_UHCI_DEVICEID_ICH4_A        0x24c28086
   static const char *uhci_device_ich4_a = "Intel 82801DB (ICH4) USB controller USB-A";
   
   #define PCI_UHCI_DEVICEID_ICH4_B        0x24c48086
   static const char *uhci_device_ich4_b = "Intel 82801DB (ICH4) USB controller USB-B";
   
   #define PCI_UHCI_DEVICEID_ICH4_C        0x24c78086
   static const char *uhci_device_ich4_c = "Intel 82801DB (ICH4) USB controller USB-C";
   
   #define PCI_UHCI_DEVICEID_440MX         0x719a8086
   static const char *uhci_device_440mx = "Intel 82443MX USB controller";
   
   #define PCI_UHCI_DEVICEID_460GX         0x76028086
   static const char *uhci_device_460gx = "Intel 82372FB/82468GX USB controller";
   
   #define PCI_UHCI_DEVICEID_VT83C572      0x30381106
   static const char *uhci_device_vt83c572 = "VIA 83C572 USB controller";
   
   static const char *uhci_device_generic = "UHCI (generic) USB controller";
   
   #define PCI_UHCI_BASE_REG               0x20
   
   
   static int uhci_pci_attach(device_t self);
   static int uhci_pci_detach(device_t self);
   static int uhci_pci_suspend(device_t self);
   static int uhci_pci_resume(device_t self);
   
   
   static int
   uhci_pci_suspend(device_t self)
   {
           uhci_softc_t *sc = device_get_softc(self);
           int err;
   
           err = bus_generic_suspend(self);
           if (err)
                   return err;
           uhci_power(PWR_SUSPEND, sc);
   
           return 0;
   }
   
   static int
   uhci_pci_resume(device_t self)
   {
           uhci_softc_t *sc = device_get_softc(self);
   
           uhci_power(PWR_RESUME, sc);
           bus_generic_resume(self);
   
           return 0;
   }
   
   static const char *
   uhci_pci_match(device_t self)
   {
           u_int32_t device_id = pci_get_devid(self);
   
           if (device_id == PCI_UHCI_DEVICEID_PIIX3) {
                   return (uhci_device_piix3);
           } else if (device_id == PCI_UHCI_DEVICEID_PIIX4) {
                   return (uhci_device_piix4);
           } else if (device_id == PCI_UHCI_DEVICEID_ICH) {
                   return (uhci_device_ich);
           } else if (device_id == PCI_UHCI_DEVICEID_ICH0) {
                   return (uhci_device_ich0);
           } else if (device_id == PCI_UHCI_DEVICEID_ICH2_A) {
                   return (uhci_device_ich2_a);
           } else if (device_id == PCI_UHCI_DEVICEID_ICH2_B) {
                   return (uhci_device_ich2_b);
           } else if (device_id == PCI_UHCI_DEVICEID_ICH3_A) {
                   return (uhci_device_ich3_a);
           } else if (device_id == PCI_UHCI_DEVICEID_ICH3_B) {
                   return (uhci_device_ich3_b);
           } else if (device_id == PCI_UHCI_DEVICEID_ICH3_C) {
                   return (uhci_device_ich3_c);
           } else if (device_id == PCI_UHCI_DEVICEID_ICH4_A) {
                   return (uhci_device_ich4_a);
           } else if (device_id == PCI_UHCI_DEVICEID_ICH4_B) {
                   return (uhci_device_ich4_b);
           } else if (device_id == PCI_UHCI_DEVICEID_ICH4_C) {
                   return (uhci_device_ich4_c);
           } else if (device_id == PCI_UHCI_DEVICEID_440MX) {
                   return (uhci_device_440mx);
           } else if (device_id == PCI_UHCI_DEVICEID_460GX) {
                   return (uhci_device_460gx);
           } else if (device_id == PCI_UHCI_DEVICEID_VT83C572) {
                   return (uhci_device_vt83c572);
           } else {
                   if (pci_get_class(self) == PCIC_SERIALBUS
                       && pci_get_subclass(self) == PCIS_SERIALBUS_USB
                       && pci_get_progif(self) == PCI_INTERFACE_UHCI) {
                           return (uhci_device_generic);
                   }
           }
   
           return NULL;            /* dunno... */
   }
   
   static int
   uhci_pci_probe(device_t self)
   {
           const char *desc = uhci_pci_match(self);
   
           if (desc) {
                   device_set_desc(self, desc);
                   return 0;
           } else {
                   return ENXIO;
           }
   }
   
   static int
   uhci_pci_attach(device_t self)
   {
           uhci_softc_t *sc = device_get_softc(self);
           int rid;
           int err;
   
           rid = PCI_UHCI_BASE_REG;
           sc->io_res = bus_alloc_resource(self, SYS_RES_IOPORT, &rid,
               0, ~0, 1, RF_ACTIVE);
           if (!sc->io_res) {
                   device_printf(self, "Could not map ports\n");
                   return ENXIO;
           }
           sc->iot = rman_get_bustag(sc->io_res);
           sc->ioh = rman_get_bushandle(sc->io_res);
   
           /* disable interrupts */
           bus_space_write_2(sc->iot, sc->ioh, UHCI_INTR, 0);
   
           rid = 0;
           sc->irq_res = bus_alloc_resource(self, SYS_RES_IRQ, &rid,
               0, ~0, 1,
               RF_SHAREABLE | RF_ACTIVE);
           if (sc->irq_res == NULL) {
                   device_printf(self, "Could not allocate irq\n");
                   uhci_pci_detach(self);
                   return ENXIO;
           }
           sc->sc_bus.bdev = device_add_child(self, "usb", -1);
           if (!sc->sc_bus.bdev) {
                   device_printf(self, "Could not add USB device\n");
                   uhci_pci_detach(self);
                   return ENOMEM;
           }
           device_set_ivars(sc->sc_bus.bdev, sc);
   
           /* uhci_pci_match must never return NULL if uhci_pci_probe succeeded */
           device_set_desc(sc->sc_bus.bdev, uhci_pci_match(self));
           switch (pci_get_vendor(self)) {
           case PCI_UHCI_VENDORID_INTEL:
                   sprintf(sc->sc_vendor, "Intel");
                   break;
           case PCI_UHCI_VENDORID_VIA:
                   sprintf(sc->sc_vendor, "VIA");
                   break;
           default:
                   if (bootverbose)
                           device_printf(self, "(New UHCI DeviceId=0x%08x)\n",
                               pci_get_devid(self));
                   sprintf(sc->sc_vendor, "(0x%04x)", pci_get_vendor(self));
           }
   
           switch (pci_read_config(self, PCI_USBREV, 4) & PCI_USBREV_MASK) {
           case PCI_USBREV_PRE_1_0:
                   sc->sc_bus.usbrev = USBREV_PRE_1_0;
                   break;
           case PCI_USBREV_1_0:
                   sc->sc_bus.usbrev = USBREV_1_0;
                   break;
           default:
                   sc->sc_bus.usbrev = USBREV_UNKNOWN;
                   break;
           }
   
           err = bus_setup_intr(self, sc->irq_res, INTR_TYPE_BIO,
               (driver_intr_t *) uhci_intr, sc, &sc->ih);
           if (err) {
                   device_printf(self, "Could not setup irq, %d\n", err);
                   sc->ih = NULL;
                   uhci_pci_detach(self);
                   return ENXIO;
           }
           /*
            * Set the PIRQD enable bit and switch off all the others. We don't
            * want legacy support to interfere with us XXX Does this also mean
            * that the BIOS won't touch the keyboard anymore if it is connected
            * to the ports of the root hub?
            */
   #ifdef USB_DEBUG
           if (pci_read_config(self, PCI_LEGSUP, 4) != PCI_LEGSUP_USBPIRQDEN)
                   device_printf(self, "LegSup = 0x%08x\n",
                       pci_read_config(self, PCI_LEGSUP, 4));
   #endif
           pci_write_config(self, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN, 4);
   
           err = uhci_init(sc);
           if (!err)
                   err = device_probe_and_attach(sc->sc_bus.bdev);
   
           if (err) {
                   device_printf(self, "USB init failed\n");
                   uhci_pci_detach(self);
                   return EIO;
           }
           return 0;               /* success */
   }
   
   int
   uhci_pci_detach(device_t self)
   {
           uhci_softc_t *sc = device_get_softc(self);
   
           /*
            * XXX This function is not yet complete and should not be added
            * method list.
            */
   #if 0
           if uhci_init
                   was successful
                       we should call something like uhci_deinit
   #endif
   
           /*
            * disable interrupts that might have been switched on in
            * uhci_init.
            */
           if (sc->iot && sc->ioh)
                   bus_space_write_2(sc->iot, sc->ioh, UHCI_INTR, 0);
   
           if (sc->irq_res && sc->ih) {
                   int err = bus_teardown_intr(self, sc->irq_res, sc->ih);
   
                   if (err)
                           /* XXX or should we panic? */
                           device_printf(self, "Could not tear down irq, %d\n",
                               err);
                   sc->ih = NULL;
           }
           if (sc->sc_bus.bdev) {
                   device_delete_child(self, sc->sc_bus.bdev);
                   sc->sc_bus.bdev = NULL;
           }
           if (sc->irq_res) {
                   bus_release_resource(self, SYS_RES_IRQ, 0, sc->irq_res);
                   sc->irq_res = NULL;
           }
           if (sc->io_res) {
                   bus_release_resource(self, SYS_RES_IOPORT, PCI_UHCI_BASE_REG,
                       sc->io_res);
                   sc->io_res = NULL;
                   sc->iot = 0;
                   sc->ioh = 0;
           }
           return 0;
   }
   
   
   static device_method_t uhci_methods[] = {
           /* Device interface */
           DEVMETHOD(device_probe, uhci_pci_probe),
           DEVMETHOD(device_attach, uhci_pci_attach),
           DEVMETHOD(device_suspend, uhci_pci_suspend),
           DEVMETHOD(device_resume, uhci_pci_resume),
           DEVMETHOD(device_shutdown, bus_generic_shutdown),
   
           /* Bus interface */
           DEVMETHOD(bus_print_child, bus_generic_print_child),
   
           {0, 0}
   };
   
   static driver_t uhci_driver = {
           "uhci",
           uhci_methods,
           sizeof(uhci_softc_t),
   };
   
   static devclass_t uhci_devclass;
   
   DRIVER_MODULE(uhci, pci, uhci_driver, uhci_devclass, 0, 0);

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