FreeBSD/Linux Kernel Cross Reference
sys/dev/pci/joy_pci.c

     /*      $NetBSD: joy_pci.c,v 1.7.2.1 2004/04/05 20:29:56 tron Exp $     */
     
     /*-
      * Copyright (c) 2000 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Martin Husemann <martin@NetBSD.org>.
      *
     * 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.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: joy_pci.c,v 1.7.2.1 2004/04/05 20:29:56 tron Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/device.h>
    
    #include <machine/bus.h>
    
    #include <dev/pci/pcireg.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcidevs.h>
    
    #include <dev/ic/joyvar.h>
    
    int     joy_pci_match __P((struct device *, struct cfdata *, void *));
    void    joy_pci_attach __P((struct device *, struct device *, void *));
    static int bar_is_io __P((pci_chipset_tag_t pc, pcitag_t tag, int reg));
    
    CFATTACH_DECL(joy_pci, sizeof(struct joy_softc),
        joy_pci_match, joy_pci_attach, NULL, NULL);
    
    int
    joy_pci_match(parent, match, aux)
            struct device *parent;
            struct cfdata *match;
            void *aux;
    {
            struct pci_attach_args *pa = aux;
    
            if (PCI_CLASS(pa->pa_class) == PCI_CLASS_INPUT &&
                PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_INPUT_GAMEPORT &&
                PCI_INTERFACE(pa->pa_class) == 0x10)
                    return (1);
    
            if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CREATIVELABS &&
                (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CREATIVELABS_SBJOY ||
                 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CREATIVELABS_SBJOY2))
            {
                    return (1);
            }
    
            return (0);
    }
    
    /* check if this BAR assigns/requests IO space */
    static int
    bar_is_io(pc, tag, reg)
            pci_chipset_tag_t pc;
            pcitag_t tag;
            int reg;
    {
            pcireg_t address, mask;
            int s;
    
            /*
             * The splhigh() is not realy necessary at autoconfig time,
             * but maybe useful if used in lkm context later.
             */
            s = splhigh();
           address = pci_conf_read(pc, tag, reg);
           pci_conf_write(pc, tag, reg, 0xffffffff);
           mask = pci_conf_read(pc, tag, reg);
           pci_conf_write(pc, tag, reg, address);
           splx(s);
   
           return (PCI_MAPREG_TYPE(address) == PCI_MAPREG_TYPE_IO && PCI_MAPREG_IO_SIZE(mask) > 0);
   }
   
   void
   joy_pci_attach(parent, self, aux)
           struct device *parent, *self;
           void *aux;
   {
           struct joy_softc *sc = (struct joy_softc *)self;
           struct pci_attach_args *pa = aux;
           char devinfo[256];
           bus_size_t mapsize;
           int reg;
   
           pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
           printf(": %s (rev 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class));
   
           for (reg = PCI_MAPREG_START; reg < PCI_MAPREG_END; reg++)
                   if (bar_is_io(pa->pa_pc, pa->pa_tag, reg))
                           break;
           if (reg >= PCI_MAPREG_END) {
                   printf("%s: violates PCI spec, no IO region found\n", sc->sc_dev.dv_xname);
                   return;
           }
   
           if (pci_mapreg_map(pa, reg, PCI_MAPREG_TYPE_IO, 0,
               &sc->sc_iot, &sc->sc_ioh, NULL, &mapsize)) {
                   printf("%s: could not map IO space\n", sc->sc_dev.dv_xname);
                   return;
           }
   
           if (mapsize != 2) {
                   if (!bus_space_subregion(sc->sc_iot, sc->sc_ioh, 1, 1, &sc->sc_ioh) < 0) {
                           printf("%s: error mapping subregion\n", sc->sc_dev.dv_xname);
                           return;
                   }
           }
   
           joyattach(sc);
   }

Cache object: 432a48fd445f8f01a2d108ec23062865