sys/dev/pci/joy_pci.c

   1 /*      $NetBSD: joy_pci.c,v 1.16 2008/03/26 18:27:07 xtraeme Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Martin Husemann <martin@NetBSD.org>.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: joy_pci.c,v 1.16 2008/03/26 18:27:07 xtraeme Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/device.h>
  39
  40 #include <sys/bus.h>
  41
  42 #include <dev/pci/pcireg.h>
  43 #include <dev/pci/pcivar.h>
  44 #include <dev/pci/pcidevs.h>
  45
  46 #include <dev/ic/joyvar.h>
  47
  48 static int bar_is_io(pci_chipset_tag_t pc, pcitag_t tag, int reg);
  49
  50 static int
  51 joy_pci_match(device_t parent, cfdata_t match, void *aux)
  52 {
  53         struct pci_attach_args *pa = aux;
  54
  55         if (PCI_CLASS(pa->pa_class) == PCI_CLASS_INPUT &&
  56             PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_INPUT_GAMEPORT &&
  57             PCI_INTERFACE(pa->pa_class) == 0x10)
  58                 return 1;
  59
  60         if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CREATIVELABS &&
  61             (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CREATIVELABS_SBJOY ||
  62              PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CREATIVELABS_SBJOY2))
  63                 return 1;
  64
  65         return 0;
  66 }
  67
  68 /* check if this BAR assigns/requests IO space */
  69 static int
  70 bar_is_io(pci_chipset_tag_t pc, pcitag_t tag, int reg)
  71 {
  72         pcireg_t address, mask;
  73         int s;
  74
  75         /*
  76          * The splhigh() is not realy necessary at autoconfig time,
  77          * but maybe useful if used in lkm context later.
  78          */
  79         s = splhigh();
  80         address = pci_conf_read(pc, tag, reg);
  81         pci_conf_write(pc, tag, reg, 0xffffffff);
  82         mask = pci_conf_read(pc, tag, reg);
  83         pci_conf_write(pc, tag, reg, address);
  84         splx(s);
  85
  86         return (PCI_MAPREG_TYPE(address) == PCI_MAPREG_TYPE_IO && PCI_MAPREG_IO_SIZE(mask) > 0);
  87 }
  88
  89 static void
  90 joy_pci_attach(device_t parent, device_t self, void *aux)
  91 {
  92         struct joy_softc *sc = device_private(self);
  93         struct pci_attach_args *pa = aux;
  94         char devinfo[256];
  95         bus_size_t mapsize;
  96         int reg;
  97
  98         pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
  99         aprint_normal(": %s (rev 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class));
 100
 101         for (reg = PCI_MAPREG_START; reg < PCI_MAPREG_END;
 102              reg += sizeof(pcireg_t))
 103                 if (bar_is_io(pa->pa_pc, pa->pa_tag, reg))
 104                         break;
 105         if (reg >= PCI_MAPREG_END) {
 106                 aprint_error_dev(self,
 107                     "violates PCI spec, no IO region found\n");
 108                 return;
 109         }
 110
 111         if (pci_mapreg_map(pa, reg, PCI_MAPREG_TYPE_IO, 0,
 112             &sc->sc_iot, &sc->sc_ioh, NULL, &mapsize)) {
 113                 aprint_error_dev(self, "could not map IO space\n");
 114                 return;
 115         }
 116
 117         if (mapsize != 2) {
 118                 if (!bus_space_subregion(sc->sc_iot, sc->sc_ioh, 1, 1, &sc->sc_ioh) < 0) {
 119                         aprint_error_dev(self, "error mapping subregion\n");
 120                         return;
 121                 }
 122         }
 123
 124         sc->sc_dev = self;
 125
 126         joyattach(sc);
 127 }
 128
 129 CFATTACH_DECL_NEW(joy_pci, sizeof(struct joy_softc),
 130     joy_pci_match, joy_pci_attach, NULL, NULL);