1 /* $NetBSD: joy_pci.c,v 1.5 2002/10/02 16:51:42 thorpej 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: joy_pci.c,v 1.5 2002/10/02 16:51:42 thorpej Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/device.h> 46 47 #include <machine/bus.h> 48 49 #include <dev/pci/pcireg.h> 50 #include <dev/pci/pcivar.h> 51 #include <dev/pci/pcidevs.h> 52 53 #include <dev/ic/joyvar.h> 54 55 int joy_pci_match __P((struct device *, struct cfdata *, void *)); 56 void joy_pci_attach __P((struct device *, struct device *, void *)); 57 static int bar_is_io __P((pci_chipset_tag_t pc, pcitag_t tag, int reg)); 58 59 CFATTACH_DECL(joy_pci, sizeof(struct joy_softc), 60 joy_pci_match, joy_pci_attach, NULL, NULL); 61 62 int 63 joy_pci_match(parent, match, aux) 64 struct device *parent; 65 struct cfdata *match; 66 void *aux; 67 { 68 struct pci_attach_args *pa = aux; 69 70 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_INPUT && 71 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_INPUT_GAMEPORT && 72 PCI_INTERFACE(pa->pa_class) == 0x10) 73 return (1); 74 75 return (0); 76 } 77 78 /* check if this BAR assigns/requests IO space */ 79 static int 80 bar_is_io(pc, tag, reg) 81 pci_chipset_tag_t pc; 82 pcitag_t tag; 83 int reg; 84 { 85 pcireg_t address, mask; 86 int s; 87 88 /* 89 * The splhigh() is not realy necessary at autoconfig time, 90 * but maybe useful if used in lkm context later. 91 */ 92 s = splhigh(); 93 address = pci_conf_read(pc, tag, reg); 94 pci_conf_write(pc, tag, reg, 0xffffffff); 95 mask = pci_conf_read(pc, tag, reg); 96 pci_conf_write(pc, tag, reg, address); 97 splx(s); 98 99 return (PCI_MAPREG_TYPE(address) == PCI_MAPREG_TYPE_IO && PCI_MAPREG_IO_SIZE(mask) > 0); 100 } 101 102 void 103 joy_pci_attach(parent, self, aux) 104 struct device *parent, *self; 105 void *aux; 106 { 107 struct joy_softc *sc = (struct joy_softc *)self; 108 struct pci_attach_args *pa = aux; 109 char devinfo[256]; 110 bus_size_t mapsize; 111 int reg; 112 113 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo); 114 printf(": %s (rev 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class)); 115 116 for (reg = PCI_MAPREG_START; reg < PCI_MAPREG_END; reg++) 117 if (bar_is_io(pa->pa_pc, pa->pa_tag, reg)) 118 break; 119 if (reg >= PCI_MAPREG_END) { 120 printf("%s: violates PCI spec, no IO region found\n", sc->sc_dev.dv_xname); 121 return; 122 } 123 124 if (pci_mapreg_map(pa, reg, PCI_MAPREG_TYPE_IO, 0, 125 &sc->sc_iot, &sc->sc_ioh, NULL, &mapsize)) { 126 printf("%s: could not map IO space\n", sc->sc_dev.dv_xname); 127 return; 128 } 129 130 if (mapsize != 2) { 131 if (!bus_space_subregion(sc->sc_iot, sc->sc_ioh, 1, 1, &sc->sc_ioh) < 0) { 132 printf("%s: error mapping subregion\n", sc->sc_dev.dv_xname); 133 return; 134 } 135 } 136 137 joyattach(sc); 138 } 139