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 * 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 1.16 2008/03/26 18:27:07 xtraeme 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 <sys/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 static int bar_is_io(pci_chipset_tag_t pc, pcitag_t tag, int reg); 56 57 static int 58 joy_pci_match(device_t parent, cfdata_t match, void *aux) 59 { 60 struct pci_attach_args *pa = aux; 61 62 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_INPUT && 63 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_INPUT_GAMEPORT && 64 PCI_INTERFACE(pa->pa_class) == 0x10) 65 return 1; 66 67 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CREATIVELABS && 68 (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CREATIVELABS_SBJOY || 69 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CREATIVELABS_SBJOY2)) 70 return 1; 71 72 return 0; 73 } 74 75 /* check if this BAR assigns/requests IO space */ 76 static int 77 bar_is_io(pci_chipset_tag_t pc, pcitag_t tag, int reg) 78 { 79 pcireg_t address, mask; 80 int s; 81 82 /* 83 * The splhigh() is not realy necessary at autoconfig time, 84 * but maybe useful if used in lkm context later. 85 */ 86 s = splhigh(); 87 address = pci_conf_read(pc, tag, reg); 88 pci_conf_write(pc, tag, reg, 0xffffffff); 89 mask = pci_conf_read(pc, tag, reg); 90 pci_conf_write(pc, tag, reg, address); 91 splx(s); 92 93 return (PCI_MAPREG_TYPE(address) == PCI_MAPREG_TYPE_IO && PCI_MAPREG_IO_SIZE(mask) > 0); 94 } 95 96 static void 97 joy_pci_attach(device_t parent, device_t self, void *aux) 98 { 99 struct joy_softc *sc = device_private(self); 100 struct pci_attach_args *pa = aux; 101 char devinfo[256]; 102 bus_size_t mapsize; 103 int reg; 104 105 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 106 aprint_normal(": %s (rev 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class)); 107 108 for (reg = PCI_MAPREG_START; reg < PCI_MAPREG_END; 109 reg += sizeof(pcireg_t)) 110 if (bar_is_io(pa->pa_pc, pa->pa_tag, reg)) 111 break; 112 if (reg >= PCI_MAPREG_END) { 113 aprint_error_dev(self, 114 "violates PCI spec, no IO region found\n"); 115 return; 116 } 117 118 if (pci_mapreg_map(pa, reg, PCI_MAPREG_TYPE_IO, 0, 119 &sc->sc_iot, &sc->sc_ioh, NULL, &mapsize)) { 120 aprint_error_dev(self, "could not map IO space\n"); 121 return; 122 } 123 124 if (mapsize != 2) { 125 if (!bus_space_subregion(sc->sc_iot, sc->sc_ioh, 1, 1, &sc->sc_ioh) < 0) { 126 aprint_error_dev(self, "error mapping subregion\n"); 127 return; 128 } 129 } 130 131 sc->sc_dev = self; 132 133 joyattach(sc); 134 } 135 136 CFATTACH_DECL_NEW(joy_pci, sizeof(struct joy_softc), 137 joy_pci_match, joy_pci_attach, NULL, NULL); 138