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joy_pci.c revision 1.18 
      1 /*	$NetBSD: joy_pci.c,v 1.18 2011/11/23 23:07:35 jmcneill Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000, 2008 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 (at) 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 1.18 2011/11/23 23:07:35 jmcneill 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 struct joy_pci_softc {
     49 	struct joy_softc sc_joy;
     50 	kmutex_t sc_lock;
     51 };
     52 
     53 static int bar_is_io(pci_chipset_tag_t pc, pcitag_t tag, int reg);
     54 
     55 static int
     56 joy_pci_match(device_t parent, cfdata_t match, void *aux)
     57 {
     58 	struct pci_attach_args *pa = aux;
     59 
     60 	if (PCI_CLASS(pa->pa_class) == PCI_CLASS_INPUT &&
     61 	    PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_INPUT_GAMEPORT &&
     62 	    PCI_INTERFACE(pa->pa_class) == 0x10)
     63 		return 1;
     64 
     65 	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CREATIVELABS &&
     66 	    (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CREATIVELABS_SBJOY ||
     67 	     PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CREATIVELABS_SBJOY2))
     68 		return 1;
     69 
     70 	return 0;
     71 }
     72 
     73 /* check if this BAR assigns/requests IO space */
     74 static int
     75 bar_is_io(pci_chipset_tag_t pc, pcitag_t tag, int reg)
     76 {
     77 	pcireg_t address, mask;
     78 
     79 	address = pci_conf_read(pc, tag, reg);
     80 	pci_conf_write(pc, tag, reg, 0xffffffff);
     81 	mask = pci_conf_read(pc, tag, reg);
     82 	pci_conf_write(pc, tag, reg, address);
     83 
     84 	return (PCI_MAPREG_TYPE(address) == PCI_MAPREG_TYPE_IO &&
     85 	    PCI_MAPREG_IO_SIZE(mask) > 0);
     86 }
     87 
     88 static void
     89 joy_pci_attach(device_t parent, device_t self, void *aux)
     90 {
     91 	struct joy_softc *sc = device_private(self);
     92 	struct joy_pci_softc *psc = 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,
    119 		    &sc->sc_ioh) < 0) {
    120 			aprint_error_dev(self, "error mapping subregion\n");
    121 			return;
    122 		}
    123 	}
    124 
    125 	mutex_init(&psc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
    126 	sc->sc_dev = self;
    127 	sc->sc_lock = &psc->sc_lock;
    128 
    129 	joyattach(sc);
    130 }
    131 
    132 CFATTACH_DECL_NEW(joy_pci, sizeof(struct joy_pci_softc),
    133     joy_pci_match, joy_pci_attach, NULL, NULL);
    134