1 /* $NetBSD: gapspci.c,v 1.3 2002/05/16 01:01:35 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 Marcus Comstedt 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Marcus Comstedt. 18 * 4. Neither the name of The NetBSD Foundation nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/device.h> 41 #include <sys/malloc.h> 42 #include <sys/conf.h> 43 #include <sys/mbuf.h> 44 45 #include <machine/cpu.h> 46 #include <machine/bus.h> 47 48 #include <dev/pci/pcivar.h> 49 #include <dev/pci/pcireg.h> 50 51 #include <dev/pci/pcidevs.h> 52 53 #include <dreamcast/dev/g2/g2busvar.h> 54 #include <dreamcast/dev/g2/gapspcivar.h> 55 56 int gaps_match(struct device *, struct cfdata *, void *); 57 void gaps_attach(struct device *, struct device *, void *); 58 59 int gaps_print(void *, const char *); 60 61 struct cfattach gapspci_ca = { 62 sizeof(struct gaps_softc), 63 gaps_match, 64 gaps_attach, 65 }; 66 67 int 68 gaps_match(struct device *parent, struct cfdata *match, void *aux) 69 { 70 struct g2bus_attach_args *ga = aux; 71 char idbuf[16]; 72 bus_space_handle_t tmp_memh; 73 74 if(strcmp("gapspci", match->cf_driver->cd_name)) 75 return 0; 76 77 if (bus_space_map(ga->ga_memt, 0x01001400, 0x100, 0, &tmp_memh) != 0) 78 return 0; 79 80 bus_space_read_region_1(ga->ga_memt, tmp_memh, 0, 81 idbuf, sizeof(idbuf)); 82 83 bus_space_unmap(ga->ga_memt, tmp_memh, 0x100); 84 85 if(strncmp(idbuf, "GAPSPCI_BRIDGE_2", 16)) 86 return 0; 87 88 return (1); 89 } 90 91 void 92 gaps_attach(struct device *parent, struct device *self, void *aux) 93 { 94 struct g2bus_attach_args *ga = aux; 95 struct gaps_softc *sc = (void *) self; 96 struct pcibus_attach_args pba; 97 int i; 98 99 printf(": SEGA GAPS PCI Bridge\n"); 100 101 sc->sc_memt = ga->ga_memt; 102 103 sc->sc_dmabase = 0x1840000; 104 sc->sc_dmasize = 32768; 105 106 if (bus_space_map(sc->sc_memt, 0x01001400, 0x100, 107 0, &sc->sc_gaps_memh) != 0) 108 panic("gaps_attach: can't map GAPS register space"); 109 110 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x18, 0x5a14a501); 111 112 for(i=0; i<1000000; i++) 113 ; 114 115 if(bus_space_read_4(sc->sc_memt, sc->sc_gaps_memh, 0x18) != 1) 116 panic("gaps_attach: GAPS PCI bridge not responding"); 117 118 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x20, 0x1000000); 119 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x24, 0x1000000); 120 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x28, sc->sc_dmabase); 121 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x2c, 122 sc->sc_dmabase + sc->sc_dmasize); 123 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x14, 1); 124 bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x34, 1); 125 126 gaps_pci_init(sc); 127 gaps_dma_init(sc); 128 129 memset(&pba, 0, sizeof(pba)); 130 131 pba.pba_busname = "pci"; 132 pba.pba_memt = sc->sc_memt; 133 pba.pba_dmat = &sc->sc_dmat; 134 pba.pba_bus = 0; 135 pba.pba_bridgetag = NULL; 136 pba.pba_flags = PCI_FLAGS_MEM_ENABLED; 137 pba.pba_pc = &sc->sc_pc; 138 139 (void) config_found(self, &pba, gaps_print); 140 } 141 142 int 143 gaps_print(void *aux, const char *pnp) 144 { 145 struct pcibus_attach_args *pba = aux; 146 147 if (pnp) 148 printf("%s at %s", pba->pba_busname, pnp); 149 printf(" bus %d", pba->pba_bus); 150 151 return (UNCONF); 152 } 153