134 lines
4.4 KiB
C
134 lines
4.4 KiB
C
/* $NetBSD: gapspci.c,v 1.12 2004/08/30 15:05:16 drochner Exp $ */
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/*-
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* Copyright (c) 2001 Marcus Comstedt
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Marcus Comstedt.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: gapspci.c,v 1.12 2004/08/30 15:05:16 drochner Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <sys/conf.h>
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#include <sys/mbuf.h>
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#include <machine/cpu.h>
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#include <machine/bus.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcidevs.h>
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#include <dreamcast/dev/g2/g2busvar.h>
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#include <dreamcast/dev/g2/gapspcivar.h>
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int gaps_match(struct device *, struct cfdata *, void *);
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void gaps_attach(struct device *, struct device *, void *);
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CFATTACH_DECL(gapspci, sizeof(struct gaps_softc),
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gaps_match, gaps_attach, NULL, NULL);
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int
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gaps_match(struct device *parent, struct cfdata *match, void *aux)
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{
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struct g2bus_attach_args *ga = aux;
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char idbuf[16];
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bus_space_handle_t tmp_memh;
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if (bus_space_map(ga->ga_memt, 0x01001400, 0x100, 0, &tmp_memh) != 0)
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return 0;
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bus_space_read_region_1(ga->ga_memt, tmp_memh, 0,
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idbuf, sizeof(idbuf));
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bus_space_unmap(ga->ga_memt, tmp_memh, 0x100);
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if(strncmp(idbuf, "GAPSPCI_BRIDGE_2", 16))
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return 0;
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return (1);
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}
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void
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gaps_attach(struct device *parent, struct device *self, void *aux)
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{
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struct g2bus_attach_args *ga = aux;
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struct gaps_softc *sc = (void *) self;
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struct pcibus_attach_args pba;
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int i;
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printf(": SEGA GAPS PCI Bridge\n");
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sc->sc_memt = ga->ga_memt;
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sc->sc_dmabase = 0x1840000;
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sc->sc_dmasize = 32768;
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if (bus_space_map(sc->sc_memt, 0x01001400, 0x100,
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0, &sc->sc_gaps_memh) != 0)
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panic("gaps_attach: can't map GAPS register space");
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bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x18, 0x5a14a501);
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for(i=0; i<1000000; i++)
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;
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if(bus_space_read_4(sc->sc_memt, sc->sc_gaps_memh, 0x18) != 1)
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panic("gaps_attach: GAPS PCI bridge not responding");
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bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x20, 0x1000000);
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bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x24, 0x1000000);
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bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x28, sc->sc_dmabase);
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bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x2c,
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sc->sc_dmabase + sc->sc_dmasize);
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bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x14, 1);
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bus_space_write_4(sc->sc_memt, sc->sc_gaps_memh, 0x34, 1);
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gaps_pci_init(sc);
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gaps_dma_init(sc);
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memset(&pba, 0, sizeof(pba));
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pba.pba_memt = sc->sc_memt;
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pba.pba_dmat = &sc->sc_dmat;
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pba.pba_dmat64 = NULL;
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pba.pba_bus = 0;
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pba.pba_bridgetag = NULL;
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pba.pba_flags = PCI_FLAGS_MEM_ENABLED;
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pba.pba_pc = &sc->sc_pc;
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(void) config_found_ia(self, "pcibus", &pba, pcibusprint);
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}
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