G2 bus support. Low level stuff by Marcus, bus_space stuff by me.
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thorpej
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2486582227
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/* $NetBSD: g2bus.c,v 1.1 2001/01/31 18:33:24 thorpej 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/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <dreamcast/dev/g2/g2busvar.h>
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int g2busmatch(struct device *, struct cfdata *, void *);
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void g2busattach(struct device *, struct device *, void *);
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int g2busprint(void *, const char *);
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struct cfattach g2bus_ca = {
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sizeof(struct g2bus_softc), g2busmatch, g2busattach
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};
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int g2bussearch(struct device *, struct cfdata *, void *);
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int
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g2busmatch(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct shb_attach_args *sa = aux;
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if (strcmp("g2bus", cf->cf_driver->cd_name))
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return (0);
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sa->ia_iosize = 0 /* */;
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return (1);
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}
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void
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g2busattach(struct device *parent, struct device *self, void *aux)
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{
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struct g2bus_softc *sc = (void *) self;
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struct g2bus_attach_args ga;
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printf("\n");
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TAILQ_INIT(&sc->sc_subdevs);
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g2bus_bus_mem_init(sc);
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ga.ga_memt = &sc->sc_memt;
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config_search(g2bussearch, self, &ga);
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}
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int
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g2busprint(void *aux, const char *pnp)
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{
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return (UNCONF);
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}
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int
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g2bussearch(struct device *parent, struct cfdata *cf, void *aux)
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{
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if ((*cf->cf_attach->ca_match)(parent, cf, aux) > 0)
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config_attach(parent, cf, aux, g2busprint);
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return (0);
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}
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/* $NetBSD: g2bus_bus_mem.c,v 1.1 2001/01/31 18:33:24 thorpej Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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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 the NetBSD
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* Foundation, Inc. and its contributors.
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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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/*
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* Bus space implementation for the SEGA G2 bus.
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*
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* NOTE: We only implement a small subset of what the bus_space(9)
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* API specifies. Right now, the GAPS PCI bridge is only used for
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* the Dreamcast Broadband Adatper, so we only provide what the
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* pci(4) and rtk(4) drivers need.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.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 <dreamcast/dev/g2/g2busvar.h>
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int g2bus_bus_mem_map(void *, bus_addr_t, bus_size_t, int,
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bus_space_handle_t *);
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void g2bus_bus_mem_unmap(void *, bus_space_handle_t, bus_size_t);
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u_int8_t g2bus_bus_mem_read_1(void *, bus_space_handle_t, bus_size_t);
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u_int16_t g2bus_bus_mem_read_2(void *, bus_space_handle_t, bus_size_t);
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u_int32_t g2bus_bus_mem_read_4(void *, bus_space_handle_t, bus_size_t);
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void g2bus_bus_mem_write_1(void *, bus_space_handle_t, bus_size_t,
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u_int8_t);
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void g2bus_bus_mem_write_2(void *, bus_space_handle_t, bus_size_t,
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u_int16_t);
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void g2bus_bus_mem_write_4(void *, bus_space_handle_t, bus_size_t,
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u_int32_t);
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void
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g2bus_bus_mem_init(struct g2bus_softc *sc)
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{
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bus_space_tag_t t = &sc->sc_memt;
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memset(t, 0, sizeof(*t));
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t->dbs_map = g2bus_bus_mem_map;
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t->dbs_unmap = g2bus_bus_mem_unmap;
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t->dbs_r_1 = g2bus_bus_mem_read_1;
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t->dbs_r_2 = g2bus_bus_mem_read_2;
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t->dbs_r_4 = g2bus_bus_mem_read_4;
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t->dbs_w_1 = g2bus_bus_mem_write_1;
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t->dbs_w_2 = g2bus_bus_mem_write_2;
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t->dbs_w_4 = g2bus_bus_mem_write_4;
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}
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int
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g2bus_bus_mem_map(void *v, bus_addr_t addr, bus_size_t size, int flags,
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bus_space_handle_t *shp)
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{
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KASSERT((addr & SH3_PHYS_MASK) == addr);
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*shp = SH3_PHYS_TO_P2SEG(addr);
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return (0);
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}
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void
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g2bus_bus_mem_unmap(void *v, bus_space_handle_t sh, bus_size_t size)
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{
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KASSERT(sh >= SH3_P2SEG_BASE && sh <= SH3_P2SEG_END);
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/* Nothing to do. */
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}
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/*
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* XXX NEED TO ADD THE LOCKING STUFF THAT MARCUS MENTIONED!
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*/
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u_int8_t
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g2bus_bus_mem_read_1(void *v, bus_space_handle_t sh, bus_size_t off)
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{
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u_int8_t rv;
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rv = *(u_int8_t *)(sh + off);
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return (rv);
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}
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u_int16_t
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g2bus_bus_mem_read_2(void *v, bus_space_handle_t sh, bus_size_t off)
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{
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u_int16_t rv;
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rv = *(u_int16_t *)(sh + off);
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return (rv);
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}
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u_int32_t
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g2bus_bus_mem_read_4(void *v, bus_space_handle_t sh, bus_size_t off)
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{
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u_int32_t rv;
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rv = *(u_int32_t *)(sh + off);
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return (rv);
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}
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void
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g2bus_bus_mem_write_1(void *v, bus_space_handle_t sh, bus_size_t off,
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u_int8_t val)
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{
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*(u_int8_t *)(sh + off) = val;
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}
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void
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g2bus_bus_mem_write_2(void *v, bus_space_handle_t sh, bus_size_t off,
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u_int16_t val)
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{
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*(u_int16_t *)(sh + off) = val;
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}
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void
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g2bus_bus_mem_write_4(void *v, bus_space_handle_t sh, bus_size_t off,
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u_int32_t val)
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{
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*(u_int32_t *)(sh + off) = val;
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}
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@ -0,0 +1,68 @@
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/* $NetBSD: g2busvar.h,v 1.1 2001/01/31 18:33:24 thorpej 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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#ifndef _DREAMCAST_G2BUSVAR_H_
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#define _DREAMCAST_G2BUSVAR_H_
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#include <sh3/shbvar.h>
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/*
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* G2 driver attach arguments
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*/
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struct g2bus_attach_args {
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bus_space_tag_t ga_memt;
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};
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/*
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* Per-device G2 variables
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*/
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struct g2busdev {
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struct device *gd_dev; /* back pointer to generic */
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TAILQ_ENTRY(g2busdev)
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gd_bchain; /* bus chain */
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};
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/*
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* G2 master bus
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*/
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struct g2bus_softc {
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struct device sc_dev; /* base device */
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struct dreamcast_bus_space sc_memt;
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TAILQ_HEAD(, g2busdev)
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sc_subdevs; /* list of all children */
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};
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void g2bus_bus_mem_init(struct g2bus_softc *);
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#endif /* _DREAMCAST_SHBVAR_H_ */
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