260 lines
6.6 KiB
C
260 lines
6.6 KiB
C
/* $NetBSD: isa_machdep.c,v 1.2 2001/04/02 09:54:16 wdk 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 Wayne Knowles
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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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#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 <sys/malloc.h>
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#include <sys/queue.h>
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#include <machine/sysconf.h>
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#include <machine/autoconf.h>
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#include <machine/mainboard.h>
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#include <machine/bus.h>
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#include <dev/isa/isavar.h>
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#include <dev/isa/isareg.h>
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static int isabusprint __P((void *auxp, const char *));
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static int isabusmatch __P((struct device *, struct cfdata *, void *));
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static void isabusattach __P((struct device *, struct device *, void *));
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struct isabus_softc {
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struct device sc_dev;
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struct mipsco_isa_chipset sc_isa_ic;
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};
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struct cfattach isabus_ca = {
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sizeof(struct isabus_softc), isabusmatch, isabusattach
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};
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extern struct cfdriver isabus_cd;
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static struct mipsco_bus_space isa_io_bst, isa_mem_bst, isa_ctl_bst;
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static struct mipsco_bus_dma_tag isa_dmatag;
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static void isa_bus_space_init __P((struct mipsco_bus_space *, const char *,
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paddr_t, size_t));
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int isa_intr __P((void *));
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int
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isabusmatch(pdp, cfp, aux)
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struct device *pdp;
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struct cfdata *cfp;
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void *aux;
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{
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struct confargs *ca = aux;
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if (strcmp(ca->ca_name, isabus_cd.cd_name) != 0)
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return 0;
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return 1;
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}
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static void
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isa_bus_space_init(bst, type, paddr, len)
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struct mipsco_bus_space *bst;
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const char *type;
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paddr_t paddr;
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size_t len;
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{
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vaddr_t vaddr = MIPS_PHYS_TO_KSEG1(paddr); /* XXX */
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/* Setup default bus_space */
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mipsco_bus_space_init(bst, type, paddr, vaddr, 0x0, len);
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/* ISA bus maps 1 word for every byte, therefore stride = 2 */
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mipsco_bus_space_set_aligned_stride(bst, 2);
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/*
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* ISA bus will do an automatic byte swap, but when accessing
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* memory using bus_space_stream functions we need to byte swap
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* to reverse the one performed in hardware
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*/
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bst->bs_bswap = 1;
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bst->bs_intr_establish = (void *)isa_intr_establish;
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printf(" %s %p", type, (void *)vaddr);
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}
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void
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isabusattach(pdp, dp, aux)
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struct device *pdp, *dp;
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void *aux;
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{
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struct isabus_softc *sc = (struct isabus_softc *)dp;
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struct mipsco_isa_chipset *ic = &sc->sc_isa_ic;
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struct isabus_attach_args iba;
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printf(":");
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iba.iba_busname = "isa";
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iba.iba_iot = &isa_io_bst;
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iba.iba_memt = &isa_mem_bst;
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iba.iba_dmat = &isa_dmatag;
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iba.iba_ic = ic;
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isa_bus_space_init(&isa_io_bst, "isa_io", PIZAZZ_ISA_IOBASE,
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PIZAZZ_ISA_IOSIZE);
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isa_bus_space_init(&isa_mem_bst, "isa_mem", PIZAZZ_ISA_MEMBASE,
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PIZAZZ_ISA_MEMSIZE);
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isa_bus_space_init(&isa_ctl_bst, "isa_intr", PIZAZZ_ISA_INTRLATCH,
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sizeof(u_int32_t));
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_bus_dma_tag_init(&isa_dmatag);
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ic->ic_bst = &isa_ctl_bst;
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if (bus_space_map(ic->ic_bst, 0x00000, sizeof(u_int32_t),
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BUS_SPACE_MAP_LINEAR, &ic->ic_bsh) != 0) {
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printf(": can't map intrreg\n");
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return;
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}
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/* Clear ISA interrupt latch */
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bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0);
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evcnt_attach_dynamic(&ic->ic_intrcnt, EVCNT_TYPE_INTR, NULL,
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dp->dv_xname, "intr");
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LIST_INIT(&ic->intr_q);
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(*platform.intr_establish)(SYS_INTR_ATBUS, isa_intr, ic);
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printf("\n");
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config_found(dp, &iba, isabusprint);
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}
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int
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isabusprint(auxp, name)
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void *auxp;
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const char *name;
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{
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if(name == NULL)
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return(UNCONF);
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return(QUIET);
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}
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void
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isa_attach_hook(parent, self, iba)
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struct device *parent, *self;
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struct isabus_attach_args *iba;
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{
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}
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const struct evcnt *
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isa_intr_evcnt(isa_chipset_tag_t ic, int irq)
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{
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/* XXX for now, no evcnt parent reported */
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return NULL;
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}
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void *
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isa_intr_establish(ic, intr, type, level, ih_fun, ih_arg)
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isa_chipset_tag_t ic;
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int intr;
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int type; /* XXX not yet */
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int level; /* XXX not yet */
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int (*ih_fun) __P((void*));
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void *ih_arg;
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{
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struct mipsco_intrhand *ih;
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ih = malloc(sizeof *ih, M_DEVBUF, M_NOWAIT);
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if (ih == NULL)
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panic("isa_intr_establish: malloc failed");
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ih->ih_fun = ih_fun;
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ih->ih_arg = ih_arg;
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LIST_INSERT_HEAD(&ic->intr_q, ih, ih_q);
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return ih;
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}
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void
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isa_intr_disestablish(ic, cookie)
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isa_chipset_tag_t ic;
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void *cookie;
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{
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struct mipsco_intrhand *ih = cookie;
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LIST_REMOVE(ih, ih_q);
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free(ih, M_DEVBUF);
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}
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int
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isa_intr_alloc(ic, mask, type, irq)
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isa_chipset_tag_t ic;
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int mask;
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int type;
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int *irq;
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{
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return 0;
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}
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int
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isa_intr(arg)
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void *arg;
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{
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struct mipsco_isa_chipset *ic = (struct mipsco_isa_chipset *)arg;
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struct mipsco_intrhand *ih;
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int rv, handled;
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ic->ic_intrcnt.ev_count++;
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handled = 0;
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LIST_FOREACH(ih, &ic->intr_q, ih_q) {
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/*
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* The handler returns one of three values:
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* 0: This interrupt wasn't for me.
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* 1: This interrupt was for me.
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* -1: This interrupt might have been for me, but I can't say
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* for sure.
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*/
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rv = (*ih->ih_fun)(ih->ih_arg);
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handled |= (rv != 0);
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}
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/* Clear ISA interrupt latch */
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bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0);
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return handled;
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}
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