378 lines
9.3 KiB
C
378 lines
9.3 KiB
C
/* $NetBSD: isa_machdep.c,v 1.15 2001/06/11 05:22:10 enami Exp $ */
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/*
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* Copyright (c) 1999, by UCHIYAMA Yasushi
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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. The name of the developer may NOT be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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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/reboot.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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#include <machine/platid.h>
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#include <machine/platid_mask.h>
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#include <dev/hpc/hpciovar.h>
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#include <hpcmips/hpcmips/machdep.h>
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#include "opt_vr41xx.h"
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#include <hpcmips/vr/vrcpudef.h>
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#include <hpcmips/vr/vripreg.h>
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#include <hpcmips/vr/vripvar.h>
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#include "locators.h"
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#define VRISADEBUG
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#ifdef VRISADEBUG
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#ifndef VRISADEBUG_CONF
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#define VRISADEBUG_CONF 0
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#endif /* VRISADEBUG_CONF */
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int vrisa_debug = VRISADEBUG_CONF;
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#define DPRINTF(arg) if (vrisa_debug) printf arg;
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#define DBITDISP32(mask) if (vrisa_debug) bitdisp32(mask);
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#define VPRINTF(arg) if (bootverbose || vrisa_debug) printf arg;
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#else /* VRISADEBUG */
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#define DPRINTF(arg)
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#define DBITDISP32(mask)
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#define VPRINTF(arg) if (bootverbose) printf arg;
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#endif /* VRISADEBUG */
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/*
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* intrrupt no. encoding:
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*
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* 0x0000000f ISA IRQ#
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* 0x00ff0000 GPIO port#
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* 0x01000000 interrupt signal hold/through (1:hold/0:though)
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* 0x02000000 interrupt detection level (1:low /0:high )
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* 0x04000000 interrupt detection trigger (1:edge/0:level )
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*/
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#define INTR_IRQ(i) (((i)>> 0) & 0x0f)
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#define INTR_PORT(i) (((i)>>16) & 0xff)
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#define INTR_MODE(i) (((i)>>24) & 0x07)
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#define INTR_NIRQS 16
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int vrisabprint __P((void*, const char*));
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int vrisabmatch __P((struct device*, struct cfdata*, void*));
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void vrisabattach __P((struct device*, struct device*, void*));
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struct vrisab_softc {
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struct device sc_dev;
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hpcio_chip_t sc_hc;
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int sc_intr_map[INTR_NIRQS]; /* ISA <-> GIU inerrupt line mapping */
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struct hpcmips_isa_chipset sc_isa_ic;
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};
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struct cfattach vrisab_ca = {
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sizeof(struct vrisab_softc), vrisabmatch, vrisabattach
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};
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#ifdef DEBUG_FIND_PCIC
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#include <mips/cpuregs.h>
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#warning DEBUG_FIND_PCIC
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static void __find_pcic __P((void));
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#endif
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#ifdef DEBUG_FIND_COMPORT
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#include <mips/cpuregs.h>
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#include <dev/ic/ns16550reg.h>
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#include <dev/ic/comreg.h>
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#warning DEBUG_FIND_COMPORT
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static void __find_comport __P((void));
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#endif
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int
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vrisabmatch(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct hpcio_attach_args *haa = aux;
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platid_mask_t mask;
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if (strcmp(haa->haa_busname, match->cf_driver->cd_name))
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return 0;
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if (match->cf_loc[HPCIOIFCF_PLATFORM] == HPCIOIFCF_PLATFORM_DEFAULT)
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return 1;
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mask = PLATID_DEREF(match->cf_loc[HPCIOIFCF_PLATFORM]);
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if (platid_match(&platid, &mask))
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return 2;
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return 0;
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}
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void
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vrisabattach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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struct hpcio_attach_args *haa = aux;
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struct vrisab_softc *sc = (void*)self;
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struct isabus_attach_args iba;
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bus_addr_t offset;
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int i;
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sc->sc_hc = (*haa->haa_getchip)(haa->haa_sc, VRIP_IOCHIP_VRGIU);
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sc->sc_isa_ic.ic_sc = sc;
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iba.iba_busname = "isa";
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iba.iba_ic = &sc->sc_isa_ic;
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iba.iba_dmat = 0; /* XXX not yet */
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/* Allocate ISA memory space */
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iba.iba_memt = hpcmips_alloc_bus_space_tag();
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strcpy(iba.iba_memt->t_name, "ISA mem");
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offset = sc->sc_dev.dv_cfdata->cf_loc[VRISABIFCF_ISAMEMOFFSET];
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iba.iba_memt->t_base = VR_ISA_MEM_BASE + offset;
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iba.iba_memt->t_size = VR_ISA_MEM_SIZE - offset;
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hpcmips_init_bus_space_extent(iba.iba_memt);
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/* Allocate ISA port space */
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iba.iba_iot = hpcmips_alloc_bus_space_tag();
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strcpy(iba.iba_iot->t_name, "ISA port");
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/* Platform dependent setting. */
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offset = sc->sc_dev.dv_cfdata->cf_loc[VRISABIFCF_ISAPORTOFFSET];
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iba.iba_iot->t_base = VR_ISA_PORT_BASE + offset;
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iba.iba_iot->t_size = VR_ISA_PORT_SIZE - offset;
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hpcmips_init_bus_space_extent(iba.iba_iot);
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#ifdef DEBUG_FIND_PCIC
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#warning DEBUG_FIND_PCIC
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__find_pcic();
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#else
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/* Initialize ISA IRQ <-> GPIO mapping */
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for (i = 0; i < INTR_NIRQS; i++)
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sc->sc_intr_map[i] = -1;
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printf(": ISA port %#x-%#x mem %#x-%#x\n",
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iba.iba_iot->t_base, iba.iba_iot->t_base + iba.iba_iot->t_size,
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iba.iba_memt->t_base, iba.iba_memt->t_base + iba.iba_memt->t_size);
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config_found(self, &iba, vrisabprint);
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#endif
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#ifdef DEBUG_FIND_COMPORT
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#warning DEBUG_FIND_COMPORT
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__find_comport();
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#endif
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}
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int
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vrisabprint(aux, pnp)
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void *aux;
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const char *pnp;
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{
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if (pnp)
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return (QUIET);
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return (UNCONF);
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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 vrisab_softc *sc = ic->ic_sc;
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int port, irq, mode;
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static int intr_modes[8] = {
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HPCIO_INTR_LEVEL_HIGH_THROUGH,
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HPCIO_INTR_LEVEL_HIGH_HOLD,
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HPCIO_INTR_LEVEL_LOW_THROUGH,
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HPCIO_INTR_LEVEL_LOW_HOLD,
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HPCIO_INTR_EDGE_THROUGH,
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HPCIO_INTR_EDGE_HOLD,
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HPCIO_INTR_EDGE_THROUGH,
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HPCIO_INTR_EDGE_HOLD,
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};
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#ifdef VRISADEBUG
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static char* intr_mode_names[8] = {
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"level high through",
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"level high hold",
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"level low through",
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"level low hold",
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"edge through",
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"edge hold",
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"edge through",
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"edge hold",
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};
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#endif /* VRISADEBUG */
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/*
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* ISA IRQ <-> GPIO port mapping
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*/
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irq = INTR_IRQ(intr);
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if (sc->sc_intr_map[irq] != -1) {
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/* already mapped */
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intr = sc->sc_intr_map[irq];
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} else {
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/* not mapped yet */
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sc->sc_intr_map[irq] = intr; /* Register it */
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}
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mode = INTR_MODE(intr);
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port = INTR_PORT(intr);
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VPRINTF(("ISA IRQ %d -> %s port %d, %s\n",
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irq, sc->sc_hc->hc_name, port, intr_mode_names[mode]));
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/* Call Vr routine */
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return hpcio_intr_establish(sc->sc_hc, port, intr_modes[mode],
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ih_fun, ih_arg);
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}
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void
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isa_intr_disestablish(ic, arg)
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isa_chipset_tag_t ic;
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void *arg;
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{
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struct vrisab_softc *sc = ic->ic_sc;
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/* Call Vr routine */
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hpcio_intr_disestablish(sc->sc_hc, arg);
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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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/* XXX not coded yet. this is temporary XXX */
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DPRINTF(("isa_intr_alloc:"));
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DBITDISP32(mask);
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*irq = (ffs(mask) -1); /* XXX */
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return 0;
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}
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#ifdef DEBUG_FIND_PCIC
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#warning DEBUG_FIND_PCIC
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static void
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__find_pcic(void)
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{
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int i, j, step, found;
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u_int32_t addr;
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u_int8_t reg;
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int __read_revid (u_int32_t port)
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{
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addr = MIPS_PHYS_TO_KSEG1(i + port);
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printf("%#x\r", i);
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for (found = 0, j = 0; j < 0x100; j += 0x40) {
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*((volatile u_int8_t*)addr) = j;
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reg = *((volatile u_int8_t*)(addr + 1));
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#ifdef DEBUG_FIND_PCIC_I82365SL_ONLY
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if (reg == 0x82 || reg == 0x83) {
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#else
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if ((reg & 0xc0) == 0x80) {
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#endif
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found++;
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}
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}
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if (found)
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printf("\nfound %d socket at %#x (base from %#x)\n", found, addr,
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i + port - VR_ISA_PORT_BASE);
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};
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step = 0x1000000;
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printf("\nFinding PCIC. Trying ISA port %#x-%#x step %#x\n",
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VR_ISA_PORT_BASE, VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE, step);
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for (i = VR_ISA_PORT_BASE; i < VR_ISA_PORT_BASE+VR_ISA_PORT_SIZE; i+= step) {
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__read_revid (0x3e0);
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__read_revid (0x3e2);
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}
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}
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#endif
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#ifdef DEBUG_FIND_COMPORT
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#warning DEBUG_FIND_COMPORT
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static int probe_com __P((u_int32_t));
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static int probe_com( port_addr )
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u_int32_t port_addr;
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{
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u_int32_t addr;
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u_int8_t ubtmp1;
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u_int8_t ubtmp2;
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addr = MIPS_PHYS_TO_KSEG1( port_addr );
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*((volatile u_int8_t*)(addr + com_cfcr)) = LCR_8BITS;
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*((volatile u_int8_t*)(addr + com_iir)) = 0;
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ubtmp1 = *((volatile u_int8_t*)(addr + com_cfcr));
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ubtmp2 = *((volatile u_int8_t*)(addr + com_iir));
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if( (ubtmp1 != LCR_8BITS) || ((ubtmp2 & 0x38) != 0) ){
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return( 0 );
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}
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return( 1 );
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}
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static void
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__find_comport(void)
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{
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int found;
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u_int32_t port;
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u_int32_t step;
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found = 0;
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step = 0x08;
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printf("Searching COM port. Trying ISA port %#x-%#x step %#x\n",
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VR_ISA_PORT_BASE, VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE - 1, step );
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for( port = VR_ISA_PORT_BASE ; port < (VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE) ; port += step ){
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if( probe_com( port ) ){
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found++;
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printf("found %d at %#x\n",found,port);
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}
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}
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}
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#endif
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