304 lines
7.6 KiB
C
304 lines
7.6 KiB
C
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/* $NetBSD: iomd.c,v 1.1 1997/10/14 10:58:48 mark Exp $ */
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/*
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* Copyright (c) 1996-1997 Mark Brinicombe.
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* Copyright (c) 1997 Causality Limited
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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 Mark Brinicombe.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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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* RiscBSD kernel project
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*
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* iomd.c
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*
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* Probing and configuration for the IOMD
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*
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* Created : 10/10/95
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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 <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/irqhandler.h>
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#include <arm32/iomd/iomdreg.h>
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#include <arm32/iomd/iomdvar.h>
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#include "iomd.h"
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#if NIOMD != 1
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#error Need one IOMD device configured
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#endif
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/*
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* IOMD device.
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*
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* This probes and attaches the top level IOMD device.
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* It then configures any children of the IOMD device.
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*/
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/*
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* IOMD softc structure.
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*
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* Contains the device node, bus space tag, handle and address
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* and the IOMD id.
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*/
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struct iomd_softc {
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struct device sc_dev; /* device node */
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bus_space_tag_t sc_iot; /* bus tag */
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bus_space_handle_t sc_ioh; /* bus handle */
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int sc_id; /* IOMD id */
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};
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static int iomdmatch __P((struct device *parent, struct cfdata *cf,
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void *aux));
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static void iomdattach __P((struct device *parent, struct device *self,
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void *aux));
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static int iomdprint __P((void *aux, const char *iomdbus));
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struct cfattach iomd_ca = {
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sizeof(struct iomd_softc), iomdmatch, iomdattach
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};
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struct cfdriver iomd_cd = {
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NULL, "iomd", DV_DULL, 0
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};
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extern struct bus_space iomd_bs_tag;
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/* Declare prototypes */
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/*
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* int iomdprint(void *aux, const char *name)
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*
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* print configuration info for children
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*/
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static int
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iomdprint(aux, name)
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void *aux;
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const char *name;
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{
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union iomd_attach_args *ia = aux;
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return(QUIET);
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}
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/*
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* int iomdmatch(struct device *parent, struct cfdata *cf, void *aux)
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*
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* Just return ok for this if it is device 0
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*/
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static int
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iomdmatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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if (cf->cf_unit == 0)
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return(1);
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return(0);
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}
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/*
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* void iomdattach(struct device *parent, struct device *dev, void *aux)
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*
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* Map the IOMD and identify it.
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* Then configure the child devices based on the IOMD ID.
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*/
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static void
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iomdattach(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 iomd_softc *sc = (struct iomd_softc *)self;
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struct mainbus_attach_args *mb = aux;
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int refresh;
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#if 0
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int dma_time;
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int combo_time;
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int loop;
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#endif
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union iomd_attach_args ia;
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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iot = sc->sc_iot = &iomd_bs_tag;
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/* Map the IOMD */
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if (bus_space_map(iot, IOMD_BASE, IOMD_SIZE, 0, &ioh))
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panic("%s: Cannot map registers\n", self->dv_xname);
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sc->sc_ioh = ioh;
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/* Get the ID */
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sc->sc_id = bus_space_read_1(iot, ioh, IOMD_ID0)
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printf(": ");
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/* Identify it and get the DRAM refresh rate */
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switch (sc->sc_id) {
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case ARM7500_IOC_ID:
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printf("ARM7500 IOMD ");
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refresh = bus_space_read_1(iot, ioh, IOMD_REFCR) & 0x0f;
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break;
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case ARM7500FE_IOC_ID:
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printf("ARM7500FE IOMD ");
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refresh = bus_space_read_1(iot, ioh, IOMD_REFCR) & 0x0f;
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break;
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case RPC600_IOMD_ID:
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printf("RPC IOMD ");
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refresh = bus_space_read_1(iot, ioh, IOMD_VREFCR) & 0x09;
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break;
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default:
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printf("Unknown IOMD ID=%04x ", sc->sc_id);
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refresh = -1;
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break;
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}
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printf("\n");
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/* Report the DRAM refresh rate */
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printf("%s: ", self->dv_xname);
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printf("DRAM refresh=");
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switch (refresh) {
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case 0x0:
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printf("off");
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break;
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case 0x1:
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printf("16us");
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break;
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case 0x2:
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printf("32us");
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break;
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case 0x4:
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printf("64us");
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break;
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case 0x8:
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printf("128us");
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break;
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default:
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printf("unknown [%02x]", refresh);
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break;
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}
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#if 0
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/*
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* No point in reporting this as it may get changed when devices are
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* attached
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*/
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dma_time = ReadByte(IOMD_DMATCR);
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printf(", dma cycle types=");
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for (loop = 0; loop < 4; ++loop,dma_time = dma_time >> 2)
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printf("%c", 'A' + (dma_time & 3));
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combo_time = ReadByte(IOMD_IOTCR);
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printf(", combo cycle type=%c", 'A' + ((combo_time >> 2) & 3));
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#endif
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printf("\n");
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/* Set up the external DMA channels */
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/* XXX - this should be machine dependant not IOMD dependant */
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switch (sc->sc_id) {
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case ARM7500_IOC_ID:
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case ARM7500FE_IOC_ID:
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break;
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case RPC600_IOMD_ID:
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/* DMA channels 2 & 3 are external */
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bus_space_write_1(iot, ioh, IOMD_DMAEXT, 0x0c);
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break;
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}
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/* Configure the child devices */
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/* Attach clock device */
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ia.ia_clk.ca_name = "clk";
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ia.ia_clk.ca_iot = iot;
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ia.ia_clk.ca_ioh = ioh;
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config_found(self, &ia, iomdprint);
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/* Attach kbd device */
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if (bus_space_subregion(iot, ioh, IOMD_KBDDAT, 8, &ia.ia_kbd.ka_ioh))
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panic("%s: Cannot map kbd registers\n", self->dv_xname);
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ia.ia_kbd.ka_name = "kbd";
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ia.ia_kbd.ka_iot = iot;
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ia.ia_kbd.ka_rxirq = IRQ_KBDRX;
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ia.ia_kbd.ka_txirq = IRQ_KBDTX;
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config_found(self, &ia, iomdprint);
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/* Attach iic device */
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if (bus_space_subregion(iot, ioh, IOMD_IOCR, 4, &ia.ia_iic.ia_ioh))
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panic("%s: Cannot map iic registers\n", self->dv_xname);
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ia.ia_iic.ia_name = "iic";
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ia.ia_iic.ia_iot = iot;
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ia.ia_iic.ia_irq = -1;
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config_found(self, &ia, iomdprint);
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switch (sc->sc_id) {
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case ARM7500_IOC_ID:
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case ARM7500FE_IOC_ID:
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/* Attach pms device */
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if (bus_space_subregion(iot, ioh, IOMD_MSDATA, 8, &ia.ia_pms.pa_ioh))
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panic("%s: Cannot map pms registers\n", self->dv_xname);
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ia.ia_pms.pa_name = "pms";
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ia.ia_pms.pa_iot = iot;
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ia.ia_pms.pa_irq = -1;
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config_found(self, &ia, iomdprint);
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break;
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case RPC600_IOMD_ID:
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/* Attach qms device */
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if (bus_space_subregion(iot, ioh, IOMD_MOUSEX, 8, &ia.ia_qms.qa_ioh))
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panic("%s: Cannot map qms registers\n", self->dv_xname);
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if (bus_space_map(iot, IO_MOUSE_BUTTONS, 4, 0, &ia.ia_qms.qa_ioh_but))
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panic("%s: Cannot map registers\n", self->dv_xname);
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ia.ia_qms.qa_name = "qms";
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ia.ia_qms.qa_iot = iot;
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ia.ia_qms.qa_irq = IRQ_VSYNC;
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config_found(self, &ia, iomdprint);
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break;
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}
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}
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/* End of iomd.c */
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