270 lines
9.1 KiB
C
270 lines
9.1 KiB
C
/* $NetBSD: fdc_jazzio.c,v 1.11 2005/12/11 12:16:39 christos Exp $ */
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/* $OpenBSD: fd.c,v 1.6 1998/10/03 21:18:57 millert Exp $ */
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/* NetBSD: fd.c,v 1.78 1995/07/04 07:23:09 mycroft Exp */
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/*-
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* Copyright (c) 1998 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 Charles M. Hannum.
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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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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Don Ahn.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)fd.c 7.4 (Berkeley) 5/25/91
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: fdc_jazzio.c,v 1.11 2005/12/11 12:16:39 christos Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/callout.h>
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#include <sys/device.h>
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#include <machine/autoconf.h>
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#include <machine/bus.h>
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#include <arc/jazz/jazzdmatlbreg.h>
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#include <arc/jazz/fdreg.h>
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#include <arc/jazz/fdcvar.h>
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#include <arc/jazz/jazziovar.h>
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#include <arc/jazz/dma.h>
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/* controller driver configuration */
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int fdc_jazzio_probe(struct device *, struct cfdata *, void *);
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void fdc_jazzio_attach(struct device *, struct device *, void *);
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/* MD DMA hook functions */
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void fdc_jazzio_dma_start(struct fdc_softc *, caddr_t, size_t, int);
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void fdc_jazzio_dma_abort(struct fdc_softc *);
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void fdc_jazzio_dma_done(struct fdc_softc *);
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/* software state, per controller */
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struct fdc_jazzio_softc {
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struct fdc_softc sc_fdc; /* base fdc device */
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bus_space_handle_t sc_baseioh; /* base I/O handle */
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bus_space_handle_t sc_dmaioh; /* DMA I/O handle */
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bus_dma_tag_t sc_dmat; /* bus_dma tag */
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bus_dmamap_t sc_dmamap; /* bus_dma map */
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int sc_datain; /* data direction */
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};
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CFATTACH_DECL(fdc_jazzio, sizeof(struct fdc_jazzio_softc),
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fdc_jazzio_probe, fdc_jazzio_attach, NULL, NULL);
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#define FDC_NPORT 6
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#define FDC_OFFSET 2 /* Should we use bus_space_subregion() or not? */
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int
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fdc_jazzio_probe(struct device *parent, struct cfdata *match, void *aux)
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{
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struct jazzio_attach_args *ja = aux;
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bus_space_tag_t iot;
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bus_space_handle_t base_ioh, ioh;
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int rv;
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if (strcmp(ja->ja_name, "I82077") != 0)
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return 0;
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iot = ja->ja_bust;
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rv = 0;
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/* Map the I/O space. */
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if (bus_space_map(iot, ja->ja_addr,
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FDC_OFFSET + FDC_NPORT, 0, &base_ioh))
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return 0;
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if (bus_space_subregion(iot, base_ioh, FDC_OFFSET, FDC_NPORT, &ioh))
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goto out;
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/* reset */
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bus_space_write_1(iot, ioh, FDOUT, 0);
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delay(100);
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bus_space_write_1(iot, ioh, FDOUT, FDO_FRST);
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/* see if it can handle a command */
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if (out_fdc(iot, ioh, NE7CMD_SPECIFY) < 0)
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goto out;
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out_fdc(iot, ioh, 0xdf); /* XXX */
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out_fdc(iot, ioh, 2); /* XXX */
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rv = 1;
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out:
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bus_space_unmap(iot, base_ioh, FDC_OFFSET + FDC_NPORT);
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return rv;
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}
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void
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fdc_jazzio_attach(struct device *parent, struct device *self, void *aux)
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{
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struct fdc_jazzio_softc *jsc = (struct fdc_jazzio_softc *)self;
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struct fdc_softc *fdc = &jsc->sc_fdc;
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struct jazzio_attach_args *ja = aux;
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fdc->sc_iot = ja->ja_bust;
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fdc->sc_maxiosize = MAXPHYS;
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fdc->sc_dma_start = fdc_jazzio_dma_start;
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fdc->sc_dma_abort = fdc_jazzio_dma_abort;
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fdc->sc_dma_done = fdc_jazzio_dma_done;
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jsc->sc_dmat = ja->ja_dmat;
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if (bus_space_map(fdc->sc_iot, ja->ja_addr,
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FDC_OFFSET + FDC_NPORT, 0, &jsc->sc_baseioh)) {
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printf(": unable to map I/O space\n");
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return;
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}
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if (bus_space_subregion(fdc->sc_iot, jsc->sc_baseioh,
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FDC_OFFSET, FDC_NPORT, &fdc->sc_ioh)) {
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printf(": unable to subregion I/O space\n");
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goto out_unmap1;
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}
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if (bus_space_map(fdc->sc_iot, jazzio_conf->jc_fdcdmareg,
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R4030_DMA_RANGE, 0, &jsc->sc_dmaioh)) {
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printf(": unable to map DMA I/O space\n");
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goto out_unmap1;
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}
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if (bus_dmamap_create(jsc->sc_dmat, MAXPHYS, 1, MAXPHYS, 0,
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BUS_DMA_ALLOCNOW|BUS_DMA_NOWAIT, &jsc->sc_dmamap)) {
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printf(": unable to create DMA map\n");
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goto out_unmap2;
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}
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printf("\n");
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jazzio_intr_establish(ja->ja_intr, fdcintr, fdc);
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fdcattach(fdc);
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return;
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out_unmap2:
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bus_space_unmap(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_RANGE);
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out_unmap1:
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bus_space_unmap(fdc->sc_iot, jsc->sc_baseioh, FDC_OFFSET + FDC_NPORT);
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}
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void
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fdc_jazzio_dma_start(struct fdc_softc *fdc, caddr_t addr, size_t size,
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int datain)
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{
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struct fdc_jazzio_softc *jsc = (void *)fdc;
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/* halt DMA */
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bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_ENAB, 0);
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bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_MODE, 0);
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jsc->sc_datain = datain;
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bus_dmamap_load(jsc->sc_dmat, jsc->sc_dmamap, addr, size, NULL,
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BUS_DMA_NOWAIT | BUS_DMA_STREAMING |
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(datain ? BUS_DMA_READ : BUS_DMA_WRITE));
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bus_dmamap_sync(jsc->sc_dmat, jsc->sc_dmamap,
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0, jsc->sc_dmamap->dm_mapsize,
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datain ? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
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/* load new transfer parameters */
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bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh,
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R4030_DMA_ADDR, jsc->sc_dmamap->dm_segs[0].ds_addr);
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bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh,
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R4030_DMA_COUNT, jsc->sc_dmamap->dm_segs[0].ds_len);
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bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh,
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R4030_DMA_MODE, R4030_DMA_MODE_160NS | R4030_DMA_MODE_8);
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/* start DMA */
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bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh,
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R4030_DMA_ENAB, R4030_DMA_ENAB_RUN |
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(datain ? R4030_DMA_ENAB_READ : R4030_DMA_ENAB_WRITE));
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}
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void
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fdc_jazzio_dma_abort(struct fdc_softc *fdc)
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{
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struct fdc_jazzio_softc *jsc = (void *)fdc;
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/* halt DMA */
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bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_ENAB, 0);
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bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_MODE, 0);
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}
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void
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fdc_jazzio_dma_done(struct fdc_softc *fdc)
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{
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struct fdc_jazzio_softc *jsc = (void *)fdc;
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/* halt DMA */
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bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_COUNT, 0);
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bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_ENAB, 0);
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bus_space_write_4(fdc->sc_iot, jsc->sc_dmaioh, R4030_DMA_MODE, 0);
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bus_dmamap_sync(jsc->sc_dmat, jsc->sc_dmamap,
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0, jsc->sc_dmamap->dm_mapsize,
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jsc->sc_datain ? BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
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bus_dmamap_unload(jsc->sc_dmat, jsc->sc_dmamap);
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}
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