228 lines
6.8 KiB
C
228 lines
6.8 KiB
C
/* $NetBSD: wdc_isa.c,v 1.19 2000/04/02 02:07:52 itojun 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 and by Onno van der Linden.
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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/types.h>
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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 <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/isa/isavar.h>
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#include <dev/isa/isadmavar.h>
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#include <dev/ata/atavar.h>
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#include <dev/ic/wdcvar.h>
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#define WDC_ISA_REG_NPORTS 8
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#define WDC_ISA_AUXREG_OFFSET 0x206
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#define WDC_ISA_AUXREG_NPORTS 1 /* XXX "fdc" owns ports 0x3f7/0x377 */
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/* options passed via the 'flags' config keyword */
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#define WDC_OPTIONS_32 0x01 /* try to use 32bit data I/O */
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struct wdc_isa_softc {
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struct wdc_softc sc_wdcdev;
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struct channel_softc *wdc_chanptr;
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struct channel_softc wdc_channel;
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isa_chipset_tag_t sc_ic;
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void *sc_ih;
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int sc_drq;
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};
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int wdc_isa_probe __P((struct device *, struct cfdata *, void *));
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void wdc_isa_attach __P((struct device *, struct device *, void *));
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struct cfattach wdc_isa_ca = {
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sizeof(struct wdc_isa_softc), wdc_isa_probe, wdc_isa_attach
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};
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static void wdc_isa_dma_setup __P((struct wdc_isa_softc *));
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static int wdc_isa_dma_init __P((void*, int, int, void *, size_t, int));
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static void wdc_isa_dma_start __P((void*, int, int));
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static int wdc_isa_dma_finish __P((void*, int, int, int));
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int
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wdc_isa_probe(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 channel_softc ch;
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struct isa_attach_args *ia = aux;
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int result = 0;
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memset(&ch, 0, sizeof(ch));
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ch.cmd_iot = ia->ia_iot;
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if (bus_space_map(ch.cmd_iot, ia->ia_iobase, WDC_ISA_REG_NPORTS, 0,
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&ch.cmd_ioh))
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goto out;
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ch.ctl_iot = ia->ia_iot;
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if (bus_space_map(ch.ctl_iot, ia->ia_iobase + WDC_ISA_AUXREG_OFFSET,
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WDC_ISA_AUXREG_NPORTS, 0, &ch.ctl_ioh))
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goto outunmap;
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result = wdcprobe(&ch);
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if (result) {
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ia->ia_iosize = WDC_ISA_REG_NPORTS;
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ia->ia_msize = 0;
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}
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bus_space_unmap(ch.ctl_iot, ch.ctl_ioh, WDC_ISA_AUXREG_NPORTS);
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outunmap:
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bus_space_unmap(ch.cmd_iot, ch.cmd_ioh, WDC_ISA_REG_NPORTS);
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out:
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return (result);
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}
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void
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wdc_isa_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct wdc_isa_softc *sc = (void *)self;
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struct isa_attach_args *ia = aux;
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printf("\n");
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sc->wdc_channel.cmd_iot = ia->ia_iot;
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sc->wdc_channel.ctl_iot = ia->ia_iot;
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sc->sc_ic = ia->ia_ic;
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if (bus_space_map(sc->wdc_channel.cmd_iot, ia->ia_iobase,
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WDC_ISA_REG_NPORTS, 0, &sc->wdc_channel.cmd_ioh) ||
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bus_space_map(sc->wdc_channel.ctl_iot,
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ia->ia_iobase + WDC_ISA_AUXREG_OFFSET, WDC_ISA_AUXREG_NPORTS,
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0, &sc->wdc_channel.ctl_ioh)) {
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printf("%s: couldn't map registers\n",
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sc->sc_wdcdev.sc_dev.dv_xname);
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}
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sc->wdc_channel.data32iot = sc->wdc_channel.cmd_iot;
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sc->wdc_channel.data32ioh = sc->wdc_channel.cmd_ioh;
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sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
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IPL_BIO, wdcintr, &sc->wdc_channel);
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if (ia->ia_drq != DRQUNK) {
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sc->sc_drq = ia->ia_drq;
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sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA;
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sc->sc_wdcdev.dma_arg = sc;
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sc->sc_wdcdev.dma_init = wdc_isa_dma_init;
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sc->sc_wdcdev.dma_start = wdc_isa_dma_start;
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sc->sc_wdcdev.dma_finish = wdc_isa_dma_finish;
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wdc_isa_dma_setup(sc);
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}
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sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_PREATA;
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if (sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags & WDC_OPTIONS_32)
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sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA32;
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sc->sc_wdcdev.PIO_cap = 0;
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sc->wdc_chanptr = &sc->wdc_channel;
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sc->sc_wdcdev.channels = &sc->wdc_chanptr;
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sc->sc_wdcdev.nchannels = 1;
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sc->wdc_channel.channel = 0;
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sc->wdc_channel.wdc = &sc->sc_wdcdev;
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sc->wdc_channel.ch_queue = malloc(sizeof(struct channel_queue),
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M_DEVBUF, M_NOWAIT);
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if (sc->wdc_channel.ch_queue == NULL) {
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printf("%s: can't allocate memory for command queue",
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sc->sc_wdcdev.sc_dev.dv_xname);
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return;
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}
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wdcattach(&sc->wdc_channel);
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}
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static void
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wdc_isa_dma_setup(sc)
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struct wdc_isa_softc *sc;
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{
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bus_size_t maxsize;
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if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->sc_drq)) < MAXPHYS) {
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printf("%s: max DMA size %lu is less than required %d\n",
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sc->sc_wdcdev.sc_dev.dv_xname, (u_long)maxsize, MAXPHYS);
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sc->sc_wdcdev.cap &= ~WDC_CAPABILITY_DMA;
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return;
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}
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if (isa_dmamap_create(sc->sc_ic, sc->sc_drq,
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MAXPHYS, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) {
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printf("%s: can't create map for drq %d\n",
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sc->sc_wdcdev.sc_dev.dv_xname, sc->sc_drq);
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sc->sc_wdcdev.cap &= ~WDC_CAPABILITY_DMA;
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}
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}
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static int
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wdc_isa_dma_init(v, channel, drive, databuf, datalen, read)
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void *v;
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void *databuf;
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size_t datalen;
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int read;
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{
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struct wdc_isa_softc *sc = v;
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isa_dmastart(sc->sc_ic, sc->sc_drq, databuf, datalen, NULL,
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(read ? DMAMODE_READ : DMAMODE_WRITE) | DMAMODE_DEMAND,
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BUS_DMA_NOWAIT);
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return 0;
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}
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static void
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wdc_isa_dma_start(v, channel, drive)
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void *v;
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int channel, drive;
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{
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/* nothing to do */
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}
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static int
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wdc_isa_dma_finish(v, channel, drive, read)
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void *v;
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int channel, drive;
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int read;
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{
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struct wdc_isa_softc *sc = v;
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isa_dmadone(sc->sc_ic, sc->sc_drq);
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return 0;
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}
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