99d6009c2a
http://mail-index.netbsd.org/tech-kern/2003/09/25/0006.html This adds a device (atabus) between IDE controllers and wd or atapibus, to have each ATA channel show up in the device tree. Later there will be atabus devices in /dev, so that we can do IOCTL on them. Each atabus has its own kernel thread, to handle operations that needs polling, e.g. reset and others. Device probing on each bus it defered to the atabus thread creation. This allows to do the reset and basic device probes in parallel, which reduce boot time on systems with several pciide controllers.
113 lines
3.9 KiB
C
113 lines
3.9 KiB
C
/* $NetBSD: dtide.c,v 1.11 2003/10/08 10:58:13 bouyer Exp $ */
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/*-
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* Copyright (c) 2000, 2001 Ben Harris
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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. The name of the author 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* dtide.c - Driver for the D.T. Software IDE interface.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: dtide.c,v 1.11 2003/10/08 10:58:13 bouyer Exp $");
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <machine/bus.h>
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#include <dev/podulebus/podulebus.h>
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#include <dev/podulebus/podules.h>
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#include <dev/podulebus/dtidereg.h>
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#include <dev/ata/atavar.h>
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#include <dev/ic/wdcvar.h>
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struct dtide_softc {
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struct wdc_softc sc_wdc;
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struct channel_softc *sc_chp[DTIDE_NCHANNELS];/* pointers to sc_chan */
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struct channel_softc sc_chan[DTIDE_NCHANNELS];
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struct channel_queue sc_chq[DTIDE_NCHANNELS];
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bus_space_tag_t sc_magict;
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bus_space_handle_t sc_magich;
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};
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static int dtide_match(struct device *, struct cfdata *, void *);
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static void dtide_attach(struct device *, struct device *, void *);
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CFATTACH_DECL(dtide, sizeof(struct dtide_softc),
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dtide_match, dtide_attach, NULL, NULL);
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static const int dtide_cmdoffsets[] = { DTIDE_CMDBASE0, DTIDE_CMDBASE1 };
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static const int dtide_ctloffsets[] = { DTIDE_CTLBASE0, DTIDE_CTLBASE1 };
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static int
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dtide_match(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct podulebus_attach_args *pa = aux;
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return pa->pa_product == PODULE_DTSOFT_IDE;
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}
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static void
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dtide_attach(struct device *parent, struct device *self, void *aux)
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{
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struct podulebus_attach_args *pa = aux;
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struct dtide_softc *sc = (void *)self;
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int i;
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bus_space_tag_t bst;
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sc->sc_wdc.cap = WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_NOIRQ;
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sc->sc_wdc.PIO_cap = 0; /* XXX correct? */
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sc->sc_wdc.DMA_cap = 0; /* XXX correct? */
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sc->sc_wdc.UDMA_cap = 0;
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sc->sc_wdc.nchannels = DTIDE_NCHANNELS;
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sc->sc_wdc.channels = sc->sc_chp;
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sc->sc_magict = pa->pa_fast_t;
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bus_space_map(pa->pa_fast_t, pa->pa_fast_base + DTIDE_MAGICBASE, 0, 1,
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&sc->sc_magich);
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podulebus_shift_tag(pa->pa_fast_t, DTIDE_REGSHIFT, &bst);
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printf("\n");
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for (i = 0; i < DTIDE_NCHANNELS; i++) {
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sc->sc_chp[i] = &sc->sc_chan[i];
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sc->sc_chan[i].channel = i;
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sc->sc_chan[i].wdc = &sc->sc_wdc;
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sc->sc_chan[i].cmd_iot = bst;
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sc->sc_chan[i].ctl_iot = bst;
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sc->sc_chan[i].ch_queue = &sc->sc_chq[i];
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bus_space_map(pa->pa_fast_t,
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pa->pa_fast_base + dtide_cmdoffsets[i], 0, 8,
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&sc->sc_chan[i].cmd_ioh);
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bus_space_map(pa->pa_fast_t,
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pa->pa_fast_base + dtide_ctloffsets[i], 0, 8,
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&sc->sc_chan[i].ctl_ioh);
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wdcattach(&sc->sc_chan[i]);
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}
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}
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