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.
100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
/* $NetBSD: wdc_upc.c,v 1.9 2003/10/08 10:58:12 bouyer Exp $ */
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/*-
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* Copyright (c) 2000 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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/* This file is part of NetBSD/arm26 -- a port of NetBSD to ARM2/3 machines. */
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: wdc_upc.c,v 1.9 2003/10/08 10:58:12 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 <machine/intr.h>
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#include <dev/ata/atavar.h> /* XXX needed by wdcvar.h */
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#include <dev/ic/upcvar.h>
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#include <dev/ic/wdcvar.h>
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static int wdc_upc_match(struct device *, struct cfdata *, void *);
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static void wdc_upc_attach(struct device *, struct device *, void *);
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struct wdc_upc_softc {
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struct wdc_softc sc_wdc;
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struct channel_softc *sc_chanptr;
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struct channel_softc sc_channel;
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};
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CFATTACH_DECL(wdc_upc, sizeof(struct wdc_upc_softc),
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wdc_upc_match, wdc_upc_attach, NULL, NULL);
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static int
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wdc_upc_match(struct device *parent, struct cfdata *cf, void *aux)
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{
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/* upc_submatch does it all anyway */
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return 1;
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}
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static void
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wdc_upc_attach(struct device *parent, struct device *self, void *aux)
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{
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struct wdc_upc_softc *sc = (struct wdc_upc_softc *)self;
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struct upc_attach_args *ua = aux;
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sc->sc_wdc.cap = WDC_CAPABILITY_DATA16;
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sc->sc_wdc.PIO_cap = 1; /* XXX ??? */
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sc->sc_wdc.DMA_cap = 0;
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sc->sc_wdc.UDMA_cap = 0;
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sc->sc_wdc.nchannels = 1;
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sc->sc_chanptr = &sc->sc_channel;
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sc->sc_wdc.channels = &sc->sc_chanptr;
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sc->sc_channel.cmd_iot = ua->ua_iot;
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sc->sc_channel.cmd_ioh = ua->ua_ioh;
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sc->sc_channel.ctl_iot = ua->ua_iot;
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sc->sc_channel.ctl_ioh = ua->ua_ioh2;
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sc->sc_channel.channel = 0;
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sc->sc_channel.wdc = &sc->sc_wdc;
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sc->sc_channel.ch_queue = malloc(sizeof(struct channel_queue),
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M_DEVBUF, M_NOWAIT);
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if (sc->sc_channel.ch_queue == NULL) {
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printf("%s: can't allocate memory for command queue\n",
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sc->sc_wdc.sc_dev.dv_xname);
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return;
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}
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upc_intr_establish(ua->ua_irqhandle, IPL_BIO, wdcintr,
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&sc->sc_channel);
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printf("\n");
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wdcattach(&sc->sc_channel);
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}
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