NetBSD/sys/dev/isa/wdc_isa.c

191 lines
5.3 KiB
C

/* $NetBSD: wdc_isa.c,v 1.8 1998/06/09 07:25:06 thorpej Exp $ */
/*
* Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved.
*
* DMA and multi-sector PIO handling are derived from code contributed by
* Onno van der Linden.
*
* ISA attachment created by Christopher G. Demetriou.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles M. Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>
#include <dev/ic/wdcvar.h>
#define WDC_ISA_REG_NPORTS 8
#define WDC_ISA_AUXREG_OFFSET 0x206
#define WDC_ISA_AUXREG_NPORTS 1 /* XXX "fdc" owns ports 0x3f7/0x377 */
/*
* XXX This code currently doesn't even try to allow 32-bit data port use.
*/
struct wdc_isa_softc {
struct wdc_softc sc_wdcdev;
struct wdc_attachment_data sc_ad;
isa_chipset_tag_t sc_ic;
void *sc_ih;
int sc_drq;
};
int wdc_isa_probe __P((struct device *, struct cfdata *, void *));
void wdc_isa_attach __P((struct device *, struct device *, void *));
struct cfattach wdc_isa_ca = {
sizeof(struct wdc_isa_softc), wdc_isa_probe, wdc_isa_attach
};
static void wdc_isa_dma_setup __P((void *));
static void wdc_isa_dma_start __P((void *, void *, size_t, int));
static void wdc_isa_dma_finish __P((void *));
int
wdc_isa_probe(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
#if 0 /* XXX memset */
struct wdc_attachment_data ad = { 0 };
#else /* XXX memset */
struct wdc_attachment_data ad;
#endif /* XXX memset */
struct isa_attach_args *ia = aux;
int result = 0;
#if 0 /* XXX memset */
#else /* XXX memset */
bzero(&ad, sizeof ad);
#endif /* XXX memset */
ad.iot = ia->ia_iot;
if (bus_space_map(ad.iot, ia->ia_iobase, WDC_ISA_REG_NPORTS, 0,
&ad.ioh))
goto out;
ad.auxiot = ia->ia_iot;
if (bus_space_map(ad.auxiot, ia->ia_iobase + WDC_ISA_AUXREG_OFFSET,
WDC_ISA_AUXREG_NPORTS, 0, &ad.auxioh))
goto outunmap;
result = wdcprobe(&ad);
if (result) {
ia->ia_iosize = WDC_ISA_REG_NPORTS;
ia->ia_msize = 0;
}
bus_space_unmap(ad.auxiot, ad.auxioh, WDC_ISA_AUXREG_NPORTS);
outunmap:
bus_space_unmap(ad.iot, ad.ioh, WDC_ISA_REG_NPORTS);
out:
return (result);
}
void
wdc_isa_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct wdc_isa_softc *sc = (void *)self;
struct isa_attach_args *ia = aux;
printf("\n");
sc->sc_ad.iot = ia->ia_iot;
sc->sc_ad.auxiot = ia->ia_iot;
sc->sc_ic = ia->ia_ic;
if (bus_space_map(sc->sc_ad.iot, ia->ia_iobase, WDC_ISA_REG_NPORTS, 0,
&sc->sc_ad.ioh) ||
bus_space_map(sc->sc_ad.auxiot,
ia->ia_iobase + WDC_ISA_AUXREG_OFFSET, WDC_ISA_AUXREG_NPORTS,
0, &sc->sc_ad.auxioh)) {
printf("%s: couldn't map registers\n",
sc->sc_wdcdev.sc_dev.dv_xname);
}
sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
IPL_BIO, wdcintr, sc);
if (ia->ia_drq != DRQUNK) {
sc->sc_drq = ia->ia_drq;
sc->sc_ad.cap |= WDC_CAPABILITY_DMA;
sc->sc_ad.dma_arg = sc;
sc->sc_ad.dma_setup = &wdc_isa_dma_setup;
sc->sc_ad.dma_start = &wdc_isa_dma_start;
sc->sc_ad.dma_finish = &wdc_isa_dma_finish;
}
wdcattach(&sc->sc_wdcdev, &sc->sc_ad);
}
static void
wdc_isa_dma_setup(scv)
void *scv;
{
struct wdc_isa_softc *sc = scv;
if (isa_dmamap_create(sc->sc_ic, sc->sc_drq,
MAXPHYS, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) {
printf("%s: can't create map for drq %d\n",
sc->sc_wdcdev.sc_dev.dv_xname, sc->sc_drq);
sc->sc_ad.cap &= ~WDC_CAPABILITY_DMA;
}
}
static void
wdc_isa_dma_start(scv, buf, size, read)
void *scv, *buf;
size_t size;
int read;
{
struct wdc_isa_softc *sc = scv;
isa_dmastart(sc->sc_ic, sc->sc_drq, buf,
size, NULL, read ? DMAMODE_READ : DMAMODE_WRITE,
BUS_DMA_NOWAIT);
}
static void
wdc_isa_dma_finish(scv)
void *scv;
{
struct wdc_isa_softc *sc = scv;
isa_dmadone(sc->sc_ic, sc->sc_drq);
}