NetBSD/sys/arch/macppc/dev/wdc_obio.c

258 lines
7.1 KiB
C

/* $NetBSD: wdc_obio.c,v 1.4 1999/06/14 08:53:06 tsubai Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum and by Onno van der Linden.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <vm/vm.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <dev/ata/atavar.h>
#include <dev/ic/wdcvar.h>
#include <macppc/dev/dbdma.h>
#define WDC_REG_NPORTS 8
#define WDC_AUXREG_OFFSET 0x16
#define WDC_DEFAULT_PIO_IRQ 13 /* XXX */
#define WDC_DEFAULT_DMA_IRQ 2 /* XXX */
#define WDC_OPTIONS_DMA 0x01
/*
* XXX This code currently doesn't even try to allow 32-bit data port use.
*/
struct wdc_obio_softc {
struct wdc_softc sc_wdcdev;
struct channel_softc *wdc_chanptr;
struct channel_softc wdc_channel;
dbdma_regmap_t *sc_dmareg;
dbdma_command_t *sc_dmacmd;
};
int wdc_obio_probe __P((struct device *, struct cfdata *, void *));
void wdc_obio_attach __P((struct device *, struct device *, void *));
struct cfattach wdc_obio_ca = {
sizeof(struct wdc_obio_softc), wdc_obio_probe, wdc_obio_attach
};
static int wdc_obio_dma_init __P((void *, int, int, void *, size_t, int));
static void wdc_obio_dma_start __P((void *, int, int, int));
static int wdc_obio_dma_finish __P((void *, int, int, int));
int
wdc_obio_probe(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct confargs *ca = aux;
char compat[32];
/* XXX should not use name */
if (strcmp(ca->ca_name, "ATA") == 0 ||
strcmp(ca->ca_name, "ata") == 0 ||
strcmp(ca->ca_name, "ata0") == 0 ||
strcmp(ca->ca_name, "ide") == 0)
return 1;
bzero(compat, sizeof(compat));
OF_getprop(ca->ca_node, "compatible", compat, sizeof(compat));
if (strcmp(compat, "heathrow-ata") == 0)
return 1;
return 0;
}
void
wdc_obio_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct wdc_obio_softc *sc = (void *)self;
struct confargs *ca = aux;
struct channel_softc *chp = &sc->wdc_channel;
int intr;
int use_dma = 0;
if (sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags & WDC_OPTIONS_DMA) {
if (ca->ca_nreg >= 16 || ca->ca_nintr == -1)
use_dma = 1; /* XXX Don't work yet. */
}
if (ca->ca_nintr >= 4 && ca->ca_nreg >= 8) {
intr = ca->ca_intr[0];
printf(" irq %d", intr);
} else if (ca->ca_nintr == -1) {
intr = WDC_DEFAULT_PIO_IRQ;
printf(" irq property not found; using %d", intr);
} else {
printf(": couldn't get irq property\n");
return;
}
if (use_dma)
printf(": DMA transfer");
printf("\n");
chp->cmd_iot = chp->ctl_iot =
macppc_make_bus_space_tag(ca->ca_baseaddr + ca->ca_reg[0], 4);
if (bus_space_map(chp->cmd_iot, 0, WDC_REG_NPORTS, 0, &chp->cmd_ioh) ||
bus_space_subregion(chp->cmd_iot, chp->cmd_ioh,
WDC_AUXREG_OFFSET, 1, &chp->ctl_ioh)) {
printf("%s: couldn't map registers\n",
sc->sc_wdcdev.sc_dev.dv_xname);
return;
}
#if 0
chp->data32iot = chp->cmd_iot;
chp->data32ioh = chp->cmd_ioh;
#endif
intr_establish(intr, IST_LEVEL, IPL_BIO, wdcintr, chp);
if (use_dma) {
sc->sc_dmacmd = dbdma_alloc(sizeof(dbdma_command_t) * 20);
sc->sc_dmareg = mapiodev(ca->ca_baseaddr + ca->ca_reg[2],
ca->ca_reg[3]);
sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA;
}
sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16;
sc->sc_wdcdev.PIO_cap = 0;
sc->wdc_chanptr = chp;
sc->sc_wdcdev.channels = &sc->wdc_chanptr;
sc->sc_wdcdev.nchannels = 1;
sc->sc_wdcdev.dma_arg = sc;
sc->sc_wdcdev.dma_init = wdc_obio_dma_init;
sc->sc_wdcdev.dma_start = wdc_obio_dma_start;
sc->sc_wdcdev.dma_finish = wdc_obio_dma_finish;
chp->channel = 0;
chp->wdc = &sc->sc_wdcdev;
chp->ch_queue = malloc(sizeof(struct channel_queue),
M_DEVBUF, M_NOWAIT);
if (chp->ch_queue == NULL) {
printf("%s: can't allocate memory for command queue",
sc->sc_wdcdev.sc_dev.dv_xname);
return;
}
wdcattach(chp);
}
static int
wdc_obio_dma_init(v, channel, drive, databuf, datalen, read)
void *v;
void *databuf;
size_t datalen;
int read;
{
struct wdc_obio_softc *sc = v;
vaddr_t va = (vaddr_t)databuf;
dbdma_command_t *cmdp;
u_int cmd, offset;
cmdp = sc->sc_dmacmd;
cmd = read ? DBDMA_CMD_IN_MORE : DBDMA_CMD_OUT_MORE;
offset = va & PGOFSET;
/* if va is not page-aligned, setup the first page */
if (offset != 0) {
int rest = NBPG - offset; /* the rest of the page */
if (datalen > rest) { /* if continues to next page */
DBDMA_BUILD(cmdp, cmd, 0, rest, vtophys(va),
DBDMA_INT_NEVER, DBDMA_WAIT_NEVER,
DBDMA_BRANCH_NEVER);
datalen -= rest;
va += rest;
cmdp++;
}
}
/* now va is page-aligned */
while (datalen > NBPG) {
DBDMA_BUILD(cmdp, cmd, 0, NBPG, vtophys(va),
DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER);
datalen -= NBPG;
va += NBPG;
cmdp++;
}
/* the last page (datalen <= NBPG here) */
cmd = read ? DBDMA_CMD_IN_LAST : DBDMA_CMD_OUT_LAST;
DBDMA_BUILD(cmdp, cmd, 0, datalen, vtophys(va),
DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER);
cmdp++;
DBDMA_BUILD(cmdp, DBDMA_CMD_STOP, 0, 0, 0,
DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER);
return 0;
}
static void
wdc_obio_dma_start(v, channel, drive, read)
void *v;
int channel, drive;
{
struct wdc_obio_softc *sc = v;
dbdma_start(sc->sc_dmareg, sc->sc_dmacmd);
}
static int
wdc_obio_dma_finish(v, channel, drive, read)
void *v;
int channel, drive;
int read;
{
struct wdc_obio_softc *sc = v;
dbdma_stop(sc->sc_dmareg);
return 0;
}