NetBSD-5.0.2/sys/arch/acorn32/podulebus/asc.c
/* $NetBSD: asc.c,v 1.15 2008/06/12 23:22:36 cegger Exp $ */
/*
* Copyright (c) 2001 Richard Earnshaw
* All rights reserved.
*
* 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. The name of the company nor the name of the author may 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 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
* POSSIBILITY OF SUCH DAMAGE.
*
* Copyright (c) 1982, 1990 The Regents of the University of California.
* All rights reserved.
*
* 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. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* Copyright (c) 1996 Mark Brinicombe
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* from:ahsc.c
*/
/*
* Driver for the Acorn SCSI card using the SBIC (WD33C93A) generic driver
*
* Thanks to Acorn for supplying programming information on this card.
*/
/* #define ASC_DMAMAP_DEBUG */
/* #define DEBUG */
#include "opt_ddb.h"
#include <sys/param.h>
__KERNEL_RCSID(0, "$NetBSD: asc.c,v 1.15 2008/06/12 23:22:36 cegger Exp $");
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <uvm/uvm_extern.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <machine/bootconfig.h> /* asc_poll */
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <arm/arm32/katelib.h>
#include <dev/podulebus/podules.h>
#include <dev/podulebus/powerromreg.h>
#include <acorn32/podulebus/podulebus.h>
#include <acorn32/podulebus/sbicreg.h>
#include <acorn32/podulebus/sbicvar.h>
#include <acorn32/podulebus/ascreg.h>
#include <acorn32/podulebus/ascvar.h>
void ascattach (struct device *, struct device *, void *);
int ascmatch (struct device *, struct cfdata *, void *);
void asc_enintr (struct sbic_softc *);
int asc_dmaok (void *, bus_dma_tag_t, struct sbic_acb *);
int asc_dmasetup (void *, bus_dma_tag_t, struct sbic_acb *, int);
int asc_dmanext (void *, bus_dma_tag_t, struct sbic_acb *, int);
void asc_dmastop (void *, bus_dma_tag_t, struct sbic_acb *);
void asc_dmafinish (void *, bus_dma_tag_t, struct sbic_acb *);
int asc_intr (void *);
void asc_minphys (struct buf *);
void asc_dump (void);
#ifdef DEBUG
int asc_dmadebug = 0;
#endif
CFATTACH_DECL(asc, sizeof(struct asc_softc),
ascmatch, ascattach, NULL, NULL);
extern struct cfdriver asc_cd;
u_long scsi_nosync;
int shift_nosync;
#if ASC_POLL > 0
int asc_poll = 0;
#endif
int
ascmatch(struct device *pdp, struct cfdata *cf, void *auxp)
{
struct podule_attach_args *pa = (struct podule_attach_args *)auxp;
/* Look for the card */
/* Standard ROM, skipping the MCS card that used the same ID. */
if (pa->pa_product == PODULE_ACORN_SCSI &&
strncmp(pa->pa_podule->description, "MCS", 3) != 0)
return 1;
/* PowerROM */
if (pa->pa_product == PODULE_ALSYSTEMS_SCSI &&
podulebus_initloader(pa) == 0 &&
podloader_callloader(pa, 0, 0) == PRID_ACORN_SCSI1)
return 1;
return 0;
}
void
ascattach(struct device *pdp, struct device *dp, void *auxp)
{
/* volatile struct sdmac *rp;*/
struct asc_softc *sc;
struct sbic_softc *sbic;
struct podule_attach_args *pa;
sc = (struct asc_softc *)dp;
pa = (struct podule_attach_args *)auxp;
if (pa->pa_podule_number == -1)
panic("Podule has disappeared !");
sc->sc_podule_number = pa->pa_podule_number;
sc->sc_podule = pa->pa_podule;
podules[sc->sc_podule_number].attached = 1;
sbic = &sc->sc_softc;
sbic->sc_enintr = asc_enintr;
sbic->sc_dmaok = asc_dmaok;
sbic->sc_dmasetup = asc_dmasetup;
sbic->sc_dmanext = asc_dmanext;
sbic->sc_dmastop = asc_dmastop;
sbic->sc_dmafinish = asc_dmafinish;
/* Map sbic */
sbic->sc_sbicp.sc_sbiciot = pa->pa_iot;
if (bus_space_map (sbic->sc_sbicp.sc_sbiciot,
sc->sc_podule->mod_base + ASC_SBIC, ASC_SBIC_SPACE, 0,
&sbic->sc_sbicp.sc_sbicioh))
panic("%s: Cannot map SBIC", dp->dv_xname);
sbic->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143;
sbic->sc_adapter.adapt_dev = &sbic->sc_dev;
sbic->sc_adapter.adapt_nchannels = 1;
sbic->sc_adapter.adapt_openings = 7;
sbic->sc_adapter.adapt_max_periph = 1;
sbic->sc_adapter.adapt_ioctl = NULL;
sbic->sc_adapter.adapt_minphys = asc_minphys;
sbic->sc_adapter.adapt_request = sbic_scsi_request;
sbic->sc_channel.chan_adapter = &sbic->sc_adapter;
sbic->sc_channel.chan_bustype = &scsi_bustype;
sbic->sc_channel.chan_channel = 0;
sbic->sc_channel.chan_ntargets = 8;
sbic->sc_channel.chan_nluns = 8;
sbic->sc_channel.chan_id = 7;
/* Provide an override for the host id */
(void)get_bootconf_option(boot_args, "asc.hostid",
BOOTOPT_TYPE_INT, &sbic->sc_channel.chan_id);
printf(": hostid=%d", sbic->sc_channel.chan_id);
#if ASC_POLL > 0
if (boot_args)
get_bootconf_option(boot_args, "ascpoll", BOOTOPT_TYPE_BOOLEAN,
&asc_poll);
if (asc_poll) {
sbic->sc_adapter.adapt_flags |= SCSIPI_ADAPT_POLL_ONLY;
printf(" polling");
}
#endif
printf("\n");
sc->sc_pagereg = sc->sc_podule->fast_base + ASC_PAGEREG;
sc->sc_intstat = sc->sc_podule->fast_base + ASC_INTSTATUS;
/* Reset the card */
WriteByte(sc->sc_pagereg, 0x80);
DELAY(500000);
WriteByte(sc->sc_pagereg, 0x00);
DELAY(250000);
sbicinit(sbic);
/* If we are polling only, we don't need a interrupt handler. */
#ifdef ASC_POLL
if (!asc_poll)
#endif
{
evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
dp->dv_xname, "intr");
sc->sc_ih = podulebus_irq_establish(pa->pa_ih, IPL_BIO,
asc_intr, sc, &sc->sc_intrcnt);
if (sc->sc_ih == NULL)
panic("%s: Cannot claim podule IRQ", dp->dv_xname);
}
/*
* attach all scsi units on us
*/
config_found(dp, &sbic->sc_channel, scsiprint);
}
void
asc_enintr(struct sbic_softc *sbicsc)
{
struct asc_softc *sc = (struct asc_softc *)sbicsc;
sbicsc->sc_flags |= SBICF_INTR;
WriteByte(sc->sc_pagereg, 0x40);
}
int
asc_dmaok (void *dma_h, bus_dma_tag_t dma_t, struct sbic_acb *acb)
{
return 0;
}
int
asc_dmasetup (void *dma_h, bus_dma_tag_t dma_t, struct sbic_acb *acb, int dir)
{
printf("asc_dmasetup()");
#ifdef DDB
Debugger();
#else
panic("Hit a brick wall");
#endif
return 0;
}
int
asc_dmanext (void *dma_h, bus_dma_tag_t dma_t, struct sbic_acb *acb, int dir)
{
printf("asc_dmanext()");
#ifdef DDB
Debugger();
#else
panic("Hit a brick wall");
#endif
return 0;
}
void
asc_dmastop (void *dma_h, bus_dma_tag_t dma_t, struct sbic_acb *acb)
{
printf("asc_dmastop\n");
}
void
asc_dmafinish (void *dma_h, bus_dma_tag_t dma_t, struct sbic_acb *acb)
{
printf("asc_dmafinish\n");
}
void
asc_dump(void)
{
int i;
struct sbi_softc *sc;
for (i = 0; i < asc_cd.cd_ndevs; ++i) {
sc = device_lookup_private(&asc_cd, i);
if (sc != NULL)
sbic_dump(sc);
}
}
int
asc_intr(void *arg)
{
struct asc_softc *sc = arg;
int intr;
/* printf("ascintr:");*/
intr = ReadByte(sc->sc_intstat);
/* printf("%02x\n", intr);*/
if (intr & IS_SBIC_IRQ)
sbicintr((struct sbic_softc *)sc);
return 0; /* Pass interrupt on down the chain */
}
/*
* limit the transfer as required.
*/
void
asc_minphys(struct buf *bp)
{
#if 0
/*
* We must limit the DMA xfer size
*/
if (bp->b_bcount > MAX_DMA_LEN) {
printf("asc: Reducing DMA length\n");
bp->b_bcount = MAX_DMA_LEN;
}
#endif
minphys(bp);
}