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NetBSD/sys/arch/mvme68k/dev/wdsc.c

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/* $NetBSD: wdsc.c,v 1.15 1999/02/20 00:12:02 scw Exp $ */
/*
* Copyright (c) 1996 Steve Woodford
* 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. 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.
*
* @(#)wdsc.c
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <machine/autoconf.h>
#include <mvme68k/dev/dmavar.h>
#include <mvme68k/dev/pccreg.h>
#include <mvme68k/dev/pccvar.h>
#include <mvme68k/dev/sbicreg.h>
#include <mvme68k/dev/sbicvar.h>
#include <mvme68k/dev/wdscreg.h>
void wdsc_pcc_attach __P((struct device *, struct device *, void *));
int wdsc_pcc_match __P((struct device *, struct cfdata *, void *));
void wdsc_enintr __P((struct sbic_softc *));
int wdsc_dmago __P((struct sbic_softc *, char *, int, int));
int wdsc_dmanext __P((struct sbic_softc *));
void wdsc_dmastop __P((struct sbic_softc *));
int wdsc_dmaintr __P((void *));
int wdsc_scsiintr __P((void *));
struct scsipi_device wdsc_scsidev = {
NULL, /* use default error handler */
NULL, /* do not have a start functio */
NULL, /* have no async handler */
NULL, /* Use default done routine */
};
struct cfattach wdsc_pcc_ca = {
sizeof(struct sbic_softc), wdsc_pcc_match, wdsc_pcc_attach
};
extern struct cfdriver wdsc_cd;
/*
* Match for SCSI devices on the onboard WD33C93 chip
*/
int
wdsc_pcc_match(pdp, cf, auxp)
struct device *pdp;
struct cfdata *cf;
void *auxp;
{
struct pcc_attach_args *pa = auxp;
if (strcmp(pa->pa_name, wdsc_cd.cd_name))
return (0);
pa->pa_ipl = cf->pcccf_ipl;
return (1);
}
/*
* Attach the wdsc driver
*/
void
wdsc_pcc_attach(pdp, dp, auxp)
struct device *pdp, *dp;
void *auxp;
{
struct sbic_softc *sc = (struct sbic_softc *)dp;
struct pcc_attach_args *pa = auxp;
static int attached = 0;
int tmp;
if ( attached )
panic("wdsc: Driver already attached!");
attached = 1;
sc->sc_enintr = wdsc_enintr;
sc->sc_dmago = wdsc_dmago;
sc->sc_dmanext = wdsc_dmanext;
sc->sc_dmastop = wdsc_dmastop;
sc->sc_dmacmd = 0;
sc->sc_adapter.scsipi_cmd = sbic_scsicmd;
sc->sc_adapter.scsipi_minphys = sbic_minphys;
sc->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
sc->sc_link.adapter_softc = sc;
sc->sc_link.scsipi_scsi.adapter_target = 7;
sc->sc_link.adapter = &sc->sc_adapter;
sc->sc_link.device = &wdsc_scsidev;
sc->sc_link.openings = 2;
sc->sc_link.scsipi_scsi.max_target = 7;
sc->sc_link.scsipi_scsi.max_lun = 7;
sc->sc_link.type = BUS_SCSI;
printf(": WD33C93 SCSI, target %d\n",
sc->sc_link.scsipi_scsi.adapter_target);
sc->sc_cregs = (volatile void *)sys_pcc;
sc->sc_sbicp = (sbic_regmap_p) PCC_VADDR(pa->pa_offset);
/*
* Eveything is a valid dma address.
*/
sc->sc_dmamask = 0;
/*
* The onboard WD33C93 of the '147 is usually clocked at 10MHz...
* (We use 10 times this for accuracy in later calculations)
*/
sc->sc_clkfreq = 100;
/*
* Initialise the hardware
*/
sbicinit(sc);
/*
* Fix up the interrupts
*/
sc->sc_ipl = pa->pa_ipl & PCC_IMASK;
sys_pcc->scsi_int = sc->sc_ipl | PCC_ICLEAR;
sys_pcc->dma_int = sc->sc_ipl | PCC_ICLEAR;
sys_pcc->dma_csr = 0;
pccintr_establish(PCCV_SCSID, wdsc_dmaintr, sc->sc_ipl, sc);
pccintr_establish(PCCV_SCSIP, wdsc_scsiintr, sc->sc_ipl, sc);
sys_pcc->scsi_int = sc->sc_ipl | PCC_IENABLE | PCC_ICLEAR;
/*
* Attach all scsi units on us, watching for boot device
* (see dk_establish).
*/
tmp = bootpart;
if (PCC_PADDR(pa->pa_offset) != bootaddr)
bootpart = -1; /* invalid flag to dk_establish */
(void)config_found(dp, &sc->sc_link, scsiprint);
bootpart = tmp; /* restore old value */
}
/*
* Enable DMA interrupts
*/
void
wdsc_enintr(dev)
struct sbic_softc *dev;
{
volatile struct pcc *pc = dev->sc_cregs;
dev->sc_flags |= SBICF_INTR;
pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR;
}
/*
* Prime the hardware for a DMA transfer
*/
int
wdsc_dmago(dev, addr, count, flags)
struct sbic_softc *dev;
char *addr;
int count, flags;
{
volatile struct pcc *pc = dev->sc_cregs;
/*
* Set up the command word based on flags
*/
if ( (flags & DMAGO_READ) == 0 )
dev->sc_dmacmd = DMAC_CSR_ENABLE | DMAC_CSR_WRITE;
else
dev->sc_dmacmd = DMAC_CSR_ENABLE;
dev->sc_flags |= SBICF_INTR;
dev->sc_tcnt = dev->sc_cur->dc_count << 1;
/*
* Prime the hardware.
* Note, it's probably not necessary to do this here, since dmanext
* is called just prior to the actual transfer.
*/
pc->dma_csr = 0;
pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR;
pc->dma_daddr = (unsigned long)dev->sc_cur->dc_addr;
pc->dma_bcnt = (unsigned long)dev->sc_tcnt | (1 << 24);
pc->dma_csr = dev->sc_dmacmd;
return(dev->sc_tcnt);
}
/*
* Prime the hardware for the next DMA transfer
*/
int
wdsc_dmanext(dev)
struct sbic_softc *dev;
{
volatile struct pcc *pc = dev->sc_cregs;
if ( dev->sc_cur > dev->sc_last ) {
/*
* Shouldn't happen !!
*/
printf("wdsc_dmanext at end !!!\n");
wdsc_dmastop(dev);
return(0);
}
dev->sc_tcnt = dev->sc_cur->dc_count << 1;
/*
* Load the next DMA address
*/
pc->dma_csr = 0;
pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR;
pc->dma_daddr = (unsigned long)dev->sc_cur->dc_addr;
pc->dma_bcnt = (unsigned long)dev->sc_tcnt | (1 << 24);
pc->dma_csr = dev->sc_dmacmd;
return(dev->sc_tcnt);
}
/*
* Stop DMA, and disable interrupts
*/
void
wdsc_dmastop(dev)
struct sbic_softc *dev;
{
volatile struct pcc *pc = dev->sc_cregs;
int s;
s = splbio();
pc->dma_csr = 0;
pc->dma_int = dev->sc_ipl | PCC_ICLEAR;
splx(s);
}
/*
* Come here following a DMA interrupt
*/
int
wdsc_dmaintr(arg)
void *arg;
{
struct sbic_softc *dev = arg;
volatile struct pcc *pc = dev->sc_cregs;
int found = 0;
/*
* Really a DMA interrupt?
*/
if ( (pc->dma_int & 0x80) == 0 )
return(0);
/*
* Was it a completion interrupt?
* XXXSCW Note: Support for other DMA interrupts is required, eg. buserr
*/
if ( pc->dma_csr & DMAC_CSR_DONE ) {
++found;
pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR;
}
return(found);
}
/*
* Come here for SCSI interrupts
*/
int
wdsc_scsiintr(arg)
void *arg;
{
struct sbic_softc *dev = arg;
volatile struct pcc *pc = dev->sc_cregs;
int found;
/*
* Really a SCSI interrupt?
*/
if ( (pc->scsi_int & 0x80) == 0 )
return(0);
/*
* Go handle it
*/
found = sbicintr(dev);
/*
* Acknowledge and clear the interrupt
*/
pc->scsi_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR;
return(found);
}
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