/* $NetBSD: gtsc.c,v 1.43 2021/08/07 16:18:41 thorpej Exp $ */
/*
* 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.
*
* @(#)dma.c
*/
/*
* Copyright (c) 1994 Christian E. Hopps
*
* 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.
*
* @(#)dma.c
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: gtsc.c,v 1.43 2021/08/07 16:18:41 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/intr.h>
#include <machine/cpu.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <amiga/amiga/custom.h>
#include <amiga/amiga/cc.h>
#include <amiga/amiga/device.h>
#include <amiga/amiga/isr.h>
#include <amiga/dev/dmavar.h>
#include <amiga/dev/sbicreg.h>
#include <amiga/dev/sbicvar.h>
#include <amiga/dev/gtscreg.h>
#include <amiga/dev/zbusvar.h>
#include <amiga/dev/gvpbusvar.h>
void gtscattach(device_t, device_t, void *);
int gtscmatch(device_t, cfdata_t, void *);
void gtsc_enintr(struct sbic_softc *);
void gtsc_dmastop(struct sbic_softc *);
int gtsc_dmanext(struct sbic_softc *);
int gtsc_dmaintr(void *);
int gtsc_dmago(struct sbic_softc *, char *, int, int);
#ifdef DEBUG
void gtsc_dump(void);
#endif
int gtsc_maxdma = 0; /* Maximum size per DMA transfer */
int gtsc_dmamask = 0;
int gtsc_dmabounce = 0;
int gtsc_clock_override = 0;
#ifdef DEBUG
int gtsc_debug = 0;
#endif
CFATTACH_DECL_NEW(gtsc, sizeof(struct sbic_softc),
gtscmatch, gtscattach, NULL, NULL);
int
gtscmatch(device_t parent, cfdata_t cf, void *aux)
{
struct gvpbus_args *gap;
gap = aux;
if (gap->flags & GVP_SCSI)
return(1);
return(0);
}
/*
* attach all devices on our board.
*/
void
gtscattach(device_t parent, device_t self, void *aux)
{
volatile struct sdmac *rp;
struct gvpbus_args *gap;
struct sbic_softc *sc = device_private(self);
struct scsipi_adapter *adapt = &sc->sc_adapter;
struct scsipi_channel *chan = &sc->sc_channel;
gap = aux;
sc->sc_dev = self;
sc->sc_cregs = rp = gap->zargs.va;
/*
* disable ints and reset bank register
*/
rp->CNTR = 0;
amiga_membarrier();
if ((gap->flags & GVP_NOBANK) == 0) {
rp->bank = 0;
amiga_membarrier();
}
sc->sc_dmago = gtsc_dmago;
sc->sc_enintr = gtsc_enintr;
sc->sc_dmanext = gtsc_dmanext;
sc->sc_dmastop = gtsc_dmastop;
sc->sc_dmacmd = 0;
sc->sc_flags |= SBICF_BADDMA;
if (gtsc_dmamask)
sc->sc_dmamask = gtsc_dmamask;
else if (gap->flags & GVP_24BITDMA)
sc->sc_dmamask = ~0x00ffffff;
else if (gap->flags & GVP_25BITDMA)
sc->sc_dmamask = ~0x01ffffff;
else
sc->sc_dmamask = ~0x07ffffff;
printf(": dmamask 0x%lx", ~sc->sc_dmamask);
if ((gap->flags & GVP_NOBANK) == 0)
sc->gtsc_bankmask = (~sc->sc_dmamask >> 18) & 0x01c0;
#if 0
/*
* if the user requests a bounce buffer or
* the users kva space is not ztwo and DMA needs it
* try and allocate a bounce buffer. If we allocate
* one and it is in ztwo space leave maxdma to user
* setting or default to MAXPHYS else the address must
* be on the chip bus so decrease it to either the users
* setting or 1024 bytes.
*
* XXX this needs to change if we move to multiple memory segments.
*/
if (gtsc_dmabounce || kvtop(sc) & sc->sc_dmamask) {
sc->sc_dmabuffer = (char *) alloc_z2mem(MAXPHYS * 8); /* XXX */
if (isztwomem(sc->sc_dmabuffer))
printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer));
else if (gtsc_maxdma == 0) {
gtsc_maxdma = 1024;
printf(" bounce pa 0x%x",
PREP_DMA_MEM(sc->sc_dmabuffer));
}
}
#endif
if (gtsc_maxdma == 0)
gtsc_maxdma = MAXPHYS;
printf(" flags %x", gap->flags);
printf(" maxdma %d\n", gtsc_maxdma);
sc->sc_sbic.sbic_asr_p = (volatile unsigned char *)rp + 0x61;
sc->sc_sbic.sbic_value_p = (volatile unsigned char *)rp + 0x63;
amiga_membarrier();
sc->sc_clkfreq = gtsc_clock_override ? gtsc_clock_override :
((gap->flags & GVP_14MHZ) ? 143 : 72);
printf("sc_clkfreg: %ld.%ld MHz\n", sc->sc_clkfreq / 10, sc->sc_clkfreq % 10);
/*
* Fill in the scsipi_adapter.
*/
memset(adapt, 0, sizeof(*adapt));
adapt->adapt_dev = self;
adapt->adapt_nchannels = 1;
adapt->adapt_openings = 7;
adapt->adapt_max_periph = 1;
adapt->adapt_request = sbic_scsipi_request;
adapt->adapt_minphys = sbic_minphys;
/*
* Fill in the scsipi_channel.
*/
memset(chan, 0, sizeof(*chan));
chan->chan_adapter = adapt;
chan->chan_bustype = &scsi_bustype;
chan->chan_channel = 0;
chan->chan_ntargets = 8;
chan->chan_nluns = 8;
chan->chan_id = 7;
sbicinit(sc);
sc->sc_isr.isr_intr = gtsc_dmaintr;
sc->sc_isr.isr_arg = sc;
sc->sc_isr.isr_ipl = 2;
add_isr(&sc->sc_isr);
/*
* attach all scsi units on us
*/
config_found(self, chan, scsiprint, CFARGS_NONE);
}
void
gtsc_enintr(struct sbic_softc *dev)
{
volatile struct sdmac *sdp;
sdp = dev->sc_cregs;
dev->sc_flags |= SBICF_INTR;
sdp->CNTR = GVP_CNTR_INTEN;
amiga_membarrier();
}
int
gtsc_dmago(struct sbic_softc *dev, char *addr, int count, int flags)
{
volatile struct sdmac *sdp;
sdp = dev->sc_cregs;
/*
* Set up the command word based on flags
*/
dev->sc_dmacmd = GVP_CNTR_INTEN;
if ((flags & DMAGO_READ) == 0)
dev->sc_dmacmd |= GVP_CNTR_DDIR;
#ifdef DEBUG
if (gtsc_debug & DDB_IO)
printf("gtsc_dmago: cmd %x\n", dev->sc_dmacmd);
#endif
dev->sc_flags |= SBICF_INTR;
sdp->CNTR = dev->sc_dmacmd;
amiga_membarrier();
if((u_int)dev->sc_cur->dc_addr & dev->sc_dmamask) {
#if 1
printf("gtsc_dmago: pa %p->%lx dmacmd %x",
dev->sc_cur->dc_addr,
(u_int)dev->sc_cur->dc_addr & ~dev->sc_dmamask,
dev->sc_dmacmd);
#endif
sdp->ACR = 0x00f80000; /***********************************/
} else
sdp->ACR = (u_int) dev->sc_cur->dc_addr;
amiga_membarrier();
if (dev->gtsc_bankmask) {
sdp->bank =
dev->gtsc_bankmask & (((u_int)dev->sc_cur->dc_addr) >> 18);
amiga_membarrier();
}
sdp->ST_DMA = 1;
amiga_membarrier();
/*
* restrict transfer count to maximum
*/
if (dev->sc_tcnt > gtsc_maxdma)
dev->sc_tcnt = gtsc_maxdma;
#if 1
if((u_int)dev->sc_cur->dc_addr & dev->sc_dmamask)
printf(" tcnt %ld\n", dev->sc_tcnt);
#endif
return(dev->sc_tcnt);
}
void
gtsc_dmastop(struct sbic_softc *dev)
{
volatile struct sdmac *sdp;
int s;
sdp = dev->sc_cregs;
#ifdef DEBUG
if (gtsc_debug & DDB_FOLLOW)
printf("gtsc_dmastop()\n");
#endif
if (dev->sc_dmacmd) {
/*
* clear possible interrupt and stop DMA
*/
s = splbio();
sdp->CNTR &= ~GVP_CNTR_INT_P;
amiga_membarrier();
sdp->SP_DMA = 1;
amiga_membarrier();
dev->sc_dmacmd = 0;
splx(s);
}
}
int
gtsc_dmaintr(void *arg)
{
struct sbic_softc *dev = arg;
volatile struct sdmac *sdp;
int stat;
sdp = dev->sc_cregs;
stat = sdp->CNTR;
amiga_membarrier();
if ((stat & GVP_CNTR_INT_P) == 0)
return (0);
#ifdef DEBUG
if (gtsc_debug & DDB_FOLLOW)
printf("%s: dmaintr 0x%x\n", device_xname(dev->sc_dev), stat);
#endif
if (dev->sc_flags & SBICF_INTR)
if (sbicintr(dev))
return (1);
return(0);
}
int
gtsc_dmanext(struct sbic_softc *dev)
{
volatile struct sdmac *sdp;
sdp = dev->sc_cregs;
if (dev->sc_cur > dev->sc_last) {
/* shouldn't happen !! */
printf("gtsc_dmanext at end !!!\n");
gtsc_dmastop(dev);
return(0);
}
/*
* clear possible interrupt and stop DMA
*/
sdp->CNTR &= ~GVP_CNTR_INT_P;
amiga_membarrier();
sdp->SP_DMA = 1;
amiga_membarrier();
sdp->CNTR = dev->sc_dmacmd;
amiga_membarrier();
sdp->ACR = (u_int) dev->sc_cur->dc_addr;
amiga_membarrier();
if (dev->gtsc_bankmask) {
sdp->bank =
dev->gtsc_bankmask & ((u_int)dev->sc_cur->dc_addr >> 18);
amiga_membarrier();
}
sdp->ST_DMA = 1;
amiga_membarrier();
dev->sc_tcnt = dev->sc_cur->dc_count << 1;
if (dev->sc_tcnt > gtsc_maxdma)
dev->sc_tcnt = gtsc_maxdma;
#ifdef DEBUG
if (gtsc_debug & DDB_FOLLOW)
printf("gtsc_dmanext ret: %ld\n", dev->sc_tcnt);
#endif
return(dev->sc_tcnt);
}
#ifdef DEBUG
void
gtsc_dump(void)
{
extern struct cfdriver gtsc_cd;
struct sbic_softc *sc;
int i;
for (i = 0; i < gtsc_cd.cd_ndevs; ++i) {
sc = device_lookup_private(>sc_cd, i);
if (sc != NULL)
sbic_dump(sc);
}
}
#endif
