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/* $FreeBSD$ */
/* $NecBSD: bshw_pdma.c,v 1.4 1997/10/31 17:43:39 honda Exp $ */
/* $NetBSD$ */
/*
* [NetBSD for NEC PC98 series]
* Copyright (c) 1994, 1995, 1996 NetBSD/pc98 porting staff.
* 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. 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.
*/
/*
* Copyright (c) 1994, 1995, 1996 Naofumi HONDA. All rights reserved.
*/
#define LC_SMIT_TIMEOUT 2 /* 2 sec: timeout for a fifo status ready */
static BS_INLINE void bshw_lc_smit_start __P((struct bs_softc *, int, u_int));
static int bshw_lc_smit_fstat __P((struct bs_softc *, int, int));
static void bshw_lc_smit_stop __P((struct bs_softc *));
/*********************************************************
* SM FIFO (GENERIC)
*********************************************************/
void
bshw_smitabort(bsc)
struct bs_softc *bsc;
{
if (bsc->sc_hw->hw_flags & BSHW_SMFIFO)
bshw_lc_smit_stop(bsc);
bshw_set_count(bsc, 0);
bsc->sc_flags &= ~BSSMITSTART;
}
void
bs_smit_xfer_end(ti)
struct targ_info *ti;
{
struct bs_softc *bsc = ti->ti_bsc;
struct sc_p *sp = &bsc->sc_p;
u_int count;
u_char *s;
bshw_lc_smit_stop(bsc);
bsc->sc_flags &= ~BSSMITSTART;
if (ti->ti_phase == DATAPHASE)
{
count = bshw_get_count(bsc);
if (count < (u_int) sp->datalen)
{
sp->data += (sp->datalen - count);
sp->datalen = count;
/* XXX:
* strict double checks!
* target => wd33c93c transfer counts
* wd33c93c => memory transfer counts
*/
if ((bsc->sc_dmadir & BSHW_READ) &&
count != bsc->sm_tdatalen)
{
s = "read count miss";
goto bad;
}
return;
}
else if (count == (u_int) sp->datalen)
{
return;
}
s = "strange count";
}
else
s = "extra smit interrupt";
bad:
bs_printf(ti, "smit_xfer_end", s);
ti->ti_error |= BSDMAABNORMAL;
}
/*********************************************************
* LOGITEC's SMIT TRANSFER
*********************************************************/
#define BSHW_LC_FSET 0x36
#define BSHW_LC_FCTRL 0x44
#define FCTRL_EN 0x01
#define FCTRL_WRITE 0x02
#define SF_ABORT 0x08
#define SF_RDY 0x10
#define LC_FSZ DEV_BSIZE
#define LC_SFSZ 0x0c
#define LC_REST (LC_FSZ - LC_SFSZ)
static void
bshw_lc_smit_stop(bsc)
struct bs_softc *bsc;
{
write_wd33c93(bsc, BSHW_LC_FCTRL, 0);
BUS_IOW(cmd_port, CMDP_DMER);
}
static BS_INLINE void
bshw_lc_smit_start(bsc, count, direction)
struct bs_softc *bsc;
int count;
u_int direction;
{
u_int8_t pval, val = read_wd33c93(bsc, BSHW_LC_FSET);
bsc->sc_flags |= BSSMITSTART;
bshw_set_count(bsc, count);
pval = FCTRL_EN;
if ((direction & BSHW_READ) == 0)
pval |= (val & 0xe0) | FCTRL_WRITE;
write_wd33c93(bsc, BSHW_LC_FCTRL, pval);
bshw_start_xfer(bsc);
}
static int
bshw_lc_smit_fstat(bsc, wc, read)
struct bs_softc *bsc;
int wc, read;
{
u_int8_t stat;
#define ALWAYS_ABORT
#ifdef ALWAYS_ABORT
if (read == BSHW_READ)
{
while (wc -- > 0)
{
BUS_IO_WEIGHT;
stat = BUS_IOR(cmd_port);
if (stat & SF_RDY)
return 0;
if (stat & SF_ABORT)
return EIO;
}
}
else
{
#endif /* ALWAYS_ABORT */
while (wc -- > 0)
{
BUS_IO_WEIGHT;
stat = BUS_IOR(cmd_port);
if (stat & SF_ABORT)
return EIO;
if (stat & SF_RDY)
return 0;
}
#ifdef ALWAYS_ABORT
}
#endif /* ALWAYS_ABORT */
bs_poll_timeout(bsc, "bshw_lc_smit");
return EIO;
}
void
bs_lc_smit_xfer(ti, direction)
struct targ_info *ti;
u_int direction;
{
struct bs_softc *bsc = ti->ti_bsc;
struct sc_p *sp = &bsc->sc_p;
int datalen, count, wc = LC_SMIT_TIMEOUT * 1024 * 1024;
u_int8_t *data;
sp->bufp = NULL;
sp->seglen = 0;
data = sp->data;
datalen = sp->datalen;
bsc->sc_dmadir = direction;
bshw_set_dma_trans(bsc, ti->ti_cfgflags);
bshw_lc_smit_start(bsc, sp->datalen, direction);
if (direction & BSHW_READ)
{
do
{
if (bshw_lc_smit_fstat(bsc, wc, BSHW_READ))
break;
count = (datalen > LC_FSZ ? LC_FSZ : datalen);
#ifdef __FreeBSD__
memcopy((u_int8_t *)ti->sm_offset, data, count);
#else /* NetBSD */
bus_space_read_region_4(bsc->sc_memt, bsc->sc_memh,
ti->sm_offset, (u_int32_t *) data, count >> 2);
#endif /* NetBSD */
data += count;
datalen -= count;
}
while (datalen > 0);
bsc->sm_tdatalen = datalen;
}
else
{
do
{
if (bshw_lc_smit_fstat(bsc, wc, BSHW_WRITE))
break;
count = (datalen > LC_SFSZ ? LC_SFSZ : datalen);
#ifdef __FreeBSD__
memcopy(data, (u_int8_t *)ti->sm_offset, count);
#else /* NetBSD */
bus_space_write_region_4(bsc->sc_memt, bsc->sc_memh,
ti->sm_offset, (u_int32_t *) data, count >> 2);
#endif /* NetBSD */
data += count;
datalen -= count;
if (bshw_lc_smit_fstat(bsc, wc, BSHW_WRITE))
break;
count = (datalen > LC_REST ? LC_REST : datalen);
#ifdef __FreeBSD__
memcopy(data, (u_int8_t *)(ti->sm_offset + LC_SFSZ), count);
#else /* NetBSD */
bus_space_write_region_4(bsc->sc_memt, bsc->sc_memh,
ti->sm_offset + LC_SFSZ,
(u_int32_t *) data, count >> 2);
#endif /* NetBSD */
data += count;
datalen -= count;
}
while (datalen > 0);
}
}
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