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260 lines
6.2 KiB
C
260 lines
6.2 KiB
C
/* $NecBSD: bshw_pdma.c,v 1.4 1997/10/31 17:43:39 honda Exp $ */
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/* $NetBSD$ */
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/*
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* [NetBSD for NEC PC98 series]
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* Copyright (c) 1994, 1995, 1996 NetBSD/pc98 porting staff.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1994, 1995, 1996 Naofumi HONDA. All rights reserved.
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*/
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#define LC_SMIT_TIMEOUT 2 /* 2 sec: timeout for a fifo status ready */
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static BS_INLINE void bshw_lc_smit_start __P((struct bs_softc *, int, u_int));
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static int bshw_lc_smit_fstat __P((struct bs_softc *, int, int));
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static BS_INLINE void bshw_lc_smit_stop __P((struct bs_softc *));
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/*********************************************************
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* SM FIFO (GENERIC)
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*********************************************************/
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void
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bshw_smitabort(bsc)
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struct bs_softc *bsc;
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{
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if (bsc->sc_hw->hw_flags & BSHW_SMFIFO)
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bshw_lc_smit_stop(bsc);
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bshw_set_count(bsc, 0);
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bsc->sc_flags &= ~BSSMITSTART;
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}
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void
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bs_smit_xfer_end(ti)
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struct targ_info *ti;
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{
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struct bs_softc *bsc = ti->ti_bsc;
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struct sc_p *sp = &bsc->sc_p;
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u_int count;
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u_char *s;
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bshw_lc_smit_stop(bsc);
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bsc->sc_flags &= ~BSSMITSTART;
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if (ti->ti_phase == DATAPHASE)
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{
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count = bshw_get_count(bsc);
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if (count < (u_int) sp->datalen)
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{
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sp->data += (sp->datalen - count);
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sp->datalen = count;
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/* XXX:
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* strict double checks!
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* target => wd33c93c transfer counts
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* wd33c93c => memory transfer counts
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*/
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if ((bsc->sc_dmadir & BSHW_READ) &&
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count != bsc->sm_tdatalen)
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{
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s = "read count miss";
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goto bad;
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}
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return;
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}
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else if (count == (u_int) sp->datalen)
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{
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return;
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}
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s = "strange count";
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}
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else
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s = "extra smit interrupt";
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bad:
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bs_printf(ti, "smit_xfer_end", s);
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ti->ti_error |= BSDMAABNORMAL;
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}
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/*********************************************************
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* LOGITEC's SMIT TRANSFER
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*********************************************************/
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#define BSHW_LC_FSET 0x36
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#define BSHW_LC_FCTRL 0x44
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#define FCTRL_EN 0x01
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#define FCTRL_WRITE 0x02
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#define SF_ABORT 0x08
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#define SF_RDY 0x10
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#define LC_FSZ DEV_BSIZE
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#define LC_SFSZ 0x0c
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#define LC_REST (LC_FSZ - LC_SFSZ)
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static BS_INLINE void
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bshw_lc_smit_stop(bsc)
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struct bs_softc *bsc;
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{
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write_wd33c93(bsc, BSHW_LC_FCTRL, 0);
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BUS_IOW(cmd_port, CMDP_DMER);
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}
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static BS_INLINE void
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bshw_lc_smit_start(bsc, count, direction)
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struct bs_softc *bsc;
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int count;
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u_int direction;
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{
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u_int8_t pval, val = read_wd33c93(bsc, BSHW_LC_FSET);
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bsc->sc_flags |= BSSMITSTART;
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bshw_set_count(bsc, count);
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pval = FCTRL_EN;
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if ((direction & BSHW_READ) == 0)
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pval |= (val & 0xe0) | FCTRL_WRITE;
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write_wd33c93(bsc, BSHW_LC_FCTRL, pval);
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bshw_start_xfer(bsc);
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}
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static int
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bshw_lc_smit_fstat(bsc, wc, read)
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struct bs_softc *bsc;
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int wc, read;
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{
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u_int8_t stat;
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#define ALWAYS_ABORT
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#ifdef ALWAYS_ABORT
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if (read == BSHW_READ)
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{
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while (wc -- > 0)
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{
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BUS_IO_WEIGHT;
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stat = BUS_IOR(cmd_port);
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if (stat & SF_RDY)
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return 0;
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if (stat & SF_ABORT)
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return EIO;
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}
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}
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else
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{
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#endif /* ALWAYS_ABORT */
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while (wc -- > 0)
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{
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BUS_IO_WEIGHT;
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stat = BUS_IOR(cmd_port);
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if (stat & SF_ABORT)
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return EIO;
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if (stat & SF_RDY)
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return 0;
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}
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#ifdef ALWAYS_ABORT
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}
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#endif /* ALWAYS_ABORT */
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bs_poll_timeout(bsc, "bshw_lc_smit");
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return EIO;
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}
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void
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bs_lc_smit_xfer(ti, direction)
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struct targ_info *ti;
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u_int direction;
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{
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struct bs_softc *bsc = ti->ti_bsc;
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struct sc_p *sp = &bsc->sc_p;
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int datalen, count, wc = LC_SMIT_TIMEOUT * 1024 * 1024;
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u_int8_t *data;
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sp->bufp = NULL;
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sp->seglen = 0;
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data = sp->data;
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datalen = sp->datalen;
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bsc->sc_dmadir = direction;
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bshw_set_dma_trans(bsc, ti->ti_cfgflags);
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bshw_lc_smit_start(bsc, sp->datalen, direction);
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if (direction & BSHW_READ)
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{
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do
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{
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if (bshw_lc_smit_fstat(bsc, wc, BSHW_READ))
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break;
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count = (datalen > LC_FSZ ? LC_FSZ : datalen);
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#ifdef __FreeBSD__
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memcopy((u_int8_t *)ti->sm_offset, data, count);
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#else /* NetBSD */
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bus_space_read_region_4(bsc->sc_memt, bsc->sc_memh,
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ti->sm_offset, (u_int32_t *) data, count >> 2);
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#endif /* NetBSD */
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data += count;
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datalen -= count;
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}
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while (datalen > 0);
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bsc->sm_tdatalen = datalen;
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}
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else
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{
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do
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{
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if (bshw_lc_smit_fstat(bsc, wc, BSHW_WRITE))
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break;
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count = (datalen > LC_SFSZ ? LC_SFSZ : datalen);
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#ifdef __FreeBSD__
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memcopy(data, (u_int8_t *)ti->sm_offset, count);
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#else /* NetBSD */
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bus_space_write_region_4(bsc->sc_memt, bsc->sc_memh,
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ti->sm_offset, (u_int32_t *) data, count >> 2);
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#endif /* NetBSD */
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data += count;
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datalen -= count;
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if (bshw_lc_smit_fstat(bsc, wc, BSHW_WRITE))
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break;
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count = (datalen > LC_REST ? LC_REST : datalen);
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#ifdef __FreeBSD__
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memcopy(data, (u_int8_t *)(ti->sm_offset + LC_SFSZ), count);
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#else /* NetBSD */
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bus_space_write_region_4(bsc->sc_memt, bsc->sc_memh,
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ti->sm_offset + LC_SFSZ,
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(u_int32_t *) data, count >> 2);
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#endif /* NetBSD */
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data += count;
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datalen -= count;
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}
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while (datalen > 0);
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}
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}
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