/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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) 1994 Peter Galbavy. 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 Peter Galbavy.
* 4. 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.
*/
/*
* The TCDS ASIC cannot DMA across 8k boundaries, and this
* driver is written such that each DMA segment gets a new
* call to tcds_dma_setup(). Thus, the DMA map only needs
* to support 8k transfers.
*/
asc->sc_dmat = tcdsdev->tcdsda_dmat;
if ((error = bus_dmamap_create(asc->sc_dmat, PAGE_SIZE, 1, PAGE_SIZE,
PAGE_SIZE, BUS_DMA_NOWAIT, &asc->sc_dmamap)) < 0) {
aprint_error(": failed to create DMA map, error = %d\n", error);
return;
}
/*
* XXX More of this should be in ncr53c9x_attach(), but
* XXX should we really poke around the chip that much in
* XXX the MI code? Think about this more...
*/
/*
* Set up static configuration info.
*/
sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB;
sc->sc_cfg2 = NCRCFG2_SCSI2;
sc->sc_cfg3 = NCRCFG3_CDB;
if (sc->sc_freq > 25)
sc->sc_cfg3 |= NCRF9XCFG3_FCLK;
sc->sc_rev = tcdsdev->tcdsda_variant;
if (tcdsdev->tcdsda_fast) {
sc->sc_features |= NCR_F_FASTSCSI;
sc->sc_cfg3_fscsi = NCRF9XCFG3_FSCSI;
}
/*
* XXX minsync and maxxfer _should_ be set up in MI code,
* XXX but it appears to have some dependency on what sort
* XXX of DMA we're hooked up to, etc.
*/
/*
* This is the value used to start sync negotiations
* Note that the NCR register "SYNCTP" is programmed
* in "clocks per byte", and has a minimum value of 4.
* The SCSI period used in negotiation is one-fourth
* of the time (in nanoseconds) needed to transfer one byte.
* Since the chip's clock is given in MHz, we have the following
* formula: 4 * period = (1000 / freq) * 4
*/
sc->sc_minsync = (1000 / sc->sc_freq) * tcdsdev->tcdsda_period / 4;
sc->sc_maxxfer = 64 * 1024;
/* Do the common parts of attachment. */
sc->sc_adapter.adapt_minphys = minphys;
sc->sc_adapter.adapt_request = ncr53c9x_scsipi_request;
ncr53c9x_attach(sc);
}
/*
* the rules say we cannot transfer more than the limit
* of this DMA chip (64k) and we cannot cross a 8k boundary.
*/
size = uimin(*dmasize, DMAMAX((size_t)*addr));
asc->sc_dmaaddr = addr;
asc->sc_dmalen = len;
asc->sc_flags = (ispullup) ? ASC_ISPULLUP : 0;
*dmasize = asc->sc_dmasize = size;
/*
* Pseudo (chained) interrupt from the asc driver to kick the
* current running DMA transfer. Called from ncr53c9x_intr()
* for now.
*
* return 1 if it was a DMA continue.
*/
static int
tcds_dma_intr(struct ncr53c9x_softc *sc)
{
struct asc_softc *asc = (struct asc_softc *)sc;
struct tcds_slotconfig *tcds = asc->sc_tcds;
int trans, resid;
uint32_t tcl, tcm;
uint32_t dud, dudmask, *addr;
bus_addr_t pa;
NCR_DMA(("tcds_dma %d: intr", tcds->sc_slot));
if (tcds_scsi_iserr(tcds))
return 0;
/* This is an "assertion" :) */
if ((asc->sc_flags & ASC_DMAACTIVE) == 0)
panic("%s: DMA wasn't active", __func__);
/* DMA has stopped */
tcds_dma_enable(tcds, 0);
asc->sc_flags &= ~ASC_DMAACTIVE;
