/* * Copyright (c) 1994 Christian E. Hopps * 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. * * @(#)dma.c * $Id: ahsc.c,v 1.3 1994/05/16 04:55:05 chopps Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include int ahscprint __P((void *auxp, char *)); void ahscattach __P((struct device *, struct device *, void *)); int ahscmatch __P((struct device *, struct cfdata *, void *)); void ahsc_dmafree __P((struct sbic_softc *)); void ahsc_dmastop __P((struct sbic_softc *)); int ahsc_dmanext __P((struct sbic_softc *)); int ahsc_dmaintr __P((void)); int ahsc_dmago __P((struct sbic_softc *, char *, int, int)); struct scsi_adapter ahsc_scsiswitch = { sbic_scsicmd, sbic_minphys, 0, /* no lun support */ 0, /* no lun support */ sbic_adinfo, "ahsc", }; struct scsi_device ahsc_scsidev = { NULL, /* use default error handler */ NULL, /* do not have a start functio */ NULL, /* have no async handler */ NULL, /* Use default done routine */ "ahsc", 0, }; #ifdef DEBUG void ahsc_dmatimeout __P((void *)); int ahsc_dmadebug = 0; #endif struct cfdriver ahsccd = { NULL, "ahsc", ahscmatch, ahscattach, DV_DULL, sizeof(struct sbic_softc), NULL, 0 }; /* * if we are an A3000 we are here. */ int ahscmatch(pdp, cdp, auxp) struct device *pdp; struct cfdata *cdp; void *auxp; { char *mbusstr; mbusstr = auxp; if (is_a3000() && matchname(auxp, "ahsc")) return(1); return(0); } void ahscattach(pdp, dp, auxp) struct device *pdp, *dp; void *auxp; { volatile struct sdmac *rp; struct sbic_softc *sc; printf("\n"); sc = (struct sbic_softc *)dp; sc->sc_cregs = rp = ztwomap(0xdd0000); /* * disable ints and reset bank register */ rp->CNTR = CNTR_PDMD; rp->DAWR = DAWR_AHSC; sc->sc_dmafree = ahsc_dmafree; sc->sc_dmago = ahsc_dmago; sc->sc_dmanext = ahsc_dmanext; sc->sc_dmastop = ahsc_dmastop; sc->sc_dmacmd = 0; #ifdef DEBUG /* make sure timeout is really not needed */ timeout(ahsc_dmatimeout, 0, 30 * hz); #endif /* * eveything is a valid dma address */ sc->sc_dmamask = 0; sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x41); sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; sbicreset(sc); sc->sc_link.adapter_softc = sc; sc->sc_link.adapter_targ = 7; sc->sc_link.adapter = &ahsc_scsiswitch; sc->sc_link.device = &ahsc_scsidev; TAILQ_INIT(&sc->sc_xslist); custom.intreq = INTF_PORTS; custom.intena = INTF_SETCLR | INTF_PORTS; /* * attach all scsi units on us */ config_found(dp, &sc->sc_link, ahscprint); } /* * print diag if pnp is NULL else just extra */ int ahscprint(auxp, pnp) void *auxp; char *pnp; { if (pnp == NULL) return(UNCONF); return(QUIET); } void ahsc_dmafree(dev) struct sbic_softc *dev; { volatile struct sdmac *sdp; int s; sdp = dev->sc_cregs; s = splbio(); #ifdef DEBUG dev->sc_dmatimo = 0; #endif if (dev->sc_dmacmd) { if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { /* * only FLUSH if terminal count not enabled, * and reading from peripheral */ sdp->FLUSH = 1; while ((sdp->ISTR & ISTR_FE_FLG) == 0) ; } /* * clear possible interrupt and stop dma */ sdp->CINT = 1; sdp->SP_DMA = 1; dev->sc_dmacmd = 0; } /* * disable interrupts */ sdp->CNTR = CNTR_PDMD; /* disable interrupts from dma/scsi */ dev->sc_flags &= ~SBICF_INTR; splx(s); } int ahsc_dmago(dev, addr, count, flags) struct sbic_softc *dev; char *addr; int count, flags; { volatile struct sdmac *sdp; sdp = dev->sc_cregs; /* * Set up the command word based on flags */ dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN; if ((flags & DMAGO_READ) == 0) dev->sc_dmacmd |= CNTR_DDIR; #ifdef DEBUG if (ahsc_dmadebug & DDB_IO) printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd); dev->sc_dmatimo = 1; #endif dev->sc_flags |= SBICF_INTR; sdp->CNTR = dev->sc_dmacmd; sdp->ACR = (u_int) dev->sc_cur->dc_addr; sdp->ST_DMA = 1; return(dev->sc_tcnt); } void ahsc_dmastop(dev) struct sbic_softc *dev; { volatile struct sdmac *sdp; int s; sdp = dev->sc_cregs; #ifdef DEBUG if (ahsc_dmadebug & DDB_FOLLOW) printf("ahsc_dmastop()\n"); dev->sc_dmatimo = 0; #endif if (dev->sc_dmacmd) { s = splbio(); if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { /* * only FLUSH if terminal count not enabled, * and reading from peripheral */ sdp->FLUSH = 1; while ((sdp->ISTR & ISTR_FE_FLG) == 0) ; } /* * clear possible interrupt and stop dma */ sdp->CINT = 1; sdp->SP_DMA = 1; dev->sc_dmacmd = 0; splx(s); } } int ahsc_dmaintr() { volatile struct sdmac *sdp; struct sbic_softc *dev; int i, stat, found; found = 0; for (i = 0; i < ahsccd.cd_ndevs; i++) { dev = ahsccd.cd_devs[i]; if (dev == NULL) continue; sdp = dev->sc_cregs; stat = sdp->ISTR; if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) continue; #ifdef DEBUG if (ahsc_dmadebug & DDB_FOLLOW) printf("ahsc_dmaintr (%d, 0x%x)\n", i, stat); #endif /* * both, SCSI and DMA interrupts arrive here. I chose * arbitrarily that DMA interrupts should have higher * precedence than SCSI interrupts. */ if (stat & ISTR_E_INT) { found++; sdp->CINT = 1; /* clear possible interrupt */ /* * check for SCSI ints in the same go and * eventually save an interrupt */ } if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS) found += sbicintr(dev); } return(found); } int ahsc_dmanext(dev) struct sbic_softc *dev; { volatile struct sdmac *sdp; int i, stat; sdp = dev->sc_cregs; if (dev->sc_cur > dev->sc_last) { /* shouldn't happen !! */ printf("ahsc_dmanext at end !!!\n"); ahsc_dmastop(dev); return(0); } #ifdef DEBUG dev->sc_dmatimo = 1; #endif if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) { /* * only FLUSH if terminal count not enabled, * and reading from peripheral */ sdp->FLUSH = 1; while ((sdp->ISTR & ISTR_FE_FLG) == 0) ; } /* * clear possible interrupt and stop dma */ sdp->CINT = 1; /* clear possible interrupt */ sdp->SP_DMA = 1; /* stop dma */ sdp->CNTR = dev->sc_dmacmd; sdp->ACR = (u_int)dev->sc_cur->dc_addr; sdp->ST_DMA = 1; dev->sc_tcnt = dev->sc_cur->dc_count << 1; return(dev->sc_tcnt); } #ifdef DEBUG /*ARGSUSED*/ void ahsc_dmatimeout(arg) void *arg; { struct sbic_softc *dev; int i, s; for (i = 0; i < ahsccd.cd_ndevs; i++) { dev = ahsccd.cd_devs[i]; if (dev == NULL) continue; s = splbio(); if (dev->sc_dmatimo) { if (dev->sc_dmatimo > 1) printf("ahsc_dma%d: timeout #%d\n", dev->sc_dev.dv_unit, dev->sc_dmatimo - 1); dev->sc_dmatimo++; } splx(s); } timeout(ahsc_dmatimeout, 0, 30 * hz); } #endif