/* $NetBSD: gtsc.c,v 1.18 1996/10/10 23:55:58 christos Exp $ */ /* * 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 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include void gtscattach __P((struct device *, struct device *, void *)); int gtscmatch __P((struct device *, void *, void *)); void gtsc_enintr __P((struct sbic_softc *)); void gtsc_dmastop __P((struct sbic_softc *)); int gtsc_dmanext __P((struct sbic_softc *)); int gtsc_dmaintr __P((void *)); int gtsc_dmago __P((struct sbic_softc *, char *, int, int)); #ifdef DEBUG void gtsc_dump __P((void)); #endif struct scsi_adapter gtsc_scsiswitch = { sbic_scsicmd, sbic_minphys, 0, /* no lun support */ 0, /* no lun support */ }; struct scsi_device gtsc_scsidev = { NULL, /* use default error handler */ NULL, /* have a queue served by this ??? */ NULL, /* have no async handler ??? */ NULL, /* Use default done routine */ }; 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 struct cfattach gtsc_ca = { sizeof(struct sbic_softc), gtscmatch, gtscattach }; struct cfdriver gtsc_cd = { NULL, "gtsc", DV_DULL, NULL, 0 }; int gtscmatch(pdp, match, auxp) struct device *pdp; void *match, *auxp; { struct gvpbus_args *gap; gap = auxp; if (gap->flags & GVP_SCSI) return(1); return(0); } /* * attach all devices on our board. */ void gtscattach(pdp, dp, auxp) struct device *pdp, *dp; void *auxp; { volatile struct sdmac *rp; struct gvpbus_args *gap; struct sbic_softc *sc; gap = auxp; sc = (struct sbic_softc *)dp; sc->sc_cregs = rp = gap->zargs.va; /* * disable ints and reset bank register */ rp->CNTR = 0; if ((gap->flags & GVP_NOBANK) == 0) rp->bank = 0; 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; kprintf(": 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)) kprintf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); else if (gtsc_maxdma == 0) { gtsc_maxdma = 1024; kprintf(" bounce pa 0x%x", PREP_DMA_MEM(sc->sc_dmabuffer)); } } #endif if (gtsc_maxdma == 0) gtsc_maxdma = MAXPHYS; kprintf(" flags %x", gap->flags); kprintf(" maxdma %d\n", gtsc_maxdma); sc->sc_sbicp = (sbic_regmap_p) ((int)rp + 0x61); sc->sc_clkfreq = gtsc_clock_override ? gtsc_clock_override : ((gap->flags & GVP_14MHZ) ? 143 : 72); kprintf("sc_clkfreg: %ld.%ldMhz\n", sc->sc_clkfreq / 10, sc->sc_clkfreq % 10); sc->sc_link.channel = SCSI_CHANNEL_ONLY_ONE; sc->sc_link.adapter_softc = sc; sc->sc_link.adapter_target = 7; sc->sc_link.adapter = >sc_scsiswitch; sc->sc_link.device = >sc_scsidev; sc->sc_link.openings = 2; 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(dp, &sc->sc_link, scsiprint); } void gtsc_enintr(dev) struct sbic_softc *dev; { volatile struct sdmac *sdp; sdp = dev->sc_cregs; dev->sc_flags |= SBICF_INTR; sdp->CNTR = GVP_CNTR_INTEN; } int gtsc_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 = GVP_CNTR_INTEN; if ((flags & DMAGO_READ) == 0) dev->sc_dmacmd |= GVP_CNTR_DDIR; #ifdef DEBUG if (gtsc_debug & DDB_IO) kprintf("gtsc_dmago: cmd %x\n", dev->sc_dmacmd); #endif dev->sc_flags |= SBICF_INTR; sdp->CNTR = dev->sc_dmacmd; if((u_int)dev->sc_cur->dc_addr & dev->sc_dmamask) { #if 1 kprintf("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; if (dev->gtsc_bankmask) sdp->bank = dev->gtsc_bankmask & (((u_int)dev->sc_cur->dc_addr) >> 18); sdp->ST_DMA = 1; /* * 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) kprintf(" tcnt %ld\n", dev->sc_tcnt); #endif return(dev->sc_tcnt); } void gtsc_dmastop(dev) struct sbic_softc *dev; { volatile struct sdmac *sdp; int s; sdp = dev->sc_cregs; #ifdef DEBUG if (gtsc_debug & DDB_FOLLOW) kprintf("gtsc_dmastop()\n"); #endif if (dev->sc_dmacmd) { /* * clear possible interrupt and stop dma */ s = splbio(); sdp->CNTR &= ~GVP_CNTR_INT_P; sdp->SP_DMA = 1; dev->sc_dmacmd = 0; splx(s); } } int gtsc_dmaintr(arg) void *arg; { struct sbic_softc *dev = arg; volatile struct sdmac *sdp; int stat; sdp = dev->sc_cregs; stat = sdp->CNTR; if ((stat & GVP_CNTR_INT_P) == 0) return (0); #ifdef DEBUG if (gtsc_debug & DDB_FOLLOW) kprintf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); #endif if (dev->sc_flags & SBICF_INTR) if (sbicintr(dev)) return (1); return(0); } int gtsc_dmanext(dev) struct sbic_softc *dev; { volatile struct sdmac *sdp; sdp = dev->sc_cregs; if (dev->sc_cur > dev->sc_last) { /* shouldn't happen !! */ kprintf("gtsc_dmanext at end !!!\n"); gtsc_dmastop(dev); return(0); } /* * clear possible interrupt and stop dma */ sdp->CNTR &= ~GVP_CNTR_INT_P; sdp->SP_DMA = 1; sdp->CNTR = dev->sc_dmacmd; sdp->ACR = (u_int) dev->sc_cur->dc_addr; if (dev->gtsc_bankmask) sdp->bank = dev->gtsc_bankmask & ((u_int)dev->sc_cur->dc_addr >> 18); sdp->ST_DMA = 1; 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) kprintf("gtsc_dmanext ret: %ld\n", dev->sc_tcnt); #endif return(dev->sc_tcnt); } #ifdef DEBUG void gtsc_dump() { int i; for (i = 0; i < gtsc_cd.cd_ndevs; ++i) if (gtsc_cd.cd_devs[i]) sbic_dump(gtsc_cd.cd_devs[i]); } #endif