/* $NetBSD: gtsc.c,v 1.41 2012/10/27 17:17:29 chs Exp $ */ /* * 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. 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 */ /* * Copyright (c) 1994 Christian E. Hopps * * 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 __KERNEL_RCSID(0, "$NetBSD: gtsc.c,v 1.41 2012/10/27 17:17:29 chs Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include void gtscattach(device_t, device_t, void *); int gtscmatch(device_t, cfdata_t, void *); void gtsc_enintr(struct sbic_softc *); void gtsc_dmastop(struct sbic_softc *); int gtsc_dmanext(struct sbic_softc *); int gtsc_dmaintr(void *); int gtsc_dmago(struct sbic_softc *, char *, int, int); #ifdef DEBUG void gtsc_dump(void); #endif 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 CFATTACH_DECL_NEW(gtsc, sizeof(struct sbic_softc), gtscmatch, gtscattach, NULL, NULL); int gtscmatch(device_t parent, cfdata_t cf, void *aux) { struct gvpbus_args *gap; gap = aux; if (gap->flags & GVP_SCSI) return(1); return(0); } /* * attach all devices on our board. */ void gtscattach(device_t parent, device_t self, void *aux) { volatile struct sdmac *rp; struct gvpbus_args *gap; struct sbic_softc *sc = device_private(self); struct scsipi_adapter *adapt = &sc->sc_adapter; struct scsipi_channel *chan = &sc->sc_channel; gap = aux; sc->sc_dev = self; sc->sc_cregs = rp = gap->zargs.va; /* * disable ints and reset bank register */ rp->CNTR = 0; amiga_membarrier(); if ((gap->flags & GVP_NOBANK) == 0) { rp->bank = 0; amiga_membarrier(); } 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; printf(": 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)) printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer)); else if (gtsc_maxdma == 0) { gtsc_maxdma = 1024; printf(" bounce pa 0x%x", PREP_DMA_MEM(sc->sc_dmabuffer)); } } #endif if (gtsc_maxdma == 0) gtsc_maxdma = MAXPHYS; printf(" flags %x", gap->flags); printf(" maxdma %d\n", gtsc_maxdma); sc->sc_sbic.sbic_asr_p = (volatile unsigned char *)rp + 0x61; sc->sc_sbic.sbic_value_p = (volatile unsigned char *)rp + 0x63; amiga_membarrier(); sc->sc_clkfreq = gtsc_clock_override ? gtsc_clock_override : ((gap->flags & GVP_14MHZ) ? 143 : 72); printf("sc_clkfreg: %ld.%ld MHz\n", sc->sc_clkfreq / 10, sc->sc_clkfreq % 10); /* * Fill in the scsipi_adapter. */ memset(adapt, 0, sizeof(*adapt)); adapt->adapt_dev = self; adapt->adapt_nchannels = 1; adapt->adapt_openings = 7; adapt->adapt_max_periph = 1; adapt->adapt_request = sbic_scsipi_request; adapt->adapt_minphys = sbic_minphys; /* * Fill in the scsipi_channel. */ memset(chan, 0, sizeof(*chan)); chan->chan_adapter = adapt; chan->chan_bustype = &scsi_bustype; chan->chan_channel = 0; chan->chan_ntargets = 8; chan->chan_nluns = 8; chan->chan_id = 7; 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(self, chan, scsiprint); } void gtsc_enintr(struct sbic_softc *dev) { volatile struct sdmac *sdp; sdp = dev->sc_cregs; dev->sc_flags |= SBICF_INTR; sdp->CNTR = GVP_CNTR_INTEN; amiga_membarrier(); } int gtsc_dmago(struct sbic_softc *dev, char *addr, int count, int 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) printf("gtsc_dmago: cmd %x\n", dev->sc_dmacmd); #endif dev->sc_flags |= SBICF_INTR; sdp->CNTR = dev->sc_dmacmd; amiga_membarrier(); if((u_int)dev->sc_cur->dc_addr & dev->sc_dmamask) { #if 1 printf("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; amiga_membarrier(); if (dev->gtsc_bankmask) { sdp->bank = dev->gtsc_bankmask & (((u_int)dev->sc_cur->dc_addr) >> 18); amiga_membarrier(); } sdp->ST_DMA = 1; amiga_membarrier(); /* * 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) printf(" tcnt %ld\n", dev->sc_tcnt); #endif return(dev->sc_tcnt); } void gtsc_dmastop(struct sbic_softc *dev) { volatile struct sdmac *sdp; int s; sdp = dev->sc_cregs; #ifdef DEBUG if (gtsc_debug & DDB_FOLLOW) printf("gtsc_dmastop()\n"); #endif if (dev->sc_dmacmd) { /* * clear possible interrupt and stop DMA */ s = splbio(); sdp->CNTR &= ~GVP_CNTR_INT_P; amiga_membarrier(); sdp->SP_DMA = 1; amiga_membarrier(); dev->sc_dmacmd = 0; splx(s); } } int gtsc_dmaintr(void *arg) { struct sbic_softc *dev = arg; volatile struct sdmac *sdp; int stat; sdp = dev->sc_cregs; stat = sdp->CNTR; amiga_membarrier(); if ((stat & GVP_CNTR_INT_P) == 0) return (0); #ifdef DEBUG if (gtsc_debug & DDB_FOLLOW) printf("%s: dmaintr 0x%x\n", device_xname(dev->sc_dev), stat); #endif if (dev->sc_flags & SBICF_INTR) if (sbicintr(dev)) return (1); return(0); } int gtsc_dmanext(struct sbic_softc *dev) { volatile struct sdmac *sdp; sdp = dev->sc_cregs; if (dev->sc_cur > dev->sc_last) { /* shouldn't happen !! */ printf("gtsc_dmanext at end !!!\n"); gtsc_dmastop(dev); return(0); } /* * clear possible interrupt and stop DMA */ sdp->CNTR &= ~GVP_CNTR_INT_P; amiga_membarrier(); sdp->SP_DMA = 1; amiga_membarrier(); sdp->CNTR = dev->sc_dmacmd; amiga_membarrier(); sdp->ACR = (u_int) dev->sc_cur->dc_addr; amiga_membarrier(); if (dev->gtsc_bankmask) { sdp->bank = dev->gtsc_bankmask & ((u_int)dev->sc_cur->dc_addr >> 18); amiga_membarrier(); } sdp->ST_DMA = 1; amiga_membarrier(); 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) printf("gtsc_dmanext ret: %ld\n", dev->sc_tcnt); #endif return(dev->sc_tcnt); } #ifdef DEBUG void gtsc_dump(void) { extern struct cfdriver gtsc_cd; struct sbic_softc *sc; int i; for (i = 0; i < gtsc_cd.cd_ndevs; ++i) { sc = device_lookup_private(>sc_cd, i); if (sc != NULL) sbic_dump(sc); } } #endif