/* $NetBSD: asc.c,v 1.25 1998/12/05 19:43:40 mjacob Exp $ */ /* * Copyright (c) 1996 Mark Brinicombe * 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. * * from:ahsc.c */ /* * Driver for the Acorn SCSI card using the SBIC (WD3393) generic driver * * Thanks to Acorn for supplying programming information on this card. */ /* * Ok this driver is not wonderful yet. It only supports POLLING mode * The Acorn SCSI card (or any WD3393 based card) does not support * DMA so the DMA section of this driver and the sbic driver needs * to be rewritten. */ #include "opt_ddb.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include void ascattach __P((struct device *, struct device *, void *)); int ascmatch __P((struct device *, struct cfdata *, void *)); void asc_enintr __P((struct sbic_softc *)); void asc_dmastop __P((struct sbic_softc *)); int asc_dmanext __P((struct sbic_softc *)); int asc_dmaintr __P((struct sbic_softc *)); int asc_dmago __P((struct sbic_softc *, char *, int, int)); int asc_scsicmd __P((struct scsipi_xfer *xs)); int asc_intr __P((void *arg)); void asc_minphys __P((struct buf *bp)); struct scsipi_device asc_scsidev = { NULL, /* use default error handler */ NULL, /* do not have a start functio */ NULL, /* have no async handler */ NULL, /* Use default done routine */ }; #ifdef DEBUG int asc_dmadebug = 0; #endif struct cfattach asc_ca = { sizeof(struct asc_softc), ascmatch, ascattach }; extern struct cfdriver asc_cd; u_long scsi_nosync; int shift_nosync; #if ASC_POLL > 0 int asc_poll = 0; #endif int ascmatch(pdp, cf, auxp) struct device *pdp; struct cfdata *cf; void *auxp; { struct podule_attach_args *pa = (struct podule_attach_args *)auxp; /* Look for the card */ if (matchpodule(pa, MANUFACTURER_ACORN, PODULE_ACORN_SCSI, -1) == 0) return(0); if (strncmp(pa->pa_podule->description, "MCS", 3) == 0) return(0); return(1); } void ascattach(pdp, dp, auxp) struct device *pdp, *dp; void *auxp; { /* volatile struct sdmac *rp;*/ struct asc_softc *sc; struct sbic_softc *sbic; struct podule_attach_args *pa; sc = (struct asc_softc *)dp; pa = (struct podule_attach_args *)auxp; if (pa->pa_podule_number == -1) panic("Podule has disappeared !"); sc->sc_podule_number = pa->pa_podule_number; sc->sc_podule = pa->pa_podule; podules[sc->sc_podule_number].attached = 1; sbic = &sc->sc_softc; sbic->sc_enintr = asc_enintr; sbic->sc_dmago = asc_dmago; sbic->sc_dmanext = asc_dmanext; sbic->sc_dmastop = asc_dmastop; sbic->sc_dmacmd = 0; /* * eveything is a valid dma address */ sbic->sc_dmamask = 0; sbic->sc_sbicp = (sbic_regmap_p) (sc->sc_podule->mod_base + ASC_SBIC); sbic->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143; sbic->sc_adapter.scsipi_cmd = asc_scsicmd; sbic->sc_adapter.scsipi_minphys = asc_minphys; sbic->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE; sbic->sc_link.adapter_softc = sbic; sbic->sc_link.scsipi_scsi.adapter_target = 7; sbic->sc_link.adapter = &sbic->sc_adapter; sbic->sc_link.device = &asc_scsidev; sbic->sc_link.openings = 1; /* was 2 */ sbic->sc_link.scsipi_scsi.max_target = 7; sbic->sc_link.scsipi_scsi.max_lun = 7; sbic->sc_link.type = BUS_SCSI; /* Provide an override for the host id */ (void)get_bootconf_option(boot_args, "asc.hostid", BOOTOPT_TYPE_INT, &sbic->sc_link.scsipi_scsi.adapter_target); printf(" hostid=%d", sbic->sc_link.scsipi_scsi.adapter_target); #if ASC_POLL > 0 if (boot_args) { char *ptr; ptr = strstr(boot_args, "ascpoll"); if (ptr) asc_poll = 1; } if (asc_poll) printf(" polling"); #endif printf("\n"); sc->sc_pagereg = sc->sc_podule->fast_base + ASC_PAGEREG; sc->sc_intstat = sc->sc_podule->fast_base + ASC_INTSTATUS; /* Reset the card */ WriteByte(sc->sc_pagereg, 0x80); DELAY(500000); WriteByte(sc->sc_pagereg, 0x00); DELAY(250000); sbicinit(sbic); /* If we are polling only then we don't need a interrupt handler */ sc->sc_ih.ih_func = asc_intr; sc->sc_ih.ih_arg = sc; sc->sc_ih.ih_level = IPL_BIO; sc->sc_ih.ih_name = "scsi: asc"; sc->sc_ih.ih_maskaddr = sc->sc_podule->irq_addr; sc->sc_ih.ih_maskbits = sc->sc_podule->irq_mask; #ifdef ASC_POLL if (!asc_poll) #endif if (irq_claim(sc->sc_podule->interrupt, &sc->sc_ih)) panic("%s: Cannot claim podule IRQ\n", dp->dv_xname); /* * attach all scsi units on us */ config_found(dp, &sbic->sc_link, scsiprint); } void asc_enintr(sbicsc) struct sbic_softc *sbicsc; { struct asc_softc *sc = (struct asc_softc *)sbicsc; /* printf("asc_enintr\n");*/ /* volatile struct sdmac *sdp; sdp = dev->sc_cregs; dev->sc_flags |= SBICF_INTR; sdp->CNTR = CNTR_PDMD | CNTR_INTEN; */ sbicsc->sc_flags |= SBICF_INTR; WriteByte(sc->sc_pagereg, 0x40); } int asc_dmago(dev, addr, count, flags) struct sbic_softc *dev; char *addr; int count, flags; { printf("asc_dmago(addr=%p, count=%d,flags=%d)\n", addr, count, flags); printf("dmago: dc_addr=%p tcnt=%lx\n", dev->sc_cur->dc_addr, dev->sc_tcnt); #ifdef DDB Debugger(); #else panic("Hit a brick wall\n"); #endif #if 0 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); #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); #endif return(0); } void asc_dmastop(dev) struct sbic_softc *dev; { /* printf("asc_dmastop\n");*/ #if 0 volatile struct sdmac *sdp; int s; sdp = dev->sc_cregs; #ifdef DEBUG if (ahsc_dmadebug & DDB_FOLLOW) printf("ahsc_dmastop()\n"); #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); } #endif } int asc_dmaintr(dev) struct sbic_softc *dev; { panic("asc_dmaintr"); #if 0 volatile struct sdmac *sdp; int stat, found; sdp = dev->sc_cregs; stat = sdp->ISTR; if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0) return (0); #ifdef DEBUG if (ahsc_dmadebug & DDB_FOLLOW) printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat); #endif /* * both, SCSI and DMA interrupts arrive here. I chose * arbitrarily that DMA interrupts should have higher * precedence than SCSI interrupts. */ found = 0; 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); #endif return(0); } int asc_dmanext(dev) struct sbic_softc *dev; { printf("asc_dmanext\n"); #ifdef DDB Debugger(); #else panic("Hit a brick wall\n"); #endif #if 0 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"); asc_dmastop(dev); return(0); } 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); #endif return(0); } void asc_dump() { int i; for (i = 0; i < asc_cd.cd_ndevs; ++i) if (asc_cd.cd_devs[i]) sbic_dump(asc_cd.cd_devs[i]); } int asc_scsicmd(xs) struct scsipi_xfer *xs; { /* struct scsipi_link *sc_link = xs->sc_link;*/ /* ensure command is polling for the moment */ #if ASC_POLL > 0 if (asc_poll) xs->flags |= SCSI_POLL; #endif /* printf("id=%d lun=%dcmdlen=%d datalen=%d opcode=%02x flags=%08x status=%02x blk=%02x %02x\n", sc_link->scsipi_scsi.target, sc_link->scsipi_scsi.lun, xs->cmdlen, xs->datalen, xs->cmd->opcode, xs->flags, xs->status, xs->cmd->bytes[0], xs->cmd->bytes[1]);*/ return(sbic_scsicmd(xs)); } int asc_intr(arg) void *arg; { struct asc_softc *sc = arg; int intr; /* printf("ascintr:");*/ intr = ReadByte(sc->sc_intstat); /* printf("%02x\n", intr);*/ if (intr & IS_SBIC_IRQ) sbicintr((struct sbic_softc *)sc); return(0); /* Pass interrupt on down the chain */ } int kvtop() { printf("kvtop\n"); #ifdef DDB Debugger(); #else panic("Hit a brick wall\n"); #endif return(0); } void alloc_z2mem() { panic("allocz2mem"); } void isztwomem() { panic("isz2mem"); } void PREP_DMA_MEM() { panic("PREP_DMA_MEM"); } /* * limit the transfer as required. */ void asc_minphys(bp) struct buf *bp; { #if 0 /* * We must limit the DMA xfer size */ if (bp->b_bcount > MAX_DMA_LEN) { printf("asc: Reducing dma length\n"); bp->b_bcount = MAX_DMA_LEN; } #endif minphys(bp); }