/* $NetBSD: wdsc.c,v 1.3 1996/05/29 04:29:46 chuck Exp $ */ /* * Copyright (c) 1996 Steve Woodford * 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. * * @(#)wdsc.c */ #include #include #include #include #include #include #include #include #include #include #include #include #include int wdscprint __P((void *auxp, char *)); void wdsc_pcc_attach __P((struct device *, struct device *, void *)); int wdsc_pcc_match __P((struct device *, void *, void *)); void wdsc_enintr __P((struct sbic_softc *)); int wdsc_dmago __P((struct sbic_softc *, char *, int, int)); int wdsc_dmanext __P((struct sbic_softc *)); void wdsc_dmastop __P((struct sbic_softc *)); int wdsc_dmaintr __P((void *)); int wdsc_scsiintr __P((void *)); struct scsi_adapter wdsc_scsiswitch = { sbic_scsicmd, sbic_minphys, 0, /* no lun support */ 0, /* no lun support */ }; struct scsi_device wdsc_scsidev = { NULL, /* use default error handler */ NULL, /* do not have a start functio */ NULL, /* have no async handler */ NULL, /* Use default done routine */ }; struct cfattach wdsc_pcc_ca = { sizeof(struct sbic_softc), wdsc_pcc_match, wdsc_pcc_attach }; struct cfdriver wdsc_cd = { NULL, "wdsc", DV_DULL, NULL, 0 }; /* * Define 'scsi_nosync = 0x00' to enable sync SCSI mode. * This is untested as yet, use at your own risk... */ u_long scsi_nosync = 0xff; int shift_nosync = 0; /* * Match for SCSI devices on the onboard WD33C93 chip */ int wdsc_pcc_match(pdp, match, auxp) struct device *pdp; void *match, *auxp; { struct cfdata *cf = match; struct pcc_attach_args *pa = auxp; if (strcmp(pa->pa_name, wdsc_cd.cd_name)) return (0); pa->pa_ipl = cf->pcccf_ipl; return (1); } /* * Attach the wdsc driver */ void wdsc_pcc_attach(pdp, dp, auxp) struct device *pdp, *dp; void *auxp; { struct sbic_softc *sc = (struct sbic_softc *)dp; struct pcc_attach_args *pa = auxp; static int attached = 0; int tmp; if ( attached ) panic("wdsc: Driver already attached!"); attached = 1; sc->sc_enintr = wdsc_enintr; sc->sc_dmago = wdsc_dmago; sc->sc_dmanext = wdsc_dmanext; sc->sc_dmastop = wdsc_dmastop; sc->sc_dmacmd = 0; sc->sc_link.adapter_softc = sc; sc->sc_link.adapter_target = 7; sc->sc_link.adapter = &wdsc_scsiswitch; sc->sc_link.device = &wdsc_scsidev; sc->sc_link.openings = 2; printf(": WD33C93 SCSI, target %d\n", sc->sc_link.adapter_target); sc->sc_cregs = (volatile void *)sys_pcc; sc->sc_sbicp = (sbic_regmap_p) PCC_VADDR(pa->pa_offset); /* * Eveything is a valid dma address. */ sc->sc_dmamask = 0; /* * The onboard WD33C93 of the '147 is usually clocked at 10MHz... * (We use 10 times this for accuracy in later calculations) */ sc->sc_clkfreq = 100; /* * Initialise the hardware */ sbicinit(sc); /* * Fix up the interrupts */ sc->sc_ipl = pa->pa_ipl & PCC_IMASK; sys_pcc->scsi_int = sc->sc_ipl | PCC_ICLEAR; sys_pcc->dma_int = sc->sc_ipl | PCC_ICLEAR; sys_pcc->dma_csr = 0; pccintr_establish(PCCV_SCSID, wdsc_dmaintr, sc->sc_ipl, sc); pccintr_establish(PCCV_SCSIP, wdsc_scsiintr, sc->sc_ipl, sc); sys_pcc->scsi_int = sc->sc_ipl | PCC_IENABLE | PCC_ICLEAR; /* * Attach all scsi units on us, watching for boot device * (see dk_establish). */ tmp = bootpart; if (PCC_PADDR(pa->pa_offset) != bootaddr) bootpart = -1; /* invalid flag to dk_establish */ (void)config_found(dp, &sc->sc_link, wdscprint); bootpart = tmp; /* restore old value */ } /* * print diag if pnp is NULL else just extra */ int wdscprint(auxp, pnp) void *auxp; char *pnp; { /* Only scsibusses can attach to wdscs...easy. */ if (pnp) printf("scsibus at %s", pnp); return (UNCONF); } /* * Enable DMA interrupts */ void wdsc_enintr(dev) struct sbic_softc *dev; { volatile struct pcc *pc = dev->sc_cregs; dev->sc_flags |= SBICF_INTR; pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; } /* * Prime the hardware for a DMA transfer */ int wdsc_dmago(dev, addr, count, flags) struct sbic_softc *dev; char *addr; int count, flags; { volatile struct pcc *pc = dev->sc_cregs; /* * Set up the command word based on flags */ if ( (flags & DMAGO_READ) == 0 ) dev->sc_dmacmd = DMAC_CSR_ENABLE | DMAC_CSR_WRITE; else dev->sc_dmacmd = DMAC_CSR_ENABLE; dev->sc_flags |= SBICF_INTR; dev->sc_tcnt = dev->sc_cur->dc_count << 1; /* * Prime the hardware. * Note, it's probably not necessary to do this here, since dmanext * is called just prior to the actual transfer. */ pc->dma_csr = 0; pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; pc->dma_daddr = (unsigned long)dev->sc_cur->dc_addr; pc->dma_bcnt = (unsigned long)dev->sc_tcnt | (1 << 24); pc->dma_csr = dev->sc_dmacmd; return(dev->sc_tcnt); } /* * Prime the hardware for the next DMA transfer */ int wdsc_dmanext(dev) struct sbic_softc *dev; { volatile struct pcc *pc = dev->sc_cregs; if ( dev->sc_cur > dev->sc_last ) { /* * Shouldn't happen !! */ printf("wdsc_dmanext at end !!!\n"); wdsc_dmastop(dev); return(0); } dev->sc_tcnt = dev->sc_cur->dc_count << 1; /* * Load the next DMA address */ pc->dma_csr = 0; pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; pc->dma_daddr = (unsigned long)dev->sc_cur->dc_addr; pc->dma_bcnt = (unsigned long)dev->sc_tcnt | (1 << 24); pc->dma_csr = dev->sc_dmacmd; return(dev->sc_tcnt); } /* * Stop DMA, and disable interrupts */ void wdsc_dmastop(dev) struct sbic_softc *dev; { volatile struct pcc *pc = dev->sc_cregs; int s; s = splbio(); pc->dma_csr = 0; pc->dma_int = dev->sc_ipl | PCC_ICLEAR; splx(s); } /* * Come here following a DMA interrupt */ int wdsc_dmaintr(arg) void *arg; { struct sbic_softc *dev = arg; volatile struct pcc *pc = dev->sc_cregs; int found = 0; /* * Really a DMA interrupt? */ if ( (pc->dma_int & 0x80) == 0 ) return(0); /* * Was it a completion interrupt? * XXXSCW Note: Support for other DMA interrupts is required, eg. buserr */ if ( pc->dma_csr & DMAC_CSR_DONE ) { ++found; pc->dma_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; } return(found); } /* * Come here for SCSI interrupts */ int wdsc_scsiintr(arg) void *arg; { struct sbic_softc *dev = arg; volatile struct pcc *pc = dev->sc_cregs; int found; /* * Really a SCSI interrupt? */ if ( (pc->scsi_int & 0x80) == 0 ) return(0); /* * Go handle it */ found = sbicintr(dev); /* * Acknowledge and clear the interrupt */ pc->scsi_int = dev->sc_ipl | PCC_IENABLE | PCC_ICLEAR; return(found); }