295 lines
7.7 KiB
C
295 lines
7.7 KiB
C
/* $NetBSD: wdsc.c,v 1.6 2001/11/21 23:22:25 thorpej Exp $ */
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/*
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* Copyright (c) 2001 Wayne Knowles
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Wayne Knowles
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/buf.h>
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#include <dev/scsipi/scsi_all.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsiconf.h>
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#include <machine/cpu.h>
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#include <machine/bus.h>
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#include <machine/autoconf.h>
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#include <sgimips/hpc/hpcvar.h>
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#include <sgimips/hpc/hpcreg.h>
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#include <sgimips/hpc/hpcdma.h>
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#include <sgimips/hpc/sbicreg.h>
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#include <sgimips/hpc/sbicvar.h>
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#include <opt_kgdb.h>
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#include <sys/kgdb.h>
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struct wdsc_softc {
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struct wd33c93_softc sc_wd33c93; /* Must be first */
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struct evcnt sc_intrcnt; /* Interrupt counter */
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bus_dma_tag_t sc_dmat;
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bus_dmamap_t sc_dmamap;
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int sc_flags;
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#define WDSC_DMA_ACTIVE 0x1
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#define WDSC_DMA_MAPLOADED 0x2
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struct hpc_dma_softc sc_hpcdma;
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};
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void wdsc_attach __P((struct device *, struct device *, void *));
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int wdsc_match __P((struct device *, struct cfdata *, void *));
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struct cfattach wdsc_ca = {
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sizeof(struct wdsc_softc), wdsc_match, wdsc_attach
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};
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int wdsc_dmasetup __P((struct wd33c93_softc *, caddr_t *,size_t *,
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int, size_t *));
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int wdsc_dmago __P((struct wd33c93_softc *));
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void wdsc_dmastop __P((struct wd33c93_softc *));
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void wdsc_reset __P((struct wd33c93_softc *));
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int wdsc_dmaintr __P((void *));
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int wdsc_scsiintr __P((void *));
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#define MAX_SCSI_XFER (512*1024)
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#define MAX_SEG_SZ 8192
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#define MAX_DMA_SZ MAX_SCSI_XFER
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#define DMA_SEGS (MAX_DMA_SZ/MAX_SEG_SZ)
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/*
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* Match for SCSI devices on the onboard WD33C93 chip
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*/
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int
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wdsc_match(pdp, cf, auxp)
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struct device *pdp;
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struct cfdata *cf;
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void *auxp;
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{
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struct hpc_attach_args *haa = auxp;
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if (strcmp(haa->ha_name, cf->cf_driver->cd_name) == 0)
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return (1);
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return (0);
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}
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/*
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* Attach the wdsc driver
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*/
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void
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wdsc_attach(pdp, dp, auxp)
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struct device *pdp, *dp;
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void *auxp;
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{
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struct wd33c93_softc *sc = (void *)dp;
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struct wdsc_softc *wsc = (void *)dp;
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struct hpc_attach_args *haa = auxp;
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int err;
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sc->sc_regt = haa->ha_st;
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wsc->sc_dmat = haa->ha_dmat;
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if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh,
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haa->ha_devoff,
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HPC_SCSI0_DEVREGS_SIZE,
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&sc->sc_regh)) != 0) {
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printf(": unable to map regs, err=%d\n", err);
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return;
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}
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if (bus_dmamap_create(wsc->sc_dmat, MAX_DMA_SZ,
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DMA_SEGS, MAX_SEG_SZ, MAX_SEG_SZ,
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BUS_DMA_WAITOK,
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&wsc->sc_dmamap) != 0) {
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printf(": failed to create dmamap\n");
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return;
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}
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sc->sc_dmasetup = wdsc_dmasetup;
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sc->sc_dmago = wdsc_dmago;
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sc->sc_dmastop = wdsc_dmastop;
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sc->sc_reset = wdsc_reset;
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sc->sc_adapter.adapt_request = wd33c93_scsi_request;
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sc->sc_adapter.adapt_minphys = minphys;
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sc->sc_id = 7; /* Host ID = 7 */
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sc->sc_clkfreq = 200; /* 20MHz Clock */
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evcnt_attach_dynamic(&wsc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
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sc->sc_dev.dv_xname, "intr");
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if ((cpu_intr_establish(haa->ha_irq, IPL_BIO,
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wdsc_scsiintr, sc)) == NULL) {
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printf(": unable to establish interrupt!\n");
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return;
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}
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hpcdma_init(haa, &wsc->sc_hpcdma, DMA_SEGS);
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wd33c93_attach(sc);
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return;
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}
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/*
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* Prime the hardware for a DMA transfer
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*
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* Requires splbio() interrupts to be disabled by the caller
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*/
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int
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wdsc_dmasetup(dev, addr, len, datain, dmasize)
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struct wd33c93_softc *dev;
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caddr_t *addr;
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size_t *len;
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int datain;
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size_t *dmasize;
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{
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struct wdsc_softc *wsc = (void *)dev;
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struct hpc_dma_softc *dsc = &wsc->sc_hpcdma;
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int count, err;
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void *vaddr;
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KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0);
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vaddr = *addr;
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count = dsc->sc_dlen = *len;
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if (count) {
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KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED) == 0);
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/* Build list of physical addresses for this transfer */
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if ((err=bus_dmamap_load(wsc->sc_dmat, wsc->sc_dmamap,
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vaddr, count,
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NULL /* kernel address */,
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BUS_DMA_NOWAIT)) != 0)
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panic("%s: bus_dmamap_load err=%d",
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dev->sc_dev.dv_xname, err);
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hpcdma_sglist_create(dsc, wsc->sc_dmamap);
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wsc->sc_flags |= WDSC_DMA_MAPLOADED;
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if (datain) {
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dsc->sc_dmacmd = HPC_DMACTL_ACTIVE;
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dsc->sc_flags |= HPCDMA_READ;
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} else {
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dsc->sc_dmacmd = HPC_DMACTL_ACTIVE | HPC_DMACTL_DIR;
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dsc->sc_flags &= ~HPCDMA_READ;
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}
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}
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return(count);
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}
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/*
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* Prime the hardware for the next DMA transfer
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*/
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int
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wdsc_dmago(dev)
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struct wd33c93_softc *dev;
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{
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struct wdsc_softc *wsc = (void *)dev;
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struct hpc_dma_softc *dsc = &wsc->sc_hpcdma;
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if (dsc->sc_dlen == 0)
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return(0);
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KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0);
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KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED));
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wsc->sc_flags |= WDSC_DMA_ACTIVE;
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bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0,
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wsc->sc_dmamap->dm_mapsize,
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BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
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hpcdma_cntl(dsc, dsc->sc_dmacmd); /* Thunderbirds are go! */
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return(wsc->sc_dmamap->dm_mapsize);
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}
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/*
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* Stop DMA and unload active DMA maps
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*/
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void
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wdsc_dmastop(dev)
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struct wd33c93_softc *dev;
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{
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struct wdsc_softc *wsc = (void *)dev;
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struct hpc_dma_softc *dsc = &wsc->sc_hpcdma;
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if (wsc->sc_flags & WDSC_DMA_ACTIVE) {
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if (dsc->sc_flags & HPCDMA_READ)
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hpcdma_flush(dsc);
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hpcdma_cntl(dsc, 0); /* Stop DMA */
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bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0,
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wsc->sc_dmamap->dm_mapsize,
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BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
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}
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if (wsc->sc_flags & WDSC_DMA_MAPLOADED)
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bus_dmamap_unload(wsc->sc_dmat, wsc->sc_dmamap);
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wsc->sc_flags &= ~(WDSC_DMA_ACTIVE | WDSC_DMA_MAPLOADED);
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}
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/*
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* Reset the controller.
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*/
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void
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wdsc_reset(dev)
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struct wd33c93_softc *dev;
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{
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struct wdsc_softc *wsc = (void *)dev;
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struct hpc_dma_softc *dsc = &wsc->sc_hpcdma;
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hpcdma_reset(dsc);
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}
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/*
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* WD33c93 SCSI controller interrupt
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*/
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int
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wdsc_scsiintr(arg)
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void *arg;
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{
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struct wd33c93_softc *dev = arg;
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struct wdsc_softc *wsc = arg;
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int found;
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found = wd33c93_intr(dev);
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if (found)
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wsc->sc_intrcnt.ev_count++;
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return(found);
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}
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