215 lines
6.6 KiB
C
215 lines
6.6 KiB
C
/* $NetBSD: sc_mbmem.c,v 1.2 2001/06/27 17:37:04 fredette Exp $ */
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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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 Adam Glass, David Jones, Gordon W. Ross, and Matthew Fredette.
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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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/*
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* This file contains only the machine-dependent parts of the
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* Sun-2 SCSI driver. (Autoconfig stuff and DMA functions.)
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* The machine-independent parts are in sunscpal.c
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*
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* Supported hardware includes:
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* Sun SCSI-2 on Multibus (Sun2/120,Sun2/170)
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* Sun SCSI-2 on VME (Sun2/50,Sun3/160,Sun3/260,others?)
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*
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* Credits, history:
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*
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* Matthew Fredette took revision 1.15 of si_vme.c, and then heavily
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* modified it to support the Sun sc. The remaining credits
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* are from si_vme.c:
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*
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* David Jones wrote the initial version of this module, which
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* included support for the VME adapter only. (no reselection).
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*
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* Gordon Ross added support for the OBIO adapter, and re-worked
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* both the VME and OBIO code to support disconnect/reselect.
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* (Required figuring out the hardware "features" noted above.)
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*
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* The autoconfiguration boilerplate came from Adam Glass.
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*/
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/*****************************************************************
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* Multibus functions for sc
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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/errno.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/user.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/scsipi_debug.h>
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#include <dev/scsipi/scsiconf.h>
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#include <machine/autoconf.h>
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#include <machine/bus.h>
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/* #define DEBUG XXX */
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#include <dev/ic/sunscpalreg.h>
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#include <dev/ic/sunscpalvar.h>
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/* Yes, we use a VME header file. */
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#include <dev/vme/screg.h>
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/*
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* Transfers smaller than this are done using PIO
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* (on assumption they're not worth DMA overhead)
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*/
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#define MIN_DMA_LEN 128
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/*
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* New-style autoconfig attachment
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*/
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static int sunsc_mbmem_match __P((struct device *, struct cfdata *, void *));
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static void sunsc_mbmem_attach __P((struct device *, struct device *, void *));
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static int sunsc_mbmem_intr __P((void *));
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struct cfattach sc_mbmem_ca = {
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sizeof(struct sunscpal_softc), sunsc_mbmem_match, sunsc_mbmem_attach
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};
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/*
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* Options for parity, DMA, and interrupts.
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*/
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int sunsc_mbmem_options = 0x00;
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static int
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sunsc_mbmem_match(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct mbmem_attach_args *mbma = aux;
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bus_space_handle_t bh;
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int matched;
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/* No default Multibus address. */
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if (mbma->mbma_paddr == -1)
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return (0);
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/* Make sure there is something there... */
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if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ,
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0, &bh))
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return (0);
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matched = (bus_space_peek_2(mbma->mbma_bustag, bh, SCREG_ICR, NULL) == 0);
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bus_space_unmap(mbma->mbma_bustag, bh, SCREG_BANK_SZ);
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if (!matched)
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return (0);
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/* Default interrupt priority. */
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if (mbma->mbma_pri == -1)
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mbma->mbma_pri = 2;
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return (1);
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}
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static void
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sunsc_mbmem_attach(parent, self, args)
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struct device *parent, *self;
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void *args;
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{
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struct sunscpal_softc *sc = (void *) self;
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struct cfdata *cf = self->dv_cfdata;
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struct mbmem_attach_args *mbma = args;
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int i;
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/* Map in the device. */
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sc->sunscpal_regt = mbma->mbma_bustag;
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sc->sunscpal_dmat = mbma->mbma_dmatag;
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if (bus_space_map(mbma->mbma_bustag, mbma->mbma_paddr, SCREG_BANK_SZ,
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0, &sc->sunscpal_regh))
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panic("sunsc_mbmem_attach: can't map");
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/* Device register offsets. */
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sc->sunscpal_data = SCREG_DATA;
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sc->sunscpal_cmd_stat = SCREG_CMD_STAT;
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sc->sunscpal_icr = SCREG_ICR;
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sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H;
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sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L;
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sc->sunscpal_dma_count = SCREG_DMA_COUNT;
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sc->sunscpal_intvec = SCREG_INTVEC;
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/* Allocate DMA handles. */
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i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle);
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sc->sc_dma_handles = (sunscpal_dma_handle_t)
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malloc(i, M_DEVBUF, M_WAITOK);
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if (sc->sc_dma_handles == NULL)
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panic("sc: dma handles malloc failed\n");
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for (i = 0; i < SUNSCPAL_OPENINGS; i++)
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if (bus_dmamap_create(sc->sunscpal_dmat, SUNSCPAL_MAX_DMA_LEN,
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1, SUNSCPAL_MAX_DMA_LEN,
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0, BUS_DMA_WAITOK, &sc->sc_dma_handles[i].
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dh_dmamap) != 0)
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panic("sc: dma map create failed\n");
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/* Miscellaneous. */
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sc->sc_min_dma_len = MIN_DMA_LEN;
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sc->sc_rev = SUNSCPAL_VARIANT_501_1006;
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/* Attach interrupt handler. */
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bus_intr_establish(mbma->mbma_bustag, mbma->mbma_pri, IPL_BIO, 0,
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sunsc_mbmem_intr, sc);
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/* Do the common attach stuff. */
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sunscpal_attach(sc, (cf->cf_flags ? cf->cf_flags : sunsc_mbmem_options));
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}
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static int
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sunsc_mbmem_intr(void *arg)
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{
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struct sunscpal_softc *sc = arg;
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int claimed;
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claimed = sunscpal_intr(sc);
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#ifdef DEBUG
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if (!claimed) {
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printf("sunsc_intr: spurious from SBC\n");
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}
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#endif
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/* Yes, we DID cause this interrupt. */
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claimed = 1;
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return (claimed);
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}
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