241 lines
7.2 KiB
C
241 lines
7.2 KiB
C
/* $NetBSD: sc_vme.c,v 1.18 2019/11/10 21:16:38 chs Exp $ */
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/*-
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* Copyright (c) 1996,2000,2001 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, Jason R. Thorpe,
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* Paul Kranenburg, and Matt 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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*
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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 VME bus-dependent of the `sc' SCSI adapter.
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* This hardware is frequently found on Sun 2, Sun 3, and Sun 4 machines.
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*
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* The SCSI machinery on this adapter is implemented by an Sun custom
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* chipset, which is handled by the chipset driver in /sys/dev/ic/sunscpal.c
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*/
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/*
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* This driver originated as an MD implementation for the `si' VME driver.
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* The notes pertaining to that history are included below.
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*
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* David Jones wrote the initial version of this module for NetBSD/sun3,
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* which included support for the VME adapter only. (no reselection).
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*
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* Gordon Ross added support for the Sun 3 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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* Jason R. Thorpe ported the autoconfiguration and VME portions to
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* NetBSD/sparc, and added initial support for the 4/100 "SCSI Weird",
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* a wacky OBIO variant of the VME SCSI-3. Many thanks to Chuck Cranor
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* for lots of helpful tips and suggestions. Thanks also to Paul Kranenburg
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* and Chris Torek for bits of insight needed along the way. Thanks to
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* David Gilbert and Andrew Gillham who risked filesystem life-and-limb
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* for the sake of testing. Andrew Gillham helped work out the bugs
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* the 4/100 DMA code.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: sc_vme.c,v 1.18 2019/11/10 21:16:38 chs Exp $");
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#include "opt_ddb.h"
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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/malloc.h>
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#include <sys/errno.h>
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#include <sys/device.h>
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#include <sys/buf.h>
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#include <sys/bus.h>
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#include <sys/intr.h>
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#include <dev/vme/vmereg.h>
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#include <dev/vme/vmevar.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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#if !defined(DDB) && !defined(Debugger)
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#define Debugger()
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#endif
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#ifndef DEBUG
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#define DEBUG XXX
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#endif
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#include <dev/ic/sunscpalvar.h>
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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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int sunsc_vme_options = 0;
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static int sc_vme_match(device_t, cfdata_t, void *);
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static void sc_vme_attach(device_t, device_t, void *);
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static int sc_vme_intr(void *);
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/* Auto-configuration glue. */
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CFATTACH_DECL_NEW(sc_vme, sizeof(struct sunscpal_softc),
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sc_vme_match, sc_vme_attach, NULL, NULL);
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static int
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sc_vme_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct vme_attach_args *va = aux;
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vme_chipset_tag_t ct = va->va_vct;
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vme_am_t mod;
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vme_addr_t vme_addr;
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/* Make sure there is something there... */
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mod = VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA;
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vme_addr = va->r[0].offset;
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if (vme_probe(ct, vme_addr, 1, mod, VME_D8, NULL, 0) != 0)
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return 0;
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/*
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* If this is a VME SCSI board, we have to determine whether
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* it is an "sc" (Sun2) or "si" (Sun3) SCSI board. This can
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* be determined using the fact that the "sc" board occupies
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* 4K bytes in VME space but the "si" board occupies 2K bytes.
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*/
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return vme_probe(ct, vme_addr + 0x801, 1, mod, VME_D8, NULL, 0) == 0;
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}
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static void
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sc_vme_attach(device_t parent, device_t self, void *aux)
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{
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struct sunscpal_softc *sc = device_private(self);
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struct vme_attach_args *va = aux;
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vme_chipset_tag_t ct = va->va_vct;
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bus_space_tag_t bt;
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bus_space_handle_t bh;
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vme_mapresc_t resc;
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vme_intr_handle_t ih;
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vme_am_t mod;
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int i;
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sc->sc_dev = self;
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sc->sunscpal_dmat = va->va_bdt;
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mod = VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA;
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if (vme_space_map(ct, va->r[0].offset, SCREG_BANK_SZ,
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mod, VME_D8, 0, &bt, &bh, &resc) != 0)
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panic("%s: vme_space_map", device_xname(self));
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sc->sunscpal_regt = bt;
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sc->sunscpal_regh = bh;
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vme_intr_map(ct, va->ilevel, va->ivector, &ih);
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vme_intr_establish(ct, ih, IPL_BIO, sc_vme_intr, sc);
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aprint_normal("\n");
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/*
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* Initialize fields used by the MI code
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*/
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/* PAL register bank 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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/* Miscellaneous. */
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sc->sc_min_dma_len = MIN_DMA_LEN;
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sc->sc_rev = SUNSCPAL_VARIANT_501_1045;
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/*
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* Allocate DMA handles.
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*/
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i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle);
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sc->sc_dma_handles = malloc(i, M_DEVBUF, M_WAITOK);
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for (i = 0; i < SUNSCPAL_OPENINGS; i++) {
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sc->sc_dma_handles[i].dh_flags = 0;
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/* Allocate a DMA handle */
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if (vme_dmamap_create(
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ct, /* VME chip tag */
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SUNSCPAL_MAX_DMA_LEN, /* size */
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VME_AM_A24, /* address modifier */
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VME_D16, /* data size */
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0, /* swap */
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1, /* nsegments */
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SUNSCPAL_MAX_DMA_LEN, /* maxsegsz */
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0, /* boundary */
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BUS_DMA_NOWAIT,
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&sc->sc_dma_handles[i].dh_dmamap) != 0) {
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aprint_error_dev(self, "DMA buffer map create error\n");
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return;
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}
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}
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/*
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* Set up interrupts on the board.
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*/
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SUNSCPAL_WRITE_1(sc, sunscpal_intvec, va->ivector & 0xFF);
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/* Do the common attach stuff. */
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printf("%s", device_xname(self));
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sunscpal_attach(sc, (device_cfdata(self)->cf_flags ?
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device_cfdata(self)->cf_flags : sunsc_vme_options));
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}
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static int
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sc_vme_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("%s: spurious from SBC\n", __func__);
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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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