341 lines
8.5 KiB
C
341 lines
8.5 KiB
C
/*-
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* Copyright (c) 1999 Matthew N. Dodd <winter@jurai.net>
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Written using the bt_isa/bt_pci code as a reference.
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*
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* Thanks to Andy Farkas <andyf@speednet.com.au> for
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* testing and feedback.
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*/
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#include <sys/types.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/lock.h>
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#include <sys/mutex.h>
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#include <machine/cpufunc.h>
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#include <machine/md_var.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <dev/mca/mca_busreg.h>
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#include <dev/mca/mca_busvar.h>
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#include <i386/isa/isa_dma.h>
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#include <dev/buslogic/btreg.h>
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#include <cam/scsi/scsi_all.h>
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static struct mca_ident bt_mca_devs[] = {
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{ 0x0708, "BusLogic 32 Bit Bus Master MCA-to-SCSI Host Adapter" },
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{ 0x0708, "BusTek BT-640A Micro Channel to SCSI Host Adapter" },
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{ 0x0708, "Storage Dimensions SDC3211B 32-bit SCSI Host Adapter" },
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{ 0x0709, "Storage Dimensions SDC3211F 32-bit FAST SCSI Host Adapter" },
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{ 0, NULL },
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};
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#define BT_MCA_IOPORT_POS1 MCA_ADP_POS(MCA_POS0)
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#define BT_MCA_IOPORT_POS2 MCA_ADP_POS(MCA_POS1)
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#define BT_MCA_IOPORT_MASK1 0x10
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#define BT_MCA_IOPORT_MASK2 0x03
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#define BT_MCA_IOPORT_SIZE 0x03
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#define BT_MCA_IOPORT(pos) (0x30 + \
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(((u_int32_t)pos &\
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BT_MCA_IOPORT_MASK2) << 8) + \
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(((u_int32_t)pos &\
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BT_MCA_IOPORT_MASK1) >> 2))
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#define BT_MCA_IRQ_POS MCA_ADP_POS(MCA_POS0)
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#define BT_MCA_IRQ_MASK 0x0e
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#define BT_MCA_IRQ(pos) (((pos & BT_MCA_IRQ_MASK) >> 1) + 8)
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#define BT_MCA_DRQ_POS MCA_ADP_POS(MCA_POS3)
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#define BT_MCA_DRQ_MASK 0x0f
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#define BT_MCA_DRQ(pos) (pos & BT_MCA_DRQ_MASK)
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#define BT_MCA_SCSIID_POS MCA_ADP_POS(MCA_POS2)
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#define BT_MCA_SCSIID_MASK 0xe0
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#define BT_MCA_SCSIID(pos) ((pos & BT_MCA_SCSIID_MASK) >> 5)
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static bus_dma_filter_t btvlbouncefilter;
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static bus_dmamap_callback_t btmapsensebuffers;
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static void
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bt_mca_release_resources (device_t dev)
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{
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struct bt_softc * bt = device_get_softc(dev);
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if (bt->port)
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bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port);
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if (bt->irq)
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bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
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if (bt->drq)
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bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq);
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bt_free_softc(dev);
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}
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#define BT_MCA_PROBE 0
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#define BT_MCA_ATTACH 1
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static int
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bt_mca_alloc_resources(device_t dev, int mode)
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{
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struct resource * io = NULL;
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struct resource * irq = NULL;
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struct resource * drq = NULL;
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int rid;
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rid = 0;
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io = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
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if (io == NULL) {
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printf("bt_mca_alloc_resources() failed to allocate IOPORT\n");
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return (ENOMEM);
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}
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if (mode == BT_MCA_ATTACH) {
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rid = 0;
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irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
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if (irq == NULL) {
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printf("bt_mca_alloc_resources() failed to allocate IRQ\n");
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goto bad;
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}
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rid = 0;
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drq = bus_alloc_resource_any(dev, SYS_RES_DRQ, &rid, RF_ACTIVE);
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if (drq == NULL) {
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printf("bt_mca_alloc_resources() failed to allocate DRQ\n");
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goto bad;
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}
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}
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bt_init_softc(dev, io, irq, drq);
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return (0);
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bad:
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bt_mca_release_resources(dev);
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return (ENOMEM);
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}
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static int
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bt_mca_probe (device_t dev)
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{
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const char * desc;
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mca_id_t id = mca_get_id(dev);
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struct bt_probe_info info;
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u_int32_t iobase = 0;
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u_int32_t iosize = 0;
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u_int8_t drq = 0;
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u_int8_t irq = 0;
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u_int8_t pos;
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int result;
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desc = mca_match_id(id, bt_mca_devs);
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if (!desc)
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return (ENXIO);
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device_set_desc(dev, desc);
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pos = (mca_pos_read(dev, BT_MCA_IOPORT_POS1) & BT_MCA_IOPORT_MASK1) |
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(mca_pos_read(dev, BT_MCA_IOPORT_POS2) & BT_MCA_IOPORT_MASK2);
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iobase = BT_MCA_IOPORT(pos);
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iosize = BT_MCA_IOPORT_SIZE;
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pos = mca_pos_read(dev, BT_MCA_DRQ_POS);
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drq = BT_MCA_DRQ(pos);
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pos = mca_pos_read(dev, BT_MCA_IRQ_POS);
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irq = BT_MCA_IRQ(pos);
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bt_mark_probed_iop(iobase);
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mca_add_iospace(dev, iobase, iosize);
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/* And allocate them */
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bt_mca_alloc_resources(dev, BT_MCA_PROBE);
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if (bt_port_probe(dev, &info) != 0) {
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printf("bt_mca_probe: Probe failed for "
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"card at slot %d\n", mca_get_slot(dev) + 1);
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result = ENXIO;
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} else {
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mca_add_drq(dev, drq);
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mca_add_irq(dev, irq);
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result = 0;
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}
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bt_mca_release_resources(dev);
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return (result);
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}
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static int
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bt_mca_attach (device_t dev)
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{
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struct bt_softc * bt = device_get_softc(dev);
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int error = 0;
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/* Allocate resources */
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if ((error = bt_mca_alloc_resources(dev, BT_MCA_ATTACH))) {
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device_printf(dev, "Unable to allocate resources in bt_mca_attach()\n");
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return (error);
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}
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isa_dmacascade(rman_get_start(bt->drq));
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/* Allocate a dmatag for our CCB DMA maps */
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if (bus_dma_tag_create( /* parent */ NULL,
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/* alignemnt */ 1,
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/* boundary */ 0,
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/* lowaddr */ BUS_SPACE_MAXADDR_24BIT,
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/* highaddr */ BUS_SPACE_MAXADDR,
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/* filter */ btvlbouncefilter,
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/* filterarg */ bt,
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/* maxsize */ BUS_SPACE_MAXSIZE_32BIT,
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/* nsegments */ ~0,
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/* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
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/* flags */ 0,
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/* lockfunc */ busdma_lock_mutex,
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/* lockarg */ &Giant,
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&bt->parent_dmat) != 0) {
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bt_mca_release_resources(dev);
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return (ENOMEM);
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}
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if (bt_init(dev)) {
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bt_mca_release_resources(dev);
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return (ENOMEM);
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}
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/* DMA tag for our sense buffers */
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if (bus_dma_tag_create( /* parent */ bt->parent_dmat,
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/* alignment */ 1,
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/* boundary */ 0,
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/* lowaddr */ BUS_SPACE_MAXADDR,
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/* highaddr */ BUS_SPACE_MAXADDR,
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/* filter */ NULL,
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/* filterarg */ NULL,
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/* maxsize */ bt->max_ccbs *
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sizeof(struct scsi_sense_data),
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/* nsegments */ 1,
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/* maxsegsz */ BUS_SPACE_MAXSIZE_32BIT,
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/* flags */ 0,
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/* lockfunc */ busdma_lock_mutex,
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/* lockarg */ &Giant,
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&bt->sense_dmat) != 0) {
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bt_mca_release_resources(dev);
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return (ENOMEM);
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}
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bt->init_level++;
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/* Allocation of sense buffers */
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if (bus_dmamem_alloc(bt->sense_dmat,
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(void **)&bt->sense_buffers,
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BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
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bt_mca_release_resources(dev);
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return (ENOMEM);
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}
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bt->init_level++;
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/* And permanently map them */
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bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,
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bt->sense_buffers,
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bt->max_ccbs * sizeof(*bt->sense_buffers),
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btmapsensebuffers, bt, /*flags*/0);
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bt->init_level++;
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if ((error = bt_attach(dev))) {
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bt_mca_release_resources(dev);
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return (error);
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}
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return (0);
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}
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/*
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* This code should be shared with the ISA
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* stubs as its exactly the same.
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*/
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#define BIOS_MAP_SIZE (16 * 1024)
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static int
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btvlbouncefilter(void *arg, bus_addr_t addr)
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{
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struct bt_softc *bt;
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bt = (struct bt_softc *)arg;
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addr &= BUS_SPACE_MAXADDR_24BIT;
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if (addr == 0
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|| (addr >= bt->bios_addr
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&& addr < (bt->bios_addr + BIOS_MAP_SIZE)))
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return (1);
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return (0);
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}
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static void
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btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
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{
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struct bt_softc* bt;
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bt = (struct bt_softc*)arg;
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bt->sense_buffers_physbase = segs->ds_addr;
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}
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static device_method_t bt_mca_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, bt_mca_probe),
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DEVMETHOD(device_attach, bt_mca_attach),
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{ 0, 0 }
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};
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static driver_t bt_mca_driver = {
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"bt",
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bt_mca_methods,
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sizeof(struct bt_softc),
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};
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static devclass_t bt_devclass;
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DRIVER_MODULE(bt, mca, bt_mca_driver, bt_devclass, 0, 0);
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