This adds support for the Buslogic/Bustek/Storage Dimensions

MCA SCSI adapters.

bt_mca.c is going to live in sys/dev/buslogic instead of sys/dev/mca
as per a conversation with Peter, Doug and Mike.

Thanks to Andy Farkas <andyf@speednet.com.au> for being such a good
sport and doing all the testing for me (as I don't actually own one
of these cards.  Yet.)

2 files changed, 325 insertions, 0 deletions

diff --git a/sys/conf/files b/sys/conf/files
index 46002db098e1..c4afc4a905f2 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -781,3 +781,4 @@ dev/pcm/pci/es1370.c	optional pcm pci
 dev/pcm/pci/t4dwave.c	optional pcm pci
 dev/pcm/pci/aureal.c	optional pcm pci
 dev/mca/mca_bus.c	optional mca
+dev/buslogic/bt_mca.c	optional bt mca
diff --git a/sys/dev/buslogic/bt_mca.c b/sys/dev/buslogic/bt_mca.c
new file mode 100644
index 000000000000..a55aedd4504d
--- /dev/null
+++ b/sys/dev/buslogic/bt_mca.c
@@ -0,0 +1,324 @@
+/*-
+ * Copyright (c) 1999 Matthew N. Dodd <winter@jurai.net>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Written using the bt_isa/bt_pci code as a reference.
+ *
+ * Thanks to Andy Farkas <andyf@speednet.com.au> for
+ * testing and feedback.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+
+#include <machine/cpufunc.h>
+#include <machine/md_var.h>
+
+#include <sys/module.h>
+#include <sys/bus.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/rman.h>
+
+#include <dev/mca/mca_busreg.h>
+#include <dev/mca/mca_busvar.h>
+
+#include <i386/isa/isa_dma.h>
+
+#include <dev/buslogic/btreg.h>
+
+#include <cam/scsi/scsi_all.h>
+
+static struct mca_ident bt_mca_devs[] = {
+	{ 0x0708, "BusLogic 32 Bit Bus Master MCA-to-SCSI Host Adapter" },
+	{ 0x0708, "BusTek BT-640A Micro Channel to SCSI Host Adapter" },
+	{ 0x0708, "Storage Dimensions SDC3211B 32-bit SCSI Host Adapter" },
+	{ 0x0709, "Storage Dimensions SDC3211F 32-bit FAST SCSI Host Adapter" },
+	{ 0, NULL },
+};
+
+#define BT_MCA_IOPORT_POS1		MCA_ADP_POS(MCA_POS0)
+#define BT_MCA_IOPORT_POS2		MCA_ADP_POS(MCA_POS1)
+#define BT_MCA_IOPORT_MASK1		0x10
+#define BT_MCA_IOPORT_MASK2		0x03
+#define BT_MCA_IOPORT_SIZE		0x03
+#define BT_MCA_IOPORT(pos)		(0x30 + \
+					(((u_int32_t)pos &\
+						BT_MCA_IOPORT_MASK2) << 8) + \
+					(((u_int32_t)pos &\
+						BT_MCA_IOPORT_MASK1) >> 2))
+
+#define BT_MCA_IRQ_POS			MCA_ADP_POS(MCA_POS0)
+#define BT_MCA_IRQ_MASK			0x0e
+#define BT_MCA_IRQ(pos)			(((pos & BT_MCA_IRQ_MASK) >> 1) + 8)
+
+#define BT_MCA_DRQ_POS			MCA_ADP_POS(MCA_POS3)
+#define BT_MCA_DRQ_MASK			0x0f
+#define BT_MCA_DRQ(pos)			(pos & BT_MCA_DRQ_MASK)
+
+#define BT_MCA_SCSIID_POS		MCA_ADP_POS(MCA_POS2)
+#define BT_MCA_SCSIID_MASK		0xe0
+#define BT_MCA_SCSIID(pos)		((pos & BT_MCA_SCSIID_MASK) >> 5)
+
+static	bus_dma_filter_t	btvlbouncefilter;
+static	bus_dmamap_callback_t	btmapsensebuffers;
+
+static void
+bt_mca_release_resources (device_t dev)
+{
+	struct  bt_softc *	bt = device_get_softc(dev);
+
+	if (bt->port)
+		bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port);
+	if (bt->irq)
+		bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
+	if (bt->drq)
+		bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq);
+
+	bt_free_softc(dev);
+}
+
+static int
+bt_mca_alloc_resources(device_t dev)
+{
+	struct resource *	io = NULL;
+	struct resource *	irq = NULL;
+	struct resource *	drq = NULL;
+	int			rid;
+
+	rid = 0;
+	io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
+				0, ~0, 1, RF_ACTIVE);
+	if (io == NULL)
+		return (ENOMEM);
+
+	if (mca_get_irq(dev) != -1) {
+		rid = 0;
+		irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
+					 0, ~0, 1, RF_ACTIVE);
+		if (irq == NULL)
+			goto bad;
+	} else {
+		irq = 0;
+	}
+
+	if (mca_get_drq(dev) != -1) {
+		rid = 0;
+		drq = bus_alloc_resource(dev, SYS_RES_DRQ, &rid,
+					 0, ~0, 1, RF_ACTIVE);
+		if (drq == NULL)
+			goto bad;
+	} else {
+		drq = 0;
+	}
+
+	bt_init_softc(dev, io, irq, drq);
+
+	return (0);
+bad:
+	bt_mca_release_resources(dev);
+	return (ENOMEM);
+}
+
+static int
+bt_mca_probe (device_t dev)
+{
+	const char *		desc;
+	mca_id_t		id = mca_get_id(dev);
+	struct bt_probe_info	info;
+	u_int32_t		iobase = 0;
+	u_int32_t		iosize = 0;
+	u_int8_t		drq = 0;
+	u_int8_t		irq = 0;
+	u_int8_t		pos;
+	int			result;
+
+	desc = mca_match_id(id, bt_mca_devs);
+	if (!desc)
+		return (ENXIO);
+	device_set_desc(dev, desc);
+
+	pos = (mca_pos_read(dev, BT_MCA_IOPORT_POS1) & BT_MCA_IOPORT_MASK1) |
+	      (mca_pos_read(dev, BT_MCA_IOPORT_POS2) & BT_MCA_IOPORT_MASK2);
+	iobase = BT_MCA_IOPORT(pos);
+	iosize = BT_MCA_IOPORT_SIZE;
+
+	pos = mca_pos_read(dev, BT_MCA_DRQ_POS);
+	drq = BT_MCA_DRQ(pos);
+
+	pos = mca_pos_read(dev, BT_MCA_IRQ_POS);
+	irq = BT_MCA_IRQ(pos);
+
+	bt_mark_probed_iop(iobase);
+
+	mca_add_iospace(dev, iobase, iosize, RF_ALLOCATED);
+
+	/* And allocate them */
+	bt_mca_alloc_resources(dev);
+			
+	if (bt_port_probe(dev, &info) != 0) {
+		printf("bt_mca_probe: Probe failed for "
+		       "card at slot %d\n", mca_get_slot(dev) + 1);
+		result = ENXIO;
+	} else {	       
+		mca_add_drq(dev, drq);
+		mca_add_irq(dev, irq);
+		result = 0;    
+	}	       
+	bt_mca_release_resources(dev);
+
+	return (result);
+}
+
+static int
+bt_mca_attach (device_t dev)
+{
+	struct bt_softc *	bt = device_get_softc(dev);
+	int			error = 0;
+
+	/* Allocate resources */      
+	if ((error = bt_mca_alloc_resources(dev))) {
+		device_printf(dev, "Unable to allocate resources in bt_mca_attach()\n");
+		return (error);
+	}
+
+	isa_dmacascade(rman_get_start(bt->drq));
+
+	/* Allocate a dmatag for our CCB DMA maps */
+	if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
+			       /*lowaddr*/BUS_SPACE_MAXADDR_24BIT,
+			       /*highaddr*/BUS_SPACE_MAXADDR,
+			       /*filter*/btvlbouncefilter,
+			       /*filterarg*/bt,
+			       /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
+			       /*nsegments*/BUS_SPACE_UNRESTRICTED,
+			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
+			       /*flags*/0, &bt->parent_dmat) != 0) {
+		bt_mca_release_resources(dev);
+		return (ENOMEM);
+	}
+
+	if (bt_init(dev)) {
+		bt_mca_release_resources(dev);
+		return (ENOMEM);
+	}
+
+	/* DMA tag for our sense buffers */
+	if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, 
+			       /*boundary*/0,
+			       /*lowaddr*/BUS_SPACE_MAXADDR,    
+			       /*highaddr*/BUS_SPACE_MAXADDR,   
+			       /*filter*/NULL, /*filterarg*/NULL,
+			       bt->max_ccbs * sizeof(struct scsi_sense_data),
+			       /*nsegments*/1,
+			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
+			       /*flags*/0, &bt->sense_dmat) != 0) {
+		bt_mca_release_resources(dev);
+		return (ENOMEM);
+	}
+
+	bt->init_level++;     
+
+	/* Allocation of sense buffers */
+	if (bus_dmamem_alloc(bt->sense_dmat,
+			     (void **)&bt->sense_buffers,       
+			     BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) {
+		bt_mca_release_resources(dev);
+		return (ENOMEM);
+	}
+
+	bt->init_level++;     
+
+	/* And permanently map them */
+	bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap,       
+			bt->sense_buffers,
+			bt->max_ccbs * sizeof(*bt->sense_buffers),
+			btmapsensebuffers, bt, /*flags*/0);     
+
+	bt->init_level++;     
+
+	if ((error = bt_attach(dev))) {
+		bt_mca_release_resources(dev);
+		return (error);
+	}
+
+	return (0);
+}
+
+/*
+ * This code should be shared with the ISA
+ * stubs as its exactly the same.
+ */
+
+#define BIOS_MAP_SIZE (16 * 1024)
+
+static int
+btvlbouncefilter(void *arg, bus_addr_t addr)
+{
+	struct bt_softc *bt;
+
+	bt = (struct bt_softc *)arg;
+
+	addr &= BUS_SPACE_MAXADDR_24BIT;
+
+	if (addr == 0
+	 || (addr >= bt->bios_addr
+	  && addr < (bt->bios_addr + BIOS_MAP_SIZE)))
+		return (1);
+	return (0);
+}
+
+static void
+btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error)
+{
+	struct bt_softc* bt;
+
+	bt = (struct bt_softc*)arg;
+	bt->sense_buffers_physbase = segs->ds_addr;
+}
+
+static device_method_t bt_mca_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		bt_mca_probe),
+	DEVMETHOD(device_attach,	bt_mca_attach),
+
+	{ 0, 0 }
+};
+
+static driver_t bt_mca_driver = {
+	"bt",
+	bt_mca_methods,
+	sizeof(struct bt_softc),
+};
+
+static devclass_t bt_devclass;
+
+DRIVER_MODULE(bt, mca, bt_mca_driver, bt_devclass, 0, 0);