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-rw-r--r--sys/isa/bt_isa.c322
1 files changed, 322 insertions, 0 deletions
diff --git a/sys/isa/bt_isa.c b/sys/isa/bt_isa.c
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--- /dev/null
+++ b/sys/isa/bt_isa.c
@@ -0,0 +1,322 @@
+/*
+ * Product specific probe and attach routines for:
+ * Buslogic BT-54X and BT-445 cards
+ *
+ * Copyright (c) 1998 Justin T. Gibbs
+ * 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,
+ * without modification, immediately at the beginning of the file.
+ * 2. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * 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.
+ *
+ * $Id$
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+
+#include <machine/bus_pio.h>
+#include <machine/bus.h>
+
+#include <i386/isa/isa_device.h>
+#include <dev/buslogic/btreg.h>
+
+#include <cam/scsi/scsi_all.h>
+
+#include "ioconf.h"
+
+static int bt_isa_probe __P((struct isa_device *dev));
+static int bt_isa_attach __P((struct isa_device *dev));
+static void bt_isa_intr __P((void *unit));
+
+static bus_dma_filter_t btvlbouncefilter;
+static bus_dmamap_callback_t btmapsensebuffers;
+
+struct isa_driver btdriver =
+{
+ bt_isa_probe,
+ bt_isa_attach,
+ "bt"
+};
+
+/*
+ * Check if the device can be found at the port given
+ * and if so, set it up ready for further work
+ * as an argument, takes the isa_device structure from
+ * autoconf.c
+ */
+static int
+bt_isa_probe(dev)
+ struct isa_device *dev;
+{
+ /*
+ * find unit and check we have that many defined
+ */
+ struct bt_softc *bt;
+ int port_index;
+ int max_port_index;
+
+ /*
+ * We ignore the unit number assigned by config to allow
+ * consistant numbering between PCI/EISA/ISA devices.
+ * This is a total kludge until we have a configuration
+ * manager.
+ */
+ dev->id_unit = bt_unit;
+
+ bt = NULL;
+ port_index = 0;
+ max_port_index = BT_NUM_ISAPORTS - 1;
+ /*
+ * Bound our board search if the user has
+ * specified an exact port.
+ */
+ if (dev->id_iobase > 0) {
+ for (;port_index <= max_port_index; port_index++)
+ if (dev->id_iobase >= bt_isa_ports[port_index].addr)
+ break;
+ if ((port_index > max_port_index)
+ || (dev->id_iobase != bt_isa_ports[port_index].addr)) {
+ printf("
+bt_isa_probe: Invalid baseport of 0x%x specified.
+bt_isa_probe: Nearest valid baseport is 0x%x.
+bt_isa_probe: Failing probe.\n",
+ dev->id_iobase,
+ (port_index <= max_port_index)
+ ? bt_isa_ports[port_index].addr
+ : bt_isa_ports[max_port_index].addr);
+ return 0;
+ }
+ }
+
+ /* Attempt to find an adapter */
+ for (;port_index <= max_port_index; port_index++) {
+ config_data_t config_data;
+ u_int ioport;
+ int error;
+
+ ioport = bt_isa_ports[port_index].addr;
+
+ /*
+ * Ensure this port has not already been claimed already
+ * by a PCI or EISA adapter.
+ */
+ if (bt_check_probed_iop(ioport) != 0)
+ continue;
+
+ /* Allocate a softc for use during probing */
+ bt = bt_alloc(dev->id_unit, I386_BUS_SPACE_IO, ioport);
+
+ if (bt == NULL)
+ break;
+
+ /* We're going to attempt to probe it now, so mark it probed */
+ bt_mark_probed_bio(port_index);
+
+ /* See if there is really a card present */
+ if (bt_probe(bt) || bt_fetch_adapter_info(bt)) {
+ bt_free(bt);
+ continue;
+ }
+
+ /*
+ * Determine our IRQ, and DMA settings and
+ * export them to the configuration system.
+ */
+ error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
+ (u_int8_t*)&config_data, sizeof(config_data),
+ DEFAULT_CMD_TIMEOUT);
+ if (error != 0) {
+ printf("bt_isa_probe: Could not determine IRQ or DMA "
+ "settings for adapter at 0x%x. Failing probe\n",
+ ioport);
+ bt_free(bt);
+ continue;
+ }
+
+ if (bt->model[0] == '5') {
+ /* DMA settings only make sense for ISA cards */
+ switch (config_data.dma_chan) {
+ case DMA_CHAN_5:
+ dev->id_drq = 5;
+ break;
+ case DMA_CHAN_6:
+ dev->id_drq = 6;
+ break;
+ case DMA_CHAN_7:
+ dev->id_drq = 7;
+ break;
+ default:
+ printf("bt_isa_probe: Invalid DMA setting "
+ "detected for adapter at 0x%x. "
+ "Failing probe\n", ioport);
+ }
+ } else {
+ /* VL DMA */
+ dev->id_drq = -1;
+ }
+ dev->id_iobase = bt_isa_ports[port_index].addr;
+ dev->id_irq = (config_data.irq << 9);
+ dev->id_intr = bt_isa_intr;
+ bt_unit++;
+ return (BT_NREGS);
+ }
+
+ return (0);
+}
+
+/*
+ * Attach all the sub-devices we can find
+ */
+static int
+bt_isa_attach(dev)
+ struct isa_device *dev;
+{
+ struct bt_softc *bt;
+ bus_dma_filter_t *filter;
+ void *filter_arg;
+ bus_addr_t lowaddr;
+
+ bt = bt_softcs[dev->id_unit];
+ if (dev->id_drq != -1)
+ isa_dmacascade(dev->id_drq);
+
+ /* Allocate our parent dmatag */
+ filter = NULL;
+ filter_arg = NULL;
+ lowaddr = BUS_SPACE_MAXADDR_24BIT;
+ if (bt->model[0] == '4') {
+ /*
+ * This is a VL adapter. Typically, VL devices have access
+ * to the full 32bit address space. On BT-445S adapters
+ * prior to revision E, there is a hardware bug that causes
+ * corruption of transfers to/from addresses in the range of
+ * the BIOS modulo 16MB. The only properly functioning
+ * BT-445S Host Adapters have firmware version 3.37.
+ * If we encounter one of these adapters and the BIOS is
+ * installed, install a filter function for our bus_dma_map
+ * that will catch these accesses and bounce them to a safe
+ * region of memory.
+ */
+ if (bt->bios_addr != 0
+ && strcmp(bt->model, "445S") == 0
+ && strcmp(bt->firmware_ver, "3.37") < 0) {
+ filter = btvlbouncefilter;
+ filter_arg = bt;
+ } else {
+ lowaddr = BUS_SPACE_MAXADDR_32BIT;
+ }
+ }
+
+ /* XXX Should be a child of the ISA or VL bus dma tag */
+ if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/0, /*boundary*/0,
+ lowaddr, /*highaddr*/BUS_SPACE_MAXADDR,
+ filter, filter_arg,
+ /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
+ /*nsegments*/BUS_SPACE_UNRESTRICTED,
+ /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
+ /*flags*/0, &bt->parent_dmat) != 0) {
+ bt_free(bt);
+ return (-1);
+ }
+
+ if (bt_init(bt)) {
+ bt_free(bt);
+ return (-1);
+ }
+
+ if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
+ /* DMA tag for our sense buffers */
+ if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/0,
+ /*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_free(bt);
+ return (-1);
+ }
+
+ 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_free(bt);
+ return (-1);
+ }
+
+ 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++;
+ }
+
+ return (bt_attach(bt));
+}
+
+/*
+ * Handle an ISA interrupt.
+ * XXX should go away as soon as ISA interrupt handlers
+ * take a (void *) arg.
+ */
+static void
+bt_isa_intr(void *unit)
+{
+ struct bt_softc* arg = bt_softcs[(int)unit];
+ bt_intr((void *)arg);
+}
+
+#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;
+}
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