312 lines
8.2 KiB
C
312 lines
8.2 KiB
C
/*
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* Product specific probe and attach routines for:
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* Buslogic BT-54X and BT-445 cards
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*
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* Copyright (c) 1998 Justin T. Gibbs
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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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* without modification, immediately at the beginning of the file.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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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 FOR
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* 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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* $Id: bt_isa.c,v 1.4 1998/10/12 18:53:33 imp Exp $
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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 <machine/bus_pio.h>
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#include <machine/bus.h>
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#include <i386/isa/isa_device.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 int bt_isa_probe __P((struct isa_device *dev));
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static int bt_isa_attach __P((struct isa_device *dev));
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static void bt_isa_intr __P((void *unit));
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static bus_dma_filter_t btvlbouncefilter;
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static bus_dmamap_callback_t btmapsensebuffers;
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struct isa_driver btdriver =
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{
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bt_isa_probe,
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bt_isa_attach,
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"bt"
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};
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/*
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* Check if the device can be found at the port given
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* and if so, set it up ready for further work
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* as an argument, takes the isa_device structure from
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* autoconf.c
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*/
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static int
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bt_isa_probe(dev)
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struct isa_device *dev;
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{
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/*
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* find unit and check we have that many defined
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*/
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struct bt_softc *bt;
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int port_index;
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int max_port_index;
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/*
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* We ignore the unit number assigned by config to allow
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* consistant numbering between PCI/EISA/ISA devices.
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* This is a total kludge until we have a configuration
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* manager.
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*/
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dev->id_unit = bt_unit;
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bt = NULL;
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port_index = 0;
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max_port_index = BT_NUM_ISAPORTS - 1;
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/*
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* Bound our board search if the user has
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* specified an exact port.
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*/
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bt_find_probe_range(dev->id_iobase, &port_index, &max_port_index);
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if (port_index < 0)
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return 0;
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/* Attempt to find an adapter */
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for (;port_index <= max_port_index; port_index++) {
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config_data_t config_data;
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u_int ioport;
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int error;
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ioport = bt_iop_from_bio(port_index);
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/*
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* Ensure this port has not already been claimed already
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* by a PCI, EISA or ISA adapter.
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*/
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if (bt_check_probed_iop(ioport) != 0)
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continue;
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dev->id_iobase = ioport;
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if (haveseen_isadev(dev, CC_IOADDR | CC_QUIET))
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continue;
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/* Allocate a softc for use during probing */
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bt = bt_alloc(dev->id_unit, I386_BUS_SPACE_IO, ioport);
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if (bt == NULL)
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break;
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/* We're going to attempt to probe it now, so mark it probed */
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bt_mark_probed_bio(port_index);
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/* See if there is really a card present */
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if (bt_probe(bt) || bt_fetch_adapter_info(bt)) {
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bt_free(bt);
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continue;
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}
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/*
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* Determine our IRQ, and DMA settings and
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* export them to the configuration system.
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*/
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error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
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(u_int8_t*)&config_data, sizeof(config_data),
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DEFAULT_CMD_TIMEOUT);
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if (error != 0) {
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printf("bt_isa_probe: Could not determine IRQ or DMA "
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"settings for adapter at 0x%x. Failing probe\n",
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ioport);
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bt_free(bt);
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continue;
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}
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if (bt->model[0] == '5') {
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/* DMA settings only make sense for ISA cards */
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switch (config_data.dma_chan) {
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case DMA_CHAN_5:
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dev->id_drq = 5;
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break;
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case DMA_CHAN_6:
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dev->id_drq = 6;
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break;
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case DMA_CHAN_7:
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dev->id_drq = 7;
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break;
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default:
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printf("bt_isa_probe: Invalid DMA setting "
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"detected for adapter at 0x%x. "
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"Failing probe\n", ioport);
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return (0);
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}
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} else {
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/* VL DMA */
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dev->id_drq = -1;
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}
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dev->id_irq = (config_data.irq << 9);
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dev->id_intr = bt_isa_intr;
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bt_unit++;
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return (BT_NREGS);
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}
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return (0);
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}
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/*
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* Attach all the sub-devices we can find
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*/
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static int
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bt_isa_attach(dev)
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struct isa_device *dev;
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{
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struct bt_softc *bt;
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bus_dma_filter_t *filter;
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void *filter_arg;
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bus_addr_t lowaddr;
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bt = bt_softcs[dev->id_unit];
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if (dev->id_drq != -1)
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isa_dmacascade(dev->id_drq);
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/* Allocate our parent dmatag */
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filter = NULL;
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filter_arg = NULL;
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lowaddr = BUS_SPACE_MAXADDR_24BIT;
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if (bt->model[0] == '4') {
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/*
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* This is a VL adapter. Typically, VL devices have access
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* to the full 32bit address space. On BT-445S adapters
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* prior to revision E, there is a hardware bug that causes
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* corruption of transfers to/from addresses in the range of
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* the BIOS modulo 16MB. The only properly functioning
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* BT-445S Host Adapters have firmware version 3.37.
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* If we encounter one of these adapters and the BIOS is
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* installed, install a filter function for our bus_dma_map
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* that will catch these accesses and bounce them to a safe
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* region of memory.
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*/
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if (bt->bios_addr != 0
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&& strcmp(bt->model, "445S") == 0
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&& strcmp(bt->firmware_ver, "3.37") < 0) {
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filter = btvlbouncefilter;
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filter_arg = bt;
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} else {
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lowaddr = BUS_SPACE_MAXADDR_32BIT;
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}
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}
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/* XXX Should be a child of the ISA or VL bus dma tag */
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if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/0, /*boundary*/0,
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lowaddr, /*highaddr*/BUS_SPACE_MAXADDR,
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filter, filter_arg,
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/*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
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/*nsegments*/BUS_SPACE_UNRESTRICTED,
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/*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
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/*flags*/0, &bt->parent_dmat) != 0) {
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bt_free(bt);
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return (-1);
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}
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if (bt_init(bt)) {
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bt_free(bt);
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return (-1);
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}
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if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
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/* DMA tag for our sense buffers */
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if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/0,
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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, /*filterarg*/NULL,
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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, &bt->sense_dmat) != 0) {
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bt_free(bt);
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return (-1);
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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_free(bt);
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return (-1);
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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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}
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return (bt_attach(bt));
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}
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/*
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* Handle an ISA interrupt.
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* XXX should go away as soon as ISA interrupt handlers
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* take a (void *) arg.
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*/
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static void
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bt_isa_intr(void *unit)
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{
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struct bt_softc* arg = bt_softcs[(int)unit];
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bt_intr((void *)arg);
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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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