340 lines
8.6 KiB
C
340 lines
8.6 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, 1999 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 1.9 1999/04/18 19:08:28 peter 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 <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus_pio.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 <isa/isavar.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 bus_dma_filter_t btvlbouncefilter;
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static bus_dmamap_callback_t btmapsensebuffers;
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static int
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bt_isa_alloc_resources(device_t dev)
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{
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int rid;
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struct resource *port;
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struct resource *irq;
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struct resource *drq;
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rid = 0;
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port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
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0, ~0, 1, RF_ACTIVE);
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if (!port)
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return (ENOMEM);
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if (isa_get_irq(dev) != -1) {
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rid = 0;
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irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
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0, ~0, 1, RF_ACTIVE);
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if (!irq) {
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if (port)
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bus_release_resource(dev, SYS_RES_IOPORT,
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0, port);
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return (ENOMEM);
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}
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} else
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irq = 0;
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if (isa_get_drq(dev) != -1) {
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rid = 0;
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drq = bus_alloc_resource(dev, SYS_RES_DRQ, &rid,
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0, ~0, 1, RF_ACTIVE);
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if (!drq) {
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if (port)
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bus_release_resource(dev, SYS_RES_IOPORT,
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0, port);
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if (irq)
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bus_release_resource(dev, SYS_RES_IRQ,
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0, irq);
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return (ENOMEM);
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}
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} else
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drq = 0;
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bt_init_softc(dev, port, irq, drq);
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return (0);
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}
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static void
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bt_isa_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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/*
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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(device_t 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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int port_index;
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int max_port_index;
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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(isa_get_port(dev), &port_index, &max_port_index);
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if (port_index < 0)
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return (ENXIO);
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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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struct bt_probe_info info;
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u_int ioport;
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ioport = bt_iop_from_bio(port_index);
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isa_set_port(dev, ioport);
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isa_set_portsize(dev, BT_NREGS);
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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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/* Initialise the softc for use during probing */
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if (bt_isa_alloc_resources(dev) != 0)
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continue;
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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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if (bt_port_probe(dev, &info) != 0) {
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printf("bt_isa_probe: Probe failed for card at 0x%x\n",
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ioport);
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bt_isa_release_resources(dev);
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continue;
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}
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bt_isa_release_resources(dev);
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isa_set_drq(dev, info.drq);
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isa_set_irq(dev, info.irq);
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return (0);
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}
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return (ENXIO);
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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(device_t dev)
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{
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struct bt_softc *bt = device_get_softc(dev);
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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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int error, drq;
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/* Initialise softc */
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error = bt_isa_alloc_resources(dev);
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if (error) {
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device_printf(dev, "can't allocate resources in bt_isa_attach\n");
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return error;
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}
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/* Program the DMA channel for external control */
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if ((drq = isa_get_drq(dev)) != -1)
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isa_dmacascade(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_isa_release_resources(dev);
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return (ENOMEM);
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}
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error = bt_init(dev);
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if (error) {
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bt_isa_release_resources(dev);
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return (ENOMEM);
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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_isa_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_isa_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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}
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error = bt_attach(dev);
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if (error) {
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bt_isa_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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#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_isa_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, bt_isa_probe),
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DEVMETHOD(device_attach, bt_isa_attach),
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{ 0, 0 }
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};
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static driver_t bt_isa_driver = {
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"bt",
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bt_isa_methods,
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DRIVER_TYPE_CAM,
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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, isa, bt_isa_driver, bt_devclass, 0, 0);
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