231 lines
6.2 KiB
C
231 lines
6.2 KiB
C
/*
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* Product specific probe and attach routines for:
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* Buslogic BT946, BT948, BT956, BT958 SCSI controllers
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*
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* Copyright (c) 1995, 1997, 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_pci.c,v 1.8 1999/07/03 20:17:01 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/bus.h>
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#include <pci/pcireg.h>
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#include <pci/pcivar.h>
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#include <machine/bus_memio.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 <dev/buslogic/btreg.h>
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#define BT_PCI_IOADDR PCIR_MAPS
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#define BT_PCI_MEMADDR PCIR_MAPS + 4
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#define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER 0x1040104Bul
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#define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC 0x0140104Bul
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#define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT 0x8130104Bul
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static int
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bt_pci_alloc_resources(device_t dev)
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{
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int command, type = 0, rid, zero;
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struct resource *regs = 0;
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struct resource *irq = 0;
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command = pci_read_config(dev, PCIR_COMMAND, /*bytes*/1);
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#if 0
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/* XXX Memory Mapped I/O seems to cause problems */
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if (command & PCIM_CMD_MEMEN) {
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type = SYS_RES_MEMORY;
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rid = BT_PCI_MEMADDR;
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regs = bus_alloc_resource(dev, type, &rid,
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0, ~0, 1, RF_ACTIVE);
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}
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#else
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if (!regs && (command & PCIM_CMD_PORTEN)) {
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type = SYS_RES_IOPORT;
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rid = BT_PCI_IOADDR;
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regs = bus_alloc_resource(dev, type, &rid,
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0, ~0, 1, RF_ACTIVE);
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}
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#endif
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if (!regs)
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return (ENOMEM);
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zero = 0;
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irq = bus_alloc_resource(dev, SYS_RES_IRQ, &zero,
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0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
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if (!irq) {
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bus_release_resource(dev, type, rid, regs);
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return (ENOMEM);
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}
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bt_init_softc(dev, regs, irq, 0);
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return (0);
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}
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static void
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bt_pci_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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/* XXX can't cope with memory registers anyway */
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bus_release_resource(dev, SYS_RES_IOPORT,
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BT_PCI_IOADDR, 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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bt_free_softc(dev);
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}
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static int
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bt_pci_probe(device_t dev)
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{
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switch (pci_get_devid(dev)) {
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case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER:
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case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC:
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{
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struct bt_softc *bt = device_get_softc(dev);
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pci_info_data_t pci_info;
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int error;
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error = bt_pci_alloc_resources(dev);
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if (error)
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return (error);
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/*
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* Determine if an ISA compatible I/O port has been
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* enabled. If so, record the port so it will not
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* be probed by our ISA probe. If the PCI I/O port
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* was not set to the compatibility port, disable it.
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*/
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error = bt_cmd(bt, BOP_INQUIRE_PCI_INFO,
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/*param*/NULL, /*paramlen*/0,
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(u_int8_t*)&pci_info, sizeof(pci_info),
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DEFAULT_CMD_TIMEOUT);
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if (error == 0
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&& pci_info.io_port < BIO_DISABLED) {
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bt_mark_probed_bio(pci_info.io_port);
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if (bt->bsh != bt_iop_from_bio(pci_info.io_port)) {
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u_int8_t new_addr;
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new_addr = BIO_DISABLED;
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bt_cmd(bt, BOP_MODIFY_IO_ADDR,
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/*param*/&new_addr,
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/*paramlen*/1, /*reply_buf*/NULL,
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/*reply_len*/0,
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DEFAULT_CMD_TIMEOUT);
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}
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}
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bt_pci_release_resources(dev);
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device_set_desc(dev, "Buslogic Multi-Master SCSI Host Adapter");
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return (0);
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}
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default:
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break;
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}
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return (ENXIO);
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}
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static int
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bt_pci_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 opri;
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int error;
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/* Initialize softc */
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error = bt_pci_alloc_resources(dev);
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if (error) {
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device_printf(dev, "can't allocate resources in bt_pci_attach\n");
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return error;
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}
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/* Allocate a dmatag for our CCB DMA maps */
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/* XXX Should be a child of the PCI bus dma tag */
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if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
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/*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
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/*highaddr*/BUS_SPACE_MAXADDR,
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/*filter*/NULL, /*filterarg*/NULL,
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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_pci_release_resources(dev);
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return (ENOMEM);
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}
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/*
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* Protect ourself from spurrious interrupts during
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* intialization and attach. We should really rely
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* on interrupts during attach, but we don't have
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* access to our interrupts during ISA probes, so until
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* that changes, we mask our interrupts during attach
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* too.
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*/
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opri = splcam();
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if (bt_probe(dev) || bt_fetch_adapter_info(dev) || bt_init(dev)) {
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bt_pci_release_resources(dev);
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splx(opri);
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return (ENXIO);
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}
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error = bt_attach(dev);
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splx(opri);
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if (error) {
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bt_pci_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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static device_method_t bt_pci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, bt_pci_probe),
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DEVMETHOD(device_attach, bt_pci_attach),
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{ 0, 0 }
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};
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static driver_t bt_pci_driver = {
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"bt",
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bt_pci_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, pci, bt_pci_driver, bt_devclass, 0, 0);
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