The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/buslogic/bt_pci.c

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    1 /*
    2  * Product specific probe and attach routines for:
    3  *      Buslogic BT946, BT948, BT956, BT958 SCSI controllers
    4  *
    5  * Copyright (c) 1995, 1997, 1998 Justin T. Gibbs
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions, and the following disclaimer,
   13  *    without modification, immediately at the beginning of the file.
   14  * 2. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD: stable/4/sys/dev/buslogic/bt_pci.c 56176 2000-01-17 12:38:00Z nyan $
   30  */
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/kernel.h>
   35 #include <sys/bus.h>
   36 
   37 #include <pci/pcireg.h>
   38 #include <pci/pcivar.h>
   39 
   40 #include <machine/bus_memio.h>
   41 #include <machine/bus_pio.h>
   42 #include <machine/bus.h>
   43 #include <machine/resource.h>
   44 #include <sys/rman.h>
   45 
   46 #include <dev/buslogic/btreg.h>
   47 
   48 #define BT_PCI_IOADDR   PCIR_MAPS
   49 #define BT_PCI_MEMADDR  PCIR_MAPS + 4
   50 
   51 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER      0x1040104Bul
   52 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC   0x0140104Bul
   53 #define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT       0x8130104Bul
   54 
   55 static int
   56 bt_pci_alloc_resources(device_t dev)
   57 {
   58         int             command, type = 0, rid, zero;
   59         struct resource *regs = 0;
   60         struct resource *irq = 0;
   61 
   62         command = pci_read_config(dev, PCIR_COMMAND, /*bytes*/1);
   63 #if 0
   64         /* XXX Memory Mapped I/O seems to cause problems */
   65         if (command & PCIM_CMD_MEMEN) {
   66                 type = SYS_RES_MEMORY;
   67                 rid = BT_PCI_MEMADDR;
   68                 regs = bus_alloc_resource(dev, type, &rid,
   69                                           0, ~0, 1, RF_ACTIVE);
   70         }
   71 #else
   72         if (!regs && (command & PCIM_CMD_PORTEN)) {
   73                 type = SYS_RES_IOPORT;
   74                 rid = BT_PCI_IOADDR;
   75                 regs = bus_alloc_resource(dev, type, &rid,
   76                                           0, ~0, 1, RF_ACTIVE);
   77         }
   78 #endif
   79         if (!regs)
   80                 return (ENOMEM);
   81         
   82         zero = 0;
   83         irq = bus_alloc_resource(dev, SYS_RES_IRQ, &zero,
   84                                  0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
   85         if (!irq) {
   86                 bus_release_resource(dev, type, rid, regs);
   87                 return (ENOMEM);
   88         }
   89 
   90         bt_init_softc(dev, regs, irq, 0);
   91 
   92         return (0);
   93 }
   94 
   95 static void
   96 bt_pci_release_resources(device_t dev)
   97 {
   98         struct bt_softc *bt = device_get_softc(dev);
   99 
  100         if (bt->port)
  101                 /* XXX can't cope with memory registers anyway */
  102                 bus_release_resource(dev, SYS_RES_IOPORT,
  103                                      BT_PCI_IOADDR, bt->port);
  104         if (bt->irq)
  105                 bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
  106         bt_free_softc(dev);
  107 }
  108 
  109 static int
  110 bt_pci_probe(device_t dev)
  111 {
  112         switch (pci_get_devid(dev)) {
  113                 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER:
  114                 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC:
  115                 {
  116                         struct bt_softc   *bt = device_get_softc(dev);
  117                         pci_info_data_t pci_info;
  118                         int error;
  119 
  120                         error = bt_pci_alloc_resources(dev);
  121                         if (error)
  122                                 return (error);
  123 
  124                         /*
  125                          * Determine if an ISA compatible I/O port has been
  126                          * enabled.  If so, record the port so it will not
  127                          * be probed by our ISA probe.  If the PCI I/O port
  128                          * was not set to the compatibility port, disable it.
  129                          */
  130                         error = bt_cmd(bt, BOP_INQUIRE_PCI_INFO,
  131                                        /*param*/NULL, /*paramlen*/0,
  132                                        (u_int8_t*)&pci_info, sizeof(pci_info),
  133                                        DEFAULT_CMD_TIMEOUT);
  134                         if (error == 0
  135                          && pci_info.io_port < BIO_DISABLED) {
  136                                 bt_mark_probed_bio(pci_info.io_port);
  137                                 if (rman_get_start(bt->port) !=
  138                                     bt_iop_from_bio(pci_info.io_port)) {
  139                                         u_int8_t new_addr;
  140 
  141                                         new_addr = BIO_DISABLED;
  142                                         bt_cmd(bt, BOP_MODIFY_IO_ADDR,
  143                                                /*param*/&new_addr,
  144                                                /*paramlen*/1, /*reply_buf*/NULL,
  145                                                /*reply_len*/0,
  146                                                DEFAULT_CMD_TIMEOUT);
  147                                 }
  148                         }
  149                         bt_pci_release_resources(dev);
  150                         device_set_desc(dev, "Buslogic Multi-Master SCSI Host Adapter");
  151                         return (0);
  152                 }
  153                 default:
  154                         break;
  155         }
  156 
  157         return (ENXIO);
  158 }
  159 
  160 static int
  161 bt_pci_attach(device_t dev)
  162 {
  163         struct bt_softc   *bt = device_get_softc(dev);
  164         int                opri;
  165         int                error;
  166 
  167         /* Initialize softc */
  168         error = bt_pci_alloc_resources(dev);
  169         if (error) {
  170                 device_printf(dev, "can't allocate resources in bt_pci_attach\n");
  171                 return error;
  172         }
  173 
  174         /* Allocate a dmatag for our CCB DMA maps */
  175         /* XXX Should be a child of the PCI bus dma tag */
  176         if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
  177                                /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
  178                                /*highaddr*/BUS_SPACE_MAXADDR,
  179                                /*filter*/NULL, /*filterarg*/NULL,
  180                                /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
  181                                /*nsegments*/BUS_SPACE_UNRESTRICTED,
  182                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
  183                                /*flags*/0, &bt->parent_dmat) != 0) {
  184                 bt_pci_release_resources(dev);
  185                 return (ENOMEM);
  186         }
  187 
  188         /*
  189          * Protect ourself from spurrious interrupts during
  190          * intialization and attach.  We should really rely
  191          * on interrupts during attach, but we don't have
  192          * access to our interrupts during ISA probes, so until
  193          * that changes, we mask our interrupts during attach
  194          * too.
  195          */
  196         opri = splcam();
  197 
  198         if (bt_probe(dev) || bt_fetch_adapter_info(dev) || bt_init(dev)) {
  199                 bt_pci_release_resources(dev);
  200                 splx(opri);
  201                 return (ENXIO);
  202         }
  203 
  204         error = bt_attach(dev);
  205         splx(opri);
  206 
  207         if (error) {
  208                 bt_pci_release_resources(dev);
  209                 return (error);
  210         }
  211 
  212         return (0);
  213 }
  214 
  215 static device_method_t bt_pci_methods[] = {
  216         /* Device interface */
  217         DEVMETHOD(device_probe,         bt_pci_probe),
  218         DEVMETHOD(device_attach,        bt_pci_attach),
  219 
  220         { 0, 0 }
  221 };
  222 
  223 static driver_t bt_pci_driver = {
  224         "bt",
  225         bt_pci_methods,
  226         sizeof(struct bt_softc),
  227 };
  228 
  229 static devclass_t bt_devclass;
  230 
  231 DRIVER_MODULE(bt, pci, bt_pci_driver, bt_devclass, 0, 0);

Cache object: cd7a91fb0bc58059408368633b47bb04


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