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 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: releng/5.3/sys/dev/buslogic/bt_pci.c 129879 2004-05-30 20:08:47Z phk $");
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/kernel.h>
   36 #include <sys/module.h>
   37 #include <sys/lock.h>
   38 #include <sys/mutex.h>
   39 #include <sys/bus.h>
   40 
   41 #include <dev/pci/pcireg.h>
   42 #include <dev/pci/pcivar.h>
   43 
   44 #include <machine/bus_memio.h>
   45 #include <machine/bus_pio.h>
   46 #include <machine/bus.h>
   47 #include <machine/resource.h>
   48 #include <sys/rman.h>
   49 
   50 #include <dev/buslogic/btreg.h>
   51 
   52 #define BT_PCI_IOADDR   PCIR_BAR(0)
   53 #define BT_PCI_MEMADDR  PCIR_BAR(1)
   54 
   55 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER      0x1040104Bul
   56 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC   0x0140104Bul
   57 #define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT       0x8130104Bul
   58 
   59 static int
   60 bt_pci_alloc_resources(device_t dev)
   61 {
   62         int             command, type = 0, rid, zero;
   63         struct resource *regs = 0;
   64         struct resource *irq = 0;
   65 
   66         command = pci_read_config(dev, PCIR_COMMAND, /*bytes*/1);
   67 #if 0
   68         /* XXX Memory Mapped I/O seems to cause problems */
   69         if (command & PCIM_CMD_MEMEN) {
   70                 type = SYS_RES_MEMORY;
   71                 rid = BT_PCI_MEMADDR;
   72                 regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
   73         }
   74 #else
   75         if (!regs && (command & PCIM_CMD_PORTEN)) {
   76                 type = SYS_RES_IOPORT;
   77                 rid = BT_PCI_IOADDR;
   78                 regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
   79         }
   80 #endif
   81         if (!regs)
   82                 return (ENOMEM);
   83         
   84         zero = 0;
   85         irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero,
   86                                      RF_ACTIVE | RF_SHAREABLE);
   87         if (!irq) {
   88                 bus_release_resource(dev, type, rid, regs);
   89                 return (ENOMEM);
   90         }
   91 
   92         bt_init_softc(dev, regs, irq, 0);
   93 
   94         return (0);
   95 }
   96 
   97 static void
   98 bt_pci_release_resources(device_t dev)
   99 {
  100         struct bt_softc *bt = device_get_softc(dev);
  101 
  102         if (bt->port)
  103                 /* XXX can't cope with memory registers anyway */
  104                 bus_release_resource(dev, SYS_RES_IOPORT,
  105                                      BT_PCI_IOADDR, bt->port);
  106         if (bt->irq)
  107                 bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
  108         bt_free_softc(dev);
  109 }
  110 
  111 static int
  112 bt_pci_probe(device_t dev)
  113 {
  114         switch (pci_get_devid(dev)) {
  115                 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER:
  116                 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC:
  117                 {
  118                         struct bt_softc   *bt = device_get_softc(dev);
  119                         pci_info_data_t pci_info;
  120                         int error;
  121 
  122                         error = bt_pci_alloc_resources(dev);
  123                         if (error)
  124                                 return (error);
  125 
  126                         /*
  127                          * Determine if an ISA compatible I/O port has been
  128                          * enabled.  If so, record the port so it will not
  129                          * be probed by our ISA probe.  If the PCI I/O port
  130                          * was not set to the compatibility port, disable it.
  131                          */
  132                         error = bt_cmd(bt, BOP_INQUIRE_PCI_INFO,
  133                                        /*param*/NULL, /*paramlen*/0,
  134                                        (u_int8_t*)&pci_info, sizeof(pci_info),
  135                                        DEFAULT_CMD_TIMEOUT);
  136                         if (error == 0
  137                          && pci_info.io_port < BIO_DISABLED) {
  138                                 bt_mark_probed_bio(pci_info.io_port);
  139                                 if (rman_get_start(bt->port) !=
  140                                     bt_iop_from_bio(pci_info.io_port)) {
  141                                         u_int8_t new_addr;
  142 
  143                                         new_addr = BIO_DISABLED;
  144                                         bt_cmd(bt, BOP_MODIFY_IO_ADDR,
  145                                                /*param*/&new_addr,
  146                                                /*paramlen*/1, /*reply_buf*/NULL,
  147                                                /*reply_len*/0,
  148                                                DEFAULT_CMD_TIMEOUT);
  149                                 }
  150                         }
  151                         bt_pci_release_resources(dev);
  152                         device_set_desc(dev, "Buslogic Multi-Master SCSI Host Adapter");
  153                         return (0);
  154                 }
  155                 default:
  156                         break;
  157         }
  158 
  159         return (ENXIO);
  160 }
  161 
  162 static int
  163 bt_pci_attach(device_t dev)
  164 {
  165         struct bt_softc   *bt = device_get_softc(dev);
  166         int                opri;
  167         int                error;
  168 
  169         /* Initialize softc */
  170         error = bt_pci_alloc_resources(dev);
  171         if (error) {
  172                 device_printf(dev, "can't allocate resources in bt_pci_attach\n");
  173                 return error;
  174         }
  175 
  176         /* Allocate a dmatag for our CCB DMA maps */
  177         /* XXX Should be a child of the PCI bus dma tag */
  178         if (bus_dma_tag_create( /* parent       */ NULL,
  179                                 /* alignemnt    */ 1,
  180                                 /* boundary     */ 0,
  181                                 /* lowaddr      */ BUS_SPACE_MAXADDR_32BIT,
  182                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  183                                 /* filter       */ NULL,
  184                                 /* filterarg    */ NULL,
  185                                 /* maxsize      */ BUS_SPACE_MAXSIZE_32BIT,
  186                                 /* nsegments    */ ~0,
  187                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
  188                                 /* flags        */ 0,
  189                                 /* lockfunc     */ busdma_lock_mutex,
  190                                 /* lockarg      */ &Giant,
  191                                 &bt->parent_dmat) != 0) {
  192                 bt_pci_release_resources(dev);
  193                 return (ENOMEM);
  194         }
  195 
  196         /*
  197          * Protect ourself from spurrious interrupts during
  198          * intialization and attach.  We should really rely
  199          * on interrupts during attach, but we don't have
  200          * access to our interrupts during ISA probes, so until
  201          * that changes, we mask our interrupts during attach
  202          * too.
  203          */
  204         opri = splcam();
  205 
  206         if (bt_probe(dev) || bt_fetch_adapter_info(dev) || bt_init(dev)) {
  207                 bt_pci_release_resources(dev);
  208                 splx(opri);
  209                 return (ENXIO);
  210         }
  211 
  212         error = bt_attach(dev);
  213         splx(opri);
  214 
  215         if (error) {
  216                 bt_pci_release_resources(dev);
  217                 return (error);
  218         }
  219 
  220         return (0);
  221 }
  222 
  223 static device_method_t bt_pci_methods[] = {
  224         /* Device interface */
  225         DEVMETHOD(device_probe,         bt_pci_probe),
  226         DEVMETHOD(device_attach,        bt_pci_attach),
  227 
  228         { 0, 0 }
  229 };
  230 
  231 static driver_t bt_pci_driver = {
  232         "bt",
  233         bt_pci_methods,
  234         sizeof(struct bt_softc),
  235 };
  236 
  237 static devclass_t bt_devclass;
  238 
  239 DRIVER_MODULE(bt, pci, bt_pci_driver, bt_devclass, 0, 0);

Cache object: 94877b356916473f5e97191f8eace65c


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