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  * $FreeBSD$
   30  */
   31 
   32 #include "pci.h"
   33 #if NPCI > 0
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 
   38 #include <pci/pcireg.h>
   39 #include <pci/pcivar.h>
   40 
   41 #include <machine/bus_memio.h>
   42 #include <machine/bus_pio.h>
   43 #include <machine/bus.h>
   44 
   45 #include <dev/buslogic/btreg.h>
   46 
   47 #define BT_PCI_IOADDR   PCIR_MAPS
   48 #define BT_PCI_MEMADDR  PCIR_MAPS + 4
   49 
   50 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER      0x1040104Bul
   51 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC   0x0140104Bul
   52 #define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT       0x8130104Bul
   53 
   54 static int btpcideterminebusspace(pcici_t config_id, bus_space_tag_t* tagp,
   55                                   bus_space_handle_t* bshp);
   56 static const char* bt_pci_probe(pcici_t tag, pcidi_t type);
   57 static void bt_pci_attach(pcici_t config_id, int unit);
   58 
   59 static struct  pci_device bt_pci_driver = {
   60         "bt",
   61         bt_pci_probe,
   62         bt_pci_attach,
   63         &bt_unit,
   64         NULL
   65 };
   66 
   67 DATA_SET (pcidevice_set, bt_pci_driver);
   68 
   69 static int
   70 btpcideterminebusspace(pcici_t config_id, bus_space_tag_t* tagp,
   71                        bus_space_handle_t* bshp)
   72 {
   73         vm_offset_t     vaddr;
   74         vm_offset_t     paddr;
   75         u_int16_t       io_port;
   76         int             command;
   77 
   78         vaddr = 0;
   79         paddr = 0;
   80         command = pci_cfgread(config_id, PCIR_COMMAND, /*bytes*/1);
   81         /* XXX Memory Mapped I/O seems to cause problems */
   82 #if 0
   83         if ((command & PCIM_CMD_MEMEN) == 0
   84          || (pci_map_mem(config_id, BT_PCI_MEMADDR, &vaddr, &paddr)) == 0)
   85 #endif
   86                 if ((command & PCIM_CMD_PORTEN) == 0
   87                  || (pci_map_port(config_id, BT_PCI_IOADDR, &io_port)) == 0)
   88                         return (-1);
   89 
   90         if (vaddr != 0) {
   91                 *tagp = I386_BUS_SPACE_MEM;
   92                 *bshp = vaddr;
   93         } else {
   94                 *tagp = I386_BUS_SPACE_IO;
   95                 *bshp = io_port;
   96         }
   97 
   98         return (0);
   99 }
  100 
  101 static const char*
  102 bt_pci_probe (pcici_t config_id, pcidi_t type)
  103 {
  104         switch(type) {
  105                 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER:
  106                 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC:
  107                 {
  108                         struct bt_softc   *bt;
  109                         bus_space_tag_t    tag;
  110                         bus_space_handle_t bsh;
  111                         pci_info_data_t pci_info;
  112                         int error;
  113 
  114                         if (btpcideterminebusspace(config_id, &tag, &bsh) != 0)
  115                                 break;
  116 
  117                         bt = bt_alloc(BT_TEMP_UNIT, tag, bsh);
  118                         if (bt == NULL)
  119                                 break;
  120 
  121                         /*
  122                          * Determine if an ISA compatible I/O port has been
  123                          * enabled.  If so, record the port so it will not
  124                          * be probed by our ISA probe.  If the PCI I/O port
  125                          * was not set to the compatibility port, disable it.
  126                          */
  127                         error = bt_cmd(bt, BOP_INQUIRE_PCI_INFO,
  128                                        /*param*/NULL, /*paramlen*/0,
  129                                        (u_int8_t*)&pci_info, sizeof(pci_info),
  130                                        DEFAULT_CMD_TIMEOUT);
  131                         if (error == 0
  132                          && pci_info.io_port < BIO_DISABLED) {
  133                                 bt_mark_probed_bio(pci_info.io_port);
  134                                 if (bsh != bt_iop_from_bio(pci_info.io_port)) {
  135                                         u_int8_t new_addr;
  136 
  137                                         new_addr = BIO_DISABLED;
  138                                         bt_cmd(bt, BOP_MODIFY_IO_ADDR,
  139                                                /*param*/&new_addr,
  140                                                /*paramlen*/1, /*reply_buf*/NULL,
  141                                                /*reply_len*/0,
  142                                                DEFAULT_CMD_TIMEOUT);
  143                                 }
  144                         }
  145                         bt_free(bt);
  146                         return ("Buslogic Multi-Master SCSI Host Adapter");
  147                         break;
  148                 }
  149                 default:
  150                         break;
  151         }
  152 
  153         return (NULL);
  154 }
  155 
  156 static void
  157 bt_pci_attach(pcici_t config_id, int unit)
  158 {
  159         struct bt_softc   *bt;
  160         bus_space_tag_t    tag;
  161         bus_space_handle_t bsh;
  162         int                opri;
  163 
  164         if (btpcideterminebusspace(config_id, &tag, &bsh) != 0)
  165                 return;
  166 
  167         if ((bt = bt_alloc(unit, tag, bsh)) == NULL)
  168                 return;  /* XXX PCI code should take return status */
  169 
  170         /* Allocate a dmatag for our CCB DMA maps */
  171         /* XXX Should be a child of the PCI bus dma tag */
  172         if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
  173                                /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
  174                                /*highaddr*/BUS_SPACE_MAXADDR,
  175                                /*filter*/NULL, /*filterarg*/NULL,
  176                                /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
  177                                /*nsegments*/BUS_SPACE_UNRESTRICTED,
  178                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
  179                                /*flags*/0, &bt->parent_dmat) != 0) {
  180                 bt_free(bt);
  181                 return;
  182         }
  183 
  184         if ((pci_map_int(config_id, bt_intr, (void *)bt, &cam_imask)) == 0) {
  185                 bt_free(bt);
  186                 return;
  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(bt) || bt_fetch_adapter_info(bt) || bt_init(bt)) {
  199                 bt_free(bt);
  200                 splx(opri);
  201                 return; /* XXX PCI code should take return status */
  202         }
  203 
  204         bt_attach(bt);
  205 
  206         splx(opri);
  207         return;
  208 }
  209 
  210 #endif /* NPCI > 0 */

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FreeBSD/Linux Kernel Cross Reference sys/pci/bt_pci.c

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sys/pci/bt_pci.c