sys/dev/disk/buslogic/bt_pci.c

   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: src/sys/dev/buslogic/bt_pci.c,v 1.11 2000/01/17 12:38:00 nyan Exp $
  30  */
  31
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/kernel.h>
  35 #include <sys/bus.h>
  36 #include <sys/rman.h>
  37 #include <sys/thread2.h>
  38
  39 #include <bus/pci/pcireg.h>
  40 #include <bus/pci/pcivar.h>
  41
  42 #include "btreg.h"
  43
  44 #define BT_PCI_IOADDR   PCIR_MAPS
  45 #define BT_PCI_MEMADDR  PCIR_MAPS + 4
  46
  47 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER      0x1040104Bul
  48 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC   0x0140104Bul
  49 #define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT       0x8130104Bul
  50
  51 static int
  52 bt_pci_alloc_resources(device_t dev)
  53 {
  54         int             command, type = 0, rid, zero;
  55         struct resource *regs = NULL;
  56         struct resource *irq = NULL;
  57
  58         command = pci_read_config(dev, PCIR_COMMAND, /*bytes*/1);
  59 #if 0
  60         /* XXX Memory Mapped I/O seems to cause problems */
  61         if (command & PCIM_CMD_MEMEN) {
  62                 type = SYS_RES_MEMORY;
  63                 rid = BT_PCI_MEMADDR;
  64                 regs = bus_alloc_resource(dev, type, &rid,
  65                                           0, ~0, 1, RF_ACTIVE);
  66         }
  67 #else
  68         if (!regs && (command & PCIM_CMD_PORTEN)) {
  69                 type = SYS_RES_IOPORT;
  70                 rid = BT_PCI_IOADDR;
  71                 regs = bus_alloc_resource(dev, type, &rid,
  72                                           0, ~0, 1, RF_ACTIVE);
  73         }
  74 #endif
  75         if (!regs)
  76                 return (ENOMEM);
  77
  78         zero = 0;
  79         irq = bus_alloc_resource(dev, SYS_RES_IRQ, &zero,
  80                                  0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
  81         if (!irq) {
  82                 bus_release_resource(dev, type, rid, regs);
  83                 return (ENOMEM);
  84         }
  85
  86         bt_init_softc(dev, regs, irq, 0);
  87
  88         return (0);
  89 }
  90
  91 static void
  92 bt_pci_release_resources(device_t dev)
  93 {
  94         struct bt_softc *bt = device_get_softc(dev);
  95
  96         if (bt->port)
  97                 /* XXX can't cope with memory registers anyway */
  98                 bus_release_resource(dev, SYS_RES_IOPORT,
  99                                      BT_PCI_IOADDR, bt->port);
 100         if (bt->irq)
 101                 bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq);
 102         bt_free_softc(dev);
 103 }
 104
 105 static int
 106 bt_pci_probe(device_t dev)
 107 {
 108         switch (pci_get_devid(dev)) {
 109                 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER:
 110                 case PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC:
 111                 {
 112                         struct bt_softc   *bt = device_get_softc(dev);
 113                         pci_info_data_t pci_info;
 114                         int error;
 115
 116                         error = bt_pci_alloc_resources(dev);
 117                         if (error)
 118                                 return (error);
 119
 120                         /*
 121                          * Determine if an ISA compatible I/O port has been
 122                          * enabled.  If so, record the port so it will not
 123                          * be probed by our ISA probe.  If the PCI I/O port
 124                          * was not set to the compatibility port, disable it.
 125                          */
 126                         error = bt_cmd(bt, BOP_INQUIRE_PCI_INFO,
 127                                        /*param*/NULL, /*paramlen*/0,
 128                                        (u_int8_t*)&pci_info, sizeof(pci_info),
 129                                        DEFAULT_CMD_TIMEOUT);
 130                         if (error == 0
 131                          && pci_info.io_port < BIO_DISABLED) {
 132                                 bt_mark_probed_bio(pci_info.io_port);
 133                                 if (rman_get_start(bt->port) !=
 134                                     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_pci_release_resources(dev);
 146                         device_set_desc(dev, "Buslogic Multi-Master SCSI Host Adapter");
 147                         return (0);
 148                 }
 149                 default:
 150                         break;
 151         }
 152
 153         return (ENXIO);
 154 }
 155
 156 static int
 157 bt_pci_attach(device_t dev)
 158 {
 159         struct bt_softc   *bt = device_get_softc(dev);
 160         int                error;
 161
 162         /* Initialize softc */
 163         error = bt_pci_alloc_resources(dev);
 164         if (error) {
 165                 device_printf(dev, "can't allocate resources in bt_pci_attach\n");
 166                 return error;
 167         }
 168
 169         /* Allocate a dmatag for our CCB DMA maps */
 170         /* XXX Should be a child of the PCI bus dma tag */
 171         if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
 172                                /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
 173                                /*highaddr*/BUS_SPACE_MAXADDR,
 174                                /*filter*/NULL, /*filterarg*/NULL,
 175                                /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
 176                                /*nsegments*/BUS_SPACE_UNRESTRICTED,
 177                                /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
 178                                /*flags*/0, &bt->parent_dmat) != 0) {
 179                 bt_pci_release_resources(dev);
 180                 return (ENOMEM);
 181         }
 182
 183         /*
 184          * Protect ourself from spurrious interrupts during
 185          * intialization and attach.  We should really rely
 186          * on interrupts during attach, but we don't have
 187          * access to our interrupts during ISA probes, so until
 188          * that changes, we mask our interrupts during attach
 189          * too.
 190          */
 191         crit_enter();
 192
 193         if (bt_probe(dev) || bt_fetch_adapter_info(dev) || bt_init(dev)) {
 194                 bt_pci_release_resources(dev);
 195                 crit_exit();
 196                 return (ENXIO);
 197         }
 198
 199         error = bt_attach(dev);
 200         crit_exit();
 201
 202         if (error) {
 203                 bt_pci_release_resources(dev);
 204                 return (error);
 205         }
 206
 207         return (0);
 208 }
 209
 210 static device_method_t bt_pci_methods[] = {
 211         /* Device interface */
 212         DEVMETHOD(device_probe,         bt_pci_probe),
 213         DEVMETHOD(device_attach,        bt_pci_attach),
 214
 215         { 0, 0 }
 216 };
 217
 218 static driver_t bt_pci_driver = {
 219         "bt",
 220         bt_pci_methods,
 221         sizeof(struct bt_softc),
 222 };
 223
 224 static devclass_t bt_devclass;
 225
 226 DRIVER_MODULE(bt, pci, bt_pci_driver, bt_devclass, NULL, NULL);