sys/dev/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
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  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.h>
  45 #include <machine/resource.h>
  46 #include <sys/rman.h>
  47
  48 #include <dev/buslogic/btreg.h>
  49
  50 #define BT_PCI_IOADDR   PCIR_BAR(0)
  51 #define BT_PCI_MEMADDR  PCIR_BAR(1)
  52
  53 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER      0x1040104Bul
  54 #define PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER_NC   0x0140104Bul
  55 #define PCI_DEVICE_ID_BUSLOGIC_FLASHPOINT       0x8130104Bul
  56
  57 static int
  58 bt_pci_alloc_resources(device_t dev)
  59 {
  60         int             command, type = 0, rid, zero;
  61         struct resource *regs = 0;
  62         struct resource *irq = 0;
  63
  64         command = pci_read_config(dev, PCIR_COMMAND, /*bytes*/1);
  65 #if 0
  66         /* XXX Memory Mapped I/O seems to cause problems */
  67         if (command & PCIM_CMD_MEMEN) {
  68                 type = SYS_RES_MEMORY;
  69                 rid = BT_PCI_MEMADDR;
  70                 regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
  71         }
  72 #else
  73         if (!regs && (command & PCIM_CMD_PORTEN)) {
  74                 type = SYS_RES_IOPORT;
  75                 rid = BT_PCI_IOADDR;
  76                 regs = bus_alloc_resource_any(dev, type, &rid, RF_ACTIVE);
  77         }
  78 #endif
  79         if (!regs)
  80                 return (ENOMEM);
  81
  82         zero = 0;
  83         irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero,
  84                                      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,
 177                                 /* alignemnt    */ 1,
 178                                 /* boundary     */ 0,
 179                                 /* lowaddr      */ BUS_SPACE_MAXADDR_32BIT,
 180                                 /* highaddr     */ BUS_SPACE_MAXADDR,
 181                                 /* filter       */ NULL,
 182                                 /* filterarg    */ NULL,
 183                                 /* maxsize      */ BUS_SPACE_MAXSIZE_32BIT,
 184                                 /* nsegments    */ ~0,
 185                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
 186                                 /* flags        */ 0,
 187                                 /* lockfunc     */ busdma_lock_mutex,
 188                                 /* lockarg      */ &Giant,
 189                                 &bt->parent_dmat) != 0) {
 190                 bt_pci_release_resources(dev);
 191                 return (ENOMEM);
 192         }
 193
 194         /*
 195          * Protect ourself from spurrious interrupts during
 196          * intialization and attach.  We should really rely
 197          * on interrupts during attach, but we don't have
 198          * access to our interrupts during ISA probes, so until
 199          * that changes, we mask our interrupts during attach
 200          * too.
 201          */
 202         opri = splcam();
 203
 204         if (bt_probe(dev) || bt_fetch_adapter_info(dev) || bt_init(dev)) {
 205                 bt_pci_release_resources(dev);
 206                 splx(opri);
 207                 return (ENXIO);
 208         }
 209
 210         error = bt_attach(dev);
 211         splx(opri);
 212
 213         if (error) {
 214                 bt_pci_release_resources(dev);
 215                 return (error);
 216         }
 217
 218         return (0);
 219 }
 220
 221 static device_method_t bt_pci_methods[] = {
 222         /* Device interface */
 223         DEVMETHOD(device_probe,         bt_pci_probe),
 224         DEVMETHOD(device_attach,        bt_pci_attach),
 225
 226         { 0, 0 }
 227 };
 228
 229 static driver_t bt_pci_driver = {
 230         "bt",
 231         bt_pci_methods,
 232         sizeof(struct bt_softc),
 233 };
 234
 235 static devclass_t bt_devclass;
 236
 237 DRIVER_MODULE(bt, pci, bt_pci_driver, bt_devclass, 0, 0);
 238 MODULE_DEPEND(bt, pci, 1, 1, 1);