sys/dev/disk/aic7xxx/ahc_pci.c

   1 /*
   2  * FreeBSD, PCI product support functions
   3  *
   4  * Copyright (c) 1995-2001 Justin T. Gibbs
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification, immediately at the beginning of the file.
  13  * 2. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * Alternatively, this software may be distributed under the terms of the
  17  * GNU Public License ("GPL").
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahc_pci.c#19 $
  32  *
  33  * $FreeBSD: src/sys/dev/aic7xxx/ahc_pci.c,v 1.64 2005/03/05 19:24:22 imp Exp $
  34  */
  35
  36 #include "aic7xxx_osm.h"
  37
  38 static int ahc_pci_probe(device_t dev);
  39 static int ahc_pci_attach(device_t dev);
  40
  41 static device_method_t ahc_pci_device_methods[] = {
  42         /* Device interface */
  43         DEVMETHOD(device_probe,         ahc_pci_probe),
  44         DEVMETHOD(device_attach,        ahc_pci_attach),
  45         DEVMETHOD(device_detach,        ahc_detach),
  46         { 0, 0 }
  47 };
  48
  49 static driver_t ahc_pci_driver = {
  50         "ahc",
  51         ahc_pci_device_methods,
  52         sizeof(struct ahc_softc)
  53 };
  54
  55 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, ahc_devclass, NULL, NULL);
  56 DRIVER_MODULE(ahc_pci, cardbus, ahc_pci_driver, ahc_devclass, NULL, NULL);
  57 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1);
  58 MODULE_VERSION(ahc_pci, 1);
  59
  60 static int
  61 ahc_pci_probe(device_t dev)
  62 {
  63         struct  ahc_pci_identity *entry;
  64
  65         entry = ahc_find_pci_device(dev);
  66         if (entry != NULL) {
  67                 device_set_desc(dev, entry->name);
  68                 return (BUS_PROBE_DEFAULT);
  69         }
  70         return (ENXIO);
  71 }
  72
  73 static int
  74 ahc_pci_attach(device_t dev)
  75 {
  76         struct   ahc_pci_identity *entry;
  77         struct   ahc_softc *ahc;
  78         char    *name;
  79         int      error;
  80
  81         entry = ahc_find_pci_device(dev);
  82         if (entry == NULL)
  83                 return (ENXIO);
  84
  85         /*
  86          * Allocate a softc for this card and
  87          * set it up for attachment by our
  88          * common detect routine.
  89          */
  90         name = kmalloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_INTWAIT);
  91         strcpy(name, device_get_nameunit(dev));
  92         ahc = ahc_alloc(dev, name);
  93         if (ahc == NULL)
  94                 return (ENOMEM);
  95
  96         ahc_set_unit(ahc, device_get_unit(dev));
  97
  98         /*
  99          * Should we bother disabling 39Bit addressing
 100          * based on installed memory?
 101          */
 102         if (sizeof(bus_addr_t) > 4)
 103                 ahc->flags |= AHC_39BIT_ADDRESSING;
 104
 105         /* Allocate a dmatag for our SCB DMA maps */
 106         /* XXX Should be a child of the PCI bus dma tag */
 107         error = aic_dma_tag_create(ahc, /*parent*/NULL, /*alignment*/1,
 108                                    /*boundary*/0,
 109                                    (ahc->flags & AHC_39BIT_ADDRESSING)
 110                                    ? 0x7FFFFFFFFFULL
 111                                    : BUS_SPACE_MAXADDR_32BIT,
 112                                    /*highaddr*/BUS_SPACE_MAXADDR,
 113                                    /*filter*/NULL, /*filterarg*/NULL,
 114                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
 115                                    /*nsegments*/AHC_NSEG,
 116                                    /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
 117                                    /*flags*/0,
 118                                    &ahc->parent_dmat);
 119
 120         if (error != 0) {
 121                 kprintf("ahc_pci_attach: Could not allocate DMA tag "
 122                        "- error %d\n", error);
 123                 ahc_free(ahc);
 124                 return (ENOMEM);
 125         }
 126         ahc->dev_softc = dev;
 127         error = ahc_pci_config(ahc, entry);
 128         if (error != 0) {
 129                 ahc_free(ahc);
 130                 return (error);
 131         }
 132
 133         ahc_attach(ahc);
 134         return (0);
 135 }
 136
 137 int
 138 ahc_pci_map_registers(struct ahc_softc *ahc)
 139 {
 140         struct  resource *regs;
 141         u_int   command;
 142         int     regs_type;
 143         int     regs_id;
 144         int     allow_memio;
 145
 146         command = aic_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
 147         regs = NULL;
 148         regs_type = 0;
 149         regs_id = 0;
 150
 151         /* Retrieve the per-device 'allow_memio' hint */
 152         if (resource_int_value(device_get_name(ahc->dev_softc),
 153                                device_get_unit(ahc->dev_softc),
 154                                "allow_memio", &allow_memio) != 0) {
 155                 if (bootverbose)
 156                         device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
 157 #ifdef AHC_ALLOW_MEMIO
 158                 if (bootverbose)
 159                         kprintf("on\n");
 160                 allow_memio = 1;
 161 #else
 162                 if (bootverbose)
 163                         kprintf("off\n");
 164                 allow_memio = 0;
 165 #endif
 166         }
 167
 168         if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {
 169
 170                 regs_type = SYS_RES_MEMORY;
 171                 regs_id = AHC_PCI_MEMADDR;
 172                 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
 173                                               &regs_id, RF_ACTIVE);
 174                 if (regs != NULL) {
 175                         ahc->tag = rman_get_bustag(regs);
 176                         ahc->bsh = rman_get_bushandle(regs);
 177
 178                         /*
 179                          * Do a quick test to see if memory mapped
 180                          * I/O is functioning correctly.
 181                          */
 182                         if (ahc_pci_test_register_access(ahc) != 0) {
 183                                 device_printf(ahc->dev_softc,
 184                                        "PCI Device %d:%d:%d failed memory "
 185                                        "mapped test.  Using PIO.\n",
 186                                        aic_get_pci_bus(ahc->dev_softc),
 187                                        aic_get_pci_slot(ahc->dev_softc),
 188                                        aic_get_pci_function(ahc->dev_softc));
 189                                 bus_release_resource(ahc->dev_softc, regs_type,
 190                                                      regs_id, regs);
 191                                 regs = NULL;
 192                         } else {
 193                                 command &= ~PCIM_CMD_PORTEN;
 194                                 aic_pci_write_config(ahc->dev_softc,
 195                                                      PCIR_COMMAND,
 196                                                      command, /*bytes*/1);
 197                         }
 198                 }
 199         }
 200
 201         if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
 202                 regs_type = SYS_RES_IOPORT;
 203                 regs_id = AHC_PCI_IOADDR;
 204                 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
 205                                               &regs_id, RF_ACTIVE);
 206                 if (regs != NULL) {
 207                         ahc->tag = rman_get_bustag(regs);
 208                         ahc->bsh = rman_get_bushandle(regs);
 209                         if (ahc_pci_test_register_access(ahc) != 0) {
 210                                 device_printf(ahc->dev_softc,
 211                                        "PCI Device %d:%d:%d failed I/O "
 212                                        "mapped test.\n",
 213                                        aic_get_pci_bus(ahc->dev_softc),
 214                                        aic_get_pci_slot(ahc->dev_softc),
 215                                        aic_get_pci_function(ahc->dev_softc));
 216                                 bus_release_resource(ahc->dev_softc, regs_type,
 217                                                      regs_id, regs);
 218                                 regs = NULL;
 219                         } else {
 220                                 command &= ~PCIM_CMD_MEMEN;
 221                                 aic_pci_write_config(ahc->dev_softc,
 222                                                      PCIR_COMMAND,
 223                                                      command, /*bytes*/1);
 224                         }
 225                 }
 226         }
 227         if (regs == NULL) {
 228                 device_printf(ahc->dev_softc,
 229                               "can't allocate register resources\n");
 230                 return (ENOMEM);
 231         }
 232         ahc->platform_data->regs_res_type = regs_type;
 233         ahc->platform_data->regs_res_id = regs_id;
 234         ahc->platform_data->regs = regs;
 235         return (0);
 236 }
 237