sys/dev/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
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 #include <dev/aic7xxx/aic7xxx_osm.h>
  38
  39 static int ahc_pci_probe(device_t dev);
  40 static int ahc_pci_attach(device_t dev);
  41
  42 static device_method_t ahc_pci_device_methods[] = {
  43         /* Device interface */
  44         DEVMETHOD(device_probe,         ahc_pci_probe),
  45         DEVMETHOD(device_attach,        ahc_pci_attach),
  46         DEVMETHOD(device_detach,        ahc_detach),
  47         { 0, 0 }
  48 };
  49
  50 static driver_t ahc_pci_driver = {
  51         "ahc",
  52         ahc_pci_device_methods,
  53         sizeof(struct ahc_softc)
  54 };
  55
  56 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, ahc_devclass, 0, 0);
  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 = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
  91         if (name == NULL)
  92                 return (ENOMEM);
  93         strcpy(name, device_get_nameunit(dev));
  94         ahc = ahc_alloc(dev, name);
  95         if (ahc == NULL)
  96                 return (ENOMEM);
  97
  98         ahc_set_unit(ahc, device_get_unit(dev));
  99
 100         /*
 101          * Should we bother disabling 39Bit addressing
 102          * based on installed memory?
 103          */
 104         if (sizeof(bus_addr_t) > 4)
 105                 ahc->flags |= AHC_39BIT_ADDRESSING;
 106
 107         /* Allocate a dmatag for our SCB DMA maps */
 108         /* XXX Should be a child of the PCI bus dma tag */
 109         error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev),
 110                                    /*alignment*/1, /*boundary*/0,
 111                                    (ahc->flags & AHC_39BIT_ADDRESSING)
 112                                    ? 0x7FFFFFFFFFLL
 113                                    : BUS_SPACE_MAXADDR_32BIT,
 114                                    /*highaddr*/BUS_SPACE_MAXADDR,
 115                                    /*filter*/NULL, /*filterarg*/NULL,
 116                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
 117                                    /*nsegments*/AHC_NSEG,
 118                                    /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
 119                                    /*flags*/0,
 120                                    &ahc->parent_dmat);
 121
 122         if (error != 0) {
 123                 printf("ahc_pci_attach: Could not allocate DMA tag "
 124                        "- error %d\n", error);
 125                 ahc_free(ahc);
 126                 return (ENOMEM);
 127         }
 128         ahc->dev_softc = dev;
 129         error = ahc_pci_config(ahc, entry);
 130         if (error != 0) {
 131                 ahc_free(ahc);
 132                 return (error);
 133         }
 134
 135         ahc_attach(ahc);
 136         return (0);
 137 }
 138
 139 int
 140 ahc_pci_map_registers(struct ahc_softc *ahc)
 141 {
 142         struct  resource *regs;
 143         u_int   command;
 144         int     regs_type;
 145         int     regs_id;
 146         int     allow_memio;
 147
 148         command = aic_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
 149         regs = NULL;
 150         regs_type = 0;
 151         regs_id = 0;
 152
 153         /* Retrieve the per-device 'allow_memio' hint */
 154         if (resource_int_value(device_get_name(ahc->dev_softc),
 155                                device_get_unit(ahc->dev_softc),
 156                                "allow_memio", &allow_memio) != 0) {
 157                 if (bootverbose)
 158                         device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
 159 #ifdef AHC_ALLOW_MEMIO
 160                 if (bootverbose)
 161                         printf("on\n");
 162                 allow_memio = 1;
 163 #else
 164                 if (bootverbose)
 165                         printf("off\n");
 166                 allow_memio = 0;
 167 #endif
 168         }
 169
 170         if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {
 171
 172                 regs_type = SYS_RES_MEMORY;
 173                 regs_id = AHC_PCI_MEMADDR;
 174                 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
 175                                               &regs_id, RF_ACTIVE);
 176                 if (regs != NULL) {
 177                         ahc->tag = rman_get_bustag(regs);
 178                         ahc->bsh = rman_get_bushandle(regs);
 179
 180                         /*
 181                          * Do a quick test to see if memory mapped
 182                          * I/O is functioning correctly.
 183                          */
 184                         if (ahc_pci_test_register_access(ahc) != 0) {
 185                                 device_printf(ahc->dev_softc,
 186                                        "PCI Device %d:%d:%d failed memory "
 187                                        "mapped test.  Using PIO.\n",
 188                                        aic_get_pci_bus(ahc->dev_softc),
 189                                        aic_get_pci_slot(ahc->dev_softc),
 190                                        aic_get_pci_function(ahc->dev_softc));
 191                                 bus_release_resource(ahc->dev_softc, regs_type,
 192                                                      regs_id, regs);
 193                                 regs = NULL;
 194                         } else {
 195                                 command &= ~PCIM_CMD_PORTEN;
 196                                 aic_pci_write_config(ahc->dev_softc,
 197                                                      PCIR_COMMAND,
 198                                                      command, /*bytes*/1);
 199                         }
 200                 }
 201         }
 202
 203         if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
 204                 regs_type = SYS_RES_IOPORT;
 205                 regs_id = AHC_PCI_IOADDR;
 206                 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
 207                                               &regs_id, RF_ACTIVE);
 208                 if (regs != NULL) {
 209                         ahc->tag = rman_get_bustag(regs);
 210                         ahc->bsh = rman_get_bushandle(regs);
 211                         if (ahc_pci_test_register_access(ahc) != 0) {
 212                                 device_printf(ahc->dev_softc,
 213                                        "PCI Device %d:%d:%d failed I/O "
 214                                        "mapped test.\n",
 215                                        aic_get_pci_bus(ahc->dev_softc),
 216                                        aic_get_pci_slot(ahc->dev_softc),
 217                                        aic_get_pci_function(ahc->dev_softc));
 218                                 bus_release_resource(ahc->dev_softc, regs_type,
 219                                                      regs_id, regs);
 220                                 regs = NULL;
 221                         } else {
 222                                 command &= ~PCIM_CMD_MEMEN;
 223                                 aic_pci_write_config(ahc->dev_softc,
 224                                                      PCIR_COMMAND,
 225                                                      command, /*bytes*/1);
 226                         }
 227                 }
 228         }
 229         if (regs == NULL) {
 230                 device_printf(ahc->dev_softc,
 231                               "can't allocate register resources\n");
 232                 return (ENOMEM);
 233         }
 234         ahc->platform_data->regs_res_type = regs_type;
 235         ahc->platform_data->regs_res_id = regs_id;
 236         ahc->platform_data->regs = regs;
 237         return (0);
 238 }