ahd_pci.c

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    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/ahd_pci.c#17 $
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD: releng/8.0/sys/dev/aic7xxx/ahd_pci.c 189575 2009-03-09 13:23:54Z imp $");
   36 
   37 #include <dev/aic7xxx/aic79xx_osm.h>
   38 
   39 static int ahd_pci_probe(device_t dev);
   40 static int ahd_pci_attach(device_t dev);
   41 
   42 static device_method_t ahd_pci_device_methods[] = {
   43         /* Device interface */
   44         DEVMETHOD(device_probe,         ahd_pci_probe),
   45         DEVMETHOD(device_attach,        ahd_pci_attach),
   46         DEVMETHOD(device_detach,        ahd_detach),
   47         { 0, 0 }
   48 };
   49 
   50 static driver_t ahd_pci_driver = {
   51         "ahd",
   52         ahd_pci_device_methods,
   53         sizeof(struct ahd_softc)
   54 };
   55 
   56 static devclass_t ahd_devclass;
   57 
   58 DRIVER_MODULE(ahd, pci, ahd_pci_driver, ahd_devclass, 0, 0);
   59 MODULE_DEPEND(ahd_pci, ahd, 1, 1, 1);
   60 MODULE_VERSION(ahd_pci, 1);
   61 
   62 static int
   63 ahd_pci_probe(device_t dev)
   64 {
   65         struct  ahd_pci_identity *entry;
   66 
   67         entry = ahd_find_pci_device(dev);
   68         if (entry != NULL) {
   69                 device_set_desc(dev, entry->name);
   70                 return (BUS_PROBE_DEFAULT);
   71         }
   72         return (ENXIO);
   73 }
   74 
   75 static int
   76 ahd_pci_attach(device_t dev)
   77 {
   78         struct   ahd_pci_identity *entry;
   79         struct   ahd_softc *ahd;
   80         char    *name;
   81         int      error;
   82 
   83         entry = ahd_find_pci_device(dev);
   84         if (entry == NULL)
   85                 return (ENXIO);
   86 
   87         /*
   88          * Allocate a softc for this card and
   89          * set it up for attachment by our
   90          * common detect routine.
   91          */
   92         name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
   93         if (name == NULL)
   94                 return (ENOMEM);
   95         strcpy(name, device_get_nameunit(dev));
   96         ahd = ahd_alloc(dev, name);
   97         if (ahd == NULL)
   98                 return (ENOMEM);
   99 
  100         ahd_set_unit(ahd, device_get_unit(dev));
  101 
  102         /*
  103          * Should we bother disabling 39Bit addressing
  104          * based on installed memory?
  105          */
  106         if (sizeof(bus_addr_t) > 4)
  107                 ahd->flags |= AHD_39BIT_ADDRESSING;
  108 
  109         /* Allocate a dmatag for our SCB DMA maps */
  110         /* XXX Should be a child of the PCI bus dma tag */
  111         error = aic_dma_tag_create(ahd, /*parent*/bus_get_dma_tag(dev),
  112                                    /*alignment*/1, /*boundary*/0,
  113                                    (ahd->flags & AHD_39BIT_ADDRESSING)
  114                                    ? 0x7FFFFFFFFF
  115                                    : BUS_SPACE_MAXADDR_32BIT,
  116                                    /*highaddr*/BUS_SPACE_MAXADDR,
  117                                    /*filter*/NULL, /*filterarg*/NULL,
  118                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
  119                                    /*nsegments*/AHD_NSEG,
  120                                    /*maxsegsz*/AHD_MAXTRANSFER_SIZE,
  121                                    /*flags*/0,
  122                                    &ahd->parent_dmat);
  123 
  124         if (error != 0) {
  125                 printf("ahd_pci_attach: Could not allocate DMA tag "
  126                        "- error %d\n", error);
  127                 ahd_free(ahd);
  128                 return (ENOMEM);
  129         }
  130         ahd->dev_softc = dev;
  131         error = ahd_pci_config(ahd, entry);
  132         if (error != 0) {
  133                 ahd_free(ahd);
  134                 return (error);
  135         }
  136 
  137         ahd_attach(ahd);
  138         return (0);
  139 }
  140 
  141 int
  142 ahd_pci_map_registers(struct ahd_softc *ahd)
  143 {
  144         struct  resource *regs;
  145         struct  resource *regs2;
  146         u_int   command;
  147         int     regs_type;
  148         int     regs_id;
  149         int     regs_id2;
  150         int     allow_memio;
  151 
  152         command = aic_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
  153         regs = NULL;
  154         regs2 = NULL;
  155         regs_type = 0;
  156         regs_id = 0;
  157 
  158         /* Retrieve the per-device 'allow_memio' hint */
  159         if (resource_int_value(device_get_name(ahd->dev_softc),
  160                                device_get_unit(ahd->dev_softc),
  161                                "allow_memio", &allow_memio) != 0) {
  162                 if (bootverbose)
  163                         device_printf(ahd->dev_softc,
  164                                       "Defaulting to MEMIO on\n");
  165                 allow_memio = 1;
  166         }
  167 
  168         if ((command & PCIM_CMD_MEMEN) != 0
  169          && (ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0
  170          && allow_memio != 0) {
  171 
  172                 regs_type = SYS_RES_MEMORY;
  173                 regs_id = AHD_PCI_MEMADDR;
  174                 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
  175                                               &regs_id, RF_ACTIVE);
  176                 if (regs != NULL) {
  177                         int error;
  178 
  179                         ahd->tags[0] = rman_get_bustag(regs);
  180                         ahd->bshs[0] = rman_get_bushandle(regs);
  181                         ahd->tags[1] = ahd->tags[0];
  182                         error = bus_space_subregion(ahd->tags[0], ahd->bshs[0],
  183                                                     /*offset*/0x100,
  184                                                     /*size*/0x100,
  185                                                     &ahd->bshs[1]);
  186                         /*
  187                          * Do a quick test to see if memory mapped
  188                          * I/O is functioning correctly.
  189                          */
  190                         if (error != 0
  191                          || ahd_pci_test_register_access(ahd) != 0) {
  192                                 device_printf(ahd->dev_softc,
  193                                        "PCI Device %d:%d:%d failed memory "
  194                                        "mapped test.  Using PIO.\n",
  195                                        aic_get_pci_bus(ahd->dev_softc),
  196                                        aic_get_pci_slot(ahd->dev_softc),
  197                                        aic_get_pci_function(ahd->dev_softc));
  198                                 bus_release_resource(ahd->dev_softc, regs_type,
  199                                                      regs_id, regs);
  200                                 regs = NULL;
  201                         } else {
  202                                 command &= ~PCIM_CMD_PORTEN;
  203                                 aic_pci_write_config(ahd->dev_softc,
  204                                                      PCIR_COMMAND,
  205                                                      command, /*bytes*/1);
  206                         }
  207                 }
  208         }
  209         if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
  210                 regs_type = SYS_RES_IOPORT;
  211                 regs_id = AHD_PCI_IOADDR0;
  212                 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
  213                                               &regs_id, RF_ACTIVE);
  214                 if (regs == NULL) {
  215                         device_printf(ahd->dev_softc,
  216                                       "can't allocate register resources\n");
  217                         return (ENOMEM);
  218                 }
  219                 ahd->tags[0] = rman_get_bustag(regs);
  220                 ahd->bshs[0] = rman_get_bushandle(regs);
  221 
  222                 /* And now the second BAR */
  223                 regs_id2 = AHD_PCI_IOADDR1;
  224                 regs2 = bus_alloc_resource_any(ahd->dev_softc, regs_type,
  225                                                &regs_id2, RF_ACTIVE);
  226                 if (regs2 == NULL) {
  227                         device_printf(ahd->dev_softc,
  228                                       "can't allocate register resources\n");
  229                         return (ENOMEM);
  230                 }
  231                 ahd->tags[1] = rman_get_bustag(regs2);
  232                 ahd->bshs[1] = rman_get_bushandle(regs2);
  233                 command &= ~PCIM_CMD_MEMEN;
  234                 aic_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
  235                                      command, /*bytes*/1);
  236                 ahd->platform_data->regs_res_type[1] = regs_type;
  237                 ahd->platform_data->regs_res_id[1] = regs_id2;
  238                 ahd->platform_data->regs[1] = regs2;
  239         }
  240         ahd->platform_data->regs_res_type[0] = regs_type;
  241         ahd->platform_data->regs_res_id[0] = regs_id;
  242         ahd->platform_data->regs[0] = regs;
  243         return (0);
  244 }
  245 
  246 int
  247 ahd_pci_map_int(struct ahd_softc *ahd)
  248 {
  249         int zero;
  250 
  251         zero = 0;
  252         ahd->platform_data->irq =
  253             bus_alloc_resource_any(ahd->dev_softc, SYS_RES_IRQ, &zero,
  254                                    RF_ACTIVE | RF_SHAREABLE);
  255         if (ahd->platform_data->irq == NULL)
  256                 return (ENOMEM);
  257         ahd->platform_data->irq_res_type = SYS_RES_IRQ;
  258         return (ahd_map_int(ahd));
  259 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/aic7xxx/ahd_pci.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/aic7xxx/ahd_pci.c
