sys/dev/disk/aic7xxx/ahd_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/ahd_pci.c#17 $
  32  *
  33  * $FreeBSD: src/sys/dev/aic7xxx/ahd_pci.c,v 1.19 2005/09/22 04:56:59 gibbs Exp $
  34  */
  35
  36 #include "aic79xx_osm.h"
  37
  38 static int ahd_pci_probe(device_t dev);
  39 static int ahd_pci_attach(device_t dev);
  40
  41 static device_method_t ahd_pci_device_methods[] = {
  42         /* Device interface */
  43         DEVMETHOD(device_probe,         ahd_pci_probe),
  44         DEVMETHOD(device_attach,        ahd_pci_attach),
  45         DEVMETHOD(device_detach,        ahd_detach),
  46         { 0, 0 }
  47 };
  48
  49 static driver_t ahd_pci_driver = {
  50         "ahd",
  51         ahd_pci_device_methods,
  52         sizeof(struct ahd_softc)
  53 };
  54
  55 static devclass_t ahd_devclass;
  56
  57 DRIVER_MODULE(ahd, pci, ahd_pci_driver, ahd_devclass, NULL, NULL);
  58 DRIVER_MODULE(ahd, cardbus, ahd_pci_driver, ahd_devclass, NULL, NULL);
  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 = kmalloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_INTWAIT);
  93         strcpy(name, device_get_nameunit(dev));
  94         ahd = ahd_alloc(dev, name);
  95         if (ahd == NULL)
  96                 return (ENOMEM);
  97
  98         ahd_set_unit(ahd, 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                 ahd->flags |= AHD_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(ahd, /*parent*/NULL, /*alignment*/1,
 110                                    /*boundary*/0,
 111                                    (ahd->flags & AHD_39BIT_ADDRESSING)
 112                                    ? 0x7FFFFFFFFFULL
 113                                    : BUS_SPACE_MAXADDR_32BIT,
 114                                    /*highaddr*/BUS_SPACE_MAXADDR,
 115                                    /*filter*/NULL, /*filterarg*/NULL,
 116                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
 117                                    /*nsegments*/AHD_NSEG,
 118                                    /*maxsegsz*/AHD_MAXTRANSFER_SIZE,
 119                                    /*flags*/0,
 120                                    &ahd->parent_dmat);
 121
 122         if (error != 0) {
 123                 kprintf("ahd_pci_attach: Could not allocate DMA tag "
 124                        "- error %d\n", error);
 125                 ahd_free(ahd);
 126                 return (ENOMEM);
 127         }
 128         ahd->dev_softc = dev;
 129         error = ahd_pci_config(ahd, entry);
 130         if (error != 0) {
 131                 ahd_free(ahd);
 132                 return (error);
 133         }
 134
 135         ahd_attach(ahd);
 136         return (0);
 137 }
 138
 139 int
 140 ahd_pci_map_registers(struct ahd_softc *ahd)
 141 {
 142         struct  resource *regs;
 143         struct  resource *regs2;
 144         u_int   command;
 145         int     regs_type;
 146         int     regs_id;
 147         int     regs_id2;
 148         int     allow_memio;
 149
 150         command = aic_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
 151         regs = NULL;
 152         regs2 = NULL;
 153         regs_type = 0;
 154         regs_id = 0;
 155
 156         /* Retrieve the per-device 'allow_memio' hint */
 157         if (resource_int_value(device_get_name(ahd->dev_softc),
 158                                device_get_unit(ahd->dev_softc),
 159                                "allow_memio", &allow_memio) != 0) {
 160                 if (bootverbose)
 161                         device_printf(ahd->dev_softc,
 162                                       "Defaulting to MEMIO on\n");
 163                 allow_memio = 1;
 164         }
 165
 166         if ((command & PCIM_CMD_MEMEN) != 0
 167          && (ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0
 168          && allow_memio != 0) {
 169
 170                 regs_type = SYS_RES_MEMORY;
 171                 regs_id = AHD_PCI_MEMADDR;
 172                 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
 173                                               &regs_id, RF_ACTIVE);
 174                 if (regs != NULL) {
 175                         int error;
 176
 177                         ahd->tags[0] = rman_get_bustag(regs);
 178                         ahd->bshs[0] = rman_get_bushandle(regs);
 179                         ahd->tags[1] = ahd->tags[0];
 180                         error = bus_space_subregion(ahd->tags[0], ahd->bshs[0],
 181                                                     /*offset*/0x100,
 182                                                     /*size*/0x100,
 183                                                     &ahd->bshs[1]);
 184                         /*
 185                          * Do a quick test to see if memory mapped
 186                          * I/O is functioning correctly.
 187                          */
 188                         if (error != 0
 189                          || ahd_pci_test_register_access(ahd) != 0) {
 190                                 device_printf(ahd->dev_softc,
 191                                        "PCI Device %d:%d:%d failed memory "
 192                                        "mapped test.  Using PIO.\n",
 193                                        aic_get_pci_bus(ahd->dev_softc),
 194                                        aic_get_pci_slot(ahd->dev_softc),
 195                                        aic_get_pci_function(ahd->dev_softc));
 196                                 bus_release_resource(ahd->dev_softc, regs_type,
 197                                                      regs_id, regs);
 198                                 regs = NULL;
 199                         } else {
 200                                 command &= ~PCIM_CMD_PORTEN;
 201                                 aic_pci_write_config(ahd->dev_softc,
 202                                                      PCIR_COMMAND,
 203                                                      command, /*bytes*/1);
 204                         }
 205                 }
 206         }
 207         if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
 208                 regs_type = SYS_RES_IOPORT;
 209                 regs_id = AHD_PCI_IOADDR0;
 210                 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
 211                                               &regs_id, RF_ACTIVE);
 212                 if (regs == NULL) {
 213                         device_printf(ahd->dev_softc,
 214                                       "can't allocate register resources\n");
 215                         return (ENOMEM);
 216                 }
 217                 ahd->tags[0] = rman_get_bustag(regs);
 218                 ahd->bshs[0] = rman_get_bushandle(regs);
 219
 220                 /* And now the second BAR */
 221                 regs_id2 = AHD_PCI_IOADDR1;
 222                 regs2 = bus_alloc_resource_any(ahd->dev_softc, regs_type,
 223                                                &regs_id2, RF_ACTIVE);
 224                 if (regs2 == NULL) {
 225                         device_printf(ahd->dev_softc,
 226                                       "can't allocate register resources\n");
 227                         return (ENOMEM);
 228                 }
 229                 ahd->tags[1] = rman_get_bustag(regs2);
 230                 ahd->bshs[1] = rman_get_bushandle(regs2);
 231                 command &= ~PCIM_CMD_MEMEN;
 232                 aic_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 233                                      command, /*bytes*/1);
 234                 ahd->platform_data->regs_res_type[1] = regs_type;
 235                 ahd->platform_data->regs_res_id[1] = regs_id2;
 236                 ahd->platform_data->regs[1] = regs2;
 237         }
 238         ahd->platform_data->regs_res_type[0] = regs_type;
 239         ahd->platform_data->regs_res_id[0] = regs_id;
 240         ahd->platform_data->regs[0] = regs;
 241         return (0);
 242 }
 243
 244 int
 245 ahd_pci_map_int(struct ahd_softc *ahd)
 246 {
 247         int zero;
 248
 249         zero = 0;
 250         ahd->platform_data->irq =
 251             bus_alloc_resource_any(ahd->dev_softc, SYS_RES_IRQ, &zero,
 252                                    RF_ACTIVE | RF_SHAREABLE);
 253         if (ahd->platform_data->irq == NULL)
 254                 return (ENOMEM);
 255         ahd->platform_data->irq_res_type = SYS_RES_IRQ;
 256         return (ahd_map_int(ahd));
 257 }