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 1.60 2003/12/17 00:02:09 gibbs Exp $
  34  * $DragonFly: src/sys/dev/disk/aic7xxx/ahc_pci.c,v 1.10 2007/07/06 00:01:16 pavalos Exp $
  35  */
  36
  37 #include "aic7xxx_osm.h"
  38
  39 #ifdef AHC_PCI_CONFIG
  40
  41 static int ahc_pci_probe(device_t dev);
  42 static int ahc_pci_attach(device_t dev);
  43
  44 static device_method_t ahc_pci_device_methods[] = {
  45         /* Device interface */
  46         DEVMETHOD(device_probe,         ahc_pci_probe),
  47         DEVMETHOD(device_attach,        ahc_pci_attach),
  48         DEVMETHOD(device_detach,        ahc_detach),
  49         { 0, 0 }
  50 };
  51
  52 static driver_t ahc_pci_driver = {
  53         "ahc",
  54         ahc_pci_device_methods,
  55         sizeof(struct ahc_softc)
  56 };
  57
  58 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, ahc_devclass, 0, 0);
  59 DRIVER_MODULE(ahc_pci, cardbus, ahc_pci_driver, ahc_devclass, 0, 0);
  60 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1);
  61 MODULE_VERSION(ahc_pci, 1);
  62
  63 static int
  64 ahc_pci_probe(device_t dev)
  65 {
  66         struct  ahc_pci_identity *entry;
  67
  68         entry = ahc_find_pci_device(dev);
  69         if (entry != NULL) {
  70                 device_set_desc(dev, entry->name);
  71                 return (0);
  72         }
  73         return (ENXIO);
  74 }
  75
  76 static int
  77 ahc_pci_attach(device_t dev)
  78 {
  79         struct   ahc_pci_identity *entry;
  80         struct   ahc_softc *ahc;
  81         char    *name;
  82         int      error;
  83
  84         entry = ahc_find_pci_device(dev);
  85         if (entry == NULL)
  86                 return (ENXIO);
  87
  88         /*
  89          * Allocate a softc for this card and
  90          * set it up for attachment by our
  91          * common detect routine.
  92          */
  93         name = kmalloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_WAITOK);
  94         strcpy(name, device_get_nameunit(dev));
  95         ahc = ahc_alloc(dev, name);
  96         if (ahc == NULL)
  97                 return (ENOMEM);
  98
  99         ahc_set_unit(ahc, device_get_unit(dev));
 100
 101         /*
 102          * Should we bother disabling 39Bit addressing
 103          * based on installed memory?
 104          */
 105         if (sizeof(bus_addr_t) > 4)
 106                 ahc->flags |= AHC_39BIT_ADDRESSING;
 107
 108         /* Allocate a dmatag for our SCB DMA maps */
 109         /* XXX Should be a child of the PCI bus dma tag */
 110         error = aic_dma_tag_create(ahc, /*parent*/NULL, /*alignment*/1,
 111                                    /*boundary*/0,
 112                                    (ahc->flags & AHC_39BIT_ADDRESSING)
 113                                    ? 0x7FFFFFFFFFULL
 114                                    : BUS_SPACE_MAXADDR_32BIT,
 115                                    /*highaddr*/BUS_SPACE_MAXADDR,
 116                                    /*filter*/NULL, /*filterarg*/NULL,
 117                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
 118                                    /*nsegments*/AHC_NSEG,
 119                                    /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
 120                                    /*flags*/0,
 121                                    &ahc->parent_dmat);
 122
 123         if (error != 0) {
 124                 kprintf("ahc_pci_attach: Could not allocate DMA tag "
 125                        "- error %d\n", error);
 126                 ahc_free(ahc);
 127                 return (ENOMEM);
 128         }
 129         ahc->dev_softc = dev;
 130         error = ahc_pci_config(ahc, entry);
 131         if (error != 0) {
 132                 ahc_free(ahc);
 133                 return (error);
 134         }
 135
 136         ahc_attach(ahc);
 137         return (0);
 138 }
 139
 140 int
 141 ahc_pci_map_registers(struct ahc_softc *ahc)
 142 {
 143         struct  resource *regs;
 144         u_int   command;
 145         int     regs_type;
 146         int     regs_id;
 147         int     allow_memio;
 148
 149         command = aic_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
 150         regs = NULL;
 151         regs_type = 0;
 152         regs_id = 0;
 153
 154         /* Retrieve the per-device 'allow_memio' hint */
 155         if (resource_int_value(device_get_name(ahc->dev_softc),
 156                                device_get_unit(ahc->dev_softc),
 157                                "allow_memio", &allow_memio) != 0) {
 158                 if (bootverbose)
 159                         device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
 160 #ifdef AHC_ALLOW_MEMIO
 161                 if (bootverbose)
 162                         kprintf("on\n");
 163                 allow_memio = 1;
 164 #else
 165                 if (bootverbose)
 166                         kprintf("off\n");
 167                 allow_memio = 0;
 168 #endif
 169         }
 170
 171         if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {
 172
 173                 regs_type = SYS_RES_MEMORY;
 174                 regs_id = AHC_PCI_MEMADDR;
 175                 regs = bus_alloc_resource(ahc->dev_softc, regs_type,
 176                                           &regs_id, 0, ~0, 1, RF_ACTIVE);
 177                 if (regs != NULL) {
 178                         ahc->tag = rman_get_bustag(regs);
 179                         ahc->bsh = rman_get_bushandle(regs);
 180
 181                         /*
 182                          * Do a quick test to see if memory mapped
 183                          * I/O is functioning correctly.
 184                          */
 185                         if (ahc_pci_test_register_access(ahc) != 0) {
 186                                 device_printf(ahc->dev_softc,
 187                                        "PCI Device %d:%d:%d failed memory "
 188                                        "mapped test.  Using PIO.\n",
 189                                        aic_get_pci_bus(ahc->dev_softc),
 190                                        aic_get_pci_slot(ahc->dev_softc),
 191                                        aic_get_pci_function(ahc->dev_softc));
 192                                 bus_release_resource(ahc->dev_softc, regs_type,
 193                                                      regs_id, regs);
 194                                 regs = NULL;
 195                         } else {
 196                                 command &= ~PCIM_CMD_PORTEN;
 197                                 aic_pci_write_config(ahc->dev_softc,
 198                                                      PCIR_COMMAND,
 199                                                      command, /*bytes*/1);
 200                         }
 201                 }
 202         }
 203
 204         if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
 205                 regs_type = SYS_RES_IOPORT;
 206                 regs_id = AHC_PCI_IOADDR;
 207                 regs = bus_alloc_resource(ahc->dev_softc, regs_type,
 208                                           &regs_id, 0, ~0, 1, RF_ACTIVE);
 209                 if (regs != NULL) {
 210                         ahc->tag = rman_get_bustag(regs);
 211                         ahc->bsh = rman_get_bushandle(regs);
 212                         if (ahc_pci_test_register_access(ahc) != 0) {
 213                                 device_printf(ahc->dev_softc,
 214                                        "PCI Device %d:%d:%d failed I/O "
 215                                        "mapped test.\n",
 216                                        aic_get_pci_bus(ahc->dev_softc),
 217                                        aic_get_pci_slot(ahc->dev_softc),
 218                                        aic_get_pci_function(ahc->dev_softc));
 219                                 bus_release_resource(ahc->dev_softc, regs_type,
 220                                                      regs_id, regs);
 221                                 regs = NULL;
 222                         } else {
 223                                 command &= ~PCIM_CMD_MEMEN;
 224                                 aic_pci_write_config(ahc->dev_softc,
 225                                                      PCIR_COMMAND,
 226                                                      command, /*bytes*/1);
 227                         }
 228                 }
 229         }
 230         if (regs == NULL) {
 231                 device_printf(ahc->dev_softc,
 232                               "can't allocate register resources\n");
 233                 return (ENOMEM);
 234         }
 235         ahc->platform_data->regs_res_type = regs_type;
 236         ahc->platform_data->regs_res_id = regs_id;
 237         ahc->platform_data->regs = regs;
 238         return (0);
 239 }
 240
 241 int
 242 ahc_pci_map_int(struct ahc_softc *ahc)
 243 {
 244         int zero;
 245
 246         zero = 0;
 247         ahc->platform_data->irq =
 248             bus_alloc_resource(ahc->dev_softc, SYS_RES_IRQ, &zero,
 249                                0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
 250         if (ahc->platform_data->irq == NULL) {
 251                 device_printf(ahc->dev_softc,
 252                               "bus_alloc_resource() failed to allocate IRQ\n");
 253                 return (ENOMEM);
 254         }
 255         ahc->platform_data->irq_res_type = SYS_RES_IRQ;
 256         return (ahc_map_int(ahc));
 257 }
 258
 259
 260 #endif