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#13 $
  32  *
  33  * $FreeBSD: src/sys/dev/aic7xxx/ahc_pci.c,v 1.29.2.14 2003/06/10 03:26:07 gibbs Exp $
  34  * $DragonFly: src/sys/dev/disk/aic7xxx/ahc_pci.c,v 1.5 2004/03/15 01:10:42 dillon Exp $
  35  */
  36
  37 #include "aic7xxx_osm.h"
  38
  39 #define AHC_PCI_IOADDR  PCIR_MAPS       /* I/O Address */
  40 #define AHC_PCI_MEMADDR (PCIR_MAPS + 4) /* Mem I/O Address */
  41
  42 static int ahc_pci_probe(device_t dev);
  43 static int ahc_pci_attach(device_t dev);
  44
  45 static device_method_t ahc_pci_device_methods[] = {
  46         /* Device interface */
  47         DEVMETHOD(device_probe,         ahc_pci_probe),
  48         DEVMETHOD(device_attach,        ahc_pci_attach),
  49         DEVMETHOD(device_detach,        ahc_detach),
  50         { 0, 0 }
  51 };
  52
  53 static driver_t ahc_pci_driver = {
  54         "ahc",
  55         ahc_pci_device_methods,
  56         sizeof(struct ahc_softc)
  57 };
  58
  59 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, ahc_devclass, 0, 0);
  60 DRIVER_MODULE(ahc_pci, cardbus, ahc_pci_driver, ahc_devclass, 0, 0);
  61 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1);
  62 MODULE_VERSION(ahc_pci, 1);
  63
  64 static int
  65 ahc_pci_probe(device_t dev)
  66 {
  67         struct  ahc_pci_identity *entry;
  68
  69         entry = ahc_find_pci_device(dev);
  70         if (entry != NULL) {
  71                 device_set_desc(dev, entry->name);
  72                 return (0);
  73         }
  74         return (ENXIO);
  75 }
  76
  77 static int
  78 ahc_pci_attach(device_t dev)
  79 {
  80         struct   ahc_pci_identity *entry;
  81         struct   ahc_softc *ahc;
  82         char    *name;
  83         int      error;
  84
  85         entry = ahc_find_pci_device(dev);
  86         if (entry == NULL)
  87                 return (ENXIO);
  88
  89         /*
  90          * Allocate a softc for this card and
  91          * set it up for attachment by our
  92          * common detect routine.
  93          */
  94         name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_WAITOK);
  95         strcpy(name, device_get_nameunit(dev));
  96         ahc = ahc_alloc(dev, name);
  97         if (ahc == NULL)
  98                 return (ENOMEM);
  99
 100         ahc_set_unit(ahc, 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                 ahc->flags |= AHC_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 = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
 112                                    /*boundary*/0,
 113                                    (ahc->flags & AHC_39BIT_ADDRESSING)
 114                                    ? 0x7FFFFFFFFFULL
 115                                    : BUS_SPACE_MAXADDR_32BIT,
 116                                    /*highaddr*/BUS_SPACE_MAXADDR,
 117                                    /*filter*/NULL, /*filterarg*/NULL,
 118                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
 119                                    /*nsegments*/AHC_NSEG,
 120                                    /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
 121                                    /*flags*/0,
 122                                    &ahc->parent_dmat);
 123
 124         if (error != 0) {
 125                 printf("ahc_pci_attach: Could not allocate DMA tag "
 126                        "- error %d\n", error);
 127                 ahc_free(ahc);
 128                 return (ENOMEM);
 129         }
 130         ahc->dev_softc = dev;
 131         error = ahc_pci_config(ahc, entry);
 132         if (error != 0) {
 133                 ahc_free(ahc);
 134                 return (error);
 135         }
 136
 137         ahc_attach(ahc);
 138         return (0);
 139 }
 140
 141 int
 142 ahc_pci_map_registers(struct ahc_softc *ahc)
 143 {
 144         struct  resource *regs;
 145         u_int   command;
 146         int     regs_type;
 147         int     regs_id;
 148         int     allow_memio;
 149
 150         command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
 151         regs = NULL;
 152         regs_type = 0;
 153         regs_id = 0;
 154
 155         /* Retrieve the per-device 'allow_memio' hint */
 156         if (resource_int_value(device_get_name(ahc->dev_softc),
 157                                device_get_unit(ahc->dev_softc),
 158                                "allow_memio", &allow_memio) != 0) {
 159                 if (bootverbose)
 160                         device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
 161 #ifdef AHC_ALLOW_MEMIO
 162                 if (bootverbose)
 163                         printf("on\n");
 164                 allow_memio = 1;
 165 #else
 166                 if (bootverbose)
 167                         printf("off\n");
 168                 allow_memio = 0;
 169 #endif
 170         }
 171
 172         if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {
 173
 174                 regs_type = SYS_RES_MEMORY;
 175                 regs_id = AHC_PCI_MEMADDR;
 176                 regs = bus_alloc_resource(ahc->dev_softc, regs_type,
 177                                           &regs_id, 0, ~0, 1, RF_ACTIVE);
 178                 if (regs != NULL) {
 179                         ahc->tag = rman_get_bustag(regs);
 180                         ahc->bsh = rman_get_bushandle(regs);
 181
 182                         /*
 183                          * Do a quick test to see if memory mapped
 184                          * I/O is functioning correctly.
 185                          */
 186                         if (ahc_pci_test_register_access(ahc) != 0) {
 187                                 device_printf(ahc->dev_softc,
 188                                        "PCI Device %d:%d:%d failed memory "
 189                                        "mapped test.  Using PIO.\n",
 190                                        ahc_get_pci_bus(ahc->dev_softc),
 191                                        ahc_get_pci_slot(ahc->dev_softc),
 192                                        ahc_get_pci_function(ahc->dev_softc));
 193                                 bus_release_resource(ahc->dev_softc, regs_type,
 194                                                      regs_id, regs);
 195                                 regs = NULL;
 196                         } else {
 197                                 command &= ~PCIM_CMD_PORTEN;
 198                                 ahc_pci_write_config(ahc->dev_softc,
 199                                                      PCIR_COMMAND,
 200                                                      command, /*bytes*/1);
 201                         }
 202                 }
 203         }
 204
 205         if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
 206                 regs_type = SYS_RES_IOPORT;
 207                 regs_id = AHC_PCI_IOADDR;
 208                 regs = bus_alloc_resource(ahc->dev_softc, regs_type,
 209                                           &regs_id, 0, ~0, 1, RF_ACTIVE);
 210                 if (regs != NULL) {
 211                         ahc->tag = rman_get_bustag(regs);
 212                         ahc->bsh = rman_get_bushandle(regs);
 213                         command &= ~PCIM_CMD_MEMEN;
 214                         ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
 215                                              command, /*bytes*/1);
 216                 }
 217         }
 218         if (regs == NULL) {
 219                 device_printf(ahc->dev_softc,
 220                               "can't allocate register resources\n");
 221                 return (ENOMEM);
 222         }
 223         ahc->platform_data->regs_res_type = regs_type;
 224         ahc->platform_data->regs_res_id = regs_id;
 225         ahc->platform_data->regs = regs;
 226         return (0);
 227 }
 228
 229 int
 230 ahc_pci_map_int(struct ahc_softc *ahc)
 231 {
 232         int zero;
 233
 234         zero = 0;
 235         ahc->platform_data->irq =
 236             bus_alloc_resource(ahc->dev_softc, SYS_RES_IRQ, &zero,
 237                                0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
 238         if (ahc->platform_data->irq == NULL) {
 239                 device_printf(ahc->dev_softc,
 240                               "bus_alloc_resource() failed to allocate IRQ\n");
 241                 return (ENOMEM);
 242         }
 243         ahc->platform_data->irq_res_type = SYS_RES_IRQ;
 244         return (ahc_map_int(ahc));
 245 }
 246
 247 void
 248 ahc_power_state_change(struct ahc_softc *ahc, ahc_power_state new_state)
 249 {
 250         uint32_t cap;
 251         u_int cap_offset;
 252
 253         /*
 254          * Traverse the capability list looking for
 255          * the power management capability.
 256          */
 257         cap = 0;
 258         cap_offset = ahc_pci_read_config(ahc->dev_softc,
 259                                          PCIR_CAP_PTR, /*bytes*/1);
 260         while (cap_offset != 0) {
 261
 262                 cap = ahc_pci_read_config(ahc->dev_softc,
 263                                           cap_offset, /*bytes*/4);
 264                 if ((cap & 0xFF) == 1
 265                  && ((cap >> 16) & 0x3) > 0) {
 266                         uint32_t pm_control;
 267
 268                         pm_control = ahc_pci_read_config(ahc->dev_softc,
 269                                                          cap_offset + 4,
 270                                                          /*bytes*/2);
 271                         pm_control &= ~0x3;
 272                         pm_control |= new_state;
 273                         ahc_pci_write_config(ahc->dev_softc,
 274                                              cap_offset + 4,
 275                                              pm_control, /*bytes*/2);
 276                         break;
 277                 }
 278                 cap_offset = (cap >> 8) & 0xFF;
 279         }
 280 }