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#13 $
  32  *
  33  * $FreeBSD: src/sys/dev/aic7xxx/ahd_pci.c,v 1.2.2.5 2003/06/10 03:26:07 gibbs Exp $
  34  */
  35
  36 #include <dev/aic7xxx/aic79xx_osm.h>
  37
  38 #define AHD_PCI_IOADDR0 PCIR_MAPS       /* Primary I/O BAR */
  39 #define AHD_PCI_MEMADDR (PCIR_MAPS + 4) /* Mem I/O Address */
  40 #define AHD_PCI_IOADDR1 (PCIR_MAPS + 12)/* Secondary I/O BAR */
  41
  42 static int ahd_pci_probe(device_t dev);
  43 static int ahd_pci_attach(device_t dev);
  44
  45 static device_method_t ahd_pci_device_methods[] = {
  46         /* Device interface */
  47         DEVMETHOD(device_probe,         ahd_pci_probe),
  48         DEVMETHOD(device_attach,        ahd_pci_attach),
  49         DEVMETHOD(device_detach,        ahd_detach),
  50         { 0, 0 }
  51 };
  52
  53 static driver_t ahd_pci_driver = {
  54         "ahd",
  55         ahd_pci_device_methods,
  56         sizeof(struct ahd_softc)
  57 };
  58
  59 static devclass_t ahd_devclass;
  60
  61 DRIVER_MODULE(ahd, pci, ahd_pci_driver, ahd_devclass, 0, 0);
  62 DRIVER_MODULE(ahd, cardbus, ahd_pci_driver, ahd_devclass, 0, 0);
  63 MODULE_DEPEND(ahd_pci, ahd, 1, 1, 1);
  64 MODULE_VERSION(ahd_pci, 1);
  65
  66 static int
  67 ahd_pci_probe(device_t dev)
  68 {
  69         struct  ahd_pci_identity *entry;
  70
  71         entry = ahd_find_pci_device(dev);
  72         if (entry != NULL) {
  73                 device_set_desc(dev, entry->name);
  74                 return (0);
  75         }
  76         return (ENXIO);
  77 }
  78
  79 static int
  80 ahd_pci_attach(device_t dev)
  81 {
  82         struct   ahd_pci_identity *entry;
  83         struct   ahd_softc *ahd;
  84         char    *name;
  85         int      error;
  86
  87         entry = ahd_find_pci_device(dev);
  88         if (entry == NULL)
  89                 return (ENXIO);
  90
  91         /*
  92          * Allocate a softc for this card and
  93          * set it up for attachment by our
  94          * common detect routine.
  95          */
  96         name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
  97         if (name == NULL)
  98                 return (ENOMEM);
  99         strcpy(name, device_get_nameunit(dev));
 100         ahd = ahd_alloc(dev, name);
 101         if (ahd == NULL)
 102                 return (ENOMEM);
 103
 104         ahd_set_unit(ahd, device_get_unit(dev));
 105
 106         /*
 107          * Should we bother disabling 39Bit addressing
 108          * based on installed memory?
 109          */
 110         if (sizeof(bus_addr_t) > 4)
 111                 ahd->flags |= AHD_39BIT_ADDRESSING;
 112
 113         /* Allocate a dmatag for our SCB DMA maps */
 114         /* XXX Should be a child of the PCI bus dma tag */
 115         error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
 116                                    /*boundary*/0,
 117                                    (ahd->flags & AHD_39BIT_ADDRESSING)
 118                                    ? 0x7FFFFFFFFF
 119                                    : BUS_SPACE_MAXADDR_32BIT,
 120                                    /*highaddr*/BUS_SPACE_MAXADDR,
 121                                    /*filter*/NULL, /*filterarg*/NULL,
 122                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
 123                                    /*nsegments*/AHD_NSEG,
 124                                    /*maxsegsz*/AHD_MAXTRANSFER_SIZE,
 125                                    /*flags*/0,
 126                                    &ahd->parent_dmat);
 127
 128         if (error != 0) {
 129                 printf("ahd_pci_attach: Could not allocate DMA tag "
 130                        "- error %d\n", error);
 131                 ahd_free(ahd);
 132                 return (ENOMEM);
 133         }
 134         ahd->dev_softc = dev;
 135         error = ahd_pci_config(ahd, entry);
 136         if (error != 0) {
 137                 ahd_free(ahd);
 138                 return (error);
 139         }
 140
 141         ahd_attach(ahd);
 142         return (0);
 143 }
 144
 145 int
 146 ahd_pci_map_registers(struct ahd_softc *ahd)
 147 {
 148         struct  resource *regs;
 149         struct  resource *regs2;
 150         u_int   command;
 151         int     regs_type;
 152         int     regs_id;
 153         int     regs_id2;
 154         int     allow_memio;
 155
 156         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
 157         regs = NULL;
 158         regs2 = NULL;
 159         regs_type = 0;
 160         regs_id = 0;
 161
 162         /* Retrieve the per-device 'allow_memio' hint */
 163         if (resource_int_value(device_get_name(ahd->dev_softc),
 164                                device_get_unit(ahd->dev_softc),
 165                                "allow_memio", &allow_memio) != 0) {
 166                 if (bootverbose)
 167                         device_printf(ahd->dev_softc,
 168                                       "Defaulting to MEMIO on\n");
 169         }
 170
 171         if ((command & PCIM_CMD_MEMEN) != 0
 172          && (ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0
 173          && allow_memio != 0) {
 174
 175                 regs_type = SYS_RES_MEMORY;
 176                 regs_id = AHD_PCI_MEMADDR;
 177                 regs = bus_alloc_resource(ahd->dev_softc, regs_type,
 178                                           &regs_id, 0, ~0, 1, RF_ACTIVE);
 179                 if (regs != NULL) {
 180                         int error;
 181
 182                         ahd->tags[0] = rman_get_bustag(regs);
 183                         ahd->bshs[0] = rman_get_bushandle(regs);
 184                         ahd->tags[1] = ahd->tags[0];
 185                         error = bus_space_subregion(ahd->tags[0], ahd->bshs[0],
 186                                                     /*offset*/0x100,
 187                                                     /*size*/0x100,
 188                                                     &ahd->bshs[1]);
 189                         /*
 190                          * Do a quick test to see if memory mapped
 191                          * I/O is functioning correctly.
 192                          */
 193                         if (error != 0
 194                          || ahd_pci_test_register_access(ahd) != 0) {
 195                                 device_printf(ahd->dev_softc,
 196                                        "PCI Device %d:%d:%d failed memory "
 197                                        "mapped test.  Using PIO.\n",
 198                                        ahd_get_pci_bus(ahd->dev_softc),
 199                                        ahd_get_pci_slot(ahd->dev_softc),
 200                                        ahd_get_pci_function(ahd->dev_softc));
 201                                 bus_release_resource(ahd->dev_softc, regs_type,
 202                                                      regs_id, regs);
 203                                 regs = NULL;
 204                         } else {
 205                                 command &= ~PCIM_CMD_PORTEN;
 206                                 ahd_pci_write_config(ahd->dev_softc,
 207                                                      PCIR_COMMAND,
 208                                                      command, /*bytes*/1);
 209                         }
 210                 }
 211         }
 212         if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
 213                 regs_type = SYS_RES_IOPORT;
 214                 regs_id = AHD_PCI_IOADDR0;
 215                 regs = bus_alloc_resource(ahd->dev_softc, regs_type,
 216                                           &regs_id, 0, ~0, 1, RF_ACTIVE);
 217                 if (regs == NULL) {
 218                         device_printf(ahd->dev_softc,
 219                                       "can't allocate register resources\n");
 220                         return (ENOMEM);
 221                 }
 222                 ahd->tags[0] = rman_get_bustag(regs);
 223                 ahd->bshs[0] = rman_get_bushandle(regs);
 224
 225                 /* And now the second BAR */
 226                 regs_id2 = AHD_PCI_IOADDR1;
 227                 regs2 = bus_alloc_resource(ahd->dev_softc, regs_type,
 228                                            &regs_id2, 0, ~0, 1, RF_ACTIVE);
 229                 if (regs2 == NULL) {
 230                         device_printf(ahd->dev_softc,
 231                                       "can't allocate register resources\n");
 232                         return (ENOMEM);
 233                 }
 234                 ahd->tags[1] = rman_get_bustag(regs2);
 235                 ahd->bshs[1] = rman_get_bushandle(regs2);
 236                 command &= ~PCIM_CMD_MEMEN;
 237                 ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 238                                      command, /*bytes*/1);
 239                 ahd->platform_data->regs_res_type[1] = regs_type;
 240                 ahd->platform_data->regs_res_id[1] = regs_id2;
 241                 ahd->platform_data->regs[1] = regs2;
 242         }
 243         ahd->platform_data->regs_res_type[0] = regs_type;
 244         ahd->platform_data->regs_res_id[0] = regs_id;
 245         ahd->platform_data->regs[0] = regs;
 246         return (0);
 247 }
 248
 249 int
 250 ahd_pci_map_int(struct ahd_softc *ahd)
 251 {
 252         int zero;
 253
 254         zero = 0;
 255         ahd->platform_data->irq =
 256             bus_alloc_resource(ahd->dev_softc, SYS_RES_IRQ, &zero,
 257                                0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
 258         if (ahd->platform_data->irq == NULL)
 259                 return (ENOMEM);
 260         ahd->platform_data->irq_res_type = SYS_RES_IRQ;
 261         return (ahd_map_int(ahd));
 262 }
 263
 264 void
 265 ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
 266 {
 267         uint32_t cap;
 268         u_int cap_offset;
 269
 270         /*
 271          * Traverse the capability list looking for
 272          * the power management capability.
 273          */
 274         cap = 0;
 275         cap_offset = ahd_pci_read_config(ahd->dev_softc,
 276                                          PCIR_CAP_PTR, /*bytes*/1);
 277         while (cap_offset != 0) {
 278
 279                 cap = ahd_pci_read_config(ahd->dev_softc,
 280                                           cap_offset, /*bytes*/4);
 281                 if ((cap & 0xFF) == 1
 282                  && ((cap >> 16) & 0x3) > 0) {
 283                         uint32_t pm_control;
 284
 285                         pm_control = ahd_pci_read_config(ahd->dev_softc,
 286                                                          cap_offset + 4,
 287                                                          /*bytes*/2);
 288                         pm_control &= ~0x3;
 289                         pm_control |= new_state;
 290                         ahd_pci_write_config(ahd->dev_softc,
 291                                              cap_offset + 4,
 292                                              pm_control, /*bytes*/2);
 293                         break;
 294                 }
 295                 cap_offset = (cap >> 8) & 0xFF;
 296         }
 297 }