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 1.8 2006/12/22 23:26:15 swildner Exp $
  35  */
  36
  37 #include "aic7xxx_osm.h"
  38
  39 #ifdef AHC_PCI_CONFIG
  40
  41 #define AHC_PCI_IOADDR  PCIR_MAPS       /* I/O Address */
  42 #define AHC_PCI_MEMADDR (PCIR_MAPS + 4) /* Mem I/O Address */
  43
  44 static int ahc_pci_probe(device_t dev);
  45 static int ahc_pci_attach(device_t dev);
  46
  47 static device_method_t ahc_pci_device_methods[] = {
  48         /* Device interface */
  49         DEVMETHOD(device_probe,         ahc_pci_probe),
  50         DEVMETHOD(device_attach,        ahc_pci_attach),
  51         DEVMETHOD(device_detach,        ahc_detach),
  52         { 0, 0 }
  53 };
  54
  55 static driver_t ahc_pci_driver = {
  56         "ahc",
  57         ahc_pci_device_methods,
  58         sizeof(struct ahc_softc)
  59 };
  60
  61 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, ahc_devclass, 0, 0);
  62 DRIVER_MODULE(ahc_pci, cardbus, ahc_pci_driver, ahc_devclass, 0, 0);
  63 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1);
  64 MODULE_VERSION(ahc_pci, 1);
  65
  66 static int
  67 ahc_pci_probe(device_t dev)
  68 {
  69         struct  ahc_pci_identity *entry;
  70
  71         entry = ahc_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 ahc_pci_attach(device_t dev)
  81 {
  82         struct   ahc_pci_identity *entry;
  83         struct   ahc_softc *ahc;
  84         char    *name;
  85         int      error;
  86
  87         entry = ahc_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 = kmalloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_WAITOK);
  97         strcpy(name, device_get_nameunit(dev));
  98         ahc = ahc_alloc(dev, name);
  99         if (ahc == NULL)
 100                 return (ENOMEM);
 101
 102         ahc_set_unit(ahc, device_get_unit(dev));
 103
 104         /*
 105          * Should we bother disabling 39Bit addressing
 106          * based on installed memory?
 107          */
 108         if (sizeof(bus_addr_t) > 4)
 109                 ahc->flags |= AHC_39BIT_ADDRESSING;
 110
 111         /* Allocate a dmatag for our SCB DMA maps */
 112         /* XXX Should be a child of the PCI bus dma tag */
 113         error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
 114                                    /*boundary*/0,
 115                                    (ahc->flags & AHC_39BIT_ADDRESSING)
 116                                    ? 0x7FFFFFFFFFULL
 117                                    : BUS_SPACE_MAXADDR_32BIT,
 118                                    /*highaddr*/BUS_SPACE_MAXADDR,
 119                                    /*filter*/NULL, /*filterarg*/NULL,
 120                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
 121                                    /*nsegments*/AHC_NSEG,
 122                                    /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
 123                                    /*flags*/0,
 124                                    &ahc->parent_dmat);
 125
 126         if (error != 0) {
 127                 kprintf("ahc_pci_attach: Could not allocate DMA tag "
 128                        "- error %d\n", error);
 129                 ahc_free(ahc);
 130                 return (ENOMEM);
 131         }
 132         ahc->dev_softc = dev;
 133         error = ahc_pci_config(ahc, entry);
 134         if (error != 0) {
 135                 ahc_free(ahc);
 136                 return (error);
 137         }
 138
 139         ahc_attach(ahc);
 140         return (0);
 141 }
 142
 143 int
 144 ahc_pci_map_registers(struct ahc_softc *ahc)
 145 {
 146         struct  resource *regs;
 147         u_int   command;
 148         int     regs_type;
 149         int     regs_id;
 150         int     allow_memio;
 151
 152         command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
 153         regs = NULL;
 154         regs_type = 0;
 155         regs_id = 0;
 156
 157         /* Retrieve the per-device 'allow_memio' hint */
 158         if (resource_int_value(device_get_name(ahc->dev_softc),
 159                                device_get_unit(ahc->dev_softc),
 160                                "allow_memio", &allow_memio) != 0) {
 161                 if (bootverbose)
 162                         device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
 163 #ifdef AHC_ALLOW_MEMIO
 164                 if (bootverbose)
 165                         kprintf("on\n");
 166                 allow_memio = 1;
 167 #else
 168                 if (bootverbose)
 169                         kprintf("off\n");
 170                 allow_memio = 0;
 171 #endif
 172         }
 173
 174         if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {
 175
 176                 regs_type = SYS_RES_MEMORY;
 177                 regs_id = AHC_PCI_MEMADDR;
 178                 regs = bus_alloc_resource(ahc->dev_softc, regs_type,
 179                                           &regs_id, 0, ~0, 1, RF_ACTIVE);
 180                 if (regs != NULL) {
 181                         ahc->tag = rman_get_bustag(regs);
 182                         ahc->bsh = rman_get_bushandle(regs);
 183
 184                         /*
 185                          * Do a quick test to see if memory mapped
 186                          * I/O is functioning correctly.
 187                          */
 188                         if (ahc_pci_test_register_access(ahc) != 0) {
 189                                 device_printf(ahc->dev_softc,
 190                                        "PCI Device %d:%d:%d failed memory "
 191                                        "mapped test.  Using PIO.\n",
 192                                        ahc_get_pci_bus(ahc->dev_softc),
 193                                        ahc_get_pci_slot(ahc->dev_softc),
 194                                        ahc_get_pci_function(ahc->dev_softc));
 195                                 bus_release_resource(ahc->dev_softc, regs_type,
 196                                                      regs_id, regs);
 197                                 regs = NULL;
 198                         } else {
 199                                 command &= ~PCIM_CMD_PORTEN;
 200                                 ahc_pci_write_config(ahc->dev_softc,
 201                                                      PCIR_COMMAND,
 202                                                      command, /*bytes*/1);
 203                         }
 204                 }
 205         }
 206
 207         if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
 208                 regs_type = SYS_RES_IOPORT;
 209                 regs_id = AHC_PCI_IOADDR;
 210                 regs = bus_alloc_resource(ahc->dev_softc, regs_type,
 211                                           &regs_id, 0, ~0, 1, RF_ACTIVE);
 212                 if (regs != NULL) {
 213                         ahc->tag = rman_get_bustag(regs);
 214                         ahc->bsh = rman_get_bushandle(regs);
 215                         command &= ~PCIM_CMD_MEMEN;
 216                         ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
 217                                              command, /*bytes*/1);
 218                 }
 219         }
 220         if (regs == NULL) {
 221                 device_printf(ahc->dev_softc,
 222                               "can't allocate register resources\n");
 223                 return (ENOMEM);
 224         }
 225         ahc->platform_data->regs_res_type = regs_type;
 226         ahc->platform_data->regs_res_id = regs_id;
 227         ahc->platform_data->regs = regs;
 228         return (0);
 229 }
 230
 231 int
 232 ahc_pci_map_int(struct ahc_softc *ahc)
 233 {
 234         int zero;
 235
 236         zero = 0;
 237         ahc->platform_data->irq =
 238             bus_alloc_resource(ahc->dev_softc, SYS_RES_IRQ, &zero,
 239                                0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
 240         if (ahc->platform_data->irq == NULL) {
 241                 device_printf(ahc->dev_softc,
 242                               "bus_alloc_resource() failed to allocate IRQ\n");
 243                 return (ENOMEM);
 244         }
 245         ahc->platform_data->irq_res_type = SYS_RES_IRQ;
 246         return (ahc_map_int(ahc));
 247 }
 248
 249 void
 250 ahc_power_state_change(struct ahc_softc *ahc, ahc_power_state new_state)
 251 {
 252         uint32_t cap;
 253         u_int cap_offset;
 254
 255         /*
 256          * Traverse the capability list looking for
 257          * the power management capability.
 258          */
 259         cap = 0;
 260         cap_offset = ahc_pci_read_config(ahc->dev_softc,
 261                                          PCIR_CAP_PTR, /*bytes*/1);
 262         while (cap_offset != 0) {
 263
 264                 cap = ahc_pci_read_config(ahc->dev_softc,
 265                                           cap_offset, /*bytes*/4);
 266                 if ((cap & 0xFF) == 1
 267                  && ((cap >> 16) & 0x3) > 0) {
 268                         uint32_t pm_control;
 269
 270                         pm_control = ahc_pci_read_config(ahc->dev_softc,
 271                                                          cap_offset + 4,
 272                                                          /*bytes*/2);
 273                         pm_control &= ~0x3;
 274                         pm_control |= new_state;
 275                         ahc_pci_write_config(ahc->dev_softc,
 276                                              cap_offset + 4,
 277                                              pm_control, /*bytes*/2);
 278                         break;
 279                 }
 280                 cap_offset = (cap >> 8) & 0xFF;
 281         }
 282 }
 283
 284 #endif