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  */
  35
  36 #include <dev/aic7xxx/aic7xxx_osm.h>
  37
  38 #define AHC_PCI_IOADDR  PCIR_MAPS       /* I/O Address */
  39 #define AHC_PCI_MEMADDR (PCIR_MAPS + 4) /* Mem I/O Address */
  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 = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
  94         if (name == NULL)
  95                 return (ENOMEM);
  96         strcpy(name, device_get_nameunit(dev));
  97         ahc = ahc_alloc(dev, name);
  98         if (ahc == NULL)
  99                 return (ENOMEM);
 100
 101         ahc_set_unit(ahc, device_get_unit(dev));
 102
 103         /*
 104          * Should we bother disabling 39Bit addressing
 105          * based on installed memory?
 106          */
 107         if (sizeof(bus_addr_t) > 4)
 108                 ahc->flags |= AHC_39BIT_ADDRESSING;
 109
 110         /* Allocate a dmatag for our SCB DMA maps */
 111         /* XXX Should be a child of the PCI bus dma tag */
 112         error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
 113                                    /*boundary*/0,
 114                                    (ahc->flags & AHC_39BIT_ADDRESSING)
 115                                    ? 0x7FFFFFFFFF
 116                                    : BUS_SPACE_MAXADDR_32BIT,
 117                                    /*highaddr*/BUS_SPACE_MAXADDR,
 118                                    /*filter*/NULL, /*filterarg*/NULL,
 119                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
 120                                    /*nsegments*/AHC_NSEG,
 121                                    /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
 122                                    /*flags*/0,
 123                                    &ahc->parent_dmat);
 124
 125         if (error != 0) {
 126                 printf("ahc_pci_attach: Could not allocate DMA tag "
 127                        "- error %d\n", error);
 128                 ahc_free(ahc);
 129                 return (ENOMEM);
 130         }
 131         ahc->dev_softc = dev;
 132         error = ahc_pci_config(ahc, entry);
 133         if (error != 0) {
 134                 ahc_free(ahc);
 135                 return (error);
 136         }
 137
 138         ahc_attach(ahc);
 139         return (0);
 140 }
 141
 142 int
 143 ahc_pci_map_registers(struct ahc_softc *ahc)
 144 {
 145         struct  resource *regs;
 146         u_int   command;
 147         int     regs_type;
 148         int     regs_id;
 149         int     allow_memio;
 150
 151         command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
 152         regs = 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(ahc->dev_softc),
 158                                device_get_unit(ahc->dev_softc),
 159                                "allow_memio", &allow_memio) != 0) {
 160                 if (bootverbose)
 161                         device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
 162 #ifdef AHC_ALLOW_MEMIO
 163                 if (bootverbose)
 164                         printf("on\n");
 165                 allow_memio = 1;
 166 #else
 167                 if (bootverbose)
 168                         printf("off\n");
 169                 allow_memio = 0;
 170 #endif
 171         }
 172
 173         if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {
 174
 175                 regs_type = SYS_RES_MEMORY;
 176                 regs_id = AHC_PCI_MEMADDR;
 177                 regs = bus_alloc_resource(ahc->dev_softc, regs_type,
 178                                           &regs_id, 0, ~0, 1, RF_ACTIVE);
 179                 if (regs != NULL) {
 180                         ahc->tag = rman_get_bustag(regs);
 181                         ahc->bsh = rman_get_bushandle(regs);
 182
 183                         /*
 184                          * Do a quick test to see if memory mapped
 185                          * I/O is functioning correctly.
 186                          */
 187                         if (ahc_pci_test_register_access(ahc) != 0) {
 188                                 device_printf(ahc->dev_softc,
 189                                        "PCI Device %d:%d:%d failed memory "
 190                                        "mapped test.  Using PIO.\n",
 191                                        ahc_get_pci_bus(ahc->dev_softc),
 192                                        ahc_get_pci_slot(ahc->dev_softc),
 193                                        ahc_get_pci_function(ahc->dev_softc));
 194                                 bus_release_resource(ahc->dev_softc, regs_type,
 195                                                      regs_id, regs);
 196                                 regs = NULL;
 197                         } else {
 198                                 command &= ~PCIM_CMD_PORTEN;
 199                                 ahc_pci_write_config(ahc->dev_softc,
 200                                                      PCIR_COMMAND,
 201                                                      command, /*bytes*/1);
 202                         }
 203                 }
 204         }
 205
 206         if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
 207                 regs_type = SYS_RES_IOPORT;
 208                 regs_id = AHC_PCI_IOADDR;
 209                 regs = bus_alloc_resource(ahc->dev_softc, regs_type,
 210                                           &regs_id, 0, ~0, 1, RF_ACTIVE);
 211                 if (regs != NULL) {
 212                         ahc->tag = rman_get_bustag(regs);
 213                         ahc->bsh = rman_get_bushandle(regs);
 214                         command &= ~PCIM_CMD_MEMEN;
 215                         ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
 216                                              command, /*bytes*/1);
 217                 }
 218         }
 219         if (regs == NULL) {
 220                 device_printf(ahc->dev_softc,
 221                               "can't allocate register resources\n");
 222                 return (ENOMEM);
 223         }
 224         ahc->platform_data->regs_res_type = regs_type;
 225         ahc->platform_data->regs_res_id = regs_id;
 226         ahc->platform_data->regs = regs;
 227         return (0);
 228 }
 229
 230 int
 231 ahc_pci_map_int(struct ahc_softc *ahc)
 232 {
 233         int zero;
 234
 235         zero = 0;
 236         ahc->platform_data->irq =
 237             bus_alloc_resource(ahc->dev_softc, SYS_RES_IRQ, &zero,
 238                                0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
 239         if (ahc->platform_data->irq == NULL) {
 240                 device_printf(ahc->dev_softc,
 241                               "bus_alloc_resource() failed to allocate IRQ\n");
 242                 return (ENOMEM);
 243         }
 244         ahc->platform_data->irq_res_type = SYS_RES_IRQ;
 245         return (ahc_map_int(ahc));
 246 }
 247
 248 void
 249 ahc_power_state_change(struct ahc_softc *ahc, ahc_power_state new_state)
 250 {
 251         uint32_t cap;
 252         u_int cap_offset;
 253
 254         /*
 255          * Traverse the capability list looking for
 256          * the power management capability.
 257          */
 258         cap = 0;
 259         cap_offset = ahc_pci_read_config(ahc->dev_softc,
 260                                          PCIR_CAP_PTR, /*bytes*/1);
 261         while (cap_offset != 0) {
 262
 263                 cap = ahc_pci_read_config(ahc->dev_softc,
 264                                           cap_offset, /*bytes*/4);
 265                 if ((cap & 0xFF) == 1
 266                  && ((cap >> 16) & 0x3) > 0) {
 267                         uint32_t pm_control;
 268
 269                         pm_control = ahc_pci_read_config(ahc->dev_softc,
 270                                                          cap_offset + 4,
 271                                                          /*bytes*/2);
 272                         pm_control &= ~0x3;
 273                         pm_control |= new_state;
 274                         ahc_pci_write_config(ahc->dev_softc,
 275                                              cap_offset + 4,
 276                                              pm_control, /*bytes*/2);
 277                         break;
 278                 }
 279                 cap_offset = (cap >> 8) & 0xFF;
 280         }
 281 }