sys/dev/acpi/acpica/OsdHardware.c

   1 /*      $NetBSD: OsdHardware.c,v 1.4 2007/12/12 23:33:22 jmcneill Exp $ */
   2
   3 /*
   4  * Copyright 2001 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * OS Services Layer
  40  *
  41  * 6.7: Address Space Access: Port Input/Output
  42  * 6.8: Address Space Access: Memory and Memory Mapped I/O
  43  * 6.9: Address Space Access: PCI Configuration Space
  44  */
  45
  46 #include <sys/cdefs.h>
  47 __KERNEL_RCSID(0, "$NetBSD: OsdHardware.c,v 1.4 2007/12/12 23:33:22 jmcneill Exp $");
  48
  49 #include <sys/param.h>
  50 #include <sys/device.h>
  51
  52 #include <dev/acpi/acpica.h>
  53 #include <dev/acpi/acpivar.h>
  54
  55 #include <machine/acpi_machdep.h>
  56
  57 /*
  58  * ACPICA doesn't provide much in the way of letting us know which
  59  * hardware resources it wants to use.  We therefore have to resort
  60  * to calling machinde-dependent code to do the access for us.
  61  */
  62
  63 /*
  64  * AcpiOsReadPort:
  65  *
  66  *      Read a value from an input port.
  67  */
  68 ACPI_STATUS
  69 AcpiOsReadPort(ACPI_IO_ADDRESS Address, UINT32 *Value, UINT32 Width)
  70 {
  71
  72         switch (Width) {
  73         case 8:
  74                 *Value = acpi_md_OsIn8(Address);
  75                 break;
  76
  77         case 16:
  78                 *Value = acpi_md_OsIn16(Address);
  79                 break;
  80
  81         case 32:
  82                 *Value = acpi_md_OsIn32(Address);
  83                 break;
  84
  85         default:
  86                 return AE_BAD_PARAMETER;
  87         }
  88
  89         return AE_OK;
  90 }
  91
  92 /*
  93  * AcpiOsWritePort:
  94  *
  95  *      Write a value to an output port.
  96  */
  97 ACPI_STATUS
  98 AcpiOsWritePort(ACPI_IO_ADDRESS Address, UINT32 Value, UINT32 Width)
  99 {
 100
 101         switch (Width) {
 102         case 8:
 103                 acpi_md_OsOut8(Address, Value);
 104                 break;
 105
 106         case 16:
 107                 acpi_md_OsOut16(Address, Value);
 108                 break;
 109
 110         case 32:
 111                 acpi_md_OsOut32(Address, Value);
 112                 break;
 113
 114         default:
 115                 return AE_BAD_PARAMETER;
 116         }
 117
 118         return AE_OK;
 119 }
 120
 121 /*
 122  * AcpiOsReadMemory:
 123  *
 124  *      Read a value from a memory location.
 125  */
 126 ACPI_STATUS
 127 AcpiOsReadMemory(ACPI_PHYSICAL_ADDRESS Address, UINT32 *Value, UINT32 Width)
 128 {
 129         void *LogicalAddress;
 130         ACPI_STATUS rv = AE_OK;
 131
 132         LogicalAddress = AcpiOsMapMemory(Address, Width / 8);
 133         if (LogicalAddress == NULL)
 134                 return AE_NOT_EXIST;
 135
 136         switch (Width) {
 137         case 8:
 138                 *Value = *(volatile uint8_t *) LogicalAddress;
 139                 break;
 140
 141         case 16:
 142                 *Value = *(volatile uint16_t *) LogicalAddress;
 143                 break;
 144
 145         case 32:
 146                 *Value = *(volatile uint32_t *) LogicalAddress;
 147                 break;
 148
 149         default:
 150                 rv = AE_BAD_PARAMETER;
 151         }
 152
 153         AcpiOsUnmapMemory(LogicalAddress, Width / 8);
 154
 155         return rv;
 156 }
 157
 158 /*
 159  * AcpiOsWriteMemory:
 160  *
 161  *      Write a value to a memory location.
 162  */
 163 ACPI_STATUS
 164 AcpiOsWriteMemory(ACPI_PHYSICAL_ADDRESS Address, UINT32 Value, UINT32 Width)
 165 {
 166         void *LogicalAddress;
 167         ACPI_STATUS rv = AE_OK;
 168
 169         LogicalAddress = AcpiOsMapMemory(Address, Width / 8);
 170         if (LogicalAddress == NULL)
 171                 return AE_NOT_FOUND;
 172
 173         switch (Width) {
 174         case 8:
 175                 *(volatile uint8_t *) LogicalAddress = Value;
 176                 break;
 177
 178         case 16:
 179                 *(volatile uint16_t *) LogicalAddress = Value;
 180                 break;
 181
 182         case 32:
 183                 *(volatile uint32_t *) LogicalAddress = Value;
 184                 break;
 185
 186         default:
 187                 rv = AE_BAD_PARAMETER;
 188         }
 189
 190         AcpiOsUnmapMemory(LogicalAddress, Width / 8);
 191
 192         return rv;
 193 }
 194
 195 /*
 196  * AcpiOsReadPciConfiguration:
 197  *
 198  *      Read a value from a PCI configuration register.
 199  */
 200 ACPI_STATUS
 201 AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, void *Value,
 202     UINT32 Width)
 203 {
 204         pcitag_t tag;
 205         pcireg_t tmp;
 206
 207         /* XXX Need to deal with "segment" ("hose" in Alpha terminology). */
 208
 209         if (PciId->Bus >= 256 || PciId->Device >= 32 || PciId->Function >= 8)
 210                 return AE_BAD_PARAMETER;
 211
 212         tag = pci_make_tag(acpi_softc->sc_pc, PciId->Bus, PciId->Device,
 213             PciId->Function);
 214         tmp = pci_conf_read(acpi_softc->sc_pc, tag, Register & ~3);
 215
 216         switch (Width) {
 217         case 8:
 218                 *(uint8_t *) Value = (tmp >> ((Register & 3) * 8)) & 0xff;
 219                 break;
 220
 221         case 16:
 222                 *(uint16_t *) Value = (tmp >> ((Register & 3) * 8)) & 0xffff;
 223                 break;
 224
 225         case 32:
 226                 *(uint32_t *) Value = tmp;
 227                 break;
 228
 229         default:
 230                 return AE_BAD_PARAMETER;
 231         }
 232
 233         return AE_OK;
 234 }
 235
 236 /*
 237  * AcpiOsWritePciConfiguration:
 238  *
 239  *      Write a value to a PCI configuration register.
 240  */
 241 ACPI_STATUS
 242 AcpiOsWritePciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register,
 243     ACPI_INTEGER Value, UINT32 Width)
 244 {
 245         pcitag_t tag;
 246         pcireg_t tmp;
 247
 248         /* XXX Need to deal with "segment" ("hose" in Alpha terminology). */
 249
 250         tag = pci_make_tag(acpi_softc->sc_pc, PciId->Bus, PciId->Device,
 251             PciId->Function);
 252
 253         switch (Width) {
 254         case 8:
 255                 tmp = pci_conf_read(acpi_softc->sc_pc, tag, Register & ~3);
 256                 tmp &= ~(0xff << ((Register & 3) * 8));
 257                 tmp |= (Value << ((Register & 3) * 8));
 258                 break;
 259
 260         case 16:
 261                 tmp = pci_conf_read(acpi_softc->sc_pc, tag, Register & ~3);
 262                 tmp &= ~(0xffff << ((Register & 3) * 8));
 263                 tmp |= (Value << ((Register & 3) * 8));
 264                 break;
 265
 266         case 32:
 267                 tmp = Value;
 268                 break;
 269
 270         default:
 271                 return AE_BAD_PARAMETER;
 272         }
 273
 274         pci_conf_write(acpi_softc->sc_pc, tag, Register & ~3, tmp);
 275
 276         return AE_OK;
 277 }
 278
 279 /* get PCI bus# from root bridge recursively */
 280 static int
 281 get_bus_number(
 282     ACPI_HANDLE        rhandle,
 283     ACPI_HANDLE        chandle,
 284     ACPI_PCI_ID        **PciId)
 285 {
 286         ACPI_HANDLE handle;
 287         ACPI_STATUS rv;
 288         ACPI_OBJECT_TYPE type;
 289         ACPI_PCI_ID *id;
 290         ACPI_INTEGER v;
 291         int bus;
 292
 293         id = *PciId;
 294
 295         rv = AcpiGetParent(chandle, &handle);
 296         if (ACPI_FAILURE(rv))
 297                 return 0;
 298
 299         /*
 300          * When handle == rhandle, we have valid PciId->Bus
 301          * which was obtained from _BBN in evrgnini.c
 302          * so we don't have to reevaluate _BBN.
 303          */
 304         if (handle != rhandle) {
 305                 bus = get_bus_number(rhandle, handle, PciId);
 306
 307                 rv = AcpiGetType(handle, &type);
 308                 if (ACPI_FAILURE(rv) || type != ACPI_TYPE_DEVICE)
 309                         return bus;
 310
 311                 rv = acpi_eval_integer(handle, METHOD_NAME__ADR, &v);
 312
 313                 if (ACPI_FAILURE(rv))
 314                         return bus;
 315
 316                 id->Bus = bus;
 317                 id->Device = ACPI_HIWORD((ACPI_INTEGER)v);
 318                 id->Function = ACPI_LOWORD((ACPI_INTEGER)v);
 319
 320                 /* read HDR_TYPE register */
 321                 rv = AcpiOsReadPciConfiguration(id, 0x0e, &v, 8);
 322                 if (ACPI_SUCCESS(rv) &&
 323                         /* mask multifunction bit & check bridge type */
 324                         ((v & 0x7f) == 1 || (v & 0x7f) == 2)) {
 325                         /* read SECONDARY_BUS register */
 326                         rv = AcpiOsReadPciConfiguration(id, 0x19, &v, 8);
 327                         if (ACPI_SUCCESS(rv))
 328                                 id->Bus = v;
 329                 }
 330         }
 331
 332         return id->Bus;
 333 }
 334
 335 /*
 336  * AcpiOsDerivePciId:
 337  *
 338  * Derive correct PCI bus# by traversing bridges
 339  */
 340 void
 341 AcpiOsDerivePciId(
 342     ACPI_HANDLE        rhandle,
 343     ACPI_HANDLE        chandle,
 344     ACPI_PCI_ID        **PciId)
 345 {
 346         (*PciId)->Bus = get_bus_number(rhandle, chandle, PciId);
 347 }