git.oblomov.eu Git - linux-2.6/blob - drivers/pnp/pnpacpi/rsparser.c

   1 /*
   2  * pnpacpi -- PnP ACPI driver
   3  *
   4  * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr>
   5  * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com>
   6  * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
   7  *      Bjorn Helgaas <bjorn.helgaas@hp.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; either version 2, or (at your option) any
  12  * later version.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23 #include <linux/kernel.h>
  24 #include <linux/acpi.h>
  25 #include <linux/pci.h>
  26 #include <linux/pnp.h>
  27 #include "../base.h"
  28 #include "pnpacpi.h"
  29
  30 #ifdef CONFIG_IA64
  31 #define valid_IRQ(i) (1)
  32 #else
  33 #define valid_IRQ(i) (((i) != 0) && ((i) != 2))
  34 #endif
  35
  36 /*
  37  * Allocated Resources
  38  */
  39 static int irq_flags(int triggering, int polarity, int shareable)
  40 {
  41         int flags;
  42
  43         if (triggering == ACPI_LEVEL_SENSITIVE) {
  44                 if (polarity == ACPI_ACTIVE_LOW)
  45                         flags = IORESOURCE_IRQ_LOWLEVEL;
  46                 else
  47                         flags = IORESOURCE_IRQ_HIGHLEVEL;
  48         } else {
  49                 if (polarity == ACPI_ACTIVE_LOW)
  50                         flags = IORESOURCE_IRQ_LOWEDGE;
  51                 else
  52                         flags = IORESOURCE_IRQ_HIGHEDGE;
  53         }
  54
  55         if (shareable == ACPI_SHARED)
  56                 flags |= IORESOURCE_IRQ_SHAREABLE;
  57
  58         return flags;
  59 }
  60
  61 static void decode_irq_flags(struct pnp_dev *dev, int flags, int *triggering,
  62                              int *polarity, int *shareable)
  63 {
  64         switch (flags & (IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL |
  65                          IORESOURCE_IRQ_LOWEDGE  | IORESOURCE_IRQ_HIGHEDGE)) {
  66         case IORESOURCE_IRQ_LOWLEVEL:
  67                 *triggering = ACPI_LEVEL_SENSITIVE;
  68                 *polarity = ACPI_ACTIVE_LOW;
  69                 break;
  70         case IORESOURCE_IRQ_HIGHLEVEL:
  71                 *triggering = ACPI_LEVEL_SENSITIVE;
  72                 *polarity = ACPI_ACTIVE_HIGH;
  73                 break;
  74         case IORESOURCE_IRQ_LOWEDGE:
  75                 *triggering = ACPI_EDGE_SENSITIVE;
  76                 *polarity = ACPI_ACTIVE_LOW;
  77                 break;
  78         case IORESOURCE_IRQ_HIGHEDGE:
  79                 *triggering = ACPI_EDGE_SENSITIVE;
  80                 *polarity = ACPI_ACTIVE_HIGH;
  81                 break;
  82         default:
  83                 dev_err(&dev->dev, "can't encode invalid IRQ mode %#x\n",
  84                         flags);
  85                 *triggering = ACPI_EDGE_SENSITIVE;
  86                 *polarity = ACPI_ACTIVE_HIGH;
  87                 break;
  88         }
  89
  90         if (flags & IORESOURCE_IRQ_SHAREABLE)
  91                 *shareable = ACPI_SHARED;
  92         else
  93                 *shareable = ACPI_EXCLUSIVE;
  94 }
  95
  96 static void pnpacpi_parse_allocated_irqresource(struct pnp_dev *dev,
  97                                                 u32 gsi, int triggering,
  98                                                 int polarity, int shareable)
  99 {
 100         int irq, flags;
 101         int p, t;
 102
 103         if (!valid_IRQ(gsi)) {
 104                 pnp_add_irq_resource(dev, gsi, IORESOURCE_DISABLED);
 105                 return;
 106         }
 107
 108         /*
 109          * in IO-APIC mode, use overrided attribute. Two reasons:
 110          * 1. BIOS bug in DSDT
 111          * 2. BIOS uses IO-APIC mode Interrupt Source Override
 112          */
 113         if (!acpi_get_override_irq(gsi, &t, &p)) {
 114                 t = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
 115                 p = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
 116
 117                 if (triggering != t || polarity != p) {
 118                         dev_warn(&dev->dev, "IRQ %d override to %s, %s\n",
 119                                 gsi, t ? "edge":"level", p ? "low":"high");
 120                         triggering = t;
 121                         polarity = p;
 122                 }
 123         }
 124
 125         flags = irq_flags(triggering, polarity, shareable);
 126         irq = acpi_register_gsi(gsi, triggering, polarity);
 127         if (irq >= 0)
 128                 pcibios_penalize_isa_irq(irq, 1);
 129         else
 130                 flags |= IORESOURCE_DISABLED;
 131
 132         pnp_add_irq_resource(dev, irq, flags);
 133 }
 134
 135 static int dma_flags(int type, int bus_master, int transfer)
 136 {
 137         int flags = 0;
 138
 139         if (bus_master)
 140                 flags |= IORESOURCE_DMA_MASTER;
 141         switch (type) {
 142         case ACPI_COMPATIBILITY:
 143                 flags |= IORESOURCE_DMA_COMPATIBLE;
 144                 break;
 145         case ACPI_TYPE_A:
 146                 flags |= IORESOURCE_DMA_TYPEA;
 147                 break;
 148         case ACPI_TYPE_B:
 149                 flags |= IORESOURCE_DMA_TYPEB;
 150                 break;
 151         case ACPI_TYPE_F:
 152                 flags |= IORESOURCE_DMA_TYPEF;
 153                 break;
 154         default:
 155                 /* Set a default value ? */
 156                 flags |= IORESOURCE_DMA_COMPATIBLE;
 157                 pnp_err("Invalid DMA type");
 158         }
 159         switch (transfer) {
 160         case ACPI_TRANSFER_8:
 161                 flags |= IORESOURCE_DMA_8BIT;
 162                 break;
 163         case ACPI_TRANSFER_8_16:
 164                 flags |= IORESOURCE_DMA_8AND16BIT;
 165                 break;
 166         case ACPI_TRANSFER_16:
 167                 flags |= IORESOURCE_DMA_16BIT;
 168                 break;
 169         default:
 170                 /* Set a default value ? */
 171                 flags |= IORESOURCE_DMA_8AND16BIT;
 172                 pnp_err("Invalid DMA transfer type");
 173         }
 174
 175         return flags;
 176 }
 177
 178 static void pnpacpi_parse_allocated_ioresource(struct pnp_dev *dev, u64 start,
 179                                                u64 len, int io_decode)
 180 {
 181         int flags = 0;
 182         u64 end = start + len - 1;
 183
 184         if (io_decode == ACPI_DECODE_16)
 185                 flags |= IORESOURCE_IO_16BIT_ADDR;
 186         if (len == 0 || end >= 0x10003)
 187                 flags |= IORESOURCE_DISABLED;
 188
 189         pnp_add_io_resource(dev, start, end, flags);
 190 }
 191
 192 /*
 193  * Device CSRs that do not appear in PCI config space should be described
 194  * via ACPI.  This would normally be done with Address Space Descriptors
 195  * marked as "consumer-only," but old versions of Windows and Linux ignore
 196  * the producer/consumer flag, so HP invented a vendor-defined resource to
 197  * describe the location and size of CSR space.
 198  */
 199 static struct acpi_vendor_uuid hp_ccsr_uuid = {
 200         .subtype = 2,
 201         .data = { 0xf9, 0xad, 0xe9, 0x69, 0x4f, 0x92, 0x5f, 0xab, 0xf6, 0x4a,
 202             0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad },
 203 };
 204
 205 static int vendor_resource_matches(struct pnp_dev *dev,
 206                                    struct acpi_resource_vendor_typed *vendor,
 207                                    struct acpi_vendor_uuid *match,
 208                                    int expected_len)
 209 {
 210         int uuid_len = sizeof(vendor->uuid);
 211         u8 uuid_subtype = vendor->uuid_subtype;
 212         u8 *uuid = vendor->uuid;
 213         int actual_len;
 214
 215         /* byte_length includes uuid_subtype and uuid */
 216         actual_len = vendor->byte_length - uuid_len - 1;
 217
 218         if (uuid_subtype == match->subtype &&
 219             uuid_len == sizeof(match->data) &&
 220             memcmp(uuid, match->data, uuid_len) == 0) {
 221                 if (expected_len && expected_len != actual_len) {
 222                         dev_err(&dev->dev, "wrong vendor descriptor size; "
 223                                 "expected %d, found %d bytes\n",
 224                                 expected_len, actual_len);
 225                         return 0;
 226                 }
 227
 228                 return 1;
 229         }
 230
 231         return 0;
 232 }
 233
 234 static void pnpacpi_parse_allocated_vendor(struct pnp_dev *dev,
 235                                     struct acpi_resource_vendor_typed *vendor)
 236 {
 237         if (vendor_resource_matches(dev, vendor, &hp_ccsr_uuid, 16)) {
 238                 u64 start, length;
 239
 240                 memcpy(&start, vendor->byte_data, sizeof(start));
 241                 memcpy(&length, vendor->byte_data + 8, sizeof(length));
 242
 243                 pnp_add_mem_resource(dev, start, start + length - 1, 0);
 244         }
 245 }
 246
 247 static void pnpacpi_parse_allocated_memresource(struct pnp_dev *dev,
 248                                                 u64 start, u64 len,
 249                                                 int write_protect)
 250 {
 251         int flags = 0;
 252         u64 end = start + len - 1;
 253
 254         if (len == 0)
 255                 flags |= IORESOURCE_DISABLED;
 256         if (write_protect == ACPI_READ_WRITE_MEMORY)
 257                 flags |= IORESOURCE_MEM_WRITEABLE;
 258
 259         pnp_add_mem_resource(dev, start, end, flags);
 260 }
 261
 262 static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
 263                                                   struct acpi_resource *res)
 264 {
 265         struct acpi_resource_address64 addr, *p = &addr;
 266         acpi_status status;
 267
 268         status = acpi_resource_to_address64(res, p);
 269         if (!ACPI_SUCCESS(status)) {
 270                 dev_warn(&dev->dev, "failed to convert resource type %d\n",
 271                          res->type);
 272                 return;
 273         }
 274
 275         if (p->producer_consumer == ACPI_PRODUCER)
 276                 return;
 277
 278         if (p->resource_type == ACPI_MEMORY_RANGE)
 279                 pnpacpi_parse_allocated_memresource(dev,
 280                         p->minimum, p->address_length,
 281                         p->info.mem.write_protect);
 282         else if (p->resource_type == ACPI_IO_RANGE)
 283                 pnpacpi_parse_allocated_ioresource(dev,
 284                         p->minimum, p->address_length,
 285                         p->granularity == 0xfff ? ACPI_DECODE_10 :
 286                                 ACPI_DECODE_16);
 287 }
 288
 289 static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
 290                                               void *data)
 291 {
 292         struct pnp_dev *dev = data;
 293         struct acpi_resource_irq *irq;
 294         struct acpi_resource_dma *dma;
 295         struct acpi_resource_io *io;
 296         struct acpi_resource_fixed_io *fixed_io;
 297         struct acpi_resource_vendor_typed *vendor_typed;
 298         struct acpi_resource_memory24 *memory24;
 299         struct acpi_resource_memory32 *memory32;
 300         struct acpi_resource_fixed_memory32 *fixed_memory32;
 301         struct acpi_resource_extended_irq *extended_irq;
 302         int i, flags;
 303
 304         switch (res->type) {
 305         case ACPI_RESOURCE_TYPE_IRQ:
 306                 /*
 307                  * Per spec, only one interrupt per descriptor is allowed in
 308                  * _CRS, but some firmware violates this, so parse them all.
 309                  */
 310                 irq = &res->data.irq;
 311                 if (irq->interrupt_count == 0)
 312                         pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
 313                 else {
 314                         for (i = 0; i < irq->interrupt_count; i++) {
 315                                 pnpacpi_parse_allocated_irqresource(dev,
 316                                         irq->interrupts[i],
 317                                         irq->triggering,
 318                                         irq->polarity,
 319                                     irq->sharable);
 320                         }
 321
 322                         /*
 323                          * The IRQ encoder puts a single interrupt in each
 324                          * descriptor, so if a _CRS descriptor has more than
 325                          * one interrupt, we won't be able to re-encode it.
 326                          */
 327                         if (pnp_can_write(dev) && irq->interrupt_count > 1) {
 328                                 dev_warn(&dev->dev, "multiple interrupts in "
 329                                          "_CRS descriptor; configuration can't "
 330                                          "be changed\n");
 331                                 dev->capabilities &= ~PNP_WRITE;
 332                         }
 333                 }
 334                 break;
 335
 336         case ACPI_RESOURCE_TYPE_DMA:
 337                 dma = &res->data.dma;
 338                 if (dma->channel_count > 0 && dma->channels[0] != (u8) -1)
 339                         flags = dma_flags(dma->type, dma->bus_master,
 340                                           dma->transfer);
 341                 else
 342                         flags = IORESOURCE_DISABLED;
 343                 pnp_add_dma_resource(dev, dma->channels[0], flags);
 344                 break;
 345
 346         case ACPI_RESOURCE_TYPE_IO:
 347                 io = &res->data.io;
 348                 pnpacpi_parse_allocated_ioresource(dev,
 349                         io->minimum,
 350                         io->address_length,
 351                         io->io_decode);
 352                 break;
 353
 354         case ACPI_RESOURCE_TYPE_START_DEPENDENT:
 355         case ACPI_RESOURCE_TYPE_END_DEPENDENT:
 356                 break;
 357
 358         case ACPI_RESOURCE_TYPE_FIXED_IO:
 359                 fixed_io = &res->data.fixed_io;
 360                 pnpacpi_parse_allocated_ioresource(dev,
 361                         fixed_io->address,
 362                         fixed_io->address_length,
 363                         ACPI_DECODE_10);
 364                 break;
 365
 366         case ACPI_RESOURCE_TYPE_VENDOR:
 367                 vendor_typed = &res->data.vendor_typed;
 368                 pnpacpi_parse_allocated_vendor(dev, vendor_typed);
 369                 break;
 370
 371         case ACPI_RESOURCE_TYPE_END_TAG:
 372                 break;
 373
 374         case ACPI_RESOURCE_TYPE_MEMORY24:
 375                 memory24 = &res->data.memory24;
 376                 pnpacpi_parse_allocated_memresource(dev,
 377                         memory24->minimum,
 378                         memory24->address_length,
 379                         memory24->write_protect);
 380                 break;
 381         case ACPI_RESOURCE_TYPE_MEMORY32:
 382                 memory32 = &res->data.memory32;
 383                 pnpacpi_parse_allocated_memresource(dev,
 384                         memory32->minimum,
 385                         memory32->address_length,
 386                         memory32->write_protect);
 387                 break;
 388         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 389                 fixed_memory32 = &res->data.fixed_memory32;
 390                 pnpacpi_parse_allocated_memresource(dev,
 391                         fixed_memory32->address,
 392                         fixed_memory32->address_length,
 393                         fixed_memory32->write_protect);
 394                 break;
 395         case ACPI_RESOURCE_TYPE_ADDRESS16:
 396         case ACPI_RESOURCE_TYPE_ADDRESS32:
 397         case ACPI_RESOURCE_TYPE_ADDRESS64:
 398                 pnpacpi_parse_allocated_address_space(dev, res);
 399                 break;
 400
 401         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 402                 if (res->data.ext_address64.producer_consumer == ACPI_PRODUCER)
 403                         return AE_OK;
 404                 break;
 405
 406         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 407                 extended_irq = &res->data.extended_irq;
 408
 409                 if (extended_irq->interrupt_count == 0)
 410                         pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
 411                 else {
 412                         for (i = 0; i < extended_irq->interrupt_count; i++) {
 413                                 pnpacpi_parse_allocated_irqresource(dev,
 414                                         extended_irq->interrupts[i],
 415                                         extended_irq->triggering,
 416                                         extended_irq->polarity,
 417                                         extended_irq->sharable);
 418                         }
 419
 420                         /*
 421                          * The IRQ encoder puts a single interrupt in each
 422                          * descriptor, so if a _CRS descriptor has more than
 423                          * one interrupt, we won't be able to re-encode it.
 424                          */
 425                         if (pnp_can_write(dev) &&
 426                             extended_irq->interrupt_count > 1) {
 427                                 dev_warn(&dev->dev, "multiple interrupts in "
 428                                          "_CRS descriptor; configuration can't "
 429                                          "be changed\n");
 430                                 dev->capabilities &= ~PNP_WRITE;
 431                         }
 432                 }
 433                 break;
 434
 435         case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 436                 break;
 437
 438         default:
 439                 dev_warn(&dev->dev, "unknown resource type %d in _CRS\n",
 440                          res->type);
 441                 return AE_ERROR;
 442         }
 443
 444         return AE_OK;
 445 }
 446
 447 int pnpacpi_parse_allocated_resource(struct pnp_dev *dev)
 448 {
 449         acpi_handle handle = dev->data;
 450         acpi_status status;
 451
 452         dev_dbg(&dev->dev, "parse allocated resources\n");
 453
 454         pnp_init_resources(dev);
 455
 456         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 457                                      pnpacpi_allocated_resource, dev);
 458
 459         if (ACPI_FAILURE(status)) {
 460                 if (status != AE_NOT_FOUND)
 461                         dev_err(&dev->dev, "can't evaluate _CRS: %d", status);
 462                 return -EPERM;
 463         }
 464         return 0;
 465 }
 466
 467 static __init void pnpacpi_parse_dma_option(struct pnp_dev *dev,
 468                                             unsigned int option_flags,
 469                                             struct acpi_resource_dma *p)
 470 {
 471         int i;
 472         unsigned char map = 0, flags;
 473
 474         if (p->channel_count == 0)
 475                 return;
 476
 477         for (i = 0; i < p->channel_count; i++)
 478                 map |= 1 << p->channels[i];
 479
 480         flags = dma_flags(p->type, p->bus_master, p->transfer);
 481         pnp_register_dma_resource(dev, option_flags, map, flags);
 482 }
 483
 484 static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev,
 485                                             unsigned int option_flags,
 486                                             struct acpi_resource_irq *p)
 487 {
 488         int i;
 489         pnp_irq_mask_t map;
 490         unsigned char flags;
 491
 492         if (p->interrupt_count == 0)
 493                 return;
 494
 495         bitmap_zero(map.bits, PNP_IRQ_NR);
 496         for (i = 0; i < p->interrupt_count; i++)
 497                 if (p->interrupts[i])
 498                         __set_bit(p->interrupts[i], map.bits);
 499
 500         flags = irq_flags(p->triggering, p->polarity, p->sharable);
 501         pnp_register_irq_resource(dev, option_flags, &map, flags);
 502 }
 503
 504 static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev,
 505                                         unsigned int option_flags,
 506                                         struct acpi_resource_extended_irq *p)
 507 {
 508         int i;
 509         pnp_irq_mask_t map;
 510         unsigned char flags;
 511
 512         if (p->interrupt_count == 0)
 513                 return;
 514
 515         bitmap_zero(map.bits, PNP_IRQ_NR);
 516         for (i = 0; i < p->interrupt_count; i++) {
 517                 if (p->interrupts[i]) {
 518                         if (p->interrupts[i] < PNP_IRQ_NR)
 519                                 __set_bit(p->interrupts[i], map.bits);
 520                         else
 521                                 dev_err(&dev->dev, "ignoring IRQ %d option "
 522                                         "(too large for %d entry bitmap)\n",
 523                                         p->interrupts[i], PNP_IRQ_NR);
 524                 }
 525         }
 526
 527         flags = irq_flags(p->triggering, p->polarity, p->sharable);
 528         pnp_register_irq_resource(dev, option_flags, &map, flags);
 529 }
 530
 531 static __init void pnpacpi_parse_port_option(struct pnp_dev *dev,
 532                                              unsigned int option_flags,
 533                                              struct acpi_resource_io *io)
 534 {
 535         unsigned char flags = 0;
 536
 537         if (io->address_length == 0)
 538                 return;
 539
 540         if (io->io_decode == ACPI_DECODE_16)
 541                 flags = IORESOURCE_IO_16BIT_ADDR;
 542         pnp_register_port_resource(dev, option_flags, io->minimum, io->maximum,
 543                                    io->alignment, io->address_length, flags);
 544 }
 545
 546 static __init void pnpacpi_parse_fixed_port_option(struct pnp_dev *dev,
 547                                         unsigned int option_flags,
 548                                         struct acpi_resource_fixed_io *io)
 549 {
 550         if (io->address_length == 0)
 551                 return;
 552
 553         pnp_register_port_resource(dev, option_flags, io->address, io->address,
 554                                    0, io->address_length, IORESOURCE_IO_FIXED);
 555 }
 556
 557 static __init void pnpacpi_parse_mem24_option(struct pnp_dev *dev,
 558                                               unsigned int option_flags,
 559                                               struct acpi_resource_memory24 *p)
 560 {
 561         unsigned char flags = 0;
 562
 563         if (p->address_length == 0)
 564                 return;
 565
 566         if (p->write_protect == ACPI_READ_WRITE_MEMORY)
 567                 flags = IORESOURCE_MEM_WRITEABLE;
 568         pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
 569                                   p->alignment, p->address_length, flags);
 570 }
 571
 572 static __init void pnpacpi_parse_mem32_option(struct pnp_dev *dev,
 573                                               unsigned int option_flags,
 574                                               struct acpi_resource_memory32 *p)
 575 {
 576         unsigned char flags = 0;
 577
 578         if (p->address_length == 0)
 579                 return;
 580
 581         if (p->write_protect == ACPI_READ_WRITE_MEMORY)
 582                 flags = IORESOURCE_MEM_WRITEABLE;
 583         pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
 584                                   p->alignment, p->address_length, flags);
 585 }
 586
 587 static __init void pnpacpi_parse_fixed_mem32_option(struct pnp_dev *dev,
 588                                         unsigned int option_flags,
 589                                         struct acpi_resource_fixed_memory32 *p)
 590 {
 591         unsigned char flags = 0;
 592
 593         if (p->address_length == 0)
 594                 return;
 595
 596         if (p->write_protect == ACPI_READ_WRITE_MEMORY)
 597                 flags = IORESOURCE_MEM_WRITEABLE;
 598         pnp_register_mem_resource(dev, option_flags, p->address, p->address,
 599                                   0, p->address_length, flags);
 600 }
 601
 602 static __init void pnpacpi_parse_address_option(struct pnp_dev *dev,
 603                                                 unsigned int option_flags,
 604                                                 struct acpi_resource *r)
 605 {
 606         struct acpi_resource_address64 addr, *p = &addr;
 607         acpi_status status;
 608         unsigned char flags = 0;
 609
 610         status = acpi_resource_to_address64(r, p);
 611         if (!ACPI_SUCCESS(status)) {
 612                 pnp_warn("PnPACPI: failed to convert resource type %d",
 613                          r->type);
 614                 return;
 615         }
 616
 617         if (p->address_length == 0)
 618                 return;
 619
 620         if (p->resource_type == ACPI_MEMORY_RANGE) {
 621                 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
 622                         flags = IORESOURCE_MEM_WRITEABLE;
 623                 pnp_register_mem_resource(dev, option_flags, p->minimum,
 624                                           p->minimum, 0, p->address_length,
 625                                           flags);
 626         } else if (p->resource_type == ACPI_IO_RANGE)
 627                 pnp_register_port_resource(dev, option_flags, p->minimum,
 628                                            p->minimum, 0, p->address_length,
 629                                            IORESOURCE_IO_FIXED);
 630 }
 631
 632 struct acpipnp_parse_option_s {
 633         struct pnp_dev *dev;
 634         unsigned int option_flags;
 635 };
 636
 637 static __init acpi_status pnpacpi_option_resource(struct acpi_resource *res,
 638                                                   void *data)
 639 {
 640         int priority;
 641         struct acpipnp_parse_option_s *parse_data = data;
 642         struct pnp_dev *dev = parse_data->dev;
 643         unsigned int option_flags = parse_data->option_flags;
 644
 645         switch (res->type) {
 646         case ACPI_RESOURCE_TYPE_IRQ:
 647                 pnpacpi_parse_irq_option(dev, option_flags, &res->data.irq);
 648                 break;
 649
 650         case ACPI_RESOURCE_TYPE_DMA:
 651                 pnpacpi_parse_dma_option(dev, option_flags, &res->data.dma);
 652                 break;
 653
 654         case ACPI_RESOURCE_TYPE_START_DEPENDENT:
 655                 switch (res->data.start_dpf.compatibility_priority) {
 656                 case ACPI_GOOD_CONFIGURATION:
 657                         priority = PNP_RES_PRIORITY_PREFERRED;
 658                         break;
 659
 660                 case ACPI_ACCEPTABLE_CONFIGURATION:
 661                         priority = PNP_RES_PRIORITY_ACCEPTABLE;
 662                         break;
 663
 664                 case ACPI_SUB_OPTIMAL_CONFIGURATION:
 665                         priority = PNP_RES_PRIORITY_FUNCTIONAL;
 666                         break;
 667                 default:
 668                         priority = PNP_RES_PRIORITY_INVALID;
 669                         break;
 670                 }
 671                 parse_data->option_flags = pnp_new_dependent_set(dev, priority);
 672                 break;
 673
 674         case ACPI_RESOURCE_TYPE_END_DEPENDENT:
 675                 parse_data->option_flags = 0;
 676                 break;
 677
 678         case ACPI_RESOURCE_TYPE_IO:
 679                 pnpacpi_parse_port_option(dev, option_flags, &res->data.io);
 680                 break;
 681
 682         case ACPI_RESOURCE_TYPE_FIXED_IO:
 683                 pnpacpi_parse_fixed_port_option(dev, option_flags,
 684                                                 &res->data.fixed_io);
 685                 break;
 686
 687         case ACPI_RESOURCE_TYPE_VENDOR:
 688         case ACPI_RESOURCE_TYPE_END_TAG:
 689                 break;
 690
 691         case ACPI_RESOURCE_TYPE_MEMORY24:
 692                 pnpacpi_parse_mem24_option(dev, option_flags,
 693                                            &res->data.memory24);
 694                 break;
 695
 696         case ACPI_RESOURCE_TYPE_MEMORY32:
 697                 pnpacpi_parse_mem32_option(dev, option_flags,
 698                                            &res->data.memory32);
 699                 break;
 700
 701         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 702                 pnpacpi_parse_fixed_mem32_option(dev, option_flags,
 703                                                  &res->data.fixed_memory32);
 704                 break;
 705
 706         case ACPI_RESOURCE_TYPE_ADDRESS16:
 707         case ACPI_RESOURCE_TYPE_ADDRESS32:
 708         case ACPI_RESOURCE_TYPE_ADDRESS64:
 709                 pnpacpi_parse_address_option(dev, option_flags, res);
 710                 break;
 711
 712         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 713                 break;
 714
 715         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 716                 pnpacpi_parse_ext_irq_option(dev, option_flags,
 717                                              &res->data.extended_irq);
 718                 break;
 719
 720         case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 721                 break;
 722
 723         default:
 724                 dev_warn(&dev->dev, "unknown resource type %d in _PRS\n",
 725                          res->type);
 726                 return AE_ERROR;
 727         }
 728
 729         return AE_OK;
 730 }
 731
 732 int __init pnpacpi_parse_resource_option_data(struct pnp_dev *dev)
 733 {
 734         acpi_handle handle = dev->data;
 735         acpi_status status;
 736         struct acpipnp_parse_option_s parse_data;
 737
 738         dev_dbg(&dev->dev, "parse resource options\n");
 739
 740         parse_data.dev = dev;
 741         parse_data.option_flags = 0;
 742
 743         status = acpi_walk_resources(handle, METHOD_NAME__PRS,
 744                                      pnpacpi_option_resource, &parse_data);
 745
 746         if (ACPI_FAILURE(status)) {
 747                 if (status != AE_NOT_FOUND)
 748                         dev_err(&dev->dev, "can't evaluate _PRS: %d", status);
 749                 return -EPERM;
 750         }
 751         return 0;
 752 }
 753
 754 static int pnpacpi_supported_resource(struct acpi_resource *res)
 755 {
 756         switch (res->type) {
 757         case ACPI_RESOURCE_TYPE_IRQ:
 758         case ACPI_RESOURCE_TYPE_DMA:
 759         case ACPI_RESOURCE_TYPE_IO:
 760         case ACPI_RESOURCE_TYPE_FIXED_IO:
 761         case ACPI_RESOURCE_TYPE_MEMORY24:
 762         case ACPI_RESOURCE_TYPE_MEMORY32:
 763         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 764         case ACPI_RESOURCE_TYPE_ADDRESS16:
 765         case ACPI_RESOURCE_TYPE_ADDRESS32:
 766         case ACPI_RESOURCE_TYPE_ADDRESS64:
 767         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 768                 return 1;
 769         }
 770         return 0;
 771 }
 772
 773 /*
 774  * Set resource
 775  */
 776 static acpi_status pnpacpi_count_resources(struct acpi_resource *res,
 777                                            void *data)
 778 {
 779         int *res_cnt = data;
 780
 781         if (pnpacpi_supported_resource(res))
 782                 (*res_cnt)++;
 783         return AE_OK;
 784 }
 785
 786 static acpi_status pnpacpi_type_resources(struct acpi_resource *res, void *data)
 787 {
 788         struct acpi_resource **resource = data;
 789
 790         if (pnpacpi_supported_resource(res)) {
 791                 (*resource)->type = res->type;
 792                 (*resource)->length = sizeof(struct acpi_resource);
 793                 if (res->type == ACPI_RESOURCE_TYPE_IRQ)
 794                         (*resource)->data.irq.descriptor_length =
 795                                         res->data.irq.descriptor_length;
 796                 (*resource)++;
 797         }
 798
 799         return AE_OK;
 800 }
 801
 802 int pnpacpi_build_resource_template(struct pnp_dev *dev,
 803                                     struct acpi_buffer *buffer)
 804 {
 805         acpi_handle handle = dev->data;
 806         struct acpi_resource *resource;
 807         int res_cnt = 0;
 808         acpi_status status;
 809
 810         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 811                                      pnpacpi_count_resources, &res_cnt);
 812         if (ACPI_FAILURE(status)) {
 813                 dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
 814                 return -EINVAL;
 815         }
 816         if (!res_cnt)
 817                 return -EINVAL;
 818         buffer->length = sizeof(struct acpi_resource) * (res_cnt + 1) + 1;
 819         buffer->pointer = kzalloc(buffer->length - 1, GFP_KERNEL);
 820         if (!buffer->pointer)
 821                 return -ENOMEM;
 822
 823         resource = (struct acpi_resource *)buffer->pointer;
 824         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 825                                      pnpacpi_type_resources, &resource);
 826         if (ACPI_FAILURE(status)) {
 827                 kfree(buffer->pointer);
 828                 dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
 829                 return -EINVAL;
 830         }
 831         /* resource will pointer the end resource now */
 832         resource->type = ACPI_RESOURCE_TYPE_END_TAG;
 833
 834         return 0;
 835 }
 836
 837 static void pnpacpi_encode_irq(struct pnp_dev *dev,
 838                                struct acpi_resource *resource,
 839                                struct resource *p)
 840 {
 841         struct acpi_resource_irq *irq = &resource->data.irq;
 842         int triggering, polarity, shareable;
 843
 844         if (!pnp_resource_enabled(p)) {
 845                 irq->interrupt_count = 0;
 846                 dev_dbg(&dev->dev, "  encode irq (%s)\n",
 847                         p ? "disabled" : "missing");
 848                 return;
 849         }
 850
 851         decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
 852         irq->triggering = triggering;
 853         irq->polarity = polarity;
 854         irq->sharable = shareable;
 855         irq->interrupt_count = 1;
 856         irq->interrupts[0] = p->start;
 857
 858         dev_dbg(&dev->dev, "  encode irq %d %s %s %s (%d-byte descriptor)\n",
 859                 (int) p->start,
 860                 triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
 861                 polarity == ACPI_ACTIVE_LOW ? "low" : "high",
 862                 irq->sharable == ACPI_SHARED ? "shared" : "exclusive",
 863                 irq->descriptor_length);
 864 }
 865
 866 static void pnpacpi_encode_ext_irq(struct pnp_dev *dev,
 867                                    struct acpi_resource *resource,
 868                                    struct resource *p)
 869 {
 870         struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq;
 871         int triggering, polarity, shareable;
 872
 873         if (!pnp_resource_enabled(p)) {
 874                 extended_irq->interrupt_count = 0;
 875                 dev_dbg(&dev->dev, "  encode extended irq (%s)\n",
 876                         p ? "disabled" : "missing");
 877                 return;
 878         }
 879
 880         decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
 881         extended_irq->producer_consumer = ACPI_CONSUMER;
 882         extended_irq->triggering = triggering;
 883         extended_irq->polarity = polarity;
 884         extended_irq->sharable = shareable;
 885         extended_irq->interrupt_count = 1;
 886         extended_irq->interrupts[0] = p->start;
 887
 888         dev_dbg(&dev->dev, "  encode irq %d %s %s %s\n", (int) p->start,
 889                 triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
 890                 polarity == ACPI_ACTIVE_LOW ? "low" : "high",
 891                 extended_irq->sharable == ACPI_SHARED ? "shared" : "exclusive");
 892 }
 893
 894 static void pnpacpi_encode_dma(struct pnp_dev *dev,
 895                                struct acpi_resource *resource,
 896                                struct resource *p)
 897 {
 898         struct acpi_resource_dma *dma = &resource->data.dma;
 899
 900         if (!pnp_resource_enabled(p)) {
 901                 dma->channel_count = 0;
 902                 dev_dbg(&dev->dev, "  encode dma (%s)\n",
 903                         p ? "disabled" : "missing");
 904                 return;
 905         }
 906
 907         /* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */
 908         switch (p->flags & IORESOURCE_DMA_SPEED_MASK) {
 909         case IORESOURCE_DMA_TYPEA:
 910                 dma->type = ACPI_TYPE_A;
 911                 break;
 912         case IORESOURCE_DMA_TYPEB:
 913                 dma->type = ACPI_TYPE_B;
 914                 break;
 915         case IORESOURCE_DMA_TYPEF:
 916                 dma->type = ACPI_TYPE_F;
 917                 break;
 918         default:
 919                 dma->type = ACPI_COMPATIBILITY;
 920         }
 921
 922         switch (p->flags & IORESOURCE_DMA_TYPE_MASK) {
 923         case IORESOURCE_DMA_8BIT:
 924                 dma->transfer = ACPI_TRANSFER_8;
 925                 break;
 926         case IORESOURCE_DMA_8AND16BIT:
 927                 dma->transfer = ACPI_TRANSFER_8_16;
 928                 break;
 929         default:
 930                 dma->transfer = ACPI_TRANSFER_16;
 931         }
 932
 933         dma->bus_master = !!(p->flags & IORESOURCE_DMA_MASTER);
 934         dma->channel_count = 1;
 935         dma->channels[0] = p->start;
 936
 937         dev_dbg(&dev->dev, "  encode dma %d "
 938                 "type %#x transfer %#x master %d\n",
 939                 (int) p->start, dma->type, dma->transfer, dma->bus_master);
 940 }
 941
 942 static void pnpacpi_encode_io(struct pnp_dev *dev,
 943                               struct acpi_resource *resource,
 944                               struct resource *p)
 945 {
 946         struct acpi_resource_io *io = &resource->data.io;
 947
 948         if (pnp_resource_enabled(p)) {
 949                 /* Note: pnp_assign_port copies pnp_port->flags into p->flags */
 950                 io->io_decode = (p->flags & IORESOURCE_IO_16BIT_ADDR) ?
 951                     ACPI_DECODE_16 : ACPI_DECODE_10;
 952                 io->minimum = p->start;
 953                 io->maximum = p->end;
 954                 io->alignment = 0;      /* Correct? */
 955                 io->address_length = p->end - p->start + 1;
 956         } else {
 957                 io->minimum = 0;
 958                 io->address_length = 0;
 959         }
 960
 961         dev_dbg(&dev->dev, "  encode io %#x-%#x decode %#x\n", io->minimum,
 962                 io->minimum + io->address_length - 1, io->io_decode);
 963 }
 964
 965 static void pnpacpi_encode_fixed_io(struct pnp_dev *dev,
 966                                     struct acpi_resource *resource,
 967                                     struct resource *p)
 968 {
 969         struct acpi_resource_fixed_io *fixed_io = &resource->data.fixed_io;
 970
 971         if (pnp_resource_enabled(p)) {
 972                 fixed_io->address = p->start;
 973                 fixed_io->address_length = p->end - p->start + 1;
 974         } else {
 975                 fixed_io->address = 0;
 976                 fixed_io->address_length = 0;
 977         }
 978
 979         dev_dbg(&dev->dev, "  encode fixed_io %#x-%#x\n", fixed_io->address,
 980                 fixed_io->address + fixed_io->address_length - 1);
 981 }
 982
 983 static void pnpacpi_encode_mem24(struct pnp_dev *dev,
 984                                  struct acpi_resource *resource,
 985                                  struct resource *p)
 986 {
 987         struct acpi_resource_memory24 *memory24 = &resource->data.memory24;
 988
 989         if (pnp_resource_enabled(p)) {
 990                 /* Note: pnp_assign_mem copies pnp_mem->flags into p->flags */
 991                 memory24->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
 992                     ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
 993                 memory24->minimum = p->start;
 994                 memory24->maximum = p->end;
 995                 memory24->alignment = 0;
 996                 memory24->address_length = p->end - p->start + 1;
 997         } else {
 998                 memory24->minimum = 0;
 999                 memory24->address_length = 0;
1000         }
1001
1002         dev_dbg(&dev->dev, "  encode mem24 %#x-%#x write_protect %#x\n",
1003                 memory24->minimum,
1004                 memory24->minimum + memory24->address_length - 1,
1005                 memory24->write_protect);
1006 }
1007
1008 static void pnpacpi_encode_mem32(struct pnp_dev *dev,
1009                                  struct acpi_resource *resource,
1010                                  struct resource *p)
1011 {
1012         struct acpi_resource_memory32 *memory32 = &resource->data.memory32;
1013
1014         if (pnp_resource_enabled(p)) {
1015                 memory32->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
1016                     ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1017                 memory32->minimum = p->start;
1018                 memory32->maximum = p->end;
1019                 memory32->alignment = 0;
1020                 memory32->address_length = p->end - p->start + 1;
1021         } else {
1022                 memory32->minimum = 0;
1023                 memory32->alignment = 0;
1024         }
1025
1026         dev_dbg(&dev->dev, "  encode mem32 %#x-%#x write_protect %#x\n",
1027                 memory32->minimum,
1028                 memory32->minimum + memory32->address_length - 1,
1029                 memory32->write_protect);
1030 }
1031
1032 static void pnpacpi_encode_fixed_mem32(struct pnp_dev *dev,
1033                                        struct acpi_resource *resource,
1034                                        struct resource *p)
1035 {
1036         struct acpi_resource_fixed_memory32 *fixed_memory32 = &resource->data.fixed_memory32;
1037
1038         if (pnp_resource_enabled(p)) {
1039                 fixed_memory32->write_protect =
1040                     p->flags & IORESOURCE_MEM_WRITEABLE ?
1041                     ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1042                 fixed_memory32->address = p->start;
1043                 fixed_memory32->address_length = p->end - p->start + 1;
1044         } else {
1045                 fixed_memory32->address = 0;
1046                 fixed_memory32->address_length = 0;
1047         }
1048
1049         dev_dbg(&dev->dev, "  encode fixed_mem32 %#x-%#x write_protect %#x\n",
1050                 fixed_memory32->address,
1051                 fixed_memory32->address + fixed_memory32->address_length - 1,
1052                 fixed_memory32->write_protect);
1053 }
1054
1055 int pnpacpi_encode_resources(struct pnp_dev *dev, struct acpi_buffer *buffer)
1056 {
1057         int i = 0;
1058         /* pnpacpi_build_resource_template allocates extra mem */
1059         int res_cnt = (buffer->length - 1) / sizeof(struct acpi_resource) - 1;
1060         struct acpi_resource *resource = buffer->pointer;
1061         int port = 0, irq = 0, dma = 0, mem = 0;
1062
1063         dev_dbg(&dev->dev, "encode %d resources\n", res_cnt);
1064         while (i < res_cnt) {
1065                 switch (resource->type) {
1066                 case ACPI_RESOURCE_TYPE_IRQ:
1067                         pnpacpi_encode_irq(dev, resource,
1068                                pnp_get_resource(dev, IORESOURCE_IRQ, irq));
1069                         irq++;
1070                         break;
1071
1072                 case ACPI_RESOURCE_TYPE_DMA:
1073                         pnpacpi_encode_dma(dev, resource,
1074                                 pnp_get_resource(dev, IORESOURCE_DMA, dma));
1075                         dma++;
1076                         break;
1077                 case ACPI_RESOURCE_TYPE_IO:
1078                         pnpacpi_encode_io(dev, resource,
1079                                 pnp_get_resource(dev, IORESOURCE_IO, port));
1080                         port++;
1081                         break;
1082                 case ACPI_RESOURCE_TYPE_FIXED_IO:
1083                         pnpacpi_encode_fixed_io(dev, resource,
1084                                 pnp_get_resource(dev, IORESOURCE_IO, port));
1085                         port++;
1086                         break;
1087                 case ACPI_RESOURCE_TYPE_MEMORY24:
1088                         pnpacpi_encode_mem24(dev, resource,
1089                                 pnp_get_resource(dev, IORESOURCE_MEM, mem));
1090                         mem++;
1091                         break;
1092                 case ACPI_RESOURCE_TYPE_MEMORY32:
1093                         pnpacpi_encode_mem32(dev, resource,
1094                                 pnp_get_resource(dev, IORESOURCE_MEM, mem));
1095                         mem++;
1096                         break;
1097                 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
1098                         pnpacpi_encode_fixed_mem32(dev, resource,
1099                                 pnp_get_resource(dev, IORESOURCE_MEM, mem));
1100                         mem++;
1101                         break;
1102                 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
1103                         pnpacpi_encode_ext_irq(dev, resource,
1104                                 pnp_get_resource(dev, IORESOURCE_IRQ, irq));
1105                         irq++;
1106                         break;
1107                 case ACPI_RESOURCE_TYPE_START_DEPENDENT:
1108                 case ACPI_RESOURCE_TYPE_END_DEPENDENT:
1109                 case ACPI_RESOURCE_TYPE_VENDOR:
1110                 case ACPI_RESOURCE_TYPE_END_TAG:
1111                 case ACPI_RESOURCE_TYPE_ADDRESS16:
1112                 case ACPI_RESOURCE_TYPE_ADDRESS32:
1113                 case ACPI_RESOURCE_TYPE_ADDRESS64:
1114                 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
1115                 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
1116                 default:        /* other type */
1117                         dev_warn(&dev->dev, "can't encode unknown resource "
1118                                  "type %d\n", resource->type);
1119                         return -EINVAL;
1120                 }
1121                 resource++;
1122                 i++;
1123         }
1124         return 0;
1125 }