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(&dev->dev, 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(struct pnp_dev *dev, int type, int bus_master,
 136                      int transfer)
 137 {
 138         int flags = 0;
 139
 140         if (bus_master)
 141                 flags |= IORESOURCE_DMA_MASTER;
 142         switch (type) {
 143         case ACPI_COMPATIBILITY:
 144                 flags |= IORESOURCE_DMA_COMPATIBLE;
 145                 break;
 146         case ACPI_TYPE_A:
 147                 flags |= IORESOURCE_DMA_TYPEA;
 148                 break;
 149         case ACPI_TYPE_B:
 150                 flags |= IORESOURCE_DMA_TYPEB;
 151                 break;
 152         case ACPI_TYPE_F:
 153                 flags |= IORESOURCE_DMA_TYPEF;
 154                 break;
 155         default:
 156                 /* Set a default value ? */
 157                 flags |= IORESOURCE_DMA_COMPATIBLE;
 158                 dev_err(&dev->dev, "invalid DMA type %d\n", type);
 159         }
 160         switch (transfer) {
 161         case ACPI_TRANSFER_8:
 162                 flags |= IORESOURCE_DMA_8BIT;
 163                 break;
 164         case ACPI_TRANSFER_8_16:
 165                 flags |= IORESOURCE_DMA_8AND16BIT;
 166                 break;
 167         case ACPI_TRANSFER_16:
 168                 flags |= IORESOURCE_DMA_16BIT;
 169                 break;
 170         default:
 171                 /* Set a default value ? */
 172                 flags |= IORESOURCE_DMA_8AND16BIT;
 173                 dev_err(&dev->dev, "invalid DMA transfer type %d\n", transfer);
 174         }
 175
 176         return flags;
 177 }
 178
 179 static void pnpacpi_parse_allocated_ioresource(struct pnp_dev *dev, u64 start,
 180                                                u64 len, int io_decode)
 181 {
 182         int flags = 0;
 183         u64 end = start + len - 1;
 184
 185         if (io_decode == ACPI_DECODE_16)
 186                 flags |= IORESOURCE_IO_16BIT_ADDR;
 187         if (len == 0 || end >= 0x10003)
 188                 flags |= IORESOURCE_DISABLED;
 189
 190         pnp_add_io_resource(dev, start, end, flags);
 191 }
 192
 193 /*
 194  * Device CSRs that do not appear in PCI config space should be described
 195  * via ACPI.  This would normally be done with Address Space Descriptors
 196  * marked as "consumer-only," but old versions of Windows and Linux ignore
 197  * the producer/consumer flag, so HP invented a vendor-defined resource to
 198  * describe the location and size of CSR space.
 199  */
 200 static struct acpi_vendor_uuid hp_ccsr_uuid = {
 201         .subtype = 2,
 202         .data = { 0xf9, 0xad, 0xe9, 0x69, 0x4f, 0x92, 0x5f, 0xab, 0xf6, 0x4a,
 203             0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad },
 204 };
 205
 206 static int vendor_resource_matches(struct pnp_dev *dev,
 207                                    struct acpi_resource_vendor_typed *vendor,
 208                                    struct acpi_vendor_uuid *match,
 209                                    int expected_len)
 210 {
 211         int uuid_len = sizeof(vendor->uuid);
 212         u8 uuid_subtype = vendor->uuid_subtype;
 213         u8 *uuid = vendor->uuid;
 214         int actual_len;
 215
 216         /* byte_length includes uuid_subtype and uuid */
 217         actual_len = vendor->byte_length - uuid_len - 1;
 218
 219         if (uuid_subtype == match->subtype &&
 220             uuid_len == sizeof(match->data) &&
 221             memcmp(uuid, match->data, uuid_len) == 0) {
 222                 if (expected_len && expected_len != actual_len) {
 223                         dev_err(&dev->dev, "wrong vendor descriptor size; "
 224                                 "expected %d, found %d bytes\n",
 225                                 expected_len, actual_len);
 226                         return 0;
 227                 }
 228
 229                 return 1;
 230         }
 231
 232         return 0;
 233 }
 234
 235 static void pnpacpi_parse_allocated_vendor(struct pnp_dev *dev,
 236                                     struct acpi_resource_vendor_typed *vendor)
 237 {
 238         if (vendor_resource_matches(dev, vendor, &hp_ccsr_uuid, 16)) {
 239                 u64 start, length;
 240
 241                 memcpy(&start, vendor->byte_data, sizeof(start));
 242                 memcpy(&length, vendor->byte_data + 8, sizeof(length));
 243
 244                 pnp_add_mem_resource(dev, start, start + length - 1, 0);
 245         }
 246 }
 247
 248 static void pnpacpi_parse_allocated_memresource(struct pnp_dev *dev,
 249                                                 u64 start, u64 len,
 250                                                 int write_protect)
 251 {
 252         int flags = 0;
 253         u64 end = start + len - 1;
 254
 255         if (len == 0)
 256                 flags |= IORESOURCE_DISABLED;
 257         if (write_protect == ACPI_READ_WRITE_MEMORY)
 258                 flags |= IORESOURCE_MEM_WRITEABLE;
 259
 260         pnp_add_mem_resource(dev, start, end, flags);
 261 }
 262
 263 static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
 264                                                   struct acpi_resource *res)
 265 {
 266         struct acpi_resource_address64 addr, *p = &addr;
 267         acpi_status status;
 268
 269         status = acpi_resource_to_address64(res, p);
 270         if (!ACPI_SUCCESS(status)) {
 271                 dev_warn(&dev->dev, "failed to convert resource type %d\n",
 272                          res->type);
 273                 return;
 274         }
 275
 276         if (p->producer_consumer == ACPI_PRODUCER)
 277                 return;
 278
 279         if (p->resource_type == ACPI_MEMORY_RANGE)
 280                 pnpacpi_parse_allocated_memresource(dev,
 281                         p->minimum, p->address_length,
 282                         p->info.mem.write_protect);
 283         else if (p->resource_type == ACPI_IO_RANGE)
 284                 pnpacpi_parse_allocated_ioresource(dev,
 285                         p->minimum, p->address_length,
 286                         p->granularity == 0xfff ? ACPI_DECODE_10 :
 287                                 ACPI_DECODE_16);
 288 }
 289
 290 static void pnpacpi_parse_allocated_ext_address_space(struct pnp_dev *dev,
 291                                                       struct acpi_resource *res)
 292 {
 293         struct acpi_resource_extended_address64 *p = &res->data.ext_address64;
 294
 295         if (p->producer_consumer == ACPI_PRODUCER)
 296                 return;
 297
 298         if (p->resource_type == ACPI_MEMORY_RANGE)
 299                 pnpacpi_parse_allocated_memresource(dev,
 300                         p->minimum, p->address_length,
 301                         p->info.mem.write_protect);
 302         else if (p->resource_type == ACPI_IO_RANGE)
 303                 pnpacpi_parse_allocated_ioresource(dev,
 304                         p->minimum, p->address_length,
 305                         p->granularity == 0xfff ? ACPI_DECODE_10 :
 306                                 ACPI_DECODE_16);
 307 }
 308
 309 static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
 310                                               void *data)
 311 {
 312         struct pnp_dev *dev = data;
 313         struct acpi_resource_irq *irq;
 314         struct acpi_resource_dma *dma;
 315         struct acpi_resource_io *io;
 316         struct acpi_resource_fixed_io *fixed_io;
 317         struct acpi_resource_vendor_typed *vendor_typed;
 318         struct acpi_resource_memory24 *memory24;
 319         struct acpi_resource_memory32 *memory32;
 320         struct acpi_resource_fixed_memory32 *fixed_memory32;
 321         struct acpi_resource_extended_irq *extended_irq;
 322         int i, flags;
 323
 324         switch (res->type) {
 325         case ACPI_RESOURCE_TYPE_IRQ:
 326                 /*
 327                  * Per spec, only one interrupt per descriptor is allowed in
 328                  * _CRS, but some firmware violates this, so parse them all.
 329                  */
 330                 irq = &res->data.irq;
 331                 if (irq->interrupt_count == 0)
 332                         pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
 333                 else {
 334                         for (i = 0; i < irq->interrupt_count; i++) {
 335                                 pnpacpi_parse_allocated_irqresource(dev,
 336                                         irq->interrupts[i],
 337                                         irq->triggering,
 338                                         irq->polarity,
 339                                     irq->sharable);
 340                         }
 341
 342                         /*
 343                          * The IRQ encoder puts a single interrupt in each
 344                          * descriptor, so if a _CRS descriptor has more than
 345                          * one interrupt, we won't be able to re-encode it.
 346                          */
 347                         if (pnp_can_write(dev) && irq->interrupt_count > 1) {
 348                                 dev_warn(&dev->dev, "multiple interrupts in "
 349                                          "_CRS descriptor; configuration can't "
 350                                          "be changed\n");
 351                                 dev->capabilities &= ~PNP_WRITE;
 352                         }
 353                 }
 354                 break;
 355
 356         case ACPI_RESOURCE_TYPE_DMA:
 357                 dma = &res->data.dma;
 358                 if (dma->channel_count > 0 && dma->channels[0] != (u8) -1)
 359                         flags = dma_flags(dev, dma->type, dma->bus_master,
 360                                           dma->transfer);
 361                 else
 362                         flags = IORESOURCE_DISABLED;
 363                 pnp_add_dma_resource(dev, dma->channels[0], flags);
 364                 break;
 365
 366         case ACPI_RESOURCE_TYPE_IO:
 367                 io = &res->data.io;
 368                 pnpacpi_parse_allocated_ioresource(dev,
 369                         io->minimum,
 370                         io->address_length,
 371                         io->io_decode);
 372                 break;
 373
 374         case ACPI_RESOURCE_TYPE_START_DEPENDENT:
 375         case ACPI_RESOURCE_TYPE_END_DEPENDENT:
 376                 break;
 377
 378         case ACPI_RESOURCE_TYPE_FIXED_IO:
 379                 fixed_io = &res->data.fixed_io;
 380                 pnpacpi_parse_allocated_ioresource(dev,
 381                         fixed_io->address,
 382                         fixed_io->address_length,
 383                         ACPI_DECODE_10);
 384                 break;
 385
 386         case ACPI_RESOURCE_TYPE_VENDOR:
 387                 vendor_typed = &res->data.vendor_typed;
 388                 pnpacpi_parse_allocated_vendor(dev, vendor_typed);
 389                 break;
 390
 391         case ACPI_RESOURCE_TYPE_END_TAG:
 392                 break;
 393
 394         case ACPI_RESOURCE_TYPE_MEMORY24:
 395                 memory24 = &res->data.memory24;
 396                 pnpacpi_parse_allocated_memresource(dev,
 397                         memory24->minimum,
 398                         memory24->address_length,
 399                         memory24->write_protect);
 400                 break;
 401         case ACPI_RESOURCE_TYPE_MEMORY32:
 402                 memory32 = &res->data.memory32;
 403                 pnpacpi_parse_allocated_memresource(dev,
 404                         memory32->minimum,
 405                         memory32->address_length,
 406                         memory32->write_protect);
 407                 break;
 408         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 409                 fixed_memory32 = &res->data.fixed_memory32;
 410                 pnpacpi_parse_allocated_memresource(dev,
 411                         fixed_memory32->address,
 412                         fixed_memory32->address_length,
 413                         fixed_memory32->write_protect);
 414                 break;
 415         case ACPI_RESOURCE_TYPE_ADDRESS16:
 416         case ACPI_RESOURCE_TYPE_ADDRESS32:
 417         case ACPI_RESOURCE_TYPE_ADDRESS64:
 418                 pnpacpi_parse_allocated_address_space(dev, res);
 419                 break;
 420
 421         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 422                 pnpacpi_parse_allocated_ext_address_space(dev, res);
 423                 break;
 424
 425         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 426                 extended_irq = &res->data.extended_irq;
 427
 428                 if (extended_irq->interrupt_count == 0)
 429                         pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
 430                 else {
 431                         for (i = 0; i < extended_irq->interrupt_count; i++) {
 432                                 pnpacpi_parse_allocated_irqresource(dev,
 433                                         extended_irq->interrupts[i],
 434                                         extended_irq->triggering,
 435                                         extended_irq->polarity,
 436                                         extended_irq->sharable);
 437                         }
 438
 439                         /*
 440                          * The IRQ encoder puts a single interrupt in each
 441                          * descriptor, so if a _CRS descriptor has more than
 442                          * one interrupt, we won't be able to re-encode it.
 443                          */
 444                         if (pnp_can_write(dev) &&
 445                             extended_irq->interrupt_count > 1) {
 446                                 dev_warn(&dev->dev, "multiple interrupts in "
 447                                          "_CRS descriptor; configuration can't "
 448                                          "be changed\n");
 449                                 dev->capabilities &= ~PNP_WRITE;
 450                         }
 451                 }
 452                 break;
 453
 454         case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 455                 break;
 456
 457         default:
 458                 dev_warn(&dev->dev, "unknown resource type %d in _CRS\n",
 459                          res->type);
 460                 return AE_ERROR;
 461         }
 462
 463         return AE_OK;
 464 }
 465
 466 int pnpacpi_parse_allocated_resource(struct pnp_dev *dev)
 467 {
 468         acpi_handle handle = dev->data;
 469         acpi_status status;
 470
 471         pnp_dbg(&dev->dev, "parse allocated resources\n");
 472
 473         pnp_init_resources(dev);
 474
 475         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 476                                      pnpacpi_allocated_resource, dev);
 477
 478         if (ACPI_FAILURE(status)) {
 479                 if (status != AE_NOT_FOUND)
 480                         dev_err(&dev->dev, "can't evaluate _CRS: %d", status);
 481                 return -EPERM;
 482         }
 483         return 0;
 484 }
 485
 486 static __init void pnpacpi_parse_dma_option(struct pnp_dev *dev,
 487                                             unsigned int option_flags,
 488                                             struct acpi_resource_dma *p)
 489 {
 490         int i;
 491         unsigned char map = 0, flags;
 492
 493         if (p->channel_count == 0)
 494                 return;
 495
 496         for (i = 0; i < p->channel_count; i++)
 497                 map |= 1 << p->channels[i];
 498
 499         flags = dma_flags(dev, p->type, p->bus_master, p->transfer);
 500         pnp_register_dma_resource(dev, option_flags, map, flags);
 501 }
 502
 503 static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev,
 504                                             unsigned int option_flags,
 505                                             struct acpi_resource_irq *p)
 506 {
 507         int i;
 508         pnp_irq_mask_t map;
 509         unsigned char flags;
 510
 511         if (p->interrupt_count == 0)
 512                 return;
 513
 514         bitmap_zero(map.bits, PNP_IRQ_NR);
 515         for (i = 0; i < p->interrupt_count; i++)
 516                 if (p->interrupts[i])
 517                         __set_bit(p->interrupts[i], map.bits);
 518
 519         flags = irq_flags(p->triggering, p->polarity, p->sharable);
 520         pnp_register_irq_resource(dev, option_flags, &map, flags);
 521 }
 522
 523 static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev,
 524                                         unsigned int option_flags,
 525                                         struct acpi_resource_extended_irq *p)
 526 {
 527         int i;
 528         pnp_irq_mask_t map;
 529         unsigned char flags;
 530
 531         if (p->interrupt_count == 0)
 532                 return;
 533
 534         bitmap_zero(map.bits, PNP_IRQ_NR);
 535         for (i = 0; i < p->interrupt_count; i++) {
 536                 if (p->interrupts[i]) {
 537                         if (p->interrupts[i] < PNP_IRQ_NR)
 538                                 __set_bit(p->interrupts[i], map.bits);
 539                         else
 540                                 dev_err(&dev->dev, "ignoring IRQ %d option "
 541                                         "(too large for %d entry bitmap)\n",
 542                                         p->interrupts[i], PNP_IRQ_NR);
 543                 }
 544         }
 545
 546         flags = irq_flags(p->triggering, p->polarity, p->sharable);
 547         pnp_register_irq_resource(dev, option_flags, &map, flags);
 548 }
 549
 550 static __init void pnpacpi_parse_port_option(struct pnp_dev *dev,
 551                                              unsigned int option_flags,
 552                                              struct acpi_resource_io *io)
 553 {
 554         unsigned char flags = 0;
 555
 556         if (io->address_length == 0)
 557                 return;
 558
 559         if (io->io_decode == ACPI_DECODE_16)
 560                 flags = IORESOURCE_IO_16BIT_ADDR;
 561         pnp_register_port_resource(dev, option_flags, io->minimum, io->maximum,
 562                                    io->alignment, io->address_length, flags);
 563 }
 564
 565 static __init void pnpacpi_parse_fixed_port_option(struct pnp_dev *dev,
 566                                         unsigned int option_flags,
 567                                         struct acpi_resource_fixed_io *io)
 568 {
 569         if (io->address_length == 0)
 570                 return;
 571
 572         pnp_register_port_resource(dev, option_flags, io->address, io->address,
 573                                    0, io->address_length, IORESOURCE_IO_FIXED);
 574 }
 575
 576 static __init void pnpacpi_parse_mem24_option(struct pnp_dev *dev,
 577                                               unsigned int option_flags,
 578                                               struct acpi_resource_memory24 *p)
 579 {
 580         unsigned char flags = 0;
 581
 582         if (p->address_length == 0)
 583                 return;
 584
 585         if (p->write_protect == ACPI_READ_WRITE_MEMORY)
 586                 flags = IORESOURCE_MEM_WRITEABLE;
 587         pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
 588                                   p->alignment, p->address_length, flags);
 589 }
 590
 591 static __init void pnpacpi_parse_mem32_option(struct pnp_dev *dev,
 592                                               unsigned int option_flags,
 593                                               struct acpi_resource_memory32 *p)
 594 {
 595         unsigned char flags = 0;
 596
 597         if (p->address_length == 0)
 598                 return;
 599
 600         if (p->write_protect == ACPI_READ_WRITE_MEMORY)
 601                 flags = IORESOURCE_MEM_WRITEABLE;
 602         pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
 603                                   p->alignment, p->address_length, flags);
 604 }
 605
 606 static __init void pnpacpi_parse_fixed_mem32_option(struct pnp_dev *dev,
 607                                         unsigned int option_flags,
 608                                         struct acpi_resource_fixed_memory32 *p)
 609 {
 610         unsigned char flags = 0;
 611
 612         if (p->address_length == 0)
 613                 return;
 614
 615         if (p->write_protect == ACPI_READ_WRITE_MEMORY)
 616                 flags = IORESOURCE_MEM_WRITEABLE;
 617         pnp_register_mem_resource(dev, option_flags, p->address, p->address,
 618                                   0, p->address_length, flags);
 619 }
 620
 621 static __init void pnpacpi_parse_address_option(struct pnp_dev *dev,
 622                                                 unsigned int option_flags,
 623                                                 struct acpi_resource *r)
 624 {
 625         struct acpi_resource_address64 addr, *p = &addr;
 626         acpi_status status;
 627         unsigned char flags = 0;
 628
 629         status = acpi_resource_to_address64(r, p);
 630         if (ACPI_FAILURE(status)) {
 631                 dev_warn(&dev->dev, "can't convert resource type %d\n",
 632                          r->type);
 633                 return;
 634         }
 635
 636         if (p->address_length == 0)
 637                 return;
 638
 639         if (p->resource_type == ACPI_MEMORY_RANGE) {
 640                 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
 641                         flags = IORESOURCE_MEM_WRITEABLE;
 642                 pnp_register_mem_resource(dev, option_flags, p->minimum,
 643                                           p->minimum, 0, p->address_length,
 644                                           flags);
 645         } else if (p->resource_type == ACPI_IO_RANGE)
 646                 pnp_register_port_resource(dev, option_flags, p->minimum,
 647                                            p->minimum, 0, p->address_length,
 648                                            IORESOURCE_IO_FIXED);
 649 }
 650
 651 static __init void pnpacpi_parse_ext_address_option(struct pnp_dev *dev,
 652                                                     unsigned int option_flags,
 653                                                     struct acpi_resource *r)
 654 {
 655         struct acpi_resource_extended_address64 *p = &r->data.ext_address64;
 656         unsigned char flags = 0;
 657
 658         if (p->address_length == 0)
 659                 return;
 660
 661         if (p->resource_type == ACPI_MEMORY_RANGE) {
 662                 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
 663                         flags = IORESOURCE_MEM_WRITEABLE;
 664                 pnp_register_mem_resource(dev, option_flags, p->minimum,
 665                                           p->minimum, 0, p->address_length,
 666                                           flags);
 667         } else if (p->resource_type == ACPI_IO_RANGE)
 668                 pnp_register_port_resource(dev, option_flags, p->minimum,
 669                                            p->minimum, 0, p->address_length,
 670                                            IORESOURCE_IO_FIXED);
 671 }
 672
 673 struct acpipnp_parse_option_s {
 674         struct pnp_dev *dev;
 675         unsigned int option_flags;
 676 };
 677
 678 static __init acpi_status pnpacpi_option_resource(struct acpi_resource *res,
 679                                                   void *data)
 680 {
 681         int priority;
 682         struct acpipnp_parse_option_s *parse_data = data;
 683         struct pnp_dev *dev = parse_data->dev;
 684         unsigned int option_flags = parse_data->option_flags;
 685
 686         switch (res->type) {
 687         case ACPI_RESOURCE_TYPE_IRQ:
 688                 pnpacpi_parse_irq_option(dev, option_flags, &res->data.irq);
 689                 break;
 690
 691         case ACPI_RESOURCE_TYPE_DMA:
 692                 pnpacpi_parse_dma_option(dev, option_flags, &res->data.dma);
 693                 break;
 694
 695         case ACPI_RESOURCE_TYPE_START_DEPENDENT:
 696                 switch (res->data.start_dpf.compatibility_priority) {
 697                 case ACPI_GOOD_CONFIGURATION:
 698                         priority = PNP_RES_PRIORITY_PREFERRED;
 699                         break;
 700
 701                 case ACPI_ACCEPTABLE_CONFIGURATION:
 702                         priority = PNP_RES_PRIORITY_ACCEPTABLE;
 703                         break;
 704
 705                 case ACPI_SUB_OPTIMAL_CONFIGURATION:
 706                         priority = PNP_RES_PRIORITY_FUNCTIONAL;
 707                         break;
 708                 default:
 709                         priority = PNP_RES_PRIORITY_INVALID;
 710                         break;
 711                 }
 712                 parse_data->option_flags = pnp_new_dependent_set(dev, priority);
 713                 break;
 714
 715         case ACPI_RESOURCE_TYPE_END_DEPENDENT:
 716                 parse_data->option_flags = 0;
 717                 break;
 718
 719         case ACPI_RESOURCE_TYPE_IO:
 720                 pnpacpi_parse_port_option(dev, option_flags, &res->data.io);
 721                 break;
 722
 723         case ACPI_RESOURCE_TYPE_FIXED_IO:
 724                 pnpacpi_parse_fixed_port_option(dev, option_flags,
 725                                                 &res->data.fixed_io);
 726                 break;
 727
 728         case ACPI_RESOURCE_TYPE_VENDOR:
 729         case ACPI_RESOURCE_TYPE_END_TAG:
 730                 break;
 731
 732         case ACPI_RESOURCE_TYPE_MEMORY24:
 733                 pnpacpi_parse_mem24_option(dev, option_flags,
 734                                            &res->data.memory24);
 735                 break;
 736
 737         case ACPI_RESOURCE_TYPE_MEMORY32:
 738                 pnpacpi_parse_mem32_option(dev, option_flags,
 739                                            &res->data.memory32);
 740                 break;
 741
 742         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 743                 pnpacpi_parse_fixed_mem32_option(dev, option_flags,
 744                                                  &res->data.fixed_memory32);
 745                 break;
 746
 747         case ACPI_RESOURCE_TYPE_ADDRESS16:
 748         case ACPI_RESOURCE_TYPE_ADDRESS32:
 749         case ACPI_RESOURCE_TYPE_ADDRESS64:
 750                 pnpacpi_parse_address_option(dev, option_flags, res);
 751                 break;
 752
 753         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 754                 pnpacpi_parse_ext_address_option(dev, option_flags, res);
 755                 break;
 756
 757         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 758                 pnpacpi_parse_ext_irq_option(dev, option_flags,
 759                                              &res->data.extended_irq);
 760                 break;
 761
 762         case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 763                 break;
 764
 765         default:
 766                 dev_warn(&dev->dev, "unknown resource type %d in _PRS\n",
 767                          res->type);
 768                 return AE_ERROR;
 769         }
 770
 771         return AE_OK;
 772 }
 773
 774 int __init pnpacpi_parse_resource_option_data(struct pnp_dev *dev)
 775 {
 776         acpi_handle handle = dev->data;
 777         acpi_status status;
 778         struct acpipnp_parse_option_s parse_data;
 779
 780         pnp_dbg(&dev->dev, "parse resource options\n");
 781
 782         parse_data.dev = dev;
 783         parse_data.option_flags = 0;
 784
 785         status = acpi_walk_resources(handle, METHOD_NAME__PRS,
 786                                      pnpacpi_option_resource, &parse_data);
 787
 788         if (ACPI_FAILURE(status)) {
 789                 if (status != AE_NOT_FOUND)
 790                         dev_err(&dev->dev, "can't evaluate _PRS: %d", status);
 791                 return -EPERM;
 792         }
 793         return 0;
 794 }
 795
 796 static int pnpacpi_supported_resource(struct acpi_resource *res)
 797 {
 798         switch (res->type) {
 799         case ACPI_RESOURCE_TYPE_IRQ:
 800         case ACPI_RESOURCE_TYPE_DMA:
 801         case ACPI_RESOURCE_TYPE_IO:
 802         case ACPI_RESOURCE_TYPE_FIXED_IO:
 803         case ACPI_RESOURCE_TYPE_MEMORY24:
 804         case ACPI_RESOURCE_TYPE_MEMORY32:
 805         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 806         case ACPI_RESOURCE_TYPE_ADDRESS16:
 807         case ACPI_RESOURCE_TYPE_ADDRESS32:
 808         case ACPI_RESOURCE_TYPE_ADDRESS64:
 809         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 810         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 811                 return 1;
 812         }
 813         return 0;
 814 }
 815
 816 /*
 817  * Set resource
 818  */
 819 static acpi_status pnpacpi_count_resources(struct acpi_resource *res,
 820                                            void *data)
 821 {
 822         int *res_cnt = data;
 823
 824         if (pnpacpi_supported_resource(res))
 825                 (*res_cnt)++;
 826         return AE_OK;
 827 }
 828
 829 static acpi_status pnpacpi_type_resources(struct acpi_resource *res, void *data)
 830 {
 831         struct acpi_resource **resource = data;
 832
 833         if (pnpacpi_supported_resource(res)) {
 834                 (*resource)->type = res->type;
 835                 (*resource)->length = sizeof(struct acpi_resource);
 836                 if (res->type == ACPI_RESOURCE_TYPE_IRQ)
 837                         (*resource)->data.irq.descriptor_length =
 838                                         res->data.irq.descriptor_length;
 839                 (*resource)++;
 840         }
 841
 842         return AE_OK;
 843 }
 844
 845 int pnpacpi_build_resource_template(struct pnp_dev *dev,
 846                                     struct acpi_buffer *buffer)
 847 {
 848         acpi_handle handle = dev->data;
 849         struct acpi_resource *resource;
 850         int res_cnt = 0;
 851         acpi_status status;
 852
 853         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 854                                      pnpacpi_count_resources, &res_cnt);
 855         if (ACPI_FAILURE(status)) {
 856                 dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
 857                 return -EINVAL;
 858         }
 859         if (!res_cnt)
 860                 return -EINVAL;
 861         buffer->length = sizeof(struct acpi_resource) * (res_cnt + 1) + 1;
 862         buffer->pointer = kzalloc(buffer->length - 1, GFP_KERNEL);
 863         if (!buffer->pointer)
 864                 return -ENOMEM;
 865
 866         resource = (struct acpi_resource *)buffer->pointer;
 867         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 868                                      pnpacpi_type_resources, &resource);
 869         if (ACPI_FAILURE(status)) {
 870                 kfree(buffer->pointer);
 871                 dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
 872                 return -EINVAL;
 873         }
 874         /* resource will pointer the end resource now */
 875         resource->type = ACPI_RESOURCE_TYPE_END_TAG;
 876
 877         return 0;
 878 }
 879
 880 static void pnpacpi_encode_irq(struct pnp_dev *dev,
 881                                struct acpi_resource *resource,
 882                                struct resource *p)
 883 {
 884         struct acpi_resource_irq *irq = &resource->data.irq;
 885         int triggering, polarity, shareable;
 886
 887         if (!pnp_resource_enabled(p)) {
 888                 irq->interrupt_count = 0;
 889                 pnp_dbg(&dev->dev, "  encode irq (%s)\n",
 890                         p ? "disabled" : "missing");
 891                 return;
 892         }
 893
 894         decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
 895         irq->triggering = triggering;
 896         irq->polarity = polarity;
 897         irq->sharable = shareable;
 898         irq->interrupt_count = 1;
 899         irq->interrupts[0] = p->start;
 900
 901         pnp_dbg(&dev->dev, "  encode irq %d %s %s %s (%d-byte descriptor)\n",
 902                 (int) p->start,
 903                 triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
 904                 polarity == ACPI_ACTIVE_LOW ? "low" : "high",
 905                 irq->sharable == ACPI_SHARED ? "shared" : "exclusive",
 906                 irq->descriptor_length);
 907 }
 908
 909 static void pnpacpi_encode_ext_irq(struct pnp_dev *dev,
 910                                    struct acpi_resource *resource,
 911                                    struct resource *p)
 912 {
 913         struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq;
 914         int triggering, polarity, shareable;
 915
 916         if (!pnp_resource_enabled(p)) {
 917                 extended_irq->interrupt_count = 0;
 918                 pnp_dbg(&dev->dev, "  encode extended irq (%s)\n",
 919                         p ? "disabled" : "missing");
 920                 return;
 921         }
 922
 923         decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
 924         extended_irq->producer_consumer = ACPI_CONSUMER;
 925         extended_irq->triggering = triggering;
 926         extended_irq->polarity = polarity;
 927         extended_irq->sharable = shareable;
 928         extended_irq->interrupt_count = 1;
 929         extended_irq->interrupts[0] = p->start;
 930
 931         pnp_dbg(&dev->dev, "  encode irq %d %s %s %s\n", (int) p->start,
 932                 triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
 933                 polarity == ACPI_ACTIVE_LOW ? "low" : "high",
 934                 extended_irq->sharable == ACPI_SHARED ? "shared" : "exclusive");
 935 }
 936
 937 static void pnpacpi_encode_dma(struct pnp_dev *dev,
 938                                struct acpi_resource *resource,
 939                                struct resource *p)
 940 {
 941         struct acpi_resource_dma *dma = &resource->data.dma;
 942
 943         if (!pnp_resource_enabled(p)) {
 944                 dma->channel_count = 0;
 945                 pnp_dbg(&dev->dev, "  encode dma (%s)\n",
 946                         p ? "disabled" : "missing");
 947                 return;
 948         }
 949
 950         /* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */
 951         switch (p->flags & IORESOURCE_DMA_SPEED_MASK) {
 952         case IORESOURCE_DMA_TYPEA:
 953                 dma->type = ACPI_TYPE_A;
 954                 break;
 955         case IORESOURCE_DMA_TYPEB:
 956                 dma->type = ACPI_TYPE_B;
 957                 break;
 958         case IORESOURCE_DMA_TYPEF:
 959                 dma->type = ACPI_TYPE_F;
 960                 break;
 961         default:
 962                 dma->type = ACPI_COMPATIBILITY;
 963         }
 964
 965         switch (p->flags & IORESOURCE_DMA_TYPE_MASK) {
 966         case IORESOURCE_DMA_8BIT:
 967                 dma->transfer = ACPI_TRANSFER_8;
 968                 break;
 969         case IORESOURCE_DMA_8AND16BIT:
 970                 dma->transfer = ACPI_TRANSFER_8_16;
 971                 break;
 972         default:
 973                 dma->transfer = ACPI_TRANSFER_16;
 974         }
 975
 976         dma->bus_master = !!(p->flags & IORESOURCE_DMA_MASTER);
 977         dma->channel_count = 1;
 978         dma->channels[0] = p->start;
 979
 980         pnp_dbg(&dev->dev, "  encode dma %d "
 981                 "type %#x transfer %#x master %d\n",
 982                 (int) p->start, dma->type, dma->transfer, dma->bus_master);
 983 }
 984
 985 static void pnpacpi_encode_io(struct pnp_dev *dev,
 986                               struct acpi_resource *resource,
 987                               struct resource *p)
 988 {
 989         struct acpi_resource_io *io = &resource->data.io;
 990
 991         if (pnp_resource_enabled(p)) {
 992                 /* Note: pnp_assign_port copies pnp_port->flags into p->flags */
 993                 io->io_decode = (p->flags & IORESOURCE_IO_16BIT_ADDR) ?
 994                     ACPI_DECODE_16 : ACPI_DECODE_10;
 995                 io->minimum = p->start;
 996                 io->maximum = p->end;
 997                 io->alignment = 0;      /* Correct? */
 998                 io->address_length = p->end - p->start + 1;
 999         } else {
1000                 io->minimum = 0;
1001                 io->address_length = 0;
1002         }
1003
1004         pnp_dbg(&dev->dev, "  encode io %#x-%#x decode %#x\n", io->minimum,
1005                 io->minimum + io->address_length - 1, io->io_decode);
1006 }
1007
1008 static void pnpacpi_encode_fixed_io(struct pnp_dev *dev,
1009                                     struct acpi_resource *resource,
1010                                     struct resource *p)
1011 {
1012         struct acpi_resource_fixed_io *fixed_io = &resource->data.fixed_io;
1013
1014         if (pnp_resource_enabled(p)) {
1015                 fixed_io->address = p->start;
1016                 fixed_io->address_length = p->end - p->start + 1;
1017         } else {
1018                 fixed_io->address = 0;
1019                 fixed_io->address_length = 0;
1020         }
1021
1022         pnp_dbg(&dev->dev, "  encode fixed_io %#x-%#x\n", fixed_io->address,
1023                 fixed_io->address + fixed_io->address_length - 1);
1024 }
1025
1026 static void pnpacpi_encode_mem24(struct pnp_dev *dev,
1027                                  struct acpi_resource *resource,
1028                                  struct resource *p)
1029 {
1030         struct acpi_resource_memory24 *memory24 = &resource->data.memory24;
1031
1032         if (pnp_resource_enabled(p)) {
1033                 /* Note: pnp_assign_mem copies pnp_mem->flags into p->flags */
1034                 memory24->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
1035                     ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1036                 memory24->minimum = p->start;
1037                 memory24->maximum = p->end;
1038                 memory24->alignment = 0;
1039                 memory24->address_length = p->end - p->start + 1;
1040         } else {
1041                 memory24->minimum = 0;
1042                 memory24->address_length = 0;
1043         }
1044
1045         pnp_dbg(&dev->dev, "  encode mem24 %#x-%#x write_protect %#x\n",
1046                 memory24->minimum,
1047                 memory24->minimum + memory24->address_length - 1,
1048                 memory24->write_protect);
1049 }
1050
1051 static void pnpacpi_encode_mem32(struct pnp_dev *dev,
1052                                  struct acpi_resource *resource,
1053                                  struct resource *p)
1054 {
1055         struct acpi_resource_memory32 *memory32 = &resource->data.memory32;
1056
1057         if (pnp_resource_enabled(p)) {
1058                 memory32->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
1059                     ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1060                 memory32->minimum = p->start;
1061                 memory32->maximum = p->end;
1062                 memory32->alignment = 0;
1063                 memory32->address_length = p->end - p->start + 1;
1064         } else {
1065                 memory32->minimum = 0;
1066                 memory32->alignment = 0;
1067         }
1068
1069         pnp_dbg(&dev->dev, "  encode mem32 %#x-%#x write_protect %#x\n",
1070                 memory32->minimum,
1071                 memory32->minimum + memory32->address_length - 1,
1072                 memory32->write_protect);
1073 }
1074
1075 static void pnpacpi_encode_fixed_mem32(struct pnp_dev *dev,
1076                                        struct acpi_resource *resource,
1077                                        struct resource *p)
1078 {
1079         struct acpi_resource_fixed_memory32 *fixed_memory32 = &resource->data.fixed_memory32;
1080
1081         if (pnp_resource_enabled(p)) {
1082                 fixed_memory32->write_protect =
1083                     p->flags & IORESOURCE_MEM_WRITEABLE ?
1084                     ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1085                 fixed_memory32->address = p->start;
1086                 fixed_memory32->address_length = p->end - p->start + 1;
1087         } else {
1088                 fixed_memory32->address = 0;
1089                 fixed_memory32->address_length = 0;
1090         }
1091
1092         pnp_dbg(&dev->dev, "  encode fixed_mem32 %#x-%#x write_protect %#x\n",
1093                 fixed_memory32->address,
1094                 fixed_memory32->address + fixed_memory32->address_length - 1,
1095                 fixed_memory32->write_protect);
1096 }
1097
1098 int pnpacpi_encode_resources(struct pnp_dev *dev, struct acpi_buffer *buffer)
1099 {
1100         int i = 0;
1101         /* pnpacpi_build_resource_template allocates extra mem */
1102         int res_cnt = (buffer->length - 1) / sizeof(struct acpi_resource) - 1;
1103         struct acpi_resource *resource = buffer->pointer;
1104         int port = 0, irq = 0, dma = 0, mem = 0;
1105
1106         pnp_dbg(&dev->dev, "encode %d resources\n", res_cnt);
1107         while (i < res_cnt) {
1108                 switch (resource->type) {
1109                 case ACPI_RESOURCE_TYPE_IRQ:
1110                         pnpacpi_encode_irq(dev, resource,
1111                                pnp_get_resource(dev, IORESOURCE_IRQ, irq));
1112                         irq++;
1113                         break;
1114
1115                 case ACPI_RESOURCE_TYPE_DMA:
1116                         pnpacpi_encode_dma(dev, resource,
1117                                 pnp_get_resource(dev, IORESOURCE_DMA, dma));
1118                         dma++;
1119                         break;
1120                 case ACPI_RESOURCE_TYPE_IO:
1121                         pnpacpi_encode_io(dev, resource,
1122                                 pnp_get_resource(dev, IORESOURCE_IO, port));
1123                         port++;
1124                         break;
1125                 case ACPI_RESOURCE_TYPE_FIXED_IO:
1126                         pnpacpi_encode_fixed_io(dev, resource,
1127                                 pnp_get_resource(dev, IORESOURCE_IO, port));
1128                         port++;
1129                         break;
1130                 case ACPI_RESOURCE_TYPE_MEMORY24:
1131                         pnpacpi_encode_mem24(dev, resource,
1132                                 pnp_get_resource(dev, IORESOURCE_MEM, mem));
1133                         mem++;
1134                         break;
1135                 case ACPI_RESOURCE_TYPE_MEMORY32:
1136                         pnpacpi_encode_mem32(dev, resource,
1137                                 pnp_get_resource(dev, IORESOURCE_MEM, mem));
1138                         mem++;
1139                         break;
1140                 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
1141                         pnpacpi_encode_fixed_mem32(dev, resource,
1142                                 pnp_get_resource(dev, IORESOURCE_MEM, mem));
1143                         mem++;
1144                         break;
1145                 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
1146                         pnpacpi_encode_ext_irq(dev, resource,
1147                                 pnp_get_resource(dev, IORESOURCE_IRQ, irq));
1148                         irq++;
1149                         break;
1150                 case ACPI_RESOURCE_TYPE_START_DEPENDENT:
1151                 case ACPI_RESOURCE_TYPE_END_DEPENDENT:
1152                 case ACPI_RESOURCE_TYPE_VENDOR:
1153                 case ACPI_RESOURCE_TYPE_END_TAG:
1154                 case ACPI_RESOURCE_TYPE_ADDRESS16:
1155                 case ACPI_RESOURCE_TYPE_ADDRESS32:
1156                 case ACPI_RESOURCE_TYPE_ADDRESS64:
1157                 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
1158                 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
1159                 default:        /* other type */
1160                         dev_warn(&dev->dev, "can't encode unknown resource "
1161                                  "type %d\n", resource->type);
1162                         return -EINVAL;
1163                 }
1164                 resource++;
1165                 i++;
1166         }
1167         return 0;
1168 }