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 <linux/slab.h>
  28 #include "../base.h"
  29 #include "pnpacpi.h"
  30
  31 static void decode_irq_flags(struct pnp_dev *dev, int flags, int *triggering,
  32                              int *polarity, int *shareable)
  33 {
  34         switch (flags & (IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL |
  35                          IORESOURCE_IRQ_LOWEDGE  | IORESOURCE_IRQ_HIGHEDGE)) {
  36         case IORESOURCE_IRQ_LOWLEVEL:
  37                 *triggering = ACPI_LEVEL_SENSITIVE;
  38                 *polarity = ACPI_ACTIVE_LOW;
  39                 break;
  40         case IORESOURCE_IRQ_HIGHLEVEL:
  41                 *triggering = ACPI_LEVEL_SENSITIVE;
  42                 *polarity = ACPI_ACTIVE_HIGH;
  43                 break;
  44         case IORESOURCE_IRQ_LOWEDGE:
  45                 *triggering = ACPI_EDGE_SENSITIVE;
  46                 *polarity = ACPI_ACTIVE_LOW;
  47                 break;
  48         case IORESOURCE_IRQ_HIGHEDGE:
  49                 *triggering = ACPI_EDGE_SENSITIVE;
  50                 *polarity = ACPI_ACTIVE_HIGH;
  51                 break;
  52         default:
  53                 dev_err(&dev->dev, "can't encode invalid IRQ mode %#x\n",
  54                         flags);
  55                 *triggering = ACPI_EDGE_SENSITIVE;
  56                 *polarity = ACPI_ACTIVE_HIGH;
  57                 break;
  58         }
  59
  60         if (flags & IORESOURCE_IRQ_SHAREABLE)
  61                 *shareable = ACPI_SHARED;
  62         else
  63                 *shareable = ACPI_EXCLUSIVE;
  64 }
  65
  66 static int dma_flags(struct pnp_dev *dev, int type, int bus_master,
  67                      int transfer)
  68 {
  69         int flags = 0;
  70
  71         if (bus_master)
  72                 flags |= IORESOURCE_DMA_MASTER;
  73         switch (type) {
  74         case ACPI_COMPATIBILITY:
  75                 flags |= IORESOURCE_DMA_COMPATIBLE;
  76                 break;
  77         case ACPI_TYPE_A:
  78                 flags |= IORESOURCE_DMA_TYPEA;
  79                 break;
  80         case ACPI_TYPE_B:
  81                 flags |= IORESOURCE_DMA_TYPEB;
  82                 break;
  83         case ACPI_TYPE_F:
  84                 flags |= IORESOURCE_DMA_TYPEF;
  85                 break;
  86         default:
  87                 /* Set a default value ? */
  88                 flags |= IORESOURCE_DMA_COMPATIBLE;
  89                 dev_err(&dev->dev, "invalid DMA type %d\n", type);
  90         }
  91         switch (transfer) {
  92         case ACPI_TRANSFER_8:
  93                 flags |= IORESOURCE_DMA_8BIT;
  94                 break;
  95         case ACPI_TRANSFER_8_16:
  96                 flags |= IORESOURCE_DMA_8AND16BIT;
  97                 break;
  98         case ACPI_TRANSFER_16:
  99                 flags |= IORESOURCE_DMA_16BIT;
 100                 break;
 101         default:
 102                 /* Set a default value ? */
 103                 flags |= IORESOURCE_DMA_8AND16BIT;
 104                 dev_err(&dev->dev, "invalid DMA transfer type %d\n", transfer);
 105         }
 106
 107         return flags;
 108 }
 109
 110 /*
 111  * Allocated Resources
 112  */
 113
 114 static void pnpacpi_add_irqresource(struct pnp_dev *dev, struct resource *r)
 115 {
 116         if (!(r->flags & IORESOURCE_DISABLED))
 117                 pcibios_penalize_isa_irq(r->start, 1);
 118
 119         pnp_add_resource(dev, r);
 120 }
 121
 122 /*
 123  * Device CSRs that do not appear in PCI config space should be described
 124  * via ACPI.  This would normally be done with Address Space Descriptors
 125  * marked as "consumer-only," but old versions of Windows and Linux ignore
 126  * the producer/consumer flag, so HP invented a vendor-defined resource to
 127  * describe the location and size of CSR space.
 128  */
 129 static struct acpi_vendor_uuid hp_ccsr_uuid = {
 130         .subtype = 2,
 131         .data = { 0xf9, 0xad, 0xe9, 0x69, 0x4f, 0x92, 0x5f, 0xab, 0xf6, 0x4a,
 132             0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad },
 133 };
 134
 135 static int vendor_resource_matches(struct pnp_dev *dev,
 136                                    struct acpi_resource_vendor_typed *vendor,
 137                                    struct acpi_vendor_uuid *match,
 138                                    int expected_len)
 139 {
 140         int uuid_len = sizeof(vendor->uuid);
 141         u8 uuid_subtype = vendor->uuid_subtype;
 142         u8 *uuid = vendor->uuid;
 143         int actual_len;
 144
 145         /* byte_length includes uuid_subtype and uuid */
 146         actual_len = vendor->byte_length - uuid_len - 1;
 147
 148         if (uuid_subtype == match->subtype &&
 149             uuid_len == sizeof(match->data) &&
 150             memcmp(uuid, match->data, uuid_len) == 0) {
 151                 if (expected_len && expected_len != actual_len) {
 152                         dev_err(&dev->dev, "wrong vendor descriptor size; "
 153                                 "expected %d, found %d bytes\n",
 154                                 expected_len, actual_len);
 155                         return 0;
 156                 }
 157
 158                 return 1;
 159         }
 160
 161         return 0;
 162 }
 163
 164 static void pnpacpi_parse_allocated_vendor(struct pnp_dev *dev,
 165                                     struct acpi_resource_vendor_typed *vendor)
 166 {
 167         if (vendor_resource_matches(dev, vendor, &hp_ccsr_uuid, 16)) {
 168                 u64 start, length;
 169
 170                 memcpy(&start, vendor->byte_data, sizeof(start));
 171                 memcpy(&length, vendor->byte_data + 8, sizeof(length));
 172
 173                 pnp_add_mem_resource(dev, start, start + length - 1, 0);
 174         }
 175 }
 176
 177 static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
 178                                               void *data)
 179 {
 180         struct pnp_dev *dev = data;
 181         struct acpi_resource_dma *dma;
 182         struct acpi_resource_vendor_typed *vendor_typed;
 183         struct resource r = {0};
 184         int i, flags;
 185
 186         if (acpi_dev_resource_address_space(res, &r)
 187             || acpi_dev_resource_ext_address_space(res, &r)) {
 188                 pnp_add_resource(dev, &r);
 189                 return AE_OK;
 190         }
 191
 192         r.flags = 0;
 193         if (acpi_dev_resource_interrupt(res, 0, &r)) {
 194                 pnpacpi_add_irqresource(dev, &r);
 195                 for (i = 1; acpi_dev_resource_interrupt(res, i, &r); i++)
 196                         pnpacpi_add_irqresource(dev, &r);
 197
 198                 if (i > 1) {
 199                         /*
 200                          * The IRQ encoder puts a single interrupt in each
 201                          * descriptor, so if a _CRS descriptor has more than
 202                          * one interrupt, we won't be able to re-encode it.
 203                          */
 204                         if (pnp_can_write(dev)) {
 205                                 dev_warn(&dev->dev, "multiple interrupts in "
 206                                          "_CRS descriptor; configuration can't "
 207                                          "be changed\n");
 208                                 dev->capabilities &= ~PNP_WRITE;
 209                         }
 210                 }
 211                 return AE_OK;
 212         } else if (r.flags & IORESOURCE_DISABLED) {
 213                 pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
 214                 return AE_OK;
 215         }
 216
 217         switch (res->type) {
 218         case ACPI_RESOURCE_TYPE_MEMORY24:
 219         case ACPI_RESOURCE_TYPE_MEMORY32:
 220         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 221                 if (acpi_dev_resource_memory(res, &r))
 222                         pnp_add_resource(dev, &r);
 223                 break;
 224         case ACPI_RESOURCE_TYPE_IO:
 225         case ACPI_RESOURCE_TYPE_FIXED_IO:
 226                 if (acpi_dev_resource_io(res, &r))
 227                         pnp_add_resource(dev, &r);
 228                 break;
 229         case ACPI_RESOURCE_TYPE_DMA:
 230                 dma = &res->data.dma;
 231                 if (dma->channel_count > 0 && dma->channels[0] != (u8) -1)
 232                         flags = dma_flags(dev, dma->type, dma->bus_master,
 233                                           dma->transfer);
 234                 else
 235                         flags = IORESOURCE_DISABLED;
 236                 pnp_add_dma_resource(dev, dma->channels[0], flags);
 237                 break;
 238
 239         case ACPI_RESOURCE_TYPE_START_DEPENDENT:
 240         case ACPI_RESOURCE_TYPE_END_DEPENDENT:
 241                 break;
 242
 243         case ACPI_RESOURCE_TYPE_VENDOR:
 244                 vendor_typed = &res->data.vendor_typed;
 245                 pnpacpi_parse_allocated_vendor(dev, vendor_typed);
 246                 break;
 247
 248         case ACPI_RESOURCE_TYPE_END_TAG:
 249                 break;
 250
 251         case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 252                 break;
 253
 254         default:
 255                 dev_warn(&dev->dev, "unknown resource type %d in _CRS\n",
 256                          res->type);
 257                 return AE_ERROR;
 258         }
 259
 260         return AE_OK;
 261 }
 262
 263 int pnpacpi_parse_allocated_resource(struct pnp_dev *dev)
 264 {
 265         struct acpi_device *acpi_dev = dev->data;
 266         acpi_handle handle = acpi_dev->handle;
 267         acpi_status status;
 268
 269         pnp_dbg(&dev->dev, "parse allocated resources\n");
 270
 271         pnp_init_resources(dev);
 272
 273         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 274                                      pnpacpi_allocated_resource, dev);
 275
 276         if (ACPI_FAILURE(status)) {
 277                 if (status != AE_NOT_FOUND)
 278                         dev_err(&dev->dev, "can't evaluate _CRS: %d", status);
 279                 return -EPERM;
 280         }
 281         return 0;
 282 }
 283
 284 static __init void pnpacpi_parse_dma_option(struct pnp_dev *dev,
 285                                             unsigned int option_flags,
 286                                             struct acpi_resource_dma *p)
 287 {
 288         int i;
 289         unsigned char map = 0, flags;
 290
 291         for (i = 0; i < p->channel_count; i++)
 292                 map |= 1 << p->channels[i];
 293
 294         flags = dma_flags(dev, p->type, p->bus_master, p->transfer);
 295         pnp_register_dma_resource(dev, option_flags, map, flags);
 296 }
 297
 298 static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev,
 299                                             unsigned int option_flags,
 300                                             struct acpi_resource_irq *p)
 301 {
 302         int i;
 303         pnp_irq_mask_t map;
 304         unsigned char flags;
 305
 306         bitmap_zero(map.bits, PNP_IRQ_NR);
 307         for (i = 0; i < p->interrupt_count; i++)
 308                 if (p->interrupts[i])
 309                         __set_bit(p->interrupts[i], map.bits);
 310
 311         flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->sharable);
 312         pnp_register_irq_resource(dev, option_flags, &map, flags);
 313 }
 314
 315 static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev,
 316                                         unsigned int option_flags,
 317                                         struct acpi_resource_extended_irq *p)
 318 {
 319         int i;
 320         pnp_irq_mask_t map;
 321         unsigned char flags;
 322
 323         bitmap_zero(map.bits, PNP_IRQ_NR);
 324         for (i = 0; i < p->interrupt_count; i++) {
 325                 if (p->interrupts[i]) {
 326                         if (p->interrupts[i] < PNP_IRQ_NR)
 327                                 __set_bit(p->interrupts[i], map.bits);
 328                         else
 329                                 dev_err(&dev->dev, "ignoring IRQ %d option "
 330                                         "(too large for %d entry bitmap)\n",
 331                                         p->interrupts[i], PNP_IRQ_NR);
 332                 }
 333         }
 334
 335         flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->sharable);
 336         pnp_register_irq_resource(dev, option_flags, &map, flags);
 337 }
 338
 339 static __init void pnpacpi_parse_port_option(struct pnp_dev *dev,
 340                                              unsigned int option_flags,
 341                                              struct acpi_resource_io *io)
 342 {
 343         unsigned char flags = 0;
 344
 345         if (io->io_decode == ACPI_DECODE_16)
 346                 flags = IORESOURCE_IO_16BIT_ADDR;
 347         pnp_register_port_resource(dev, option_flags, io->minimum, io->maximum,
 348                                    io->alignment, io->address_length, flags);
 349 }
 350
 351 static __init void pnpacpi_parse_fixed_port_option(struct pnp_dev *dev,
 352                                         unsigned int option_flags,
 353                                         struct acpi_resource_fixed_io *io)
 354 {
 355         pnp_register_port_resource(dev, option_flags, io->address, io->address,
 356                                    0, io->address_length, IORESOURCE_IO_FIXED);
 357 }
 358
 359 static __init void pnpacpi_parse_mem24_option(struct pnp_dev *dev,
 360                                               unsigned int option_flags,
 361                                               struct acpi_resource_memory24 *p)
 362 {
 363         unsigned char flags = 0;
 364
 365         if (p->write_protect == ACPI_READ_WRITE_MEMORY)
 366                 flags = IORESOURCE_MEM_WRITEABLE;
 367         pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
 368                                   p->alignment, p->address_length, flags);
 369 }
 370
 371 static __init void pnpacpi_parse_mem32_option(struct pnp_dev *dev,
 372                                               unsigned int option_flags,
 373                                               struct acpi_resource_memory32 *p)
 374 {
 375         unsigned char flags = 0;
 376
 377         if (p->write_protect == ACPI_READ_WRITE_MEMORY)
 378                 flags = IORESOURCE_MEM_WRITEABLE;
 379         pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
 380                                   p->alignment, p->address_length, flags);
 381 }
 382
 383 static __init void pnpacpi_parse_fixed_mem32_option(struct pnp_dev *dev,
 384                                         unsigned int option_flags,
 385                                         struct acpi_resource_fixed_memory32 *p)
 386 {
 387         unsigned char flags = 0;
 388
 389         if (p->write_protect == ACPI_READ_WRITE_MEMORY)
 390                 flags = IORESOURCE_MEM_WRITEABLE;
 391         pnp_register_mem_resource(dev, option_flags, p->address, p->address,
 392                                   0, p->address_length, flags);
 393 }
 394
 395 static __init void pnpacpi_parse_address_option(struct pnp_dev *dev,
 396                                                 unsigned int option_flags,
 397                                                 struct acpi_resource *r)
 398 {
 399         struct acpi_resource_address64 addr, *p = &addr;
 400         acpi_status status;
 401         unsigned char flags = 0;
 402
 403         status = acpi_resource_to_address64(r, p);
 404         if (ACPI_FAILURE(status)) {
 405                 dev_warn(&dev->dev, "can't convert resource type %d\n",
 406                          r->type);
 407                 return;
 408         }
 409
 410         if (p->resource_type == ACPI_MEMORY_RANGE) {
 411                 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
 412                         flags = IORESOURCE_MEM_WRITEABLE;
 413                 pnp_register_mem_resource(dev, option_flags, p->minimum,
 414                                           p->minimum, 0, p->address_length,
 415                                           flags);
 416         } else if (p->resource_type == ACPI_IO_RANGE)
 417                 pnp_register_port_resource(dev, option_flags, p->minimum,
 418                                            p->minimum, 0, p->address_length,
 419                                            IORESOURCE_IO_FIXED);
 420 }
 421
 422 static __init void pnpacpi_parse_ext_address_option(struct pnp_dev *dev,
 423                                                     unsigned int option_flags,
 424                                                     struct acpi_resource *r)
 425 {
 426         struct acpi_resource_extended_address64 *p = &r->data.ext_address64;
 427         unsigned char flags = 0;
 428
 429         if (p->resource_type == ACPI_MEMORY_RANGE) {
 430                 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
 431                         flags = IORESOURCE_MEM_WRITEABLE;
 432                 pnp_register_mem_resource(dev, option_flags, p->minimum,
 433                                           p->minimum, 0, p->address_length,
 434                                           flags);
 435         } else if (p->resource_type == ACPI_IO_RANGE)
 436                 pnp_register_port_resource(dev, option_flags, p->minimum,
 437                                            p->minimum, 0, p->address_length,
 438                                            IORESOURCE_IO_FIXED);
 439 }
 440
 441 struct acpipnp_parse_option_s {
 442         struct pnp_dev *dev;
 443         unsigned int option_flags;
 444 };
 445
 446 static __init acpi_status pnpacpi_option_resource(struct acpi_resource *res,
 447                                                   void *data)
 448 {
 449         int priority;
 450         struct acpipnp_parse_option_s *parse_data = data;
 451         struct pnp_dev *dev = parse_data->dev;
 452         unsigned int option_flags = parse_data->option_flags;
 453
 454         switch (res->type) {
 455         case ACPI_RESOURCE_TYPE_IRQ:
 456                 pnpacpi_parse_irq_option(dev, option_flags, &res->data.irq);
 457                 break;
 458
 459         case ACPI_RESOURCE_TYPE_DMA:
 460                 pnpacpi_parse_dma_option(dev, option_flags, &res->data.dma);
 461                 break;
 462
 463         case ACPI_RESOURCE_TYPE_START_DEPENDENT:
 464                 switch (res->data.start_dpf.compatibility_priority) {
 465                 case ACPI_GOOD_CONFIGURATION:
 466                         priority = PNP_RES_PRIORITY_PREFERRED;
 467                         break;
 468
 469                 case ACPI_ACCEPTABLE_CONFIGURATION:
 470                         priority = PNP_RES_PRIORITY_ACCEPTABLE;
 471                         break;
 472
 473                 case ACPI_SUB_OPTIMAL_CONFIGURATION:
 474                         priority = PNP_RES_PRIORITY_FUNCTIONAL;
 475                         break;
 476                 default:
 477                         priority = PNP_RES_PRIORITY_INVALID;
 478                         break;
 479                 }
 480                 parse_data->option_flags = pnp_new_dependent_set(dev, priority);
 481                 break;
 482
 483         case ACPI_RESOURCE_TYPE_END_DEPENDENT:
 484                 parse_data->option_flags = 0;
 485                 break;
 486
 487         case ACPI_RESOURCE_TYPE_IO:
 488                 pnpacpi_parse_port_option(dev, option_flags, &res->data.io);
 489                 break;
 490
 491         case ACPI_RESOURCE_TYPE_FIXED_IO:
 492                 pnpacpi_parse_fixed_port_option(dev, option_flags,
 493                                                 &res->data.fixed_io);
 494                 break;
 495
 496         case ACPI_RESOURCE_TYPE_VENDOR:
 497         case ACPI_RESOURCE_TYPE_END_TAG:
 498                 break;
 499
 500         case ACPI_RESOURCE_TYPE_MEMORY24:
 501                 pnpacpi_parse_mem24_option(dev, option_flags,
 502                                            &res->data.memory24);
 503                 break;
 504
 505         case ACPI_RESOURCE_TYPE_MEMORY32:
 506                 pnpacpi_parse_mem32_option(dev, option_flags,
 507                                            &res->data.memory32);
 508                 break;
 509
 510         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 511                 pnpacpi_parse_fixed_mem32_option(dev, option_flags,
 512                                                  &res->data.fixed_memory32);
 513                 break;
 514
 515         case ACPI_RESOURCE_TYPE_ADDRESS16:
 516         case ACPI_RESOURCE_TYPE_ADDRESS32:
 517         case ACPI_RESOURCE_TYPE_ADDRESS64:
 518                 pnpacpi_parse_address_option(dev, option_flags, res);
 519                 break;
 520
 521         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 522                 pnpacpi_parse_ext_address_option(dev, option_flags, res);
 523                 break;
 524
 525         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 526                 pnpacpi_parse_ext_irq_option(dev, option_flags,
 527                                              &res->data.extended_irq);
 528                 break;
 529
 530         case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 531                 break;
 532
 533         default:
 534                 dev_warn(&dev->dev, "unknown resource type %d in _PRS\n",
 535                          res->type);
 536                 return AE_ERROR;
 537         }
 538
 539         return AE_OK;
 540 }
 541
 542 int __init pnpacpi_parse_resource_option_data(struct pnp_dev *dev)
 543 {
 544         struct acpi_device *acpi_dev = dev->data;
 545         acpi_handle handle = acpi_dev->handle;
 546         acpi_status status;
 547         struct acpipnp_parse_option_s parse_data;
 548
 549         pnp_dbg(&dev->dev, "parse resource options\n");
 550
 551         parse_data.dev = dev;
 552         parse_data.option_flags = 0;
 553
 554         status = acpi_walk_resources(handle, METHOD_NAME__PRS,
 555                                      pnpacpi_option_resource, &parse_data);
 556
 557         if (ACPI_FAILURE(status)) {
 558                 if (status != AE_NOT_FOUND)
 559                         dev_err(&dev->dev, "can't evaluate _PRS: %d", status);
 560                 return -EPERM;
 561         }
 562         return 0;
 563 }
 564
 565 static int pnpacpi_supported_resource(struct acpi_resource *res)
 566 {
 567         switch (res->type) {
 568         case ACPI_RESOURCE_TYPE_IRQ:
 569         case ACPI_RESOURCE_TYPE_DMA:
 570         case ACPI_RESOURCE_TYPE_IO:
 571         case ACPI_RESOURCE_TYPE_FIXED_IO:
 572         case ACPI_RESOURCE_TYPE_MEMORY24:
 573         case ACPI_RESOURCE_TYPE_MEMORY32:
 574         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 575         case ACPI_RESOURCE_TYPE_ADDRESS16:
 576         case ACPI_RESOURCE_TYPE_ADDRESS32:
 577         case ACPI_RESOURCE_TYPE_ADDRESS64:
 578         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 579         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 580                 return 1;
 581         }
 582         return 0;
 583 }
 584
 585 /*
 586  * Set resource
 587  */
 588 static acpi_status pnpacpi_count_resources(struct acpi_resource *res,
 589                                            void *data)
 590 {
 591         int *res_cnt = data;
 592
 593         if (pnpacpi_supported_resource(res))
 594                 (*res_cnt)++;
 595         return AE_OK;
 596 }
 597
 598 static acpi_status pnpacpi_type_resources(struct acpi_resource *res, void *data)
 599 {
 600         struct acpi_resource **resource = data;
 601
 602         if (pnpacpi_supported_resource(res)) {
 603                 (*resource)->type = res->type;
 604                 (*resource)->length = sizeof(struct acpi_resource);
 605                 if (res->type == ACPI_RESOURCE_TYPE_IRQ)
 606                         (*resource)->data.irq.descriptor_length =
 607                                         res->data.irq.descriptor_length;
 608                 (*resource)++;
 609         }
 610
 611         return AE_OK;
 612 }
 613
 614 int pnpacpi_build_resource_template(struct pnp_dev *dev,
 615                                     struct acpi_buffer *buffer)
 616 {
 617         struct acpi_device *acpi_dev = dev->data;
 618         acpi_handle handle = acpi_dev->handle;
 619         struct acpi_resource *resource;
 620         int res_cnt = 0;
 621         acpi_status status;
 622
 623         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 624                                      pnpacpi_count_resources, &res_cnt);
 625         if (ACPI_FAILURE(status)) {
 626                 dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
 627                 return -EINVAL;
 628         }
 629         if (!res_cnt)
 630                 return -EINVAL;
 631         buffer->length = sizeof(struct acpi_resource) * (res_cnt + 1) + 1;
 632         buffer->pointer = kzalloc(buffer->length - 1, GFP_KERNEL);
 633         if (!buffer->pointer)
 634                 return -ENOMEM;
 635
 636         resource = (struct acpi_resource *)buffer->pointer;
 637         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 638                                      pnpacpi_type_resources, &resource);
 639         if (ACPI_FAILURE(status)) {
 640                 kfree(buffer->pointer);
 641                 dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
 642                 return -EINVAL;
 643         }
 644         /* resource will pointer the end resource now */
 645         resource->type = ACPI_RESOURCE_TYPE_END_TAG;
 646         resource->length = sizeof(struct acpi_resource);
 647
 648         return 0;
 649 }
 650
 651 static void pnpacpi_encode_irq(struct pnp_dev *dev,
 652                                struct acpi_resource *resource,
 653                                struct resource *p)
 654 {
 655         struct acpi_resource_irq *irq = &resource->data.irq;
 656         int triggering, polarity, shareable;
 657
 658         if (!pnp_resource_enabled(p)) {
 659                 irq->interrupt_count = 0;
 660                 pnp_dbg(&dev->dev, "  encode irq (%s)\n",
 661                         p ? "disabled" : "missing");
 662                 return;
 663         }
 664
 665         decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
 666         irq->triggering = triggering;
 667         irq->polarity = polarity;
 668         irq->sharable = shareable;
 669         irq->interrupt_count = 1;
 670         irq->interrupts[0] = p->start;
 671
 672         pnp_dbg(&dev->dev, "  encode irq %d %s %s %s (%d-byte descriptor)\n",
 673                 (int) p->start,
 674                 triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
 675                 polarity == ACPI_ACTIVE_LOW ? "low" : "high",
 676                 irq->sharable == ACPI_SHARED ? "shared" : "exclusive",
 677                 irq->descriptor_length);
 678 }
 679
 680 static void pnpacpi_encode_ext_irq(struct pnp_dev *dev,
 681                                    struct acpi_resource *resource,
 682                                    struct resource *p)
 683 {
 684         struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq;
 685         int triggering, polarity, shareable;
 686
 687         if (!pnp_resource_enabled(p)) {
 688                 extended_irq->interrupt_count = 0;
 689                 pnp_dbg(&dev->dev, "  encode extended irq (%s)\n",
 690                         p ? "disabled" : "missing");
 691                 return;
 692         }
 693
 694         decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
 695         extended_irq->producer_consumer = ACPI_CONSUMER;
 696         extended_irq->triggering = triggering;
 697         extended_irq->polarity = polarity;
 698         extended_irq->sharable = shareable;
 699         extended_irq->interrupt_count = 1;
 700         extended_irq->interrupts[0] = p->start;
 701
 702         pnp_dbg(&dev->dev, "  encode irq %d %s %s %s\n", (int) p->start,
 703                 triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
 704                 polarity == ACPI_ACTIVE_LOW ? "low" : "high",
 705                 extended_irq->sharable == ACPI_SHARED ? "shared" : "exclusive");
 706 }
 707
 708 static void pnpacpi_encode_dma(struct pnp_dev *dev,
 709                                struct acpi_resource *resource,
 710                                struct resource *p)
 711 {
 712         struct acpi_resource_dma *dma = &resource->data.dma;
 713
 714         if (!pnp_resource_enabled(p)) {
 715                 dma->channel_count = 0;
 716                 pnp_dbg(&dev->dev, "  encode dma (%s)\n",
 717                         p ? "disabled" : "missing");
 718                 return;
 719         }
 720
 721         /* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */
 722         switch (p->flags & IORESOURCE_DMA_SPEED_MASK) {
 723         case IORESOURCE_DMA_TYPEA:
 724                 dma->type = ACPI_TYPE_A;
 725                 break;
 726         case IORESOURCE_DMA_TYPEB:
 727                 dma->type = ACPI_TYPE_B;
 728                 break;
 729         case IORESOURCE_DMA_TYPEF:
 730                 dma->type = ACPI_TYPE_F;
 731                 break;
 732         default:
 733                 dma->type = ACPI_COMPATIBILITY;
 734         }
 735
 736         switch (p->flags & IORESOURCE_DMA_TYPE_MASK) {
 737         case IORESOURCE_DMA_8BIT:
 738                 dma->transfer = ACPI_TRANSFER_8;
 739                 break;
 740         case IORESOURCE_DMA_8AND16BIT:
 741                 dma->transfer = ACPI_TRANSFER_8_16;
 742                 break;
 743         default:
 744                 dma->transfer = ACPI_TRANSFER_16;
 745         }
 746
 747         dma->bus_master = !!(p->flags & IORESOURCE_DMA_MASTER);
 748         dma->channel_count = 1;
 749         dma->channels[0] = p->start;
 750
 751         pnp_dbg(&dev->dev, "  encode dma %d "
 752                 "type %#x transfer %#x master %d\n",
 753                 (int) p->start, dma->type, dma->transfer, dma->bus_master);
 754 }
 755
 756 static void pnpacpi_encode_io(struct pnp_dev *dev,
 757                               struct acpi_resource *resource,
 758                               struct resource *p)
 759 {
 760         struct acpi_resource_io *io = &resource->data.io;
 761
 762         if (pnp_resource_enabled(p)) {
 763                 /* Note: pnp_assign_port copies pnp_port->flags into p->flags */
 764                 io->io_decode = (p->flags & IORESOURCE_IO_16BIT_ADDR) ?
 765                     ACPI_DECODE_16 : ACPI_DECODE_10;
 766                 io->minimum = p->start;
 767                 io->maximum = p->end;
 768                 io->alignment = 0;      /* Correct? */
 769                 io->address_length = resource_size(p);
 770         } else {
 771                 io->minimum = 0;
 772                 io->address_length = 0;
 773         }
 774
 775         pnp_dbg(&dev->dev, "  encode io %#x-%#x decode %#x\n", io->minimum,
 776                 io->minimum + io->address_length - 1, io->io_decode);
 777 }
 778
 779 static void pnpacpi_encode_fixed_io(struct pnp_dev *dev,
 780                                     struct acpi_resource *resource,
 781                                     struct resource *p)
 782 {
 783         struct acpi_resource_fixed_io *fixed_io = &resource->data.fixed_io;
 784
 785         if (pnp_resource_enabled(p)) {
 786                 fixed_io->address = p->start;
 787                 fixed_io->address_length = resource_size(p);
 788         } else {
 789                 fixed_io->address = 0;
 790                 fixed_io->address_length = 0;
 791         }
 792
 793         pnp_dbg(&dev->dev, "  encode fixed_io %#x-%#x\n", fixed_io->address,
 794                 fixed_io->address + fixed_io->address_length - 1);
 795 }
 796
 797 static void pnpacpi_encode_mem24(struct pnp_dev *dev,
 798                                  struct acpi_resource *resource,
 799                                  struct resource *p)
 800 {
 801         struct acpi_resource_memory24 *memory24 = &resource->data.memory24;
 802
 803         if (pnp_resource_enabled(p)) {
 804                 /* Note: pnp_assign_mem copies pnp_mem->flags into p->flags */
 805                 memory24->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
 806                     ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
 807                 memory24->minimum = p->start;
 808                 memory24->maximum = p->end;
 809                 memory24->alignment = 0;
 810                 memory24->address_length = resource_size(p);
 811         } else {
 812                 memory24->minimum = 0;
 813                 memory24->address_length = 0;
 814         }
 815
 816         pnp_dbg(&dev->dev, "  encode mem24 %#x-%#x write_protect %#x\n",
 817                 memory24->minimum,
 818                 memory24->minimum + memory24->address_length - 1,
 819                 memory24->write_protect);
 820 }
 821
 822 static void pnpacpi_encode_mem32(struct pnp_dev *dev,
 823                                  struct acpi_resource *resource,
 824                                  struct resource *p)
 825 {
 826         struct acpi_resource_memory32 *memory32 = &resource->data.memory32;
 827
 828         if (pnp_resource_enabled(p)) {
 829                 memory32->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
 830                     ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
 831                 memory32->minimum = p->start;
 832                 memory32->maximum = p->end;
 833                 memory32->alignment = 0;
 834                 memory32->address_length = resource_size(p);
 835         } else {
 836                 memory32->minimum = 0;
 837                 memory32->alignment = 0;
 838         }
 839
 840         pnp_dbg(&dev->dev, "  encode mem32 %#x-%#x write_protect %#x\n",
 841                 memory32->minimum,
 842                 memory32->minimum + memory32->address_length - 1,
 843                 memory32->write_protect);
 844 }
 845
 846 static void pnpacpi_encode_fixed_mem32(struct pnp_dev *dev,
 847                                        struct acpi_resource *resource,
 848                                        struct resource *p)
 849 {
 850         struct acpi_resource_fixed_memory32 *fixed_memory32 = &resource->data.fixed_memory32;
 851
 852         if (pnp_resource_enabled(p)) {
 853                 fixed_memory32->write_protect =
 854                     p->flags & IORESOURCE_MEM_WRITEABLE ?
 855                     ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
 856                 fixed_memory32->address = p->start;
 857                 fixed_memory32->address_length = resource_size(p);
 858         } else {
 859                 fixed_memory32->address = 0;
 860                 fixed_memory32->address_length = 0;
 861         }
 862
 863         pnp_dbg(&dev->dev, "  encode fixed_mem32 %#x-%#x write_protect %#x\n",
 864                 fixed_memory32->address,
 865                 fixed_memory32->address + fixed_memory32->address_length - 1,
 866                 fixed_memory32->write_protect);
 867 }
 868
 869 int pnpacpi_encode_resources(struct pnp_dev *dev, struct acpi_buffer *buffer)
 870 {
 871         int i = 0;
 872         /* pnpacpi_build_resource_template allocates extra mem */
 873         int res_cnt = (buffer->length - 1) / sizeof(struct acpi_resource) - 1;
 874         struct acpi_resource *resource = buffer->pointer;
 875         int port = 0, irq = 0, dma = 0, mem = 0;
 876
 877         pnp_dbg(&dev->dev, "encode %d resources\n", res_cnt);
 878         while (i < res_cnt) {
 879                 switch (resource->type) {
 880                 case ACPI_RESOURCE_TYPE_IRQ:
 881                         pnpacpi_encode_irq(dev, resource,
 882                                pnp_get_resource(dev, IORESOURCE_IRQ, irq));
 883                         irq++;
 884                         break;
 885
 886                 case ACPI_RESOURCE_TYPE_DMA:
 887                         pnpacpi_encode_dma(dev, resource,
 888                                 pnp_get_resource(dev, IORESOURCE_DMA, dma));
 889                         dma++;
 890                         break;
 891                 case ACPI_RESOURCE_TYPE_IO:
 892                         pnpacpi_encode_io(dev, resource,
 893                                 pnp_get_resource(dev, IORESOURCE_IO, port));
 894                         port++;
 895                         break;
 896                 case ACPI_RESOURCE_TYPE_FIXED_IO:
 897                         pnpacpi_encode_fixed_io(dev, resource,
 898                                 pnp_get_resource(dev, IORESOURCE_IO, port));
 899                         port++;
 900                         break;
 901                 case ACPI_RESOURCE_TYPE_MEMORY24:
 902                         pnpacpi_encode_mem24(dev, resource,
 903                                 pnp_get_resource(dev, IORESOURCE_MEM, mem));
 904                         mem++;
 905                         break;
 906                 case ACPI_RESOURCE_TYPE_MEMORY32:
 907                         pnpacpi_encode_mem32(dev, resource,
 908                                 pnp_get_resource(dev, IORESOURCE_MEM, mem));
 909                         mem++;
 910                         break;
 911                 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 912                         pnpacpi_encode_fixed_mem32(dev, resource,
 913                                 pnp_get_resource(dev, IORESOURCE_MEM, mem));
 914                         mem++;
 915                         break;
 916                 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 917                         pnpacpi_encode_ext_irq(dev, resource,
 918                                 pnp_get_resource(dev, IORESOURCE_IRQ, irq));
 919                         irq++;
 920                         break;
 921                 case ACPI_RESOURCE_TYPE_START_DEPENDENT:
 922                 case ACPI_RESOURCE_TYPE_END_DEPENDENT:
 923                 case ACPI_RESOURCE_TYPE_VENDOR:
 924                 case ACPI_RESOURCE_TYPE_END_TAG:
 925                 case ACPI_RESOURCE_TYPE_ADDRESS16:
 926                 case ACPI_RESOURCE_TYPE_ADDRESS32:
 927                 case ACPI_RESOURCE_TYPE_ADDRESS64:
 928                 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 929                 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 930                 default:        /* other type */
 931                         dev_warn(&dev->dev, "can't encode unknown resource "
 932                                  "type %d\n", resource->type);
 933                         return -EINVAL;
 934                 }
 935                 resource++;
 936                 i++;
 937         }
 938         return 0;
 939 }