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;
 184         int i, flags;
 185
 186         if (acpi_dev_resource_memory(res, &r)
 187             || acpi_dev_resource_io(res, &r)
 188             || acpi_dev_resource_address_space(res, &r)
 189             || acpi_dev_resource_ext_address_space(res, &r)) {
 190                 pnp_add_resource(dev, &r);
 191                 return AE_OK;
 192         }
 193
 194         r.flags = 0;
 195         if (acpi_dev_resource_interrupt(res, 0, &r)) {
 196                 pnpacpi_add_irqresource(dev, &r);
 197                 for (i = 1; acpi_dev_resource_interrupt(res, i, &r); i++)
 198                         pnpacpi_add_irqresource(dev, &r);
 199
 200                 if (i > 1) {
 201                         /*
 202                          * The IRQ encoder puts a single interrupt in each
 203                          * descriptor, so if a _CRS descriptor has more than
 204                          * one interrupt, we won't be able to re-encode it.
 205                          */
 206                         if (pnp_can_write(dev)) {
 207                                 dev_warn(&dev->dev, "multiple interrupts in "
 208                                          "_CRS descriptor; configuration can't "
 209                                          "be changed\n");
 210                                 dev->capabilities &= ~PNP_WRITE;
 211                         }
 212                 }
 213                 return AE_OK;
 214         } else if (r.flags & IORESOURCE_DISABLED) {
 215                 pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
 216                 return AE_OK;
 217         }
 218
 219         switch (res->type) {
 220         case ACPI_RESOURCE_TYPE_DMA:
 221                 dma = &res->data.dma;
 222                 if (dma->channel_count > 0 && dma->channels[0] != (u8) -1)
 223                         flags = dma_flags(dev, dma->type, dma->bus_master,
 224                                           dma->transfer);
 225                 else
 226                         flags = IORESOURCE_DISABLED;
 227                 pnp_add_dma_resource(dev, dma->channels[0], flags);
 228                 break;
 229
 230         case ACPI_RESOURCE_TYPE_START_DEPENDENT:
 231         case ACPI_RESOURCE_TYPE_END_DEPENDENT:
 232                 break;
 233
 234         case ACPI_RESOURCE_TYPE_VENDOR:
 235                 vendor_typed = &res->data.vendor_typed;
 236                 pnpacpi_parse_allocated_vendor(dev, vendor_typed);
 237                 break;
 238
 239         case ACPI_RESOURCE_TYPE_END_TAG:
 240                 break;
 241
 242         case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 243                 break;
 244
 245         default:
 246                 dev_warn(&dev->dev, "unknown resource type %d in _CRS\n",
 247                          res->type);
 248                 return AE_ERROR;
 249         }
 250
 251         return AE_OK;
 252 }
 253
 254 int pnpacpi_parse_allocated_resource(struct pnp_dev *dev)
 255 {
 256         struct acpi_device *acpi_dev = dev->data;
 257         acpi_handle handle = acpi_dev->handle;
 258         acpi_status status;
 259
 260         pnp_dbg(&dev->dev, "parse allocated resources\n");
 261
 262         pnp_init_resources(dev);
 263
 264         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 265                                      pnpacpi_allocated_resource, dev);
 266
 267         if (ACPI_FAILURE(status)) {
 268                 if (status != AE_NOT_FOUND)
 269                         dev_err(&dev->dev, "can't evaluate _CRS: %d", status);
 270                 return -EPERM;
 271         }
 272         return 0;
 273 }
 274
 275 static __init void pnpacpi_parse_dma_option(struct pnp_dev *dev,
 276                                             unsigned int option_flags,
 277                                             struct acpi_resource_dma *p)
 278 {
 279         int i;
 280         unsigned char map = 0, flags;
 281
 282         for (i = 0; i < p->channel_count; i++)
 283                 map |= 1 << p->channels[i];
 284
 285         flags = dma_flags(dev, p->type, p->bus_master, p->transfer);
 286         pnp_register_dma_resource(dev, option_flags, map, flags);
 287 }
 288
 289 static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev,
 290                                             unsigned int option_flags,
 291                                             struct acpi_resource_irq *p)
 292 {
 293         int i;
 294         pnp_irq_mask_t map;
 295         unsigned char flags;
 296
 297         bitmap_zero(map.bits, PNP_IRQ_NR);
 298         for (i = 0; i < p->interrupt_count; i++)
 299                 if (p->interrupts[i])
 300                         __set_bit(p->interrupts[i], map.bits);
 301
 302         flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->sharable);
 303         pnp_register_irq_resource(dev, option_flags, &map, flags);
 304 }
 305
 306 static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev,
 307                                         unsigned int option_flags,
 308                                         struct acpi_resource_extended_irq *p)
 309 {
 310         int i;
 311         pnp_irq_mask_t map;
 312         unsigned char flags;
 313
 314         bitmap_zero(map.bits, PNP_IRQ_NR);
 315         for (i = 0; i < p->interrupt_count; i++) {
 316                 if (p->interrupts[i]) {
 317                         if (p->interrupts[i] < PNP_IRQ_NR)
 318                                 __set_bit(p->interrupts[i], map.bits);
 319                         else
 320                                 dev_err(&dev->dev, "ignoring IRQ %d option "
 321                                         "(too large for %d entry bitmap)\n",
 322                                         p->interrupts[i], PNP_IRQ_NR);
 323                 }
 324         }
 325
 326         flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->sharable);
 327         pnp_register_irq_resource(dev, option_flags, &map, flags);
 328 }
 329
 330 static __init void pnpacpi_parse_port_option(struct pnp_dev *dev,
 331                                              unsigned int option_flags,
 332                                              struct acpi_resource_io *io)
 333 {
 334         unsigned char flags = 0;
 335
 336         if (io->io_decode == ACPI_DECODE_16)
 337                 flags = IORESOURCE_IO_16BIT_ADDR;
 338         pnp_register_port_resource(dev, option_flags, io->minimum, io->maximum,
 339                                    io->alignment, io->address_length, flags);
 340 }
 341
 342 static __init void pnpacpi_parse_fixed_port_option(struct pnp_dev *dev,
 343                                         unsigned int option_flags,
 344                                         struct acpi_resource_fixed_io *io)
 345 {
 346         pnp_register_port_resource(dev, option_flags, io->address, io->address,
 347                                    0, io->address_length, IORESOURCE_IO_FIXED);
 348 }
 349
 350 static __init void pnpacpi_parse_mem24_option(struct pnp_dev *dev,
 351                                               unsigned int option_flags,
 352                                               struct acpi_resource_memory24 *p)
 353 {
 354         unsigned char flags = 0;
 355
 356         if (p->write_protect == ACPI_READ_WRITE_MEMORY)
 357                 flags = IORESOURCE_MEM_WRITEABLE;
 358         pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
 359                                   p->alignment, p->address_length, flags);
 360 }
 361
 362 static __init void pnpacpi_parse_mem32_option(struct pnp_dev *dev,
 363                                               unsigned int option_flags,
 364                                               struct acpi_resource_memory32 *p)
 365 {
 366         unsigned char flags = 0;
 367
 368         if (p->write_protect == ACPI_READ_WRITE_MEMORY)
 369                 flags = IORESOURCE_MEM_WRITEABLE;
 370         pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
 371                                   p->alignment, p->address_length, flags);
 372 }
 373
 374 static __init void pnpacpi_parse_fixed_mem32_option(struct pnp_dev *dev,
 375                                         unsigned int option_flags,
 376                                         struct acpi_resource_fixed_memory32 *p)
 377 {
 378         unsigned char flags = 0;
 379
 380         if (p->write_protect == ACPI_READ_WRITE_MEMORY)
 381                 flags = IORESOURCE_MEM_WRITEABLE;
 382         pnp_register_mem_resource(dev, option_flags, p->address, p->address,
 383                                   0, p->address_length, flags);
 384 }
 385
 386 static __init void pnpacpi_parse_address_option(struct pnp_dev *dev,
 387                                                 unsigned int option_flags,
 388                                                 struct acpi_resource *r)
 389 {
 390         struct acpi_resource_address64 addr, *p = &addr;
 391         acpi_status status;
 392         unsigned char flags = 0;
 393
 394         status = acpi_resource_to_address64(r, p);
 395         if (ACPI_FAILURE(status)) {
 396                 dev_warn(&dev->dev, "can't convert resource type %d\n",
 397                          r->type);
 398                 return;
 399         }
 400
 401         if (p->resource_type == ACPI_MEMORY_RANGE) {
 402                 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
 403                         flags = IORESOURCE_MEM_WRITEABLE;
 404                 pnp_register_mem_resource(dev, option_flags, p->minimum,
 405                                           p->minimum, 0, p->address_length,
 406                                           flags);
 407         } else if (p->resource_type == ACPI_IO_RANGE)
 408                 pnp_register_port_resource(dev, option_flags, p->minimum,
 409                                            p->minimum, 0, p->address_length,
 410                                            IORESOURCE_IO_FIXED);
 411 }
 412
 413 static __init void pnpacpi_parse_ext_address_option(struct pnp_dev *dev,
 414                                                     unsigned int option_flags,
 415                                                     struct acpi_resource *r)
 416 {
 417         struct acpi_resource_extended_address64 *p = &r->data.ext_address64;
 418         unsigned char flags = 0;
 419
 420         if (p->resource_type == ACPI_MEMORY_RANGE) {
 421                 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
 422                         flags = IORESOURCE_MEM_WRITEABLE;
 423                 pnp_register_mem_resource(dev, option_flags, p->minimum,
 424                                           p->minimum, 0, p->address_length,
 425                                           flags);
 426         } else if (p->resource_type == ACPI_IO_RANGE)
 427                 pnp_register_port_resource(dev, option_flags, p->minimum,
 428                                            p->minimum, 0, p->address_length,
 429                                            IORESOURCE_IO_FIXED);
 430 }
 431
 432 struct acpipnp_parse_option_s {
 433         struct pnp_dev *dev;
 434         unsigned int option_flags;
 435 };
 436
 437 static __init acpi_status pnpacpi_option_resource(struct acpi_resource *res,
 438                                                   void *data)
 439 {
 440         int priority;
 441         struct acpipnp_parse_option_s *parse_data = data;
 442         struct pnp_dev *dev = parse_data->dev;
 443         unsigned int option_flags = parse_data->option_flags;
 444
 445         switch (res->type) {
 446         case ACPI_RESOURCE_TYPE_IRQ:
 447                 pnpacpi_parse_irq_option(dev, option_flags, &res->data.irq);
 448                 break;
 449
 450         case ACPI_RESOURCE_TYPE_DMA:
 451                 pnpacpi_parse_dma_option(dev, option_flags, &res->data.dma);
 452                 break;
 453
 454         case ACPI_RESOURCE_TYPE_START_DEPENDENT:
 455                 switch (res->data.start_dpf.compatibility_priority) {
 456                 case ACPI_GOOD_CONFIGURATION:
 457                         priority = PNP_RES_PRIORITY_PREFERRED;
 458                         break;
 459
 460                 case ACPI_ACCEPTABLE_CONFIGURATION:
 461                         priority = PNP_RES_PRIORITY_ACCEPTABLE;
 462                         break;
 463
 464                 case ACPI_SUB_OPTIMAL_CONFIGURATION:
 465                         priority = PNP_RES_PRIORITY_FUNCTIONAL;
 466                         break;
 467                 default:
 468                         priority = PNP_RES_PRIORITY_INVALID;
 469                         break;
 470                 }
 471                 parse_data->option_flags = pnp_new_dependent_set(dev, priority);
 472                 break;
 473
 474         case ACPI_RESOURCE_TYPE_END_DEPENDENT:
 475                 parse_data->option_flags = 0;
 476                 break;
 477
 478         case ACPI_RESOURCE_TYPE_IO:
 479                 pnpacpi_parse_port_option(dev, option_flags, &res->data.io);
 480                 break;
 481
 482         case ACPI_RESOURCE_TYPE_FIXED_IO:
 483                 pnpacpi_parse_fixed_port_option(dev, option_flags,
 484                                                 &res->data.fixed_io);
 485                 break;
 486
 487         case ACPI_RESOURCE_TYPE_VENDOR:
 488         case ACPI_RESOURCE_TYPE_END_TAG:
 489                 break;
 490
 491         case ACPI_RESOURCE_TYPE_MEMORY24:
 492                 pnpacpi_parse_mem24_option(dev, option_flags,
 493                                            &res->data.memory24);
 494                 break;
 495
 496         case ACPI_RESOURCE_TYPE_MEMORY32:
 497                 pnpacpi_parse_mem32_option(dev, option_flags,
 498                                            &res->data.memory32);
 499                 break;
 500
 501         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 502                 pnpacpi_parse_fixed_mem32_option(dev, option_flags,
 503                                                  &res->data.fixed_memory32);
 504                 break;
 505
 506         case ACPI_RESOURCE_TYPE_ADDRESS16:
 507         case ACPI_RESOURCE_TYPE_ADDRESS32:
 508         case ACPI_RESOURCE_TYPE_ADDRESS64:
 509                 pnpacpi_parse_address_option(dev, option_flags, res);
 510                 break;
 511
 512         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 513                 pnpacpi_parse_ext_address_option(dev, option_flags, res);
 514                 break;
 515
 516         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 517                 pnpacpi_parse_ext_irq_option(dev, option_flags,
 518                                              &res->data.extended_irq);
 519                 break;
 520
 521         case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 522                 break;
 523
 524         default:
 525                 dev_warn(&dev->dev, "unknown resource type %d in _PRS\n",
 526                          res->type);
 527                 return AE_ERROR;
 528         }
 529
 530         return AE_OK;
 531 }
 532
 533 int __init pnpacpi_parse_resource_option_data(struct pnp_dev *dev)
 534 {
 535         struct acpi_device *acpi_dev = dev->data;
 536         acpi_handle handle = acpi_dev->handle;
 537         acpi_status status;
 538         struct acpipnp_parse_option_s parse_data;
 539
 540         pnp_dbg(&dev->dev, "parse resource options\n");
 541
 542         parse_data.dev = dev;
 543         parse_data.option_flags = 0;
 544
 545         status = acpi_walk_resources(handle, METHOD_NAME__PRS,
 546                                      pnpacpi_option_resource, &parse_data);
 547
 548         if (ACPI_FAILURE(status)) {
 549                 if (status != AE_NOT_FOUND)
 550                         dev_err(&dev->dev, "can't evaluate _PRS: %d", status);
 551                 return -EPERM;
 552         }
 553         return 0;
 554 }
 555
 556 static int pnpacpi_supported_resource(struct acpi_resource *res)
 557 {
 558         switch (res->type) {
 559         case ACPI_RESOURCE_TYPE_IRQ:
 560         case ACPI_RESOURCE_TYPE_DMA:
 561         case ACPI_RESOURCE_TYPE_IO:
 562         case ACPI_RESOURCE_TYPE_FIXED_IO:
 563         case ACPI_RESOURCE_TYPE_MEMORY24:
 564         case ACPI_RESOURCE_TYPE_MEMORY32:
 565         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 566         case ACPI_RESOURCE_TYPE_ADDRESS16:
 567         case ACPI_RESOURCE_TYPE_ADDRESS32:
 568         case ACPI_RESOURCE_TYPE_ADDRESS64:
 569         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 570         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 571                 return 1;
 572         }
 573         return 0;
 574 }
 575
 576 /*
 577  * Set resource
 578  */
 579 static acpi_status pnpacpi_count_resources(struct acpi_resource *res,
 580                                            void *data)
 581 {
 582         int *res_cnt = data;
 583
 584         if (pnpacpi_supported_resource(res))
 585                 (*res_cnt)++;
 586         return AE_OK;
 587 }
 588
 589 static acpi_status pnpacpi_type_resources(struct acpi_resource *res, void *data)
 590 {
 591         struct acpi_resource **resource = data;
 592
 593         if (pnpacpi_supported_resource(res)) {
 594                 (*resource)->type = res->type;
 595                 (*resource)->length = sizeof(struct acpi_resource);
 596                 if (res->type == ACPI_RESOURCE_TYPE_IRQ)
 597                         (*resource)->data.irq.descriptor_length =
 598                                         res->data.irq.descriptor_length;
 599                 (*resource)++;
 600         }
 601
 602         return AE_OK;
 603 }
 604
 605 int pnpacpi_build_resource_template(struct pnp_dev *dev,
 606                                     struct acpi_buffer *buffer)
 607 {
 608         struct acpi_device *acpi_dev = dev->data;
 609         acpi_handle handle = acpi_dev->handle;
 610         struct acpi_resource *resource;
 611         int res_cnt = 0;
 612         acpi_status status;
 613
 614         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 615                                      pnpacpi_count_resources, &res_cnt);
 616         if (ACPI_FAILURE(status)) {
 617                 dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
 618                 return -EINVAL;
 619         }
 620         if (!res_cnt)
 621                 return -EINVAL;
 622         buffer->length = sizeof(struct acpi_resource) * (res_cnt + 1) + 1;
 623         buffer->pointer = kzalloc(buffer->length - 1, GFP_KERNEL);
 624         if (!buffer->pointer)
 625                 return -ENOMEM;
 626
 627         resource = (struct acpi_resource *)buffer->pointer;
 628         status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 629                                      pnpacpi_type_resources, &resource);
 630         if (ACPI_FAILURE(status)) {
 631                 kfree(buffer->pointer);
 632                 dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
 633                 return -EINVAL;
 634         }
 635         /* resource will pointer the end resource now */
 636         resource->type = ACPI_RESOURCE_TYPE_END_TAG;
 637         resource->length = sizeof(struct acpi_resource);
 638
 639         return 0;
 640 }
 641
 642 static void pnpacpi_encode_irq(struct pnp_dev *dev,
 643                                struct acpi_resource *resource,
 644                                struct resource *p)
 645 {
 646         struct acpi_resource_irq *irq = &resource->data.irq;
 647         int triggering, polarity, shareable;
 648
 649         if (!pnp_resource_enabled(p)) {
 650                 irq->interrupt_count = 0;
 651                 pnp_dbg(&dev->dev, "  encode irq (%s)\n",
 652                         p ? "disabled" : "missing");
 653                 return;
 654         }
 655
 656         decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
 657         irq->triggering = triggering;
 658         irq->polarity = polarity;
 659         irq->sharable = shareable;
 660         irq->interrupt_count = 1;
 661         irq->interrupts[0] = p->start;
 662
 663         pnp_dbg(&dev->dev, "  encode irq %d %s %s %s (%d-byte descriptor)\n",
 664                 (int) p->start,
 665                 triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
 666                 polarity == ACPI_ACTIVE_LOW ? "low" : "high",
 667                 irq->sharable == ACPI_SHARED ? "shared" : "exclusive",
 668                 irq->descriptor_length);
 669 }
 670
 671 static void pnpacpi_encode_ext_irq(struct pnp_dev *dev,
 672                                    struct acpi_resource *resource,
 673                                    struct resource *p)
 674 {
 675         struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq;
 676         int triggering, polarity, shareable;
 677
 678         if (!pnp_resource_enabled(p)) {
 679                 extended_irq->interrupt_count = 0;
 680                 pnp_dbg(&dev->dev, "  encode extended irq (%s)\n",
 681                         p ? "disabled" : "missing");
 682                 return;
 683         }
 684
 685         decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
 686         extended_irq->producer_consumer = ACPI_CONSUMER;
 687         extended_irq->triggering = triggering;
 688         extended_irq->polarity = polarity;
 689         extended_irq->sharable = shareable;
 690         extended_irq->interrupt_count = 1;
 691         extended_irq->interrupts[0] = p->start;
 692
 693         pnp_dbg(&dev->dev, "  encode irq %d %s %s %s\n", (int) p->start,
 694                 triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
 695                 polarity == ACPI_ACTIVE_LOW ? "low" : "high",
 696                 extended_irq->sharable == ACPI_SHARED ? "shared" : "exclusive");
 697 }
 698
 699 static void pnpacpi_encode_dma(struct pnp_dev *dev,
 700                                struct acpi_resource *resource,
 701                                struct resource *p)
 702 {
 703         struct acpi_resource_dma *dma = &resource->data.dma;
 704
 705         if (!pnp_resource_enabled(p)) {
 706                 dma->channel_count = 0;
 707                 pnp_dbg(&dev->dev, "  encode dma (%s)\n",
 708                         p ? "disabled" : "missing");
 709                 return;
 710         }
 711
 712         /* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */
 713         switch (p->flags & IORESOURCE_DMA_SPEED_MASK) {
 714         case IORESOURCE_DMA_TYPEA:
 715                 dma->type = ACPI_TYPE_A;
 716                 break;
 717         case IORESOURCE_DMA_TYPEB:
 718                 dma->type = ACPI_TYPE_B;
 719                 break;
 720         case IORESOURCE_DMA_TYPEF:
 721                 dma->type = ACPI_TYPE_F;
 722                 break;
 723         default:
 724                 dma->type = ACPI_COMPATIBILITY;
 725         }
 726
 727         switch (p->flags & IORESOURCE_DMA_TYPE_MASK) {
 728         case IORESOURCE_DMA_8BIT:
 729                 dma->transfer = ACPI_TRANSFER_8;
 730                 break;
 731         case IORESOURCE_DMA_8AND16BIT:
 732                 dma->transfer = ACPI_TRANSFER_8_16;
 733                 break;
 734         default:
 735                 dma->transfer = ACPI_TRANSFER_16;
 736         }
 737
 738         dma->bus_master = !!(p->flags & IORESOURCE_DMA_MASTER);
 739         dma->channel_count = 1;
 740         dma->channels[0] = p->start;
 741
 742         pnp_dbg(&dev->dev, "  encode dma %d "
 743                 "type %#x transfer %#x master %d\n",
 744                 (int) p->start, dma->type, dma->transfer, dma->bus_master);
 745 }
 746
 747 static void pnpacpi_encode_io(struct pnp_dev *dev,
 748                               struct acpi_resource *resource,
 749                               struct resource *p)
 750 {
 751         struct acpi_resource_io *io = &resource->data.io;
 752
 753         if (pnp_resource_enabled(p)) {
 754                 /* Note: pnp_assign_port copies pnp_port->flags into p->flags */
 755                 io->io_decode = (p->flags & IORESOURCE_IO_16BIT_ADDR) ?
 756                     ACPI_DECODE_16 : ACPI_DECODE_10;
 757                 io->minimum = p->start;
 758                 io->maximum = p->end;
 759                 io->alignment = 0;      /* Correct? */
 760                 io->address_length = resource_size(p);
 761         } else {
 762                 io->minimum = 0;
 763                 io->address_length = 0;
 764         }
 765
 766         pnp_dbg(&dev->dev, "  encode io %#x-%#x decode %#x\n", io->minimum,
 767                 io->minimum + io->address_length - 1, io->io_decode);
 768 }
 769
 770 static void pnpacpi_encode_fixed_io(struct pnp_dev *dev,
 771                                     struct acpi_resource *resource,
 772                                     struct resource *p)
 773 {
 774         struct acpi_resource_fixed_io *fixed_io = &resource->data.fixed_io;
 775
 776         if (pnp_resource_enabled(p)) {
 777                 fixed_io->address = p->start;
 778                 fixed_io->address_length = resource_size(p);
 779         } else {
 780                 fixed_io->address = 0;
 781                 fixed_io->address_length = 0;
 782         }
 783
 784         pnp_dbg(&dev->dev, "  encode fixed_io %#x-%#x\n", fixed_io->address,
 785                 fixed_io->address + fixed_io->address_length - 1);
 786 }
 787
 788 static void pnpacpi_encode_mem24(struct pnp_dev *dev,
 789                                  struct acpi_resource *resource,
 790                                  struct resource *p)
 791 {
 792         struct acpi_resource_memory24 *memory24 = &resource->data.memory24;
 793
 794         if (pnp_resource_enabled(p)) {
 795                 /* Note: pnp_assign_mem copies pnp_mem->flags into p->flags */
 796                 memory24->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
 797                     ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
 798                 memory24->minimum = p->start;
 799                 memory24->maximum = p->end;
 800                 memory24->alignment = 0;
 801                 memory24->address_length = resource_size(p);
 802         } else {
 803                 memory24->minimum = 0;
 804                 memory24->address_length = 0;
 805         }
 806
 807         pnp_dbg(&dev->dev, "  encode mem24 %#x-%#x write_protect %#x\n",
 808                 memory24->minimum,
 809                 memory24->minimum + memory24->address_length - 1,
 810                 memory24->write_protect);
 811 }
 812
 813 static void pnpacpi_encode_mem32(struct pnp_dev *dev,
 814                                  struct acpi_resource *resource,
 815                                  struct resource *p)
 816 {
 817         struct acpi_resource_memory32 *memory32 = &resource->data.memory32;
 818
 819         if (pnp_resource_enabled(p)) {
 820                 memory32->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
 821                     ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
 822                 memory32->minimum = p->start;
 823                 memory32->maximum = p->end;
 824                 memory32->alignment = 0;
 825                 memory32->address_length = resource_size(p);
 826         } else {
 827                 memory32->minimum = 0;
 828                 memory32->alignment = 0;
 829         }
 830
 831         pnp_dbg(&dev->dev, "  encode mem32 %#x-%#x write_protect %#x\n",
 832                 memory32->minimum,
 833                 memory32->minimum + memory32->address_length - 1,
 834                 memory32->write_protect);
 835 }
 836
 837 static void pnpacpi_encode_fixed_mem32(struct pnp_dev *dev,
 838                                        struct acpi_resource *resource,
 839                                        struct resource *p)
 840 {
 841         struct acpi_resource_fixed_memory32 *fixed_memory32 = &resource->data.fixed_memory32;
 842
 843         if (pnp_resource_enabled(p)) {
 844                 fixed_memory32->write_protect =
 845                     p->flags & IORESOURCE_MEM_WRITEABLE ?
 846                     ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
 847                 fixed_memory32->address = p->start;
 848                 fixed_memory32->address_length = resource_size(p);
 849         } else {
 850                 fixed_memory32->address = 0;
 851                 fixed_memory32->address_length = 0;
 852         }
 853
 854         pnp_dbg(&dev->dev, "  encode fixed_mem32 %#x-%#x write_protect %#x\n",
 855                 fixed_memory32->address,
 856                 fixed_memory32->address + fixed_memory32->address_length - 1,
 857                 fixed_memory32->write_protect);
 858 }
 859
 860 int pnpacpi_encode_resources(struct pnp_dev *dev, struct acpi_buffer *buffer)
 861 {
 862         int i = 0;
 863         /* pnpacpi_build_resource_template allocates extra mem */
 864         int res_cnt = (buffer->length - 1) / sizeof(struct acpi_resource) - 1;
 865         struct acpi_resource *resource = buffer->pointer;
 866         int port = 0, irq = 0, dma = 0, mem = 0;
 867
 868         pnp_dbg(&dev->dev, "encode %d resources\n", res_cnt);
 869         while (i < res_cnt) {
 870                 switch (resource->type) {
 871                 case ACPI_RESOURCE_TYPE_IRQ:
 872                         pnpacpi_encode_irq(dev, resource,
 873                                pnp_get_resource(dev, IORESOURCE_IRQ, irq));
 874                         irq++;
 875                         break;
 876
 877                 case ACPI_RESOURCE_TYPE_DMA:
 878                         pnpacpi_encode_dma(dev, resource,
 879                                 pnp_get_resource(dev, IORESOURCE_DMA, dma));
 880                         dma++;
 881                         break;
 882                 case ACPI_RESOURCE_TYPE_IO:
 883                         pnpacpi_encode_io(dev, resource,
 884                                 pnp_get_resource(dev, IORESOURCE_IO, port));
 885                         port++;
 886                         break;
 887                 case ACPI_RESOURCE_TYPE_FIXED_IO:
 888                         pnpacpi_encode_fixed_io(dev, resource,
 889                                 pnp_get_resource(dev, IORESOURCE_IO, port));
 890                         port++;
 891                         break;
 892                 case ACPI_RESOURCE_TYPE_MEMORY24:
 893                         pnpacpi_encode_mem24(dev, resource,
 894                                 pnp_get_resource(dev, IORESOURCE_MEM, mem));
 895                         mem++;
 896                         break;
 897                 case ACPI_RESOURCE_TYPE_MEMORY32:
 898                         pnpacpi_encode_mem32(dev, resource,
 899                                 pnp_get_resource(dev, IORESOURCE_MEM, mem));
 900                         mem++;
 901                         break;
 902                 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 903                         pnpacpi_encode_fixed_mem32(dev, resource,
 904                                 pnp_get_resource(dev, IORESOURCE_MEM, mem));
 905                         mem++;
 906                         break;
 907                 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 908                         pnpacpi_encode_ext_irq(dev, resource,
 909                                 pnp_get_resource(dev, IORESOURCE_IRQ, irq));
 910                         irq++;
 911                         break;
 912                 case ACPI_RESOURCE_TYPE_START_DEPENDENT:
 913                 case ACPI_RESOURCE_TYPE_END_DEPENDENT:
 914                 case ACPI_RESOURCE_TYPE_VENDOR:
 915                 case ACPI_RESOURCE_TYPE_END_TAG:
 916                 case ACPI_RESOURCE_TYPE_ADDRESS16:
 917                 case ACPI_RESOURCE_TYPE_ADDRESS32:
 918                 case ACPI_RESOURCE_TYPE_ADDRESS64:
 919                 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 920                 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 921                 default:        /* other type */
 922                         dev_warn(&dev->dev, "can't encode unknown resource "
 923                                  "type %d\n", resource->type);
 924                         return -EINVAL;
 925                 }
 926                 resource++;
 927                 i++;
 928         }
 929         return 0;
 930 }