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, u8 *triggering, 32 u8 *polarity, u8 *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_win win = {{0}, 0}; 184 struct resource *r = &win.res; 185 int i, flags; 186 187 if (acpi_dev_resource_address_space(res, &win) 188 || acpi_dev_resource_ext_address_space(res, &win)) { 189 pnp_add_resource(dev, &win.res); 190 return AE_OK; 191 } 192 193 r->flags = 0; 194 if (acpi_dev_resource_interrupt(res, 0, r)) { 195 pnpacpi_add_irqresource(dev, r); 196 for (i = 1; acpi_dev_resource_interrupt(res, i, r); i++) 197 pnpacpi_add_irqresource(dev, r); 198 199 if (i > 1) { 200 /* 201 * The IRQ encoder puts a single interrupt in each 202 * descriptor, so if a _CRS descriptor has more than 203 * one interrupt, we won't be able to re-encode it. 204 */ 205 if (pnp_can_write(dev)) { 206 dev_warn(&dev->dev, "multiple interrupts in " 207 "_CRS descriptor; configuration can't " 208 "be changed\n"); 209 dev->capabilities &= ~PNP_WRITE; 210 } 211 } 212 return AE_OK; 213 } else if (r->flags & IORESOURCE_DISABLED) { 214 pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED); 215 return AE_OK; 216 } 217 218 switch (res->type) { 219 case ACPI_RESOURCE_TYPE_MEMORY24: 220 case ACPI_RESOURCE_TYPE_MEMORY32: 221 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: 222 if (acpi_dev_resource_memory(res, r)) 223 pnp_add_resource(dev, r); 224 break; 225 case ACPI_RESOURCE_TYPE_IO: 226 case ACPI_RESOURCE_TYPE_FIXED_IO: 227 if (acpi_dev_resource_io(res, r)) 228 pnp_add_resource(dev, r); 229 break; 230 case ACPI_RESOURCE_TYPE_DMA: 231 dma = &res->data.dma; 232 if (dma->channel_count > 0 && dma->channels[0] != (u8) -1) 233 flags = dma_flags(dev, dma->type, dma->bus_master, 234 dma->transfer); 235 else 236 flags = IORESOURCE_DISABLED; 237 pnp_add_dma_resource(dev, dma->channels[0], flags); 238 break; 239 240 case ACPI_RESOURCE_TYPE_START_DEPENDENT: 241 case ACPI_RESOURCE_TYPE_END_DEPENDENT: 242 break; 243 244 case ACPI_RESOURCE_TYPE_VENDOR: 245 vendor_typed = &res->data.vendor_typed; 246 pnpacpi_parse_allocated_vendor(dev, vendor_typed); 247 break; 248 249 case ACPI_RESOURCE_TYPE_END_TAG: 250 break; 251 252 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: 253 break; 254 255 case ACPI_RESOURCE_TYPE_SERIAL_BUS: 256 /* serial bus connections (I2C/SPI/UART) are not pnp */ 257 break; 258 259 default: 260 dev_warn(&dev->dev, "unknown resource type %d in _CRS\n", 261 res->type); 262 return AE_ERROR; 263 } 264 265 return AE_OK; 266 } 267 268 int pnpacpi_parse_allocated_resource(struct pnp_dev *dev) 269 { 270 struct acpi_device *acpi_dev = dev->data; 271 acpi_handle handle = acpi_dev->handle; 272 acpi_status status; 273 274 pnp_dbg(&dev->dev, "parse allocated resources\n"); 275 276 pnp_init_resources(dev); 277 278 status = acpi_walk_resources(handle, METHOD_NAME__CRS, 279 pnpacpi_allocated_resource, dev); 280 281 if (ACPI_FAILURE(status)) { 282 if (status != AE_NOT_FOUND) 283 dev_err(&dev->dev, "can't evaluate _CRS: %d", status); 284 return -EPERM; 285 } 286 return 0; 287 } 288 289 static __init void pnpacpi_parse_dma_option(struct pnp_dev *dev, 290 unsigned int option_flags, 291 struct acpi_resource_dma *p) 292 { 293 int i; 294 unsigned char map = 0, flags; 295 296 for (i = 0; i < p->channel_count; i++) 297 map |= 1 << p->channels[i]; 298 299 flags = dma_flags(dev, p->type, p->bus_master, p->transfer); 300 pnp_register_dma_resource(dev, option_flags, map, flags); 301 } 302 303 static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev, 304 unsigned int option_flags, 305 struct acpi_resource_irq *p) 306 { 307 int i; 308 pnp_irq_mask_t map; 309 unsigned char flags; 310 311 bitmap_zero(map.bits, PNP_IRQ_NR); 312 for (i = 0; i < p->interrupt_count; i++) 313 if (p->interrupts[i]) 314 __set_bit(p->interrupts[i], map.bits); 315 316 flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->sharable); 317 pnp_register_irq_resource(dev, option_flags, &map, flags); 318 } 319 320 static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev, 321 unsigned int option_flags, 322 struct acpi_resource_extended_irq *p) 323 { 324 int i; 325 pnp_irq_mask_t map; 326 unsigned char flags; 327 328 bitmap_zero(map.bits, PNP_IRQ_NR); 329 for (i = 0; i < p->interrupt_count; i++) { 330 if (p->interrupts[i]) { 331 if (p->interrupts[i] < PNP_IRQ_NR) 332 __set_bit(p->interrupts[i], map.bits); 333 else 334 dev_err(&dev->dev, "ignoring IRQ %d option " 335 "(too large for %d entry bitmap)\n", 336 p->interrupts[i], PNP_IRQ_NR); 337 } 338 } 339 340 flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->sharable); 341 pnp_register_irq_resource(dev, option_flags, &map, flags); 342 } 343 344 static __init void pnpacpi_parse_port_option(struct pnp_dev *dev, 345 unsigned int option_flags, 346 struct acpi_resource_io *io) 347 { 348 unsigned char flags = 0; 349 350 if (io->io_decode == ACPI_DECODE_16) 351 flags = IORESOURCE_IO_16BIT_ADDR; 352 pnp_register_port_resource(dev, option_flags, io->minimum, io->maximum, 353 io->alignment, io->address_length, flags); 354 } 355 356 static __init void pnpacpi_parse_fixed_port_option(struct pnp_dev *dev, 357 unsigned int option_flags, 358 struct acpi_resource_fixed_io *io) 359 { 360 pnp_register_port_resource(dev, option_flags, io->address, io->address, 361 0, io->address_length, IORESOURCE_IO_FIXED); 362 } 363 364 static __init void pnpacpi_parse_mem24_option(struct pnp_dev *dev, 365 unsigned int option_flags, 366 struct acpi_resource_memory24 *p) 367 { 368 unsigned char flags = 0; 369 370 if (p->write_protect == ACPI_READ_WRITE_MEMORY) 371 flags = IORESOURCE_MEM_WRITEABLE; 372 pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum, 373 p->alignment, p->address_length, flags); 374 } 375 376 static __init void pnpacpi_parse_mem32_option(struct pnp_dev *dev, 377 unsigned int option_flags, 378 struct acpi_resource_memory32 *p) 379 { 380 unsigned char flags = 0; 381 382 if (p->write_protect == ACPI_READ_WRITE_MEMORY) 383 flags = IORESOURCE_MEM_WRITEABLE; 384 pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum, 385 p->alignment, p->address_length, flags); 386 } 387 388 static __init void pnpacpi_parse_fixed_mem32_option(struct pnp_dev *dev, 389 unsigned int option_flags, 390 struct acpi_resource_fixed_memory32 *p) 391 { 392 unsigned char flags = 0; 393 394 if (p->write_protect == ACPI_READ_WRITE_MEMORY) 395 flags = IORESOURCE_MEM_WRITEABLE; 396 pnp_register_mem_resource(dev, option_flags, p->address, p->address, 397 0, p->address_length, flags); 398 } 399 400 static __init void pnpacpi_parse_address_option(struct pnp_dev *dev, 401 unsigned int option_flags, 402 struct acpi_resource *r) 403 { 404 struct acpi_resource_address64 addr, *p = &addr; 405 acpi_status status; 406 unsigned char flags = 0; 407 408 status = acpi_resource_to_address64(r, p); 409 if (ACPI_FAILURE(status)) { 410 dev_warn(&dev->dev, "can't convert resource type %d\n", 411 r->type); 412 return; 413 } 414 415 if (p->resource_type == ACPI_MEMORY_RANGE) { 416 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY) 417 flags = IORESOURCE_MEM_WRITEABLE; 418 pnp_register_mem_resource(dev, option_flags, p->address.minimum, 419 p->address.minimum, 0, p->address.address_length, 420 flags); 421 } else if (p->resource_type == ACPI_IO_RANGE) 422 pnp_register_port_resource(dev, option_flags, p->address.minimum, 423 p->address.minimum, 0, p->address.address_length, 424 IORESOURCE_IO_FIXED); 425 } 426 427 static __init void pnpacpi_parse_ext_address_option(struct pnp_dev *dev, 428 unsigned int option_flags, 429 struct acpi_resource *r) 430 { 431 struct acpi_resource_extended_address64 *p = &r->data.ext_address64; 432 unsigned char flags = 0; 433 434 if (p->resource_type == ACPI_MEMORY_RANGE) { 435 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY) 436 flags = IORESOURCE_MEM_WRITEABLE; 437 pnp_register_mem_resource(dev, option_flags, p->address.minimum, 438 p->address.minimum, 0, p->address.address_length, 439 flags); 440 } else if (p->resource_type == ACPI_IO_RANGE) 441 pnp_register_port_resource(dev, option_flags, p->address.minimum, 442 p->address.minimum, 0, p->address.address_length, 443 IORESOURCE_IO_FIXED); 444 } 445 446 struct acpipnp_parse_option_s { 447 struct pnp_dev *dev; 448 unsigned int option_flags; 449 }; 450 451 static __init acpi_status pnpacpi_option_resource(struct acpi_resource *res, 452 void *data) 453 { 454 int priority; 455 struct acpipnp_parse_option_s *parse_data = data; 456 struct pnp_dev *dev = parse_data->dev; 457 unsigned int option_flags = parse_data->option_flags; 458 459 switch (res->type) { 460 case ACPI_RESOURCE_TYPE_IRQ: 461 pnpacpi_parse_irq_option(dev, option_flags, &res->data.irq); 462 break; 463 464 case ACPI_RESOURCE_TYPE_DMA: 465 pnpacpi_parse_dma_option(dev, option_flags, &res->data.dma); 466 break; 467 468 case ACPI_RESOURCE_TYPE_START_DEPENDENT: 469 switch (res->data.start_dpf.compatibility_priority) { 470 case ACPI_GOOD_CONFIGURATION: 471 priority = PNP_RES_PRIORITY_PREFERRED; 472 break; 473 474 case ACPI_ACCEPTABLE_CONFIGURATION: 475 priority = PNP_RES_PRIORITY_ACCEPTABLE; 476 break; 477 478 case ACPI_SUB_OPTIMAL_CONFIGURATION: 479 priority = PNP_RES_PRIORITY_FUNCTIONAL; 480 break; 481 default: 482 priority = PNP_RES_PRIORITY_INVALID; 483 break; 484 } 485 parse_data->option_flags = pnp_new_dependent_set(dev, priority); 486 break; 487 488 case ACPI_RESOURCE_TYPE_END_DEPENDENT: 489 parse_data->option_flags = 0; 490 break; 491 492 case ACPI_RESOURCE_TYPE_IO: 493 pnpacpi_parse_port_option(dev, option_flags, &res->data.io); 494 break; 495 496 case ACPI_RESOURCE_TYPE_FIXED_IO: 497 pnpacpi_parse_fixed_port_option(dev, option_flags, 498 &res->data.fixed_io); 499 break; 500 501 case ACPI_RESOURCE_TYPE_VENDOR: 502 case ACPI_RESOURCE_TYPE_END_TAG: 503 break; 504 505 case ACPI_RESOURCE_TYPE_MEMORY24: 506 pnpacpi_parse_mem24_option(dev, option_flags, 507 &res->data.memory24); 508 break; 509 510 case ACPI_RESOURCE_TYPE_MEMORY32: 511 pnpacpi_parse_mem32_option(dev, option_flags, 512 &res->data.memory32); 513 break; 514 515 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: 516 pnpacpi_parse_fixed_mem32_option(dev, option_flags, 517 &res->data.fixed_memory32); 518 break; 519 520 case ACPI_RESOURCE_TYPE_ADDRESS16: 521 case ACPI_RESOURCE_TYPE_ADDRESS32: 522 case ACPI_RESOURCE_TYPE_ADDRESS64: 523 pnpacpi_parse_address_option(dev, option_flags, res); 524 break; 525 526 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: 527 pnpacpi_parse_ext_address_option(dev, option_flags, res); 528 break; 529 530 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 531 pnpacpi_parse_ext_irq_option(dev, option_flags, 532 &res->data.extended_irq); 533 break; 534 535 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: 536 break; 537 538 default: 539 dev_warn(&dev->dev, "unknown resource type %d in _PRS\n", 540 res->type); 541 return AE_ERROR; 542 } 543 544 return AE_OK; 545 } 546 547 int __init pnpacpi_parse_resource_option_data(struct pnp_dev *dev) 548 { 549 struct acpi_device *acpi_dev = dev->data; 550 acpi_handle handle = acpi_dev->handle; 551 acpi_status status; 552 struct acpipnp_parse_option_s parse_data; 553 554 pnp_dbg(&dev->dev, "parse resource options\n"); 555 556 parse_data.dev = dev; 557 parse_data.option_flags = 0; 558 559 status = acpi_walk_resources(handle, METHOD_NAME__PRS, 560 pnpacpi_option_resource, &parse_data); 561 562 if (ACPI_FAILURE(status)) { 563 if (status != AE_NOT_FOUND) 564 dev_err(&dev->dev, "can't evaluate _PRS: %d", status); 565 return -EPERM; 566 } 567 return 0; 568 } 569 570 static int pnpacpi_supported_resource(struct acpi_resource *res) 571 { 572 switch (res->type) { 573 case ACPI_RESOURCE_TYPE_IRQ: 574 case ACPI_RESOURCE_TYPE_DMA: 575 case ACPI_RESOURCE_TYPE_IO: 576 case ACPI_RESOURCE_TYPE_FIXED_IO: 577 case ACPI_RESOURCE_TYPE_MEMORY24: 578 case ACPI_RESOURCE_TYPE_MEMORY32: 579 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: 580 case ACPI_RESOURCE_TYPE_ADDRESS16: 581 case ACPI_RESOURCE_TYPE_ADDRESS32: 582 case ACPI_RESOURCE_TYPE_ADDRESS64: 583 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: 584 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 585 return 1; 586 } 587 return 0; 588 } 589 590 /* 591 * Set resource 592 */ 593 static acpi_status pnpacpi_count_resources(struct acpi_resource *res, 594 void *data) 595 { 596 int *res_cnt = data; 597 598 if (pnpacpi_supported_resource(res)) 599 (*res_cnt)++; 600 return AE_OK; 601 } 602 603 static acpi_status pnpacpi_type_resources(struct acpi_resource *res, void *data) 604 { 605 struct acpi_resource **resource = data; 606 607 if (pnpacpi_supported_resource(res)) { 608 (*resource)->type = res->type; 609 (*resource)->length = sizeof(struct acpi_resource); 610 if (res->type == ACPI_RESOURCE_TYPE_IRQ) 611 (*resource)->data.irq.descriptor_length = 612 res->data.irq.descriptor_length; 613 (*resource)++; 614 } 615 616 return AE_OK; 617 } 618 619 int pnpacpi_build_resource_template(struct pnp_dev *dev, 620 struct acpi_buffer *buffer) 621 { 622 struct acpi_device *acpi_dev = dev->data; 623 acpi_handle handle = acpi_dev->handle; 624 struct acpi_resource *resource; 625 int res_cnt = 0; 626 acpi_status status; 627 628 status = acpi_walk_resources(handle, METHOD_NAME__CRS, 629 pnpacpi_count_resources, &res_cnt); 630 if (ACPI_FAILURE(status)) { 631 dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status); 632 return -EINVAL; 633 } 634 if (!res_cnt) 635 return -EINVAL; 636 buffer->length = sizeof(struct acpi_resource) * (res_cnt + 1) + 1; 637 buffer->pointer = kzalloc(buffer->length - 1, GFP_KERNEL); 638 if (!buffer->pointer) 639 return -ENOMEM; 640 641 resource = (struct acpi_resource *)buffer->pointer; 642 status = acpi_walk_resources(handle, METHOD_NAME__CRS, 643 pnpacpi_type_resources, &resource); 644 if (ACPI_FAILURE(status)) { 645 kfree(buffer->pointer); 646 dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status); 647 return -EINVAL; 648 } 649 /* resource will pointer the end resource now */ 650 resource->type = ACPI_RESOURCE_TYPE_END_TAG; 651 resource->length = sizeof(struct acpi_resource); 652 653 return 0; 654 } 655 656 static void pnpacpi_encode_irq(struct pnp_dev *dev, 657 struct acpi_resource *resource, 658 struct resource *p) 659 { 660 struct acpi_resource_irq *irq = &resource->data.irq; 661 u8 triggering, polarity, shareable; 662 663 if (!pnp_resource_enabled(p)) { 664 irq->interrupt_count = 0; 665 pnp_dbg(&dev->dev, " encode irq (%s)\n", 666 p ? "disabled" : "missing"); 667 return; 668 } 669 670 decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable); 671 irq->triggering = triggering; 672 irq->polarity = polarity; 673 irq->sharable = shareable; 674 irq->interrupt_count = 1; 675 irq->interrupts[0] = p->start; 676 677 pnp_dbg(&dev->dev, " encode irq %d %s %s %s (%d-byte descriptor)\n", 678 (int) p->start, 679 triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge", 680 polarity == ACPI_ACTIVE_LOW ? "low" : "high", 681 irq->sharable == ACPI_SHARED ? "shared" : "exclusive", 682 irq->descriptor_length); 683 } 684 685 static void pnpacpi_encode_ext_irq(struct pnp_dev *dev, 686 struct acpi_resource *resource, 687 struct resource *p) 688 { 689 struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq; 690 u8 triggering, polarity, shareable; 691 692 if (!pnp_resource_enabled(p)) { 693 extended_irq->interrupt_count = 0; 694 pnp_dbg(&dev->dev, " encode extended irq (%s)\n", 695 p ? "disabled" : "missing"); 696 return; 697 } 698 699 decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable); 700 extended_irq->producer_consumer = ACPI_CONSUMER; 701 extended_irq->triggering = triggering; 702 extended_irq->polarity = polarity; 703 extended_irq->sharable = shareable; 704 extended_irq->interrupt_count = 1; 705 extended_irq->interrupts[0] = p->start; 706 707 pnp_dbg(&dev->dev, " encode irq %d %s %s %s\n", (int) p->start, 708 triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge", 709 polarity == ACPI_ACTIVE_LOW ? "low" : "high", 710 extended_irq->sharable == ACPI_SHARED ? "shared" : "exclusive"); 711 } 712 713 static void pnpacpi_encode_dma(struct pnp_dev *dev, 714 struct acpi_resource *resource, 715 struct resource *p) 716 { 717 struct acpi_resource_dma *dma = &resource->data.dma; 718 719 if (!pnp_resource_enabled(p)) { 720 dma->channel_count = 0; 721 pnp_dbg(&dev->dev, " encode dma (%s)\n", 722 p ? "disabled" : "missing"); 723 return; 724 } 725 726 /* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */ 727 switch (p->flags & IORESOURCE_DMA_SPEED_MASK) { 728 case IORESOURCE_DMA_TYPEA: 729 dma->type = ACPI_TYPE_A; 730 break; 731 case IORESOURCE_DMA_TYPEB: 732 dma->type = ACPI_TYPE_B; 733 break; 734 case IORESOURCE_DMA_TYPEF: 735 dma->type = ACPI_TYPE_F; 736 break; 737 default: 738 dma->type = ACPI_COMPATIBILITY; 739 } 740 741 switch (p->flags & IORESOURCE_DMA_TYPE_MASK) { 742 case IORESOURCE_DMA_8BIT: 743 dma->transfer = ACPI_TRANSFER_8; 744 break; 745 case IORESOURCE_DMA_8AND16BIT: 746 dma->transfer = ACPI_TRANSFER_8_16; 747 break; 748 default: 749 dma->transfer = ACPI_TRANSFER_16; 750 } 751 752 dma->bus_master = !!(p->flags & IORESOURCE_DMA_MASTER); 753 dma->channel_count = 1; 754 dma->channels[0] = p->start; 755 756 pnp_dbg(&dev->dev, " encode dma %d " 757 "type %#x transfer %#x master %d\n", 758 (int) p->start, dma->type, dma->transfer, dma->bus_master); 759 } 760 761 static void pnpacpi_encode_io(struct pnp_dev *dev, 762 struct acpi_resource *resource, 763 struct resource *p) 764 { 765 struct acpi_resource_io *io = &resource->data.io; 766 767 if (pnp_resource_enabled(p)) { 768 /* Note: pnp_assign_port copies pnp_port->flags into p->flags */ 769 io->io_decode = (p->flags & IORESOURCE_IO_16BIT_ADDR) ? 770 ACPI_DECODE_16 : ACPI_DECODE_10; 771 io->minimum = p->start; 772 io->maximum = p->end; 773 io->alignment = 0; /* Correct? */ 774 io->address_length = resource_size(p); 775 } else { 776 io->minimum = 0; 777 io->address_length = 0; 778 } 779 780 pnp_dbg(&dev->dev, " encode io %#x-%#x decode %#x\n", io->minimum, 781 io->minimum + io->address_length - 1, io->io_decode); 782 } 783 784 static void pnpacpi_encode_fixed_io(struct pnp_dev *dev, 785 struct acpi_resource *resource, 786 struct resource *p) 787 { 788 struct acpi_resource_fixed_io *fixed_io = &resource->data.fixed_io; 789 790 if (pnp_resource_enabled(p)) { 791 fixed_io->address = p->start; 792 fixed_io->address_length = resource_size(p); 793 } else { 794 fixed_io->address = 0; 795 fixed_io->address_length = 0; 796 } 797 798 pnp_dbg(&dev->dev, " encode fixed_io %#x-%#x\n", fixed_io->address, 799 fixed_io->address + fixed_io->address_length - 1); 800 } 801 802 static void pnpacpi_encode_mem24(struct pnp_dev *dev, 803 struct acpi_resource *resource, 804 struct resource *p) 805 { 806 struct acpi_resource_memory24 *memory24 = &resource->data.memory24; 807 808 if (pnp_resource_enabled(p)) { 809 /* Note: pnp_assign_mem copies pnp_mem->flags into p->flags */ 810 memory24->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ? 811 ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY; 812 memory24->minimum = p->start; 813 memory24->maximum = p->end; 814 memory24->alignment = 0; 815 memory24->address_length = resource_size(p); 816 } else { 817 memory24->minimum = 0; 818 memory24->address_length = 0; 819 } 820 821 pnp_dbg(&dev->dev, " encode mem24 %#x-%#x write_protect %#x\n", 822 memory24->minimum, 823 memory24->minimum + memory24->address_length - 1, 824 memory24->write_protect); 825 } 826 827 static void pnpacpi_encode_mem32(struct pnp_dev *dev, 828 struct acpi_resource *resource, 829 struct resource *p) 830 { 831 struct acpi_resource_memory32 *memory32 = &resource->data.memory32; 832 833 if (pnp_resource_enabled(p)) { 834 memory32->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ? 835 ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY; 836 memory32->minimum = p->start; 837 memory32->maximum = p->end; 838 memory32->alignment = 0; 839 memory32->address_length = resource_size(p); 840 } else { 841 memory32->minimum = 0; 842 memory32->alignment = 0; 843 } 844 845 pnp_dbg(&dev->dev, " encode mem32 %#x-%#x write_protect %#x\n", 846 memory32->minimum, 847 memory32->minimum + memory32->address_length - 1, 848 memory32->write_protect); 849 } 850 851 static void pnpacpi_encode_fixed_mem32(struct pnp_dev *dev, 852 struct acpi_resource *resource, 853 struct resource *p) 854 { 855 struct acpi_resource_fixed_memory32 *fixed_memory32 = &resource->data.fixed_memory32; 856 857 if (pnp_resource_enabled(p)) { 858 fixed_memory32->write_protect = 859 p->flags & IORESOURCE_MEM_WRITEABLE ? 860 ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY; 861 fixed_memory32->address = p->start; 862 fixed_memory32->address_length = resource_size(p); 863 } else { 864 fixed_memory32->address = 0; 865 fixed_memory32->address_length = 0; 866 } 867 868 pnp_dbg(&dev->dev, " encode fixed_mem32 %#x-%#x write_protect %#x\n", 869 fixed_memory32->address, 870 fixed_memory32->address + fixed_memory32->address_length - 1, 871 fixed_memory32->write_protect); 872 } 873 874 int pnpacpi_encode_resources(struct pnp_dev *dev, struct acpi_buffer *buffer) 875 { 876 int i = 0; 877 /* pnpacpi_build_resource_template allocates extra mem */ 878 int res_cnt = (buffer->length - 1) / sizeof(struct acpi_resource) - 1; 879 struct acpi_resource *resource = buffer->pointer; 880 unsigned int port = 0, irq = 0, dma = 0, mem = 0; 881 882 pnp_dbg(&dev->dev, "encode %d resources\n", res_cnt); 883 while (i < res_cnt) { 884 switch (resource->type) { 885 case ACPI_RESOURCE_TYPE_IRQ: 886 pnpacpi_encode_irq(dev, resource, 887 pnp_get_resource(dev, IORESOURCE_IRQ, irq)); 888 irq++; 889 break; 890 891 case ACPI_RESOURCE_TYPE_DMA: 892 pnpacpi_encode_dma(dev, resource, 893 pnp_get_resource(dev, IORESOURCE_DMA, dma)); 894 dma++; 895 break; 896 case ACPI_RESOURCE_TYPE_IO: 897 pnpacpi_encode_io(dev, resource, 898 pnp_get_resource(dev, IORESOURCE_IO, port)); 899 port++; 900 break; 901 case ACPI_RESOURCE_TYPE_FIXED_IO: 902 pnpacpi_encode_fixed_io(dev, resource, 903 pnp_get_resource(dev, IORESOURCE_IO, port)); 904 port++; 905 break; 906 case ACPI_RESOURCE_TYPE_MEMORY24: 907 pnpacpi_encode_mem24(dev, resource, 908 pnp_get_resource(dev, IORESOURCE_MEM, mem)); 909 mem++; 910 break; 911 case ACPI_RESOURCE_TYPE_MEMORY32: 912 pnpacpi_encode_mem32(dev, resource, 913 pnp_get_resource(dev, IORESOURCE_MEM, mem)); 914 mem++; 915 break; 916 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: 917 pnpacpi_encode_fixed_mem32(dev, resource, 918 pnp_get_resource(dev, IORESOURCE_MEM, mem)); 919 mem++; 920 break; 921 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 922 pnpacpi_encode_ext_irq(dev, resource, 923 pnp_get_resource(dev, IORESOURCE_IRQ, irq)); 924 irq++; 925 break; 926 case ACPI_RESOURCE_TYPE_START_DEPENDENT: 927 case ACPI_RESOURCE_TYPE_END_DEPENDENT: 928 case ACPI_RESOURCE_TYPE_VENDOR: 929 case ACPI_RESOURCE_TYPE_END_TAG: 930 case ACPI_RESOURCE_TYPE_ADDRESS16: 931 case ACPI_RESOURCE_TYPE_ADDRESS32: 932 case ACPI_RESOURCE_TYPE_ADDRESS64: 933 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: 934 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: 935 default: /* other type */ 936 dev_warn(&dev->dev, "can't encode unknown resource " 937 "type %d\n", resource->type); 938 return -EINVAL; 939 } 940 resource++; 941 i++; 942 } 943 return 0; 944 } 945