git.oblomov.eu Git - linux-2.6/blob - drivers/acpi/resources/rsio.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: rsio - IO and DMA resource descriptors
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2005, R. Byron Moore
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44
  45 #include <acpi/acpi.h>
  46 #include <acpi/acresrc.h>
  47
  48 #define _COMPONENT          ACPI_RESOURCES
  49          ACPI_MODULE_NAME    ("rsio")
  50
  51
  52 /*******************************************************************************
  53  *
  54  * FUNCTION:    acpi_rs_io_resource
  55  *
  56  * PARAMETERS:  byte_stream_buffer      - Pointer to the resource input byte
  57  *                                        stream
  58  *              bytes_consumed          - Pointer to where the number of bytes
  59  *                                        consumed the byte_stream_buffer is
  60  *                                        returned
  61  *              output_buffer           - Pointer to the return data buffer
  62  *              structure_size          - Pointer to where the number of bytes
  63  *                                        in the return data struct is returned
  64  *
  65  * RETURN:      Status
  66  *
  67  * DESCRIPTION: Take the resource byte stream and fill out the appropriate
  68  *              structure pointed to by the output_buffer. Return the
  69  *              number of bytes consumed from the byte stream.
  70  *
  71  ******************************************************************************/
  72
  73 acpi_status
  74 acpi_rs_io_resource (
  75         u8                              *byte_stream_buffer,
  76         acpi_size                       *bytes_consumed,
  77         u8                              **output_buffer,
  78         acpi_size                       *structure_size)
  79 {
  80         u8                              *buffer = byte_stream_buffer;
  81         struct acpi_resource            *output_struct = (void *) *output_buffer;
  82         u16                             temp16 = 0;
  83         u8                              temp8 = 0;
  84         acpi_size                       struct_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_io);
  85
  86
  87         ACPI_FUNCTION_TRACE ("rs_io_resource");
  88
  89
  90         /*
  91          * The number of bytes consumed are Constant
  92          */
  93         *bytes_consumed = 8;
  94
  95         output_struct->id = ACPI_RSTYPE_IO;
  96
  97         /*
  98          * Check Decode
  99          */
 100         buffer += 1;
 101         temp8 = *buffer;
 102
 103         output_struct->data.io.io_decode = temp8 & 0x01;
 104
 105         /*
 106          * Check min_base Address
 107          */
 108         buffer += 1;
 109         ACPI_MOVE_16_TO_16 (&temp16, buffer);
 110
 111         output_struct->data.io.min_base_address = temp16;
 112
 113         /*
 114          * Check max_base Address
 115          */
 116         buffer += 2;
 117         ACPI_MOVE_16_TO_16 (&temp16, buffer);
 118
 119         output_struct->data.io.max_base_address = temp16;
 120
 121         /*
 122          * Check Base alignment
 123          */
 124         buffer += 2;
 125         temp8 = *buffer;
 126
 127         output_struct->data.io.alignment = temp8;
 128
 129         /*
 130          * Check range_length
 131          */
 132         buffer += 1;
 133         temp8 = *buffer;
 134
 135         output_struct->data.io.range_length = temp8;
 136
 137         /*
 138          * Set the Length parameter
 139          */
 140         output_struct->length = (u32) struct_size;
 141
 142         /*
 143          * Return the final size of the structure
 144          */
 145         *structure_size = struct_size;
 146         return_ACPI_STATUS (AE_OK);
 147 }
 148
 149
 150 /*******************************************************************************
 151  *
 152  * FUNCTION:    acpi_rs_fixed_io_resource
 153  *
 154  * PARAMETERS:  byte_stream_buffer      - Pointer to the resource input byte
 155  *                                        stream
 156  *              bytes_consumed          - Pointer to where the number of bytes
 157  *                                        consumed the byte_stream_buffer is
 158  *                                        returned
 159  *              output_buffer           - Pointer to the return data buffer
 160  *              structure_size          - Pointer to where the number of bytes
 161  *                                        in the return data struct is returned
 162  *
 163  * RETURN:      Status
 164  *
 165  * DESCRIPTION: Take the resource byte stream and fill out the appropriate
 166  *              structure pointed to by the output_buffer. Return the
 167  *              number of bytes consumed from the byte stream.
 168  *
 169  ******************************************************************************/
 170
 171 acpi_status
 172 acpi_rs_fixed_io_resource (
 173         u8                              *byte_stream_buffer,
 174         acpi_size                       *bytes_consumed,
 175         u8                              **output_buffer,
 176         acpi_size                       *structure_size)
 177 {
 178         u8                              *buffer = byte_stream_buffer;
 179         struct acpi_resource            *output_struct = (void *) *output_buffer;
 180         u16                             temp16 = 0;
 181         u8                              temp8 = 0;
 182         acpi_size                       struct_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_fixed_io);
 183
 184
 185         ACPI_FUNCTION_TRACE ("rs_fixed_io_resource");
 186
 187
 188         /*
 189          * The number of bytes consumed are Constant
 190          */
 191         *bytes_consumed = 4;
 192
 193         output_struct->id = ACPI_RSTYPE_FIXED_IO;
 194
 195         /*
 196          * Check Range Base Address
 197          */
 198         buffer += 1;
 199         ACPI_MOVE_16_TO_16 (&temp16, buffer);
 200
 201         output_struct->data.fixed_io.base_address = temp16;
 202
 203         /*
 204          * Check range_length
 205          */
 206         buffer += 2;
 207         temp8 = *buffer;
 208
 209         output_struct->data.fixed_io.range_length = temp8;
 210
 211         /*
 212          * Set the Length parameter
 213          */
 214         output_struct->length = (u32) struct_size;
 215
 216         /*
 217          * Return the final size of the structure
 218          */
 219         *structure_size = struct_size;
 220         return_ACPI_STATUS (AE_OK);
 221 }
 222
 223
 224 /*******************************************************************************
 225  *
 226  * FUNCTION:    acpi_rs_io_stream
 227  *
 228  * PARAMETERS:  linked_list             - Pointer to the resource linked list
 229  *              output_buffer           - Pointer to the user's return buffer
 230  *              bytes_consumed          - Pointer to where the number of bytes
 231  *                                        used in the output_buffer is returned
 232  *
 233  * RETURN:      Status
 234  *
 235  * DESCRIPTION: Take the linked list resource structure and fills in the
 236  *              the appropriate bytes in a byte stream
 237  *
 238  ******************************************************************************/
 239
 240 acpi_status
 241 acpi_rs_io_stream (
 242         struct acpi_resource            *linked_list,
 243         u8                              **output_buffer,
 244         acpi_size                       *bytes_consumed)
 245 {
 246         u8                              *buffer = *output_buffer;
 247         u16                             temp16 = 0;
 248         u8                              temp8 = 0;
 249
 250
 251         ACPI_FUNCTION_TRACE ("rs_io_stream");
 252
 253
 254         /*
 255          * The descriptor field is static
 256          */
 257         *buffer = 0x47;
 258         buffer += 1;
 259
 260         /*
 261          * Io Information Byte
 262          */
 263         temp8 = (u8) (linked_list->data.io.io_decode & 0x01);
 264
 265         *buffer = temp8;
 266         buffer += 1;
 267
 268         /*
 269          * Set the Range minimum base address
 270          */
 271         temp16 = (u16) linked_list->data.io.min_base_address;
 272
 273         ACPI_MOVE_16_TO_16 (buffer, &temp16);
 274         buffer += 2;
 275
 276         /*
 277          * Set the Range maximum base address
 278          */
 279         temp16 = (u16) linked_list->data.io.max_base_address;
 280
 281         ACPI_MOVE_16_TO_16 (buffer, &temp16);
 282         buffer += 2;
 283
 284         /*
 285          * Set the base alignment
 286          */
 287         temp8 = (u8) linked_list->data.io.alignment;
 288
 289         *buffer = temp8;
 290         buffer += 1;
 291
 292         /*
 293          * Set the range length
 294          */
 295         temp8 = (u8) linked_list->data.io.range_length;
 296
 297         *buffer = temp8;
 298         buffer += 1;
 299
 300         /*
 301          * Return the number of bytes consumed in this operation
 302          */
 303         *bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
 304         return_ACPI_STATUS (AE_OK);
 305 }
 306
 307
 308 /*******************************************************************************
 309  *
 310  * FUNCTION:    acpi_rs_fixed_io_stream
 311  *
 312  * PARAMETERS:  linked_list             - Pointer to the resource linked list
 313  *              output_buffer           - Pointer to the user's return buffer
 314  *              bytes_consumed          - Pointer to where the number of bytes
 315  *                                        used in the output_buffer is returned
 316  *
 317  * RETURN:      Status
 318  *
 319  * DESCRIPTION: Take the linked list resource structure and fills in the
 320  *              the appropriate bytes in a byte stream
 321  *
 322  ******************************************************************************/
 323
 324 acpi_status
 325 acpi_rs_fixed_io_stream (
 326         struct acpi_resource            *linked_list,
 327         u8                              **output_buffer,
 328         acpi_size                       *bytes_consumed)
 329 {
 330         u8                              *buffer = *output_buffer;
 331         u16                             temp16 = 0;
 332         u8                              temp8 = 0;
 333
 334
 335         ACPI_FUNCTION_TRACE ("rs_fixed_io_stream");
 336
 337
 338         /*
 339          * The descriptor field is static
 340          */
 341         *buffer = 0x4B;
 342
 343         buffer += 1;
 344
 345         /*
 346          * Set the Range base address
 347          */
 348         temp16 = (u16) linked_list->data.fixed_io.base_address;
 349
 350         ACPI_MOVE_16_TO_16 (buffer, &temp16);
 351         buffer += 2;
 352
 353         /*
 354          * Set the range length
 355          */
 356         temp8 = (u8) linked_list->data.fixed_io.range_length;
 357
 358         *buffer = temp8;
 359         buffer += 1;
 360
 361         /*
 362          * Return the number of bytes consumed in this operation
 363          */
 364         *bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
 365         return_ACPI_STATUS (AE_OK);
 366 }
 367
 368
 369 /*******************************************************************************
 370  *
 371  * FUNCTION:    acpi_rs_dma_resource
 372  *
 373  * PARAMETERS:  byte_stream_buffer      - Pointer to the resource input byte
 374  *                                        stream
 375  *              bytes_consumed          - Pointer to where the number of bytes
 376  *                                        consumed the byte_stream_buffer is
 377  *                                        returned
 378  *              output_buffer           - Pointer to the return data buffer
 379  *              structure_size          - Pointer to where the number of bytes
 380  *                                        in the return data struct is returned
 381  *
 382  * RETURN:      Status
 383  *
 384  * DESCRIPTION: Take the resource byte stream and fill out the appropriate
 385  *              structure pointed to by the output_buffer. Return the
 386  *              number of bytes consumed from the byte stream.
 387  *
 388  ******************************************************************************/
 389
 390 acpi_status
 391 acpi_rs_dma_resource (
 392         u8                              *byte_stream_buffer,
 393         acpi_size                       *bytes_consumed,
 394         u8                              **output_buffer,
 395         acpi_size                       *structure_size)
 396 {
 397         u8                              *buffer = byte_stream_buffer;
 398         struct acpi_resource            *output_struct = (void *) *output_buffer;
 399         u8                              temp8 = 0;
 400         u8                              index;
 401         u8                              i;
 402         acpi_size                       struct_size = ACPI_SIZEOF_RESOURCE (struct acpi_resource_dma);
 403
 404
 405         ACPI_FUNCTION_TRACE ("rs_dma_resource");
 406
 407
 408         /*
 409          * The number of bytes consumed are Constant
 410          */
 411         *bytes_consumed = 3;
 412         output_struct->id = ACPI_RSTYPE_DMA;
 413
 414         /*
 415          * Point to the 8-bits of Byte 1
 416          */
 417         buffer += 1;
 418         temp8 = *buffer;
 419
 420         /* Decode the DMA channel bits */
 421
 422         for (i = 0, index = 0; index < 8; index++) {
 423                 if ((temp8 >> index) & 0x01) {
 424                         output_struct->data.dma.channels[i] = index;
 425                         i++;
 426                 }
 427         }
 428
 429         /* Zero DMA channels is valid */
 430
 431         output_struct->data.dma.number_of_channels = i;
 432         if (i > 0) {
 433                 /*
 434                  * Calculate the structure size based upon the number of interrupts
 435                  */
 436                 struct_size += ((acpi_size) i - 1) * 4;
 437         }
 438
 439         /*
 440          * Point to Byte 2
 441          */
 442         buffer += 1;
 443         temp8 = *buffer;
 444
 445         /*
 446          * Check for transfer preference (Bits[1:0])
 447          */
 448         output_struct->data.dma.transfer = temp8 & 0x03;
 449
 450         if (0x03 == output_struct->data.dma.transfer) {
 451                 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid DMA.Transfer preference (3)\n"));
 452                 return_ACPI_STATUS (AE_BAD_DATA);
 453         }
 454
 455         /*
 456          * Get bus master preference (Bit[2])
 457          */
 458         output_struct->data.dma.bus_master = (temp8 >> 2) & 0x01;
 459
 460         /*
 461          * Get channel speed support (Bits[6:5])
 462          */
 463         output_struct->data.dma.type = (temp8 >> 5) & 0x03;
 464
 465         /*
 466          * Set the Length parameter
 467          */
 468         output_struct->length = (u32) struct_size;
 469
 470         /*
 471          * Return the final size of the structure
 472          */
 473         *structure_size = struct_size;
 474         return_ACPI_STATUS (AE_OK);
 475 }
 476
 477
 478 /*******************************************************************************
 479  *
 480  * FUNCTION:    acpi_rs_dma_stream
 481  *
 482  * PARAMETERS:  linked_list             - Pointer to the resource linked list
 483  *              output_buffer           - Pointer to the user's return buffer
 484  *              bytes_consumed          - Pointer to where the number of bytes
 485  *                                        used in the output_buffer is returned
 486  *
 487  * RETURN:      Status
 488  *
 489  * DESCRIPTION: Take the linked list resource structure and fills in the
 490  *              the appropriate bytes in a byte stream
 491  *
 492  ******************************************************************************/
 493
 494 acpi_status
 495 acpi_rs_dma_stream (
 496         struct acpi_resource            *linked_list,
 497         u8                              **output_buffer,
 498         acpi_size                       *bytes_consumed)
 499 {
 500         u8                              *buffer = *output_buffer;
 501         u16                             temp16 = 0;
 502         u8                              temp8 = 0;
 503         u8                              index;
 504
 505
 506         ACPI_FUNCTION_TRACE ("rs_dma_stream");
 507
 508
 509         /*
 510          * The descriptor field is static
 511          */
 512         *buffer = 0x2A;
 513         buffer += 1;
 514         temp8 = 0;
 515
 516         /*
 517          * Loop through all of the Channels and set the mask bits
 518          */
 519         for (index = 0;
 520                  index < linked_list->data.dma.number_of_channels;
 521                  index++) {
 522                 temp16 = (u16) linked_list->data.dma.channels[index];
 523                 temp8 |= 0x1 << temp16;
 524         }
 525
 526         *buffer = temp8;
 527         buffer += 1;
 528
 529         /*
 530          * Set the DMA Info
 531          */
 532         temp8 = (u8) ((linked_list->data.dma.type & 0x03) << 5);
 533         temp8 |= ((linked_list->data.dma.bus_master & 0x01) << 2);
 534         temp8 |= (linked_list->data.dma.transfer & 0x03);
 535
 536         *buffer = temp8;
 537         buffer += 1;
 538
 539         /*
 540          * Return the number of bytes consumed in this operation
 541          */
 542         *bytes_consumed = ACPI_PTR_DIFF (buffer, *output_buffer);
 543         return_ACPI_STATUS (AE_OK);
 544 }
 545