kernel/drivers/acpi/acpica/dbconvert.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: dbconvert - debugger miscellaneous conversion routines
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2015, Intel Corp.
   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 #include <acpi/acpi.h>
  45 #include "accommon.h"
  46 #include "acdebug.h"
  47
  48 #define _COMPONENT          ACPI_CA_DEBUGGER
  49 ACPI_MODULE_NAME("dbconvert")
  50
  51 #define DB_DEFAULT_PKG_ELEMENTS     33
  52 /*******************************************************************************
  53  *
  54  * FUNCTION:    acpi_db_hex_char_to_value
  55  *
  56  * PARAMETERS:  hex_char            - Ascii Hex digit, 0-9|a-f|A-F
  57  *              return_value        - Where the converted value is returned
  58  *
  59  * RETURN:      Status
  60  *
  61  * DESCRIPTION: Convert a single hex character to a 4-bit number (0-16).
  62  *
  63  ******************************************************************************/
  64 acpi_status acpi_db_hex_char_to_value(int hex_char, u8 *return_value)
  65 {
  66         u8 value;
  67
  68         /* Digit must be ascii [0-9a-fA-F] */
  69
  70         if (!isxdigit(hex_char)) {
  71                 return (AE_BAD_HEX_CONSTANT);
  72         }
  73
  74         if (hex_char <= 0x39) {
  75                 value = (u8)(hex_char - 0x30);
  76         } else {
  77                 value = (u8)(toupper(hex_char) - 0x37);
  78         }
  79
  80         *return_value = value;
  81         return (AE_OK);
  82 }
  83
  84 /*******************************************************************************
  85  *
  86  * FUNCTION:    acpi_db_hex_byte_to_binary
  87  *
  88  * PARAMETERS:  hex_byte            - Double hex digit (0x00 - 0xFF) in format:
  89  *                                    hi_byte then lo_byte.
  90  *              return_value        - Where the converted value is returned
  91  *
  92  * RETURN:      Status
  93  *
  94  * DESCRIPTION: Convert two hex characters to an 8 bit number (0 - 255).
  95  *
  96  ******************************************************************************/
  97
  98 static acpi_status acpi_db_hex_byte_to_binary(char *hex_byte, u8 *return_value)
  99 {
 100         u8 local0;
 101         u8 local1;
 102         acpi_status status;
 103
 104         /* High byte */
 105
 106         status = acpi_db_hex_char_to_value(hex_byte[0], &local0);
 107         if (ACPI_FAILURE(status)) {
 108                 return (status);
 109         }
 110
 111         /* Low byte */
 112
 113         status = acpi_db_hex_char_to_value(hex_byte[1], &local1);
 114         if (ACPI_FAILURE(status)) {
 115                 return (status);
 116         }
 117
 118         *return_value = (u8)((local0 << 4) | local1);
 119         return (AE_OK);
 120 }
 121
 122 /*******************************************************************************
 123  *
 124  * FUNCTION:    acpi_db_convert_to_buffer
 125  *
 126  * PARAMETERS:  string              - Input string to be converted
 127  *              object              - Where the buffer object is returned
 128  *
 129  * RETURN:      Status
 130  *
 131  * DESCRIPTION: Convert a string to a buffer object. String is treated a list
 132  *              of buffer elements, each separated by a space or comma.
 133  *
 134  ******************************************************************************/
 135
 136 static acpi_status
 137 acpi_db_convert_to_buffer(char *string, union acpi_object *object)
 138 {
 139         u32 i;
 140         u32 j;
 141         u32 length;
 142         u8 *buffer;
 143         acpi_status status;
 144
 145         /* Generate the final buffer length */
 146
 147         for (i = 0, length = 0; string[i];) {
 148                 i += 2;
 149                 length++;
 150
 151                 while (string[i] && ((string[i] == ',') || (string[i] == ' '))) {
 152                         i++;
 153                 }
 154         }
 155
 156         buffer = ACPI_ALLOCATE(length);
 157         if (!buffer) {
 158                 return (AE_NO_MEMORY);
 159         }
 160
 161         /* Convert the command line bytes to the buffer */
 162
 163         for (i = 0, j = 0; string[i];) {
 164                 status = acpi_db_hex_byte_to_binary(&string[i], &buffer[j]);
 165                 if (ACPI_FAILURE(status)) {
 166                         ACPI_FREE(buffer);
 167                         return (status);
 168                 }
 169
 170                 j++;
 171                 i += 2;
 172                 while (string[i] && ((string[i] == ',') || (string[i] == ' '))) {
 173                         i++;
 174                 }
 175         }
 176
 177         object->type = ACPI_TYPE_BUFFER;
 178         object->buffer.pointer = buffer;
 179         object->buffer.length = length;
 180         return (AE_OK);
 181 }
 182
 183 /*******************************************************************************
 184  *
 185  * FUNCTION:    acpi_db_convert_to_package
 186  *
 187  * PARAMETERS:  string              - Input string to be converted
 188  *              object              - Where the package object is returned
 189  *
 190  * RETURN:      Status
 191  *
 192  * DESCRIPTION: Convert a string to a package object. Handles nested packages
 193  *              via recursion with acpi_db_convert_to_object.
 194  *
 195  ******************************************************************************/
 196
 197 acpi_status acpi_db_convert_to_package(char *string, union acpi_object * object)
 198 {
 199         char *this;
 200         char *next;
 201         u32 i;
 202         acpi_object_type type;
 203         union acpi_object *elements;
 204         acpi_status status;
 205
 206         elements =
 207             ACPI_ALLOCATE_ZEROED(DB_DEFAULT_PKG_ELEMENTS *
 208                                  sizeof(union acpi_object));
 209
 210         this = string;
 211         for (i = 0; i < (DB_DEFAULT_PKG_ELEMENTS - 1); i++) {
 212                 this = acpi_db_get_next_token(this, &next, &type);
 213                 if (!this) {
 214                         break;
 215                 }
 216
 217                 /* Recursive call to convert each package element */
 218
 219                 status = acpi_db_convert_to_object(type, this, &elements[i]);
 220                 if (ACPI_FAILURE(status)) {
 221                         acpi_db_delete_objects(i + 1, elements);
 222                         ACPI_FREE(elements);
 223                         return (status);
 224                 }
 225
 226                 this = next;
 227         }
 228
 229         object->type = ACPI_TYPE_PACKAGE;
 230         object->package.count = i;
 231         object->package.elements = elements;
 232         return (AE_OK);
 233 }
 234
 235 /*******************************************************************************
 236  *
 237  * FUNCTION:    acpi_db_convert_to_object
 238  *
 239  * PARAMETERS:  type                - Object type as determined by parser
 240  *              string              - Input string to be converted
 241  *              object              - Where the new object is returned
 242  *
 243  * RETURN:      Status
 244  *
 245  * DESCRIPTION: Convert a typed and tokenized string to an union acpi_object. Typing:
 246  *              1) String objects were surrounded by quotes.
 247  *              2) Buffer objects were surrounded by parentheses.
 248  *              3) Package objects were surrounded by brackets "[]".
 249  *              4) All standalone tokens are treated as integers.
 250  *
 251  ******************************************************************************/
 252
 253 acpi_status
 254 acpi_db_convert_to_object(acpi_object_type type,
 255                           char *string, union acpi_object * object)
 256 {
 257         acpi_status status = AE_OK;
 258
 259         switch (type) {
 260         case ACPI_TYPE_STRING:
 261
 262                 object->type = ACPI_TYPE_STRING;
 263                 object->string.pointer = string;
 264                 object->string.length = (u32)strlen(string);
 265                 break;
 266
 267         case ACPI_TYPE_BUFFER:
 268
 269                 status = acpi_db_convert_to_buffer(string, object);
 270                 break;
 271
 272         case ACPI_TYPE_PACKAGE:
 273
 274                 status = acpi_db_convert_to_package(string, object);
 275                 break;
 276
 277         default:
 278
 279                 object->type = ACPI_TYPE_INTEGER;
 280                 status = acpi_ut_strtoul64(string, 16, &object->integer.value);
 281                 break;
 282         }
 283
 284         return (status);
 285 }
 286
 287 /*******************************************************************************
 288  *
 289  * FUNCTION:    acpi_db_encode_pld_buffer
 290  *
 291  * PARAMETERS:  pld_info            - _PLD buffer struct (Using local struct)
 292  *
 293  * RETURN:      Encode _PLD buffer suitable for return value from _PLD
 294  *
 295  * DESCRIPTION: Bit-packs a _PLD buffer struct. Used to test the _PLD macros
 296  *
 297  ******************************************************************************/
 298
 299 u8 *acpi_db_encode_pld_buffer(struct acpi_pld_info *pld_info)
 300 {
 301         u32 *buffer;
 302         u32 dword;
 303
 304         buffer = ACPI_ALLOCATE_ZEROED(ACPI_PLD_BUFFER_SIZE);
 305         if (!buffer) {
 306                 return (NULL);
 307         }
 308
 309         /* First 32 bits */
 310
 311         dword = 0;
 312         ACPI_PLD_SET_REVISION(&dword, pld_info->revision);
 313         ACPI_PLD_SET_IGNORE_COLOR(&dword, pld_info->ignore_color);
 314         ACPI_PLD_SET_RED(&dword, pld_info->red);
 315         ACPI_PLD_SET_GREEN(&dword, pld_info->green);
 316         ACPI_PLD_SET_BLUE(&dword, pld_info->blue);
 317         ACPI_MOVE_32_TO_32(&buffer[0], &dword);
 318
 319         /* Second 32 bits */
 320
 321         dword = 0;
 322         ACPI_PLD_SET_WIDTH(&dword, pld_info->width);
 323         ACPI_PLD_SET_HEIGHT(&dword, pld_info->height);
 324         ACPI_MOVE_32_TO_32(&buffer[1], &dword);
 325
 326         /* Third 32 bits */
 327
 328         dword = 0;
 329         ACPI_PLD_SET_USER_VISIBLE(&dword, pld_info->user_visible);
 330         ACPI_PLD_SET_DOCK(&dword, pld_info->dock);
 331         ACPI_PLD_SET_LID(&dword, pld_info->lid);
 332         ACPI_PLD_SET_PANEL(&dword, pld_info->panel);
 333         ACPI_PLD_SET_VERTICAL(&dword, pld_info->vertical_position);
 334         ACPI_PLD_SET_HORIZONTAL(&dword, pld_info->horizontal_position);
 335         ACPI_PLD_SET_SHAPE(&dword, pld_info->shape);
 336         ACPI_PLD_SET_ORIENTATION(&dword, pld_info->group_orientation);
 337         ACPI_PLD_SET_TOKEN(&dword, pld_info->group_token);
 338         ACPI_PLD_SET_POSITION(&dword, pld_info->group_position);
 339         ACPI_PLD_SET_BAY(&dword, pld_info->bay);
 340         ACPI_MOVE_32_TO_32(&buffer[2], &dword);
 341
 342         /* Fourth 32 bits */
 343
 344         dword = 0;
 345         ACPI_PLD_SET_EJECTABLE(&dword, pld_info->ejectable);
 346         ACPI_PLD_SET_OSPM_EJECT(&dword, pld_info->ospm_eject_required);
 347         ACPI_PLD_SET_CABINET(&dword, pld_info->cabinet_number);
 348         ACPI_PLD_SET_CARD_CAGE(&dword, pld_info->card_cage_number);
 349         ACPI_PLD_SET_REFERENCE(&dword, pld_info->reference);
 350         ACPI_PLD_SET_ROTATION(&dword, pld_info->rotation);
 351         ACPI_PLD_SET_ORDER(&dword, pld_info->order);
 352         ACPI_MOVE_32_TO_32(&buffer[3], &dword);
 353
 354         if (pld_info->revision >= 2) {
 355
 356                 /* Fifth 32 bits */
 357
 358                 dword = 0;
 359                 ACPI_PLD_SET_VERT_OFFSET(&dword, pld_info->vertical_offset);
 360                 ACPI_PLD_SET_HORIZ_OFFSET(&dword, pld_info->horizontal_offset);
 361                 ACPI_MOVE_32_TO_32(&buffer[4], &dword);
 362         }
 363
 364         return (ACPI_CAST_PTR(u8, buffer));
 365 }
 366
 367 /*******************************************************************************
 368  *
 369  * FUNCTION:    acpi_db_dump_pld_buffer
 370  *
 371  * PARAMETERS:  obj_desc            - Object returned from _PLD method
 372  *
 373  * RETURN:      None.
 374  *
 375  * DESCRIPTION: Dumps formatted contents of a _PLD return buffer.
 376  *
 377  ******************************************************************************/
 378
 379 #define ACPI_PLD_OUTPUT     "%20s : %-6X\n"
 380
 381 void acpi_db_dump_pld_buffer(union acpi_object *obj_desc)
 382 {
 383         union acpi_object *buffer_desc;
 384         struct acpi_pld_info *pld_info;
 385         u8 *new_buffer;
 386         acpi_status status;
 387
 388         /* Object must be of type Package with at least one Buffer element */
 389
 390         if (obj_desc->type != ACPI_TYPE_PACKAGE) {
 391                 return;
 392         }
 393
 394         buffer_desc = &obj_desc->package.elements[0];
 395         if (buffer_desc->type != ACPI_TYPE_BUFFER) {
 396                 return;
 397         }
 398
 399         /* Convert _PLD buffer to local _PLD struct */
 400
 401         status = acpi_decode_pld_buffer(buffer_desc->buffer.pointer,
 402                                         buffer_desc->buffer.length, &pld_info);
 403         if (ACPI_FAILURE(status)) {
 404                 return;
 405         }
 406
 407         /* Encode local _PLD struct back to a _PLD buffer */
 408
 409         new_buffer = acpi_db_encode_pld_buffer(pld_info);
 410         if (!new_buffer) {
 411                 return;
 412         }
 413
 414         /* The two bit-packed buffers should match */
 415
 416         if (memcmp(new_buffer, buffer_desc->buffer.pointer,
 417                    buffer_desc->buffer.length)) {
 418                 acpi_os_printf
 419                     ("Converted _PLD buffer does not compare. New:\n");
 420
 421                 acpi_ut_dump_buffer(new_buffer,
 422                                     buffer_desc->buffer.length, DB_BYTE_DISPLAY,
 423                                     0);
 424         }
 425
 426         /* First 32-bit dword */
 427
 428         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Revision", pld_info->revision);
 429         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_IgnoreColor",
 430                        pld_info->ignore_color);
 431         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Red", pld_info->red);
 432         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Green", pld_info->green);
 433         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Blue", pld_info->blue);
 434
 435         /* Second 32-bit dword */
 436
 437         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Width", pld_info->width);
 438         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Height", pld_info->height);
 439
 440         /* Third 32-bit dword */
 441
 442         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_UserVisible",
 443                        pld_info->user_visible);
 444         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Dock", pld_info->dock);
 445         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Lid", pld_info->lid);
 446         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Panel", pld_info->panel);
 447         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_VerticalPosition",
 448                        pld_info->vertical_position);
 449         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_HorizontalPosition",
 450                        pld_info->horizontal_position);
 451         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Shape", pld_info->shape);
 452         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_GroupOrientation",
 453                        pld_info->group_orientation);
 454         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_GroupToken",
 455                        pld_info->group_token);
 456         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_GroupPosition",
 457                        pld_info->group_position);
 458         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Bay", pld_info->bay);
 459
 460         /* Fourth 32-bit dword */
 461
 462         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Ejectable", pld_info->ejectable);
 463         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_EjectRequired",
 464                        pld_info->ospm_eject_required);
 465         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_CabinetNumber",
 466                        pld_info->cabinet_number);
 467         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_CardCageNumber",
 468                        pld_info->card_cage_number);
 469         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Reference", pld_info->reference);
 470         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Rotation", pld_info->rotation);
 471         acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_Order", pld_info->order);
 472
 473         /* Fifth 32-bit dword */
 474
 475         if (buffer_desc->buffer.length > 16) {
 476                 acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_VerticalOffset",
 477                                pld_info->vertical_offset);
 478                 acpi_os_printf(ACPI_PLD_OUTPUT, "PLD_HorizontalOffset",
 479                                pld_info->horizontal_offset);
 480         }
 481
 482         ACPI_FREE(pld_info);
 483         ACPI_FREE(new_buffer);
 484 }