git.oblomov.eu Git - linux-2.6/blob - drivers/staging/epl/EplIdentu.c

   1 /****************************************************************************
   2
   3   (c) SYSTEC electronic GmbH, D-07973 Greiz, August-Bebel-Str. 29
   4       www.systec-electronic.com
   5
   6   Project:      openPOWERLINK
   7
   8   Description:  source file for Identu-Module
   9
  10   License:
  11
  12     Redistribution and use in source and binary forms, with or without
  13     modification, are permitted provided that the following conditions
  14     are met:
  15
  16     1. Redistributions of source code must retain the above copyright
  17        notice, this list of conditions and the following disclaimer.
  18
  19     2. Redistributions in binary form must reproduce the above copyright
  20        notice, this list of conditions and the following disclaimer in the
  21        documentation and/or other materials provided with the distribution.
  22
  23     3. Neither the name of SYSTEC electronic GmbH nor the names of its
  24        contributors may be used to endorse or promote products derived
  25        from this software without prior written permission. For written
  26        permission, please contact info@systec-electronic.com.
  27
  28     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  29     "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  30     LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  31     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  32     COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  33     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  34     BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  35     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  36     CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  37     LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  38     ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  39     POSSIBILITY OF SUCH DAMAGE.
  40
  41     Severability Clause:
  42
  43         If a provision of this License is or becomes illegal, invalid or
  44         unenforceable in any jurisdiction, that shall not affect:
  45         1. the validity or enforceability in that jurisdiction of any other
  46            provision of this License; or
  47         2. the validity or enforceability in other jurisdictions of that or
  48            any other provision of this License.
  49
  50   -------------------------------------------------------------------------
  51
  52                 $RCSfile: EplIdentu.c,v $
  53
  54                 $Author: D.Krueger $
  55
  56                 $Revision: 1.8 $  $Date: 2008/11/21 09:00:38 $
  57
  58                 $State: Exp $
  59
  60                 Build Environment:
  61                     GCC V3.4
  62
  63   -------------------------------------------------------------------------
  64
  65   Revision History:
  66
  67   2006/11/15 d.k.:   start of the implementation
  68
  69 ****************************************************************************/
  70
  71 #include "user/EplIdentu.h"
  72 #include "user/EplDlluCal.h"
  73
  74 /***************************************************************************/
  75 /*                                                                         */
  76 /*                                                                         */
  77 /*          G L O B A L   D E F I N I T I O N S                            */
  78 /*                                                                         */
  79 /*                                                                         */
  80 /***************************************************************************/
  81
  82 //---------------------------------------------------------------------------
  83 // const defines
  84 //---------------------------------------------------------------------------
  85
  86 //---------------------------------------------------------------------------
  87 // local types
  88 //---------------------------------------------------------------------------
  89
  90 //---------------------------------------------------------------------------
  91 // modul globale vars
  92 //---------------------------------------------------------------------------
  93
  94 //---------------------------------------------------------------------------
  95 // local function prototypes
  96 //---------------------------------------------------------------------------
  97
  98 /***************************************************************************/
  99 /*                                                                         */
 100 /*                                                                         */
 101 /*          C L A S S  <xxxxx>                                             */
 102 /*                                                                         */
 103 /*                                                                         */
 104 /***************************************************************************/
 105 //
 106 // Description:
 107 //
 108 //
 109 /***************************************************************************/
 110
 111 //=========================================================================//
 112 //                                                                         //
 113 //          P R I V A T E   D E F I N I T I O N S                          //
 114 //                                                                         //
 115 //=========================================================================//
 116
 117 //---------------------------------------------------------------------------
 118 // const defines
 119 //---------------------------------------------------------------------------
 120
 121 //---------------------------------------------------------------------------
 122 // local types
 123 //---------------------------------------------------------------------------
 124
 125 typedef struct {
 126         tEplIdentResponse *m_apIdentResponse[254];      // the IdentResponse are managed dynamically
 127         tEplIdentuCbResponse m_apfnCbResponse[254];
 128
 129 } tEplIdentuInstance;
 130
 131 //---------------------------------------------------------------------------
 132 // local vars
 133 //---------------------------------------------------------------------------
 134
 135 static tEplIdentuInstance EplIdentuInstance_g;
 136
 137 //---------------------------------------------------------------------------
 138 // local function prototypes
 139 //---------------------------------------------------------------------------
 140
 141 static tEplKernel PUBLIC EplIdentuCbIdentResponse(tEplFrameInfo * pFrameInfo_p);
 142
 143 //=========================================================================//
 144 //                                                                         //
 145 //          P U B L I C   F U N C T I O N S                                //
 146 //                                                                         //
 147 //=========================================================================//
 148
 149 //---------------------------------------------------------------------------
 150 //
 151 // Function:    EplIdentuInit
 152 //
 153 // Description: init first instance of the module
 154 //
 155 //
 156 //
 157 // Parameters:
 158 //
 159 //
 160 // Returns:     tEplKernel  = errorcode
 161 //
 162 //
 163 // State:
 164 //
 165 //---------------------------------------------------------------------------
 166
 167 EPLDLLEXPORT tEplKernel PUBLIC EplIdentuInit()
 168 {
 169         tEplKernel Ret;
 170
 171         Ret = EplIdentuAddInstance();
 172
 173         return Ret;
 174 }
 175
 176 //---------------------------------------------------------------------------
 177 //
 178 // Function:    EplIdentuAddInstance
 179 //
 180 // Description: init other instances of the module
 181 //
 182 //
 183 //
 184 // Parameters:
 185 //
 186 //
 187 // Returns:     tEplKernel  = errorcode
 188 //
 189 //
 190 // State:
 191 //
 192 //---------------------------------------------------------------------------
 193
 194 EPLDLLEXPORT tEplKernel PUBLIC EplIdentuAddInstance()
 195 {
 196         tEplKernel Ret;
 197
 198         Ret = kEplSuccessful;
 199
 200         // reset instance structure
 201         EPL_MEMSET(&EplIdentuInstance_g, 0, sizeof(EplIdentuInstance_g));
 202
 203         // register IdentResponse callback function
 204         Ret =
 205             EplDlluCalRegAsndService(kEplDllAsndIdentResponse,
 206                                      EplIdentuCbIdentResponse,
 207                                      kEplDllAsndFilterAny);
 208
 209         return Ret;
 210
 211 }
 212
 213 //---------------------------------------------------------------------------
 214 //
 215 // Function:    EplIdentuDelInstance
 216 //
 217 // Description: delete instance
 218 //
 219 //
 220 //
 221 // Parameters:
 222 //
 223 //
 224 // Returns:     tEplKernel  = errorcode
 225 //
 226 //
 227 // State:
 228 //
 229 //---------------------------------------------------------------------------
 230
 231 EPLDLLEXPORT tEplKernel PUBLIC EplIdentuDelInstance()
 232 {
 233         tEplKernel Ret;
 234
 235         Ret = kEplSuccessful;
 236
 237         // deregister IdentResponse callback function
 238         Ret =
 239             EplDlluCalRegAsndService(kEplDllAsndIdentResponse, NULL,
 240                                      kEplDllAsndFilterNone);
 241
 242         Ret = EplIdentuReset();
 243
 244         return Ret;
 245
 246 }
 247
 248 //---------------------------------------------------------------------------
 249 //
 250 // Function:    EplIdentuReset
 251 //
 252 // Description: resets this instance
 253 //
 254 //
 255 //
 256 // Parameters:
 257 //
 258 //
 259 // Returns:     tEplKernel  = errorcode
 260 //
 261 //
 262 // State:
 263 //
 264 //---------------------------------------------------------------------------
 265
 266 EPLDLLEXPORT tEplKernel PUBLIC EplIdentuReset()
 267 {
 268         tEplKernel Ret;
 269         int iIndex;
 270
 271         Ret = kEplSuccessful;
 272
 273         for (iIndex = 0;
 274              iIndex < tabentries(EplIdentuInstance_g.m_apIdentResponse);
 275              iIndex++) {
 276                 if (EplIdentuInstance_g.m_apIdentResponse[iIndex] != NULL) {    // free memory
 277                         EPL_FREE(EplIdentuInstance_g.m_apIdentResponse[iIndex]);
 278                 }
 279         }
 280
 281         EPL_MEMSET(&EplIdentuInstance_g, 0, sizeof(EplIdentuInstance_g));
 282
 283         return Ret;
 284
 285 }
 286
 287 //---------------------------------------------------------------------------
 288 //
 289 // Function:    EplIdentuGetIdentResponse
 290 //
 291 // Description: returns the IdentResponse for the specified node.
 292 //
 293 // Parameters:  uiNodeId_p                  = IN: node ID
 294 //              ppIdentResponse_p           = OUT: pointer to pointer of IdentResponse
 295 //                                            equals NULL, if no IdentResponse available
 296 //
 297 // Return:      tEplKernel                  = error code
 298 //
 299 // State:       not tested
 300 //
 301 //---------------------------------------------------------------------------
 302
 303 tEplKernel PUBLIC EplIdentuGetIdentResponse(unsigned int uiNodeId_p,
 304                                             tEplIdentResponse **
 305                                             ppIdentResponse_p)
 306 {
 307         tEplKernel Ret;
 308
 309         Ret = kEplSuccessful;
 310
 311         // decrement node ID, because array is zero based
 312         uiNodeId_p--;
 313         if (uiNodeId_p < tabentries(EplIdentuInstance_g.m_apIdentResponse)) {
 314                 *ppIdentResponse_p =
 315                     EplIdentuInstance_g.m_apIdentResponse[uiNodeId_p];
 316         } else {                // invalid node ID specified
 317                 *ppIdentResponse_p = NULL;
 318                 Ret = kEplInvalidNodeId;
 319         }
 320
 321         return Ret;
 322
 323 }
 324
 325 //---------------------------------------------------------------------------
 326 //
 327 // Function:    EplIdentuRequestIdentResponse
 328 //
 329 // Description: returns the IdentResponse for the specified node.
 330 //
 331 // Parameters:  uiNodeId_p                  = IN: node ID
 332 //              pfnCbResponse_p             = IN: function pointer to callback function
 333 //                                            which will be called if IdentResponse is received
 334 //
 335 // Return:      tEplKernel                  = error code
 336 //
 337 // State:       not tested
 338 //
 339 //---------------------------------------------------------------------------
 340
 341 tEplKernel PUBLIC EplIdentuRequestIdentResponse(unsigned int uiNodeId_p,
 342                                                 tEplIdentuCbResponse
 343                                                 pfnCbResponse_p)
 344 {
 345         tEplKernel Ret;
 346
 347         Ret = kEplSuccessful;
 348
 349         // decrement node ID, because array is zero based
 350         uiNodeId_p--;
 351         if (uiNodeId_p < tabentries(EplIdentuInstance_g.m_apfnCbResponse)) {
 352 #if(((EPL_MODULE_INTEGRATION) & (EPL_MODULE_NMT_MN)) != 0)
 353                 if (EplIdentuInstance_g.m_apfnCbResponse[uiNodeId_p] != NULL) { // request already issued (maybe by someone else)
 354                         Ret = kEplInvalidOperation;
 355                 } else {
 356                         EplIdentuInstance_g.m_apfnCbResponse[uiNodeId_p] =
 357                             pfnCbResponse_p;
 358                         Ret =
 359                             EplDlluCalIssueRequest(kEplDllReqServiceIdent,
 360                                                    (uiNodeId_p + 1), 0xFF);
 361                 }
 362 #else
 363                 Ret = kEplInvalidOperation;
 364 #endif
 365         } else {                // invalid node ID specified
 366                 Ret = kEplInvalidNodeId;
 367         }
 368
 369         return Ret;
 370
 371 }
 372
 373 //---------------------------------------------------------------------------
 374 //
 375 // Function:    EplIdentuGetRunningRequests
 376 //
 377 // Description: returns a bit field with the running requests for node-ID 1-32
 378 //              just for debugging purposes
 379 //
 380 //
 381 // Parameters:
 382 //
 383 //
 384 // Returns:     tEplKernel  = errorcode
 385 //
 386 //
 387 // State:
 388 //
 389 //---------------------------------------------------------------------------
 390
 391 EPLDLLEXPORT DWORD PUBLIC EplIdentuGetRunningRequests(void)
 392 {
 393         DWORD dwReqs = 0;
 394         unsigned int uiIndex;
 395
 396         for (uiIndex = 0; uiIndex < 32; uiIndex++) {
 397                 if (EplIdentuInstance_g.m_apfnCbResponse[uiIndex] != NULL) {
 398                         dwReqs |= (1 << uiIndex);
 399                 }
 400         }
 401
 402         return dwReqs;
 403 }
 404
 405 //=========================================================================//
 406 //                                                                         //
 407 //          P R I V A T E   F U N C T I O N S                              //
 408 //                                                                         //
 409 //=========================================================================//
 410
 411 //---------------------------------------------------------------------------
 412 //
 413 // Function:    EplIdentuCbIdentResponse
 414 //
 415 // Description: callback funktion for IdentResponse
 416 //
 417 //
 418 //
 419 // Parameters:  pFrameInfo_p            = Frame with the IdentResponse
 420 //
 421 //
 422 // Returns:     tEplKernel              = error code
 423 //
 424 //
 425 // State:
 426 //
 427 //---------------------------------------------------------------------------
 428
 429 static tEplKernel PUBLIC EplIdentuCbIdentResponse(tEplFrameInfo * pFrameInfo_p)
 430 {
 431         tEplKernel Ret = kEplSuccessful;
 432         unsigned int uiNodeId;
 433         unsigned int uiIndex;
 434         tEplIdentuCbResponse pfnCbResponse;
 435
 436         uiNodeId = AmiGetByteFromLe(&pFrameInfo_p->m_pFrame->m_le_bSrcNodeId);
 437
 438         uiIndex = uiNodeId - 1;
 439
 440         if (uiIndex < tabentries(EplIdentuInstance_g.m_apfnCbResponse)) {
 441                 // memorize pointer to callback function
 442                 pfnCbResponse = EplIdentuInstance_g.m_apfnCbResponse[uiIndex];
 443                 // reset callback function pointer so that caller may issue next request immediately
 444                 EplIdentuInstance_g.m_apfnCbResponse[uiIndex] = NULL;
 445
 446                 if (pFrameInfo_p->m_uiFrameSize < EPL_C_DLL_MINSIZE_IDENTRES) { // IdentResponse not received or it has invalid size
 447                         if (pfnCbResponse == NULL) {    // response was not requested
 448                                 goto Exit;
 449                         }
 450                         Ret = pfnCbResponse(uiNodeId, NULL);
 451                 } else {        // IdentResponse received
 452                         if (EplIdentuInstance_g.m_apIdentResponse[uiIndex] == NULL) {   // memory for IdentResponse must be allocated
 453                                 EplIdentuInstance_g.m_apIdentResponse[uiIndex] =
 454                                     EPL_MALLOC(sizeof(tEplIdentResponse));
 455                                 if (EplIdentuInstance_g.m_apIdentResponse[uiIndex] == NULL) {   // malloc failed
 456                                         if (pfnCbResponse == NULL) {    // response was not requested
 457                                                 goto Exit;
 458                                         }
 459                                         Ret =
 460                                             pfnCbResponse(uiNodeId,
 461                                                           &pFrameInfo_p->
 462                                                           m_pFrame->m_Data.
 463                                                           m_Asnd.m_Payload.
 464                                                           m_IdentResponse);
 465                                         goto Exit;
 466                                 }
 467                         }
 468                         // copy IdentResponse to instance structure
 469                         EPL_MEMCPY(EplIdentuInstance_g.
 470                                    m_apIdentResponse[uiIndex],
 471                                    &pFrameInfo_p->m_pFrame->m_Data.m_Asnd.
 472                                    m_Payload.m_IdentResponse,
 473                                    sizeof(tEplIdentResponse));
 474                         if (pfnCbResponse == NULL) {    // response was not requested
 475                                 goto Exit;
 476                         }
 477                         Ret =
 478                             pfnCbResponse(uiNodeId,
 479                                           EplIdentuInstance_g.
 480                                           m_apIdentResponse[uiIndex]);
 481                 }
 482         }
 483
 484       Exit:
 485         return Ret;
 486 }
 487
 488 // EOF