| 1 | /* |
| 2 | * drivers/dma/MCD_dmaApi.c |
| 3 | * |
| 4 | * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved. |
| 5 | * Kurt Mahan <kmahan@freescale.com> |
| 6 | * Shrek Wu b16972@freescale.com |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #include "MCD_dma.h" |
| 25 | #include "MCD_tasksInit.h" |
| 26 | #include "MCD_progCheck.h" |
| 27 | |
| 28 | /********************************************************************/ |
| 29 | /* |
| 30 | * This is an API-internal pointer to the DMA's registers |
| 31 | */ |
| 32 | dmaRegs *MCD_dmaBar; |
| 33 | |
| 34 | /* |
| 35 | * These are the real and model task tables as generated by the |
| 36 | * build process |
| 37 | */ |
| 38 | extern TaskTableEntry MCD_realTaskTableSrc[NCHANNELS]; |
| 39 | extern TaskTableEntry MCD_modelTaskTableSrc[NUMOFVARIANTS]; |
| 40 | |
| 41 | /* |
| 42 | * However, this (usually) gets relocated to on-chip SRAM, at which |
| 43 | * point we access them as these tables |
| 44 | */ |
| 45 | volatile TaskTableEntry *MCD_taskTable; |
| 46 | TaskTableEntry *MCD_modelTaskTable; |
| 47 | |
| 48 | |
| 49 | /* |
| 50 | * MCD_chStatus[] is an array of status indicators for remembering |
| 51 | * whether a DMA has ever been attempted on each channel, pausing |
| 52 | * status, etc. |
| 53 | */ |
| 54 | static int MCD_chStatus[NCHANNELS] = |
| 55 | { |
| 56 | MCD_NO_DMA, MCD_NO_DMA, MCD_NO_DMA, MCD_NO_DMA, |
| 57 | MCD_NO_DMA, MCD_NO_DMA, MCD_NO_DMA, MCD_NO_DMA, |
| 58 | MCD_NO_DMA, MCD_NO_DMA, MCD_NO_DMA, MCD_NO_DMA, |
| 59 | MCD_NO_DMA, MCD_NO_DMA, MCD_NO_DMA, MCD_NO_DMA |
| 60 | }; |
| 61 | |
| 62 | /* |
| 63 | * Prototypes for local functions |
| 64 | */ |
| 65 | static void MCD_memcpy(int *dest, int *src, u32 size); |
| 66 | static void MCD_resmActions(int channel); |
| 67 | |
| 68 | /* |
| 69 | * Buffer descriptors used for storage of progress info for single Dmas |
| 70 | * Also used as storage for the DMA for CRCs for single DMAs |
| 71 | * Otherwise, the DMA does not parse these buffer descriptors |
| 72 | */ |
| 73 | #ifdef MCD_INCLUDE_EU |
| 74 | extern MCD_bufDesc MCD_singleBufDescs[NCHANNELS]; |
| 75 | #else |
| 76 | MCD_bufDesc MCD_singleBufDescs[NCHANNELS]; |
| 77 | #endif |
| 78 | MCD_bufDesc *MCD_relocBuffDesc; |
| 79 | |
| 80 | |
| 81 | /* |
| 82 | * Defines for the debug control register's functions |
| 83 | */ |
| 84 | #define DBG_CTL_COMP1_TASK (0x00002000) |
| 85 | /* have comparator 1 look for a task # */ |
| 86 | #define DBG_CTL_ENABLE (DBG_CTL_AUTO_ARM | \ |
| 87 | DBG_CTL_BREAK | \ |
| 88 | DBG_CTL_INT_BREAK | \ |
| 89 | DBG_CTL_COMP1_TASK) |
| 90 | #define DBG_CTL_DISABLE (DBG_CTL_AUTO_ARM | \ |
| 91 | DBG_CTL_INT_BREAK | \ |
| 92 | DBG_CTL_COMP1_TASK) |
| 93 | #define DBG_KILL_ALL_STAT (0xFFFFFFFF) |
| 94 | |
| 95 | /* |
| 96 | * Offset to context save area where progress info is stored |
| 97 | */ |
| 98 | #define CSAVE_OFFSET 10 |
| 99 | |
| 100 | /* |
| 101 | * Defines for Byte Swapping |
| 102 | */ |
| 103 | #define MCD_BYTE_SWAP_KILLER 0xFFF8888F |
| 104 | #define MCD_NO_BYTE_SWAP_ATALL 0x00040000 |
| 105 | |
| 106 | /* |
| 107 | * Execution Unit Identifiers |
| 108 | */ |
| 109 | #define MAC 0 /* legacy - not used */ |
| 110 | #define LUAC 1 /* legacy - not used */ |
| 111 | #define CRC 2 /* legacy - not used */ |
| 112 | #define LURC 3 /* Logic Unit with CRC */ |
| 113 | |
| 114 | /* |
| 115 | * Task Identifiers |
| 116 | */ |
| 117 | #define TASK_CHAINNOEU 0 |
| 118 | #define TASK_SINGLENOEU 1 |
| 119 | #ifdef MCD_INCLUDE_EU |
| 120 | #define TASK_CHAINEU 2 |
| 121 | #define TASK_SINGLEEU 3 |
| 122 | #define TASK_FECRX 4 |
| 123 | #define TASK_FECTX 5 |
| 124 | #else |
| 125 | #define TASK_CHAINEU 0 |
| 126 | #define TASK_SINGLEEU 1 |
| 127 | #define TASK_FECRX 2 |
| 128 | #define TASK_FECTX 3 |
| 129 | #endif |
| 130 | |
| 131 | /* |
| 132 | * Structure to remember which variant is on which channel |
| 133 | */ |
| 134 | typedef struct MCD_remVariants_struct MCD_remVariant; |
| 135 | struct MCD_remVariants_struct { |
| 136 | int remDestRsdIncr[NCHANNELS]; /* -1,0,1 */ |
| 137 | int remSrcRsdIncr[NCHANNELS]; /* -1,0,1 */ |
| 138 | s16 remDestIncr[NCHANNELS]; /* DestIncr */ |
| 139 | s16 remSrcIncr[NCHANNELS]; /* srcIncr */ |
| 140 | u32 remXferSize[NCHANNELS]; /* xferSize */ |
| 141 | }; |
| 142 | |
| 143 | /* |
| 144 | * Structure to remember the startDma parameters for each channel |
| 145 | */ |
| 146 | MCD_remVariant MCD_remVariants; |
| 147 | |
| 148 | /********************************************************************/ |
| 149 | /* |
| 150 | * Function: MCD_initDma |
| 151 | * Purpose: Initializes the DMA API by setting up a pointer to the DMA |
| 152 | * registers, relocating and creating the appropriate task |
| 153 | * structures, and setting up some global settings |
| 154 | * Arguments: |
| 155 | * dmaBarAddr - pointer to the multichannel DMA registers |
| 156 | * taskTableDest - location to move DMA task code and structs to |
| 157 | * flags - operational parameters |
| 158 | * Return Value: |
| 159 | * MCD_TABLE_UNALIGNED if taskTableDest is not 512-byte aligned |
| 160 | * MCD_OK otherwise |
| 161 | */ |
| 162 | extern u32 MCD_funcDescTab0[]; |
| 163 | |
| 164 | int MCD_initDma(dmaRegs *dmaBarAddr, void *taskTableDest, u32 flags) |
| 165 | { |
| 166 | int i; |
| 167 | TaskTableEntry *entryPtr; |
| 168 | |
| 169 | /* Setup the local pointer to register set */ |
| 170 | MCD_dmaBar = dmaBarAddr; |
| 171 | |
| 172 | /* Do we need to move/create a task table */ |
| 173 | if ((flags & MCD_RELOC_TASKS) != 0) { |
| 174 | int fixedSize; |
| 175 | u32 *fixedPtr; |
| 176 | int varTabsOffset, funcDescTabsOffset; |
| 177 | int contextSavesOffset; |
| 178 | int taskDescTabsOffset; |
| 179 | int taskTableSize, varTabsSize; |
| 180 | int funcDescTabsSize, contextSavesSize; |
| 181 | int taskDescTabSize; |
| 182 | int i; |
| 183 | |
| 184 | /* Check if physical address is |
| 185 | * aligned on 512 byte boundary */ |
| 186 | if (((u32)taskTableDest & 0x000001ff) != 0) |
| 187 | return MCD_TABLE_UNALIGNED; |
| 188 | |
| 189 | MCD_taskTable = taskTableDest; |
| 190 | /* set up local pointer to task Table */ |
| 191 | |
| 192 | /* |
| 193 | * Create a task table: |
| 194 | * compute aligned base offsets for variable tables and |
| 195 | * function descriptor tables, then |
| 196 | * loop through the task table and setup the pointers |
| 197 | *copy over model task table with the the actual |
| 198 | *task descriptor tables |
| 199 | */ |
| 200 | taskTableSize = NCHANNELS * sizeof(TaskTableEntry); |
| 201 | /* Align variable tables to size */ |
| 202 | varTabsOffset = taskTableSize + (u32)taskTableDest; |
| 203 | if ((varTabsOffset & (VAR_TAB_SIZE - 1)) != 0) |
| 204 | varTabsOffset = (varTabsOffset + VAR_TAB_SIZE) |
| 205 | & (~VAR_TAB_SIZE); |
| 206 | /* Align function descriptor tables */ |
| 207 | varTabsSize = NCHANNELS * VAR_TAB_SIZE; |
| 208 | funcDescTabsOffset = varTabsOffset + varTabsSize; |
| 209 | |
| 210 | if ((funcDescTabsOffset & (FUNCDESC_TAB_SIZE - 1)) != 0) |
| 211 | funcDescTabsOffset = (funcDescTabsOffset |
| 212 | + FUNCDESC_TAB_SIZE) & |
| 213 | (~FUNCDESC_TAB_SIZE); |
| 214 | |
| 215 | funcDescTabsSize = FUNCDESC_TAB_NUM * FUNCDESC_TAB_SIZE; |
| 216 | contextSavesOffset = funcDescTabsOffset |
| 217 | + funcDescTabsSize; |
| 218 | contextSavesSize = (NCHANNELS * CONTEXT_SAVE_SIZE); |
| 219 | fixedSize = taskTableSize + varTabsSize + |
| 220 | funcDescTabsSize + contextSavesSize; |
| 221 | |
| 222 | /* Zero the thing out */ |
| 223 | fixedPtr = (u32 *)taskTableDest; |
| 224 | for (i = 0; i < (fixedSize/4); i++) |
| 225 | fixedPtr[i] = 0; |
| 226 | |
| 227 | entryPtr = (TaskTableEntry *)MCD_taskTable; |
| 228 | /* Set up fixed pointers */ |
| 229 | for (i = 0; i < NCHANNELS; i++) { |
| 230 | entryPtr[i].varTab = (u32)varTabsOffset; |
| 231 | /* update ptr to local value */ |
| 232 | entryPtr[i].FDTandFlags = |
| 233 | (u32)funcDescTabsOffset | MCD_TT_FLAGS_DEF; |
| 234 | entryPtr[i].contextSaveSpace = |
| 235 | (u32)contextSavesOffset; |
| 236 | varTabsOffset += VAR_TAB_SIZE; |
| 237 | #ifdef MCD_INCLUDE_EU |
| 238 | /* if not there is only one, |
| 239 | * just point to the same one */ |
| 240 | funcDescTabsOffset += FUNCDESC_TAB_SIZE; |
| 241 | #endif |
| 242 | contextSavesOffset += CONTEXT_SAVE_SIZE; |
| 243 | } |
| 244 | /* Copy over the function descriptor table */ |
| 245 | for (i = 0; i < FUNCDESC_TAB_NUM; i++) { |
| 246 | MCD_memcpy((void *)(entryPtr[i].FDTandFlags |
| 247 | & ~MCD_TT_FLAGS_MASK), |
| 248 | (void *)MCD_funcDescTab0, |
| 249 | FUNCDESC_TAB_SIZE); |
| 250 | } |
| 251 | |
| 252 | /* Copy model task table to where the |
| 253 | * context save stuff leaves off */ |
| 254 | MCD_modelTaskTable = |
| 255 | (TaskTableEntry *)contextSavesOffset; |
| 256 | |
| 257 | MCD_memcpy((void *)MCD_modelTaskTable, |
| 258 | (void *)MCD_modelTaskTableSrc, |
| 259 | NUMOFVARIANTS * sizeof(TaskTableEntry)); |
| 260 | |
| 261 | /* Point to local version of model task table */ |
| 262 | entryPtr = MCD_modelTaskTable; |
| 263 | taskDescTabsOffset = (u32)MCD_modelTaskTable + |
| 264 | (NUMOFVARIANTS * sizeof(TaskTableEntry)); |
| 265 | |
| 266 | /* Copy actual task code and update TDT ptrs |
| 267 | * in local model task table */ |
| 268 | for (i = 0; i < NUMOFVARIANTS; i++) { |
| 269 | taskDescTabSize = entryPtr[i].TDTend |
| 270 | - entryPtr[i].TDTstart + 4; |
| 271 | MCD_memcpy((void *)taskDescTabsOffset, |
| 272 | (void *)entryPtr[i].TDTstart, |
| 273 | taskDescTabSize); |
| 274 | entryPtr[i].TDTstart = |
| 275 | (u32)taskDescTabsOffset; |
| 276 | taskDescTabsOffset += taskDescTabSize; |
| 277 | entryPtr[i].TDTend = |
| 278 | (u32)taskDescTabsOffset - 4; |
| 279 | } |
| 280 | #ifdef MCD_INCLUDE_EU |
| 281 | /* |
| 282 | * Tack single DMA BDs onto end of |
| 283 | * code so API controls where |
| 284 | * they are since DMA might write to them |
| 285 | */ |
| 286 | MCD_relocBuffDesc = (MCD_bufDesc *) |
| 287 | (entryPtr[NUMOFVARIANTS - 1].TDTend + 4); |
| 288 | #else |
| 289 | /* |
| 290 | * DMA does not touch them so they |
| 291 | * can be wherever and we don't need to |
| 292 | * waste SRAM on them |
| 293 | */ |
| 294 | MCD_relocBuffDesc = MCD_singleBufDescs; |
| 295 | #endif |
| 296 | } else { |
| 297 | /* |
| 298 | * Point the would-be relocated task tables and |
| 299 | * the buffer descriptors |
| 300 | * to the ones the linker generated |
| 301 | */ |
| 302 | if (((u32)MCD_realTaskTableSrc & 0x000001ff) != 0) |
| 303 | return MCD_TABLE_UNALIGNED; |
| 304 | |
| 305 | entryPtr = MCD_realTaskTableSrc; |
| 306 | for (i = 0; i < NCHANNELS; i++) { |
| 307 | if (((entryPtr[i].varTab |
| 308 | & (VAR_TAB_SIZE - 1)) != 0) || |
| 309 | ((entryPtr[i].FDTandFlags & |
| 310 | (FUNCDESC_TAB_SIZE - 1)) != 0)) |
| 311 | return MCD_TABLE_UNALIGNED; |
| 312 | } |
| 313 | |
| 314 | MCD_taskTable = MCD_realTaskTableSrc; |
| 315 | MCD_modelTaskTable = MCD_modelTaskTableSrc; |
| 316 | MCD_relocBuffDesc = MCD_singleBufDescs; |
| 317 | } |
| 318 | |
| 319 | /* Make all channels inactive, |
| 320 | * and remember them as such: */ |
| 321 | MCD_dmaBar->taskbar = (u32) MCD_taskTable; |
| 322 | for (i = 0; i < NCHANNELS; i++) { |
| 323 | MCD_dmaBar->taskControl[i] = 0x0; |
| 324 | MCD_chStatus[i] = MCD_NO_DMA; |
| 325 | } |
| 326 | |
| 327 | /* Set up pausing mechanism to inactive state: */ |
| 328 | MCD_dmaBar->debugComp1 = 0; |
| 329 | MCD_dmaBar->debugComp2 = 0; |
| 330 | MCD_dmaBar->debugControl = DBG_CTL_DISABLE; |
| 331 | MCD_dmaBar->debugStatus = DBG_KILL_ALL_STAT; |
| 332 | |
| 333 | /* Enable or disable commbus prefetch */ |
| 334 | if ((flags & MCD_COMM_PREFETCH_EN) != 0) |
| 335 | MCD_dmaBar->ptdControl &= ~PTD_CTL_COMM_PREFETCH; |
| 336 | else |
| 337 | MCD_dmaBar->ptdControl |= PTD_CTL_COMM_PREFETCH; |
| 338 | |
| 339 | return MCD_OK; |
| 340 | } |
| 341 | /*********************** End of MCD_initDma() ***********************/ |
| 342 | |
| 343 | /********************************************************************/ |
| 344 | /* Function: MCD_dmaStatus |
| 345 | * Purpose: Returns the status of the DMA on the requested channel |
| 346 | * Arguments: channel - channel number |
| 347 | * Returns: Predefined status indicators |
| 348 | */ |
| 349 | int MCD_dmaStatus(int channel) |
| 350 | { |
| 351 | u16 tcrValue; |
| 352 | |
| 353 | if ((channel < 0) || (channel >= NCHANNELS)) |
| 354 | return MCD_CHANNEL_INVALID; |
| 355 | |
| 356 | tcrValue = MCD_dmaBar->taskControl[channel]; |
| 357 | if ((tcrValue & TASK_CTL_EN) == 0) { |
| 358 | /* Nothing running if last reported |
| 359 | * with task enabled */ |
| 360 | if (MCD_chStatus[channel] == MCD_RUNNING |
| 361 | || MCD_chStatus[channel] == MCD_IDLE) |
| 362 | MCD_chStatus[channel] = MCD_DONE; |
| 363 | } else /* something is running */{ |
| 364 | /* There are three possibilities: |
| 365 | * paused, running or idle. */ |
| 366 | if (MCD_chStatus[channel] == MCD_RUNNING |
| 367 | || MCD_chStatus[channel] == MCD_IDLE) { |
| 368 | MCD_dmaBar->ptdDebug = PTD_DBG_TSK_VLD_INIT; |
| 369 | /* Determine which initiator |
| 370 | * is asserted. */ |
| 371 | if ((MCD_dmaBar->ptdDebug >> channel) & 0x1) |
| 372 | MCD_chStatus[channel] = MCD_RUNNING; |
| 373 | else |
| 374 | MCD_chStatus[channel] = MCD_IDLE; |
| 375 | /* Do not change the status if it is already paused */ |
| 376 | } |
| 377 | } |
| 378 | return MCD_chStatus[channel]; |
| 379 | } |
| 380 | /******************** End of MCD_dmaStatus() ************************/ |
| 381 | |
| 382 | /********************************************************************/ |
| 383 | /* Function: MCD_startDma |
| 384 | * Ppurpose: Starts a particular kind of DMA |
| 385 | * Arguments: see below |
| 386 | * Returns: MCD_CHANNEL_INVALID if channel is invalid, else MCD_OK |
| 387 | */ |
| 388 | |
| 389 | int MCD_startDma( |
| 390 | int channel, |
| 391 | /* the channel on which to run the DMA */ |
| 392 | s8 *srcAddr, |
| 393 | /* the address to move data from, |
| 394 | * or physical buffer-descriptor address */ |
| 395 | s16 srcIncr, |
| 396 | /* the amount to increment the source |
| 397 | * address per transfer */ |
| 398 | s8 *destAddr, |
| 399 | /* the address to move data to */ |
| 400 | s16 destIncr, |
| 401 | /* the amount to increment the |
| 402 | * destination address per transfer */ |
| 403 | u32 dmaSize, |
| 404 | /* the number of bytes to transfer |
| 405 | * independent of the transfer size */ |
| 406 | u32 xferSize, |
| 407 | /* the number bytes in of each data |
| 408 | * movement (1, 2, or 4) */ |
| 409 | u32 initiator, |
| 410 | /* what device initiates the DMA */ |
| 411 | int priority, |
| 412 | /* priority of the DMA */ |
| 413 | u32 flags, |
| 414 | /* flags describing the DMA */ |
| 415 | u32 funcDesc |
| 416 | /* a description of byte swapping, |
| 417 | * bit swapping, and CRC actions */ |
| 418 | #ifdef MCD_NEED_ADDR_TRANS |
| 419 | s8 *srcAddrVirt |
| 420 | /* virtual buffer descriptor address TBD*/ |
| 421 | #endif |
| 422 | ) |
| 423 | { |
| 424 | int srcRsdIncr, destRsdIncr; |
| 425 | int *cSave; |
| 426 | short xferSizeIncr; |
| 427 | int tcrCount = 0; |
| 428 | #ifdef MCD_INCLUDE_EU |
| 429 | u32 *realFuncArray; |
| 430 | #endif |
| 431 | |
| 432 | if ((channel < 0) || (channel >= NCHANNELS)) |
| 433 | return MCD_CHANNEL_INVALID; |
| 434 | |
| 435 | #ifndef MCD_INCLUDE_EU |
| 436 | funcDesc = MCD_FUNC_NOEU1; |
| 437 | #endif |
| 438 | |
| 439 | #ifdef MCD_DEBUG |
| 440 | printf("startDma:Setting up params\n"); |
| 441 | #endif |
| 442 | |
| 443 | /* Enable task-wise priority */ |
| 444 | MCD_dmaBar->ptdControl |= (u16) 0x8000; |
| 445 | |
| 446 | /* Calculate additional parameters |
| 447 | * to the regular DMA calls. */ |
| 448 | srcRsdIncr = srcIncr < 0 ? -1 : (srcIncr > 0 ? 1 : 0); |
| 449 | destRsdIncr = destIncr < 0 ? -1 : (destIncr > 0 ? 1 : 0); |
| 450 | xferSizeIncr = (xferSize & 0xffff) | 0x20000000; |
| 451 | |
| 452 | /* Remember which variant is running for each channel */ |
| 453 | MCD_remVariants.remSrcRsdIncr[channel] = srcRsdIncr; |
| 454 | MCD_remVariants.remDestRsdIncr[channel] = destRsdIncr; |
| 455 | MCD_remVariants.remDestIncr[channel] = destIncr; |
| 456 | MCD_remVariants.remSrcIncr[channel] = srcIncr; |
| 457 | MCD_remVariants.remXferSize[channel] = xferSize; |
| 458 | |
| 459 | cSave = (int *)(MCD_taskTable[channel].contextSaveSpace) |
| 460 | + CSAVE_OFFSET |
| 461 | + CURRBD; |
| 462 | |
| 463 | #ifdef MCD_INCLUDE_EU |
| 464 | realFuncArray = (u32 *)(MCD_taskTable[channel].FDTandFlags |
| 465 | & 0xffffff00); |
| 466 | |
| 467 | /* |
| 468 | * Modify the LURC's normal and byte-residue-loop functions |
| 469 | * according to parameter. |
| 470 | */ |
| 471 | switch (xferSize) { |
| 472 | case 4: |
| 473 | realFuncArray[(LURC*16)] = funcDesc; |
| 474 | break; |
| 475 | case 2: |
| 476 | realFuncArray[(LURC*16)] = funcDesc & 0xfffff00f; |
| 477 | break; |
| 478 | case 1: |
| 479 | default: |
| 480 | realFuncArray[(LURC*16)] = funcDesc & 0xffff000f; |
| 481 | break; |
| 482 | } |
| 483 | |
| 484 | realFuncArray[(LURC*16 + 1)] = 0 |
| 485 | | (funcDesc & MCD_BYTE_SWAP_KILLER) |
| 486 | | MCD_NO_BYTE_SWAP_ATALL; |
| 487 | #endif |
| 488 | |
| 489 | /* Write the initiator field in the TCR and |
| 490 | * set the initiator-hold bit*/ |
| 491 | MCD_dmaBar->taskControl[channel] = 0 |
| 492 | | (initiator << 8) |
| 493 | | TASK_CTL_HIPRITSKEN |
| 494 | | TASK_CTL_HLDINITNUM; |
| 495 | |
| 496 | /* |
| 497 | * Current versions of the MPC8220 MCD have a hardware quirk that could |
| 498 | * cause the write to the TCR to collide with an MDE access to the |
| 499 | * initiator-register file, so we have to verify that the write occurred |
| 500 | * correctly by reading back the value. On MCF547x/8x devices and any |
| 501 | * future revisions of the MPC8220, this loop will not be entered. |
| 502 | */ |
| 503 | while (((MCD_dmaBar->taskControl[channel] & 0x1fff) != |
| 504 | ((initiator << 8) | TASK_CTL_HIPRITSKEN |
| 505 | | TASK_CTL_HLDINITNUM)) && (tcrCount < 1000)) { |
| 506 | tcrCount++; |
| 507 | MCD_dmaBar->taskControl[channel] = 0 |
| 508 | | (initiator << 8) |
| 509 | | TASK_CTL_HIPRITSKEN |
| 510 | | TASK_CTL_HLDINITNUM; |
| 511 | } |
| 512 | |
| 513 | MCD_dmaBar->priority[channel] = (u8)priority & PRIORITY_PRI_MASK; |
| 514 | |
| 515 | if (channel < 8 && channel >= 0) { |
| 516 | MCD_dmaBar->taskSize0 &= ~(0xf << (7-channel)*4); |
| 517 | MCD_dmaBar->taskSize0 |
| 518 | |= (xferSize & 3) << (((7 - channel)*4) + 2); |
| 519 | MCD_dmaBar->taskSize0 |
| 520 | |= (xferSize & 3) << ((7 - channel)*4); |
| 521 | } else { |
| 522 | MCD_dmaBar->taskSize1 &= ~(0xf << (15-channel)*4); |
| 523 | MCD_dmaBar->taskSize1 |
| 524 | |= (xferSize & 3) << (((15 - channel)*4) + 2); |
| 525 | MCD_dmaBar->taskSize1 |
| 526 | |= (xferSize & 3) << ((15 - channel)*4); |
| 527 | } |
| 528 | |
| 529 | /* Setup task table flags/options */ |
| 530 | MCD_taskTable[channel].FDTandFlags &= ~MCD_TT_FLAGS_MASK; |
| 531 | MCD_taskTable[channel].FDTandFlags |= (MCD_TT_FLAGS_MASK & flags); |
| 532 | |
| 533 | if (flags & MCD_FECTX_DMA) { |
| 534 | /* TDTStart and TDTEnd */ |
| 535 | MCD_taskTable[channel].TDTstart = |
| 536 | MCD_modelTaskTable[TASK_FECTX].TDTstart; |
| 537 | MCD_taskTable[channel].TDTend = |
| 538 | MCD_modelTaskTable[TASK_FECTX].TDTend; |
| 539 | MCD_startDmaENetXmit(srcAddr, srcAddr, destAddr, |
| 540 | MCD_taskTable, channel); |
| 541 | } else if (flags & MCD_FECRX_DMA) { |
| 542 | /* TDTStart and TDTEnd */ |
| 543 | MCD_taskTable[channel].TDTstart = |
| 544 | MCD_modelTaskTable[TASK_FECRX].TDTstart; |
| 545 | MCD_taskTable[channel].TDTend = |
| 546 | MCD_modelTaskTable[TASK_FECRX].TDTend; |
| 547 | MCD_startDmaENetRcv(srcAddr, srcAddr, destAddr, |
| 548 | MCD_taskTable, channel); |
| 549 | } else if (flags & MCD_SINGLE_DMA) { |
| 550 | /* |
| 551 | * This buffer descriptor is used for storing off |
| 552 | * initial parameters for later progress query |
| 553 | * calculation and for the DMA to write the resulting |
| 554 | * checksum. The DMA does not use this to determine how |
| 555 | * to operate, that info is passed with the init routine |
| 556 | */ |
| 557 | MCD_relocBuffDesc[channel].srcAddr = srcAddr; |
| 558 | MCD_relocBuffDesc[channel].destAddr = destAddr; |
| 559 | MCD_relocBuffDesc[channel].lastDestAddr = destAddr; |
| 560 | MCD_relocBuffDesc[channel].dmaSize = dmaSize; |
| 561 | MCD_relocBuffDesc[channel].flags = 0; |
| 562 | /* not used */ |
| 563 | MCD_relocBuffDesc[channel].csumResult = 0; |
| 564 | /* not used */ |
| 565 | MCD_relocBuffDesc[channel].next = 0; |
| 566 | /* not used */ |
| 567 | |
| 568 | /* Initialize the progress-querying stuff |
| 569 | * to show no progress:*/ |
| 570 | ((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 571 | SRCPTR + CSAVE_OFFSET] = (int)srcAddr; |
| 572 | ((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 573 | DESTPTR + CSAVE_OFFSET] = (int)destAddr; |
| 574 | ((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 575 | DCOUNT + CSAVE_OFFSET] = 0; |
| 576 | ((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 577 | CURRBD + CSAVE_OFFSET] = |
| 578 | (u32) &(MCD_relocBuffDesc[channel]); |
| 579 | |
| 580 | if ((funcDesc == MCD_FUNC_NOEU1) |
| 581 | || (funcDesc == MCD_FUNC_NOEU2)) { |
| 582 | /* TDTStart and TDTEnd */ |
| 583 | MCD_taskTable[channel].TDTstart = |
| 584 | MCD_modelTaskTable[TASK_SINGLENOEU].TDTstart; |
| 585 | MCD_taskTable[channel].TDTend = |
| 586 | MCD_modelTaskTable[TASK_SINGLENOEU].TDTend; |
| 587 | MCD_startDmaSingleNoEu(srcAddr, srcIncr, destAddr, |
| 588 | destIncr, dmaSize, xferSizeIncr, flags, |
| 589 | (int *)&(MCD_relocBuffDesc[channel]), |
| 590 | cSave, MCD_taskTable, channel); |
| 591 | } else { |
| 592 | /* TDTStart and TDTEnd */ |
| 593 | MCD_taskTable[channel].TDTstart = |
| 594 | MCD_modelTaskTable[TASK_SINGLEEU].TDTstart; |
| 595 | MCD_taskTable[channel].TDTend = |
| 596 | MCD_modelTaskTable[TASK_SINGLEEU].TDTend; |
| 597 | MCD_startDmaSingleEu(srcAddr, srcIncr, destAddr, |
| 598 | destIncr, dmaSize, xferSizeIncr, flags, |
| 599 | (int *)&(MCD_relocBuffDesc[channel]), |
| 600 | cSave, MCD_taskTable, channel); |
| 601 | } |
| 602 | } else /* Chained DMA */ { |
| 603 | /* Initialize the progress-querying |
| 604 | * stuff to show no progress:*/ |
| 605 | #if 1 /* (!defined(MCD_NEED_ADDR_TRANS)) */ |
| 606 | ((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 607 | SRCPTR + CSAVE_OFFSET] |
| 608 | = (int)((MCD_bufDesc *) srcAddr)->srcAddr; |
| 609 | ((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 610 | DESTPTR + CSAVE_OFFSET] |
| 611 | = (int)((MCD_bufDesc *) srcAddr)->destAddr; |
| 612 | #else |
| 613 | /* if using address translation, need the |
| 614 | * virtual addr of the first buffdesc */ |
| 615 | ((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 616 | SRCPTR + CSAVE_OFFSET] |
| 617 | = (int)((MCD_bufDesc *) srcAddrVirt)->srcAddr; |
| 618 | ((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 619 | DESTPTR + CSAVE_OFFSET] |
| 620 | = (int)((MCD_bufDesc *) srcAddrVirt)->destAddr; |
| 621 | #endif |
| 622 | ((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 623 | DCOUNT + CSAVE_OFFSET] = 0; |
| 624 | ((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 625 | CURRBD + CSAVE_OFFSET] = (u32) srcAddr; |
| 626 | |
| 627 | if (funcDesc == MCD_FUNC_NOEU1 |
| 628 | || funcDesc == MCD_FUNC_NOEU2) { |
| 629 | /* TDTStart and TDTEnd */ |
| 630 | MCD_taskTable[channel].TDTstart = |
| 631 | MCD_modelTaskTable[TASK_CHAINNOEU].TDTstart; |
| 632 | MCD_taskTable[channel].TDTend = |
| 633 | MCD_modelTaskTable[TASK_CHAINNOEU].TDTend; |
| 634 | MCD_startDmaChainNoEu((int *)srcAddr, srcIncr, |
| 635 | destIncr, xferSize, xferSizeIncr, cSave, |
| 636 | MCD_taskTable, channel); |
| 637 | } else { |
| 638 | /* TDTStart and TDTEnd */ |
| 639 | MCD_taskTable[channel].TDTstart = |
| 640 | MCD_modelTaskTable[TASK_CHAINEU].TDTstart; |
| 641 | MCD_taskTable[channel].TDTend = |
| 642 | MCD_modelTaskTable[TASK_CHAINEU].TDTend; |
| 643 | MCD_startDmaChainEu((int *)srcAddr, srcIncr, destIncr, |
| 644 | xferSize, xferSizeIncr, cSave, |
| 645 | MCD_taskTable, channel); |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | MCD_chStatus[channel] = MCD_IDLE; |
| 650 | return MCD_OK; |
| 651 | } |
| 652 | |
| 653 | /************************ End of MCD_startDma() *********************/ |
| 654 | |
| 655 | /********************************************************************/ |
| 656 | /* Function: MCD_XferProgrQuery |
| 657 | * Purpose: Returns progress of DMA on requested channel |
| 658 | * Arguments: channel - channel to retrieve progress for |
| 659 | * progRep - pointer to user supplied MCD_XferProg struct |
| 660 | * Returns: MCD_CHANNEL_INVALID if channel is invalid, else MCD_OK |
| 661 | * |
| 662 | * Notes: |
| 663 | * MCD_XferProgrQuery() upon completing or after aborting a DMA, or |
| 664 | * while the DMA is in progress, this function returns the first |
| 665 | * DMA-destination address not (or not yet) used in the DMA. When |
| 666 | * encountering a non-ready buffer descriptor, the information for |
| 667 | * the last completed descriptor is returned. |
| 668 | * |
| 669 | * MCD_XferProgQuery() has to avoid the possibility of getting |
| 670 | * partially-updated information in the event that we should happen |
| 671 | * to query DMA progress just as the DMA is updating it. It does that |
| 672 | * by taking advantage of the fact context is not saved frequently for |
| 673 | * the most part. We therefore read it at least twice until we get the |
| 674 | * same information twice in a row. |
| 675 | * |
| 676 | * Because a small, but not insignificant, amount of time is required |
| 677 | * to write out the progress-query information, especially upon |
| 678 | * completion of the DMA, it would be wise to guarantee some time lag |
| 679 | * between successive readings of the progress-query information. |
| 680 | */ |
| 681 | |
| 682 | /* |
| 683 | * How many iterations of the loop below to execute to stabilize values |
| 684 | */ |
| 685 | #define STABTIME 0 |
| 686 | |
| 687 | int MCD_XferProgrQuery(int channel, MCD_XferProg *progRep) |
| 688 | { |
| 689 | MCD_XferProg prevRep; |
| 690 | int again; |
| 691 | /* true if we are to try again to get consistent results */ |
| 692 | int i; /* used as a time-waste counter */ |
| 693 | int destDiffBytes; |
| 694 | /* Total number of bytes that we think actually got xfered. */ |
| 695 | int numIterations; /* number of iterations */ |
| 696 | int bytesNotXfered; /* bytes that did not get xfered. */ |
| 697 | s8 *LWAlignedInitDestAddr, *LWAlignedCurrDestAddr; |
| 698 | int subModVal, addModVal; |
| 699 | /* Mode values to added and subtracted from the final destAddr */ |
| 700 | |
| 701 | if ((channel < 0) || (channel >= NCHANNELS)) |
| 702 | return MCD_CHANNEL_INVALID; |
| 703 | |
| 704 | /* Read a trial value for the progress-reporting values*/ |
| 705 | prevRep.lastSrcAddr = |
| 706 | (s8 *)((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 707 | SRCPTR + CSAVE_OFFSET]; |
| 708 | prevRep.lastDestAddr = |
| 709 | (s8 *)((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 710 | DESTPTR + CSAVE_OFFSET]; |
| 711 | prevRep.dmaSize = |
| 712 | ((volatile int *)MCD_taskTable[channel].contextSaveSpace)[ |
| 713 | DCOUNT + CSAVE_OFFSET]; |
| 714 | prevRep.currBufDesc = |
| 715 | (MCD_bufDesc *)((volatile int *)MCD_taskTable[ |
| 716 | channel].contextSaveSpace)[CURRBD + CSAVE_OFFSET]; |
| 717 | |
| 718 | /* Repeatedly reread those values until |
| 719 | * they match previous values: */ |
| 720 | do { |
| 721 | /* Take a little bit of time to ensure stability: */ |
| 722 | for (i = 0; i < STABTIME; i++) |
| 723 | i += i >> 2; |
| 724 | /* make sure this loop does something so that it |
| 725 | doesn't get optimized out */ |
| 726 | /* Check them again: */ |
| 727 | progRep->lastSrcAddr = |
| 728 | (s8 *)((volatile int *)MCD_taskTable[ |
| 729 | channel].contextSaveSpace)[SRCPTR + CSAVE_OFFSET]; |
| 730 | progRep->lastDestAddr = |
| 731 | (s8 *)((volatile int *)MCD_taskTable[ |
| 732 | channel].contextSaveSpace)[DESTPTR + CSAVE_OFFSET]; |
| 733 | progRep->dmaSize = ((volatile int *)MCD_taskTable[ |
| 734 | channel].contextSaveSpace)[DCOUNT + CSAVE_OFFSET]; |
| 735 | progRep->currBufDesc = |
| 736 | (MCD_bufDesc *)((volatile int *)MCD_taskTable[ |
| 737 | channel].contextSaveSpace)[CURRBD + CSAVE_OFFSET]; |
| 738 | |
| 739 | /* See if they match: */ |
| 740 | if (prevRep.lastSrcAddr != progRep->lastSrcAddr |
| 741 | || prevRep.lastDestAddr != progRep->lastDestAddr |
| 742 | || prevRep.dmaSize != progRep->dmaSize |
| 743 | || prevRep.currBufDesc != progRep->currBufDesc) { |
| 744 | /* If they don't match, remember previous |
| 745 | values and try again:*/ |
| 746 | prevRep.lastSrcAddr = progRep->lastSrcAddr; |
| 747 | prevRep.lastDestAddr = progRep->lastDestAddr; |
| 748 | prevRep.dmaSize = progRep->dmaSize; |
| 749 | prevRep.currBufDesc = progRep->currBufDesc; |
| 750 | again = MCD_TRUE; |
| 751 | } else |
| 752 | again = MCD_FALSE; |
| 753 | } while (again == MCD_TRUE); |
| 754 | |
| 755 | |
| 756 | /* Update dmaSize and lastDestAddr */ |
| 757 | switch (MCD_remVariants.remDestRsdIncr[channel]) { |
| 758 | case MINUS1: |
| 759 | subModVal = ((int)progRep->lastDestAddr) |
| 760 | & ((MCD_remVariants.remXferSize[channel]) - 1); |
| 761 | addModVal = ((int)progRep->currBufDesc->destAddr) |
| 762 | & ((MCD_remVariants.remXferSize[channel]) - 1); |
| 763 | LWAlignedInitDestAddr = (progRep->currBufDesc->destAddr) |
| 764 | - addModVal; |
| 765 | LWAlignedCurrDestAddr = (progRep->lastDestAddr) - subModVal; |
| 766 | destDiffBytes = LWAlignedInitDestAddr - LWAlignedCurrDestAddr; |
| 767 | bytesNotXfered = |
| 768 | (destDiffBytes/MCD_remVariants.remDestIncr[channel]) * |
| 769 | (MCD_remVariants.remDestIncr[channel] |
| 770 | + MCD_remVariants.remXferSize[channel]); |
| 771 | progRep->dmaSize = destDiffBytes - bytesNotXfered |
| 772 | + addModVal - subModVal; |
| 773 | break; |
| 774 | case ZERO: |
| 775 | progRep->lastDestAddr = progRep->currBufDesc->destAddr; |
| 776 | break; |
| 777 | case PLUS1: |
| 778 | /* This value has to be subtracted |
| 779 | from the final calculated dmaSize. */ |
| 780 | subModVal = ((int)progRep->currBufDesc->destAddr) |
| 781 | & ((MCD_remVariants.remXferSize[channel]) - 1); |
| 782 | /* These bytes are already in lastDestAddr. */ |
| 783 | addModVal = ((int)progRep->lastDestAddr) |
| 784 | & ((MCD_remVariants.remXferSize[channel]) - 1); |
| 785 | LWAlignedInitDestAddr = (progRep->currBufDesc->destAddr) |
| 786 | - subModVal; |
| 787 | LWAlignedCurrDestAddr = (progRep->lastDestAddr) - addModVal; |
| 788 | destDiffBytes = (progRep->lastDestAddr - LWAlignedInitDestAddr); |
| 789 | numIterations = (LWAlignedCurrDestAddr - |
| 790 | LWAlignedInitDestAddr)/MCD_remVariants.remDestIncr[channel]; |
| 791 | bytesNotXfered = numIterations * |
| 792 | (MCD_remVariants.remDestIncr[channel] |
| 793 | - MCD_remVariants.remXferSize[channel]); |
| 794 | progRep->dmaSize = destDiffBytes - bytesNotXfered - subModVal; |
| 795 | break; |
| 796 | default: |
| 797 | break; |
| 798 | } |
| 799 | |
| 800 | /* This covers M1,P1,Z for source */ |
| 801 | switch (MCD_remVariants.remSrcRsdIncr[channel]) { |
| 802 | case MINUS1: |
| 803 | progRep->lastSrcAddr = |
| 804 | progRep->currBufDesc->srcAddr + |
| 805 | (MCD_remVariants.remSrcIncr[channel] * |
| 806 | (progRep->dmaSize/MCD_remVariants.remXferSize[channel])); |
| 807 | break; |
| 808 | case ZERO: |
| 809 | progRep->lastSrcAddr = progRep->currBufDesc->srcAddr; |
| 810 | break; |
| 811 | case PLUS1: |
| 812 | progRep->lastSrcAddr = |
| 813 | progRep->currBufDesc->srcAddr + |
| 814 | (MCD_remVariants.remSrcIncr[channel] * |
| 815 | (progRep->dmaSize/MCD_remVariants.remXferSize[channel])); |
| 816 | break; |
| 817 | default: |
| 818 | break; |
| 819 | } |
| 820 | |
| 821 | return MCD_OK; |
| 822 | } |
| 823 | /******************* End of MCD_XferProgrQuery() ********************/ |
| 824 | |
| 825 | /********************************************************************/ |
| 826 | /* MCD_resmActions() does the majority of the actions of a DMA resume. |
| 827 | * It is called from MCD_killDma() and MCD_resumeDma(). It has to be |
| 828 | * a separate function because the kill function has to negate the task |
| 829 | * enable before resuming it, but the resume function has to do nothing |
| 830 | * if there is no DMA on that channel (i.e., if the enable bit is 0). |
| 831 | */ |
| 832 | static void MCD_resmActions(int channel) |
| 833 | { |
| 834 | MCD_dmaBar->debugControl = DBG_CTL_DISABLE; |
| 835 | MCD_dmaBar->debugStatus = MCD_dmaBar->debugStatus; |
| 836 | |
| 837 | /* Determine which initiators are asserted */ |
| 838 | MCD_dmaBar->ptdDebug = PTD_DBG_TSK_VLD_INIT; |
| 839 | |
| 840 | if ((MCD_dmaBar->ptdDebug >> channel) & 0x1) |
| 841 | MCD_chStatus[channel] = MCD_RUNNING; |
| 842 | else |
| 843 | MCD_chStatus[channel] = MCD_IDLE; |
| 844 | } |
| 845 | /********************* End of MCD_resmActions() *********************/ |
| 846 | |
| 847 | /********************************************************************/ |
| 848 | /* Function: MCD_killDma |
| 849 | * Purpose: Halt the DMA on the requested channel, without any |
| 850 | * intention of resuming the DMA. |
| 851 | * Arguments: channel - requested channel |
| 852 | * Returns: MCD_CHANNEL_INVALID if channel is invalid, else MCD_OK |
| 853 | * |
| 854 | * Notes: |
| 855 | * A DMA may be killed from any state, including paused state, and it |
| 856 | * always goes to the MCD_HALTED state even if it is killed while in |
| 857 | * the MCD_NO_DMA or MCD_IDLE states. |
| 858 | */ |
| 859 | int MCD_killDma(int channel) |
| 860 | { |
| 861 | if ((channel < 0) || (channel >= NCHANNELS)) |
| 862 | return MCD_CHANNEL_INVALID; |
| 863 | |
| 864 | MCD_dmaBar->taskControl[channel] = 0x0; |
| 865 | |
| 866 | /* Clean up after a paused task */ |
| 867 | if (MCD_chStatus[channel] == MCD_PAUSED) { |
| 868 | MCD_dmaBar->debugControl = DBG_CTL_DISABLE; |
| 869 | MCD_dmaBar->debugStatus = MCD_dmaBar->debugStatus; |
| 870 | } |
| 871 | |
| 872 | MCD_chStatus[channel] = MCD_HALTED; |
| 873 | |
| 874 | return MCD_OK; |
| 875 | } |
| 876 | /************************ End of MCD_killDma() **********************/ |
| 877 | |
| 878 | /********************************************************************/ |
| 879 | /* Function: MCD_continDma |
| 880 | * Purpose: Continue a DMA which as stopped due to encountering an |
| 881 | * unready buffer descriptor. |
| 882 | * Arguments: channel - channel to continue the DMA on |
| 883 | * Returns: MCD_CHANNEL_INVALID if channel is invalid, else MCD_OK |
| 884 | * |
| 885 | * Notes: |
| 886 | * This routine does not check to see if there is a task which can |
| 887 | * be continued. Also this routine should not be used with single DMAs. |
| 888 | */ |
| 889 | int MCD_continDma(int channel) |
| 890 | { |
| 891 | if ((channel < 0) || (channel >= NCHANNELS)) |
| 892 | return MCD_CHANNEL_INVALID; |
| 893 | |
| 894 | MCD_dmaBar->taskControl[channel] |= TASK_CTL_EN; |
| 895 | MCD_chStatus[channel] = MCD_RUNNING; |
| 896 | |
| 897 | return MCD_OK; |
| 898 | } |
| 899 | /********************** End of MCD_continDma() **********************/ |
| 900 | |
| 901 | /********************************************************************* |
| 902 | * MCD_pauseDma() and MCD_resumeDma() below use the DMA's debug unit |
| 903 | * to freeze a task and resume it. We freeze a task by breakpointing |
| 904 | * on the stated task. That is, not any specific place in the task, |
| 905 | * but any time that task executes. In particular, when that task |
| 906 | * executes, we want to freeze that task and only that task. |
| 907 | * |
| 908 | * The bits of the debug control register influence interrupts vs. |
| 909 | * breakpoints as follows: |
| 910 | * - Bits 14 and 0 enable or disable debug functions. If enabled, you |
| 911 | * will get the interrupt but you may or may not get a breakpoint. |
| 912 | * - Bits 2 and 1 decide whether you also get a breakpoint in addition |
| 913 | * to an interrupt. |
| 914 | * |
| 915 | * The debug unit can do these actions in response to either internally |
| 916 | * detected breakpoint conditions from the comparators, or in response |
| 917 | * to the external breakpoint pin, or both. |
| 918 | * - Bits 14 and 1 perform the above-described functions for |
| 919 | * internally-generated conditions, i.e., the debug comparators. |
| 920 | * - Bits 0 and 2 perform the above-described functions for external |
| 921 | * conditions, i.e., the breakpoint external pin. |
| 922 | * |
| 923 | * Note that, although you "always" get the interrupt when you turn |
| 924 | * the debug functions, the interrupt can nevertheless, if desired, be |
| 925 | * masked by the corresponding bit in the PTD's IMR. Note also that |
| 926 | * this means that bits 14 and 0 must enable debug functions before |
| 927 | * bits 1 and 2, respectively, have any effect. |
| 928 | * |
| 929 | * NOTE: It's extremely important to not pause more than one DMA channel |
| 930 | * at a time. |
| 931 | ********************************************************************/ |
| 932 | |
| 933 | /********************************************************************/ |
| 934 | /* Function: MCD_pauseDma |
| 935 | * Purpose: Pauses the DMA on a given channel (if any DMA is running |
| 936 | * on that channel). |
| 937 | * Arguments: channel |
| 938 | * Returns: MCD_CHANNEL_INVALID if channel is invalid, else MCD_OK |
| 939 | */ |
| 940 | int MCD_pauseDma(int channel) |
| 941 | { |
| 942 | if ((channel < 0) || (channel >= NCHANNELS)) |
| 943 | return MCD_CHANNEL_INVALID; |
| 944 | |
| 945 | if (MCD_dmaBar->taskControl[channel] & TASK_CTL_EN) { |
| 946 | MCD_dmaBar->debugComp1 = channel; |
| 947 | MCD_dmaBar->debugControl = |
| 948 | DBG_CTL_ENABLE | (1 << (channel + 16)); |
| 949 | MCD_chStatus[channel] = MCD_PAUSED; |
| 950 | } |
| 951 | |
| 952 | return MCD_OK; |
| 953 | } |
| 954 | /************************* End of MCD_pauseDma() ********************/ |
| 955 | |
| 956 | /********************************************************************/ |
| 957 | /* Function: MCD_resumeDma |
| 958 | * Purpose: Resumes the DMA on a given channel (if any DMA is |
| 959 | * running on that channel). |
| 960 | * Arguments: channel - channel on which to resume DMA |
| 961 | * Returns: MCD_CHANNEL_INVALID if channel is invalid, else MCD_OK |
| 962 | */ |
| 963 | int MCD_resumeDma(int channel) |
| 964 | { |
| 965 | if ((channel < 0) || (channel >= NCHANNELS)) |
| 966 | return MCD_CHANNEL_INVALID; |
| 967 | |
| 968 | if (MCD_dmaBar->taskControl[channel] & TASK_CTL_EN) |
| 969 | MCD_resmActions(channel); |
| 970 | |
| 971 | return MCD_OK; |
| 972 | } |
| 973 | /************************ End of MCD_resumeDma() ********************/ |
| 974 | |
| 975 | /********************************************************************/ |
| 976 | /* Function: MCD_csumQuery |
| 977 | * Purpose: Provide the checksum after performing a non-chained DMA |
| 978 | * Arguments: channel - channel to report on |
| 979 | * csum - pointer to where to write the checksum/CRC |
| 980 | * Returns: MCD_ERROR if the channel is invalid, else MCD_OK |
| 981 | * |
| 982 | * Notes: |
| 983 | * |
| 984 | */ |
| 985 | int MCD_csumQuery(int channel, u32 *csum) |
| 986 | { |
| 987 | #ifdef MCD_INCLUDE_EU |
| 988 | if ((channel < 0) || (channel >= NCHANNELS)) |
| 989 | return MCD_CHANNEL_INVALID; |
| 990 | |
| 991 | *csum = MCD_relocBuffDesc[channel].csumResult; |
| 992 | return MCD_OK; |
| 993 | #else |
| 994 | return MCD_ERROR; |
| 995 | #endif |
| 996 | } |
| 997 | /*********************** End of MCD_resumeDma() *********************/ |
| 998 | |
| 999 | /********************************************************************/ |
| 1000 | /* Function: MCD_getCodeSize |
| 1001 | * Purpose: Provide the size requirements of the microcoded tasks |
| 1002 | * Returns: Size in bytes |
| 1003 | */ |
| 1004 | int MCD_getCodeSize(void) |
| 1005 | { |
| 1006 | #ifdef MCD_INCLUDE_EU |
| 1007 | return 0x2b64; |
| 1008 | #else |
| 1009 | return 0x1744; |
| 1010 | #endif |
| 1011 | } |
| 1012 | /********************** End of MCD_getCodeSize() ********************/ |
| 1013 | |
| 1014 | /********************************************************************/ |
| 1015 | /* Function: MCD_getVersion |
| 1016 | * Purpose: Provide the version string and number |
| 1017 | * Arguments: longVersion - user supplied pointer to a pointer to a char |
| 1018 | * which points to the version string |
| 1019 | * Returns: Version number and version string (by reference) |
| 1020 | */ |
| 1021 | char MCD_versionString[] = "Multi-channel DMA API v1.0"; |
| 1022 | #define MCD_REV_MAJOR 0x01 |
| 1023 | #define MCD_REV_MINOR 0x00 |
| 1024 | |
| 1025 | int MCD_getVersion(char **longVersion) |
| 1026 | { |
| 1027 | int ret = 0; |
| 1028 | *longVersion = MCD_versionString; |
| 1029 | ret = (MCD_REV_MAJOR << 8) | MCD_REV_MINOR; |
| 1030 | return ret; |
| 1031 | } |
| 1032 | /********************** End of MCD_getVersion() *********************/ |
| 1033 | |
| 1034 | /********************************************************************/ |
| 1035 | /* Private version of memcpy() |
| 1036 | * Note that everything this is used for is longword-aligned. |
| 1037 | */ |
| 1038 | static void MCD_memcpy(int *dest, int *src, u32 size) |
| 1039 | { |
| 1040 | u32 i; |
| 1041 | |
| 1042 | for (i = 0; i < size; i += sizeof(int), dest++, src++) |
| 1043 | *dest = *src; |
| 1044 | } |
| 1045 | /********************************************************************/ |
| 1046 | |
