git.oblomov.eu Git - linux-2.6/blob - drivers/block/paride/ppc6lnx.c

   1 /*
   2         ppc6lnx.c (c) 2001 Micro Solutions Inc.
   3                 Released under the terms of the GNU General Public license
   4
   5         ppc6lnx.c  is a par of the protocol driver for the Micro Solutions
   6                 "BACKPACK" parallel port IDE adapter
   7                 (Works on Series 6 drives)
   8
   9 */
  10
  11 //***************************************************************************
  12
  13 // PPC 6 Code in C sanitized for LINUX
  14 // Original x86 ASM by Ron, Converted to C by Clive
  15
  16 //***************************************************************************
  17
  18
  19 #define port_stb                                        1
  20 #define port_afd                                        2
  21 #define cmd_stb                                         port_afd
  22 #define port_init                                       4
  23 #define data_stb                                        port_init
  24 #define port_sel                                        8
  25 #define port_int                                        16
  26 #define port_dir                                        0x20
  27
  28 #define ECR_EPP 0x80
  29 #define ECR_BI  0x20
  30
  31 //***************************************************************************
  32
  33 //  60772 Commands
  34
  35 #define ACCESS_REG                              0x00
  36 #define ACCESS_PORT                             0x40
  37
  38 #define ACCESS_READ                             0x00
  39 #define ACCESS_WRITE                    0x20
  40
  41 //  60772 Command Prefix
  42
  43 #define CMD_PREFIX_SET          0xe0            // Special command that modifies the next command's operation
  44 #define CMD_PREFIX_RESET        0xc0            // Resets current cmd modifier reg bits
  45  #define PREFIX_IO16                    0x01            // perform 16-bit wide I/O
  46  #define PREFIX_FASTWR          0x04            // enable PPC mode fast-write
  47  #define PREFIX_BLK                             0x08            // enable block transfer mode
  48
  49 // 60772 Registers
  50
  51 #define REG_STATUS                              0x00            // status register
  52  #define STATUS_IRQA                    0x01            // Peripheral IRQA line
  53  #define STATUS_EEPROM_DO       0x40            // Serial EEPROM data bit
  54 #define REG_VERSION                             0x01            // PPC version register (read)
  55 #define REG_HWCFG                                       0x02            // Hardware Config register
  56 #define REG_RAMSIZE                             0x03            // Size of RAM Buffer
  57  #define RAMSIZE_128K                   0x02
  58 #define REG_EEPROM                              0x06            // EEPROM control register
  59  #define EEPROM_SK                              0x01            // eeprom SK bit
  60  #define EEPROM_DI                              0x02            // eeprom DI bit
  61  #define EEPROM_CS                              0x04            // eeprom CS bit
  62  #define EEPROM_EN                              0x08            // eeprom output enable
  63 #define REG_BLKSIZE                             0x08            // Block transfer len (24 bit)
  64
  65 //***************************************************************************
  66
  67 typedef struct ppc_storage {
  68         u16     lpt_addr;                               // LPT base address
  69         u8      ppc_id;
  70         u8      mode;                                           // operating mode
  71                                         // 0 = PPC Uni SW
  72                                         // 1 = PPC Uni FW
  73                                         // 2 = PPC Bi SW
  74                                         // 3 = PPC Bi FW
  75                                         // 4 = EPP Byte
  76                                         // 5 = EPP Word
  77                                         // 6 = EPP Dword
  78         u8      ppc_flags;
  79         u8      org_data;                               // original LPT data port contents
  80         u8      org_ctrl;                               // original LPT control port contents
  81         u8      cur_ctrl;                               // current control port contents
  82 } Interface;
  83
  84 //***************************************************************************
  85
  86 // ppc_flags
  87
  88 #define fifo_wait                                       0x10
  89
  90 //***************************************************************************
  91
  92 // DONT CHANGE THESE LEST YOU BREAK EVERYTHING - BIT FIELD DEPENDENCIES
  93
  94 #define PPCMODE_UNI_SW          0
  95 #define PPCMODE_UNI_FW          1
  96 #define PPCMODE_BI_SW                   2
  97 #define PPCMODE_BI_FW                   3
  98 #define PPCMODE_EPP_BYTE        4
  99 #define PPCMODE_EPP_WORD        5
 100 #define PPCMODE_EPP_DWORD       6
 101
 102 //***************************************************************************
 103
 104 static int ppc6_select(Interface *ppc);
 105 static void ppc6_deselect(Interface *ppc);
 106 static void ppc6_send_cmd(Interface *ppc, u8 cmd);
 107 static void ppc6_wr_data_byte(Interface *ppc, u8 data);
 108 static u8 ppc6_rd_data_byte(Interface *ppc);
 109 static u8 ppc6_rd_port(Interface *ppc, u8 port);
 110 static void ppc6_wr_port(Interface *ppc, u8 port, u8 data);
 111 static void ppc6_rd_data_blk(Interface *ppc, u8 *data, long count);
 112 static void ppc6_wait_for_fifo(Interface *ppc);
 113 static void ppc6_wr_data_blk(Interface *ppc, u8 *data, long count);
 114 static void ppc6_rd_port16_blk(Interface *ppc, u8 port, u8 *data, long length);
 115 static void ppc6_wr_port16_blk(Interface *ppc, u8 port, u8 *data, long length);
 116 static void ppc6_wr_extout(Interface *ppc, u8 regdata);
 117 static int ppc6_open(Interface *ppc);
 118 static void ppc6_close(Interface *ppc);
 119
 120 //***************************************************************************
 121
 122 static int ppc6_select(Interface *ppc)
 123 {
 124         u8 i, j, k;
 125
 126         i = inb(ppc->lpt_addr + 1);
 127
 128         if (i & 1)
 129                 outb(i, ppc->lpt_addr + 1);
 130
 131         ppc->org_data = inb(ppc->lpt_addr);
 132
 133         ppc->org_ctrl = inb(ppc->lpt_addr + 2) & 0x5F; // readback ctrl
 134
 135         ppc->cur_ctrl = ppc->org_ctrl;
 136
 137         ppc->cur_ctrl |= port_sel;
 138
 139         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 140
 141         if (ppc->org_data == 'b')
 142                 outb('x', ppc->lpt_addr);
 143
 144         outb('b', ppc->lpt_addr);
 145         outb('p', ppc->lpt_addr);
 146         outb(ppc->ppc_id, ppc->lpt_addr);
 147         outb(~ppc->ppc_id,ppc->lpt_addr);
 148
 149         ppc->cur_ctrl &= ~port_sel;
 150
 151         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 152
 153         ppc->cur_ctrl = (ppc->cur_ctrl & port_int) | port_init;
 154
 155         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 156
 157         i = ppc->mode & 0x0C;
 158
 159         if (i == 0)
 160                 i = (ppc->mode & 2) | 1;
 161
 162         outb(i, ppc->lpt_addr);
 163
 164         ppc->cur_ctrl |= port_sel;
 165
 166         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 167
 168         // DELAY
 169
 170         ppc->cur_ctrl |= port_afd;
 171
 172         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 173
 174         j = ((i & 0x08) << 4) | ((i & 0x07) << 3);
 175
 176         k = inb(ppc->lpt_addr + 1) & 0xB8;
 177
 178         if (j == k)
 179         {
 180                 ppc->cur_ctrl &= ~port_afd;
 181
 182                 outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 183
 184                 k = (inb(ppc->lpt_addr + 1) & 0xB8) ^ 0xB8;
 185
 186                 if (j == k)
 187                 {
 188                         if (i & 4)      // EPP
 189                                 ppc->cur_ctrl &= ~(port_sel | port_init);
 190                         else                            // PPC/ECP
 191                                 ppc->cur_ctrl &= ~port_sel;
 192
 193                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 194
 195                         return(1);
 196                 }
 197         }
 198
 199         outb(ppc->org_ctrl, ppc->lpt_addr + 2);
 200
 201         outb(ppc->org_data, ppc->lpt_addr);
 202
 203         return(0); // FAIL
 204 }
 205
 206 //***************************************************************************
 207
 208 static void ppc6_deselect(Interface *ppc)
 209 {
 210         if (ppc->mode & 4)      // EPP
 211                 ppc->cur_ctrl |= port_init;
 212         else                                                            // PPC/ECP
 213                 ppc->cur_ctrl |= port_sel;
 214
 215         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 216
 217         outb(ppc->org_data, ppc->lpt_addr);
 218
 219         outb((ppc->org_ctrl | port_sel), ppc->lpt_addr + 2);
 220
 221         outb(ppc->org_ctrl, ppc->lpt_addr + 2);
 222 }
 223
 224 //***************************************************************************
 225
 226 static void ppc6_send_cmd(Interface *ppc, u8 cmd)
 227 {
 228         switch(ppc->mode)
 229         {
 230                 case PPCMODE_UNI_SW :
 231                 case PPCMODE_UNI_FW :
 232                 case PPCMODE_BI_SW :
 233                 case PPCMODE_BI_FW :
 234                 {
 235                         outb(cmd, ppc->lpt_addr);
 236
 237                         ppc->cur_ctrl ^= cmd_stb;
 238
 239                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 240
 241                         break;
 242                 }
 243
 244                 case PPCMODE_EPP_BYTE :
 245                 case PPCMODE_EPP_WORD :
 246                 case PPCMODE_EPP_DWORD :
 247                 {
 248                         outb(cmd, ppc->lpt_addr + 3);
 249
 250                         break;
 251                 }
 252         }
 253 }
 254
 255 //***************************************************************************
 256
 257 static void ppc6_wr_data_byte(Interface *ppc, u8 data)
 258 {
 259         switch(ppc->mode)
 260         {
 261                 case PPCMODE_UNI_SW :
 262                 case PPCMODE_UNI_FW :
 263                 case PPCMODE_BI_SW :
 264                 case PPCMODE_BI_FW :
 265                 {
 266                         outb(data, ppc->lpt_addr);
 267
 268                         ppc->cur_ctrl ^= data_stb;
 269
 270                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 271
 272                         break;
 273                 }
 274
 275                 case PPCMODE_EPP_BYTE :
 276                 case PPCMODE_EPP_WORD :
 277                 case PPCMODE_EPP_DWORD :
 278                 {
 279                         outb(data, ppc->lpt_addr + 4);
 280
 281                         break;
 282                 }
 283         }
 284 }
 285
 286 //***************************************************************************
 287
 288 static u8 ppc6_rd_data_byte(Interface *ppc)
 289 {
 290         u8 data = 0;
 291
 292         switch(ppc->mode)
 293         {
 294                 case PPCMODE_UNI_SW :
 295                 case PPCMODE_UNI_FW :
 296                 {
 297                         ppc->cur_ctrl = (ppc->cur_ctrl & ~port_stb) ^ data_stb;
 298
 299                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 300
 301                         // DELAY
 302
 303                         data = inb(ppc->lpt_addr + 1);
 304
 305                         data = ((data & 0x80) >> 1) | ((data & 0x38) >> 3);
 306
 307                         ppc->cur_ctrl |= port_stb;
 308
 309                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 310
 311                         // DELAY
 312
 313                         data |= inb(ppc->lpt_addr + 1) & 0xB8;
 314
 315                         break;
 316                 }
 317
 318                 case PPCMODE_BI_SW :
 319                 case PPCMODE_BI_FW :
 320                 {
 321                         ppc->cur_ctrl |= port_dir;
 322
 323                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 324
 325                         ppc->cur_ctrl = (ppc->cur_ctrl | port_stb) ^ data_stb;
 326
 327                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 328
 329                         data = inb(ppc->lpt_addr);
 330
 331                         ppc->cur_ctrl &= ~port_stb;
 332
 333                         outb(ppc->cur_ctrl,ppc->lpt_addr + 2);
 334
 335                         ppc->cur_ctrl &= ~port_dir;
 336
 337                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 338
 339                         break;
 340                 }
 341
 342                 case PPCMODE_EPP_BYTE :
 343                 case PPCMODE_EPP_WORD :
 344                 case PPCMODE_EPP_DWORD :
 345                 {
 346                         outb((ppc->cur_ctrl | port_dir),ppc->lpt_addr + 2);
 347
 348                         data = inb(ppc->lpt_addr + 4);
 349
 350                         outb(ppc->cur_ctrl,ppc->lpt_addr + 2);
 351
 352                         break;
 353                 }
 354         }
 355
 356         return(data);
 357 }
 358
 359 //***************************************************************************
 360
 361 static u8 ppc6_rd_port(Interface *ppc, u8 port)
 362 {
 363         ppc6_send_cmd(ppc,(u8)(port | ACCESS_PORT | ACCESS_READ));
 364
 365         return(ppc6_rd_data_byte(ppc));
 366 }
 367
 368 //***************************************************************************
 369
 370 static void ppc6_wr_port(Interface *ppc, u8 port, u8 data)
 371 {
 372         ppc6_send_cmd(ppc,(u8)(port | ACCESS_PORT | ACCESS_WRITE));
 373
 374         ppc6_wr_data_byte(ppc, data);
 375 }
 376
 377 //***************************************************************************
 378
 379 static void ppc6_rd_data_blk(Interface *ppc, u8 *data, long count)
 380 {
 381         switch(ppc->mode)
 382         {
 383                 case PPCMODE_UNI_SW :
 384                 case PPCMODE_UNI_FW :
 385                 {
 386                         while(count)
 387                         {
 388                                 u8 d;
 389
 390                                 ppc->cur_ctrl = (ppc->cur_ctrl & ~port_stb) ^ data_stb;
 391
 392                                 outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 393
 394                                 // DELAY
 395
 396                                 d = inb(ppc->lpt_addr + 1);
 397
 398                                 d = ((d & 0x80) >> 1) | ((d & 0x38) >> 3);
 399
 400                                 ppc->cur_ctrl |= port_stb;
 401
 402                                 outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 403
 404                                 // DELAY
 405
 406                                 d |= inb(ppc->lpt_addr + 1) & 0xB8;
 407
 408                                 *data++ = d;
 409                                 count--;
 410                         }
 411
 412                         break;
 413                 }
 414
 415                 case PPCMODE_BI_SW :
 416                 case PPCMODE_BI_FW :
 417                 {
 418                         ppc->cur_ctrl |= port_dir;
 419
 420                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 421
 422                         ppc->cur_ctrl |= port_stb;
 423
 424                         while(count)
 425                         {
 426                                 ppc->cur_ctrl ^= data_stb;
 427
 428                                 outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 429
 430                                 *data++ = inb(ppc->lpt_addr);
 431                                 count--;
 432                         }
 433
 434                         ppc->cur_ctrl &= ~port_stb;
 435
 436                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 437
 438                         ppc->cur_ctrl &= ~port_dir;
 439
 440                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 441
 442                         break;
 443                 }
 444
 445                 case PPCMODE_EPP_BYTE :
 446                 {
 447                         outb((ppc->cur_ctrl | port_dir), ppc->lpt_addr + 2);
 448
 449                         // DELAY
 450
 451                         while(count)
 452                         {
 453                                 *data++ = inb(ppc->lpt_addr + 4);
 454                                 count--;
 455                         }
 456
 457                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 458
 459                         break;
 460                 }
 461
 462                 case PPCMODE_EPP_WORD :
 463                 {
 464                         outb((ppc->cur_ctrl | port_dir), ppc->lpt_addr + 2);
 465
 466                         // DELAY
 467
 468                         while(count > 1)
 469                         {
 470                                 *((u16 *)data) = inw(ppc->lpt_addr + 4);
 471                                 data  += 2;
 472                                 count -= 2;
 473                         }
 474
 475                         while(count)
 476                         {
 477                                 *data++ = inb(ppc->lpt_addr + 4);
 478                                 count--;
 479                         }
 480
 481                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 482
 483                         break;
 484                 }
 485
 486                 case PPCMODE_EPP_DWORD :
 487                 {
 488                         outb((ppc->cur_ctrl | port_dir),ppc->lpt_addr + 2);
 489
 490                         // DELAY
 491
 492                         while(count > 3)
 493                         {
 494                                 *((u32 *)data) = inl(ppc->lpt_addr + 4);
 495                                 data  += 4;
 496                                 count -= 4;
 497                         }
 498
 499                         while(count)
 500                         {
 501                                 *data++ = inb(ppc->lpt_addr + 4);
 502                                 count--;
 503                         }
 504
 505                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 506
 507                         break;
 508                 }
 509         }
 510
 511 }
 512
 513 //***************************************************************************
 514
 515 static void ppc6_wait_for_fifo(Interface *ppc)
 516 {
 517         int i;
 518
 519         if (ppc->ppc_flags & fifo_wait)
 520         {
 521                 for(i=0; i<20; i++)
 522                         inb(ppc->lpt_addr + 1);
 523         }
 524 }
 525
 526 //***************************************************************************
 527
 528 static void ppc6_wr_data_blk(Interface *ppc, u8 *data, long count)
 529 {
 530         switch(ppc->mode)
 531         {
 532                 case PPCMODE_UNI_SW :
 533                 case PPCMODE_BI_SW :
 534                 {
 535                         while(count--)
 536                         {
 537                                 outb(*data++, ppc->lpt_addr);
 538
 539                                 ppc->cur_ctrl ^= data_stb;
 540
 541                                 outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 542                         }
 543
 544                         break;
 545                 }
 546
 547                 case PPCMODE_UNI_FW :
 548                 case PPCMODE_BI_FW :
 549                 {
 550                         u8 this, last;
 551
 552                         ppc6_send_cmd(ppc,(CMD_PREFIX_SET | PREFIX_FASTWR));
 553
 554                         ppc->cur_ctrl |= port_stb;
 555
 556                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 557
 558                         last = *data;
 559
 560                         outb(last, ppc->lpt_addr);
 561
 562                         while(count)
 563                         {
 564                                 this = *data++;
 565                                 count--;
 566
 567                                 if (this == last)
 568                                 {
 569                                         ppc->cur_ctrl ^= data_stb;
 570
 571                                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 572                                 }
 573                                 else
 574                                 {
 575                                         outb(this, ppc->lpt_addr);
 576
 577                                         last = this;
 578                                 }
 579                         }
 580
 581                         ppc->cur_ctrl &= ~port_stb;
 582
 583                         outb(ppc->cur_ctrl, ppc->lpt_addr + 2);
 584
 585                         ppc6_send_cmd(ppc,(CMD_PREFIX_RESET | PREFIX_FASTWR));
 586
 587                         break;
 588                 }
 589
 590                 case PPCMODE_EPP_BYTE :
 591                 {
 592                         while(count)
 593                         {
 594                                 outb(*data++,ppc->lpt_addr + 4);
 595                                 count--;
 596                         }
 597
 598                         ppc6_wait_for_fifo(ppc);
 599
 600                         break;
 601                 }
 602
 603                 case PPCMODE_EPP_WORD :
 604                 {
 605                         while(count > 1)
 606                         {
 607                                 outw(*((u16 *)data),ppc->lpt_addr + 4);
 608                                 data  += 2;
 609                                 count -= 2;
 610                         }
 611
 612                         while(count)
 613                         {
 614                                 outb(*data++,ppc->lpt_addr + 4);
 615                                 count--;
 616                         }
 617
 618                         ppc6_wait_for_fifo(ppc);
 619
 620                         break;
 621                 }
 622
 623                 case PPCMODE_EPP_DWORD :
 624                 {
 625                         while(count > 3)
 626                         {
 627                                 outl(*((u32 *)data),ppc->lpt_addr + 4);
 628                                 data  += 4;
 629                                 count -= 4;
 630                         }
 631
 632                         while(count)
 633                         {
 634                                 outb(*data++,ppc->lpt_addr + 4);
 635                                 count--;
 636                         }
 637
 638                         ppc6_wait_for_fifo(ppc);
 639
 640                         break;
 641                 }
 642         }
 643 }
 644
 645 //***************************************************************************
 646
 647 static void ppc6_rd_port16_blk(Interface *ppc, u8 port, u8 *data, long length)
 648 {
 649         length = length << 1;
 650
 651         ppc6_send_cmd(ppc, (REG_BLKSIZE | ACCESS_REG | ACCESS_WRITE));
 652         ppc6_wr_data_byte(ppc,(u8)length);
 653         ppc6_wr_data_byte(ppc,(u8)(length >> 8));
 654         ppc6_wr_data_byte(ppc,0);
 655
 656         ppc6_send_cmd(ppc, (CMD_PREFIX_SET | PREFIX_IO16 | PREFIX_BLK));
 657
 658         ppc6_send_cmd(ppc, (u8)(port | ACCESS_PORT | ACCESS_READ));
 659
 660         ppc6_rd_data_blk(ppc, data, length);
 661
 662         ppc6_send_cmd(ppc, (CMD_PREFIX_RESET | PREFIX_IO16 | PREFIX_BLK));
 663 }
 664
 665 //***************************************************************************
 666
 667 static void ppc6_wr_port16_blk(Interface *ppc, u8 port, u8 *data, long length)
 668 {
 669         length = length << 1;
 670
 671         ppc6_send_cmd(ppc, (REG_BLKSIZE | ACCESS_REG | ACCESS_WRITE));
 672         ppc6_wr_data_byte(ppc,(u8)length);
 673         ppc6_wr_data_byte(ppc,(u8)(length >> 8));
 674         ppc6_wr_data_byte(ppc,0);
 675
 676         ppc6_send_cmd(ppc, (CMD_PREFIX_SET | PREFIX_IO16 | PREFIX_BLK));
 677
 678         ppc6_send_cmd(ppc, (u8)(port | ACCESS_PORT | ACCESS_WRITE));
 679
 680         ppc6_wr_data_blk(ppc, data, length);
 681
 682         ppc6_send_cmd(ppc, (CMD_PREFIX_RESET | PREFIX_IO16 | PREFIX_BLK));
 683 }
 684
 685 //***************************************************************************
 686
 687 static void ppc6_wr_extout(Interface *ppc, u8 regdata)
 688 {
 689         ppc6_send_cmd(ppc,(REG_VERSION | ACCESS_REG | ACCESS_WRITE));
 690
 691         ppc6_wr_data_byte(ppc, (u8)((regdata & 0x03) << 6));
 692 }
 693
 694 //***************************************************************************
 695
 696 static int ppc6_open(Interface *ppc)
 697 {
 698         int ret;
 699
 700         ret = ppc6_select(ppc);
 701
 702         if (ret == 0)
 703                 return(ret);
 704
 705         ppc->ppc_flags &= ~fifo_wait;
 706
 707         ppc6_send_cmd(ppc, (ACCESS_REG | ACCESS_WRITE | REG_RAMSIZE));
 708         ppc6_wr_data_byte(ppc, RAMSIZE_128K);
 709
 710         ppc6_send_cmd(ppc, (ACCESS_REG | ACCESS_READ | REG_VERSION));
 711
 712         if ((ppc6_rd_data_byte(ppc) & 0x3F) == 0x0C)
 713                 ppc->ppc_flags |= fifo_wait;
 714
 715         return(ret);
 716 }
 717
 718 //***************************************************************************
 719
 720 static void ppc6_close(Interface *ppc)
 721 {
 722         ppc6_deselect(ppc);
 723 }
 724
 725 //***************************************************************************
 726