immio.c revision 39520
1/*- 2 * Copyright (c) 1998 Nicolas Souchu 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $Id: immio.c,v 1.1 1998/09/13 18:28:15 nsouch Exp $ 27 * 28 */ 29 30/* 31 * Iomega ZIP+ Matchmaker Parallel Port Interface driver 32 * 33 * Thanks to David Campbell work on the Linux driver and the Iomega specs 34 * Thanks to Thiebault Moeglin for the drive 35 */ 36#ifdef KERNEL 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/malloc.h> 40#include <sys/buf.h> 41 42#include <machine/clock.h> 43 44#endif /* KERNEL */ 45 46#ifdef KERNEL 47#include <sys/kernel.h> 48#endif /*KERNEL */ 49 50#include <dev/ppbus/ppbconf.h> 51#include <dev/ppbus/ppb_msq.h> 52#include <dev/ppbus/vpoio.h> 53#include <dev/ppbus/ppb_1284.h> 54 55#define VP0_SELTMO 5000 /* select timeout */ 56#define VP0_FAST_SPINTMO 500000 /* wait status timeout */ 57#define VP0_LOW_SPINTMO 5000000 /* wait status timeout */ 58 59#define VP0_SECTOR_SIZE 512 60 61/* 62 * Microcode to execute very fast I/O sequences at the lowest bus level. 63 */ 64 65#define SELECT_TARGET MS_PARAM(6, 1, MS_TYP_CHA) 66 67#define DECLARE_SELECT_MICROSEQUENCE \ 68struct ppb_microseq select_microseq[] = { \ 69 MS_CASS(0xc), \ 70 /* first, check there is nothing holding onto the bus */ \ 71 MS_SET(VP0_SELTMO), \ 72/* _loop: */ \ 73 MS_BRCLEAR(0x8, 3 /* _ready */), \ 74 MS_DBRA(-1 /* _loop */), \ 75 MS_RET(2), /* bus busy */ \ 76/* _ready: */ \ 77 MS_CASS(0x4), \ 78 MS_DASS(MS_UNKNOWN /* 0x80 | 1 << target */), \ 79 MS_DELAY(1), \ 80 MS_CASS(0xc), \ 81 MS_CASS(0xd), \ 82 /* now, wait until the drive is ready */ \ 83 MS_SET(VP0_SELTMO), \ 84/* loop: */ \ 85 MS_BRSET(0x8, 4 /* ready */), \ 86 MS_DBRA(-1 /* loop */), \ 87/* error: */ \ 88 MS_CASS(0xc), \ 89 MS_RET(VP0_ESELECT_TIMEOUT), \ 90/* ready: */ \ 91 MS_CASS(0xc), \ 92 MS_RET(0) \ 93} 94 95static struct ppb_microseq transfer_epilog[] = { 96 MS_CASS(0x4), 97 MS_CASS(0xc), 98 MS_CASS(0xe), 99 MS_CASS(0x4), 100 MS_RET(0) 101}; 102 103#define CPP_S1 MS_PARAM(10, 2, MS_TYP_PTR) 104#define CPP_S2 MS_PARAM(13, 2, MS_TYP_PTR) 105#define CPP_S3 MS_PARAM(16, 2, MS_TYP_PTR) 106#define CPP_PARAM MS_PARAM(17, 1, MS_TYP_CHA) 107 108#define DECLARE_CPP_MICROSEQ \ 109struct ppb_microseq cpp_microseq[] = { \ 110 MS_CASS(0x0c), MS_DELAY(2), \ 111 MS_DASS(0xaa), MS_DELAY(10), \ 112 MS_DASS(0x55), MS_DELAY(10), \ 113 MS_DASS(0x00), MS_DELAY(10), \ 114 MS_DASS(0xff), MS_DELAY(10), \ 115 MS_RFETCH(MS_REG_STR, 0xb8, MS_UNKNOWN /* &s1 */), \ 116 MS_DASS(0x87), MS_DELAY(10), \ 117 MS_RFETCH(MS_REG_STR, 0xb8, MS_UNKNOWN /* &s2 */), \ 118 MS_DASS(0x78), MS_DELAY(10), \ 119 MS_RFETCH(MS_REG_STR, 0x38, MS_UNKNOWN /* &s3 */), \ 120 MS_DASS(MS_UNKNOWN /* param */), \ 121 MS_DELAY(2), \ 122 MS_CASS(0x0c), MS_DELAY(10), \ 123 MS_CASS(0x0d), MS_DELAY(2), \ 124 MS_CASS(0x0c), MS_DELAY(10), \ 125 MS_DASS(0xff), MS_DELAY(10), \ 126 MS_RET(0) \ 127} 128 129#define NEGOCIATED_MODE MS_PARAM(2, 1, MS_TYP_CHA) 130 131#define DECLARE_NEGOCIATE_MICROSEQ \ 132static struct ppb_microseq negociate_microseq[] = { \ 133 MS_CASS(0x4), \ 134 MS_DELAY(5), \ 135 MS_DASS(MS_UNKNOWN /* mode */), \ 136 MS_DELAY(100), \ 137 MS_CASS(0x6), \ 138 MS_DELAY(5), \ 139 MS_BRSET(0x20, 6 /* continue */), \ 140 MS_DELAY(5), \ 141 MS_CASS(0x7), \ 142 MS_DELAY(5), \ 143 MS_CASS(0x6), \ 144 MS_RET(VP0_ENEGOCIATE), \ 145/* continue: */ \ 146 MS_DELAY(5), \ 147 MS_CASS(0x7), \ 148 MS_DELAY(5), \ 149 MS_CASS(0x6), \ 150 MS_RET(0) \ 151} 152 153static struct ppb_microseq reset_microseq[] = { 154 MS_CASS(0x04), 155 MS_DASS(0x40), 156 MS_DELAY(1), 157 MS_CASS(0x0c), 158 MS_CASS(0x0d), 159 MS_DELAY(50), 160 MS_CASS(0x0c), 161 MS_CASS(0x04), 162 MS_RET(0) 163}; 164 165/* 166 * nibble_inbyte_hook() 167 * 168 * Formats high and low nibble into a character 169 */ 170static int 171nibble_inbyte_hook (void *p, char *ptr) 172{ 173 struct vpo_nibble *s = (struct vpo_nibble *)p; 174 175 /* increment the buffer pointer */ 176 *ptr = ((s->l >> 4) & 0x0f) + (s->h & 0xf0); 177 178 return (0); 179} 180 181/* 182 * Macro used to initialize each vpoio_data structure during 183 * low level attachment 184 * 185 * XXX should be converted to ppb_MS_init_msq() 186 */ 187#define INIT_NIBBLE_INBYTE_SUBMICROSEQ(vpo) { \ 188 (vpo)->vpo_nibble_inbyte_msq[6].arg[2].p = \ 189 (void *)&(vpo)->vpo_nibble.h; \ 190 (vpo)->vpo_nibble_inbyte_msq[3].arg[2].p = \ 191 (void *)&(vpo)->vpo_nibble.l; \ 192 (vpo)->vpo_nibble_inbyte_msq[9].arg[0].f = \ 193 nibble_inbyte_hook; \ 194 (vpo)->vpo_nibble_inbyte_msq[9].arg[1].p = \ 195 (void *)&(vpo)->vpo_nibble; \ 196} 197 198/* 199 * This is the sub-microseqence for MS_GET in NIBBLE mode 200 * Retrieve the two nibbles and call the C function to generate the character 201 * and store it in the buffer (see nibble_inbyte_hook()) 202 */ 203static struct ppb_microseq nibble_inbyte_submicroseq[] = { 204 MS_CASS(0x4), 205 206/* loop: */ 207 MS_CASS(0x6), 208 MS_DELAY(1), 209 MS_RFETCH(MS_REG_STR, MS_FETCH_ALL, MS_UNKNOWN /* low nibble */), 210 MS_CASS(0x5), 211 MS_DELAY(1), 212 MS_RFETCH(MS_REG_STR, MS_FETCH_ALL, MS_UNKNOWN /* high nibble */), 213 MS_CASS(0x4), 214 MS_DELAY(1), 215 216 /* do a C call to format the received nibbles */ 217 MS_C_CALL(MS_UNKNOWN /* C hook */, MS_UNKNOWN /* param */), 218 MS_DBRA(-6 /* loop */), 219 MS_RET(0) 220}; 221 222/* 223 * This is the sub-microseqence for MS_GET in PS2 mode 224 */ 225static struct ppb_microseq ps2_inbyte_submicroseq[] = { 226 MS_CASS(0x4), 227 228/* loop: */ 229 MS_CASS(PCD | 0x6), 230 MS_RFETCH_P(1, MS_REG_DTR, MS_FETCH_ALL), 231 MS_CASS(PCD | 0x5), 232 MS_DBRA(-3 /* loop */), 233 234 MS_RET(0) 235}; 236 237/* 238 * This is the sub-microsequence for MS_PUT in both NIBBLE and PS2 modes 239 */ 240static struct ppb_microseq spp_outbyte_submicroseq[] = { 241 MS_CASS(0x4), 242 243/* loop: */ 244 MS_RASSERT_P(1, MS_REG_DTR), 245 MS_CASS(0x5), 246 MS_DBRA(1), /* decrement counter */ 247 MS_RASSERT_P(1, MS_REG_DTR), 248 MS_CASS(0x0), 249 MS_DBRA(-5 /* loop */), 250 251 /* return from the put call */ 252 MS_CASS(0x4), 253 MS_RET(0) 254}; 255 256/* EPP 1.7 microsequences, ptr and len set at runtime */ 257static struct ppb_microseq epp17_outstr[] = { 258 MS_CASS(0x4), 259 MS_RASSERT_P(MS_ACCUM, MS_REG_EPP), 260 MS_CASS(0xc), 261 MS_RET(0), 262}; 263 264static struct ppb_microseq epp17_instr[] = { 265 MS_CASS(PCD | 0x4), 266 MS_RFETCH_P(MS_ACCUM, MS_REG_EPP, MS_FETCH_ALL), 267 MS_CASS(PCD | 0xc), 268 MS_RET(0), 269}; 270 271static int 272imm_disconnect(struct vpoio_data *vpo, int *connected, int release_bus) 273{ 274 DECLARE_CPP_MICROSEQ; 275 276 char s1, s2, s3; 277 int ret; 278 279 /* all should be ok */ 280 if (connected) 281 *connected = 0; 282 283 ppb_MS_init_msq(cpp_microseq, 4, CPP_S1, (void *)&s1, 284 CPP_S2, (void *)&s2, CPP_S3, (void *)&s3, 285 CPP_PARAM, 0x30); 286 287 ppb_MS_microseq(&vpo->vpo_dev, cpp_microseq, &ret); 288 289 if ((s1 != (char)0xb8 || s2 != (char)0x18 || s3 != (char)0x38) && 290 connected) 291 *connected = VP0_ECONNECT; 292 293 if (release_bus) 294 return (ppb_release_bus(&vpo->vpo_dev)); 295 else 296 return (0); 297} 298 299/* 300 * how : PPB_WAIT or PPB_DONTWAIT 301 */ 302static int 303imm_connect(struct vpoio_data *vpo, int how, int *disconnected, int request_bus) 304{ 305 DECLARE_CPP_MICROSEQ; 306 307 char s1, s2, s3; 308 int error; 309 int ret; 310 311 /* all should be ok */ 312 if (disconnected) 313 *disconnected = 0; 314 315 if (request_bus) 316 if ((error = ppb_request_bus(&vpo->vpo_dev, how))) 317 return (error); 318 319 ppb_MS_init_msq(cpp_microseq, 3, CPP_S1, (void *)&s1, 320 CPP_S2, (void *)&s2, CPP_S3, (void *)&s3); 321 322 /* select device 0 in compatible mode */ 323 ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0xe0); 324 ppb_MS_microseq(&vpo->vpo_dev, cpp_microseq, &ret); 325 326 /* disconnect all devices */ 327 ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0x30); 328 ppb_MS_microseq(&vpo->vpo_dev, cpp_microseq, &ret); 329 330 if (PPB_IN_EPP_MODE(&vpo->vpo_dev)) 331 ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0x28); 332 else 333 ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0xe0); 334 335 ppb_MS_microseq(&vpo->vpo_dev, cpp_microseq, &ret); 336 337 if ((s1 != (char)0xb8 || s2 != (char)0x18 || s3 != (char)0x30) 338 && disconnected) 339 *disconnected = VP0_ECONNECT; 340 341 return (0); 342} 343 344/* 345 * imm_detect() 346 * 347 * Detect and initialise the VP0 adapter. 348 */ 349static int 350imm_detect(struct vpoio_data *vpo) 351{ 352 int error; 353 354 if ((error = ppb_request_bus(&vpo->vpo_dev, PPB_DONTWAIT))) 355 return (error); 356 357 /* disconnect the drive, keep the bus */ 358 imm_disconnect(vpo, NULL, 0); 359 360 /* we already have the bus, just connect */ 361 imm_connect(vpo, PPB_DONTWAIT, &error, 0); 362 363 if (error) { 364 if (bootverbose) 365 printf("imm%d: can't connect to the drive\n", 366 vpo->vpo_unit); 367 goto error; 368 } 369 370 /* send SCSI reset signal */ 371 ppb_MS_microseq(&vpo->vpo_dev, reset_microseq, NULL); 372 373 /* release the bus now */ 374 imm_disconnect(vpo, &error, 1); 375 376 /* ensure we are disconnected or daisy chained peripheral 377 * may cause serious problem to the disk */ 378 379 if (error) { 380 if (bootverbose) 381 printf("imm%d: can't disconnect from the drive\n", 382 vpo->vpo_unit); 383 } 384 385 return (0); 386 387error: 388 ppb_release_bus(&vpo->vpo_dev); 389 return (VP0_EINITFAILED); 390} 391 392/* 393 * imm_outstr() 394 */ 395static int 396imm_outstr(struct vpoio_data *vpo, char *buffer, int size) 397{ 398 int error = 0; 399 400 if (PPB_IN_EPP_MODE(&vpo->vpo_dev)) 401 ppb_reset_epp_timeout(&vpo->vpo_dev); 402 403 ppb_MS_exec(&vpo->vpo_dev, MS_OP_PUT, buffer, size, MS_UNKNOWN, &error); 404 405 return (error); 406} 407 408/* 409 * imm_instr() 410 */ 411static int 412imm_instr(struct vpoio_data *vpo, char *buffer, int size) 413{ 414 int error = 0; 415 416 if (PPB_IN_EPP_MODE(&vpo->vpo_dev)) 417 ppb_reset_epp_timeout(&vpo->vpo_dev); 418 419 ppb_MS_exec(&vpo->vpo_dev, MS_OP_GET, buffer, size, MS_UNKNOWN, &error); 420 421 return (error); 422} 423 424static char 425imm_select(struct vpoio_data *vpo, int initiator, int target) 426{ 427 DECLARE_SELECT_MICROSEQUENCE; 428 int ret; 429 430 /* initialize the select microsequence */ 431 ppb_MS_init_msq(select_microseq, 1, 432 SELECT_TARGET, 1 << initiator | 1 << target); 433 434 ppb_MS_microseq(&vpo->vpo_dev, select_microseq, &ret); 435 436 return (ret); 437} 438 439/* 440 * imm_wait() 441 * 442 * H_SELIN must be low. 443 * 444 * XXX should be ported to microseq 445 */ 446static char 447imm_wait(struct vpoio_data *vpo, int tmo) 448{ 449 450 register int k; 451 register char r; 452 453 ppb_wctr(&vpo->vpo_dev, 0xc); 454 455 /* XXX should be ported to microseq */ 456 k = 0; 457 while (!((r = ppb_rstr(&vpo->vpo_dev)) & 0x80) && (k++ < tmo)) 458 DELAY(1); 459 460 /* 461 * Return some status information. 462 * Semantics : 0x88 = ZIP+ wants more data 463 * 0x98 = ZIP+ wants to send more data 464 * 0xa8 = ZIP+ wants command 465 * 0xb8 = end of transfer, ZIP+ is sending status 466 */ 467 ppb_wctr(&vpo->vpo_dev, 0x4); 468 if (k < tmo) 469 return (r & 0xb8); 470 471 return (0); /* command timed out */ 472} 473 474static int 475imm_negociate(struct vpoio_data *vpo) 476{ 477 DECLARE_NEGOCIATE_MICROSEQ; 478 int negociate_mode; 479 int ret; 480 481 if (PPB_IN_NIBBLE_MODE(&vpo->vpo_dev)) 482 negociate_mode = 0; 483 else if (PPB_IN_PS2_MODE(&vpo->vpo_dev)) 484 negociate_mode = 1; 485 else 486 return (0); 487 488#if 0 /* XXX use standalone code not to depend on ppb_1284 code yet */ 489 ret = ppb_1284_negociate(&vpo->vpo_dev, negociate_mode); 490 491 if (ret) 492 return (VP0_ENEGOCIATE); 493#endif 494 495 ppb_MS_init_msq(negociate_microseq, 1, NEGOCIATED_MODE, negociate_mode); 496 497 ppb_MS_microseq(&vpo->vpo_dev, negociate_microseq, &ret); 498 499 return (ret); 500} 501 502/* 503 * imm_probe() 504 * 505 * Low level probe of vpo device 506 * 507 */ 508struct ppb_device * 509imm_probe(struct ppb_data *ppb, struct vpoio_data *vpo) 510{ 511 512 /* ppbus dependent initialisation */ 513 vpo->vpo_dev.id_unit = vpo->vpo_unit; 514 vpo->vpo_dev.name = "vpo"; 515 vpo->vpo_dev.ppb = ppb; 516 517 /* now, try to initialise the drive */ 518 if (imm_detect(vpo)) { 519 return (NULL); 520 } 521 522 return (&vpo->vpo_dev); 523} 524 525/* 526 * imm_attach() 527 * 528 * Low level attachment of vpo device 529 * 530 */ 531int 532imm_attach(struct vpoio_data *vpo) 533{ 534 int epp; 535 536 /* 537 * Report ourselves 538 */ 539 printf("imm%d: <Iomega Matchmaker Parallel to SCSI interface> on ppbus %d\n", 540 vpo->vpo_dev.id_unit, vpo->vpo_dev.ppb->ppb_link->adapter_unit); 541 542 /* 543 * Initialize microsequence code 544 */ 545 vpo->vpo_nibble_inbyte_msq = (struct ppb_microseq *)malloc( 546 sizeof(nibble_inbyte_submicroseq), M_DEVBUF, M_NOWAIT); 547 548 if (!vpo->vpo_nibble_inbyte_msq) 549 return (0); 550 551 bcopy((void *)nibble_inbyte_submicroseq, 552 (void *)vpo->vpo_nibble_inbyte_msq, 553 sizeof(nibble_inbyte_submicroseq)); 554 555 INIT_NIBBLE_INBYTE_SUBMICROSEQ(vpo); 556 557 /* 558 * Initialize mode dependent in/out microsequences 559 */ 560 ppb_request_bus(&vpo->vpo_dev, PPB_WAIT); 561 562 /* enter NIBBLE mode to configure submsq */ 563 if (ppb_set_mode(&vpo->vpo_dev, PPB_NIBBLE) != -1) { 564 565 ppb_MS_GET_init(&vpo->vpo_dev, vpo->vpo_nibble_inbyte_msq); 566 ppb_MS_PUT_init(&vpo->vpo_dev, spp_outbyte_submicroseq); 567 } 568 569 /* enter PS2 mode to configure submsq */ 570 if (ppb_set_mode(&vpo->vpo_dev, PPB_PS2) != -1) { 571 572 ppb_MS_GET_init(&vpo->vpo_dev, ps2_inbyte_submicroseq); 573 ppb_MS_PUT_init(&vpo->vpo_dev, spp_outbyte_submicroseq); 574 } 575 576 epp = ppb_get_epp_protocol(&vpo->vpo_dev); 577 578 /* enter EPP mode to configure submsq */ 579 if (ppb_set_mode(&vpo->vpo_dev, PPB_EPP) != -1) { 580 581 switch (epp) { 582 case EPP_1_9: 583 case EPP_1_7: 584 ppb_MS_GET_init(&vpo->vpo_dev, epp17_instr); 585 ppb_MS_PUT_init(&vpo->vpo_dev, epp17_outstr); 586 break; 587 default: 588 panic("%s: unknown EPP protocol (0x%x)", __FUNCTION__, 589 epp); 590 } 591 } 592 593 /* try to enter EPP or PS/2 mode, NIBBLE otherwise */ 594 if (ppb_set_mode(&vpo->vpo_dev, PPB_EPP) != -1) { 595 switch (epp) { 596 case EPP_1_9: 597 printf("imm%d: EPP 1.9 mode\n", vpo->vpo_unit); 598 break; 599 case EPP_1_7: 600 printf("imm%d: EPP 1.7 mode\n", vpo->vpo_unit); 601 break; 602 default: 603 panic("%s: unknown EPP protocol (0x%x)", __FUNCTION__, 604 epp); 605 } 606 } else if (ppb_set_mode(&vpo->vpo_dev, PPB_PS2) != -1) 607 printf("imm%d: PS2 mode\n", vpo->vpo_unit); 608 609 else if (ppb_set_mode(&vpo->vpo_dev, PPB_NIBBLE) != -1) 610 printf("imm%d: NIBBLE mode\n", vpo->vpo_unit); 611 612 else { 613 printf("imm%d: can't enter NIBBLE, PS2 or EPP mode\n", 614 vpo->vpo_unit); 615 616 ppb_release_bus(&vpo->vpo_dev); 617 618 free(vpo->vpo_nibble_inbyte_msq, M_DEVBUF); 619 return (0); 620 } 621 622 ppb_release_bus(&vpo->vpo_dev); 623 624 return (1); 625} 626 627/* 628 * imm_reset_bus() 629 * 630 */ 631int 632imm_reset_bus(struct vpoio_data *vpo) 633{ 634 int disconnected; 635 636 /* first, connect to the drive and request the bus */ 637 imm_connect(vpo, PPB_WAIT|PPB_INTR, &disconnected, 1); 638 639 if (!disconnected) { 640 641 /* reset the SCSI bus */ 642 ppb_MS_microseq(&vpo->vpo_dev, reset_microseq, NULL); 643 644 /* then disconnect */ 645 imm_disconnect(vpo, NULL, 1); 646 } 647 648 return (0); 649} 650 651/* 652 * imm_do_scsi() 653 * 654 * Send an SCSI command 655 * 656 */ 657int 658imm_do_scsi(struct vpoio_data *vpo, int host, int target, char *command, 659 int clen, char *buffer, int blen, int *result, int *count, 660 int *ret) 661{ 662 663 register char r; 664 char l, h = 0; 665 int len, error = 0, not_connected = 0; 666 register int k; 667 int negociated = 0; 668 669 /* 670 * enter disk state, allocate the ppbus 671 * 672 * XXX 673 * Should we allow this call to be interruptible? 674 * The only way to report the interruption is to return 675 * EIO do upper SCSI code :^( 676 */ 677 if ((error = imm_connect(vpo, PPB_WAIT|PPB_INTR, ¬_connected, 1))) 678 return (error); 679 680 if (not_connected) { 681 *ret = VP0_ECONNECT; goto error; 682 } 683 684 /* 685 * Select the drive ... 686 */ 687 if ((*ret = imm_select(vpo,host,target))) 688 goto error; 689 690 /* 691 * Send the command ... 692 */ 693 for (k = 0; k < clen; k+=2) { 694 if (imm_wait(vpo, VP0_FAST_SPINTMO) != (char)0xa8) { 695 *ret = VP0_ECMD_TIMEOUT; 696 goto error; 697 } 698 if (imm_outstr(vpo, &command[k], 2)) { 699 *ret = VP0_EPPDATA_TIMEOUT; 700 goto error; 701 } 702 } 703 704 if (!(r = imm_wait(vpo, VP0_LOW_SPINTMO))) { 705 *ret = VP0_ESTATUS_TIMEOUT; goto error; 706 } 707 708 if ((r & 0x30) == 0x10) { 709 if (imm_negociate(vpo)) { 710 *ret = VP0_ENEGOCIATE; 711 goto error; 712 } else 713 negociated = 1; 714 } 715 716 /* 717 * Complete transfer ... 718 */ 719 *count = 0; 720 for (;;) { 721 722 if (!(r = imm_wait(vpo, VP0_LOW_SPINTMO))) { 723 *ret = VP0_ESTATUS_TIMEOUT; goto error; 724 } 725 726 /* stop when the ZIP+ wants to send status */ 727 if (r == (char)0xb8) 728 break; 729 730 if (*count >= blen) { 731 *ret = VP0_EDATA_OVERFLOW; 732 goto error; 733 } 734 735 /* ZIP+ wants to send data? */ 736 if (r == (char)0x88) { 737 len = (((blen - *count) >= VP0_SECTOR_SIZE)) ? 738 VP0_SECTOR_SIZE : 2; 739 740 error = imm_outstr(vpo, &buffer[*count], len); 741 } else { 742 if (!PPB_IN_EPP_MODE(&vpo->vpo_dev)) 743 len = 1; 744 else 745 len = (((blen - *count) >= VP0_SECTOR_SIZE)) ? 746 VP0_SECTOR_SIZE : 1; 747 748 error = imm_instr(vpo, &buffer[*count], len); 749 } 750 751 if (error) { 752 *ret = error; 753 goto error; 754 } 755 756 *count += len; 757 } 758 759 if ((PPB_IN_NIBBLE_MODE(&vpo->vpo_dev) || 760 PPB_IN_PS2_MODE(&vpo->vpo_dev)) && negociated) 761 ppb_MS_microseq(&vpo->vpo_dev, transfer_epilog, NULL); 762 763 /* 764 * Retrieve status ... 765 */ 766 if (imm_negociate(vpo)) { 767 *ret = VP0_ENEGOCIATE; 768 goto error; 769 } else 770 negociated = 1; 771 772 if (imm_instr(vpo, &l, 1)) { 773 *ret = VP0_EOTHER; goto error; 774 } 775 776 /* check if the ZIP+ wants to send more status */ 777 if (imm_wait(vpo, VP0_FAST_SPINTMO) == (char)0xb8) 778 if (imm_instr(vpo, &h, 1)) { 779 *ret = VP0_EOTHER+2; goto error; 780 } 781 782 *result = ((int) h << 8) | ((int) l & 0xff); 783 784error: 785 if ((PPB_IN_NIBBLE_MODE(&vpo->vpo_dev) || 786 PPB_IN_PS2_MODE(&vpo->vpo_dev)) && negociated) 787 ppb_MS_microseq(&vpo->vpo_dev, transfer_epilog, NULL); 788 789 /* return to printer state, release the ppbus */ 790 imm_disconnect(vpo, NULL, 1); 791 792 return (0); 793} 794