immio.c revision 71633
1/*- 2 * Copyright (c) 1998, 1999 Nicolas Souchu 3 * Copyright (c) 2001 Alcove - Nicolas Souchu 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: head/sys/dev/ppbus/immio.c 71633 2001-01-25 13:07:55Z nsouch $ 28 * 29 */ 30 31/* 32 * Iomega ZIP+ Matchmaker Parallel Port Interface driver 33 * 34 * Thanks to David Campbell work on the Linux driver and the Iomega specs 35 * Thanks to Thiebault Moeglin for the drive 36 */ 37#ifdef _KERNEL 38#include <sys/param.h> 39#include <sys/systm.h> 40#include <sys/module.h> 41#include <sys/bus.h> 42#include <sys/malloc.h> 43 44 45#endif /* _KERNEL */ 46 47#ifdef _KERNEL 48#endif /* _KERNEL */ 49 50#include "opt_vpo.h" 51 52#include <dev/ppbus/ppbio.h> 53#include <dev/ppbus/ppbconf.h> 54#include <dev/ppbus/ppb_msq.h> 55#include <dev/ppbus/vpoio.h> 56#include <dev/ppbus/ppb_1284.h> 57 58#include "ppbus_if.h" 59 60#define VP0_SELTMO 5000 /* select timeout */ 61#define VP0_FAST_SPINTMO 500000 /* wait status timeout */ 62#define VP0_LOW_SPINTMO 5000000 /* wait status timeout */ 63 64#define VP0_SECTOR_SIZE 512 65 66/* 67 * Microcode to execute very fast I/O sequences at the lowest bus level. 68 */ 69 70#define SELECT_TARGET MS_PARAM(6, 1, MS_TYP_CHA) 71 72#define DECLARE_SELECT_MICROSEQUENCE \ 73struct ppb_microseq select_microseq[] = { \ 74 MS_CASS(0xc), \ 75 /* first, check there is nothing holding onto the bus */ \ 76 MS_SET(VP0_SELTMO), \ 77/* _loop: */ \ 78 MS_BRCLEAR(0x8, 2 /* _ready */), \ 79 MS_DBRA(-2 /* _loop */), \ 80 MS_RET(2), /* bus busy */ \ 81/* _ready: */ \ 82 MS_CASS(0x4), \ 83 MS_DASS(MS_UNKNOWN /* 0x80 | 1 << target */), \ 84 MS_DELAY(1), \ 85 MS_CASS(0xc), \ 86 MS_CASS(0xd), \ 87 /* now, wait until the drive is ready */ \ 88 MS_SET(VP0_SELTMO), \ 89/* loop: */ \ 90 MS_BRSET(0x8, 3 /* ready */), \ 91 MS_DBRA(-2 /* loop */), \ 92/* error: */ \ 93 MS_CASS(0xc), \ 94 MS_RET(VP0_ESELECT_TIMEOUT), \ 95/* ready: */ \ 96 MS_CASS(0xc), \ 97 MS_RET(0) \ 98} 99 100static struct ppb_microseq transfer_epilog[] = { 101 MS_CASS(0x4), 102 MS_CASS(0xc), 103 MS_CASS(0xe), 104 MS_CASS(0x4), 105 MS_RET(0) 106}; 107 108#define CPP_S1 MS_PARAM(10, 2, MS_TYP_PTR) 109#define CPP_S2 MS_PARAM(13, 2, MS_TYP_PTR) 110#define CPP_S3 MS_PARAM(16, 2, MS_TYP_PTR) 111#define CPP_PARAM MS_PARAM(17, 1, MS_TYP_CHA) 112 113#define DECLARE_CPP_MICROSEQ \ 114struct ppb_microseq cpp_microseq[] = { \ 115 MS_CASS(0x0c), MS_DELAY(2), \ 116 MS_DASS(0xaa), MS_DELAY(10), \ 117 MS_DASS(0x55), MS_DELAY(10), \ 118 MS_DASS(0x00), MS_DELAY(10), \ 119 MS_DASS(0xff), MS_DELAY(10), \ 120 MS_RFETCH(MS_REG_STR, 0xb8, MS_UNKNOWN /* &s1 */), \ 121 MS_DASS(0x87), MS_DELAY(10), \ 122 MS_RFETCH(MS_REG_STR, 0xb8, MS_UNKNOWN /* &s2 */), \ 123 MS_DASS(0x78), MS_DELAY(10), \ 124 MS_RFETCH(MS_REG_STR, 0x38, MS_UNKNOWN /* &s3 */), \ 125 MS_DASS(MS_UNKNOWN /* param */), \ 126 MS_DELAY(2), \ 127 MS_CASS(0x0c), MS_DELAY(10), \ 128 MS_CASS(0x0d), MS_DELAY(2), \ 129 MS_CASS(0x0c), MS_DELAY(10), \ 130 MS_DASS(0xff), MS_DELAY(10), \ 131 MS_RET(0) \ 132} 133 134#define NEGOCIATED_MODE MS_PARAM(2, 1, MS_TYP_CHA) 135 136#define DECLARE_NEGOCIATE_MICROSEQ \ 137static struct ppb_microseq negociate_microseq[] = { \ 138 MS_CASS(0x4), \ 139 MS_DELAY(5), \ 140 MS_DASS(MS_UNKNOWN /* mode */), \ 141 MS_DELAY(100), \ 142 MS_CASS(0x6), \ 143 MS_DELAY(5), \ 144 MS_BRSET(0x20, 5 /* continue */), \ 145 MS_DELAY(5), \ 146 MS_CASS(0x7), \ 147 MS_DELAY(5), \ 148 MS_CASS(0x6), \ 149 MS_RET(VP0_ENEGOCIATE), \ 150/* continue: */ \ 151 MS_DELAY(5), \ 152 MS_CASS(0x7), \ 153 MS_DELAY(5), \ 154 MS_CASS(0x6), \ 155 MS_RET(0) \ 156} 157 158static struct ppb_microseq reset_microseq[] = { 159 MS_CASS(0x04), 160 MS_DASS(0x40), 161 MS_DELAY(1), 162 MS_CASS(0x0c), 163 MS_CASS(0x0d), 164 MS_DELAY(50), 165 MS_CASS(0x0c), 166 MS_CASS(0x04), 167 MS_RET(0) 168}; 169 170/* 171 * nibble_inbyte_hook() 172 * 173 * Formats high and low nibble into a character 174 */ 175static int 176nibble_inbyte_hook (void *p, char *ptr) 177{ 178 struct vpo_nibble *s = (struct vpo_nibble *)p; 179 180 /* increment the buffer pointer */ 181 *ptr = ((s->l >> 4) & 0x0f) + (s->h & 0xf0); 182 183 return (0); 184} 185 186/* 187 * Macro used to initialize each vpoio_data structure during 188 * low level attachment 189 * 190 * XXX should be converted to ppb_MS_init_msq() 191 */ 192#define INIT_NIBBLE_INBYTE_SUBMICROSEQ(vpo) { \ 193 (vpo)->vpo_nibble_inbyte_msq[6].arg[2].p = \ 194 (void *)&(vpo)->vpo_nibble.h; \ 195 (vpo)->vpo_nibble_inbyte_msq[3].arg[2].p = \ 196 (void *)&(vpo)->vpo_nibble.l; \ 197 (vpo)->vpo_nibble_inbyte_msq[9].arg[0].f = \ 198 nibble_inbyte_hook; \ 199 (vpo)->vpo_nibble_inbyte_msq[9].arg[1].p = \ 200 (void *)&(vpo)->vpo_nibble; \ 201} 202 203/* 204 * This is the sub-microseqence for MS_GET in NIBBLE mode 205 * Retrieve the two nibbles and call the C function to generate the character 206 * and store it in the buffer (see nibble_inbyte_hook()) 207 */ 208static struct ppb_microseq nibble_inbyte_submicroseq[] = { 209 MS_CASS(0x4), 210 211/* loop: */ 212 MS_CASS(0x6), 213 MS_DELAY(1), 214 MS_RFETCH(MS_REG_STR, MS_FETCH_ALL, MS_UNKNOWN /* low nibble */), 215 MS_CASS(0x5), 216 MS_DELAY(1), 217 MS_RFETCH(MS_REG_STR, MS_FETCH_ALL, MS_UNKNOWN /* high nibble */), 218 MS_CASS(0x4), 219 MS_DELAY(1), 220 221 /* do a C call to format the received nibbles */ 222 MS_C_CALL(MS_UNKNOWN /* C hook */, MS_UNKNOWN /* param */), 223 MS_DBRA(-7 /* loop */), 224 MS_RET(0) 225}; 226 227/* 228 * This is the sub-microseqence for MS_GET in PS2 mode 229 */ 230static struct ppb_microseq ps2_inbyte_submicroseq[] = { 231 MS_CASS(0x4), 232 233/* loop: */ 234 MS_CASS(PCD | 0x6), 235 MS_RFETCH_P(1, MS_REG_DTR, MS_FETCH_ALL), 236 MS_CASS(PCD | 0x5), 237 MS_DBRA(-4 /* loop */), 238 239 MS_RET(0) 240}; 241 242/* 243 * This is the sub-microsequence for MS_PUT in both NIBBLE and PS2 modes 244 */ 245static struct ppb_microseq spp_outbyte_submicroseq[] = { 246 MS_CASS(0x4), 247 248/* loop: */ 249 MS_RASSERT_P(1, MS_REG_DTR), 250 MS_CASS(0x5), 251 MS_DBRA(0), /* decrement counter */ 252 MS_RASSERT_P(1, MS_REG_DTR), 253 MS_CASS(0x0), 254 MS_DBRA(-6 /* loop */), 255 256 /* return from the put call */ 257 MS_CASS(0x4), 258 MS_RET(0) 259}; 260 261/* EPP 1.7 microsequences, ptr and len set at runtime */ 262static struct ppb_microseq epp17_outstr[] = { 263 MS_CASS(0x4), 264 MS_RASSERT_P(MS_ACCUM, MS_REG_EPP_D), 265 MS_CASS(0xc), 266 MS_RET(0), 267}; 268 269static struct ppb_microseq epp17_instr[] = { 270 MS_CASS(PCD | 0x4), 271 MS_RFETCH_P(MS_ACCUM, MS_REG_EPP_D, MS_FETCH_ALL), 272 MS_CASS(PCD | 0xc), 273 MS_RET(0), 274}; 275 276static int 277imm_disconnect(struct vpoio_data *vpo, int *connected, int release_bus) 278{ 279 DECLARE_CPP_MICROSEQ; 280 281 device_t ppbus = device_get_parent(vpo->vpo_dev); 282 char s1, s2, s3; 283 int ret; 284 285 /* all should be ok */ 286 if (connected) 287 *connected = 0; 288 289 ppb_MS_init_msq(cpp_microseq, 4, CPP_S1, (void *)&s1, 290 CPP_S2, (void *)&s2, CPP_S3, (void *)&s3, 291 CPP_PARAM, 0x30); 292 293 ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret); 294 295 if ((s1 != (char)0xb8 || s2 != (char)0x18 || s3 != (char)0x38)) { 296 if (bootverbose) 297 printf("imm%d: (disconnect) s1=0x%x s2=0x%x, s3=0x%x\n", 298 vpo->vpo_unit, s1 & 0xff, s2 & 0xff, s3 & 0xff); 299 if (connected) 300 *connected = VP0_ECONNECT; 301 } 302 303 if (release_bus) 304 return (ppb_release_bus(ppbus, vpo->vpo_dev)); 305 else 306 return (0); 307} 308 309/* 310 * how : PPB_WAIT or PPB_DONTWAIT 311 */ 312static int 313imm_connect(struct vpoio_data *vpo, int how, int *disconnected, int request_bus) 314{ 315 DECLARE_CPP_MICROSEQ; 316 317 device_t ppbus = device_get_parent(vpo->vpo_dev); 318 char s1, s2, s3; 319 int error; 320 int ret; 321 322 /* all should be ok */ 323 if (disconnected) 324 *disconnected = 0; 325 326 if (request_bus) 327 if ((error = ppb_request_bus(ppbus, vpo->vpo_dev, how))) 328 return (error); 329 330 ppb_MS_init_msq(cpp_microseq, 3, CPP_S1, (void *)&s1, 331 CPP_S2, (void *)&s2, CPP_S3, (void *)&s3); 332 333 /* select device 0 in compatible mode */ 334 ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0xe0); 335 ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret); 336 337 /* disconnect all devices */ 338 ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0x30); 339 ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret); 340 341 if (PPB_IN_EPP_MODE(ppbus)) 342 ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0x28); 343 else 344 ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0xe0); 345 346 ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret); 347 348 if ((s1 != (char)0xb8 || s2 != (char)0x18 || s3 != (char)0x30)) { 349 if (bootverbose) 350 printf("imm%d: (connect) s1=0x%x s2=0x%x, s3=0x%x\n", 351 vpo->vpo_unit, s1 & 0xff, s2 & 0xff, s3 & 0xff); 352 if (disconnected) 353 *disconnected = VP0_ECONNECT; 354 } 355 356 return (0); 357} 358 359/* 360 * imm_detect() 361 * 362 * Detect and initialise the VP0 adapter. 363 */ 364static int 365imm_detect(struct vpoio_data *vpo) 366{ 367 device_t ppbus = device_get_parent(vpo->vpo_dev); 368 int error; 369 370 if ((error = ppb_request_bus(ppbus, vpo->vpo_dev, PPB_DONTWAIT))) 371 return (error); 372 373 /* disconnect the drive, keep the bus */ 374 imm_disconnect(vpo, NULL, 0); 375 376 vpo->vpo_mode_found = VP0_MODE_UNDEFINED; 377 error = 1; 378 379 /* try to enter EPP mode since vpoio failure put the bus in NIBBLE */ 380 if (ppb_set_mode(ppbus, PPB_EPP) != -1) { 381 imm_connect(vpo, PPB_DONTWAIT, &error, 0); 382 } 383 384 /* if connection failed try PS/2 then NIBBLE modes */ 385 if (error) { 386 if (ppb_set_mode(ppbus, PPB_PS2) != -1) { 387 imm_connect(vpo, PPB_DONTWAIT, &error, 0); 388 } 389 if (error) { 390 if (ppb_set_mode(ppbus, PPB_NIBBLE) != -1) { 391 imm_connect(vpo, PPB_DONTWAIT, &error, 0); 392 if (error) 393 goto error; 394 vpo->vpo_mode_found = VP0_MODE_NIBBLE; 395 } else { 396 printf("imm%d: NIBBLE mode unavailable!\n", vpo->vpo_unit); 397 goto error; 398 } 399 } else { 400 vpo->vpo_mode_found = VP0_MODE_PS2; 401 } 402 } else { 403 vpo->vpo_mode_found = VP0_MODE_EPP; 404 } 405 406 /* send SCSI reset signal */ 407 ppb_MS_microseq(ppbus, vpo->vpo_dev, reset_microseq, NULL); 408 409 /* release the bus now */ 410 imm_disconnect(vpo, &error, 1); 411 412 /* ensure we are disconnected or daisy chained peripheral 413 * may cause serious problem to the disk */ 414 415 if (error) { 416 if (bootverbose) 417 printf("imm%d: can't disconnect from the drive\n", 418 vpo->vpo_unit); 419 goto error; 420 } 421 422 return (0); 423 424error: 425 ppb_release_bus(ppbus, vpo->vpo_dev); 426 return (VP0_EINITFAILED); 427} 428 429/* 430 * imm_outstr() 431 */ 432static int 433imm_outstr(struct vpoio_data *vpo, char *buffer, int size) 434{ 435 device_t ppbus = device_get_parent(vpo->vpo_dev); 436 int error = 0; 437 438 if (PPB_IN_EPP_MODE(ppbus)) 439 ppb_reset_epp_timeout(ppbus); 440 441 ppb_MS_exec(ppbus, vpo->vpo_dev, MS_OP_PUT, (union ppb_insarg)buffer, 442 (union ppb_insarg)size, (union ppb_insarg)MS_UNKNOWN, &error); 443 444 return (error); 445} 446 447/* 448 * imm_instr() 449 */ 450static int 451imm_instr(struct vpoio_data *vpo, char *buffer, int size) 452{ 453 device_t ppbus = device_get_parent(vpo->vpo_dev); 454 int error = 0; 455 456 if (PPB_IN_EPP_MODE(ppbus)) 457 ppb_reset_epp_timeout(ppbus); 458 459 ppb_MS_exec(ppbus, vpo->vpo_dev, MS_OP_GET, (union ppb_insarg)buffer, 460 (union ppb_insarg)size, (union ppb_insarg)MS_UNKNOWN, &error); 461 462 return (error); 463} 464 465static char 466imm_select(struct vpoio_data *vpo, int initiator, int target) 467{ 468 DECLARE_SELECT_MICROSEQUENCE; 469 device_t ppbus = device_get_parent(vpo->vpo_dev); 470 int ret; 471 472 /* initialize the select microsequence */ 473 ppb_MS_init_msq(select_microseq, 1, 474 SELECT_TARGET, 1 << initiator | 1 << target); 475 476 ppb_MS_microseq(ppbus, vpo->vpo_dev, select_microseq, &ret); 477 478 return (ret); 479} 480 481/* 482 * imm_wait() 483 * 484 * H_SELIN must be low. 485 * 486 * XXX should be ported to microseq 487 */ 488static char 489imm_wait(struct vpoio_data *vpo, int tmo) 490{ 491 device_t ppbus = device_get_parent(vpo->vpo_dev); 492 register int k; 493 register char r; 494 495 ppb_wctr(ppbus, 0xc); 496 497 /* XXX should be ported to microseq */ 498 k = 0; 499 while (!((r = ppb_rstr(ppbus)) & 0x80) && (k++ < tmo)) 500 DELAY(1); 501 502 /* 503 * Return some status information. 504 * Semantics : 0x88 = ZIP+ wants more data 505 * 0x98 = ZIP+ wants to send more data 506 * 0xa8 = ZIP+ wants command 507 * 0xb8 = end of transfer, ZIP+ is sending status 508 */ 509 ppb_wctr(ppbus, 0x4); 510 if (k < tmo) 511 return (r & 0xb8); 512 513 return (0); /* command timed out */ 514} 515 516static int 517imm_negociate(struct vpoio_data *vpo) 518{ 519 DECLARE_NEGOCIATE_MICROSEQ; 520 device_t ppbus = device_get_parent(vpo->vpo_dev); 521 int negociate_mode; 522 int ret; 523 524 if (PPB_IN_NIBBLE_MODE(ppbus)) 525 negociate_mode = 0; 526 else if (PPB_IN_PS2_MODE(ppbus)) 527 negociate_mode = 1; 528 else 529 return (0); 530 531#if 0 /* XXX use standalone code not to depend on ppb_1284 code yet */ 532 ret = ppb_1284_negociate(ppbus, negociate_mode); 533 534 if (ret) 535 return (VP0_ENEGOCIATE); 536#endif 537 538 ppb_MS_init_msq(negociate_microseq, 1, 539 NEGOCIATED_MODE, negociate_mode); 540 541 ppb_MS_microseq(ppbus, vpo->vpo_dev, negociate_microseq, &ret); 542 543 return (ret); 544} 545 546/* 547 * imm_probe() 548 * 549 * Low level probe of vpo device 550 * 551 */ 552int 553imm_probe(device_t dev, struct vpoio_data *vpo) 554{ 555 int error; 556 557 /* ppbus dependent initialisation */ 558 vpo->vpo_dev = dev; 559 560 /* now, try to initialise the drive */ 561 if ((error = imm_detect(vpo))) { 562 return (error); 563 } 564 565 return (0); 566} 567 568/* 569 * imm_attach() 570 * 571 * Low level attachment of vpo device 572 * 573 */ 574int 575imm_attach(struct vpoio_data *vpo) 576{ 577 device_t ppbus = device_get_parent(vpo->vpo_dev); 578 579 /* 580 * Initialize microsequence code 581 */ 582 vpo->vpo_nibble_inbyte_msq = (struct ppb_microseq *)malloc( 583 sizeof(nibble_inbyte_submicroseq), M_DEVBUF, M_NOWAIT); 584 585 if (!vpo->vpo_nibble_inbyte_msq) 586 return (ENXIO); 587 588 bcopy((void *)nibble_inbyte_submicroseq, 589 (void *)vpo->vpo_nibble_inbyte_msq, 590 sizeof(nibble_inbyte_submicroseq)); 591 592 INIT_NIBBLE_INBYTE_SUBMICROSEQ(vpo); 593 594 /* 595 * Initialize mode dependent in/out microsequences 596 */ 597 ppb_request_bus(ppbus, vpo->vpo_dev, PPB_WAIT); 598 599 /* ppbus automatically restore the last mode entered during detection */ 600 switch (vpo->vpo_mode_found) { 601 case VP0_MODE_EPP: 602 ppb_MS_GET_init(ppbus, vpo->vpo_dev, epp17_instr); 603 ppb_MS_PUT_init(ppbus, vpo->vpo_dev, epp17_outstr); 604 printf("imm%d: EPP mode\n", vpo->vpo_unit); 605 break; 606 case VP0_MODE_PS2: 607 ppb_MS_GET_init(ppbus, vpo->vpo_dev, ps2_inbyte_submicroseq); 608 ppb_MS_PUT_init(ppbus, vpo->vpo_dev, spp_outbyte_submicroseq); 609 printf("imm%d: PS2 mode\n", vpo->vpo_unit); 610 break; 611 case VP0_MODE_NIBBLE: 612 ppb_MS_GET_init(ppbus, vpo->vpo_dev, vpo->vpo_nibble_inbyte_msq); 613 ppb_MS_PUT_init(ppbus, vpo->vpo_dev, spp_outbyte_submicroseq); 614 printf("imm%d: NIBBLE mode\n", vpo->vpo_unit); 615 break; 616 default: 617 panic("imm: unknown mode %d", vpo->vpo_mode_found); 618 } 619 620 ppb_release_bus(ppbus, vpo->vpo_dev); 621 622 return (0); 623} 624 625/* 626 * imm_reset_bus() 627 * 628 */ 629int 630imm_reset_bus(struct vpoio_data *vpo) 631{ 632 device_t ppbus = device_get_parent(vpo->vpo_dev); 633 int disconnected; 634 635 /* first, connect to the drive and request the bus */ 636 imm_connect(vpo, PPB_WAIT|PPB_INTR, &disconnected, 1); 637 638 if (!disconnected) { 639 640 /* reset the SCSI bus */ 641 ppb_MS_microseq(ppbus, vpo->vpo_dev, reset_microseq, NULL); 642 643 /* then disconnect */ 644 imm_disconnect(vpo, NULL, 1); 645 } 646 647 return (0); 648} 649 650/* 651 * imm_do_scsi() 652 * 653 * Send an SCSI command 654 * 655 */ 656int 657imm_do_scsi(struct vpoio_data *vpo, int host, int target, char *command, 658 int clen, char *buffer, int blen, int *result, int *count, 659 int *ret) 660{ 661 device_t ppbus = device_get_parent(vpo->vpo_dev); 662 register char r; 663 char l, h = 0; 664 int len, error = 0, not_connected = 0; 665 register int k; 666 int negociated = 0; 667 668 /* 669 * enter disk state, allocate the ppbus 670 * 671 * XXX 672 * Should we allow this call to be interruptible? 673 * The only way to report the interruption is to return 674 * EIO do upper SCSI code :^( 675 */ 676 if ((error = imm_connect(vpo, PPB_WAIT|PPB_INTR, ¬_connected, 1))) 677 return (error); 678 679 if (not_connected) { 680 *ret = VP0_ECONNECT; goto error; 681 } 682 683 /* 684 * Select the drive ... 685 */ 686 if ((*ret = imm_select(vpo,host,target))) 687 goto error; 688 689 /* 690 * Send the command ... 691 */ 692 for (k = 0; k < clen; k+=2) { 693 if (imm_wait(vpo, VP0_FAST_SPINTMO) != (char)0xa8) { 694 *ret = VP0_ECMD_TIMEOUT; 695 goto error; 696 } 697 if (imm_outstr(vpo, &command[k], 2)) { 698 *ret = VP0_EPPDATA_TIMEOUT; 699 goto error; 700 } 701 } 702 703 if (!(r = imm_wait(vpo, VP0_LOW_SPINTMO))) { 704 *ret = VP0_ESTATUS_TIMEOUT; goto error; 705 } 706 707 if ((r & 0x30) == 0x10) { 708 if (imm_negociate(vpo)) { 709 *ret = VP0_ENEGOCIATE; 710 goto error; 711 } else 712 negociated = 1; 713 } 714 715 /* 716 * Complete transfer ... 717 */ 718 *count = 0; 719 for (;;) { 720 721 if (!(r = imm_wait(vpo, VP0_LOW_SPINTMO))) { 722 *ret = VP0_ESTATUS_TIMEOUT; goto error; 723 } 724 725 /* stop when the ZIP+ wants to send status */ 726 if (r == (char)0xb8) 727 break; 728 729 if (*count >= blen) { 730 *ret = VP0_EDATA_OVERFLOW; 731 goto error; 732 } 733 734 /* ZIP+ wants to send data? */ 735 if (r == (char)0x88) { 736 len = (((blen - *count) >= VP0_SECTOR_SIZE)) ? 737 VP0_SECTOR_SIZE : 2; 738 739 error = imm_outstr(vpo, &buffer[*count], len); 740 } else { 741 if (!PPB_IN_EPP_MODE(ppbus)) 742 len = 1; 743 else 744 len = (((blen - *count) >= VP0_SECTOR_SIZE)) ? 745 VP0_SECTOR_SIZE : 1; 746 747 error = imm_instr(vpo, &buffer[*count], len); 748 } 749 750 if (error) { 751 *ret = error; 752 goto error; 753 } 754 755 *count += len; 756 } 757 758 if ((PPB_IN_NIBBLE_MODE(ppbus) || 759 PPB_IN_PS2_MODE(ppbus)) && negociated) 760 ppb_MS_microseq(ppbus, vpo->vpo_dev, transfer_epilog, NULL); 761 762 /* 763 * Retrieve status ... 764 */ 765 if (imm_negociate(vpo)) { 766 *ret = VP0_ENEGOCIATE; 767 goto error; 768 } else 769 negociated = 1; 770 771 if (imm_instr(vpo, &l, 1)) { 772 *ret = VP0_EOTHER; goto error; 773 } 774 775 /* check if the ZIP+ wants to send more status */ 776 if (imm_wait(vpo, VP0_FAST_SPINTMO) == (char)0xb8) 777 if (imm_instr(vpo, &h, 1)) { 778 *ret = VP0_EOTHER+2; goto error; 779 } 780 781 /* Experience showed that we should discard this */ 782 if (h == -1) 783 h = 0; 784 785 *result = ((int) h << 8) | ((int) l & 0xff); 786 787error: 788 if ((PPB_IN_NIBBLE_MODE(ppbus) || 789 PPB_IN_PS2_MODE(ppbus)) && negociated) 790 ppb_MS_microseq(ppbus, vpo->vpo_dev, transfer_epilog, NULL); 791 792 /* return to printer state, release the ppbus */ 793 imm_disconnect(vpo, NULL, 1); 794 795 return (0); 796} 797