Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/ppbus/immio.c
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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 * 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD: releng/5.3/sys/dev/ppbus/immio.c 119418 2003-08-24 17:55:58Z obrien $"); 32 33 /* 34 * Iomega ZIP+ Matchmaker Parallel Port Interface driver 35 * 36 * Thanks to David Campbell work on the Linux driver and the Iomega specs 37 * Thanks to Thiebault Moeglin for the drive 38 */ 39 #ifdef _KERNEL 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/module.h> 43 #include <sys/bus.h> 44 #include <sys/malloc.h> 45 46 #endif /* _KERNEL */ 47 48 #include "opt_vpo.h" 49 50 #include <dev/ppbus/ppbio.h> 51 #include <dev/ppbus/ppbconf.h> 52 #include <dev/ppbus/ppb_msq.h> 53 #include <dev/ppbus/vpoio.h> 54 #include <dev/ppbus/ppb_1284.h> 55 56 #include "ppbus_if.h" 57 58 #define VP0_SELTMO 5000 /* select timeout */ 59 #define VP0_FAST_SPINTMO 500000 /* wait status timeout */ 60 #define VP0_LOW_SPINTMO 5000000 /* wait status timeout */ 61 62 #define VP0_SECTOR_SIZE 512 63 64 /* 65 * Microcode to execute very fast I/O sequences at the lowest bus level. 66 */ 67 68 #define WAIT_RET MS_PARAM(7, 2, MS_TYP_PTR) 69 #define WAIT_TMO MS_PARAM(1, 0, MS_TYP_INT) 70 71 #define DECLARE_WAIT_MICROSEQUENCE \ 72 struct ppb_microseq wait_microseq[] = { \ 73 MS_CASS(0x0c), \ 74 MS_SET(MS_UNKNOWN), \ 75 /* loop */ \ 76 MS_BRSET(nBUSY, 4 /* ready */), \ 77 MS_DBRA(-2 /* loop */), \ 78 MS_CASS(0x04), \ 79 MS_RET(1), /* timed out */ \ 80 /* ready */ \ 81 MS_CASS(0x04), \ 82 MS_RFETCH(MS_REG_STR, 0xb8, MS_UNKNOWN ), \ 83 MS_RET(0) /* no error */ \ 84 } 85 86 #define SELECT_TARGET MS_PARAM(6, 1, MS_TYP_CHA) 87 88 #define DECLARE_SELECT_MICROSEQUENCE \ 89 struct ppb_microseq select_microseq[] = { \ 90 MS_CASS(0xc), \ 91 /* first, check there is nothing holding onto the bus */ \ 92 MS_SET(VP0_SELTMO), \ 93 /* _loop: */ \ 94 MS_BRCLEAR(0x8, 2 /* _ready */), \ 95 MS_DBRA(-2 /* _loop */), \ 96 MS_RET(2), /* bus busy */ \ 97 /* _ready: */ \ 98 MS_CASS(0x4), \ 99 MS_DASS(MS_UNKNOWN /* 0x80 | 1 << target */), \ 100 MS_DELAY(1), \ 101 MS_CASS(0xc), \ 102 MS_CASS(0xd), \ 103 /* now, wait until the drive is ready */ \ 104 MS_SET(VP0_SELTMO), \ 105 /* loop: */ \ 106 MS_BRSET(0x8, 3 /* ready */), \ 107 MS_DBRA(-2 /* loop */), \ 108 /* error: */ \ 109 MS_CASS(0xc), \ 110 MS_RET(VP0_ESELECT_TIMEOUT), \ 111 /* ready: */ \ 112 MS_CASS(0xc), \ 113 MS_RET(0) \ 114 } 115 116 static struct ppb_microseq transfer_epilog[] = { 117 MS_CASS(0x4), 118 MS_CASS(0xc), 119 MS_CASS(0xe), 120 MS_CASS(0x4), 121 MS_RET(0) 122 }; 123 124 #define CPP_S1 MS_PARAM(10, 2, MS_TYP_PTR) 125 #define CPP_S2 MS_PARAM(13, 2, MS_TYP_PTR) 126 #define CPP_S3 MS_PARAM(16, 2, MS_TYP_PTR) 127 #define CPP_PARAM MS_PARAM(17, 1, MS_TYP_CHA) 128 129 #define DECLARE_CPP_MICROSEQ \ 130 struct ppb_microseq cpp_microseq[] = { \ 131 MS_CASS(0x0c), MS_DELAY(2), \ 132 MS_DASS(0xaa), MS_DELAY(10), \ 133 MS_DASS(0x55), MS_DELAY(10), \ 134 MS_DASS(0x00), MS_DELAY(10), \ 135 MS_DASS(0xff), MS_DELAY(10), \ 136 MS_RFETCH(MS_REG_STR, 0xb8, MS_UNKNOWN /* &s1 */), \ 137 MS_DASS(0x87), MS_DELAY(10), \ 138 MS_RFETCH(MS_REG_STR, 0xb8, MS_UNKNOWN /* &s2 */), \ 139 MS_DASS(0x78), MS_DELAY(10), \ 140 MS_RFETCH(MS_REG_STR, 0x38, MS_UNKNOWN /* &s3 */), \ 141 MS_DASS(MS_UNKNOWN /* param */), \ 142 MS_DELAY(2), \ 143 MS_CASS(0x0c), MS_DELAY(10), \ 144 MS_CASS(0x0d), MS_DELAY(2), \ 145 MS_CASS(0x0c), MS_DELAY(10), \ 146 MS_DASS(0xff), MS_DELAY(10), \ 147 MS_RET(0) \ 148 } 149 150 #define NEGOCIATED_MODE MS_PARAM(2, 1, MS_TYP_CHA) 151 152 #define DECLARE_NEGOCIATE_MICROSEQ \ 153 struct ppb_microseq negociate_microseq[] = { \ 154 MS_CASS(0x4), \ 155 MS_DELAY(5), \ 156 MS_DASS(MS_UNKNOWN /* mode */), \ 157 MS_DELAY(100), \ 158 MS_CASS(0x6), \ 159 MS_DELAY(5), \ 160 MS_BRSET(0x20, 5 /* continue */), \ 161 MS_DELAY(5), \ 162 MS_CASS(0x7), \ 163 MS_DELAY(5), \ 164 MS_CASS(0x6), \ 165 MS_RET(VP0_ENEGOCIATE), \ 166 /* continue: */ \ 167 MS_DELAY(5), \ 168 MS_CASS(0x7), \ 169 MS_DELAY(5), \ 170 MS_CASS(0x6), \ 171 MS_RET(0) \ 172 } 173 174 #define INB_NIBBLE_L MS_PARAM(3, 2, MS_TYP_PTR) 175 #define INB_NIBBLE_H MS_PARAM(6, 2, MS_TYP_PTR) 176 #define INB_NIBBLE_F MS_PARAM(9, 0, MS_TYP_FUN) 177 #define INB_NIBBLE_P MS_PARAM(9, 1, MS_TYP_PTR) 178 179 /* 180 * This is the sub-microseqence for MS_GET in NIBBLE mode 181 * Retrieve the two nibbles and call the C function to generate the character 182 * and store it in the buffer (see nibble_inbyte_hook()) 183 */ 184 185 #define DECLARE_NIBBLE_INBYTE_SUBMICROSEQ \ 186 struct ppb_microseq nibble_inbyte_submicroseq[] = { \ 187 MS_CASS(0x4), \ 188 /* loop: */ \ 189 MS_CASS(0x6), \ 190 MS_DELAY(1), \ 191 MS_RFETCH(MS_REG_STR, MS_FETCH_ALL, MS_UNKNOWN /* low nibble */),\ 192 MS_CASS(0x5), \ 193 MS_DELAY(1), \ 194 MS_RFETCH(MS_REG_STR, MS_FETCH_ALL, MS_UNKNOWN /* high nibble */),\ 195 MS_CASS(0x4), \ 196 MS_DELAY(1), \ 197 /* do a C call to format the received nibbles */ \ 198 MS_C_CALL(MS_UNKNOWN /* C hook */, MS_UNKNOWN /* param */), \ 199 MS_DBRA(-7 /* loop */), \ 200 MS_RET(0) \ 201 } 202 203 static struct ppb_microseq reset_microseq[] = { 204 MS_CASS(0x04), 205 MS_DASS(0x40), 206 MS_DELAY(1), 207 MS_CASS(0x0c), 208 MS_CASS(0x0d), 209 MS_DELAY(50), 210 MS_CASS(0x0c), 211 MS_CASS(0x04), 212 MS_RET(0) 213 }; 214 215 /* 216 * nibble_inbyte_hook() 217 * 218 * Formats high and low nibble into a character 219 */ 220 static int 221 nibble_inbyte_hook (void *p, char *ptr) 222 { 223 struct vpo_nibble *s = (struct vpo_nibble *)p; 224 225 /* increment the buffer pointer */ 226 *ptr = ((s->l >> 4) & 0x0f) + (s->h & 0xf0); 227 228 return (0); 229 } 230 231 /* 232 * This is the sub-microseqence for MS_GET in PS2 mode 233 */ 234 static struct ppb_microseq ps2_inbyte_submicroseq[] = { 235 MS_CASS(0x4), 236 237 /* loop: */ 238 MS_CASS(PCD | 0x6), 239 MS_RFETCH_P(1, MS_REG_DTR, MS_FETCH_ALL), 240 MS_CASS(PCD | 0x5), 241 MS_DBRA(-4 /* loop */), 242 243 MS_RET(0) 244 }; 245 246 /* 247 * This is the sub-microsequence for MS_PUT in both NIBBLE and PS2 modes 248 */ 249 static struct ppb_microseq spp_outbyte_submicroseq[] = { 250 MS_CASS(0x4), 251 252 /* loop: */ 253 MS_RASSERT_P(1, MS_REG_DTR), 254 MS_CASS(0x5), 255 MS_DBRA(0), /* decrement counter */ 256 MS_RASSERT_P(1, MS_REG_DTR), 257 MS_CASS(0x0), 258 MS_DBRA(-6 /* loop */), 259 260 /* return from the put call */ 261 MS_CASS(0x4), 262 MS_RET(0) 263 }; 264 265 /* EPP 1.7 microsequences, ptr and len set at runtime */ 266 static struct ppb_microseq epp17_outstr[] = { 267 MS_CASS(0x4), 268 MS_RASSERT_P(MS_ACCUM, MS_REG_EPP_D), 269 MS_CASS(0xc), 270 MS_RET(0), 271 }; 272 273 static struct ppb_microseq epp17_instr[] = { 274 MS_CASS(PCD | 0x4), 275 MS_RFETCH_P(MS_ACCUM, MS_REG_EPP_D, MS_FETCH_ALL), 276 MS_CASS(PCD | 0xc), 277 MS_RET(0), 278 }; 279 280 static int 281 imm_disconnect(struct vpoio_data *vpo, int *connected, int release_bus) 282 { 283 DECLARE_CPP_MICROSEQ; 284 285 device_t ppbus = device_get_parent(vpo->vpo_dev); 286 char s1, s2, s3; 287 int ret; 288 289 /* all should be ok */ 290 if (connected) 291 *connected = 0; 292 293 ppb_MS_init_msq(cpp_microseq, 4, CPP_S1, (void *)&s1, 294 CPP_S2, (void *)&s2, CPP_S3, (void *)&s3, 295 CPP_PARAM, 0x30); 296 297 ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret); 298 299 if ((s1 != (char)0xb8 || s2 != (char)0x18 || s3 != (char)0x38)) { 300 if (bootverbose) 301 printf("imm%d: (disconnect) s1=0x%x s2=0x%x, s3=0x%x\n", 302 vpo->vpo_unit, s1 & 0xff, s2 & 0xff, s3 & 0xff); 303 if (connected) 304 *connected = VP0_ECONNECT; 305 } 306 307 if (release_bus) 308 return (ppb_release_bus(ppbus, vpo->vpo_dev)); 309 else 310 return (0); 311 } 312 313 /* 314 * how : PPB_WAIT or PPB_DONTWAIT 315 */ 316 static int 317 imm_connect(struct vpoio_data *vpo, int how, int *disconnected, int request_bus) 318 { 319 DECLARE_CPP_MICROSEQ; 320 321 device_t ppbus = device_get_parent(vpo->vpo_dev); 322 char s1, s2, s3; 323 int error; 324 int ret; 325 326 /* all should be ok */ 327 if (disconnected) 328 *disconnected = 0; 329 330 if (request_bus) 331 if ((error = ppb_request_bus(ppbus, vpo->vpo_dev, how))) 332 return (error); 333 334 ppb_MS_init_msq(cpp_microseq, 3, CPP_S1, (void *)&s1, 335 CPP_S2, (void *)&s2, CPP_S3, (void *)&s3); 336 337 /* select device 0 in compatible mode */ 338 ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0xe0); 339 ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret); 340 341 /* disconnect all devices */ 342 ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0x30); 343 ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret); 344 345 if (PPB_IN_EPP_MODE(ppbus)) 346 ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0x28); 347 else 348 ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0xe0); 349 350 ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret); 351 352 if ((s1 != (char)0xb8 || s2 != (char)0x18 || s3 != (char)0x30)) { 353 if (bootverbose) 354 printf("imm%d: (connect) s1=0x%x s2=0x%x, s3=0x%x\n", 355 vpo->vpo_unit, s1 & 0xff, s2 & 0xff, s3 & 0xff); 356 if (disconnected) 357 *disconnected = VP0_ECONNECT; 358 } 359 360 return (0); 361 } 362 363 /* 364 * imm_detect() 365 * 366 * Detect and initialise the VP0 adapter. 367 */ 368 static int 369 imm_detect(struct vpoio_data *vpo) 370 { 371 device_t ppbus = device_get_parent(vpo->vpo_dev); 372 int error; 373 374 if ((error = ppb_request_bus(ppbus, vpo->vpo_dev, PPB_DONTWAIT))) 375 return (error); 376 377 /* disconnect the drive, keep the bus */ 378 imm_disconnect(vpo, NULL, 0); 379 380 vpo->vpo_mode_found = VP0_MODE_UNDEFINED; 381 error = 1; 382 383 /* try to enter EPP mode since vpoio failure put the bus in NIBBLE */ 384 if (ppb_set_mode(ppbus, PPB_EPP) != -1) { 385 imm_connect(vpo, PPB_DONTWAIT, &error, 0); 386 } 387 388 /* if connection failed try PS/2 then NIBBLE modes */ 389 if (error) { 390 if (ppb_set_mode(ppbus, PPB_PS2) != -1) { 391 imm_connect(vpo, PPB_DONTWAIT, &error, 0); 392 } 393 if (error) { 394 if (ppb_set_mode(ppbus, PPB_NIBBLE) != -1) { 395 imm_connect(vpo, PPB_DONTWAIT, &error, 0); 396 if (error) 397 goto error; 398 vpo->vpo_mode_found = VP0_MODE_NIBBLE; 399 } else { 400 printf("imm%d: NIBBLE mode unavailable!\n", vpo->vpo_unit); 401 goto error; 402 } 403 } else { 404 vpo->vpo_mode_found = VP0_MODE_PS2; 405 } 406 } else { 407 vpo->vpo_mode_found = VP0_MODE_EPP; 408 } 409 410 /* send SCSI reset signal */ 411 ppb_MS_microseq(ppbus, vpo->vpo_dev, reset_microseq, NULL); 412 413 /* release the bus now */ 414 imm_disconnect(vpo, &error, 1); 415 416 /* ensure we are disconnected or daisy chained peripheral 417 * may cause serious problem to the disk */ 418 419 if (error) { 420 if (bootverbose) 421 printf("imm%d: can't disconnect from the drive\n", 422 vpo->vpo_unit); 423 goto error; 424 } 425 426 return (0); 427 428 error: 429 ppb_release_bus(ppbus, vpo->vpo_dev); 430 return (VP0_EINITFAILED); 431 } 432 433 /* 434 * imm_outstr() 435 */ 436 static int 437 imm_outstr(struct vpoio_data *vpo, char *buffer, int size) 438 { 439 device_t ppbus = device_get_parent(vpo->vpo_dev); 440 int error = 0; 441 442 if (PPB_IN_EPP_MODE(ppbus)) 443 ppb_reset_epp_timeout(ppbus); 444 445 ppb_MS_exec(ppbus, vpo->vpo_dev, MS_OP_PUT, (union ppb_insarg)buffer, 446 (union ppb_insarg)size, (union ppb_insarg)MS_UNKNOWN, &error); 447 448 return (error); 449 } 450 451 /* 452 * imm_instr() 453 */ 454 static int 455 imm_instr(struct vpoio_data *vpo, char *buffer, int size) 456 { 457 device_t ppbus = device_get_parent(vpo->vpo_dev); 458 int error = 0; 459 460 if (PPB_IN_EPP_MODE(ppbus)) 461 ppb_reset_epp_timeout(ppbus); 462 463 ppb_MS_exec(ppbus, vpo->vpo_dev, MS_OP_GET, (union ppb_insarg)buffer, 464 (union ppb_insarg)size, (union ppb_insarg)MS_UNKNOWN, &error); 465 466 return (error); 467 } 468 469 static char 470 imm_select(struct vpoio_data *vpo, int initiator, int target) 471 { 472 DECLARE_SELECT_MICROSEQUENCE; 473 device_t ppbus = device_get_parent(vpo->vpo_dev); 474 int ret; 475 476 /* initialize the select microsequence */ 477 ppb_MS_init_msq(select_microseq, 1, 478 SELECT_TARGET, 1 << initiator | 1 << target); 479 480 ppb_MS_microseq(ppbus, vpo->vpo_dev, select_microseq, &ret); 481 482 return (ret); 483 } 484 485 /* 486 * imm_wait() 487 * 488 * H_SELIN must be low. 489 * 490 */ 491 static char 492 imm_wait(struct vpoio_data *vpo, int tmo) 493 { 494 DECLARE_WAIT_MICROSEQUENCE; 495 496 device_t ppbus = device_get_parent(vpo->vpo_dev); 497 int ret, err; 498 499 /* 500 * Return some status information. 501 * Semantics : 0x88 = ZIP+ wants more data 502 * 0x98 = ZIP+ wants to send more data 503 * 0xa8 = ZIP+ wants command 504 * 0xb8 = end of transfer, ZIP+ is sending status 505 */ 506 507 ppb_MS_init_msq(wait_microseq, 2, 508 WAIT_RET, (void *)&ret, 509 WAIT_TMO, tmo); 510 511 ppb_MS_microseq(ppbus, vpo->vpo_dev, wait_microseq, &err); 512 513 if (err) 514 return (0); /* command timed out */ 515 516 return(ret); 517 } 518 519 static int 520 imm_negociate(struct vpoio_data *vpo) 521 { 522 DECLARE_NEGOCIATE_MICROSEQ; 523 device_t ppbus = device_get_parent(vpo->vpo_dev); 524 int negociate_mode; 525 int ret; 526 527 if (PPB_IN_NIBBLE_MODE(ppbus)) 528 negociate_mode = 0; 529 else if (PPB_IN_PS2_MODE(ppbus)) 530 negociate_mode = 1; 531 else 532 return (0); 533 534 #if 0 /* XXX use standalone code not to depend on ppb_1284 code yet */ 535 ret = ppb_1284_negociate(ppbus, negociate_mode); 536 537 if (ret) 538 return (VP0_ENEGOCIATE); 539 #endif 540 541 ppb_MS_init_msq(negociate_microseq, 1, 542 NEGOCIATED_MODE, negociate_mode); 543 544 ppb_MS_microseq(ppbus, vpo->vpo_dev, negociate_microseq, &ret); 545 546 return (ret); 547 } 548 549 /* 550 * imm_probe() 551 * 552 * Low level probe of vpo device 553 * 554 */ 555 int 556 imm_probe(device_t dev, struct vpoio_data *vpo) 557 { 558 int error; 559 560 /* ppbus dependent initialisation */ 561 vpo->vpo_dev = dev; 562 563 /* now, try to initialise the drive */ 564 if ((error = imm_detect(vpo))) { 565 return (error); 566 } 567 568 return (0); 569 } 570 571 /* 572 * imm_attach() 573 * 574 * Low level attachment of vpo device 575 * 576 */ 577 int 578 imm_attach(struct vpoio_data *vpo) 579 { 580 DECLARE_NIBBLE_INBYTE_SUBMICROSEQ; 581 device_t ppbus = device_get_parent(vpo->vpo_dev); 582 int error = 0; 583 584 /* 585 * Initialize microsequence code 586 */ 587 vpo->vpo_nibble_inbyte_msq = (struct ppb_microseq *)malloc( 588 sizeof(nibble_inbyte_submicroseq), M_DEVBUF, M_NOWAIT); 589 590 if (!vpo->vpo_nibble_inbyte_msq) 591 return (ENXIO); 592 593 bcopy((void *)nibble_inbyte_submicroseq, 594 (void *)vpo->vpo_nibble_inbyte_msq, 595 sizeof(nibble_inbyte_submicroseq)); 596 597 ppb_MS_init_msq(vpo->vpo_nibble_inbyte_msq, 4, 598 INB_NIBBLE_H, (void *)&(vpo)->vpo_nibble.h, 599 INB_NIBBLE_L, (void *)&(vpo)->vpo_nibble.l, 600 INB_NIBBLE_F, nibble_inbyte_hook, 601 INB_NIBBLE_P, (void *)&(vpo)->vpo_nibble); 602 603 /* 604 * Initialize mode dependent in/out microsequences 605 */ 606 if ((error = ppb_request_bus(ppbus, vpo->vpo_dev, PPB_WAIT))) 607 goto error; 608 609 /* ppbus automatically restore the last mode entered during detection */ 610 switch (vpo->vpo_mode_found) { 611 case VP0_MODE_EPP: 612 ppb_MS_GET_init(ppbus, vpo->vpo_dev, epp17_instr); 613 ppb_MS_PUT_init(ppbus, vpo->vpo_dev, epp17_outstr); 614 printf("imm%d: EPP mode\n", vpo->vpo_unit); 615 break; 616 case VP0_MODE_PS2: 617 ppb_MS_GET_init(ppbus, vpo->vpo_dev, ps2_inbyte_submicroseq); 618 ppb_MS_PUT_init(ppbus, vpo->vpo_dev, spp_outbyte_submicroseq); 619 printf("imm%d: PS2 mode\n", vpo->vpo_unit); 620 break; 621 case VP0_MODE_NIBBLE: 622 ppb_MS_GET_init(ppbus, vpo->vpo_dev, vpo->vpo_nibble_inbyte_msq); 623 ppb_MS_PUT_init(ppbus, vpo->vpo_dev, spp_outbyte_submicroseq); 624 printf("imm%d: NIBBLE mode\n", vpo->vpo_unit); 625 break; 626 default: 627 panic("imm: unknown mode %d", vpo->vpo_mode_found); 628 } 629 630 ppb_release_bus(ppbus, vpo->vpo_dev); 631 error: 632 return (error); 633 } 634 635 /* 636 * imm_reset_bus() 637 * 638 */ 639 int 640 imm_reset_bus(struct vpoio_data *vpo) 641 { 642 device_t ppbus = device_get_parent(vpo->vpo_dev); 643 int disconnected; 644 645 /* first, connect to the drive and request the bus */ 646 imm_connect(vpo, PPB_WAIT|PPB_INTR, &disconnected, 1); 647 648 if (!disconnected) { 649 650 /* reset the SCSI bus */ 651 ppb_MS_microseq(ppbus, vpo->vpo_dev, reset_microseq, NULL); 652 653 /* then disconnect */ 654 imm_disconnect(vpo, NULL, 1); 655 } 656 657 return (0); 658 } 659 660 /* 661 * imm_do_scsi() 662 * 663 * Send an SCSI command 664 * 665 */ 666 int 667 imm_do_scsi(struct vpoio_data *vpo, int host, int target, char *command, 668 int clen, char *buffer, int blen, int *result, int *count, 669 int *ret) 670 { 671 device_t ppbus = device_get_parent(vpo->vpo_dev); 672 register char r; 673 char l, h = 0; 674 int len, error = 0, not_connected = 0; 675 register int k; 676 int negociated = 0; 677 678 /* 679 * enter disk state, allocate the ppbus 680 * 681 * XXX 682 * Should we allow this call to be interruptible? 683 * The only way to report the interruption is to return 684 * EIO to upper SCSI code :^( 685 */ 686 if ((error = imm_connect(vpo, PPB_WAIT|PPB_INTR, ¬_connected, 1))) 687 return (error); 688 689 if (not_connected) { 690 *ret = VP0_ECONNECT; goto error; 691 } 692 693 /* 694 * Select the drive ... 695 */ 696 if ((*ret = imm_select(vpo,host,target))) 697 goto error; 698 699 /* 700 * Send the command ... 701 */ 702 for (k = 0; k < clen; k+=2) { 703 if (imm_wait(vpo, VP0_FAST_SPINTMO) != (char)0xa8) { 704 *ret = VP0_ECMD_TIMEOUT; 705 goto error; 706 } 707 if (imm_outstr(vpo, &command[k], 2)) { 708 *ret = VP0_EPPDATA_TIMEOUT; 709 goto error; 710 } 711 } 712 713 if (!(r = imm_wait(vpo, VP0_LOW_SPINTMO))) { 714 *ret = VP0_ESTATUS_TIMEOUT; goto error; 715 } 716 717 if ((r & 0x30) == 0x10) { 718 if (imm_negociate(vpo)) { 719 *ret = VP0_ENEGOCIATE; 720 goto error; 721 } else 722 negociated = 1; 723 } 724 725 /* 726 * Complete transfer ... 727 */ 728 *count = 0; 729 for (;;) { 730 731 if (!(r = imm_wait(vpo, VP0_LOW_SPINTMO))) { 732 *ret = VP0_ESTATUS_TIMEOUT; goto error; 733 } 734 735 /* stop when the ZIP+ wants to send status */ 736 if (r == (char)0xb8) 737 break; 738 739 if (*count >= blen) { 740 *ret = VP0_EDATA_OVERFLOW; 741 goto error; 742 } 743 744 /* ZIP+ wants to send data? */ 745 if (r == (char)0x88) { 746 len = (((blen - *count) >= VP0_SECTOR_SIZE)) ? 747 VP0_SECTOR_SIZE : 2; 748 749 error = imm_outstr(vpo, &buffer[*count], len); 750 } else { 751 if (!PPB_IN_EPP_MODE(ppbus)) 752 len = 1; 753 else 754 len = (((blen - *count) >= VP0_SECTOR_SIZE)) ? 755 VP0_SECTOR_SIZE : 1; 756 757 error = imm_instr(vpo, &buffer[*count], len); 758 } 759 760 if (error) { 761 *ret = error; 762 goto error; 763 } 764 765 *count += len; 766 } 767 768 if ((PPB_IN_NIBBLE_MODE(ppbus) || 769 PPB_IN_PS2_MODE(ppbus)) && negociated) 770 ppb_MS_microseq(ppbus, vpo->vpo_dev, transfer_epilog, NULL); 771 772 /* 773 * Retrieve status ... 774 */ 775 if (imm_negociate(vpo)) { 776 *ret = VP0_ENEGOCIATE; 777 goto error; 778 } else 779 negociated = 1; 780 781 if (imm_instr(vpo, &l, 1)) { 782 *ret = VP0_EOTHER; goto error; 783 } 784 785 /* check if the ZIP+ wants to send more status */ 786 if (imm_wait(vpo, VP0_FAST_SPINTMO) == (char)0xb8) 787 if (imm_instr(vpo, &h, 1)) { 788 *ret = VP0_EOTHER+2; goto error; 789 } 790 791 /* Experience showed that we should discard this */ 792 if (h == -1) 793 h = 0; 794 795 *result = ((int) h << 8) | ((int) l & 0xff); 796 797 error: 798 if ((PPB_IN_NIBBLE_MODE(ppbus) || 799 PPB_IN_PS2_MODE(ppbus)) && negociated) 800 ppb_MS_microseq(ppbus, vpo->vpo_dev, transfer_epilog, NULL); 801 802 /* return to printer state, release the ppbus */ 803 imm_disconnect(vpo, NULL, 1); 804 805 return (0); 806 }
Cache object: ccad3c089da899255f0b4df95f5f928d
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