sci.c revision 1.13
1 /* $NetBSD: sci.c,v 1.13 1995/08/12 20:30:50 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Michael L. Hitch 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Van Jacobson of Lawrence Berkeley Laboratory. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)scsi.c 7.5 (Berkeley) 5/4/91 40 */ 41 42 /* 43 * AMIGA NCR 5380 scsi adaptor driver 44 */ 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/device.h> 49 #include <sys/disklabel.h> 50 #include <sys/dkstat.h> 51 #include <sys/buf.h> 52 #include <scsi/scsi_all.h> 53 #include <scsi/scsiconf.h> 54 #include <vm/vm.h> 55 #include <vm/vm_kern.h> 56 #include <vm/vm_page.h> 57 #include <machine/pmap.h> 58 #include <machine/cpu.h> 59 #include <amiga/amiga/device.h> 60 #include <amiga/amiga/custom.h> 61 #include <amiga/amiga/isr.h> 62 #include <amiga/dev/scireg.h> 63 #include <amiga/dev/scivar.h> 64 65 /* 66 * SCSI delays 67 * In u-seconds, primarily for state changes on the SPC. 68 */ 69 #define SCI_CMD_WAIT 50000 /* wait per step of 'immediate' cmds */ 70 #define SCI_DATA_WAIT 50000 /* wait per data in/out step */ 71 #define SCI_INIT_WAIT 50000 /* wait per step (both) during init */ 72 73 #define b_cylin b_resid 74 75 int sciicmd __P((struct sci_softc *, int, void *, int, void *, int,u_char)); 76 int scigo __P((struct sci_softc *, struct scsi_xfer *)); 77 int scigetsense __P((struct sci_softc *, struct scsi_xfer *)); 78 int sciselectbus __P((struct sci_softc *, u_char, u_char)); 79 void sciabort __P((struct sci_softc *, char *)); 80 void scierror __P((struct sci_softc *, u_char)); 81 void scireset __P((struct sci_softc *)); 82 void scisetdelay __P((int)); 83 void sci_scsidone __P((struct sci_softc *, int)); 84 void sci_donextcmd __P((struct sci_softc *)); 85 86 int sci_cmd_wait = SCI_CMD_WAIT; 87 int sci_data_wait = SCI_DATA_WAIT; 88 int sci_init_wait = SCI_INIT_WAIT; 89 90 int sci_no_dma = 0; 91 92 #ifdef DEBUG 93 #define QPRINTF(a) if (sci_debug > 1) printf a 94 int sci_debug = 0; 95 #else 96 #define QPRINTF 97 #endif 98 99 /* 100 * default minphys routine for sci based controllers 101 */ 102 void 103 sci_minphys(bp) 104 struct buf *bp; 105 { 106 107 /* 108 * No max transfer at this level. 109 */ 110 minphys(bp); 111 } 112 113 /* 114 * used by specific sci controller 115 * 116 * it appears that the higher level code does nothing with LUN's 117 * so I will too. I could plug it in, however so could they 118 * in scsi_scsi_cmd(). 119 */ 120 int 121 sci_scsicmd(xs) 122 struct scsi_xfer *xs; 123 { 124 struct sci_pending *pendp; 125 struct sci_softc *dev; 126 struct scsi_link *slp; 127 int flags, s; 128 129 slp = xs->sc_link; 130 dev = slp->adapter_softc; 131 flags = xs->flags; 132 133 if (flags & SCSI_DATA_UIO) 134 panic("sci: scsi data uio requested"); 135 136 if (dev->sc_xs && flags & SCSI_POLL) 137 panic("sci_scsicmd: busy"); 138 139 s = splbio(); 140 pendp = &dev->sc_xsstore[slp->target][slp->lun]; 141 if (pendp->xs) { 142 splx(s); 143 return(TRY_AGAIN_LATER); 144 } 145 146 if (dev->sc_xs) { 147 pendp->xs = xs; 148 TAILQ_INSERT_TAIL(&dev->sc_xslist, pendp, link); 149 splx(s); 150 return(SUCCESSFULLY_QUEUED); 151 } 152 pendp->xs = NULL; 153 dev->sc_xs = xs; 154 splx(s); 155 156 /* 157 * nothing is pending do it now. 158 */ 159 sci_donextcmd(dev); 160 161 if (flags & SCSI_POLL) 162 return(COMPLETE); 163 return(SUCCESSFULLY_QUEUED); 164 } 165 166 /* 167 * entered with dev->sc_xs pointing to the next xfer to perform 168 */ 169 void 170 sci_donextcmd(dev) 171 struct sci_softc *dev; 172 { 173 struct scsi_xfer *xs; 174 struct scsi_link *slp; 175 int flags, phase, stat; 176 177 xs = dev->sc_xs; 178 slp = xs->sc_link; 179 flags = xs->flags; 180 181 if (flags & SCSI_DATA_IN) 182 phase = DATA_IN_PHASE; 183 else if (flags & SCSI_DATA_OUT) 184 phase = DATA_OUT_PHASE; 185 else 186 phase = STATUS_PHASE; 187 188 if (flags & SCSI_RESET) 189 scireset(dev); 190 191 dev->sc_stat[0] = -1; 192 xs->cmd->bytes[0] |= slp->lun << 5; 193 if (phase == STATUS_PHASE || flags & SCSI_POLL) 194 stat = sciicmd(dev, slp->target, xs->cmd, xs->cmdlen, 195 xs->data, xs->datalen, phase); 196 else if (scigo(dev, xs) == 0) 197 return; 198 else 199 stat = dev->sc_stat[0]; 200 201 sci_scsidone(dev, stat); 202 } 203 204 void 205 sci_scsidone(dev, stat) 206 struct sci_softc *dev; 207 int stat; 208 { 209 struct sci_pending *pendp; 210 struct scsi_xfer *xs; 211 int s, donext; 212 213 xs = dev->sc_xs; 214 #ifdef DIAGNOSTIC 215 if (xs == NULL) 216 panic("sci_scsidone"); 217 #endif 218 #if 1 219 if (((struct device *)(xs->sc_link->device_softc))->dv_unit < dk_ndrive) 220 ++dk_xfer[((struct device *)(xs->sc_link->device_softc))->dv_unit]; 221 #endif 222 /* 223 * is this right? 224 */ 225 xs->status = stat; 226 227 if (stat == 0) 228 xs->resid = 0; 229 else { 230 switch(stat) { 231 case SCSI_CHECK: 232 if (stat = scigetsense(dev, xs)) 233 goto bad_sense; 234 xs->error = XS_SENSE; 235 break; 236 case SCSI_BUSY: 237 xs->error = XS_BUSY; 238 break; 239 bad_sense: 240 default: 241 xs->error = XS_DRIVER_STUFFUP; 242 QPRINTF(("sci_scsicmd() bad %x\n", stat)); 243 break; 244 } 245 } 246 xs->flags |= ITSDONE; 247 248 /* 249 * grab next command before scsi_done() 250 * this way no single device can hog scsi resources. 251 */ 252 s = splbio(); 253 pendp = dev->sc_xslist.tqh_first; 254 if (pendp == NULL) { 255 donext = 0; 256 dev->sc_xs = NULL; 257 } else { 258 donext = 1; 259 TAILQ_REMOVE(&dev->sc_xslist, pendp, link); 260 dev->sc_xs = pendp->xs; 261 pendp->xs = NULL; 262 } 263 splx(s); 264 scsi_done(xs); 265 266 if (donext) 267 sci_donextcmd(dev); 268 } 269 270 int 271 scigetsense(dev, xs) 272 struct sci_softc *dev; 273 struct scsi_xfer *xs; 274 { 275 struct scsi_sense rqs; 276 struct scsi_link *slp; 277 int stat; 278 279 slp = xs->sc_link; 280 281 rqs.opcode = REQUEST_SENSE; 282 rqs.byte2 = slp->lun << 5; 283 #ifdef not_yet 284 rqs.length = xs->req_sense_length ? xs->req_sense_length : 285 sizeof(xs->sense); 286 #else 287 rqs.length = sizeof(xs->sense); 288 #endif 289 290 rqs.unused[0] = rqs.unused[1] = rqs.control = 0; 291 292 return(sciicmd(dev, slp->target, &rqs, sizeof(rqs), &xs->sense, 293 rqs.length, DATA_IN_PHASE)); 294 } 295 296 void 297 sciabort(dev, where) 298 struct sci_softc *dev; 299 char *where; 300 { 301 printf ("%s: abort %s: csr = 0x%02x, bus = 0x%02x\n", 302 dev->sc_dev.dv_xname, where, *dev->sci_csr, *dev->sci_bus_csr); 303 304 if (dev->sc_flags & SCI_SELECTED) { 305 306 /* lets just hope it worked.. */ 307 dev->sc_flags &= ~SCI_SELECTED; 308 /* XXX */ 309 scireset (dev); 310 } 311 } 312 313 /* 314 * XXX Set/reset long delays. 315 * 316 * if delay == 0, reset default delays 317 * if delay < 0, set both delays to default long initialization values 318 * if delay > 0, set both delays to this value 319 * 320 * Used when a devices is expected to respond slowly (e.g. during 321 * initialization). 322 */ 323 void 324 scisetdelay(del) 325 int del; 326 { 327 static int saved_cmd_wait, saved_data_wait; 328 329 if (del) { 330 saved_cmd_wait = sci_cmd_wait; 331 saved_data_wait = sci_data_wait; 332 if (del > 0) 333 sci_cmd_wait = sci_data_wait = del; 334 else 335 sci_cmd_wait = sci_data_wait = sci_init_wait; 336 } else { 337 sci_cmd_wait = saved_cmd_wait; 338 sci_data_wait = saved_data_wait; 339 } 340 } 341 342 void 343 scireset(dev) 344 struct sci_softc *dev; 345 { 346 u_int i, s; 347 u_char my_id, csr; 348 349 dev->sc_flags &= ~SCI_SELECTED; 350 if (dev->sc_flags & SCI_ALIVE) 351 sciabort(dev, "reset"); 352 353 printf("%s: ", dev->sc_dev.dv_xname); 354 355 s = splbio(); 356 /* preserve our ID for now */ 357 my_id = 7; 358 359 /* 360 * Reset the chip 361 */ 362 *dev->sci_icmd = SCI_ICMD_TEST; 363 *dev->sci_icmd = SCI_ICMD_TEST | SCI_ICMD_RST; 364 delay (25); 365 *dev->sci_icmd = 0; 366 367 /* 368 * Set up various chip parameters 369 */ 370 *dev->sci_icmd = 0; 371 *dev->sci_tcmd = 0; 372 *dev->sci_sel_enb = 0; 373 374 /* anything else was zeroed by reset */ 375 376 splx (s); 377 378 printf("sci id %d\n", my_id); 379 dev->sc_flags |= SCI_ALIVE; 380 } 381 382 void 383 scierror(dev, csr) 384 struct sci_softc *dev; 385 u_char csr; 386 { 387 struct scsi_xfer *xs; 388 389 xs = dev->sc_xs; 390 391 #ifdef DIAGNOSTIC 392 if (xs == NULL) 393 panic("scierror"); 394 #endif 395 if (xs->flags & SCSI_SILENT) 396 return; 397 398 printf("%s: ", dev->sc_dev.dv_xname); 399 printf("csr == 0x%02i\n", csr); /* XXX */ 400 } 401 402 /* 403 * select the bus, return when selected or error. 404 */ 405 int 406 sciselectbus(dev, target, our_addr) 407 struct sci_softc *dev; 408 u_char target, our_addr; 409 { 410 register int timeo = 2500; 411 412 QPRINTF (("sciselectbus %d\n", target)); 413 414 /* if we're already selected, return */ 415 if (dev->sc_flags & SCI_SELECTED) /* XXXX */ 416 return 1; 417 418 if ((*dev->sci_bus_csr & (SCI_BUS_BSY|SCI_BUS_SEL)) && 419 (*dev->sci_bus_csr & (SCI_BUS_BSY|SCI_BUS_SEL)) && 420 (*dev->sci_bus_csr & (SCI_BUS_BSY|SCI_BUS_SEL))) 421 return 1; 422 423 *dev->sci_tcmd = 0; 424 *dev->sci_odata = 0x80 + (1 << target); 425 *dev->sci_icmd = SCI_ICMD_DATA|SCI_ICMD_SEL; 426 while ((*dev->sci_bus_csr & SCI_BUS_BSY) == 0) { 427 if (--timeo > 0) { 428 delay(100); 429 } else { 430 break; 431 } 432 } 433 if (timeo) { 434 *dev->sci_icmd = 0; 435 dev->sc_flags |= SCI_SELECTED; 436 return (0); 437 } 438 *dev->sci_icmd = 0; 439 return (1); 440 } 441 442 int 443 sci_ixfer_out(dev, len, buf, phase) 444 register struct sci_softc *dev; 445 int len; 446 register u_char *buf; 447 int phase; 448 { 449 register int wait = sci_data_wait; 450 u_char csr; 451 452 QPRINTF(("sci_ixfer_out {%d} %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 453 len, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], 454 buf[6], buf[7], buf[8], buf[9])); 455 456 *dev->sci_tcmd = phase; 457 *dev->sci_icmd = SCI_ICMD_DATA; 458 for (;len > 0; len--) { 459 csr = *dev->sci_bus_csr; 460 while (!(csr & SCI_BUS_REQ)) { 461 if ((csr & SCI_BUS_BSY) == 0 || --wait < 0) { 462 #ifdef DEBUG 463 if (sci_debug) 464 printf("sci_ixfer_out fail: l%d i%x w%d\n", 465 len, csr, wait); 466 #endif 467 return (len); 468 } 469 delay(1); 470 csr = *dev->sci_bus_csr; 471 } 472 473 if (!(*dev->sci_csr & SCI_CSR_PHASE_MATCH)) 474 break; 475 *dev->sci_odata = *buf; 476 *dev->sci_icmd = SCI_ICMD_DATA|SCI_ICMD_ACK; 477 buf++; 478 while (*dev->sci_bus_csr & SCI_BUS_REQ); 479 *dev->sci_icmd = SCI_ICMD_DATA; 480 } 481 482 QPRINTF(("sci_ixfer_out done\n")); 483 return (0); 484 } 485 486 void 487 sci_ixfer_in(dev, len, buf, phase) 488 struct sci_softc *dev; 489 int len; 490 register u_char *buf; 491 int phase; 492 { 493 int wait = sci_data_wait; 494 u_char *obp = buf; 495 u_char csr; 496 volatile register u_char *sci_bus_csr = dev->sci_bus_csr; 497 volatile register u_char *sci_data = dev->sci_data; 498 volatile register u_char *sci_icmd = dev->sci_icmd; 499 500 csr = *sci_bus_csr; 501 502 QPRINTF(("sci_ixfer_in %d, csr=%02x\n", len, csr)); 503 504 *dev->sci_tcmd = phase; 505 *sci_icmd = 0; 506 for (;len > 0; len--) { 507 csr = *sci_bus_csr; 508 while (!(csr & SCI_BUS_REQ)) { 509 if (!(csr & SCI_BUS_BSY) || --wait < 0) { 510 #ifdef DEBUG 511 if (sci_debug) 512 printf("sci_ixfer_in fail: l%d i%x w%d\n", 513 len, csr, wait); 514 #endif 515 return; 516 } 517 518 delay(1); 519 csr = *sci_bus_csr; 520 } 521 522 if (!(*dev->sci_csr & SCI_CSR_PHASE_MATCH)) 523 break; 524 *buf = *sci_data; 525 *sci_icmd = SCI_ICMD_ACK; 526 buf++; 527 while (*sci_bus_csr & SCI_BUS_REQ); 528 *sci_icmd = 0; 529 } 530 531 QPRINTF(("sci_ixfer_in {%d} %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 532 len, obp[0], obp[1], obp[2], obp[3], obp[4], obp[5], 533 obp[6], obp[7], obp[8], obp[9])); 534 } 535 536 /* 537 * SCSI 'immediate' command: issue a command to some SCSI device 538 * and get back an 'immediate' response (i.e., do programmed xfer 539 * to get the response data). 'cbuf' is a buffer containing a scsi 540 * command of length clen bytes. 'buf' is a buffer of length 'len' 541 * bytes for data. The transfer direction is determined by the device 542 * (i.e., by the scsi bus data xfer phase). If 'len' is zero, the 543 * command must supply no data. 'xferphase' is the bus phase the 544 * caller expects to happen after the command is issued. It should 545 * be one of DATA_IN_PHASE, DATA_OUT_PHASE or STATUS_PHASE. 546 */ 547 int 548 sciicmd(dev, target, cbuf, clen, buf, len, xferphase) 549 struct sci_softc *dev; 550 void *cbuf, *buf; 551 int clen, len; 552 u_char xferphase; 553 { 554 u_char phase, csr, asr; 555 register int wait; 556 557 /* select the SCSI bus (it's an error if bus isn't free) */ 558 if (sciselectbus (dev, target, dev->sc_scsi_addr)) 559 return -1; 560 /* 561 * Wait for a phase change (or error) then let the device 562 * sequence us through the various SCSI phases. 563 */ 564 dev->sc_stat[0] = 0xff; 565 dev->sc_msg[0] = 0xff; 566 phase = CMD_PHASE; 567 while (1) { 568 wait = sci_cmd_wait; 569 570 while ((*dev->sci_bus_csr & (SCI_BUS_REQ|SCI_BUS_BSY)) == SCI_BUS_BSY); 571 572 QPRINTF((">CSR:%02x<", *dev->sci_bus_csr)); 573 if ((*dev->sci_bus_csr & SCI_BUS_REQ) == 0) { 574 return -1; 575 } 576 phase = SCI_PHASE(*dev->sci_bus_csr); 577 578 switch (phase) { 579 case CMD_PHASE: 580 if (sci_ixfer_out (dev, clen, cbuf, phase)) 581 goto abort; 582 phase = xferphase; 583 break; 584 585 case DATA_IN_PHASE: 586 if (len <= 0) 587 goto abort; 588 wait = sci_data_wait; 589 sci_ixfer_in (dev, len, buf, phase); 590 phase = STATUS_PHASE; 591 break; 592 593 case DATA_OUT_PHASE: 594 if (len <= 0) 595 goto abort; 596 wait = sci_data_wait; 597 if (sci_ixfer_out (dev, len, buf, phase)) 598 goto abort; 599 phase = STATUS_PHASE; 600 break; 601 602 case MESG_IN_PHASE: 603 dev->sc_msg[0] = 0xff; 604 sci_ixfer_in (dev, 1, dev->sc_msg,phase); 605 dev->sc_flags &= ~SCI_SELECTED; 606 while (*dev->sci_bus_csr & SCI_BUS_BSY); 607 goto out; 608 break; 609 610 case MESG_OUT_PHASE: 611 phase = STATUS_PHASE; 612 break; 613 614 case STATUS_PHASE: 615 sci_ixfer_in (dev, 1, dev->sc_stat, phase); 616 phase = MESG_IN_PHASE; 617 break; 618 619 case BUS_FREE_PHASE: 620 goto out; 621 622 default: 623 printf("sci: unexpected phase %d in icmd from %d\n", 624 phase, target); 625 goto abort; 626 } 627 #if 0 628 if (wait <= 0) 629 goto abort; 630 #endif 631 } 632 633 abort: 634 sciabort(dev, "icmd"); 635 out: 636 QPRINTF(("=STS:%02x=", dev->sc_stat[0])); 637 return (dev->sc_stat[0]); 638 } 639 640 int 641 scigo(dev, xs) 642 struct sci_softc *dev; 643 struct scsi_xfer *xs; 644 { 645 int i, count, target; 646 u_char phase, csr, asr, cmd, *addr; 647 int wait; 648 649 target = xs->sc_link->target; 650 count = xs->datalen; 651 addr = xs->data; 652 653 if (sci_no_dma) { 654 sciicmd (dev, target, (u_char *) xs->cmd, xs->cmdlen, 655 addr, count, 656 xs->flags & SCSI_DATA_IN ? DATA_IN_PHASE : DATA_OUT_PHASE); 657 658 return (1); 659 } 660 661 /* select the SCSI bus (it's an error if bus isn't free) */ 662 if (sciselectbus (dev, target, dev->sc_scsi_addr)) 663 return -1; 664 /* 665 * Wait for a phase change (or error) then let the device 666 * sequence us through the various SCSI phases. 667 */ 668 dev->sc_stat[0] = 0xff; 669 dev->sc_msg[0] = 0xff; 670 phase = CMD_PHASE; 671 while (1) { 672 while ((*dev->sci_bus_csr & (SCI_BUS_REQ|SCI_BUS_BSY)) == 673 SCI_BUS_BSY); 674 675 QPRINTF((">CSR:%02x<", *dev->sci_bus_csr)); 676 if ((*dev->sci_bus_csr & SCI_BUS_REQ) == 0) { 677 goto abort; 678 } 679 phase = SCI_PHASE(*dev->sci_bus_csr); 680 681 switch (phase) { 682 case CMD_PHASE: 683 if (sci_ixfer_out (dev, xs->cmdlen, xs->cmd, phase)) 684 goto abort; 685 phase = xs->flags & SCSI_DATA_IN ? DATA_IN_PHASE : DATA_OUT_PHASE; 686 break; 687 688 case DATA_IN_PHASE: 689 if (count <= 0) 690 goto abort; 691 /* XXX use psuedo DMA if available */ 692 if (count >= 128 && dev->dma_xfer_in) 693 (*dev->dma_xfer_in)(dev, count, addr, phase); 694 else 695 sci_ixfer_in (dev, count, addr, phase); 696 phase = STATUS_PHASE; 697 break; 698 699 case DATA_OUT_PHASE: 700 if (count <= 0) 701 goto abort; 702 /* XXX use psuedo DMA if available */ 703 if (count >= 128 && dev->dma_xfer_out) 704 (*dev->dma_xfer_out)(dev, count, addr, phase); 705 else 706 if (sci_ixfer_out (dev, count, addr, phase)) 707 goto abort; 708 phase = STATUS_PHASE; 709 break; 710 711 case MESG_IN_PHASE: 712 dev->sc_msg[0] = 0xff; 713 sci_ixfer_in (dev, 1, dev->sc_msg,phase); 714 dev->sc_flags &= ~SCI_SELECTED; 715 while (*dev->sci_bus_csr & SCI_BUS_BSY); 716 goto out; 717 break; 718 719 case MESG_OUT_PHASE: 720 phase = STATUS_PHASE; 721 break; 722 723 case STATUS_PHASE: 724 sci_ixfer_in (dev, 1, dev->sc_stat, phase); 725 phase = MESG_IN_PHASE; 726 break; 727 728 case BUS_FREE_PHASE: 729 goto out; 730 731 default: 732 printf("sci: unexpected phase %d in icmd from %d\n", 733 phase, target); 734 goto abort; 735 } 736 } 737 738 abort: 739 sciabort(dev, "go"); 740 out: 741 QPRINTF(("=STS:%02x=", dev->sc_stat[0])); 742 return (1); 743 } 744
Indexes created Tue Sep 23 14:10:03 GMT 2025