drivers/scsi/sun3_scsi.c

   1 /*
   2  * Sun3 SCSI stuff by Erik Verbruggen (erik@bigmama.xtdnet.nl)
   3  *
   4  * Sun3 DMA routines added by Sam Creasey (sammy@sammy.net)
   5  *
   6  * VME support added by Sam Creasey
   7  *
   8  * TODO: modify this driver to support multiple Sun3 SCSI VME boards
   9  *
  10  * Adapted from mac_scsinew.c:
  11  */
  12 /*
  13  * Generic Macintosh NCR5380 driver
  14  *
  15  * Copyright 1998, Michael Schmitz <mschmitz@lbl.gov>
  16  *
  17  * derived in part from:
  18  */
  19 /*
  20  * Generic Generic NCR5380 driver
  21  *
  22  * Copyright 1995, Russell King
  23  *
  24  * ALPHA RELEASE 1.
  25  *
  26  * For more information, please consult
  27  *
  28  * NCR 5380 Family
  29  * SCSI Protocol Controller
  30  * Databook
  31  *
  32  * NCR Microelectronics
  33  * 1635 Aeroplaza Drive
  34  * Colorado Springs, CO 80916
  35  * 1+ (719) 578-3400
  36  * 1+ (800) 334-5454
  37  */
  38
  39
  40 /*
  41  * This is from mac_scsi.h, but hey, maybe this is useful for Sun3 too! :)
  42  *
  43  * Options :
  44  *
  45  * PARITY - enable parity checking.  Not supported.
  46  *
  47  * SCSI2 - enable support for SCSI-II tagged queueing.  Untested.
  48  *
  49  * USLEEP - enable support for devices that don't disconnect.  Untested.
  50  */
  51
  52 #define AUTOSENSE
  53
  54 #include <linux/types.h>
  55 #include <linux/stddef.h>
  56 #include <linux/ctype.h>
  57 #include <linux/delay.h>
  58
  59 #include <linux/module.h>
  60 #include <linux/signal.h>
  61 #include <linux/ioport.h>
  62 #include <linux/init.h>
  63 #include <linux/blkdev.h>
  64
  65 #include <asm/io.h>
  66
  67 #include <asm/sun3ints.h>
  68 #include <asm/dvma.h>
  69 #include <asm/idprom.h>
  70 #include <asm/machines.h>
  71
  72 /* dma on! */
  73 #define REAL_DMA
  74
  75 #include "scsi.h"
  76 #include <scsi/scsi_host.h>
  77 #include "sun3_scsi.h"
  78 #include "NCR5380.h"
  79
  80 extern int sun3_map_test(unsigned long, char *);
  81
  82 #define USE_WRAPPER
  83 /*#define RESET_BOOT */
  84 #define DRIVER_SETUP
  85
  86 /*
  87  * BUG can be used to trigger a strange code-size related hang on 2.1 kernels
  88  */
  89 #ifdef BUG
  90 #undef RESET_BOOT
  91 #undef DRIVER_SETUP
  92 #endif
  93
  94 /* #define SUPPORT_TAGS */
  95
  96 #ifdef SUN3_SCSI_VME
  97 #define ENABLE_IRQ()
  98 #else
  99 #define ENABLE_IRQ()    enable_irq( IRQ_SUN3_SCSI );
 100 #endif
 101
 102
 103 static irqreturn_t scsi_sun3_intr(int irq, void *dummy);
 104 static inline unsigned char sun3scsi_read(int reg);
 105 static inline void sun3scsi_write(int reg, int value);
 106
 107 static int setup_can_queue = -1;
 108 module_param(setup_can_queue, int, 0);
 109 static int setup_cmd_per_lun = -1;
 110 module_param(setup_cmd_per_lun, int, 0);
 111 static int setup_sg_tablesize = -1;
 112 module_param(setup_sg_tablesize, int, 0);
 113 #ifdef SUPPORT_TAGS
 114 static int setup_use_tagged_queuing = -1;
 115 module_param(setup_use_tagged_queuing, int, 0);
 116 #endif
 117 static int setup_hostid = -1;
 118 module_param(setup_hostid, int, 0);
 119
 120 static struct scsi_cmnd *sun3_dma_setup_done = NULL;
 121
 122 #define RESET_RUN_DONE
 123
 124 #define AFTER_RESET_DELAY       (HZ/2)
 125
 126 /* ms to wait after hitting dma regs */
 127 #define SUN3_DMA_DELAY 10
 128
 129 /* dvma buffer to allocate -- 32k should hopefully be more than sufficient */
 130 #define SUN3_DVMA_BUFSIZE 0xe000
 131
 132 /* minimum number of bytes to do dma on */
 133 #define SUN3_DMA_MINSIZE 128
 134
 135 static volatile unsigned char *sun3_scsi_regp;
 136 static volatile struct sun3_dma_regs *dregs;
 137 #ifndef SUN3_SCSI_VME
 138 static struct sun3_udc_regs *udc_regs = NULL;
 139 #endif
 140 static unsigned char *sun3_dma_orig_addr = NULL;
 141 static unsigned long sun3_dma_orig_count = 0;
 142 static int sun3_dma_active = 0;
 143 static unsigned long last_residual = 0;
 144
 145 /*
 146  * NCR 5380 register access functions
 147  */
 148
 149 static inline unsigned char sun3scsi_read(int reg)
 150 {
 151         return( sun3_scsi_regp[reg] );
 152 }
 153
 154 static inline void sun3scsi_write(int reg, int value)
 155 {
 156         sun3_scsi_regp[reg] = value;
 157 }
 158
 159 #ifndef SUN3_SCSI_VME
 160 /* dma controller register access functions */
 161
 162 static inline unsigned short sun3_udc_read(unsigned char reg)
 163 {
 164         unsigned short ret;
 165
 166         dregs->udc_addr = UDC_CSR;
 167         udelay(SUN3_DMA_DELAY);
 168         ret = dregs->udc_data;
 169         udelay(SUN3_DMA_DELAY);
 170
 171         return ret;
 172 }
 173
 174 static inline void sun3_udc_write(unsigned short val, unsigned char reg)
 175 {
 176         dregs->udc_addr = reg;
 177         udelay(SUN3_DMA_DELAY);
 178         dregs->udc_data = val;
 179         udelay(SUN3_DMA_DELAY);
 180 }
 181 #endif
 182
 183 /*
 184  * XXX: status debug
 185  */
 186 static struct Scsi_Host *default_instance;
 187
 188 /*
 189  * Function : int sun3scsi_detect(struct scsi_host_template * tpnt)
 190  *
 191  * Purpose : initializes mac NCR5380 driver based on the
 192  *      command line / compile time port and irq definitions.
 193  *
 194  * Inputs : tpnt - template for this SCSI adapter.
 195  *
 196  * Returns : 1 if a host adapter was found, 0 if not.
 197  *
 198  */
 199
 200 static int __init sun3scsi_detect(struct scsi_host_template *tpnt)
 201 {
 202         unsigned long ioaddr, irq;
 203         static int called = 0;
 204         struct Scsi_Host *instance;
 205 #ifdef SUN3_SCSI_VME
 206         int i;
 207         unsigned long addrs[3] = { IOBASE_SUN3_VMESCSI,
 208                                    IOBASE_SUN3_VMESCSI + 0x4000,
 209                                    0 };
 210         unsigned long vecs[3] = { SUN3_VEC_VMESCSI0,
 211                                   SUN3_VEC_VMESCSI1,
 212                                   0 };
 213 #endif
 214
 215         /* check that this machine has an onboard 5380 */
 216         switch(idprom->id_machtype) {
 217 #ifdef SUN3_SCSI_VME
 218         case SM_SUN3|SM_3_160:
 219         case SM_SUN3|SM_3_260:
 220                 break;
 221 #else
 222         case SM_SUN3|SM_3_50:
 223         case SM_SUN3|SM_3_60:
 224                 break;
 225 #endif
 226
 227         default:
 228                 return 0;
 229         }
 230
 231         if(called)
 232                 return 0;
 233
 234 #ifdef SUN3_SCSI_VME
 235         tpnt->proc_name = "Sun3 5380 VME SCSI";
 236 #else
 237         tpnt->proc_name = "Sun3 5380 SCSI";
 238 #endif
 239
 240         /* setup variables */
 241         tpnt->can_queue =
 242                 (setup_can_queue > 0) ? setup_can_queue : CAN_QUEUE;
 243         tpnt->cmd_per_lun =
 244                 (setup_cmd_per_lun > 0) ? setup_cmd_per_lun : CMD_PER_LUN;
 245         tpnt->sg_tablesize =
 246                 (setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_TABLESIZE;
 247
 248         if (setup_hostid >= 0)
 249                 tpnt->this_id = setup_hostid;
 250         else {
 251                 /* use 7 as default */
 252                 tpnt->this_id = 7;
 253         }
 254
 255 #ifdef SUN3_SCSI_VME
 256         ioaddr = 0;
 257         for (i = 0; addrs[i] != 0; i++) {
 258                 unsigned char x;
 259
 260                 ioaddr = (unsigned long)sun3_ioremap(addrs[i], PAGE_SIZE,
 261                                                      SUN3_PAGE_TYPE_VME16);
 262                 irq = vecs[i];
 263                 sun3_scsi_regp = (unsigned char *)ioaddr;
 264
 265                 dregs = (struct sun3_dma_regs *)(((unsigned char *)ioaddr) + 8);
 266
 267                 if (sun3_map_test((unsigned long)dregs, &x)) {
 268                         unsigned short oldcsr;
 269
 270                         oldcsr = dregs->csr;
 271                         dregs->csr = 0;
 272                         udelay(SUN3_DMA_DELAY);
 273                         if (dregs->csr == 0x1400)
 274                                 break;
 275
 276                         dregs->csr = oldcsr;
 277                 }
 278
 279                 iounmap((void *)ioaddr);
 280                 ioaddr = 0;
 281         }
 282
 283         if (!ioaddr)
 284                 return 0;
 285 #else
 286         irq = IRQ_SUN3_SCSI;
 287         ioaddr = (unsigned long)ioremap(IOBASE_SUN3_SCSI, PAGE_SIZE);
 288         sun3_scsi_regp = (unsigned char *)ioaddr;
 289
 290         dregs = (struct sun3_dma_regs *)(((unsigned char *)ioaddr) + 8);
 291
 292         if((udc_regs = dvma_malloc(sizeof(struct sun3_udc_regs)))
 293            == NULL) {
 294              printk("SUN3 Scsi couldn't allocate DVMA memory!\n");
 295              return 0;
 296         }
 297 #endif
 298 #ifdef SUPPORT_TAGS
 299         if (setup_use_tagged_queuing < 0)
 300                 setup_use_tagged_queuing = USE_TAGGED_QUEUING;
 301 #endif
 302
 303         instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
 304         if(instance == NULL)
 305                 return 0;
 306
 307         default_instance = instance;
 308
 309         instance->io_port = (unsigned long) ioaddr;
 310         instance->irq = irq;
 311
 312         NCR5380_init(instance, 0);
 313
 314         instance->n_io_port = 32;
 315
 316         ((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0;
 317
 318         if (request_irq(instance->irq, scsi_sun3_intr,
 319                              0, "Sun3SCSI-5380", instance)) {
 320 #ifndef REAL_DMA
 321                 printk("scsi%d: IRQ%d not free, interrupts disabled\n",
 322                        instance->host_no, instance->irq);
 323                 instance->irq = SCSI_IRQ_NONE;
 324 #else
 325                 printk("scsi%d: IRQ%d not free, bailing out\n",
 326                        instance->host_no, instance->irq);
 327                 return 0;
 328 #endif
 329         }
 330
 331         pr_info("scsi%d: %s at port %lX irq", instance->host_no,
 332                 tpnt->proc_name, instance->io_port);
 333         if (instance->irq == SCSI_IRQ_NONE)
 334                 printk ("s disabled");
 335         else
 336                 printk (" %d", instance->irq);
 337         printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
 338                instance->can_queue, instance->cmd_per_lun,
 339                SUN3SCSI_PUBLIC_RELEASE);
 340         printk("\nscsi%d:", instance->host_no);
 341         NCR5380_print_options(instance);
 342         printk("\n");
 343
 344         dregs->csr = 0;
 345         udelay(SUN3_DMA_DELAY);
 346         dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR;
 347         udelay(SUN3_DMA_DELAY);
 348         dregs->fifo_count = 0;
 349 #ifdef SUN3_SCSI_VME
 350         dregs->fifo_count_hi = 0;
 351         dregs->dma_addr_hi = 0;
 352         dregs->dma_addr_lo = 0;
 353         dregs->dma_count_hi = 0;
 354         dregs->dma_count_lo = 0;
 355
 356         dregs->ivect = VME_DATA24 | (instance->irq & 0xff);
 357 #endif
 358
 359         called = 1;
 360
 361 #ifdef RESET_BOOT
 362         sun3_scsi_reset_boot(instance);
 363 #endif
 364
 365         return 1;
 366 }
 367
 368 int sun3scsi_release (struct Scsi_Host *shpnt)
 369 {
 370         if (shpnt->irq != SCSI_IRQ_NONE)
 371                 free_irq(shpnt->irq, shpnt);
 372
 373         iounmap((void *)sun3_scsi_regp);
 374
 375         NCR5380_exit(shpnt);
 376         return 0;
 377 }
 378
 379 #ifdef RESET_BOOT
 380 /*
 381  * Our 'bus reset on boot' function
 382  */
 383
 384 static void sun3_scsi_reset_boot(struct Scsi_Host *instance)
 385 {
 386         unsigned long end;
 387
 388         NCR5380_local_declare();
 389         NCR5380_setup(instance);
 390
 391         /*
 392          * Do a SCSI reset to clean up the bus during initialization. No
 393          * messing with the queues, interrupts, or locks necessary here.
 394          */
 395
 396         printk( "Sun3 SCSI: resetting the SCSI bus..." );
 397
 398         /* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */
 399 //              sun3_disable_irq( IRQ_SUN3_SCSI );
 400
 401         /* get in phase */
 402         NCR5380_write( TARGET_COMMAND_REG,
 403                       PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) ));
 404
 405         /* assert RST */
 406         NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST );
 407
 408         /* The min. reset hold time is 25us, so 40us should be enough */
 409         udelay( 50 );
 410
 411         /* reset RST and interrupt */
 412         NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE );
 413         NCR5380_read( RESET_PARITY_INTERRUPT_REG );
 414
 415         for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); )
 416                 barrier();
 417
 418         /* switch on SCSI IRQ again */
 419 //              sun3_enable_irq( IRQ_SUN3_SCSI );
 420
 421         printk( " done\n" );
 422 }
 423 #endif
 424
 425 static const char *sun3scsi_info(struct Scsi_Host *spnt)
 426 {
 427     return "";
 428 }
 429
 430 // safe bits for the CSR
 431 #define CSR_GOOD 0x060f
 432
 433 static irqreturn_t scsi_sun3_intr(int irq, void *dummy)
 434 {
 435         unsigned short csr = dregs->csr;
 436         int handled = 0;
 437
 438 #ifdef SUN3_SCSI_VME
 439         dregs->csr &= ~CSR_DMA_ENABLE;
 440 #endif
 441
 442         if(csr & ~CSR_GOOD) {
 443                 if(csr & CSR_DMA_BUSERR) {
 444                         printk("scsi%d: bus error in dma\n", default_instance->host_no);
 445                 }
 446
 447                 if(csr & CSR_DMA_CONFLICT) {
 448                         printk("scsi%d: dma conflict\n", default_instance->host_no);
 449                 }
 450                 handled = 1;
 451         }
 452
 453         if(csr & (CSR_SDB_INT | CSR_DMA_INT)) {
 454                 NCR5380_intr(irq, dummy);
 455                 handled = 1;
 456         }
 457
 458         return IRQ_RETVAL(handled);
 459 }
 460
 461 /*
 462  * Debug stuff - to be called on NMI, or sysrq key. Use at your own risk;
 463  * reentering NCR5380_print_status seems to have ugly side effects
 464  */
 465
 466 /* this doesn't seem to get used at all -- sam */
 467 #if 0
 468 void sun3_sun3_debug (void)
 469 {
 470         unsigned long flags;
 471         NCR5380_local_declare();
 472
 473         if (default_instance) {
 474                         local_irq_save(flags);
 475                         NCR5380_print_status(default_instance);
 476                         local_irq_restore(flags);
 477         }
 478 }
 479 #endif
 480
 481
 482 /* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */
 483 static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)
 484 {
 485         void *addr;
 486
 487         if(sun3_dma_orig_addr != NULL)
 488                 dvma_unmap(sun3_dma_orig_addr);
 489
 490 #ifdef SUN3_SCSI_VME
 491         addr = (void *)dvma_map_vme((unsigned long) data, count);
 492 #else
 493         addr = (void *)dvma_map((unsigned long) data, count);
 494 #endif
 495
 496         sun3_dma_orig_addr = addr;
 497         sun3_dma_orig_count = count;
 498
 499 #ifndef SUN3_SCSI_VME
 500         dregs->fifo_count = 0;
 501         sun3_udc_write(UDC_RESET, UDC_CSR);
 502
 503         /* reset fifo */
 504         dregs->csr &= ~CSR_FIFO;
 505         dregs->csr |= CSR_FIFO;
 506 #endif
 507
 508         /* set direction */
 509         if(write_flag)
 510                 dregs->csr |= CSR_SEND;
 511         else
 512                 dregs->csr &= ~CSR_SEND;
 513
 514 #ifdef SUN3_SCSI_VME
 515         dregs->csr |= CSR_PACK_ENABLE;
 516
 517         dregs->dma_addr_hi = ((unsigned long)addr >> 16);
 518         dregs->dma_addr_lo = ((unsigned long)addr & 0xffff);
 519
 520         dregs->dma_count_hi = 0;
 521         dregs->dma_count_lo = 0;
 522         dregs->fifo_count_hi = 0;
 523         dregs->fifo_count = 0;
 524 #else
 525         /* byte count for fifo */
 526         dregs->fifo_count = count;
 527
 528         sun3_udc_write(UDC_RESET, UDC_CSR);
 529
 530         /* reset fifo */
 531         dregs->csr &= ~CSR_FIFO;
 532         dregs->csr |= CSR_FIFO;
 533
 534         if(dregs->fifo_count != count) {
 535                 printk("scsi%d: fifo_mismatch %04x not %04x\n",
 536                        default_instance->host_no, dregs->fifo_count,
 537                        (unsigned int) count);
 538                 NCR5380_dprint(NDEBUG_DMA, default_instance);
 539         }
 540
 541         /* setup udc */
 542         udc_regs->addr_hi = (((unsigned long)(addr) & 0xff0000) >> 8);
 543         udc_regs->addr_lo = ((unsigned long)(addr) & 0xffff);
 544         udc_regs->count = count/2; /* count in words */
 545         udc_regs->mode_hi = UDC_MODE_HIWORD;
 546         if(write_flag) {
 547                 if(count & 1)
 548                         udc_regs->count++;
 549                 udc_regs->mode_lo = UDC_MODE_LSEND;
 550                 udc_regs->rsel = UDC_RSEL_SEND;
 551         } else {
 552                 udc_regs->mode_lo = UDC_MODE_LRECV;
 553                 udc_regs->rsel = UDC_RSEL_RECV;
 554         }
 555
 556         /* announce location of regs block */
 557         sun3_udc_write(((dvma_vtob(udc_regs) & 0xff0000) >> 8),
 558                        UDC_CHN_HI);
 559
 560         sun3_udc_write((dvma_vtob(udc_regs) & 0xffff), UDC_CHN_LO);
 561
 562         /* set dma master on */
 563         sun3_udc_write(0xd, UDC_MODE);
 564
 565         /* interrupt enable */
 566         sun3_udc_write(UDC_INT_ENABLE, UDC_CSR);
 567 #endif
 568
 569         return count;
 570
 571 }
 572
 573 #ifndef SUN3_SCSI_VME
 574 static inline unsigned long sun3scsi_dma_count(struct Scsi_Host *instance)
 575 {
 576         unsigned short resid;
 577
 578         dregs->udc_addr = 0x32;
 579         udelay(SUN3_DMA_DELAY);
 580         resid = dregs->udc_data;
 581         udelay(SUN3_DMA_DELAY);
 582         resid *= 2;
 583
 584         return (unsigned long) resid;
 585 }
 586 #endif
 587
 588 static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)
 589 {
 590         return last_residual;
 591 }
 592
 593 static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted,
 594                                                   struct scsi_cmnd *cmd,
 595                                                   int write_flag)
 596 {
 597         if (cmd->request->cmd_type == REQ_TYPE_FS)
 598                 return wanted;
 599         else
 600                 return 0;
 601 }
 602
 603 static inline int sun3scsi_dma_start(unsigned long count, unsigned char *data)
 604 {
 605 #ifdef SUN3_SCSI_VME
 606         unsigned short csr;
 607
 608         csr = dregs->csr;
 609
 610         dregs->dma_count_hi = (sun3_dma_orig_count >> 16);
 611         dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff);
 612
 613         dregs->fifo_count_hi = (sun3_dma_orig_count >> 16);
 614         dregs->fifo_count = (sun3_dma_orig_count & 0xffff);
 615
 616 /*      if(!(csr & CSR_DMA_ENABLE))
 617  *              dregs->csr |= CSR_DMA_ENABLE;
 618  */
 619 #else
 620     sun3_udc_write(UDC_CHN_START, UDC_CSR);
 621 #endif
 622
 623     return 0;
 624 }
 625
 626 /* clean up after our dma is done */
 627 static int sun3scsi_dma_finish(int write_flag)
 628 {
 629         unsigned short __maybe_unused count;
 630         unsigned short fifo;
 631         int ret = 0;
 632
 633         sun3_dma_active = 0;
 634
 635 #ifdef SUN3_SCSI_VME
 636         dregs->csr &= ~CSR_DMA_ENABLE;
 637
 638         fifo = dregs->fifo_count;
 639         if (write_flag) {
 640                 if ((fifo > 0) && (fifo < sun3_dma_orig_count))
 641                         fifo++;
 642         }
 643
 644         last_residual = fifo;
 645         /* empty bytes from the fifo which didn't make it */
 646         if ((!write_flag) && (dregs->csr & CSR_LEFT)) {
 647                 unsigned char *vaddr;
 648
 649                 vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);
 650
 651                 vaddr += (sun3_dma_orig_count - fifo);
 652                 vaddr--;
 653
 654                 switch (dregs->csr & CSR_LEFT) {
 655                 case CSR_LEFT_3:
 656                         *vaddr = (dregs->bpack_lo & 0xff00) >> 8;
 657                         vaddr--;
 658
 659                 case CSR_LEFT_2:
 660                         *vaddr = (dregs->bpack_hi & 0x00ff);
 661                         vaddr--;
 662
 663                 case CSR_LEFT_1:
 664                         *vaddr = (dregs->bpack_hi & 0xff00) >> 8;
 665                         break;
 666                 }
 667         }
 668 #else
 669         // check to empty the fifo on a read
 670         if(!write_flag) {
 671                 int tmo = 20000; /* .2 sec */
 672
 673                 while(1) {
 674                         if(dregs->csr & CSR_FIFO_EMPTY)
 675                                 break;
 676
 677                         if(--tmo <= 0) {
 678                                 printk("sun3scsi: fifo failed to empty!\n");
 679                                 return 1;
 680                         }
 681                         udelay(10);
 682                 }
 683         }
 684
 685         count = sun3scsi_dma_count(default_instance);
 686
 687         fifo = dregs->fifo_count;
 688         last_residual = fifo;
 689
 690         /* empty bytes from the fifo which didn't make it */
 691         if((!write_flag) && (count - fifo) == 2) {
 692                 unsigned short data;
 693                 unsigned char *vaddr;
 694
 695                 data = dregs->fifo_data;
 696                 vaddr = (unsigned char *)dvma_btov(sun3_dma_orig_addr);
 697
 698                 vaddr += (sun3_dma_orig_count - fifo);
 699
 700                 vaddr[-2] = (data & 0xff00) >> 8;
 701                 vaddr[-1] = (data & 0xff);
 702         }
 703 #endif
 704
 705         dvma_unmap(sun3_dma_orig_addr);
 706         sun3_dma_orig_addr = NULL;
 707
 708 #ifdef SUN3_SCSI_VME
 709         dregs->dma_addr_hi = 0;
 710         dregs->dma_addr_lo = 0;
 711         dregs->dma_count_hi = 0;
 712         dregs->dma_count_lo = 0;
 713
 714         dregs->fifo_count = 0;
 715         dregs->fifo_count_hi = 0;
 716
 717         dregs->csr &= ~CSR_SEND;
 718 /*      dregs->csr |= CSR_DMA_ENABLE; */
 719 #else
 720         sun3_udc_write(UDC_RESET, UDC_CSR);
 721         dregs->fifo_count = 0;
 722         dregs->csr &= ~CSR_SEND;
 723
 724         /* reset fifo */
 725         dregs->csr &= ~CSR_FIFO;
 726         dregs->csr |= CSR_FIFO;
 727 #endif
 728
 729         sun3_dma_setup_done = NULL;
 730
 731         return ret;
 732
 733 }
 734
 735 #include "sun3_NCR5380.c"
 736
 737 static struct scsi_host_template driver_template = {
 738         .show_info              = sun3scsi_show_info,
 739         .name                   = SUN3_SCSI_NAME,
 740         .detect                 = sun3scsi_detect,
 741         .release                = sun3scsi_release,
 742         .info                   = sun3scsi_info,
 743         .queuecommand           = sun3scsi_queue_command,
 744         .eh_abort_handler       = sun3scsi_abort,
 745         .eh_bus_reset_handler   = sun3scsi_bus_reset,
 746         .can_queue              = CAN_QUEUE,
 747         .this_id                = 7,
 748         .sg_tablesize           = SG_TABLESIZE,
 749         .cmd_per_lun            = CMD_PER_LUN,
 750         .use_clustering         = DISABLE_CLUSTERING
 751 };
 752
 753
 754 #include "scsi_module.c"
 755
 756 MODULE_LICENSE("GPL");