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
  25 #include <linux/types.h>
  26 #include <linux/delay.h>
  27 #include <linux/module.h>
  28 #include <linux/ioport.h>
  29 #include <linux/init.h>
  30 #include <linux/blkdev.h>
  31 #include <linux/platform_device.h>
  32
  33 #include <asm/io.h>
  34 #include <asm/dvma.h>
  35
  36 #include <scsi/scsi_host.h>
  37 #include "sun3_scsi.h"
  38
  39 /* Definitions for the core NCR5380 driver. */
  40
  41 #define REAL_DMA
  42 /* #define SUPPORT_TAGS */
  43 /* minimum number of bytes to do dma on */
  44 #define DMA_MIN_SIZE                    129
  45
  46 /* #define MAX_TAGS                     32 */
  47
  48 #define NCR5380_implementation_fields   /* none */
  49
  50 #define NCR5380_read(reg)               sun3scsi_read(reg)
  51 #define NCR5380_write(reg, value)       sun3scsi_write(reg, value)
  52
  53 #define NCR5380_queue_command           sun3scsi_queue_command
  54 #define NCR5380_bus_reset               sun3scsi_bus_reset
  55 #define NCR5380_abort                   sun3scsi_abort
  56 #define NCR5380_show_info               sun3scsi_show_info
  57 #define NCR5380_info                    sun3scsi_info
  58
  59 #define NCR5380_dma_read_setup(instance, data, count) \
  60         sun3scsi_dma_setup(data, count, 0)
  61 #define NCR5380_dma_write_setup(instance, data, count) \
  62         sun3scsi_dma_setup(data, count, 1)
  63 #define NCR5380_dma_residual(instance) \
  64         sun3scsi_dma_residual(instance)
  65 #define NCR5380_dma_xfer_len(instance, cmd, phase) \
  66         sun3scsi_dma_xfer_len(cmd->SCp.this_residual, cmd, !((phase) & SR_IO))
  67
  68 #define NCR5380_acquire_dma_irq(instance)    (1)
  69 #define NCR5380_release_dma_irq(instance)
  70
  71 #include "NCR5380.h"
  72
  73
  74 extern int sun3_map_test(unsigned long, char *);
  75
  76 static int setup_can_queue = -1;
  77 module_param(setup_can_queue, int, 0);
  78 static int setup_cmd_per_lun = -1;
  79 module_param(setup_cmd_per_lun, int, 0);
  80 static int setup_sg_tablesize = -1;
  81 module_param(setup_sg_tablesize, int, 0);
  82 #ifdef SUPPORT_TAGS
  83 static int setup_use_tagged_queuing = -1;
  84 module_param(setup_use_tagged_queuing, int, 0);
  85 #endif
  86 static int setup_hostid = -1;
  87 module_param(setup_hostid, int, 0);
  88
  89 /* #define RESET_BOOT */
  90
  91 #define AFTER_RESET_DELAY       (HZ/2)
  92
  93 /* ms to wait after hitting dma regs */
  94 #define SUN3_DMA_DELAY 10
  95
  96 /* dvma buffer to allocate -- 32k should hopefully be more than sufficient */
  97 #define SUN3_DVMA_BUFSIZE 0xe000
  98
  99 static struct scsi_cmnd *sun3_dma_setup_done;
 100 static unsigned char *sun3_scsi_regp;
 101 static volatile struct sun3_dma_regs *dregs;
 102 static struct sun3_udc_regs *udc_regs;
 103 static unsigned char *sun3_dma_orig_addr = NULL;
 104 static unsigned long sun3_dma_orig_count = 0;
 105 static int sun3_dma_active = 0;
 106 static unsigned long last_residual = 0;
 107 static struct Scsi_Host *default_instance;
 108
 109 /*
 110  * NCR 5380 register access functions
 111  */
 112
 113 static inline unsigned char sun3scsi_read(int reg)
 114 {
 115         return in_8(sun3_scsi_regp + reg);
 116 }
 117
 118 static inline void sun3scsi_write(int reg, int value)
 119 {
 120         out_8(sun3_scsi_regp + reg, value);
 121 }
 122
 123 #ifndef SUN3_SCSI_VME
 124 /* dma controller register access functions */
 125
 126 static inline unsigned short sun3_udc_read(unsigned char reg)
 127 {
 128         unsigned short ret;
 129
 130         dregs->udc_addr = UDC_CSR;
 131         udelay(SUN3_DMA_DELAY);
 132         ret = dregs->udc_data;
 133         udelay(SUN3_DMA_DELAY);
 134
 135         return ret;
 136 }
 137
 138 static inline void sun3_udc_write(unsigned short val, unsigned char reg)
 139 {
 140         dregs->udc_addr = reg;
 141         udelay(SUN3_DMA_DELAY);
 142         dregs->udc_data = val;
 143         udelay(SUN3_DMA_DELAY);
 144 }
 145 #endif
 146
 147 #ifdef RESET_BOOT
 148 static void sun3_scsi_reset_boot(struct Scsi_Host *instance)
 149 {
 150         unsigned long end;
 151
 152         /*
 153          * Do a SCSI reset to clean up the bus during initialization. No
 154          * messing with the queues, interrupts, or locks necessary here.
 155          */
 156
 157         printk( "Sun3 SCSI: resetting the SCSI bus..." );
 158
 159         /* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */
 160 //              sun3_disable_irq( IRQ_SUN3_SCSI );
 161
 162         /* get in phase */
 163         NCR5380_write( TARGET_COMMAND_REG,
 164                       PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) ));
 165
 166         /* assert RST */
 167         NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST );
 168
 169         /* The min. reset hold time is 25us, so 40us should be enough */
 170         udelay( 50 );
 171
 172         /* reset RST and interrupt */
 173         NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE );
 174         NCR5380_read( RESET_PARITY_INTERRUPT_REG );
 175
 176         for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); )
 177                 barrier();
 178
 179         /* switch on SCSI IRQ again */
 180 //              sun3_enable_irq( IRQ_SUN3_SCSI );
 181
 182         printk( " done\n" );
 183 }
 184 #endif
 185
 186 // safe bits for the CSR
 187 #define CSR_GOOD 0x060f
 188
 189 static irqreturn_t scsi_sun3_intr(int irq, void *dummy)
 190 {
 191         unsigned short csr = dregs->csr;
 192         int handled = 0;
 193
 194 #ifdef SUN3_SCSI_VME
 195         dregs->csr &= ~CSR_DMA_ENABLE;
 196 #endif
 197
 198         if(csr & ~CSR_GOOD) {
 199                 if(csr & CSR_DMA_BUSERR) {
 200                         printk("scsi%d: bus error in dma\n", default_instance->host_no);
 201                 }
 202
 203                 if(csr & CSR_DMA_CONFLICT) {
 204                         printk("scsi%d: dma conflict\n", default_instance->host_no);
 205                 }
 206                 handled = 1;
 207         }
 208
 209         if(csr & (CSR_SDB_INT | CSR_DMA_INT)) {
 210                 NCR5380_intr(irq, dummy);
 211                 handled = 1;
 212         }
 213
 214         return IRQ_RETVAL(handled);
 215 }
 216
 217 /*
 218  * Debug stuff - to be called on NMI, or sysrq key. Use at your own risk;
 219  * reentering NCR5380_print_status seems to have ugly side effects
 220  */
 221
 222 /* this doesn't seem to get used at all -- sam */
 223 #if 0
 224 void sun3_sun3_debug (void)
 225 {
 226         unsigned long flags;
 227
 228         if (default_instance) {
 229                         local_irq_save(flags);
 230                         NCR5380_print_status(default_instance);
 231                         local_irq_restore(flags);
 232         }
 233 }
 234 #endif
 235
 236
 237 /* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */
 238 static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)
 239 {
 240         void *addr;
 241
 242         if(sun3_dma_orig_addr != NULL)
 243                 dvma_unmap(sun3_dma_orig_addr);
 244
 245 #ifdef SUN3_SCSI_VME
 246         addr = (void *)dvma_map_vme((unsigned long) data, count);
 247 #else
 248         addr = (void *)dvma_map((unsigned long) data, count);
 249 #endif
 250
 251         sun3_dma_orig_addr = addr;
 252         sun3_dma_orig_count = count;
 253
 254 #ifndef SUN3_SCSI_VME
 255         dregs->fifo_count = 0;
 256         sun3_udc_write(UDC_RESET, UDC_CSR);
 257
 258         /* reset fifo */
 259         dregs->csr &= ~CSR_FIFO;
 260         dregs->csr |= CSR_FIFO;
 261 #endif
 262
 263         /* set direction */
 264         if(write_flag)
 265                 dregs->csr |= CSR_SEND;
 266         else
 267                 dregs->csr &= ~CSR_SEND;
 268
 269 #ifdef SUN3_SCSI_VME
 270         dregs->csr |= CSR_PACK_ENABLE;
 271
 272         dregs->dma_addr_hi = ((unsigned long)addr >> 16);
 273         dregs->dma_addr_lo = ((unsigned long)addr & 0xffff);
 274
 275         dregs->dma_count_hi = 0;
 276         dregs->dma_count_lo = 0;
 277         dregs->fifo_count_hi = 0;
 278         dregs->fifo_count = 0;
 279 #else
 280         /* byte count for fifo */
 281         dregs->fifo_count = count;
 282
 283         sun3_udc_write(UDC_RESET, UDC_CSR);
 284
 285         /* reset fifo */
 286         dregs->csr &= ~CSR_FIFO;
 287         dregs->csr |= CSR_FIFO;
 288
 289         if(dregs->fifo_count != count) {
 290                 printk("scsi%d: fifo_mismatch %04x not %04x\n",
 291                        default_instance->host_no, dregs->fifo_count,
 292                        (unsigned int) count);
 293                 NCR5380_dprint(NDEBUG_DMA, default_instance);
 294         }
 295
 296         /* setup udc */
 297         udc_regs->addr_hi = (((unsigned long)(addr) & 0xff0000) >> 8);
 298         udc_regs->addr_lo = ((unsigned long)(addr) & 0xffff);
 299         udc_regs->count = count/2; /* count in words */
 300         udc_regs->mode_hi = UDC_MODE_HIWORD;
 301         if(write_flag) {
 302                 if(count & 1)
 303                         udc_regs->count++;
 304                 udc_regs->mode_lo = UDC_MODE_LSEND;
 305                 udc_regs->rsel = UDC_RSEL_SEND;
 306         } else {
 307                 udc_regs->mode_lo = UDC_MODE_LRECV;
 308                 udc_regs->rsel = UDC_RSEL_RECV;
 309         }
 310
 311         /* announce location of regs block */
 312         sun3_udc_write(((dvma_vtob(udc_regs) & 0xff0000) >> 8),
 313                        UDC_CHN_HI);
 314
 315         sun3_udc_write((dvma_vtob(udc_regs) & 0xffff), UDC_CHN_LO);
 316
 317         /* set dma master on */
 318         sun3_udc_write(0xd, UDC_MODE);
 319
 320         /* interrupt enable */
 321         sun3_udc_write(UDC_INT_ENABLE, UDC_CSR);
 322 #endif
 323
 324         return count;
 325
 326 }
 327
 328 #ifndef SUN3_SCSI_VME
 329 static inline unsigned long sun3scsi_dma_count(struct Scsi_Host *instance)
 330 {
 331         unsigned short resid;
 332
 333         dregs->udc_addr = 0x32;
 334         udelay(SUN3_DMA_DELAY);
 335         resid = dregs->udc_data;
 336         udelay(SUN3_DMA_DELAY);
 337         resid *= 2;
 338
 339         return (unsigned long) resid;
 340 }
 341 #endif
 342
 343 static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)
 344 {
 345         return last_residual;
 346 }
 347
 348 static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted,
 349                                                   struct scsi_cmnd *cmd,
 350                                                   int write_flag)
 351 {
 352         if (cmd->request->cmd_type == REQ_TYPE_FS)
 353                 return wanted;
 354         else
 355                 return 0;
 356 }
 357
 358 static inline int sun3scsi_dma_start(unsigned long count, unsigned char *data)
 359 {
 360 #ifdef SUN3_SCSI_VME
 361         unsigned short csr;
 362
 363         csr = dregs->csr;
 364
 365         dregs->dma_count_hi = (sun3_dma_orig_count >> 16);
 366         dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff);
 367
 368         dregs->fifo_count_hi = (sun3_dma_orig_count >> 16);
 369         dregs->fifo_count = (sun3_dma_orig_count & 0xffff);
 370
 371 /*      if(!(csr & CSR_DMA_ENABLE))
 372  *              dregs->csr |= CSR_DMA_ENABLE;
 373  */
 374 #else
 375     sun3_udc_write(UDC_CHN_START, UDC_CSR);
 376 #endif
 377
 378     return 0;
 379 }
 380
 381 /* clean up after our dma is done */
 382 static int sun3scsi_dma_finish(int write_flag)
 383 {
 384         unsigned short __maybe_unused count;
 385         unsigned short fifo;
 386         int ret = 0;
 387
 388         sun3_dma_active = 0;
 389
 390 #ifdef SUN3_SCSI_VME
 391         dregs->csr &= ~CSR_DMA_ENABLE;
 392
 393         fifo = dregs->fifo_count;
 394         if (write_flag) {
 395                 if ((fifo > 0) && (fifo < sun3_dma_orig_count))
 396                         fifo++;
 397         }
 398
 399         last_residual = fifo;
 400         /* empty bytes from the fifo which didn't make it */
 401         if ((!write_flag) && (dregs->csr & CSR_LEFT)) {
 402                 unsigned char *vaddr;
 403
 404                 vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);
 405
 406                 vaddr += (sun3_dma_orig_count - fifo);
 407                 vaddr--;
 408
 409                 switch (dregs->csr & CSR_LEFT) {
 410                 case CSR_LEFT_3:
 411                         *vaddr = (dregs->bpack_lo & 0xff00) >> 8;
 412                         vaddr--;
 413
 414                 case CSR_LEFT_2:
 415                         *vaddr = (dregs->bpack_hi & 0x00ff);
 416                         vaddr--;
 417
 418                 case CSR_LEFT_1:
 419                         *vaddr = (dregs->bpack_hi & 0xff00) >> 8;
 420                         break;
 421                 }
 422         }
 423 #else
 424         // check to empty the fifo on a read
 425         if(!write_flag) {
 426                 int tmo = 20000; /* .2 sec */
 427
 428                 while(1) {
 429                         if(dregs->csr & CSR_FIFO_EMPTY)
 430                                 break;
 431
 432                         if(--tmo <= 0) {
 433                                 printk("sun3scsi: fifo failed to empty!\n");
 434                                 return 1;
 435                         }
 436                         udelay(10);
 437                 }
 438         }
 439
 440         count = sun3scsi_dma_count(default_instance);
 441
 442         fifo = dregs->fifo_count;
 443         last_residual = fifo;
 444
 445         /* empty bytes from the fifo which didn't make it */
 446         if((!write_flag) && (count - fifo) == 2) {
 447                 unsigned short data;
 448                 unsigned char *vaddr;
 449
 450                 data = dregs->fifo_data;
 451                 vaddr = (unsigned char *)dvma_btov(sun3_dma_orig_addr);
 452
 453                 vaddr += (sun3_dma_orig_count - fifo);
 454
 455                 vaddr[-2] = (data & 0xff00) >> 8;
 456                 vaddr[-1] = (data & 0xff);
 457         }
 458 #endif
 459
 460         dvma_unmap(sun3_dma_orig_addr);
 461         sun3_dma_orig_addr = NULL;
 462
 463 #ifdef SUN3_SCSI_VME
 464         dregs->dma_addr_hi = 0;
 465         dregs->dma_addr_lo = 0;
 466         dregs->dma_count_hi = 0;
 467         dregs->dma_count_lo = 0;
 468
 469         dregs->fifo_count = 0;
 470         dregs->fifo_count_hi = 0;
 471
 472         dregs->csr &= ~CSR_SEND;
 473 /*      dregs->csr |= CSR_DMA_ENABLE; */
 474 #else
 475         sun3_udc_write(UDC_RESET, UDC_CSR);
 476         dregs->fifo_count = 0;
 477         dregs->csr &= ~CSR_SEND;
 478
 479         /* reset fifo */
 480         dregs->csr &= ~CSR_FIFO;
 481         dregs->csr |= CSR_FIFO;
 482 #endif
 483
 484         sun3_dma_setup_done = NULL;
 485
 486         return ret;
 487
 488 }
 489
 490 #include "atari_NCR5380.c"
 491
 492 #ifdef SUN3_SCSI_VME
 493 #define SUN3_SCSI_NAME          "Sun3 NCR5380 VME SCSI"
 494 #define DRV_MODULE_NAME         "sun3_scsi_vme"
 495 #else
 496 #define SUN3_SCSI_NAME          "Sun3 NCR5380 SCSI"
 497 #define DRV_MODULE_NAME         "sun3_scsi"
 498 #endif
 499
 500 #define PFX                     DRV_MODULE_NAME ": "
 501
 502 static struct scsi_host_template sun3_scsi_template = {
 503         .module                 = THIS_MODULE,
 504         .proc_name              = DRV_MODULE_NAME,
 505         .show_info              = sun3scsi_show_info,
 506         .name                   = SUN3_SCSI_NAME,
 507         .info                   = sun3scsi_info,
 508         .queuecommand           = sun3scsi_queue_command,
 509         .eh_abort_handler       = sun3scsi_abort,
 510         .eh_bus_reset_handler   = sun3scsi_bus_reset,
 511         .can_queue              = 16,
 512         .this_id                = 7,
 513         .sg_tablesize           = SG_NONE,
 514         .cmd_per_lun            = 2,
 515         .use_clustering         = DISABLE_CLUSTERING
 516 };
 517
 518 static int __init sun3_scsi_probe(struct platform_device *pdev)
 519 {
 520         struct Scsi_Host *instance;
 521         int error;
 522         struct resource *irq, *mem;
 523         unsigned char *ioaddr;
 524         int host_flags = 0;
 525 #ifdef SUN3_SCSI_VME
 526         int i;
 527 #endif
 528
 529         if (setup_can_queue > 0)
 530                 sun3_scsi_template.can_queue = setup_can_queue;
 531         if (setup_cmd_per_lun > 0)
 532                 sun3_scsi_template.cmd_per_lun = setup_cmd_per_lun;
 533         if (setup_sg_tablesize >= 0)
 534                 sun3_scsi_template.sg_tablesize = setup_sg_tablesize;
 535         if (setup_hostid >= 0)
 536                 sun3_scsi_template.this_id = setup_hostid & 7;
 537
 538 #ifdef SUN3_SCSI_VME
 539         ioaddr = NULL;
 540         for (i = 0; i < 2; i++) {
 541                 unsigned char x;
 542
 543                 irq = platform_get_resource(pdev, IORESOURCE_IRQ, i);
 544                 mem = platform_get_resource(pdev, IORESOURCE_MEM, i);
 545                 if (!irq || !mem)
 546                         break;
 547
 548                 ioaddr = sun3_ioremap(mem->start, resource_size(mem),
 549                                       SUN3_PAGE_TYPE_VME16);
 550                 dregs = (struct sun3_dma_regs *)(ioaddr + 8);
 551
 552                 if (sun3_map_test((unsigned long)dregs, &x)) {
 553                         unsigned short oldcsr;
 554
 555                         oldcsr = dregs->csr;
 556                         dregs->csr = 0;
 557                         udelay(SUN3_DMA_DELAY);
 558                         if (dregs->csr == 0x1400)
 559                                 break;
 560
 561                         dregs->csr = oldcsr;
 562                 }
 563
 564                 iounmap(ioaddr);
 565                 ioaddr = NULL;
 566         }
 567         if (!ioaddr)
 568                 return -ENODEV;
 569 #else
 570         irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 571         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 572         if (!irq || !mem)
 573                 return -ENODEV;
 574
 575         ioaddr = ioremap(mem->start, resource_size(mem));
 576         dregs = (struct sun3_dma_regs *)(ioaddr + 8);
 577
 578         udc_regs = dvma_malloc(sizeof(struct sun3_udc_regs));
 579         if (!udc_regs) {
 580                 pr_err(PFX "couldn't allocate DVMA memory!\n");
 581                 iounmap(ioaddr);
 582                 return -ENOMEM;
 583         }
 584 #endif
 585
 586         sun3_scsi_regp = ioaddr;
 587
 588         instance = scsi_host_alloc(&sun3_scsi_template,
 589                                    sizeof(struct NCR5380_hostdata));
 590         if (!instance) {
 591                 error = -ENOMEM;
 592                 goto fail_alloc;
 593         }
 594         default_instance = instance;
 595
 596         instance->io_port = (unsigned long)ioaddr;
 597         instance->irq = irq->start;
 598
 599 #ifdef SUPPORT_TAGS
 600         host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0;
 601 #endif
 602
 603         NCR5380_init(instance, host_flags);
 604
 605         error = request_irq(instance->irq, scsi_sun3_intr, 0,
 606                             "NCR5380", instance);
 607         if (error) {
 608 #ifdef REAL_DMA
 609                 pr_err(PFX "scsi%d: IRQ %d not free, bailing out\n",
 610                        instance->host_no, instance->irq);
 611                 goto fail_irq;
 612 #else
 613                 pr_warn(PFX "scsi%d: IRQ %d not free, interrupts disabled\n",
 614                         instance->host_no, instance->irq);
 615                 instance->irq = NO_IRQ;
 616 #endif
 617         }
 618
 619         dregs->csr = 0;
 620         udelay(SUN3_DMA_DELAY);
 621         dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR;
 622         udelay(SUN3_DMA_DELAY);
 623         dregs->fifo_count = 0;
 624 #ifdef SUN3_SCSI_VME
 625         dregs->fifo_count_hi = 0;
 626         dregs->dma_addr_hi = 0;
 627         dregs->dma_addr_lo = 0;
 628         dregs->dma_count_hi = 0;
 629         dregs->dma_count_lo = 0;
 630
 631         dregs->ivect = VME_DATA24 | (instance->irq & 0xff);
 632 #endif
 633
 634 #ifdef RESET_BOOT
 635         sun3_scsi_reset_boot(instance);
 636 #endif
 637
 638         error = scsi_add_host(instance, NULL);
 639         if (error)
 640                 goto fail_host;
 641
 642         platform_set_drvdata(pdev, instance);
 643
 644         scsi_scan_host(instance);
 645         return 0;
 646
 647 fail_host:
 648         if (instance->irq != NO_IRQ)
 649                 free_irq(instance->irq, instance);
 650 fail_irq:
 651         NCR5380_exit(instance);
 652         scsi_host_put(instance);
 653 fail_alloc:
 654         if (udc_regs)
 655                 dvma_free(udc_regs);
 656         iounmap(sun3_scsi_regp);
 657         return error;
 658 }
 659
 660 static int __exit sun3_scsi_remove(struct platform_device *pdev)
 661 {
 662         struct Scsi_Host *instance = platform_get_drvdata(pdev);
 663
 664         scsi_remove_host(instance);
 665         if (instance->irq != NO_IRQ)
 666                 free_irq(instance->irq, instance);
 667         NCR5380_exit(instance);
 668         scsi_host_put(instance);
 669         if (udc_regs)
 670                 dvma_free(udc_regs);
 671         iounmap(sun3_scsi_regp);
 672         return 0;
 673 }
 674
 675 static struct platform_driver sun3_scsi_driver = {
 676         .remove = __exit_p(sun3_scsi_remove),
 677         .driver = {
 678                 .name   = DRV_MODULE_NAME,
 679         },
 680 };
 681
 682 module_platform_driver_probe(sun3_scsi_driver, sun3_scsi_probe);
 683
 684 MODULE_ALIAS("platform:" DRV_MODULE_NAME);
 685 MODULE_LICENSE("GPL");