return 1;}void my_done( int error ){   if (in_command) {      in_command = 0;      outb( 0x00, Interrupt_Cntl_port );      fdomain_make_bus_idle();      current_SC->result = error;      if (current_SC->scsi_done)	    current_SC->scsi_done( current_SC );      else panic( "Future Domain: current_SC->scsi_done() == NULL" );   } else {      panic( "Future Domain: my_done() called outside of command\n" );   }#if DEBUG_RACE   in_interrupt_flag = 0;#endif}void fdomain_16x0_intr( int unused ){   int      status;   int      done = 0;   unsigned data_count;   sti();      outb( 0x00, Interrupt_Cntl_port );   /* We usually have one spurious interrupt after each command.  Ignore it. */   if (!in_command || !current_SC) {	/* Spurious interrupt */#if EVERY_ACCESS      printk( "Spurious interrupt, in_command = %d, current_SC = %x\n",	      in_command, current_SC );#endif      return;   }   /* Abort calls my_done, so we do nothing here. */   if (current_SC->SCp.phase & aborted) {#if DEBUG_ABORT      printk( "Interrupt after abort, ignoring\n" );#endif      /*      return; */   }#if DEBUG_RACE   ++in_interrupt_flag;#endif   if (current_SC->SCp.phase & in_arbitration) {      status = inb( TMC_Status_port );        /* Read adapter status */      if (!(status & 0x02)) {#if EVERY_ACCESS	 printk( " AFAIL " );#endif	 my_done( DID_BUS_BUSY << 16 );	 return;      }      current_SC->SCp.phase = in_selection;            outb( 0x40 | FIFO_COUNT, Interrupt_Cntl_port );      outb( 0x82, SCSI_Cntl_port ); /* Bus Enable + Select */      outb( adapter_mask | (1 << current_SC->target), SCSI_Data_NoACK_port );            /* Stop arbitration and enable parity */      outb( 0x10 | PARITY_MASK, TMC_Cntl_port );#if DEBUG_RACE      in_interrupt_flag = 0;#endif      return;   } else if (current_SC->SCp.phase & in_selection) {      status = inb( SCSI_Status_port );      if (!(status & 0x01)) {	 /* Try again, for slow devices */	 if (fdomain_select( current_SC->target )) {#if EVERY_ACCESS	    printk( " SFAIL " );#endif	    my_done( DID_NO_CONNECT << 16 );	    return;	 } else {#if EVERY_ACCESS	    printk( " AltSel " );#endif	    /* Stop arbitration and enable parity */	    outb( 0x10 | PARITY_MASK, TMC_Cntl_port );	 }      }      current_SC->SCp.phase = in_other;      outb( 0x90 | FIFO_COUNT, Interrupt_Cntl_port );      outb( 0x80, SCSI_Cntl_port );#if DEBUG_RACE      in_interrupt_flag = 0;#endif      return;   }      /* current_SC->SCp.phase == in_other: this is the body of the routine */      status = inb( SCSI_Status_port );      if (status & 0x10) {	/* REQ */            switch (status & 0x0e) {             case 0x08:		/* COMMAND OUT */	 outb( current_SC->cmnd[current_SC->SCp.sent_command++],	       Write_SCSI_Data_port );#if EVERY_ACCESS	 printk( "CMD = %x,",		 current_SC->cmnd[ current_SC->SCp.sent_command - 1] );#endif	 break;      case 0x00:		/* DATA OUT -- tmc18c50 only */	 if (chip != tmc1800 && !current_SC->SCp.have_data_in) {	    current_SC->SCp.have_data_in = -1;	    outb( 0xd0 | PARITY_MASK, TMC_Cntl_port );	 }	 break;      case 0x04:		/* DATA IN -- tmc18c50 only */	 if (chip != tmc1800 && !current_SC->SCp.have_data_in) {	    current_SC->SCp.have_data_in = 1;	    outb( 0x90 | PARITY_MASK, TMC_Cntl_port );	 }	 break;      case 0x0c:		/* STATUS IN */	 current_SC->SCp.Status = inb( Read_SCSI_Data_port );#if EVERY_ACCESS	 printk( "Status = %x, ", current_SC->SCp.Status );#endif#if ERRORS_ONLY	 if (current_SC->SCp.Status && current_SC->SCp.Status != 2) {	    printk( "Future Domain: target = %d, command = %x, "		    "Status = %x\n",		    current_SC->target, current_SC->cmnd[0],		    current_SC->SCp.Status );	 }#endif	       break;      case 0x0a:		/* MESSAGE OUT */	 outb( MESSAGE_REJECT, Write_SCSI_Data_port ); /* Reject */	 break;      case 0x0e:		/* MESSAGE IN */	 current_SC->SCp.Message = inb( Read_SCSI_Data_port );#if EVERY_ACCESS	 printk( "Message = %x, ", current_SC->SCp.Message );#endif	 if (!current_SC->SCp.Message) ++done;#if DEBUG_MESSAGES || EVERY_ACCESS	 if (current_SC->SCp.Message) {	    printk( "Future Domain: Message = %x\n",		    current_SC->SCp.Message );	 }#endif	 break;      }   }   if (chip == tmc1800       && !current_SC->SCp.have_data_in       && (current_SC->SCp.sent_command	   >= COMMAND_SIZE( current_SC->cmnd[ 0 ] ))) {				/* We have to get the FIFO direction				   correct, so I've made a table based				   on the SCSI Standard of which commands				   appear to require a DATA OUT phase.				 */      /*	p. 94: Command for all device types	CHANGE DEFINITION            40 DATA OUT	COMPARE                      39 DATA OUT	COPY                         18 DATA OUT	COPY AND VERIFY              3a DATA OUT	INQUIRY                      12 	LOG SELECT                   4c DATA OUT	LOG SENSE                    4d	MODE SELECT (6)              15 DATA OUT	MODE SELECT (10)             55 DATA OUT	MODE SENSE (6)               1a	MODE SENSE (10)              5a	READ BUFFER                  3c	RECEIVE DIAGNOSTIC RESULTS   1c	REQUEST SENSE                03	SEND DIAGNOSTIC              1d DATA OUT	TEST UNIT READY              00	WRITE BUFFER                 3b DATA OUT	p.178: Commands for direct-access devices (not listed on p. 94)	FORMAT UNIT                  04 DATA OUT	LOCK-UNLOCK CACHE            36	PRE-FETCH                    34	PREVENT-ALLOW MEDIUM REMOVAL 1e	READ (6)/RECEIVE             08	READ (10)                    3c	READ CAPACITY                25	READ DEFECT DATA (10)        37	READ LONG                    3e	REASSIGN BLOCKS              07 DATA OUT	RELEASE                      17	RESERVE                      16 DATA OUT	REZERO UNIT/REWIND           01	SEARCH DATA EQUAL (10)       31 DATA OUT	SEARCH DATA HIGH (10)        30 DATA OUT	SEARCH DATA LOW (10)         32 DATA OUT	SEEK (6)                     0b	SEEK (10)                    2b	SET LIMITS (10)              33	START STOP UNIT              1b	SYNCHRONIZE CACHE            35	VERIFY (10)                  2f	WRITE (6)/PRINT/SEND         0a DATA OUT	WRITE (10)/SEND              2a DATA OUT	WRITE AND VERIFY (10)        2e DATA OUT	WRITE LONG                   3f DATA OUT	WRITE SAME                   41 DATA OUT ?	p. 261: Commands for sequential-access devices (not previously listed)	ERASE                        19	LOAD UNLOAD                  1b	LOCATE                       2b	READ BLOCK LIMITS            05	READ POSITION                34	READ REVERSE                 0f	RECOVER BUFFERED DATA        14	SPACE                        11	WRITE FILEMARKS              10 ?	p. 298: Commands for printer devices (not previously listed)	****** NOT SUPPORTED BY THIS DRIVER, since 0b is SEEK (6) *****	SLEW AND PRINT               0b DATA OUT  -- same as seek	STOP PRINT                   1b	SYNCHRONIZE BUFFER           10	p. 315: Commands for processor devices (not previously listed)		p. 321: Commands for write-once devices (not previously listed)	MEDIUM SCAN                  38	READ (12)                    a8	SEARCH DATA EQUAL (12)       b1 DATA OUT	SEARCH DATA HIGH (12)        b0 DATA OUT	SEARCH DATA LOW (12)         b2 DATA OUT	SET LIMITS (12)              b3	VERIFY (12)                  af	WRITE (12)                   aa DATA OUT	WRITE AND VERIFY (12)        ae DATA OUT	p. 332: Commands for CD-ROM devices (not previously listed)	PAUSE/RESUME                 4b	PLAY AUDIO (10)              45	PLAY AUDIO (12)              a5	PLAY AUDIO MSF               47	PLAY TRACK RELATIVE (10)     49	PLAY TRACK RELATIVE (12)     a9	READ HEADER                  44	READ SUB-CHANNEL             42	READ TOC                     43	p. 370: Commands for scanner devices (not previously listed)	GET DATA BUFFER STATUS       34	GET WINDOW                   25	OBJECT POSITION              31	SCAN                         1b	SET WINDOW                   24 DATA OUT	p. 391: Commands for optical memory devices (not listed)	ERASE (10)                   2c	ERASE (12)                   ac	MEDIUM SCAN                  38 DATA OUT	READ DEFECT DATA (12)        b7	READ GENERATION              29	READ UPDATED BLOCK           2d	UPDATE BLOCK                 3d DATA OUT	p. 419: Commands for medium changer devices (not listed)	EXCHANGE MEDIUM              46	INITIALIZE ELEMENT STATUS    07	MOVE MEDIUM                  a5	POSITION TO ELEMENT          2b	READ ELEMENT STATUS          b8	REQUEST VOL. ELEMENT ADDRESS b5	SEND VOLUME TAG              b6 DATA OUT	p. 454: Commands for communications devices (not listed previously)	GET MESSAGE (6)              08	GET MESSAGE (10)             28	GET MESSAGE (12)             a8      */	      switch (current_SC->cmnd[0]) {      case CHANGE_DEFINITION: case COMPARE:         case COPY:      case COPY_VERIFY:       case LOG_SELECT:      case MODE_SELECT:      case MODE_SELECT_10:    case SEND_DIAGNOSTIC: case WRITE_BUFFER:      case FORMAT_UNIT:       case REASSIGN_BLOCKS: case RESERVE:      case SEARCH_EQUAL:      case SEARCH_HIGH:     case SEARCH_LOW:      case WRITE_6:           case WRITE_10:        case WRITE_VERIFY:      case 0x3f:              case 0x41:      case 0xb1:              case 0xb0:            case 0xb2:      case 0xaa:              case 0xae:      case 0x24:      case 0x38:              case 0x3d:      case 0xb6:	       case 0xea:		/* alternate number for WRITE LONG */	 	 current_SC->SCp.have_data_in = -1;	 outb( 0xd0 | PARITY_MASK, TMC_Cntl_port );	 break;      case 0x00:      default:	 	 current_SC->SCp.have_data_in = 1;	 outb( 0x90 | PARITY_MASK, TMC_Cntl_port );	 break;      }   }   if (current_SC->SCp.have_data_in == -1) { /* DATA OUT */      while ( (data_count = 0x2000 - inw( FIFO_Data_Count_port )) > 512 ) {#if EVERY_ACCESS	 printk( "DC=%d, ", data_count ) ;#endif	 if (data_count > current_SC->SCp.this_residual)	       data_count = current_SC->SCp.this_residual;	 if (data_count > 0) {#if EVERY_ACCESS	    printk( "%d OUT, ", data_count );#endif	    if (data_count == 1) {	       outb( *current_SC->SCp.ptr++, Write_FIFO_port );	       --current_SC->SCp.this_residual;	    } else {	       data_count >>= 1;	       outsw( Write_FIFO_port, current_SC->SCp.ptr, data_count );	       current_SC->SCp.ptr += 2 * data_count;	       current_SC->SCp.this_residual -= 2 * data_count;	    }	 }	 if (!current_SC->SCp.this_residual) {	    if (current_SC->SCp.buffers_residual) {	       --current_SC->SCp.buffers_residual;	       ++current_SC->SCp.buffer;	       current_SC->SCp.ptr = current_SC->SCp.buffer->address;	       current_SC->SCp.this_residual = current_SC->SCp.buffer->length;	    } else		  break;	 }      }   }      if (current_SC->SCp.have_data_in == 1) { /* DATA IN */      while ((data_count = inw( FIFO_Data_Count_port )) > 0) {#if EVERY_ACCESS	 printk( "DC=%d, ", data_count );#endif	 if (data_count > current_SC->SCp.this_residual)	       data_count = current_SC->SCp.this_residual;	 if (data_count) {#if EVERY_ACCESS	    printk( "%d IN, ", data_count );#endif