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Annotation of ntddk/src/scsi/qic117/resetfdc.c, revision 1.1.1.1

1.1       root        1: /*++
                      2: 
                      3: Copyright (c) 1993 - Colorado Memory Systems,  Inc.
                      4: All Rights Reserved
                      5: 
                      6: Module Name:
                      7: 
                      8:     resetfdc.c
                      9: 
                     10: Abstract:
                     11: 
                     12:     Resets the FDC and cleans up the sense status.
                     13: 
                     14: Revision History:
                     15: 
                     16: 
                     17: 
                     18: 
                     19: --*/
                     20: 
                     21: //
                     22: // include files
                     23: //
                     24: 
                     25: #include <ntddk.h>                        // various NT definitions
                     26: #include <ntdddisk.h>                    // disk device driver I/O control codes
                     27: #include <ntiologc.h>
                     28: #include "common.h"
                     29: #include "drvtask.h"                     // this driver's data declarations
                     30: #include "mt1defs.h"                     // this driver's data declarations
                     31: #include "mt1strc.h"                     // this driver's data declarations
                     32: #include "q117data.h"                    // this driver's data declarations
                     33: 
                     34: 
                     35: VOID
                     36: Q117iResetFDC(
                     37:     IN PTAPE_EXTENSION TapeExtension
                     38:     )
                     39: 
                     40: /*++
                     41: 
                     42: Routine Description:
                     43: 
                     44:     To reset the floppy controller chip.
                     45: 
                     46: Arguments:
                     47: 
                     48:     TapeExtension -
                     49: 
                     50: Return Value -
                     51: 
                     52:     None.
                     53: 
                     54: --*/
                     55: 
                     56: {
                     57:     UCHAR resetByte;
                     58:     SHORT statLength;
                     59:     struct sns_int_cmd senseInt;
                     60:     FDC_STATUS rStat;
                     61:     SHORT resetRetry = 5;
                     62: 
                     63:     senseInt.command = FDC_SNS_INT;
                     64: 
                     65:     TapeExtension->QControllerData->CommandHasResultPhase = FALSE;
                     66:     (VOID) Q117iResetInterruptEvent(TapeExtension);
                     67: 
                     68:     if (!TapeExtension->Found) {
                     69: 
                     70:         TapeExtension->QControllerData->DriveSelect.Selected = FALSE;
                     71: 
                     72:         WRITE_CONTROLLER(
                     73:             &TapeExtension->QControllerData->FDC_Addr->dor, alloff);
                     74:         Q117iShortTimer(t0010us);
                     75:         WRITE_CONTROLLER(
                     76:             &TapeExtension->QControllerData->FDC_Addr->dor,dselb);
                     77: 
                     78:     } else {
                     79: 
                     80:         if (TapeExtension->QControllerData->DriveSelect.Selected == TRUE) {
                     81: 
                     82:             resetByte =
                     83:                 TapeExtension->QControllerData->DriveSelect.SelectByte;
                     84: 
                     85:         } else {
                     86: 
                     87:             resetByte =
                     88:                 TapeExtension->QControllerData->DriveSelect.DeselectByte;
                     89: 
                     90:         }
                     91: 
                     92:         resetByte &= 0xfb;
                     93:         WRITE_CONTROLLER(&TapeExtension->QControllerData->FDC_Addr->dor,
                     94:                         (SHORT)resetByte);
                     95:         Q117iShortTimer(t0010us);
                     96:         resetByte |= 0x0c;
                     97:         WRITE_CONTROLLER(&TapeExtension->QControllerData->FDC_Addr->dor,
                     98:                         (SHORT)resetByte);
                     99: 
                    100:     }
                    101: 
                    102:     if (Q117iSleep(TapeExtension, mt_wt500ms, TRUE) == NoErr) {
                    103: 
                    104:         Q117iReadFDC(TapeExtension, (CHAR *)&rStat, (SHORT *)&statLength);
                    105:         --resetRetry;
                    106: 
                    107:     }
                    108: 
                    109:     do {
                    110: 
                    111:         if (Q117iProgramFDC(TapeExtension,
                    112:                             (CHAR *)&senseInt,
                    113:                             sizeof(senseInt),
                    114:                             FALSE) != NoErr) {
                    115: 
                    116:             TapeExtension->QControllerData->FDC_Pcn = 0;
                    117:             return;
                    118: 
                    119:         }
                    120: 
                    121:         Q117iReadFDC(TapeExtension, (CHAR *)&rStat, (SHORT *)&statLength);
                    122:         --resetRetry;
                    123:         Q117iSleep(TapeExtension, mt_wt2ticks, FALSE);
                    124: 
                    125:     } while (((rStat.ST0 & ST0_US) < 3) && resetRetry);
                    126: 
                    127:     Q117iConfigureFDC(TapeExtension);
                    128:     TapeExtension->QControllerData->FDC_Pcn = 0;
                    129:     TapeExtension->QControllerData->PerpendicularMode = FALSE;
                    130: }
                    131: 

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