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205 lines
4.8 KiB
205 lines
4.8 KiB
/*****************************************************************************
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*
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* COPYRIGHT 1993 - COLORADO MEMORY SYSTEMS, INC.
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* ALL RIGHTS RESERVED.
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*
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******************************************************************************
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*
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* FILE: \SE\DRIVER\DEVICE\JUMBO\SRC\0X1103B.C
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*
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* FUNCTION: cqd_ReceiveByte
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*
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* PURPOSE: Read a byte/word of response data from the FDC. Response data
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* can be drive error/status information or drive configuration
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* information.
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*
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* Wait for Track 0 from the tape drive to go active. This
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* indicates that the drive is ready to start sending data.
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*
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* Alternate sending Report Next Bit commands to the tape drive
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* and sampling Track 0 (response data) from the tape drive
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* until the proper number of response data bits have been read.
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*
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* Read one final data bit from the tape drive which is the
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* confirmation bit. This bit must be a 1 to confirm the
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* transmission.
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*
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* HISTORY:
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* $Log: J:\se.vcs\driver\q117cd\src\0x1103b.c $
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*
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* Rev 1.6 27 Jan 1994 15:47:50 KEVINKES
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* Modified debug code.
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*
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* Rev 1.5 18 Jan 1994 16:18:58 KEVINKES
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* Updated debug code.
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*
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* Rev 1.4 11 Jan 1994 14:56:36 KEVINKES
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* Cleaned up the DBG_ARRAY code and modified the track 0 timings.
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*
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* Rev 1.3 23 Nov 1993 18:55:00 KEVINKES
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* Modified debug defines to be DBG_ARRAY.
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*
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* Rev 1.2 08 Nov 1993 14:05:34 KEVINKES
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* Removed all bit-field structures, removed all enumerated types, changed
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* all defines to uppercase, and removed all signed data types wherever
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* possible.
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*
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* Rev 1.1 25 Oct 1993 14:39:12 KEVINKES
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* Changed kdi_wt2ticks to kdi_wt004ms.
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*
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* Rev 1.0 18 Oct 1993 17:19:38 KEVINKES
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* Initial Revision.
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*
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*****************************************************************************/
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#define FCT_ID 0x1103b
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#include "include\public\adi_api.h"
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#include "include\public\frb_api.h"
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#include "include\private\kdi_pub.h"
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#include "include\private\cqd_pub.h"
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#include "q117cd\include\cqd_defs.h"
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#include "q117cd\include\cqd_strc.h"
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#include "q117cd\include\cqd_hdr.h"
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/*endinclude*/
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dStatus cqd_ReceiveByte
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(
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/* INPUT PARAMETERS: */
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CqdContextPtr cqd_context,
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dUWord receive_length,
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/* UPDATE PARAMETERS: */
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/* OUTPUT PARAMETERS: */
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dUWordPtr receive_data
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)
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/* COMMENTS: *****************************************************************
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*
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* DEFINITIONS: *************************************************************/
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{
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/* DATA: ********************************************************************/
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dStatus status; /* dStatus or error condition.*/
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dUByte i = 0;
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dUByte stat3;
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dUWord fdc_data= 0;
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#if DBG
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dBoolean save;
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#endif
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/* CODE: ********************************************************************/
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#if DBG
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/* Lockout commands used to receive the status */
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save = cqd_context->dbg_lockout;
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cqd_context->dbg_lockout = dTRUE;
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#endif
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if ((status = cqd_WaitActive(cqd_context)) != DONT_PANIC) {
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#if DBG
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cqd_context->dbg_lockout = save;
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#endif
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return status;
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}
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do {
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if((status = cqd_SendByte(cqd_context, FW_CMD_RPT_NEXT_BIT)) != DONT_PANIC) {
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#if DBG
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cqd_context->dbg_lockout = save;
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#endif
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return status;
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}
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kdi_Sleep(cqd_context->kdi_context,
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INTERVAL_WAIT_ACTIVE,
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dFALSE
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);
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if ((status = cqd_GetStatus(cqd_context, &stat3)) != DONT_PANIC) {
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#if DBG
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cqd_context->dbg_lockout = save;
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#endif
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return status;
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}
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fdc_data >>= 1;
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if (stat3 & ST3_T0) {
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fdc_data |= 0x8000;
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}
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i++;
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} while (i < receive_length);
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/* If the received data is only one byte wide, then shift data to the low */
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/* byte of fdc_data. */
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if (receive_length == READ_BYTE) {
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fdc_data >>= READ_BYTE;
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}
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/* Return the low byte to the caller. */
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((dUByte *)receive_data)[LOW_BYTE] =
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((dUByte *)&fdc_data)[LOW_BYTE];
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/* If the FDC data is a word, then return it to the caller. */
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if (receive_length == READ_WORD) {
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((dUByte *)receive_data)[HI_BYTE] =
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((dUByte *)&fdc_data)[HI_BYTE];
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}
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if ((status = cqd_SendByte(cqd_context, FW_CMD_RPT_NEXT_BIT)) != DONT_PANIC) {
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#if DBG
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cqd_context->dbg_lockout = save;
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#endif
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return status;
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}
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kdi_Sleep(cqd_context->kdi_context, INTERVAL_WAIT_ACTIVE, dFALSE);
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if((status = cqd_GetStatus(cqd_context, &stat3)) != DONT_PANIC) {
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#if DBG
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cqd_context->dbg_lockout = save;
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#endif
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return status;
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}
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if (!(stat3 & (dUByte)ST3_T0)) {
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#if DBG
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cqd_context->dbg_lockout = save;
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#endif
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return kdi_Error(ERR_CMD_OVERRUN, FCT_ID, ERR_SEQ_1);
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}
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#if DBG
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cqd_context->dbg_lockout = save;
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DBG_ADD_ENTRY(QIC117SHOWMCMDS, (CqdContextPtr)cqd_context, DBG_RECEIVE_BYTE);
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DBG_ADD_ENTRY(QIC117SHOWMCMDS, (CqdContextPtr)cqd_context, fdc_data);
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#endif
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return status;
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}
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