mirror of https://github.com/lianthony/NT4.0
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
261 lines
7.2 KiB
261 lines
7.2 KiB
/*****************************************************************************
|
|
*
|
|
* COPYRIGHT 1993 - COLORADO MEMORY SYSTEMS, INC.
|
|
* ALL RIGHTS RESERVED.
|
|
*
|
|
******************************************************************************
|
|
*
|
|
* FILE: \SE\DRIVER\DEVICE\JUMBO\SRC\0X11041.C
|
|
*
|
|
* FUNCTION: cqd_SendByte
|
|
*
|
|
* PURPOSE: Transmit a command to the tape drive using step pulses
|
|
* generated by the FDC.
|
|
*
|
|
* Using the Present Cylinder Number (pcn) of the FDC
|
|
* calculate a New Cylinder Number (ncn) that will make
|
|
* the FDC generate the number of step pulses corresponding
|
|
* to the command byte.
|
|
*
|
|
* Execute a Seek with the FDC.
|
|
*
|
|
* Sense Interrupt dStatus of the FDC and make sure that the
|
|
* pcn concurs with the ncn, which indicates that the correct
|
|
* number of step pulses were issued.
|
|
*
|
|
* HISTORY:
|
|
* $Log: J:\se.vcs\driver\q117cd\src\0x11041.c $
|
|
*
|
|
* Rev 1.14 20 Apr 1994 16:28:20 BOBLEHMA
|
|
* Added a call to kdi_QIC117ClearIRQ for the case when sleep returns from
|
|
* a timeout, (after the sense interrupt status). There are cases when the
|
|
* sleep returns from a timeout, but the interrupt in the trakker is still
|
|
* latched and must be cleared.
|
|
*
|
|
* Rev 1.13 23 Feb 1994 17:08:34 KEVINKES
|
|
* Added a reset FDC to the endo fo send byte to clear out any
|
|
* state errors in the controller due to a timeout on the seek
|
|
* interrupt.
|
|
*
|
|
* Rev 1.12 04 Feb 1994 14:27:24 KURTGODW
|
|
* Changed ifdef dbg to if dbg for NT
|
|
*
|
|
* Rev 1.11 27 Jan 1994 15:48:34 KEVINKES
|
|
* Modified debug code.
|
|
*
|
|
* Rev 1.10 21 Jan 1994 18:23:12 KEVINKES
|
|
* Fixed compiler warnings.
|
|
*
|
|
* Rev 1.9 18 Jan 1994 16:19:08 KEVINKES
|
|
* Updated debug code.
|
|
*
|
|
* Rev 1.8 11 Jan 1994 15:20:18 KEVINKES
|
|
* Added call to CLearInterruptEvent.
|
|
*
|
|
* Rev 1.7 13 Dec 1993 16:01:00 KEVINKES
|
|
* Removed the format code.
|
|
*
|
|
* Rev 1.6 23 Nov 1993 18:49:08 KEVINKES
|
|
* Modified CHECKED_DUMP calls for debugging over the serial port.
|
|
*
|
|
* Rev 1.5 15 Nov 1993 16:20:42 KEVINKES
|
|
* Added abort handling.
|
|
*
|
|
* Rev 1.4 12 Nov 1993 13:43:36 KEVINKES
|
|
* Removed the abort code.
|
|
*
|
|
* Rev 1.3 11 Nov 1993 15:20:56 KEVINKES
|
|
* Changed calls to cqd_inp and cqd_outp to kdi_ReadPort and kdi_WritePort.
|
|
* Modified the parameters to these calls. Changed FDC commands to be
|
|
* defines.
|
|
*
|
|
* Rev 1.2 08 Nov 1993 14:05:58 KEVINKES
|
|
* Removed all bit-field structures, removed all enumerated types, changed
|
|
* all defines to uppercase, and removed all signed data types wherever
|
|
* possible.
|
|
*
|
|
* Rev 1.1 25 Oct 1993 14:24:32 KEVINKES
|
|
* Added a sense interrupt status for timeout errors.
|
|
*
|
|
* Rev 1.0 18 Oct 1993 17:25:40 KEVINKES
|
|
* Initial Revision.
|
|
*
|
|
*****************************************************************************/
|
|
#define FCT_ID 0x11041
|
|
#include "include\public\adi_api.h"
|
|
#include "include\public\frb_api.h"
|
|
#include "include\private\kdi_pub.h"
|
|
#include "include\private\cqd_pub.h"
|
|
#include "q117cd\include\cqd_defs.h"
|
|
#include "q117cd\include\cqd_strc.h"
|
|
#include "q117cd\include\cqd_hdr.h"
|
|
/*endinclude*/
|
|
|
|
dStatus cqd_SendByte
|
|
(
|
|
/* INPUT PARAMETERS: */
|
|
|
|
CqdContextPtr cqd_context,
|
|
dUByte command
|
|
|
|
/* UPDATE PARAMETERS: */
|
|
|
|
/* OUTPUT PARAMETERS: */
|
|
|
|
)
|
|
/* COMMENTS: *****************************************************************
|
|
*
|
|
* DEFINITIONS: *************************************************************/
|
|
{
|
|
|
|
/* DATA: ********************************************************************/
|
|
|
|
dStatus status=DONT_PANIC; /* dStatus or error condition.*/
|
|
SeekCmd seek;
|
|
SnsIntCmd sense_int;
|
|
FDCResult result;
|
|
#if DBG
|
|
dBoolean save;
|
|
#endif
|
|
|
|
/* CODE: ********************************************************************/
|
|
|
|
#if DBG
|
|
/* Lockout commands used to receive the status */
|
|
save = cqd_context->dbg_lockout;
|
|
cqd_context->dbg_lockout = dTRUE;
|
|
#endif
|
|
|
|
if (command >= MAX_FDC_SEEK) {
|
|
|
|
#if DBG
|
|
cqd_context->dbg_lockout = save;
|
|
#endif
|
|
return kdi_Error(ERR_INVALID_COMMAND, FCT_ID, ERR_SEQ_1);
|
|
|
|
}
|
|
|
|
if (cqd_context->controller_data.fdc_pcn < MAX_FDC_SEEK) {
|
|
|
|
seek.NCN = (dUByte)(cqd_context->controller_data.fdc_pcn + command);
|
|
|
|
} else {
|
|
|
|
seek.NCN = (dUByte)(cqd_context->controller_data.fdc_pcn - command);
|
|
|
|
}
|
|
|
|
seek.cmd = FDC_CMD_SEEK;
|
|
seek.drive = (dUByte)cqd_context->device_cfg.drive_select;
|
|
kdi_ResetInterruptEvent(cqd_context->kdi_context);
|
|
|
|
if ((status = cqd_ProgramFDC(
|
|
cqd_context,
|
|
(dUByte *)&seek,
|
|
sizeof(seek),
|
|
dFALSE)) != DONT_PANIC) {
|
|
|
|
kdi_ClearInterruptEvent(cqd_context->kdi_context);
|
|
#if DBG
|
|
cqd_context->dbg_lockout = save;
|
|
#endif
|
|
cqd_ResetFDC(cqd_context);
|
|
return status;
|
|
|
|
}
|
|
|
|
/* For some unknown reason, we occasionally miss an interrupt. */
|
|
/* Despite the timeout, we still press on as if we received the interrupt. */
|
|
/* Therefore, we go ahead and perform the sense interrupt status. If */
|
|
/* status register 0 is bad, then we assume that we truly did miss the */
|
|
/* interrupt. Otherwise, we go on as if nothing happened. */
|
|
|
|
status = kdi_Sleep(cqd_context->kdi_context, kdi_wt001s, dTRUE);
|
|
|
|
if (kdi_GetErrorType(status) == ERR_KDI_TO_EXPIRED) {
|
|
|
|
sense_int.command = FDC_CMD_SENSE_INT;
|
|
|
|
status = cqd_ProgramFDC(cqd_context,
|
|
(dUByte *)&sense_int,
|
|
sizeof(SnsIntCmd),
|
|
dFALSE);
|
|
|
|
kdi_QIC117ClearIRQ( cqd_context->kdi_context );
|
|
}
|
|
|
|
if (status == DONT_PANIC) {
|
|
|
|
if ((status = cqd_ReadFDC(
|
|
cqd_context,
|
|
(dUByte *)&result,
|
|
sizeof(result))) != DONT_PANIC) {
|
|
|
|
#if DBG
|
|
cqd_context->dbg_lockout = save;
|
|
#endif
|
|
return status;
|
|
|
|
} else {
|
|
|
|
/* If the sense interrupt status is O.K., then proceed as if */
|
|
/* nothing happened. If, however, there is an error returned by */
|
|
/* status register 0, then return a FDCFLT. */
|
|
|
|
if (! (result.ST0 & ST0_IC)) {
|
|
|
|
/* If we timed out, then we did the sense interrupt status */
|
|
/* without clearing the interrupt from the interrupt controller. */
|
|
/* Since the FDC did not indicate an error, we assume that we */
|
|
/* missed the interrupt and send the EOI. Only needed for an */
|
|
/* 82072. */
|
|
|
|
if (kdi_GetInterfaceType(cqd_context->kdi_context) != MICRO_CHANNEL) {
|
|
|
|
if (result.ST0 !=
|
|
(dUByte)(cqd_context->device_cfg.drive_select | ST0_SE)) {
|
|
|
|
#if DBG
|
|
cqd_context->dbg_lockout = save;
|
|
#endif
|
|
return kdi_Error(ERR_FDC_FAULT, FCT_ID, ERR_SEQ_1);
|
|
|
|
}
|
|
}
|
|
|
|
if (seek.NCN != result.PCN) {
|
|
|
|
#if DBG
|
|
cqd_context->dbg_lockout = save;
|
|
#endif
|
|
return kdi_Error(ERR_CMD_FAULT, FCT_ID, ERR_SEQ_1);
|
|
|
|
}
|
|
|
|
cqd_context->controller_data.fdc_pcn = result.PCN;
|
|
|
|
} else {
|
|
|
|
#if DBG
|
|
cqd_context->dbg_lockout = save;
|
|
#endif
|
|
return kdi_Error(ERR_FDC_FAULT, FCT_ID, ERR_SEQ_2);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
cqd_ResetFDC(cqd_context);
|
|
|
|
}
|
|
|
|
#if DBG
|
|
cqd_context->dbg_lockout = save;
|
|
DBG_ADD_ENTRY(QIC117SHOWMCMDS, (CqdContextPtr)cqd_context, DBG_SEND_BYTE);
|
|
DBG_ADD_ENTRY(QIC117SHOWMCMDS, (CqdContextPtr)cqd_context, (dUByte)command);
|
|
#endif
|
|
|
|
return status;
|
|
}
|