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1.1 root 1: /*++
2:
3: Copyright (c) 1993 - Colorado Memory Systems, Inc.
4: All Rights Reserved
5:
6: Module Name:
7:
8: config.c
9:
10: Abstract:
11:
12: configures the FDC and drive to the correct speed.
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: STATUS
36: Q117iConfigureDrive(
37: IN PTAPE_EXTENSION TapeExtension
38: )
39:
40: /*++
41:
42: Routine Description:
43:
44: Configure the tape drive with a pre-defined state.
45:
46: Put the tape drive into the Primary mode. This command should work
47: regardless of the current state of the drive.
48:
49: Set or determine the tape speed depending upon whether or not the
50: tape drive is a CMS drive.
51:
52: Read the current track or set the current track to 0 also depending
53: upon whether or not the tape drive is a CMS drive.
54:
55: Arguments:
56:
57: TapeExtension -
58:
59: Return Value:
60:
61:
62:
63: --*/
64:
65: {
66: STATUS retval = NoErr; // return value
67: CHAR newSpeed; // tape drive transfer rate
68:
69: //
70: // Make sure that the tape drive is out there.
71: //
72:
73: retval = Q117iGetDriveError(TapeExtension);
74:
75: if (retval && retval != NoTape) {
76:
77: return(retval);
78:
79: }
80:
81: //
82: // We will only configure (set the transfer rate) the tape drive if we
83: // know that it is ours. This is because we assume that our drive is
84: // the only variable speed drive available.
85: //
86:
87: if (TapeExtension->SpeedChangeOK) {
88:
89: //
90: // Send the Select_Speed command to the tape drive. This ommand is sent
91: // in 2 parts (cmd - arg) and we must be sure that the drive is ready to
92: // receive the argument before sending it. The drive is ready either when
93: // it starts generating index pusles or after approximately 20 ms.
94: //
95:
96: if ((retval = Q117iSendByte(TapeExtension, Select_Speed)) != NoErr) {
97:
98: return(retval);
99:
100: }
101:
102: Q117iSleep(TapeExtension, mt_wt2ticks, FALSE);
103:
104: if (TapeExtension->XferRate.XferRate == FAST) {
105:
106: newSpeed = TapeExtension->XferRate.TapeFast + 2;
107:
108: } else {
109:
110: newSpeed = TapeExtension->XferRate.TapeSlow + 2;
111:
112: }
113:
114: if ((retval = Q117iSendByte(TapeExtension, newSpeed)) != NoErr) {
115:
116: return(retval);
117:
118: }
119:
120: //
121: // Wait for the drive to become ready again. Specified time is 10
122: // secs.
123: //
124:
125: retval = Q117iWaitCommandComplete(TapeExtension, mt_wt010s);
126:
127: if (retval && retval != NoTape) {
128:
129: return(retval);
130:
131: }
132:
133: //
134: // Set the current track indicator to an unknow position. This will
135: // force a track change command on the first read write to the tape.
136: //
137:
138: TapeExtension->TapePosition.C_Track = -1;
139: }
140:
141: return(NoErr);
142: }
143:
144:
145: STATUS
146: Q117iConfigureFDC(
147: IN PTAPE_EXTENSION TapeExtension
148: )
149:
150: /*++
151:
152: Routine Description:
153:
154: To configure the floppy controller chip according to the current
155: FDC parameters.
156:
157: Arguments:
158:
159: TapeExtension -
160:
161: Return Value:
162:
163:
164: --*/
165:
166: {
167: STATUS retval;
168: CHAR fdcType; // flag to indicate an 82077 FDC
169: struct specify_cmd setup_N;
170: struct config_cmd configure;
171:
172: if (TapeExtension->XferRate.XferRate == FAST) {
173:
174: Q117iDCR_Out(TapeExtension, TapeExtension->XferRate.FDC_Fast);
175:
176: } else {
177:
178: Q117iDCR_Out(TapeExtension, TapeExtension->XferRate.FDC_Slow);
179:
180: }
181:
182:
183: // Determine if the FDC is an 82077
184:
185: if ((retval = Q117iDGetFDC(TapeExtension, (PUCHAR)&fdcType)) != NoErr) {
186:
187: return(retval);
188:
189: }
190:
191: if (fdcType == FDC_82077 ||
192: fdcType == FDC_82077AA ||
193: fdcType == FDC_82078_44 ||
194: fdcType == FDC_82078_64 ||
195: fdcType == FDC_NATIONAL) {
196:
197: WRITE_CONTROLLER(&TapeExtension->QControllerData->FDC_Addr->tdr,
198: curu);
199:
200: if (TapeExtension->XferRate.XferRate == FAST) {
201:
202: WRITE_CONTROLLER(&TapeExtension->QControllerData->FDC_Addr->MSDSR.dsr,
203: TapeExtension->XferRate.FDC_Fast);
204:
205: if (TapeExtension->XferRate.FDC_Fast == FDC_500Kbps) {
206:
207: WRITE_CONTROLLER(&TapeExtension->QControllerData->FDC_Addr->tdr,
208: curb);
209:
210: }
211:
212: } else {
213:
214: WRITE_CONTROLLER(
215: &TapeExtension->QControllerData->FDC_Addr->MSDSR.dsr,
216: TapeExtension->XferRate.FDC_Slow);
217:
218: if (TapeExtension->XferRate.FDC_Slow == FDC_250Kbps) {
219:
220: WRITE_CONTROLLER(
221: &TapeExtension->QControllerData->FDC_Addr->tdr,
222: curb);
223: }
224:
225: if (TapeExtension->XferRate.FDC_Slow == FDC_500Kbps) {
226:
227: WRITE_CONTROLLER(
228: &TapeExtension->QControllerData->FDC_Addr->tdr,
229: curb);
230:
231: }
232: }
233:
234: configure.cmd = FDC_CONFIG;
235: configure.czero = 0;
236: configure.FIFOTHR = FDC_FIFO;
237: configure.POLL = 0;
238: configure.EFIFO = 0;
239: configure.EIS = 0;
240: configure.reserved = 0;
241: configure.PRETRK = 0x00;
242:
243: if (retval = Q117iProgramFDC(TapeExtension,
244: (CHAR *)&configure,
245: sizeof(configure),
246: FALSE)) {
247:
248: return(retval);
249:
250: }
251: }
252:
253: setup_N.command = FDC_SPECIFY;
254: setup_N.SRT_HUT = TapeExtension->XferRate.XferRate ?
255: TapeExtension->XferRate.SRT_Fast :
256: TapeExtension->XferRate.SRT_Slow;
257: setup_N.HLT_ND = 0x02;
258: retval = Q117iProgramFDC(TapeExtension,
259: (CHAR *)&setup_N,
260: sizeof(setup_N),
261: FALSE);
262:
263: return(retval);
264: }
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