summaryrefslogtreecommitdiffstats
path: root/drivers/cdrom/mcdx.c
blob: 07bbd24e3c18c6e33043c55b9fe111149a396a9f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
/*
 * The Mitsumi CDROM interface
 * Copyright (C) 1995 1996 Heiko Schlittermann <heiko@lotte.sax.de>
 * VERSION: 2.14(hs)
 *
 * ... anyway, I'm back again, thanks to Marcin, he adopted
 * large portions of my code (at least the parts containing
 * my main thoughts ...)
 *
 ****************** H E L P *********************************
 * If you ever plan to update your CD ROM drive and perhaps
 * want to sell or simply give away your Mitsumi FX-001[DS]
 * -- Please --
 * mail me (heiko@lotte.sax.de).  When my last drive goes
 * ballistic no more driver support will be available from me!
 *************************************************************
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Thanks to
 *  The Linux Community at all and ...
 *  Martin Harriss (he wrote the first Mitsumi Driver)
 *  Eberhard Moenkeberg (he gave me much support and the initial kick)
 *  Bernd Huebner, Ruediger Helsch (Unifix-Software GmbH, they
 *      improved the original driver)
 *  Jon Tombs, Bjorn Ekwall (module support)
 *  Daniel v. Mosnenck (he sent me the Technical and Programming Reference)
 *  Gerd Knorr (he lent me his PhotoCD)
 *  Nils Faerber and Roger E. Wolff (extensively tested the LU portion)
 *  Andreas Kies (testing the mysterious hang-ups)
 *  Heiko Eissfeldt (VERIFY_READ/WRITE)
 *  Marcin Dalecki (improved performance, shortened code)
 *  ... somebody forgotten?
 *
 *  9 November 1999 -- Make kernel-parameter implementation work with 2.3.x 
 *	               Removed init_module & cleanup_module in favor of 
 *		       module_init & module_exit.
 *		       Torben Mathiasen <tmm@image.dk>
 */


#if RCS
static const char *mcdx_c_version
    = "$Id: mcdx.c,v 1.21 1997/01/26 07:12:59 davem Exp $";
#endif

#include <linux/module.h>

#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/cdrom.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <asm/io.h>
#include <asm/current.h>
#include <asm/uaccess.h>

#include <linux/major.h>
#define MAJOR_NR MITSUMI_X_CDROM_MAJOR
#include <linux/blkdev.h>
#include <linux/devfs_fs_kernel.h>

#include "mcdx.h"

#ifndef HZ
#error HZ not defined
#endif

#define xwarn(fmt, args...) printk(KERN_WARNING MCDX " " fmt, ## args)

#if !MCDX_QUIET
#define xinfo(fmt, args...) printk(KERN_INFO MCDX " " fmt, ## args)
#else
#define xinfo(fmt, args...) { ; }
#endif

#if MCDX_DEBUG
#define xtrace(lvl, fmt, args...) \
		{ if (lvl > 0) \
			{ printk(KERN_DEBUG MCDX ":: " fmt, ## args); } }
#define xdebug(fmt, args...) printk(KERN_DEBUG MCDX ":: " fmt, ## args)
#else
#define xtrace(lvl, fmt, args...) { ; }
#define xdebug(fmt, args...) { ; }
#endif

/* CONSTANTS *******************************************************/

/* Following are the number of sectors we _request_ from the drive
   every time an access outside the already requested range is done.
   The _direct_ size is the number of sectors we're allowed to skip
   directly (performing a read instead of requesting the new sector
   needed */
static const int REQUEST_SIZE = 800;	/* should be less then 255 * 4 */
static const int DIRECT_SIZE = 400;	/* should be less then REQUEST_SIZE */

enum drivemodes { TOC, DATA, RAW, COOKED };
enum datamodes { MODE0, MODE1, MODE2 };
enum resetmodes { SOFT, HARD };

static const int SINGLE = 0x01;		/* single speed drive (FX001S, LU) */
static const int DOUBLE = 0x02;		/* double speed drive (FX001D, ..? */
static const int DOOR = 0x04;		/* door locking capability */
static const int MULTI = 0x08;		/* multi session capability */

static const unsigned char READ1X = 0xc0;
static const unsigned char READ2X = 0xc1;


/* DECLARATIONS ****************************************************/
struct s_subqcode {
	unsigned char control;
	unsigned char tno;
	unsigned char index;
	struct cdrom_msf0 tt;
	struct cdrom_msf0 dt;
};

struct s_diskinfo {
	unsigned int n_first;
	unsigned int n_last;
	struct cdrom_msf0 msf_leadout;
	struct cdrom_msf0 msf_first;
};

struct s_multi {
	unsigned char multi;
	struct cdrom_msf0 msf_last;
};

struct s_version {
	unsigned char code;
	unsigned char ver;
};

/* Per drive/controller stuff **************************************/

struct s_drive_stuff {
	/* waitqueues */
	wait_queue_head_t busyq;
	wait_queue_head_t lockq;
	wait_queue_head_t sleepq;

	/* flags */
	volatile int introk;	/* status of last irq operation */
	volatile int busy;	/* drive performs an operation */
	volatile int lock;	/* exclusive usage */

	/* cd infos */
	struct s_diskinfo di;
	struct s_multi multi;
	struct s_subqcode *toc;	/* first entry of the toc array */
	struct s_subqcode start;
	struct s_subqcode stop;
	int xa;			/* 1 if xa disk */
	int audio;		/* 1 if audio disk */
	int audiostatus;

	/* `buffer' control */
	volatile int valid;	/* pending, ..., values are valid */
	volatile int pending;	/* next sector to be read */
	volatile int low_border;	/* first sector not to be skipped direct */
	volatile int high_border;	/* first sector `out of area' */
#ifdef AK2
	volatile int int_err;
#endif				/* AK2 */

	/* adds and odds */
	unsigned wreg_data;	/* w data */
	unsigned wreg_reset;	/* w hardware reset */
	unsigned wreg_hcon;	/* w hardware conf */
	unsigned wreg_chn;	/* w channel */
	unsigned rreg_data;	/* r data */
	unsigned rreg_status;	/* r status */

	int irq;		/* irq used by this drive */
	int present;		/* drive present and its capabilities */
	unsigned char readcmd;	/* read cmd depends on single/double speed */
	unsigned char playcmd;	/* play should always be single speed */
	unsigned int xxx;	/* set if changed, reset while open */
	unsigned int yyy;	/* set if changed, reset by media_changed */
	int users;		/* keeps track of open/close */
	int lastsector;		/* last block accessible */
	int status;		/* last operation's error / status */
	int readerrs;		/* # of blocks read w/o error */
	struct cdrom_device_info info;
	struct gendisk *disk;
};


/* Prototypes ******************************************************/

/*	The following prototypes are already declared elsewhere.  They are
 	repeated here to show what's going on.  And to sense, if they're
	changed elsewhere. */

static int mcdx_init(void);

static int mcdx_block_open(struct inode *inode, struct file *file)
{
	struct s_drive_stuff *p = inode->i_bdev->bd_disk->private_data;
	return cdrom_open(&p->info, inode, file);
}

static int mcdx_block_release(struct inode *inode, struct file *file)
{
	struct s_drive_stuff *p = inode->i_bdev->bd_disk->private_data;
	return cdrom_release(&p->info, file);
}

static int mcdx_block_ioctl(struct inode *inode, struct file *file,
				unsigned cmd, unsigned long arg)
{
	struct s_drive_stuff *p = inode->i_bdev->bd_disk->private_data;
	return cdrom_ioctl(file, &p->info, inode, cmd, arg);
}

static int mcdx_block_media_changed(struct gendisk *disk)
{
	struct s_drive_stuff *p = disk->private_data;
	return cdrom_media_changed(&p->info);
}

static struct block_device_operations mcdx_bdops =
{
	.owner		= THIS_MODULE,
	.open		= mcdx_block_open,
	.release	= mcdx_block_release,
	.ioctl		= mcdx_block_ioctl,
	.media_changed	= mcdx_block_media_changed,
};


/*	Indirect exported functions. These functions are exported by their
	addresses, such as mcdx_open and mcdx_close in the
	structure mcdx_dops. */

/* exported by file_ops */
static int mcdx_open(struct cdrom_device_info *cdi, int purpose);
static void mcdx_close(struct cdrom_device_info *cdi);
static int mcdx_media_changed(struct cdrom_device_info *cdi, int disc_nr);
static int mcdx_tray_move(struct cdrom_device_info *cdi, int position);
static int mcdx_lockdoor(struct cdrom_device_info *cdi, int lock);
static int mcdx_audio_ioctl(struct cdrom_device_info *cdi,
			    unsigned int cmd, void *arg);

/* misc internal support functions */
static void log2msf(unsigned int, struct cdrom_msf0 *);
static unsigned int msf2log(const struct cdrom_msf0 *);
static unsigned int uint2bcd(unsigned int);
static unsigned int bcd2uint(unsigned char);
static unsigned port(int *);
static int irq(int *);
static void mcdx_delay(struct s_drive_stuff *, long jifs);
static int mcdx_transfer(struct s_drive_stuff *, char *buf, int sector,
			 int nr_sectors);
static int mcdx_xfer(struct s_drive_stuff *, char *buf, int sector,
		     int nr_sectors);

static int mcdx_config(struct s_drive_stuff *, int);
static int mcdx_requestversion(struct s_drive_stuff *, struct s_version *,
			       int);
static int mcdx_stop(struct s_drive_stuff *, int);
static int mcdx_hold(struct s_drive_stuff *, int);
static int mcdx_reset(struct s_drive_stuff *, enum resetmodes, int);
static int mcdx_setdrivemode(struct s_drive_stuff *, enum drivemodes, int);
static int mcdx_setdatamode(struct s_drive_stuff *, enum datamodes, int);
static int mcdx_requestsubqcode(struct s_drive_stuff *,
				struct s_subqcode *, int);
static int mcdx_requestmultidiskinfo(struct s_drive_stuff *,
				     struct s_multi *, int);
static int mcdx_requesttocdata(struct s_drive_stuff *, struct s_diskinfo *,
			       int);
static int mcdx_getstatus(struct s_drive_stuff *, int);
static int mcdx_getval(struct s_drive_stuff *, int to, int delay, char *);
static int mcdx_talk(struct s_drive_stuff *,
		     const unsigned char *cmd, size_t,
		     void *buffer, size_t size, unsigned int timeout, int);
static int mcdx_readtoc(struct s_drive_stuff *);
static int mcdx_playtrk(struct s_drive_stuff *, const struct cdrom_ti *);
static int mcdx_playmsf(struct s_drive_stuff *, const struct cdrom_msf *);
static int mcdx_setattentuator(struct s_drive_stuff *,
			       struct cdrom_volctrl *, int);

/* static variables ************************************************/

static int mcdx_drive_map[][2] = MCDX_DRIVEMAP;
static struct s_drive_stuff *mcdx_stuffp[MCDX_NDRIVES];
static DEFINE_SPINLOCK(mcdx_lock);
static struct request_queue *mcdx_queue;

/* You can only set the first two pairs, from old MODULE_PARM code.  */
static int mcdx_set(const char *val, struct kernel_param *kp)
{
	get_options((char *)val, 4, (int *)mcdx_drive_map);
	return 0;
}
module_param_call(mcdx, mcdx_set, NULL, NULL, 0);

static struct cdrom_device_ops mcdx_dops = {
	.open		= mcdx_open,
	.release	= mcdx_close,
	.media_changed	= mcdx_media_changed,
	.tray_move	= mcdx_tray_move,
	.lock_door	= mcdx_lockdoor,
	.audio_ioctl	= mcdx_audio_ioctl,
	.capability	= CDC_OPEN_TRAY | CDC_LOCK | CDC_MEDIA_CHANGED |
			  CDC_PLAY_AUDIO | CDC_DRIVE_STATUS,
};

/* KERNEL INTERFACE FUNCTIONS **************************************/


static int mcdx_audio_ioctl(struct cdrom_device_info *cdi,
			    unsigned int cmd, void *arg)
{
	struct s_drive_stuff *stuffp = cdi->handle;

	if (!stuffp->present)
		return -ENXIO;

	if (stuffp->xxx) {
		if (-1 == mcdx_requesttocdata(stuffp, &stuffp->di, 1)) {
			stuffp->lastsector = -1;
		} else {
			stuffp->lastsector = (CD_FRAMESIZE / 512)
			    * msf2log(&stuffp->di.msf_leadout) - 1;
		}

		if (stuffp->toc) {
			kfree(stuffp->toc);
			stuffp->toc = NULL;
			if (-1 == mcdx_readtoc(stuffp))
				return -1;
		}

		stuffp->xxx = 0;
	}

	switch (cmd) {
	case CDROMSTART:{
			xtrace(IOCTL, "ioctl() START\n");
			/* Spin up the drive.  Don't think we can do this.
			   * For now, ignore it.
			 */
			return 0;
		}

	case CDROMSTOP:{
			xtrace(IOCTL, "ioctl() STOP\n");
			stuffp->audiostatus = CDROM_AUDIO_INVALID;
			if (-1 == mcdx_stop(stuffp, 1))
				return -EIO;
			return 0;
		}

	case CDROMPLAYTRKIND:{
			struct cdrom_ti *ti = (struct cdrom_ti *) arg;

			xtrace(IOCTL, "ioctl() PLAYTRKIND\n");
			if ((ti->cdti_trk0 < stuffp->di.n_first)
			    || (ti->cdti_trk0 > stuffp->di.n_last)
			    || (ti->cdti_trk1 < stuffp->di.n_first))
				return -EINVAL;
			if (ti->cdti_trk1 > stuffp->di.n_last)
				ti->cdti_trk1 = stuffp->di.n_last;
			xtrace(PLAYTRK, "ioctl() track %d to %d\n",
			       ti->cdti_trk0, ti->cdti_trk1);
			return mcdx_playtrk(stuffp, ti);
		}

	case CDROMPLAYMSF:{
			struct cdrom_msf *msf = (struct cdrom_msf *) arg;

			xtrace(IOCTL, "ioctl() PLAYMSF\n");

			if ((stuffp->audiostatus == CDROM_AUDIO_PLAY)
			    && (-1 == mcdx_hold(stuffp, 1)))
				return -EIO;

			msf->cdmsf_min0 = uint2bcd(msf->cdmsf_min0);
			msf->cdmsf_sec0 = uint2bcd(msf->cdmsf_sec0);
			msf->cdmsf_frame0 = uint2bcd(msf->cdmsf_frame0);

			msf->cdmsf_min1 = uint2bcd(msf->cdmsf_min1);
			msf->cdmsf_sec1 = uint2bcd(msf->cdmsf_sec1);
			msf->cdmsf_frame1 = uint2bcd(msf->cdmsf_frame1);

			stuffp->stop.dt.minute = msf->cdmsf_min1;
			stuffp->stop.dt.second = msf->cdmsf_sec1;
			stuffp->stop.dt.frame = msf->cdmsf_frame1;

			return mcdx_playmsf(stuffp, msf);
		}

	case CDROMRESUME:{
			xtrace(IOCTL, "ioctl() RESUME\n");
			return mcdx_playtrk(stuffp, NULL);
		}

	case CDROMREADTOCENTRY:{
			struct cdrom_tocentry *entry =
			    (struct cdrom_tocentry *) arg;
			struct s_subqcode *tp = NULL;
			xtrace(IOCTL, "ioctl() READTOCENTRY\n");

			if (-1 == mcdx_readtoc(stuffp))
				return -1;
			if (entry->cdte_track == CDROM_LEADOUT)
				tp = &stuffp->toc[stuffp->di.n_last -
						  stuffp->di.n_first + 1];
			else if (entry->cdte_track > stuffp->di.n_last
				 || entry->cdte_track < stuffp->di.n_first)
				return -EINVAL;
			else
				tp = &stuffp->toc[entry->cdte_track -
						  stuffp->di.n_first];

			if (NULL == tp)
				return -EIO;
			entry->cdte_adr = tp->control;
			entry->cdte_ctrl = tp->control >> 4;
			/* Always return stuff in MSF, and let the Uniform cdrom driver
			   worry about what the user actually wants */
			entry->cdte_addr.msf.minute =
			    bcd2uint(tp->dt.minute);
			entry->cdte_addr.msf.second =
			    bcd2uint(tp->dt.second);
			entry->cdte_addr.msf.frame =
			    bcd2uint(tp->dt.frame);
			return 0;
		}

	case CDROMSUBCHNL:{
			struct cdrom_subchnl *sub =
			    (struct cdrom_subchnl *) arg;
			struct s_subqcode q;

			xtrace(IOCTL, "ioctl() SUBCHNL\n");

			if (-1 == mcdx_requestsubqcode(stuffp, &q, 2))
				return -EIO;

			xtrace(SUBCHNL, "audiostatus: %x\n",
			       stuffp->audiostatus);
			sub->cdsc_audiostatus = stuffp->audiostatus;
			sub->cdsc_adr = q.control;
			sub->cdsc_ctrl = q.control >> 4;
			sub->cdsc_trk = bcd2uint(q.tno);
			sub->cdsc_ind = bcd2uint(q.index);

			xtrace(SUBCHNL, "trk %d, ind %d\n",
			       sub->cdsc_trk, sub->cdsc_ind);
			/* Always return stuff in MSF, and let the Uniform cdrom driver
			   worry about what the user actually wants */
			sub->cdsc_absaddr.msf.minute =
			    bcd2uint(q.dt.minute);
			sub->cdsc_absaddr.msf.second =
			    bcd2uint(q.dt.second);
			sub->cdsc_absaddr.msf.frame = bcd2uint(q.dt.frame);
			sub->cdsc_reladdr.msf.minute =
			    bcd2uint(q.tt.minute);
			sub->cdsc_reladdr.msf.second =
			    bcd2uint(q.tt.second);
			sub->cdsc_reladdr.msf.frame = bcd2uint(q.tt.frame);
			xtrace(SUBCHNL,
			       "msf: abs %02d:%02d:%02d, rel %02d:%02d:%02d\n",
			       sub->cdsc_absaddr.msf.minute,
			       sub->cdsc_absaddr.msf.second,
			       sub->cdsc_absaddr.msf.frame,
			       sub->cdsc_reladdr.msf.minute,
			       sub->cdsc_reladdr.msf.second,
			       sub->cdsc_reladdr.msf.frame);

			return 0;
		}

	case CDROMREADTOCHDR:{
			struct cdrom_tochdr *toc =
			    (struct cdrom_tochdr *) arg;

			xtrace(IOCTL, "ioctl() READTOCHDR\n");
			toc->cdth_trk0 = stuffp->di.n_first;
			toc->cdth_trk1 = stuffp->di.n_last;
			xtrace(TOCHDR,
			       "ioctl() track0 = %d, track1 = %d\n",
			       stuffp->di.n_first, stuffp->di.n_last);
			return 0;
		}

	case CDROMPAUSE:{
			xtrace(IOCTL, "ioctl() PAUSE\n");
			if (stuffp->audiostatus != CDROM_AUDIO_PLAY)
				return -EINVAL;
			if (-1 == mcdx_stop(stuffp, 1))
				return -EIO;
			stuffp->audiostatus = CDROM_AUDIO_PAUSED;
			if (-1 ==
			    mcdx_requestsubqcode(stuffp, &stuffp->start,
						 1))
				return -EIO;
			return 0;
		}

	case CDROMMULTISESSION:{
			struct cdrom_multisession *ms =
			    (struct cdrom_multisession *) arg;
			xtrace(IOCTL, "ioctl() MULTISESSION\n");
			/* Always return stuff in LBA, and let the Uniform cdrom driver
			   worry about what the user actually wants */
			ms->addr.lba = msf2log(&stuffp->multi.msf_last);
			ms->xa_flag = !!stuffp->multi.multi;
			xtrace(MS,
			       "ioctl() (%d, 0x%08x [%02x:%02x.%02x])\n",
			       ms->xa_flag, ms->addr.lba,
			       stuffp->multi.msf_last.minute,
			       stuffp->multi.msf_last.second,
			       stuffp->multi.msf_last.frame);

			return 0;
		}

	case CDROMEJECT:{
			xtrace(IOCTL, "ioctl() EJECT\n");
			if (stuffp->users > 1)
				return -EBUSY;
			return (mcdx_tray_move(cdi, 1));
		}

	case CDROMCLOSETRAY:{
			xtrace(IOCTL, "ioctl() CDROMCLOSETRAY\n");
			return (mcdx_tray_move(cdi, 0));
		}

	case CDROMVOLCTRL:{
			struct cdrom_volctrl *volctrl =
			    (struct cdrom_volctrl *) arg;
			xtrace(IOCTL, "ioctl() VOLCTRL\n");

#if 0				/* not tested! */
			/* adjust for the weirdness of workman (md) */
			/* can't test it (hs) */
			volctrl.channel2 = volctrl.channel1;
			volctrl.channel1 = volctrl.channel3 = 0x00;
#endif
			return mcdx_setattentuator(stuffp, volctrl, 2);
		}

	default:
		return -EINVAL;
	}
}

static void do_mcdx_request(request_queue_t * q)
{
	struct s_drive_stuff *stuffp;
	struct request *req;

      again:

	req = elv_next_request(q);
	if (!req)
		return;

	stuffp = req->rq_disk->private_data;

	if (!stuffp->present) {
		xwarn("do_request(): bad device: %s\n",req->rq_disk->disk_name);
		xtrace(REQUEST, "end_request(0): bad device\n");
		end_request(req, 0);
		return;
	}

	if (stuffp->audio) {
		xwarn("do_request() attempt to read from audio cd\n");
		xtrace(REQUEST, "end_request(0): read from audio\n");
		end_request(req, 0);
		return;
	}

	xtrace(REQUEST, "do_request() (%lu + %lu)\n",
	       req->sector, req->nr_sectors);

	if (req->cmd != READ) {
		xwarn("do_request(): non-read command to cd!!\n");
		xtrace(REQUEST, "end_request(0): write\n");
		end_request(req, 0);
		return;
	}
	else {
		stuffp->status = 0;
		while (req->nr_sectors) {
			int i;

			i = mcdx_transfer(stuffp,
					  req->buffer,
					  req->sector,
					  req->nr_sectors);

			if (i == -1) {
				end_request(req, 0);
				goto again;
			}
			req->sector += i;
			req->nr_sectors -= i;
			req->buffer += (i * 512);
		}
		end_request(req, 1);
		goto again;

		xtrace(REQUEST, "end_request(1)\n");
		end_request(req, 1);
	}

	goto again;
}

static int mcdx_open(struct cdrom_device_info *cdi, int purpose)
{
	struct s_drive_stuff *stuffp;
	xtrace(OPENCLOSE, "open()\n");
	stuffp = cdi->handle;
	if (!stuffp->present)
		return -ENXIO;

	/* Make the modules looking used ... (thanx bjorn).
	 * But we shouldn't forget to decrement the module counter
	 * on error return */

	/* this is only done to test if the drive talks with us */
	if (-1 == mcdx_getstatus(stuffp, 1))
		return -EIO;

	if (stuffp->xxx) {

		xtrace(OPENCLOSE, "open() media changed\n");
		stuffp->audiostatus = CDROM_AUDIO_INVALID;
		stuffp->readcmd = 0;
		xtrace(OPENCLOSE, "open() Request multisession info\n");
		if (-1 ==
		    mcdx_requestmultidiskinfo(stuffp, &stuffp->multi, 6))
			xinfo("No multidiskinfo\n");
	} else {
		/* multisession ? */
		if (!stuffp->multi.multi)
			stuffp->multi.msf_last.second = 2;

		xtrace(OPENCLOSE, "open() MS: %d, last @ %02x:%02x.%02x\n",
		       stuffp->multi.multi,
		       stuffp->multi.msf_last.minute,
		       stuffp->multi.msf_last.second,
		       stuffp->multi.msf_last.frame);

		{;
		}		/* got multisession information */
		/* request the disks table of contents (aka diskinfo) */
		if (-1 == mcdx_requesttocdata(stuffp, &stuffp->di, 1)) {

			stuffp->lastsector = -1;

		} else {

			stuffp->lastsector = (CD_FRAMESIZE / 512)
			    * msf2log(&stuffp->di.msf_leadout) - 1;

			xtrace(OPENCLOSE,
			       "open() start %d (%02x:%02x.%02x) %d\n",
			       stuffp->di.n_first,
			       stuffp->di.msf_first.minute,
			       stuffp->di.msf_first.second,
			       stuffp->di.msf_first.frame,
			       msf2log(&stuffp->di.msf_first));
			xtrace(OPENCLOSE,
			       "open() last %d (%02x:%02x.%02x) %d\n",
			       stuffp->di.n_last,
			       stuffp->di.msf_leadout.minute,
			       stuffp->di.msf_leadout.second,
			       stuffp->di.msf_leadout.frame,
			       msf2log(&stuffp->di.msf_leadout));
		}

		if (stuffp->toc) {
			xtrace(MALLOC, "open() free old toc @ %p\n",
			       stuffp->toc);
			kfree(stuffp->toc);

			stuffp->toc = NULL;
		}

		xtrace(OPENCLOSE, "open() init irq generation\n");
		if (-1 == mcdx_config(stuffp, 1))
			return -EIO;
#if FALLBACK
		/* Set the read speed */
		xwarn("AAA %x AAA\n", stuffp->readcmd);
		if (stuffp->readerrs)
			stuffp->readcmd = READ1X;
		else
			stuffp->readcmd =
			    stuffp->present | SINGLE ? READ1X : READ2X;
		xwarn("XXX %x XXX\n", stuffp->readcmd);
#else
		stuffp->readcmd =
		    stuffp->present | SINGLE ? READ1X : READ2X;
#endif

		/* try to get the first sector, iff any ... */
		if (stuffp->lastsector >= 0) {
			char buf[512];
			int ans;
			int tries;

			stuffp->xa = 0;
			stuffp->audio = 0;

			for (tries = 6; tries; tries--) {

				stuffp->introk = 1;

				xtrace(OPENCLOSE, "open() try as %s\n",
				       stuffp->xa ? "XA" : "normal");
				/* set data mode */
				if (-1 == (ans = mcdx_setdatamode(stuffp,
								  stuffp->
								  xa ?
								  MODE2 :
								  MODE1,
								  1))) {
					/* return -EIO; */
					stuffp->xa = 0;
					break;
				}

				if ((stuffp->audio = e_audio(ans)))
					break;

				while (0 ==
				       (ans =
					mcdx_transfer(stuffp, buf, 0, 1)));

				if (ans == 1)
					break;
				stuffp->xa = !stuffp->xa;
			}
		}
		/* xa disks will be read in raw mode, others not */
		if (-1 == mcdx_setdrivemode(stuffp,
					    stuffp->xa ? RAW : COOKED,
					    1))
			return -EIO;
		if (stuffp->audio) {
			xinfo("open() audio disk found\n");
		} else if (stuffp->lastsector >= 0) {
			xinfo("open() %s%s disk found\n",
			      stuffp->xa ? "XA / " : "",
			      stuffp->multi.
			      multi ? "Multi Session" : "Single Session");
		}
	}
	stuffp->xxx = 0;
	stuffp->users++;
	return 0;
}

static void mcdx_close(struct cdrom_device_info *cdi)
{
	struct s_drive_stuff *stuffp;

	xtrace(OPENCLOSE, "close()\n");

	stuffp = cdi->handle;

	--stuffp->users;
}

static int mcdx_media_changed(struct cdrom_device_info *cdi, int disc_nr)
/*	Return: 1 if media changed since last call to this function
			0 otherwise */
{
	struct s_drive_stuff *stuffp;

	xinfo("mcdx_media_changed called for device %s\n", cdi->name);

	stuffp = cdi->handle;
	mcdx_getstatus(stuffp, 1);

	if (stuffp->yyy == 0)
		return 0;

	stuffp->yyy = 0;
	return 1;
}

#ifndef MODULE
static int __init mcdx_setup(char *str)
{
	int pi[4];
	(void) get_options(str, ARRAY_SIZE(pi), pi);

	if (pi[0] > 0)
		mcdx_drive_map[0][0] = pi[1];
	if (pi[0] > 1)
		mcdx_drive_map[0][1] = pi[2];
	return 1;
}

__setup("mcdx=", mcdx_setup);

#endif

/* DIRTY PART ******************************************************/

static void mcdx_delay(struct s_drive_stuff *stuff, long jifs)
/* This routine is used for sleeping.
 * A jifs value <0 means NO sleeping,
 *              =0 means minimal sleeping (let the kernel
 *                 run for other processes)
 *              >0 means at least sleep for that amount.
 *	May be we could use a simple count loop w/ jumps to itself, but
 *	I wanna make this independent of cpu speed. [1 jiffy is 1/HZ] sec */
{
	if (jifs < 0)
		return;

	xtrace(SLEEP, "*** delay: sleepq\n");
	interruptible_sleep_on_timeout(&stuff->sleepq, jifs);
	xtrace(SLEEP, "delay awoken\n");
	if (signal_pending(current)) {
		xtrace(SLEEP, "got signal\n");
	}
}

static irqreturn_t mcdx_intr(int irq, void *dev_id, struct pt_regs *regs)
{
	struct s_drive_stuff *stuffp = dev_id;
	unsigned char b;

	if (stuffp == NULL) {
		xwarn("mcdx: no device for intr %d\n", irq);
		return IRQ_NONE;
	}
#ifdef AK2
	if (!stuffp->busy && stuffp->pending)
		stuffp->int_err = 1;

#endif				/* AK2 */
	/* get the interrupt status */
	b = inb(stuffp->rreg_status);
	stuffp->introk = ~b & MCDX_RBIT_DTEN;

	/* NOTE: We only should get interrupts if the data we
	 * requested are ready to transfer.
	 * But the drive seems to generate ``asynchronous'' interrupts
	 * on several error conditions too.  (Despite the err int enable
	 * setting during initialisation) */

	/* if not ok, read the next byte as the drives status */
	if (!stuffp->introk) {
		xtrace(IRQ, "intr() irq %d hw status 0x%02x\n", irq, b);
		if (~b & MCDX_RBIT_STEN) {
			xinfo("intr() irq %d    status 0x%02x\n",
			      irq, inb(stuffp->rreg_data));
		} else {
			xinfo("intr() irq %d ambiguous hw status\n", irq);
		}
	} else {
		xtrace(IRQ, "irq() irq %d ok, status %02x\n", irq, b);
	}

	stuffp->busy = 0;
	wake_up_interruptible(&stuffp->busyq);
	return IRQ_HANDLED;
}


static int mcdx_talk(struct s_drive_stuff *stuffp,
	  const unsigned char *cmd, size_t cmdlen,
	  void *buffer, size_t size, unsigned int timeout, int tries)
/* Send a command to the drive, wait for the result.
 * returns -1 on timeout, drive status otherwise
 * If buffer is not zero, the result (length size) is stored there.
 * If buffer is zero the size should be the number of bytes to read
 * from the drive.  These bytes are discarded.
 */
{
	int st;
	char c;
	int discard;

	/* Somebody wants the data read? */
	if ((discard = (buffer == NULL)))
		buffer = &c;

	while (stuffp->lock) {
		xtrace(SLEEP, "*** talk: lockq\n");
		interruptible_sleep_on(&stuffp->lockq);
		xtrace(SLEEP, "talk: awoken\n");
	}

	stuffp->lock = 1;

	/* An operation other then reading data destroys the
	   * data already requested and remembered in stuffp->request, ... */
	stuffp->valid = 0;

#if MCDX_DEBUG & TALK
	{
		unsigned char i;
		xtrace(TALK,
		       "talk() %d / %d tries, res.size %d, command 0x%02x",
		       tries, timeout, size, (unsigned char) cmd[0]);
		for (i = 1; i < cmdlen; i++)
			xtrace(TALK, " 0x%02x", cmd[i]);
		xtrace(TALK, "\n");
	}
#endif

	/*  give up if all tries are done (bad) or if the status
	 *  st != -1 (good) */
	for (st = -1; st == -1 && tries; tries--) {

		char *bp = (char *) buffer;
		size_t sz = size;

		outsb(stuffp->wreg_data, cmd, cmdlen);
		xtrace(TALK, "talk() command sent\n");

		/* get the status byte */
		if (-1 == mcdx_getval(stuffp, timeout, 0, bp)) {
			xinfo("talk() %02x timed out (status), %d tr%s left\n",
			     cmd[0], tries - 1, tries == 2 ? "y" : "ies");
			continue;
		}
		st = *bp;
		sz--;
		if (!discard)
			bp++;

		xtrace(TALK, "talk() got status 0x%02x\n", st);

		/* command error? */
		if (e_cmderr(st)) {
			xwarn("command error cmd = %02x %s \n",
			      cmd[0], cmdlen > 1 ? "..." : "");
			st = -1;
			continue;
		}

		/* audio status? */
		if (stuffp->audiostatus == CDROM_AUDIO_INVALID)
			stuffp->audiostatus =
			    e_audiobusy(st) ? CDROM_AUDIO_PLAY :
			    CDROM_AUDIO_NO_STATUS;
		else if (stuffp->audiostatus == CDROM_AUDIO_PLAY
			 && e_audiobusy(st) == 0)
			stuffp->audiostatus = CDROM_AUDIO_COMPLETED;

		/* media change? */
		if (e_changed(st)) {
			xinfo("talk() media changed\n");
			stuffp->xxx = stuffp->yyy = 1;
		}

		/* now actually get the data */
		while (sz--) {
			if (-1 == mcdx_getval(stuffp, timeout, 0, bp)) {
				xinfo("talk() %02x timed out (data), %d tr%s left\n",
				     cmd[0], tries - 1,
				     tries == 2 ? "y" : "ies");
				st = -1;
				break;
			}
			if (!discard)
				bp++;
			xtrace(TALK, "talk() got 0x%02x\n", *(bp - 1));
		}
	}

#if !MCDX_QUIET
	if (!tries && st == -1)
		xinfo("talk() giving up\n");
#endif

	stuffp->lock = 0;
	wake_up_interruptible(&stuffp->lockq);

	xtrace(TALK, "talk() done with 0x%02x\n", st);
	return st;
}

/* MODULE STUFF ***********************************************************/

int __mcdx_init(void)
{
	int i;
	int drives = 0;

	mcdx_init();
	for (i = 0; i < MCDX_NDRIVES; i++) {
		if (mcdx_stuffp[i]) {
			xtrace(INIT, "init_module() drive %d stuff @ %p\n",
			       i, mcdx_stuffp[i]);
			drives++;
		}
	}

	if (!drives)
		return -EIO;

	return 0;
}

static void __exit mcdx_exit(void)
{
	int i;

	xinfo("cleanup_module called\n");

	for (i = 0; i < MCDX_NDRIVES; i++) {
		struct s_drive_stuff *stuffp = mcdx_stuffp[i];
		if (!stuffp)
			continue;
		del_gendisk(stuffp->disk);
		if (unregister_cdrom(&stuffp->info)) {
			printk(KERN_WARNING "Can't unregister cdrom mcdx\n");
			continue;
		}
		put_disk(stuffp->disk);
		release_region(stuffp->wreg_data, MCDX_IO_SIZE);
		free_irq(stuffp->irq, NULL);
		if (stuffp->toc) {
			xtrace(MALLOC, "cleanup_module() free toc @ %p\n",
			       stuffp->toc);
			kfree(stuffp->toc);
		}
		xtrace(MALLOC, "cleanup_module() free stuffp @ %p\n",
		       stuffp);
		mcdx_stuffp[i] = NULL;
		kfree(stuffp);
	}

	if (unregister_blkdev(MAJOR_NR, "mcdx") != 0) {
		xwarn("cleanup() unregister_blkdev() failed\n");
	}
	blk_cleanup_queue(mcdx_queue);
#if !MCDX_QUIET
	else
	xinfo("cleanup() succeeded\n");
#endif
}

#ifdef MODULE
module_init(__mcdx_init);
#endif
module_exit(mcdx_exit);


/* Support functions ************************************************/

static int __init mcdx_init_drive(int drive)
{
	struct s_version version;
	struct gendisk *disk;
	struct s_drive_stuff *stuffp;
	int size = sizeof(*stuffp);
	char msg[80];

	xtrace(INIT, "init() try drive %d\n", drive);

	xtrace(INIT, "kmalloc space for stuffpt's\n");
	xtrace(MALLOC, "init() malloc %d bytes\n", size);
	if (!(stuffp = kmalloc(size, GFP_KERNEL))) {
		xwarn("init() malloc failed\n");
		return 1;
	}

	disk = alloc_disk(1);
	if (!disk) {
		xwarn("init() malloc failed\n");
		kfree(stuffp);
		return 1;
	}

	xtrace(INIT, "init() got %d bytes for drive stuff @ %p\n",
	       sizeof(*stuffp), stuffp);

	/* set default values */
	memset(stuffp, 0, sizeof(*stuffp));

	stuffp->present = 0;	/* this should be 0 already */
	stuffp->toc = NULL;	/* this should be NULL already */

	/* setup our irq and i/o addresses */
	stuffp->irq = irq(mcdx_drive_map[drive]);
	stuffp->wreg_data = stuffp->rreg_data = port(mcdx_drive_map[drive]);
	stuffp->wreg_reset = stuffp->rreg_status = stuffp->wreg_data + 1;
	stuffp->wreg_hcon = stuffp->wreg_reset + 1;
	stuffp->wreg_chn = stuffp->wreg_hcon + 1;

	init_waitqueue_head(&stuffp->busyq);
	init_waitqueue_head(&stuffp->lockq);
	init_waitqueue_head(&stuffp->sleepq);

	/* check if i/o addresses are available */
	if (!request_region(stuffp->wreg_data, MCDX_IO_SIZE, "mcdx")) {
		xwarn("0x%03x,%d: Init failed. "
		      "I/O ports (0x%03x..0x%03x) already in use.\n",
		      stuffp->wreg_data, stuffp->irq,
		      stuffp->wreg_data,
		      stuffp->wreg_data + MCDX_IO_SIZE - 1);
		xtrace(MALLOC, "init() free stuffp @ %p\n", stuffp);
		kfree(stuffp);
		put_disk(disk);
		xtrace(INIT, "init() continue at next drive\n");
		return 0;	/* next drive */
	}

	xtrace(INIT, "init() i/o port is available at 0x%03x\n"
	       stuffp->wreg_data);
	xtrace(INIT, "init() hardware reset\n");
	mcdx_reset(stuffp, HARD, 1);

	xtrace(INIT, "init() get version\n");
	if (-1 == mcdx_requestversion(stuffp, &version, 4)) {
		/* failed, next drive */
		release_region(stuffp->wreg_data, MCDX_IO_SIZE);
		xwarn("%s=0x%03x,%d: Init failed. Can't get version.\n",
		      MCDX, stuffp->wreg_data, stuffp->irq);
		xtrace(MALLOC, "init() free stuffp @ %p\n", stuffp);
		kfree(stuffp);
		put_disk(disk);
		xtrace(INIT, "init() continue at next drive\n");
		return 0;
	}

	switch (version.code) {
	case 'D':
		stuffp->readcmd = READ2X;
		stuffp->present = DOUBLE | DOOR | MULTI;
		break;
	case 'F':
		stuffp->readcmd = READ1X;
		stuffp->present = SINGLE | DOOR | MULTI;
		break;
	case 'M':
		stuffp->readcmd = READ1X;
		stuffp->present = SINGLE;
		break;
	default:
		stuffp->present = 0;
		break;
	}

	stuffp->playcmd = READ1X;

	if (!stuffp->present) {
		release_region(stuffp->wreg_data, MCDX_IO_SIZE);
		xwarn("%s=0x%03x,%d: Init failed. No Mitsumi CD-ROM?.\n",
		      MCDX, stuffp->wreg_data, stuffp->irq);
		kfree(stuffp);
		put_disk(disk);
		return 0;	/* next drive */
	}

	xtrace(INIT, "init() register blkdev\n");
	if (register_blkdev(MAJOR_NR, "mcdx")) {
		release_region(stuffp->wreg_data, MCDX_IO_SIZE);
		kfree(stuffp);
		put_disk(disk);
		return 1;
	}

	mcdx_queue = blk_init_queue(do_mcdx_request, &mcdx_lock);
	if (!mcdx_queue) {
		unregister_blkdev(MAJOR_NR, "mcdx");
		release_region(stuffp->wreg_data, MCDX_IO_SIZE);
		kfree(stuffp);
		put_disk(disk);
		return 1;
	}

	xtrace(INIT, "init() subscribe irq and i/o\n");
	if (request_irq(stuffp->irq, mcdx_intr, SA_INTERRUPT, "mcdx", stuffp)) {
		release_region(stuffp->wreg_data, MCDX_IO_SIZE);
		xwarn("%s=0x%03x,%d: Init failed. Can't get irq (%d).\n",
		      MCDX, stuffp->wreg_data, stuffp->irq, stuffp->irq);
		stuffp->irq = 0;
		blk_cleanup_queue(mcdx_queue);
		kfree(stuffp);
		put_disk(disk);
		return 0;
	}

	xtrace(INIT, "init() get garbage\n");
	{
		int i;
		mcdx_delay(stuffp, HZ / 2);
		for (i = 100; i; i--)
			(void) inb(stuffp->rreg_status);
	}


#if WE_KNOW_WHY
	/* irq 11 -> channel register */
	outb(0x50, stuffp->wreg_chn);
#endif

	xtrace(INIT, "init() set non dma but irq mode\n");
	mcdx_config(stuffp, 1);

	stuffp->info.ops = &mcdx_dops;
	stuffp->info.speed = 2;
	stuffp->info.capacity = 1;
	stuffp->info.handle = stuffp;
	sprintf(stuffp->info.name, "mcdx%d", drive);
	disk->major = MAJOR_NR;
	disk->first_minor = drive;
	strcpy(disk->disk_name, stuffp->info.name);
	disk->fops = &mcdx_bdops;
	disk->flags = GENHD_FL_CD;
	stuffp->disk = disk;

	sprintf(msg, " mcdx: Mitsumi CD-ROM installed at 0x%03x, irq %d."
		" (Firmware version %c %x)\n",
		stuffp->wreg_data, stuffp->irq, version.code, version.ver);
	mcdx_stuffp[drive] = stuffp;
	xtrace(INIT, "init() mcdx_stuffp[%d] = %p\n", drive, stuffp);
	if (register_cdrom(&stuffp->info) != 0) {
		printk("Cannot register Mitsumi CD-ROM!\n");
		free_irq(stuffp->irq, NULL);
		release_region(stuffp->wreg_data, MCDX_IO_SIZE);
		kfree(stuffp);
		put_disk(disk);
		if (unregister_blkdev(MAJOR_NR, "mcdx") != 0)
			xwarn("cleanup() unregister_blkdev() failed\n");
		blk_cleanup_queue(mcdx_queue);
		return 2;
	}
	disk->private_data = stuffp;
	disk->queue = mcdx_queue;
	add_disk(disk);
	printk(msg);
	return 0;
}

static int __init mcdx_init(void)
{
	int drive;
	xwarn("Version 2.14(hs) \n");

	xwarn("$Id: mcdx.c,v 1.21 1997/01/26 07:12:59 davem Exp $\n");

	/* zero the pointer array */
	for (drive = 0; drive < MCDX_NDRIVES; drive++)
		mcdx_stuffp[drive] = NULL;

	/* do the initialisation */
	for (drive = 0; drive < MCDX_NDRIVES; drive++) {
		switch (mcdx_init_drive(drive)) {
		case 2:
			return -EIO;
		case 1:
			break;
		}
	}
	return 0;
}

static int mcdx_transfer(struct s_drive_stuff *stuffp,
	      char *p, int sector, int nr_sectors)
/*	This seems to do the actually transfer.  But it does more.  It
	keeps track of errors occurred and will (if possible) fall back
	to single speed on error.
	Return:	-1 on timeout or other error
			else status byte (as in stuff->st) */
{
	int ans;

	ans = mcdx_xfer(stuffp, p, sector, nr_sectors);
	return ans;
#if FALLBACK
	if (-1 == ans)
		stuffp->readerrs++;
	else
		return ans;

	if (stuffp->readerrs && stuffp->readcmd == READ1X) {
		xwarn("XXX Already reading 1x -- no chance\n");
		return -1;
	}

	xwarn("XXX Fallback to 1x\n");

	stuffp->readcmd = READ1X;
	return mcdx_transfer(stuffp, p, sector, nr_sectors);
#endif

}


static int mcdx_xfer(struct s_drive_stuff *stuffp,
		     char *p, int sector, int nr_sectors)
/*	This does actually the transfer from the drive.
	Return:	-1 on timeout or other error
			else status byte (as in stuff->st) */
{
	int border;
	int done = 0;
	long timeout;

	if (stuffp->audio) {
		xwarn("Attempt to read from audio CD.\n");
		return -1;
	}

	if (!stuffp->readcmd) {
		xinfo("Can't transfer from missing disk.\n");
		return -1;
	}

	while (stuffp->lock) {
		interruptible_sleep_on(&stuffp->lockq);
	}

	if (stuffp->valid && (sector >= stuffp->pending)
	    && (sector < stuffp->low_border)) {

		/* All (or at least a part of the sectors requested) seems
		   * to be already requested, so we don't need to bother the
		   * drive with new requests ...
		   * Wait for the drive become idle, but first
		   * check for possible occurred errors --- the drive
		   * seems to report them asynchronously */


		border = stuffp->high_border < (border =
						sector + nr_sectors)
		    ? stuffp->high_border : border;

		stuffp->lock = current->pid;

		do {

			while (stuffp->busy) {

				timeout =
				    interruptible_sleep_on_timeout
				    (&stuffp->busyq, 5 * HZ);

				if (!stuffp->introk) {
					xtrace(XFER,
					       "error via interrupt\n");
				} else if (!timeout) {
					xtrace(XFER, "timeout\n");
				} else if (signal_pending(current)) {
					xtrace(XFER, "signal\n");
				} else
					continue;

				stuffp->lock = 0;
				stuffp->busy = 0;
				stuffp->valid = 0;

				wake_up_interruptible(&stuffp->lockq);
				xtrace(XFER, "transfer() done (-1)\n");
				return -1;
			}

			/* check if we need to set the busy flag (as we
			 * expect an interrupt */
			stuffp->busy = (3 == (stuffp->pending & 3));

			/* Test if it's the first sector of a block,
			 * there we have to skip some bytes as we read raw data */
			if (stuffp->xa && (0 == (stuffp->pending & 3))) {
				const int HEAD =
				    CD_FRAMESIZE_RAW - CD_XA_TAIL -
				    CD_FRAMESIZE;
				insb(stuffp->rreg_data, p, HEAD);
			}

			/* now actually read the data */
			insb(stuffp->rreg_data, p, 512);

			/* test if it's the last sector of a block,
			 * if so, we have to handle XA special */
			if ((3 == (stuffp->pending & 3)) && stuffp->xa) {
				char dummy[CD_XA_TAIL];
				insb(stuffp->rreg_data, &dummy[0], CD_XA_TAIL);
			}

			if (stuffp->pending == sector) {
				p += 512;
				done++;
				sector++;
			}
		} while (++(stuffp->pending) < border);

		stuffp->lock = 0;
		wake_up_interruptible(&stuffp->lockq);

	} else {

		/* The requested sector(s) is/are out of the
		 * already requested range, so we have to bother the drive
		 * with a new request. */

		static unsigned char cmd[] = {
			0,
			0, 0, 0,
			0, 0, 0
		};

		cmd[0] = stuffp->readcmd;

		/* The numbers held in ->pending, ..., should be valid */
		stuffp->valid = 1;
		stuffp->pending = sector & ~3;

		/* do some sanity checks */
		if (stuffp->pending > stuffp->lastsector) {
			xwarn
			    ("transfer() sector %d from nirvana requested.\n",
			     stuffp->pending);
			stuffp->status = MCDX_ST_EOM;
			stuffp->valid = 0;
			xtrace(XFER, "transfer() done (-1)\n");
			return -1;
		}

		if ((stuffp->low_border = stuffp->pending + DIRECT_SIZE)
		    > stuffp->lastsector + 1) {
			xtrace(XFER, "cut low_border\n");
			stuffp->low_border = stuffp->lastsector + 1;
		}
		if ((stuffp->high_border = stuffp->pending + REQUEST_SIZE)
		    > stuffp->lastsector + 1) {
			xtrace(XFER, "cut high_border\n");
			stuffp->high_border = stuffp->lastsector + 1;
		}

		{		/* Convert the sector to be requested to MSF format */
			struct cdrom_msf0 pending;
			log2msf(stuffp->pending / 4, &pending);
			cmd[1] = pending.minute;
			cmd[2] = pending.second;
			cmd[3] = pending.frame;
		}

		cmd[6] =
		    (unsigned
		     char) ((stuffp->high_border - stuffp->pending) / 4);
		xtrace(XFER, "[%2d]\n", cmd[6]);

		stuffp->busy = 1;
		/* Now really issue the request command */
		outsb(stuffp->wreg_data, cmd, sizeof cmd);

	}
#ifdef AK2
	if (stuffp->int_err) {
		stuffp->valid = 0;
		stuffp->int_err = 0;
		return -1;
	}
#endif				/* AK2 */

	stuffp->low_border = (stuffp->low_border +=
			      done) <
	    stuffp->high_border ? stuffp->low_border : stuffp->high_border;

	return done;
}


/*	Access to elements of the mcdx_drive_map members */

static unsigned port(int *ip)
{
	return ip[0];
}
static int irq(int *ip)
{
	return ip[1];
}

/*	Misc number converters */

static unsigned int bcd2uint(unsigned char c)
{
	return (c >> 4) * 10 + (c & 0x0f);
}

static unsigned int uint2bcd(unsigned int ival)
{
	return ((ival / 10) << 4) | (ival % 10);
}

static void log2msf(unsigned int l, struct cdrom_msf0 *pmsf)
{
	l += CD_MSF_OFFSET;
	pmsf->minute = uint2bcd(l / 4500), l %= 4500;
	pmsf->second = uint2bcd(l / 75);
	pmsf->frame = uint2bcd(l % 75);
}

static unsigned int msf2log(const struct cdrom_msf0 *pmsf)
{
	return bcd2uint(pmsf->frame)
	    + bcd2uint(pmsf->second) * 75
	    + bcd2uint(pmsf->minute) * 4500 - CD_MSF_OFFSET;
}

int mcdx_readtoc(struct s_drive_stuff *stuffp)
/*  Read the toc entries from the CD,
 *  Return: -1 on failure, else 0 */
{

	if (stuffp->toc) {
		xtrace(READTOC, "ioctl() toc already read\n");
		return 0;
	}

	xtrace(READTOC, "ioctl() readtoc for %d tracks\n",
	       stuffp->di.n_last - stuffp->di.n_first + 1);

	if (-1 == mcdx_hold(stuffp, 1))
		return -1;

	xtrace(READTOC, "ioctl() tocmode\n");
	if (-1 == mcdx_setdrivemode(stuffp, TOC, 1))
		return -EIO;

	/* all seems to be ok so far ... malloc */
	{
		int size;
		size =
		    sizeof(struct s_subqcode) * (stuffp->di.n_last -
						 stuffp->di.n_first + 2);

		xtrace(MALLOC, "ioctl() malloc %d bytes\n", size);
		stuffp->toc = kmalloc(size, GFP_KERNEL);
		if (!stuffp->toc) {
			xwarn("Cannot malloc %d bytes for toc\n", size);
			mcdx_setdrivemode(stuffp, DATA, 1);
			return -EIO;
		}
	}

	/* now read actually the index */
	{
		int trk;
		int retries;

		for (trk = 0;
		     trk < (stuffp->di.n_last - stuffp->di.n_first + 1);
		     trk++)
			stuffp->toc[trk].index = 0;

		for (retries = 300; retries; retries--) {	/* why 300? */
			struct s_subqcode q;
			unsigned int idx;

			if (-1 == mcdx_requestsubqcode(stuffp, &q, 1)) {
				mcdx_setdrivemode(stuffp, DATA, 1);
				return -EIO;
			}

			idx = bcd2uint(q.index);

			if ((idx > 0)
			    && (idx <= stuffp->di.n_last)
			    && (q.tno == 0)
			    && (stuffp->toc[idx - stuffp->di.n_first].
				index == 0)) {
				stuffp->toc[idx - stuffp->di.n_first] = q;
				xtrace(READTOC,
				       "ioctl() toc idx %d (trk %d)\n",
				       idx, trk);
				trk--;
			}
			if (trk == 0)
				break;
		}
		memset(&stuffp->
		       toc[stuffp->di.n_last - stuffp->di.n_first + 1], 0,
		       sizeof(stuffp->toc[0]));
		stuffp->toc[stuffp->di.n_last - stuffp->di.n_first +
			    1].dt = stuffp->di.msf_leadout;
	}

	/* unset toc mode */
	xtrace(READTOC, "ioctl() undo toc mode\n");
	if (-1 == mcdx_setdrivemode(stuffp, DATA, 2))
		return -EIO;

#if MCDX_DEBUG && READTOC
	{
		int trk;
		for (trk = 0;
		     trk < (stuffp->di.n_last - stuffp->di.n_first + 2);
		     trk++)
			xtrace(READTOC, "ioctl() %d readtoc %02x %02x %02x"
			       "  %02x:%02x.%02x  %02x:%02x.%02x\n",
			       trk + stuffp->di.n_first,
			       stuffp->toc[trk].control,
			       stuffp->toc[trk].tno,
			       stuffp->toc[trk].index,
			       stuffp->toc[trk].tt.minute,
			       stuffp->toc[trk].tt.second,
			       stuffp->toc[trk].tt.frame,
			       stuffp->toc[trk].dt.minute,
			       stuffp->toc[trk].dt.second,
			       stuffp->toc[trk].dt.frame);
	}
#endif

	return 0;
}

static int
mcdx_playmsf(struct s_drive_stuff *stuffp, const struct cdrom_msf *msf)
{
	unsigned char cmd[7] = {
		0, 0, 0, 0, 0, 0, 0
	};

	if (!stuffp->readcmd) {
		xinfo("Can't play from missing disk.\n");
		return -1;
	}

	cmd[0] = stuffp->playcmd;

	cmd[1] = msf->cdmsf_min0;
	cmd[2] = msf->cdmsf_sec0;
	cmd[3] = msf->cdmsf_frame0;
	cmd[4] = msf->cdmsf_min1;
	cmd[5] = msf->cdmsf_sec1;
	cmd[6] = msf->cdmsf_frame1;

	xtrace(PLAYMSF, "ioctl(): play %x "
	       "%02x:%02x:%02x -- %02x:%02x:%02x\n",
	       cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], cmd[5], cmd[6]);

	outsb(stuffp->wreg_data, cmd, sizeof cmd);

	if (-1 == mcdx_getval(stuffp, 3 * HZ, 0, NULL)) {
		xwarn("playmsf() timeout\n");
		return -1;
	}

	stuffp->audiostatus = CDROM_AUDIO_PLAY;
	return 0;
}

static int
mcdx_playtrk(struct s_drive_stuff *stuffp, const struct cdrom_ti *ti)
{
	struct s_subqcode *p;
	struct cdrom_msf msf;

	if (-1 == mcdx_readtoc(stuffp))
		return -1;

	if (ti)
		p = &stuffp->toc[ti->cdti_trk0 - stuffp->di.n_first];
	else
		p = &stuffp->start;

	msf.cdmsf_min0 = p->dt.minute;
	msf.cdmsf_sec0 = p->dt.second;
	msf.cdmsf_frame0 = p->dt.frame;

	if (ti) {
		p = &stuffp->toc[ti->cdti_trk1 - stuffp->di.n_first + 1];
		stuffp->stop = *p;
	} else
		p = &stuffp->stop;

	msf.cdmsf_min1 = p->dt.minute;
	msf.cdmsf_sec1 = p->dt.second;
	msf.cdmsf_frame1 = p->dt.frame;

	return mcdx_playmsf(stuffp, &msf);
}


/* Drive functions ************************************************/

static int mcdx_tray_move(struct cdrom_device_info *cdi, int position)
{
	struct s_drive_stuff *stuffp = cdi->handle;

	if (!stuffp->present)
		return -ENXIO;
	if (!(stuffp->present & DOOR))
		return -ENOSYS;

	if (position)		/* 1: eject */
		return mcdx_talk(stuffp, "\xf6", 1, NULL, 1, 5 * HZ, 3);
	else			/* 0: close */
		return mcdx_talk(stuffp, "\xf8", 1, NULL, 1, 5 * HZ, 3);
	return 1;
}

static int mcdx_stop(struct s_drive_stuff *stuffp, int tries)
{
	return mcdx_talk(stuffp, "\xf0", 1, NULL, 1, 2 * HZ, tries);
}

static int mcdx_hold(struct s_drive_stuff *stuffp, int tries)
{
	return mcdx_talk(stuffp, "\x70", 1, NULL, 1, 2 * HZ, tries);
}

static int mcdx_requestsubqcode(struct s_drive_stuff *stuffp,
		     struct s_subqcode *sub, int tries)
{
	char buf[11];
	int ans;

	if (-1 == (ans = mcdx_talk(stuffp, "\x20", 1, buf, sizeof(buf),
				   2 * HZ, tries)))
		return -1;
	sub->control = buf[1];
	sub->tno = buf[2];
	sub->index = buf[3];
	sub->tt.minute = buf[4];
	sub->tt.second = buf[5];
	sub->tt.frame = buf[6];
	sub->dt.minute = buf[8];
	sub->dt.second = buf[9];
	sub->dt.frame = buf[10];

	return ans;
}

static int mcdx_requestmultidiskinfo(struct s_drive_stuff *stuffp,
			  struct s_multi *multi, int tries)
{
	char buf[5];
	int ans;

	if (stuffp->present & MULTI) {
		ans =
		    mcdx_talk(stuffp, "\x11", 1, buf, sizeof(buf), 2 * HZ,
			      tries);
		multi->multi = buf[1];
		multi->msf_last.minute = buf[2];
		multi->msf_last.second = buf[3];
		multi->msf_last.frame = buf[4];
		return ans;
	} else {
		multi->multi = 0;
		return 0;
	}
}

static int mcdx_requesttocdata(struct s_drive_stuff *stuffp, struct s_diskinfo *info,
		    int tries)
{
	char buf[9];
	int ans;
	ans =
	    mcdx_talk(stuffp, "\x10", 1, buf, sizeof(buf), 2 * HZ, tries);
	if (ans == -1) {
		info->n_first = 0;
		info->n_last = 0;
	} else {
		info->n_first = bcd2uint(buf[1]);
		info->n_last = bcd2uint(buf[2]);
		info->msf_leadout.minute = buf[3];
		info->msf_leadout.second = buf[4];
		info->msf_leadout.frame = buf[5];
		info->msf_first.minute = buf[6];
		info->msf_first.second = buf[7];
		info->msf_first.frame = buf[8];
	}
	return ans;
}

static int mcdx_setdrivemode(struct s_drive_stuff *stuffp, enum drivemodes mode,
		  int tries)
{
	char cmd[2];
	int ans;

	xtrace(HW, "setdrivemode() %d\n", mode);

	if (-1 == (ans = mcdx_talk(stuffp, "\xc2", 1, cmd, sizeof(cmd), 5 * HZ, tries)))
		return -1;

	switch (mode) {
	case TOC:
		cmd[1] |= 0x04;
		break;
	case DATA:
		cmd[1] &= ~0x04;
		break;
	case RAW:
		cmd[1] |= 0x40;
		break;
	case COOKED:
		cmd[1] &= ~0x40;
		break;
	default:
		break;
	}
	cmd[0] = 0x50;
	return mcdx_talk(stuffp, cmd, 2, NULL, 1, 5 * HZ, tries);
}

static int mcdx_setdatamode(struct s_drive_stuff *stuffp, enum datamodes mode,
		 int tries)
{
	unsigned char cmd[2] = { 0xa0 };
	xtrace(HW, "setdatamode() %d\n", mode);
	switch (mode) {
	case MODE0:
		cmd[1] = 0x00;
		break;
	case MODE1:
		cmd[1] = 0x01;
		break;
	case MODE2:
		cmd[1] = 0x02;
		break;
	default:
		return -EINVAL;
	}
	return mcdx_talk(stuffp, cmd, 2, NULL, 1, 5 * HZ, tries);
}

static int mcdx_config(struct s_drive_stuff *stuffp, int tries)
{
	char cmd[4];

	xtrace(HW, "config()\n");

	cmd[0] = 0x90;

	cmd[1] = 0x10;		/* irq enable */
	cmd[2] = 0x05;		/* pre, err irq enable */

	if (-1 == mcdx_talk(stuffp, cmd, 3, NULL, 1, 1 * HZ, tries))
		return -1;

	cmd[1] = 0x02;		/* dma select */
	cmd[2] = 0x00;		/* no dma */

	return mcdx_talk(stuffp, cmd, 3, NULL, 1, 1 * HZ, tries);
}

static int mcdx_requestversion(struct s_drive_stuff *stuffp, struct s_version *ver,
		    int tries)
{
	char buf[3];
	int ans;

	if (-1 == (ans = mcdx_talk(stuffp, "\xdc",
				   1, buf, sizeof(buf), 2 * HZ, tries)))
		return ans;

	ver->code = buf[1];
	ver->ver = buf[2];

	return ans;
}

static int mcdx_reset(struct s_drive_stuff *stuffp, enum resetmodes mode, int tries)
{
	if (mode == HARD) {
		outb(0, stuffp->wreg_chn);	/* no dma, no irq -> hardware */
		outb(0, stuffp->wreg_reset);	/* hw reset */
		return 0;
	} else
		return mcdx_talk(stuffp, "\x60", 1, NULL, 1, 5 * HZ, tries);
}

static int mcdx_lockdoor(struct cdrom_device_info *cdi, int lock)
{
	struct s_drive_stuff *stuffp = cdi->handle;
	char cmd[2] = { 0xfe };

	if (!(stuffp->present & DOOR))
		return -ENOSYS;
	if (stuffp->present & DOOR) {
		cmd[1] = lock ? 0x01 : 0x00;
		return mcdx_talk(stuffp, cmd, sizeof(cmd), NULL, 1, 5 * HZ, 3);
	} else
		return 0;
}

static int mcdx_getstatus(struct s_drive_stuff *stuffp, int tries)
{
	return mcdx_talk(stuffp, "\x40", 1, NULL, 1, 5 * HZ, tries);
}

static int
mcdx_getval(struct s_drive_stuff *stuffp, int to, int delay, char *buf)
{
	unsigned long timeout = to + jiffies;
	char c;

	if (!buf)
		buf = &c;

	while (inb(stuffp->rreg_status) & MCDX_RBIT_STEN) {
		if (time_after(jiffies, timeout))
			return -1;
		mcdx_delay(stuffp, delay);
	}

	*buf = (unsigned char) inb(stuffp->rreg_data) & 0xff;

	return 0;
}

static int mcdx_setattentuator(struct s_drive_stuff *stuffp,
		    struct cdrom_volctrl *vol, int tries)
{
	char cmd[5];
	cmd[0] = 0xae;
	cmd[1] = vol->channel0;
	cmd[2] = 0;
	cmd[3] = vol->channel1;
	cmd[4] = 0;

	return mcdx_talk(stuffp, cmd, sizeof(cmd), NULL, 5, 200, tries);
}

MODULE_LICENSE("GPL");
MODULE_ALIAS_BLOCKDEV_MAJOR(MITSUMI_X_CDROM_MAJOR);
OpenPOWER on IntegriCloud