aboutsummaryrefslogtreecommitdiff
path: root/drivers/block/xd.c
blob: 51a972704db503932d39e9ab917480af232bf4ce (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
/*
 * This file contains the driver for an XT hard disk controller
 * (at least the DTC 5150X) for Linux.
 *
 * Author: Pat Mackinlay, pat@it.com.au
 * Date: 29/09/92
 * 
 * Revised: 01/01/93, ...
 *
 * Ref: DTC 5150X Controller Specification (thanks to Kevin Fowler,
 *   kevinf@agora.rain.com)
 * Also thanks to: Salvador Abreu, Dave Thaler, Risto Kankkunen and
 *   Wim Van Dorst.
 *
 * Revised: 04/04/94 by Risto Kankkunen
 *   Moved the detection code from xd_init() to xd_geninit() as it needed
 *   interrupts enabled and Linus didn't want to enable them in that first
 *   phase. xd_geninit() is the place to do these kinds of things anyway,
 *   he says.
 *
 * Modularized: 04/10/96 by Todd Fries, tfries@umr.edu
 *
 * Revised: 13/12/97 by Andrzej Krzysztofowicz, ankry@mif.pg.gda.pl
 *   Fixed some problems with disk initialization and module initiation.
 *   Added support for manual geometry setting (except Seagate controllers)
 *   in form:
 *      xd_geo=<cyl_xda>,<head_xda>,<sec_xda>[,<cyl_xdb>,<head_xdb>,<sec_xdb>]
 *   Recovered DMA access. Abridged messages. Added support for DTC5051CX,
 *   WD1002-27X & XEBEC controllers. Driver uses now some jumper settings.
 *   Extended ioctl() support.
 *
 * Bugfix: 15/02/01, Paul G. - inform queue layer of tiny xd_maxsect.
 *
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/genhd.h>
#include <linux/hdreg.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/wait.h>
#include <linux/blkdev.h>
#include <linux/mutex.h>
#include <linux/blkpg.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/gfp.h>

#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/dma.h>

#include "xd.h"

static DEFINE_MUTEX(xd_mutex);
static void __init do_xd_setup (int *integers);
#ifdef MODULE
static int xd[5] = { -1,-1,-1,-1, };
#endif

#define XD_DONT_USE_DMA		0  /* Initial value. may be overriden using
				      "nodma" module option */
#define XD_INIT_DISK_DELAY	(30)  /* 30 ms delay during disk initialization */

/* Above may need to be increased if a problem with the 2nd drive detection
   (ST11M controller) or resetting a controller (WD) appears */

static XD_INFO xd_info[XD_MAXDRIVES];

/* If you try this driver and find that your card is not detected by the driver at bootup, you need to add your BIOS
   signature and details to the following list of signatures. A BIOS signature is a string embedded into the first
   few bytes of your controller's on-board ROM BIOS. To find out what yours is, use something like MS-DOS's DEBUG
   command. Run DEBUG, and then you can examine your BIOS signature with:

	d xxxx:0000

   where xxxx is the segment of your controller (like C800 or D000 or something). On the ASCII dump at the right, you should
   be able to see a string mentioning the manufacturer's copyright etc. Add this string into the table below. The parameters
   in the table are, in order:

	offset			; this is the offset (in bytes) from the start of your ROM where the signature starts
	signature		; this is the actual text of the signature
	xd_?_init_controller	; this is the controller init routine used by your controller
	xd_?_init_drive		; this is the drive init routine used by your controller

   The controllers directly supported at the moment are: DTC 5150x, WD 1004A27X, ST11M/R and override. If your controller is
   made by the same manufacturer as one of these, try using the same init routines as they do. If that doesn't work, your
   best bet is to use the "override" routines. These routines use a "portable" method of getting the disk's geometry, and
   may work with your card. If none of these seem to work, try sending me some email and I'll see what I can do <grin>.

   NOTE: You can now specify your XT controller's parameters from the command line in the form xd=TYPE,IRQ,IO,DMA. The driver
   should be able to detect your drive's geometry from this info. (eg: xd=0,5,0x320,3 is the "standard"). */

#include <asm/page.h>
#define xd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL,get_order(size))
#define xd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
static char *xd_dma_buffer;

static XD_SIGNATURE xd_sigs[] __initdata = {
	{ 0x0000,"Override geometry handler",NULL,xd_override_init_drive,"n unknown" }, /* Pat Mackinlay, pat@it.com.au */
	{ 0x0008,"[BXD06 (C) DTC 17-MAY-1985]",xd_dtc_init_controller,xd_dtc5150cx_init_drive," DTC 5150CX" }, /* Andrzej Krzysztofowicz, ankry@mif.pg.gda.pl */
	{ 0x000B,"CRD18A   Not an IBM rom. (C) Copyright Data Technology Corp. 05/31/88",xd_dtc_init_controller,xd_dtc_init_drive," DTC 5150X" }, /* Todd Fries, tfries@umr.edu */
	{ 0x000B,"CXD23A Not an IBM ROM (C)Copyright Data Technology Corp 12/03/88",xd_dtc_init_controller,xd_dtc_init_drive," DTC 5150X" }, /* Pat Mackinlay, pat@it.com.au */
	{ 0x0008,"07/15/86(C) Copyright 1986 Western Digital Corp.",xd_wd_init_controller,xd_wd_init_drive," Western Dig. 1002-27X" }, /* Andrzej Krzysztofowicz, ankry@mif.pg.gda.pl */
	{ 0x0008,"06/24/88(C) Copyright 1988 Western Digital Corp.",xd_wd_init_controller,xd_wd_init_drive," Western Dig. WDXT-GEN2" }, /* Dan Newcombe, newcombe@aa.csc.peachnet.edu */
	{ 0x0015,"SEAGATE ST11 BIOS REVISION",xd_seagate_init_controller,xd_seagate_init_drive," Seagate ST11M/R" }, /* Salvador Abreu, spa@fct.unl.pt */
	{ 0x0010,"ST11R BIOS",xd_seagate_init_controller,xd_seagate_init_drive," Seagate ST11M/R" }, /* Risto Kankkunen, risto.kankkunen@cs.helsinki.fi */
	{ 0x0010,"ST11 BIOS v1.7",xd_seagate_init_controller,xd_seagate_init_drive," Seagate ST11R" }, /* Alan Hourihane, alanh@fairlite.demon.co.uk */
	{ 0x1000,"(c)Copyright 1987 SMS",xd_omti_init_controller,xd_omti_init_drive,"n OMTI 5520" }, /* Dirk Melchers, dirk@merlin.nbg.sub.org */
	{ 0x0006,"COPYRIGHT XEBEC (C) 1984",xd_xebec_init_controller,xd_xebec_init_drive," XEBEC" }, /* Andrzej Krzysztofowicz, ankry@mif.pg.gda.pl */
	{ 0x0008,"(C) Copyright 1984 Western Digital Corp", xd_wd_init_controller, xd_wd_init_drive," Western Dig. 1002s-wx2" },
	{ 0x0008,"(C) Copyright 1986 Western Digital Corporation", xd_wd_init_controller, xd_wd_init_drive," 1986 Western Digital" }, /* jfree@sovereign.org */
};

static unsigned int xd_bases[] __initdata =
{
	0xC8000, 0xCA000, 0xCC000,
	0xCE000, 0xD0000, 0xD2000,
	0xD4000, 0xD6000, 0xD8000,
	0xDA000, 0xDC000, 0xDE000,
	0xE0000
};

static DEFINE_SPINLOCK(xd_lock);

static struct gendisk *xd_gendisk[2];

static int xd_getgeo(struct block_device *bdev, struct hd_geometry *geo);

static const struct block_device_operations xd_fops = {
	.owner	= THIS_MODULE,
	.ioctl	= xd_ioctl,
	.getgeo = xd_getgeo,
};
static DECLARE_WAIT_QUEUE_HEAD(xd_wait_int);
static u_char xd_drives, xd_irq = 5, xd_dma = 3, xd_maxsectors;
static u_char xd_override __initdata = 0, xd_type __initdata = 0;
static u_short xd_iobase = 0x320;
static int xd_geo[XD_MAXDRIVES*3] __initdata = { 0, };

static volatile int xdc_busy;
static struct timer_list xd_watchdog_int;

static volatile u_char xd_error;
static bool nodma = XD_DONT_USE_DMA;

static struct request_queue *xd_queue;

/* xd_init: register the block device number and set up pointer tables */
static int __init xd_init(void)
{
	u_char i,controller;
	unsigned int address;
	int err;

#ifdef MODULE
	{
		u_char count = 0;
		for (i = 4; i > 0; i--)
			if (((xd[i] = xd[i-1]) >= 0) && !count)
				count = i;
		if ((xd[0] = count))
			do_xd_setup(xd);
	}
#endif

	init_timer (&xd_watchdog_int); xd_watchdog_int.function = xd_watchdog;

	err = -EBUSY;
	if (register_blkdev(XT_DISK_MAJOR, "xd"))
		goto out1;

	err = -ENOMEM;
	xd_queue = blk_init_queue(do_xd_request, &xd_lock);
	if (!xd_queue)
		goto out1a;

	if (xd_detect(&controller,&address)) {

		printk("Detected a%s controller (type %d) at address %06x\n",
			xd_sigs[controller].name,controller,address);
		if (!request_region(xd_iobase,4,"xd")) {
			printk("xd: Ports at 0x%x are not available\n",
				xd_iobase);
			goto out2;
		}
		if (controller)
			xd_sigs[controller].init_controller(address);
		xd_drives = xd_initdrives(xd_sigs[controller].init_drive);
		
		printk("Detected %d hard drive%s (using IRQ%d & DMA%d)\n",
			xd_drives,xd_drives == 1 ? "" : "s",xd_irq,xd_dma);
	}

	/*
	 * With the drive detected, xd_maxsectors should now be known.
	 * If xd_maxsectors is 0, nothing was detected and we fall through
	 * to return -ENODEV
	 */
	if (!xd_dma_buffer && xd_maxsectors) {
		xd_dma_buffer = (char *)xd_dma_mem_alloc(xd_maxsectors * 0x200);
		if (!xd_dma_buffer) {
			printk(KERN_ERR "xd: Out of memory.\n");
			goto out3;
		}
	}

	err = -ENODEV;
	if (!xd_drives)
		goto out3;

	for (i = 0; i < xd_drives; i++) {
		XD_INFO *p = &xd_info[i];
		struct gendisk *disk = alloc_disk(64);
		if (!disk)
			goto Enomem;
		p->unit = i;
		disk->major = XT_DISK_MAJOR;
		disk->first_minor = i<<6;
		sprintf(disk->disk_name, "xd%c", i+'a');
		disk->fops = &xd_fops;
		disk->private_data = p;
		disk->queue = xd_queue;
		set_capacity(disk, p->heads * p->cylinders * p->sectors);
		printk(" %s: CHS=%d/%d/%d\n", disk->disk_name,
			p->cylinders, p->heads, p->sectors);
		xd_gendisk[i] = disk;
	}

	err = -EBUSY;
	if (request_irq(xd_irq,xd_interrupt_handler, 0, "XT hard disk", NULL)) {
		printk("xd: unable to get IRQ%d\n",xd_irq);
		goto out4;
	}

	if (request_dma(xd_dma,"xd")) {
		printk("xd: unable to get DMA%d\n",xd_dma);
		goto out5;
	}

	/* xd_maxsectors depends on controller - so set after detection */
	blk_queue_max_hw_sectors(xd_queue, xd_maxsectors);

	for (i = 0; i < xd_drives; i++)
		add_disk(xd_gendisk[i]);

	return 0;

out5:
	free_irq(xd_irq, NULL);
out4:
	for (i = 0; i < xd_drives; i++)
		put_disk(xd_gendisk[i]);
out3:
	if (xd_maxsectors)
		release_region(xd_iobase,4);

	if (xd_dma_buffer)
		xd_dma_mem_free((unsigned long)xd_dma_buffer,
				xd_maxsectors * 0x200);
out2:
	blk_cleanup_queue(xd_queue);
out1a:
	unregister_blkdev(XT_DISK_MAJOR, "xd");
out1:
	return err;
Enomem:
	err = -ENOMEM;
	while (i--)
		put_disk(xd_gendisk[i]);
	goto out3;
}

/* xd_detect: scan the possible BIOS ROM locations for the signature strings */
static u_char __init xd_detect (u_char *controller, unsigned int *address)
{
	int i, j;

	if (xd_override)
	{
		*controller = xd_type;
		*address = 0;
		return(1);
	}

	for (i = 0; i < ARRAY_SIZE(xd_bases); i++) {
		void __iomem *p = ioremap(xd_bases[i], 0x2000);
		if (!p)
			continue;
		for (j = 1; j < ARRAY_SIZE(xd_sigs); j++) {
			const char *s = xd_sigs[j].string;
			if (check_signature(p + xd_sigs[j].offset, s, strlen(s))) {
				*controller = j;
				xd_type = j;
				*address = xd_bases[i];
				iounmap(p);
				return 1;
			}
		}
		iounmap(p);
	}
	return 0;
}

/* do_xd_request: handle an incoming request */
static void do_xd_request (struct request_queue * q)
{
	struct request *req;

	if (xdc_busy)
		return;

	req = blk_fetch_request(q);
	while (req) {
		unsigned block = blk_rq_pos(req);
		unsigned count = blk_rq_cur_sectors(req);
		XD_INFO *disk = req->rq_disk->private_data;
		int res = -EIO;
		int retry;

		if (req->cmd_type != REQ_TYPE_FS)
			goto done;
		if (block + count > get_capacity(req->rq_disk))
			goto done;
		for (retry = 0; (retry < XD_RETRIES) && !res; retry++)
			res = xd_readwrite(rq_data_dir(req), disk, req->buffer,
					   block, count);
	done:
		/* wrap up, 0 = success, -errno = fail */
		if (!__blk_end_request_cur(req, res))
			req = blk_fetch_request(q);
	}
}

static int xd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
	XD_INFO *p = bdev->bd_disk->private_data;

	geo->heads = p->heads;
	geo->sectors = p->sectors;
	geo->cylinders = p->cylinders;
	return 0;
}

/* xd_ioctl: handle device ioctl's */
static int xd_locked_ioctl(struct block_device *bdev, fmode_t mode, u_int cmd, u_long arg)
{
	switch (cmd) {
		case HDIO_SET_DMA:
			if (!capable(CAP_SYS_ADMIN)) return -EACCES;
			if (xdc_busy) return -EBUSY;
			nodma = !arg;
			if (nodma && xd_dma_buffer) {
				xd_dma_mem_free((unsigned long)xd_dma_buffer,
						xd_maxsectors * 0x200);
				xd_dma_buffer = NULL;
			} else if (!nodma && !xd_dma_buffer) {
				xd_dma_buffer = (char *)xd_dma_mem_alloc(xd_maxsectors * 0x200);
				if (!xd_dma_buffer) {
					nodma = XD_DONT_USE_DMA;
					return -ENOMEM;
				}
			}
			return 0;
		case HDIO_GET_DMA:
			return put_user(!nodma, (long __user *) arg);
		case HDIO_GET_MULTCOUNT:
			return put_user(xd_maxsectors, (long __user *) arg);
		default:
			return -EINVAL;
	}
}

static int xd_ioctl(struct block_device *bdev, fmode_t mode,
			     unsigned int cmd, unsigned long param)
{
	int ret;

	mutex_lock(&xd_mutex);
	ret = xd_locked_ioctl(bdev, mode, cmd, param);
	mutex_unlock(&xd_mutex);

	return ret;
}

/* xd_readwrite: handle a read/write request */
static int xd_readwrite (u_char operation,XD_INFO *p,char *buffer,u_int block,u_int count)
{
	int drive = p->unit;
	u_char cmdblk[6],sense[4];
	u_short track,cylinder;
	u_char head,sector,control,mode = PIO_MODE,temp;
	char **real_buffer;
	register int i;
	
#ifdef DEBUG_READWRITE
	printk("xd_readwrite: operation = %s, drive = %d, buffer = 0x%X, block = %d, count = %d\n",operation == READ ? "read" : "write",drive,buffer,block,count);
#endif /* DEBUG_READWRITE */

	spin_unlock_irq(&xd_lock);

	control = p->control;
	if (!xd_dma_buffer)
		xd_dma_buffer = (char *)xd_dma_mem_alloc(xd_maxsectors * 0x200);
	while (count) {
		temp = count < xd_maxsectors ? count : xd_maxsectors;

		track = block / p->sectors;
		head = track % p->heads;
		cylinder = track / p->heads;
		sector = block % p->sectors;

#ifdef DEBUG_READWRITE
		printk("xd_readwrite: drive = %d, head = %d, cylinder = %d, sector = %d, count = %d\n",drive,head,cylinder,sector,temp);
#endif /* DEBUG_READWRITE */

		if (xd_dma_buffer) {
			mode = xd_setup_dma(operation == READ ? DMA_MODE_READ : DMA_MODE_WRITE,(u_char *)(xd_dma_buffer),temp * 0x200);
			real_buffer = &xd_dma_buffer;
			for (i=0; i < (temp * 0x200); i++)
				xd_dma_buffer[i] = buffer[i];
		}
		else
			real_buffer = &buffer;

		xd_build(cmdblk,operation == READ ? CMD_READ : CMD_WRITE,drive,head,cylinder,sector,temp & 0xFF,control);

		switch (xd_command(cmdblk,mode,(u_char *)(*real_buffer),(u_char *)(*real_buffer),sense,XD_TIMEOUT)) {
			case 1:
				printk("xd%c: %s timeout, recalibrating drive\n",'a'+drive,(operation == READ ? "read" : "write"));
				xd_recalibrate(drive);
				spin_lock_irq(&xd_lock);
				return -EIO;
			case 2:
				if (sense[0] & 0x30) {
					printk("xd%c: %s - ",'a'+drive,(operation == READ ? "reading" : "writing"));
					switch ((sense[0] & 0x30) >> 4) {
					case 0: printk("drive error, code = 0x%X",sense[0] & 0x0F);
						break;
					case 1: printk("controller error, code = 0x%X",sense[0] & 0x0F);
						break;
					case 2: printk("command error, code = 0x%X",sense[0] & 0x0F);
						break;
					case 3: printk("miscellaneous error, code = 0x%X",sense[0] & 0x0F);
						break;
					}
				}
				if (sense[0] & 0x80)
					printk(" - CHS = %d/%d/%d\n",((sense[2] & 0xC0) << 2) | sense[3],sense[1] & 0x1F,sense[2] & 0x3F);
				/*	reported drive number = (sense[1] & 0xE0) >> 5 */
				else
					printk(" - no valid disk address\n");
				spin_lock_irq(&xd_lock);
				return -EIO;
		}
		if (xd_dma_buffer)
			for (i=0; i < (temp * 0x200); i++)
				buffer[i] = xd_dma_buffer[i];

		count -= temp, buffer += temp * 0x200, block += temp;
	}
	spin_lock_irq(&xd_lock);
	return 0;
}

/* xd_recalibrate: recalibrate a given drive and reset controller if necessary */
static void xd_recalibrate (u_char drive)
{
	u_char cmdblk[6];
	
	xd_build(cmdblk,CMD_RECALIBRATE,drive,0,0,0,0,0);
	if (xd_command(cmdblk,PIO_MODE,NULL,NULL,NULL,XD_TIMEOUT * 8))
		printk("xd%c: warning! error recalibrating, controller may be unstable\n", 'a'+drive);
}

/* xd_interrupt_handler: interrupt service routine */
static irqreturn_t xd_interrupt_handler(int irq, void *dev_id)
{
	if (inb(XD_STATUS) & STAT_INTERRUPT) {							/* check if it was our device */
#ifdef DEBUG_OTHER
		printk("xd_interrupt_handler: interrupt detected\n");
#endif /* DEBUG_OTHER */
		outb(0,XD_CONTROL);								/* acknowledge interrupt */
		wake_up(&xd_wait_int);	/* and wake up sleeping processes */
		return IRQ_HANDLED;
	}
	else
		printk("xd: unexpected interrupt\n");
	return IRQ_NONE;
}

/* xd_setup_dma: set up the DMA controller for a data transfer */
static u_char xd_setup_dma (u_char mode,u_char *buffer,u_int count)
{
	unsigned long f;
	
	if (nodma)
		return (PIO_MODE);
	if (((unsigned long) buffer & 0xFFFF0000) != (((unsigned long) buffer + count) & 0xFFFF0000)) {
#ifdef DEBUG_OTHER
		printk("xd_setup_dma: using PIO, transfer overlaps 64k boundary\n");
#endif /* DEBUG_OTHER */
		return (PIO_MODE);
	}
	
	f=claim_dma_lock();
	disable_dma(xd_dma);
	clear_dma_ff(xd_dma);
	set_dma_mode(xd_dma,mode);
	set_dma_addr(xd_dma, (unsigned long) buffer);
	set_dma_count(xd_dma,count);
	
	release_dma_lock(f);

	return (DMA_MODE);			/* use DMA and INT */
}

/* xd_build: put stuff into an array in a format suitable for the controller */
static u_char *xd_build (u_char *cmdblk,u_char command,u_char drive,u_char head,u_short cylinder,u_char sector,u_char count,u_char control)
{
	cmdblk[0] = command;
	cmdblk[1] = ((drive & 0x07) << 5) | (head & 0x1F);
	cmdblk[2] = ((cylinder & 0x300) >> 2) | (sector & 0x3F);
	cmdblk[3] = cylinder & 0xFF;
	cmdblk[4] = count;
	cmdblk[5] = control;
	
	return (cmdblk);
}

static void xd_watchdog (unsigned long unused)
{
	xd_error = 1;
	wake_up(&xd_wait_int);
}

/* xd_waitport: waits until port & mask == flags or a timeout occurs. return 1 for a timeout */
static inline u_char xd_waitport (u_short port,u_char flags,u_char mask,u_long timeout)
{
	u_long expiry = jiffies + timeout;
	int success;

	xdc_busy = 1;
	while ((success = ((inb(port) & mask) != flags)) && time_before(jiffies, expiry))
		schedule_timeout_uninterruptible(1);
	xdc_busy = 0;
	return (success);
}

static inline u_int xd_wait_for_IRQ (void)
{
	unsigned long flags;
	xd_watchdog_int.expires = jiffies + 8 * HZ;
	add_timer(&xd_watchdog_int);
	
	flags=claim_dma_lock();
	enable_dma(xd_dma);
	release_dma_lock(flags);
	
	sleep_on(&xd_wait_int);
	del_timer(&xd_watchdog_int);
	xdc_busy = 0;
	
	flags=claim_dma_lock();
	disable_dma(xd_dma);
	release_dma_lock(flags);
	
	if (xd_error) {
		printk("xd: missed IRQ - command aborted\n");
		xd_error = 0;
		return (1);
	}
	return (0);
}

/* xd_command: handle all data transfers necessary for a single command */
static u_int xd_command (u_char *command,u_char mode,u_char *indata,u_char *outdata,u_char *sense,u_long timeout)
{
	u_char cmdblk[6],csb,complete = 0;

#ifdef DEBUG_COMMAND
	printk("xd_command: command = 0x%X, mode = 0x%X, indata = 0x%X, outdata = 0x%X, sense = 0x%X\n",command,mode,indata,outdata,sense);
#endif /* DEBUG_COMMAND */

	outb(0,XD_SELECT);
	outb(mode,XD_CONTROL);

	if (xd_waitport(XD_STATUS,STAT_SELECT,STAT_SELECT,timeout))
		return (1);

	while (!complete) {
		if (xd_waitport(XD_STATUS,STAT_READY,STAT_READY,timeout))
			return (1);

		switch (inb(XD_STATUS) & (STAT_COMMAND | STAT_INPUT)) {
			case 0:
				if (mode == DMA_MODE) {
					if (xd_wait_for_IRQ())
						return (1);
				} else
					outb(outdata ? *outdata++ : 0,XD_DATA);
				break;
			case STAT_INPUT:
				if (mode == DMA_MODE) {
					if (xd_wait_for_IRQ())
						return (1);
				} else
					if (indata)
						*indata++ = inb(XD_DATA);
					else
						inb(XD_DATA);
				break;
			case STAT_COMMAND:
				outb(command ? *command++ : 0,XD_DATA);
				break;
			case STAT_COMMAND | STAT_INPUT:
				complete = 1;
				break;
		}
	}
	csb = inb(XD_DATA);

	if (xd_waitport(XD_STATUS,0,STAT_SELECT,timeout))					/* wait until deselected */
		return (1);

	if (csb & CSB_ERROR) {									/* read sense data if error */
		xd_build(cmdblk,CMD_SENSE,(csb & CSB_LUN) >> 5,0,0,0,0,0);
		if (xd_command(cmdblk,0,sense,NULL,NULL,XD_TIMEOUT))
			printk("xd: warning! sense command failed!\n");
	}

#ifdef DEBUG_COMMAND
	printk("xd_command: completed with csb = 0x%X\n",csb);
#endif /* DEBUG_COMMAND */

	return (csb & CSB_ERROR);
}

static u_char __init xd_initdrives (void (*init_drive)(u_char drive))
{
	u_char cmdblk[6],i,count = 0;

	for (i = 0; i < XD_MAXDRIVES; i++) {
		xd_build(cmdblk,CMD_TESTREADY,i,0,0,0,0,0);
		if (!xd_command(cmdblk,PIO_MODE,NULL,NULL,NULL,XD_TIMEOUT*8)) {
			msleep_interruptible(XD_INIT_DISK_DELAY);

			init_drive(count);
			count++;

			msleep_interruptible(XD_INIT_DISK_DELAY);
		}
	}
	return (count);
}

static void __init xd_manual_geo_set (u_char drive)
{
	xd_info[drive].heads = (u_char)(xd_geo[3 * drive + 1]);
	xd_info[drive].cylinders = (u_short)(xd_geo[3 * drive]);
	xd_info[drive].sectors = (u_char)(xd_geo[3 * drive + 2]);
}

static void __init xd_dtc_init_controller (unsigned int address)
{
	switch (address) {
		case 0x00000:
		case 0xC8000:	break;			/*initial: 0x320 */
		case 0xCA000:	xd_iobase = 0x324; 
		case 0xD0000:				/*5150CX*/
		case 0xD8000:	break;			/*5150CX & 5150XL*/
		default:        printk("xd_dtc_init_controller: unsupported BIOS address %06x\n",address);
				break;
	}
	xd_maxsectors = 0x01;		/* my card seems to have trouble doing multi-block transfers? */

	outb(0,XD_RESET);		/* reset the controller */
}


static void __init xd_dtc5150cx_init_drive (u_char drive)
{
	/* values from controller's BIOS - BIOS chip may be removed */
	static u_short geometry_table[][4] = {
		{0x200,8,0x200,0x100},
		{0x267,2,0x267,0x267},
		{0x264,4,0x264,0x80},
		{0x132,4,0x132,0x0},
		{0x132,2,0x80, 0x132},
		{0x177,8,0x177,0x0},
		{0x132,8,0x84, 0x0},
		{},  /* not used */
		{0x132,6,0x80, 0x100},
		{0x200,6,0x100,0x100},
		{0x264,2,0x264,0x80},
		{0x280,4,0x280,0x100},
		{0x2B9,3,0x2B9,0x2B9},
		{0x2B9,5,0x2B9,0x2B9},
		{0x280,6,0x280,0x100},
		{0x132,4,0x132,0x0}};
	u_char n;

	n = inb(XD_JUMPER);
	n = (drive ? n : (n >> 2)) & 0x33;
	n = (n | (n >> 2)) & 0x0F;
	if (xd_geo[3*drive])
		xd_manual_geo_set(drive);
	else
		if (n != 7) {	
			xd_info[drive].heads = (u_char)(geometry_table[n][1]);			/* heads */
			xd_info[drive].cylinders = geometry_table[n][0];	/* cylinders */
			xd_info[drive].sectors = 17;				/* sectors */
#if 0
			xd_info[drive].rwrite = geometry_table[n][2];	/* reduced write */
			xd_info[drive].precomp = geometry_table[n][3]		/* write precomp */
			xd_info[drive].ecc = 0x0B;				/* ecc length */
#endif /* 0 */
		}
		else {
			printk("xd%c: undetermined drive geometry\n",'a'+drive);
			return;
		}
	xd_info[drive].control = 5;				/* control byte */
	xd_setparam(CMD_DTCSETPARAM,drive,xd_info[drive].heads,xd_info[drive].cylinders,geometry_table[n][2],geometry_table[n][3],0x0B);
	xd_recalibrate(drive);
}

static void __init xd_dtc_init_drive (u_char drive)
{
	u_char cmdblk[6],buf[64];

	xd_build(cmdblk,CMD_DTCGETGEOM,drive,0,0,0,0,0);
	if (!xd_command(cmdblk,PIO_MODE,buf,NULL,NULL,XD_TIMEOUT * 2)) {
		xd_info[drive].heads = buf[0x0A];			/* heads */
		xd_info[drive].cylinders = ((u_short *) (buf))[0x04];	/* cylinders */
		xd_info[drive].sectors = 17;				/* sectors */
		if (xd_geo[3*drive])
			xd_manual_geo_set(drive);
#if 0
		xd_info[drive].rwrite = ((u_short *) (buf + 1))[0x05];	/* reduced write */
		xd_info[drive].precomp = ((u_short *) (buf + 1))[0x06];	/* write precomp */
		xd_info[drive].ecc = buf[0x0F];				/* ecc length */
#endif /* 0 */
		xd_info[drive].control = 0;				/* control byte */

		xd_setparam(CMD_DTCSETPARAM,drive,xd_info[drive].heads,xd_info[drive].cylinders,((u_short *) (buf + 1))[0x05],((u_short *) (buf + 1))[0x06],buf[0x0F]);
		xd_build(cmdblk,CMD_DTCSETSTEP,drive,0,0,0,0,7);
		if (xd_command(cmdblk,PIO_MODE,NULL,NULL,NULL,XD_TIMEOUT * 2))
			printk("xd_dtc_init_drive: error setting step rate for xd%c\n", 'a'+drive);
	}
	else
		printk("xd_dtc_init_drive: error reading geometry for xd%c\n", 'a'+drive);
}

static void __init xd_wd_init_controller (unsigned int address)
{
	switch (address) {
		case 0x00000:
		case 0xC8000:	break;			/*initial: 0x320 */
		case 0xCA000:	xd_iobase = 0x324; break;
		case 0xCC000:   xd_iobase = 0x328; break;
		case 0xCE000:   xd_iobase = 0x32C; break;
		case 0xD0000:	xd_iobase = 0x328; break; /* ? */
		case 0xD8000:	xd_iobase = 0x32C; break; /* ? */
		default:        printk("xd_wd_init_controller: unsupported BIOS address %06x\n",address);
				break;
	}
	xd_maxsectors = 0x01;		/* this one doesn't wrap properly either... */

	outb(0,XD_RESET);		/* reset the controller */

	msleep(XD_INIT_DISK_DELAY);
}

static void __init xd_wd_init_drive (u_char drive)
{
	/* values from controller's BIOS - BIOS may be disabled */
	static u_short geometry_table[][4] = {
		{0x264,4,0x1C2,0x1C2},   /* common part */
		{0x132,4,0x099,0x0},
		{0x267,2,0x1C2,0x1C2},
		{0x267,4,0x1C2,0x1C2},

		{0x334,6,0x335,0x335},   /* 1004 series RLL */
		{0x30E,4,0x30F,0x3DC},
		{0x30E,2,0x30F,0x30F},
		{0x267,4,0x268,0x268},

		{0x3D5,5,0x3D6,0x3D6},   /* 1002 series RLL */
		{0x3DB,7,0x3DC,0x3DC},
		{0x264,4,0x265,0x265},
		{0x267,4,0x268,0x268}};

	u_char cmdblk[6],buf[0x200];
	u_char n = 0,rll,jumper_state,use_jumper_geo;
	u_char wd_1002 = (xd_sigs[xd_type].string[7] == '6');
	
	jumper_state = ~(inb(0x322));
	if (jumper_state & 0x40)
		xd_irq = 9;
	rll = (jumper_state & 0x30) ? (0x04 << wd_1002) : 0;
	xd_build(cmdblk,CMD_READ,drive,0,0,0,1,0);
	if (!xd_command(cmdblk,PIO_MODE,buf,NULL,NULL,XD_TIMEOUT * 2)) {
		xd_info[drive].heads = buf[0x1AF];				/* heads */
		xd_info[drive].cylinders = ((u_short *) (buf + 1))[0xD6];	/* cylinders */
		xd_info[drive].sectors = 17;					/* sectors */
		if (xd_geo[3*drive])
			xd_manual_geo_set(drive);
#if 0
		xd_info[drive].rwrite = ((u_short *) (buf))[0xD8];		/* reduced write */
		xd_info[drive].wprecomp = ((u_short *) (buf))[0xDA];		/* write precomp */
		xd_info[drive].ecc = buf[0x1B4];				/* ecc length */
#endif /* 0 */
		xd_info[drive].control = buf[0x1B5];				/* control byte */
		use_jumper_geo = !(xd_info[drive].heads) || !(xd_info[drive].cylinders);
		if (xd_geo[3*drive]) {
			xd_manual_geo_set(drive);
			xd_info[drive].control = rll ? 7 : 5;
		}
		else if (use_jumper_geo) {
			n = (((jumper_state & 0x0F) >> (drive << 1)) & 0x03) | rll;
			xd_info[drive].cylinders = geometry_table[n][0];
			xd_info[drive].heads = (u_char)(geometry_table[n][1]);
			xd_info[drive].control = rll ? 7 : 5;
#if 0
			xd_info[drive].rwrite = geometry_table[n][2];
			xd_info[drive].wprecomp = geometry_table[n][3];
			xd_info[drive].ecc = 0x0B;
#endif /* 0 */
		}
		if (!wd_1002) {
			if (use_jumper_geo)
				xd_setparam(CMD_WDSETPARAM,drive,xd_info[drive].heads,xd_info[drive].cylinders,
					geometry_table[n][2],geometry_table[n][3],0x0B);
			else
				xd_setparam(CMD_WDSETPARAM,drive,xd_info[drive].heads,xd_info[drive].cylinders,
					((u_short *) (buf))[0xD8],((u_short *) (buf))[0xDA],buf[0x1B4]);
		}
	/* 1002 based RLL controller requests converted addressing, but reports physical 
	   (physical 26 sec., logical 17 sec.) 
	   1004 based ???? */
		if (rll & wd_1002) {
			if ((xd_info[drive].cylinders *= 26,
			     xd_info[drive].cylinders /= 17) > 1023)
				xd_info[drive].cylinders = 1023;  /* 1024 ? */
#if 0
			xd_info[drive].rwrite *= 26; 
			xd_info[drive].rwrite /= 17;
			xd_info[drive].wprecomp *= 26
			xd_info[drive].wprecomp /= 17;
#endif /* 0 */
		}
	}
	else
		printk("xd_wd_init_drive: error reading geometry for xd%c\n",'a'+drive);	

}

static void __init xd_seagate_init_controller (unsigned int address)
{
	switch (address) {
		case 0x00000:
		case 0xC8000:	break;			/*initial: 0x320 */
		case 0xD0000:	xd_iobase = 0x324; break;
		case 0xD8000:	xd_iobase = 0x328; break;
		case 0xE0000:	xd_iobase = 0x32C; break;
		default:	printk("xd_seagate_init_controller: unsupported BIOS address %06x\n",address);
				break;
	}
	xd_maxsectors = 0x40;

	outb(0,XD_RESET);		/* reset the controller */
}

static void __init xd_seagate_init_drive (u_char drive)
{
	u_char cmdblk[6],buf[0x200];

	xd_build(cmdblk,CMD_ST11GETGEOM,drive,0,0,0,1,0);
	if (!xd_command(cmdblk,PIO_MODE,buf,NULL,NULL,XD_TIMEOUT * 2)) {
		xd_info[drive].heads = buf[0x04];				/* heads */
		xd_info[drive].cylinders = (buf[0x02] << 8) | buf[0x03];	/* cylinders */
		xd_info[drive].sectors = buf[0x05];				/* sectors */
		xd_info[drive].control = 0;					/* control byte */
	}
	else
		printk("xd_seagate_init_drive: error reading geometry from xd%c\n", 'a'+drive);
}

/* Omti support courtesy Dirk Melchers */
static void __init xd_omti_init_controller (unsigned int address)
{
	switch (address) {
		case 0x00000:
		case 0xC8000:	break;			/*initial: 0x320 */
		case 0xD0000:	xd_iobase = 0x324; break;
		case 0xD8000:	xd_iobase = 0x328; break;
		case 0xE0000:	xd_iobase = 0x32C; break;
		default:	printk("xd_omti_init_controller: unsupported BIOS address %06x\n",address);
				break;
	}
	
	xd_maxsectors = 0x40;

	outb(0,XD_RESET);		/* reset the controller */
}

static void __init xd_omti_init_drive (u_char drive)
{
	/* gets infos from drive */
	xd_override_init_drive(drive);

	/* set other parameters, Hardcoded, not that nice :-) */
	xd_info[drive].control = 2;
}

/* Xebec support (AK) */
static void __init xd_xebec_init_controller (unsigned int address)
{
/* iobase may be set manually in range 0x300 - 0x33C
      irq may be set manually to 2(9),3,4,5,6,7
      dma may be set manually to 1,2,3
	(How to detect them ???)
BIOS address may be set manually in range 0x0 - 0xF8000
If you need non-standard settings use the xd=... command */

	switch (address) {
		case 0x00000:
		case 0xC8000:	/* initially: xd_iobase==0x320 */
		case 0xD0000:
		case 0xD2000:
		case 0xD4000:
		case 0xD6000:
		case 0xD8000:
		case 0xDA000:
		case 0xDC000:
		case 0xDE000:
		case 0xE0000:	break;
		default:	printk("xd_xebec_init_controller: unsupported BIOS address %06x\n",address);
				break;
		}

	xd_maxsectors = 0x01;
	outb(0,XD_RESET);		/* reset the controller */

	msleep(XD_INIT_DISK_DELAY);
}

static void __init xd_xebec_init_drive (u_char drive)
{
	/* values from controller's BIOS - BIOS chip may be removed */
	static u_short geometry_table[][5] = {
		{0x132,4,0x080,0x080,0x7},
		{0x132,4,0x080,0x080,0x17},
		{0x264,2,0x100,0x100,0x7},
		{0x264,2,0x100,0x100,0x17},
		{0x132,8,0x080,0x080,0x7},
		{0x132,8,0x080,0x080,0x17},
		{0x264,4,0x100,0x100,0x6},
		{0x264,4,0x100,0x100,0x17},
		{0x2BC,5,0x2BC,0x12C,0x6},
		{0x3A5,4,0x3A5,0x3A5,0x7},
		{0x26C,6,0x26C,0x26C,0x7},
		{0x200,8,0x200,0x100,0x17},
		{0x400,5,0x400,0x400,0x7},
		{0x400,6,0x400,0x400,0x7},
		{0x264,8,0x264,0x200,0x17},
		{0x33E,7,0x33E,0x200,0x7}};
	u_char n;

	n = inb(XD_JUMPER) & 0x0F; /* BIOS's drive number: same geometry 
					is assumed for BOTH drives */
	if (xd_geo[3*drive])
		xd_manual_geo_set(drive);
	else {
		xd_info[drive].heads = (u_char)(geometry_table[n][1]);			/* heads */
		xd_info[drive].cylinders = geometry_table[n][0];	/* cylinders */
		xd_info[drive].sectors = 17;				/* sectors */
#if 0
		xd_info[drive].rwrite = geometry_table[n][2];	/* reduced write */
		xd_info[drive].precomp = geometry_table[n][3]		/* write precomp */
		xd_info[drive].ecc = 0x0B;				/* ecc length */
#endif /* 0 */
	}
	xd_info[drive].control = geometry_table[n][4];			/* control byte */
	xd_setparam(CMD_XBSETPARAM,drive,xd_info[drive].heads,xd_info[drive].cylinders,geometry_table[n][2],geometry_table[n][3],0x0B);
	xd_recalibrate(drive);
}

/* xd_override_init_drive: this finds disk geometry in a "binary search" style, narrowing in on the "correct" number of heads
   etc. by trying values until it gets the highest successful value. Idea courtesy Salvador Abreu (spa@fct.unl.pt). */
static void __init xd_override_init_drive (u_char drive)
{
	u_short min[] = { 0,0,0 },max[] = { 16,1024,64 },test[] = { 0,0,0 };
	u_char cmdblk[6],i;

	if (xd_geo[3*drive])
		xd_manual_geo_set(drive);
	else {
		for (i = 0; i < 3; i++) {
			while (min[i] != max[i] - 1) {
				test[i] = (min[i] + max[i]) / 2;
				xd_build(cmdblk,CMD_SEEK,drive,(u_char) test[0],(u_short) test[1],(u_char) test[2],0,0);
				if (!xd_command(cmdblk,PIO_MODE,NULL,NULL,NULL,XD_TIMEOUT * 2))
					min[i] = test[i];
				else
					max[i] = test[i];
			}
			test[i] = min[i];
		}
		xd_info[drive].heads = (u_char) min[0] + 1;
		xd_info[drive].cylinders = (u_short) min[1] + 1;
		xd_info[drive].sectors = (u_char) min[2] + 1;
	}
	xd_info[drive].control = 0;
}

/* xd_setup: initialise controller from command line parameters */
static void __init do_xd_setup (int *integers)
{
	switch (integers[0]) {
		case 4: if (integers[4] < 0)
				nodma = 1;
			else if (integers[4] < 8)
				xd_dma = integers[4];
		case 3: if ((integers[3] > 0) && (integers[3] <= 0x3FC))
				xd_iobase = integers[3];
		case 2: if ((integers[2] > 0) && (integers[2] < 16))
				xd_irq = integers[2];
		case 1: xd_override = 1;
			if ((integers[1] >= 0) && (integers[1] < ARRAY_SIZE(xd_sigs)))
				xd_type = integers[1];
		case 0: break;
		default:printk("xd: too many parameters for xd\n");
	}
	xd_maxsectors = 0x01;
}

/* xd_setparam: set the drive characteristics */
static void __init xd_setparam (u_char command,u_char drive,u_char heads,u_short cylinders,u_short rwrite,u_short wprecomp,u_char ecc)
{
	u_char cmdblk[14];

	xd_build(cmdblk,command,drive,0,0,0,0,0);
	cmdblk[6] = (u_char) (cylinders >> 8) & 0x03;
	cmdblk[7] = (u_char) (cylinders & 0xFF);
	cmdblk[8] = heads & 0x1F;
	cmdblk[9] = (u_char) (rwrite >> 8) & 0x03;
	cmdblk[10] = (u_char) (rwrite & 0xFF);
	cmdblk[11] = (u_char) (wprecomp >> 8) & 0x03;
	cmdblk[12] = (u_char) (wprecomp & 0xFF);
	cmdblk[13] = ecc;

	/* Some controllers require geometry info as data, not command */

	if (xd_command(cmdblk,PIO_MODE,NULL,&cmdblk[6],NULL,XD_TIMEOUT * 2))
		printk("xd: error setting characteristics for xd%c\n", 'a'+drive);
}


#ifdef MODULE

module_param_array(xd, int, NULL, 0);
module_param_array(xd_geo, int, NULL, 0);
module_param(nodma, bool, 0);

MODULE_LICENSE("GPL");

void cleanup_module(void)
{
	int i;
	unregister_blkdev(XT_DISK_MAJOR, "xd");
	for (i = 0; i < xd_drives; i++) {
		del_gendisk(xd_gendisk[i]);
		put_disk(xd_gendisk[i]);
	}
	blk_cleanup_queue(xd_queue);
	release_region(xd_iobase,4);
	if (xd_drives) {
		free_irq(xd_irq, NULL);
		free_dma(xd_dma);
		if (xd_dma_buffer)
			xd_dma_mem_free((unsigned long)xd_dma_buffer, xd_maxsectors * 0x200);
	}
}
#else

static int __init xd_setup (char *str)
{
	int ints[5];
	get_options (str, ARRAY_SIZE (ints), ints);
	do_xd_setup (ints);
	return 1;
}

/* xd_manual_geo_init: initialise drive geometry from command line parameters
   (used only for WD drives) */
static int __init xd_manual_geo_init (char *str)
{
	int i, integers[1 + 3*XD_MAXDRIVES];

	get_options (str, ARRAY_SIZE (integers), integers);
	if (integers[0]%3 != 0) {
		printk("xd: incorrect number of parameters for xd_geo\n");
		return 1;
	}
	for (i = 0; (i < integers[0]) && (i < 3*XD_MAXDRIVES); i++)
		xd_geo[i] = integers[i+1];
	return 1;
}

__setup ("xd=", xd_setup);
__setup ("xd_geo=", xd_manual_geo_init);

#endif /* MODULE */

module_init(xd_init);
MODULE_ALIAS_BLOCKDEV_MAJOR(XT_DISK_MAJOR);