forked from microsoft/WSL2-Linux-Kernel
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathide-floppy.c
2225 lines (1962 loc) · 66.7 KB
/
ide-floppy.c
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
/*
* linux/drivers/ide/ide-floppy.c Version 0.99 Feb 24 2002
*
* Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il>
* Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net>
*/
/*
* IDE ATAPI floppy driver.
*
* The driver currently doesn't have any fancy features, just the bare
* minimum read/write support.
*
* This driver supports the following IDE floppy drives:
*
* LS-120/240 SuperDisk
* Iomega Zip 100/250
* Iomega PC Card Clik!/PocketZip
*
* Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many
* ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive.
*
* Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c.
* Ver 0.2 Oct 31 96 Minor changes.
* Ver 0.3 Dec 2 96 Fixed error recovery bug.
* Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl.
* Ver 0.5 Feb 21 97 Add partitions support.
* Use the minimum of the LBA and CHS capacities.
* Avoid hwgroup->rq == NULL on the last irq.
* Fix potential null dereferencing with DEBUG_LOG.
* Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds.
* Add media write-protect detection.
* Issue START command only if TEST UNIT READY fails.
* Add work-around for IOMEGA ZIP revision 21.D.
* Remove idefloppy_get_capabilities().
* Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of
* bytes requested on each interrupt to be zero.
* Thanks to <shanos@es.co.nz> for pointing this out.
* Ver 0.9.sv Jan 6 01 Sam Varshavchik <mrsam@courier-mta.com>
* Implement low level formatting. Reimplemented
* IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp
* bit. My LS-120 drive barfs on
* IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me.
* Compromise by not reporting a failure to get this
* mode page. Implemented four IOCTLs in order to
* implement formatting. IOCTls begin with 0x4600,
* 0x46 is 'F' as in Format.
* Jan 9 01 Userland option to select format verify.
* Added PC_SUPPRESS_ERROR flag - some idefloppy drives
* do not implement IDEFLOPPY_CAPABILITIES_PAGE, and
* return a sense error. Suppress error reporting in
* this particular case in order to avoid spurious
* errors in syslog. The culprit is
* idefloppy_get_capability_page(), so move it to
* idefloppy_begin_format() so that it's not used
* unless absolutely necessary.
* If drive does not support format progress indication
* monitor the dsc bit in the status register.
* Also, O_NDELAY on open will allow the device to be
* opened without a disk available. This can be used to
* open an unformatted disk, or get the device capacity.
* Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by
* <paul@paulbristow.net>
* Ver 0.92 Oct 22 00 Paul Bristow became official maintainer for this
* driver. Included Powerbook internal zip kludge.
* Ver 0.93 Oct 24 00 Fixed bugs for Clik! drive
* no disk on insert and disk change now works
* Ver 0.94 Oct 27 00 Tidied up to remove strstr(Clik) everywhere
* Ver 0.95 Nov 7 00 Brought across to kernel 2.4
* Ver 0.96 Jan 7 01 Actually in line with release version of 2.4.0
* including set_bit patch from Rusty Russell
* Ver 0.97 Jul 22 01 Merge 0.91-0.96 onto 0.9.sv for ac series
* Ver 0.97.sv Aug 3 01 Backported from 2.4.7-ac3
* Ver 0.98 Oct 26 01 Split idefloppy_transfer_pc into two pieces to
* fix a lost interrupt problem. It appears the busy
* bit was being deasserted by my IOMEGA ATAPI ZIP 100
* drive before the drive was actually ready.
* Ver 0.98a Oct 29 01 Expose delay value so we can play.
* Ver 0.99 Feb 24 02 Remove duplicate code, modify clik! detection code
* to support new PocketZip drives
*/
#define IDEFLOPPY_VERSION "0.99.newide"
#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/major.h>
#include <linux/errno.h>
#include <linux/genhd.h>
#include <linux/slab.h>
#include <linux/cdrom.h>
#include <linux/ide.h>
#include <linux/bitops.h>
#include <linux/mutex.h>
#include <scsi/scsi_ioctl.h>
#include <asm/byteorder.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/unaligned.h>
/*
* The following are used to debug the driver.
*/
#define IDEFLOPPY_DEBUG_LOG 0
#define IDEFLOPPY_DEBUG_INFO 0
#define IDEFLOPPY_DEBUG_BUGS 1
/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
#define IDEFLOPPY_DEBUG( fmt, args... )
#if IDEFLOPPY_DEBUG_LOG
#define debug_log printk
#else
#define debug_log(fmt, args... ) do {} while(0)
#endif
/*
* Some drives require a longer irq timeout.
*/
#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
/*
* After each failed packet command we issue a request sense command
* and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
*/
#define IDEFLOPPY_MAX_PC_RETRIES 3
/*
* With each packet command, we allocate a buffer of
* IDEFLOPPY_PC_BUFFER_SIZE bytes.
*/
#define IDEFLOPPY_PC_BUFFER_SIZE 256
/*
* In various places in the driver, we need to allocate storage
* for packet commands and requests, which will remain valid while
* we leave the driver to wait for an interrupt or a timeout event.
*/
#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
/*
* Our view of a packet command.
*/
typedef struct idefloppy_packet_command_s {
u8 c[12]; /* Actual packet bytes */
int retries; /* On each retry, we increment retries */
int error; /* Error code */
int request_transfer; /* Bytes to transfer */
int actually_transferred; /* Bytes actually transferred */
int buffer_size; /* Size of our data buffer */
int b_count; /* Missing/Available data on the current buffer */
struct request *rq; /* The corresponding request */
u8 *buffer; /* Data buffer */
u8 *current_position; /* Pointer into the above buffer */
void (*callback) (ide_drive_t *); /* Called when this packet command is completed */
u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
unsigned long flags; /* Status/Action bit flags: long for set_bit */
} idefloppy_pc_t;
/*
* Packet command flag bits.
*/
#define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */
#define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */
#define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */
#define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */
#define PC_WRITING 5 /* Data direction */
#define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */
/*
* Removable Block Access Capabilities Page
*/
typedef struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned page_code :6; /* Page code - Should be 0x1b */
unsigned reserved1_6 :1; /* Reserved */
unsigned ps :1; /* Should be 0 */
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned ps :1; /* Should be 0 */
unsigned reserved1_6 :1; /* Reserved */
unsigned page_code :6; /* Page code - Should be 0x1b */
#else
#error "Bitfield endianness not defined! Check your byteorder.h"
#endif
u8 page_length; /* Page Length - Should be 0xa */
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned reserved2 :6;
unsigned srfp :1; /* Supports reporting progress of format */
unsigned sflp :1; /* System floppy type device */
unsigned tlun :3; /* Total logical units supported by the device */
unsigned reserved3 :3;
unsigned sml :1; /* Single / Multiple lun supported */
unsigned ncd :1; /* Non cd optical device */
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned sflp :1; /* System floppy type device */
unsigned srfp :1; /* Supports reporting progress of format */
unsigned reserved2 :6;
unsigned ncd :1; /* Non cd optical device */
unsigned sml :1; /* Single / Multiple lun supported */
unsigned reserved3 :3;
unsigned tlun :3; /* Total logical units supported by the device */
#else
#error "Bitfield endianness not defined! Check your byteorder.h"
#endif
u8 reserved[8];
} idefloppy_capabilities_page_t;
/*
* Flexible disk page.
*/
typedef struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned page_code :6; /* Page code - Should be 0x5 */
unsigned reserved1_6 :1; /* Reserved */
unsigned ps :1; /* The device is capable of saving the page */
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned ps :1; /* The device is capable of saving the page */
unsigned reserved1_6 :1; /* Reserved */
unsigned page_code :6; /* Page code - Should be 0x5 */
#else
#error "Bitfield endianness not defined! Check your byteorder.h"
#endif
u8 page_length; /* Page Length - Should be 0x1e */
u16 transfer_rate; /* In kilobits per second */
u8 heads, sectors; /* Number of heads, Number of sectors per track */
u16 sector_size; /* Byes per sector */
u16 cyls; /* Number of cylinders */
u8 reserved10[10];
u8 motor_delay; /* Motor off delay */
u8 reserved21[7];
u16 rpm; /* Rotations per minute */
u8 reserved30[2];
} idefloppy_flexible_disk_page_t;
/*
* Format capacity
*/
typedef struct {
u8 reserved[3];
u8 length; /* Length of the following descriptors in bytes */
} idefloppy_capacity_header_t;
typedef struct {
u32 blocks; /* Number of blocks */
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned dc :2; /* Descriptor Code */
unsigned reserved :6;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned reserved :6;
unsigned dc :2; /* Descriptor Code */
#else
#error "Bitfield endianness not defined! Check your byteorder.h"
#endif
u8 length_msb; /* Block Length (MSB)*/
u16 length; /* Block Length */
} idefloppy_capacity_descriptor_t;
#define CAPACITY_INVALID 0x00
#define CAPACITY_UNFORMATTED 0x01
#define CAPACITY_CURRENT 0x02
#define CAPACITY_NO_CARTRIDGE 0x03
/*
* Most of our global data which we need to save even as we leave the
* driver due to an interrupt or a timer event is stored in a variable
* of type idefloppy_floppy_t, defined below.
*/
typedef struct ide_floppy_obj {
ide_drive_t *drive;
ide_driver_t *driver;
struct gendisk *disk;
struct kref kref;
unsigned int openers; /* protected by BKL for now */
/* Current packet command */
idefloppy_pc_t *pc;
/* Last failed packet command */
idefloppy_pc_t *failed_pc;
/* Packet command stack */
idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
/* Next free packet command storage space */
int pc_stack_index;
struct request rq_stack[IDEFLOPPY_PC_STACK];
/* We implement a circular array */
int rq_stack_index;
/*
* Last error information
*/
u8 sense_key, asc, ascq;
/* delay this long before sending packet command */
u8 ticks;
int progress_indication;
/*
* Device information
*/
/* Current format */
int blocks, block_size, bs_factor;
/* Last format capacity */
idefloppy_capacity_descriptor_t capacity;
/* Copy of the flexible disk page */
idefloppy_flexible_disk_page_t flexible_disk_page;
/* Write protect */
int wp;
/* Supports format progress report */
int srfp;
/* Status/Action flags */
unsigned long flags;
} idefloppy_floppy_t;
#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
/*
* Floppy flag bits values.
*/
#define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */
#define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */
#define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */
#define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */
#define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */
#define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */
/*
* ATAPI floppy drive packet commands
*/
#define IDEFLOPPY_FORMAT_UNIT_CMD 0x04
#define IDEFLOPPY_INQUIRY_CMD 0x12
#define IDEFLOPPY_MODE_SELECT_CMD 0x55
#define IDEFLOPPY_MODE_SENSE_CMD 0x5a
#define IDEFLOPPY_READ10_CMD 0x28
#define IDEFLOPPY_READ12_CMD 0xa8
#define IDEFLOPPY_READ_CAPACITY_CMD 0x23
#define IDEFLOPPY_REQUEST_SENSE_CMD 0x03
#define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e
#define IDEFLOPPY_SEEK_CMD 0x2b
#define IDEFLOPPY_START_STOP_CMD 0x1b
#define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00
#define IDEFLOPPY_VERIFY_CMD 0x2f
#define IDEFLOPPY_WRITE10_CMD 0x2a
#define IDEFLOPPY_WRITE12_CMD 0xaa
#define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e
/*
* Defines for the mode sense command
*/
#define MODE_SENSE_CURRENT 0x00
#define MODE_SENSE_CHANGEABLE 0x01
#define MODE_SENSE_DEFAULT 0x02
#define MODE_SENSE_SAVED 0x03
/*
* IOCTLs used in low-level formatting.
*/
#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600
#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601
#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602
#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603
#if 0
/*
* Special requests for our block device strategy routine.
*/
#define IDEFLOPPY_FIRST_RQ 90
/*
* IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue.
*/
#define IDEFLOPPY_PC_RQ 90
#define IDEFLOPPY_LAST_RQ 90
/*
* A macro which can be used to check if a given request command
* originated in the driver or in the buffer cache layer.
*/
#define IDEFLOPPY_RQ_CMD(cmd) ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ))
#endif
/*
* Error codes which are returned in rq->errors to the higher part
* of the driver.
*/
#define IDEFLOPPY_ERROR_GENERAL 101
/*
* The following is used to format the general configuration word of
* the ATAPI IDENTIFY DEVICE command.
*/
struct idefloppy_id_gcw {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned packet_size :2; /* Packet Size */
unsigned reserved234 :3; /* Reserved */
unsigned drq_type :2; /* Command packet DRQ type */
unsigned removable :1; /* Removable media */
unsigned device_type :5; /* Device type */
unsigned reserved13 :1; /* Reserved */
unsigned protocol :2; /* Protocol type */
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned protocol :2; /* Protocol type */
unsigned reserved13 :1; /* Reserved */
unsigned device_type :5; /* Device type */
unsigned removable :1; /* Removable media */
unsigned drq_type :2; /* Command packet DRQ type */
unsigned reserved234 :3; /* Reserved */
unsigned packet_size :2; /* Packet Size */
#else
#error "Bitfield endianness not defined! Check your byteorder.h"
#endif
};
/*
* INQUIRY packet command - Data Format
*/
typedef struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned device_type :5; /* Peripheral Device Type */
unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
unsigned reserved1_6t0 :7; /* Reserved */
unsigned rmb :1; /* Removable Medium Bit */
unsigned ansi_version :3; /* ANSI Version */
unsigned ecma_version :3; /* ECMA Version */
unsigned iso_version :2; /* ISO Version */
unsigned response_format :4; /* Response Data Format */
unsigned reserved3_45 :2; /* Reserved */
unsigned reserved3_6 :1; /* TrmIOP - Reserved */
unsigned reserved3_7 :1; /* AENC - Reserved */
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
unsigned device_type :5; /* Peripheral Device Type */
unsigned rmb :1; /* Removable Medium Bit */
unsigned reserved1_6t0 :7; /* Reserved */
unsigned iso_version :2; /* ISO Version */
unsigned ecma_version :3; /* ECMA Version */
unsigned ansi_version :3; /* ANSI Version */
unsigned reserved3_7 :1; /* AENC - Reserved */
unsigned reserved3_6 :1; /* TrmIOP - Reserved */
unsigned reserved3_45 :2; /* Reserved */
unsigned response_format :4; /* Response Data Format */
#else
#error "Bitfield endianness not defined! Check your byteorder.h"
#endif
u8 additional_length; /* Additional Length (total_length-4) */
u8 rsv5, rsv6, rsv7; /* Reserved */
u8 vendor_id[8]; /* Vendor Identification */
u8 product_id[16]; /* Product Identification */
u8 revision_level[4]; /* Revision Level */
u8 vendor_specific[20]; /* Vendor Specific - Optional */
u8 reserved56t95[40]; /* Reserved - Optional */
/* Additional information may be returned */
} idefloppy_inquiry_result_t;
/*
* REQUEST SENSE packet command result - Data Format.
*/
typedef struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned error_code :7; /* Current error (0x70) */
unsigned valid :1; /* The information field conforms to SFF-8070i */
u8 reserved1 :8; /* Reserved */
unsigned sense_key :4; /* Sense Key */
unsigned reserved2_4 :1; /* Reserved */
unsigned ili :1; /* Incorrect Length Indicator */
unsigned reserved2_67 :2;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned valid :1; /* The information field conforms to SFF-8070i */
unsigned error_code :7; /* Current error (0x70) */
u8 reserved1 :8; /* Reserved */
unsigned reserved2_67 :2;
unsigned ili :1; /* Incorrect Length Indicator */
unsigned reserved2_4 :1; /* Reserved */
unsigned sense_key :4; /* Sense Key */
#else
#error "Bitfield endianness not defined! Check your byteorder.h"
#endif
u32 information __attribute__ ((packed));
u8 asl; /* Additional sense length (n-7) */
u32 command_specific; /* Additional command specific information */
u8 asc; /* Additional Sense Code */
u8 ascq; /* Additional Sense Code Qualifier */
u8 replaceable_unit_code; /* Field Replaceable Unit Code */
u8 sksv[3];
u8 pad[2]; /* Padding to 20 bytes */
} idefloppy_request_sense_result_t;
/*
* Pages of the SELECT SENSE / MODE SENSE packet commands.
*/
#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b
#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05
/*
* Mode Parameter Header for the MODE SENSE packet command
*/
typedef struct {
u16 mode_data_length; /* Length of the following data transfer */
u8 medium_type; /* Medium Type */
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned reserved3 :7;
unsigned wp :1; /* Write protect */
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned wp :1; /* Write protect */
unsigned reserved3 :7;
#else
#error "Bitfield endianness not defined! Check your byteorder.h"
#endif
u8 reserved[4];
} idefloppy_mode_parameter_header_t;
static DEFINE_MUTEX(idefloppy_ref_mutex);
#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
#define ide_floppy_g(disk) \
container_of((disk)->private_data, struct ide_floppy_obj, driver)
static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
{
struct ide_floppy_obj *floppy = NULL;
mutex_lock(&idefloppy_ref_mutex);
floppy = ide_floppy_g(disk);
if (floppy)
kref_get(&floppy->kref);
mutex_unlock(&idefloppy_ref_mutex);
return floppy;
}
static void ide_floppy_release(struct kref *);
static void ide_floppy_put(struct ide_floppy_obj *floppy)
{
mutex_lock(&idefloppy_ref_mutex);
kref_put(&floppy->kref, ide_floppy_release);
mutex_unlock(&idefloppy_ref_mutex);
}
/*
* Too bad. The drive wants to send us data which we are not ready to accept.
* Just throw it away.
*/
static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
{
while (bcount--)
(void) HWIF(drive)->INB(IDE_DATA_REG);
}
#if IDEFLOPPY_DEBUG_BUGS
static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
{
while (bcount--)
HWIF(drive)->OUTB(0, IDE_DATA_REG);
}
#endif /* IDEFLOPPY_DEBUG_BUGS */
/*
* idefloppy_do_end_request is used to finish servicing a request.
*
* For read/write requests, we will call ide_end_request to pass to the
* next buffer.
*/
static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
{
idefloppy_floppy_t *floppy = drive->driver_data;
struct request *rq = HWGROUP(drive)->rq;
int error;
debug_log(KERN_INFO "Reached idefloppy_end_request\n");
switch (uptodate) {
case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
case 1: error = 0; break;
default: error = uptodate;
}
if (error)
floppy->failed_pc = NULL;
/* Why does this happen? */
if (!rq)
return 0;
if (!blk_special_request(rq)) {
/* our real local end request function */
ide_end_request(drive, uptodate, nsecs);
return 0;
}
rq->errors = error;
/* fixme: need to move this local also */
ide_end_drive_cmd(drive, 0, 0);
return 0;
}
static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
{
struct request *rq = pc->rq;
struct bio_vec *bvec;
struct bio *bio;
unsigned long flags;
char *data;
int count, i, done = 0;
rq_for_each_bio(bio, rq) {
bio_for_each_segment(bvec, bio, i) {
if (!bcount)
break;
count = min(bvec->bv_len, bcount);
data = bvec_kmap_irq(bvec, &flags);
drive->hwif->atapi_input_bytes(drive, data, count);
bvec_kunmap_irq(data, &flags);
bcount -= count;
pc->b_count += count;
done += count;
}
}
idefloppy_do_end_request(drive, 1, done >> 9);
if (bcount) {
printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
idefloppy_discard_data(drive, bcount);
}
}
static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
{
struct request *rq = pc->rq;
struct bio *bio;
struct bio_vec *bvec;
unsigned long flags;
int count, i, done = 0;
char *data;
rq_for_each_bio(bio, rq) {
bio_for_each_segment(bvec, bio, i) {
if (!bcount)
break;
count = min(bvec->bv_len, bcount);
data = bvec_kmap_irq(bvec, &flags);
drive->hwif->atapi_output_bytes(drive, data, count);
bvec_kunmap_irq(data, &flags);
bcount -= count;
pc->b_count += count;
done += count;
}
}
idefloppy_do_end_request(drive, 1, done >> 9);
#if IDEFLOPPY_DEBUG_BUGS
if (bcount) {
printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
idefloppy_write_zeros(drive, bcount);
}
#endif
}
static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
{
struct request *rq = pc->rq;
struct bio *bio = rq->bio;
while ((bio = rq->bio) != NULL)
idefloppy_do_end_request(drive, 1, 0);
}
/*
* idefloppy_queue_pc_head generates a new packet command request in front
* of the request queue, before the current request, so that it will be
* processed immediately, on the next pass through the driver.
*/
static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
{
struct ide_floppy_obj *floppy = drive->driver_data;
ide_init_drive_cmd(rq);
rq->buffer = (char *) pc;
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->rq_disk = floppy->disk;
(void) ide_do_drive_cmd(drive, rq, ide_preempt);
}
static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
floppy->pc_stack_index=0;
return (&floppy->pc_stack[floppy->pc_stack_index++]);
}
static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
floppy->rq_stack_index = 0;
return (&floppy->rq_stack[floppy->rq_stack_index++]);
}
/*
* idefloppy_analyze_error is called on each failed packet command retry
* to analyze the request sense.
*/
static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
{
idefloppy_floppy_t *floppy = drive->driver_data;
floppy->sense_key = result->sense_key;
floppy->asc = result->asc;
floppy->ascq = result->ascq;
floppy->progress_indication = result->sksv[0] & 0x80 ?
(u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
if (floppy->failed_pc)
debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
"asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
result->sense_key, result->asc, result->ascq);
else
debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
"ascq = %x\n", result->sense_key,
result->asc, result->ascq);
}
static void idefloppy_request_sense_callback (ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
if (!floppy->pc->error) {
idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
idefloppy_do_end_request(drive, 1, 0);
} else {
printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
idefloppy_do_end_request(drive, 0, 0);
}
}
/*
* General packet command callback function.
*/
static void idefloppy_pc_callback (ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
}
/*
* idefloppy_init_pc initializes a packet command.
*/
static void idefloppy_init_pc (idefloppy_pc_t *pc)
{
memset(pc->c, 0, 12);
pc->retries = 0;
pc->flags = 0;
pc->request_transfer = 0;
pc->buffer = pc->pc_buffer;
pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
pc->callback = &idefloppy_pc_callback;
}
static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
{
idefloppy_init_pc(pc);
pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
pc->c[4] = 255;
pc->request_transfer = 18;
pc->callback = &idefloppy_request_sense_callback;
}
/*
* idefloppy_retry_pc is called when an error was detected during the
* last packet command. We queue a request sense packet command in
* the head of the request list.
*/
static void idefloppy_retry_pc (ide_drive_t *drive)
{
idefloppy_pc_t *pc;
struct request *rq;
atapi_error_t error;
error.all = HWIF(drive)->INB(IDE_ERROR_REG);
pc = idefloppy_next_pc_storage(drive);
rq = idefloppy_next_rq_storage(drive);
idefloppy_create_request_sense_cmd(pc);
idefloppy_queue_pc_head(drive, pc, rq);
}
/*
* idefloppy_pc_intr is the usual interrupt handler which will be called
* during a packet command.
*/
static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
atapi_status_t status;
atapi_bcount_t bcount;
atapi_ireason_t ireason;
idefloppy_pc_t *pc = floppy->pc;
struct request *rq = pc->rq;
unsigned int temp;
debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
__FUNCTION__);
if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
if (HWIF(drive)->ide_dma_end(drive)) {
set_bit(PC_DMA_ERROR, &pc->flags);
} else {
pc->actually_transferred = pc->request_transfer;
idefloppy_update_buffers(drive, pc);
}
debug_log(KERN_INFO "ide-floppy: DMA finished\n");
}
/* Clear the interrupt */
status.all = HWIF(drive)->INB(IDE_STATUS_REG);
if (!status.b.drq) { /* No more interrupts */
debug_log(KERN_INFO "Packet command completed, %d bytes "
"transferred\n", pc->actually_transferred);
clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
local_irq_enable_in_hardirq();
if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
/* Error detected */
debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
drive->name);
rq->errors++;
if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
printk(KERN_ERR "ide-floppy: I/O error in "
"request sense command\n");
return ide_do_reset(drive);
}
/* Retry operation */
idefloppy_retry_pc(drive);
/* queued, but not started */
return ide_stopped;
}
pc->error = 0;
if (floppy->failed_pc == pc)
floppy->failed_pc = NULL;
/* Command finished - Call the callback function */
pc->callback(drive);
return ide_stopped;
}
if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
printk(KERN_ERR "ide-floppy: The floppy wants to issue "
"more interrupts in DMA mode\n");
ide_dma_off(drive);
return ide_do_reset(drive);
}
/* Get the number of bytes to transfer */
bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
/* on this interrupt */
ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
if (ireason.b.cod) {
printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
return ide_do_reset(drive);
}
if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
/* Hopefully, we will never get here */
printk(KERN_ERR "ide-floppy: We wanted to %s, ",
ireason.b.io ? "Write":"Read");
printk(KERN_ERR "but the floppy wants us to %s !\n",
ireason.b.io ? "Read":"Write");
return ide_do_reset(drive);
}
if (!test_bit(PC_WRITING, &pc->flags)) {
/* Reading - Check that we have enough space */
temp = pc->actually_transferred + bcount.all;
if (temp > pc->request_transfer) {
if (temp > pc->buffer_size) {
printk(KERN_ERR "ide-floppy: The floppy wants "
"to send us more data than expected "
"- discarding data\n");
idefloppy_discard_data(drive,bcount.all);
BUG_ON(HWGROUP(drive)->handler != NULL);
ide_set_handler(drive,
&idefloppy_pc_intr,
IDEFLOPPY_WAIT_CMD,
NULL);
return ide_started;
}
debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
"send us more data than expected - "
"allowing transfer\n");
}
}
if (test_bit(PC_WRITING, &pc->flags)) {
if (pc->buffer != NULL)
/* Write the current buffer */
HWIF(drive)->atapi_output_bytes(drive,
pc->current_position,
bcount.all);
else
idefloppy_output_buffers(drive, pc, bcount.all);
} else {
if (pc->buffer != NULL)
/* Read the current buffer */
HWIF(drive)->atapi_input_bytes(drive,
pc->current_position,
bcount.all);
else
idefloppy_input_buffers(drive, pc, bcount.all);
}
/* Update the current position */
pc->actually_transferred += bcount.all;
pc->current_position += bcount.all;
BUG_ON(HWGROUP(drive)->handler != NULL);
ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */
return ide_started;
}
/*
* This is the original routine that did the packet transfer.
* It fails at high speeds on the Iomega ZIP drive, so there's a slower version
* for that drive below. The algorithm is chosen based on drive type
*/
static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
{
ide_startstop_t startstop;
idefloppy_floppy_t *floppy = drive->driver_data;
atapi_ireason_t ireason;
if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
printk(KERN_ERR "ide-floppy: Strange, packet command "
"initiated yet DRQ isn't asserted\n");
return startstop;
}
ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
if (!ireason.b.cod || ireason.b.io) {
printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
"issuing a packet command\n");
return ide_do_reset(drive);
}
BUG_ON(HWGROUP(drive)->handler != NULL);
/* Set the interrupt routine */
ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
/* Send the actual packet */
HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
return ide_started;
}
/*
* What we have here is a classic case of a top half / bottom half
* interrupt service routine. In interrupt mode, the device sends
* an interrupt to signal it's ready to receive a packet. However,
* we need to delay about 2-3 ticks before issuing the packet or we
* gets in trouble.
*
* So, follow carefully. transfer_pc1 is called as an interrupt (or
* directly). In either case, when the device says it's ready for a
* packet, we schedule the packet transfer to occur about 2-3 ticks
* later in transfer_pc2.
*/
static int idefloppy_transfer_pc2 (ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
/* Send the actual packet */
HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
/* Timeout for the packet command */
return IDEFLOPPY_WAIT_CMD;
}
static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
ide_startstop_t startstop;
atapi_ireason_t ireason;
if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {