Fixup rq_for_each_segment() indentation
[linux-2.6.git] / drivers / ide / ide-floppy.c
1 /*
2  * linux/drivers/ide/ide-floppy.c       Version 0.99    Feb 24 2002
3  *
4  * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il>
5  * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net>
6  */
7
8 /*
9  * IDE ATAPI floppy driver.
10  *
11  * The driver currently doesn't have any fancy features, just the bare
12  * minimum read/write support.
13  *
14  * This driver supports the following IDE floppy drives:
15  *
16  * LS-120/240 SuperDisk
17  * Iomega Zip 100/250
18  * Iomega PC Card Clik!/PocketZip
19  *
20  * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many
21  * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive.
22  *
23  * Ver 0.1   Oct 17 96   Initial test version, mostly based on ide-tape.c.
24  * Ver 0.2   Oct 31 96   Minor changes.
25  * Ver 0.3   Dec  2 96   Fixed error recovery bug.
26  * Ver 0.4   Jan 26 97   Add support for the HDIO_GETGEO ioctl.
27  * Ver 0.5   Feb 21 97   Add partitions support.
28  *                       Use the minimum of the LBA and CHS capacities.
29  *                       Avoid hwgroup->rq == NULL on the last irq.
30  *                       Fix potential null dereferencing with DEBUG_LOG.
31  * Ver 0.8   Dec  7 97   Increase irq timeout from 10 to 50 seconds.
32  *                       Add media write-protect detection.
33  *                       Issue START command only if TEST UNIT READY fails.
34  *                       Add work-around for IOMEGA ZIP revision 21.D.
35  *                       Remove idefloppy_get_capabilities().
36  * Ver 0.9   Jul  4 99   Fix a bug which might have caused the number of
37  *                        bytes requested on each interrupt to be zero.
38  *                        Thanks to <shanos@es.co.nz> for pointing this out.
39  * Ver 0.9.sv Jan 6 01   Sam Varshavchik <mrsam@courier-mta.com>
40  *                       Implement low level formatting.  Reimplemented
41  *                       IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp
42  *                       bit.  My LS-120 drive barfs on
43  *                       IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me.
44  *                       Compromise by not reporting a failure to get this
45  *                       mode page.  Implemented four IOCTLs in order to
46  *                       implement formatting.  IOCTls begin with 0x4600,
47  *                       0x46 is 'F' as in Format.
48  *            Jan 9 01   Userland option to select format verify.
49  *                       Added PC_SUPPRESS_ERROR flag - some idefloppy drives
50  *                       do not implement IDEFLOPPY_CAPABILITIES_PAGE, and
51  *                       return a sense error.  Suppress error reporting in
52  *                       this particular case in order to avoid spurious
53  *                       errors in syslog.  The culprit is
54  *                       idefloppy_get_capability_page(), so move it to
55  *                       idefloppy_begin_format() so that it's not used
56  *                       unless absolutely necessary.
57  *                       If drive does not support format progress indication
58  *                       monitor the dsc bit in the status register.
59  *                       Also, O_NDELAY on open will allow the device to be
60  *                       opened without a disk available.  This can be used to
61  *                       open an unformatted disk, or get the device capacity.
62  * Ver 0.91  Dec 11 99   Added IOMEGA Clik! drive support by 
63  *                 <paul@paulbristow.net>
64  * Ver 0.92  Oct 22 00   Paul Bristow became official maintainer for this 
65  *                         driver.  Included Powerbook internal zip kludge.
66  * Ver 0.93  Oct 24 00   Fixed bugs for Clik! drive
67  *                        no disk on insert and disk change now works
68  * Ver 0.94  Oct 27 00   Tidied up to remove strstr(Clik) everywhere
69  * Ver 0.95  Nov  7 00   Brought across to kernel 2.4
70  * Ver 0.96  Jan  7 01   Actually in line with release version of 2.4.0
71  *                       including set_bit patch from Rusty Russell
72  * Ver 0.97  Jul 22 01   Merge 0.91-0.96 onto 0.9.sv for ac series
73  * Ver 0.97.sv Aug 3 01  Backported from 2.4.7-ac3
74  * Ver 0.98  Oct 26 01   Split idefloppy_transfer_pc into two pieces to
75  *                        fix a lost interrupt problem. It appears the busy
76  *                        bit was being deasserted by my IOMEGA ATAPI ZIP 100
77  *                        drive before the drive was actually ready.
78  * Ver 0.98a Oct 29 01   Expose delay value so we can play.
79  * Ver 0.99  Feb 24 02   Remove duplicate code, modify clik! detection code 
80  *                        to support new PocketZip drives 
81  */
82
83 #define IDEFLOPPY_VERSION "0.99.newide"
84
85 #include <linux/module.h>
86 #include <linux/types.h>
87 #include <linux/string.h>
88 #include <linux/kernel.h>
89 #include <linux/delay.h>
90 #include <linux/timer.h>
91 #include <linux/mm.h>
92 #include <linux/interrupt.h>
93 #include <linux/major.h>
94 #include <linux/errno.h>
95 #include <linux/genhd.h>
96 #include <linux/slab.h>
97 #include <linux/cdrom.h>
98 #include <linux/ide.h>
99 #include <linux/bitops.h>
100 #include <linux/mutex.h>
101
102 #include <scsi/scsi_ioctl.h>
103
104 #include <asm/byteorder.h>
105 #include <asm/irq.h>
106 #include <asm/uaccess.h>
107 #include <asm/io.h>
108 #include <asm/unaligned.h>
109
110 /*
111  *      The following are used to debug the driver.
112  */
113 #define IDEFLOPPY_DEBUG_LOG             0
114 #define IDEFLOPPY_DEBUG_INFO            0
115 #define IDEFLOPPY_DEBUG_BUGS            1
116
117 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
118 #define IDEFLOPPY_DEBUG( fmt, args... )
119
120 #if IDEFLOPPY_DEBUG_LOG
121 #define debug_log printk
122 #else
123 #define debug_log(fmt, args... ) do {} while(0)
124 #endif
125
126
127 /*
128  *      Some drives require a longer irq timeout.
129  */
130 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
131
132 /*
133  *      After each failed packet command we issue a request sense command
134  *      and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
135  */
136 #define IDEFLOPPY_MAX_PC_RETRIES        3
137
138 /*
139  *      With each packet command, we allocate a buffer of
140  *      IDEFLOPPY_PC_BUFFER_SIZE bytes.
141  */
142 #define IDEFLOPPY_PC_BUFFER_SIZE        256
143
144 /*
145  *      In various places in the driver, we need to allocate storage
146  *      for packet commands and requests, which will remain valid while
147  *      we leave the driver to wait for an interrupt or a timeout event.
148  */
149 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
150
151 /*
152  *      Our view of a packet command.
153  */
154 typedef struct idefloppy_packet_command_s {
155         u8 c[12];                               /* Actual packet bytes */
156         int retries;                            /* On each retry, we increment retries */
157         int error;                              /* Error code */
158         int request_transfer;                   /* Bytes to transfer */
159         int actually_transferred;               /* Bytes actually transferred */
160         int buffer_size;                        /* Size of our data buffer */
161         int b_count;                            /* Missing/Available data on the current buffer */
162         struct request *rq;                     /* The corresponding request */
163         u8 *buffer;                             /* Data buffer */
164         u8 *current_position;                   /* Pointer into the above buffer */
165         void (*callback) (ide_drive_t *);       /* Called when this packet command is completed */
166         u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
167         unsigned long flags;                    /* Status/Action bit flags: long for set_bit */
168 } idefloppy_pc_t;
169
170 /*
171  *      Packet command flag bits.
172  */
173 #define PC_ABORT                        0       /* Set when an error is considered normal - We won't retry */
174 #define PC_DMA_RECOMMENDED              2       /* 1 when we prefer to use DMA if possible */
175 #define PC_DMA_IN_PROGRESS              3       /* 1 while DMA in progress */
176 #define PC_DMA_ERROR                    4       /* 1 when encountered problem during DMA */
177 #define PC_WRITING                      5       /* Data direction */
178
179 #define PC_SUPPRESS_ERROR               6       /* Suppress error reporting */
180
181 /*
182  *      Removable Block Access Capabilities Page
183  */
184 typedef struct {
185 #if defined(__LITTLE_ENDIAN_BITFIELD)
186         unsigned        page_code       :6;     /* Page code - Should be 0x1b */
187         unsigned        reserved1_6     :1;     /* Reserved */
188         unsigned        ps              :1;     /* Should be 0 */
189 #elif defined(__BIG_ENDIAN_BITFIELD)
190         unsigned        ps              :1;     /* Should be 0 */
191         unsigned        reserved1_6     :1;     /* Reserved */
192         unsigned        page_code       :6;     /* Page code - Should be 0x1b */
193 #else
194 #error "Bitfield endianness not defined! Check your byteorder.h"
195 #endif
196         u8              page_length;            /* Page Length - Should be 0xa */
197 #if defined(__LITTLE_ENDIAN_BITFIELD)
198         unsigned        reserved2       :6;
199         unsigned        srfp            :1;     /* Supports reporting progress of format */
200         unsigned        sflp            :1;     /* System floppy type device */
201         unsigned        tlun            :3;     /* Total logical units supported by the device */
202         unsigned        reserved3       :3;
203         unsigned        sml             :1;     /* Single / Multiple lun supported */
204         unsigned        ncd             :1;     /* Non cd optical device */
205 #elif defined(__BIG_ENDIAN_BITFIELD)
206         unsigned        sflp            :1;     /* System floppy type device */
207         unsigned        srfp            :1;     /* Supports reporting progress of format */
208         unsigned        reserved2       :6;
209         unsigned        ncd             :1;     /* Non cd optical device */
210         unsigned        sml             :1;     /* Single / Multiple lun supported */
211         unsigned        reserved3       :3;
212         unsigned        tlun            :3;     /* Total logical units supported by the device */
213 #else
214 #error "Bitfield endianness not defined! Check your byteorder.h"
215 #endif
216         u8              reserved[8];
217 } idefloppy_capabilities_page_t;
218
219 /*
220  *      Flexible disk page.
221  */
222 typedef struct {
223 #if defined(__LITTLE_ENDIAN_BITFIELD)
224         unsigned        page_code       :6;     /* Page code - Should be 0x5 */
225         unsigned        reserved1_6     :1;     /* Reserved */
226         unsigned        ps              :1;     /* The device is capable of saving the page */
227 #elif defined(__BIG_ENDIAN_BITFIELD)
228         unsigned        ps              :1;     /* The device is capable of saving the page */
229         unsigned        reserved1_6     :1;     /* Reserved */
230         unsigned        page_code       :6;     /* Page code - Should be 0x5 */
231 #else
232 #error "Bitfield endianness not defined! Check your byteorder.h"
233 #endif
234         u8              page_length;            /* Page Length - Should be 0x1e */
235         u16             transfer_rate;          /* In kilobits per second */
236         u8              heads, sectors;         /* Number of heads, Number of sectors per track */
237         u16             sector_size;            /* Byes per sector */
238         u16             cyls;                   /* Number of cylinders */
239         u8              reserved10[10];
240         u8              motor_delay;            /* Motor off delay */
241         u8              reserved21[7];
242         u16             rpm;                    /* Rotations per minute */
243         u8              reserved30[2];
244 } idefloppy_flexible_disk_page_t;
245  
246 /*
247  *      Format capacity
248  */
249 typedef struct {
250         u8              reserved[3];
251         u8              length;                 /* Length of the following descriptors in bytes */
252 } idefloppy_capacity_header_t;
253
254 typedef struct {
255         u32             blocks;                 /* Number of blocks */
256 #if defined(__LITTLE_ENDIAN_BITFIELD)
257         unsigned        dc              :2;     /* Descriptor Code */
258         unsigned        reserved        :6;
259 #elif defined(__BIG_ENDIAN_BITFIELD)
260         unsigned        reserved        :6;
261         unsigned        dc              :2;     /* Descriptor Code */
262 #else
263 #error "Bitfield endianness not defined! Check your byteorder.h"
264 #endif
265         u8              length_msb;             /* Block Length (MSB)*/
266         u16             length;                 /* Block Length */
267 } idefloppy_capacity_descriptor_t;
268
269 #define CAPACITY_INVALID        0x00
270 #define CAPACITY_UNFORMATTED    0x01
271 #define CAPACITY_CURRENT        0x02
272 #define CAPACITY_NO_CARTRIDGE   0x03
273
274 /*
275  *      Most of our global data which we need to save even as we leave the
276  *      driver due to an interrupt or a timer event is stored in a variable
277  *      of type idefloppy_floppy_t, defined below.
278  */
279 typedef struct ide_floppy_obj {
280         ide_drive_t     *drive;
281         ide_driver_t    *driver;
282         struct gendisk  *disk;
283         struct kref     kref;
284         unsigned int    openers;        /* protected by BKL for now */
285
286         /* Current packet command */
287         idefloppy_pc_t *pc;
288         /* Last failed packet command */
289         idefloppy_pc_t *failed_pc;
290         /* Packet command stack */
291         idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
292         /* Next free packet command storage space */
293         int pc_stack_index;
294         struct request rq_stack[IDEFLOPPY_PC_STACK];
295         /* We implement a circular array */
296         int rq_stack_index;
297
298         /*
299          *      Last error information
300          */
301         u8 sense_key, asc, ascq;
302         /* delay this long before sending packet command */
303         u8 ticks;
304         int progress_indication;
305
306         /*
307          *      Device information
308          */
309         /* Current format */
310         int blocks, block_size, bs_factor;
311         /* Last format capacity */
312         idefloppy_capacity_descriptor_t capacity;
313         /* Copy of the flexible disk page */
314         idefloppy_flexible_disk_page_t flexible_disk_page;
315         /* Write protect */
316         int wp;
317         /* Supports format progress report */
318         int srfp;
319         /* Status/Action flags */
320         unsigned long flags;
321 } idefloppy_floppy_t;
322
323 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
324
325 /*
326  *      Floppy flag bits values.
327  */
328 #define IDEFLOPPY_DRQ_INTERRUPT         0       /* DRQ interrupt device */
329 #define IDEFLOPPY_MEDIA_CHANGED         1       /* Media may have changed */
330 #define IDEFLOPPY_USE_READ12            2       /* Use READ12/WRITE12 or READ10/WRITE10 */
331 #define IDEFLOPPY_FORMAT_IN_PROGRESS    3       /* Format in progress */
332 #define IDEFLOPPY_CLIK_DRIVE            4       /* Avoid commands not supported in Clik drive */
333 #define IDEFLOPPY_ZIP_DRIVE             5       /* Requires BH algorithm for packets */
334
335 /*
336  *      ATAPI floppy drive packet commands
337  */
338 #define IDEFLOPPY_FORMAT_UNIT_CMD       0x04
339 #define IDEFLOPPY_INQUIRY_CMD           0x12
340 #define IDEFLOPPY_MODE_SELECT_CMD       0x55
341 #define IDEFLOPPY_MODE_SENSE_CMD        0x5a
342 #define IDEFLOPPY_READ10_CMD            0x28
343 #define IDEFLOPPY_READ12_CMD            0xa8
344 #define IDEFLOPPY_READ_CAPACITY_CMD     0x23
345 #define IDEFLOPPY_REQUEST_SENSE_CMD     0x03
346 #define IDEFLOPPY_PREVENT_REMOVAL_CMD   0x1e
347 #define IDEFLOPPY_SEEK_CMD              0x2b
348 #define IDEFLOPPY_START_STOP_CMD        0x1b
349 #define IDEFLOPPY_TEST_UNIT_READY_CMD   0x00
350 #define IDEFLOPPY_VERIFY_CMD            0x2f
351 #define IDEFLOPPY_WRITE10_CMD           0x2a
352 #define IDEFLOPPY_WRITE12_CMD           0xaa
353 #define IDEFLOPPY_WRITE_VERIFY_CMD      0x2e
354
355 /*
356  *      Defines for the mode sense command
357  */
358 #define MODE_SENSE_CURRENT              0x00
359 #define MODE_SENSE_CHANGEABLE           0x01
360 #define MODE_SENSE_DEFAULT              0x02 
361 #define MODE_SENSE_SAVED                0x03
362
363 /*
364  *      IOCTLs used in low-level formatting.
365  */
366
367 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
368 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
369 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
370 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
371
372 #if 0
373 /*
374  *      Special requests for our block device strategy routine.
375  */
376 #define IDEFLOPPY_FIRST_RQ      90
377
378 /*
379  *      IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue.
380  */
381 #define IDEFLOPPY_PC_RQ         90
382
383 #define IDEFLOPPY_LAST_RQ       90
384
385 /*
386  *      A macro which can be used to check if a given request command
387  *      originated in the driver or in the buffer cache layer.
388  */
389 #define IDEFLOPPY_RQ_CMD(cmd)   ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ))
390
391 #endif
392
393 /*
394  *      Error codes which are returned in rq->errors to the higher part
395  *      of the driver.
396  */
397 #define IDEFLOPPY_ERROR_GENERAL         101
398
399 /*
400  *      The following is used to format the general configuration word of
401  *      the ATAPI IDENTIFY DEVICE command.
402  */
403 struct idefloppy_id_gcw {       
404 #if defined(__LITTLE_ENDIAN_BITFIELD)
405         unsigned packet_size            :2;     /* Packet Size */
406         unsigned reserved234            :3;     /* Reserved */
407         unsigned drq_type               :2;     /* Command packet DRQ type */
408         unsigned removable              :1;     /* Removable media */
409         unsigned device_type            :5;     /* Device type */
410         unsigned reserved13             :1;     /* Reserved */
411         unsigned protocol               :2;     /* Protocol type */
412 #elif defined(__BIG_ENDIAN_BITFIELD)
413         unsigned protocol               :2;     /* Protocol type */
414         unsigned reserved13             :1;     /* Reserved */
415         unsigned device_type            :5;     /* Device type */
416         unsigned removable              :1;     /* Removable media */
417         unsigned drq_type               :2;     /* Command packet DRQ type */
418         unsigned reserved234            :3;     /* Reserved */
419         unsigned packet_size            :2;     /* Packet Size */
420 #else
421 #error "Bitfield endianness not defined! Check your byteorder.h"
422 #endif
423 };
424
425 /*
426  *      INQUIRY packet command - Data Format
427  */
428 typedef struct {
429 #if defined(__LITTLE_ENDIAN_BITFIELD)
430         unsigned        device_type     :5;     /* Peripheral Device Type */
431         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
432         unsigned        reserved1_6t0   :7;     /* Reserved */
433         unsigned        rmb             :1;     /* Removable Medium Bit */
434         unsigned        ansi_version    :3;     /* ANSI Version */
435         unsigned        ecma_version    :3;     /* ECMA Version */
436         unsigned        iso_version     :2;     /* ISO Version */
437         unsigned        response_format :4;     /* Response Data Format */
438         unsigned        reserved3_45    :2;     /* Reserved */
439         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
440         unsigned        reserved3_7     :1;     /* AENC - Reserved */
441 #elif defined(__BIG_ENDIAN_BITFIELD)
442         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
443         unsigned        device_type     :5;     /* Peripheral Device Type */
444         unsigned        rmb             :1;     /* Removable Medium Bit */
445         unsigned        reserved1_6t0   :7;     /* Reserved */
446         unsigned        iso_version     :2;     /* ISO Version */
447         unsigned        ecma_version    :3;     /* ECMA Version */
448         unsigned        ansi_version    :3;     /* ANSI Version */
449         unsigned        reserved3_7     :1;     /* AENC - Reserved */
450         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
451         unsigned        reserved3_45    :2;     /* Reserved */
452         unsigned        response_format :4;     /* Response Data Format */
453 #else
454 #error "Bitfield endianness not defined! Check your byteorder.h"
455 #endif
456         u8              additional_length;      /* Additional Length (total_length-4) */
457         u8              rsv5, rsv6, rsv7;       /* Reserved */
458         u8              vendor_id[8];           /* Vendor Identification */
459         u8              product_id[16];         /* Product Identification */
460         u8              revision_level[4];      /* Revision Level */
461         u8              vendor_specific[20];    /* Vendor Specific - Optional */
462         u8              reserved56t95[40];      /* Reserved - Optional */
463                                                 /* Additional information may be returned */
464 } idefloppy_inquiry_result_t;
465
466 /*
467  *      REQUEST SENSE packet command result - Data Format.
468  */
469 typedef struct {
470 #if defined(__LITTLE_ENDIAN_BITFIELD)
471         unsigned        error_code      :7;     /* Current error (0x70) */
472         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
473         u8              reserved1       :8;     /* Reserved */
474         unsigned        sense_key       :4;     /* Sense Key */
475         unsigned        reserved2_4     :1;     /* Reserved */
476         unsigned        ili             :1;     /* Incorrect Length Indicator */
477         unsigned        reserved2_67    :2;
478 #elif defined(__BIG_ENDIAN_BITFIELD)
479         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
480         unsigned        error_code      :7;     /* Current error (0x70) */
481         u8              reserved1       :8;     /* Reserved */
482         unsigned        reserved2_67    :2;
483         unsigned        ili             :1;     /* Incorrect Length Indicator */
484         unsigned        reserved2_4     :1;     /* Reserved */
485         unsigned        sense_key       :4;     /* Sense Key */
486 #else
487 #error "Bitfield endianness not defined! Check your byteorder.h"
488 #endif
489         u32             information __attribute__ ((packed));
490         u8              asl;                    /* Additional sense length (n-7) */
491         u32             command_specific;       /* Additional command specific information */
492         u8              asc;                    /* Additional Sense Code */
493         u8              ascq;                   /* Additional Sense Code Qualifier */
494         u8              replaceable_unit_code;  /* Field Replaceable Unit Code */
495         u8              sksv[3];
496         u8              pad[2];                 /* Padding to 20 bytes */
497 } idefloppy_request_sense_result_t;
498
499 /*
500  *      Pages of the SELECT SENSE / MODE SENSE packet commands.
501  */
502 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
503 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
504
505 /*
506  *      Mode Parameter Header for the MODE SENSE packet command
507  */
508 typedef struct {
509         u16             mode_data_length;       /* Length of the following data transfer */
510         u8              medium_type;            /* Medium Type */
511 #if defined(__LITTLE_ENDIAN_BITFIELD)
512         unsigned        reserved3       :7;
513         unsigned        wp              :1;     /* Write protect */
514 #elif defined(__BIG_ENDIAN_BITFIELD)
515         unsigned        wp              :1;     /* Write protect */
516         unsigned        reserved3       :7;
517 #else
518 #error "Bitfield endianness not defined! Check your byteorder.h"
519 #endif
520         u8              reserved[4];
521 } idefloppy_mode_parameter_header_t;
522
523 static DEFINE_MUTEX(idefloppy_ref_mutex);
524
525 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
526
527 #define ide_floppy_g(disk) \
528         container_of((disk)->private_data, struct ide_floppy_obj, driver)
529
530 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
531 {
532         struct ide_floppy_obj *floppy = NULL;
533
534         mutex_lock(&idefloppy_ref_mutex);
535         floppy = ide_floppy_g(disk);
536         if (floppy)
537                 kref_get(&floppy->kref);
538         mutex_unlock(&idefloppy_ref_mutex);
539         return floppy;
540 }
541
542 static void ide_floppy_release(struct kref *);
543
544 static void ide_floppy_put(struct ide_floppy_obj *floppy)
545 {
546         mutex_lock(&idefloppy_ref_mutex);
547         kref_put(&floppy->kref, ide_floppy_release);
548         mutex_unlock(&idefloppy_ref_mutex);
549 }
550
551 /*
552  *      Too bad. The drive wants to send us data which we are not ready to accept.
553  *      Just throw it away.
554  */
555 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
556 {
557         while (bcount--)
558                 (void) HWIF(drive)->INB(IDE_DATA_REG);
559 }
560
561 #if IDEFLOPPY_DEBUG_BUGS
562 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
563 {
564         while (bcount--)
565                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
566 }
567 #endif /* IDEFLOPPY_DEBUG_BUGS */
568
569
570 /*
571  *      idefloppy_do_end_request is used to finish servicing a request.
572  *
573  *      For read/write requests, we will call ide_end_request to pass to the
574  *      next buffer.
575  */
576 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
577 {
578         idefloppy_floppy_t *floppy = drive->driver_data;
579         struct request *rq = HWGROUP(drive)->rq;
580         int error;
581
582         debug_log(KERN_INFO "Reached idefloppy_end_request\n");
583
584         switch (uptodate) {
585                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
586                 case 1: error = 0; break;
587                 default: error = uptodate;
588         }
589         if (error)
590                 floppy->failed_pc = NULL;
591         /* Why does this happen? */
592         if (!rq)
593                 return 0;
594         if (!blk_special_request(rq)) {
595                 /* our real local end request function */
596                 ide_end_request(drive, uptodate, nsecs);
597                 return 0;
598         }
599         rq->errors = error;
600         /* fixme: need to move this local also */
601         ide_end_drive_cmd(drive, 0, 0);
602         return 0;
603 }
604
605 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
606 {
607         struct request *rq = pc->rq;
608         struct bio_vec *bvec;
609         struct req_iterator iter;
610         unsigned long flags;
611         char *data;
612         int count, done = 0;
613
614         rq_for_each_segment(bvec, rq, iter) {
615                 if (!bcount)
616                         break;
617
618                 count = min(bvec->bv_len, bcount);
619
620                 data = bvec_kmap_irq(bvec, &flags);
621                 drive->hwif->atapi_input_bytes(drive, data, count);
622                 bvec_kunmap_irq(data, &flags);
623
624                 bcount -= count;
625                 pc->b_count += count;
626                 done += count;
627         }
628
629         idefloppy_do_end_request(drive, 1, done >> 9);
630
631         if (bcount) {
632                 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
633                 idefloppy_discard_data(drive, bcount);
634         }
635 }
636
637 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
638 {
639         struct request *rq = pc->rq;
640         struct req_iterator iter;
641         struct bio_vec *bvec;
642         unsigned long flags;
643         int count, done = 0;
644         char *data;
645
646         rq_for_each_segment(bvec, rq, iter) {
647                 if (!bcount)
648                         break;
649
650                 count = min(bvec->bv_len, bcount);
651
652                 data = bvec_kmap_irq(bvec, &flags);
653                 drive->hwif->atapi_output_bytes(drive, data, count);
654                 bvec_kunmap_irq(data, &flags);
655
656                 bcount -= count;
657                 pc->b_count += count;
658                 done += count;
659         }
660
661         idefloppy_do_end_request(drive, 1, done >> 9);
662
663 #if IDEFLOPPY_DEBUG_BUGS
664         if (bcount) {
665                 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
666                 idefloppy_write_zeros(drive, bcount);
667         }
668 #endif
669 }
670
671 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
672 {
673         struct request *rq = pc->rq;
674         struct bio *bio = rq->bio;
675
676         while ((bio = rq->bio) != NULL)
677                 idefloppy_do_end_request(drive, 1, 0);
678 }
679
680 /*
681  *      idefloppy_queue_pc_head generates a new packet command request in front
682  *      of the request queue, before the current request, so that it will be
683  *      processed immediately, on the next pass through the driver.
684  */
685 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
686 {
687         struct ide_floppy_obj *floppy = drive->driver_data;
688
689         ide_init_drive_cmd(rq);
690         rq->buffer = (char *) pc;
691         rq->cmd_type = REQ_TYPE_SPECIAL;
692         rq->rq_disk = floppy->disk;
693         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
694 }
695
696 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
697 {
698         idefloppy_floppy_t *floppy = drive->driver_data;
699
700         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
701                 floppy->pc_stack_index=0;
702         return (&floppy->pc_stack[floppy->pc_stack_index++]);
703 }
704
705 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
706 {
707         idefloppy_floppy_t *floppy = drive->driver_data;
708
709         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
710                 floppy->rq_stack_index = 0;
711         return (&floppy->rq_stack[floppy->rq_stack_index++]);
712 }
713
714 /*
715  *      idefloppy_analyze_error is called on each failed packet command retry
716  *      to analyze the request sense.
717  */
718 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
719 {
720         idefloppy_floppy_t *floppy = drive->driver_data;
721
722         floppy->sense_key = result->sense_key;
723         floppy->asc = result->asc;
724         floppy->ascq = result->ascq;
725         floppy->progress_indication = result->sksv[0] & 0x80 ?
726                 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
727         if (floppy->failed_pc)
728                 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
729                         "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
730                         result->sense_key, result->asc, result->ascq);
731         else
732                 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
733                         "ascq = %x\n", result->sense_key,
734                         result->asc, result->ascq);
735 }
736
737 static void idefloppy_request_sense_callback (ide_drive_t *drive)
738 {
739         idefloppy_floppy_t *floppy = drive->driver_data;
740
741         debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
742         
743         if (!floppy->pc->error) {
744                 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
745                 idefloppy_do_end_request(drive, 1, 0);
746         } else {
747                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
748                 idefloppy_do_end_request(drive, 0, 0);
749         }
750 }
751
752 /*
753  *      General packet command callback function.
754  */
755 static void idefloppy_pc_callback (ide_drive_t *drive)
756 {
757         idefloppy_floppy_t *floppy = drive->driver_data;
758         
759         debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
760
761         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
762 }
763
764 /*
765  *      idefloppy_init_pc initializes a packet command.
766  */
767 static void idefloppy_init_pc (idefloppy_pc_t *pc)
768 {
769         memset(pc->c, 0, 12);
770         pc->retries = 0;
771         pc->flags = 0;
772         pc->request_transfer = 0;
773         pc->buffer = pc->pc_buffer;
774         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
775         pc->callback = &idefloppy_pc_callback;
776 }
777
778 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
779 {
780         idefloppy_init_pc(pc);  
781         pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
782         pc->c[4] = 255;
783         pc->request_transfer = 18;
784         pc->callback = &idefloppy_request_sense_callback;
785 }
786
787 /*
788  *      idefloppy_retry_pc is called when an error was detected during the
789  *      last packet command. We queue a request sense packet command in
790  *      the head of the request list.
791  */
792 static void idefloppy_retry_pc (ide_drive_t *drive)
793 {
794         idefloppy_pc_t *pc;
795         struct request *rq;
796         atapi_error_t error;
797
798         error.all = HWIF(drive)->INB(IDE_ERROR_REG);
799         pc = idefloppy_next_pc_storage(drive);
800         rq = idefloppy_next_rq_storage(drive);
801         idefloppy_create_request_sense_cmd(pc);
802         idefloppy_queue_pc_head(drive, pc, rq);
803 }
804
805 /*
806  *      idefloppy_pc_intr is the usual interrupt handler which will be called
807  *      during a packet command.
808  */
809 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
810 {
811         idefloppy_floppy_t *floppy = drive->driver_data;
812         atapi_status_t status;
813         atapi_bcount_t bcount;
814         atapi_ireason_t ireason;
815         idefloppy_pc_t *pc = floppy->pc;
816         struct request *rq = pc->rq;
817         unsigned int temp;
818
819         debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
820                 __FUNCTION__);
821
822         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
823                 if (HWIF(drive)->ide_dma_end(drive)) {
824                         set_bit(PC_DMA_ERROR, &pc->flags);
825                 } else {
826                         pc->actually_transferred = pc->request_transfer;
827                         idefloppy_update_buffers(drive, pc);
828                 }
829                 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
830         }
831
832         /* Clear the interrupt */
833         status.all = HWIF(drive)->INB(IDE_STATUS_REG);
834
835         if (!status.b.drq) {                    /* No more interrupts */
836                 debug_log(KERN_INFO "Packet command completed, %d bytes "
837                         "transferred\n", pc->actually_transferred);
838                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
839
840                 local_irq_enable_in_hardirq();
841
842                 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
843                         /* Error detected */
844                         debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
845                                 drive->name);
846                         rq->errors++;
847                         if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
848                                 printk(KERN_ERR "ide-floppy: I/O error in "
849                                         "request sense command\n");
850                                 return ide_do_reset(drive);
851                         }
852                         /* Retry operation */
853                         idefloppy_retry_pc(drive);
854                         /* queued, but not started */
855                         return ide_stopped;
856                 }
857                 pc->error = 0;
858                 if (floppy->failed_pc == pc)
859                         floppy->failed_pc = NULL;
860                 /* Command finished - Call the callback function */
861                 pc->callback(drive);
862                 return ide_stopped;
863         }
864
865         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
866                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
867                         "more interrupts in DMA mode\n");
868                 ide_dma_off(drive);
869                 return ide_do_reset(drive);
870         }
871
872         /* Get the number of bytes to transfer */
873         bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
874         bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
875         /* on this interrupt */
876         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
877
878         if (ireason.b.cod) {
879                 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
880                 return ide_do_reset(drive);
881         }
882         if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
883                 /* Hopefully, we will never get here */
884                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
885                         ireason.b.io ? "Write":"Read");
886                 printk(KERN_ERR "but the floppy wants us to %s !\n",
887                         ireason.b.io ? "Read":"Write");
888                 return ide_do_reset(drive);
889         }
890         if (!test_bit(PC_WRITING, &pc->flags)) {
891                 /* Reading - Check that we have enough space */
892                 temp = pc->actually_transferred + bcount.all;
893                 if (temp > pc->request_transfer) {
894                         if (temp > pc->buffer_size) {
895                                 printk(KERN_ERR "ide-floppy: The floppy wants "
896                                         "to send us more data than expected "
897                                         "- discarding data\n");
898                                 idefloppy_discard_data(drive,bcount.all);
899                                 BUG_ON(HWGROUP(drive)->handler != NULL);
900                                 ide_set_handler(drive,
901                                                 &idefloppy_pc_intr,
902                                                 IDEFLOPPY_WAIT_CMD,
903                                                 NULL);
904                                 return ide_started;
905                         }
906                         debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
907                                 "send us more data than expected - "
908                                 "allowing transfer\n");
909                 }
910         }
911         if (test_bit(PC_WRITING, &pc->flags)) {
912                 if (pc->buffer != NULL)
913                         /* Write the current buffer */
914                         HWIF(drive)->atapi_output_bytes(drive,
915                                                 pc->current_position,
916                                                 bcount.all);
917                 else
918                         idefloppy_output_buffers(drive, pc, bcount.all);
919         } else {
920                 if (pc->buffer != NULL)
921                         /* Read the current buffer */
922                         HWIF(drive)->atapi_input_bytes(drive,
923                                                 pc->current_position,
924                                                 bcount.all);
925                 else
926                         idefloppy_input_buffers(drive, pc, bcount.all);
927         }
928         /* Update the current position */
929         pc->actually_transferred += bcount.all;
930         pc->current_position += bcount.all;
931
932         BUG_ON(HWGROUP(drive)->handler != NULL);
933         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
934         return ide_started;
935 }
936
937 /*
938  * This is the original routine that did the packet transfer.
939  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
940  * for that drive below. The algorithm is chosen based on drive type
941  */
942 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
943 {
944         ide_startstop_t startstop;
945         idefloppy_floppy_t *floppy = drive->driver_data;
946         atapi_ireason_t ireason;
947
948         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
949                 printk(KERN_ERR "ide-floppy: Strange, packet command "
950                                 "initiated yet DRQ isn't asserted\n");
951                 return startstop;
952         }
953         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
954         if (!ireason.b.cod || ireason.b.io) {
955                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
956                                 "issuing a packet command\n");
957                 return ide_do_reset(drive);
958         }
959         BUG_ON(HWGROUP(drive)->handler != NULL);
960         /* Set the interrupt routine */
961         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
962         /* Send the actual packet */
963         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
964         return ide_started;
965 }
966
967
968 /*
969  * What we have here is a classic case of a top half / bottom half
970  * interrupt service routine. In interrupt mode, the device sends
971  * an interrupt to signal it's ready to receive a packet. However,
972  * we need to delay about 2-3 ticks before issuing the packet or we
973  * gets in trouble.
974  *
975  * So, follow carefully. transfer_pc1 is called as an interrupt (or
976  * directly). In either case, when the device says it's ready for a 
977  * packet, we schedule the packet transfer to occur about 2-3 ticks
978  * later in transfer_pc2.
979  */
980 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
981 {
982         idefloppy_floppy_t *floppy = drive->driver_data;
983
984         /* Send the actual packet */
985         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
986         /* Timeout for the packet command */
987         return IDEFLOPPY_WAIT_CMD;
988 }
989
990 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
991 {
992         idefloppy_floppy_t *floppy = drive->driver_data;
993         ide_startstop_t startstop;
994         atapi_ireason_t ireason;
995
996         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
997                 printk(KERN_ERR "ide-floppy: Strange, packet command "
998                                 "initiated yet DRQ isn't asserted\n");
999                 return startstop;
1000         }
1001         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
1002         if (!ireason.b.cod || ireason.b.io) {
1003                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
1004                                 "while issuing a packet command\n");
1005                 return ide_do_reset(drive);
1006         }
1007         /* 
1008          * The following delay solves a problem with ATAPI Zip 100 drives
1009          * where the Busy flag was apparently being deasserted before the
1010          * unit was ready to receive data. This was happening on a
1011          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
1012          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
1013          * used until after the packet is moved in about 50 msec.
1014          */
1015         BUG_ON(HWGROUP(drive)->handler != NULL);
1016         ide_set_handler(drive, 
1017           &idefloppy_pc_intr,           /* service routine for packet command */
1018           floppy->ticks,                /* wait this long before "failing" */
1019           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
1020         return ide_started;
1021 }
1022
1023 /**
1024  * idefloppy_should_report_error()
1025  *
1026  * Supresses error messages resulting from Medium not present
1027  */
1028 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1029 {
1030         if (floppy->sense_key == 0x02 &&
1031             floppy->asc       == 0x3a &&
1032             floppy->ascq      == 0x00)
1033                 return 0;
1034         return 1;
1035 }
1036
1037 /*
1038  *      Issue a packet command
1039  */
1040 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1041 {
1042         idefloppy_floppy_t *floppy = drive->driver_data;
1043         ide_hwif_t *hwif = drive->hwif;
1044         atapi_feature_t feature;
1045         atapi_bcount_t bcount;
1046         ide_handler_t *pkt_xfer_routine;
1047
1048 #if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone
1049          and have lived on another thread's stack; that stack may have become
1050          unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */
1051 #if IDEFLOPPY_DEBUG_BUGS
1052         if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD &&
1053             pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
1054                 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - "
1055                         "Two request sense in serial were issued\n");
1056         }
1057 #endif /* IDEFLOPPY_DEBUG_BUGS */
1058 #endif
1059
1060         if (floppy->failed_pc == NULL &&
1061             pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1062                 floppy->failed_pc = pc;
1063         /* Set the current packet command */
1064         floppy->pc = pc;
1065
1066         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1067             test_bit(PC_ABORT, &pc->flags)) {
1068                 /*
1069                  *      We will "abort" retrying a packet command in case
1070                  *      a legitimate error code was received.
1071                  */
1072                 if (!test_bit(PC_ABORT, &pc->flags)) {
1073                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1074                                 if (idefloppy_should_report_error(floppy))
1075                                         printk(KERN_ERR "ide-floppy: %s: I/O error, "
1076                                                "pc = %2x, key = %2x, "
1077                                                "asc = %2x, ascq = %2x\n",
1078                                                drive->name, pc->c[0],
1079                                                floppy->sense_key,
1080                                                floppy->asc, floppy->ascq);
1081                         }
1082                         /* Giving up */
1083                         pc->error = IDEFLOPPY_ERROR_GENERAL;
1084                 }
1085                 floppy->failed_pc = NULL;
1086                 pc->callback(drive);
1087                 return ide_stopped;
1088         }
1089
1090         debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1091
1092         pc->retries++;
1093         /* We haven't transferred any data yet */
1094         pc->actually_transferred = 0;
1095         pc->current_position = pc->buffer;
1096         bcount.all = min(pc->request_transfer, 63 * 1024);
1097
1098         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
1099                 ide_dma_off(drive);
1100
1101         feature.all = 0;
1102
1103         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1104                 feature.b.dma = !hwif->dma_setup(drive);
1105
1106         if (IDE_CONTROL_REG)
1107                 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1108         /* Use PIO/DMA */
1109         HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
1110         HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
1111         HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
1112         HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1113
1114         if (feature.b.dma) {    /* Begin DMA, if necessary */
1115                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1116                 hwif->dma_start(drive);
1117         }
1118
1119         /* Can we transfer the packet when we get the interrupt or wait? */
1120         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1121                 /* wait */
1122                 pkt_xfer_routine = &idefloppy_transfer_pc1;
1123         } else {
1124                 /* immediate */
1125                 pkt_xfer_routine = &idefloppy_transfer_pc;
1126         }
1127         
1128         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1129                 /* Issue the packet command */
1130                 ide_execute_command(drive, WIN_PACKETCMD,
1131                                 pkt_xfer_routine,
1132                                 IDEFLOPPY_WAIT_CMD,
1133                                 NULL);
1134                 return ide_started;
1135         } else {
1136                 /* Issue the packet command */
1137                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1138                 return (*pkt_xfer_routine) (drive);
1139         }
1140 }
1141
1142 static void idefloppy_rw_callback (ide_drive_t *drive)
1143 {
1144         debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1145
1146         idefloppy_do_end_request(drive, 1, 0);
1147         return;
1148 }
1149
1150 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1151 {
1152         debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1153                 "prevent = %d\n", prevent);
1154
1155         idefloppy_init_pc(pc);
1156         pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1157         pc->c[4] = prevent;
1158 }
1159
1160 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1161 {
1162         idefloppy_init_pc(pc);
1163         pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1164         pc->c[7] = 255;
1165         pc->c[8] = 255;
1166         pc->request_transfer = 255;
1167 }
1168
1169 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1170                                               int flags)
1171 {
1172         idefloppy_init_pc(pc);
1173         pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1174         pc->c[1] = 0x17;
1175
1176         memset(pc->buffer, 0, 12);
1177         pc->buffer[1] = 0xA2;
1178         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1179
1180         if (flags & 1)                          /* Verify bit on... */
1181                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
1182         pc->buffer[3] = 8;
1183
1184         put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1185         put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1186         pc->buffer_size=12;
1187         set_bit(PC_WRITING, &pc->flags);
1188 }
1189
1190 /*
1191  *      A mode sense command is used to "sense" floppy parameters.
1192  */
1193 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1194 {
1195         u16 length = sizeof(idefloppy_mode_parameter_header_t);
1196         
1197         idefloppy_init_pc(pc);
1198         pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1199         pc->c[1] = 0;
1200         pc->c[2] = page_code + (type << 6);
1201
1202         switch (page_code) {
1203                 case IDEFLOPPY_CAPABILITIES_PAGE:
1204                         length += 12;
1205                         break;
1206                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1207                         length += 32;
1208                         break;
1209                 default:
1210                         printk(KERN_ERR "ide-floppy: unsupported page code "
1211                                 "in create_mode_sense_cmd\n");
1212         }
1213         put_unaligned(htons(length), (u16 *) &pc->c[7]);
1214         pc->request_transfer = length;
1215 }
1216
1217 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1218 {
1219         idefloppy_init_pc(pc);
1220         pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1221         pc->c[4] = start;
1222 }
1223
1224 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1225 {
1226         idefloppy_init_pc(pc);
1227         pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1228 }
1229
1230 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1231 {
1232         int block = sector / floppy->bs_factor;
1233         int blocks = rq->nr_sectors / floppy->bs_factor;
1234         int cmd = rq_data_dir(rq);
1235
1236         debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1237                 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1238                 block, blocks);
1239
1240         idefloppy_init_pc(pc);
1241         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1242                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1243                 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1244         } else {
1245                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1246                 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1247         }
1248         put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1249         pc->callback = &idefloppy_rw_callback;
1250         pc->rq = rq;
1251         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1252         if (rq->cmd_flags & REQ_RW)
1253                 set_bit(PC_WRITING, &pc->flags);
1254         pc->buffer = NULL;
1255         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1256         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1257 }
1258
1259 static void
1260 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1261 {
1262         idefloppy_init_pc(pc);
1263         pc->callback = &idefloppy_rw_callback;
1264         memcpy(pc->c, rq->cmd, sizeof(pc->c));
1265         pc->rq = rq;
1266         pc->b_count = rq->data_len;
1267         if (rq->data_len && rq_data_dir(rq) == WRITE)
1268                 set_bit(PC_WRITING, &pc->flags);
1269         pc->buffer = rq->data;
1270         if (rq->bio)
1271                 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1272                 
1273         /*
1274          * possibly problematic, doesn't look like ide-floppy correctly
1275          * handled scattered requests if dma fails...
1276          */
1277         pc->request_transfer = pc->buffer_size = rq->data_len;
1278 }
1279
1280 /*
1281  *      idefloppy_do_request is our request handling function.  
1282  */
1283 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1284 {
1285         idefloppy_floppy_t *floppy = drive->driver_data;
1286         idefloppy_pc_t *pc;
1287         unsigned long block = (unsigned long)block_s;
1288
1289         debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
1290                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
1291                         rq->flags, rq->errors);
1292         debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1293                         "current_nr_sectors: %d\n", (long)rq->sector,
1294                         rq->nr_sectors, rq->current_nr_sectors);
1295
1296         if (rq->errors >= ERROR_MAX) {
1297                 if (floppy->failed_pc != NULL) {
1298                         if (idefloppy_should_report_error(floppy))
1299                                 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1300                                        " key = %2x, asc = %2x, ascq = %2x\n",
1301                                        drive->name, floppy->failed_pc->c[0],
1302                                        floppy->sense_key, floppy->asc, floppy->ascq);
1303                 }
1304                 else
1305                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1306                                 drive->name);
1307                 idefloppy_do_end_request(drive, 0, 0);
1308                 return ide_stopped;
1309         }
1310         if (blk_fs_request(rq)) {
1311                 if (((long)rq->sector % floppy->bs_factor) ||
1312                     (rq->nr_sectors % floppy->bs_factor)) {
1313                         printk("%s: unsupported r/w request size\n",
1314                                 drive->name);
1315                         idefloppy_do_end_request(drive, 0, 0);
1316                         return ide_stopped;
1317                 }
1318                 pc = idefloppy_next_pc_storage(drive);
1319                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1320         } else if (blk_special_request(rq)) {
1321                 pc = (idefloppy_pc_t *) rq->buffer;
1322         } else if (blk_pc_request(rq)) {
1323                 pc = idefloppy_next_pc_storage(drive);
1324                 idefloppy_blockpc_cmd(floppy, pc, rq);
1325         } else {
1326                 blk_dump_rq_flags(rq,
1327                         "ide-floppy: unsupported command in queue");
1328                 idefloppy_do_end_request(drive, 0, 0);
1329                 return ide_stopped;
1330         }
1331
1332         pc->rq = rq;
1333         return idefloppy_issue_pc(drive, pc);
1334 }
1335
1336 /*
1337  *      idefloppy_queue_pc_tail adds a special packet command request to the
1338  *      tail of the request queue, and waits for it to be serviced.
1339  */
1340 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1341 {
1342         struct ide_floppy_obj *floppy = drive->driver_data;
1343         struct request rq;
1344
1345         ide_init_drive_cmd (&rq);
1346         rq.buffer = (char *) pc;
1347         rq.cmd_type = REQ_TYPE_SPECIAL;
1348         rq.rq_disk = floppy->disk;
1349
1350         return ide_do_drive_cmd(drive, &rq, ide_wait);
1351 }
1352
1353 /*
1354  *      Look at the flexible disk page parameters. We will ignore the CHS
1355  *      capacity parameters and use the LBA parameters instead.
1356  */
1357 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1358 {
1359         idefloppy_floppy_t *floppy = drive->driver_data;
1360         idefloppy_pc_t pc;
1361         idefloppy_mode_parameter_header_t *header;
1362         idefloppy_flexible_disk_page_t *page;
1363         int capacity, lba_capacity;
1364
1365         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1366         if (idefloppy_queue_pc_tail(drive,&pc)) {
1367                 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1368                         "page parameters\n");
1369                 return 1;
1370         }
1371         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1372         floppy->wp = header->wp;
1373         set_disk_ro(floppy->disk, floppy->wp);
1374         page = (idefloppy_flexible_disk_page_t *) (header + 1);
1375
1376         page->transfer_rate = ntohs(page->transfer_rate);
1377         page->sector_size = ntohs(page->sector_size);
1378         page->cyls = ntohs(page->cyls);
1379         page->rpm = ntohs(page->rpm);
1380         capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1381         if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1382                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1383                                 "%d sector size, %d rpm\n",
1384                         drive->name, capacity / 1024, page->cyls,
1385                         page->heads, page->sectors,
1386                         page->transfer_rate / 8, page->sector_size, page->rpm);
1387
1388         floppy->flexible_disk_page = *page;
1389         drive->bios_cyl = page->cyls;
1390         drive->bios_head = page->heads;
1391         drive->bios_sect = page->sectors;
1392         lba_capacity = floppy->blocks * floppy->block_size;
1393         if (capacity < lba_capacity) {
1394                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1395                         "bytes, but the drive only handles %d\n",
1396                         drive->name, lba_capacity, capacity);
1397                 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1398         }
1399         return 0;
1400 }
1401
1402 static int idefloppy_get_capability_page(ide_drive_t *drive)
1403 {
1404         idefloppy_floppy_t *floppy = drive->driver_data;
1405         idefloppy_pc_t pc;
1406         idefloppy_mode_parameter_header_t *header;
1407         idefloppy_capabilities_page_t *page;
1408
1409         floppy->srfp = 0;
1410         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1411                                                  MODE_SENSE_CURRENT);
1412
1413         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1414         if (idefloppy_queue_pc_tail(drive,&pc)) {
1415                 return 1;
1416         }
1417
1418         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1419         page= (idefloppy_capabilities_page_t *)(header+1);
1420         floppy->srfp = page->srfp;
1421         return (0);
1422 }
1423
1424 /*
1425  *      Determine if a media is present in the floppy drive, and if so,
1426  *      its LBA capacity.
1427  */
1428 static int idefloppy_get_capacity (ide_drive_t *drive)
1429 {
1430         idefloppy_floppy_t *floppy = drive->driver_data;
1431         idefloppy_pc_t pc;
1432         idefloppy_capacity_header_t *header;
1433         idefloppy_capacity_descriptor_t *descriptor;
1434         int i, descriptors, rc = 1, blocks, length;
1435         
1436         drive->bios_cyl = 0;
1437         drive->bios_head = drive->bios_sect = 0;
1438         floppy->blocks = 0;
1439         floppy->bs_factor = 1;
1440         set_capacity(floppy->disk, 0);
1441
1442         idefloppy_create_read_capacity_cmd(&pc);
1443         if (idefloppy_queue_pc_tail(drive, &pc)) {
1444                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1445                 return 1;
1446         }
1447         header = (idefloppy_capacity_header_t *) pc.buffer;
1448         descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1449         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1450
1451         for (i = 0; i < descriptors; i++, descriptor++) {
1452                 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1453                 length = descriptor->length = ntohs(descriptor->length);
1454
1455                 if (!i) 
1456                 {
1457                 switch (descriptor->dc) {
1458                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1459                 case CAPACITY_UNFORMATTED:
1460                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1461                                 /*
1462                                  * If it is not a clik drive, break out
1463                                  * (maintains previous driver behaviour)
1464                                  */
1465                                 break;
1466                 case CAPACITY_CURRENT:
1467                         /* Normal Zip/LS-120 disks */
1468                         if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1469                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1470                                         "sector size\n", drive->name,
1471                                         blocks * length / 1024, blocks, length);
1472                         floppy->capacity = *descriptor;
1473                         if (!length || length % 512) {
1474                                 printk(KERN_NOTICE "%s: %d bytes block size "
1475                                         "not supported\n", drive->name, length);
1476                         } else {
1477                                 floppy->blocks = blocks;
1478                                 floppy->block_size = length;
1479                                 if ((floppy->bs_factor = length / 512) != 1)
1480                                         printk(KERN_NOTICE "%s: warning: non "
1481                                                 "512 bytes block size not "
1482                                                 "fully supported\n",
1483                                                 drive->name);
1484                                 rc = 0;
1485                         }
1486                         break;
1487                 case CAPACITY_NO_CARTRIDGE:
1488                         /*
1489                          * This is a KERN_ERR so it appears on screen
1490                          * for the user to see
1491                          */
1492                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1493                         break;
1494                 case CAPACITY_INVALID:
1495                         printk(KERN_ERR "%s: Invalid capacity for disk "
1496                                 "in drive\n", drive->name);
1497                         break;
1498                 }
1499                 }
1500                 if (!i) {
1501                         debug_log( "Descriptor 0 Code: %d\n",
1502                                 descriptor->dc);
1503                 }
1504                 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1505                         "sector size\n", i, blocks * length / 1024, blocks,
1506                         length);
1507         }
1508
1509         /* Clik! disk does not support get_flexible_disk_page */
1510         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1511                 (void) idefloppy_get_flexible_disk_page(drive);
1512         }
1513
1514         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1515         return rc;
1516 }
1517
1518 /*
1519 ** Obtain the list of formattable capacities.
1520 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1521 ** descriptors to userland, instead of our own structures.
1522 **
1523 ** Userland gives us the following structure:
1524 **
1525 ** struct idefloppy_format_capacities {
1526 **        int nformats;
1527 **        struct {
1528 **                int nblocks;
1529 **                int blocksize;
1530 **                } formats[];
1531 **        } ;
1532 **
1533 ** userland initializes nformats to the number of allocated formats[]
1534 ** records.  On exit we set nformats to the number of records we've
1535 ** actually initialized.
1536 **
1537 */
1538
1539 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1540 {
1541         idefloppy_pc_t pc;
1542         idefloppy_capacity_header_t *header;
1543         idefloppy_capacity_descriptor_t *descriptor;
1544         int i, descriptors, blocks, length;
1545         int u_array_size;
1546         int u_index;
1547         int __user *argp;
1548
1549         if (get_user(u_array_size, arg))
1550                 return (-EFAULT);
1551
1552         if (u_array_size <= 0)
1553                 return (-EINVAL);
1554
1555         idefloppy_create_read_capacity_cmd(&pc);
1556         if (idefloppy_queue_pc_tail(drive, &pc)) {
1557                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1558                 return (-EIO);
1559         }
1560         header = (idefloppy_capacity_header_t *) pc.buffer;
1561         descriptors = header->length /
1562                 sizeof(idefloppy_capacity_descriptor_t);
1563         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1564
1565         u_index = 0;
1566         argp = arg + 1;
1567
1568         /*
1569         ** We always skip the first capacity descriptor.  That's the
1570         ** current capacity.  We are interested in the remaining descriptors,
1571         ** the formattable capacities.
1572         */
1573
1574         for (i=0; i<descriptors; i++, descriptor++) {
1575                 if (u_index >= u_array_size)
1576                         break;  /* User-supplied buffer too small */
1577                 if (i == 0)
1578                         continue;       /* Skip the first descriptor */
1579
1580                 blocks = ntohl(descriptor->blocks);
1581                 length = ntohs(descriptor->length);
1582
1583                 if (put_user(blocks, argp))
1584                         return(-EFAULT);
1585                 ++argp;
1586
1587                 if (put_user(length, argp))
1588                         return (-EFAULT);
1589                 ++argp;
1590
1591                 ++u_index;
1592         }
1593
1594         if (put_user(u_index, arg))
1595                 return (-EFAULT);
1596         return (0);
1597 }
1598
1599 /*
1600 ** Send ATAPI_FORMAT_UNIT to the drive.
1601 **
1602 ** Userland gives us the following structure:
1603 **
1604 ** struct idefloppy_format_command {
1605 **        int nblocks;
1606 **        int blocksize;
1607 **        int flags;
1608 **        } ;
1609 **
1610 ** flags is a bitmask, currently, the only defined flag is:
1611 **
1612 **        0x01 - verify media after format.
1613 */
1614
1615 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1616 {
1617         int blocks;
1618         int length;
1619         int flags;
1620         idefloppy_pc_t pc;
1621
1622         if (get_user(blocks, arg) ||
1623             get_user(length, arg+1) ||
1624             get_user(flags, arg+2)) {
1625                 return (-EFAULT);
1626         }
1627
1628         /* Get the SFRP bit */
1629         (void) idefloppy_get_capability_page(drive);
1630         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1631         if (idefloppy_queue_pc_tail(drive, &pc)) {
1632                 return (-EIO);
1633         }
1634
1635         return (0);
1636 }
1637
1638 /*
1639 ** Get ATAPI_FORMAT_UNIT progress indication.
1640 **
1641 ** Userland gives a pointer to an int.  The int is set to a progress
1642 ** indicator 0-65536, with 65536=100%.
1643 **
1644 ** If the drive does not support format progress indication, we just check
1645 ** the dsc bit, and return either 0 or 65536.
1646 */
1647
1648 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1649 {
1650         idefloppy_floppy_t *floppy = drive->driver_data;
1651         idefloppy_pc_t pc;
1652         int progress_indication = 0x10000;
1653
1654         if (floppy->srfp) {
1655                 idefloppy_create_request_sense_cmd(&pc);
1656                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1657                         return (-EIO);
1658                 }
1659
1660                 if (floppy->sense_key == 2 &&
1661                     floppy->asc == 4 &&
1662                     floppy->ascq == 4) {
1663                         progress_indication = floppy->progress_indication;
1664                 }
1665                 /* Else assume format_unit has finished, and we're
1666                 ** at 0x10000 */
1667         } else {
1668                 atapi_status_t status;
1669                 unsigned long flags;
1670
1671                 local_irq_save(flags);
1672                 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
1673                 local_irq_restore(flags);
1674
1675                 progress_indication = !status.b.dsc ? 0 : 0x10000;
1676         }
1677         if (put_user(progress_indication, arg))
1678                 return (-EFAULT);
1679
1680         return (0);
1681 }
1682
1683 /*
1684  *      Return the current floppy capacity.
1685  */
1686 static sector_t idefloppy_capacity (ide_drive_t *drive)
1687 {
1688         idefloppy_floppy_t *floppy = drive->driver_data;
1689         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1690
1691         return capacity;
1692 }
1693
1694 /*
1695  *      idefloppy_identify_device checks if we can support a drive,
1696  *      based on the ATAPI IDENTIFY command results.
1697  */
1698 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1699 {
1700         struct idefloppy_id_gcw gcw;
1701 #if IDEFLOPPY_DEBUG_INFO
1702         u16 mask,i;
1703         char buffer[80];
1704 #endif /* IDEFLOPPY_DEBUG_INFO */
1705
1706         *((u16 *) &gcw) = id->config;
1707
1708 #ifdef CONFIG_PPC
1709         /* kludge for Apple PowerBook internal zip */
1710         if ((gcw.device_type == 5) &&
1711             !strstr(id->model, "CD-ROM") &&
1712             strstr(id->model, "ZIP"))
1713                 gcw.device_type = 0;                    
1714 #endif
1715
1716 #if IDEFLOPPY_DEBUG_INFO
1717         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1718         switch (gcw.protocol) {
1719                 case 0: case 1: sprintf(buffer, "ATA");break;
1720                 case 2: sprintf(buffer, "ATAPI");break;
1721                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1722         }
1723         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1724         switch (gcw.device_type) {
1725                 case 0: sprintf(buffer, "Direct-access Device");break;
1726                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1727                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1728                 case 5: sprintf(buffer, "CD-ROM Device");break;
1729                 case 6: sprintf(buffer, "Reserved");
1730                 case 7: sprintf(buffer, "Optical memory Device");break;
1731                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1732                 default: sprintf(buffer, "Reserved");
1733         }
1734         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1735         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No"); 
1736         switch (gcw.drq_type) {
1737                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1738                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1739                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1740                 case 3: sprintf(buffer, "Reserved");break;
1741         }
1742         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1743         switch (gcw.packet_size) {
1744                 case 0: sprintf(buffer, "12 bytes");break;
1745                 case 1: sprintf(buffer, "16 bytes");break;
1746                 default: sprintf(buffer, "Reserved");break;
1747         }
1748         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1749         printk(KERN_INFO "Model: %.40s\n",id->model);
1750         printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1751         printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1752         printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1753         printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1754         printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1755         printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1756         printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1757         printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1758         printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1759         printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1760         printk(KERN_INFO "Single Word DMA supported modes:\n");
1761         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1762                 if (id->dma_1word & mask)
1763                         printk(KERN_INFO "   Mode %d%s\n", i,
1764                         (id->dma_1word & (mask << 8)) ? " (active)" : "");
1765         }
1766         printk(KERN_INFO "Multi Word DMA supported modes:\n");
1767         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1768                 if (id->dma_mword & mask)
1769                         printk(KERN_INFO "   Mode %d%s\n", i,
1770                         (id->dma_mword & (mask << 8)) ? " (active)" : "");
1771         }
1772         if (id->field_valid & 0x0002) {
1773                 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1774                         id->eide_pio_modes & 1 ? "Mode 3":"None");
1775                 if (id->eide_dma_min == 0)
1776                         sprintf(buffer, "Not supported");
1777                 else
1778                         sprintf(buffer, "%d ns",id->eide_dma_min);
1779                 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1780                 if (id->eide_dma_time == 0)
1781                         sprintf(buffer, "Not supported");
1782                 else
1783                         sprintf(buffer, "%d ns",id->eide_dma_time);
1784                 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1785                 if (id->eide_pio == 0)
1786                         sprintf(buffer, "Not supported");
1787                 else
1788                         sprintf(buffer, "%d ns",id->eide_pio);
1789                 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1790                         buffer);
1791                 if (id->eide_pio_iordy == 0)
1792                         sprintf(buffer, "Not supported");
1793                 else
1794                         sprintf(buffer, "%d ns",id->eide_pio_iordy);
1795                 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1796         } else
1797                 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1798 #endif /* IDEFLOPPY_DEBUG_INFO */
1799
1800         if (gcw.protocol != 2)
1801                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1802         else if (gcw.device_type != 0)
1803                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1804         else if (!gcw.removable)
1805                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1806         else if (gcw.drq_type == 3) {
1807                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1808         } else if (gcw.packet_size != 0) {
1809                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1810         } else
1811                 return 1;
1812         return 0;
1813 }
1814
1815 #ifdef CONFIG_IDE_PROC_FS
1816 static void idefloppy_add_settings(ide_drive_t *drive)
1817 {
1818         idefloppy_floppy_t *floppy = drive->driver_data;
1819
1820 /*
1821  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1822  */
1823         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1824         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1825         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1826         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1827 }
1828 #else
1829 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1830 #endif
1831
1832 /*
1833  *      Driver initialization.
1834  */
1835 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1836 {
1837         struct idefloppy_id_gcw gcw;
1838
1839         *((u16 *) &gcw) = drive->id->config;
1840         floppy->pc = floppy->pc_stack;
1841         if (gcw.drq_type == 1)
1842                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1843         /*
1844          *      We used to check revisions here. At this point however
1845          *      I'm giving up. Just assume they are all broken, its easier.
1846          *
1847          *      The actual reason for the workarounds was likely
1848          *      a driver bug after all rather than a firmware bug,
1849          *      and the workaround below used to hide it. It should
1850          *      be fixed as of version 1.9, but to be on the safe side
1851          *      we'll leave the limitation below for the 2.2.x tree.
1852          */
1853
1854         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1855                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1856                 /* This value will be visible in the /proc/ide/hdx/settings */
1857                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1858                 blk_queue_max_sectors(drive->queue, 64);
1859         }
1860
1861         /*
1862         *      Guess what?  The IOMEGA Clik! drive also needs the
1863         *      above fix.  It makes nasty clicking noises without
1864         *      it, so please don't remove this.
1865         */
1866         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1867                 blk_queue_max_sectors(drive->queue, 64);
1868                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1869         }
1870
1871
1872         (void) idefloppy_get_capacity(drive);
1873         idefloppy_add_settings(drive);
1874 }
1875
1876 static void ide_floppy_remove(ide_drive_t *drive)
1877 {
1878         idefloppy_floppy_t *floppy = drive->driver_data;
1879         struct gendisk *g = floppy->disk;
1880
1881         ide_proc_unregister_driver(drive, floppy->driver);
1882
1883         del_gendisk(g);
1884
1885         ide_floppy_put(floppy);
1886 }
1887
1888 static void ide_floppy_release(struct kref *kref)
1889 {
1890         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1891         ide_drive_t *drive = floppy->drive;
1892         struct gendisk *g = floppy->disk;
1893
1894         drive->driver_data = NULL;
1895         g->private_data = NULL;
1896         put_disk(g);
1897         kfree(floppy);
1898 }
1899
1900 #ifdef CONFIG_IDE_PROC_FS
1901 static int proc_idefloppy_read_capacity
1902         (char *page, char **start, off_t off, int count, int *eof, void *data)
1903 {
1904         ide_drive_t*drive = (ide_drive_t *)data;
1905         int len;
1906
1907         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1908         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1909 }
1910
1911 static ide_proc_entry_t idefloppy_proc[] = {
1912         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1913         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1914         { NULL, 0, NULL, NULL }
1915 };
1916 #endif  /* CONFIG_IDE_PROC_FS */
1917
1918 static int ide_floppy_probe(ide_drive_t *);
1919
1920 static ide_driver_t idefloppy_driver = {
1921         .gen_driver = {
1922                 .owner          = THIS_MODULE,
1923                 .name           = "ide-floppy",
1924                 .bus            = &ide_bus_type,
1925         },
1926         .probe                  = ide_floppy_probe,
1927         .remove                 = ide_floppy_remove,
1928         .version                = IDEFLOPPY_VERSION,
1929         .media                  = ide_floppy,
1930         .supports_dsc_overlap   = 0,
1931         .do_request             = idefloppy_do_request,
1932         .end_request            = idefloppy_do_end_request,
1933         .error                  = __ide_error,
1934         .abort                  = __ide_abort,
1935 #ifdef CONFIG_IDE_PROC_FS
1936         .proc                   = idefloppy_proc,
1937 #endif
1938 };
1939
1940 static int idefloppy_open(struct inode *inode, struct file *filp)
1941 {
1942         struct gendisk *disk = inode->i_bdev->bd_disk;
1943         struct ide_floppy_obj *floppy;
1944         ide_drive_t *drive;
1945         idefloppy_pc_t pc;
1946         int ret = 0;
1947
1948         debug_log(KERN_INFO "Reached idefloppy_open\n");
1949
1950         if (!(floppy = ide_floppy_get(disk)))
1951                 return -ENXIO;
1952
1953         drive = floppy->drive;
1954
1955         floppy->openers++;
1956
1957         if (floppy->openers == 1) {
1958                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1959                 /* Just in case */
1960
1961                 idefloppy_create_test_unit_ready_cmd(&pc);
1962                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1963                         idefloppy_create_start_stop_cmd(&pc, 1);
1964                         (void) idefloppy_queue_pc_tail(drive, &pc);
1965                 }
1966
1967                 if (idefloppy_get_capacity (drive)
1968                    && (filp->f_flags & O_NDELAY) == 0
1969                     /*
1970                     ** Allow O_NDELAY to open a drive without a disk, or with
1971                     ** an unreadable disk, so that we can get the format
1972                     ** capacity of the drive or begin the format - Sam
1973                     */
1974                     ) {
1975                         ret = -EIO;
1976                         goto out_put_floppy;
1977                 }
1978
1979                 if (floppy->wp && (filp->f_mode & 2)) {
1980                         ret = -EROFS;
1981                         goto out_put_floppy;
1982                 }
1983                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1984                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1985                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1986                         idefloppy_create_prevent_cmd(&pc, 1);
1987                         (void) idefloppy_queue_pc_tail(drive, &pc);
1988                 }
1989                 check_disk_change(inode->i_bdev);
1990         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1991                 ret = -EBUSY;
1992                 goto out_put_floppy;
1993         }
1994         return 0;
1995
1996 out_put_floppy:
1997         floppy->openers--;
1998         ide_floppy_put(floppy);
1999         return ret;
2000 }
2001
2002 static int idefloppy_release(struct inode *inode, struct file *filp)
2003 {
2004         struct gendisk *disk = inode->i_bdev->bd_disk;
2005         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2006         ide_drive_t *drive = floppy->drive;
2007         idefloppy_pc_t pc;
2008         
2009         debug_log(KERN_INFO "Reached idefloppy_release\n");
2010
2011         if (floppy->openers == 1) {
2012                 /* IOMEGA Clik! drives do not support lock/unlock commands */
2013                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2014                         idefloppy_create_prevent_cmd(&pc, 0);
2015                         (void) idefloppy_queue_pc_tail(drive, &pc);
2016                 }
2017
2018                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2019         }
2020
2021         floppy->openers--;
2022
2023         ide_floppy_put(floppy);
2024
2025         return 0;
2026 }
2027
2028 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
2029 {
2030         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2031         ide_drive_t *drive = floppy->drive;
2032
2033         geo->heads = drive->bios_head;
2034         geo->sectors = drive->bios_sect;
2035         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
2036         return 0;
2037 }
2038
2039 static int idefloppy_ioctl(struct inode *inode, struct file *file,
2040                         unsigned int cmd, unsigned long arg)
2041 {
2042         struct block_device *bdev = inode->i_bdev;
2043         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2044         ide_drive_t *drive = floppy->drive;
2045         void __user *argp = (void __user *)arg;
2046         int err;
2047         int prevent = (arg) ? 1 : 0;
2048         idefloppy_pc_t pc;
2049
2050         switch (cmd) {
2051         case CDROMEJECT:
2052                 prevent = 0;
2053                 /* fall through */
2054         case CDROM_LOCKDOOR:
2055                 if (floppy->openers > 1)
2056                         return -EBUSY;
2057
2058                 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2059                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2060                         idefloppy_create_prevent_cmd(&pc, prevent);
2061                         (void) idefloppy_queue_pc_tail(drive, &pc);
2062                 }
2063                 if (cmd == CDROMEJECT) {
2064                         idefloppy_create_start_stop_cmd(&pc, 2);
2065                         (void) idefloppy_queue_pc_tail(drive, &pc);
2066                 }
2067                 return 0;
2068         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2069                 return 0;
2070         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2071                 return idefloppy_get_format_capacities(drive, argp);
2072         case IDEFLOPPY_IOCTL_FORMAT_START:
2073
2074                 if (!(file->f_mode & 2))
2075                         return -EPERM;
2076
2077                 if (floppy->openers > 1) {
2078                         /* Don't format if someone is using the disk */
2079
2080                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2081                                   &floppy->flags);
2082                         return -EBUSY;
2083                 }
2084
2085                 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2086
2087                 err = idefloppy_begin_format(drive, argp);
2088                 if (err)
2089                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2090                 return err;
2091                 /*
2092                 ** Note, the bit will be cleared when the device is
2093                 ** closed.  This is the cleanest way to handle the
2094                 ** situation where the drive does not support
2095                 ** format progress reporting.
2096                 */
2097         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2098                 return idefloppy_get_format_progress(drive, argp);
2099         }
2100
2101         /*
2102          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
2103          * and CDROM_SEND_PACKET (legacy) ioctls
2104          */
2105         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
2106                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
2107                                         bdev->bd_disk, cmd, argp);
2108         else
2109                 err = -ENOTTY;
2110
2111         if (err == -ENOTTY)
2112                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
2113
2114         return err;
2115 }
2116
2117 static int idefloppy_media_changed(struct gendisk *disk)
2118 {
2119         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2120         ide_drive_t *drive = floppy->drive;
2121
2122         /* do not scan partitions twice if this is a removable device */
2123         if (drive->attach) {
2124                 drive->attach = 0;
2125                 return 0;
2126         }
2127         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2128 }
2129
2130 static int idefloppy_revalidate_disk(struct gendisk *disk)
2131 {
2132         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2133         set_capacity(disk, idefloppy_capacity(floppy->drive));
2134         return 0;
2135 }
2136
2137 static struct block_device_operations idefloppy_ops = {
2138         .owner          = THIS_MODULE,
2139         .open           = idefloppy_open,
2140         .release        = idefloppy_release,
2141         .ioctl          = idefloppy_ioctl,
2142         .getgeo         = idefloppy_getgeo,
2143         .media_changed  = idefloppy_media_changed,
2144         .revalidate_disk= idefloppy_revalidate_disk
2145 };
2146
2147 static int ide_floppy_probe(ide_drive_t *drive)
2148 {
2149         idefloppy_floppy_t *floppy;
2150         struct gendisk *g;
2151
2152         if (!strstr("ide-floppy", drive->driver_req))
2153                 goto failed;
2154         if (!drive->present)
2155                 goto failed;
2156         if (drive->media != ide_floppy)
2157                 goto failed;
2158         if (!idefloppy_identify_device (drive, drive->id)) {
2159                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2160                 goto failed;
2161         }
2162         if (drive->scsi) {
2163                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2164                 goto failed;
2165         }
2166         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2167                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2168                 goto failed;
2169         }
2170
2171         g = alloc_disk(1 << PARTN_BITS);
2172         if (!g)
2173                 goto out_free_floppy;
2174
2175         ide_init_disk(g, drive);
2176
2177         ide_proc_register_driver(drive, &idefloppy_driver);
2178
2179         kref_init(&floppy->kref);
2180
2181         floppy->drive = drive;
2182         floppy->driver = &idefloppy_driver;
2183         floppy->disk = g;
2184
2185         g->private_data = &floppy->driver;
2186
2187         drive->driver_data = floppy;
2188
2189         idefloppy_setup (drive, floppy);
2190
2191         g->minors = 1 << PARTN_BITS;
2192         g->driverfs_dev = &drive->gendev;
2193         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2194         g->fops = &idefloppy_ops;
2195         drive->attach = 1;
2196         add_disk(g);
2197         return 0;
2198
2199 out_free_floppy:
2200         kfree(floppy);
2201 failed:
2202         return -ENODEV;
2203 }
2204
2205 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2206
2207 static void __exit idefloppy_exit (void)
2208 {
2209         driver_unregister(&idefloppy_driver.gen_driver);
2210 }
2211
2212 static int __init idefloppy_init(void)
2213 {
2214         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2215         return driver_register(&idefloppy_driver.gen_driver);
2216 }
2217
2218 MODULE_ALIAS("ide:*m-floppy*");
2219 module_init(idefloppy_init);
2220 module_exit(idefloppy_exit);
2221 MODULE_LICENSE("GPL");