ide: remove atapi_ireason_t (take 3)
[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 /*
373  *      Error codes which are returned in rq->errors to the higher part
374  *      of the driver.
375  */
376 #define IDEFLOPPY_ERROR_GENERAL         101
377
378 /*
379  *      The following is used to format the general configuration word of
380  *      the ATAPI IDENTIFY DEVICE command.
381  */
382 struct idefloppy_id_gcw {       
383 #if defined(__LITTLE_ENDIAN_BITFIELD)
384         unsigned packet_size            :2;     /* Packet Size */
385         unsigned reserved234            :3;     /* Reserved */
386         unsigned drq_type               :2;     /* Command packet DRQ type */
387         unsigned removable              :1;     /* Removable media */
388         unsigned device_type            :5;     /* Device type */
389         unsigned reserved13             :1;     /* Reserved */
390         unsigned protocol               :2;     /* Protocol type */
391 #elif defined(__BIG_ENDIAN_BITFIELD)
392         unsigned protocol               :2;     /* Protocol type */
393         unsigned reserved13             :1;     /* Reserved */
394         unsigned device_type            :5;     /* Device type */
395         unsigned removable              :1;     /* Removable media */
396         unsigned drq_type               :2;     /* Command packet DRQ type */
397         unsigned reserved234            :3;     /* Reserved */
398         unsigned packet_size            :2;     /* Packet Size */
399 #else
400 #error "Bitfield endianness not defined! Check your byteorder.h"
401 #endif
402 };
403
404 /*
405  *      INQUIRY packet command - Data Format
406  */
407 typedef struct {
408 #if defined(__LITTLE_ENDIAN_BITFIELD)
409         unsigned        device_type     :5;     /* Peripheral Device Type */
410         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
411         unsigned        reserved1_6t0   :7;     /* Reserved */
412         unsigned        rmb             :1;     /* Removable Medium Bit */
413         unsigned        ansi_version    :3;     /* ANSI Version */
414         unsigned        ecma_version    :3;     /* ECMA Version */
415         unsigned        iso_version     :2;     /* ISO Version */
416         unsigned        response_format :4;     /* Response Data Format */
417         unsigned        reserved3_45    :2;     /* Reserved */
418         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
419         unsigned        reserved3_7     :1;     /* AENC - Reserved */
420 #elif defined(__BIG_ENDIAN_BITFIELD)
421         unsigned        reserved0_765   :3;     /* Peripheral Qualifier - Reserved */
422         unsigned        device_type     :5;     /* Peripheral Device Type */
423         unsigned        rmb             :1;     /* Removable Medium Bit */
424         unsigned        reserved1_6t0   :7;     /* Reserved */
425         unsigned        iso_version     :2;     /* ISO Version */
426         unsigned        ecma_version    :3;     /* ECMA Version */
427         unsigned        ansi_version    :3;     /* ANSI Version */
428         unsigned        reserved3_7     :1;     /* AENC - Reserved */
429         unsigned        reserved3_6     :1;     /* TrmIOP - Reserved */
430         unsigned        reserved3_45    :2;     /* Reserved */
431         unsigned        response_format :4;     /* Response Data Format */
432 #else
433 #error "Bitfield endianness not defined! Check your byteorder.h"
434 #endif
435         u8              additional_length;      /* Additional Length (total_length-4) */
436         u8              rsv5, rsv6, rsv7;       /* Reserved */
437         u8              vendor_id[8];           /* Vendor Identification */
438         u8              product_id[16];         /* Product Identification */
439         u8              revision_level[4];      /* Revision Level */
440         u8              vendor_specific[20];    /* Vendor Specific - Optional */
441         u8              reserved56t95[40];      /* Reserved - Optional */
442                                                 /* Additional information may be returned */
443 } idefloppy_inquiry_result_t;
444
445 /*
446  *      REQUEST SENSE packet command result - Data Format.
447  */
448 typedef struct {
449 #if defined(__LITTLE_ENDIAN_BITFIELD)
450         unsigned        error_code      :7;     /* Current error (0x70) */
451         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
452         u8              reserved1       :8;     /* Reserved */
453         unsigned        sense_key       :4;     /* Sense Key */
454         unsigned        reserved2_4     :1;     /* Reserved */
455         unsigned        ili             :1;     /* Incorrect Length Indicator */
456         unsigned        reserved2_67    :2;
457 #elif defined(__BIG_ENDIAN_BITFIELD)
458         unsigned        valid           :1;     /* The information field conforms to SFF-8070i */
459         unsigned        error_code      :7;     /* Current error (0x70) */
460         u8              reserved1       :8;     /* Reserved */
461         unsigned        reserved2_67    :2;
462         unsigned        ili             :1;     /* Incorrect Length Indicator */
463         unsigned        reserved2_4     :1;     /* Reserved */
464         unsigned        sense_key       :4;     /* Sense Key */
465 #else
466 #error "Bitfield endianness not defined! Check your byteorder.h"
467 #endif
468         u32             information __attribute__ ((packed));
469         u8              asl;                    /* Additional sense length (n-7) */
470         u32             command_specific;       /* Additional command specific information */
471         u8              asc;                    /* Additional Sense Code */
472         u8              ascq;                   /* Additional Sense Code Qualifier */
473         u8              replaceable_unit_code;  /* Field Replaceable Unit Code */
474         u8              sksv[3];
475         u8              pad[2];                 /* Padding to 20 bytes */
476 } idefloppy_request_sense_result_t;
477
478 /*
479  *      Pages of the SELECT SENSE / MODE SENSE packet commands.
480  */
481 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
482 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
483
484 /*
485  *      Mode Parameter Header for the MODE SENSE packet command
486  */
487 typedef struct {
488         u16             mode_data_length;       /* Length of the following data transfer */
489         u8              medium_type;            /* Medium Type */
490 #if defined(__LITTLE_ENDIAN_BITFIELD)
491         unsigned        reserved3       :7;
492         unsigned        wp              :1;     /* Write protect */
493 #elif defined(__BIG_ENDIAN_BITFIELD)
494         unsigned        wp              :1;     /* Write protect */
495         unsigned        reserved3       :7;
496 #else
497 #error "Bitfield endianness not defined! Check your byteorder.h"
498 #endif
499         u8              reserved[4];
500 } idefloppy_mode_parameter_header_t;
501
502 static DEFINE_MUTEX(idefloppy_ref_mutex);
503
504 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
505
506 #define ide_floppy_g(disk) \
507         container_of((disk)->private_data, struct ide_floppy_obj, driver)
508
509 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
510 {
511         struct ide_floppy_obj *floppy = NULL;
512
513         mutex_lock(&idefloppy_ref_mutex);
514         floppy = ide_floppy_g(disk);
515         if (floppy)
516                 kref_get(&floppy->kref);
517         mutex_unlock(&idefloppy_ref_mutex);
518         return floppy;
519 }
520
521 static void ide_floppy_release(struct kref *);
522
523 static void ide_floppy_put(struct ide_floppy_obj *floppy)
524 {
525         mutex_lock(&idefloppy_ref_mutex);
526         kref_put(&floppy->kref, ide_floppy_release);
527         mutex_unlock(&idefloppy_ref_mutex);
528 }
529
530 /*
531  *      Too bad. The drive wants to send us data which we are not ready to accept.
532  *      Just throw it away.
533  */
534 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
535 {
536         while (bcount--)
537                 (void) HWIF(drive)->INB(IDE_DATA_REG);
538 }
539
540 #if IDEFLOPPY_DEBUG_BUGS
541 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
542 {
543         while (bcount--)
544                 HWIF(drive)->OUTB(0, IDE_DATA_REG);
545 }
546 #endif /* IDEFLOPPY_DEBUG_BUGS */
547
548
549 /*
550  *      idefloppy_do_end_request is used to finish servicing a request.
551  *
552  *      For read/write requests, we will call ide_end_request to pass to the
553  *      next buffer.
554  */
555 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
556 {
557         idefloppy_floppy_t *floppy = drive->driver_data;
558         struct request *rq = HWGROUP(drive)->rq;
559         int error;
560
561         debug_log(KERN_INFO "Reached idefloppy_end_request\n");
562
563         switch (uptodate) {
564                 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
565                 case 1: error = 0; break;
566                 default: error = uptodate;
567         }
568         if (error)
569                 floppy->failed_pc = NULL;
570         /* Why does this happen? */
571         if (!rq)
572                 return 0;
573         if (!blk_special_request(rq)) {
574                 /* our real local end request function */
575                 ide_end_request(drive, uptodate, nsecs);
576                 return 0;
577         }
578         rq->errors = error;
579         /* fixme: need to move this local also */
580         ide_end_drive_cmd(drive, 0, 0);
581         return 0;
582 }
583
584 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
585 {
586         struct request *rq = pc->rq;
587         struct bio_vec *bvec;
588         struct req_iterator iter;
589         unsigned long flags;
590         char *data;
591         int count, done = 0;
592
593         rq_for_each_segment(bvec, rq, iter) {
594                 if (!bcount)
595                         break;
596
597                 count = min(bvec->bv_len, bcount);
598
599                 data = bvec_kmap_irq(bvec, &flags);
600                 drive->hwif->atapi_input_bytes(drive, data, count);
601                 bvec_kunmap_irq(data, &flags);
602
603                 bcount -= count;
604                 pc->b_count += count;
605                 done += count;
606         }
607
608         idefloppy_do_end_request(drive, 1, done >> 9);
609
610         if (bcount) {
611                 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
612                 idefloppy_discard_data(drive, bcount);
613         }
614 }
615
616 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
617 {
618         struct request *rq = pc->rq;
619         struct req_iterator iter;
620         struct bio_vec *bvec;
621         unsigned long flags;
622         int count, done = 0;
623         char *data;
624
625         rq_for_each_segment(bvec, rq, iter) {
626                 if (!bcount)
627                         break;
628
629                 count = min(bvec->bv_len, bcount);
630
631                 data = bvec_kmap_irq(bvec, &flags);
632                 drive->hwif->atapi_output_bytes(drive, data, count);
633                 bvec_kunmap_irq(data, &flags);
634
635                 bcount -= count;
636                 pc->b_count += count;
637                 done += count;
638         }
639
640         idefloppy_do_end_request(drive, 1, done >> 9);
641
642 #if IDEFLOPPY_DEBUG_BUGS
643         if (bcount) {
644                 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
645                 idefloppy_write_zeros(drive, bcount);
646         }
647 #endif
648 }
649
650 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
651 {
652         struct request *rq = pc->rq;
653         struct bio *bio = rq->bio;
654
655         while ((bio = rq->bio) != NULL)
656                 idefloppy_do_end_request(drive, 1, 0);
657 }
658
659 /*
660  *      idefloppy_queue_pc_head generates a new packet command request in front
661  *      of the request queue, before the current request, so that it will be
662  *      processed immediately, on the next pass through the driver.
663  */
664 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
665 {
666         struct ide_floppy_obj *floppy = drive->driver_data;
667
668         ide_init_drive_cmd(rq);
669         rq->buffer = (char *) pc;
670         rq->cmd_type = REQ_TYPE_SPECIAL;
671         rq->rq_disk = floppy->disk;
672         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
673 }
674
675 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
676 {
677         idefloppy_floppy_t *floppy = drive->driver_data;
678
679         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
680                 floppy->pc_stack_index=0;
681         return (&floppy->pc_stack[floppy->pc_stack_index++]);
682 }
683
684 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
685 {
686         idefloppy_floppy_t *floppy = drive->driver_data;
687
688         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
689                 floppy->rq_stack_index = 0;
690         return (&floppy->rq_stack[floppy->rq_stack_index++]);
691 }
692
693 /*
694  *      idefloppy_analyze_error is called on each failed packet command retry
695  *      to analyze the request sense.
696  */
697 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
698 {
699         idefloppy_floppy_t *floppy = drive->driver_data;
700
701         floppy->sense_key = result->sense_key;
702         floppy->asc = result->asc;
703         floppy->ascq = result->ascq;
704         floppy->progress_indication = result->sksv[0] & 0x80 ?
705                 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
706         if (floppy->failed_pc)
707                 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
708                         "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
709                         result->sense_key, result->asc, result->ascq);
710         else
711                 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
712                         "ascq = %x\n", result->sense_key,
713                         result->asc, result->ascq);
714 }
715
716 static void idefloppy_request_sense_callback (ide_drive_t *drive)
717 {
718         idefloppy_floppy_t *floppy = drive->driver_data;
719
720         debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
721         
722         if (!floppy->pc->error) {
723                 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
724                 idefloppy_do_end_request(drive, 1, 0);
725         } else {
726                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
727                 idefloppy_do_end_request(drive, 0, 0);
728         }
729 }
730
731 /*
732  *      General packet command callback function.
733  */
734 static void idefloppy_pc_callback (ide_drive_t *drive)
735 {
736         idefloppy_floppy_t *floppy = drive->driver_data;
737         
738         debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
739
740         idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
741 }
742
743 /*
744  *      idefloppy_init_pc initializes a packet command.
745  */
746 static void idefloppy_init_pc (idefloppy_pc_t *pc)
747 {
748         memset(pc->c, 0, 12);
749         pc->retries = 0;
750         pc->flags = 0;
751         pc->request_transfer = 0;
752         pc->buffer = pc->pc_buffer;
753         pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
754         pc->callback = &idefloppy_pc_callback;
755 }
756
757 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
758 {
759         idefloppy_init_pc(pc);  
760         pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
761         pc->c[4] = 255;
762         pc->request_transfer = 18;
763         pc->callback = &idefloppy_request_sense_callback;
764 }
765
766 /*
767  *      idefloppy_retry_pc is called when an error was detected during the
768  *      last packet command. We queue a request sense packet command in
769  *      the head of the request list.
770  */
771 static void idefloppy_retry_pc (ide_drive_t *drive)
772 {
773         idefloppy_pc_t *pc;
774         struct request *rq;
775
776         (void)drive->hwif->INB(IDE_ERROR_REG);
777         pc = idefloppy_next_pc_storage(drive);
778         rq = idefloppy_next_rq_storage(drive);
779         idefloppy_create_request_sense_cmd(pc);
780         idefloppy_queue_pc_head(drive, pc, rq);
781 }
782
783 /*
784  *      idefloppy_pc_intr is the usual interrupt handler which will be called
785  *      during a packet command.
786  */
787 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
788 {
789         idefloppy_floppy_t *floppy = drive->driver_data;
790         ide_hwif_t *hwif = drive->hwif;
791         idefloppy_pc_t *pc = floppy->pc;
792         struct request *rq = pc->rq;
793         unsigned int temp;
794         u16 bcount;
795         u8 stat, ireason;
796
797         debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
798                 __FUNCTION__);
799
800         if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
801                 if (HWIF(drive)->ide_dma_end(drive)) {
802                         set_bit(PC_DMA_ERROR, &pc->flags);
803                 } else {
804                         pc->actually_transferred = pc->request_transfer;
805                         idefloppy_update_buffers(drive, pc);
806                 }
807                 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
808         }
809
810         /* Clear the interrupt */
811         stat = drive->hwif->INB(IDE_STATUS_REG);
812
813         if ((stat & DRQ_STAT) == 0) {           /* No more interrupts */
814                 debug_log(KERN_INFO "Packet command completed, %d bytes "
815                         "transferred\n", pc->actually_transferred);
816                 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
817
818                 local_irq_enable_in_hardirq();
819
820                 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
821                         /* Error detected */
822                         debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
823                                 drive->name);
824                         rq->errors++;
825                         if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
826                                 printk(KERN_ERR "ide-floppy: I/O error in "
827                                         "request sense command\n");
828                                 return ide_do_reset(drive);
829                         }
830                         /* Retry operation */
831                         idefloppy_retry_pc(drive);
832                         /* queued, but not started */
833                         return ide_stopped;
834                 }
835                 pc->error = 0;
836                 if (floppy->failed_pc == pc)
837                         floppy->failed_pc = NULL;
838                 /* Command finished - Call the callback function */
839                 pc->callback(drive);
840                 return ide_stopped;
841         }
842
843         if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
844                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
845                         "more interrupts in DMA mode\n");
846                 ide_dma_off(drive);
847                 return ide_do_reset(drive);
848         }
849
850         /* Get the number of bytes to transfer */
851         bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
852                   hwif->INB(IDE_BCOUNTL_REG);
853         /* on this interrupt */
854         ireason = hwif->INB(IDE_IREASON_REG);
855
856         if (ireason & CD) {
857                 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
858                 return ide_do_reset(drive);
859         }
860         if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
861                 /* Hopefully, we will never get here */
862                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
863                                 (ireason & IO) ? "Write" : "Read");
864                 printk(KERN_ERR "but the floppy wants us to %s !\n",
865                                 (ireason & IO) ? "Read" : "Write");
866                 return ide_do_reset(drive);
867         }
868         if (!test_bit(PC_WRITING, &pc->flags)) {
869                 /* Reading - Check that we have enough space */
870                 temp = pc->actually_transferred + bcount;
871                 if (temp > pc->request_transfer) {
872                         if (temp > pc->buffer_size) {
873                                 printk(KERN_ERR "ide-floppy: The floppy wants "
874                                         "to send us more data than expected "
875                                         "- discarding data\n");
876                                 idefloppy_discard_data(drive, bcount);
877                                 BUG_ON(HWGROUP(drive)->handler != NULL);
878                                 ide_set_handler(drive,
879                                                 &idefloppy_pc_intr,
880                                                 IDEFLOPPY_WAIT_CMD,
881                                                 NULL);
882                                 return ide_started;
883                         }
884                         debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
885                                 "send us more data than expected - "
886                                 "allowing transfer\n");
887                 }
888         }
889         if (test_bit(PC_WRITING, &pc->flags)) {
890                 if (pc->buffer != NULL)
891                         /* Write the current buffer */
892                         hwif->atapi_output_bytes(drive, pc->current_position,
893                                                  bcount);
894                 else
895                         idefloppy_output_buffers(drive, pc, bcount);
896         } else {
897                 if (pc->buffer != NULL)
898                         /* Read the current buffer */
899                         hwif->atapi_input_bytes(drive, pc->current_position,
900                                                 bcount);
901                 else
902                         idefloppy_input_buffers(drive, pc, bcount);
903         }
904         /* Update the current position */
905         pc->actually_transferred += bcount;
906         pc->current_position += bcount;
907
908         BUG_ON(HWGROUP(drive)->handler != NULL);
909         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
910         return ide_started;
911 }
912
913 /*
914  * This is the original routine that did the packet transfer.
915  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
916  * for that drive below. The algorithm is chosen based on drive type
917  */
918 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
919 {
920         ide_startstop_t startstop;
921         idefloppy_floppy_t *floppy = drive->driver_data;
922         u8 ireason;
923
924         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
925                 printk(KERN_ERR "ide-floppy: Strange, packet command "
926                                 "initiated yet DRQ isn't asserted\n");
927                 return startstop;
928         }
929         ireason = drive->hwif->INB(IDE_IREASON_REG);
930         if ((ireason & CD) == 0 || (ireason & IO)) {
931                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
932                                 "issuing a packet command\n");
933                 return ide_do_reset(drive);
934         }
935         BUG_ON(HWGROUP(drive)->handler != NULL);
936         /* Set the interrupt routine */
937         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
938         /* Send the actual packet */
939         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
940         return ide_started;
941 }
942
943
944 /*
945  * What we have here is a classic case of a top half / bottom half
946  * interrupt service routine. In interrupt mode, the device sends
947  * an interrupt to signal it's ready to receive a packet. However,
948  * we need to delay about 2-3 ticks before issuing the packet or we
949  * gets in trouble.
950  *
951  * So, follow carefully. transfer_pc1 is called as an interrupt (or
952  * directly). In either case, when the device says it's ready for a 
953  * packet, we schedule the packet transfer to occur about 2-3 ticks
954  * later in transfer_pc2.
955  */
956 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
957 {
958         idefloppy_floppy_t *floppy = drive->driver_data;
959
960         /* Send the actual packet */
961         HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
962         /* Timeout for the packet command */
963         return IDEFLOPPY_WAIT_CMD;
964 }
965
966 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
967 {
968         idefloppy_floppy_t *floppy = drive->driver_data;
969         ide_startstop_t startstop;
970         u8 ireason;
971
972         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
973                 printk(KERN_ERR "ide-floppy: Strange, packet command "
974                                 "initiated yet DRQ isn't asserted\n");
975                 return startstop;
976         }
977         ireason = drive->hwif->INB(IDE_IREASON_REG);
978         if ((ireason & CD) == 0 || (ireason & IO)) {
979                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
980                                 "while issuing a packet command\n");
981                 return ide_do_reset(drive);
982         }
983         /* 
984          * The following delay solves a problem with ATAPI Zip 100 drives
985          * where the Busy flag was apparently being deasserted before the
986          * unit was ready to receive data. This was happening on a
987          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
988          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
989          * used until after the packet is moved in about 50 msec.
990          */
991         BUG_ON(HWGROUP(drive)->handler != NULL);
992         ide_set_handler(drive, 
993           &idefloppy_pc_intr,           /* service routine for packet command */
994           floppy->ticks,                /* wait this long before "failing" */
995           &idefloppy_transfer_pc2);     /* fail == transfer_pc2 */
996         return ide_started;
997 }
998
999 /**
1000  * idefloppy_should_report_error()
1001  *
1002  * Supresses error messages resulting from Medium not present
1003  */
1004 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1005 {
1006         if (floppy->sense_key == 0x02 &&
1007             floppy->asc       == 0x3a &&
1008             floppy->ascq      == 0x00)
1009                 return 0;
1010         return 1;
1011 }
1012
1013 /*
1014  *      Issue a packet command
1015  */
1016 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1017 {
1018         idefloppy_floppy_t *floppy = drive->driver_data;
1019         ide_hwif_t *hwif = drive->hwif;
1020         ide_handler_t *pkt_xfer_routine;
1021         u16 bcount;
1022         u8 dma;
1023
1024         if (floppy->failed_pc == NULL &&
1025             pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1026                 floppy->failed_pc = pc;
1027         /* Set the current packet command */
1028         floppy->pc = pc;
1029
1030         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1031             test_bit(PC_ABORT, &pc->flags)) {
1032                 /*
1033                  *      We will "abort" retrying a packet command in case
1034                  *      a legitimate error code was received.
1035                  */
1036                 if (!test_bit(PC_ABORT, &pc->flags)) {
1037                         if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1038                                 if (idefloppy_should_report_error(floppy))
1039                                         printk(KERN_ERR "ide-floppy: %s: I/O error, "
1040                                                "pc = %2x, key = %2x, "
1041                                                "asc = %2x, ascq = %2x\n",
1042                                                drive->name, pc->c[0],
1043                                                floppy->sense_key,
1044                                                floppy->asc, floppy->ascq);
1045                         }
1046                         /* Giving up */
1047                         pc->error = IDEFLOPPY_ERROR_GENERAL;
1048                 }
1049                 floppy->failed_pc = NULL;
1050                 pc->callback(drive);
1051                 return ide_stopped;
1052         }
1053
1054         debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1055
1056         pc->retries++;
1057         /* We haven't transferred any data yet */
1058         pc->actually_transferred = 0;
1059         pc->current_position = pc->buffer;
1060         bcount = min(pc->request_transfer, 63 * 1024);
1061
1062         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
1063                 ide_dma_off(drive);
1064
1065         dma = 0;
1066
1067         if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1068                 dma = !hwif->dma_setup(drive);
1069
1070         if (IDE_CONTROL_REG)
1071                 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1072         /* Use PIO/DMA */
1073         hwif->OUTB(dma, IDE_FEATURE_REG);
1074         hwif->OUTB((bcount >> 8) & 0xff, IDE_BCOUNTH_REG);
1075         hwif->OUTB(bcount & 0xff, IDE_BCOUNTL_REG);
1076         HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1077
1078         if (dma) {      /* Begin DMA, if necessary */
1079                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1080                 hwif->dma_start(drive);
1081         }
1082
1083         /* Can we transfer the packet when we get the interrupt or wait? */
1084         if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1085                 /* wait */
1086                 pkt_xfer_routine = &idefloppy_transfer_pc1;
1087         } else {
1088                 /* immediate */
1089                 pkt_xfer_routine = &idefloppy_transfer_pc;
1090         }
1091         
1092         if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1093                 /* Issue the packet command */
1094                 ide_execute_command(drive, WIN_PACKETCMD,
1095                                 pkt_xfer_routine,
1096                                 IDEFLOPPY_WAIT_CMD,
1097                                 NULL);
1098                 return ide_started;
1099         } else {
1100                 /* Issue the packet command */
1101                 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1102                 return (*pkt_xfer_routine) (drive);
1103         }
1104 }
1105
1106 static void idefloppy_rw_callback (ide_drive_t *drive)
1107 {
1108         debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1109
1110         idefloppy_do_end_request(drive, 1, 0);
1111         return;
1112 }
1113
1114 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1115 {
1116         debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1117                 "prevent = %d\n", prevent);
1118
1119         idefloppy_init_pc(pc);
1120         pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1121         pc->c[4] = prevent;
1122 }
1123
1124 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1125 {
1126         idefloppy_init_pc(pc);
1127         pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1128         pc->c[7] = 255;
1129         pc->c[8] = 255;
1130         pc->request_transfer = 255;
1131 }
1132
1133 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1134                                               int flags)
1135 {
1136         idefloppy_init_pc(pc);
1137         pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1138         pc->c[1] = 0x17;
1139
1140         memset(pc->buffer, 0, 12);
1141         pc->buffer[1] = 0xA2;
1142         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1143
1144         if (flags & 1)                          /* Verify bit on... */
1145                 pc->buffer[1] ^= 0x20;          /* ... turn off DCRT bit */
1146         pc->buffer[3] = 8;
1147
1148         put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1149         put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1150         pc->buffer_size=12;
1151         set_bit(PC_WRITING, &pc->flags);
1152 }
1153
1154 /*
1155  *      A mode sense command is used to "sense" floppy parameters.
1156  */
1157 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1158 {
1159         u16 length = sizeof(idefloppy_mode_parameter_header_t);
1160         
1161         idefloppy_init_pc(pc);
1162         pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1163         pc->c[1] = 0;
1164         pc->c[2] = page_code + (type << 6);
1165
1166         switch (page_code) {
1167                 case IDEFLOPPY_CAPABILITIES_PAGE:
1168                         length += 12;
1169                         break;
1170                 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1171                         length += 32;
1172                         break;
1173                 default:
1174                         printk(KERN_ERR "ide-floppy: unsupported page code "
1175                                 "in create_mode_sense_cmd\n");
1176         }
1177         put_unaligned(htons(length), (u16 *) &pc->c[7]);
1178         pc->request_transfer = length;
1179 }
1180
1181 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1182 {
1183         idefloppy_init_pc(pc);
1184         pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1185         pc->c[4] = start;
1186 }
1187
1188 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1189 {
1190         idefloppy_init_pc(pc);
1191         pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1192 }
1193
1194 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1195 {
1196         int block = sector / floppy->bs_factor;
1197         int blocks = rq->nr_sectors / floppy->bs_factor;
1198         int cmd = rq_data_dir(rq);
1199
1200         debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1201                 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1202                 block, blocks);
1203
1204         idefloppy_init_pc(pc);
1205         if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1206                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1207                 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1208         } else {
1209                 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1210                 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1211         }
1212         put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1213         pc->callback = &idefloppy_rw_callback;
1214         pc->rq = rq;
1215         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1216         if (rq->cmd_flags & REQ_RW)
1217                 set_bit(PC_WRITING, &pc->flags);
1218         pc->buffer = NULL;
1219         pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1220         set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1221 }
1222
1223 static void
1224 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1225 {
1226         idefloppy_init_pc(pc);
1227         pc->callback = &idefloppy_rw_callback;
1228         memcpy(pc->c, rq->cmd, sizeof(pc->c));
1229         pc->rq = rq;
1230         pc->b_count = rq->data_len;
1231         if (rq->data_len && rq_data_dir(rq) == WRITE)
1232                 set_bit(PC_WRITING, &pc->flags);
1233         pc->buffer = rq->data;
1234         if (rq->bio)
1235                 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1236                 
1237         /*
1238          * possibly problematic, doesn't look like ide-floppy correctly
1239          * handled scattered requests if dma fails...
1240          */
1241         pc->request_transfer = pc->buffer_size = rq->data_len;
1242 }
1243
1244 /*
1245  *      idefloppy_do_request is our request handling function.  
1246  */
1247 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1248 {
1249         idefloppy_floppy_t *floppy = drive->driver_data;
1250         idefloppy_pc_t *pc;
1251         unsigned long block = (unsigned long)block_s;
1252
1253         debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
1254                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
1255                         rq->flags, rq->errors);
1256         debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1257                         "current_nr_sectors: %d\n", (long)rq->sector,
1258                         rq->nr_sectors, rq->current_nr_sectors);
1259
1260         if (rq->errors >= ERROR_MAX) {
1261                 if (floppy->failed_pc != NULL) {
1262                         if (idefloppy_should_report_error(floppy))
1263                                 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1264                                        " key = %2x, asc = %2x, ascq = %2x\n",
1265                                        drive->name, floppy->failed_pc->c[0],
1266                                        floppy->sense_key, floppy->asc, floppy->ascq);
1267                 }
1268                 else
1269                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1270                                 drive->name);
1271                 idefloppy_do_end_request(drive, 0, 0);
1272                 return ide_stopped;
1273         }
1274         if (blk_fs_request(rq)) {
1275                 if (((long)rq->sector % floppy->bs_factor) ||
1276                     (rq->nr_sectors % floppy->bs_factor)) {
1277                         printk("%s: unsupported r/w request size\n",
1278                                 drive->name);
1279                         idefloppy_do_end_request(drive, 0, 0);
1280                         return ide_stopped;
1281                 }
1282                 pc = idefloppy_next_pc_storage(drive);
1283                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1284         } else if (blk_special_request(rq)) {
1285                 pc = (idefloppy_pc_t *) rq->buffer;
1286         } else if (blk_pc_request(rq)) {
1287                 pc = idefloppy_next_pc_storage(drive);
1288                 idefloppy_blockpc_cmd(floppy, pc, rq);
1289         } else {
1290                 blk_dump_rq_flags(rq,
1291                         "ide-floppy: unsupported command in queue");
1292                 idefloppy_do_end_request(drive, 0, 0);
1293                 return ide_stopped;
1294         }
1295
1296         pc->rq = rq;
1297         return idefloppy_issue_pc(drive, pc);
1298 }
1299
1300 /*
1301  *      idefloppy_queue_pc_tail adds a special packet command request to the
1302  *      tail of the request queue, and waits for it to be serviced.
1303  */
1304 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1305 {
1306         struct ide_floppy_obj *floppy = drive->driver_data;
1307         struct request rq;
1308
1309         ide_init_drive_cmd (&rq);
1310         rq.buffer = (char *) pc;
1311         rq.cmd_type = REQ_TYPE_SPECIAL;
1312         rq.rq_disk = floppy->disk;
1313
1314         return ide_do_drive_cmd(drive, &rq, ide_wait);
1315 }
1316
1317 /*
1318  *      Look at the flexible disk page parameters. We will ignore the CHS
1319  *      capacity parameters and use the LBA parameters instead.
1320  */
1321 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1322 {
1323         idefloppy_floppy_t *floppy = drive->driver_data;
1324         idefloppy_pc_t pc;
1325         idefloppy_mode_parameter_header_t *header;
1326         idefloppy_flexible_disk_page_t *page;
1327         int capacity, lba_capacity;
1328
1329         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1330         if (idefloppy_queue_pc_tail(drive,&pc)) {
1331                 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1332                         "page parameters\n");
1333                 return 1;
1334         }
1335         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1336         floppy->wp = header->wp;
1337         set_disk_ro(floppy->disk, floppy->wp);
1338         page = (idefloppy_flexible_disk_page_t *) (header + 1);
1339
1340         page->transfer_rate = ntohs(page->transfer_rate);
1341         page->sector_size = ntohs(page->sector_size);
1342         page->cyls = ntohs(page->cyls);
1343         page->rpm = ntohs(page->rpm);
1344         capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1345         if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1346                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1347                                 "%d sector size, %d rpm\n",
1348                         drive->name, capacity / 1024, page->cyls,
1349                         page->heads, page->sectors,
1350                         page->transfer_rate / 8, page->sector_size, page->rpm);
1351
1352         floppy->flexible_disk_page = *page;
1353         drive->bios_cyl = page->cyls;
1354         drive->bios_head = page->heads;
1355         drive->bios_sect = page->sectors;
1356         lba_capacity = floppy->blocks * floppy->block_size;
1357         if (capacity < lba_capacity) {
1358                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1359                         "bytes, but the drive only handles %d\n",
1360                         drive->name, lba_capacity, capacity);
1361                 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1362         }
1363         return 0;
1364 }
1365
1366 static int idefloppy_get_capability_page(ide_drive_t *drive)
1367 {
1368         idefloppy_floppy_t *floppy = drive->driver_data;
1369         idefloppy_pc_t pc;
1370         idefloppy_mode_parameter_header_t *header;
1371         idefloppy_capabilities_page_t *page;
1372
1373         floppy->srfp = 0;
1374         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1375                                                  MODE_SENSE_CURRENT);
1376
1377         set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1378         if (idefloppy_queue_pc_tail(drive,&pc)) {
1379                 return 1;
1380         }
1381
1382         header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1383         page= (idefloppy_capabilities_page_t *)(header+1);
1384         floppy->srfp = page->srfp;
1385         return (0);
1386 }
1387
1388 /*
1389  *      Determine if a media is present in the floppy drive, and if so,
1390  *      its LBA capacity.
1391  */
1392 static int idefloppy_get_capacity (ide_drive_t *drive)
1393 {
1394         idefloppy_floppy_t *floppy = drive->driver_data;
1395         idefloppy_pc_t pc;
1396         idefloppy_capacity_header_t *header;
1397         idefloppy_capacity_descriptor_t *descriptor;
1398         int i, descriptors, rc = 1, blocks, length;
1399         
1400         drive->bios_cyl = 0;
1401         drive->bios_head = drive->bios_sect = 0;
1402         floppy->blocks = 0;
1403         floppy->bs_factor = 1;
1404         set_capacity(floppy->disk, 0);
1405
1406         idefloppy_create_read_capacity_cmd(&pc);
1407         if (idefloppy_queue_pc_tail(drive, &pc)) {
1408                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1409                 return 1;
1410         }
1411         header = (idefloppy_capacity_header_t *) pc.buffer;
1412         descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1413         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1414
1415         for (i = 0; i < descriptors; i++, descriptor++) {
1416                 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1417                 length = descriptor->length = ntohs(descriptor->length);
1418
1419                 if (!i) 
1420                 {
1421                 switch (descriptor->dc) {
1422                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1423                 case CAPACITY_UNFORMATTED:
1424                         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1425                                 /*
1426                                  * If it is not a clik drive, break out
1427                                  * (maintains previous driver behaviour)
1428                                  */
1429                                 break;
1430                 case CAPACITY_CURRENT:
1431                         /* Normal Zip/LS-120 disks */
1432                         if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1433                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1434                                         "sector size\n", drive->name,
1435                                         blocks * length / 1024, blocks, length);
1436                         floppy->capacity = *descriptor;
1437                         if (!length || length % 512) {
1438                                 printk(KERN_NOTICE "%s: %d bytes block size "
1439                                         "not supported\n", drive->name, length);
1440                         } else {
1441                                 floppy->blocks = blocks;
1442                                 floppy->block_size = length;
1443                                 if ((floppy->bs_factor = length / 512) != 1)
1444                                         printk(KERN_NOTICE "%s: warning: non "
1445                                                 "512 bytes block size not "
1446                                                 "fully supported\n",
1447                                                 drive->name);
1448                                 rc = 0;
1449                         }
1450                         break;
1451                 case CAPACITY_NO_CARTRIDGE:
1452                         /*
1453                          * This is a KERN_ERR so it appears on screen
1454                          * for the user to see
1455                          */
1456                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1457                         break;
1458                 case CAPACITY_INVALID:
1459                         printk(KERN_ERR "%s: Invalid capacity for disk "
1460                                 "in drive\n", drive->name);
1461                         break;
1462                 }
1463                 }
1464                 if (!i) {
1465                         debug_log( "Descriptor 0 Code: %d\n",
1466                                 descriptor->dc);
1467                 }
1468                 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1469                         "sector size\n", i, blocks * length / 1024, blocks,
1470                         length);
1471         }
1472
1473         /* Clik! disk does not support get_flexible_disk_page */
1474         if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1475                 (void) idefloppy_get_flexible_disk_page(drive);
1476         }
1477
1478         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1479         return rc;
1480 }
1481
1482 /*
1483 ** Obtain the list of formattable capacities.
1484 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1485 ** descriptors to userland, instead of our own structures.
1486 **
1487 ** Userland gives us the following structure:
1488 **
1489 ** struct idefloppy_format_capacities {
1490 **        int nformats;
1491 **        struct {
1492 **                int nblocks;
1493 **                int blocksize;
1494 **                } formats[];
1495 **        } ;
1496 **
1497 ** userland initializes nformats to the number of allocated formats[]
1498 ** records.  On exit we set nformats to the number of records we've
1499 ** actually initialized.
1500 **
1501 */
1502
1503 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1504 {
1505         idefloppy_pc_t pc;
1506         idefloppy_capacity_header_t *header;
1507         idefloppy_capacity_descriptor_t *descriptor;
1508         int i, descriptors, blocks, length;
1509         int u_array_size;
1510         int u_index;
1511         int __user *argp;
1512
1513         if (get_user(u_array_size, arg))
1514                 return (-EFAULT);
1515
1516         if (u_array_size <= 0)
1517                 return (-EINVAL);
1518
1519         idefloppy_create_read_capacity_cmd(&pc);
1520         if (idefloppy_queue_pc_tail(drive, &pc)) {
1521                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1522                 return (-EIO);
1523         }
1524         header = (idefloppy_capacity_header_t *) pc.buffer;
1525         descriptors = header->length /
1526                 sizeof(idefloppy_capacity_descriptor_t);
1527         descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1528
1529         u_index = 0;
1530         argp = arg + 1;
1531
1532         /*
1533         ** We always skip the first capacity descriptor.  That's the
1534         ** current capacity.  We are interested in the remaining descriptors,
1535         ** the formattable capacities.
1536         */
1537
1538         for (i=0; i<descriptors; i++, descriptor++) {
1539                 if (u_index >= u_array_size)
1540                         break;  /* User-supplied buffer too small */
1541                 if (i == 0)
1542                         continue;       /* Skip the first descriptor */
1543
1544                 blocks = ntohl(descriptor->blocks);
1545                 length = ntohs(descriptor->length);
1546
1547                 if (put_user(blocks, argp))
1548                         return(-EFAULT);
1549                 ++argp;
1550
1551                 if (put_user(length, argp))
1552                         return (-EFAULT);
1553                 ++argp;
1554
1555                 ++u_index;
1556         }
1557
1558         if (put_user(u_index, arg))
1559                 return (-EFAULT);
1560         return (0);
1561 }
1562
1563 /*
1564 ** Send ATAPI_FORMAT_UNIT to the drive.
1565 **
1566 ** Userland gives us the following structure:
1567 **
1568 ** struct idefloppy_format_command {
1569 **        int nblocks;
1570 **        int blocksize;
1571 **        int flags;
1572 **        } ;
1573 **
1574 ** flags is a bitmask, currently, the only defined flag is:
1575 **
1576 **        0x01 - verify media after format.
1577 */
1578
1579 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1580 {
1581         int blocks;
1582         int length;
1583         int flags;
1584         idefloppy_pc_t pc;
1585
1586         if (get_user(blocks, arg) ||
1587             get_user(length, arg+1) ||
1588             get_user(flags, arg+2)) {
1589                 return (-EFAULT);
1590         }
1591
1592         /* Get the SFRP bit */
1593         (void) idefloppy_get_capability_page(drive);
1594         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1595         if (idefloppy_queue_pc_tail(drive, &pc)) {
1596                 return (-EIO);
1597         }
1598
1599         return (0);
1600 }
1601
1602 /*
1603 ** Get ATAPI_FORMAT_UNIT progress indication.
1604 **
1605 ** Userland gives a pointer to an int.  The int is set to a progress
1606 ** indicator 0-65536, with 65536=100%.
1607 **
1608 ** If the drive does not support format progress indication, we just check
1609 ** the dsc bit, and return either 0 or 65536.
1610 */
1611
1612 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1613 {
1614         idefloppy_floppy_t *floppy = drive->driver_data;
1615         idefloppy_pc_t pc;
1616         int progress_indication = 0x10000;
1617
1618         if (floppy->srfp) {
1619                 idefloppy_create_request_sense_cmd(&pc);
1620                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1621                         return (-EIO);
1622                 }
1623
1624                 if (floppy->sense_key == 2 &&
1625                     floppy->asc == 4 &&
1626                     floppy->ascq == 4) {
1627                         progress_indication = floppy->progress_indication;
1628                 }
1629                 /* Else assume format_unit has finished, and we're
1630                 ** at 0x10000 */
1631         } else {
1632                 unsigned long flags;
1633                 u8 stat;
1634
1635                 local_irq_save(flags);
1636                 stat = drive->hwif->INB(IDE_STATUS_REG);
1637                 local_irq_restore(flags);
1638
1639                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1640         }
1641         if (put_user(progress_indication, arg))
1642                 return (-EFAULT);
1643
1644         return (0);
1645 }
1646
1647 /*
1648  *      Return the current floppy capacity.
1649  */
1650 static sector_t idefloppy_capacity (ide_drive_t *drive)
1651 {
1652         idefloppy_floppy_t *floppy = drive->driver_data;
1653         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1654
1655         return capacity;
1656 }
1657
1658 /*
1659  *      idefloppy_identify_device checks if we can support a drive,
1660  *      based on the ATAPI IDENTIFY command results.
1661  */
1662 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1663 {
1664         struct idefloppy_id_gcw gcw;
1665 #if IDEFLOPPY_DEBUG_INFO
1666         u16 mask,i;
1667         char buffer[80];
1668 #endif /* IDEFLOPPY_DEBUG_INFO */
1669
1670         *((u16 *) &gcw) = id->config;
1671
1672 #ifdef CONFIG_PPC
1673         /* kludge for Apple PowerBook internal zip */
1674         if ((gcw.device_type == 5) &&
1675             !strstr(id->model, "CD-ROM") &&
1676             strstr(id->model, "ZIP"))
1677                 gcw.device_type = 0;                    
1678 #endif
1679
1680 #if IDEFLOPPY_DEBUG_INFO
1681         printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1682         switch (gcw.protocol) {
1683                 case 0: case 1: sprintf(buffer, "ATA");break;
1684                 case 2: sprintf(buffer, "ATAPI");break;
1685                 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1686         }
1687         printk(KERN_INFO "Protocol Type: %s\n", buffer);
1688         switch (gcw.device_type) {
1689                 case 0: sprintf(buffer, "Direct-access Device");break;
1690                 case 1: sprintf(buffer, "Streaming Tape Device");break;
1691                 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1692                 case 5: sprintf(buffer, "CD-ROM Device");break;
1693                 case 6: sprintf(buffer, "Reserved");
1694                 case 7: sprintf(buffer, "Optical memory Device");break;
1695                 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1696                 default: sprintf(buffer, "Reserved");
1697         }
1698         printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1699         printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No"); 
1700         switch (gcw.drq_type) {
1701                 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1702                 case 1: sprintf(buffer, "Interrupt DRQ");break;
1703                 case 2: sprintf(buffer, "Accelerated DRQ");break;
1704                 case 3: sprintf(buffer, "Reserved");break;
1705         }
1706         printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1707         switch (gcw.packet_size) {
1708                 case 0: sprintf(buffer, "12 bytes");break;
1709                 case 1: sprintf(buffer, "16 bytes");break;
1710                 default: sprintf(buffer, "Reserved");break;
1711         }
1712         printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1713         printk(KERN_INFO "Model: %.40s\n",id->model);
1714         printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1715         printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1716         printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1717         printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1718         printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1719         printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1720         printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1721         printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1722         printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1723         printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1724         printk(KERN_INFO "Single Word DMA supported modes:\n");
1725         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1726                 if (id->dma_1word & mask)
1727                         printk(KERN_INFO "   Mode %d%s\n", i,
1728                         (id->dma_1word & (mask << 8)) ? " (active)" : "");
1729         }
1730         printk(KERN_INFO "Multi Word DMA supported modes:\n");
1731         for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1732                 if (id->dma_mword & mask)
1733                         printk(KERN_INFO "   Mode %d%s\n", i,
1734                         (id->dma_mword & (mask << 8)) ? " (active)" : "");
1735         }
1736         if (id->field_valid & 0x0002) {
1737                 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1738                         id->eide_pio_modes & 1 ? "Mode 3":"None");
1739                 if (id->eide_dma_min == 0)
1740                         sprintf(buffer, "Not supported");
1741                 else
1742                         sprintf(buffer, "%d ns",id->eide_dma_min);
1743                 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1744                 if (id->eide_dma_time == 0)
1745                         sprintf(buffer, "Not supported");
1746                 else
1747                         sprintf(buffer, "%d ns",id->eide_dma_time);
1748                 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1749                 if (id->eide_pio == 0)
1750                         sprintf(buffer, "Not supported");
1751                 else
1752                         sprintf(buffer, "%d ns",id->eide_pio);
1753                 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1754                         buffer);
1755                 if (id->eide_pio_iordy == 0)
1756                         sprintf(buffer, "Not supported");
1757                 else
1758                         sprintf(buffer, "%d ns",id->eide_pio_iordy);
1759                 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1760         } else
1761                 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1762 #endif /* IDEFLOPPY_DEBUG_INFO */
1763
1764         if (gcw.protocol != 2)
1765                 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1766         else if (gcw.device_type != 0)
1767                 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1768         else if (!gcw.removable)
1769                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1770         else if (gcw.drq_type == 3) {
1771                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1772         } else if (gcw.packet_size != 0) {
1773                 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1774         } else
1775                 return 1;
1776         return 0;
1777 }
1778
1779 #ifdef CONFIG_IDE_PROC_FS
1780 static void idefloppy_add_settings(ide_drive_t *drive)
1781 {
1782         idefloppy_floppy_t *floppy = drive->driver_data;
1783
1784 /*
1785  *                      drive   setting name    read/write      data type       min     max     mul_factor      div_factor      data pointer            set function
1786  */
1787         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      1023,           1,              1,      &drive->bios_cyl,       NULL);
1788         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &drive->bios_head,      NULL);
1789         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,             1,              1,      &drive->bios_sect,      NULL);
1790         ide_add_setting(drive,  "ticks",        SETTING_RW,     TYPE_BYTE,      0,      255,            1,              1,      &floppy->ticks,         NULL);
1791 }
1792 #else
1793 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1794 #endif
1795
1796 /*
1797  *      Driver initialization.
1798  */
1799 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1800 {
1801         struct idefloppy_id_gcw gcw;
1802
1803         *((u16 *) &gcw) = drive->id->config;
1804         floppy->pc = floppy->pc_stack;
1805         if (gcw.drq_type == 1)
1806                 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1807         /*
1808          *      We used to check revisions here. At this point however
1809          *      I'm giving up. Just assume they are all broken, its easier.
1810          *
1811          *      The actual reason for the workarounds was likely
1812          *      a driver bug after all rather than a firmware bug,
1813          *      and the workaround below used to hide it. It should
1814          *      be fixed as of version 1.9, but to be on the safe side
1815          *      we'll leave the limitation below for the 2.2.x tree.
1816          */
1817
1818         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1819                 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1820                 /* This value will be visible in the /proc/ide/hdx/settings */
1821                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1822                 blk_queue_max_sectors(drive->queue, 64);
1823         }
1824
1825         /*
1826         *      Guess what?  The IOMEGA Clik! drive also needs the
1827         *      above fix.  It makes nasty clicking noises without
1828         *      it, so please don't remove this.
1829         */
1830         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1831                 blk_queue_max_sectors(drive->queue, 64);
1832                 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1833         }
1834
1835
1836         (void) idefloppy_get_capacity(drive);
1837         idefloppy_add_settings(drive);
1838 }
1839
1840 static void ide_floppy_remove(ide_drive_t *drive)
1841 {
1842         idefloppy_floppy_t *floppy = drive->driver_data;
1843         struct gendisk *g = floppy->disk;
1844
1845         ide_proc_unregister_driver(drive, floppy->driver);
1846
1847         del_gendisk(g);
1848
1849         ide_floppy_put(floppy);
1850 }
1851
1852 static void ide_floppy_release(struct kref *kref)
1853 {
1854         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1855         ide_drive_t *drive = floppy->drive;
1856         struct gendisk *g = floppy->disk;
1857
1858         drive->driver_data = NULL;
1859         g->private_data = NULL;
1860         put_disk(g);
1861         kfree(floppy);
1862 }
1863
1864 #ifdef CONFIG_IDE_PROC_FS
1865 static int proc_idefloppy_read_capacity
1866         (char *page, char **start, off_t off, int count, int *eof, void *data)
1867 {
1868         ide_drive_t*drive = (ide_drive_t *)data;
1869         int len;
1870
1871         len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1872         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1873 }
1874
1875 static ide_proc_entry_t idefloppy_proc[] = {
1876         { "capacity",   S_IFREG|S_IRUGO,        proc_idefloppy_read_capacity, NULL },
1877         { "geometry",   S_IFREG|S_IRUGO,        proc_ide_read_geometry, NULL },
1878         { NULL, 0, NULL, NULL }
1879 };
1880 #endif  /* CONFIG_IDE_PROC_FS */
1881
1882 static int ide_floppy_probe(ide_drive_t *);
1883
1884 static ide_driver_t idefloppy_driver = {
1885         .gen_driver = {
1886                 .owner          = THIS_MODULE,
1887                 .name           = "ide-floppy",
1888                 .bus            = &ide_bus_type,
1889         },
1890         .probe                  = ide_floppy_probe,
1891         .remove                 = ide_floppy_remove,
1892         .version                = IDEFLOPPY_VERSION,
1893         .media                  = ide_floppy,
1894         .supports_dsc_overlap   = 0,
1895         .do_request             = idefloppy_do_request,
1896         .end_request            = idefloppy_do_end_request,
1897         .error                  = __ide_error,
1898         .abort                  = __ide_abort,
1899 #ifdef CONFIG_IDE_PROC_FS
1900         .proc                   = idefloppy_proc,
1901 #endif
1902 };
1903
1904 static int idefloppy_open(struct inode *inode, struct file *filp)
1905 {
1906         struct gendisk *disk = inode->i_bdev->bd_disk;
1907         struct ide_floppy_obj *floppy;
1908         ide_drive_t *drive;
1909         idefloppy_pc_t pc;
1910         int ret = 0;
1911
1912         debug_log(KERN_INFO "Reached idefloppy_open\n");
1913
1914         if (!(floppy = ide_floppy_get(disk)))
1915                 return -ENXIO;
1916
1917         drive = floppy->drive;
1918
1919         floppy->openers++;
1920
1921         if (floppy->openers == 1) {
1922                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1923                 /* Just in case */
1924
1925                 idefloppy_create_test_unit_ready_cmd(&pc);
1926                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1927                         idefloppy_create_start_stop_cmd(&pc, 1);
1928                         (void) idefloppy_queue_pc_tail(drive, &pc);
1929                 }
1930
1931                 if (idefloppy_get_capacity (drive)
1932                    && (filp->f_flags & O_NDELAY) == 0
1933                     /*
1934                     ** Allow O_NDELAY to open a drive without a disk, or with
1935                     ** an unreadable disk, so that we can get the format
1936                     ** capacity of the drive or begin the format - Sam
1937                     */
1938                     ) {
1939                         ret = -EIO;
1940                         goto out_put_floppy;
1941                 }
1942
1943                 if (floppy->wp && (filp->f_mode & 2)) {
1944                         ret = -EROFS;
1945                         goto out_put_floppy;
1946                 }
1947                 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1948                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1949                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1950                         idefloppy_create_prevent_cmd(&pc, 1);
1951                         (void) idefloppy_queue_pc_tail(drive, &pc);
1952                 }
1953                 check_disk_change(inode->i_bdev);
1954         } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1955                 ret = -EBUSY;
1956                 goto out_put_floppy;
1957         }
1958         return 0;
1959
1960 out_put_floppy:
1961         floppy->openers--;
1962         ide_floppy_put(floppy);
1963         return ret;
1964 }
1965
1966 static int idefloppy_release(struct inode *inode, struct file *filp)
1967 {
1968         struct gendisk *disk = inode->i_bdev->bd_disk;
1969         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1970         ide_drive_t *drive = floppy->drive;
1971         idefloppy_pc_t pc;
1972         
1973         debug_log(KERN_INFO "Reached idefloppy_release\n");
1974
1975         if (floppy->openers == 1) {
1976                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1977                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1978                         idefloppy_create_prevent_cmd(&pc, 0);
1979                         (void) idefloppy_queue_pc_tail(drive, &pc);
1980                 }
1981
1982                 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1983         }
1984
1985         floppy->openers--;
1986
1987         ide_floppy_put(floppy);
1988
1989         return 0;
1990 }
1991
1992 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1993 {
1994         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1995         ide_drive_t *drive = floppy->drive;
1996
1997         geo->heads = drive->bios_head;
1998         geo->sectors = drive->bios_sect;
1999         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
2000         return 0;
2001 }
2002
2003 static int idefloppy_ioctl(struct inode *inode, struct file *file,
2004                         unsigned int cmd, unsigned long arg)
2005 {
2006         struct block_device *bdev = inode->i_bdev;
2007         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2008         ide_drive_t *drive = floppy->drive;
2009         void __user *argp = (void __user *)arg;
2010         int err;
2011         int prevent = (arg) ? 1 : 0;
2012         idefloppy_pc_t pc;
2013
2014         switch (cmd) {
2015         case CDROMEJECT:
2016                 prevent = 0;
2017                 /* fall through */
2018         case CDROM_LOCKDOOR:
2019                 if (floppy->openers > 1)
2020                         return -EBUSY;
2021
2022                 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2023                 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2024                         idefloppy_create_prevent_cmd(&pc, prevent);
2025                         (void) idefloppy_queue_pc_tail(drive, &pc);
2026                 }
2027                 if (cmd == CDROMEJECT) {
2028                         idefloppy_create_start_stop_cmd(&pc, 2);
2029                         (void) idefloppy_queue_pc_tail(drive, &pc);
2030                 }
2031                 return 0;
2032         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2033                 return 0;
2034         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2035                 return idefloppy_get_format_capacities(drive, argp);
2036         case IDEFLOPPY_IOCTL_FORMAT_START:
2037
2038                 if (!(file->f_mode & 2))
2039                         return -EPERM;
2040
2041                 if (floppy->openers > 1) {
2042                         /* Don't format if someone is using the disk */
2043
2044                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2045                                   &floppy->flags);
2046                         return -EBUSY;
2047                 }
2048
2049                 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2050
2051                 err = idefloppy_begin_format(drive, argp);
2052                 if (err)
2053                         clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2054                 return err;
2055                 /*
2056                 ** Note, the bit will be cleared when the device is
2057                 ** closed.  This is the cleanest way to handle the
2058                 ** situation where the drive does not support
2059                 ** format progress reporting.
2060                 */
2061         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2062                 return idefloppy_get_format_progress(drive, argp);
2063         }
2064
2065         /*
2066          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
2067          * and CDROM_SEND_PACKET (legacy) ioctls
2068          */
2069         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
2070                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
2071                                         bdev->bd_disk, cmd, argp);
2072         else
2073                 err = -ENOTTY;
2074
2075         if (err == -ENOTTY)
2076                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
2077
2078         return err;
2079 }
2080
2081 static int idefloppy_media_changed(struct gendisk *disk)
2082 {
2083         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2084         ide_drive_t *drive = floppy->drive;
2085
2086         /* do not scan partitions twice if this is a removable device */
2087         if (drive->attach) {
2088                 drive->attach = 0;
2089                 return 0;
2090         }
2091         return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2092 }
2093
2094 static int idefloppy_revalidate_disk(struct gendisk *disk)
2095 {
2096         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2097         set_capacity(disk, idefloppy_capacity(floppy->drive));
2098         return 0;
2099 }
2100
2101 static struct block_device_operations idefloppy_ops = {
2102         .owner          = THIS_MODULE,
2103         .open           = idefloppy_open,
2104         .release        = idefloppy_release,
2105         .ioctl          = idefloppy_ioctl,
2106         .getgeo         = idefloppy_getgeo,
2107         .media_changed  = idefloppy_media_changed,
2108         .revalidate_disk= idefloppy_revalidate_disk
2109 };
2110
2111 static int ide_floppy_probe(ide_drive_t *drive)
2112 {
2113         idefloppy_floppy_t *floppy;
2114         struct gendisk *g;
2115
2116         if (!strstr("ide-floppy", drive->driver_req))
2117                 goto failed;
2118         if (!drive->present)
2119                 goto failed;
2120         if (drive->media != ide_floppy)
2121                 goto failed;
2122         if (!idefloppy_identify_device (drive, drive->id)) {
2123                 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2124                 goto failed;
2125         }
2126         if (drive->scsi) {
2127                 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2128                 goto failed;
2129         }
2130         if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2131                 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2132                 goto failed;
2133         }
2134
2135         g = alloc_disk(1 << PARTN_BITS);
2136         if (!g)
2137                 goto out_free_floppy;
2138
2139         ide_init_disk(g, drive);
2140
2141         ide_proc_register_driver(drive, &idefloppy_driver);
2142
2143         kref_init(&floppy->kref);
2144
2145         floppy->drive = drive;
2146         floppy->driver = &idefloppy_driver;
2147         floppy->disk = g;
2148
2149         g->private_data = &floppy->driver;
2150
2151         drive->driver_data = floppy;
2152
2153         idefloppy_setup (drive, floppy);
2154
2155         g->minors = 1 << PARTN_BITS;
2156         g->driverfs_dev = &drive->gendev;
2157         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2158         g->fops = &idefloppy_ops;
2159         drive->attach = 1;
2160         add_disk(g);
2161         return 0;
2162
2163 out_free_floppy:
2164         kfree(floppy);
2165 failed:
2166         return -ENODEV;
2167 }
2168
2169 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2170
2171 static void __exit idefloppy_exit (void)
2172 {
2173         driver_unregister(&idefloppy_driver.gen_driver);
2174 }
2175
2176 static int __init idefloppy_init(void)
2177 {
2178         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2179         return driver_register(&idefloppy_driver.gen_driver);
2180 }
2181
2182 MODULE_ALIAS("ide:*m-floppy*");
2183 module_init(idefloppy_init);
2184 module_exit(idefloppy_exit);
2185 MODULE_LICENSE("GPL");