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