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Fix calculation in move_freepages_block for counting pages
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / ide / ide-floppy.c
blob04a357808f2e82a883770292bf00c5bd3e4f48cb
1 /*
2 * linux/drivers/ide/ide-floppy.c Version 0.99 Feb 24 2002
3 *
4 * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il>
5 * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net>
6 */
7
8 /*
9 * IDE ATAPI floppy driver.
10 *
11 * The driver currently doesn't have any fancy features, just the bare
12 * minimum read/write support.
13 *
14 * This driver supports the following IDE floppy drives:
15 *
16 * LS-120/240 SuperDisk
17 * Iomega Zip 100/250
18 * Iomega PC Card Clik!/PocketZip
19 *
20 * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many
21 * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive.
22 *
23 * Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c.
24 * Ver 0.2 Oct 31 96 Minor changes.
25 * Ver 0.3 Dec 2 96 Fixed error recovery bug.
26 * Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl.
27 * Ver 0.5 Feb 21 97 Add partitions support.
28 * Use the minimum of the LBA and CHS capacities.
29 * Avoid hwgroup->rq == NULL on the last irq.
30 * Fix potential null dereferencing with DEBUG_LOG.
31 * Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds.
32 * Add media write-protect detection.
33 * Issue START command only if TEST UNIT READY fails.
34 * Add work-around for IOMEGA ZIP revision 21.D.
35 * Remove idefloppy_get_capabilities().
36 * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of
37 * bytes requested on each interrupt to be zero.
38 * Thanks to <shanos@es.co.nz> for pointing this out.
39 * Ver 0.9.sv Jan 6 01 Sam Varshavchik <mrsam@courier-mta.com>
40 * Implement low level formatting. Reimplemented
41 * IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp
42 * bit. My LS-120 drive barfs on
43 * IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me.
44 * Compromise by not reporting a failure to get this
45 * mode page. Implemented four IOCTLs in order to
46 * implement formatting. IOCTls begin with 0x4600,
47 * 0x46 is 'F' as in Format.
48 * Jan 9 01 Userland option to select format verify.
49 * Added PC_SUPPRESS_ERROR flag - some idefloppy drives
50 * do not implement IDEFLOPPY_CAPABILITIES_PAGE, and
51 * return a sense error. Suppress error reporting in
52 * this particular case in order to avoid spurious
53 * errors in syslog. The culprit is
54 * idefloppy_get_capability_page(), so move it to
55 * idefloppy_begin_format() so that it's not used
56 * unless absolutely necessary.
57 * If drive does not support format progress indication
58 * monitor the dsc bit in the status register.
59 * Also, O_NDELAY on open will allow the device to be
60 * opened without a disk available. This can be used to
61 * open an unformatted disk, or get the device capacity.
62 * Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by
63 * <paul@paulbristow.net>
64 * Ver 0.92 Oct 22 00 Paul Bristow became official maintainer for this
65 * driver. Included Powerbook internal zip kludge.
66 * Ver 0.93 Oct 24 00 Fixed bugs for Clik! drive
67 * no disk on insert and disk change now works
68 * Ver 0.94 Oct 27 00 Tidied up to remove strstr(Clik) everywhere
69 * Ver 0.95 Nov 7 00 Brought across to kernel 2.4
70 * Ver 0.96 Jan 7 01 Actually in line with release version of 2.4.0
71 * including set_bit patch from Rusty Russell
72 * Ver 0.97 Jul 22 01 Merge 0.91-0.96 onto 0.9.sv for ac series
73 * Ver 0.97.sv Aug 3 01 Backported from 2.4.7-ac3
74 * Ver 0.98 Oct 26 01 Split idefloppy_transfer_pc into two pieces to
75 * fix a lost interrupt problem. It appears the busy
76 * bit was being deasserted by my IOMEGA ATAPI ZIP 100
77 * drive before the drive was actually ready.
78 * Ver 0.98a Oct 29 01 Expose delay value so we can play.
79 * Ver 0.99 Feb 24 02 Remove duplicate code, modify clik! detection code
80 * to support new PocketZip drives
81 */
82
83 #define IDEFLOPPY_VERSION "0.99.newide"
84
85 #include <linux/module.h>
86 #include <linux/types.h>
87 #include <linux/string.h>
88 #include <linux/kernel.h>
89 #include <linux/delay.h>
90 #include <linux/timer.h>
91 #include <linux/mm.h>
92 #include <linux/interrupt.h>
93 #include <linux/major.h>
94 #include <linux/errno.h>
95 #include <linux/genhd.h>
96 #include <linux/slab.h>
97 #include <linux/cdrom.h>
98 #include <linux/ide.h>
99 #include <linux/bitops.h>
100 #include <linux/mutex.h>
101
102 #include <scsi/scsi_ioctl.h>
103
104 #include <asm/byteorder.h>
105 #include <asm/irq.h>
106 #include <asm/uaccess.h>
107 #include <asm/io.h>
108 #include <asm/unaligned.h>
109
110 /*
111 * The following are used to debug the driver.
112 */
113 #define IDEFLOPPY_DEBUG_LOG 0
114 #define IDEFLOPPY_DEBUG_INFO 0
115 #define IDEFLOPPY_DEBUG_BUGS 1
116
117 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
118 #define IDEFLOPPY_DEBUG( fmt, args... )
119
120 #if IDEFLOPPY_DEBUG_LOG
121 #define debug_log printk
122 #else
123 #define debug_log(fmt, args... ) do {} while(0)
124 #endif
125
126
127 /*
128 * Some drives require a longer irq timeout.
129 */
130 #define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
131
132 /*
133 * After each failed packet command we issue a request sense command
134 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
135 */
136 #define IDEFLOPPY_MAX_PC_RETRIES 3
137
138 /*
139 * With each packet command, we allocate a buffer of
140 * IDEFLOPPY_PC_BUFFER_SIZE bytes.
141 */
142 #define IDEFLOPPY_PC_BUFFER_SIZE 256
143
144 /*
145 * In various places in the driver, we need to allocate storage
146 * for packet commands and requests, which will remain valid while
147 * we leave the driver to wait for an interrupt or a timeout event.
148 */
149 #define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
150
151 /*
152 * Our view of a packet command.
153 */
154 typedef struct idefloppy_packet_command_s {
155 u8 c[12]; /* Actual packet bytes */
156 int retries; /* On each retry, we increment retries */
157 int error; /* Error code */
158 int request_transfer; /* Bytes to transfer */
159 int actually_transferred; /* Bytes actually transferred */
160 int buffer_size; /* Size of our data buffer */
161 int b_count; /* Missing/Available data on the current buffer */
162 struct request *rq; /* The corresponding request */
163 u8 *buffer; /* Data buffer */
164 u8 *current_position; /* Pointer into the above buffer */
165 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */
166 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
167 unsigned long flags; /* Status/Action bit flags: long for set_bit */
168 } idefloppy_pc_t;
169
170 /*
171 * Packet command flag bits.
172 */
173 #define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */
174 #define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */
175 #define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */
176 #define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */
177 #define PC_WRITING 5 /* Data direction */
178
179 #define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */
180
181 /*
182 * Removable Block Access Capabilities Page
183 */
184 typedef struct {
185 #if defined(__LITTLE_ENDIAN_BITFIELD)
186 unsigned page_code :6; /* Page code - Should be 0x1b */
187 unsigned reserved1_6 :1; /* Reserved */
188 unsigned ps :1; /* Should be 0 */
189 #elif defined(__BIG_ENDIAN_BITFIELD)
190 unsigned ps :1; /* Should be 0 */
191 unsigned reserved1_6 :1; /* Reserved */
192 unsigned page_code :6; /* Page code - Should be 0x1b */
193 #else
194 #error "Bitfield endianness not defined! Check your byteorder.h"
195 #endif
196 u8 page_length; /* Page Length - Should be 0xa */
197 #if defined(__LITTLE_ENDIAN_BITFIELD)
198 unsigned reserved2 :6;
199 unsigned srfp :1; /* Supports reporting progress of format */
200 unsigned sflp :1; /* System floppy type device */
201 unsigned tlun :3; /* Total logical units supported by the device */
202 unsigned reserved3 :3;
203 unsigned sml :1; /* Single / Multiple lun supported */
204 unsigned ncd :1; /* Non cd optical device */
205 #elif defined(__BIG_ENDIAN_BITFIELD)
206 unsigned sflp :1; /* System floppy type device */
207 unsigned srfp :1; /* Supports reporting progress of format */
208 unsigned reserved2 :6;
209 unsigned ncd :1; /* Non cd optical device */
210 unsigned sml :1; /* Single / Multiple lun supported */
211 unsigned reserved3 :3;
212 unsigned tlun :3; /* Total logical units supported by the device */
213 #else
214 #error "Bitfield endianness not defined! Check your byteorder.h"
215 #endif
216 u8 reserved[8];
217 } idefloppy_capabilities_page_t;
218
219 /*
220 * Flexible disk page.
221 */
222 typedef struct {
223 #if defined(__LITTLE_ENDIAN_BITFIELD)
224 unsigned page_code :6; /* Page code - Should be 0x5 */
225 unsigned reserved1_6 :1; /* Reserved */
226 unsigned ps :1; /* The device is capable of saving the page */
227 #elif defined(__BIG_ENDIAN_BITFIELD)
228 unsigned ps :1; /* The device is capable of saving the page */
229 unsigned reserved1_6 :1; /* Reserved */
230 unsigned page_code :6; /* Page code - Should be 0x5 */
231 #else
232 #error "Bitfield endianness not defined! Check your byteorder.h"
233 #endif
234 u8 page_length; /* Page Length - Should be 0x1e */
235 u16 transfer_rate; /* In kilobits per second */
236 u8 heads, sectors; /* Number of heads, Number of sectors per track */
237 u16 sector_size; /* Byes per sector */
238 u16 cyls; /* Number of cylinders */
239 u8 reserved10[10];
240 u8 motor_delay; /* Motor off delay */
241 u8 reserved21[7];
242 u16 rpm; /* Rotations per minute */
243 u8 reserved30[2];
244 } idefloppy_flexible_disk_page_t;
245
246 /*
247 * Format capacity
248 */
249 typedef struct {
250 u8 reserved[3];
251 u8 length; /* Length of the following descriptors in bytes */
252 } idefloppy_capacity_header_t;
253
254 typedef struct {
255 u32 blocks; /* Number of blocks */
256 #if defined(__LITTLE_ENDIAN_BITFIELD)
257 unsigned dc :2; /* Descriptor Code */
258 unsigned reserved :6;
259 #elif defined(__BIG_ENDIAN_BITFIELD)
260 unsigned reserved :6;
261 unsigned dc :2; /* Descriptor Code */
262 #else
263 #error "Bitfield endianness not defined! Check your byteorder.h"
264 #endif
265 u8 length_msb; /* Block Length (MSB)*/
266 u16 length; /* Block Length */
267 } idefloppy_capacity_descriptor_t;
268
269 #define CAPACITY_INVALID 0x00
270 #define CAPACITY_UNFORMATTED 0x01
271 #define CAPACITY_CURRENT 0x02
272 #define CAPACITY_NO_CARTRIDGE 0x03
273
274 /*
275 * Most of our global data which we need to save even as we leave the
276 * driver due to an interrupt or a timer event is stored in a variable
277 * of type idefloppy_floppy_t, defined below.
278 */
279 typedef struct ide_floppy_obj {
280 ide_drive_t *drive;
281 ide_driver_t *driver;
282 struct gendisk *disk;
283 struct kref kref;
284 unsigned int openers; /* protected by BKL for now */
285
286 /* Current packet command */
287 idefloppy_pc_t *pc;
288 /* Last failed packet command */
289 idefloppy_pc_t *failed_pc;
290 /* Packet command stack */
291 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
292 /* Next free packet command storage space */
293 int pc_stack_index;
294 struct request rq_stack[IDEFLOPPY_PC_STACK];
295 /* We implement a circular array */
296 int rq_stack_index;
297
298 /*
299 * Last error information
300 */
301 u8 sense_key, asc, ascq;
302 /* delay this long before sending packet command */
303 u8 ticks;
304 int progress_indication;
305
306 /*
307 * Device information
308 */
309 /* Current format */
310 int blocks, block_size, bs_factor;
311 /* Last format capacity */
312 idefloppy_capacity_descriptor_t capacity;
313 /* Copy of the flexible disk page */
314 idefloppy_flexible_disk_page_t flexible_disk_page;
315 /* Write protect */
316 int wp;
317 /* Supports format progress report */
318 int srfp;
319 /* Status/Action flags */
320 unsigned long flags;
321 } idefloppy_floppy_t;
322
323 #define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
324
325 /*
326 * Floppy flag bits values.
327 */
328 #define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */
329 #define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */
330 #define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */
331 #define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */
332 #define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */
333 #define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */
334
335 /*
336 * ATAPI floppy drive packet commands
337 */
338 #define IDEFLOPPY_FORMAT_UNIT_CMD 0x04
339 #define IDEFLOPPY_INQUIRY_CMD 0x12
340 #define IDEFLOPPY_MODE_SELECT_CMD 0x55
341 #define IDEFLOPPY_MODE_SENSE_CMD 0x5a
342 #define IDEFLOPPY_READ10_CMD 0x28
343 #define IDEFLOPPY_READ12_CMD 0xa8
344 #define IDEFLOPPY_READ_CAPACITY_CMD 0x23
345 #define IDEFLOPPY_REQUEST_SENSE_CMD 0x03
346 #define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e
347 #define IDEFLOPPY_SEEK_CMD 0x2b
348 #define IDEFLOPPY_START_STOP_CMD 0x1b
349 #define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00
350 #define IDEFLOPPY_VERIFY_CMD 0x2f
351 #define IDEFLOPPY_WRITE10_CMD 0x2a
352 #define IDEFLOPPY_WRITE12_CMD 0xaa
353 #define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e
354
355 /*
356 * Defines for the mode sense command
357 */
358 #define MODE_SENSE_CURRENT 0x00
359 #define MODE_SENSE_CHANGEABLE 0x01
360 #define MODE_SENSE_DEFAULT 0x02
361 #define MODE_SENSE_SAVED 0x03
362
363 /*
364 * IOCTLs used in low-level formatting.
365 */
366
367 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600
368 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601
369 #define IDEFLOPPY_IOCTL_FORMAT_START 0x4602
370 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603
371
372 #if 0
373 /*
374 * Special requests for our block device strategy routine.
375 */
376 #define IDEFLOPPY_FIRST_RQ 90
377
378 /*
379 * IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue.
380 */
381 #define IDEFLOPPY_PC_RQ 90
382
383 #define IDEFLOPPY_LAST_RQ 90
384
385 /*
386 * A macro which can be used to check if a given request command
387 * originated in the driver or in the buffer cache layer.
388 */
389 #define IDEFLOPPY_RQ_CMD(cmd) ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ))
390
391 #endif
392
393 /*
394 * Error codes which are returned in rq->errors to the higher part
395 * of the driver.
396 */
397 #define IDEFLOPPY_ERROR_GENERAL 101
398
399 /*
400 * The following is used to format the general configuration word of
401 * the ATAPI IDENTIFY DEVICE command.
402 */
403 struct idefloppy_id_gcw {
404 #if defined(__LITTLE_ENDIAN_BITFIELD)
405 unsigned packet_size :2; /* Packet Size */
406 unsigned reserved234 :3; /* Reserved */
407 unsigned drq_type :2; /* Command packet DRQ type */
408 unsigned removable :1; /* Removable media */
409 unsigned device_type :5; /* Device type */
410 unsigned reserved13 :1; /* Reserved */
411 unsigned protocol :2; /* Protocol type */
412 #elif defined(__BIG_ENDIAN_BITFIELD)
413 unsigned protocol :2; /* Protocol type */
414 unsigned reserved13 :1; /* Reserved */
415 unsigned device_type :5; /* Device type */
416 unsigned removable :1; /* Removable media */
417 unsigned drq_type :2; /* Command packet DRQ type */
418 unsigned reserved234 :3; /* Reserved */
419 unsigned packet_size :2; /* Packet Size */
420 #else
421 #error "Bitfield endianness not defined! Check your byteorder.h"
422 #endif
423 };
424
425 /*
426 * INQUIRY packet command - Data Format
427 */
428 typedef struct {
429 #if defined(__LITTLE_ENDIAN_BITFIELD)
430 unsigned device_type :5; /* Peripheral Device Type */
431 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
432 unsigned reserved1_6t0 :7; /* Reserved */
433 unsigned rmb :1; /* Removable Medium Bit */
434 unsigned ansi_version :3; /* ANSI Version */
435 unsigned ecma_version :3; /* ECMA Version */
436 unsigned iso_version :2; /* ISO Version */
437 unsigned response_format :4; /* Response Data Format */
438 unsigned reserved3_45 :2; /* Reserved */
439 unsigned reserved3_6 :1; /* TrmIOP - Reserved */
440 unsigned reserved3_7 :1; /* AENC - Reserved */
441 #elif defined(__BIG_ENDIAN_BITFIELD)
442 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
443 unsigned device_type :5; /* Peripheral Device Type */
444 unsigned rmb :1; /* Removable Medium Bit */
445 unsigned reserved1_6t0 :7; /* Reserved */
446 unsigned iso_version :2; /* ISO Version */
447 unsigned ecma_version :3; /* ECMA Version */
448 unsigned ansi_version :3; /* ANSI Version */
449 unsigned reserved3_7 :1; /* AENC - Reserved */
450 unsigned reserved3_6 :1; /* TrmIOP - Reserved */
451 unsigned reserved3_45 :2; /* Reserved */
452 unsigned response_format :4; /* Response Data Format */
453 #else
454 #error "Bitfield endianness not defined! Check your byteorder.h"
455 #endif
456 u8 additional_length; /* Additional Length (total_length-4) */
457 u8 rsv5, rsv6, rsv7; /* Reserved */
458 u8 vendor_id[8]; /* Vendor Identification */
459 u8 product_id[16]; /* Product Identification */
460 u8 revision_level[4]; /* Revision Level */
461 u8 vendor_specific[20]; /* Vendor Specific - Optional */
462 u8 reserved56t95[40]; /* Reserved - Optional */
463 /* Additional information may be returned */
464 } idefloppy_inquiry_result_t;
465
466 /*
467 * REQUEST SENSE packet command result - Data Format.
468 */
469 typedef struct {
470 #if defined(__LITTLE_ENDIAN_BITFIELD)
471 unsigned error_code :7; /* Current error (0x70) */
472 unsigned valid :1; /* The information field conforms to SFF-8070i */
473 u8 reserved1 :8; /* Reserved */
474 unsigned sense_key :4; /* Sense Key */
475 unsigned reserved2_4 :1; /* Reserved */
476 unsigned ili :1; /* Incorrect Length Indicator */
477 unsigned reserved2_67 :2;
478 #elif defined(__BIG_ENDIAN_BITFIELD)
479 unsigned valid :1; /* The information field conforms to SFF-8070i */
480 unsigned error_code :7; /* Current error (0x70) */
481 u8 reserved1 :8; /* Reserved */
482 unsigned reserved2_67 :2;
483 unsigned ili :1; /* Incorrect Length Indicator */
484 unsigned reserved2_4 :1; /* Reserved */
485 unsigned sense_key :4; /* Sense Key */
486 #else
487 #error "Bitfield endianness not defined! Check your byteorder.h"
488 #endif
489 u32 information __attribute__ ((packed));
490 u8 asl; /* Additional sense length (n-7) */
491 u32 command_specific; /* Additional command specific information */
492 u8 asc; /* Additional Sense Code */
493 u8 ascq; /* Additional Sense Code Qualifier */
494 u8 replaceable_unit_code; /* Field Replaceable Unit Code */
495 u8 sksv[3];
496 u8 pad[2]; /* Padding to 20 bytes */
497 } idefloppy_request_sense_result_t;
498
499 /*
500 * Pages of the SELECT SENSE / MODE SENSE packet commands.
501 */
502 #define IDEFLOPPY_CAPABILITIES_PAGE 0x1b
503 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05
504
505 /*
506 * Mode Parameter Header for the MODE SENSE packet command
507 */
508 typedef struct {
509 u16 mode_data_length; /* Length of the following data transfer */
510 u8 medium_type; /* Medium Type */
511 #if defined(__LITTLE_ENDIAN_BITFIELD)
512 unsigned reserved3 :7;
513 unsigned wp :1; /* Write protect */
514 #elif defined(__BIG_ENDIAN_BITFIELD)
515 unsigned wp :1; /* Write protect */
516 unsigned reserved3 :7;
517 #else
518 #error "Bitfield endianness not defined! Check your byteorder.h"
519 #endif
520 u8 reserved[4];
521 } idefloppy_mode_parameter_header_t;
522
523 static DEFINE_MUTEX(idefloppy_ref_mutex);
524
525 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
526
527 #define ide_floppy_g(disk) \
528 container_of((disk)->private_data, struct ide_floppy_obj, driver)
529
530 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
531 {
532 struct ide_floppy_obj *floppy = NULL;
533
534 mutex_lock(&idefloppy_ref_mutex);
535 floppy = ide_floppy_g(disk);
536 if (floppy)
537 kref_get(&floppy->kref);
538 mutex_unlock(&idefloppy_ref_mutex);
539 return floppy;
540 }
541
542 static void ide_floppy_release(struct kref *);
543
544 static void ide_floppy_put(struct ide_floppy_obj *floppy)
545 {
546 mutex_lock(&idefloppy_ref_mutex);
547 kref_put(&floppy->kref, ide_floppy_release);
548 mutex_unlock(&idefloppy_ref_mutex);
549 }
550
551 /*
552 * Too bad. The drive wants to send us data which we are not ready to accept.
553 * Just throw it away.
554 */
555 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
556 {
557 while (bcount--)
558 (void) HWIF(drive)->INB(IDE_DATA_REG);
559 }
560
561 #if IDEFLOPPY_DEBUG_BUGS
562 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
563 {
564 while (bcount--)
565 HWIF(drive)->OUTB(0, IDE_DATA_REG);
566 }
567 #endif /* IDEFLOPPY_DEBUG_BUGS */
568
569
570 /*
571 * idefloppy_do_end_request is used to finish servicing a request.
572 *
573 * For read/write requests, we will call ide_end_request to pass to the
574 * next buffer.
575 */
576 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
577 {
578 idefloppy_floppy_t *floppy = drive->driver_data;
579 struct request *rq = HWGROUP(drive)->rq;
580 int error;
581
582 debug_log(KERN_INFO "Reached idefloppy_end_request\n");
583
584 switch (uptodate) {
585 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
586 case 1: error = 0; break;
587 default: error = uptodate;
588 }
589 if (error)
590 floppy->failed_pc = NULL;
591 /* Why does this happen? */
592 if (!rq)
593 return 0;
594 if (!blk_special_request(rq)) {
595 /* our real local end request function */
596 ide_end_request(drive, uptodate, nsecs);
597 return 0;
598 }
599 rq->errors = error;
600 /* fixme: need to move this local also */
601 ide_end_drive_cmd(drive, 0, 0);
602 return 0;
603 }
604
605 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
606 {
607 struct request *rq = pc->rq;
608 struct bio_vec *bvec;
609 struct req_iterator iter;
610 unsigned long flags;
611 char *data;
612 int count, done = 0;
613
614 rq_for_each_segment(bvec, rq, iter) {
615 if (!bcount)
616 break;
617
618 count = min(bvec->bv_len, bcount);
619
620 data = bvec_kmap_irq(bvec, &flags);
621 drive->hwif->atapi_input_bytes(drive, data, count);
622 bvec_kunmap_irq(data, &flags);
623
624 bcount -= count;
625 pc->b_count += count;
626 done += count;
627 }
628
629 idefloppy_do_end_request(drive, 1, done >> 9);
630
631 if (bcount) {
632 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
633 idefloppy_discard_data(drive, bcount);
634 }
635 }
636
637 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
638 {
639 struct request *rq = pc->rq;
640 struct req_iterator iter;
641 struct bio_vec *bvec;
642 unsigned long flags;
643 int count, done = 0;
644 char *data;
645
646 rq_for_each_segment(bvec, rq, iter) {
647 if (!bcount)
648 break;
649
650 count = min(bvec->bv_len, bcount);
651
652 data = bvec_kmap_irq(bvec, &flags);
653 drive->hwif->atapi_output_bytes(drive, data, count);
654 bvec_kunmap_irq(data, &flags);
655
656 bcount -= count;
657 pc->b_count += count;
658 done += count;
659 }
660
661 idefloppy_do_end_request(drive, 1, done >> 9);
662
663 #if IDEFLOPPY_DEBUG_BUGS
664 if (bcount) {
665 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
666 idefloppy_write_zeros(drive, bcount);
667 }
668 #endif
669 }
670
671 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
672 {
673 struct request *rq = pc->rq;
674 struct bio *bio = rq->bio;
675
676 while ((bio = rq->bio) != NULL)
677 idefloppy_do_end_request(drive, 1, 0);
678 }
679
680 /*
681 * idefloppy_queue_pc_head generates a new packet command request in front
682 * of the request queue, before the current request, so that it will be
683 * processed immediately, on the next pass through the driver.
684 */
685 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
686 {
687 struct ide_floppy_obj *floppy = drive->driver_data;
688
689 ide_init_drive_cmd(rq);
690 rq->buffer = (char *) pc;
691 rq->cmd_type = REQ_TYPE_SPECIAL;
692 rq->rq_disk = floppy->disk;
693 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
694 }
695
696 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
697 {
698 idefloppy_floppy_t *floppy = drive->driver_data;
699
700 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
701 floppy->pc_stack_index=0;
702 return (&floppy->pc_stack[floppy->pc_stack_index++]);
703 }
704
705 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
706 {
707 idefloppy_floppy_t *floppy = drive->driver_data;
708
709 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
710 floppy->rq_stack_index = 0;
711 return (&floppy->rq_stack[floppy->rq_stack_index++]);
712 }
713
714 /*
715 * idefloppy_analyze_error is called on each failed packet command retry
716 * to analyze the request sense.
717 */
718 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
719 {
720 idefloppy_floppy_t *floppy = drive->driver_data;
721
722 floppy->sense_key = result->sense_key;
723 floppy->asc = result->asc;
724 floppy->ascq = result->ascq;
725 floppy->progress_indication = result->sksv[0] & 0x80 ?
726 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
727 if (floppy->failed_pc)
728 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
729 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
730 result->sense_key, result->asc, result->ascq);
731 else
732 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
733 "ascq = %x\n", result->sense_key,
734 result->asc, result->ascq);
735 }
736
737 static void idefloppy_request_sense_callback (ide_drive_t *drive)
738 {
739 idefloppy_floppy_t *floppy = drive->driver_data;
740
741 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
742
743 if (!floppy->pc->error) {
744 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
745 idefloppy_do_end_request(drive, 1, 0);
746 } else {
747 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
748 idefloppy_do_end_request(drive, 0, 0);
749 }
750 }
751
752 /*
753 * General packet command callback function.
754 */
755 static void idefloppy_pc_callback (ide_drive_t *drive)
756 {
757 idefloppy_floppy_t *floppy = drive->driver_data;
758
759 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
760
761 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
762 }
763
764 /*
765 * idefloppy_init_pc initializes a packet command.
766 */
767 static void idefloppy_init_pc (idefloppy_pc_t *pc)
768 {
769 memset(pc->c, 0, 12);
770 pc->retries = 0;
771 pc->flags = 0;
772 pc->request_transfer = 0;
773 pc->buffer = pc->pc_buffer;
774 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
775 pc->callback = &idefloppy_pc_callback;
776 }
777
778 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
779 {
780 idefloppy_init_pc(pc);
781 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
782 pc->c[4] = 255;
783 pc->request_transfer = 18;
784 pc->callback = &idefloppy_request_sense_callback;
785 }
786
787 /*
788 * idefloppy_retry_pc is called when an error was detected during the
789 * last packet command. We queue a request sense packet command in
790 * the head of the request list.
791 */
792 static void idefloppy_retry_pc (ide_drive_t *drive)
793 {
794 idefloppy_pc_t *pc;
795 struct request *rq;
796 atapi_error_t error;
797
798 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
799 pc = idefloppy_next_pc_storage(drive);
800 rq = idefloppy_next_rq_storage(drive);
801 idefloppy_create_request_sense_cmd(pc);
802 idefloppy_queue_pc_head(drive, pc, rq);
803 }
804
805 /*
806 * idefloppy_pc_intr is the usual interrupt handler which will be called
807 * during a packet command.
808 */
809 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
810 {
811 idefloppy_floppy_t *floppy = drive->driver_data;
812 atapi_status_t status;
813 atapi_bcount_t bcount;
814 atapi_ireason_t ireason;
815 idefloppy_pc_t *pc = floppy->pc;
816 struct request *rq = pc->rq;
817 unsigned int temp;
818
819 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
820 __FUNCTION__);
821
822 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
823 if (HWIF(drive)->ide_dma_end(drive)) {
824 set_bit(PC_DMA_ERROR, &pc->flags);
825 } else {
826 pc->actually_transferred = pc->request_transfer;
827 idefloppy_update_buffers(drive, pc);
828 }
829 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
830 }
831
832 /* Clear the interrupt */
833 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
834
835 if (!status.b.drq) { /* No more interrupts */
836 debug_log(KERN_INFO "Packet command completed, %d bytes "
837 "transferred\n", pc->actually_transferred);
838 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
839
840 local_irq_enable_in_hardirq();
841
842 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
843 /* Error detected */
844 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
845 drive->name);
846 rq->errors++;
847 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
848 printk(KERN_ERR "ide-floppy: I/O error in "
849 "request sense command\n");
850 return ide_do_reset(drive);
851 }
852 /* Retry operation */
853 idefloppy_retry_pc(drive);
854 /* queued, but not started */
855 return ide_stopped;
856 }
857 pc->error = 0;
858 if (floppy->failed_pc == pc)
859 floppy->failed_pc = NULL;
860 /* Command finished - Call the callback function */
861 pc->callback(drive);
862 return ide_stopped;
863 }
864
865 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
866 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
867 "more interrupts in DMA mode\n");
868 ide_dma_off(drive);
869 return ide_do_reset(drive);
870 }
871
872 /* Get the number of bytes to transfer */
873 bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
874 bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
875 /* on this interrupt */
876 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
877
878 if (ireason.b.cod) {
879 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
880 return ide_do_reset(drive);
881 }
882 if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
883 /* Hopefully, we will never get here */
884 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
885 ireason.b.io ? "Write":"Read");
886 printk(KERN_ERR "but the floppy wants us to %s !\n",
887 ireason.b.io ? "Read":"Write");
888 return ide_do_reset(drive);
889 }
890 if (!test_bit(PC_WRITING, &pc->flags)) {
891 /* Reading - Check that we have enough space */
892 temp = pc->actually_transferred + bcount.all;
893 if (temp > pc->request_transfer) {
894 if (temp > pc->buffer_size) {
895 printk(KERN_ERR "ide-floppy: The floppy wants "
896 "to send us more data than expected "
897 "- discarding data\n");
898 idefloppy_discard_data(drive,bcount.all);
899 BUG_ON(HWGROUP(drive)->handler != NULL);
900 ide_set_handler(drive,
901 &idefloppy_pc_intr,
902 IDEFLOPPY_WAIT_CMD,
903 NULL);
904 return ide_started;
905 }
906 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
907 "send us more data than expected - "
908 "allowing transfer\n");
909 }
910 }
911 if (test_bit(PC_WRITING, &pc->flags)) {
912 if (pc->buffer != NULL)
913 /* Write the current buffer */
914 HWIF(drive)->atapi_output_bytes(drive,
915 pc->current_position,
916 bcount.all);
917 else
918 idefloppy_output_buffers(drive, pc, bcount.all);
919 } else {
920 if (pc->buffer != NULL)
921 /* Read the current buffer */
922 HWIF(drive)->atapi_input_bytes(drive,
923 pc->current_position,
924 bcount.all);
925 else
926 idefloppy_input_buffers(drive, pc, bcount.all);
927 }
928 /* Update the current position */
929 pc->actually_transferred += bcount.all;
930 pc->current_position += bcount.all;
931
932 BUG_ON(HWGROUP(drive)->handler != NULL);
933 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */
934 return ide_started;
935 }
936
937 /*
938 * This is the original routine that did the packet transfer.
939 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
940 * for that drive below. The algorithm is chosen based on drive type
941 */
942 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
943 {
944 ide_startstop_t startstop;
945 idefloppy_floppy_t *floppy = drive->driver_data;
946 atapi_ireason_t ireason;
947
948 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
949 printk(KERN_ERR "ide-floppy: Strange, packet command "
950 "initiated yet DRQ isn't asserted\n");
951 return startstop;
952 }
953 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
954 if (!ireason.b.cod || ireason.b.io) {
955 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
956 "issuing a packet command\n");
957 return ide_do_reset(drive);
958 }
959 BUG_ON(HWGROUP(drive)->handler != NULL);
960 /* Set the interrupt routine */
961 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
962 /* Send the actual packet */
963 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
964 return ide_started;
965 }
966
967
968 /*
969 * What we have here is a classic case of a top half / bottom half
970 * interrupt service routine. In interrupt mode, the device sends
971 * an interrupt to signal it's ready to receive a packet. However,
972 * we need to delay about 2-3 ticks before issuing the packet or we
973 * gets in trouble.
974 *
975 * So, follow carefully. transfer_pc1 is called as an interrupt (or
976 * directly). In either case, when the device says it's ready for a
977 * packet, we schedule the packet transfer to occur about 2-3 ticks
978 * later in transfer_pc2.
979 */
980 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
981 {
982 idefloppy_floppy_t *floppy = drive->driver_data;
983
984 /* Send the actual packet */
985 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
986 /* Timeout for the packet command */
987 return IDEFLOPPY_WAIT_CMD;
988 }
989
990 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
991 {
992 idefloppy_floppy_t *floppy = drive->driver_data;
993 ide_startstop_t startstop;
994 atapi_ireason_t ireason;
995
996 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
997 printk(KERN_ERR "ide-floppy: Strange, packet command "
998 "initiated yet DRQ isn't asserted\n");
999 return startstop;
1000 }
1001 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
1002 if (!ireason.b.cod || ireason.b.io) {
1003 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
1004 "while issuing a packet command\n");
1005 return ide_do_reset(drive);
1006 }
1007 /*
1008 * The following delay solves a problem with ATAPI Zip 100 drives
1009 * where the Busy flag was apparently being deasserted before the
1010 * unit was ready to receive data. This was happening on a
1011 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
1012 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
1013 * used until after the packet is moved in about 50 msec.
1014 */
1015 BUG_ON(HWGROUP(drive)->handler != NULL);
1016 ide_set_handler(drive,
1017 &idefloppy_pc_intr, /* service routine for packet command */
1018 floppy->ticks, /* wait this long before "failing" */
1019 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */
1020 return ide_started;
1021 }
1022
1023 /**
1024 * idefloppy_should_report_error()
1025 *
1026 * Supresses error messages resulting from Medium not present
1027 */
1028 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1029 {
1030 if (floppy->sense_key == 0x02 &&
1031 floppy->asc == 0x3a &&
1032 floppy->ascq == 0x00)
1033 return 0;
1034 return 1;
1035 }
1036
1037 /*
1038 * Issue a packet command
1039 */
1040 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1041 {
1042 idefloppy_floppy_t *floppy = drive->driver_data;
1043 ide_hwif_t *hwif = drive->hwif;
1044 atapi_feature_t feature;
1045 atapi_bcount_t bcount;
1046 ide_handler_t *pkt_xfer_routine;
1047
1048 #if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone
1049 and have lived on another thread's stack; that stack may have become
1050 unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */
1051 #if IDEFLOPPY_DEBUG_BUGS
1052 if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD &&
1053 pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
1054 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - "
1055 "Two request sense in serial were issued\n");
1056 }
1057 #endif /* IDEFLOPPY_DEBUG_BUGS */
1058 #endif
1059
1060 if (floppy->failed_pc == NULL &&
1061 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1062 floppy->failed_pc = pc;
1063 /* Set the current packet command */
1064 floppy->pc = pc;
1065
1066 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1067 test_bit(PC_ABORT, &pc->flags)) {
1068 /*
1069 * We will "abort" retrying a packet command in case
1070 * a legitimate error code was received.
1071 */
1072 if (!test_bit(PC_ABORT, &pc->flags)) {
1073 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1074 if (idefloppy_should_report_error(floppy))
1075 printk(KERN_ERR "ide-floppy: %s: I/O error, "
1076 "pc = %2x, key = %2x, "
1077 "asc = %2x, ascq = %2x\n",
1078 drive->name, pc->c[0],
1079 floppy->sense_key,
1080 floppy->asc, floppy->ascq);
1081 }
1082 /* Giving up */
1083 pc->error = IDEFLOPPY_ERROR_GENERAL;
1084 }
1085 floppy->failed_pc = NULL;
1086 pc->callback(drive);
1087 return ide_stopped;
1088 }
1089
1090 debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1091
1092 pc->retries++;
1093 /* We haven't transferred any data yet */
1094 pc->actually_transferred = 0;
1095 pc->current_position = pc->buffer;
1096 bcount.all = min(pc->request_transfer, 63 * 1024);
1097
1098 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
1099 ide_dma_off(drive);
1100
1101 feature.all = 0;
1102
1103 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1104 feature.b.dma = !hwif->dma_setup(drive);
1105
1106 if (IDE_CONTROL_REG)
1107 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1108 /* Use PIO/DMA */
1109 HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
1110 HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
1111 HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
1112 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1113
1114 if (feature.b.dma) { /* Begin DMA, if necessary */
1115 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1116 hwif->dma_start(drive);
1117 }
1118
1119 /* Can we transfer the packet when we get the interrupt or wait? */
1120 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1121 /* wait */
1122 pkt_xfer_routine = &idefloppy_transfer_pc1;
1123 } else {
1124 /* immediate */
1125 pkt_xfer_routine = &idefloppy_transfer_pc;
1126 }
1127
1128 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1129 /* Issue the packet command */
1130 ide_execute_command(drive, WIN_PACKETCMD,
1131 pkt_xfer_routine,
1132 IDEFLOPPY_WAIT_CMD,
1133 NULL);
1134 return ide_started;
1135 } else {
1136 /* Issue the packet command */
1137 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1138 return (*pkt_xfer_routine) (drive);
1139 }
1140 }
1141
1142 static void idefloppy_rw_callback (ide_drive_t *drive)
1143 {
1144 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1145
1146 idefloppy_do_end_request(drive, 1, 0);
1147 return;
1148 }
1149
1150 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1151 {
1152 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1153 "prevent = %d\n", prevent);
1154
1155 idefloppy_init_pc(pc);
1156 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1157 pc->c[4] = prevent;
1158 }
1159
1160 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1161 {
1162 idefloppy_init_pc(pc);
1163 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1164 pc->c[7] = 255;
1165 pc->c[8] = 255;
1166 pc->request_transfer = 255;
1167 }
1168
1169 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1170 int flags)
1171 {
1172 idefloppy_init_pc(pc);
1173 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1174 pc->c[1] = 0x17;
1175
1176 memset(pc->buffer, 0, 12);
1177 pc->buffer[1] = 0xA2;
1178 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1179
1180 if (flags & 1) /* Verify bit on... */
1181 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */
1182 pc->buffer[3] = 8;
1183
1184 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1185 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1186 pc->buffer_size=12;
1187 set_bit(PC_WRITING, &pc->flags);
1188 }
1189
1190 /*
1191 * A mode sense command is used to "sense" floppy parameters.
1192 */
1193 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1194 {
1195 u16 length = sizeof(idefloppy_mode_parameter_header_t);
1196
1197 idefloppy_init_pc(pc);
1198 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1199 pc->c[1] = 0;
1200 pc->c[2] = page_code + (type << 6);
1201
1202 switch (page_code) {
1203 case IDEFLOPPY_CAPABILITIES_PAGE:
1204 length += 12;
1205 break;
1206 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1207 length += 32;
1208 break;
1209 default:
1210 printk(KERN_ERR "ide-floppy: unsupported page code "
1211 "in create_mode_sense_cmd\n");
1212 }
1213 put_unaligned(htons(length), (u16 *) &pc->c[7]);
1214 pc->request_transfer = length;
1215 }
1216
1217 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1218 {
1219 idefloppy_init_pc(pc);
1220 pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1221 pc->c[4] = start;
1222 }
1223
1224 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1225 {
1226 idefloppy_init_pc(pc);
1227 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1228 }
1229
1230 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1231 {
1232 int block = sector / floppy->bs_factor;
1233 int blocks = rq->nr_sectors / floppy->bs_factor;
1234 int cmd = rq_data_dir(rq);
1235
1236 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1237 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1238 block, blocks);
1239
1240 idefloppy_init_pc(pc);
1241 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1242 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1243 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1244 } else {
1245 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1246 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1247 }
1248 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1249 pc->callback = &idefloppy_rw_callback;
1250 pc->rq = rq;
1251 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1252 if (rq->cmd_flags & REQ_RW)
1253 set_bit(PC_WRITING, &pc->flags);
1254 pc->buffer = NULL;
1255 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1256 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1257 }
1258
1259 static void
1260 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1261 {
1262 idefloppy_init_pc(pc);
1263 pc->callback = &idefloppy_rw_callback;
1264 memcpy(pc->c, rq->cmd, sizeof(pc->c));
1265 pc->rq = rq;
1266 pc->b_count = rq->data_len;
1267 if (rq->data_len && rq_data_dir(rq) == WRITE)
1268 set_bit(PC_WRITING, &pc->flags);
1269 pc->buffer = rq->data;
1270 if (rq->bio)
1271 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1272
1273 /*
1274 * possibly problematic, doesn't look like ide-floppy correctly
1275 * handled scattered requests if dma fails...
1276 */
1277 pc->request_transfer = pc->buffer_size = rq->data_len;
1278 }
1279
1280 /*
1281 * idefloppy_do_request is our request handling function.
1282 */
1283 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1284 {
1285 idefloppy_floppy_t *floppy = drive->driver_data;
1286 idefloppy_pc_t *pc;
1287 unsigned long block = (unsigned long)block_s;
1288
1289 debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
1290 rq->rq_disk ? rq->rq_disk->disk_name : "?",
1291 rq->flags, rq->errors);
1292 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1293 "current_nr_sectors: %d\n", (long)rq->sector,
1294 rq->nr_sectors, rq->current_nr_sectors);
1295
1296 if (rq->errors >= ERROR_MAX) {
1297 if (floppy->failed_pc != NULL) {
1298 if (idefloppy_should_report_error(floppy))
1299 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1300 " key = %2x, asc = %2x, ascq = %2x\n",
1301 drive->name, floppy->failed_pc->c[0],
1302 floppy->sense_key, floppy->asc, floppy->ascq);
1303 }
1304 else
1305 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1306 drive->name);
1307 idefloppy_do_end_request(drive, 0, 0);
1308 return ide_stopped;
1309 }
1310 if (blk_fs_request(rq)) {
1311 if (((long)rq->sector % floppy->bs_factor) ||
1312 (rq->nr_sectors % floppy->bs_factor)) {
1313 printk("%s: unsupported r/w request size\n",
1314 drive->name);
1315 idefloppy_do_end_request(drive, 0, 0);
1316 return ide_stopped;
1317 }
1318 pc = idefloppy_next_pc_storage(drive);
1319 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1320 } else if (blk_special_request(rq)) {
1321 pc = (idefloppy_pc_t *) rq->buffer;
1322 } else if (blk_pc_request(rq)) {
1323 pc = idefloppy_next_pc_storage(drive);
1324 idefloppy_blockpc_cmd(floppy, pc, rq);
1325 } else {
1326 blk_dump_rq_flags(rq,
1327 "ide-floppy: unsupported command in queue");
1328 idefloppy_do_end_request(drive, 0, 0);
1329 return ide_stopped;
1330 }
1331
1332 pc->rq = rq;
1333 return idefloppy_issue_pc(drive, pc);
1334 }
1335
1336 /*
1337 * idefloppy_queue_pc_tail adds a special packet command request to the
1338 * tail of the request queue, and waits for it to be serviced.
1339 */
1340 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1341 {
1342 struct ide_floppy_obj *floppy = drive->driver_data;
1343 struct request rq;
1344
1345 ide_init_drive_cmd (&rq);
1346 rq.buffer = (char *) pc;
1347 rq.cmd_type = REQ_TYPE_SPECIAL;
1348 rq.rq_disk = floppy->disk;
1349
1350 return ide_do_drive_cmd(drive, &rq, ide_wait);
1351 }
1352
1353 /*
1354 * Look at the flexible disk page parameters. We will ignore the CHS
1355 * capacity parameters and use the LBA parameters instead.
1356 */
1357 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1358 {
1359 idefloppy_floppy_t *floppy = drive->driver_data;
1360 idefloppy_pc_t pc;
1361 idefloppy_mode_parameter_header_t *header;
1362 idefloppy_flexible_disk_page_t *page;
1363 int capacity, lba_capacity;
1364
1365 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1366 if (idefloppy_queue_pc_tail(drive,&pc)) {
1367 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1368 "page parameters\n");
1369 return 1;
1370 }
1371 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1372 floppy->wp = header->wp;
1373 set_disk_ro(floppy->disk, floppy->wp);
1374 page = (idefloppy_flexible_disk_page_t *) (header + 1);
1375
1376 page->transfer_rate = ntohs(page->transfer_rate);
1377 page->sector_size = ntohs(page->sector_size);
1378 page->cyls = ntohs(page->cyls);
1379 page->rpm = ntohs(page->rpm);
1380 capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1381 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1382 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1383 "%d sector size, %d rpm\n",
1384 drive->name, capacity / 1024, page->cyls,
1385 page->heads, page->sectors,
1386 page->transfer_rate / 8, page->sector_size, page->rpm);
1387
1388 floppy->flexible_disk_page = *page;
1389 drive->bios_cyl = page->cyls;
1390 drive->bios_head = page->heads;
1391 drive->bios_sect = page->sectors;
1392 lba_capacity = floppy->blocks * floppy->block_size;
1393 if (capacity < lba_capacity) {
1394 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1395 "bytes, but the drive only handles %d\n",
1396 drive->name, lba_capacity, capacity);
1397 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1398 }
1399 return 0;
1400 }
1401
1402 static int idefloppy_get_capability_page(ide_drive_t *drive)
1403 {
1404 idefloppy_floppy_t *floppy = drive->driver_data;
1405 idefloppy_pc_t pc;
1406 idefloppy_mode_parameter_header_t *header;
1407 idefloppy_capabilities_page_t *page;
1408
1409 floppy->srfp = 0;
1410 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1411 MODE_SENSE_CURRENT);
1412
1413 set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1414 if (idefloppy_queue_pc_tail(drive,&pc)) {
1415 return 1;
1416 }
1417
1418 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1419 page= (idefloppy_capabilities_page_t *)(header+1);
1420 floppy->srfp = page->srfp;
1421 return (0);
1422 }
1423
1424 /*
1425 * Determine if a media is present in the floppy drive, and if so,
1426 * its LBA capacity.
1427 */
1428 static int idefloppy_get_capacity (ide_drive_t *drive)
1429 {
1430 idefloppy_floppy_t *floppy = drive->driver_data;
1431 idefloppy_pc_t pc;
1432 idefloppy_capacity_header_t *header;
1433 idefloppy_capacity_descriptor_t *descriptor;
1434 int i, descriptors, rc = 1, blocks, length;
1435
1436 drive->bios_cyl = 0;
1437 drive->bios_head = drive->bios_sect = 0;
1438 floppy->blocks = 0;
1439 floppy->bs_factor = 1;
1440 set_capacity(floppy->disk, 0);
1441
1442 idefloppy_create_read_capacity_cmd(&pc);
1443 if (idefloppy_queue_pc_tail(drive, &pc)) {
1444 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1445 return 1;
1446 }
1447 header = (idefloppy_capacity_header_t *) pc.buffer;
1448 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1449 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1450
1451 for (i = 0; i < descriptors; i++, descriptor++) {
1452 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1453 length = descriptor->length = ntohs(descriptor->length);
1454
1455 if (!i)
1456 {
1457 switch (descriptor->dc) {
1458 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1459 case CAPACITY_UNFORMATTED:
1460 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1461 /*
1462 * If it is not a clik drive, break out
1463 * (maintains previous driver behaviour)
1464 */
1465 break;
1466 case CAPACITY_CURRENT:
1467 /* Normal Zip/LS-120 disks */
1468 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1469 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1470 "sector size\n", drive->name,
1471 blocks * length / 1024, blocks, length);
1472 floppy->capacity = *descriptor;
1473 if (!length || length % 512) {
1474 printk(KERN_NOTICE "%s: %d bytes block size "
1475 "not supported\n", drive->name, length);
1476 } else {
1477 floppy->blocks = blocks;
1478 floppy->block_size = length;
1479 if ((floppy->bs_factor = length / 512) != 1)
1480 printk(KERN_NOTICE "%s: warning: non "
1481 "512 bytes block size not "
1482 "fully supported\n",
1483 drive->name);
1484 rc = 0;
1485 }
1486 break;
1487 case CAPACITY_NO_CARTRIDGE:
1488 /*
1489 * This is a KERN_ERR so it appears on screen
1490 * for the user to see
1491 */
1492 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1493 break;
1494 case CAPACITY_INVALID:
1495 printk(KERN_ERR "%s: Invalid capacity for disk "
1496 "in drive\n", drive->name);
1497 break;
1498 }
1499 }
1500 if (!i) {
1501 debug_log( "Descriptor 0 Code: %d\n",
1502 descriptor->dc);
1503 }
1504 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1505 "sector size\n", i, blocks * length / 1024, blocks,
1506 length);
1507 }
1508
1509 /* Clik! disk does not support get_flexible_disk_page */
1510 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1511 (void) idefloppy_get_flexible_disk_page(drive);
1512 }
1513
1514 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1515 return rc;
1516 }
1517
1518 /*
1519 ** Obtain the list of formattable capacities.
1520 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1521 ** descriptors to userland, instead of our own structures.
1522 **
1523 ** Userland gives us the following structure:
1524 **
1525 ** struct idefloppy_format_capacities {
1526 ** int nformats;
1527 ** struct {
1528 ** int nblocks;
1529 ** int blocksize;
1530 ** } formats[];
1531 ** } ;
1532 **
1533 ** userland initializes nformats to the number of allocated formats[]
1534 ** records. On exit we set nformats to the number of records we've
1535 ** actually initialized.
1536 **
1537 */
1538
1539 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1540 {
1541 idefloppy_pc_t pc;
1542 idefloppy_capacity_header_t *header;
1543 idefloppy_capacity_descriptor_t *descriptor;
1544 int i, descriptors, blocks, length;
1545 int u_array_size;
1546 int u_index;
1547 int __user *argp;
1548
1549 if (get_user(u_array_size, arg))
1550 return (-EFAULT);
1551
1552 if (u_array_size <= 0)
1553 return (-EINVAL);
1554
1555 idefloppy_create_read_capacity_cmd(&pc);
1556 if (idefloppy_queue_pc_tail(drive, &pc)) {
1557 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1558 return (-EIO);
1559 }
1560 header = (idefloppy_capacity_header_t *) pc.buffer;
1561 descriptors = header->length /
1562 sizeof(idefloppy_capacity_descriptor_t);
1563 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1564
1565 u_index = 0;
1566 argp = arg + 1;
1567
1568 /*
1569 ** We always skip the first capacity descriptor. That's the
1570 ** current capacity. We are interested in the remaining descriptors,
1571 ** the formattable capacities.
1572 */
1573
1574 for (i=0; i<descriptors; i++, descriptor++) {
1575 if (u_index >= u_array_size)
1576 break; /* User-supplied buffer too small */
1577 if (i == 0)
1578 continue; /* Skip the first descriptor */
1579
1580 blocks = ntohl(descriptor->blocks);
1581 length = ntohs(descriptor->length);
1582
1583 if (put_user(blocks, argp))
1584 return(-EFAULT);
1585 ++argp;
1586
1587 if (put_user(length, argp))
1588 return (-EFAULT);
1589 ++argp;
1590
1591 ++u_index;
1592 }
1593
1594 if (put_user(u_index, arg))
1595 return (-EFAULT);
1596 return (0);
1597 }
1598
1599 /*
1600 ** Send ATAPI_FORMAT_UNIT to the drive.
1601 **
1602 ** Userland gives us the following structure:
1603 **
1604 ** struct idefloppy_format_command {
1605 ** int nblocks;
1606 ** int blocksize;
1607 ** int flags;
1608 ** } ;
1609 **
1610 ** flags is a bitmask, currently, the only defined flag is:
1611 **
1612 ** 0x01 - verify media after format.
1613 */
1614
1615 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1616 {
1617 int blocks;
1618 int length;
1619 int flags;
1620 idefloppy_pc_t pc;
1621
1622 if (get_user(blocks, arg) ||
1623 get_user(length, arg+1) ||
1624 get_user(flags, arg+2)) {
1625 return (-EFAULT);
1626 }
1627
1628 /* Get the SFRP bit */
1629 (void) idefloppy_get_capability_page(drive);
1630 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1631 if (idefloppy_queue_pc_tail(drive, &pc)) {
1632 return (-EIO);
1633 }
1634
1635 return (0);
1636 }
1637
1638 /*
1639 ** Get ATAPI_FORMAT_UNIT progress indication.
1640 **
1641 ** Userland gives a pointer to an int. The int is set to a progress
1642 ** indicator 0-65536, with 65536=100%.
1643 **
1644 ** If the drive does not support format progress indication, we just check
1645 ** the dsc bit, and return either 0 or 65536.
1646 */
1647
1648 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1649 {
1650 idefloppy_floppy_t *floppy = drive->driver_data;
1651 idefloppy_pc_t pc;
1652 int progress_indication = 0x10000;
1653
1654 if (floppy->srfp) {
1655 idefloppy_create_request_sense_cmd(&pc);
1656 if (idefloppy_queue_pc_tail(drive, &pc)) {
1657 return (-EIO);
1658 }
1659
1660 if (floppy->sense_key == 2 &&
1661 floppy->asc == 4 &&
1662 floppy->ascq == 4) {
1663 progress_indication = floppy->progress_indication;
1664 }
1665 /* Else assume format_unit has finished, and we're
1666 ** at 0x10000 */
1667 } else {
1668 atapi_status_t status;
1669 unsigned long flags;
1670
1671 local_irq_save(flags);
1672 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
1673 local_irq_restore(flags);
1674
1675 progress_indication = !status.b.dsc ? 0 : 0x10000;
1676 }
1677 if (put_user(progress_indication, arg))
1678 return (-EFAULT);
1679
1680 return (0);
1681 }
1682
1683 /*
1684 * Return the current floppy capacity.
1685 */
1686 static sector_t idefloppy_capacity (ide_drive_t *drive)
1687 {
1688 idefloppy_floppy_t *floppy = drive->driver_data;
1689 unsigned long capacity = floppy->blocks * floppy->bs_factor;
1690
1691 return capacity;
1692 }
1693
1694 /*
1695 * idefloppy_identify_device checks if we can support a drive,
1696 * based on the ATAPI IDENTIFY command results.
1697 */
1698 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1699 {
1700 struct idefloppy_id_gcw gcw;
1701 #if IDEFLOPPY_DEBUG_INFO
1702 u16 mask,i;
1703 char buffer[80];
1704 #endif /* IDEFLOPPY_DEBUG_INFO */
1705
1706 *((u16 *) &gcw) = id->config;
1707
1708 #ifdef CONFIG_PPC
1709 /* kludge for Apple PowerBook internal zip */
1710 if ((gcw.device_type == 5) &&
1711 !strstr(id->model, "CD-ROM") &&
1712 strstr(id->model, "ZIP"))
1713 gcw.device_type = 0;
1714 #endif
1715
1716 #if IDEFLOPPY_DEBUG_INFO
1717 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1718 switch (gcw.protocol) {
1719 case 0: case 1: sprintf(buffer, "ATA");break;
1720 case 2: sprintf(buffer, "ATAPI");break;
1721 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1722 }
1723 printk(KERN_INFO "Protocol Type: %s\n", buffer);
1724 switch (gcw.device_type) {
1725 case 0: sprintf(buffer, "Direct-access Device");break;
1726 case 1: sprintf(buffer, "Streaming Tape Device");break;
1727 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1728 case 5: sprintf(buffer, "CD-ROM Device");break;
1729 case 6: sprintf(buffer, "Reserved");
1730 case 7: sprintf(buffer, "Optical memory Device");break;
1731 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1732 default: sprintf(buffer, "Reserved");
1733 }
1734 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1735 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1736 switch (gcw.drq_type) {
1737 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1738 case 1: sprintf(buffer, "Interrupt DRQ");break;
1739 case 2: sprintf(buffer, "Accelerated DRQ");break;
1740 case 3: sprintf(buffer, "Reserved");break;
1741 }
1742 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1743 switch (gcw.packet_size) {
1744 case 0: sprintf(buffer, "12 bytes");break;
1745 case 1: sprintf(buffer, "16 bytes");break;
1746 default: sprintf(buffer, "Reserved");break;
1747 }
1748 printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1749 printk(KERN_INFO "Model: %.40s\n",id->model);
1750 printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1751 printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1752 printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1753 printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1754 printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1755 printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1756 printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1757 printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1758 printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1759 printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1760 printk(KERN_INFO "Single Word DMA supported modes:\n");
1761 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1762 if (id->dma_1word & mask)
1763 printk(KERN_INFO " Mode %d%s\n", i,
1764 (id->dma_1word & (mask << 8)) ? " (active)" : "");
1765 }
1766 printk(KERN_INFO "Multi Word DMA supported modes:\n");
1767 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1768 if (id->dma_mword & mask)
1769 printk(KERN_INFO " Mode %d%s\n", i,
1770 (id->dma_mword & (mask << 8)) ? " (active)" : "");
1771 }
1772 if (id->field_valid & 0x0002) {
1773 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1774 id->eide_pio_modes & 1 ? "Mode 3":"None");
1775 if (id->eide_dma_min == 0)
1776 sprintf(buffer, "Not supported");
1777 else
1778 sprintf(buffer, "%d ns",id->eide_dma_min);
1779 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1780 if (id->eide_dma_time == 0)
1781 sprintf(buffer, "Not supported");
1782 else
1783 sprintf(buffer, "%d ns",id->eide_dma_time);
1784 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1785 if (id->eide_pio == 0)
1786 sprintf(buffer, "Not supported");
1787 else
1788 sprintf(buffer, "%d ns",id->eide_pio);
1789 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1790 buffer);
1791 if (id->eide_pio_iordy == 0)
1792 sprintf(buffer, "Not supported");
1793 else
1794 sprintf(buffer, "%d ns",id->eide_pio_iordy);
1795 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1796 } else
1797 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1798 #endif /* IDEFLOPPY_DEBUG_INFO */
1799
1800 if (gcw.protocol != 2)
1801 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1802 else if (gcw.device_type != 0)
1803 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1804 else if (!gcw.removable)
1805 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1806 else if (gcw.drq_type == 3) {
1807 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1808 } else if (gcw.packet_size != 0) {
1809 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1810 } else
1811 return 1;
1812 return 0;
1813 }
1814
1815 #ifdef CONFIG_IDE_PROC_FS
1816 static void idefloppy_add_settings(ide_drive_t *drive)
1817 {
1818 idefloppy_floppy_t *floppy = drive->driver_data;
1819
1820 /*
1821 * drive setting name read/write data type min max mul_factor div_factor data pointer set function
1822 */
1823 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
1824 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
1825 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
1826 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL);
1827 }
1828 #else
1829 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1830 #endif
1831
1832 /*
1833 * Driver initialization.
1834 */
1835 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1836 {
1837 struct idefloppy_id_gcw gcw;
1838
1839 *((u16 *) &gcw) = drive->id->config;
1840 floppy->pc = floppy->pc_stack;
1841 if (gcw.drq_type == 1)
1842 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1843 /*
1844 * We used to check revisions here. At this point however
1845 * I'm giving up. Just assume they are all broken, its easier.
1846 *
1847 * The actual reason for the workarounds was likely
1848 * a driver bug after all rather than a firmware bug,
1849 * and the workaround below used to hide it. It should
1850 * be fixed as of version 1.9, but to be on the safe side
1851 * we'll leave the limitation below for the 2.2.x tree.
1852 */
1853
1854 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1855 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1856 /* This value will be visible in the /proc/ide/hdx/settings */
1857 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1858 blk_queue_max_sectors(drive->queue, 64);
1859 }
1860
1861 /*
1862 * Guess what? The IOMEGA Clik! drive also needs the
1863 * above fix. It makes nasty clicking noises without
1864 * it, so please don't remove this.
1865 */
1866 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1867 blk_queue_max_sectors(drive->queue, 64);
1868 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1869 }
1870
1871
1872 (void) idefloppy_get_capacity(drive);
1873 idefloppy_add_settings(drive);
1874 }
1875
1876 static void ide_floppy_remove(ide_drive_t *drive)
1877 {
1878 idefloppy_floppy_t *floppy = drive->driver_data;
1879 struct gendisk *g = floppy->disk;
1880
1881 ide_proc_unregister_driver(drive, floppy->driver);
1882
1883 del_gendisk(g);
1884
1885 ide_floppy_put(floppy);
1886 }
1887
1888 static void ide_floppy_release(struct kref *kref)
1889 {
1890 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1891 ide_drive_t *drive = floppy->drive;
1892 struct gendisk *g = floppy->disk;
1893
1894 drive->driver_data = NULL;
1895 g->private_data = NULL;
1896 put_disk(g);
1897 kfree(floppy);
1898 }
1899
1900 #ifdef CONFIG_IDE_PROC_FS
1901 static int proc_idefloppy_read_capacity
1902 (char *page, char **start, off_t off, int count, int *eof, void *data)
1903 {
1904 ide_drive_t*drive = (ide_drive_t *)data;
1905 int len;
1906
1907 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1908 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1909 }
1910
1911 static ide_proc_entry_t idefloppy_proc[] = {
1912 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
1913 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
1914 { NULL, 0, NULL, NULL }
1915 };
1916 #endif /* CONFIG_IDE_PROC_FS */
1917
1918 static int ide_floppy_probe(ide_drive_t *);
1919
1920 static ide_driver_t idefloppy_driver = {
1921 .gen_driver = {
1922 .owner = THIS_MODULE,
1923 .name = "ide-floppy",
1924 .bus = &ide_bus_type,
1925 },
1926 .probe = ide_floppy_probe,
1927 .remove = ide_floppy_remove,
1928 .version = IDEFLOPPY_VERSION,
1929 .media = ide_floppy,
1930 .supports_dsc_overlap = 0,
1931 .do_request = idefloppy_do_request,
1932 .end_request = idefloppy_do_end_request,
1933 .error = __ide_error,
1934 .abort = __ide_abort,
1935 #ifdef CONFIG_IDE_PROC_FS
1936 .proc = idefloppy_proc,
1937 #endif
1938 };
1939
1940 static int idefloppy_open(struct inode *inode, struct file *filp)
1941 {
1942 struct gendisk *disk = inode->i_bdev->bd_disk;
1943 struct ide_floppy_obj *floppy;
1944 ide_drive_t *drive;
1945 idefloppy_pc_t pc;
1946 int ret = 0;
1947
1948 debug_log(KERN_INFO "Reached idefloppy_open\n");
1949
1950 if (!(floppy = ide_floppy_get(disk)))
1951 return -ENXIO;
1952
1953 drive = floppy->drive;
1954
1955 floppy->openers++;
1956
1957 if (floppy->openers == 1) {
1958 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1959 /* Just in case */
1960
1961 idefloppy_create_test_unit_ready_cmd(&pc);
1962 if (idefloppy_queue_pc_tail(drive, &pc)) {
1963 idefloppy_create_start_stop_cmd(&pc, 1);
1964 (void) idefloppy_queue_pc_tail(drive, &pc);
1965 }
1966
1967 if (idefloppy_get_capacity (drive)
1968 && (filp->f_flags & O_NDELAY) == 0
1969 /*
1970 ** Allow O_NDELAY to open a drive without a disk, or with
1971 ** an unreadable disk, so that we can get the format
1972 ** capacity of the drive or begin the format - Sam
1973 */
1974 ) {
1975 ret = -EIO;
1976 goto out_put_floppy;
1977 }
1978
1979 if (floppy->wp && (filp->f_mode & 2)) {
1980 ret = -EROFS;
1981 goto out_put_floppy;
1982 }
1983 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1984 /* IOMEGA Clik! drives do not support lock/unlock commands */
1985 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1986 idefloppy_create_prevent_cmd(&pc, 1);
1987 (void) idefloppy_queue_pc_tail(drive, &pc);
1988 }
1989 check_disk_change(inode->i_bdev);
1990 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1991 ret = -EBUSY;
1992 goto out_put_floppy;
1993 }
1994 return 0;
1995
1996 out_put_floppy:
1997 floppy->openers--;
1998 ide_floppy_put(floppy);
1999 return ret;
2000 }
2001
2002 static int idefloppy_release(struct inode *inode, struct file *filp)
2003 {
2004 struct gendisk *disk = inode->i_bdev->bd_disk;
2005 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2006 ide_drive_t *drive = floppy->drive;
2007 idefloppy_pc_t pc;
2008
2009 debug_log(KERN_INFO "Reached idefloppy_release\n");
2010
2011 if (floppy->openers == 1) {
2012 /* IOMEGA Clik! drives do not support lock/unlock commands */
2013 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2014 idefloppy_create_prevent_cmd(&pc, 0);
2015 (void) idefloppy_queue_pc_tail(drive, &pc);
2016 }
2017
2018 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2019 }
2020
2021 floppy->openers--;
2022
2023 ide_floppy_put(floppy);
2024
2025 return 0;
2026 }
2027
2028 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
2029 {
2030 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2031 ide_drive_t *drive = floppy->drive;
2032
2033 geo->heads = drive->bios_head;
2034 geo->sectors = drive->bios_sect;
2035 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
2036 return 0;
2037 }
2038
2039 static int idefloppy_ioctl(struct inode *inode, struct file *file,
2040 unsigned int cmd, unsigned long arg)
2041 {
2042 struct block_device *bdev = inode->i_bdev;
2043 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2044 ide_drive_t *drive = floppy->drive;
2045 void __user *argp = (void __user *)arg;
2046 int err;
2047 int prevent = (arg) ? 1 : 0;
2048 idefloppy_pc_t pc;
2049
2050 switch (cmd) {
2051 case CDROMEJECT:
2052 prevent = 0;
2053 /* fall through */
2054 case CDROM_LOCKDOOR:
2055 if (floppy->openers > 1)
2056 return -EBUSY;
2057
2058 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2059 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2060 idefloppy_create_prevent_cmd(&pc, prevent);
2061 (void) idefloppy_queue_pc_tail(drive, &pc);
2062 }
2063 if (cmd == CDROMEJECT) {
2064 idefloppy_create_start_stop_cmd(&pc, 2);
2065 (void) idefloppy_queue_pc_tail(drive, &pc);
2066 }
2067 return 0;
2068 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2069 return 0;
2070 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2071 return idefloppy_get_format_capacities(drive, argp);
2072 case IDEFLOPPY_IOCTL_FORMAT_START:
2073
2074 if (!(file->f_mode & 2))
2075 return -EPERM;
2076
2077 if (floppy->openers > 1) {
2078 /* Don't format if someone is using the disk */
2079
2080 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2081 &floppy->flags);
2082 return -EBUSY;
2083 }
2084
2085 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2086
2087 err = idefloppy_begin_format(drive, argp);
2088 if (err)
2089 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2090 return err;
2091 /*
2092 ** Note, the bit will be cleared when the device is
2093 ** closed. This is the cleanest way to handle the
2094 ** situation where the drive does not support
2095 ** format progress reporting.
2096 */
2097 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2098 return idefloppy_get_format_progress(drive, argp);
2099 }
2100
2101 /*
2102 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
2103 * and CDROM_SEND_PACKET (legacy) ioctls
2104 */
2105 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
2106 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
2107 bdev->bd_disk, cmd, argp);
2108 else
2109 err = -ENOTTY;
2110
2111 if (err == -ENOTTY)
2112 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
2113
2114 return err;
2115 }
2116
2117 static int idefloppy_media_changed(struct gendisk *disk)
2118 {
2119 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2120 ide_drive_t *drive = floppy->drive;
2121
2122 /* do not scan partitions twice if this is a removable device */
2123 if (drive->attach) {
2124 drive->attach = 0;
2125 return 0;
2126 }
2127 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2128 }
2129
2130 static int idefloppy_revalidate_disk(struct gendisk *disk)
2131 {
2132 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2133 set_capacity(disk, idefloppy_capacity(floppy->drive));
2134 return 0;
2135 }
2136
2137 static struct block_device_operations idefloppy_ops = {
2138 .owner = THIS_MODULE,
2139 .open = idefloppy_open,
2140 .release = idefloppy_release,
2141 .ioctl = idefloppy_ioctl,
2142 .getgeo = idefloppy_getgeo,
2143 .media_changed = idefloppy_media_changed,
2144 .revalidate_disk= idefloppy_revalidate_disk
2145 };
2146
2147 static int ide_floppy_probe(ide_drive_t *drive)
2148 {
2149 idefloppy_floppy_t *floppy;
2150 struct gendisk *g;
2151
2152 if (!strstr("ide-floppy", drive->driver_req))
2153 goto failed;
2154 if (!drive->present)
2155 goto failed;
2156 if (drive->media != ide_floppy)
2157 goto failed;
2158 if (!idefloppy_identify_device (drive, drive->id)) {
2159 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2160 goto failed;
2161 }
2162 if (drive->scsi) {
2163 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2164 goto failed;
2165 }
2166 if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2167 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2168 goto failed;
2169 }
2170
2171 g = alloc_disk(1 << PARTN_BITS);
2172 if (!g)
2173 goto out_free_floppy;
2174
2175 ide_init_disk(g, drive);
2176
2177 ide_proc_register_driver(drive, &idefloppy_driver);
2178
2179 kref_init(&floppy->kref);
2180
2181 floppy->drive = drive;
2182 floppy->driver = &idefloppy_driver;
2183 floppy->disk = g;
2184
2185 g->private_data = &floppy->driver;
2186
2187 drive->driver_data = floppy;
2188
2189 idefloppy_setup (drive, floppy);
2190
2191 g->minors = 1 << PARTN_BITS;
2192 g->driverfs_dev = &drive->gendev;
2193 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2194 g->fops = &idefloppy_ops;
2195 drive->attach = 1;
2196 add_disk(g);
2197 return 0;
2198
2199 out_free_floppy:
2200 kfree(floppy);
2201 failed:
2202 return -ENODEV;
2203 }
2204
2205 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2206
2207 static void __exit idefloppy_exit (void)
2208 {
2209 driver_unregister(&idefloppy_driver.gen_driver);
2210 }
2211
2212 static int __init idefloppy_init(void)
2213 {
2214 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2215 return driver_register(&idefloppy_driver.gen_driver);
2216 }
2217
2218 MODULE_ALIAS("ide:*m-floppy*");
2219 module_init(idefloppy_init);
2220 module_exit(idefloppy_exit);
2221 MODULE_LICENSE("GPL");
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