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x86_64: Don't use softirq safe locks in smp_call_function
[pv_ops_mirror.git] / drivers / ide / ide-floppy.c
blobae8e1a64b8ad54dfceda739c979646ceb3d47f7b
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 bio *bio;
610 unsigned long flags;
611 char *data;
612 int count, i, done = 0;
613
614 rq_for_each_bio(bio, rq) {
615 bio_for_each_segment(bvec, bio, i) {
616 if (!bcount)
617 break;
618
619 count = min(bvec->bv_len, bcount);
620
621 data = bvec_kmap_irq(bvec, &flags);
622 drive->hwif->atapi_input_bytes(drive, data, count);
623 bvec_kunmap_irq(data, &flags);
624
625 bcount -= count;
626 pc->b_count += count;
627 done += count;
628 }
629 }
630
631 idefloppy_do_end_request(drive, 1, done >> 9);
632
633 if (bcount) {
634 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
635 idefloppy_discard_data(drive, bcount);
636 }
637 }
638
639 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
640 {
641 struct request *rq = pc->rq;
642 struct bio *bio;
643 struct bio_vec *bvec;
644 unsigned long flags;
645 int count, i, done = 0;
646 char *data;
647
648 rq_for_each_bio(bio, rq) {
649 bio_for_each_segment(bvec, bio, i) {
650 if (!bcount)
651 break;
652
653 count = min(bvec->bv_len, bcount);
654
655 data = bvec_kmap_irq(bvec, &flags);
656 drive->hwif->atapi_output_bytes(drive, data, count);
657 bvec_kunmap_irq(data, &flags);
658
659 bcount -= count;
660 pc->b_count += count;
661 done += count;
662 }
663 }
664
665 idefloppy_do_end_request(drive, 1, done >> 9);
666
667 #if IDEFLOPPY_DEBUG_BUGS
668 if (bcount) {
669 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
670 idefloppy_write_zeros(drive, bcount);
671 }
672 #endif
673 }
674
675 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
676 {
677 struct request *rq = pc->rq;
678 struct bio *bio = rq->bio;
679
680 while ((bio = rq->bio) != NULL)
681 idefloppy_do_end_request(drive, 1, 0);
682 }
683
684 /*
685 * idefloppy_queue_pc_head generates a new packet command request in front
686 * of the request queue, before the current request, so that it will be
687 * processed immediately, on the next pass through the driver.
688 */
689 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
690 {
691 struct ide_floppy_obj *floppy = drive->driver_data;
692
693 ide_init_drive_cmd(rq);
694 rq->buffer = (char *) pc;
695 rq->cmd_type = REQ_TYPE_SPECIAL;
696 rq->rq_disk = floppy->disk;
697 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
698 }
699
700 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
701 {
702 idefloppy_floppy_t *floppy = drive->driver_data;
703
704 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
705 floppy->pc_stack_index=0;
706 return (&floppy->pc_stack[floppy->pc_stack_index++]);
707 }
708
709 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
710 {
711 idefloppy_floppy_t *floppy = drive->driver_data;
712
713 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
714 floppy->rq_stack_index = 0;
715 return (&floppy->rq_stack[floppy->rq_stack_index++]);
716 }
717
718 /*
719 * idefloppy_analyze_error is called on each failed packet command retry
720 * to analyze the request sense.
721 */
722 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
723 {
724 idefloppy_floppy_t *floppy = drive->driver_data;
725
726 floppy->sense_key = result->sense_key;
727 floppy->asc = result->asc;
728 floppy->ascq = result->ascq;
729 floppy->progress_indication = result->sksv[0] & 0x80 ?
730 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
731 if (floppy->failed_pc)
732 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
733 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
734 result->sense_key, result->asc, result->ascq);
735 else
736 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
737 "ascq = %x\n", result->sense_key,
738 result->asc, result->ascq);
739 }
740
741 static void idefloppy_request_sense_callback (ide_drive_t *drive)
742 {
743 idefloppy_floppy_t *floppy = drive->driver_data;
744
745 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
746
747 if (!floppy->pc->error) {
748 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
749 idefloppy_do_end_request(drive, 1, 0);
750 } else {
751 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
752 idefloppy_do_end_request(drive, 0, 0);
753 }
754 }
755
756 /*
757 * General packet command callback function.
758 */
759 static void idefloppy_pc_callback (ide_drive_t *drive)
760 {
761 idefloppy_floppy_t *floppy = drive->driver_data;
762
763 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
764
765 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
766 }
767
768 /*
769 * idefloppy_init_pc initializes a packet command.
770 */
771 static void idefloppy_init_pc (idefloppy_pc_t *pc)
772 {
773 memset(pc->c, 0, 12);
774 pc->retries = 0;
775 pc->flags = 0;
776 pc->request_transfer = 0;
777 pc->buffer = pc->pc_buffer;
778 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
779 pc->callback = &idefloppy_pc_callback;
780 }
781
782 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
783 {
784 idefloppy_init_pc(pc);
785 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
786 pc->c[4] = 255;
787 pc->request_transfer = 18;
788 pc->callback = &idefloppy_request_sense_callback;
789 }
790
791 /*
792 * idefloppy_retry_pc is called when an error was detected during the
793 * last packet command. We queue a request sense packet command in
794 * the head of the request list.
795 */
796 static void idefloppy_retry_pc (ide_drive_t *drive)
797 {
798 idefloppy_pc_t *pc;
799 struct request *rq;
800 atapi_error_t error;
801
802 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
803 pc = idefloppy_next_pc_storage(drive);
804 rq = idefloppy_next_rq_storage(drive);
805 idefloppy_create_request_sense_cmd(pc);
806 idefloppy_queue_pc_head(drive, pc, rq);
807 }
808
809 /*
810 * idefloppy_pc_intr is the usual interrupt handler which will be called
811 * during a packet command.
812 */
813 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
814 {
815 idefloppy_floppy_t *floppy = drive->driver_data;
816 atapi_status_t status;
817 atapi_bcount_t bcount;
818 atapi_ireason_t ireason;
819 idefloppy_pc_t *pc = floppy->pc;
820 struct request *rq = pc->rq;
821 unsigned int temp;
822
823 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
824 __FUNCTION__);
825
826 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
827 if (HWIF(drive)->ide_dma_end(drive)) {
828 set_bit(PC_DMA_ERROR, &pc->flags);
829 } else {
830 pc->actually_transferred = pc->request_transfer;
831 idefloppy_update_buffers(drive, pc);
832 }
833 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
834 }
835
836 /* Clear the interrupt */
837 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
838
839 if (!status.b.drq) { /* No more interrupts */
840 debug_log(KERN_INFO "Packet command completed, %d bytes "
841 "transferred\n", pc->actually_transferred);
842 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
843
844 local_irq_enable_in_hardirq();
845
846 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
847 /* Error detected */
848 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
849 drive->name);
850 rq->errors++;
851 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
852 printk(KERN_ERR "ide-floppy: I/O error in "
853 "request sense command\n");
854 return ide_do_reset(drive);
855 }
856 /* Retry operation */
857 idefloppy_retry_pc(drive);
858 /* queued, but not started */
859 return ide_stopped;
860 }
861 pc->error = 0;
862 if (floppy->failed_pc == pc)
863 floppy->failed_pc = NULL;
864 /* Command finished - Call the callback function */
865 pc->callback(drive);
866 return ide_stopped;
867 }
868
869 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
870 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
871 "more interrupts in DMA mode\n");
872 ide_dma_off(drive);
873 return ide_do_reset(drive);
874 }
875
876 /* Get the number of bytes to transfer */
877 bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
878 bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
879 /* on this interrupt */
880 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
881
882 if (ireason.b.cod) {
883 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
884 return ide_do_reset(drive);
885 }
886 if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
887 /* Hopefully, we will never get here */
888 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
889 ireason.b.io ? "Write":"Read");
890 printk(KERN_ERR "but the floppy wants us to %s !\n",
891 ireason.b.io ? "Read":"Write");
892 return ide_do_reset(drive);
893 }
894 if (!test_bit(PC_WRITING, &pc->flags)) {
895 /* Reading - Check that we have enough space */
896 temp = pc->actually_transferred + bcount.all;
897 if (temp > pc->request_transfer) {
898 if (temp > pc->buffer_size) {
899 printk(KERN_ERR "ide-floppy: The floppy wants "
900 "to send us more data than expected "
901 "- discarding data\n");
902 idefloppy_discard_data(drive,bcount.all);
903 BUG_ON(HWGROUP(drive)->handler != NULL);
904 ide_set_handler(drive,
905 &idefloppy_pc_intr,
906 IDEFLOPPY_WAIT_CMD,
907 NULL);
908 return ide_started;
909 }
910 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
911 "send us more data than expected - "
912 "allowing transfer\n");
913 }
914 }
915 if (test_bit(PC_WRITING, &pc->flags)) {
916 if (pc->buffer != NULL)
917 /* Write the current buffer */
918 HWIF(drive)->atapi_output_bytes(drive,
919 pc->current_position,
920 bcount.all);
921 else
922 idefloppy_output_buffers(drive, pc, bcount.all);
923 } else {
924 if (pc->buffer != NULL)
925 /* Read the current buffer */
926 HWIF(drive)->atapi_input_bytes(drive,
927 pc->current_position,
928 bcount.all);
929 else
930 idefloppy_input_buffers(drive, pc, bcount.all);
931 }
932 /* Update the current position */
933 pc->actually_transferred += bcount.all;
934 pc->current_position += bcount.all;
935
936 BUG_ON(HWGROUP(drive)->handler != NULL);
937 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */
938 return ide_started;
939 }
940
941 /*
942 * This is the original routine that did the packet transfer.
943 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
944 * for that drive below. The algorithm is chosen based on drive type
945 */
946 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
947 {
948 ide_startstop_t startstop;
949 idefloppy_floppy_t *floppy = drive->driver_data;
950 atapi_ireason_t ireason;
951
952 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
953 printk(KERN_ERR "ide-floppy: Strange, packet command "
954 "initiated yet DRQ isn't asserted\n");
955 return startstop;
956 }
957 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
958 if (!ireason.b.cod || ireason.b.io) {
959 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
960 "issuing a packet command\n");
961 return ide_do_reset(drive);
962 }
963 BUG_ON(HWGROUP(drive)->handler != NULL);
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 BUG_ON(HWGROUP(drive)->handler != NULL);
1020 ide_set_handler(drive,
1021 &idefloppy_pc_intr, /* service routine for packet command */
1022 floppy->ticks, /* wait this long before "failing" */
1023 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */
1024 return ide_started;
1025 }
1026
1027 /**
1028 * idefloppy_should_report_error()
1029 *
1030 * Supresses error messages resulting from Medium not present
1031 */
1032 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1033 {
1034 if (floppy->sense_key == 0x02 &&
1035 floppy->asc == 0x3a &&
1036 floppy->ascq == 0x00)
1037 return 0;
1038 return 1;
1039 }
1040
1041 /*
1042 * Issue a packet command
1043 */
1044 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1045 {
1046 idefloppy_floppy_t *floppy = drive->driver_data;
1047 ide_hwif_t *hwif = drive->hwif;
1048 atapi_feature_t feature;
1049 atapi_bcount_t bcount;
1050 ide_handler_t *pkt_xfer_routine;
1051
1052 #if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone
1053 and have lived on another thread's stack; that stack may have become
1054 unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */
1055 #if IDEFLOPPY_DEBUG_BUGS
1056 if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD &&
1057 pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
1058 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - "
1059 "Two request sense in serial were issued\n");
1060 }
1061 #endif /* IDEFLOPPY_DEBUG_BUGS */
1062 #endif
1063
1064 if (floppy->failed_pc == NULL &&
1065 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1066 floppy->failed_pc = pc;
1067 /* Set the current packet command */
1068 floppy->pc = pc;
1069
1070 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1071 test_bit(PC_ABORT, &pc->flags)) {
1072 /*
1073 * We will "abort" retrying a packet command in case
1074 * a legitimate error code was received.
1075 */
1076 if (!test_bit(PC_ABORT, &pc->flags)) {
1077 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1078 if (idefloppy_should_report_error(floppy))
1079 printk(KERN_ERR "ide-floppy: %s: I/O error, "
1080 "pc = %2x, key = %2x, "
1081 "asc = %2x, ascq = %2x\n",
1082 drive->name, pc->c[0],
1083 floppy->sense_key,
1084 floppy->asc, floppy->ascq);
1085 }
1086 /* Giving up */
1087 pc->error = IDEFLOPPY_ERROR_GENERAL;
1088 }
1089 floppy->failed_pc = NULL;
1090 pc->callback(drive);
1091 return ide_stopped;
1092 }
1093
1094 debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1095
1096 pc->retries++;
1097 /* We haven't transferred any data yet */
1098 pc->actually_transferred = 0;
1099 pc->current_position = pc->buffer;
1100 bcount.all = min(pc->request_transfer, 63 * 1024);
1101
1102 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
1103 ide_dma_off(drive);
1104
1105 feature.all = 0;
1106
1107 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1108 feature.b.dma = !hwif->dma_setup(drive);
1109
1110 if (IDE_CONTROL_REG)
1111 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1112 /* Use PIO/DMA */
1113 HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
1114 HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
1115 HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
1116 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1117
1118 if (feature.b.dma) { /* Begin DMA, if necessary */
1119 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1120 hwif->dma_start(drive);
1121 }
1122
1123 /* Can we transfer the packet when we get the interrupt or wait? */
1124 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1125 /* wait */
1126 pkt_xfer_routine = &idefloppy_transfer_pc1;
1127 } else {
1128 /* immediate */
1129 pkt_xfer_routine = &idefloppy_transfer_pc;
1130 }
1131
1132 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1133 /* Issue the packet command */
1134 ide_execute_command(drive, WIN_PACKETCMD,
1135 pkt_xfer_routine,
1136 IDEFLOPPY_WAIT_CMD,
1137 NULL);
1138 return ide_started;
1139 } else {
1140 /* Issue the packet command */
1141 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1142 return (*pkt_xfer_routine) (drive);
1143 }
1144 }
1145
1146 static void idefloppy_rw_callback (ide_drive_t *drive)
1147 {
1148 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1149
1150 idefloppy_do_end_request(drive, 1, 0);
1151 return;
1152 }
1153
1154 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1155 {
1156 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1157 "prevent = %d\n", prevent);
1158
1159 idefloppy_init_pc(pc);
1160 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1161 pc->c[4] = prevent;
1162 }
1163
1164 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1165 {
1166 idefloppy_init_pc(pc);
1167 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1168 pc->c[7] = 255;
1169 pc->c[8] = 255;
1170 pc->request_transfer = 255;
1171 }
1172
1173 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1174 int flags)
1175 {
1176 idefloppy_init_pc(pc);
1177 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1178 pc->c[1] = 0x17;
1179
1180 memset(pc->buffer, 0, 12);
1181 pc->buffer[1] = 0xA2;
1182 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1183
1184 if (flags & 1) /* Verify bit on... */
1185 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */
1186 pc->buffer[3] = 8;
1187
1188 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1189 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1190 pc->buffer_size=12;
1191 set_bit(PC_WRITING, &pc->flags);
1192 }
1193
1194 /*
1195 * A mode sense command is used to "sense" floppy parameters.
1196 */
1197 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1198 {
1199 u16 length = sizeof(idefloppy_mode_parameter_header_t);
1200
1201 idefloppy_init_pc(pc);
1202 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1203 pc->c[1] = 0;
1204 pc->c[2] = page_code + (type << 6);
1205
1206 switch (page_code) {
1207 case IDEFLOPPY_CAPABILITIES_PAGE:
1208 length += 12;
1209 break;
1210 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1211 length += 32;
1212 break;
1213 default:
1214 printk(KERN_ERR "ide-floppy: unsupported page code "
1215 "in create_mode_sense_cmd\n");
1216 }
1217 put_unaligned(htons(length), (u16 *) &pc->c[7]);
1218 pc->request_transfer = length;
1219 }
1220
1221 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1222 {
1223 idefloppy_init_pc(pc);
1224 pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1225 pc->c[4] = start;
1226 }
1227
1228 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1229 {
1230 idefloppy_init_pc(pc);
1231 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1232 }
1233
1234 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1235 {
1236 int block = sector / floppy->bs_factor;
1237 int blocks = rq->nr_sectors / floppy->bs_factor;
1238 int cmd = rq_data_dir(rq);
1239
1240 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1241 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1242 block, blocks);
1243
1244 idefloppy_init_pc(pc);
1245 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1246 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1247 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1248 } else {
1249 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1250 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1251 }
1252 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1253 pc->callback = &idefloppy_rw_callback;
1254 pc->rq = rq;
1255 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1256 if (rq->cmd_flags & REQ_RW)
1257 set_bit(PC_WRITING, &pc->flags);
1258 pc->buffer = NULL;
1259 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1260 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1261 }
1262
1263 static void
1264 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1265 {
1266 idefloppy_init_pc(pc);
1267 pc->callback = &idefloppy_rw_callback;
1268 memcpy(pc->c, rq->cmd, sizeof(pc->c));
1269 pc->rq = rq;
1270 pc->b_count = rq->data_len;
1271 if (rq->data_len && rq_data_dir(rq) == WRITE)
1272 set_bit(PC_WRITING, &pc->flags);
1273 pc->buffer = rq->data;
1274 if (rq->bio)
1275 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1276
1277 /*
1278 * possibly problematic, doesn't look like ide-floppy correctly
1279 * handled scattered requests if dma fails...
1280 */
1281 pc->request_transfer = pc->buffer_size = rq->data_len;
1282 }
1283
1284 /*
1285 * idefloppy_do_request is our request handling function.
1286 */
1287 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1288 {
1289 idefloppy_floppy_t *floppy = drive->driver_data;
1290 idefloppy_pc_t *pc;
1291 unsigned long block = (unsigned long)block_s;
1292
1293 debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
1294 rq->rq_disk ? rq->rq_disk->disk_name : "?",
1295 rq->flags, rq->errors);
1296 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1297 "current_nr_sectors: %d\n", (long)rq->sector,
1298 rq->nr_sectors, rq->current_nr_sectors);
1299
1300 if (rq->errors >= ERROR_MAX) {
1301 if (floppy->failed_pc != NULL) {
1302 if (idefloppy_should_report_error(floppy))
1303 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1304 " key = %2x, asc = %2x, ascq = %2x\n",
1305 drive->name, floppy->failed_pc->c[0],
1306 floppy->sense_key, floppy->asc, floppy->ascq);
1307 }
1308 else
1309 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1310 drive->name);
1311 idefloppy_do_end_request(drive, 0, 0);
1312 return ide_stopped;
1313 }
1314 if (blk_fs_request(rq)) {
1315 if (((long)rq->sector % floppy->bs_factor) ||
1316 (rq->nr_sectors % floppy->bs_factor)) {
1317 printk("%s: unsupported r/w request size\n",
1318 drive->name);
1319 idefloppy_do_end_request(drive, 0, 0);
1320 return ide_stopped;
1321 }
1322 pc = idefloppy_next_pc_storage(drive);
1323 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1324 } else if (blk_special_request(rq)) {
1325 pc = (idefloppy_pc_t *) rq->buffer;
1326 } else if (blk_pc_request(rq)) {
1327 pc = idefloppy_next_pc_storage(drive);
1328 idefloppy_blockpc_cmd(floppy, pc, rq);
1329 } else {
1330 blk_dump_rq_flags(rq,
1331 "ide-floppy: unsupported command in queue");
1332 idefloppy_do_end_request(drive, 0, 0);
1333 return ide_stopped;
1334 }
1335
1336 pc->rq = rq;
1337 return idefloppy_issue_pc(drive, pc);
1338 }
1339
1340 /*
1341 * idefloppy_queue_pc_tail adds a special packet command request to the
1342 * tail of the request queue, and waits for it to be serviced.
1343 */
1344 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1345 {
1346 struct ide_floppy_obj *floppy = drive->driver_data;
1347 struct request rq;
1348
1349 ide_init_drive_cmd (&rq);
1350 rq.buffer = (char *) pc;
1351 rq.cmd_type = REQ_TYPE_SPECIAL;
1352 rq.rq_disk = floppy->disk;
1353
1354 return ide_do_drive_cmd(drive, &rq, ide_wait);
1355 }
1356
1357 /*
1358 * Look at the flexible disk page parameters. We will ignore the CHS
1359 * capacity parameters and use the LBA parameters instead.
1360 */
1361 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1362 {
1363 idefloppy_floppy_t *floppy = drive->driver_data;
1364 idefloppy_pc_t pc;
1365 idefloppy_mode_parameter_header_t *header;
1366 idefloppy_flexible_disk_page_t *page;
1367 int capacity, lba_capacity;
1368
1369 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1370 if (idefloppy_queue_pc_tail(drive,&pc)) {
1371 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1372 "page parameters\n");
1373 return 1;
1374 }
1375 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1376 floppy->wp = header->wp;
1377 set_disk_ro(floppy->disk, floppy->wp);
1378 page = (idefloppy_flexible_disk_page_t *) (header + 1);
1379
1380 page->transfer_rate = ntohs(page->transfer_rate);
1381 page->sector_size = ntohs(page->sector_size);
1382 page->cyls = ntohs(page->cyls);
1383 page->rpm = ntohs(page->rpm);
1384 capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1385 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1386 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1387 "%d sector size, %d rpm\n",
1388 drive->name, capacity / 1024, page->cyls,
1389 page->heads, page->sectors,
1390 page->transfer_rate / 8, page->sector_size, page->rpm);
1391
1392 floppy->flexible_disk_page = *page;
1393 drive->bios_cyl = page->cyls;
1394 drive->bios_head = page->heads;
1395 drive->bios_sect = page->sectors;
1396 lba_capacity = floppy->blocks * floppy->block_size;
1397 if (capacity < lba_capacity) {
1398 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1399 "bytes, but the drive only handles %d\n",
1400 drive->name, lba_capacity, capacity);
1401 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1402 }
1403 return 0;
1404 }
1405
1406 static int idefloppy_get_capability_page(ide_drive_t *drive)
1407 {
1408 idefloppy_floppy_t *floppy = drive->driver_data;
1409 idefloppy_pc_t pc;
1410 idefloppy_mode_parameter_header_t *header;
1411 idefloppy_capabilities_page_t *page;
1412
1413 floppy->srfp = 0;
1414 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1415 MODE_SENSE_CURRENT);
1416
1417 set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1418 if (idefloppy_queue_pc_tail(drive,&pc)) {
1419 return 1;
1420 }
1421
1422 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1423 page= (idefloppy_capabilities_page_t *)(header+1);
1424 floppy->srfp = page->srfp;
1425 return (0);
1426 }
1427
1428 /*
1429 * Determine if a media is present in the floppy drive, and if so,
1430 * its LBA capacity.
1431 */
1432 static int idefloppy_get_capacity (ide_drive_t *drive)
1433 {
1434 idefloppy_floppy_t *floppy = drive->driver_data;
1435 idefloppy_pc_t pc;
1436 idefloppy_capacity_header_t *header;
1437 idefloppy_capacity_descriptor_t *descriptor;
1438 int i, descriptors, rc = 1, blocks, length;
1439
1440 drive->bios_cyl = 0;
1441 drive->bios_head = drive->bios_sect = 0;
1442 floppy->blocks = 0;
1443 floppy->bs_factor = 1;
1444 set_capacity(floppy->disk, 0);
1445
1446 idefloppy_create_read_capacity_cmd(&pc);
1447 if (idefloppy_queue_pc_tail(drive, &pc)) {
1448 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1449 return 1;
1450 }
1451 header = (idefloppy_capacity_header_t *) pc.buffer;
1452 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1453 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1454
1455 for (i = 0; i < descriptors; i++, descriptor++) {
1456 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1457 length = descriptor->length = ntohs(descriptor->length);
1458
1459 if (!i)
1460 {
1461 switch (descriptor->dc) {
1462 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1463 case CAPACITY_UNFORMATTED:
1464 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1465 /*
1466 * If it is not a clik drive, break out
1467 * (maintains previous driver behaviour)
1468 */
1469 break;
1470 case CAPACITY_CURRENT:
1471 /* Normal Zip/LS-120 disks */
1472 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1473 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1474 "sector size\n", drive->name,
1475 blocks * length / 1024, blocks, length);
1476 floppy->capacity = *descriptor;
1477 if (!length || length % 512) {
1478 printk(KERN_NOTICE "%s: %d bytes block size "
1479 "not supported\n", drive->name, length);
1480 } else {
1481 floppy->blocks = blocks;
1482 floppy->block_size = length;
1483 if ((floppy->bs_factor = length / 512) != 1)
1484 printk(KERN_NOTICE "%s: warning: non "
1485 "512 bytes block size not "
1486 "fully supported\n",
1487 drive->name);
1488 rc = 0;
1489 }
1490 break;
1491 case CAPACITY_NO_CARTRIDGE:
1492 /*
1493 * This is a KERN_ERR so it appears on screen
1494 * for the user to see
1495 */
1496 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1497 break;
1498 case CAPACITY_INVALID:
1499 printk(KERN_ERR "%s: Invalid capacity for disk "
1500 "in drive\n", drive->name);
1501 break;
1502 }
1503 }
1504 if (!i) {
1505 debug_log( "Descriptor 0 Code: %d\n",
1506 descriptor->dc);
1507 }
1508 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1509 "sector size\n", i, blocks * length / 1024, blocks,
1510 length);
1511 }
1512
1513 /* Clik! disk does not support get_flexible_disk_page */
1514 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1515 (void) idefloppy_get_flexible_disk_page(drive);
1516 }
1517
1518 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1519 return rc;
1520 }
1521
1522 /*
1523 ** Obtain the list of formattable capacities.
1524 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1525 ** descriptors to userland, instead of our own structures.
1526 **
1527 ** Userland gives us the following structure:
1528 **
1529 ** struct idefloppy_format_capacities {
1530 ** int nformats;
1531 ** struct {
1532 ** int nblocks;
1533 ** int blocksize;
1534 ** } formats[];
1535 ** } ;
1536 **
1537 ** userland initializes nformats to the number of allocated formats[]
1538 ** records. On exit we set nformats to the number of records we've
1539 ** actually initialized.
1540 **
1541 */
1542
1543 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1544 {
1545 idefloppy_pc_t pc;
1546 idefloppy_capacity_header_t *header;
1547 idefloppy_capacity_descriptor_t *descriptor;
1548 int i, descriptors, blocks, length;
1549 int u_array_size;
1550 int u_index;
1551 int __user *argp;
1552
1553 if (get_user(u_array_size, arg))
1554 return (-EFAULT);
1555
1556 if (u_array_size <= 0)
1557 return (-EINVAL);
1558
1559 idefloppy_create_read_capacity_cmd(&pc);
1560 if (idefloppy_queue_pc_tail(drive, &pc)) {
1561 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1562 return (-EIO);
1563 }
1564 header = (idefloppy_capacity_header_t *) pc.buffer;
1565 descriptors = header->length /
1566 sizeof(idefloppy_capacity_descriptor_t);
1567 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1568
1569 u_index = 0;
1570 argp = arg + 1;
1571
1572 /*
1573 ** We always skip the first capacity descriptor. That's the
1574 ** current capacity. We are interested in the remaining descriptors,
1575 ** the formattable capacities.
1576 */
1577
1578 for (i=0; i<descriptors; i++, descriptor++) {
1579 if (u_index >= u_array_size)
1580 break; /* User-supplied buffer too small */
1581 if (i == 0)
1582 continue; /* Skip the first descriptor */
1583
1584 blocks = ntohl(descriptor->blocks);
1585 length = ntohs(descriptor->length);
1586
1587 if (put_user(blocks, argp))
1588 return(-EFAULT);
1589 ++argp;
1590
1591 if (put_user(length, argp))
1592 return (-EFAULT);
1593 ++argp;
1594
1595 ++u_index;
1596 }
1597
1598 if (put_user(u_index, arg))
1599 return (-EFAULT);
1600 return (0);
1601 }
1602
1603 /*
1604 ** Send ATAPI_FORMAT_UNIT to the drive.
1605 **
1606 ** Userland gives us the following structure:
1607 **
1608 ** struct idefloppy_format_command {
1609 ** int nblocks;
1610 ** int blocksize;
1611 ** int flags;
1612 ** } ;
1613 **
1614 ** flags is a bitmask, currently, the only defined flag is:
1615 **
1616 ** 0x01 - verify media after format.
1617 */
1618
1619 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1620 {
1621 int blocks;
1622 int length;
1623 int flags;
1624 idefloppy_pc_t pc;
1625
1626 if (get_user(blocks, arg) ||
1627 get_user(length, arg+1) ||
1628 get_user(flags, arg+2)) {
1629 return (-EFAULT);
1630 }
1631
1632 /* Get the SFRP bit */
1633 (void) idefloppy_get_capability_page(drive);
1634 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1635 if (idefloppy_queue_pc_tail(drive, &pc)) {
1636 return (-EIO);
1637 }
1638
1639 return (0);
1640 }
1641
1642 /*
1643 ** Get ATAPI_FORMAT_UNIT progress indication.
1644 **
1645 ** Userland gives a pointer to an int. The int is set to a progress
1646 ** indicator 0-65536, with 65536=100%.
1647 **
1648 ** If the drive does not support format progress indication, we just check
1649 ** the dsc bit, and return either 0 or 65536.
1650 */
1651
1652 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1653 {
1654 idefloppy_floppy_t *floppy = drive->driver_data;
1655 idefloppy_pc_t pc;
1656 int progress_indication = 0x10000;
1657
1658 if (floppy->srfp) {
1659 idefloppy_create_request_sense_cmd(&pc);
1660 if (idefloppy_queue_pc_tail(drive, &pc)) {
1661 return (-EIO);
1662 }
1663
1664 if (floppy->sense_key == 2 &&
1665 floppy->asc == 4 &&
1666 floppy->ascq == 4) {
1667 progress_indication = floppy->progress_indication;
1668 }
1669 /* Else assume format_unit has finished, and we're
1670 ** at 0x10000 */
1671 } else {
1672 atapi_status_t status;
1673 unsigned long flags;
1674
1675 local_irq_save(flags);
1676 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
1677 local_irq_restore(flags);
1678
1679 progress_indication = !status.b.dsc ? 0 : 0x10000;
1680 }
1681 if (put_user(progress_indication, arg))
1682 return (-EFAULT);
1683
1684 return (0);
1685 }
1686
1687 /*
1688 * Return the current floppy capacity.
1689 */
1690 static sector_t idefloppy_capacity (ide_drive_t *drive)
1691 {
1692 idefloppy_floppy_t *floppy = drive->driver_data;
1693 unsigned long capacity = floppy->blocks * floppy->bs_factor;
1694
1695 return capacity;
1696 }
1697
1698 /*
1699 * idefloppy_identify_device checks if we can support a drive,
1700 * based on the ATAPI IDENTIFY command results.
1701 */
1702 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1703 {
1704 struct idefloppy_id_gcw gcw;
1705 #if IDEFLOPPY_DEBUG_INFO
1706 u16 mask,i;
1707 char buffer[80];
1708 #endif /* IDEFLOPPY_DEBUG_INFO */
1709
1710 *((u16 *) &gcw) = id->config;
1711
1712 #ifdef CONFIG_PPC
1713 /* kludge for Apple PowerBook internal zip */
1714 if ((gcw.device_type == 5) &&
1715 !strstr(id->model, "CD-ROM") &&
1716 strstr(id->model, "ZIP"))
1717 gcw.device_type = 0;
1718 #endif
1719
1720 #if IDEFLOPPY_DEBUG_INFO
1721 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1722 switch (gcw.protocol) {
1723 case 0: case 1: sprintf(buffer, "ATA");break;
1724 case 2: sprintf(buffer, "ATAPI");break;
1725 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1726 }
1727 printk(KERN_INFO "Protocol Type: %s\n", buffer);
1728 switch (gcw.device_type) {
1729 case 0: sprintf(buffer, "Direct-access Device");break;
1730 case 1: sprintf(buffer, "Streaming Tape Device");break;
1731 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1732 case 5: sprintf(buffer, "CD-ROM Device");break;
1733 case 6: sprintf(buffer, "Reserved");
1734 case 7: sprintf(buffer, "Optical memory Device");break;
1735 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1736 default: sprintf(buffer, "Reserved");
1737 }
1738 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1739 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1740 switch (gcw.drq_type) {
1741 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1742 case 1: sprintf(buffer, "Interrupt DRQ");break;
1743 case 2: sprintf(buffer, "Accelerated DRQ");break;
1744 case 3: sprintf(buffer, "Reserved");break;
1745 }
1746 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1747 switch (gcw.packet_size) {
1748 case 0: sprintf(buffer, "12 bytes");break;
1749 case 1: sprintf(buffer, "16 bytes");break;
1750 default: sprintf(buffer, "Reserved");break;
1751 }
1752 printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1753 printk(KERN_INFO "Model: %.40s\n",id->model);
1754 printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1755 printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1756 printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1757 printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1758 printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1759 printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1760 printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1761 printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1762 printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1763 printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1764 printk(KERN_INFO "Single Word DMA supported modes:\n");
1765 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1766 if (id->dma_1word & mask)
1767 printk(KERN_INFO " Mode %d%s\n", i,
1768 (id->dma_1word & (mask << 8)) ? " (active)" : "");
1769 }
1770 printk(KERN_INFO "Multi Word DMA supported modes:\n");
1771 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1772 if (id->dma_mword & mask)
1773 printk(KERN_INFO " Mode %d%s\n", i,
1774 (id->dma_mword & (mask << 8)) ? " (active)" : "");
1775 }
1776 if (id->field_valid & 0x0002) {
1777 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1778 id->eide_pio_modes & 1 ? "Mode 3":"None");
1779 if (id->eide_dma_min == 0)
1780 sprintf(buffer, "Not supported");
1781 else
1782 sprintf(buffer, "%d ns",id->eide_dma_min);
1783 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1784 if (id->eide_dma_time == 0)
1785 sprintf(buffer, "Not supported");
1786 else
1787 sprintf(buffer, "%d ns",id->eide_dma_time);
1788 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1789 if (id->eide_pio == 0)
1790 sprintf(buffer, "Not supported");
1791 else
1792 sprintf(buffer, "%d ns",id->eide_pio);
1793 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1794 buffer);
1795 if (id->eide_pio_iordy == 0)
1796 sprintf(buffer, "Not supported");
1797 else
1798 sprintf(buffer, "%d ns",id->eide_pio_iordy);
1799 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1800 } else
1801 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1802 #endif /* IDEFLOPPY_DEBUG_INFO */
1803
1804 if (gcw.protocol != 2)
1805 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1806 else if (gcw.device_type != 0)
1807 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1808 else if (!gcw.removable)
1809 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1810 else if (gcw.drq_type == 3) {
1811 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1812 } else if (gcw.packet_size != 0) {
1813 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1814 } else
1815 return 1;
1816 return 0;
1817 }
1818
1819 #ifdef CONFIG_IDE_PROC_FS
1820 static void idefloppy_add_settings(ide_drive_t *drive)
1821 {
1822 idefloppy_floppy_t *floppy = drive->driver_data;
1823
1824 /*
1825 * drive setting name read/write data type min max mul_factor div_factor data pointer set function
1826 */
1827 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
1828 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
1829 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
1830 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL);
1831 }
1832 #else
1833 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1834 #endif
1835
1836 /*
1837 * Driver initialization.
1838 */
1839 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1840 {
1841 struct idefloppy_id_gcw gcw;
1842
1843 *((u16 *) &gcw) = drive->id->config;
1844 floppy->pc = floppy->pc_stack;
1845 if (gcw.drq_type == 1)
1846 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1847 /*
1848 * We used to check revisions here. At this point however
1849 * I'm giving up. Just assume they are all broken, its easier.
1850 *
1851 * The actual reason for the workarounds was likely
1852 * a driver bug after all rather than a firmware bug,
1853 * and the workaround below used to hide it. It should
1854 * be fixed as of version 1.9, but to be on the safe side
1855 * we'll leave the limitation below for the 2.2.x tree.
1856 */
1857
1858 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1859 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1860 /* This value will be visible in the /proc/ide/hdx/settings */
1861 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1862 blk_queue_max_sectors(drive->queue, 64);
1863 }
1864
1865 /*
1866 * Guess what? The IOMEGA Clik! drive also needs the
1867 * above fix. It makes nasty clicking noises without
1868 * it, so please don't remove this.
1869 */
1870 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1871 blk_queue_max_sectors(drive->queue, 64);
1872 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1873 }
1874
1875
1876 (void) idefloppy_get_capacity(drive);
1877 idefloppy_add_settings(drive);
1878 }
1879
1880 static void ide_floppy_remove(ide_drive_t *drive)
1881 {
1882 idefloppy_floppy_t *floppy = drive->driver_data;
1883 struct gendisk *g = floppy->disk;
1884
1885 ide_proc_unregister_driver(drive, floppy->driver);
1886
1887 del_gendisk(g);
1888
1889 ide_floppy_put(floppy);
1890 }
1891
1892 static void ide_floppy_release(struct kref *kref)
1893 {
1894 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1895 ide_drive_t *drive = floppy->drive;
1896 struct gendisk *g = floppy->disk;
1897
1898 drive->driver_data = NULL;
1899 g->private_data = NULL;
1900 put_disk(g);
1901 kfree(floppy);
1902 }
1903
1904 #ifdef CONFIG_IDE_PROC_FS
1905 static int proc_idefloppy_read_capacity
1906 (char *page, char **start, off_t off, int count, int *eof, void *data)
1907 {
1908 ide_drive_t*drive = (ide_drive_t *)data;
1909 int len;
1910
1911 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1912 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1913 }
1914
1915 static ide_proc_entry_t idefloppy_proc[] = {
1916 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
1917 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
1918 { NULL, 0, NULL, NULL }
1919 };
1920 #endif /* CONFIG_IDE_PROC_FS */
1921
1922 static int ide_floppy_probe(ide_drive_t *);
1923
1924 static ide_driver_t idefloppy_driver = {
1925 .gen_driver = {
1926 .owner = THIS_MODULE,
1927 .name = "ide-floppy",
1928 .bus = &ide_bus_type,
1929 },
1930 .probe = ide_floppy_probe,
1931 .remove = ide_floppy_remove,
1932 .version = IDEFLOPPY_VERSION,
1933 .media = ide_floppy,
1934 .supports_dsc_overlap = 0,
1935 .do_request = idefloppy_do_request,
1936 .end_request = idefloppy_do_end_request,
1937 .error = __ide_error,
1938 .abort = __ide_abort,
1939 #ifdef CONFIG_IDE_PROC_FS
1940 .proc = idefloppy_proc,
1941 #endif
1942 };
1943
1944 static int idefloppy_open(struct inode *inode, struct file *filp)
1945 {
1946 struct gendisk *disk = inode->i_bdev->bd_disk;
1947 struct ide_floppy_obj *floppy;
1948 ide_drive_t *drive;
1949 idefloppy_pc_t pc;
1950 int ret = 0;
1951
1952 debug_log(KERN_INFO "Reached idefloppy_open\n");
1953
1954 if (!(floppy = ide_floppy_get(disk)))
1955 return -ENXIO;
1956
1957 drive = floppy->drive;
1958
1959 floppy->openers++;
1960
1961 if (floppy->openers == 1) {
1962 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1963 /* Just in case */
1964
1965 idefloppy_create_test_unit_ready_cmd(&pc);
1966 if (idefloppy_queue_pc_tail(drive, &pc)) {
1967 idefloppy_create_start_stop_cmd(&pc, 1);
1968 (void) idefloppy_queue_pc_tail(drive, &pc);
1969 }
1970
1971 if (idefloppy_get_capacity (drive)
1972 && (filp->f_flags & O_NDELAY) == 0
1973 /*
1974 ** Allow O_NDELAY to open a drive without a disk, or with
1975 ** an unreadable disk, so that we can get the format
1976 ** capacity of the drive or begin the format - Sam
1977 */
1978 ) {
1979 ret = -EIO;
1980 goto out_put_floppy;
1981 }
1982
1983 if (floppy->wp && (filp->f_mode & 2)) {
1984 ret = -EROFS;
1985 goto out_put_floppy;
1986 }
1987 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1988 /* IOMEGA Clik! drives do not support lock/unlock commands */
1989 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1990 idefloppy_create_prevent_cmd(&pc, 1);
1991 (void) idefloppy_queue_pc_tail(drive, &pc);
1992 }
1993 check_disk_change(inode->i_bdev);
1994 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1995 ret = -EBUSY;
1996 goto out_put_floppy;
1997 }
1998 return 0;
1999
2000 out_put_floppy:
2001 floppy->openers--;
2002 ide_floppy_put(floppy);
2003 return ret;
2004 }
2005
2006 static int idefloppy_release(struct inode *inode, struct file *filp)
2007 {
2008 struct gendisk *disk = inode->i_bdev->bd_disk;
2009 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2010 ide_drive_t *drive = floppy->drive;
2011 idefloppy_pc_t pc;
2012
2013 debug_log(KERN_INFO "Reached idefloppy_release\n");
2014
2015 if (floppy->openers == 1) {
2016 /* IOMEGA Clik! drives do not support lock/unlock commands */
2017 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2018 idefloppy_create_prevent_cmd(&pc, 0);
2019 (void) idefloppy_queue_pc_tail(drive, &pc);
2020 }
2021
2022 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2023 }
2024
2025 floppy->openers--;
2026
2027 ide_floppy_put(floppy);
2028
2029 return 0;
2030 }
2031
2032 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
2033 {
2034 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2035 ide_drive_t *drive = floppy->drive;
2036
2037 geo->heads = drive->bios_head;
2038 geo->sectors = drive->bios_sect;
2039 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
2040 return 0;
2041 }
2042
2043 static int idefloppy_ioctl(struct inode *inode, struct file *file,
2044 unsigned int cmd, unsigned long arg)
2045 {
2046 struct block_device *bdev = inode->i_bdev;
2047 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2048 ide_drive_t *drive = floppy->drive;
2049 void __user *argp = (void __user *)arg;
2050 int err;
2051 int prevent = (arg) ? 1 : 0;
2052 idefloppy_pc_t pc;
2053
2054 switch (cmd) {
2055 case CDROMEJECT:
2056 prevent = 0;
2057 /* fall through */
2058 case CDROM_LOCKDOOR:
2059 if (floppy->openers > 1)
2060 return -EBUSY;
2061
2062 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2063 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2064 idefloppy_create_prevent_cmd(&pc, prevent);
2065 (void) idefloppy_queue_pc_tail(drive, &pc);
2066 }
2067 if (cmd == CDROMEJECT) {
2068 idefloppy_create_start_stop_cmd(&pc, 2);
2069 (void) idefloppy_queue_pc_tail(drive, &pc);
2070 }
2071 return 0;
2072 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2073 return 0;
2074 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2075 return idefloppy_get_format_capacities(drive, argp);
2076 case IDEFLOPPY_IOCTL_FORMAT_START:
2077
2078 if (!(file->f_mode & 2))
2079 return -EPERM;
2080
2081 if (floppy->openers > 1) {
2082 /* Don't format if someone is using the disk */
2083
2084 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2085 &floppy->flags);
2086 return -EBUSY;
2087 }
2088
2089 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2090
2091 err = idefloppy_begin_format(drive, argp);
2092 if (err)
2093 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2094 return err;
2095 /*
2096 ** Note, the bit will be cleared when the device is
2097 ** closed. This is the cleanest way to handle the
2098 ** situation where the drive does not support
2099 ** format progress reporting.
2100 */
2101 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2102 return idefloppy_get_format_progress(drive, argp);
2103 }
2104
2105 /*
2106 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
2107 * and CDROM_SEND_PACKET (legacy) ioctls
2108 */
2109 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
2110 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
2111 bdev->bd_disk, cmd, argp);
2112 else
2113 err = -ENOTTY;
2114
2115 if (err == -ENOTTY)
2116 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
2117
2118 return err;
2119 }
2120
2121 static int idefloppy_media_changed(struct gendisk *disk)
2122 {
2123 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2124 ide_drive_t *drive = floppy->drive;
2125
2126 /* do not scan partitions twice if this is a removable device */
2127 if (drive->attach) {
2128 drive->attach = 0;
2129 return 0;
2130 }
2131 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2132 }
2133
2134 static int idefloppy_revalidate_disk(struct gendisk *disk)
2135 {
2136 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2137 set_capacity(disk, idefloppy_capacity(floppy->drive));
2138 return 0;
2139 }
2140
2141 static struct block_device_operations idefloppy_ops = {
2142 .owner = THIS_MODULE,
2143 .open = idefloppy_open,
2144 .release = idefloppy_release,
2145 .ioctl = idefloppy_ioctl,
2146 .getgeo = idefloppy_getgeo,
2147 .media_changed = idefloppy_media_changed,
2148 .revalidate_disk= idefloppy_revalidate_disk
2149 };
2150
2151 static int ide_floppy_probe(ide_drive_t *drive)
2152 {
2153 idefloppy_floppy_t *floppy;
2154 struct gendisk *g;
2155
2156 if (!strstr("ide-floppy", drive->driver_req))
2157 goto failed;
2158 if (!drive->present)
2159 goto failed;
2160 if (drive->media != ide_floppy)
2161 goto failed;
2162 if (!idefloppy_identify_device (drive, drive->id)) {
2163 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2164 goto failed;
2165 }
2166 if (drive->scsi) {
2167 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2168 goto failed;
2169 }
2170 if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2171 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2172 goto failed;
2173 }
2174
2175 g = alloc_disk(1 << PARTN_BITS);
2176 if (!g)
2177 goto out_free_floppy;
2178
2179 ide_init_disk(g, drive);
2180
2181 ide_proc_register_driver(drive, &idefloppy_driver);
2182
2183 kref_init(&floppy->kref);
2184
2185 floppy->drive = drive;
2186 floppy->driver = &idefloppy_driver;
2187 floppy->disk = g;
2188
2189 g->private_data = &floppy->driver;
2190
2191 drive->driver_data = floppy;
2192
2193 idefloppy_setup (drive, floppy);
2194
2195 g->minors = 1 << PARTN_BITS;
2196 g->driverfs_dev = &drive->gendev;
2197 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2198 g->fops = &idefloppy_ops;
2199 drive->attach = 1;
2200 add_disk(g);
2201 return 0;
2202
2203 out_free_floppy:
2204 kfree(floppy);
2205 failed:
2206 return -ENODEV;
2207 }
2208
2209 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2210
2211 static void __exit idefloppy_exit (void)
2212 {
2213 driver_unregister(&idefloppy_driver.gen_driver);
2214 }
2215
2216 static int __init idefloppy_init(void)
2217 {
2218 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2219 return driver_register(&idefloppy_driver.gen_driver);
2220 }
2221
2222 MODULE_ALIAS("ide:*m-floppy*");
2223 module_init(idefloppy_init);
2224 module_exit(idefloppy_exit);
2225 MODULE_LICENSE("GPL");
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