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x86: cpa self-test, WARN_ON()
[wrt350n-kernel.git] / drivers / ide / ide-floppy.c
blobff8232ef96598ae784001a0a61dd2da69a91c69a
1 /*
2 * linux/drivers/ide/ide-floppy.c Version 0.99 Feb 24 2002
3 *
4 * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il>
5 * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net>
6 */
7
8 /*
9 * IDE ATAPI floppy driver.
10 *
11 * The driver currently doesn't have any fancy features, just the bare
12 * minimum read/write support.
13 *
14 * This driver supports the following IDE floppy drives:
15 *
16 * LS-120/240 SuperDisk
17 * Iomega Zip 100/250
18 * Iomega PC Card Clik!/PocketZip
19 *
20 * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many
21 * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive.
22 *
23 * Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c.
24 * Ver 0.2 Oct 31 96 Minor changes.
25 * Ver 0.3 Dec 2 96 Fixed error recovery bug.
26 * Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl.
27 * Ver 0.5 Feb 21 97 Add partitions support.
28 * Use the minimum of the LBA and CHS capacities.
29 * Avoid hwgroup->rq == NULL on the last irq.
30 * Fix potential null dereferencing with DEBUG_LOG.
31 * Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds.
32 * Add media write-protect detection.
33 * Issue START command only if TEST UNIT READY fails.
34 * Add work-around for IOMEGA ZIP revision 21.D.
35 * Remove idefloppy_get_capabilities().
36 * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of
37 * bytes requested on each interrupt to be zero.
38 * Thanks to <shanos@es.co.nz> for pointing this out.
39 * Ver 0.9.sv Jan 6 01 Sam Varshavchik <mrsam@courier-mta.com>
40 * Implement low level formatting. Reimplemented
41 * IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp
42 * bit. My LS-120 drive barfs on
43 * IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me.
44 * Compromise by not reporting a failure to get this
45 * mode page. Implemented four IOCTLs in order to
46 * implement formatting. IOCTls begin with 0x4600,
47 * 0x46 is 'F' as in Format.
48 * Jan 9 01 Userland option to select format verify.
49 * Added PC_SUPPRESS_ERROR flag - some idefloppy drives
50 * do not implement IDEFLOPPY_CAPABILITIES_PAGE, and
51 * return a sense error. Suppress error reporting in
52 * this particular case in order to avoid spurious
53 * errors in syslog. The culprit is
54 * idefloppy_get_capability_page(), so move it to
55 * idefloppy_begin_format() so that it's not used
56 * unless absolutely necessary.
57 * If drive does not support format progress indication
58 * monitor the dsc bit in the status register.
59 * Also, O_NDELAY on open will allow the device to be
60 * opened without a disk available. This can be used to
61 * open an unformatted disk, or get the device capacity.
62 * Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by
63 * <paul@paulbristow.net>
64 * Ver 0.92 Oct 22 00 Paul Bristow became official maintainer for this
65 * driver. Included Powerbook internal zip kludge.
66 * Ver 0.93 Oct 24 00 Fixed bugs for Clik! drive
67 * no disk on insert and disk change now works
68 * Ver 0.94 Oct 27 00 Tidied up to remove strstr(Clik) everywhere
69 * Ver 0.95 Nov 7 00 Brought across to kernel 2.4
70 * Ver 0.96 Jan 7 01 Actually in line with release version of 2.4.0
71 * including set_bit patch from Rusty Russell
72 * Ver 0.97 Jul 22 01 Merge 0.91-0.96 onto 0.9.sv for ac series
73 * Ver 0.97.sv Aug 3 01 Backported from 2.4.7-ac3
74 * Ver 0.98 Oct 26 01 Split idefloppy_transfer_pc into two pieces to
75 * fix a lost interrupt problem. It appears the busy
76 * bit was being deasserted by my IOMEGA ATAPI ZIP 100
77 * drive before the drive was actually ready.
78 * Ver 0.98a Oct 29 01 Expose delay value so we can play.
79 * Ver 0.99 Feb 24 02 Remove duplicate code, modify clik! detection code
80 * to support new PocketZip drives
81 */
82
83 #define IDEFLOPPY_VERSION "0.99.newide"
84
85 #include <linux/module.h>
86 #include <linux/types.h>
87 #include <linux/string.h>
88 #include <linux/kernel.h>
89 #include <linux/delay.h>
90 #include <linux/timer.h>
91 #include <linux/mm.h>
92 #include <linux/interrupt.h>
93 #include <linux/major.h>
94 #include <linux/errno.h>
95 #include <linux/genhd.h>
96 #include <linux/slab.h>
97 #include <linux/cdrom.h>
98 #include <linux/ide.h>
99 #include <linux/bitops.h>
100 #include <linux/mutex.h>
101
102 #include <scsi/scsi_ioctl.h>
103
104 #include <asm/byteorder.h>
105 #include <asm/irq.h>
106 #include <asm/uaccess.h>
107 #include <asm/io.h>
108 #include <asm/unaligned.h>
109
110 /*
111 * The following are used to debug the driver.
112 */
113 #define IDEFLOPPY_DEBUG_LOG 0
114 #define IDEFLOPPY_DEBUG_INFO 0
115 #define IDEFLOPPY_DEBUG_BUGS 1
116
117 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
118 #define IDEFLOPPY_DEBUG( fmt, args... )
119
120 #if IDEFLOPPY_DEBUG_LOG
121 #define debug_log printk
122 #else
123 #define debug_log(fmt, args... ) do {} while(0)
124 #endif
125
126
127 /*
128 * Some drives require a longer irq timeout.
129 */
130 #define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
131
132 /*
133 * After each failed packet command we issue a request sense command
134 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
135 */
136 #define IDEFLOPPY_MAX_PC_RETRIES 3
137
138 /*
139 * With each packet command, we allocate a buffer of
140 * IDEFLOPPY_PC_BUFFER_SIZE bytes.
141 */
142 #define IDEFLOPPY_PC_BUFFER_SIZE 256
143
144 /*
145 * In various places in the driver, we need to allocate storage
146 * for packet commands and requests, which will remain valid while
147 * we leave the driver to wait for an interrupt or a timeout event.
148 */
149 #define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
150
151 /*
152 * Our view of a packet command.
153 */
154 typedef struct idefloppy_packet_command_s {
155 u8 c[12]; /* Actual packet bytes */
156 int retries; /* On each retry, we increment retries */
157 int error; /* Error code */
158 int request_transfer; /* Bytes to transfer */
159 int actually_transferred; /* Bytes actually transferred */
160 int buffer_size; /* Size of our data buffer */
161 int b_count; /* Missing/Available data on the current buffer */
162 struct request *rq; /* The corresponding request */
163 u8 *buffer; /* Data buffer */
164 u8 *current_position; /* Pointer into the above buffer */
165 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */
166 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
167 unsigned long flags; /* Status/Action bit flags: long for set_bit */
168 } idefloppy_pc_t;
169
170 /*
171 * Packet command flag bits.
172 */
173 #define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */
174 #define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */
175 #define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */
176 #define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */
177 #define PC_WRITING 5 /* Data direction */
178
179 #define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */
180
181 /*
182 * Removable Block Access Capabilities Page
183 */
184 typedef struct {
185 #if defined(__LITTLE_ENDIAN_BITFIELD)
186 unsigned page_code :6; /* Page code - Should be 0x1b */
187 unsigned reserved1_6 :1; /* Reserved */
188 unsigned ps :1; /* Should be 0 */
189 #elif defined(__BIG_ENDIAN_BITFIELD)
190 unsigned ps :1; /* Should be 0 */
191 unsigned reserved1_6 :1; /* Reserved */
192 unsigned page_code :6; /* Page code - Should be 0x1b */
193 #else
194 #error "Bitfield endianness not defined! Check your byteorder.h"
195 #endif
196 u8 page_length; /* Page Length - Should be 0xa */
197 #if defined(__LITTLE_ENDIAN_BITFIELD)
198 unsigned reserved2 :6;
199 unsigned srfp :1; /* Supports reporting progress of format */
200 unsigned sflp :1; /* System floppy type device */
201 unsigned tlun :3; /* Total logical units supported by the device */
202 unsigned reserved3 :3;
203 unsigned sml :1; /* Single / Multiple lun supported */
204 unsigned ncd :1; /* Non cd optical device */
205 #elif defined(__BIG_ENDIAN_BITFIELD)
206 unsigned sflp :1; /* System floppy type device */
207 unsigned srfp :1; /* Supports reporting progress of format */
208 unsigned reserved2 :6;
209 unsigned ncd :1; /* Non cd optical device */
210 unsigned sml :1; /* Single / Multiple lun supported */
211 unsigned reserved3 :3;
212 unsigned tlun :3; /* Total logical units supported by the device */
213 #else
214 #error "Bitfield endianness not defined! Check your byteorder.h"
215 #endif
216 u8 reserved[8];
217 } idefloppy_capabilities_page_t;
218
219 /*
220 * Flexible disk page.
221 */
222 typedef struct {
223 #if defined(__LITTLE_ENDIAN_BITFIELD)
224 unsigned page_code :6; /* Page code - Should be 0x5 */
225 unsigned reserved1_6 :1; /* Reserved */
226 unsigned ps :1; /* The device is capable of saving the page */
227 #elif defined(__BIG_ENDIAN_BITFIELD)
228 unsigned ps :1; /* The device is capable of saving the page */
229 unsigned reserved1_6 :1; /* Reserved */
230 unsigned page_code :6; /* Page code - Should be 0x5 */
231 #else
232 #error "Bitfield endianness not defined! Check your byteorder.h"
233 #endif
234 u8 page_length; /* Page Length - Should be 0x1e */
235 u16 transfer_rate; /* In kilobits per second */
236 u8 heads, sectors; /* Number of heads, Number of sectors per track */
237 u16 sector_size; /* Byes per sector */
238 u16 cyls; /* Number of cylinders */
239 u8 reserved10[10];
240 u8 motor_delay; /* Motor off delay */
241 u8 reserved21[7];
242 u16 rpm; /* Rotations per minute */
243 u8 reserved30[2];
244 } idefloppy_flexible_disk_page_t;
245
246 /*
247 * Format capacity
248 */
249 typedef struct {
250 u8 reserved[3];
251 u8 length; /* Length of the following descriptors in bytes */
252 } idefloppy_capacity_header_t;
253
254 typedef struct {
255 u32 blocks; /* Number of blocks */
256 #if defined(__LITTLE_ENDIAN_BITFIELD)
257 unsigned dc :2; /* Descriptor Code */
258 unsigned reserved :6;
259 #elif defined(__BIG_ENDIAN_BITFIELD)
260 unsigned reserved :6;
261 unsigned dc :2; /* Descriptor Code */
262 #else
263 #error "Bitfield endianness not defined! Check your byteorder.h"
264 #endif
265 u8 length_msb; /* Block Length (MSB)*/
266 u16 length; /* Block Length */
267 } idefloppy_capacity_descriptor_t;
268
269 #define CAPACITY_INVALID 0x00
270 #define CAPACITY_UNFORMATTED 0x01
271 #define CAPACITY_CURRENT 0x02
272 #define CAPACITY_NO_CARTRIDGE 0x03
273
274 /*
275 * Most of our global data which we need to save even as we leave the
276 * driver due to an interrupt or a timer event is stored in a variable
277 * of type idefloppy_floppy_t, defined below.
278 */
279 typedef struct ide_floppy_obj {
280 ide_drive_t *drive;
281 ide_driver_t *driver;
282 struct gendisk *disk;
283 struct kref kref;
284 unsigned int openers; /* protected by BKL for now */
285
286 /* Current packet command */
287 idefloppy_pc_t *pc;
288 /* Last failed packet command */
289 idefloppy_pc_t *failed_pc;
290 /* Packet command stack */
291 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
292 /* Next free packet command storage space */
293 int pc_stack_index;
294 struct request rq_stack[IDEFLOPPY_PC_STACK];
295 /* We implement a circular array */
296 int rq_stack_index;
297
298 /*
299 * Last error information
300 */
301 u8 sense_key, asc, ascq;
302 /* delay this long before sending packet command */
303 u8 ticks;
304 int progress_indication;
305
306 /*
307 * Device information
308 */
309 /* Current format */
310 int blocks, block_size, bs_factor;
311 /* Last format capacity */
312 idefloppy_capacity_descriptor_t capacity;
313 /* Copy of the flexible disk page */
314 idefloppy_flexible_disk_page_t flexible_disk_page;
315 /* Write protect */
316 int wp;
317 /* Supports format progress report */
318 int srfp;
319 /* Status/Action flags */
320 unsigned long flags;
321 } idefloppy_floppy_t;
322
323 #define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
324
325 /*
326 * Floppy flag bits values.
327 */
328 #define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */
329 #define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */
330 #define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */
331 #define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */
332 #define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */
333 #define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */
334
335 /*
336 * ATAPI floppy drive packet commands
337 */
338 #define IDEFLOPPY_FORMAT_UNIT_CMD 0x04
339 #define IDEFLOPPY_INQUIRY_CMD 0x12
340 #define IDEFLOPPY_MODE_SELECT_CMD 0x55
341 #define IDEFLOPPY_MODE_SENSE_CMD 0x5a
342 #define IDEFLOPPY_READ10_CMD 0x28
343 #define IDEFLOPPY_READ12_CMD 0xa8
344 #define IDEFLOPPY_READ_CAPACITY_CMD 0x23
345 #define IDEFLOPPY_REQUEST_SENSE_CMD 0x03
346 #define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e
347 #define IDEFLOPPY_SEEK_CMD 0x2b
348 #define IDEFLOPPY_START_STOP_CMD 0x1b
349 #define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00
350 #define IDEFLOPPY_VERIFY_CMD 0x2f
351 #define IDEFLOPPY_WRITE10_CMD 0x2a
352 #define IDEFLOPPY_WRITE12_CMD 0xaa
353 #define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e
354
355 /*
356 * Defines for the mode sense command
357 */
358 #define MODE_SENSE_CURRENT 0x00
359 #define MODE_SENSE_CHANGEABLE 0x01
360 #define MODE_SENSE_DEFAULT 0x02
361 #define MODE_SENSE_SAVED 0x03
362
363 /*
364 * IOCTLs used in low-level formatting.
365 */
366
367 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600
368 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601
369 #define IDEFLOPPY_IOCTL_FORMAT_START 0x4602
370 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603
371
372 /*
373 * Error codes which are returned in rq->errors to the higher part
374 * of the driver.
375 */
376 #define IDEFLOPPY_ERROR_GENERAL 101
377
378 /*
379 * The following is used to format the general configuration word of
380 * the ATAPI IDENTIFY DEVICE command.
381 */
382 struct idefloppy_id_gcw {
383 #if defined(__LITTLE_ENDIAN_BITFIELD)
384 unsigned packet_size :2; /* Packet Size */
385 unsigned reserved234 :3; /* Reserved */
386 unsigned drq_type :2; /* Command packet DRQ type */
387 unsigned removable :1; /* Removable media */
388 unsigned device_type :5; /* Device type */
389 unsigned reserved13 :1; /* Reserved */
390 unsigned protocol :2; /* Protocol type */
391 #elif defined(__BIG_ENDIAN_BITFIELD)
392 unsigned protocol :2; /* Protocol type */
393 unsigned reserved13 :1; /* Reserved */
394 unsigned device_type :5; /* Device type */
395 unsigned removable :1; /* Removable media */
396 unsigned drq_type :2; /* Command packet DRQ type */
397 unsigned reserved234 :3; /* Reserved */
398 unsigned packet_size :2; /* Packet Size */
399 #else
400 #error "Bitfield endianness not defined! Check your byteorder.h"
401 #endif
402 };
403
404 /*
405 * INQUIRY packet command - Data Format
406 */
407 typedef struct {
408 #if defined(__LITTLE_ENDIAN_BITFIELD)
409 unsigned device_type :5; /* Peripheral Device Type */
410 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
411 unsigned reserved1_6t0 :7; /* Reserved */
412 unsigned rmb :1; /* Removable Medium Bit */
413 unsigned ansi_version :3; /* ANSI Version */
414 unsigned ecma_version :3; /* ECMA Version */
415 unsigned iso_version :2; /* ISO Version */
416 unsigned response_format :4; /* Response Data Format */
417 unsigned reserved3_45 :2; /* Reserved */
418 unsigned reserved3_6 :1; /* TrmIOP - Reserved */
419 unsigned reserved3_7 :1; /* AENC - Reserved */
420 #elif defined(__BIG_ENDIAN_BITFIELD)
421 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
422 unsigned device_type :5; /* Peripheral Device Type */
423 unsigned rmb :1; /* Removable Medium Bit */
424 unsigned reserved1_6t0 :7; /* Reserved */
425 unsigned iso_version :2; /* ISO Version */
426 unsigned ecma_version :3; /* ECMA Version */
427 unsigned ansi_version :3; /* ANSI Version */
428 unsigned reserved3_7 :1; /* AENC - Reserved */
429 unsigned reserved3_6 :1; /* TrmIOP - Reserved */
430 unsigned reserved3_45 :2; /* Reserved */
431 unsigned response_format :4; /* Response Data Format */
432 #else
433 #error "Bitfield endianness not defined! Check your byteorder.h"
434 #endif
435 u8 additional_length; /* Additional Length (total_length-4) */
436 u8 rsv5, rsv6, rsv7; /* Reserved */
437 u8 vendor_id[8]; /* Vendor Identification */
438 u8 product_id[16]; /* Product Identification */
439 u8 revision_level[4]; /* Revision Level */
440 u8 vendor_specific[20]; /* Vendor Specific - Optional */
441 u8 reserved56t95[40]; /* Reserved - Optional */
442 /* Additional information may be returned */
443 } idefloppy_inquiry_result_t;
444
445 /*
446 * REQUEST SENSE packet command result - Data Format.
447 */
448 typedef struct {
449 #if defined(__LITTLE_ENDIAN_BITFIELD)
450 unsigned error_code :7; /* Current error (0x70) */
451 unsigned valid :1; /* The information field conforms to SFF-8070i */
452 u8 reserved1 :8; /* Reserved */
453 unsigned sense_key :4; /* Sense Key */
454 unsigned reserved2_4 :1; /* Reserved */
455 unsigned ili :1; /* Incorrect Length Indicator */
456 unsigned reserved2_67 :2;
457 #elif defined(__BIG_ENDIAN_BITFIELD)
458 unsigned valid :1; /* The information field conforms to SFF-8070i */
459 unsigned error_code :7; /* Current error (0x70) */
460 u8 reserved1 :8; /* Reserved */
461 unsigned reserved2_67 :2;
462 unsigned ili :1; /* Incorrect Length Indicator */
463 unsigned reserved2_4 :1; /* Reserved */
464 unsigned sense_key :4; /* Sense Key */
465 #else
466 #error "Bitfield endianness not defined! Check your byteorder.h"
467 #endif
468 u32 information __attribute__ ((packed));
469 u8 asl; /* Additional sense length (n-7) */
470 u32 command_specific; /* Additional command specific information */
471 u8 asc; /* Additional Sense Code */
472 u8 ascq; /* Additional Sense Code Qualifier */
473 u8 replaceable_unit_code; /* Field Replaceable Unit Code */
474 u8 sksv[3];
475 u8 pad[2]; /* Padding to 20 bytes */
476 } idefloppy_request_sense_result_t;
477
478 /*
479 * Pages of the SELECT SENSE / MODE SENSE packet commands.
480 */
481 #define IDEFLOPPY_CAPABILITIES_PAGE 0x1b
482 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05
483
484 /*
485 * Mode Parameter Header for the MODE SENSE packet command
486 */
487 typedef struct {
488 u16 mode_data_length; /* Length of the following data transfer */
489 u8 medium_type; /* Medium Type */
490 #if defined(__LITTLE_ENDIAN_BITFIELD)
491 unsigned reserved3 :7;
492 unsigned wp :1; /* Write protect */
493 #elif defined(__BIG_ENDIAN_BITFIELD)
494 unsigned wp :1; /* Write protect */
495 unsigned reserved3 :7;
496 #else
497 #error "Bitfield endianness not defined! Check your byteorder.h"
498 #endif
499 u8 reserved[4];
500 } idefloppy_mode_parameter_header_t;
501
502 static DEFINE_MUTEX(idefloppy_ref_mutex);
503
504 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
505
506 #define ide_floppy_g(disk) \
507 container_of((disk)->private_data, struct ide_floppy_obj, driver)
508
509 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
510 {
511 struct ide_floppy_obj *floppy = NULL;
512
513 mutex_lock(&idefloppy_ref_mutex);
514 floppy = ide_floppy_g(disk);
515 if (floppy)
516 kref_get(&floppy->kref);
517 mutex_unlock(&idefloppy_ref_mutex);
518 return floppy;
519 }
520
521 static void ide_floppy_release(struct kref *);
522
523 static void ide_floppy_put(struct ide_floppy_obj *floppy)
524 {
525 mutex_lock(&idefloppy_ref_mutex);
526 kref_put(&floppy->kref, ide_floppy_release);
527 mutex_unlock(&idefloppy_ref_mutex);
528 }
529
530 /*
531 * Too bad. The drive wants to send us data which we are not ready to accept.
532 * Just throw it away.
533 */
534 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
535 {
536 while (bcount--)
537 (void) HWIF(drive)->INB(IDE_DATA_REG);
538 }
539
540 #if IDEFLOPPY_DEBUG_BUGS
541 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
542 {
543 while (bcount--)
544 HWIF(drive)->OUTB(0, IDE_DATA_REG);
545 }
546 #endif /* IDEFLOPPY_DEBUG_BUGS */
547
548
549 /*
550 * idefloppy_do_end_request is used to finish servicing a request.
551 *
552 * For read/write requests, we will call ide_end_request to pass to the
553 * next buffer.
554 */
555 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
556 {
557 idefloppy_floppy_t *floppy = drive->driver_data;
558 struct request *rq = HWGROUP(drive)->rq;
559 int error;
560
561 debug_log(KERN_INFO "Reached idefloppy_end_request\n");
562
563 switch (uptodate) {
564 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
565 case 1: error = 0; break;
566 default: error = uptodate;
567 }
568 if (error)
569 floppy->failed_pc = NULL;
570 /* Why does this happen? */
571 if (!rq)
572 return 0;
573 if (!blk_special_request(rq)) {
574 /* our real local end request function */
575 ide_end_request(drive, uptodate, nsecs);
576 return 0;
577 }
578 rq->errors = error;
579 /* fixme: need to move this local also */
580 ide_end_drive_cmd(drive, 0, 0);
581 return 0;
582 }
583
584 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
585 {
586 struct request *rq = pc->rq;
587 struct bio_vec *bvec;
588 struct req_iterator iter;
589 unsigned long flags;
590 char *data;
591 int count, done = 0;
592
593 rq_for_each_segment(bvec, rq, iter) {
594 if (!bcount)
595 break;
596
597 count = min(bvec->bv_len, bcount);
598
599 data = bvec_kmap_irq(bvec, &flags);
600 drive->hwif->atapi_input_bytes(drive, data, count);
601 bvec_kunmap_irq(data, &flags);
602
603 bcount -= count;
604 pc->b_count += count;
605 done += count;
606 }
607
608 idefloppy_do_end_request(drive, 1, done >> 9);
609
610 if (bcount) {
611 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
612 idefloppy_discard_data(drive, bcount);
613 }
614 }
615
616 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
617 {
618 struct request *rq = pc->rq;
619 struct req_iterator iter;
620 struct bio_vec *bvec;
621 unsigned long flags;
622 int count, done = 0;
623 char *data;
624
625 rq_for_each_segment(bvec, rq, iter) {
626 if (!bcount)
627 break;
628
629 count = min(bvec->bv_len, bcount);
630
631 data = bvec_kmap_irq(bvec, &flags);
632 drive->hwif->atapi_output_bytes(drive, data, count);
633 bvec_kunmap_irq(data, &flags);
634
635 bcount -= count;
636 pc->b_count += count;
637 done += count;
638 }
639
640 idefloppy_do_end_request(drive, 1, done >> 9);
641
642 #if IDEFLOPPY_DEBUG_BUGS
643 if (bcount) {
644 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
645 idefloppy_write_zeros(drive, bcount);
646 }
647 #endif
648 }
649
650 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
651 {
652 struct request *rq = pc->rq;
653 struct bio *bio = rq->bio;
654
655 while ((bio = rq->bio) != NULL)
656 idefloppy_do_end_request(drive, 1, 0);
657 }
658
659 /*
660 * idefloppy_queue_pc_head generates a new packet command request in front
661 * of the request queue, before the current request, so that it will be
662 * processed immediately, on the next pass through the driver.
663 */
664 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
665 {
666 struct ide_floppy_obj *floppy = drive->driver_data;
667
668 ide_init_drive_cmd(rq);
669 rq->buffer = (char *) pc;
670 rq->cmd_type = REQ_TYPE_SPECIAL;
671 rq->rq_disk = floppy->disk;
672 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
673 }
674
675 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
676 {
677 idefloppy_floppy_t *floppy = drive->driver_data;
678
679 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
680 floppy->pc_stack_index=0;
681 return (&floppy->pc_stack[floppy->pc_stack_index++]);
682 }
683
684 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
685 {
686 idefloppy_floppy_t *floppy = drive->driver_data;
687
688 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
689 floppy->rq_stack_index = 0;
690 return (&floppy->rq_stack[floppy->rq_stack_index++]);
691 }
692
693 /*
694 * idefloppy_analyze_error is called on each failed packet command retry
695 * to analyze the request sense.
696 */
697 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
698 {
699 idefloppy_floppy_t *floppy = drive->driver_data;
700
701 floppy->sense_key = result->sense_key;
702 floppy->asc = result->asc;
703 floppy->ascq = result->ascq;
704 floppy->progress_indication = result->sksv[0] & 0x80 ?
705 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
706 if (floppy->failed_pc)
707 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
708 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
709 result->sense_key, result->asc, result->ascq);
710 else
711 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
712 "ascq = %x\n", result->sense_key,
713 result->asc, result->ascq);
714 }
715
716 static void idefloppy_request_sense_callback (ide_drive_t *drive)
717 {
718 idefloppy_floppy_t *floppy = drive->driver_data;
719
720 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
721
722 if (!floppy->pc->error) {
723 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
724 idefloppy_do_end_request(drive, 1, 0);
725 } else {
726 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
727 idefloppy_do_end_request(drive, 0, 0);
728 }
729 }
730
731 /*
732 * General packet command callback function.
733 */
734 static void idefloppy_pc_callback (ide_drive_t *drive)
735 {
736 idefloppy_floppy_t *floppy = drive->driver_data;
737
738 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
739
740 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
741 }
742
743 /*
744 * idefloppy_init_pc initializes a packet command.
745 */
746 static void idefloppy_init_pc (idefloppy_pc_t *pc)
747 {
748 memset(pc->c, 0, 12);
749 pc->retries = 0;
750 pc->flags = 0;
751 pc->request_transfer = 0;
752 pc->buffer = pc->pc_buffer;
753 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
754 pc->callback = &idefloppy_pc_callback;
755 }
756
757 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
758 {
759 idefloppy_init_pc(pc);
760 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
761 pc->c[4] = 255;
762 pc->request_transfer = 18;
763 pc->callback = &idefloppy_request_sense_callback;
764 }
765
766 /*
767 * idefloppy_retry_pc is called when an error was detected during the
768 * last packet command. We queue a request sense packet command in
769 * the head of the request list.
770 */
771 static void idefloppy_retry_pc (ide_drive_t *drive)
772 {
773 idefloppy_pc_t *pc;
774 struct request *rq;
775
776 (void)drive->hwif->INB(IDE_ERROR_REG);
777 pc = idefloppy_next_pc_storage(drive);
778 rq = idefloppy_next_rq_storage(drive);
779 idefloppy_create_request_sense_cmd(pc);
780 idefloppy_queue_pc_head(drive, pc, rq);
781 }
782
783 /*
784 * idefloppy_pc_intr is the usual interrupt handler which will be called
785 * during a packet command.
786 */
787 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
788 {
789 idefloppy_floppy_t *floppy = drive->driver_data;
790 ide_hwif_t *hwif = drive->hwif;
791 idefloppy_pc_t *pc = floppy->pc;
792 struct request *rq = pc->rq;
793 unsigned int temp;
794 u16 bcount;
795 u8 stat, ireason;
796
797 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
798 __FUNCTION__);
799
800 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
801 if (HWIF(drive)->ide_dma_end(drive)) {
802 set_bit(PC_DMA_ERROR, &pc->flags);
803 } else {
804 pc->actually_transferred = pc->request_transfer;
805 idefloppy_update_buffers(drive, pc);
806 }
807 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
808 }
809
810 /* Clear the interrupt */
811 stat = drive->hwif->INB(IDE_STATUS_REG);
812
813 if ((stat & DRQ_STAT) == 0) { /* No more interrupts */
814 debug_log(KERN_INFO "Packet command completed, %d bytes "
815 "transferred\n", pc->actually_transferred);
816 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
817
818 local_irq_enable_in_hardirq();
819
820 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
821 /* Error detected */
822 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
823 drive->name);
824 rq->errors++;
825 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
826 printk(KERN_ERR "ide-floppy: I/O error in "
827 "request sense command\n");
828 return ide_do_reset(drive);
829 }
830 /* Retry operation */
831 idefloppy_retry_pc(drive);
832 /* queued, but not started */
833 return ide_stopped;
834 }
835 pc->error = 0;
836 if (floppy->failed_pc == pc)
837 floppy->failed_pc = NULL;
838 /* Command finished - Call the callback function */
839 pc->callback(drive);
840 return ide_stopped;
841 }
842
843 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
844 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
845 "more interrupts in DMA mode\n");
846 ide_dma_off(drive);
847 return ide_do_reset(drive);
848 }
849
850 /* Get the number of bytes to transfer */
851 bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
852 hwif->INB(IDE_BCOUNTL_REG);
853 /* on this interrupt */
854 ireason = hwif->INB(IDE_IREASON_REG);
855
856 if (ireason & CD) {
857 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
858 return ide_do_reset(drive);
859 }
860 if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
861 /* Hopefully, we will never get here */
862 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
863 (ireason & IO) ? "Write" : "Read");
864 printk(KERN_ERR "but the floppy wants us to %s !\n",
865 (ireason & IO) ? "Read" : "Write");
866 return ide_do_reset(drive);
867 }
868 if (!test_bit(PC_WRITING, &pc->flags)) {
869 /* Reading - Check that we have enough space */
870 temp = pc->actually_transferred + bcount;
871 if (temp > pc->request_transfer) {
872 if (temp > pc->buffer_size) {
873 printk(KERN_ERR "ide-floppy: The floppy wants "
874 "to send us more data than expected "
875 "- discarding data\n");
876 idefloppy_discard_data(drive, bcount);
877 BUG_ON(HWGROUP(drive)->handler != NULL);
878 ide_set_handler(drive,
879 &idefloppy_pc_intr,
880 IDEFLOPPY_WAIT_CMD,
881 NULL);
882 return ide_started;
883 }
884 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
885 "send us more data than expected - "
886 "allowing transfer\n");
887 }
888 }
889 if (test_bit(PC_WRITING, &pc->flags)) {
890 if (pc->buffer != NULL)
891 /* Write the current buffer */
892 hwif->atapi_output_bytes(drive, pc->current_position,
893 bcount);
894 else
895 idefloppy_output_buffers(drive, pc, bcount);
896 } else {
897 if (pc->buffer != NULL)
898 /* Read the current buffer */
899 hwif->atapi_input_bytes(drive, pc->current_position,
900 bcount);
901 else
902 idefloppy_input_buffers(drive, pc, bcount);
903 }
904 /* Update the current position */
905 pc->actually_transferred += bcount;
906 pc->current_position += bcount;
907
908 BUG_ON(HWGROUP(drive)->handler != NULL);
909 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */
910 return ide_started;
911 }
912
913 /*
914 * This is the original routine that did the packet transfer.
915 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
916 * for that drive below. The algorithm is chosen based on drive type
917 */
918 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
919 {
920 ide_startstop_t startstop;
921 idefloppy_floppy_t *floppy = drive->driver_data;
922 u8 ireason;
923
924 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
925 printk(KERN_ERR "ide-floppy: Strange, packet command "
926 "initiated yet DRQ isn't asserted\n");
927 return startstop;
928 }
929 ireason = drive->hwif->INB(IDE_IREASON_REG);
930 if ((ireason & CD) == 0 || (ireason & IO)) {
931 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
932 "issuing a packet command\n");
933 return ide_do_reset(drive);
934 }
935 BUG_ON(HWGROUP(drive)->handler != NULL);
936 /* Set the interrupt routine */
937 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
938 /* Send the actual packet */
939 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
940 return ide_started;
941 }
942
943
944 /*
945 * What we have here is a classic case of a top half / bottom half
946 * interrupt service routine. In interrupt mode, the device sends
947 * an interrupt to signal it's ready to receive a packet. However,
948 * we need to delay about 2-3 ticks before issuing the packet or we
949 * gets in trouble.
950 *
951 * So, follow carefully. transfer_pc1 is called as an interrupt (or
952 * directly). In either case, when the device says it's ready for a
953 * packet, we schedule the packet transfer to occur about 2-3 ticks
954 * later in transfer_pc2.
955 */
956 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
957 {
958 idefloppy_floppy_t *floppy = drive->driver_data;
959
960 /* Send the actual packet */
961 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
962 /* Timeout for the packet command */
963 return IDEFLOPPY_WAIT_CMD;
964 }
965
966 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
967 {
968 idefloppy_floppy_t *floppy = drive->driver_data;
969 ide_startstop_t startstop;
970 u8 ireason;
971
972 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
973 printk(KERN_ERR "ide-floppy: Strange, packet command "
974 "initiated yet DRQ isn't asserted\n");
975 return startstop;
976 }
977 ireason = drive->hwif->INB(IDE_IREASON_REG);
978 if ((ireason & CD) == 0 || (ireason & IO)) {
979 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
980 "while issuing a packet command\n");
981 return ide_do_reset(drive);
982 }
983 /*
984 * The following delay solves a problem with ATAPI Zip 100 drives
985 * where the Busy flag was apparently being deasserted before the
986 * unit was ready to receive data. This was happening on a
987 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
988 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
989 * used until after the packet is moved in about 50 msec.
990 */
991 BUG_ON(HWGROUP(drive)->handler != NULL);
992 ide_set_handler(drive,
993 &idefloppy_pc_intr, /* service routine for packet command */
994 floppy->ticks, /* wait this long before "failing" */
995 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */
996 return ide_started;
997 }
998
999 /**
1000 * idefloppy_should_report_error()
1001 *
1002 * Supresses error messages resulting from Medium not present
1003 */
1004 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1005 {
1006 if (floppy->sense_key == 0x02 &&
1007 floppy->asc == 0x3a &&
1008 floppy->ascq == 0x00)
1009 return 0;
1010 return 1;
1011 }
1012
1013 /*
1014 * Issue a packet command
1015 */
1016 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1017 {
1018 idefloppy_floppy_t *floppy = drive->driver_data;
1019 ide_hwif_t *hwif = drive->hwif;
1020 ide_handler_t *pkt_xfer_routine;
1021 u16 bcount;
1022 u8 dma;
1023
1024 if (floppy->failed_pc == NULL &&
1025 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1026 floppy->failed_pc = pc;
1027 /* Set the current packet command */
1028 floppy->pc = pc;
1029
1030 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1031 test_bit(PC_ABORT, &pc->flags)) {
1032 /*
1033 * We will "abort" retrying a packet command in case
1034 * a legitimate error code was received.
1035 */
1036 if (!test_bit(PC_ABORT, &pc->flags)) {
1037 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1038 if (idefloppy_should_report_error(floppy))
1039 printk(KERN_ERR "ide-floppy: %s: I/O error, "
1040 "pc = %2x, key = %2x, "
1041 "asc = %2x, ascq = %2x\n",
1042 drive->name, pc->c[0],
1043 floppy->sense_key,
1044 floppy->asc, floppy->ascq);
1045 }
1046 /* Giving up */
1047 pc->error = IDEFLOPPY_ERROR_GENERAL;
1048 }
1049 floppy->failed_pc = NULL;
1050 pc->callback(drive);
1051 return ide_stopped;
1052 }
1053
1054 debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1055
1056 pc->retries++;
1057 /* We haven't transferred any data yet */
1058 pc->actually_transferred = 0;
1059 pc->current_position = pc->buffer;
1060 bcount = min(pc->request_transfer, 63 * 1024);
1061
1062 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
1063 ide_dma_off(drive);
1064
1065 dma = 0;
1066
1067 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1068 dma = !hwif->dma_setup(drive);
1069
1070 ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
1071 IDE_TFLAG_OUT_DEVICE, bcount, dma);
1072
1073 if (dma) { /* Begin DMA, if necessary */
1074 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1075 hwif->dma_start(drive);
1076 }
1077
1078 /* Can we transfer the packet when we get the interrupt or wait? */
1079 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1080 /* wait */
1081 pkt_xfer_routine = &idefloppy_transfer_pc1;
1082 } else {
1083 /* immediate */
1084 pkt_xfer_routine = &idefloppy_transfer_pc;
1085 }
1086
1087 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1088 /* Issue the packet command */
1089 ide_execute_command(drive, WIN_PACKETCMD,
1090 pkt_xfer_routine,
1091 IDEFLOPPY_WAIT_CMD,
1092 NULL);
1093 return ide_started;
1094 } else {
1095 /* Issue the packet command */
1096 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1097 return (*pkt_xfer_routine) (drive);
1098 }
1099 }
1100
1101 static void idefloppy_rw_callback (ide_drive_t *drive)
1102 {
1103 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1104
1105 idefloppy_do_end_request(drive, 1, 0);
1106 return;
1107 }
1108
1109 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1110 {
1111 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1112 "prevent = %d\n", prevent);
1113
1114 idefloppy_init_pc(pc);
1115 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1116 pc->c[4] = prevent;
1117 }
1118
1119 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1120 {
1121 idefloppy_init_pc(pc);
1122 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1123 pc->c[7] = 255;
1124 pc->c[8] = 255;
1125 pc->request_transfer = 255;
1126 }
1127
1128 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1129 int flags)
1130 {
1131 idefloppy_init_pc(pc);
1132 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1133 pc->c[1] = 0x17;
1134
1135 memset(pc->buffer, 0, 12);
1136 pc->buffer[1] = 0xA2;
1137 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1138
1139 if (flags & 1) /* Verify bit on... */
1140 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */
1141 pc->buffer[3] = 8;
1142
1143 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1144 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1145 pc->buffer_size=12;
1146 set_bit(PC_WRITING, &pc->flags);
1147 }
1148
1149 /*
1150 * A mode sense command is used to "sense" floppy parameters.
1151 */
1152 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1153 {
1154 u16 length = sizeof(idefloppy_mode_parameter_header_t);
1155
1156 idefloppy_init_pc(pc);
1157 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1158 pc->c[1] = 0;
1159 pc->c[2] = page_code + (type << 6);
1160
1161 switch (page_code) {
1162 case IDEFLOPPY_CAPABILITIES_PAGE:
1163 length += 12;
1164 break;
1165 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1166 length += 32;
1167 break;
1168 default:
1169 printk(KERN_ERR "ide-floppy: unsupported page code "
1170 "in create_mode_sense_cmd\n");
1171 }
1172 put_unaligned(htons(length), (u16 *) &pc->c[7]);
1173 pc->request_transfer = length;
1174 }
1175
1176 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1177 {
1178 idefloppy_init_pc(pc);
1179 pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1180 pc->c[4] = start;
1181 }
1182
1183 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1184 {
1185 idefloppy_init_pc(pc);
1186 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1187 }
1188
1189 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1190 {
1191 int block = sector / floppy->bs_factor;
1192 int blocks = rq->nr_sectors / floppy->bs_factor;
1193 int cmd = rq_data_dir(rq);
1194
1195 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1196 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1197 block, blocks);
1198
1199 idefloppy_init_pc(pc);
1200 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1201 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1202 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1203 } else {
1204 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1205 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1206 }
1207 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1208 pc->callback = &idefloppy_rw_callback;
1209 pc->rq = rq;
1210 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1211 if (rq->cmd_flags & REQ_RW)
1212 set_bit(PC_WRITING, &pc->flags);
1213 pc->buffer = NULL;
1214 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1215 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1216 }
1217
1218 static void
1219 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1220 {
1221 idefloppy_init_pc(pc);
1222 pc->callback = &idefloppy_rw_callback;
1223 memcpy(pc->c, rq->cmd, sizeof(pc->c));
1224 pc->rq = rq;
1225 pc->b_count = rq->data_len;
1226 if (rq->data_len && rq_data_dir(rq) == WRITE)
1227 set_bit(PC_WRITING, &pc->flags);
1228 pc->buffer = rq->data;
1229 if (rq->bio)
1230 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1231
1232 /*
1233 * possibly problematic, doesn't look like ide-floppy correctly
1234 * handled scattered requests if dma fails...
1235 */
1236 pc->request_transfer = pc->buffer_size = rq->data_len;
1237 }
1238
1239 /*
1240 * idefloppy_do_request is our request handling function.
1241 */
1242 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1243 {
1244 idefloppy_floppy_t *floppy = drive->driver_data;
1245 idefloppy_pc_t *pc;
1246 unsigned long block = (unsigned long)block_s;
1247
1248 debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
1249 rq->rq_disk ? rq->rq_disk->disk_name : "?",
1250 rq->flags, rq->errors);
1251 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1252 "current_nr_sectors: %d\n", (long)rq->sector,
1253 rq->nr_sectors, rq->current_nr_sectors);
1254
1255 if (rq->errors >= ERROR_MAX) {
1256 if (floppy->failed_pc != NULL) {
1257 if (idefloppy_should_report_error(floppy))
1258 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1259 " key = %2x, asc = %2x, ascq = %2x\n",
1260 drive->name, floppy->failed_pc->c[0],
1261 floppy->sense_key, floppy->asc, floppy->ascq);
1262 }
1263 else
1264 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1265 drive->name);
1266 idefloppy_do_end_request(drive, 0, 0);
1267 return ide_stopped;
1268 }
1269 if (blk_fs_request(rq)) {
1270 if (((long)rq->sector % floppy->bs_factor) ||
1271 (rq->nr_sectors % floppy->bs_factor)) {
1272 printk("%s: unsupported r/w request size\n",
1273 drive->name);
1274 idefloppy_do_end_request(drive, 0, 0);
1275 return ide_stopped;
1276 }
1277 pc = idefloppy_next_pc_storage(drive);
1278 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1279 } else if (blk_special_request(rq)) {
1280 pc = (idefloppy_pc_t *) rq->buffer;
1281 } else if (blk_pc_request(rq)) {
1282 pc = idefloppy_next_pc_storage(drive);
1283 idefloppy_blockpc_cmd(floppy, pc, rq);
1284 } else {
1285 blk_dump_rq_flags(rq,
1286 "ide-floppy: unsupported command in queue");
1287 idefloppy_do_end_request(drive, 0, 0);
1288 return ide_stopped;
1289 }
1290
1291 pc->rq = rq;
1292 return idefloppy_issue_pc(drive, pc);
1293 }
1294
1295 /*
1296 * idefloppy_queue_pc_tail adds a special packet command request to the
1297 * tail of the request queue, and waits for it to be serviced.
1298 */
1299 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1300 {
1301 struct ide_floppy_obj *floppy = drive->driver_data;
1302 struct request rq;
1303
1304 ide_init_drive_cmd (&rq);
1305 rq.buffer = (char *) pc;
1306 rq.cmd_type = REQ_TYPE_SPECIAL;
1307 rq.rq_disk = floppy->disk;
1308
1309 return ide_do_drive_cmd(drive, &rq, ide_wait);
1310 }
1311
1312 /*
1313 * Look at the flexible disk page parameters. We will ignore the CHS
1314 * capacity parameters and use the LBA parameters instead.
1315 */
1316 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1317 {
1318 idefloppy_floppy_t *floppy = drive->driver_data;
1319 idefloppy_pc_t pc;
1320 idefloppy_mode_parameter_header_t *header;
1321 idefloppy_flexible_disk_page_t *page;
1322 int capacity, lba_capacity;
1323
1324 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1325 if (idefloppy_queue_pc_tail(drive,&pc)) {
1326 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1327 "page parameters\n");
1328 return 1;
1329 }
1330 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1331 floppy->wp = header->wp;
1332 set_disk_ro(floppy->disk, floppy->wp);
1333 page = (idefloppy_flexible_disk_page_t *) (header + 1);
1334
1335 page->transfer_rate = ntohs(page->transfer_rate);
1336 page->sector_size = ntohs(page->sector_size);
1337 page->cyls = ntohs(page->cyls);
1338 page->rpm = ntohs(page->rpm);
1339 capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1340 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1341 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1342 "%d sector size, %d rpm\n",
1343 drive->name, capacity / 1024, page->cyls,
1344 page->heads, page->sectors,
1345 page->transfer_rate / 8, page->sector_size, page->rpm);
1346
1347 floppy->flexible_disk_page = *page;
1348 drive->bios_cyl = page->cyls;
1349 drive->bios_head = page->heads;
1350 drive->bios_sect = page->sectors;
1351 lba_capacity = floppy->blocks * floppy->block_size;
1352 if (capacity < lba_capacity) {
1353 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1354 "bytes, but the drive only handles %d\n",
1355 drive->name, lba_capacity, capacity);
1356 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1357 }
1358 return 0;
1359 }
1360
1361 static int idefloppy_get_capability_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_capabilities_page_t *page;
1367
1368 floppy->srfp = 0;
1369 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1370 MODE_SENSE_CURRENT);
1371
1372 set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1373 if (idefloppy_queue_pc_tail(drive,&pc)) {
1374 return 1;
1375 }
1376
1377 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1378 page= (idefloppy_capabilities_page_t *)(header+1);
1379 floppy->srfp = page->srfp;
1380 return (0);
1381 }
1382
1383 /*
1384 * Determine if a media is present in the floppy drive, and if so,
1385 * its LBA capacity.
1386 */
1387 static int idefloppy_get_capacity (ide_drive_t *drive)
1388 {
1389 idefloppy_floppy_t *floppy = drive->driver_data;
1390 idefloppy_pc_t pc;
1391 idefloppy_capacity_header_t *header;
1392 idefloppy_capacity_descriptor_t *descriptor;
1393 int i, descriptors, rc = 1, blocks, length;
1394
1395 drive->bios_cyl = 0;
1396 drive->bios_head = drive->bios_sect = 0;
1397 floppy->blocks = 0;
1398 floppy->bs_factor = 1;
1399 set_capacity(floppy->disk, 0);
1400
1401 idefloppy_create_read_capacity_cmd(&pc);
1402 if (idefloppy_queue_pc_tail(drive, &pc)) {
1403 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1404 return 1;
1405 }
1406 header = (idefloppy_capacity_header_t *) pc.buffer;
1407 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1408 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1409
1410 for (i = 0; i < descriptors; i++, descriptor++) {
1411 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1412 length = descriptor->length = ntohs(descriptor->length);
1413
1414 if (!i)
1415 {
1416 switch (descriptor->dc) {
1417 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1418 case CAPACITY_UNFORMATTED:
1419 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1420 /*
1421 * If it is not a clik drive, break out
1422 * (maintains previous driver behaviour)
1423 */
1424 break;
1425 case CAPACITY_CURRENT:
1426 /* Normal Zip/LS-120 disks */
1427 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1428 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1429 "sector size\n", drive->name,
1430 blocks * length / 1024, blocks, length);
1431 floppy->capacity = *descriptor;
1432 if (!length || length % 512) {
1433 printk(KERN_NOTICE "%s: %d bytes block size "
1434 "not supported\n", drive->name, length);
1435 } else {
1436 floppy->blocks = blocks;
1437 floppy->block_size = length;
1438 if ((floppy->bs_factor = length / 512) != 1)
1439 printk(KERN_NOTICE "%s: warning: non "
1440 "512 bytes block size not "
1441 "fully supported\n",
1442 drive->name);
1443 rc = 0;
1444 }
1445 break;
1446 case CAPACITY_NO_CARTRIDGE:
1447 /*
1448 * This is a KERN_ERR so it appears on screen
1449 * for the user to see
1450 */
1451 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1452 break;
1453 case CAPACITY_INVALID:
1454 printk(KERN_ERR "%s: Invalid capacity for disk "
1455 "in drive\n", drive->name);
1456 break;
1457 }
1458 }
1459 if (!i) {
1460 debug_log( "Descriptor 0 Code: %d\n",
1461 descriptor->dc);
1462 }
1463 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1464 "sector size\n", i, blocks * length / 1024, blocks,
1465 length);
1466 }
1467
1468 /* Clik! disk does not support get_flexible_disk_page */
1469 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1470 (void) idefloppy_get_flexible_disk_page(drive);
1471 }
1472
1473 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1474 return rc;
1475 }
1476
1477 /*
1478 ** Obtain the list of formattable capacities.
1479 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1480 ** descriptors to userland, instead of our own structures.
1481 **
1482 ** Userland gives us the following structure:
1483 **
1484 ** struct idefloppy_format_capacities {
1485 ** int nformats;
1486 ** struct {
1487 ** int nblocks;
1488 ** int blocksize;
1489 ** } formats[];
1490 ** } ;
1491 **
1492 ** userland initializes nformats to the number of allocated formats[]
1493 ** records. On exit we set nformats to the number of records we've
1494 ** actually initialized.
1495 **
1496 */
1497
1498 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1499 {
1500 idefloppy_pc_t pc;
1501 idefloppy_capacity_header_t *header;
1502 idefloppy_capacity_descriptor_t *descriptor;
1503 int i, descriptors, blocks, length;
1504 int u_array_size;
1505 int u_index;
1506 int __user *argp;
1507
1508 if (get_user(u_array_size, arg))
1509 return (-EFAULT);
1510
1511 if (u_array_size <= 0)
1512 return (-EINVAL);
1513
1514 idefloppy_create_read_capacity_cmd(&pc);
1515 if (idefloppy_queue_pc_tail(drive, &pc)) {
1516 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1517 return (-EIO);
1518 }
1519 header = (idefloppy_capacity_header_t *) pc.buffer;
1520 descriptors = header->length /
1521 sizeof(idefloppy_capacity_descriptor_t);
1522 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1523
1524 u_index = 0;
1525 argp = arg + 1;
1526
1527 /*
1528 ** We always skip the first capacity descriptor. That's the
1529 ** current capacity. We are interested in the remaining descriptors,
1530 ** the formattable capacities.
1531 */
1532
1533 for (i=0; i<descriptors; i++, descriptor++) {
1534 if (u_index >= u_array_size)
1535 break; /* User-supplied buffer too small */
1536 if (i == 0)
1537 continue; /* Skip the first descriptor */
1538
1539 blocks = ntohl(descriptor->blocks);
1540 length = ntohs(descriptor->length);
1541
1542 if (put_user(blocks, argp))
1543 return(-EFAULT);
1544 ++argp;
1545
1546 if (put_user(length, argp))
1547 return (-EFAULT);
1548 ++argp;
1549
1550 ++u_index;
1551 }
1552
1553 if (put_user(u_index, arg))
1554 return (-EFAULT);
1555 return (0);
1556 }
1557
1558 /*
1559 ** Send ATAPI_FORMAT_UNIT to the drive.
1560 **
1561 ** Userland gives us the following structure:
1562 **
1563 ** struct idefloppy_format_command {
1564 ** int nblocks;
1565 ** int blocksize;
1566 ** int flags;
1567 ** } ;
1568 **
1569 ** flags is a bitmask, currently, the only defined flag is:
1570 **
1571 ** 0x01 - verify media after format.
1572 */
1573
1574 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1575 {
1576 int blocks;
1577 int length;
1578 int flags;
1579 idefloppy_pc_t pc;
1580
1581 if (get_user(blocks, arg) ||
1582 get_user(length, arg+1) ||
1583 get_user(flags, arg+2)) {
1584 return (-EFAULT);
1585 }
1586
1587 /* Get the SFRP bit */
1588 (void) idefloppy_get_capability_page(drive);
1589 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1590 if (idefloppy_queue_pc_tail(drive, &pc)) {
1591 return (-EIO);
1592 }
1593
1594 return (0);
1595 }
1596
1597 /*
1598 ** Get ATAPI_FORMAT_UNIT progress indication.
1599 **
1600 ** Userland gives a pointer to an int. The int is set to a progress
1601 ** indicator 0-65536, with 65536=100%.
1602 **
1603 ** If the drive does not support format progress indication, we just check
1604 ** the dsc bit, and return either 0 or 65536.
1605 */
1606
1607 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1608 {
1609 idefloppy_floppy_t *floppy = drive->driver_data;
1610 idefloppy_pc_t pc;
1611 int progress_indication = 0x10000;
1612
1613 if (floppy->srfp) {
1614 idefloppy_create_request_sense_cmd(&pc);
1615 if (idefloppy_queue_pc_tail(drive, &pc)) {
1616 return (-EIO);
1617 }
1618
1619 if (floppy->sense_key == 2 &&
1620 floppy->asc == 4 &&
1621 floppy->ascq == 4) {
1622 progress_indication = floppy->progress_indication;
1623 }
1624 /* Else assume format_unit has finished, and we're
1625 ** at 0x10000 */
1626 } else {
1627 unsigned long flags;
1628 u8 stat;
1629
1630 local_irq_save(flags);
1631 stat = drive->hwif->INB(IDE_STATUS_REG);
1632 local_irq_restore(flags);
1633
1634 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1635 }
1636 if (put_user(progress_indication, arg))
1637 return (-EFAULT);
1638
1639 return (0);
1640 }
1641
1642 /*
1643 * Return the current floppy capacity.
1644 */
1645 static sector_t idefloppy_capacity (ide_drive_t *drive)
1646 {
1647 idefloppy_floppy_t *floppy = drive->driver_data;
1648 unsigned long capacity = floppy->blocks * floppy->bs_factor;
1649
1650 return capacity;
1651 }
1652
1653 /*
1654 * idefloppy_identify_device checks if we can support a drive,
1655 * based on the ATAPI IDENTIFY command results.
1656 */
1657 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1658 {
1659 struct idefloppy_id_gcw gcw;
1660 #if IDEFLOPPY_DEBUG_INFO
1661 u16 mask,i;
1662 char buffer[80];
1663 #endif /* IDEFLOPPY_DEBUG_INFO */
1664
1665 *((u16 *) &gcw) = id->config;
1666
1667 #ifdef CONFIG_PPC
1668 /* kludge for Apple PowerBook internal zip */
1669 if ((gcw.device_type == 5) &&
1670 !strstr(id->model, "CD-ROM") &&
1671 strstr(id->model, "ZIP"))
1672 gcw.device_type = 0;
1673 #endif
1674
1675 #if IDEFLOPPY_DEBUG_INFO
1676 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1677 switch (gcw.protocol) {
1678 case 0: case 1: sprintf(buffer, "ATA");break;
1679 case 2: sprintf(buffer, "ATAPI");break;
1680 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1681 }
1682 printk(KERN_INFO "Protocol Type: %s\n", buffer);
1683 switch (gcw.device_type) {
1684 case 0: sprintf(buffer, "Direct-access Device");break;
1685 case 1: sprintf(buffer, "Streaming Tape Device");break;
1686 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1687 case 5: sprintf(buffer, "CD-ROM Device");break;
1688 case 6: sprintf(buffer, "Reserved");
1689 case 7: sprintf(buffer, "Optical memory Device");break;
1690 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1691 default: sprintf(buffer, "Reserved");
1692 }
1693 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1694 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1695 switch (gcw.drq_type) {
1696 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1697 case 1: sprintf(buffer, "Interrupt DRQ");break;
1698 case 2: sprintf(buffer, "Accelerated DRQ");break;
1699 case 3: sprintf(buffer, "Reserved");break;
1700 }
1701 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1702 switch (gcw.packet_size) {
1703 case 0: sprintf(buffer, "12 bytes");break;
1704 case 1: sprintf(buffer, "16 bytes");break;
1705 default: sprintf(buffer, "Reserved");break;
1706 }
1707 printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1708 printk(KERN_INFO "Model: %.40s\n",id->model);
1709 printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1710 printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1711 printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1712 printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1713 printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1714 printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1715 printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1716 printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1717 printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1718 printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1719 printk(KERN_INFO "Single Word DMA supported modes:\n");
1720 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1721 if (id->dma_1word & mask)
1722 printk(KERN_INFO " Mode %d%s\n", i,
1723 (id->dma_1word & (mask << 8)) ? " (active)" : "");
1724 }
1725 printk(KERN_INFO "Multi Word DMA supported modes:\n");
1726 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1727 if (id->dma_mword & mask)
1728 printk(KERN_INFO " Mode %d%s\n", i,
1729 (id->dma_mword & (mask << 8)) ? " (active)" : "");
1730 }
1731 if (id->field_valid & 0x0002) {
1732 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1733 id->eide_pio_modes & 1 ? "Mode 3":"None");
1734 if (id->eide_dma_min == 0)
1735 sprintf(buffer, "Not supported");
1736 else
1737 sprintf(buffer, "%d ns",id->eide_dma_min);
1738 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1739 if (id->eide_dma_time == 0)
1740 sprintf(buffer, "Not supported");
1741 else
1742 sprintf(buffer, "%d ns",id->eide_dma_time);
1743 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1744 if (id->eide_pio == 0)
1745 sprintf(buffer, "Not supported");
1746 else
1747 sprintf(buffer, "%d ns",id->eide_pio);
1748 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1749 buffer);
1750 if (id->eide_pio_iordy == 0)
1751 sprintf(buffer, "Not supported");
1752 else
1753 sprintf(buffer, "%d ns",id->eide_pio_iordy);
1754 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1755 } else
1756 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1757 #endif /* IDEFLOPPY_DEBUG_INFO */
1758
1759 if (gcw.protocol != 2)
1760 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1761 else if (gcw.device_type != 0)
1762 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1763 else if (!gcw.removable)
1764 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1765 else if (gcw.drq_type == 3) {
1766 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1767 } else if (gcw.packet_size != 0) {
1768 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1769 } else
1770 return 1;
1771 return 0;
1772 }
1773
1774 #ifdef CONFIG_IDE_PROC_FS
1775 static void idefloppy_add_settings(ide_drive_t *drive)
1776 {
1777 idefloppy_floppy_t *floppy = drive->driver_data;
1778
1779 /*
1780 * drive setting name read/write data type min max mul_factor div_factor data pointer set function
1781 */
1782 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
1783 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
1784 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
1785 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL);
1786 }
1787 #else
1788 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1789 #endif
1790
1791 /*
1792 * Driver initialization.
1793 */
1794 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1795 {
1796 struct idefloppy_id_gcw gcw;
1797
1798 *((u16 *) &gcw) = drive->id->config;
1799 floppy->pc = floppy->pc_stack;
1800 if (gcw.drq_type == 1)
1801 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1802 /*
1803 * We used to check revisions here. At this point however
1804 * I'm giving up. Just assume they are all broken, its easier.
1805 *
1806 * The actual reason for the workarounds was likely
1807 * a driver bug after all rather than a firmware bug,
1808 * and the workaround below used to hide it. It should
1809 * be fixed as of version 1.9, but to be on the safe side
1810 * we'll leave the limitation below for the 2.2.x tree.
1811 */
1812
1813 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1814 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1815 /* This value will be visible in the /proc/ide/hdx/settings */
1816 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1817 blk_queue_max_sectors(drive->queue, 64);
1818 }
1819
1820 /*
1821 * Guess what? The IOMEGA Clik! drive also needs the
1822 * above fix. It makes nasty clicking noises without
1823 * it, so please don't remove this.
1824 */
1825 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1826 blk_queue_max_sectors(drive->queue, 64);
1827 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1828 }
1829
1830
1831 (void) idefloppy_get_capacity(drive);
1832 idefloppy_add_settings(drive);
1833 }
1834
1835 static void ide_floppy_remove(ide_drive_t *drive)
1836 {
1837 idefloppy_floppy_t *floppy = drive->driver_data;
1838 struct gendisk *g = floppy->disk;
1839
1840 ide_proc_unregister_driver(drive, floppy->driver);
1841
1842 del_gendisk(g);
1843
1844 ide_floppy_put(floppy);
1845 }
1846
1847 static void ide_floppy_release(struct kref *kref)
1848 {
1849 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1850 ide_drive_t *drive = floppy->drive;
1851 struct gendisk *g = floppy->disk;
1852
1853 drive->driver_data = NULL;
1854 g->private_data = NULL;
1855 put_disk(g);
1856 kfree(floppy);
1857 }
1858
1859 #ifdef CONFIG_IDE_PROC_FS
1860 static int proc_idefloppy_read_capacity
1861 (char *page, char **start, off_t off, int count, int *eof, void *data)
1862 {
1863 ide_drive_t*drive = (ide_drive_t *)data;
1864 int len;
1865
1866 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1867 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1868 }
1869
1870 static ide_proc_entry_t idefloppy_proc[] = {
1871 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
1872 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
1873 { NULL, 0, NULL, NULL }
1874 };
1875 #endif /* CONFIG_IDE_PROC_FS */
1876
1877 static int ide_floppy_probe(ide_drive_t *);
1878
1879 static ide_driver_t idefloppy_driver = {
1880 .gen_driver = {
1881 .owner = THIS_MODULE,
1882 .name = "ide-floppy",
1883 .bus = &ide_bus_type,
1884 },
1885 .probe = ide_floppy_probe,
1886 .remove = ide_floppy_remove,
1887 .version = IDEFLOPPY_VERSION,
1888 .media = ide_floppy,
1889 .supports_dsc_overlap = 0,
1890 .do_request = idefloppy_do_request,
1891 .end_request = idefloppy_do_end_request,
1892 .error = __ide_error,
1893 .abort = __ide_abort,
1894 #ifdef CONFIG_IDE_PROC_FS
1895 .proc = idefloppy_proc,
1896 #endif
1897 };
1898
1899 static int idefloppy_open(struct inode *inode, struct file *filp)
1900 {
1901 struct gendisk *disk = inode->i_bdev->bd_disk;
1902 struct ide_floppy_obj *floppy;
1903 ide_drive_t *drive;
1904 idefloppy_pc_t pc;
1905 int ret = 0;
1906
1907 debug_log(KERN_INFO "Reached idefloppy_open\n");
1908
1909 if (!(floppy = ide_floppy_get(disk)))
1910 return -ENXIO;
1911
1912 drive = floppy->drive;
1913
1914 floppy->openers++;
1915
1916 if (floppy->openers == 1) {
1917 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1918 /* Just in case */
1919
1920 idefloppy_create_test_unit_ready_cmd(&pc);
1921 if (idefloppy_queue_pc_tail(drive, &pc)) {
1922 idefloppy_create_start_stop_cmd(&pc, 1);
1923 (void) idefloppy_queue_pc_tail(drive, &pc);
1924 }
1925
1926 if (idefloppy_get_capacity (drive)
1927 && (filp->f_flags & O_NDELAY) == 0
1928 /*
1929 ** Allow O_NDELAY to open a drive without a disk, or with
1930 ** an unreadable disk, so that we can get the format
1931 ** capacity of the drive or begin the format - Sam
1932 */
1933 ) {
1934 ret = -EIO;
1935 goto out_put_floppy;
1936 }
1937
1938 if (floppy->wp && (filp->f_mode & 2)) {
1939 ret = -EROFS;
1940 goto out_put_floppy;
1941 }
1942 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1943 /* IOMEGA Clik! drives do not support lock/unlock commands */
1944 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1945 idefloppy_create_prevent_cmd(&pc, 1);
1946 (void) idefloppy_queue_pc_tail(drive, &pc);
1947 }
1948 check_disk_change(inode->i_bdev);
1949 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1950 ret = -EBUSY;
1951 goto out_put_floppy;
1952 }
1953 return 0;
1954
1955 out_put_floppy:
1956 floppy->openers--;
1957 ide_floppy_put(floppy);
1958 return ret;
1959 }
1960
1961 static int idefloppy_release(struct inode *inode, struct file *filp)
1962 {
1963 struct gendisk *disk = inode->i_bdev->bd_disk;
1964 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1965 ide_drive_t *drive = floppy->drive;
1966 idefloppy_pc_t pc;
1967
1968 debug_log(KERN_INFO "Reached idefloppy_release\n");
1969
1970 if (floppy->openers == 1) {
1971 /* IOMEGA Clik! drives do not support lock/unlock commands */
1972 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1973 idefloppy_create_prevent_cmd(&pc, 0);
1974 (void) idefloppy_queue_pc_tail(drive, &pc);
1975 }
1976
1977 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1978 }
1979
1980 floppy->openers--;
1981
1982 ide_floppy_put(floppy);
1983
1984 return 0;
1985 }
1986
1987 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1988 {
1989 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1990 ide_drive_t *drive = floppy->drive;
1991
1992 geo->heads = drive->bios_head;
1993 geo->sectors = drive->bios_sect;
1994 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1995 return 0;
1996 }
1997
1998 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1999 unsigned int cmd, unsigned long arg)
2000 {
2001 struct block_device *bdev = inode->i_bdev;
2002 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2003 ide_drive_t *drive = floppy->drive;
2004 void __user *argp = (void __user *)arg;
2005 int err;
2006 int prevent = (arg) ? 1 : 0;
2007 idefloppy_pc_t pc;
2008
2009 switch (cmd) {
2010 case CDROMEJECT:
2011 prevent = 0;
2012 /* fall through */
2013 case CDROM_LOCKDOOR:
2014 if (floppy->openers > 1)
2015 return -EBUSY;
2016
2017 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2018 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2019 idefloppy_create_prevent_cmd(&pc, prevent);
2020 (void) idefloppy_queue_pc_tail(drive, &pc);
2021 }
2022 if (cmd == CDROMEJECT) {
2023 idefloppy_create_start_stop_cmd(&pc, 2);
2024 (void) idefloppy_queue_pc_tail(drive, &pc);
2025 }
2026 return 0;
2027 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2028 return 0;
2029 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2030 return idefloppy_get_format_capacities(drive, argp);
2031 case IDEFLOPPY_IOCTL_FORMAT_START:
2032
2033 if (!(file->f_mode & 2))
2034 return -EPERM;
2035
2036 if (floppy->openers > 1) {
2037 /* Don't format if someone is using the disk */
2038
2039 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2040 &floppy->flags);
2041 return -EBUSY;
2042 }
2043
2044 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2045
2046 err = idefloppy_begin_format(drive, argp);
2047 if (err)
2048 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2049 return err;
2050 /*
2051 ** Note, the bit will be cleared when the device is
2052 ** closed. This is the cleanest way to handle the
2053 ** situation where the drive does not support
2054 ** format progress reporting.
2055 */
2056 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2057 return idefloppy_get_format_progress(drive, argp);
2058 }
2059
2060 /*
2061 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
2062 * and CDROM_SEND_PACKET (legacy) ioctls
2063 */
2064 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
2065 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
2066 bdev->bd_disk, cmd, argp);
2067 else
2068 err = -ENOTTY;
2069
2070 if (err == -ENOTTY)
2071 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
2072
2073 return err;
2074 }
2075
2076 static int idefloppy_media_changed(struct gendisk *disk)
2077 {
2078 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2079 ide_drive_t *drive = floppy->drive;
2080
2081 /* do not scan partitions twice if this is a removable device */
2082 if (drive->attach) {
2083 drive->attach = 0;
2084 return 0;
2085 }
2086 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2087 }
2088
2089 static int idefloppy_revalidate_disk(struct gendisk *disk)
2090 {
2091 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2092 set_capacity(disk, idefloppy_capacity(floppy->drive));
2093 return 0;
2094 }
2095
2096 static struct block_device_operations idefloppy_ops = {
2097 .owner = THIS_MODULE,
2098 .open = idefloppy_open,
2099 .release = idefloppy_release,
2100 .ioctl = idefloppy_ioctl,
2101 .getgeo = idefloppy_getgeo,
2102 .media_changed = idefloppy_media_changed,
2103 .revalidate_disk= idefloppy_revalidate_disk
2104 };
2105
2106 static int ide_floppy_probe(ide_drive_t *drive)
2107 {
2108 idefloppy_floppy_t *floppy;
2109 struct gendisk *g;
2110
2111 if (!strstr("ide-floppy", drive->driver_req))
2112 goto failed;
2113 if (!drive->present)
2114 goto failed;
2115 if (drive->media != ide_floppy)
2116 goto failed;
2117 if (!idefloppy_identify_device (drive, drive->id)) {
2118 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2119 goto failed;
2120 }
2121 if (drive->scsi) {
2122 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2123 goto failed;
2124 }
2125 if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2126 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2127 goto failed;
2128 }
2129
2130 g = alloc_disk(1 << PARTN_BITS);
2131 if (!g)
2132 goto out_free_floppy;
2133
2134 ide_init_disk(g, drive);
2135
2136 ide_proc_register_driver(drive, &idefloppy_driver);
2137
2138 kref_init(&floppy->kref);
2139
2140 floppy->drive = drive;
2141 floppy->driver = &idefloppy_driver;
2142 floppy->disk = g;
2143
2144 g->private_data = &floppy->driver;
2145
2146 drive->driver_data = floppy;
2147
2148 idefloppy_setup (drive, floppy);
2149
2150 g->minors = 1 << PARTN_BITS;
2151 g->driverfs_dev = &drive->gendev;
2152 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2153 g->fops = &idefloppy_ops;
2154 drive->attach = 1;
2155 add_disk(g);
2156 return 0;
2157
2158 out_free_floppy:
2159 kfree(floppy);
2160 failed:
2161 return -ENODEV;
2162 }
2163
2164 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2165
2166 static void __exit idefloppy_exit (void)
2167 {
2168 driver_unregister(&idefloppy_driver.gen_driver);
2169 }
2170
2171 static int __init idefloppy_init(void)
2172 {
2173 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2174 return driver_register(&idefloppy_driver.gen_driver);
2175 }
2176
2177 MODULE_ALIAS("ide:*m-floppy*");
2178 module_init(idefloppy_init);
2179 module_exit(idefloppy_exit);
2180 MODULE_LICENSE("GPL");
WRT350N Kernel Patches