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Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / ide / ide-floppy.c
blobd33717c8afd466731855e4a42f01d65c9ee85b2e
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 <asm/byteorder.h>
103 #include <asm/irq.h>
104 #include <asm/uaccess.h>
105 #include <asm/io.h>
106 #include <asm/unaligned.h>
107
108 /*
109 * The following are used to debug the driver.
110 */
111 #define IDEFLOPPY_DEBUG_LOG 0
112 #define IDEFLOPPY_DEBUG_INFO 0
113 #define IDEFLOPPY_DEBUG_BUGS 1
114
115 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
116 #define IDEFLOPPY_DEBUG( fmt, args... )
117
118 #if IDEFLOPPY_DEBUG_LOG
119 #define debug_log printk
120 #else
121 #define debug_log(fmt, args... ) do {} while(0)
122 #endif
123
124
125 /*
126 * Some drives require a longer irq timeout.
127 */
128 #define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
129
130 /*
131 * After each failed packet command we issue a request sense command
132 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
133 */
134 #define IDEFLOPPY_MAX_PC_RETRIES 3
135
136 /*
137 * With each packet command, we allocate a buffer of
138 * IDEFLOPPY_PC_BUFFER_SIZE bytes.
139 */
140 #define IDEFLOPPY_PC_BUFFER_SIZE 256
141
142 /*
143 * In various places in the driver, we need to allocate storage
144 * for packet commands and requests, which will remain valid while
145 * we leave the driver to wait for an interrupt or a timeout event.
146 */
147 #define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
148
149 /*
150 * Our view of a packet command.
151 */
152 typedef struct idefloppy_packet_command_s {
153 u8 c[12]; /* Actual packet bytes */
154 int retries; /* On each retry, we increment retries */
155 int error; /* Error code */
156 int request_transfer; /* Bytes to transfer */
157 int actually_transferred; /* Bytes actually transferred */
158 int buffer_size; /* Size of our data buffer */
159 int b_count; /* Missing/Available data on the current buffer */
160 struct request *rq; /* The corresponding request */
161 u8 *buffer; /* Data buffer */
162 u8 *current_position; /* Pointer into the above buffer */
163 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */
164 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
165 unsigned long flags; /* Status/Action bit flags: long for set_bit */
166 } idefloppy_pc_t;
167
168 /*
169 * Packet command flag bits.
170 */
171 #define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */
172 #define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */
173 #define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */
174 #define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */
175 #define PC_WRITING 5 /* Data direction */
176
177 #define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */
178
179 /*
180 * Removable Block Access Capabilities Page
181 */
182 typedef struct {
183 #if defined(__LITTLE_ENDIAN_BITFIELD)
184 unsigned page_code :6; /* Page code - Should be 0x1b */
185 unsigned reserved1_6 :1; /* Reserved */
186 unsigned ps :1; /* Should be 0 */
187 #elif defined(__BIG_ENDIAN_BITFIELD)
188 unsigned ps :1; /* Should be 0 */
189 unsigned reserved1_6 :1; /* Reserved */
190 unsigned page_code :6; /* Page code - Should be 0x1b */
191 #else
192 #error "Bitfield endianness not defined! Check your byteorder.h"
193 #endif
194 u8 page_length; /* Page Length - Should be 0xa */
195 #if defined(__LITTLE_ENDIAN_BITFIELD)
196 unsigned reserved2 :6;
197 unsigned srfp :1; /* Supports reporting progress of format */
198 unsigned sflp :1; /* System floppy type device */
199 unsigned tlun :3; /* Total logical units supported by the device */
200 unsigned reserved3 :3;
201 unsigned sml :1; /* Single / Multiple lun supported */
202 unsigned ncd :1; /* Non cd optical device */
203 #elif defined(__BIG_ENDIAN_BITFIELD)
204 unsigned sflp :1; /* System floppy type device */
205 unsigned srfp :1; /* Supports reporting progress of format */
206 unsigned reserved2 :6;
207 unsigned ncd :1; /* Non cd optical device */
208 unsigned sml :1; /* Single / Multiple lun supported */
209 unsigned reserved3 :3;
210 unsigned tlun :3; /* Total logical units supported by the device */
211 #else
212 #error "Bitfield endianness not defined! Check your byteorder.h"
213 #endif
214 u8 reserved[8];
215 } idefloppy_capabilities_page_t;
216
217 /*
218 * Flexible disk page.
219 */
220 typedef struct {
221 #if defined(__LITTLE_ENDIAN_BITFIELD)
222 unsigned page_code :6; /* Page code - Should be 0x5 */
223 unsigned reserved1_6 :1; /* Reserved */
224 unsigned ps :1; /* The device is capable of saving the page */
225 #elif defined(__BIG_ENDIAN_BITFIELD)
226 unsigned ps :1; /* The device is capable of saving the page */
227 unsigned reserved1_6 :1; /* Reserved */
228 unsigned page_code :6; /* Page code - Should be 0x5 */
229 #else
230 #error "Bitfield endianness not defined! Check your byteorder.h"
231 #endif
232 u8 page_length; /* Page Length - Should be 0x1e */
233 u16 transfer_rate; /* In kilobits per second */
234 u8 heads, sectors; /* Number of heads, Number of sectors per track */
235 u16 sector_size; /* Byes per sector */
236 u16 cyls; /* Number of cylinders */
237 u8 reserved10[10];
238 u8 motor_delay; /* Motor off delay */
239 u8 reserved21[7];
240 u16 rpm; /* Rotations per minute */
241 u8 reserved30[2];
242 } idefloppy_flexible_disk_page_t;
243
244 /*
245 * Format capacity
246 */
247 typedef struct {
248 u8 reserved[3];
249 u8 length; /* Length of the following descriptors in bytes */
250 } idefloppy_capacity_header_t;
251
252 typedef struct {
253 u32 blocks; /* Number of blocks */
254 #if defined(__LITTLE_ENDIAN_BITFIELD)
255 unsigned dc :2; /* Descriptor Code */
256 unsigned reserved :6;
257 #elif defined(__BIG_ENDIAN_BITFIELD)
258 unsigned reserved :6;
259 unsigned dc :2; /* Descriptor Code */
260 #else
261 #error "Bitfield endianness not defined! Check your byteorder.h"
262 #endif
263 u8 length_msb; /* Block Length (MSB)*/
264 u16 length; /* Block Length */
265 } idefloppy_capacity_descriptor_t;
266
267 #define CAPACITY_INVALID 0x00
268 #define CAPACITY_UNFORMATTED 0x01
269 #define CAPACITY_CURRENT 0x02
270 #define CAPACITY_NO_CARTRIDGE 0x03
271
272 /*
273 * Most of our global data which we need to save even as we leave the
274 * driver due to an interrupt or a timer event is stored in a variable
275 * of type idefloppy_floppy_t, defined below.
276 */
277 typedef struct ide_floppy_obj {
278 ide_drive_t *drive;
279 ide_driver_t *driver;
280 struct gendisk *disk;
281 struct kref kref;
282
283 /* Current packet command */
284 idefloppy_pc_t *pc;
285 /* Last failed packet command */
286 idefloppy_pc_t *failed_pc;
287 /* Packet command stack */
288 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
289 /* Next free packet command storage space */
290 int pc_stack_index;
291 struct request rq_stack[IDEFLOPPY_PC_STACK];
292 /* We implement a circular array */
293 int rq_stack_index;
294
295 /*
296 * Last error information
297 */
298 u8 sense_key, asc, ascq;
299 /* delay this long before sending packet command */
300 u8 ticks;
301 int progress_indication;
302
303 /*
304 * Device information
305 */
306 /* Current format */
307 int blocks, block_size, bs_factor;
308 /* Last format capacity */
309 idefloppy_capacity_descriptor_t capacity;
310 /* Copy of the flexible disk page */
311 idefloppy_flexible_disk_page_t flexible_disk_page;
312 /* Write protect */
313 int wp;
314 /* Supports format progress report */
315 int srfp;
316 /* Status/Action flags */
317 unsigned long flags;
318 } idefloppy_floppy_t;
319
320 #define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
321
322 /*
323 * Floppy flag bits values.
324 */
325 #define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */
326 #define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */
327 #define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */
328 #define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */
329 #define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */
330 #define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */
331
332 /*
333 * ATAPI floppy drive packet commands
334 */
335 #define IDEFLOPPY_FORMAT_UNIT_CMD 0x04
336 #define IDEFLOPPY_INQUIRY_CMD 0x12
337 #define IDEFLOPPY_MODE_SELECT_CMD 0x55
338 #define IDEFLOPPY_MODE_SENSE_CMD 0x5a
339 #define IDEFLOPPY_READ10_CMD 0x28
340 #define IDEFLOPPY_READ12_CMD 0xa8
341 #define IDEFLOPPY_READ_CAPACITY_CMD 0x23
342 #define IDEFLOPPY_REQUEST_SENSE_CMD 0x03
343 #define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e
344 #define IDEFLOPPY_SEEK_CMD 0x2b
345 #define IDEFLOPPY_START_STOP_CMD 0x1b
346 #define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00
347 #define IDEFLOPPY_VERIFY_CMD 0x2f
348 #define IDEFLOPPY_WRITE10_CMD 0x2a
349 #define IDEFLOPPY_WRITE12_CMD 0xaa
350 #define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e
351
352 /*
353 * Defines for the mode sense command
354 */
355 #define MODE_SENSE_CURRENT 0x00
356 #define MODE_SENSE_CHANGEABLE 0x01
357 #define MODE_SENSE_DEFAULT 0x02
358 #define MODE_SENSE_SAVED 0x03
359
360 /*
361 * IOCTLs used in low-level formatting.
362 */
363
364 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600
365 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601
366 #define IDEFLOPPY_IOCTL_FORMAT_START 0x4602
367 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603
368
369 #if 0
370 /*
371 * Special requests for our block device strategy routine.
372 */
373 #define IDEFLOPPY_FIRST_RQ 90
374
375 /*
376 * IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue.
377 */
378 #define IDEFLOPPY_PC_RQ 90
379
380 #define IDEFLOPPY_LAST_RQ 90
381
382 /*
383 * A macro which can be used to check if a given request command
384 * originated in the driver or in the buffer cache layer.
385 */
386 #define IDEFLOPPY_RQ_CMD(cmd) ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ))
387
388 #endif
389
390 /*
391 * Error codes which are returned in rq->errors to the higher part
392 * of the driver.
393 */
394 #define IDEFLOPPY_ERROR_GENERAL 101
395
396 /*
397 * The following is used to format the general configuration word of
398 * the ATAPI IDENTIFY DEVICE command.
399 */
400 struct idefloppy_id_gcw {
401 #if defined(__LITTLE_ENDIAN_BITFIELD)
402 unsigned packet_size :2; /* Packet Size */
403 unsigned reserved234 :3; /* Reserved */
404 unsigned drq_type :2; /* Command packet DRQ type */
405 unsigned removable :1; /* Removable media */
406 unsigned device_type :5; /* Device type */
407 unsigned reserved13 :1; /* Reserved */
408 unsigned protocol :2; /* Protocol type */
409 #elif defined(__BIG_ENDIAN_BITFIELD)
410 unsigned protocol :2; /* Protocol type */
411 unsigned reserved13 :1; /* Reserved */
412 unsigned device_type :5; /* Device type */
413 unsigned removable :1; /* Removable media */
414 unsigned drq_type :2; /* Command packet DRQ type */
415 unsigned reserved234 :3; /* Reserved */
416 unsigned packet_size :2; /* Packet Size */
417 #else
418 #error "Bitfield endianness not defined! Check your byteorder.h"
419 #endif
420 };
421
422 /*
423 * INQUIRY packet command - Data Format
424 */
425 typedef struct {
426 #if defined(__LITTLE_ENDIAN_BITFIELD)
427 unsigned device_type :5; /* Peripheral Device Type */
428 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
429 unsigned reserved1_6t0 :7; /* Reserved */
430 unsigned rmb :1; /* Removable Medium Bit */
431 unsigned ansi_version :3; /* ANSI Version */
432 unsigned ecma_version :3; /* ECMA Version */
433 unsigned iso_version :2; /* ISO Version */
434 unsigned response_format :4; /* Response Data Format */
435 unsigned reserved3_45 :2; /* Reserved */
436 unsigned reserved3_6 :1; /* TrmIOP - Reserved */
437 unsigned reserved3_7 :1; /* AENC - Reserved */
438 #elif defined(__BIG_ENDIAN_BITFIELD)
439 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
440 unsigned device_type :5; /* Peripheral Device Type */
441 unsigned rmb :1; /* Removable Medium Bit */
442 unsigned reserved1_6t0 :7; /* Reserved */
443 unsigned iso_version :2; /* ISO Version */
444 unsigned ecma_version :3; /* ECMA Version */
445 unsigned ansi_version :3; /* ANSI Version */
446 unsigned reserved3_7 :1; /* AENC - Reserved */
447 unsigned reserved3_6 :1; /* TrmIOP - Reserved */
448 unsigned reserved3_45 :2; /* Reserved */
449 unsigned response_format :4; /* Response Data Format */
450 #else
451 #error "Bitfield endianness not defined! Check your byteorder.h"
452 #endif
453 u8 additional_length; /* Additional Length (total_length-4) */
454 u8 rsv5, rsv6, rsv7; /* Reserved */
455 u8 vendor_id[8]; /* Vendor Identification */
456 u8 product_id[16]; /* Product Identification */
457 u8 revision_level[4]; /* Revision Level */
458 u8 vendor_specific[20]; /* Vendor Specific - Optional */
459 u8 reserved56t95[40]; /* Reserved - Optional */
460 /* Additional information may be returned */
461 } idefloppy_inquiry_result_t;
462
463 /*
464 * REQUEST SENSE packet command result - Data Format.
465 */
466 typedef struct {
467 #if defined(__LITTLE_ENDIAN_BITFIELD)
468 unsigned error_code :7; /* Current error (0x70) */
469 unsigned valid :1; /* The information field conforms to SFF-8070i */
470 u8 reserved1 :8; /* Reserved */
471 unsigned sense_key :4; /* Sense Key */
472 unsigned reserved2_4 :1; /* Reserved */
473 unsigned ili :1; /* Incorrect Length Indicator */
474 unsigned reserved2_67 :2;
475 #elif defined(__BIG_ENDIAN_BITFIELD)
476 unsigned valid :1; /* The information field conforms to SFF-8070i */
477 unsigned error_code :7; /* Current error (0x70) */
478 u8 reserved1 :8; /* Reserved */
479 unsigned reserved2_67 :2;
480 unsigned ili :1; /* Incorrect Length Indicator */
481 unsigned reserved2_4 :1; /* Reserved */
482 unsigned sense_key :4; /* Sense Key */
483 #else
484 #error "Bitfield endianness not defined! Check your byteorder.h"
485 #endif
486 u32 information __attribute__ ((packed));
487 u8 asl; /* Additional sense length (n-7) */
488 u32 command_specific; /* Additional command specific information */
489 u8 asc; /* Additional Sense Code */
490 u8 ascq; /* Additional Sense Code Qualifier */
491 u8 replaceable_unit_code; /* Field Replaceable Unit Code */
492 u8 sksv[3];
493 u8 pad[2]; /* Padding to 20 bytes */
494 } idefloppy_request_sense_result_t;
495
496 /*
497 * Pages of the SELECT SENSE / MODE SENSE packet commands.
498 */
499 #define IDEFLOPPY_CAPABILITIES_PAGE 0x1b
500 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05
501
502 /*
503 * Mode Parameter Header for the MODE SENSE packet command
504 */
505 typedef struct {
506 u16 mode_data_length; /* Length of the following data transfer */
507 u8 medium_type; /* Medium Type */
508 #if defined(__LITTLE_ENDIAN_BITFIELD)
509 unsigned reserved3 :7;
510 unsigned wp :1; /* Write protect */
511 #elif defined(__BIG_ENDIAN_BITFIELD)
512 unsigned wp :1; /* Write protect */
513 unsigned reserved3 :7;
514 #else
515 #error "Bitfield endianness not defined! Check your byteorder.h"
516 #endif
517 u8 reserved[4];
518 } idefloppy_mode_parameter_header_t;
519
520 static DEFINE_MUTEX(idefloppy_ref_mutex);
521
522 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
523
524 #define ide_floppy_g(disk) \
525 container_of((disk)->private_data, struct ide_floppy_obj, driver)
526
527 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
528 {
529 struct ide_floppy_obj *floppy = NULL;
530
531 mutex_lock(&idefloppy_ref_mutex);
532 floppy = ide_floppy_g(disk);
533 if (floppy)
534 kref_get(&floppy->kref);
535 mutex_unlock(&idefloppy_ref_mutex);
536 return floppy;
537 }
538
539 static void ide_floppy_release(struct kref *);
540
541 static void ide_floppy_put(struct ide_floppy_obj *floppy)
542 {
543 mutex_lock(&idefloppy_ref_mutex);
544 kref_put(&floppy->kref, ide_floppy_release);
545 mutex_unlock(&idefloppy_ref_mutex);
546 }
547
548 /*
549 * Too bad. The drive wants to send us data which we are not ready to accept.
550 * Just throw it away.
551 */
552 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
553 {
554 while (bcount--)
555 (void) HWIF(drive)->INB(IDE_DATA_REG);
556 }
557
558 #if IDEFLOPPY_DEBUG_BUGS
559 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
560 {
561 while (bcount--)
562 HWIF(drive)->OUTB(0, IDE_DATA_REG);
563 }
564 #endif /* IDEFLOPPY_DEBUG_BUGS */
565
566
567 /*
568 * idefloppy_do_end_request is used to finish servicing a request.
569 *
570 * For read/write requests, we will call ide_end_request to pass to the
571 * next buffer.
572 */
573 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
574 {
575 idefloppy_floppy_t *floppy = drive->driver_data;
576 struct request *rq = HWGROUP(drive)->rq;
577 int error;
578
579 debug_log(KERN_INFO "Reached idefloppy_end_request\n");
580
581 switch (uptodate) {
582 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
583 case 1: error = 0; break;
584 default: error = uptodate;
585 }
586 if (error)
587 floppy->failed_pc = NULL;
588 /* Why does this happen? */
589 if (!rq)
590 return 0;
591 if (!blk_special_request(rq)) {
592 /* our real local end request function */
593 ide_end_request(drive, uptodate, nsecs);
594 return 0;
595 }
596 rq->errors = error;
597 /* fixme: need to move this local also */
598 ide_end_drive_cmd(drive, 0, 0);
599 return 0;
600 }
601
602 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
603 {
604 struct request *rq = pc->rq;
605 struct bio_vec *bvec;
606 struct bio *bio;
607 unsigned long flags;
608 char *data;
609 int count, i, done = 0;
610
611 rq_for_each_bio(bio, rq) {
612 bio_for_each_segment(bvec, bio, i) {
613 if (!bcount)
614 break;
615
616 count = min(bvec->bv_len, bcount);
617
618 data = bvec_kmap_irq(bvec, &flags);
619 drive->hwif->atapi_input_bytes(drive, data, count);
620 bvec_kunmap_irq(data, &flags);
621
622 bcount -= count;
623 pc->b_count += count;
624 done += count;
625 }
626 }
627
628 idefloppy_do_end_request(drive, 1, done >> 9);
629
630 if (bcount) {
631 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
632 idefloppy_discard_data(drive, bcount);
633 }
634 }
635
636 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
637 {
638 struct request *rq = pc->rq;
639 struct bio *bio;
640 struct bio_vec *bvec;
641 unsigned long flags;
642 int count, i, done = 0;
643 char *data;
644
645 rq_for_each_bio(bio, rq) {
646 bio_for_each_segment(bvec, bio, i) {
647 if (!bcount)
648 break;
649
650 count = min(bvec->bv_len, bcount);
651
652 data = bvec_kmap_irq(bvec, &flags);
653 drive->hwif->atapi_output_bytes(drive, data, count);
654 bvec_kunmap_irq(data, &flags);
655
656 bcount -= count;
657 pc->b_count += count;
658 done += count;
659 }
660 }
661
662 idefloppy_do_end_request(drive, 1, done >> 9);
663
664 #if IDEFLOPPY_DEBUG_BUGS
665 if (bcount) {
666 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
667 idefloppy_write_zeros(drive, bcount);
668 }
669 #endif
670 }
671
672 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
673 {
674 struct request *rq = pc->rq;
675 struct bio *bio = rq->bio;
676
677 while ((bio = rq->bio) != NULL)
678 idefloppy_do_end_request(drive, 1, 0);
679 }
680
681 /*
682 * idefloppy_queue_pc_head generates a new packet command request in front
683 * of the request queue, before the current request, so that it will be
684 * processed immediately, on the next pass through the driver.
685 */
686 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
687 {
688 struct ide_floppy_obj *floppy = drive->driver_data;
689
690 ide_init_drive_cmd(rq);
691 rq->buffer = (char *) pc;
692 rq->cmd_type = REQ_TYPE_SPECIAL;
693 rq->rq_disk = floppy->disk;
694 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
695 }
696
697 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
698 {
699 idefloppy_floppy_t *floppy = drive->driver_data;
700
701 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
702 floppy->pc_stack_index=0;
703 return (&floppy->pc_stack[floppy->pc_stack_index++]);
704 }
705
706 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
707 {
708 idefloppy_floppy_t *floppy = drive->driver_data;
709
710 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
711 floppy->rq_stack_index = 0;
712 return (&floppy->rq_stack[floppy->rq_stack_index++]);
713 }
714
715 /*
716 * idefloppy_analyze_error is called on each failed packet command retry
717 * to analyze the request sense.
718 */
719 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
720 {
721 idefloppy_floppy_t *floppy = drive->driver_data;
722
723 floppy->sense_key = result->sense_key;
724 floppy->asc = result->asc;
725 floppy->ascq = result->ascq;
726 floppy->progress_indication = result->sksv[0] & 0x80 ?
727 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
728 if (floppy->failed_pc)
729 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
730 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
731 result->sense_key, result->asc, result->ascq);
732 else
733 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
734 "ascq = %x\n", result->sense_key,
735 result->asc, result->ascq);
736 }
737
738 static void idefloppy_request_sense_callback (ide_drive_t *drive)
739 {
740 idefloppy_floppy_t *floppy = drive->driver_data;
741
742 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
743
744 if (!floppy->pc->error) {
745 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
746 idefloppy_do_end_request(drive, 1, 0);
747 } else {
748 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
749 idefloppy_do_end_request(drive, 0, 0);
750 }
751 }
752
753 /*
754 * General packet command callback function.
755 */
756 static void idefloppy_pc_callback (ide_drive_t *drive)
757 {
758 idefloppy_floppy_t *floppy = drive->driver_data;
759
760 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
761
762 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
763 }
764
765 /*
766 * idefloppy_init_pc initializes a packet command.
767 */
768 static void idefloppy_init_pc (idefloppy_pc_t *pc)
769 {
770 memset(pc->c, 0, 12);
771 pc->retries = 0;
772 pc->flags = 0;
773 pc->request_transfer = 0;
774 pc->buffer = pc->pc_buffer;
775 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
776 pc->callback = &idefloppy_pc_callback;
777 }
778
779 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
780 {
781 idefloppy_init_pc(pc);
782 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
783 pc->c[4] = 255;
784 pc->request_transfer = 18;
785 pc->callback = &idefloppy_request_sense_callback;
786 }
787
788 /*
789 * idefloppy_retry_pc is called when an error was detected during the
790 * last packet command. We queue a request sense packet command in
791 * the head of the request list.
792 */
793 static void idefloppy_retry_pc (ide_drive_t *drive)
794 {
795 idefloppy_pc_t *pc;
796 struct request *rq;
797 atapi_error_t error;
798
799 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
800 pc = idefloppy_next_pc_storage(drive);
801 rq = idefloppy_next_rq_storage(drive);
802 idefloppy_create_request_sense_cmd(pc);
803 idefloppy_queue_pc_head(drive, pc, rq);
804 }
805
806 /*
807 * idefloppy_pc_intr is the usual interrupt handler which will be called
808 * during a packet command.
809 */
810 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
811 {
812 idefloppy_floppy_t *floppy = drive->driver_data;
813 atapi_status_t status;
814 atapi_bcount_t bcount;
815 atapi_ireason_t ireason;
816 idefloppy_pc_t *pc = floppy->pc;
817 struct request *rq = pc->rq;
818 unsigned int temp;
819
820 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
821 __FUNCTION__);
822
823 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
824 if (HWIF(drive)->ide_dma_end(drive)) {
825 set_bit(PC_DMA_ERROR, &pc->flags);
826 } else {
827 pc->actually_transferred = pc->request_transfer;
828 idefloppy_update_buffers(drive, pc);
829 }
830 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
831 }
832
833 /* Clear the interrupt */
834 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
835
836 if (!status.b.drq) { /* No more interrupts */
837 debug_log(KERN_INFO "Packet command completed, %d bytes "
838 "transferred\n", pc->actually_transferred);
839 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
840
841 local_irq_enable_in_hardirq();
842
843 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
844 /* Error detected */
845 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
846 drive->name);
847 rq->errors++;
848 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
849 printk(KERN_ERR "ide-floppy: I/O error in "
850 "request sense command\n");
851 return ide_do_reset(drive);
852 }
853 /* Retry operation */
854 idefloppy_retry_pc(drive);
855 /* queued, but not started */
856 return ide_stopped;
857 }
858 pc->error = 0;
859 if (floppy->failed_pc == pc)
860 floppy->failed_pc = NULL;
861 /* Command finished - Call the callback function */
862 pc->callback(drive);
863 return ide_stopped;
864 }
865
866 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
867 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
868 "more interrupts in DMA mode\n");
869 (void)__ide_dma_off(drive);
870 return ide_do_reset(drive);
871 }
872
873 /* Get the number of bytes to transfer */
874 bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
875 bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
876 /* on this interrupt */
877 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
878
879 if (ireason.b.cod) {
880 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
881 return ide_do_reset(drive);
882 }
883 if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
884 /* Hopefully, we will never get here */
885 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
886 ireason.b.io ? "Write":"Read");
887 printk(KERN_ERR "but the floppy wants us to %s !\n",
888 ireason.b.io ? "Read":"Write");
889 return ide_do_reset(drive);
890 }
891 if (!test_bit(PC_WRITING, &pc->flags)) {
892 /* Reading - Check that we have enough space */
893 temp = pc->actually_transferred + bcount.all;
894 if (temp > pc->request_transfer) {
895 if (temp > pc->buffer_size) {
896 printk(KERN_ERR "ide-floppy: The floppy wants "
897 "to send us more data than expected "
898 "- discarding data\n");
899 idefloppy_discard_data(drive,bcount.all);
900 BUG_ON(HWGROUP(drive)->handler != NULL);
901 ide_set_handler(drive,
902 &idefloppy_pc_intr,
903 IDEFLOPPY_WAIT_CMD,
904 NULL);
905 return ide_started;
906 }
907 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
908 "send us more data than expected - "
909 "allowing transfer\n");
910 }
911 }
912 if (test_bit(PC_WRITING, &pc->flags)) {
913 if (pc->buffer != NULL)
914 /* Write the current buffer */
915 HWIF(drive)->atapi_output_bytes(drive,
916 pc->current_position,
917 bcount.all);
918 else
919 idefloppy_output_buffers(drive, pc, bcount.all);
920 } else {
921 if (pc->buffer != NULL)
922 /* Read the current buffer */
923 HWIF(drive)->atapi_input_bytes(drive,
924 pc->current_position,
925 bcount.all);
926 else
927 idefloppy_input_buffers(drive, pc, bcount.all);
928 }
929 /* Update the current position */
930 pc->actually_transferred += bcount.all;
931 pc->current_position += bcount.all;
932
933 BUG_ON(HWGROUP(drive)->handler != NULL);
934 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */
935 return ide_started;
936 }
937
938 /*
939 * This is the original routine that did the packet transfer.
940 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
941 * for that drive below. The algorithm is chosen based on drive type
942 */
943 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
944 {
945 ide_startstop_t startstop;
946 idefloppy_floppy_t *floppy = drive->driver_data;
947 atapi_ireason_t ireason;
948
949 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
950 printk(KERN_ERR "ide-floppy: Strange, packet command "
951 "initiated yet DRQ isn't asserted\n");
952 return startstop;
953 }
954 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
955 if (!ireason.b.cod || ireason.b.io) {
956 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
957 "issuing a packet command\n");
958 return ide_do_reset(drive);
959 }
960 BUG_ON(HWGROUP(drive)->handler != NULL);
961 /* Set the interrupt routine */
962 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
963 /* Send the actual packet */
964 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
965 return ide_started;
966 }
967
968
969 /*
970 * What we have here is a classic case of a top half / bottom half
971 * interrupt service routine. In interrupt mode, the device sends
972 * an interrupt to signal it's ready to receive a packet. However,
973 * we need to delay about 2-3 ticks before issuing the packet or we
974 * gets in trouble.
975 *
976 * So, follow carefully. transfer_pc1 is called as an interrupt (or
977 * directly). In either case, when the device says it's ready for a
978 * packet, we schedule the packet transfer to occur about 2-3 ticks
979 * later in transfer_pc2.
980 */
981 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
982 {
983 idefloppy_floppy_t *floppy = drive->driver_data;
984
985 /* Send the actual packet */
986 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
987 /* Timeout for the packet command */
988 return IDEFLOPPY_WAIT_CMD;
989 }
990
991 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
992 {
993 idefloppy_floppy_t *floppy = drive->driver_data;
994 ide_startstop_t startstop;
995 atapi_ireason_t ireason;
996
997 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
998 printk(KERN_ERR "ide-floppy: Strange, packet command "
999 "initiated yet DRQ isn't asserted\n");
1000 return startstop;
1001 }
1002 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
1003 if (!ireason.b.cod || ireason.b.io) {
1004 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
1005 "while issuing a packet command\n");
1006 return ide_do_reset(drive);
1007 }
1008 /*
1009 * The following delay solves a problem with ATAPI Zip 100 drives
1010 * where the Busy flag was apparently being deasserted before the
1011 * unit was ready to receive data. This was happening on a
1012 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
1013 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
1014 * used until after the packet is moved in about 50 msec.
1015 */
1016 BUG_ON(HWGROUP(drive)->handler != NULL);
1017 ide_set_handler(drive,
1018 &idefloppy_pc_intr, /* service routine for packet command */
1019 floppy->ticks, /* wait this long before "failing" */
1020 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */
1021 return ide_started;
1022 }
1023
1024 /**
1025 * idefloppy_should_report_error()
1026 *
1027 * Supresses error messages resulting from Medium not present
1028 */
1029 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1030 {
1031 if (floppy->sense_key == 0x02 &&
1032 floppy->asc == 0x3a &&
1033 floppy->ascq == 0x00)
1034 return 0;
1035 return 1;
1036 }
1037
1038 /*
1039 * Issue a packet command
1040 */
1041 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1042 {
1043 idefloppy_floppy_t *floppy = drive->driver_data;
1044 ide_hwif_t *hwif = drive->hwif;
1045 atapi_feature_t feature;
1046 atapi_bcount_t bcount;
1047 ide_handler_t *pkt_xfer_routine;
1048
1049 #if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone
1050 and have lived on another thread's stack; that stack may have become
1051 unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */
1052 #if IDEFLOPPY_DEBUG_BUGS
1053 if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD &&
1054 pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
1055 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - "
1056 "Two request sense in serial were issued\n");
1057 }
1058 #endif /* IDEFLOPPY_DEBUG_BUGS */
1059 #endif
1060
1061 if (floppy->failed_pc == NULL &&
1062 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1063 floppy->failed_pc = pc;
1064 /* Set the current packet command */
1065 floppy->pc = pc;
1066
1067 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1068 test_bit(PC_ABORT, &pc->flags)) {
1069 /*
1070 * We will "abort" retrying a packet command in case
1071 * a legitimate error code was received.
1072 */
1073 if (!test_bit(PC_ABORT, &pc->flags)) {
1074 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1075 if (idefloppy_should_report_error(floppy))
1076 printk(KERN_ERR "ide-floppy: %s: I/O error, "
1077 "pc = %2x, key = %2x, "
1078 "asc = %2x, ascq = %2x\n",
1079 drive->name, pc->c[0],
1080 floppy->sense_key,
1081 floppy->asc, floppy->ascq);
1082 }
1083 /* Giving up */
1084 pc->error = IDEFLOPPY_ERROR_GENERAL;
1085 }
1086 floppy->failed_pc = NULL;
1087 pc->callback(drive);
1088 return ide_stopped;
1089 }
1090
1091 debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1092
1093 pc->retries++;
1094 /* We haven't transferred any data yet */
1095 pc->actually_transferred = 0;
1096 pc->current_position = pc->buffer;
1097 bcount.all = min(pc->request_transfer, 63 * 1024);
1098
1099 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) {
1100 (void)__ide_dma_off(drive);
1101 }
1102 feature.all = 0;
1103
1104 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1105 feature.b.dma = !hwif->dma_setup(drive);
1106
1107 if (IDE_CONTROL_REG)
1108 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1109 /* Use PIO/DMA */
1110 HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
1111 HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
1112 HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
1113 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1114
1115 if (feature.b.dma) { /* Begin DMA, if necessary */
1116 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1117 hwif->dma_start(drive);
1118 }
1119
1120 /* Can we transfer the packet when we get the interrupt or wait? */
1121 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1122 /* wait */
1123 pkt_xfer_routine = &idefloppy_transfer_pc1;
1124 } else {
1125 /* immediate */
1126 pkt_xfer_routine = &idefloppy_transfer_pc;
1127 }
1128
1129 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1130 /* Issue the packet command */
1131 ide_execute_command(drive, WIN_PACKETCMD,
1132 pkt_xfer_routine,
1133 IDEFLOPPY_WAIT_CMD,
1134 NULL);
1135 return ide_started;
1136 } else {
1137 /* Issue the packet command */
1138 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1139 return (*pkt_xfer_routine) (drive);
1140 }
1141 }
1142
1143 static void idefloppy_rw_callback (ide_drive_t *drive)
1144 {
1145 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1146
1147 idefloppy_do_end_request(drive, 1, 0);
1148 return;
1149 }
1150
1151 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1152 {
1153 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1154 "prevent = %d\n", prevent);
1155
1156 idefloppy_init_pc(pc);
1157 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1158 pc->c[4] = prevent;
1159 }
1160
1161 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1162 {
1163 idefloppy_init_pc(pc);
1164 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1165 pc->c[7] = 255;
1166 pc->c[8] = 255;
1167 pc->request_transfer = 255;
1168 }
1169
1170 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1171 int flags)
1172 {
1173 idefloppy_init_pc(pc);
1174 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1175 pc->c[1] = 0x17;
1176
1177 memset(pc->buffer, 0, 12);
1178 pc->buffer[1] = 0xA2;
1179 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1180
1181 if (flags & 1) /* Verify bit on... */
1182 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */
1183 pc->buffer[3] = 8;
1184
1185 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1186 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1187 pc->buffer_size=12;
1188 set_bit(PC_WRITING, &pc->flags);
1189 }
1190
1191 /*
1192 * A mode sense command is used to "sense" floppy parameters.
1193 */
1194 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1195 {
1196 u16 length = sizeof(idefloppy_mode_parameter_header_t);
1197
1198 idefloppy_init_pc(pc);
1199 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1200 pc->c[1] = 0;
1201 pc->c[2] = page_code + (type << 6);
1202
1203 switch (page_code) {
1204 case IDEFLOPPY_CAPABILITIES_PAGE:
1205 length += 12;
1206 break;
1207 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1208 length += 32;
1209 break;
1210 default:
1211 printk(KERN_ERR "ide-floppy: unsupported page code "
1212 "in create_mode_sense_cmd\n");
1213 }
1214 put_unaligned(htons(length), (u16 *) &pc->c[7]);
1215 pc->request_transfer = length;
1216 }
1217
1218 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1219 {
1220 idefloppy_init_pc(pc);
1221 pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1222 pc->c[4] = start;
1223 }
1224
1225 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1226 {
1227 idefloppy_init_pc(pc);
1228 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1229 }
1230
1231 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1232 {
1233 int block = sector / floppy->bs_factor;
1234 int blocks = rq->nr_sectors / floppy->bs_factor;
1235 int cmd = rq_data_dir(rq);
1236
1237 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1238 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1239 block, blocks);
1240
1241 idefloppy_init_pc(pc);
1242 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1243 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1244 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1245 } else {
1246 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1247 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1248 }
1249 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1250 pc->callback = &idefloppy_rw_callback;
1251 pc->rq = rq;
1252 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1253 if (rq->cmd_flags & REQ_RW)
1254 set_bit(PC_WRITING, &pc->flags);
1255 pc->buffer = NULL;
1256 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1257 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1258 }
1259
1260 static int
1261 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1262 {
1263 /*
1264 * just support eject for now, it would not be hard to make the
1265 * REQ_BLOCK_PC support fully-featured
1266 */
1267 if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD)
1268 return 1;
1269
1270 idefloppy_init_pc(pc);
1271 memcpy(pc->c, rq->cmd, sizeof(pc->c));
1272 return 0;
1273 }
1274
1275 /*
1276 * idefloppy_do_request is our request handling function.
1277 */
1278 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1279 {
1280 idefloppy_floppy_t *floppy = drive->driver_data;
1281 idefloppy_pc_t *pc;
1282 unsigned long block = (unsigned long)block_s;
1283
1284 debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
1285 rq->rq_disk ? rq->rq_disk->disk_name : "?",
1286 rq->flags, rq->errors);
1287 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1288 "current_nr_sectors: %d\n", (long)rq->sector,
1289 rq->nr_sectors, rq->current_nr_sectors);
1290
1291 if (rq->errors >= ERROR_MAX) {
1292 if (floppy->failed_pc != NULL) {
1293 if (idefloppy_should_report_error(floppy))
1294 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1295 " key = %2x, asc = %2x, ascq = %2x\n",
1296 drive->name, floppy->failed_pc->c[0],
1297 floppy->sense_key, floppy->asc, floppy->ascq);
1298 }
1299 else
1300 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1301 drive->name);
1302 idefloppy_do_end_request(drive, 0, 0);
1303 return ide_stopped;
1304 }
1305 if (blk_fs_request(rq)) {
1306 if (((long)rq->sector % floppy->bs_factor) ||
1307 (rq->nr_sectors % floppy->bs_factor)) {
1308 printk("%s: unsupported r/w request size\n",
1309 drive->name);
1310 idefloppy_do_end_request(drive, 0, 0);
1311 return ide_stopped;
1312 }
1313 pc = idefloppy_next_pc_storage(drive);
1314 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1315 } else if (blk_special_request(rq)) {
1316 pc = (idefloppy_pc_t *) rq->buffer;
1317 } else if (blk_pc_request(rq)) {
1318 pc = idefloppy_next_pc_storage(drive);
1319 if (idefloppy_blockpc_cmd(floppy, pc, rq)) {
1320 idefloppy_do_end_request(drive, 0, 0);
1321 return ide_stopped;
1322 }
1323 } else {
1324 blk_dump_rq_flags(rq,
1325 "ide-floppy: unsupported command in queue");
1326 idefloppy_do_end_request(drive, 0, 0);
1327 return ide_stopped;
1328 }
1329
1330 pc->rq = rq;
1331 return idefloppy_issue_pc(drive, pc);
1332 }
1333
1334 /*
1335 * idefloppy_queue_pc_tail adds a special packet command request to the
1336 * tail of the request queue, and waits for it to be serviced.
1337 */
1338 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1339 {
1340 struct ide_floppy_obj *floppy = drive->driver_data;
1341 struct request rq;
1342
1343 ide_init_drive_cmd (&rq);
1344 rq.buffer = (char *) pc;
1345 rq.cmd_type = REQ_TYPE_SPECIAL;
1346 rq.rq_disk = floppy->disk;
1347
1348 return ide_do_drive_cmd(drive, &rq, ide_wait);
1349 }
1350
1351 /*
1352 * Look at the flexible disk page parameters. We will ignore the CHS
1353 * capacity parameters and use the LBA parameters instead.
1354 */
1355 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1356 {
1357 idefloppy_floppy_t *floppy = drive->driver_data;
1358 idefloppy_pc_t pc;
1359 idefloppy_mode_parameter_header_t *header;
1360 idefloppy_flexible_disk_page_t *page;
1361 int capacity, lba_capacity;
1362
1363 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1364 if (idefloppy_queue_pc_tail(drive,&pc)) {
1365 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1366 "page parameters\n");
1367 return 1;
1368 }
1369 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1370 floppy->wp = header->wp;
1371 set_disk_ro(floppy->disk, floppy->wp);
1372 page = (idefloppy_flexible_disk_page_t *) (header + 1);
1373
1374 page->transfer_rate = ntohs(page->transfer_rate);
1375 page->sector_size = ntohs(page->sector_size);
1376 page->cyls = ntohs(page->cyls);
1377 page->rpm = ntohs(page->rpm);
1378 capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1379 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1380 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1381 "%d sector size, %d rpm\n",
1382 drive->name, capacity / 1024, page->cyls,
1383 page->heads, page->sectors,
1384 page->transfer_rate / 8, page->sector_size, page->rpm);
1385
1386 floppy->flexible_disk_page = *page;
1387 drive->bios_cyl = page->cyls;
1388 drive->bios_head = page->heads;
1389 drive->bios_sect = page->sectors;
1390 lba_capacity = floppy->blocks * floppy->block_size;
1391 if (capacity < lba_capacity) {
1392 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1393 "bytes, but the drive only handles %d\n",
1394 drive->name, lba_capacity, capacity);
1395 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1396 }
1397 return 0;
1398 }
1399
1400 static int idefloppy_get_capability_page(ide_drive_t *drive)
1401 {
1402 idefloppy_floppy_t *floppy = drive->driver_data;
1403 idefloppy_pc_t pc;
1404 idefloppy_mode_parameter_header_t *header;
1405 idefloppy_capabilities_page_t *page;
1406
1407 floppy->srfp = 0;
1408 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1409 MODE_SENSE_CURRENT);
1410
1411 set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1412 if (idefloppy_queue_pc_tail(drive,&pc)) {
1413 return 1;
1414 }
1415
1416 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1417 page= (idefloppy_capabilities_page_t *)(header+1);
1418 floppy->srfp = page->srfp;
1419 return (0);
1420 }
1421
1422 /*
1423 * Determine if a media is present in the floppy drive, and if so,
1424 * its LBA capacity.
1425 */
1426 static int idefloppy_get_capacity (ide_drive_t *drive)
1427 {
1428 idefloppy_floppy_t *floppy = drive->driver_data;
1429 idefloppy_pc_t pc;
1430 idefloppy_capacity_header_t *header;
1431 idefloppy_capacity_descriptor_t *descriptor;
1432 int i, descriptors, rc = 1, blocks, length;
1433
1434 drive->bios_cyl = 0;
1435 drive->bios_head = drive->bios_sect = 0;
1436 floppy->blocks = floppy->bs_factor = 0;
1437 set_capacity(floppy->disk, 0);
1438
1439 idefloppy_create_read_capacity_cmd(&pc);
1440 if (idefloppy_queue_pc_tail(drive, &pc)) {
1441 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1442 return 1;
1443 }
1444 header = (idefloppy_capacity_header_t *) pc.buffer;
1445 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1446 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1447
1448 for (i = 0; i < descriptors; i++, descriptor++) {
1449 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1450 length = descriptor->length = ntohs(descriptor->length);
1451
1452 if (!i)
1453 {
1454 switch (descriptor->dc) {
1455 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1456 case CAPACITY_UNFORMATTED:
1457 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1458 /*
1459 * If it is not a clik drive, break out
1460 * (maintains previous driver behaviour)
1461 */
1462 break;
1463 case CAPACITY_CURRENT:
1464 /* Normal Zip/LS-120 disks */
1465 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1466 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1467 "sector size\n", drive->name,
1468 blocks * length / 1024, blocks, length);
1469 floppy->capacity = *descriptor;
1470 if (!length || length % 512) {
1471 printk(KERN_NOTICE "%s: %d bytes block size "
1472 "not supported\n", drive->name, length);
1473 } else {
1474 floppy->blocks = blocks;
1475 floppy->block_size = length;
1476 if ((floppy->bs_factor = length / 512) != 1)
1477 printk(KERN_NOTICE "%s: warning: non "
1478 "512 bytes block size not "
1479 "fully supported\n",
1480 drive->name);
1481 rc = 0;
1482 }
1483 break;
1484 case CAPACITY_NO_CARTRIDGE:
1485 /*
1486 * This is a KERN_ERR so it appears on screen
1487 * for the user to see
1488 */
1489 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1490 break;
1491 case CAPACITY_INVALID:
1492 printk(KERN_ERR "%s: Invalid capacity for disk "
1493 "in drive\n", drive->name);
1494 break;
1495 }
1496 }
1497 if (!i) {
1498 debug_log( "Descriptor 0 Code: %d\n",
1499 descriptor->dc);
1500 }
1501 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1502 "sector size\n", i, blocks * length / 1024, blocks,
1503 length);
1504 }
1505
1506 /* Clik! disk does not support get_flexible_disk_page */
1507 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1508 (void) idefloppy_get_flexible_disk_page(drive);
1509 }
1510
1511 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1512 return rc;
1513 }
1514
1515 /*
1516 ** Obtain the list of formattable capacities.
1517 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1518 ** descriptors to userland, instead of our own structures.
1519 **
1520 ** Userland gives us the following structure:
1521 **
1522 ** struct idefloppy_format_capacities {
1523 ** int nformats;
1524 ** struct {
1525 ** int nblocks;
1526 ** int blocksize;
1527 ** } formats[];
1528 ** } ;
1529 **
1530 ** userland initializes nformats to the number of allocated formats[]
1531 ** records. On exit we set nformats to the number of records we've
1532 ** actually initialized.
1533 **
1534 */
1535
1536 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1537 {
1538 idefloppy_pc_t pc;
1539 idefloppy_capacity_header_t *header;
1540 idefloppy_capacity_descriptor_t *descriptor;
1541 int i, descriptors, blocks, length;
1542 int u_array_size;
1543 int u_index;
1544 int __user *argp;
1545
1546 if (get_user(u_array_size, arg))
1547 return (-EFAULT);
1548
1549 if (u_array_size <= 0)
1550 return (-EINVAL);
1551
1552 idefloppy_create_read_capacity_cmd(&pc);
1553 if (idefloppy_queue_pc_tail(drive, &pc)) {
1554 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1555 return (-EIO);
1556 }
1557 header = (idefloppy_capacity_header_t *) pc.buffer;
1558 descriptors = header->length /
1559 sizeof(idefloppy_capacity_descriptor_t);
1560 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1561
1562 u_index = 0;
1563 argp = arg + 1;
1564
1565 /*
1566 ** We always skip the first capacity descriptor. That's the
1567 ** current capacity. We are interested in the remaining descriptors,
1568 ** the formattable capacities.
1569 */
1570
1571 for (i=0; i<descriptors; i++, descriptor++) {
1572 if (u_index >= u_array_size)
1573 break; /* User-supplied buffer too small */
1574 if (i == 0)
1575 continue; /* Skip the first descriptor */
1576
1577 blocks = ntohl(descriptor->blocks);
1578 length = ntohs(descriptor->length);
1579
1580 if (put_user(blocks, argp))
1581 return(-EFAULT);
1582 ++argp;
1583
1584 if (put_user(length, argp))
1585 return (-EFAULT);
1586 ++argp;
1587
1588 ++u_index;
1589 }
1590
1591 if (put_user(u_index, arg))
1592 return (-EFAULT);
1593 return (0);
1594 }
1595
1596 /*
1597 ** Send ATAPI_FORMAT_UNIT to the drive.
1598 **
1599 ** Userland gives us the following structure:
1600 **
1601 ** struct idefloppy_format_command {
1602 ** int nblocks;
1603 ** int blocksize;
1604 ** int flags;
1605 ** } ;
1606 **
1607 ** flags is a bitmask, currently, the only defined flag is:
1608 **
1609 ** 0x01 - verify media after format.
1610 */
1611
1612 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1613 {
1614 int blocks;
1615 int length;
1616 int flags;
1617 idefloppy_pc_t pc;
1618
1619 if (get_user(blocks, arg) ||
1620 get_user(length, arg+1) ||
1621 get_user(flags, arg+2)) {
1622 return (-EFAULT);
1623 }
1624
1625 /* Get the SFRP bit */
1626 (void) idefloppy_get_capability_page(drive);
1627 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1628 if (idefloppy_queue_pc_tail(drive, &pc)) {
1629 return (-EIO);
1630 }
1631
1632 return (0);
1633 }
1634
1635 /*
1636 ** Get ATAPI_FORMAT_UNIT progress indication.
1637 **
1638 ** Userland gives a pointer to an int. The int is set to a progress
1639 ** indicator 0-65536, with 65536=100%.
1640 **
1641 ** If the drive does not support format progress indication, we just check
1642 ** the dsc bit, and return either 0 or 65536.
1643 */
1644
1645 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1646 {
1647 idefloppy_floppy_t *floppy = drive->driver_data;
1648 idefloppy_pc_t pc;
1649 int progress_indication = 0x10000;
1650
1651 if (floppy->srfp) {
1652 idefloppy_create_request_sense_cmd(&pc);
1653 if (idefloppy_queue_pc_tail(drive, &pc)) {
1654 return (-EIO);
1655 }
1656
1657 if (floppy->sense_key == 2 &&
1658 floppy->asc == 4 &&
1659 floppy->ascq == 4) {
1660 progress_indication = floppy->progress_indication;
1661 }
1662 /* Else assume format_unit has finished, and we're
1663 ** at 0x10000 */
1664 } else {
1665 atapi_status_t status;
1666 unsigned long flags;
1667
1668 local_irq_save(flags);
1669 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
1670 local_irq_restore(flags);
1671
1672 progress_indication = !status.b.dsc ? 0 : 0x10000;
1673 }
1674 if (put_user(progress_indication, arg))
1675 return (-EFAULT);
1676
1677 return (0);
1678 }
1679
1680 /*
1681 * Return the current floppy capacity.
1682 */
1683 static sector_t idefloppy_capacity (ide_drive_t *drive)
1684 {
1685 idefloppy_floppy_t *floppy = drive->driver_data;
1686 unsigned long capacity = floppy->blocks * floppy->bs_factor;
1687
1688 return capacity;
1689 }
1690
1691 /*
1692 * idefloppy_identify_device checks if we can support a drive,
1693 * based on the ATAPI IDENTIFY command results.
1694 */
1695 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1696 {
1697 struct idefloppy_id_gcw gcw;
1698 #if IDEFLOPPY_DEBUG_INFO
1699 u16 mask,i;
1700 char buffer[80];
1701 #endif /* IDEFLOPPY_DEBUG_INFO */
1702
1703 *((u16 *) &gcw) = id->config;
1704
1705 #ifdef CONFIG_PPC
1706 /* kludge for Apple PowerBook internal zip */
1707 if ((gcw.device_type == 5) &&
1708 !strstr(id->model, "CD-ROM") &&
1709 strstr(id->model, "ZIP"))
1710 gcw.device_type = 0;
1711 #endif
1712
1713 #if IDEFLOPPY_DEBUG_INFO
1714 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1715 switch (gcw.protocol) {
1716 case 0: case 1: sprintf(buffer, "ATA");break;
1717 case 2: sprintf(buffer, "ATAPI");break;
1718 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1719 }
1720 printk(KERN_INFO "Protocol Type: %s\n", buffer);
1721 switch (gcw.device_type) {
1722 case 0: sprintf(buffer, "Direct-access Device");break;
1723 case 1: sprintf(buffer, "Streaming Tape Device");break;
1724 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1725 case 5: sprintf(buffer, "CD-ROM Device");break;
1726 case 6: sprintf(buffer, "Reserved");
1727 case 7: sprintf(buffer, "Optical memory Device");break;
1728 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1729 default: sprintf(buffer, "Reserved");
1730 }
1731 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1732 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1733 switch (gcw.drq_type) {
1734 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1735 case 1: sprintf(buffer, "Interrupt DRQ");break;
1736 case 2: sprintf(buffer, "Accelerated DRQ");break;
1737 case 3: sprintf(buffer, "Reserved");break;
1738 }
1739 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1740 switch (gcw.packet_size) {
1741 case 0: sprintf(buffer, "12 bytes");break;
1742 case 1: sprintf(buffer, "16 bytes");break;
1743 default: sprintf(buffer, "Reserved");break;
1744 }
1745 printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1746 printk(KERN_INFO "Model: %.40s\n",id->model);
1747 printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1748 printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1749 printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1750 printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1751 printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1752 printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1753 printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1754 printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1755 printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1756 printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1757 printk(KERN_INFO "Single Word DMA supported modes:\n");
1758 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1759 if (id->dma_1word & mask)
1760 printk(KERN_INFO " Mode %d%s\n", i,
1761 (id->dma_1word & (mask << 8)) ? " (active)" : "");
1762 }
1763 printk(KERN_INFO "Multi Word DMA supported modes:\n");
1764 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1765 if (id->dma_mword & mask)
1766 printk(KERN_INFO " Mode %d%s\n", i,
1767 (id->dma_mword & (mask << 8)) ? " (active)" : "");
1768 }
1769 if (id->field_valid & 0x0002) {
1770 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1771 id->eide_pio_modes & 1 ? "Mode 3":"None");
1772 if (id->eide_dma_min == 0)
1773 sprintf(buffer, "Not supported");
1774 else
1775 sprintf(buffer, "%d ns",id->eide_dma_min);
1776 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1777 if (id->eide_dma_time == 0)
1778 sprintf(buffer, "Not supported");
1779 else
1780 sprintf(buffer, "%d ns",id->eide_dma_time);
1781 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1782 if (id->eide_pio == 0)
1783 sprintf(buffer, "Not supported");
1784 else
1785 sprintf(buffer, "%d ns",id->eide_pio);
1786 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1787 buffer);
1788 if (id->eide_pio_iordy == 0)
1789 sprintf(buffer, "Not supported");
1790 else
1791 sprintf(buffer, "%d ns",id->eide_pio_iordy);
1792 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1793 } else
1794 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1795 #endif /* IDEFLOPPY_DEBUG_INFO */
1796
1797 if (gcw.protocol != 2)
1798 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1799 else if (gcw.device_type != 0)
1800 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1801 else if (!gcw.removable)
1802 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1803 else if (gcw.drq_type == 3) {
1804 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1805 } else if (gcw.packet_size != 0) {
1806 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1807 } else
1808 return 1;
1809 return 0;
1810 }
1811
1812 static void idefloppy_add_settings(ide_drive_t *drive)
1813 {
1814 idefloppy_floppy_t *floppy = drive->driver_data;
1815
1816 /*
1817 * drive setting name read/write ioctl ioctl data type min max mul_factor div_factor data pointer set function
1818 */
1819 ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
1820 ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
1821 ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
1822 ide_add_setting(drive, "ticks", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL);
1823 }
1824
1825 /*
1826 * Driver initialization.
1827 */
1828 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1829 {
1830 struct idefloppy_id_gcw gcw;
1831
1832 *((u16 *) &gcw) = drive->id->config;
1833 floppy->pc = floppy->pc_stack;
1834 if (gcw.drq_type == 1)
1835 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1836 /*
1837 * We used to check revisions here. At this point however
1838 * I'm giving up. Just assume they are all broken, its easier.
1839 *
1840 * The actual reason for the workarounds was likely
1841 * a driver bug after all rather than a firmware bug,
1842 * and the workaround below used to hide it. It should
1843 * be fixed as of version 1.9, but to be on the safe side
1844 * we'll leave the limitation below for the 2.2.x tree.
1845 */
1846
1847 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1848 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1849 /* This value will be visible in the /proc/ide/hdx/settings */
1850 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1851 blk_queue_max_sectors(drive->queue, 64);
1852 }
1853
1854 /*
1855 * Guess what? The IOMEGA Clik! drive also needs the
1856 * above fix. It makes nasty clicking noises without
1857 * it, so please don't remove this.
1858 */
1859 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1860 blk_queue_max_sectors(drive->queue, 64);
1861 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1862 }
1863
1864
1865 (void) idefloppy_get_capacity(drive);
1866 idefloppy_add_settings(drive);
1867 }
1868
1869 static void ide_floppy_remove(ide_drive_t *drive)
1870 {
1871 idefloppy_floppy_t *floppy = drive->driver_data;
1872 struct gendisk *g = floppy->disk;
1873
1874 ide_unregister_subdriver(drive, floppy->driver);
1875
1876 del_gendisk(g);
1877
1878 ide_floppy_put(floppy);
1879 }
1880
1881 static void ide_floppy_release(struct kref *kref)
1882 {
1883 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1884 ide_drive_t *drive = floppy->drive;
1885 struct gendisk *g = floppy->disk;
1886
1887 drive->driver_data = NULL;
1888 g->private_data = NULL;
1889 put_disk(g);
1890 kfree(floppy);
1891 }
1892
1893 #ifdef CONFIG_PROC_FS
1894
1895 static int proc_idefloppy_read_capacity
1896 (char *page, char **start, off_t off, int count, int *eof, void *data)
1897 {
1898 ide_drive_t*drive = (ide_drive_t *)data;
1899 int len;
1900
1901 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1902 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1903 }
1904
1905 static ide_proc_entry_t idefloppy_proc[] = {
1906 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
1907 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
1908 { NULL, 0, NULL, NULL }
1909 };
1910
1911 #else
1912
1913 #define idefloppy_proc NULL
1914
1915 #endif /* CONFIG_PROC_FS */
1916
1917 static int ide_floppy_probe(ide_drive_t *);
1918
1919 static ide_driver_t idefloppy_driver = {
1920 .gen_driver = {
1921 .owner = THIS_MODULE,
1922 .name = "ide-floppy",
1923 .bus = &ide_bus_type,
1924 },
1925 .probe = ide_floppy_probe,
1926 .remove = ide_floppy_remove,
1927 .version = IDEFLOPPY_VERSION,
1928 .media = ide_floppy,
1929 .supports_dsc_overlap = 0,
1930 .do_request = idefloppy_do_request,
1931 .end_request = idefloppy_do_end_request,
1932 .error = __ide_error,
1933 .abort = __ide_abort,
1934 .proc = idefloppy_proc,
1935 };
1936
1937 static int idefloppy_open(struct inode *inode, struct file *filp)
1938 {
1939 struct gendisk *disk = inode->i_bdev->bd_disk;
1940 struct ide_floppy_obj *floppy;
1941 ide_drive_t *drive;
1942 idefloppy_pc_t pc;
1943 int ret = 0;
1944
1945 debug_log(KERN_INFO "Reached idefloppy_open\n");
1946
1947 if (!(floppy = ide_floppy_get(disk)))
1948 return -ENXIO;
1949
1950 drive = floppy->drive;
1951
1952 drive->usage++;
1953
1954 if (drive->usage == 1) {
1955 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1956 /* Just in case */
1957
1958 idefloppy_create_test_unit_ready_cmd(&pc);
1959 if (idefloppy_queue_pc_tail(drive, &pc)) {
1960 idefloppy_create_start_stop_cmd(&pc, 1);
1961 (void) idefloppy_queue_pc_tail(drive, &pc);
1962 }
1963
1964 if (idefloppy_get_capacity (drive)
1965 && (filp->f_flags & O_NDELAY) == 0
1966 /*
1967 ** Allow O_NDELAY to open a drive without a disk, or with
1968 ** an unreadable disk, so that we can get the format
1969 ** capacity of the drive or begin the format - Sam
1970 */
1971 ) {
1972 drive->usage--;
1973 ret = -EIO;
1974 goto out_put_floppy;
1975 }
1976
1977 if (floppy->wp && (filp->f_mode & 2)) {
1978 drive->usage--;
1979 ret = -EROFS;
1980 goto out_put_floppy;
1981 }
1982 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1983 /* IOMEGA Clik! drives do not support lock/unlock commands */
1984 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1985 idefloppy_create_prevent_cmd(&pc, 1);
1986 (void) idefloppy_queue_pc_tail(drive, &pc);
1987 }
1988 check_disk_change(inode->i_bdev);
1989 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1990 drive->usage--;
1991 ret = -EBUSY;
1992 goto out_put_floppy;
1993 }
1994 return 0;
1995
1996 out_put_floppy:
1997 ide_floppy_put(floppy);
1998 return ret;
1999 }
2000
2001 static int idefloppy_release(struct inode *inode, struct file *filp)
2002 {
2003 struct gendisk *disk = inode->i_bdev->bd_disk;
2004 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2005 ide_drive_t *drive = floppy->drive;
2006 idefloppy_pc_t pc;
2007
2008 debug_log(KERN_INFO "Reached idefloppy_release\n");
2009
2010 if (drive->usage == 1) {
2011 /* IOMEGA Clik! drives do not support lock/unlock commands */
2012 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2013 idefloppy_create_prevent_cmd(&pc, 0);
2014 (void) idefloppy_queue_pc_tail(drive, &pc);
2015 }
2016
2017 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2018 }
2019 drive->usage--;
2020
2021 ide_floppy_put(floppy);
2022
2023 return 0;
2024 }
2025
2026 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
2027 {
2028 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2029 ide_drive_t *drive = floppy->drive;
2030
2031 geo->heads = drive->bios_head;
2032 geo->sectors = drive->bios_sect;
2033 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
2034 return 0;
2035 }
2036
2037 static int idefloppy_ioctl(struct inode *inode, struct file *file,
2038 unsigned int cmd, unsigned long arg)
2039 {
2040 struct block_device *bdev = inode->i_bdev;
2041 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2042 ide_drive_t *drive = floppy->drive;
2043 void __user *argp = (void __user *)arg;
2044 int err;
2045 int prevent = (arg) ? 1 : 0;
2046 idefloppy_pc_t pc;
2047
2048 switch (cmd) {
2049 case CDROMEJECT:
2050 prevent = 0;
2051 /* fall through */
2052 case CDROM_LOCKDOOR:
2053 if (drive->usage > 1)
2054 return -EBUSY;
2055
2056 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2057 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2058 idefloppy_create_prevent_cmd(&pc, prevent);
2059 (void) idefloppy_queue_pc_tail(drive, &pc);
2060 }
2061 if (cmd == CDROMEJECT) {
2062 idefloppy_create_start_stop_cmd(&pc, 2);
2063 (void) idefloppy_queue_pc_tail(drive, &pc);
2064 }
2065 return 0;
2066 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2067 return 0;
2068 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2069 return idefloppy_get_format_capacities(drive, argp);
2070 case IDEFLOPPY_IOCTL_FORMAT_START:
2071
2072 if (!(file->f_mode & 2))
2073 return -EPERM;
2074
2075 if (drive->usage > 1) {
2076 /* Don't format if someone is using the disk */
2077
2078 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2079 &floppy->flags);
2080 return -EBUSY;
2081 }
2082
2083 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2084
2085 err = idefloppy_begin_format(drive, argp);
2086 if (err)
2087 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2088 return err;
2089 /*
2090 ** Note, the bit will be cleared when the device is
2091 ** closed. This is the cleanest way to handle the
2092 ** situation where the drive does not support
2093 ** format progress reporting.
2094 */
2095 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2096 return idefloppy_get_format_progress(drive, argp);
2097 }
2098 return generic_ide_ioctl(drive, file, bdev, cmd, arg);
2099 }
2100
2101 static int idefloppy_media_changed(struct gendisk *disk)
2102 {
2103 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2104 ide_drive_t *drive = floppy->drive;
2105
2106 /* do not scan partitions twice if this is a removable device */
2107 if (drive->attach) {
2108 drive->attach = 0;
2109 return 0;
2110 }
2111 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2112 }
2113
2114 static int idefloppy_revalidate_disk(struct gendisk *disk)
2115 {
2116 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2117 set_capacity(disk, idefloppy_capacity(floppy->drive));
2118 return 0;
2119 }
2120
2121 static struct block_device_operations idefloppy_ops = {
2122 .owner = THIS_MODULE,
2123 .open = idefloppy_open,
2124 .release = idefloppy_release,
2125 .ioctl = idefloppy_ioctl,
2126 .getgeo = idefloppy_getgeo,
2127 .media_changed = idefloppy_media_changed,
2128 .revalidate_disk= idefloppy_revalidate_disk
2129 };
2130
2131 static int ide_floppy_probe(ide_drive_t *drive)
2132 {
2133 idefloppy_floppy_t *floppy;
2134 struct gendisk *g;
2135
2136 if (!strstr("ide-floppy", drive->driver_req))
2137 goto failed;
2138 if (!drive->present)
2139 goto failed;
2140 if (drive->media != ide_floppy)
2141 goto failed;
2142 if (!idefloppy_identify_device (drive, drive->id)) {
2143 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2144 goto failed;
2145 }
2146 if (drive->scsi) {
2147 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2148 goto failed;
2149 }
2150 if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2151 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2152 goto failed;
2153 }
2154
2155 g = alloc_disk(1 << PARTN_BITS);
2156 if (!g)
2157 goto out_free_floppy;
2158
2159 ide_init_disk(g, drive);
2160
2161 ide_register_subdriver(drive, &idefloppy_driver);
2162
2163 kref_init(&floppy->kref);
2164
2165 floppy->drive = drive;
2166 floppy->driver = &idefloppy_driver;
2167 floppy->disk = g;
2168
2169 g->private_data = &floppy->driver;
2170
2171 drive->driver_data = floppy;
2172
2173 idefloppy_setup (drive, floppy);
2174
2175 g->minors = 1 << PARTN_BITS;
2176 g->driverfs_dev = &drive->gendev;
2177 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2178 g->fops = &idefloppy_ops;
2179 drive->attach = 1;
2180 add_disk(g);
2181 return 0;
2182
2183 out_free_floppy:
2184 kfree(floppy);
2185 failed:
2186 return -ENODEV;
2187 }
2188
2189 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2190
2191 static void __exit idefloppy_exit (void)
2192 {
2193 driver_unregister(&idefloppy_driver.gen_driver);
2194 }
2195
2196 static int __init idefloppy_init(void)
2197 {
2198 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2199 return driver_register(&idefloppy_driver.gen_driver);
2200 }
2201
2202 MODULE_ALIAS("ide:*m-floppy*");
2203 module_init(idefloppy_init);
2204 module_exit(idefloppy_exit);
2205 MODULE_LICENSE("GPL");
Linux with added FPC-III support