1 /*
2 * linux/drivers/ide/ide-floppy.c Version 0.99 Feb 24 2002
3 *
4 * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il>
5 * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net>
6 */
7
8 /*
9 * IDE ATAPI floppy driver.
10 *
11 * The driver currently doesn't have any fancy features, just the bare
12 * minimum read/write support.
13 *
14 * This driver supports the following IDE floppy drives:
15 *
16 * LS-120/240 SuperDisk
17 * Iomega Zip 100/250
18 * Iomega PC Card Clik!/PocketZip
19 *
20 * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many
21 * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive.
22 *
23 * Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c.
24 * Ver 0.2 Oct 31 96 Minor changes.
25 * Ver 0.3 Dec 2 96 Fixed error recovery bug.
26 * Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl.
27 * Ver 0.5 Feb 21 97 Add partitions support.
28 * Use the minimum of the LBA and CHS capacities.
29 * Avoid hwgroup->rq == NULL on the last irq.
30 * Fix potential null dereferencing with DEBUG_LOG.
31 * Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds.
32 * Add media write-protect detection.
33 * Issue START command only if TEST UNIT READY fails.
34 * Add work-around for IOMEGA ZIP revision 21.D.
35 * Remove idefloppy_get_capabilities().
36 * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of
37 * bytes requested on each interrupt to be zero.
38 * Thanks to <shanos@es.co.nz> for pointing this out.
39 * Ver 0.9.sv Jan 6 01 Sam Varshavchik <mrsam@courier-mta.com>
40 * Implement low level formatting. Reimplemented
41 * IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp
42 * bit. My LS-120 drive barfs on
43 * IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me.
44 * Compromise by not reporting a failure to get this
45 * mode page. Implemented four IOCTLs in order to
46 * implement formatting. IOCTls begin with 0x4600,
47 * 0x46 is 'F' as in Format.
48 * Jan 9 01 Userland option to select format verify.
49 * Added PC_SUPPRESS_ERROR flag - some idefloppy drives
50 * do not implement IDEFLOPPY_CAPABILITIES_PAGE, and
51 * return a sense error. Suppress error reporting in
52 * this particular case in order to avoid spurious
53 * errors in syslog. The culprit is
54 * idefloppy_get_capability_page(), so move it to
55 * idefloppy_begin_format() so that it's not used
56 * unless absolutely necessary.
57 * If drive does not support format progress indication
58 * monitor the dsc bit in the status register.
59 * Also, O_NDELAY on open will allow the device to be
60 * opened without a disk available. This can be used to
61 * open an unformatted disk, or get the device capacity.
62 * Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by
63 * <paul@paulbristow.net>
64 * Ver 0.92 Oct 22 00 Paul Bristow became official maintainer for this
65 * driver. Included Powerbook internal zip kludge.
66 * Ver 0.93 Oct 24 00 Fixed bugs for Clik! drive
67 * no disk on insert and disk change now works
68 * Ver 0.94 Oct 27 00 Tidied up to remove strstr(Clik) everywhere
69 * Ver 0.95 Nov 7 00 Brought across to kernel 2.4
70 * Ver 0.96 Jan 7 01 Actually in line with release version of 2.4.0
71 * including set_bit patch from Rusty Russell
72 * Ver 0.97 Jul 22 01 Merge 0.91-0.96 onto 0.9.sv for ac series
73 * Ver 0.97.sv Aug 3 01 Backported from 2.4.7-ac3
74 * Ver 0.98 Oct 26 01 Split idefloppy_transfer_pc into two pieces to
75 * fix a lost interrupt problem. It appears the busy
76 * bit was being deasserted by my IOMEGA ATAPI ZIP 100
77 * drive before the drive was actually ready.
78 * Ver 0.98a Oct 29 01 Expose delay value so we can play.
79 * Ver 0.99 Feb 24 02 Remove duplicate code, modify clik! detection code
80 * to support new PocketZip drives
81 */
82
83 #define IDEFLOPPY_VERSION "0.99.newide"
84
85 #include <linux/config.h>
86 #include <linux/module.h>
87 #include <linux/types.h>
88 #include <linux/string.h>
89 #include <linux/kernel.h>
90 #include <linux/delay.h>
91 #include <linux/timer.h>
92 #include <linux/mm.h>
93 #include <linux/interrupt.h>
94 #include <linux/major.h>
95 #include <linux/errno.h>
96 #include <linux/genhd.h>
97 #include <linux/slab.h>
98 #include <linux/cdrom.h>
99 #include <linux/ide.h>
100 #include <linux/bitops.h>
101
102 #include <asm/byteorder.h>
103 #include <asm/irq.h>
104 #include <asm/uaccess.h>
105 #include <asm/io.h>
106 #include <asm/unaligned.h>
107
108 /*
109 * The following are used to debug the driver.
110 */
111 #define IDEFLOPPY_DEBUG_LOG 0
112 #define IDEFLOPPY_DEBUG_INFO 0
113 #define IDEFLOPPY_DEBUG_BUGS 1
114
115 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
116 #define IDEFLOPPY_DEBUG( fmt, args... )
117
118 #if IDEFLOPPY_DEBUG_LOG
119 #define debug_log printk
120 #else
121 #define debug_log(fmt, args... ) do {} while(0)
122 #endif
123
124
125 /*
126 * Some drives require a longer irq timeout.
127 */
128 #define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
129
130 /*
131 * After each failed packet command we issue a request sense command
132 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
133 */
134 #define IDEFLOPPY_MAX_PC_RETRIES 3
135
136 /*
137 * With each packet command, we allocate a buffer of
138 * IDEFLOPPY_PC_BUFFER_SIZE bytes.
139 */
140 #define IDEFLOPPY_PC_BUFFER_SIZE 256
141
142 /*
143 * In various places in the driver, we need to allocate storage
144 * for packet commands and requests, which will remain valid while
145 * we leave the driver to wait for an interrupt or a timeout event.
146 */
147 #define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
148
149 /*
150 * Our view of a packet command.
151 */
152 typedef struct idefloppy_packet_command_s {
153 u8 c[12]; /* Actual packet bytes */
154 int retries; /* On each retry, we increment retries */
155 int error; /* Error code */
156 int request_transfer; /* Bytes to transfer */
157 int actually_transferred; /* Bytes actually transferred */
158 int buffer_size; /* Size of our data buffer */
159 int b_count; /* Missing/Available data on the current buffer */
160 struct request *rq; /* The corresponding request */
161 u8 *buffer; /* Data buffer */
162 u8 *current_position; /* Pointer into the above buffer */
163 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */
164 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
165 unsigned long flags; /* Status/Action bit flags: long for set_bit */
166 } idefloppy_pc_t;
167
168 /*
169 * Packet command flag bits.
170 */
171 #define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */
172 #define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */
173 #define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */
174 #define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */
175 #define PC_WRITING 5 /* Data direction */
176
177 #define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */
178
179 /*
180 * Removable Block Access Capabilities Page
181 */
182 typedef struct {
183 #if defined(__LITTLE_ENDIAN_BITFIELD)
184 unsigned page_code :6; /* Page code - Should be 0x1b */
185 unsigned reserved1_6 :1; /* Reserved */
186 unsigned ps :1; /* Should be 0 */
187 #elif defined(__BIG_ENDIAN_BITFIELD)
188 unsigned ps :1; /* Should be 0 */
189 unsigned reserved1_6 :1; /* Reserved */
190 unsigned page_code :6; /* Page code - Should be 0x1b */
191 #else
192 #error "Bitfield endianness not defined! Check your byteorder.h"
193 #endif
194 u8 page_length; /* Page Length - Should be 0xa */
195 #if defined(__LITTLE_ENDIAN_BITFIELD)
196 unsigned reserved2 :6;
197 unsigned srfp :1; /* Supports reporting progress of format */
198 unsigned sflp :1; /* System floppy type device */
199 unsigned tlun :3; /* Total logical units supported by the device */
200 unsigned reserved3 :3;
201 unsigned sml :1; /* Single / Multiple lun supported */
202 unsigned ncd :1; /* Non cd optical device */
203 #elif defined(__BIG_ENDIAN_BITFIELD)
204 unsigned sflp :1; /* System floppy type device */
205 unsigned srfp :1; /* Supports reporting progress of format */
206 unsigned reserved2 :6;
207 unsigned ncd :1; /* Non cd optical device */
208 unsigned sml :1; /* Single / Multiple lun supported */
209 unsigned reserved3 :3;
210 unsigned tlun :3; /* Total logical units supported by the device */
211 #else
212 #error "Bitfield endianness not defined! Check your byteorder.h"
213 #endif
214 u8 reserved[8];
215 } idefloppy_capabilities_page_t;
216
217 /*
218 * Flexible disk page.
219 */
220 typedef struct {
221 #if defined(__LITTLE_ENDIAN_BITFIELD)
222 unsigned page_code :6; /* Page code - Should be 0x5 */
223 unsigned reserved1_6 :1; /* Reserved */
224 unsigned ps :1; /* The device is capable of saving the page */
225 #elif defined(__BIG_ENDIAN_BITFIELD)
226 unsigned ps :1; /* The device is capable of saving the page */
227 unsigned reserved1_6 :1; /* Reserved */
228 unsigned page_code :6; /* Page code - Should be 0x5 */
229 #else
230 #error "Bitfield endianness not defined! Check your byteorder.h"
231 #endif
232 u8 page_length; /* Page Length - Should be 0x1e */
233 u16 transfer_rate; /* In kilobits per second */
234 u8 heads, sectors; /* Number of heads, Number of sectors per track */
235 u16 sector_size; /* Byes per sector */
236 u16 cyls; /* Number of cylinders */
237 u8 reserved10[10];
238 u8 motor_delay; /* Motor off delay */
239 u8 reserved21[7];
240 u16 rpm; /* Rotations per minute */
241 u8 reserved30[2];
242 } idefloppy_flexible_disk_page_t;
243
244 /*
245 * Format capacity
246 */
247 typedef struct {
248 u8 reserved[3];
249 u8 length; /* Length of the following descriptors in bytes */
250 } idefloppy_capacity_header_t;
251
252 typedef struct {
253 u32 blocks; /* Number of blocks */
254 #if defined(__LITTLE_ENDIAN_BITFIELD)
255 unsigned dc :2; /* Descriptor Code */
256 unsigned reserved :6;
257 #elif defined(__BIG_ENDIAN_BITFIELD)
258 unsigned reserved :6;
259 unsigned dc :2; /* Descriptor Code */
260 #else
261 #error "Bitfield endianness not defined! Check your byteorder.h"
262 #endif
263 u8 length_msb; /* Block Length (MSB)*/
264 u16 length; /* Block Length */
265 } idefloppy_capacity_descriptor_t;
266
267 #define CAPACITY_INVALID 0x00
268 #define CAPACITY_UNFORMATTED 0x01
269 #define CAPACITY_CURRENT 0x02
270 #define CAPACITY_NO_CARTRIDGE 0x03
271
272 /*
273 * Most of our global data which we need to save even as we leave the
274 * driver due to an interrupt or a timer event is stored in a variable
275 * of type idefloppy_floppy_t, defined below.
276 */
277 typedef struct {
278 ide_drive_t *drive;
279
280 /* Current packet command */
281 idefloppy_pc_t *pc;
282 /* Last failed packet command */
283 idefloppy_pc_t *failed_pc;
284 /* Packet command stack */
285 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
286 /* Next free packet command storage space */
287 int pc_stack_index;
288 struct request rq_stack[IDEFLOPPY_PC_STACK];
289 /* We implement a circular array */
290 int rq_stack_index;
291
292 /*
293 * Last error information
294 */
295 u8 sense_key, asc, ascq;
296 /* delay this long before sending packet command */
297 u8 ticks;
298 int progress_indication;
299
300 /*
301 * Device information
302 */
303 /* Current format */
304 int blocks, block_size, bs_factor;
305 /* Last format capacity */
306 idefloppy_capacity_descriptor_t capacity;
307 /* Copy of the flexible disk page */
308 idefloppy_flexible_disk_page_t flexible_disk_page;
309 /* Write protect */
310 int wp;
311 /* Supports format progress report */
312 int srfp;
313 /* Status/Action flags */
314 unsigned long flags;
315 } idefloppy_floppy_t;
316
317 #define IDEFLOPPY_TICKS_DELAY 3 /* default delay for ZIP 100 */
318
319 /*
320 * Floppy flag bits values.
321 */
322 #define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */
323 #define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */
324 #define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */
325 #define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */
326 #define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */
327 #define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */
328
329 /*
330 * ATAPI floppy drive packet commands
331 */
332 #define IDEFLOPPY_FORMAT_UNIT_CMD 0x04
333 #define IDEFLOPPY_INQUIRY_CMD 0x12
334 #define IDEFLOPPY_MODE_SELECT_CMD 0x55
335 #define IDEFLOPPY_MODE_SENSE_CMD 0x5a
336 #define IDEFLOPPY_READ10_CMD 0x28
337 #define IDEFLOPPY_READ12_CMD 0xa8
338 #define IDEFLOPPY_READ_CAPACITY_CMD 0x23
339 #define IDEFLOPPY_REQUEST_SENSE_CMD 0x03
340 #define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e
341 #define IDEFLOPPY_SEEK_CMD 0x2b
342 #define IDEFLOPPY_START_STOP_CMD 0x1b
343 #define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00
344 #define IDEFLOPPY_VERIFY_CMD 0x2f
345 #define IDEFLOPPY_WRITE10_CMD 0x2a
346 #define IDEFLOPPY_WRITE12_CMD 0xaa
347 #define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e
348
349 /*
350 * Defines for the mode sense command
351 */
352 #define MODE_SENSE_CURRENT 0x00
353 #define MODE_SENSE_CHANGEABLE 0x01
354 #define MODE_SENSE_DEFAULT 0x02
355 #define MODE_SENSE_SAVED 0x03
356
357 /*
358 * IOCTLs used in low-level formatting.
359 */
360
361 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600
362 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601
363 #define IDEFLOPPY_IOCTL_FORMAT_START 0x4602
364 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603
365
366 #if 0
367 /*
368 * Special requests for our block device strategy routine.
369 */
370 #define IDEFLOPPY_FIRST_RQ 90
371
372 /*
373 * IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue.
374 */
375 #define IDEFLOPPY_PC_RQ 90
376
377 #define IDEFLOPPY_LAST_RQ 90
378
379 /*
380 * A macro which can be used to check if a given request command
381 * originated in the driver or in the buffer cache layer.
382 */
383 #define IDEFLOPPY_RQ_CMD(cmd) ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ))
384
385 #endif
386
387 /*
388 * Error codes which are returned in rq->errors to the higher part
389 * of the driver.
390 */
391 #define IDEFLOPPY_ERROR_GENERAL 101
392
393 /*
394 * The following is used to format the general configuration word of
395 * the ATAPI IDENTIFY DEVICE command.
396 */
397 struct idefloppy_id_gcw {
398 #if defined(__LITTLE_ENDIAN_BITFIELD)
399 unsigned packet_size :2; /* Packet Size */
400 unsigned reserved234 :3; /* Reserved */
401 unsigned drq_type :2; /* Command packet DRQ type */
402 unsigned removable :1; /* Removable media */
403 unsigned device_type :5; /* Device type */
404 unsigned reserved13 :1; /* Reserved */
405 unsigned protocol :2; /* Protocol type */
406 #elif defined(__BIG_ENDIAN_BITFIELD)
407 unsigned protocol :2; /* Protocol type */
408 unsigned reserved13 :1; /* Reserved */
409 unsigned device_type :5; /* Device type */
410 unsigned removable :1; /* Removable media */
411 unsigned drq_type :2; /* Command packet DRQ type */
412 unsigned reserved234 :3; /* Reserved */
413 unsigned packet_size :2; /* Packet Size */
414 #else
415 #error "Bitfield endianness not defined! Check your byteorder.h"
416 #endif
417 };
418
419 /*
420 * INQUIRY packet command - Data Format
421 */
422 typedef struct {
423 #if defined(__LITTLE_ENDIAN_BITFIELD)
424 unsigned device_type :5; /* Peripheral Device Type */
425 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
426 unsigned reserved1_6t0 :7; /* Reserved */
427 unsigned rmb :1; /* Removable Medium Bit */
428 unsigned ansi_version :3; /* ANSI Version */
429 unsigned ecma_version :3; /* ECMA Version */
430 unsigned iso_version :2; /* ISO Version */
431 unsigned response_format :4; /* Response Data Format */
432 unsigned reserved3_45 :2; /* Reserved */
433 unsigned reserved3_6 :1; /* TrmIOP - Reserved */
434 unsigned reserved3_7 :1; /* AENC - Reserved */
435 #elif defined(__BIG_ENDIAN_BITFIELD)
436 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
437 unsigned device_type :5; /* Peripheral Device Type */
438 unsigned rmb :1; /* Removable Medium Bit */
439 unsigned reserved1_6t0 :7; /* Reserved */
440 unsigned iso_version :2; /* ISO Version */
441 unsigned ecma_version :3; /* ECMA Version */
442 unsigned ansi_version :3; /* ANSI Version */
443 unsigned reserved3_7 :1; /* AENC - Reserved */
444 unsigned reserved3_6 :1; /* TrmIOP - Reserved */
445 unsigned reserved3_45 :2; /* Reserved */
446 unsigned response_format :4; /* Response Data Format */
447 #else
448 #error "Bitfield endianness not defined! Check your byteorder.h"
449 #endif
450 u8 additional_length; /* Additional Length (total_length-4) */
451 u8 rsv5, rsv6, rsv7; /* Reserved */
452 u8 vendor_id[8]; /* Vendor Identification */
453 u8 product_id[16]; /* Product Identification */
454 u8 revision_level[4]; /* Revision Level */
455 u8 vendor_specific[20]; /* Vendor Specific - Optional */
456 u8 reserved56t95[40]; /* Reserved - Optional */
457 /* Additional information may be returned */
458 } idefloppy_inquiry_result_t;
459
460 /*
461 * REQUEST SENSE packet command result - Data Format.
462 */
463 typedef struct {
464 #if defined(__LITTLE_ENDIAN_BITFIELD)
465 unsigned error_code :7; /* Current error (0x70) */
466 unsigned valid :1; /* The information field conforms to SFF-8070i */
467 u8 reserved1 :8; /* Reserved */
468 unsigned sense_key :4; /* Sense Key */
469 unsigned reserved2_4 :1; /* Reserved */
470 unsigned ili :1; /* Incorrect Length Indicator */
471 unsigned reserved2_67 :2;
472 #elif defined(__BIG_ENDIAN_BITFIELD)
473 unsigned valid :1; /* The information field conforms to SFF-8070i */
474 unsigned error_code :7; /* Current error (0x70) */
475 u8 reserved1 :8; /* Reserved */
476 unsigned reserved2_67 :2;
477 unsigned ili :1; /* Incorrect Length Indicator */
478 unsigned reserved2_4 :1; /* Reserved */
479 unsigned sense_key :4; /* Sense Key */
480 #else
481 #error "Bitfield endianness not defined! Check your byteorder.h"
482 #endif
483 u32 information __attribute__ ((packed));
484 u8 asl; /* Additional sense length (n-7) */
485 u32 command_specific; /* Additional command specific information */
486 u8 asc; /* Additional Sense Code */
487 u8 ascq; /* Additional Sense Code Qualifier */
488 u8 replaceable_unit_code; /* Field Replaceable Unit Code */
489 u8 sksv[3];
490 u8 pad[2]; /* Padding to 20 bytes */
491 } idefloppy_request_sense_result_t;
492
493 /*
494 * Pages of the SELECT SENSE / MODE SENSE packet commands.
495 */
496 #define IDEFLOPPY_CAPABILITIES_PAGE 0x1b
497 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05
498
499 /*
500 * Mode Parameter Header for the MODE SENSE packet command
501 */
502 typedef struct {
503 u16 mode_data_length; /* Length of the following data transfer */
504 u8 medium_type; /* Medium Type */
505 #if defined(__LITTLE_ENDIAN_BITFIELD)
506 unsigned reserved3 :7;
507 unsigned wp :1; /* Write protect */
508 #elif defined(__BIG_ENDIAN_BITFIELD)
509 unsigned wp :1; /* Write protect */
510 unsigned reserved3 :7;
511 #else
512 #error "Bitfield endianness not defined! Check your byteorder.h"
513 #endif
514 u8 reserved[4];
515 } idefloppy_mode_parameter_header_t;
516
517 /*
518 * Too bad. The drive wants to send us data which we are not ready to accept.
519 * Just throw it away.
520 */
521 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
522 {
523 while (bcount--)
524 (void) HWIF(drive)->INB(IDE_DATA_REG);
525 }
526
527 #if IDEFLOPPY_DEBUG_BUGS
528 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
529 {
530 while (bcount--)
531 HWIF(drive)->OUTB(0, IDE_DATA_REG);
532 }
533 #endif /* IDEFLOPPY_DEBUG_BUGS */
534
535
536 /*
537 * idefloppy_do_end_request is used to finish servicing a request.
538 *
539 * For read/write requests, we will call ide_end_request to pass to the
540 * next buffer.
541 */
542 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
543 {
544 idefloppy_floppy_t *floppy = drive->driver_data;
545 struct request *rq = HWGROUP(drive)->rq;
546 int error;
547
548 debug_log(KERN_INFO "Reached idefloppy_end_request\n");
549
550 switch (uptodate) {
551 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
552 case 1: error = 0; break;
553 default: error = uptodate;
554 }
555 if (error)
556 floppy->failed_pc = NULL;
557 /* Why does this happen? */
558 if (!rq)
559 return 0;
560 if (!(rq->flags & REQ_SPECIAL)) { //if (!IDEFLOPPY_RQ_CMD (rq->cmd)) {
561 /* our real local end request function */
562 ide_end_request(drive, uptodate, nsecs);
563 return 0;
564 }
565 rq->errors = error;
566 /* fixme: need to move this local also */
567 ide_end_drive_cmd(drive, 0, 0);
568 return 0;
569 }
570
571 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
572 {
573 struct request *rq = pc->rq;
574 struct bio_vec *bvec;
575 struct bio *bio;
576 unsigned long flags;
577 char *data;
578 int count, i, done = 0;
579
580 rq_for_each_bio(bio, rq) {
581 bio_for_each_segment(bvec, bio, i) {
582 if (!bcount)
583 break;
584
585 count = min(bvec->bv_len, bcount);
586
587 data = bvec_kmap_irq(bvec, &flags);
588 drive->hwif->atapi_input_bytes(drive, data, count);
589 bvec_kunmap_irq(data, &flags);
590
591 bcount -= count;
592 pc->b_count += count;
593 done += count;
594 }
595 }
596
597 idefloppy_do_end_request(drive, 1, done >> 9);
598
599 if (bcount) {
600 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
601 idefloppy_discard_data(drive, bcount);
602 }
603 }
604
605 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
606 {
607 struct request *rq = pc->rq;
608 struct bio *bio;
609 struct bio_vec *bvec;
610 unsigned long flags;
611 int count, i, done = 0;
612 char *data;
613
614 rq_for_each_bio(bio, rq) {
615 bio_for_each_segment(bvec, bio, i) {
616 if (!bcount)
617 break;
618
619 count = min(bvec->bv_len, bcount);
620
621 data = bvec_kmap_irq(bvec, &flags);
622 drive->hwif->atapi_output_bytes(drive, data, count);
623 bvec_kunmap_irq(data, &flags);
624
625 bcount -= count;
626 pc->b_count += count;
627 done += count;
628 }
629 }
630
631 idefloppy_do_end_request(drive, 1, done >> 9);
632
633 if (bcount) {
634 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
635 idefloppy_write_zeros(drive, bcount);
636 }
637 }
638
639 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
640 {
641 struct request *rq = pc->rq;
642 struct bio *bio = rq->bio;
643
644 while ((bio = rq->bio) != NULL)
645 idefloppy_do_end_request(drive, 1, 0);
646 }
647
648 /*
649 * idefloppy_queue_pc_head generates a new packet command request in front
650 * of the request queue, before the current request, so that it will be
651 * processed immediately, on the next pass through the driver.
652 */
653 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
654 {
655 ide_init_drive_cmd(rq);
656 rq->buffer = (char *) pc;
657 rq->flags = REQ_SPECIAL; //rq->cmd = IDEFLOPPY_PC_RQ;
658 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
659 }
660
661 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
662 {
663 idefloppy_floppy_t *floppy = drive->driver_data;
664
665 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
666 floppy->pc_stack_index=0;
667 return (&floppy->pc_stack[floppy->pc_stack_index++]);
668 }
669
670 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
671 {
672 idefloppy_floppy_t *floppy = drive->driver_data;
673
674 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
675 floppy->rq_stack_index = 0;
676 return (&floppy->rq_stack[floppy->rq_stack_index++]);
677 }
678
679 /*
680 * idefloppy_analyze_error is called on each failed packet command retry
681 * to analyze the request sense.
682 */
683 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
684 {
685 idefloppy_floppy_t *floppy = drive->driver_data;
686
687 floppy->sense_key = result->sense_key;
688 floppy->asc = result->asc;
689 floppy->ascq = result->ascq;
690 floppy->progress_indication = result->sksv[0] & 0x80 ?
691 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
692 if (floppy->failed_pc)
693 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
694 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
695 result->sense_key, result->asc, result->ascq);
696 else
697 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
698 "ascq = %x\n", result->sense_key,
699 result->asc, result->ascq);
700 }
701
702 static void idefloppy_request_sense_callback (ide_drive_t *drive)
703 {
704 idefloppy_floppy_t *floppy = drive->driver_data;
705
706 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
707
708 if (!floppy->pc->error) {
709 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
710 idefloppy_do_end_request(drive, 1, 0);
711 } else {
712 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
713 idefloppy_do_end_request(drive, 0, 0);
714 }
715 }
716
717 /*
718 * General packet command callback function.
719 */
720 static void idefloppy_pc_callback (ide_drive_t *drive)
721 {
722 idefloppy_floppy_t *floppy = drive->driver_data;
723
724 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
725
726 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
727 }
728
729 /*
730 * idefloppy_init_pc initializes a packet command.
731 */
732 static void idefloppy_init_pc (idefloppy_pc_t *pc)
733 {
734 memset(pc->c, 0, 12);
735 pc->retries = 0;
736 pc->flags = 0;
737 pc->request_transfer = 0;
738 pc->buffer = pc->pc_buffer;
739 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
740 pc->callback = &idefloppy_pc_callback;
741 }
742
743 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
744 {
745 idefloppy_init_pc(pc);
746 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
747 pc->c[4] = 255;
748 pc->request_transfer = 18;
749 pc->callback = &idefloppy_request_sense_callback;
750 }
751
752 /*
753 * idefloppy_retry_pc is called when an error was detected during the
754 * last packet command. We queue a request sense packet command in
755 * the head of the request list.
756 */
757 static void idefloppy_retry_pc (ide_drive_t *drive)
758 {
759 idefloppy_pc_t *pc;
760 struct request *rq;
761 atapi_error_t error;
762
763 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
764 pc = idefloppy_next_pc_storage(drive);
765 rq = idefloppy_next_rq_storage(drive);
766 idefloppy_create_request_sense_cmd(pc);
767 idefloppy_queue_pc_head(drive, pc, rq);
768 }
769
770 /*
771 * idefloppy_pc_intr is the usual interrupt handler which will be called
772 * during a packet command.
773 */
774 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
775 {
776 idefloppy_floppy_t *floppy = drive->driver_data;
777 atapi_status_t status;
778 atapi_bcount_t bcount;
779 atapi_ireason_t ireason;
780 idefloppy_pc_t *pc = floppy->pc;
781 struct request *rq = pc->rq;
782 unsigned int temp;
783
784 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
785 __FUNCTION__);
786
787 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
788 if (HWIF(drive)->ide_dma_end(drive)) {
789 set_bit(PC_DMA_ERROR, &pc->flags);
790 } else {
791 pc->actually_transferred = pc->request_transfer;
792 idefloppy_update_buffers(drive, pc);
793 }
794 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
795 }
796
797 /* Clear the interrupt */
798 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
799
800 if (!status.b.drq) { /* No more interrupts */
801 debug_log(KERN_INFO "Packet command completed, %d bytes "
802 "transferred\n", pc->actually_transferred);
803 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
804
805 local_irq_enable();
806
807 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
808 /* Error detected */
809 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
810 drive->name);
811 rq->errors++;
812 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
813 printk(KERN_ERR "ide-floppy: I/O error in "
814 "request sense command\n");
815 return ide_do_reset(drive);
816 }
817 /* Retry operation */
818 idefloppy_retry_pc(drive);
819 /* queued, but not started */
820 return ide_stopped;
821 }
822 pc->error = 0;
823 if (floppy->failed_pc == pc)
824 floppy->failed_pc = NULL;
825 /* Command finished - Call the callback function */
826 pc->callback(drive);
827 return ide_stopped;
828 }
829
830 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
831 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
832 "more interrupts in DMA mode\n");
833 (void)__ide_dma_off(drive);
834 return ide_do_reset(drive);
835 }
836
837 /* Get the number of bytes to transfer */
838 bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
839 bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
840 /* on this interrupt */
841 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
842
843 if (ireason.b.cod) {
844 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
845 return ide_do_reset(drive);
846 }
847 if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
848 /* Hopefully, we will never get here */
849 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
850 ireason.b.io ? "Write":"Read");
851 printk(KERN_ERR "but the floppy wants us to %s !\n",
852 ireason.b.io ? "Read":"Write");
853 return ide_do_reset(drive);
854 }
855 if (!test_bit(PC_WRITING, &pc->flags)) {
856 /* Reading - Check that we have enough space */
857 temp = pc->actually_transferred + bcount.all;
858 if (temp > pc->request_transfer) {
859 if (temp > pc->buffer_size) {
860 printk(KERN_ERR "ide-floppy: The floppy wants "
861 "to send us more data than expected "
862 "- discarding data\n");
863 idefloppy_discard_data(drive,bcount.all);
864 if (HWGROUP(drive)->handler != NULL)
865 BUG();
866 ide_set_handler(drive,
867 &idefloppy_pc_intr,
868 IDEFLOPPY_WAIT_CMD,
869 NULL);
870 return ide_started;
871 }
872 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
873 "send us more data than expected - "
874 "allowing transfer\n");
875 }
876 }
877 if (test_bit(PC_WRITING, &pc->flags)) {
878 if (pc->buffer != NULL)
879 /* Write the current buffer */
880 HWIF(drive)->atapi_output_bytes(drive,
881 pc->current_position,
882 bcount.all);
883 else
884 idefloppy_output_buffers(drive, pc, bcount.all);
885 } else {
886 if (pc->buffer != NULL)
887 /* Read the current buffer */
888 HWIF(drive)->atapi_input_bytes(drive,
889 pc->current_position,
890 bcount.all);
891 else
892 idefloppy_input_buffers(drive, pc, bcount.all);
893 }
894 /* Update the current position */
895 pc->actually_transferred += bcount.all;
896 pc->current_position += bcount.all;
897
898 if (HWGROUP(drive)->handler != NULL)
899 BUG();
900 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */
901 return ide_started;
902 }
903
904 /*
905 * This is the original routine that did the packet transfer.
906 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
907 * for that drive below. The algorithm is chosen based on drive type
908 */
909 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
910 {
911 ide_startstop_t startstop;
912 idefloppy_floppy_t *floppy = drive->driver_data;
913 atapi_ireason_t ireason;
914
915 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
916 printk(KERN_ERR "ide-floppy: Strange, packet command "
917 "initiated yet DRQ isn't asserted\n");
918 return startstop;
919 }
920 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
921 if (!ireason.b.cod || ireason.b.io) {
922 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
923 "issuing a packet command\n");
924 return ide_do_reset(drive);
925 }
926 if (HWGROUP(drive)->handler != NULL)
927 BUG();
928 /* Set the interrupt routine */
929 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
930 /* Send the actual packet */
931 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
932 return ide_started;
933 }
934
935
936 /*
937 * What we have here is a classic case of a top half / bottom half
938 * interrupt service routine. In interrupt mode, the device sends
939 * an interrupt to signal it's ready to receive a packet. However,
940 * we need to delay about 2-3 ticks before issuing the packet or we
941 * gets in trouble.
942 *
943 * So, follow carefully. transfer_pc1 is called as an interrupt (or
944 * directly). In either case, when the device says it's ready for a
945 * packet, we schedule the packet transfer to occur about 2-3 ticks
946 * later in transfer_pc2.
947 */
948 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
949 {
950 idefloppy_floppy_t *floppy = drive->driver_data;
951
952 /* Send the actual packet */
953 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
954 /* Timeout for the packet command */
955 return IDEFLOPPY_WAIT_CMD;
956 }
957
958 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
959 {
960 idefloppy_floppy_t *floppy = drive->driver_data;
961 ide_startstop_t startstop;
962 atapi_ireason_t ireason;
963
964 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
965 printk(KERN_ERR "ide-floppy: Strange, packet command "
966 "initiated yet DRQ isn't asserted\n");
967 return startstop;
968 }
969 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
970 if (!ireason.b.cod || ireason.b.io) {
971 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
972 "while issuing a packet command\n");
973 return ide_do_reset(drive);
974 }
975 /*
976 * The following delay solves a problem with ATAPI Zip 100 drives
977 * where the Busy flag was apparently being deasserted before the
978 * unit was ready to receive data. This was happening on a
979 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
980 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
981 * used until after the packet is moved in about 50 msec.
982 */
983 if (HWGROUP(drive)->handler != NULL)
984 BUG();
985 ide_set_handler(drive,
986 &idefloppy_pc_intr, /* service routine for packet command */
987 floppy->ticks, /* wait this long before "failing" */
988 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */
989 return ide_started;
990 }
991
992 /**
993 * idefloppy_should_report_error()
994 *
995 * Supresses error messages resulting from Medium not present
996 */
997 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
998 {
999 if (floppy->sense_key == 0x02 &&
1000 floppy->asc == 0x3a &&
1001 floppy->ascq == 0x00)
1002 return 0;
1003 return 1;
1004 }
1005
1006 /*
1007 * Issue a packet command
1008 */
1009 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1010 {
1011 idefloppy_floppy_t *floppy = drive->driver_data;
1012 ide_hwif_t *hwif = drive->hwif;
1013 atapi_feature_t feature;
1014 atapi_bcount_t bcount;
1015 ide_handler_t *pkt_xfer_routine;
1016
1017 #if IDEFLOPPY_DEBUG_BUGS
1018 if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD &&
1019 pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
1020 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - "
1021 "Two request sense in serial were issued\n");
1022 }
1023 #endif /* IDEFLOPPY_DEBUG_BUGS */
1024
1025 if (floppy->failed_pc == NULL &&
1026 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1027 floppy->failed_pc = pc;
1028 /* Set the current packet command */
1029 floppy->pc = pc;
1030
1031 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1032 test_bit(PC_ABORT, &pc->flags)) {
1033 /*
1034 * We will "abort" retrying a packet command in case
1035 * a legitimate error code was received.
1036 */
1037 if (!test_bit(PC_ABORT, &pc->flags)) {
1038 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1039 if (idefloppy_should_report_error(floppy))
1040 printk(KERN_ERR "ide-floppy: %s: I/O error, "
1041 "pc = %2x, key = %2x, "
1042 "asc = %2x, ascq = %2x\n",
1043 drive->name, pc->c[0],
1044 floppy->sense_key,
1045 floppy->asc, floppy->ascq);
1046 }
1047 /* Giving up */
1048 pc->error = IDEFLOPPY_ERROR_GENERAL;
1049 }
1050 floppy->failed_pc = NULL;
1051 pc->callback(drive);
1052 return ide_stopped;
1053 }
1054
1055 debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1056
1057 pc->retries++;
1058 /* We haven't transferred any data yet */
1059 pc->actually_transferred = 0;
1060 pc->current_position = pc->buffer;
1061 bcount.all = min(pc->request_transfer, 63 * 1024);
1062
1063 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) {
1064 (void)__ide_dma_off(drive);
1065 }
1066 feature.all = 0;
1067
1068 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1069 feature.b.dma = !hwif->dma_setup(drive);
1070
1071 if (IDE_CONTROL_REG)
1072 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1073 /* Use PIO/DMA */
1074 HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
1075 HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
1076 HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
1077 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1078
1079 if (feature.b.dma) { /* Begin DMA, if necessary */
1080 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1081 hwif->dma_start(drive);
1082 }
1083
1084 /* Can we transfer the packet when we get the interrupt or wait? */
1085 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1086 /* wait */
1087 pkt_xfer_routine = &idefloppy_transfer_pc1;
1088 } else {
1089 /* immediate */
1090 pkt_xfer_routine = &idefloppy_transfer_pc;
1091 }
1092
1093 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1094 /* Issue the packet command */
1095 ide_execute_command(drive, WIN_PACKETCMD,
1096 pkt_xfer_routine,
1097 IDEFLOPPY_WAIT_CMD,
1098 NULL);
1099 return ide_started;
1100 } else {
1101 /* Issue the packet command */
1102 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1103 return (*pkt_xfer_routine) (drive);
1104 }
1105 }
1106
1107 static void idefloppy_rw_callback (ide_drive_t *drive)
1108 {
1109 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1110
1111 idefloppy_do_end_request(drive, 1, 0);
1112 return;
1113 }
1114
1115 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1116 {
1117 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1118 "prevent = %d\n", prevent);
1119
1120 idefloppy_init_pc(pc);
1121 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1122 pc->c[4] = prevent;
1123 }
1124
1125 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1126 {
1127 idefloppy_init_pc(pc);
1128 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1129 pc->c[7] = 255;
1130 pc->c[8] = 255;
1131 pc->request_transfer = 255;
1132 }
1133
1134 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1135 int flags)
1136 {
1137 idefloppy_init_pc(pc);
1138 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1139 pc->c[1] = 0x17;
1140
1141 memset(pc->buffer, 0, 12);
1142 pc->buffer[1] = 0xA2;
1143 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1144
1145 if (flags & 1) /* Verify bit on... */
1146 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */
1147 pc->buffer[3] = 8;
1148
1149 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1150 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1151 pc->buffer_size=12;
1152 set_bit(PC_WRITING, &pc->flags);
1153 }
1154
1155 /*
1156 * A mode sense command is used to "sense" floppy parameters.
1157 */
1158 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1159 {
1160 u16 length = sizeof(idefloppy_mode_parameter_header_t);
1161
1162 idefloppy_init_pc(pc);
1163 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1164 pc->c[1] = 0;
1165 pc->c[2] = page_code + (type << 6);
1166
1167 switch (page_code) {
1168 case IDEFLOPPY_CAPABILITIES_PAGE:
1169 length += 12;
1170 break;
1171 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1172 length += 32;
1173 break;
1174 default:
1175 printk(KERN_ERR "ide-floppy: unsupported page code "
1176 "in create_mode_sense_cmd\n");
1177 }
1178 put_unaligned(htons(length), (u16 *) &pc->c[7]);
1179 pc->request_transfer = length;
1180 }
1181
1182 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1183 {
1184 idefloppy_init_pc(pc);
1185 pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1186 pc->c[4] = start;
1187 }
1188
1189 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1190 {
1191 idefloppy_init_pc(pc);
1192 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1193 }
1194
1195 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1196 {
1197 int block = sector / floppy->bs_factor;
1198 int blocks = rq->nr_sectors / floppy->bs_factor;
1199 int cmd = rq_data_dir(rq);
1200
1201 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1202 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1203 block, blocks);
1204
1205 idefloppy_init_pc(pc);
1206 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1207 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1208 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1209 } else {
1210 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1211 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1212 }
1213 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1214 pc->callback = &idefloppy_rw_callback;
1215 pc->rq = rq;
1216 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1217 if (rq->flags & REQ_RW)
1218 set_bit(PC_WRITING, &pc->flags);
1219 pc->buffer = NULL;
1220 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1221 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1222 }
1223
1224 static int
1225 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1226 {
1227 /*
1228 * just support eject for now, it would not be hard to make the
1229 * REQ_BLOCK_PC support fully-featured
1230 */
1231 if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD)
1232 return 1;
1233
1234 idefloppy_init_pc(pc);
1235 memcpy(pc->c, rq->cmd, sizeof(pc->c));
1236 return 0;
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 "rq_status: %d, dev: %s, flags: %lx, errors: %d\n",
1249 rq->rq_status, 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 (rq->flags & REQ_CMD) {
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 (rq->flags & REQ_SPECIAL) {
1280 pc = (idefloppy_pc_t *) rq->buffer;
1281 } else if (rq->flags & REQ_BLOCK_PC) {
1282 pc = idefloppy_next_pc_storage(drive);
1283 if (idefloppy_blockpc_cmd(floppy, pc, rq)) {
1284 idefloppy_do_end_request(drive, 0, 0);
1285 return ide_stopped;
1286 }
1287 } else {
1288 blk_dump_rq_flags(rq,
1289 "ide-floppy: unsupported command in queue");
1290 idefloppy_do_end_request(drive, 0, 0);
1291 return ide_stopped;
1292 }
1293
1294 pc->rq = rq;
1295 return idefloppy_issue_pc(drive, pc);
1296 }
1297
1298 /*
1299 * idefloppy_queue_pc_tail adds a special packet command request to the
1300 * tail of the request queue, and waits for it to be serviced.
1301 */
1302 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1303 {
1304 struct request rq;
1305
1306 ide_init_drive_cmd (&rq);
1307 rq.buffer = (char *) pc;
1308 rq.flags = REQ_SPECIAL; // rq.cmd = IDEFLOPPY_PC_RQ;
1309
1310 return ide_do_drive_cmd(drive, &rq, ide_wait);
1311 }
1312
1313 /*
1314 * Look at the flexible disk page parameters. We will ignore the CHS
1315 * capacity parameters and use the LBA parameters instead.
1316 */
1317 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1318 {
1319 idefloppy_floppy_t *floppy = drive->driver_data;
1320 idefloppy_pc_t pc;
1321 idefloppy_mode_parameter_header_t *header;
1322 idefloppy_flexible_disk_page_t *page;
1323 int capacity, lba_capacity;
1324
1325 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1326 if (idefloppy_queue_pc_tail(drive,&pc)) {
1327 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1328 "page parameters\n");
1329 return 1;
1330 }
1331 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1332 floppy->wp = header->wp;
1333 set_disk_ro(drive->disk, floppy->wp);
1334 page = (idefloppy_flexible_disk_page_t *) (header + 1);
1335
1336 page->transfer_rate = ntohs(page->transfer_rate);
1337 page->sector_size = ntohs(page->sector_size);
1338 page->cyls = ntohs(page->cyls);
1339 page->rpm = ntohs(page->rpm);
1340 capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1341 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1342 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1343 "%d sector size, %d rpm\n",
1344 drive->name, capacity / 1024, page->cyls,
1345 page->heads, page->sectors,
1346 page->transfer_rate / 8, page->sector_size, page->rpm);
1347
1348 floppy->flexible_disk_page = *page;
1349 drive->bios_cyl = page->cyls;
1350 drive->bios_head = page->heads;
1351 drive->bios_sect = page->sectors;
1352 lba_capacity = floppy->blocks * floppy->block_size;
1353 if (capacity < lba_capacity) {
1354 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1355 "bytes, but the drive only handles %d\n",
1356 drive->name, lba_capacity, capacity);
1357 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1358 }
1359 return 0;
1360 }
1361
1362 static int idefloppy_get_capability_page(ide_drive_t *drive)
1363 {
1364 idefloppy_floppy_t *floppy = drive->driver_data;
1365 idefloppy_pc_t pc;
1366 idefloppy_mode_parameter_header_t *header;
1367 idefloppy_capabilities_page_t *page;
1368
1369 floppy->srfp = 0;
1370 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1371 MODE_SENSE_CURRENT);
1372
1373 set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1374 if (idefloppy_queue_pc_tail(drive,&pc)) {
1375 return 1;
1376 }
1377
1378 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1379 page= (idefloppy_capabilities_page_t *)(header+1);
1380 floppy->srfp = page->srfp;
1381 return (0);
1382 }
1383
1384 /*
1385 * Determine if a media is present in the floppy drive, and if so,
1386 * its LBA capacity.
1387 */
1388 static int idefloppy_get_capacity (ide_drive_t *drive)
1389 {
1390 idefloppy_floppy_t *floppy = drive->driver_data;
1391 idefloppy_pc_t pc;
1392 idefloppy_capacity_header_t *header;
1393 idefloppy_capacity_descriptor_t *descriptor;
1394 int i, descriptors, rc = 1, blocks, length;
1395
1396 drive->bios_cyl = 0;
1397 drive->bios_head = drive->bios_sect = 0;
1398 floppy->blocks = floppy->bs_factor = 0;
1399 set_capacity(drive->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(drive->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 progresss
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 atapi_status_t status;
1628 unsigned long flags;
1629
1630 local_irq_save(flags);
1631 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
1632 local_irq_restore(flags);
1633
1634 progress_indication = !status.b.dsc ? 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 static void idefloppy_add_settings(ide_drive_t *drive)
1775 {
1776 idefloppy_floppy_t *floppy = drive->driver_data;
1777
1778 /*
1779 * drive setting name read/write ioctl ioctl data type min max mul_factor div_factor data pointer set function
1780 */
1781 ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
1782 ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
1783 ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
1784 ide_add_setting(drive, "ticks", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL);
1785 }
1786
1787 /*
1788 * Driver initialization.
1789 */
1790 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1791 {
1792 struct idefloppy_id_gcw gcw;
1793
1794 *((u16 *) &gcw) = drive->id->config;
1795 drive->driver_data = floppy;
1796 drive->ready_stat = 0;
1797 memset(floppy, 0, sizeof(idefloppy_floppy_t));
1798 floppy->drive = drive;
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 int idefloppy_cleanup (ide_drive_t *drive)
1836 {
1837 idefloppy_floppy_t *floppy = drive->driver_data;
1838 struct gendisk *g = drive->disk;
1839
1840 if (ide_unregister_subdriver(drive))
1841 return 1;
1842 drive->driver_data = NULL;
1843 kfree(floppy);
1844 del_gendisk(g);
1845 g->fops = ide_fops;
1846 return 0;
1847 }
1848
1849 #ifdef CONFIG_PROC_FS
1850
1851 static ide_proc_entry_t idefloppy_proc[] = {
1852 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
1853 { NULL, 0, NULL, NULL }
1854 };
1855
1856 #else
1857
1858 #define idefloppy_proc NULL
1859
1860 #endif /* CONFIG_PROC_FS */
1861
1862 static int idefloppy_attach(ide_drive_t *drive);
1863
1864 /*
1865 * IDE subdriver functions, registered with ide.c
1866 */
1867 static ide_driver_t idefloppy_driver = {
1868 .owner = THIS_MODULE,
1869 .name = "ide-floppy",
1870 .version = IDEFLOPPY_VERSION,
1871 .media = ide_floppy,
1872 .busy = 0,
1873 .supports_dsc_overlap = 0,
1874 .cleanup = idefloppy_cleanup,
1875 .do_request = idefloppy_do_request,
1876 .end_request = idefloppy_do_end_request,
1877 .capacity = idefloppy_capacity,
1878 .proc = idefloppy_proc,
1879 .attach = idefloppy_attach,
1880 .drives = LIST_HEAD_INIT(idefloppy_driver.drives),
1881 };
1882
1883 static int idefloppy_open(struct inode *inode, struct file *filp)
1884 {
1885 ide_drive_t *drive = inode->i_bdev->bd_disk->private_data;
1886 idefloppy_floppy_t *floppy = drive->driver_data;
1887 idefloppy_pc_t pc;
1888
1889 drive->usage++;
1890
1891 debug_log(KERN_INFO "Reached idefloppy_open\n");
1892
1893 if (drive->usage == 1) {
1894 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1895 /* Just in case */
1896
1897 idefloppy_create_test_unit_ready_cmd(&pc);
1898 if (idefloppy_queue_pc_tail(drive, &pc)) {
1899 idefloppy_create_start_stop_cmd(&pc, 1);
1900 (void) idefloppy_queue_pc_tail(drive, &pc);
1901 }
1902
1903 if (idefloppy_get_capacity (drive)
1904 && (filp->f_flags & O_NDELAY) == 0
1905 /*
1906 ** Allow O_NDELAY to open a drive without a disk, or with
1907 ** an unreadable disk, so that we can get the format
1908 ** capacity of the drive or begin the format - Sam
1909 */
1910 ) {
1911 drive->usage--;
1912 return -EIO;
1913 }
1914
1915 if (floppy->wp && (filp->f_mode & 2)) {
1916 drive->usage--;
1917 return -EROFS;
1918 }
1919 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1920 /* IOMEGA Clik! drives do not support lock/unlock commands */
1921 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1922 idefloppy_create_prevent_cmd(&pc, 1);
1923 (void) idefloppy_queue_pc_tail(drive, &pc);
1924 }
1925 check_disk_change(inode->i_bdev);
1926 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1927 drive->usage--;
1928 return -EBUSY;
1929 }
1930 return 0;
1931 }
1932
1933 static int idefloppy_release(struct inode *inode, struct file *filp)
1934 {
1935 ide_drive_t *drive = inode->i_bdev->bd_disk->private_data;
1936 idefloppy_pc_t pc;
1937
1938 debug_log(KERN_INFO "Reached idefloppy_release\n");
1939
1940 if (drive->usage == 1) {
1941 idefloppy_floppy_t *floppy = drive->driver_data;
1942
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, 0);
1946 (void) idefloppy_queue_pc_tail(drive, &pc);
1947 }
1948
1949 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1950 }
1951 drive->usage--;
1952 return 0;
1953 }
1954
1955 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1956 unsigned int cmd, unsigned long arg)
1957 {
1958 struct block_device *bdev = inode->i_bdev;
1959 ide_drive_t *drive = bdev->bd_disk->private_data;
1960 idefloppy_floppy_t *floppy = drive->driver_data;
1961 void __user *argp = (void __user *)arg;
1962 int err = generic_ide_ioctl(file, bdev, cmd, arg);
1963 int prevent = (arg) ? 1 : 0;
1964 idefloppy_pc_t pc;
1965 if (err != -EINVAL)
1966 return err;
1967
1968 switch (cmd) {
1969 case CDROMEJECT:
1970 prevent = 0;
1971 /* fall through */
1972 case CDROM_LOCKDOOR:
1973 if (drive->usage > 1)
1974 return -EBUSY;
1975
1976 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
1977 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1978 idefloppy_create_prevent_cmd(&pc, prevent);
1979 (void) idefloppy_queue_pc_tail(drive, &pc);
1980 }
1981 if (cmd == CDROMEJECT) {
1982 idefloppy_create_start_stop_cmd(&pc, 2);
1983 (void) idefloppy_queue_pc_tail(drive, &pc);
1984 }
1985 return 0;
1986 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1987 return 0;
1988 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1989 return idefloppy_get_format_capacities(drive, argp);
1990 case IDEFLOPPY_IOCTL_FORMAT_START:
1991
1992 if (!(file->f_mode & 2))
1993 return -EPERM;
1994
1995 if (drive->usage > 1) {
1996 /* Don't format if someone is using the disk */
1997
1998 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
1999 &floppy->flags);
2000 return -EBUSY;
2001 }
2002
2003 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2004
2005 err = idefloppy_begin_format(drive, argp);
2006 if (err)
2007 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2008 return err;
2009 /*
2010 ** Note, the bit will be cleared when the device is
2011 ** closed. This is the cleanest way to handle the
2012 ** situation where the drive does not support
2013 ** format progress reporting.
2014 */
2015 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2016 return idefloppy_get_format_progress(drive, argp);
2017 }
2018 return -EINVAL;
2019 }
2020
2021 static int idefloppy_media_changed(struct gendisk *disk)
2022 {
2023 ide_drive_t *drive = disk->private_data;
2024 idefloppy_floppy_t *floppy = drive->driver_data;
2025
2026 /* do not scan partitions twice if this is a removable device */
2027 if (drive->attach) {
2028 drive->attach = 0;
2029 return 0;
2030 }
2031 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2032 }
2033
2034 static int idefloppy_revalidate_disk(struct gendisk *disk)
2035 {
2036 ide_drive_t *drive = disk->private_data;
2037 set_capacity(disk, idefloppy_capacity(drive));
2038 return 0;
2039 }
2040
2041 static struct block_device_operations idefloppy_ops = {
2042 .owner = THIS_MODULE,
2043 .open = idefloppy_open,
2044 .release = idefloppy_release,
2045 .ioctl = idefloppy_ioctl,
2046 .media_changed = idefloppy_media_changed,
2047 .revalidate_disk= idefloppy_revalidate_disk
2048 };
2049
2050 static int idefloppy_attach (ide_drive_t *drive)
2051 {
2052 idefloppy_floppy_t *floppy;
2053 struct gendisk *g = drive->disk;
2054 if (!strstr("ide-floppy", drive->driver_req))
2055 goto failed;
2056 if (!drive->present)
2057 goto failed;
2058 if (drive->media != ide_floppy)
2059 goto failed;
2060 if (!idefloppy_identify_device (drive, drive->id)) {
2061 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2062 goto failed;
2063 }
2064 if (drive->scsi) {
2065 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2066 goto failed;
2067 }
2068 if ((floppy = (idefloppy_floppy_t *) kmalloc (sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2069 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2070 goto failed;
2071 }
2072 if (ide_register_subdriver(drive, &idefloppy_driver)) {
2073 printk (KERN_ERR "ide-floppy: %s: Failed to register the driver with ide.c\n", drive->name);
2074 kfree (floppy);
2075 goto failed;
2076 }
2077 DRIVER(drive)->busy++;
2078 idefloppy_setup (drive, floppy);
2079 DRIVER(drive)->busy--;
2080 g->minors = 1 << PARTN_BITS;
2081 g->driverfs_dev = &drive->gendev;
2082 strcpy(g->devfs_name, drive->devfs_name);
2083 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2084 g->fops = &idefloppy_ops;
2085 drive->attach = 1;
2086 add_disk(g);
2087 return 0;
2088 failed:
2089 return 1;
2090 }
2091
2092 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2093
2094 static void __exit idefloppy_exit (void)
2095 {
2096 ide_unregister_driver(&idefloppy_driver);
2097 }
2098
2099 /*
2100 * idefloppy_init will register the driver for each floppy.
2101 */
2102 static int idefloppy_init (void)
2103 {
2104 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2105 ide_register_driver(&idefloppy_driver);
2106 return 0;
2107 }
2108
2109 module_init(idefloppy_init);
2110 module_exit(idefloppy_exit);
2111 MODULE_LICENSE("GPL");
2112
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