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Linux v2.6.15-rc7
[pohmelfs.git] / drivers / ide / ide-floppy.c
blob9e293c8063dccfbe20b9589df836b8b0fa34f4f8
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 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 DECLARE_MUTEX(idefloppy_ref_sem);
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 down(&idefloppy_ref_sem);
532 floppy = ide_floppy_g(disk);
533 if (floppy)
534 kref_get(&floppy->kref);
535 up(&idefloppy_ref_sem);
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 down(&idefloppy_ref_sem);
544 kref_put(&floppy->kref, ide_floppy_release);
545 up(&idefloppy_ref_sem);
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 (!(rq->flags & REQ_SPECIAL)) { //if (!IDEFLOPPY_RQ_CMD (rq->cmd)) {
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->flags = REQ_SPECIAL; //rq->cmd = IDEFLOPPY_PC_RQ;
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();
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 if (HWGROUP(drive)->handler != NULL)
901 BUG();
902 ide_set_handler(drive,
903 &idefloppy_pc_intr,
904 IDEFLOPPY_WAIT_CMD,
905 NULL);
906 return ide_started;
907 }
908 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
909 "send us more data than expected - "
910 "allowing transfer\n");
911 }
912 }
913 if (test_bit(PC_WRITING, &pc->flags)) {
914 if (pc->buffer != NULL)
915 /* Write the current buffer */
916 HWIF(drive)->atapi_output_bytes(drive,
917 pc->current_position,
918 bcount.all);
919 else
920 idefloppy_output_buffers(drive, pc, bcount.all);
921 } else {
922 if (pc->buffer != NULL)
923 /* Read the current buffer */
924 HWIF(drive)->atapi_input_bytes(drive,
925 pc->current_position,
926 bcount.all);
927 else
928 idefloppy_input_buffers(drive, pc, bcount.all);
929 }
930 /* Update the current position */
931 pc->actually_transferred += bcount.all;
932 pc->current_position += bcount.all;
933
934 if (HWGROUP(drive)->handler != NULL)
935 BUG();
936 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */
937 return ide_started;
938 }
939
940 /*
941 * This is the original routine that did the packet transfer.
942 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
943 * for that drive below. The algorithm is chosen based on drive type
944 */
945 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
946 {
947 ide_startstop_t startstop;
948 idefloppy_floppy_t *floppy = drive->driver_data;
949 atapi_ireason_t ireason;
950
951 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
952 printk(KERN_ERR "ide-floppy: Strange, packet command "
953 "initiated yet DRQ isn't asserted\n");
954 return startstop;
955 }
956 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
957 if (!ireason.b.cod || ireason.b.io) {
958 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
959 "issuing a packet command\n");
960 return ide_do_reset(drive);
961 }
962 if (HWGROUP(drive)->handler != NULL)
963 BUG();
964 /* Set the interrupt routine */
965 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
966 /* Send the actual packet */
967 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
968 return ide_started;
969 }
970
971
972 /*
973 * What we have here is a classic case of a top half / bottom half
974 * interrupt service routine. In interrupt mode, the device sends
975 * an interrupt to signal it's ready to receive a packet. However,
976 * we need to delay about 2-3 ticks before issuing the packet or we
977 * gets in trouble.
978 *
979 * So, follow carefully. transfer_pc1 is called as an interrupt (or
980 * directly). In either case, when the device says it's ready for a
981 * packet, we schedule the packet transfer to occur about 2-3 ticks
982 * later in transfer_pc2.
983 */
984 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
985 {
986 idefloppy_floppy_t *floppy = drive->driver_data;
987
988 /* Send the actual packet */
989 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
990 /* Timeout for the packet command */
991 return IDEFLOPPY_WAIT_CMD;
992 }
993
994 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
995 {
996 idefloppy_floppy_t *floppy = drive->driver_data;
997 ide_startstop_t startstop;
998 atapi_ireason_t ireason;
999
1000 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
1001 printk(KERN_ERR "ide-floppy: Strange, packet command "
1002 "initiated yet DRQ isn't asserted\n");
1003 return startstop;
1004 }
1005 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
1006 if (!ireason.b.cod || ireason.b.io) {
1007 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
1008 "while issuing a packet command\n");
1009 return ide_do_reset(drive);
1010 }
1011 /*
1012 * The following delay solves a problem with ATAPI Zip 100 drives
1013 * where the Busy flag was apparently being deasserted before the
1014 * unit was ready to receive data. This was happening on a
1015 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
1016 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
1017 * used until after the packet is moved in about 50 msec.
1018 */
1019 if (HWGROUP(drive)->handler != NULL)
1020 BUG();
1021 ide_set_handler(drive,
1022 &idefloppy_pc_intr, /* service routine for packet command */
1023 floppy->ticks, /* wait this long before "failing" */
1024 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */
1025 return ide_started;
1026 }
1027
1028 /**
1029 * idefloppy_should_report_error()
1030 *
1031 * Supresses error messages resulting from Medium not present
1032 */
1033 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1034 {
1035 if (floppy->sense_key == 0x02 &&
1036 floppy->asc == 0x3a &&
1037 floppy->ascq == 0x00)
1038 return 0;
1039 return 1;
1040 }
1041
1042 /*
1043 * Issue a packet command
1044 */
1045 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1046 {
1047 idefloppy_floppy_t *floppy = drive->driver_data;
1048 ide_hwif_t *hwif = drive->hwif;
1049 atapi_feature_t feature;
1050 atapi_bcount_t bcount;
1051 ide_handler_t *pkt_xfer_routine;
1052
1053 #if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone
1054 and have lived on another thread's stack; that stack may have become
1055 unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */
1056 #if IDEFLOPPY_DEBUG_BUGS
1057 if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD &&
1058 pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
1059 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - "
1060 "Two request sense in serial were issued\n");
1061 }
1062 #endif /* IDEFLOPPY_DEBUG_BUGS */
1063 #endif
1064
1065 if (floppy->failed_pc == NULL &&
1066 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1067 floppy->failed_pc = pc;
1068 /* Set the current packet command */
1069 floppy->pc = pc;
1070
1071 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1072 test_bit(PC_ABORT, &pc->flags)) {
1073 /*
1074 * We will "abort" retrying a packet command in case
1075 * a legitimate error code was received.
1076 */
1077 if (!test_bit(PC_ABORT, &pc->flags)) {
1078 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1079 if (idefloppy_should_report_error(floppy))
1080 printk(KERN_ERR "ide-floppy: %s: I/O error, "
1081 "pc = %2x, key = %2x, "
1082 "asc = %2x, ascq = %2x\n",
1083 drive->name, pc->c[0],
1084 floppy->sense_key,
1085 floppy->asc, floppy->ascq);
1086 }
1087 /* Giving up */
1088 pc->error = IDEFLOPPY_ERROR_GENERAL;
1089 }
1090 floppy->failed_pc = NULL;
1091 pc->callback(drive);
1092 return ide_stopped;
1093 }
1094
1095 debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1096
1097 pc->retries++;
1098 /* We haven't transferred any data yet */
1099 pc->actually_transferred = 0;
1100 pc->current_position = pc->buffer;
1101 bcount.all = min(pc->request_transfer, 63 * 1024);
1102
1103 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) {
1104 (void)__ide_dma_off(drive);
1105 }
1106 feature.all = 0;
1107
1108 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1109 feature.b.dma = !hwif->dma_setup(drive);
1110
1111 if (IDE_CONTROL_REG)
1112 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1113 /* Use PIO/DMA */
1114 HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
1115 HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
1116 HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
1117 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1118
1119 if (feature.b.dma) { /* Begin DMA, if necessary */
1120 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1121 hwif->dma_start(drive);
1122 }
1123
1124 /* Can we transfer the packet when we get the interrupt or wait? */
1125 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1126 /* wait */
1127 pkt_xfer_routine = &idefloppy_transfer_pc1;
1128 } else {
1129 /* immediate */
1130 pkt_xfer_routine = &idefloppy_transfer_pc;
1131 }
1132
1133 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1134 /* Issue the packet command */
1135 ide_execute_command(drive, WIN_PACKETCMD,
1136 pkt_xfer_routine,
1137 IDEFLOPPY_WAIT_CMD,
1138 NULL);
1139 return ide_started;
1140 } else {
1141 /* Issue the packet command */
1142 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1143 return (*pkt_xfer_routine) (drive);
1144 }
1145 }
1146
1147 static void idefloppy_rw_callback (ide_drive_t *drive)
1148 {
1149 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1150
1151 idefloppy_do_end_request(drive, 1, 0);
1152 return;
1153 }
1154
1155 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1156 {
1157 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1158 "prevent = %d\n", prevent);
1159
1160 idefloppy_init_pc(pc);
1161 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1162 pc->c[4] = prevent;
1163 }
1164
1165 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1166 {
1167 idefloppy_init_pc(pc);
1168 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1169 pc->c[7] = 255;
1170 pc->c[8] = 255;
1171 pc->request_transfer = 255;
1172 }
1173
1174 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1175 int flags)
1176 {
1177 idefloppy_init_pc(pc);
1178 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1179 pc->c[1] = 0x17;
1180
1181 memset(pc->buffer, 0, 12);
1182 pc->buffer[1] = 0xA2;
1183 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1184
1185 if (flags & 1) /* Verify bit on... */
1186 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */
1187 pc->buffer[3] = 8;
1188
1189 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1190 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1191 pc->buffer_size=12;
1192 set_bit(PC_WRITING, &pc->flags);
1193 }
1194
1195 /*
1196 * A mode sense command is used to "sense" floppy parameters.
1197 */
1198 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1199 {
1200 u16 length = sizeof(idefloppy_mode_parameter_header_t);
1201
1202 idefloppy_init_pc(pc);
1203 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1204 pc->c[1] = 0;
1205 pc->c[2] = page_code + (type << 6);
1206
1207 switch (page_code) {
1208 case IDEFLOPPY_CAPABILITIES_PAGE:
1209 length += 12;
1210 break;
1211 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1212 length += 32;
1213 break;
1214 default:
1215 printk(KERN_ERR "ide-floppy: unsupported page code "
1216 "in create_mode_sense_cmd\n");
1217 }
1218 put_unaligned(htons(length), (u16 *) &pc->c[7]);
1219 pc->request_transfer = length;
1220 }
1221
1222 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1223 {
1224 idefloppy_init_pc(pc);
1225 pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1226 pc->c[4] = start;
1227 }
1228
1229 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1230 {
1231 idefloppy_init_pc(pc);
1232 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1233 }
1234
1235 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1236 {
1237 int block = sector / floppy->bs_factor;
1238 int blocks = rq->nr_sectors / floppy->bs_factor;
1239 int cmd = rq_data_dir(rq);
1240
1241 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1242 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1243 block, blocks);
1244
1245 idefloppy_init_pc(pc);
1246 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1247 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1248 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1249 } else {
1250 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1251 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1252 }
1253 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1254 pc->callback = &idefloppy_rw_callback;
1255 pc->rq = rq;
1256 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1257 if (rq->flags & REQ_RW)
1258 set_bit(PC_WRITING, &pc->flags);
1259 pc->buffer = NULL;
1260 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1261 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1262 }
1263
1264 static int
1265 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1266 {
1267 /*
1268 * just support eject for now, it would not be hard to make the
1269 * REQ_BLOCK_PC support fully-featured
1270 */
1271 if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD)
1272 return 1;
1273
1274 idefloppy_init_pc(pc);
1275 memcpy(pc->c, rq->cmd, sizeof(pc->c));
1276 return 0;
1277 }
1278
1279 /*
1280 * idefloppy_do_request is our request handling function.
1281 */
1282 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1283 {
1284 idefloppy_floppy_t *floppy = drive->driver_data;
1285 idefloppy_pc_t *pc;
1286 unsigned long block = (unsigned long)block_s;
1287
1288 debug_log(KERN_INFO "rq_status: %d, dev: %s, flags: %lx, errors: %d\n",
1289 rq->rq_status,
1290 rq->rq_disk ? rq->rq_disk->disk_name ? "?",
1291 rq->flags, rq->errors);
1292 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1293 "current_nr_sectors: %d\n", (long)rq->sector,
1294 rq->nr_sectors, rq->current_nr_sectors);
1295
1296 if (rq->errors >= ERROR_MAX) {
1297 if (floppy->failed_pc != NULL) {
1298 if (idefloppy_should_report_error(floppy))
1299 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1300 " key = %2x, asc = %2x, ascq = %2x\n",
1301 drive->name, floppy->failed_pc->c[0],
1302 floppy->sense_key, floppy->asc, floppy->ascq);
1303 }
1304 else
1305 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1306 drive->name);
1307 idefloppy_do_end_request(drive, 0, 0);
1308 return ide_stopped;
1309 }
1310 if (rq->flags & REQ_CMD) {
1311 if (((long)rq->sector % floppy->bs_factor) ||
1312 (rq->nr_sectors % floppy->bs_factor)) {
1313 printk("%s: unsupported r/w request size\n",
1314 drive->name);
1315 idefloppy_do_end_request(drive, 0, 0);
1316 return ide_stopped;
1317 }
1318 pc = idefloppy_next_pc_storage(drive);
1319 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1320 } else if (rq->flags & REQ_SPECIAL) {
1321 pc = (idefloppy_pc_t *) rq->buffer;
1322 } else if (rq->flags & REQ_BLOCK_PC) {
1323 pc = idefloppy_next_pc_storage(drive);
1324 if (idefloppy_blockpc_cmd(floppy, pc, rq)) {
1325 idefloppy_do_end_request(drive, 0, 0);
1326 return ide_stopped;
1327 }
1328 } else {
1329 blk_dump_rq_flags(rq,
1330 "ide-floppy: unsupported command in queue");
1331 idefloppy_do_end_request(drive, 0, 0);
1332 return ide_stopped;
1333 }
1334
1335 pc->rq = rq;
1336 return idefloppy_issue_pc(drive, pc);
1337 }
1338
1339 /*
1340 * idefloppy_queue_pc_tail adds a special packet command request to the
1341 * tail of the request queue, and waits for it to be serviced.
1342 */
1343 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1344 {
1345 struct ide_floppy_obj *floppy = drive->driver_data;
1346 struct request rq;
1347
1348 ide_init_drive_cmd (&rq);
1349 rq.buffer = (char *) pc;
1350 rq.flags = REQ_SPECIAL; // rq.cmd = IDEFLOPPY_PC_RQ;
1351 rq.rq_disk = floppy->disk;
1352
1353 return ide_do_drive_cmd(drive, &rq, ide_wait);
1354 }
1355
1356 /*
1357 * Look at the flexible disk page parameters. We will ignore the CHS
1358 * capacity parameters and use the LBA parameters instead.
1359 */
1360 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1361 {
1362 idefloppy_floppy_t *floppy = drive->driver_data;
1363 idefloppy_pc_t pc;
1364 idefloppy_mode_parameter_header_t *header;
1365 idefloppy_flexible_disk_page_t *page;
1366 int capacity, lba_capacity;
1367
1368 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1369 if (idefloppy_queue_pc_tail(drive,&pc)) {
1370 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1371 "page parameters\n");
1372 return 1;
1373 }
1374 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1375 floppy->wp = header->wp;
1376 set_disk_ro(floppy->disk, floppy->wp);
1377 page = (idefloppy_flexible_disk_page_t *) (header + 1);
1378
1379 page->transfer_rate = ntohs(page->transfer_rate);
1380 page->sector_size = ntohs(page->sector_size);
1381 page->cyls = ntohs(page->cyls);
1382 page->rpm = ntohs(page->rpm);
1383 capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1384 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1385 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1386 "%d sector size, %d rpm\n",
1387 drive->name, capacity / 1024, page->cyls,
1388 page->heads, page->sectors,
1389 page->transfer_rate / 8, page->sector_size, page->rpm);
1390
1391 floppy->flexible_disk_page = *page;
1392 drive->bios_cyl = page->cyls;
1393 drive->bios_head = page->heads;
1394 drive->bios_sect = page->sectors;
1395 lba_capacity = floppy->blocks * floppy->block_size;
1396 if (capacity < lba_capacity) {
1397 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1398 "bytes, but the drive only handles %d\n",
1399 drive->name, lba_capacity, capacity);
1400 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1401 }
1402 return 0;
1403 }
1404
1405 static int idefloppy_get_capability_page(ide_drive_t *drive)
1406 {
1407 idefloppy_floppy_t *floppy = drive->driver_data;
1408 idefloppy_pc_t pc;
1409 idefloppy_mode_parameter_header_t *header;
1410 idefloppy_capabilities_page_t *page;
1411
1412 floppy->srfp = 0;
1413 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1414 MODE_SENSE_CURRENT);
1415
1416 set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1417 if (idefloppy_queue_pc_tail(drive,&pc)) {
1418 return 1;
1419 }
1420
1421 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1422 page= (idefloppy_capabilities_page_t *)(header+1);
1423 floppy->srfp = page->srfp;
1424 return (0);
1425 }
1426
1427 /*
1428 * Determine if a media is present in the floppy drive, and if so,
1429 * its LBA capacity.
1430 */
1431 static int idefloppy_get_capacity (ide_drive_t *drive)
1432 {
1433 idefloppy_floppy_t *floppy = drive->driver_data;
1434 idefloppy_pc_t pc;
1435 idefloppy_capacity_header_t *header;
1436 idefloppy_capacity_descriptor_t *descriptor;
1437 int i, descriptors, rc = 1, blocks, length;
1438
1439 drive->bios_cyl = 0;
1440 drive->bios_head = drive->bios_sect = 0;
1441 floppy->blocks = floppy->bs_factor = 0;
1442 set_capacity(floppy->disk, 0);
1443
1444 idefloppy_create_read_capacity_cmd(&pc);
1445 if (idefloppy_queue_pc_tail(drive, &pc)) {
1446 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1447 return 1;
1448 }
1449 header = (idefloppy_capacity_header_t *) pc.buffer;
1450 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1451 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1452
1453 for (i = 0; i < descriptors; i++, descriptor++) {
1454 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1455 length = descriptor->length = ntohs(descriptor->length);
1456
1457 if (!i)
1458 {
1459 switch (descriptor->dc) {
1460 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1461 case CAPACITY_UNFORMATTED:
1462 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1463 /*
1464 * If it is not a clik drive, break out
1465 * (maintains previous driver behaviour)
1466 */
1467 break;
1468 case CAPACITY_CURRENT:
1469 /* Normal Zip/LS-120 disks */
1470 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1471 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1472 "sector size\n", drive->name,
1473 blocks * length / 1024, blocks, length);
1474 floppy->capacity = *descriptor;
1475 if (!length || length % 512) {
1476 printk(KERN_NOTICE "%s: %d bytes block size "
1477 "not supported\n", drive->name, length);
1478 } else {
1479 floppy->blocks = blocks;
1480 floppy->block_size = length;
1481 if ((floppy->bs_factor = length / 512) != 1)
1482 printk(KERN_NOTICE "%s: warning: non "
1483 "512 bytes block size not "
1484 "fully supported\n",
1485 drive->name);
1486 rc = 0;
1487 }
1488 break;
1489 case CAPACITY_NO_CARTRIDGE:
1490 /*
1491 * This is a KERN_ERR so it appears on screen
1492 * for the user to see
1493 */
1494 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1495 break;
1496 case CAPACITY_INVALID:
1497 printk(KERN_ERR "%s: Invalid capacity for disk "
1498 "in drive\n", drive->name);
1499 break;
1500 }
1501 }
1502 if (!i) {
1503 debug_log( "Descriptor 0 Code: %d\n",
1504 descriptor->dc);
1505 }
1506 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1507 "sector size\n", i, blocks * length / 1024, blocks,
1508 length);
1509 }
1510
1511 /* Clik! disk does not support get_flexible_disk_page */
1512 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1513 (void) idefloppy_get_flexible_disk_page(drive);
1514 }
1515
1516 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1517 return rc;
1518 }
1519
1520 /*
1521 ** Obtain the list of formattable capacities.
1522 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1523 ** descriptors to userland, instead of our own structures.
1524 **
1525 ** Userland gives us the following structure:
1526 **
1527 ** struct idefloppy_format_capacities {
1528 ** int nformats;
1529 ** struct {
1530 ** int nblocks;
1531 ** int blocksize;
1532 ** } formats[];
1533 ** } ;
1534 **
1535 ** userland initializes nformats to the number of allocated formats[]
1536 ** records. On exit we set nformats to the number of records we've
1537 ** actually initialized.
1538 **
1539 */
1540
1541 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1542 {
1543 idefloppy_pc_t pc;
1544 idefloppy_capacity_header_t *header;
1545 idefloppy_capacity_descriptor_t *descriptor;
1546 int i, descriptors, blocks, length;
1547 int u_array_size;
1548 int u_index;
1549 int __user *argp;
1550
1551 if (get_user(u_array_size, arg))
1552 return (-EFAULT);
1553
1554 if (u_array_size <= 0)
1555 return (-EINVAL);
1556
1557 idefloppy_create_read_capacity_cmd(&pc);
1558 if (idefloppy_queue_pc_tail(drive, &pc)) {
1559 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1560 return (-EIO);
1561 }
1562 header = (idefloppy_capacity_header_t *) pc.buffer;
1563 descriptors = header->length /
1564 sizeof(idefloppy_capacity_descriptor_t);
1565 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1566
1567 u_index = 0;
1568 argp = arg + 1;
1569
1570 /*
1571 ** We always skip the first capacity descriptor. That's the
1572 ** current capacity. We are interested in the remaining descriptors,
1573 ** the formattable capacities.
1574 */
1575
1576 for (i=0; i<descriptors; i++, descriptor++) {
1577 if (u_index >= u_array_size)
1578 break; /* User-supplied buffer too small */
1579 if (i == 0)
1580 continue; /* Skip the first descriptor */
1581
1582 blocks = ntohl(descriptor->blocks);
1583 length = ntohs(descriptor->length);
1584
1585 if (put_user(blocks, argp))
1586 return(-EFAULT);
1587 ++argp;
1588
1589 if (put_user(length, argp))
1590 return (-EFAULT);
1591 ++argp;
1592
1593 ++u_index;
1594 }
1595
1596 if (put_user(u_index, arg))
1597 return (-EFAULT);
1598 return (0);
1599 }
1600
1601 /*
1602 ** Send ATAPI_FORMAT_UNIT to the drive.
1603 **
1604 ** Userland gives us the following structure:
1605 **
1606 ** struct idefloppy_format_command {
1607 ** int nblocks;
1608 ** int blocksize;
1609 ** int flags;
1610 ** } ;
1611 **
1612 ** flags is a bitmask, currently, the only defined flag is:
1613 **
1614 ** 0x01 - verify media after format.
1615 */
1616
1617 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1618 {
1619 int blocks;
1620 int length;
1621 int flags;
1622 idefloppy_pc_t pc;
1623
1624 if (get_user(blocks, arg) ||
1625 get_user(length, arg+1) ||
1626 get_user(flags, arg+2)) {
1627 return (-EFAULT);
1628 }
1629
1630 /* Get the SFRP bit */
1631 (void) idefloppy_get_capability_page(drive);
1632 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1633 if (idefloppy_queue_pc_tail(drive, &pc)) {
1634 return (-EIO);
1635 }
1636
1637 return (0);
1638 }
1639
1640 /*
1641 ** Get ATAPI_FORMAT_UNIT progress indication.
1642 **
1643 ** Userland gives a pointer to an int. The int is set to a progresss
1644 ** indicator 0-65536, with 65536=100%.
1645 **
1646 ** If the drive does not support format progress indication, we just check
1647 ** the dsc bit, and return either 0 or 65536.
1648 */
1649
1650 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1651 {
1652 idefloppy_floppy_t *floppy = drive->driver_data;
1653 idefloppy_pc_t pc;
1654 int progress_indication = 0x10000;
1655
1656 if (floppy->srfp) {
1657 idefloppy_create_request_sense_cmd(&pc);
1658 if (idefloppy_queue_pc_tail(drive, &pc)) {
1659 return (-EIO);
1660 }
1661
1662 if (floppy->sense_key == 2 &&
1663 floppy->asc == 4 &&
1664 floppy->ascq == 4) {
1665 progress_indication = floppy->progress_indication;
1666 }
1667 /* Else assume format_unit has finished, and we're
1668 ** at 0x10000 */
1669 } else {
1670 atapi_status_t status;
1671 unsigned long flags;
1672
1673 local_irq_save(flags);
1674 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
1675 local_irq_restore(flags);
1676
1677 progress_indication = !status.b.dsc ? 0 : 0x10000;
1678 }
1679 if (put_user(progress_indication, arg))
1680 return (-EFAULT);
1681
1682 return (0);
1683 }
1684
1685 /*
1686 * Return the current floppy capacity.
1687 */
1688 static sector_t idefloppy_capacity (ide_drive_t *drive)
1689 {
1690 idefloppy_floppy_t *floppy = drive->driver_data;
1691 unsigned long capacity = floppy->blocks * floppy->bs_factor;
1692
1693 return capacity;
1694 }
1695
1696 /*
1697 * idefloppy_identify_device checks if we can support a drive,
1698 * based on the ATAPI IDENTIFY command results.
1699 */
1700 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1701 {
1702 struct idefloppy_id_gcw gcw;
1703 #if IDEFLOPPY_DEBUG_INFO
1704 u16 mask,i;
1705 char buffer[80];
1706 #endif /* IDEFLOPPY_DEBUG_INFO */
1707
1708 *((u16 *) &gcw) = id->config;
1709
1710 #ifdef CONFIG_PPC
1711 /* kludge for Apple PowerBook internal zip */
1712 if ((gcw.device_type == 5) &&
1713 !strstr(id->model, "CD-ROM") &&
1714 strstr(id->model, "ZIP"))
1715 gcw.device_type = 0;
1716 #endif
1717
1718 #if IDEFLOPPY_DEBUG_INFO
1719 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1720 switch (gcw.protocol) {
1721 case 0: case 1: sprintf(buffer, "ATA");break;
1722 case 2: sprintf(buffer, "ATAPI");break;
1723 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1724 }
1725 printk(KERN_INFO "Protocol Type: %s\n", buffer);
1726 switch (gcw.device_type) {
1727 case 0: sprintf(buffer, "Direct-access Device");break;
1728 case 1: sprintf(buffer, "Streaming Tape Device");break;
1729 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1730 case 5: sprintf(buffer, "CD-ROM Device");break;
1731 case 6: sprintf(buffer, "Reserved");
1732 case 7: sprintf(buffer, "Optical memory Device");break;
1733 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1734 default: sprintf(buffer, "Reserved");
1735 }
1736 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1737 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1738 switch (gcw.drq_type) {
1739 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1740 case 1: sprintf(buffer, "Interrupt DRQ");break;
1741 case 2: sprintf(buffer, "Accelerated DRQ");break;
1742 case 3: sprintf(buffer, "Reserved");break;
1743 }
1744 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1745 switch (gcw.packet_size) {
1746 case 0: sprintf(buffer, "12 bytes");break;
1747 case 1: sprintf(buffer, "16 bytes");break;
1748 default: sprintf(buffer, "Reserved");break;
1749 }
1750 printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1751 printk(KERN_INFO "Model: %.40s\n",id->model);
1752 printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1753 printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1754 printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1755 printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1756 printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1757 printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1758 printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1759 printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1760 printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1761 printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1762 printk(KERN_INFO "Single Word DMA supported modes:\n");
1763 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1764 if (id->dma_1word & mask)
1765 printk(KERN_INFO " Mode %d%s\n", i,
1766 (id->dma_1word & (mask << 8)) ? " (active)" : "");
1767 }
1768 printk(KERN_INFO "Multi Word DMA supported modes:\n");
1769 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1770 if (id->dma_mword & mask)
1771 printk(KERN_INFO " Mode %d%s\n", i,
1772 (id->dma_mword & (mask << 8)) ? " (active)" : "");
1773 }
1774 if (id->field_valid & 0x0002) {
1775 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1776 id->eide_pio_modes & 1 ? "Mode 3":"None");
1777 if (id->eide_dma_min == 0)
1778 sprintf(buffer, "Not supported");
1779 else
1780 sprintf(buffer, "%d ns",id->eide_dma_min);
1781 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1782 if (id->eide_dma_time == 0)
1783 sprintf(buffer, "Not supported");
1784 else
1785 sprintf(buffer, "%d ns",id->eide_dma_time);
1786 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1787 if (id->eide_pio == 0)
1788 sprintf(buffer, "Not supported");
1789 else
1790 sprintf(buffer, "%d ns",id->eide_pio);
1791 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1792 buffer);
1793 if (id->eide_pio_iordy == 0)
1794 sprintf(buffer, "Not supported");
1795 else
1796 sprintf(buffer, "%d ns",id->eide_pio_iordy);
1797 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1798 } else
1799 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1800 #endif /* IDEFLOPPY_DEBUG_INFO */
1801
1802 if (gcw.protocol != 2)
1803 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1804 else if (gcw.device_type != 0)
1805 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1806 else if (!gcw.removable)
1807 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1808 else if (gcw.drq_type == 3) {
1809 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1810 } else if (gcw.packet_size != 0) {
1811 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1812 } else
1813 return 1;
1814 return 0;
1815 }
1816
1817 static void idefloppy_add_settings(ide_drive_t *drive)
1818 {
1819 idefloppy_floppy_t *floppy = drive->driver_data;
1820
1821 /*
1822 * drive setting name read/write ioctl ioctl data type min max mul_factor div_factor data pointer set function
1823 */
1824 ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
1825 ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
1826 ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
1827 ide_add_setting(drive, "ticks", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL);
1828 }
1829
1830 /*
1831 * Driver initialization.
1832 */
1833 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1834 {
1835 struct idefloppy_id_gcw gcw;
1836
1837 *((u16 *) &gcw) = drive->id->config;
1838 floppy->pc = floppy->pc_stack;
1839 if (gcw.drq_type == 1)
1840 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1841 /*
1842 * We used to check revisions here. At this point however
1843 * I'm giving up. Just assume they are all broken, its easier.
1844 *
1845 * The actual reason for the workarounds was likely
1846 * a driver bug after all rather than a firmware bug,
1847 * and the workaround below used to hide it. It should
1848 * be fixed as of version 1.9, but to be on the safe side
1849 * we'll leave the limitation below for the 2.2.x tree.
1850 */
1851
1852 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1853 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1854 /* This value will be visible in the /proc/ide/hdx/settings */
1855 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1856 blk_queue_max_sectors(drive->queue, 64);
1857 }
1858
1859 /*
1860 * Guess what? The IOMEGA Clik! drive also needs the
1861 * above fix. It makes nasty clicking noises without
1862 * it, so please don't remove this.
1863 */
1864 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1865 blk_queue_max_sectors(drive->queue, 64);
1866 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1867 }
1868
1869
1870 (void) idefloppy_get_capacity(drive);
1871 idefloppy_add_settings(drive);
1872 }
1873
1874 static int ide_floppy_remove(struct device *dev)
1875 {
1876 ide_drive_t *drive = to_ide_device(dev);
1877 idefloppy_floppy_t *floppy = drive->driver_data;
1878 struct gendisk *g = floppy->disk;
1879
1880 ide_unregister_subdriver(drive, floppy->driver);
1881
1882 del_gendisk(g);
1883
1884 ide_floppy_put(floppy);
1885
1886 return 0;
1887 }
1888
1889 static void ide_floppy_release(struct kref *kref)
1890 {
1891 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1892 ide_drive_t *drive = floppy->drive;
1893 struct gendisk *g = floppy->disk;
1894
1895 drive->driver_data = NULL;
1896 g->private_data = NULL;
1897 put_disk(g);
1898 kfree(floppy);
1899 }
1900
1901 #ifdef CONFIG_PROC_FS
1902
1903 static int proc_idefloppy_read_capacity
1904 (char *page, char **start, off_t off, int count, int *eof, void *data)
1905 {
1906 ide_drive_t*drive = (ide_drive_t *)data;
1907 int len;
1908
1909 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1910 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1911 }
1912
1913 static ide_proc_entry_t idefloppy_proc[] = {
1914 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
1915 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
1916 { NULL, 0, NULL, NULL }
1917 };
1918
1919 #else
1920
1921 #define idefloppy_proc NULL
1922
1923 #endif /* CONFIG_PROC_FS */
1924
1925 static int ide_floppy_probe(struct device *);
1926
1927 static ide_driver_t idefloppy_driver = {
1928 .gen_driver = {
1929 .owner = THIS_MODULE,
1930 .name = "ide-floppy",
1931 .bus = &ide_bus_type,
1932 .probe = ide_floppy_probe,
1933 .remove = ide_floppy_remove,
1934 },
1935 .version = IDEFLOPPY_VERSION,
1936 .media = ide_floppy,
1937 .supports_dsc_overlap = 0,
1938 .do_request = idefloppy_do_request,
1939 .end_request = idefloppy_do_end_request,
1940 .error = __ide_error,
1941 .abort = __ide_abort,
1942 .proc = idefloppy_proc,
1943 };
1944
1945 static int idefloppy_open(struct inode *inode, struct file *filp)
1946 {
1947 struct gendisk *disk = inode->i_bdev->bd_disk;
1948 struct ide_floppy_obj *floppy;
1949 ide_drive_t *drive;
1950 idefloppy_pc_t pc;
1951 int ret = 0;
1952
1953 debug_log(KERN_INFO "Reached idefloppy_open\n");
1954
1955 if (!(floppy = ide_floppy_get(disk)))
1956 return -ENXIO;
1957
1958 drive = floppy->drive;
1959
1960 drive->usage++;
1961
1962 if (drive->usage == 1) {
1963 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1964 /* Just in case */
1965
1966 idefloppy_create_test_unit_ready_cmd(&pc);
1967 if (idefloppy_queue_pc_tail(drive, &pc)) {
1968 idefloppy_create_start_stop_cmd(&pc, 1);
1969 (void) idefloppy_queue_pc_tail(drive, &pc);
1970 }
1971
1972 if (idefloppy_get_capacity (drive)
1973 && (filp->f_flags & O_NDELAY) == 0
1974 /*
1975 ** Allow O_NDELAY to open a drive without a disk, or with
1976 ** an unreadable disk, so that we can get the format
1977 ** capacity of the drive or begin the format - Sam
1978 */
1979 ) {
1980 drive->usage--;
1981 ret = -EIO;
1982 goto out_put_floppy;
1983 }
1984
1985 if (floppy->wp && (filp->f_mode & 2)) {
1986 drive->usage--;
1987 ret = -EROFS;
1988 goto out_put_floppy;
1989 }
1990 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1991 /* IOMEGA Clik! drives do not support lock/unlock commands */
1992 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1993 idefloppy_create_prevent_cmd(&pc, 1);
1994 (void) idefloppy_queue_pc_tail(drive, &pc);
1995 }
1996 check_disk_change(inode->i_bdev);
1997 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1998 drive->usage--;
1999 ret = -EBUSY;
2000 goto out_put_floppy;
2001 }
2002 return 0;
2003
2004 out_put_floppy:
2005 ide_floppy_put(floppy);
2006 return ret;
2007 }
2008
2009 static int idefloppy_release(struct inode *inode, struct file *filp)
2010 {
2011 struct gendisk *disk = inode->i_bdev->bd_disk;
2012 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2013 ide_drive_t *drive = floppy->drive;
2014 idefloppy_pc_t pc;
2015
2016 debug_log(KERN_INFO "Reached idefloppy_release\n");
2017
2018 if (drive->usage == 1) {
2019 /* IOMEGA Clik! drives do not support lock/unlock commands */
2020 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2021 idefloppy_create_prevent_cmd(&pc, 0);
2022 (void) idefloppy_queue_pc_tail(drive, &pc);
2023 }
2024
2025 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2026 }
2027 drive->usage--;
2028
2029 ide_floppy_put(floppy);
2030
2031 return 0;
2032 }
2033
2034 static int idefloppy_ioctl(struct inode *inode, struct file *file,
2035 unsigned int cmd, unsigned long arg)
2036 {
2037 struct block_device *bdev = inode->i_bdev;
2038 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2039 ide_drive_t *drive = floppy->drive;
2040 void __user *argp = (void __user *)arg;
2041 int err;
2042 int prevent = (arg) ? 1 : 0;
2043 idefloppy_pc_t pc;
2044
2045 switch (cmd) {
2046 case CDROMEJECT:
2047 prevent = 0;
2048 /* fall through */
2049 case CDROM_LOCKDOOR:
2050 if (drive->usage > 1)
2051 return -EBUSY;
2052
2053 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2054 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2055 idefloppy_create_prevent_cmd(&pc, prevent);
2056 (void) idefloppy_queue_pc_tail(drive, &pc);
2057 }
2058 if (cmd == CDROMEJECT) {
2059 idefloppy_create_start_stop_cmd(&pc, 2);
2060 (void) idefloppy_queue_pc_tail(drive, &pc);
2061 }
2062 return 0;
2063 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2064 return 0;
2065 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2066 return idefloppy_get_format_capacities(drive, argp);
2067 case IDEFLOPPY_IOCTL_FORMAT_START:
2068
2069 if (!(file->f_mode & 2))
2070 return -EPERM;
2071
2072 if (drive->usage > 1) {
2073 /* Don't format if someone is using the disk */
2074
2075 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2076 &floppy->flags);
2077 return -EBUSY;
2078 }
2079
2080 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2081
2082 err = idefloppy_begin_format(drive, argp);
2083 if (err)
2084 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2085 return err;
2086 /*
2087 ** Note, the bit will be cleared when the device is
2088 ** closed. This is the cleanest way to handle the
2089 ** situation where the drive does not support
2090 ** format progress reporting.
2091 */
2092 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2093 return idefloppy_get_format_progress(drive, argp);
2094 }
2095 return generic_ide_ioctl(drive, file, bdev, cmd, arg);
2096 }
2097
2098 static int idefloppy_media_changed(struct gendisk *disk)
2099 {
2100 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2101 ide_drive_t *drive = floppy->drive;
2102
2103 /* do not scan partitions twice if this is a removable device */
2104 if (drive->attach) {
2105 drive->attach = 0;
2106 return 0;
2107 }
2108 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2109 }
2110
2111 static int idefloppy_revalidate_disk(struct gendisk *disk)
2112 {
2113 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2114 set_capacity(disk, idefloppy_capacity(floppy->drive));
2115 return 0;
2116 }
2117
2118 static struct block_device_operations idefloppy_ops = {
2119 .owner = THIS_MODULE,
2120 .open = idefloppy_open,
2121 .release = idefloppy_release,
2122 .ioctl = idefloppy_ioctl,
2123 .media_changed = idefloppy_media_changed,
2124 .revalidate_disk= idefloppy_revalidate_disk
2125 };
2126
2127 static int ide_floppy_probe(struct device *dev)
2128 {
2129 ide_drive_t *drive = to_ide_device(dev);
2130 idefloppy_floppy_t *floppy;
2131 struct gendisk *g;
2132
2133 if (!strstr("ide-floppy", drive->driver_req))
2134 goto failed;
2135 if (!drive->present)
2136 goto failed;
2137 if (drive->media != ide_floppy)
2138 goto failed;
2139 if (!idefloppy_identify_device (drive, drive->id)) {
2140 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2141 goto failed;
2142 }
2143 if (drive->scsi) {
2144 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2145 goto failed;
2146 }
2147 if ((floppy = (idefloppy_floppy_t *) kzalloc (sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2148 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2149 goto failed;
2150 }
2151
2152 g = alloc_disk(1 << PARTN_BITS);
2153 if (!g)
2154 goto out_free_floppy;
2155
2156 ide_init_disk(g, drive);
2157
2158 ide_register_subdriver(drive, &idefloppy_driver);
2159
2160 kref_init(&floppy->kref);
2161
2162 floppy->drive = drive;
2163 floppy->driver = &idefloppy_driver;
2164 floppy->disk = g;
2165
2166 g->private_data = &floppy->driver;
2167
2168 drive->driver_data = floppy;
2169
2170 idefloppy_setup (drive, floppy);
2171
2172 g->minors = 1 << PARTN_BITS;
2173 g->driverfs_dev = &drive->gendev;
2174 strcpy(g->devfs_name, drive->devfs_name);
2175 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2176 g->fops = &idefloppy_ops;
2177 drive->attach = 1;
2178 add_disk(g);
2179 return 0;
2180
2181 out_free_floppy:
2182 kfree(floppy);
2183 failed:
2184 return -ENODEV;
2185 }
2186
2187 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2188
2189 static void __exit idefloppy_exit (void)
2190 {
2191 driver_unregister(&idefloppy_driver.gen_driver);
2192 }
2193
2194 static int __init idefloppy_init(void)
2195 {
2196 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2197 return driver_register(&idefloppy_driver.gen_driver);
2198 }
2199
2200 module_init(idefloppy_init);
2201 module_exit(idefloppy_exit);
2202 MODULE_LICENSE("GPL");