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IRQ: add __must_check to request_irq
[linux-2.6/openmoko-kernel.git] / drivers / ide / ide-floppy.c
blob57cd21c5b2c1f0c0fdc7a79985f226f736a0da00
1 /*
2 * linux/drivers/ide/ide-floppy.c Version 0.99 Feb 24 2002
3 *
4 * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il>
5 * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net>
6 */
7
8 /*
9 * IDE ATAPI floppy driver.
10 *
11 * The driver currently doesn't have any fancy features, just the bare
12 * minimum read/write support.
13 *
14 * This driver supports the following IDE floppy drives:
15 *
16 * LS-120/240 SuperDisk
17 * Iomega Zip 100/250
18 * Iomega PC Card Clik!/PocketZip
19 *
20 * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many
21 * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive.
22 *
23 * Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c.
24 * Ver 0.2 Oct 31 96 Minor changes.
25 * Ver 0.3 Dec 2 96 Fixed error recovery bug.
26 * Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl.
27 * Ver 0.5 Feb 21 97 Add partitions support.
28 * Use the minimum of the LBA and CHS capacities.
29 * Avoid hwgroup->rq == NULL on the last irq.
30 * Fix potential null dereferencing with DEBUG_LOG.
31 * Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds.
32 * Add media write-protect detection.
33 * Issue START command only if TEST UNIT READY fails.
34 * Add work-around for IOMEGA ZIP revision 21.D.
35 * Remove idefloppy_get_capabilities().
36 * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of
37 * bytes requested on each interrupt to be zero.
38 * Thanks to <shanos@es.co.nz> for pointing this out.
39 * Ver 0.9.sv Jan 6 01 Sam Varshavchik <mrsam@courier-mta.com>
40 * Implement low level formatting. Reimplemented
41 * IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp
42 * bit. My LS-120 drive barfs on
43 * IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me.
44 * Compromise by not reporting a failure to get this
45 * mode page. Implemented four IOCTLs in order to
46 * implement formatting. IOCTls begin with 0x4600,
47 * 0x46 is 'F' as in Format.
48 * Jan 9 01 Userland option to select format verify.
49 * Added PC_SUPPRESS_ERROR flag - some idefloppy drives
50 * do not implement IDEFLOPPY_CAPABILITIES_PAGE, and
51 * return a sense error. Suppress error reporting in
52 * this particular case in order to avoid spurious
53 * errors in syslog. The culprit is
54 * idefloppy_get_capability_page(), so move it to
55 * idefloppy_begin_format() so that it's not used
56 * unless absolutely necessary.
57 * If drive does not support format progress indication
58 * monitor the dsc bit in the status register.
59 * Also, O_NDELAY on open will allow the device to be
60 * opened without a disk available. This can be used to
61 * open an unformatted disk, or get the device capacity.
62 * Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by
63 * <paul@paulbristow.net>
64 * Ver 0.92 Oct 22 00 Paul Bristow became official maintainer for this
65 * driver. Included Powerbook internal zip kludge.
66 * Ver 0.93 Oct 24 00 Fixed bugs for Clik! drive
67 * no disk on insert and disk change now works
68 * Ver 0.94 Oct 27 00 Tidied up to remove strstr(Clik) everywhere
69 * Ver 0.95 Nov 7 00 Brought across to kernel 2.4
70 * Ver 0.96 Jan 7 01 Actually in line with release version of 2.4.0
71 * including set_bit patch from Rusty Russell
72 * Ver 0.97 Jul 22 01 Merge 0.91-0.96 onto 0.9.sv for ac series
73 * Ver 0.97.sv Aug 3 01 Backported from 2.4.7-ac3
74 * Ver 0.98 Oct 26 01 Split idefloppy_transfer_pc into two pieces to
75 * fix a lost interrupt problem. It appears the busy
76 * bit was being deasserted by my IOMEGA ATAPI ZIP 100
77 * drive before the drive was actually ready.
78 * Ver 0.98a Oct 29 01 Expose delay value so we can play.
79 * Ver 0.99 Feb 24 02 Remove duplicate code, modify clik! detection code
80 * to support new PocketZip drives
81 */
82
83 #define IDEFLOPPY_VERSION "0.99.newide"
84
85 #include <linux/module.h>
86 #include <linux/types.h>
87 #include <linux/string.h>
88 #include <linux/kernel.h>
89 #include <linux/delay.h>
90 #include <linux/timer.h>
91 #include <linux/mm.h>
92 #include <linux/interrupt.h>
93 #include <linux/major.h>
94 #include <linux/errno.h>
95 #include <linux/genhd.h>
96 #include <linux/slab.h>
97 #include <linux/cdrom.h>
98 #include <linux/ide.h>
99 #include <linux/bitops.h>
100 #include <linux/mutex.h>
101
102 #include <asm/byteorder.h>
103 #include <asm/irq.h>
104 #include <asm/uaccess.h>
105 #include <asm/io.h>
106 #include <asm/unaligned.h>
107
108 /*
109 * The following are used to debug the driver.
110 */
111 #define IDEFLOPPY_DEBUG_LOG 0
112 #define IDEFLOPPY_DEBUG_INFO 0
113 #define IDEFLOPPY_DEBUG_BUGS 1
114
115 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
116 #define IDEFLOPPY_DEBUG( fmt, args... )
117
118 #if IDEFLOPPY_DEBUG_LOG
119 #define debug_log printk
120 #else
121 #define debug_log(fmt, args... ) do {} while(0)
122 #endif
123
124
125 /*
126 * Some drives require a longer irq timeout.
127 */
128 #define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
129
130 /*
131 * After each failed packet command we issue a request sense command
132 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
133 */
134 #define IDEFLOPPY_MAX_PC_RETRIES 3
135
136 /*
137 * With each packet command, we allocate a buffer of
138 * IDEFLOPPY_PC_BUFFER_SIZE bytes.
139 */
140 #define IDEFLOPPY_PC_BUFFER_SIZE 256
141
142 /*
143 * In various places in the driver, we need to allocate storage
144 * for packet commands and requests, which will remain valid while
145 * we leave the driver to wait for an interrupt or a timeout event.
146 */
147 #define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
148
149 /*
150 * Our view of a packet command.
151 */
152 typedef struct idefloppy_packet_command_s {
153 u8 c[12]; /* Actual packet bytes */
154 int retries; /* On each retry, we increment retries */
155 int error; /* Error code */
156 int request_transfer; /* Bytes to transfer */
157 int actually_transferred; /* Bytes actually transferred */
158 int buffer_size; /* Size of our data buffer */
159 int b_count; /* Missing/Available data on the current buffer */
160 struct request *rq; /* The corresponding request */
161 u8 *buffer; /* Data buffer */
162 u8 *current_position; /* Pointer into the above buffer */
163 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */
164 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
165 unsigned long flags; /* Status/Action bit flags: long for set_bit */
166 } idefloppy_pc_t;
167
168 /*
169 * Packet command flag bits.
170 */
171 #define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */
172 #define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */
173 #define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */
174 #define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */
175 #define PC_WRITING 5 /* Data direction */
176
177 #define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */
178
179 /*
180 * Removable Block Access Capabilities Page
181 */
182 typedef struct {
183 #if defined(__LITTLE_ENDIAN_BITFIELD)
184 unsigned page_code :6; /* Page code - Should be 0x1b */
185 unsigned reserved1_6 :1; /* Reserved */
186 unsigned ps :1; /* Should be 0 */
187 #elif defined(__BIG_ENDIAN_BITFIELD)
188 unsigned ps :1; /* Should be 0 */
189 unsigned reserved1_6 :1; /* Reserved */
190 unsigned page_code :6; /* Page code - Should be 0x1b */
191 #else
192 #error "Bitfield endianness not defined! Check your byteorder.h"
193 #endif
194 u8 page_length; /* Page Length - Should be 0xa */
195 #if defined(__LITTLE_ENDIAN_BITFIELD)
196 unsigned reserved2 :6;
197 unsigned srfp :1; /* Supports reporting progress of format */
198 unsigned sflp :1; /* System floppy type device */
199 unsigned tlun :3; /* Total logical units supported by the device */
200 unsigned reserved3 :3;
201 unsigned sml :1; /* Single / Multiple lun supported */
202 unsigned ncd :1; /* Non cd optical device */
203 #elif defined(__BIG_ENDIAN_BITFIELD)
204 unsigned sflp :1; /* System floppy type device */
205 unsigned srfp :1; /* Supports reporting progress of format */
206 unsigned reserved2 :6;
207 unsigned ncd :1; /* Non cd optical device */
208 unsigned sml :1; /* Single / Multiple lun supported */
209 unsigned reserved3 :3;
210 unsigned tlun :3; /* Total logical units supported by the device */
211 #else
212 #error "Bitfield endianness not defined! Check your byteorder.h"
213 #endif
214 u8 reserved[8];
215 } idefloppy_capabilities_page_t;
216
217 /*
218 * Flexible disk page.
219 */
220 typedef struct {
221 #if defined(__LITTLE_ENDIAN_BITFIELD)
222 unsigned page_code :6; /* Page code - Should be 0x5 */
223 unsigned reserved1_6 :1; /* Reserved */
224 unsigned ps :1; /* The device is capable of saving the page */
225 #elif defined(__BIG_ENDIAN_BITFIELD)
226 unsigned ps :1; /* The device is capable of saving the page */
227 unsigned reserved1_6 :1; /* Reserved */
228 unsigned page_code :6; /* Page code - Should be 0x5 */
229 #else
230 #error "Bitfield endianness not defined! Check your byteorder.h"
231 #endif
232 u8 page_length; /* Page Length - Should be 0x1e */
233 u16 transfer_rate; /* In kilobits per second */
234 u8 heads, sectors; /* Number of heads, Number of sectors per track */
235 u16 sector_size; /* Byes per sector */
236 u16 cyls; /* Number of cylinders */
237 u8 reserved10[10];
238 u8 motor_delay; /* Motor off delay */
239 u8 reserved21[7];
240 u16 rpm; /* Rotations per minute */
241 u8 reserved30[2];
242 } idefloppy_flexible_disk_page_t;
243
244 /*
245 * Format capacity
246 */
247 typedef struct {
248 u8 reserved[3];
249 u8 length; /* Length of the following descriptors in bytes */
250 } idefloppy_capacity_header_t;
251
252 typedef struct {
253 u32 blocks; /* Number of blocks */
254 #if defined(__LITTLE_ENDIAN_BITFIELD)
255 unsigned dc :2; /* Descriptor Code */
256 unsigned reserved :6;
257 #elif defined(__BIG_ENDIAN_BITFIELD)
258 unsigned reserved :6;
259 unsigned dc :2; /* Descriptor Code */
260 #else
261 #error "Bitfield endianness not defined! Check your byteorder.h"
262 #endif
263 u8 length_msb; /* Block Length (MSB)*/
264 u16 length; /* Block Length */
265 } idefloppy_capacity_descriptor_t;
266
267 #define CAPACITY_INVALID 0x00
268 #define CAPACITY_UNFORMATTED 0x01
269 #define CAPACITY_CURRENT 0x02
270 #define CAPACITY_NO_CARTRIDGE 0x03
271
272 /*
273 * Most of our global data which we need to save even as we leave the
274 * driver due to an interrupt or a timer event is stored in a variable
275 * of type idefloppy_floppy_t, defined below.
276 */
277 typedef struct ide_floppy_obj {
278 ide_drive_t *drive;
279 ide_driver_t *driver;
280 struct gendisk *disk;
281 struct kref kref;
282 unsigned int openers; /* protected by BKL for now */
283
284 /* Current packet command */
285 idefloppy_pc_t *pc;
286 /* Last failed packet command */
287 idefloppy_pc_t *failed_pc;
288 /* Packet command stack */
289 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
290 /* Next free packet command storage space */
291 int pc_stack_index;
292 struct request rq_stack[IDEFLOPPY_PC_STACK];
293 /* We implement a circular array */
294 int rq_stack_index;
295
296 /*
297 * Last error information
298 */
299 u8 sense_key, asc, ascq;
300 /* delay this long before sending packet command */
301 u8 ticks;
302 int progress_indication;
303
304 /*
305 * Device information
306 */
307 /* Current format */
308 int blocks, block_size, bs_factor;
309 /* Last format capacity */
310 idefloppy_capacity_descriptor_t capacity;
311 /* Copy of the flexible disk page */
312 idefloppy_flexible_disk_page_t flexible_disk_page;
313 /* Write protect */
314 int wp;
315 /* Supports format progress report */
316 int srfp;
317 /* Status/Action flags */
318 unsigned long flags;
319 } idefloppy_floppy_t;
320
321 #define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
322
323 /*
324 * Floppy flag bits values.
325 */
326 #define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */
327 #define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */
328 #define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */
329 #define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */
330 #define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */
331 #define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */
332
333 /*
334 * ATAPI floppy drive packet commands
335 */
336 #define IDEFLOPPY_FORMAT_UNIT_CMD 0x04
337 #define IDEFLOPPY_INQUIRY_CMD 0x12
338 #define IDEFLOPPY_MODE_SELECT_CMD 0x55
339 #define IDEFLOPPY_MODE_SENSE_CMD 0x5a
340 #define IDEFLOPPY_READ10_CMD 0x28
341 #define IDEFLOPPY_READ12_CMD 0xa8
342 #define IDEFLOPPY_READ_CAPACITY_CMD 0x23
343 #define IDEFLOPPY_REQUEST_SENSE_CMD 0x03
344 #define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e
345 #define IDEFLOPPY_SEEK_CMD 0x2b
346 #define IDEFLOPPY_START_STOP_CMD 0x1b
347 #define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00
348 #define IDEFLOPPY_VERIFY_CMD 0x2f
349 #define IDEFLOPPY_WRITE10_CMD 0x2a
350 #define IDEFLOPPY_WRITE12_CMD 0xaa
351 #define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e
352
353 /*
354 * Defines for the mode sense command
355 */
356 #define MODE_SENSE_CURRENT 0x00
357 #define MODE_SENSE_CHANGEABLE 0x01
358 #define MODE_SENSE_DEFAULT 0x02
359 #define MODE_SENSE_SAVED 0x03
360
361 /*
362 * IOCTLs used in low-level formatting.
363 */
364
365 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600
366 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601
367 #define IDEFLOPPY_IOCTL_FORMAT_START 0x4602
368 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603
369
370 #if 0
371 /*
372 * Special requests for our block device strategy routine.
373 */
374 #define IDEFLOPPY_FIRST_RQ 90
375
376 /*
377 * IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue.
378 */
379 #define IDEFLOPPY_PC_RQ 90
380
381 #define IDEFLOPPY_LAST_RQ 90
382
383 /*
384 * A macro which can be used to check if a given request command
385 * originated in the driver or in the buffer cache layer.
386 */
387 #define IDEFLOPPY_RQ_CMD(cmd) ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ))
388
389 #endif
390
391 /*
392 * Error codes which are returned in rq->errors to the higher part
393 * of the driver.
394 */
395 #define IDEFLOPPY_ERROR_GENERAL 101
396
397 /*
398 * The following is used to format the general configuration word of
399 * the ATAPI IDENTIFY DEVICE command.
400 */
401 struct idefloppy_id_gcw {
402 #if defined(__LITTLE_ENDIAN_BITFIELD)
403 unsigned packet_size :2; /* Packet Size */
404 unsigned reserved234 :3; /* Reserved */
405 unsigned drq_type :2; /* Command packet DRQ type */
406 unsigned removable :1; /* Removable media */
407 unsigned device_type :5; /* Device type */
408 unsigned reserved13 :1; /* Reserved */
409 unsigned protocol :2; /* Protocol type */
410 #elif defined(__BIG_ENDIAN_BITFIELD)
411 unsigned protocol :2; /* Protocol type */
412 unsigned reserved13 :1; /* Reserved */
413 unsigned device_type :5; /* Device type */
414 unsigned removable :1; /* Removable media */
415 unsigned drq_type :2; /* Command packet DRQ type */
416 unsigned reserved234 :3; /* Reserved */
417 unsigned packet_size :2; /* Packet Size */
418 #else
419 #error "Bitfield endianness not defined! Check your byteorder.h"
420 #endif
421 };
422
423 /*
424 * INQUIRY packet command - Data Format
425 */
426 typedef struct {
427 #if defined(__LITTLE_ENDIAN_BITFIELD)
428 unsigned device_type :5; /* Peripheral Device Type */
429 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
430 unsigned reserved1_6t0 :7; /* Reserved */
431 unsigned rmb :1; /* Removable Medium Bit */
432 unsigned ansi_version :3; /* ANSI Version */
433 unsigned ecma_version :3; /* ECMA Version */
434 unsigned iso_version :2; /* ISO Version */
435 unsigned response_format :4; /* Response Data Format */
436 unsigned reserved3_45 :2; /* Reserved */
437 unsigned reserved3_6 :1; /* TrmIOP - Reserved */
438 unsigned reserved3_7 :1; /* AENC - Reserved */
439 #elif defined(__BIG_ENDIAN_BITFIELD)
440 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
441 unsigned device_type :5; /* Peripheral Device Type */
442 unsigned rmb :1; /* Removable Medium Bit */
443 unsigned reserved1_6t0 :7; /* Reserved */
444 unsigned iso_version :2; /* ISO Version */
445 unsigned ecma_version :3; /* ECMA Version */
446 unsigned ansi_version :3; /* ANSI Version */
447 unsigned reserved3_7 :1; /* AENC - Reserved */
448 unsigned reserved3_6 :1; /* TrmIOP - Reserved */
449 unsigned reserved3_45 :2; /* Reserved */
450 unsigned response_format :4; /* Response Data Format */
451 #else
452 #error "Bitfield endianness not defined! Check your byteorder.h"
453 #endif
454 u8 additional_length; /* Additional Length (total_length-4) */
455 u8 rsv5, rsv6, rsv7; /* Reserved */
456 u8 vendor_id[8]; /* Vendor Identification */
457 u8 product_id[16]; /* Product Identification */
458 u8 revision_level[4]; /* Revision Level */
459 u8 vendor_specific[20]; /* Vendor Specific - Optional */
460 u8 reserved56t95[40]; /* Reserved - Optional */
461 /* Additional information may be returned */
462 } idefloppy_inquiry_result_t;
463
464 /*
465 * REQUEST SENSE packet command result - Data Format.
466 */
467 typedef struct {
468 #if defined(__LITTLE_ENDIAN_BITFIELD)
469 unsigned error_code :7; /* Current error (0x70) */
470 unsigned valid :1; /* The information field conforms to SFF-8070i */
471 u8 reserved1 :8; /* Reserved */
472 unsigned sense_key :4; /* Sense Key */
473 unsigned reserved2_4 :1; /* Reserved */
474 unsigned ili :1; /* Incorrect Length Indicator */
475 unsigned reserved2_67 :2;
476 #elif defined(__BIG_ENDIAN_BITFIELD)
477 unsigned valid :1; /* The information field conforms to SFF-8070i */
478 unsigned error_code :7; /* Current error (0x70) */
479 u8 reserved1 :8; /* Reserved */
480 unsigned reserved2_67 :2;
481 unsigned ili :1; /* Incorrect Length Indicator */
482 unsigned reserved2_4 :1; /* Reserved */
483 unsigned sense_key :4; /* Sense Key */
484 #else
485 #error "Bitfield endianness not defined! Check your byteorder.h"
486 #endif
487 u32 information __attribute__ ((packed));
488 u8 asl; /* Additional sense length (n-7) */
489 u32 command_specific; /* Additional command specific information */
490 u8 asc; /* Additional Sense Code */
491 u8 ascq; /* Additional Sense Code Qualifier */
492 u8 replaceable_unit_code; /* Field Replaceable Unit Code */
493 u8 sksv[3];
494 u8 pad[2]; /* Padding to 20 bytes */
495 } idefloppy_request_sense_result_t;
496
497 /*
498 * Pages of the SELECT SENSE / MODE SENSE packet commands.
499 */
500 #define IDEFLOPPY_CAPABILITIES_PAGE 0x1b
501 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05
502
503 /*
504 * Mode Parameter Header for the MODE SENSE packet command
505 */
506 typedef struct {
507 u16 mode_data_length; /* Length of the following data transfer */
508 u8 medium_type; /* Medium Type */
509 #if defined(__LITTLE_ENDIAN_BITFIELD)
510 unsigned reserved3 :7;
511 unsigned wp :1; /* Write protect */
512 #elif defined(__BIG_ENDIAN_BITFIELD)
513 unsigned wp :1; /* Write protect */
514 unsigned reserved3 :7;
515 #else
516 #error "Bitfield endianness not defined! Check your byteorder.h"
517 #endif
518 u8 reserved[4];
519 } idefloppy_mode_parameter_header_t;
520
521 static DEFINE_MUTEX(idefloppy_ref_mutex);
522
523 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
524
525 #define ide_floppy_g(disk) \
526 container_of((disk)->private_data, struct ide_floppy_obj, driver)
527
528 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
529 {
530 struct ide_floppy_obj *floppy = NULL;
531
532 mutex_lock(&idefloppy_ref_mutex);
533 floppy = ide_floppy_g(disk);
534 if (floppy)
535 kref_get(&floppy->kref);
536 mutex_unlock(&idefloppy_ref_mutex);
537 return floppy;
538 }
539
540 static void ide_floppy_release(struct kref *);
541
542 static void ide_floppy_put(struct ide_floppy_obj *floppy)
543 {
544 mutex_lock(&idefloppy_ref_mutex);
545 kref_put(&floppy->kref, ide_floppy_release);
546 mutex_unlock(&idefloppy_ref_mutex);
547 }
548
549 /*
550 * Too bad. The drive wants to send us data which we are not ready to accept.
551 * Just throw it away.
552 */
553 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
554 {
555 while (bcount--)
556 (void) HWIF(drive)->INB(IDE_DATA_REG);
557 }
558
559 #if IDEFLOPPY_DEBUG_BUGS
560 static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
561 {
562 while (bcount--)
563 HWIF(drive)->OUTB(0, IDE_DATA_REG);
564 }
565 #endif /* IDEFLOPPY_DEBUG_BUGS */
566
567
568 /*
569 * idefloppy_do_end_request is used to finish servicing a request.
570 *
571 * For read/write requests, we will call ide_end_request to pass to the
572 * next buffer.
573 */
574 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
575 {
576 idefloppy_floppy_t *floppy = drive->driver_data;
577 struct request *rq = HWGROUP(drive)->rq;
578 int error;
579
580 debug_log(KERN_INFO "Reached idefloppy_end_request\n");
581
582 switch (uptodate) {
583 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
584 case 1: error = 0; break;
585 default: error = uptodate;
586 }
587 if (error)
588 floppy->failed_pc = NULL;
589 /* Why does this happen? */
590 if (!rq)
591 return 0;
592 if (!blk_special_request(rq)) {
593 /* our real local end request function */
594 ide_end_request(drive, uptodate, nsecs);
595 return 0;
596 }
597 rq->errors = error;
598 /* fixme: need to move this local also */
599 ide_end_drive_cmd(drive, 0, 0);
600 return 0;
601 }
602
603 static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
604 {
605 struct request *rq = pc->rq;
606 struct bio_vec *bvec;
607 struct bio *bio;
608 unsigned long flags;
609 char *data;
610 int count, i, done = 0;
611
612 rq_for_each_bio(bio, rq) {
613 bio_for_each_segment(bvec, bio, i) {
614 if (!bcount)
615 break;
616
617 count = min(bvec->bv_len, bcount);
618
619 data = bvec_kmap_irq(bvec, &flags);
620 drive->hwif->atapi_input_bytes(drive, data, count);
621 bvec_kunmap_irq(data, &flags);
622
623 bcount -= count;
624 pc->b_count += count;
625 done += count;
626 }
627 }
628
629 idefloppy_do_end_request(drive, 1, done >> 9);
630
631 if (bcount) {
632 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
633 idefloppy_discard_data(drive, bcount);
634 }
635 }
636
637 static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
638 {
639 struct request *rq = pc->rq;
640 struct bio *bio;
641 struct bio_vec *bvec;
642 unsigned long flags;
643 int count, i, done = 0;
644 char *data;
645
646 rq_for_each_bio(bio, rq) {
647 bio_for_each_segment(bvec, bio, i) {
648 if (!bcount)
649 break;
650
651 count = min(bvec->bv_len, bcount);
652
653 data = bvec_kmap_irq(bvec, &flags);
654 drive->hwif->atapi_output_bytes(drive, data, count);
655 bvec_kunmap_irq(data, &flags);
656
657 bcount -= count;
658 pc->b_count += count;
659 done += count;
660 }
661 }
662
663 idefloppy_do_end_request(drive, 1, done >> 9);
664
665 #if IDEFLOPPY_DEBUG_BUGS
666 if (bcount) {
667 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
668 idefloppy_write_zeros(drive, bcount);
669 }
670 #endif
671 }
672
673 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
674 {
675 struct request *rq = pc->rq;
676 struct bio *bio = rq->bio;
677
678 while ((bio = rq->bio) != NULL)
679 idefloppy_do_end_request(drive, 1, 0);
680 }
681
682 /*
683 * idefloppy_queue_pc_head generates a new packet command request in front
684 * of the request queue, before the current request, so that it will be
685 * processed immediately, on the next pass through the driver.
686 */
687 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
688 {
689 struct ide_floppy_obj *floppy = drive->driver_data;
690
691 ide_init_drive_cmd(rq);
692 rq->buffer = (char *) pc;
693 rq->cmd_type = REQ_TYPE_SPECIAL;
694 rq->rq_disk = floppy->disk;
695 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
696 }
697
698 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
699 {
700 idefloppy_floppy_t *floppy = drive->driver_data;
701
702 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
703 floppy->pc_stack_index=0;
704 return (&floppy->pc_stack[floppy->pc_stack_index++]);
705 }
706
707 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
708 {
709 idefloppy_floppy_t *floppy = drive->driver_data;
710
711 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
712 floppy->rq_stack_index = 0;
713 return (&floppy->rq_stack[floppy->rq_stack_index++]);
714 }
715
716 /*
717 * idefloppy_analyze_error is called on each failed packet command retry
718 * to analyze the request sense.
719 */
720 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
721 {
722 idefloppy_floppy_t *floppy = drive->driver_data;
723
724 floppy->sense_key = result->sense_key;
725 floppy->asc = result->asc;
726 floppy->ascq = result->ascq;
727 floppy->progress_indication = result->sksv[0] & 0x80 ?
728 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
729 if (floppy->failed_pc)
730 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
731 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
732 result->sense_key, result->asc, result->ascq);
733 else
734 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
735 "ascq = %x\n", result->sense_key,
736 result->asc, result->ascq);
737 }
738
739 static void idefloppy_request_sense_callback (ide_drive_t *drive)
740 {
741 idefloppy_floppy_t *floppy = drive->driver_data;
742
743 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
744
745 if (!floppy->pc->error) {
746 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
747 idefloppy_do_end_request(drive, 1, 0);
748 } else {
749 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
750 idefloppy_do_end_request(drive, 0, 0);
751 }
752 }
753
754 /*
755 * General packet command callback function.
756 */
757 static void idefloppy_pc_callback (ide_drive_t *drive)
758 {
759 idefloppy_floppy_t *floppy = drive->driver_data;
760
761 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
762
763 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
764 }
765
766 /*
767 * idefloppy_init_pc initializes a packet command.
768 */
769 static void idefloppy_init_pc (idefloppy_pc_t *pc)
770 {
771 memset(pc->c, 0, 12);
772 pc->retries = 0;
773 pc->flags = 0;
774 pc->request_transfer = 0;
775 pc->buffer = pc->pc_buffer;
776 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
777 pc->callback = &idefloppy_pc_callback;
778 }
779
780 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
781 {
782 idefloppy_init_pc(pc);
783 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
784 pc->c[4] = 255;
785 pc->request_transfer = 18;
786 pc->callback = &idefloppy_request_sense_callback;
787 }
788
789 /*
790 * idefloppy_retry_pc is called when an error was detected during the
791 * last packet command. We queue a request sense packet command in
792 * the head of the request list.
793 */
794 static void idefloppy_retry_pc (ide_drive_t *drive)
795 {
796 idefloppy_pc_t *pc;
797 struct request *rq;
798 atapi_error_t error;
799
800 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
801 pc = idefloppy_next_pc_storage(drive);
802 rq = idefloppy_next_rq_storage(drive);
803 idefloppy_create_request_sense_cmd(pc);
804 idefloppy_queue_pc_head(drive, pc, rq);
805 }
806
807 /*
808 * idefloppy_pc_intr is the usual interrupt handler which will be called
809 * during a packet command.
810 */
811 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
812 {
813 idefloppy_floppy_t *floppy = drive->driver_data;
814 atapi_status_t status;
815 atapi_bcount_t bcount;
816 atapi_ireason_t ireason;
817 idefloppy_pc_t *pc = floppy->pc;
818 struct request *rq = pc->rq;
819 unsigned int temp;
820
821 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
822 __FUNCTION__);
823
824 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
825 if (HWIF(drive)->ide_dma_end(drive)) {
826 set_bit(PC_DMA_ERROR, &pc->flags);
827 } else {
828 pc->actually_transferred = pc->request_transfer;
829 idefloppy_update_buffers(drive, pc);
830 }
831 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
832 }
833
834 /* Clear the interrupt */
835 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
836
837 if (!status.b.drq) { /* No more interrupts */
838 debug_log(KERN_INFO "Packet command completed, %d bytes "
839 "transferred\n", pc->actually_transferred);
840 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
841
842 local_irq_enable_in_hardirq();
843
844 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
845 /* Error detected */
846 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
847 drive->name);
848 rq->errors++;
849 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
850 printk(KERN_ERR "ide-floppy: I/O error in "
851 "request sense command\n");
852 return ide_do_reset(drive);
853 }
854 /* Retry operation */
855 idefloppy_retry_pc(drive);
856 /* queued, but not started */
857 return ide_stopped;
858 }
859 pc->error = 0;
860 if (floppy->failed_pc == pc)
861 floppy->failed_pc = NULL;
862 /* Command finished - Call the callback function */
863 pc->callback(drive);
864 return ide_stopped;
865 }
866
867 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
868 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
869 "more interrupts in DMA mode\n");
870 ide_dma_off(drive);
871 return ide_do_reset(drive);
872 }
873
874 /* Get the number of bytes to transfer */
875 bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
876 bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
877 /* on this interrupt */
878 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
879
880 if (ireason.b.cod) {
881 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
882 return ide_do_reset(drive);
883 }
884 if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
885 /* Hopefully, we will never get here */
886 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
887 ireason.b.io ? "Write":"Read");
888 printk(KERN_ERR "but the floppy wants us to %s !\n",
889 ireason.b.io ? "Read":"Write");
890 return ide_do_reset(drive);
891 }
892 if (!test_bit(PC_WRITING, &pc->flags)) {
893 /* Reading - Check that we have enough space */
894 temp = pc->actually_transferred + bcount.all;
895 if (temp > pc->request_transfer) {
896 if (temp > pc->buffer_size) {
897 printk(KERN_ERR "ide-floppy: The floppy wants "
898 "to send us more data than expected "
899 "- discarding data\n");
900 idefloppy_discard_data(drive,bcount.all);
901 BUG_ON(HWGROUP(drive)->handler != NULL);
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 BUG_ON(HWGROUP(drive)->handler != NULL);
935 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */
936 return ide_started;
937 }
938
939 /*
940 * This is the original routine that did the packet transfer.
941 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
942 * for that drive below. The algorithm is chosen based on drive type
943 */
944 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
945 {
946 ide_startstop_t startstop;
947 idefloppy_floppy_t *floppy = drive->driver_data;
948 atapi_ireason_t ireason;
949
950 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
951 printk(KERN_ERR "ide-floppy: Strange, packet command "
952 "initiated yet DRQ isn't asserted\n");
953 return startstop;
954 }
955 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
956 if (!ireason.b.cod || ireason.b.io) {
957 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
958 "issuing a packet command\n");
959 return ide_do_reset(drive);
960 }
961 BUG_ON(HWGROUP(drive)->handler != NULL);
962 /* Set the interrupt routine */
963 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
964 /* Send the actual packet */
965 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
966 return ide_started;
967 }
968
969
970 /*
971 * What we have here is a classic case of a top half / bottom half
972 * interrupt service routine. In interrupt mode, the device sends
973 * an interrupt to signal it's ready to receive a packet. However,
974 * we need to delay about 2-3 ticks before issuing the packet or we
975 * gets in trouble.
976 *
977 * So, follow carefully. transfer_pc1 is called as an interrupt (or
978 * directly). In either case, when the device says it's ready for a
979 * packet, we schedule the packet transfer to occur about 2-3 ticks
980 * later in transfer_pc2.
981 */
982 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
983 {
984 idefloppy_floppy_t *floppy = drive->driver_data;
985
986 /* Send the actual packet */
987 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
988 /* Timeout for the packet command */
989 return IDEFLOPPY_WAIT_CMD;
990 }
991
992 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
993 {
994 idefloppy_floppy_t *floppy = drive->driver_data;
995 ide_startstop_t startstop;
996 atapi_ireason_t ireason;
997
998 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
999 printk(KERN_ERR "ide-floppy: Strange, packet command "
1000 "initiated yet DRQ isn't asserted\n");
1001 return startstop;
1002 }
1003 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
1004 if (!ireason.b.cod || ireason.b.io) {
1005 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
1006 "while issuing a packet command\n");
1007 return ide_do_reset(drive);
1008 }
1009 /*
1010 * The following delay solves a problem with ATAPI Zip 100 drives
1011 * where the Busy flag was apparently being deasserted before the
1012 * unit was ready to receive data. This was happening on a
1013 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
1014 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
1015 * used until after the packet is moved in about 50 msec.
1016 */
1017 BUG_ON(HWGROUP(drive)->handler != NULL);
1018 ide_set_handler(drive,
1019 &idefloppy_pc_intr, /* service routine for packet command */
1020 floppy->ticks, /* wait this long before "failing" */
1021 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */
1022 return ide_started;
1023 }
1024
1025 /**
1026 * idefloppy_should_report_error()
1027 *
1028 * Supresses error messages resulting from Medium not present
1029 */
1030 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1031 {
1032 if (floppy->sense_key == 0x02 &&
1033 floppy->asc == 0x3a &&
1034 floppy->ascq == 0x00)
1035 return 0;
1036 return 1;
1037 }
1038
1039 /*
1040 * Issue a packet command
1041 */
1042 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1043 {
1044 idefloppy_floppy_t *floppy = drive->driver_data;
1045 ide_hwif_t *hwif = drive->hwif;
1046 atapi_feature_t feature;
1047 atapi_bcount_t bcount;
1048 ide_handler_t *pkt_xfer_routine;
1049
1050 #if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone
1051 and have lived on another thread's stack; that stack may have become
1052 unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */
1053 #if IDEFLOPPY_DEBUG_BUGS
1054 if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD &&
1055 pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
1056 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - "
1057 "Two request sense in serial were issued\n");
1058 }
1059 #endif /* IDEFLOPPY_DEBUG_BUGS */
1060 #endif
1061
1062 if (floppy->failed_pc == NULL &&
1063 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1064 floppy->failed_pc = pc;
1065 /* Set the current packet command */
1066 floppy->pc = pc;
1067
1068 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1069 test_bit(PC_ABORT, &pc->flags)) {
1070 /*
1071 * We will "abort" retrying a packet command in case
1072 * a legitimate error code was received.
1073 */
1074 if (!test_bit(PC_ABORT, &pc->flags)) {
1075 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1076 if (idefloppy_should_report_error(floppy))
1077 printk(KERN_ERR "ide-floppy: %s: I/O error, "
1078 "pc = %2x, key = %2x, "
1079 "asc = %2x, ascq = %2x\n",
1080 drive->name, pc->c[0],
1081 floppy->sense_key,
1082 floppy->asc, floppy->ascq);
1083 }
1084 /* Giving up */
1085 pc->error = IDEFLOPPY_ERROR_GENERAL;
1086 }
1087 floppy->failed_pc = NULL;
1088 pc->callback(drive);
1089 return ide_stopped;
1090 }
1091
1092 debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1093
1094 pc->retries++;
1095 /* We haven't transferred any data yet */
1096 pc->actually_transferred = 0;
1097 pc->current_position = pc->buffer;
1098 bcount.all = min(pc->request_transfer, 63 * 1024);
1099
1100 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
1101 ide_dma_off(drive);
1102
1103 feature.all = 0;
1104
1105 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1106 feature.b.dma = !hwif->dma_setup(drive);
1107
1108 if (IDE_CONTROL_REG)
1109 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1110 /* Use PIO/DMA */
1111 HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
1112 HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
1113 HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
1114 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1115
1116 if (feature.b.dma) { /* Begin DMA, if necessary */
1117 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1118 hwif->dma_start(drive);
1119 }
1120
1121 /* Can we transfer the packet when we get the interrupt or wait? */
1122 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1123 /* wait */
1124 pkt_xfer_routine = &idefloppy_transfer_pc1;
1125 } else {
1126 /* immediate */
1127 pkt_xfer_routine = &idefloppy_transfer_pc;
1128 }
1129
1130 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1131 /* Issue the packet command */
1132 ide_execute_command(drive, WIN_PACKETCMD,
1133 pkt_xfer_routine,
1134 IDEFLOPPY_WAIT_CMD,
1135 NULL);
1136 return ide_started;
1137 } else {
1138 /* Issue the packet command */
1139 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1140 return (*pkt_xfer_routine) (drive);
1141 }
1142 }
1143
1144 static void idefloppy_rw_callback (ide_drive_t *drive)
1145 {
1146 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1147
1148 idefloppy_do_end_request(drive, 1, 0);
1149 return;
1150 }
1151
1152 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1153 {
1154 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1155 "prevent = %d\n", prevent);
1156
1157 idefloppy_init_pc(pc);
1158 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1159 pc->c[4] = prevent;
1160 }
1161
1162 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1163 {
1164 idefloppy_init_pc(pc);
1165 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1166 pc->c[7] = 255;
1167 pc->c[8] = 255;
1168 pc->request_transfer = 255;
1169 }
1170
1171 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1172 int flags)
1173 {
1174 idefloppy_init_pc(pc);
1175 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1176 pc->c[1] = 0x17;
1177
1178 memset(pc->buffer, 0, 12);
1179 pc->buffer[1] = 0xA2;
1180 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1181
1182 if (flags & 1) /* Verify bit on... */
1183 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */
1184 pc->buffer[3] = 8;
1185
1186 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1187 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1188 pc->buffer_size=12;
1189 set_bit(PC_WRITING, &pc->flags);
1190 }
1191
1192 /*
1193 * A mode sense command is used to "sense" floppy parameters.
1194 */
1195 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1196 {
1197 u16 length = sizeof(idefloppy_mode_parameter_header_t);
1198
1199 idefloppy_init_pc(pc);
1200 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1201 pc->c[1] = 0;
1202 pc->c[2] = page_code + (type << 6);
1203
1204 switch (page_code) {
1205 case IDEFLOPPY_CAPABILITIES_PAGE:
1206 length += 12;
1207 break;
1208 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1209 length += 32;
1210 break;
1211 default:
1212 printk(KERN_ERR "ide-floppy: unsupported page code "
1213 "in create_mode_sense_cmd\n");
1214 }
1215 put_unaligned(htons(length), (u16 *) &pc->c[7]);
1216 pc->request_transfer = length;
1217 }
1218
1219 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1220 {
1221 idefloppy_init_pc(pc);
1222 pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1223 pc->c[4] = start;
1224 }
1225
1226 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1227 {
1228 idefloppy_init_pc(pc);
1229 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1230 }
1231
1232 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1233 {
1234 int block = sector / floppy->bs_factor;
1235 int blocks = rq->nr_sectors / floppy->bs_factor;
1236 int cmd = rq_data_dir(rq);
1237
1238 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1239 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1240 block, blocks);
1241
1242 idefloppy_init_pc(pc);
1243 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1244 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1245 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1246 } else {
1247 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1248 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1249 }
1250 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1251 pc->callback = &idefloppy_rw_callback;
1252 pc->rq = rq;
1253 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1254 if (rq->cmd_flags & REQ_RW)
1255 set_bit(PC_WRITING, &pc->flags);
1256 pc->buffer = NULL;
1257 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1258 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1259 }
1260
1261 static int
1262 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1263 {
1264 /*
1265 * just support eject for now, it would not be hard to make the
1266 * REQ_BLOCK_PC support fully-featured
1267 */
1268 if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD)
1269 return 1;
1270
1271 idefloppy_init_pc(pc);
1272 memcpy(pc->c, rq->cmd, sizeof(pc->c));
1273 return 0;
1274 }
1275
1276 /*
1277 * idefloppy_do_request is our request handling function.
1278 */
1279 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1280 {
1281 idefloppy_floppy_t *floppy = drive->driver_data;
1282 idefloppy_pc_t *pc;
1283 unsigned long block = (unsigned long)block_s;
1284
1285 debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
1286 rq->rq_disk ? rq->rq_disk->disk_name : "?",
1287 rq->flags, rq->errors);
1288 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1289 "current_nr_sectors: %d\n", (long)rq->sector,
1290 rq->nr_sectors, rq->current_nr_sectors);
1291
1292 if (rq->errors >= ERROR_MAX) {
1293 if (floppy->failed_pc != NULL) {
1294 if (idefloppy_should_report_error(floppy))
1295 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1296 " key = %2x, asc = %2x, ascq = %2x\n",
1297 drive->name, floppy->failed_pc->c[0],
1298 floppy->sense_key, floppy->asc, floppy->ascq);
1299 }
1300 else
1301 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1302 drive->name);
1303 idefloppy_do_end_request(drive, 0, 0);
1304 return ide_stopped;
1305 }
1306 if (blk_fs_request(rq)) {
1307 if (((long)rq->sector % floppy->bs_factor) ||
1308 (rq->nr_sectors % floppy->bs_factor)) {
1309 printk("%s: unsupported r/w request size\n",
1310 drive->name);
1311 idefloppy_do_end_request(drive, 0, 0);
1312 return ide_stopped;
1313 }
1314 pc = idefloppy_next_pc_storage(drive);
1315 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1316 } else if (blk_special_request(rq)) {
1317 pc = (idefloppy_pc_t *) rq->buffer;
1318 } else if (blk_pc_request(rq)) {
1319 pc = idefloppy_next_pc_storage(drive);
1320 if (idefloppy_blockpc_cmd(floppy, pc, rq)) {
1321 idefloppy_do_end_request(drive, 0, 0);
1322 return ide_stopped;
1323 }
1324 } else {
1325 blk_dump_rq_flags(rq,
1326 "ide-floppy: unsupported command in queue");
1327 idefloppy_do_end_request(drive, 0, 0);
1328 return ide_stopped;
1329 }
1330
1331 pc->rq = rq;
1332 return idefloppy_issue_pc(drive, pc);
1333 }
1334
1335 /*
1336 * idefloppy_queue_pc_tail adds a special packet command request to the
1337 * tail of the request queue, and waits for it to be serviced.
1338 */
1339 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1340 {
1341 struct ide_floppy_obj *floppy = drive->driver_data;
1342 struct request rq;
1343
1344 ide_init_drive_cmd (&rq);
1345 rq.buffer = (char *) pc;
1346 rq.cmd_type = REQ_TYPE_SPECIAL;
1347 rq.rq_disk = floppy->disk;
1348
1349 return ide_do_drive_cmd(drive, &rq, ide_wait);
1350 }
1351
1352 /*
1353 * Look at the flexible disk page parameters. We will ignore the CHS
1354 * capacity parameters and use the LBA parameters instead.
1355 */
1356 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1357 {
1358 idefloppy_floppy_t *floppy = drive->driver_data;
1359 idefloppy_pc_t pc;
1360 idefloppy_mode_parameter_header_t *header;
1361 idefloppy_flexible_disk_page_t *page;
1362 int capacity, lba_capacity;
1363
1364 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1365 if (idefloppy_queue_pc_tail(drive,&pc)) {
1366 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1367 "page parameters\n");
1368 return 1;
1369 }
1370 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1371 floppy->wp = header->wp;
1372 set_disk_ro(floppy->disk, floppy->wp);
1373 page = (idefloppy_flexible_disk_page_t *) (header + 1);
1374
1375 page->transfer_rate = ntohs(page->transfer_rate);
1376 page->sector_size = ntohs(page->sector_size);
1377 page->cyls = ntohs(page->cyls);
1378 page->rpm = ntohs(page->rpm);
1379 capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1380 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1381 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1382 "%d sector size, %d rpm\n",
1383 drive->name, capacity / 1024, page->cyls,
1384 page->heads, page->sectors,
1385 page->transfer_rate / 8, page->sector_size, page->rpm);
1386
1387 floppy->flexible_disk_page = *page;
1388 drive->bios_cyl = page->cyls;
1389 drive->bios_head = page->heads;
1390 drive->bios_sect = page->sectors;
1391 lba_capacity = floppy->blocks * floppy->block_size;
1392 if (capacity < lba_capacity) {
1393 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1394 "bytes, but the drive only handles %d\n",
1395 drive->name, lba_capacity, capacity);
1396 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1397 }
1398 return 0;
1399 }
1400
1401 static int idefloppy_get_capability_page(ide_drive_t *drive)
1402 {
1403 idefloppy_floppy_t *floppy = drive->driver_data;
1404 idefloppy_pc_t pc;
1405 idefloppy_mode_parameter_header_t *header;
1406 idefloppy_capabilities_page_t *page;
1407
1408 floppy->srfp = 0;
1409 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1410 MODE_SENSE_CURRENT);
1411
1412 set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1413 if (idefloppy_queue_pc_tail(drive,&pc)) {
1414 return 1;
1415 }
1416
1417 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1418 page= (idefloppy_capabilities_page_t *)(header+1);
1419 floppy->srfp = page->srfp;
1420 return (0);
1421 }
1422
1423 /*
1424 * Determine if a media is present in the floppy drive, and if so,
1425 * its LBA capacity.
1426 */
1427 static int idefloppy_get_capacity (ide_drive_t *drive)
1428 {
1429 idefloppy_floppy_t *floppy = drive->driver_data;
1430 idefloppy_pc_t pc;
1431 idefloppy_capacity_header_t *header;
1432 idefloppy_capacity_descriptor_t *descriptor;
1433 int i, descriptors, rc = 1, blocks, length;
1434
1435 drive->bios_cyl = 0;
1436 drive->bios_head = drive->bios_sect = 0;
1437 floppy->blocks = 0;
1438 floppy->bs_factor = 1;
1439 set_capacity(floppy->disk, 0);
1440
1441 idefloppy_create_read_capacity_cmd(&pc);
1442 if (idefloppy_queue_pc_tail(drive, &pc)) {
1443 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1444 return 1;
1445 }
1446 header = (idefloppy_capacity_header_t *) pc.buffer;
1447 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1448 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1449
1450 for (i = 0; i < descriptors; i++, descriptor++) {
1451 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1452 length = descriptor->length = ntohs(descriptor->length);
1453
1454 if (!i)
1455 {
1456 switch (descriptor->dc) {
1457 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1458 case CAPACITY_UNFORMATTED:
1459 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1460 /*
1461 * If it is not a clik drive, break out
1462 * (maintains previous driver behaviour)
1463 */
1464 break;
1465 case CAPACITY_CURRENT:
1466 /* Normal Zip/LS-120 disks */
1467 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1468 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1469 "sector size\n", drive->name,
1470 blocks * length / 1024, blocks, length);
1471 floppy->capacity = *descriptor;
1472 if (!length || length % 512) {
1473 printk(KERN_NOTICE "%s: %d bytes block size "
1474 "not supported\n", drive->name, length);
1475 } else {
1476 floppy->blocks = blocks;
1477 floppy->block_size = length;
1478 if ((floppy->bs_factor = length / 512) != 1)
1479 printk(KERN_NOTICE "%s: warning: non "
1480 "512 bytes block size not "
1481 "fully supported\n",
1482 drive->name);
1483 rc = 0;
1484 }
1485 break;
1486 case CAPACITY_NO_CARTRIDGE:
1487 /*
1488 * This is a KERN_ERR so it appears on screen
1489 * for the user to see
1490 */
1491 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1492 break;
1493 case CAPACITY_INVALID:
1494 printk(KERN_ERR "%s: Invalid capacity for disk "
1495 "in drive\n", drive->name);
1496 break;
1497 }
1498 }
1499 if (!i) {
1500 debug_log( "Descriptor 0 Code: %d\n",
1501 descriptor->dc);
1502 }
1503 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1504 "sector size\n", i, blocks * length / 1024, blocks,
1505 length);
1506 }
1507
1508 /* Clik! disk does not support get_flexible_disk_page */
1509 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1510 (void) idefloppy_get_flexible_disk_page(drive);
1511 }
1512
1513 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1514 return rc;
1515 }
1516
1517 /*
1518 ** Obtain the list of formattable capacities.
1519 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1520 ** descriptors to userland, instead of our own structures.
1521 **
1522 ** Userland gives us the following structure:
1523 **
1524 ** struct idefloppy_format_capacities {
1525 ** int nformats;
1526 ** struct {
1527 ** int nblocks;
1528 ** int blocksize;
1529 ** } formats[];
1530 ** } ;
1531 **
1532 ** userland initializes nformats to the number of allocated formats[]
1533 ** records. On exit we set nformats to the number of records we've
1534 ** actually initialized.
1535 **
1536 */
1537
1538 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1539 {
1540 idefloppy_pc_t pc;
1541 idefloppy_capacity_header_t *header;
1542 idefloppy_capacity_descriptor_t *descriptor;
1543 int i, descriptors, blocks, length;
1544 int u_array_size;
1545 int u_index;
1546 int __user *argp;
1547
1548 if (get_user(u_array_size, arg))
1549 return (-EFAULT);
1550
1551 if (u_array_size <= 0)
1552 return (-EINVAL);
1553
1554 idefloppy_create_read_capacity_cmd(&pc);
1555 if (idefloppy_queue_pc_tail(drive, &pc)) {
1556 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1557 return (-EIO);
1558 }
1559 header = (idefloppy_capacity_header_t *) pc.buffer;
1560 descriptors = header->length /
1561 sizeof(idefloppy_capacity_descriptor_t);
1562 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1563
1564 u_index = 0;
1565 argp = arg + 1;
1566
1567 /*
1568 ** We always skip the first capacity descriptor. That's the
1569 ** current capacity. We are interested in the remaining descriptors,
1570 ** the formattable capacities.
1571 */
1572
1573 for (i=0; i<descriptors; i++, descriptor++) {
1574 if (u_index >= u_array_size)
1575 break; /* User-supplied buffer too small */
1576 if (i == 0)
1577 continue; /* Skip the first descriptor */
1578
1579 blocks = ntohl(descriptor->blocks);
1580 length = ntohs(descriptor->length);
1581
1582 if (put_user(blocks, argp))
1583 return(-EFAULT);
1584 ++argp;
1585
1586 if (put_user(length, argp))
1587 return (-EFAULT);
1588 ++argp;
1589
1590 ++u_index;
1591 }
1592
1593 if (put_user(u_index, arg))
1594 return (-EFAULT);
1595 return (0);
1596 }
1597
1598 /*
1599 ** Send ATAPI_FORMAT_UNIT to the drive.
1600 **
1601 ** Userland gives us the following structure:
1602 **
1603 ** struct idefloppy_format_command {
1604 ** int nblocks;
1605 ** int blocksize;
1606 ** int flags;
1607 ** } ;
1608 **
1609 ** flags is a bitmask, currently, the only defined flag is:
1610 **
1611 ** 0x01 - verify media after format.
1612 */
1613
1614 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1615 {
1616 int blocks;
1617 int length;
1618 int flags;
1619 idefloppy_pc_t pc;
1620
1621 if (get_user(blocks, arg) ||
1622 get_user(length, arg+1) ||
1623 get_user(flags, arg+2)) {
1624 return (-EFAULT);
1625 }
1626
1627 /* Get the SFRP bit */
1628 (void) idefloppy_get_capability_page(drive);
1629 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1630 if (idefloppy_queue_pc_tail(drive, &pc)) {
1631 return (-EIO);
1632 }
1633
1634 return (0);
1635 }
1636
1637 /*
1638 ** Get ATAPI_FORMAT_UNIT progress indication.
1639 **
1640 ** Userland gives a pointer to an int. The int is set to a progress
1641 ** indicator 0-65536, with 65536=100%.
1642 **
1643 ** If the drive does not support format progress indication, we just check
1644 ** the dsc bit, and return either 0 or 65536.
1645 */
1646
1647 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1648 {
1649 idefloppy_floppy_t *floppy = drive->driver_data;
1650 idefloppy_pc_t pc;
1651 int progress_indication = 0x10000;
1652
1653 if (floppy->srfp) {
1654 idefloppy_create_request_sense_cmd(&pc);
1655 if (idefloppy_queue_pc_tail(drive, &pc)) {
1656 return (-EIO);
1657 }
1658
1659 if (floppy->sense_key == 2 &&
1660 floppy->asc == 4 &&
1661 floppy->ascq == 4) {
1662 progress_indication = floppy->progress_indication;
1663 }
1664 /* Else assume format_unit has finished, and we're
1665 ** at 0x10000 */
1666 } else {
1667 atapi_status_t status;
1668 unsigned long flags;
1669
1670 local_irq_save(flags);
1671 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
1672 local_irq_restore(flags);
1673
1674 progress_indication = !status.b.dsc ? 0 : 0x10000;
1675 }
1676 if (put_user(progress_indication, arg))
1677 return (-EFAULT);
1678
1679 return (0);
1680 }
1681
1682 /*
1683 * Return the current floppy capacity.
1684 */
1685 static sector_t idefloppy_capacity (ide_drive_t *drive)
1686 {
1687 idefloppy_floppy_t *floppy = drive->driver_data;
1688 unsigned long capacity = floppy->blocks * floppy->bs_factor;
1689
1690 return capacity;
1691 }
1692
1693 /*
1694 * idefloppy_identify_device checks if we can support a drive,
1695 * based on the ATAPI IDENTIFY command results.
1696 */
1697 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1698 {
1699 struct idefloppy_id_gcw gcw;
1700 #if IDEFLOPPY_DEBUG_INFO
1701 u16 mask,i;
1702 char buffer[80];
1703 #endif /* IDEFLOPPY_DEBUG_INFO */
1704
1705 *((u16 *) &gcw) = id->config;
1706
1707 #ifdef CONFIG_PPC
1708 /* kludge for Apple PowerBook internal zip */
1709 if ((gcw.device_type == 5) &&
1710 !strstr(id->model, "CD-ROM") &&
1711 strstr(id->model, "ZIP"))
1712 gcw.device_type = 0;
1713 #endif
1714
1715 #if IDEFLOPPY_DEBUG_INFO
1716 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1717 switch (gcw.protocol) {
1718 case 0: case 1: sprintf(buffer, "ATA");break;
1719 case 2: sprintf(buffer, "ATAPI");break;
1720 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1721 }
1722 printk(KERN_INFO "Protocol Type: %s\n", buffer);
1723 switch (gcw.device_type) {
1724 case 0: sprintf(buffer, "Direct-access Device");break;
1725 case 1: sprintf(buffer, "Streaming Tape Device");break;
1726 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1727 case 5: sprintf(buffer, "CD-ROM Device");break;
1728 case 6: sprintf(buffer, "Reserved");
1729 case 7: sprintf(buffer, "Optical memory Device");break;
1730 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1731 default: sprintf(buffer, "Reserved");
1732 }
1733 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1734 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1735 switch (gcw.drq_type) {
1736 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1737 case 1: sprintf(buffer, "Interrupt DRQ");break;
1738 case 2: sprintf(buffer, "Accelerated DRQ");break;
1739 case 3: sprintf(buffer, "Reserved");break;
1740 }
1741 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1742 switch (gcw.packet_size) {
1743 case 0: sprintf(buffer, "12 bytes");break;
1744 case 1: sprintf(buffer, "16 bytes");break;
1745 default: sprintf(buffer, "Reserved");break;
1746 }
1747 printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1748 printk(KERN_INFO "Model: %.40s\n",id->model);
1749 printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1750 printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1751 printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1752 printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1753 printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1754 printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1755 printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1756 printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1757 printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1758 printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1759 printk(KERN_INFO "Single Word DMA supported modes:\n");
1760 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1761 if (id->dma_1word & mask)
1762 printk(KERN_INFO " Mode %d%s\n", i,
1763 (id->dma_1word & (mask << 8)) ? " (active)" : "");
1764 }
1765 printk(KERN_INFO "Multi Word DMA supported modes:\n");
1766 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1767 if (id->dma_mword & mask)
1768 printk(KERN_INFO " Mode %d%s\n", i,
1769 (id->dma_mword & (mask << 8)) ? " (active)" : "");
1770 }
1771 if (id->field_valid & 0x0002) {
1772 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1773 id->eide_pio_modes & 1 ? "Mode 3":"None");
1774 if (id->eide_dma_min == 0)
1775 sprintf(buffer, "Not supported");
1776 else
1777 sprintf(buffer, "%d ns",id->eide_dma_min);
1778 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1779 if (id->eide_dma_time == 0)
1780 sprintf(buffer, "Not supported");
1781 else
1782 sprintf(buffer, "%d ns",id->eide_dma_time);
1783 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1784 if (id->eide_pio == 0)
1785 sprintf(buffer, "Not supported");
1786 else
1787 sprintf(buffer, "%d ns",id->eide_pio);
1788 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1789 buffer);
1790 if (id->eide_pio_iordy == 0)
1791 sprintf(buffer, "Not supported");
1792 else
1793 sprintf(buffer, "%d ns",id->eide_pio_iordy);
1794 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1795 } else
1796 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1797 #endif /* IDEFLOPPY_DEBUG_INFO */
1798
1799 if (gcw.protocol != 2)
1800 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1801 else if (gcw.device_type != 0)
1802 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1803 else if (!gcw.removable)
1804 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1805 else if (gcw.drq_type == 3) {
1806 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1807 } else if (gcw.packet_size != 0) {
1808 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1809 } else
1810 return 1;
1811 return 0;
1812 }
1813
1814 static void idefloppy_add_settings(ide_drive_t *drive)
1815 {
1816 idefloppy_floppy_t *floppy = drive->driver_data;
1817
1818 /*
1819 * drive setting name read/write ioctl ioctl data type min max mul_factor div_factor data pointer set function
1820 */
1821 ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
1822 ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
1823 ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
1824 ide_add_setting(drive, "ticks", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL);
1825 }
1826
1827 /*
1828 * Driver initialization.
1829 */
1830 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1831 {
1832 struct idefloppy_id_gcw gcw;
1833
1834 *((u16 *) &gcw) = drive->id->config;
1835 floppy->pc = floppy->pc_stack;
1836 if (gcw.drq_type == 1)
1837 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1838 /*
1839 * We used to check revisions here. At this point however
1840 * I'm giving up. Just assume they are all broken, its easier.
1841 *
1842 * The actual reason for the workarounds was likely
1843 * a driver bug after all rather than a firmware bug,
1844 * and the workaround below used to hide it. It should
1845 * be fixed as of version 1.9, but to be on the safe side
1846 * we'll leave the limitation below for the 2.2.x tree.
1847 */
1848
1849 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1850 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1851 /* This value will be visible in the /proc/ide/hdx/settings */
1852 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1853 blk_queue_max_sectors(drive->queue, 64);
1854 }
1855
1856 /*
1857 * Guess what? The IOMEGA Clik! drive also needs the
1858 * above fix. It makes nasty clicking noises without
1859 * it, so please don't remove this.
1860 */
1861 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1862 blk_queue_max_sectors(drive->queue, 64);
1863 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1864 }
1865
1866
1867 (void) idefloppy_get_capacity(drive);
1868 idefloppy_add_settings(drive);
1869 }
1870
1871 static void ide_floppy_remove(ide_drive_t *drive)
1872 {
1873 idefloppy_floppy_t *floppy = drive->driver_data;
1874 struct gendisk *g = floppy->disk;
1875
1876 ide_unregister_subdriver(drive, floppy->driver);
1877
1878 del_gendisk(g);
1879
1880 ide_floppy_put(floppy);
1881 }
1882
1883 static void ide_floppy_release(struct kref *kref)
1884 {
1885 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1886 ide_drive_t *drive = floppy->drive;
1887 struct gendisk *g = floppy->disk;
1888
1889 drive->driver_data = NULL;
1890 g->private_data = NULL;
1891 put_disk(g);
1892 kfree(floppy);
1893 }
1894
1895 #ifdef CONFIG_PROC_FS
1896
1897 static int proc_idefloppy_read_capacity
1898 (char *page, char **start, off_t off, int count, int *eof, void *data)
1899 {
1900 ide_drive_t*drive = (ide_drive_t *)data;
1901 int len;
1902
1903 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1904 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1905 }
1906
1907 static ide_proc_entry_t idefloppy_proc[] = {
1908 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
1909 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
1910 { NULL, 0, NULL, NULL }
1911 };
1912
1913 #else
1914
1915 #define idefloppy_proc NULL
1916
1917 #endif /* CONFIG_PROC_FS */
1918
1919 static int ide_floppy_probe(ide_drive_t *);
1920
1921 static ide_driver_t idefloppy_driver = {
1922 .gen_driver = {
1923 .owner = THIS_MODULE,
1924 .name = "ide-floppy",
1925 .bus = &ide_bus_type,
1926 },
1927 .probe = ide_floppy_probe,
1928 .remove = ide_floppy_remove,
1929 .version = IDEFLOPPY_VERSION,
1930 .media = ide_floppy,
1931 .supports_dsc_overlap = 0,
1932 .do_request = idefloppy_do_request,
1933 .end_request = idefloppy_do_end_request,
1934 .error = __ide_error,
1935 .abort = __ide_abort,
1936 .proc = idefloppy_proc,
1937 };
1938
1939 static int idefloppy_open(struct inode *inode, struct file *filp)
1940 {
1941 struct gendisk *disk = inode->i_bdev->bd_disk;
1942 struct ide_floppy_obj *floppy;
1943 ide_drive_t *drive;
1944 idefloppy_pc_t pc;
1945 int ret = 0;
1946
1947 debug_log(KERN_INFO "Reached idefloppy_open\n");
1948
1949 if (!(floppy = ide_floppy_get(disk)))
1950 return -ENXIO;
1951
1952 drive = floppy->drive;
1953
1954 floppy->openers++;
1955
1956 if (floppy->openers == 1) {
1957 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1958 /* Just in case */
1959
1960 idefloppy_create_test_unit_ready_cmd(&pc);
1961 if (idefloppy_queue_pc_tail(drive, &pc)) {
1962 idefloppy_create_start_stop_cmd(&pc, 1);
1963 (void) idefloppy_queue_pc_tail(drive, &pc);
1964 }
1965
1966 if (idefloppy_get_capacity (drive)
1967 && (filp->f_flags & O_NDELAY) == 0
1968 /*
1969 ** Allow O_NDELAY to open a drive without a disk, or with
1970 ** an unreadable disk, so that we can get the format
1971 ** capacity of the drive or begin the format - Sam
1972 */
1973 ) {
1974 ret = -EIO;
1975 goto out_put_floppy;
1976 }
1977
1978 if (floppy->wp && (filp->f_mode & 2)) {
1979 ret = -EROFS;
1980 goto out_put_floppy;
1981 }
1982 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1983 /* IOMEGA Clik! drives do not support lock/unlock commands */
1984 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1985 idefloppy_create_prevent_cmd(&pc, 1);
1986 (void) idefloppy_queue_pc_tail(drive, &pc);
1987 }
1988 check_disk_change(inode->i_bdev);
1989 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1990 ret = -EBUSY;
1991 goto out_put_floppy;
1992 }
1993 return 0;
1994
1995 out_put_floppy:
1996 floppy->openers--;
1997 ide_floppy_put(floppy);
1998 return ret;
1999 }
2000
2001 static int idefloppy_release(struct inode *inode, struct file *filp)
2002 {
2003 struct gendisk *disk = inode->i_bdev->bd_disk;
2004 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2005 ide_drive_t *drive = floppy->drive;
2006 idefloppy_pc_t pc;
2007
2008 debug_log(KERN_INFO "Reached idefloppy_release\n");
2009
2010 if (floppy->openers == 1) {
2011 /* IOMEGA Clik! drives do not support lock/unlock commands */
2012 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2013 idefloppy_create_prevent_cmd(&pc, 0);
2014 (void) idefloppy_queue_pc_tail(drive, &pc);
2015 }
2016
2017 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2018 }
2019
2020 floppy->openers--;
2021
2022 ide_floppy_put(floppy);
2023
2024 return 0;
2025 }
2026
2027 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
2028 {
2029 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2030 ide_drive_t *drive = floppy->drive;
2031
2032 geo->heads = drive->bios_head;
2033 geo->sectors = drive->bios_sect;
2034 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
2035 return 0;
2036 }
2037
2038 static int idefloppy_ioctl(struct inode *inode, struct file *file,
2039 unsigned int cmd, unsigned long arg)
2040 {
2041 struct block_device *bdev = inode->i_bdev;
2042 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2043 ide_drive_t *drive = floppy->drive;
2044 void __user *argp = (void __user *)arg;
2045 int err;
2046 int prevent = (arg) ? 1 : 0;
2047 idefloppy_pc_t pc;
2048
2049 switch (cmd) {
2050 case CDROMEJECT:
2051 prevent = 0;
2052 /* fall through */
2053 case CDROM_LOCKDOOR:
2054 if (floppy->openers > 1)
2055 return -EBUSY;
2056
2057 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2058 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2059 idefloppy_create_prevent_cmd(&pc, prevent);
2060 (void) idefloppy_queue_pc_tail(drive, &pc);
2061 }
2062 if (cmd == CDROMEJECT) {
2063 idefloppy_create_start_stop_cmd(&pc, 2);
2064 (void) idefloppy_queue_pc_tail(drive, &pc);
2065 }
2066 return 0;
2067 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2068 return 0;
2069 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2070 return idefloppy_get_format_capacities(drive, argp);
2071 case IDEFLOPPY_IOCTL_FORMAT_START:
2072
2073 if (!(file->f_mode & 2))
2074 return -EPERM;
2075
2076 if (floppy->openers > 1) {
2077 /* Don't format if someone is using the disk */
2078
2079 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2080 &floppy->flags);
2081 return -EBUSY;
2082 }
2083
2084 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2085
2086 err = idefloppy_begin_format(drive, argp);
2087 if (err)
2088 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2089 return err;
2090 /*
2091 ** Note, the bit will be cleared when the device is
2092 ** closed. This is the cleanest way to handle the
2093 ** situation where the drive does not support
2094 ** format progress reporting.
2095 */
2096 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2097 return idefloppy_get_format_progress(drive, argp);
2098 }
2099 return generic_ide_ioctl(drive, file, bdev, cmd, arg);
2100 }
2101
2102 static int idefloppy_media_changed(struct gendisk *disk)
2103 {
2104 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2105 ide_drive_t *drive = floppy->drive;
2106
2107 /* do not scan partitions twice if this is a removable device */
2108 if (drive->attach) {
2109 drive->attach = 0;
2110 return 0;
2111 }
2112 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2113 }
2114
2115 static int idefloppy_revalidate_disk(struct gendisk *disk)
2116 {
2117 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2118 set_capacity(disk, idefloppy_capacity(floppy->drive));
2119 return 0;
2120 }
2121
2122 static struct block_device_operations idefloppy_ops = {
2123 .owner = THIS_MODULE,
2124 .open = idefloppy_open,
2125 .release = idefloppy_release,
2126 .ioctl = idefloppy_ioctl,
2127 .getgeo = idefloppy_getgeo,
2128 .media_changed = idefloppy_media_changed,
2129 .revalidate_disk= idefloppy_revalidate_disk
2130 };
2131
2132 static int ide_floppy_probe(ide_drive_t *drive)
2133 {
2134 idefloppy_floppy_t *floppy;
2135 struct gendisk *g;
2136
2137 if (!strstr("ide-floppy", drive->driver_req))
2138 goto failed;
2139 if (!drive->present)
2140 goto failed;
2141 if (drive->media != ide_floppy)
2142 goto failed;
2143 if (!idefloppy_identify_device (drive, drive->id)) {
2144 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2145 goto failed;
2146 }
2147 if (drive->scsi) {
2148 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2149 goto failed;
2150 }
2151 if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2152 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2153 goto failed;
2154 }
2155
2156 g = alloc_disk(1 << PARTN_BITS);
2157 if (!g)
2158 goto out_free_floppy;
2159
2160 ide_init_disk(g, drive);
2161
2162 ide_register_subdriver(drive, &idefloppy_driver);
2163
2164 kref_init(&floppy->kref);
2165
2166 floppy->drive = drive;
2167 floppy->driver = &idefloppy_driver;
2168 floppy->disk = g;
2169
2170 g->private_data = &floppy->driver;
2171
2172 drive->driver_data = floppy;
2173
2174 idefloppy_setup (drive, floppy);
2175
2176 g->minors = 1 << PARTN_BITS;
2177 g->driverfs_dev = &drive->gendev;
2178 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2179 g->fops = &idefloppy_ops;
2180 drive->attach = 1;
2181 add_disk(g);
2182 return 0;
2183
2184 out_free_floppy:
2185 kfree(floppy);
2186 failed:
2187 return -ENODEV;
2188 }
2189
2190 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2191
2192 static void __exit idefloppy_exit (void)
2193 {
2194 driver_unregister(&idefloppy_driver.gen_driver);
2195 }
2196
2197 static int __init idefloppy_init(void)
2198 {
2199 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2200 return driver_register(&idefloppy_driver.gen_driver);
2201 }
2202
2203 MODULE_ALIAS("ide:*m-floppy*");
2204 module_init(idefloppy_init);
2205 module_exit(idefloppy_exit);
2206 MODULE_LICENSE("GPL");
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