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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / ide / ide-floppy.c
blob36c0b74a4e45b69dd4e0f5d71671bf5ba3781d83
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 3 /* default delay for ZIP 100 */
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 (bcount) {
665 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
666 idefloppy_write_zeros(drive, bcount);
667 }
668 }
669
670 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
671 {
672 struct request *rq = pc->rq;
673 struct bio *bio = rq->bio;
674
675 while ((bio = rq->bio) != NULL)
676 idefloppy_do_end_request(drive, 1, 0);
677 }
678
679 /*
680 * idefloppy_queue_pc_head generates a new packet command request in front
681 * of the request queue, before the current request, so that it will be
682 * processed immediately, on the next pass through the driver.
683 */
684 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
685 {
686 struct ide_floppy_obj *floppy = drive->driver_data;
687
688 ide_init_drive_cmd(rq);
689 rq->buffer = (char *) pc;
690 rq->flags = REQ_SPECIAL; //rq->cmd = IDEFLOPPY_PC_RQ;
691 rq->rq_disk = floppy->disk;
692 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
693 }
694
695 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
696 {
697 idefloppy_floppy_t *floppy = drive->driver_data;
698
699 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
700 floppy->pc_stack_index=0;
701 return (&floppy->pc_stack[floppy->pc_stack_index++]);
702 }
703
704 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
705 {
706 idefloppy_floppy_t *floppy = drive->driver_data;
707
708 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
709 floppy->rq_stack_index = 0;
710 return (&floppy->rq_stack[floppy->rq_stack_index++]);
711 }
712
713 /*
714 * idefloppy_analyze_error is called on each failed packet command retry
715 * to analyze the request sense.
716 */
717 static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
718 {
719 idefloppy_floppy_t *floppy = drive->driver_data;
720
721 floppy->sense_key = result->sense_key;
722 floppy->asc = result->asc;
723 floppy->ascq = result->ascq;
724 floppy->progress_indication = result->sksv[0] & 0x80 ?
725 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
726 if (floppy->failed_pc)
727 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
728 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
729 result->sense_key, result->asc, result->ascq);
730 else
731 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
732 "ascq = %x\n", result->sense_key,
733 result->asc, result->ascq);
734 }
735
736 static void idefloppy_request_sense_callback (ide_drive_t *drive)
737 {
738 idefloppy_floppy_t *floppy = drive->driver_data;
739
740 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
741
742 if (!floppy->pc->error) {
743 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
744 idefloppy_do_end_request(drive, 1, 0);
745 } else {
746 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
747 idefloppy_do_end_request(drive, 0, 0);
748 }
749 }
750
751 /*
752 * General packet command callback function.
753 */
754 static void idefloppy_pc_callback (ide_drive_t *drive)
755 {
756 idefloppy_floppy_t *floppy = drive->driver_data;
757
758 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
759
760 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
761 }
762
763 /*
764 * idefloppy_init_pc initializes a packet command.
765 */
766 static void idefloppy_init_pc (idefloppy_pc_t *pc)
767 {
768 memset(pc->c, 0, 12);
769 pc->retries = 0;
770 pc->flags = 0;
771 pc->request_transfer = 0;
772 pc->buffer = pc->pc_buffer;
773 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
774 pc->callback = &idefloppy_pc_callback;
775 }
776
777 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
778 {
779 idefloppy_init_pc(pc);
780 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
781 pc->c[4] = 255;
782 pc->request_transfer = 18;
783 pc->callback = &idefloppy_request_sense_callback;
784 }
785
786 /*
787 * idefloppy_retry_pc is called when an error was detected during the
788 * last packet command. We queue a request sense packet command in
789 * the head of the request list.
790 */
791 static void idefloppy_retry_pc (ide_drive_t *drive)
792 {
793 idefloppy_pc_t *pc;
794 struct request *rq;
795 atapi_error_t error;
796
797 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
798 pc = idefloppy_next_pc_storage(drive);
799 rq = idefloppy_next_rq_storage(drive);
800 idefloppy_create_request_sense_cmd(pc);
801 idefloppy_queue_pc_head(drive, pc, rq);
802 }
803
804 /*
805 * idefloppy_pc_intr is the usual interrupt handler which will be called
806 * during a packet command.
807 */
808 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
809 {
810 idefloppy_floppy_t *floppy = drive->driver_data;
811 atapi_status_t status;
812 atapi_bcount_t bcount;
813 atapi_ireason_t ireason;
814 idefloppy_pc_t *pc = floppy->pc;
815 struct request *rq = pc->rq;
816 unsigned int temp;
817
818 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
819 __FUNCTION__);
820
821 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
822 if (HWIF(drive)->ide_dma_end(drive)) {
823 set_bit(PC_DMA_ERROR, &pc->flags);
824 } else {
825 pc->actually_transferred = pc->request_transfer;
826 idefloppy_update_buffers(drive, pc);
827 }
828 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
829 }
830
831 /* Clear the interrupt */
832 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
833
834 if (!status.b.drq) { /* No more interrupts */
835 debug_log(KERN_INFO "Packet command completed, %d bytes "
836 "transferred\n", pc->actually_transferred);
837 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
838
839 local_irq_enable();
840
841 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) {
842 /* Error detected */
843 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
844 drive->name);
845 rq->errors++;
846 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
847 printk(KERN_ERR "ide-floppy: I/O error in "
848 "request sense command\n");
849 return ide_do_reset(drive);
850 }
851 /* Retry operation */
852 idefloppy_retry_pc(drive);
853 /* queued, but not started */
854 return ide_stopped;
855 }
856 pc->error = 0;
857 if (floppy->failed_pc == pc)
858 floppy->failed_pc = NULL;
859 /* Command finished - Call the callback function */
860 pc->callback(drive);
861 return ide_stopped;
862 }
863
864 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
865 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
866 "more interrupts in DMA mode\n");
867 (void)__ide_dma_off(drive);
868 return ide_do_reset(drive);
869 }
870
871 /* Get the number of bytes to transfer */
872 bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
873 bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
874 /* on this interrupt */
875 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
876
877 if (ireason.b.cod) {
878 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
879 return ide_do_reset(drive);
880 }
881 if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
882 /* Hopefully, we will never get here */
883 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
884 ireason.b.io ? "Write":"Read");
885 printk(KERN_ERR "but the floppy wants us to %s !\n",
886 ireason.b.io ? "Read":"Write");
887 return ide_do_reset(drive);
888 }
889 if (!test_bit(PC_WRITING, &pc->flags)) {
890 /* Reading - Check that we have enough space */
891 temp = pc->actually_transferred + bcount.all;
892 if (temp > pc->request_transfer) {
893 if (temp > pc->buffer_size) {
894 printk(KERN_ERR "ide-floppy: The floppy wants "
895 "to send us more data than expected "
896 "- discarding data\n");
897 idefloppy_discard_data(drive,bcount.all);
898 if (HWGROUP(drive)->handler != NULL)
899 BUG();
900 ide_set_handler(drive,
901 &idefloppy_pc_intr,
902 IDEFLOPPY_WAIT_CMD,
903 NULL);
904 return ide_started;
905 }
906 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
907 "send us more data than expected - "
908 "allowing transfer\n");
909 }
910 }
911 if (test_bit(PC_WRITING, &pc->flags)) {
912 if (pc->buffer != NULL)
913 /* Write the current buffer */
914 HWIF(drive)->atapi_output_bytes(drive,
915 pc->current_position,
916 bcount.all);
917 else
918 idefloppy_output_buffers(drive, pc, bcount.all);
919 } else {
920 if (pc->buffer != NULL)
921 /* Read the current buffer */
922 HWIF(drive)->atapi_input_bytes(drive,
923 pc->current_position,
924 bcount.all);
925 else
926 idefloppy_input_buffers(drive, pc, bcount.all);
927 }
928 /* Update the current position */
929 pc->actually_transferred += bcount.all;
930 pc->current_position += bcount.all;
931
932 if (HWGROUP(drive)->handler != NULL)
933 BUG();
934 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */
935 return ide_started;
936 }
937
938 /*
939 * This is the original routine that did the packet transfer.
940 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
941 * for that drive below. The algorithm is chosen based on drive type
942 */
943 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
944 {
945 ide_startstop_t startstop;
946 idefloppy_floppy_t *floppy = drive->driver_data;
947 atapi_ireason_t ireason;
948
949 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
950 printk(KERN_ERR "ide-floppy: Strange, packet command "
951 "initiated yet DRQ isn't asserted\n");
952 return startstop;
953 }
954 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
955 if (!ireason.b.cod || ireason.b.io) {
956 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
957 "issuing a packet command\n");
958 return ide_do_reset(drive);
959 }
960 if (HWGROUP(drive)->handler != NULL)
961 BUG();
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 if (HWGROUP(drive)->handler != NULL)
1018 BUG();
1019 ide_set_handler(drive,
1020 &idefloppy_pc_intr, /* service routine for packet command */
1021 floppy->ticks, /* wait this long before "failing" */
1022 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */
1023 return ide_started;
1024 }
1025
1026 /**
1027 * idefloppy_should_report_error()
1028 *
1029 * Supresses error messages resulting from Medium not present
1030 */
1031 static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1032 {
1033 if (floppy->sense_key == 0x02 &&
1034 floppy->asc == 0x3a &&
1035 floppy->ascq == 0x00)
1036 return 0;
1037 return 1;
1038 }
1039
1040 /*
1041 * Issue a packet command
1042 */
1043 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1044 {
1045 idefloppy_floppy_t *floppy = drive->driver_data;
1046 ide_hwif_t *hwif = drive->hwif;
1047 atapi_feature_t feature;
1048 atapi_bcount_t bcount;
1049 ide_handler_t *pkt_xfer_routine;
1050
1051 #if IDEFLOPPY_DEBUG_BUGS
1052 if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD &&
1053 pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
1054 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - "
1055 "Two request sense in serial were issued\n");
1056 }
1057 #endif /* IDEFLOPPY_DEBUG_BUGS */
1058
1059 if (floppy->failed_pc == NULL &&
1060 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1061 floppy->failed_pc = pc;
1062 /* Set the current packet command */
1063 floppy->pc = pc;
1064
1065 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1066 test_bit(PC_ABORT, &pc->flags)) {
1067 /*
1068 * We will "abort" retrying a packet command in case
1069 * a legitimate error code was received.
1070 */
1071 if (!test_bit(PC_ABORT, &pc->flags)) {
1072 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1073 if (idefloppy_should_report_error(floppy))
1074 printk(KERN_ERR "ide-floppy: %s: I/O error, "
1075 "pc = %2x, key = %2x, "
1076 "asc = %2x, ascq = %2x\n",
1077 drive->name, pc->c[0],
1078 floppy->sense_key,
1079 floppy->asc, floppy->ascq);
1080 }
1081 /* Giving up */
1082 pc->error = IDEFLOPPY_ERROR_GENERAL;
1083 }
1084 floppy->failed_pc = NULL;
1085 pc->callback(drive);
1086 return ide_stopped;
1087 }
1088
1089 debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1090
1091 pc->retries++;
1092 /* We haven't transferred any data yet */
1093 pc->actually_transferred = 0;
1094 pc->current_position = pc->buffer;
1095 bcount.all = min(pc->request_transfer, 63 * 1024);
1096
1097 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) {
1098 (void)__ide_dma_off(drive);
1099 }
1100 feature.all = 0;
1101
1102 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
1103 feature.b.dma = !hwif->dma_setup(drive);
1104
1105 if (IDE_CONTROL_REG)
1106 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1107 /* Use PIO/DMA */
1108 HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
1109 HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
1110 HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
1111 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1112
1113 if (feature.b.dma) { /* Begin DMA, if necessary */
1114 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1115 hwif->dma_start(drive);
1116 }
1117
1118 /* Can we transfer the packet when we get the interrupt or wait? */
1119 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1120 /* wait */
1121 pkt_xfer_routine = &idefloppy_transfer_pc1;
1122 } else {
1123 /* immediate */
1124 pkt_xfer_routine = &idefloppy_transfer_pc;
1125 }
1126
1127 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1128 /* Issue the packet command */
1129 ide_execute_command(drive, WIN_PACKETCMD,
1130 pkt_xfer_routine,
1131 IDEFLOPPY_WAIT_CMD,
1132 NULL);
1133 return ide_started;
1134 } else {
1135 /* Issue the packet command */
1136 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1137 return (*pkt_xfer_routine) (drive);
1138 }
1139 }
1140
1141 static void idefloppy_rw_callback (ide_drive_t *drive)
1142 {
1143 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1144
1145 idefloppy_do_end_request(drive, 1, 0);
1146 return;
1147 }
1148
1149 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1150 {
1151 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1152 "prevent = %d\n", prevent);
1153
1154 idefloppy_init_pc(pc);
1155 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1156 pc->c[4] = prevent;
1157 }
1158
1159 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1160 {
1161 idefloppy_init_pc(pc);
1162 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1163 pc->c[7] = 255;
1164 pc->c[8] = 255;
1165 pc->request_transfer = 255;
1166 }
1167
1168 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1169 int flags)
1170 {
1171 idefloppy_init_pc(pc);
1172 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1173 pc->c[1] = 0x17;
1174
1175 memset(pc->buffer, 0, 12);
1176 pc->buffer[1] = 0xA2;
1177 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1178
1179 if (flags & 1) /* Verify bit on... */
1180 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */
1181 pc->buffer[3] = 8;
1182
1183 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1184 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1185 pc->buffer_size=12;
1186 set_bit(PC_WRITING, &pc->flags);
1187 }
1188
1189 /*
1190 * A mode sense command is used to "sense" floppy parameters.
1191 */
1192 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1193 {
1194 u16 length = sizeof(idefloppy_mode_parameter_header_t);
1195
1196 idefloppy_init_pc(pc);
1197 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1198 pc->c[1] = 0;
1199 pc->c[2] = page_code + (type << 6);
1200
1201 switch (page_code) {
1202 case IDEFLOPPY_CAPABILITIES_PAGE:
1203 length += 12;
1204 break;
1205 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1206 length += 32;
1207 break;
1208 default:
1209 printk(KERN_ERR "ide-floppy: unsupported page code "
1210 "in create_mode_sense_cmd\n");
1211 }
1212 put_unaligned(htons(length), (u16 *) &pc->c[7]);
1213 pc->request_transfer = length;
1214 }
1215
1216 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1217 {
1218 idefloppy_init_pc(pc);
1219 pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1220 pc->c[4] = start;
1221 }
1222
1223 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1224 {
1225 idefloppy_init_pc(pc);
1226 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1227 }
1228
1229 static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1230 {
1231 int block = sector / floppy->bs_factor;
1232 int blocks = rq->nr_sectors / floppy->bs_factor;
1233 int cmd = rq_data_dir(rq);
1234
1235 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1236 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1237 block, blocks);
1238
1239 idefloppy_init_pc(pc);
1240 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1241 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1242 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1243 } else {
1244 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1245 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1246 }
1247 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1248 pc->callback = &idefloppy_rw_callback;
1249 pc->rq = rq;
1250 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
1251 if (rq->flags & REQ_RW)
1252 set_bit(PC_WRITING, &pc->flags);
1253 pc->buffer = NULL;
1254 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1255 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1256 }
1257
1258 static int
1259 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1260 {
1261 /*
1262 * just support eject for now, it would not be hard to make the
1263 * REQ_BLOCK_PC support fully-featured
1264 */
1265 if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD)
1266 return 1;
1267
1268 idefloppy_init_pc(pc);
1269 memcpy(pc->c, rq->cmd, sizeof(pc->c));
1270 return 0;
1271 }
1272
1273 /*
1274 * idefloppy_do_request is our request handling function.
1275 */
1276 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1277 {
1278 idefloppy_floppy_t *floppy = drive->driver_data;
1279 idefloppy_pc_t *pc;
1280 unsigned long block = (unsigned long)block_s;
1281
1282 debug_log(KERN_INFO "rq_status: %d, dev: %s, flags: %lx, errors: %d\n",
1283 rq->rq_status,
1284 rq->rq_disk ? rq->rq_disk->disk_name ? "?",
1285 rq->flags, rq->errors);
1286 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1287 "current_nr_sectors: %d\n", (long)rq->sector,
1288 rq->nr_sectors, rq->current_nr_sectors);
1289
1290 if (rq->errors >= ERROR_MAX) {
1291 if (floppy->failed_pc != NULL) {
1292 if (idefloppy_should_report_error(floppy))
1293 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1294 " key = %2x, asc = %2x, ascq = %2x\n",
1295 drive->name, floppy->failed_pc->c[0],
1296 floppy->sense_key, floppy->asc, floppy->ascq);
1297 }
1298 else
1299 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1300 drive->name);
1301 idefloppy_do_end_request(drive, 0, 0);
1302 return ide_stopped;
1303 }
1304 if (rq->flags & REQ_CMD) {
1305 if (((long)rq->sector % floppy->bs_factor) ||
1306 (rq->nr_sectors % floppy->bs_factor)) {
1307 printk("%s: unsupported r/w request size\n",
1308 drive->name);
1309 idefloppy_do_end_request(drive, 0, 0);
1310 return ide_stopped;
1311 }
1312 pc = idefloppy_next_pc_storage(drive);
1313 idefloppy_create_rw_cmd(floppy, pc, rq, block);
1314 } else if (rq->flags & REQ_SPECIAL) {
1315 pc = (idefloppy_pc_t *) rq->buffer;
1316 } else if (rq->flags & REQ_BLOCK_PC) {
1317 pc = idefloppy_next_pc_storage(drive);
1318 if (idefloppy_blockpc_cmd(floppy, pc, rq)) {
1319 idefloppy_do_end_request(drive, 0, 0);
1320 return ide_stopped;
1321 }
1322 } else {
1323 blk_dump_rq_flags(rq,
1324 "ide-floppy: unsupported command in queue");
1325 idefloppy_do_end_request(drive, 0, 0);
1326 return ide_stopped;
1327 }
1328
1329 pc->rq = rq;
1330 return idefloppy_issue_pc(drive, pc);
1331 }
1332
1333 /*
1334 * idefloppy_queue_pc_tail adds a special packet command request to the
1335 * tail of the request queue, and waits for it to be serviced.
1336 */
1337 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1338 {
1339 struct ide_floppy_obj *floppy = drive->driver_data;
1340 struct request rq;
1341
1342 ide_init_drive_cmd (&rq);
1343 rq.buffer = (char *) pc;
1344 rq.flags = REQ_SPECIAL; // rq.cmd = IDEFLOPPY_PC_RQ;
1345 rq.rq_disk = floppy->disk;
1346
1347 return ide_do_drive_cmd(drive, &rq, ide_wait);
1348 }
1349
1350 /*
1351 * Look at the flexible disk page parameters. We will ignore the CHS
1352 * capacity parameters and use the LBA parameters instead.
1353 */
1354 static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1355 {
1356 idefloppy_floppy_t *floppy = drive->driver_data;
1357 idefloppy_pc_t pc;
1358 idefloppy_mode_parameter_header_t *header;
1359 idefloppy_flexible_disk_page_t *page;
1360 int capacity, lba_capacity;
1361
1362 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1363 if (idefloppy_queue_pc_tail(drive,&pc)) {
1364 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1365 "page parameters\n");
1366 return 1;
1367 }
1368 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1369 floppy->wp = header->wp;
1370 set_disk_ro(floppy->disk, floppy->wp);
1371 page = (idefloppy_flexible_disk_page_t *) (header + 1);
1372
1373 page->transfer_rate = ntohs(page->transfer_rate);
1374 page->sector_size = ntohs(page->sector_size);
1375 page->cyls = ntohs(page->cyls);
1376 page->rpm = ntohs(page->rpm);
1377 capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1378 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1379 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1380 "%d sector size, %d rpm\n",
1381 drive->name, capacity / 1024, page->cyls,
1382 page->heads, page->sectors,
1383 page->transfer_rate / 8, page->sector_size, page->rpm);
1384
1385 floppy->flexible_disk_page = *page;
1386 drive->bios_cyl = page->cyls;
1387 drive->bios_head = page->heads;
1388 drive->bios_sect = page->sectors;
1389 lba_capacity = floppy->blocks * floppy->block_size;
1390 if (capacity < lba_capacity) {
1391 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1392 "bytes, but the drive only handles %d\n",
1393 drive->name, lba_capacity, capacity);
1394 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1395 }
1396 return 0;
1397 }
1398
1399 static int idefloppy_get_capability_page(ide_drive_t *drive)
1400 {
1401 idefloppy_floppy_t *floppy = drive->driver_data;
1402 idefloppy_pc_t pc;
1403 idefloppy_mode_parameter_header_t *header;
1404 idefloppy_capabilities_page_t *page;
1405
1406 floppy->srfp = 0;
1407 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1408 MODE_SENSE_CURRENT);
1409
1410 set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1411 if (idefloppy_queue_pc_tail(drive,&pc)) {
1412 return 1;
1413 }
1414
1415 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1416 page= (idefloppy_capabilities_page_t *)(header+1);
1417 floppy->srfp = page->srfp;
1418 return (0);
1419 }
1420
1421 /*
1422 * Determine if a media is present in the floppy drive, and if so,
1423 * its LBA capacity.
1424 */
1425 static int idefloppy_get_capacity (ide_drive_t *drive)
1426 {
1427 idefloppy_floppy_t *floppy = drive->driver_data;
1428 idefloppy_pc_t pc;
1429 idefloppy_capacity_header_t *header;
1430 idefloppy_capacity_descriptor_t *descriptor;
1431 int i, descriptors, rc = 1, blocks, length;
1432
1433 drive->bios_cyl = 0;
1434 drive->bios_head = drive->bios_sect = 0;
1435 floppy->blocks = floppy->bs_factor = 0;
1436 set_capacity(floppy->disk, 0);
1437
1438 idefloppy_create_read_capacity_cmd(&pc);
1439 if (idefloppy_queue_pc_tail(drive, &pc)) {
1440 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1441 return 1;
1442 }
1443 header = (idefloppy_capacity_header_t *) pc.buffer;
1444 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1445 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1446
1447 for (i = 0; i < descriptors; i++, descriptor++) {
1448 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1449 length = descriptor->length = ntohs(descriptor->length);
1450
1451 if (!i)
1452 {
1453 switch (descriptor->dc) {
1454 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1455 case CAPACITY_UNFORMATTED:
1456 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1457 /*
1458 * If it is not a clik drive, break out
1459 * (maintains previous driver behaviour)
1460 */
1461 break;
1462 case CAPACITY_CURRENT:
1463 /* Normal Zip/LS-120 disks */
1464 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1465 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1466 "sector size\n", drive->name,
1467 blocks * length / 1024, blocks, length);
1468 floppy->capacity = *descriptor;
1469 if (!length || length % 512) {
1470 printk(KERN_NOTICE "%s: %d bytes block size "
1471 "not supported\n", drive->name, length);
1472 } else {
1473 floppy->blocks = blocks;
1474 floppy->block_size = length;
1475 if ((floppy->bs_factor = length / 512) != 1)
1476 printk(KERN_NOTICE "%s: warning: non "
1477 "512 bytes block size not "
1478 "fully supported\n",
1479 drive->name);
1480 rc = 0;
1481 }
1482 break;
1483 case CAPACITY_NO_CARTRIDGE:
1484 /*
1485 * This is a KERN_ERR so it appears on screen
1486 * for the user to see
1487 */
1488 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1489 break;
1490 case CAPACITY_INVALID:
1491 printk(KERN_ERR "%s: Invalid capacity for disk "
1492 "in drive\n", drive->name);
1493 break;
1494 }
1495 }
1496 if (!i) {
1497 debug_log( "Descriptor 0 Code: %d\n",
1498 descriptor->dc);
1499 }
1500 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1501 "sector size\n", i, blocks * length / 1024, blocks,
1502 length);
1503 }
1504
1505 /* Clik! disk does not support get_flexible_disk_page */
1506 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1507 (void) idefloppy_get_flexible_disk_page(drive);
1508 }
1509
1510 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1511 return rc;
1512 }
1513
1514 /*
1515 ** Obtain the list of formattable capacities.
1516 ** Very similar to idefloppy_get_capacity, except that we push the capacity
1517 ** descriptors to userland, instead of our own structures.
1518 **
1519 ** Userland gives us the following structure:
1520 **
1521 ** struct idefloppy_format_capacities {
1522 ** int nformats;
1523 ** struct {
1524 ** int nblocks;
1525 ** int blocksize;
1526 ** } formats[];
1527 ** } ;
1528 **
1529 ** userland initializes nformats to the number of allocated formats[]
1530 ** records. On exit we set nformats to the number of records we've
1531 ** actually initialized.
1532 **
1533 */
1534
1535 static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1536 {
1537 idefloppy_pc_t pc;
1538 idefloppy_capacity_header_t *header;
1539 idefloppy_capacity_descriptor_t *descriptor;
1540 int i, descriptors, blocks, length;
1541 int u_array_size;
1542 int u_index;
1543 int __user *argp;
1544
1545 if (get_user(u_array_size, arg))
1546 return (-EFAULT);
1547
1548 if (u_array_size <= 0)
1549 return (-EINVAL);
1550
1551 idefloppy_create_read_capacity_cmd(&pc);
1552 if (idefloppy_queue_pc_tail(drive, &pc)) {
1553 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1554 return (-EIO);
1555 }
1556 header = (idefloppy_capacity_header_t *) pc.buffer;
1557 descriptors = header->length /
1558 sizeof(idefloppy_capacity_descriptor_t);
1559 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1560
1561 u_index = 0;
1562 argp = arg + 1;
1563
1564 /*
1565 ** We always skip the first capacity descriptor. That's the
1566 ** current capacity. We are interested in the remaining descriptors,
1567 ** the formattable capacities.
1568 */
1569
1570 for (i=0; i<descriptors; i++, descriptor++) {
1571 if (u_index >= u_array_size)
1572 break; /* User-supplied buffer too small */
1573 if (i == 0)
1574 continue; /* Skip the first descriptor */
1575
1576 blocks = ntohl(descriptor->blocks);
1577 length = ntohs(descriptor->length);
1578
1579 if (put_user(blocks, argp))
1580 return(-EFAULT);
1581 ++argp;
1582
1583 if (put_user(length, argp))
1584 return (-EFAULT);
1585 ++argp;
1586
1587 ++u_index;
1588 }
1589
1590 if (put_user(u_index, arg))
1591 return (-EFAULT);
1592 return (0);
1593 }
1594
1595 /*
1596 ** Send ATAPI_FORMAT_UNIT to the drive.
1597 **
1598 ** Userland gives us the following structure:
1599 **
1600 ** struct idefloppy_format_command {
1601 ** int nblocks;
1602 ** int blocksize;
1603 ** int flags;
1604 ** } ;
1605 **
1606 ** flags is a bitmask, currently, the only defined flag is:
1607 **
1608 ** 0x01 - verify media after format.
1609 */
1610
1611 static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1612 {
1613 int blocks;
1614 int length;
1615 int flags;
1616 idefloppy_pc_t pc;
1617
1618 if (get_user(blocks, arg) ||
1619 get_user(length, arg+1) ||
1620 get_user(flags, arg+2)) {
1621 return (-EFAULT);
1622 }
1623
1624 /* Get the SFRP bit */
1625 (void) idefloppy_get_capability_page(drive);
1626 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1627 if (idefloppy_queue_pc_tail(drive, &pc)) {
1628 return (-EIO);
1629 }
1630
1631 return (0);
1632 }
1633
1634 /*
1635 ** Get ATAPI_FORMAT_UNIT progress indication.
1636 **
1637 ** Userland gives a pointer to an int. The int is set to a progresss
1638 ** indicator 0-65536, with 65536=100%.
1639 **
1640 ** If the drive does not support format progress indication, we just check
1641 ** the dsc bit, and return either 0 or 65536.
1642 */
1643
1644 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1645 {
1646 idefloppy_floppy_t *floppy = drive->driver_data;
1647 idefloppy_pc_t pc;
1648 int progress_indication = 0x10000;
1649
1650 if (floppy->srfp) {
1651 idefloppy_create_request_sense_cmd(&pc);
1652 if (idefloppy_queue_pc_tail(drive, &pc)) {
1653 return (-EIO);
1654 }
1655
1656 if (floppy->sense_key == 2 &&
1657 floppy->asc == 4 &&
1658 floppy->ascq == 4) {
1659 progress_indication = floppy->progress_indication;
1660 }
1661 /* Else assume format_unit has finished, and we're
1662 ** at 0x10000 */
1663 } else {
1664 atapi_status_t status;
1665 unsigned long flags;
1666
1667 local_irq_save(flags);
1668 status.all = HWIF(drive)->INB(IDE_STATUS_REG);
1669 local_irq_restore(flags);
1670
1671 progress_indication = !status.b.dsc ? 0 : 0x10000;
1672 }
1673 if (put_user(progress_indication, arg))
1674 return (-EFAULT);
1675
1676 return (0);
1677 }
1678
1679 /*
1680 * Return the current floppy capacity.
1681 */
1682 static sector_t idefloppy_capacity (ide_drive_t *drive)
1683 {
1684 idefloppy_floppy_t *floppy = drive->driver_data;
1685 unsigned long capacity = floppy->blocks * floppy->bs_factor;
1686
1687 return capacity;
1688 }
1689
1690 /*
1691 * idefloppy_identify_device checks if we can support a drive,
1692 * based on the ATAPI IDENTIFY command results.
1693 */
1694 static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1695 {
1696 struct idefloppy_id_gcw gcw;
1697 #if IDEFLOPPY_DEBUG_INFO
1698 u16 mask,i;
1699 char buffer[80];
1700 #endif /* IDEFLOPPY_DEBUG_INFO */
1701
1702 *((u16 *) &gcw) = id->config;
1703
1704 #ifdef CONFIG_PPC
1705 /* kludge for Apple PowerBook internal zip */
1706 if ((gcw.device_type == 5) &&
1707 !strstr(id->model, "CD-ROM") &&
1708 strstr(id->model, "ZIP"))
1709 gcw.device_type = 0;
1710 #endif
1711
1712 #if IDEFLOPPY_DEBUG_INFO
1713 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1714 switch (gcw.protocol) {
1715 case 0: case 1: sprintf(buffer, "ATA");break;
1716 case 2: sprintf(buffer, "ATAPI");break;
1717 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1718 }
1719 printk(KERN_INFO "Protocol Type: %s\n", buffer);
1720 switch (gcw.device_type) {
1721 case 0: sprintf(buffer, "Direct-access Device");break;
1722 case 1: sprintf(buffer, "Streaming Tape Device");break;
1723 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1724 case 5: sprintf(buffer, "CD-ROM Device");break;
1725 case 6: sprintf(buffer, "Reserved");
1726 case 7: sprintf(buffer, "Optical memory Device");break;
1727 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1728 default: sprintf(buffer, "Reserved");
1729 }
1730 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1731 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1732 switch (gcw.drq_type) {
1733 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1734 case 1: sprintf(buffer, "Interrupt DRQ");break;
1735 case 2: sprintf(buffer, "Accelerated DRQ");break;
1736 case 3: sprintf(buffer, "Reserved");break;
1737 }
1738 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1739 switch (gcw.packet_size) {
1740 case 0: sprintf(buffer, "12 bytes");break;
1741 case 1: sprintf(buffer, "16 bytes");break;
1742 default: sprintf(buffer, "Reserved");break;
1743 }
1744 printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1745 printk(KERN_INFO "Model: %.40s\n",id->model);
1746 printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1747 printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1748 printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1749 printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1750 printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1751 printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1752 printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1753 printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1754 printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1755 printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1756 printk(KERN_INFO "Single Word DMA supported modes:\n");
1757 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1758 if (id->dma_1word & mask)
1759 printk(KERN_INFO " Mode %d%s\n", i,
1760 (id->dma_1word & (mask << 8)) ? " (active)" : "");
1761 }
1762 printk(KERN_INFO "Multi Word DMA supported modes:\n");
1763 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1764 if (id->dma_mword & mask)
1765 printk(KERN_INFO " Mode %d%s\n", i,
1766 (id->dma_mword & (mask << 8)) ? " (active)" : "");
1767 }
1768 if (id->field_valid & 0x0002) {
1769 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1770 id->eide_pio_modes & 1 ? "Mode 3":"None");
1771 if (id->eide_dma_min == 0)
1772 sprintf(buffer, "Not supported");
1773 else
1774 sprintf(buffer, "%d ns",id->eide_dma_min);
1775 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1776 if (id->eide_dma_time == 0)
1777 sprintf(buffer, "Not supported");
1778 else
1779 sprintf(buffer, "%d ns",id->eide_dma_time);
1780 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1781 if (id->eide_pio == 0)
1782 sprintf(buffer, "Not supported");
1783 else
1784 sprintf(buffer, "%d ns",id->eide_pio);
1785 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1786 buffer);
1787 if (id->eide_pio_iordy == 0)
1788 sprintf(buffer, "Not supported");
1789 else
1790 sprintf(buffer, "%d ns",id->eide_pio_iordy);
1791 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1792 } else
1793 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1794 #endif /* IDEFLOPPY_DEBUG_INFO */
1795
1796 if (gcw.protocol != 2)
1797 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1798 else if (gcw.device_type != 0)
1799 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1800 else if (!gcw.removable)
1801 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1802 else if (gcw.drq_type == 3) {
1803 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1804 } else if (gcw.packet_size != 0) {
1805 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1806 } else
1807 return 1;
1808 return 0;
1809 }
1810
1811 static void idefloppy_add_settings(ide_drive_t *drive)
1812 {
1813 idefloppy_floppy_t *floppy = drive->driver_data;
1814
1815 /*
1816 * drive setting name read/write ioctl ioctl data type min max mul_factor div_factor data pointer set function
1817 */
1818 ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
1819 ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
1820 ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
1821 ide_add_setting(drive, "ticks", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL);
1822 }
1823
1824 /*
1825 * Driver initialization.
1826 */
1827 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1828 {
1829 struct idefloppy_id_gcw gcw;
1830
1831 *((u16 *) &gcw) = drive->id->config;
1832 floppy->pc = floppy->pc_stack;
1833 if (gcw.drq_type == 1)
1834 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1835 /*
1836 * We used to check revisions here. At this point however
1837 * I'm giving up. Just assume they are all broken, its easier.
1838 *
1839 * The actual reason for the workarounds was likely
1840 * a driver bug after all rather than a firmware bug,
1841 * and the workaround below used to hide it. It should
1842 * be fixed as of version 1.9, but to be on the safe side
1843 * we'll leave the limitation below for the 2.2.x tree.
1844 */
1845
1846 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1847 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1848 /* This value will be visible in the /proc/ide/hdx/settings */
1849 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1850 blk_queue_max_sectors(drive->queue, 64);
1851 }
1852
1853 /*
1854 * Guess what? The IOMEGA Clik! drive also needs the
1855 * above fix. It makes nasty clicking noises without
1856 * it, so please don't remove this.
1857 */
1858 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1859 blk_queue_max_sectors(drive->queue, 64);
1860 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1861 }
1862
1863
1864 (void) idefloppy_get_capacity(drive);
1865 idefloppy_add_settings(drive);
1866 }
1867
1868 static int idefloppy_cleanup (ide_drive_t *drive)
1869 {
1870 idefloppy_floppy_t *floppy = drive->driver_data;
1871 struct gendisk *g = floppy->disk;
1872
1873 if (ide_unregister_subdriver(drive))
1874 return 1;
1875
1876 del_gendisk(g);
1877
1878 ide_floppy_put(floppy);
1879
1880 return 0;
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 idefloppy_attach(ide_drive_t *drive);
1920
1921 /*
1922 * IDE subdriver functions, registered with ide.c
1923 */
1924 static ide_driver_t idefloppy_driver = {
1925 .owner = THIS_MODULE,
1926 .name = "ide-floppy",
1927 .version = IDEFLOPPY_VERSION,
1928 .media = ide_floppy,
1929 .busy = 0,
1930 .supports_dsc_overlap = 0,
1931 .cleanup = idefloppy_cleanup,
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 .attach = idefloppy_attach,
1938 .drives = LIST_HEAD_INIT(idefloppy_driver.drives),
1939 };
1940
1941 static int idefloppy_open(struct inode *inode, struct file *filp)
1942 {
1943 struct gendisk *disk = inode->i_bdev->bd_disk;
1944 struct ide_floppy_obj *floppy;
1945 ide_drive_t *drive;
1946 idefloppy_pc_t pc;
1947 int ret = 0;
1948
1949 debug_log(KERN_INFO "Reached idefloppy_open\n");
1950
1951 if (!(floppy = ide_floppy_get(disk)))
1952 return -ENXIO;
1953
1954 drive = floppy->drive;
1955
1956 drive->usage++;
1957
1958 if (drive->usage == 1) {
1959 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1960 /* Just in case */
1961
1962 idefloppy_create_test_unit_ready_cmd(&pc);
1963 if (idefloppy_queue_pc_tail(drive, &pc)) {
1964 idefloppy_create_start_stop_cmd(&pc, 1);
1965 (void) idefloppy_queue_pc_tail(drive, &pc);
1966 }
1967
1968 if (idefloppy_get_capacity (drive)
1969 && (filp->f_flags & O_NDELAY) == 0
1970 /*
1971 ** Allow O_NDELAY to open a drive without a disk, or with
1972 ** an unreadable disk, so that we can get the format
1973 ** capacity of the drive or begin the format - Sam
1974 */
1975 ) {
1976 drive->usage--;
1977 ret = -EIO;
1978 goto out_put_floppy;
1979 }
1980
1981 if (floppy->wp && (filp->f_mode & 2)) {
1982 drive->usage--;
1983 ret = -EROFS;
1984 goto out_put_floppy;
1985 }
1986 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1987 /* IOMEGA Clik! drives do not support lock/unlock commands */
1988 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1989 idefloppy_create_prevent_cmd(&pc, 1);
1990 (void) idefloppy_queue_pc_tail(drive, &pc);
1991 }
1992 check_disk_change(inode->i_bdev);
1993 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1994 drive->usage--;
1995 ret = -EBUSY;
1996 goto out_put_floppy;
1997 }
1998 return 0;
1999
2000 out_put_floppy:
2001 ide_floppy_put(floppy);
2002 return ret;
2003 }
2004
2005 static int idefloppy_release(struct inode *inode, struct file *filp)
2006 {
2007 struct gendisk *disk = inode->i_bdev->bd_disk;
2008 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2009 ide_drive_t *drive = floppy->drive;
2010 idefloppy_pc_t pc;
2011
2012 debug_log(KERN_INFO "Reached idefloppy_release\n");
2013
2014 if (drive->usage == 1) {
2015 /* IOMEGA Clik! drives do not support lock/unlock commands */
2016 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2017 idefloppy_create_prevent_cmd(&pc, 0);
2018 (void) idefloppy_queue_pc_tail(drive, &pc);
2019 }
2020
2021 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2022 }
2023 drive->usage--;
2024
2025 ide_floppy_put(floppy);
2026
2027 return 0;
2028 }
2029
2030 static int idefloppy_ioctl(struct inode *inode, struct file *file,
2031 unsigned int cmd, unsigned long arg)
2032 {
2033 struct block_device *bdev = inode->i_bdev;
2034 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2035 ide_drive_t *drive = floppy->drive;
2036 void __user *argp = (void __user *)arg;
2037 int err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
2038 int prevent = (arg) ? 1 : 0;
2039 idefloppy_pc_t pc;
2040 if (err != -EINVAL)
2041 return err;
2042
2043 switch (cmd) {
2044 case CDROMEJECT:
2045 prevent = 0;
2046 /* fall through */
2047 case CDROM_LOCKDOOR:
2048 if (drive->usage > 1)
2049 return -EBUSY;
2050
2051 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2052 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2053 idefloppy_create_prevent_cmd(&pc, prevent);
2054 (void) idefloppy_queue_pc_tail(drive, &pc);
2055 }
2056 if (cmd == CDROMEJECT) {
2057 idefloppy_create_start_stop_cmd(&pc, 2);
2058 (void) idefloppy_queue_pc_tail(drive, &pc);
2059 }
2060 return 0;
2061 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2062 return 0;
2063 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2064 return idefloppy_get_format_capacities(drive, argp);
2065 case IDEFLOPPY_IOCTL_FORMAT_START:
2066
2067 if (!(file->f_mode & 2))
2068 return -EPERM;
2069
2070 if (drive->usage > 1) {
2071 /* Don't format if someone is using the disk */
2072
2073 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2074 &floppy->flags);
2075 return -EBUSY;
2076 }
2077
2078 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2079
2080 err = idefloppy_begin_format(drive, argp);
2081 if (err)
2082 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2083 return err;
2084 /*
2085 ** Note, the bit will be cleared when the device is
2086 ** closed. This is the cleanest way to handle the
2087 ** situation where the drive does not support
2088 ** format progress reporting.
2089 */
2090 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2091 return idefloppy_get_format_progress(drive, argp);
2092 }
2093 return -EINVAL;
2094 }
2095
2096 static int idefloppy_media_changed(struct gendisk *disk)
2097 {
2098 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2099 ide_drive_t *drive = floppy->drive;
2100
2101 /* do not scan partitions twice if this is a removable device */
2102 if (drive->attach) {
2103 drive->attach = 0;
2104 return 0;
2105 }
2106 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2107 }
2108
2109 static int idefloppy_revalidate_disk(struct gendisk *disk)
2110 {
2111 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2112 set_capacity(disk, idefloppy_capacity(floppy->drive));
2113 return 0;
2114 }
2115
2116 static struct block_device_operations idefloppy_ops = {
2117 .owner = THIS_MODULE,
2118 .open = idefloppy_open,
2119 .release = idefloppy_release,
2120 .ioctl = idefloppy_ioctl,
2121 .media_changed = idefloppy_media_changed,
2122 .revalidate_disk= idefloppy_revalidate_disk
2123 };
2124
2125 static int idefloppy_attach (ide_drive_t *drive)
2126 {
2127 idefloppy_floppy_t *floppy;
2128 struct gendisk *g;
2129
2130 if (!strstr("ide-floppy", drive->driver_req))
2131 goto failed;
2132 if (!drive->present)
2133 goto failed;
2134 if (drive->media != ide_floppy)
2135 goto failed;
2136 if (!idefloppy_identify_device (drive, drive->id)) {
2137 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2138 goto failed;
2139 }
2140 if (drive->scsi) {
2141 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2142 goto failed;
2143 }
2144 if ((floppy = (idefloppy_floppy_t *) kmalloc (sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
2145 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2146 goto failed;
2147 }
2148
2149 g = alloc_disk(1 << PARTN_BITS);
2150 if (!g)
2151 goto out_free_floppy;
2152
2153 ide_init_disk(g, drive);
2154
2155 if (ide_register_subdriver(drive, &idefloppy_driver)) {
2156 printk (KERN_ERR "ide-floppy: %s: Failed to register the driver with ide.c\n", drive->name);
2157 goto out_put_disk;
2158 }
2159
2160 memset(floppy, 0, sizeof(*floppy));
2161
2162 kref_init(&floppy->kref);
2163
2164 floppy->drive = drive;
2165 floppy->driver = &idefloppy_driver;
2166 floppy->disk = g;
2167
2168 g->private_data = &floppy->driver;
2169
2170 drive->driver_data = floppy;
2171
2172 DRIVER(drive)->busy++;
2173 idefloppy_setup (drive, floppy);
2174 DRIVER(drive)->busy--;
2175 g->minors = 1 << PARTN_BITS;
2176 g->driverfs_dev = &drive->gendev;
2177 strcpy(g->devfs_name, drive->devfs_name);
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_put_disk:
2185 put_disk(g);
2186 out_free_floppy:
2187 kfree(floppy);
2188 failed:
2189 return 1;
2190 }
2191
2192 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2193
2194 static void __exit idefloppy_exit (void)
2195 {
2196 ide_unregister_driver(&idefloppy_driver);
2197 }
2198
2199 /*
2200 * idefloppy_init will register the driver for each floppy.
2201 */
2202 static int idefloppy_init (void)
2203 {
2204 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
2205 ide_register_driver(&idefloppy_driver);
2206 return 0;
2207 }
2208
2209 module_init(idefloppy_init);
2210 module_exit(idefloppy_exit);
2211 MODULE_LICENSE("GPL");
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