blob: 830186fdcc745933059ca0ced510b7fee2679276 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070085#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>
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800100#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Bartlomiej Zolnierkiewicz89636af2007-07-20 01:11:59 +0200102#include <scsi/scsi_ioctl.h>
103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104#include <asm/byteorder.h>
105#include <asm/irq.h>
106#include <asm/uaccess.h>
107#include <asm/io.h>
108#include <asm/unaligned.h>
109
110/*
111 * The following are used to debug the driver.
112 */
113#define IDEFLOPPY_DEBUG_LOG 0
114#define IDEFLOPPY_DEBUG_INFO 0
115#define IDEFLOPPY_DEBUG_BUGS 1
116
117/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
118#define IDEFLOPPY_DEBUG( fmt, args... )
119
120#if IDEFLOPPY_DEBUG_LOG
121#define debug_log printk
122#else
123#define debug_log(fmt, args... ) do {} while(0)
124#endif
125
126
127/*
128 * Some drives require a longer irq timeout.
129 */
130#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
131
132/*
133 * After each failed packet command we issue a request sense command
134 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
135 */
136#define IDEFLOPPY_MAX_PC_RETRIES 3
137
138/*
139 * With each packet command, we allocate a buffer of
140 * IDEFLOPPY_PC_BUFFER_SIZE bytes.
141 */
142#define IDEFLOPPY_PC_BUFFER_SIZE 256
143
144/*
145 * In various places in the driver, we need to allocate storage
146 * for packet commands and requests, which will remain valid while
147 * we leave the driver to wait for an interrupt or a timeout event.
148 */
149#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
150
151/*
152 * Our view of a packet command.
153 */
154typedef struct idefloppy_packet_command_s {
155 u8 c[12]; /* Actual packet bytes */
156 int retries; /* On each retry, we increment retries */
157 int error; /* Error code */
158 int request_transfer; /* Bytes to transfer */
159 int actually_transferred; /* Bytes actually transferred */
160 int buffer_size; /* Size of our data buffer */
161 int b_count; /* Missing/Available data on the current buffer */
162 struct request *rq; /* The corresponding request */
163 u8 *buffer; /* Data buffer */
164 u8 *current_position; /* Pointer into the above buffer */
165 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */
166 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
167 unsigned long flags; /* Status/Action bit flags: long for set_bit */
168} idefloppy_pc_t;
169
170/*
171 * Packet command flag bits.
172 */
173#define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */
174#define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */
175#define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */
176#define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */
177#define PC_WRITING 5 /* Data direction */
178
179#define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */
180
181/*
182 * Removable Block Access Capabilities Page
183 */
184typedef struct {
185#if defined(__LITTLE_ENDIAN_BITFIELD)
186 unsigned page_code :6; /* Page code - Should be 0x1b */
187 unsigned reserved1_6 :1; /* Reserved */
188 unsigned ps :1; /* Should be 0 */
189#elif defined(__BIG_ENDIAN_BITFIELD)
190 unsigned ps :1; /* Should be 0 */
191 unsigned reserved1_6 :1; /* Reserved */
192 unsigned page_code :6; /* Page code - Should be 0x1b */
193#else
194#error "Bitfield endianness not defined! Check your byteorder.h"
195#endif
196 u8 page_length; /* Page Length - Should be 0xa */
197#if defined(__LITTLE_ENDIAN_BITFIELD)
198 unsigned reserved2 :6;
199 unsigned srfp :1; /* Supports reporting progress of format */
200 unsigned sflp :1; /* System floppy type device */
201 unsigned tlun :3; /* Total logical units supported by the device */
202 unsigned reserved3 :3;
203 unsigned sml :1; /* Single / Multiple lun supported */
204 unsigned ncd :1; /* Non cd optical device */
205#elif defined(__BIG_ENDIAN_BITFIELD)
206 unsigned sflp :1; /* System floppy type device */
207 unsigned srfp :1; /* Supports reporting progress of format */
208 unsigned reserved2 :6;
209 unsigned ncd :1; /* Non cd optical device */
210 unsigned sml :1; /* Single / Multiple lun supported */
211 unsigned reserved3 :3;
212 unsigned tlun :3; /* Total logical units supported by the device */
213#else
214#error "Bitfield endianness not defined! Check your byteorder.h"
215#endif
216 u8 reserved[8];
217} idefloppy_capabilities_page_t;
218
219/*
220 * Flexible disk page.
221 */
222typedef struct {
223#if defined(__LITTLE_ENDIAN_BITFIELD)
224 unsigned page_code :6; /* Page code - Should be 0x5 */
225 unsigned reserved1_6 :1; /* Reserved */
226 unsigned ps :1; /* The device is capable of saving the page */
227#elif defined(__BIG_ENDIAN_BITFIELD)
228 unsigned ps :1; /* The device is capable of saving the page */
229 unsigned reserved1_6 :1; /* Reserved */
230 unsigned page_code :6; /* Page code - Should be 0x5 */
231#else
232#error "Bitfield endianness not defined! Check your byteorder.h"
233#endif
234 u8 page_length; /* Page Length - Should be 0x1e */
235 u16 transfer_rate; /* In kilobits per second */
236 u8 heads, sectors; /* Number of heads, Number of sectors per track */
237 u16 sector_size; /* Byes per sector */
238 u16 cyls; /* Number of cylinders */
239 u8 reserved10[10];
240 u8 motor_delay; /* Motor off delay */
241 u8 reserved21[7];
242 u16 rpm; /* Rotations per minute */
243 u8 reserved30[2];
244} idefloppy_flexible_disk_page_t;
245
246/*
247 * Format capacity
248 */
249typedef struct {
250 u8 reserved[3];
251 u8 length; /* Length of the following descriptors in bytes */
252} idefloppy_capacity_header_t;
253
254typedef struct {
255 u32 blocks; /* Number of blocks */
256#if defined(__LITTLE_ENDIAN_BITFIELD)
257 unsigned dc :2; /* Descriptor Code */
258 unsigned reserved :6;
259#elif defined(__BIG_ENDIAN_BITFIELD)
260 unsigned reserved :6;
261 unsigned dc :2; /* Descriptor Code */
262#else
263#error "Bitfield endianness not defined! Check your byteorder.h"
264#endif
265 u8 length_msb; /* Block Length (MSB)*/
266 u16 length; /* Block Length */
267} idefloppy_capacity_descriptor_t;
268
269#define CAPACITY_INVALID 0x00
270#define CAPACITY_UNFORMATTED 0x01
271#define CAPACITY_CURRENT 0x02
272#define CAPACITY_NO_CARTRIDGE 0x03
273
274/*
275 * Most of our global data which we need to save even as we leave the
276 * driver due to an interrupt or a timer event is stored in a variable
277 * of type idefloppy_floppy_t, defined below.
278 */
279typedef struct ide_floppy_obj {
280 ide_drive_t *drive;
281 ide_driver_t *driver;
282 struct gendisk *disk;
283 struct kref kref;
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +0100284 unsigned int openers; /* protected by BKL for now */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
286 /* Current packet command */
287 idefloppy_pc_t *pc;
288 /* Last failed packet command */
289 idefloppy_pc_t *failed_pc;
290 /* Packet command stack */
291 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
292 /* Next free packet command storage space */
293 int pc_stack_index;
294 struct request rq_stack[IDEFLOPPY_PC_STACK];
295 /* We implement a circular array */
296 int rq_stack_index;
297
298 /*
299 * Last error information
300 */
301 u8 sense_key, asc, ascq;
302 /* delay this long before sending packet command */
303 u8 ticks;
304 int progress_indication;
305
306 /*
307 * Device information
308 */
309 /* Current format */
310 int blocks, block_size, bs_factor;
311 /* Last format capacity */
312 idefloppy_capacity_descriptor_t capacity;
313 /* Copy of the flexible disk page */
314 idefloppy_flexible_disk_page_t flexible_disk_page;
315 /* Write protect */
316 int wp;
317 /* Supports format progress report */
318 int srfp;
319 /* Status/Action flags */
320 unsigned long flags;
321} idefloppy_floppy_t;
322
Bartlomiej Zolnierkiewiczc40d3d32005-08-18 22:09:21 +0200323#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
325/*
326 * Floppy flag bits values.
327 */
328#define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */
329#define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */
330#define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */
331#define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */
332#define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */
333#define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */
334
335/*
336 * ATAPI floppy drive packet commands
337 */
338#define IDEFLOPPY_FORMAT_UNIT_CMD 0x04
339#define IDEFLOPPY_INQUIRY_CMD 0x12
340#define IDEFLOPPY_MODE_SELECT_CMD 0x55
341#define IDEFLOPPY_MODE_SENSE_CMD 0x5a
342#define IDEFLOPPY_READ10_CMD 0x28
343#define IDEFLOPPY_READ12_CMD 0xa8
344#define IDEFLOPPY_READ_CAPACITY_CMD 0x23
345#define IDEFLOPPY_REQUEST_SENSE_CMD 0x03
346#define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e
347#define IDEFLOPPY_SEEK_CMD 0x2b
348#define IDEFLOPPY_START_STOP_CMD 0x1b
349#define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00
350#define IDEFLOPPY_VERIFY_CMD 0x2f
351#define IDEFLOPPY_WRITE10_CMD 0x2a
352#define IDEFLOPPY_WRITE12_CMD 0xaa
353#define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e
354
355/*
356 * Defines for the mode sense command
357 */
358#define MODE_SENSE_CURRENT 0x00
359#define MODE_SENSE_CHANGEABLE 0x01
360#define MODE_SENSE_DEFAULT 0x02
361#define MODE_SENSE_SAVED 0x03
362
363/*
364 * IOCTLs used in low-level formatting.
365 */
366
367#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600
368#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601
369#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602
370#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603
371
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372/*
373 * Error codes which are returned in rq->errors to the higher part
374 * of the driver.
375 */
376#define IDEFLOPPY_ERROR_GENERAL 101
377
378/*
379 * The following is used to format the general configuration word of
380 * the ATAPI IDENTIFY DEVICE command.
381 */
382struct idefloppy_id_gcw {
383#if defined(__LITTLE_ENDIAN_BITFIELD)
384 unsigned packet_size :2; /* Packet Size */
385 unsigned reserved234 :3; /* Reserved */
386 unsigned drq_type :2; /* Command packet DRQ type */
387 unsigned removable :1; /* Removable media */
388 unsigned device_type :5; /* Device type */
389 unsigned reserved13 :1; /* Reserved */
390 unsigned protocol :2; /* Protocol type */
391#elif defined(__BIG_ENDIAN_BITFIELD)
392 unsigned protocol :2; /* Protocol type */
393 unsigned reserved13 :1; /* Reserved */
394 unsigned device_type :5; /* Device type */
395 unsigned removable :1; /* Removable media */
396 unsigned drq_type :2; /* Command packet DRQ type */
397 unsigned reserved234 :3; /* Reserved */
398 unsigned packet_size :2; /* Packet Size */
399#else
400#error "Bitfield endianness not defined! Check your byteorder.h"
401#endif
402};
403
404/*
405 * INQUIRY packet command - Data Format
406 */
407typedef struct {
408#if defined(__LITTLE_ENDIAN_BITFIELD)
409 unsigned device_type :5; /* Peripheral Device Type */
410 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
411 unsigned reserved1_6t0 :7; /* Reserved */
412 unsigned rmb :1; /* Removable Medium Bit */
413 unsigned ansi_version :3; /* ANSI Version */
414 unsigned ecma_version :3; /* ECMA Version */
415 unsigned iso_version :2; /* ISO Version */
416 unsigned response_format :4; /* Response Data Format */
417 unsigned reserved3_45 :2; /* Reserved */
418 unsigned reserved3_6 :1; /* TrmIOP - Reserved */
419 unsigned reserved3_7 :1; /* AENC - Reserved */
420#elif defined(__BIG_ENDIAN_BITFIELD)
421 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */
422 unsigned device_type :5; /* Peripheral Device Type */
423 unsigned rmb :1; /* Removable Medium Bit */
424 unsigned reserved1_6t0 :7; /* Reserved */
425 unsigned iso_version :2; /* ISO Version */
426 unsigned ecma_version :3; /* ECMA Version */
427 unsigned ansi_version :3; /* ANSI Version */
428 unsigned reserved3_7 :1; /* AENC - Reserved */
429 unsigned reserved3_6 :1; /* TrmIOP - Reserved */
430 unsigned reserved3_45 :2; /* Reserved */
431 unsigned response_format :4; /* Response Data Format */
432#else
433#error "Bitfield endianness not defined! Check your byteorder.h"
434#endif
435 u8 additional_length; /* Additional Length (total_length-4) */
436 u8 rsv5, rsv6, rsv7; /* Reserved */
437 u8 vendor_id[8]; /* Vendor Identification */
438 u8 product_id[16]; /* Product Identification */
439 u8 revision_level[4]; /* Revision Level */
440 u8 vendor_specific[20]; /* Vendor Specific - Optional */
441 u8 reserved56t95[40]; /* Reserved - Optional */
442 /* Additional information may be returned */
443} idefloppy_inquiry_result_t;
444
445/*
446 * REQUEST SENSE packet command result - Data Format.
447 */
448typedef struct {
449#if defined(__LITTLE_ENDIAN_BITFIELD)
450 unsigned error_code :7; /* Current error (0x70) */
451 unsigned valid :1; /* The information field conforms to SFF-8070i */
452 u8 reserved1 :8; /* Reserved */
453 unsigned sense_key :4; /* Sense Key */
454 unsigned reserved2_4 :1; /* Reserved */
455 unsigned ili :1; /* Incorrect Length Indicator */
456 unsigned reserved2_67 :2;
457#elif defined(__BIG_ENDIAN_BITFIELD)
458 unsigned valid :1; /* The information field conforms to SFF-8070i */
459 unsigned error_code :7; /* Current error (0x70) */
460 u8 reserved1 :8; /* Reserved */
461 unsigned reserved2_67 :2;
462 unsigned ili :1; /* Incorrect Length Indicator */
463 unsigned reserved2_4 :1; /* Reserved */
464 unsigned sense_key :4; /* Sense Key */
465#else
466#error "Bitfield endianness not defined! Check your byteorder.h"
467#endif
468 u32 information __attribute__ ((packed));
469 u8 asl; /* Additional sense length (n-7) */
470 u32 command_specific; /* Additional command specific information */
471 u8 asc; /* Additional Sense Code */
472 u8 ascq; /* Additional Sense Code Qualifier */
473 u8 replaceable_unit_code; /* Field Replaceable Unit Code */
474 u8 sksv[3];
475 u8 pad[2]; /* Padding to 20 bytes */
476} idefloppy_request_sense_result_t;
477
478/*
479 * Pages of the SELECT SENSE / MODE SENSE packet commands.
480 */
481#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b
482#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05
483
484/*
485 * Mode Parameter Header for the MODE SENSE packet command
486 */
487typedef struct {
488 u16 mode_data_length; /* Length of the following data transfer */
489 u8 medium_type; /* Medium Type */
490#if defined(__LITTLE_ENDIAN_BITFIELD)
491 unsigned reserved3 :7;
492 unsigned wp :1; /* Write protect */
493#elif defined(__BIG_ENDIAN_BITFIELD)
494 unsigned wp :1; /* Write protect */
495 unsigned reserved3 :7;
496#else
497#error "Bitfield endianness not defined! Check your byteorder.h"
498#endif
499 u8 reserved[4];
500} idefloppy_mode_parameter_header_t;
501
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800502static DEFINE_MUTEX(idefloppy_ref_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503
504#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
505
506#define ide_floppy_g(disk) \
507 container_of((disk)->private_data, struct ide_floppy_obj, driver)
508
509static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
510{
511 struct ide_floppy_obj *floppy = NULL;
512
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800513 mutex_lock(&idefloppy_ref_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 floppy = ide_floppy_g(disk);
515 if (floppy)
516 kref_get(&floppy->kref);
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800517 mutex_unlock(&idefloppy_ref_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 return floppy;
519}
520
521static void ide_floppy_release(struct kref *);
522
523static void ide_floppy_put(struct ide_floppy_obj *floppy)
524{
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800525 mutex_lock(&idefloppy_ref_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 kref_put(&floppy->kref, ide_floppy_release);
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800527 mutex_unlock(&idefloppy_ref_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528}
529
530/*
531 * Too bad. The drive wants to send us data which we are not ready to accept.
532 * Just throw it away.
533 */
534static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
535{
536 while (bcount--)
537 (void) HWIF(drive)->INB(IDE_DATA_REG);
538}
539
540#if IDEFLOPPY_DEBUG_BUGS
541static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
542{
543 while (bcount--)
544 HWIF(drive)->OUTB(0, IDE_DATA_REG);
545}
546#endif /* IDEFLOPPY_DEBUG_BUGS */
547
548
549/*
550 * idefloppy_do_end_request is used to finish servicing a request.
551 *
552 * For read/write requests, we will call ide_end_request to pass to the
553 * next buffer.
554 */
555static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
556{
557 idefloppy_floppy_t *floppy = drive->driver_data;
558 struct request *rq = HWGROUP(drive)->rq;
559 int error;
560
561 debug_log(KERN_INFO "Reached idefloppy_end_request\n");
562
563 switch (uptodate) {
564 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
565 case 1: error = 0; break;
566 default: error = uptodate;
567 }
568 if (error)
569 floppy->failed_pc = NULL;
570 /* Why does this happen? */
571 if (!rq)
572 return 0;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200573 if (!blk_special_request(rq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 /* our real local end request function */
575 ide_end_request(drive, uptodate, nsecs);
576 return 0;
577 }
578 rq->errors = error;
579 /* fixme: need to move this local also */
580 ide_end_drive_cmd(drive, 0, 0);
581 return 0;
582}
583
584static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
585{
586 struct request *rq = pc->rq;
587 struct bio_vec *bvec;
NeilBrown5705f702007-09-25 12:35:59 +0200588 struct req_iterator iter;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 unsigned long flags;
590 char *data;
NeilBrown5705f702007-09-25 12:35:59 +0200591 int count, done = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592
NeilBrown5705f702007-09-25 12:35:59 +0200593 rq_for_each_segment(bvec, rq, iter) {
Jens Axboe6c92e692007-08-16 13:43:12 +0200594 if (!bcount)
595 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
Jens Axboe6c92e692007-08-16 13:43:12 +0200597 count = min(bvec->bv_len, bcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598
Jens Axboe6c92e692007-08-16 13:43:12 +0200599 data = bvec_kmap_irq(bvec, &flags);
600 drive->hwif->atapi_input_bytes(drive, data, count);
601 bvec_kunmap_irq(data, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
Jens Axboe6c92e692007-08-16 13:43:12 +0200603 bcount -= count;
604 pc->b_count += count;
605 done += count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 }
607
608 idefloppy_do_end_request(drive, 1, done >> 9);
609
610 if (bcount) {
611 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
612 idefloppy_discard_data(drive, bcount);
613 }
614}
615
616static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
617{
618 struct request *rq = pc->rq;
NeilBrown5705f702007-09-25 12:35:59 +0200619 struct req_iterator iter;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 struct bio_vec *bvec;
621 unsigned long flags;
NeilBrown5705f702007-09-25 12:35:59 +0200622 int count, done = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 char *data;
624
NeilBrown5705f702007-09-25 12:35:59 +0200625 rq_for_each_segment(bvec, rq, iter) {
Jens Axboe6c92e692007-08-16 13:43:12 +0200626 if (!bcount)
627 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
Jens Axboe6c92e692007-08-16 13:43:12 +0200629 count = min(bvec->bv_len, bcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630
Jens Axboe6c92e692007-08-16 13:43:12 +0200631 data = bvec_kmap_irq(bvec, &flags);
632 drive->hwif->atapi_output_bytes(drive, data, count);
633 bvec_kunmap_irq(data, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634
Jens Axboe6c92e692007-08-16 13:43:12 +0200635 bcount -= count;
636 pc->b_count += count;
637 done += count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 }
639
640 idefloppy_do_end_request(drive, 1, done >> 9);
641
Jan Beulichc7ea4b32005-06-23 00:09:59 -0700642#if IDEFLOPPY_DEBUG_BUGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 if (bcount) {
644 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
645 idefloppy_write_zeros(drive, bcount);
646 }
Jan Beulichc7ea4b32005-06-23 00:09:59 -0700647#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648}
649
650static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
651{
652 struct request *rq = pc->rq;
653 struct bio *bio = rq->bio;
654
655 while ((bio = rq->bio) != NULL)
656 idefloppy_do_end_request(drive, 1, 0);
657}
658
659/*
660 * idefloppy_queue_pc_head generates a new packet command request in front
661 * of the request queue, before the current request, so that it will be
662 * processed immediately, on the next pass through the driver.
663 */
664static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
665{
666 struct ide_floppy_obj *floppy = drive->driver_data;
667
668 ide_init_drive_cmd(rq);
669 rq->buffer = (char *) pc;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200670 rq->cmd_type = REQ_TYPE_SPECIAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 rq->rq_disk = floppy->disk;
672 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
673}
674
675static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
676{
677 idefloppy_floppy_t *floppy = drive->driver_data;
678
679 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
680 floppy->pc_stack_index=0;
681 return (&floppy->pc_stack[floppy->pc_stack_index++]);
682}
683
684static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
685{
686 idefloppy_floppy_t *floppy = drive->driver_data;
687
688 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
689 floppy->rq_stack_index = 0;
690 return (&floppy->rq_stack[floppy->rq_stack_index++]);
691}
692
693/*
694 * idefloppy_analyze_error is called on each failed packet command retry
695 * to analyze the request sense.
696 */
697static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
698{
699 idefloppy_floppy_t *floppy = drive->driver_data;
700
701 floppy->sense_key = result->sense_key;
702 floppy->asc = result->asc;
703 floppy->ascq = result->ascq;
704 floppy->progress_indication = result->sksv[0] & 0x80 ?
705 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
706 if (floppy->failed_pc)
707 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
708 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
709 result->sense_key, result->asc, result->ascq);
710 else
711 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
712 "ascq = %x\n", result->sense_key,
713 result->asc, result->ascq);
714}
715
716static void idefloppy_request_sense_callback (ide_drive_t *drive)
717{
718 idefloppy_floppy_t *floppy = drive->driver_data;
719
720 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
721
722 if (!floppy->pc->error) {
723 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
724 idefloppy_do_end_request(drive, 1, 0);
725 } else {
726 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
727 idefloppy_do_end_request(drive, 0, 0);
728 }
729}
730
731/*
732 * General packet command callback function.
733 */
734static void idefloppy_pc_callback (ide_drive_t *drive)
735{
736 idefloppy_floppy_t *floppy = drive->driver_data;
737
738 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
739
740 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
741}
742
743/*
744 * idefloppy_init_pc initializes a packet command.
745 */
746static void idefloppy_init_pc (idefloppy_pc_t *pc)
747{
748 memset(pc->c, 0, 12);
749 pc->retries = 0;
750 pc->flags = 0;
751 pc->request_transfer = 0;
752 pc->buffer = pc->pc_buffer;
753 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
754 pc->callback = &idefloppy_pc_callback;
755}
756
757static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
758{
759 idefloppy_init_pc(pc);
760 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
761 pc->c[4] = 255;
762 pc->request_transfer = 18;
763 pc->callback = &idefloppy_request_sense_callback;
764}
765
766/*
767 * idefloppy_retry_pc is called when an error was detected during the
768 * last packet command. We queue a request sense packet command in
769 * the head of the request list.
770 */
771static void idefloppy_retry_pc (ide_drive_t *drive)
772{
773 idefloppy_pc_t *pc;
774 struct request *rq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Bartlomiej Zolnierkiewicz0e38a662008-01-25 22:17:12 +0100776 (void)drive->hwif->INB(IDE_ERROR_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 pc = idefloppy_next_pc_storage(drive);
778 rq = idefloppy_next_rq_storage(drive);
779 idefloppy_create_request_sense_cmd(pc);
780 idefloppy_queue_pc_head(drive, pc, rq);
781}
782
783/*
784 * idefloppy_pc_intr is the usual interrupt handler which will be called
785 * during a packet command.
786 */
787static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
788{
789 idefloppy_floppy_t *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100790 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 idefloppy_pc_t *pc = floppy->pc;
792 struct request *rq = pc->rq;
793 unsigned int temp;
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100794 u16 bcount;
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100795 u8 stat, ireason;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
797 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
798 __FUNCTION__);
799
800 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
801 if (HWIF(drive)->ide_dma_end(drive)) {
802 set_bit(PC_DMA_ERROR, &pc->flags);
803 } else {
804 pc->actually_transferred = pc->request_transfer;
805 idefloppy_update_buffers(drive, pc);
806 }
807 debug_log(KERN_INFO "ide-floppy: DMA finished\n");
808 }
809
810 /* Clear the interrupt */
Bartlomiej Zolnierkiewicz22c525b2008-01-25 22:17:11 +0100811 stat = drive->hwif->INB(IDE_STATUS_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
Bartlomiej Zolnierkiewicz22c525b2008-01-25 22:17:11 +0100813 if ((stat & DRQ_STAT) == 0) { /* No more interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 debug_log(KERN_INFO "Packet command completed, %d bytes "
815 "transferred\n", pc->actually_transferred);
816 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
817
Ingo Molnar366c7f52006-07-03 00:25:25 -0700818 local_irq_enable_in_hardirq();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
Bartlomiej Zolnierkiewicz22c525b2008-01-25 22:17:11 +0100820 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 /* Error detected */
822 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
823 drive->name);
824 rq->errors++;
825 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
826 printk(KERN_ERR "ide-floppy: I/O error in "
827 "request sense command\n");
828 return ide_do_reset(drive);
829 }
830 /* Retry operation */
831 idefloppy_retry_pc(drive);
832 /* queued, but not started */
833 return ide_stopped;
834 }
835 pc->error = 0;
836 if (floppy->failed_pc == pc)
837 floppy->failed_pc = NULL;
838 /* Command finished - Call the callback function */
839 pc->callback(drive);
840 return ide_stopped;
841 }
842
843 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
844 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
845 "more interrupts in DMA mode\n");
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100846 ide_dma_off(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 return ide_do_reset(drive);
848 }
849
850 /* Get the number of bytes to transfer */
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100851 bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
852 hwif->INB(IDE_BCOUNTL_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 /* on this interrupt */
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100854 ireason = hwif->INB(IDE_IREASON_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100856 if (ireason & CD) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
858 return ide_do_reset(drive);
859 }
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100860 if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 /* Hopefully, we will never get here */
862 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100863 (ireason & IO) ? "Write" : "Read");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 printk(KERN_ERR "but the floppy wants us to %s !\n",
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100865 (ireason & IO) ? "Read" : "Write");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 return ide_do_reset(drive);
867 }
868 if (!test_bit(PC_WRITING, &pc->flags)) {
869 /* Reading - Check that we have enough space */
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100870 temp = pc->actually_transferred + bcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 if (temp > pc->request_transfer) {
872 if (temp > pc->buffer_size) {
873 printk(KERN_ERR "ide-floppy: The floppy wants "
874 "to send us more data than expected "
875 "- discarding data\n");
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100876 idefloppy_discard_data(drive, bcount);
Eric Sesterhenn125e1872006-06-23 02:06:06 -0700877 BUG_ON(HWGROUP(drive)->handler != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 ide_set_handler(drive,
879 &idefloppy_pc_intr,
880 IDEFLOPPY_WAIT_CMD,
881 NULL);
882 return ide_started;
883 }
884 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
885 "send us more data than expected - "
886 "allowing transfer\n");
887 }
888 }
889 if (test_bit(PC_WRITING, &pc->flags)) {
890 if (pc->buffer != NULL)
891 /* Write the current buffer */
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100892 hwif->atapi_output_bytes(drive, pc->current_position,
893 bcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 else
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100895 idefloppy_output_buffers(drive, pc, bcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 } else {
897 if (pc->buffer != NULL)
898 /* Read the current buffer */
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100899 hwif->atapi_input_bytes(drive, pc->current_position,
900 bcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 else
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100902 idefloppy_input_buffers(drive, pc, bcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 }
904 /* Update the current position */
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100905 pc->actually_transferred += bcount;
906 pc->current_position += bcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907
Eric Sesterhenn125e1872006-06-23 02:06:06 -0700908 BUG_ON(HWGROUP(drive)->handler != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */
910 return ide_started;
911}
912
913/*
914 * This is the original routine that did the packet transfer.
915 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
916 * for that drive below. The algorithm is chosen based on drive type
917 */
918static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
919{
920 ide_startstop_t startstop;
921 idefloppy_floppy_t *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100922 u8 ireason;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923
924 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
925 printk(KERN_ERR "ide-floppy: Strange, packet command "
926 "initiated yet DRQ isn't asserted\n");
927 return startstop;
928 }
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100929 ireason = drive->hwif->INB(IDE_IREASON_REG);
930 if ((ireason & CD) == 0 || (ireason & IO)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
932 "issuing a packet command\n");
933 return ide_do_reset(drive);
934 }
Eric Sesterhenn125e1872006-06-23 02:06:06 -0700935 BUG_ON(HWGROUP(drive)->handler != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 /* Set the interrupt routine */
937 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
938 /* Send the actual packet */
939 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
940 return ide_started;
941}
942
943
944/*
945 * What we have here is a classic case of a top half / bottom half
946 * interrupt service routine. In interrupt mode, the device sends
947 * an interrupt to signal it's ready to receive a packet. However,
948 * we need to delay about 2-3 ticks before issuing the packet or we
949 * gets in trouble.
950 *
951 * So, follow carefully. transfer_pc1 is called as an interrupt (or
952 * directly). In either case, when the device says it's ready for a
953 * packet, we schedule the packet transfer to occur about 2-3 ticks
954 * later in transfer_pc2.
955 */
956static int idefloppy_transfer_pc2 (ide_drive_t *drive)
957{
958 idefloppy_floppy_t *floppy = drive->driver_data;
959
960 /* Send the actual packet */
961 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
962 /* Timeout for the packet command */
963 return IDEFLOPPY_WAIT_CMD;
964}
965
966static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
967{
968 idefloppy_floppy_t *floppy = drive->driver_data;
969 ide_startstop_t startstop;
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100970 u8 ireason;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
972 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
973 printk(KERN_ERR "ide-floppy: Strange, packet command "
974 "initiated yet DRQ isn't asserted\n");
975 return startstop;
976 }
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100977 ireason = drive->hwif->INB(IDE_IREASON_REG);
978 if ((ireason & CD) == 0 || (ireason & IO)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
980 "while issuing a packet command\n");
981 return ide_do_reset(drive);
982 }
983 /*
984 * The following delay solves a problem with ATAPI Zip 100 drives
985 * where the Busy flag was apparently being deasserted before the
986 * unit was ready to receive data. This was happening on a
987 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
988 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
989 * used until after the packet is moved in about 50 msec.
990 */
Eric Sesterhenn125e1872006-06-23 02:06:06 -0700991 BUG_ON(HWGROUP(drive)->handler != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 ide_set_handler(drive,
993 &idefloppy_pc_intr, /* service routine for packet command */
994 floppy->ticks, /* wait this long before "failing" */
995 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */
996 return ide_started;
997}
998
999/**
1000 * idefloppy_should_report_error()
1001 *
1002 * Supresses error messages resulting from Medium not present
1003 */
1004static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
1005{
1006 if (floppy->sense_key == 0x02 &&
1007 floppy->asc == 0x3a &&
1008 floppy->ascq == 0x00)
1009 return 0;
1010 return 1;
1011}
1012
1013/*
1014 * Issue a packet command
1015 */
1016static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
1017{
1018 idefloppy_floppy_t *floppy = drive->driver_data;
1019 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 ide_handler_t *pkt_xfer_routine;
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +01001021 u16 bcount;
Bartlomiej Zolnierkiewicze5f9f5a2008-01-25 22:17:12 +01001022 u8 dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 if (floppy->failed_pc == NULL &&
1025 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
1026 floppy->failed_pc = pc;
1027 /* Set the current packet command */
1028 floppy->pc = pc;
1029
1030 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
1031 test_bit(PC_ABORT, &pc->flags)) {
1032 /*
1033 * We will "abort" retrying a packet command in case
1034 * a legitimate error code was received.
1035 */
1036 if (!test_bit(PC_ABORT, &pc->flags)) {
1037 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
1038 if (idefloppy_should_report_error(floppy))
1039 printk(KERN_ERR "ide-floppy: %s: I/O error, "
1040 "pc = %2x, key = %2x, "
1041 "asc = %2x, ascq = %2x\n",
1042 drive->name, pc->c[0],
1043 floppy->sense_key,
1044 floppy->asc, floppy->ascq);
1045 }
1046 /* Giving up */
1047 pc->error = IDEFLOPPY_ERROR_GENERAL;
1048 }
1049 floppy->failed_pc = NULL;
1050 pc->callback(drive);
1051 return ide_stopped;
1052 }
1053
1054 debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
1055
1056 pc->retries++;
1057 /* We haven't transferred any data yet */
1058 pc->actually_transferred = 0;
1059 pc->current_position = pc->buffer;
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +01001060 bcount = min(pc->request_transfer, 63 * 1024);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +01001062 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
1063 ide_dma_off(drive);
1064
Bartlomiej Zolnierkiewicze5f9f5a2008-01-25 22:17:12 +01001065 dma = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066
1067 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
Bartlomiej Zolnierkiewicze5f9f5a2008-01-25 22:17:12 +01001068 dma = !hwif->dma_setup(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069
1070 if (IDE_CONTROL_REG)
1071 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
1072 /* Use PIO/DMA */
Bartlomiej Zolnierkiewicze5f9f5a2008-01-25 22:17:12 +01001073 hwif->OUTB(dma, IDE_FEATURE_REG);
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +01001074 hwif->OUTB((bcount >> 8) & 0xff, IDE_BCOUNTH_REG);
1075 hwif->OUTB(bcount & 0xff, IDE_BCOUNTL_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
1077
Bartlomiej Zolnierkiewicze5f9f5a2008-01-25 22:17:12 +01001078 if (dma) { /* Begin DMA, if necessary */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
1080 hwif->dma_start(drive);
1081 }
1082
1083 /* Can we transfer the packet when we get the interrupt or wait? */
1084 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
1085 /* wait */
1086 pkt_xfer_routine = &idefloppy_transfer_pc1;
1087 } else {
1088 /* immediate */
1089 pkt_xfer_routine = &idefloppy_transfer_pc;
1090 }
1091
1092 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
1093 /* Issue the packet command */
1094 ide_execute_command(drive, WIN_PACKETCMD,
1095 pkt_xfer_routine,
1096 IDEFLOPPY_WAIT_CMD,
1097 NULL);
1098 return ide_started;
1099 } else {
1100 /* Issue the packet command */
1101 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
1102 return (*pkt_xfer_routine) (drive);
1103 }
1104}
1105
1106static void idefloppy_rw_callback (ide_drive_t *drive)
1107{
1108 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
1109
1110 idefloppy_do_end_request(drive, 1, 0);
1111 return;
1112}
1113
1114static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
1115{
1116 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
1117 "prevent = %d\n", prevent);
1118
1119 idefloppy_init_pc(pc);
1120 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
1121 pc->c[4] = prevent;
1122}
1123
1124static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
1125{
1126 idefloppy_init_pc(pc);
1127 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
1128 pc->c[7] = 255;
1129 pc->c[8] = 255;
1130 pc->request_transfer = 255;
1131}
1132
1133static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
1134 int flags)
1135{
1136 idefloppy_init_pc(pc);
1137 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
1138 pc->c[1] = 0x17;
1139
1140 memset(pc->buffer, 0, 12);
1141 pc->buffer[1] = 0xA2;
1142 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
1143
1144 if (flags & 1) /* Verify bit on... */
1145 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */
1146 pc->buffer[3] = 8;
1147
1148 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
1149 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
1150 pc->buffer_size=12;
1151 set_bit(PC_WRITING, &pc->flags);
1152}
1153
1154/*
1155 * A mode sense command is used to "sense" floppy parameters.
1156 */
1157static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
1158{
1159 u16 length = sizeof(idefloppy_mode_parameter_header_t);
1160
1161 idefloppy_init_pc(pc);
1162 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
1163 pc->c[1] = 0;
1164 pc->c[2] = page_code + (type << 6);
1165
1166 switch (page_code) {
1167 case IDEFLOPPY_CAPABILITIES_PAGE:
1168 length += 12;
1169 break;
1170 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
1171 length += 32;
1172 break;
1173 default:
1174 printk(KERN_ERR "ide-floppy: unsupported page code "
1175 "in create_mode_sense_cmd\n");
1176 }
1177 put_unaligned(htons(length), (u16 *) &pc->c[7]);
1178 pc->request_transfer = length;
1179}
1180
1181static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
1182{
1183 idefloppy_init_pc(pc);
1184 pc->c[0] = IDEFLOPPY_START_STOP_CMD;
1185 pc->c[4] = start;
1186}
1187
1188static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
1189{
1190 idefloppy_init_pc(pc);
1191 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
1192}
1193
1194static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
1195{
1196 int block = sector / floppy->bs_factor;
1197 int blocks = rq->nr_sectors / floppy->bs_factor;
1198 int cmd = rq_data_dir(rq);
1199
1200 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
1201 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
1202 block, blocks);
1203
1204 idefloppy_init_pc(pc);
1205 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
1206 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
1207 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
1208 } else {
1209 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
1210 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
1211 }
1212 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
1213 pc->callback = &idefloppy_rw_callback;
1214 pc->rq = rq;
1215 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
Jens Axboe4aff5e22006-08-10 08:44:47 +02001216 if (rq->cmd_flags & REQ_RW)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 set_bit(PC_WRITING, &pc->flags);
1218 pc->buffer = NULL;
1219 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
1220 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1221}
1222
Jens Axboe3d6392c2007-07-09 12:38:05 +02001223static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
1225{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 idefloppy_init_pc(pc);
Jens Axboe3d6392c2007-07-09 12:38:05 +02001227 pc->callback = &idefloppy_rw_callback;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 memcpy(pc->c, rq->cmd, sizeof(pc->c));
Jens Axboe3d6392c2007-07-09 12:38:05 +02001229 pc->rq = rq;
1230 pc->b_count = rq->data_len;
1231 if (rq->data_len && rq_data_dir(rq) == WRITE)
1232 set_bit(PC_WRITING, &pc->flags);
1233 pc->buffer = rq->data;
1234 if (rq->bio)
1235 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
1236
1237 /*
1238 * possibly problematic, doesn't look like ide-floppy correctly
1239 * handled scattered requests if dma fails...
1240 */
1241 pc->request_transfer = pc->buffer_size = rq->data_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242}
1243
1244/*
1245 * idefloppy_do_request is our request handling function.
1246 */
1247static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
1248{
1249 idefloppy_floppy_t *floppy = drive->driver_data;
1250 idefloppy_pc_t *pc;
1251 unsigned long block = (unsigned long)block_s;
1252
Jens Axboecdd60262006-07-28 09:32:07 +02001253 debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
Randy Dunlap18cddac2006-06-25 05:48:56 -07001254 rq->rq_disk ? rq->rq_disk->disk_name : "?",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 rq->flags, rq->errors);
1256 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
1257 "current_nr_sectors: %d\n", (long)rq->sector,
1258 rq->nr_sectors, rq->current_nr_sectors);
1259
1260 if (rq->errors >= ERROR_MAX) {
1261 if (floppy->failed_pc != NULL) {
1262 if (idefloppy_should_report_error(floppy))
1263 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
1264 " key = %2x, asc = %2x, ascq = %2x\n",
1265 drive->name, floppy->failed_pc->c[0],
1266 floppy->sense_key, floppy->asc, floppy->ascq);
1267 }
1268 else
1269 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
1270 drive->name);
1271 idefloppy_do_end_request(drive, 0, 0);
1272 return ide_stopped;
1273 }
Jens Axboe4aff5e22006-08-10 08:44:47 +02001274 if (blk_fs_request(rq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 if (((long)rq->sector % floppy->bs_factor) ||
1276 (rq->nr_sectors % floppy->bs_factor)) {
1277 printk("%s: unsupported r/w request size\n",
1278 drive->name);
1279 idefloppy_do_end_request(drive, 0, 0);
1280 return ide_stopped;
1281 }
1282 pc = idefloppy_next_pc_storage(drive);
1283 idefloppy_create_rw_cmd(floppy, pc, rq, block);
Jens Axboe4aff5e22006-08-10 08:44:47 +02001284 } else if (blk_special_request(rq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 pc = (idefloppy_pc_t *) rq->buffer;
Jens Axboe4aff5e22006-08-10 08:44:47 +02001286 } else if (blk_pc_request(rq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 pc = idefloppy_next_pc_storage(drive);
Jens Axboe3d6392c2007-07-09 12:38:05 +02001288 idefloppy_blockpc_cmd(floppy, pc, rq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289 } else {
1290 blk_dump_rq_flags(rq,
1291 "ide-floppy: unsupported command in queue");
1292 idefloppy_do_end_request(drive, 0, 0);
1293 return ide_stopped;
1294 }
1295
1296 pc->rq = rq;
1297 return idefloppy_issue_pc(drive, pc);
1298}
1299
1300/*
1301 * idefloppy_queue_pc_tail adds a special packet command request to the
1302 * tail of the request queue, and waits for it to be serviced.
1303 */
1304static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
1305{
1306 struct ide_floppy_obj *floppy = drive->driver_data;
1307 struct request rq;
1308
1309 ide_init_drive_cmd (&rq);
1310 rq.buffer = (char *) pc;
Jens Axboe4aff5e22006-08-10 08:44:47 +02001311 rq.cmd_type = REQ_TYPE_SPECIAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 rq.rq_disk = floppy->disk;
1313
1314 return ide_do_drive_cmd(drive, &rq, ide_wait);
1315}
1316
1317/*
1318 * Look at the flexible disk page parameters. We will ignore the CHS
1319 * capacity parameters and use the LBA parameters instead.
1320 */
1321static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
1322{
1323 idefloppy_floppy_t *floppy = drive->driver_data;
1324 idefloppy_pc_t pc;
1325 idefloppy_mode_parameter_header_t *header;
1326 idefloppy_flexible_disk_page_t *page;
1327 int capacity, lba_capacity;
1328
1329 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
1330 if (idefloppy_queue_pc_tail(drive,&pc)) {
1331 printk(KERN_ERR "ide-floppy: Can't get flexible disk "
1332 "page parameters\n");
1333 return 1;
1334 }
1335 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1336 floppy->wp = header->wp;
1337 set_disk_ro(floppy->disk, floppy->wp);
1338 page = (idefloppy_flexible_disk_page_t *) (header + 1);
1339
1340 page->transfer_rate = ntohs(page->transfer_rate);
1341 page->sector_size = ntohs(page->sector_size);
1342 page->cyls = ntohs(page->cyls);
1343 page->rpm = ntohs(page->rpm);
1344 capacity = page->cyls * page->heads * page->sectors * page->sector_size;
1345 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
1346 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1347 "%d sector size, %d rpm\n",
1348 drive->name, capacity / 1024, page->cyls,
1349 page->heads, page->sectors,
1350 page->transfer_rate / 8, page->sector_size, page->rpm);
1351
1352 floppy->flexible_disk_page = *page;
1353 drive->bios_cyl = page->cyls;
1354 drive->bios_head = page->heads;
1355 drive->bios_sect = page->sectors;
1356 lba_capacity = floppy->blocks * floppy->block_size;
1357 if (capacity < lba_capacity) {
1358 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1359 "bytes, but the drive only handles %d\n",
1360 drive->name, lba_capacity, capacity);
1361 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
1362 }
1363 return 0;
1364}
1365
1366static int idefloppy_get_capability_page(ide_drive_t *drive)
1367{
1368 idefloppy_floppy_t *floppy = drive->driver_data;
1369 idefloppy_pc_t pc;
1370 idefloppy_mode_parameter_header_t *header;
1371 idefloppy_capabilities_page_t *page;
1372
1373 floppy->srfp = 0;
1374 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1375 MODE_SENSE_CURRENT);
1376
1377 set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1378 if (idefloppy_queue_pc_tail(drive,&pc)) {
1379 return 1;
1380 }
1381
1382 header = (idefloppy_mode_parameter_header_t *) pc.buffer;
1383 page= (idefloppy_capabilities_page_t *)(header+1);
1384 floppy->srfp = page->srfp;
1385 return (0);
1386}
1387
1388/*
1389 * Determine if a media is present in the floppy drive, and if so,
1390 * its LBA capacity.
1391 */
1392static int idefloppy_get_capacity (ide_drive_t *drive)
1393{
1394 idefloppy_floppy_t *floppy = drive->driver_data;
1395 idefloppy_pc_t pc;
1396 idefloppy_capacity_header_t *header;
1397 idefloppy_capacity_descriptor_t *descriptor;
1398 int i, descriptors, rc = 1, blocks, length;
1399
1400 drive->bios_cyl = 0;
1401 drive->bios_head = drive->bios_sect = 0;
Alan Coxfdb77da2007-02-17 02:40:20 +01001402 floppy->blocks = 0;
1403 floppy->bs_factor = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404 set_capacity(floppy->disk, 0);
1405
1406 idefloppy_create_read_capacity_cmd(&pc);
1407 if (idefloppy_queue_pc_tail(drive, &pc)) {
1408 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1409 return 1;
1410 }
1411 header = (idefloppy_capacity_header_t *) pc.buffer;
1412 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
1413 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1414
1415 for (i = 0; i < descriptors; i++, descriptor++) {
1416 blocks = descriptor->blocks = ntohl(descriptor->blocks);
1417 length = descriptor->length = ntohs(descriptor->length);
1418
1419 if (!i)
1420 {
1421 switch (descriptor->dc) {
1422 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1423 case CAPACITY_UNFORMATTED:
1424 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1425 /*
1426 * If it is not a clik drive, break out
1427 * (maintains previous driver behaviour)
1428 */
1429 break;
1430 case CAPACITY_CURRENT:
1431 /* Normal Zip/LS-120 disks */
1432 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
1433 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1434 "sector size\n", drive->name,
1435 blocks * length / 1024, blocks, length);
1436 floppy->capacity = *descriptor;
1437 if (!length || length % 512) {
1438 printk(KERN_NOTICE "%s: %d bytes block size "
1439 "not supported\n", drive->name, length);
1440 } else {
1441 floppy->blocks = blocks;
1442 floppy->block_size = length;
1443 if ((floppy->bs_factor = length / 512) != 1)
1444 printk(KERN_NOTICE "%s: warning: non "
1445 "512 bytes block size not "
1446 "fully supported\n",
1447 drive->name);
1448 rc = 0;
1449 }
1450 break;
1451 case CAPACITY_NO_CARTRIDGE:
1452 /*
1453 * This is a KERN_ERR so it appears on screen
1454 * for the user to see
1455 */
1456 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1457 break;
1458 case CAPACITY_INVALID:
1459 printk(KERN_ERR "%s: Invalid capacity for disk "
1460 "in drive\n", drive->name);
1461 break;
1462 }
1463 }
1464 if (!i) {
1465 debug_log( "Descriptor 0 Code: %d\n",
1466 descriptor->dc);
1467 }
1468 debug_log( "Descriptor %d: %dkB, %d blocks, %d "
1469 "sector size\n", i, blocks * length / 1024, blocks,
1470 length);
1471 }
1472
1473 /* Clik! disk does not support get_flexible_disk_page */
1474 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1475 (void) idefloppy_get_flexible_disk_page(drive);
1476 }
1477
1478 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1479 return rc;
1480}
1481
1482/*
1483** Obtain the list of formattable capacities.
1484** Very similar to idefloppy_get_capacity, except that we push the capacity
1485** descriptors to userland, instead of our own structures.
1486**
1487** Userland gives us the following structure:
1488**
1489** struct idefloppy_format_capacities {
1490** int nformats;
1491** struct {
1492** int nblocks;
1493** int blocksize;
1494** } formats[];
1495** } ;
1496**
1497** userland initializes nformats to the number of allocated formats[]
1498** records. On exit we set nformats to the number of records we've
1499** actually initialized.
1500**
1501*/
1502
1503static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1504{
1505 idefloppy_pc_t pc;
1506 idefloppy_capacity_header_t *header;
1507 idefloppy_capacity_descriptor_t *descriptor;
1508 int i, descriptors, blocks, length;
1509 int u_array_size;
1510 int u_index;
1511 int __user *argp;
1512
1513 if (get_user(u_array_size, arg))
1514 return (-EFAULT);
1515
1516 if (u_array_size <= 0)
1517 return (-EINVAL);
1518
1519 idefloppy_create_read_capacity_cmd(&pc);
1520 if (idefloppy_queue_pc_tail(drive, &pc)) {
1521 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1522 return (-EIO);
1523 }
1524 header = (idefloppy_capacity_header_t *) pc.buffer;
1525 descriptors = header->length /
1526 sizeof(idefloppy_capacity_descriptor_t);
1527 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
1528
1529 u_index = 0;
1530 argp = arg + 1;
1531
1532 /*
1533 ** We always skip the first capacity descriptor. That's the
1534 ** current capacity. We are interested in the remaining descriptors,
1535 ** the formattable capacities.
1536 */
1537
1538 for (i=0; i<descriptors; i++, descriptor++) {
1539 if (u_index >= u_array_size)
1540 break; /* User-supplied buffer too small */
1541 if (i == 0)
1542 continue; /* Skip the first descriptor */
1543
1544 blocks = ntohl(descriptor->blocks);
1545 length = ntohs(descriptor->length);
1546
1547 if (put_user(blocks, argp))
1548 return(-EFAULT);
1549 ++argp;
1550
1551 if (put_user(length, argp))
1552 return (-EFAULT);
1553 ++argp;
1554
1555 ++u_index;
1556 }
1557
1558 if (put_user(u_index, arg))
1559 return (-EFAULT);
1560 return (0);
1561}
1562
1563/*
1564** Send ATAPI_FORMAT_UNIT to the drive.
1565**
1566** Userland gives us the following structure:
1567**
1568** struct idefloppy_format_command {
1569** int nblocks;
1570** int blocksize;
1571** int flags;
1572** } ;
1573**
1574** flags is a bitmask, currently, the only defined flag is:
1575**
1576** 0x01 - verify media after format.
1577*/
1578
1579static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
1580{
1581 int blocks;
1582 int length;
1583 int flags;
1584 idefloppy_pc_t pc;
1585
1586 if (get_user(blocks, arg) ||
1587 get_user(length, arg+1) ||
1588 get_user(flags, arg+2)) {
1589 return (-EFAULT);
1590 }
1591
1592 /* Get the SFRP bit */
1593 (void) idefloppy_get_capability_page(drive);
1594 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1595 if (idefloppy_queue_pc_tail(drive, &pc)) {
1596 return (-EIO);
1597 }
1598
1599 return (0);
1600}
1601
1602/*
1603** Get ATAPI_FORMAT_UNIT progress indication.
1604**
Matt LaPlante0779bf22006-11-30 05:24:39 +01001605** Userland gives a pointer to an int. The int is set to a progress
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606** indicator 0-65536, with 65536=100%.
1607**
1608** If the drive does not support format progress indication, we just check
1609** the dsc bit, and return either 0 or 65536.
1610*/
1611
1612static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1613{
1614 idefloppy_floppy_t *floppy = drive->driver_data;
1615 idefloppy_pc_t pc;
1616 int progress_indication = 0x10000;
1617
1618 if (floppy->srfp) {
1619 idefloppy_create_request_sense_cmd(&pc);
1620 if (idefloppy_queue_pc_tail(drive, &pc)) {
1621 return (-EIO);
1622 }
1623
1624 if (floppy->sense_key == 2 &&
1625 floppy->asc == 4 &&
1626 floppy->ascq == 4) {
1627 progress_indication = floppy->progress_indication;
1628 }
1629 /* Else assume format_unit has finished, and we're
1630 ** at 0x10000 */
1631 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632 unsigned long flags;
Bartlomiej Zolnierkiewicz22c525b2008-01-25 22:17:11 +01001633 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634
1635 local_irq_save(flags);
Bartlomiej Zolnierkiewicz22c525b2008-01-25 22:17:11 +01001636 stat = drive->hwif->INB(IDE_STATUS_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637 local_irq_restore(flags);
1638
Bartlomiej Zolnierkiewicz22c525b2008-01-25 22:17:11 +01001639 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001640 }
1641 if (put_user(progress_indication, arg))
1642 return (-EFAULT);
1643
1644 return (0);
1645}
1646
1647/*
1648 * Return the current floppy capacity.
1649 */
1650static sector_t idefloppy_capacity (ide_drive_t *drive)
1651{
1652 idefloppy_floppy_t *floppy = drive->driver_data;
1653 unsigned long capacity = floppy->blocks * floppy->bs_factor;
1654
1655 return capacity;
1656}
1657
1658/*
1659 * idefloppy_identify_device checks if we can support a drive,
1660 * based on the ATAPI IDENTIFY command results.
1661 */
1662static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
1663{
1664 struct idefloppy_id_gcw gcw;
1665#if IDEFLOPPY_DEBUG_INFO
1666 u16 mask,i;
1667 char buffer[80];
1668#endif /* IDEFLOPPY_DEBUG_INFO */
1669
1670 *((u16 *) &gcw) = id->config;
1671
1672#ifdef CONFIG_PPC
1673 /* kludge for Apple PowerBook internal zip */
1674 if ((gcw.device_type == 5) &&
1675 !strstr(id->model, "CD-ROM") &&
1676 strstr(id->model, "ZIP"))
1677 gcw.device_type = 0;
1678#endif
1679
1680#if IDEFLOPPY_DEBUG_INFO
1681 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
1682 switch (gcw.protocol) {
1683 case 0: case 1: sprintf(buffer, "ATA");break;
1684 case 2: sprintf(buffer, "ATAPI");break;
1685 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
1686 }
1687 printk(KERN_INFO "Protocol Type: %s\n", buffer);
1688 switch (gcw.device_type) {
1689 case 0: sprintf(buffer, "Direct-access Device");break;
1690 case 1: sprintf(buffer, "Streaming Tape Device");break;
1691 case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
1692 case 5: sprintf(buffer, "CD-ROM Device");break;
1693 case 6: sprintf(buffer, "Reserved");
1694 case 7: sprintf(buffer, "Optical memory Device");break;
1695 case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
1696 default: sprintf(buffer, "Reserved");
1697 }
1698 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
1699 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
1700 switch (gcw.drq_type) {
1701 case 0: sprintf(buffer, "Microprocessor DRQ");break;
1702 case 1: sprintf(buffer, "Interrupt DRQ");break;
1703 case 2: sprintf(buffer, "Accelerated DRQ");break;
1704 case 3: sprintf(buffer, "Reserved");break;
1705 }
1706 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
1707 switch (gcw.packet_size) {
1708 case 0: sprintf(buffer, "12 bytes");break;
1709 case 1: sprintf(buffer, "16 bytes");break;
1710 default: sprintf(buffer, "Reserved");break;
1711 }
1712 printk(KERN_INFO "Command Packet Size: %s\n", buffer);
1713 printk(KERN_INFO "Model: %.40s\n",id->model);
1714 printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev);
1715 printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no);
1716 printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512);
1717 printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
1718 printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
1719 printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
1720 printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
1721 printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
1722 printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO);
1723 printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA);
1724 printk(KERN_INFO "Single Word DMA supported modes:\n");
1725 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1726 if (id->dma_1word & mask)
1727 printk(KERN_INFO " Mode %d%s\n", i,
1728 (id->dma_1word & (mask << 8)) ? " (active)" : "");
1729 }
1730 printk(KERN_INFO "Multi Word DMA supported modes:\n");
1731 for (i=0,mask=1;i<8;i++,mask=mask << 1) {
1732 if (id->dma_mword & mask)
1733 printk(KERN_INFO " Mode %d%s\n", i,
1734 (id->dma_mword & (mask << 8)) ? " (active)" : "");
1735 }
1736 if (id->field_valid & 0x0002) {
1737 printk(KERN_INFO "Enhanced PIO Modes: %s\n",
1738 id->eide_pio_modes & 1 ? "Mode 3":"None");
1739 if (id->eide_dma_min == 0)
1740 sprintf(buffer, "Not supported");
1741 else
1742 sprintf(buffer, "%d ns",id->eide_dma_min);
1743 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer);
1744 if (id->eide_dma_time == 0)
1745 sprintf(buffer, "Not supported");
1746 else
1747 sprintf(buffer, "%d ns",id->eide_dma_time);
1748 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer);
1749 if (id->eide_pio == 0)
1750 sprintf(buffer, "Not supported");
1751 else
1752 sprintf(buffer, "%d ns",id->eide_pio);
1753 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n",
1754 buffer);
1755 if (id->eide_pio_iordy == 0)
1756 sprintf(buffer, "Not supported");
1757 else
1758 sprintf(buffer, "%d ns",id->eide_pio_iordy);
1759 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer);
1760 } else
1761 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n");
1762#endif /* IDEFLOPPY_DEBUG_INFO */
1763
1764 if (gcw.protocol != 2)
1765 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
1766 else if (gcw.device_type != 0)
1767 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
1768 else if (!gcw.removable)
1769 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1770 else if (gcw.drq_type == 3) {
1771 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
1772 } else if (gcw.packet_size != 0) {
1773 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
1774 } else
1775 return 1;
1776 return 0;
1777}
1778
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +02001779#ifdef CONFIG_IDE_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780static void idefloppy_add_settings(ide_drive_t *drive)
1781{
1782 idefloppy_floppy_t *floppy = drive->driver_data;
1783
1784/*
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +02001785 * drive setting name read/write data type min max mul_factor div_factor data pointer set function
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786 */
Bartlomiej Zolnierkiewicz14979432007-05-10 00:01:10 +02001787 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
1788 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
1789 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
1790 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001791}
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +02001792#else
1793static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1794#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795
1796/*
1797 * Driver initialization.
1798 */
1799static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1800{
1801 struct idefloppy_id_gcw gcw;
1802
1803 *((u16 *) &gcw) = drive->id->config;
1804 floppy->pc = floppy->pc_stack;
1805 if (gcw.drq_type == 1)
1806 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1807 /*
1808 * We used to check revisions here. At this point however
1809 * I'm giving up. Just assume they are all broken, its easier.
1810 *
1811 * The actual reason for the workarounds was likely
1812 * a driver bug after all rather than a firmware bug,
1813 * and the workaround below used to hide it. It should
1814 * be fixed as of version 1.9, but to be on the safe side
1815 * we'll leave the limitation below for the 2.2.x tree.
1816 */
1817
1818 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1819 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1820 /* This value will be visible in the /proc/ide/hdx/settings */
1821 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1822 blk_queue_max_sectors(drive->queue, 64);
1823 }
1824
1825 /*
1826 * Guess what? The IOMEGA Clik! drive also needs the
1827 * above fix. It makes nasty clicking noises without
1828 * it, so please don't remove this.
1829 */
1830 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1831 blk_queue_max_sectors(drive->queue, 64);
1832 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1833 }
1834
1835
1836 (void) idefloppy_get_capacity(drive);
1837 idefloppy_add_settings(drive);
1838}
1839
Russell King4031bbe2006-01-06 11:41:00 +00001840static void ide_floppy_remove(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841{
1842 idefloppy_floppy_t *floppy = drive->driver_data;
1843 struct gendisk *g = floppy->disk;
1844
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +02001845 ide_proc_unregister_driver(drive, floppy->driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846
1847 del_gendisk(g);
1848
1849 ide_floppy_put(floppy);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850}
1851
1852static void ide_floppy_release(struct kref *kref)
1853{
1854 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1855 ide_drive_t *drive = floppy->drive;
1856 struct gendisk *g = floppy->disk;
1857
1858 drive->driver_data = NULL;
1859 g->private_data = NULL;
1860 put_disk(g);
1861 kfree(floppy);
1862}
1863
Bartlomiej Zolnierkiewiczecfd80e2007-05-10 00:01:09 +02001864#ifdef CONFIG_IDE_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865static int proc_idefloppy_read_capacity
1866 (char *page, char **start, off_t off, int count, int *eof, void *data)
1867{
1868 ide_drive_t*drive = (ide_drive_t *)data;
1869 int len;
1870
1871 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1872 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1873}
1874
1875static ide_proc_entry_t idefloppy_proc[] = {
1876 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
1877 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
1878 { NULL, 0, NULL, NULL }
1879};
Bartlomiej Zolnierkiewiczecfd80e2007-05-10 00:01:09 +02001880#endif /* CONFIG_IDE_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881
Russell King4031bbe2006-01-06 11:41:00 +00001882static int ide_floppy_probe(ide_drive_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884static ide_driver_t idefloppy_driver = {
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001885 .gen_driver = {
Laurent Riffard4ef3b8f2005-11-18 22:15:40 +01001886 .owner = THIS_MODULE,
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001887 .name = "ide-floppy",
1888 .bus = &ide_bus_type,
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001889 },
Russell King4031bbe2006-01-06 11:41:00 +00001890 .probe = ide_floppy_probe,
1891 .remove = ide_floppy_remove,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001892 .version = IDEFLOPPY_VERSION,
1893 .media = ide_floppy,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894 .supports_dsc_overlap = 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895 .do_request = idefloppy_do_request,
1896 .end_request = idefloppy_do_end_request,
1897 .error = __ide_error,
1898 .abort = __ide_abort,
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +02001899#ifdef CONFIG_IDE_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900 .proc = idefloppy_proc,
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +02001901#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902};
1903
1904static int idefloppy_open(struct inode *inode, struct file *filp)
1905{
1906 struct gendisk *disk = inode->i_bdev->bd_disk;
1907 struct ide_floppy_obj *floppy;
1908 ide_drive_t *drive;
1909 idefloppy_pc_t pc;
1910 int ret = 0;
1911
1912 debug_log(KERN_INFO "Reached idefloppy_open\n");
1913
1914 if (!(floppy = ide_floppy_get(disk)))
1915 return -ENXIO;
1916
1917 drive = floppy->drive;
1918
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +01001919 floppy->openers++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +01001921 if (floppy->openers == 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1923 /* Just in case */
1924
1925 idefloppy_create_test_unit_ready_cmd(&pc);
1926 if (idefloppy_queue_pc_tail(drive, &pc)) {
1927 idefloppy_create_start_stop_cmd(&pc, 1);
1928 (void) idefloppy_queue_pc_tail(drive, &pc);
1929 }
1930
1931 if (idefloppy_get_capacity (drive)
1932 && (filp->f_flags & O_NDELAY) == 0
1933 /*
1934 ** Allow O_NDELAY to open a drive without a disk, or with
1935 ** an unreadable disk, so that we can get the format
1936 ** capacity of the drive or begin the format - Sam
1937 */
1938 ) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939 ret = -EIO;
1940 goto out_put_floppy;
1941 }
1942
1943 if (floppy->wp && (filp->f_mode & 2)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944 ret = -EROFS;
1945 goto out_put_floppy;
1946 }
1947 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1948 /* IOMEGA Clik! drives do not support lock/unlock commands */
1949 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1950 idefloppy_create_prevent_cmd(&pc, 1);
1951 (void) idefloppy_queue_pc_tail(drive, &pc);
1952 }
1953 check_disk_change(inode->i_bdev);
1954 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955 ret = -EBUSY;
1956 goto out_put_floppy;
1957 }
1958 return 0;
1959
1960out_put_floppy:
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +01001961 floppy->openers--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962 ide_floppy_put(floppy);
1963 return ret;
1964}
1965
1966static int idefloppy_release(struct inode *inode, struct file *filp)
1967{
1968 struct gendisk *disk = inode->i_bdev->bd_disk;
1969 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1970 ide_drive_t *drive = floppy->drive;
1971 idefloppy_pc_t pc;
1972
1973 debug_log(KERN_INFO "Reached idefloppy_release\n");
1974
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +01001975 if (floppy->openers == 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976 /* IOMEGA Clik! drives do not support lock/unlock commands */
1977 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1978 idefloppy_create_prevent_cmd(&pc, 0);
1979 (void) idefloppy_queue_pc_tail(drive, &pc);
1980 }
1981
1982 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1983 }
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +01001984
1985 floppy->openers--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001986
1987 ide_floppy_put(floppy);
1988
1989 return 0;
1990}
1991
Christoph Hellwiga885c8c2006-01-08 01:02:50 -08001992static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1993{
1994 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1995 ide_drive_t *drive = floppy->drive;
1996
1997 geo->heads = drive->bios_head;
1998 geo->sectors = drive->bios_sect;
1999 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
2000 return 0;
2001}
2002
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003static int idefloppy_ioctl(struct inode *inode, struct file *file,
2004 unsigned int cmd, unsigned long arg)
2005{
2006 struct block_device *bdev = inode->i_bdev;
2007 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
2008 ide_drive_t *drive = floppy->drive;
2009 void __user *argp = (void __user *)arg;
Ondrej Zary07203f62005-11-10 00:25:15 +01002010 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011 int prevent = (arg) ? 1 : 0;
2012 idefloppy_pc_t pc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013
2014 switch (cmd) {
2015 case CDROMEJECT:
2016 prevent = 0;
2017 /* fall through */
2018 case CDROM_LOCKDOOR:
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +01002019 if (floppy->openers > 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020 return -EBUSY;
2021
2022 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
2023 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
2024 idefloppy_create_prevent_cmd(&pc, prevent);
2025 (void) idefloppy_queue_pc_tail(drive, &pc);
2026 }
2027 if (cmd == CDROMEJECT) {
2028 idefloppy_create_start_stop_cmd(&pc, 2);
2029 (void) idefloppy_queue_pc_tail(drive, &pc);
2030 }
2031 return 0;
2032 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
2033 return 0;
2034 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
2035 return idefloppy_get_format_capacities(drive, argp);
2036 case IDEFLOPPY_IOCTL_FORMAT_START:
2037
2038 if (!(file->f_mode & 2))
2039 return -EPERM;
2040
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +01002041 if (floppy->openers > 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042 /* Don't format if someone is using the disk */
2043
2044 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
2045 &floppy->flags);
2046 return -EBUSY;
2047 }
2048
2049 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2050
2051 err = idefloppy_begin_format(drive, argp);
2052 if (err)
2053 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
2054 return err;
2055 /*
2056 ** Note, the bit will be cleared when the device is
2057 ** closed. This is the cleanest way to handle the
2058 ** situation where the drive does not support
2059 ** format progress reporting.
2060 */
2061 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
2062 return idefloppy_get_format_progress(drive, argp);
2063 }
Bartlomiej Zolnierkiewicz89636af2007-07-20 01:11:59 +02002064
2065 /*
2066 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
2067 * and CDROM_SEND_PACKET (legacy) ioctls
2068 */
2069 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
2070 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
2071 bdev->bd_disk, cmd, argp);
2072 else
2073 err = -ENOTTY;
2074
2075 if (err == -ENOTTY)
2076 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
2077
2078 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079}
2080
2081static int idefloppy_media_changed(struct gendisk *disk)
2082{
2083 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2084 ide_drive_t *drive = floppy->drive;
2085
2086 /* do not scan partitions twice if this is a removable device */
2087 if (drive->attach) {
2088 drive->attach = 0;
2089 return 0;
2090 }
2091 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
2092}
2093
2094static int idefloppy_revalidate_disk(struct gendisk *disk)
2095{
2096 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
2097 set_capacity(disk, idefloppy_capacity(floppy->drive));
2098 return 0;
2099}
2100
2101static struct block_device_operations idefloppy_ops = {
2102 .owner = THIS_MODULE,
2103 .open = idefloppy_open,
2104 .release = idefloppy_release,
2105 .ioctl = idefloppy_ioctl,
Christoph Hellwiga885c8c2006-01-08 01:02:50 -08002106 .getgeo = idefloppy_getgeo,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107 .media_changed = idefloppy_media_changed,
2108 .revalidate_disk= idefloppy_revalidate_disk
2109};
2110
Russell King4031bbe2006-01-06 11:41:00 +00002111static int ide_floppy_probe(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112{
2113 idefloppy_floppy_t *floppy;
2114 struct gendisk *g;
2115
2116 if (!strstr("ide-floppy", drive->driver_req))
2117 goto failed;
2118 if (!drive->present)
2119 goto failed;
2120 if (drive->media != ide_floppy)
2121 goto failed;
2122 if (!idefloppy_identify_device (drive, drive->id)) {
2123 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
2124 goto failed;
2125 }
2126 if (drive->scsi) {
2127 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
2128 goto failed;
2129 }
Robert P. J. Day5cbded52006-12-13 00:35:56 -08002130 if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
2132 goto failed;
2133 }
2134
2135 g = alloc_disk(1 << PARTN_BITS);
2136 if (!g)
2137 goto out_free_floppy;
2138
2139 ide_init_disk(g, drive);
2140
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +02002141 ide_proc_register_driver(drive, &idefloppy_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 kref_init(&floppy->kref);
2144
2145 floppy->drive = drive;
2146 floppy->driver = &idefloppy_driver;
2147 floppy->disk = g;
2148
2149 g->private_data = &floppy->driver;
2150
2151 drive->driver_data = floppy;
2152
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153 idefloppy_setup (drive, floppy);
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02002154
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155 g->minors = 1 << PARTN_BITS;
2156 g->driverfs_dev = &drive->gendev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
2158 g->fops = &idefloppy_ops;
2159 drive->attach = 1;
2160 add_disk(g);
2161 return 0;
2162
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163out_free_floppy:
2164 kfree(floppy);
2165failed:
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02002166 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167}
2168
2169MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
2170
2171static void __exit idefloppy_exit (void)
2172{
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02002173 driver_unregister(&idefloppy_driver.gen_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174}
2175
Bartlomiej Zolnierkiewicz17514e82005-11-19 22:24:35 +01002176static int __init idefloppy_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177{
2178 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02002179 return driver_register(&idefloppy_driver.gen_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002180}
2181
Kay Sievers263756e2005-12-12 18:03:44 +01002182MODULE_ALIAS("ide:*m-floppy*");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002183module_init(idefloppy_init);
2184module_exit(idefloppy_exit);
2185MODULE_LICENSE("GPL");