2 * IDE ATAPI floppy driver.
4 * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il>
5 * Copyright (C) 2000-2002 Paul Bristow <paul@paulbristow.net>
6 * Copyright (C) 2005 Bartlomiej Zolnierkiewicz
8 * This driver supports the following IDE floppy drives:
10 * LS-120/240 SuperDisk
12 * Iomega PC Card Clik!/PocketZip
14 * For a historical changelog see
15 * Documentation/ide/ChangeLog.ide-floppy.1996-2002
18 #include <linux/types.h>
19 #include <linux/string.h>
20 #include <linux/kernel.h>
21 #include <linux/delay.h>
22 #include <linux/timer.h>
24 #include <linux/interrupt.h>
25 #include <linux/major.h>
26 #include <linux/errno.h>
27 #include <linux/genhd.h>
28 #include <linux/slab.h>
29 #include <linux/cdrom.h>
30 #include <linux/ide.h>
31 #include <linux/hdreg.h>
32 #include <linux/bitops.h>
33 #include <linux/mutex.h>
34 #include <linux/scatterlist.h>
36 #include <scsi/scsi_ioctl.h>
38 #include <asm/byteorder.h>
39 #include <linux/irq.h>
40 #include <linux/uaccess.h>
42 #include <asm/unaligned.h>
44 #include "ide-floppy.h"
47 * After each failed packet command we issue a request sense command and retry
48 * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
50 #define IDEFLOPPY_MAX_PC_RETRIES 3
52 /* format capacities descriptor codes */
53 #define CAPACITY_INVALID 0x00
54 #define CAPACITY_UNFORMATTED 0x01
55 #define CAPACITY_CURRENT 0x02
56 #define CAPACITY_NO_CARTRIDGE 0x03
59 * The following delay solves a problem with ATAPI Zip 100 drive where BSY bit
60 * was apparently being deasserted before the unit was ready to receive data.
62 #define IDEFLOPPY_PC_DELAY (HZ/20) /* default delay for ZIP 100 (50ms) */
64 /* Error code returned in rq->errors to the higher part of the driver. */
65 #define IDEFLOPPY_ERROR_GENERAL 101
68 * Used to finish servicing a request. For read/write requests, we will call
69 * ide_end_request to pass to the next buffer.
71 static int ide_floppy_end_request(ide_drive_t
*drive
, int uptodate
, int nsecs
)
73 struct ide_disk_obj
*floppy
= drive
->driver_data
;
74 struct request
*rq
= drive
->hwif
->rq
;
77 ide_debug_log(IDE_DBG_FUNC
, "enter");
81 error
= IDEFLOPPY_ERROR_GENERAL
;
93 floppy
->failed_pc
= NULL
;
94 /* Why does this happen? */
97 if (!blk_special_request(rq
)) {
98 /* our real local end request function */
99 ide_end_request(drive
, uptodate
, nsecs
);
103 /* fixme: need to move this local also */
104 ide_complete_rq(drive
, 0);
108 static void idefloppy_update_buffers(ide_drive_t
*drive
,
109 struct ide_atapi_pc
*pc
)
111 struct request
*rq
= pc
->rq
;
112 struct bio
*bio
= rq
->bio
;
114 while ((bio
= rq
->bio
) != NULL
)
115 ide_floppy_end_request(drive
, 1, 0);
118 static void ide_floppy_callback(ide_drive_t
*drive
, int dsc
)
120 struct ide_disk_obj
*floppy
= drive
->driver_data
;
121 struct ide_atapi_pc
*pc
= drive
->pc
;
122 int uptodate
= pc
->error
? 0 : 1;
124 ide_debug_log(IDE_DBG_FUNC
, "enter");
126 if (floppy
->failed_pc
== pc
)
127 floppy
->failed_pc
= NULL
;
129 if (pc
->c
[0] == GPCMD_READ_10
|| pc
->c
[0] == GPCMD_WRITE_10
||
130 (pc
->rq
&& blk_pc_request(pc
->rq
)))
131 uptodate
= 1; /* FIXME */
132 else if (pc
->c
[0] == GPCMD_REQUEST_SENSE
) {
136 floppy
->sense_key
= buf
[2] & 0x0F;
137 floppy
->asc
= buf
[12];
138 floppy
->ascq
= buf
[13];
139 floppy
->progress_indication
= buf
[15] & 0x80 ?
140 (u16
)get_unaligned((u16
*)&buf
[16]) : 0x10000;
142 if (floppy
->failed_pc
)
143 ide_debug_log(IDE_DBG_PC
, "pc = %x",
144 floppy
->failed_pc
->c
[0]);
146 ide_debug_log(IDE_DBG_SENSE
, "sense key = %x, asc = %x,"
147 "ascq = %x", floppy
->sense_key
,
148 floppy
->asc
, floppy
->ascq
);
150 printk(KERN_ERR PFX
"Error in REQUEST SENSE itself - "
151 "Aborting request!\n");
154 ide_floppy_end_request(drive
, uptodate
, 0);
157 static void ide_floppy_report_error(struct ide_disk_obj
*floppy
,
158 struct ide_atapi_pc
*pc
)
160 /* supress error messages resulting from Medium not present */
161 if (floppy
->sense_key
== 0x02 &&
162 floppy
->asc
== 0x3a &&
163 floppy
->ascq
== 0x00)
166 printk(KERN_ERR PFX
"%s: I/O error, pc = %2x, key = %2x, "
167 "asc = %2x, ascq = %2x\n",
168 floppy
->drive
->name
, pc
->c
[0], floppy
->sense_key
,
169 floppy
->asc
, floppy
->ascq
);
173 static ide_startstop_t
idefloppy_issue_pc(ide_drive_t
*drive
,
174 struct ide_atapi_pc
*pc
)
176 struct ide_disk_obj
*floppy
= drive
->driver_data
;
178 if (floppy
->failed_pc
== NULL
&&
179 pc
->c
[0] != GPCMD_REQUEST_SENSE
)
180 floppy
->failed_pc
= pc
;
182 /* Set the current packet command */
185 if (pc
->retries
> IDEFLOPPY_MAX_PC_RETRIES
) {
186 if (!(pc
->flags
& PC_FLAG_SUPPRESS_ERROR
))
187 ide_floppy_report_error(floppy
, pc
);
189 pc
->error
= IDEFLOPPY_ERROR_GENERAL
;
191 floppy
->failed_pc
= NULL
;
192 drive
->pc_callback(drive
, 0);
196 ide_debug_log(IDE_DBG_FUNC
, "retry #%d", pc
->retries
);
200 return ide_issue_pc(drive
);
203 void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc
*pc
)
206 pc
->c
[0] = GPCMD_READ_FORMAT_CAPACITIES
;
212 /* A mode sense command is used to "sense" floppy parameters. */
213 void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc
*pc
, u8 page_code
)
215 u16 length
= 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
218 pc
->c
[0] = GPCMD_MODE_SENSE_10
;
220 pc
->c
[2] = page_code
;
223 case IDEFLOPPY_CAPABILITIES_PAGE
:
226 case IDEFLOPPY_FLEXIBLE_DISK_PAGE
:
230 printk(KERN_ERR PFX
"unsupported page code in %s\n", __func__
);
232 put_unaligned(cpu_to_be16(length
), (u16
*) &pc
->c
[7]);
233 pc
->req_xfer
= length
;
236 static void idefloppy_create_rw_cmd(ide_drive_t
*drive
,
237 struct ide_atapi_pc
*pc
, struct request
*rq
,
238 unsigned long sector
)
240 struct ide_disk_obj
*floppy
= drive
->driver_data
;
241 int block
= sector
/ floppy
->bs_factor
;
242 int blocks
= rq
->nr_sectors
/ floppy
->bs_factor
;
243 int cmd
= rq_data_dir(rq
);
245 ide_debug_log(IDE_DBG_FUNC
, "block: %d, blocks: %d", block
, blocks
);
248 pc
->c
[0] = cmd
== READ
? GPCMD_READ_10
: GPCMD_WRITE_10
;
249 put_unaligned(cpu_to_be16(blocks
), (unsigned short *)&pc
->c
[7]);
250 put_unaligned(cpu_to_be32(block
), (unsigned int *) &pc
->c
[2]);
252 memcpy(rq
->cmd
, pc
->c
, 12);
256 if (rq
->cmd_flags
& REQ_RW
)
257 pc
->flags
|= PC_FLAG_WRITING
;
259 pc
->req_xfer
= pc
->buf_size
= blocks
* floppy
->block_size
;
260 pc
->flags
|= PC_FLAG_DMA_OK
;
263 static void idefloppy_blockpc_cmd(struct ide_disk_obj
*floppy
,
264 struct ide_atapi_pc
*pc
, struct request
*rq
)
267 memcpy(pc
->c
, rq
->cmd
, sizeof(pc
->c
));
270 if (rq
->data_len
&& rq_data_dir(rq
) == WRITE
)
271 pc
->flags
|= PC_FLAG_WRITING
;
274 pc
->flags
|= PC_FLAG_DMA_OK
;
276 * possibly problematic, doesn't look like ide-floppy correctly
277 * handled scattered requests if dma fails...
279 pc
->req_xfer
= pc
->buf_size
= rq
->data_len
;
282 static ide_startstop_t
ide_floppy_do_request(ide_drive_t
*drive
,
283 struct request
*rq
, sector_t block
)
285 struct ide_disk_obj
*floppy
= drive
->driver_data
;
286 ide_hwif_t
*hwif
= drive
->hwif
;
287 struct ide_atapi_pc
*pc
;
289 if (drive
->debug_mask
& IDE_DBG_RQ
)
290 blk_dump_rq_flags(rq
, (rq
->rq_disk
291 ? rq
->rq_disk
->disk_name
294 if (rq
->errors
>= ERROR_MAX
) {
295 if (floppy
->failed_pc
)
296 ide_floppy_report_error(floppy
, floppy
->failed_pc
);
298 printk(KERN_ERR PFX
"%s: I/O error\n", drive
->name
);
300 ide_floppy_end_request(drive
, 0, 0);
303 if (blk_fs_request(rq
)) {
304 if (((long)rq
->sector
% floppy
->bs_factor
) ||
305 (rq
->nr_sectors
% floppy
->bs_factor
)) {
306 printk(KERN_ERR PFX
"%s: unsupported r/w rq size\n",
308 ide_floppy_end_request(drive
, 0, 0);
311 pc
= &floppy
->queued_pc
;
312 idefloppy_create_rw_cmd(drive
, pc
, rq
, (unsigned long)block
);
313 } else if (blk_special_request(rq
)) {
314 pc
= (struct ide_atapi_pc
*) rq
->buffer
;
315 } else if (blk_pc_request(rq
)) {
316 pc
= &floppy
->queued_pc
;
317 idefloppy_blockpc_cmd(floppy
, pc
, rq
);
319 blk_dump_rq_flags(rq
, PFX
"unsupported command in queue");
320 ide_floppy_end_request(drive
, 0, 0);
324 if (blk_fs_request(rq
) || pc
->req_xfer
) {
325 ide_init_sg_cmd(drive
, rq
);
326 ide_map_sg(drive
, rq
);
329 pc
->sg
= hwif
->sg_table
;
330 pc
->sg_cnt
= hwif
->sg_nents
;
334 return idefloppy_issue_pc(drive
, pc
);
338 * Look at the flexible disk page parameters. We ignore the CHS capacity
339 * parameters and use the LBA parameters instead.
341 static int ide_floppy_get_flexible_disk_page(ide_drive_t
*drive
,
342 struct ide_atapi_pc
*pc
)
344 struct ide_disk_obj
*floppy
= drive
->driver_data
;
345 struct gendisk
*disk
= floppy
->disk
;
347 int capacity
, lba_capacity
;
348 u16 transfer_rate
, sector_size
, cyls
, rpm
;
351 ide_floppy_create_mode_sense_cmd(pc
, IDEFLOPPY_FLEXIBLE_DISK_PAGE
);
353 if (ide_queue_pc_tail(drive
, disk
, pc
)) {
354 printk(KERN_ERR PFX
"Can't get flexible disk page params\n");
358 if (pc
->buf
[3] & 0x80)
359 drive
->dev_flags
|= IDE_DFLAG_WP
;
361 drive
->dev_flags
&= ~IDE_DFLAG_WP
;
363 set_disk_ro(disk
, !!(drive
->dev_flags
& IDE_DFLAG_WP
));
367 transfer_rate
= be16_to_cpup((__be16
*)&pc
->buf
[8 + 2]);
368 sector_size
= be16_to_cpup((__be16
*)&pc
->buf
[8 + 6]);
369 cyls
= be16_to_cpup((__be16
*)&pc
->buf
[8 + 8]);
370 rpm
= be16_to_cpup((__be16
*)&pc
->buf
[8 + 28]);
371 heads
= pc
->buf
[8 + 4];
372 sectors
= pc
->buf
[8 + 5];
374 capacity
= cyls
* heads
* sectors
* sector_size
;
376 if (memcmp(page
, &floppy
->flexible_disk_page
, 32))
377 printk(KERN_INFO PFX
"%s: %dkB, %d/%d/%d CHS, %d kBps, "
378 "%d sector size, %d rpm\n",
379 drive
->name
, capacity
/ 1024, cyls
, heads
,
380 sectors
, transfer_rate
/ 8, sector_size
, rpm
);
382 memcpy(&floppy
->flexible_disk_page
, page
, 32);
383 drive
->bios_cyl
= cyls
;
384 drive
->bios_head
= heads
;
385 drive
->bios_sect
= sectors
;
386 lba_capacity
= floppy
->blocks
* floppy
->block_size
;
388 if (capacity
< lba_capacity
) {
389 printk(KERN_NOTICE PFX
"%s: The disk reports a capacity of %d "
390 "bytes, but the drive only handles %d\n",
391 drive
->name
, lba_capacity
, capacity
);
392 floppy
->blocks
= floppy
->block_size
?
393 capacity
/ floppy
->block_size
: 0;
394 drive
->capacity64
= floppy
->blocks
* floppy
->bs_factor
;
401 * Determine if a media is present in the floppy drive, and if so, its LBA
404 static int ide_floppy_get_capacity(ide_drive_t
*drive
)
406 struct ide_disk_obj
*floppy
= drive
->driver_data
;
407 struct gendisk
*disk
= floppy
->disk
;
408 struct ide_atapi_pc pc
;
410 u8 header_len
, desc_cnt
;
411 int i
, rc
= 1, blocks
, length
;
414 drive
->bios_head
= drive
->bios_sect
= 0;
416 floppy
->bs_factor
= 1;
417 drive
->capacity64
= 0;
419 ide_floppy_create_read_capacity_cmd(&pc
);
420 if (ide_queue_pc_tail(drive
, disk
, &pc
)) {
421 printk(KERN_ERR PFX
"Can't get floppy parameters\n");
424 header_len
= pc
.buf
[3];
425 cap_desc
= &pc
.buf
[4];
426 desc_cnt
= header_len
/ 8; /* capacity descriptor of 8 bytes */
428 for (i
= 0; i
< desc_cnt
; i
++) {
429 unsigned int desc_start
= 4 + i
*8;
431 blocks
= be32_to_cpup((__be32
*)&pc
.buf
[desc_start
]);
432 length
= be16_to_cpup((__be16
*)&pc
.buf
[desc_start
+ 6]);
434 ide_debug_log(IDE_DBG_PROBE
, "Descriptor %d: %dkB, %d blocks, "
436 i
, blocks
* length
/ 1024,
442 * the code below is valid only for the 1st descriptor, ie i=0
445 switch (pc
.buf
[desc_start
+ 4] & 0x03) {
446 /* Clik! drive returns this instead of CAPACITY_CURRENT */
447 case CAPACITY_UNFORMATTED
:
448 if (!(drive
->atapi_flags
& IDE_AFLAG_CLIK_DRIVE
))
450 * If it is not a clik drive, break out
451 * (maintains previous driver behaviour)
454 case CAPACITY_CURRENT
:
455 /* Normal Zip/LS-120 disks */
456 if (memcmp(cap_desc
, &floppy
->cap_desc
, 8))
457 printk(KERN_INFO PFX
"%s: %dkB, %d blocks, %d "
459 drive
->name
, blocks
* length
/ 1024,
461 memcpy(&floppy
->cap_desc
, cap_desc
, 8);
463 if (!length
|| length
% 512) {
464 printk(KERN_NOTICE PFX
"%s: %d bytes block size"
465 " not supported\n", drive
->name
, length
);
467 floppy
->blocks
= blocks
;
468 floppy
->block_size
= length
;
469 floppy
->bs_factor
= length
/ 512;
470 if (floppy
->bs_factor
!= 1)
471 printk(KERN_NOTICE PFX
"%s: Warning: "
472 "non 512 bytes block size not "
476 floppy
->blocks
* floppy
->bs_factor
;
480 case CAPACITY_NO_CARTRIDGE
:
482 * This is a KERN_ERR so it appears on screen
483 * for the user to see
485 printk(KERN_ERR PFX
"%s: No disk in drive\n",
488 case CAPACITY_INVALID
:
489 printk(KERN_ERR PFX
"%s: Invalid capacity for disk "
490 "in drive\n", drive
->name
);
493 ide_debug_log(IDE_DBG_PROBE
, "Descriptor 0 Code: %d",
494 pc
.buf
[desc_start
+ 4] & 0x03);
497 /* Clik! disk does not support get_flexible_disk_page */
498 if (!(drive
->atapi_flags
& IDE_AFLAG_CLIK_DRIVE
))
499 (void) ide_floppy_get_flexible_disk_page(drive
, &pc
);
504 static void ide_floppy_setup(ide_drive_t
*drive
)
506 struct ide_disk_obj
*floppy
= drive
->driver_data
;
509 drive
->pc_callback
= ide_floppy_callback
;
510 drive
->pc_update_buffers
= idefloppy_update_buffers
;
511 drive
->pc_io_buffers
= ide_io_buffers
;
514 * We used to check revisions here. At this point however I'm giving up.
515 * Just assume they are all broken, its easier.
517 * The actual reason for the workarounds was likely a driver bug after
518 * all rather than a firmware bug, and the workaround below used to hide
519 * it. It should be fixed as of version 1.9, but to be on the safe side
520 * we'll leave the limitation below for the 2.2.x tree.
522 if (!strncmp((char *)&id
[ATA_ID_PROD
], "IOMEGA ZIP 100 ATAPI", 20)) {
523 drive
->atapi_flags
|= IDE_AFLAG_ZIP_DRIVE
;
524 /* This value will be visible in the /proc/ide/hdx/settings */
525 drive
->pc_delay
= IDEFLOPPY_PC_DELAY
;
526 blk_queue_max_sectors(drive
->queue
, 64);
530 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
531 * nasty clicking noises without it, so please don't remove this.
533 if (strncmp((char *)&id
[ATA_ID_PROD
], "IOMEGA Clik!", 11) == 0) {
534 blk_queue_max_sectors(drive
->queue
, 64);
535 drive
->atapi_flags
|= IDE_AFLAG_CLIK_DRIVE
;
536 /* IOMEGA Clik! drives do not support lock/unlock commands */
537 drive
->dev_flags
&= ~IDE_DFLAG_DOORLOCKING
;
540 (void) ide_floppy_get_capacity(drive
);
542 ide_proc_register_driver(drive
, floppy
->driver
);
544 drive
->dev_flags
|= IDE_DFLAG_ATTACH
;
547 static void ide_floppy_flush(ide_drive_t
*drive
)
551 static int ide_floppy_init_media(ide_drive_t
*drive
, struct gendisk
*disk
)
555 if (ide_do_test_unit_ready(drive
, disk
))
556 ide_do_start_stop(drive
, disk
, 1);
558 ret
= ide_floppy_get_capacity(drive
);
560 set_capacity(disk
, ide_gd_capacity(drive
));
565 const struct ide_disk_ops ide_atapi_disk_ops
= {
566 .check
= ide_check_atapi_device
,
567 .get_capacity
= ide_floppy_get_capacity
,
568 .setup
= ide_floppy_setup
,
569 .flush
= ide_floppy_flush
,
570 .init_media
= ide_floppy_init_media
,
571 .set_doorlock
= ide_set_media_lock
,
572 .do_request
= ide_floppy_do_request
,
573 .end_request
= ide_floppy_end_request
,
574 .ioctl
= ide_floppy_ioctl
,