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Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus
[linux-btrfs-devel.git] / drivers / ide / ide-floppy.c
blob61fdf544fbd63193926010ff33fef34f9d30dbe9
1 /*
2 * IDE ATAPI floppy driver.
3 *
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
7 *
8 * This driver supports the following IDE floppy drives:
9 *
10 * LS-120/240 SuperDisk
11 * Iomega Zip 100/250
12 * Iomega PC Card Clik!/PocketZip
13 *
14 * For a historical changelog see
15 * Documentation/ide/ChangeLog.ide-floppy.1996-2002
16 */
17
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>
23 #include <linux/mm.h>
24 #include <linux/interrupt.h>
25 #include <linux/major.h>
26 #include <linux/errno.h>
27 #include <linux/genhd.h>
28 #include <linux/cdrom.h>
29 #include <linux/ide.h>
30 #include <linux/hdreg.h>
31 #include <linux/bitops.h>
32 #include <linux/mutex.h>
33 #include <linux/scatterlist.h>
34
35 #include <scsi/scsi_ioctl.h>
36
37 #include <asm/byteorder.h>
38 #include <linux/irq.h>
39 #include <linux/uaccess.h>
40 #include <linux/io.h>
41 #include <asm/unaligned.h>
42
43 #include "ide-floppy.h"
44
45 /*
46 * After each failed packet command we issue a request sense command and retry
47 * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
48 */
49 #define IDEFLOPPY_MAX_PC_RETRIES 3
50
51 /* format capacities descriptor codes */
52 #define CAPACITY_INVALID 0x00
53 #define CAPACITY_UNFORMATTED 0x01
54 #define CAPACITY_CURRENT 0x02
55 #define CAPACITY_NO_CARTRIDGE 0x03
56
57 /*
58 * The following delay solves a problem with ATAPI Zip 100 drive where BSY bit
59 * was apparently being deasserted before the unit was ready to receive data.
60 */
61 #define IDEFLOPPY_PC_DELAY (HZ/20) /* default delay for ZIP 100 (50ms) */
62
63 static int ide_floppy_callback(ide_drive_t *drive, int dsc)
64 {
65 struct ide_disk_obj *floppy = drive->driver_data;
66 struct ide_atapi_pc *pc = drive->pc;
67 struct request *rq = pc->rq;
68 int uptodate = pc->error ? 0 : 1;
69
70 ide_debug_log(IDE_DBG_FUNC, "enter");
71
72 if (drive->failed_pc == pc)
73 drive->failed_pc = NULL;
74
75 if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
76 rq->cmd_type == REQ_TYPE_BLOCK_PC)
77 uptodate = 1; /* FIXME */
78 else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
79
80 u8 *buf = bio_data(rq->bio);
81
82 if (!pc->error) {
83 floppy->sense_key = buf[2] & 0x0F;
84 floppy->asc = buf[12];
85 floppy->ascq = buf[13];
86 floppy->progress_indication = buf[15] & 0x80 ?
87 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
88
89 if (drive->failed_pc)
90 ide_debug_log(IDE_DBG_PC, "pc = %x",
91 drive->failed_pc->c[0]);
92
93 ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x,"
94 "ascq = %x", floppy->sense_key,
95 floppy->asc, floppy->ascq);
96 } else
97 printk(KERN_ERR PFX "Error in REQUEST SENSE itself - "
98 "Aborting request!\n");
99 }
100
101 if (rq->cmd_type == REQ_TYPE_SPECIAL)
102 rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
103
104 return uptodate;
105 }
106
107 static void ide_floppy_report_error(struct ide_disk_obj *floppy,
108 struct ide_atapi_pc *pc)
109 {
110 /* suppress error messages resulting from Medium not present */
111 if (floppy->sense_key == 0x02 &&
112 floppy->asc == 0x3a &&
113 floppy->ascq == 0x00)
114 return;
115
116 printk(KERN_ERR PFX "%s: I/O error, pc = %2x, key = %2x, "
117 "asc = %2x, ascq = %2x\n",
118 floppy->drive->name, pc->c[0], floppy->sense_key,
119 floppy->asc, floppy->ascq);
120
121 }
122
123 static ide_startstop_t ide_floppy_issue_pc(ide_drive_t *drive,
124 struct ide_cmd *cmd,
125 struct ide_atapi_pc *pc)
126 {
127 struct ide_disk_obj *floppy = drive->driver_data;
128
129 if (drive->failed_pc == NULL &&
130 pc->c[0] != GPCMD_REQUEST_SENSE)
131 drive->failed_pc = pc;
132
133 /* Set the current packet command */
134 drive->pc = pc;
135
136 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
137 unsigned int done = blk_rq_bytes(drive->hwif->rq);
138
139 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
140 ide_floppy_report_error(floppy, pc);
141
142 /* Giving up */
143 pc->error = IDE_DRV_ERROR_GENERAL;
144
145 drive->failed_pc = NULL;
146 drive->pc_callback(drive, 0);
147 ide_complete_rq(drive, -EIO, done);
148 return ide_stopped;
149 }
150
151 ide_debug_log(IDE_DBG_FUNC, "retry #%d", pc->retries);
152
153 pc->retries++;
154
155 return ide_issue_pc(drive, cmd);
156 }
157
158 void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
159 {
160 ide_init_pc(pc);
161 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
162 pc->c[7] = 255;
163 pc->c[8] = 255;
164 pc->req_xfer = 255;
165 }
166
167 /* A mode sense command is used to "sense" floppy parameters. */
168 void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
169 {
170 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
171
172 ide_init_pc(pc);
173 pc->c[0] = GPCMD_MODE_SENSE_10;
174 pc->c[1] = 0;
175 pc->c[2] = page_code;
176
177 switch (page_code) {
178 case IDEFLOPPY_CAPABILITIES_PAGE:
179 length += 12;
180 break;
181 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
182 length += 32;
183 break;
184 default:
185 printk(KERN_ERR PFX "unsupported page code in %s\n", __func__);
186 }
187 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
188 pc->req_xfer = length;
189 }
190
191 static void idefloppy_create_rw_cmd(ide_drive_t *drive,
192 struct ide_atapi_pc *pc, struct request *rq,
193 unsigned long sector)
194 {
195 struct ide_disk_obj *floppy = drive->driver_data;
196 int block = sector / floppy->bs_factor;
197 int blocks = blk_rq_sectors(rq) / floppy->bs_factor;
198 int cmd = rq_data_dir(rq);
199
200 ide_debug_log(IDE_DBG_FUNC, "block: %d, blocks: %d", block, blocks);
201
202 ide_init_pc(pc);
203 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
204 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
205 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
206
207 memcpy(rq->cmd, pc->c, 12);
208
209 pc->rq = rq;
210 if (rq->cmd_flags & REQ_WRITE)
211 pc->flags |= PC_FLAG_WRITING;
212
213 pc->flags |= PC_FLAG_DMA_OK;
214 }
215
216 static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
217 struct ide_atapi_pc *pc, struct request *rq)
218 {
219 ide_init_pc(pc);
220 memcpy(pc->c, rq->cmd, sizeof(pc->c));
221 pc->rq = rq;
222 if (blk_rq_bytes(rq)) {
223 pc->flags |= PC_FLAG_DMA_OK;
224 if (rq_data_dir(rq) == WRITE)
225 pc->flags |= PC_FLAG_WRITING;
226 }
227 }
228
229 static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
230 struct request *rq, sector_t block)
231 {
232 struct ide_disk_obj *floppy = drive->driver_data;
233 struct ide_cmd cmd;
234 struct ide_atapi_pc *pc;
235
236 ide_debug_log(IDE_DBG_FUNC, "enter, cmd: 0x%x\n", rq->cmd[0]);
237
238 if (drive->debug_mask & IDE_DBG_RQ)
239 blk_dump_rq_flags(rq, (rq->rq_disk
240 ? rq->rq_disk->disk_name
241 : "dev?"));
242
243 if (rq->errors >= ERROR_MAX) {
244 if (drive->failed_pc) {
245 ide_floppy_report_error(floppy, drive->failed_pc);
246 drive->failed_pc = NULL;
247 } else
248 printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
249
250 if (rq->cmd_type == REQ_TYPE_SPECIAL) {
251 rq->errors = 0;
252 ide_complete_rq(drive, 0, blk_rq_bytes(rq));
253 return ide_stopped;
254 } else
255 goto out_end;
256 }
257
258 switch (rq->cmd_type) {
259 case REQ_TYPE_FS:
260 if (((long)blk_rq_pos(rq) % floppy->bs_factor) ||
261 (blk_rq_sectors(rq) % floppy->bs_factor)) {
262 printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
263 drive->name);
264 goto out_end;
265 }
266 pc = &floppy->queued_pc;
267 idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
268 break;
269 case REQ_TYPE_SPECIAL:
270 case REQ_TYPE_SENSE:
271 pc = (struct ide_atapi_pc *)rq->special;
272 break;
273 case REQ_TYPE_BLOCK_PC:
274 pc = &floppy->queued_pc;
275 idefloppy_blockpc_cmd(floppy, pc, rq);
276 break;
277 default:
278 BUG();
279 }
280
281 ide_prep_sense(drive, rq);
282
283 memset(&cmd, 0, sizeof(cmd));
284
285 if (rq_data_dir(rq))
286 cmd.tf_flags |= IDE_TFLAG_WRITE;
287
288 cmd.rq = rq;
289
290 if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
291 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
292 ide_map_sg(drive, &cmd);
293 }
294
295 pc->rq = rq;
296
297 return ide_floppy_issue_pc(drive, &cmd, pc);
298 out_end:
299 drive->failed_pc = NULL;
300 if (rq->cmd_type != REQ_TYPE_FS && rq->errors == 0)
301 rq->errors = -EIO;
302 ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
303 return ide_stopped;
304 }
305
306 /*
307 * Look at the flexible disk page parameters. We ignore the CHS capacity
308 * parameters and use the LBA parameters instead.
309 */
310 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive,
311 struct ide_atapi_pc *pc)
312 {
313 struct ide_disk_obj *floppy = drive->driver_data;
314 struct gendisk *disk = floppy->disk;
315 u8 *page, buf[40];
316 int capacity, lba_capacity;
317 u16 transfer_rate, sector_size, cyls, rpm;
318 u8 heads, sectors;
319
320 ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
321
322 if (ide_queue_pc_tail(drive, disk, pc, buf, pc->req_xfer)) {
323 printk(KERN_ERR PFX "Can't get flexible disk page params\n");
324 return 1;
325 }
326
327 if (buf[3] & 0x80)
328 drive->dev_flags |= IDE_DFLAG_WP;
329 else
330 drive->dev_flags &= ~IDE_DFLAG_WP;
331
332 set_disk_ro(disk, !!(drive->dev_flags & IDE_DFLAG_WP));
333
334 page = &buf[8];
335
336 transfer_rate = be16_to_cpup((__be16 *)&buf[8 + 2]);
337 sector_size = be16_to_cpup((__be16 *)&buf[8 + 6]);
338 cyls = be16_to_cpup((__be16 *)&buf[8 + 8]);
339 rpm = be16_to_cpup((__be16 *)&buf[8 + 28]);
340 heads = buf[8 + 4];
341 sectors = buf[8 + 5];
342
343 capacity = cyls * heads * sectors * sector_size;
344
345 if (memcmp(page, &floppy->flexible_disk_page, 32))
346 printk(KERN_INFO PFX "%s: %dkB, %d/%d/%d CHS, %d kBps, "
347 "%d sector size, %d rpm\n",
348 drive->name, capacity / 1024, cyls, heads,
349 sectors, transfer_rate / 8, sector_size, rpm);
350
351 memcpy(&floppy->flexible_disk_page, page, 32);
352 drive->bios_cyl = cyls;
353 drive->bios_head = heads;
354 drive->bios_sect = sectors;
355 lba_capacity = floppy->blocks * floppy->block_size;
356
357 if (capacity < lba_capacity) {
358 printk(KERN_NOTICE PFX "%s: The disk reports a capacity of %d "
359 "bytes, but the drive only handles %d\n",
360 drive->name, lba_capacity, capacity);
361 floppy->blocks = floppy->block_size ?
362 capacity / floppy->block_size : 0;
363 drive->capacity64 = floppy->blocks * floppy->bs_factor;
364 }
365
366 return 0;
367 }
368
369 /*
370 * Determine if a media is present in the floppy drive, and if so, its LBA
371 * capacity.
372 */
373 static int ide_floppy_get_capacity(ide_drive_t *drive)
374 {
375 struct ide_disk_obj *floppy = drive->driver_data;
376 struct gendisk *disk = floppy->disk;
377 struct ide_atapi_pc pc;
378 u8 *cap_desc;
379 u8 pc_buf[256], header_len, desc_cnt;
380 int i, rc = 1, blocks, length;
381
382 ide_debug_log(IDE_DBG_FUNC, "enter");
383
384 drive->bios_cyl = 0;
385 drive->bios_head = drive->bios_sect = 0;
386 floppy->blocks = 0;
387 floppy->bs_factor = 1;
388 drive->capacity64 = 0;
389
390 ide_floppy_create_read_capacity_cmd(&pc);
391 if (ide_queue_pc_tail(drive, disk, &pc, pc_buf, pc.req_xfer)) {
392 printk(KERN_ERR PFX "Can't get floppy parameters\n");
393 return 1;
394 }
395 header_len = pc_buf[3];
396 cap_desc = &pc_buf[4];
397 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
398
399 for (i = 0; i < desc_cnt; i++) {
400 unsigned int desc_start = 4 + i*8;
401
402 blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]);
403 length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]);
404
405 ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
406 "%d sector size",
407 i, blocks * length / 1024,
408 blocks, length);
409
410 if (i)
411 continue;
412 /*
413 * the code below is valid only for the 1st descriptor, ie i=0
414 */
415
416 switch (pc_buf[desc_start + 4] & 0x03) {
417 /* Clik! drive returns this instead of CAPACITY_CURRENT */
418 case CAPACITY_UNFORMATTED:
419 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
420 /*
421 * If it is not a clik drive, break out
422 * (maintains previous driver behaviour)
423 */
424 break;
425 case CAPACITY_CURRENT:
426 /* Normal Zip/LS-120 disks */
427 if (memcmp(cap_desc, &floppy->cap_desc, 8))
428 printk(KERN_INFO PFX "%s: %dkB, %d blocks, %d "
429 "sector size\n",
430 drive->name, blocks * length / 1024,
431 blocks, length);
432 memcpy(&floppy->cap_desc, cap_desc, 8);
433
434 if (!length || length % 512) {
435 printk(KERN_NOTICE PFX "%s: %d bytes block size"
436 " not supported\n", drive->name, length);
437 } else {
438 floppy->blocks = blocks;
439 floppy->block_size = length;
440 floppy->bs_factor = length / 512;
441 if (floppy->bs_factor != 1)
442 printk(KERN_NOTICE PFX "%s: Warning: "
443 "non 512 bytes block size not "
444 "fully supported\n",
445 drive->name);
446 drive->capacity64 =
447 floppy->blocks * floppy->bs_factor;
448 rc = 0;
449 }
450 break;
451 case CAPACITY_NO_CARTRIDGE:
452 /*
453 * This is a KERN_ERR so it appears on screen
454 * for the user to see
455 */
456 printk(KERN_ERR PFX "%s: No disk in drive\n",
457 drive->name);
458 break;
459 case CAPACITY_INVALID:
460 printk(KERN_ERR PFX "%s: Invalid capacity for disk "
461 "in drive\n", drive->name);
462 break;
463 }
464 ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d",
465 pc_buf[desc_start + 4] & 0x03);
466 }
467
468 /* Clik! disk does not support get_flexible_disk_page */
469 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
470 (void) ide_floppy_get_flexible_disk_page(drive, &pc);
471
472 return rc;
473 }
474
475 static void ide_floppy_setup(ide_drive_t *drive)
476 {
477 struct ide_disk_obj *floppy = drive->driver_data;
478 u16 *id = drive->id;
479
480 drive->pc_callback = ide_floppy_callback;
481
482 /*
483 * We used to check revisions here. At this point however I'm giving up.
484 * Just assume they are all broken, its easier.
485 *
486 * The actual reason for the workarounds was likely a driver bug after
487 * all rather than a firmware bug, and the workaround below used to hide
488 * it. It should be fixed as of version 1.9, but to be on the safe side
489 * we'll leave the limitation below for the 2.2.x tree.
490 */
491 if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
492 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
493 /* This value will be visible in the /proc/ide/hdx/settings */
494 drive->pc_delay = IDEFLOPPY_PC_DELAY;
495 blk_queue_max_hw_sectors(drive->queue, 64);
496 }
497
498 /*
499 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
500 * nasty clicking noises without it, so please don't remove this.
501 */
502 if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
503 blk_queue_max_hw_sectors(drive->queue, 64);
504 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
505 /* IOMEGA Clik! drives do not support lock/unlock commands */
506 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
507 }
508
509 (void) ide_floppy_get_capacity(drive);
510
511 ide_proc_register_driver(drive, floppy->driver);
512
513 drive->dev_flags |= IDE_DFLAG_ATTACH;
514 }
515
516 static void ide_floppy_flush(ide_drive_t *drive)
517 {
518 }
519
520 static int ide_floppy_init_media(ide_drive_t *drive, struct gendisk *disk)
521 {
522 int ret = 0;
523
524 if (ide_do_test_unit_ready(drive, disk))
525 ide_do_start_stop(drive, disk, 1);
526
527 ret = ide_floppy_get_capacity(drive);
528
529 set_capacity(disk, ide_gd_capacity(drive));
530
531 return ret;
532 }
533
534 const struct ide_disk_ops ide_atapi_disk_ops = {
535 .check = ide_check_atapi_device,
536 .get_capacity = ide_floppy_get_capacity,
537 .setup = ide_floppy_setup,
538 .flush = ide_floppy_flush,
539 .init_media = ide_floppy_init_media,
540 .set_doorlock = ide_set_media_lock,
541 .do_request = ide_floppy_do_request,
542 .ioctl = ide_floppy_ioctl,
543 };
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