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gro: Allow tunnel stacking in the case of FOU/GUE
[linux/fpc-iii.git] / drivers / ide / ide-floppy.c
blob8c6363cdd2084a55ae4cfc9141e08cccde03c223
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/uaccess.h>
39 #include <linux/io.h>
40 #include <asm/unaligned.h>
41
42 #include "ide-floppy.h"
43
44 /*
45 * After each failed packet command we issue a request sense command and retry
46 * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
47 */
48 #define IDEFLOPPY_MAX_PC_RETRIES 3
49
50 /* format capacities descriptor codes */
51 #define CAPACITY_INVALID 0x00
52 #define CAPACITY_UNFORMATTED 0x01
53 #define CAPACITY_CURRENT 0x02
54 #define CAPACITY_NO_CARTRIDGE 0x03
55
56 /*
57 * The following delay solves a problem with ATAPI Zip 100 drive where BSY bit
58 * was apparently being deasserted before the unit was ready to receive data.
59 */
60 #define IDEFLOPPY_PC_DELAY (HZ/20) /* default delay for ZIP 100 (50ms) */
61
62 static int ide_floppy_callback(ide_drive_t *drive, int dsc)
63 {
64 struct ide_disk_obj *floppy = drive->driver_data;
65 struct ide_atapi_pc *pc = drive->pc;
66 struct request *rq = pc->rq;
67 int uptodate = pc->error ? 0 : 1;
68
69 ide_debug_log(IDE_DBG_FUNC, "enter");
70
71 if (drive->failed_pc == pc)
72 drive->failed_pc = NULL;
73
74 if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
75 rq->cmd_type == REQ_TYPE_BLOCK_PC)
76 uptodate = 1; /* FIXME */
77 else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
78
79 u8 *buf = bio_data(rq->bio);
80
81 if (!pc->error) {
82 floppy->sense_key = buf[2] & 0x0F;
83 floppy->asc = buf[12];
84 floppy->ascq = buf[13];
85 floppy->progress_indication = buf[15] & 0x80 ?
86 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
87
88 if (drive->failed_pc)
89 ide_debug_log(IDE_DBG_PC, "pc = %x",
90 drive->failed_pc->c[0]);
91
92 ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x,"
93 "ascq = %x", floppy->sense_key,
94 floppy->asc, floppy->ascq);
95 } else
96 printk(KERN_ERR PFX "Error in REQUEST SENSE itself - "
97 "Aborting request!\n");
98 }
99
100 if (rq->cmd_type == REQ_TYPE_SPECIAL)
101 rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
102
103 return uptodate;
104 }
105
106 static void ide_floppy_report_error(struct ide_disk_obj *floppy,
107 struct ide_atapi_pc *pc)
108 {
109 /* suppress error messages resulting from Medium not present */
110 if (floppy->sense_key == 0x02 &&
111 floppy->asc == 0x3a &&
112 floppy->ascq == 0x00)
113 return;
114
115 printk(KERN_ERR PFX "%s: I/O error, pc = %2x, key = %2x, "
116 "asc = %2x, ascq = %2x\n",
117 floppy->drive->name, pc->c[0], floppy->sense_key,
118 floppy->asc, floppy->ascq);
119
120 }
121
122 static ide_startstop_t ide_floppy_issue_pc(ide_drive_t *drive,
123 struct ide_cmd *cmd,
124 struct ide_atapi_pc *pc)
125 {
126 struct ide_disk_obj *floppy = drive->driver_data;
127
128 if (drive->failed_pc == NULL &&
129 pc->c[0] != GPCMD_REQUEST_SENSE)
130 drive->failed_pc = pc;
131
132 /* Set the current packet command */
133 drive->pc = pc;
134
135 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
136 unsigned int done = blk_rq_bytes(drive->hwif->rq);
137
138 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
139 ide_floppy_report_error(floppy, pc);
140
141 /* Giving up */
142 pc->error = IDE_DRV_ERROR_GENERAL;
143
144 drive->failed_pc = NULL;
145 drive->pc_callback(drive, 0);
146 ide_complete_rq(drive, -EIO, done);
147 return ide_stopped;
148 }
149
150 ide_debug_log(IDE_DBG_FUNC, "retry #%d", pc->retries);
151
152 pc->retries++;
153
154 return ide_issue_pc(drive, cmd);
155 }
156
157 void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
158 {
159 ide_init_pc(pc);
160 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
161 pc->c[7] = 255;
162 pc->c[8] = 255;
163 pc->req_xfer = 255;
164 }
165
166 /* A mode sense command is used to "sense" floppy parameters. */
167 void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
168 {
169 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
170
171 ide_init_pc(pc);
172 pc->c[0] = GPCMD_MODE_SENSE_10;
173 pc->c[1] = 0;
174 pc->c[2] = page_code;
175
176 switch (page_code) {
177 case IDEFLOPPY_CAPABILITIES_PAGE:
178 length += 12;
179 break;
180 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
181 length += 32;
182 break;
183 default:
184 printk(KERN_ERR PFX "unsupported page code in %s\n", __func__);
185 }
186 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
187 pc->req_xfer = length;
188 }
189
190 static void idefloppy_create_rw_cmd(ide_drive_t *drive,
191 struct ide_atapi_pc *pc, struct request *rq,
192 unsigned long sector)
193 {
194 struct ide_disk_obj *floppy = drive->driver_data;
195 int block = sector / floppy->bs_factor;
196 int blocks = blk_rq_sectors(rq) / floppy->bs_factor;
197 int cmd = rq_data_dir(rq);
198
199 ide_debug_log(IDE_DBG_FUNC, "block: %d, blocks: %d", block, blocks);
200
201 ide_init_pc(pc);
202 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
203 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
204 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
205
206 memcpy(rq->cmd, pc->c, 12);
207
208 pc->rq = rq;
209 if (rq->cmd_flags & REQ_WRITE)
210 pc->flags |= PC_FLAG_WRITING;
211
212 pc->flags |= PC_FLAG_DMA_OK;
213 }
214
215 static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
216 struct ide_atapi_pc *pc, struct request *rq)
217 {
218 ide_init_pc(pc);
219 memcpy(pc->c, rq->cmd, sizeof(pc->c));
220 pc->rq = rq;
221 if (blk_rq_bytes(rq)) {
222 pc->flags |= PC_FLAG_DMA_OK;
223 if (rq_data_dir(rq) == WRITE)
224 pc->flags |= PC_FLAG_WRITING;
225 }
226 }
227
228 static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
229 struct request *rq, sector_t block)
230 {
231 struct ide_disk_obj *floppy = drive->driver_data;
232 struct ide_cmd cmd;
233 struct ide_atapi_pc *pc;
234
235 ide_debug_log(IDE_DBG_FUNC, "enter, cmd: 0x%x\n", rq->cmd[0]);
236
237 if (drive->debug_mask & IDE_DBG_RQ)
238 blk_dump_rq_flags(rq, (rq->rq_disk
239 ? rq->rq_disk->disk_name
240 : "dev?"));
241
242 if (rq->errors >= ERROR_MAX) {
243 if (drive->failed_pc) {
244 ide_floppy_report_error(floppy, drive->failed_pc);
245 drive->failed_pc = NULL;
246 } else
247 printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
248
249 if (rq->cmd_type == REQ_TYPE_SPECIAL) {
250 rq->errors = 0;
251 ide_complete_rq(drive, 0, blk_rq_bytes(rq));
252 return ide_stopped;
253 } else
254 goto out_end;
255 }
256
257 switch (rq->cmd_type) {
258 case REQ_TYPE_FS:
259 if (((long)blk_rq_pos(rq) % floppy->bs_factor) ||
260 (blk_rq_sectors(rq) % floppy->bs_factor)) {
261 printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
262 drive->name);
263 goto out_end;
264 }
265 pc = &floppy->queued_pc;
266 idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
267 break;
268 case REQ_TYPE_SPECIAL:
269 case REQ_TYPE_SENSE:
270 pc = (struct ide_atapi_pc *)rq->special;
271 break;
272 case REQ_TYPE_BLOCK_PC:
273 pc = &floppy->queued_pc;
274 idefloppy_blockpc_cmd(floppy, pc, rq);
275 break;
276 default:
277 BUG();
278 }
279
280 ide_prep_sense(drive, rq);
281
282 memset(&cmd, 0, sizeof(cmd));
283
284 if (rq_data_dir(rq))
285 cmd.tf_flags |= IDE_TFLAG_WRITE;
286
287 cmd.rq = rq;
288
289 if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
290 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
291 ide_map_sg(drive, &cmd);
292 }
293
294 pc->rq = rq;
295
296 return ide_floppy_issue_pc(drive, &cmd, pc);
297 out_end:
298 drive->failed_pc = NULL;
299 if (rq->cmd_type != REQ_TYPE_FS && rq->errors == 0)
300 rq->errors = -EIO;
301 ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
302 return ide_stopped;
303 }
304
305 /*
306 * Look at the flexible disk page parameters. We ignore the CHS capacity
307 * parameters and use the LBA parameters instead.
308 */
309 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive,
310 struct ide_atapi_pc *pc)
311 {
312 struct ide_disk_obj *floppy = drive->driver_data;
313 struct gendisk *disk = floppy->disk;
314 u8 *page, buf[40];
315 int capacity, lba_capacity;
316 u16 transfer_rate, sector_size, cyls, rpm;
317 u8 heads, sectors;
318
319 ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
320
321 if (ide_queue_pc_tail(drive, disk, pc, buf, pc->req_xfer)) {
322 printk(KERN_ERR PFX "Can't get flexible disk page params\n");
323 return 1;
324 }
325
326 if (buf[3] & 0x80)
327 drive->dev_flags |= IDE_DFLAG_WP;
328 else
329 drive->dev_flags &= ~IDE_DFLAG_WP;
330
331 set_disk_ro(disk, !!(drive->dev_flags & IDE_DFLAG_WP));
332
333 page = &buf[8];
334
335 transfer_rate = be16_to_cpup((__be16 *)&buf[8 + 2]);
336 sector_size = be16_to_cpup((__be16 *)&buf[8 + 6]);
337 cyls = be16_to_cpup((__be16 *)&buf[8 + 8]);
338 rpm = be16_to_cpup((__be16 *)&buf[8 + 28]);
339 heads = buf[8 + 4];
340 sectors = buf[8 + 5];
341
342 capacity = cyls * heads * sectors * sector_size;
343
344 if (memcmp(page, &floppy->flexible_disk_page, 32))
345 printk(KERN_INFO PFX "%s: %dkB, %d/%d/%d CHS, %d kBps, "
346 "%d sector size, %d rpm\n",
347 drive->name, capacity / 1024, cyls, heads,
348 sectors, transfer_rate / 8, sector_size, rpm);
349
350 memcpy(&floppy->flexible_disk_page, page, 32);
351 drive->bios_cyl = cyls;
352 drive->bios_head = heads;
353 drive->bios_sect = sectors;
354 lba_capacity = floppy->blocks * floppy->block_size;
355
356 if (capacity < lba_capacity) {
357 printk(KERN_NOTICE PFX "%s: The disk reports a capacity of %d "
358 "bytes, but the drive only handles %d\n",
359 drive->name, lba_capacity, capacity);
360 floppy->blocks = floppy->block_size ?
361 capacity / floppy->block_size : 0;
362 drive->capacity64 = floppy->blocks * floppy->bs_factor;
363 }
364
365 return 0;
366 }
367
368 /*
369 * Determine if a media is present in the floppy drive, and if so, its LBA
370 * capacity.
371 */
372 static int ide_floppy_get_capacity(ide_drive_t *drive)
373 {
374 struct ide_disk_obj *floppy = drive->driver_data;
375 struct gendisk *disk = floppy->disk;
376 struct ide_atapi_pc pc;
377 u8 *cap_desc;
378 u8 pc_buf[256], header_len, desc_cnt;
379 int i, rc = 1, blocks, length;
380
381 ide_debug_log(IDE_DBG_FUNC, "enter");
382
383 drive->bios_cyl = 0;
384 drive->bios_head = drive->bios_sect = 0;
385 floppy->blocks = 0;
386 floppy->bs_factor = 1;
387 drive->capacity64 = 0;
388
389 ide_floppy_create_read_capacity_cmd(&pc);
390 if (ide_queue_pc_tail(drive, disk, &pc, pc_buf, pc.req_xfer)) {
391 printk(KERN_ERR PFX "Can't get floppy parameters\n");
392 return 1;
393 }
394 header_len = pc_buf[3];
395 cap_desc = &pc_buf[4];
396 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
397
398 for (i = 0; i < desc_cnt; i++) {
399 unsigned int desc_start = 4 + i*8;
400
401 blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]);
402 length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]);
403
404 ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
405 "%d sector size",
406 i, blocks * length / 1024,
407 blocks, length);
408
409 if (i)
410 continue;
411 /*
412 * the code below is valid only for the 1st descriptor, ie i=0
413 */
414
415 switch (pc_buf[desc_start + 4] & 0x03) {
416 /* Clik! drive returns this instead of CAPACITY_CURRENT */
417 case CAPACITY_UNFORMATTED:
418 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
419 /*
420 * If it is not a clik drive, break out
421 * (maintains previous driver behaviour)
422 */
423 break;
424 case CAPACITY_CURRENT:
425 /* Normal Zip/LS-120 disks */
426 if (memcmp(cap_desc, &floppy->cap_desc, 8))
427 printk(KERN_INFO PFX "%s: %dkB, %d blocks, %d "
428 "sector size\n",
429 drive->name, blocks * length / 1024,
430 blocks, length);
431 memcpy(&floppy->cap_desc, cap_desc, 8);
432
433 if (!length || length % 512) {
434 printk(KERN_NOTICE PFX "%s: %d bytes block size"
435 " not supported\n", drive->name, length);
436 } else {
437 floppy->blocks = blocks;
438 floppy->block_size = length;
439 floppy->bs_factor = length / 512;
440 if (floppy->bs_factor != 1)
441 printk(KERN_NOTICE PFX "%s: Warning: "
442 "non 512 bytes block size not "
443 "fully supported\n",
444 drive->name);
445 drive->capacity64 =
446 floppy->blocks * floppy->bs_factor;
447 rc = 0;
448 }
449 break;
450 case CAPACITY_NO_CARTRIDGE:
451 /*
452 * This is a KERN_ERR so it appears on screen
453 * for the user to see
454 */
455 printk(KERN_ERR PFX "%s: No disk in drive\n",
456 drive->name);
457 break;
458 case CAPACITY_INVALID:
459 printk(KERN_ERR PFX "%s: Invalid capacity for disk "
460 "in drive\n", drive->name);
461 break;
462 }
463 ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d",
464 pc_buf[desc_start + 4] & 0x03);
465 }
466
467 /* Clik! disk does not support get_flexible_disk_page */
468 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
469 (void) ide_floppy_get_flexible_disk_page(drive, &pc);
470
471 return rc;
472 }
473
474 static void ide_floppy_setup(ide_drive_t *drive)
475 {
476 struct ide_disk_obj *floppy = drive->driver_data;
477 u16 *id = drive->id;
478
479 drive->pc_callback = ide_floppy_callback;
480
481 /*
482 * We used to check revisions here. At this point however I'm giving up.
483 * Just assume they are all broken, its easier.
484 *
485 * The actual reason for the workarounds was likely a driver bug after
486 * all rather than a firmware bug, and the workaround below used to hide
487 * it. It should be fixed as of version 1.9, but to be on the safe side
488 * we'll leave the limitation below for the 2.2.x tree.
489 */
490 if (strstarts((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI")) {
491 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
492 /* This value will be visible in the /proc/ide/hdx/settings */
493 drive->pc_delay = IDEFLOPPY_PC_DELAY;
494 blk_queue_max_hw_sectors(drive->queue, 64);
495 }
496
497 /*
498 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
499 * nasty clicking noises without it, so please don't remove this.
500 */
501 if (strstarts((char *)&id[ATA_ID_PROD], "IOMEGA Clik!")) {
502 blk_queue_max_hw_sectors(drive->queue, 64);
503 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
504 /* IOMEGA Clik! drives do not support lock/unlock commands */
505 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
506 }
507
508 (void) ide_floppy_get_capacity(drive);
509
510 ide_proc_register_driver(drive, floppy->driver);
511
512 drive->dev_flags |= IDE_DFLAG_ATTACH;
513 }
514
515 static void ide_floppy_flush(ide_drive_t *drive)
516 {
517 }
518
519 static int ide_floppy_init_media(ide_drive_t *drive, struct gendisk *disk)
520 {
521 int ret = 0;
522
523 if (ide_do_test_unit_ready(drive, disk))
524 ide_do_start_stop(drive, disk, 1);
525
526 ret = ide_floppy_get_capacity(drive);
527
528 set_capacity(disk, ide_gd_capacity(drive));
529
530 return ret;
531 }
532
533 const struct ide_disk_ops ide_atapi_disk_ops = {
534 .check = ide_check_atapi_device,
535 .get_capacity = ide_floppy_get_capacity,
536 .setup = ide_floppy_setup,
537 .flush = ide_floppy_flush,
538 .init_media = ide_floppy_init_media,
539 .set_doorlock = ide_set_media_lock,
540 .do_request = ide_floppy_do_request,
541 .ioctl = ide_floppy_ioctl,
542 };
Linux with added FPC-III support