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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 && blk_pc_request(rq))) |
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 (blk_special_request(rq)) |
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 | /* supress 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_RW) |
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 (blk_special_request(rq)) { |
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 | if (blk_fs_request(rq)) { |
258 | if (((long)blk_rq_pos(rq) % floppy->bs_factor) || |
259 | (blk_rq_sectors(rq) % floppy->bs_factor)) { |
260 | printk(KERN_ERR PFX "%s: unsupported r/w rq size\n", |
261 | drive->name); |
262 | goto out_end; |
263 | } |
264 | pc = &floppy->queued_pc; |
265 | idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block); |
266 | } else if (blk_special_request(rq) || blk_sense_request(rq)) { |
267 | pc = (struct ide_atapi_pc *)rq->special; |
268 | } else if (blk_pc_request(rq)) { |
269 | pc = &floppy->queued_pc; |
270 | idefloppy_blockpc_cmd(floppy, pc, rq); |
271 | } else |
272 | BUG(); |
273 | |
274 | ide_prep_sense(drive, rq); |
275 | |
276 | memset(&cmd, 0, sizeof(cmd)); |
277 | |
278 | if (rq_data_dir(rq)) |
279 | cmd.tf_flags |= IDE_TFLAG_WRITE; |
280 | |
281 | cmd.rq = rq; |
282 | |
283 | if (blk_fs_request(rq) || blk_rq_bytes(rq)) { |
284 | ide_init_sg_cmd(&cmd, blk_rq_bytes(rq)); |
285 | ide_map_sg(drive, &cmd); |
286 | } |
287 | |
288 | pc->rq = rq; |
289 | |
290 | return ide_floppy_issue_pc(drive, &cmd, pc); |
291 | out_end: |
292 | drive->failed_pc = NULL; |
293 | if (blk_fs_request(rq) == 0 && rq->errors == 0) |
294 | rq->errors = -EIO; |
295 | ide_complete_rq(drive, -EIO, blk_rq_bytes(rq)); |
296 | return ide_stopped; |
297 | } |
298 | |
299 | /* |
300 | * Look at the flexible disk page parameters. We ignore the CHS capacity |
301 | * parameters and use the LBA parameters instead. |
302 | */ |
303 | static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive, |
304 | struct ide_atapi_pc *pc) |
305 | { |
306 | struct ide_disk_obj *floppy = drive->driver_data; |
307 | struct gendisk *disk = floppy->disk; |
308 | u8 *page, buf[40]; |
309 | int capacity, lba_capacity; |
310 | u16 transfer_rate, sector_size, cyls, rpm; |
311 | u8 heads, sectors; |
312 | |
313 | ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE); |
314 | |
315 | if (ide_queue_pc_tail(drive, disk, pc, buf, pc->req_xfer)) { |
316 | printk(KERN_ERR PFX "Can't get flexible disk page params\n"); |
317 | return 1; |
318 | } |
319 | |
320 | if (buf[3] & 0x80) |
321 | drive->dev_flags |= IDE_DFLAG_WP; |
322 | else |
323 | drive->dev_flags &= ~IDE_DFLAG_WP; |
324 | |
325 | set_disk_ro(disk, !!(drive->dev_flags & IDE_DFLAG_WP)); |
326 | |
327 | page = &buf[8]; |
328 | |
329 | transfer_rate = be16_to_cpup((__be16 *)&buf[8 + 2]); |
330 | sector_size = be16_to_cpup((__be16 *)&buf[8 + 6]); |
331 | cyls = be16_to_cpup((__be16 *)&buf[8 + 8]); |
332 | rpm = be16_to_cpup((__be16 *)&buf[8 + 28]); |
333 | heads = buf[8 + 4]; |
334 | sectors = buf[8 + 5]; |
335 | |
336 | capacity = cyls * heads * sectors * sector_size; |
337 | |
338 | if (memcmp(page, &floppy->flexible_disk_page, 32)) |
339 | printk(KERN_INFO PFX "%s: %dkB, %d/%d/%d CHS, %d kBps, " |
340 | "%d sector size, %d rpm\n", |
341 | drive->name, capacity / 1024, cyls, heads, |
342 | sectors, transfer_rate / 8, sector_size, rpm); |
343 | |
344 | memcpy(&floppy->flexible_disk_page, page, 32); |
345 | drive->bios_cyl = cyls; |
346 | drive->bios_head = heads; |
347 | drive->bios_sect = sectors; |
348 | lba_capacity = floppy->blocks * floppy->block_size; |
349 | |
350 | if (capacity < lba_capacity) { |
351 | printk(KERN_NOTICE PFX "%s: The disk reports a capacity of %d " |
352 | "bytes, but the drive only handles %d\n", |
353 | drive->name, lba_capacity, capacity); |
354 | floppy->blocks = floppy->block_size ? |
355 | capacity / floppy->block_size : 0; |
356 | drive->capacity64 = floppy->blocks * floppy->bs_factor; |
357 | } |
358 | |
359 | return 0; |
360 | } |
361 | |
362 | /* |
363 | * Determine if a media is present in the floppy drive, and if so, its LBA |
364 | * capacity. |
365 | */ |
366 | static int ide_floppy_get_capacity(ide_drive_t *drive) |
367 | { |
368 | struct ide_disk_obj *floppy = drive->driver_data; |
369 | struct gendisk *disk = floppy->disk; |
370 | struct ide_atapi_pc pc; |
371 | u8 *cap_desc; |
372 | u8 pc_buf[256], header_len, desc_cnt; |
373 | int i, rc = 1, blocks, length; |
374 | |
375 | ide_debug_log(IDE_DBG_FUNC, "enter"); |
376 | |
377 | drive->bios_cyl = 0; |
378 | drive->bios_head = drive->bios_sect = 0; |
379 | floppy->blocks = 0; |
380 | floppy->bs_factor = 1; |
381 | drive->capacity64 = 0; |
382 | |
383 | ide_floppy_create_read_capacity_cmd(&pc); |
384 | if (ide_queue_pc_tail(drive, disk, &pc, pc_buf, pc.req_xfer)) { |
385 | printk(KERN_ERR PFX "Can't get floppy parameters\n"); |
386 | return 1; |
387 | } |
388 | header_len = pc_buf[3]; |
389 | cap_desc = &pc_buf[4]; |
390 | desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ |
391 | |
392 | for (i = 0; i < desc_cnt; i++) { |
393 | unsigned int desc_start = 4 + i*8; |
394 | |
395 | blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]); |
396 | length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]); |
397 | |
398 | ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, " |
399 | "%d sector size", |
400 | i, blocks * length / 1024, |
401 | blocks, length); |
402 | |
403 | if (i) |
404 | continue; |
405 | /* |
406 | * the code below is valid only for the 1st descriptor, ie i=0 |
407 | */ |
408 | |
409 | switch (pc_buf[desc_start + 4] & 0x03) { |
410 | /* Clik! drive returns this instead of CAPACITY_CURRENT */ |
411 | case CAPACITY_UNFORMATTED: |
412 | if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) |
413 | /* |
414 | * If it is not a clik drive, break out |
415 | * (maintains previous driver behaviour) |
416 | */ |
417 | break; |
418 | case CAPACITY_CURRENT: |
419 | /* Normal Zip/LS-120 disks */ |
420 | if (memcmp(cap_desc, &floppy->cap_desc, 8)) |
421 | printk(KERN_INFO PFX "%s: %dkB, %d blocks, %d " |
422 | "sector size\n", |
423 | drive->name, blocks * length / 1024, |
424 | blocks, length); |
425 | memcpy(&floppy->cap_desc, cap_desc, 8); |
426 | |
427 | if (!length || length % 512) { |
428 | printk(KERN_NOTICE PFX "%s: %d bytes block size" |
429 | " not supported\n", drive->name, length); |
430 | } else { |
431 | floppy->blocks = blocks; |
432 | floppy->block_size = length; |
433 | floppy->bs_factor = length / 512; |
434 | if (floppy->bs_factor != 1) |
435 | printk(KERN_NOTICE PFX "%s: Warning: " |
436 | "non 512 bytes block size not " |
437 | "fully supported\n", |
438 | drive->name); |
439 | drive->capacity64 = |
440 | floppy->blocks * floppy->bs_factor; |
441 | rc = 0; |
442 | } |
443 | break; |
444 | case CAPACITY_NO_CARTRIDGE: |
445 | /* |
446 | * This is a KERN_ERR so it appears on screen |
447 | * for the user to see |
448 | */ |
449 | printk(KERN_ERR PFX "%s: No disk in drive\n", |
450 | drive->name); |
451 | break; |
452 | case CAPACITY_INVALID: |
453 | printk(KERN_ERR PFX "%s: Invalid capacity for disk " |
454 | "in drive\n", drive->name); |
455 | break; |
456 | } |
457 | ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d", |
458 | pc_buf[desc_start + 4] & 0x03); |
459 | } |
460 | |
461 | /* Clik! disk does not support get_flexible_disk_page */ |
462 | if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) |
463 | (void) ide_floppy_get_flexible_disk_page(drive, &pc); |
464 | |
465 | return rc; |
466 | } |
467 | |
468 | static void ide_floppy_setup(ide_drive_t *drive) |
469 | { |
470 | struct ide_disk_obj *floppy = drive->driver_data; |
471 | u16 *id = drive->id; |
472 | |
473 | drive->pc_callback = ide_floppy_callback; |
474 | |
475 | /* |
476 | * We used to check revisions here. At this point however I'm giving up. |
477 | * Just assume they are all broken, its easier. |
478 | * |
479 | * The actual reason for the workarounds was likely a driver bug after |
480 | * all rather than a firmware bug, and the workaround below used to hide |
481 | * it. It should be fixed as of version 1.9, but to be on the safe side |
482 | * we'll leave the limitation below for the 2.2.x tree. |
483 | */ |
484 | if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) { |
485 | drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE; |
486 | /* This value will be visible in the /proc/ide/hdx/settings */ |
487 | drive->pc_delay = IDEFLOPPY_PC_DELAY; |
488 | blk_queue_max_hw_sectors(drive->queue, 64); |
489 | } |
490 | |
491 | /* |
492 | * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes |
493 | * nasty clicking noises without it, so please don't remove this. |
494 | */ |
495 | if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) { |
496 | blk_queue_max_hw_sectors(drive->queue, 64); |
497 | drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE; |
498 | /* IOMEGA Clik! drives do not support lock/unlock commands */ |
499 | drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; |
500 | } |
501 | |
502 | (void) ide_floppy_get_capacity(drive); |
503 | |
504 | ide_proc_register_driver(drive, floppy->driver); |
505 | |
506 | drive->dev_flags |= IDE_DFLAG_ATTACH; |
507 | } |
508 | |
509 | static void ide_floppy_flush(ide_drive_t *drive) |
510 | { |
511 | } |
512 | |
513 | static int ide_floppy_init_media(ide_drive_t *drive, struct gendisk *disk) |
514 | { |
515 | int ret = 0; |
516 | |
517 | if (ide_do_test_unit_ready(drive, disk)) |
518 | ide_do_start_stop(drive, disk, 1); |
519 | |
520 | ret = ide_floppy_get_capacity(drive); |
521 | |
522 | set_capacity(disk, ide_gd_capacity(drive)); |
523 | |
524 | return ret; |
525 | } |
526 | |
527 | const struct ide_disk_ops ide_atapi_disk_ops = { |
528 | .check = ide_check_atapi_device, |
529 | .get_capacity = ide_floppy_get_capacity, |
530 | .setup = ide_floppy_setup, |
531 | .flush = ide_floppy_flush, |
532 | .init_media = ide_floppy_init_media, |
533 | .set_doorlock = ide_set_media_lock, |
534 | .do_request = ide_floppy_do_request, |
535 | .ioctl = ide_floppy_ioctl, |
536 | }; |
537 |
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