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1 | /* |
2 | * cdrom.c IOCTLs handling for ide-cd driver. |
3 | * |
4 | * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov> |
5 | * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org> |
6 | * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de> |
7 | */ |
8 | |
9 | #include <linux/kernel.h> |
10 | #include <linux/cdrom.h> |
11 | #include <linux/gfp.h> |
12 | #include <linux/ide.h> |
13 | #include <scsi/scsi.h> |
14 | |
15 | #include "ide-cd.h" |
16 | |
17 | /**************************************************************************** |
18 | * Other driver requests (open, close, check media change). |
19 | */ |
20 | int ide_cdrom_open_real(struct cdrom_device_info *cdi, int purpose) |
21 | { |
22 | return 0; |
23 | } |
24 | |
25 | /* |
26 | * Close down the device. Invalidate all cached blocks. |
27 | */ |
28 | void ide_cdrom_release_real(struct cdrom_device_info *cdi) |
29 | { |
30 | ide_drive_t *drive = cdi->handle; |
31 | |
32 | if (!cdi->use_count) |
33 | drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID; |
34 | } |
35 | |
36 | /* |
37 | * add logic to try GET_EVENT command first to check for media and tray |
38 | * status. this should be supported by newer cd-r/w and all DVD etc |
39 | * drives |
40 | */ |
41 | int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr) |
42 | { |
43 | ide_drive_t *drive = cdi->handle; |
44 | struct media_event_desc med; |
45 | struct request_sense sense; |
46 | int stat; |
47 | |
48 | if (slot_nr != CDSL_CURRENT) |
49 | return -EINVAL; |
50 | |
51 | stat = cdrom_check_status(drive, &sense); |
52 | if (!stat || sense.sense_key == UNIT_ATTENTION) |
53 | return CDS_DISC_OK; |
54 | |
55 | if (!cdrom_get_media_event(cdi, &med)) { |
56 | if (med.media_present) |
57 | return CDS_DISC_OK; |
58 | else if (med.door_open) |
59 | return CDS_TRAY_OPEN; |
60 | else |
61 | return CDS_NO_DISC; |
62 | } |
63 | |
64 | if (sense.sense_key == NOT_READY && sense.asc == 0x04 |
65 | && sense.ascq == 0x04) |
66 | return CDS_DISC_OK; |
67 | |
68 | /* |
69 | * If not using Mt Fuji extended media tray reports, |
70 | * just return TRAY_OPEN since ATAPI doesn't provide |
71 | * any other way to detect this... |
72 | */ |
73 | if (sense.sense_key == NOT_READY) { |
74 | if (sense.asc == 0x3a && sense.ascq == 1) |
75 | return CDS_NO_DISC; |
76 | else |
77 | return CDS_TRAY_OPEN; |
78 | } |
79 | return CDS_DRIVE_NOT_READY; |
80 | } |
81 | |
82 | /* |
83 | * ide-cd always generates media changed event if media is missing, which |
84 | * makes it impossible to use for proper event reporting, so disk->events |
85 | * is cleared to 0 and the following function is used only to trigger |
86 | * revalidation and never propagated to userland. |
87 | */ |
88 | unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *cdi, |
89 | unsigned int clearing, int slot_nr) |
90 | { |
91 | ide_drive_t *drive = cdi->handle; |
92 | int retval; |
93 | |
94 | if (slot_nr == CDSL_CURRENT) { |
95 | (void) cdrom_check_status(drive, NULL); |
96 | retval = (drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED) ? 1 : 0; |
97 | drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED; |
98 | return retval ? DISK_EVENT_MEDIA_CHANGE : 0; |
99 | } else { |
100 | return 0; |
101 | } |
102 | } |
103 | |
104 | /* Eject the disk if EJECTFLAG is 0. |
105 | If EJECTFLAG is 1, try to reload the disk. */ |
106 | static |
107 | int cdrom_eject(ide_drive_t *drive, int ejectflag, |
108 | struct request_sense *sense) |
109 | { |
110 | struct cdrom_info *cd = drive->driver_data; |
111 | struct cdrom_device_info *cdi = &cd->devinfo; |
112 | char loej = 0x02; |
113 | unsigned char cmd[BLK_MAX_CDB]; |
114 | |
115 | if ((drive->atapi_flags & IDE_AFLAG_NO_EJECT) && !ejectflag) |
116 | return -EDRIVE_CANT_DO_THIS; |
117 | |
118 | /* reload fails on some drives, if the tray is locked */ |
119 | if ((drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED) && ejectflag) |
120 | return 0; |
121 | |
122 | /* only tell drive to close tray if open, if it can do that */ |
123 | if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY)) |
124 | loej = 0; |
125 | |
126 | memset(cmd, 0, BLK_MAX_CDB); |
127 | |
128 | cmd[0] = GPCMD_START_STOP_UNIT; |
129 | cmd[4] = loej | (ejectflag != 0); |
130 | |
131 | return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, 0); |
132 | } |
133 | |
134 | /* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */ |
135 | static |
136 | int ide_cd_lockdoor(ide_drive_t *drive, int lockflag, |
137 | struct request_sense *sense) |
138 | { |
139 | struct request_sense my_sense; |
140 | int stat; |
141 | |
142 | if (sense == NULL) |
143 | sense = &my_sense; |
144 | |
145 | /* If the drive cannot lock the door, just pretend. */ |
146 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) { |
147 | stat = 0; |
148 | } else { |
149 | unsigned char cmd[BLK_MAX_CDB]; |
150 | |
151 | memset(cmd, 0, BLK_MAX_CDB); |
152 | |
153 | cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL; |
154 | cmd[4] = lockflag ? 1 : 0; |
155 | |
156 | stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, |
157 | sense, 0, 0); |
158 | } |
159 | |
160 | /* If we got an illegal field error, the drive |
161 | probably cannot lock the door. */ |
162 | if (stat != 0 && |
163 | sense->sense_key == ILLEGAL_REQUEST && |
164 | (sense->asc == 0x24 || sense->asc == 0x20)) { |
165 | printk(KERN_ERR "%s: door locking not supported\n", |
166 | drive->name); |
167 | drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; |
168 | stat = 0; |
169 | } |
170 | |
171 | /* no medium, that's alright. */ |
172 | if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a) |
173 | stat = 0; |
174 | |
175 | if (stat == 0) { |
176 | if (lockflag) |
177 | drive->atapi_flags |= IDE_AFLAG_DOOR_LOCKED; |
178 | else |
179 | drive->atapi_flags &= ~IDE_AFLAG_DOOR_LOCKED; |
180 | } |
181 | |
182 | return stat; |
183 | } |
184 | |
185 | int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position) |
186 | { |
187 | ide_drive_t *drive = cdi->handle; |
188 | struct request_sense sense; |
189 | |
190 | if (position) { |
191 | int stat = ide_cd_lockdoor(drive, 0, &sense); |
192 | |
193 | if (stat) |
194 | return stat; |
195 | } |
196 | |
197 | return cdrom_eject(drive, !position, &sense); |
198 | } |
199 | |
200 | int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock) |
201 | { |
202 | ide_drive_t *drive = cdi->handle; |
203 | |
204 | return ide_cd_lockdoor(drive, lock, NULL); |
205 | } |
206 | |
207 | /* |
208 | * ATAPI devices are free to select the speed you request or any slower |
209 | * rate. :-( Requesting too fast a speed will _not_ produce an error. |
210 | */ |
211 | int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed) |
212 | { |
213 | ide_drive_t *drive = cdi->handle; |
214 | struct cdrom_info *cd = drive->driver_data; |
215 | struct request_sense sense; |
216 | u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; |
217 | int stat; |
218 | unsigned char cmd[BLK_MAX_CDB]; |
219 | |
220 | if (speed == 0) |
221 | speed = 0xffff; /* set to max */ |
222 | else |
223 | speed *= 177; /* Nx to kbytes/s */ |
224 | |
225 | memset(cmd, 0, BLK_MAX_CDB); |
226 | |
227 | cmd[0] = GPCMD_SET_SPEED; |
228 | /* Read Drive speed in kbytes/second MSB/LSB */ |
229 | cmd[2] = (speed >> 8) & 0xff; |
230 | cmd[3] = speed & 0xff; |
231 | if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) != |
232 | (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) { |
233 | /* Write Drive speed in kbytes/second MSB/LSB */ |
234 | cmd[4] = (speed >> 8) & 0xff; |
235 | cmd[5] = speed & 0xff; |
236 | } |
237 | |
238 | stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0); |
239 | |
240 | if (!ide_cdrom_get_capabilities(drive, buf)) { |
241 | ide_cdrom_update_speed(drive, buf); |
242 | cdi->speed = cd->current_speed; |
243 | } |
244 | |
245 | return 0; |
246 | } |
247 | |
248 | int ide_cdrom_get_last_session(struct cdrom_device_info *cdi, |
249 | struct cdrom_multisession *ms_info) |
250 | { |
251 | struct atapi_toc *toc; |
252 | ide_drive_t *drive = cdi->handle; |
253 | struct cdrom_info *info = drive->driver_data; |
254 | struct request_sense sense; |
255 | int ret; |
256 | |
257 | if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0 || !info->toc) { |
258 | ret = ide_cd_read_toc(drive, &sense); |
259 | if (ret) |
260 | return ret; |
261 | } |
262 | |
263 | toc = info->toc; |
264 | ms_info->addr.lba = toc->last_session_lba; |
265 | ms_info->xa_flag = toc->xa_flag; |
266 | |
267 | return 0; |
268 | } |
269 | |
270 | int ide_cdrom_get_mcn(struct cdrom_device_info *cdi, |
271 | struct cdrom_mcn *mcn_info) |
272 | { |
273 | ide_drive_t *drive = cdi->handle; |
274 | int stat, mcnlen; |
275 | char buf[24]; |
276 | unsigned char cmd[BLK_MAX_CDB]; |
277 | unsigned len = sizeof(buf); |
278 | |
279 | memset(cmd, 0, BLK_MAX_CDB); |
280 | |
281 | cmd[0] = GPCMD_READ_SUBCHANNEL; |
282 | cmd[1] = 2; /* MSF addressing */ |
283 | cmd[2] = 0x40; /* request subQ data */ |
284 | cmd[3] = 2; /* format */ |
285 | cmd[8] = len; |
286 | |
287 | stat = ide_cd_queue_pc(drive, cmd, 0, buf, &len, NULL, 0, 0); |
288 | if (stat) |
289 | return stat; |
290 | |
291 | mcnlen = sizeof(mcn_info->medium_catalog_number) - 1; |
292 | memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen); |
293 | mcn_info->medium_catalog_number[mcnlen] = '\0'; |
294 | |
295 | return 0; |
296 | } |
297 | |
298 | int ide_cdrom_reset(struct cdrom_device_info *cdi) |
299 | { |
300 | ide_drive_t *drive = cdi->handle; |
301 | struct cdrom_info *cd = drive->driver_data; |
302 | struct request_sense sense; |
303 | struct request *rq; |
304 | int ret; |
305 | |
306 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
307 | rq->cmd_type = REQ_TYPE_SPECIAL; |
308 | rq->cmd_flags = REQ_QUIET; |
309 | ret = blk_execute_rq(drive->queue, cd->disk, rq, 0); |
310 | blk_put_request(rq); |
311 | /* |
312 | * A reset will unlock the door. If it was previously locked, |
313 | * lock it again. |
314 | */ |
315 | if (drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED) |
316 | (void)ide_cd_lockdoor(drive, 1, &sense); |
317 | |
318 | return ret; |
319 | } |
320 | |
321 | static int ide_cd_get_toc_entry(ide_drive_t *drive, int track, |
322 | struct atapi_toc_entry **ent) |
323 | { |
324 | struct cdrom_info *info = drive->driver_data; |
325 | struct atapi_toc *toc = info->toc; |
326 | int ntracks; |
327 | |
328 | /* |
329 | * don't serve cached data, if the toc isn't valid |
330 | */ |
331 | if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0) |
332 | return -EINVAL; |
333 | |
334 | /* Check validity of requested track number. */ |
335 | ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; |
336 | |
337 | if (toc->hdr.first_track == CDROM_LEADOUT) |
338 | ntracks = 0; |
339 | |
340 | if (track == CDROM_LEADOUT) |
341 | *ent = &toc->ent[ntracks]; |
342 | else if (track < toc->hdr.first_track || track > toc->hdr.last_track) |
343 | return -EINVAL; |
344 | else |
345 | *ent = &toc->ent[track - toc->hdr.first_track]; |
346 | |
347 | return 0; |
348 | } |
349 | |
350 | static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg) |
351 | { |
352 | struct cdrom_ti *ti = arg; |
353 | struct atapi_toc_entry *first_toc, *last_toc; |
354 | unsigned long lba_start, lba_end; |
355 | int stat; |
356 | struct request_sense sense; |
357 | unsigned char cmd[BLK_MAX_CDB]; |
358 | |
359 | stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc); |
360 | if (stat) |
361 | return stat; |
362 | |
363 | stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc); |
364 | if (stat) |
365 | return stat; |
366 | |
367 | if (ti->cdti_trk1 != CDROM_LEADOUT) |
368 | ++last_toc; |
369 | lba_start = first_toc->addr.lba; |
370 | lba_end = last_toc->addr.lba; |
371 | |
372 | if (lba_end <= lba_start) |
373 | return -EINVAL; |
374 | |
375 | memset(cmd, 0, BLK_MAX_CDB); |
376 | |
377 | cmd[0] = GPCMD_PLAY_AUDIO_MSF; |
378 | lba_to_msf(lba_start, &cmd[3], &cmd[4], &cmd[5]); |
379 | lba_to_msf(lba_end - 1, &cmd[6], &cmd[7], &cmd[8]); |
380 | |
381 | return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0); |
382 | } |
383 | |
384 | static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg) |
385 | { |
386 | struct cdrom_info *cd = drive->driver_data; |
387 | struct cdrom_tochdr *tochdr = arg; |
388 | struct atapi_toc *toc; |
389 | int stat; |
390 | |
391 | /* Make sure our saved TOC is valid. */ |
392 | stat = ide_cd_read_toc(drive, NULL); |
393 | if (stat) |
394 | return stat; |
395 | |
396 | toc = cd->toc; |
397 | tochdr->cdth_trk0 = toc->hdr.first_track; |
398 | tochdr->cdth_trk1 = toc->hdr.last_track; |
399 | |
400 | return 0; |
401 | } |
402 | |
403 | static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg) |
404 | { |
405 | struct cdrom_tocentry *tocentry = arg; |
406 | struct atapi_toc_entry *toce; |
407 | int stat; |
408 | |
409 | stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce); |
410 | if (stat) |
411 | return stat; |
412 | |
413 | tocentry->cdte_ctrl = toce->control; |
414 | tocentry->cdte_adr = toce->adr; |
415 | if (tocentry->cdte_format == CDROM_MSF) { |
416 | lba_to_msf(toce->addr.lba, |
417 | &tocentry->cdte_addr.msf.minute, |
418 | &tocentry->cdte_addr.msf.second, |
419 | &tocentry->cdte_addr.msf.frame); |
420 | } else |
421 | tocentry->cdte_addr.lba = toce->addr.lba; |
422 | |
423 | return 0; |
424 | } |
425 | |
426 | int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi, |
427 | unsigned int cmd, void *arg) |
428 | { |
429 | ide_drive_t *drive = cdi->handle; |
430 | |
431 | switch (cmd) { |
432 | /* |
433 | * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since |
434 | * atapi doesn't support it |
435 | */ |
436 | case CDROMPLAYTRKIND: |
437 | return ide_cd_fake_play_trkind(drive, arg); |
438 | case CDROMREADTOCHDR: |
439 | return ide_cd_read_tochdr(drive, arg); |
440 | case CDROMREADTOCENTRY: |
441 | return ide_cd_read_tocentry(drive, arg); |
442 | default: |
443 | return -EINVAL; |
444 | } |
445 | } |
446 | |
447 | /* the generic packet interface to cdrom.c */ |
448 | int ide_cdrom_packet(struct cdrom_device_info *cdi, |
449 | struct packet_command *cgc) |
450 | { |
451 | ide_drive_t *drive = cdi->handle; |
452 | unsigned int flags = 0; |
453 | unsigned len = cgc->buflen; |
454 | |
455 | if (cgc->timeout <= 0) |
456 | cgc->timeout = ATAPI_WAIT_PC; |
457 | |
458 | /* here we queue the commands from the uniform CD-ROM |
459 | layer. the packet must be complete, as we do not |
460 | touch it at all. */ |
461 | |
462 | if (cgc->data_direction == CGC_DATA_WRITE) |
463 | flags |= REQ_WRITE; |
464 | |
465 | if (cgc->sense) |
466 | memset(cgc->sense, 0, sizeof(struct request_sense)); |
467 | |
468 | if (cgc->quiet) |
469 | flags |= REQ_QUIET; |
470 | |
471 | cgc->stat = ide_cd_queue_pc(drive, cgc->cmd, |
472 | cgc->data_direction == CGC_DATA_WRITE, |
473 | cgc->buffer, &len, |
474 | cgc->sense, cgc->timeout, flags); |
475 | if (!cgc->stat) |
476 | cgc->buflen -= len; |
477 | return cgc->stat; |
478 | } |
479 |
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