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