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 */
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 */
27 void ide_cdrom_release_real(struct cdrom_device_info *cdi)
28 {
29 ide_drive_t *drive = cdi->handle;
30 struct cdrom_info *cd = drive->driver_data;
31
32 if (!cdi->use_count)
33 cd->cd_flags &= ~IDE_CD_FLAG_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 int ide_cdrom_check_media_change_real(struct cdrom_device_info *cdi,
83 int slot_nr)
84 {
85 ide_drive_t *drive = cdi->handle;
86 struct cdrom_info *cd = drive->driver_data;
87 int retval;
88
89 if (slot_nr == CDSL_CURRENT) {
90 (void) cdrom_check_status(drive, NULL);
91 retval = (cd->cd_flags & IDE_CD_FLAG_MEDIA_CHANGED) ? 1 : 0;
92 cd->cd_flags &= ~IDE_CD_FLAG_MEDIA_CHANGED;
93 return retval;
94 } else {
95 return -EINVAL;
96 }
97 }
98
99 /* Eject the disk if EJECTFLAG is 0.
100 If EJECTFLAG is 1, try to reload the disk. */
101 static
102 int cdrom_eject(ide_drive_t *drive, int ejectflag,
103 struct request_sense *sense)
104 {
105 struct cdrom_info *cd = drive->driver_data;
106 struct cdrom_device_info *cdi = &cd->devinfo;
107 struct request req;
108 char loej = 0x02;
109
110 if ((cd->cd_flags & IDE_CD_FLAG_NO_EJECT) && !ejectflag)
111 return -EDRIVE_CANT_DO_THIS;
112
113 /* reload fails on some drives, if the tray is locked */
114 if ((cd->cd_flags & IDE_CD_FLAG_DOOR_LOCKED) && ejectflag)
115 return 0;
116
117 ide_cd_init_rq(drive, &req);
118
119 /* only tell drive to close tray if open, if it can do that */
120 if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
121 loej = 0;
122
123 req.sense = sense;
124 req.cmd[0] = GPCMD_START_STOP_UNIT;
125 req.cmd[4] = loej | (ejectflag != 0);
126
127 return ide_cd_queue_pc(drive, &req);
128 }
129
130 /* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
131 static
132 int ide_cd_lockdoor(ide_drive_t *drive, int lockflag,
133 struct request_sense *sense)
134 {
135 struct cdrom_info *cd = drive->driver_data;
136 struct request_sense my_sense;
137 struct request req;
138 int stat;
139
140 if (sense == NULL)
141 sense = &my_sense;
142
143 /* If the drive cannot lock the door, just pretend. */
144 if (cd->cd_flags & IDE_CD_FLAG_NO_DOORLOCK) {
145 stat = 0;
146 } else {
147 ide_cd_init_rq(drive, &req);
148 req.sense = sense;
149 req.cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
150 req.cmd[4] = lockflag ? 1 : 0;
151 stat = ide_cd_queue_pc(drive, &req);
152 }
153
154 /* If we got an illegal field error, the drive
155 probably cannot lock the door. */
156 if (stat != 0 &&
157 sense->sense_key == ILLEGAL_REQUEST &&
158 (sense->asc == 0x24 || sense->asc == 0x20)) {
159 printk(KERN_ERR "%s: door locking not supported\n",
160 drive->name);
161 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
162 stat = 0;
163 }
164
165 /* no medium, that's alright. */
166 if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
167 stat = 0;
168
169 if (stat == 0) {
170 if (lockflag)
171 cd->cd_flags |= IDE_CD_FLAG_DOOR_LOCKED;
172 else
173 cd->cd_flags &= ~IDE_CD_FLAG_DOOR_LOCKED;
174 }
175
176 return stat;
177 }
178
179 int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position)
180 {
181 ide_drive_t *drive = cdi->handle;
182 struct request_sense sense;
183
184 if (position) {
185 int stat = ide_cd_lockdoor(drive, 0, &sense);
186
187 if (stat)
188 return stat;
189 }
190
191 return cdrom_eject(drive, !position, &sense);
192 }
193
194 int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
195 {
196 ide_drive_t *drive = cdi->handle;
197
198 return ide_cd_lockdoor(drive, lock, NULL);
199 }
200
201 /*
202 * ATAPI devices are free to select the speed you request or any slower
203 * rate. :-( Requesting too fast a speed will _not_ produce an error.
204 */
205 int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
206 {
207 ide_drive_t *drive = cdi->handle;
208 struct cdrom_info *cd = drive->driver_data;
209 struct request rq;
210 struct request_sense sense;
211 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
212 int stat;
213
214 ide_cd_init_rq(drive, &rq);
215
216 rq.sense = &sense;
217
218 if (speed == 0)
219 speed = 0xffff; /* set to max */
220 else
221 speed *= 177; /* Nx to kbytes/s */
222
223 rq.cmd[0] = GPCMD_SET_SPEED;
224 /* Read Drive speed in kbytes/second MSB/LSB */
225 rq.cmd[2] = (speed >> 8) & 0xff;
226 rq.cmd[3] = speed & 0xff;
227 if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
228 (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
229 /* Write Drive speed in kbytes/second MSB/LSB */
230 rq.cmd[4] = (speed >> 8) & 0xff;
231 rq.cmd[5] = speed & 0xff;
232 }
233
234 stat = ide_cd_queue_pc(drive, &rq);
235
236 if (!ide_cdrom_get_capabilities(drive, buf)) {
237 ide_cdrom_update_speed(drive, buf);
238 cdi->speed = cd->current_speed;
239 }
240
241 return 0;
242 }
243
244 int ide_cdrom_get_last_session(struct cdrom_device_info *cdi,
245 struct cdrom_multisession *ms_info)
246 {
247 struct atapi_toc *toc;
248 ide_drive_t *drive = cdi->handle;
249 struct cdrom_info *info = drive->driver_data;
250 struct request_sense sense;
251 int ret;
252
253 if ((info->cd_flags & IDE_CD_FLAG_TOC_VALID) == 0 || !info->toc) {
254 ret = ide_cd_read_toc(drive, &sense);
255 if (ret)
256 return ret;
257 }
258
259 toc = info->toc;
260 ms_info->addr.lba = toc->last_session_lba;
261 ms_info->xa_flag = toc->xa_flag;
262
263 return 0;
264 }
265
266 int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
267 struct cdrom_mcn *mcn_info)
268 {
269 ide_drive_t *drive = cdi->handle;
270 int stat, mcnlen;
271 struct request rq;
272 char buf[24];
273
274 ide_cd_init_rq(drive, &rq);
275
276 rq.data = buf;
277 rq.data_len = sizeof(buf);
278
279 rq.cmd[0] = GPCMD_READ_SUBCHANNEL;
280 rq.cmd[1] = 2; /* MSF addressing */
281 rq.cmd[2] = 0x40; /* request subQ data */
282 rq.cmd[3] = 2; /* format */
283 rq.cmd[8] = sizeof(buf);
284
285 stat = ide_cd_queue_pc(drive, &rq);
286 if (stat)
287 return stat;
288
289 mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
290 memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
291 mcn_info->medium_catalog_number[mcnlen] = '\0';
292
293 return 0;
294 }
295
296 int ide_cdrom_reset(struct cdrom_device_info *cdi)
297 {
298 ide_drive_t *drive = cdi->handle;
299 struct cdrom_info *cd = drive->driver_data;
300 struct request_sense sense;
301 struct request req;
302 int ret;
303
304 ide_cd_init_rq(drive, &req);
305 req.cmd_type = REQ_TYPE_SPECIAL;
306 req.cmd_flags = REQ_QUIET;
307 ret = ide_do_drive_cmd(drive, &req, ide_wait);
308
309 /*
310 * A reset will unlock the door. If it was previously locked,
311 * lock it again.
312 */
313 if (cd->cd_flags & IDE_CD_FLAG_DOOR_LOCKED)
314 (void)ide_cd_lockdoor(drive, 1, &sense);
315
316 return ret;
317 }
318
319 static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
320 struct atapi_toc_entry **ent)
321 {
322 struct cdrom_info *info = drive->driver_data;
323 struct atapi_toc *toc = info->toc;
324 int ntracks;
325
326 /*
327 * don't serve cached data, if the toc isn't valid
328 */
329 if ((info->cd_flags & IDE_CD_FLAG_TOC_VALID) == 0)
330 return -EINVAL;
331
332 /* Check validity of requested track number. */
333 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
334
335 if (toc->hdr.first_track == CDROM_LEADOUT)
336 ntracks = 0;
337
338 if (track == CDROM_LEADOUT)
339 *ent = &toc->ent[ntracks];
340 else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
341 return -EINVAL;
342 else
343 *ent = &toc->ent[track - toc->hdr.first_track];
344
345 return 0;
346 }
347
348 static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
349 {
350 struct cdrom_ti *ti = arg;
351 struct atapi_toc_entry *first_toc, *last_toc;
352 unsigned long lba_start, lba_end;
353 int stat;
354 struct request rq;
355 struct request_sense sense;
356
357 stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
358 if (stat)
359 return stat;
360
361 stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
362 if (stat)
363 return stat;
364
365 if (ti->cdti_trk1 != CDROM_LEADOUT)
366 ++last_toc;
367 lba_start = first_toc->addr.lba;
368 lba_end = last_toc->addr.lba;
369
370 if (lba_end <= lba_start)
371 return -EINVAL;
372
373 ide_cd_init_rq(drive, &rq);
374
375 rq.sense = &sense;
376 rq.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
377 lba_to_msf(lba_start, &rq.cmd[3], &rq.cmd[4], &rq.cmd[5]);
378 lba_to_msf(lba_end - 1, &rq.cmd[6], &rq.cmd[7], &rq.cmd[8]);
379
380 return ide_cd_queue_pc(drive, &rq);
381 }
382
383 static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
384 {
385 struct cdrom_info *cd = drive->driver_data;
386 struct cdrom_tochdr *tochdr = arg;
387 struct atapi_toc *toc;
388 int stat;
389
390 /* Make sure our saved TOC is valid. */
391 stat = ide_cd_read_toc(drive, NULL);
392 if (stat)
393 return stat;
394
395 toc = cd->toc;
396 tochdr->cdth_trk0 = toc->hdr.first_track;
397 tochdr->cdth_trk1 = toc->hdr.last_track;
398
399 return 0;
400 }
401
402 static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
403 {
404 struct cdrom_tocentry *tocentry = arg;
405 struct atapi_toc_entry *toce;
406 int stat;
407
408 stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
409 if (stat)
410 return stat;
411
412 tocentry->cdte_ctrl = toce->control;
413 tocentry->cdte_adr = toce->adr;
414 if (tocentry->cdte_format == CDROM_MSF) {
415 lba_to_msf(toce->addr.lba,
416 &tocentry->cdte_addr.msf.minute,
417 &tocentry->cdte_addr.msf.second,
418 &tocentry->cdte_addr.msf.frame);
419 } else
420 tocentry->cdte_addr.lba = toce->addr.lba;
421
422 return 0;
423 }
424
425 int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
426 unsigned int cmd, void *arg)
427 {
428 ide_drive_t *drive = cdi->handle;
429
430 switch (cmd) {
431 /*
432 * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
433 * atapi doesn't support it
434 */
435 case CDROMPLAYTRKIND:
436 return ide_cd_fake_play_trkind(drive, arg);
437 case CDROMREADTOCHDR:
438 return ide_cd_read_tochdr(drive, arg);
439 case CDROMREADTOCENTRY:
440 return ide_cd_read_tocentry(drive, arg);
441 default:
442 return -EINVAL;
443 }
444 }
445
446 /* the generic packet interface to cdrom.c */
447 int ide_cdrom_packet(struct cdrom_device_info *cdi,
448 struct packet_command *cgc)
449 {
450 struct request req;
451 ide_drive_t *drive = cdi->handle;
452
453 if (cgc->timeout <= 0)
454 cgc->timeout = ATAPI_WAIT_PC;
455
456 /* here we queue the commands from the uniform CD-ROM
457 layer. the packet must be complete, as we do not
458 touch it at all. */
459 ide_cd_init_rq(drive, &req);
460
461 if (cgc->data_direction == CGC_DATA_WRITE)
462 req.cmd_flags |= REQ_RW;
463
464 memcpy(req.cmd, cgc->cmd, CDROM_PACKET_SIZE);
465 if (cgc->sense)
466 memset(cgc->sense, 0, sizeof(struct request_sense));
467 req.data = cgc->buffer;
468 req.data_len = cgc->buflen;
469 req.timeout = cgc->timeout;
470
471 if (cgc->quiet)
472 req.cmd_flags |= REQ_QUIET;
473
474 req.sense = cgc->sense;
475 cgc->stat = ide_cd_queue_pc(drive, &req);
476 if (!cgc->stat)
477 cgc->buflen -= req.data_len;
478 return cgc->stat;
479 }
480
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