aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/ide/ide-cd_ioctl.c
blob: f1ab726bd430cde4ded143314ea5b075414c4157 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
/*
 * cdrom.c IOCTLs handling for ide-cd driver.
 *
 * Copyright (C) 1994-1996  Scott Snyder <snyder@fnald0.fnal.gov>
 * Copyright (C) 1996-1998  Erik Andersen <andersee@debian.org>
 * Copyright (C) 1998-2000  Jens Axboe <axboe@suse.de>
 */

#include <linux/kernel.h>
#include <linux/cdrom.h>
#include <linux/gfp.h>
#include <linux/ide.h>
#include <scsi/scsi.h>

#include "ide-cd.h"

/****************************************************************************
 * Other driver requests (open, close, check media change).
 */
int ide_cdrom_open_real(struct cdrom_device_info *cdi, int purpose)
{
	return 0;
}

/*
 * Close down the device.  Invalidate all cached blocks.
 */
void ide_cdrom_release_real(struct cdrom_device_info *cdi)
{
	ide_drive_t *drive = cdi->handle;

	if (!cdi->use_count)
		drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
}

/*
 * add logic to try GET_EVENT command first to check for media and tray
 * status. this should be supported by newer cd-r/w and all DVD etc
 * drives
 */
int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
{
	ide_drive_t *drive = cdi->handle;
	struct media_event_desc med;
	struct request_sense sense;
	int stat;

	if (slot_nr != CDSL_CURRENT)
		return -EINVAL;

	stat = cdrom_check_status(drive, &sense);
	if (!stat || sense.sense_key == UNIT_ATTENTION)
		return CDS_DISC_OK;

	if (!cdrom_get_media_event(cdi, &med)) {
		if (med.media_present)
			return CDS_DISC_OK;
		else if (med.door_open)
			return CDS_TRAY_OPEN;
		else
			return CDS_NO_DISC;
	}

	if (sense.sense_key == NOT_READY && sense.asc == 0x04
			&& sense.ascq == 0x04)
		return CDS_DISC_OK;

	/*
	 * If not using Mt Fuji extended media tray reports,
	 * just return TRAY_OPEN since ATAPI doesn't provide
	 * any other way to detect this...
	 */
	if (sense.sense_key == NOT_READY) {
		if (sense.asc == 0x3a && sense.ascq == 1)
			return CDS_NO_DISC;
		else
			return CDS_TRAY_OPEN;
	}
	return CDS_DRIVE_NOT_READY;
}

/*
 * ide-cd always generates media changed event if media is missing, which
 * makes it impossible to use for proper event reporting, so disk->events
 * is cleared to 0 and the following function is used only to trigger
 * revalidation and never propagated to userland.
 */
unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *cdi,
					 unsigned int clearing, int slot_nr)
{
	ide_drive_t *drive = cdi->handle;
	int retval;

	if (slot_nr == CDSL_CURRENT) {
		(void) cdrom_check_status(drive, NULL);
		retval = (drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED) ? 1 : 0;
		drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
		return retval ? DISK_EVENT_MEDIA_CHANGE : 0;
	} else {
		return 0;
	}
}

/* Eject the disk if EJECTFLAG is 0.
   If EJECTFLAG is 1, try to reload the disk. */
static
int cdrom_eject(ide_drive_t *drive, int ejectflag,
		struct request_sense *sense)
{
	struct cdrom_info *cd = drive->driver_data;
	struct cdrom_device_info *cdi = &cd->devinfo;
	char loej = 0x02;
	unsigned char cmd[BLK_MAX_CDB];

	if ((drive->atapi_flags & IDE_AFLAG_NO_EJECT) && !ejectflag)
		return -EDRIVE_CANT_DO_THIS;

	/* reload fails on some drives, if the tray is locked */
	if ((drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED) && ejectflag)
		return 0;

	/* only tell drive to close tray if open, if it can do that */
	if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
		loej = 0;

	memset(cmd, 0, BLK_MAX_CDB);

	cmd[0] = GPCMD_START_STOP_UNIT;
	cmd[4] = loej | (ejectflag != 0);

	return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, 0);
}

/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
static
int ide_cd_lockdoor(ide_drive_t *drive, int lockflag,
		    struct request_sense *sense)
{
	struct request_sense my_sense;
	int stat;

	if (sense == NULL)
		sense = &my_sense;

	/* If the drive cannot lock the door, just pretend. */
	if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) {
		stat = 0;
	} else {
		unsigned char cmd[BLK_MAX_CDB];

		memset(cmd, 0, BLK_MAX_CDB);

		cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
		cmd[4] = lockflag ? 1 : 0;

		stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL,
				       sense, 0, 0);
	}

	/* If we got an illegal field error, the drive
	   probably cannot lock the door. */
	if (stat != 0 &&
	    sense->sense_key == ILLEGAL_REQUEST &&
	    (sense->asc == 0x24 || sense->asc == 0x20)) {
		printk(KERN_ERR "%s: door locking not supported\n",
			drive->name);
		drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
		stat = 0;
	}

	/* no medium, that's alright. */
	if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
		stat = 0;

	if (stat == 0) {
		if (lockflag)
			drive->atapi_flags |= IDE_AFLAG_DOOR_LOCKED;
		else
			drive->atapi_flags &= ~IDE_AFLAG_DOOR_LOCKED;
	}

	return stat;
}

int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position)
{
	ide_drive_t *drive = cdi->handle;
	struct request_sense sense;

	if (position) {
		int stat = ide_cd_lockdoor(drive, 0, &sense);

		if (stat)
			return stat;
	}

	return cdrom_eject(drive, !position, &sense);
}

int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
{
	ide_drive_t *drive = cdi->handle;

	return ide_cd_lockdoor(drive, lock, NULL);
}

/*
 * ATAPI devices are free to select the speed you request or any slower
 * rate. :-(  Requesting too fast a speed will _not_ produce an error.
 */
int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
{
	ide_drive_t *drive = cdi->handle;
	struct cdrom_info *cd = drive->driver_data;
	struct request_sense sense;
	u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
	int stat;
	unsigned char cmd[BLK_MAX_CDB];

	if (speed == 0)
		speed = 0xffff; /* set to max */
	else
		speed *= 177;   /* Nx to kbytes/s */

	memset(cmd, 0, BLK_MAX_CDB);

	cmd[0] = GPCMD_SET_SPEED;
	/* Read Drive speed in kbytes/second MSB/LSB */
	cmd[2] = (speed >> 8) & 0xff;
	cmd[3] = speed & 0xff;
	if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
	    (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
		/* Write Drive speed in kbytes/second MSB/LSB */
		cmd[4] = (speed >> 8) & 0xff;
		cmd[5] = speed & 0xff;
	}

	stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);

	if (!ide_cdrom_get_capabilities(drive, buf)) {
		ide_cdrom_update_speed(drive, buf);
		cdi->speed = cd->current_speed;
	}

	return 0;
}

int ide_cdrom_get_last_session(struct cdrom_device_info *cdi,
			       struct cdrom_multisession *ms_info)
{
	struct atapi_toc *toc;
	ide_drive_t *drive = cdi->handle;
	struct cdrom_info *info = drive->driver_data;
	struct request_sense sense;
	int ret;

	if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0 || !info->toc) {
		ret = ide_cd_read_toc(drive, &sense);
		if (ret)
			return ret;
	}

	toc = info->toc;
	ms_info->addr.lba = toc->last_session_lba;
	ms_info->xa_flag = toc->xa_flag;

	return 0;
}

int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
		      struct cdrom_mcn *mcn_info)
{
	ide_drive_t *drive = cdi->handle;
	int stat, mcnlen;
	char buf[24];
	unsigned char cmd[BLK_MAX_CDB];
	unsigned len = sizeof(buf);

	memset(cmd, 0, BLK_MAX_CDB);

	cmd[0] = GPCMD_READ_SUBCHANNEL;
	cmd[1] = 2;		/* MSF addressing */
	cmd[2] = 0x40;	/* request subQ data */
	cmd[3] = 2;		/* format */
	cmd[8] = len;

	stat = ide_cd_queue_pc(drive, cmd, 0, buf, &len, NULL, 0, 0);
	if (stat)
		return stat;

	mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
	memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
	mcn_info->medium_catalog_number[mcnlen] = '\0';

	return 0;
}

int ide_cdrom_reset(struct cdrom_device_info *cdi)
{
	ide_drive_t *drive = cdi->handle;
	struct cdrom_info *cd = drive->driver_data;
	struct request_sense sense;
	struct request *rq;
	int ret;

	rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
	scsi_req_init(rq);
	ide_req(rq)->type = ATA_PRIV_MISC;
	rq->rq_flags = RQF_QUIET;
	blk_execute_rq(drive->queue, cd->disk, rq, 0);
	ret = rq->errors ? -EIO : 0;
	blk_put_request(rq);
	/*
	 * A reset will unlock the door. If it was previously locked,
	 * lock it again.
	 */
	if (drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED)
		(void)ide_cd_lockdoor(drive, 1, &sense);

	return ret;
}

static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
				struct atapi_toc_entry **ent)
{
	struct cdrom_info *info = drive->driver_data;
	struct atapi_toc *toc = info->toc;
	int ntracks;

	/*
	 * don't serve cached data, if the toc isn't valid
	 */
	if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0)
		return -EINVAL;

	/* Check validity of requested track number. */
	ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;

	if (toc->hdr.first_track == CDROM_LEADOUT)
		ntracks = 0;

	if (track == CDROM_LEADOUT)
		*ent = &toc->ent[ntracks];
	else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
		return -EINVAL;
	else
		*ent = &toc->ent[track - toc->hdr.first_track];

	return 0;
}

static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
{
	struct cdrom_ti *ti = arg;
	struct atapi_toc_entry *first_toc, *last_toc;
	unsigned long lba_start, lba_end;
	int stat;
	struct request_sense sense;
	unsigned char cmd[BLK_MAX_CDB];

	stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
	if (stat)
		return stat;

	stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
	if (stat)
		return stat;

	if (ti->cdti_trk1 != CDROM_LEADOUT)
		++last_toc;
	lba_start = first_toc->addr.lba;
	lba_end   = last_toc->addr.lba;

	if (lba_end <= lba_start)
		return -EINVAL;

	memset(cmd, 0, BLK_MAX_CDB);

	cmd[0] = GPCMD_PLAY_AUDIO_MSF;
	lba_to_msf(lba_start,   &cmd[3], &cmd[4], &cmd[5]);
	lba_to_msf(lba_end - 1, &cmd[6], &cmd[7], &cmd[8]);

	return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);
}

static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
{
	struct cdrom_info *cd = drive->driver_data;
	struct cdrom_tochdr *tochdr = arg;
	struct atapi_toc *toc;
	int stat;

	/* Make sure our saved TOC is valid. */
	stat = ide_cd_read_toc(drive, NULL);
	if (stat)
		return stat;

	toc = cd->toc;
	tochdr->cdth_trk0 = toc->hdr.first_track;
	tochdr->cdth_trk1 = toc->hdr.last_track;

	return 0;
}

static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
{
	struct cdrom_tocentry *tocentry = arg;
	struct atapi_toc_entry *toce;
	int stat;

	stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
	if (stat)
		return stat;

	tocentry->cdte_ctrl = toce->control;
	tocentry->cdte_adr  = toce->adr;
	if (tocentry->cdte_format == CDROM_MSF) {
		lba_to_msf(toce->addr.lba,
			   &tocentry->cdte_addr.msf.minute,
			   &tocentry->cdte_addr.msf.second,
			   &tocentry->cdte_addr.msf.frame);
	} else
		tocentry->cdte_addr.lba = toce->addr.lba;

	return 0;
}

int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
			  unsigned int cmd, void *arg)
{
	ide_drive_t *drive = cdi->handle;

	switch (cmd) {
	/*
	 * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
	 * atapi doesn't support it
	 */
	case CDROMPLAYTRKIND:
		return ide_cd_fake_play_trkind(drive, arg);
	case CDROMREADTOCHDR:
		return ide_cd_read_tochdr(drive, arg);
	case CDROMREADTOCENTRY:
		return ide_cd_read_tocentry(drive, arg);
	default:
		return -EINVAL;
	}
}

/* the generic packet interface to cdrom.c */
int ide_cdrom_packet(struct cdrom_device_info *cdi,
			    struct packet_command *cgc)
{
	ide_drive_t *drive = cdi->handle;
	req_flags_t flags = 0;
	unsigned len = cgc->buflen;

	if (cgc->timeout <= 0)
		cgc->timeout = ATAPI_WAIT_PC;

	/* here we queue the commands from the uniform CD-ROM
	   layer. the packet must be complete, as we do not
	   touch it at all. */

	if (cgc->sense)
		memset(cgc->sense, 0, sizeof(struct request_sense));

	if (cgc->quiet)
		flags |= RQF_QUIET;

	cgc->stat = ide_cd_queue_pc(drive, cgc->cmd,
				    cgc->data_direction == CGC_DATA_WRITE,
				    cgc->buffer, &len,
				    cgc->sense, cgc->timeout, flags);
	if (!cgc->stat)
		cgc->buflen -= len;
	return cgc->stat;
}

Privacy Policy