ide-cd_ioctl.c revision b348487f0dc06f09a4c0d9e353eaa66e70230c7d 
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 */
19int 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 */
27void 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 */
41int 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
82int 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. */
101static
102int 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. */
131static
132int 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
179int 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
194int 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 */
205int 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
244int 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
266int 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
296int 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
319static 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
348static 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
383static 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
402static 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
425int 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 */
447int 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