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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * cdrom.c IOCTLs handling for ide-cd driver.
4 *
5 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
6 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
7 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
8 */
9
10#include <linux/kernel.h>
11#include <linux/cdrom.h>
12#include <linux/gfp.h>
13#include <linux/ide.h>
14#include <scsi/scsi.h>
15
16#include "ide-cd.h"
17
18/****************************************************************************
19 * Other driver requests (open, close, check media change).
20 */
21int ide_cdrom_open_real(struct cdrom_device_info *cdi, int purpose)
22{
23 return 0;
24}
25
26/*
27 * Close down the device. Invalidate all cached blocks.
28 */
29void ide_cdrom_release_real(struct cdrom_device_info *cdi)
30{
31 ide_drive_t *drive = cdi->handle;
32
33 if (!cdi->use_count)
34 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
35}
36
37/*
38 * add logic to try GET_EVENT command first to check for media and tray
39 * status. this should be supported by newer cd-r/w and all DVD etc
40 * drives
41 */
42int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
43{
44 ide_drive_t *drive = cdi->handle;
45 struct media_event_desc med;
46 struct request_sense sense;
47 int stat;
48
49 if (slot_nr != CDSL_CURRENT)
50 return -EINVAL;
51
52 stat = cdrom_check_status(drive, &sense);
53 if (!stat || sense.sense_key == UNIT_ATTENTION)
54 return CDS_DISC_OK;
55
56 if (!cdrom_get_media_event(cdi, &med)) {
57 if (med.media_present)
58 return CDS_DISC_OK;
59 else if (med.door_open)
60 return CDS_TRAY_OPEN;
61 else
62 return CDS_NO_DISC;
63 }
64
65 if (sense.sense_key == NOT_READY && sense.asc == 0x04
66 && sense.ascq == 0x04)
67 return CDS_DISC_OK;
68
69 /*
70 * If not using Mt Fuji extended media tray reports,
71 * just return TRAY_OPEN since ATAPI doesn't provide
72 * any other way to detect this...
73 */
74 if (sense.sense_key == NOT_READY) {
75 if (sense.asc == 0x3a && sense.ascq == 1)
76 return CDS_NO_DISC;
77 else
78 return CDS_TRAY_OPEN;
79 }
80 return CDS_DRIVE_NOT_READY;
81}
82
83/*
84 * ide-cd always generates media changed event if media is missing, which
85 * makes it impossible to use for proper event reporting, so disk->events
86 * is cleared to 0 and the following function is used only to trigger
87 * revalidation and never propagated to userland.
88 */
89unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *cdi,
90 unsigned int clearing, int slot_nr)
91{
92 ide_drive_t *drive = cdi->handle;
93 int retval;
94
95 if (slot_nr == CDSL_CURRENT) {
96 (void) cdrom_check_status(drive, NULL);
97 retval = (drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED) ? 1 : 0;
98 drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
99 return retval ? DISK_EVENT_MEDIA_CHANGE : 0;
100 } else {
101 return 0;
102 }
103}
104
105/* Eject the disk if EJECTFLAG is 0.
106 If EJECTFLAG is 1, try to reload the disk. */
107static
108int cdrom_eject(ide_drive_t *drive, int ejectflag,
109 struct request_sense *sense)
110{
111 struct cdrom_info *cd = drive->driver_data;
112 struct cdrom_device_info *cdi = &cd->devinfo;
113 char loej = 0x02;
114 unsigned char cmd[BLK_MAX_CDB];
115
116 if ((drive->atapi_flags & IDE_AFLAG_NO_EJECT) && !ejectflag)
117 return -EDRIVE_CANT_DO_THIS;
118
119 /* reload fails on some drives, if the tray is locked */
120 if ((drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED) && ejectflag)
121 return 0;
122
123 /* only tell drive to close tray if open, if it can do that */
124 if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
125 loej = 0;
126
127 memset(cmd, 0, BLK_MAX_CDB);
128
129 cmd[0] = GPCMD_START_STOP_UNIT;
130 cmd[4] = loej | (ejectflag != 0);
131
132 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, 0);
133}
134
135/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
136static
137int ide_cd_lockdoor(ide_drive_t *drive, int lockflag,
138 struct request_sense *sense)
139{
140 struct request_sense my_sense;
141 int stat;
142
143 if (sense == NULL)
144 sense = &my_sense;
145
146 /* If the drive cannot lock the door, just pretend. */
147 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) {
148 stat = 0;
149 } else {
150 unsigned char cmd[BLK_MAX_CDB];
151
152 memset(cmd, 0, BLK_MAX_CDB);
153
154 cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
155 cmd[4] = lockflag ? 1 : 0;
156
157 stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL,
158 sense, 0, 0);
159 }
160
161 /* If we got an illegal field error, the drive
162 probably cannot lock the door. */
163 if (stat != 0 &&
164 sense->sense_key == ILLEGAL_REQUEST &&
165 (sense->asc == 0x24 || sense->asc == 0x20)) {
166 printk(KERN_ERR "%s: door locking not supported\n",
167 drive->name);
168 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
169 stat = 0;
170 }
171
172 /* no medium, that's alright. */
173 if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
174 stat = 0;
175
176 if (stat == 0) {
177 if (lockflag)
178 drive->atapi_flags |= IDE_AFLAG_DOOR_LOCKED;
179 else
180 drive->atapi_flags &= ~IDE_AFLAG_DOOR_LOCKED;
181 }
182
183 return stat;
184}
185
186int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position)
187{
188 ide_drive_t *drive = cdi->handle;
189 struct request_sense sense;
190
191 if (position) {
192 int stat = ide_cd_lockdoor(drive, 0, &sense);
193
194 if (stat)
195 return stat;
196 }
197
198 return cdrom_eject(drive, !position, &sense);
199}
200
201int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
202{
203 ide_drive_t *drive = cdi->handle;
204
205 return ide_cd_lockdoor(drive, lock, NULL);
206}
207
208/*
209 * ATAPI devices are free to select the speed you request or any slower
210 * rate. :-( Requesting too fast a speed will _not_ produce an error.
211 */
212int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
213{
214 ide_drive_t *drive = cdi->handle;
215 struct cdrom_info *cd = drive->driver_data;
216 struct request_sense sense;
217 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
218 int stat;
219 unsigned char cmd[BLK_MAX_CDB];
220
221 if (speed == 0)
222 speed = 0xffff; /* set to max */
223 else
224 speed *= 177; /* Nx to kbytes/s */
225
226 memset(cmd, 0, BLK_MAX_CDB);
227
228 cmd[0] = GPCMD_SET_SPEED;
229 /* Read Drive speed in kbytes/second MSB/LSB */
230 cmd[2] = (speed >> 8) & 0xff;
231 cmd[3] = speed & 0xff;
232 if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
233 (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
234 /* Write Drive speed in kbytes/second MSB/LSB */
235 cmd[4] = (speed >> 8) & 0xff;
236 cmd[5] = speed & 0xff;
237 }
238
239 stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);
240
241 if (!ide_cdrom_get_capabilities(drive, buf)) {
242 ide_cdrom_update_speed(drive, buf);
243 cdi->speed = cd->current_speed;
244 }
245
246 return 0;
247}
248
249int ide_cdrom_get_last_session(struct cdrom_device_info *cdi,
250 struct cdrom_multisession *ms_info)
251{
252 struct atapi_toc *toc;
253 ide_drive_t *drive = cdi->handle;
254 struct cdrom_info *info = drive->driver_data;
255 struct request_sense sense;
256 int ret;
257
258 if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0 || !info->toc) {
259 ret = ide_cd_read_toc(drive, &sense);
260 if (ret)
261 return ret;
262 }
263
264 toc = info->toc;
265 ms_info->addr.lba = toc->last_session_lba;
266 ms_info->xa_flag = toc->xa_flag;
267
268 return 0;
269}
270
271int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
272 struct cdrom_mcn *mcn_info)
273{
274 ide_drive_t *drive = cdi->handle;
275 int stat, mcnlen;
276 char buf[24];
277 unsigned char cmd[BLK_MAX_CDB];
278 unsigned len = sizeof(buf);
279
280 memset(cmd, 0, BLK_MAX_CDB);
281
282 cmd[0] = GPCMD_READ_SUBCHANNEL;
283 cmd[1] = 2; /* MSF addressing */
284 cmd[2] = 0x40; /* request subQ data */
285 cmd[3] = 2; /* format */
286 cmd[8] = len;
287
288 stat = ide_cd_queue_pc(drive, cmd, 0, buf, &len, NULL, 0, 0);
289 if (stat)
290 return stat;
291
292 mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
293 memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
294 mcn_info->medium_catalog_number[mcnlen] = '\0';
295
296 return 0;
297}
298
299int ide_cdrom_reset(struct cdrom_device_info *cdi)
300{
301 ide_drive_t *drive = cdi->handle;
302 struct cdrom_info *cd = drive->driver_data;
303 struct request_sense sense;
304 struct request *rq;
305 int ret;
306
307 rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
308 ide_req(rq)->type = ATA_PRIV_MISC;
309 rq->rq_flags = RQF_QUIET;
310 blk_execute_rq(drive->queue, cd->disk, rq, 0);
311 ret = scsi_req(rq)->result ? -EIO : 0;
312 blk_put_request(rq);
313 /*
314 * A reset will unlock the door. If it was previously locked,
315 * lock it again.
316 */
317 if (drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED)
318 (void)ide_cd_lockdoor(drive, 1, &sense);
319
320 return ret;
321}
322
323static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
324 struct atapi_toc_entry **ent)
325{
326 struct cdrom_info *info = drive->driver_data;
327 struct atapi_toc *toc = info->toc;
328 int ntracks;
329
330 /*
331 * don't serve cached data, if the toc isn't valid
332 */
333 if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0)
334 return -EINVAL;
335
336 /* Check validity of requested track number. */
337 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
338
339 if (toc->hdr.first_track == CDROM_LEADOUT)
340 ntracks = 0;
341
342 if (track == CDROM_LEADOUT)
343 *ent = &toc->ent[ntracks];
344 else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
345 return -EINVAL;
346 else
347 *ent = &toc->ent[track - toc->hdr.first_track];
348
349 return 0;
350}
351
352static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
353{
354 struct cdrom_ti *ti = arg;
355 struct atapi_toc_entry *first_toc, *last_toc;
356 unsigned long lba_start, lba_end;
357 int stat;
358 struct request_sense sense;
359 unsigned char cmd[BLK_MAX_CDB];
360
361 stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
362 if (stat)
363 return stat;
364
365 stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
366 if (stat)
367 return stat;
368
369 if (ti->cdti_trk1 != CDROM_LEADOUT)
370 ++last_toc;
371 lba_start = first_toc->addr.lba;
372 lba_end = last_toc->addr.lba;
373
374 if (lba_end <= lba_start)
375 return -EINVAL;
376
377 memset(cmd, 0, BLK_MAX_CDB);
378
379 cmd[0] = GPCMD_PLAY_AUDIO_MSF;
380 lba_to_msf(lba_start, &cmd[3], &cmd[4], &cmd[5]);
381 lba_to_msf(lba_end - 1, &cmd[6], &cmd[7], &cmd[8]);
382
383 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);
384}
385
386static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
387{
388 struct cdrom_info *cd = drive->driver_data;
389 struct cdrom_tochdr *tochdr = arg;
390 struct atapi_toc *toc;
391 int stat;
392
393 /* Make sure our saved TOC is valid. */
394 stat = ide_cd_read_toc(drive, NULL);
395 if (stat)
396 return stat;
397
398 toc = cd->toc;
399 tochdr->cdth_trk0 = toc->hdr.first_track;
400 tochdr->cdth_trk1 = toc->hdr.last_track;
401
402 return 0;
403}
404
405static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
406{
407 struct cdrom_tocentry *tocentry = arg;
408 struct atapi_toc_entry *toce;
409 int stat;
410
411 stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
412 if (stat)
413 return stat;
414
415 tocentry->cdte_ctrl = toce->control;
416 tocentry->cdte_adr = toce->adr;
417 if (tocentry->cdte_format == CDROM_MSF) {
418 lba_to_msf(toce->addr.lba,
419 &tocentry->cdte_addr.msf.minute,
420 &tocentry->cdte_addr.msf.second,
421 &tocentry->cdte_addr.msf.frame);
422 } else
423 tocentry->cdte_addr.lba = toce->addr.lba;
424
425 return 0;
426}
427
428int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
429 unsigned int cmd, void *arg)
430{
431 ide_drive_t *drive = cdi->handle;
432
433 switch (cmd) {
434 /*
435 * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
436 * atapi doesn't support it
437 */
438 case CDROMPLAYTRKIND:
439 return ide_cd_fake_play_trkind(drive, arg);
440 case CDROMREADTOCHDR:
441 return ide_cd_read_tochdr(drive, arg);
442 case CDROMREADTOCENTRY:
443 return ide_cd_read_tocentry(drive, arg);
444 default:
445 return -EINVAL;
446 }
447}
448
449/* the generic packet interface to cdrom.c */
450int ide_cdrom_packet(struct cdrom_device_info *cdi,
451 struct packet_command *cgc)
452{
453 ide_drive_t *drive = cdi->handle;
454 req_flags_t flags = 0;
455 unsigned len = cgc->buflen;
456
457 if (cgc->timeout <= 0)
458 cgc->timeout = ATAPI_WAIT_PC;
459
460 /* here we queue the commands from the uniform CD-ROM
461 layer. the packet must be complete, as we do not
462 touch it at all. */
463
464 if (cgc->sense)
465 memset(cgc->sense, 0, sizeof(struct request_sense));
466
467 if (cgc->quiet)
468 flags |= RQF_QUIET;
469
470 cgc->stat = ide_cd_queue_pc(drive, cgc->cmd,
471 cgc->data_direction == CGC_DATA_WRITE,
472 cgc->buffer, &len,
473 cgc->sense, cgc->timeout, flags);
474 if (!cgc->stat)
475 cgc->buflen -= len;
476 return cgc->stat;
477}