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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 scsi_sense_hdr sshdr;
47 int stat;
48
49 if (slot_nr != CDSL_CURRENT)
50 return -EINVAL;
51
52 stat = cdrom_check_status(drive, &sshdr);
53 if (!stat || sshdr.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 (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04
66 && sshdr.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 (sshdr.sense_key == NOT_READY) {
75 if (sshdr.asc == 0x3a && sshdr.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
86 * DISK_EVENT_FLAG_UEVENT is cleared in disk->event_flags
87 * and the following function is used only to trigger
88 * revalidation and never propagated to userland.
89 */
90unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *cdi,
91 unsigned int clearing, int slot_nr)
92{
93 ide_drive_t *drive = cdi->handle;
94 int retval;
95
96 if (slot_nr == CDSL_CURRENT) {
97 (void) cdrom_check_status(drive, NULL);
98 retval = (drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED) ? 1 : 0;
99 drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
100 return retval ? DISK_EVENT_MEDIA_CHANGE : 0;
101 } else {
102 return 0;
103 }
104}
105
106/* Eject the disk if EJECTFLAG is 0.
107 If EJECTFLAG is 1, try to reload the disk. */
108static
109int cdrom_eject(ide_drive_t *drive, int ejectflag)
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, NULL, 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{
139 struct scsi_sense_hdr sshdr;
140 int stat;
141
142 /* If the drive cannot lock the door, just pretend. */
143 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) {
144 stat = 0;
145 } else {
146 unsigned char cmd[BLK_MAX_CDB];
147
148 memset(cmd, 0, BLK_MAX_CDB);
149
150 cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
151 cmd[4] = lockflag ? 1 : 0;
152
153 stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL,
154 &sshdr, 0, 0);
155 }
156
157 /* If we got an illegal field error, the drive
158 probably cannot lock the door. */
159 if (stat != 0 &&
160 sshdr.sense_key == ILLEGAL_REQUEST &&
161 (sshdr.asc == 0x24 || sshdr.asc == 0x20)) {
162 printk(KERN_ERR "%s: door locking not supported\n",
163 drive->name);
164 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
165 stat = 0;
166 }
167
168 /* no medium, that's alright. */
169 if (stat != 0 && sshdr.sense_key == NOT_READY && sshdr.asc == 0x3a)
170 stat = 0;
171
172 if (stat == 0) {
173 if (lockflag)
174 drive->atapi_flags |= IDE_AFLAG_DOOR_LOCKED;
175 else
176 drive->atapi_flags &= ~IDE_AFLAG_DOOR_LOCKED;
177 }
178
179 return stat;
180}
181
182int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position)
183{
184 ide_drive_t *drive = cdi->handle;
185
186 if (position) {
187 int stat = ide_cd_lockdoor(drive, 0);
188
189 if (stat)
190 return stat;
191 }
192
193 return cdrom_eject(drive, !position);
194}
195
196int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
197{
198 ide_drive_t *drive = cdi->handle;
199
200 return ide_cd_lockdoor(drive, lock);
201}
202
203/*
204 * ATAPI devices are free to select the speed you request or any slower
205 * rate. :-( Requesting too fast a speed will _not_ produce an error.
206 */
207int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
208{
209 ide_drive_t *drive = cdi->handle;
210 struct cdrom_info *cd = drive->driver_data;
211 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
212 int stat;
213 unsigned char cmd[BLK_MAX_CDB];
214
215 if (speed == 0)
216 speed = 0xffff; /* set to max */
217 else
218 speed *= 177; /* Nx to kbytes/s */
219
220 memset(cmd, 0, BLK_MAX_CDB);
221
222 cmd[0] = GPCMD_SET_SPEED;
223 /* Read Drive speed in kbytes/second MSB/LSB */
224 cmd[2] = (speed >> 8) & 0xff;
225 cmd[3] = speed & 0xff;
226 if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
227 (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
228 /* Write Drive speed in kbytes/second MSB/LSB */
229 cmd[4] = (speed >> 8) & 0xff;
230 cmd[5] = speed & 0xff;
231 }
232
233 stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, NULL, 0, 0);
234
235 if (!ide_cdrom_get_capabilities(drive, buf)) {
236 ide_cdrom_update_speed(drive, buf);
237 cdi->speed = cd->current_speed;
238 }
239
240 return 0;
241}
242
243int ide_cdrom_get_last_session(struct cdrom_device_info *cdi,
244 struct cdrom_multisession *ms_info)
245{
246 struct atapi_toc *toc;
247 ide_drive_t *drive = cdi->handle;
248 struct cdrom_info *info = drive->driver_data;
249 int ret;
250
251 if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0 || !info->toc) {
252 ret = ide_cd_read_toc(drive);
253 if (ret)
254 return ret;
255 }
256
257 toc = info->toc;
258 ms_info->addr.lba = toc->last_session_lba;
259 ms_info->xa_flag = toc->xa_flag;
260
261 return 0;
262}
263
264int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
265 struct cdrom_mcn *mcn_info)
266{
267 ide_drive_t *drive = cdi->handle;
268 int stat, mcnlen;
269 char buf[24];
270 unsigned char cmd[BLK_MAX_CDB];
271 unsigned len = sizeof(buf);
272
273 memset(cmd, 0, BLK_MAX_CDB);
274
275 cmd[0] = GPCMD_READ_SUBCHANNEL;
276 cmd[1] = 2; /* MSF addressing */
277 cmd[2] = 0x40; /* request subQ data */
278 cmd[3] = 2; /* format */
279 cmd[8] = len;
280
281 stat = ide_cd_queue_pc(drive, cmd, 0, buf, &len, NULL, 0, 0);
282 if (stat)
283 return stat;
284
285 mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
286 memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
287 mcn_info->medium_catalog_number[mcnlen] = '\0';
288
289 return 0;
290}
291
292int ide_cdrom_reset(struct cdrom_device_info *cdi)
293{
294 ide_drive_t *drive = cdi->handle;
295 struct cdrom_info *cd = drive->driver_data;
296 struct request *rq;
297 int ret;
298
299 rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
300 ide_req(rq)->type = ATA_PRIV_MISC;
301 rq->rq_flags = RQF_QUIET;
302 blk_execute_rq(drive->queue, cd->disk, rq, 0);
303 ret = scsi_req(rq)->result ? -EIO : 0;
304 blk_put_request(rq);
305 /*
306 * A reset will unlock the door. If it was previously locked,
307 * lock it again.
308 */
309 if (drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED)
310 (void)ide_cd_lockdoor(drive, 1);
311
312 return ret;
313}
314
315static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
316 struct atapi_toc_entry **ent)
317{
318 struct cdrom_info *info = drive->driver_data;
319 struct atapi_toc *toc = info->toc;
320 int ntracks;
321
322 /*
323 * don't serve cached data, if the toc isn't valid
324 */
325 if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0)
326 return -EINVAL;
327
328 /* Check validity of requested track number. */
329 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
330
331 if (toc->hdr.first_track == CDROM_LEADOUT)
332 ntracks = 0;
333
334 if (track == CDROM_LEADOUT)
335 *ent = &toc->ent[ntracks];
336 else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
337 return -EINVAL;
338 else
339 *ent = &toc->ent[track - toc->hdr.first_track];
340
341 return 0;
342}
343
344static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
345{
346 struct cdrom_ti *ti = arg;
347 struct atapi_toc_entry *first_toc, *last_toc;
348 unsigned long lba_start, lba_end;
349 int stat;
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, NULL, 0, 0);
375}
376
377static 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);
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
396static 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
419int 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 */
441int ide_cdrom_packet(struct cdrom_device_info *cdi,
442 struct packet_command *cgc)
443{
444 ide_drive_t *drive = cdi->handle;
445 req_flags_t 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->sshdr)
456 memset(cgc->sshdr, 0, sizeof(*cgc->sshdr));
457
458 if (cgc->quiet)
459 flags |= RQF_QUIET;
460
461 cgc->stat = ide_cd_queue_pc(drive, cgc->cmd,
462 cgc->data_direction == CGC_DATA_WRITE,
463 cgc->buffer, &len,
464 cgc->sshdr, cgc->timeout, flags);
465 if (!cgc->stat)
466 cgc->buflen -= len;
467 return cgc->stat;
468}