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1/*
2 * ATAPI CD-ROM 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 * Copyright (C) 2005, 2007-2009  Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License.  See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 *
16 * Documentation:
17 *	Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
18 *
19 * For historical changelog please see:
20 *	Documentation/ide/ChangeLog.ide-cd.1994-2004
21 */
22
23#define DRV_NAME "ide-cd"
24#define PFX DRV_NAME ": "
25
26#define IDECD_VERSION "5.00"
27
28#include <linux/module.h>
29#include <linux/types.h>
30#include <linux/kernel.h>
31#include <linux/delay.h>
32#include <linux/timer.h>
33#include <linux/seq_file.h>
34#include <linux/slab.h>
35#include <linux/interrupt.h>
36#include <linux/errno.h>
37#include <linux/cdrom.h>
38#include <linux/ide.h>
39#include <linux/completion.h>
40#include <linux/mutex.h>
41#include <linux/bcd.h>
42
43/* For SCSI -> ATAPI command conversion */
44#include <scsi/scsi.h>
45
46#include <linux/io.h>
47#include <asm/byteorder.h>
48#include <linux/uaccess.h>
49#include <asm/unaligned.h>
50
51#include "ide-cd.h"
52
53static DEFINE_MUTEX(ide_cd_mutex);
54static DEFINE_MUTEX(idecd_ref_mutex);
55
56static void ide_cd_release(struct device *);
57
58static struct cdrom_info *ide_cd_get(struct gendisk *disk)
59{
60	struct cdrom_info *cd = NULL;
61
62	mutex_lock(&idecd_ref_mutex);
63	cd = ide_drv_g(disk, cdrom_info);
64	if (cd) {
65		if (ide_device_get(cd->drive))
66			cd = NULL;
67		else
68			get_device(&cd->dev);
69
70	}
71	mutex_unlock(&idecd_ref_mutex);
72	return cd;
73}
74
75static void ide_cd_put(struct cdrom_info *cd)
76{
77	ide_drive_t *drive = cd->drive;
78
79	mutex_lock(&idecd_ref_mutex);
80	put_device(&cd->dev);
81	ide_device_put(drive);
82	mutex_unlock(&idecd_ref_mutex);
83}
84
85/*
86 * Generic packet command support and error handling routines.
87 */
88
89/* Mark that we've seen a media change and invalidate our internal buffers. */
90static void cdrom_saw_media_change(ide_drive_t *drive)
91{
92	drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
93	drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
94}
95
96static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
97{
98	struct request_sense *sense = &drive->sense_data;
99	int log = 0;
100
101	if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
102		return 0;
103
104	ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
105
106	switch (sense->sense_key) {
107	case NO_SENSE:
108	case RECOVERED_ERROR:
109		break;
110	case NOT_READY:
111		/*
112		 * don't care about tray state messages for e.g. capacity
113		 * commands or in-progress or becoming ready
114		 */
115		if (sense->asc == 0x3a || sense->asc == 0x04)
116			break;
117		log = 1;
118		break;
119	case ILLEGAL_REQUEST:
120		/*
121		 * don't log START_STOP unit with LoEj set, since we cannot
122		 * reliably check if drive can auto-close
123		 */
124		if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
125			break;
126		log = 1;
127		break;
128	case UNIT_ATTENTION:
129		/*
130		 * Make good and sure we've seen this potential media change.
131		 * Some drives (i.e. Creative) fail to present the correct sense
132		 * key in the error register.
133		 */
134		cdrom_saw_media_change(drive);
135		break;
136	default:
137		log = 1;
138		break;
139	}
140	return log;
141}
142
143static void cdrom_analyze_sense_data(ide_drive_t *drive,
144				     struct request *failed_command)
145{
146	struct request_sense *sense = &drive->sense_data;
147	struct cdrom_info *info = drive->driver_data;
148	unsigned long sector;
149	unsigned long bio_sectors;
150
151	ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
152				     sense->error_code, sense->sense_key);
153
154	if (failed_command)
155		ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
156					     failed_command->cmd[0]);
157
158	if (!cdrom_log_sense(drive, failed_command))
159		return;
160
161	/*
162	 * If a read toc is executed for a CD-R or CD-RW medium where the first
163	 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
164	 * confusing error)
165	 */
166	if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
167		if (sense->sense_key == 0x05 && sense->asc == 0x24)
168			return;
169
170	/* current error */
171	if (sense->error_code == 0x70) {
172		switch (sense->sense_key) {
173		case MEDIUM_ERROR:
174		case VOLUME_OVERFLOW:
175		case ILLEGAL_REQUEST:
176			if (!sense->valid)
177				break;
178			if (failed_command == NULL ||
179			    failed_command->cmd_type != REQ_TYPE_FS)
180				break;
181			sector = (sense->information[0] << 24) |
182				 (sense->information[1] << 16) |
183				 (sense->information[2] <<  8) |
184				 (sense->information[3]);
185
186			if (queue_logical_block_size(drive->queue) == 2048)
187				/* device sector size is 2K */
188				sector <<= 2;
189
190			bio_sectors = max(bio_sectors(failed_command->bio), 4U);
191			sector &= ~(bio_sectors - 1);
192
193			/*
194			 * The SCSI specification allows for the value
195			 * returned by READ CAPACITY to be up to 75 2K
196			 * sectors past the last readable block.
197			 * Therefore, if we hit a medium error within the
198			 * last 75 2K sectors, we decrease the saved size
199			 * value.
200			 */
201			if (sector < get_capacity(info->disk) &&
202			    drive->probed_capacity - sector < 4 * 75)
203				set_capacity(info->disk, sector);
204		}
205	}
206
207	ide_cd_log_error(drive->name, failed_command, sense);
208}
209
210static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
211{
212	/*
213	 * For REQ_TYPE_SENSE, "rq->special" points to the original
214	 * failed request.  Also, the sense data should be read
215	 * directly from rq which might be different from the original
216	 * sense buffer if it got copied during mapping.
217	 */
218	struct request *failed = (struct request *)rq->special;
219	void *sense = bio_data(rq->bio);
220
221	if (failed) {
222		if (failed->sense) {
223			/*
224			 * Sense is always read into drive->sense_data.
225			 * Copy back if the failed request has its
226			 * sense pointer set.
227			 */
228			memcpy(failed->sense, sense, 18);
229			failed->sense_len = rq->sense_len;
230		}
231		cdrom_analyze_sense_data(drive, failed);
232
233		if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
234			BUG();
235	} else
236		cdrom_analyze_sense_data(drive, NULL);
237}
238
239
240/*
241 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
242 * while flushing data from cache.
243 *
244 * returns: 0 failed (write timeout expired)
245 *	    1 success
246 */
247static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
248{
249
250	struct cdrom_info *info = drive->driver_data;
251
252	if (!rq->errors)
253		info->write_timeout = jiffies +	ATAPI_WAIT_WRITE_BUSY;
254
255	rq->errors = 1;
256
257	if (time_after(jiffies, info->write_timeout))
258		return 0;
259	else {
260		/*
261		 * take a breather
262		 */
263		blk_delay_queue(drive->queue, 1);
264		return 1;
265	}
266}
267
268/**
269 * Returns:
270 * 0: if the request should be continued.
271 * 1: if the request will be going through error recovery.
272 * 2: if the request should be ended.
273 */
274static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
275{
276	ide_hwif_t *hwif = drive->hwif;
277	struct request *rq = hwif->rq;
278	int err, sense_key, do_end_request = 0;
279
280	/* get the IDE error register */
281	err = ide_read_error(drive);
282	sense_key = err >> 4;
283
284	ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
285				  "stat 0x%x",
286				  rq->cmd[0], rq->cmd_type, err, stat);
287
288	if (rq->cmd_type == REQ_TYPE_SENSE) {
289		/*
290		 * We got an error trying to get sense info from the drive
291		 * (probably while trying to recover from a former error).
292		 * Just give up.
293		 */
294		rq->cmd_flags |= REQ_FAILED;
295		return 2;
296	}
297
298	/* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
299	if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors)
300		rq->errors = SAM_STAT_CHECK_CONDITION;
301
302	if (blk_noretry_request(rq))
303		do_end_request = 1;
304
305	switch (sense_key) {
306	case NOT_READY:
307		if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) {
308			if (ide_cd_breathe(drive, rq))
309				return 1;
310		} else {
311			cdrom_saw_media_change(drive);
312
313			if (rq->cmd_type == REQ_TYPE_FS &&
314			    !(rq->cmd_flags & REQ_QUIET))
315				printk(KERN_ERR PFX "%s: tray open\n",
316					drive->name);
317		}
318		do_end_request = 1;
319		break;
320	case UNIT_ATTENTION:
321		cdrom_saw_media_change(drive);
322
323		if (rq->cmd_type != REQ_TYPE_FS)
324			return 0;
325
326		/*
327		 * Arrange to retry the request but be sure to give up if we've
328		 * retried too many times.
329		 */
330		if (++rq->errors > ERROR_MAX)
331			do_end_request = 1;
332		break;
333	case ILLEGAL_REQUEST:
334		/*
335		 * Don't print error message for this condition -- SFF8090i
336		 * indicates that 5/24/00 is the correct response to a request
337		 * to close the tray if the drive doesn't have that capability.
338		 *
339		 * cdrom_log_sense() knows this!
340		 */
341		if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
342			break;
343		/* fall-through */
344	case DATA_PROTECT:
345		/*
346		 * No point in retrying after an illegal request or data
347		 * protect error.
348		 */
349		if (!(rq->cmd_flags & REQ_QUIET))
350			ide_dump_status(drive, "command error", stat);
351		do_end_request = 1;
352		break;
353	case MEDIUM_ERROR:
354		/*
355		 * No point in re-trying a zillion times on a bad sector.
356		 * If we got here the error is not correctable.
357		 */
358		if (!(rq->cmd_flags & REQ_QUIET))
359			ide_dump_status(drive, "media error "
360					"(bad sector)", stat);
361		do_end_request = 1;
362		break;
363	case BLANK_CHECK:
364		/* disk appears blank? */
365		if (!(rq->cmd_flags & REQ_QUIET))
366			ide_dump_status(drive, "media error (blank)",
367					stat);
368		do_end_request = 1;
369		break;
370	default:
371		if (rq->cmd_type != REQ_TYPE_FS)
372			break;
373		if (err & ~ATA_ABORTED) {
374			/* go to the default handler for other errors */
375			ide_error(drive, "cdrom_decode_status", stat);
376			return 1;
377		} else if (++rq->errors > ERROR_MAX)
378			/* we've racked up too many retries, abort */
379			do_end_request = 1;
380	}
381
382	if (rq->cmd_type != REQ_TYPE_FS) {
383		rq->cmd_flags |= REQ_FAILED;
384		do_end_request = 1;
385	}
386
387	/*
388	 * End a request through request sense analysis when we have sense data.
389	 * We need this in order to perform end of media processing.
390	 */
391	if (do_end_request)
392		goto end_request;
393
394	/* if we got a CHECK_CONDITION status, queue a request sense command */
395	if (stat & ATA_ERR)
396		return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
397	return 1;
398
399end_request:
400	if (stat & ATA_ERR) {
401		hwif->rq = NULL;
402		return ide_queue_sense_rq(drive, rq) ? 2 : 1;
403	} else
404		return 2;
405}
406
407static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
408{
409	struct request *rq = cmd->rq;
410
411	ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
412
413	/*
414	 * Some of the trailing request sense fields are optional,
415	 * and some drives don't send them.  Sigh.
416	 */
417	if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
418	    cmd->nleft > 0 && cmd->nleft <= 5)
419		cmd->nleft = 0;
420}
421
422int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
423		    int write, void *buffer, unsigned *bufflen,
424		    struct request_sense *sense, int timeout,
425		    unsigned int cmd_flags)
426{
427	struct cdrom_info *info = drive->driver_data;
428	struct request_sense local_sense;
429	int retries = 10;
430	unsigned int flags = 0;
431
432	if (!sense)
433		sense = &local_sense;
434
435	ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
436				  "cmd_flags: 0x%x",
437				  cmd[0], write, timeout, cmd_flags);
438
439	/* start of retry loop */
440	do {
441		struct request *rq;
442		int error;
443
444		rq = blk_get_request(drive->queue, write, __GFP_WAIT);
445
446		memcpy(rq->cmd, cmd, BLK_MAX_CDB);
447		rq->cmd_type = REQ_TYPE_ATA_PC;
448		rq->sense = sense;
449		rq->cmd_flags |= cmd_flags;
450		rq->timeout = timeout;
451		if (buffer) {
452			error = blk_rq_map_kern(drive->queue, rq, buffer,
453						*bufflen, GFP_NOIO);
454			if (error) {
455				blk_put_request(rq);
456				return error;
457			}
458		}
459
460		error = blk_execute_rq(drive->queue, info->disk, rq, 0);
461
462		if (buffer)
463			*bufflen = rq->resid_len;
464
465		flags = rq->cmd_flags;
466		blk_put_request(rq);
467
468		/*
469		 * FIXME: we should probably abort/retry or something in case of
470		 * failure.
471		 */
472		if (flags & REQ_FAILED) {
473			/*
474			 * The request failed.  Retry if it was due to a unit
475			 * attention status (usually means media was changed).
476			 */
477			struct request_sense *reqbuf = sense;
478
479			if (reqbuf->sense_key == UNIT_ATTENTION)
480				cdrom_saw_media_change(drive);
481			else if (reqbuf->sense_key == NOT_READY &&
482				 reqbuf->asc == 4 && reqbuf->ascq != 4) {
483				/*
484				 * The drive is in the process of loading
485				 * a disk.  Retry, but wait a little to give
486				 * the drive time to complete the load.
487				 */
488				ssleep(2);
489			} else {
490				/* otherwise, don't retry */
491				retries = 0;
492			}
493			--retries;
494		}
495
496		/* end of retry loop */
497	} while ((flags & REQ_FAILED) && retries >= 0);
498
499	/* return an error if the command failed */
500	return (flags & REQ_FAILED) ? -EIO : 0;
501}
502
503/*
504 * returns true if rq has been completed
505 */
506static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
507{
508	unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
509
510	if (cmd->tf_flags & IDE_TFLAG_WRITE)
511		nr_bytes -= cmd->last_xfer_len;
512
513	if (nr_bytes > 0) {
514		ide_complete_rq(drive, 0, nr_bytes);
515		return true;
516	}
517
518	return false;
519}
520
521static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
522{
523	ide_hwif_t *hwif = drive->hwif;
524	struct ide_cmd *cmd = &hwif->cmd;
525	struct request *rq = hwif->rq;
526	ide_expiry_t *expiry = NULL;
527	int dma_error = 0, dma, thislen, uptodate = 0;
528	int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
529	int sense = (rq->cmd_type == REQ_TYPE_SENSE);
530	unsigned int timeout;
531	u16 len;
532	u8 ireason, stat;
533
534	ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
535
536	/* check for errors */
537	dma = drive->dma;
538	if (dma) {
539		drive->dma = 0;
540		drive->waiting_for_dma = 0;
541		dma_error = hwif->dma_ops->dma_end(drive);
542		ide_dma_unmap_sg(drive, cmd);
543		if (dma_error) {
544			printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
545					write ? "write" : "read");
546			ide_dma_off(drive);
547		}
548	}
549
550	/* check status */
551	stat = hwif->tp_ops->read_status(hwif);
552
553	if (!OK_STAT(stat, 0, BAD_R_STAT)) {
554		rc = cdrom_decode_status(drive, stat);
555		if (rc) {
556			if (rc == 2)
557				goto out_end;
558			return ide_stopped;
559		}
560	}
561
562	/* using dma, transfer is complete now */
563	if (dma) {
564		if (dma_error)
565			return ide_error(drive, "dma error", stat);
566		uptodate = 1;
567		goto out_end;
568	}
569
570	ide_read_bcount_and_ireason(drive, &len, &ireason);
571
572	thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
573	if (thislen > len)
574		thislen = len;
575
576	ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
577				  stat, thislen);
578
579	/* If DRQ is clear, the command has completed. */
580	if ((stat & ATA_DRQ) == 0) {
581		if (rq->cmd_type == REQ_TYPE_FS) {
582			/*
583			 * If we're not done reading/writing, complain.
584			 * Otherwise, complete the command normally.
585			 */
586			uptodate = 1;
587			if (cmd->nleft > 0) {
588				printk(KERN_ERR PFX "%s: %s: data underrun "
589					"(%u bytes)\n", drive->name, __func__,
590					cmd->nleft);
591				if (!write)
592					rq->cmd_flags |= REQ_FAILED;
593				uptodate = 0;
594			}
595		} else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
596			ide_cd_request_sense_fixup(drive, cmd);
597
598			uptodate = cmd->nleft ? 0 : 1;
599
600			/*
601			 * suck out the remaining bytes from the drive in an
602			 * attempt to complete the data xfer. (see BZ#13399)
603			 */
604			if (!(stat & ATA_ERR) && !uptodate && thislen) {
605				ide_pio_bytes(drive, cmd, write, thislen);
606				uptodate = cmd->nleft ? 0 : 1;
607			}
608
609			if (!uptodate)
610				rq->cmd_flags |= REQ_FAILED;
611		}
612		goto out_end;
613	}
614
615	rc = ide_check_ireason(drive, rq, len, ireason, write);
616	if (rc)
617		goto out_end;
618
619	cmd->last_xfer_len = 0;
620
621	ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
622				  "ireason: 0x%x",
623				  rq->cmd_type, ireason);
624
625	/* transfer data */
626	while (thislen > 0) {
627		int blen = min_t(int, thislen, cmd->nleft);
628
629		if (cmd->nleft == 0)
630			break;
631
632		ide_pio_bytes(drive, cmd, write, blen);
633		cmd->last_xfer_len += blen;
634
635		thislen -= blen;
636		len -= blen;
637
638		if (sense && write == 0)
639			rq->sense_len += blen;
640	}
641
642	/* pad, if necessary */
643	if (len > 0) {
644		if (rq->cmd_type != REQ_TYPE_FS || write == 0)
645			ide_pad_transfer(drive, write, len);
646		else {
647			printk(KERN_ERR PFX "%s: confused, missing data\n",
648				drive->name);
649			blk_dump_rq_flags(rq, "cdrom_newpc_intr");
650		}
651	}
652
653	if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
654		timeout = rq->timeout;
655	} else {
656		timeout = ATAPI_WAIT_PC;
657		if (rq->cmd_type != REQ_TYPE_FS)
658			expiry = ide_cd_expiry;
659	}
660
661	hwif->expiry = expiry;
662	ide_set_handler(drive, cdrom_newpc_intr, timeout);
663	return ide_started;
664
665out_end:
666	if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
667		rq->resid_len = 0;
668		blk_end_request_all(rq, 0);
669		hwif->rq = NULL;
670	} else {
671		if (sense && uptodate)
672			ide_cd_complete_failed_rq(drive, rq);
673
674		if (rq->cmd_type == REQ_TYPE_FS) {
675			if (cmd->nleft == 0)
676				uptodate = 1;
677		} else {
678			if (uptodate <= 0 && rq->errors == 0)
679				rq->errors = -EIO;
680		}
681
682		if (uptodate == 0 && rq->bio)
683			if (ide_cd_error_cmd(drive, cmd))
684				return ide_stopped;
685
686		/* make sure it's fully ended */
687		if (rq->cmd_type != REQ_TYPE_FS) {
688			rq->resid_len -= cmd->nbytes - cmd->nleft;
689			if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
690				rq->resid_len += cmd->last_xfer_len;
691		}
692
693		ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
694
695		if (sense && rc == 2)
696			ide_error(drive, "request sense failure", stat);
697	}
698	return ide_stopped;
699}
700
701static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
702{
703	struct cdrom_info *cd = drive->driver_data;
704	struct request_queue *q = drive->queue;
705	int write = rq_data_dir(rq) == WRITE;
706	unsigned short sectors_per_frame =
707		queue_logical_block_size(q) >> SECTOR_BITS;
708
709	ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
710				  "secs_per_frame: %u",
711				  rq->cmd[0], rq->cmd_flags, sectors_per_frame);
712
713	if (write) {
714		/* disk has become write protected */
715		if (get_disk_ro(cd->disk))
716			return ide_stopped;
717	} else {
718		/*
719		 * We may be retrying this request after an error.  Fix up any
720		 * weirdness which might be present in the request packet.
721		 */
722		q->prep_rq_fn(q, rq);
723	}
724
725	/* fs requests *must* be hardware frame aligned */
726	if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
727	    (blk_rq_pos(rq) & (sectors_per_frame - 1)))
728		return ide_stopped;
729
730	/* use DMA, if possible */
731	drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
732
733	if (write)
734		cd->devinfo.media_written = 1;
735
736	rq->timeout = ATAPI_WAIT_PC;
737
738	return ide_started;
739}
740
741static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
742{
743
744	ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
745				  rq->cmd[0], rq->cmd_type);
746
747	if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
748		rq->cmd_flags |= REQ_QUIET;
749	else
750		rq->cmd_flags &= ~REQ_FAILED;
751
752	drive->dma = 0;
753
754	/* sg request */
755	if (rq->bio) {
756		struct request_queue *q = drive->queue;
757		char *buf = bio_data(rq->bio);
758		unsigned int alignment;
759
760		drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
761
762		/*
763		 * check if dma is safe
764		 *
765		 * NOTE! The "len" and "addr" checks should possibly have
766		 * separate masks.
767		 */
768		alignment = queue_dma_alignment(q) | q->dma_pad_mask;
769		if ((unsigned long)buf & alignment
770		    || blk_rq_bytes(rq) & q->dma_pad_mask
771		    || object_is_on_stack(buf))
772			drive->dma = 0;
773	}
774}
775
776static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
777					sector_t block)
778{
779	struct ide_cmd cmd;
780	int uptodate = 0;
781	unsigned int nsectors;
782
783	ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
784				  rq->cmd[0], (unsigned long long)block);
785
786	if (drive->debug_mask & IDE_DBG_RQ)
787		blk_dump_rq_flags(rq, "ide_cd_do_request");
788
789	switch (rq->cmd_type) {
790	case REQ_TYPE_FS:
791		if (cdrom_start_rw(drive, rq) == ide_stopped)
792			goto out_end;
793		break;
794	case REQ_TYPE_SENSE:
795	case REQ_TYPE_BLOCK_PC:
796	case REQ_TYPE_ATA_PC:
797		if (!rq->timeout)
798			rq->timeout = ATAPI_WAIT_PC;
799
800		cdrom_do_block_pc(drive, rq);
801		break;
802	case REQ_TYPE_SPECIAL:
803		/* right now this can only be a reset... */
804		uptodate = 1;
805		goto out_end;
806	default:
807		BUG();
808	}
809
810	/* prepare sense request for this command */
811	ide_prep_sense(drive, rq);
812
813	memset(&cmd, 0, sizeof(cmd));
814
815	if (rq_data_dir(rq))
816		cmd.tf_flags |= IDE_TFLAG_WRITE;
817
818	cmd.rq = rq;
819
820	if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
821		ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
822		ide_map_sg(drive, &cmd);
823	}
824
825	return ide_issue_pc(drive, &cmd);
826out_end:
827	nsectors = blk_rq_sectors(rq);
828
829	if (nsectors == 0)
830		nsectors = 1;
831
832	ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
833
834	return ide_stopped;
835}
836
837/*
838 * Ioctl handling.
839 *
840 * Routines which queue packet commands take as a final argument a pointer to a
841 * request_sense struct. If execution of the command results in an error with a
842 * CHECK CONDITION status, this structure will be filled with the results of the
843 * subsequent request sense command. The pointer can also be NULL, in which case
844 * no sense information is returned.
845 */
846static void msf_from_bcd(struct atapi_msf *msf)
847{
848	msf->minute = bcd2bin(msf->minute);
849	msf->second = bcd2bin(msf->second);
850	msf->frame  = bcd2bin(msf->frame);
851}
852
853int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
854{
855	struct cdrom_info *info = drive->driver_data;
856	struct cdrom_device_info *cdi = &info->devinfo;
857	unsigned char cmd[BLK_MAX_CDB];
858
859	ide_debug_log(IDE_DBG_FUNC, "enter");
860
861	memset(cmd, 0, BLK_MAX_CDB);
862	cmd[0] = GPCMD_TEST_UNIT_READY;
863
864	/*
865	 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
866	 * instead of supporting the LOAD_UNLOAD opcode.
867	 */
868	cmd[7] = cdi->sanyo_slot % 3;
869
870	return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
871}
872
873static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
874			       unsigned long *sectors_per_frame,
875			       struct request_sense *sense)
876{
877	struct {
878		__be32 lba;
879		__be32 blocklen;
880	} capbuf;
881
882	int stat;
883	unsigned char cmd[BLK_MAX_CDB];
884	unsigned len = sizeof(capbuf);
885	u32 blocklen;
886
887	ide_debug_log(IDE_DBG_FUNC, "enter");
888
889	memset(cmd, 0, BLK_MAX_CDB);
890	cmd[0] = GPCMD_READ_CDVD_CAPACITY;
891
892	stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
893			       REQ_QUIET);
894	if (stat)
895		return stat;
896
897	/*
898	 * Sanity check the given block size, in so far as making
899	 * sure the sectors_per_frame we give to the caller won't
900	 * end up being bogus.
901	 */
902	blocklen = be32_to_cpu(capbuf.blocklen);
903	blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
904	switch (blocklen) {
905	case 512:
906	case 1024:
907	case 2048:
908	case 4096:
909		break;
910	default:
911		printk_once(KERN_ERR PFX "%s: weird block size %u; "
912				"setting default block size to 2048\n",
913				drive->name, blocklen);
914		blocklen = 2048;
915		break;
916	}
917
918	*capacity = 1 + be32_to_cpu(capbuf.lba);
919	*sectors_per_frame = blocklen >> SECTOR_BITS;
920
921	ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
922				     *capacity, *sectors_per_frame);
923
924	return 0;
925}
926
927static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
928				int format, char *buf, int buflen,
929				struct request_sense *sense)
930{
931	unsigned char cmd[BLK_MAX_CDB];
932
933	ide_debug_log(IDE_DBG_FUNC, "enter");
934
935	memset(cmd, 0, BLK_MAX_CDB);
936
937	cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
938	cmd[6] = trackno;
939	cmd[7] = (buflen >> 8);
940	cmd[8] = (buflen & 0xff);
941	cmd[9] = (format << 6);
942
943	if (msf_flag)
944		cmd[1] = 2;
945
946	return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
947}
948
949/* Try to read the entire TOC for the disk into our internal buffer. */
950int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
951{
952	int stat, ntracks, i;
953	struct cdrom_info *info = drive->driver_data;
954	struct cdrom_device_info *cdi = &info->devinfo;
955	struct atapi_toc *toc = info->toc;
956	struct {
957		struct atapi_toc_header hdr;
958		struct atapi_toc_entry  ent;
959	} ms_tmp;
960	long last_written;
961	unsigned long sectors_per_frame = SECTORS_PER_FRAME;
962
963	ide_debug_log(IDE_DBG_FUNC, "enter");
964
965	if (toc == NULL) {
966		/* try to allocate space */
967		toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
968		if (toc == NULL) {
969			printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
970					drive->name);
971			return -ENOMEM;
972		}
973		info->toc = toc;
974	}
975
976	/*
977	 * Check to see if the existing data is still valid. If it is,
978	 * just return.
979	 */
980	(void) cdrom_check_status(drive, sense);
981
982	if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
983		return 0;
984
985	/* try to get the total cdrom capacity and sector size */
986	stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
987				   sense);
988	if (stat)
989		toc->capacity = 0x1fffff;
990
991	set_capacity(info->disk, toc->capacity * sectors_per_frame);
992	/* save a private copy of the TOC capacity for error handling */
993	drive->probed_capacity = toc->capacity * sectors_per_frame;
994
995	blk_queue_logical_block_size(drive->queue,
996				     sectors_per_frame << SECTOR_BITS);
997
998	/* first read just the header, so we know how long the TOC is */
999	stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1000				    sizeof(struct atapi_toc_header), sense);
1001	if (stat)
1002		return stat;
1003
1004	if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1005		toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1006		toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1007	}
1008
1009	ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1010	if (ntracks <= 0)
1011		return -EIO;
1012	if (ntracks > MAX_TRACKS)
1013		ntracks = MAX_TRACKS;
1014
1015	/* now read the whole schmeer */
1016	stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1017				  (char *)&toc->hdr,
1018				   sizeof(struct atapi_toc_header) +
1019				   (ntracks + 1) *
1020				   sizeof(struct atapi_toc_entry), sense);
1021
1022	if (stat && toc->hdr.first_track > 1) {
1023		/*
1024		 * Cds with CDI tracks only don't have any TOC entries, despite
1025		 * of this the returned values are
1026		 * first_track == last_track = number of CDI tracks + 1,
1027		 * so that this case is indistinguishable from the same layout
1028		 * plus an additional audio track. If we get an error for the
1029		 * regular case, we assume a CDI without additional audio
1030		 * tracks. In this case the readable TOC is empty (CDI tracks
1031		 * are not included) and only holds the Leadout entry.
1032		 *
1033		 * Heiko Eißfeldt.
1034		 */
1035		ntracks = 0;
1036		stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1037					   (char *)&toc->hdr,
1038					   sizeof(struct atapi_toc_header) +
1039					   (ntracks + 1) *
1040					   sizeof(struct atapi_toc_entry),
1041					   sense);
1042		if (stat)
1043			return stat;
1044
1045		if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1046			toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1047			toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1048		} else {
1049			toc->hdr.first_track = CDROM_LEADOUT;
1050			toc->hdr.last_track = CDROM_LEADOUT;
1051		}
1052	}
1053
1054	if (stat)
1055		return stat;
1056
1057	toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1058
1059	if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1060		toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1061		toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1062	}
1063
1064	for (i = 0; i <= ntracks; i++) {
1065		if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1066			if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1067				toc->ent[i].track = bcd2bin(toc->ent[i].track);
1068			msf_from_bcd(&toc->ent[i].addr.msf);
1069		}
1070		toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1071						  toc->ent[i].addr.msf.second,
1072						  toc->ent[i].addr.msf.frame);
1073	}
1074
1075	if (toc->hdr.first_track != CDROM_LEADOUT) {
1076		/* read the multisession information */
1077		stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1078					   sizeof(ms_tmp), sense);
1079		if (stat)
1080			return stat;
1081
1082		toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1083	} else {
1084		ms_tmp.hdr.last_track = CDROM_LEADOUT;
1085		ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1086		toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1087	}
1088
1089	if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1090		/* re-read multisession information using MSF format */
1091		stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1092					   sizeof(ms_tmp), sense);
1093		if (stat)
1094			return stat;
1095
1096		msf_from_bcd(&ms_tmp.ent.addr.msf);
1097		toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1098						   ms_tmp.ent.addr.msf.second,
1099						   ms_tmp.ent.addr.msf.frame);
1100	}
1101
1102	toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1103
1104	/* now try to get the total cdrom capacity */
1105	stat = cdrom_get_last_written(cdi, &last_written);
1106	if (!stat && (last_written > toc->capacity)) {
1107		toc->capacity = last_written;
1108		set_capacity(info->disk, toc->capacity * sectors_per_frame);
1109		drive->probed_capacity = toc->capacity * sectors_per_frame;
1110	}
1111
1112	/* Remember that we've read this stuff. */
1113	drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1114
1115	return 0;
1116}
1117
1118int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1119{
1120	struct cdrom_info *info = drive->driver_data;
1121	struct cdrom_device_info *cdi = &info->devinfo;
1122	struct packet_command cgc;
1123	int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1124
1125	ide_debug_log(IDE_DBG_FUNC, "enter");
1126
1127	if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1128		size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1129
1130	init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1131	do {
1132		/* we seem to get stat=0x01,err=0x00 the first time (??) */
1133		stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1134		if (!stat)
1135			break;
1136	} while (--attempts);
1137	return stat;
1138}
1139
1140void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1141{
1142	struct cdrom_info *cd = drive->driver_data;
1143	u16 curspeed, maxspeed;
1144
1145	ide_debug_log(IDE_DBG_FUNC, "enter");
1146
1147	if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1148		curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1149		maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1150	} else {
1151		curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1152		maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1153	}
1154
1155	ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1156				     curspeed, maxspeed);
1157
1158	cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1159	cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1160}
1161
1162#define IDE_CD_CAPABILITIES \
1163	(CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1164	 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1165	 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1166	 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1167	 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1168
1169static struct cdrom_device_ops ide_cdrom_dops = {
1170	.open			= ide_cdrom_open_real,
1171	.release		= ide_cdrom_release_real,
1172	.drive_status		= ide_cdrom_drive_status,
1173	.check_events		= ide_cdrom_check_events_real,
1174	.tray_move		= ide_cdrom_tray_move,
1175	.lock_door		= ide_cdrom_lock_door,
1176	.select_speed		= ide_cdrom_select_speed,
1177	.get_last_session	= ide_cdrom_get_last_session,
1178	.get_mcn		= ide_cdrom_get_mcn,
1179	.reset			= ide_cdrom_reset,
1180	.audio_ioctl		= ide_cdrom_audio_ioctl,
1181	.capability		= IDE_CD_CAPABILITIES,
1182	.generic_packet		= ide_cdrom_packet,
1183};
1184
1185static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1186{
1187	struct cdrom_info *info = drive->driver_data;
1188	struct cdrom_device_info *devinfo = &info->devinfo;
1189
1190	ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1191
1192	devinfo->ops = &ide_cdrom_dops;
1193	devinfo->speed = info->current_speed;
1194	devinfo->capacity = nslots;
1195	devinfo->handle = drive;
1196	strcpy(devinfo->name, drive->name);
1197
1198	if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1199		devinfo->mask |= CDC_SELECT_SPEED;
1200
1201	devinfo->disk = info->disk;
1202	return register_cdrom(devinfo);
1203}
1204
1205static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1206{
1207	struct cdrom_info *cd = drive->driver_data;
1208	struct cdrom_device_info *cdi = &cd->devinfo;
1209	u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1210	mechtype_t mechtype;
1211	int nslots = 1;
1212
1213	ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1214				     drive->media, drive->atapi_flags);
1215
1216	cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1217		     CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1218		     CDC_MO_DRIVE | CDC_RAM);
1219
1220	if (drive->media == ide_optical) {
1221		cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1222		printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1223				drive->name);
1224		return nslots;
1225	}
1226
1227	if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1228		drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1229		cdi->mask &= ~CDC_PLAY_AUDIO;
1230		return nslots;
1231	}
1232
1233	/*
1234	 * We have to cheat a little here. the packet will eventually be queued
1235	 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1236	 * Since this device hasn't been registered with the Uniform layer yet,
1237	 * it can't do this. Same goes for cdi->ops.
1238	 */
1239	cdi->handle = drive;
1240	cdi->ops = &ide_cdrom_dops;
1241
1242	if (ide_cdrom_get_capabilities(drive, buf))
1243		return 0;
1244
1245	if ((buf[8 + 6] & 0x01) == 0)
1246		drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1247	if (buf[8 + 6] & 0x08)
1248		drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1249	if (buf[8 + 3] & 0x01)
1250		cdi->mask &= ~CDC_CD_R;
1251	if (buf[8 + 3] & 0x02)
1252		cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1253	if (buf[8 + 2] & 0x38)
1254		cdi->mask &= ~CDC_DVD;
1255	if (buf[8 + 3] & 0x20)
1256		cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1257	if (buf[8 + 3] & 0x10)
1258		cdi->mask &= ~CDC_DVD_R;
1259	if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1260		cdi->mask &= ~CDC_PLAY_AUDIO;
1261
1262	mechtype = buf[8 + 6] >> 5;
1263	if (mechtype == mechtype_caddy ||
1264	    mechtype == mechtype_popup ||
1265	    (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1266		cdi->mask |= CDC_CLOSE_TRAY;
1267
1268	if (cdi->sanyo_slot > 0) {
1269		cdi->mask &= ~CDC_SELECT_DISC;
1270		nslots = 3;
1271	} else if (mechtype == mechtype_individual_changer ||
1272		   mechtype == mechtype_cartridge_changer) {
1273		nslots = cdrom_number_of_slots(cdi);
1274		if (nslots > 1)
1275			cdi->mask &= ~CDC_SELECT_DISC;
1276	}
1277
1278	ide_cdrom_update_speed(drive, buf);
1279
1280	printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1281
1282	/* don't print speed if the drive reported 0 */
1283	if (cd->max_speed)
1284		printk(KERN_CONT " %dX", cd->max_speed);
1285
1286	printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1287
1288	if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1289		printk(KERN_CONT " DVD%s%s",
1290				 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1291				 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1292
1293	if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1294		printk(KERN_CONT " CD%s%s",
1295				 (cdi->mask & CDC_CD_R) ? "" : "-R",
1296				 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1297
1298	if ((cdi->mask & CDC_SELECT_DISC) == 0)
1299		printk(KERN_CONT " changer w/%d slots", nslots);
1300	else
1301		printk(KERN_CONT " drive");
1302
1303	printk(KERN_CONT ", %dkB Cache\n",
1304			 be16_to_cpup((__be16 *)&buf[8 + 12]));
1305
1306	return nslots;
1307}
1308
1309/* standard prep_rq_fn that builds 10 byte cmds */
1310static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1311{
1312	int hard_sect = queue_logical_block_size(q);
1313	long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1314	unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1315
1316	memset(rq->cmd, 0, BLK_MAX_CDB);
1317
1318	if (rq_data_dir(rq) == READ)
1319		rq->cmd[0] = GPCMD_READ_10;
1320	else
1321		rq->cmd[0] = GPCMD_WRITE_10;
1322
1323	/*
1324	 * fill in lba
1325	 */
1326	rq->cmd[2] = (block >> 24) & 0xff;
1327	rq->cmd[3] = (block >> 16) & 0xff;
1328	rq->cmd[4] = (block >>  8) & 0xff;
1329	rq->cmd[5] = block & 0xff;
1330
1331	/*
1332	 * and transfer length
1333	 */
1334	rq->cmd[7] = (blocks >> 8) & 0xff;
1335	rq->cmd[8] = blocks & 0xff;
1336	rq->cmd_len = 10;
1337	return BLKPREP_OK;
1338}
1339
1340/*
1341 * Most of the SCSI commands are supported directly by ATAPI devices.
1342 * This transform handles the few exceptions.
1343 */
1344static int ide_cdrom_prep_pc(struct request *rq)
1345{
1346	u8 *c = rq->cmd;
1347
1348	/* transform 6-byte read/write commands to the 10-byte version */
1349	if (c[0] == READ_6 || c[0] == WRITE_6) {
1350		c[8] = c[4];
1351		c[5] = c[3];
1352		c[4] = c[2];
1353		c[3] = c[1] & 0x1f;
1354		c[2] = 0;
1355		c[1] &= 0xe0;
1356		c[0] += (READ_10 - READ_6);
1357		rq->cmd_len = 10;
1358		return BLKPREP_OK;
1359	}
1360
1361	/*
1362	 * it's silly to pretend we understand 6-byte sense commands, just
1363	 * reject with ILLEGAL_REQUEST and the caller should take the
1364	 * appropriate action
1365	 */
1366	if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1367		rq->errors = ILLEGAL_REQUEST;
1368		return BLKPREP_KILL;
1369	}
1370
1371	return BLKPREP_OK;
1372}
1373
1374static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1375{
1376	if (rq->cmd_type == REQ_TYPE_FS)
1377		return ide_cdrom_prep_fs(q, rq);
1378	else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
1379		return ide_cdrom_prep_pc(rq);
1380
1381	return 0;
1382}
1383
1384struct cd_list_entry {
1385	const char	*id_model;
1386	const char	*id_firmware;
1387	unsigned int	cd_flags;
1388};
1389
1390#ifdef CONFIG_IDE_PROC_FS
1391static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1392{
1393	unsigned long capacity, sectors_per_frame;
1394
1395	if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1396		return 0;
1397
1398	return capacity * sectors_per_frame;
1399}
1400
1401static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1402{
1403	ide_drive_t *drive = m->private;
1404
1405	seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1406	return 0;
1407}
1408
1409static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1410{
1411	return single_open(file, idecd_capacity_proc_show, PDE_DATA(inode));
1412}
1413
1414static const struct file_operations idecd_capacity_proc_fops = {
1415	.owner		= THIS_MODULE,
1416	.open		= idecd_capacity_proc_open,
1417	.read		= seq_read,
1418	.llseek		= seq_lseek,
1419	.release	= single_release,
1420};
1421
1422static ide_proc_entry_t idecd_proc[] = {
1423	{ "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1424	{}
1425};
1426
1427static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1428{
1429	return idecd_proc;
1430}
1431
1432static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1433{
1434	return NULL;
1435}
1436#endif
1437
1438static const struct cd_list_entry ide_cd_quirks_list[] = {
1439	/* SCR-3231 doesn't support the SET_CD_SPEED command. */
1440	{ "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT	     },
1441	/* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1442	{ "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1443					     IDE_AFLAG_PRE_ATAPI12,	     },
1444	/* Vertos 300, some versions of this drive like to talk BCD. */
1445	{ "V003S0DS",		     NULL,   IDE_AFLAG_VERTOS_300_SSD,	     },
1446	/* Vertos 600 ESD. */
1447	{ "V006E0DS",		     NULL,   IDE_AFLAG_VERTOS_600_ESD,	     },
1448	/*
1449	 * Sanyo 3 CD changer uses a non-standard command for CD changing
1450	 * (by default standard ATAPI support for CD changers is used).
1451	 */
1452	{ "CD-ROM CDR-C3 G",	     NULL,   IDE_AFLAG_SANYO_3CD	     },
1453	{ "CD-ROM CDR-C3G",	     NULL,   IDE_AFLAG_SANYO_3CD	     },
1454	{ "CD-ROM CDR_C36",	     NULL,   IDE_AFLAG_SANYO_3CD	     },
1455	/* Stingray 8X CD-ROM. */
1456	{ "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1457	/*
1458	 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1459	 * mode sense page capabilities size, but older drives break.
1460	 */
1461	{ "ATAPI CD ROM DRIVE 50X MAX",	NULL,	IDE_AFLAG_FULL_CAPS_PAGE     },
1462	{ "WPI CDS-32X",		NULL,	IDE_AFLAG_FULL_CAPS_PAGE     },
1463	/* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1464	{ "",			     "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1465	/*
1466	 * Some drives used by Apple don't advertise audio play
1467	 * but they do support reading TOC & audio datas.
1468	 */
1469	{ "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK	     },
1470	{ "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK	     },
1471	{ "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK	     },
1472	{ "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK	     },
1473	{ "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK	     },
1474	{ "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK	     },
1475	{ "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE	     },
1476	{ "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE	     },
1477	{ NULL, NULL, 0 }
1478};
1479
1480static unsigned int ide_cd_flags(u16 *id)
1481{
1482	const struct cd_list_entry *cle = ide_cd_quirks_list;
1483
1484	while (cle->id_model) {
1485		if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1486		    (cle->id_firmware == NULL ||
1487		     strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1488			return cle->cd_flags;
1489		cle++;
1490	}
1491
1492	return 0;
1493}
1494
1495static int ide_cdrom_setup(ide_drive_t *drive)
1496{
1497	struct cdrom_info *cd = drive->driver_data;
1498	struct cdrom_device_info *cdi = &cd->devinfo;
1499	struct request_queue *q = drive->queue;
1500	u16 *id = drive->id;
1501	char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1502	int nslots;
1503
1504	ide_debug_log(IDE_DBG_PROBE, "enter");
1505
1506	blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1507	blk_queue_dma_alignment(q, 31);
1508	blk_queue_update_dma_pad(q, 15);
1509
1510	drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1511	drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1512
1513	if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1514	    fw_rev[4] == '1' && fw_rev[6] <= '2')
1515		drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1516				     IDE_AFLAG_TOCADDR_AS_BCD);
1517	else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1518		 fw_rev[4] == '1' && fw_rev[6] <= '2')
1519		drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1520	else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1521		/* 3 => use CD in slot 0 */
1522		cdi->sanyo_slot = 3;
1523
1524	nslots = ide_cdrom_probe_capabilities(drive);
1525
1526	blk_queue_logical_block_size(q, CD_FRAMESIZE);
1527
1528	if (ide_cdrom_register(drive, nslots)) {
1529		printk(KERN_ERR PFX "%s: %s failed to register device with the"
1530				" cdrom driver.\n", drive->name, __func__);
1531		cd->devinfo.handle = NULL;
1532		return 1;
1533	}
1534
1535	ide_proc_register_driver(drive, cd->driver);
1536	return 0;
1537}
1538
1539static void ide_cd_remove(ide_drive_t *drive)
1540{
1541	struct cdrom_info *info = drive->driver_data;
1542
1543	ide_debug_log(IDE_DBG_FUNC, "enter");
1544
1545	ide_proc_unregister_driver(drive, info->driver);
1546	device_del(&info->dev);
1547	del_gendisk(info->disk);
1548
1549	mutex_lock(&idecd_ref_mutex);
1550	put_device(&info->dev);
1551	mutex_unlock(&idecd_ref_mutex);
1552}
1553
1554static void ide_cd_release(struct device *dev)
1555{
1556	struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1557	struct cdrom_device_info *devinfo = &info->devinfo;
1558	ide_drive_t *drive = info->drive;
1559	struct gendisk *g = info->disk;
1560
1561	ide_debug_log(IDE_DBG_FUNC, "enter");
1562
1563	kfree(info->toc);
1564	if (devinfo->handle == drive)
1565		unregister_cdrom(devinfo);
1566	drive->driver_data = NULL;
1567	blk_queue_prep_rq(drive->queue, NULL);
1568	g->private_data = NULL;
1569	put_disk(g);
1570	kfree(info);
1571}
1572
1573static int ide_cd_probe(ide_drive_t *);
1574
1575static struct ide_driver ide_cdrom_driver = {
1576	.gen_driver = {
1577		.owner		= THIS_MODULE,
1578		.name		= "ide-cdrom",
1579		.bus		= &ide_bus_type,
1580	},
1581	.probe			= ide_cd_probe,
1582	.remove			= ide_cd_remove,
1583	.version		= IDECD_VERSION,
1584	.do_request		= ide_cd_do_request,
1585#ifdef CONFIG_IDE_PROC_FS
1586	.proc_entries		= ide_cd_proc_entries,
1587	.proc_devsets		= ide_cd_proc_devsets,
1588#endif
1589};
1590
1591static int idecd_open(struct block_device *bdev, fmode_t mode)
1592{
1593	struct cdrom_info *info;
1594	int rc = -ENXIO;
1595
1596	mutex_lock(&ide_cd_mutex);
1597	info = ide_cd_get(bdev->bd_disk);
1598	if (!info)
1599		goto out;
1600
1601	rc = cdrom_open(&info->devinfo, bdev, mode);
1602	if (rc < 0)
1603		ide_cd_put(info);
1604out:
1605	mutex_unlock(&ide_cd_mutex);
1606	return rc;
1607}
1608
1609static void idecd_release(struct gendisk *disk, fmode_t mode)
1610{
1611	struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1612
1613	mutex_lock(&ide_cd_mutex);
1614	cdrom_release(&info->devinfo, mode);
1615
1616	ide_cd_put(info);
1617	mutex_unlock(&ide_cd_mutex);
1618}
1619
1620static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1621{
1622	struct packet_command cgc;
1623	char buffer[16];
1624	int stat;
1625	char spindown;
1626
1627	if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1628		return -EFAULT;
1629
1630	init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1631
1632	stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1633	if (stat)
1634		return stat;
1635
1636	buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1637	return cdrom_mode_select(cdi, &cgc);
1638}
1639
1640static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1641{
1642	struct packet_command cgc;
1643	char buffer[16];
1644	int stat;
1645	char spindown;
1646
1647	init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1648
1649	stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1650	if (stat)
1651		return stat;
1652
1653	spindown = buffer[11] & 0x0f;
1654	if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1655		return -EFAULT;
1656	return 0;
1657}
1658
1659static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1660			unsigned int cmd, unsigned long arg)
1661{
1662	struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1663	int err;
1664
1665	switch (cmd) {
1666	case CDROMSETSPINDOWN:
1667		return idecd_set_spindown(&info->devinfo, arg);
1668	case CDROMGETSPINDOWN:
1669		return idecd_get_spindown(&info->devinfo, arg);
1670	default:
1671		break;
1672	}
1673
1674	err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1675	if (err == -EINVAL)
1676		err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1677
1678	return err;
1679}
1680
1681static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1682			     unsigned int cmd, unsigned long arg)
1683{
1684	int ret;
1685
1686	mutex_lock(&ide_cd_mutex);
1687	ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1688	mutex_unlock(&ide_cd_mutex);
1689
1690	return ret;
1691}
1692
1693
1694static unsigned int idecd_check_events(struct gendisk *disk,
1695				       unsigned int clearing)
1696{
1697	struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1698	return cdrom_check_events(&info->devinfo, clearing);
1699}
1700
1701static int idecd_revalidate_disk(struct gendisk *disk)
1702{
1703	struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1704	struct request_sense sense;
1705
1706	ide_cd_read_toc(info->drive, &sense);
1707
1708	return  0;
1709}
1710
1711static const struct block_device_operations idecd_ops = {
1712	.owner			= THIS_MODULE,
1713	.open			= idecd_open,
1714	.release		= idecd_release,
1715	.ioctl			= idecd_ioctl,
1716	.check_events		= idecd_check_events,
1717	.revalidate_disk	= idecd_revalidate_disk
1718};
1719
1720/* module options */
1721static unsigned long debug_mask;
1722module_param(debug_mask, ulong, 0644);
1723
1724MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1725
1726static int ide_cd_probe(ide_drive_t *drive)
1727{
1728	struct cdrom_info *info;
1729	struct gendisk *g;
1730	struct request_sense sense;
1731
1732	ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1733				     drive->driver_req, drive->media);
1734
1735	if (!strstr("ide-cdrom", drive->driver_req))
1736		goto failed;
1737
1738	if (drive->media != ide_cdrom && drive->media != ide_optical)
1739		goto failed;
1740
1741	drive->debug_mask = debug_mask;
1742	drive->irq_handler = cdrom_newpc_intr;
1743
1744	info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1745	if (info == NULL) {
1746		printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1747				drive->name);
1748		goto failed;
1749	}
1750
1751	g = alloc_disk(1 << PARTN_BITS);
1752	if (!g)
1753		goto out_free_cd;
1754
1755	ide_init_disk(g, drive);
1756
1757	info->dev.parent = &drive->gendev;
1758	info->dev.release = ide_cd_release;
1759	dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
1760
1761	if (device_register(&info->dev))
1762		goto out_free_disk;
1763
1764	info->drive = drive;
1765	info->driver = &ide_cdrom_driver;
1766	info->disk = g;
1767
1768	g->private_data = &info->driver;
1769
1770	drive->driver_data = info;
1771
1772	g->minors = 1;
1773	g->driverfs_dev = &drive->gendev;
1774	g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1775	if (ide_cdrom_setup(drive)) {
1776		put_device(&info->dev);
1777		goto failed;
1778	}
1779
1780	ide_cd_read_toc(drive, &sense);
1781	g->fops = &idecd_ops;
1782	g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1783	add_disk(g);
1784	return 0;
1785
1786out_free_disk:
1787	put_disk(g);
1788out_free_cd:
1789	kfree(info);
1790failed:
1791	return -ENODEV;
1792}
1793
1794static void __exit ide_cdrom_exit(void)
1795{
1796	driver_unregister(&ide_cdrom_driver.gen_driver);
1797}
1798
1799static int __init ide_cdrom_init(void)
1800{
1801	printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1802	return driver_register(&ide_cdrom_driver.gen_driver);
1803}
1804
1805MODULE_ALIAS("ide:*m-cdrom*");
1806MODULE_ALIAS("ide-cd");
1807module_init(ide_cdrom_init);
1808module_exit(ide_cdrom_exit);
1809MODULE_LICENSE("GPL");
1810