2 linux/kernel/blk_drv/mcd.c - Mitsumi CDROM driver
4 Copyright (C) 1992 Martin Harriss
5 Portions Copyright (C) 2001 Red Hat
7 martin@bdsi.com (no longer valid - where are you now, Martin?)
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 0.1 First attempt - internal use only
26 0.2 Cleaned up delays and use of timer - alpha release
27 0.3 Audio support added
28 0.3.1 Changes for mitsumi CRMC LU005S march version
29 (stud11@cc4.kuleuven.ac.be)
30 0.3.2 bug fixes to the ioctls and merged with ALPHA0.99-pl12
31 (Jon Tombs <jon@robots.ox.ac.uk>)
32 0.3.3 Added more #defines and mcd_setup()
33 (Jon Tombs <jon@gtex02.us.es>)
35 October 1993 Bernd Huebner and Ruediger Helsch, Unifix Software GmbH,
36 Braunschweig, Germany: rework to speed up data read operation.
37 Also enabled definition of irq and address from bootstrap, using the
39 November 93 added code for FX001 S,D (single & double speed).
40 February 94 added code for broken M 5/6 series of 16-bit single speed.
44 Added support for loadable MODULEs, so mcd can now also be loaded by
45 insmod and removed by rmmod during runtime.
46 Werner Zimmermann (zimmerma@rz.fht-esslingen.de), Mar. 26, 95
49 I added code for FX001 D to drop from double speed to single speed
50 when encountering errors... this helps with some "problematic" CD's
51 that are supposedly "OUT OF TOLERANCE" (but are really shitty presses!)
52 severely scratched, or possibly slightly warped! I have noticed that
53 the Mitsumi 2x/4x drives are just less tolerant and the firmware is
54 not smart enough to drop speed, so let's just kludge it with software!
55 ****** THE 4X SPEED MITSUMI DRIVES HAVE THE SAME PROBLEM!!!!!! ******
56 Anyone want to "DONATE" one to me?! ;) I hear sometimes they are
58 ** HINT... HINT... TAKE NOTES MITSUMI This could save some hassles with
59 certain "large" CD's that have data on the outside edge in your
60 DOS DRIVERS .... Accuracy counts... speed is secondary ;)
61 17 June 95 Modifications By Andrew J. Kroll <ag784@freenet.buffalo.edu>
62 07 July 1995 Modifications by Andrew J. Kroll
64 Bjorn Ekwall <bj0rn@blox.se> added unregister_blkdev to mcd_init()
66 Michael K. Johnson <johnsonm@redhat.com> added retries on open
67 for slow drives which take a while to recognize that they contain
70 November 1997 -- ported to the Uniform CD-ROM driver by Erik Andersen.
71 March 1999 -- made io base and irq CONFIG_ options (Tigran Aivazian).
73 November 1999 -- Make kernel-parameter implementation work with 2.3.x
74 Removed init_module & cleanup_module in favor of
75 module_init & module_exit.
76 Torben Mathiasen <tmm@image.dk>
78 September 2001 - Reformatted and cleaned up the code
79 Alan Cox <alan@redhat.com>
82 #include <linux/module.h>
84 #include <linux/errno.h>
85 #include <linux/interrupt.h>
86 #include <linux/signal.h>
88 #include <linux/timer.h>
90 #include <linux/kernel.h>
91 #include <linux/devfs_fs_kernel.h>
92 #include <linux/cdrom.h>
93 #include <linux/ioport.h>
94 #include <linux/string.h>
95 #include <linux/delay.h>
96 #include <linux/init.h>
97 #include <linux/config.h>
99 /* #define REALLY_SLOW_IO */
100 #include <asm/system.h>
102 #include <asm/current.h>
103 #include <asm/uaccess.h>
104 #include <linux/blkdev.h>
108 /* I added A flag to drop to 1x speed if too many errors 0 = 1X ; 1 = 2X */
109 static int mcdDouble;
111 /* How many sectors to hold at 1x speed counter */
112 static int mcd1xhold;
114 /* Is the drive connected properly and responding?? */
115 static int mcdPresent;
116 static struct request_queue *mcd_queue;
118 #define MAJOR_NR MITSUMI_CDROM_MAJOR
119 #define QUEUE (mcd_queue)
120 #define CURRENT elv_next_request(mcd_queue)
122 #define QUICK_LOOP_DELAY udelay(45) /* use udelay */
123 #define QUICK_LOOP_COUNT 20
125 static int current_valid(void)
128 CURRENT->cmd == READ &&
129 CURRENT->sector != -1;
132 #define MFL_STATUSorDATA (MFL_STATUS | MFL_DATA)
133 #define MCD_BUF_SIZ 16
134 static volatile int mcd_transfer_is_active;
135 static char mcd_buf[2048 * MCD_BUF_SIZ]; /* buffer for block size conversion */
136 static volatile int mcd_buf_bn[MCD_BUF_SIZ], mcd_next_bn;
137 static volatile int mcd_buf_in, mcd_buf_out = -1;
138 static volatile int mcd_error;
139 static int mcd_open_count;
147 MCD_S_STOPPING /* 6 */
149 static volatile enum mcd_state_e mcd_state = MCD_S_IDLE;
150 static int mcd_mode = -1;
151 static int MCMD_DATA_READ = MCMD_PLAY_READ;
153 #define READ_TIMEOUT 3000
155 int mitsumi_bug_93_wait;
157 static short mcd_port = CONFIG_MCD_BASE; /* used as "mcd" by "insmod" */
158 static int mcd_irq = CONFIG_MCD_IRQ; /* must directly follow mcd_port */
160 static int McdTimeout, McdTries;
161 static DECLARE_WAIT_QUEUE_HEAD(mcd_waitq);
163 static struct mcd_DiskInfo DiskInfo;
164 static struct mcd_Toc Toc[MAX_TRACKS];
165 static struct mcd_Play_msf mcd_Play;
167 static int audioStatus;
168 static char mcdDiskChanged;
169 static char tocUpToDate;
170 static char mcdVersion;
172 static void mcd_transfer(void);
173 static void mcd_poll(unsigned long dummy);
174 static void mcd_invalidate_buffers(void);
175 static void hsg2msf(long hsg, struct msf *msf);
176 static void bin2bcd(unsigned char *p);
177 static int bcd2bin(unsigned char bcd);
178 static int mcdStatus(void);
179 static void sendMcdCmd(int cmd, struct mcd_Play_msf *params);
180 static int getMcdStatus(int timeout);
181 static int GetQChannelInfo(struct mcd_Toc *qp);
182 static int updateToc(void);
183 static int GetDiskInfo(void);
184 static int GetToc(void);
185 static int getValue(unsigned char *result);
186 static int mcd_open(struct cdrom_device_info *cdi, int purpose);
187 static void mcd_release(struct cdrom_device_info *cdi);
188 static int mcd_media_changed(struct cdrom_device_info *cdi, int disc_nr);
189 static int mcd_tray_move(struct cdrom_device_info *cdi, int position);
190 static DEFINE_SPINLOCK(mcd_spinlock);
191 static int mcd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
193 static int mcd_drive_status(struct cdrom_device_info *cdi, int slot_nr);
195 static struct timer_list mcd_timer = TIMER_INITIALIZER(NULL, 0, 0);
197 static struct cdrom_device_ops mcd_dops = {
199 .release = mcd_release,
200 .drive_status = mcd_drive_status,
201 .media_changed = mcd_media_changed,
202 .tray_move = mcd_tray_move,
203 .audio_ioctl = mcd_audio_ioctl,
204 .capability = CDC_OPEN_TRAY | CDC_MEDIA_CHANGED |
205 CDC_PLAY_AUDIO | CDC_DRIVE_STATUS,
208 static struct cdrom_device_info mcd_info = {
215 static int mcd_block_open(struct inode *inode, struct file *file)
217 return cdrom_open(&mcd_info, inode, file);
220 static int mcd_block_release(struct inode *inode, struct file *file)
222 return cdrom_release(&mcd_info, file);
225 static int mcd_block_ioctl(struct inode *inode, struct file *file,
226 unsigned cmd, unsigned long arg)
228 return cdrom_ioctl(file, &mcd_info, inode, cmd, arg);
231 static int mcd_block_media_changed(struct gendisk *disk)
233 return cdrom_media_changed(&mcd_info);
236 static struct block_device_operations mcd_bdops =
238 .owner = THIS_MODULE,
239 .open = mcd_block_open,
240 .release = mcd_block_release,
241 .ioctl = mcd_block_ioctl,
242 .media_changed = mcd_block_media_changed,
245 static struct gendisk *mcd_gendisk;
247 static int __init mcd_setup(char *str)
251 (void) get_options(str, ARRAY_SIZE(ints), ints);
258 mitsumi_bug_93_wait = ints[3];
263 __setup("mcd=", mcd_setup);
266 static int __init param_set_mcd(const char *val, struct kernel_param *kp)
271 module_param_call(mcd, param_set_mcd, NULL, NULL, 0);
274 static int mcd_media_changed(struct cdrom_device_info *cdi, int disc_nr)
281 * Do a 'get status' command and get the result. Only use from the top half
282 * because it calls 'getMcdStatus' which sleeps.
285 static int statusCmd(void)
289 for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
290 /* send get-status cmd */
291 outb(MCMD_GET_STATUS, MCDPORT(0));
293 st = getMcdStatus(MCD_STATUS_DELAY);
303 * Send a 'Play' command and get the status. Use only from the top half.
306 static int mcdPlay(struct mcd_Play_msf *arg)
310 for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
311 sendMcdCmd(MCMD_PLAY_READ, arg);
312 st = getMcdStatus(2 * MCD_STATUS_DELAY);
321 static int mcd_tray_move(struct cdrom_device_info *cdi, int position)
326 /* all drives can at least stop! */
327 if (audioStatus == CDROM_AUDIO_PLAY) {
328 outb(MCMD_STOP, MCDPORT(0));
329 i = getMcdStatus(MCD_STATUS_DELAY);
332 audioStatus = CDROM_AUDIO_NO_STATUS;
334 outb(MCMD_EJECT, MCDPORT(0));
336 * the status (i) shows failure on all but the FX drives.
337 * But nothing we can do about that in software!
338 * So just read the status and forget it. - Jon.
340 i = getMcdStatus(MCD_STATUS_DELAY);
346 long msf2hsg(struct msf *mp)
348 return bcd2bin(mp->frame) + bcd2bin(mp->sec) * 75 + bcd2bin(mp->min) * 4500 - 150;
352 int mcd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
356 struct mcd_Toc qInfo;
358 struct cdrom_tochdr *tocHdr;
359 struct cdrom_msf *msf;
360 struct cdrom_subchnl *subchnl;
361 struct cdrom_tocentry *entry;
362 struct mcd_Toc *tocPtr;
363 struct cdrom_volctrl *volctrl;
372 return i; /* error reading TOC */
376 case CDROMSTART: /* Spin up the drive */
377 /* Don't think we can do this. Even if we could,
378 * I think the drive times out and stops after a while
379 * anyway. For now, ignore it.
384 case CDROMSTOP: /* Spin down the drive */
385 outb(MCMD_STOP, MCDPORT(0));
386 i = getMcdStatus(MCD_STATUS_DELAY);
388 /* should we do anything if it fails? */
390 audioStatus = CDROM_AUDIO_NO_STATUS;
393 case CDROMPAUSE: /* Pause the drive */
394 if (audioStatus != CDROM_AUDIO_PLAY)
397 outb(MCMD_STOP, MCDPORT(0));
398 i = getMcdStatus(MCD_STATUS_DELAY);
400 if (GetQChannelInfo(&qInfo) < 0) {
401 /* didn't get q channel info */
403 audioStatus = CDROM_AUDIO_NO_STATUS;
407 mcd_Play.start = qInfo.diskTime; /* remember restart point */
409 audioStatus = CDROM_AUDIO_PAUSED;
412 case CDROMRESUME: /* Play it again, Sam */
413 if (audioStatus != CDROM_AUDIO_PAUSED)
416 /* restart the drive at the saved position. */
418 i = mcdPlay(&mcd_Play);
420 audioStatus = CDROM_AUDIO_ERROR;
424 audioStatus = CDROM_AUDIO_PLAY;
427 case CDROMPLAYTRKIND: /* Play a track. This currently ignores index. */
429 ti = (struct cdrom_ti *) arg;
431 if (ti->cdti_trk0 < DiskInfo.first
432 || ti->cdti_trk0 > DiskInfo.last
433 || ti->cdti_trk1 < ti->cdti_trk0) {
437 if (ti->cdti_trk1 > DiskInfo.last)
438 ti->cdti_trk1 = DiskInfo.last;
440 mcd_Play.start = Toc[ti->cdti_trk0].diskTime;
441 mcd_Play.end = Toc[ti->cdti_trk1 + 1].diskTime;
444 printk("play: %02x:%02x.%02x to %02x:%02x.%02x\n",
445 mcd_Play.start.min, mcd_Play.start.sec,
446 mcd_Play.start.frame, mcd_Play.end.min,
447 mcd_Play.end.sec, mcd_Play.end.frame);
450 i = mcdPlay(&mcd_Play);
452 audioStatus = CDROM_AUDIO_ERROR;
456 audioStatus = CDROM_AUDIO_PLAY;
459 case CDROMPLAYMSF: /* Play starting at the given MSF address. */
461 if (audioStatus == CDROM_AUDIO_PLAY) {
462 outb(MCMD_STOP, MCDPORT(0));
463 i = getMcdStatus(MCD_STATUS_DELAY);
464 audioStatus = CDROM_AUDIO_NO_STATUS;
467 msf = (struct cdrom_msf *) arg;
471 bin2bcd(&msf->cdmsf_min0);
472 bin2bcd(&msf->cdmsf_sec0);
473 bin2bcd(&msf->cdmsf_frame0);
474 bin2bcd(&msf->cdmsf_min1);
475 bin2bcd(&msf->cdmsf_sec1);
476 bin2bcd(&msf->cdmsf_frame1);
478 mcd_Play.start.min = msf->cdmsf_min0;
479 mcd_Play.start.sec = msf->cdmsf_sec0;
480 mcd_Play.start.frame = msf->cdmsf_frame0;
481 mcd_Play.end.min = msf->cdmsf_min1;
482 mcd_Play.end.sec = msf->cdmsf_sec1;
483 mcd_Play.end.frame = msf->cdmsf_frame1;
486 printk("play: %02x:%02x.%02x to %02x:%02x.%02x\n",
487 mcd_Play.start.min, mcd_Play.start.sec,
488 mcd_Play.start.frame, mcd_Play.end.min,
489 mcd_Play.end.sec, mcd_Play.end.frame);
492 i = mcdPlay(&mcd_Play);
494 audioStatus = CDROM_AUDIO_ERROR;
498 audioStatus = CDROM_AUDIO_PLAY;
501 case CDROMREADTOCHDR: /* Read the table of contents header */
502 tocHdr = (struct cdrom_tochdr *) arg;
503 tocHdr->cdth_trk0 = DiskInfo.first;
504 tocHdr->cdth_trk1 = DiskInfo.last;
507 case CDROMREADTOCENTRY: /* Read an entry in the table of contents */
508 entry = (struct cdrom_tocentry *) arg;
509 if (entry->cdte_track == CDROM_LEADOUT)
510 tocPtr = &Toc[DiskInfo.last - DiskInfo.first + 1];
512 else if (entry->cdte_track > DiskInfo.last
513 || entry->cdte_track < DiskInfo.first)
517 tocPtr = &Toc[entry->cdte_track];
519 entry->cdte_adr = tocPtr->ctrl_addr;
520 entry->cdte_ctrl = tocPtr->ctrl_addr >> 4;
522 if (entry->cdte_format == CDROM_LBA)
523 entry->cdte_addr.lba = msf2hsg(&tocPtr->diskTime);
525 else if (entry->cdte_format == CDROM_MSF) {
526 entry->cdte_addr.msf.minute =
527 bcd2bin(tocPtr->diskTime.min);
528 entry->cdte_addr.msf.second =
529 bcd2bin(tocPtr->diskTime.sec);
530 entry->cdte_addr.msf.frame =
531 bcd2bin(tocPtr->diskTime.frame);
539 case CDROMSUBCHNL: /* Get subchannel info */
541 subchnl = (struct cdrom_subchnl *) arg;
542 if (GetQChannelInfo(&qInfo) < 0)
545 subchnl->cdsc_audiostatus = audioStatus;
546 subchnl->cdsc_adr = qInfo.ctrl_addr;
547 subchnl->cdsc_ctrl = qInfo.ctrl_addr >> 4;
548 subchnl->cdsc_trk = bcd2bin(qInfo.track);
549 subchnl->cdsc_ind = bcd2bin(qInfo.pointIndex);
550 subchnl->cdsc_absaddr.msf.minute = bcd2bin(qInfo.diskTime.min);
551 subchnl->cdsc_absaddr.msf.second = bcd2bin(qInfo.diskTime.sec);
552 subchnl->cdsc_absaddr.msf.frame = bcd2bin(qInfo.diskTime.frame);
553 subchnl->cdsc_reladdr.msf.minute = bcd2bin(qInfo.trackTime.min);
554 subchnl->cdsc_reladdr.msf.second = bcd2bin(qInfo.trackTime.sec);
555 subchnl->cdsc_reladdr.msf.frame = bcd2bin(qInfo.trackTime.frame);
558 case CDROMVOLCTRL: /* Volume control */
559 volctrl = (struct cdrom_volctrl *) arg;
560 outb(MCMD_SET_VOLUME, MCDPORT(0));
561 outb(volctrl->channel0, MCDPORT(0));
562 outb(255, MCDPORT(0));
563 outb(volctrl->channel1, MCDPORT(0));
564 outb(255, MCDPORT(0));
566 i = getMcdStatus(MCD_STATUS_DELAY);
587 * Take care of the different block sizes between cdrom and Linux.
588 * When Linux gets variable block sizes this will probably go away.
591 static void mcd_transfer(void)
593 if (!current_valid())
596 while (CURRENT->nr_sectors) {
597 int bn = CURRENT->sector / 4;
599 for (i = 0; i < MCD_BUF_SIZ && mcd_buf_bn[i] != bn; ++i)
601 if (i < MCD_BUF_SIZ) {
602 int offs =(i * 4 + (CURRENT->sector & 3)) * 512;
603 int nr_sectors = 4 - (CURRENT->sector & 3);
604 if (mcd_buf_out != i) {
606 if (mcd_buf_bn[i] != bn) {
611 if (nr_sectors > CURRENT->nr_sectors)
612 nr_sectors = CURRENT->nr_sectors;
613 memcpy(CURRENT->buffer, mcd_buf + offs, nr_sectors * 512);
614 CURRENT->nr_sectors -= nr_sectors;
615 CURRENT->sector += nr_sectors;
616 CURRENT->buffer += nr_sectors * 512;
626 * We only seem to get interrupts after an error.
627 * Just take the interrupt and clear out the status reg.
630 static irqreturn_t mcd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
634 st = inb(MCDPORT(1)) & 0xFF;
635 test1(printk("<int1-%02X>", st));
636 if (!(st & MFL_STATUS)) {
637 st = inb(MCDPORT(0)) & 0xFF;
638 test1(printk("<int0-%02X>", st));
639 if ((st & 0xFF) != 0xFF)
640 mcd_error = st ? st & 0xFF : -1;
646 static void do_mcd_request(request_queue_t * q)
648 test2(printk(" do_mcd_request(%ld+%ld)\n", CURRENT->sector,
649 CURRENT->nr_sectors));
651 mcd_transfer_is_active = 1;
652 while (current_valid()) {
654 if (CURRENT->nr_sectors == 0) {
655 end_request(CURRENT, 1);
657 mcd_buf_out = -1; /* Want to read a block not in buffer */
658 if (mcd_state == MCD_S_IDLE) {
660 if (updateToc() < 0) {
661 while (current_valid())
662 end_request(CURRENT, 0);
666 mcd_state = MCD_S_START;
668 mcd_timer.function = mcd_poll;
669 mod_timer(&mcd_timer, jiffies + 1);
674 mcd_transfer_is_active = 0;
675 test2(printk(" do_mcd_request ends\n"));
680 static void mcd_poll(unsigned long dummy)
686 if (mcd_error & 0xA5) {
687 printk(KERN_ERR "mcd: I/O error 0x%02x", mcd_error);
688 if (mcd_error & 0x80)
689 printk(" (Door open)");
690 if (mcd_error & 0x20)
691 printk(" (Disk changed)");
692 if (mcd_error & 0x04) {
693 printk(" (Read error)"); /* Bitch about the problem. */
695 /* Time to get fancy! If at 2x speed and 1 error, drop to 1x speed! */
696 /* Interesting how it STAYS at MCD_RETRY_ATTEMPTS on first error! */
697 /* But I find that rather HANDY!!! */
698 /* Neat! it REALLY WORKS on those LOW QUALITY CD's!!! Smile! :) */
701 /* Slap the CD down to single speed! */
703 && McdTries == MCD_RETRY_ATTEMPTS
704 && MCMD_DATA_READ == MCMD_2X_READ) {
705 MCMD_DATA_READ = MCMD_PLAY_READ; /* Uhhh, Ummmm, muhuh-huh! */
706 mcd1xhold = SINGLE_HOLD_SECTORS; /* Hey Beavis! */
707 printk(" Speed now 1x"); /* Pull my finger! */
711 mcd_invalidate_buffers();
712 #ifdef WARN_IF_READ_FAILURE
713 if (McdTries == MCD_RETRY_ATTEMPTS)
714 printk(KERN_ERR "mcd: read of block %d failed\n",
718 /* Nuts! This cd is ready for recycling! */
719 /* When WAS the last time YOU cleaned it CORRECTLY?! */
720 printk(KERN_ERR "mcd: read of block %d failed, giving up\n",
722 if (mcd_transfer_is_active) {
727 end_request(CURRENT, 0);
728 McdTries = MCD_RETRY_ATTEMPTS;
732 mcd_state = MCD_S_STOP;
734 /* Switch back to Double speed if enough GOOD sectors were read! */
736 /* Are we a double speed with a crappy CD?! */
737 if (mcdDouble == 1 && McdTries == MCD_RETRY_ATTEMPTS
738 && MCMD_DATA_READ == MCMD_PLAY_READ) {
739 /* We ARE a double speed and we ARE bitching! */
740 if (mcd1xhold == 0) { /* Okay, Like are we STILL at single speed? *//* We need to switch back to double speed now... */
741 MCMD_DATA_READ = MCMD_2X_READ; /* Uhhh... BACK You GO! */
742 printk(KERN_INFO "mcd: Switching back to 2X speed!\n"); /* Tell 'em! */
744 mcd1xhold--; /* No?! Count down the good reads some more... */
745 /* and try, try again! */
751 test3(printk("MCD_S_IDLE\n"));
755 test3(printk("MCD_S_START\n"));
756 outb(MCMD_GET_STATUS, MCDPORT(0));
757 mcd_state = mcd_mode == 1 ? MCD_S_READ : MCD_S_MODE;
762 test3(printk("MCD_S_MODE\n"));
763 if ((st = mcdStatus()) != -1) {
764 if (st & MST_DSK_CHG) {
767 mcd_invalidate_buffers();
770 set_mode_immediately:
771 if ((st & MST_DOOR_OPEN) || !(st & MST_READY)) {
774 if (mcd_transfer_is_active) {
775 mcd_state = MCD_S_START;
779 printk((st & MST_DOOR_OPEN) ?
781 "mcd: disk removed\n");
782 mcd_state = MCD_S_IDLE;
783 while (current_valid())
784 end_request(CURRENT, 0);
787 outb(MCMD_SET_MODE, MCDPORT(0));
790 mcd_state = MCD_S_READ;
796 test3(printk("MCD_S_READ\n"));
797 if ((st = mcdStatus()) != -1) {
798 if (st & MST_DSK_CHG) {
801 mcd_invalidate_buffers();
805 if ((st & MST_DOOR_OPEN) || !(st & MST_READY)) {
808 if (mcd_transfer_is_active) {
809 mcd_state = MCD_S_START;
813 printk((st & MST_DOOR_OPEN) ?
815 "mcd: disk removed\n");
816 mcd_state = MCD_S_IDLE;
817 while (current_valid())
818 end_request(CURRENT, 0);
822 if (current_valid()) {
823 struct mcd_Play_msf msf;
824 mcd_next_bn = CURRENT->sector / 4;
825 hsg2msf(mcd_next_bn, &msf.start);
829 sendMcdCmd(MCMD_DATA_READ, &msf);
830 mcd_state = MCD_S_DATA;
831 McdTimeout = READ_TIMEOUT;
833 mcd_state = MCD_S_STOP;
841 test3(printk("MCD_S_DATA\n"));
842 st = inb(MCDPORT(1)) & (MFL_STATUSorDATA);
844 test5(printk("Status %02x\n", st))
847 #ifdef WARN_IF_READ_FAILURE
849 printk(KERN_WARNING "mcd: read of block %d failed\n",
853 printk(KERN_ERR "mcd: read of block %d failed, giving up\n", mcd_next_bn);
854 if (mcd_transfer_is_active) {
859 end_request(CURRENT, 0);
862 mcd_state = MCD_S_START;
863 McdTimeout = READ_TIMEOUT;
866 case MFL_STATUSorDATA:
871 if (!current_valid() && mcd_buf_in == mcd_buf_out) {
872 mcd_state = MCD_S_STOP;
875 mcd_buf_bn[mcd_buf_in] = -1;
876 insb(MCDPORT(0), mcd_buf + 2048 * mcd_buf_in,
878 mcd_buf_bn[mcd_buf_in] = mcd_next_bn++;
879 if (mcd_buf_out == -1)
880 mcd_buf_out = mcd_buf_in;
881 mcd_buf_in = mcd_buf_in + 1 == MCD_BUF_SIZ ? 0 : mcd_buf_in + 1;
882 if (!mcd_transfer_is_active) {
883 while (current_valid()) {
885 if (CURRENT->nr_sectors == 0)
886 end_request(CURRENT, 1);
893 && (CURRENT->sector / 4 < mcd_next_bn ||
894 CURRENT->sector / 4 > mcd_next_bn + 16)) {
895 mcd_state = MCD_S_STOP;
898 McdTimeout = READ_TIMEOUT;
900 int count = QUICK_LOOP_COUNT;
903 if ((st = (inb(MCDPORT(1))) & (MFL_STATUSorDATA)) != (MFL_STATUSorDATA)) {
904 test4(printk(" %d ", QUICK_LOOP_COUNT - count));
905 goto data_immediately;
908 test4(printk("ended "));
915 test3(printk("MCD_S_STOP\n"));
916 if (!mitsumi_bug_93_wait)
917 goto do_not_work_around_mitsumi_bug_93_1;
919 McdTimeout = mitsumi_bug_93_wait;
920 mcd_state = 9 + 3 + 1;
927 do_not_work_around_mitsumi_bug_93_1:
928 outb(MCMD_STOP, MCDPORT(0));
929 if ((inb(MCDPORT(1)) & MFL_STATUSorDATA) == MFL_STATUS) {
933 } while ((inb(MCDPORT(1)) & MFL_STATUSorDATA) == MFL_STATUS && --i);
934 outb(MCMD_STOP, MCDPORT(0));
935 if ((inb(MCDPORT(1)) & MFL_STATUSorDATA) == MFL_STATUS) {
939 } while ((inb(MCDPORT(1)) & MFL_STATUSorDATA) == MFL_STATUS && --i);
940 outb(MCMD_STOP, MCDPORT(0));
944 mcd_state = MCD_S_STOPPING;
949 test3(printk("MCD_S_STOPPING\n"));
950 if ((st = mcdStatus()) == -1 && McdTimeout)
953 if ((st != -1) && (st & MST_DSK_CHG)) {
956 mcd_invalidate_buffers();
958 if (!mitsumi_bug_93_wait)
959 goto do_not_work_around_mitsumi_bug_93_2;
961 McdTimeout = mitsumi_bug_93_wait;
962 mcd_state = 9 + 3 + 2;
970 do_not_work_around_mitsumi_bug_93_2:
971 test3(printk("CURRENT_VALID %d mcd_mode %d\n", current_valid(),
973 if (current_valid()) {
976 goto read_immediately;
978 goto set_mode_immediately;
980 mcd_state = MCD_S_START;
984 mcd_state = MCD_S_IDLE;
989 printk(KERN_ERR "mcd: invalid state %d\n", mcd_state);
994 printk(KERN_WARNING "mcd: timeout in state %d\n", mcd_state);
995 mcd_state = MCD_S_STOP;
997 mcd_timer.function = mcd_poll;
998 mod_timer(&mcd_timer, jiffies + 1);
1003 static void mcd_invalidate_buffers(void)
1006 for (i = 0; i < MCD_BUF_SIZ; ++i)
1012 * Open the device special file. Check that a disk is in.
1014 static int mcd_open(struct cdrom_device_info *cdi, int purpose)
1017 if (mcdPresent == 0)
1018 return -ENXIO; /* no hardware */
1020 if (mcd_open_count || mcd_state != MCD_S_IDLE)
1023 mcd_invalidate_buffers();
1025 st = statusCmd(); /* check drive status */
1027 goto err_out; /* drive doesn't respond */
1028 if ((st & MST_READY) == 0) /* no disk? wait a sec... */
1031 } while (((st & MST_READY) == 0) && count++ < MCD_RETRY_ATTEMPTS);
1033 if (updateToc() < 0)
1046 * On close, we flush all mcd blocks from the buffer cache.
1048 static void mcd_release(struct cdrom_device_info *cdi)
1050 if (!--mcd_open_count) {
1051 mcd_invalidate_buffers();
1056 * Test for presence of drive and initialize it. Called at boot time.
1059 int __init mcd_init(void)
1061 struct gendisk *disk = alloc_disk(1);
1063 unsigned char result[3];
1067 printk(KERN_INFO "mcd: can't allocated disk.\n");
1070 if (mcd_port <= 0 || mcd_irq <= 0) {
1071 printk(KERN_INFO "mcd: not probing.\n");
1075 if (register_blkdev(MAJOR_NR, "mcd")) {
1079 if (!request_region(mcd_port, 4, "mcd")) {
1080 printk(KERN_ERR "mcd: Initialization failed, I/O port (%X) already in use\n", mcd_port);
1084 mcd_queue = blk_init_queue(do_mcd_request, &mcd_spinlock);
1088 /* check for card */
1090 outb(0, MCDPORT(1)); /* send reset */
1091 for (count = 0; count < 2000000; count++)
1092 (void) inb(MCDPORT(1)); /* delay a bit */
1094 outb(0x40, MCDPORT(0)); /* send get-stat cmd */
1095 for (count = 0; count < 2000000; count++)
1096 if (!(inb(MCDPORT(1)) & MFL_STATUS))
1099 if (count >= 2000000) {
1100 printk(KERN_INFO "mcd: initialisation failed - No mcd device at 0x%x irq %d\n",
1104 count = inb(MCDPORT(0)); /* pick up the status */
1106 outb(MCMD_GET_VERSION, MCDPORT(0));
1107 for (count = 0; count < 3; count++)
1108 if (getValue(result + count)) {
1109 printk(KERN_ERR "mcd: mitsumi get version failed at 0x%x\n",
1114 if (result[0] == result[1] && result[1] == result[2])
1117 mcdVersion = result[2];
1119 if (mcdVersion >= 4)
1120 outb(4, MCDPORT(2)); /* magic happens */
1122 /* don't get the IRQ until we know for sure the drive is there */
1124 if (request_irq(mcd_irq, mcd_interrupt, SA_INTERRUPT, "Mitsumi CD", NULL)) {
1125 printk(KERN_ERR "mcd: Unable to get IRQ%d for Mitsumi CD-ROM\n", mcd_irq);
1129 if (result[1] == 'D') {
1130 MCMD_DATA_READ = MCMD_2X_READ;
1131 /* Added flag to drop to 1x speed if too many errors */
1135 sprintf(msg, " mcd: Mitsumi %s Speed CD-ROM at port=0x%x,"
1136 " irq=%d\n", mcd_info.speed == 1 ? "Single" : "Double",
1139 outb(MCMD_CONFIG_DRIVE, MCDPORT(0));
1140 outb(0x02, MCDPORT(0));
1141 outb(0x00, MCDPORT(0));
1144 outb(MCMD_CONFIG_DRIVE, MCDPORT(0));
1145 outb(0x10, MCDPORT(0));
1146 outb(0x04, MCDPORT(0));
1149 mcd_invalidate_buffers();
1152 disk->major = MAJOR_NR;
1153 disk->first_minor = 0;
1154 sprintf(disk->disk_name, "mcd");
1155 disk->fops = &mcd_bdops;
1156 disk->flags = GENHD_FL_CD;
1159 if (register_cdrom(&mcd_info) != 0) {
1160 printk(KERN_ERR "mcd: Unable to register Mitsumi CD-ROM.\n");
1163 disk->queue = mcd_queue;
1169 free_irq(mcd_irq, NULL);
1171 release_region(mcd_port, 4);
1173 blk_cleanup_queue(mcd_queue);
1175 unregister_blkdev(MAJOR_NR, "mcd");
1181 static void hsg2msf(long hsg, struct msf *msf)
1184 msf->min = hsg / 4500;
1186 msf->sec = hsg / 75;
1187 msf->frame = hsg % 75;
1189 bin2bcd(&msf->min); /* convert to BCD */
1191 bin2bcd(&msf->frame);
1195 static void bin2bcd(unsigned char *p)
1204 static int bcd2bin(unsigned char bcd)
1206 return (bcd >> 4) * 10 + (bcd & 0xF);
1211 * See if a status is ready from the drive and return it
1215 static int mcdStatus(void)
1220 st = inb(MCDPORT(1)) & MFL_STATUS;
1222 i = inb(MCDPORT(0)) & 0xFF;
1230 * Send a play or read command to the drive
1233 static void sendMcdCmd(int cmd, struct mcd_Play_msf *params)
1235 outb(cmd, MCDPORT(0));
1236 outb(params->start.min, MCDPORT(0));
1237 outb(params->start.sec, MCDPORT(0));
1238 outb(params->start.frame, MCDPORT(0));
1239 outb(params->end.min, MCDPORT(0));
1240 outb(params->end.sec, MCDPORT(0));
1241 outb(params->end.frame, MCDPORT(0));
1246 * Timer interrupt routine to test for status ready from the drive.
1247 * (see the next routine)
1250 static void mcdStatTimer(unsigned long dummy)
1252 if (!(inb(MCDPORT(1)) & MFL_STATUS)) {
1253 wake_up(&mcd_waitq);
1258 if (McdTimeout <= 0) {
1259 wake_up(&mcd_waitq);
1262 mcd_timer.function = mcdStatTimer;
1263 mod_timer(&mcd_timer, jiffies + 1);
1268 * Wait for a status to be returned from the drive. The actual test
1269 * (see routine above) is done by the timer interrupt to avoid
1270 * excessive rescheduling.
1273 static int getMcdStatus(int timeout)
1277 McdTimeout = timeout;
1278 mcd_timer.function = mcdStatTimer;
1279 mod_timer(&mcd_timer, jiffies + 1);
1280 sleep_on(&mcd_waitq);
1281 if (McdTimeout <= 0)
1284 st = inb(MCDPORT(0)) & 0xFF;
1288 if ((st & MST_BUSY) == 0 && audioStatus == CDROM_AUDIO_PLAY)
1289 /* XXX might be an error? look at q-channel? */
1290 audioStatus = CDROM_AUDIO_COMPLETED;
1292 if (st & MST_DSK_CHG) {
1295 audioStatus = CDROM_AUDIO_NO_STATUS;
1302 /* gives current state of the drive This function is quite unreliable,
1303 and should probably be rewritten by someone, eventually... */
1305 int mcd_drive_status(struct cdrom_device_info *cdi, int slot_nr)
1309 st = statusCmd(); /* check drive status */
1311 return -EIO; /* drive doesn't respond */
1312 if ((st & MST_READY))
1314 if ((st & MST_DOOR_OPEN))
1315 return CDS_TRAY_OPEN;
1316 if ((st & MST_DSK_CHG))
1318 if ((st & MST_BUSY))
1319 return CDS_DRIVE_NOT_READY;
1325 * Read a value from the drive.
1328 static int getValue(unsigned char *result)
1333 for (count = 0; count < 2000; count++)
1334 if (!(inb(MCDPORT(1)) & MFL_STATUS))
1337 if (count >= 2000) {
1338 printk("mcd: getValue timeout\n");
1342 s = inb(MCDPORT(0)) & 0xFF;
1343 *result = (unsigned char) s;
1348 * Read the current Q-channel info. Also used for reading the
1349 * table of contents.
1352 int GetQChannelInfo(struct mcd_Toc *qp)
1354 unsigned char notUsed;
1357 for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
1358 outb(MCMD_GET_Q_CHANNEL, MCDPORT(0));
1359 if (getMcdStatus(MCD_STATUS_DELAY) != -1)
1363 if (retry >= MCD_RETRY_ATTEMPTS)
1366 if (getValue(&qp->ctrl_addr) < 0)
1368 if (getValue(&qp->track) < 0)
1370 if (getValue(&qp->pointIndex) < 0)
1372 if (getValue(&qp->trackTime.min) < 0)
1374 if (getValue(&qp->trackTime.sec) < 0)
1376 if (getValue(&qp->trackTime.frame) < 0)
1378 if (getValue(¬Used) < 0)
1380 if (getValue(&qp->diskTime.min) < 0)
1382 if (getValue(&qp->diskTime.sec) < 0)
1384 if (getValue(&qp->diskTime.frame) < 0)
1391 * Read the table of contents (TOC) and TOC header if necessary
1394 static int updateToc(void)
1399 if (GetDiskInfo() < 0)
1410 * Read the table of contents header
1413 static int GetDiskInfo(void)
1417 for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
1418 outb(MCMD_GET_DISK_INFO, MCDPORT(0));
1419 if (getMcdStatus(MCD_STATUS_DELAY) != -1)
1423 if (retry >= MCD_RETRY_ATTEMPTS)
1426 if (getValue(&DiskInfo.first) < 0)
1428 if (getValue(&DiskInfo.last) < 0)
1431 DiskInfo.first = bcd2bin(DiskInfo.first);
1432 DiskInfo.last = bcd2bin(DiskInfo.last);
1436 ("Disk Info: first %d last %d length %02x:%02x.%02x first %02x:%02x.%02x\n",
1437 DiskInfo.first, DiskInfo.last, DiskInfo.diskLength.min,
1438 DiskInfo.diskLength.sec, DiskInfo.diskLength.frame,
1439 DiskInfo.firstTrack.min, DiskInfo.firstTrack.sec,
1440 DiskInfo.firstTrack.frame);
1443 if (getValue(&DiskInfo.diskLength.min) < 0)
1445 if (getValue(&DiskInfo.diskLength.sec) < 0)
1447 if (getValue(&DiskInfo.diskLength.frame) < 0)
1449 if (getValue(&DiskInfo.firstTrack.min) < 0)
1451 if (getValue(&DiskInfo.firstTrack.sec) < 0)
1453 if (getValue(&DiskInfo.firstTrack.frame) < 0)
1460 * Read the table of contents (TOC)
1463 static int GetToc(void)
1468 struct mcd_Toc qInfo;
1470 for (i = 0; i < MAX_TRACKS; i++)
1471 Toc[i].pointIndex = 0;
1473 i = DiskInfo.last + 3;
1475 for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
1476 outb(MCMD_STOP, MCDPORT(0));
1477 if (getMcdStatus(MCD_STATUS_DELAY) != -1)
1481 if (retry >= MCD_RETRY_ATTEMPTS)
1484 for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
1485 outb(MCMD_SET_MODE, MCDPORT(0));
1486 outb(0x05, MCDPORT(0)); /* mode: toc */
1488 if (getMcdStatus(MCD_STATUS_DELAY) != -1)
1492 if (retry >= MCD_RETRY_ATTEMPTS)
1495 for (limit = 300; limit > 0; limit--) {
1496 if (GetQChannelInfo(&qInfo) < 0)
1499 px = bcd2bin(qInfo.pointIndex);
1500 if (px > 0 && px < MAX_TRACKS && qInfo.track == 0)
1501 if (Toc[px].pointIndex == 0) {
1510 Toc[DiskInfo.last + 1].diskTime = DiskInfo.diskLength;
1512 for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
1513 outb(MCMD_SET_MODE, MCDPORT(0));
1514 outb(0x01, MCDPORT(0));
1516 if (getMcdStatus(MCD_STATUS_DELAY) != -1)
1521 for (i = 1; i <= DiskInfo.last; i++)
1523 ("i = %2d ctl-adr = %02X track %2d px %02X %02X:%02X.%02X %02X:%02X.%02X\n",
1524 i, Toc[i].ctrl_addr, Toc[i].track, Toc[i].pointIndex,
1525 Toc[i].trackTime.min, Toc[i].trackTime.sec,
1526 Toc[i].trackTime.frame, Toc[i].diskTime.min,
1527 Toc[i].diskTime.sec, Toc[i].diskTime.frame);
1528 for (i = 100; i < 103; i++)
1530 ("i = %2d ctl-adr = %02X track %2d px %02X %02X:%02X.%02X %02X:%02X.%02X\n",
1531 i, Toc[i].ctrl_addr, Toc[i].track, Toc[i].pointIndex,
1532 Toc[i].trackTime.min, Toc[i].trackTime.sec,
1533 Toc[i].trackTime.frame, Toc[i].diskTime.min,
1534 Toc[i].diskTime.sec, Toc[i].diskTime.frame);
1537 return limit > 0 ? 0 : -1;
1540 void __exit mcd_exit(void)
1542 del_gendisk(mcd_gendisk);
1543 put_disk(mcd_gendisk);
1544 if (unregister_cdrom(&mcd_info)) {
1545 printk(KERN_WARNING "Can't unregister cdrom mcd\n");
1548 free_irq(mcd_irq, NULL);
1549 release_region(mcd_port, 4);
1550 if (unregister_blkdev(MAJOR_NR, "mcd")) {
1551 printk(KERN_WARNING "Can't unregister major mcd\n");
1554 blk_cleanup_queue(mcd_queue);
1555 del_timer_sync(&mcd_timer);
1559 module_init(mcd_init);
1561 module_exit(mcd_exit);
1563 MODULE_AUTHOR("Martin Harriss");
1564 MODULE_LICENSE("GPL");
1565 MODULE_ALIAS_BLOCKDEV_MAJOR(MITSUMI_CDROM_MAJOR);