[PATCH] devfs: Remove the devfs_fs_kernel.h file from the tree
[linux-2.6.git] / drivers / cdrom / sjcd.c
1 /* -- sjcd.c
2  *
3  *   Sanyo CD-ROM device driver implementation, Version 1.6
4  *   Copyright (C) 1995  Vadim V. Model
5  *
6  *   model@cecmow.enet.dec.com
7  *   vadim@rbrf.ru
8  *   vadim@ipsun.ras.ru
9  *
10  *
11  *  This driver is based on pre-works by Eberhard Moenkeberg (emoenke@gwdg.de);
12  *  it was developed under use of mcd.c from Martin Harriss, with help of
13  *  Eric van der Maarel (H.T.M.v.d.Maarel@marin.nl).
14  *
15  *  It is planned to include these routines into sbpcd.c later - to make
16  *  a "mixed use" on one cable possible for all kinds of drives which use
17  *  the SoundBlaster/Panasonic style CDROM interface. But today, the
18  *  ability to install directly from CDROM is more important than flexibility.
19  *
20  *  This program is free software; you can redistribute it and/or modify
21  *  it under the terms of the GNU General Public License as published by
22  *  the Free Software Foundation; either version 2 of the License, or
23  *  (at your option) any later version.
24  *
25  *  This program is distributed in the hope that it will be useful,
26  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
27  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
28  *  GNU General Public License for more details.
29  *
30  *  You should have received a copy of the GNU General Public License
31  *  along with this program; if not, write to the Free Software
32  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
33  *
34  *  History:
35  *  1.1 First public release with kernel version 1.3.7.
36  *      Written by Vadim Model.
37  *  1.2 Added detection and configuration of cdrom interface
38  *      on ISP16 soundcard.
39  *      Allow for command line options: sjcd=<io_base>,<irq>,<dma>
40  *  1.3 Some minor changes to README.sjcd.
41  *  1.4 MSS Sound support!! Listen to a CD through the speakers.
42  *  1.5 Module support and bugfixes.
43  *      Tray locking.
44  *  1.6 Removed ISP16 code from this driver.
45  *      Allow only to set io base address on command line: sjcd=<io_base>
46  *      Changes to Documentation/cdrom/sjcd
47  *      Added cleanup after any error in the initialisation.
48  *  1.7 Added code to set the sector size tables to prevent the bug present in 
49  *      the previous version of this driver.  Coded added by Anthony Barbachan 
50  *      from bugfix tip originally suggested by Alan Cox.
51  *
52  *  November 1999 -- Make kernel-parameter implementation work with 2.3.x 
53  *                   Removed init_module & cleanup_module in favor of 
54  *                   module_init & module_exit.
55  *                   Torben Mathiasen <tmm@image.dk>
56  */
57
58 #define SJCD_VERSION_MAJOR 1
59 #define SJCD_VERSION_MINOR 7
60
61 #include <linux/module.h>
62 #include <linux/errno.h>
63 #include <linux/sched.h>
64 #include <linux/mm.h>
65 #include <linux/timer.h>
66 #include <linux/fs.h>
67 #include <linux/kernel.h>
68 #include <linux/cdrom.h>
69 #include <linux/ioport.h>
70 #include <linux/string.h>
71 #include <linux/major.h>
72 #include <linux/init.h>
73
74 #include <asm/system.h>
75 #include <asm/io.h>
76 #include <asm/uaccess.h>
77 #include <linux/blkdev.h>
78 #include "sjcd.h"
79
80 static int sjcd_present = 0;
81 static struct request_queue *sjcd_queue;
82
83 #define MAJOR_NR SANYO_CDROM_MAJOR
84 #define QUEUE (sjcd_queue)
85 #define CURRENT elv_next_request(sjcd_queue)
86
87 #define SJCD_BUF_SIZ 32         /* cdr-h94a has internal 64K buffer */
88
89 /*
90  * buffer for block size conversion
91  */
92 static char sjcd_buf[2048 * SJCD_BUF_SIZ];
93 static volatile int sjcd_buf_bn[SJCD_BUF_SIZ], sjcd_next_bn;
94 static volatile int sjcd_buf_in, sjcd_buf_out = -1;
95
96 /*
97  * Status.
98  */
99 static unsigned short sjcd_status_valid = 0;
100 static unsigned short sjcd_door_closed;
101 static unsigned short sjcd_door_was_open;
102 static unsigned short sjcd_media_is_available;
103 static unsigned short sjcd_media_is_changed;
104 static unsigned short sjcd_toc_uptodate = 0;
105 static unsigned short sjcd_command_failed;
106 static volatile unsigned char sjcd_completion_status = 0;
107 static volatile unsigned char sjcd_completion_error = 0;
108 static unsigned short sjcd_command_is_in_progress = 0;
109 static unsigned short sjcd_error_reported = 0;
110 static DEFINE_SPINLOCK(sjcd_lock);
111
112 static int sjcd_open_count;
113
114 static int sjcd_audio_status;
115 static struct sjcd_play_msf sjcd_playing;
116
117 static int sjcd_base = SJCD_BASE_ADDR;
118
119 module_param(sjcd_base, int, 0);
120
121 static DECLARE_WAIT_QUEUE_HEAD(sjcd_waitq);
122
123 /*
124  * Data transfer.
125  */
126 static volatile unsigned short sjcd_transfer_is_active = 0;
127
128 enum sjcd_transfer_state {
129         SJCD_S_IDLE = 0,
130         SJCD_S_START = 1,
131         SJCD_S_MODE = 2,
132         SJCD_S_READ = 3,
133         SJCD_S_DATA = 4,
134         SJCD_S_STOP = 5,
135         SJCD_S_STOPPING = 6
136 };
137 static enum sjcd_transfer_state sjcd_transfer_state = SJCD_S_IDLE;
138 static long sjcd_transfer_timeout = 0;
139 static int sjcd_read_count = 0;
140 static unsigned char sjcd_mode = 0;
141
142 #define SJCD_READ_TIMEOUT 5000
143
144 #if defined( SJCD_GATHER_STAT )
145 /*
146  * Statistic.
147  */
148 static struct sjcd_stat statistic;
149 #endif
150
151 /*
152  * Timer.
153  */
154 static DEFINE_TIMER(sjcd_delay_timer, NULL, 0, 0);
155
156 #define SJCD_SET_TIMER( func, tmout )           \
157     ( sjcd_delay_timer.expires = jiffies+tmout,         \
158       sjcd_delay_timer.function = ( void * )func, \
159       add_timer( &sjcd_delay_timer ) )
160
161 #define CLEAR_TIMER del_timer( &sjcd_delay_timer )
162
163 /*
164  * Set up device, i.e., use command line data to set
165  * base address.
166  */
167 #ifndef MODULE
168 static int __init sjcd_setup(char *str)
169 {
170         int ints[2];
171         (void) get_options(str, ARRAY_SIZE(ints), ints);
172         if (ints[0] > 0)
173                 sjcd_base = ints[1];
174
175         return 1;
176 }
177
178 __setup("sjcd=", sjcd_setup);
179
180 #endif
181
182 /*
183  * Special converters.
184  */
185 static unsigned char bin2bcd(int bin)
186 {
187         int u, v;
188
189         u = bin % 10;
190         v = bin / 10;
191         return (u | (v << 4));
192 }
193
194 static int bcd2bin(unsigned char bcd)
195 {
196         return ((bcd >> 4) * 10 + (bcd & 0x0F));
197 }
198
199 static long msf2hsg(struct msf *mp)
200 {
201         return (bcd2bin(mp->frame) + bcd2bin(mp->sec) * 75
202                 + bcd2bin(mp->min) * 4500 - 150);
203 }
204
205 static void hsg2msf(long hsg, struct msf *msf)
206 {
207         hsg += 150;
208         msf->min = hsg / 4500;
209         hsg %= 4500;
210         msf->sec = hsg / 75;
211         msf->frame = hsg % 75;
212         msf->min = bin2bcd(msf->min);   /* convert to BCD */
213         msf->sec = bin2bcd(msf->sec);
214         msf->frame = bin2bcd(msf->frame);
215 }
216
217 /*
218  * Send a command to cdrom. Invalidate status.
219  */
220 static void sjcd_send_cmd(unsigned char cmd)
221 {
222 #if defined( SJCD_TRACE )
223         printk("SJCD: send_cmd( 0x%x )\n", cmd);
224 #endif
225         outb(cmd, SJCDPORT(0));
226         sjcd_command_is_in_progress = 1;
227         sjcd_status_valid = 0;
228         sjcd_command_failed = 0;
229 }
230
231 /*
232  * Send a command with one arg to cdrom. Invalidate status.
233  */
234 static void sjcd_send_1_cmd(unsigned char cmd, unsigned char a)
235 {
236 #if defined( SJCD_TRACE )
237         printk("SJCD: send_1_cmd( 0x%x, 0x%x )\n", cmd, a);
238 #endif
239         outb(cmd, SJCDPORT(0));
240         outb(a, SJCDPORT(0));
241         sjcd_command_is_in_progress = 1;
242         sjcd_status_valid = 0;
243         sjcd_command_failed = 0;
244 }
245
246 /*
247  * Send a command with four args to cdrom. Invalidate status.
248  */
249 static void sjcd_send_4_cmd(unsigned char cmd, unsigned char a,
250                             unsigned char b, unsigned char c,
251                             unsigned char d)
252 {
253 #if defined( SJCD_TRACE )
254         printk("SJCD: send_4_cmd( 0x%x )\n", cmd);
255 #endif
256         outb(cmd, SJCDPORT(0));
257         outb(a, SJCDPORT(0));
258         outb(b, SJCDPORT(0));
259         outb(c, SJCDPORT(0));
260         outb(d, SJCDPORT(0));
261         sjcd_command_is_in_progress = 1;
262         sjcd_status_valid = 0;
263         sjcd_command_failed = 0;
264 }
265
266 /*
267  * Send a play or read command to cdrom. Invalidate Status.
268  */
269 static void sjcd_send_6_cmd(unsigned char cmd, struct sjcd_play_msf *pms)
270 {
271 #if defined( SJCD_TRACE )
272         printk("SJCD: send_long_cmd( 0x%x )\n", cmd);
273 #endif
274         outb(cmd, SJCDPORT(0));
275         outb(pms->start.min, SJCDPORT(0));
276         outb(pms->start.sec, SJCDPORT(0));
277         outb(pms->start.frame, SJCDPORT(0));
278         outb(pms->end.min, SJCDPORT(0));
279         outb(pms->end.sec, SJCDPORT(0));
280         outb(pms->end.frame, SJCDPORT(0));
281         sjcd_command_is_in_progress = 1;
282         sjcd_status_valid = 0;
283         sjcd_command_failed = 0;
284 }
285
286 /*
287  * Get a value from the data port. Should not block, so we use a little
288  * wait for a while. Returns 0 if OK.
289  */
290 static int sjcd_load_response(void *buf, int len)
291 {
292         unsigned char *resp = (unsigned char *) buf;
293
294         for (; len; --len) {
295                 int i;
296                 for (i = 200;
297                      i-- && !SJCD_STATUS_AVAILABLE(inb(SJCDPORT(1))););
298                 if (i > 0)
299                         *resp++ = (unsigned char) inb(SJCDPORT(0));
300                 else
301                         break;
302         }
303         return (len);
304 }
305
306 /*
307  * Load and parse command completion status (drive info byte and maybe error).
308  * Sorry, no error classification yet.
309  */
310 static void sjcd_load_status(void)
311 {
312         sjcd_media_is_changed = 0;
313         sjcd_completion_error = 0;
314         sjcd_completion_status = inb(SJCDPORT(0));
315         if (sjcd_completion_status & SST_DOOR_OPENED) {
316                 sjcd_door_closed = sjcd_media_is_available = 0;
317         } else {
318                 sjcd_door_closed = 1;
319                 if (sjcd_completion_status & SST_MEDIA_CHANGED)
320                         sjcd_media_is_available = sjcd_media_is_changed =
321                             1;
322                 else if (sjcd_completion_status & 0x0F) {
323                         /*
324                          * OK, we seem to catch an error ...
325                          */
326                         while (!SJCD_STATUS_AVAILABLE(inb(SJCDPORT(1))));
327                         sjcd_completion_error = inb(SJCDPORT(0));
328                         if ((sjcd_completion_status & 0x08) &&
329                             (sjcd_completion_error & 0x40))
330                                 sjcd_media_is_available = 0;
331                         else
332                                 sjcd_command_failed = 1;
333                 } else
334                         sjcd_media_is_available = 1;
335         }
336         /*
337          * Ok, status loaded successfully.
338          */
339         sjcd_status_valid = 1, sjcd_error_reported = 0;
340         sjcd_command_is_in_progress = 0;
341
342         /*
343          * If the disk is changed, the TOC is not valid.
344          */
345         if (sjcd_media_is_changed)
346                 sjcd_toc_uptodate = 0;
347 #if defined( SJCD_TRACE )
348         printk("SJCD: status %02x.%02x loaded.\n",
349                (int) sjcd_completion_status, (int) sjcd_completion_error);
350 #endif
351 }
352
353 /*
354  * Read status from cdrom. Check to see if the status is available.
355  */
356 static int sjcd_check_status(void)
357 {
358         /*
359          * Try to load the response from cdrom into buffer.
360          */
361         if (SJCD_STATUS_AVAILABLE(inb(SJCDPORT(1)))) {
362                 sjcd_load_status();
363                 return (1);
364         } else {
365                 /*
366                  * No status is available.
367                  */
368                 return (0);
369         }
370 }
371
372 /*
373  * This is just timeout counter, and nothing more. Surprised ? :-)
374  */
375 static volatile long sjcd_status_timeout;
376
377 /*
378  * We need about 10 seconds to wait. The longest command takes about 5 seconds
379  * to probe the disk (usually after tray closed or drive reset). Other values
380  * should be thought of for other commands.
381  */
382 #define SJCD_WAIT_FOR_STATUS_TIMEOUT 1000
383
384 static void sjcd_status_timer(void)
385 {
386         if (sjcd_check_status()) {
387                 /*
388                  * The command completed and status is loaded, stop waiting.
389                  */
390                 wake_up(&sjcd_waitq);
391         } else if (--sjcd_status_timeout <= 0) {
392                 /*
393                  * We are timed out. 
394                  */
395                 wake_up(&sjcd_waitq);
396         } else {
397                 /*
398                  * We have still some time to wait. Try again.
399                  */
400                 SJCD_SET_TIMER(sjcd_status_timer, 1);
401         }
402 }
403
404 /*
405  * Wait for status for 10 sec approx. Returns non-positive when timed out.
406  * Should not be used while reading data CDs.
407  */
408 static int sjcd_wait_for_status(void)
409 {
410         sjcd_status_timeout = SJCD_WAIT_FOR_STATUS_TIMEOUT;
411         SJCD_SET_TIMER(sjcd_status_timer, 1);
412         sleep_on(&sjcd_waitq);
413 #if defined( SJCD_DIAGNOSTIC ) || defined ( SJCD_TRACE )
414         if (sjcd_status_timeout <= 0)
415                 printk("SJCD: Error Wait For Status.\n");
416 #endif
417         return (sjcd_status_timeout);
418 }
419
420 static int sjcd_receive_status(void)
421 {
422         int i;
423 #if defined( SJCD_TRACE )
424         printk("SJCD: receive_status\n");
425 #endif
426         /*
427          * Wait a bit for status available.
428          */
429         for (i = 200; i-- && (sjcd_check_status() == 0););
430         if (i < 0) {
431 #if defined( SJCD_TRACE )
432                 printk("SJCD: long wait for status\n");
433 #endif
434                 if (sjcd_wait_for_status() <= 0)
435                         printk("SJCD: Timeout when read status.\n");
436                 else
437                         i = 0;
438         }
439         return (i);
440 }
441
442 /*
443  * Load the status. Issue get status command and wait for status available.
444  */
445 static void sjcd_get_status(void)
446 {
447 #if defined( SJCD_TRACE )
448         printk("SJCD: get_status\n");
449 #endif
450         sjcd_send_cmd(SCMD_GET_STATUS);
451         sjcd_receive_status();
452 }
453
454 /*
455  * Check the drive if the disk is changed. Should be revised.
456  */
457 static int sjcd_disk_change(struct gendisk *disk)
458 {
459 #if 0
460         printk("SJCD: sjcd_disk_change(%s)\n", disk->disk_name);
461 #endif
462         if (!sjcd_command_is_in_progress)
463                 sjcd_get_status();
464         return (sjcd_status_valid ? sjcd_media_is_changed : 0);
465 }
466
467 /*
468  * Read the table of contents (TOC) and TOC header if necessary.
469  * We assume that the drive contains no more than 99 toc entries.
470  */
471 static struct sjcd_hw_disk_info sjcd_table_of_contents[SJCD_MAX_TRACKS];
472 static unsigned char sjcd_first_track_no, sjcd_last_track_no;
473 #define sjcd_disk_length  sjcd_table_of_contents[0].un.track_msf
474
475 static int sjcd_update_toc(void)
476 {
477         struct sjcd_hw_disk_info info;
478         int i;
479 #if defined( SJCD_TRACE )
480         printk("SJCD: update toc:\n");
481 #endif
482         /*
483          * check to see if we need to do anything
484          */
485         if (sjcd_toc_uptodate)
486                 return (0);
487
488         /*
489          * Get the TOC start information.
490          */
491         sjcd_send_1_cmd(SCMD_GET_DISK_INFO, SCMD_GET_1_TRACK);
492         sjcd_receive_status();
493
494         if (!sjcd_status_valid) {
495                 printk("SJCD: cannot load status.\n");
496                 return (-1);
497         }
498
499         if (!sjcd_media_is_available) {
500                 printk("SJCD: no disk in drive\n");
501                 return (-1);
502         }
503
504         if (!sjcd_command_failed) {
505                 if (sjcd_load_response(&info, sizeof(info)) != 0) {
506                         printk
507                             ("SJCD: cannot load response about TOC start.\n");
508                         return (-1);
509                 }
510                 sjcd_first_track_no = bcd2bin(info.un.track_no);
511         } else {
512                 printk("SJCD: get first failed\n");
513                 return (-1);
514         }
515 #if defined( SJCD_TRACE )
516         printk("SJCD: TOC start 0x%02x ", sjcd_first_track_no);
517 #endif
518         /*
519          * Get the TOC finish information.
520          */
521         sjcd_send_1_cmd(SCMD_GET_DISK_INFO, SCMD_GET_L_TRACK);
522         sjcd_receive_status();
523
524         if (!sjcd_status_valid) {
525                 printk("SJCD: cannot load status.\n");
526                 return (-1);
527         }
528
529         if (!sjcd_media_is_available) {
530                 printk("SJCD: no disk in drive\n");
531                 return (-1);
532         }
533
534         if (!sjcd_command_failed) {
535                 if (sjcd_load_response(&info, sizeof(info)) != 0) {
536                         printk
537                             ("SJCD: cannot load response about TOC finish.\n");
538                         return (-1);
539                 }
540                 sjcd_last_track_no = bcd2bin(info.un.track_no);
541         } else {
542                 printk("SJCD: get last failed\n");
543                 return (-1);
544         }
545 #if defined( SJCD_TRACE )
546         printk("SJCD: TOC finish 0x%02x ", sjcd_last_track_no);
547 #endif
548         for (i = sjcd_first_track_no; i <= sjcd_last_track_no; i++) {
549                 /*
550                  * Get the first track information.
551                  */
552                 sjcd_send_1_cmd(SCMD_GET_DISK_INFO, bin2bcd(i));
553                 sjcd_receive_status();
554
555                 if (!sjcd_status_valid) {
556                         printk("SJCD: cannot load status.\n");
557                         return (-1);
558                 }
559
560                 if (!sjcd_media_is_available) {
561                         printk("SJCD: no disk in drive\n");
562                         return (-1);
563                 }
564
565                 if (!sjcd_command_failed) {
566                         if (sjcd_load_response(&sjcd_table_of_contents[i],
567                                                sizeof(struct
568                                                       sjcd_hw_disk_info))
569                             != 0) {
570                                 printk
571                                     ("SJCD: cannot load info for %d track\n",
572                                      i);
573                                 return (-1);
574                         }
575                 } else {
576                         printk("SJCD: get info %d failed\n", i);
577                         return (-1);
578                 }
579         }
580
581         /*
582          * Get the disk length info.
583          */
584         sjcd_send_1_cmd(SCMD_GET_DISK_INFO, SCMD_GET_D_SIZE);
585         sjcd_receive_status();
586
587         if (!sjcd_status_valid) {
588                 printk("SJCD: cannot load status.\n");
589                 return (-1);
590         }
591
592         if (!sjcd_media_is_available) {
593                 printk("SJCD: no disk in drive\n");
594                 return (-1);
595         }
596
597         if (!sjcd_command_failed) {
598                 if (sjcd_load_response(&info, sizeof(info)) != 0) {
599                         printk
600                             ("SJCD: cannot load response about disk size.\n");
601                         return (-1);
602                 }
603                 sjcd_disk_length.min = info.un.track_msf.min;
604                 sjcd_disk_length.sec = info.un.track_msf.sec;
605                 sjcd_disk_length.frame = info.un.track_msf.frame;
606         } else {
607                 printk("SJCD: get size failed\n");
608                 return (1);
609         }
610 #if defined( SJCD_TRACE )
611         printk("SJCD: (%02x:%02x.%02x)\n", sjcd_disk_length.min,
612                sjcd_disk_length.sec, sjcd_disk_length.frame);
613 #endif
614         return (0);
615 }
616
617 /*
618  * Load subchannel information.
619  */
620 static int sjcd_get_q_info(struct sjcd_hw_qinfo *qp)
621 {
622         int s;
623 #if defined( SJCD_TRACE )
624         printk("SJCD: load sub q\n");
625 #endif
626         sjcd_send_cmd(SCMD_GET_QINFO);
627         s = sjcd_receive_status();
628         if (s < 0 || sjcd_command_failed || !sjcd_status_valid) {
629                 sjcd_send_cmd(0xF2);
630                 s = sjcd_receive_status();
631                 if (s < 0 || sjcd_command_failed || !sjcd_status_valid)
632                         return (-1);
633                 sjcd_send_cmd(SCMD_GET_QINFO);
634                 s = sjcd_receive_status();
635                 if (s < 0 || sjcd_command_failed || !sjcd_status_valid)
636                         return (-1);
637         }
638         if (sjcd_media_is_available)
639                 if (sjcd_load_response(qp, sizeof(*qp)) == 0)
640                         return (0);
641         return (-1);
642 }
643
644 /*
645  * Start playing from the specified position.
646  */
647 static int sjcd_play(struct sjcd_play_msf *mp)
648 {
649         struct sjcd_play_msf msf;
650
651         /*
652          * Turn the device to play mode.
653          */
654         sjcd_send_1_cmd(SCMD_SET_MODE, SCMD_MODE_PLAY);
655         if (sjcd_receive_status() < 0)
656                 return (-1);
657
658         /*
659          * Seek to the starting point.
660          */
661         msf.start = mp->start;
662         msf.end.min = msf.end.sec = msf.end.frame = 0x00;
663         sjcd_send_6_cmd(SCMD_SEEK, &msf);
664         if (sjcd_receive_status() < 0)
665                 return (-1);
666
667         /*
668          * Start playing.
669          */
670         sjcd_send_6_cmd(SCMD_PLAY, mp);
671         return (sjcd_receive_status());
672 }
673
674 /*
675  * Tray control functions.
676  */
677 static int sjcd_tray_close(void)
678 {
679 #if defined( SJCD_TRACE )
680         printk("SJCD: tray_close\n");
681 #endif
682         sjcd_send_cmd(SCMD_CLOSE_TRAY);
683         return (sjcd_receive_status());
684 }
685
686 static int sjcd_tray_lock(void)
687 {
688 #if defined( SJCD_TRACE )
689         printk("SJCD: tray_lock\n");
690 #endif
691         sjcd_send_cmd(SCMD_LOCK_TRAY);
692         return (sjcd_receive_status());
693 }
694
695 static int sjcd_tray_unlock(void)
696 {
697 #if defined( SJCD_TRACE )
698         printk("SJCD: tray_unlock\n");
699 #endif
700         sjcd_send_cmd(SCMD_UNLOCK_TRAY);
701         return (sjcd_receive_status());
702 }
703
704 static int sjcd_tray_open(void)
705 {
706 #if defined( SJCD_TRACE )
707         printk("SJCD: tray_open\n");
708 #endif
709         sjcd_send_cmd(SCMD_EJECT_TRAY);
710         return (sjcd_receive_status());
711 }
712
713 /*
714  * Do some user commands.
715  */
716 static int sjcd_ioctl(struct inode *ip, struct file *fp,
717                       unsigned int cmd, unsigned long arg)
718 {
719         void __user *argp = (void __user *)arg;
720 #if defined( SJCD_TRACE )
721         printk("SJCD:ioctl\n");
722 #endif
723
724         sjcd_get_status();
725         if (!sjcd_status_valid)
726                 return (-EIO);
727         if (sjcd_update_toc() < 0)
728                 return (-EIO);
729
730         switch (cmd) {
731         case CDROMSTART:{
732 #if defined( SJCD_TRACE )
733                         printk("SJCD: ioctl: start\n");
734 #endif
735                         return (0);
736                 }
737
738         case CDROMSTOP:{
739 #if defined( SJCD_TRACE )
740                         printk("SJCD: ioctl: stop\n");
741 #endif
742                         sjcd_send_cmd(SCMD_PAUSE);
743                         (void) sjcd_receive_status();
744                         sjcd_audio_status = CDROM_AUDIO_NO_STATUS;
745                         return (0);
746                 }
747
748         case CDROMPAUSE:{
749                         struct sjcd_hw_qinfo q_info;
750 #if defined( SJCD_TRACE )
751                         printk("SJCD: ioctl: pause\n");
752 #endif
753                         if (sjcd_audio_status == CDROM_AUDIO_PLAY) {
754                                 sjcd_send_cmd(SCMD_PAUSE);
755                                 (void) sjcd_receive_status();
756                                 if (sjcd_get_q_info(&q_info) < 0) {
757                                         sjcd_audio_status =
758                                             CDROM_AUDIO_NO_STATUS;
759                                 } else {
760                                         sjcd_audio_status =
761                                             CDROM_AUDIO_PAUSED;
762                                         sjcd_playing.start = q_info.abs;
763                                 }
764                                 return (0);
765                         } else
766                                 return (-EINVAL);
767                 }
768
769         case CDROMRESUME:{
770 #if defined( SJCD_TRACE )
771                         printk("SJCD: ioctl: resume\n");
772 #endif
773                         if (sjcd_audio_status == CDROM_AUDIO_PAUSED) {
774                                 /*
775                                  * continue play starting at saved location
776                                  */
777                                 if (sjcd_play(&sjcd_playing) < 0) {
778                                         sjcd_audio_status =
779                                             CDROM_AUDIO_ERROR;
780                                         return (-EIO);
781                                 } else {
782                                         sjcd_audio_status =
783                                             CDROM_AUDIO_PLAY;
784                                         return (0);
785                                 }
786                         } else
787                                 return (-EINVAL);
788                 }
789
790         case CDROMPLAYTRKIND:{
791                         struct cdrom_ti ti;
792                         int s = -EFAULT;
793 #if defined( SJCD_TRACE )
794                         printk("SJCD: ioctl: playtrkind\n");
795 #endif
796                         if (!copy_from_user(&ti, argp, sizeof(ti))) {
797                                 s = 0;
798                                 if (ti.cdti_trk0 < sjcd_first_track_no)
799                                         return (-EINVAL);
800                                 if (ti.cdti_trk1 > sjcd_last_track_no)
801                                         ti.cdti_trk1 = sjcd_last_track_no;
802                                 if (ti.cdti_trk0 > ti.cdti_trk1)
803                                         return (-EINVAL);
804
805                                 sjcd_playing.start =
806                                     sjcd_table_of_contents[ti.cdti_trk0].
807                                     un.track_msf;
808                                 sjcd_playing.end =
809                                     (ti.cdti_trk1 <
810                                      sjcd_last_track_no) ?
811                                     sjcd_table_of_contents[ti.cdti_trk1 +
812                                                            1].un.
813                                     track_msf : sjcd_table_of_contents[0].
814                                     un.track_msf;
815
816                                 if (sjcd_play(&sjcd_playing) < 0) {
817                                         sjcd_audio_status =
818                                             CDROM_AUDIO_ERROR;
819                                         return (-EIO);
820                                 } else
821                                         sjcd_audio_status =
822                                             CDROM_AUDIO_PLAY;
823                         }
824                         return (s);
825                 }
826
827         case CDROMPLAYMSF:{
828                         struct cdrom_msf sjcd_msf;
829                         int s;
830 #if defined( SJCD_TRACE )
831                         printk("SJCD: ioctl: playmsf\n");
832 #endif
833                         if ((s =
834                              access_ok(VERIFY_READ, argp, sizeof(sjcd_msf))
835                                         ? 0 : -EFAULT) == 0) {
836                                 if (sjcd_audio_status == CDROM_AUDIO_PLAY) {
837                                         sjcd_send_cmd(SCMD_PAUSE);
838                                         (void) sjcd_receive_status();
839                                         sjcd_audio_status =
840                                             CDROM_AUDIO_NO_STATUS;
841                                 }
842
843                                 if (copy_from_user(&sjcd_msf, argp,
844                                                sizeof(sjcd_msf)))
845                                         return (-EFAULT);
846
847                                 sjcd_playing.start.min =
848                                     bin2bcd(sjcd_msf.cdmsf_min0);
849                                 sjcd_playing.start.sec =
850                                     bin2bcd(sjcd_msf.cdmsf_sec0);
851                                 sjcd_playing.start.frame =
852                                     bin2bcd(sjcd_msf.cdmsf_frame0);
853                                 sjcd_playing.end.min =
854                                     bin2bcd(sjcd_msf.cdmsf_min1);
855                                 sjcd_playing.end.sec =
856                                     bin2bcd(sjcd_msf.cdmsf_sec1);
857                                 sjcd_playing.end.frame =
858                                     bin2bcd(sjcd_msf.cdmsf_frame1);
859
860                                 if (sjcd_play(&sjcd_playing) < 0) {
861                                         sjcd_audio_status =
862                                             CDROM_AUDIO_ERROR;
863                                         return (-EIO);
864                                 } else
865                                         sjcd_audio_status =
866                                             CDROM_AUDIO_PLAY;
867                         }
868                         return (s);
869                 }
870
871         case CDROMREADTOCHDR:{
872                         struct cdrom_tochdr toc_header;
873 #if defined (SJCD_TRACE )
874                         printk("SJCD: ioctl: readtocheader\n");
875 #endif
876                         toc_header.cdth_trk0 = sjcd_first_track_no;
877                         toc_header.cdth_trk1 = sjcd_last_track_no;
878                         if (copy_to_user(argp, &toc_header,
879                                          sizeof(toc_header)))
880                                 return -EFAULT;
881                         return 0;
882                 }
883
884         case CDROMREADTOCENTRY:{
885                         struct cdrom_tocentry toc_entry;
886                         int s;
887 #if defined( SJCD_TRACE )
888                         printk("SJCD: ioctl: readtocentry\n");
889 #endif
890                         if ((s =
891                              access_ok(VERIFY_WRITE, argp, sizeof(toc_entry))
892                                         ? 0 : -EFAULT) == 0) {
893                                 struct sjcd_hw_disk_info *tp;
894
895                                 if (copy_from_user(&toc_entry, argp,
896                                                sizeof(toc_entry)))
897                                         return (-EFAULT);
898                                 if (toc_entry.cdte_track == CDROM_LEADOUT)
899                                         tp = &sjcd_table_of_contents[0];
900                                 else if (toc_entry.cdte_track <
901                                          sjcd_first_track_no)
902                                         return (-EINVAL);
903                                 else if (toc_entry.cdte_track >
904                                          sjcd_last_track_no)
905                                         return (-EINVAL);
906                                 else
907                                         tp = &sjcd_table_of_contents
908                                             [toc_entry.cdte_track];
909
910                                 toc_entry.cdte_adr =
911                                     tp->track_control & 0x0F;
912                                 toc_entry.cdte_ctrl =
913                                     tp->track_control >> 4;
914
915                                 switch (toc_entry.cdte_format) {
916                                 case CDROM_LBA:
917                                         toc_entry.cdte_addr.lba =
918                                             msf2hsg(&(tp->un.track_msf));
919                                         break;
920                                 case CDROM_MSF:
921                                         toc_entry.cdte_addr.msf.minute =
922                                             bcd2bin(tp->un.track_msf.min);
923                                         toc_entry.cdte_addr.msf.second =
924                                             bcd2bin(tp->un.track_msf.sec);
925                                         toc_entry.cdte_addr.msf.frame =
926                                             bcd2bin(tp->un.track_msf.
927                                                     frame);
928                                         break;
929                                 default:
930                                         return (-EINVAL);
931                                 }
932                                 if (copy_to_user(argp, &toc_entry,
933                                                  sizeof(toc_entry)))
934                                         s = -EFAULT;
935                         }
936                         return (s);
937                 }
938
939         case CDROMSUBCHNL:{
940                         struct cdrom_subchnl subchnl;
941                         int s;
942 #if defined( SJCD_TRACE )
943                         printk("SJCD: ioctl: subchnl\n");
944 #endif
945                         if ((s =
946                              access_ok(VERIFY_WRITE, argp, sizeof(subchnl))
947                                         ? 0 : -EFAULT) == 0) {
948                                 struct sjcd_hw_qinfo q_info;
949
950                                 if (copy_from_user(&subchnl, argp,
951                                                sizeof(subchnl)))
952                                         return (-EFAULT);
953
954                                 if (sjcd_get_q_info(&q_info) < 0)
955                                         return (-EIO);
956
957                                 subchnl.cdsc_audiostatus =
958                                     sjcd_audio_status;
959                                 subchnl.cdsc_adr =
960                                     q_info.track_control & 0x0F;
961                                 subchnl.cdsc_ctrl =
962                                     q_info.track_control >> 4;
963                                 subchnl.cdsc_trk =
964                                     bcd2bin(q_info.track_no);
965                                 subchnl.cdsc_ind = bcd2bin(q_info.x);
966
967                                 switch (subchnl.cdsc_format) {
968                                 case CDROM_LBA:
969                                         subchnl.cdsc_absaddr.lba =
970                                             msf2hsg(&(q_info.abs));
971                                         subchnl.cdsc_reladdr.lba =
972                                             msf2hsg(&(q_info.rel));
973                                         break;
974                                 case CDROM_MSF:
975                                         subchnl.cdsc_absaddr.msf.minute =
976                                             bcd2bin(q_info.abs.min);
977                                         subchnl.cdsc_absaddr.msf.second =
978                                             bcd2bin(q_info.abs.sec);
979                                         subchnl.cdsc_absaddr.msf.frame =
980                                             bcd2bin(q_info.abs.frame);
981                                         subchnl.cdsc_reladdr.msf.minute =
982                                             bcd2bin(q_info.rel.min);
983                                         subchnl.cdsc_reladdr.msf.second =
984                                             bcd2bin(q_info.rel.sec);
985                                         subchnl.cdsc_reladdr.msf.frame =
986                                             bcd2bin(q_info.rel.frame);
987                                         break;
988                                 default:
989                                         return (-EINVAL);
990                                 }
991                                 if (copy_to_user(argp, &subchnl,
992                                                  sizeof(subchnl)))
993                                         s = -EFAULT;
994                         }
995                         return (s);
996                 }
997
998         case CDROMVOLCTRL:{
999                         struct cdrom_volctrl vol_ctrl;
1000                         int s;
1001 #if defined( SJCD_TRACE )
1002                         printk("SJCD: ioctl: volctrl\n");
1003 #endif
1004                         if ((s =
1005                              access_ok(VERIFY_READ, argp, sizeof(vol_ctrl))
1006                                         ? 0 : -EFAULT) == 0) {
1007                                 unsigned char dummy[4];
1008
1009                                 if (copy_from_user(&vol_ctrl, argp,
1010                                                sizeof(vol_ctrl)))
1011                                         return (-EFAULT);
1012                                 sjcd_send_4_cmd(SCMD_SET_VOLUME,
1013                                                 vol_ctrl.channel0, 0xFF,
1014                                                 vol_ctrl.channel1, 0xFF);
1015                                 if (sjcd_receive_status() < 0)
1016                                         return (-EIO);
1017                                 (void) sjcd_load_response(dummy, 4);
1018                         }
1019                         return (s);
1020                 }
1021
1022         case CDROMEJECT:{
1023 #if defined( SJCD_TRACE )
1024                         printk("SJCD: ioctl: eject\n");
1025 #endif
1026                         if (!sjcd_command_is_in_progress) {
1027                                 sjcd_tray_unlock();
1028                                 sjcd_send_cmd(SCMD_EJECT_TRAY);
1029                                 (void) sjcd_receive_status();
1030                         }
1031                         return (0);
1032                 }
1033
1034 #if defined( SJCD_GATHER_STAT )
1035         case 0xABCD:{
1036 #if defined( SJCD_TRACE )
1037                         printk("SJCD: ioctl: statistic\n");
1038 #endif
1039                         if (copy_to_user(argp, &statistic, sizeof(statistic)))
1040                                 return -EFAULT;
1041                         return 0;
1042                 }
1043 #endif
1044
1045         default:
1046                 return (-EINVAL);
1047         }
1048 }
1049
1050 /*
1051  * Invalidate internal buffers of the driver.
1052  */
1053 static void sjcd_invalidate_buffers(void)
1054 {
1055         int i;
1056         for (i = 0; i < SJCD_BUF_SIZ; sjcd_buf_bn[i++] = -1);
1057         sjcd_buf_out = -1;
1058 }
1059
1060 /*
1061  * Take care of the different block sizes between cdrom and Linux.
1062  * When Linux gets variable block sizes this will probably go away.
1063  */
1064
1065 static int current_valid(void)
1066 {
1067         return CURRENT &&
1068                 CURRENT->cmd == READ &&
1069                 CURRENT->sector != -1;
1070 }
1071
1072 static void sjcd_transfer(void)
1073 {
1074 #if defined( SJCD_TRACE )
1075         printk("SJCD: transfer:\n");
1076 #endif
1077         if (current_valid()) {
1078                 while (CURRENT->nr_sectors) {
1079                         int i, bn = CURRENT->sector / 4;
1080                         for (i = 0;
1081                              i < SJCD_BUF_SIZ && sjcd_buf_bn[i] != bn;
1082                              i++);
1083                         if (i < SJCD_BUF_SIZ) {
1084                                 int offs =
1085                                     (i * 4 + (CURRENT->sector & 3)) * 512;
1086                                 int nr_sectors = 4 - (CURRENT->sector & 3);
1087                                 if (sjcd_buf_out != i) {
1088                                         sjcd_buf_out = i;
1089                                         if (sjcd_buf_bn[i] != bn) {
1090                                                 sjcd_buf_out = -1;
1091                                                 continue;
1092                                         }
1093                                 }
1094                                 if (nr_sectors > CURRENT->nr_sectors)
1095                                         nr_sectors = CURRENT->nr_sectors;
1096 #if defined( SJCD_TRACE )
1097                                 printk("SJCD: copy out\n");
1098 #endif
1099                                 memcpy(CURRENT->buffer, sjcd_buf + offs,
1100                                        nr_sectors * 512);
1101                                 CURRENT->nr_sectors -= nr_sectors;
1102                                 CURRENT->sector += nr_sectors;
1103                                 CURRENT->buffer += nr_sectors * 512;
1104                         } else {
1105                                 sjcd_buf_out = -1;
1106                                 break;
1107                         }
1108                 }
1109         }
1110 #if defined( SJCD_TRACE )
1111         printk("SJCD: transfer: done\n");
1112 #endif
1113 }
1114
1115 static void sjcd_poll(void)
1116 {
1117 #if defined( SJCD_GATHER_STAT )
1118         /*
1119          * Update total number of ticks.
1120          */
1121         statistic.ticks++;
1122         statistic.tticks[sjcd_transfer_state]++;
1123 #endif
1124
1125       ReSwitch:switch (sjcd_transfer_state) {
1126
1127         case SJCD_S_IDLE:{
1128 #if defined( SJCD_GATHER_STAT )
1129                         statistic.idle_ticks++;
1130 #endif
1131 #if defined( SJCD_TRACE )
1132                         printk("SJCD_S_IDLE\n");
1133 #endif
1134                         return;
1135                 }
1136
1137         case SJCD_S_START:{
1138 #if defined( SJCD_GATHER_STAT )
1139                         statistic.start_ticks++;
1140 #endif
1141                         sjcd_send_cmd(SCMD_GET_STATUS);
1142                         sjcd_transfer_state =
1143                             sjcd_mode ==
1144                             SCMD_MODE_COOKED ? SJCD_S_READ : SJCD_S_MODE;
1145                         sjcd_transfer_timeout = 500;
1146 #if defined( SJCD_TRACE )
1147                         printk("SJCD_S_START: goto SJCD_S_%s mode\n",
1148                                sjcd_transfer_state ==
1149                                SJCD_S_READ ? "READ" : "MODE");
1150 #endif
1151                         break;
1152                 }
1153
1154         case SJCD_S_MODE:{
1155                         if (sjcd_check_status()) {
1156                                 /*
1157                                  * Previous command is completed.
1158                                  */
1159                                 if (!sjcd_status_valid
1160                                     || sjcd_command_failed) {
1161 #if defined( SJCD_TRACE )
1162                                         printk
1163                                             ("SJCD_S_MODE: pre-cmd failed: goto to SJCD_S_STOP mode\n");
1164 #endif
1165                                         sjcd_transfer_state = SJCD_S_STOP;
1166                                         goto ReSwitch;
1167                                 }
1168
1169                                 sjcd_mode = 0;  /* unknown mode; should not be valid when failed */
1170                                 sjcd_send_1_cmd(SCMD_SET_MODE,
1171                                                 SCMD_MODE_COOKED);
1172                                 sjcd_transfer_state = SJCD_S_READ;
1173                                 sjcd_transfer_timeout = 1000;
1174 #if defined( SJCD_TRACE )
1175                                 printk
1176                                     ("SJCD_S_MODE: goto SJCD_S_READ mode\n");
1177 #endif
1178                         }
1179 #if defined( SJCD_GATHER_STAT )
1180                         else
1181                                 statistic.mode_ticks++;
1182 #endif
1183                         break;
1184                 }
1185
1186         case SJCD_S_READ:{
1187                         if (sjcd_status_valid ? 1 : sjcd_check_status()) {
1188                                 /*
1189                                  * Previous command is completed.
1190                                  */
1191                                 if (!sjcd_status_valid
1192                                     || sjcd_command_failed) {
1193 #if defined( SJCD_TRACE )
1194                                         printk
1195                                             ("SJCD_S_READ: pre-cmd failed: goto to SJCD_S_STOP mode\n");
1196 #endif
1197                                         sjcd_transfer_state = SJCD_S_STOP;
1198                                         goto ReSwitch;
1199                                 }
1200                                 if (!sjcd_media_is_available) {
1201 #if defined( SJCD_TRACE )
1202                                         printk
1203                                             ("SJCD_S_READ: no disk: goto to SJCD_S_STOP mode\n");
1204 #endif
1205                                         sjcd_transfer_state = SJCD_S_STOP;
1206                                         goto ReSwitch;
1207                                 }
1208                                 if (sjcd_mode != SCMD_MODE_COOKED) {
1209                                         /*
1210                                          * We seem to come from set mode. So discard one byte of result.
1211                                          */
1212                                         if (sjcd_load_response
1213                                             (&sjcd_mode, 1) != 0) {
1214 #if defined( SJCD_TRACE )
1215                                                 printk
1216                                                     ("SJCD_S_READ: load failed: goto to SJCD_S_STOP mode\n");
1217 #endif
1218                                                 sjcd_transfer_state =
1219                                                     SJCD_S_STOP;
1220                                                 goto ReSwitch;
1221                                         }
1222                                         if (sjcd_mode != SCMD_MODE_COOKED) {
1223 #if defined( SJCD_TRACE )
1224                                                 printk
1225                                                     ("SJCD_S_READ: mode failed: goto to SJCD_S_STOP mode\n");
1226 #endif
1227                                                 sjcd_transfer_state =
1228                                                     SJCD_S_STOP;
1229                                                 goto ReSwitch;
1230                                         }
1231                                 }
1232
1233                                 if (current_valid()) {
1234                                         struct sjcd_play_msf msf;
1235
1236                                         sjcd_next_bn = CURRENT->sector / 4;
1237                                         hsg2msf(sjcd_next_bn, &msf.start);
1238                                         msf.end.min = 0;
1239                                         msf.end.sec = 0;
1240                                         msf.end.frame = sjcd_read_count =
1241                                             SJCD_BUF_SIZ;
1242 #if defined( SJCD_TRACE )
1243                                         printk
1244                                             ("SJCD: ---reading msf-address %x:%x:%x  %x:%x:%x\n",
1245                                              msf.start.min, msf.start.sec,
1246                                              msf.start.frame, msf.end.min,
1247                                              msf.end.sec, msf.end.frame);
1248                                         printk
1249                                             ("sjcd_next_bn:%x buf_in:%x buf_out:%x buf_bn:%x\n",
1250                                              sjcd_next_bn, sjcd_buf_in,
1251                                              sjcd_buf_out,
1252                                              sjcd_buf_bn[sjcd_buf_in]);
1253 #endif
1254                                         sjcd_send_6_cmd(SCMD_DATA_READ,
1255                                                         &msf);
1256                                         sjcd_transfer_state = SJCD_S_DATA;
1257                                         sjcd_transfer_timeout = 500;
1258 #if defined( SJCD_TRACE )
1259                                         printk
1260                                             ("SJCD_S_READ: go to SJCD_S_DATA mode\n");
1261 #endif
1262                                 } else {
1263 #if defined( SJCD_TRACE )
1264                                         printk
1265                                             ("SJCD_S_READ: nothing to read: go to SJCD_S_STOP mode\n");
1266 #endif
1267                                         sjcd_transfer_state = SJCD_S_STOP;
1268                                         goto ReSwitch;
1269                                 }
1270                         }
1271 #if defined( SJCD_GATHER_STAT )
1272                         else
1273                                 statistic.read_ticks++;
1274 #endif
1275                         break;
1276                 }
1277
1278         case SJCD_S_DATA:{
1279                         unsigned char stat;
1280
1281                       sjcd_s_data:stat =
1282                             inb(SJCDPORT
1283                                 (1));
1284 #if defined( SJCD_TRACE )
1285                         printk("SJCD_S_DATA: status = 0x%02x\n", stat);
1286 #endif
1287                         if (SJCD_STATUS_AVAILABLE(stat)) {
1288                                 /*
1289                                  * No data is waiting for us in the drive buffer. Status of operation
1290                                  * completion is available. Read and parse it.
1291                                  */
1292                                 sjcd_load_status();
1293
1294                                 if (!sjcd_status_valid
1295                                     || sjcd_command_failed) {
1296 #if defined( SJCD_TRACE )
1297                                         printk
1298                                             ("SJCD: read block %d failed, maybe audio disk? Giving up\n",
1299                                              sjcd_next_bn);
1300 #endif
1301                                         if (current_valid())
1302                                                 end_request(CURRENT, 0);
1303 #if defined( SJCD_TRACE )
1304                                         printk
1305                                             ("SJCD_S_DATA: pre-cmd failed: go to SJCD_S_STOP mode\n");
1306 #endif
1307                                         sjcd_transfer_state = SJCD_S_STOP;
1308                                         goto ReSwitch;
1309                                 }
1310
1311                                 if (!sjcd_media_is_available) {
1312                                         printk
1313                                             ("SJCD_S_DATA: no disk: go to SJCD_S_STOP mode\n");
1314                                         sjcd_transfer_state = SJCD_S_STOP;
1315                                         goto ReSwitch;
1316                                 }
1317
1318                                 sjcd_transfer_state = SJCD_S_READ;
1319                                 goto ReSwitch;
1320                         } else if (SJCD_DATA_AVAILABLE(stat)) {
1321                                 /*
1322                                  * One frame is read into device buffer. We must copy it to our memory.
1323                                  * Otherwise cdrom hangs up. Check to see if we have something to copy
1324                                  * to.
1325                                  */
1326                                 if (!current_valid()
1327                                     && sjcd_buf_in == sjcd_buf_out) {
1328 #if defined( SJCD_TRACE )
1329                                         printk
1330                                             ("SJCD_S_DATA: nothing to read: go to SJCD_S_STOP mode\n");
1331                                         printk
1332                                             (" ... all the date would be discarded\n");
1333 #endif
1334                                         sjcd_transfer_state = SJCD_S_STOP;
1335                                         goto ReSwitch;
1336                                 }
1337
1338                                 /*
1339                                  * Everything seems to be OK. Just read the frame and recalculate
1340                                  * indices.
1341                                  */
1342                                 sjcd_buf_bn[sjcd_buf_in] = -1;  /* ??? */
1343                                 insb(SJCDPORT(2),
1344                                      sjcd_buf + 2048 * sjcd_buf_in, 2048);
1345 #if defined( SJCD_TRACE )
1346                                 printk
1347                                     ("SJCD_S_DATA: next_bn=%d, buf_in=%d, buf_out=%d, buf_bn=%d\n",
1348                                      sjcd_next_bn, sjcd_buf_in,
1349                                      sjcd_buf_out,
1350                                      sjcd_buf_bn[sjcd_buf_in]);
1351 #endif
1352                                 sjcd_buf_bn[sjcd_buf_in] = sjcd_next_bn++;
1353                                 if (sjcd_buf_out == -1)
1354                                         sjcd_buf_out = sjcd_buf_in;
1355                                 if (++sjcd_buf_in == SJCD_BUF_SIZ)
1356                                         sjcd_buf_in = 0;
1357
1358                                 /*
1359                                  * Only one frame is ready at time. So we should turn over to wait for
1360                                  * another frame. If we need that, of course.
1361                                  */
1362                                 if (--sjcd_read_count == 0) {
1363                                         /*
1364                                          * OK, request seems to be precessed. Continue transferring...
1365                                          */
1366                                         if (!sjcd_transfer_is_active) {
1367                                                 while (current_valid()) {
1368                                                         /*
1369                                                          * Continue transferring.
1370                                                          */
1371                                                         sjcd_transfer();
1372                                                         if (CURRENT->
1373                                                             nr_sectors ==
1374                                                             0)
1375                                                                 end_request
1376                                                                     (CURRENT, 1);
1377                                                         else
1378                                                                 break;
1379                                                 }
1380                                         }
1381                                         if (current_valid() &&
1382                                             (CURRENT->sector / 4 <
1383                                              sjcd_next_bn
1384                                              || CURRENT->sector / 4 >
1385                                              sjcd_next_bn +
1386                                              SJCD_BUF_SIZ)) {
1387 #if defined( SJCD_TRACE )
1388                                                 printk
1389                                                     ("SJCD_S_DATA: can't read: go to SJCD_S_STOP mode\n");
1390 #endif
1391                                                 sjcd_transfer_state =
1392                                                     SJCD_S_STOP;
1393                                                 goto ReSwitch;
1394                                         }
1395                                 }
1396                                 /*
1397                                  * Now we should turn around rather than wait for while.
1398                                  */
1399                                 goto sjcd_s_data;
1400                         }
1401 #if defined( SJCD_GATHER_STAT )
1402                         else
1403                                 statistic.data_ticks++;
1404 #endif
1405                         break;
1406                 }
1407
1408         case SJCD_S_STOP:{
1409                         sjcd_read_count = 0;
1410                         sjcd_send_cmd(SCMD_STOP);
1411                         sjcd_transfer_state = SJCD_S_STOPPING;
1412                         sjcd_transfer_timeout = 500;
1413 #if defined( SJCD_GATHER_STAT )
1414                         statistic.stop_ticks++;
1415 #endif
1416                         break;
1417                 }
1418
1419         case SJCD_S_STOPPING:{
1420                         unsigned char stat;
1421
1422                         stat = inb(SJCDPORT(1));
1423 #if defined( SJCD_TRACE )
1424                         printk("SJCD_S_STOP: status = 0x%02x\n", stat);
1425 #endif
1426                         if (SJCD_DATA_AVAILABLE(stat)) {
1427                                 int i;
1428 #if defined( SJCD_TRACE )
1429                                 printk("SJCD_S_STOP: discard data\n");
1430 #endif
1431                                 /*
1432                                  * Discard all the data from the pipe. Foolish method.
1433                                  */
1434                                 for (i = 2048; i--;
1435                                      (void) inb(SJCDPORT(2)));
1436                                 sjcd_transfer_timeout = 500;
1437                         } else if (SJCD_STATUS_AVAILABLE(stat)) {
1438                                 sjcd_load_status();
1439                                 if (sjcd_status_valid
1440                                     && sjcd_media_is_changed) {
1441                                         sjcd_toc_uptodate = 0;
1442                                         sjcd_invalidate_buffers();
1443                                 }
1444                                 if (current_valid()) {
1445                                         if (sjcd_status_valid)
1446                                                 sjcd_transfer_state =
1447                                                     SJCD_S_READ;
1448                                         else
1449                                                 sjcd_transfer_state =
1450                                                     SJCD_S_START;
1451                                 } else
1452                                         sjcd_transfer_state = SJCD_S_IDLE;
1453                                 goto ReSwitch;
1454                         }
1455 #if defined( SJCD_GATHER_STAT )
1456                         else
1457                                 statistic.stopping_ticks++;
1458 #endif
1459                         break;
1460                 }
1461
1462         default:
1463                 printk("SJCD: poll: invalid state %d\n",
1464                        sjcd_transfer_state);
1465                 return;
1466         }
1467
1468         if (--sjcd_transfer_timeout == 0) {
1469                 printk("SJCD: timeout in state %d\n", sjcd_transfer_state);
1470                 while (current_valid())
1471                         end_request(CURRENT, 0);
1472                 sjcd_send_cmd(SCMD_STOP);
1473                 sjcd_transfer_state = SJCD_S_IDLE;
1474                 goto ReSwitch;
1475         }
1476
1477         /*
1478          * Get back in some time. 1 should be replaced with count variable to
1479          * avoid unnecessary testings.
1480          */
1481         SJCD_SET_TIMER(sjcd_poll, 1);
1482 }
1483
1484 static void do_sjcd_request(request_queue_t * q)
1485 {
1486 #if defined( SJCD_TRACE )
1487         printk("SJCD: do_sjcd_request(%ld+%ld)\n",
1488                CURRENT->sector, CURRENT->nr_sectors);
1489 #endif
1490         sjcd_transfer_is_active = 1;
1491         while (current_valid()) {
1492                 sjcd_transfer();
1493                 if (CURRENT->nr_sectors == 0)
1494                         end_request(CURRENT, 1);
1495                 else {
1496                         sjcd_buf_out = -1;      /* Want to read a block not in buffer */
1497                         if (sjcd_transfer_state == SJCD_S_IDLE) {
1498                                 if (!sjcd_toc_uptodate) {
1499                                         if (sjcd_update_toc() < 0) {
1500                                                 printk
1501                                                     ("SJCD: transfer: discard\n");
1502                                                 while (current_valid())
1503                                                         end_request(CURRENT, 0);
1504                                                 break;
1505                                         }
1506                                 }
1507                                 sjcd_transfer_state = SJCD_S_START;
1508                                 SJCD_SET_TIMER(sjcd_poll, HZ / 100);
1509                         }
1510                         break;
1511                 }
1512         }
1513         sjcd_transfer_is_active = 0;
1514 #if defined( SJCD_TRACE )
1515         printk
1516             ("sjcd_next_bn:%x sjcd_buf_in:%x sjcd_buf_out:%x sjcd_buf_bn:%x\n",
1517              sjcd_next_bn, sjcd_buf_in, sjcd_buf_out,
1518              sjcd_buf_bn[sjcd_buf_in]);
1519         printk("do_sjcd_request ends\n");
1520 #endif
1521 }
1522
1523 /*
1524  * Open the device special file. Check disk is in.
1525  */
1526 static int sjcd_open(struct inode *ip, struct file *fp)
1527 {
1528         /*
1529          * Check the presence of device.
1530          */
1531         if (!sjcd_present)
1532                 return (-ENXIO);
1533
1534         /*
1535          * Only read operations are allowed. Really? (:-)
1536          */
1537         if (fp->f_mode & 2)
1538                 return (-EROFS);
1539
1540         if (sjcd_open_count == 0) {
1541                 int s, sjcd_open_tries;
1542 /* We don't know that, do we? */
1543 /*
1544     sjcd_audio_status = CDROM_AUDIO_NO_STATUS;
1545 */
1546                 sjcd_mode = 0;
1547                 sjcd_door_was_open = 0;
1548                 sjcd_transfer_state = SJCD_S_IDLE;
1549                 sjcd_invalidate_buffers();
1550                 sjcd_status_valid = 0;
1551
1552                 /*
1553                  * Strict status checking.
1554                  */
1555                 for (sjcd_open_tries = 4; --sjcd_open_tries;) {
1556                         if (!sjcd_status_valid)
1557                                 sjcd_get_status();
1558                         if (!sjcd_status_valid) {
1559 #if defined( SJCD_DIAGNOSTIC )
1560                                 printk
1561                                     ("SJCD: open: timed out when check status.\n");
1562 #endif
1563                                 goto err_out;
1564                         } else if (!sjcd_media_is_available) {
1565 #if defined( SJCD_DIAGNOSTIC )
1566                                 printk("SJCD: open: no disk in drive\n");
1567 #endif
1568                                 if (!sjcd_door_closed) {
1569                                         sjcd_door_was_open = 1;
1570 #if defined( SJCD_TRACE )
1571                                         printk
1572                                             ("SJCD: open: close the tray\n");
1573 #endif
1574                                         s = sjcd_tray_close();
1575                                         if (s < 0 || !sjcd_status_valid
1576                                             || sjcd_command_failed) {
1577 #if defined( SJCD_DIAGNOSTIC )
1578                                                 printk
1579                                                     ("SJCD: open: tray close attempt failed\n");
1580 #endif
1581                                                 goto err_out;
1582                                         }
1583                                         continue;
1584                                 } else
1585                                         goto err_out;
1586                         }
1587                         break;
1588                 }
1589                 s = sjcd_tray_lock();
1590                 if (s < 0 || !sjcd_status_valid || sjcd_command_failed) {
1591 #if defined( SJCD_DIAGNOSTIC )
1592                         printk("SJCD: open: tray lock attempt failed\n");
1593 #endif
1594                         goto err_out;
1595                 }
1596 #if defined( SJCD_TRACE )
1597                 printk("SJCD: open: done\n");
1598 #endif
1599         }
1600
1601         ++sjcd_open_count;
1602         return (0);
1603
1604       err_out:
1605         return (-EIO);
1606 }
1607
1608 /*
1609  * On close, we flush all sjcd blocks from the buffer cache.
1610  */
1611 static int sjcd_release(struct inode *inode, struct file *file)
1612 {
1613         int s;
1614
1615 #if defined( SJCD_TRACE )
1616         printk("SJCD: release\n");
1617 #endif
1618         if (--sjcd_open_count == 0) {
1619                 sjcd_invalidate_buffers();
1620                 s = sjcd_tray_unlock();
1621                 if (s < 0 || !sjcd_status_valid || sjcd_command_failed) {
1622 #if defined( SJCD_DIAGNOSTIC )
1623                         printk
1624                             ("SJCD: release: tray unlock attempt failed.\n");
1625 #endif
1626                 }
1627                 if (sjcd_door_was_open) {
1628                         s = sjcd_tray_open();
1629                         if (s < 0 || !sjcd_status_valid
1630                             || sjcd_command_failed) {
1631 #if defined( SJCD_DIAGNOSTIC )
1632                                 printk
1633                                     ("SJCD: release: tray unload attempt failed.\n");
1634 #endif
1635                         }
1636                 }
1637         }
1638         return 0;
1639 }
1640
1641 /*
1642  * A list of file operations allowed for this cdrom.
1643  */
1644 static struct block_device_operations sjcd_fops = {
1645         .owner          = THIS_MODULE,
1646         .open           = sjcd_open,
1647         .release        = sjcd_release,
1648         .ioctl          = sjcd_ioctl,
1649         .media_changed  = sjcd_disk_change,
1650 };
1651
1652 /*
1653  * Following stuff is intended for initialization of the cdrom. It
1654  * first looks for presence of device. If the device is present, it
1655  * will be reset. Then read the version of the drive and load status.
1656  * The version is two BCD-coded bytes.
1657  */
1658 static struct {
1659         unsigned char major, minor;
1660 } sjcd_version;
1661
1662 static struct gendisk *sjcd_disk;
1663
1664 /*
1665  * Test for presence of drive and initialize it. Called at boot time.
1666  * Probe cdrom, find out version and status.
1667  */
1668 static int __init sjcd_init(void)
1669 {
1670         int i;
1671
1672         printk(KERN_INFO
1673                "SJCD: Sanyo CDR-H94A cdrom driver version %d.%d.\n",
1674                SJCD_VERSION_MAJOR, SJCD_VERSION_MINOR);
1675
1676 #if defined( SJCD_TRACE )
1677         printk("SJCD: sjcd=0x%x: ", sjcd_base);
1678 #endif
1679
1680         if (register_blkdev(MAJOR_NR, "sjcd"))
1681                 return -EIO;
1682
1683         sjcd_queue = blk_init_queue(do_sjcd_request, &sjcd_lock);
1684         if (!sjcd_queue)
1685                 goto out0;
1686
1687         blk_queue_hardsect_size(sjcd_queue, 2048);
1688
1689         sjcd_disk = alloc_disk(1);
1690         if (!sjcd_disk) {
1691                 printk(KERN_ERR "SJCD: can't allocate disk");
1692                 goto out1;
1693         }
1694         sjcd_disk->major = MAJOR_NR,
1695         sjcd_disk->first_minor = 0,
1696         sjcd_disk->fops = &sjcd_fops,
1697         sprintf(sjcd_disk->disk_name, "sjcd");
1698         sprintf(sjcd_disk->devfs_name, "sjcd");
1699
1700         if (!request_region(sjcd_base, 4,"sjcd")) {
1701                 printk
1702                     ("SJCD: Init failed, I/O port (%X) is already in use\n",
1703                      sjcd_base);
1704                 goto out2;
1705         }
1706
1707         /*
1708          * Check for card. Since we are booting now, we can't use standard
1709          * wait algorithm.
1710          */
1711         printk(KERN_INFO "SJCD: Resetting: ");
1712         sjcd_send_cmd(SCMD_RESET);
1713         for (i = 1000; i > 0 && !sjcd_status_valid; --i) {
1714                 unsigned long timer;
1715
1716                 /*
1717                  * Wait 10ms approx.
1718                  */
1719                 for (timer = jiffies; time_before_eq(jiffies, timer););
1720                 if ((i % 100) == 0)
1721                         printk(".");
1722                 (void) sjcd_check_status();
1723         }
1724         if (i == 0 || sjcd_command_failed) {
1725                 printk(" reset failed, no drive found.\n");
1726                 goto out3;
1727         } else
1728                 printk("\n");
1729
1730         /*
1731          * Get and print out cdrom version.
1732          */
1733         printk(KERN_INFO "SJCD: Getting version: ");
1734         sjcd_send_cmd(SCMD_GET_VERSION);
1735         for (i = 1000; i > 0 && !sjcd_status_valid; --i) {
1736                 unsigned long timer;
1737
1738                 /*
1739                  * Wait 10ms approx.
1740                  */
1741                 for (timer = jiffies; time_before_eq(jiffies, timer););
1742                 if ((i % 100) == 0)
1743                         printk(".");
1744                 (void) sjcd_check_status();
1745         }
1746         if (i == 0 || sjcd_command_failed) {
1747                 printk(" get version failed, no drive found.\n");
1748                 goto out3;
1749         }
1750
1751         if (sjcd_load_response(&sjcd_version, sizeof(sjcd_version)) == 0) {
1752                 printk(" %1x.%02x\n", (int) sjcd_version.major,
1753                        (int) sjcd_version.minor);
1754         } else {
1755                 printk(" read version failed, no drive found.\n");
1756                 goto out3;
1757         }
1758
1759         /*
1760          * Check and print out the tray state. (if it is needed?).
1761          */
1762         if (!sjcd_status_valid) {
1763                 printk(KERN_INFO "SJCD: Getting status: ");
1764                 sjcd_send_cmd(SCMD_GET_STATUS);
1765                 for (i = 1000; i > 0 && !sjcd_status_valid; --i) {
1766                         unsigned long timer;
1767
1768                         /*
1769                          * Wait 10ms approx.
1770                          */
1771                         for (timer = jiffies;
1772                              time_before_eq(jiffies, timer););
1773                         if ((i % 100) == 0)
1774                                 printk(".");
1775                         (void) sjcd_check_status();
1776                 }
1777                 if (i == 0 || sjcd_command_failed) {
1778                         printk(" get status failed, no drive found.\n");
1779                         goto out3;
1780                 } else
1781                         printk("\n");
1782         }
1783
1784         printk(KERN_INFO "SJCD: Status: port=0x%x.\n", sjcd_base);
1785         sjcd_disk->queue = sjcd_queue;
1786         add_disk(sjcd_disk);
1787
1788         sjcd_present++;
1789         return (0);
1790 out3:
1791         release_region(sjcd_base, 4);
1792 out2:
1793         put_disk(sjcd_disk);
1794 out1:
1795         blk_cleanup_queue(sjcd_queue);
1796 out0:
1797         if ((unregister_blkdev(MAJOR_NR, "sjcd") == -EINVAL))
1798                 printk("SJCD: cannot unregister device.\n");
1799         return (-EIO);
1800 }
1801
1802 static void __exit sjcd_exit(void)
1803 {
1804         del_gendisk(sjcd_disk);
1805         put_disk(sjcd_disk);
1806         release_region(sjcd_base, 4);
1807         blk_cleanup_queue(sjcd_queue);
1808         if ((unregister_blkdev(MAJOR_NR, "sjcd") == -EINVAL))
1809                 printk("SJCD: cannot unregister device.\n");
1810         printk(KERN_INFO "SJCD: module: removed.\n");
1811 }
1812
1813 module_init(sjcd_init);
1814 module_exit(sjcd_exit);
1815
1816 MODULE_LICENSE("GPL");
1817 MODULE_ALIAS_BLOCKDEV_MAJOR(SANYO_CDROM_MAJOR);