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