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1/*
2 * Sony CDU-535 interface device driver
3 *
4 * This is a modified version of the CDU-31A device driver (see below).
5 * Changes were made using documentation for the CDU-531 (which Sony
6 * assures me is very similar to the 535) and partial disassembly of the
7 * DOS driver. I used Minyard's driver and replaced the CDU-31A
8 * commands with the CDU-531 commands. This was complicated by a different
9 * interface protocol with the drive. The driver is still polled.
10 *
11 * Data transfer rate is about 110 Kb/sec, theoretical maximum is 150 Kb/sec.
12 * I tried polling without the sony_sleep during the data transfers but
13 * it did not speed things up any.
14 *
15 * 1993-05-23 (rgj) changed the major number to 21 to get rid of conflict
16 * with CDU-31A driver. This is the also the number from the Linux
17 * Device Driver Registry for the Sony Drive. Hope nobody else is using it.
18 *
19 * 1993-08-29 (rgj) remove the configuring of the interface board address
20 * from the top level configuration, you have to modify it in this file.
21 *
22 * 1995-01-26 Made module-capable (Joel Katz <Stimpson@Panix.COM>)
23 *
24 * 1995-05-20
25 * Modified to support CDU-510/515 series
26 * (Claudio Porfiri<C.Porfiri@nisms.tei.ericsson.se>)
27 * Fixed to report verify_area() failures
28 * (Heiko Eissfeldt <heiko@colossus.escape.de>)
29 *
30 * 1995-06-01
31 * More changes to support CDU-510/515 series
32 * (Claudio Porfiri<C.Porfiri@nisms.tei.ericsson.se>)
33 *
34 * November 1999 -- Make kernel-parameter implementation work with 2.3.x
35 * Removed init_module & cleanup_module in favor of
36 * module_init & module_exit.
37 * Torben Mathiasen <tmm@image.dk>
38 *
39 * September 2003 - Fix SMP support by removing cli/sti calls.
40 * Using spinlocks with a wait_queue instead.
41 * Felipe Damasio <felipewd@terra.com.br>
42 *
43 * Things to do:
44 * - handle errors and status better, put everything into a single word
45 * - use interrupts (code mostly there, but a big hole still missing)
46 * - handle multi-session CDs?
47 * - use DMA?
48 *
49 * Known Bugs:
50 * -
51 *
52 * Ken Pizzini (ken@halcyon.com)
53 *
54 * Original by:
55 * Ron Jeppesen (ronj.an@site007.saic.com)
56 *
57 *
58 *------------------------------------------------------------------------
59 * Sony CDROM interface device driver.
60 *
61 * Corey Minyard (minyard@wf-rch.cirr.com) (CDU-535 complaints to Ken above)
62 *
63 * Colossians 3:17
64 *
65 * The Sony interface device driver handles Sony interface CDROM
66 * drives and provides a complete block-level interface as well as an
67 * ioctl() interface compatible with the Sun (as specified in
68 * include/linux/cdrom.h). With this interface, CDROMs can be
69 * accessed and standard audio CDs can be played back normally.
70 *
71 * This interface is (unfortunately) a polled interface. This is
72 * because most Sony interfaces are set up with DMA and interrupts
73 * disables. Some (like mine) do not even have the capability to
74 * handle interrupts or DMA. For this reason you will see a bit of
75 * the following:
76 *
77 * snap = jiffies;
78 * while (jiffies-snap < SONY_JIFFIES_TIMEOUT)
79 * {
80 * if (some_condition())
81 * break;
82 * sony_sleep();
83 * }
84 * if (some_condition not met)
85 * {
86 * return an_error;
87 * }
88 *
89 * This ugly hack waits for something to happen, sleeping a little
90 * between every try. (The conditional is written so that jiffies
91 * wrap-around is handled properly.)
92 *
93 * One thing about these drives: They talk in MSF (Minute Second Frame) format.
94 * There are 75 frames a second, 60 seconds a minute, and up to 75 minutes on a
95 * disk. The funny thing is that these are sent to the drive in BCD, but the
96 * interface wants to see them in decimal. A lot of conversion goes on.
97 *
98 * Copyright (C) 1993 Corey Minyard
99 *
100 * This program is free software; you can redistribute it and/or modify
101 * it under the terms of the GNU General Public License as published by
102 * the Free Software Foundation; either version 2 of the License, or
103 * (at your option) any later version.
104 *
105 * This program is distributed in the hope that it will be useful,
106 * but WITHOUT ANY WARRANTY; without even the implied warranty of
107 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
108 * GNU General Public License for more details.
109 *
110 * You should have received a copy of the GNU General Public License
111 * along with this program; if not, write to the Free Software
112 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
113 *
114 */
115
116
117# include <linux/module.h>
118
119#include <linux/errno.h>
120#include <linux/signal.h>
121#include <linux/sched.h>
122#include <linux/timer.h>
123#include <linux/fs.h>
124#include <linux/kernel.h>
125#include <linux/interrupt.h>
126#include <linux/ioport.h>
127#include <linux/hdreg.h>
128#include <linux/genhd.h>
129#include <linux/mm.h>
130#include <linux/slab.h>
131#include <linux/init.h>
132
133#define REALLY_SLOW_IO
134#include <asm/system.h>
135#include <asm/io.h>
136#include <asm/uaccess.h>
137
138#include <linux/cdrom.h>
139
140#define MAJOR_NR CDU535_CDROM_MAJOR
141#include <linux/blkdev.h>
142
143#define sony535_cd_base_io sonycd535 /* for compatible parameter passing with "insmod" */
144#include "sonycd535.h"
145
146/*
147 * this is the base address of the interface card for the Sony CDU-535
148 * CDROM drive. If your jumpers are set for an address other than
149 * this one (the default), change the following line to the
150 * proper address.
151 */
152#ifndef CDU535_ADDRESS
153# define CDU535_ADDRESS 0x340
154#endif
155#ifndef CDU535_INTERRUPT
156# define CDU535_INTERRUPT 0
157#endif
158#ifndef CDU535_HANDLE
159# define CDU535_HANDLE "cdu535"
160#endif
161#ifndef CDU535_MESSAGE_NAME
162# define CDU535_MESSAGE_NAME "Sony CDU-535"
163#endif
164
165#define CDU535_BLOCK_SIZE 2048
166
167#ifndef MAX_SPINUP_RETRY
168# define MAX_SPINUP_RETRY 3 /* 1 is sufficient for most drives... */
169#endif
170#ifndef RETRY_FOR_BAD_STATUS
171# define RETRY_FOR_BAD_STATUS 100 /* in 10th of second */
172#endif
173
174#ifndef DEBUG
175# define DEBUG 1
176#endif
177
178/*
179 * SONY535_BUFFER_SIZE determines the size of internal buffer used
180 * by the drive. It must be at least 2K and the larger the buffer
181 * the better the transfer rate. It does however take system memory.
182 * On my system I get the following transfer rates using dd to read
183 * 10 Mb off /dev/cdrom.
184 *
185 * 8K buffer 43 Kb/sec
186 * 16K buffer 66 Kb/sec
187 * 32K buffer 91 Kb/sec
188 * 64K buffer 111 Kb/sec
189 * 128K buffer 123 Kb/sec
190 * 512K buffer 123 Kb/sec
191 */
192#define SONY535_BUFFER_SIZE (64*1024)
193
194/*
195 * if LOCK_DOORS is defined then the eject button is disabled while
196 * the device is open.
197 */
198#ifndef NO_LOCK_DOORS
199# define LOCK_DOORS
200#endif
201
202static int read_subcode(void);
203static void sony_get_toc(void);
204static int cdu_open(struct inode *inode, struct file *filp);
205static inline unsigned int int_to_bcd(unsigned int val);
206static unsigned int bcd_to_int(unsigned int bcd);
207static int do_sony_cmd(Byte * cmd, int nCmd, Byte status[2],
208 Byte * response, int n_response, int ignoreStatusBit7);
209
210/* The base I/O address of the Sony Interface. This is a variable (not a
211 #define) so it can be easily changed via some future ioctl() */
212static unsigned int sony535_cd_base_io = CDU535_ADDRESS;
213module_param(sony535_cd_base_io, int, 0);
214
215/*
216 * The following are I/O addresses of the various registers for the drive. The
217 * comment for the base address also applies here.
218 */
219static unsigned short select_unit_reg;
220static unsigned short result_reg;
221static unsigned short command_reg;
222static unsigned short read_status_reg;
223static unsigned short data_reg;
224
225static DEFINE_SPINLOCK(sonycd535_lock); /* queue lock */
226static struct request_queue *sonycd535_queue;
227
228static int initialized; /* Has the drive been initialized? */
229static int sony_disc_changed = 1; /* Has the disk been changed
230 since the last check? */
231static int sony_toc_read; /* Has the table of contents been
232 read? */
233static unsigned int sony_buffer_size; /* Size in bytes of the read-ahead
234 buffer. */
235static unsigned int sony_buffer_sectors; /* Size (in 2048 byte records) of
236 the read-ahead buffer. */
237static unsigned int sony_usage; /* How many processes have the
238 drive open. */
239
240static int sony_first_block = -1; /* First OS block (512 byte) in
241 the read-ahead buffer */
242static int sony_last_block = -1; /* Last OS block (512 byte) in
243 the read-ahead buffer */
244
245static struct s535_sony_toc *sony_toc; /* Points to the table of
246 contents. */
247
248static struct s535_sony_subcode *last_sony_subcode; /* Points to the last
249 subcode address read */
250static Byte **sony_buffer; /* Points to the pointers
251 to the sector buffers */
252
253static int sony_inuse; /* is the drive in use? Only one
254 open at a time allowed */
255
256/*
257 * The audio status uses the values from read subchannel data as specified
258 * in include/linux/cdrom.h.
259 */
260static int sony_audio_status = CDROM_AUDIO_NO_STATUS;
261
262/*
263 * The following are a hack for pausing and resuming audio play. The drive
264 * does not work as I would expect it, if you stop it then start it again,
265 * the drive seeks back to the beginning and starts over. This holds the
266 * position during a pause so a resume can restart it. It uses the
267 * audio status variable above to tell if it is paused.
268 * I just kept the CDU-31A driver behavior rather than using the PAUSE
269 * command on the CDU-535.
270 */
271static Byte cur_pos_msf[3];
272static Byte final_pos_msf[3];
273
274/* What IRQ is the drive using? 0 if none. */
275static int sony535_irq_used = CDU535_INTERRUPT;
276
277/* The interrupt handler will wake this queue up when it gets an interrupt. */
278static DECLARE_WAIT_QUEUE_HEAD(cdu535_irq_wait);
279
280
281/*
282 * This routine returns 1 if the disk has been changed since the last
283 * check or 0 if it hasn't. Setting flag to 0 resets the changed flag.
284 */
285static int
286cdu535_check_media_change(struct gendisk *disk)
287{
288 /* if driver is not initialized, always return 0 */
289 int retval = initialized ? sony_disc_changed : 0;
290 sony_disc_changed = 0;
291 return retval;
292}
293
294static inline void
295enable_interrupts(void)
296{
297#ifdef USE_IRQ
298 /*
299 * This code was taken from cdu31a.c; it will not
300 * directly work for the cdu535 as written...
301 */
302 curr_control_reg |= ( SONY_ATTN_INT_EN_BIT
303 | SONY_RES_RDY_INT_EN_BIT
304 | SONY_DATA_RDY_INT_EN_BIT);
305 outb(curr_control_reg, sony_cd_control_reg);
306#endif
307}
308
309static inline void
310disable_interrupts(void)
311{
312#ifdef USE_IRQ
313 /*
314 * This code was taken from cdu31a.c; it will not
315 * directly work for the cdu535 as written...
316 */
317 curr_control_reg &= ~(SONY_ATTN_INT_EN_BIT
318 | SONY_RES_RDY_INT_EN_BIT
319 | SONY_DATA_RDY_INT_EN_BIT);
320 outb(curr_control_reg, sony_cd_control_reg);
321#endif
322}
323
324static irqreturn_t
325cdu535_interrupt(int irq, void *dev_id)
326{
327 disable_interrupts();
328 if (waitqueue_active(&cdu535_irq_wait)) {
329 wake_up(&cdu535_irq_wait);
330 return IRQ_HANDLED;
331 }
332 printk(CDU535_MESSAGE_NAME
333 ": Got an interrupt but nothing was waiting\n");
334 return IRQ_NONE;
335}
336
337
338/*
339 * Wait a little while.
340 */
341static inline void
342sony_sleep(void)
343{
344 if (sony535_irq_used <= 0) { /* poll */
345 yield();
346 } else { /* Interrupt driven */
347 DEFINE_WAIT(wait);
348
349 spin_lock_irq(&sonycd535_lock);
350 enable_interrupts();
351 prepare_to_wait(&cdu535_irq_wait, &wait, TASK_INTERRUPTIBLE);
352 spin_unlock_irq(&sonycd535_lock);
353 schedule();
354 finish_wait(&cdu535_irq_wait, &wait);
355 }
356}
357
358/*------------------start of SONY CDU535 very specific ---------------------*/
359
360/****************************************************************************
361 * void select_unit( int unit_no )
362 *
363 * Select the specified unit (0-3) so that subsequent commands reference it
364 ****************************************************************************/
365static void
366select_unit(int unit_no)
367{
368 unsigned int select_mask = ~(1 << unit_no);
369 outb(select_mask, select_unit_reg);
370}
371
372/***************************************************************************
373 * int read_result_reg( Byte *data_ptr )
374 *
375 * Read a result byte from the Sony CDU controller, store in location pointed
376 * to by data_ptr. Return zero on success, TIME_OUT if we did not receive
377 * data.
378 ***************************************************************************/
379static int
380read_result_reg(Byte *data_ptr)
381{
382 unsigned long snap;
383 int read_status;
384
385 snap = jiffies;
386 while (jiffies-snap < SONY_JIFFIES_TIMEOUT) {
387 read_status = inb(read_status_reg);
388 if ((read_status & SONY535_RESULT_NOT_READY_BIT) == 0) {
389#if DEBUG > 1
390 printk(CDU535_MESSAGE_NAME
391 ": read_result_reg(): readStatReg = 0x%x\n", read_status);
392#endif
393 *data_ptr = inb(result_reg);
394 return 0;
395 } else {
396 sony_sleep();
397 }
398 }
399 printk(CDU535_MESSAGE_NAME " read_result_reg: TIME OUT!\n");
400 return TIME_OUT;
401}
402
403/****************************************************************************
404 * int read_exec_status( Byte status[2] )
405 *
406 * Read the execution status of the last command and put into status.
407 * Handles reading second status word if available. Returns 0 on success,
408 * TIME_OUT on failure.
409 ****************************************************************************/
410static int
411read_exec_status(Byte status[2])
412{
413 status[1] = 0;
414 if (read_result_reg(&(status[0])) != 0)
415 return TIME_OUT;
416 if ((status[0] & 0x80) != 0) { /* byte two follows */
417 if (read_result_reg(&(status[1])) != 0)
418 return TIME_OUT;
419 }
420#if DEBUG > 1
421 printk(CDU535_MESSAGE_NAME ": read_exec_status: read 0x%x 0x%x\n",
422 status[0], status[1]);
423#endif
424 return 0;
425}
426
427/****************************************************************************
428 * int check_drive_status( void )
429 *
430 * Check the current drive status. Using this before executing a command
431 * takes care of the problem of unsolicited drive status-2 messages.
432 * Add a check of the audio status if we think the disk is playing.
433 ****************************************************************************/
434static int
435check_drive_status(void)
436{
437 Byte status, e_status[2];
438 int CDD, ATN;
439 Byte cmd;
440
441 select_unit(0);
442 if (sony_audio_status == CDROM_AUDIO_PLAY) { /* check status */
443 outb(SONY535_REQUEST_AUDIO_STATUS, command_reg);
444 if (read_result_reg(&status) == 0) {
445 switch (status) {
446 case 0x0:
447 break; /* play in progress */
448 case 0x1:
449 break; /* paused */
450 case 0x3: /* audio play completed */
451 case 0x5: /* play not requested */
452 sony_audio_status = CDROM_AUDIO_COMPLETED;
453 read_subcode();
454 break;
455 case 0x4: /* error during play */
456 sony_audio_status = CDROM_AUDIO_ERROR;
457 break;
458 }
459 }
460 }
461 /* now check drive status */
462 outb(SONY535_REQUEST_DRIVE_STATUS_2, command_reg);
463 if (read_result_reg(&status) != 0)
464 return TIME_OUT;
465
466#if DEBUG > 1
467 printk(CDU535_MESSAGE_NAME ": check_drive_status() got 0x%x\n", status);
468#endif
469
470 if (status == 0)
471 return 0;
472
473 ATN = status & 0xf;
474 CDD = (status >> 4) & 0xf;
475
476 switch (ATN) {
477 case 0x0:
478 break; /* go on to CDD stuff */
479 case SONY535_ATN_BUSY:
480 if (initialized)
481 printk(CDU535_MESSAGE_NAME " error: drive busy\n");
482 return CD_BUSY;
483 case SONY535_ATN_EJECT_IN_PROGRESS:
484 printk(CDU535_MESSAGE_NAME " error: eject in progress\n");
485 sony_audio_status = CDROM_AUDIO_INVALID;
486 return CD_BUSY;
487 case SONY535_ATN_RESET_OCCURRED:
488 case SONY535_ATN_DISC_CHANGED:
489 case SONY535_ATN_RESET_AND_DISC_CHANGED:
490#if DEBUG > 0
491 printk(CDU535_MESSAGE_NAME " notice: reset occurred or disc changed\n");
492#endif
493 sony_disc_changed = 1;
494 sony_toc_read = 0;
495 sony_audio_status = CDROM_AUDIO_NO_STATUS;
496 sony_first_block = -1;
497 sony_last_block = -1;
498 if (initialized) {
499 cmd = SONY535_SPIN_UP;
500 do_sony_cmd(&cmd, 1, e_status, NULL, 0, 0);
501 sony_get_toc();
502 }
503 return 0;
504 default:
505 printk(CDU535_MESSAGE_NAME " error: drive busy (ATN=0x%x)\n", ATN);
506 return CD_BUSY;
507 }
508 switch (CDD) { /* the 531 docs are not helpful in decoding this */
509 case 0x0: /* just use the values from the DOS driver */
510 case 0x2:
511 case 0xa:
512 break; /* no error */
513 case 0xc:
514 printk(CDU535_MESSAGE_NAME
515 ": check_drive_status(): CDD = 0xc! Not properly handled!\n");
516 return CD_BUSY; /* ? */
517 default:
518 return CD_BUSY;
519 }
520 return 0;
521} /* check_drive_status() */
522
523/*****************************************************************************
524 * int do_sony_cmd( Byte *cmd, int n_cmd, Byte status[2],
525 * Byte *response, int n_response, int ignore_status_bit7 )
526 *
527 * Generic routine for executing commands. The command and its parameters
528 * should be placed in the cmd[] array, number of bytes in the command is
529 * stored in nCmd. The response from the command will be stored in the
530 * response array. The number of bytes you expect back (excluding status)
531 * should be passed in n_response. Finally, some
532 * commands set bit 7 of the return status even when there is no second
533 * status byte, on these commands set ignoreStatusBit7 TRUE.
534 * If the command was sent and data received back, then we return 0,
535 * else we return TIME_OUT. You still have to check the status yourself.
536 * You should call check_drive_status() before calling this routine
537 * so that you do not lose notifications of disk changes, etc.
538 ****************************************************************************/
539static int
540do_sony_cmd(Byte * cmd, int n_cmd, Byte status[2],
541 Byte * response, int n_response, int ignore_status_bit7)
542{
543 int i;
544
545 /* write out the command */
546 for (i = 0; i < n_cmd; i++)
547 outb(cmd[i], command_reg);
548
549 /* read back the status */
550 if (read_result_reg(status) != 0)
551 return TIME_OUT;
552 if (!ignore_status_bit7 && ((status[0] & 0x80) != 0)) {
553 /* get second status byte */
554 if (read_result_reg(status + 1) != 0)
555 return TIME_OUT;
556 } else {
557 status[1] = 0;
558 }
559#if DEBUG > 2
560 printk(CDU535_MESSAGE_NAME ": do_sony_cmd %x: %x %x\n",
561 *cmd, status[0], status[1]);
562#endif
563
564 /* do not know about when I should read set of data and when not to */
565 if ((status[0] & ((ignore_status_bit7 ? 0x7f : 0xff) & 0x8f)) != 0)
566 return 0;
567
568 /* else, read in rest of data */
569 for (i = 0; 0 < n_response; n_response--, i++)
570 if (read_result_reg(response + i) != 0)
571 return TIME_OUT;
572 return 0;
573} /* do_sony_cmd() */
574
575/**************************************************************************
576 * int set_drive_mode( int mode, Byte status[2] )
577 *
578 * Set the drive mode to the specified value (mode=0 is audio, mode=e0
579 * is mode-1 CDROM
580 **************************************************************************/
581static int
582set_drive_mode(int mode, Byte status[2])
583{
584 Byte cmd_buff[2];
585 Byte ret_buff[1];
586
587 cmd_buff[0] = SONY535_SET_DRIVE_MODE;
588 cmd_buff[1] = mode;
589 return do_sony_cmd(cmd_buff, 2, status, ret_buff, 1, 1);
590}
591
592/***************************************************************************
593 * int seek_and_read_N_blocks( Byte params[], int n_blocks, Byte status[2],
594 * Byte *data_buff, int buff_size )
595 *
596 * Read n_blocks of data from the CDROM starting at position params[0:2],
597 * number of blocks in stored in params[3:5] -- both these are already
598 * int bcd format.
599 * Transfer the data into the buffer pointed at by data_buff. buff_size
600 * gives the number of bytes available in the buffer.
601 * The routine returns number of bytes read in if successful, otherwise
602 * it returns one of the standard error returns.
603 ***************************************************************************/
604static int
605seek_and_read_N_blocks(Byte params[], int n_blocks, Byte status[2],
606 Byte **buff, int buf_size)
607{
608 Byte cmd_buff[7];
609 int i;
610 int read_status;
611 unsigned long snap;
612 Byte *data_buff;
613 int sector_count = 0;
614
615 if (buf_size < CDU535_BLOCK_SIZE * n_blocks)
616 return NO_ROOM;
617
618 set_drive_mode(SONY535_CDROM_DRIVE_MODE, status);
619
620 /* send command to read the data */
621 cmd_buff[0] = SONY535_SEEK_AND_READ_N_BLOCKS_1;
622 for (i = 0; i < 6; i++)
623 cmd_buff[i + 1] = params[i];
624 for (i = 0; i < 7; i++)
625 outb(cmd_buff[i], command_reg);
626
627 /* read back the data one block at a time */
628 while (0 < n_blocks--) {
629 /* wait for data to be ready */
630 int data_valid = 0;
631 snap = jiffies;
632 while (jiffies-snap < SONY_JIFFIES_TIMEOUT) {
633 read_status = inb(read_status_reg);
634 if ((read_status & SONY535_RESULT_NOT_READY_BIT) == 0) {
635 read_exec_status(status);
636 return BAD_STATUS;
637 }
638 if ((read_status & SONY535_DATA_NOT_READY_BIT) == 0) {
639 /* data is ready, read it */
640 data_buff = buff[sector_count++];
641 for (i = 0; i < CDU535_BLOCK_SIZE; i++)
642 *data_buff++ = inb(data_reg); /* unrolling this loop does not seem to help */
643 data_valid = 1;
644 break; /* exit the timeout loop */
645 }
646 sony_sleep(); /* data not ready, sleep a while */
647 }
648 if (!data_valid)
649 return TIME_OUT; /* if we reach this stage */
650 }
651
652 /* read all the data, now read the status */
653 if ((i = read_exec_status(status)) != 0)
654 return i;
655 return CDU535_BLOCK_SIZE * sector_count;
656} /* seek_and_read_N_blocks() */
657
658/****************************************************************************
659 * int request_toc_data( Byte status[2], struct s535_sony_toc *toc )
660 *
661 * Read in the table of contents data. Converts all the bcd data
662 * into integers in the toc structure.
663 ****************************************************************************/
664static int
665request_toc_data(Byte status[2], struct s535_sony_toc *toc)
666{
667 int to_status;
668 int i, j, n_tracks, track_no;
669 int first_track_num, last_track_num;
670 Byte cmd_no = 0xb2;
671 Byte track_address_buffer[5];
672
673 /* read the fixed portion of the table of contents */
674 if ((to_status = do_sony_cmd(&cmd_no, 1, status, (Byte *) toc, 15, 1)) != 0)
675 return to_status;
676
677 /* convert the data into integers so we can use them */
678 first_track_num = bcd_to_int(toc->first_track_num);
679 last_track_num = bcd_to_int(toc->last_track_num);
680 n_tracks = last_track_num - first_track_num + 1;
681
682 /* read each of the track address descriptors */
683 for (i = 0; i < n_tracks; i++) {
684 /* read the descriptor into a temporary buffer */
685 for (j = 0; j < 5; j++) {
686 if (read_result_reg(track_address_buffer + j) != 0)
687 return TIME_OUT;
688 if (j == 1) /* need to convert from bcd */
689 track_no = bcd_to_int(track_address_buffer[j]);
690 }
691 /* copy the descriptor to proper location - sonycd.c just fills */
692 memcpy(toc->tracks + i, track_address_buffer, 5);
693 }
694 return 0;
695} /* request_toc_data() */
696
697/***************************************************************************
698 * int spin_up_drive( Byte status[2] )
699 *
700 * Spin up the drive (unless it is already spinning).
701 ***************************************************************************/
702static int
703spin_up_drive(Byte status[2])
704{
705 Byte cmd;
706
707 /* first see if the drive is already spinning */
708 cmd = SONY535_REQUEST_DRIVE_STATUS_1;
709 if (do_sony_cmd(&cmd, 1, status, NULL, 0, 0) != 0)
710 return TIME_OUT;
711 if ((status[0] & SONY535_STATUS1_NOT_SPINNING) == 0)
712 return 0; /* it's already spinning */
713
714 /* otherwise, give the spin-up command */
715 cmd = SONY535_SPIN_UP;
716 return do_sony_cmd(&cmd, 1, status, NULL, 0, 0);
717}
718
719/*--------------------end of SONY CDU535 very specific ---------------------*/
720
721/* Convert from an integer 0-99 to BCD */
722static inline unsigned int
723int_to_bcd(unsigned int val)
724{
725 int retval;
726
727 retval = (val / 10) << 4;
728 retval = retval | val % 10;
729 return retval;
730}
731
732
733/* Convert from BCD to an integer from 0-99 */
734static unsigned int
735bcd_to_int(unsigned int bcd)
736{
737 return (((bcd >> 4) & 0x0f) * 10) + (bcd & 0x0f);
738}
739
740
741/*
742 * Convert a logical sector value (like the OS would want to use for
743 * a block device) to an MSF format.
744 */
745static void
746log_to_msf(unsigned int log, Byte *msf)
747{
748 log = log + LOG_START_OFFSET;
749 msf[0] = int_to_bcd(log / 4500);
750 log = log % 4500;
751 msf[1] = int_to_bcd(log / 75);
752 msf[2] = int_to_bcd(log % 75);
753}
754
755
756/*
757 * Convert an MSF format to a logical sector.
758 */
759static unsigned int
760msf_to_log(Byte *msf)
761{
762 unsigned int log;
763
764
765 log = bcd_to_int(msf[2]);
766 log += bcd_to_int(msf[1]) * 75;
767 log += bcd_to_int(msf[0]) * 4500;
768 log = log - LOG_START_OFFSET;
769
770 return log;
771}
772
773
774/*
775 * Take in integer size value and put it into a buffer like
776 * the drive would want to see a number-of-sector value.
777 */
778static void
779size_to_buf(unsigned int size, Byte *buf)
780{
781 buf[0] = size / 65536;
782 size = size % 65536;
783 buf[1] = size / 256;
784 buf[2] = size % 256;
785}
786
787
788/*
789 * The OS calls this to perform a read or write operation to the drive.
790 * Write obviously fail. Reads to a read ahead of sony_buffer_size
791 * bytes to help speed operations. This especially helps since the OS
792 * may use 1024 byte blocks and the drive uses 2048 byte blocks. Since most
793 * data access on a CD is done sequentially, this saves a lot of operations.
794 */
795static void
796do_cdu535_request(request_queue_t * q)
797{
798 struct request *req;
799 unsigned int read_size;
800 int block;
801 int nsect;
802 int copyoff;
803 int spin_up_retry;
804 Byte params[10];
805 Byte status[2];
806 Byte cmd[2];
807
808 while (1) {
809 req = elv_next_request(q);
810 if (!req)
811 return;
812
813 block = req->sector;
814 nsect = req->nr_sectors;
815 if (!blk_fs_request(req)) {
816 end_request(req, 0);
817 continue;
818 }
819 if (rq_data_dir(req) == WRITE) {
820 end_request(req, 0);
821 continue;
822 }
823 /*
824 * If the block address is invalid or the request goes beyond
825 * the end of the media, return an error.
826 */
827 if (sony_toc->lead_out_start_lba <= (block/4)) {
828 end_request(req, 0);
829 return;
830 }
831 if (sony_toc->lead_out_start_lba <= ((block + nsect) / 4)) {
832 end_request(req, 0);
833 return;
834 }
835 while (0 < nsect) {
836 /*
837 * If the requested sector is not currently in
838 * the read-ahead buffer, it must be read in.
839 */
840 if ((block < sony_first_block) || (sony_last_block < block)) {
841 sony_first_block = (block / 4) * 4;
842 log_to_msf(block / 4, params);
843
844 /*
845 * If the full read-ahead would go beyond the end of the media, trim
846 * it back to read just till the end of the media.
847 */
848 if (sony_toc->lead_out_start_lba <= ((block / 4) + sony_buffer_sectors)) {
849 sony_last_block = (sony_toc->lead_out_start_lba * 4) - 1;
850 read_size = sony_toc->lead_out_start_lba - (block / 4);
851 } else {
852 sony_last_block = sony_first_block + (sony_buffer_sectors * 4) - 1;
853 read_size = sony_buffer_sectors;
854 }
855 size_to_buf(read_size, &params[3]);
856
857 /*
858 * Read the data. If the drive was not spinning,
859 * spin it up and try some more.
860 */
861 for (spin_up_retry=0 ;; ++spin_up_retry) {
862 /* This loop has been modified to support the Sony
863 * CDU-510/515 series, thanks to Claudio Porfiri
864 * <C.Porfiri@nisms.tei.ericsson.se>.
865 */
866 /*
867 * This part is to deal with very slow hardware. We
868 * try at most MAX_SPINUP_RETRY times to read the same
869 * block. A check for seek_and_read_N_blocks' result is
870 * performed; if the result is wrong, the CDROM's engine
871 * is restarted and the operation is tried again.
872 */
873 /*
874 * 1995-06-01: The system got problems when downloading
875 * from Slackware CDROM, the problem seems to be:
876 * seek_and_read_N_blocks returns BAD_STATUS and we
877 * should wait for a while before retrying, so a new
878 * part was added to discriminate the return value from
879 * seek_and_read_N_blocks for the various cases.
880 */
881 int readStatus = seek_and_read_N_blocks(params, read_size,
882 status, sony_buffer, (read_size * CDU535_BLOCK_SIZE));
883 if (0 <= readStatus) /* Good data; common case, placed first */
884 break;
885 if (readStatus == NO_ROOM || spin_up_retry == MAX_SPINUP_RETRY) {
886 /* give up */
887 if (readStatus == NO_ROOM)
888 printk(CDU535_MESSAGE_NAME " No room to read from CD\n");
889 else
890 printk(CDU535_MESSAGE_NAME " Read error: 0x%.2x\n",
891 status[0]);
892 sony_first_block = -1;
893 sony_last_block = -1;
894 end_request(req, 0);
895 return;
896 }
897 if (readStatus == BAD_STATUS) {
898 /* Sleep for a while, then retry */
899 set_current_state(TASK_INTERRUPTIBLE);
900 spin_unlock_irq(&sonycd535_lock);
901 schedule_timeout(RETRY_FOR_BAD_STATUS*HZ/10);
902 spin_lock_irq(&sonycd535_lock);
903 }
904#if DEBUG > 0
905 printk(CDU535_MESSAGE_NAME
906 " debug: calling spin up when reading data!\n");
907#endif
908 cmd[0] = SONY535_SPIN_UP;
909 do_sony_cmd(cmd, 1, status, NULL, 0, 0);
910 }
911 }
912 /*
913 * The data is in memory now, copy it to the buffer and advance to the
914 * next block to read.
915 */
916 copyoff = block - sony_first_block;
917 memcpy(req->buffer,
918 sony_buffer[copyoff / 4] + 512 * (copyoff % 4), 512);
919
920 block += 1;
921 nsect -= 1;
922 req->buffer += 512;
923 }
924
925 end_request(req, 1);
926 }
927}
928
929/*
930 * Read the table of contents from the drive and set sony_toc_read if
931 * successful.
932 */
933static void
934sony_get_toc(void)
935{
936 Byte status[2];
937 if (!sony_toc_read) {
938 /* do not call check_drive_status() from here since it can call this routine */
939 if (request_toc_data(status, sony_toc) < 0)
940 return;
941 sony_toc->lead_out_start_lba = msf_to_log(sony_toc->lead_out_start_msf);
942 sony_toc_read = 1;
943 }
944}
945
946
947/*
948 * Search for a specific track in the table of contents. track is
949 * passed in bcd format
950 */
951static int
952find_track(int track)
953{
954 int i;
955 int num_tracks;
956
957
958 num_tracks = bcd_to_int(sony_toc->last_track_num) -
959 bcd_to_int(sony_toc->first_track_num) + 1;
960 for (i = 0; i < num_tracks; i++) {
961 if (sony_toc->tracks[i].track == track) {
962 return i;
963 }
964 }
965
966 return -1;
967}
968
969/*
970 * Read the subcode and put it int last_sony_subcode for future use.
971 */
972static int
973read_subcode(void)
974{
975 Byte cmd = SONY535_REQUEST_SUB_Q_DATA;
976 Byte status[2];
977 int dsc_status;
978
979 if (check_drive_status() != 0)
980 return -EIO;
981
982 if ((dsc_status = do_sony_cmd(&cmd, 1, status, (Byte *) last_sony_subcode,
983 sizeof(struct s535_sony_subcode), 1)) != 0) {
984 printk(CDU535_MESSAGE_NAME " error 0x%.2x, %d (read_subcode)\n",
985 status[0], dsc_status);
986 return -EIO;
987 }
988 return 0;
989}
990
991
992/*
993 * Get the subchannel info like the CDROMSUBCHNL command wants to see it. If
994 * the drive is playing, the subchannel needs to be read (since it would be
995 * changing). If the drive is paused or completed, the subcode information has
996 * already been stored, just use that. The ioctl call wants things in decimal
997 * (not BCD), so all the conversions are done.
998 */
999static int
1000sony_get_subchnl_info(void __user *arg)
1001{
1002 struct cdrom_subchnl schi;
1003
1004 /* Get attention stuff */
1005 if (check_drive_status() != 0)
1006 return -EIO;
1007
1008 sony_get_toc();
1009 if (!sony_toc_read) {
1010 return -EIO;
1011 }
1012 if (copy_from_user(&schi, arg, sizeof schi))
1013 return -EFAULT;
1014
1015 switch (sony_audio_status) {
1016 case CDROM_AUDIO_PLAY:
1017 if (read_subcode() < 0) {
1018 return -EIO;
1019 }
1020 break;
1021
1022 case CDROM_AUDIO_PAUSED:
1023 case CDROM_AUDIO_COMPLETED:
1024 break;
1025
1026 case CDROM_AUDIO_NO_STATUS:
1027 schi.cdsc_audiostatus = sony_audio_status;
1028 if (copy_to_user(arg, &schi, sizeof schi))
1029 return -EFAULT;
1030 return 0;
1031 break;
1032
1033 case CDROM_AUDIO_INVALID:
1034 case CDROM_AUDIO_ERROR:
1035 default:
1036 return -EIO;
1037 }
1038
1039 schi.cdsc_audiostatus = sony_audio_status;
1040 schi.cdsc_adr = last_sony_subcode->address;
1041 schi.cdsc_ctrl = last_sony_subcode->control;
1042 schi.cdsc_trk = bcd_to_int(last_sony_subcode->track_num);
1043 schi.cdsc_ind = bcd_to_int(last_sony_subcode->index_num);
1044 if (schi.cdsc_format == CDROM_MSF) {
1045 schi.cdsc_absaddr.msf.minute = bcd_to_int(last_sony_subcode->abs_msf[0]);
1046 schi.cdsc_absaddr.msf.second = bcd_to_int(last_sony_subcode->abs_msf[1]);
1047 schi.cdsc_absaddr.msf.frame = bcd_to_int(last_sony_subcode->abs_msf[2]);
1048
1049 schi.cdsc_reladdr.msf.minute = bcd_to_int(last_sony_subcode->rel_msf[0]);
1050 schi.cdsc_reladdr.msf.second = bcd_to_int(last_sony_subcode->rel_msf[1]);
1051 schi.cdsc_reladdr.msf.frame = bcd_to_int(last_sony_subcode->rel_msf[2]);
1052 } else if (schi.cdsc_format == CDROM_LBA) {
1053 schi.cdsc_absaddr.lba = msf_to_log(last_sony_subcode->abs_msf);
1054 schi.cdsc_reladdr.lba = msf_to_log(last_sony_subcode->rel_msf);
1055 }
1056 return copy_to_user(arg, &schi, sizeof schi) ? -EFAULT : 0;
1057}
1058
1059
1060/*
1061 * The big ugly ioctl handler.
1062 */
1063static int
1064cdu_ioctl(struct inode *inode,
1065 struct file *file,
1066 unsigned int cmd,
1067 unsigned long arg)
1068{
1069 Byte status[2];
1070 Byte cmd_buff[10], params[10];
1071 int i;
1072 int dsc_status;
1073 void __user *argp = (void __user *)arg;
1074
1075 if (check_drive_status() != 0)
1076 return -EIO;
1077
1078 switch (cmd) {
1079 case CDROMSTART: /* Spin up the drive */
1080 if (spin_up_drive(status) < 0) {
1081 printk(CDU535_MESSAGE_NAME " error 0x%.2x (CDROMSTART)\n",
1082 status[0]);
1083 return -EIO;
1084 }
1085 return 0;
1086 break;
1087
1088 case CDROMSTOP: /* Spin down the drive */
1089 cmd_buff[0] = SONY535_HOLD;
1090 do_sony_cmd(cmd_buff, 1, status, NULL, 0, 0);
1091
1092 /*
1093 * Spin the drive down, ignoring the error if the disk was
1094 * already not spinning.
1095 */
1096 sony_audio_status = CDROM_AUDIO_NO_STATUS;
1097 cmd_buff[0] = SONY535_SPIN_DOWN;
1098 dsc_status = do_sony_cmd(cmd_buff, 1, status, NULL, 0, 0);
1099 if (((dsc_status < 0) && (dsc_status != BAD_STATUS)) ||
1100 ((status[0] & ~(SONY535_STATUS1_NOT_SPINNING)) != 0)) {
1101 printk(CDU535_MESSAGE_NAME " error 0x%.2x (CDROMSTOP)\n",
1102 status[0]);
1103 return -EIO;
1104 }
1105 return 0;
1106 break;
1107
1108 case CDROMPAUSE: /* Pause the drive */
1109 cmd_buff[0] = SONY535_HOLD; /* CDU-31 driver uses AUDIO_STOP, not pause */
1110 if (do_sony_cmd(cmd_buff, 1, status, NULL, 0, 0) != 0) {
1111 printk(CDU535_MESSAGE_NAME " error 0x%.2x (CDROMPAUSE)\n",
1112 status[0]);
1113 return -EIO;
1114 }
1115 /* Get the current position and save it for resuming */
1116 if (read_subcode() < 0) {
1117 return -EIO;
1118 }
1119 cur_pos_msf[0] = last_sony_subcode->abs_msf[0];
1120 cur_pos_msf[1] = last_sony_subcode->abs_msf[1];
1121 cur_pos_msf[2] = last_sony_subcode->abs_msf[2];
1122 sony_audio_status = CDROM_AUDIO_PAUSED;
1123 return 0;
1124 break;
1125
1126 case CDROMRESUME: /* Start the drive after being paused */
1127 set_drive_mode(SONY535_AUDIO_DRIVE_MODE, status);
1128
1129 if (sony_audio_status != CDROM_AUDIO_PAUSED) {
1130 return -EINVAL;
1131 }
1132 spin_up_drive(status);
1133
1134 /* Start the drive at the saved position. */
1135 cmd_buff[0] = SONY535_PLAY_AUDIO;
1136 cmd_buff[1] = 0; /* play back starting at this address */
1137 cmd_buff[2] = cur_pos_msf[0];
1138 cmd_buff[3] = cur_pos_msf[1];
1139 cmd_buff[4] = cur_pos_msf[2];
1140 cmd_buff[5] = SONY535_PLAY_AUDIO;
1141 cmd_buff[6] = 2; /* set ending address */
1142 cmd_buff[7] = final_pos_msf[0];
1143 cmd_buff[8] = final_pos_msf[1];
1144 cmd_buff[9] = final_pos_msf[2];
1145 if ((do_sony_cmd(cmd_buff, 5, status, NULL, 0, 0) != 0) ||
1146 (do_sony_cmd(cmd_buff + 5, 5, status, NULL, 0, 0) != 0)) {
1147 printk(CDU535_MESSAGE_NAME " error 0x%.2x (CDROMRESUME)\n",
1148 status[0]);
1149 return -EIO;
1150 }
1151 sony_audio_status = CDROM_AUDIO_PLAY;
1152 return 0;
1153 break;
1154
1155 case CDROMPLAYMSF: /* Play starting at the given MSF address. */
1156 if (copy_from_user(params, argp, 6))
1157 return -EFAULT;
1158 spin_up_drive(status);
1159 set_drive_mode(SONY535_AUDIO_DRIVE_MODE, status);
1160
1161 /* The parameters are given in int, must be converted */
1162 for (i = 0; i < 3; i++) {
1163 cmd_buff[2 + i] = int_to_bcd(params[i]);
1164 cmd_buff[7 + i] = int_to_bcd(params[i + 3]);
1165 }
1166 cmd_buff[0] = SONY535_PLAY_AUDIO;
1167 cmd_buff[1] = 0; /* play back starting at this address */
1168 /* cmd_buff[2-4] are filled in for loop above */
1169 cmd_buff[5] = SONY535_PLAY_AUDIO;
1170 cmd_buff[6] = 2; /* set ending address */
1171 /* cmd_buff[7-9] are filled in for loop above */
1172 if ((do_sony_cmd(cmd_buff, 5, status, NULL, 0, 0) != 0) ||
1173 (do_sony_cmd(cmd_buff + 5, 5, status, NULL, 0, 0) != 0)) {
1174 printk(CDU535_MESSAGE_NAME " error 0x%.2x (CDROMPLAYMSF)\n",
1175 status[0]);
1176 return -EIO;
1177 }
1178 /* Save the final position for pauses and resumes */
1179 final_pos_msf[0] = cmd_buff[7];
1180 final_pos_msf[1] = cmd_buff[8];
1181 final_pos_msf[2] = cmd_buff[9];
1182 sony_audio_status = CDROM_AUDIO_PLAY;
1183 return 0;
1184 break;
1185
1186 case CDROMREADTOCHDR: /* Read the table of contents header */
1187 {
1188 struct cdrom_tochdr __user *hdr = argp;
1189 struct cdrom_tochdr loc_hdr;
1190
1191 sony_get_toc();
1192 if (!sony_toc_read)
1193 return -EIO;
1194 loc_hdr.cdth_trk0 = bcd_to_int(sony_toc->first_track_num);
1195 loc_hdr.cdth_trk1 = bcd_to_int(sony_toc->last_track_num);
1196 if (copy_to_user(hdr, &loc_hdr, sizeof *hdr))
1197 return -EFAULT;
1198 }
1199 return 0;
1200 break;
1201
1202 case CDROMREADTOCENTRY: /* Read a given table of contents entry */
1203 {
1204 struct cdrom_tocentry __user *entry = argp;
1205 struct cdrom_tocentry loc_entry;
1206 int track_idx;
1207 Byte *msf_val = NULL;
1208
1209 sony_get_toc();
1210 if (!sony_toc_read) {
1211 return -EIO;
1212 }
1213
1214 if (copy_from_user(&loc_entry, entry, sizeof loc_entry))
1215 return -EFAULT;
1216
1217 /* Lead out is handled separately since it is special. */
1218 if (loc_entry.cdte_track == CDROM_LEADOUT) {
1219 loc_entry.cdte_adr = 0 /*sony_toc->address2 */ ;
1220 loc_entry.cdte_ctrl = sony_toc->control2;
1221 msf_val = sony_toc->lead_out_start_msf;
1222 } else {
1223 track_idx = find_track(int_to_bcd(loc_entry.cdte_track));
1224 if (track_idx < 0)
1225 return -EINVAL;
1226 loc_entry.cdte_adr = 0 /*sony_toc->tracks[track_idx].address */ ;
1227 loc_entry.cdte_ctrl = sony_toc->tracks[track_idx].control;
1228 msf_val = sony_toc->tracks[track_idx].track_start_msf;
1229 }
1230
1231 /* Logical buffer address or MSF format requested? */
1232 if (loc_entry.cdte_format == CDROM_LBA) {
1233 loc_entry.cdte_addr.lba = msf_to_log(msf_val);
1234 } else if (loc_entry.cdte_format == CDROM_MSF) {
1235 loc_entry.cdte_addr.msf.minute = bcd_to_int(*msf_val);
1236 loc_entry.cdte_addr.msf.second = bcd_to_int(*(msf_val + 1));
1237 loc_entry.cdte_addr.msf.frame = bcd_to_int(*(msf_val + 2));
1238 }
1239 if (copy_to_user(entry, &loc_entry, sizeof *entry))
1240 return -EFAULT;
1241 }
1242 return 0;
1243 break;
1244
1245 case CDROMPLAYTRKIND: /* Play a track. This currently ignores index. */
1246 {
1247 struct cdrom_ti ti;
1248 int track_idx;
1249
1250 sony_get_toc();
1251 if (!sony_toc_read)
1252 return -EIO;
1253
1254 if (copy_from_user(&ti, argp, sizeof ti))
1255 return -EFAULT;
1256 if ((ti.cdti_trk0 < sony_toc->first_track_num)
1257 || (sony_toc->last_track_num < ti.cdti_trk0)
1258 || (ti.cdti_trk1 < ti.cdti_trk0)) {
1259 return -EINVAL;
1260 }
1261 track_idx = find_track(int_to_bcd(ti.cdti_trk0));
1262 if (track_idx < 0)
1263 return -EINVAL;
1264 params[1] = sony_toc->tracks[track_idx].track_start_msf[0];
1265 params[2] = sony_toc->tracks[track_idx].track_start_msf[1];
1266 params[3] = sony_toc->tracks[track_idx].track_start_msf[2];
1267 /*
1268 * If we want to stop after the last track, use the lead-out
1269 * MSF to do that.
1270 */
1271 if (bcd_to_int(sony_toc->last_track_num) <= ti.cdti_trk1) {
1272 log_to_msf(msf_to_log(sony_toc->lead_out_start_msf) - 1,
1273 &(params[4]));
1274 } else {
1275 track_idx = find_track(int_to_bcd(ti.cdti_trk1 + 1));
1276 if (track_idx < 0)
1277 return -EINVAL;
1278 log_to_msf(msf_to_log(sony_toc->tracks[track_idx].track_start_msf) - 1,
1279 &(params[4]));
1280 }
1281 params[0] = 0x03;
1282
1283 spin_up_drive(status);
1284
1285 set_drive_mode(SONY535_AUDIO_DRIVE_MODE, status);
1286
1287 /* Start the drive at the saved position. */
1288 cmd_buff[0] = SONY535_PLAY_AUDIO;
1289 cmd_buff[1] = 0; /* play back starting at this address */
1290 cmd_buff[2] = params[1];
1291 cmd_buff[3] = params[2];
1292 cmd_buff[4] = params[3];
1293 cmd_buff[5] = SONY535_PLAY_AUDIO;
1294 cmd_buff[6] = 2; /* set ending address */
1295 cmd_buff[7] = params[4];
1296 cmd_buff[8] = params[5];
1297 cmd_buff[9] = params[6];
1298 if ((do_sony_cmd(cmd_buff, 5, status, NULL, 0, 0) != 0) ||
1299 (do_sony_cmd(cmd_buff + 5, 5, status, NULL, 0, 0) != 0)) {
1300 printk(CDU535_MESSAGE_NAME " error 0x%.2x (CDROMPLAYTRKIND)\n",
1301 status[0]);
1302 printk("... Params: %x %x %x %x %x %x %x\n",
1303 params[0], params[1], params[2],
1304 params[3], params[4], params[5], params[6]);
1305 return -EIO;
1306 }
1307 /* Save the final position for pauses and resumes */
1308 final_pos_msf[0] = params[4];
1309 final_pos_msf[1] = params[5];
1310 final_pos_msf[2] = params[6];
1311 sony_audio_status = CDROM_AUDIO_PLAY;
1312 return 0;
1313 }
1314
1315 case CDROMSUBCHNL: /* Get subchannel info */
1316 return sony_get_subchnl_info(argp);
1317
1318 case CDROMVOLCTRL: /* Volume control. What volume does this change, anyway? */
1319 {
1320 struct cdrom_volctrl volctrl;
1321
1322 if (copy_from_user(&volctrl, argp, sizeof volctrl))
1323 return -EFAULT;
1324 cmd_buff[0] = SONY535_SET_VOLUME;
1325 cmd_buff[1] = volctrl.channel0;
1326 cmd_buff[2] = volctrl.channel1;
1327 if (do_sony_cmd(cmd_buff, 3, status, NULL, 0, 0) != 0) {
1328 printk(CDU535_MESSAGE_NAME " error 0x%.2x (CDROMVOLCTRL)\n",
1329 status[0]);
1330 return -EIO;
1331 }
1332 }
1333 return 0;
1334
1335 case CDROMEJECT: /* Eject the drive */
1336 cmd_buff[0] = SONY535_STOP;
1337 do_sony_cmd(cmd_buff, 1, status, NULL, 0, 0);
1338 cmd_buff[0] = SONY535_SPIN_DOWN;
1339 do_sony_cmd(cmd_buff, 1, status, NULL, 0, 0);
1340
1341 sony_audio_status = CDROM_AUDIO_INVALID;
1342 cmd_buff[0] = SONY535_EJECT_CADDY;
1343 if (do_sony_cmd(cmd_buff, 1, status, NULL, 0, 0) != 0) {
1344 printk(CDU535_MESSAGE_NAME " error 0x%.2x (CDROMEJECT)\n",
1345 status[0]);
1346 return -EIO;
1347 }
1348 return 0;
1349 break;
1350
1351 default:
1352 return -EINVAL;
1353 }
1354}
1355
1356
1357/*
1358 * Open the drive for operations. Spin the drive up and read the table of
1359 * contents if these have not already been done.
1360 */
1361static int
1362cdu_open(struct inode *inode,
1363 struct file *filp)
1364{
1365 Byte status[2], cmd_buff[2];
1366
1367 if (sony_inuse)
1368 return -EBUSY;
1369 if (check_drive_status() != 0)
1370 return -EIO;
1371 sony_inuse = 1;
1372
1373 if (spin_up_drive(status) != 0) {
1374 printk(CDU535_MESSAGE_NAME " error 0x%.2x (cdu_open, spin up)\n",
1375 status[0]);
1376 sony_inuse = 0;
1377 return -EIO;
1378 }
1379 sony_get_toc();
1380 if (!sony_toc_read) {
1381 cmd_buff[0] = SONY535_SPIN_DOWN;
1382 do_sony_cmd(cmd_buff, 1, status, NULL, 0, 0);
1383 sony_inuse = 0;
1384 return -EIO;
1385 }
1386 check_disk_change(inode->i_bdev);
1387 sony_usage++;
1388
1389#ifdef LOCK_DOORS
1390 /* disable the eject button while mounted */
1391 cmd_buff[0] = SONY535_DISABLE_EJECT_BUTTON;
1392 do_sony_cmd(cmd_buff, 1, status, NULL, 0, 0);
1393#endif
1394
1395 return 0;
1396}
1397
1398
1399/*
1400 * Close the drive. Spin it down if no task is using it. The spin
1401 * down will fail if playing audio, so audio play is OK.
1402 */
1403static int
1404cdu_release(struct inode *inode,
1405 struct file *filp)
1406{
1407 Byte status[2], cmd_no;
1408
1409 sony_inuse = 0;
1410
1411 if (0 < sony_usage) {
1412 sony_usage--;
1413 }
1414 if (sony_usage == 0) {
1415 check_drive_status();
1416
1417 if (sony_audio_status != CDROM_AUDIO_PLAY) {
1418 cmd_no = SONY535_SPIN_DOWN;
1419 do_sony_cmd(&cmd_no, 1, status, NULL, 0, 0);
1420 }
1421#ifdef LOCK_DOORS
1422 /* enable the eject button after umount */
1423 cmd_no = SONY535_ENABLE_EJECT_BUTTON;
1424 do_sony_cmd(&cmd_no, 1, status, NULL, 0, 0);
1425#endif
1426 }
1427 return 0;
1428}
1429
1430static struct block_device_operations cdu_fops =
1431{
1432 .owner = THIS_MODULE,
1433 .open = cdu_open,
1434 .release = cdu_release,
1435 .ioctl = cdu_ioctl,
1436 .media_changed = cdu535_check_media_change,
1437};
1438
1439static struct gendisk *cdu_disk;
1440
1441/*
1442 * Initialize the driver.
1443 */
1444static int __init sony535_init(void)
1445{
1446 struct s535_sony_drive_config drive_config;
1447 Byte cmd_buff[3];
1448 Byte ret_buff[2];
1449 Byte status[2];
1450 unsigned long snap;
1451 int got_result = 0;
1452 int tmp_irq;
1453 int i;
1454 int err;
1455
1456 /* Setting the base I/O address to 0 will disable it. */
1457 if ((sony535_cd_base_io == 0xffff)||(sony535_cd_base_io == 0))
1458 return 0;
1459
1460 /* Set up all the register locations */
1461 result_reg = sony535_cd_base_io;
1462 command_reg = sony535_cd_base_io;
1463 data_reg = sony535_cd_base_io + 1;
1464 read_status_reg = sony535_cd_base_io + 2;
1465 select_unit_reg = sony535_cd_base_io + 3;
1466
1467#ifndef USE_IRQ
1468 sony535_irq_used = 0; /* polling only until this is ready... */
1469#endif
1470 /* we need to poll until things get initialized */
1471 tmp_irq = sony535_irq_used;
1472 sony535_irq_used = 0;
1473
1474#if DEBUG > 0
1475 printk(KERN_INFO CDU535_MESSAGE_NAME ": probing base address %03X\n",
1476 sony535_cd_base_io);
1477#endif
1478 /* look for the CD-ROM, follows the procedure in the DOS driver */
1479 inb(select_unit_reg);
1480 /* wait for 40 18 Hz ticks (reverse-engineered from DOS driver) */
1481 schedule_timeout_interruptible((HZ+17)*40/18);
1482 inb(result_reg);
1483
1484 outb(0, read_status_reg); /* does a reset? */
1485 snap = jiffies;
1486 while (jiffies-snap < SONY_JIFFIES_TIMEOUT) {
1487 select_unit(0);
1488 if (inb(result_reg) != 0xff) {
1489 got_result = 1;
1490 break;
1491 }
1492 sony_sleep();
1493 }
1494
1495 if (!got_result || check_drive_status() == TIME_OUT)
1496 goto Enodev;
1497
1498 /* CD-ROM drive responded -- get the drive configuration */
1499 cmd_buff[0] = SONY535_INQUIRY;
1500 if (do_sony_cmd(cmd_buff, 1, status, (Byte *)&drive_config, 28, 1) != 0)
1501 goto Enodev;
1502
1503 /* was able to get the configuration,
1504 * set drive mode as rest of init
1505 */
1506#if DEBUG > 0
1507 /* 0x50 == CADDY_NOT_INSERTED | NOT_SPINNING */
1508 if ( (status[0] & 0x7f) != 0 && (status[0] & 0x7f) != 0x50 )
1509 printk(CDU535_MESSAGE_NAME
1510 "Inquiry command returned status = 0x%x\n", status[0]);
1511#endif
1512 /* now ready to use interrupts, if available */
1513 sony535_irq_used = tmp_irq;
1514
1515 /* A negative sony535_irq_used will attempt an autoirq. */
1516 if (sony535_irq_used < 0) {
1517 unsigned long irq_mask, delay;
1518
1519 irq_mask = probe_irq_on();
1520 enable_interrupts();
1521 outb(0, read_status_reg); /* does a reset? */
1522 delay = jiffies + HZ/10;
1523 while (time_before(jiffies, delay)) ;
1524
1525 sony535_irq_used = probe_irq_off(irq_mask);
1526 disable_interrupts();
1527 }
1528 if (sony535_irq_used > 0) {
1529 if (request_irq(sony535_irq_used, cdu535_interrupt,
1530 IRQF_DISABLED, CDU535_HANDLE, NULL)) {
1531 printk("Unable to grab IRQ%d for the " CDU535_MESSAGE_NAME
1532 " driver; polling instead.\n", sony535_irq_used);
1533 sony535_irq_used = 0;
1534 }
1535 }
1536 cmd_buff[0] = SONY535_SET_DRIVE_MODE;
1537 cmd_buff[1] = 0x0; /* default audio */
1538 if (do_sony_cmd(cmd_buff, 2, status, ret_buff, 1, 1) != 0)
1539 goto Enodev_irq;
1540
1541 /* set the drive mode successful, we are set! */
1542 sony_buffer_size = SONY535_BUFFER_SIZE;
1543 sony_buffer_sectors = sony_buffer_size / CDU535_BLOCK_SIZE;
1544
1545 printk(KERN_INFO CDU535_MESSAGE_NAME " I/F CDROM : %8.8s %16.16s %4.4s",
1546 drive_config.vendor_id,
1547 drive_config.product_id,
1548 drive_config.product_rev_level);
1549 printk(" base address %03X, ", sony535_cd_base_io);
1550 if (tmp_irq > 0)
1551 printk("IRQ%d, ", tmp_irq);
1552 printk("using %d byte buffer\n", sony_buffer_size);
1553
1554 if (register_blkdev(MAJOR_NR, CDU535_HANDLE)) {
1555 err = -EIO;
1556 goto out1;
1557 }
1558 sonycd535_queue = blk_init_queue(do_cdu535_request, &sonycd535_lock);
1559 if (!sonycd535_queue) {
1560 err = -ENOMEM;
1561 goto out1a;
1562 }
1563
1564 blk_queue_hardsect_size(sonycd535_queue, CDU535_BLOCK_SIZE);
1565 sony_toc = kmalloc(sizeof(struct s535_sony_toc), GFP_KERNEL);
1566 err = -ENOMEM;
1567 if (!sony_toc)
1568 goto out2;
1569 last_sony_subcode = kmalloc(sizeof(struct s535_sony_subcode), GFP_KERNEL);
1570 if (!last_sony_subcode)
1571 goto out3;
1572 sony_buffer = kmalloc(sizeof(Byte *) * sony_buffer_sectors, GFP_KERNEL);
1573 if (!sony_buffer)
1574 goto out4;
1575 for (i = 0; i < sony_buffer_sectors; i++) {
1576 sony_buffer[i] = kmalloc(CDU535_BLOCK_SIZE, GFP_KERNEL);
1577 if (!sony_buffer[i]) {
1578 while (--i>=0)
1579 kfree(sony_buffer[i]);
1580 goto out5;
1581 }
1582 }
1583 initialized = 1;
1584
1585 cdu_disk = alloc_disk(1);
1586 if (!cdu_disk)
1587 goto out6;
1588 cdu_disk->major = MAJOR_NR;
1589 cdu_disk->first_minor = 0;
1590 cdu_disk->fops = &cdu_fops;
1591 sprintf(cdu_disk->disk_name, "cdu");
1592
1593 if (!request_region(sony535_cd_base_io, 4, CDU535_HANDLE)) {
1594 printk(KERN_WARNING"sonycd535: Unable to request region 0x%x\n",
1595 sony535_cd_base_io);
1596 goto out7;
1597 }
1598 cdu_disk->queue = sonycd535_queue;
1599 add_disk(cdu_disk);
1600 return 0;
1601
1602out7:
1603 put_disk(cdu_disk);
1604out6:
1605 for (i = 0; i < sony_buffer_sectors; i++)
1606 kfree(sony_buffer[i]);
1607out5:
1608 kfree(sony_buffer);
1609out4:
1610 kfree(last_sony_subcode);
1611out3:
1612 kfree(sony_toc);
1613out2:
1614 blk_cleanup_queue(sonycd535_queue);
1615out1a:
1616 unregister_blkdev(MAJOR_NR, CDU535_HANDLE);
1617out1:
1618 if (sony535_irq_used)
1619 free_irq(sony535_irq_used, NULL);
1620 return err;
1621Enodev_irq:
1622 if (sony535_irq_used)
1623 free_irq(sony535_irq_used, NULL);
1624Enodev:
1625 printk("Did not find a " CDU535_MESSAGE_NAME " drive\n");
1626 return -EIO;
1627}
1628
1629#ifndef MODULE
1630
1631/*
1632 * accept "kernel command line" parameters
1633 * (added by emoenke@gwdg.de)
1634 *
1635 * use: tell LILO:
1636 * sonycd535=0x320
1637 *
1638 * the address value has to be the existing CDROM port address.
1639 */
1640static int __init
1641sonycd535_setup(char *strings)
1642{
1643 int ints[3];
1644 (void)get_options(strings, ARRAY_SIZE(ints), ints);
1645 /* if IRQ change and default io base desired,
1646 * then call with io base of 0
1647 */
1648 if (ints[0] > 0)
1649 if (ints[1] != 0)
1650 sony535_cd_base_io = ints[1];
1651 if (ints[0] > 1)
1652 sony535_irq_used = ints[2];
1653 if ((strings != NULL) && (*strings != '\0'))
1654 printk(CDU535_MESSAGE_NAME
1655 ": Warning: Unknown interface type: %s\n", strings);
1656
1657 return 1;
1658}
1659
1660__setup("sonycd535=", sonycd535_setup);
1661
1662#endif /* MODULE */
1663
1664static void __exit
1665sony535_exit(void)
1666{
1667 int i;
1668
1669 release_region(sony535_cd_base_io, 4);
1670 for (i = 0; i < sony_buffer_sectors; i++)
1671 kfree(sony_buffer[i]);
1672 kfree(sony_buffer);
1673 kfree(last_sony_subcode);
1674 kfree(sony_toc);
1675 del_gendisk(cdu_disk);
1676 put_disk(cdu_disk);
1677 blk_cleanup_queue(sonycd535_queue);
1678 if (unregister_blkdev(MAJOR_NR, CDU535_HANDLE) == -EINVAL)
1679 printk("Uh oh, couldn't unregister " CDU535_HANDLE "\n");
1680 else
1681 printk(KERN_INFO CDU535_HANDLE " module released\n");
1682}
1683
1684module_init(sony535_init);
1685module_exit(sony535_exit);
1686
1687
1688MODULE_LICENSE("GPL");
1689MODULE_ALIAS_BLOCKDEV_MAJOR(CDU535_CDROM_MAJOR);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-12 20:11:55 -0500