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aztcd.c
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#define AZT_VERSION "2.60"
/* $Id: aztcd.c,v 2.60 1997/11/29 09:51:19 root Exp root $
linux/drivers/block/aztcd.c - Aztech CD268 CDROM driver
Copyright (C) 1994-98 Werner Zimmermann(Werner.Zimmermann@fht-esslingen.de)
based on Mitsumi CDROM driver by Martin Hariss and preworks by
Eberhard Moenkeberg; contains contributions by Joe Nardone and Robby
Schirmer.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
HISTORY
V0.0 Adaption to Aztech CD268-01A Version 1.3
Version is PRE_ALPHA, unresolved points:
1. I use busy wait instead of timer wait in STEN_LOW,DTEN_LOW
thus driver causes CPU overhead and is very slow
2. could not find a way to stop the drive, when it is
in data read mode, therefore I had to set
msf.end.min/sec/frame to 0:0:1 (in azt_poll); so only one
frame can be read in sequence, this is also the reason for
3. getting 'timeout in state 4' messages, but nevertheless
it works
W.Zimmermann, Oct. 31, 1994
V0.1 Version is ALPHA, problems #2 and #3 resolved.
W.Zimmermann, Nov. 3, 1994
V0.2 Modification to some comments, debugging aids for partial test
with Borland C under DOS eliminated. Timer interrupt wait
STEN_LOW_WAIT additionally to busy wait for STEN_LOW implemented;
use it only for the 'slow' commands (ACMD_GET_Q_CHANNEL, ACMD_
SEEK_TO_LEAD_IN), all other commands are so 'fast', that busy
waiting seems better to me than interrupt rescheduling.
Besides that, when used in the wrong place, STEN_LOW_WAIT causes
kernel panic.
In function aztPlay command ACMD_PLAY_AUDIO added, should make
audio functions work. The Aztech drive needs different commands
to read data tracks and play audio tracks.
W.Zimmermann, Nov. 8, 1994
V0.3 Recognition of missing drive during boot up improved (speeded up).
W.Zimmermann, Nov. 13, 1994
V0.35 Rewrote the control mechanism in azt_poll (formerly mcd_poll)
including removal of all 'goto' commands. :-);
J. Nardone, Nov. 14, 1994
V0.4 Renamed variables and constants to 'azt' instead of 'mcd'; had
to make some "compatibility" defines in azt.h; please note,
that the source file was renamed to azt.c, the include file to
azt.h
Speeded up drive recognition during init (will be a little bit
slower than before if no drive is installed!); suggested by
Robby Schirmer.
read_count declared volatile and set to AZT_BUF_SIZ to make
drive faster (now 300kB/sec, was 60kB/sec before, measured
by 'time dd if=/dev/cdrom of=/dev/null bs=2048 count=4096';
different AZT_BUF_SIZes were test, above 16 no further im-
provement seems to be possible; suggested by E.Moenkeberg.
W.Zimmermann, Nov. 18, 1994
V0.42 Included getAztStatus command in GetQChannelInfo() to allow
reading Q-channel info on audio disks, if drive is stopped,
and some other bug fixes in the audio stuff, suggested by
Robby Schirmer.
Added more ioctls (reading data in mode 1 and mode 2).
Completely removed the old azt_poll() routine.
Detection of ORCHID CDS-3110 in aztcd_init implemented.
Additional debugging aids (see the readme file).
W.Zimmermann, Dec. 9, 1994
V0.50 Autodetection of drives implemented.
W.Zimmermann, Dec. 12, 1994
V0.52 Prepared for including in the standard kernel, renamed most
variables to contain 'azt', included autoconf.h
W.Zimmermann, Dec. 16, 1994
V0.6 Version for being included in the standard Linux kernel.
Renamed source and header file to aztcd.c and aztcd.h
W.Zimmermann, Dec. 24, 1994
V0.7 Changed VERIFY_READ to VERIFY_WRITE in aztcd_ioctl, case
CDROMREADMODE1 and CDROMREADMODE2; bug fix in the ioctl,
which causes kernel crashes when playing audio, changed
include-files (config.h instead of autoconf.h, removed
delay.h)
W.Zimmermann, Jan. 8, 1995
V0.72 Some more modifications for adaption to the standard kernel.
W.Zimmermann, Jan. 16, 1995
V0.80 aztcd is now part of the standard kernel since version 1.1.83.
Modified the SET_TIMER and CLEAR_TIMER macros to comply with
the new timer scheme.
W.Zimmermann, Jan. 21, 1995
V0.90 Included CDROMVOLCTRL, but with my Aztech drive I can only turn
the channels on and off. If it works better with your drive,
please mail me. Also implemented ACMD_CLOSE for CDROMSTART.
W.Zimmermann, Jan. 24, 1995
V1.00 Implemented close and lock tray commands. Patches supplied by
Frank Racis
Added support for loadable MODULEs, so aztcd can now also be
loaded by insmod and removed by rmmod during run time
Werner Zimmermann, Mar. 24, 95
V1.10 Implemented soundcard configuration for Orchid CDS-3110 drives
connected to Soundwave32 cards. Release for LST 2.1.
(still experimental)
Werner Zimmermann, May 8, 95
V1.20 Implemented limited support for DOSEMU0.60's cdrom.c. Now it works, but
sometimes DOSEMU may hang for 30 seconds or so. A fully functional ver-
sion needs an update of Dosemu0.60's cdrom.c, which will come with the
next revision of Dosemu.
Also Soundwave32 support now works.
Werner Zimmermann, May 22, 95
V1.30 Auto-eject feature. Inspired by Franc Racis (racis@psu.edu)
Werner Zimmermann, July 4, 95
V1.40 Started multisession support. Implementation copied from mcdx.c
by Heiko Schlittermann. Not tested yet.
Werner Zimmermann, July 15, 95
V1.50 Implementation of ioctl CDROMRESET, continued multisession, began
XA, but still untested. Heavy modifications to drive status de-
tection.
Werner Zimmermann, July 25, 95
V1.60 XA support now should work. Speeded up drive recognition in cases,
where no drive is installed.
Werner Zimmermann, August 8, 1995
V1.70 Multisession support now is completed, but there is still not
enough testing done. If you can test it, please contact me. For
details please read Documentation/cdrom/aztcd
Werner Zimmermann, August 19, 1995
V1.80 Modification to suit the new kernel boot procedure introduced
with kernel 1.3.33. Will definitely not work with older kernels.
Programming done by Linus himself.
Werner Zimmermann, October 11, 1995
V1.90 Support for Conrad TXC drives, thank's to Jochen Kunz and Olaf Kaluza.
Werner Zimmermann, October 21, 1995
V2.00 Changed #include "blk.h" to <linux/blk.h> as the directory
structure was changed. README.aztcd is now /usr/src/docu-
mentation/cdrom/aztcd
Werner Zimmermann, November 10, 95
V2.10 Started to modify azt_poll to prevent reading beyond end of
tracks.
Werner Zimmermann, December 3, 95
V2.20 Changed some comments
Werner Zimmermann, April 1, 96
V2.30 Implemented support for CyCDROM CR520, CR940, Code for CR520
delivered by H.Berger with preworks by E.Moenkeberg.
Werner Zimmermann, April 29, 96
V2.40 Reorganized the placement of functions in the source code file
to reflect the layered approach; did not actually change code
Werner Zimmermann, May 1, 96
V2.50 Heiko Eissfeldt suggested to remove some VERIFY_READs in
aztcd_ioctl; check_aztcd_media_change modified
Werner Zimmermann, May 16, 96
V2.60 Implemented Auto-Probing; made changes for kernel's 2.1.xx blocksize
Adaption to linux kernel > 2.1.0
Werner Zimmermann, Nov 29, 97
November 1999 -- Make kernel-parameter implementation work with 2.3.x
Removed init_module & cleanup_module in favor of
module_init & module_exit.
Torben Mathiasen <tmm@image.dk>
*/
#include <linux/blkdev.h>
#include "aztcd.h"
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/timer.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/cdrom.h>
#include <linux/ioport.h>
#include <linux/string.h>
#include <linux/major.h>
#include <linux/init.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/uaccess.h>
/*###########################################################################
Defines
###########################################################################
*/
#define MAJOR_NR AZTECH_CDROM_MAJOR
#define QUEUE (azt_queue)
#define CURRENT elv_next_request(azt_queue)
#define SET_TIMER(func, jifs) delay_timer.expires = jiffies + (jifs); \
delay_timer.function = (void *) (func); \
add_timer(&delay_timer);
#define CLEAR_TIMER del_timer(&delay_timer);
#define RETURNM(message,value) {printk("aztcd: Warning: %s failed\n",message);\
return value;}
#define RETURN(message) {printk("aztcd: Warning: %s failed\n",message);\
return;}
/* Macros to switch the IDE-interface to the slave device and back to the master*/
#define SWITCH_IDE_SLAVE outb_p(0xa0,azt_port+6); \
outb_p(0x10,azt_port+6); \
outb_p(0x00,azt_port+7); \
outb_p(0x10,azt_port+6);
#define SWITCH_IDE_MASTER outb_p(0xa0,azt_port+6);
#if 0
#define AZT_TEST
#define AZT_TEST1 /* <int-..> */
#define AZT_TEST2 /* do_aztcd_request */
#define AZT_TEST3 /* AZT_S_state */
#define AZT_TEST4 /* QUICK_LOOP-counter */
#define AZT_TEST5 /* port(1) state */
#define AZT_DEBUG
#define AZT_DEBUG_MULTISESSION
#endif
static struct request_queue *azt_queue;
static int current_valid(void)
{
return CURRENT &&
CURRENT->cmd == READ &&
CURRENT->sector != -1;
}
#define AFL_STATUSorDATA (AFL_STATUS | AFL_DATA)
#define AZT_BUF_SIZ 16
#define READ_TIMEOUT 3000
#define azt_port aztcd /*needed for the modutils */
/*##########################################################################
Type Definitions
##########################################################################
*/
enum azt_state_e { AZT_S_IDLE, /* 0 */
AZT_S_START, /* 1 */
AZT_S_MODE, /* 2 */
AZT_S_READ, /* 3 */
AZT_S_DATA, /* 4 */
AZT_S_STOP, /* 5 */
AZT_S_STOPPING /* 6 */
};
enum azt_read_modes { AZT_MODE_0, /*read mode for audio disks, not supported by Aztech firmware */
AZT_MODE_1, /*read mode for normal CD-ROMs */
AZT_MODE_2 /*read mode for XA CD-ROMs */
};
/*##########################################################################
Global Variables
##########################################################################
*/
static int aztPresent = 0;
static volatile int azt_transfer_is_active = 0;
static char azt_buf[CD_FRAMESIZE_RAW * AZT_BUF_SIZ]; /*buffer for block size conversion */
#if AZT_PRIVATE_IOCTLS
static char buf[CD_FRAMESIZE_RAW]; /*separate buffer for the ioctls */
#endif
static volatile int azt_buf_bn[AZT_BUF_SIZ], azt_next_bn;
static volatile int azt_buf_in, azt_buf_out = -1;
static volatile int azt_error = 0;
static int azt_open_count = 0;
static volatile enum azt_state_e azt_state = AZT_S_IDLE;
#ifdef AZT_TEST3
static volatile enum azt_state_e azt_state_old = AZT_S_STOP;
static volatile int azt_st_old = 0;
#endif
static volatile enum azt_read_modes azt_read_mode = AZT_MODE_1;
static int azt_mode = -1;
static volatile int azt_read_count = 1;
static int azt_port = AZT_BASE_ADDR;
module_param(azt_port, int, 0);
static int azt_port_auto[16] = AZT_BASE_AUTO;
static char azt_cont = 0;
static char azt_init_end = 0;
static char azt_auto_eject = AZT_AUTO_EJECT;
static int AztTimeout, AztTries;
static DECLARE_WAIT_QUEUE_HEAD(azt_waitq);
static DEFINE_TIMER(delay_timer, NULL, 0, 0);
static struct azt_DiskInfo DiskInfo;
static struct azt_Toc Toc[MAX_TRACKS];
static struct azt_Play_msf azt_Play;
static int aztAudioStatus = CDROM_AUDIO_NO_STATUS;
static char aztDiskChanged = 1;
static char aztTocUpToDate = 0;
static unsigned char aztIndatum;
static unsigned long aztTimeOutCount;
static int aztCmd = 0;
static DEFINE_SPINLOCK(aztSpin);
/*###########################################################################
Function Prototypes
###########################################################################
*/
/* CDROM Drive Low Level I/O Functions */
static void aztStatTimer(void);
/* CDROM Drive Command Functions */
static int aztGetDiskInfo(void);
#if AZT_MULTISESSION
static int aztGetMultiDiskInfo(void);
#endif
static int aztGetToc(int multi);
/* Kernel Interface Functions */
static int check_aztcd_media_change(struct gendisk *disk);
static int aztcd_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
unsigned long arg);
static int aztcd_open(struct inode *ip, struct file *fp);
static int aztcd_release(struct inode *inode, struct file *file);
static struct block_device_operations azt_fops = {
.owner = THIS_MODULE,
.open = aztcd_open,
.release = aztcd_release,
.ioctl = aztcd_ioctl,
.media_changed = check_aztcd_media_change,
};
/* Aztcd State Machine: Controls Drive Operating State */
static void azt_poll(void);
/* Miscellaneous support functions */
static void azt_hsg2msf(long hsg, struct msf *msf);
static long azt_msf2hsg(struct msf *mp);
static void azt_bin2bcd(unsigned char *p);
static int azt_bcd2bin(unsigned char bcd);
/*##########################################################################
CDROM Drive Low Level I/O Functions
##########################################################################
*/
/* Macros for the drive hardware interface handshake, these macros use
busy waiting */
/* Wait for OP_OK = drive answers with AFL_OP_OK after receiving a command*/
# define OP_OK op_ok()
static void op_ok(void)
{
aztTimeOutCount = 0;
do {
aztIndatum = inb(DATA_PORT);
aztTimeOutCount++;
if (aztTimeOutCount >= AZT_TIMEOUT) {
printk("aztcd: Error Wait OP_OK\n");
break;
}
} while (aztIndatum != AFL_OP_OK);
}
/* Wait for PA_OK = drive answers with AFL_PA_OK after receiving parameters*/
#if 0
# define PA_OK pa_ok()
static void pa_ok(void)
{
aztTimeOutCount = 0;
do {
aztIndatum = inb(DATA_PORT);
aztTimeOutCount++;
if (aztTimeOutCount >= AZT_TIMEOUT) {
printk("aztcd: Error Wait PA_OK\n");
break;
}
} while (aztIndatum != AFL_PA_OK);
}
#endif
/* Wait for STEN=Low = handshake signal 'AFL_.._OK available or command executed*/
# define STEN_LOW sten_low()
static void sten_low(void)
{
aztTimeOutCount = 0;
do {
aztIndatum = inb(STATUS_PORT);
aztTimeOutCount++;
if (aztTimeOutCount >= AZT_TIMEOUT) {
if (azt_init_end)
printk
("aztcd: Error Wait STEN_LOW commands:%x\n",
aztCmd);
break;
}
} while (aztIndatum & AFL_STATUS);
}
/* Wait for DTEN=Low = handshake signal 'Data available'*/
# define DTEN_LOW dten_low()
static void dten_low(void)
{
aztTimeOutCount = 0;
do {
aztIndatum = inb(STATUS_PORT);
aztTimeOutCount++;
if (aztTimeOutCount >= AZT_TIMEOUT) {
printk("aztcd: Error Wait DTEN_OK\n");
break;
}
} while (aztIndatum & AFL_DATA);
}
/*
* Macro for timer wait on STEN=Low, should only be used for 'slow' commands;
* may cause kernel panic when used in the wrong place
*/
#define STEN_LOW_WAIT statusAzt()
static void statusAzt(void)
{
AztTimeout = AZT_STATUS_DELAY;
SET_TIMER(aztStatTimer, HZ / 100);
sleep_on(&azt_waitq);
if (AztTimeout <= 0)
printk("aztcd: Error Wait STEN_LOW_WAIT command:%x\n",
aztCmd);
return;
}
static void aztStatTimer(void)
{
if (!(inb(STATUS_PORT) & AFL_STATUS)) {
wake_up(&azt_waitq);
return;
}
AztTimeout--;
if (AztTimeout <= 0) {
wake_up(&azt_waitq);
printk("aztcd: Error aztStatTimer: Timeout\n");
return;
}
SET_TIMER(aztStatTimer, HZ / 100);
}
/*##########################################################################
CDROM Drive Command Functions
##########################################################################
*/
/*
* Send a single command, return -1 on error, else 0
*/
static int aztSendCmd(int cmd)
{
unsigned char data;
int retry;
#ifdef AZT_DEBUG
printk("aztcd: Executing command %x\n", cmd);
#endif
if ((azt_port == 0x1f0) || (azt_port == 0x170))
SWITCH_IDE_SLAVE; /*switch IDE interface to slave configuration */
aztCmd = cmd;
outb(POLLED, MODE_PORT);
do {
if (inb(STATUS_PORT) & AFL_STATUS)
break;
inb(DATA_PORT); /* if status left from last command, read and */
} while (1); /* discard it */
do {
if (inb(STATUS_PORT) & AFL_DATA)
break;
inb(DATA_PORT); /* if data left from last command, read and */
} while (1); /* discard it */
for (retry = 0; retry < AZT_RETRY_ATTEMPTS; retry++) {
outb((unsigned char) cmd, CMD_PORT);
STEN_LOW;
data = inb(DATA_PORT);
if (data == AFL_OP_OK) {
return 0;
} /*OP_OK? */
if (data == AFL_OP_ERR) {
STEN_LOW;
data = inb(DATA_PORT);
printk
("### Error 1 aztcd: aztSendCmd %x Error Code %x\n",
cmd, data);
}
}
if (retry >= AZT_RETRY_ATTEMPTS) {
printk("### Error 2 aztcd: aztSendCmd %x \n", cmd);
azt_error = 0xA5;
}
RETURNM("aztSendCmd", -1);
}
/*
* Send a play or read command to the drive, return -1 on error, else 0
*/
static int sendAztCmd(int cmd, struct azt_Play_msf *params)
{
unsigned char data;
int retry;
#ifdef AZT_DEBUG
printk("aztcd: play start=%02x:%02x:%02x end=%02x:%02x:%02x\n",
params->start.min, params->start.sec, params->start.frame,
params->end.min, params->end.sec, params->end.frame);
#endif
for (retry = 0; retry < AZT_RETRY_ATTEMPTS; retry++) {
aztSendCmd(cmd);
outb(params->start.min, CMD_PORT);
outb(params->start.sec, CMD_PORT);
outb(params->start.frame, CMD_PORT);
outb(params->end.min, CMD_PORT);
outb(params->end.sec, CMD_PORT);
outb(params->end.frame, CMD_PORT);
STEN_LOW;
data = inb(DATA_PORT);
if (data == AFL_PA_OK) {
return 0;
} /*PA_OK ? */
if (data == AFL_PA_ERR) {
STEN_LOW;
data = inb(DATA_PORT);
printk
("### Error 1 aztcd: sendAztCmd %x Error Code %x\n",
cmd, data);
}
}
if (retry >= AZT_RETRY_ATTEMPTS) {
printk("### Error 2 aztcd: sendAztCmd %x\n ", cmd);
azt_error = 0xA5;
}
RETURNM("sendAztCmd", -1);
}
/*
* Send a seek command to the drive, return -1 on error, else 0
*/
static int aztSeek(struct azt_Play_msf *params)
{
unsigned char data;
int retry;
#ifdef AZT_DEBUG
printk("aztcd: aztSeek %02x:%02x:%02x\n",
params->start.min, params->start.sec, params->start.frame);
#endif
for (retry = 0; retry < AZT_RETRY_ATTEMPTS; retry++) {
aztSendCmd(ACMD_SEEK);
outb(params->start.min, CMD_PORT);
outb(params->start.sec, CMD_PORT);
outb(params->start.frame, CMD_PORT);
STEN_LOW;
data = inb(DATA_PORT);
if (data == AFL_PA_OK) {
return 0;
} /*PA_OK ? */
if (data == AFL_PA_ERR) {
STEN_LOW;
data = inb(DATA_PORT);
printk("### Error 1 aztcd: aztSeek\n");
}
}
if (retry >= AZT_RETRY_ATTEMPTS) {
printk("### Error 2 aztcd: aztSeek\n ");
azt_error = 0xA5;
}
RETURNM("aztSeek", -1);
}
/* Send a Set Disk Type command
does not seem to work with Aztech drives, behavior is completely indepen-
dent on which mode is set ???
*/
static int aztSetDiskType(int type)
{
unsigned char data;
int retry;
#ifdef AZT_DEBUG
printk("aztcd: set disk type command: type= %i\n", type);
#endif
for (retry = 0; retry < AZT_RETRY_ATTEMPTS; retry++) {
aztSendCmd(ACMD_SET_DISK_TYPE);
outb(type, CMD_PORT);
STEN_LOW;
data = inb(DATA_PORT);
if (data == AFL_PA_OK) { /*PA_OK ? */
azt_read_mode = type;
return 0;
}
if (data == AFL_PA_ERR) {
STEN_LOW;
data = inb(DATA_PORT);
printk
("### Error 1 aztcd: aztSetDiskType %x Error Code %x\n",
type, data);
}
}
if (retry >= AZT_RETRY_ATTEMPTS) {
printk("### Error 2 aztcd: aztSetDiskType %x\n ", type);
azt_error = 0xA5;
}
RETURNM("aztSetDiskType", -1);
}
/* used in azt_poll to poll the status, expects another program to issue a
* ACMD_GET_STATUS directly before
*/
static int aztStatus(void)
{
int st;
/* int i;
i = inb(STATUS_PORT) & AFL_STATUS; is STEN=0? ???
if (!i)
*/ STEN_LOW;
if (aztTimeOutCount < AZT_TIMEOUT) {
st = inb(DATA_PORT) & 0xFF;
return st;
} else
RETURNM("aztStatus", -1);
}
/*
* Get the drive status
*/
static int getAztStatus(void)
{
int st;
if (aztSendCmd(ACMD_GET_STATUS))
RETURNM("getAztStatus 1", -1);
STEN_LOW;
st = inb(DATA_PORT) & 0xFF;
#ifdef AZT_DEBUG
printk("aztcd: Status = %x\n", st);
#endif
if ((st == 0xFF) || (st & AST_CMD_CHECK)) {
printk
("aztcd: AST_CMD_CHECK error or no status available\n");
return -1;
}
if (((st & AST_MODE_BITS) != AST_BUSY)
&& (aztAudioStatus == CDROM_AUDIO_PLAY))
/* XXX might be an error? look at q-channel? */
aztAudioStatus = CDROM_AUDIO_COMPLETED;
if ((st & AST_DSK_CHG) || (st & AST_NOT_READY)) {
aztDiskChanged = 1;
aztTocUpToDate = 0;
aztAudioStatus = CDROM_AUDIO_NO_STATUS;
}
return st;
}
/*
* Send a 'Play' command and get the status. Use only from the top half.
*/
static int aztPlay(struct azt_Play_msf *arg)
{
if (sendAztCmd(ACMD_PLAY_AUDIO, arg) < 0)
RETURNM("aztPlay", -1);
return 0;
}
/*
* Subroutines to automatically close the door (tray) and
* lock it closed when the cd is mounted. Leave the tray
* locking as an option
*/
static void aztCloseDoor(void)
{
aztSendCmd(ACMD_CLOSE);
STEN_LOW;
return;
}
static void aztLockDoor(void)
{
#if AZT_ALLOW_TRAY_LOCK
aztSendCmd(ACMD_LOCK);
STEN_LOW;
#endif
return;
}
static void aztUnlockDoor(void)
{
#if AZT_ALLOW_TRAY_LOCK
aztSendCmd(ACMD_UNLOCK);
STEN_LOW;
#endif
return;
}
/*
* Read a value from the drive. Should return quickly, so a busy wait
* is used to avoid excessive rescheduling. The read command itself must
* be issued with aztSendCmd() directly before
*/
static int aztGetValue(unsigned char *result)
{
int s;
STEN_LOW;
if (aztTimeOutCount >= AZT_TIMEOUT) {
printk("aztcd: aztGetValue timeout\n");
return -1;
}
s = inb(DATA_PORT) & 0xFF;
*result = (unsigned char) s;
return 0;
}
/*
* Read the current Q-channel info. Also used for reading the
* table of contents.
*/
static int aztGetQChannelInfo(struct azt_Toc *qp)
{
unsigned char notUsed;
int st;
#ifdef AZT_DEBUG
printk("aztcd: starting aztGetQChannelInfo Time:%li\n", jiffies);
#endif
if ((st = getAztStatus()) == -1)
RETURNM("aztGetQChannelInfo 1", -1);
if (aztSendCmd(ACMD_GET_Q_CHANNEL))
RETURNM("aztGetQChannelInfo 2", -1);
/*STEN_LOW_WAIT; ??? Dosemu0.60's cdrom.c does not like STEN_LOW_WAIT here */
if (aztGetValue(¬Used))
RETURNM("aztGetQChannelInfo 3", -1); /*??? Nullbyte einlesen */
if ((st & AST_MODE_BITS) == AST_INITIAL) {
qp->ctrl_addr = 0; /* when audio stop ACMD_GET_Q_CHANNEL returns */
qp->track = 0; /* only one byte with Aztech drives */
qp->pointIndex = 0;
qp->trackTime.min = 0;
qp->trackTime.sec = 0;
qp->trackTime.frame = 0;
qp->diskTime.min = 0;
qp->diskTime.sec = 0;
qp->diskTime.frame = 0;
return 0;
} else {
if (aztGetValue(&qp->ctrl_addr) < 0)
RETURNM("aztGetQChannelInfo 4", -1);
if (aztGetValue(&qp->track) < 0)
RETURNM("aztGetQChannelInfo 4", -1);
if (aztGetValue(&qp->pointIndex) < 0)
RETURNM("aztGetQChannelInfo 4", -1);
if (aztGetValue(&qp->trackTime.min) < 0)
RETURNM("aztGetQChannelInfo 4", -1);
if (aztGetValue(&qp->trackTime.sec) < 0)
RETURNM("aztGetQChannelInfo 4", -1);
if (aztGetValue(&qp->trackTime.frame) < 0)
RETURNM("aztGetQChannelInfo 4", -1);
if (aztGetValue(¬Used) < 0)
RETURNM("aztGetQChannelInfo 4", -1);
if (aztGetValue(&qp->diskTime.min) < 0)
RETURNM("aztGetQChannelInfo 4", -1);
if (aztGetValue(&qp->diskTime.sec) < 0)
RETURNM("aztGetQChannelInfo 4", -1);
if (aztGetValue(&qp->diskTime.frame) < 0)
RETURNM("aztGetQChannelInfo 4", -1);
}
#ifdef AZT_DEBUG
printk("aztcd: exiting aztGetQChannelInfo Time:%li\n", jiffies);
#endif
return 0;
}
/*
* Read the table of contents (TOC) and TOC header if necessary
*/
static int aztUpdateToc(void)
{
int st;
#ifdef AZT_DEBUG
printk("aztcd: starting aztUpdateToc Time:%li\n", jiffies);
#endif
if (aztTocUpToDate)
return 0;
if (aztGetDiskInfo() < 0)
return -EIO;
if (aztGetToc(0) < 0)
return -EIO;
/*audio disk detection
with my Aztech drive there is no audio status bit, so I use the copy
protection bit of the first track. If this track is copy protected
(copy bit = 0), I assume, it's an audio disk. Strange, but works ??? */
if (!(Toc[DiskInfo.first].ctrl_addr & 0x40))
DiskInfo.audio = 1;
else
DiskInfo.audio = 0;
/* XA detection */
if (!DiskInfo.audio) {
azt_Play.start.min = 0; /*XA detection only seems to work */
azt_Play.start.sec = 2; /*when we play a track */
azt_Play.start.frame = 0;
azt_Play.end.min = 0;
azt_Play.end.sec = 0;
azt_Play.end.frame = 1;
if (sendAztCmd(ACMD_PLAY_READ, &azt_Play))
return -1;
DTEN_LOW;
for (st = 0; st < CD_FRAMESIZE; st++)
inb(DATA_PORT);
}
DiskInfo.xa = getAztStatus() & AST_MODE;
if (DiskInfo.xa) {
printk
("aztcd: XA support experimental - mail results to Werner.Zimmermann@fht-esslingen.de\n");
}
/*multisession detection
support for multisession CDs is done automatically with Aztech drives,
we don't have to take care about TOC redirection; if we want the isofs
to take care about redirection, we have to set AZT_MULTISESSION to 1 */
DiskInfo.multi = 0;
#if AZT_MULTISESSION
if (DiskInfo.xa) {
aztGetMultiDiskInfo(); /*here Disk.Info.multi is set */
}
#endif
if (DiskInfo.multi) {
DiskInfo.lastSession.min = Toc[DiskInfo.next].diskTime.min;
DiskInfo.lastSession.sec = Toc[DiskInfo.next].diskTime.sec;
DiskInfo.lastSession.frame =
Toc[DiskInfo.next].diskTime.frame;
printk("aztcd: Multisession support experimental\n");
} else {
DiskInfo.lastSession.min =
Toc[DiskInfo.first].diskTime.min;
DiskInfo.lastSession.sec =
Toc[DiskInfo.first].diskTime.sec;
DiskInfo.lastSession.frame =
Toc[DiskInfo.first].diskTime.frame;
}
aztTocUpToDate = 1;
#ifdef AZT_DEBUG
printk("aztcd: exiting aztUpdateToc Time:%li\n", jiffies);
#endif
return 0;
}
/* Read the table of contents header, i.e. no. of tracks and start of first
* track
*/
static int aztGetDiskInfo(void)
{
int limit;
unsigned char test;
struct azt_Toc qInfo;
#ifdef AZT_DEBUG
printk("aztcd: starting aztGetDiskInfo Time:%li\n", jiffies);
#endif
if (aztSendCmd(ACMD_SEEK_TO_LEADIN))
RETURNM("aztGetDiskInfo 1", -1);
STEN_LOW_WAIT;
test = 0;
for (limit = 300; limit > 0; limit--) {
if (aztGetQChannelInfo(&qInfo) < 0)
RETURNM("aztGetDiskInfo 2", -1);
if (qInfo.pointIndex == 0xA0) { /*Number of FirstTrack */
DiskInfo.first = qInfo.diskTime.min;
DiskInfo.first = azt_bcd2bin(DiskInfo.first);
test = test | 0x01;
}
if (qInfo.pointIndex == 0xA1) { /*Number of LastTrack */
DiskInfo.last = qInfo.diskTime.min;
DiskInfo.last = azt_bcd2bin(DiskInfo.last);
test = test | 0x02;
}
if (qInfo.pointIndex == 0xA2) { /*DiskLength */
DiskInfo.diskLength.min = qInfo.diskTime.min;
DiskInfo.diskLength.sec = qInfo.diskTime.sec;
DiskInfo.diskLength.frame = qInfo.diskTime.frame;
test = test | 0x04;
}
if ((qInfo.pointIndex == DiskInfo.first) && (test & 0x01)) { /*StartTime of First Track */
DiskInfo.firstTrack.min = qInfo.diskTime.min;
DiskInfo.firstTrack.sec = qInfo.diskTime.sec;
DiskInfo.firstTrack.frame = qInfo.diskTime.frame;
test = test | 0x08;
}
if (test == 0x0F)
break;
}
#ifdef AZT_DEBUG
printk("aztcd: exiting aztGetDiskInfo Time:%li\n", jiffies);
printk
("Disk Info: first %d last %d length %02X:%02X.%02X dez first %02X:%02X.%02X dez\n",
DiskInfo.first, DiskInfo.last, DiskInfo.diskLength.min,
DiskInfo.diskLength.sec, DiskInfo.diskLength.frame,
DiskInfo.firstTrack.min, DiskInfo.firstTrack.sec,
DiskInfo.firstTrack.frame);
#endif
if (test != 0x0F)
return -1;
return 0;
}
#if AZT_MULTISESSION
/*
* Get Multisession Disk Info
*/
static int aztGetMultiDiskInfo(void)
{
int limit, k = 5;
unsigned char test;
struct azt_Toc qInfo;
#ifdef AZT_DEBUG
printk("aztcd: starting aztGetMultiDiskInfo\n");
#endif
do {
azt_Play.start.min = Toc[DiskInfo.last + 1].diskTime.min;
azt_Play.start.sec = Toc[DiskInfo.last + 1].diskTime.sec;
azt_Play.start.frame =
Toc[DiskInfo.last + 1].diskTime.frame;
test = 0;
for (limit = 30; limit > 0; limit--) { /*Seek for LeadIn of next session */
if (aztSeek(&azt_Play))
RETURNM("aztGetMultiDiskInfo 1", -1);
if (aztGetQChannelInfo(&qInfo) < 0)
RETURNM("aztGetMultiDiskInfo 2", -1);
if ((qInfo.track == 0) && (qInfo.pointIndex))
break; /*LeadIn found */
if ((azt_Play.start.sec += 10) > 59) {
azt_Play.start.sec = 0;
azt_Play.start.min++;
}
}
if (!limit)
break; /*Check, if a leadin track was found, if not we're
at the end of the disk */
#ifdef AZT_DEBUG_MULTISESSION
printk("leadin found track %d pointIndex %x limit %d\n",
qInfo.track, qInfo.pointIndex, limit);
#endif
for (limit = 300; limit > 0; limit--) {
if (++azt_Play.start.frame > 74) {
azt_Play.start.frame = 0;
if (azt_Play.start.sec > 59) {
azt_Play.start.sec = 0;
azt_Play.start.min++;
}
}
if (aztSeek(&azt_Play))
RETURNM("aztGetMultiDiskInfo 3", -1);
if (aztGetQChannelInfo(&qInfo) < 0)
RETURNM("aztGetMultiDiskInfo 4", -1);
if (qInfo.pointIndex == 0xA0) { /*Number of NextTrack */
DiskInfo.next = qInfo.diskTime.min;
DiskInfo.next = azt_bcd2bin(DiskInfo.next);
test = test | 0x01;
}
if (qInfo.pointIndex == 0xA1) { /*Number of LastTrack */
DiskInfo.last = qInfo.diskTime.min;
DiskInfo.last = azt_bcd2bin(DiskInfo.last);
test = test | 0x02;
}
if (qInfo.pointIndex == 0xA2) { /*DiskLength */
DiskInfo.diskLength.min =
qInfo.diskTime.min;
DiskInfo.diskLength.sec =
qInfo.diskTime.sec;
DiskInfo.diskLength.frame =
qInfo.diskTime.frame;
test = test | 0x04;
}