Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2494 insertions, 0 deletions

diff --git a/drivers/cdrom/aztcd.c b/drivers/cdrom/aztcd.c
new file mode 100644
index 00000000000..43bf1e5dc38
--- /dev/null
+++ b/drivers/cdrom/aztcd.c
@@ -0,0 +1,2494 @@
+#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 struct timer_list delay_timer = TIMER_INITIALIZER(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(&notUsed))
+		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(&notUsed) < 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;
+			}
+			if ((qInfo.pointIndex == DiskInfo.next) && (test & 0x01)) {	/*StartTime of Next Track */
+				DiskInfo.nextSession.min =
+				    qInfo.diskTime.min;
+				DiskInfo.nextSession.sec =
+				    qInfo.diskTime.sec;
+				DiskInfo.nextSession.frame =
+				    qInfo.diskTime.frame;
+				test = test | 0x08;
+			}
+			if (test == 0x0F)
+				break;
+		}
+#ifdef AZT_DEBUG_MULTISESSION
+		printk
+		    ("MultiDisk Info: first %d next %d last %d length %02x:%02x.%02x dez  first %02x:%02x.%02x dez  next %02x:%02x.%02x dez\n",
+		     DiskInfo.first, DiskInfo.next, DiskInfo.last,
+		     DiskInfo.diskLength.min, DiskInfo.diskLength.sec,
+		     DiskInfo.diskLength.frame, DiskInfo.firstTrack.min,
+		     DiskInfo.firstTrack.sec, DiskInfo.firstTrack.frame,
+		     DiskInfo.nextSession.min, DiskInfo.nextSession.sec,
+		     DiskInfo.nextSession.frame);
+#endif
+		if (test != 0x0F)
+			break;
+		else
+			DiskInfo.multi = 1;	/*found TOC of more than one session */
+		aztGetToc(1);
+	} while (--k);
+
+#ifdef AZT_DEBUG
+	printk("aztcd: exiting aztGetMultiDiskInfo  Time:%li\n", jiffies);
+#endif
+	return 0;
+}
+#endif
+
+/*
+ * Read the table of contents (TOC)
+ */
+static int aztGetToc(int multi)
+{
+	int i, px;
+	int limit;
+	struct azt_Toc qInfo;
+
+#ifdef AZT_DEBUG
+	printk("aztcd: starting aztGetToc  Time:%li\n", jiffies);
+#endif
+	if (!multi) {
+		for (i = 0; i < MAX_TRACKS; i++)
+			Toc[i].pointIndex = 0;
+		i = DiskInfo.last + 3;
+	} else {
+		for (i = DiskInfo.next; i < MAX_TRACKS; i++)
+			Toc[i].pointIndex = 0;
+		i = DiskInfo.last + 4 - DiskInfo.next;
+	}
+
+/*Is there a good reason to stop motor before TOC read?
+  if (aztSendCmd(ACMD_STOP)) RETURNM("aztGetToc 1",-1);
+      STEN_LOW_WAIT;
+*/
+
+	if (!multi) {
+		azt_mode = 0x05;
+		if (aztSendCmd(ACMD_SEEK_TO_LEADIN))
+			RETURNM("aztGetToc 2", -1);
+		STEN_LOW_WAIT;
+	}
+	for (limit = 300; limit > 0; limit--) {
+		if (multi) {
+			if (++azt_Play.start.sec > 59) {
+				azt_Play.start.sec = 0;
+				azt_Play.start.min++;
+			}
+			if (aztSeek(&azt_Play))
+				RETURNM("aztGetToc 3", -1);
+		}
+		if (aztGetQChannelInfo(&qInfo) < 0)
+			break;
+
+		px = azt_bcd2bin(qInfo.pointIndex);
+
+		if (px > 0 && px < MAX_TRACKS && qInfo.track == 0)
+			if (Toc[px].pointIndex == 0) {
+				Toc[px] = qInfo;
+				i--;
+			}
+
+		if (i <= 0)
+			break;
+	}
+
+	Toc[DiskInfo.last + 1].diskTime = DiskInfo.diskLength;
+	Toc[DiskInfo.last].trackTime = DiskInfo.diskLength;
+
+#ifdef AZT_DEBUG_MULTISESSION
+	printk("aztcd: exiting aztGetToc\n");
+	for (i = 1; i <= DiskInfo.last + 1; i++)
+		printk
+		    ("i = %2d ctl-adr = %02X track %2d px %02X %02X:%02X.%02X dez  %02X:%02X.%02X dez\n",
+		     i, Toc[i].ctrl_addr, Toc[i].track, Toc[i].pointIndex,
+		     Toc[i].trackTime.min, Toc[i].trackTime.sec,
+		     Toc[i].trackTime.frame, Toc[i].diskTime.min,
+		     Toc[i].diskTime.sec, Toc[i].diskTime.frame);
+	for (i = 100; i < 103; i++)
+		printk
+		    ("i = %2d ctl-adr = %02X track %2d px %02X %02X:%02X.%02X dez  %02X:%02X.%02X dez\n",
+		     i, Toc[i].ctrl_addr, Toc[i].track, Toc[i].pointIndex,
+		     Toc[i].trackTime.min, Toc[i].trackTime.sec,
+		     Toc[i].trackTime.frame, Toc[i].diskTime.min,
+		     Toc[i].diskTime.sec, Toc[i].diskTime.frame);
+#endif
+
+	return limit > 0 ? 0 : -1;
+}
+
+
+/*##########################################################################
+  Kernel Interface Functions
+  ##########################################################################
+*/
+
+#ifndef MODULE
+static int __init aztcd_setup(char *str)
+{
+	int ints[4];
+
+	(void) get_options(str, ARRAY_SIZE(ints), ints);
+
+	if (ints[0] > 0)
+		azt_port = ints[1];
+	if (ints[1] > 1)
+		azt_cont = ints[2];
+	return 1;
+}
+
+__setup("aztcd=", aztcd_setup);
+
+#endif				/* !MODULE */
+
+/* 
+ * Checking if the media has been changed
+*/
+static int check_aztcd_media_change(struct gendisk *disk)
+{
+	if (aztDiskChanged) {	/* disk changed */
+		aztDiskChanged = 0;
+		return 1;
+	} else
+		return 0;	/* no change */
+}
+
+/*
+ * Kernel IO-controls
+*/
+static int aztcd_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
+		       unsigned long arg)
+{
+	int i;
+	struct azt_Toc qInfo;
+	struct cdrom_ti ti;
+	struct cdrom_tochdr tocHdr;
+	struct cdrom_msf msf;
+	struct cdrom_tocentry entry;
+	struct azt_Toc *tocPtr;
+	struct cdrom_subchnl subchnl;
+	struct cdrom_volctrl volctrl;
+	void __user *argp = (void __user *)arg;
+
+#ifdef AZT_DEBUG
+	printk("aztcd: starting aztcd_ioctl - Command:%x   Time: %li\n",
+	       cmd, jiffies);
+	printk("aztcd Status %x\n", getAztStatus());
+#endif
+	if (!ip)
+		RETURNM("aztcd_ioctl 1", -EINVAL);
+	if (getAztStatus() < 0)
+		RETURNM("aztcd_ioctl 2", -EIO);
+	if ((!aztTocUpToDate) || (aztDiskChanged)) {
+		if ((i = aztUpdateToc()) < 0)
+			RETURNM("aztcd_ioctl 3", i);	/* error reading TOC */
+	}
+
+	switch (cmd) {
+	case CDROMSTART:	/* Spin up the drive. Don't know, what to do,
+				   at least close the tray */
+#if AZT_PRIVATE_IOCTLS
+		if (aztSendCmd(ACMD_CLOSE))
+			RETURNM("aztcd_ioctl 4", -1);
+		STEN_LOW_WAIT;
+#endif
+		break;
+	case CDROMSTOP:	/* Spin down the drive */
+		if (aztSendCmd(ACMD_STOP))
+			RETURNM("aztcd_ioctl 5", -1);
+		STEN_LOW_WAIT;
+		/* should we do anything if it fails? */
+		aztAudioStatus = CDROM_AUDIO_NO_STATUS;
+		break;
+	case CDROMPAUSE:	/* Pause the drive */
+		if (aztAudioStatus != CDROM_AUDIO_PLAY)
+			return -EINVAL;
+
+		if (aztGetQChannelInfo(&qInfo) < 0) {	/* didn't get q channel info */
+			aztAudioStatus = CDROM_AUDIO_NO_STATUS;
+			RETURNM("aztcd_ioctl 7", 0);
+		}
+		azt_Play.start = qInfo.diskTime;	/* remember restart point */
+
+		if (aztSendCmd(ACMD_PAUSE))
+			RETURNM("aztcd_ioctl 8", -1);
+		STEN_LOW_WAIT;
+		aztAudioStatus = CDROM_AUDIO_PAUSED;
+		break;
+	case CDROMRESUME:	/* Play it again, Sam */
+		if (aztAudioStatus != CDROM_AUDIO_PAUSED)
+			return -EINVAL;
+		/* restart the drive at the saved position. */
+		i = aztPlay(&azt_Play);
+		if (i < 0) {
+			aztAudioStatus = CDROM_AUDIO_ERROR;
+			return -EIO;
+		}
+		aztAudioStatus = CDROM_AUDIO_PLAY;
+		break;
+	case CDROMMULTISESSION:	/*multisession support -- experimental */
+		{
+			struct cdrom_multisession ms;
+#ifdef AZT_DEBUG
+			printk("aztcd ioctl MULTISESSION\n");
+#endif
+			if (copy_from_user(&ms, argp,
+			     sizeof(struct cdrom_multisession)))
+				return -EFAULT;
+			if (ms.addr_format == CDROM_MSF) {
+				ms.addr.msf.minute =
+				    azt_bcd2bin(DiskInfo.lastSession.min);
+				ms.addr.msf.second =
+				    azt_bcd2bin(DiskInfo.lastSession.sec);
+				ms.addr.msf.frame =
+				    azt_bcd2bin(DiskInfo.lastSession.
+						frame);
+			} else if (ms.addr_format == CDROM_LBA)
+				ms.addr.lba =
+				    azt_msf2hsg(&DiskInfo.lastSession);
+			else
+				return -EINVAL;
+			ms.xa_flag = DiskInfo.xa;
+			if (copy_to_user(argp, &ms,
+			     sizeof(struct cdrom_multisession)))
+				return -EFAULT;
+#ifdef AZT_DEBUG
+			if (ms.addr_format == CDROM_MSF)
+				printk
+				    ("aztcd multisession xa:%d, msf:%02x:%02x.%02x [%02x:%02x.%02x])\n",
+				     ms.xa_flag, ms.addr.msf.minute,
+				     ms.addr.msf.second, ms.addr.msf.frame,
+				     DiskInfo.lastSession.min,
+				     DiskInfo.lastSession.sec,
+				     DiskInfo.lastSession.frame);
+			else
+				printk
+				    ("aztcd multisession %d, lba:0x%08x [%02x:%02x.%02x])\n",
+				     ms.xa_flag, ms.addr.lba,
+				     DiskInfo.lastSession.min,
+				     DiskInfo.lastSession.sec,
+				     DiskInfo.lastSession.frame);
+#endif
+			return 0;
+		}
+	case CDROMPLAYTRKIND:	/* Play a track.  This currently ignores index. */
+		if (copy_from_user(&ti, argp, sizeof ti))
+			return -EFAULT;
+		if (ti.cdti_trk0 < DiskInfo.first
+		    || ti.cdti_trk0 > DiskInfo.last
+		    || ti.cdti_trk1 < ti.cdti_trk0) {
+			return -EINVAL;
+		}
+		if (ti.cdti_trk1 > DiskInfo.last)
+			ti.cdti_trk1 = DiskInfo.last;
+		azt_Play.start = Toc[ti.cdti_trk0].diskTime;
+		azt_Play.end = Toc[ti.cdti_trk1 + 1].diskTime;
+#ifdef AZT_DEBUG
+		printk("aztcd play: %02x:%02x.%02x to %02x:%02x.%02x\n",
+		       azt_Play.start.min, azt_Play.start.sec,
+		       azt_Play.start.frame, azt_Play.end.min,
+		       azt_Play.end.sec, azt_Play.end.frame);
+#endif
+		i = aztPlay(&azt_Play);
+		if (i < 0) {
+			aztAudioStatus = CDROM_AUDIO_ERROR;
+			return -EIO;
+		}
+		aztAudioStatus = CDROM_AUDIO_PLAY;
+		break;
+	case CDROMPLAYMSF:	/* Play starting at the given MSF address. */
+/*              if (aztAudioStatus == CDROM_AUDIO_PLAY) 
+		{ if (aztSendCmd(ACMD_STOP)) RETURNM("aztcd_ioctl 9",-1);
+		  STEN_LOW;
+		  aztAudioStatus = CDROM_AUDIO_NO_STATUS;
+		}
+*/
+		if (copy_from_user(&msf, argp, sizeof msf))
+			return -EFAULT;
+		/* convert to bcd */
+		azt_bin2bcd(&msf.cdmsf_min0);
+		azt_bin2bcd(&msf.cdmsf_sec0);
+		azt_bin2bcd(&msf.cdmsf_frame0);
+		azt_bin2bcd(&msf.cdmsf_min1);
+		azt_bin2bcd(&msf.cdmsf_sec1);
+		azt_bin2bcd(&msf.cdmsf_frame1);
+		azt_Play.start.min = msf.cdmsf_min0;
+		azt_Play.start.sec = msf.cdmsf_sec0;
+		azt_Play.start.frame = msf.cdmsf_frame0;
+		azt_Play.end.min = msf.cdmsf_min1;
+		azt_Play.end.sec = msf.cdmsf_sec1;
+		azt_Play.end.frame = msf.cdmsf_frame1;
+#ifdef AZT_DEBUG
+		printk("aztcd play: %02x:%02x.%02x to %02x:%02x.%02x\n",
+		       azt_Play.start.min, azt_Play.start.sec,
+		       azt_Play.start.frame, azt_Play.end.min,
+		       azt_Play.end.sec, azt_Play.end.frame);
+#endif
+		i = aztPlay(&azt_Play);
+		if (i < 0) {
+			aztAudioStatus = CDROM_AUDIO_ERROR;
+			return -EIO;
+		}
+		aztAudioStatus = CDROM_AUDIO_PLAY;
+		break;
+
+	case CDROMREADTOCHDR:	/* Read the table of contents header */
+		tocHdr.cdth_trk0 = DiskInfo.first;
+		tocHdr.cdth_trk1 = DiskInfo.last;
+		if (copy_to_user(argp, &tocHdr, sizeof tocHdr))
+			return -EFAULT;
+		break;
+	case CDROMREADTOCENTRY:	/* Read an entry in the table of contents */
+		if (copy_from_user(&entry, argp, sizeof entry))
+			return -EFAULT;
+		if ((!aztTocUpToDate) || aztDiskChanged)
+			aztUpdateToc();
+		if (entry.cdte_track == CDROM_LEADOUT)
+			tocPtr = &Toc[DiskInfo.last + 1];
+		else if (entry.cdte_track > DiskInfo.last
+			 || entry.cdte_track < DiskInfo.first) {
+			return -EINVAL;
+		} else
+			tocPtr = &Toc[entry.cdte_track];
+		entry.cdte_adr = tocPtr->ctrl_addr;
+		entry.cdte_ctrl = tocPtr->ctrl_addr >> 4;
+		if (entry.cdte_format == CDROM_LBA)
+			entry.cdte_addr.lba =
+			    azt_msf2hsg(&tocPtr->diskTime);
+		else if (entry.cdte_format == CDROM_MSF) {
+			entry.cdte_addr.msf.minute =
+			    azt_bcd2bin(tocPtr->diskTime.min);
+			entry.cdte_addr.msf.second =
+			    azt_bcd2bin(tocPtr->diskTime.sec);
+			entry.cdte_addr.msf.frame =
+			    azt_bcd2bin(tocPtr->diskTime.frame);
+		} else {
+			return -EINVAL;
+		}
+		if (copy_to_user(argp, &entry, sizeof entry))
+			return -EFAULT;
+		break;
+	case CDROMSUBCHNL:	/* Get subchannel info */
+		if (copy_from_user
+		    (&subchnl, argp, sizeof(struct cdrom_subchnl)))
+			return -EFAULT;
+		if (aztGetQChannelInfo(&qInfo) < 0) {
+#ifdef AZT_DEBUG
+			printk
+			    ("aztcd: exiting aztcd_ioctl - Error 3 - Command:%x\n",
+			     cmd);
+#endif
+			return -EIO;
+		}
+		subchnl.cdsc_audiostatus = aztAudioStatus;
+		subchnl.cdsc_adr = qInfo.ctrl_addr;
+		subchnl.cdsc_ctrl = qInfo.ctrl_addr >> 4;
+		subchnl.cdsc_trk = azt_bcd2bin(qInfo.track);
+		subchnl.cdsc_ind = azt_bcd2bin(qInfo.pointIndex);
+		if (subchnl.cdsc_format == CDROM_LBA) {
+			subchnl.cdsc_absaddr.lba =
+			    azt_msf2hsg(&qInfo.diskTime);
+			subchnl.cdsc_reladdr.lba =
+			    azt_msf2hsg(&qInfo.trackTime);
+		} else {	/*default */
+			subchnl.cdsc_format = CDROM_MSF;
+			subchnl.cdsc_absaddr.msf.minute =
+			    azt_bcd2bin(qInfo.diskTime.min);
+			subchnl.cdsc_absaddr.msf.second =
+			    azt_bcd2bin(qInfo.diskTime.sec);
+			subchnl.cdsc_absaddr.msf.frame =
+			    azt_bcd2bin(qInfo.diskTime.frame);
+			subchnl.cdsc_reladdr.msf.minute =
+			    azt_bcd2bin(qInfo.trackTime.min);
+			subchnl.cdsc_reladdr.msf.second =
+			    azt_bcd2bin(qInfo.trackTime.sec);
+			subchnl.cdsc_reladdr.msf.frame =
+			    azt_bcd2bin(qInfo.trackTime.frame);
+		}
+		if (copy_to_user(argp, &subchnl, sizeof(struct cdrom_subchnl)))
+			return -EFAULT;
+		break;
+	case CDROMVOLCTRL:	/* Volume control 
+				   * With my Aztech CD268-01A volume control does not work, I can only
+				   turn the channels on (any value !=0) or off (value==0). Maybe it
+				   works better with your drive */
+		if (copy_from_user(&volctrl, argp, sizeof(volctrl)))
+			return -EFAULT;
+		azt_Play.start.min = 0x21;
+		azt_Play.start.sec = 0x84;
+		azt_Play.start.frame = volctrl.channel0;
+		azt_Play.end.min = volctrl.channel1;
+		azt_Play.end.sec = volctrl.channel2;
+		azt_Play.end.frame = volctrl.channel3;
+		sendAztCmd(ACMD_SET_VOLUME, &azt_Play);
+		STEN_LOW_WAIT;
+		break;
+	case CDROMEJECT:
+		aztUnlockDoor();	/* Assume user knows what they're doing */
+		/* all drives can at least stop! */
+		if (aztAudioStatus == CDROM_AUDIO_PLAY) {
+			if (aztSendCmd(ACMD_STOP))
+				RETURNM("azt_ioctl 10", -1);
+			STEN_LOW_WAIT;
+		}
+		if (aztSendCmd(ACMD_EJECT))
+			RETURNM("azt_ioctl 11", -1);
+		STEN_LOW_WAIT;
+		aztAudioStatus = CDROM_AUDIO_NO_STATUS;
+		break;
+	case CDROMEJECT_SW:
+		azt_auto_eject = (char) arg;
+		break;
+	case CDROMRESET:
+		outb(ACMD_SOFT_RESET, CMD_PORT);	/*send reset */
+		STEN_LOW;
+		if (inb(DATA_PORT) != AFL_OP_OK) {	/*OP_OK? */
+			printk
+			    ("aztcd: AZTECH CD-ROM drive does not respond\n");
+		}
+		break;
+/*Take care, the following code is not compatible with other CD-ROM drivers,
+  use it at your own risk with cdplay.c. Set AZT_PRIVATE_IOCTLS to 0 in aztcd.h,
+  if you do not want to use it!
+*/
+#if AZT_PRIVATE_IOCTLS
+	case CDROMREADCOOKED:	/*read data in mode 1 (2048 Bytes) */
+	case CDROMREADRAW:	/*read data in mode 2 (2336 Bytes) */
+		{
+			if (copy_from_user(&msf, argp, sizeof msf))
+				return -EFAULT;
+			/* convert to bcd */
+			azt_bin2bcd(&msf.cdmsf_min0);
+			azt_bin2bcd(&msf.cdmsf_sec0);
+			azt_bin2bcd(&msf.cdmsf_frame0);
+			msf.cdmsf_min1 = 0;
+			msf.cdmsf_sec1 = 0;
+			msf.cdmsf_frame1 = 1;	/*read only one frame */
+			azt_Play.start.min = msf.cdmsf_min0;
+			azt_Play.start.sec = msf.cdmsf_sec0;
+			azt_Play.start.frame = msf.cdmsf_frame0;
+			azt_Play.end.min = msf.cdmsf_min1;
+			azt_Play.end.sec = msf.cdmsf_sec1;
+			azt_Play.end.frame = msf.cdmsf_frame1;
+			if (cmd == CDROMREADRAW) {
+				if (DiskInfo.xa) {
+					return -1;	/*XA Disks can't be read raw */
+				} else {
+					if (sendAztCmd(ACMD_PLAY_READ_RAW, &azt_Play))
+						return -1;
+					DTEN_LOW;
+					insb(DATA_PORT, buf, CD_FRAMESIZE_RAW);
+					if (copy_to_user(argp, &buf, CD_FRAMESIZE_RAW))
+						return -EFAULT;
+				}
+			} else
+				/*CDROMREADCOOKED*/ {
+				if (sendAztCmd(ACMD_PLAY_READ, &azt_Play))
+					return -1;
+				DTEN_LOW;
+				insb(DATA_PORT, buf, CD_FRAMESIZE);
+				if (copy_to_user(argp, &buf, CD_FRAMESIZE))
+					return -EFAULT;
+				}
+		}
+		break;
+	case CDROMSEEK:	/*seek msf address */
+		if (copy_from_user(&msf, argp, sizeof msf))
+			return -EFAULT;
+		/* convert to bcd */
+		azt_bin2bcd(&msf.cdmsf_min0);
+		azt_bin2bcd(&msf.cdmsf_sec0);
+		azt_bin2bcd(&msf.cdmsf_frame0);
+		azt_Play.start.min = msf.cdmsf_min0;
+		azt_Play.start.sec = msf.cdmsf_sec0;
+		azt_Play.start.frame = msf.cdmsf_frame0;
+		if (aztSeek(&azt_Play))
+			return -1;
+		break;
+#endif				/*end of incompatible code */
+	case CDROMREADMODE1:	/*set read data in mode 1 */
+		return aztSetDiskType(AZT_MODE_1);
+	case CDROMREADMODE2:	/*set read data in mode 2 */
+		return aztSetDiskType(AZT_MODE_2);
+	default:
+		return -EINVAL;
+	}
+#ifdef AZT_DEBUG
+	printk("aztcd: exiting aztcd_ioctl Command:%x  Time:%li\n", cmd,
+	       jiffies);
+#endif
+	return 0;
+}
+
+/*
+ * Take care of the different block sizes between cdrom and Linux.
+ * When Linux gets variable block sizes this will probably go away.
+ */
+static void azt_transfer(void)
+{
+#ifdef AZT_TEST
+	printk("aztcd: executing azt_transfer Time:%li\n", jiffies);
+#endif
+	if (!current_valid())
+	        return;
+
+	while (CURRENT->nr_sectors) {
+		int bn = CURRENT->sector / 4;
+		int i;
+		for (i = 0; i < AZT_BUF_SIZ && azt_buf_bn[i] != bn; ++i);
+		if (i < AZT_BUF_SIZ) {
+			int offs = (i * 4 + (CURRENT->sector & 3)) * 512;
+			int nr_sectors = 4 - (CURRENT->sector & 3);
+			if (azt_buf_out != i) {
+				azt_buf_out = i;
+				if (azt_buf_bn[i] != bn) {
+					azt_buf_out = -1;
+					continue;
+				}
+			}
+			if (nr_sectors > CURRENT->nr_sectors)
+			    nr_sectors = CURRENT->nr_sectors;
+			memcpy(CURRENT->buffer, azt_buf + offs,
+				nr_sectors * 512);
+			CURRENT->nr_sectors -= nr_sectors;
+			CURRENT->sector += nr_sectors;
+			CURRENT->buffer += nr_sectors * 512;
+		} else {
+			azt_buf_out = -1;
+			break;
+		}
+	}
+}
+
+static void do_aztcd_request(request_queue_t * q)
+{
+#ifdef AZT_TEST
+	printk(" do_aztcd_request(%ld+%ld) Time:%li\n", CURRENT->sector,
+	       CURRENT->nr_sectors, jiffies);
+#endif
+	if (DiskInfo.audio) {
+		printk("aztcd: Error, tried to mount an Audio CD\n");
+		end_request(CURRENT, 0);
+		return;
+	}
+	azt_transfer_is_active = 1;
+	while (current_valid()) {
+		azt_transfer();
+		if (CURRENT->nr_sectors == 0) {
+			end_request(CURRENT, 1);
+		} else {
+			azt_buf_out = -1;	/* Want to read a block not in buffer */
+			if (azt_state == AZT_S_IDLE) {
+				if ((!aztTocUpToDate) || aztDiskChanged) {
+					if (aztUpdateToc() < 0) {
+						while (current_valid())
+							end_request(CURRENT, 0);
+						break;
+					}
+				}
+				azt_state = AZT_S_START;
+				AztTries = 5;
+				SET_TIMER(azt_poll, HZ / 100);
+			}
+			break;
+		}
+	}
+	azt_transfer_is_active = 0;
+#ifdef AZT_TEST2
+	printk
+	    ("azt_next_bn:%x  azt_buf_in:%x azt_buf_out:%x  azt_buf_bn:%x\n",
+	     azt_next_bn, azt_buf_in, azt_buf_out, azt_buf_bn[azt_buf_in]);
+	printk(" do_aztcd_request ends  Time:%li\n", jiffies);
+#endif
+}
+
+
+static void azt_invalidate_buffers(void)
+{
+	int i;
+
+#ifdef AZT_DEBUG
+	printk("aztcd: executing azt_invalidate_buffers\n");
+#endif
+	for (i = 0; i < AZT_BUF_SIZ; ++i)
+		azt_buf_bn[i] = -1;
+	azt_buf_out = -1;
+}
+
+/*
+ * Open the device special file.  Check that a disk is in.
+ */
+static int aztcd_open(struct inode *ip, struct file *fp)
+{
+	int st;
+
+#ifdef AZT_DEBUG
+	printk("aztcd: starting aztcd_open\n");
+#endif
+
+	if (aztPresent == 0)
+		return -ENXIO;	/* no hardware */
+
+	if (!azt_open_count && azt_state == AZT_S_IDLE) {
+		azt_invalidate_buffers();
+
+		st = getAztStatus();	/* check drive status */
+		if (st == -1)
+			goto err_out;	/* drive doesn't respond */
+
+		if (st & AST_DOOR_OPEN) {	/* close door, then get the status again. */
+			printk("aztcd: Door Open?\n");
+			aztCloseDoor();
+			st = getAztStatus();
+		}
+
+		if ((st & AST_NOT_READY) || (st & AST_DSK_CHG)) {	/*no disk in drive or changed */
+			printk
+			    ("aztcd: Disk Changed or No Disk in Drive?\n");
+			aztTocUpToDate = 0;
+		}
+		if (aztUpdateToc())
+			goto err_out;
+
+	}
+	++azt_open_count;
+	aztLockDoor();
+
+#ifdef AZT_DEBUG
+	printk("aztcd: exiting aztcd_open\n");
+#endif
+	return 0;
+
+      err_out:
+	return -EIO;
+}
+
+
+/*
+ * On close, we flush all azt blocks from the buffer cache.
+ */
+static int aztcd_release(struct inode *inode, struct file *file)
+{
+#ifdef AZT_DEBUG
+	printk("aztcd: executing aztcd_release\n");
+	printk("inode: %p, device: %s    file: %p\n", inode,
+	       inode->i_bdev->bd_disk->disk_name, file);
+#endif
+	if (!--azt_open_count) {
+		azt_invalidate_buffers();
+		aztUnlockDoor();
+		if (azt_auto_eject)
+			aztSendCmd(ACMD_EJECT);
+		CLEAR_TIMER;
+	}
+	return 0;
+}
+
+static struct gendisk *azt_disk;
+
+/*
+ * Test for presence of drive and initialize it.  Called at boot time.
+ */
+
+static int __init aztcd_init(void)
+{
+	long int count, max_count;
+	unsigned char result[50];
+	int st;
+	void* status = NULL;
+	int i = 0;
+	int ret = 0;
+
+	if (azt_port == 0) {
+		printk(KERN_INFO "aztcd: no Aztech CD-ROM Initialization");
+		return -EIO;
+	}
+
+	printk(KERN_INFO "aztcd: AZTECH, ORCHID, OKANO, WEARNES, TXC, CyDROM "
+	       "CD-ROM Driver\n");
+	printk(KERN_INFO "aztcd: (C) 1994-98 W.Zimmermann\n");
+	if (azt_port == -1) {
+		printk
+		    ("aztcd: DriverVersion=%s For IDE/ATAPI-drives use ide-cd.c\n",
+		     AZT_VERSION);
+	} else
+		printk
+		    ("aztcd: DriverVersion=%s BaseAddress=0x%x  For IDE/ATAPI-drives use ide-cd.c\n",
+		     AZT_VERSION, azt_port);
+	printk(KERN_INFO "aztcd: If you have problems, read /usr/src/linux/"
+	       "Documentation/cdrom/aztcd\n");
+
+
+#ifdef AZT_SW32			/*CDROM connected to Soundwave32 card */
+	if ((0xFF00 & inw(AZT_SW32_ID_REG)) != 0x4500) {
+		printk
+		    ("aztcd: no Soundwave32 card detected at base:%x init:%x config:%x id:%x\n",
+		     AZT_SW32_BASE_ADDR, AZT_SW32_INIT,
+		     AZT_SW32_CONFIG_REG, AZT_SW32_ID_REG);
+		return -EIO;
+	} else {
+		printk(KERN_INFO
+		       "aztcd: Soundwave32 card detected at %x  Version %x\n",
+		       AZT_SW32_BASE_ADDR, inw(AZT_SW32_ID_REG));
+		outw(AZT_SW32_INIT, AZT_SW32_CONFIG_REG);
+		for (count = 0; count < 10000; count++);	/*delay a bit */
+	}
+#endif
+
+	/* check for presence of drive */
+
+	if (azt_port == -1) {	/* autoprobing for proprietary interface  */
+		for (i = 0; (azt_port_auto[i] != 0) && (i < 16); i++) {
+			azt_port = azt_port_auto[i];
+			printk(KERN_INFO "aztcd: Autoprobing BaseAddress=0x%x"
+			       "\n", azt_port);
+			 /*proprietary interfaces need 4 bytes */
+			if (!request_region(azt_port, 4, "aztcd")) {
+				continue;
+			}
+			outb(POLLED, MODE_PORT);
+			inb(CMD_PORT);
+			inb(CMD_PORT);
+			outb(ACMD_GET_VERSION, CMD_PORT);	/*Try to get version info */
+
+			aztTimeOutCount = 0;
+			do {
+				aztIndatum = inb(STATUS_PORT);
+				aztTimeOutCount++;
+				if (aztTimeOutCount >= AZT_FAST_TIMEOUT)
+					break;
+			} while (aztIndatum & AFL_STATUS);
+			if (inb(DATA_PORT) == AFL_OP_OK) { /* OK drive found */
+				break;
+			}
+			else {  /* Drive not found on this port - try next one */
+				release_region(azt_port, 4);
+			}
+		}
+		if ((azt_port_auto[i] == 0) || (i == 16)) {
+			printk(KERN_INFO "aztcd: no AZTECH CD-ROM drive found\n");
+			return -EIO;
+		}
+	} else {		/* no autoprobing */
+		if ((azt_port == 0x1f0) || (azt_port == 0x170))
+			status = request_region(azt_port, 8, "aztcd");	/*IDE-interfaces need 8 bytes */
+		else
+			status = request_region(azt_port, 4, "aztcd");	/*proprietary interfaces need 4 bytes */
+		if (!status) {
+			printk(KERN_WARNING "aztcd: conflict, I/O port (%X) "
+			       "already used\n", azt_port);
+			return -EIO;
+		}
+
+		if ((azt_port == 0x1f0) || (azt_port == 0x170))
+			SWITCH_IDE_SLAVE;	/*switch IDE interface to slave configuration */
+
+		outb(POLLED, MODE_PORT);
+		inb(CMD_PORT);
+		inb(CMD_PORT);
+		outb(ACMD_GET_VERSION, CMD_PORT);	/*Try to get version info */
+
+		aztTimeOutCount = 0;
+		do {
+			aztIndatum = inb(STATUS_PORT);
+			aztTimeOutCount++;
+			if (aztTimeOutCount >= AZT_FAST_TIMEOUT)
+				break;
+		} while (aztIndatum & AFL_STATUS);
+
+		if (inb(DATA_PORT) != AFL_OP_OK) {	/*OP_OK? If not, reset and try again */
+#ifndef MODULE
+			if (azt_cont != 0x79) {
+				printk(KERN_WARNING "aztcd: no AZTECH CD-ROM "
+				       "drive found-Try boot parameter aztcd="
+				       "<BaseAddress>,0x79\n");
+				ret = -EIO;
+				goto err_out;
+			}
+#else
+			if (0) {
+			}
+#endif
+			else {
+				printk(KERN_INFO "aztcd: drive reset - "
+				       "please wait\n");
+				for (count = 0; count < 50; count++) {
+					inb(STATUS_PORT);	/*removing all data from earlier tries */
+					inb(DATA_PORT);
+				}
+				outb(POLLED, MODE_PORT);
+				inb(CMD_PORT);
+				inb(CMD_PORT);
+				getAztStatus();	/*trap errors */
+				outb(ACMD_SOFT_RESET, CMD_PORT);	/*send reset */
+				STEN_LOW;
+				if (inb(DATA_PORT) != AFL_OP_OK) {	/*OP_OK? */
+					printk(KERN_WARNING "aztcd: no AZTECH "
+					       "CD-ROM drive found\n");
+					ret = -EIO;
+					goto err_out;
+				}
+
+				for (count = 0; count < AZT_TIMEOUT;
+				     count++)
+					barrier();	/* Stop gcc 2.96 being smart */
+				/* use udelay(), damnit -- AV */
+
+				if ((st = getAztStatus()) == -1) {
+					printk(KERN_WARNING "aztcd: Drive Status"
+					       " Error Status=%x\n", st);
+					ret = -EIO;
+					goto err_out;
+				}
+#ifdef AZT_DEBUG
+				printk(KERN_DEBUG "aztcd: Status = %x\n", st);
+#endif
+				outb(POLLED, MODE_PORT);
+				inb(CMD_PORT);
+				inb(CMD_PORT);
+				outb(ACMD_GET_VERSION, CMD_PORT);	/*GetVersion */
+				STEN_LOW;
+				OP_OK;
+			}
+		}
+	}
+
+	azt_init_end = 1;
+	STEN_LOW;
+	result[0] = inb(DATA_PORT);	/*reading in a null byte??? */
+	for (count = 1; count < 50; count++) {	/*Reading version string */
+		aztTimeOutCount = 0;	/*here we must implement STEN_LOW differently */
+		do {
+			aztIndatum = inb(STATUS_PORT);	/*because we want to exit by timeout */
+			aztTimeOutCount++;
+			if (aztTimeOutCount >= AZT_FAST_TIMEOUT)
+				break;
+		} while (aztIndatum & AFL_STATUS);
+		if (aztTimeOutCount >= AZT_FAST_TIMEOUT)
+			break;	/*all chars read? */
+		result[count] = inb(DATA_PORT);
+	}
+	if (count > 30)
+		max_count = 30;	/*print max.30 chars of the version string */
+	else
+		max_count = count;
+	printk(KERN_INFO "aztcd: FirmwareVersion=");
+	for (count = 1; count < max_count; count++)
+		printk("%c", result[count]);
+	printk("<<>> ");
+
+	if ((result[1] == 'A') && (result[2] == 'Z') && (result[3] == 'T')) {
+		printk("AZTECH drive detected\n");
+	/*AZTECH*/}
+		else if ((result[2] == 'C') && (result[3] == 'D')
+			 && (result[4] == 'D')) {
+		printk("ORCHID or WEARNES drive detected\n");	/*ORCHID or WEARNES */
+	} else if ((result[1] == 0x03) && (result[2] == '5')) {
+		printk("TXC or CyCDROM drive detected\n");	/*Conrad TXC, CyCDROM */
+	} else {		/*OTHERS or none */
+		printk("\nunknown drive or firmware version detected\n");
+		printk
+		    ("aztcd may not run stable, if you want to try anyhow,\n");
+		printk("boot with: aztcd=<BaseAddress>,0x79\n");
+		if ((azt_cont != 0x79)) {
+			printk("aztcd: FirmwareVersion=");
+			for (count = 1; count < 5; count++)
+				printk("%c", result[count]);
+			printk("<<>> ");
+			printk("Aborted\n");
+			ret = -EIO;
+			goto err_out;
+		}
+	}
+	azt_disk = alloc_disk(1);
+	if (!azt_disk)
+		goto err_out;
+
+	if (register_blkdev(MAJOR_NR, "aztcd")) {
+		ret = -EIO;
+		goto err_out2;
+	}
+
+	azt_queue = blk_init_queue(do_aztcd_request, &aztSpin);
+	if (!azt_queue) {
+		ret = -ENOMEM;
+		goto err_out3;
+	}
+
+	blk_queue_hardsect_size(azt_queue, 2048);
+	azt_disk->major = MAJOR_NR;
+	azt_disk->first_minor = 0;
+	azt_disk->fops = &azt_fops;
+	sprintf(azt_disk->disk_name, "aztcd");
+	sprintf(azt_disk->devfs_name, "aztcd");
+	azt_disk->queue = azt_queue;
+	add_disk(azt_disk);
+	azt_invalidate_buffers();
+	aztPresent = 1;
+	aztCloseDoor();
+	return 0;
+err_out3:
+	unregister_blkdev(MAJOR_NR, "aztcd");
+err_out2:
+	put_disk(azt_disk);
+err_out:
+	if ((azt_port == 0x1f0) || (azt_port == 0x170)) {
+		SWITCH_IDE_MASTER;
+		release_region(azt_port, 8);	/*IDE-interface */
+	} else
+		release_region(azt_port, 4);	/*proprietary interface */
+	return ret;
+
+}
+
+static void __exit aztcd_exit(void)
+{
+	del_gendisk(azt_disk);
+	put_disk(azt_disk);
+	if ((unregister_blkdev(MAJOR_NR, "aztcd") == -EINVAL)) {
+		printk("What's that: can't unregister aztcd\n");
+		return;
+	}
+	blk_cleanup_queue(azt_queue);
+	if ((azt_port == 0x1f0) || (azt_port == 0x170)) {
+		SWITCH_IDE_MASTER;
+		release_region(azt_port, 8);	/*IDE-interface */
+	} else
+		release_region(azt_port, 4);	/*proprietary interface */
+	printk(KERN_INFO "aztcd module released.\n");
+}
+
+module_init(aztcd_init);
+module_exit(aztcd_exit);
+
+/*##########################################################################
+  Aztcd State Machine: Controls Drive Operating State
+  ##########################################################################
+*/
+static void azt_poll(void)
+{
+	int st = 0;
+	int loop_ctl = 1;
+	int skip = 0;
+
+	if (azt_error) {
+		if (aztSendCmd(ACMD_GET_ERROR))
+			RETURN("azt_poll 1");
+		STEN_LOW;
+		azt_error = inb(DATA_PORT) & 0xFF;
+		printk("aztcd: I/O error 0x%02x\n", azt_error);
+		azt_invalidate_buffers();
+#ifdef WARN_IF_READ_FAILURE
+		if (AztTries == 5)
+			printk
+			    ("aztcd: Read of Block %d Failed - Maybe Audio Disk?\n",
+			     azt_next_bn);
+#endif
+		if (!AztTries--) {
+			printk
+			    ("aztcd: Read of Block %d Failed, Maybe Audio Disk? Giving up\n",
+			     azt_next_bn);
+			if (azt_transfer_is_active) {
+				AztTries = 0;
+				loop_ctl = 0;
+			}
+			if (current_valid())
+				end_request(CURRENT, 0);
+			AztTries = 5;
+		}
+		azt_error = 0;
+		azt_state = AZT_S_STOP;
+	}
+
+	while (loop_ctl) {
+		loop_ctl = 0;	/* each case must flip this back to 1 if we want
+				   to come back up here */
+		switch (azt_state) {
+
+		case AZT_S_IDLE:
+#ifdef AZT_TEST3
+			if (azt_state != azt_state_old) {
+				azt_state_old = azt_state;
+				printk("AZT_S_IDLE\n");
+			}
+#endif
+			return;
+
+		case AZT_S_START:
+#ifdef AZT_TEST3
+			if (azt_state != azt_state_old) {
+				azt_state_old = azt_state;
+				printk("AZT_S_START\n");
+			}
+#endif
+			if (aztSendCmd(ACMD_GET_STATUS))
+				RETURN("azt_poll 2");	/*result will be checked by aztStatus() */
+			azt_state =
+			    azt_mode == 1 ? AZT_S_READ : AZT_S_MODE;
+			AztTimeout = 3000;
+			break;
+
+		case AZT_S_MODE:
+#ifdef AZT_TEST3
+			if (azt_state != azt_state_old) {
+				azt_state_old = azt_state;
+				printk("AZT_S_MODE\n");
+			}
+#endif
+			if (!skip) {
+				if ((st = aztStatus()) != -1) {
+					if ((st & AST_DSK_CHG)
+					    || (st & AST_NOT_READY)) {
+						aztDiskChanged = 1;
+						aztTocUpToDate = 0;
+						azt_invalidate_buffers();
+						end_request(CURRENT, 0);
+						printk
+						    ("aztcd: Disk Changed or Not Ready 1 - Unmount Disk!\n");
+					}
+				} else
+					break;
+			}
+			skip = 0;
+
+			if ((st & AST_DOOR_OPEN) || (st & AST_NOT_READY)) {
+				aztDiskChanged = 1;
+				aztTocUpToDate = 0;
+				printk
+				    ("aztcd: Disk Changed or Not Ready 2 - Unmount Disk!\n");
+				end_request(CURRENT, 0);
+				printk((st & AST_DOOR_OPEN) ?
+				       "aztcd: door open\n" :
+				       "aztcd: disk removed\n");
+				if (azt_transfer_is_active) {
+					azt_state = AZT_S_START;
+					loop_ctl = 1;	/* goto immediately */
+					break;
+				}
+				azt_state = AZT_S_IDLE;
+				while (current_valid())
+					end_request(CURRENT, 0);
+				return;
+			}
+
+/*	  if (aztSendCmd(ACMD_SET_MODE)) RETURN("azt_poll 3");
+	  outb(0x01, DATA_PORT);
+	  PA_OK;
+	  STEN_LOW;
+*/
+			if (aztSendCmd(ACMD_GET_STATUS))
+				RETURN("azt_poll 4");
+			STEN_LOW;
+			azt_mode = 1;
+			azt_state = AZT_S_READ;
+			AztTimeout = 3000;
+
+			break;
+
+
+		case AZT_S_READ:
+#ifdef AZT_TEST3
+			if (azt_state != azt_state_old) {
+				azt_state_old = azt_state;
+				printk("AZT_S_READ\n");
+			}
+#endif
+			if (!skip) {
+				if ((st = aztStatus()) != -1) {
+					if ((st & AST_DSK_CHG)
+					    || (st & AST_NOT_READY)) {
+						aztDiskChanged = 1;
+						aztTocUpToDate = 0;
+						azt_invalidate_buffers();
+						printk
+						    ("aztcd: Disk Changed or Not Ready 3 - Unmount Disk!\n");
+						end_request(CURRENT, 0);
+					}
+				} else
+					break;
+			}
+
+			skip = 0;
+			if ((st & AST_DOOR_OPEN) || (st & AST_NOT_READY)) {
+				aztDiskChanged = 1;
+				aztTocUpToDate = 0;
+				printk((st & AST_DOOR_OPEN) ?
+				       "aztcd: door open\n" :
+				       "aztcd: disk removed\n");
+				if (azt_transfer_is_active) {
+					azt_state = AZT_S_START;
+					loop_ctl = 1;
+					break;
+				}
+				azt_state = AZT_S_IDLE;
+				while (current_valid())
+					end_request(CURRENT, 0);
+				return;
+			}
+
+			if (current_valid()) {
+				struct azt_Play_msf msf;
+				int i;
+				azt_next_bn = CURRENT->sector / 4;
+				azt_hsg2msf(azt_next_bn, &msf.start);
+				i = 0;
+				/* find out in which track we are */
+				while (azt_msf2hsg(&msf.start) >
+				       azt_msf2hsg(&Toc[++i].trackTime)) {
+				};
+				if (azt_msf2hsg(&msf.start) <
+				    azt_msf2hsg(&Toc[i].trackTime) -
+				    AZT_BUF_SIZ) {
+					azt_read_count = AZT_BUF_SIZ;	/*fast, because we read ahead */
+					/*azt_read_count=CURRENT->nr_sectors;    slow, no read ahead */
+				} else	/* don't read beyond end of track */
+#if AZT_MULTISESSION
+				{
+					azt_read_count =
+					    (azt_msf2hsg(&Toc[i].trackTime)
+					     / 4) * 4 -
+					    azt_msf2hsg(&msf.start);
+					if (azt_read_count < 0)
+						azt_read_count = 0;
+					if (azt_read_count > AZT_BUF_SIZ)
+						azt_read_count =
+						    AZT_BUF_SIZ;
+					printk
+					    ("aztcd: warning - trying to read beyond end of track\n");
+/*               printk("%i %i %li %li\n",i,azt_read_count,azt_msf2hsg(&msf.start),azt_msf2hsg(&Toc[i].trackTime));
+*/ }
+#else
+				{
+					azt_read_count = AZT_BUF_SIZ;
+				}
+#endif
+				msf.end.min = 0;
+				msf.end.sec = 0;
+				msf.end.frame = azt_read_count;	/*Mitsumi here reads 0xffffff sectors */
+#ifdef AZT_TEST3
+				printk
+				    ("---reading msf-address %x:%x:%x  %x:%x:%x\n",
+				     msf.start.min, msf.start.sec,
+				     msf.start.frame, msf.end.min,
+				     msf.end.sec, msf.end.frame);
+				printk
+				    ("azt_next_bn:%x  azt_buf_in:%x azt_buf_out:%x  azt_buf_bn:%x\n",
+				     azt_next_bn, azt_buf_in, azt_buf_out,
+				     azt_buf_bn[azt_buf_in]);
+#endif
+				if (azt_read_mode == AZT_MODE_2) {
+					sendAztCmd(ACMD_PLAY_READ_RAW, &msf);	/*XA disks in raw mode */
+				} else {
+					sendAztCmd(ACMD_PLAY_READ, &msf);	/*others in cooked mode */
+				}
+				azt_state = AZT_S_DATA;
+				AztTimeout = READ_TIMEOUT;
+			} else {
+				azt_state = AZT_S_STOP;
+				loop_ctl = 1;
+				break;
+			}
+
+			break;
+
+
+		case AZT_S_DATA:
+#ifdef AZT_TEST3
+			if (azt_state != azt_state_old) {
+				azt_state_old = azt_state;
+				printk("AZT_S_DATA\n");
+			}
+#endif
+
+			st = inb(STATUS_PORT) & AFL_STATUSorDATA;
+
+			switch (st) {
+
+			case AFL_DATA:
+#ifdef AZT_TEST3
+				if (st != azt_st_old) {
+					azt_st_old = st;
+					printk("---AFL_DATA st:%x\n", st);
+				}
+#endif
+				if (!AztTries--) {
+					printk
+					    ("aztcd: Read of Block %d Failed, Maybe Audio Disk ? Giving up\n",
+					     azt_next_bn);
+					if (azt_transfer_is_active) {
+						AztTries = 0;
+						break;
+					}
+					if (current_valid())
+						end_request(CURRENT, 0);
+					AztTries = 5;
+				}
+				azt_state = AZT_S_START;
+				AztTimeout = READ_TIMEOUT;
+				loop_ctl = 1;
+				break;
+
+			case AFL_STATUSorDATA:
+#ifdef AZT_TEST3
+				if (st != azt_st_old) {
+					azt_st_old = st;
+					printk
+					    ("---AFL_STATUSorDATA st:%x\n",
+					     st);
+				}
+#endif
+				break;
+
+			default:
+#ifdef AZT_TEST3
+				if (st != azt_st_old) {
+					azt_st_old = st;
+					printk("---default: st:%x\n", st);
+				}
+#endif
+				AztTries = 5;
+				if (!current_valid() && azt_buf_in == azt_buf_out) {
+					azt_state = AZT_S_STOP;
+					loop_ctl = 1;
+					break;
+				}
+				if (azt_read_count <= 0)
+					printk
+					    ("aztcd: warning - try to read 0 frames\n");
+				while (azt_read_count) {	/*??? fast read ahead loop */
+					azt_buf_bn[azt_buf_in] = -1;
+					DTEN_LOW;	/*??? unsolved problem, very
+							   seldom we get timeouts
+							   here, don't now the real
+							   reason. With my drive this
+							   sometimes also happens with
+							   Aztech's original driver under
+							   DOS. Is it a hardware bug? 
+							   I tried to recover from such
+							   situations here. Zimmermann */
+					if (aztTimeOutCount >= AZT_TIMEOUT) {
+						printk
+						    ("read_count:%d CURRENT->nr_sectors:%ld azt_buf_in:%d\n",
+						     azt_read_count,
+						     CURRENT->nr_sectors,
+						     azt_buf_in);
+						printk
+						    ("azt_transfer_is_active:%x\n",
+						     azt_transfer_is_active);
+						azt_read_count = 0;
+						azt_state = AZT_S_STOP;
+						loop_ctl = 1;
+						end_request(CURRENT, 1);	/*should we have here (1) or (0)? */
+					} else {
+						if (azt_read_mode ==
+						    AZT_MODE_2) {
+							insb(DATA_PORT,
+							     azt_buf +
+							     CD_FRAMESIZE_RAW
+							     * azt_buf_in,
+							     CD_FRAMESIZE_RAW);
+						} else {
+							insb(DATA_PORT,
+							     azt_buf +
+							     CD_FRAMESIZE *
+							     azt_buf_in,
+							     CD_FRAMESIZE);
+						}
+						azt_read_count--;
+#ifdef AZT_TEST3
+						printk
+						    ("AZT_S_DATA; ---I've read data- read_count: %d\n",
+						     azt_read_count);
+						printk
+						    ("azt_next_bn:%d  azt_buf_in:%d azt_buf_out:%d  azt_buf_bn:%d\n",
+						     azt_next_bn,
+						     azt_buf_in,
+						     azt_buf_out,
+						     azt_buf_bn
+						     [azt_buf_in]);
+#endif
+						azt_buf_bn[azt_buf_in] =
+						    azt_next_bn++;
+						if (azt_buf_out == -1)
+							azt_buf_out =
+							    azt_buf_in;
+						azt_buf_in =
+						    azt_buf_in + 1 ==
+						    AZT_BUF_SIZ ? 0 :
+						    azt_buf_in + 1;
+					}
+				}
+				if (!azt_transfer_is_active) {
+					while (current_valid()) {
+						azt_transfer();
+						if (CURRENT->nr_sectors ==
+						    0)
+							end_request(CURRENT, 1);
+						else
+							break;
+					}
+				}
+
+				if (current_valid()
+				    && (CURRENT->sector / 4 < azt_next_bn
+					|| CURRENT->sector / 4 >
+					azt_next_bn + AZT_BUF_SIZ)) {
+					azt_state = AZT_S_STOP;
+					loop_ctl = 1;
+					break;
+				}
+				AztTimeout = READ_TIMEOUT;
+				if (azt_read_count == 0) {
+					azt_state = AZT_S_STOP;
+					loop_ctl = 1;
+					break;
+				}
+				break;
+			}
+			break;
+
+
+		case AZT_S_STOP:
+#ifdef AZT_TEST3
+			if (azt_state != azt_state_old) {
+				azt_state_old = azt_state;
+				printk("AZT_S_STOP\n");
+			}
+#endif
+			if (azt_read_count != 0)
+				printk("aztcd: discard data=%x frames\n",
+				       azt_read_count);
+			while (azt_read_count != 0) {
+				int i;
+				if (!(inb(STATUS_PORT) & AFL_DATA)) {
+					if (azt_read_mode == AZT_MODE_2)
+						for (i = 0;
+						     i < CD_FRAMESIZE_RAW;
+						     i++)
+							inb(DATA_PORT);
+					else
+						for (i = 0;
+						     i < CD_FRAMESIZE; i++)
+							inb(DATA_PORT);
+				}
+				azt_read_count--;
+			}
+			if (aztSendCmd(ACMD_GET_STATUS))
+				RETURN("azt_poll 5");
+			azt_state = AZT_S_STOPPING;
+			AztTimeout = 1000;
+			break;
+
+		case AZT_S_STOPPING:
+#ifdef AZT_TEST3
+			if (azt_state != azt_state_old) {
+				azt_state_old = azt_state;
+				printk("AZT_S_STOPPING\n");
+			}
+#endif
+
+			if ((st = aztStatus()) == -1 && AztTimeout)
+				break;
+
+			if ((st != -1)
+			    && ((st & AST_DSK_CHG)
+				|| (st & AST_NOT_READY))) {
+				aztDiskChanged = 1;
+				aztTocUpToDate = 0;
+				azt_invalidate_buffers();
+				printk
+				    ("aztcd: Disk Changed or Not Ready 4 - Unmount Disk!\n");
+				end_request(CURRENT, 0);
+			}
+
+#ifdef AZT_TEST3
+			printk("CURRENT_VALID %d azt_mode %d\n",
+			       current_valid(), azt_mode);
+#endif
+
+			if (current_valid()) {
+				if (st != -1) {
+					if (azt_mode == 1) {
+						azt_state = AZT_S_READ;
+						loop_ctl = 1;
+						skip = 1;
+						break;
+					} else {
+						azt_state = AZT_S_MODE;
+						loop_ctl = 1;
+						skip = 1;
+						break;
+					}
+				} else {
+					azt_state = AZT_S_START;
+					AztTimeout = 1;
+				}
+			} else {
+				azt_state = AZT_S_IDLE;
+				return;
+			}
+			break;
+
+		default:
+			printk("aztcd: invalid state %d\n", azt_state);
+			return;
+		}		/* case */
+	}			/* while */
+
+
+	if (!AztTimeout--) {
+		printk("aztcd: timeout in state %d\n", azt_state);
+		azt_state = AZT_S_STOP;
+		if (aztSendCmd(ACMD_STOP))
+			RETURN("azt_poll 6");
+		STEN_LOW_WAIT;
+	};
+
+	SET_TIMER(azt_poll, HZ / 100);
+}
+
+
+/*###########################################################################
+ * Miscellaneous support functions
+  ###########################################################################
+*/
+static void azt_hsg2msf(long hsg, struct msf *msf)
+{
+	hsg += 150;
+	msf->min = hsg / 4500;
+	hsg %= 4500;
+	msf->sec = hsg / 75;
+	msf->frame = hsg % 75;
+#ifdef AZT_DEBUG
+	if (msf->min >= 70)
+		printk("aztcd: Error hsg2msf address Minutes\n");
+	if (msf->sec >= 60)
+		printk("aztcd: Error hsg2msf address Seconds\n");
+	if (msf->frame >= 75)
+		printk("aztcd: Error hsg2msf address Frames\n");
+#endif
+	azt_bin2bcd(&msf->min);	/* convert to BCD */
+	azt_bin2bcd(&msf->sec);
+	azt_bin2bcd(&msf->frame);
+}
+
+static long azt_msf2hsg(struct msf *mp)
+{
+	return azt_bcd2bin(mp->frame) + azt_bcd2bin(mp->sec) * 75
+	    + azt_bcd2bin(mp->min) * 4500 - CD_MSF_OFFSET;
+}
+
+static void azt_bin2bcd(unsigned char *p)
+{
+	int u, t;
+
+	u = *p % 10;
+	t = *p / 10;
+	*p = u | (t << 4);
+}
+
+static int azt_bcd2bin(unsigned char bcd)
+{
+	return (bcd >> 4) * 10 + (bcd & 0xF);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_BLOCKDEV_MAJOR(AZTECH_CDROM_MAJOR);