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, 1817 insertions, 0 deletions

diff --git a/drivers/cdrom/sjcd.c b/drivers/cdrom/sjcd.c
new file mode 100644
index 000000000000..4e7a342ec36f
--- /dev/null
+++ b/drivers/cdrom/sjcd.c
@@ -0,0 +1,1817 @@
+/* -- sjcd.c
+ *
+ *   Sanyo CD-ROM device driver implementation, Version 1.6
+ *   Copyright (C) 1995  Vadim V. Model
+ *
+ *   model@cecmow.enet.dec.com
+ *   vadim@rbrf.ru
+ *   vadim@ipsun.ras.ru
+ *
+ *
+ *  This driver is based on pre-works by Eberhard Moenkeberg (emoenke@gwdg.de);
+ *  it was developed under use of mcd.c from Martin Harriss, with help of
+ *  Eric van der Maarel (H.T.M.v.d.Maarel@marin.nl).
+ *
+ *  It is planned to include these routines into sbpcd.c later - to make
+ *  a "mixed use" on one cable possible for all kinds of drives which use
+ *  the SoundBlaster/Panasonic style CDROM interface. But today, the
+ *  ability to install directly from CDROM is more important than flexibility.
+ *
+ *  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 of the License, 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:
+ *  1.1 First public release with kernel version 1.3.7.
+ *      Written by Vadim Model.
+ *  1.2 Added detection and configuration of cdrom interface
+ *      on ISP16 soundcard.
+ *      Allow for command line options: sjcd=<io_base>,<irq>,<dma>
+ *  1.3 Some minor changes to README.sjcd.
+ *  1.4 MSS Sound support!! Listen to a CD through the speakers.
+ *  1.5 Module support and bugfixes.
+ *      Tray locking.
+ *  1.6 Removed ISP16 code from this driver.
+ *      Allow only to set io base address on command line: sjcd=<io_base>
+ *      Changes to Documentation/cdrom/sjcd
+ *      Added cleanup after any error in the initialisation.
+ *  1.7 Added code to set the sector size tables to prevent the bug present in 
+ *      the previous version of this driver.  Coded added by Anthony Barbachan 
+ *      from bugfix tip originally suggested by Alan Cox.
+ *
+ *  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>
+ */
+
+#define SJCD_VERSION_MAJOR 1
+#define SJCD_VERSION_MINOR 7
+
+#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>
+#include <linux/blkdev.h>
+#include "sjcd.h"
+
+static int sjcd_present = 0;
+static struct request_queue *sjcd_queue;
+
+#define MAJOR_NR SANYO_CDROM_MAJOR
+#define QUEUE (sjcd_queue)
+#define CURRENT elv_next_request(sjcd_queue)
+
+#define SJCD_BUF_SIZ 32		/* cdr-h94a has internal 64K buffer */
+
+/*
+ * buffer for block size conversion
+ */
+static char sjcd_buf[2048 * SJCD_BUF_SIZ];
+static volatile int sjcd_buf_bn[SJCD_BUF_SIZ], sjcd_next_bn;
+static volatile int sjcd_buf_in, sjcd_buf_out = -1;
+
+/*
+ * Status.
+ */
+static unsigned short sjcd_status_valid = 0;
+static unsigned short sjcd_door_closed;
+static unsigned short sjcd_door_was_open;
+static unsigned short sjcd_media_is_available;
+static unsigned short sjcd_media_is_changed;
+static unsigned short sjcd_toc_uptodate = 0;
+static unsigned short sjcd_command_failed;
+static volatile unsigned char sjcd_completion_status = 0;
+static volatile unsigned char sjcd_completion_error = 0;
+static unsigned short sjcd_command_is_in_progress = 0;
+static unsigned short sjcd_error_reported = 0;
+static DEFINE_SPINLOCK(sjcd_lock);
+
+static int sjcd_open_count;
+
+static int sjcd_audio_status;
+static struct sjcd_play_msf sjcd_playing;
+
+static int sjcd_base = SJCD_BASE_ADDR;
+
+module_param(sjcd_base, int, 0);
+
+static DECLARE_WAIT_QUEUE_HEAD(sjcd_waitq);
+
+/*
+ * Data transfer.
+ */
+static volatile unsigned short sjcd_transfer_is_active = 0;
+
+enum sjcd_transfer_state {
+	SJCD_S_IDLE = 0,
+	SJCD_S_START = 1,
+	SJCD_S_MODE = 2,
+	SJCD_S_READ = 3,
+	SJCD_S_DATA = 4,
+	SJCD_S_STOP = 5,
+	SJCD_S_STOPPING = 6
+};
+static enum sjcd_transfer_state sjcd_transfer_state = SJCD_S_IDLE;
+static long sjcd_transfer_timeout = 0;
+static int sjcd_read_count = 0;
+static unsigned char sjcd_mode = 0;
+
+#define SJCD_READ_TIMEOUT 5000
+
+#if defined( SJCD_GATHER_STAT )
+/*
+ * Statistic.
+ */
+static struct sjcd_stat statistic;
+#endif
+
+/*
+ * Timer.
+ */
+static struct timer_list sjcd_delay_timer = TIMER_INITIALIZER(NULL, 0, 0);
+
+#define SJCD_SET_TIMER( func, tmout )           \
+    ( sjcd_delay_timer.expires = jiffies+tmout,         \
+      sjcd_delay_timer.function = ( void * )func, \
+      add_timer( &sjcd_delay_timer ) )
+
+#define CLEAR_TIMER del_timer( &sjcd_delay_timer )
+
+/*
+ * Set up device, i.e., use command line data to set
+ * base address.
+ */
+#ifndef MODULE
+static int __init sjcd_setup(char *str)
+{
+	int ints[2];
+	(void) get_options(str, ARRAY_SIZE(ints), ints);
+	if (ints[0] > 0)
+		sjcd_base = ints[1];
+
+	return 1;
+}
+
+__setup("sjcd=", sjcd_setup);
+
+#endif
+
+/*
+ * Special converters.
+ */
+static unsigned char bin2bcd(int bin)
+{
+	int u, v;
+
+	u = bin % 10;
+	v = bin / 10;
+	return (u | (v << 4));
+}
+
+static int bcd2bin(unsigned char bcd)
+{
+	return ((bcd >> 4) * 10 + (bcd & 0x0F));
+}
+
+static long msf2hsg(struct msf *mp)
+{
+	return (bcd2bin(mp->frame) + bcd2bin(mp->sec) * 75
+		+ bcd2bin(mp->min) * 4500 - 150);
+}
+
+static void hsg2msf(long hsg, struct msf *msf)
+{
+	hsg += 150;
+	msf->min = hsg / 4500;
+	hsg %= 4500;
+	msf->sec = hsg / 75;
+	msf->frame = hsg % 75;
+	msf->min = bin2bcd(msf->min);	/* convert to BCD */
+	msf->sec = bin2bcd(msf->sec);
+	msf->frame = bin2bcd(msf->frame);
+}
+
+/*
+ * Send a command to cdrom. Invalidate status.
+ */
+static void sjcd_send_cmd(unsigned char cmd)
+{
+#if defined( SJCD_TRACE )
+	printk("SJCD: send_cmd( 0x%x )\n", cmd);
+#endif
+	outb(cmd, SJCDPORT(0));
+	sjcd_command_is_in_progress = 1;
+	sjcd_status_valid = 0;
+	sjcd_command_failed = 0;
+}
+
+/*
+ * Send a command with one arg to cdrom. Invalidate status.
+ */
+static void sjcd_send_1_cmd(unsigned char cmd, unsigned char a)
+{
+#if defined( SJCD_TRACE )
+	printk("SJCD: send_1_cmd( 0x%x, 0x%x )\n", cmd, a);
+#endif
+	outb(cmd, SJCDPORT(0));
+	outb(a, SJCDPORT(0));
+	sjcd_command_is_in_progress = 1;
+	sjcd_status_valid = 0;
+	sjcd_command_failed = 0;
+}
+
+/*
+ * Send a command with four args to cdrom. Invalidate status.
+ */
+static void sjcd_send_4_cmd(unsigned char cmd, unsigned char a,
+			    unsigned char b, unsigned char c,
+			    unsigned char d)
+{
+#if defined( SJCD_TRACE )
+	printk("SJCD: send_4_cmd( 0x%x )\n", cmd);
+#endif
+	outb(cmd, SJCDPORT(0));
+	outb(a, SJCDPORT(0));
+	outb(b, SJCDPORT(0));
+	outb(c, SJCDPORT(0));
+	outb(d, SJCDPORT(0));
+	sjcd_command_is_in_progress = 1;
+	sjcd_status_valid = 0;
+	sjcd_command_failed = 0;
+}
+
+/*
+ * Send a play or read command to cdrom. Invalidate Status.
+ */
+static void sjcd_send_6_cmd(unsigned char cmd, struct sjcd_play_msf *pms)
+{
+#if defined( SJCD_TRACE )
+	printk("SJCD: send_long_cmd( 0x%x )\n", cmd);
+#endif
+	outb(cmd, SJCDPORT(0));
+	outb(pms->start.min, SJCDPORT(0));
+	outb(pms->start.sec, SJCDPORT(0));
+	outb(pms->start.frame, SJCDPORT(0));
+	outb(pms->end.min, SJCDPORT(0));
+	outb(pms->end.sec, SJCDPORT(0));
+	outb(pms->end.frame, SJCDPORT(0));
+	sjcd_command_is_in_progress = 1;
+	sjcd_status_valid = 0;
+	sjcd_command_failed = 0;
+}
+
+/*
+ * Get a value from the data port. Should not block, so we use a little
+ * wait for a while. Returns 0 if OK.
+ */
+static int sjcd_load_response(void *buf, int len)
+{
+	unsigned char *resp = (unsigned char *) buf;
+
+	for (; len; --len) {
+		int i;
+		for (i = 200;
+		     i-- && !SJCD_STATUS_AVAILABLE(inb(SJCDPORT(1))););
+		if (i > 0)
+			*resp++ = (unsigned char) inb(SJCDPORT(0));
+		else
+			break;
+	}
+	return (len);
+}
+
+/*
+ * Load and parse command completion status (drive info byte and maybe error).
+ * Sorry, no error classification yet.
+ */
+static void sjcd_load_status(void)
+{
+	sjcd_media_is_changed = 0;
+	sjcd_completion_error = 0;
+	sjcd_completion_status = inb(SJCDPORT(0));
+	if (sjcd_completion_status & SST_DOOR_OPENED) {
+		sjcd_door_closed = sjcd_media_is_available = 0;
+	} else {
+		sjcd_door_closed = 1;
+		if (sjcd_completion_status & SST_MEDIA_CHANGED)
+			sjcd_media_is_available = sjcd_media_is_changed =
+			    1;
+		else if (sjcd_completion_status & 0x0F) {
+			/*
+			 * OK, we seem to catch an error ...
+			 */
+			while (!SJCD_STATUS_AVAILABLE(inb(SJCDPORT(1))));
+			sjcd_completion_error = inb(SJCDPORT(0));
+			if ((sjcd_completion_status & 0x08) &&
+			    (sjcd_completion_error & 0x40))
+				sjcd_media_is_available = 0;
+			else
+				sjcd_command_failed = 1;
+		} else
+			sjcd_media_is_available = 1;
+	}
+	/*
+	 * Ok, status loaded successfully.
+	 */
+	sjcd_status_valid = 1, sjcd_error_reported = 0;
+	sjcd_command_is_in_progress = 0;
+
+	/*
+	 * If the disk is changed, the TOC is not valid.
+	 */
+	if (sjcd_media_is_changed)
+		sjcd_toc_uptodate = 0;
+#if defined( SJCD_TRACE )
+	printk("SJCD: status %02x.%02x loaded.\n",
+	       (int) sjcd_completion_status, (int) sjcd_completion_error);
+#endif
+}
+
+/*
+ * Read status from cdrom. Check to see if the status is available.
+ */
+static int sjcd_check_status(void)
+{
+	/*
+	 * Try to load the response from cdrom into buffer.
+	 */
+	if (SJCD_STATUS_AVAILABLE(inb(SJCDPORT(1)))) {
+		sjcd_load_status();
+		return (1);
+	} else {
+		/*
+		 * No status is available.
+		 */
+		return (0);
+	}
+}
+
+/*
+ * This is just timeout counter, and nothing more. Surprised ? :-)
+ */
+static volatile long sjcd_status_timeout;
+
+/*
+ * We need about 10 seconds to wait. The longest command takes about 5 seconds
+ * to probe the disk (usually after tray closed or drive reset). Other values
+ * should be thought of for other commands.
+ */
+#define SJCD_WAIT_FOR_STATUS_TIMEOUT 1000
+
+static void sjcd_status_timer(void)
+{
+	if (sjcd_check_status()) {
+		/*
+		 * The command completed and status is loaded, stop waiting.
+		 */
+		wake_up(&sjcd_waitq);
+	} else if (--sjcd_status_timeout <= 0) {
+		/*
+		 * We are timed out. 
+		 */
+		wake_up(&sjcd_waitq);
+	} else {
+		/*
+		 * We have still some time to wait. Try again.
+		 */
+		SJCD_SET_TIMER(sjcd_status_timer, 1);
+	}
+}
+
+/*
+ * Wait for status for 10 sec approx. Returns non-positive when timed out.
+ * Should not be used while reading data CDs.
+ */
+static int sjcd_wait_for_status(void)
+{
+	sjcd_status_timeout = SJCD_WAIT_FOR_STATUS_TIMEOUT;
+	SJCD_SET_TIMER(sjcd_status_timer, 1);
+	sleep_on(&sjcd_waitq);
+#if defined( SJCD_DIAGNOSTIC ) || defined ( SJCD_TRACE )
+	if (sjcd_status_timeout <= 0)
+		printk("SJCD: Error Wait For Status.\n");
+#endif
+	return (sjcd_status_timeout);
+}
+
+static int sjcd_receive_status(void)
+{
+	int i;
+#if defined( SJCD_TRACE )
+	printk("SJCD: receive_status\n");
+#endif
+	/*
+	 * Wait a bit for status available.
+	 */
+	for (i = 200; i-- && (sjcd_check_status() == 0););
+	if (i < 0) {
+#if defined( SJCD_TRACE )
+		printk("SJCD: long wait for status\n");
+#endif
+		if (sjcd_wait_for_status() <= 0)
+			printk("SJCD: Timeout when read status.\n");
+		else
+			i = 0;
+	}
+	return (i);
+}
+
+/*
+ * Load the status. Issue get status command and wait for status available.
+ */
+static void sjcd_get_status(void)
+{
+#if defined( SJCD_TRACE )
+	printk("SJCD: get_status\n");
+#endif
+	sjcd_send_cmd(SCMD_GET_STATUS);
+	sjcd_receive_status();
+}
+
+/*
+ * Check the drive if the disk is changed. Should be revised.
+ */
+static int sjcd_disk_change(struct gendisk *disk)
+{
+#if 0
+	printk("SJCD: sjcd_disk_change(%s)\n", disk->disk_name);
+#endif
+	if (!sjcd_command_is_in_progress)
+		sjcd_get_status();
+	return (sjcd_status_valid ? sjcd_media_is_changed : 0);
+}
+
+/*
+ * Read the table of contents (TOC) and TOC header if necessary.
+ * We assume that the drive contains no more than 99 toc entries.
+ */
+static struct sjcd_hw_disk_info sjcd_table_of_contents[SJCD_MAX_TRACKS];
+static unsigned char sjcd_first_track_no, sjcd_last_track_no;
+#define sjcd_disk_length  sjcd_table_of_contents[0].un.track_msf
+
+static int sjcd_update_toc(void)
+{
+	struct sjcd_hw_disk_info info;
+	int i;
+#if defined( SJCD_TRACE )
+	printk("SJCD: update toc:\n");
+#endif
+	/*
+	 * check to see if we need to do anything
+	 */
+	if (sjcd_toc_uptodate)
+		return (0);
+
+	/*
+	 * Get the TOC start information.
+	 */
+	sjcd_send_1_cmd(SCMD_GET_DISK_INFO, SCMD_GET_1_TRACK);
+	sjcd_receive_status();
+
+	if (!sjcd_status_valid) {
+		printk("SJCD: cannot load status.\n");
+		return (-1);
+	}
+
+	if (!sjcd_media_is_available) {
+		printk("SJCD: no disk in drive\n");
+		return (-1);
+	}
+
+	if (!sjcd_command_failed) {
+		if (sjcd_load_response(&info, sizeof(info)) != 0) {
+			printk
+			    ("SJCD: cannot load response about TOC start.\n");
+			return (-1);
+		}
+		sjcd_first_track_no = bcd2bin(info.un.track_no);
+	} else {
+		printk("SJCD: get first failed\n");
+		return (-1);
+	}
+#if defined( SJCD_TRACE )
+	printk("SJCD: TOC start 0x%02x ", sjcd_first_track_no);
+#endif
+	/*
+	 * Get the TOC finish information.
+	 */
+	sjcd_send_1_cmd(SCMD_GET_DISK_INFO, SCMD_GET_L_TRACK);
+	sjcd_receive_status();
+
+	if (!sjcd_status_valid) {
+		printk("SJCD: cannot load status.\n");
+		return (-1);
+	}
+
+	if (!sjcd_media_is_available) {
+		printk("SJCD: no disk in drive\n");
+		return (-1);
+	}
+
+	if (!sjcd_command_failed) {
+		if (sjcd_load_response(&info, sizeof(info)) != 0) {
+			printk
+			    ("SJCD: cannot load response about TOC finish.\n");
+			return (-1);
+		}
+		sjcd_last_track_no = bcd2bin(info.un.track_no);
+	} else {
+		printk("SJCD: get last failed\n");
+		return (-1);
+	}
+#if defined( SJCD_TRACE )
+	printk("SJCD: TOC finish 0x%02x ", sjcd_last_track_no);
+#endif
+	for (i = sjcd_first_track_no; i <= sjcd_last_track_no; i++) {
+		/*
+		 * Get the first track information.
+		 */
+		sjcd_send_1_cmd(SCMD_GET_DISK_INFO, bin2bcd(i));
+		sjcd_receive_status();
+
+		if (!sjcd_status_valid) {
+			printk("SJCD: cannot load status.\n");
+			return (-1);
+		}
+
+		if (!sjcd_media_is_available) {
+			printk("SJCD: no disk in drive\n");
+			return (-1);
+		}
+
+		if (!sjcd_command_failed) {
+			if (sjcd_load_response(&sjcd_table_of_contents[i],
+					       sizeof(struct
+						      sjcd_hw_disk_info))
+			    != 0) {
+				printk
+				    ("SJCD: cannot load info for %d track\n",
+				     i);
+				return (-1);
+			}
+		} else {
+			printk("SJCD: get info %d failed\n", i);
+			return (-1);
+		}
+	}
+
+	/*
+	 * Get the disk length info.
+	 */
+	sjcd_send_1_cmd(SCMD_GET_DISK_INFO, SCMD_GET_D_SIZE);
+	sjcd_receive_status();
+
+	if (!sjcd_status_valid) {
+		printk("SJCD: cannot load status.\n");
+		return (-1);
+	}
+
+	if (!sjcd_media_is_available) {
+		printk("SJCD: no disk in drive\n");
+		return (-1);
+	}
+
+	if (!sjcd_command_failed) {
+		if (sjcd_load_response(&info, sizeof(info)) != 0) {
+			printk
+			    ("SJCD: cannot load response about disk size.\n");
+			return (-1);
+		}
+		sjcd_disk_length.min = info.un.track_msf.min;
+		sjcd_disk_length.sec = info.un.track_msf.sec;
+		sjcd_disk_length.frame = info.un.track_msf.frame;
+	} else {
+		printk("SJCD: get size failed\n");
+		return (1);
+	}
+#if defined( SJCD_TRACE )
+	printk("SJCD: (%02x:%02x.%02x)\n", sjcd_disk_length.min,
+	       sjcd_disk_length.sec, sjcd_disk_length.frame);
+#endif
+	return (0);
+}
+
+/*
+ * Load subchannel information.
+ */
+static int sjcd_get_q_info(struct sjcd_hw_qinfo *qp)
+{
+	int s;
+#if defined( SJCD_TRACE )
+	printk("SJCD: load sub q\n");
+#endif
+	sjcd_send_cmd(SCMD_GET_QINFO);
+	s = sjcd_receive_status();
+	if (s < 0 || sjcd_command_failed || !sjcd_status_valid) {
+		sjcd_send_cmd(0xF2);
+		s = sjcd_receive_status();
+		if (s < 0 || sjcd_command_failed || !sjcd_status_valid)
+			return (-1);
+		sjcd_send_cmd(SCMD_GET_QINFO);
+		s = sjcd_receive_status();
+		if (s < 0 || sjcd_command_failed || !sjcd_status_valid)
+			return (-1);
+	}
+	if (sjcd_media_is_available)
+		if (sjcd_load_response(qp, sizeof(*qp)) == 0)
+			return (0);
+	return (-1);
+}
+
+/*
+ * Start playing from the specified position.
+ */
+static int sjcd_play(struct sjcd_play_msf *mp)
+{
+	struct sjcd_play_msf msf;
+
+	/*
+	 * Turn the device to play mode.
+	 */
+	sjcd_send_1_cmd(SCMD_SET_MODE, SCMD_MODE_PLAY);
+	if (sjcd_receive_status() < 0)
+		return (-1);
+
+	/*
+	 * Seek to the starting point.
+	 */
+	msf.start = mp->start;
+	msf.end.min = msf.end.sec = msf.end.frame = 0x00;
+	sjcd_send_6_cmd(SCMD_SEEK, &msf);
+	if (sjcd_receive_status() < 0)
+		return (-1);
+
+	/*
+	 * Start playing.
+	 */
+	sjcd_send_6_cmd(SCMD_PLAY, mp);
+	return (sjcd_receive_status());
+}
+
+/*
+ * Tray control functions.
+ */
+static int sjcd_tray_close(void)
+{
+#if defined( SJCD_TRACE )
+	printk("SJCD: tray_close\n");
+#endif
+	sjcd_send_cmd(SCMD_CLOSE_TRAY);
+	return (sjcd_receive_status());
+}
+
+static int sjcd_tray_lock(void)
+{
+#if defined( SJCD_TRACE )
+	printk("SJCD: tray_lock\n");
+#endif
+	sjcd_send_cmd(SCMD_LOCK_TRAY);
+	return (sjcd_receive_status());
+}
+
+static int sjcd_tray_unlock(void)
+{
+#if defined( SJCD_TRACE )
+	printk("SJCD: tray_unlock\n");
+#endif
+	sjcd_send_cmd(SCMD_UNLOCK_TRAY);
+	return (sjcd_receive_status());
+}
+
+static int sjcd_tray_open(void)
+{
+#if defined( SJCD_TRACE )
+	printk("SJCD: tray_open\n");
+#endif
+	sjcd_send_cmd(SCMD_EJECT_TRAY);
+	return (sjcd_receive_status());
+}
+
+/*
+ * Do some user commands.
+ */
+static int sjcd_ioctl(struct inode *ip, struct file *fp,
+		      unsigned int cmd, unsigned long arg)
+{
+	void __user *argp = (void __user *)arg;
+#if defined( SJCD_TRACE )
+	printk("SJCD:ioctl\n");
+#endif
+
+	sjcd_get_status();
+	if (!sjcd_status_valid)
+		return (-EIO);
+	if (sjcd_update_toc() < 0)
+		return (-EIO);
+
+	switch (cmd) {
+	case CDROMSTART:{
+#if defined( SJCD_TRACE )
+			printk("SJCD: ioctl: start\n");
+#endif
+			return (0);
+		}
+
+	case CDROMSTOP:{
+#if defined( SJCD_TRACE )
+			printk("SJCD: ioctl: stop\n");
+#endif
+			sjcd_send_cmd(SCMD_PAUSE);
+			(void) sjcd_receive_status();
+			sjcd_audio_status = CDROM_AUDIO_NO_STATUS;
+			return (0);
+		}
+
+	case CDROMPAUSE:{
+			struct sjcd_hw_qinfo q_info;
+#if defined( SJCD_TRACE )
+			printk("SJCD: ioctl: pause\n");
+#endif
+			if (sjcd_audio_status == CDROM_AUDIO_PLAY) {
+				sjcd_send_cmd(SCMD_PAUSE);
+				(void) sjcd_receive_status();
+				if (sjcd_get_q_info(&q_info) < 0) {
+					sjcd_audio_status =
+					    CDROM_AUDIO_NO_STATUS;
+				} else {
+					sjcd_audio_status =
+					    CDROM_AUDIO_PAUSED;
+					sjcd_playing.start = q_info.abs;
+				}
+				return (0);
+			} else
+				return (-EINVAL);
+		}
+
+	case CDROMRESUME:{
+#if defined( SJCD_TRACE )
+			printk("SJCD: ioctl: resume\n");
+#endif
+			if (sjcd_audio_status == CDROM_AUDIO_PAUSED) {
+				/*
+				 * continue play starting at saved location
+				 */
+				if (sjcd_play(&sjcd_playing) < 0) {
+					sjcd_audio_status =
+					    CDROM_AUDIO_ERROR;
+					return (-EIO);
+				} else {
+					sjcd_audio_status =
+					    CDROM_AUDIO_PLAY;
+					return (0);
+				}
+			} else
+				return (-EINVAL);
+		}
+
+	case CDROMPLAYTRKIND:{
+			struct cdrom_ti ti;
+			int s = -EFAULT;
+#if defined( SJCD_TRACE )
+			printk("SJCD: ioctl: playtrkind\n");
+#endif
+			if (!copy_from_user(&ti, argp, sizeof(ti))) {
+				s = 0;
+				if (ti.cdti_trk0 < sjcd_first_track_no)
+					return (-EINVAL);
+				if (ti.cdti_trk1 > sjcd_last_track_no)
+					ti.cdti_trk1 = sjcd_last_track_no;
+				if (ti.cdti_trk0 > ti.cdti_trk1)
+					return (-EINVAL);
+
+				sjcd_playing.start =
+				    sjcd_table_of_contents[ti.cdti_trk0].
+				    un.track_msf;
+				sjcd_playing.end =
+				    (ti.cdti_trk1 <
+				     sjcd_last_track_no) ?
+				    sjcd_table_of_contents[ti.cdti_trk1 +
+							   1].un.
+				    track_msf : sjcd_table_of_contents[0].
+				    un.track_msf;
+
+				if (sjcd_play(&sjcd_playing) < 0) {
+					sjcd_audio_status =
+					    CDROM_AUDIO_ERROR;
+					return (-EIO);
+				} else
+					sjcd_audio_status =
+					    CDROM_AUDIO_PLAY;
+			}
+			return (s);
+		}
+
+	case CDROMPLAYMSF:{
+			struct cdrom_msf sjcd_msf;
+			int s;
+#if defined( SJCD_TRACE )
+			printk("SJCD: ioctl: playmsf\n");
+#endif
+			if ((s =
+			     access_ok(VERIFY_READ, argp, sizeof(sjcd_msf))
+			     		? 0 : -EFAULT) == 0) {
+				if (sjcd_audio_status == CDROM_AUDIO_PLAY) {
+					sjcd_send_cmd(SCMD_PAUSE);
+					(void) sjcd_receive_status();
+					sjcd_audio_status =
+					    CDROM_AUDIO_NO_STATUS;
+				}
+
+				if (copy_from_user(&sjcd_msf, argp,
+					       sizeof(sjcd_msf)))
+					return (-EFAULT);
+
+				sjcd_playing.start.min =
+				    bin2bcd(sjcd_msf.cdmsf_min0);
+				sjcd_playing.start.sec =
+				    bin2bcd(sjcd_msf.cdmsf_sec0);
+				sjcd_playing.start.frame =
+				    bin2bcd(sjcd_msf.cdmsf_frame0);
+				sjcd_playing.end.min =
+				    bin2bcd(sjcd_msf.cdmsf_min1);
+				sjcd_playing.end.sec =
+				    bin2bcd(sjcd_msf.cdmsf_sec1);
+				sjcd_playing.end.frame =
+				    bin2bcd(sjcd_msf.cdmsf_frame1);
+
+				if (sjcd_play(&sjcd_playing) < 0) {
+					sjcd_audio_status =
+					    CDROM_AUDIO_ERROR;
+					return (-EIO);
+				} else
+					sjcd_audio_status =
+					    CDROM_AUDIO_PLAY;
+			}
+			return (s);
+		}
+
+	case CDROMREADTOCHDR:{
+			struct cdrom_tochdr toc_header;
+#if defined (SJCD_TRACE )
+			printk("SJCD: ioctl: readtocheader\n");
+#endif
+			toc_header.cdth_trk0 = sjcd_first_track_no;
+			toc_header.cdth_trk1 = sjcd_last_track_no;
+			if (copy_to_user(argp, &toc_header,
+					 sizeof(toc_header)))
+				return -EFAULT;
+			return 0;
+		}
+
+	case CDROMREADTOCENTRY:{
+			struct cdrom_tocentry toc_entry;
+			int s;
+#if defined( SJCD_TRACE )
+			printk("SJCD: ioctl: readtocentry\n");
+#endif
+			if ((s =
+			     access_ok(VERIFY_WRITE, argp, sizeof(toc_entry))
+			     		? 0 : -EFAULT) == 0) {
+				struct sjcd_hw_disk_info *tp;
+
+				if (copy_from_user(&toc_entry, argp,
+					       sizeof(toc_entry)))
+					return (-EFAULT);
+				if (toc_entry.cdte_track == CDROM_LEADOUT)
+					tp = &sjcd_table_of_contents[0];
+				else if (toc_entry.cdte_track <
+					 sjcd_first_track_no)
+					return (-EINVAL);
+				else if (toc_entry.cdte_track >
+					 sjcd_last_track_no)
+					return (-EINVAL);
+				else
+					tp = &sjcd_table_of_contents
+					    [toc_entry.cdte_track];
+
+				toc_entry.cdte_adr =
+				    tp->track_control & 0x0F;
+				toc_entry.cdte_ctrl =
+				    tp->track_control >> 4;
+
+				switch (toc_entry.cdte_format) {
+				case CDROM_LBA:
+					toc_entry.cdte_addr.lba =
+					    msf2hsg(&(tp->un.track_msf));
+					break;
+				case CDROM_MSF:
+					toc_entry.cdte_addr.msf.minute =
+					    bcd2bin(tp->un.track_msf.min);
+					toc_entry.cdte_addr.msf.second =
+					    bcd2bin(tp->un.track_msf.sec);
+					toc_entry.cdte_addr.msf.frame =
+					    bcd2bin(tp->un.track_msf.
+						    frame);
+					break;
+				default:
+					return (-EINVAL);
+				}
+				if (copy_to_user(argp, &toc_entry,
+						 sizeof(toc_entry)))
+					s = -EFAULT;
+			}
+			return (s);
+		}
+
+	case CDROMSUBCHNL:{
+			struct cdrom_subchnl subchnl;
+			int s;
+#if defined( SJCD_TRACE )
+			printk("SJCD: ioctl: subchnl\n");
+#endif
+			if ((s =
+			     access_ok(VERIFY_WRITE, argp, sizeof(subchnl))
+			     		? 0 : -EFAULT) == 0) {
+				struct sjcd_hw_qinfo q_info;
+
+				if (copy_from_user(&subchnl, argp,
+					       sizeof(subchnl)))
+					return (-EFAULT);
+
+				if (sjcd_get_q_info(&q_info) < 0)
+					return (-EIO);
+
+				subchnl.cdsc_audiostatus =
+				    sjcd_audio_status;
+				subchnl.cdsc_adr =
+				    q_info.track_control & 0x0F;
+				subchnl.cdsc_ctrl =
+				    q_info.track_control >> 4;
+				subchnl.cdsc_trk =
+				    bcd2bin(q_info.track_no);
+				subchnl.cdsc_ind = bcd2bin(q_info.x);
+
+				switch (subchnl.cdsc_format) {
+				case CDROM_LBA:
+					subchnl.cdsc_absaddr.lba =
+					    msf2hsg(&(q_info.abs));
+					subchnl.cdsc_reladdr.lba =
+					    msf2hsg(&(q_info.rel));
+					break;
+				case CDROM_MSF:
+					subchnl.cdsc_absaddr.msf.minute =
+					    bcd2bin(q_info.abs.min);
+					subchnl.cdsc_absaddr.msf.second =
+					    bcd2bin(q_info.abs.sec);
+					subchnl.cdsc_absaddr.msf.frame =
+					    bcd2bin(q_info.abs.frame);
+					subchnl.cdsc_reladdr.msf.minute =
+					    bcd2bin(q_info.rel.min);
+					subchnl.cdsc_reladdr.msf.second =
+					    bcd2bin(q_info.rel.sec);
+					subchnl.cdsc_reladdr.msf.frame =
+					    bcd2bin(q_info.rel.frame);
+					break;
+				default:
+					return (-EINVAL);
+				}
+				if (copy_to_user(argp, &subchnl,
+					         sizeof(subchnl)))
+					s = -EFAULT;
+			}
+			return (s);
+		}
+
+	case CDROMVOLCTRL:{
+			struct cdrom_volctrl vol_ctrl;
+			int s;
+#if defined( SJCD_TRACE )
+			printk("SJCD: ioctl: volctrl\n");
+#endif
+			if ((s =
+			     access_ok(VERIFY_READ, argp, sizeof(vol_ctrl))
+			     		? 0 : -EFAULT) == 0) {
+				unsigned char dummy[4];
+
+				if (copy_from_user(&vol_ctrl, argp,
+					       sizeof(vol_ctrl)))
+					return (-EFAULT);
+				sjcd_send_4_cmd(SCMD_SET_VOLUME,
+						vol_ctrl.channel0, 0xFF,
+						vol_ctrl.channel1, 0xFF);
+				if (sjcd_receive_status() < 0)
+					return (-EIO);
+				(void) sjcd_load_response(dummy, 4);
+			}
+			return (s);
+		}
+
+	case CDROMEJECT:{
+#if defined( SJCD_TRACE )
+			printk("SJCD: ioctl: eject\n");
+#endif
+			if (!sjcd_command_is_in_progress) {
+				sjcd_tray_unlock();
+				sjcd_send_cmd(SCMD_EJECT_TRAY);
+				(void) sjcd_receive_status();
+			}
+			return (0);
+		}
+
+#if defined( SJCD_GATHER_STAT )
+	case 0xABCD:{
+#if defined( SJCD_TRACE )
+			printk("SJCD: ioctl: statistic\n");
+#endif
+			if (copy_to_user(argp, &statistic, sizeof(statistic)))
+				return -EFAULT;
+			return 0;
+		}
+#endif
+
+	default:
+		return (-EINVAL);
+	}
+}
+
+/*
+ * Invalidate internal buffers of the driver.
+ */
+static void sjcd_invalidate_buffers(void)
+{
+	int i;
+	for (i = 0; i < SJCD_BUF_SIZ; sjcd_buf_bn[i++] = -1);
+	sjcd_buf_out = -1;
+}
+
+/*
+ * Take care of the different block sizes between cdrom and Linux.
+ * When Linux gets variable block sizes this will probably go away.
+ */
+
+static int current_valid(void)
+{
+        return CURRENT &&
+		CURRENT->cmd == READ &&
+		CURRENT->sector != -1;
+}
+
+static void sjcd_transfer(void)
+{
+#if defined( SJCD_TRACE )
+	printk("SJCD: transfer:\n");
+#endif
+	if (current_valid()) {
+		while (CURRENT->nr_sectors) {
+			int i, bn = CURRENT->sector / 4;
+			for (i = 0;
+			     i < SJCD_BUF_SIZ && sjcd_buf_bn[i] != bn;
+			     i++);
+			if (i < SJCD_BUF_SIZ) {
+				int offs =
+				    (i * 4 + (CURRENT->sector & 3)) * 512;
+				int nr_sectors = 4 - (CURRENT->sector & 3);
+				if (sjcd_buf_out != i) {
+					sjcd_buf_out = i;
+					if (sjcd_buf_bn[i] != bn) {
+						sjcd_buf_out = -1;
+						continue;
+					}
+				}
+				if (nr_sectors > CURRENT->nr_sectors)
+					nr_sectors = CURRENT->nr_sectors;
+#if defined( SJCD_TRACE )
+				printk("SJCD: copy out\n");
+#endif
+				memcpy(CURRENT->buffer, sjcd_buf + offs,
+				       nr_sectors * 512);
+				CURRENT->nr_sectors -= nr_sectors;
+				CURRENT->sector += nr_sectors;
+				CURRENT->buffer += nr_sectors * 512;
+			} else {
+				sjcd_buf_out = -1;
+				break;
+			}
+		}
+	}
+#if defined( SJCD_TRACE )
+	printk("SJCD: transfer: done\n");
+#endif
+}
+
+static void sjcd_poll(void)
+{
+#if defined( SJCD_GATHER_STAT )
+	/*
+	 * Update total number of ticks.
+	 */
+	statistic.ticks++;
+	statistic.tticks[sjcd_transfer_state]++;
+#endif
+
+      ReSwitch:switch (sjcd_transfer_state) {
+
+	case SJCD_S_IDLE:{
+#if defined( SJCD_GATHER_STAT )
+			statistic.idle_ticks++;
+#endif
+#if defined( SJCD_TRACE )
+			printk("SJCD_S_IDLE\n");
+#endif
+			return;
+		}
+
+	case SJCD_S_START:{
+#if defined( SJCD_GATHER_STAT )
+			statistic.start_ticks++;
+#endif
+			sjcd_send_cmd(SCMD_GET_STATUS);
+			sjcd_transfer_state =
+			    sjcd_mode ==
+			    SCMD_MODE_COOKED ? SJCD_S_READ : SJCD_S_MODE;
+			sjcd_transfer_timeout = 500;
+#if defined( SJCD_TRACE )
+			printk("SJCD_S_START: goto SJCD_S_%s mode\n",
+			       sjcd_transfer_state ==
+			       SJCD_S_READ ? "READ" : "MODE");
+#endif
+			break;
+		}
+
+	case SJCD_S_MODE:{
+			if (sjcd_check_status()) {
+				/*
+				 * Previous command is completed.
+				 */
+				if (!sjcd_status_valid
+				    || sjcd_command_failed) {
+#if defined( SJCD_TRACE )
+					printk
+					    ("SJCD_S_MODE: pre-cmd failed: goto to SJCD_S_STOP mode\n");
+#endif
+					sjcd_transfer_state = SJCD_S_STOP;
+					goto ReSwitch;
+				}
+
+				sjcd_mode = 0;	/* unknown mode; should not be valid when failed */
+				sjcd_send_1_cmd(SCMD_SET_MODE,
+						SCMD_MODE_COOKED);
+				sjcd_transfer_state = SJCD_S_READ;
+				sjcd_transfer_timeout = 1000;
+#if defined( SJCD_TRACE )
+				printk
+				    ("SJCD_S_MODE: goto SJCD_S_READ mode\n");
+#endif
+			}
+#if defined( SJCD_GATHER_STAT )
+			else
+				statistic.mode_ticks++;
+#endif
+			break;
+		}
+
+	case SJCD_S_READ:{
+			if (sjcd_status_valid ? 1 : sjcd_check_status()) {
+				/*
+				 * Previous command is completed.
+				 */
+				if (!sjcd_status_valid
+				    || sjcd_command_failed) {
+#if defined( SJCD_TRACE )
+					printk
+					    ("SJCD_S_READ: pre-cmd failed: goto to SJCD_S_STOP mode\n");
+#endif
+					sjcd_transfer_state = SJCD_S_STOP;
+					goto ReSwitch;
+				}
+				if (!sjcd_media_is_available) {
+#if defined( SJCD_TRACE )
+					printk
+					    ("SJCD_S_READ: no disk: goto to SJCD_S_STOP mode\n");
+#endif
+					sjcd_transfer_state = SJCD_S_STOP;
+					goto ReSwitch;
+				}
+				if (sjcd_mode != SCMD_MODE_COOKED) {
+					/*
+					 * We seem to come from set mode. So discard one byte of result.
+					 */
+					if (sjcd_load_response
+					    (&sjcd_mode, 1) != 0) {
+#if defined( SJCD_TRACE )
+						printk
+						    ("SJCD_S_READ: load failed: goto to SJCD_S_STOP mode\n");
+#endif
+						sjcd_transfer_state =
+						    SJCD_S_STOP;
+						goto ReSwitch;
+					}
+					if (sjcd_mode != SCMD_MODE_COOKED) {
+#if defined( SJCD_TRACE )
+						printk
+						    ("SJCD_S_READ: mode failed: goto to SJCD_S_STOP mode\n");
+#endif
+						sjcd_transfer_state =
+						    SJCD_S_STOP;
+						goto ReSwitch;
+					}
+				}
+
+				if (current_valid()) {
+					struct sjcd_play_msf msf;
+
+					sjcd_next_bn = CURRENT->sector / 4;
+					hsg2msf(sjcd_next_bn, &msf.start);
+					msf.end.min = 0;
+					msf.end.sec = 0;
+					msf.end.frame = sjcd_read_count =
+					    SJCD_BUF_SIZ;
+#if defined( SJCD_TRACE )
+					printk
+					    ("SJCD: ---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
+					    ("sjcd_next_bn:%x buf_in:%x buf_out:%x buf_bn:%x\n",
+					     sjcd_next_bn, sjcd_buf_in,
+					     sjcd_buf_out,
+					     sjcd_buf_bn[sjcd_buf_in]);
+#endif
+					sjcd_send_6_cmd(SCMD_DATA_READ,
+							&msf);
+					sjcd_transfer_state = SJCD_S_DATA;
+					sjcd_transfer_timeout = 500;
+#if defined( SJCD_TRACE )
+					printk
+					    ("SJCD_S_READ: go to SJCD_S_DATA mode\n");
+#endif
+				} else {
+#if defined( SJCD_TRACE )
+					printk
+					    ("SJCD_S_READ: nothing to read: go to SJCD_S_STOP mode\n");
+#endif
+					sjcd_transfer_state = SJCD_S_STOP;
+					goto ReSwitch;
+				}
+			}
+#if defined( SJCD_GATHER_STAT )
+			else
+				statistic.read_ticks++;
+#endif
+			break;
+		}
+
+	case SJCD_S_DATA:{
+			unsigned char stat;
+
+		      sjcd_s_data:stat =
+			    inb(SJCDPORT
+				(1));
+#if defined( SJCD_TRACE )
+			printk("SJCD_S_DATA: status = 0x%02x\n", stat);
+#endif
+			if (SJCD_STATUS_AVAILABLE(stat)) {
+				/*
+				 * No data is waiting for us in the drive buffer. Status of operation
+				 * completion is available. Read and parse it.
+				 */
+				sjcd_load_status();
+
+				if (!sjcd_status_valid
+				    || sjcd_command_failed) {
+#if defined( SJCD_TRACE )
+					printk
+					    ("SJCD: read block %d failed, maybe audio disk? Giving up\n",
+					     sjcd_next_bn);
+#endif
+					if (current_valid())
+						end_request(CURRENT, 0);
+#if defined( SJCD_TRACE )
+					printk
+					    ("SJCD_S_DATA: pre-cmd failed: go to SJCD_S_STOP mode\n");
+#endif
+					sjcd_transfer_state = SJCD_S_STOP;
+					goto ReSwitch;
+				}
+
+				if (!sjcd_media_is_available) {
+					printk
+					    ("SJCD_S_DATA: no disk: go to SJCD_S_STOP mode\n");
+					sjcd_transfer_state = SJCD_S_STOP;
+					goto ReSwitch;
+				}
+
+				sjcd_transfer_state = SJCD_S_READ;
+				goto ReSwitch;
+			} else if (SJCD_DATA_AVAILABLE(stat)) {
+				/*
+				 * One frame is read into device buffer. We must copy it to our memory.
+				 * Otherwise cdrom hangs up. Check to see if we have something to copy
+				 * to.
+				 */
+				if (!current_valid()
+				    && sjcd_buf_in == sjcd_buf_out) {
+#if defined( SJCD_TRACE )
+					printk
+					    ("SJCD_S_DATA: nothing to read: go to SJCD_S_STOP mode\n");
+					printk
+					    (" ... all the date would be discarded\n");
+#endif
+					sjcd_transfer_state = SJCD_S_STOP;
+					goto ReSwitch;
+				}
+
+				/*
+				 * Everything seems to be OK. Just read the frame and recalculate
+				 * indices.
+				 */
+				sjcd_buf_bn[sjcd_buf_in] = -1;	/* ??? */
+				insb(SJCDPORT(2),
+				     sjcd_buf + 2048 * sjcd_buf_in, 2048);
+#if defined( SJCD_TRACE )
+				printk
+				    ("SJCD_S_DATA: next_bn=%d, buf_in=%d, buf_out=%d, buf_bn=%d\n",
+				     sjcd_next_bn, sjcd_buf_in,
+				     sjcd_buf_out,
+				     sjcd_buf_bn[sjcd_buf_in]);
+#endif
+				sjcd_buf_bn[sjcd_buf_in] = sjcd_next_bn++;
+				if (sjcd_buf_out == -1)
+					sjcd_buf_out = sjcd_buf_in;
+				if (++sjcd_buf_in == SJCD_BUF_SIZ)
+					sjcd_buf_in = 0;
+
+				/*
+				 * Only one frame is ready at time. So we should turn over to wait for
+				 * another frame. If we need that, of course.
+				 */
+				if (--sjcd_read_count == 0) {
+					/*
+					 * OK, request seems to be precessed. Continue transferring...
+					 */
+					if (!sjcd_transfer_is_active) {
+						while (current_valid()) {
+							/*
+							 * Continue transferring.
+							 */
+							sjcd_transfer();
+							if (CURRENT->
+							    nr_sectors ==
+							    0)
+								end_request
+								    (CURRENT, 1);
+							else
+								break;
+						}
+					}
+					if (current_valid() &&
+					    (CURRENT->sector / 4 <
+					     sjcd_next_bn
+					     || CURRENT->sector / 4 >
+					     sjcd_next_bn +
+					     SJCD_BUF_SIZ)) {
+#if defined( SJCD_TRACE )
+						printk
+						    ("SJCD_S_DATA: can't read: go to SJCD_S_STOP mode\n");
+#endif
+						sjcd_transfer_state =
+						    SJCD_S_STOP;
+						goto ReSwitch;
+					}
+				}
+				/*
+				 * Now we should turn around rather than wait for while.
+				 */
+				goto sjcd_s_data;
+			}
+#if defined( SJCD_GATHER_STAT )
+			else
+				statistic.data_ticks++;
+#endif
+			break;
+		}
+
+	case SJCD_S_STOP:{
+			sjcd_read_count = 0;
+			sjcd_send_cmd(SCMD_STOP);
+			sjcd_transfer_state = SJCD_S_STOPPING;
+			sjcd_transfer_timeout = 500;
+#if defined( SJCD_GATHER_STAT )
+			statistic.stop_ticks++;
+#endif
+			break;
+		}
+
+	case SJCD_S_STOPPING:{
+			unsigned char stat;
+
+			stat = inb(SJCDPORT(1));
+#if defined( SJCD_TRACE )
+			printk("SJCD_S_STOP: status = 0x%02x\n", stat);
+#endif
+			if (SJCD_DATA_AVAILABLE(stat)) {
+				int i;
+#if defined( SJCD_TRACE )
+				printk("SJCD_S_STOP: discard data\n");
+#endif
+				/*
+				 * Discard all the data from the pipe. Foolish method.
+				 */
+				for (i = 2048; i--;
+				     (void) inb(SJCDPORT(2)));
+				sjcd_transfer_timeout = 500;
+			} else if (SJCD_STATUS_AVAILABLE(stat)) {
+				sjcd_load_status();
+				if (sjcd_status_valid
+				    && sjcd_media_is_changed) {
+					sjcd_toc_uptodate = 0;
+					sjcd_invalidate_buffers();
+				}
+				if (current_valid()) {
+					if (sjcd_status_valid)
+						sjcd_transfer_state =
+						    SJCD_S_READ;
+					else
+						sjcd_transfer_state =
+						    SJCD_S_START;
+				} else
+					sjcd_transfer_state = SJCD_S_IDLE;
+				goto ReSwitch;
+			}
+#if defined( SJCD_GATHER_STAT )
+			else
+				statistic.stopping_ticks++;
+#endif
+			break;
+		}
+
+	default:
+		printk("SJCD: poll: invalid state %d\n",
+		       sjcd_transfer_state);
+		return;
+	}
+
+	if (--sjcd_transfer_timeout == 0) {
+		printk("SJCD: timeout in state %d\n", sjcd_transfer_state);
+		while (current_valid())
+			end_request(CURRENT, 0);
+		sjcd_send_cmd(SCMD_STOP);
+		sjcd_transfer_state = SJCD_S_IDLE;
+		goto ReSwitch;
+	}
+
+	/*
+	 * Get back in some time. 1 should be replaced with count variable to
+	 * avoid unnecessary testings.
+	 */
+	SJCD_SET_TIMER(sjcd_poll, 1);
+}
+
+static void do_sjcd_request(request_queue_t * q)
+{
+#if defined( SJCD_TRACE )
+	printk("SJCD: do_sjcd_request(%ld+%ld)\n",
+	       CURRENT->sector, CURRENT->nr_sectors);
+#endif
+	sjcd_transfer_is_active = 1;
+	while (current_valid()) {
+		sjcd_transfer();
+		if (CURRENT->nr_sectors == 0)
+			end_request(CURRENT, 1);
+		else {
+			sjcd_buf_out = -1;	/* Want to read a block not in buffer */
+			if (sjcd_transfer_state == SJCD_S_IDLE) {
+				if (!sjcd_toc_uptodate) {
+					if (sjcd_update_toc() < 0) {
+						printk
+						    ("SJCD: transfer: discard\n");
+						while (current_valid())
+							end_request(CURRENT, 0);
+						break;
+					}
+				}
+				sjcd_transfer_state = SJCD_S_START;
+				SJCD_SET_TIMER(sjcd_poll, HZ / 100);
+			}
+			break;
+		}
+	}
+	sjcd_transfer_is_active = 0;
+#if defined( SJCD_TRACE )
+	printk
+	    ("sjcd_next_bn:%x sjcd_buf_in:%x sjcd_buf_out:%x sjcd_buf_bn:%x\n",
+	     sjcd_next_bn, sjcd_buf_in, sjcd_buf_out,
+	     sjcd_buf_bn[sjcd_buf_in]);
+	printk("do_sjcd_request ends\n");
+#endif
+}
+
+/*
+ * Open the device special file. Check disk is in.
+ */
+static int sjcd_open(struct inode *ip, struct file *fp)
+{
+	/*
+	 * Check the presence of device.
+	 */
+	if (!sjcd_present)
+		return (-ENXIO);
+
+	/*
+	 * Only read operations are allowed. Really? (:-)
+	 */
+	if (fp->f_mode & 2)
+		return (-EROFS);
+
+	if (sjcd_open_count == 0) {
+		int s, sjcd_open_tries;
+/* We don't know that, do we? */
+/*
+    sjcd_audio_status = CDROM_AUDIO_NO_STATUS;
+*/
+		sjcd_mode = 0;
+		sjcd_door_was_open = 0;
+		sjcd_transfer_state = SJCD_S_IDLE;
+		sjcd_invalidate_buffers();
+		sjcd_status_valid = 0;
+
+		/*
+		 * Strict status checking.
+		 */
+		for (sjcd_open_tries = 4; --sjcd_open_tries;) {
+			if (!sjcd_status_valid)
+				sjcd_get_status();
+			if (!sjcd_status_valid) {
+#if defined( SJCD_DIAGNOSTIC )
+				printk
+				    ("SJCD: open: timed out when check status.\n");
+#endif
+				goto err_out;
+			} else if (!sjcd_media_is_available) {
+#if defined( SJCD_DIAGNOSTIC )
+				printk("SJCD: open: no disk in drive\n");
+#endif
+				if (!sjcd_door_closed) {
+					sjcd_door_was_open = 1;
+#if defined( SJCD_TRACE )
+					printk
+					    ("SJCD: open: close the tray\n");
+#endif
+					s = sjcd_tray_close();
+					if (s < 0 || !sjcd_status_valid
+					    || sjcd_command_failed) {
+#if defined( SJCD_DIAGNOSTIC )
+						printk
+						    ("SJCD: open: tray close attempt failed\n");
+#endif
+						goto err_out;
+					}
+					continue;
+				} else
+					goto err_out;
+			}
+			break;
+		}
+		s = sjcd_tray_lock();
+		if (s < 0 || !sjcd_status_valid || sjcd_command_failed) {
+#if defined( SJCD_DIAGNOSTIC )
+			printk("SJCD: open: tray lock attempt failed\n");
+#endif
+			goto err_out;
+		}
+#if defined( SJCD_TRACE )
+		printk("SJCD: open: done\n");
+#endif
+	}
+
+	++sjcd_open_count;
+	return (0);
+
+      err_out:
+	return (-EIO);
+}
+
+/*
+ * On close, we flush all sjcd blocks from the buffer cache.
+ */
+static int sjcd_release(struct inode *inode, struct file *file)
+{
+	int s;
+
+#if defined( SJCD_TRACE )
+	printk("SJCD: release\n");
+#endif
+	if (--sjcd_open_count == 0) {
+		sjcd_invalidate_buffers();
+		s = sjcd_tray_unlock();
+		if (s < 0 || !sjcd_status_valid || sjcd_command_failed) {
+#if defined( SJCD_DIAGNOSTIC )
+			printk
+			    ("SJCD: release: tray unlock attempt failed.\n");
+#endif
+		}
+		if (sjcd_door_was_open) {
+			s = sjcd_tray_open();
+			if (s < 0 || !sjcd_status_valid
+			    || sjcd_command_failed) {
+#if defined( SJCD_DIAGNOSTIC )
+				printk
+				    ("SJCD: release: tray unload attempt failed.\n");
+#endif
+			}
+		}
+	}
+	return 0;
+}
+
+/*
+ * A list of file operations allowed for this cdrom.
+ */
+static struct block_device_operations sjcd_fops = {
+	.owner		= THIS_MODULE,
+	.open		= sjcd_open,
+	.release	= sjcd_release,
+	.ioctl		= sjcd_ioctl,
+	.media_changed	= sjcd_disk_change,
+};
+
+/*
+ * Following stuff is intended for initialization of the cdrom. It
+ * first looks for presence of device. If the device is present, it
+ * will be reset. Then read the version of the drive and load status.
+ * The version is two BCD-coded bytes.
+ */
+static struct {
+	unsigned char major, minor;
+} sjcd_version;
+
+static struct gendisk *sjcd_disk;
+
+/*
+ * Test for presence of drive and initialize it. Called at boot time.
+ * Probe cdrom, find out version and status.
+ */
+static int __init sjcd_init(void)
+{
+	int i;
+
+	printk(KERN_INFO
+	       "SJCD: Sanyo CDR-H94A cdrom driver version %d.%d.\n",
+	       SJCD_VERSION_MAJOR, SJCD_VERSION_MINOR);
+
+#if defined( SJCD_TRACE )
+	printk("SJCD: sjcd=0x%x: ", sjcd_base);
+#endif
+
+	if (register_blkdev(MAJOR_NR, "sjcd"))
+		return -EIO;
+
+	sjcd_queue = blk_init_queue(do_sjcd_request, &sjcd_lock);
+	if (!sjcd_queue)
+		goto out0;
+
+	blk_queue_hardsect_size(sjcd_queue, 2048);
+
+	sjcd_disk = alloc_disk(1);
+	if (!sjcd_disk) {
+		printk(KERN_ERR "SJCD: can't allocate disk");
+		goto out1;
+	}
+	sjcd_disk->major = MAJOR_NR,
+	sjcd_disk->first_minor = 0,
+	sjcd_disk->fops = &sjcd_fops,
+	sprintf(sjcd_disk->disk_name, "sjcd");
+	sprintf(sjcd_disk->devfs_name, "sjcd");
+
+	if (!request_region(sjcd_base, 4,"sjcd")) {
+		printk
+		    ("SJCD: Init failed, I/O port (%X) is already in use\n",
+		     sjcd_base);
+		goto out2;
+	}
+
+	/*
+	 * Check for card. Since we are booting now, we can't use standard
+	 * wait algorithm.
+	 */
+	printk(KERN_INFO "SJCD: Resetting: ");
+	sjcd_send_cmd(SCMD_RESET);
+	for (i = 1000; i > 0 && !sjcd_status_valid; --i) {
+		unsigned long timer;
+
+		/*
+		 * Wait 10ms approx.
+		 */
+		for (timer = jiffies; time_before_eq(jiffies, timer););
+		if ((i % 100) == 0)
+			printk(".");
+		(void) sjcd_check_status();
+	}
+	if (i == 0 || sjcd_command_failed) {
+		printk(" reset failed, no drive found.\n");
+		goto out3;
+	} else
+		printk("\n");
+
+	/*
+	 * Get and print out cdrom version.
+	 */
+	printk(KERN_INFO "SJCD: Getting version: ");
+	sjcd_send_cmd(SCMD_GET_VERSION);
+	for (i = 1000; i > 0 && !sjcd_status_valid; --i) {
+		unsigned long timer;
+
+		/*
+		 * Wait 10ms approx.
+		 */
+		for (timer = jiffies; time_before_eq(jiffies, timer););
+		if ((i % 100) == 0)
+			printk(".");
+		(void) sjcd_check_status();
+	}
+	if (i == 0 || sjcd_command_failed) {
+		printk(" get version failed, no drive found.\n");
+		goto out3;
+	}
+
+	if (sjcd_load_response(&sjcd_version, sizeof(sjcd_version)) == 0) {
+		printk(" %1x.%02x\n", (int) sjcd_version.major,
+		       (int) sjcd_version.minor);
+	} else {
+		printk(" read version failed, no drive found.\n");
+		goto out3;
+	}
+
+	/*
+	 * Check and print out the tray state. (if it is needed?).
+	 */
+	if (!sjcd_status_valid) {
+		printk(KERN_INFO "SJCD: Getting status: ");
+		sjcd_send_cmd(SCMD_GET_STATUS);
+		for (i = 1000; i > 0 && !sjcd_status_valid; --i) {
+			unsigned long timer;
+
+			/*
+			 * Wait 10ms approx.
+			 */
+			for (timer = jiffies;
+			     time_before_eq(jiffies, timer););
+			if ((i % 100) == 0)
+				printk(".");
+			(void) sjcd_check_status();
+		}
+		if (i == 0 || sjcd_command_failed) {
+			printk(" get status failed, no drive found.\n");
+			goto out3;
+		} else
+			printk("\n");
+	}
+
+	printk(KERN_INFO "SJCD: Status: port=0x%x.\n", sjcd_base);
+	sjcd_disk->queue = sjcd_queue;
+	add_disk(sjcd_disk);
+
+	sjcd_present++;
+	return (0);
+out3:
+	release_region(sjcd_base, 4);
+out2:
+	put_disk(sjcd_disk);
+out1:
+	blk_cleanup_queue(sjcd_queue);
+out0:
+	if ((unregister_blkdev(MAJOR_NR, "sjcd") == -EINVAL))
+		printk("SJCD: cannot unregister device.\n");
+	return (-EIO);
+}
+
+static void __exit sjcd_exit(void)
+{
+	del_gendisk(sjcd_disk);
+	put_disk(sjcd_disk);
+	release_region(sjcd_base, 4);
+	blk_cleanup_queue(sjcd_queue);
+	if ((unregister_blkdev(MAJOR_NR, "sjcd") == -EINVAL))
+		printk("SJCD: cannot unregister device.\n");
+	printk(KERN_INFO "SJCD: module: removed.\n");
+}
+
+module_init(sjcd_init);
+module_exit(sjcd_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_BLOCKDEV_MAJOR(SANYO_CDROM_MAJOR);