2006-10-08 Thomas Schwinge <tschwinge@gnu.org>

* linux/dev/drivers/scsi/sr.c: Move file...
	* linux/src/drivers/scsi/sr.c: ... here.

1 files changed, 0 insertions, 1290 deletions

diff --git a/linux/dev/drivers/scsi/sr.c b/linux/dev/drivers/scsi/sr.c
deleted file mode 100644
index 8f44246..0000000
--- a/linux/dev/drivers/scsi/sr.c
+++ /dev/null
@@ -1,1290 +0,0 @@
-/*
- *  sr.c Copyright (C) 1992 David Giller
- *	     Copyright (C) 1993, 1994, 1995 Eric Youngdale
- *
- *  adapted from:
- *	sd.c Copyright (C) 1992 Drew Eckhardt 
- *	Linux scsi disk driver by
- *		Drew Eckhardt <drew@colorado.edu>
- *
- *      Modified by Eric Youngdale ericy@cais.com to
- *      add scatter-gather, multiple outstanding request, and other
- *      enhancements.
- *
- *	    Modified by Eric Youngdale eric@aib.com to support loadable
- *	    low-level scsi drivers.
- *
- *	 Modified by Thomas Quinot thomas@melchior.cuivre.fdn.fr to
- *	 provide auto-eject.
- *
- */
-
-#include <linux/module.h>
-
-#include <linux/fs.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/cdrom.h>
-#include <linux/interrupt.h>
-#include <asm/system.h>
-
-#define MAJOR_NR SCSI_CDROM_MAJOR
-#include <linux/blk.h>
-#include "scsi.h"
-#include "hosts.h"
-#include "sr.h"
-#include <scsi/scsi_ioctl.h>   /* For the door lock/unlock commands */
-#include "constants.h"
-
-#define MAX_RETRIES 3
-#define SR_TIMEOUT (30 * HZ)
-
-static int sr_init(void);
-static void sr_finish(void);
-static int sr_attach(Scsi_Device *);
-static int sr_detect(Scsi_Device *);
-static void sr_detach(Scsi_Device *);
-
-struct Scsi_Device_Template sr_template = {NULL, "cdrom", "sr", NULL, TYPE_ROM, 
-					       SCSI_CDROM_MAJOR, 0, 0, 0, 1,
-					       sr_detect, sr_init,
-					       sr_finish, sr_attach, sr_detach};
-
-Scsi_CD * scsi_CDs = NULL;
-static int * sr_sizes;
-
-static int * sr_blocksizes;
-
-static int sr_open(struct inode *, struct file *);
-void get_sectorsize(int);
-void sr_photocd(struct inode *);
-
-extern int sr_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
-
-void requeue_sr_request (Scsi_Cmnd * SCpnt);
-static int check_cdrom_media_change(kdev_t);
-
-static void sr_release(struct inode * inode, struct file * file)
-{
-	sync_dev(inode->i_rdev);
-	if(! --scsi_CDs[MINOR(inode->i_rdev)].device->access_count)
-	{
-	    sr_ioctl(inode, NULL, SCSI_IOCTL_DOORUNLOCK, 0);
-	    if (scsi_CDs[MINOR(inode->i_rdev)].auto_eject)
-		sr_ioctl(inode, NULL, CDROMEJECT, 0);
-	}
-	if (scsi_CDs[MINOR(inode->i_rdev)].device->host->hostt->usage_count)
-	    (*scsi_CDs[MINOR(inode->i_rdev)].device->host->hostt->usage_count)--;
-	if(sr_template.usage_count) (*sr_template.usage_count)--;
-}
-
-static struct file_operations sr_fops = 
-{
-	NULL,			/* lseek - default */
-	block_read,		/* read - general block-dev read */
-	block_write,		/* write - general block-dev write */
-	NULL,			/* readdir - bad */
-	NULL,			/* select */
-	sr_ioctl,		/* ioctl */
-	NULL,			/* mmap */
-	sr_open,       	/* special open code */
-	sr_release,		/* release */
-	NULL,			/* fsync */
-	NULL,			/* fasync */
-	check_cdrom_media_change,  /* Disk change */
-	NULL			/* revalidate */
-};
-
-/*
- * This function checks to see if the media has been changed in the
- * CDROM drive.  It is possible that we have already sensed a change,
- * or the drive may have sensed one and not yet reported it.  We must
- * be ready for either case. This function always reports the current
- * value of the changed bit.  If flag is 0, then the changed bit is reset.
- * This function could be done as an ioctl, but we would need to have
- * an inode for that to work, and we do not always have one.
- */
-
-int check_cdrom_media_change(kdev_t full_dev){
-	int retval, target;
-	struct inode inode;
-	int flag = 0;
-    
-	target =  MINOR(full_dev);
-    
-	if (target >= sr_template.nr_dev) {
-		printk("CD-ROM request error: invalid device.\n");
-		return 0;
-	};
-    
-	inode.i_rdev = full_dev;  /* This is all we really need here */
-	retval = sr_ioctl(&inode, NULL, SCSI_IOCTL_TEST_UNIT_READY, 0);
-    
-	if(retval){ /* Unable to test, unit probably not ready.  This usually
-		 * means there is no disc in the drive.  Mark as changed,
-		 * and we will figure it out later once the drive is
-		 * available again.  */
-	
-	scsi_CDs[target].device->changed = 1;
-	return 1; /* This will force a flush, if called from
-		   * check_disk_change */
-	};
-    
-	retval = scsi_CDs[target].device->changed;
-	if(!flag) {
-	scsi_CDs[target].device->changed = 0;
-	/* If the disk changed, the capacity will now be different,
-	 * so we force a re-read of this information */
-	if (retval) scsi_CDs[target].needs_sector_size = 1;
-	};
-	return retval;
-}
-
-/*
- * rw_intr is the interrupt routine for the device driver.  It will be notified on the 
- * end of a SCSI read / write, and will take on of several actions based on success or failure.
- */
-
-static void rw_intr (Scsi_Cmnd * SCpnt)
-{
-	int result = SCpnt->result;
-	int this_count = SCpnt->this_count;
-	int good_sectors = (result == 0 ? this_count : 0);
-	int block_sectors = 0;
-    
-#ifdef DEBUG
-	printk("sr.c done: %x %x\n",result, SCpnt->request.bh->b_data);
-#endif
-    /*
-      Handle MEDIUM ERRORs or VOLUME OVERFLOWs that indicate partial success.
-      Since this is a relatively rare error condition, no care is taken to
-      avoid unnecessary additional work such as memcpy's that could be avoided.
-    */
-
-	if (driver_byte(result) != 0 &&		    /* An error occurred */
-	    SCpnt->sense_buffer[0] == 0xF0 &&	    /* Sense data is valid */
-	    (SCpnt->sense_buffer[2] == MEDIUM_ERROR ||
-	     SCpnt->sense_buffer[2] == VOLUME_OVERFLOW ||
-	     SCpnt->sense_buffer[2] == ILLEGAL_REQUEST))
-	  {
-	    long error_sector = (SCpnt->sense_buffer[3] << 24) |
-				(SCpnt->sense_buffer[4] << 16) |
-				(SCpnt->sense_buffer[5] << 8) |
-				SCpnt->sense_buffer[6];
-	    int device_nr = DEVICE_NR(SCpnt->request.rq_dev);
-	    if (SCpnt->request.bh != NULL)
-	      block_sectors = SCpnt->request.bh->b_size >> 9;
-	    if (block_sectors < 4) block_sectors = 4;
-	    if (scsi_CDs[device_nr].sector_size == 2048)
-	      error_sector <<= 2;
-	    error_sector &= ~ (block_sectors - 1);
-	    good_sectors = error_sector - SCpnt->request.sector;
-	    if (good_sectors < 0 || good_sectors >= this_count)
-	      good_sectors = 0;
-	    /*
-	      The SCSI specification allows for the value returned by READ
-	      CAPACITY to be up to 75 2K sectors past the last readable
-	      block.  Therefore, if we hit a medium error within the last
-	      75 2K sectors, we decrease the saved size value.
-	    */
-	    if ((error_sector >> 1) < sr_sizes[device_nr] &&
-		scsi_CDs[device_nr].capacity - error_sector < 4*75)
-	      sr_sizes[device_nr] = error_sector >> 1;
-	  }
-
-	if (good_sectors > 0)
-    { /* Some sectors were read successfully. */
-	if (SCpnt->use_sg == 0) {
-		    if (SCpnt->buffer != SCpnt->request.buffer)
-	    {
-		int offset;
-		offset = (SCpnt->request.sector % 4) << 9;
-		memcpy((char *)SCpnt->request.buffer, 
-		       (char *)SCpnt->buffer + offset, 
-		       good_sectors << 9);
-		/* Even though we are not using scatter-gather, we look
-		 * ahead and see if there is a linked request for the
-		 * other half of this buffer.  If there is, then satisfy
-		 * it. */
-		if((offset == 0) && good_sectors == 2 &&
-		   SCpnt->request.nr_sectors > good_sectors && 
-		   SCpnt->request.bh &&
-		   SCpnt->request.bh->b_reqnext &&
-		   SCpnt->request.bh->b_reqnext->b_size == 1024) {
-		    memcpy((char *)SCpnt->request.bh->b_reqnext->b_data, 
-			   (char *)SCpnt->buffer + 1024, 
-			   1024);
-		    good_sectors += 2;
-		};
-		
-		scsi_free(SCpnt->buffer, 2048);
-	    }
-	} else {
-		    struct scatterlist * sgpnt;
-		    int i;
-		    sgpnt = (struct scatterlist *) SCpnt->buffer;
-		    for(i=0; i<SCpnt->use_sg; i++) {
-		if (sgpnt[i].alt_address) {
-		    if (sgpnt[i].alt_address != sgpnt[i].address) {
-			memcpy(sgpnt[i].alt_address, sgpnt[i].address, sgpnt[i].length);
-		    };
-		    scsi_free(sgpnt[i].address, sgpnt[i].length);
-		};
-		    };
-		    scsi_free(SCpnt->buffer, SCpnt->sglist_len);  /* Free list of scatter-gather pointers */
-		    if(SCpnt->request.sector % 4) good_sectors -= 2;
-	    /* See   if there is a padding record at the end that needs to be removed */
-		    if(good_sectors > SCpnt->request.nr_sectors)
-		good_sectors -= 2;
-	};
-	
-#ifdef DEBUG
-		printk("(%x %x %x) ",SCpnt->request.bh, SCpnt->request.nr_sectors, 
-		       good_sectors);
-#endif
-		if (SCpnt->request.nr_sectors > this_count)
-	{	 
-			SCpnt->request.errors = 0;
-			if (!SCpnt->request.bh)
-			    panic("sr.c: linked page request (%lx %x)",
-		      SCpnt->request.sector, this_count);
-	}
-	
-	SCpnt = end_scsi_request(SCpnt, 1, good_sectors);  /* All done */
-	if (result == 0)
-	  {
-	    requeue_sr_request(SCpnt);
-	    return;
-	  }
-    }
-    
-    if (good_sectors == 0) {
-	/* We only come through here if no sectors were read successfully. */
-    
-    /* Free up any indirection buffers we allocated for DMA purposes. */
-	if (SCpnt->use_sg) {
-	struct scatterlist * sgpnt;
-	int i;
-	sgpnt = (struct scatterlist *) SCpnt->buffer;
-	for(i=0; i<SCpnt->use_sg; i++) {
-	    if (sgpnt[i].alt_address) {
-		scsi_free(sgpnt[i].address, sgpnt[i].length);
-	    }
-	}
-	scsi_free(SCpnt->buffer, SCpnt->sglist_len);  /* Free list of scatter-gather pointers */
-	} else {
-	if (SCpnt->buffer != SCpnt->request.buffer)
-	    scsi_free(SCpnt->buffer, SCpnt->bufflen);
-	}
-    
-    }
-
-	if (driver_byte(result) != 0) {
-		if ((SCpnt->sense_buffer[0] & 0x7f) == 0x70) {
-			if ((SCpnt->sense_buffer[2] & 0xf) == UNIT_ATTENTION) {
-				/* detected disc change.  set a bit and quietly refuse 
-				 * further access.	*/
-		
-				scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].device->changed = 1;
-				SCpnt = end_scsi_request(SCpnt, 0, this_count);
-				requeue_sr_request(SCpnt);
-				return;
-			}
-		}
-	    
-		if (SCpnt->sense_buffer[2] == ILLEGAL_REQUEST) {
-			printk("CD-ROM error: ");
-			print_sense("sr", SCpnt);
-			printk("command was: ");
-			print_command(SCpnt->cmnd);
-			if (scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].ten) {
-				scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].ten = 0;
-				requeue_sr_request(SCpnt);
-				result = 0;
-				return;
-			} else {
-				SCpnt = end_scsi_request(SCpnt, 0, this_count);
-				requeue_sr_request(SCpnt); /* Do next request */
-				return;
-			}
-	    
-		}
-
-		if (SCpnt->sense_buffer[2] == NOT_READY) {
-			printk("CD-ROM not ready.  Make sure you have a disc in the drive.\n");
-			SCpnt = end_scsi_request(SCpnt, 0, this_count);
-			requeue_sr_request(SCpnt); /* Do next request */
-			return;
-		}
-
-		if (SCpnt->sense_buffer[2] == MEDIUM_ERROR) {
-		    printk("scsi%d: MEDIUM ERROR on "
-			   "channel %d, id %d, lun %d, CDB: ",
-			   SCpnt->host->host_no, (int) SCpnt->channel, 
-			   (int) SCpnt->target, (int) SCpnt->lun);
-		    print_command(SCpnt->cmnd);
-		    print_sense("sr", SCpnt);
-		    SCpnt = end_scsi_request(SCpnt, 0, block_sectors);
-		    requeue_sr_request(SCpnt);
-		    return;
-		}
-
-		if (SCpnt->sense_buffer[2] == VOLUME_OVERFLOW) {
-		    printk("scsi%d: VOLUME OVERFLOW on "
-			   "channel %d, id %d, lun %d, CDB: ",
-			   SCpnt->host->host_no, (int) SCpnt->channel, 
-			   (int) SCpnt->target, (int) SCpnt->lun);
-		    print_command(SCpnt->cmnd);
-		    print_sense("sr", SCpnt);
-		    SCpnt = end_scsi_request(SCpnt, 0, block_sectors);
-		    requeue_sr_request(SCpnt);
-		    return;
-		}
-    }
-	
-	/* We only get this far if we have an error we have not recognized */
-	if(result) {
-	printk("SCSI CD error : host %d id %d lun %d return code = %03x\n", 
-	       scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].device->host->host_no, 
-	       scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].device->id,
-	       scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].device->lun,
-	       result);
-	    
-	if (status_byte(result) == CHECK_CONDITION)
-	    print_sense("sr", SCpnt);
-	
-	SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.current_nr_sectors);
-	requeue_sr_request(SCpnt);
-    }
-}
-
-/*
- * Here I tried to implement support for multisession-CD's
- * 
- * Much of this has do be done with vendor-specific SCSI-commands, because
- * multisession is newer than the SCSI-II standard.
- * So I have to complete it step by step. Useful information is welcome.
- *
- * Actually works:
- *   - NEC:     Detection and support of multisession CD's. Special handling
- *              for XA-disks is not necessary.
- *     
- *   - TOSHIBA: setting density is done here now, mounting PhotoCD's should
- *              work now without running the program "set_density"
- *              Multisession CD's are supported too.
- *
- *   Gerd Knorr <kraxel@cs.tu-berlin.de> 
- */
-/*
- * 19950704 operator@melchior.cuivre.fdn.fr (Thomas Quinot)
- *
- *   - SONY:	Same as Nec.
- *
- *   - PIONEER: works with SONY code (may be others too ?)
- */
-
-void sr_photocd(struct inode *inode)
-{
-    unsigned long   sector,min,sec,frame;
-    unsigned char   buf[40];    /* the buffer for the ioctl */
-    unsigned char   *cmd;       /* the scsi-command */
-    unsigned char   *send;      /* the data we send to the drive ... */
-    unsigned char   *rec;       /* ... and get back */
-    int             rc,is_xa,no_multi;
-    
-    if (scsi_CDs[MINOR(inode->i_rdev)].xa_flags & 0x02) {
-#ifdef DEBUG
-	printk(KERN_DEBUG "sr_photocd: CDROM and/or driver do not support multisession CD's");
-#endif
-	return;
-    }
-    
-    if (!suser()) {
-	/* I'm not the superuser, so SCSI_IOCTL_SEND_COMMAND isn't allowed
-         * for me. That's why mpcd_sector will be initialized with zero,
-         * because I'm not able to get the right value. Necessary only if
-         * access_count is 1, else no disk change happened since the last
-         * call of this function and we can keep the old value.
-	 */
-	if (1 == scsi_CDs[MINOR(inode->i_rdev)].device->access_count) {
-	    scsi_CDs[MINOR(inode->i_rdev)].mpcd_sector = 0;
-	    scsi_CDs[MINOR(inode->i_rdev)].xa_flags &= ~0x01;
-	}
-	return;
-    }
-    
-    sector   = 0;
-    is_xa    = 0;
-    no_multi = 0;
-    cmd = rec = &buf[8];
-    
-    switch(scsi_CDs[MINOR(inode->i_rdev)].device->manufacturer) {
-	
-    case SCSI_MAN_NEC:
-#ifdef DEBUG
-	printk(KERN_DEBUG "sr_photocd: use NEC code\n");
-#endif
-	memset(buf,0,40);
-	*((unsigned int*)buf)   = 0x0;   /* we send nothing...     */
-	*((unsigned int*)buf+1) = 0x16;  /* and receive 0x16 bytes */
-	cmd[0] = 0xde;
-	cmd[1] = 0x03;
-	cmd[2] = 0xb0;
-	rc = kernel_scsi_ioctl(scsi_CDs[MINOR(inode->i_rdev)].device,
-			   SCSI_IOCTL_SEND_COMMAND, buf);
-	if (rc != 0) {
-            if (rc != 0x28000002) /* drop "not ready" */
-                printk(KERN_WARNING"sr_photocd: ioctl error (NEC): 0x%x\n",rc);
-	    break;
-	}
-	if (rec[14] != 0 && rec[14] != 0xb0) {
-	    printk(KERN_INFO"sr_photocd: (NEC) Hmm, seems the CDROM doesn't support multisession CD's\n");
-	    no_multi = 1;
-	    break;
-	}
-	min   = (unsigned long) rec[15]/16*10 + (unsigned long) rec[15]%16;
-	sec   = (unsigned long) rec[16]/16*10 + (unsigned long) rec[16]%16;
-	frame = (unsigned long) rec[17]/16*10 + (unsigned long) rec[17]%16;
-	sector = min*CD_SECS*CD_FRAMES + sec*CD_FRAMES + frame;
-	is_xa  = (rec[14] == 0xb0);
-#ifdef DEBUG
-	if (sector) {
-	    printk(KERN_DEBUG "sr_photocd: multisession CD detected. start: %lu\n",sector);
-	}
-#endif
-	break;
-	
-    case SCSI_MAN_TOSHIBA:
-#ifdef DEBUG
-	printk(KERN_DEBUG "sr_photocd: use TOSHIBA code\n");
-#endif
-	
-	/* we request some disc information (is it a XA-CD ?,
-	 * where starts the last session ?) */
-	memset(buf,0,40);
-	*((unsigned int*)buf)   = (unsigned int) 0;
-	*((unsigned int*)buf+1) = (unsigned int) 4;  /* receive 4 bytes */
-	cmd[0]                  = (unsigned char) 0x00c7;
-	cmd[1]                  = (unsigned char) 3;
-	rc = kernel_scsi_ioctl(scsi_CDs[MINOR(inode->i_rdev)].device,
-			       SCSI_IOCTL_SEND_COMMAND, buf);
-	if (rc != 0) {
-	    if (rc == 0x28000002) {
-		/* Got a "not ready" - error. No chance to find out if this is
-		 * because there is no CD in the drive or because the drive
-		 * don't knows multisession CD's. So I need to do an extra
-                 * check... */
-		if (!kernel_scsi_ioctl(scsi_CDs[MINOR(inode->i_rdev)].device,
-				       SCSI_IOCTL_TEST_UNIT_READY, NULL)) {
-		    printk(KERN_INFO "sr_photocd: (TOSHIBA) Hmm, seems the CDROM doesn't support multisession CD's\n");
-		    no_multi = 1;
-		}
-	    } else
-		printk(KERN_INFO"sr_photocd: ioctl error (TOSHIBA #1): 0x%x\n",rc);
-	    break; /* if the first ioctl fails, we don't call the second one */
-	}
-	is_xa  = (rec[0] == 0x20);
-	min    = (unsigned long) rec[1]/16*10 + (unsigned long) rec[1]%16;
-	sec    = (unsigned long) rec[2]/16*10 + (unsigned long) rec[2]%16;
-	frame  = (unsigned long) rec[3]/16*10 + (unsigned long) rec[3]%16;
-	sector = min*CD_SECS*CD_FRAMES + sec*CD_FRAMES + frame;
-	if (sector) {
-	    sector -= CD_BLOCK_OFFSET;
-#ifdef DEBUG
-	    printk(KERN_DEBUG "sr_photocd: multisession CD detected: start: %lu\n",sector);
-#endif
-	}
-	
-	/* now we do a get_density... */
-	memset(buf,0,40);
-	*((unsigned int*)buf)   = (unsigned int) 0;
-	*((unsigned int*)buf+1) = (unsigned int) 12;
-	cmd[0]                  = (unsigned char) MODE_SENSE;
-	cmd[2]                  = (unsigned char) 1;
-	cmd[4]                  = (unsigned char) 12;
-	rc = kernel_scsi_ioctl(scsi_CDs[MINOR(inode->i_rdev)].device,
-			       SCSI_IOCTL_SEND_COMMAND, buf);
-	if (rc != 0) {
-	    printk(KERN_WARNING "sr_photocd: ioctl error (TOSHIBA #2): 0x%x\n",rc);
-	    break;
-	}
-#ifdef DEBUG
-	printk(KERN_DEBUG "sr_photocd: get_density: 0x%x\n",rec[4]);
-#endif
-	
-	/* ...and only if necessary a set_density */
-	if ((rec[4] != 0x81 && is_xa) || (rec[4] != 0 && !is_xa)) {
-#ifdef DEBUG
-	    printk(KERN_DEBUG "sr_photocd: doing set_density\n");
-#endif
-	    memset(buf,0,40);
-	    *((unsigned int*)buf)   = (unsigned int) 12;  /* send 12 bytes */
-	    *((unsigned int*)buf+1) = (unsigned int) 0;
-	    cmd[0]                  = (unsigned char) MODE_SELECT;
-	    cmd[1]                  = (unsigned char) (1 << 4);
-	    cmd[4]                  = (unsigned char) 12;
-            send = &cmd[6]; 		/* this is a 6-Byte command    */
-            send[ 3]                = (unsigned char) 0x08; /* data for cmd */
-            /* density 0x81 for XA, 0 else */
-            send[ 4]                = (is_xa) ? 
-                                    (unsigned char) 0x81 : (unsigned char) 0;  
-            send[10]                = (unsigned char) 0x08;
-	    rc = kernel_scsi_ioctl(scsi_CDs[MINOR(inode->i_rdev)].device,
-				   SCSI_IOCTL_SEND_COMMAND, buf);
-	    if (rc != 0) {
-		printk(KERN_WARNING "sr_photocd: ioctl error (TOSHIBA #3): 0x%x\n",rc);
-	    }
-	    /* The set_density command may have changed the
-             * sector size or capacity. */
-	    scsi_CDs[MINOR(inode->i_rdev)].needs_sector_size = 1;
-	}
-	break;
-
-    case SCSI_MAN_SONY: /* Thomas QUINOT <thomas@melchior.cuivre.fdn.fr> */
-    case SCSI_MAN_PIONEER:
-    case SCSI_MAN_UNKNOWN:
-#ifdef DEBUG
-	printk(KERN_DEBUG "sr_photocd: use SONY/PIONEER code\n");
-#endif
-	get_sectorsize(MINOR(inode->i_rdev));	/* spinup (avoid timeout) */
-	memset(buf,0,40);
-	*((unsigned int*)buf)   = 0x0;   /* we send nothing...     */
-	*((unsigned int*)buf+1) = 0x0c;  /* and receive 0x0c bytes */
-	cmd[0] = READ_TOC;
-	cmd[8] = 0x0c;
-	cmd[9] = 0x40;
-	rc = kernel_scsi_ioctl(scsi_CDs[MINOR(inode->i_rdev)].device,
-			       SCSI_IOCTL_SEND_COMMAND, buf);
-	
-	if (rc != 0) {
-            if (rc != 0x28000002) /* drop "not ready" */
-                printk(KERN_WARNING "sr_photocd: ioctl error (SONY/PIONEER): 0x%x\n",rc);
-	    break;
-	}
-	if ((rec[0] << 8) + rec[1] < 0x0a) {
-	    printk(KERN_INFO "sr_photocd: (SONY/PIONEER) Hmm, seems the CDROM doesn't support multisession CD's\n");
-	    no_multi = 1;
-	    break;
-	}
-	sector = rec[11] + (rec[10] << 8) + (rec[9] << 16) + (rec[8] << 24);
-	is_xa = !!sector;
-#ifdef DEBUG
-	if (sector)
-	    printk (KERN_DEBUG "sr_photocd: multisession CD detected. start: %lu\n",sector);
-#endif
-	break;
-		
-    case SCSI_MAN_NEC_OLDCDR:
-    default:
-	sector = 0;
-	no_multi = 1;
-	break; }
-    
-    scsi_CDs[MINOR(inode->i_rdev)].mpcd_sector = sector;
-    if (is_xa)
-	scsi_CDs[MINOR(inode->i_rdev)].xa_flags |= 0x01;
-    else
-	scsi_CDs[MINOR(inode->i_rdev)].xa_flags &= ~0x01;
-    if (no_multi)
-	scsi_CDs[MINOR(inode->i_rdev)].xa_flags |= 0x02;
-    return;
-}
-
-static int sr_open(struct inode * inode, struct file * filp)
-{
-    if(MINOR(inode->i_rdev) >= sr_template.nr_dev || 
-       !scsi_CDs[MINOR(inode->i_rdev)].device) return -ENXIO;   /* No such device */
-
-    if (filp->f_mode & 2)  
-	return -EROFS;
-
-    if(sr_template.usage_count) (*sr_template.usage_count)++;
-
-    sr_ioctl(inode,filp,CDROMCLOSETRAY,0);
-    check_disk_change(inode->i_rdev);
-    
-    if(!scsi_CDs[MINOR(inode->i_rdev)].device->access_count++)
-	sr_ioctl(inode, NULL, SCSI_IOCTL_DOORLOCK, 0);
-    if (scsi_CDs[MINOR(inode->i_rdev)].device->host->hostt->usage_count)
-	(*scsi_CDs[MINOR(inode->i_rdev)].device->host->hostt->usage_count)++;
-    
-    sr_photocd(inode);
-    
-    /* If this device did not have media in the drive at boot time, then
-     * we would have been unable to get the sector size.  Check to see if
-     * this is the case, and try again.
-     */
-
-    if(scsi_CDs[MINOR(inode->i_rdev)].needs_sector_size)
-	get_sectorsize(MINOR(inode->i_rdev));
-
-    return 0;
-}
-
-
-/*
- * do_sr_request() is the request handler function for the sr driver.
- * Its function in life is to take block device requests, and
- * translate them to SCSI commands.  
- */
-
-static void do_sr_request (void)
-{
-    Scsi_Cmnd * SCpnt = NULL;
-    struct request * req = NULL;
-    Scsi_Device * SDev;
-    unsigned long flags;
-    int flag = 0;
-    
-    while (1==1){
-	save_flags(flags);
-	cli();
-	if (CURRENT != NULL && CURRENT->rq_status == RQ_INACTIVE) {
-	    restore_flags(flags);
-	    return;
-	};
-	
-	INIT_SCSI_REQUEST;
- 
-	SDev = scsi_CDs[DEVICE_NR(CURRENT->rq_dev)].device;
-	
-	/*
-	 * I am not sure where the best place to do this is.  We need
-	 * to hook in a place where we are likely to come if in user
-	 * space.
-	 */
-	if( SDev->was_reset )
-	{
- 	    /*
- 	     * We need to relock the door, but we might
- 	     * be in an interrupt handler.  Only do this
- 	     * from user space, since we do not want to
- 	     * sleep from an interrupt.
- 	     */
- 	    if( SDev->removable && !intr_count )
- 	    {
-		scsi_ioctl(SDev, SCSI_IOCTL_DOORLOCK, 0);
- 	    }
- 	    SDev->was_reset = 0;
-	}
-	
-	if (flag++ == 0)
-	    SCpnt = allocate_device(&CURRENT,
-				    scsi_CDs[DEVICE_NR(CURRENT->rq_dev)].device, 0); 
-	else SCpnt = NULL;
-	restore_flags(flags);
-	
-	/* This is a performance enhancement.  We dig down into the request list and
-	 * try to find a queueable request (i.e. device not busy, and host able to
-	 * accept another command.  If we find one, then we queue it. This can
-	 * make a big difference on systems with more than one disk drive.  We want
-	 * to have the interrupts off when monkeying with the request list, because
-	 * otherwise the kernel might try to slip in a request in between somewhere. */
-	
-	if (!SCpnt && sr_template.nr_dev > 1){
-	    struct request *req1;
-	    req1 = NULL;
-	    save_flags(flags);
-	    cli();
-	    req = CURRENT;
-	    while(req){
-		SCpnt = request_queueable(req,
-					  scsi_CDs[DEVICE_NR(req->rq_dev)].device);
-		if(SCpnt) break;
-		req1 = req;
-		req = req->next;
-	    };
-	    if (SCpnt && req->rq_status == RQ_INACTIVE) {
-		if (req == CURRENT) 
-		    CURRENT = CURRENT->next;
-		else
-		    req1->next = req->next;
-	    };
-	    restore_flags(flags);
-	};
-	
-	if (!SCpnt)
-	    return; /* Could not find anything to do */
-	
-	wake_up(&wait_for_request);
-
-	/* Queue command */
-	requeue_sr_request(SCpnt);
-    };  /* While */
-}    
-
-void requeue_sr_request (Scsi_Cmnd * SCpnt)
-{
-	unsigned int dev, block, realcount;
-	unsigned char cmd[10], *buffer, tries;
-	int this_count, start, end_rec;
-    
-	tries = 2;
-    
- repeat:
-	if(!SCpnt || SCpnt->request.rq_status == RQ_INACTIVE) {
-		do_sr_request();
-		return;
-	}
-    
-	dev =  MINOR(SCpnt->request.rq_dev);
-	block = SCpnt->request.sector;	
-	buffer = NULL;
-	this_count = 0;
-    
-	if (dev >= sr_template.nr_dev) {
-		/* printk("CD-ROM request error: invalid device.\n");			*/
-		SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.nr_sectors);
-		tries = 2;
-		goto repeat;
-	}
-    
-	if (!scsi_CDs[dev].use) {
-		/* printk("CD-ROM request error: device marked not in use.\n");		*/
-		SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.nr_sectors);
-		tries = 2;
-		goto repeat;
-	}
-    
-	if (scsi_CDs[dev].device->changed) {
-	/* 
-	 * quietly refuse to do anything to a changed disc 
-	 * until the changed bit has been reset
-	 */
-		/* printk("CD-ROM has been changed.  Prohibiting further I/O.\n");	*/
-		SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.nr_sectors);
-		tries = 2;
-		goto repeat;
-	}
-	
-	switch (SCpnt->request.cmd)
-    {
-    case WRITE: 		
-	SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.nr_sectors);
-	goto repeat;
-	break;
-    case READ : 
-	cmd[0] = READ_6;
-	break;
-    default : 
-	panic ("Unknown sr command %d\n", SCpnt->request.cmd);
-    }
-	
-	cmd[1] = (SCpnt->lun << 5) & 0xe0;
-    
-    /*
-     * Now do the grungy work of figuring out which sectors we need, and
-     * where in memory we are going to put them.
-     * 
-     * The variables we need are:
-     * 
-     * this_count= number of 512 byte sectors being read 
-     * block     = starting cdrom sector to read.
-     * realcount = # of cdrom sectors to read
-     * 
-     * The major difference between a scsi disk and a scsi cdrom
-     * is that we will always use scatter-gather if we can, because we can
-     * work around the fact that the buffer cache has a block size of 1024,
-     * and we have 2048 byte sectors.  This code should work for buffers that
-     * are any multiple of 512 bytes long.
-     */
-    
-	SCpnt->use_sg = 0;
-    
-	if (SCpnt->host->sg_tablesize > 0 &&
-	    (!need_isa_buffer ||
-	 dma_free_sectors >= 10)) {
-	struct buffer_head * bh;
-	struct scatterlist * sgpnt;
-	int count, this_count_max;
-	bh = SCpnt->request.bh;
-	this_count = 0;
-	count = 0;
-	this_count_max = (scsi_CDs[dev].ten ? 0xffff : 0xff) << 4;
-	/* Calculate how many links we can use.  First see if we need
-	 * a padding record at the start */
-	this_count = SCpnt->request.sector % 4;
-	if(this_count) count++;
-	while(bh && count < SCpnt->host->sg_tablesize) {
-	    if ((this_count + (bh->b_size >> 9)) > this_count_max) break;
-	    this_count += (bh->b_size >> 9);
-	    count++;
-	    bh = bh->b_reqnext;
-	};
-	/* Fix up in case of an odd record at the end */
-	end_rec = 0;
-	if(this_count % 4) {
-	    if (count < SCpnt->host->sg_tablesize) {
-		count++;
-		end_rec = (4 - (this_count % 4)) << 9;
-		this_count += 4 - (this_count % 4);
-	    } else {
-		count--;
-		this_count -= (this_count % 4);
-	    };
-	};
-	SCpnt->use_sg = count;  /* Number of chains */
-	/* scsi_malloc can only allocate in chunks of 512 bytes */
-	count  = (SCpnt->use_sg * sizeof(struct scatterlist) + 511) & ~511;
-
-	SCpnt->sglist_len = count;
-	sgpnt = (struct scatterlist * ) scsi_malloc(count);
-	if (!sgpnt) {
-	    printk("Warning - running *really* short on DMA buffers\n");
-	    SCpnt->use_sg = 0;  /* No memory left - bail out */
-	} else {
-	    buffer = (unsigned char *) sgpnt;
-	    count = 0;
-	    bh = SCpnt->request.bh;
-	    if(SCpnt->request.sector % 4) {
-		sgpnt[count].length = (SCpnt->request.sector % 4) << 9;
-		sgpnt[count].address = (char *) scsi_malloc(sgpnt[count].length);
-		if(!sgpnt[count].address) panic("SCSI DMA pool exhausted.");
-		sgpnt[count].alt_address = sgpnt[count].address; /* Flag to delete
-								    if needed */
-		count++;
-	    };
-	    for(bh = SCpnt->request.bh; count < SCpnt->use_sg; 
-		count++, bh = bh->b_reqnext) {
-		if (bh) { /* Need a placeholder at the end of the record? */
-		    sgpnt[count].address = bh->b_data;
-		    sgpnt[count].length = bh->b_size;
-		    sgpnt[count].alt_address = NULL;
-		} else {
-		    sgpnt[count].address = (char *) scsi_malloc(end_rec);
-		    if(!sgpnt[count].address) panic("SCSI DMA pool exhausted.");
-		    sgpnt[count].length = end_rec;
-		    sgpnt[count].alt_address = sgpnt[count].address;
-		    if (count+1 != SCpnt->use_sg) panic("Bad sr request list");
-		    break;
-		};
-		if (((long) sgpnt[count].address) + sgpnt[count].length - 1 >
-		    ISA_DMA_THRESHOLD && SCpnt->host->unchecked_isa_dma) {
-		    sgpnt[count].alt_address = sgpnt[count].address;
-		    /* We try to avoid exhausting the DMA pool, since it is easier
-		     * to control usage here.  In other places we might have a more
-		     * pressing need, and we would be screwed if we ran out */
-		    if(dma_free_sectors < (sgpnt[count].length >> 9) + 5) {
-			sgpnt[count].address = NULL;
-		    } else {
-			sgpnt[count].address = (char *) scsi_malloc(sgpnt[count].length);
-		    };
-		    /* If we start running low on DMA buffers, we abort the scatter-gather
-		     * operation, and free all of the memory we have allocated.  We want to
-		     * ensure that all scsi operations are able to do at least a non-scatter/gather
-		     * operation */
-		    if(sgpnt[count].address == NULL){ /* Out of dma memory */
-			printk("Warning: Running low on SCSI DMA buffers");
-			/* Try switching back to a non scatter-gather operation. */
-			while(--count >= 0){
-			    if(sgpnt[count].alt_address) 
-				scsi_free(sgpnt[count].address, sgpnt[count].length);
-			};
-			SCpnt->use_sg = 0;
-			scsi_free(buffer, SCpnt->sglist_len);
-			break;
-		    }; /* if address == NULL */
-		};  /* if need DMA fixup */
-	    };  /* for loop to fill list */
-#ifdef DEBUG
-	    printk("SR: %d %d %d %d %d *** ",SCpnt->use_sg, SCpnt->request.sector,
-		   this_count, 
-		   SCpnt->request.current_nr_sectors,
-		   SCpnt->request.nr_sectors);
-	    for(count=0; count<SCpnt->use_sg; count++)
-		printk("SGlist: %d %x %x %x\n", count,
-		       sgpnt[count].address, 
-		       sgpnt[count].alt_address, 
-		       sgpnt[count].length);
-#endif
-	};  /* Able to allocate scatter-gather list */
-	};
-	
-	if (SCpnt->use_sg == 0){
-	/* We cannot use scatter-gather.  Do this the old fashion way */
-	if (!SCpnt->request.bh)  	
-	    this_count = SCpnt->request.nr_sectors;
-	else
-	    this_count = (SCpnt->request.bh->b_size >> 9);
-	
-	start = block % 4;
-	if (start)
-	    {				  
-	    this_count = ((this_count > 4 - start) ? 
-			  (4 - start) : (this_count));
-	    buffer = (unsigned char *) scsi_malloc(2048);
-	    } 
-	else if (this_count < 4)
-	    {
-	    buffer = (unsigned char *) scsi_malloc(2048);
-	    }
-	else
-	    {
-	    this_count -= this_count % 4;
-	    buffer = (unsigned char *) SCpnt->request.buffer;
-	    if (((long) buffer) + (this_count << 9) > ISA_DMA_THRESHOLD &&
-		SCpnt->host->unchecked_isa_dma)
-		buffer = (unsigned char *) scsi_malloc(this_count << 9);
-	    }
-	};
-    
-	if (scsi_CDs[dev].sector_size == 2048)
-	block = block >> 2; /* These are the sectors that the cdrom uses */
-	else
-	block = block & 0xfffffffc;
-    
-	realcount = (this_count + 3) / 4;
-    
-	if (scsi_CDs[dev].sector_size == 512) realcount = realcount << 2;
-    
-	if (((realcount > 0xff) || (block > 0x1fffff)) && scsi_CDs[dev].ten) 
-    {
-		if (realcount > 0xffff)
-	{
-			realcount = 0xffff;
-			this_count = realcount * (scsi_CDs[dev].sector_size >> 9);
-	}
-	
-		cmd[0] += READ_10 - READ_6 ;
-		cmd[2] = (unsigned char) (block >> 24) & 0xff;
-		cmd[3] = (unsigned char) (block >> 16) & 0xff;
-		cmd[4] = (unsigned char) (block >> 8) & 0xff;
-		cmd[5] = (unsigned char) block & 0xff;
-		cmd[6] = cmd[9] = 0;
-		cmd[7] = (unsigned char) (realcount >> 8) & 0xff;
-		cmd[8] = (unsigned char) realcount & 0xff;
-    }
-	else
-    {
-	if (realcount > 0xff)
-	{
-	    realcount = 0xff;
-	    this_count = realcount * (scsi_CDs[dev].sector_size >> 9);
-	}
-	
-	cmd[1] |= (unsigned char) ((block >> 16) & 0x1f);
-	cmd[2] = (unsigned char) ((block >> 8) & 0xff);
-	cmd[3] = (unsigned char) block & 0xff;
-	cmd[4] = (unsigned char) realcount;
-	cmd[5] = 0;
-    }   
-    
-#ifdef DEBUG
-    { 
-	int i;
-	printk("ReadCD: %d %d %d %d\n",block, realcount, buffer, this_count);
-	printk("Use sg: %d\n", SCpnt->use_sg);
-	printk("Dumping command: ");
-	for(i=0; i<12; i++) printk("%2.2x ", cmd[i]);
-	printk("\n");
-    };
-#endif
-    
-    /* Some dumb host adapters can speed transfers by knowing the
-     * minimum transfersize in advance.
-     *
-     * We shouldn't disconnect in the middle of a sector, but the cdrom
-     * sector size can be larger than the size of a buffer and the
-     * transfer may be split to the size of a buffer.  So it's safe to
-     * assume that we can at least transfer the minimum of the buffer
-     * size (1024) and the sector size between each connect / disconnect.
-     */
-    
-    SCpnt->transfersize = (scsi_CDs[dev].sector_size > 1024) ?
-	1024 : scsi_CDs[dev].sector_size;
-    
-	SCpnt->this_count = this_count;
-	scsi_do_cmd (SCpnt, (void *) cmd, buffer, 
-		 realcount * scsi_CDs[dev].sector_size, 
-		 rw_intr, SR_TIMEOUT, MAX_RETRIES);
-}
-
-static int sr_detect(Scsi_Device * SDp){
-    
-    if(SDp->type != TYPE_ROM && SDp->type != TYPE_WORM) return 0;
-
-#ifdef MACH
-    printk("Detected scsi CD-ROM cd%d at scsi%d, channel %d, id %d, lun %d\n",
-#else
-    printk("Detected scsi CD-ROM sr%d at scsi%d, channel %d, id %d, lun %d\n",
-#endif
-	   sr_template.dev_noticed++,
-	   SDp->host->host_no, SDp->channel, SDp->id, SDp->lun); 
-    
-    return 1;
-}
-
-static int sr_attach(Scsi_Device * SDp){
-    Scsi_CD * cpnt;
-    int i;
-    
-    if(SDp->type != TYPE_ROM && SDp->type != TYPE_WORM) return 1;
-    
-    if (sr_template.nr_dev >= sr_template.dev_max)
-    {
-	SDp->attached--;
-	return 1;
-    }
-    
-    for(cpnt = scsi_CDs, i=0; i<sr_template.dev_max; i++, cpnt++) 
-	if(!cpnt->device) break;
-    
-    if(i >= sr_template.dev_max) panic ("scsi_devices corrupt (sr)");
-    
-    SDp->scsi_request_fn = do_sr_request;
-    scsi_CDs[i].device = SDp;
-    sr_template.nr_dev++;
-    if(sr_template.nr_dev > sr_template.dev_max)
-	panic ("scsi_devices corrupt (sr)");
-    return 0;
-}
-
-
-static void sr_init_done (Scsi_Cmnd * SCpnt)
-{
-    struct request * req;
-    
-    req = &SCpnt->request;
-    req->rq_status = RQ_SCSI_DONE; /* Busy, but indicate request done */
-    
-    if (req->sem != NULL) {
-	up(req->sem);
-    }
-}
-
-void get_sectorsize(int i){
-    unsigned char cmd[10];
-    unsigned char *buffer;
-    int the_result, retries;
-    Scsi_Cmnd * SCpnt;
-    
-    buffer = (unsigned char *) scsi_malloc(512);
-    SCpnt = allocate_device(NULL, scsi_CDs[i].device, 1);
-    
-    retries = 3;
-    do {
-	cmd[0] = READ_CAPACITY;
-	cmd[1] = (scsi_CDs[i].device->lun << 5) & 0xe0;
-	memset ((void *) &cmd[2], 0, 8);
-	SCpnt->request.rq_status = RQ_SCSI_BUSY;  /* Mark as really busy */
-	SCpnt->cmd_len = 0;
-	
-	memset(buffer, 0, 8);
-
-	/* Do the command and wait.. */
-	{
-	    struct semaphore sem = MUTEX_LOCKED;
-	    SCpnt->request.sem = &sem;
-	    scsi_do_cmd (SCpnt,
-			 (void *) cmd, (void *) buffer,
-			 512, sr_init_done,  SR_TIMEOUT,
-			 MAX_RETRIES);
-	    down(&sem);
-	}
-	
-	the_result = SCpnt->result;
-	retries--;
-	
-    } while(the_result && retries);
-    
-    SCpnt->request.rq_status = RQ_INACTIVE;  /* Mark as not busy */
-    
-    wake_up(&SCpnt->device->device_wait); 
-    
-    if (the_result) {
-	scsi_CDs[i].capacity = 0x1fffff;
-	scsi_CDs[i].sector_size = 2048;  /* A guess, just in case */
-	scsi_CDs[i].needs_sector_size = 1;
-    } else {
-	scsi_CDs[i].capacity = 1 + ((buffer[0] << 24) |
-				    (buffer[1] << 16) |
-				    (buffer[2] << 8) |
-				    buffer[3]);
-	scsi_CDs[i].sector_size = (buffer[4] << 24) |
-	    (buffer[5] << 16) | (buffer[6] << 8) | buffer[7];
-	switch (scsi_CDs[i].sector_size) {
-		/*
-		 * HP 4020i CD-Recorder reports 2340 byte sectors
-		 * Philips CD-Writers report 2352 byte sectors
-		 *
-		 * Use 2k sectors for them..
-		 */
-		case 0: case 2340: case 2352:
-			scsi_CDs[i].sector_size = 2048;
-			/* fall through */
-		case 2048:
-			scsi_CDs[i].capacity *= 4;
-			/* fall through */
-		case 512:
-			break;
-		default:
-#ifdef MACH
-			printk ("cd%d : unsupported sector size %d.\n",
-				i, scsi_CDs[i].sector_size);
-#else
-			printk ("scd%d : unsupported sector size %d.\n",
-				i, scsi_CDs[i].sector_size);
-#endif
-			scsi_CDs[i].capacity = 0;
-			scsi_CDs[i].needs_sector_size = 1;
-	}
-	scsi_CDs[i].needs_sector_size = 0;
-	sr_sizes[i] = scsi_CDs[i].capacity >> (BLOCK_SIZE_BITS - 9);
-    };
-    scsi_free(buffer, 512);
-}
-
-static int sr_registered = 0;
-
-static int sr_init()
-{
-    int i;
-
-    if(sr_template.dev_noticed == 0) return 0;
-
-    if(!sr_registered) {
-	if (register_blkdev(MAJOR_NR,"sr",&sr_fops)) {
-	    printk("Unable to get major %d for SCSI-CD\n",MAJOR_NR);
-	    return 1;
-	}
-	sr_registered++;
-    }
-
-    
-    if (scsi_CDs) return 0;
-    sr_template.dev_max = sr_template.dev_noticed + SR_EXTRA_DEVS;
-    scsi_CDs = (Scsi_CD *) scsi_init_malloc(sr_template.dev_max * sizeof(Scsi_CD), GFP_ATOMIC);
-    memset(scsi_CDs, 0, sr_template.dev_max * sizeof(Scsi_CD));
-
-    sr_sizes = (int *) scsi_init_malloc(sr_template.dev_max * sizeof(int), GFP_ATOMIC);
-    memset(sr_sizes, 0, sr_template.dev_max * sizeof(int));
-
-    sr_blocksizes = (int *) scsi_init_malloc(sr_template.dev_max * 
-					 sizeof(int), GFP_ATOMIC);
-    for(i=0;i<sr_template.dev_max;i++) sr_blocksizes[i] = 2048;
-    blksize_size[MAJOR_NR] = sr_blocksizes;
-    return 0;
-}
-
-void sr_finish()
-{
-    int i;
-    
-    blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST;
-    blk_size[MAJOR_NR] = sr_sizes;	
-
-    for (i = 0; i < sr_template.nr_dev; ++i)
-    {
-	/* If we have already seen this, then skip it.  Comes up
-	 * with loadable modules. */
-	if (scsi_CDs[i].capacity) continue;
-	scsi_CDs[i].capacity = 0x1fffff;
-	scsi_CDs[i].sector_size = 2048;  /* A guess, just in case */
-	scsi_CDs[i].needs_sector_size = 1;
-#if 0
-	/* seems better to leave this for later */
-	get_sectorsize(i);
-	printk("Scd sectorsize = %d bytes.\n", scsi_CDs[i].sector_size);
-#endif
-	scsi_CDs[i].use = 1;
-	scsi_CDs[i].ten = 1;
-	scsi_CDs[i].remap = 1;
-	scsi_CDs[i].auto_eject = 0; /* Default is not to eject upon unmount. */
-	sr_sizes[i] = scsi_CDs[i].capacity >> (BLOCK_SIZE_BITS - 9);
-    }
-    
-    
-    /* If our host adapter is capable of scatter-gather, then we increase
-     * the read-ahead to 16 blocks (32 sectors).  If not, we use
-     * a two block (4 sector) read ahead. */
-    if(scsi_CDs[0].device && scsi_CDs[0].device->host->sg_tablesize)
-	read_ahead[MAJOR_NR] = 32;  /* 32 sector read-ahead.  Always removable. */
-    else
-	read_ahead[MAJOR_NR] = 4;  /* 4 sector read-ahead */
-
-    return;
-}	
-
-static void sr_detach(Scsi_Device * SDp)
-{
-    Scsi_CD * cpnt;
-    int i;
-    
-    for(cpnt = scsi_CDs, i=0; i<sr_template.dev_max; i++, cpnt++) 
-	if(cpnt->device == SDp) {
-	    kdev_t devi = MKDEV(MAJOR_NR, i);
-
-	    /*
-	     * Since the cdrom is read-only, no need to sync the device.
-	     * We should be kind to our buffer cache, however.
-	     */
-	    invalidate_inodes(devi);
-	    invalidate_buffers(devi);
-	    
-	    /*
-	     * Reset things back to a sane state so that one can re-load a new
-	     * driver (perhaps the same one).
-	     */
-	    cpnt->device = NULL;
-	    cpnt->capacity = 0;
-	    SDp->attached--;
-	    sr_template.nr_dev--;
-	    sr_template.dev_noticed--;
-	    sr_sizes[i] = 0;
-	    return;
-	}
-    return;
-}
-
-
-#ifdef MODULE
-
-int init_module(void) {
-    sr_template.usage_count = &mod_use_count_;
-    return scsi_register_module(MODULE_SCSI_DEV, &sr_template);
-}
-
-void cleanup_module( void) 
-{
-    scsi_unregister_module(MODULE_SCSI_DEV, &sr_template);
-    unregister_blkdev(SCSI_CDROM_MAJOR, "sr");
-    sr_registered--;
-    if(scsi_CDs != NULL) {
-	scsi_init_free((char *) scsi_CDs,
-		       (sr_template.dev_noticed + SR_EXTRA_DEVS) 
-		       * sizeof(Scsi_CD));
-	
-	scsi_init_free((char *) sr_sizes, sr_template.dev_max * sizeof(int));
-	scsi_init_free((char *) sr_blocksizes, sr_template.dev_max * sizeof(int));
-    }
-    
-    blksize_size[MAJOR_NR] = NULL;
-    blk_dev[MAJOR_NR].request_fn = NULL;
-    blk_size[MAJOR_NR] = NULL;	
-    read_ahead[MAJOR_NR] = 0;
-    
-    sr_template.dev_max = 0;
-}
-#endif /* MODULE */
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-indent-level: 4
- * c-brace-imaginary-offset: 0
- * c-brace-offset: -4
- * c-argdecl-indent: 4
- * c-label-offset: -4
- * c-continued-statement-offset: 4
- * c-continued-brace-offset: 0
- * indent-tabs-mode: nil
- * tab-width: 8
- * End:
- */