[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / sr_vendor.c

// SPDX-License-Identifier: GPL-2.0
/* -*-linux-c-*-

 * vendor-specific code for SCSI CD-ROM's goes here.
 *
 * This is needed becauce most of the new features (multisession and
 * the like) are too new to be included into the SCSI-II standard (to
 * be exact: there is'nt anything in my draft copy).
 *
 * Aug 1997: Ha! Got a SCSI-3 cdrom spec across my fingers. SCSI-3 does
 *           multisession using the READ TOC command (like SONY).
 *
 *           Rearranged stuff here: SCSI-3 is included allways, support
 *           for NEC/TOSHIBA/HP commands is optional.
 *
 *   Gerd Knorr <kraxel@cs.tu-berlin.de> 
 *
 * --------------------------------------------------------------------------
 *
 * support for XA/multisession-CD's
 * 
 *   - NEC:     Detection and support of multisession CD's.
 *     
 *   - TOSHIBA: Detection and support of multisession CD's.
 *              Some XA-Sector tweaking, required for older drives.
 *
 *   - SONY:    Detection and support of multisession CD's.
 *              added by Thomas Quinot <thomas@cuivre.freenix.fr>
 *
 *   - PIONEER, HITACHI, PLEXTOR, MATSHITA, TEAC, PHILIPS: known to
 *              work with SONY (SCSI3 now)  code.
 *
 *   - HP:      Much like SONY, but a little different... (Thomas)
 *              HP-Writers only ??? Maybe other CD-Writers work with this too ?
 *              HP 6020 writers now supported.
 */

#include <linux/cdrom.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/bcd.h>
#include <linux/blkdev.h>
#include <linux/slab.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_ioctl.h>

#include "sr.h"

#if 0
#define DEBUG
#endif

/* here are some constants to sort the vendors into groups */

#define VENDOR_SCSI3           1	/* default: scsi-3 mmc */

#define VENDOR_NEC             2
#define VENDOR_TOSHIBA         3
#define VENDOR_WRITER          4	/* pre-scsi3 writers */

#define VENDOR_TIMEOUT	30*HZ

void sr_vendor_init(Scsi_CD *cd)
{
#ifndef CONFIG_BLK_DEV_SR_VENDOR
	cd->vendor = VENDOR_SCSI3;
#else
	const char *vendor = cd->device->vendor;
	const char *model = cd->device->model;
	
	/* default */
	cd->vendor = VENDOR_SCSI3;
	if (cd->readcd_known)
		/* this is true for scsi3/mmc drives - no more checks */
		return;

	if (cd->device->type == TYPE_WORM) {
		cd->vendor = VENDOR_WRITER;

	} else if (!strncmp(vendor, "NEC", 3)) {
		cd->vendor = VENDOR_NEC;
		if (!strncmp(model, "CD-ROM DRIVE:25", 15) ||
		    !strncmp(model, "CD-ROM DRIVE:36", 15) ||
		    !strncmp(model, "CD-ROM DRIVE:83", 15) ||
		    !strncmp(model, "CD-ROM DRIVE:84 ", 16)
#if 0
		/* my NEC 3x returns the read-raw data if a read-raw
		   is followed by a read for the same sector - aeb */
		    || !strncmp(model, "CD-ROM DRIVE:500", 16)
#endif
		    )
			/* these can't handle multisession, may hang */
			cd->cdi.mask |= CDC_MULTI_SESSION;

	} else if (!strncmp(vendor, "TOSHIBA", 7)) {
		cd->vendor = VENDOR_TOSHIBA;

	}
#endif
}


/* small handy function for switching block length using MODE SELECT,
 * used by sr_read_sector() */

int sr_set_blocklength(Scsi_CD *cd, int blocklength)
{
	unsigned char *buffer;	/* the buffer for the ioctl */
	struct packet_command cgc;
	struct ccs_modesel_head *modesel;
	int rc, density = 0;

#ifdef CONFIG_BLK_DEV_SR_VENDOR
	if (cd->vendor == VENDOR_TOSHIBA)
		density = (blocklength > 2048) ? 0x81 : 0x83;
#endif

	buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
	if (!buffer)
		return -ENOMEM;

#ifdef DEBUG
	sr_printk(KERN_INFO, cd, "MODE SELECT 0x%x/%d\n", density, blocklength);
#endif
	memset(&cgc, 0, sizeof(struct packet_command));
	cgc.cmd[0] = MODE_SELECT;
	cgc.cmd[1] = (1 << 4);
	cgc.cmd[4] = 12;
	modesel = (struct ccs_modesel_head *) buffer;
	memset(modesel, 0, sizeof(*modesel));
	modesel->block_desc_length = 0x08;
	modesel->density = density;
	modesel->block_length_med = (blocklength >> 8) & 0xff;
	modesel->block_length_lo = blocklength & 0xff;
	cgc.buffer = buffer;
	cgc.buflen = sizeof(*modesel);
	cgc.data_direction = DMA_TO_DEVICE;
	cgc.timeout = VENDOR_TIMEOUT;
	if (0 == (rc = sr_do_ioctl(cd, &cgc))) {
		cd->device->sector_size = blocklength;
	}
#ifdef DEBUG
	else
		sr_printk(KERN_INFO, cd,
			  "switching blocklength to %d bytes failed\n",
			  blocklength);
#endif
	kfree(buffer);
	return rc;
}

/* This function gets called after a media change. Checks if the CD is
   multisession, asks for offset etc. */

int sr_cd_check(struct cdrom_device_info *cdi)
{
	Scsi_CD *cd = cdi->handle;
	unsigned long sector;
	unsigned char *buffer;	/* the buffer for the ioctl */
	struct packet_command cgc;
	int rc, no_multi;

	if (cd->cdi.mask & CDC_MULTI_SESSION)
		return 0;

	buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
	if (!buffer)
		return -ENOMEM;

	sector = 0;		/* the multisession sector offset goes here  */
	no_multi = 0;		/* flag: the drive can't handle multisession */
	rc = 0;

	memset(&cgc, 0, sizeof(struct packet_command));

	switch (cd->vendor) {

	case VENDOR_SCSI3:
		cgc.cmd[0] = READ_TOC;
		cgc.cmd[8] = 12;
		cgc.cmd[9] = 0x40;
		cgc.buffer = buffer;
		cgc.buflen = 12;
		cgc.quiet = 1;
		cgc.data_direction = DMA_FROM_DEVICE;
		cgc.timeout = VENDOR_TIMEOUT;
		rc = sr_do_ioctl(cd, &cgc);
		if (rc != 0)
			break;
		if ((buffer[0] << 8) + buffer[1] < 0x0a) {
			sr_printk(KERN_INFO, cd, "Hmm, seems the drive "
			   "doesn't support multisession CD's\n");
			no_multi = 1;
			break;
		}
		sector = buffer[11] + (buffer[10] << 8) +
		    (buffer[9] << 16) + (buffer[8] << 24);
		if (buffer[6] <= 1) {
			/* ignore sector offsets from first track */
			sector = 0;
		}
		break;

#ifdef CONFIG_BLK_DEV_SR_VENDOR
	case VENDOR_NEC:{
			unsigned long min, sec, frame;
			cgc.cmd[0] = 0xde;
			cgc.cmd[1] = 0x03;
			cgc.cmd[2] = 0xb0;
			cgc.buffer = buffer;
			cgc.buflen = 0x16;
			cgc.quiet = 1;
			cgc.data_direction = DMA_FROM_DEVICE;
			cgc.timeout = VENDOR_TIMEOUT;
			rc = sr_do_ioctl(cd, &cgc);
			if (rc != 0)
				break;
			if (buffer[14] != 0 && buffer[14] != 0xb0) {
				sr_printk(KERN_INFO, cd, "Hmm, seems the cdrom "
					  "doesn't support multisession CD's\n");

				no_multi = 1;
				break;
			}
			min = bcd2bin(buffer[15]);
			sec = bcd2bin(buffer[16]);
			frame = bcd2bin(buffer[17]);
			sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
			break;
		}

	case VENDOR_TOSHIBA:{
			unsigned long min, sec, frame;

			/* we request some disc information (is it a XA-CD ?,
			 * where starts the last session ?) */
			cgc.cmd[0] = 0xc7;
			cgc.cmd[1] = 0x03;
			cgc.buffer = buffer;
			cgc.buflen = 4;
			cgc.quiet = 1;
			cgc.data_direction = DMA_FROM_DEVICE;
			cgc.timeout = VENDOR_TIMEOUT;
			rc = sr_do_ioctl(cd, &cgc);
			if (rc == -EINVAL) {
				sr_printk(KERN_INFO, cd, "Hmm, seems the drive "
					  "doesn't support multisession CD's\n");
				no_multi = 1;
				break;
			}
			if (rc != 0)
				break;
			min = bcd2bin(buffer[1]);
			sec = bcd2bin(buffer[2]);
			frame = bcd2bin(buffer[3]);
			sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
			if (sector)
				sector -= CD_MSF_OFFSET;
			sr_set_blocklength(cd, 2048);
			break;
		}

	case VENDOR_WRITER:
		cgc.cmd[0] = READ_TOC;
		cgc.cmd[8] = 0x04;
		cgc.cmd[9] = 0x40;
		cgc.buffer = buffer;
		cgc.buflen = 0x04;
		cgc.quiet = 1;
		cgc.data_direction = DMA_FROM_DEVICE;
		cgc.timeout = VENDOR_TIMEOUT;
		rc = sr_do_ioctl(cd, &cgc);
		if (rc != 0) {
			break;
		}
		if ((rc = buffer[2]) == 0) {
			sr_printk(KERN_WARNING, cd,
				  "No finished session\n");
			break;
		}
		cgc.cmd[0] = READ_TOC;	/* Read TOC */
		cgc.cmd[6] = rc & 0x7f;	/* number of last session */
		cgc.cmd[8] = 0x0c;
		cgc.cmd[9] = 0x40;
		cgc.buffer = buffer;
		cgc.buflen = 12;
		cgc.quiet = 1;
		cgc.data_direction = DMA_FROM_DEVICE;
		cgc.timeout = VENDOR_TIMEOUT;
		rc = sr_do_ioctl(cd, &cgc);
		if (rc != 0) {
			break;
		}
		sector = buffer[11] + (buffer[10] << 8) +
		    (buffer[9] << 16) + (buffer[8] << 24);
		break;
#endif				/* CONFIG_BLK_DEV_SR_VENDOR */

	default:
		/* should not happen */
		sr_printk(KERN_WARNING, cd,
			  "unknown vendor code (%i), not initialized ?\n",
			  cd->vendor);
		sector = 0;
		no_multi = 1;
		break;
	}
	cd->ms_offset = sector;
	cd->xa_flag = 0;
	if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd))
		cd->xa_flag = 1;

	if (2048 != cd->device->sector_size) {
		sr_set_blocklength(cd, 2048);
	}
	if (no_multi)
		cdi->mask |= CDC_MULTI_SESSION;

#ifdef DEBUG
	if (sector)
		sr_printk(KERN_DEBUG, cd, "multisession offset=%lu\n",
			  sector);
#endif
	kfree(buffer);
	return rc;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/* --linux-c--
	3
	4	* vendor-specific code for SCSI CD-ROM's goes here.
	5	*
	6	* This is needed becauce most of the new features (multisession and
	7	* the like) are too new to be included into the SCSI-II standard (to
	8	* be exact: there is'nt anything in my draft copy).
	9	*
	10	* Aug 1997: Ha! Got a SCSI-3 cdrom spec across my fingers. SCSI-3 does
	11	* multisession using the READ TOC command (like SONY).
	12	*
	13	* Rearranged stuff here: SCSI-3 is included allways, support
	14	* for NEC/TOSHIBA/HP commands is optional.
	15	*
	16	* Gerd Knorr <kraxel@cs.tu-berlin.de>
	17	*
	18	* --------------------------------------------------------------------------
	19	*
	20	* support for XA/multisession-CD's
	21	*
	22	* - NEC: Detection and support of multisession CD's.
	23	*
	24	* - TOSHIBA: Detection and support of multisession CD's.
	25	* Some XA-Sector tweaking, required for older drives.
	26	*
	27	* - SONY: Detection and support of multisession CD's.
	28	* added by Thomas Quinot <thomas@cuivre.freenix.fr>
	29	*
	30	* - PIONEER, HITACHI, PLEXTOR, MATSHITA, TEAC, PHILIPS: known to
	31	* work with SONY (SCSI3 now) code.
	32	*
	33	* - HP: Much like SONY, but a little different... (Thomas)
	34	* HP-Writers only ??? Maybe other CD-Writers work with this too ?
	35	* HP 6020 writers now supported.
	36	*/
	37
1da177e4 LT	38	#include <linux/cdrom.h>
	39	#include <linux/errno.h>
	40	#include <linux/string.h>
	41	#include <linux/bcd.h>
	42	#include <linux/blkdev.h>
5a0e3ad6	43	#include <linux/slab.h>
1da177e4 LT	44
	45	#include <scsi/scsi.h>
	46	#include <scsi/scsi_cmnd.h>
	47	#include <scsi/scsi_device.h>
	48	#include <scsi/scsi_host.h>
	49	#include <scsi/scsi_ioctl.h>
	50
	51	#include "sr.h"
	52
	53	#if 0
	54	#define DEBUG
	55	#endif
	56
	57	/* here are some constants to sort the vendors into groups */
	58
	59	#define VENDOR_SCSI3 1 /* default: scsi-3 mmc */
	60
	61	#define VENDOR_NEC 2
	62	#define VENDOR_TOSHIBA 3
	63	#define VENDOR_WRITER 4 /* pre-scsi3 writers */
	64
	65	#define VENDOR_TIMEOUT 30*HZ
	66
	67	void sr_vendor_init(Scsi_CD *cd)
	68	{
	69	#ifndef CONFIG_BLK_DEV_SR_VENDOR
	70	cd->vendor = VENDOR_SCSI3;
	71	#else
7b32b8e0 MW	72	const char *vendor = cd->device->vendor;
7b32b8e0 MW	73	const char *model = cd->device->model;
1da177e4 LT	74
	75	/* default */
	76	cd->vendor = VENDOR_SCSI3;
	77	if (cd->readcd_known)
	78	/* this is true for scsi3/mmc drives - no more checks */
	79	return;
	80
	81	if (cd->device->type == TYPE_WORM) {
	82	cd->vendor = VENDOR_WRITER;
	83
	84	} else if (!strncmp(vendor, "NEC", 3)) {
	85	cd->vendor = VENDOR_NEC;
	86	if (!strncmp(model, "CD-ROM DRIVE:25", 15) \|\|
	87	!strncmp(model, "CD-ROM DRIVE:36", 15) \|\|
	88	!strncmp(model, "CD-ROM DRIVE:83", 15) \|\|
	89	!strncmp(model, "CD-ROM DRIVE:84 ", 16)
	90	#if 0
	91	/* my NEC 3x returns the read-raw data if a read-raw
	92	is followed by a read for the same sector - aeb */
	93	\|\| !strncmp(model, "CD-ROM DRIVE:500", 16)
	94	#endif
	95	)
	96	/* these can't handle multisession, may hang */
	97	cd->cdi.mask \|= CDC_MULTI_SESSION;
	98
	99	} else if (!strncmp(vendor, "TOSHIBA", 7)) {
	100	cd->vendor = VENDOR_TOSHIBA;
	101
	102	}
	103	#endif
	104	}
	105
	106
	107	/* small handy function for switching block length using MODE SELECT,
	108	* used by sr_read_sector() */
	109
	110	int sr_set_blocklength(Scsi_CD *cd, int blocklength)
	111	{
	112	unsigned char buffer; / the buffer for the ioctl */
	113	struct packet_command cgc;
	114	struct ccs_modesel_head *modesel;
	115	int rc, density = 0;
	116
	117	#ifdef CONFIG_BLK_DEV_SR_VENDOR
	118	if (cd->vendor == VENDOR_TOSHIBA)
	119	density = (blocklength > 2048) ? 0x81 : 0x83;
	120	#endif
	121
5cbded58	122	buffer = kmalloc(512, GFP_KERNEL \| GFP_DMA);
1da177e4 LT	123	if (!buffer)
	124	return -ENOMEM;
	125
	126	#ifdef DEBUG
96eefad2	127	sr_printk(KERN_INFO, cd, "MODE SELECT 0x%x/%d\n", density, blocklength);
1da177e4 LT	128	#endif
	129	memset(&cgc, 0, sizeof(struct packet_command));
	130	cgc.cmd[0] = MODE_SELECT;
	131	cgc.cmd[1] = (1 << 4);
	132	cgc.cmd[4] = 12;
	133	modesel = (struct ccs_modesel_head *) buffer;
	134	memset(modesel, 0, sizeof(*modesel));
	135	modesel->block_desc_length = 0x08;
	136	modesel->density = density;
	137	modesel->block_length_med = (blocklength >> 8) & 0xff;
	138	modesel->block_length_lo = blocklength & 0xff;
	139	cgc.buffer = buffer;
	140	cgc.buflen = sizeof(*modesel);
	141	cgc.data_direction = DMA_TO_DEVICE;
	142	cgc.timeout = VENDOR_TIMEOUT;
	143	if (0 == (rc = sr_do_ioctl(cd, &cgc))) {
	144	cd->device->sector_size = blocklength;
	145	}
	146	#ifdef DEBUG
	147	else
96eefad2 HR	148	sr_printk(KERN_INFO, cd,
	149	"switching blocklength to %d bytes failed\n",
	150	blocklength);
1da177e4 LT	151	#endif
	152	kfree(buffer);
	153	return rc;
	154	}
	155
	156	/* This function gets called after a media change. Checks if the CD is
	157	multisession, asks for offset etc. */
	158
	159	int sr_cd_check(struct cdrom_device_info *cdi)
	160	{
	161	Scsi_CD *cd = cdi->handle;
	162	unsigned long sector;
	163	unsigned char buffer; / the buffer for the ioctl */
	164	struct packet_command cgc;
	165	int rc, no_multi;
	166
	167	if (cd->cdi.mask & CDC_MULTI_SESSION)
	168	return 0;
	169
5cbded58	170	buffer = kmalloc(512, GFP_KERNEL \| GFP_DMA);
1da177e4 LT	171	if (!buffer)
	172	return -ENOMEM;
	173
	174	sector = 0; /* the multisession sector offset goes here */
	175	no_multi = 0; /* flag: the drive can't handle multisession */
	176	rc = 0;
	177
	178	memset(&cgc, 0, sizeof(struct packet_command));
	179
	180	switch (cd->vendor) {
	181
	182	case VENDOR_SCSI3:
	183	cgc.cmd[0] = READ_TOC;
	184	cgc.cmd[8] = 12;
	185	cgc.cmd[9] = 0x40;
	186	cgc.buffer = buffer;
	187	cgc.buflen = 12;
	188	cgc.quiet = 1;
	189	cgc.data_direction = DMA_FROM_DEVICE;
	190	cgc.timeout = VENDOR_TIMEOUT;
	191	rc = sr_do_ioctl(cd, &cgc);
	192	if (rc != 0)
	193	break;
	194	if ((buffer[0] << 8) + buffer[1] < 0x0a) {
96eefad2 HR	195	sr_printk(KERN_INFO, cd, "Hmm, seems the drive "
96eefad2 HR	196	"doesn't support multisession CD's\n");
1da177e4 LT	197	no_multi = 1;
	198	break;
	199	}
	200	sector = buffer[11] + (buffer[10] << 8) +
	201	(buffer[9] << 16) + (buffer[8] << 24);
	202	if (buffer[6] <= 1) {
	203	/* ignore sector offsets from first track */
	204	sector = 0;
	205	}
	206	break;
	207
	208	#ifdef CONFIG_BLK_DEV_SR_VENDOR
	209	case VENDOR_NEC:{
	210	unsigned long min, sec, frame;
	211	cgc.cmd[0] = 0xde;
	212	cgc.cmd[1] = 0x03;
	213	cgc.cmd[2] = 0xb0;
	214	cgc.buffer = buffer;
	215	cgc.buflen = 0x16;
	216	cgc.quiet = 1;
	217	cgc.data_direction = DMA_FROM_DEVICE;
	218	cgc.timeout = VENDOR_TIMEOUT;
	219	rc = sr_do_ioctl(cd, &cgc);
	220	if (rc != 0)
	221	break;
	222	if (buffer[14] != 0 && buffer[14] != 0xb0) {
96eefad2 HR	223	sr_printk(KERN_INFO, cd, "Hmm, seems the cdrom "
	224	"doesn't support multisession CD's\n");
	225
1da177e4 LT	226	no_multi = 1;
	227	break;
	228	}
2cee5dfa AB	229	min = bcd2bin(buffer[15]);
	230	sec = bcd2bin(buffer[16]);
	231	frame = bcd2bin(buffer[17]);
1da177e4 LT	232	sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
	233	break;
	234	}
	235
	236	case VENDOR_TOSHIBA:{
	237	unsigned long min, sec, frame;
	238
	239	/* we request some disc information (is it a XA-CD ?,
	240	* where starts the last session ?) */
	241	cgc.cmd[0] = 0xc7;
	242	cgc.cmd[1] = 0x03;
	243	cgc.buffer = buffer;
	244	cgc.buflen = 4;
	245	cgc.quiet = 1;
	246	cgc.data_direction = DMA_FROM_DEVICE;
	247	cgc.timeout = VENDOR_TIMEOUT;
	248	rc = sr_do_ioctl(cd, &cgc);
	249	if (rc == -EINVAL) {
96eefad2 HR	250	sr_printk(KERN_INFO, cd, "Hmm, seems the drive "
96eefad2 HR	251	"doesn't support multisession CD's\n");
1da177e4 LT	252	no_multi = 1;
	253	break;
	254	}
	255	if (rc != 0)
	256	break;
2cee5dfa AB	257	min = bcd2bin(buffer[1]);
	258	sec = bcd2bin(buffer[2]);
	259	frame = bcd2bin(buffer[3]);
1da177e4 LT	260	sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
	261	if (sector)
	262	sector -= CD_MSF_OFFSET;
	263	sr_set_blocklength(cd, 2048);
	264	break;
	265	}
	266
	267	case VENDOR_WRITER:
	268	cgc.cmd[0] = READ_TOC;
	269	cgc.cmd[8] = 0x04;
	270	cgc.cmd[9] = 0x40;
	271	cgc.buffer = buffer;
	272	cgc.buflen = 0x04;
	273	cgc.quiet = 1;
	274	cgc.data_direction = DMA_FROM_DEVICE;
	275	cgc.timeout = VENDOR_TIMEOUT;
	276	rc = sr_do_ioctl(cd, &cgc);
	277	if (rc != 0) {
	278	break;
	279	}
	280	if ((rc = buffer[2]) == 0) {
96eefad2 HR	281	sr_printk(KERN_WARNING, cd,
96eefad2 HR	282	"No finished session\n");
1da177e4 LT	283	break;
	284	}
	285	cgc.cmd[0] = READ_TOC; /* Read TOC */
	286	cgc.cmd[6] = rc & 0x7f; /* number of last session */
	287	cgc.cmd[8] = 0x0c;
	288	cgc.cmd[9] = 0x40;
	289	cgc.buffer = buffer;
	290	cgc.buflen = 12;
	291	cgc.quiet = 1;
	292	cgc.data_direction = DMA_FROM_DEVICE;
	293	cgc.timeout = VENDOR_TIMEOUT;
	294	rc = sr_do_ioctl(cd, &cgc);
	295	if (rc != 0) {
	296	break;
	297	}
	298	sector = buffer[11] + (buffer[10] << 8) +
	299	(buffer[9] << 16) + (buffer[8] << 24);
	300	break;
	301	#endif /* CONFIG_BLK_DEV_SR_VENDOR */
	302
	303	default:
	304	/* should not happen */
96eefad2 HR	305	sr_printk(KERN_WARNING, cd,
	306	"unknown vendor code (%i), not initialized ?\n",
	307	cd->vendor);
1da177e4 LT	308	sector = 0;
	309	no_multi = 1;
	310	break;
	311	}
	312	cd->ms_offset = sector;
	313	cd->xa_flag = 0;
	314	if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd))
	315	cd->xa_flag = 1;
	316
	317	if (2048 != cd->device->sector_size) {
	318	sr_set_blocklength(cd, 2048);
	319	}
	320	if (no_multi)
	321	cdi->mask \|= CDC_MULTI_SESSION;
	322
	323	#ifdef DEBUG
	324	if (sector)
96eefad2 HR	325	sr_printk(KERN_DEBUG, cd, "multisession offset=%lu\n",
96eefad2 HR	326	sector);
1da177e4 LT	327	#endif
	328	kfree(buffer);
	329	return rc;
	330	}