1 // SPDX-License-Identifier: GPL-2.0
2 /* -*-linux-c-*-
4  * vendor-specific code for SCSI CD-ROM's goes here.
7  * the like) are too new to be included into the SCSI-II standard (to
10  * Aug 1997: Ha! Got a SCSI-3 cdrom spec across my fingers. SCSI-3 does
13  *           Rearranged stuff here: SCSI-3 is included allways, support
16  *   Gerd Knorr <kraxel@cs.tu-berlin.de> 
18  * --------------------------------------------------------------------------
20  * support for XA/multisession-CD's
22  *   - NEC:     Detection and support of multisession CD's.
24  *   - TOSHIBA: Detection and support of multisession CD's.
25  *              Some XA-Sector tweaking, required for older drives.
27  *   - SONY:    Detection and support of multisession CD's.
30  *   - PIONEER, HITACHI, PLEXTOR, MATSHITA, TEAC, PHILIPS: known to
33  *   - HP:      Much like SONY, but a little different... (Thomas)
34  *              HP-Writers only ??? Maybe other CD-Writers work with this too ?
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>
43 #include <linux/slab.h>
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>
51 #include "sr.h"
59 #define VENDOR_SCSI3           1	/* default: scsi-3 mmc */
63 #define VENDOR_WRITER          4	/* pre-scsi3 writers */
64 #define VENDOR_CYGNAL_85ED     5	/* CD-on-a-chip */
70 	const char *vendor = cd->device->vendor;  in sr_vendor_init()
71 	const char *model = cd->device->model;  in sr_vendor_init()
74 	cd->vendor = VENDOR_SCSI3;  in sr_vendor_init()
75 	if (cd->readcd_known)  in sr_vendor_init()
76 		/* this is true for scsi3/mmc drives - no more checks */  in sr_vendor_init()
79 	if (cd->device->type == TYPE_WORM) {  in sr_vendor_init()
80 		cd->vendor = VENDOR_WRITER;  in sr_vendor_init()
83 		cd->vendor = VENDOR_NEC;  in sr_vendor_init()
84 		if (!strncmp(model, "CD-ROM DRIVE:25", 15) ||  in sr_vendor_init()
85 		    !strncmp(model, "CD-ROM DRIVE:36", 15) ||  in sr_vendor_init()
86 		    !strncmp(model, "CD-ROM DRIVE:83", 15) ||  in sr_vendor_init()
87 		    !strncmp(model, "CD-ROM DRIVE:84 ", 16)  in sr_vendor_init()
89 		/* my NEC 3x returns the read-raw data if a read-raw  in sr_vendor_init()
90 		   is followed by a read for the same sector - aeb */  in sr_vendor_init()
91 		    || !strncmp(model, "CD-ROM DRIVE:500", 16)  in sr_vendor_init()
95 			cd->cdi.mask |= CDC_MULTI_SESSION;  in sr_vendor_init()
98 		cd->vendor = VENDOR_TOSHIBA;  in sr_vendor_init()
102 		/* The Beurer GL50 evo uses a Cygnal-manufactured CD-on-a-chip  in sr_vendor_init()
104 		   not-implemented commands are fine to fail, but a few,  in sr_vendor_init()
109 		cd->vendor = VENDOR_CYGNAL_85ED;  in sr_vendor_init()
110 		cd->cdi.mask |= (  in sr_vendor_init()
131 	if (cd->vendor == VENDOR_TOSHIBA)  in sr_set_blocklength()
136 		return -ENOMEM;  in sr_set_blocklength()
147 	modesel->block_desc_length = 0x08;  in sr_set_blocklength()
148 	modesel->density = density;  in sr_set_blocklength()
149 	modesel->block_length_med = (blocklength >> 8) & 0xff;  in sr_set_blocklength()
150 	modesel->block_length_lo = blocklength & 0xff;  in sr_set_blocklength()
156 		cd->device->sector_size = blocklength;  in sr_set_blocklength()
173 	Scsi_CD *cd = cdi->handle;  in sr_cd_check()
179 	if (cd->cdi.mask & CDC_MULTI_SESSION)  in sr_cd_check()
184 		return -ENOMEM;  in sr_cd_check()
192 	switch (cd->vendor) {  in sr_cd_check()
240 			min = bcd2bin(buffer[15]);  in sr_cd_check()
250 			/* we request some disc information (is it a XA-CD ?,  in sr_cd_check()
260 			if (rc == -EINVAL) {  in sr_cd_check()
273 				sector -= CD_MSF_OFFSET;  in sr_cd_check()
317 			  cd->vendor);  in sr_cd_check()
322 	cd->ms_offset = sector;  in sr_cd_check()
323 	cd->xa_flag = 0;  in sr_cd_check()
325 		cd->xa_flag = 1;  in sr_cd_check()
327 	if (2048 != cd->device->sector_size) {  in sr_cd_check()
331 		cdi->mask |= CDC_MULTI_SESSION;  in sr_cd_check()