3 * vendor-specific code for SCSI CD-ROM's goes here.
5 * This is needed becauce most of the new features (multisession and
6 * the like) are too new to be included into the SCSI-II standard (to
7 * be exact: there is'nt anything in my draft copy).
9 * Aug 1997: Ha! Got a SCSI-3 cdrom spec across my fingers. SCSI-3 does
10 * multisession using the READ TOC command (like SONY).
12 * Rearranged stuff here: SCSI-3 is included allways, support
13 * for NEC/TOSHIBA/HP commands is optional.
15 * Gerd Knorr <kraxel@cs.tu-berlin.de>
17 * --------------------------------------------------------------------------
19 * support for XA/multisession-CD's
21 * - NEC: Detection and support of multisession CD's.
23 * - TOSHIBA: Detection and support of multisession CD's.
24 * Some XA-Sector tweaking, required for older drives.
26 * - SONY: Detection and support of multisession CD's.
27 * added by Thomas Quinot <thomas@cuivre.freenix.fr>
29 * - PIONEER, HITACHI, PLEXTOR, MATSHITA, TEAC, PHILIPS: known to
30 * work with SONY (SCSI3 now) code.
32 * - HP: Much like SONY, but a little different... (Thomas)
33 * HP-Writers only ??? Maybe other CD-Writers work with this too ?
34 * HP 6020 writers now supported.
37 #include <linux/config.h>
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>
44 #include <scsi/scsi.h>
45 #include <scsi/scsi_cmnd.h>
46 #include <scsi/scsi_device.h>
47 #include <scsi/scsi_host.h>
48 #include <scsi/scsi_ioctl.h>
56 /* here are some constants to sort the vendors into groups */
58 #define VENDOR_SCSI3 1 /* default: scsi-3 mmc */
61 #define VENDOR_TOSHIBA 3
62 #define VENDOR_WRITER 4 /* pre-scsi3 writers */
64 #define VENDOR_TIMEOUT 30*HZ
66 void sr_vendor_init(Scsi_CD
*cd
)
68 #ifndef CONFIG_BLK_DEV_SR_VENDOR
69 cd
->vendor
= VENDOR_SCSI3
;
71 char *vendor
= cd
->device
->vendor
;
72 char *model
= cd
->device
->model
;
75 cd
->vendor
= VENDOR_SCSI3
;
77 /* this is true for scsi3/mmc drives - no more checks */
80 if (cd
->device
->type
== TYPE_WORM
) {
81 cd
->vendor
= VENDOR_WRITER
;
83 } else if (!strncmp(vendor
, "NEC", 3)) {
84 cd
->vendor
= VENDOR_NEC
;
85 if (!strncmp(model
, "CD-ROM DRIVE:25", 15) ||
86 !strncmp(model
, "CD-ROM DRIVE:36", 15) ||
87 !strncmp(model
, "CD-ROM DRIVE:83", 15) ||
88 !strncmp(model
, "CD-ROM DRIVE:84 ", 16)
90 /* my NEC 3x returns the read-raw data if a read-raw
91 is followed by a read for the same sector - aeb */
92 || !strncmp(model
, "CD-ROM DRIVE:500", 16)
95 /* these can't handle multisession, may hang */
96 cd
->cdi
.mask
|= CDC_MULTI_SESSION
;
98 } else if (!strncmp(vendor
, "TOSHIBA", 7)) {
99 cd
->vendor
= VENDOR_TOSHIBA
;
106 /* small handy function for switching block length using MODE SELECT,
107 * used by sr_read_sector() */
109 int sr_set_blocklength(Scsi_CD
*cd
, int blocklength
)
111 unsigned char *buffer
; /* the buffer for the ioctl */
112 struct packet_command cgc
;
113 struct ccs_modesel_head
*modesel
;
116 #ifdef CONFIG_BLK_DEV_SR_VENDOR
117 if (cd
->vendor
== VENDOR_TOSHIBA
)
118 density
= (blocklength
> 2048) ? 0x81 : 0x83;
121 buffer
= (unsigned char *) kmalloc(512, GFP_KERNEL
| GFP_DMA
);
126 printk("%s: MODE SELECT 0x%x/%d\n", cd
->cdi
.name
, density
, blocklength
);
128 memset(&cgc
, 0, sizeof(struct packet_command
));
129 cgc
.cmd
[0] = MODE_SELECT
;
130 cgc
.cmd
[1] = (1 << 4);
132 modesel
= (struct ccs_modesel_head
*) buffer
;
133 memset(modesel
, 0, sizeof(*modesel
));
134 modesel
->block_desc_length
= 0x08;
135 modesel
->density
= density
;
136 modesel
->block_length_med
= (blocklength
>> 8) & 0xff;
137 modesel
->block_length_lo
= blocklength
& 0xff;
139 cgc
.buflen
= sizeof(*modesel
);
140 cgc
.data_direction
= DMA_TO_DEVICE
;
141 cgc
.timeout
= VENDOR_TIMEOUT
;
142 if (0 == (rc
= sr_do_ioctl(cd
, &cgc
))) {
143 cd
->device
->sector_size
= blocklength
;
147 printk("%s: switching blocklength to %d bytes failed\n",
148 cd
->cdi
.name
, blocklength
);
154 /* This function gets called after a media change. Checks if the CD is
155 multisession, asks for offset etc. */
157 int sr_cd_check(struct cdrom_device_info
*cdi
)
159 Scsi_CD
*cd
= cdi
->handle
;
160 unsigned long sector
;
161 unsigned char *buffer
; /* the buffer for the ioctl */
162 struct packet_command cgc
;
165 if (cd
->cdi
.mask
& CDC_MULTI_SESSION
)
168 buffer
= (unsigned char *) kmalloc(512, GFP_KERNEL
| GFP_DMA
);
172 sector
= 0; /* the multisession sector offset goes here */
173 no_multi
= 0; /* flag: the drive can't handle multisession */
176 memset(&cgc
, 0, sizeof(struct packet_command
));
178 switch (cd
->vendor
) {
181 cgc
.cmd
[0] = READ_TOC
;
187 cgc
.data_direction
= DMA_FROM_DEVICE
;
188 cgc
.timeout
= VENDOR_TIMEOUT
;
189 rc
= sr_do_ioctl(cd
, &cgc
);
192 if ((buffer
[0] << 8) + buffer
[1] < 0x0a) {
193 printk(KERN_INFO
"%s: Hmm, seems the drive "
194 "doesn't support multisession CD's\n", cd
->cdi
.name
);
198 sector
= buffer
[11] + (buffer
[10] << 8) +
199 (buffer
[9] << 16) + (buffer
[8] << 24);
200 if (buffer
[6] <= 1) {
201 /* ignore sector offsets from first track */
206 #ifdef CONFIG_BLK_DEV_SR_VENDOR
208 unsigned long min
, sec
, frame
;
215 cgc
.data_direction
= DMA_FROM_DEVICE
;
216 cgc
.timeout
= VENDOR_TIMEOUT
;
217 rc
= sr_do_ioctl(cd
, &cgc
);
220 if (buffer
[14] != 0 && buffer
[14] != 0xb0) {
221 printk(KERN_INFO
"%s: Hmm, seems the cdrom "
222 "doesn't support multisession CD's\n",
227 min
= BCD2BIN(buffer
[15]);
228 sec
= BCD2BIN(buffer
[16]);
229 frame
= BCD2BIN(buffer
[17]);
230 sector
= min
* CD_SECS
* CD_FRAMES
+ sec
* CD_FRAMES
+ frame
;
234 case VENDOR_TOSHIBA
:{
235 unsigned long min
, sec
, frame
;
237 /* we request some disc information (is it a XA-CD ?,
238 * where starts the last session ?) */
244 cgc
.data_direction
= DMA_FROM_DEVICE
;
245 cgc
.timeout
= VENDOR_TIMEOUT
;
246 rc
= sr_do_ioctl(cd
, &cgc
);
248 printk(KERN_INFO
"%s: Hmm, seems the drive "
249 "doesn't support multisession CD's\n",
256 min
= BCD2BIN(buffer
[1]);
257 sec
= BCD2BIN(buffer
[2]);
258 frame
= BCD2BIN(buffer
[3]);
259 sector
= min
* CD_SECS
* CD_FRAMES
+ sec
* CD_FRAMES
+ frame
;
261 sector
-= CD_MSF_OFFSET
;
262 sr_set_blocklength(cd
, 2048);
267 cgc
.cmd
[0] = READ_TOC
;
273 cgc
.data_direction
= DMA_FROM_DEVICE
;
274 cgc
.timeout
= VENDOR_TIMEOUT
;
275 rc
= sr_do_ioctl(cd
, &cgc
);
279 if ((rc
= buffer
[2]) == 0) {
281 "%s: No finished session\n", cd
->cdi
.name
);
284 cgc
.cmd
[0] = READ_TOC
; /* Read TOC */
285 cgc
.cmd
[6] = rc
& 0x7f; /* number of last session */
291 cgc
.data_direction
= DMA_FROM_DEVICE
;
292 cgc
.timeout
= VENDOR_TIMEOUT
;
293 rc
= sr_do_ioctl(cd
, &cgc
);
297 sector
= buffer
[11] + (buffer
[10] << 8) +
298 (buffer
[9] << 16) + (buffer
[8] << 24);
300 #endif /* CONFIG_BLK_DEV_SR_VENDOR */
303 /* should not happen */
305 "%s: unknown vendor code (%i), not initialized ?\n",
306 cd
->cdi
.name
, cd
->vendor
);
311 cd
->ms_offset
= sector
;
313 if (CDS_AUDIO
!= sr_disk_status(cdi
) && 1 == sr_is_xa(cd
))
316 if (2048 != cd
->device
->sector_size
) {
317 sr_set_blocklength(cd
, 2048);
320 cdi
->mask
|= CDC_MULTI_SESSION
;
324 printk(KERN_DEBUG
"%s: multisession offset=%lu\n",
325 cd
->cdi
.name
, sector
);