1 #include <linux/kernel.h>
2 #include <linux/sched.h>
5 #include <linux/errno.h>
6 #include <linux/string.h>
7 #include <linux/blkdev.h>
8 #include <linux/blkpg.h>
9 #include <linux/cdrom.h>
10 #include <linux/delay.h>
12 #include <asm/uaccess.h>
14 #include <scsi/scsi.h>
15 #include <scsi/scsi_dbg.h>
16 #include <scsi/scsi_device.h>
17 #include <scsi/scsi_eh.h>
18 #include <scsi/scsi_host.h>
19 #include <scsi/scsi_ioctl.h>
20 #include <scsi/scsi_request.h>
28 /* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
29 * It is off by default and can be turned on with this module parameter */
30 static int xa_test
= 0;
32 module_param(xa_test
, int, S_IRUGO
| S_IWUSR
);
35 #define IOCTL_RETRIES 3
37 /* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives
38 are emulating a SCSI device via the idescsi module, they need to have
39 CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
41 static int sr_fake_playtrkind(struct cdrom_device_info
*cdi
, struct cdrom_ti
*ti
)
43 struct cdrom_tocentry trk0_te
, trk1_te
;
44 struct cdrom_tochdr tochdr
;
45 struct packet_command cgc
;
48 if ((ret
= sr_audio_ioctl(cdi
, CDROMREADTOCHDR
, &tochdr
)))
51 ntracks
= tochdr
.cdth_trk1
- tochdr
.cdth_trk0
+ 1;
53 if (ti
->cdti_trk1
== ntracks
)
54 ti
->cdti_trk1
= CDROM_LEADOUT
;
55 else if (ti
->cdti_trk1
!= CDROM_LEADOUT
)
58 trk0_te
.cdte_track
= ti
->cdti_trk0
;
59 trk0_te
.cdte_format
= CDROM_MSF
;
60 trk1_te
.cdte_track
= ti
->cdti_trk1
;
61 trk1_te
.cdte_format
= CDROM_MSF
;
63 if ((ret
= sr_audio_ioctl(cdi
, CDROMREADTOCENTRY
, &trk0_te
)))
65 if ((ret
= sr_audio_ioctl(cdi
, CDROMREADTOCENTRY
, &trk1_te
)))
68 memset(&cgc
, 0, sizeof(struct packet_command
));
69 cgc
.cmd
[0] = GPCMD_PLAY_AUDIO_MSF
;
70 cgc
.cmd
[3] = trk0_te
.cdte_addr
.msf
.minute
;
71 cgc
.cmd
[4] = trk0_te
.cdte_addr
.msf
.second
;
72 cgc
.cmd
[5] = trk0_te
.cdte_addr
.msf
.frame
;
73 cgc
.cmd
[6] = trk1_te
.cdte_addr
.msf
.minute
;
74 cgc
.cmd
[7] = trk1_te
.cdte_addr
.msf
.second
;
75 cgc
.cmd
[8] = trk1_te
.cdte_addr
.msf
.frame
;
76 cgc
.data_direction
= DMA_NONE
;
77 cgc
.timeout
= IOCTL_TIMEOUT
;
78 return sr_do_ioctl(cdi
->handle
, &cgc
);
81 /* We do our own retries because we want to know what the specific
82 error code is. Normally the UNIT_ATTENTION code will automatically
83 clear after one error */
85 int sr_do_ioctl(Scsi_CD
*cd
, struct packet_command
*cgc
)
87 struct scsi_request
*SRpnt
;
88 struct scsi_device
*SDev
;
90 int result
, err
= 0, retries
= 0;
93 SRpnt
= scsi_allocate_request(SDev
, GFP_KERNEL
);
95 printk(KERN_ERR
"Unable to allocate SCSI request in sr_do_ioctl");
99 SRpnt
->sr_data_direction
= cgc
->data_direction
;
102 if (!scsi_block_when_processing_errors(SDev
)) {
107 scsi_wait_req(SRpnt
, cgc
->cmd
, cgc
->buffer
, cgc
->buflen
,
108 cgc
->timeout
, IOCTL_RETRIES
);
110 req
= SRpnt
->sr_request
;
111 if (SRpnt
->sr_buffer
&& req
->buffer
&& SRpnt
->sr_buffer
!= req
->buffer
) {
112 memcpy(req
->buffer
, SRpnt
->sr_buffer
, SRpnt
->sr_bufflen
);
113 kfree(SRpnt
->sr_buffer
);
114 SRpnt
->sr_buffer
= req
->buffer
;
117 result
= SRpnt
->sr_result
;
119 /* Minimal error checking. Ignore cases we know about, and report the rest. */
120 if (driver_byte(result
) != 0) {
121 switch (SRpnt
->sr_sense_buffer
[2] & 0xf) {
125 printk(KERN_INFO
"%s: disc change detected.\n", cd
->cdi
.name
);
130 case NOT_READY
: /* This happens if there is no disc in drive */
131 if (SRpnt
->sr_sense_buffer
[12] == 0x04 &&
132 SRpnt
->sr_sense_buffer
[13] == 0x01) {
133 /* sense: Logical unit is in process of becoming ready */
135 printk(KERN_INFO
"%s: CDROM not ready yet.\n", cd
->cdi
.name
);
136 if (retries
++ < 10) {
137 /* sleep 2 sec and try again */
141 /* 20 secs are enough? */
147 printk(KERN_INFO
"%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd
->cdi
.name
);
149 scsi_print_req_sense("sr", SRpnt
);
153 case ILLEGAL_REQUEST
:
155 if (SRpnt
->sr_sense_buffer
[12] == 0x20 &&
156 SRpnt
->sr_sense_buffer
[13] == 0x00)
157 /* sense: Invalid command operation code */
158 err
= -EDRIVE_CANT_DO_THIS
;
160 __scsi_print_command(cgc
->cmd
);
161 scsi_print_req_sense("sr", SRpnt
);
165 printk(KERN_ERR
"%s: CDROM (ioctl) error, command: ", cd
->cdi
.name
);
166 __scsi_print_command(cgc
->cmd
);
167 scsi_print_req_sense("sr", SRpnt
);
173 memcpy(cgc
->sense
, SRpnt
->sr_sense_buffer
, sizeof(*cgc
->sense
));
175 /* Wake up a process waiting for device */
177 scsi_release_request(SRpnt
);
184 /* ---------------------------------------------------------------------- */
185 /* interface to cdrom.c */
187 static int test_unit_ready(Scsi_CD
*cd
)
189 struct packet_command cgc
;
191 memset(&cgc
, 0, sizeof(struct packet_command
));
192 cgc
.cmd
[0] = GPCMD_TEST_UNIT_READY
;
194 cgc
.data_direction
= DMA_NONE
;
195 cgc
.timeout
= IOCTL_TIMEOUT
;
196 return sr_do_ioctl(cd
, &cgc
);
199 int sr_tray_move(struct cdrom_device_info
*cdi
, int pos
)
201 Scsi_CD
*cd
= cdi
->handle
;
202 struct packet_command cgc
;
204 memset(&cgc
, 0, sizeof(struct packet_command
));
205 cgc
.cmd
[0] = GPCMD_START_STOP_UNIT
;
206 cgc
.cmd
[4] = (pos
== 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
207 cgc
.data_direction
= DMA_NONE
;
208 cgc
.timeout
= IOCTL_TIMEOUT
;
209 return sr_do_ioctl(cd
, &cgc
);
212 int sr_lock_door(struct cdrom_device_info
*cdi
, int lock
)
214 Scsi_CD
*cd
= cdi
->handle
;
216 return scsi_set_medium_removal(cd
->device
, lock
?
217 SCSI_REMOVAL_PREVENT
: SCSI_REMOVAL_ALLOW
);
220 int sr_drive_status(struct cdrom_device_info
*cdi
, int slot
)
222 if (CDSL_CURRENT
!= slot
) {
223 /* we have no changer support */
226 if (0 == test_unit_ready(cdi
->handle
))
229 return CDS_TRAY_OPEN
;
232 int sr_disk_status(struct cdrom_device_info
*cdi
)
234 Scsi_CD
*cd
= cdi
->handle
;
235 struct cdrom_tochdr toc_h
;
236 struct cdrom_tocentry toc_e
;
237 int i
, rc
, have_datatracks
= 0;
239 /* look for data tracks */
240 if (0 != (rc
= sr_audio_ioctl(cdi
, CDROMREADTOCHDR
, &toc_h
)))
241 return (rc
== -ENOMEDIUM
) ? CDS_NO_DISC
: CDS_NO_INFO
;
243 for (i
= toc_h
.cdth_trk0
; i
<= toc_h
.cdth_trk1
; i
++) {
244 toc_e
.cdte_track
= i
;
245 toc_e
.cdte_format
= CDROM_LBA
;
246 if (sr_audio_ioctl(cdi
, CDROMREADTOCENTRY
, &toc_e
))
248 if (toc_e
.cdte_ctrl
& CDROM_DATA_TRACK
) {
253 if (!have_datatracks
)
262 int sr_get_last_session(struct cdrom_device_info
*cdi
,
263 struct cdrom_multisession
*ms_info
)
265 Scsi_CD
*cd
= cdi
->handle
;
267 ms_info
->addr
.lba
= cd
->ms_offset
;
268 ms_info
->xa_flag
= cd
->xa_flag
|| cd
->ms_offset
> 0;
273 /* primitive to determine whether we need to have GFP_DMA set based on
274 * the status of the unchecked_isa_dma flag in the host structure */
275 #define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
277 int sr_get_mcn(struct cdrom_device_info
*cdi
, struct cdrom_mcn
*mcn
)
279 Scsi_CD
*cd
= cdi
->handle
;
280 struct packet_command cgc
;
281 char *buffer
= kmalloc(32, GFP_KERNEL
| SR_GFP_DMA(cd
));
284 memset(&cgc
, 0, sizeof(struct packet_command
));
285 cgc
.cmd
[0] = GPCMD_READ_SUBCHANNEL
;
286 cgc
.cmd
[2] = 0x40; /* I do want the subchannel info */
287 cgc
.cmd
[3] = 0x02; /* Give me medium catalog number info */
291 cgc
.data_direction
= DMA_FROM_DEVICE
;
292 cgc
.timeout
= IOCTL_TIMEOUT
;
293 result
= sr_do_ioctl(cd
, &cgc
);
295 memcpy(mcn
->medium_catalog_number
, buffer
+ 9, 13);
296 mcn
->medium_catalog_number
[13] = 0;
302 int sr_reset(struct cdrom_device_info
*cdi
)
307 int sr_select_speed(struct cdrom_device_info
*cdi
, int speed
)
309 Scsi_CD
*cd
= cdi
->handle
;
310 struct packet_command cgc
;
313 speed
= 0xffff; /* set to max */
315 speed
*= 177; /* Nx to kbyte/s */
317 memset(&cgc
, 0, sizeof(struct packet_command
));
318 cgc
.cmd
[0] = GPCMD_SET_SPEED
; /* SET CD SPEED */
319 cgc
.cmd
[2] = (speed
>> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
320 cgc
.cmd
[3] = speed
& 0xff; /* LSB */
321 cgc
.data_direction
= DMA_NONE
;
322 cgc
.timeout
= IOCTL_TIMEOUT
;
324 if (sr_do_ioctl(cd
, &cgc
))
329 /* ----------------------------------------------------------------------- */
330 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
331 /* because the generic cdrom driver does the user access stuff for us. */
332 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
333 /* sr_disk_status interface for the generic cdrom driver. */
335 int sr_audio_ioctl(struct cdrom_device_info
*cdi
, unsigned int cmd
, void *arg
)
337 Scsi_CD
*cd
= cdi
->handle
;
338 struct packet_command cgc
;
340 unsigned char *buffer
= kmalloc(32, GFP_KERNEL
| SR_GFP_DMA(cd
));
345 memset(&cgc
, 0, sizeof(struct packet_command
));
346 cgc
.timeout
= IOCTL_TIMEOUT
;
349 case CDROMREADTOCHDR
:
351 struct cdrom_tochdr
*tochdr
= (struct cdrom_tochdr
*) arg
;
353 cgc
.cmd
[0] = GPCMD_READ_TOC_PMA_ATIP
;
354 cgc
.cmd
[8] = 12; /* LSB of length */
358 cgc
.data_direction
= DMA_FROM_DEVICE
;
360 result
= sr_do_ioctl(cd
, &cgc
);
362 tochdr
->cdth_trk0
= buffer
[2];
363 tochdr
->cdth_trk1
= buffer
[3];
368 case CDROMREADTOCENTRY
:
370 struct cdrom_tocentry
*tocentry
= (struct cdrom_tocentry
*) arg
;
372 cgc
.cmd
[0] = GPCMD_READ_TOC_PMA_ATIP
;
373 cgc
.cmd
[1] |= (tocentry
->cdte_format
== CDROM_MSF
) ? 0x02 : 0;
374 cgc
.cmd
[6] = tocentry
->cdte_track
;
375 cgc
.cmd
[8] = 12; /* LSB of length */
378 cgc
.data_direction
= DMA_FROM_DEVICE
;
380 result
= sr_do_ioctl(cd
, &cgc
);
382 tocentry
->cdte_ctrl
= buffer
[5] & 0xf;
383 tocentry
->cdte_adr
= buffer
[5] >> 4;
384 tocentry
->cdte_datamode
= (tocentry
->cdte_ctrl
& 0x04) ? 1 : 0;
385 if (tocentry
->cdte_format
== CDROM_MSF
) {
386 tocentry
->cdte_addr
.msf
.minute
= buffer
[9];
387 tocentry
->cdte_addr
.msf
.second
= buffer
[10];
388 tocentry
->cdte_addr
.msf
.frame
= buffer
[11];
390 tocentry
->cdte_addr
.lba
= (((((buffer
[8] << 8) + buffer
[9]) << 8)
391 + buffer
[10]) << 8) + buffer
[11];
396 case CDROMPLAYTRKIND
: {
397 struct cdrom_ti
* ti
= (struct cdrom_ti
*)arg
;
399 cgc
.cmd
[0] = GPCMD_PLAYAUDIO_TI
;
400 cgc
.cmd
[4] = ti
->cdti_trk0
;
401 cgc
.cmd
[5] = ti
->cdti_ind0
;
402 cgc
.cmd
[7] = ti
->cdti_trk1
;
403 cgc
.cmd
[8] = ti
->cdti_ind1
;
404 cgc
.data_direction
= DMA_NONE
;
406 result
= sr_do_ioctl(cd
, &cgc
);
407 if (result
== -EDRIVE_CANT_DO_THIS
)
408 result
= sr_fake_playtrkind(cdi
, ti
);
419 printk("DEBUG: sr_audio: result for ioctl %x: %x\n", cmd
, result
);
426 /* -----------------------------------------------------------------------
427 * a function to read all sorts of funny cdrom sectors using the READ_CD
430 * lba: linear block address
431 * format: 0 = data (anything)
435 * 4 = data (mode 2 form1)
436 * 5 = data (mode 2 form2)
437 * blksize: 2048 | 2336 | 2340 | 2352
440 static int sr_read_cd(Scsi_CD
*cd
, unsigned char *dest
, int lba
, int format
, int blksize
)
442 struct packet_command cgc
;
445 printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
446 cd
->cdi
.name
, lba
, format
, blksize
);
449 memset(&cgc
, 0, sizeof(struct packet_command
));
450 cgc
.cmd
[0] = GPCMD_READ_CD
; /* READ_CD */
451 cgc
.cmd
[1] = ((format
& 7) << 2);
452 cgc
.cmd
[2] = (unsigned char) (lba
>> 24) & 0xff;
453 cgc
.cmd
[3] = (unsigned char) (lba
>> 16) & 0xff;
454 cgc
.cmd
[4] = (unsigned char) (lba
>> 8) & 0xff;
455 cgc
.cmd
[5] = (unsigned char) lba
& 0xff;
472 cgc
.buflen
= blksize
;
473 cgc
.data_direction
= DMA_FROM_DEVICE
;
474 cgc
.timeout
= IOCTL_TIMEOUT
;
475 return sr_do_ioctl(cd
, &cgc
);
479 * read sectors with blocksizes other than 2048
482 static int sr_read_sector(Scsi_CD
*cd
, int lba
, int blksize
, unsigned char *dest
)
484 struct packet_command cgc
;
487 /* we try the READ CD command first... */
488 if (cd
->readcd_known
) {
489 rc
= sr_read_cd(cd
, dest
, lba
, 0, blksize
);
490 if (-EDRIVE_CANT_DO_THIS
!= rc
)
492 cd
->readcd_known
= 0;
493 printk("CDROM does'nt support READ CD (0xbe) command\n");
494 /* fall & retry the other way */
496 /* ... if this fails, we switch the blocksize using MODE SELECT */
497 if (blksize
!= cd
->device
->sector_size
) {
498 if (0 != (rc
= sr_set_blocklength(cd
, blksize
)))
502 printk("%s: sr_read_sector lba=%d blksize=%d\n", cd
->cdi
.name
, lba
, blksize
);
505 memset(&cgc
, 0, sizeof(struct packet_command
));
506 cgc
.cmd
[0] = GPCMD_READ_10
;
507 cgc
.cmd
[2] = (unsigned char) (lba
>> 24) & 0xff;
508 cgc
.cmd
[3] = (unsigned char) (lba
>> 16) & 0xff;
509 cgc
.cmd
[4] = (unsigned char) (lba
>> 8) & 0xff;
510 cgc
.cmd
[5] = (unsigned char) lba
& 0xff;
513 cgc
.buflen
= blksize
;
514 cgc
.data_direction
= DMA_FROM_DEVICE
;
515 cgc
.timeout
= IOCTL_TIMEOUT
;
516 rc
= sr_do_ioctl(cd
, &cgc
);
522 * read a sector in raw mode to check the sector format
523 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error
526 int sr_is_xa(Scsi_CD
*cd
)
528 unsigned char *raw_sector
;
534 raw_sector
= (unsigned char *) kmalloc(2048, GFP_KERNEL
| SR_GFP_DMA(cd
));
537 if (0 == sr_read_sector(cd
, cd
->ms_offset
+ 16,
538 CD_FRAMESIZE_RAW1
, raw_sector
)) {
539 is_xa
= (raw_sector
[3] == 0x02) ? 1 : 0;
541 /* read a raw sector failed for some reason. */
546 printk("%s: sr_is_xa: %d\n", cd
->cdi
.name
, is_xa
);
551 int sr_dev_ioctl(struct cdrom_device_info
*cdi
,
552 unsigned int cmd
, unsigned long arg
)
554 Scsi_CD
*cd
= cdi
->handle
;
557 ret
= scsi_nonblockable_ioctl(cd
->device
, cmd
,
558 (void __user
*)arg
, NULL
);
560 * ENODEV means that we didn't recognise the ioctl, or that we
561 * cannot execute it in the current device state. In either
562 * case fall through to scsi_ioctl, which will return ENDOEV again
563 * if it doesn't recognise the ioctl
567 return scsi_ioctl(cd
->device
, cmd
, (void __user
*)arg
);