Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0
2 : #include <linux/kernel.h>
3 : #include <linux/mm.h>
4 : #include <linux/fs.h>
5 : #include <linux/errno.h>
6 : #include <linux/string.h>
7 : #include <linux/blkdev.h>
8 : #include <linux/module.h>
9 : #include <linux/blkpg.h>
10 : #include <linux/cdrom.h>
11 : #include <linux/delay.h>
12 : #include <linux/slab.h>
13 : #include <asm/io.h>
14 : #include <linux/uaccess.h>
15 :
16 : #include <scsi/scsi.h>
17 : #include <scsi/scsi_dbg.h>
18 : #include <scsi/scsi_device.h>
19 : #include <scsi/scsi_eh.h>
20 : #include <scsi/scsi_host.h>
21 : #include <scsi/scsi_ioctl.h>
22 : #include <scsi/scsi_cmnd.h>
23 :
24 : #include "sr.h"
25 :
26 : #if 0
27 : #define DEBUG
28 : #endif
29 :
30 : /* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
31 : * It is off by default and can be turned on with this module parameter */
32 : static int xa_test = 0;
33 :
34 : module_param(xa_test, int, S_IRUGO | S_IWUSR);
35 :
36 : /* primitive to determine whether we need to have GFP_DMA set based on
37 : * the status of the unchecked_isa_dma flag in the host structure */
38 : #define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
39 :
40 0 : static int sr_read_tochdr(struct cdrom_device_info *cdi,
41 : struct cdrom_tochdr *tochdr)
42 : {
43 0 : struct scsi_cd *cd = cdi->handle;
44 0 : struct packet_command cgc;
45 0 : int result;
46 0 : unsigned char *buffer;
47 :
48 0 : buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
49 0 : if (!buffer)
50 : return -ENOMEM;
51 :
52 0 : memset(&cgc, 0, sizeof(struct packet_command));
53 0 : cgc.timeout = IOCTL_TIMEOUT;
54 0 : cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
55 0 : cgc.cmd[8] = 12; /* LSB of length */
56 0 : cgc.buffer = buffer;
57 0 : cgc.buflen = 12;
58 0 : cgc.quiet = 1;
59 0 : cgc.data_direction = DMA_FROM_DEVICE;
60 :
61 0 : result = sr_do_ioctl(cd, &cgc);
62 :
63 0 : tochdr->cdth_trk0 = buffer[2];
64 0 : tochdr->cdth_trk1 = buffer[3];
65 :
66 0 : kfree(buffer);
67 0 : return result;
68 : }
69 :
70 0 : static int sr_read_tocentry(struct cdrom_device_info *cdi,
71 : struct cdrom_tocentry *tocentry)
72 : {
73 0 : struct scsi_cd *cd = cdi->handle;
74 0 : struct packet_command cgc;
75 0 : int result;
76 0 : unsigned char *buffer;
77 :
78 0 : buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
79 0 : if (!buffer)
80 : return -ENOMEM;
81 :
82 0 : memset(&cgc, 0, sizeof(struct packet_command));
83 0 : cgc.timeout = IOCTL_TIMEOUT;
84 0 : cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
85 0 : cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
86 0 : cgc.cmd[6] = tocentry->cdte_track;
87 0 : cgc.cmd[8] = 12; /* LSB of length */
88 0 : cgc.buffer = buffer;
89 0 : cgc.buflen = 12;
90 0 : cgc.data_direction = DMA_FROM_DEVICE;
91 :
92 0 : result = sr_do_ioctl(cd, &cgc);
93 :
94 0 : tocentry->cdte_ctrl = buffer[5] & 0xf;
95 0 : tocentry->cdte_adr = buffer[5] >> 4;
96 0 : tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
97 0 : if (tocentry->cdte_format == CDROM_MSF) {
98 0 : tocentry->cdte_addr.msf.minute = buffer[9];
99 0 : tocentry->cdte_addr.msf.second = buffer[10];
100 0 : tocentry->cdte_addr.msf.frame = buffer[11];
101 : } else
102 0 : tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
103 0 : + buffer[10]) << 8) + buffer[11];
104 :
105 0 : kfree(buffer);
106 0 : return result;
107 : }
108 :
109 : #define IOCTL_RETRIES 3
110 :
111 : /* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives
112 : are emulating a SCSI device via the idescsi module, they need to have
113 : CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
114 :
115 0 : static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
116 : {
117 0 : struct cdrom_tocentry trk0_te, trk1_te;
118 0 : struct cdrom_tochdr tochdr;
119 0 : struct packet_command cgc;
120 0 : int ntracks, ret;
121 :
122 0 : ret = sr_read_tochdr(cdi, &tochdr);
123 0 : if (ret)
124 : return ret;
125 :
126 0 : ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
127 :
128 0 : if (ti->cdti_trk1 == ntracks)
129 0 : ti->cdti_trk1 = CDROM_LEADOUT;
130 0 : else if (ti->cdti_trk1 != CDROM_LEADOUT)
131 0 : ti->cdti_trk1 ++;
132 :
133 0 : trk0_te.cdte_track = ti->cdti_trk0;
134 0 : trk0_te.cdte_format = CDROM_MSF;
135 0 : trk1_te.cdte_track = ti->cdti_trk1;
136 0 : trk1_te.cdte_format = CDROM_MSF;
137 :
138 0 : ret = sr_read_tocentry(cdi, &trk0_te);
139 0 : if (ret)
140 : return ret;
141 0 : ret = sr_read_tocentry(cdi, &trk1_te);
142 0 : if (ret)
143 : return ret;
144 :
145 0 : memset(&cgc, 0, sizeof(struct packet_command));
146 0 : cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
147 0 : cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
148 0 : cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
149 0 : cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
150 0 : cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
151 0 : cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
152 0 : cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
153 0 : cgc.data_direction = DMA_NONE;
154 0 : cgc.timeout = IOCTL_TIMEOUT;
155 0 : return sr_do_ioctl(cdi->handle, &cgc);
156 : }
157 :
158 0 : static int sr_play_trkind(struct cdrom_device_info *cdi,
159 : struct cdrom_ti *ti)
160 :
161 : {
162 0 : struct scsi_cd *cd = cdi->handle;
163 0 : struct packet_command cgc;
164 0 : int result;
165 :
166 0 : memset(&cgc, 0, sizeof(struct packet_command));
167 0 : cgc.timeout = IOCTL_TIMEOUT;
168 0 : cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
169 0 : cgc.cmd[4] = ti->cdti_trk0;
170 0 : cgc.cmd[5] = ti->cdti_ind0;
171 0 : cgc.cmd[7] = ti->cdti_trk1;
172 0 : cgc.cmd[8] = ti->cdti_ind1;
173 0 : cgc.data_direction = DMA_NONE;
174 :
175 0 : result = sr_do_ioctl(cd, &cgc);
176 0 : if (result == -EDRIVE_CANT_DO_THIS)
177 0 : result = sr_fake_playtrkind(cdi, ti);
178 :
179 0 : return result;
180 : }
181 :
182 : /* We do our own retries because we want to know what the specific
183 : error code is. Normally the UNIT_ATTENTION code will automatically
184 : clear after one error */
185 :
186 0 : int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
187 : {
188 0 : struct scsi_device *SDev;
189 0 : struct scsi_sense_hdr local_sshdr, *sshdr = &local_sshdr;
190 0 : int result, err = 0, retries = 0;
191 :
192 0 : SDev = cd->device;
193 :
194 0 : if (cgc->sshdr)
195 0 : sshdr = cgc->sshdr;
196 :
197 0 : retry:
198 0 : if (!scsi_block_when_processing_errors(SDev)) {
199 0 : err = -ENODEV;
200 0 : goto out;
201 : }
202 :
203 0 : result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
204 : cgc->buffer, cgc->buflen, NULL, sshdr,
205 : cgc->timeout, IOCTL_RETRIES, 0, 0, NULL);
206 :
207 : /* Minimal error checking. Ignore cases we know about, and report the rest. */
208 0 : if (driver_byte(result) != 0) {
209 0 : switch (sshdr->sense_key) {
210 0 : case UNIT_ATTENTION:
211 0 : SDev->changed = 1;
212 0 : if (!cgc->quiet)
213 0 : sr_printk(KERN_INFO, cd,
214 : "disc change detected.\n");
215 0 : if (retries++ < 10)
216 0 : goto retry;
217 : err = -ENOMEDIUM;
218 : break;
219 0 : case NOT_READY: /* This happens if there is no disc in drive */
220 0 : if (sshdr->asc == 0x04 &&
221 0 : sshdr->ascq == 0x01) {
222 : /* sense: Logical unit is in process of becoming ready */
223 0 : if (!cgc->quiet)
224 0 : sr_printk(KERN_INFO, cd,
225 : "CDROM not ready yet.\n");
226 0 : if (retries++ < 10) {
227 : /* sleep 2 sec and try again */
228 0 : ssleep(2);
229 0 : goto retry;
230 : } else {
231 : /* 20 secs are enough? */
232 : err = -ENOMEDIUM;
233 : break;
234 : }
235 : }
236 0 : if (!cgc->quiet)
237 0 : sr_printk(KERN_INFO, cd,
238 : "CDROM not ready. Make sure there "
239 : "is a disc in the drive.\n");
240 : err = -ENOMEDIUM;
241 : break;
242 0 : case ILLEGAL_REQUEST:
243 0 : err = -EIO;
244 0 : if (sshdr->asc == 0x20 &&
245 0 : sshdr->ascq == 0x00)
246 : /* sense: Invalid command operation code */
247 0 : err = -EDRIVE_CANT_DO_THIS;
248 : break;
249 : default:
250 : err = -EIO;
251 : }
252 : }
253 :
254 : /* Wake up a process waiting for device */
255 0 : out:
256 0 : cgc->stat = err;
257 0 : return err;
258 : }
259 :
260 : /* ---------------------------------------------------------------------- */
261 : /* interface to cdrom.c */
262 :
263 0 : int sr_tray_move(struct cdrom_device_info *cdi, int pos)
264 : {
265 0 : Scsi_CD *cd = cdi->handle;
266 0 : struct packet_command cgc;
267 :
268 0 : memset(&cgc, 0, sizeof(struct packet_command));
269 0 : cgc.cmd[0] = GPCMD_START_STOP_UNIT;
270 0 : cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
271 0 : cgc.data_direction = DMA_NONE;
272 0 : cgc.timeout = IOCTL_TIMEOUT;
273 0 : return sr_do_ioctl(cd, &cgc);
274 : }
275 :
276 0 : int sr_lock_door(struct cdrom_device_info *cdi, int lock)
277 : {
278 0 : Scsi_CD *cd = cdi->handle;
279 :
280 0 : return scsi_set_medium_removal(cd->device, lock ?
281 : SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
282 : }
283 :
284 0 : int sr_drive_status(struct cdrom_device_info *cdi, int slot)
285 : {
286 0 : struct scsi_cd *cd = cdi->handle;
287 0 : struct scsi_sense_hdr sshdr;
288 0 : struct media_event_desc med;
289 :
290 0 : if (CDSL_CURRENT != slot) {
291 : /* we have no changer support */
292 : return -EINVAL;
293 : }
294 0 : if (!scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr))
295 : return CDS_DISC_OK;
296 :
297 : /* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */
298 0 : if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
299 0 : && sshdr.asc == 0x04 && sshdr.ascq == 0x01)
300 : return CDS_DRIVE_NOT_READY;
301 :
302 0 : if (!cdrom_get_media_event(cdi, &med)) {
303 0 : if (med.media_present)
304 : return CDS_DISC_OK;
305 0 : else if (med.door_open)
306 : return CDS_TRAY_OPEN;
307 : else
308 0 : return CDS_NO_DISC;
309 : }
310 :
311 : /*
312 : * SK/ASC/ASCQ of 2/4/2 means "initialization required"
313 : * Using CD_TRAY_OPEN results in an START_STOP_UNIT to close
314 : * the tray, which resolves the initialization requirement.
315 : */
316 0 : if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
317 0 : && sshdr.asc == 0x04 && sshdr.ascq == 0x02)
318 : return CDS_TRAY_OPEN;
319 :
320 : /*
321 : * 0x04 is format in progress .. but there must be a disc present!
322 : */
323 0 : if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04)
324 : return CDS_DISC_OK;
325 :
326 : /*
327 : * If not using Mt Fuji extended media tray reports,
328 : * just return TRAY_OPEN since ATAPI doesn't provide
329 : * any other way to detect this...
330 : */
331 0 : if (scsi_sense_valid(&sshdr) &&
332 : /* 0x3a is medium not present */
333 0 : sshdr.asc == 0x3a)
334 : return CDS_NO_DISC;
335 : else
336 0 : return CDS_TRAY_OPEN;
337 :
338 : return CDS_DRIVE_NOT_READY;
339 : }
340 :
341 0 : int sr_disk_status(struct cdrom_device_info *cdi)
342 : {
343 0 : Scsi_CD *cd = cdi->handle;
344 0 : struct cdrom_tochdr toc_h;
345 0 : struct cdrom_tocentry toc_e;
346 0 : int i, rc, have_datatracks = 0;
347 :
348 : /* look for data tracks */
349 0 : rc = sr_read_tochdr(cdi, &toc_h);
350 0 : if (rc)
351 0 : return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
352 :
353 0 : for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
354 0 : toc_e.cdte_track = i;
355 0 : toc_e.cdte_format = CDROM_LBA;
356 0 : if (sr_read_tocentry(cdi, &toc_e))
357 : return CDS_NO_INFO;
358 0 : if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
359 : have_datatracks = 1;
360 : break;
361 : }
362 : }
363 0 : if (!have_datatracks)
364 : return CDS_AUDIO;
365 :
366 0 : if (cd->xa_flag)
367 : return CDS_XA_2_1;
368 : else
369 0 : return CDS_DATA_1;
370 : }
371 :
372 0 : int sr_get_last_session(struct cdrom_device_info *cdi,
373 : struct cdrom_multisession *ms_info)
374 : {
375 0 : Scsi_CD *cd = cdi->handle;
376 :
377 0 : ms_info->addr.lba = cd->ms_offset;
378 0 : ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;
379 :
380 0 : return 0;
381 : }
382 :
383 0 : int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
384 : {
385 0 : Scsi_CD *cd = cdi->handle;
386 0 : struct packet_command cgc;
387 0 : char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
388 0 : int result;
389 :
390 0 : if (!buffer)
391 : return -ENOMEM;
392 :
393 0 : memset(&cgc, 0, sizeof(struct packet_command));
394 0 : cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
395 0 : cgc.cmd[2] = 0x40; /* I do want the subchannel info */
396 0 : cgc.cmd[3] = 0x02; /* Give me medium catalog number info */
397 0 : cgc.cmd[8] = 24;
398 0 : cgc.buffer = buffer;
399 0 : cgc.buflen = 24;
400 0 : cgc.data_direction = DMA_FROM_DEVICE;
401 0 : cgc.timeout = IOCTL_TIMEOUT;
402 0 : result = sr_do_ioctl(cd, &cgc);
403 :
404 0 : memcpy(mcn->medium_catalog_number, buffer + 9, 13);
405 0 : mcn->medium_catalog_number[13] = 0;
406 :
407 0 : kfree(buffer);
408 0 : return result;
409 : }
410 :
411 0 : int sr_reset(struct cdrom_device_info *cdi)
412 : {
413 0 : return 0;
414 : }
415 :
416 0 : int sr_select_speed(struct cdrom_device_info *cdi, int speed)
417 : {
418 0 : Scsi_CD *cd = cdi->handle;
419 0 : struct packet_command cgc;
420 :
421 0 : if (speed == 0)
422 : speed = 0xffff; /* set to max */
423 : else
424 0 : speed *= 177; /* Nx to kbyte/s */
425 :
426 0 : memset(&cgc, 0, sizeof(struct packet_command));
427 0 : cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
428 0 : cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
429 0 : cgc.cmd[3] = speed & 0xff; /* LSB */
430 0 : cgc.data_direction = DMA_NONE;
431 0 : cgc.timeout = IOCTL_TIMEOUT;
432 :
433 0 : if (sr_do_ioctl(cd, &cgc))
434 0 : return -EIO;
435 : return 0;
436 : }
437 :
438 : /* ----------------------------------------------------------------------- */
439 : /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
440 : /* because the generic cdrom driver does the user access stuff for us. */
441 : /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
442 : /* sr_disk_status interface for the generic cdrom driver. */
443 :
444 0 : int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
445 : {
446 0 : switch (cmd) {
447 0 : case CDROMREADTOCHDR:
448 0 : return sr_read_tochdr(cdi, arg);
449 0 : case CDROMREADTOCENTRY:
450 0 : return sr_read_tocentry(cdi, arg);
451 0 : case CDROMPLAYTRKIND:
452 0 : return sr_play_trkind(cdi, arg);
453 : default:
454 : return -EINVAL;
455 : }
456 : }
457 :
458 : /* -----------------------------------------------------------------------
459 : * a function to read all sorts of funny cdrom sectors using the READ_CD
460 : * scsi-3 mmc command
461 : *
462 : * lba: linear block address
463 : * format: 0 = data (anything)
464 : * 1 = audio
465 : * 2 = data (mode 1)
466 : * 3 = data (mode 2)
467 : * 4 = data (mode 2 form1)
468 : * 5 = data (mode 2 form2)
469 : * blksize: 2048 | 2336 | 2340 | 2352
470 : */
471 :
472 0 : static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize)
473 : {
474 0 : struct packet_command cgc;
475 :
476 : #ifdef DEBUG
477 : sr_printk(KERN_INFO, cd, "sr_read_cd lba=%d format=%d blksize=%d\n",
478 : lba, format, blksize);
479 : #endif
480 :
481 0 : memset(&cgc, 0, sizeof(struct packet_command));
482 0 : cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
483 0 : cgc.cmd[1] = ((format & 7) << 2);
484 0 : cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
485 0 : cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
486 0 : cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
487 0 : cgc.cmd[5] = (unsigned char) lba & 0xff;
488 0 : cgc.cmd[8] = 1;
489 0 : switch (blksize) {
490 0 : case 2336:
491 0 : cgc.cmd[9] = 0x58;
492 0 : break;
493 0 : case 2340:
494 0 : cgc.cmd[9] = 0x78;
495 0 : break;
496 0 : case 2352:
497 0 : cgc.cmd[9] = 0xf8;
498 0 : break;
499 0 : default:
500 0 : cgc.cmd[9] = 0x10;
501 0 : break;
502 : }
503 0 : cgc.buffer = dest;
504 0 : cgc.buflen = blksize;
505 0 : cgc.data_direction = DMA_FROM_DEVICE;
506 0 : cgc.timeout = IOCTL_TIMEOUT;
507 0 : return sr_do_ioctl(cd, &cgc);
508 : }
509 :
510 : /*
511 : * read sectors with blocksizes other than 2048
512 : */
513 :
514 0 : static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
515 : {
516 0 : struct packet_command cgc;
517 0 : int rc;
518 :
519 : /* we try the READ CD command first... */
520 0 : if (cd->readcd_known) {
521 0 : rc = sr_read_cd(cd, dest, lba, 0, blksize);
522 0 : if (-EDRIVE_CANT_DO_THIS != rc)
523 : return rc;
524 0 : cd->readcd_known = 0;
525 0 : sr_printk(KERN_INFO, cd,
526 : "CDROM does'nt support READ CD (0xbe) command\n");
527 : /* fall & retry the other way */
528 : }
529 : /* ... if this fails, we switch the blocksize using MODE SELECT */
530 0 : if (blksize != cd->device->sector_size) {
531 0 : if (0 != (rc = sr_set_blocklength(cd, blksize)))
532 : return rc;
533 : }
534 : #ifdef DEBUG
535 : sr_printk(KERN_INFO, cd, "sr_read_sector lba=%d blksize=%d\n",
536 : lba, blksize);
537 : #endif
538 :
539 0 : memset(&cgc, 0, sizeof(struct packet_command));
540 0 : cgc.cmd[0] = GPCMD_READ_10;
541 0 : cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
542 0 : cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
543 0 : cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
544 0 : cgc.cmd[5] = (unsigned char) lba & 0xff;
545 0 : cgc.cmd[8] = 1;
546 0 : cgc.buffer = dest;
547 0 : cgc.buflen = blksize;
548 0 : cgc.data_direction = DMA_FROM_DEVICE;
549 0 : cgc.timeout = IOCTL_TIMEOUT;
550 0 : rc = sr_do_ioctl(cd, &cgc);
551 :
552 0 : if (blksize != CD_FRAMESIZE)
553 0 : rc |= sr_set_blocklength(cd, CD_FRAMESIZE);
554 : return rc;
555 : }
556 :
557 : /*
558 : * read a sector in raw mode to check the sector format
559 : * ret: 1 == mode2 (XA), 0 == mode1, <0 == error
560 : */
561 :
562 0 : int sr_is_xa(Scsi_CD *cd)
563 : {
564 0 : unsigned char *raw_sector;
565 0 : int is_xa;
566 :
567 0 : if (!xa_test)
568 : return 0;
569 :
570 0 : raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
571 0 : if (!raw_sector)
572 : return -ENOMEM;
573 0 : if (0 == sr_read_sector(cd, cd->ms_offset + 16,
574 : CD_FRAMESIZE_RAW1, raw_sector)) {
575 0 : is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
576 : } else {
577 : /* read a raw sector failed for some reason. */
578 : is_xa = -1;
579 : }
580 0 : kfree(raw_sector);
581 : #ifdef DEBUG
582 : sr_printk(KERN_INFO, cd, "sr_is_xa: %d\n", is_xa);
583 : #endif
584 0 : return is_xa;
585 : }
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