Line data Source code
1 : #include <linux/kernel.h>
2 : #include <linux/mm.h>
3 : #include <linux/fs.h>
4 : #include <linux/errno.h>
5 : #include <linux/string.h>
6 : #include <linux/blkdev.h>
7 : #include <linux/blkpg.h>
8 : #include <linux/cdrom.h>
9 : #include <linux/delay.h>
10 : #include <asm/io.h>
11 : #include <asm/uaccess.h>
12 :
13 : #include <scsi/scsi.h>
14 : #include <scsi/scsi_dbg.h>
15 : #include <scsi/scsi_device.h>
16 : #include <scsi/scsi_eh.h>
17 : #include <scsi/scsi_host.h>
18 : #include <scsi/scsi_ioctl.h>
19 : #include <scsi/scsi_cmnd.h>
20 :
21 : #include "sr.h"
22 :
23 : #if 0
24 : #define DEBUG
25 : #endif
26 :
27 : /* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
28 : * It is off by default and can be turned on with this module parameter */
29 1 : static int xa_test = 0;
30 :
31 : module_param(xa_test, int, S_IRUGO | S_IWUSR);
32 :
33 : /* primitive to determine whether we need to have GFP_DMA set based on
34 : * the status of the unchecked_isa_dma flag in the host structure */
35 : #define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
36 :
37 :
38 : static int sr_read_tochdr(struct cdrom_device_info *cdi,
39 : struct cdrom_tochdr *tochdr)
40 9 : {
41 27 : struct scsi_cd *cd = cdi->handle;
42 9 : struct packet_command cgc;
43 9 : int result;
44 9 : unsigned char *buffer;
45 :
46 81 : buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
47 18 : if (!buffer)
48 9 : return -ENOMEM;
49 :
50 9 : memset(&cgc, 0, sizeof(struct packet_command));
51 9 : cgc.timeout = IOCTL_TIMEOUT;
52 9 : cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
53 9 : cgc.cmd[8] = 12; /* LSB of length */
54 9 : cgc.buffer = buffer;
55 9 : cgc.buflen = 12;
56 9 : cgc.quiet = 1;
57 9 : cgc.data_direction = DMA_FROM_DEVICE;
58 :
59 27 : result = sr_do_ioctl(cd, &cgc);
60 :
61 9 : tochdr->cdth_trk0 = buffer[2];
62 9 : tochdr->cdth_trk1 = buffer[3];
63 :
64 9 : kfree(buffer);
65 9 : return result;
66 : }
67 :
68 : static int sr_read_tocentry(struct cdrom_device_info *cdi,
69 : struct cdrom_tocentry *tocentry)
70 10 : {
71 30 : struct scsi_cd *cd = cdi->handle;
72 10 : struct packet_command cgc;
73 10 : int result;
74 10 : unsigned char *buffer;
75 :
76 90 : buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
77 20 : if (!buffer)
78 10 : return -ENOMEM;
79 :
80 10 : memset(&cgc, 0, sizeof(struct packet_command));
81 10 : cgc.timeout = IOCTL_TIMEOUT;
82 10 : cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
83 70 : cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
84 10 : cgc.cmd[6] = tocentry->cdte_track;
85 10 : cgc.cmd[8] = 12; /* LSB of length */
86 10 : cgc.buffer = buffer;
87 10 : cgc.buflen = 12;
88 10 : cgc.data_direction = DMA_FROM_DEVICE;
89 :
90 30 : result = sr_do_ioctl(cd, &cgc);
91 :
92 10 : tocentry->cdte_ctrl = buffer[5] & 0xf;
93 10 : tocentry->cdte_adr = buffer[5] >> 4;
94 20 : tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
95 30 : if (tocentry->cdte_format == CDROM_MSF) {
96 10 : tocentry->cdte_addr.msf.minute = buffer[9];
97 10 : tocentry->cdte_addr.msf.second = buffer[10];
98 10 : tocentry->cdte_addr.msf.frame = buffer[11];
99 : } else
100 10 : tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
101 : + buffer[10]) << 8) + buffer[11];
102 :
103 10 : kfree(buffer);
104 10 : return result;
105 : }
106 :
107 : #define IOCTL_RETRIES 3
108 :
109 : /* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives
110 : are emulating a SCSI device via the idescsi module, they need to have
111 : CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
112 :
113 : static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
114 : {
115 1 : struct cdrom_tocentry trk0_te, trk1_te;
116 1 : struct cdrom_tochdr tochdr;
117 1 : struct packet_command cgc;
118 1 : int ntracks, ret;
119 1 :
120 4 : ret = sr_read_tochdr(cdi, &tochdr);
121 3 : if (ret)
122 1 : return ret;
123 :
124 1 : ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
125 :
126 3 : if (ti->cdti_trk1 == ntracks)
127 1 : ti->cdti_trk1 = CDROM_LEADOUT;
128 3 : else if (ti->cdti_trk1 != CDROM_LEADOUT)
129 2 : ti->cdti_trk1 ++;
130 :
131 1 : trk0_te.cdte_track = ti->cdti_trk0;
132 1 : trk0_te.cdte_format = CDROM_MSF;
133 1 : trk1_te.cdte_track = ti->cdti_trk1;
134 1 : trk1_te.cdte_format = CDROM_MSF;
135 :
136 3 : ret = sr_read_tocentry(cdi, &trk0_te);
137 2 : if (ret)
138 1 : return ret;
139 3 : ret = sr_read_tocentry(cdi, &trk1_te);
140 2 : if (ret)
141 1 : return ret;
142 :
143 1 : memset(&cgc, 0, sizeof(struct packet_command));
144 1 : cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
145 1 : cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
146 1 : cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
147 1 : cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
148 1 : cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
149 1 : cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
150 1 : cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
151 1 : cgc.data_direction = DMA_NONE;
152 1 : cgc.timeout = IOCTL_TIMEOUT;
153 5 : return sr_do_ioctl(cdi->handle, &cgc);
154 : }
155 :
156 : static int sr_play_trkind(struct cdrom_device_info *cdi,
157 : struct cdrom_ti *ti)
158 1 :
159 1 : {
160 3 : struct scsi_cd *cd = cdi->handle;
161 : struct packet_command cgc;
162 : int result;
163 :
164 1 : memset(&cgc, 0, sizeof(struct packet_command));
165 1 : cgc.timeout = IOCTL_TIMEOUT;
166 1 : cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
167 1 : cgc.cmd[4] = ti->cdti_trk0;
168 1 : cgc.cmd[5] = ti->cdti_ind0;
169 1 : cgc.cmd[7] = ti->cdti_trk1;
170 1 : cgc.cmd[8] = ti->cdti_ind1;
171 1 : cgc.data_direction = DMA_NONE;
172 :
173 3 : result = sr_do_ioctl(cd, &cgc);
174 2 : if (result == -EDRIVE_CANT_DO_THIS)
175 5 : result = sr_fake_playtrkind(cdi, ti);
176 :
177 2 : return result;
178 : }
179 :
180 : /* We do our own retries because we want to know what the specific
181 : error code is. Normally the UNIT_ATTENTION code will automatically
182 : clear after one error */
183 :
184 : int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
185 : {
186 40 : struct scsi_device *SDev;
187 40 : struct scsi_sense_hdr sshdr;
188 120 : int result, err = 0, retries = 0;
189 80 : struct request_sense *sense = cgc->sense;
190 40 :
191 80 : SDev = cd->device;
192 40 :
193 120 : if (!sense) {
194 160 : sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
195 120 : if (!sense) {
196 40 : err = -ENOMEM;
197 40 : goto out;
198 : }
199 : }
200 :
201 : retry:
202 120 : if (!scsi_block_when_processing_errors(SDev)) {
203 40 : err = -ENODEV;
204 120 : goto out;
205 : }
206 :
207 40 : memset(sense, 0, sizeof(*sense));
208 120 : result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
209 : cgc->buffer, cgc->buflen, (char *)sense,
210 : cgc->timeout, IOCTL_RETRIES, 0, NULL);
211 :
212 40 : scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr);
213 :
214 : /* Minimal error checking. Ignore cases we know about, and report the rest. */
215 80 : if (driver_byte(result) != 0) {
216 : switch (sshdr.sense_key) {
217 120 : case UNIT_ATTENTION:
218 40 : SDev->changed = 1;
219 80 : if (!cgc->quiet)
220 40 : printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
221 160 : if (retries++ < 10)
222 40 : goto retry;
223 40 : err = -ENOMEDIUM;
224 40 : break;
225 160 : case NOT_READY: /* This happens if there is no disc in drive */
226 160 : if (sshdr.asc == 0x04 &&
227 : sshdr.ascq == 0x01) {
228 : /* sense: Logical unit is in process of becoming ready */
229 80 : if (!cgc->quiet)
230 40 : printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
231 160 : if (retries++ < 10) {
232 : /* sleep 2 sec and try again */
233 80 : ssleep(2);
234 40 : goto retry;
235 : } else {
236 : /* 20 secs are enough? */
237 40 : err = -ENOMEDIUM;
238 40 : break;
239 : }
240 : }
241 80 : if (!cgc->quiet)
242 40 : printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name);
243 : #ifdef DEBUG
244 : scsi_print_sense_hdr("sr", &sshdr);
245 : #endif
246 40 : err = -ENOMEDIUM;
247 40 : break;
248 160 : case ILLEGAL_REQUEST:
249 40 : err = -EIO;
250 160 : if (sshdr.asc == 0x20 &&
251 : sshdr.ascq == 0x00)
252 : /* sense: Invalid command operation code */
253 40 : err = -EDRIVE_CANT_DO_THIS;
254 : #ifdef DEBUG
255 : __scsi_print_command(cgc->cmd);
256 : scsi_print_sense_hdr("sr", &sshdr);
257 : #endif
258 40 : break;
259 80 : default:
260 80 : printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
261 40 : __scsi_print_command(cgc->cmd);
262 40 : scsi_print_sense_hdr("sr", &sshdr);
263 40 : err = -EIO;
264 : }
265 40 : }
266 :
267 40 : /* Wake up a process waiting for device */
268 : out:
269 240 : if (!cgc->sense)
270 80 : kfree(sense);
271 120 : cgc->stat = err;
272 80 : return err;
273 : }
274 :
275 : /* ---------------------------------------------------------------------- */
276 : /* interface to cdrom.c */
277 :
278 : int sr_tray_move(struct cdrom_device_info *cdi, int pos)
279 : {
280 3 : Scsi_CD *cd = cdi->handle;
281 1 : struct packet_command cgc;
282 1 :
283 1 : memset(&cgc, 0, sizeof(struct packet_command));
284 1 : cgc.cmd[0] = GPCMD_START_STOP_UNIT;
285 6 : cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
286 1 : cgc.data_direction = DMA_NONE;
287 1 : cgc.timeout = IOCTL_TIMEOUT;
288 4 : return sr_do_ioctl(cd, &cgc);
289 : }
290 :
291 : int sr_lock_door(struct cdrom_device_info *cdi, int lock)
292 : {
293 3 : Scsi_CD *cd = cdi->handle;
294 1 :
295 2 : return scsi_set_medium_removal(cd->device, lock ?
296 : SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
297 : }
298 :
299 : int sr_drive_status(struct cdrom_device_info *cdi, int slot)
300 : {
301 3 : struct scsi_cd *cd = cdi->handle;
302 1 : struct scsi_sense_hdr sshdr;
303 1 : struct media_event_desc med;
304 1 :
305 3 : if (CDSL_CURRENT != slot) {
306 1 : /* we have no changer support */
307 2 : return -EINVAL;
308 : }
309 5 : if (0 == sr_test_unit_ready(cd->device, &sshdr))
310 1 : return CDS_DISC_OK;
311 :
312 : /* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */
313 10 : if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
314 : && sshdr.asc == 0x04 && sshdr.ascq == 0x01)
315 1 : return CDS_DRIVE_NOT_READY;
316 :
317 3 : if (!cdrom_get_media_event(cdi, &med)) {
318 2 : if (med.media_present)
319 1 : return CDS_DISC_OK;
320 2 : else if (med.door_open)
321 1 : return CDS_TRAY_OPEN;
322 : else
323 1 : return CDS_NO_DISC;
324 : }
325 :
326 : /*
327 : * 0x04 is format in progress .. but there must be a disc present!
328 : */
329 4 : if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04)
330 1 : return CDS_DISC_OK;
331 :
332 : /*
333 : * If not using Mt Fuji extended media tray reports,
334 : * just return TRAY_OPEN since ATAPI doesn't provide
335 : * any other way to detect this...
336 : */
337 6 : if (scsi_sense_valid(&sshdr) &&
338 : /* 0x3a is medium not present */
339 : sshdr.asc == 0x3a)
340 1 : return CDS_NO_DISC;
341 : else
342 1 : return CDS_TRAY_OPEN;
343 :
344 : return CDS_DRIVE_NOT_READY;
345 : }
346 :
347 : int sr_disk_status(struct cdrom_device_info *cdi)
348 : {
349 21 : Scsi_CD *cd = cdi->handle;
350 7 : struct cdrom_tochdr toc_h;
351 7 : struct cdrom_tocentry toc_e;
352 14 : int i, rc, have_datatracks = 0;
353 7 :
354 7 : /* look for data tracks */
355 28 : rc = sr_read_tochdr(cdi, &toc_h);
356 14 : if (rc)
357 7 : return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
358 :
359 35 : for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
360 21 : toc_e.cdte_track = i;
361 14 : toc_e.cdte_format = CDROM_LBA;
362 35 : if (sr_read_tocentry(cdi, &toc_e))
363 7 : return CDS_NO_INFO;
364 14 : if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
365 14 : have_datatracks = 1;
366 7 : break;
367 : }
368 : }
369 28 : if (!have_datatracks)
370 14 : return CDS_AUDIO;
371 :
372 28 : if (cd->xa_flag)
373 14 : return CDS_XA_2_1;
374 : else
375 14 : return CDS_DATA_1;
376 : }
377 :
378 : int sr_get_last_session(struct cdrom_device_info *cdi,
379 : struct cdrom_multisession *ms_info)
380 1 : {
381 2 : Scsi_CD *cd = cdi->handle;
382 :
383 2 : ms_info->addr.lba = cd->ms_offset;
384 6 : ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;
385 :
386 1 : return 0;
387 : }
388 :
389 : int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
390 : {
391 3 : Scsi_CD *cd = cdi->handle;
392 1 : struct packet_command cgc;
393 10 : char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
394 1 : int result;
395 1 :
396 2 : if (!buffer)
397 1 : return -ENOMEM;
398 :
399 1 : memset(&cgc, 0, sizeof(struct packet_command));
400 1 : cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
401 1 : cgc.cmd[2] = 0x40; /* I do want the subchannel info */
402 1 : cgc.cmd[3] = 0x02; /* Give me medium catalog number info */
403 1 : cgc.cmd[8] = 24;
404 1 : cgc.buffer = buffer;
405 1 : cgc.buflen = 24;
406 1 : cgc.data_direction = DMA_FROM_DEVICE;
407 1 : cgc.timeout = IOCTL_TIMEOUT;
408 3 : result = sr_do_ioctl(cd, &cgc);
409 :
410 1 : memcpy(mcn->medium_catalog_number, buffer + 9, 13);
411 1 : mcn->medium_catalog_number[13] = 0;
412 :
413 1 : kfree(buffer);
414 1 : return result;
415 : }
416 :
417 : int sr_reset(struct cdrom_device_info *cdi)
418 : {
419 1 : return 0;
420 : }
421 :
422 : int sr_select_speed(struct cdrom_device_info *cdi, int speed)
423 : {
424 3 : Scsi_CD *cd = cdi->handle;
425 1 : struct packet_command cgc;
426 1 :
427 2 : if (speed == 0)
428 1 : speed = 0xffff; /* set to max */
429 : else
430 1 : speed *= 177; /* Nx to kbyte/s */
431 :
432 1 : memset(&cgc, 0, sizeof(struct packet_command));
433 1 : cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
434 1 : cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
435 1 : cgc.cmd[3] = speed & 0xff; /* LSB */
436 1 : cgc.data_direction = DMA_NONE;
437 1 : cgc.timeout = IOCTL_TIMEOUT;
438 :
439 5 : if (sr_do_ioctl(cd, &cgc))
440 1 : return -EIO;
441 1 : return 0;
442 : }
443 :
444 : /* ----------------------------------------------------------------------- */
445 : /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
446 : /* because the generic cdrom driver does the user access stuff for us. */
447 : /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
448 : /* sr_disk_status interface for the generic cdrom driver. */
449 :
450 : int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
451 : {
452 1 : switch (cmd) {
453 4 : case CDROMREADTOCHDR:
454 5 : return sr_read_tochdr(cdi, arg);
455 4 : case CDROMREADTOCENTRY:
456 4 : return sr_read_tocentry(cdi, arg);
457 4 : case CDROMPLAYTRKIND:
458 4 : return sr_play_trkind(cdi, arg);
459 2 : default:
460 2 : return -EINVAL;
461 : }
462 : }
463 :
464 : /* -----------------------------------------------------------------------
465 : * a function to read all sorts of funny cdrom sectors using the READ_CD
466 : * scsi-3 mmc command
467 : *
468 : * lba: linear block address
469 : * format: 0 = data (anything)
470 : * 1 = audio
471 : * 2 = data (mode 1)
472 : * 3 = data (mode 2)
473 : * 4 = data (mode 2 form1)
474 : * 5 = data (mode 2 form2)
475 : * blksize: 2048 | 2336 | 2340 | 2352
476 : */
477 :
478 : static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize)
479 : {
480 1 : struct packet_command cgc;
481 1 :
482 : #ifdef DEBUG
483 : printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
484 : cd->cdi.name, lba, format, blksize);
485 : #endif
486 :
487 1 : memset(&cgc, 0, sizeof(struct packet_command));
488 1 : cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
489 1 : cgc.cmd[1] = ((format & 7) << 2);
490 1 : cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
491 1 : cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
492 1 : cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
493 1 : cgc.cmd[5] = (unsigned char) lba & 0xff;
494 1 : cgc.cmd[8] = 1;
495 : switch (blksize) {
496 3 : case 2336:
497 1 : cgc.cmd[9] = 0x58;
498 1 : break;
499 4 : case 2340:
500 1 : cgc.cmd[9] = 0x78;
501 1 : break;
502 4 : case 2352:
503 1 : cgc.cmd[9] = 0xf8;
504 1 : break;
505 2 : default:
506 2 : cgc.cmd[9] = 0x10;
507 1 : break;
508 : }
509 1 : cgc.buffer = dest;
510 1 : cgc.buflen = blksize;
511 1 : cgc.data_direction = DMA_FROM_DEVICE;
512 1 : cgc.timeout = IOCTL_TIMEOUT;
513 4 : return sr_do_ioctl(cd, &cgc);
514 : }
515 :
516 : /*
517 : * read sectors with blocksizes other than 2048
518 : */
519 :
520 : static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
521 : {
522 1 : struct packet_command cgc;
523 1 : int rc;
524 :
525 : /* we try the READ CD command first... */
526 2 : if (cd->readcd_known) {
527 2 : rc = sr_read_cd(cd, dest, lba, 0, blksize);
528 2 : if (-EDRIVE_CANT_DO_THIS != rc)
529 1 : return rc;
530 1 : cd->readcd_known = 0;
531 1 : printk("CDROM does'nt support READ CD (0xbe) command\n");
532 : /* fall & retry the other way */
533 : }
534 : /* ... if this fails, we switch the blocksize using MODE SELECT */
535 4 : if (blksize != cd->device->sector_size) {
536 8 : if (0 != (rc = sr_set_blocklength(cd, blksize)))
537 1 : return rc;
538 : }
539 : #ifdef DEBUG
540 : printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
541 : #endif
542 :
543 3 : memset(&cgc, 0, sizeof(struct packet_command));
544 3 : cgc.cmd[0] = GPCMD_READ_10;
545 3 : cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
546 3 : cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
547 3 : cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
548 3 : cgc.cmd[5] = (unsigned char) lba & 0xff;
549 3 : cgc.cmd[8] = 1;
550 3 : cgc.buffer = dest;
551 3 : cgc.buflen = blksize;
552 3 : cgc.data_direction = DMA_FROM_DEVICE;
553 3 : cgc.timeout = IOCTL_TIMEOUT;
554 9 : rc = sr_do_ioctl(cd, &cgc);
555 :
556 1 : return rc;
557 : }
558 :
559 : /*
560 : * read a sector in raw mode to check the sector format
561 : * ret: 1 == mode2 (XA), 0 == mode1, <0 == error
562 : */
563 :
564 : int sr_is_xa(Scsi_CD *cd)
565 : {
566 1 : unsigned char *raw_sector;
567 1 : int is_xa;
568 1 :
569 3 : if (!xa_test)
570 1 : return 0;
571 :
572 9 : raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
573 2 : if (!raw_sector)
574 1 : return -ENOMEM;
575 7 : if (0 == sr_read_sector(cd, cd->ms_offset + 16,
576 : CD_FRAMESIZE_RAW1, raw_sector)) {
577 1 : is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
578 : } else {
579 : /* read a raw sector failed for some reason. */
580 1 : is_xa = -1;
581 : }
582 1 : kfree(raw_sector);
583 : #ifdef DEBUG
584 : printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
585 : #endif
586 1 : return is_xa;
587 : }
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