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 | static int sr_read_tochdr(struct cdrom_device_info *cdi, |
37 | struct cdrom_tochdr *tochdr) |
38 | { |
39 | struct scsi_cd *cd = cdi->handle; |
40 | struct packet_command cgc; |
41 | int result; |
42 | unsigned char *buffer; |
43 | |
44 | buffer = kzalloc(size: 32, GFP_KERNEL); |
45 | if (!buffer) |
46 | return -ENOMEM; |
47 | |
48 | memset(&cgc, 0, sizeof(struct packet_command)); |
49 | cgc.timeout = IOCTL_TIMEOUT; |
50 | cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; |
51 | cgc.cmd[8] = 12; /* LSB of length */ |
52 | cgc.buffer = buffer; |
53 | cgc.buflen = 12; |
54 | cgc.quiet = 1; |
55 | cgc.data_direction = DMA_FROM_DEVICE; |
56 | |
57 | result = sr_do_ioctl(cd, &cgc); |
58 | if (result) |
59 | goto err; |
60 | |
61 | tochdr->cdth_trk0 = buffer[2]; |
62 | tochdr->cdth_trk1 = buffer[3]; |
63 | |
64 | err: |
65 | kfree(objp: buffer); |
66 | return result; |
67 | } |
68 | |
69 | static int sr_read_tocentry(struct cdrom_device_info *cdi, |
70 | struct cdrom_tocentry *tocentry) |
71 | { |
72 | struct scsi_cd *cd = cdi->handle; |
73 | struct packet_command cgc; |
74 | int result; |
75 | unsigned char *buffer; |
76 | |
77 | buffer = kzalloc(size: 32, GFP_KERNEL); |
78 | if (!buffer) |
79 | return -ENOMEM; |
80 | |
81 | memset(&cgc, 0, sizeof(struct packet_command)); |
82 | cgc.timeout = IOCTL_TIMEOUT; |
83 | cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; |
84 | cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0; |
85 | cgc.cmd[6] = tocentry->cdte_track; |
86 | cgc.cmd[8] = 12; /* LSB of length */ |
87 | cgc.buffer = buffer; |
88 | cgc.buflen = 12; |
89 | cgc.data_direction = DMA_FROM_DEVICE; |
90 | |
91 | result = sr_do_ioctl(cd, &cgc); |
92 | if (result) |
93 | goto err; |
94 | |
95 | tocentry->cdte_ctrl = buffer[5] & 0xf; |
96 | tocentry->cdte_adr = buffer[5] >> 4; |
97 | tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0; |
98 | if (tocentry->cdte_format == CDROM_MSF) { |
99 | tocentry->cdte_addr.msf.minute = buffer[9]; |
100 | tocentry->cdte_addr.msf.second = buffer[10]; |
101 | tocentry->cdte_addr.msf.frame = buffer[11]; |
102 | } else |
103 | tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8) |
104 | + buffer[10]) << 8) + buffer[11]; |
105 | |
106 | err: |
107 | kfree(objp: buffer); |
108 | return result; |
109 | } |
110 | |
111 | #define IOCTL_RETRIES 3 |
112 | |
113 | /* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives |
114 | are emulating a SCSI device via the idescsi module, they need to have |
115 | CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */ |
116 | |
117 | static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti) |
118 | { |
119 | struct cdrom_tocentry trk0_te, trk1_te; |
120 | struct cdrom_tochdr tochdr; |
121 | struct packet_command cgc; |
122 | int ntracks, ret; |
123 | |
124 | ret = sr_read_tochdr(cdi, tochdr: &tochdr); |
125 | if (ret) |
126 | return ret; |
127 | |
128 | ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1; |
129 | |
130 | if (ti->cdti_trk1 == ntracks) |
131 | ti->cdti_trk1 = CDROM_LEADOUT; |
132 | else if (ti->cdti_trk1 != CDROM_LEADOUT) |
133 | ti->cdti_trk1 ++; |
134 | |
135 | trk0_te.cdte_track = ti->cdti_trk0; |
136 | trk0_te.cdte_format = CDROM_MSF; |
137 | trk1_te.cdte_track = ti->cdti_trk1; |
138 | trk1_te.cdte_format = CDROM_MSF; |
139 | |
140 | ret = sr_read_tocentry(cdi, tocentry: &trk0_te); |
141 | if (ret) |
142 | return ret; |
143 | ret = sr_read_tocentry(cdi, tocentry: &trk1_te); |
144 | if (ret) |
145 | return ret; |
146 | |
147 | memset(&cgc, 0, sizeof(struct packet_command)); |
148 | cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF; |
149 | cgc.cmd[3] = trk0_te.cdte_addr.msf.minute; |
150 | cgc.cmd[4] = trk0_te.cdte_addr.msf.second; |
151 | cgc.cmd[5] = trk0_te.cdte_addr.msf.frame; |
152 | cgc.cmd[6] = trk1_te.cdte_addr.msf.minute; |
153 | cgc.cmd[7] = trk1_te.cdte_addr.msf.second; |
154 | cgc.cmd[8] = trk1_te.cdte_addr.msf.frame; |
155 | cgc.data_direction = DMA_NONE; |
156 | cgc.timeout = IOCTL_TIMEOUT; |
157 | return sr_do_ioctl(cdi->handle, &cgc); |
158 | } |
159 | |
160 | static int sr_play_trkind(struct cdrom_device_info *cdi, |
161 | struct cdrom_ti *ti) |
162 | |
163 | { |
164 | struct scsi_cd *cd = cdi->handle; |
165 | struct packet_command cgc; |
166 | int result; |
167 | |
168 | memset(&cgc, 0, sizeof(struct packet_command)); |
169 | cgc.timeout = IOCTL_TIMEOUT; |
170 | cgc.cmd[0] = GPCMD_PLAYAUDIO_TI; |
171 | cgc.cmd[4] = ti->cdti_trk0; |
172 | cgc.cmd[5] = ti->cdti_ind0; |
173 | cgc.cmd[7] = ti->cdti_trk1; |
174 | cgc.cmd[8] = ti->cdti_ind1; |
175 | cgc.data_direction = DMA_NONE; |
176 | |
177 | result = sr_do_ioctl(cd, &cgc); |
178 | if (result == -EDRIVE_CANT_DO_THIS) |
179 | result = sr_fake_playtrkind(cdi, ti); |
180 | |
181 | return result; |
182 | } |
183 | |
184 | /* We do our own retries because we want to know what the specific |
185 | error code is. Normally the UNIT_ATTENTION code will automatically |
186 | clear after one error */ |
187 | |
188 | int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc) |
189 | { |
190 | struct scsi_device *SDev; |
191 | struct scsi_sense_hdr local_sshdr, *sshdr; |
192 | int result, err = 0, retries = 0; |
193 | const struct scsi_exec_args exec_args = { |
194 | .sshdr = cgc->sshdr ? : &local_sshdr, |
195 | }; |
196 | |
197 | SDev = cd->device; |
198 | |
199 | sshdr = exec_args.sshdr; |
200 | |
201 | retry: |
202 | if (!scsi_block_when_processing_errors(SDev)) { |
203 | err = -ENODEV; |
204 | goto out; |
205 | } |
206 | |
207 | result = scsi_execute_cmd(sdev: SDev, cmd: cgc->cmd, |
208 | opf: cgc->data_direction == DMA_TO_DEVICE ? |
209 | REQ_OP_DRV_OUT : REQ_OP_DRV_IN, buffer: cgc->buffer, |
210 | bufflen: cgc->buflen, timeout: cgc->timeout, IOCTL_RETRIES, |
211 | args: &exec_args); |
212 | /* Minimal error checking. Ignore cases we know about, and report the rest. */ |
213 | if (result < 0) { |
214 | err = result; |
215 | goto out; |
216 | } |
217 | if (scsi_status_is_check_condition(status: result)) { |
218 | switch (sshdr->sense_key) { |
219 | case UNIT_ATTENTION: |
220 | SDev->changed = 1; |
221 | if (!cgc->quiet) |
222 | sr_printk(KERN_INFO, cd, |
223 | "disc change detected.\n" ); |
224 | if (retries++ < 10) |
225 | goto retry; |
226 | err = -ENOMEDIUM; |
227 | break; |
228 | case NOT_READY: /* This happens if there is no disc in drive */ |
229 | if (sshdr->asc == 0x04 && |
230 | sshdr->ascq == 0x01) { |
231 | /* sense: Logical unit is in process of becoming ready */ |
232 | if (!cgc->quiet) |
233 | sr_printk(KERN_INFO, cd, |
234 | "CDROM not ready yet.\n" ); |
235 | if (retries++ < 10) { |
236 | /* sleep 2 sec and try again */ |
237 | ssleep(seconds: 2); |
238 | goto retry; |
239 | } else { |
240 | /* 20 secs are enough? */ |
241 | err = -ENOMEDIUM; |
242 | break; |
243 | } |
244 | } |
245 | if (!cgc->quiet) |
246 | sr_printk(KERN_INFO, cd, |
247 | "CDROM not ready. Make sure there " |
248 | "is a disc in the drive.\n" ); |
249 | err = -ENOMEDIUM; |
250 | break; |
251 | case ILLEGAL_REQUEST: |
252 | err = -EIO; |
253 | if (sshdr->asc == 0x20 && |
254 | sshdr->ascq == 0x00) |
255 | /* sense: Invalid command operation code */ |
256 | err = -EDRIVE_CANT_DO_THIS; |
257 | break; |
258 | default: |
259 | err = -EIO; |
260 | } |
261 | } |
262 | |
263 | /* Wake up a process waiting for device */ |
264 | out: |
265 | cgc->stat = err; |
266 | return err; |
267 | } |
268 | |
269 | /* ---------------------------------------------------------------------- */ |
270 | /* interface to cdrom.c */ |
271 | |
272 | int sr_tray_move(struct cdrom_device_info *cdi, int pos) |
273 | { |
274 | Scsi_CD *cd = cdi->handle; |
275 | struct packet_command cgc; |
276 | |
277 | memset(&cgc, 0, sizeof(struct packet_command)); |
278 | cgc.cmd[0] = GPCMD_START_STOP_UNIT; |
279 | cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ; |
280 | cgc.data_direction = DMA_NONE; |
281 | cgc.timeout = IOCTL_TIMEOUT; |
282 | return sr_do_ioctl(cd, cgc: &cgc); |
283 | } |
284 | |
285 | int sr_lock_door(struct cdrom_device_info *cdi, int lock) |
286 | { |
287 | Scsi_CD *cd = cdi->handle; |
288 | |
289 | return scsi_set_medium_removal(cd->device, lock ? |
290 | SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); |
291 | } |
292 | |
293 | int sr_drive_status(struct cdrom_device_info *cdi, int slot) |
294 | { |
295 | struct scsi_cd *cd = cdi->handle; |
296 | struct scsi_sense_hdr sshdr; |
297 | struct media_event_desc med; |
298 | |
299 | if (CDSL_CURRENT != slot) { |
300 | /* we have no changer support */ |
301 | return -EINVAL; |
302 | } |
303 | if (!scsi_test_unit_ready(sdev: cd->device, SR_TIMEOUT, MAX_RETRIES, sshdr: &sshdr)) |
304 | return CDS_DISC_OK; |
305 | |
306 | /* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */ |
307 | if (scsi_sense_valid(sshdr: &sshdr) && sshdr.sense_key == NOT_READY |
308 | && sshdr.asc == 0x04 && sshdr.ascq == 0x01) |
309 | return CDS_DRIVE_NOT_READY; |
310 | |
311 | if (!cdrom_get_media_event(cdi, med: &med)) { |
312 | if (med.media_present) |
313 | return CDS_DISC_OK; |
314 | else if (med.door_open) |
315 | return CDS_TRAY_OPEN; |
316 | else |
317 | return CDS_NO_DISC; |
318 | } |
319 | |
320 | /* |
321 | * SK/ASC/ASCQ of 2/4/2 means "initialization required" |
322 | * Using CD_TRAY_OPEN results in an START_STOP_UNIT to close |
323 | * the tray, which resolves the initialization requirement. |
324 | */ |
325 | if (scsi_sense_valid(sshdr: &sshdr) && sshdr.sense_key == NOT_READY |
326 | && sshdr.asc == 0x04 && sshdr.ascq == 0x02) |
327 | return CDS_TRAY_OPEN; |
328 | |
329 | /* |
330 | * 0x04 is format in progress .. but there must be a disc present! |
331 | */ |
332 | if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04) |
333 | return CDS_DISC_OK; |
334 | |
335 | /* |
336 | * If not using Mt Fuji extended media tray reports, |
337 | * just return TRAY_OPEN since ATAPI doesn't provide |
338 | * any other way to detect this... |
339 | */ |
340 | if (scsi_sense_valid(sshdr: &sshdr) && |
341 | /* 0x3a is medium not present */ |
342 | sshdr.asc == 0x3a) |
343 | return CDS_NO_DISC; |
344 | else |
345 | return CDS_TRAY_OPEN; |
346 | |
347 | return CDS_DRIVE_NOT_READY; |
348 | } |
349 | |
350 | int sr_disk_status(struct cdrom_device_info *cdi) |
351 | { |
352 | Scsi_CD *cd = cdi->handle; |
353 | struct cdrom_tochdr toc_h; |
354 | struct cdrom_tocentry toc_e; |
355 | int i, rc, have_datatracks = 0; |
356 | |
357 | /* look for data tracks */ |
358 | rc = sr_read_tochdr(cdi, tochdr: &toc_h); |
359 | if (rc) |
360 | return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO; |
361 | |
362 | for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) { |
363 | toc_e.cdte_track = i; |
364 | toc_e.cdte_format = CDROM_LBA; |
365 | if (sr_read_tocentry(cdi, tocentry: &toc_e)) |
366 | return CDS_NO_INFO; |
367 | if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) { |
368 | have_datatracks = 1; |
369 | break; |
370 | } |
371 | } |
372 | if (!have_datatracks) |
373 | return CDS_AUDIO; |
374 | |
375 | if (cd->xa_flag) |
376 | return CDS_XA_2_1; |
377 | else |
378 | return CDS_DATA_1; |
379 | } |
380 | |
381 | int sr_get_last_session(struct cdrom_device_info *cdi, |
382 | struct cdrom_multisession *ms_info) |
383 | { |
384 | Scsi_CD *cd = cdi->handle; |
385 | |
386 | ms_info->addr.lba = cd->ms_offset; |
387 | ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0; |
388 | |
389 | return 0; |
390 | } |
391 | |
392 | int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) |
393 | { |
394 | Scsi_CD *cd = cdi->handle; |
395 | struct packet_command cgc; |
396 | char *buffer = kzalloc(size: 32, GFP_KERNEL); |
397 | int result; |
398 | |
399 | if (!buffer) |
400 | return -ENOMEM; |
401 | |
402 | memset(&cgc, 0, sizeof(struct packet_command)); |
403 | cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; |
404 | cgc.cmd[2] = 0x40; /* I do want the subchannel info */ |
405 | cgc.cmd[3] = 0x02; /* Give me medium catalog number info */ |
406 | cgc.cmd[8] = 24; |
407 | cgc.buffer = buffer; |
408 | cgc.buflen = 24; |
409 | cgc.data_direction = DMA_FROM_DEVICE; |
410 | cgc.timeout = IOCTL_TIMEOUT; |
411 | result = sr_do_ioctl(cd, cgc: &cgc); |
412 | if (result) |
413 | goto err; |
414 | |
415 | memcpy(mcn->medium_catalog_number, buffer + 9, 13); |
416 | mcn->medium_catalog_number[13] = 0; |
417 | |
418 | err: |
419 | kfree(objp: buffer); |
420 | return result; |
421 | } |
422 | |
423 | int sr_reset(struct cdrom_device_info *cdi) |
424 | { |
425 | return 0; |
426 | } |
427 | |
428 | int sr_select_speed(struct cdrom_device_info *cdi, int speed) |
429 | { |
430 | Scsi_CD *cd = cdi->handle; |
431 | struct packet_command cgc; |
432 | |
433 | if (speed == 0) |
434 | speed = 0xffff; /* set to max */ |
435 | else |
436 | speed *= 177; /* Nx to kbyte/s */ |
437 | |
438 | memset(&cgc, 0, sizeof(struct packet_command)); |
439 | cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */ |
440 | cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */ |
441 | cgc.cmd[3] = speed & 0xff; /* LSB */ |
442 | cgc.data_direction = DMA_NONE; |
443 | cgc.timeout = IOCTL_TIMEOUT; |
444 | |
445 | if (sr_do_ioctl(cd, cgc: &cgc)) |
446 | return -EIO; |
447 | return 0; |
448 | } |
449 | |
450 | /* ----------------------------------------------------------------------- */ |
451 | /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */ |
452 | /* because the generic cdrom driver does the user access stuff for us. */ |
453 | /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */ |
454 | /* sr_disk_status interface for the generic cdrom driver. */ |
455 | |
456 | int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) |
457 | { |
458 | switch (cmd) { |
459 | case CDROMREADTOCHDR: |
460 | return sr_read_tochdr(cdi, tochdr: arg); |
461 | case CDROMREADTOCENTRY: |
462 | return sr_read_tocentry(cdi, tocentry: arg); |
463 | case CDROMPLAYTRKIND: |
464 | return sr_play_trkind(cdi, ti: arg); |
465 | default: |
466 | return -EINVAL; |
467 | } |
468 | } |
469 | |
470 | /* ----------------------------------------------------------------------- |
471 | * a function to read all sorts of funny cdrom sectors using the READ_CD |
472 | * scsi-3 mmc command |
473 | * |
474 | * lba: linear block address |
475 | * format: 0 = data (anything) |
476 | * 1 = audio |
477 | * 2 = data (mode 1) |
478 | * 3 = data (mode 2) |
479 | * 4 = data (mode 2 form1) |
480 | * 5 = data (mode 2 form2) |
481 | * blksize: 2048 | 2336 | 2340 | 2352 |
482 | */ |
483 | |
484 | static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize) |
485 | { |
486 | struct packet_command cgc; |
487 | |
488 | #ifdef DEBUG |
489 | sr_printk(KERN_INFO, cd, "sr_read_cd lba=%d format=%d blksize=%d\n" , |
490 | lba, format, blksize); |
491 | #endif |
492 | |
493 | memset(&cgc, 0, sizeof(struct packet_command)); |
494 | cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */ |
495 | cgc.cmd[1] = ((format & 7) << 2); |
496 | cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; |
497 | cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; |
498 | cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; |
499 | cgc.cmd[5] = (unsigned char) lba & 0xff; |
500 | cgc.cmd[8] = 1; |
501 | switch (blksize) { |
502 | case 2336: |
503 | cgc.cmd[9] = 0x58; |
504 | break; |
505 | case 2340: |
506 | cgc.cmd[9] = 0x78; |
507 | break; |
508 | case 2352: |
509 | cgc.cmd[9] = 0xf8; |
510 | break; |
511 | default: |
512 | cgc.cmd[9] = 0x10; |
513 | break; |
514 | } |
515 | cgc.buffer = dest; |
516 | cgc.buflen = blksize; |
517 | cgc.data_direction = DMA_FROM_DEVICE; |
518 | cgc.timeout = IOCTL_TIMEOUT; |
519 | return sr_do_ioctl(cd, cgc: &cgc); |
520 | } |
521 | |
522 | /* |
523 | * read sectors with blocksizes other than 2048 |
524 | */ |
525 | |
526 | static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest) |
527 | { |
528 | struct packet_command cgc; |
529 | int rc; |
530 | |
531 | /* we try the READ CD command first... */ |
532 | if (cd->readcd_known) { |
533 | rc = sr_read_cd(cd, dest, lba, format: 0, blksize); |
534 | if (-EDRIVE_CANT_DO_THIS != rc) |
535 | return rc; |
536 | cd->readcd_known = 0; |
537 | sr_printk(KERN_INFO, cd, |
538 | "CDROM doesn't support READ CD (0xbe) command\n" ); |
539 | /* fall & retry the other way */ |
540 | } |
541 | /* ... if this fails, we switch the blocksize using MODE SELECT */ |
542 | if (blksize != cd->device->sector_size) { |
543 | if (0 != (rc = sr_set_blocklength(cd, blocklength: blksize))) |
544 | return rc; |
545 | } |
546 | #ifdef DEBUG |
547 | sr_printk(KERN_INFO, cd, "sr_read_sector lba=%d blksize=%d\n" , |
548 | lba, blksize); |
549 | #endif |
550 | |
551 | memset(&cgc, 0, sizeof(struct packet_command)); |
552 | cgc.cmd[0] = GPCMD_READ_10; |
553 | cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; |
554 | cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; |
555 | cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; |
556 | cgc.cmd[5] = (unsigned char) lba & 0xff; |
557 | cgc.cmd[8] = 1; |
558 | cgc.buffer = dest; |
559 | cgc.buflen = blksize; |
560 | cgc.data_direction = DMA_FROM_DEVICE; |
561 | cgc.timeout = IOCTL_TIMEOUT; |
562 | rc = sr_do_ioctl(cd, cgc: &cgc); |
563 | |
564 | if (blksize != CD_FRAMESIZE) |
565 | rc |= sr_set_blocklength(cd, CD_FRAMESIZE); |
566 | return rc; |
567 | } |
568 | |
569 | /* |
570 | * read a sector in raw mode to check the sector format |
571 | * ret: 1 == mode2 (XA), 0 == mode1, <0 == error |
572 | */ |
573 | |
574 | int sr_is_xa(Scsi_CD *cd) |
575 | { |
576 | unsigned char *raw_sector; |
577 | int is_xa; |
578 | |
579 | if (!xa_test) |
580 | return 0; |
581 | |
582 | raw_sector = kmalloc(size: 2048, GFP_KERNEL); |
583 | if (!raw_sector) |
584 | return -ENOMEM; |
585 | if (0 == sr_read_sector(cd, lba: cd->ms_offset + 16, |
586 | CD_FRAMESIZE_RAW1, dest: raw_sector)) { |
587 | is_xa = (raw_sector[3] == 0x02) ? 1 : 0; |
588 | } else { |
589 | /* read a raw sector failed for some reason. */ |
590 | is_xa = -1; |
591 | } |
592 | kfree(objp: raw_sector); |
593 | #ifdef DEBUG |
594 | sr_printk(KERN_INFO, cd, "sr_is_xa: %d\n" , is_xa); |
595 | #endif |
596 | return is_xa; |
597 | } |
598 | |