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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 <linux/slab.h> |
11 | #include <asm/io.h> |
12 | #include <asm/uaccess.h> |
13 | |
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_cmnd.h> |
21 | |
22 | #include "sr.h" |
23 | |
24 | #if 0 |
25 | #define DEBUG |
26 | #endif |
27 | |
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; |
31 | |
32 | module_param(xa_test, int, S_IRUGO | S_IWUSR); |
33 | |
34 | /* primitive to determine whether we need to have GFP_DMA set based on |
35 | * the status of the unchecked_isa_dma flag in the host structure */ |
36 | #define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0) |
37 | |
38 | |
39 | static int sr_read_tochdr(struct cdrom_device_info *cdi, |
40 | struct cdrom_tochdr *tochdr) |
41 | { |
42 | struct scsi_cd *cd = cdi->handle; |
43 | struct packet_command cgc; |
44 | int result; |
45 | unsigned char *buffer; |
46 | |
47 | buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); |
48 | if (!buffer) |
49 | return -ENOMEM; |
50 | |
51 | memset(&cgc, 0, sizeof(struct packet_command)); |
52 | cgc.timeout = IOCTL_TIMEOUT; |
53 | cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; |
54 | cgc.cmd[8] = 12; /* LSB of length */ |
55 | cgc.buffer = buffer; |
56 | cgc.buflen = 12; |
57 | cgc.quiet = 1; |
58 | cgc.data_direction = DMA_FROM_DEVICE; |
59 | |
60 | result = sr_do_ioctl(cd, &cgc); |
61 | |
62 | tochdr->cdth_trk0 = buffer[2]; |
63 | tochdr->cdth_trk1 = buffer[3]; |
64 | |
65 | kfree(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 = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); |
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 | |
93 | tocentry->cdte_ctrl = buffer[5] & 0xf; |
94 | tocentry->cdte_adr = buffer[5] >> 4; |
95 | tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0; |
96 | if (tocentry->cdte_format == CDROM_MSF) { |
97 | tocentry->cdte_addr.msf.minute = buffer[9]; |
98 | tocentry->cdte_addr.msf.second = buffer[10]; |
99 | tocentry->cdte_addr.msf.frame = buffer[11]; |
100 | } else |
101 | tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8) |
102 | + buffer[10]) << 8) + buffer[11]; |
103 | |
104 | kfree(buffer); |
105 | return result; |
106 | } |
107 | |
108 | #define IOCTL_RETRIES 3 |
109 | |
110 | /* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives |
111 | are emulating a SCSI device via the idescsi module, they need to have |
112 | CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */ |
113 | |
114 | static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti) |
115 | { |
116 | struct cdrom_tocentry trk0_te, trk1_te; |
117 | struct cdrom_tochdr tochdr; |
118 | struct packet_command cgc; |
119 | int ntracks, ret; |
120 | |
121 | ret = sr_read_tochdr(cdi, &tochdr); |
122 | if (ret) |
123 | return ret; |
124 | |
125 | ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1; |
126 | |
127 | if (ti->cdti_trk1 == ntracks) |
128 | ti->cdti_trk1 = CDROM_LEADOUT; |
129 | else if (ti->cdti_trk1 != CDROM_LEADOUT) |
130 | ti->cdti_trk1 ++; |
131 | |
132 | trk0_te.cdte_track = ti->cdti_trk0; |
133 | trk0_te.cdte_format = CDROM_MSF; |
134 | trk1_te.cdte_track = ti->cdti_trk1; |
135 | trk1_te.cdte_format = CDROM_MSF; |
136 | |
137 | ret = sr_read_tocentry(cdi, &trk0_te); |
138 | if (ret) |
139 | return ret; |
140 | ret = sr_read_tocentry(cdi, &trk1_te); |
141 | if (ret) |
142 | return ret; |
143 | |
144 | memset(&cgc, 0, sizeof(struct packet_command)); |
145 | cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF; |
146 | cgc.cmd[3] = trk0_te.cdte_addr.msf.minute; |
147 | cgc.cmd[4] = trk0_te.cdte_addr.msf.second; |
148 | cgc.cmd[5] = trk0_te.cdte_addr.msf.frame; |
149 | cgc.cmd[6] = trk1_te.cdte_addr.msf.minute; |
150 | cgc.cmd[7] = trk1_te.cdte_addr.msf.second; |
151 | cgc.cmd[8] = trk1_te.cdte_addr.msf.frame; |
152 | cgc.data_direction = DMA_NONE; |
153 | cgc.timeout = IOCTL_TIMEOUT; |
154 | return sr_do_ioctl(cdi->handle, &cgc); |
155 | } |
156 | |
157 | static int sr_play_trkind(struct cdrom_device_info *cdi, |
158 | struct cdrom_ti *ti) |
159 | |
160 | { |
161 | struct scsi_cd *cd = cdi->handle; |
162 | struct packet_command cgc; |
163 | int result; |
164 | |
165 | memset(&cgc, 0, sizeof(struct packet_command)); |
166 | cgc.timeout = IOCTL_TIMEOUT; |
167 | cgc.cmd[0] = GPCMD_PLAYAUDIO_TI; |
168 | cgc.cmd[4] = ti->cdti_trk0; |
169 | cgc.cmd[5] = ti->cdti_ind0; |
170 | cgc.cmd[7] = ti->cdti_trk1; |
171 | cgc.cmd[8] = ti->cdti_ind1; |
172 | cgc.data_direction = DMA_NONE; |
173 | |
174 | result = sr_do_ioctl(cd, &cgc); |
175 | if (result == -EDRIVE_CANT_DO_THIS) |
176 | result = sr_fake_playtrkind(cdi, ti); |
177 | |
178 | return result; |
179 | } |
180 | |
181 | /* We do our own retries because we want to know what the specific |
182 | error code is. Normally the UNIT_ATTENTION code will automatically |
183 | clear after one error */ |
184 | |
185 | int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc) |
186 | { |
187 | struct scsi_device *SDev; |
188 | struct scsi_sense_hdr sshdr; |
189 | int result, err = 0, retries = 0; |
190 | struct request_sense *sense = cgc->sense; |
191 | |
192 | SDev = cd->device; |
193 | |
194 | if (!sense) { |
195 | sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL); |
196 | if (!sense) { |
197 | err = -ENOMEM; |
198 | goto out; |
199 | } |
200 | } |
201 | |
202 | retry: |
203 | if (!scsi_block_when_processing_errors(SDev)) { |
204 | err = -ENODEV; |
205 | goto out; |
206 | } |
207 | |
208 | memset(sense, 0, sizeof(*sense)); |
209 | result = scsi_execute(SDev, cgc->cmd, cgc->data_direction, |
210 | cgc->buffer, cgc->buflen, (char *)sense, |
211 | cgc->timeout, IOCTL_RETRIES, 0, NULL); |
212 | |
213 | scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr); |
214 | |
215 | /* Minimal error checking. Ignore cases we know about, and report the rest. */ |
216 | if (driver_byte(result) != 0) { |
217 | switch (sshdr.sense_key) { |
218 | case UNIT_ATTENTION: |
219 | SDev->changed = 1; |
220 | if (!cgc->quiet) |
221 | printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name); |
222 | if (retries++ < 10) |
223 | goto retry; |
224 | err = -ENOMEDIUM; |
225 | break; |
226 | case NOT_READY: /* This happens if there is no disc in drive */ |
227 | if (sshdr.asc == 0x04 && |
228 | sshdr.ascq == 0x01) { |
229 | /* sense: Logical unit is in process of becoming ready */ |
230 | if (!cgc->quiet) |
231 | printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name); |
232 | if (retries++ < 10) { |
233 | /* sleep 2 sec and try again */ |
234 | ssleep(2); |
235 | goto retry; |
236 | } else { |
237 | /* 20 secs are enough? */ |
238 | err = -ENOMEDIUM; |
239 | break; |
240 | } |
241 | } |
242 | if (!cgc->quiet) |
243 | printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name); |
244 | #ifdef DEBUG |
245 | scsi_print_sense_hdr("sr", &sshdr); |
246 | #endif |
247 | err = -ENOMEDIUM; |
248 | break; |
249 | case ILLEGAL_REQUEST: |
250 | err = -EIO; |
251 | if (sshdr.asc == 0x20 && |
252 | sshdr.ascq == 0x00) |
253 | /* sense: Invalid command operation code */ |
254 | err = -EDRIVE_CANT_DO_THIS; |
255 | #ifdef DEBUG |
256 | __scsi_print_command(cgc->cmd); |
257 | scsi_print_sense_hdr("sr", &sshdr); |
258 | #endif |
259 | break; |
260 | default: |
261 | printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name); |
262 | __scsi_print_command(cgc->cmd); |
263 | scsi_print_sense_hdr("sr", &sshdr); |
264 | err = -EIO; |
265 | } |
266 | } |
267 | |
268 | /* Wake up a process waiting for device */ |
269 | out: |
270 | if (!cgc->sense) |
271 | kfree(sense); |
272 | cgc->stat = err; |
273 | return err; |
274 | } |
275 | |
276 | /* ---------------------------------------------------------------------- */ |
277 | /* interface to cdrom.c */ |
278 | |
279 | int sr_tray_move(struct cdrom_device_info *cdi, int pos) |
280 | { |
281 | Scsi_CD *cd = cdi->handle; |
282 | struct packet_command cgc; |
283 | |
284 | memset(&cgc, 0, sizeof(struct packet_command)); |
285 | cgc.cmd[0] = GPCMD_START_STOP_UNIT; |
286 | cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ; |
287 | cgc.data_direction = DMA_NONE; |
288 | cgc.timeout = IOCTL_TIMEOUT; |
289 | return sr_do_ioctl(cd, &cgc); |
290 | } |
291 | |
292 | int sr_lock_door(struct cdrom_device_info *cdi, int lock) |
293 | { |
294 | Scsi_CD *cd = cdi->handle; |
295 | |
296 | return scsi_set_medium_removal(cd->device, lock ? |
297 | SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); |
298 | } |
299 | |
300 | int sr_drive_status(struct cdrom_device_info *cdi, int slot) |
301 | { |
302 | struct scsi_cd *cd = cdi->handle; |
303 | struct scsi_sense_hdr sshdr; |
304 | struct media_event_desc med; |
305 | |
306 | if (CDSL_CURRENT != slot) { |
307 | /* we have no changer support */ |
308 | return -EINVAL; |
309 | } |
310 | if (0 == sr_test_unit_ready(cd->device, &sshdr)) |
311 | return CDS_DISC_OK; |
312 | |
313 | /* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */ |
314 | if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY |
315 | && sshdr.asc == 0x04 && sshdr.ascq == 0x01) |
316 | return CDS_DRIVE_NOT_READY; |
317 | |
318 | if (!cdrom_get_media_event(cdi, &med)) { |
319 | if (med.media_present) |
320 | return CDS_DISC_OK; |
321 | else if (med.door_open) |
322 | return CDS_TRAY_OPEN; |
323 | else |
324 | return CDS_NO_DISC; |
325 | } |
326 | |
327 | /* |
328 | * 0x04 is format in progress .. but there must be a disc present! |
329 | */ |
330 | if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04) |
331 | return CDS_DISC_OK; |
332 | |
333 | /* |
334 | * If not using Mt Fuji extended media tray reports, |
335 | * just return TRAY_OPEN since ATAPI doesn't provide |
336 | * any other way to detect this... |
337 | */ |
338 | if (scsi_sense_valid(&sshdr) && |
339 | /* 0x3a is medium not present */ |
340 | sshdr.asc == 0x3a) |
341 | return CDS_NO_DISC; |
342 | else |
343 | return CDS_TRAY_OPEN; |
344 | |
345 | return CDS_DRIVE_NOT_READY; |
346 | } |
347 | |
348 | int sr_disk_status(struct cdrom_device_info *cdi) |
349 | { |
350 | Scsi_CD *cd = cdi->handle; |
351 | struct cdrom_tochdr toc_h; |
352 | struct cdrom_tocentry toc_e; |
353 | int i, rc, have_datatracks = 0; |
354 | |
355 | /* look for data tracks */ |
356 | rc = sr_read_tochdr(cdi, &toc_h); |
357 | if (rc) |
358 | return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO; |
359 | |
360 | for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) { |
361 | toc_e.cdte_track = i; |
362 | toc_e.cdte_format = CDROM_LBA; |
363 | if (sr_read_tocentry(cdi, &toc_e)) |
364 | return CDS_NO_INFO; |
365 | if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) { |
366 | have_datatracks = 1; |
367 | break; |
368 | } |
369 | } |
370 | if (!have_datatracks) |
371 | return CDS_AUDIO; |
372 | |
373 | if (cd->xa_flag) |
374 | return CDS_XA_2_1; |
375 | else |
376 | return CDS_DATA_1; |
377 | } |
378 | |
379 | int sr_get_last_session(struct cdrom_device_info *cdi, |
380 | struct cdrom_multisession *ms_info) |
381 | { |
382 | Scsi_CD *cd = cdi->handle; |
383 | |
384 | ms_info->addr.lba = cd->ms_offset; |
385 | ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0; |
386 | |
387 | return 0; |
388 | } |
389 | |
390 | int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) |
391 | { |
392 | Scsi_CD *cd = cdi->handle; |
393 | struct packet_command cgc; |
394 | char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); |
395 | int result; |
396 | |
397 | if (!buffer) |
398 | return -ENOMEM; |
399 | |
400 | memset(&cgc, 0, sizeof(struct packet_command)); |
401 | cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; |
402 | cgc.cmd[2] = 0x40; /* I do want the subchannel info */ |
403 | cgc.cmd[3] = 0x02; /* Give me medium catalog number info */ |
404 | cgc.cmd[8] = 24; |
405 | cgc.buffer = buffer; |
406 | cgc.buflen = 24; |
407 | cgc.data_direction = DMA_FROM_DEVICE; |
408 | cgc.timeout = IOCTL_TIMEOUT; |
409 | result = sr_do_ioctl(cd, &cgc); |
410 | |
411 | memcpy(mcn->medium_catalog_number, buffer + 9, 13); |
412 | mcn->medium_catalog_number[13] = 0; |
413 | |
414 | kfree(buffer); |
415 | return result; |
416 | } |
417 | |
418 | int sr_reset(struct cdrom_device_info *cdi) |
419 | { |
420 | return 0; |
421 | } |
422 | |
423 | int sr_select_speed(struct cdrom_device_info *cdi, int speed) |
424 | { |
425 | Scsi_CD *cd = cdi->handle; |
426 | struct packet_command cgc; |
427 | |
428 | if (speed == 0) |
429 | speed = 0xffff; /* set to max */ |
430 | else |
431 | speed *= 177; /* Nx to kbyte/s */ |
432 | |
433 | memset(&cgc, 0, sizeof(struct packet_command)); |
434 | cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */ |
435 | cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */ |
436 | cgc.cmd[3] = speed & 0xff; /* LSB */ |
437 | cgc.data_direction = DMA_NONE; |
438 | cgc.timeout = IOCTL_TIMEOUT; |
439 | |
440 | if (sr_do_ioctl(cd, &cgc)) |
441 | return -EIO; |
442 | return 0; |
443 | } |
444 | |
445 | /* ----------------------------------------------------------------------- */ |
446 | /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */ |
447 | /* because the generic cdrom driver does the user access stuff for us. */ |
448 | /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */ |
449 | /* sr_disk_status interface for the generic cdrom driver. */ |
450 | |
451 | int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) |
452 | { |
453 | switch (cmd) { |
454 | case CDROMREADTOCHDR: |
455 | return sr_read_tochdr(cdi, arg); |
456 | case CDROMREADTOCENTRY: |
457 | return sr_read_tocentry(cdi, arg); |
458 | case CDROMPLAYTRKIND: |
459 | return sr_play_trkind(cdi, arg); |
460 | default: |
461 | return -EINVAL; |
462 | } |
463 | } |
464 | |
465 | /* ----------------------------------------------------------------------- |
466 | * a function to read all sorts of funny cdrom sectors using the READ_CD |
467 | * scsi-3 mmc command |
468 | * |
469 | * lba: linear block address |
470 | * format: 0 = data (anything) |
471 | * 1 = audio |
472 | * 2 = data (mode 1) |
473 | * 3 = data (mode 2) |
474 | * 4 = data (mode 2 form1) |
475 | * 5 = data (mode 2 form2) |
476 | * blksize: 2048 | 2336 | 2340 | 2352 |
477 | */ |
478 | |
479 | static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize) |
480 | { |
481 | struct packet_command cgc; |
482 | |
483 | #ifdef DEBUG |
484 | printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n", |
485 | cd->cdi.name, lba, format, blksize); |
486 | #endif |
487 | |
488 | memset(&cgc, 0, sizeof(struct packet_command)); |
489 | cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */ |
490 | cgc.cmd[1] = ((format & 7) << 2); |
491 | cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; |
492 | cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; |
493 | cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; |
494 | cgc.cmd[5] = (unsigned char) lba & 0xff; |
495 | cgc.cmd[8] = 1; |
496 | switch (blksize) { |
497 | case 2336: |
498 | cgc.cmd[9] = 0x58; |
499 | break; |
500 | case 2340: |
501 | cgc.cmd[9] = 0x78; |
502 | break; |
503 | case 2352: |
504 | cgc.cmd[9] = 0xf8; |
505 | break; |
506 | default: |
507 | cgc.cmd[9] = 0x10; |
508 | break; |
509 | } |
510 | cgc.buffer = dest; |
511 | cgc.buflen = blksize; |
512 | cgc.data_direction = DMA_FROM_DEVICE; |
513 | cgc.timeout = IOCTL_TIMEOUT; |
514 | return sr_do_ioctl(cd, &cgc); |
515 | } |
516 | |
517 | /* |
518 | * read sectors with blocksizes other than 2048 |
519 | */ |
520 | |
521 | static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest) |
522 | { |
523 | struct packet_command cgc; |
524 | int rc; |
525 | |
526 | /* we try the READ CD command first... */ |
527 | if (cd->readcd_known) { |
528 | rc = sr_read_cd(cd, dest, lba, 0, blksize); |
529 | if (-EDRIVE_CANT_DO_THIS != rc) |
530 | return rc; |
531 | cd->readcd_known = 0; |
532 | printk("CDROM does'nt support READ CD (0xbe) command\n"); |
533 | /* fall & retry the other way */ |
534 | } |
535 | /* ... if this fails, we switch the blocksize using MODE SELECT */ |
536 | if (blksize != cd->device->sector_size) { |
537 | if (0 != (rc = sr_set_blocklength(cd, blksize))) |
538 | return rc; |
539 | } |
540 | #ifdef DEBUG |
541 | printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize); |
542 | #endif |
543 | |
544 | memset(&cgc, 0, sizeof(struct packet_command)); |
545 | cgc.cmd[0] = GPCMD_READ_10; |
546 | cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; |
547 | cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; |
548 | cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; |
549 | cgc.cmd[5] = (unsigned char) lba & 0xff; |
550 | cgc.cmd[8] = 1; |
551 | cgc.buffer = dest; |
552 | cgc.buflen = blksize; |
553 | cgc.data_direction = DMA_FROM_DEVICE; |
554 | cgc.timeout = IOCTL_TIMEOUT; |
555 | rc = sr_do_ioctl(cd, &cgc); |
556 | |
557 | return rc; |
558 | } |
559 | |
560 | /* |
561 | * read a sector in raw mode to check the sector format |
562 | * ret: 1 == mode2 (XA), 0 == mode1, <0 == error |
563 | */ |
564 | |
565 | int sr_is_xa(Scsi_CD *cd) |
566 | { |
567 | unsigned char *raw_sector; |
568 | int is_xa; |
569 | |
570 | if (!xa_test) |
571 | return 0; |
572 | |
573 | raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd)); |
574 | if (!raw_sector) |
575 | return -ENOMEM; |
576 | if (0 == sr_read_sector(cd, cd->ms_offset + 16, |
577 | CD_FRAMESIZE_RAW1, raw_sector)) { |
578 | is_xa = (raw_sector[3] == 0x02) ? 1 : 0; |
579 | } else { |
580 | /* read a raw sector failed for some reason. */ |
581 | is_xa = -1; |
582 | } |
583 | kfree(raw_sector); |
584 | #ifdef DEBUG |
585 | printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa); |
586 | #endif |
587 | return is_xa; |
588 | } |
589 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
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jz-2.6.39
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jz-3.11
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jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9