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 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 {
41 struct scsi_cd *cd = cdi->handle;
42 struct packet_command cgc;
43 int result;
44 unsigned char *buffer;
45
46 buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
47 if (!buffer)
48 return -ENOMEM;
49
50 memset(&cgc, 0, sizeof(struct packet_command));
51 cgc.timeout = IOCTL_TIMEOUT;
52 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
53 cgc.cmd[8] = 12; /* LSB of length */
54 cgc.buffer = buffer;
55 cgc.buflen = 12;
56 cgc.quiet = 1;
57 cgc.data_direction = DMA_FROM_DEVICE;
58
59 result = sr_do_ioctl(cd, &cgc);
60
61 tochdr->cdth_trk0 = buffer[2];
62 tochdr->cdth_trk1 = buffer[3];
63
64 kfree(buffer);
65 return result;
66 }
67
68 static int sr_read_tocentry(struct cdrom_device_info *cdi,
69 struct cdrom_tocentry *tocentry)
70 {
71 struct scsi_cd *cd = cdi->handle;
72 struct packet_command cgc;
73 int result;
74 unsigned char *buffer;
75
76 buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
77 if (!buffer)
78 return -ENOMEM;
79
80 memset(&cgc, 0, sizeof(struct packet_command));
81 cgc.timeout = IOCTL_TIMEOUT;
82 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
83 cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
84 cgc.cmd[6] = tocentry->cdte_track;
85 cgc.cmd[8] = 12; /* LSB of length */
86 cgc.buffer = buffer;
87 cgc.buflen = 12;
88 cgc.data_direction = DMA_FROM_DEVICE;
89
90 result = sr_do_ioctl(cd, &cgc);
91
92 tocentry->cdte_ctrl = buffer[5] & 0xf;
93 tocentry->cdte_adr = buffer[5] >> 4;
94 tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
95 if (tocentry->cdte_format == CDROM_MSF) {
96 tocentry->cdte_addr.msf.minute = buffer[9];
97 tocentry->cdte_addr.msf.second = buffer[10];
98 tocentry->cdte_addr.msf.frame = buffer[11];
99 } else
100 tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
101 + buffer[10]) << 8) + buffer[11];
102
103 kfree(buffer);
104 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 struct cdrom_tocentry trk0_te, trk1_te;
116 struct cdrom_tochdr tochdr;
117 struct packet_command cgc;
118 int ntracks, ret;
119
120 ret = sr_read_tochdr(cdi, &tochdr);
121 if (ret)
122 return ret;
123
124 ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
125
126 if (ti->cdti_trk1 == ntracks)
127 ti->cdti_trk1 = CDROM_LEADOUT;
128 else if (ti->cdti_trk1 != CDROM_LEADOUT)
129 ti->cdti_trk1 ++;
130
131 trk0_te.cdte_track = ti->cdti_trk0;
132 trk0_te.cdte_format = CDROM_MSF;
133 trk1_te.cdte_track = ti->cdti_trk1;
134 trk1_te.cdte_format = CDROM_MSF;
135
136 ret = sr_read_tocentry(cdi, &trk0_te);
137 if (ret)
138 return ret;
139 ret = sr_read_tocentry(cdi, &trk1_te);
140 if (ret)
141 return ret;
142
143 memset(&cgc, 0, sizeof(struct packet_command));
144 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
145 cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
146 cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
147 cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
148 cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
149 cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
150 cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
151 cgc.data_direction = DMA_NONE;
152 cgc.timeout = IOCTL_TIMEOUT;
153 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
159 {
160 struct scsi_cd *cd = cdi->handle;
161 struct packet_command cgc;
162 int result;
163
164 memset(&cgc, 0, sizeof(struct packet_command));
165 cgc.timeout = IOCTL_TIMEOUT;
166 cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
167 cgc.cmd[4] = ti->cdti_trk0;
168 cgc.cmd[5] = ti->cdti_ind0;
169 cgc.cmd[7] = ti->cdti_trk1;
170 cgc.cmd[8] = ti->cdti_ind1;
171 cgc.data_direction = DMA_NONE;
172
173 result = sr_do_ioctl(cd, &cgc);
174 if (result == -EDRIVE_CANT_DO_THIS)
175 result = sr_fake_playtrkind(cdi, ti);
176
177 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 struct scsi_device *SDev;
187 struct scsi_sense_hdr sshdr;
188 int result, err = 0, retries = 0;
189 struct request_sense *sense = cgc->sense;
190
191 SDev = cd->device;
192
193 if (!sense) {
194 sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
195 if (!sense) {
196 err = -ENOMEM;
197 goto out;
198 }
199 }
200
201 retry:
202 if (!scsi_block_when_processing_errors(SDev)) {
203 err = -ENODEV;
204 goto out;
205 }
206
207 memset(sense, 0, sizeof(*sense));
208 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 scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr);
213
214 /* Minimal error checking. Ignore cases we know about, and report the rest. */
215 if (driver_byte(result) != 0) {
216 switch (sshdr.sense_key) {
217 case UNIT_ATTENTION:
218 SDev->changed = 1;
219 if (!cgc->quiet)
220 printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
221 if (retries++ < 10)
222 goto retry;
223 err = -ENOMEDIUM;
224 break;
225 case NOT_READY: /* This happens if there is no disc in drive */
226 if (sshdr.asc == 0x04 &&
227 sshdr.ascq == 0x01) {
228 /* sense: Logical unit is in process of becoming ready */
229 if (!cgc->quiet)
230 printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
231 if (retries++ < 10) {
232 /* sleep 2 sec and try again */
233 ssleep(2);
234 goto retry;
235 } else {
236 /* 20 secs are enough? */
237 err = -ENOMEDIUM;
238 break;
239 }
240 }
241 if (!cgc->quiet)
242 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 err = -ENOMEDIUM;
247 break;
248 case ILLEGAL_REQUEST:
249 err = -EIO;
250 if (sshdr.asc == 0x20 &&
251 sshdr.ascq == 0x00)
252 /* sense: Invalid command operation code */
253 err = -EDRIVE_CANT_DO_THIS;
254 #ifdef DEBUG
255 __scsi_print_command(cgc->cmd);
256 scsi_print_sense_hdr("sr", &sshdr);
257 #endif
258 break;
259 default:
260 printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
261 __scsi_print_command(cgc->cmd);
262 scsi_print_sense_hdr("sr", &sshdr);
263 err = -EIO;
264 }
265 }
266
267 /* Wake up a process waiting for device */
268 out:
269 if (!cgc->sense)
270 kfree(sense);
271 cgc->stat = err;
272 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 Scsi_CD *cd = cdi->handle;
281 struct packet_command cgc;
282
283 memset(&cgc, 0, sizeof(struct packet_command));
284 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
285 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
286 cgc.data_direction = DMA_NONE;
287 cgc.timeout = IOCTL_TIMEOUT;
288 return sr_do_ioctl(cd, &cgc);
289 }
290
291 int sr_lock_door(struct cdrom_device_info *cdi, int lock)
292 {
293 Scsi_CD *cd = cdi->handle;
294
295 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 struct scsi_cd *cd = cdi->handle;
302 struct scsi_sense_hdr sshdr;
303 struct media_event_desc med;
304
305 if (CDSL_CURRENT != slot) {
306 /* we have no changer support */
307 return -EINVAL;
308 }
309 if (0 == sr_test_unit_ready(cd->device, &sshdr))
310 return CDS_DISC_OK;
311
312 /* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */
313 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
314 && sshdr.asc == 0x04 && sshdr.ascq == 0x01)
315 return CDS_DRIVE_NOT_READY;
316
317 if (!cdrom_get_media_event(cdi, &med)) {
318 if (med.media_present)
319 return CDS_DISC_OK;
320 else if (med.door_open)
321 return CDS_TRAY_OPEN;
322 else
323 return CDS_NO_DISC;
324 }
325
326 /*
327 * 0x04 is format in progress .. but there must be a disc present!
328 */
329 if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04)
330 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 if (scsi_sense_valid(&sshdr) &&
338 /* 0x3a is medium not present */
339 sshdr.asc == 0x3a)
340 return CDS_NO_DISC;
341 else
342 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 Scsi_CD *cd = cdi->handle;
350 struct cdrom_tochdr toc_h;
351 struct cdrom_tocentry toc_e;
352 int i, rc, have_datatracks = 0;
353
354 /* look for data tracks */
355 rc = sr_read_tochdr(cdi, &toc_h);
356 if (rc)
357 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
358
359 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
360 toc_e.cdte_track = i;
361 toc_e.cdte_format = CDROM_LBA;
362 if (sr_read_tocentry(cdi, &toc_e))
363 return CDS_NO_INFO;
364 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
365 have_datatracks = 1;
366 break;
367 }
368 }
369 if (!have_datatracks)
370 return CDS_AUDIO;
371
372 if (cd->xa_flag)
373 return CDS_XA_2_1;
374 else
375 return CDS_DATA_1;
376 }
377
378 int sr_get_last_session(struct cdrom_device_info *cdi,
379 struct cdrom_multisession *ms_info)
380 {
381 Scsi_CD *cd = cdi->handle;
382
383 ms_info->addr.lba = cd->ms_offset;
384 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;
385
386 return 0;
387 }
388
389 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
390 {
391 Scsi_CD *cd = cdi->handle;
392 struct packet_command cgc;
393 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
394 int result;
395
396 if (!buffer)
397 return -ENOMEM;
398
399 memset(&cgc, 0, sizeof(struct packet_command));
400 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
401 cgc.cmd[2] = 0x40; /* I do want the subchannel info */
402 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */
403 cgc.cmd[8] = 24;
404 cgc.buffer = buffer;
405 cgc.buflen = 24;
406 cgc.data_direction = DMA_FROM_DEVICE;
407 cgc.timeout = IOCTL_TIMEOUT;
408 result = sr_do_ioctl(cd, &cgc);
409
410 memcpy(mcn->medium_catalog_number, buffer + 9, 13);
411 mcn->medium_catalog_number[13] = 0;
412
413 kfree(buffer);
414 return result;
415 }
416
417 int sr_reset(struct cdrom_device_info *cdi)
418 {
419 return 0;
420 }
421
422 int sr_select_speed(struct cdrom_device_info *cdi, int speed)
423 {
424 Scsi_CD *cd = cdi->handle;
425 struct packet_command cgc;
426
427 if (speed == 0)
428 speed = 0xffff; /* set to max */
429 else
430 speed *= 177; /* Nx to kbyte/s */
431
432 memset(&cgc, 0, sizeof(struct packet_command));
433 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
434 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
435 cgc.cmd[3] = speed & 0xff; /* LSB */
436 cgc.data_direction = DMA_NONE;
437 cgc.timeout = IOCTL_TIMEOUT;
438
439 if (sr_do_ioctl(cd, &cgc))
440 return -EIO;
441 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 switch (cmd) {
453 case CDROMREADTOCHDR:
454 return sr_read_tochdr(cdi, arg);
455 case CDROMREADTOCENTRY:
456 return sr_read_tocentry(cdi, arg);
457 case CDROMPLAYTRKIND:
458 return sr_play_trkind(cdi, arg);
459 default:
460 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 struct packet_command cgc;
481
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 memset(&cgc, 0, sizeof(struct packet_command));
488 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
489 cgc.cmd[1] = ((format & 7) << 2);
490 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
491 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
492 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
493 cgc.cmd[5] = (unsigned char) lba & 0xff;
494 cgc.cmd[8] = 1;
495 switch (blksize) {
496 case 2336:
497 cgc.cmd[9] = 0x58;
498 break;
499 case 2340:
500 cgc.cmd[9] = 0x78;
501 break;
502 case 2352:
503 cgc.cmd[9] = 0xf8;
504 break;
505 default:
506 cgc.cmd[9] = 0x10;
507 break;
508 }
509 cgc.buffer = dest;
510 cgc.buflen = blksize;
511 cgc.data_direction = DMA_FROM_DEVICE;
512 cgc.timeout = IOCTL_TIMEOUT;
513 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 struct packet_command cgc;
523 int rc;
524
525 /* we try the READ CD command first... */
526 if (cd->readcd_known) {
527 rc = sr_read_cd(cd, dest, lba, 0, blksize);
528 if (-EDRIVE_CANT_DO_THIS != rc)
529 return rc;
530 cd->readcd_known = 0;
531 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 if (blksize != cd->device->sector_size) {
536 if (0 != (rc = sr_set_blocklength(cd, blksize)))
537 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 memset(&cgc, 0, sizeof(struct packet_command));
544 cgc.cmd[0] = GPCMD_READ_10;
545 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
546 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
547 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
548 cgc.cmd[5] = (unsigned char) lba & 0xff;
549 cgc.cmd[8] = 1;
550 cgc.buffer = dest;
551 cgc.buflen = blksize;
552 cgc.data_direction = DMA_FROM_DEVICE;
553 cgc.timeout = IOCTL_TIMEOUT;
554 rc = sr_do_ioctl(cd, &cgc);
555
556 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 unsigned char *raw_sector;
567 int is_xa;
568
569 if (!xa_test)
570 return 0;
571
572 raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
573 if (!raw_sector)
574 return -ENOMEM;
575 if (0 == sr_read_sector(cd, cd->ms_offset + 16,
576 CD_FRAMESIZE_RAW1, raw_sector)) {
577 is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
578 } else {
579 /* read a raw sector failed for some reason. */
580 is_xa = -1;
581 }
582 kfree(raw_sector);
583 #ifdef DEBUG
584 printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
585 #endif
586 return is_xa;
587 }
588
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