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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / scsi / sr_ioctl.c
blobae87d08df58832c9d6ce60a091cbb8ace3203d7b
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);
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 if (!cdrom_get_media_event(cdi, &med)) {
313 if (med.media_present)
314 return CDS_DISC_OK;
315 else if (med.door_open)
316 return CDS_TRAY_OPEN;
317 else
318 return CDS_NO_DISC;
319 }
320
321 /*
322 * 0x04 is format in progress .. but there must be a disc present!
323 */
324 if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04)
325 return CDS_DISC_OK;
326
327 /*
328 * If not using Mt Fuji extended media tray reports,
329 * just return TRAY_OPEN since ATAPI doesn't provide
330 * any other way to detect this...
331 */
332 if (scsi_sense_valid(&sshdr) &&
333 /* 0x3a is medium not present */
334 sshdr.asc == 0x3a)
335 return CDS_NO_DISC;
336 else
337 return CDS_TRAY_OPEN;
338
339 return CDS_DRIVE_NOT_READY;
340 }
341
342 int sr_disk_status(struct cdrom_device_info *cdi)
343 {
344 Scsi_CD *cd = cdi->handle;
345 struct cdrom_tochdr toc_h;
346 struct cdrom_tocentry toc_e;
347 int i, rc, have_datatracks = 0;
348
349 /* look for data tracks */
350 rc = sr_read_tochdr(cdi, &toc_h);
351 if (rc)
352 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
353
354 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
355 toc_e.cdte_track = i;
356 toc_e.cdte_format = CDROM_LBA;
357 if (sr_read_tocentry(cdi, &toc_e))
358 return CDS_NO_INFO;
359 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
360 have_datatracks = 1;
361 break;
362 }
363 }
364 if (!have_datatracks)
365 return CDS_AUDIO;
366
367 if (cd->xa_flag)
368 return CDS_XA_2_1;
369 else
370 return CDS_DATA_1;
371 }
372
373 int sr_get_last_session(struct cdrom_device_info *cdi,
374 struct cdrom_multisession *ms_info)
375 {
376 Scsi_CD *cd = cdi->handle;
377
378 ms_info->addr.lba = cd->ms_offset;
379 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;
380
381 return 0;
382 }
383
384 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
385 {
386 Scsi_CD *cd = cdi->handle;
387 struct packet_command cgc;
388 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
389 int result;
390
391 if (!buffer)
392 return -ENOMEM;
393
394 memset(&cgc, 0, sizeof(struct packet_command));
395 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
396 cgc.cmd[2] = 0x40; /* I do want the subchannel info */
397 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */
398 cgc.cmd[8] = 24;
399 cgc.buffer = buffer;
400 cgc.buflen = 24;
401 cgc.data_direction = DMA_FROM_DEVICE;
402 cgc.timeout = IOCTL_TIMEOUT;
403 result = sr_do_ioctl(cd, &cgc);
404
405 memcpy(mcn->medium_catalog_number, buffer + 9, 13);
406 mcn->medium_catalog_number[13] = 0;
407
408 kfree(buffer);
409 return result;
410 }
411
412 int sr_reset(struct cdrom_device_info *cdi)
413 {
414 return 0;
415 }
416
417 int sr_select_speed(struct cdrom_device_info *cdi, int speed)
418 {
419 Scsi_CD *cd = cdi->handle;
420 struct packet_command cgc;
421
422 if (speed == 0)
423 speed = 0xffff; /* set to max */
424 else
425 speed *= 177; /* Nx to kbyte/s */
426
427 memset(&cgc, 0, sizeof(struct packet_command));
428 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
429 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
430 cgc.cmd[3] = speed & 0xff; /* LSB */
431 cgc.data_direction = DMA_NONE;
432 cgc.timeout = IOCTL_TIMEOUT;
433
434 if (sr_do_ioctl(cd, &cgc))
435 return -EIO;
436 return 0;
437 }
438
439 /* ----------------------------------------------------------------------- */
440 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
441 /* because the generic cdrom driver does the user access stuff for us. */
442 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
443 /* sr_disk_status interface for the generic cdrom driver. */
444
445 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
446 {
447 switch (cmd) {
448 case CDROMREADTOCHDR:
449 return sr_read_tochdr(cdi, arg);
450 case CDROMREADTOCENTRY:
451 return sr_read_tocentry(cdi, arg);
452 case CDROMPLAYTRKIND:
453 return sr_play_trkind(cdi, arg);
454 default:
455 return -EINVAL;
456 }
457 }
458
459 /* -----------------------------------------------------------------------
460 * a function to read all sorts of funny cdrom sectors using the READ_CD
461 * scsi-3 mmc command
462 *
463 * lba: linear block address
464 * format: 0 = data (anything)
465 * 1 = audio
466 * 2 = data (mode 1)
467 * 3 = data (mode 2)
468 * 4 = data (mode 2 form1)
469 * 5 = data (mode 2 form2)
470 * blksize: 2048 | 2336 | 2340 | 2352
471 */
472
473 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize)
474 {
475 struct packet_command cgc;
476
477 #ifdef DEBUG
478 printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
479 cd->cdi.name, lba, format, blksize);
480 #endif
481
482 memset(&cgc, 0, sizeof(struct packet_command));
483 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
484 cgc.cmd[1] = ((format & 7) << 2);
485 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
486 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
487 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
488 cgc.cmd[5] = (unsigned char) lba & 0xff;
489 cgc.cmd[8] = 1;
490 switch (blksize) {
491 case 2336:
492 cgc.cmd[9] = 0x58;
493 break;
494 case 2340:
495 cgc.cmd[9] = 0x78;
496 break;
497 case 2352:
498 cgc.cmd[9] = 0xf8;
499 break;
500 default:
501 cgc.cmd[9] = 0x10;
502 break;
503 }
504 cgc.buffer = dest;
505 cgc.buflen = blksize;
506 cgc.data_direction = DMA_FROM_DEVICE;
507 cgc.timeout = IOCTL_TIMEOUT;
508 return sr_do_ioctl(cd, &cgc);
509 }
510
511 /*
512 * read sectors with blocksizes other than 2048
513 */
514
515 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
516 {
517 struct packet_command cgc;
518 int rc;
519
520 /* we try the READ CD command first... */
521 if (cd->readcd_known) {
522 rc = sr_read_cd(cd, dest, lba, 0, blksize);
523 if (-EDRIVE_CANT_DO_THIS != rc)
524 return rc;
525 cd->readcd_known = 0;
526 printk("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 if (blksize != cd->device->sector_size) {
531 if (0 != (rc = sr_set_blocklength(cd, blksize)))
532 return rc;
533 }
534 #ifdef DEBUG
535 printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
536 #endif
537
538 memset(&cgc, 0, sizeof(struct packet_command));
539 cgc.cmd[0] = GPCMD_READ_10;
540 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
541 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
542 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
543 cgc.cmd[5] = (unsigned char) lba & 0xff;
544 cgc.cmd[8] = 1;
545 cgc.buffer = dest;
546 cgc.buflen = blksize;
547 cgc.data_direction = DMA_FROM_DEVICE;
548 cgc.timeout = IOCTL_TIMEOUT;
549 rc = sr_do_ioctl(cd, &cgc);
550
551 return rc;
552 }
553
554 /*
555 * read a sector in raw mode to check the sector format
556 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error
557 */
558
559 int sr_is_xa(Scsi_CD *cd)
560 {
561 unsigned char *raw_sector;
562 int is_xa;
563
564 if (!xa_test)
565 return 0;
566
567 raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
568 if (!raw_sector)
569 return -ENOMEM;
570 if (0 == sr_read_sector(cd, cd->ms_offset + 16,
571 CD_FRAMESIZE_RAW1, raw_sector)) {
572 is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
573 } else {
574 /* read a raw sector failed for some reason. */
575 is_xa = -1;
576 }
577 kfree(raw_sector);
578 #ifdef DEBUG
579 printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
580 #endif
581 return is_xa;
582 }
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