blob: cbb38c5197fad67299f32a36792ab1fc5cdeec3e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07002#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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090010#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#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>
James Bottomley820732b2005-06-12 22:21:29 -050020#include <scsi/scsi_cmnd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
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 */
30static int xa_test = 0;
31
32module_param(xa_test, int, S_IRUGO | S_IWUSR);
33
Christoph Hellwiga09c6312006-01-11 14:28:06 +010034/* 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
39static 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
69static 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}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
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
114static 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
Christoph Hellwiga09c6312006-01-11 14:28:06 +0100121 ret = sr_read_tochdr(cdi, &tochdr);
122 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 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
Christoph Hellwiga09c6312006-01-11 14:28:06 +0100137 ret = sr_read_tocentry(cdi, &trk0_te);
138 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 return ret;
Christoph Hellwiga09c6312006-01-11 14:28:06 +0100140 ret = sr_read_tocentry(cdi, &trk1_te);
141 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 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
Christoph Hellwiga09c6312006-01-11 14:28:06 +0100157static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181/* 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
185int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
186{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 struct scsi_device *SDev;
James Bottomley820732b2005-06-12 22:21:29 -0500188 struct scsi_sense_hdr sshdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 int result, err = 0, retries = 0;
James Bottomley820732b2005-06-12 22:21:29 -0500190 struct request_sense *sense = cgc->sense;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
192 SDev = cd->device;
James Bottomley820732b2005-06-12 22:21:29 -0500193
194 if (!sense) {
Linus Torvaldsf716d832006-03-06 17:41:44 -0800195 sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
James Bottomley820732b2005-06-12 22:21:29 -0500196 if (!sense) {
197 err = -ENOMEM;
198 goto out;
199 }
200 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
202 retry:
203 if (!scsi_block_when_processing_errors(SDev)) {
204 err = -ENODEV;
James Bottomley820732b2005-06-12 22:21:29 -0500205 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 }
207
James Bottomley820732b2005-06-12 22:21:29 -0500208 memset(sense, 0, sizeof(*sense));
209 result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
210 cgc->buffer, cgc->buflen, (char *)sense,
FUJITA Tomonorif4f4e472008-12-04 14:24:39 +0900211 cgc->timeout, IOCTL_RETRIES, 0, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
James Bottomley820732b2005-06-12 22:21:29 -0500213 scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
215 /* Minimal error checking. Ignore cases we know about, and report the rest. */
216 if (driver_byte(result) != 0) {
James Bottomley820732b2005-06-12 22:21:29 -0500217 switch (sshdr.sense_key) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 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 */
James Bottomley820732b2005-06-12 22:21:29 -0500227 if (sshdr.asc == 0x04 &&
228 sshdr.ascq == 0x01) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 /* 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
James Bottomley820732b2005-06-12 22:21:29 -0500245 scsi_print_sense_hdr("sr", &sshdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246#endif
247 err = -ENOMEDIUM;
248 break;
249 case ILLEGAL_REQUEST:
250 err = -EIO;
James Bottomley820732b2005-06-12 22:21:29 -0500251 if (sshdr.asc == 0x20 &&
252 sshdr.ascq == 0x00)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 /* sense: Invalid command operation code */
254 err = -EDRIVE_CANT_DO_THIS;
255#ifdef DEBUG
256 __scsi_print_command(cgc->cmd);
James Bottomley820732b2005-06-12 22:21:29 -0500257 scsi_print_sense_hdr("sr", &sshdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258#endif
259 break;
260 default:
261 printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
262 __scsi_print_command(cgc->cmd);
James Bottomley820732b2005-06-12 22:21:29 -0500263 scsi_print_sense_hdr("sr", &sshdr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 err = -EIO;
265 }
266 }
267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 /* Wake up a process waiting for device */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 out:
James Bottomley820732b2005-06-12 22:21:29 -0500270 if (!cgc->sense)
271 kfree(sense);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 cgc->stat = err;
273 return err;
274}
275
276/* ---------------------------------------------------------------------- */
277/* interface to cdrom.c */
278
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279int 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
292int 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
300int sr_drive_status(struct cdrom_device_info *cdi, int slot)
301{
James Bottomley210ba1d2008-01-05 10:39:51 -0600302 struct scsi_cd *cd = cdi->handle;
303 struct scsi_sense_hdr sshdr;
304 struct media_event_desc med;
305
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 if (CDSL_CURRENT != slot) {
307 /* we have no changer support */
308 return -EINVAL;
309 }
James Bottomley38582a62008-02-06 13:01:58 -0600310 if (0 == sr_test_unit_ready(cd->device, &sshdr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 return CDS_DISC_OK;
312
Peter Jones96bcc722008-07-11 16:17:05 -0400313 /* 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
James Bottomley210ba1d2008-01-05 10:39:51 -0600318 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346}
347
348int 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 */
Christoph Hellwiga09c6312006-01-11 14:28:06 +0100356 rc = sr_read_tochdr(cdi, &toc_h);
357 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 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;
Christoph Hellwiga09c6312006-01-11 14:28:06 +0100363 if (sr_read_tocentry(cdi, &toc_e))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 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
379int 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390int 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
Nate Dailey3a73e8c2005-04-21 16:14:05 -0400397 if (!buffer)
398 return -ENOMEM;
399
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 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
418int sr_reset(struct cdrom_device_info *cdi)
419{
420 return 0;
421}
422
423int 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
451int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
452{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 switch (cmd) {
454 case CDROMREADTOCHDR:
Christoph Hellwiga09c6312006-01-11 14:28:06 +0100455 return sr_read_tochdr(cdi, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 case CDROMREADTOCENTRY:
Christoph Hellwiga09c6312006-01-11 14:28:06 +0100457 return sr_read_tocentry(cdi, arg);
458 case CDROMPLAYTRKIND:
459 return sr_play_trkind(cdi, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 default:
Christoph Hellwiga09c6312006-01-11 14:28:06 +0100461 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463}
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
479static 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
521static 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
565int 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
Robert P. J. Day5cbded52006-12-13 00:35:56 -0800573 raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 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}