1 #include <linux/kernel.h>
2 #include <linux/sched.h>
5 #include <linux/errno.h>
6 #include <linux/string.h>
7 #include <linux/blkdev.h>
8 #include <linux/blkpg.h>
9 #include <linux/cdrom.h>
10 #include <linux/delay.h>
12 #include <asm/uaccess.h>
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>
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;
32 module_param(xa_test, int, S_IRUGO | S_IWUSR);
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)
39 static int sr_read_tochdr(struct cdrom_device_info *cdi,
40 struct cdrom_tochdr *tochdr)
42 struct scsi_cd *cd = cdi->handle;
43 struct packet_command cgc;
45 unsigned char *buffer;
47 buffer = kzalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
51 cgc.timeout = IOCTL_TIMEOUT;
52 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
53 cgc.cmd[8] = 12; /* LSB of length */
57 cgc.data_direction = DMA_FROM_DEVICE;
59 result = sr_do_ioctl(cd, &cgc);
61 tochdr->cdth_trk0 = buffer[2];
62 tochdr->cdth_trk1 = buffer[3];
68 static int sr_read_tocentry(struct cdrom_device_info *cdi,
69 struct cdrom_tocentry *tocentry)
71 struct scsi_cd *cd = cdi->handle;
72 struct packet_command cgc;
74 unsigned char *buffer;
76 buffer = kzalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
80 cgc.timeout = IOCTL_TIMEOUT;
81 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
82 cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
83 cgc.cmd[6] = tocentry->cdte_track;
84 cgc.cmd[8] = 12; /* LSB of length */
87 cgc.data_direction = DMA_FROM_DEVICE;
89 result = sr_do_ioctl(cd, &cgc);
91 tocentry->cdte_ctrl = buffer[5] & 0xf;
92 tocentry->cdte_adr = buffer[5] >> 4;
93 tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
94 if (tocentry->cdte_format == CDROM_MSF) {
95 tocentry->cdte_addr.msf.minute = buffer[9];
96 tocentry->cdte_addr.msf.second = buffer[10];
97 tocentry->cdte_addr.msf.frame = buffer[11];
99 tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
100 + buffer[10]) << 8) + buffer[11];
106 #define IOCTL_RETRIES 3
108 /* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives
109 are emulating a SCSI device via the idescsi module, they need to have
110 CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
112 static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
114 struct cdrom_tocentry trk0_te, trk1_te;
115 struct cdrom_tochdr tochdr;
116 struct packet_command cgc;
119 ret = sr_read_tochdr(cdi, &tochdr);
123 ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
125 if (ti->cdti_trk1 == ntracks)
126 ti->cdti_trk1 = CDROM_LEADOUT;
127 else if (ti->cdti_trk1 != CDROM_LEADOUT)
130 trk0_te.cdte_track = ti->cdti_trk0;
131 trk0_te.cdte_format = CDROM_MSF;
132 trk1_te.cdte_track = ti->cdti_trk1;
133 trk1_te.cdte_format = CDROM_MSF;
135 ret = sr_read_tocentry(cdi, &trk0_te);
138 ret = sr_read_tocentry(cdi, &trk1_te);
142 memset(&cgc, 0, sizeof(struct packet_command));
143 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
144 cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
145 cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
146 cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
147 cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
148 cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
149 cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
150 cgc.data_direction = DMA_NONE;
151 cgc.timeout = IOCTL_TIMEOUT;
152 return sr_do_ioctl(cdi->handle, &cgc);
155 static int sr_play_trkind(struct cdrom_device_info *cdi,
159 struct scsi_cd *cd = cdi->handle;
160 struct packet_command cgc;
163 memset(&cgc, 0, sizeof(struct packet_command));
164 cgc.timeout = IOCTL_TIMEOUT;
165 cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
166 cgc.cmd[4] = ti->cdti_trk0;
167 cgc.cmd[5] = ti->cdti_ind0;
168 cgc.cmd[7] = ti->cdti_trk1;
169 cgc.cmd[8] = ti->cdti_ind1;
170 cgc.data_direction = DMA_NONE;
172 result = sr_do_ioctl(cd, &cgc);
173 if (result == -EDRIVE_CANT_DO_THIS)
174 result = sr_fake_playtrkind(cdi, ti);
179 /* We do our own retries because we want to know what the specific
180 error code is. Normally the UNIT_ATTENTION code will automatically
181 clear after one error */
183 int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
185 struct scsi_device *SDev;
186 struct scsi_sense_hdr sshdr;
187 int result, err = 0, retries = 0;
188 struct request_sense *sense = cgc->sense;
193 sense = kmalloc(sizeof(*sense), GFP_KERNEL);
201 if (!scsi_block_when_processing_errors(SDev)) {
206 memset(sense, 0, sizeof(*sense));
207 result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
208 cgc->buffer, cgc->buflen, (char *)sense,
209 cgc->timeout, IOCTL_RETRIES, 0);
211 scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr);
213 /* Minimal error checking. Ignore cases we know about, and report the rest. */
214 if (driver_byte(result) != 0) {
215 switch (sshdr.sense_key) {
219 printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
224 case NOT_READY: /* This happens if there is no disc in drive */
225 if (sshdr.asc == 0x04 &&
226 sshdr.ascq == 0x01) {
227 /* sense: Logical unit is in process of becoming ready */
229 printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
230 if (retries++ < 10) {
231 /* sleep 2 sec and try again */
235 /* 20 secs are enough? */
241 printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name);
243 scsi_print_sense_hdr("sr", &sshdr);
247 case ILLEGAL_REQUEST:
249 if (sshdr.asc == 0x20 &&
251 /* sense: Invalid command operation code */
252 err = -EDRIVE_CANT_DO_THIS;
254 __scsi_print_command(cgc->cmd);
255 scsi_print_sense_hdr("sr", &sshdr);
259 printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
260 __scsi_print_command(cgc->cmd);
261 scsi_print_sense_hdr("sr", &sshdr);
266 /* Wake up a process waiting for device */
274 /* ---------------------------------------------------------------------- */
275 /* interface to cdrom.c */
277 static int test_unit_ready(Scsi_CD *cd)
279 struct packet_command cgc;
281 memset(&cgc, 0, sizeof(struct packet_command));
282 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
284 cgc.data_direction = DMA_NONE;
285 cgc.timeout = IOCTL_TIMEOUT;
286 return sr_do_ioctl(cd, &cgc);
289 int sr_tray_move(struct cdrom_device_info *cdi, int pos)
291 Scsi_CD *cd = cdi->handle;
292 struct packet_command cgc;
294 memset(&cgc, 0, sizeof(struct packet_command));
295 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
296 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
297 cgc.data_direction = DMA_NONE;
298 cgc.timeout = IOCTL_TIMEOUT;
299 return sr_do_ioctl(cd, &cgc);
302 int sr_lock_door(struct cdrom_device_info *cdi, int lock)
304 Scsi_CD *cd = cdi->handle;
306 return scsi_set_medium_removal(cd->device, lock ?
307 SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
310 int sr_drive_status(struct cdrom_device_info *cdi, int slot)
312 if (CDSL_CURRENT != slot) {
313 /* we have no changer support */
316 if (0 == test_unit_ready(cdi->handle))
319 return CDS_TRAY_OPEN;
322 int sr_disk_status(struct cdrom_device_info *cdi)
324 Scsi_CD *cd = cdi->handle;
325 struct cdrom_tochdr toc_h;
326 struct cdrom_tocentry toc_e;
327 int i, rc, have_datatracks = 0;
329 /* look for data tracks */
330 rc = sr_read_tochdr(cdi, &toc_h);
332 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
334 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
335 toc_e.cdte_track = i;
336 toc_e.cdte_format = CDROM_LBA;
337 if (sr_read_tocentry(cdi, &toc_e))
339 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
344 if (!have_datatracks)
353 int sr_get_last_session(struct cdrom_device_info *cdi,
354 struct cdrom_multisession *ms_info)
356 Scsi_CD *cd = cdi->handle;
358 ms_info->addr.lba = cd->ms_offset;
359 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;
364 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
366 Scsi_CD *cd = cdi->handle;
367 struct packet_command cgc;
368 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
374 memset(&cgc, 0, sizeof(struct packet_command));
375 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
376 cgc.cmd[2] = 0x40; /* I do want the subchannel info */
377 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */
381 cgc.data_direction = DMA_FROM_DEVICE;
382 cgc.timeout = IOCTL_TIMEOUT;
383 result = sr_do_ioctl(cd, &cgc);
385 memcpy(mcn->medium_catalog_number, buffer + 9, 13);
386 mcn->medium_catalog_number[13] = 0;
392 int sr_reset(struct cdrom_device_info *cdi)
397 int sr_select_speed(struct cdrom_device_info *cdi, int speed)
399 Scsi_CD *cd = cdi->handle;
400 struct packet_command cgc;
403 speed = 0xffff; /* set to max */
405 speed *= 177; /* Nx to kbyte/s */
407 memset(&cgc, 0, sizeof(struct packet_command));
408 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
409 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
410 cgc.cmd[3] = speed & 0xff; /* LSB */
411 cgc.data_direction = DMA_NONE;
412 cgc.timeout = IOCTL_TIMEOUT;
414 if (sr_do_ioctl(cd, &cgc))
419 /* ----------------------------------------------------------------------- */
420 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
421 /* because the generic cdrom driver does the user access stuff for us. */
422 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
423 /* sr_disk_status interface for the generic cdrom driver. */
425 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
428 case CDROMREADTOCHDR:
429 return sr_read_tochdr(cdi, arg);
430 case CDROMREADTOCENTRY:
431 return sr_read_tocentry(cdi, arg);
432 case CDROMPLAYTRKIND:
433 return sr_play_trkind(cdi, arg);
439 /* -----------------------------------------------------------------------
440 * a function to read all sorts of funny cdrom sectors using the READ_CD
443 * lba: linear block address
444 * format: 0 = data (anything)
448 * 4 = data (mode 2 form1)
449 * 5 = data (mode 2 form2)
450 * blksize: 2048 | 2336 | 2340 | 2352
453 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize)
455 struct packet_command cgc;
458 printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
459 cd->cdi.name, lba, format, blksize);
462 memset(&cgc, 0, sizeof(struct packet_command));
463 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
464 cgc.cmd[1] = ((format & 7) << 2);
465 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
466 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
467 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
468 cgc.cmd[5] = (unsigned char) lba & 0xff;
485 cgc.buflen = blksize;
486 cgc.data_direction = DMA_FROM_DEVICE;
487 cgc.timeout = IOCTL_TIMEOUT;
488 return sr_do_ioctl(cd, &cgc);
492 * read sectors with blocksizes other than 2048
495 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
497 struct packet_command cgc;
500 /* we try the READ CD command first... */
501 if (cd->readcd_known) {
502 rc = sr_read_cd(cd, dest, lba, 0, blksize);
503 if (-EDRIVE_CANT_DO_THIS != rc)
505 cd->readcd_known = 0;
506 printk("CDROM does'nt support READ CD (0xbe) command\n");
507 /* fall & retry the other way */
509 /* ... if this fails, we switch the blocksize using MODE SELECT */
510 if (blksize != cd->device->sector_size) {
511 if (0 != (rc = sr_set_blocklength(cd, blksize)))
515 printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
518 memset(&cgc, 0, sizeof(struct packet_command));
519 cgc.cmd[0] = GPCMD_READ_10;
520 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
521 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
522 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
523 cgc.cmd[5] = (unsigned char) lba & 0xff;
526 cgc.buflen = blksize;
527 cgc.data_direction = DMA_FROM_DEVICE;
528 cgc.timeout = IOCTL_TIMEOUT;
529 rc = sr_do_ioctl(cd, &cgc);
535 * read a sector in raw mode to check the sector format
536 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error
539 int sr_is_xa(Scsi_CD *cd)
541 unsigned char *raw_sector;
547 raw_sector = (unsigned char *) kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
550 if (0 == sr_read_sector(cd, cd->ms_offset + 16,
551 CD_FRAMESIZE_RAW1, raw_sector)) {
552 is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
554 /* read a raw sector failed for some reason. */
559 printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
564 int sr_dev_ioctl(struct cdrom_device_info *cdi,
565 unsigned int cmd, unsigned long arg)
567 Scsi_CD *cd = cdi->handle;
570 ret = scsi_nonblockable_ioctl(cd->device, cmd,
571 (void __user *)arg, NULL);
573 * ENODEV means that we didn't recognise the ioctl, or that we
574 * cannot execute it in the current device state. In either
575 * case fall through to scsi_ioctl, which will return ENDOEV again
576 * if it doesn't recognise the ioctl
580 return scsi_ioctl(cd->device, cmd, (void __user *)arg);