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 = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
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 */
58 cgc.data_direction = DMA_FROM_DEVICE;
60 result = sr_do_ioctl(cd, &cgc);
62 tochdr->cdth_trk0 = buffer[2];
63 tochdr->cdth_trk1 = buffer[3];
69 static int sr_read_tocentry(struct cdrom_device_info *cdi,
70 struct cdrom_tocentry *tocentry)
72 struct scsi_cd *cd = cdi->handle;
73 struct packet_command cgc;
75 unsigned char *buffer;
77 buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
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 */
89 cgc.data_direction = DMA_FROM_DEVICE;
91 result = sr_do_ioctl(cd, &cgc);
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];
101 tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
102 + buffer[10]) << 8) + buffer[11];
108 #define IOCTL_RETRIES 3
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 */
114 static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
116 struct cdrom_tocentry trk0_te, trk1_te;
117 struct cdrom_tochdr tochdr;
118 struct packet_command cgc;
121 ret = sr_read_tochdr(cdi, &tochdr);
125 ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
127 if (ti->cdti_trk1 == ntracks)
128 ti->cdti_trk1 = CDROM_LEADOUT;
129 else if (ti->cdti_trk1 != CDROM_LEADOUT)
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;
137 ret = sr_read_tocentry(cdi, &trk0_te);
140 ret = sr_read_tocentry(cdi, &trk1_te);
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);
157 static int sr_play_trkind(struct cdrom_device_info *cdi,
161 struct scsi_cd *cd = cdi->handle;
162 struct packet_command cgc;
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;
174 result = sr_do_ioctl(cd, &cgc);
175 if (result == -EDRIVE_CANT_DO_THIS)
176 result = sr_fake_playtrkind(cdi, ti);
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 */
185 int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
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;
195 sense = kmalloc(sizeof(*sense), GFP_KERNEL);
203 if (!scsi_block_when_processing_errors(SDev)) {
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);
213 scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr);
215 /* Minimal error checking. Ignore cases we know about, and report the rest. */
216 if (driver_byte(result) != 0) {
217 switch (sshdr.sense_key) {
221 printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
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 */
231 printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
232 if (retries++ < 10) {
233 /* sleep 2 sec and try again */
237 /* 20 secs are enough? */
243 printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name);
245 scsi_print_sense_hdr("sr", &sshdr);
249 case ILLEGAL_REQUEST:
251 if (sshdr.asc == 0x20 &&
253 /* sense: Invalid command operation code */
254 err = -EDRIVE_CANT_DO_THIS;
256 __scsi_print_command(cgc->cmd);
257 scsi_print_sense_hdr("sr", &sshdr);
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);
268 /* Wake up a process waiting for device */
276 /* ---------------------------------------------------------------------- */
277 /* interface to cdrom.c */
279 static int test_unit_ready(Scsi_CD *cd)
281 struct packet_command cgc;
283 memset(&cgc, 0, sizeof(struct packet_command));
284 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
286 cgc.data_direction = DMA_NONE;
287 cgc.timeout = IOCTL_TIMEOUT;
288 return sr_do_ioctl(cd, &cgc);
291 int sr_tray_move(struct cdrom_device_info *cdi, int pos)
293 Scsi_CD *cd = cdi->handle;
294 struct packet_command cgc;
296 memset(&cgc, 0, sizeof(struct packet_command));
297 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
298 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
299 cgc.data_direction = DMA_NONE;
300 cgc.timeout = IOCTL_TIMEOUT;
301 return sr_do_ioctl(cd, &cgc);
304 int sr_lock_door(struct cdrom_device_info *cdi, int lock)
306 Scsi_CD *cd = cdi->handle;
308 return scsi_set_medium_removal(cd->device, lock ?
309 SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
312 int sr_drive_status(struct cdrom_device_info *cdi, int slot)
314 if (CDSL_CURRENT != slot) {
315 /* we have no changer support */
318 if (0 == test_unit_ready(cdi->handle))
321 return CDS_TRAY_OPEN;
324 int sr_disk_status(struct cdrom_device_info *cdi)
326 Scsi_CD *cd = cdi->handle;
327 struct cdrom_tochdr toc_h;
328 struct cdrom_tocentry toc_e;
329 int i, rc, have_datatracks = 0;
331 /* look for data tracks */
332 rc = sr_read_tochdr(cdi, &toc_h);
334 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
336 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
337 toc_e.cdte_track = i;
338 toc_e.cdte_format = CDROM_LBA;
339 if (sr_read_tocentry(cdi, &toc_e))
341 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
346 if (!have_datatracks)
355 int sr_get_last_session(struct cdrom_device_info *cdi,
356 struct cdrom_multisession *ms_info)
358 Scsi_CD *cd = cdi->handle;
360 ms_info->addr.lba = cd->ms_offset;
361 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;
366 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
368 Scsi_CD *cd = cdi->handle;
369 struct packet_command cgc;
370 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
376 memset(&cgc, 0, sizeof(struct packet_command));
377 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
378 cgc.cmd[2] = 0x40; /* I do want the subchannel info */
379 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */
383 cgc.data_direction = DMA_FROM_DEVICE;
384 cgc.timeout = IOCTL_TIMEOUT;
385 result = sr_do_ioctl(cd, &cgc);
387 memcpy(mcn->medium_catalog_number, buffer + 9, 13);
388 mcn->medium_catalog_number[13] = 0;
394 int sr_reset(struct cdrom_device_info *cdi)
399 int sr_select_speed(struct cdrom_device_info *cdi, int speed)
401 Scsi_CD *cd = cdi->handle;
402 struct packet_command cgc;
405 speed = 0xffff; /* set to max */
407 speed *= 177; /* Nx to kbyte/s */
409 memset(&cgc, 0, sizeof(struct packet_command));
410 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
411 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
412 cgc.cmd[3] = speed & 0xff; /* LSB */
413 cgc.data_direction = DMA_NONE;
414 cgc.timeout = IOCTL_TIMEOUT;
416 if (sr_do_ioctl(cd, &cgc))
421 /* ----------------------------------------------------------------------- */
422 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
423 /* because the generic cdrom driver does the user access stuff for us. */
424 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
425 /* sr_disk_status interface for the generic cdrom driver. */
427 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
430 case CDROMREADTOCHDR:
431 return sr_read_tochdr(cdi, arg);
432 case CDROMREADTOCENTRY:
433 return sr_read_tocentry(cdi, arg);
434 case CDROMPLAYTRKIND:
435 return sr_play_trkind(cdi, arg);
441 /* -----------------------------------------------------------------------
442 * a function to read all sorts of funny cdrom sectors using the READ_CD
445 * lba: linear block address
446 * format: 0 = data (anything)
450 * 4 = data (mode 2 form1)
451 * 5 = data (mode 2 form2)
452 * blksize: 2048 | 2336 | 2340 | 2352
455 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize)
457 struct packet_command cgc;
460 printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
461 cd->cdi.name, lba, format, blksize);
464 memset(&cgc, 0, sizeof(struct packet_command));
465 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
466 cgc.cmd[1] = ((format & 7) << 2);
467 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
468 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
469 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
470 cgc.cmd[5] = (unsigned char) lba & 0xff;
487 cgc.buflen = blksize;
488 cgc.data_direction = DMA_FROM_DEVICE;
489 cgc.timeout = IOCTL_TIMEOUT;
490 return sr_do_ioctl(cd, &cgc);
494 * read sectors with blocksizes other than 2048
497 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
499 struct packet_command cgc;
502 /* we try the READ CD command first... */
503 if (cd->readcd_known) {
504 rc = sr_read_cd(cd, dest, lba, 0, blksize);
505 if (-EDRIVE_CANT_DO_THIS != rc)
507 cd->readcd_known = 0;
508 printk("CDROM does'nt support READ CD (0xbe) command\n");
509 /* fall & retry the other way */
511 /* ... if this fails, we switch the blocksize using MODE SELECT */
512 if (blksize != cd->device->sector_size) {
513 if (0 != (rc = sr_set_blocklength(cd, blksize)))
517 printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
520 memset(&cgc, 0, sizeof(struct packet_command));
521 cgc.cmd[0] = GPCMD_READ_10;
522 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
523 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
524 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
525 cgc.cmd[5] = (unsigned char) lba & 0xff;
528 cgc.buflen = blksize;
529 cgc.data_direction = DMA_FROM_DEVICE;
530 cgc.timeout = IOCTL_TIMEOUT;
531 rc = sr_do_ioctl(cd, &cgc);
537 * read a sector in raw mode to check the sector format
538 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error
541 int sr_is_xa(Scsi_CD *cd)
543 unsigned char *raw_sector;
549 raw_sector = (unsigned char *) kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
552 if (0 == sr_read_sector(cd, cd->ms_offset + 16,
553 CD_FRAMESIZE_RAW1, raw_sector)) {
554 is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
556 /* read a raw sector failed for some reason. */
561 printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
566 int sr_dev_ioctl(struct cdrom_device_info *cdi,
567 unsigned int cmd, unsigned long arg)
569 Scsi_CD *cd = cdi->handle;
572 ret = scsi_nonblockable_ioctl(cd->device, cmd,
573 (void __user *)arg, NULL);
575 * ENODEV means that we didn't recognise the ioctl, or that we
576 * cannot execute it in the current device state. In either
577 * case fall through to scsi_ioctl, which will return ENDOEV again
578 * if it doesn't recognise the ioctl
582 return scsi_ioctl(cd->device, cmd, (void __user *)arg);