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>
11 #include <asm/uaccess.h>
15 #include <scsi/scsi_ioctl.h>
23 /* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
24 * It is off by default and can be turned on with this module parameter */
25 static int xa_test = 0;
27 #define IOCTL_RETRIES 3
29 /* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives
30 are emulating a SCSI device via the idescsi module, they need to have
31 CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
33 static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
35 struct cdrom_tocentry trk0_te, trk1_te;
36 struct cdrom_tochdr tochdr;
37 struct cdrom_generic_command cgc;
40 if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &tochdr)))
43 ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
45 if (ti->cdti_trk1 == ntracks)
46 ti->cdti_trk1 = CDROM_LEADOUT;
47 else if (ti->cdti_trk1 != CDROM_LEADOUT)
50 trk0_te.cdte_track = ti->cdti_trk0;
51 trk0_te.cdte_format = CDROM_MSF;
52 trk1_te.cdte_track = ti->cdti_trk1;
53 trk1_te.cdte_format = CDROM_MSF;
55 if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk0_te)))
57 if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk1_te)))
60 memset(&cgc, 0, sizeof(struct cdrom_generic_command));
61 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
62 cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
63 cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
64 cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
65 cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
66 cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
67 cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
68 cgc.data_direction = SCSI_DATA_NONE;
69 cgc.timeout = IOCTL_TIMEOUT;
70 return sr_do_ioctl(cdi->handle, &cgc);
73 /* We do our own retries because we want to know what the specific
74 error code is. Normally the UNIT_ATTENTION code will automatically
75 clear after one error */
77 int sr_do_ioctl(Scsi_CD *cd, struct cdrom_generic_command *cgc)
79 struct scsi_request *SRpnt;
80 struct scsi_device *SDev;
82 int result, err = 0, retries = 0;
85 SRpnt = scsi_allocate_request(SDev, GFP_KERNEL);
87 printk(KERN_ERR "Unable to allocate SCSI request in sr_do_ioctl");
91 SRpnt->sr_data_direction = cgc->data_direction;
94 if (!scsi_block_when_processing_errors(SDev)) {
99 scsi_wait_req(SRpnt, cgc->cmd, cgc->buffer, cgc->buflen,
100 cgc->timeout, IOCTL_RETRIES);
102 req = SRpnt->sr_request;
103 if (SRpnt->sr_buffer && req->buffer && SRpnt->sr_buffer != req->buffer) {
104 memcpy(req->buffer, SRpnt->sr_buffer, SRpnt->sr_bufflen);
105 kfree(SRpnt->sr_buffer);
106 SRpnt->sr_buffer = req->buffer;
109 result = SRpnt->sr_result;
111 /* Minimal error checking. Ignore cases we know about, and report the rest. */
112 if (driver_byte(result) != 0) {
113 switch (SRpnt->sr_sense_buffer[2] & 0xf) {
117 printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
122 case NOT_READY: /* This happens if there is no disc in drive */
123 if (SRpnt->sr_sense_buffer[12] == 0x04 &&
124 SRpnt->sr_sense_buffer[13] == 0x01) {
125 /* sense: Logical unit is in process of becoming ready */
127 printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
128 if (retries++ < 10) {
129 /* sleep 2 sec and try again */
133 /* 20 secs are enough? */
139 printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name);
141 print_req_sense("sr", SRpnt);
145 case ILLEGAL_REQUEST:
147 if (SRpnt->sr_sense_buffer[12] == 0x20 &&
148 SRpnt->sr_sense_buffer[13] == 0x00)
149 /* sense: Invalid command operation code */
150 err = -EDRIVE_CANT_DO_THIS;
152 print_command(cgc->cmd);
153 print_req_sense("sr", SRpnt);
157 printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
158 print_command(cgc->cmd);
159 print_req_sense("sr", SRpnt);
165 memcpy(cgc->sense, SRpnt->sr_sense_buffer, sizeof(*cgc->sense));
167 /* Wake up a process waiting for device */
169 scsi_release_request(SRpnt);
176 /* ---------------------------------------------------------------------- */
177 /* interface to cdrom.c */
179 static int test_unit_ready(Scsi_CD *cd)
181 struct cdrom_generic_command cgc;
183 memset(&cgc, 0, sizeof(struct cdrom_generic_command));
184 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
186 cgc.data_direction = SCSI_DATA_NONE;
187 cgc.timeout = IOCTL_TIMEOUT;
188 return sr_do_ioctl(cd, &cgc);
191 int sr_tray_move(struct cdrom_device_info *cdi, int pos)
193 Scsi_CD *cd = cdi->handle;
194 struct cdrom_generic_command cgc;
196 memset(&cgc, 0, sizeof(struct cdrom_generic_command));
197 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
198 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
199 cgc.data_direction = SCSI_DATA_NONE;
200 cgc.timeout = IOCTL_TIMEOUT;
201 return sr_do_ioctl(cd, &cgc);
204 int sr_lock_door(struct cdrom_device_info *cdi, int lock)
206 Scsi_CD *cd = cdi->handle;
208 return scsi_set_medium_removal(cd->device, lock ?
209 SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
212 int sr_drive_status(struct cdrom_device_info *cdi, int slot)
214 if (CDSL_CURRENT != slot) {
215 /* we have no changer support */
218 if (0 == test_unit_ready(cdi->handle))
221 return CDS_TRAY_OPEN;
224 int sr_disk_status(struct cdrom_device_info *cdi)
226 Scsi_CD *cd = cdi->handle;
227 struct cdrom_tochdr toc_h;
228 struct cdrom_tocentry toc_e;
229 int i, rc, have_datatracks = 0;
231 /* look for data tracks */
232 if (0 != (rc = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &toc_h)))
233 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
235 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
236 toc_e.cdte_track = i;
237 toc_e.cdte_format = CDROM_LBA;
238 if (sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &toc_e))
240 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
245 if (!have_datatracks)
254 int sr_get_last_session(struct cdrom_device_info *cdi,
255 struct cdrom_multisession *ms_info)
257 Scsi_CD *cd = cdi->handle;
259 ms_info->addr.lba = cd->ms_offset;
260 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;
265 /* primitive to determine whether we need to have GFP_DMA set based on
266 * the status of the unchecked_isa_dma flag in the host structure */
267 #define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
269 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
271 Scsi_CD *cd = cdi->handle;
272 struct cdrom_generic_command cgc;
273 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
276 memset(&cgc, 0, sizeof(struct cdrom_generic_command));
277 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
278 cgc.cmd[2] = 0x40; /* I do want the subchannel info */
279 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */
283 cgc.data_direction = SCSI_DATA_READ;
284 cgc.timeout = IOCTL_TIMEOUT;
285 result = sr_do_ioctl(cd, &cgc);
287 memcpy(mcn->medium_catalog_number, buffer + 9, 13);
288 mcn->medium_catalog_number[13] = 0;
294 int sr_reset(struct cdrom_device_info *cdi)
299 int sr_select_speed(struct cdrom_device_info *cdi, int speed)
301 Scsi_CD *cd = cdi->handle;
302 struct cdrom_generic_command cgc;
305 speed = 0xffff; /* set to max */
307 speed *= 177; /* Nx to kbyte/s */
309 memset(&cgc, 0, sizeof(struct cdrom_generic_command));
310 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
311 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
312 cgc.cmd[3] = speed & 0xff; /* LSB */
313 cgc.data_direction = SCSI_DATA_NONE;
314 cgc.timeout = IOCTL_TIMEOUT;
316 if (sr_do_ioctl(cd, &cgc))
321 /* ----------------------------------------------------------------------- */
322 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
323 /* because the generic cdrom driver does the user access stuff for us. */
324 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
325 /* sr_disk_status interface for the generic cdrom driver. */
327 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
329 Scsi_CD *cd = cdi->handle;
330 struct cdrom_generic_command cgc;
332 unsigned char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
334 memset(&cgc, 0, sizeof(struct cdrom_generic_command));
335 cgc.timeout = IOCTL_TIMEOUT;
338 case CDROMREADTOCHDR:
340 struct cdrom_tochdr *tochdr = (struct cdrom_tochdr *) arg;
342 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
343 cgc.cmd[8] = 12; /* LSB of length */
347 cgc.data_direction = SCSI_DATA_READ;
349 result = sr_do_ioctl(cd, &cgc);
351 tochdr->cdth_trk0 = buffer[2];
352 tochdr->cdth_trk1 = buffer[3];
357 case CDROMREADTOCENTRY:
359 struct cdrom_tocentry *tocentry = (struct cdrom_tocentry *) arg;
361 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
362 cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
363 cgc.cmd[6] = tocentry->cdte_track;
364 cgc.cmd[8] = 12; /* LSB of length */
367 cgc.data_direction = SCSI_DATA_READ;
369 result = sr_do_ioctl(cd, &cgc);
371 tocentry->cdte_ctrl = buffer[5] & 0xf;
372 tocentry->cdte_adr = buffer[5] >> 4;
373 tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
374 if (tocentry->cdte_format == CDROM_MSF) {
375 tocentry->cdte_addr.msf.minute = buffer[9];
376 tocentry->cdte_addr.msf.second = buffer[10];
377 tocentry->cdte_addr.msf.frame = buffer[11];
379 tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
380 + buffer[10]) << 8) + buffer[11];
385 case CDROMPLAYTRKIND: {
386 struct cdrom_ti* ti = (struct cdrom_ti*)arg;
388 cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
389 cgc.cmd[4] = ti->cdti_trk0;
390 cgc.cmd[5] = ti->cdti_ind0;
391 cgc.cmd[7] = ti->cdti_trk1;
392 cgc.cmd[8] = ti->cdti_ind1;
393 cgc.data_direction = SCSI_DATA_NONE;
395 result = sr_do_ioctl(cd, &cgc);
396 if (result == -EDRIVE_CANT_DO_THIS)
397 result = sr_fake_playtrkind(cdi, ti);
408 printk("DEBUG: sr_audio: result for ioctl %x: %x\n", cmd, result);
415 /* -----------------------------------------------------------------------
416 * a function to read all sorts of funny cdrom sectors using the READ_CD
419 * lba: linear block address
420 * format: 0 = data (anything)
424 * 4 = data (mode 2 form1)
425 * 5 = data (mode 2 form2)
426 * blksize: 2048 | 2336 | 2340 | 2352
429 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize)
431 struct cdrom_generic_command cgc;
434 printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
435 cd->cdi.name, lba, format, blksize);
438 memset(&cgc, 0, sizeof(struct cdrom_generic_command));
439 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
440 cgc.cmd[1] = ((format & 7) << 2);
441 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
442 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
443 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
444 cgc.cmd[5] = (unsigned char) lba & 0xff;
461 cgc.buflen = blksize;
462 cgc.data_direction = SCSI_DATA_READ;
463 cgc.timeout = IOCTL_TIMEOUT;
464 return sr_do_ioctl(cd, &cgc);
468 * read sectors with blocksizes other than 2048
471 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
473 struct cdrom_generic_command cgc;
476 /* we try the READ CD command first... */
477 if (cd->readcd_known) {
478 rc = sr_read_cd(cd, dest, lba, 0, blksize);
479 if (-EDRIVE_CANT_DO_THIS != rc)
481 cd->readcd_known = 0;
482 printk("CDROM does'nt support READ CD (0xbe) command\n");
483 /* fall & retry the other way */
485 /* ... if this fails, we switch the blocksize using MODE SELECT */
486 if (blksize != cd->device->sector_size) {
487 if (0 != (rc = sr_set_blocklength(cd, blksize)))
491 printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
494 memset(&cgc, 0, sizeof(struct cdrom_generic_command));
495 cgc.cmd[0] = GPCMD_READ_10;
496 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
497 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
498 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
499 cgc.cmd[5] = (unsigned char) lba & 0xff;
502 cgc.buflen = blksize;
503 cgc.data_direction = SCSI_DATA_READ;
504 cgc.timeout = IOCTL_TIMEOUT;
505 rc = sr_do_ioctl(cd, &cgc);
511 * read a sector in raw mode to check the sector format
512 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error
515 int sr_is_xa(Scsi_CD *cd)
517 unsigned char *raw_sector;
523 raw_sector = (unsigned char *) kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
526 if (0 == sr_read_sector(cd, cd->ms_offset + 16,
527 CD_FRAMESIZE_RAW1, raw_sector)) {
528 is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
530 /* read a raw sector failed for some reason. */
535 printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
540 int sr_dev_ioctl(struct cdrom_device_info *cdi,
541 unsigned int cmd, unsigned long arg)
543 Scsi_CD *cd = cdi->handle;
544 return scsi_ioctl(cd->device, cmd, (void *)arg);