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/module.h> 8 #include <linux/blkpg.h> 9 #include <linux/cdrom.h> 10 #include <linux/delay.h> 11 #include <linux/slab.h> 12 #include <asm/io.h> 13 #include <asm/uaccess.h> 14 15 #include <scsi/scsi.h> 16 #include <scsi/scsi_dbg.h> 17 #include <scsi/scsi_device.h> 18 #include <scsi/scsi_eh.h> 19 #include <scsi/scsi_host.h> 20 #include <scsi/scsi_ioctl.h> 21 #include <scsi/scsi_cmnd.h> 22 23 #include "sr.h" 24 25 #if 0 26 #define DEBUG 27 #endif 28 29 /* The sr_is_xa() seems to trigger firmware bugs with some drives :-( 30 * It is off by default and can be turned on with this module parameter */ 31 static int xa_test = 0; 32 33 module_param(xa_test, int, S_IRUGO | S_IWUSR); 34 35 /* primitive to determine whether we need to have GFP_DMA set based on 36 * the status of the unchecked_isa_dma flag in the host structure */ 37 #define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0) 38 39 static 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 69 static 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 } 107 108 #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 */ 113 114 static 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; 120 121 ret = sr_read_tochdr(cdi, &tochdr); 122 if (ret) 123 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; 136 137 ret = sr_read_tocentry(cdi, &trk0_te); 138 if (ret) 139 return ret; 140 ret = sr_read_tocentry(cdi, &trk1_te); 141 if (ret) 142 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 } 156 157 static 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 } 180 181 /* 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 */ 184 185 int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc) 186 { 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; 191 192 SDev = cd->device; 193 194 if (!sense) { 195 sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL); 196 if (!sense) { 197 err = -ENOMEM; 198 goto out; 199 } 200 } 201 202 retry: 203 if (!scsi_block_when_processing_errors(SDev)) { 204 err = -ENODEV; 205 goto out; 206 } 207 208 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, NULL); 212 213 scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr); 214 215 /* Minimal error checking. Ignore cases we know about, and report the rest. */ 216 if (driver_byte(result) != 0) { 217 switch (sshdr.sense_key) { 218 case UNIT_ATTENTION: 219 SDev->changed = 1; 220 if (!cgc->quiet) 221 sr_printk(KERN_INFO, cd, 222 "disc change detected.\n"); 223 if (retries++ < 10) 224 goto retry; 225 err = -ENOMEDIUM; 226 break; 227 case NOT_READY: /* This happens if there is no disc in drive */ 228 if (sshdr.asc == 0x04 && 229 sshdr.ascq == 0x01) { 230 /* sense: Logical unit is in process of becoming ready */ 231 if (!cgc->quiet) 232 sr_printk(KERN_INFO, cd, 233 "CDROM not ready yet.\n"); 234 if (retries++ < 10) { 235 /* sleep 2 sec and try again */ 236 ssleep(2); 237 goto retry; 238 } else { 239 /* 20 secs are enough? */ 240 err = -ENOMEDIUM; 241 break; 242 } 243 } 244 if (!cgc->quiet) 245 sr_printk(KERN_INFO, cd, 246 "CDROM not ready. Make sure there " 247 "is a disc in the drive.\n"); 248 #ifdef DEBUG 249 scsi_print_sense_hdr("sr", &sshdr); 250 #endif 251 err = -ENOMEDIUM; 252 break; 253 case ILLEGAL_REQUEST: 254 err = -EIO; 255 if (sshdr.asc == 0x20 && 256 sshdr.ascq == 0x00) 257 /* sense: Invalid command operation code */ 258 err = -EDRIVE_CANT_DO_THIS; 259 #ifdef DEBUG 260 __scsi_print_command(cgc->cmd); 261 scsi_print_sense_hdr("sr", &sshdr); 262 #endif 263 break; 264 default: 265 sr_printk(KERN_ERR, cd, 266 "CDROM (ioctl) error, command: "); 267 __scsi_print_command(cgc->cmd); 268 scsi_print_sense_hdr("sr", &sshdr); 269 err = -EIO; 270 } 271 } 272 273 /* Wake up a process waiting for device */ 274 out: 275 if (!cgc->sense) 276 kfree(sense); 277 cgc->stat = err; 278 return err; 279 } 280 281 /* ---------------------------------------------------------------------- */ 282 /* interface to cdrom.c */ 283 284 int sr_tray_move(struct cdrom_device_info *cdi, int pos) 285 { 286 Scsi_CD *cd = cdi->handle; 287 struct packet_command cgc; 288 289 memset(&cgc, 0, sizeof(struct packet_command)); 290 cgc.cmd[0] = GPCMD_START_STOP_UNIT; 291 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ; 292 cgc.data_direction = DMA_NONE; 293 cgc.timeout = IOCTL_TIMEOUT; 294 return sr_do_ioctl(cd, &cgc); 295 } 296 297 int sr_lock_door(struct cdrom_device_info *cdi, int lock) 298 { 299 Scsi_CD *cd = cdi->handle; 300 301 return scsi_set_medium_removal(cd->device, lock ? 302 SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); 303 } 304 305 int sr_drive_status(struct cdrom_device_info *cdi, int slot) 306 { 307 struct scsi_cd *cd = cdi->handle; 308 struct scsi_sense_hdr sshdr; 309 struct media_event_desc med; 310 311 if (CDSL_CURRENT != slot) { 312 /* we have no changer support */ 313 return -EINVAL; 314 } 315 if (!scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr)) 316 return CDS_DISC_OK; 317 318 /* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */ 319 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY 320 && sshdr.asc == 0x04 && sshdr.ascq == 0x01) 321 return CDS_DRIVE_NOT_READY; 322 323 if (!cdrom_get_media_event(cdi, &med)) { 324 if (med.media_present) 325 return CDS_DISC_OK; 326 else if (med.door_open) 327 return CDS_TRAY_OPEN; 328 else 329 return CDS_NO_DISC; 330 } 331 332 /* 333 * SK/ASC/ASCQ of 2/4/2 means "initialization required" 334 * Using CD_TRAY_OPEN results in an START_STOP_UNIT to close 335 * the tray, which resolves the initialization requirement. 336 */ 337 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY 338 && sshdr.asc == 0x04 && sshdr.ascq == 0x02) 339 return CDS_TRAY_OPEN; 340 341 /* 342 * 0x04 is format in progress .. but there must be a disc present! 343 */ 344 if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04) 345 return CDS_DISC_OK; 346 347 /* 348 * If not using Mt Fuji extended media tray reports, 349 * just return TRAY_OPEN since ATAPI doesn't provide 350 * any other way to detect this... 351 */ 352 if (scsi_sense_valid(&sshdr) && 353 /* 0x3a is medium not present */ 354 sshdr.asc == 0x3a) 355 return CDS_NO_DISC; 356 else 357 return CDS_TRAY_OPEN; 358 359 return CDS_DRIVE_NOT_READY; 360 } 361 362 int sr_disk_status(struct cdrom_device_info *cdi) 363 { 364 Scsi_CD *cd = cdi->handle; 365 struct cdrom_tochdr toc_h; 366 struct cdrom_tocentry toc_e; 367 int i, rc, have_datatracks = 0; 368 369 /* look for data tracks */ 370 rc = sr_read_tochdr(cdi, &toc_h); 371 if (rc) 372 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO; 373 374 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) { 375 toc_e.cdte_track = i; 376 toc_e.cdte_format = CDROM_LBA; 377 if (sr_read_tocentry(cdi, &toc_e)) 378 return CDS_NO_INFO; 379 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) { 380 have_datatracks = 1; 381 break; 382 } 383 } 384 if (!have_datatracks) 385 return CDS_AUDIO; 386 387 if (cd->xa_flag) 388 return CDS_XA_2_1; 389 else 390 return CDS_DATA_1; 391 } 392 393 int sr_get_last_session(struct cdrom_device_info *cdi, 394 struct cdrom_multisession *ms_info) 395 { 396 Scsi_CD *cd = cdi->handle; 397 398 ms_info->addr.lba = cd->ms_offset; 399 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0; 400 401 return 0; 402 } 403 404 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) 405 { 406 Scsi_CD *cd = cdi->handle; 407 struct packet_command cgc; 408 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 409 int result; 410 411 if (!buffer) 412 return -ENOMEM; 413 414 memset(&cgc, 0, sizeof(struct packet_command)); 415 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 416 cgc.cmd[2] = 0x40; /* I do want the subchannel info */ 417 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */ 418 cgc.cmd[8] = 24; 419 cgc.buffer = buffer; 420 cgc.buflen = 24; 421 cgc.data_direction = DMA_FROM_DEVICE; 422 cgc.timeout = IOCTL_TIMEOUT; 423 result = sr_do_ioctl(cd, &cgc); 424 425 memcpy(mcn->medium_catalog_number, buffer + 9, 13); 426 mcn->medium_catalog_number[13] = 0; 427 428 kfree(buffer); 429 return result; 430 } 431 432 int sr_reset(struct cdrom_device_info *cdi) 433 { 434 return 0; 435 } 436 437 int sr_select_speed(struct cdrom_device_info *cdi, int speed) 438 { 439 Scsi_CD *cd = cdi->handle; 440 struct packet_command cgc; 441 442 if (speed == 0) 443 speed = 0xffff; /* set to max */ 444 else 445 speed *= 177; /* Nx to kbyte/s */ 446 447 memset(&cgc, 0, sizeof(struct packet_command)); 448 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */ 449 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */ 450 cgc.cmd[3] = speed & 0xff; /* LSB */ 451 cgc.data_direction = DMA_NONE; 452 cgc.timeout = IOCTL_TIMEOUT; 453 454 if (sr_do_ioctl(cd, &cgc)) 455 return -EIO; 456 return 0; 457 } 458 459 /* ----------------------------------------------------------------------- */ 460 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */ 461 /* because the generic cdrom driver does the user access stuff for us. */ 462 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */ 463 /* sr_disk_status interface for the generic cdrom driver. */ 464 465 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) 466 { 467 switch (cmd) { 468 case CDROMREADTOCHDR: 469 return sr_read_tochdr(cdi, arg); 470 case CDROMREADTOCENTRY: 471 return sr_read_tocentry(cdi, arg); 472 case CDROMPLAYTRKIND: 473 return sr_play_trkind(cdi, arg); 474 default: 475 return -EINVAL; 476 } 477 } 478 479 /* ----------------------------------------------------------------------- 480 * a function to read all sorts of funny cdrom sectors using the READ_CD 481 * scsi-3 mmc command 482 * 483 * lba: linear block address 484 * format: 0 = data (anything) 485 * 1 = audio 486 * 2 = data (mode 1) 487 * 3 = data (mode 2) 488 * 4 = data (mode 2 form1) 489 * 5 = data (mode 2 form2) 490 * blksize: 2048 | 2336 | 2340 | 2352 491 */ 492 493 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize) 494 { 495 struct packet_command cgc; 496 497 #ifdef DEBUG 498 sr_printk(KERN_INFO, cd, "sr_read_cd lba=%d format=%d blksize=%d\n", 499 lba, format, blksize); 500 #endif 501 502 memset(&cgc, 0, sizeof(struct packet_command)); 503 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */ 504 cgc.cmd[1] = ((format & 7) << 2); 505 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 506 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 507 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 508 cgc.cmd[5] = (unsigned char) lba & 0xff; 509 cgc.cmd[8] = 1; 510 switch (blksize) { 511 case 2336: 512 cgc.cmd[9] = 0x58; 513 break; 514 case 2340: 515 cgc.cmd[9] = 0x78; 516 break; 517 case 2352: 518 cgc.cmd[9] = 0xf8; 519 break; 520 default: 521 cgc.cmd[9] = 0x10; 522 break; 523 } 524 cgc.buffer = dest; 525 cgc.buflen = blksize; 526 cgc.data_direction = DMA_FROM_DEVICE; 527 cgc.timeout = IOCTL_TIMEOUT; 528 return sr_do_ioctl(cd, &cgc); 529 } 530 531 /* 532 * read sectors with blocksizes other than 2048 533 */ 534 535 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest) 536 { 537 struct packet_command cgc; 538 int rc; 539 540 /* we try the READ CD command first... */ 541 if (cd->readcd_known) { 542 rc = sr_read_cd(cd, dest, lba, 0, blksize); 543 if (-EDRIVE_CANT_DO_THIS != rc) 544 return rc; 545 cd->readcd_known = 0; 546 sr_printk(KERN_INFO, cd, 547 "CDROM does'nt support READ CD (0xbe) command\n"); 548 /* fall & retry the other way */ 549 } 550 /* ... if this fails, we switch the blocksize using MODE SELECT */ 551 if (blksize != cd->device->sector_size) { 552 if (0 != (rc = sr_set_blocklength(cd, blksize))) 553 return rc; 554 } 555 #ifdef DEBUG 556 sr_printk(KERN_INFO, cd, "sr_read_sector lba=%d blksize=%d\n", 557 lba, blksize); 558 #endif 559 560 memset(&cgc, 0, sizeof(struct packet_command)); 561 cgc.cmd[0] = GPCMD_READ_10; 562 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 563 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 564 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 565 cgc.cmd[5] = (unsigned char) lba & 0xff; 566 cgc.cmd[8] = 1; 567 cgc.buffer = dest; 568 cgc.buflen = blksize; 569 cgc.data_direction = DMA_FROM_DEVICE; 570 cgc.timeout = IOCTL_TIMEOUT; 571 rc = sr_do_ioctl(cd, &cgc); 572 573 return rc; 574 } 575 576 /* 577 * read a sector in raw mode to check the sector format 578 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 579 */ 580 581 int sr_is_xa(Scsi_CD *cd) 582 { 583 unsigned char *raw_sector; 584 int is_xa; 585 586 if (!xa_test) 587 return 0; 588 589 raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd)); 590 if (!raw_sector) 591 return -ENOMEM; 592 if (0 == sr_read_sector(cd, cd->ms_offset + 16, 593 CD_FRAMESIZE_RAW1, raw_sector)) { 594 is_xa = (raw_sector[3] == 0x02) ? 1 : 0; 595 } else { 596 /* read a raw sector failed for some reason. */ 597 is_xa = -1; 598 } 599 kfree(raw_sector); 600 #ifdef DEBUG 601 sr_printk(KERN_INFO, cd, "sr_is_xa: %d\n", is_xa); 602 #endif 603 return is_xa; 604 } 605