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 <linux/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 err = -ENOMEDIUM; 249 break; 250 case ILLEGAL_REQUEST: 251 err = -EIO; 252 if (sshdr.asc == 0x20 && 253 sshdr.ascq == 0x00) 254 /* sense: Invalid command operation code */ 255 err = -EDRIVE_CANT_DO_THIS; 256 break; 257 default: 258 err = -EIO; 259 } 260 } 261 262 /* Wake up a process waiting for device */ 263 out: 264 if (!cgc->sense) 265 kfree(sense); 266 cgc->stat = err; 267 return err; 268 } 269 270 /* ---------------------------------------------------------------------- */ 271 /* interface to cdrom.c */ 272 273 int sr_tray_move(struct cdrom_device_info *cdi, int pos) 274 { 275 Scsi_CD *cd = cdi->handle; 276 struct packet_command cgc; 277 278 memset(&cgc, 0, sizeof(struct packet_command)); 279 cgc.cmd[0] = GPCMD_START_STOP_UNIT; 280 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ; 281 cgc.data_direction = DMA_NONE; 282 cgc.timeout = IOCTL_TIMEOUT; 283 return sr_do_ioctl(cd, &cgc); 284 } 285 286 int sr_lock_door(struct cdrom_device_info *cdi, int lock) 287 { 288 Scsi_CD *cd = cdi->handle; 289 290 return scsi_set_medium_removal(cd->device, lock ? 291 SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); 292 } 293 294 int sr_drive_status(struct cdrom_device_info *cdi, int slot) 295 { 296 struct scsi_cd *cd = cdi->handle; 297 struct scsi_sense_hdr sshdr; 298 struct media_event_desc med; 299 300 if (CDSL_CURRENT != slot) { 301 /* we have no changer support */ 302 return -EINVAL; 303 } 304 if (!scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr)) 305 return CDS_DISC_OK; 306 307 /* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */ 308 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY 309 && sshdr.asc == 0x04 && sshdr.ascq == 0x01) 310 return CDS_DRIVE_NOT_READY; 311 312 if (!cdrom_get_media_event(cdi, &med)) { 313 if (med.media_present) 314 return CDS_DISC_OK; 315 else if (med.door_open) 316 return CDS_TRAY_OPEN; 317 else 318 return CDS_NO_DISC; 319 } 320 321 /* 322 * SK/ASC/ASCQ of 2/4/2 means "initialization required" 323 * Using CD_TRAY_OPEN results in an START_STOP_UNIT to close 324 * the tray, which resolves the initialization requirement. 325 */ 326 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY 327 && sshdr.asc == 0x04 && sshdr.ascq == 0x02) 328 return CDS_TRAY_OPEN; 329 330 /* 331 * 0x04 is format in progress .. but there must be a disc present! 332 */ 333 if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04) 334 return CDS_DISC_OK; 335 336 /* 337 * If not using Mt Fuji extended media tray reports, 338 * just return TRAY_OPEN since ATAPI doesn't provide 339 * any other way to detect this... 340 */ 341 if (scsi_sense_valid(&sshdr) && 342 /* 0x3a is medium not present */ 343 sshdr.asc == 0x3a) 344 return CDS_NO_DISC; 345 else 346 return CDS_TRAY_OPEN; 347 348 return CDS_DRIVE_NOT_READY; 349 } 350 351 int sr_disk_status(struct cdrom_device_info *cdi) 352 { 353 Scsi_CD *cd = cdi->handle; 354 struct cdrom_tochdr toc_h; 355 struct cdrom_tocentry toc_e; 356 int i, rc, have_datatracks = 0; 357 358 /* look for data tracks */ 359 rc = sr_read_tochdr(cdi, &toc_h); 360 if (rc) 361 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO; 362 363 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) { 364 toc_e.cdte_track = i; 365 toc_e.cdte_format = CDROM_LBA; 366 if (sr_read_tocentry(cdi, &toc_e)) 367 return CDS_NO_INFO; 368 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) { 369 have_datatracks = 1; 370 break; 371 } 372 } 373 if (!have_datatracks) 374 return CDS_AUDIO; 375 376 if (cd->xa_flag) 377 return CDS_XA_2_1; 378 else 379 return CDS_DATA_1; 380 } 381 382 int sr_get_last_session(struct cdrom_device_info *cdi, 383 struct cdrom_multisession *ms_info) 384 { 385 Scsi_CD *cd = cdi->handle; 386 387 ms_info->addr.lba = cd->ms_offset; 388 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0; 389 390 return 0; 391 } 392 393 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) 394 { 395 Scsi_CD *cd = cdi->handle; 396 struct packet_command cgc; 397 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 398 int result; 399 400 if (!buffer) 401 return -ENOMEM; 402 403 memset(&cgc, 0, sizeof(struct packet_command)); 404 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 405 cgc.cmd[2] = 0x40; /* I do want the subchannel info */ 406 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */ 407 cgc.cmd[8] = 24; 408 cgc.buffer = buffer; 409 cgc.buflen = 24; 410 cgc.data_direction = DMA_FROM_DEVICE; 411 cgc.timeout = IOCTL_TIMEOUT; 412 result = sr_do_ioctl(cd, &cgc); 413 414 memcpy(mcn->medium_catalog_number, buffer + 9, 13); 415 mcn->medium_catalog_number[13] = 0; 416 417 kfree(buffer); 418 return result; 419 } 420 421 int sr_reset(struct cdrom_device_info *cdi) 422 { 423 return 0; 424 } 425 426 int sr_select_speed(struct cdrom_device_info *cdi, int speed) 427 { 428 Scsi_CD *cd = cdi->handle; 429 struct packet_command cgc; 430 431 if (speed == 0) 432 speed = 0xffff; /* set to max */ 433 else 434 speed *= 177; /* Nx to kbyte/s */ 435 436 memset(&cgc, 0, sizeof(struct packet_command)); 437 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */ 438 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */ 439 cgc.cmd[3] = speed & 0xff; /* LSB */ 440 cgc.data_direction = DMA_NONE; 441 cgc.timeout = IOCTL_TIMEOUT; 442 443 if (sr_do_ioctl(cd, &cgc)) 444 return -EIO; 445 return 0; 446 } 447 448 /* ----------------------------------------------------------------------- */ 449 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */ 450 /* because the generic cdrom driver does the user access stuff for us. */ 451 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */ 452 /* sr_disk_status interface for the generic cdrom driver. */ 453 454 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) 455 { 456 switch (cmd) { 457 case CDROMREADTOCHDR: 458 return sr_read_tochdr(cdi, arg); 459 case CDROMREADTOCENTRY: 460 return sr_read_tocentry(cdi, arg); 461 case CDROMPLAYTRKIND: 462 return sr_play_trkind(cdi, arg); 463 default: 464 return -EINVAL; 465 } 466 } 467 468 /* ----------------------------------------------------------------------- 469 * a function to read all sorts of funny cdrom sectors using the READ_CD 470 * scsi-3 mmc command 471 * 472 * lba: linear block address 473 * format: 0 = data (anything) 474 * 1 = audio 475 * 2 = data (mode 1) 476 * 3 = data (mode 2) 477 * 4 = data (mode 2 form1) 478 * 5 = data (mode 2 form2) 479 * blksize: 2048 | 2336 | 2340 | 2352 480 */ 481 482 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize) 483 { 484 struct packet_command cgc; 485 486 #ifdef DEBUG 487 sr_printk(KERN_INFO, cd, "sr_read_cd lba=%d format=%d blksize=%d\n", 488 lba, format, blksize); 489 #endif 490 491 memset(&cgc, 0, sizeof(struct packet_command)); 492 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */ 493 cgc.cmd[1] = ((format & 7) << 2); 494 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 495 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 496 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 497 cgc.cmd[5] = (unsigned char) lba & 0xff; 498 cgc.cmd[8] = 1; 499 switch (blksize) { 500 case 2336: 501 cgc.cmd[9] = 0x58; 502 break; 503 case 2340: 504 cgc.cmd[9] = 0x78; 505 break; 506 case 2352: 507 cgc.cmd[9] = 0xf8; 508 break; 509 default: 510 cgc.cmd[9] = 0x10; 511 break; 512 } 513 cgc.buffer = dest; 514 cgc.buflen = blksize; 515 cgc.data_direction = DMA_FROM_DEVICE; 516 cgc.timeout = IOCTL_TIMEOUT; 517 return sr_do_ioctl(cd, &cgc); 518 } 519 520 /* 521 * read sectors with blocksizes other than 2048 522 */ 523 524 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest) 525 { 526 struct packet_command cgc; 527 int rc; 528 529 /* we try the READ CD command first... */ 530 if (cd->readcd_known) { 531 rc = sr_read_cd(cd, dest, lba, 0, blksize); 532 if (-EDRIVE_CANT_DO_THIS != rc) 533 return rc; 534 cd->readcd_known = 0; 535 sr_printk(KERN_INFO, cd, 536 "CDROM does'nt support READ CD (0xbe) command\n"); 537 /* fall & retry the other way */ 538 } 539 /* ... if this fails, we switch the blocksize using MODE SELECT */ 540 if (blksize != cd->device->sector_size) { 541 if (0 != (rc = sr_set_blocklength(cd, blksize))) 542 return rc; 543 } 544 #ifdef DEBUG 545 sr_printk(KERN_INFO, cd, "sr_read_sector lba=%d blksize=%d\n", 546 lba, blksize); 547 #endif 548 549 memset(&cgc, 0, sizeof(struct packet_command)); 550 cgc.cmd[0] = GPCMD_READ_10; 551 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 552 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 553 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 554 cgc.cmd[5] = (unsigned char) lba & 0xff; 555 cgc.cmd[8] = 1; 556 cgc.buffer = dest; 557 cgc.buflen = blksize; 558 cgc.data_direction = DMA_FROM_DEVICE; 559 cgc.timeout = IOCTL_TIMEOUT; 560 rc = sr_do_ioctl(cd, &cgc); 561 562 return rc; 563 } 564 565 /* 566 * read a sector in raw mode to check the sector format 567 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 568 */ 569 570 int sr_is_xa(Scsi_CD *cd) 571 { 572 unsigned char *raw_sector; 573 int is_xa; 574 575 if (!xa_test) 576 return 0; 577 578 raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd)); 579 if (!raw_sector) 580 return -ENOMEM; 581 if (0 == sr_read_sector(cd, cd->ms_offset + 16, 582 CD_FRAMESIZE_RAW1, raw_sector)) { 583 is_xa = (raw_sector[3] == 0x02) ? 1 : 0; 584 } else { 585 /* read a raw sector failed for some reason. */ 586 is_xa = -1; 587 } 588 kfree(raw_sector); 589 #ifdef DEBUG 590 sr_printk(KERN_INFO, cd, "sr_is_xa: %d\n", is_xa); 591 #endif 592 return is_xa; 593 } 594