1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/kernel.h> 3 #include <linux/mm.h> 4 #include <linux/fs.h> 5 #include <linux/errno.h> 6 #include <linux/string.h> 7 #include <linux/blkdev.h> 8 #include <linux/module.h> 9 #include <linux/blkpg.h> 10 #include <linux/cdrom.h> 11 #include <linux/delay.h> 12 #include <linux/slab.h> 13 #include <asm/io.h> 14 #include <linux/uaccess.h> 15 16 #include <scsi/scsi.h> 17 #include <scsi/scsi_dbg.h> 18 #include <scsi/scsi_device.h> 19 #include <scsi/scsi_eh.h> 20 #include <scsi/scsi_host.h> 21 #include <scsi/scsi_ioctl.h> 22 #include <scsi/scsi_cmnd.h> 23 24 #include "sr.h" 25 26 #if 0 27 #define DEBUG 28 #endif 29 30 /* The sr_is_xa() seems to trigger firmware bugs with some drives :-( 31 * It is off by default and can be turned on with this module parameter */ 32 static int xa_test = 0; 33 34 module_param(xa_test, int, S_IRUGO | S_IWUSR); 35 36 static int sr_read_tochdr(struct cdrom_device_info *cdi, 37 struct cdrom_tochdr *tochdr) 38 { 39 struct scsi_cd *cd = cdi->handle; 40 struct packet_command cgc; 41 int result; 42 unsigned char *buffer; 43 44 buffer = kzalloc(32, GFP_KERNEL); 45 if (!buffer) 46 return -ENOMEM; 47 48 memset(&cgc, 0, sizeof(struct packet_command)); 49 cgc.timeout = IOCTL_TIMEOUT; 50 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 51 cgc.cmd[8] = 12; /* LSB of length */ 52 cgc.buffer = buffer; 53 cgc.buflen = 12; 54 cgc.quiet = 1; 55 cgc.data_direction = DMA_FROM_DEVICE; 56 57 result = sr_do_ioctl(cd, &cgc); 58 if (result) 59 goto err; 60 61 tochdr->cdth_trk0 = buffer[2]; 62 tochdr->cdth_trk1 = buffer[3]; 63 64 err: 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 = kzalloc(32, GFP_KERNEL); 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 if (result) 93 goto err; 94 95 tocentry->cdte_ctrl = buffer[5] & 0xf; 96 tocentry->cdte_adr = buffer[5] >> 4; 97 tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0; 98 if (tocentry->cdte_format == CDROM_MSF) { 99 tocentry->cdte_addr.msf.minute = buffer[9]; 100 tocentry->cdte_addr.msf.second = buffer[10]; 101 tocentry->cdte_addr.msf.frame = buffer[11]; 102 } else 103 tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8) 104 + buffer[10]) << 8) + buffer[11]; 105 106 err: 107 kfree(buffer); 108 return result; 109 } 110 111 #define IOCTL_RETRIES 3 112 113 /* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives 114 are emulating a SCSI device via the idescsi module, they need to have 115 CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */ 116 117 static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti) 118 { 119 struct cdrom_tocentry trk0_te, trk1_te; 120 struct cdrom_tochdr tochdr; 121 struct packet_command cgc; 122 int ntracks, ret; 123 124 ret = sr_read_tochdr(cdi, &tochdr); 125 if (ret) 126 return ret; 127 128 ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1; 129 130 if (ti->cdti_trk1 == ntracks) 131 ti->cdti_trk1 = CDROM_LEADOUT; 132 else if (ti->cdti_trk1 != CDROM_LEADOUT) 133 ti->cdti_trk1 ++; 134 135 trk0_te.cdte_track = ti->cdti_trk0; 136 trk0_te.cdte_format = CDROM_MSF; 137 trk1_te.cdte_track = ti->cdti_trk1; 138 trk1_te.cdte_format = CDROM_MSF; 139 140 ret = sr_read_tocentry(cdi, &trk0_te); 141 if (ret) 142 return ret; 143 ret = sr_read_tocentry(cdi, &trk1_te); 144 if (ret) 145 return ret; 146 147 memset(&cgc, 0, sizeof(struct packet_command)); 148 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF; 149 cgc.cmd[3] = trk0_te.cdte_addr.msf.minute; 150 cgc.cmd[4] = trk0_te.cdte_addr.msf.second; 151 cgc.cmd[5] = trk0_te.cdte_addr.msf.frame; 152 cgc.cmd[6] = trk1_te.cdte_addr.msf.minute; 153 cgc.cmd[7] = trk1_te.cdte_addr.msf.second; 154 cgc.cmd[8] = trk1_te.cdte_addr.msf.frame; 155 cgc.data_direction = DMA_NONE; 156 cgc.timeout = IOCTL_TIMEOUT; 157 return sr_do_ioctl(cdi->handle, &cgc); 158 } 159 160 static int sr_play_trkind(struct cdrom_device_info *cdi, 161 struct cdrom_ti *ti) 162 163 { 164 struct scsi_cd *cd = cdi->handle; 165 struct packet_command cgc; 166 int result; 167 168 memset(&cgc, 0, sizeof(struct packet_command)); 169 cgc.timeout = IOCTL_TIMEOUT; 170 cgc.cmd[0] = GPCMD_PLAYAUDIO_TI; 171 cgc.cmd[4] = ti->cdti_trk0; 172 cgc.cmd[5] = ti->cdti_ind0; 173 cgc.cmd[7] = ti->cdti_trk1; 174 cgc.cmd[8] = ti->cdti_ind1; 175 cgc.data_direction = DMA_NONE; 176 177 result = sr_do_ioctl(cd, &cgc); 178 if (result == -EDRIVE_CANT_DO_THIS) 179 result = sr_fake_playtrkind(cdi, ti); 180 181 return result; 182 } 183 184 /* We do our own retries because we want to know what the specific 185 error code is. Normally the UNIT_ATTENTION code will automatically 186 clear after one error */ 187 188 int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc) 189 { 190 struct scsi_device *SDev; 191 struct scsi_sense_hdr local_sshdr, *sshdr = &local_sshdr; 192 int result, err = 0, retries = 0; 193 194 SDev = cd->device; 195 196 if (cgc->sshdr) 197 sshdr = cgc->sshdr; 198 199 retry: 200 if (!scsi_block_when_processing_errors(SDev)) { 201 err = -ENODEV; 202 goto out; 203 } 204 205 result = scsi_execute(SDev, cgc->cmd, cgc->data_direction, 206 cgc->buffer, cgc->buflen, NULL, sshdr, 207 cgc->timeout, IOCTL_RETRIES, 0, 0, NULL); 208 209 /* Minimal error checking. Ignore cases we know about, and report the rest. */ 210 if (result < 0) { 211 err = result; 212 goto out; 213 } 214 if (scsi_status_is_check_condition(result)) { 215 switch (sshdr->sense_key) { 216 case UNIT_ATTENTION: 217 SDev->changed = 1; 218 if (!cgc->quiet) 219 sr_printk(KERN_INFO, cd, 220 "disc change detected.\n"); 221 if (retries++ < 10) 222 goto retry; 223 err = -ENOMEDIUM; 224 break; 225 case NOT_READY: /* This happens if there is no disc in drive */ 226 if (sshdr->asc == 0x04 && 227 sshdr->ascq == 0x01) { 228 /* sense: Logical unit is in process of becoming ready */ 229 if (!cgc->quiet) 230 sr_printk(KERN_INFO, cd, 231 "CDROM not ready yet.\n"); 232 if (retries++ < 10) { 233 /* sleep 2 sec and try again */ 234 ssleep(2); 235 goto retry; 236 } else { 237 /* 20 secs are enough? */ 238 err = -ENOMEDIUM; 239 break; 240 } 241 } 242 if (!cgc->quiet) 243 sr_printk(KERN_INFO, cd, 244 "CDROM not ready. Make sure there " 245 "is a disc in the drive.\n"); 246 err = -ENOMEDIUM; 247 break; 248 case ILLEGAL_REQUEST: 249 err = -EIO; 250 if (sshdr->asc == 0x20 && 251 sshdr->ascq == 0x00) 252 /* sense: Invalid command operation code */ 253 err = -EDRIVE_CANT_DO_THIS; 254 break; 255 default: 256 err = -EIO; 257 } 258 } 259 260 /* Wake up a process waiting for device */ 261 out: 262 cgc->stat = err; 263 return err; 264 } 265 266 /* ---------------------------------------------------------------------- */ 267 /* interface to cdrom.c */ 268 269 int sr_tray_move(struct cdrom_device_info *cdi, int pos) 270 { 271 Scsi_CD *cd = cdi->handle; 272 struct packet_command cgc; 273 274 memset(&cgc, 0, sizeof(struct packet_command)); 275 cgc.cmd[0] = GPCMD_START_STOP_UNIT; 276 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ; 277 cgc.data_direction = DMA_NONE; 278 cgc.timeout = IOCTL_TIMEOUT; 279 return sr_do_ioctl(cd, &cgc); 280 } 281 282 int sr_lock_door(struct cdrom_device_info *cdi, int lock) 283 { 284 Scsi_CD *cd = cdi->handle; 285 286 return scsi_set_medium_removal(cd->device, lock ? 287 SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); 288 } 289 290 int sr_drive_status(struct cdrom_device_info *cdi, int slot) 291 { 292 struct scsi_cd *cd = cdi->handle; 293 struct scsi_sense_hdr sshdr; 294 struct media_event_desc med; 295 296 if (CDSL_CURRENT != slot) { 297 /* we have no changer support */ 298 return -EINVAL; 299 } 300 if (!scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr)) 301 return CDS_DISC_OK; 302 303 /* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */ 304 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY 305 && sshdr.asc == 0x04 && sshdr.ascq == 0x01) 306 return CDS_DRIVE_NOT_READY; 307 308 if (!cdrom_get_media_event(cdi, &med)) { 309 if (med.media_present) 310 return CDS_DISC_OK; 311 else if (med.door_open) 312 return CDS_TRAY_OPEN; 313 else 314 return CDS_NO_DISC; 315 } 316 317 /* 318 * SK/ASC/ASCQ of 2/4/2 means "initialization required" 319 * Using CD_TRAY_OPEN results in an START_STOP_UNIT to close 320 * the tray, which resolves the initialization requirement. 321 */ 322 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY 323 && sshdr.asc == 0x04 && sshdr.ascq == 0x02) 324 return CDS_TRAY_OPEN; 325 326 /* 327 * 0x04 is format in progress .. but there must be a disc present! 328 */ 329 if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04) 330 return CDS_DISC_OK; 331 332 /* 333 * If not using Mt Fuji extended media tray reports, 334 * just return TRAY_OPEN since ATAPI doesn't provide 335 * any other way to detect this... 336 */ 337 if (scsi_sense_valid(&sshdr) && 338 /* 0x3a is medium not present */ 339 sshdr.asc == 0x3a) 340 return CDS_NO_DISC; 341 else 342 return CDS_TRAY_OPEN; 343 344 return CDS_DRIVE_NOT_READY; 345 } 346 347 int sr_disk_status(struct cdrom_device_info *cdi) 348 { 349 Scsi_CD *cd = cdi->handle; 350 struct cdrom_tochdr toc_h; 351 struct cdrom_tocentry toc_e; 352 int i, rc, have_datatracks = 0; 353 354 /* look for data tracks */ 355 rc = sr_read_tochdr(cdi, &toc_h); 356 if (rc) 357 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO; 358 359 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) { 360 toc_e.cdte_track = i; 361 toc_e.cdte_format = CDROM_LBA; 362 if (sr_read_tocentry(cdi, &toc_e)) 363 return CDS_NO_INFO; 364 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) { 365 have_datatracks = 1; 366 break; 367 } 368 } 369 if (!have_datatracks) 370 return CDS_AUDIO; 371 372 if (cd->xa_flag) 373 return CDS_XA_2_1; 374 else 375 return CDS_DATA_1; 376 } 377 378 int sr_get_last_session(struct cdrom_device_info *cdi, 379 struct cdrom_multisession *ms_info) 380 { 381 Scsi_CD *cd = cdi->handle; 382 383 ms_info->addr.lba = cd->ms_offset; 384 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0; 385 386 return 0; 387 } 388 389 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) 390 { 391 Scsi_CD *cd = cdi->handle; 392 struct packet_command cgc; 393 char *buffer = kzalloc(32, GFP_KERNEL); 394 int result; 395 396 if (!buffer) 397 return -ENOMEM; 398 399 memset(&cgc, 0, sizeof(struct packet_command)); 400 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 401 cgc.cmd[2] = 0x40; /* I do want the subchannel info */ 402 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */ 403 cgc.cmd[8] = 24; 404 cgc.buffer = buffer; 405 cgc.buflen = 24; 406 cgc.data_direction = DMA_FROM_DEVICE; 407 cgc.timeout = IOCTL_TIMEOUT; 408 result = sr_do_ioctl(cd, &cgc); 409 if (result) 410 goto err; 411 412 memcpy(mcn->medium_catalog_number, buffer + 9, 13); 413 mcn->medium_catalog_number[13] = 0; 414 415 err: 416 kfree(buffer); 417 return result; 418 } 419 420 int sr_reset(struct cdrom_device_info *cdi) 421 { 422 return 0; 423 } 424 425 int sr_select_speed(struct cdrom_device_info *cdi, int speed) 426 { 427 Scsi_CD *cd = cdi->handle; 428 struct packet_command cgc; 429 430 if (speed == 0) 431 speed = 0xffff; /* set to max */ 432 else 433 speed *= 177; /* Nx to kbyte/s */ 434 435 memset(&cgc, 0, sizeof(struct packet_command)); 436 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */ 437 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */ 438 cgc.cmd[3] = speed & 0xff; /* LSB */ 439 cgc.data_direction = DMA_NONE; 440 cgc.timeout = IOCTL_TIMEOUT; 441 442 if (sr_do_ioctl(cd, &cgc)) 443 return -EIO; 444 return 0; 445 } 446 447 /* ----------------------------------------------------------------------- */ 448 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */ 449 /* because the generic cdrom driver does the user access stuff for us. */ 450 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */ 451 /* sr_disk_status interface for the generic cdrom driver. */ 452 453 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) 454 { 455 switch (cmd) { 456 case CDROMREADTOCHDR: 457 return sr_read_tochdr(cdi, arg); 458 case CDROMREADTOCENTRY: 459 return sr_read_tocentry(cdi, arg); 460 case CDROMPLAYTRKIND: 461 return sr_play_trkind(cdi, arg); 462 default: 463 return -EINVAL; 464 } 465 } 466 467 /* ----------------------------------------------------------------------- 468 * a function to read all sorts of funny cdrom sectors using the READ_CD 469 * scsi-3 mmc command 470 * 471 * lba: linear block address 472 * format: 0 = data (anything) 473 * 1 = audio 474 * 2 = data (mode 1) 475 * 3 = data (mode 2) 476 * 4 = data (mode 2 form1) 477 * 5 = data (mode 2 form2) 478 * blksize: 2048 | 2336 | 2340 | 2352 479 */ 480 481 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize) 482 { 483 struct packet_command cgc; 484 485 #ifdef DEBUG 486 sr_printk(KERN_INFO, cd, "sr_read_cd lba=%d format=%d blksize=%d\n", 487 lba, format, blksize); 488 #endif 489 490 memset(&cgc, 0, sizeof(struct packet_command)); 491 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */ 492 cgc.cmd[1] = ((format & 7) << 2); 493 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 494 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 495 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 496 cgc.cmd[5] = (unsigned char) lba & 0xff; 497 cgc.cmd[8] = 1; 498 switch (blksize) { 499 case 2336: 500 cgc.cmd[9] = 0x58; 501 break; 502 case 2340: 503 cgc.cmd[9] = 0x78; 504 break; 505 case 2352: 506 cgc.cmd[9] = 0xf8; 507 break; 508 default: 509 cgc.cmd[9] = 0x10; 510 break; 511 } 512 cgc.buffer = dest; 513 cgc.buflen = blksize; 514 cgc.data_direction = DMA_FROM_DEVICE; 515 cgc.timeout = IOCTL_TIMEOUT; 516 return sr_do_ioctl(cd, &cgc); 517 } 518 519 /* 520 * read sectors with blocksizes other than 2048 521 */ 522 523 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest) 524 { 525 struct packet_command cgc; 526 int rc; 527 528 /* we try the READ CD command first... */ 529 if (cd->readcd_known) { 530 rc = sr_read_cd(cd, dest, lba, 0, blksize); 531 if (-EDRIVE_CANT_DO_THIS != rc) 532 return rc; 533 cd->readcd_known = 0; 534 sr_printk(KERN_INFO, cd, 535 "CDROM doesn't support READ CD (0xbe) command\n"); 536 /* fall & retry the other way */ 537 } 538 /* ... if this fails, we switch the blocksize using MODE SELECT */ 539 if (blksize != cd->device->sector_size) { 540 if (0 != (rc = sr_set_blocklength(cd, blksize))) 541 return rc; 542 } 543 #ifdef DEBUG 544 sr_printk(KERN_INFO, cd, "sr_read_sector lba=%d blksize=%d\n", 545 lba, blksize); 546 #endif 547 548 memset(&cgc, 0, sizeof(struct packet_command)); 549 cgc.cmd[0] = GPCMD_READ_10; 550 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 551 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 552 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 553 cgc.cmd[5] = (unsigned char) lba & 0xff; 554 cgc.cmd[8] = 1; 555 cgc.buffer = dest; 556 cgc.buflen = blksize; 557 cgc.data_direction = DMA_FROM_DEVICE; 558 cgc.timeout = IOCTL_TIMEOUT; 559 rc = sr_do_ioctl(cd, &cgc); 560 561 if (blksize != CD_FRAMESIZE) 562 rc |= sr_set_blocklength(cd, CD_FRAMESIZE); 563 return rc; 564 } 565 566 /* 567 * read a sector in raw mode to check the sector format 568 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 569 */ 570 571 int sr_is_xa(Scsi_CD *cd) 572 { 573 unsigned char *raw_sector; 574 int is_xa; 575 576 if (!xa_test) 577 return 0; 578 579 raw_sector = kmalloc(2048, GFP_KERNEL); 580 if (!raw_sector) 581 return -ENOMEM; 582 if (0 == sr_read_sector(cd, cd->ms_offset + 16, 583 CD_FRAMESIZE_RAW1, raw_sector)) { 584 is_xa = (raw_sector[3] == 0x02) ? 1 : 0; 585 } else { 586 /* read a raw sector failed for some reason. */ 587 is_xa = -1; 588 } 589 kfree(raw_sector); 590 #ifdef DEBUG 591 sr_printk(KERN_INFO, cd, "sr_is_xa: %d\n", is_xa); 592 #endif 593 return is_xa; 594 } 595