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/blkpg.h> 8 #include <linux/cdrom.h> 9 #include <linux/delay.h> 10 #include <asm/io.h> 11 #include <asm/uaccess.h> 12 13 #include <scsi/scsi.h> 14 #include <scsi/scsi_dbg.h> 15 #include <scsi/scsi_device.h> 16 #include <scsi/scsi_eh.h> 17 #include <scsi/scsi_host.h> 18 #include <scsi/scsi_ioctl.h> 19 #include <scsi/scsi_cmnd.h> 20 21 #include "sr.h" 22 23 #if 0 24 #define DEBUG 25 #endif 26 27 /* The sr_is_xa() seems to trigger firmware bugs with some drives :-( 28 * It is off by default and can be turned on with this module parameter */ 29 static int xa_test = 0; 30 31 module_param(xa_test, int, S_IRUGO | S_IWUSR); 32 33 /* primitive to determine whether we need to have GFP_DMA set based on 34 * the status of the unchecked_isa_dma flag in the host structure */ 35 #define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0) 36 37 38 static int sr_read_tochdr(struct cdrom_device_info *cdi, 39 struct cdrom_tochdr *tochdr) 40 { 41 struct scsi_cd *cd = cdi->handle; 42 struct packet_command cgc; 43 int result; 44 unsigned char *buffer; 45 46 buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 47 if (!buffer) 48 return -ENOMEM; 49 50 memset(&cgc, 0, sizeof(struct packet_command)); 51 cgc.timeout = IOCTL_TIMEOUT; 52 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 53 cgc.cmd[8] = 12; /* LSB of length */ 54 cgc.buffer = buffer; 55 cgc.buflen = 12; 56 cgc.quiet = 1; 57 cgc.data_direction = DMA_FROM_DEVICE; 58 59 result = sr_do_ioctl(cd, &cgc); 60 61 tochdr->cdth_trk0 = buffer[2]; 62 tochdr->cdth_trk1 = buffer[3]; 63 64 kfree(buffer); 65 return result; 66 } 67 68 static int sr_read_tocentry(struct cdrom_device_info *cdi, 69 struct cdrom_tocentry *tocentry) 70 { 71 struct scsi_cd *cd = cdi->handle; 72 struct packet_command cgc; 73 int result; 74 unsigned char *buffer; 75 76 buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 77 if (!buffer) 78 return -ENOMEM; 79 80 memset(&cgc, 0, sizeof(struct packet_command)); 81 cgc.timeout = IOCTL_TIMEOUT; 82 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 83 cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0; 84 cgc.cmd[6] = tocentry->cdte_track; 85 cgc.cmd[8] = 12; /* LSB of length */ 86 cgc.buffer = buffer; 87 cgc.buflen = 12; 88 cgc.data_direction = DMA_FROM_DEVICE; 89 90 result = sr_do_ioctl(cd, &cgc); 91 92 tocentry->cdte_ctrl = buffer[5] & 0xf; 93 tocentry->cdte_adr = buffer[5] >> 4; 94 tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0; 95 if (tocentry->cdte_format == CDROM_MSF) { 96 tocentry->cdte_addr.msf.minute = buffer[9]; 97 tocentry->cdte_addr.msf.second = buffer[10]; 98 tocentry->cdte_addr.msf.frame = buffer[11]; 99 } else 100 tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8) 101 + buffer[10]) << 8) + buffer[11]; 102 103 kfree(buffer); 104 return result; 105 } 106 107 #define IOCTL_RETRIES 3 108 109 /* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives 110 are emulating a SCSI device via the idescsi module, they need to have 111 CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */ 112 113 static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti) 114 { 115 struct cdrom_tocentry trk0_te, trk1_te; 116 struct cdrom_tochdr tochdr; 117 struct packet_command cgc; 118 int ntracks, ret; 119 120 ret = sr_read_tochdr(cdi, &tochdr); 121 if (ret) 122 return ret; 123 124 ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1; 125 126 if (ti->cdti_trk1 == ntracks) 127 ti->cdti_trk1 = CDROM_LEADOUT; 128 else if (ti->cdti_trk1 != CDROM_LEADOUT) 129 ti->cdti_trk1 ++; 130 131 trk0_te.cdte_track = ti->cdti_trk0; 132 trk0_te.cdte_format = CDROM_MSF; 133 trk1_te.cdte_track = ti->cdti_trk1; 134 trk1_te.cdte_format = CDROM_MSF; 135 136 ret = sr_read_tocentry(cdi, &trk0_te); 137 if (ret) 138 return ret; 139 ret = sr_read_tocentry(cdi, &trk1_te); 140 if (ret) 141 return ret; 142 143 memset(&cgc, 0, sizeof(struct packet_command)); 144 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF; 145 cgc.cmd[3] = trk0_te.cdte_addr.msf.minute; 146 cgc.cmd[4] = trk0_te.cdte_addr.msf.second; 147 cgc.cmd[5] = trk0_te.cdte_addr.msf.frame; 148 cgc.cmd[6] = trk1_te.cdte_addr.msf.minute; 149 cgc.cmd[7] = trk1_te.cdte_addr.msf.second; 150 cgc.cmd[8] = trk1_te.cdte_addr.msf.frame; 151 cgc.data_direction = DMA_NONE; 152 cgc.timeout = IOCTL_TIMEOUT; 153 return sr_do_ioctl(cdi->handle, &cgc); 154 } 155 156 static int sr_play_trkind(struct cdrom_device_info *cdi, 157 struct cdrom_ti *ti) 158 159 { 160 struct scsi_cd *cd = cdi->handle; 161 struct packet_command cgc; 162 int result; 163 164 memset(&cgc, 0, sizeof(struct packet_command)); 165 cgc.timeout = IOCTL_TIMEOUT; 166 cgc.cmd[0] = GPCMD_PLAYAUDIO_TI; 167 cgc.cmd[4] = ti->cdti_trk0; 168 cgc.cmd[5] = ti->cdti_ind0; 169 cgc.cmd[7] = ti->cdti_trk1; 170 cgc.cmd[8] = ti->cdti_ind1; 171 cgc.data_direction = DMA_NONE; 172 173 result = sr_do_ioctl(cd, &cgc); 174 if (result == -EDRIVE_CANT_DO_THIS) 175 result = sr_fake_playtrkind(cdi, ti); 176 177 return result; 178 } 179 180 /* We do our own retries because we want to know what the specific 181 error code is. Normally the UNIT_ATTENTION code will automatically 182 clear after one error */ 183 184 int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc) 185 { 186 struct scsi_device *SDev; 187 struct scsi_sense_hdr sshdr; 188 int result, err = 0, retries = 0; 189 struct request_sense *sense = cgc->sense; 190 191 SDev = cd->device; 192 193 if (!sense) { 194 sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL); 195 if (!sense) { 196 err = -ENOMEM; 197 goto out; 198 } 199 } 200 201 retry: 202 if (!scsi_block_when_processing_errors(SDev)) { 203 err = -ENODEV; 204 goto out; 205 } 206 207 memset(sense, 0, sizeof(*sense)); 208 result = scsi_execute(SDev, cgc->cmd, cgc->data_direction, 209 cgc->buffer, cgc->buflen, (char *)sense, 210 cgc->timeout, IOCTL_RETRIES, 0); 211 212 scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr); 213 214 /* Minimal error checking. Ignore cases we know about, and report the rest. */ 215 if (driver_byte(result) != 0) { 216 switch (sshdr.sense_key) { 217 case UNIT_ATTENTION: 218 SDev->changed = 1; 219 if (!cgc->quiet) 220 printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name); 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 printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name); 231 if (retries++ < 10) { 232 /* sleep 2 sec and try again */ 233 ssleep(2); 234 goto retry; 235 } else { 236 /* 20 secs are enough? */ 237 err = -ENOMEDIUM; 238 break; 239 } 240 } 241 if (!cgc->quiet) 242 printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name); 243 #ifdef DEBUG 244 scsi_print_sense_hdr("sr", &sshdr); 245 #endif 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 #ifdef DEBUG 255 __scsi_print_command(cgc->cmd); 256 scsi_print_sense_hdr("sr", &sshdr); 257 #endif 258 break; 259 default: 260 printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name); 261 __scsi_print_command(cgc->cmd); 262 scsi_print_sense_hdr("sr", &sshdr); 263 err = -EIO; 264 } 265 } 266 267 /* Wake up a process waiting for device */ 268 out: 269 if (!cgc->sense) 270 kfree(sense); 271 cgc->stat = err; 272 return err; 273 } 274 275 /* ---------------------------------------------------------------------- */ 276 /* interface to cdrom.c */ 277 278 int sr_tray_move(struct cdrom_device_info *cdi, int pos) 279 { 280 Scsi_CD *cd = cdi->handle; 281 struct packet_command cgc; 282 283 memset(&cgc, 0, sizeof(struct packet_command)); 284 cgc.cmd[0] = GPCMD_START_STOP_UNIT; 285 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ; 286 cgc.data_direction = DMA_NONE; 287 cgc.timeout = IOCTL_TIMEOUT; 288 return sr_do_ioctl(cd, &cgc); 289 } 290 291 int sr_lock_door(struct cdrom_device_info *cdi, int lock) 292 { 293 Scsi_CD *cd = cdi->handle; 294 295 return scsi_set_medium_removal(cd->device, lock ? 296 SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); 297 } 298 299 int sr_drive_status(struct cdrom_device_info *cdi, int slot) 300 { 301 struct scsi_cd *cd = cdi->handle; 302 struct scsi_sense_hdr sshdr; 303 struct media_event_desc med; 304 305 if (CDSL_CURRENT != slot) { 306 /* we have no changer support */ 307 return -EINVAL; 308 } 309 if (0 == sr_test_unit_ready(cd->device, &sshdr)) 310 return CDS_DISC_OK; 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 * 0x04 is format in progress .. but there must be a disc present! 323 */ 324 if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04) 325 return CDS_DISC_OK; 326 327 /* 328 * If not using Mt Fuji extended media tray reports, 329 * just return TRAY_OPEN since ATAPI doesn't provide 330 * any other way to detect this... 331 */ 332 if (scsi_sense_valid(&sshdr) && 333 /* 0x3a is medium not present */ 334 sshdr.asc == 0x3a) 335 return CDS_NO_DISC; 336 else 337 return CDS_TRAY_OPEN; 338 339 return CDS_DRIVE_NOT_READY; 340 } 341 342 int sr_disk_status(struct cdrom_device_info *cdi) 343 { 344 Scsi_CD *cd = cdi->handle; 345 struct cdrom_tochdr toc_h; 346 struct cdrom_tocentry toc_e; 347 int i, rc, have_datatracks = 0; 348 349 /* look for data tracks */ 350 rc = sr_read_tochdr(cdi, &toc_h); 351 if (rc) 352 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO; 353 354 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) { 355 toc_e.cdte_track = i; 356 toc_e.cdte_format = CDROM_LBA; 357 if (sr_read_tocentry(cdi, &toc_e)) 358 return CDS_NO_INFO; 359 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) { 360 have_datatracks = 1; 361 break; 362 } 363 } 364 if (!have_datatracks) 365 return CDS_AUDIO; 366 367 if (cd->xa_flag) 368 return CDS_XA_2_1; 369 else 370 return CDS_DATA_1; 371 } 372 373 int sr_get_last_session(struct cdrom_device_info *cdi, 374 struct cdrom_multisession *ms_info) 375 { 376 Scsi_CD *cd = cdi->handle; 377 378 ms_info->addr.lba = cd->ms_offset; 379 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0; 380 381 return 0; 382 } 383 384 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) 385 { 386 Scsi_CD *cd = cdi->handle; 387 struct packet_command cgc; 388 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 389 int result; 390 391 if (!buffer) 392 return -ENOMEM; 393 394 memset(&cgc, 0, sizeof(struct packet_command)); 395 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 396 cgc.cmd[2] = 0x40; /* I do want the subchannel info */ 397 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */ 398 cgc.cmd[8] = 24; 399 cgc.buffer = buffer; 400 cgc.buflen = 24; 401 cgc.data_direction = DMA_FROM_DEVICE; 402 cgc.timeout = IOCTL_TIMEOUT; 403 result = sr_do_ioctl(cd, &cgc); 404 405 memcpy(mcn->medium_catalog_number, buffer + 9, 13); 406 mcn->medium_catalog_number[13] = 0; 407 408 kfree(buffer); 409 return result; 410 } 411 412 int sr_reset(struct cdrom_device_info *cdi) 413 { 414 return 0; 415 } 416 417 int sr_select_speed(struct cdrom_device_info *cdi, int speed) 418 { 419 Scsi_CD *cd = cdi->handle; 420 struct packet_command cgc; 421 422 if (speed == 0) 423 speed = 0xffff; /* set to max */ 424 else 425 speed *= 177; /* Nx to kbyte/s */ 426 427 memset(&cgc, 0, sizeof(struct packet_command)); 428 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */ 429 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */ 430 cgc.cmd[3] = speed & 0xff; /* LSB */ 431 cgc.data_direction = DMA_NONE; 432 cgc.timeout = IOCTL_TIMEOUT; 433 434 if (sr_do_ioctl(cd, &cgc)) 435 return -EIO; 436 return 0; 437 } 438 439 /* ----------------------------------------------------------------------- */ 440 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */ 441 /* because the generic cdrom driver does the user access stuff for us. */ 442 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */ 443 /* sr_disk_status interface for the generic cdrom driver. */ 444 445 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) 446 { 447 switch (cmd) { 448 case CDROMREADTOCHDR: 449 return sr_read_tochdr(cdi, arg); 450 case CDROMREADTOCENTRY: 451 return sr_read_tocentry(cdi, arg); 452 case CDROMPLAYTRKIND: 453 return sr_play_trkind(cdi, arg); 454 default: 455 return -EINVAL; 456 } 457 } 458 459 /* ----------------------------------------------------------------------- 460 * a function to read all sorts of funny cdrom sectors using the READ_CD 461 * scsi-3 mmc command 462 * 463 * lba: linear block address 464 * format: 0 = data (anything) 465 * 1 = audio 466 * 2 = data (mode 1) 467 * 3 = data (mode 2) 468 * 4 = data (mode 2 form1) 469 * 5 = data (mode 2 form2) 470 * blksize: 2048 | 2336 | 2340 | 2352 471 */ 472 473 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize) 474 { 475 struct packet_command cgc; 476 477 #ifdef DEBUG 478 printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n", 479 cd->cdi.name, lba, format, blksize); 480 #endif 481 482 memset(&cgc, 0, sizeof(struct packet_command)); 483 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */ 484 cgc.cmd[1] = ((format & 7) << 2); 485 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 486 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 487 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 488 cgc.cmd[5] = (unsigned char) lba & 0xff; 489 cgc.cmd[8] = 1; 490 switch (blksize) { 491 case 2336: 492 cgc.cmd[9] = 0x58; 493 break; 494 case 2340: 495 cgc.cmd[9] = 0x78; 496 break; 497 case 2352: 498 cgc.cmd[9] = 0xf8; 499 break; 500 default: 501 cgc.cmd[9] = 0x10; 502 break; 503 } 504 cgc.buffer = dest; 505 cgc.buflen = blksize; 506 cgc.data_direction = DMA_FROM_DEVICE; 507 cgc.timeout = IOCTL_TIMEOUT; 508 return sr_do_ioctl(cd, &cgc); 509 } 510 511 /* 512 * read sectors with blocksizes other than 2048 513 */ 514 515 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest) 516 { 517 struct packet_command cgc; 518 int rc; 519 520 /* we try the READ CD command first... */ 521 if (cd->readcd_known) { 522 rc = sr_read_cd(cd, dest, lba, 0, blksize); 523 if (-EDRIVE_CANT_DO_THIS != rc) 524 return rc; 525 cd->readcd_known = 0; 526 printk("CDROM does'nt support READ CD (0xbe) command\n"); 527 /* fall & retry the other way */ 528 } 529 /* ... if this fails, we switch the blocksize using MODE SELECT */ 530 if (blksize != cd->device->sector_size) { 531 if (0 != (rc = sr_set_blocklength(cd, blksize))) 532 return rc; 533 } 534 #ifdef DEBUG 535 printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize); 536 #endif 537 538 memset(&cgc, 0, sizeof(struct packet_command)); 539 cgc.cmd[0] = GPCMD_READ_10; 540 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 541 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 542 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 543 cgc.cmd[5] = (unsigned char) lba & 0xff; 544 cgc.cmd[8] = 1; 545 cgc.buffer = dest; 546 cgc.buflen = blksize; 547 cgc.data_direction = DMA_FROM_DEVICE; 548 cgc.timeout = IOCTL_TIMEOUT; 549 rc = sr_do_ioctl(cd, &cgc); 550 551 return rc; 552 } 553 554 /* 555 * read a sector in raw mode to check the sector format 556 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 557 */ 558 559 int sr_is_xa(Scsi_CD *cd) 560 { 561 unsigned char *raw_sector; 562 int is_xa; 563 564 if (!xa_test) 565 return 0; 566 567 raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd)); 568 if (!raw_sector) 569 return -ENOMEM; 570 if (0 == sr_read_sector(cd, cd->ms_offset + 16, 571 CD_FRAMESIZE_RAW1, raw_sector)) { 572 is_xa = (raw_sector[3] == 0x02) ? 1 : 0; 573 } else { 574 /* read a raw sector failed for some reason. */ 575 is_xa = -1; 576 } 577 kfree(raw_sector); 578 #ifdef DEBUG 579 printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa); 580 #endif 581 return is_xa; 582 } 583