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; 190 191 SDev = cd->device; 192 193 retry: 194 if (!scsi_block_when_processing_errors(SDev)) { 195 err = -ENODEV; 196 goto out; 197 } 198 199 result = scsi_execute(SDev, cgc->cmd, cgc->data_direction, 200 cgc->buffer, cgc->buflen, 201 (unsigned char *)cgc->sense, &sshdr, 202 cgc->timeout, IOCTL_RETRIES, 0, 0, NULL); 203 204 /* Minimal error checking. Ignore cases we know about, and report the rest. */ 205 if (driver_byte(result) != 0) { 206 switch (sshdr.sense_key) { 207 case UNIT_ATTENTION: 208 SDev->changed = 1; 209 if (!cgc->quiet) 210 sr_printk(KERN_INFO, cd, 211 "disc change detected.\n"); 212 if (retries++ < 10) 213 goto retry; 214 err = -ENOMEDIUM; 215 break; 216 case NOT_READY: /* This happens if there is no disc in drive */ 217 if (sshdr.asc == 0x04 && 218 sshdr.ascq == 0x01) { 219 /* sense: Logical unit is in process of becoming ready */ 220 if (!cgc->quiet) 221 sr_printk(KERN_INFO, cd, 222 "CDROM not ready yet.\n"); 223 if (retries++ < 10) { 224 /* sleep 2 sec and try again */ 225 ssleep(2); 226 goto retry; 227 } else { 228 /* 20 secs are enough? */ 229 err = -ENOMEDIUM; 230 break; 231 } 232 } 233 if (!cgc->quiet) 234 sr_printk(KERN_INFO, cd, 235 "CDROM not ready. Make sure there " 236 "is a disc in the drive.\n"); 237 err = -ENOMEDIUM; 238 break; 239 case ILLEGAL_REQUEST: 240 err = -EIO; 241 if (sshdr.asc == 0x20 && 242 sshdr.ascq == 0x00) 243 /* sense: Invalid command operation code */ 244 err = -EDRIVE_CANT_DO_THIS; 245 break; 246 default: 247 err = -EIO; 248 } 249 } 250 251 /* Wake up a process waiting for device */ 252 out: 253 cgc->stat = err; 254 return err; 255 } 256 257 /* ---------------------------------------------------------------------- */ 258 /* interface to cdrom.c */ 259 260 int sr_tray_move(struct cdrom_device_info *cdi, int pos) 261 { 262 Scsi_CD *cd = cdi->handle; 263 struct packet_command cgc; 264 265 memset(&cgc, 0, sizeof(struct packet_command)); 266 cgc.cmd[0] = GPCMD_START_STOP_UNIT; 267 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ; 268 cgc.data_direction = DMA_NONE; 269 cgc.timeout = IOCTL_TIMEOUT; 270 return sr_do_ioctl(cd, &cgc); 271 } 272 273 int sr_lock_door(struct cdrom_device_info *cdi, int lock) 274 { 275 Scsi_CD *cd = cdi->handle; 276 277 return scsi_set_medium_removal(cd->device, lock ? 278 SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); 279 } 280 281 int sr_drive_status(struct cdrom_device_info *cdi, int slot) 282 { 283 struct scsi_cd *cd = cdi->handle; 284 struct scsi_sense_hdr sshdr; 285 struct media_event_desc med; 286 287 if (CDSL_CURRENT != slot) { 288 /* we have no changer support */ 289 return -EINVAL; 290 } 291 if (!scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr)) 292 return CDS_DISC_OK; 293 294 /* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */ 295 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY 296 && sshdr.asc == 0x04 && sshdr.ascq == 0x01) 297 return CDS_DRIVE_NOT_READY; 298 299 if (!cdrom_get_media_event(cdi, &med)) { 300 if (med.media_present) 301 return CDS_DISC_OK; 302 else if (med.door_open) 303 return CDS_TRAY_OPEN; 304 else 305 return CDS_NO_DISC; 306 } 307 308 /* 309 * SK/ASC/ASCQ of 2/4/2 means "initialization required" 310 * Using CD_TRAY_OPEN results in an START_STOP_UNIT to close 311 * the tray, which resolves the initialization requirement. 312 */ 313 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY 314 && sshdr.asc == 0x04 && sshdr.ascq == 0x02) 315 return CDS_TRAY_OPEN; 316 317 /* 318 * 0x04 is format in progress .. but there must be a disc present! 319 */ 320 if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04) 321 return CDS_DISC_OK; 322 323 /* 324 * If not using Mt Fuji extended media tray reports, 325 * just return TRAY_OPEN since ATAPI doesn't provide 326 * any other way to detect this... 327 */ 328 if (scsi_sense_valid(&sshdr) && 329 /* 0x3a is medium not present */ 330 sshdr.asc == 0x3a) 331 return CDS_NO_DISC; 332 else 333 return CDS_TRAY_OPEN; 334 335 return CDS_DRIVE_NOT_READY; 336 } 337 338 int sr_disk_status(struct cdrom_device_info *cdi) 339 { 340 Scsi_CD *cd = cdi->handle; 341 struct cdrom_tochdr toc_h; 342 struct cdrom_tocentry toc_e; 343 int i, rc, have_datatracks = 0; 344 345 /* look for data tracks */ 346 rc = sr_read_tochdr(cdi, &toc_h); 347 if (rc) 348 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO; 349 350 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) { 351 toc_e.cdte_track = i; 352 toc_e.cdte_format = CDROM_LBA; 353 if (sr_read_tocentry(cdi, &toc_e)) 354 return CDS_NO_INFO; 355 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) { 356 have_datatracks = 1; 357 break; 358 } 359 } 360 if (!have_datatracks) 361 return CDS_AUDIO; 362 363 if (cd->xa_flag) 364 return CDS_XA_2_1; 365 else 366 return CDS_DATA_1; 367 } 368 369 int sr_get_last_session(struct cdrom_device_info *cdi, 370 struct cdrom_multisession *ms_info) 371 { 372 Scsi_CD *cd = cdi->handle; 373 374 ms_info->addr.lba = cd->ms_offset; 375 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0; 376 377 return 0; 378 } 379 380 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) 381 { 382 Scsi_CD *cd = cdi->handle; 383 struct packet_command cgc; 384 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 385 int result; 386 387 if (!buffer) 388 return -ENOMEM; 389 390 memset(&cgc, 0, sizeof(struct packet_command)); 391 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 392 cgc.cmd[2] = 0x40; /* I do want the subchannel info */ 393 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */ 394 cgc.cmd[8] = 24; 395 cgc.buffer = buffer; 396 cgc.buflen = 24; 397 cgc.data_direction = DMA_FROM_DEVICE; 398 cgc.timeout = IOCTL_TIMEOUT; 399 result = sr_do_ioctl(cd, &cgc); 400 401 memcpy(mcn->medium_catalog_number, buffer + 9, 13); 402 mcn->medium_catalog_number[13] = 0; 403 404 kfree(buffer); 405 return result; 406 } 407 408 int sr_reset(struct cdrom_device_info *cdi) 409 { 410 return 0; 411 } 412 413 int sr_select_speed(struct cdrom_device_info *cdi, int speed) 414 { 415 Scsi_CD *cd = cdi->handle; 416 struct packet_command cgc; 417 418 if (speed == 0) 419 speed = 0xffff; /* set to max */ 420 else 421 speed *= 177; /* Nx to kbyte/s */ 422 423 memset(&cgc, 0, sizeof(struct packet_command)); 424 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */ 425 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */ 426 cgc.cmd[3] = speed & 0xff; /* LSB */ 427 cgc.data_direction = DMA_NONE; 428 cgc.timeout = IOCTL_TIMEOUT; 429 430 if (sr_do_ioctl(cd, &cgc)) 431 return -EIO; 432 return 0; 433 } 434 435 /* ----------------------------------------------------------------------- */ 436 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */ 437 /* because the generic cdrom driver does the user access stuff for us. */ 438 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */ 439 /* sr_disk_status interface for the generic cdrom driver. */ 440 441 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) 442 { 443 switch (cmd) { 444 case CDROMREADTOCHDR: 445 return sr_read_tochdr(cdi, arg); 446 case CDROMREADTOCENTRY: 447 return sr_read_tocentry(cdi, arg); 448 case CDROMPLAYTRKIND: 449 return sr_play_trkind(cdi, arg); 450 default: 451 return -EINVAL; 452 } 453 } 454 455 /* ----------------------------------------------------------------------- 456 * a function to read all sorts of funny cdrom sectors using the READ_CD 457 * scsi-3 mmc command 458 * 459 * lba: linear block address 460 * format: 0 = data (anything) 461 * 1 = audio 462 * 2 = data (mode 1) 463 * 3 = data (mode 2) 464 * 4 = data (mode 2 form1) 465 * 5 = data (mode 2 form2) 466 * blksize: 2048 | 2336 | 2340 | 2352 467 */ 468 469 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize) 470 { 471 struct packet_command cgc; 472 473 #ifdef DEBUG 474 sr_printk(KERN_INFO, cd, "sr_read_cd lba=%d format=%d blksize=%d\n", 475 lba, format, blksize); 476 #endif 477 478 memset(&cgc, 0, sizeof(struct packet_command)); 479 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */ 480 cgc.cmd[1] = ((format & 7) << 2); 481 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 482 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 483 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 484 cgc.cmd[5] = (unsigned char) lba & 0xff; 485 cgc.cmd[8] = 1; 486 switch (blksize) { 487 case 2336: 488 cgc.cmd[9] = 0x58; 489 break; 490 case 2340: 491 cgc.cmd[9] = 0x78; 492 break; 493 case 2352: 494 cgc.cmd[9] = 0xf8; 495 break; 496 default: 497 cgc.cmd[9] = 0x10; 498 break; 499 } 500 cgc.buffer = dest; 501 cgc.buflen = blksize; 502 cgc.data_direction = DMA_FROM_DEVICE; 503 cgc.timeout = IOCTL_TIMEOUT; 504 return sr_do_ioctl(cd, &cgc); 505 } 506 507 /* 508 * read sectors with blocksizes other than 2048 509 */ 510 511 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest) 512 { 513 struct packet_command cgc; 514 int rc; 515 516 /* we try the READ CD command first... */ 517 if (cd->readcd_known) { 518 rc = sr_read_cd(cd, dest, lba, 0, blksize); 519 if (-EDRIVE_CANT_DO_THIS != rc) 520 return rc; 521 cd->readcd_known = 0; 522 sr_printk(KERN_INFO, cd, 523 "CDROM does'nt support READ CD (0xbe) command\n"); 524 /* fall & retry the other way */ 525 } 526 /* ... if this fails, we switch the blocksize using MODE SELECT */ 527 if (blksize != cd->device->sector_size) { 528 if (0 != (rc = sr_set_blocklength(cd, blksize))) 529 return rc; 530 } 531 #ifdef DEBUG 532 sr_printk(KERN_INFO, cd, "sr_read_sector lba=%d blksize=%d\n", 533 lba, blksize); 534 #endif 535 536 memset(&cgc, 0, sizeof(struct packet_command)); 537 cgc.cmd[0] = GPCMD_READ_10; 538 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 539 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 540 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 541 cgc.cmd[5] = (unsigned char) lba & 0xff; 542 cgc.cmd[8] = 1; 543 cgc.buffer = dest; 544 cgc.buflen = blksize; 545 cgc.data_direction = DMA_FROM_DEVICE; 546 cgc.timeout = IOCTL_TIMEOUT; 547 rc = sr_do_ioctl(cd, &cgc); 548 549 return rc; 550 } 551 552 /* 553 * read a sector in raw mode to check the sector format 554 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 555 */ 556 557 int sr_is_xa(Scsi_CD *cd) 558 { 559 unsigned char *raw_sector; 560 int is_xa; 561 562 if (!xa_test) 563 return 0; 564 565 raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd)); 566 if (!raw_sector) 567 return -ENOMEM; 568 if (0 == sr_read_sector(cd, cd->ms_offset + 16, 569 CD_FRAMESIZE_RAW1, raw_sector)) { 570 is_xa = (raw_sector[3] == 0x02) ? 1 : 0; 571 } else { 572 /* read a raw sector failed for some reason. */ 573 is_xa = -1; 574 } 575 kfree(raw_sector); 576 #ifdef DEBUG 577 sr_printk(KERN_INFO, cd, "sr_is_xa: %d\n", is_xa); 578 #endif 579 return is_xa; 580 } 581