1 #include <linux/kernel.h> 2 #include <linux/sched.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/blkpg.h> 9 #include <linux/cdrom.h> 10 #include <linux/delay.h> 11 #include <asm/io.h> 12 #include <asm/uaccess.h> 13 14 #include <scsi/scsi.h> 15 #include <scsi/scsi_dbg.h> 16 #include <scsi/scsi_device.h> 17 #include <scsi/scsi_eh.h> 18 #include <scsi/scsi_host.h> 19 #include <scsi/scsi_ioctl.h> 20 #include <scsi/scsi_cmnd.h> 21 22 #include "sr.h" 23 24 #if 0 25 #define DEBUG 26 #endif 27 28 /* The sr_is_xa() seems to trigger firmware bugs with some drives :-( 29 * It is off by default and can be turned on with this module parameter */ 30 static int xa_test = 0; 31 32 module_param(xa_test, int, S_IRUGO | S_IWUSR); 33 34 /* primitive to determine whether we need to have GFP_DMA set based on 35 * the status of the unchecked_isa_dma flag in the host structure */ 36 #define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0) 37 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); 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 printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name); 222 if (retries++ < 10) 223 goto retry; 224 err = -ENOMEDIUM; 225 break; 226 case NOT_READY: /* This happens if there is no disc in drive */ 227 if (sshdr.asc == 0x04 && 228 sshdr.ascq == 0x01) { 229 /* sense: Logical unit is in process of becoming ready */ 230 if (!cgc->quiet) 231 printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name); 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 printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name); 244 #ifdef DEBUG 245 scsi_print_sense_hdr("sr", &sshdr); 246 #endif 247 err = -ENOMEDIUM; 248 break; 249 case ILLEGAL_REQUEST: 250 err = -EIO; 251 if (sshdr.asc == 0x20 && 252 sshdr.ascq == 0x00) 253 /* sense: Invalid command operation code */ 254 err = -EDRIVE_CANT_DO_THIS; 255 #ifdef DEBUG 256 __scsi_print_command(cgc->cmd); 257 scsi_print_sense_hdr("sr", &sshdr); 258 #endif 259 break; 260 default: 261 printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name); 262 __scsi_print_command(cgc->cmd); 263 scsi_print_sense_hdr("sr", &sshdr); 264 err = -EIO; 265 } 266 } 267 268 /* Wake up a process waiting for device */ 269 out: 270 if (!cgc->sense) 271 kfree(sense); 272 cgc->stat = err; 273 return err; 274 } 275 276 /* ---------------------------------------------------------------------- */ 277 /* interface to cdrom.c */ 278 279 static int test_unit_ready(Scsi_CD *cd) 280 { 281 struct packet_command cgc; 282 283 memset(&cgc, 0, sizeof(struct packet_command)); 284 cgc.cmd[0] = GPCMD_TEST_UNIT_READY; 285 cgc.quiet = 1; 286 cgc.data_direction = DMA_NONE; 287 cgc.timeout = IOCTL_TIMEOUT; 288 return sr_do_ioctl(cd, &cgc); 289 } 290 291 int sr_tray_move(struct cdrom_device_info *cdi, int pos) 292 { 293 Scsi_CD *cd = cdi->handle; 294 struct packet_command cgc; 295 296 memset(&cgc, 0, sizeof(struct packet_command)); 297 cgc.cmd[0] = GPCMD_START_STOP_UNIT; 298 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ; 299 cgc.data_direction = DMA_NONE; 300 cgc.timeout = IOCTL_TIMEOUT; 301 return sr_do_ioctl(cd, &cgc); 302 } 303 304 int sr_lock_door(struct cdrom_device_info *cdi, int lock) 305 { 306 Scsi_CD *cd = cdi->handle; 307 308 return scsi_set_medium_removal(cd->device, lock ? 309 SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); 310 } 311 312 int sr_drive_status(struct cdrom_device_info *cdi, int slot) 313 { 314 if (CDSL_CURRENT != slot) { 315 /* we have no changer support */ 316 return -EINVAL; 317 } 318 if (0 == test_unit_ready(cdi->handle)) 319 return CDS_DISC_OK; 320 321 return CDS_TRAY_OPEN; 322 } 323 324 int sr_disk_status(struct cdrom_device_info *cdi) 325 { 326 Scsi_CD *cd = cdi->handle; 327 struct cdrom_tochdr toc_h; 328 struct cdrom_tocentry toc_e; 329 int i, rc, have_datatracks = 0; 330 331 /* look for data tracks */ 332 rc = sr_read_tochdr(cdi, &toc_h); 333 if (rc) 334 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO; 335 336 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) { 337 toc_e.cdte_track = i; 338 toc_e.cdte_format = CDROM_LBA; 339 if (sr_read_tocentry(cdi, &toc_e)) 340 return CDS_NO_INFO; 341 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) { 342 have_datatracks = 1; 343 break; 344 } 345 } 346 if (!have_datatracks) 347 return CDS_AUDIO; 348 349 if (cd->xa_flag) 350 return CDS_XA_2_1; 351 else 352 return CDS_DATA_1; 353 } 354 355 int sr_get_last_session(struct cdrom_device_info *cdi, 356 struct cdrom_multisession *ms_info) 357 { 358 Scsi_CD *cd = cdi->handle; 359 360 ms_info->addr.lba = cd->ms_offset; 361 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0; 362 363 return 0; 364 } 365 366 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) 367 { 368 Scsi_CD *cd = cdi->handle; 369 struct packet_command cgc; 370 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 371 int result; 372 373 if (!buffer) 374 return -ENOMEM; 375 376 memset(&cgc, 0, sizeof(struct packet_command)); 377 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 378 cgc.cmd[2] = 0x40; /* I do want the subchannel info */ 379 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */ 380 cgc.cmd[8] = 24; 381 cgc.buffer = buffer; 382 cgc.buflen = 24; 383 cgc.data_direction = DMA_FROM_DEVICE; 384 cgc.timeout = IOCTL_TIMEOUT; 385 result = sr_do_ioctl(cd, &cgc); 386 387 memcpy(mcn->medium_catalog_number, buffer + 9, 13); 388 mcn->medium_catalog_number[13] = 0; 389 390 kfree(buffer); 391 return result; 392 } 393 394 int sr_reset(struct cdrom_device_info *cdi) 395 { 396 return 0; 397 } 398 399 int sr_select_speed(struct cdrom_device_info *cdi, int speed) 400 { 401 Scsi_CD *cd = cdi->handle; 402 struct packet_command cgc; 403 404 if (speed == 0) 405 speed = 0xffff; /* set to max */ 406 else 407 speed *= 177; /* Nx to kbyte/s */ 408 409 memset(&cgc, 0, sizeof(struct packet_command)); 410 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */ 411 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */ 412 cgc.cmd[3] = speed & 0xff; /* LSB */ 413 cgc.data_direction = DMA_NONE; 414 cgc.timeout = IOCTL_TIMEOUT; 415 416 if (sr_do_ioctl(cd, &cgc)) 417 return -EIO; 418 return 0; 419 } 420 421 /* ----------------------------------------------------------------------- */ 422 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */ 423 /* because the generic cdrom driver does the user access stuff for us. */ 424 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */ 425 /* sr_disk_status interface for the generic cdrom driver. */ 426 427 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) 428 { 429 switch (cmd) { 430 case CDROMREADTOCHDR: 431 return sr_read_tochdr(cdi, arg); 432 case CDROMREADTOCENTRY: 433 return sr_read_tocentry(cdi, arg); 434 case CDROMPLAYTRKIND: 435 return sr_play_trkind(cdi, arg); 436 default: 437 return -EINVAL; 438 } 439 } 440 441 /* ----------------------------------------------------------------------- 442 * a function to read all sorts of funny cdrom sectors using the READ_CD 443 * scsi-3 mmc command 444 * 445 * lba: linear block address 446 * format: 0 = data (anything) 447 * 1 = audio 448 * 2 = data (mode 1) 449 * 3 = data (mode 2) 450 * 4 = data (mode 2 form1) 451 * 5 = data (mode 2 form2) 452 * blksize: 2048 | 2336 | 2340 | 2352 453 */ 454 455 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize) 456 { 457 struct packet_command cgc; 458 459 #ifdef DEBUG 460 printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n", 461 cd->cdi.name, lba, format, blksize); 462 #endif 463 464 memset(&cgc, 0, sizeof(struct packet_command)); 465 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */ 466 cgc.cmd[1] = ((format & 7) << 2); 467 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 468 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 469 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 470 cgc.cmd[5] = (unsigned char) lba & 0xff; 471 cgc.cmd[8] = 1; 472 switch (blksize) { 473 case 2336: 474 cgc.cmd[9] = 0x58; 475 break; 476 case 2340: 477 cgc.cmd[9] = 0x78; 478 break; 479 case 2352: 480 cgc.cmd[9] = 0xf8; 481 break; 482 default: 483 cgc.cmd[9] = 0x10; 484 break; 485 } 486 cgc.buffer = dest; 487 cgc.buflen = blksize; 488 cgc.data_direction = DMA_FROM_DEVICE; 489 cgc.timeout = IOCTL_TIMEOUT; 490 return sr_do_ioctl(cd, &cgc); 491 } 492 493 /* 494 * read sectors with blocksizes other than 2048 495 */ 496 497 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest) 498 { 499 struct packet_command cgc; 500 int rc; 501 502 /* we try the READ CD command first... */ 503 if (cd->readcd_known) { 504 rc = sr_read_cd(cd, dest, lba, 0, blksize); 505 if (-EDRIVE_CANT_DO_THIS != rc) 506 return rc; 507 cd->readcd_known = 0; 508 printk("CDROM does'nt support READ CD (0xbe) command\n"); 509 /* fall & retry the other way */ 510 } 511 /* ... if this fails, we switch the blocksize using MODE SELECT */ 512 if (blksize != cd->device->sector_size) { 513 if (0 != (rc = sr_set_blocklength(cd, blksize))) 514 return rc; 515 } 516 #ifdef DEBUG 517 printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize); 518 #endif 519 520 memset(&cgc, 0, sizeof(struct packet_command)); 521 cgc.cmd[0] = GPCMD_READ_10; 522 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 523 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 524 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 525 cgc.cmd[5] = (unsigned char) lba & 0xff; 526 cgc.cmd[8] = 1; 527 cgc.buffer = dest; 528 cgc.buflen = blksize; 529 cgc.data_direction = DMA_FROM_DEVICE; 530 cgc.timeout = IOCTL_TIMEOUT; 531 rc = sr_do_ioctl(cd, &cgc); 532 533 return rc; 534 } 535 536 /* 537 * read a sector in raw mode to check the sector format 538 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 539 */ 540 541 int sr_is_xa(Scsi_CD *cd) 542 { 543 unsigned char *raw_sector; 544 int is_xa; 545 546 if (!xa_test) 547 return 0; 548 549 raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd)); 550 if (!raw_sector) 551 return -ENOMEM; 552 if (0 == sr_read_sector(cd, cd->ms_offset + 16, 553 CD_FRAMESIZE_RAW1, raw_sector)) { 554 is_xa = (raw_sector[3] == 0x02) ? 1 : 0; 555 } else { 556 /* read a raw sector failed for some reason. */ 557 is_xa = -1; 558 } 559 kfree(raw_sector); 560 #ifdef DEBUG 561 printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa); 562 #endif 563 return is_xa; 564 } 565