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 35 #define IOCTL_RETRIES 3 36 37 /* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives 38 are emulating a SCSI device via the idescsi module, they need to have 39 CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */ 40 41 static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti) 42 { 43 struct cdrom_tocentry trk0_te, trk1_te; 44 struct cdrom_tochdr tochdr; 45 struct packet_command cgc; 46 int ntracks, ret; 47 48 if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &tochdr))) 49 return ret; 50 51 ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1; 52 53 if (ti->cdti_trk1 == ntracks) 54 ti->cdti_trk1 = CDROM_LEADOUT; 55 else if (ti->cdti_trk1 != CDROM_LEADOUT) 56 ti->cdti_trk1 ++; 57 58 trk0_te.cdte_track = ti->cdti_trk0; 59 trk0_te.cdte_format = CDROM_MSF; 60 trk1_te.cdte_track = ti->cdti_trk1; 61 trk1_te.cdte_format = CDROM_MSF; 62 63 if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk0_te))) 64 return ret; 65 if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk1_te))) 66 return ret; 67 68 memset(&cgc, 0, sizeof(struct packet_command)); 69 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF; 70 cgc.cmd[3] = trk0_te.cdte_addr.msf.minute; 71 cgc.cmd[4] = trk0_te.cdte_addr.msf.second; 72 cgc.cmd[5] = trk0_te.cdte_addr.msf.frame; 73 cgc.cmd[6] = trk1_te.cdte_addr.msf.minute; 74 cgc.cmd[7] = trk1_te.cdte_addr.msf.second; 75 cgc.cmd[8] = trk1_te.cdte_addr.msf.frame; 76 cgc.data_direction = DMA_NONE; 77 cgc.timeout = IOCTL_TIMEOUT; 78 return sr_do_ioctl(cdi->handle, &cgc); 79 } 80 81 /* We do our own retries because we want to know what the specific 82 error code is. Normally the UNIT_ATTENTION code will automatically 83 clear after one error */ 84 85 int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc) 86 { 87 struct scsi_device *SDev; 88 struct scsi_sense_hdr sshdr; 89 int result, err = 0, retries = 0; 90 struct request_sense *sense = cgc->sense; 91 92 SDev = cd->device; 93 94 if (!sense) { 95 sense = kmalloc(sizeof(*sense), GFP_KERNEL); 96 if (!sense) { 97 err = -ENOMEM; 98 goto out; 99 } 100 } 101 102 retry: 103 if (!scsi_block_when_processing_errors(SDev)) { 104 err = -ENODEV; 105 goto out; 106 } 107 108 memset(sense, 0, sizeof(*sense)); 109 result = scsi_execute(SDev, cgc->cmd, cgc->data_direction, 110 cgc->buffer, cgc->buflen, (char *)sense, 111 cgc->timeout, IOCTL_RETRIES, 0); 112 113 scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr); 114 115 /* Minimal error checking. Ignore cases we know about, and report the rest. */ 116 if (driver_byte(result) != 0) { 117 switch (sshdr.sense_key) { 118 case UNIT_ATTENTION: 119 SDev->changed = 1; 120 if (!cgc->quiet) 121 printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name); 122 if (retries++ < 10) 123 goto retry; 124 err = -ENOMEDIUM; 125 break; 126 case NOT_READY: /* This happens if there is no disc in drive */ 127 if (sshdr.asc == 0x04 && 128 sshdr.ascq == 0x01) { 129 /* sense: Logical unit is in process of becoming ready */ 130 if (!cgc->quiet) 131 printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name); 132 if (retries++ < 10) { 133 /* sleep 2 sec and try again */ 134 ssleep(2); 135 goto retry; 136 } else { 137 /* 20 secs are enough? */ 138 err = -ENOMEDIUM; 139 break; 140 } 141 } 142 if (!cgc->quiet) 143 printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name); 144 #ifdef DEBUG 145 scsi_print_sense_hdr("sr", &sshdr); 146 #endif 147 err = -ENOMEDIUM; 148 break; 149 case ILLEGAL_REQUEST: 150 err = -EIO; 151 if (sshdr.asc == 0x20 && 152 sshdr.ascq == 0x00) 153 /* sense: Invalid command operation code */ 154 err = -EDRIVE_CANT_DO_THIS; 155 #ifdef DEBUG 156 __scsi_print_command(cgc->cmd); 157 scsi_print_sense_hdr("sr", &sshdr); 158 #endif 159 break; 160 default: 161 printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name); 162 __scsi_print_command(cgc->cmd); 163 scsi_print_sense_hdr("sr", &sshdr); 164 err = -EIO; 165 } 166 } 167 168 /* Wake up a process waiting for device */ 169 out: 170 if (!cgc->sense) 171 kfree(sense); 172 cgc->stat = err; 173 return err; 174 } 175 176 /* ---------------------------------------------------------------------- */ 177 /* interface to cdrom.c */ 178 179 static int test_unit_ready(Scsi_CD *cd) 180 { 181 struct packet_command cgc; 182 183 memset(&cgc, 0, sizeof(struct packet_command)); 184 cgc.cmd[0] = GPCMD_TEST_UNIT_READY; 185 cgc.quiet = 1; 186 cgc.data_direction = DMA_NONE; 187 cgc.timeout = IOCTL_TIMEOUT; 188 return sr_do_ioctl(cd, &cgc); 189 } 190 191 int sr_tray_move(struct cdrom_device_info *cdi, int pos) 192 { 193 Scsi_CD *cd = cdi->handle; 194 struct packet_command cgc; 195 196 memset(&cgc, 0, sizeof(struct packet_command)); 197 cgc.cmd[0] = GPCMD_START_STOP_UNIT; 198 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ; 199 cgc.data_direction = DMA_NONE; 200 cgc.timeout = IOCTL_TIMEOUT; 201 return sr_do_ioctl(cd, &cgc); 202 } 203 204 int sr_lock_door(struct cdrom_device_info *cdi, int lock) 205 { 206 Scsi_CD *cd = cdi->handle; 207 208 return scsi_set_medium_removal(cd->device, lock ? 209 SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); 210 } 211 212 int sr_drive_status(struct cdrom_device_info *cdi, int slot) 213 { 214 if (CDSL_CURRENT != slot) { 215 /* we have no changer support */ 216 return -EINVAL; 217 } 218 if (0 == test_unit_ready(cdi->handle)) 219 return CDS_DISC_OK; 220 221 return CDS_TRAY_OPEN; 222 } 223 224 int sr_disk_status(struct cdrom_device_info *cdi) 225 { 226 Scsi_CD *cd = cdi->handle; 227 struct cdrom_tochdr toc_h; 228 struct cdrom_tocentry toc_e; 229 int i, rc, have_datatracks = 0; 230 231 /* look for data tracks */ 232 if (0 != (rc = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &toc_h))) 233 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO; 234 235 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) { 236 toc_e.cdte_track = i; 237 toc_e.cdte_format = CDROM_LBA; 238 if (sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &toc_e)) 239 return CDS_NO_INFO; 240 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) { 241 have_datatracks = 1; 242 break; 243 } 244 } 245 if (!have_datatracks) 246 return CDS_AUDIO; 247 248 if (cd->xa_flag) 249 return CDS_XA_2_1; 250 else 251 return CDS_DATA_1; 252 } 253 254 int sr_get_last_session(struct cdrom_device_info *cdi, 255 struct cdrom_multisession *ms_info) 256 { 257 Scsi_CD *cd = cdi->handle; 258 259 ms_info->addr.lba = cd->ms_offset; 260 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0; 261 262 return 0; 263 } 264 265 /* primitive to determine whether we need to have GFP_DMA set based on 266 * the status of the unchecked_isa_dma flag in the host structure */ 267 #define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0) 268 269 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) 270 { 271 Scsi_CD *cd = cdi->handle; 272 struct packet_command cgc; 273 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 274 int result; 275 276 if (!buffer) 277 return -ENOMEM; 278 279 memset(&cgc, 0, sizeof(struct packet_command)); 280 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 281 cgc.cmd[2] = 0x40; /* I do want the subchannel info */ 282 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */ 283 cgc.cmd[8] = 24; 284 cgc.buffer = buffer; 285 cgc.buflen = 24; 286 cgc.data_direction = DMA_FROM_DEVICE; 287 cgc.timeout = IOCTL_TIMEOUT; 288 result = sr_do_ioctl(cd, &cgc); 289 290 memcpy(mcn->medium_catalog_number, buffer + 9, 13); 291 mcn->medium_catalog_number[13] = 0; 292 293 kfree(buffer); 294 return result; 295 } 296 297 int sr_reset(struct cdrom_device_info *cdi) 298 { 299 return 0; 300 } 301 302 int sr_select_speed(struct cdrom_device_info *cdi, int speed) 303 { 304 Scsi_CD *cd = cdi->handle; 305 struct packet_command cgc; 306 307 if (speed == 0) 308 speed = 0xffff; /* set to max */ 309 else 310 speed *= 177; /* Nx to kbyte/s */ 311 312 memset(&cgc, 0, sizeof(struct packet_command)); 313 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */ 314 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */ 315 cgc.cmd[3] = speed & 0xff; /* LSB */ 316 cgc.data_direction = DMA_NONE; 317 cgc.timeout = IOCTL_TIMEOUT; 318 319 if (sr_do_ioctl(cd, &cgc)) 320 return -EIO; 321 return 0; 322 } 323 324 /* ----------------------------------------------------------------------- */ 325 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */ 326 /* because the generic cdrom driver does the user access stuff for us. */ 327 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */ 328 /* sr_disk_status interface for the generic cdrom driver. */ 329 330 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) 331 { 332 Scsi_CD *cd = cdi->handle; 333 struct packet_command cgc; 334 int result; 335 unsigned char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 336 337 if (!buffer) 338 return -ENOMEM; 339 340 memset(&cgc, 0, sizeof(struct packet_command)); 341 cgc.timeout = IOCTL_TIMEOUT; 342 343 switch (cmd) { 344 case CDROMREADTOCHDR: 345 { 346 struct cdrom_tochdr *tochdr = (struct cdrom_tochdr *) arg; 347 348 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 349 cgc.cmd[8] = 12; /* LSB of length */ 350 cgc.buffer = buffer; 351 cgc.buflen = 12; 352 cgc.quiet = 1; 353 cgc.data_direction = DMA_FROM_DEVICE; 354 355 result = sr_do_ioctl(cd, &cgc); 356 357 tochdr->cdth_trk0 = buffer[2]; 358 tochdr->cdth_trk1 = buffer[3]; 359 360 break; 361 } 362 363 case CDROMREADTOCENTRY: 364 { 365 struct cdrom_tocentry *tocentry = (struct cdrom_tocentry *) arg; 366 367 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 368 cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0; 369 cgc.cmd[6] = tocentry->cdte_track; 370 cgc.cmd[8] = 12; /* LSB of length */ 371 cgc.buffer = buffer; 372 cgc.buflen = 12; 373 cgc.data_direction = DMA_FROM_DEVICE; 374 375 result = sr_do_ioctl(cd, &cgc); 376 377 tocentry->cdte_ctrl = buffer[5] & 0xf; 378 tocentry->cdte_adr = buffer[5] >> 4; 379 tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0; 380 if (tocentry->cdte_format == CDROM_MSF) { 381 tocentry->cdte_addr.msf.minute = buffer[9]; 382 tocentry->cdte_addr.msf.second = buffer[10]; 383 tocentry->cdte_addr.msf.frame = buffer[11]; 384 } else 385 tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8) 386 + buffer[10]) << 8) + buffer[11]; 387 388 break; 389 } 390 391 case CDROMPLAYTRKIND: { 392 struct cdrom_ti* ti = (struct cdrom_ti*)arg; 393 394 cgc.cmd[0] = GPCMD_PLAYAUDIO_TI; 395 cgc.cmd[4] = ti->cdti_trk0; 396 cgc.cmd[5] = ti->cdti_ind0; 397 cgc.cmd[7] = ti->cdti_trk1; 398 cgc.cmd[8] = ti->cdti_ind1; 399 cgc.data_direction = DMA_NONE; 400 401 result = sr_do_ioctl(cd, &cgc); 402 if (result == -EDRIVE_CANT_DO_THIS) 403 result = sr_fake_playtrkind(cdi, ti); 404 405 break; 406 } 407 408 default: 409 result = -EINVAL; 410 } 411 412 #if 0 413 if (result) 414 printk("DEBUG: sr_audio: result for ioctl %x: %x\n", cmd, result); 415 #endif 416 417 kfree(buffer); 418 return result; 419 } 420 421 /* ----------------------------------------------------------------------- 422 * a function to read all sorts of funny cdrom sectors using the READ_CD 423 * scsi-3 mmc command 424 * 425 * lba: linear block address 426 * format: 0 = data (anything) 427 * 1 = audio 428 * 2 = data (mode 1) 429 * 3 = data (mode 2) 430 * 4 = data (mode 2 form1) 431 * 5 = data (mode 2 form2) 432 * blksize: 2048 | 2336 | 2340 | 2352 433 */ 434 435 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize) 436 { 437 struct packet_command cgc; 438 439 #ifdef DEBUG 440 printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n", 441 cd->cdi.name, lba, format, blksize); 442 #endif 443 444 memset(&cgc, 0, sizeof(struct packet_command)); 445 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */ 446 cgc.cmd[1] = ((format & 7) << 2); 447 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 448 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 449 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 450 cgc.cmd[5] = (unsigned char) lba & 0xff; 451 cgc.cmd[8] = 1; 452 switch (blksize) { 453 case 2336: 454 cgc.cmd[9] = 0x58; 455 break; 456 case 2340: 457 cgc.cmd[9] = 0x78; 458 break; 459 case 2352: 460 cgc.cmd[9] = 0xf8; 461 break; 462 default: 463 cgc.cmd[9] = 0x10; 464 break; 465 } 466 cgc.buffer = dest; 467 cgc.buflen = blksize; 468 cgc.data_direction = DMA_FROM_DEVICE; 469 cgc.timeout = IOCTL_TIMEOUT; 470 return sr_do_ioctl(cd, &cgc); 471 } 472 473 /* 474 * read sectors with blocksizes other than 2048 475 */ 476 477 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest) 478 { 479 struct packet_command cgc; 480 int rc; 481 482 /* we try the READ CD command first... */ 483 if (cd->readcd_known) { 484 rc = sr_read_cd(cd, dest, lba, 0, blksize); 485 if (-EDRIVE_CANT_DO_THIS != rc) 486 return rc; 487 cd->readcd_known = 0; 488 printk("CDROM does'nt support READ CD (0xbe) command\n"); 489 /* fall & retry the other way */ 490 } 491 /* ... if this fails, we switch the blocksize using MODE SELECT */ 492 if (blksize != cd->device->sector_size) { 493 if (0 != (rc = sr_set_blocklength(cd, blksize))) 494 return rc; 495 } 496 #ifdef DEBUG 497 printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize); 498 #endif 499 500 memset(&cgc, 0, sizeof(struct packet_command)); 501 cgc.cmd[0] = GPCMD_READ_10; 502 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 503 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 504 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 505 cgc.cmd[5] = (unsigned char) lba & 0xff; 506 cgc.cmd[8] = 1; 507 cgc.buffer = dest; 508 cgc.buflen = blksize; 509 cgc.data_direction = DMA_FROM_DEVICE; 510 cgc.timeout = IOCTL_TIMEOUT; 511 rc = sr_do_ioctl(cd, &cgc); 512 513 return rc; 514 } 515 516 /* 517 * read a sector in raw mode to check the sector format 518 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 519 */ 520 521 int sr_is_xa(Scsi_CD *cd) 522 { 523 unsigned char *raw_sector; 524 int is_xa; 525 526 if (!xa_test) 527 return 0; 528 529 raw_sector = (unsigned char *) kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd)); 530 if (!raw_sector) 531 return -ENOMEM; 532 if (0 == sr_read_sector(cd, cd->ms_offset + 16, 533 CD_FRAMESIZE_RAW1, raw_sector)) { 534 is_xa = (raw_sector[3] == 0x02) ? 1 : 0; 535 } else { 536 /* read a raw sector failed for some reason. */ 537 is_xa = -1; 538 } 539 kfree(raw_sector); 540 #ifdef DEBUG 541 printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa); 542 #endif 543 return is_xa; 544 } 545 546 int sr_dev_ioctl(struct cdrom_device_info *cdi, 547 unsigned int cmd, unsigned long arg) 548 { 549 Scsi_CD *cd = cdi->handle; 550 int ret; 551 552 ret = scsi_nonblockable_ioctl(cd->device, cmd, 553 (void __user *)arg, NULL); 554 /* 555 * ENODEV means that we didn't recognise the ioctl, or that we 556 * cannot execute it in the current device state. In either 557 * case fall through to scsi_ioctl, which will return ENDOEV again 558 * if it doesn't recognise the ioctl 559 */ 560 if (ret != -ENODEV) 561 return ret; 562 return scsi_ioctl(cd->device, cmd, (void __user *)arg); 563 } 564