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_request.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_request *SRpnt; 88 struct scsi_device *SDev; 89 struct request *req; 90 int result, err = 0, retries = 0; 91 92 SDev = cd->device; 93 SRpnt = scsi_allocate_request(SDev, GFP_KERNEL); 94 if (!SRpnt) { 95 printk(KERN_ERR "Unable to allocate SCSI request in sr_do_ioctl"); 96 err = -ENOMEM; 97 goto out; 98 } 99 SRpnt->sr_data_direction = cgc->data_direction; 100 101 retry: 102 if (!scsi_block_when_processing_errors(SDev)) { 103 err = -ENODEV; 104 goto out_free; 105 } 106 107 scsi_wait_req(SRpnt, cgc->cmd, cgc->buffer, cgc->buflen, 108 cgc->timeout, IOCTL_RETRIES); 109 110 req = SRpnt->sr_request; 111 if (SRpnt->sr_buffer && req->buffer && SRpnt->sr_buffer != req->buffer) { 112 memcpy(req->buffer, SRpnt->sr_buffer, SRpnt->sr_bufflen); 113 kfree(SRpnt->sr_buffer); 114 SRpnt->sr_buffer = req->buffer; 115 } 116 117 result = SRpnt->sr_result; 118 119 /* Minimal error checking. Ignore cases we know about, and report the rest. */ 120 if (driver_byte(result) != 0) { 121 switch (SRpnt->sr_sense_buffer[2] & 0xf) { 122 case UNIT_ATTENTION: 123 SDev->changed = 1; 124 if (!cgc->quiet) 125 printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name); 126 if (retries++ < 10) 127 goto retry; 128 err = -ENOMEDIUM; 129 break; 130 case NOT_READY: /* This happens if there is no disc in drive */ 131 if (SRpnt->sr_sense_buffer[12] == 0x04 && 132 SRpnt->sr_sense_buffer[13] == 0x01) { 133 /* sense: Logical unit is in process of becoming ready */ 134 if (!cgc->quiet) 135 printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name); 136 if (retries++ < 10) { 137 /* sleep 2 sec and try again */ 138 ssleep(2); 139 goto retry; 140 } else { 141 /* 20 secs are enough? */ 142 err = -ENOMEDIUM; 143 break; 144 } 145 } 146 if (!cgc->quiet) 147 printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name); 148 #ifdef DEBUG 149 scsi_print_req_sense("sr", SRpnt); 150 #endif 151 err = -ENOMEDIUM; 152 break; 153 case ILLEGAL_REQUEST: 154 err = -EIO; 155 if (SRpnt->sr_sense_buffer[12] == 0x20 && 156 SRpnt->sr_sense_buffer[13] == 0x00) 157 /* sense: Invalid command operation code */ 158 err = -EDRIVE_CANT_DO_THIS; 159 #ifdef DEBUG 160 __scsi_print_command(cgc->cmd); 161 scsi_print_req_sense("sr", SRpnt); 162 #endif 163 break; 164 default: 165 printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name); 166 __scsi_print_command(cgc->cmd); 167 scsi_print_req_sense("sr", SRpnt); 168 err = -EIO; 169 } 170 } 171 172 if (cgc->sense) 173 memcpy(cgc->sense, SRpnt->sr_sense_buffer, sizeof(*cgc->sense)); 174 175 /* Wake up a process waiting for device */ 176 out_free: 177 scsi_release_request(SRpnt); 178 SRpnt = NULL; 179 out: 180 cgc->stat = err; 181 return err; 182 } 183 184 /* ---------------------------------------------------------------------- */ 185 /* interface to cdrom.c */ 186 187 static int test_unit_ready(Scsi_CD *cd) 188 { 189 struct packet_command cgc; 190 191 memset(&cgc, 0, sizeof(struct packet_command)); 192 cgc.cmd[0] = GPCMD_TEST_UNIT_READY; 193 cgc.quiet = 1; 194 cgc.data_direction = DMA_NONE; 195 cgc.timeout = IOCTL_TIMEOUT; 196 return sr_do_ioctl(cd, &cgc); 197 } 198 199 int sr_tray_move(struct cdrom_device_info *cdi, int pos) 200 { 201 Scsi_CD *cd = cdi->handle; 202 struct packet_command cgc; 203 204 memset(&cgc, 0, sizeof(struct packet_command)); 205 cgc.cmd[0] = GPCMD_START_STOP_UNIT; 206 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ; 207 cgc.data_direction = DMA_NONE; 208 cgc.timeout = IOCTL_TIMEOUT; 209 return sr_do_ioctl(cd, &cgc); 210 } 211 212 int sr_lock_door(struct cdrom_device_info *cdi, int lock) 213 { 214 Scsi_CD *cd = cdi->handle; 215 216 return scsi_set_medium_removal(cd->device, lock ? 217 SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); 218 } 219 220 int sr_drive_status(struct cdrom_device_info *cdi, int slot) 221 { 222 if (CDSL_CURRENT != slot) { 223 /* we have no changer support */ 224 return -EINVAL; 225 } 226 if (0 == test_unit_ready(cdi->handle)) 227 return CDS_DISC_OK; 228 229 return CDS_TRAY_OPEN; 230 } 231 232 int sr_disk_status(struct cdrom_device_info *cdi) 233 { 234 Scsi_CD *cd = cdi->handle; 235 struct cdrom_tochdr toc_h; 236 struct cdrom_tocentry toc_e; 237 int i, rc, have_datatracks = 0; 238 239 /* look for data tracks */ 240 if (0 != (rc = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &toc_h))) 241 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO; 242 243 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) { 244 toc_e.cdte_track = i; 245 toc_e.cdte_format = CDROM_LBA; 246 if (sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &toc_e)) 247 return CDS_NO_INFO; 248 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) { 249 have_datatracks = 1; 250 break; 251 } 252 } 253 if (!have_datatracks) 254 return CDS_AUDIO; 255 256 if (cd->xa_flag) 257 return CDS_XA_2_1; 258 else 259 return CDS_DATA_1; 260 } 261 262 int sr_get_last_session(struct cdrom_device_info *cdi, 263 struct cdrom_multisession *ms_info) 264 { 265 Scsi_CD *cd = cdi->handle; 266 267 ms_info->addr.lba = cd->ms_offset; 268 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0; 269 270 return 0; 271 } 272 273 /* primitive to determine whether we need to have GFP_DMA set based on 274 * the status of the unchecked_isa_dma flag in the host structure */ 275 #define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0) 276 277 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) 278 { 279 Scsi_CD *cd = cdi->handle; 280 struct packet_command cgc; 281 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 282 int result; 283 284 if (!buffer) 285 return -ENOMEM; 286 287 memset(&cgc, 0, sizeof(struct packet_command)); 288 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 289 cgc.cmd[2] = 0x40; /* I do want the subchannel info */ 290 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */ 291 cgc.cmd[8] = 24; 292 cgc.buffer = buffer; 293 cgc.buflen = 24; 294 cgc.data_direction = DMA_FROM_DEVICE; 295 cgc.timeout = IOCTL_TIMEOUT; 296 result = sr_do_ioctl(cd, &cgc); 297 298 memcpy(mcn->medium_catalog_number, buffer + 9, 13); 299 mcn->medium_catalog_number[13] = 0; 300 301 kfree(buffer); 302 return result; 303 } 304 305 int sr_reset(struct cdrom_device_info *cdi) 306 { 307 return 0; 308 } 309 310 int sr_select_speed(struct cdrom_device_info *cdi, int speed) 311 { 312 Scsi_CD *cd = cdi->handle; 313 struct packet_command cgc; 314 315 if (speed == 0) 316 speed = 0xffff; /* set to max */ 317 else 318 speed *= 177; /* Nx to kbyte/s */ 319 320 memset(&cgc, 0, sizeof(struct packet_command)); 321 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */ 322 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */ 323 cgc.cmd[3] = speed & 0xff; /* LSB */ 324 cgc.data_direction = DMA_NONE; 325 cgc.timeout = IOCTL_TIMEOUT; 326 327 if (sr_do_ioctl(cd, &cgc)) 328 return -EIO; 329 return 0; 330 } 331 332 /* ----------------------------------------------------------------------- */ 333 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */ 334 /* because the generic cdrom driver does the user access stuff for us. */ 335 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the */ 336 /* sr_disk_status interface for the generic cdrom driver. */ 337 338 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) 339 { 340 Scsi_CD *cd = cdi->handle; 341 struct packet_command cgc; 342 int result; 343 unsigned char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 344 345 if (!buffer) 346 return -ENOMEM; 347 348 memset(&cgc, 0, sizeof(struct packet_command)); 349 cgc.timeout = IOCTL_TIMEOUT; 350 351 switch (cmd) { 352 case CDROMREADTOCHDR: 353 { 354 struct cdrom_tochdr *tochdr = (struct cdrom_tochdr *) arg; 355 356 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 357 cgc.cmd[8] = 12; /* LSB of length */ 358 cgc.buffer = buffer; 359 cgc.buflen = 12; 360 cgc.quiet = 1; 361 cgc.data_direction = DMA_FROM_DEVICE; 362 363 result = sr_do_ioctl(cd, &cgc); 364 365 tochdr->cdth_trk0 = buffer[2]; 366 tochdr->cdth_trk1 = buffer[3]; 367 368 break; 369 } 370 371 case CDROMREADTOCENTRY: 372 { 373 struct cdrom_tocentry *tocentry = (struct cdrom_tocentry *) arg; 374 375 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 376 cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0; 377 cgc.cmd[6] = tocentry->cdte_track; 378 cgc.cmd[8] = 12; /* LSB of length */ 379 cgc.buffer = buffer; 380 cgc.buflen = 12; 381 cgc.data_direction = DMA_FROM_DEVICE; 382 383 result = sr_do_ioctl(cd, &cgc); 384 385 tocentry->cdte_ctrl = buffer[5] & 0xf; 386 tocentry->cdte_adr = buffer[5] >> 4; 387 tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0; 388 if (tocentry->cdte_format == CDROM_MSF) { 389 tocentry->cdte_addr.msf.minute = buffer[9]; 390 tocentry->cdte_addr.msf.second = buffer[10]; 391 tocentry->cdte_addr.msf.frame = buffer[11]; 392 } else 393 tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8) 394 + buffer[10]) << 8) + buffer[11]; 395 396 break; 397 } 398 399 case CDROMPLAYTRKIND: { 400 struct cdrom_ti* ti = (struct cdrom_ti*)arg; 401 402 cgc.cmd[0] = GPCMD_PLAYAUDIO_TI; 403 cgc.cmd[4] = ti->cdti_trk0; 404 cgc.cmd[5] = ti->cdti_ind0; 405 cgc.cmd[7] = ti->cdti_trk1; 406 cgc.cmd[8] = ti->cdti_ind1; 407 cgc.data_direction = DMA_NONE; 408 409 result = sr_do_ioctl(cd, &cgc); 410 if (result == -EDRIVE_CANT_DO_THIS) 411 result = sr_fake_playtrkind(cdi, ti); 412 413 break; 414 } 415 416 default: 417 result = -EINVAL; 418 } 419 420 #if 0 421 if (result) 422 printk("DEBUG: sr_audio: result for ioctl %x: %x\n", cmd, result); 423 #endif 424 425 kfree(buffer); 426 return result; 427 } 428 429 /* ----------------------------------------------------------------------- 430 * a function to read all sorts of funny cdrom sectors using the READ_CD 431 * scsi-3 mmc command 432 * 433 * lba: linear block address 434 * format: 0 = data (anything) 435 * 1 = audio 436 * 2 = data (mode 1) 437 * 3 = data (mode 2) 438 * 4 = data (mode 2 form1) 439 * 5 = data (mode 2 form2) 440 * blksize: 2048 | 2336 | 2340 | 2352 441 */ 442 443 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize) 444 { 445 struct packet_command cgc; 446 447 #ifdef DEBUG 448 printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n", 449 cd->cdi.name, lba, format, blksize); 450 #endif 451 452 memset(&cgc, 0, sizeof(struct packet_command)); 453 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */ 454 cgc.cmd[1] = ((format & 7) << 2); 455 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 456 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 457 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 458 cgc.cmd[5] = (unsigned char) lba & 0xff; 459 cgc.cmd[8] = 1; 460 switch (blksize) { 461 case 2336: 462 cgc.cmd[9] = 0x58; 463 break; 464 case 2340: 465 cgc.cmd[9] = 0x78; 466 break; 467 case 2352: 468 cgc.cmd[9] = 0xf8; 469 break; 470 default: 471 cgc.cmd[9] = 0x10; 472 break; 473 } 474 cgc.buffer = dest; 475 cgc.buflen = blksize; 476 cgc.data_direction = DMA_FROM_DEVICE; 477 cgc.timeout = IOCTL_TIMEOUT; 478 return sr_do_ioctl(cd, &cgc); 479 } 480 481 /* 482 * read sectors with blocksizes other than 2048 483 */ 484 485 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest) 486 { 487 struct packet_command cgc; 488 int rc; 489 490 /* we try the READ CD command first... */ 491 if (cd->readcd_known) { 492 rc = sr_read_cd(cd, dest, lba, 0, blksize); 493 if (-EDRIVE_CANT_DO_THIS != rc) 494 return rc; 495 cd->readcd_known = 0; 496 printk("CDROM does'nt support READ CD (0xbe) command\n"); 497 /* fall & retry the other way */ 498 } 499 /* ... if this fails, we switch the blocksize using MODE SELECT */ 500 if (blksize != cd->device->sector_size) { 501 if (0 != (rc = sr_set_blocklength(cd, blksize))) 502 return rc; 503 } 504 #ifdef DEBUG 505 printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize); 506 #endif 507 508 memset(&cgc, 0, sizeof(struct packet_command)); 509 cgc.cmd[0] = GPCMD_READ_10; 510 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 511 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 512 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 513 cgc.cmd[5] = (unsigned char) lba & 0xff; 514 cgc.cmd[8] = 1; 515 cgc.buffer = dest; 516 cgc.buflen = blksize; 517 cgc.data_direction = DMA_FROM_DEVICE; 518 cgc.timeout = IOCTL_TIMEOUT; 519 rc = sr_do_ioctl(cd, &cgc); 520 521 return rc; 522 } 523 524 /* 525 * read a sector in raw mode to check the sector format 526 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 527 */ 528 529 int sr_is_xa(Scsi_CD *cd) 530 { 531 unsigned char *raw_sector; 532 int is_xa; 533 534 if (!xa_test) 535 return 0; 536 537 raw_sector = (unsigned char *) kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd)); 538 if (!raw_sector) 539 return -ENOMEM; 540 if (0 == sr_read_sector(cd, cd->ms_offset + 16, 541 CD_FRAMESIZE_RAW1, raw_sector)) { 542 is_xa = (raw_sector[3] == 0x02) ? 1 : 0; 543 } else { 544 /* read a raw sector failed for some reason. */ 545 is_xa = -1; 546 } 547 kfree(raw_sector); 548 #ifdef DEBUG 549 printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa); 550 #endif 551 return is_xa; 552 } 553 554 int sr_dev_ioctl(struct cdrom_device_info *cdi, 555 unsigned int cmd, unsigned long arg) 556 { 557 Scsi_CD *cd = cdi->handle; 558 int ret; 559 560 ret = scsi_nonblockable_ioctl(cd->device, cmd, 561 (void __user *)arg, NULL); 562 /* 563 * ENODEV means that we didn't recognise the ioctl, or that we 564 * cannot execute it in the current device state. In either 565 * case fall through to scsi_ioctl, which will return ENDOEV again 566 * if it doesn't recognise the ioctl 567 */ 568 if (ret != -ENODEV) 569 return ret; 570 return scsi_ioctl(cd->device, cmd, (void __user *)arg); 571 } 572