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 <asm/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 */ 31static int xa_test = 0; 32 33module_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 40static int sr_read_tochdr(struct cdrom_device_info *cdi, 41 struct cdrom_tochdr *tochdr) 42{ 43 struct scsi_cd *cd = cdi->handle; 44 struct packet_command cgc; 45 int result; 46 unsigned char *buffer; 47 48 buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 49 if (!buffer) 50 return -ENOMEM; 51 52 memset(&cgc, 0, sizeof(struct packet_command)); 53 cgc.timeout = IOCTL_TIMEOUT; 54 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 55 cgc.cmd[8] = 12; /* LSB of length */ 56 cgc.buffer = buffer; 57 cgc.buflen = 12; 58 cgc.quiet = 1; 59 cgc.data_direction = DMA_FROM_DEVICE; 60 61 result = sr_do_ioctl(cd, &cgc); 62 63 tochdr->cdth_trk0 = buffer[2]; 64 tochdr->cdth_trk1 = buffer[3]; 65 66 kfree(buffer); 67 return result; 68} 69 70static int sr_read_tocentry(struct cdrom_device_info *cdi, 71 struct cdrom_tocentry *tocentry) 72{ 73 struct scsi_cd *cd = cdi->handle; 74 struct packet_command cgc; 75 int result; 76 unsigned char *buffer; 77 78 buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 79 if (!buffer) 80 return -ENOMEM; 81 82 memset(&cgc, 0, sizeof(struct packet_command)); 83 cgc.timeout = IOCTL_TIMEOUT; 84 cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 85 cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0; 86 cgc.cmd[6] = tocentry->cdte_track; 87 cgc.cmd[8] = 12; /* LSB of length */ 88 cgc.buffer = buffer; 89 cgc.buflen = 12; 90 cgc.data_direction = DMA_FROM_DEVICE; 91 92 result = sr_do_ioctl(cd, &cgc); 93 94 tocentry->cdte_ctrl = buffer[5] & 0xf; 95 tocentry->cdte_adr = buffer[5] >> 4; 96 tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0; 97 if (tocentry->cdte_format == CDROM_MSF) { 98 tocentry->cdte_addr.msf.minute = buffer[9]; 99 tocentry->cdte_addr.msf.second = buffer[10]; 100 tocentry->cdte_addr.msf.frame = buffer[11]; 101 } else 102 tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8) 103 + buffer[10]) << 8) + buffer[11]; 104 105 kfree(buffer); 106 return result; 107} 108 109#define IOCTL_RETRIES 3 110 111/* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives 112 are emulating a SCSI device via the idescsi module, they need to have 113 CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */ 114 115static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti) 116{ 117 struct cdrom_tocentry trk0_te, trk1_te; 118 struct cdrom_tochdr tochdr; 119 struct packet_command cgc; 120 int ntracks, ret; 121 122 ret = sr_read_tochdr(cdi, &tochdr); 123 if (ret) 124 return ret; 125 126 ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1; 127 128 if (ti->cdti_trk1 == ntracks) 129 ti->cdti_trk1 = CDROM_LEADOUT; 130 else if (ti->cdti_trk1 != CDROM_LEADOUT) 131 ti->cdti_trk1 ++; 132 133 trk0_te.cdte_track = ti->cdti_trk0; 134 trk0_te.cdte_format = CDROM_MSF; 135 trk1_te.cdte_track = ti->cdti_trk1; 136 trk1_te.cdte_format = CDROM_MSF; 137 138 ret = sr_read_tocentry(cdi, &trk0_te); 139 if (ret) 140 return ret; 141 ret = sr_read_tocentry(cdi, &trk1_te); 142 if (ret) 143 return ret; 144 145 memset(&cgc, 0, sizeof(struct packet_command)); 146 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF; 147 cgc.cmd[3] = trk0_te.cdte_addr.msf.minute; 148 cgc.cmd[4] = trk0_te.cdte_addr.msf.second; 149 cgc.cmd[5] = trk0_te.cdte_addr.msf.frame; 150 cgc.cmd[6] = trk1_te.cdte_addr.msf.minute; 151 cgc.cmd[7] = trk1_te.cdte_addr.msf.second; 152 cgc.cmd[8] = trk1_te.cdte_addr.msf.frame; 153 cgc.data_direction = DMA_NONE; 154 cgc.timeout = IOCTL_TIMEOUT; 155 return sr_do_ioctl(cdi->handle, &cgc); 156} 157 158static int sr_play_trkind(struct cdrom_device_info *cdi, 159 struct cdrom_ti *ti) 160 161{ 162 struct scsi_cd *cd = cdi->handle; 163 struct packet_command cgc; 164 int result; 165 166 memset(&cgc, 0, sizeof(struct packet_command)); 167 cgc.timeout = IOCTL_TIMEOUT; 168 cgc.cmd[0] = GPCMD_PLAYAUDIO_TI; 169 cgc.cmd[4] = ti->cdti_trk0; 170 cgc.cmd[5] = ti->cdti_ind0; 171 cgc.cmd[7] = ti->cdti_trk1; 172 cgc.cmd[8] = ti->cdti_ind1; 173 cgc.data_direction = DMA_NONE; 174 175 result = sr_do_ioctl(cd, &cgc); 176 if (result == -EDRIVE_CANT_DO_THIS) 177 result = sr_fake_playtrkind(cdi, ti); 178 179 return result; 180} 181 182/* We do our own retries because we want to know what the specific 183 error code is. Normally the UNIT_ATTENTION code will automatically 184 clear after one error */ 185 186int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc) 187{ 188 struct scsi_device *SDev; 189 struct scsi_sense_hdr sshdr; 190 int result, err = 0, retries = 0; 191 struct request_sense *sense = cgc->sense; 192 193 SDev = cd->device; 194 195 if (!sense) { 196 sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL); 197 if (!sense) { 198 err = -ENOMEM; 199 goto out; 200 } 201 } 202 203 retry: 204 if (!scsi_block_when_processing_errors(SDev)) { 205 err = -ENODEV; 206 goto out; 207 } 208 209 memset(sense, 0, sizeof(*sense)); 210 result = scsi_execute(SDev, cgc->cmd, cgc->data_direction, 211 cgc->buffer, cgc->buflen, (char *)sense, 212 cgc->timeout, IOCTL_RETRIES, 0, NULL); 213 214 scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr); 215 216 /* Minimal error checking. Ignore cases we know about, and report the rest. */ 217 if (driver_byte(result) != 0) { 218 switch (sshdr.sense_key) { 219 case UNIT_ATTENTION: 220 SDev->changed = 1; 221 if (!cgc->quiet) 222 printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name); 223 if (retries++ < 10) 224 goto retry; 225 err = -ENOMEDIUM; 226 break; 227 case NOT_READY: /* This happens if there is no disc in drive */ 228 if (sshdr.asc == 0x04 && 229 sshdr.ascq == 0x01) { 230 /* sense: Logical unit is in process of becoming ready */ 231 if (!cgc->quiet) 232 printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name); 233 if (retries++ < 10) { 234 /* sleep 2 sec and try again */ 235 ssleep(2); 236 goto retry; 237 } else { 238 /* 20 secs are enough? */ 239 err = -ENOMEDIUM; 240 break; 241 } 242 } 243 if (!cgc->quiet) 244 printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name); 245#ifdef DEBUG 246 scsi_print_sense_hdr("sr", &sshdr); 247#endif 248 err = -ENOMEDIUM; 249 break; 250 case ILLEGAL_REQUEST: 251 err = -EIO; 252 if (sshdr.asc == 0x20 && 253 sshdr.ascq == 0x00) 254 /* sense: Invalid command operation code */ 255 err = -EDRIVE_CANT_DO_THIS; 256#ifdef DEBUG 257 __scsi_print_command(cgc->cmd); 258 scsi_print_sense_hdr("sr", &sshdr); 259#endif 260 break; 261 default: 262 printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name); 263 __scsi_print_command(cgc->cmd); 264 scsi_print_sense_hdr("sr", &sshdr); 265 err = -EIO; 266 } 267 } 268 269 /* Wake up a process waiting for device */ 270 out: 271 if (!cgc->sense) 272 kfree(sense); 273 cgc->stat = err; 274 return err; 275} 276 277/* ---------------------------------------------------------------------- */ 278/* interface to cdrom.c */ 279 280int sr_tray_move(struct cdrom_device_info *cdi, int pos) 281{ 282 Scsi_CD *cd = cdi->handle; 283 struct packet_command cgc; 284 285 memset(&cgc, 0, sizeof(struct packet_command)); 286 cgc.cmd[0] = GPCMD_START_STOP_UNIT; 287 cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ; 288 cgc.data_direction = DMA_NONE; 289 cgc.timeout = IOCTL_TIMEOUT; 290 return sr_do_ioctl(cd, &cgc); 291} 292 293int sr_lock_door(struct cdrom_device_info *cdi, int lock) 294{ 295 Scsi_CD *cd = cdi->handle; 296 297 return scsi_set_medium_removal(cd->device, lock ? 298 SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); 299} 300 301int sr_drive_status(struct cdrom_device_info *cdi, int slot) 302{ 303 struct scsi_cd *cd = cdi->handle; 304 struct scsi_sense_hdr sshdr; 305 struct media_event_desc med; 306 307 if (CDSL_CURRENT != slot) { 308 /* we have no changer support */ 309 return -EINVAL; 310 } 311 if (!scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr)) 312 return CDS_DISC_OK; 313 314 /* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */ 315 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY 316 && sshdr.asc == 0x04 && sshdr.ascq == 0x01) 317 return CDS_DRIVE_NOT_READY; 318 319 if (!cdrom_get_media_event(cdi, &med)) { 320 if (med.media_present) 321 return CDS_DISC_OK; 322 else if (med.door_open) 323 return CDS_TRAY_OPEN; 324 else 325 return CDS_NO_DISC; 326 } 327 328 /* 329 * SK/ASC/ASCQ of 2/4/2 means "initialization required" 330 * Using CD_TRAY_OPEN results in an START_STOP_UNIT to close 331 * the tray, which resolves the initialization requirement. 332 */ 333 if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY 334 && sshdr.asc == 0x04 && sshdr.ascq == 0x02) 335 return CDS_TRAY_OPEN; 336 337 /* 338 * 0x04 is format in progress .. but there must be a disc present! 339 */ 340 if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04) 341 return CDS_DISC_OK; 342 343 /* 344 * If not using Mt Fuji extended media tray reports, 345 * just return TRAY_OPEN since ATAPI doesn't provide 346 * any other way to detect this... 347 */ 348 if (scsi_sense_valid(&sshdr) && 349 /* 0x3a is medium not present */ 350 sshdr.asc == 0x3a) 351 return CDS_NO_DISC; 352 else 353 return CDS_TRAY_OPEN; 354 355 return CDS_DRIVE_NOT_READY; 356} 357 358int sr_disk_status(struct cdrom_device_info *cdi) 359{ 360 Scsi_CD *cd = cdi->handle; 361 struct cdrom_tochdr toc_h; 362 struct cdrom_tocentry toc_e; 363 int i, rc, have_datatracks = 0; 364 365 /* look for data tracks */ 366 rc = sr_read_tochdr(cdi, &toc_h); 367 if (rc) 368 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO; 369 370 for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) { 371 toc_e.cdte_track = i; 372 toc_e.cdte_format = CDROM_LBA; 373 if (sr_read_tocentry(cdi, &toc_e)) 374 return CDS_NO_INFO; 375 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) { 376 have_datatracks = 1; 377 break; 378 } 379 } 380 if (!have_datatracks) 381 return CDS_AUDIO; 382 383 if (cd->xa_flag) 384 return CDS_XA_2_1; 385 else 386 return CDS_DATA_1; 387} 388 389int sr_get_last_session(struct cdrom_device_info *cdi, 390 struct cdrom_multisession *ms_info) 391{ 392 Scsi_CD *cd = cdi->handle; 393 394 ms_info->addr.lba = cd->ms_offset; 395 ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0; 396 397 return 0; 398} 399 400int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) 401{ 402 Scsi_CD *cd = cdi->handle; 403 struct packet_command cgc; 404 char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); 405 int result; 406 407 if (!buffer) 408 return -ENOMEM; 409 410 memset(&cgc, 0, sizeof(struct packet_command)); 411 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 412 cgc.cmd[2] = 0x40; /* I do want the subchannel info */ 413 cgc.cmd[3] = 0x02; /* Give me medium catalog number info */ 414 cgc.cmd[8] = 24; 415 cgc.buffer = buffer; 416 cgc.buflen = 24; 417 cgc.data_direction = DMA_FROM_DEVICE; 418 cgc.timeout = IOCTL_TIMEOUT; 419 result = sr_do_ioctl(cd, &cgc); 420 421 memcpy(mcn->medium_catalog_number, buffer + 9, 13); 422 mcn->medium_catalog_number[13] = 0; 423 424 kfree(buffer); 425 return result; 426} 427 428int sr_reset(struct cdrom_device_info *cdi) 429{ 430 return 0; 431} 432 433int sr_select_speed(struct cdrom_device_info *cdi, int speed) 434{ 435 Scsi_CD *cd = cdi->handle; 436 struct packet_command cgc; 437 438 if (speed == 0) 439 speed = 0xffff; /* set to max */ 440 else 441 speed *= 177; /* Nx to kbyte/s */ 442 443 memset(&cgc, 0, sizeof(struct packet_command)); 444 cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */ 445 cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */ 446 cgc.cmd[3] = speed & 0xff; /* LSB */ 447 cgc.data_direction = DMA_NONE; 448 cgc.timeout = IOCTL_TIMEOUT; 449 450 if (sr_do_ioctl(cd, &cgc)) 451 return -EIO; 452 return 0; 453} 454 455/* ----------------------------------------------------------------------- */ 456/* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */ 457/* because the generic cdrom driver does the user access stuff for us. */ 458/* only cdromreadtochdr and cdromreadtocentry are left - for use with the */ 459/* sr_disk_status interface for the generic cdrom driver. */ 460 461int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) 462{ 463 switch (cmd) { 464 case CDROMREADTOCHDR: 465 return sr_read_tochdr(cdi, arg); 466 case CDROMREADTOCENTRY: 467 return sr_read_tocentry(cdi, arg); 468 case CDROMPLAYTRKIND: 469 return sr_play_trkind(cdi, arg); 470 default: 471 return -EINVAL; 472 } 473} 474 475/* ----------------------------------------------------------------------- 476 * a function to read all sorts of funny cdrom sectors using the READ_CD 477 * scsi-3 mmc command 478 * 479 * lba: linear block address 480 * format: 0 = data (anything) 481 * 1 = audio 482 * 2 = data (mode 1) 483 * 3 = data (mode 2) 484 * 4 = data (mode 2 form1) 485 * 5 = data (mode 2 form2) 486 * blksize: 2048 | 2336 | 2340 | 2352 487 */ 488 489static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize) 490{ 491 struct packet_command cgc; 492 493#ifdef DEBUG 494 printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n", 495 cd->cdi.name, lba, format, blksize); 496#endif 497 498 memset(&cgc, 0, sizeof(struct packet_command)); 499 cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */ 500 cgc.cmd[1] = ((format & 7) << 2); 501 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 502 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 503 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 504 cgc.cmd[5] = (unsigned char) lba & 0xff; 505 cgc.cmd[8] = 1; 506 switch (blksize) { 507 case 2336: 508 cgc.cmd[9] = 0x58; 509 break; 510 case 2340: 511 cgc.cmd[9] = 0x78; 512 break; 513 case 2352: 514 cgc.cmd[9] = 0xf8; 515 break; 516 default: 517 cgc.cmd[9] = 0x10; 518 break; 519 } 520 cgc.buffer = dest; 521 cgc.buflen = blksize; 522 cgc.data_direction = DMA_FROM_DEVICE; 523 cgc.timeout = IOCTL_TIMEOUT; 524 return sr_do_ioctl(cd, &cgc); 525} 526 527/* 528 * read sectors with blocksizes other than 2048 529 */ 530 531static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest) 532{ 533 struct packet_command cgc; 534 int rc; 535 536 /* we try the READ CD command first... */ 537 if (cd->readcd_known) { 538 rc = sr_read_cd(cd, dest, lba, 0, blksize); 539 if (-EDRIVE_CANT_DO_THIS != rc) 540 return rc; 541 cd->readcd_known = 0; 542 printk("CDROM does'nt support READ CD (0xbe) command\n"); 543 /* fall & retry the other way */ 544 } 545 /* ... if this fails, we switch the blocksize using MODE SELECT */ 546 if (blksize != cd->device->sector_size) { 547 if (0 != (rc = sr_set_blocklength(cd, blksize))) 548 return rc; 549 } 550#ifdef DEBUG 551 printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize); 552#endif 553 554 memset(&cgc, 0, sizeof(struct packet_command)); 555 cgc.cmd[0] = GPCMD_READ_10; 556 cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; 557 cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; 558 cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; 559 cgc.cmd[5] = (unsigned char) lba & 0xff; 560 cgc.cmd[8] = 1; 561 cgc.buffer = dest; 562 cgc.buflen = blksize; 563 cgc.data_direction = DMA_FROM_DEVICE; 564 cgc.timeout = IOCTL_TIMEOUT; 565 rc = sr_do_ioctl(cd, &cgc); 566 567 return rc; 568} 569 570/* 571 * read a sector in raw mode to check the sector format 572 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 573 */ 574 575int sr_is_xa(Scsi_CD *cd) 576{ 577 unsigned char *raw_sector; 578 int is_xa; 579 580 if (!xa_test) 581 return 0; 582 583 raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd)); 584 if (!raw_sector) 585 return -ENOMEM; 586 if (0 == sr_read_sector(cd, cd->ms_offset + 16, 587 CD_FRAMESIZE_RAW1, raw_sector)) { 588 is_xa = (raw_sector[3] == 0x02) ? 1 : 0; 589 } else { 590 /* read a raw sector failed for some reason. */ 591 is_xa = -1; 592 } 593 kfree(raw_sector); 594#ifdef DEBUG 595 printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa); 596#endif 597 return is_xa; 598} 599